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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
4 * Copyright (C) 1992 Eric Youngdale
5 * Simulate a host adapter with 2 disks attached. Do a lot of checking
6 * to make sure that we are not getting blocks mixed up, and PANIC if
7 * anything out of the ordinary is seen.
8 * ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
9 *
10 * Copyright (C) 2001 - 2020 Douglas Gilbert
11 *
12 * For documentation see http://sg.danny.cz/sg/scsi_debug.html
13 */
14
15
16#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
17
18#include <linux/module.h>
19
20#include <linux/kernel.h>
21#include <linux/errno.h>
22#include <linux/jiffies.h>
23#include <linux/slab.h>
24#include <linux/types.h>
25#include <linux/string.h>
26#include <linux/genhd.h>
27#include <linux/fs.h>
28#include <linux/init.h>
29#include <linux/proc_fs.h>
30#include <linux/vmalloc.h>
31#include <linux/moduleparam.h>
32#include <linux/scatterlist.h>
33#include <linux/blkdev.h>
34#include <linux/crc-t10dif.h>
35#include <linux/spinlock.h>
36#include <linux/interrupt.h>
37#include <linux/atomic.h>
38#include <linux/hrtimer.h>
39#include <linux/uuid.h>
40#include <linux/t10-pi.h>
41#include <linux/msdos_partition.h>
42#include <linux/random.h>
43#include <linux/xarray.h>
44#include <linux/prefetch.h>
45
46#include <net/checksum.h>
47
48#include <asm/unaligned.h>
49
50#include <scsi/scsi.h>
51#include <scsi/scsi_cmnd.h>
52#include <scsi/scsi_device.h>
53#include <scsi/scsi_host.h>
54#include <scsi/scsicam.h>
55#include <scsi/scsi_eh.h>
56#include <scsi/scsi_tcq.h>
57#include <scsi/scsi_dbg.h>
58
59#include "sd.h"
60#include "scsi_logging.h"
61
62/* make sure inq_product_rev string corresponds to this version */
63#define SDEBUG_VERSION "0190" /* format to fit INQUIRY revision field */
64static const char *sdebug_version_date = "20200710";
65
66#define MY_NAME "scsi_debug"
67
68/* Additional Sense Code (ASC) */
69#define NO_ADDITIONAL_SENSE 0x0
70#define LOGICAL_UNIT_NOT_READY 0x4
71#define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
72#define UNRECOVERED_READ_ERR 0x11
73#define PARAMETER_LIST_LENGTH_ERR 0x1a
74#define INVALID_OPCODE 0x20
75#define LBA_OUT_OF_RANGE 0x21
76#define INVALID_FIELD_IN_CDB 0x24
77#define INVALID_FIELD_IN_PARAM_LIST 0x26
78#define WRITE_PROTECTED 0x27
79#define UA_RESET_ASC 0x29
80#define UA_CHANGED_ASC 0x2a
81#define TARGET_CHANGED_ASC 0x3f
82#define LUNS_CHANGED_ASCQ 0x0e
83#define INSUFF_RES_ASC 0x55
84#define INSUFF_RES_ASCQ 0x3
85#define POWER_ON_RESET_ASCQ 0x0
86#define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */
87#define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */
88#define CAPACITY_CHANGED_ASCQ 0x9
89#define SAVING_PARAMS_UNSUP 0x39
90#define TRANSPORT_PROBLEM 0x4b
91#define THRESHOLD_EXCEEDED 0x5d
92#define LOW_POWER_COND_ON 0x5e
93#define MISCOMPARE_VERIFY_ASC 0x1d
94#define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */
95#define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16
96#define WRITE_ERROR_ASC 0xc
97#define UNALIGNED_WRITE_ASCQ 0x4
98#define WRITE_BOUNDARY_ASCQ 0x5
99#define READ_INVDATA_ASCQ 0x6
100#define READ_BOUNDARY_ASCQ 0x7
101#define INSUFF_ZONE_ASCQ 0xe
102
103/* Additional Sense Code Qualifier (ASCQ) */
104#define ACK_NAK_TO 0x3
105
106/* Default values for driver parameters */
107#define DEF_NUM_HOST 1
108#define DEF_NUM_TGTS 1
109#define DEF_MAX_LUNS 1
110/* With these defaults, this driver will make 1 host with 1 target
111 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
112 */
113#define DEF_ATO 1
114#define DEF_CDB_LEN 10
115#define DEF_JDELAY 1 /* if > 0 unit is a jiffy */
116#define DEF_DEV_SIZE_PRE_INIT 0
117#define DEF_DEV_SIZE_MB 8
118#define DEF_ZBC_DEV_SIZE_MB 128
119#define DEF_DIF 0
120#define DEF_DIX 0
121#define DEF_PER_HOST_STORE false
122#define DEF_D_SENSE 0
123#define DEF_EVERY_NTH 0
124#define DEF_FAKE_RW 0
125#define DEF_GUARD 0
126#define DEF_HOST_LOCK 0
127#define DEF_LBPU 0
128#define DEF_LBPWS 0
129#define DEF_LBPWS10 0
130#define DEF_LBPRZ 1
131#define DEF_LOWEST_ALIGNED 0
132#define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */
133#define DEF_NO_LUN_0 0
134#define DEF_NUM_PARTS 0
135#define DEF_OPTS 0
136#define DEF_OPT_BLKS 1024
137#define DEF_PHYSBLK_EXP 0
138#define DEF_OPT_XFERLEN_EXP 0
139#define DEF_PTYPE TYPE_DISK
140#define DEF_RANDOM false
141#define DEF_REMOVABLE false
142#define DEF_SCSI_LEVEL 7 /* INQUIRY, byte2 [6->SPC-4; 7->SPC-5] */
143#define DEF_SECTOR_SIZE 512
144#define DEF_UNMAP_ALIGNMENT 0
145#define DEF_UNMAP_GRANULARITY 1
146#define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
147#define DEF_UNMAP_MAX_DESC 256
148#define DEF_VIRTUAL_GB 0
149#define DEF_VPD_USE_HOSTNO 1
150#define DEF_WRITESAME_LENGTH 0xFFFF
151#define DEF_STRICT 0
152#define DEF_STATISTICS false
153#define DEF_SUBMIT_QUEUES 1
154#define DEF_TUR_MS_TO_READY 0
155#define DEF_UUID_CTL 0
156#define JDELAY_OVERRIDDEN -9999
157
158/* Default parameters for ZBC drives */
159#define DEF_ZBC_ZONE_SIZE_MB 128
160#define DEF_ZBC_MAX_OPEN_ZONES 8
161#define DEF_ZBC_NR_CONV_ZONES 1
162
163#define SDEBUG_LUN_0_VAL 0
164
165/* bit mask values for sdebug_opts */
166#define SDEBUG_OPT_NOISE 1
167#define SDEBUG_OPT_MEDIUM_ERR 2
168#define SDEBUG_OPT_TIMEOUT 4
169#define SDEBUG_OPT_RECOVERED_ERR 8
170#define SDEBUG_OPT_TRANSPORT_ERR 16
171#define SDEBUG_OPT_DIF_ERR 32
172#define SDEBUG_OPT_DIX_ERR 64
173#define SDEBUG_OPT_MAC_TIMEOUT 128
174#define SDEBUG_OPT_SHORT_TRANSFER 0x100
175#define SDEBUG_OPT_Q_NOISE 0x200
176#define SDEBUG_OPT_ALL_TSF 0x400
177#define SDEBUG_OPT_RARE_TSF 0x800
178#define SDEBUG_OPT_N_WCE 0x1000
179#define SDEBUG_OPT_RESET_NOISE 0x2000
180#define SDEBUG_OPT_NO_CDB_NOISE 0x4000
181#define SDEBUG_OPT_HOST_BUSY 0x8000
182#define SDEBUG_OPT_CMD_ABORT 0x10000
183#define SDEBUG_OPT_ALL_NOISE (SDEBUG_OPT_NOISE | SDEBUG_OPT_Q_NOISE | \
184 SDEBUG_OPT_RESET_NOISE)
185#define SDEBUG_OPT_ALL_INJECTING (SDEBUG_OPT_RECOVERED_ERR | \
186 SDEBUG_OPT_TRANSPORT_ERR | \
187 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR | \
188 SDEBUG_OPT_SHORT_TRANSFER | \
189 SDEBUG_OPT_HOST_BUSY | \
190 SDEBUG_OPT_CMD_ABORT)
191#define SDEBUG_OPT_RECOV_DIF_DIX (SDEBUG_OPT_RECOVERED_ERR | \
192 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR)
193
194/* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs) are returned in
195 * priority order. In the subset implemented here lower numbers have higher
196 * priority. The UA numbers should be a sequence starting from 0 with
197 * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */
198#define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */
199#define SDEBUG_UA_BUS_RESET 1
200#define SDEBUG_UA_MODE_CHANGED 2
201#define SDEBUG_UA_CAPACITY_CHANGED 3
202#define SDEBUG_UA_LUNS_CHANGED 4
203#define SDEBUG_UA_MICROCODE_CHANGED 5 /* simulate firmware change */
204#define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 6
205#define SDEBUG_NUM_UAS 7
206
207/* when 1==SDEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
208 * sector on read commands: */
209#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
210#define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
211
212/* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
213 * or "peripheral device" addressing (value 0) */
214#define SAM2_LUN_ADDRESS_METHOD 0
215
216/* SDEBUG_CANQUEUE is the maximum number of commands that can be queued
217 * (for response) per submit queue at one time. Can be reduced by max_queue
218 * option. Command responses are not queued when jdelay=0 and ndelay=0. The
219 * per-device DEF_CMD_PER_LUN can be changed via sysfs:
220 * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth
221 * but cannot exceed SDEBUG_CANQUEUE .
222 */
223#define SDEBUG_CANQUEUE_WORDS 3 /* a WORD is bits in a long */
224#define SDEBUG_CANQUEUE (SDEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
225#define DEF_CMD_PER_LUN 255
226
227/* UA - Unit Attention; SA - Service Action; SSU - Start Stop Unit */
228#define F_D_IN 1 /* Data-in command (e.g. READ) */
229#define F_D_OUT 2 /* Data-out command (e.g. WRITE) */
230#define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */
231#define F_D_UNKN 8
232#define F_RL_WLUN_OK 0x10 /* allowed with REPORT LUNS W-LUN */
233#define F_SKIP_UA 0x20 /* bypass UAs (e.g. INQUIRY command) */
234#define F_DELAY_OVERR 0x40 /* for commands like INQUIRY */
235#define F_SA_LOW 0x80 /* SA is in cdb byte 1, bits 4 to 0 */
236#define F_SA_HIGH 0x100 /* SA is in cdb bytes 8 and 9 */
237#define F_INV_OP 0x200 /* invalid opcode (not supported) */
238#define F_FAKE_RW 0x400 /* bypass resp_*() when fake_rw set */
239#define F_M_ACCESS 0x800 /* media access, reacts to SSU state */
240#define F_SSU_DELAY 0x1000 /* SSU command delay (long-ish) */
241#define F_SYNC_DELAY 0x2000 /* SYNCHRONIZE CACHE delay */
242
243/* Useful combinations of the above flags */
244#define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR)
245#define FF_MEDIA_IO (F_M_ACCESS | F_FAKE_RW)
246#define FF_SA (F_SA_HIGH | F_SA_LOW)
247#define F_LONG_DELAY (F_SSU_DELAY | F_SYNC_DELAY)
248
249#define SDEBUG_MAX_PARTS 4
250
251#define SDEBUG_MAX_CMD_LEN 32
252
253#define SDEB_XA_NOT_IN_USE XA_MARK_1
254
255/* Zone types (zbcr05 table 25) */
256enum sdebug_z_type {
257 ZBC_ZONE_TYPE_CNV = 0x1,
258 ZBC_ZONE_TYPE_SWR = 0x2,
259 ZBC_ZONE_TYPE_SWP = 0x3,
260};
261
262/* enumeration names taken from table 26, zbcr05 */
263enum sdebug_z_cond {
264 ZBC_NOT_WRITE_POINTER = 0x0,
265 ZC1_EMPTY = 0x1,
266 ZC2_IMPLICIT_OPEN = 0x2,
267 ZC3_EXPLICIT_OPEN = 0x3,
268 ZC4_CLOSED = 0x4,
269 ZC6_READ_ONLY = 0xd,
270 ZC5_FULL = 0xe,
271 ZC7_OFFLINE = 0xf,
272};
273
274struct sdeb_zone_state { /* ZBC: per zone state */
275 enum sdebug_z_type z_type;
276 enum sdebug_z_cond z_cond;
277 bool z_non_seq_resource;
278 unsigned int z_size;
279 sector_t z_start;
280 sector_t z_wp;
281};
282
283struct sdebug_dev_info {
284 struct list_head dev_list;
285 unsigned int channel;
286 unsigned int target;
287 u64 lun;
288 uuid_t lu_name;
289 struct sdebug_host_info *sdbg_host;
290 unsigned long uas_bm[1];
291 atomic_t num_in_q;
292 atomic_t stopped; /* 1: by SSU, 2: device start */
293 bool used;
294
295 /* For ZBC devices */
296 enum blk_zoned_model zmodel;
297 unsigned int zsize;
298 unsigned int zsize_shift;
299 unsigned int nr_zones;
300 unsigned int nr_conv_zones;
301 unsigned int nr_imp_open;
302 unsigned int nr_exp_open;
303 unsigned int nr_closed;
304 unsigned int max_open;
305 ktime_t create_ts; /* time since bootup that this device was created */
306 struct sdeb_zone_state *zstate;
307};
308
309struct sdebug_host_info {
310 struct list_head host_list;
311 int si_idx; /* sdeb_store_info (per host) xarray index */
312 struct Scsi_Host *shost;
313 struct device dev;
314 struct list_head dev_info_list;
315};
316
317/* There is an xarray of pointers to this struct's objects, one per host */
318struct sdeb_store_info {
319 rwlock_t macc_lck; /* for atomic media access on this store */
320 u8 *storep; /* user data storage (ram) */
321 struct t10_pi_tuple *dif_storep; /* protection info */
322 void *map_storep; /* provisioning map */
323};
324
325#define to_sdebug_host(d) \
326 container_of(d, struct sdebug_host_info, dev)
327
328enum sdeb_defer_type {SDEB_DEFER_NONE = 0, SDEB_DEFER_HRT = 1,
329 SDEB_DEFER_WQ = 2};
330
331struct sdebug_defer {
332 struct hrtimer hrt;
333 struct execute_work ew;
334 int sqa_idx; /* index of sdebug_queue array */
335 int qc_idx; /* index of sdebug_queued_cmd array within sqa_idx */
336 int hc_idx; /* hostwide tag index */
337 int issuing_cpu;
338 bool init_hrt;
339 bool init_wq;
340 bool aborted; /* true when blk_abort_request() already called */
341 enum sdeb_defer_type defer_t;
342};
343
344struct sdebug_queued_cmd {
345 /* corresponding bit set in in_use_bm[] in owning struct sdebug_queue
346 * instance indicates this slot is in use.
347 */
348 struct sdebug_defer *sd_dp;
349 struct scsi_cmnd *a_cmnd;
350};
351
352struct sdebug_queue {
353 struct sdebug_queued_cmd qc_arr[SDEBUG_CANQUEUE];
354 unsigned long in_use_bm[SDEBUG_CANQUEUE_WORDS];
355 spinlock_t qc_lock;
356 atomic_t blocked; /* to temporarily stop more being queued */
357};
358
359static atomic_t sdebug_cmnd_count; /* number of incoming commands */
360static atomic_t sdebug_completions; /* count of deferred completions */
361static atomic_t sdebug_miss_cpus; /* submission + completion cpus differ */
362static atomic_t sdebug_a_tsf; /* 'almost task set full' counter */
363static atomic_t sdeb_inject_pending;
364
365struct opcode_info_t {
366 u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff */
367 /* for terminating element */
368 u8 opcode; /* if num_attached > 0, preferred */
369 u16 sa; /* service action */
370 u32 flags; /* OR-ed set of SDEB_F_* */
371 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
372 const struct opcode_info_t *arrp; /* num_attached elements or NULL */
373 u8 len_mask[16]; /* len_mask[0]-->cdb_len, then mask for cdb */
374 /* 1 to min(cdb_len, 15); ignore cdb[15...] */
375};
376
377/* SCSI opcodes (first byte of cdb) of interest mapped onto these indexes */
378enum sdeb_opcode_index {
379 SDEB_I_INVALID_OPCODE = 0,
380 SDEB_I_INQUIRY = 1,
381 SDEB_I_REPORT_LUNS = 2,
382 SDEB_I_REQUEST_SENSE = 3,
383 SDEB_I_TEST_UNIT_READY = 4,
384 SDEB_I_MODE_SENSE = 5, /* 6, 10 */
385 SDEB_I_MODE_SELECT = 6, /* 6, 10 */
386 SDEB_I_LOG_SENSE = 7,
387 SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */
388 SDEB_I_READ = 9, /* 6, 10, 12, 16 */
389 SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */
390 SDEB_I_START_STOP = 11,
391 SDEB_I_SERV_ACT_IN_16 = 12, /* add ...SERV_ACT_IN_12 if needed */
392 SDEB_I_SERV_ACT_OUT_16 = 13, /* add ...SERV_ACT_OUT_12 if needed */
393 SDEB_I_MAINT_IN = 14,
394 SDEB_I_MAINT_OUT = 15,
395 SDEB_I_VERIFY = 16, /* VERIFY(10), VERIFY(16) */
396 SDEB_I_VARIABLE_LEN = 17, /* READ(32), WRITE(32), WR_SCAT(32) */
397 SDEB_I_RESERVE = 18, /* 6, 10 */
398 SDEB_I_RELEASE = 19, /* 6, 10 */
399 SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
400 SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */
401 SDEB_I_ATA_PT = 22, /* 12, 16 */
402 SDEB_I_SEND_DIAG = 23,
403 SDEB_I_UNMAP = 24,
404 SDEB_I_WRITE_BUFFER = 25,
405 SDEB_I_WRITE_SAME = 26, /* 10, 16 */
406 SDEB_I_SYNC_CACHE = 27, /* 10, 16 */
407 SDEB_I_COMP_WRITE = 28,
408 SDEB_I_PRE_FETCH = 29, /* 10, 16 */
409 SDEB_I_ZONE_OUT = 30, /* 0x94+SA; includes no data xfer */
410 SDEB_I_ZONE_IN = 31, /* 0x95+SA; all have data-in */
411 SDEB_I_LAST_ELEM_P1 = 32, /* keep this last (previous + 1) */
412};
413
414
415static const unsigned char opcode_ind_arr[256] = {
416/* 0x0; 0x0->0x1f: 6 byte cdbs */
417 SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE,
418 0, 0, 0, 0,
419 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0,
420 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
421 SDEB_I_RELEASE,
422 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG,
423 SDEB_I_ALLOW_REMOVAL, 0,
424/* 0x20; 0x20->0x3f: 10 byte cdbs */
425 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0,
426 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY,
427 0, 0, 0, 0, SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, 0,
428 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0,
429/* 0x40; 0x40->0x5f: 10 byte cdbs */
430 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0,
431 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0,
432 0, 0, 0, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
433 SDEB_I_RELEASE,
434 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0,
435/* 0x60; 0x60->0x7d are reserved, 0x7e is "extended cdb" */
436 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
437 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
438 0, SDEB_I_VARIABLE_LEN,
439/* 0x80; 0x80->0x9f: 16 byte cdbs */
440 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0,
441 SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0,
442 0, 0, 0, SDEB_I_VERIFY,
443 SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, SDEB_I_WRITE_SAME,
444 SDEB_I_ZONE_OUT, SDEB_I_ZONE_IN, 0, 0,
445 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN_16, SDEB_I_SERV_ACT_OUT_16,
446/* 0xa0; 0xa0->0xbf: 12 byte cdbs */
447 SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN,
448 SDEB_I_MAINT_OUT, 0, 0, 0,
449 SDEB_I_READ, 0 /* SDEB_I_SERV_ACT_OUT_12 */, SDEB_I_WRITE,
450 0 /* SDEB_I_SERV_ACT_IN_12 */, 0, 0, 0, 0,
451 0, 0, 0, 0, 0, 0, 0, 0,
452 0, 0, 0, 0, 0, 0, 0, 0,
453/* 0xc0; 0xc0->0xff: vendor specific */
454 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
455 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
456 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
457 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
458};
459
460/*
461 * The following "response" functions return the SCSI mid-level's 4 byte
462 * tuple-in-an-int. To handle commands with an IMMED bit, for a faster
463 * command completion, they can mask their return value with
464 * SDEG_RES_IMMED_MASK .
465 */
466#define SDEG_RES_IMMED_MASK 0x40000000
467
468static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *);
469static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *);
470static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *);
471static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
472static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *);
473static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
474static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
475static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
476static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
477static int resp_write_scat(struct scsi_cmnd *, struct sdebug_dev_info *);
478static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
479static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
480static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
481static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *);
482static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *);
483static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *);
484static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *);
485static int resp_verify(struct scsi_cmnd *, struct sdebug_dev_info *);
486static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *);
487static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *);
488static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
489static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *);
490static int resp_sync_cache(struct scsi_cmnd *, struct sdebug_dev_info *);
491static int resp_pre_fetch(struct scsi_cmnd *, struct sdebug_dev_info *);
492static int resp_report_zones(struct scsi_cmnd *, struct sdebug_dev_info *);
493static int resp_open_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
494static int resp_close_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
495static int resp_finish_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
496static int resp_rwp_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
497
498static int sdebug_do_add_host(bool mk_new_store);
499static int sdebug_add_host_helper(int per_host_idx);
500static void sdebug_do_remove_host(bool the_end);
501static int sdebug_add_store(void);
502static void sdebug_erase_store(int idx, struct sdeb_store_info *sip);
503static void sdebug_erase_all_stores(bool apart_from_first);
504
505/*
506 * The following are overflow arrays for cdbs that "hit" the same index in
507 * the opcode_info_arr array. The most time sensitive (or commonly used) cdb
508 * should be placed in opcode_info_arr[], the others should be placed here.
509 */
510static const struct opcode_info_t msense_iarr[] = {
511 {0, 0x1a, 0, F_D_IN, NULL, NULL,
512 {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
513};
514
515static const struct opcode_info_t mselect_iarr[] = {
516 {0, 0x15, 0, F_D_OUT, NULL, NULL,
517 {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
518};
519
520static const struct opcode_info_t read_iarr[] = {
521 {0, 0x28, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(10) */
522 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
523 0, 0, 0, 0} },
524 {0, 0x8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL, /* READ(6) */
525 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
526 {0, 0xa8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(12) */
527 {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf,
528 0xc7, 0, 0, 0, 0} },
529};
530
531static const struct opcode_info_t write_iarr[] = {
532 {0, 0x2a, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(10) */
533 NULL, {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7,
534 0, 0, 0, 0, 0, 0} },
535 {0, 0xa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(6) */
536 NULL, {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0,
537 0, 0, 0} },
538 {0, 0xaa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(12) */
539 NULL, {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
540 0xbf, 0xc7, 0, 0, 0, 0} },
541};
542
543static const struct opcode_info_t verify_iarr[] = {
544 {0, 0x2f, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify,/* VERIFY(10) */
545 NULL, {10, 0xf7, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xff, 0xff, 0xc7,
546 0, 0, 0, 0, 0, 0} },
547};
548
549static const struct opcode_info_t sa_in_16_iarr[] = {
550 {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL,
551 {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
552 0xff, 0xff, 0xff, 0, 0xc7} }, /* GET LBA STATUS(16) */
553};
554
555static const struct opcode_info_t vl_iarr[] = { /* VARIABLE LENGTH */
556 {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_dt0,
557 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0xb, 0xfa,
558 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
559 {0, 0x7f, 0x11, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
560 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x11, 0xf8,
561 0, 0xff, 0xff, 0x0, 0x0} }, /* WRITE SCATTERED(32) */
562};
563
564static const struct opcode_info_t maint_in_iarr[] = { /* MAINT IN */
565 {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL,
566 {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
567 0xc7, 0, 0, 0, 0} }, /* REPORT SUPPORTED OPERATION CODES */
568 {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL,
569 {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
570 0, 0} }, /* REPORTED SUPPORTED TASK MANAGEMENT FUNCTIONS */
571};
572
573static const struct opcode_info_t write_same_iarr[] = {
574 {0, 0x93, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_write_same_16, NULL,
575 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
576 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* WRITE SAME(16) */
577};
578
579static const struct opcode_info_t reserve_iarr[] = {
580 {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */
581 {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
582};
583
584static const struct opcode_info_t release_iarr[] = {
585 {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */
586 {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
587};
588
589static const struct opcode_info_t sync_cache_iarr[] = {
590 {0, 0x91, 0, F_SYNC_DELAY | F_M_ACCESS, resp_sync_cache, NULL,
591 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
592 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* SYNC_CACHE (16) */
593};
594
595static const struct opcode_info_t pre_fetch_iarr[] = {
596 {0, 0x90, 0, F_SYNC_DELAY | FF_MEDIA_IO, resp_pre_fetch, NULL,
597 {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
598 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* PRE-FETCH (16) */
599};
600
601static const struct opcode_info_t zone_out_iarr[] = { /* ZONE OUT(16) */
602 {0, 0x94, 0x1, F_SA_LOW | F_M_ACCESS, resp_close_zone, NULL,
603 {16, 0x1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
604 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* CLOSE ZONE */
605 {0, 0x94, 0x2, F_SA_LOW | F_M_ACCESS, resp_finish_zone, NULL,
606 {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
607 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* FINISH ZONE */
608 {0, 0x94, 0x4, F_SA_LOW | F_M_ACCESS, resp_rwp_zone, NULL,
609 {16, 0x4, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
610 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* RESET WRITE POINTER */
611};
612
613static const struct opcode_info_t zone_in_iarr[] = { /* ZONE IN(16) */
614 {0, 0x95, 0x6, F_SA_LOW | F_D_IN | F_M_ACCESS, NULL, NULL,
615 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
616 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* REPORT ZONES */
617};
618
619
620/* This array is accessed via SDEB_I_* values. Make sure all are mapped,
621 * plus the terminating elements for logic that scans this table such as
622 * REPORT SUPPORTED OPERATION CODES. */
623static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEM_P1 + 1] = {
624/* 0 */
625 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* unknown opcodes */
626 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
627 {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL, /* INQUIRY */
628 {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
629 {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL,
630 {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
631 0, 0} }, /* REPORT LUNS */
632 {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL,
633 {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
634 {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */
635 {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
636/* 5 */
637 {ARRAY_SIZE(msense_iarr), 0x5a, 0, F_D_IN, /* MODE SENSE(10) */
638 resp_mode_sense, msense_iarr, {10, 0xf8, 0xff, 0xff, 0, 0, 0,
639 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
640 {ARRAY_SIZE(mselect_iarr), 0x55, 0, F_D_OUT, /* MODE SELECT(10) */
641 resp_mode_select, mselect_iarr, {10, 0xf1, 0, 0, 0, 0, 0, 0xff,
642 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
643 {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL, /* LOG SENSE */
644 {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0,
645 0, 0, 0} },
646 {0, 0x25, 0, F_D_IN, resp_readcap, NULL, /* READ CAPACITY(10) */
647 {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0,
648 0, 0} },
649 {ARRAY_SIZE(read_iarr), 0x88, 0, F_D_IN | FF_MEDIA_IO, /* READ(16) */
650 resp_read_dt0, read_iarr, {16, 0xfe, 0xff, 0xff, 0xff, 0xff,
651 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
652/* 10 */
653 {ARRAY_SIZE(write_iarr), 0x8a, 0, F_D_OUT | FF_MEDIA_IO,
654 resp_write_dt0, write_iarr, /* WRITE(16) */
655 {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
656 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
657 {0, 0x1b, 0, F_SSU_DELAY, resp_start_stop, NULL,/* START STOP UNIT */
658 {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
659 {ARRAY_SIZE(sa_in_16_iarr), 0x9e, 0x10, F_SA_LOW | F_D_IN,
660 resp_readcap16, sa_in_16_iarr, /* SA_IN(16), READ CAPACITY(16) */
661 {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
662 0xff, 0xff, 0xff, 0xff, 0x1, 0xc7} },
663 {0, 0x9f, 0x12, F_SA_LOW | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
664 NULL, {16, 0x12, 0xf9, 0x0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff,
665 0xff, 0xff, 0xff, 0xff, 0xc7} }, /* SA_OUT(16), WRITE SCAT(16) */
666 {ARRAY_SIZE(maint_in_iarr), 0xa3, 0xa, F_SA_LOW | F_D_IN,
667 resp_report_tgtpgs, /* MAINT IN, REPORT TARGET PORT GROUPS */
668 maint_in_iarr, {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff,
669 0xff, 0, 0xc7, 0, 0, 0, 0} },
670/* 15 */
671 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */
672 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
673 {ARRAY_SIZE(verify_iarr), 0x8f, 0,
674 F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify, /* VERIFY(16) */
675 verify_iarr, {16, 0xf6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
676 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} },
677 {ARRAY_SIZE(vl_iarr), 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_MEDIA_IO,
678 resp_read_dt0, vl_iarr, /* VARIABLE LENGTH, READ(32) */
679 {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x9, 0xfe, 0, 0xff, 0xff,
680 0xff, 0xff} },
681 {ARRAY_SIZE(reserve_iarr), 0x56, 0, F_D_OUT,
682 NULL, reserve_iarr, /* RESERVE(10) <no response function> */
683 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
684 0} },
685 {ARRAY_SIZE(release_iarr), 0x57, 0, F_D_OUT,
686 NULL, release_iarr, /* RELEASE(10) <no response function> */
687 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
688 0} },
689/* 20 */
690 {0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */
691 {6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
692 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */
693 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
694 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */
695 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
696 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */
697 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
698 {0, 0x42, 0, F_D_OUT | FF_MEDIA_IO, resp_unmap, NULL, /* UNMAP */
699 {10, 0x1, 0, 0, 0, 0, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
700/* 25 */
701 {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL,
702 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0,
703 0, 0, 0, 0} }, /* WRITE_BUFFER */
704 {ARRAY_SIZE(write_same_iarr), 0x41, 0, F_D_OUT_MAYBE | FF_MEDIA_IO,
705 resp_write_same_10, write_same_iarr, /* WRITE SAME(10) */
706 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0,
707 0, 0, 0, 0, 0} },
708 {ARRAY_SIZE(sync_cache_iarr), 0x35, 0, F_SYNC_DELAY | F_M_ACCESS,
709 resp_sync_cache, sync_cache_iarr,
710 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
711 0, 0, 0, 0} }, /* SYNC_CACHE (10) */
712 {0, 0x89, 0, F_D_OUT | FF_MEDIA_IO, resp_comp_write, NULL,
713 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
714 0, 0xff, 0x3f, 0xc7} }, /* COMPARE AND WRITE */
715 {ARRAY_SIZE(pre_fetch_iarr), 0x34, 0, F_SYNC_DELAY | FF_MEDIA_IO,
716 resp_pre_fetch, pre_fetch_iarr,
717 {10, 0x2, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
718 0, 0, 0, 0} }, /* PRE-FETCH (10) */
719
720/* 30 */
721 {ARRAY_SIZE(zone_out_iarr), 0x94, 0x3, F_SA_LOW | F_M_ACCESS,
722 resp_open_zone, zone_out_iarr, /* ZONE_OUT(16), OPEN ZONE) */
723 {16, 0x3 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
724 0xff, 0xff, 0x0, 0x0, 0xff, 0xff, 0x1, 0xc7} },
725 {ARRAY_SIZE(zone_in_iarr), 0x95, 0x0, F_SA_LOW | F_M_ACCESS,
726 resp_report_zones, zone_in_iarr, /* ZONE_IN(16), REPORT ZONES) */
727 {16, 0x0 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
728 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xc7} },
729/* sentinel */
730 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */
731 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
732};
733
734static int sdebug_num_hosts;
735static int sdebug_add_host = DEF_NUM_HOST; /* in sysfs this is relative */
736static int sdebug_ato = DEF_ATO;
737static int sdebug_cdb_len = DEF_CDB_LEN;
738static int sdebug_jdelay = DEF_JDELAY; /* if > 0 then unit is jiffies */
739static int sdebug_dev_size_mb = DEF_DEV_SIZE_PRE_INIT;
740static int sdebug_dif = DEF_DIF;
741static int sdebug_dix = DEF_DIX;
742static int sdebug_dsense = DEF_D_SENSE;
743static int sdebug_every_nth = DEF_EVERY_NTH;
744static int sdebug_fake_rw = DEF_FAKE_RW;
745static unsigned int sdebug_guard = DEF_GUARD;
746static int sdebug_host_max_queue; /* per host */
747static int sdebug_lowest_aligned = DEF_LOWEST_ALIGNED;
748static int sdebug_max_luns = DEF_MAX_LUNS;
749static int sdebug_max_queue = SDEBUG_CANQUEUE; /* per submit queue */
750static unsigned int sdebug_medium_error_start = OPT_MEDIUM_ERR_ADDR;
751static int sdebug_medium_error_count = OPT_MEDIUM_ERR_NUM;
752static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */
753static int sdebug_ndelay = DEF_NDELAY; /* if > 0 then unit is nanoseconds */
754static int sdebug_no_lun_0 = DEF_NO_LUN_0;
755static int sdebug_no_uld;
756static int sdebug_num_parts = DEF_NUM_PARTS;
757static int sdebug_num_tgts = DEF_NUM_TGTS; /* targets per host */
758static int sdebug_opt_blks = DEF_OPT_BLKS;
759static int sdebug_opts = DEF_OPTS;
760static int sdebug_physblk_exp = DEF_PHYSBLK_EXP;
761static int sdebug_opt_xferlen_exp = DEF_OPT_XFERLEN_EXP;
762static int sdebug_ptype = DEF_PTYPE; /* SCSI peripheral device type */
763static int sdebug_scsi_level = DEF_SCSI_LEVEL;
764static int sdebug_sector_size = DEF_SECTOR_SIZE;
765static int sdeb_tur_ms_to_ready = DEF_TUR_MS_TO_READY;
766static int sdebug_virtual_gb = DEF_VIRTUAL_GB;
767static int sdebug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
768static unsigned int sdebug_lbpu = DEF_LBPU;
769static unsigned int sdebug_lbpws = DEF_LBPWS;
770static unsigned int sdebug_lbpws10 = DEF_LBPWS10;
771static unsigned int sdebug_lbprz = DEF_LBPRZ;
772static unsigned int sdebug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
773static unsigned int sdebug_unmap_granularity = DEF_UNMAP_GRANULARITY;
774static unsigned int sdebug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
775static unsigned int sdebug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
776static unsigned int sdebug_write_same_length = DEF_WRITESAME_LENGTH;
777static int sdebug_uuid_ctl = DEF_UUID_CTL;
778static bool sdebug_random = DEF_RANDOM;
779static bool sdebug_per_host_store = DEF_PER_HOST_STORE;
780static bool sdebug_removable = DEF_REMOVABLE;
781static bool sdebug_clustering;
782static bool sdebug_host_lock = DEF_HOST_LOCK;
783static bool sdebug_strict = DEF_STRICT;
784static bool sdebug_any_injecting_opt;
785static bool sdebug_verbose;
786static bool have_dif_prot;
787static bool write_since_sync;
788static bool sdebug_statistics = DEF_STATISTICS;
789static bool sdebug_wp;
790/* Following enum: 0: no zbc, def; 1: host aware; 2: host managed */
791static enum blk_zoned_model sdeb_zbc_model = BLK_ZONED_NONE;
792static char *sdeb_zbc_model_s;
793
794static unsigned int sdebug_store_sectors;
795static sector_t sdebug_capacity; /* in sectors */
796
797/* old BIOS stuff, kernel may get rid of them but some mode sense pages
798 may still need them */
799static int sdebug_heads; /* heads per disk */
800static int sdebug_cylinders_per; /* cylinders per surface */
801static int sdebug_sectors_per; /* sectors per cylinder */
802
803static LIST_HEAD(sdebug_host_list);
804static DEFINE_SPINLOCK(sdebug_host_list_lock);
805
806static struct xarray per_store_arr;
807static struct xarray *per_store_ap = &per_store_arr;
808static int sdeb_first_idx = -1; /* invalid index ==> none created */
809static int sdeb_most_recent_idx = -1;
810static DEFINE_RWLOCK(sdeb_fake_rw_lck); /* need a RW lock when fake_rw=1 */
811
812static unsigned long map_size;
813static int num_aborts;
814static int num_dev_resets;
815static int num_target_resets;
816static int num_bus_resets;
817static int num_host_resets;
818static int dix_writes;
819static int dix_reads;
820static int dif_errors;
821
822/* ZBC global data */
823static bool sdeb_zbc_in_use; /* true for host-aware and host-managed disks */
824static int sdeb_zbc_zone_size_mb;
825static int sdeb_zbc_max_open = DEF_ZBC_MAX_OPEN_ZONES;
826static int sdeb_zbc_nr_conv = DEF_ZBC_NR_CONV_ZONES;
827
828static int submit_queues = DEF_SUBMIT_QUEUES; /* > 1 for multi-queue (mq) */
829static struct sdebug_queue *sdebug_q_arr; /* ptr to array of submit queues */
830
831static DEFINE_RWLOCK(atomic_rw);
832static DEFINE_RWLOCK(atomic_rw2);
833
834static rwlock_t *ramdisk_lck_a[2];
835
836static char sdebug_proc_name[] = MY_NAME;
837static const char *my_name = MY_NAME;
838
839static struct bus_type pseudo_lld_bus;
840
841static struct device_driver sdebug_driverfs_driver = {
842 .name = sdebug_proc_name,
843 .bus = &pseudo_lld_bus,
844};
845
846static const int check_condition_result =
847 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
848
849static const int illegal_condition_result =
850 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
851
852static const int device_qfull_result =
853 (DID_OK << 16) | (COMMAND_COMPLETE << 8) | SAM_STAT_TASK_SET_FULL;
854
855static const int condition_met_result = SAM_STAT_CONDITION_MET;
856
857
858/* Only do the extra work involved in logical block provisioning if one or
859 * more of the lbpu, lbpws or lbpws10 parameters are given and we are doing
860 * real reads and writes (i.e. not skipping them for speed).
861 */
862static inline bool scsi_debug_lbp(void)
863{
864 return 0 == sdebug_fake_rw &&
865 (sdebug_lbpu || sdebug_lbpws || sdebug_lbpws10);
866}
867
868static void *lba2fake_store(struct sdeb_store_info *sip,
869 unsigned long long lba)
870{
871 struct sdeb_store_info *lsip = sip;
872
873 lba = do_div(lba, sdebug_store_sectors);
874 if (!sip || !sip->storep) {
875 WARN_ON_ONCE(true);
876 lsip = xa_load(per_store_ap, 0); /* should never be NULL */
877 }
878 return lsip->storep + lba * sdebug_sector_size;
879}
880
881static struct t10_pi_tuple *dif_store(struct sdeb_store_info *sip,
882 sector_t sector)
883{
884 sector = sector_div(sector, sdebug_store_sectors);
885
886 return sip->dif_storep + sector;
887}
888
889static void sdebug_max_tgts_luns(void)
890{
891 struct sdebug_host_info *sdbg_host;
892 struct Scsi_Host *hpnt;
893
894 spin_lock(&sdebug_host_list_lock);
895 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
896 hpnt = sdbg_host->shost;
897 if ((hpnt->this_id >= 0) &&
898 (sdebug_num_tgts > hpnt->this_id))
899 hpnt->max_id = sdebug_num_tgts + 1;
900 else
901 hpnt->max_id = sdebug_num_tgts;
902 /* sdebug_max_luns; */
903 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
904 }
905 spin_unlock(&sdebug_host_list_lock);
906}
907
908enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
909
910/* Set in_bit to -1 to indicate no bit position of invalid field */
911static void mk_sense_invalid_fld(struct scsi_cmnd *scp,
912 enum sdeb_cmd_data c_d,
913 int in_byte, int in_bit)
914{
915 unsigned char *sbuff;
916 u8 sks[4];
917 int sl, asc;
918
919 sbuff = scp->sense_buffer;
920 if (!sbuff) {
921 sdev_printk(KERN_ERR, scp->device,
922 "%s: sense_buffer is NULL\n", __func__);
923 return;
924 }
925 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
926 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
927 scsi_build_sense_buffer(sdebug_dsense, sbuff, ILLEGAL_REQUEST, asc, 0);
928 memset(sks, 0, sizeof(sks));
929 sks[0] = 0x80;
930 if (c_d)
931 sks[0] |= 0x40;
932 if (in_bit >= 0) {
933 sks[0] |= 0x8;
934 sks[0] |= 0x7 & in_bit;
935 }
936 put_unaligned_be16(in_byte, sks + 1);
937 if (sdebug_dsense) {
938 sl = sbuff[7] + 8;
939 sbuff[7] = sl;
940 sbuff[sl] = 0x2;
941 sbuff[sl + 1] = 0x6;
942 memcpy(sbuff + sl + 4, sks, 3);
943 } else
944 memcpy(sbuff + 15, sks, 3);
945 if (sdebug_verbose)
946 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
947 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
948 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
949}
950
951static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
952{
953 unsigned char *sbuff;
954
955 sbuff = scp->sense_buffer;
956 if (!sbuff) {
957 sdev_printk(KERN_ERR, scp->device,
958 "%s: sense_buffer is NULL\n", __func__);
959 return;
960 }
961 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
962
963 scsi_build_sense_buffer(sdebug_dsense, sbuff, key, asc, asq);
964
965 if (sdebug_verbose)
966 sdev_printk(KERN_INFO, scp->device,
967 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
968 my_name, key, asc, asq);
969}
970
971static void mk_sense_invalid_opcode(struct scsi_cmnd *scp)
972{
973 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
974}
975
976static int scsi_debug_ioctl(struct scsi_device *dev, unsigned int cmd,
977 void __user *arg)
978{
979 if (sdebug_verbose) {
980 if (0x1261 == cmd)
981 sdev_printk(KERN_INFO, dev,
982 "%s: BLKFLSBUF [0x1261]\n", __func__);
983 else if (0x5331 == cmd)
984 sdev_printk(KERN_INFO, dev,
985 "%s: CDROM_GET_CAPABILITY [0x5331]\n",
986 __func__);
987 else
988 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
989 __func__, cmd);
990 }
991 return -EINVAL;
992 /* return -ENOTTY; // correct return but upsets fdisk */
993}
994
995static void config_cdb_len(struct scsi_device *sdev)
996{
997 switch (sdebug_cdb_len) {
998 case 6: /* suggest 6 byte READ, WRITE and MODE SENSE/SELECT */
999 sdev->use_10_for_rw = false;
1000 sdev->use_16_for_rw = false;
1001 sdev->use_10_for_ms = false;
1002 break;
1003 case 10: /* suggest 10 byte RWs and 6 byte MODE SENSE/SELECT */
1004 sdev->use_10_for_rw = true;
1005 sdev->use_16_for_rw = false;
1006 sdev->use_10_for_ms = false;
1007 break;
1008 case 12: /* suggest 10 byte RWs and 10 byte MODE SENSE/SELECT */
1009 sdev->use_10_for_rw = true;
1010 sdev->use_16_for_rw = false;
1011 sdev->use_10_for_ms = true;
1012 break;
1013 case 16:
1014 sdev->use_10_for_rw = false;
1015 sdev->use_16_for_rw = true;
1016 sdev->use_10_for_ms = true;
1017 break;
1018 case 32: /* No knobs to suggest this so same as 16 for now */
1019 sdev->use_10_for_rw = false;
1020 sdev->use_16_for_rw = true;
1021 sdev->use_10_for_ms = true;
1022 break;
1023 default:
1024 pr_warn("unexpected cdb_len=%d, force to 10\n",
1025 sdebug_cdb_len);
1026 sdev->use_10_for_rw = true;
1027 sdev->use_16_for_rw = false;
1028 sdev->use_10_for_ms = false;
1029 sdebug_cdb_len = 10;
1030 break;
1031 }
1032}
1033
1034static void all_config_cdb_len(void)
1035{
1036 struct sdebug_host_info *sdbg_host;
1037 struct Scsi_Host *shost;
1038 struct scsi_device *sdev;
1039
1040 spin_lock(&sdebug_host_list_lock);
1041 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
1042 shost = sdbg_host->shost;
1043 shost_for_each_device(sdev, shost) {
1044 config_cdb_len(sdev);
1045 }
1046 }
1047 spin_unlock(&sdebug_host_list_lock);
1048}
1049
1050static void clear_luns_changed_on_target(struct sdebug_dev_info *devip)
1051{
1052 struct sdebug_host_info *sdhp;
1053 struct sdebug_dev_info *dp;
1054
1055 spin_lock(&sdebug_host_list_lock);
1056 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
1057 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
1058 if ((devip->sdbg_host == dp->sdbg_host) &&
1059 (devip->target == dp->target))
1060 clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
1061 }
1062 }
1063 spin_unlock(&sdebug_host_list_lock);
1064}
1065
1066static int make_ua(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1067{
1068 int k;
1069
1070 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
1071 if (k != SDEBUG_NUM_UAS) {
1072 const char *cp = NULL;
1073
1074 switch (k) {
1075 case SDEBUG_UA_POR:
1076 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
1077 POWER_ON_RESET_ASCQ);
1078 if (sdebug_verbose)
1079 cp = "power on reset";
1080 break;
1081 case SDEBUG_UA_BUS_RESET:
1082 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
1083 BUS_RESET_ASCQ);
1084 if (sdebug_verbose)
1085 cp = "bus reset";
1086 break;
1087 case SDEBUG_UA_MODE_CHANGED:
1088 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
1089 MODE_CHANGED_ASCQ);
1090 if (sdebug_verbose)
1091 cp = "mode parameters changed";
1092 break;
1093 case SDEBUG_UA_CAPACITY_CHANGED:
1094 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
1095 CAPACITY_CHANGED_ASCQ);
1096 if (sdebug_verbose)
1097 cp = "capacity data changed";
1098 break;
1099 case SDEBUG_UA_MICROCODE_CHANGED:
1100 mk_sense_buffer(scp, UNIT_ATTENTION,
1101 TARGET_CHANGED_ASC,
1102 MICROCODE_CHANGED_ASCQ);
1103 if (sdebug_verbose)
1104 cp = "microcode has been changed";
1105 break;
1106 case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET:
1107 mk_sense_buffer(scp, UNIT_ATTENTION,
1108 TARGET_CHANGED_ASC,
1109 MICROCODE_CHANGED_WO_RESET_ASCQ);
1110 if (sdebug_verbose)
1111 cp = "microcode has been changed without reset";
1112 break;
1113 case SDEBUG_UA_LUNS_CHANGED:
1114 /*
1115 * SPC-3 behavior is to report a UNIT ATTENTION with
1116 * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN
1117 * on the target, until a REPORT LUNS command is
1118 * received. SPC-4 behavior is to report it only once.
1119 * NOTE: sdebug_scsi_level does not use the same
1120 * values as struct scsi_device->scsi_level.
1121 */
1122 if (sdebug_scsi_level >= 6) /* SPC-4 and above */
1123 clear_luns_changed_on_target(devip);
1124 mk_sense_buffer(scp, UNIT_ATTENTION,
1125 TARGET_CHANGED_ASC,
1126 LUNS_CHANGED_ASCQ);
1127 if (sdebug_verbose)
1128 cp = "reported luns data has changed";
1129 break;
1130 default:
1131 pr_warn("unexpected unit attention code=%d\n", k);
1132 if (sdebug_verbose)
1133 cp = "unknown";
1134 break;
1135 }
1136 clear_bit(k, devip->uas_bm);
1137 if (sdebug_verbose)
1138 sdev_printk(KERN_INFO, scp->device,
1139 "%s reports: Unit attention: %s\n",
1140 my_name, cp);
1141 return check_condition_result;
1142 }
1143 return 0;
1144}
1145
1146/* Build SCSI "data-in" buffer. Returns 0 if ok else (DID_ERROR << 16). */
1147static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1148 int arr_len)
1149{
1150 int act_len;
1151 struct scsi_data_buffer *sdb = &scp->sdb;
1152
1153 if (!sdb->length)
1154 return 0;
1155 if (scp->sc_data_direction != DMA_FROM_DEVICE)
1156 return DID_ERROR << 16;
1157
1158 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
1159 arr, arr_len);
1160 scsi_set_resid(scp, scsi_bufflen(scp) - act_len);
1161
1162 return 0;
1163}
1164
1165/* Partial build of SCSI "data-in" buffer. Returns 0 if ok else
1166 * (DID_ERROR << 16). Can write to offset in data-in buffer. If multiple
1167 * calls, not required to write in ascending offset order. Assumes resid
1168 * set to scsi_bufflen() prior to any calls.
1169 */
1170static int p_fill_from_dev_buffer(struct scsi_cmnd *scp, const void *arr,
1171 int arr_len, unsigned int off_dst)
1172{
1173 unsigned int act_len, n;
1174 struct scsi_data_buffer *sdb = &scp->sdb;
1175 off_t skip = off_dst;
1176
1177 if (sdb->length <= off_dst)
1178 return 0;
1179 if (scp->sc_data_direction != DMA_FROM_DEVICE)
1180 return DID_ERROR << 16;
1181
1182 act_len = sg_pcopy_from_buffer(sdb->table.sgl, sdb->table.nents,
1183 arr, arr_len, skip);
1184 pr_debug("%s: off_dst=%u, scsi_bufflen=%u, act_len=%u, resid=%d\n",
1185 __func__, off_dst, scsi_bufflen(scp), act_len,
1186 scsi_get_resid(scp));
1187 n = scsi_bufflen(scp) - (off_dst + act_len);
1188 scsi_set_resid(scp, min_t(int, scsi_get_resid(scp), n));
1189 return 0;
1190}
1191
1192/* Fetches from SCSI "data-out" buffer. Returns number of bytes fetched into
1193 * 'arr' or -1 if error.
1194 */
1195static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1196 int arr_len)
1197{
1198 if (!scsi_bufflen(scp))
1199 return 0;
1200 if (scp->sc_data_direction != DMA_TO_DEVICE)
1201 return -1;
1202
1203 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
1204}
1205
1206
1207static char sdebug_inq_vendor_id[9] = "Linux ";
1208static char sdebug_inq_product_id[17] = "scsi_debug ";
1209static char sdebug_inq_product_rev[5] = SDEBUG_VERSION;
1210/* Use some locally assigned NAAs for SAS addresses. */
1211static const u64 naa3_comp_a = 0x3222222000000000ULL;
1212static const u64 naa3_comp_b = 0x3333333000000000ULL;
1213static const u64 naa3_comp_c = 0x3111111000000000ULL;
1214
1215/* Device identification VPD page. Returns number of bytes placed in arr */
1216static int inquiry_vpd_83(unsigned char *arr, int port_group_id,
1217 int target_dev_id, int dev_id_num,
1218 const char *dev_id_str, int dev_id_str_len,
1219 const uuid_t *lu_name)
1220{
1221 int num, port_a;
1222 char b[32];
1223
1224 port_a = target_dev_id + 1;
1225 /* T10 vendor identifier field format (faked) */
1226 arr[0] = 0x2; /* ASCII */
1227 arr[1] = 0x1;
1228 arr[2] = 0x0;
1229 memcpy(&arr[4], sdebug_inq_vendor_id, 8);
1230 memcpy(&arr[12], sdebug_inq_product_id, 16);
1231 memcpy(&arr[28], dev_id_str, dev_id_str_len);
1232 num = 8 + 16 + dev_id_str_len;
1233 arr[3] = num;
1234 num += 4;
1235 if (dev_id_num >= 0) {
1236 if (sdebug_uuid_ctl) {
1237 /* Locally assigned UUID */
1238 arr[num++] = 0x1; /* binary (not necessarily sas) */
1239 arr[num++] = 0xa; /* PIV=0, lu, naa */
1240 arr[num++] = 0x0;
1241 arr[num++] = 0x12;
1242 arr[num++] = 0x10; /* uuid type=1, locally assigned */
1243 arr[num++] = 0x0;
1244 memcpy(arr + num, lu_name, 16);
1245 num += 16;
1246 } else {
1247 /* NAA-3, Logical unit identifier (binary) */
1248 arr[num++] = 0x1; /* binary (not necessarily sas) */
1249 arr[num++] = 0x3; /* PIV=0, lu, naa */
1250 arr[num++] = 0x0;
1251 arr[num++] = 0x8;
1252 put_unaligned_be64(naa3_comp_b + dev_id_num, arr + num);
1253 num += 8;
1254 }
1255 /* Target relative port number */
1256 arr[num++] = 0x61; /* proto=sas, binary */
1257 arr[num++] = 0x94; /* PIV=1, target port, rel port */
1258 arr[num++] = 0x0; /* reserved */
1259 arr[num++] = 0x4; /* length */
1260 arr[num++] = 0x0; /* reserved */
1261 arr[num++] = 0x0; /* reserved */
1262 arr[num++] = 0x0;
1263 arr[num++] = 0x1; /* relative port A */
1264 }
1265 /* NAA-3, Target port identifier */
1266 arr[num++] = 0x61; /* proto=sas, binary */
1267 arr[num++] = 0x93; /* piv=1, target port, naa */
1268 arr[num++] = 0x0;
1269 arr[num++] = 0x8;
1270 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1271 num += 8;
1272 /* NAA-3, Target port group identifier */
1273 arr[num++] = 0x61; /* proto=sas, binary */
1274 arr[num++] = 0x95; /* piv=1, target port group id */
1275 arr[num++] = 0x0;
1276 arr[num++] = 0x4;
1277 arr[num++] = 0;
1278 arr[num++] = 0;
1279 put_unaligned_be16(port_group_id, arr + num);
1280 num += 2;
1281 /* NAA-3, Target device identifier */
1282 arr[num++] = 0x61; /* proto=sas, binary */
1283 arr[num++] = 0xa3; /* piv=1, target device, naa */
1284 arr[num++] = 0x0;
1285 arr[num++] = 0x8;
1286 put_unaligned_be64(naa3_comp_a + target_dev_id, arr + num);
1287 num += 8;
1288 /* SCSI name string: Target device identifier */
1289 arr[num++] = 0x63; /* proto=sas, UTF-8 */
1290 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
1291 arr[num++] = 0x0;
1292 arr[num++] = 24;
1293 memcpy(arr + num, "naa.32222220", 12);
1294 num += 12;
1295 snprintf(b, sizeof(b), "%08X", target_dev_id);
1296 memcpy(arr + num, b, 8);
1297 num += 8;
1298 memset(arr + num, 0, 4);
1299 num += 4;
1300 return num;
1301}
1302
1303static unsigned char vpd84_data[] = {
1304/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
1305 0x22,0x22,0x22,0x0,0xbb,0x1,
1306 0x22,0x22,0x22,0x0,0xbb,0x2,
1307};
1308
1309/* Software interface identification VPD page */
1310static int inquiry_vpd_84(unsigned char *arr)
1311{
1312 memcpy(arr, vpd84_data, sizeof(vpd84_data));
1313 return sizeof(vpd84_data);
1314}
1315
1316/* Management network addresses VPD page */
1317static int inquiry_vpd_85(unsigned char *arr)
1318{
1319 int num = 0;
1320 const char *na1 = "https://www.kernel.org/config";
1321 const char *na2 = "http://www.kernel.org/log";
1322 int plen, olen;
1323
1324 arr[num++] = 0x1; /* lu, storage config */
1325 arr[num++] = 0x0; /* reserved */
1326 arr[num++] = 0x0;
1327 olen = strlen(na1);
1328 plen = olen + 1;
1329 if (plen % 4)
1330 plen = ((plen / 4) + 1) * 4;
1331 arr[num++] = plen; /* length, null termianted, padded */
1332 memcpy(arr + num, na1, olen);
1333 memset(arr + num + olen, 0, plen - olen);
1334 num += plen;
1335
1336 arr[num++] = 0x4; /* lu, logging */
1337 arr[num++] = 0x0; /* reserved */
1338 arr[num++] = 0x0;
1339 olen = strlen(na2);
1340 plen = olen + 1;
1341 if (plen % 4)
1342 plen = ((plen / 4) + 1) * 4;
1343 arr[num++] = plen; /* length, null terminated, padded */
1344 memcpy(arr + num, na2, olen);
1345 memset(arr + num + olen, 0, plen - olen);
1346 num += plen;
1347
1348 return num;
1349}
1350
1351/* SCSI ports VPD page */
1352static int inquiry_vpd_88(unsigned char *arr, int target_dev_id)
1353{
1354 int num = 0;
1355 int port_a, port_b;
1356
1357 port_a = target_dev_id + 1;
1358 port_b = port_a + 1;
1359 arr[num++] = 0x0; /* reserved */
1360 arr[num++] = 0x0; /* reserved */
1361 arr[num++] = 0x0;
1362 arr[num++] = 0x1; /* relative port 1 (primary) */
1363 memset(arr + num, 0, 6);
1364 num += 6;
1365 arr[num++] = 0x0;
1366 arr[num++] = 12; /* length tp descriptor */
1367 /* naa-5 target port identifier (A) */
1368 arr[num++] = 0x61; /* proto=sas, binary */
1369 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1370 arr[num++] = 0x0; /* reserved */
1371 arr[num++] = 0x8; /* length */
1372 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1373 num += 8;
1374 arr[num++] = 0x0; /* reserved */
1375 arr[num++] = 0x0; /* reserved */
1376 arr[num++] = 0x0;
1377 arr[num++] = 0x2; /* relative port 2 (secondary) */
1378 memset(arr + num, 0, 6);
1379 num += 6;
1380 arr[num++] = 0x0;
1381 arr[num++] = 12; /* length tp descriptor */
1382 /* naa-5 target port identifier (B) */
1383 arr[num++] = 0x61; /* proto=sas, binary */
1384 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1385 arr[num++] = 0x0; /* reserved */
1386 arr[num++] = 0x8; /* length */
1387 put_unaligned_be64(naa3_comp_a + port_b, arr + num);
1388 num += 8;
1389
1390 return num;
1391}
1392
1393
1394static unsigned char vpd89_data[] = {
1395/* from 4th byte */ 0,0,0,0,
1396'l','i','n','u','x',' ',' ',' ',
1397'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
1398'1','2','3','4',
13990x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
14000xec,0,0,0,
14010x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
14020,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
14030x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
14040x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
14050x53,0x41,
14060x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
14070x20,0x20,
14080x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
14090x10,0x80,
14100,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
14110x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
14120x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
14130,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
14140x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
14150x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
14160,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
14170,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14180,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14190,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14200x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
14210,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
14220xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
14230,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
14240,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14250,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14260,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14270,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14280,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14290,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14300,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14310,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14320,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14330,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14340,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14350,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
1436};
1437
1438/* ATA Information VPD page */
1439static int inquiry_vpd_89(unsigned char *arr)
1440{
1441 memcpy(arr, vpd89_data, sizeof(vpd89_data));
1442 return sizeof(vpd89_data);
1443}
1444
1445
1446static unsigned char vpdb0_data[] = {
1447 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
1448 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1449 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1450 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1451};
1452
1453/* Block limits VPD page (SBC-3) */
1454static int inquiry_vpd_b0(unsigned char *arr)
1455{
1456 unsigned int gran;
1457
1458 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
1459
1460 /* Optimal transfer length granularity */
1461 if (sdebug_opt_xferlen_exp != 0 &&
1462 sdebug_physblk_exp < sdebug_opt_xferlen_exp)
1463 gran = 1 << sdebug_opt_xferlen_exp;
1464 else
1465 gran = 1 << sdebug_physblk_exp;
1466 put_unaligned_be16(gran, arr + 2);
1467
1468 /* Maximum Transfer Length */
1469 if (sdebug_store_sectors > 0x400)
1470 put_unaligned_be32(sdebug_store_sectors, arr + 4);
1471
1472 /* Optimal Transfer Length */
1473 put_unaligned_be32(sdebug_opt_blks, &arr[8]);
1474
1475 if (sdebug_lbpu) {
1476 /* Maximum Unmap LBA Count */
1477 put_unaligned_be32(sdebug_unmap_max_blocks, &arr[16]);
1478
1479 /* Maximum Unmap Block Descriptor Count */
1480 put_unaligned_be32(sdebug_unmap_max_desc, &arr[20]);
1481 }
1482
1483 /* Unmap Granularity Alignment */
1484 if (sdebug_unmap_alignment) {
1485 put_unaligned_be32(sdebug_unmap_alignment, &arr[28]);
1486 arr[28] |= 0x80; /* UGAVALID */
1487 }
1488
1489 /* Optimal Unmap Granularity */
1490 put_unaligned_be32(sdebug_unmap_granularity, &arr[24]);
1491
1492 /* Maximum WRITE SAME Length */
1493 put_unaligned_be64(sdebug_write_same_length, &arr[32]);
1494
1495 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
1496
1497 return sizeof(vpdb0_data);
1498}
1499
1500/* Block device characteristics VPD page (SBC-3) */
1501static int inquiry_vpd_b1(struct sdebug_dev_info *devip, unsigned char *arr)
1502{
1503 memset(arr, 0, 0x3c);
1504 arr[0] = 0;
1505 arr[1] = 1; /* non rotating medium (e.g. solid state) */
1506 arr[2] = 0;
1507 arr[3] = 5; /* less than 1.8" */
1508 if (devip->zmodel == BLK_ZONED_HA)
1509 arr[4] = 1 << 4; /* zoned field = 01b */
1510
1511 return 0x3c;
1512}
1513
1514/* Logical block provisioning VPD page (SBC-4) */
1515static int inquiry_vpd_b2(unsigned char *arr)
1516{
1517 memset(arr, 0, 0x4);
1518 arr[0] = 0; /* threshold exponent */
1519 if (sdebug_lbpu)
1520 arr[1] = 1 << 7;
1521 if (sdebug_lbpws)
1522 arr[1] |= 1 << 6;
1523 if (sdebug_lbpws10)
1524 arr[1] |= 1 << 5;
1525 if (sdebug_lbprz && scsi_debug_lbp())
1526 arr[1] |= (sdebug_lbprz & 0x7) << 2; /* sbc4r07 and later */
1527 /* anc_sup=0; dp=0 (no provisioning group descriptor) */
1528 /* minimum_percentage=0; provisioning_type=0 (unknown) */
1529 /* threshold_percentage=0 */
1530 return 0x4;
1531}
1532
1533/* Zoned block device characteristics VPD page (ZBC mandatory) */
1534static int inquiry_vpd_b6(struct sdebug_dev_info *devip, unsigned char *arr)
1535{
1536 memset(arr, 0, 0x3c);
1537 arr[0] = 0x1; /* set URSWRZ (unrestricted read in seq. wr req zone) */
1538 /*
1539 * Set Optimal number of open sequential write preferred zones and
1540 * Optimal number of non-sequentially written sequential write
1541 * preferred zones fields to 'not reported' (0xffffffff). Leave other
1542 * fields set to zero, apart from Max. number of open swrz_s field.
1543 */
1544 put_unaligned_be32(0xffffffff, &arr[4]);
1545 put_unaligned_be32(0xffffffff, &arr[8]);
1546 if (sdeb_zbc_model == BLK_ZONED_HM && devip->max_open)
1547 put_unaligned_be32(devip->max_open, &arr[12]);
1548 else
1549 put_unaligned_be32(0xffffffff, &arr[12]);
1550 return 0x3c;
1551}
1552
1553#define SDEBUG_LONG_INQ_SZ 96
1554#define SDEBUG_MAX_INQ_ARR_SZ 584
1555
1556static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1557{
1558 unsigned char pq_pdt;
1559 unsigned char *arr;
1560 unsigned char *cmd = scp->cmnd;
1561 int alloc_len, n, ret;
1562 bool have_wlun, is_disk, is_zbc, is_disk_zbc;
1563
1564 alloc_len = get_unaligned_be16(cmd + 3);
1565 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
1566 if (! arr)
1567 return DID_REQUEUE << 16;
1568 is_disk = (sdebug_ptype == TYPE_DISK);
1569 is_zbc = (devip->zmodel != BLK_ZONED_NONE);
1570 is_disk_zbc = (is_disk || is_zbc);
1571 have_wlun = scsi_is_wlun(scp->device->lun);
1572 if (have_wlun)
1573 pq_pdt = TYPE_WLUN; /* present, wlun */
1574 else if (sdebug_no_lun_0 && (devip->lun == SDEBUG_LUN_0_VAL))
1575 pq_pdt = 0x7f; /* not present, PQ=3, PDT=0x1f */
1576 else
1577 pq_pdt = (sdebug_ptype & 0x1f);
1578 arr[0] = pq_pdt;
1579 if (0x2 & cmd[1]) { /* CMDDT bit set */
1580 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
1581 kfree(arr);
1582 return check_condition_result;
1583 } else if (0x1 & cmd[1]) { /* EVPD bit set */
1584 int lu_id_num, port_group_id, target_dev_id, len;
1585 char lu_id_str[6];
1586 int host_no = devip->sdbg_host->shost->host_no;
1587
1588 port_group_id = (((host_no + 1) & 0x7f) << 8) +
1589 (devip->channel & 0x7f);
1590 if (sdebug_vpd_use_hostno == 0)
1591 host_no = 0;
1592 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) +
1593 (devip->target * 1000) + devip->lun);
1594 target_dev_id = ((host_no + 1) * 2000) +
1595 (devip->target * 1000) - 3;
1596 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
1597 if (0 == cmd[2]) { /* supported vital product data pages */
1598 arr[1] = cmd[2]; /*sanity */
1599 n = 4;
1600 arr[n++] = 0x0; /* this page */
1601 arr[n++] = 0x80; /* unit serial number */
1602 arr[n++] = 0x83; /* device identification */
1603 arr[n++] = 0x84; /* software interface ident. */
1604 arr[n++] = 0x85; /* management network addresses */
1605 arr[n++] = 0x86; /* extended inquiry */
1606 arr[n++] = 0x87; /* mode page policy */
1607 arr[n++] = 0x88; /* SCSI ports */
1608 if (is_disk_zbc) { /* SBC or ZBC */
1609 arr[n++] = 0x89; /* ATA information */
1610 arr[n++] = 0xb0; /* Block limits */
1611 arr[n++] = 0xb1; /* Block characteristics */
1612 if (is_disk)
1613 arr[n++] = 0xb2; /* LB Provisioning */
1614 if (is_zbc)
1615 arr[n++] = 0xb6; /* ZB dev. char. */
1616 }
1617 arr[3] = n - 4; /* number of supported VPD pages */
1618 } else if (0x80 == cmd[2]) { /* unit serial number */
1619 arr[1] = cmd[2]; /*sanity */
1620 arr[3] = len;
1621 memcpy(&arr[4], lu_id_str, len);
1622 } else if (0x83 == cmd[2]) { /* device identification */
1623 arr[1] = cmd[2]; /*sanity */
1624 arr[3] = inquiry_vpd_83(&arr[4], port_group_id,
1625 target_dev_id, lu_id_num,
1626 lu_id_str, len,
1627 &devip->lu_name);
1628 } else if (0x84 == cmd[2]) { /* Software interface ident. */
1629 arr[1] = cmd[2]; /*sanity */
1630 arr[3] = inquiry_vpd_84(&arr[4]);
1631 } else if (0x85 == cmd[2]) { /* Management network addresses */
1632 arr[1] = cmd[2]; /*sanity */
1633 arr[3] = inquiry_vpd_85(&arr[4]);
1634 } else if (0x86 == cmd[2]) { /* extended inquiry */
1635 arr[1] = cmd[2]; /*sanity */
1636 arr[3] = 0x3c; /* number of following entries */
1637 if (sdebug_dif == T10_PI_TYPE3_PROTECTION)
1638 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
1639 else if (have_dif_prot)
1640 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
1641 else
1642 arr[4] = 0x0; /* no protection stuff */
1643 arr[5] = 0x7; /* head of q, ordered + simple q's */
1644 } else if (0x87 == cmd[2]) { /* mode page policy */
1645 arr[1] = cmd[2]; /*sanity */
1646 arr[3] = 0x8; /* number of following entries */
1647 arr[4] = 0x2; /* disconnect-reconnect mp */
1648 arr[6] = 0x80; /* mlus, shared */
1649 arr[8] = 0x18; /* protocol specific lu */
1650 arr[10] = 0x82; /* mlus, per initiator port */
1651 } else if (0x88 == cmd[2]) { /* SCSI Ports */
1652 arr[1] = cmd[2]; /*sanity */
1653 arr[3] = inquiry_vpd_88(&arr[4], target_dev_id);
1654 } else if (is_disk_zbc && 0x89 == cmd[2]) { /* ATA info */
1655 arr[1] = cmd[2]; /*sanity */
1656 n = inquiry_vpd_89(&arr[4]);
1657 put_unaligned_be16(n, arr + 2);
1658 } else if (is_disk_zbc && 0xb0 == cmd[2]) { /* Block limits */
1659 arr[1] = cmd[2]; /*sanity */
1660 arr[3] = inquiry_vpd_b0(&arr[4]);
1661 } else if (is_disk_zbc && 0xb1 == cmd[2]) { /* Block char. */
1662 arr[1] = cmd[2]; /*sanity */
1663 arr[3] = inquiry_vpd_b1(devip, &arr[4]);
1664 } else if (is_disk && 0xb2 == cmd[2]) { /* LB Prov. */
1665 arr[1] = cmd[2]; /*sanity */
1666 arr[3] = inquiry_vpd_b2(&arr[4]);
1667 } else if (is_zbc && cmd[2] == 0xb6) { /* ZB dev. charact. */
1668 arr[1] = cmd[2]; /*sanity */
1669 arr[3] = inquiry_vpd_b6(devip, &arr[4]);
1670 } else {
1671 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
1672 kfree(arr);
1673 return check_condition_result;
1674 }
1675 len = min(get_unaligned_be16(arr + 2) + 4, alloc_len);
1676 ret = fill_from_dev_buffer(scp, arr,
1677 min(len, SDEBUG_MAX_INQ_ARR_SZ));
1678 kfree(arr);
1679 return ret;
1680 }
1681 /* drops through here for a standard inquiry */
1682 arr[1] = sdebug_removable ? 0x80 : 0; /* Removable disk */
1683 arr[2] = sdebug_scsi_level;
1684 arr[3] = 2; /* response_data_format==2 */
1685 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
1686 arr[5] = (int)have_dif_prot; /* PROTECT bit */
1687 if (sdebug_vpd_use_hostno == 0)
1688 arr[5] |= 0x10; /* claim: implicit TPGS */
1689 arr[6] = 0x10; /* claim: MultiP */
1690 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
1691 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
1692 memcpy(&arr[8], sdebug_inq_vendor_id, 8);
1693 memcpy(&arr[16], sdebug_inq_product_id, 16);
1694 memcpy(&arr[32], sdebug_inq_product_rev, 4);
1695 /* Use Vendor Specific area to place driver date in ASCII hex */
1696 memcpy(&arr[36], sdebug_version_date, 8);
1697 /* version descriptors (2 bytes each) follow */
1698 put_unaligned_be16(0xc0, arr + 58); /* SAM-6 no version claimed */
1699 put_unaligned_be16(0x5c0, arr + 60); /* SPC-5 no version claimed */
1700 n = 62;
1701 if (is_disk) { /* SBC-4 no version claimed */
1702 put_unaligned_be16(0x600, arr + n);
1703 n += 2;
1704 } else if (sdebug_ptype == TYPE_TAPE) { /* SSC-4 rev 3 */
1705 put_unaligned_be16(0x525, arr + n);
1706 n += 2;
1707 } else if (is_zbc) { /* ZBC BSR INCITS 536 revision 05 */
1708 put_unaligned_be16(0x624, arr + n);
1709 n += 2;
1710 }
1711 put_unaligned_be16(0x2100, arr + n); /* SPL-4 no version claimed */
1712 ret = fill_from_dev_buffer(scp, arr,
1713 min_t(int, alloc_len, SDEBUG_LONG_INQ_SZ));
1714 kfree(arr);
1715 return ret;
1716}
1717
1718/* See resp_iec_m_pg() for how this data is manipulated */
1719static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1720 0, 0, 0x0, 0x0};
1721
1722static int resp_requests(struct scsi_cmnd *scp,
1723 struct sdebug_dev_info *devip)
1724{
1725 unsigned char *cmd = scp->cmnd;
1726 unsigned char arr[SCSI_SENSE_BUFFERSIZE]; /* assume >= 18 bytes */
1727 bool dsense = !!(cmd[1] & 1);
1728 int alloc_len = cmd[4];
1729 int len = 18;
1730 int stopped_state = atomic_read(&devip->stopped);
1731
1732 memset(arr, 0, sizeof(arr));
1733 if (stopped_state > 0) { /* some "pollable" data [spc6r02: 5.12.2] */
1734 if (dsense) {
1735 arr[0] = 0x72;
1736 arr[1] = NOT_READY;
1737 arr[2] = LOGICAL_UNIT_NOT_READY;
1738 arr[3] = (stopped_state == 2) ? 0x1 : 0x2;
1739 len = 8;
1740 } else {
1741 arr[0] = 0x70;
1742 arr[2] = NOT_READY; /* NO_SENSE in sense_key */
1743 arr[7] = 0xa; /* 18 byte sense buffer */
1744 arr[12] = LOGICAL_UNIT_NOT_READY;
1745 arr[13] = (stopped_state == 2) ? 0x1 : 0x2;
1746 }
1747 } else if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
1748 /* Information exceptions control mode page: TEST=1, MRIE=6 */
1749 if (dsense) {
1750 arr[0] = 0x72;
1751 arr[1] = 0x0; /* NO_SENSE in sense_key */
1752 arr[2] = THRESHOLD_EXCEEDED;
1753 arr[3] = 0xff; /* Failure prediction(false) */
1754 len = 8;
1755 } else {
1756 arr[0] = 0x70;
1757 arr[2] = 0x0; /* NO_SENSE in sense_key */
1758 arr[7] = 0xa; /* 18 byte sense buffer */
1759 arr[12] = THRESHOLD_EXCEEDED;
1760 arr[13] = 0xff; /* Failure prediction(false) */
1761 }
1762 } else { /* nothing to report */
1763 if (dsense) {
1764 len = 8;
1765 memset(arr, 0, len);
1766 arr[0] = 0x72;
1767 } else {
1768 memset(arr, 0, len);
1769 arr[0] = 0x70;
1770 arr[7] = 0xa;
1771 }
1772 }
1773 return fill_from_dev_buffer(scp, arr, min_t(int, len, alloc_len));
1774}
1775
1776static int resp_start_stop(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1777{
1778 unsigned char *cmd = scp->cmnd;
1779 int power_cond, want_stop, stopped_state;
1780 bool changing;
1781
1782 power_cond = (cmd[4] & 0xf0) >> 4;
1783 if (power_cond) {
1784 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
1785 return check_condition_result;
1786 }
1787 want_stop = !(cmd[4] & 1);
1788 stopped_state = atomic_read(&devip->stopped);
1789 if (stopped_state == 2) {
1790 ktime_t now_ts = ktime_get_boottime();
1791
1792 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) {
1793 u64 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts));
1794
1795 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) {
1796 /* tur_ms_to_ready timer extinguished */
1797 atomic_set(&devip->stopped, 0);
1798 stopped_state = 0;
1799 }
1800 }
1801 if (stopped_state == 2) {
1802 if (want_stop) {
1803 stopped_state = 1; /* dummy up success */
1804 } else { /* Disallow tur_ms_to_ready delay to be overridden */
1805 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 0 /* START bit */);
1806 return check_condition_result;
1807 }
1808 }
1809 }
1810 changing = (stopped_state != want_stop);
1811 if (changing)
1812 atomic_xchg(&devip->stopped, want_stop);
1813 if (!changing || (cmd[1] & 0x1)) /* state unchanged or IMMED bit set in cdb */
1814 return SDEG_RES_IMMED_MASK;
1815 else
1816 return 0;
1817}
1818
1819static sector_t get_sdebug_capacity(void)
1820{
1821 static const unsigned int gibibyte = 1073741824;
1822
1823 if (sdebug_virtual_gb > 0)
1824 return (sector_t)sdebug_virtual_gb *
1825 (gibibyte / sdebug_sector_size);
1826 else
1827 return sdebug_store_sectors;
1828}
1829
1830#define SDEBUG_READCAP_ARR_SZ 8
1831static int resp_readcap(struct scsi_cmnd *scp,
1832 struct sdebug_dev_info *devip)
1833{
1834 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
1835 unsigned int capac;
1836
1837 /* following just in case virtual_gb changed */
1838 sdebug_capacity = get_sdebug_capacity();
1839 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
1840 if (sdebug_capacity < 0xffffffff) {
1841 capac = (unsigned int)sdebug_capacity - 1;
1842 put_unaligned_be32(capac, arr + 0);
1843 } else
1844 put_unaligned_be32(0xffffffff, arr + 0);
1845 put_unaligned_be16(sdebug_sector_size, arr + 6);
1846 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1847}
1848
1849#define SDEBUG_READCAP16_ARR_SZ 32
1850static int resp_readcap16(struct scsi_cmnd *scp,
1851 struct sdebug_dev_info *devip)
1852{
1853 unsigned char *cmd = scp->cmnd;
1854 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
1855 int alloc_len;
1856
1857 alloc_len = get_unaligned_be32(cmd + 10);
1858 /* following just in case virtual_gb changed */
1859 sdebug_capacity = get_sdebug_capacity();
1860 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
1861 put_unaligned_be64((u64)(sdebug_capacity - 1), arr + 0);
1862 put_unaligned_be32(sdebug_sector_size, arr + 8);
1863 arr[13] = sdebug_physblk_exp & 0xf;
1864 arr[14] = (sdebug_lowest_aligned >> 8) & 0x3f;
1865
1866 if (scsi_debug_lbp()) {
1867 arr[14] |= 0x80; /* LBPME */
1868 /* from sbc4r07, this LBPRZ field is 1 bit, but the LBPRZ in
1869 * the LB Provisioning VPD page is 3 bits. Note that lbprz=2
1870 * in the wider field maps to 0 in this field.
1871 */
1872 if (sdebug_lbprz & 1) /* precisely what the draft requires */
1873 arr[14] |= 0x40;
1874 }
1875
1876 arr[15] = sdebug_lowest_aligned & 0xff;
1877
1878 if (have_dif_prot) {
1879 arr[12] = (sdebug_dif - 1) << 1; /* P_TYPE */
1880 arr[12] |= 1; /* PROT_EN */
1881 }
1882
1883 return fill_from_dev_buffer(scp, arr,
1884 min_t(int, alloc_len, SDEBUG_READCAP16_ARR_SZ));
1885}
1886
1887#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1888
1889static int resp_report_tgtpgs(struct scsi_cmnd *scp,
1890 struct sdebug_dev_info *devip)
1891{
1892 unsigned char *cmd = scp->cmnd;
1893 unsigned char *arr;
1894 int host_no = devip->sdbg_host->shost->host_no;
1895 int n, ret, alen, rlen;
1896 int port_group_a, port_group_b, port_a, port_b;
1897
1898 alen = get_unaligned_be32(cmd + 6);
1899 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1900 if (! arr)
1901 return DID_REQUEUE << 16;
1902 /*
1903 * EVPD page 0x88 states we have two ports, one
1904 * real and a fake port with no device connected.
1905 * So we create two port groups with one port each
1906 * and set the group with port B to unavailable.
1907 */
1908 port_a = 0x1; /* relative port A */
1909 port_b = 0x2; /* relative port B */
1910 port_group_a = (((host_no + 1) & 0x7f) << 8) +
1911 (devip->channel & 0x7f);
1912 port_group_b = (((host_no + 1) & 0x7f) << 8) +
1913 (devip->channel & 0x7f) + 0x80;
1914
1915 /*
1916 * The asymmetric access state is cycled according to the host_id.
1917 */
1918 n = 4;
1919 if (sdebug_vpd_use_hostno == 0) {
1920 arr[n++] = host_no % 3; /* Asymm access state */
1921 arr[n++] = 0x0F; /* claim: all states are supported */
1922 } else {
1923 arr[n++] = 0x0; /* Active/Optimized path */
1924 arr[n++] = 0x01; /* only support active/optimized paths */
1925 }
1926 put_unaligned_be16(port_group_a, arr + n);
1927 n += 2;
1928 arr[n++] = 0; /* Reserved */
1929 arr[n++] = 0; /* Status code */
1930 arr[n++] = 0; /* Vendor unique */
1931 arr[n++] = 0x1; /* One port per group */
1932 arr[n++] = 0; /* Reserved */
1933 arr[n++] = 0; /* Reserved */
1934 put_unaligned_be16(port_a, arr + n);
1935 n += 2;
1936 arr[n++] = 3; /* Port unavailable */
1937 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
1938 put_unaligned_be16(port_group_b, arr + n);
1939 n += 2;
1940 arr[n++] = 0; /* Reserved */
1941 arr[n++] = 0; /* Status code */
1942 arr[n++] = 0; /* Vendor unique */
1943 arr[n++] = 0x1; /* One port per group */
1944 arr[n++] = 0; /* Reserved */
1945 arr[n++] = 0; /* Reserved */
1946 put_unaligned_be16(port_b, arr + n);
1947 n += 2;
1948
1949 rlen = n - 4;
1950 put_unaligned_be32(rlen, arr + 0);
1951
1952 /*
1953 * Return the smallest value of either
1954 * - The allocated length
1955 * - The constructed command length
1956 * - The maximum array size
1957 */
1958 rlen = min_t(int, alen, n);
1959 ret = fill_from_dev_buffer(scp, arr,
1960 min_t(int, rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1961 kfree(arr);
1962 return ret;
1963}
1964
1965static int resp_rsup_opcodes(struct scsi_cmnd *scp,
1966 struct sdebug_dev_info *devip)
1967{
1968 bool rctd;
1969 u8 reporting_opts, req_opcode, sdeb_i, supp;
1970 u16 req_sa, u;
1971 u32 alloc_len, a_len;
1972 int k, offset, len, errsts, count, bump, na;
1973 const struct opcode_info_t *oip;
1974 const struct opcode_info_t *r_oip;
1975 u8 *arr;
1976 u8 *cmd = scp->cmnd;
1977
1978 rctd = !!(cmd[2] & 0x80);
1979 reporting_opts = cmd[2] & 0x7;
1980 req_opcode = cmd[3];
1981 req_sa = get_unaligned_be16(cmd + 4);
1982 alloc_len = get_unaligned_be32(cmd + 6);
1983 if (alloc_len < 4 || alloc_len > 0xffff) {
1984 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1985 return check_condition_result;
1986 }
1987 if (alloc_len > 8192)
1988 a_len = 8192;
1989 else
1990 a_len = alloc_len;
1991 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC);
1992 if (NULL == arr) {
1993 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
1994 INSUFF_RES_ASCQ);
1995 return check_condition_result;
1996 }
1997 switch (reporting_opts) {
1998 case 0: /* all commands */
1999 /* count number of commands */
2000 for (count = 0, oip = opcode_info_arr;
2001 oip->num_attached != 0xff; ++oip) {
2002 if (F_INV_OP & oip->flags)
2003 continue;
2004 count += (oip->num_attached + 1);
2005 }
2006 bump = rctd ? 20 : 8;
2007 put_unaligned_be32(count * bump, arr);
2008 for (offset = 4, oip = opcode_info_arr;
2009 oip->num_attached != 0xff && offset < a_len; ++oip) {
2010 if (F_INV_OP & oip->flags)
2011 continue;
2012 na = oip->num_attached;
2013 arr[offset] = oip->opcode;
2014 put_unaligned_be16(oip->sa, arr + offset + 2);
2015 if (rctd)
2016 arr[offset + 5] |= 0x2;
2017 if (FF_SA & oip->flags)
2018 arr[offset + 5] |= 0x1;
2019 put_unaligned_be16(oip->len_mask[0], arr + offset + 6);
2020 if (rctd)
2021 put_unaligned_be16(0xa, arr + offset + 8);
2022 r_oip = oip;
2023 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) {
2024 if (F_INV_OP & oip->flags)
2025 continue;
2026 offset += bump;
2027 arr[offset] = oip->opcode;
2028 put_unaligned_be16(oip->sa, arr + offset + 2);
2029 if (rctd)
2030 arr[offset + 5] |= 0x2;
2031 if (FF_SA & oip->flags)
2032 arr[offset + 5] |= 0x1;
2033 put_unaligned_be16(oip->len_mask[0],
2034 arr + offset + 6);
2035 if (rctd)
2036 put_unaligned_be16(0xa,
2037 arr + offset + 8);
2038 }
2039 oip = r_oip;
2040 offset += bump;
2041 }
2042 break;
2043 case 1: /* one command: opcode only */
2044 case 2: /* one command: opcode plus service action */
2045 case 3: /* one command: if sa==0 then opcode only else opcode+sa */
2046 sdeb_i = opcode_ind_arr[req_opcode];
2047 oip = &opcode_info_arr[sdeb_i];
2048 if (F_INV_OP & oip->flags) {
2049 supp = 1;
2050 offset = 4;
2051 } else {
2052 if (1 == reporting_opts) {
2053 if (FF_SA & oip->flags) {
2054 mk_sense_invalid_fld(scp, SDEB_IN_CDB,
2055 2, 2);
2056 kfree(arr);
2057 return check_condition_result;
2058 }
2059 req_sa = 0;
2060 } else if (2 == reporting_opts &&
2061 0 == (FF_SA & oip->flags)) {
2062 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
2063 kfree(arr); /* point at requested sa */
2064 return check_condition_result;
2065 }
2066 if (0 == (FF_SA & oip->flags) &&
2067 req_opcode == oip->opcode)
2068 supp = 3;
2069 else if (0 == (FF_SA & oip->flags)) {
2070 na = oip->num_attached;
2071 for (k = 0, oip = oip->arrp; k < na;
2072 ++k, ++oip) {
2073 if (req_opcode == oip->opcode)
2074 break;
2075 }
2076 supp = (k >= na) ? 1 : 3;
2077 } else if (req_sa != oip->sa) {
2078 na = oip->num_attached;
2079 for (k = 0, oip = oip->arrp; k < na;
2080 ++k, ++oip) {
2081 if (req_sa == oip->sa)
2082 break;
2083 }
2084 supp = (k >= na) ? 1 : 3;
2085 } else
2086 supp = 3;
2087 if (3 == supp) {
2088 u = oip->len_mask[0];
2089 put_unaligned_be16(u, arr + 2);
2090 arr[4] = oip->opcode;
2091 for (k = 1; k < u; ++k)
2092 arr[4 + k] = (k < 16) ?
2093 oip->len_mask[k] : 0xff;
2094 offset = 4 + u;
2095 } else
2096 offset = 4;
2097 }
2098 arr[1] = (rctd ? 0x80 : 0) | supp;
2099 if (rctd) {
2100 put_unaligned_be16(0xa, arr + offset);
2101 offset += 12;
2102 }
2103 break;
2104 default:
2105 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
2106 kfree(arr);
2107 return check_condition_result;
2108 }
2109 offset = (offset < a_len) ? offset : a_len;
2110 len = (offset < alloc_len) ? offset : alloc_len;
2111 errsts = fill_from_dev_buffer(scp, arr, len);
2112 kfree(arr);
2113 return errsts;
2114}
2115
2116static int resp_rsup_tmfs(struct scsi_cmnd *scp,
2117 struct sdebug_dev_info *devip)
2118{
2119 bool repd;
2120 u32 alloc_len, len;
2121 u8 arr[16];
2122 u8 *cmd = scp->cmnd;
2123
2124 memset(arr, 0, sizeof(arr));
2125 repd = !!(cmd[2] & 0x80);
2126 alloc_len = get_unaligned_be32(cmd + 6);
2127 if (alloc_len < 4) {
2128 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
2129 return check_condition_result;
2130 }
2131 arr[0] = 0xc8; /* ATS | ATSS | LURS */
2132 arr[1] = 0x1; /* ITNRS */
2133 if (repd) {
2134 arr[3] = 0xc;
2135 len = 16;
2136 } else
2137 len = 4;
2138
2139 len = (len < alloc_len) ? len : alloc_len;
2140 return fill_from_dev_buffer(scp, arr, len);
2141}
2142
2143/* <<Following mode page info copied from ST318451LW>> */
2144
2145static int resp_err_recov_pg(unsigned char *p, int pcontrol, int target)
2146{ /* Read-Write Error Recovery page for mode_sense */
2147 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
2148 5, 0, 0xff, 0xff};
2149
2150 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
2151 if (1 == pcontrol)
2152 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
2153 return sizeof(err_recov_pg);
2154}
2155
2156static int resp_disconnect_pg(unsigned char *p, int pcontrol, int target)
2157{ /* Disconnect-Reconnect page for mode_sense */
2158 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
2159 0, 0, 0, 0, 0, 0, 0, 0};
2160
2161 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
2162 if (1 == pcontrol)
2163 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
2164 return sizeof(disconnect_pg);
2165}
2166
2167static int resp_format_pg(unsigned char *p, int pcontrol, int target)
2168{ /* Format device page for mode_sense */
2169 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
2170 0, 0, 0, 0, 0, 0, 0, 0,
2171 0, 0, 0, 0, 0x40, 0, 0, 0};
2172
2173 memcpy(p, format_pg, sizeof(format_pg));
2174 put_unaligned_be16(sdebug_sectors_per, p + 10);
2175 put_unaligned_be16(sdebug_sector_size, p + 12);
2176 if (sdebug_removable)
2177 p[20] |= 0x20; /* should agree with INQUIRY */
2178 if (1 == pcontrol)
2179 memset(p + 2, 0, sizeof(format_pg) - 2);
2180 return sizeof(format_pg);
2181}
2182
2183static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
2184 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
2185 0, 0, 0, 0};
2186
2187static int resp_caching_pg(unsigned char *p, int pcontrol, int target)
2188{ /* Caching page for mode_sense */
2189 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
2190 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
2191 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
2192 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
2193
2194 if (SDEBUG_OPT_N_WCE & sdebug_opts)
2195 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
2196 memcpy(p, caching_pg, sizeof(caching_pg));
2197 if (1 == pcontrol)
2198 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
2199 else if (2 == pcontrol)
2200 memcpy(p, d_caching_pg, sizeof(d_caching_pg));
2201 return sizeof(caching_pg);
2202}
2203
2204static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
2205 0, 0, 0x2, 0x4b};
2206
2207static int resp_ctrl_m_pg(unsigned char *p, int pcontrol, int target)
2208{ /* Control mode page for mode_sense */
2209 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
2210 0, 0, 0, 0};
2211 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
2212 0, 0, 0x2, 0x4b};
2213
2214 if (sdebug_dsense)
2215 ctrl_m_pg[2] |= 0x4;
2216 else
2217 ctrl_m_pg[2] &= ~0x4;
2218
2219 if (sdebug_ato)
2220 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
2221
2222 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
2223 if (1 == pcontrol)
2224 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
2225 else if (2 == pcontrol)
2226 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
2227 return sizeof(ctrl_m_pg);
2228}
2229
2230
2231static int resp_iec_m_pg(unsigned char *p, int pcontrol, int target)
2232{ /* Informational Exceptions control mode page for mode_sense */
2233 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
2234 0, 0, 0x0, 0x0};
2235 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
2236 0, 0, 0x0, 0x0};
2237
2238 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
2239 if (1 == pcontrol)
2240 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
2241 else if (2 == pcontrol)
2242 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
2243 return sizeof(iec_m_pg);
2244}
2245
2246static int resp_sas_sf_m_pg(unsigned char *p, int pcontrol, int target)
2247{ /* SAS SSP mode page - short format for mode_sense */
2248 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
2249 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
2250
2251 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
2252 if (1 == pcontrol)
2253 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
2254 return sizeof(sas_sf_m_pg);
2255}
2256
2257
2258static int resp_sas_pcd_m_spg(unsigned char *p, int pcontrol, int target,
2259 int target_dev_id)
2260{ /* SAS phy control and discover mode page for mode_sense */
2261 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
2262 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
2263 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2264 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2265 0x2, 0, 0, 0, 0, 0, 0, 0,
2266 0x88, 0x99, 0, 0, 0, 0, 0, 0,
2267 0, 0, 0, 0, 0, 0, 0, 0,
2268 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
2269 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2270 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2271 0x3, 0, 0, 0, 0, 0, 0, 0,
2272 0x88, 0x99, 0, 0, 0, 0, 0, 0,
2273 0, 0, 0, 0, 0, 0, 0, 0,
2274 };
2275 int port_a, port_b;
2276
2277 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 16);
2278 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 24);
2279 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 64);
2280 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 72);
2281 port_a = target_dev_id + 1;
2282 port_b = port_a + 1;
2283 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
2284 put_unaligned_be32(port_a, p + 20);
2285 put_unaligned_be32(port_b, p + 48 + 20);
2286 if (1 == pcontrol)
2287 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
2288 return sizeof(sas_pcd_m_pg);
2289}
2290
2291static int resp_sas_sha_m_spg(unsigned char *p, int pcontrol)
2292{ /* SAS SSP shared protocol specific port mode subpage */
2293 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
2294 0, 0, 0, 0, 0, 0, 0, 0,
2295 };
2296
2297 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
2298 if (1 == pcontrol)
2299 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
2300 return sizeof(sas_sha_m_pg);
2301}
2302
2303#define SDEBUG_MAX_MSENSE_SZ 256
2304
2305static int resp_mode_sense(struct scsi_cmnd *scp,
2306 struct sdebug_dev_info *devip)
2307{
2308 int pcontrol, pcode, subpcode, bd_len;
2309 unsigned char dev_spec;
2310 int alloc_len, offset, len, target_dev_id;
2311 int target = scp->device->id;
2312 unsigned char *ap;
2313 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
2314 unsigned char *cmd = scp->cmnd;
2315 bool dbd, llbaa, msense_6, is_disk, is_zbc, bad_pcode;
2316
2317 dbd = !!(cmd[1] & 0x8); /* disable block descriptors */
2318 pcontrol = (cmd[2] & 0xc0) >> 6;
2319 pcode = cmd[2] & 0x3f;
2320 subpcode = cmd[3];
2321 msense_6 = (MODE_SENSE == cmd[0]);
2322 llbaa = msense_6 ? false : !!(cmd[1] & 0x10);
2323 is_disk = (sdebug_ptype == TYPE_DISK);
2324 is_zbc = (devip->zmodel != BLK_ZONED_NONE);
2325 if ((is_disk || is_zbc) && !dbd)
2326 bd_len = llbaa ? 16 : 8;
2327 else
2328 bd_len = 0;
2329 alloc_len = msense_6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2330 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
2331 if (0x3 == pcontrol) { /* Saving values not supported */
2332 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
2333 return check_condition_result;
2334 }
2335 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
2336 (devip->target * 1000) - 3;
2337 /* for disks+zbc set DPOFUA bit and clear write protect (WP) bit */
2338 if (is_disk || is_zbc) {
2339 dev_spec = 0x10; /* =0x90 if WP=1 implies read-only */
2340 if (sdebug_wp)
2341 dev_spec |= 0x80;
2342 } else
2343 dev_spec = 0x0;
2344 if (msense_6) {
2345 arr[2] = dev_spec;
2346 arr[3] = bd_len;
2347 offset = 4;
2348 } else {
2349 arr[3] = dev_spec;
2350 if (16 == bd_len)
2351 arr[4] = 0x1; /* set LONGLBA bit */
2352 arr[7] = bd_len; /* assume 255 or less */
2353 offset = 8;
2354 }
2355 ap = arr + offset;
2356 if ((bd_len > 0) && (!sdebug_capacity))
2357 sdebug_capacity = get_sdebug_capacity();
2358
2359 if (8 == bd_len) {
2360 if (sdebug_capacity > 0xfffffffe)
2361 put_unaligned_be32(0xffffffff, ap + 0);
2362 else
2363 put_unaligned_be32(sdebug_capacity, ap + 0);
2364 put_unaligned_be16(sdebug_sector_size, ap + 6);
2365 offset += bd_len;
2366 ap = arr + offset;
2367 } else if (16 == bd_len) {
2368 put_unaligned_be64((u64)sdebug_capacity, ap + 0);
2369 put_unaligned_be32(sdebug_sector_size, ap + 12);
2370 offset += bd_len;
2371 ap = arr + offset;
2372 }
2373
2374 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
2375 /* TODO: Control Extension page */
2376 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2377 return check_condition_result;
2378 }
2379 bad_pcode = false;
2380
2381 switch (pcode) {
2382 case 0x1: /* Read-Write error recovery page, direct access */
2383 len = resp_err_recov_pg(ap, pcontrol, target);
2384 offset += len;
2385 break;
2386 case 0x2: /* Disconnect-Reconnect page, all devices */
2387 len = resp_disconnect_pg(ap, pcontrol, target);
2388 offset += len;
2389 break;
2390 case 0x3: /* Format device page, direct access */
2391 if (is_disk) {
2392 len = resp_format_pg(ap, pcontrol, target);
2393 offset += len;
2394 } else
2395 bad_pcode = true;
2396 break;
2397 case 0x8: /* Caching page, direct access */
2398 if (is_disk || is_zbc) {
2399 len = resp_caching_pg(ap, pcontrol, target);
2400 offset += len;
2401 } else
2402 bad_pcode = true;
2403 break;
2404 case 0xa: /* Control Mode page, all devices */
2405 len = resp_ctrl_m_pg(ap, pcontrol, target);
2406 offset += len;
2407 break;
2408 case 0x19: /* if spc==1 then sas phy, control+discover */
2409 if ((subpcode > 0x2) && (subpcode < 0xff)) {
2410 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2411 return check_condition_result;
2412 }
2413 len = 0;
2414 if ((0x0 == subpcode) || (0xff == subpcode))
2415 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2416 if ((0x1 == subpcode) || (0xff == subpcode))
2417 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
2418 target_dev_id);
2419 if ((0x2 == subpcode) || (0xff == subpcode))
2420 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2421 offset += len;
2422 break;
2423 case 0x1c: /* Informational Exceptions Mode page, all devices */
2424 len = resp_iec_m_pg(ap, pcontrol, target);
2425 offset += len;
2426 break;
2427 case 0x3f: /* Read all Mode pages */
2428 if ((0 == subpcode) || (0xff == subpcode)) {
2429 len = resp_err_recov_pg(ap, pcontrol, target);
2430 len += resp_disconnect_pg(ap + len, pcontrol, target);
2431 if (is_disk) {
2432 len += resp_format_pg(ap + len, pcontrol,
2433 target);
2434 len += resp_caching_pg(ap + len, pcontrol,
2435 target);
2436 } else if (is_zbc) {
2437 len += resp_caching_pg(ap + len, pcontrol,
2438 target);
2439 }
2440 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
2441 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2442 if (0xff == subpcode) {
2443 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
2444 target, target_dev_id);
2445 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2446 }
2447 len += resp_iec_m_pg(ap + len, pcontrol, target);
2448 offset += len;
2449 } else {
2450 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2451 return check_condition_result;
2452 }
2453 break;
2454 default:
2455 bad_pcode = true;
2456 break;
2457 }
2458 if (bad_pcode) {
2459 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2460 return check_condition_result;
2461 }
2462 if (msense_6)
2463 arr[0] = offset - 1;
2464 else
2465 put_unaligned_be16((offset - 2), arr + 0);
2466 return fill_from_dev_buffer(scp, arr, min_t(int, alloc_len, offset));
2467}
2468
2469#define SDEBUG_MAX_MSELECT_SZ 512
2470
2471static int resp_mode_select(struct scsi_cmnd *scp,
2472 struct sdebug_dev_info *devip)
2473{
2474 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
2475 int param_len, res, mpage;
2476 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
2477 unsigned char *cmd = scp->cmnd;
2478 int mselect6 = (MODE_SELECT == cmd[0]);
2479
2480 memset(arr, 0, sizeof(arr));
2481 pf = cmd[1] & 0x10;
2482 sp = cmd[1] & 0x1;
2483 param_len = mselect6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2484 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
2485 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1);
2486 return check_condition_result;
2487 }
2488 res = fetch_to_dev_buffer(scp, arr, param_len);
2489 if (-1 == res)
2490 return DID_ERROR << 16;
2491 else if (sdebug_verbose && (res < param_len))
2492 sdev_printk(KERN_INFO, scp->device,
2493 "%s: cdb indicated=%d, IO sent=%d bytes\n",
2494 __func__, param_len, res);
2495 md_len = mselect6 ? (arr[0] + 1) : (get_unaligned_be16(arr + 0) + 2);
2496 bd_len = mselect6 ? arr[3] : get_unaligned_be16(arr + 6);
2497 if (md_len > 2) {
2498 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1);
2499 return check_condition_result;
2500 }
2501 off = bd_len + (mselect6 ? 4 : 8);
2502 mpage = arr[off] & 0x3f;
2503 ps = !!(arr[off] & 0x80);
2504 if (ps) {
2505 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7);
2506 return check_condition_result;
2507 }
2508 spf = !!(arr[off] & 0x40);
2509 pg_len = spf ? (get_unaligned_be16(arr + off + 2) + 4) :
2510 (arr[off + 1] + 2);
2511 if ((pg_len + off) > param_len) {
2512 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2513 PARAMETER_LIST_LENGTH_ERR, 0);
2514 return check_condition_result;
2515 }
2516 switch (mpage) {
2517 case 0x8: /* Caching Mode page */
2518 if (caching_pg[1] == arr[off + 1]) {
2519 memcpy(caching_pg + 2, arr + off + 2,
2520 sizeof(caching_pg) - 2);
2521 goto set_mode_changed_ua;
2522 }
2523 break;
2524 case 0xa: /* Control Mode page */
2525 if (ctrl_m_pg[1] == arr[off + 1]) {
2526 memcpy(ctrl_m_pg + 2, arr + off + 2,
2527 sizeof(ctrl_m_pg) - 2);
2528 if (ctrl_m_pg[4] & 0x8)
2529 sdebug_wp = true;
2530 else
2531 sdebug_wp = false;
2532 sdebug_dsense = !!(ctrl_m_pg[2] & 0x4);
2533 goto set_mode_changed_ua;
2534 }
2535 break;
2536 case 0x1c: /* Informational Exceptions Mode page */
2537 if (iec_m_pg[1] == arr[off + 1]) {
2538 memcpy(iec_m_pg + 2, arr + off + 2,
2539 sizeof(iec_m_pg) - 2);
2540 goto set_mode_changed_ua;
2541 }
2542 break;
2543 default:
2544 break;
2545 }
2546 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5);
2547 return check_condition_result;
2548set_mode_changed_ua:
2549 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
2550 return 0;
2551}
2552
2553static int resp_temp_l_pg(unsigned char *arr)
2554{
2555 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
2556 0x0, 0x1, 0x3, 0x2, 0x0, 65,
2557 };
2558
2559 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
2560 return sizeof(temp_l_pg);
2561}
2562
2563static int resp_ie_l_pg(unsigned char *arr)
2564{
2565 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
2566 };
2567
2568 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
2569 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
2570 arr[4] = THRESHOLD_EXCEEDED;
2571 arr[5] = 0xff;
2572 }
2573 return sizeof(ie_l_pg);
2574}
2575
2576#define SDEBUG_MAX_LSENSE_SZ 512
2577
2578static int resp_log_sense(struct scsi_cmnd *scp,
2579 struct sdebug_dev_info *devip)
2580{
2581 int ppc, sp, pcode, subpcode, alloc_len, len, n;
2582 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
2583 unsigned char *cmd = scp->cmnd;
2584
2585 memset(arr, 0, sizeof(arr));
2586 ppc = cmd[1] & 0x2;
2587 sp = cmd[1] & 0x1;
2588 if (ppc || sp) {
2589 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0);
2590 return check_condition_result;
2591 }
2592 pcode = cmd[2] & 0x3f;
2593 subpcode = cmd[3] & 0xff;
2594 alloc_len = get_unaligned_be16(cmd + 7);
2595 arr[0] = pcode;
2596 if (0 == subpcode) {
2597 switch (pcode) {
2598 case 0x0: /* Supported log pages log page */
2599 n = 4;
2600 arr[n++] = 0x0; /* this page */
2601 arr[n++] = 0xd; /* Temperature */
2602 arr[n++] = 0x2f; /* Informational exceptions */
2603 arr[3] = n - 4;
2604 break;
2605 case 0xd: /* Temperature log page */
2606 arr[3] = resp_temp_l_pg(arr + 4);
2607 break;
2608 case 0x2f: /* Informational exceptions log page */
2609 arr[3] = resp_ie_l_pg(arr + 4);
2610 break;
2611 default:
2612 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2613 return check_condition_result;
2614 }
2615 } else if (0xff == subpcode) {
2616 arr[0] |= 0x40;
2617 arr[1] = subpcode;
2618 switch (pcode) {
2619 case 0x0: /* Supported log pages and subpages log page */
2620 n = 4;
2621 arr[n++] = 0x0;
2622 arr[n++] = 0x0; /* 0,0 page */
2623 arr[n++] = 0x0;
2624 arr[n++] = 0xff; /* this page */
2625 arr[n++] = 0xd;
2626 arr[n++] = 0x0; /* Temperature */
2627 arr[n++] = 0x2f;
2628 arr[n++] = 0x0; /* Informational exceptions */
2629 arr[3] = n - 4;
2630 break;
2631 case 0xd: /* Temperature subpages */
2632 n = 4;
2633 arr[n++] = 0xd;
2634 arr[n++] = 0x0; /* Temperature */
2635 arr[3] = n - 4;
2636 break;
2637 case 0x2f: /* Informational exceptions subpages */
2638 n = 4;
2639 arr[n++] = 0x2f;
2640 arr[n++] = 0x0; /* Informational exceptions */
2641 arr[3] = n - 4;
2642 break;
2643 default:
2644 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2645 return check_condition_result;
2646 }
2647 } else {
2648 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2649 return check_condition_result;
2650 }
2651 len = min_t(int, get_unaligned_be16(arr + 2) + 4, alloc_len);
2652 return fill_from_dev_buffer(scp, arr,
2653 min_t(int, len, SDEBUG_MAX_INQ_ARR_SZ));
2654}
2655
2656static inline bool sdebug_dev_is_zoned(struct sdebug_dev_info *devip)
2657{
2658 return devip->nr_zones != 0;
2659}
2660
2661static struct sdeb_zone_state *zbc_zone(struct sdebug_dev_info *devip,
2662 unsigned long long lba)
2663{
2664 return &devip->zstate[lba >> devip->zsize_shift];
2665}
2666
2667static inline bool zbc_zone_is_conv(struct sdeb_zone_state *zsp)
2668{
2669 return zsp->z_type == ZBC_ZONE_TYPE_CNV;
2670}
2671
2672static void zbc_close_zone(struct sdebug_dev_info *devip,
2673 struct sdeb_zone_state *zsp)
2674{
2675 enum sdebug_z_cond zc;
2676
2677 if (zbc_zone_is_conv(zsp))
2678 return;
2679
2680 zc = zsp->z_cond;
2681 if (!(zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN))
2682 return;
2683
2684 if (zc == ZC2_IMPLICIT_OPEN)
2685 devip->nr_imp_open--;
2686 else
2687 devip->nr_exp_open--;
2688
2689 if (zsp->z_wp == zsp->z_start) {
2690 zsp->z_cond = ZC1_EMPTY;
2691 } else {
2692 zsp->z_cond = ZC4_CLOSED;
2693 devip->nr_closed++;
2694 }
2695}
2696
2697static void zbc_close_imp_open_zone(struct sdebug_dev_info *devip)
2698{
2699 struct sdeb_zone_state *zsp = &devip->zstate[0];
2700 unsigned int i;
2701
2702 for (i = 0; i < devip->nr_zones; i++, zsp++) {
2703 if (zsp->z_cond == ZC2_IMPLICIT_OPEN) {
2704 zbc_close_zone(devip, zsp);
2705 return;
2706 }
2707 }
2708}
2709
2710static void zbc_open_zone(struct sdebug_dev_info *devip,
2711 struct sdeb_zone_state *zsp, bool explicit)
2712{
2713 enum sdebug_z_cond zc;
2714
2715 if (zbc_zone_is_conv(zsp))
2716 return;
2717
2718 zc = zsp->z_cond;
2719 if ((explicit && zc == ZC3_EXPLICIT_OPEN) ||
2720 (!explicit && zc == ZC2_IMPLICIT_OPEN))
2721 return;
2722
2723 /* Close an implicit open zone if necessary */
2724 if (explicit && zsp->z_cond == ZC2_IMPLICIT_OPEN)
2725 zbc_close_zone(devip, zsp);
2726 else if (devip->max_open &&
2727 devip->nr_imp_open + devip->nr_exp_open >= devip->max_open)
2728 zbc_close_imp_open_zone(devip);
2729
2730 if (zsp->z_cond == ZC4_CLOSED)
2731 devip->nr_closed--;
2732 if (explicit) {
2733 zsp->z_cond = ZC3_EXPLICIT_OPEN;
2734 devip->nr_exp_open++;
2735 } else {
2736 zsp->z_cond = ZC2_IMPLICIT_OPEN;
2737 devip->nr_imp_open++;
2738 }
2739}
2740
2741static void zbc_inc_wp(struct sdebug_dev_info *devip,
2742 unsigned long long lba, unsigned int num)
2743{
2744 struct sdeb_zone_state *zsp = zbc_zone(devip, lba);
2745 unsigned long long n, end, zend = zsp->z_start + zsp->z_size;
2746
2747 if (zbc_zone_is_conv(zsp))
2748 return;
2749
2750 if (zsp->z_type == ZBC_ZONE_TYPE_SWR) {
2751 zsp->z_wp += num;
2752 if (zsp->z_wp >= zend)
2753 zsp->z_cond = ZC5_FULL;
2754 return;
2755 }
2756
2757 while (num) {
2758 if (lba != zsp->z_wp)
2759 zsp->z_non_seq_resource = true;
2760
2761 end = lba + num;
2762 if (end >= zend) {
2763 n = zend - lba;
2764 zsp->z_wp = zend;
2765 } else if (end > zsp->z_wp) {
2766 n = num;
2767 zsp->z_wp = end;
2768 } else {
2769 n = num;
2770 }
2771 if (zsp->z_wp >= zend)
2772 zsp->z_cond = ZC5_FULL;
2773
2774 num -= n;
2775 lba += n;
2776 if (num) {
2777 zsp++;
2778 zend = zsp->z_start + zsp->z_size;
2779 }
2780 }
2781}
2782
2783static int check_zbc_access_params(struct scsi_cmnd *scp,
2784 unsigned long long lba, unsigned int num, bool write)
2785{
2786 struct scsi_device *sdp = scp->device;
2787 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
2788 struct sdeb_zone_state *zsp = zbc_zone(devip, lba);
2789 struct sdeb_zone_state *zsp_end = zbc_zone(devip, lba + num - 1);
2790
2791 if (!write) {
2792 if (devip->zmodel == BLK_ZONED_HA)
2793 return 0;
2794 /* For host-managed, reads cannot cross zone types boundaries */
2795 if (zsp_end != zsp &&
2796 zbc_zone_is_conv(zsp) &&
2797 !zbc_zone_is_conv(zsp_end)) {
2798 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2799 LBA_OUT_OF_RANGE,
2800 READ_INVDATA_ASCQ);
2801 return check_condition_result;
2802 }
2803 return 0;
2804 }
2805
2806 /* No restrictions for writes within conventional zones */
2807 if (zbc_zone_is_conv(zsp)) {
2808 if (!zbc_zone_is_conv(zsp_end)) {
2809 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2810 LBA_OUT_OF_RANGE,
2811 WRITE_BOUNDARY_ASCQ);
2812 return check_condition_result;
2813 }
2814 return 0;
2815 }
2816
2817 if (zsp->z_type == ZBC_ZONE_TYPE_SWR) {
2818 /* Writes cannot cross sequential zone boundaries */
2819 if (zsp_end != zsp) {
2820 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2821 LBA_OUT_OF_RANGE,
2822 WRITE_BOUNDARY_ASCQ);
2823 return check_condition_result;
2824 }
2825 /* Cannot write full zones */
2826 if (zsp->z_cond == ZC5_FULL) {
2827 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2828 INVALID_FIELD_IN_CDB, 0);
2829 return check_condition_result;
2830 }
2831 /* Writes must be aligned to the zone WP */
2832 if (lba != zsp->z_wp) {
2833 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2834 LBA_OUT_OF_RANGE,
2835 UNALIGNED_WRITE_ASCQ);
2836 return check_condition_result;
2837 }
2838 }
2839
2840 /* Handle implicit open of closed and empty zones */
2841 if (zsp->z_cond == ZC1_EMPTY || zsp->z_cond == ZC4_CLOSED) {
2842 if (devip->max_open &&
2843 devip->nr_exp_open >= devip->max_open) {
2844 mk_sense_buffer(scp, DATA_PROTECT,
2845 INSUFF_RES_ASC,
2846 INSUFF_ZONE_ASCQ);
2847 return check_condition_result;
2848 }
2849 zbc_open_zone(devip, zsp, false);
2850 }
2851
2852 return 0;
2853}
2854
2855static inline int check_device_access_params
2856 (struct scsi_cmnd *scp, unsigned long long lba,
2857 unsigned int num, bool write)
2858{
2859 struct scsi_device *sdp = scp->device;
2860 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
2861
2862 if (lba + num > sdebug_capacity) {
2863 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2864 return check_condition_result;
2865 }
2866 /* transfer length excessive (tie in to block limits VPD page) */
2867 if (num > sdebug_store_sectors) {
2868 /* needs work to find which cdb byte 'num' comes from */
2869 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2870 return check_condition_result;
2871 }
2872 if (write && unlikely(sdebug_wp)) {
2873 mk_sense_buffer(scp, DATA_PROTECT, WRITE_PROTECTED, 0x2);
2874 return check_condition_result;
2875 }
2876 if (sdebug_dev_is_zoned(devip))
2877 return check_zbc_access_params(scp, lba, num, write);
2878
2879 return 0;
2880}
2881
2882/*
2883 * Note: if BUG_ON() fires it usually indicates a problem with the parser
2884 * tables. Perhaps a missing F_FAKE_RW or FF_MEDIA_IO flag. Response functions
2885 * that access any of the "stores" in struct sdeb_store_info should call this
2886 * function with bug_if_fake_rw set to true.
2887 */
2888static inline struct sdeb_store_info *devip2sip(struct sdebug_dev_info *devip,
2889 bool bug_if_fake_rw)
2890{
2891 if (sdebug_fake_rw) {
2892 BUG_ON(bug_if_fake_rw); /* See note above */
2893 return NULL;
2894 }
2895 return xa_load(per_store_ap, devip->sdbg_host->si_idx);
2896}
2897
2898/* Returns number of bytes copied or -1 if error. */
2899static int do_device_access(struct sdeb_store_info *sip, struct scsi_cmnd *scp,
2900 u32 sg_skip, u64 lba, u32 num, bool do_write)
2901{
2902 int ret;
2903 u64 block, rest = 0;
2904 enum dma_data_direction dir;
2905 struct scsi_data_buffer *sdb = &scp->sdb;
2906 u8 *fsp;
2907
2908 if (do_write) {
2909 dir = DMA_TO_DEVICE;
2910 write_since_sync = true;
2911 } else {
2912 dir = DMA_FROM_DEVICE;
2913 }
2914
2915 if (!sdb->length || !sip)
2916 return 0;
2917 if (scp->sc_data_direction != dir)
2918 return -1;
2919 fsp = sip->storep;
2920
2921 block = do_div(lba, sdebug_store_sectors);
2922 if (block + num > sdebug_store_sectors)
2923 rest = block + num - sdebug_store_sectors;
2924
2925 ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
2926 fsp + (block * sdebug_sector_size),
2927 (num - rest) * sdebug_sector_size, sg_skip, do_write);
2928 if (ret != (num - rest) * sdebug_sector_size)
2929 return ret;
2930
2931 if (rest) {
2932 ret += sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
2933 fsp, rest * sdebug_sector_size,
2934 sg_skip + ((num - rest) * sdebug_sector_size),
2935 do_write);
2936 }
2937
2938 return ret;
2939}
2940
2941/* Returns number of bytes copied or -1 if error. */
2942static int do_dout_fetch(struct scsi_cmnd *scp, u32 num, u8 *doutp)
2943{
2944 struct scsi_data_buffer *sdb = &scp->sdb;
2945
2946 if (!sdb->length)
2947 return 0;
2948 if (scp->sc_data_direction != DMA_TO_DEVICE)
2949 return -1;
2950 return sg_copy_buffer(sdb->table.sgl, sdb->table.nents, doutp,
2951 num * sdebug_sector_size, 0, true);
2952}
2953
2954/* If sip->storep+lba compares equal to arr(num), then copy top half of
2955 * arr into sip->storep+lba and return true. If comparison fails then
2956 * return false. */
2957static bool comp_write_worker(struct sdeb_store_info *sip, u64 lba, u32 num,
2958 const u8 *arr, bool compare_only)
2959{
2960 bool res;
2961 u64 block, rest = 0;
2962 u32 store_blks = sdebug_store_sectors;
2963 u32 lb_size = sdebug_sector_size;
2964 u8 *fsp = sip->storep;
2965
2966 block = do_div(lba, store_blks);
2967 if (block + num > store_blks)
2968 rest = block + num - store_blks;
2969
2970 res = !memcmp(fsp + (block * lb_size), arr, (num - rest) * lb_size);
2971 if (!res)
2972 return res;
2973 if (rest)
2974 res = memcmp(fsp, arr + ((num - rest) * lb_size),
2975 rest * lb_size);
2976 if (!res)
2977 return res;
2978 if (compare_only)
2979 return true;
2980 arr += num * lb_size;
2981 memcpy(fsp + (block * lb_size), arr, (num - rest) * lb_size);
2982 if (rest)
2983 memcpy(fsp, arr + ((num - rest) * lb_size), rest * lb_size);
2984 return res;
2985}
2986
2987static __be16 dif_compute_csum(const void *buf, int len)
2988{
2989 __be16 csum;
2990
2991 if (sdebug_guard)
2992 csum = (__force __be16)ip_compute_csum(buf, len);
2993 else
2994 csum = cpu_to_be16(crc_t10dif(buf, len));
2995
2996 return csum;
2997}
2998
2999static int dif_verify(struct t10_pi_tuple *sdt, const void *data,
3000 sector_t sector, u32 ei_lba)
3001{
3002 __be16 csum = dif_compute_csum(data, sdebug_sector_size);
3003
3004 if (sdt->guard_tag != csum) {
3005 pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
3006 (unsigned long)sector,
3007 be16_to_cpu(sdt->guard_tag),
3008 be16_to_cpu(csum));
3009 return 0x01;
3010 }
3011 if (sdebug_dif == T10_PI_TYPE1_PROTECTION &&
3012 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
3013 pr_err("REF check failed on sector %lu\n",
3014 (unsigned long)sector);
3015 return 0x03;
3016 }
3017 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3018 be32_to_cpu(sdt->ref_tag) != ei_lba) {
3019 pr_err("REF check failed on sector %lu\n",
3020 (unsigned long)sector);
3021 return 0x03;
3022 }
3023 return 0;
3024}
3025
3026static void dif_copy_prot(struct scsi_cmnd *scp, sector_t sector,
3027 unsigned int sectors, bool read)
3028{
3029 size_t resid;
3030 void *paddr;
3031 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
3032 scp->device->hostdata, true);
3033 struct t10_pi_tuple *dif_storep = sip->dif_storep;
3034 const void *dif_store_end = dif_storep + sdebug_store_sectors;
3035 struct sg_mapping_iter miter;
3036
3037 /* Bytes of protection data to copy into sgl */
3038 resid = sectors * sizeof(*dif_storep);
3039
3040 sg_miter_start(&miter, scsi_prot_sglist(scp),
3041 scsi_prot_sg_count(scp), SG_MITER_ATOMIC |
3042 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
3043
3044 while (sg_miter_next(&miter) && resid > 0) {
3045 size_t len = min_t(size_t, miter.length, resid);
3046 void *start = dif_store(sip, sector);
3047 size_t rest = 0;
3048
3049 if (dif_store_end < start + len)
3050 rest = start + len - dif_store_end;
3051
3052 paddr = miter.addr;
3053
3054 if (read)
3055 memcpy(paddr, start, len - rest);
3056 else
3057 memcpy(start, paddr, len - rest);
3058
3059 if (rest) {
3060 if (read)
3061 memcpy(paddr + len - rest, dif_storep, rest);
3062 else
3063 memcpy(dif_storep, paddr + len - rest, rest);
3064 }
3065
3066 sector += len / sizeof(*dif_storep);
3067 resid -= len;
3068 }
3069 sg_miter_stop(&miter);
3070}
3071
3072static int prot_verify_read(struct scsi_cmnd *scp, sector_t start_sec,
3073 unsigned int sectors, u32 ei_lba)
3074{
3075 unsigned int i;
3076 sector_t sector;
3077 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
3078 scp->device->hostdata, true);
3079 struct t10_pi_tuple *sdt;
3080
3081 for (i = 0; i < sectors; i++, ei_lba++) {
3082 int ret;
3083
3084 sector = start_sec + i;
3085 sdt = dif_store(sip, sector);
3086
3087 if (sdt->app_tag == cpu_to_be16(0xffff))
3088 continue;
3089
3090 ret = dif_verify(sdt, lba2fake_store(sip, sector), sector,
3091 ei_lba);
3092 if (ret) {
3093 dif_errors++;
3094 return ret;
3095 }
3096 }
3097
3098 dif_copy_prot(scp, start_sec, sectors, true);
3099 dix_reads++;
3100
3101 return 0;
3102}
3103
3104static int resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3105{
3106 bool check_prot;
3107 u32 num;
3108 u32 ei_lba;
3109 int ret;
3110 u64 lba;
3111 struct sdeb_store_info *sip = devip2sip(devip, true);
3112 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
3113 u8 *cmd = scp->cmnd;
3114
3115 switch (cmd[0]) {
3116 case READ_16:
3117 ei_lba = 0;
3118 lba = get_unaligned_be64(cmd + 2);
3119 num = get_unaligned_be32(cmd + 10);
3120 check_prot = true;
3121 break;
3122 case READ_10:
3123 ei_lba = 0;
3124 lba = get_unaligned_be32(cmd + 2);
3125 num = get_unaligned_be16(cmd + 7);
3126 check_prot = true;
3127 break;
3128 case READ_6:
3129 ei_lba = 0;
3130 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
3131 (u32)(cmd[1] & 0x1f) << 16;
3132 num = (0 == cmd[4]) ? 256 : cmd[4];
3133 check_prot = true;
3134 break;
3135 case READ_12:
3136 ei_lba = 0;
3137 lba = get_unaligned_be32(cmd + 2);
3138 num = get_unaligned_be32(cmd + 6);
3139 check_prot = true;
3140 break;
3141 case XDWRITEREAD_10:
3142 ei_lba = 0;
3143 lba = get_unaligned_be32(cmd + 2);
3144 num = get_unaligned_be16(cmd + 7);
3145 check_prot = false;
3146 break;
3147 default: /* assume READ(32) */
3148 lba = get_unaligned_be64(cmd + 12);
3149 ei_lba = get_unaligned_be32(cmd + 20);
3150 num = get_unaligned_be32(cmd + 28);
3151 check_prot = false;
3152 break;
3153 }
3154 if (unlikely(have_dif_prot && check_prot)) {
3155 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3156 (cmd[1] & 0xe0)) {
3157 mk_sense_invalid_opcode(scp);
3158 return check_condition_result;
3159 }
3160 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3161 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3162 (cmd[1] & 0xe0) == 0)
3163 sdev_printk(KERN_ERR, scp->device, "Unprotected RD "
3164 "to DIF device\n");
3165 }
3166 if (unlikely((sdebug_opts & SDEBUG_OPT_SHORT_TRANSFER) &&
3167 atomic_read(&sdeb_inject_pending))) {
3168 num /= 2;
3169 atomic_set(&sdeb_inject_pending, 0);
3170 }
3171
3172 ret = check_device_access_params(scp, lba, num, false);
3173 if (ret)
3174 return ret;
3175 if (unlikely((SDEBUG_OPT_MEDIUM_ERR & sdebug_opts) &&
3176 (lba <= (sdebug_medium_error_start + sdebug_medium_error_count - 1)) &&
3177 ((lba + num) > sdebug_medium_error_start))) {
3178 /* claim unrecoverable read error */
3179 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
3180 /* set info field and valid bit for fixed descriptor */
3181 if (0x70 == (scp->sense_buffer[0] & 0x7f)) {
3182 scp->sense_buffer[0] |= 0x80; /* Valid bit */
3183 ret = (lba < OPT_MEDIUM_ERR_ADDR)
3184 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
3185 put_unaligned_be32(ret, scp->sense_buffer + 3);
3186 }
3187 scsi_set_resid(scp, scsi_bufflen(scp));
3188 return check_condition_result;
3189 }
3190
3191 read_lock(macc_lckp);
3192
3193 /* DIX + T10 DIF */
3194 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3195 int prot_ret = prot_verify_read(scp, lba, num, ei_lba);
3196
3197 if (prot_ret) {
3198 read_unlock(macc_lckp);
3199 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, prot_ret);
3200 return illegal_condition_result;
3201 }
3202 }
3203
3204 ret = do_device_access(sip, scp, 0, lba, num, false);
3205 read_unlock(macc_lckp);
3206 if (unlikely(ret == -1))
3207 return DID_ERROR << 16;
3208
3209 scsi_set_resid(scp, scsi_bufflen(scp) - ret);
3210
3211 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
3212 atomic_read(&sdeb_inject_pending))) {
3213 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
3214 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
3215 atomic_set(&sdeb_inject_pending, 0);
3216 return check_condition_result;
3217 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
3218 /* Logical block guard check failed */
3219 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3220 atomic_set(&sdeb_inject_pending, 0);
3221 return illegal_condition_result;
3222 } else if (SDEBUG_OPT_DIX_ERR & sdebug_opts) {
3223 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3224 atomic_set(&sdeb_inject_pending, 0);
3225 return illegal_condition_result;
3226 }
3227 }
3228 return 0;
3229}
3230
3231static void dump_sector(unsigned char *buf, int len)
3232{
3233 int i, j, n;
3234
3235 pr_err(">>> Sector Dump <<<\n");
3236 for (i = 0 ; i < len ; i += 16) {
3237 char b[128];
3238
3239 for (j = 0, n = 0; j < 16; j++) {
3240 unsigned char c = buf[i+j];
3241
3242 if (c >= 0x20 && c < 0x7e)
3243 n += scnprintf(b + n, sizeof(b) - n,
3244 " %c ", buf[i+j]);
3245 else
3246 n += scnprintf(b + n, sizeof(b) - n,
3247 "%02x ", buf[i+j]);
3248 }
3249 pr_err("%04d: %s\n", i, b);
3250 }
3251}
3252
3253static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
3254 unsigned int sectors, u32 ei_lba)
3255{
3256 int ret;
3257 struct t10_pi_tuple *sdt;
3258 void *daddr;
3259 sector_t sector = start_sec;
3260 int ppage_offset;
3261 int dpage_offset;
3262 struct sg_mapping_iter diter;
3263 struct sg_mapping_iter piter;
3264
3265 BUG_ON(scsi_sg_count(SCpnt) == 0);
3266 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
3267
3268 sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
3269 scsi_prot_sg_count(SCpnt),
3270 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
3271 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
3272 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
3273
3274 /* For each protection page */
3275 while (sg_miter_next(&piter)) {
3276 dpage_offset = 0;
3277 if (WARN_ON(!sg_miter_next(&diter))) {
3278 ret = 0x01;
3279 goto out;
3280 }
3281
3282 for (ppage_offset = 0; ppage_offset < piter.length;
3283 ppage_offset += sizeof(struct t10_pi_tuple)) {
3284 /* If we're at the end of the current
3285 * data page advance to the next one
3286 */
3287 if (dpage_offset >= diter.length) {
3288 if (WARN_ON(!sg_miter_next(&diter))) {
3289 ret = 0x01;
3290 goto out;
3291 }
3292 dpage_offset = 0;
3293 }
3294
3295 sdt = piter.addr + ppage_offset;
3296 daddr = diter.addr + dpage_offset;
3297
3298 ret = dif_verify(sdt, daddr, sector, ei_lba);
3299 if (ret) {
3300 dump_sector(daddr, sdebug_sector_size);
3301 goto out;
3302 }
3303
3304 sector++;
3305 ei_lba++;
3306 dpage_offset += sdebug_sector_size;
3307 }
3308 diter.consumed = dpage_offset;
3309 sg_miter_stop(&diter);
3310 }
3311 sg_miter_stop(&piter);
3312
3313 dif_copy_prot(SCpnt, start_sec, sectors, false);
3314 dix_writes++;
3315
3316 return 0;
3317
3318out:
3319 dif_errors++;
3320 sg_miter_stop(&diter);
3321 sg_miter_stop(&piter);
3322 return ret;
3323}
3324
3325static unsigned long lba_to_map_index(sector_t lba)
3326{
3327 if (sdebug_unmap_alignment)
3328 lba += sdebug_unmap_granularity - sdebug_unmap_alignment;
3329 sector_div(lba, sdebug_unmap_granularity);
3330 return lba;
3331}
3332
3333static sector_t map_index_to_lba(unsigned long index)
3334{
3335 sector_t lba = index * sdebug_unmap_granularity;
3336
3337 if (sdebug_unmap_alignment)
3338 lba -= sdebug_unmap_granularity - sdebug_unmap_alignment;
3339 return lba;
3340}
3341
3342static unsigned int map_state(struct sdeb_store_info *sip, sector_t lba,
3343 unsigned int *num)
3344{
3345 sector_t end;
3346 unsigned int mapped;
3347 unsigned long index;
3348 unsigned long next;
3349
3350 index = lba_to_map_index(lba);
3351 mapped = test_bit(index, sip->map_storep);
3352
3353 if (mapped)
3354 next = find_next_zero_bit(sip->map_storep, map_size, index);
3355 else
3356 next = find_next_bit(sip->map_storep, map_size, index);
3357
3358 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
3359 *num = end - lba;
3360 return mapped;
3361}
3362
3363static void map_region(struct sdeb_store_info *sip, sector_t lba,
3364 unsigned int len)
3365{
3366 sector_t end = lba + len;
3367
3368 while (lba < end) {
3369 unsigned long index = lba_to_map_index(lba);
3370
3371 if (index < map_size)
3372 set_bit(index, sip->map_storep);
3373
3374 lba = map_index_to_lba(index + 1);
3375 }
3376}
3377
3378static void unmap_region(struct sdeb_store_info *sip, sector_t lba,
3379 unsigned int len)
3380{
3381 sector_t end = lba + len;
3382 u8 *fsp = sip->storep;
3383
3384 while (lba < end) {
3385 unsigned long index = lba_to_map_index(lba);
3386
3387 if (lba == map_index_to_lba(index) &&
3388 lba + sdebug_unmap_granularity <= end &&
3389 index < map_size) {
3390 clear_bit(index, sip->map_storep);
3391 if (sdebug_lbprz) { /* for LBPRZ=2 return 0xff_s */
3392 memset(fsp + lba * sdebug_sector_size,
3393 (sdebug_lbprz & 1) ? 0 : 0xff,
3394 sdebug_sector_size *
3395 sdebug_unmap_granularity);
3396 }
3397 if (sip->dif_storep) {
3398 memset(sip->dif_storep + lba, 0xff,
3399 sizeof(*sip->dif_storep) *
3400 sdebug_unmap_granularity);
3401 }
3402 }
3403 lba = map_index_to_lba(index + 1);
3404 }
3405}
3406
3407static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3408{
3409 bool check_prot;
3410 u32 num;
3411 u32 ei_lba;
3412 int ret;
3413 u64 lba;
3414 struct sdeb_store_info *sip = devip2sip(devip, true);
3415 rwlock_t *macc_lckp = &sip->macc_lck;
3416 u8 *cmd = scp->cmnd;
3417
3418 switch (cmd[0]) {
3419 case WRITE_16:
3420 ei_lba = 0;
3421 lba = get_unaligned_be64(cmd + 2);
3422 num = get_unaligned_be32(cmd + 10);
3423 check_prot = true;
3424 break;
3425 case WRITE_10:
3426 ei_lba = 0;
3427 lba = get_unaligned_be32(cmd + 2);
3428 num = get_unaligned_be16(cmd + 7);
3429 check_prot = true;
3430 break;
3431 case WRITE_6:
3432 ei_lba = 0;
3433 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
3434 (u32)(cmd[1] & 0x1f) << 16;
3435 num = (0 == cmd[4]) ? 256 : cmd[4];
3436 check_prot = true;
3437 break;
3438 case WRITE_12:
3439 ei_lba = 0;
3440 lba = get_unaligned_be32(cmd + 2);
3441 num = get_unaligned_be32(cmd + 6);
3442 check_prot = true;
3443 break;
3444 case 0x53: /* XDWRITEREAD(10) */
3445 ei_lba = 0;
3446 lba = get_unaligned_be32(cmd + 2);
3447 num = get_unaligned_be16(cmd + 7);
3448 check_prot = false;
3449 break;
3450 default: /* assume WRITE(32) */
3451 lba = get_unaligned_be64(cmd + 12);
3452 ei_lba = get_unaligned_be32(cmd + 20);
3453 num = get_unaligned_be32(cmd + 28);
3454 check_prot = false;
3455 break;
3456 }
3457 if (unlikely(have_dif_prot && check_prot)) {
3458 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3459 (cmd[1] & 0xe0)) {
3460 mk_sense_invalid_opcode(scp);
3461 return check_condition_result;
3462 }
3463 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3464 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3465 (cmd[1] & 0xe0) == 0)
3466 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3467 "to DIF device\n");
3468 }
3469
3470 write_lock(macc_lckp);
3471 ret = check_device_access_params(scp, lba, num, true);
3472 if (ret) {
3473 write_unlock(macc_lckp);
3474 return ret;
3475 }
3476
3477 /* DIX + T10 DIF */
3478 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3479 int prot_ret = prot_verify_write(scp, lba, num, ei_lba);
3480
3481 if (prot_ret) {
3482 write_unlock(macc_lckp);
3483 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, prot_ret);
3484 return illegal_condition_result;
3485 }
3486 }
3487
3488 ret = do_device_access(sip, scp, 0, lba, num, true);
3489 if (unlikely(scsi_debug_lbp()))
3490 map_region(sip, lba, num);
3491 /* If ZBC zone then bump its write pointer */
3492 if (sdebug_dev_is_zoned(devip))
3493 zbc_inc_wp(devip, lba, num);
3494 write_unlock(macc_lckp);
3495 if (unlikely(-1 == ret))
3496 return DID_ERROR << 16;
3497 else if (unlikely(sdebug_verbose &&
3498 (ret < (num * sdebug_sector_size))))
3499 sdev_printk(KERN_INFO, scp->device,
3500 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
3501 my_name, num * sdebug_sector_size, ret);
3502
3503 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
3504 atomic_read(&sdeb_inject_pending))) {
3505 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
3506 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
3507 atomic_set(&sdeb_inject_pending, 0);
3508 return check_condition_result;
3509 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
3510 /* Logical block guard check failed */
3511 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3512 atomic_set(&sdeb_inject_pending, 0);
3513 return illegal_condition_result;
3514 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) {
3515 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3516 atomic_set(&sdeb_inject_pending, 0);
3517 return illegal_condition_result;
3518 }
3519 }
3520 return 0;
3521}
3522
3523/*
3524 * T10 has only specified WRITE SCATTERED(16) and WRITE SCATTERED(32).
3525 * No READ GATHERED yet (requires bidi or long cdb holding gather list).
3526 */
3527static int resp_write_scat(struct scsi_cmnd *scp,
3528 struct sdebug_dev_info *devip)
3529{
3530 u8 *cmd = scp->cmnd;
3531 u8 *lrdp = NULL;
3532 u8 *up;
3533 struct sdeb_store_info *sip = devip2sip(devip, true);
3534 rwlock_t *macc_lckp = &sip->macc_lck;
3535 u8 wrprotect;
3536 u16 lbdof, num_lrd, k;
3537 u32 num, num_by, bt_len, lbdof_blen, sg_off, cum_lb;
3538 u32 lb_size = sdebug_sector_size;
3539 u32 ei_lba;
3540 u64 lba;
3541 int ret, res;
3542 bool is_16;
3543 static const u32 lrd_size = 32; /* + parameter list header size */
3544
3545 if (cmd[0] == VARIABLE_LENGTH_CMD) {
3546 is_16 = false;
3547 wrprotect = (cmd[10] >> 5) & 0x7;
3548 lbdof = get_unaligned_be16(cmd + 12);
3549 num_lrd = get_unaligned_be16(cmd + 16);
3550 bt_len = get_unaligned_be32(cmd + 28);
3551 } else { /* that leaves WRITE SCATTERED(16) */
3552 is_16 = true;
3553 wrprotect = (cmd[2] >> 5) & 0x7;
3554 lbdof = get_unaligned_be16(cmd + 4);
3555 num_lrd = get_unaligned_be16(cmd + 8);
3556 bt_len = get_unaligned_be32(cmd + 10);
3557 if (unlikely(have_dif_prot)) {
3558 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3559 wrprotect) {
3560 mk_sense_invalid_opcode(scp);
3561 return illegal_condition_result;
3562 }
3563 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3564 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3565 wrprotect == 0)
3566 sdev_printk(KERN_ERR, scp->device,
3567 "Unprotected WR to DIF device\n");
3568 }
3569 }
3570 if ((num_lrd == 0) || (bt_len == 0))
3571 return 0; /* T10 says these do-nothings are not errors */
3572 if (lbdof == 0) {
3573 if (sdebug_verbose)
3574 sdev_printk(KERN_INFO, scp->device,
3575 "%s: %s: LB Data Offset field bad\n",
3576 my_name, __func__);
3577 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3578 return illegal_condition_result;
3579 }
3580 lbdof_blen = lbdof * lb_size;
3581 if ((lrd_size + (num_lrd * lrd_size)) > lbdof_blen) {
3582 if (sdebug_verbose)
3583 sdev_printk(KERN_INFO, scp->device,
3584 "%s: %s: LBA range descriptors don't fit\n",
3585 my_name, __func__);
3586 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3587 return illegal_condition_result;
3588 }
3589 lrdp = kzalloc(lbdof_blen, GFP_ATOMIC);
3590 if (lrdp == NULL)
3591 return SCSI_MLQUEUE_HOST_BUSY;
3592 if (sdebug_verbose)
3593 sdev_printk(KERN_INFO, scp->device,
3594 "%s: %s: Fetch header+scatter_list, lbdof_blen=%u\n",
3595 my_name, __func__, lbdof_blen);
3596 res = fetch_to_dev_buffer(scp, lrdp, lbdof_blen);
3597 if (res == -1) {
3598 ret = DID_ERROR << 16;
3599 goto err_out;
3600 }
3601
3602 write_lock(macc_lckp);
3603 sg_off = lbdof_blen;
3604 /* Spec says Buffer xfer Length field in number of LBs in dout */
3605 cum_lb = 0;
3606 for (k = 0, up = lrdp + lrd_size; k < num_lrd; ++k, up += lrd_size) {
3607 lba = get_unaligned_be64(up + 0);
3608 num = get_unaligned_be32(up + 8);
3609 if (sdebug_verbose)
3610 sdev_printk(KERN_INFO, scp->device,
3611 "%s: %s: k=%d LBA=0x%llx num=%u sg_off=%u\n",
3612 my_name, __func__, k, lba, num, sg_off);
3613 if (num == 0)
3614 continue;
3615 ret = check_device_access_params(scp, lba, num, true);
3616 if (ret)
3617 goto err_out_unlock;
3618 num_by = num * lb_size;
3619 ei_lba = is_16 ? 0 : get_unaligned_be32(up + 12);
3620
3621 if ((cum_lb + num) > bt_len) {
3622 if (sdebug_verbose)
3623 sdev_printk(KERN_INFO, scp->device,
3624 "%s: %s: sum of blocks > data provided\n",
3625 my_name, __func__);
3626 mk_sense_buffer(scp, ILLEGAL_REQUEST, WRITE_ERROR_ASC,
3627 0);
3628 ret = illegal_condition_result;
3629 goto err_out_unlock;
3630 }
3631
3632 /* DIX + T10 DIF */
3633 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3634 int prot_ret = prot_verify_write(scp, lba, num,
3635 ei_lba);
3636
3637 if (prot_ret) {
3638 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10,
3639 prot_ret);
3640 ret = illegal_condition_result;
3641 goto err_out_unlock;
3642 }
3643 }
3644
3645 ret = do_device_access(sip, scp, sg_off, lba, num, true);
3646 /* If ZBC zone then bump its write pointer */
3647 if (sdebug_dev_is_zoned(devip))
3648 zbc_inc_wp(devip, lba, num);
3649 if (unlikely(scsi_debug_lbp()))
3650 map_region(sip, lba, num);
3651 if (unlikely(-1 == ret)) {
3652 ret = DID_ERROR << 16;
3653 goto err_out_unlock;
3654 } else if (unlikely(sdebug_verbose && (ret < num_by)))
3655 sdev_printk(KERN_INFO, scp->device,
3656 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
3657 my_name, num_by, ret);
3658
3659 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
3660 atomic_read(&sdeb_inject_pending))) {
3661 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
3662 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
3663 atomic_set(&sdeb_inject_pending, 0);
3664 ret = check_condition_result;
3665 goto err_out_unlock;
3666 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
3667 /* Logical block guard check failed */
3668 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3669 atomic_set(&sdeb_inject_pending, 0);
3670 ret = illegal_condition_result;
3671 goto err_out_unlock;
3672 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) {
3673 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3674 atomic_set(&sdeb_inject_pending, 0);
3675 ret = illegal_condition_result;
3676 goto err_out_unlock;
3677 }
3678 }
3679 sg_off += num_by;
3680 cum_lb += num;
3681 }
3682 ret = 0;
3683err_out_unlock:
3684 write_unlock(macc_lckp);
3685err_out:
3686 kfree(lrdp);
3687 return ret;
3688}
3689
3690static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num,
3691 u32 ei_lba, bool unmap, bool ndob)
3692{
3693 struct scsi_device *sdp = scp->device;
3694 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
3695 unsigned long long i;
3696 u64 block, lbaa;
3697 u32 lb_size = sdebug_sector_size;
3698 int ret;
3699 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
3700 scp->device->hostdata, true);
3701 rwlock_t *macc_lckp = &sip->macc_lck;
3702 u8 *fs1p;
3703 u8 *fsp;
3704
3705 write_lock(macc_lckp);
3706
3707 ret = check_device_access_params(scp, lba, num, true);
3708 if (ret) {
3709 write_unlock(macc_lckp);
3710 return ret;
3711 }
3712
3713 if (unmap && scsi_debug_lbp()) {
3714 unmap_region(sip, lba, num);
3715 goto out;
3716 }
3717 lbaa = lba;
3718 block = do_div(lbaa, sdebug_store_sectors);
3719 /* if ndob then zero 1 logical block, else fetch 1 logical block */
3720 fsp = sip->storep;
3721 fs1p = fsp + (block * lb_size);
3722 if (ndob) {
3723 memset(fs1p, 0, lb_size);
3724 ret = 0;
3725 } else
3726 ret = fetch_to_dev_buffer(scp, fs1p, lb_size);
3727
3728 if (-1 == ret) {
3729 write_unlock(&sip->macc_lck);
3730 return DID_ERROR << 16;
3731 } else if (sdebug_verbose && !ndob && (ret < lb_size))
3732 sdev_printk(KERN_INFO, scp->device,
3733 "%s: %s: lb size=%u, IO sent=%d bytes\n",
3734 my_name, "write same", lb_size, ret);
3735
3736 /* Copy first sector to remaining blocks */
3737 for (i = 1 ; i < num ; i++) {
3738 lbaa = lba + i;
3739 block = do_div(lbaa, sdebug_store_sectors);
3740 memmove(fsp + (block * lb_size), fs1p, lb_size);
3741 }
3742 if (scsi_debug_lbp())
3743 map_region(sip, lba, num);
3744 /* If ZBC zone then bump its write pointer */
3745 if (sdebug_dev_is_zoned(devip))
3746 zbc_inc_wp(devip, lba, num);
3747out:
3748 write_unlock(macc_lckp);
3749
3750 return 0;
3751}
3752
3753static int resp_write_same_10(struct scsi_cmnd *scp,
3754 struct sdebug_dev_info *devip)
3755{
3756 u8 *cmd = scp->cmnd;
3757 u32 lba;
3758 u16 num;
3759 u32 ei_lba = 0;
3760 bool unmap = false;
3761
3762 if (cmd[1] & 0x8) {
3763 if (sdebug_lbpws10 == 0) {
3764 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3765 return check_condition_result;
3766 } else
3767 unmap = true;
3768 }
3769 lba = get_unaligned_be32(cmd + 2);
3770 num = get_unaligned_be16(cmd + 7);
3771 if (num > sdebug_write_same_length) {
3772 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3773 return check_condition_result;
3774 }
3775 return resp_write_same(scp, lba, num, ei_lba, unmap, false);
3776}
3777
3778static int resp_write_same_16(struct scsi_cmnd *scp,
3779 struct sdebug_dev_info *devip)
3780{
3781 u8 *cmd = scp->cmnd;
3782 u64 lba;
3783 u32 num;
3784 u32 ei_lba = 0;
3785 bool unmap = false;
3786 bool ndob = false;
3787
3788 if (cmd[1] & 0x8) { /* UNMAP */
3789 if (sdebug_lbpws == 0) {
3790 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3791 return check_condition_result;
3792 } else
3793 unmap = true;
3794 }
3795 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */
3796 ndob = true;
3797 lba = get_unaligned_be64(cmd + 2);
3798 num = get_unaligned_be32(cmd + 10);
3799 if (num > sdebug_write_same_length) {
3800 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
3801 return check_condition_result;
3802 }
3803 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob);
3804}
3805
3806/* Note the mode field is in the same position as the (lower) service action
3807 * field. For the Report supported operation codes command, SPC-4 suggests
3808 * each mode of this command should be reported separately; for future. */
3809static int resp_write_buffer(struct scsi_cmnd *scp,
3810 struct sdebug_dev_info *devip)
3811{
3812 u8 *cmd = scp->cmnd;
3813 struct scsi_device *sdp = scp->device;
3814 struct sdebug_dev_info *dp;
3815 u8 mode;
3816
3817 mode = cmd[1] & 0x1f;
3818 switch (mode) {
3819 case 0x4: /* download microcode (MC) and activate (ACT) */
3820 /* set UAs on this device only */
3821 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3822 set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm);
3823 break;
3824 case 0x5: /* download MC, save and ACT */
3825 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm);
3826 break;
3827 case 0x6: /* download MC with offsets and ACT */
3828 /* set UAs on most devices (LUs) in this target */
3829 list_for_each_entry(dp,
3830 &devip->sdbg_host->dev_info_list,
3831 dev_list)
3832 if (dp->target == sdp->id) {
3833 set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm);
3834 if (devip != dp)
3835 set_bit(SDEBUG_UA_MICROCODE_CHANGED,
3836 dp->uas_bm);
3837 }
3838 break;
3839 case 0x7: /* download MC with offsets, save, and ACT */
3840 /* set UA on all devices (LUs) in this target */
3841 list_for_each_entry(dp,
3842 &devip->sdbg_host->dev_info_list,
3843 dev_list)
3844 if (dp->target == sdp->id)
3845 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET,
3846 dp->uas_bm);
3847 break;
3848 default:
3849 /* do nothing for this command for other mode values */
3850 break;
3851 }
3852 return 0;
3853}
3854
3855static int resp_comp_write(struct scsi_cmnd *scp,
3856 struct sdebug_dev_info *devip)
3857{
3858 u8 *cmd = scp->cmnd;
3859 u8 *arr;
3860 struct sdeb_store_info *sip = devip2sip(devip, true);
3861 rwlock_t *macc_lckp = &sip->macc_lck;
3862 u64 lba;
3863 u32 dnum;
3864 u32 lb_size = sdebug_sector_size;
3865 u8 num;
3866 int ret;
3867 int retval = 0;
3868
3869 lba = get_unaligned_be64(cmd + 2);
3870 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */
3871 if (0 == num)
3872 return 0; /* degenerate case, not an error */
3873 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3874 (cmd[1] & 0xe0)) {
3875 mk_sense_invalid_opcode(scp);
3876 return check_condition_result;
3877 }
3878 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3879 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3880 (cmd[1] & 0xe0) == 0)
3881 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3882 "to DIF device\n");
3883 ret = check_device_access_params(scp, lba, num, false);
3884 if (ret)
3885 return ret;
3886 dnum = 2 * num;
3887 arr = kcalloc(lb_size, dnum, GFP_ATOMIC);
3888 if (NULL == arr) {
3889 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3890 INSUFF_RES_ASCQ);
3891 return check_condition_result;
3892 }
3893
3894 write_lock(macc_lckp);
3895
3896 ret = do_dout_fetch(scp, dnum, arr);
3897 if (ret == -1) {
3898 retval = DID_ERROR << 16;
3899 goto cleanup;
3900 } else if (sdebug_verbose && (ret < (dnum * lb_size)))
3901 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb "
3902 "indicated=%u, IO sent=%d bytes\n", my_name,
3903 dnum * lb_size, ret);
3904 if (!comp_write_worker(sip, lba, num, arr, false)) {
3905 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
3906 retval = check_condition_result;
3907 goto cleanup;
3908 }
3909 if (scsi_debug_lbp())
3910 map_region(sip, lba, num);
3911cleanup:
3912 write_unlock(macc_lckp);
3913 kfree(arr);
3914 return retval;
3915}
3916
3917struct unmap_block_desc {
3918 __be64 lba;
3919 __be32 blocks;
3920 __be32 __reserved;
3921};
3922
3923static int resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3924{
3925 unsigned char *buf;
3926 struct unmap_block_desc *desc;
3927 struct sdeb_store_info *sip = devip2sip(devip, true);
3928 rwlock_t *macc_lckp = &sip->macc_lck;
3929 unsigned int i, payload_len, descriptors;
3930 int ret;
3931
3932 if (!scsi_debug_lbp())
3933 return 0; /* fib and say its done */
3934 payload_len = get_unaligned_be16(scp->cmnd + 7);
3935 BUG_ON(scsi_bufflen(scp) != payload_len);
3936
3937 descriptors = (payload_len - 8) / 16;
3938 if (descriptors > sdebug_unmap_max_desc) {
3939 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3940 return check_condition_result;
3941 }
3942
3943 buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC);
3944 if (!buf) {
3945 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3946 INSUFF_RES_ASCQ);
3947 return check_condition_result;
3948 }
3949
3950 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
3951
3952 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
3953 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
3954
3955 desc = (void *)&buf[8];
3956
3957 write_lock(macc_lckp);
3958
3959 for (i = 0 ; i < descriptors ; i++) {
3960 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
3961 unsigned int num = get_unaligned_be32(&desc[i].blocks);
3962
3963 ret = check_device_access_params(scp, lba, num, true);
3964 if (ret)
3965 goto out;
3966
3967 unmap_region(sip, lba, num);
3968 }
3969
3970 ret = 0;
3971
3972out:
3973 write_unlock(macc_lckp);
3974 kfree(buf);
3975
3976 return ret;
3977}
3978
3979#define SDEBUG_GET_LBA_STATUS_LEN 32
3980
3981static int resp_get_lba_status(struct scsi_cmnd *scp,
3982 struct sdebug_dev_info *devip)
3983{
3984 u8 *cmd = scp->cmnd;
3985 u64 lba;
3986 u32 alloc_len, mapped, num;
3987 int ret;
3988 u8 arr[SDEBUG_GET_LBA_STATUS_LEN];
3989
3990 lba = get_unaligned_be64(cmd + 2);
3991 alloc_len = get_unaligned_be32(cmd + 10);
3992
3993 if (alloc_len < 24)
3994 return 0;
3995
3996 ret = check_device_access_params(scp, lba, 1, false);
3997 if (ret)
3998 return ret;
3999
4000 if (scsi_debug_lbp()) {
4001 struct sdeb_store_info *sip = devip2sip(devip, true);
4002
4003 mapped = map_state(sip, lba, &num);
4004 } else {
4005 mapped = 1;
4006 /* following just in case virtual_gb changed */
4007 sdebug_capacity = get_sdebug_capacity();
4008 if (sdebug_capacity - lba <= 0xffffffff)
4009 num = sdebug_capacity - lba;
4010 else
4011 num = 0xffffffff;
4012 }
4013
4014 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
4015 put_unaligned_be32(20, arr); /* Parameter Data Length */
4016 put_unaligned_be64(lba, arr + 8); /* LBA */
4017 put_unaligned_be32(num, arr + 16); /* Number of blocks */
4018 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */
4019
4020 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN);
4021}
4022
4023static int resp_sync_cache(struct scsi_cmnd *scp,
4024 struct sdebug_dev_info *devip)
4025{
4026 int res = 0;
4027 u64 lba;
4028 u32 num_blocks;
4029 u8 *cmd = scp->cmnd;
4030
4031 if (cmd[0] == SYNCHRONIZE_CACHE) { /* 10 byte cdb */
4032 lba = get_unaligned_be32(cmd + 2);
4033 num_blocks = get_unaligned_be16(cmd + 7);
4034 } else { /* SYNCHRONIZE_CACHE(16) */
4035 lba = get_unaligned_be64(cmd + 2);
4036 num_blocks = get_unaligned_be32(cmd + 10);
4037 }
4038 if (lba + num_blocks > sdebug_capacity) {
4039 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4040 return check_condition_result;
4041 }
4042 if (!write_since_sync || (cmd[1] & 0x2))
4043 res = SDEG_RES_IMMED_MASK;
4044 else /* delay if write_since_sync and IMMED clear */
4045 write_since_sync = false;
4046 return res;
4047}
4048
4049/*
4050 * Assuming the LBA+num_blocks is not out-of-range, this function will return
4051 * CONDITION MET if the specified blocks will/have fitted in the cache, and
4052 * a GOOD status otherwise. Model a disk with a big cache and yield
4053 * CONDITION MET. Actually tries to bring range in main memory into the
4054 * cache associated with the CPU(s).
4055 */
4056static int resp_pre_fetch(struct scsi_cmnd *scp,
4057 struct sdebug_dev_info *devip)
4058{
4059 int res = 0;
4060 u64 lba;
4061 u64 block, rest = 0;
4062 u32 nblks;
4063 u8 *cmd = scp->cmnd;
4064 struct sdeb_store_info *sip = devip2sip(devip, true);
4065 rwlock_t *macc_lckp = &sip->macc_lck;
4066 u8 *fsp = sip->storep;
4067
4068 if (cmd[0] == PRE_FETCH) { /* 10 byte cdb */
4069 lba = get_unaligned_be32(cmd + 2);
4070 nblks = get_unaligned_be16(cmd + 7);
4071 } else { /* PRE-FETCH(16) */
4072 lba = get_unaligned_be64(cmd + 2);
4073 nblks = get_unaligned_be32(cmd + 10);
4074 }
4075 if (lba + nblks > sdebug_capacity) {
4076 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4077 return check_condition_result;
4078 }
4079 if (!fsp)
4080 goto fini;
4081 /* PRE-FETCH spec says nothing about LBP or PI so skip them */
4082 block = do_div(lba, sdebug_store_sectors);
4083 if (block + nblks > sdebug_store_sectors)
4084 rest = block + nblks - sdebug_store_sectors;
4085
4086 /* Try to bring the PRE-FETCH range into CPU's cache */
4087 read_lock(macc_lckp);
4088 prefetch_range(fsp + (sdebug_sector_size * block),
4089 (nblks - rest) * sdebug_sector_size);
4090 if (rest)
4091 prefetch_range(fsp, rest * sdebug_sector_size);
4092 read_unlock(macc_lckp);
4093fini:
4094 if (cmd[1] & 0x2)
4095 res = SDEG_RES_IMMED_MASK;
4096 return res | condition_met_result;
4097}
4098
4099#define RL_BUCKET_ELEMS 8
4100
4101/* Even though each pseudo target has a REPORT LUNS "well known logical unit"
4102 * (W-LUN), the normal Linux scanning logic does not associate it with a
4103 * device (e.g. /dev/sg7). The following magic will make that association:
4104 * "cd /sys/class/scsi_host/host<n> ; echo '- - 49409' > scan"
4105 * where <n> is a host number. If there are multiple targets in a host then
4106 * the above will associate a W-LUN to each target. To only get a W-LUN
4107 * for target 2, then use "echo '- 2 49409' > scan" .
4108 */
4109static int resp_report_luns(struct scsi_cmnd *scp,
4110 struct sdebug_dev_info *devip)
4111{
4112 unsigned char *cmd = scp->cmnd;
4113 unsigned int alloc_len;
4114 unsigned char select_report;
4115 u64 lun;
4116 struct scsi_lun *lun_p;
4117 u8 arr[RL_BUCKET_ELEMS * sizeof(struct scsi_lun)];
4118 unsigned int lun_cnt; /* normal LUN count (max: 256) */
4119 unsigned int wlun_cnt; /* report luns W-LUN count */
4120 unsigned int tlun_cnt; /* total LUN count */
4121 unsigned int rlen; /* response length (in bytes) */
4122 int k, j, n, res;
4123 unsigned int off_rsp = 0;
4124 const int sz_lun = sizeof(struct scsi_lun);
4125
4126 clear_luns_changed_on_target(devip);
4127
4128 select_report = cmd[2];
4129 alloc_len = get_unaligned_be32(cmd + 6);
4130
4131 if (alloc_len < 4) {
4132 pr_err("alloc len too small %d\n", alloc_len);
4133 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
4134 return check_condition_result;
4135 }
4136
4137 switch (select_report) {
4138 case 0: /* all LUNs apart from W-LUNs */
4139 lun_cnt = sdebug_max_luns;
4140 wlun_cnt = 0;
4141 break;
4142 case 1: /* only W-LUNs */
4143 lun_cnt = 0;
4144 wlun_cnt = 1;
4145 break;
4146 case 2: /* all LUNs */
4147 lun_cnt = sdebug_max_luns;
4148 wlun_cnt = 1;
4149 break;
4150 case 0x10: /* only administrative LUs */
4151 case 0x11: /* see SPC-5 */
4152 case 0x12: /* only subsiduary LUs owned by referenced LU */
4153 default:
4154 pr_debug("select report invalid %d\n", select_report);
4155 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
4156 return check_condition_result;
4157 }
4158
4159 if (sdebug_no_lun_0 && (lun_cnt > 0))
4160 --lun_cnt;
4161
4162 tlun_cnt = lun_cnt + wlun_cnt;
4163 rlen = tlun_cnt * sz_lun; /* excluding 8 byte header */
4164 scsi_set_resid(scp, scsi_bufflen(scp));
4165 pr_debug("select_report %d luns = %d wluns = %d no_lun0 %d\n",
4166 select_report, lun_cnt, wlun_cnt, sdebug_no_lun_0);
4167
4168 /* loops rely on sizeof response header same as sizeof lun (both 8) */
4169 lun = sdebug_no_lun_0 ? 1 : 0;
4170 for (k = 0, j = 0, res = 0; true; ++k, j = 0) {
4171 memset(arr, 0, sizeof(arr));
4172 lun_p = (struct scsi_lun *)&arr[0];
4173 if (k == 0) {
4174 put_unaligned_be32(rlen, &arr[0]);
4175 ++lun_p;
4176 j = 1;
4177 }
4178 for ( ; j < RL_BUCKET_ELEMS; ++j, ++lun_p) {
4179 if ((k * RL_BUCKET_ELEMS) + j > lun_cnt)
4180 break;
4181 int_to_scsilun(lun++, lun_p);
4182 }
4183 if (j < RL_BUCKET_ELEMS)
4184 break;
4185 n = j * sz_lun;
4186 res = p_fill_from_dev_buffer(scp, arr, n, off_rsp);
4187 if (res)
4188 return res;
4189 off_rsp += n;
4190 }
4191 if (wlun_cnt) {
4192 int_to_scsilun(SCSI_W_LUN_REPORT_LUNS, lun_p);
4193 ++j;
4194 }
4195 if (j > 0)
4196 res = p_fill_from_dev_buffer(scp, arr, j * sz_lun, off_rsp);
4197 return res;
4198}
4199
4200static int resp_verify(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4201{
4202 bool is_bytchk3 = false;
4203 u8 bytchk;
4204 int ret, j;
4205 u32 vnum, a_num, off;
4206 const u32 lb_size = sdebug_sector_size;
4207 u64 lba;
4208 u8 *arr;
4209 u8 *cmd = scp->cmnd;
4210 struct sdeb_store_info *sip = devip2sip(devip, true);
4211 rwlock_t *macc_lckp = &sip->macc_lck;
4212
4213 bytchk = (cmd[1] >> 1) & 0x3;
4214 if (bytchk == 0) {
4215 return 0; /* always claim internal verify okay */
4216 } else if (bytchk == 2) {
4217 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
4218 return check_condition_result;
4219 } else if (bytchk == 3) {
4220 is_bytchk3 = true; /* 1 block sent, compared repeatedly */
4221 }
4222 switch (cmd[0]) {
4223 case VERIFY_16:
4224 lba = get_unaligned_be64(cmd + 2);
4225 vnum = get_unaligned_be32(cmd + 10);
4226 break;
4227 case VERIFY: /* is VERIFY(10) */
4228 lba = get_unaligned_be32(cmd + 2);
4229 vnum = get_unaligned_be16(cmd + 7);
4230 break;
4231 default:
4232 mk_sense_invalid_opcode(scp);
4233 return check_condition_result;
4234 }
4235 a_num = is_bytchk3 ? 1 : vnum;
4236 /* Treat following check like one for read (i.e. no write) access */
4237 ret = check_device_access_params(scp, lba, a_num, false);
4238 if (ret)
4239 return ret;
4240
4241 arr = kcalloc(lb_size, vnum, GFP_ATOMIC);
4242 if (!arr) {
4243 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
4244 INSUFF_RES_ASCQ);
4245 return check_condition_result;
4246 }
4247 /* Not changing store, so only need read access */
4248 read_lock(macc_lckp);
4249
4250 ret = do_dout_fetch(scp, a_num, arr);
4251 if (ret == -1) {
4252 ret = DID_ERROR << 16;
4253 goto cleanup;
4254 } else if (sdebug_verbose && (ret < (a_num * lb_size))) {
4255 sdev_printk(KERN_INFO, scp->device,
4256 "%s: %s: cdb indicated=%u, IO sent=%d bytes\n",
4257 my_name, __func__, a_num * lb_size, ret);
4258 }
4259 if (is_bytchk3) {
4260 for (j = 1, off = lb_size; j < vnum; ++j, off += lb_size)
4261 memcpy(arr + off, arr, lb_size);
4262 }
4263 ret = 0;
4264 if (!comp_write_worker(sip, lba, vnum, arr, true)) {
4265 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
4266 ret = check_condition_result;
4267 goto cleanup;
4268 }
4269cleanup:
4270 read_unlock(macc_lckp);
4271 kfree(arr);
4272 return ret;
4273}
4274
4275#define RZONES_DESC_HD 64
4276
4277/* Report zones depending on start LBA nad reporting options */
4278static int resp_report_zones(struct scsi_cmnd *scp,
4279 struct sdebug_dev_info *devip)
4280{
4281 unsigned int i, max_zones, rep_max_zones, nrz = 0;
4282 int ret = 0;
4283 u32 alloc_len, rep_opts, rep_len;
4284 bool partial;
4285 u64 lba, zs_lba;
4286 u8 *arr = NULL, *desc;
4287 u8 *cmd = scp->cmnd;
4288 struct sdeb_zone_state *zsp;
4289 struct sdeb_store_info *sip = devip2sip(devip, false);
4290 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
4291
4292 if (!sdebug_dev_is_zoned(devip)) {
4293 mk_sense_invalid_opcode(scp);
4294 return check_condition_result;
4295 }
4296 zs_lba = get_unaligned_be64(cmd + 2);
4297 alloc_len = get_unaligned_be32(cmd + 10);
4298 rep_opts = cmd[14] & 0x3f;
4299 partial = cmd[14] & 0x80;
4300
4301 if (zs_lba >= sdebug_capacity) {
4302 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4303 return check_condition_result;
4304 }
4305
4306 max_zones = devip->nr_zones - (zs_lba >> devip->zsize_shift);
4307 rep_max_zones = min((alloc_len - 64) >> ilog2(RZONES_DESC_HD),
4308 max_zones);
4309
4310 arr = kcalloc(RZONES_DESC_HD, alloc_len, GFP_ATOMIC);
4311 if (!arr) {
4312 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
4313 INSUFF_RES_ASCQ);
4314 return check_condition_result;
4315 }
4316
4317 read_lock(macc_lckp);
4318
4319 desc = arr + 64;
4320 for (i = 0; i < max_zones; i++) {
4321 lba = zs_lba + devip->zsize * i;
4322 if (lba > sdebug_capacity)
4323 break;
4324 zsp = zbc_zone(devip, lba);
4325 switch (rep_opts) {
4326 case 0x00:
4327 /* All zones */
4328 break;
4329 case 0x01:
4330 /* Empty zones */
4331 if (zsp->z_cond != ZC1_EMPTY)
4332 continue;
4333 break;
4334 case 0x02:
4335 /* Implicit open zones */
4336 if (zsp->z_cond != ZC2_IMPLICIT_OPEN)
4337 continue;
4338 break;
4339 case 0x03:
4340 /* Explicit open zones */
4341 if (zsp->z_cond != ZC3_EXPLICIT_OPEN)
4342 continue;
4343 break;
4344 case 0x04:
4345 /* Closed zones */
4346 if (zsp->z_cond != ZC4_CLOSED)
4347 continue;
4348 break;
4349 case 0x05:
4350 /* Full zones */
4351 if (zsp->z_cond != ZC5_FULL)
4352 continue;
4353 break;
4354 case 0x06:
4355 case 0x07:
4356 case 0x10:
4357 /*
4358 * Read-only, offline, reset WP recommended are
4359 * not emulated: no zones to report;
4360 */
4361 continue;
4362 case 0x11:
4363 /* non-seq-resource set */
4364 if (!zsp->z_non_seq_resource)
4365 continue;
4366 break;
4367 case 0x3f:
4368 /* Not write pointer (conventional) zones */
4369 if (!zbc_zone_is_conv(zsp))
4370 continue;
4371 break;
4372 default:
4373 mk_sense_buffer(scp, ILLEGAL_REQUEST,
4374 INVALID_FIELD_IN_CDB, 0);
4375 ret = check_condition_result;
4376 goto fini;
4377 }
4378
4379 if (nrz < rep_max_zones) {
4380 /* Fill zone descriptor */
4381 desc[0] = zsp->z_type;
4382 desc[1] = zsp->z_cond << 4;
4383 if (zsp->z_non_seq_resource)
4384 desc[1] |= 1 << 1;
4385 put_unaligned_be64((u64)zsp->z_size, desc + 8);
4386 put_unaligned_be64((u64)zsp->z_start, desc + 16);
4387 put_unaligned_be64((u64)zsp->z_wp, desc + 24);
4388 desc += 64;
4389 }
4390
4391 if (partial && nrz >= rep_max_zones)
4392 break;
4393
4394 nrz++;
4395 }
4396
4397 /* Report header */
4398 put_unaligned_be32(nrz * RZONES_DESC_HD, arr + 0);
4399 put_unaligned_be64(sdebug_capacity - 1, arr + 8);
4400
4401 rep_len = (unsigned long)desc - (unsigned long)arr;
4402 ret = fill_from_dev_buffer(scp, arr, min_t(int, alloc_len, rep_len));
4403
4404fini:
4405 read_unlock(macc_lckp);
4406 kfree(arr);
4407 return ret;
4408}
4409
4410/* Logic transplanted from tcmu-runner, file_zbc.c */
4411static void zbc_open_all(struct sdebug_dev_info *devip)
4412{
4413 struct sdeb_zone_state *zsp = &devip->zstate[0];
4414 unsigned int i;
4415
4416 for (i = 0; i < devip->nr_zones; i++, zsp++) {
4417 if (zsp->z_cond == ZC4_CLOSED)
4418 zbc_open_zone(devip, &devip->zstate[i], true);
4419 }
4420}
4421
4422static int resp_open_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4423{
4424 int res = 0;
4425 u64 z_id;
4426 enum sdebug_z_cond zc;
4427 u8 *cmd = scp->cmnd;
4428 struct sdeb_zone_state *zsp;
4429 bool all = cmd[14] & 0x01;
4430 struct sdeb_store_info *sip = devip2sip(devip, false);
4431 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
4432
4433 if (!sdebug_dev_is_zoned(devip)) {
4434 mk_sense_invalid_opcode(scp);
4435 return check_condition_result;
4436 }
4437
4438 write_lock(macc_lckp);
4439
4440 if (all) {
4441 /* Check if all closed zones can be open */
4442 if (devip->max_open &&
4443 devip->nr_exp_open + devip->nr_closed > devip->max_open) {
4444 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC,
4445 INSUFF_ZONE_ASCQ);
4446 res = check_condition_result;
4447 goto fini;
4448 }
4449 /* Open all closed zones */
4450 zbc_open_all(devip);
4451 goto fini;
4452 }
4453
4454 /* Open the specified zone */
4455 z_id = get_unaligned_be64(cmd + 2);
4456 if (z_id >= sdebug_capacity) {
4457 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4458 res = check_condition_result;
4459 goto fini;
4460 }
4461
4462 zsp = zbc_zone(devip, z_id);
4463 if (z_id != zsp->z_start) {
4464 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4465 res = check_condition_result;
4466 goto fini;
4467 }
4468 if (zbc_zone_is_conv(zsp)) {
4469 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4470 res = check_condition_result;
4471 goto fini;
4472 }
4473
4474 zc = zsp->z_cond;
4475 if (zc == ZC3_EXPLICIT_OPEN || zc == ZC5_FULL)
4476 goto fini;
4477
4478 if (devip->max_open && devip->nr_exp_open >= devip->max_open) {
4479 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC,
4480 INSUFF_ZONE_ASCQ);
4481 res = check_condition_result;
4482 goto fini;
4483 }
4484
4485 zbc_open_zone(devip, zsp, true);
4486fini:
4487 write_unlock(macc_lckp);
4488 return res;
4489}
4490
4491static void zbc_close_all(struct sdebug_dev_info *devip)
4492{
4493 unsigned int i;
4494
4495 for (i = 0; i < devip->nr_zones; i++)
4496 zbc_close_zone(devip, &devip->zstate[i]);
4497}
4498
4499static int resp_close_zone(struct scsi_cmnd *scp,
4500 struct sdebug_dev_info *devip)
4501{
4502 int res = 0;
4503 u64 z_id;
4504 u8 *cmd = scp->cmnd;
4505 struct sdeb_zone_state *zsp;
4506 bool all = cmd[14] & 0x01;
4507 struct sdeb_store_info *sip = devip2sip(devip, false);
4508 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
4509
4510 if (!sdebug_dev_is_zoned(devip)) {
4511 mk_sense_invalid_opcode(scp);
4512 return check_condition_result;
4513 }
4514
4515 write_lock(macc_lckp);
4516
4517 if (all) {
4518 zbc_close_all(devip);
4519 goto fini;
4520 }
4521
4522 /* Close specified zone */
4523 z_id = get_unaligned_be64(cmd + 2);
4524 if (z_id >= sdebug_capacity) {
4525 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4526 res = check_condition_result;
4527 goto fini;
4528 }
4529
4530 zsp = zbc_zone(devip, z_id);
4531 if (z_id != zsp->z_start) {
4532 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4533 res = check_condition_result;
4534 goto fini;
4535 }
4536 if (zbc_zone_is_conv(zsp)) {
4537 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4538 res = check_condition_result;
4539 goto fini;
4540 }
4541
4542 zbc_close_zone(devip, zsp);
4543fini:
4544 write_unlock(macc_lckp);
4545 return res;
4546}
4547
4548static void zbc_finish_zone(struct sdebug_dev_info *devip,
4549 struct sdeb_zone_state *zsp, bool empty)
4550{
4551 enum sdebug_z_cond zc = zsp->z_cond;
4552
4553 if (zc == ZC4_CLOSED || zc == ZC2_IMPLICIT_OPEN ||
4554 zc == ZC3_EXPLICIT_OPEN || (empty && zc == ZC1_EMPTY)) {
4555 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)
4556 zbc_close_zone(devip, zsp);
4557 if (zsp->z_cond == ZC4_CLOSED)
4558 devip->nr_closed--;
4559 zsp->z_wp = zsp->z_start + zsp->z_size;
4560 zsp->z_cond = ZC5_FULL;
4561 }
4562}
4563
4564static void zbc_finish_all(struct sdebug_dev_info *devip)
4565{
4566 unsigned int i;
4567
4568 for (i = 0; i < devip->nr_zones; i++)
4569 zbc_finish_zone(devip, &devip->zstate[i], false);
4570}
4571
4572static int resp_finish_zone(struct scsi_cmnd *scp,
4573 struct sdebug_dev_info *devip)
4574{
4575 struct sdeb_zone_state *zsp;
4576 int res = 0;
4577 u64 z_id;
4578 u8 *cmd = scp->cmnd;
4579 bool all = cmd[14] & 0x01;
4580 struct sdeb_store_info *sip = devip2sip(devip, false);
4581 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
4582
4583 if (!sdebug_dev_is_zoned(devip)) {
4584 mk_sense_invalid_opcode(scp);
4585 return check_condition_result;
4586 }
4587
4588 write_lock(macc_lckp);
4589
4590 if (all) {
4591 zbc_finish_all(devip);
4592 goto fini;
4593 }
4594
4595 /* Finish the specified zone */
4596 z_id = get_unaligned_be64(cmd + 2);
4597 if (z_id >= sdebug_capacity) {
4598 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4599 res = check_condition_result;
4600 goto fini;
4601 }
4602
4603 zsp = zbc_zone(devip, z_id);
4604 if (z_id != zsp->z_start) {
4605 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4606 res = check_condition_result;
4607 goto fini;
4608 }
4609 if (zbc_zone_is_conv(zsp)) {
4610 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4611 res = check_condition_result;
4612 goto fini;
4613 }
4614
4615 zbc_finish_zone(devip, zsp, true);
4616fini:
4617 write_unlock(macc_lckp);
4618 return res;
4619}
4620
4621static void zbc_rwp_zone(struct sdebug_dev_info *devip,
4622 struct sdeb_zone_state *zsp)
4623{
4624 enum sdebug_z_cond zc;
4625
4626 if (zbc_zone_is_conv(zsp))
4627 return;
4628
4629 zc = zsp->z_cond;
4630 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)
4631 zbc_close_zone(devip, zsp);
4632
4633 if (zsp->z_cond == ZC4_CLOSED)
4634 devip->nr_closed--;
4635
4636 zsp->z_non_seq_resource = false;
4637 zsp->z_wp = zsp->z_start;
4638 zsp->z_cond = ZC1_EMPTY;
4639}
4640
4641static void zbc_rwp_all(struct sdebug_dev_info *devip)
4642{
4643 unsigned int i;
4644
4645 for (i = 0; i < devip->nr_zones; i++)
4646 zbc_rwp_zone(devip, &devip->zstate[i]);
4647}
4648
4649static int resp_rwp_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4650{
4651 struct sdeb_zone_state *zsp;
4652 int res = 0;
4653 u64 z_id;
4654 u8 *cmd = scp->cmnd;
4655 bool all = cmd[14] & 0x01;
4656 struct sdeb_store_info *sip = devip2sip(devip, false);
4657 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
4658
4659 if (!sdebug_dev_is_zoned(devip)) {
4660 mk_sense_invalid_opcode(scp);
4661 return check_condition_result;
4662 }
4663
4664 write_lock(macc_lckp);
4665
4666 if (all) {
4667 zbc_rwp_all(devip);
4668 goto fini;
4669 }
4670
4671 z_id = get_unaligned_be64(cmd + 2);
4672 if (z_id >= sdebug_capacity) {
4673 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4674 res = check_condition_result;
4675 goto fini;
4676 }
4677
4678 zsp = zbc_zone(devip, z_id);
4679 if (z_id != zsp->z_start) {
4680 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4681 res = check_condition_result;
4682 goto fini;
4683 }
4684 if (zbc_zone_is_conv(zsp)) {
4685 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4686 res = check_condition_result;
4687 goto fini;
4688 }
4689
4690 zbc_rwp_zone(devip, zsp);
4691fini:
4692 write_unlock(macc_lckp);
4693 return res;
4694}
4695
4696static struct sdebug_queue *get_queue(struct scsi_cmnd *cmnd)
4697{
4698 u16 hwq;
4699
4700 if (sdebug_host_max_queue) {
4701 /* Provide a simple method to choose the hwq */
4702 hwq = smp_processor_id() % submit_queues;
4703 } else {
4704 u32 tag = blk_mq_unique_tag(cmnd->request);
4705
4706 hwq = blk_mq_unique_tag_to_hwq(tag);
4707
4708 pr_debug("tag=%#x, hwq=%d\n", tag, hwq);
4709 if (WARN_ON_ONCE(hwq >= submit_queues))
4710 hwq = 0;
4711 }
4712 return sdebug_q_arr + hwq;
4713}
4714
4715static u32 get_tag(struct scsi_cmnd *cmnd)
4716{
4717 return blk_mq_unique_tag(cmnd->request);
4718}
4719
4720/* Queued (deferred) command completions converge here. */
4721static void sdebug_q_cmd_complete(struct sdebug_defer *sd_dp)
4722{
4723 bool aborted = sd_dp->aborted;
4724 int qc_idx;
4725 int retiring = 0;
4726 unsigned long iflags;
4727 struct sdebug_queue *sqp;
4728 struct sdebug_queued_cmd *sqcp;
4729 struct scsi_cmnd *scp;
4730 struct sdebug_dev_info *devip;
4731
4732 sd_dp->defer_t = SDEB_DEFER_NONE;
4733 if (unlikely(aborted))
4734 sd_dp->aborted = false;
4735 qc_idx = sd_dp->qc_idx;
4736 sqp = sdebug_q_arr + sd_dp->sqa_idx;
4737 if (sdebug_statistics) {
4738 atomic_inc(&sdebug_completions);
4739 if (raw_smp_processor_id() != sd_dp->issuing_cpu)
4740 atomic_inc(&sdebug_miss_cpus);
4741 }
4742 if (unlikely((qc_idx < 0) || (qc_idx >= SDEBUG_CANQUEUE))) {
4743 pr_err("wild qc_idx=%d\n", qc_idx);
4744 return;
4745 }
4746 spin_lock_irqsave(&sqp->qc_lock, iflags);
4747 sqcp = &sqp->qc_arr[qc_idx];
4748 scp = sqcp->a_cmnd;
4749 if (unlikely(scp == NULL)) {
4750 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4751 pr_err("scp is NULL, sqa_idx=%d, qc_idx=%d, hc_idx=%d\n",
4752 sd_dp->sqa_idx, qc_idx, sd_dp->hc_idx);
4753 return;
4754 }
4755 devip = (struct sdebug_dev_info *)scp->device->hostdata;
4756 if (likely(devip))
4757 atomic_dec(&devip->num_in_q);
4758 else
4759 pr_err("devip=NULL\n");
4760 if (unlikely(atomic_read(&retired_max_queue) > 0))
4761 retiring = 1;
4762
4763 sqcp->a_cmnd = NULL;
4764 if (unlikely(!test_and_clear_bit(qc_idx, sqp->in_use_bm))) {
4765 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4766 pr_err("Unexpected completion\n");
4767 return;
4768 }
4769
4770 if (unlikely(retiring)) { /* user has reduced max_queue */
4771 int k, retval;
4772
4773 retval = atomic_read(&retired_max_queue);
4774 if (qc_idx >= retval) {
4775 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4776 pr_err("index %d too large\n", retval);
4777 return;
4778 }
4779 k = find_last_bit(sqp->in_use_bm, retval);
4780 if ((k < sdebug_max_queue) || (k == retval))
4781 atomic_set(&retired_max_queue, 0);
4782 else
4783 atomic_set(&retired_max_queue, k + 1);
4784 }
4785 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4786 if (unlikely(aborted)) {
4787 if (sdebug_verbose)
4788 pr_info("bypassing scsi_done() due to aborted cmd\n");
4789 return;
4790 }
4791 scp->scsi_done(scp); /* callback to mid level */
4792}
4793
4794/* When high resolution timer goes off this function is called. */
4795static enum hrtimer_restart sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
4796{
4797 struct sdebug_defer *sd_dp = container_of(timer, struct sdebug_defer,
4798 hrt);
4799 sdebug_q_cmd_complete(sd_dp);
4800 return HRTIMER_NORESTART;
4801}
4802
4803/* When work queue schedules work, it calls this function. */
4804static void sdebug_q_cmd_wq_complete(struct work_struct *work)
4805{
4806 struct sdebug_defer *sd_dp = container_of(work, struct sdebug_defer,
4807 ew.work);
4808 sdebug_q_cmd_complete(sd_dp);
4809}
4810
4811static bool got_shared_uuid;
4812static uuid_t shared_uuid;
4813
4814static int sdebug_device_create_zones(struct sdebug_dev_info *devip)
4815{
4816 struct sdeb_zone_state *zsp;
4817 sector_t capacity = get_sdebug_capacity();
4818 sector_t zstart = 0;
4819 unsigned int i;
4820
4821 /*
4822 * Set the zone size: if sdeb_zbc_zone_size_mb is not set, figure out
4823 * a zone size allowing for at least 4 zones on the device. Otherwise,
4824 * use the specified zone size checking that at least 2 zones can be
4825 * created for the device.
4826 */
4827 if (!sdeb_zbc_zone_size_mb) {
4828 devip->zsize = (DEF_ZBC_ZONE_SIZE_MB * SZ_1M)
4829 >> ilog2(sdebug_sector_size);
4830 while (capacity < devip->zsize << 2 && devip->zsize >= 2)
4831 devip->zsize >>= 1;
4832 if (devip->zsize < 2) {
4833 pr_err("Device capacity too small\n");
4834 return -EINVAL;
4835 }
4836 } else {
4837 if (!is_power_of_2(sdeb_zbc_zone_size_mb)) {
4838 pr_err("Zone size is not a power of 2\n");
4839 return -EINVAL;
4840 }
4841 devip->zsize = (sdeb_zbc_zone_size_mb * SZ_1M)
4842 >> ilog2(sdebug_sector_size);
4843 if (devip->zsize >= capacity) {
4844 pr_err("Zone size too large for device capacity\n");
4845 return -EINVAL;
4846 }
4847 }
4848
4849 devip->zsize_shift = ilog2(devip->zsize);
4850 devip->nr_zones = (capacity + devip->zsize - 1) >> devip->zsize_shift;
4851
4852 if (sdeb_zbc_nr_conv >= devip->nr_zones) {
4853 pr_err("Number of conventional zones too large\n");
4854 return -EINVAL;
4855 }
4856 devip->nr_conv_zones = sdeb_zbc_nr_conv;
4857
4858 if (devip->zmodel == BLK_ZONED_HM) {
4859 /* zbc_max_open_zones can be 0, meaning "not reported" */
4860 if (sdeb_zbc_max_open >= devip->nr_zones - 1)
4861 devip->max_open = (devip->nr_zones - 1) / 2;
4862 else
4863 devip->max_open = sdeb_zbc_max_open;
4864 }
4865
4866 devip->zstate = kcalloc(devip->nr_zones,
4867 sizeof(struct sdeb_zone_state), GFP_KERNEL);
4868 if (!devip->zstate)
4869 return -ENOMEM;
4870
4871 for (i = 0; i < devip->nr_zones; i++) {
4872 zsp = &devip->zstate[i];
4873
4874 zsp->z_start = zstart;
4875
4876 if (i < devip->nr_conv_zones) {
4877 zsp->z_type = ZBC_ZONE_TYPE_CNV;
4878 zsp->z_cond = ZBC_NOT_WRITE_POINTER;
4879 zsp->z_wp = (sector_t)-1;
4880 } else {
4881 if (devip->zmodel == BLK_ZONED_HM)
4882 zsp->z_type = ZBC_ZONE_TYPE_SWR;
4883 else
4884 zsp->z_type = ZBC_ZONE_TYPE_SWP;
4885 zsp->z_cond = ZC1_EMPTY;
4886 zsp->z_wp = zsp->z_start;
4887 }
4888
4889 if (zsp->z_start + devip->zsize < capacity)
4890 zsp->z_size = devip->zsize;
4891 else
4892 zsp->z_size = capacity - zsp->z_start;
4893
4894 zstart += zsp->z_size;
4895 }
4896
4897 return 0;
4898}
4899
4900static struct sdebug_dev_info *sdebug_device_create(
4901 struct sdebug_host_info *sdbg_host, gfp_t flags)
4902{
4903 struct sdebug_dev_info *devip;
4904
4905 devip = kzalloc(sizeof(*devip), flags);
4906 if (devip) {
4907 if (sdebug_uuid_ctl == 1)
4908 uuid_gen(&devip->lu_name);
4909 else if (sdebug_uuid_ctl == 2) {
4910 if (got_shared_uuid)
4911 devip->lu_name = shared_uuid;
4912 else {
4913 uuid_gen(&shared_uuid);
4914 got_shared_uuid = true;
4915 devip->lu_name = shared_uuid;
4916 }
4917 }
4918 devip->sdbg_host = sdbg_host;
4919 if (sdeb_zbc_in_use) {
4920 devip->zmodel = sdeb_zbc_model;
4921 if (sdebug_device_create_zones(devip)) {
4922 kfree(devip);
4923 return NULL;
4924 }
4925 } else {
4926 devip->zmodel = BLK_ZONED_NONE;
4927 }
4928 devip->sdbg_host = sdbg_host;
4929 devip->create_ts = ktime_get_boottime();
4930 atomic_set(&devip->stopped, (sdeb_tur_ms_to_ready > 0 ? 2 : 0));
4931 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
4932 }
4933 return devip;
4934}
4935
4936static struct sdebug_dev_info *find_build_dev_info(struct scsi_device *sdev)
4937{
4938 struct sdebug_host_info *sdbg_host;
4939 struct sdebug_dev_info *open_devip = NULL;
4940 struct sdebug_dev_info *devip;
4941
4942 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
4943 if (!sdbg_host) {
4944 pr_err("Host info NULL\n");
4945 return NULL;
4946 }
4947 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
4948 if ((devip->used) && (devip->channel == sdev->channel) &&
4949 (devip->target == sdev->id) &&
4950 (devip->lun == sdev->lun))
4951 return devip;
4952 else {
4953 if ((!devip->used) && (!open_devip))
4954 open_devip = devip;
4955 }
4956 }
4957 if (!open_devip) { /* try and make a new one */
4958 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
4959 if (!open_devip) {
4960 pr_err("out of memory at line %d\n", __LINE__);
4961 return NULL;
4962 }
4963 }
4964
4965 open_devip->channel = sdev->channel;
4966 open_devip->target = sdev->id;
4967 open_devip->lun = sdev->lun;
4968 open_devip->sdbg_host = sdbg_host;
4969 atomic_set(&open_devip->num_in_q, 0);
4970 set_bit(SDEBUG_UA_POR, open_devip->uas_bm);
4971 open_devip->used = true;
4972 return open_devip;
4973}
4974
4975static int scsi_debug_slave_alloc(struct scsi_device *sdp)
4976{
4977 if (sdebug_verbose)
4978 pr_info("slave_alloc <%u %u %u %llu>\n",
4979 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
4980 return 0;
4981}
4982
4983static int scsi_debug_slave_configure(struct scsi_device *sdp)
4984{
4985 struct sdebug_dev_info *devip =
4986 (struct sdebug_dev_info *)sdp->hostdata;
4987
4988 if (sdebug_verbose)
4989 pr_info("slave_configure <%u %u %u %llu>\n",
4990 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
4991 if (sdp->host->max_cmd_len != SDEBUG_MAX_CMD_LEN)
4992 sdp->host->max_cmd_len = SDEBUG_MAX_CMD_LEN;
4993 if (devip == NULL) {
4994 devip = find_build_dev_info(sdp);
4995 if (devip == NULL)
4996 return 1; /* no resources, will be marked offline */
4997 }
4998 sdp->hostdata = devip;
4999 if (sdebug_no_uld)
5000 sdp->no_uld_attach = 1;
5001 config_cdb_len(sdp);
5002 return 0;
5003}
5004
5005static void scsi_debug_slave_destroy(struct scsi_device *sdp)
5006{
5007 struct sdebug_dev_info *devip =
5008 (struct sdebug_dev_info *)sdp->hostdata;
5009
5010 if (sdebug_verbose)
5011 pr_info("slave_destroy <%u %u %u %llu>\n",
5012 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
5013 if (devip) {
5014 /* make this slot available for re-use */
5015 devip->used = false;
5016 sdp->hostdata = NULL;
5017 }
5018}
5019
5020static void stop_qc_helper(struct sdebug_defer *sd_dp,
5021 enum sdeb_defer_type defer_t)
5022{
5023 if (!sd_dp)
5024 return;
5025 if (defer_t == SDEB_DEFER_HRT)
5026 hrtimer_cancel(&sd_dp->hrt);
5027 else if (defer_t == SDEB_DEFER_WQ)
5028 cancel_work_sync(&sd_dp->ew.work);
5029}
5030
5031/* If @cmnd found deletes its timer or work queue and returns true; else
5032 returns false */
5033static bool stop_queued_cmnd(struct scsi_cmnd *cmnd)
5034{
5035 unsigned long iflags;
5036 int j, k, qmax, r_qmax;
5037 enum sdeb_defer_type l_defer_t;
5038 struct sdebug_queue *sqp;
5039 struct sdebug_queued_cmd *sqcp;
5040 struct sdebug_dev_info *devip;
5041 struct sdebug_defer *sd_dp;
5042
5043 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
5044 spin_lock_irqsave(&sqp->qc_lock, iflags);
5045 qmax = sdebug_max_queue;
5046 r_qmax = atomic_read(&retired_max_queue);
5047 if (r_qmax > qmax)
5048 qmax = r_qmax;
5049 for (k = 0; k < qmax; ++k) {
5050 if (test_bit(k, sqp->in_use_bm)) {
5051 sqcp = &sqp->qc_arr[k];
5052 if (cmnd != sqcp->a_cmnd)
5053 continue;
5054 /* found */
5055 devip = (struct sdebug_dev_info *)
5056 cmnd->device->hostdata;
5057 if (devip)
5058 atomic_dec(&devip->num_in_q);
5059 sqcp->a_cmnd = NULL;
5060 sd_dp = sqcp->sd_dp;
5061 if (sd_dp) {
5062 l_defer_t = sd_dp->defer_t;
5063 sd_dp->defer_t = SDEB_DEFER_NONE;
5064 } else
5065 l_defer_t = SDEB_DEFER_NONE;
5066 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5067 stop_qc_helper(sd_dp, l_defer_t);
5068 clear_bit(k, sqp->in_use_bm);
5069 return true;
5070 }
5071 }
5072 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5073 }
5074 return false;
5075}
5076
5077/* Deletes (stops) timers or work queues of all queued commands */
5078static void stop_all_queued(void)
5079{
5080 unsigned long iflags;
5081 int j, k;
5082 enum sdeb_defer_type l_defer_t;
5083 struct sdebug_queue *sqp;
5084 struct sdebug_queued_cmd *sqcp;
5085 struct sdebug_dev_info *devip;
5086 struct sdebug_defer *sd_dp;
5087
5088 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
5089 spin_lock_irqsave(&sqp->qc_lock, iflags);
5090 for (k = 0; k < SDEBUG_CANQUEUE; ++k) {
5091 if (test_bit(k, sqp->in_use_bm)) {
5092 sqcp = &sqp->qc_arr[k];
5093 if (sqcp->a_cmnd == NULL)
5094 continue;
5095 devip = (struct sdebug_dev_info *)
5096 sqcp->a_cmnd->device->hostdata;
5097 if (devip)
5098 atomic_dec(&devip->num_in_q);
5099 sqcp->a_cmnd = NULL;
5100 sd_dp = sqcp->sd_dp;
5101 if (sd_dp) {
5102 l_defer_t = sd_dp->defer_t;
5103 sd_dp->defer_t = SDEB_DEFER_NONE;
5104 } else
5105 l_defer_t = SDEB_DEFER_NONE;
5106 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5107 stop_qc_helper(sd_dp, l_defer_t);
5108 clear_bit(k, sqp->in_use_bm);
5109 spin_lock_irqsave(&sqp->qc_lock, iflags);
5110 }
5111 }
5112 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5113 }
5114}
5115
5116/* Free queued command memory on heap */
5117static void free_all_queued(void)
5118{
5119 int j, k;
5120 struct sdebug_queue *sqp;
5121 struct sdebug_queued_cmd *sqcp;
5122
5123 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
5124 for (k = 0; k < SDEBUG_CANQUEUE; ++k) {
5125 sqcp = &sqp->qc_arr[k];
5126 kfree(sqcp->sd_dp);
5127 sqcp->sd_dp = NULL;
5128 }
5129 }
5130}
5131
5132static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
5133{
5134 bool ok;
5135
5136 ++num_aborts;
5137 if (SCpnt) {
5138 ok = stop_queued_cmnd(SCpnt);
5139 if (SCpnt->device && (SDEBUG_OPT_ALL_NOISE & sdebug_opts))
5140 sdev_printk(KERN_INFO, SCpnt->device,
5141 "%s: command%s found\n", __func__,
5142 ok ? "" : " not");
5143 }
5144 return SUCCESS;
5145}
5146
5147static int scsi_debug_device_reset(struct scsi_cmnd *SCpnt)
5148{
5149 ++num_dev_resets;
5150 if (SCpnt && SCpnt->device) {
5151 struct scsi_device *sdp = SCpnt->device;
5152 struct sdebug_dev_info *devip =
5153 (struct sdebug_dev_info *)sdp->hostdata;
5154
5155 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5156 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
5157 if (devip)
5158 set_bit(SDEBUG_UA_POR, devip->uas_bm);
5159 }
5160 return SUCCESS;
5161}
5162
5163static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
5164{
5165 struct sdebug_host_info *sdbg_host;
5166 struct sdebug_dev_info *devip;
5167 struct scsi_device *sdp;
5168 struct Scsi_Host *hp;
5169 int k = 0;
5170
5171 ++num_target_resets;
5172 if (!SCpnt)
5173 goto lie;
5174 sdp = SCpnt->device;
5175 if (!sdp)
5176 goto lie;
5177 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5178 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
5179 hp = sdp->host;
5180 if (!hp)
5181 goto lie;
5182 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
5183 if (sdbg_host) {
5184 list_for_each_entry(devip,
5185 &sdbg_host->dev_info_list,
5186 dev_list)
5187 if (devip->target == sdp->id) {
5188 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
5189 ++k;
5190 }
5191 }
5192 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
5193 sdev_printk(KERN_INFO, sdp,
5194 "%s: %d device(s) found in target\n", __func__, k);
5195lie:
5196 return SUCCESS;
5197}
5198
5199static int scsi_debug_bus_reset(struct scsi_cmnd *SCpnt)
5200{
5201 struct sdebug_host_info *sdbg_host;
5202 struct sdebug_dev_info *devip;
5203 struct scsi_device *sdp;
5204 struct Scsi_Host *hp;
5205 int k = 0;
5206
5207 ++num_bus_resets;
5208 if (!(SCpnt && SCpnt->device))
5209 goto lie;
5210 sdp = SCpnt->device;
5211 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5212 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
5213 hp = sdp->host;
5214 if (hp) {
5215 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
5216 if (sdbg_host) {
5217 list_for_each_entry(devip,
5218 &sdbg_host->dev_info_list,
5219 dev_list) {
5220 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
5221 ++k;
5222 }
5223 }
5224 }
5225 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
5226 sdev_printk(KERN_INFO, sdp,
5227 "%s: %d device(s) found in host\n", __func__, k);
5228lie:
5229 return SUCCESS;
5230}
5231
5232static int scsi_debug_host_reset(struct scsi_cmnd *SCpnt)
5233{
5234 struct sdebug_host_info *sdbg_host;
5235 struct sdebug_dev_info *devip;
5236 int k = 0;
5237
5238 ++num_host_resets;
5239 if ((SCpnt->device) && (SDEBUG_OPT_ALL_NOISE & sdebug_opts))
5240 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
5241 spin_lock(&sdebug_host_list_lock);
5242 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
5243 list_for_each_entry(devip, &sdbg_host->dev_info_list,
5244 dev_list) {
5245 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
5246 ++k;
5247 }
5248 }
5249 spin_unlock(&sdebug_host_list_lock);
5250 stop_all_queued();
5251 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
5252 sdev_printk(KERN_INFO, SCpnt->device,
5253 "%s: %d device(s) found\n", __func__, k);
5254 return SUCCESS;
5255}
5256
5257static void sdebug_build_parts(unsigned char *ramp, unsigned long store_size)
5258{
5259 struct msdos_partition *pp;
5260 int starts[SDEBUG_MAX_PARTS + 2];
5261 int sectors_per_part, num_sectors, k;
5262 int heads_by_sects, start_sec, end_sec;
5263
5264 /* assume partition table already zeroed */
5265 if ((sdebug_num_parts < 1) || (store_size < 1048576))
5266 return;
5267 if (sdebug_num_parts > SDEBUG_MAX_PARTS) {
5268 sdebug_num_parts = SDEBUG_MAX_PARTS;
5269 pr_warn("reducing partitions to %d\n", SDEBUG_MAX_PARTS);
5270 }
5271 num_sectors = (int)sdebug_store_sectors;
5272 sectors_per_part = (num_sectors - sdebug_sectors_per)
5273 / sdebug_num_parts;
5274 heads_by_sects = sdebug_heads * sdebug_sectors_per;
5275 starts[0] = sdebug_sectors_per;
5276 for (k = 1; k < sdebug_num_parts; ++k)
5277 starts[k] = ((k * sectors_per_part) / heads_by_sects)
5278 * heads_by_sects;
5279 starts[sdebug_num_parts] = num_sectors;
5280 starts[sdebug_num_parts + 1] = 0;
5281
5282 ramp[510] = 0x55; /* magic partition markings */
5283 ramp[511] = 0xAA;
5284 pp = (struct msdos_partition *)(ramp + 0x1be);
5285 for (k = 0; starts[k + 1]; ++k, ++pp) {
5286 start_sec = starts[k];
5287 end_sec = starts[k + 1] - 1;
5288 pp->boot_ind = 0;
5289
5290 pp->cyl = start_sec / heads_by_sects;
5291 pp->head = (start_sec - (pp->cyl * heads_by_sects))
5292 / sdebug_sectors_per;
5293 pp->sector = (start_sec % sdebug_sectors_per) + 1;
5294
5295 pp->end_cyl = end_sec / heads_by_sects;
5296 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
5297 / sdebug_sectors_per;
5298 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
5299
5300 pp->start_sect = cpu_to_le32(start_sec);
5301 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
5302 pp->sys_ind = 0x83; /* plain Linux partition */
5303 }
5304}
5305
5306static void block_unblock_all_queues(bool block)
5307{
5308 int j;
5309 struct sdebug_queue *sqp;
5310
5311 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp)
5312 atomic_set(&sqp->blocked, (int)block);
5313}
5314
5315/* Adjust (by rounding down) the sdebug_cmnd_count so abs(every_nth)-1
5316 * commands will be processed normally before triggers occur.
5317 */
5318static void tweak_cmnd_count(void)
5319{
5320 int count, modulo;
5321
5322 modulo = abs(sdebug_every_nth);
5323 if (modulo < 2)
5324 return;
5325 block_unblock_all_queues(true);
5326 count = atomic_read(&sdebug_cmnd_count);
5327 atomic_set(&sdebug_cmnd_count, (count / modulo) * modulo);
5328 block_unblock_all_queues(false);
5329}
5330
5331static void clear_queue_stats(void)
5332{
5333 atomic_set(&sdebug_cmnd_count, 0);
5334 atomic_set(&sdebug_completions, 0);
5335 atomic_set(&sdebug_miss_cpus, 0);
5336 atomic_set(&sdebug_a_tsf, 0);
5337}
5338
5339static bool inject_on_this_cmd(void)
5340{
5341 if (sdebug_every_nth == 0)
5342 return false;
5343 return (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth)) == 0;
5344}
5345
5346#define INCLUSIVE_TIMING_MAX_NS 1000000 /* 1 millisecond */
5347
5348/* Complete the processing of the thread that queued a SCSI command to this
5349 * driver. It either completes the command by calling cmnd_done() or
5350 * schedules a hr timer or work queue then returns 0. Returns
5351 * SCSI_MLQUEUE_HOST_BUSY if temporarily out of resources.
5352 */
5353static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
5354 int scsi_result,
5355 int (*pfp)(struct scsi_cmnd *,
5356 struct sdebug_dev_info *),
5357 int delta_jiff, int ndelay)
5358{
5359 bool new_sd_dp;
5360 bool inject = false;
5361 int k, num_in_q, qdepth;
5362 unsigned long iflags;
5363 u64 ns_from_boot = 0;
5364 struct sdebug_queue *sqp;
5365 struct sdebug_queued_cmd *sqcp;
5366 struct scsi_device *sdp;
5367 struct sdebug_defer *sd_dp;
5368
5369 if (unlikely(devip == NULL)) {
5370 if (scsi_result == 0)
5371 scsi_result = DID_NO_CONNECT << 16;
5372 goto respond_in_thread;
5373 }
5374 sdp = cmnd->device;
5375
5376 if (delta_jiff == 0)
5377 goto respond_in_thread;
5378
5379 sqp = get_queue(cmnd);
5380 spin_lock_irqsave(&sqp->qc_lock, iflags);
5381 if (unlikely(atomic_read(&sqp->blocked))) {
5382 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5383 return SCSI_MLQUEUE_HOST_BUSY;
5384 }
5385 num_in_q = atomic_read(&devip->num_in_q);
5386 qdepth = cmnd->device->queue_depth;
5387 if (unlikely((qdepth > 0) && (num_in_q >= qdepth))) {
5388 if (scsi_result) {
5389 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5390 goto respond_in_thread;
5391 } else
5392 scsi_result = device_qfull_result;
5393 } else if (unlikely(sdebug_every_nth &&
5394 (SDEBUG_OPT_RARE_TSF & sdebug_opts) &&
5395 (scsi_result == 0))) {
5396 if ((num_in_q == (qdepth - 1)) &&
5397 (atomic_inc_return(&sdebug_a_tsf) >=
5398 abs(sdebug_every_nth))) {
5399 atomic_set(&sdebug_a_tsf, 0);
5400 inject = true;
5401 scsi_result = device_qfull_result;
5402 }
5403 }
5404
5405 k = find_first_zero_bit(sqp->in_use_bm, sdebug_max_queue);
5406 if (unlikely(k >= sdebug_max_queue)) {
5407 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5408 if (scsi_result)
5409 goto respond_in_thread;
5410 else if (SDEBUG_OPT_ALL_TSF & sdebug_opts)
5411 scsi_result = device_qfull_result;
5412 if (SDEBUG_OPT_Q_NOISE & sdebug_opts)
5413 sdev_printk(KERN_INFO, sdp,
5414 "%s: max_queue=%d exceeded, %s\n",
5415 __func__, sdebug_max_queue,
5416 (scsi_result ? "status: TASK SET FULL" :
5417 "report: host busy"));
5418 if (scsi_result)
5419 goto respond_in_thread;
5420 else
5421 return SCSI_MLQUEUE_HOST_BUSY;
5422 }
5423 set_bit(k, sqp->in_use_bm);
5424 atomic_inc(&devip->num_in_q);
5425 sqcp = &sqp->qc_arr[k];
5426 sqcp->a_cmnd = cmnd;
5427 cmnd->host_scribble = (unsigned char *)sqcp;
5428 sd_dp = sqcp->sd_dp;
5429 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5430 if (!sd_dp) {
5431 sd_dp = kzalloc(sizeof(*sd_dp), GFP_ATOMIC);
5432 if (!sd_dp) {
5433 atomic_dec(&devip->num_in_q);
5434 clear_bit(k, sqp->in_use_bm);
5435 return SCSI_MLQUEUE_HOST_BUSY;
5436 }
5437 new_sd_dp = true;
5438 } else {
5439 new_sd_dp = false;
5440 }
5441
5442 /* Set the hostwide tag */
5443 if (sdebug_host_max_queue)
5444 sd_dp->hc_idx = get_tag(cmnd);
5445
5446 if (ndelay > 0 && ndelay < INCLUSIVE_TIMING_MAX_NS)
5447 ns_from_boot = ktime_get_boottime_ns();
5448
5449 /* one of the resp_*() response functions is called here */
5450 cmnd->result = pfp ? pfp(cmnd, devip) : 0;
5451 if (cmnd->result & SDEG_RES_IMMED_MASK) {
5452 cmnd->result &= ~SDEG_RES_IMMED_MASK;
5453 delta_jiff = ndelay = 0;
5454 }
5455 if (cmnd->result == 0 && scsi_result != 0)
5456 cmnd->result = scsi_result;
5457 if (cmnd->result == 0 && unlikely(sdebug_opts & SDEBUG_OPT_TRANSPORT_ERR)) {
5458 if (atomic_read(&sdeb_inject_pending)) {
5459 mk_sense_buffer(cmnd, ABORTED_COMMAND, TRANSPORT_PROBLEM, ACK_NAK_TO);
5460 atomic_set(&sdeb_inject_pending, 0);
5461 cmnd->result = check_condition_result;
5462 }
5463 }
5464
5465 if (unlikely(sdebug_verbose && cmnd->result))
5466 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
5467 __func__, cmnd->result);
5468
5469 if (delta_jiff > 0 || ndelay > 0) {
5470 ktime_t kt;
5471
5472 if (delta_jiff > 0) {
5473 u64 ns = jiffies_to_nsecs(delta_jiff);
5474
5475 if (sdebug_random && ns < U32_MAX) {
5476 ns = prandom_u32_max((u32)ns);
5477 } else if (sdebug_random) {
5478 ns >>= 12; /* scale to 4 usec precision */
5479 if (ns < U32_MAX) /* over 4 hours max */
5480 ns = prandom_u32_max((u32)ns);
5481 ns <<= 12;
5482 }
5483 kt = ns_to_ktime(ns);
5484 } else { /* ndelay has a 4.2 second max */
5485 kt = sdebug_random ? prandom_u32_max((u32)ndelay) :
5486 (u32)ndelay;
5487 if (ndelay < INCLUSIVE_TIMING_MAX_NS) {
5488 u64 d = ktime_get_boottime_ns() - ns_from_boot;
5489
5490 if (kt <= d) { /* elapsed duration >= kt */
5491 spin_lock_irqsave(&sqp->qc_lock, iflags);
5492 sqcp->a_cmnd = NULL;
5493 atomic_dec(&devip->num_in_q);
5494 clear_bit(k, sqp->in_use_bm);
5495 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5496 if (new_sd_dp)
5497 kfree(sd_dp);
5498 /* call scsi_done() from this thread */
5499 cmnd->scsi_done(cmnd);
5500 return 0;
5501 }
5502 /* otherwise reduce kt by elapsed time */
5503 kt -= d;
5504 }
5505 }
5506 if (!sd_dp->init_hrt) {
5507 sd_dp->init_hrt = true;
5508 sqcp->sd_dp = sd_dp;
5509 hrtimer_init(&sd_dp->hrt, CLOCK_MONOTONIC,
5510 HRTIMER_MODE_REL_PINNED);
5511 sd_dp->hrt.function = sdebug_q_cmd_hrt_complete;
5512 sd_dp->sqa_idx = sqp - sdebug_q_arr;
5513 sd_dp->qc_idx = k;
5514 }
5515 if (sdebug_statistics)
5516 sd_dp->issuing_cpu = raw_smp_processor_id();
5517 sd_dp->defer_t = SDEB_DEFER_HRT;
5518 /* schedule the invocation of scsi_done() for a later time */
5519 hrtimer_start(&sd_dp->hrt, kt, HRTIMER_MODE_REL_PINNED);
5520 } else { /* jdelay < 0, use work queue */
5521 if (!sd_dp->init_wq) {
5522 sd_dp->init_wq = true;
5523 sqcp->sd_dp = sd_dp;
5524 sd_dp->sqa_idx = sqp - sdebug_q_arr;
5525 sd_dp->qc_idx = k;
5526 INIT_WORK(&sd_dp->ew.work, sdebug_q_cmd_wq_complete);
5527 }
5528 if (sdebug_statistics)
5529 sd_dp->issuing_cpu = raw_smp_processor_id();
5530 sd_dp->defer_t = SDEB_DEFER_WQ;
5531 if (unlikely((sdebug_opts & SDEBUG_OPT_CMD_ABORT) &&
5532 atomic_read(&sdeb_inject_pending)))
5533 sd_dp->aborted = true;
5534 schedule_work(&sd_dp->ew.work);
5535 if (unlikely((sdebug_opts & SDEBUG_OPT_CMD_ABORT) &&
5536 atomic_read(&sdeb_inject_pending))) {
5537 sdev_printk(KERN_INFO, sdp, "abort request tag %d\n", cmnd->request->tag);
5538 blk_abort_request(cmnd->request);
5539 atomic_set(&sdeb_inject_pending, 0);
5540 }
5541 }
5542 if (unlikely((SDEBUG_OPT_Q_NOISE & sdebug_opts) && scsi_result == device_qfull_result))
5543 sdev_printk(KERN_INFO, sdp, "%s: num_in_q=%d +1, %s%s\n", __func__,
5544 num_in_q, (inject ? "<inject> " : ""), "status: TASK SET FULL");
5545 return 0;
5546
5547respond_in_thread: /* call back to mid-layer using invocation thread */
5548 cmnd->result = pfp != NULL ? pfp(cmnd, devip) : 0;
5549 cmnd->result &= ~SDEG_RES_IMMED_MASK;
5550 if (cmnd->result == 0 && scsi_result != 0)
5551 cmnd->result = scsi_result;
5552 cmnd->scsi_done(cmnd);
5553 return 0;
5554}
5555
5556/* Note: The following macros create attribute files in the
5557 /sys/module/scsi_debug/parameters directory. Unfortunately this
5558 driver is unaware of a change and cannot trigger auxiliary actions
5559 as it can when the corresponding attribute in the
5560 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
5561 */
5562module_param_named(add_host, sdebug_add_host, int, S_IRUGO | S_IWUSR);
5563module_param_named(ato, sdebug_ato, int, S_IRUGO);
5564module_param_named(cdb_len, sdebug_cdb_len, int, 0644);
5565module_param_named(clustering, sdebug_clustering, bool, S_IRUGO | S_IWUSR);
5566module_param_named(delay, sdebug_jdelay, int, S_IRUGO | S_IWUSR);
5567module_param_named(dev_size_mb, sdebug_dev_size_mb, int, S_IRUGO);
5568module_param_named(dif, sdebug_dif, int, S_IRUGO);
5569module_param_named(dix, sdebug_dix, int, S_IRUGO);
5570module_param_named(dsense, sdebug_dsense, int, S_IRUGO | S_IWUSR);
5571module_param_named(every_nth, sdebug_every_nth, int, S_IRUGO | S_IWUSR);
5572module_param_named(fake_rw, sdebug_fake_rw, int, S_IRUGO | S_IWUSR);
5573module_param_named(guard, sdebug_guard, uint, S_IRUGO);
5574module_param_named(host_lock, sdebug_host_lock, bool, S_IRUGO | S_IWUSR);
5575module_param_named(host_max_queue, sdebug_host_max_queue, int, S_IRUGO);
5576module_param_string(inq_product, sdebug_inq_product_id,
5577 sizeof(sdebug_inq_product_id), S_IRUGO | S_IWUSR);
5578module_param_string(inq_rev, sdebug_inq_product_rev,
5579 sizeof(sdebug_inq_product_rev), S_IRUGO | S_IWUSR);
5580module_param_string(inq_vendor, sdebug_inq_vendor_id,
5581 sizeof(sdebug_inq_vendor_id), S_IRUGO | S_IWUSR);
5582module_param_named(lbprz, sdebug_lbprz, int, S_IRUGO);
5583module_param_named(lbpu, sdebug_lbpu, int, S_IRUGO);
5584module_param_named(lbpws, sdebug_lbpws, int, S_IRUGO);
5585module_param_named(lbpws10, sdebug_lbpws10, int, S_IRUGO);
5586module_param_named(lowest_aligned, sdebug_lowest_aligned, int, S_IRUGO);
5587module_param_named(max_luns, sdebug_max_luns, int, S_IRUGO | S_IWUSR);
5588module_param_named(max_queue, sdebug_max_queue, int, S_IRUGO | S_IWUSR);
5589module_param_named(medium_error_count, sdebug_medium_error_count, int,
5590 S_IRUGO | S_IWUSR);
5591module_param_named(medium_error_start, sdebug_medium_error_start, int,
5592 S_IRUGO | S_IWUSR);
5593module_param_named(ndelay, sdebug_ndelay, int, S_IRUGO | S_IWUSR);
5594module_param_named(no_lun_0, sdebug_no_lun_0, int, S_IRUGO | S_IWUSR);
5595module_param_named(no_uld, sdebug_no_uld, int, S_IRUGO);
5596module_param_named(num_parts, sdebug_num_parts, int, S_IRUGO);
5597module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR);
5598module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO);
5599module_param_named(opt_xferlen_exp, sdebug_opt_xferlen_exp, int, S_IRUGO);
5600module_param_named(opts, sdebug_opts, int, S_IRUGO | S_IWUSR);
5601module_param_named(per_host_store, sdebug_per_host_store, bool,
5602 S_IRUGO | S_IWUSR);
5603module_param_named(physblk_exp, sdebug_physblk_exp, int, S_IRUGO);
5604module_param_named(ptype, sdebug_ptype, int, S_IRUGO | S_IWUSR);
5605module_param_named(random, sdebug_random, bool, S_IRUGO | S_IWUSR);
5606module_param_named(removable, sdebug_removable, bool, S_IRUGO | S_IWUSR);
5607module_param_named(scsi_level, sdebug_scsi_level, int, S_IRUGO);
5608module_param_named(sector_size, sdebug_sector_size, int, S_IRUGO);
5609module_param_named(statistics, sdebug_statistics, bool, S_IRUGO | S_IWUSR);
5610module_param_named(strict, sdebug_strict, bool, S_IRUGO | S_IWUSR);
5611module_param_named(submit_queues, submit_queues, int, S_IRUGO);
5612module_param_named(tur_ms_to_ready, sdeb_tur_ms_to_ready, int, S_IRUGO);
5613module_param_named(unmap_alignment, sdebug_unmap_alignment, int, S_IRUGO);
5614module_param_named(unmap_granularity, sdebug_unmap_granularity, int, S_IRUGO);
5615module_param_named(unmap_max_blocks, sdebug_unmap_max_blocks, int, S_IRUGO);
5616module_param_named(unmap_max_desc, sdebug_unmap_max_desc, int, S_IRUGO);
5617module_param_named(uuid_ctl, sdebug_uuid_ctl, int, S_IRUGO);
5618module_param_named(virtual_gb, sdebug_virtual_gb, int, S_IRUGO | S_IWUSR);
5619module_param_named(vpd_use_hostno, sdebug_vpd_use_hostno, int,
5620 S_IRUGO | S_IWUSR);
5621module_param_named(wp, sdebug_wp, bool, S_IRUGO | S_IWUSR);
5622module_param_named(write_same_length, sdebug_write_same_length, int,
5623 S_IRUGO | S_IWUSR);
5624module_param_named(zbc, sdeb_zbc_model_s, charp, S_IRUGO);
5625module_param_named(zone_max_open, sdeb_zbc_max_open, int, S_IRUGO);
5626module_param_named(zone_nr_conv, sdeb_zbc_nr_conv, int, S_IRUGO);
5627module_param_named(zone_size_mb, sdeb_zbc_zone_size_mb, int, S_IRUGO);
5628
5629MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
5630MODULE_DESCRIPTION("SCSI debug adapter driver");
5631MODULE_LICENSE("GPL");
5632MODULE_VERSION(SDEBUG_VERSION);
5633
5634MODULE_PARM_DESC(add_host, "add n hosts, in sysfs if negative remove host(s) (def=1)");
5635MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
5636MODULE_PARM_DESC(cdb_len, "suggest CDB lengths to drivers (def=10)");
5637MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
5638MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
5639MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)");
5640MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
5641MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
5642MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
5643MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
5644MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
5645MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
5646MODULE_PARM_DESC(host_lock, "host_lock is ignored (def=0)");
5647MODULE_PARM_DESC(host_max_queue,
5648 "host max # of queued cmds (0 to max(def) [max_queue fixed equal for !0])");
5649MODULE_PARM_DESC(inq_product, "SCSI INQUIRY product string (def=\"scsi_debug\")");
5650MODULE_PARM_DESC(inq_rev, "SCSI INQUIRY revision string (def=\""
5651 SDEBUG_VERSION "\")");
5652MODULE_PARM_DESC(inq_vendor, "SCSI INQUIRY vendor string (def=\"Linux\")");
5653MODULE_PARM_DESC(lbprz,
5654 "on read unmapped LBs return 0 when 1 (def), return 0xff when 2");
5655MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
5656MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
5657MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
5658MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
5659MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
5660MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
5661MODULE_PARM_DESC(medium_error_count, "count of sectors to return follow on MEDIUM error");
5662MODULE_PARM_DESC(medium_error_start, "starting sector number to return MEDIUM error");
5663MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
5664MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
5665MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
5666MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
5667MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
5668MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)");
5669MODULE_PARM_DESC(opt_xferlen_exp, "optimal transfer length granularity exponent (def=physblk_exp)");
5670MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
5671MODULE_PARM_DESC(per_host_store, "If set, next positive add_host will get new store (def=0)");
5672MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
5673MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
5674MODULE_PARM_DESC(random, "If set, uniformly randomize command duration between 0 and delay_in_ns");
5675MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
5676MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=7[SPC-5])");
5677MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
5678MODULE_PARM_DESC(statistics, "collect statistics on commands, queues (def=0)");
5679MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)");
5680MODULE_PARM_DESC(submit_queues, "support for block multi-queue (def=1)");
5681MODULE_PARM_DESC(tur_ms_to_ready, "TEST UNIT READY millisecs before initial good status (def=0)");
5682MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
5683MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
5684MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
5685MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
5686MODULE_PARM_DESC(uuid_ctl,
5687 "1->use uuid for lu name, 0->don't, 2->all use same (def=0)");
5688MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)");
5689MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
5690MODULE_PARM_DESC(wp, "Write Protect (def=0)");
5691MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
5692MODULE_PARM_DESC(zbc, "'none' [0]; 'aware' [1]; 'managed' [2] (def=0). Can have 'host-' prefix");
5693MODULE_PARM_DESC(zone_max_open, "Maximum number of open zones; [0] for no limit (def=auto)");
5694MODULE_PARM_DESC(zone_nr_conv, "Number of conventional zones (def=1)");
5695MODULE_PARM_DESC(zone_size_mb, "Zone size in MiB (def=auto)");
5696
5697#define SDEBUG_INFO_LEN 256
5698static char sdebug_info[SDEBUG_INFO_LEN];
5699
5700static const char *scsi_debug_info(struct Scsi_Host *shp)
5701{
5702 int k;
5703
5704 k = scnprintf(sdebug_info, SDEBUG_INFO_LEN, "%s: version %s [%s]\n",
5705 my_name, SDEBUG_VERSION, sdebug_version_date);
5706 if (k >= (SDEBUG_INFO_LEN - 1))
5707 return sdebug_info;
5708 scnprintf(sdebug_info + k, SDEBUG_INFO_LEN - k,
5709 " dev_size_mb=%d, opts=0x%x, submit_queues=%d, %s=%d",
5710 sdebug_dev_size_mb, sdebug_opts, submit_queues,
5711 "statistics", (int)sdebug_statistics);
5712 return sdebug_info;
5713}
5714
5715/* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */
5716static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer,
5717 int length)
5718{
5719 char arr[16];
5720 int opts;
5721 int minLen = length > 15 ? 15 : length;
5722
5723 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
5724 return -EACCES;
5725 memcpy(arr, buffer, minLen);
5726 arr[minLen] = '\0';
5727 if (1 != sscanf(arr, "%d", &opts))
5728 return -EINVAL;
5729 sdebug_opts = opts;
5730 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
5731 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
5732 if (sdebug_every_nth != 0)
5733 tweak_cmnd_count();
5734 return length;
5735}
5736
5737/* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the
5738 * same for each scsi_debug host (if more than one). Some of the counters
5739 * output are not atomics so might be inaccurate in a busy system. */
5740static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
5741{
5742 int f, j, l;
5743 struct sdebug_queue *sqp;
5744 struct sdebug_host_info *sdhp;
5745
5746 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n",
5747 SDEBUG_VERSION, sdebug_version_date);
5748 seq_printf(m, "num_tgts=%d, %ssize=%d MB, opts=0x%x, every_nth=%d\n",
5749 sdebug_num_tgts, "shared (ram) ", sdebug_dev_size_mb,
5750 sdebug_opts, sdebug_every_nth);
5751 seq_printf(m, "delay=%d, ndelay=%d, max_luns=%d, sector_size=%d %s\n",
5752 sdebug_jdelay, sdebug_ndelay, sdebug_max_luns,
5753 sdebug_sector_size, "bytes");
5754 seq_printf(m, "cylinders=%d, heads=%d, sectors=%d, command aborts=%d\n",
5755 sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per,
5756 num_aborts);
5757 seq_printf(m, "RESETs: device=%d, target=%d, bus=%d, host=%d\n",
5758 num_dev_resets, num_target_resets, num_bus_resets,
5759 num_host_resets);
5760 seq_printf(m, "dix_reads=%d, dix_writes=%d, dif_errors=%d\n",
5761 dix_reads, dix_writes, dif_errors);
5762 seq_printf(m, "usec_in_jiffy=%lu, statistics=%d\n", TICK_NSEC / 1000,
5763 sdebug_statistics);
5764 seq_printf(m, "cmnd_count=%d, completions=%d, %s=%d, a_tsf=%d\n",
5765 atomic_read(&sdebug_cmnd_count),
5766 atomic_read(&sdebug_completions),
5767 "miss_cpus", atomic_read(&sdebug_miss_cpus),
5768 atomic_read(&sdebug_a_tsf));
5769
5770 seq_printf(m, "submit_queues=%d\n", submit_queues);
5771 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
5772 seq_printf(m, " queue %d:\n", j);
5773 f = find_first_bit(sqp->in_use_bm, sdebug_max_queue);
5774 if (f != sdebug_max_queue) {
5775 l = find_last_bit(sqp->in_use_bm, sdebug_max_queue);
5776 seq_printf(m, " in_use_bm BUSY: %s: %d,%d\n",
5777 "first,last bits", f, l);
5778 }
5779 }
5780
5781 seq_printf(m, "this host_no=%d\n", host->host_no);
5782 if (!xa_empty(per_store_ap)) {
5783 bool niu;
5784 int idx;
5785 unsigned long l_idx;
5786 struct sdeb_store_info *sip;
5787
5788 seq_puts(m, "\nhost list:\n");
5789 j = 0;
5790 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
5791 idx = sdhp->si_idx;
5792 seq_printf(m, " %d: host_no=%d, si_idx=%d\n", j,
5793 sdhp->shost->host_no, idx);
5794 ++j;
5795 }
5796 seq_printf(m, "\nper_store array [most_recent_idx=%d]:\n",
5797 sdeb_most_recent_idx);
5798 j = 0;
5799 xa_for_each(per_store_ap, l_idx, sip) {
5800 niu = xa_get_mark(per_store_ap, l_idx,
5801 SDEB_XA_NOT_IN_USE);
5802 idx = (int)l_idx;
5803 seq_printf(m, " %d: idx=%d%s\n", j, idx,
5804 (niu ? " not_in_use" : ""));
5805 ++j;
5806 }
5807 }
5808 return 0;
5809}
5810
5811static ssize_t delay_show(struct device_driver *ddp, char *buf)
5812{
5813 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_jdelay);
5814}
5815/* Returns -EBUSY if jdelay is being changed and commands are queued. The unit
5816 * of delay is jiffies.
5817 */
5818static ssize_t delay_store(struct device_driver *ddp, const char *buf,
5819 size_t count)
5820{
5821 int jdelay, res;
5822
5823 if (count > 0 && sscanf(buf, "%d", &jdelay) == 1) {
5824 res = count;
5825 if (sdebug_jdelay != jdelay) {
5826 int j, k;
5827 struct sdebug_queue *sqp;
5828
5829 block_unblock_all_queues(true);
5830 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
5831 ++j, ++sqp) {
5832 k = find_first_bit(sqp->in_use_bm,
5833 sdebug_max_queue);
5834 if (k != sdebug_max_queue) {
5835 res = -EBUSY; /* queued commands */
5836 break;
5837 }
5838 }
5839 if (res > 0) {
5840 sdebug_jdelay = jdelay;
5841 sdebug_ndelay = 0;
5842 }
5843 block_unblock_all_queues(false);
5844 }
5845 return res;
5846 }
5847 return -EINVAL;
5848}
5849static DRIVER_ATTR_RW(delay);
5850
5851static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
5852{
5853 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ndelay);
5854}
5855/* Returns -EBUSY if ndelay is being changed and commands are queued */
5856/* If > 0 and accepted then sdebug_jdelay is set to JDELAY_OVERRIDDEN */
5857static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
5858 size_t count)
5859{
5860 int ndelay, res;
5861
5862 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
5863 (ndelay >= 0) && (ndelay < (1000 * 1000 * 1000))) {
5864 res = count;
5865 if (sdebug_ndelay != ndelay) {
5866 int j, k;
5867 struct sdebug_queue *sqp;
5868
5869 block_unblock_all_queues(true);
5870 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
5871 ++j, ++sqp) {
5872 k = find_first_bit(sqp->in_use_bm,
5873 sdebug_max_queue);
5874 if (k != sdebug_max_queue) {
5875 res = -EBUSY; /* queued commands */
5876 break;
5877 }
5878 }
5879 if (res > 0) {
5880 sdebug_ndelay = ndelay;
5881 sdebug_jdelay = ndelay ? JDELAY_OVERRIDDEN
5882 : DEF_JDELAY;
5883 }
5884 block_unblock_all_queues(false);
5885 }
5886 return res;
5887 }
5888 return -EINVAL;
5889}
5890static DRIVER_ATTR_RW(ndelay);
5891
5892static ssize_t opts_show(struct device_driver *ddp, char *buf)
5893{
5894 return scnprintf(buf, PAGE_SIZE, "0x%x\n", sdebug_opts);
5895}
5896
5897static ssize_t opts_store(struct device_driver *ddp, const char *buf,
5898 size_t count)
5899{
5900 int opts;
5901 char work[20];
5902
5903 if (sscanf(buf, "%10s", work) == 1) {
5904 if (strncasecmp(work, "0x", 2) == 0) {
5905 if (kstrtoint(work + 2, 16, &opts) == 0)
5906 goto opts_done;
5907 } else {
5908 if (kstrtoint(work, 10, &opts) == 0)
5909 goto opts_done;
5910 }
5911 }
5912 return -EINVAL;
5913opts_done:
5914 sdebug_opts = opts;
5915 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
5916 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
5917 tweak_cmnd_count();
5918 return count;
5919}
5920static DRIVER_ATTR_RW(opts);
5921
5922static ssize_t ptype_show(struct device_driver *ddp, char *buf)
5923{
5924 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ptype);
5925}
5926static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
5927 size_t count)
5928{
5929 int n;
5930
5931 /* Cannot change from or to TYPE_ZBC with sysfs */
5932 if (sdebug_ptype == TYPE_ZBC)
5933 return -EINVAL;
5934
5935 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
5936 if (n == TYPE_ZBC)
5937 return -EINVAL;
5938 sdebug_ptype = n;
5939 return count;
5940 }
5941 return -EINVAL;
5942}
5943static DRIVER_ATTR_RW(ptype);
5944
5945static ssize_t dsense_show(struct device_driver *ddp, char *buf)
5946{
5947 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dsense);
5948}
5949static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
5950 size_t count)
5951{
5952 int n;
5953
5954 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
5955 sdebug_dsense = n;
5956 return count;
5957 }
5958 return -EINVAL;
5959}
5960static DRIVER_ATTR_RW(dsense);
5961
5962static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
5963{
5964 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_fake_rw);
5965}
5966static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
5967 size_t count)
5968{
5969 int n, idx;
5970
5971 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
5972 bool want_store = (n == 0);
5973 struct sdebug_host_info *sdhp;
5974
5975 n = (n > 0);
5976 sdebug_fake_rw = (sdebug_fake_rw > 0);
5977 if (sdebug_fake_rw == n)
5978 return count; /* not transitioning so do nothing */
5979
5980 if (want_store) { /* 1 --> 0 transition, set up store */
5981 if (sdeb_first_idx < 0) {
5982 idx = sdebug_add_store();
5983 if (idx < 0)
5984 return idx;
5985 } else {
5986 idx = sdeb_first_idx;
5987 xa_clear_mark(per_store_ap, idx,
5988 SDEB_XA_NOT_IN_USE);
5989 }
5990 /* make all hosts use same store */
5991 list_for_each_entry(sdhp, &sdebug_host_list,
5992 host_list) {
5993 if (sdhp->si_idx != idx) {
5994 xa_set_mark(per_store_ap, sdhp->si_idx,
5995 SDEB_XA_NOT_IN_USE);
5996 sdhp->si_idx = idx;
5997 }
5998 }
5999 sdeb_most_recent_idx = idx;
6000 } else { /* 0 --> 1 transition is trigger for shrink */
6001 sdebug_erase_all_stores(true /* apart from first */);
6002 }
6003 sdebug_fake_rw = n;
6004 return count;
6005 }
6006 return -EINVAL;
6007}
6008static DRIVER_ATTR_RW(fake_rw);
6009
6010static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
6011{
6012 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_lun_0);
6013}
6014static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
6015 size_t count)
6016{
6017 int n;
6018
6019 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6020 sdebug_no_lun_0 = n;
6021 return count;
6022 }
6023 return -EINVAL;
6024}
6025static DRIVER_ATTR_RW(no_lun_0);
6026
6027static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
6028{
6029 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_tgts);
6030}
6031static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
6032 size_t count)
6033{
6034 int n;
6035
6036 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6037 sdebug_num_tgts = n;
6038 sdebug_max_tgts_luns();
6039 return count;
6040 }
6041 return -EINVAL;
6042}
6043static DRIVER_ATTR_RW(num_tgts);
6044
6045static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
6046{
6047 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dev_size_mb);
6048}
6049static DRIVER_ATTR_RO(dev_size_mb);
6050
6051static ssize_t per_host_store_show(struct device_driver *ddp, char *buf)
6052{
6053 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_per_host_store);
6054}
6055
6056static ssize_t per_host_store_store(struct device_driver *ddp, const char *buf,
6057 size_t count)
6058{
6059 bool v;
6060
6061 if (kstrtobool(buf, &v))
6062 return -EINVAL;
6063
6064 sdebug_per_host_store = v;
6065 return count;
6066}
6067static DRIVER_ATTR_RW(per_host_store);
6068
6069static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
6070{
6071 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_parts);
6072}
6073static DRIVER_ATTR_RO(num_parts);
6074
6075static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
6076{
6077 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_every_nth);
6078}
6079static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
6080 size_t count)
6081{
6082 int nth;
6083 char work[20];
6084
6085 if (sscanf(buf, "%10s", work) == 1) {
6086 if (strncasecmp(work, "0x", 2) == 0) {
6087 if (kstrtoint(work + 2, 16, &nth) == 0)
6088 goto every_nth_done;
6089 } else {
6090 if (kstrtoint(work, 10, &nth) == 0)
6091 goto every_nth_done;
6092 }
6093 }
6094 return -EINVAL;
6095
6096every_nth_done:
6097 sdebug_every_nth = nth;
6098 if (nth && !sdebug_statistics) {
6099 pr_info("every_nth needs statistics=1, set it\n");
6100 sdebug_statistics = true;
6101 }
6102 tweak_cmnd_count();
6103 return count;
6104}
6105static DRIVER_ATTR_RW(every_nth);
6106
6107static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
6108{
6109 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_luns);
6110}
6111static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
6112 size_t count)
6113{
6114 int n;
6115 bool changed;
6116
6117 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6118 if (n > 256) {
6119 pr_warn("max_luns can be no more than 256\n");
6120 return -EINVAL;
6121 }
6122 changed = (sdebug_max_luns != n);
6123 sdebug_max_luns = n;
6124 sdebug_max_tgts_luns();
6125 if (changed && (sdebug_scsi_level >= 5)) { /* >= SPC-3 */
6126 struct sdebug_host_info *sdhp;
6127 struct sdebug_dev_info *dp;
6128
6129 spin_lock(&sdebug_host_list_lock);
6130 list_for_each_entry(sdhp, &sdebug_host_list,
6131 host_list) {
6132 list_for_each_entry(dp, &sdhp->dev_info_list,
6133 dev_list) {
6134 set_bit(SDEBUG_UA_LUNS_CHANGED,
6135 dp->uas_bm);
6136 }
6137 }
6138 spin_unlock(&sdebug_host_list_lock);
6139 }
6140 return count;
6141 }
6142 return -EINVAL;
6143}
6144static DRIVER_ATTR_RW(max_luns);
6145
6146static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
6147{
6148 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_queue);
6149}
6150/* N.B. max_queue can be changed while there are queued commands. In flight
6151 * commands beyond the new max_queue will be completed. */
6152static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
6153 size_t count)
6154{
6155 int j, n, k, a;
6156 struct sdebug_queue *sqp;
6157
6158 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
6159 (n <= SDEBUG_CANQUEUE) &&
6160 (sdebug_host_max_queue == 0)) {
6161 block_unblock_all_queues(true);
6162 k = 0;
6163 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
6164 ++j, ++sqp) {
6165 a = find_last_bit(sqp->in_use_bm, SDEBUG_CANQUEUE);
6166 if (a > k)
6167 k = a;
6168 }
6169 sdebug_max_queue = n;
6170 if (k == SDEBUG_CANQUEUE)
6171 atomic_set(&retired_max_queue, 0);
6172 else if (k >= n)
6173 atomic_set(&retired_max_queue, k + 1);
6174 else
6175 atomic_set(&retired_max_queue, 0);
6176 block_unblock_all_queues(false);
6177 return count;
6178 }
6179 return -EINVAL;
6180}
6181static DRIVER_ATTR_RW(max_queue);
6182
6183static ssize_t host_max_queue_show(struct device_driver *ddp, char *buf)
6184{
6185 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_host_max_queue);
6186}
6187
6188/*
6189 * Since this is used for .can_queue, and we get the hc_idx tag from the bitmap
6190 * in range [0, sdebug_host_max_queue), we can't change it.
6191 */
6192static DRIVER_ATTR_RO(host_max_queue);
6193
6194static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
6195{
6196 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_uld);
6197}
6198static DRIVER_ATTR_RO(no_uld);
6199
6200static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
6201{
6202 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_scsi_level);
6203}
6204static DRIVER_ATTR_RO(scsi_level);
6205
6206static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
6207{
6208 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_virtual_gb);
6209}
6210static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
6211 size_t count)
6212{
6213 int n;
6214 bool changed;
6215
6216 /* Ignore capacity change for ZBC drives for now */
6217 if (sdeb_zbc_in_use)
6218 return -ENOTSUPP;
6219
6220 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6221 changed = (sdebug_virtual_gb != n);
6222 sdebug_virtual_gb = n;
6223 sdebug_capacity = get_sdebug_capacity();
6224 if (changed) {
6225 struct sdebug_host_info *sdhp;
6226 struct sdebug_dev_info *dp;
6227
6228 spin_lock(&sdebug_host_list_lock);
6229 list_for_each_entry(sdhp, &sdebug_host_list,
6230 host_list) {
6231 list_for_each_entry(dp, &sdhp->dev_info_list,
6232 dev_list) {
6233 set_bit(SDEBUG_UA_CAPACITY_CHANGED,
6234 dp->uas_bm);
6235 }
6236 }
6237 spin_unlock(&sdebug_host_list_lock);
6238 }
6239 return count;
6240 }
6241 return -EINVAL;
6242}
6243static DRIVER_ATTR_RW(virtual_gb);
6244
6245static ssize_t add_host_show(struct device_driver *ddp, char *buf)
6246{
6247 /* absolute number of hosts currently active is what is shown */
6248 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_hosts);
6249}
6250
6251static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
6252 size_t count)
6253{
6254 bool found;
6255 unsigned long idx;
6256 struct sdeb_store_info *sip;
6257 bool want_phs = (sdebug_fake_rw == 0) && sdebug_per_host_store;
6258 int delta_hosts;
6259
6260 if (sscanf(buf, "%d", &delta_hosts) != 1)
6261 return -EINVAL;
6262 if (delta_hosts > 0) {
6263 do {
6264 found = false;
6265 if (want_phs) {
6266 xa_for_each_marked(per_store_ap, idx, sip,
6267 SDEB_XA_NOT_IN_USE) {
6268 sdeb_most_recent_idx = (int)idx;
6269 found = true;
6270 break;
6271 }
6272 if (found) /* re-use case */
6273 sdebug_add_host_helper((int)idx);
6274 else
6275 sdebug_do_add_host(true);
6276 } else {
6277 sdebug_do_add_host(false);
6278 }
6279 } while (--delta_hosts);
6280 } else if (delta_hosts < 0) {
6281 do {
6282 sdebug_do_remove_host(false);
6283 } while (++delta_hosts);
6284 }
6285 return count;
6286}
6287static DRIVER_ATTR_RW(add_host);
6288
6289static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
6290{
6291 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_vpd_use_hostno);
6292}
6293static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
6294 size_t count)
6295{
6296 int n;
6297
6298 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6299 sdebug_vpd_use_hostno = n;
6300 return count;
6301 }
6302 return -EINVAL;
6303}
6304static DRIVER_ATTR_RW(vpd_use_hostno);
6305
6306static ssize_t statistics_show(struct device_driver *ddp, char *buf)
6307{
6308 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_statistics);
6309}
6310static ssize_t statistics_store(struct device_driver *ddp, const char *buf,
6311 size_t count)
6312{
6313 int n;
6314
6315 if ((count > 0) && (sscanf(buf, "%d", &n) == 1) && (n >= 0)) {
6316 if (n > 0)
6317 sdebug_statistics = true;
6318 else {
6319 clear_queue_stats();
6320 sdebug_statistics = false;
6321 }
6322 return count;
6323 }
6324 return -EINVAL;
6325}
6326static DRIVER_ATTR_RW(statistics);
6327
6328static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
6329{
6330 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_sector_size);
6331}
6332static DRIVER_ATTR_RO(sector_size);
6333
6334static ssize_t submit_queues_show(struct device_driver *ddp, char *buf)
6335{
6336 return scnprintf(buf, PAGE_SIZE, "%d\n", submit_queues);
6337}
6338static DRIVER_ATTR_RO(submit_queues);
6339
6340static ssize_t dix_show(struct device_driver *ddp, char *buf)
6341{
6342 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dix);
6343}
6344static DRIVER_ATTR_RO(dix);
6345
6346static ssize_t dif_show(struct device_driver *ddp, char *buf)
6347{
6348 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dif);
6349}
6350static DRIVER_ATTR_RO(dif);
6351
6352static ssize_t guard_show(struct device_driver *ddp, char *buf)
6353{
6354 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_guard);
6355}
6356static DRIVER_ATTR_RO(guard);
6357
6358static ssize_t ato_show(struct device_driver *ddp, char *buf)
6359{
6360 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ato);
6361}
6362static DRIVER_ATTR_RO(ato);
6363
6364static ssize_t map_show(struct device_driver *ddp, char *buf)
6365{
6366 ssize_t count = 0;
6367
6368 if (!scsi_debug_lbp())
6369 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
6370 sdebug_store_sectors);
6371
6372 if (sdebug_fake_rw == 0 && !xa_empty(per_store_ap)) {
6373 struct sdeb_store_info *sip = xa_load(per_store_ap, 0);
6374
6375 if (sip)
6376 count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
6377 (int)map_size, sip->map_storep);
6378 }
6379 buf[count++] = '\n';
6380 buf[count] = '\0';
6381
6382 return count;
6383}
6384static DRIVER_ATTR_RO(map);
6385
6386static ssize_t random_show(struct device_driver *ddp, char *buf)
6387{
6388 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_random);
6389}
6390
6391static ssize_t random_store(struct device_driver *ddp, const char *buf,
6392 size_t count)
6393{
6394 bool v;
6395
6396 if (kstrtobool(buf, &v))
6397 return -EINVAL;
6398
6399 sdebug_random = v;
6400 return count;
6401}
6402static DRIVER_ATTR_RW(random);
6403
6404static ssize_t removable_show(struct device_driver *ddp, char *buf)
6405{
6406 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_removable ? 1 : 0);
6407}
6408static ssize_t removable_store(struct device_driver *ddp, const char *buf,
6409 size_t count)
6410{
6411 int n;
6412
6413 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6414 sdebug_removable = (n > 0);
6415 return count;
6416 }
6417 return -EINVAL;
6418}
6419static DRIVER_ATTR_RW(removable);
6420
6421static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
6422{
6423 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_host_lock);
6424}
6425/* N.B. sdebug_host_lock does nothing, kept for backward compatibility */
6426static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
6427 size_t count)
6428{
6429 int n;
6430
6431 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6432 sdebug_host_lock = (n > 0);
6433 return count;
6434 }
6435 return -EINVAL;
6436}
6437static DRIVER_ATTR_RW(host_lock);
6438
6439static ssize_t strict_show(struct device_driver *ddp, char *buf)
6440{
6441 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_strict);
6442}
6443static ssize_t strict_store(struct device_driver *ddp, const char *buf,
6444 size_t count)
6445{
6446 int n;
6447
6448 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6449 sdebug_strict = (n > 0);
6450 return count;
6451 }
6452 return -EINVAL;
6453}
6454static DRIVER_ATTR_RW(strict);
6455
6456static ssize_t uuid_ctl_show(struct device_driver *ddp, char *buf)
6457{
6458 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_uuid_ctl);
6459}
6460static DRIVER_ATTR_RO(uuid_ctl);
6461
6462static ssize_t cdb_len_show(struct device_driver *ddp, char *buf)
6463{
6464 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_cdb_len);
6465}
6466static ssize_t cdb_len_store(struct device_driver *ddp, const char *buf,
6467 size_t count)
6468{
6469 int ret, n;
6470
6471 ret = kstrtoint(buf, 0, &n);
6472 if (ret)
6473 return ret;
6474 sdebug_cdb_len = n;
6475 all_config_cdb_len();
6476 return count;
6477}
6478static DRIVER_ATTR_RW(cdb_len);
6479
6480static const char * const zbc_model_strs_a[] = {
6481 [BLK_ZONED_NONE] = "none",
6482 [BLK_ZONED_HA] = "host-aware",
6483 [BLK_ZONED_HM] = "host-managed",
6484};
6485
6486static const char * const zbc_model_strs_b[] = {
6487 [BLK_ZONED_NONE] = "no",
6488 [BLK_ZONED_HA] = "aware",
6489 [BLK_ZONED_HM] = "managed",
6490};
6491
6492static const char * const zbc_model_strs_c[] = {
6493 [BLK_ZONED_NONE] = "0",
6494 [BLK_ZONED_HA] = "1",
6495 [BLK_ZONED_HM] = "2",
6496};
6497
6498static int sdeb_zbc_model_str(const char *cp)
6499{
6500 int res = sysfs_match_string(zbc_model_strs_a, cp);
6501
6502 if (res < 0) {
6503 res = sysfs_match_string(zbc_model_strs_b, cp);
6504 if (res < 0) {
6505 res = sysfs_match_string(zbc_model_strs_c, cp);
6506 if (res < 0)
6507 return -EINVAL;
6508 }
6509 }
6510 return res;
6511}
6512
6513static ssize_t zbc_show(struct device_driver *ddp, char *buf)
6514{
6515 return scnprintf(buf, PAGE_SIZE, "%s\n",
6516 zbc_model_strs_a[sdeb_zbc_model]);
6517}
6518static DRIVER_ATTR_RO(zbc);
6519
6520static ssize_t tur_ms_to_ready_show(struct device_driver *ddp, char *buf)
6521{
6522 return scnprintf(buf, PAGE_SIZE, "%d\n", sdeb_tur_ms_to_ready);
6523}
6524static DRIVER_ATTR_RO(tur_ms_to_ready);
6525
6526/* Note: The following array creates attribute files in the
6527 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
6528 files (over those found in the /sys/module/scsi_debug/parameters
6529 directory) is that auxiliary actions can be triggered when an attribute
6530 is changed. For example see: add_host_store() above.
6531 */
6532
6533static struct attribute *sdebug_drv_attrs[] = {
6534 &driver_attr_delay.attr,
6535 &driver_attr_opts.attr,
6536 &driver_attr_ptype.attr,
6537 &driver_attr_dsense.attr,
6538 &driver_attr_fake_rw.attr,
6539 &driver_attr_host_max_queue.attr,
6540 &driver_attr_no_lun_0.attr,
6541 &driver_attr_num_tgts.attr,
6542 &driver_attr_dev_size_mb.attr,
6543 &driver_attr_num_parts.attr,
6544 &driver_attr_every_nth.attr,
6545 &driver_attr_max_luns.attr,
6546 &driver_attr_max_queue.attr,
6547 &driver_attr_no_uld.attr,
6548 &driver_attr_scsi_level.attr,
6549 &driver_attr_virtual_gb.attr,
6550 &driver_attr_add_host.attr,
6551 &driver_attr_per_host_store.attr,
6552 &driver_attr_vpd_use_hostno.attr,
6553 &driver_attr_sector_size.attr,
6554 &driver_attr_statistics.attr,
6555 &driver_attr_submit_queues.attr,
6556 &driver_attr_dix.attr,
6557 &driver_attr_dif.attr,
6558 &driver_attr_guard.attr,
6559 &driver_attr_ato.attr,
6560 &driver_attr_map.attr,
6561 &driver_attr_random.attr,
6562 &driver_attr_removable.attr,
6563 &driver_attr_host_lock.attr,
6564 &driver_attr_ndelay.attr,
6565 &driver_attr_strict.attr,
6566 &driver_attr_uuid_ctl.attr,
6567 &driver_attr_cdb_len.attr,
6568 &driver_attr_tur_ms_to_ready.attr,
6569 &driver_attr_zbc.attr,
6570 NULL,
6571};
6572ATTRIBUTE_GROUPS(sdebug_drv);
6573
6574static struct device *pseudo_primary;
6575
6576static int __init scsi_debug_init(void)
6577{
6578 bool want_store = (sdebug_fake_rw == 0);
6579 unsigned long sz;
6580 int k, ret, hosts_to_add;
6581 int idx = -1;
6582
6583 ramdisk_lck_a[0] = &atomic_rw;
6584 ramdisk_lck_a[1] = &atomic_rw2;
6585 atomic_set(&retired_max_queue, 0);
6586
6587 if (sdebug_ndelay >= 1000 * 1000 * 1000) {
6588 pr_warn("ndelay must be less than 1 second, ignored\n");
6589 sdebug_ndelay = 0;
6590 } else if (sdebug_ndelay > 0)
6591 sdebug_jdelay = JDELAY_OVERRIDDEN;
6592
6593 switch (sdebug_sector_size) {
6594 case 512:
6595 case 1024:
6596 case 2048:
6597 case 4096:
6598 break;
6599 default:
6600 pr_err("invalid sector_size %d\n", sdebug_sector_size);
6601 return -EINVAL;
6602 }
6603
6604 switch (sdebug_dif) {
6605 case T10_PI_TYPE0_PROTECTION:
6606 break;
6607 case T10_PI_TYPE1_PROTECTION:
6608 case T10_PI_TYPE2_PROTECTION:
6609 case T10_PI_TYPE3_PROTECTION:
6610 have_dif_prot = true;
6611 break;
6612
6613 default:
6614 pr_err("dif must be 0, 1, 2 or 3\n");
6615 return -EINVAL;
6616 }
6617
6618 if (sdebug_num_tgts < 0) {
6619 pr_err("num_tgts must be >= 0\n");
6620 return -EINVAL;
6621 }
6622
6623 if (sdebug_guard > 1) {
6624 pr_err("guard must be 0 or 1\n");
6625 return -EINVAL;
6626 }
6627
6628 if (sdebug_ato > 1) {
6629 pr_err("ato must be 0 or 1\n");
6630 return -EINVAL;
6631 }
6632
6633 if (sdebug_physblk_exp > 15) {
6634 pr_err("invalid physblk_exp %u\n", sdebug_physblk_exp);
6635 return -EINVAL;
6636 }
6637 if (sdebug_max_luns > 256) {
6638 pr_warn("max_luns can be no more than 256, use default\n");
6639 sdebug_max_luns = DEF_MAX_LUNS;
6640 }
6641
6642 if (sdebug_lowest_aligned > 0x3fff) {
6643 pr_err("lowest_aligned too big: %u\n", sdebug_lowest_aligned);
6644 return -EINVAL;
6645 }
6646
6647 if (submit_queues < 1) {
6648 pr_err("submit_queues must be 1 or more\n");
6649 return -EINVAL;
6650 }
6651
6652 if ((sdebug_max_queue > SDEBUG_CANQUEUE) || (sdebug_max_queue < 1)) {
6653 pr_err("max_queue must be in range [1, %d]\n", SDEBUG_CANQUEUE);
6654 return -EINVAL;
6655 }
6656
6657 if ((sdebug_host_max_queue > SDEBUG_CANQUEUE) ||
6658 (sdebug_host_max_queue < 0)) {
6659 pr_err("host_max_queue must be in range [0 %d]\n",
6660 SDEBUG_CANQUEUE);
6661 return -EINVAL;
6662 }
6663
6664 if (sdebug_host_max_queue &&
6665 (sdebug_max_queue != sdebug_host_max_queue)) {
6666 sdebug_max_queue = sdebug_host_max_queue;
6667 pr_warn("fixing max submit queue depth to host max queue depth, %d\n",
6668 sdebug_max_queue);
6669 }
6670
6671 sdebug_q_arr = kcalloc(submit_queues, sizeof(struct sdebug_queue),
6672 GFP_KERNEL);
6673 if (sdebug_q_arr == NULL)
6674 return -ENOMEM;
6675 for (k = 0; k < submit_queues; ++k)
6676 spin_lock_init(&sdebug_q_arr[k].qc_lock);
6677
6678 /*
6679 * check for host managed zoned block device specified with
6680 * ptype=0x14 or zbc=XXX.
6681 */
6682 if (sdebug_ptype == TYPE_ZBC) {
6683 sdeb_zbc_model = BLK_ZONED_HM;
6684 } else if (sdeb_zbc_model_s && *sdeb_zbc_model_s) {
6685 k = sdeb_zbc_model_str(sdeb_zbc_model_s);
6686 if (k < 0) {
6687 ret = k;
6688 goto free_vm;
6689 }
6690 sdeb_zbc_model = k;
6691 switch (sdeb_zbc_model) {
6692 case BLK_ZONED_NONE:
6693 case BLK_ZONED_HA:
6694 sdebug_ptype = TYPE_DISK;
6695 break;
6696 case BLK_ZONED_HM:
6697 sdebug_ptype = TYPE_ZBC;
6698 break;
6699 default:
6700 pr_err("Invalid ZBC model\n");
6701 return -EINVAL;
6702 }
6703 }
6704 if (sdeb_zbc_model != BLK_ZONED_NONE) {
6705 sdeb_zbc_in_use = true;
6706 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT)
6707 sdebug_dev_size_mb = DEF_ZBC_DEV_SIZE_MB;
6708 }
6709
6710 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT)
6711 sdebug_dev_size_mb = DEF_DEV_SIZE_MB;
6712 if (sdebug_dev_size_mb < 1)
6713 sdebug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
6714 sz = (unsigned long)sdebug_dev_size_mb * 1048576;
6715 sdebug_store_sectors = sz / sdebug_sector_size;
6716 sdebug_capacity = get_sdebug_capacity();
6717
6718 /* play around with geometry, don't waste too much on track 0 */
6719 sdebug_heads = 8;
6720 sdebug_sectors_per = 32;
6721 if (sdebug_dev_size_mb >= 256)
6722 sdebug_heads = 64;
6723 else if (sdebug_dev_size_mb >= 16)
6724 sdebug_heads = 32;
6725 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
6726 (sdebug_sectors_per * sdebug_heads);
6727 if (sdebug_cylinders_per >= 1024) {
6728 /* other LLDs do this; implies >= 1GB ram disk ... */
6729 sdebug_heads = 255;
6730 sdebug_sectors_per = 63;
6731 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
6732 (sdebug_sectors_per * sdebug_heads);
6733 }
6734 if (scsi_debug_lbp()) {
6735 sdebug_unmap_max_blocks =
6736 clamp(sdebug_unmap_max_blocks, 0U, 0xffffffffU);
6737
6738 sdebug_unmap_max_desc =
6739 clamp(sdebug_unmap_max_desc, 0U, 256U);
6740
6741 sdebug_unmap_granularity =
6742 clamp(sdebug_unmap_granularity, 1U, 0xffffffffU);
6743
6744 if (sdebug_unmap_alignment &&
6745 sdebug_unmap_granularity <=
6746 sdebug_unmap_alignment) {
6747 pr_err("ERR: unmap_granularity <= unmap_alignment\n");
6748 ret = -EINVAL;
6749 goto free_q_arr;
6750 }
6751 }
6752 xa_init_flags(per_store_ap, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ);
6753 if (want_store) {
6754 idx = sdebug_add_store();
6755 if (idx < 0) {
6756 ret = idx;
6757 goto free_q_arr;
6758 }
6759 }
6760
6761 pseudo_primary = root_device_register("pseudo_0");
6762 if (IS_ERR(pseudo_primary)) {
6763 pr_warn("root_device_register() error\n");
6764 ret = PTR_ERR(pseudo_primary);
6765 goto free_vm;
6766 }
6767 ret = bus_register(&pseudo_lld_bus);
6768 if (ret < 0) {
6769 pr_warn("bus_register error: %d\n", ret);
6770 goto dev_unreg;
6771 }
6772 ret = driver_register(&sdebug_driverfs_driver);
6773 if (ret < 0) {
6774 pr_warn("driver_register error: %d\n", ret);
6775 goto bus_unreg;
6776 }
6777
6778 hosts_to_add = sdebug_add_host;
6779 sdebug_add_host = 0;
6780
6781 for (k = 0; k < hosts_to_add; k++) {
6782 if (want_store && k == 0) {
6783 ret = sdebug_add_host_helper(idx);
6784 if (ret < 0) {
6785 pr_err("add_host_helper k=%d, error=%d\n",
6786 k, -ret);
6787 break;
6788 }
6789 } else {
6790 ret = sdebug_do_add_host(want_store &&
6791 sdebug_per_host_store);
6792 if (ret < 0) {
6793 pr_err("add_host k=%d error=%d\n", k, -ret);
6794 break;
6795 }
6796 }
6797 }
6798 if (sdebug_verbose)
6799 pr_info("built %d host(s)\n", sdebug_num_hosts);
6800
6801 return 0;
6802
6803bus_unreg:
6804 bus_unregister(&pseudo_lld_bus);
6805dev_unreg:
6806 root_device_unregister(pseudo_primary);
6807free_vm:
6808 sdebug_erase_store(idx, NULL);
6809free_q_arr:
6810 kfree(sdebug_q_arr);
6811 return ret;
6812}
6813
6814static void __exit scsi_debug_exit(void)
6815{
6816 int k = sdebug_num_hosts;
6817
6818 stop_all_queued();
6819 for (; k; k--)
6820 sdebug_do_remove_host(true);
6821 free_all_queued();
6822 driver_unregister(&sdebug_driverfs_driver);
6823 bus_unregister(&pseudo_lld_bus);
6824 root_device_unregister(pseudo_primary);
6825
6826 sdebug_erase_all_stores(false);
6827 xa_destroy(per_store_ap);
6828}
6829
6830device_initcall(scsi_debug_init);
6831module_exit(scsi_debug_exit);
6832
6833static void sdebug_release_adapter(struct device *dev)
6834{
6835 struct sdebug_host_info *sdbg_host;
6836
6837 sdbg_host = to_sdebug_host(dev);
6838 kfree(sdbg_host);
6839}
6840
6841/* idx must be valid, if sip is NULL then it will be obtained using idx */
6842static void sdebug_erase_store(int idx, struct sdeb_store_info *sip)
6843{
6844 if (idx < 0)
6845 return;
6846 if (!sip) {
6847 if (xa_empty(per_store_ap))
6848 return;
6849 sip = xa_load(per_store_ap, idx);
6850 if (!sip)
6851 return;
6852 }
6853 vfree(sip->map_storep);
6854 vfree(sip->dif_storep);
6855 vfree(sip->storep);
6856 xa_erase(per_store_ap, idx);
6857 kfree(sip);
6858}
6859
6860/* Assume apart_from_first==false only in shutdown case. */
6861static void sdebug_erase_all_stores(bool apart_from_first)
6862{
6863 unsigned long idx;
6864 struct sdeb_store_info *sip = NULL;
6865
6866 xa_for_each(per_store_ap, idx, sip) {
6867 if (apart_from_first)
6868 apart_from_first = false;
6869 else
6870 sdebug_erase_store(idx, sip);
6871 }
6872 if (apart_from_first)
6873 sdeb_most_recent_idx = sdeb_first_idx;
6874}
6875
6876/*
6877 * Returns store xarray new element index (idx) if >=0 else negated errno.
6878 * Limit the number of stores to 65536.
6879 */
6880static int sdebug_add_store(void)
6881{
6882 int res;
6883 u32 n_idx;
6884 unsigned long iflags;
6885 unsigned long sz = (unsigned long)sdebug_dev_size_mb * 1048576;
6886 struct sdeb_store_info *sip = NULL;
6887 struct xa_limit xal = { .max = 1 << 16, .min = 0 };
6888
6889 sip = kzalloc(sizeof(*sip), GFP_KERNEL);
6890 if (!sip)
6891 return -ENOMEM;
6892
6893 xa_lock_irqsave(per_store_ap, iflags);
6894 res = __xa_alloc(per_store_ap, &n_idx, sip, xal, GFP_ATOMIC);
6895 if (unlikely(res < 0)) {
6896 xa_unlock_irqrestore(per_store_ap, iflags);
6897 kfree(sip);
6898 pr_warn("%s: xa_alloc() errno=%d\n", __func__, -res);
6899 return res;
6900 }
6901 sdeb_most_recent_idx = n_idx;
6902 if (sdeb_first_idx < 0)
6903 sdeb_first_idx = n_idx;
6904 xa_unlock_irqrestore(per_store_ap, iflags);
6905
6906 res = -ENOMEM;
6907 sip->storep = vzalloc(sz);
6908 if (!sip->storep) {
6909 pr_err("user data oom\n");
6910 goto err;
6911 }
6912 if (sdebug_num_parts > 0)
6913 sdebug_build_parts(sip->storep, sz);
6914
6915 /* DIF/DIX: what T10 calls Protection Information (PI) */
6916 if (sdebug_dix) {
6917 int dif_size;
6918
6919 dif_size = sdebug_store_sectors * sizeof(struct t10_pi_tuple);
6920 sip->dif_storep = vmalloc(dif_size);
6921
6922 pr_info("dif_storep %u bytes @ %pK\n", dif_size,
6923 sip->dif_storep);
6924
6925 if (!sip->dif_storep) {
6926 pr_err("DIX oom\n");
6927 goto err;
6928 }
6929 memset(sip->dif_storep, 0xff, dif_size);
6930 }
6931 /* Logical Block Provisioning */
6932 if (scsi_debug_lbp()) {
6933 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
6934 sip->map_storep = vmalloc(array_size(sizeof(long),
6935 BITS_TO_LONGS(map_size)));
6936
6937 pr_info("%lu provisioning blocks\n", map_size);
6938
6939 if (!sip->map_storep) {
6940 pr_err("LBP map oom\n");
6941 goto err;
6942 }
6943
6944 bitmap_zero(sip->map_storep, map_size);
6945
6946 /* Map first 1KB for partition table */
6947 if (sdebug_num_parts)
6948 map_region(sip, 0, 2);
6949 }
6950
6951 rwlock_init(&sip->macc_lck);
6952 return (int)n_idx;
6953err:
6954 sdebug_erase_store((int)n_idx, sip);
6955 pr_warn("%s: failed, errno=%d\n", __func__, -res);
6956 return res;
6957}
6958
6959static int sdebug_add_host_helper(int per_host_idx)
6960{
6961 int k, devs_per_host, idx;
6962 int error = -ENOMEM;
6963 struct sdebug_host_info *sdbg_host;
6964 struct sdebug_dev_info *sdbg_devinfo, *tmp;
6965
6966 sdbg_host = kzalloc(sizeof(*sdbg_host), GFP_KERNEL);
6967 if (!sdbg_host)
6968 return -ENOMEM;
6969 idx = (per_host_idx < 0) ? sdeb_first_idx : per_host_idx;
6970 if (xa_get_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE))
6971 xa_clear_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE);
6972 sdbg_host->si_idx = idx;
6973
6974 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
6975
6976 devs_per_host = sdebug_num_tgts * sdebug_max_luns;
6977 for (k = 0; k < devs_per_host; k++) {
6978 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
6979 if (!sdbg_devinfo)
6980 goto clean;
6981 }
6982
6983 spin_lock(&sdebug_host_list_lock);
6984 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
6985 spin_unlock(&sdebug_host_list_lock);
6986
6987 sdbg_host->dev.bus = &pseudo_lld_bus;
6988 sdbg_host->dev.parent = pseudo_primary;
6989 sdbg_host->dev.release = &sdebug_release_adapter;
6990 dev_set_name(&sdbg_host->dev, "adapter%d", sdebug_num_hosts);
6991
6992 error = device_register(&sdbg_host->dev);
6993 if (error)
6994 goto clean;
6995
6996 ++sdebug_num_hosts;
6997 return 0;
6998
6999clean:
7000 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
7001 dev_list) {
7002 list_del(&sdbg_devinfo->dev_list);
7003 kfree(sdbg_devinfo->zstate);
7004 kfree(sdbg_devinfo);
7005 }
7006 kfree(sdbg_host);
7007 pr_warn("%s: failed, errno=%d\n", __func__, -error);
7008 return error;
7009}
7010
7011static int sdebug_do_add_host(bool mk_new_store)
7012{
7013 int ph_idx = sdeb_most_recent_idx;
7014
7015 if (mk_new_store) {
7016 ph_idx = sdebug_add_store();
7017 if (ph_idx < 0)
7018 return ph_idx;
7019 }
7020 return sdebug_add_host_helper(ph_idx);
7021}
7022
7023static void sdebug_do_remove_host(bool the_end)
7024{
7025 int idx = -1;
7026 struct sdebug_host_info *sdbg_host = NULL;
7027 struct sdebug_host_info *sdbg_host2;
7028
7029 spin_lock(&sdebug_host_list_lock);
7030 if (!list_empty(&sdebug_host_list)) {
7031 sdbg_host = list_entry(sdebug_host_list.prev,
7032 struct sdebug_host_info, host_list);
7033 idx = sdbg_host->si_idx;
7034 }
7035 if (!the_end && idx >= 0) {
7036 bool unique = true;
7037
7038 list_for_each_entry(sdbg_host2, &sdebug_host_list, host_list) {
7039 if (sdbg_host2 == sdbg_host)
7040 continue;
7041 if (idx == sdbg_host2->si_idx) {
7042 unique = false;
7043 break;
7044 }
7045 }
7046 if (unique) {
7047 xa_set_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE);
7048 if (idx == sdeb_most_recent_idx)
7049 --sdeb_most_recent_idx;
7050 }
7051 }
7052 if (sdbg_host)
7053 list_del(&sdbg_host->host_list);
7054 spin_unlock(&sdebug_host_list_lock);
7055
7056 if (!sdbg_host)
7057 return;
7058
7059 device_unregister(&sdbg_host->dev);
7060 --sdebug_num_hosts;
7061}
7062
7063static int sdebug_change_qdepth(struct scsi_device *sdev, int qdepth)
7064{
7065 int num_in_q = 0;
7066 struct sdebug_dev_info *devip;
7067
7068 block_unblock_all_queues(true);
7069 devip = (struct sdebug_dev_info *)sdev->hostdata;
7070 if (NULL == devip) {
7071 block_unblock_all_queues(false);
7072 return -ENODEV;
7073 }
7074 num_in_q = atomic_read(&devip->num_in_q);
7075
7076 if (qdepth < 1)
7077 qdepth = 1;
7078 /* allow to exceed max host qc_arr elements for testing */
7079 if (qdepth > SDEBUG_CANQUEUE + 10)
7080 qdepth = SDEBUG_CANQUEUE + 10;
7081 scsi_change_queue_depth(sdev, qdepth);
7082
7083 if (SDEBUG_OPT_Q_NOISE & sdebug_opts) {
7084 sdev_printk(KERN_INFO, sdev, "%s: qdepth=%d, num_in_q=%d\n",
7085 __func__, qdepth, num_in_q);
7086 }
7087 block_unblock_all_queues(false);
7088 return sdev->queue_depth;
7089}
7090
7091static bool fake_timeout(struct scsi_cmnd *scp)
7092{
7093 if (0 == (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth))) {
7094 if (sdebug_every_nth < -1)
7095 sdebug_every_nth = -1;
7096 if (SDEBUG_OPT_TIMEOUT & sdebug_opts)
7097 return true; /* ignore command causing timeout */
7098 else if (SDEBUG_OPT_MAC_TIMEOUT & sdebug_opts &&
7099 scsi_medium_access_command(scp))
7100 return true; /* time out reads and writes */
7101 }
7102 return false;
7103}
7104
7105/* Response to TUR or media access command when device stopped */
7106static int resp_not_ready(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
7107{
7108 int stopped_state;
7109 u64 diff_ns = 0;
7110 ktime_t now_ts = ktime_get_boottime();
7111 struct scsi_device *sdp = scp->device;
7112
7113 stopped_state = atomic_read(&devip->stopped);
7114 if (stopped_state == 2) {
7115 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) {
7116 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts));
7117 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) {
7118 /* tur_ms_to_ready timer extinguished */
7119 atomic_set(&devip->stopped, 0);
7120 return 0;
7121 }
7122 }
7123 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x1);
7124 if (sdebug_verbose)
7125 sdev_printk(KERN_INFO, sdp,
7126 "%s: Not ready: in process of becoming ready\n", my_name);
7127 if (scp->cmnd[0] == TEST_UNIT_READY) {
7128 u64 tur_nanosecs_to_ready = (u64)sdeb_tur_ms_to_ready * 1000000;
7129
7130 if (diff_ns <= tur_nanosecs_to_ready)
7131 diff_ns = tur_nanosecs_to_ready - diff_ns;
7132 else
7133 diff_ns = tur_nanosecs_to_ready;
7134 /* As per 20-061r2 approved for spc6 by T10 on 20200716 */
7135 do_div(diff_ns, 1000000); /* diff_ns becomes milliseconds */
7136 scsi_set_sense_information(scp->sense_buffer, SCSI_SENSE_BUFFERSIZE,
7137 diff_ns);
7138 return check_condition_result;
7139 }
7140 }
7141 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2);
7142 if (sdebug_verbose)
7143 sdev_printk(KERN_INFO, sdp, "%s: Not ready: initializing command required\n",
7144 my_name);
7145 return check_condition_result;
7146}
7147
7148static int scsi_debug_queuecommand(struct Scsi_Host *shost,
7149 struct scsi_cmnd *scp)
7150{
7151 u8 sdeb_i;
7152 struct scsi_device *sdp = scp->device;
7153 const struct opcode_info_t *oip;
7154 const struct opcode_info_t *r_oip;
7155 struct sdebug_dev_info *devip;
7156 u8 *cmd = scp->cmnd;
7157 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
7158 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *) = NULL;
7159 int k, na;
7160 int errsts = 0;
7161 u32 flags;
7162 u16 sa;
7163 u8 opcode = cmd[0];
7164 bool has_wlun_rl;
7165 bool inject_now;
7166
7167 scsi_set_resid(scp, 0);
7168 if (sdebug_statistics) {
7169 atomic_inc(&sdebug_cmnd_count);
7170 inject_now = inject_on_this_cmd();
7171 } else {
7172 inject_now = false;
7173 }
7174 if (unlikely(sdebug_verbose &&
7175 !(SDEBUG_OPT_NO_CDB_NOISE & sdebug_opts))) {
7176 char b[120];
7177 int n, len, sb;
7178
7179 len = scp->cmd_len;
7180 sb = (int)sizeof(b);
7181 if (len > 32)
7182 strcpy(b, "too long, over 32 bytes");
7183 else {
7184 for (k = 0, n = 0; k < len && n < sb; ++k)
7185 n += scnprintf(b + n, sb - n, "%02x ",
7186 (u32)cmd[k]);
7187 }
7188 sdev_printk(KERN_INFO, sdp, "%s: tag=%#x, cmd %s\n", my_name,
7189 blk_mq_unique_tag(scp->request), b);
7190 }
7191 if (unlikely(inject_now && (sdebug_opts & SDEBUG_OPT_HOST_BUSY)))
7192 return SCSI_MLQUEUE_HOST_BUSY;
7193 has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS);
7194 if (unlikely((sdp->lun >= sdebug_max_luns) && !has_wlun_rl))
7195 goto err_out;
7196
7197 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */
7198 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */
7199 devip = (struct sdebug_dev_info *)sdp->hostdata;
7200 if (unlikely(!devip)) {
7201 devip = find_build_dev_info(sdp);
7202 if (NULL == devip)
7203 goto err_out;
7204 }
7205 if (unlikely(inject_now && !atomic_read(&sdeb_inject_pending)))
7206 atomic_set(&sdeb_inject_pending, 1);
7207
7208 na = oip->num_attached;
7209 r_pfp = oip->pfp;
7210 if (na) { /* multiple commands with this opcode */
7211 r_oip = oip;
7212 if (FF_SA & r_oip->flags) {
7213 if (F_SA_LOW & oip->flags)
7214 sa = 0x1f & cmd[1];
7215 else
7216 sa = get_unaligned_be16(cmd + 8);
7217 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
7218 if (opcode == oip->opcode && sa == oip->sa)
7219 break;
7220 }
7221 } else { /* since no service action only check opcode */
7222 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
7223 if (opcode == oip->opcode)
7224 break;
7225 }
7226 }
7227 if (k > na) {
7228 if (F_SA_LOW & r_oip->flags)
7229 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4);
7230 else if (F_SA_HIGH & r_oip->flags)
7231 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7);
7232 else
7233 mk_sense_invalid_opcode(scp);
7234 goto check_cond;
7235 }
7236 } /* else (when na==0) we assume the oip is a match */
7237 flags = oip->flags;
7238 if (unlikely(F_INV_OP & flags)) {
7239 mk_sense_invalid_opcode(scp);
7240 goto check_cond;
7241 }
7242 if (unlikely(has_wlun_rl && !(F_RL_WLUN_OK & flags))) {
7243 if (sdebug_verbose)
7244 sdev_printk(KERN_INFO, sdp, "%s: Opcode 0x%x not%s\n",
7245 my_name, opcode, " supported for wlun");
7246 mk_sense_invalid_opcode(scp);
7247 goto check_cond;
7248 }
7249 if (unlikely(sdebug_strict)) { /* check cdb against mask */
7250 u8 rem;
7251 int j;
7252
7253 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) {
7254 rem = ~oip->len_mask[k] & cmd[k];
7255 if (rem) {
7256 for (j = 7; j >= 0; --j, rem <<= 1) {
7257 if (0x80 & rem)
7258 break;
7259 }
7260 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j);
7261 goto check_cond;
7262 }
7263 }
7264 }
7265 if (unlikely(!(F_SKIP_UA & flags) &&
7266 find_first_bit(devip->uas_bm,
7267 SDEBUG_NUM_UAS) != SDEBUG_NUM_UAS)) {
7268 errsts = make_ua(scp, devip);
7269 if (errsts)
7270 goto check_cond;
7271 }
7272 if (unlikely(((F_M_ACCESS & flags) || scp->cmnd[0] == TEST_UNIT_READY) &&
7273 atomic_read(&devip->stopped))) {
7274 errsts = resp_not_ready(scp, devip);
7275 if (errsts)
7276 goto fini;
7277 }
7278 if (sdebug_fake_rw && (F_FAKE_RW & flags))
7279 goto fini;
7280 if (unlikely(sdebug_every_nth)) {
7281 if (fake_timeout(scp))
7282 return 0; /* ignore command: make trouble */
7283 }
7284 if (likely(oip->pfp))
7285 pfp = oip->pfp; /* calls a resp_* function */
7286 else
7287 pfp = r_pfp; /* if leaf function ptr NULL, try the root's */
7288
7289fini:
7290 if (F_DELAY_OVERR & flags) /* cmds like INQUIRY respond asap */
7291 return schedule_resp(scp, devip, errsts, pfp, 0, 0);
7292 else if ((flags & F_LONG_DELAY) && (sdebug_jdelay > 0 ||
7293 sdebug_ndelay > 10000)) {
7294 /*
7295 * Skip long delays if ndelay <= 10 microseconds. Otherwise
7296 * for Start Stop Unit (SSU) want at least 1 second delay and
7297 * if sdebug_jdelay>1 want a long delay of that many seconds.
7298 * For Synchronize Cache want 1/20 of SSU's delay.
7299 */
7300 int jdelay = (sdebug_jdelay < 2) ? 1 : sdebug_jdelay;
7301 int denom = (flags & F_SYNC_DELAY) ? 20 : 1;
7302
7303 jdelay = mult_frac(USER_HZ * jdelay, HZ, denom * USER_HZ);
7304 return schedule_resp(scp, devip, errsts, pfp, jdelay, 0);
7305 } else
7306 return schedule_resp(scp, devip, errsts, pfp, sdebug_jdelay,
7307 sdebug_ndelay);
7308check_cond:
7309 return schedule_resp(scp, devip, check_condition_result, NULL, 0, 0);
7310err_out:
7311 return schedule_resp(scp, NULL, DID_NO_CONNECT << 16, NULL, 0, 0);
7312}
7313
7314static struct scsi_host_template sdebug_driver_template = {
7315 .show_info = scsi_debug_show_info,
7316 .write_info = scsi_debug_write_info,
7317 .proc_name = sdebug_proc_name,
7318 .name = "SCSI DEBUG",
7319 .info = scsi_debug_info,
7320 .slave_alloc = scsi_debug_slave_alloc,
7321 .slave_configure = scsi_debug_slave_configure,
7322 .slave_destroy = scsi_debug_slave_destroy,
7323 .ioctl = scsi_debug_ioctl,
7324 .queuecommand = scsi_debug_queuecommand,
7325 .change_queue_depth = sdebug_change_qdepth,
7326 .eh_abort_handler = scsi_debug_abort,
7327 .eh_device_reset_handler = scsi_debug_device_reset,
7328 .eh_target_reset_handler = scsi_debug_target_reset,
7329 .eh_bus_reset_handler = scsi_debug_bus_reset,
7330 .eh_host_reset_handler = scsi_debug_host_reset,
7331 .can_queue = SDEBUG_CANQUEUE,
7332 .this_id = 7,
7333 .sg_tablesize = SG_MAX_SEGMENTS,
7334 .cmd_per_lun = DEF_CMD_PER_LUN,
7335 .max_sectors = -1U,
7336 .max_segment_size = -1U,
7337 .module = THIS_MODULE,
7338 .track_queue_depth = 1,
7339};
7340
7341static int sdebug_driver_probe(struct device *dev)
7342{
7343 int error = 0;
7344 struct sdebug_host_info *sdbg_host;
7345 struct Scsi_Host *hpnt;
7346 int hprot;
7347
7348 sdbg_host = to_sdebug_host(dev);
7349
7350 if (sdebug_host_max_queue)
7351 sdebug_driver_template.can_queue = sdebug_host_max_queue;
7352 else
7353 sdebug_driver_template.can_queue = sdebug_max_queue;
7354 if (!sdebug_clustering)
7355 sdebug_driver_template.dma_boundary = PAGE_SIZE - 1;
7356
7357 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
7358 if (NULL == hpnt) {
7359 pr_err("scsi_host_alloc failed\n");
7360 error = -ENODEV;
7361 return error;
7362 }
7363 if (submit_queues > nr_cpu_ids) {
7364 pr_warn("%s: trim submit_queues (was %d) to nr_cpu_ids=%u\n",
7365 my_name, submit_queues, nr_cpu_ids);
7366 submit_queues = nr_cpu_ids;
7367 }
7368 /*
7369 * Decide whether to tell scsi subsystem that we want mq. The
7370 * following should give the same answer for each host. If the host
7371 * has a limit of hostwide max commands, then do not set.
7372 */
7373 if (!sdebug_host_max_queue)
7374 hpnt->nr_hw_queues = submit_queues;
7375
7376 sdbg_host->shost = hpnt;
7377 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
7378 if ((hpnt->this_id >= 0) && (sdebug_num_tgts > hpnt->this_id))
7379 hpnt->max_id = sdebug_num_tgts + 1;
7380 else
7381 hpnt->max_id = sdebug_num_tgts;
7382 /* = sdebug_max_luns; */
7383 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
7384
7385 hprot = 0;
7386
7387 switch (sdebug_dif) {
7388
7389 case T10_PI_TYPE1_PROTECTION:
7390 hprot = SHOST_DIF_TYPE1_PROTECTION;
7391 if (sdebug_dix)
7392 hprot |= SHOST_DIX_TYPE1_PROTECTION;
7393 break;
7394
7395 case T10_PI_TYPE2_PROTECTION:
7396 hprot = SHOST_DIF_TYPE2_PROTECTION;
7397 if (sdebug_dix)
7398 hprot |= SHOST_DIX_TYPE2_PROTECTION;
7399 break;
7400
7401 case T10_PI_TYPE3_PROTECTION:
7402 hprot = SHOST_DIF_TYPE3_PROTECTION;
7403 if (sdebug_dix)
7404 hprot |= SHOST_DIX_TYPE3_PROTECTION;
7405 break;
7406
7407 default:
7408 if (sdebug_dix)
7409 hprot |= SHOST_DIX_TYPE0_PROTECTION;
7410 break;
7411 }
7412
7413 scsi_host_set_prot(hpnt, hprot);
7414
7415 if (have_dif_prot || sdebug_dix)
7416 pr_info("host protection%s%s%s%s%s%s%s\n",
7417 (hprot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
7418 (hprot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
7419 (hprot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
7420 (hprot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
7421 (hprot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
7422 (hprot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
7423 (hprot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
7424
7425 if (sdebug_guard == 1)
7426 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
7427 else
7428 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
7429
7430 sdebug_verbose = !!(SDEBUG_OPT_NOISE & sdebug_opts);
7431 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & sdebug_opts);
7432 if (sdebug_every_nth) /* need stats counters for every_nth */
7433 sdebug_statistics = true;
7434 error = scsi_add_host(hpnt, &sdbg_host->dev);
7435 if (error) {
7436 pr_err("scsi_add_host failed\n");
7437 error = -ENODEV;
7438 scsi_host_put(hpnt);
7439 } else {
7440 scsi_scan_host(hpnt);
7441 }
7442
7443 return error;
7444}
7445
7446static int sdebug_driver_remove(struct device *dev)
7447{
7448 struct sdebug_host_info *sdbg_host;
7449 struct sdebug_dev_info *sdbg_devinfo, *tmp;
7450
7451 sdbg_host = to_sdebug_host(dev);
7452
7453 if (!sdbg_host) {
7454 pr_err("Unable to locate host info\n");
7455 return -ENODEV;
7456 }
7457
7458 scsi_remove_host(sdbg_host->shost);
7459
7460 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
7461 dev_list) {
7462 list_del(&sdbg_devinfo->dev_list);
7463 kfree(sdbg_devinfo->zstate);
7464 kfree(sdbg_devinfo);
7465 }
7466
7467 scsi_host_put(sdbg_host->shost);
7468 return 0;
7469}
7470
7471static int pseudo_lld_bus_match(struct device *dev,
7472 struct device_driver *dev_driver)
7473{
7474 return 1;
7475}
7476
7477static struct bus_type pseudo_lld_bus = {
7478 .name = "pseudo",
7479 .match = pseudo_lld_bus_match,
7480 .probe = sdebug_driver_probe,
7481 .remove = sdebug_driver_remove,
7482 .drv_groups = sdebug_drv_groups,
7483};
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
4 * Copyright (C) 1992 Eric Youngdale
5 * Simulate a host adapter with 2 disks attached. Do a lot of checking
6 * to make sure that we are not getting blocks mixed up, and PANIC if
7 * anything out of the ordinary is seen.
8 * ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
9 *
10 * Copyright (C) 2001 - 2021 Douglas Gilbert
11 *
12 * For documentation see http://sg.danny.cz/sg/scsi_debug.html
13 */
14
15
16#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
17
18#include <linux/module.h>
19#include <linux/align.h>
20#include <linux/kernel.h>
21#include <linux/errno.h>
22#include <linux/jiffies.h>
23#include <linux/slab.h>
24#include <linux/types.h>
25#include <linux/string.h>
26#include <linux/fs.h>
27#include <linux/init.h>
28#include <linux/proc_fs.h>
29#include <linux/vmalloc.h>
30#include <linux/moduleparam.h>
31#include <linux/scatterlist.h>
32#include <linux/blkdev.h>
33#include <linux/crc-t10dif.h>
34#include <linux/spinlock.h>
35#include <linux/interrupt.h>
36#include <linux/atomic.h>
37#include <linux/hrtimer.h>
38#include <linux/uuid.h>
39#include <linux/t10-pi.h>
40#include <linux/msdos_partition.h>
41#include <linux/random.h>
42#include <linux/xarray.h>
43#include <linux/prefetch.h>
44#include <linux/debugfs.h>
45#include <linux/async.h>
46#include <linux/cleanup.h>
47
48#include <net/checksum.h>
49
50#include <asm/unaligned.h>
51
52#include <scsi/scsi.h>
53#include <scsi/scsi_cmnd.h>
54#include <scsi/scsi_device.h>
55#include <scsi/scsi_host.h>
56#include <scsi/scsicam.h>
57#include <scsi/scsi_eh.h>
58#include <scsi/scsi_tcq.h>
59#include <scsi/scsi_dbg.h>
60
61#include "sd.h"
62#include "scsi_logging.h"
63
64/* make sure inq_product_rev string corresponds to this version */
65#define SDEBUG_VERSION "0191" /* format to fit INQUIRY revision field */
66static const char *sdebug_version_date = "20210520";
67
68#define MY_NAME "scsi_debug"
69
70/* Additional Sense Code (ASC) */
71#define NO_ADDITIONAL_SENSE 0x0
72#define LOGICAL_UNIT_NOT_READY 0x4
73#define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
74#define UNRECOVERED_READ_ERR 0x11
75#define PARAMETER_LIST_LENGTH_ERR 0x1a
76#define INVALID_OPCODE 0x20
77#define LBA_OUT_OF_RANGE 0x21
78#define INVALID_FIELD_IN_CDB 0x24
79#define INVALID_FIELD_IN_PARAM_LIST 0x26
80#define WRITE_PROTECTED 0x27
81#define UA_RESET_ASC 0x29
82#define UA_CHANGED_ASC 0x2a
83#define TARGET_CHANGED_ASC 0x3f
84#define LUNS_CHANGED_ASCQ 0x0e
85#define INSUFF_RES_ASC 0x55
86#define INSUFF_RES_ASCQ 0x3
87#define POWER_ON_RESET_ASCQ 0x0
88#define POWER_ON_OCCURRED_ASCQ 0x1
89#define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */
90#define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */
91#define CAPACITY_CHANGED_ASCQ 0x9
92#define SAVING_PARAMS_UNSUP 0x39
93#define TRANSPORT_PROBLEM 0x4b
94#define THRESHOLD_EXCEEDED 0x5d
95#define LOW_POWER_COND_ON 0x5e
96#define MISCOMPARE_VERIFY_ASC 0x1d
97#define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */
98#define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16
99#define WRITE_ERROR_ASC 0xc
100#define UNALIGNED_WRITE_ASCQ 0x4
101#define WRITE_BOUNDARY_ASCQ 0x5
102#define READ_INVDATA_ASCQ 0x6
103#define READ_BOUNDARY_ASCQ 0x7
104#define ATTEMPT_ACCESS_GAP 0x9
105#define INSUFF_ZONE_ASCQ 0xe
106
107/* Additional Sense Code Qualifier (ASCQ) */
108#define ACK_NAK_TO 0x3
109
110/* Default values for driver parameters */
111#define DEF_NUM_HOST 1
112#define DEF_NUM_TGTS 1
113#define DEF_MAX_LUNS 1
114/* With these defaults, this driver will make 1 host with 1 target
115 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
116 */
117#define DEF_ATO 1
118#define DEF_CDB_LEN 10
119#define DEF_JDELAY 1 /* if > 0 unit is a jiffy */
120#define DEF_DEV_SIZE_PRE_INIT 0
121#define DEF_DEV_SIZE_MB 8
122#define DEF_ZBC_DEV_SIZE_MB 128
123#define DEF_DIF 0
124#define DEF_DIX 0
125#define DEF_PER_HOST_STORE false
126#define DEF_D_SENSE 0
127#define DEF_EVERY_NTH 0
128#define DEF_FAKE_RW 0
129#define DEF_GUARD 0
130#define DEF_HOST_LOCK 0
131#define DEF_LBPU 0
132#define DEF_LBPWS 0
133#define DEF_LBPWS10 0
134#define DEF_LBPRZ 1
135#define DEF_LOWEST_ALIGNED 0
136#define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */
137#define DEF_NO_LUN_0 0
138#define DEF_NUM_PARTS 0
139#define DEF_OPTS 0
140#define DEF_OPT_BLKS 1024
141#define DEF_PHYSBLK_EXP 0
142#define DEF_OPT_XFERLEN_EXP 0
143#define DEF_PTYPE TYPE_DISK
144#define DEF_RANDOM false
145#define DEF_REMOVABLE false
146#define DEF_SCSI_LEVEL 7 /* INQUIRY, byte2 [6->SPC-4; 7->SPC-5] */
147#define DEF_SECTOR_SIZE 512
148#define DEF_UNMAP_ALIGNMENT 0
149#define DEF_UNMAP_GRANULARITY 1
150#define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
151#define DEF_UNMAP_MAX_DESC 256
152#define DEF_VIRTUAL_GB 0
153#define DEF_VPD_USE_HOSTNO 1
154#define DEF_WRITESAME_LENGTH 0xFFFF
155#define DEF_STRICT 0
156#define DEF_STATISTICS false
157#define DEF_SUBMIT_QUEUES 1
158#define DEF_TUR_MS_TO_READY 0
159#define DEF_UUID_CTL 0
160#define JDELAY_OVERRIDDEN -9999
161
162/* Default parameters for ZBC drives */
163#define DEF_ZBC_ZONE_SIZE_MB 128
164#define DEF_ZBC_MAX_OPEN_ZONES 8
165#define DEF_ZBC_NR_CONV_ZONES 1
166
167#define SDEBUG_LUN_0_VAL 0
168
169/* bit mask values for sdebug_opts */
170#define SDEBUG_OPT_NOISE 1
171#define SDEBUG_OPT_MEDIUM_ERR 2
172#define SDEBUG_OPT_TIMEOUT 4
173#define SDEBUG_OPT_RECOVERED_ERR 8
174#define SDEBUG_OPT_TRANSPORT_ERR 16
175#define SDEBUG_OPT_DIF_ERR 32
176#define SDEBUG_OPT_DIX_ERR 64
177#define SDEBUG_OPT_MAC_TIMEOUT 128
178#define SDEBUG_OPT_SHORT_TRANSFER 0x100
179#define SDEBUG_OPT_Q_NOISE 0x200
180#define SDEBUG_OPT_ALL_TSF 0x400 /* ignore */
181#define SDEBUG_OPT_RARE_TSF 0x800
182#define SDEBUG_OPT_N_WCE 0x1000
183#define SDEBUG_OPT_RESET_NOISE 0x2000
184#define SDEBUG_OPT_NO_CDB_NOISE 0x4000
185#define SDEBUG_OPT_HOST_BUSY 0x8000
186#define SDEBUG_OPT_CMD_ABORT 0x10000
187#define SDEBUG_OPT_ALL_NOISE (SDEBUG_OPT_NOISE | SDEBUG_OPT_Q_NOISE | \
188 SDEBUG_OPT_RESET_NOISE)
189#define SDEBUG_OPT_ALL_INJECTING (SDEBUG_OPT_RECOVERED_ERR | \
190 SDEBUG_OPT_TRANSPORT_ERR | \
191 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR | \
192 SDEBUG_OPT_SHORT_TRANSFER | \
193 SDEBUG_OPT_HOST_BUSY | \
194 SDEBUG_OPT_CMD_ABORT)
195#define SDEBUG_OPT_RECOV_DIF_DIX (SDEBUG_OPT_RECOVERED_ERR | \
196 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR)
197
198/* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs) are returned in
199 * priority order. In the subset implemented here lower numbers have higher
200 * priority. The UA numbers should be a sequence starting from 0 with
201 * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */
202#define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */
203#define SDEBUG_UA_POOCCUR 1 /* Power on occurred */
204#define SDEBUG_UA_BUS_RESET 2
205#define SDEBUG_UA_MODE_CHANGED 3
206#define SDEBUG_UA_CAPACITY_CHANGED 4
207#define SDEBUG_UA_LUNS_CHANGED 5
208#define SDEBUG_UA_MICROCODE_CHANGED 6 /* simulate firmware change */
209#define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 7
210#define SDEBUG_NUM_UAS 8
211
212/* when 1==SDEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
213 * sector on read commands: */
214#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
215#define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
216
217/* SDEBUG_CANQUEUE is the maximum number of commands that can be queued
218 * (for response) per submit queue at one time. Can be reduced by max_queue
219 * option. Command responses are not queued when jdelay=0 and ndelay=0. The
220 * per-device DEF_CMD_PER_LUN can be changed via sysfs:
221 * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth
222 * but cannot exceed SDEBUG_CANQUEUE .
223 */
224#define SDEBUG_CANQUEUE_WORDS 3 /* a WORD is bits in a long */
225#define SDEBUG_CANQUEUE (SDEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
226#define DEF_CMD_PER_LUN SDEBUG_CANQUEUE
227
228/* UA - Unit Attention; SA - Service Action; SSU - Start Stop Unit */
229#define F_D_IN 1 /* Data-in command (e.g. READ) */
230#define F_D_OUT 2 /* Data-out command (e.g. WRITE) */
231#define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */
232#define F_D_UNKN 8
233#define F_RL_WLUN_OK 0x10 /* allowed with REPORT LUNS W-LUN */
234#define F_SKIP_UA 0x20 /* bypass UAs (e.g. INQUIRY command) */
235#define F_DELAY_OVERR 0x40 /* for commands like INQUIRY */
236#define F_SA_LOW 0x80 /* SA is in cdb byte 1, bits 4 to 0 */
237#define F_SA_HIGH 0x100 /* SA is in cdb bytes 8 and 9 */
238#define F_INV_OP 0x200 /* invalid opcode (not supported) */
239#define F_FAKE_RW 0x400 /* bypass resp_*() when fake_rw set */
240#define F_M_ACCESS 0x800 /* media access, reacts to SSU state */
241#define F_SSU_DELAY 0x1000 /* SSU command delay (long-ish) */
242#define F_SYNC_DELAY 0x2000 /* SYNCHRONIZE CACHE delay */
243
244/* Useful combinations of the above flags */
245#define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR)
246#define FF_MEDIA_IO (F_M_ACCESS | F_FAKE_RW)
247#define FF_SA (F_SA_HIGH | F_SA_LOW)
248#define F_LONG_DELAY (F_SSU_DELAY | F_SYNC_DELAY)
249
250#define SDEBUG_MAX_PARTS 4
251
252#define SDEBUG_MAX_CMD_LEN 32
253
254#define SDEB_XA_NOT_IN_USE XA_MARK_1
255
256static struct kmem_cache *queued_cmd_cache;
257
258#define TO_QUEUED_CMD(scmd) ((void *)(scmd)->host_scribble)
259#define ASSIGN_QUEUED_CMD(scmnd, qc) { (scmnd)->host_scribble = (void *) qc; }
260
261/* Zone types (zbcr05 table 25) */
262enum sdebug_z_type {
263 ZBC_ZTYPE_CNV = 0x1,
264 ZBC_ZTYPE_SWR = 0x2,
265 ZBC_ZTYPE_SWP = 0x3,
266 /* ZBC_ZTYPE_SOBR = 0x4, */
267 ZBC_ZTYPE_GAP = 0x5,
268};
269
270/* enumeration names taken from table 26, zbcr05 */
271enum sdebug_z_cond {
272 ZBC_NOT_WRITE_POINTER = 0x0,
273 ZC1_EMPTY = 0x1,
274 ZC2_IMPLICIT_OPEN = 0x2,
275 ZC3_EXPLICIT_OPEN = 0x3,
276 ZC4_CLOSED = 0x4,
277 ZC6_READ_ONLY = 0xd,
278 ZC5_FULL = 0xe,
279 ZC7_OFFLINE = 0xf,
280};
281
282struct sdeb_zone_state { /* ZBC: per zone state */
283 enum sdebug_z_type z_type;
284 enum sdebug_z_cond z_cond;
285 bool z_non_seq_resource;
286 unsigned int z_size;
287 sector_t z_start;
288 sector_t z_wp;
289};
290
291enum sdebug_err_type {
292 ERR_TMOUT_CMD = 0, /* make specific scsi command timeout */
293 ERR_FAIL_QUEUE_CMD = 1, /* make specific scsi command's */
294 /* queuecmd return failed */
295 ERR_FAIL_CMD = 2, /* make specific scsi command's */
296 /* queuecmd return succeed but */
297 /* with errors set in scsi_cmnd */
298 ERR_ABORT_CMD_FAILED = 3, /* control return FAILED from */
299 /* scsi_debug_abort() */
300 ERR_LUN_RESET_FAILED = 4, /* control return FAILED from */
301 /* scsi_debug_device_reseLUN_RESET_FAILEDt() */
302};
303
304struct sdebug_err_inject {
305 int type;
306 struct list_head list;
307 int cnt;
308 unsigned char cmd;
309 struct rcu_head rcu;
310
311 union {
312 /*
313 * For ERR_FAIL_QUEUE_CMD
314 */
315 int queuecmd_ret;
316
317 /*
318 * For ERR_FAIL_CMD
319 */
320 struct {
321 unsigned char host_byte;
322 unsigned char driver_byte;
323 unsigned char status_byte;
324 unsigned char sense_key;
325 unsigned char asc;
326 unsigned char asq;
327 };
328 };
329};
330
331struct sdebug_dev_info {
332 struct list_head dev_list;
333 unsigned int channel;
334 unsigned int target;
335 u64 lun;
336 uuid_t lu_name;
337 struct sdebug_host_info *sdbg_host;
338 unsigned long uas_bm[1];
339 atomic_t stopped; /* 1: by SSU, 2: device start */
340 bool used;
341
342 /* For ZBC devices */
343 bool zoned;
344 unsigned int zcap;
345 unsigned int zsize;
346 unsigned int zsize_shift;
347 unsigned int nr_zones;
348 unsigned int nr_conv_zones;
349 unsigned int nr_seq_zones;
350 unsigned int nr_imp_open;
351 unsigned int nr_exp_open;
352 unsigned int nr_closed;
353 unsigned int max_open;
354 ktime_t create_ts; /* time since bootup that this device was created */
355 struct sdeb_zone_state *zstate;
356
357 struct dentry *debugfs_entry;
358 struct spinlock list_lock;
359 struct list_head inject_err_list;
360};
361
362struct sdebug_target_info {
363 bool reset_fail;
364 struct dentry *debugfs_entry;
365};
366
367struct sdebug_host_info {
368 struct list_head host_list;
369 int si_idx; /* sdeb_store_info (per host) xarray index */
370 struct Scsi_Host *shost;
371 struct device dev;
372 struct list_head dev_info_list;
373};
374
375/* There is an xarray of pointers to this struct's objects, one per host */
376struct sdeb_store_info {
377 rwlock_t macc_lck; /* for atomic media access on this store */
378 u8 *storep; /* user data storage (ram) */
379 struct t10_pi_tuple *dif_storep; /* protection info */
380 void *map_storep; /* provisioning map */
381};
382
383#define dev_to_sdebug_host(d) \
384 container_of(d, struct sdebug_host_info, dev)
385
386#define shost_to_sdebug_host(shost) \
387 dev_to_sdebug_host(shost->dma_dev)
388
389enum sdeb_defer_type {SDEB_DEFER_NONE = 0, SDEB_DEFER_HRT = 1,
390 SDEB_DEFER_WQ = 2, SDEB_DEFER_POLL = 3};
391
392struct sdebug_defer {
393 struct hrtimer hrt;
394 struct execute_work ew;
395 ktime_t cmpl_ts;/* time since boot to complete this cmd */
396 int issuing_cpu;
397 bool aborted; /* true when blk_abort_request() already called */
398 enum sdeb_defer_type defer_t;
399};
400
401struct sdebug_queued_cmd {
402 /* corresponding bit set in in_use_bm[] in owning struct sdebug_queue
403 * instance indicates this slot is in use.
404 */
405 struct sdebug_defer sd_dp;
406 struct scsi_cmnd *scmd;
407};
408
409struct sdebug_scsi_cmd {
410 spinlock_t lock;
411};
412
413static atomic_t sdebug_cmnd_count; /* number of incoming commands */
414static atomic_t sdebug_completions; /* count of deferred completions */
415static atomic_t sdebug_miss_cpus; /* submission + completion cpus differ */
416static atomic_t sdebug_a_tsf; /* 'almost task set full' counter */
417static atomic_t sdeb_inject_pending;
418static atomic_t sdeb_mq_poll_count; /* bumped when mq_poll returns > 0 */
419
420struct opcode_info_t {
421 u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff */
422 /* for terminating element */
423 u8 opcode; /* if num_attached > 0, preferred */
424 u16 sa; /* service action */
425 u32 flags; /* OR-ed set of SDEB_F_* */
426 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
427 const struct opcode_info_t *arrp; /* num_attached elements or NULL */
428 u8 len_mask[16]; /* len_mask[0]-->cdb_len, then mask for cdb */
429 /* 1 to min(cdb_len, 15); ignore cdb[15...] */
430};
431
432/* SCSI opcodes (first byte of cdb) of interest mapped onto these indexes */
433enum sdeb_opcode_index {
434 SDEB_I_INVALID_OPCODE = 0,
435 SDEB_I_INQUIRY = 1,
436 SDEB_I_REPORT_LUNS = 2,
437 SDEB_I_REQUEST_SENSE = 3,
438 SDEB_I_TEST_UNIT_READY = 4,
439 SDEB_I_MODE_SENSE = 5, /* 6, 10 */
440 SDEB_I_MODE_SELECT = 6, /* 6, 10 */
441 SDEB_I_LOG_SENSE = 7,
442 SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */
443 SDEB_I_READ = 9, /* 6, 10, 12, 16 */
444 SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */
445 SDEB_I_START_STOP = 11,
446 SDEB_I_SERV_ACT_IN_16 = 12, /* add ...SERV_ACT_IN_12 if needed */
447 SDEB_I_SERV_ACT_OUT_16 = 13, /* add ...SERV_ACT_OUT_12 if needed */
448 SDEB_I_MAINT_IN = 14,
449 SDEB_I_MAINT_OUT = 15,
450 SDEB_I_VERIFY = 16, /* VERIFY(10), VERIFY(16) */
451 SDEB_I_VARIABLE_LEN = 17, /* READ(32), WRITE(32), WR_SCAT(32) */
452 SDEB_I_RESERVE = 18, /* 6, 10 */
453 SDEB_I_RELEASE = 19, /* 6, 10 */
454 SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
455 SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */
456 SDEB_I_ATA_PT = 22, /* 12, 16 */
457 SDEB_I_SEND_DIAG = 23,
458 SDEB_I_UNMAP = 24,
459 SDEB_I_WRITE_BUFFER = 25,
460 SDEB_I_WRITE_SAME = 26, /* 10, 16 */
461 SDEB_I_SYNC_CACHE = 27, /* 10, 16 */
462 SDEB_I_COMP_WRITE = 28,
463 SDEB_I_PRE_FETCH = 29, /* 10, 16 */
464 SDEB_I_ZONE_OUT = 30, /* 0x94+SA; includes no data xfer */
465 SDEB_I_ZONE_IN = 31, /* 0x95+SA; all have data-in */
466 SDEB_I_LAST_ELEM_P1 = 32, /* keep this last (previous + 1) */
467};
468
469
470static const unsigned char opcode_ind_arr[256] = {
471/* 0x0; 0x0->0x1f: 6 byte cdbs */
472 SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE,
473 0, 0, 0, 0,
474 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0,
475 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
476 SDEB_I_RELEASE,
477 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG,
478 SDEB_I_ALLOW_REMOVAL, 0,
479/* 0x20; 0x20->0x3f: 10 byte cdbs */
480 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0,
481 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY,
482 0, 0, 0, 0, SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, 0,
483 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0,
484/* 0x40; 0x40->0x5f: 10 byte cdbs */
485 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0,
486 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0,
487 0, 0, 0, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
488 SDEB_I_RELEASE,
489 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0,
490/* 0x60; 0x60->0x7d are reserved, 0x7e is "extended cdb" */
491 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
492 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
493 0, SDEB_I_VARIABLE_LEN,
494/* 0x80; 0x80->0x9f: 16 byte cdbs */
495 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0,
496 SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0,
497 0, 0, 0, SDEB_I_VERIFY,
498 SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, SDEB_I_WRITE_SAME,
499 SDEB_I_ZONE_OUT, SDEB_I_ZONE_IN, 0, 0,
500 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN_16, SDEB_I_SERV_ACT_OUT_16,
501/* 0xa0; 0xa0->0xbf: 12 byte cdbs */
502 SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN,
503 SDEB_I_MAINT_OUT, 0, 0, 0,
504 SDEB_I_READ, 0 /* SDEB_I_SERV_ACT_OUT_12 */, SDEB_I_WRITE,
505 0 /* SDEB_I_SERV_ACT_IN_12 */, 0, 0, 0, 0,
506 0, 0, 0, 0, 0, 0, 0, 0,
507 0, 0, 0, 0, 0, 0, 0, 0,
508/* 0xc0; 0xc0->0xff: vendor specific */
509 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
510 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
511 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
512 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
513};
514
515/*
516 * The following "response" functions return the SCSI mid-level's 4 byte
517 * tuple-in-an-int. To handle commands with an IMMED bit, for a faster
518 * command completion, they can mask their return value with
519 * SDEG_RES_IMMED_MASK .
520 */
521#define SDEG_RES_IMMED_MASK 0x40000000
522
523static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *);
524static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *);
525static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *);
526static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
527static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *);
528static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
529static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
530static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
531static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
532static int resp_write_scat(struct scsi_cmnd *, struct sdebug_dev_info *);
533static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
534static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
535static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
536static int resp_get_stream_status(struct scsi_cmnd *scp,
537 struct sdebug_dev_info *devip);
538static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *);
539static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *);
540static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *);
541static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *);
542static int resp_verify(struct scsi_cmnd *, struct sdebug_dev_info *);
543static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *);
544static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *);
545static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
546static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *);
547static int resp_sync_cache(struct scsi_cmnd *, struct sdebug_dev_info *);
548static int resp_pre_fetch(struct scsi_cmnd *, struct sdebug_dev_info *);
549static int resp_report_zones(struct scsi_cmnd *, struct sdebug_dev_info *);
550static int resp_open_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
551static int resp_close_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
552static int resp_finish_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
553static int resp_rwp_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
554
555static int sdebug_do_add_host(bool mk_new_store);
556static int sdebug_add_host_helper(int per_host_idx);
557static void sdebug_do_remove_host(bool the_end);
558static int sdebug_add_store(void);
559static void sdebug_erase_store(int idx, struct sdeb_store_info *sip);
560static void sdebug_erase_all_stores(bool apart_from_first);
561
562static void sdebug_free_queued_cmd(struct sdebug_queued_cmd *sqcp);
563
564/*
565 * The following are overflow arrays for cdbs that "hit" the same index in
566 * the opcode_info_arr array. The most time sensitive (or commonly used) cdb
567 * should be placed in opcode_info_arr[], the others should be placed here.
568 */
569static const struct opcode_info_t msense_iarr[] = {
570 {0, 0x1a, 0, F_D_IN, NULL, NULL,
571 {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
572};
573
574static const struct opcode_info_t mselect_iarr[] = {
575 {0, 0x15, 0, F_D_OUT, NULL, NULL,
576 {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
577};
578
579static const struct opcode_info_t read_iarr[] = {
580 {0, 0x28, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(10) */
581 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
582 0, 0, 0, 0} },
583 {0, 0x8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL, /* READ(6) */
584 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
585 {0, 0xa8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(12) */
586 {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf,
587 0xc7, 0, 0, 0, 0} },
588};
589
590static const struct opcode_info_t write_iarr[] = {
591 {0, 0x2a, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(10) */
592 NULL, {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7,
593 0, 0, 0, 0, 0, 0} },
594 {0, 0xa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(6) */
595 NULL, {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0,
596 0, 0, 0} },
597 {0, 0xaa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(12) */
598 NULL, {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
599 0xbf, 0xc7, 0, 0, 0, 0} },
600};
601
602static const struct opcode_info_t verify_iarr[] = {
603 {0, 0x2f, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify,/* VERIFY(10) */
604 NULL, {10, 0xf7, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xff, 0xff, 0xc7,
605 0, 0, 0, 0, 0, 0} },
606};
607
608static const struct opcode_info_t sa_in_16_iarr[] = {
609 {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL,
610 {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
611 0xff, 0xff, 0xff, 0, 0xc7} }, /* GET LBA STATUS(16) */
612 {0, 0x9e, 0x16, F_SA_LOW | F_D_IN, resp_get_stream_status, NULL,
613 {16, 0x16, 0, 0, 0xff, 0xff, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff,
614 0, 0} }, /* GET STREAM STATUS */
615};
616
617static const struct opcode_info_t vl_iarr[] = { /* VARIABLE LENGTH */
618 {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_dt0,
619 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0xb, 0xfa,
620 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
621 {0, 0x7f, 0x11, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
622 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x11, 0xf8,
623 0, 0xff, 0xff, 0x0, 0x0} }, /* WRITE SCATTERED(32) */
624};
625
626static const struct opcode_info_t maint_in_iarr[] = { /* MAINT IN */
627 {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL,
628 {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
629 0xc7, 0, 0, 0, 0} }, /* REPORT SUPPORTED OPERATION CODES */
630 {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL,
631 {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
632 0, 0} }, /* REPORTED SUPPORTED TASK MANAGEMENT FUNCTIONS */
633};
634
635static const struct opcode_info_t write_same_iarr[] = {
636 {0, 0x93, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_write_same_16, NULL,
637 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
638 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* WRITE SAME(16) */
639};
640
641static const struct opcode_info_t reserve_iarr[] = {
642 {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */
643 {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
644};
645
646static const struct opcode_info_t release_iarr[] = {
647 {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */
648 {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
649};
650
651static const struct opcode_info_t sync_cache_iarr[] = {
652 {0, 0x91, 0, F_SYNC_DELAY | F_M_ACCESS, resp_sync_cache, NULL,
653 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
654 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* SYNC_CACHE (16) */
655};
656
657static const struct opcode_info_t pre_fetch_iarr[] = {
658 {0, 0x90, 0, F_SYNC_DELAY | FF_MEDIA_IO, resp_pre_fetch, NULL,
659 {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
660 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* PRE-FETCH (16) */
661};
662
663static const struct opcode_info_t zone_out_iarr[] = { /* ZONE OUT(16) */
664 {0, 0x94, 0x1, F_SA_LOW | F_M_ACCESS, resp_close_zone, NULL,
665 {16, 0x1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
666 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* CLOSE ZONE */
667 {0, 0x94, 0x2, F_SA_LOW | F_M_ACCESS, resp_finish_zone, NULL,
668 {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
669 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* FINISH ZONE */
670 {0, 0x94, 0x4, F_SA_LOW | F_M_ACCESS, resp_rwp_zone, NULL,
671 {16, 0x4, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
672 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* RESET WRITE POINTER */
673};
674
675static const struct opcode_info_t zone_in_iarr[] = { /* ZONE IN(16) */
676 {0, 0x95, 0x6, F_SA_LOW | F_D_IN | F_M_ACCESS, NULL, NULL,
677 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
678 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* REPORT ZONES */
679};
680
681
682/* This array is accessed via SDEB_I_* values. Make sure all are mapped,
683 * plus the terminating elements for logic that scans this table such as
684 * REPORT SUPPORTED OPERATION CODES. */
685static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEM_P1 + 1] = {
686/* 0 */
687 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* unknown opcodes */
688 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
689 {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL, /* INQUIRY */
690 {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
691 {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL,
692 {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
693 0, 0} }, /* REPORT LUNS */
694 {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL,
695 {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
696 {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */
697 {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
698/* 5 */
699 {ARRAY_SIZE(msense_iarr), 0x5a, 0, F_D_IN, /* MODE SENSE(10) */
700 resp_mode_sense, msense_iarr, {10, 0xf8, 0xff, 0xff, 0, 0, 0,
701 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
702 {ARRAY_SIZE(mselect_iarr), 0x55, 0, F_D_OUT, /* MODE SELECT(10) */
703 resp_mode_select, mselect_iarr, {10, 0xf1, 0, 0, 0, 0, 0, 0xff,
704 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
705 {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL, /* LOG SENSE */
706 {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0,
707 0, 0, 0} },
708 {0, 0x25, 0, F_D_IN, resp_readcap, NULL, /* READ CAPACITY(10) */
709 {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0,
710 0, 0} },
711 {ARRAY_SIZE(read_iarr), 0x88, 0, F_D_IN | FF_MEDIA_IO, /* READ(16) */
712 resp_read_dt0, read_iarr, {16, 0xfe, 0xff, 0xff, 0xff, 0xff,
713 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
714/* 10 */
715 {ARRAY_SIZE(write_iarr), 0x8a, 0, F_D_OUT | FF_MEDIA_IO,
716 resp_write_dt0, write_iarr, /* WRITE(16) */
717 {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
718 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
719 {0, 0x1b, 0, F_SSU_DELAY, resp_start_stop, NULL,/* START STOP UNIT */
720 {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
721 {ARRAY_SIZE(sa_in_16_iarr), 0x9e, 0x10, F_SA_LOW | F_D_IN,
722 resp_readcap16, sa_in_16_iarr, /* SA_IN(16), READ CAPACITY(16) */
723 {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
724 0xff, 0xff, 0xff, 0xff, 0x1, 0xc7} },
725 {0, 0x9f, 0x12, F_SA_LOW | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
726 NULL, {16, 0x12, 0xf9, 0x0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff,
727 0xff, 0xff, 0xff, 0xff, 0xc7} }, /* SA_OUT(16), WRITE SCAT(16) */
728 {ARRAY_SIZE(maint_in_iarr), 0xa3, 0xa, F_SA_LOW | F_D_IN,
729 resp_report_tgtpgs, /* MAINT IN, REPORT TARGET PORT GROUPS */
730 maint_in_iarr, {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff,
731 0xff, 0, 0xc7, 0, 0, 0, 0} },
732/* 15 */
733 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */
734 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
735 {ARRAY_SIZE(verify_iarr), 0x8f, 0,
736 F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify, /* VERIFY(16) */
737 verify_iarr, {16, 0xf6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
738 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} },
739 {ARRAY_SIZE(vl_iarr), 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_MEDIA_IO,
740 resp_read_dt0, vl_iarr, /* VARIABLE LENGTH, READ(32) */
741 {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x9, 0xfe, 0, 0xff, 0xff,
742 0xff, 0xff} },
743 {ARRAY_SIZE(reserve_iarr), 0x56, 0, F_D_OUT,
744 NULL, reserve_iarr, /* RESERVE(10) <no response function> */
745 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
746 0} },
747 {ARRAY_SIZE(release_iarr), 0x57, 0, F_D_OUT,
748 NULL, release_iarr, /* RELEASE(10) <no response function> */
749 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
750 0} },
751/* 20 */
752 {0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */
753 {6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
754 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */
755 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
756 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */
757 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
758 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */
759 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
760 {0, 0x42, 0, F_D_OUT | FF_MEDIA_IO, resp_unmap, NULL, /* UNMAP */
761 {10, 0x1, 0, 0, 0, 0, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
762/* 25 */
763 {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL,
764 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0,
765 0, 0, 0, 0} }, /* WRITE_BUFFER */
766 {ARRAY_SIZE(write_same_iarr), 0x41, 0, F_D_OUT_MAYBE | FF_MEDIA_IO,
767 resp_write_same_10, write_same_iarr, /* WRITE SAME(10) */
768 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0,
769 0, 0, 0, 0, 0} },
770 {ARRAY_SIZE(sync_cache_iarr), 0x35, 0, F_SYNC_DELAY | F_M_ACCESS,
771 resp_sync_cache, sync_cache_iarr,
772 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
773 0, 0, 0, 0} }, /* SYNC_CACHE (10) */
774 {0, 0x89, 0, F_D_OUT | FF_MEDIA_IO, resp_comp_write, NULL,
775 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
776 0, 0xff, 0x3f, 0xc7} }, /* COMPARE AND WRITE */
777 {ARRAY_SIZE(pre_fetch_iarr), 0x34, 0, F_SYNC_DELAY | FF_MEDIA_IO,
778 resp_pre_fetch, pre_fetch_iarr,
779 {10, 0x2, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
780 0, 0, 0, 0} }, /* PRE-FETCH (10) */
781
782/* 30 */
783 {ARRAY_SIZE(zone_out_iarr), 0x94, 0x3, F_SA_LOW | F_M_ACCESS,
784 resp_open_zone, zone_out_iarr, /* ZONE_OUT(16), OPEN ZONE) */
785 {16, 0x3 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
786 0xff, 0xff, 0x0, 0x0, 0xff, 0xff, 0x1, 0xc7} },
787 {ARRAY_SIZE(zone_in_iarr), 0x95, 0x0, F_SA_LOW | F_M_ACCESS,
788 resp_report_zones, zone_in_iarr, /* ZONE_IN(16), REPORT ZONES) */
789 {16, 0x0 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
790 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xc7} },
791/* sentinel */
792 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */
793 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
794};
795
796static int sdebug_num_hosts;
797static int sdebug_add_host = DEF_NUM_HOST; /* in sysfs this is relative */
798static int sdebug_ato = DEF_ATO;
799static int sdebug_cdb_len = DEF_CDB_LEN;
800static int sdebug_jdelay = DEF_JDELAY; /* if > 0 then unit is jiffies */
801static int sdebug_dev_size_mb = DEF_DEV_SIZE_PRE_INIT;
802static int sdebug_dif = DEF_DIF;
803static int sdebug_dix = DEF_DIX;
804static int sdebug_dsense = DEF_D_SENSE;
805static int sdebug_every_nth = DEF_EVERY_NTH;
806static int sdebug_fake_rw = DEF_FAKE_RW;
807static unsigned int sdebug_guard = DEF_GUARD;
808static int sdebug_host_max_queue; /* per host */
809static int sdebug_lowest_aligned = DEF_LOWEST_ALIGNED;
810static int sdebug_max_luns = DEF_MAX_LUNS;
811static int sdebug_max_queue = SDEBUG_CANQUEUE; /* per submit queue */
812static unsigned int sdebug_medium_error_start = OPT_MEDIUM_ERR_ADDR;
813static int sdebug_medium_error_count = OPT_MEDIUM_ERR_NUM;
814static int sdebug_ndelay = DEF_NDELAY; /* if > 0 then unit is nanoseconds */
815static int sdebug_no_lun_0 = DEF_NO_LUN_0;
816static int sdebug_no_uld;
817static int sdebug_num_parts = DEF_NUM_PARTS;
818static int sdebug_num_tgts = DEF_NUM_TGTS; /* targets per host */
819static int sdebug_opt_blks = DEF_OPT_BLKS;
820static int sdebug_opts = DEF_OPTS;
821static int sdebug_physblk_exp = DEF_PHYSBLK_EXP;
822static int sdebug_opt_xferlen_exp = DEF_OPT_XFERLEN_EXP;
823static int sdebug_ptype = DEF_PTYPE; /* SCSI peripheral device type */
824static int sdebug_scsi_level = DEF_SCSI_LEVEL;
825static int sdebug_sector_size = DEF_SECTOR_SIZE;
826static int sdeb_tur_ms_to_ready = DEF_TUR_MS_TO_READY;
827static int sdebug_virtual_gb = DEF_VIRTUAL_GB;
828static int sdebug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
829static unsigned int sdebug_lbpu = DEF_LBPU;
830static unsigned int sdebug_lbpws = DEF_LBPWS;
831static unsigned int sdebug_lbpws10 = DEF_LBPWS10;
832static unsigned int sdebug_lbprz = DEF_LBPRZ;
833static unsigned int sdebug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
834static unsigned int sdebug_unmap_granularity = DEF_UNMAP_GRANULARITY;
835static unsigned int sdebug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
836static unsigned int sdebug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
837static unsigned int sdebug_write_same_length = DEF_WRITESAME_LENGTH;
838static int sdebug_uuid_ctl = DEF_UUID_CTL;
839static bool sdebug_random = DEF_RANDOM;
840static bool sdebug_per_host_store = DEF_PER_HOST_STORE;
841static bool sdebug_removable = DEF_REMOVABLE;
842static bool sdebug_clustering;
843static bool sdebug_host_lock = DEF_HOST_LOCK;
844static bool sdebug_strict = DEF_STRICT;
845static bool sdebug_any_injecting_opt;
846static bool sdebug_no_rwlock;
847static bool sdebug_verbose;
848static bool have_dif_prot;
849static bool write_since_sync;
850static bool sdebug_statistics = DEF_STATISTICS;
851static bool sdebug_wp;
852static bool sdebug_allow_restart;
853static enum {
854 BLK_ZONED_NONE = 0,
855 BLK_ZONED_HA = 1,
856 BLK_ZONED_HM = 2,
857} sdeb_zbc_model = BLK_ZONED_NONE;
858static char *sdeb_zbc_model_s;
859
860enum sam_lun_addr_method {SAM_LUN_AM_PERIPHERAL = 0x0,
861 SAM_LUN_AM_FLAT = 0x1,
862 SAM_LUN_AM_LOGICAL_UNIT = 0x2,
863 SAM_LUN_AM_EXTENDED = 0x3};
864static enum sam_lun_addr_method sdebug_lun_am = SAM_LUN_AM_PERIPHERAL;
865static int sdebug_lun_am_i = (int)SAM_LUN_AM_PERIPHERAL;
866
867static unsigned int sdebug_store_sectors;
868static sector_t sdebug_capacity; /* in sectors */
869
870/* old BIOS stuff, kernel may get rid of them but some mode sense pages
871 may still need them */
872static int sdebug_heads; /* heads per disk */
873static int sdebug_cylinders_per; /* cylinders per surface */
874static int sdebug_sectors_per; /* sectors per cylinder */
875
876static LIST_HEAD(sdebug_host_list);
877static DEFINE_MUTEX(sdebug_host_list_mutex);
878
879static struct xarray per_store_arr;
880static struct xarray *per_store_ap = &per_store_arr;
881static int sdeb_first_idx = -1; /* invalid index ==> none created */
882static int sdeb_most_recent_idx = -1;
883static DEFINE_RWLOCK(sdeb_fake_rw_lck); /* need a RW lock when fake_rw=1 */
884
885static unsigned long map_size;
886static int num_aborts;
887static int num_dev_resets;
888static int num_target_resets;
889static int num_bus_resets;
890static int num_host_resets;
891static int dix_writes;
892static int dix_reads;
893static int dif_errors;
894
895/* ZBC global data */
896static bool sdeb_zbc_in_use; /* true for host-aware and host-managed disks */
897static int sdeb_zbc_zone_cap_mb;
898static int sdeb_zbc_zone_size_mb;
899static int sdeb_zbc_max_open = DEF_ZBC_MAX_OPEN_ZONES;
900static int sdeb_zbc_nr_conv = DEF_ZBC_NR_CONV_ZONES;
901
902static int submit_queues = DEF_SUBMIT_QUEUES; /* > 1 for multi-queue (mq) */
903static int poll_queues; /* iouring iopoll interface.*/
904
905static atomic_long_t writes_by_group_number[64];
906
907static char sdebug_proc_name[] = MY_NAME;
908static const char *my_name = MY_NAME;
909
910static const struct bus_type pseudo_lld_bus;
911
912static struct device_driver sdebug_driverfs_driver = {
913 .name = sdebug_proc_name,
914 .bus = &pseudo_lld_bus,
915};
916
917static const int check_condition_result =
918 SAM_STAT_CHECK_CONDITION;
919
920static const int illegal_condition_result =
921 (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
922
923static const int device_qfull_result =
924 (DID_ABORT << 16) | SAM_STAT_TASK_SET_FULL;
925
926static const int condition_met_result = SAM_STAT_CONDITION_MET;
927
928static struct dentry *sdebug_debugfs_root;
929
930static void sdebug_err_free(struct rcu_head *head)
931{
932 struct sdebug_err_inject *inject =
933 container_of(head, typeof(*inject), rcu);
934
935 kfree(inject);
936}
937
938static void sdebug_err_add(struct scsi_device *sdev, struct sdebug_err_inject *new)
939{
940 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdev->hostdata;
941 struct sdebug_err_inject *err;
942
943 spin_lock(&devip->list_lock);
944 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
945 if (err->type == new->type && err->cmd == new->cmd) {
946 list_del_rcu(&err->list);
947 call_rcu(&err->rcu, sdebug_err_free);
948 }
949 }
950
951 list_add_tail_rcu(&new->list, &devip->inject_err_list);
952 spin_unlock(&devip->list_lock);
953}
954
955static int sdebug_err_remove(struct scsi_device *sdev, const char *buf, size_t count)
956{
957 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdev->hostdata;
958 struct sdebug_err_inject *err;
959 int type;
960 unsigned char cmd;
961
962 if (sscanf(buf, "- %d %hhx", &type, &cmd) != 2) {
963 kfree(buf);
964 return -EINVAL;
965 }
966
967 spin_lock(&devip->list_lock);
968 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
969 if (err->type == type && err->cmd == cmd) {
970 list_del_rcu(&err->list);
971 call_rcu(&err->rcu, sdebug_err_free);
972 spin_unlock(&devip->list_lock);
973 kfree(buf);
974 return count;
975 }
976 }
977 spin_unlock(&devip->list_lock);
978
979 kfree(buf);
980 return -EINVAL;
981}
982
983static int sdebug_error_show(struct seq_file *m, void *p)
984{
985 struct scsi_device *sdev = (struct scsi_device *)m->private;
986 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdev->hostdata;
987 struct sdebug_err_inject *err;
988
989 seq_puts(m, "Type\tCount\tCommand\n");
990
991 rcu_read_lock();
992 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
993 switch (err->type) {
994 case ERR_TMOUT_CMD:
995 case ERR_ABORT_CMD_FAILED:
996 case ERR_LUN_RESET_FAILED:
997 seq_printf(m, "%d\t%d\t0x%x\n", err->type, err->cnt,
998 err->cmd);
999 break;
1000
1001 case ERR_FAIL_QUEUE_CMD:
1002 seq_printf(m, "%d\t%d\t0x%x\t0x%x\n", err->type,
1003 err->cnt, err->cmd, err->queuecmd_ret);
1004 break;
1005
1006 case ERR_FAIL_CMD:
1007 seq_printf(m, "%d\t%d\t0x%x\t0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1008 err->type, err->cnt, err->cmd,
1009 err->host_byte, err->driver_byte,
1010 err->status_byte, err->sense_key,
1011 err->asc, err->asq);
1012 break;
1013 }
1014 }
1015 rcu_read_unlock();
1016
1017 return 0;
1018}
1019
1020static int sdebug_error_open(struct inode *inode, struct file *file)
1021{
1022 return single_open(file, sdebug_error_show, inode->i_private);
1023}
1024
1025static ssize_t sdebug_error_write(struct file *file, const char __user *ubuf,
1026 size_t count, loff_t *ppos)
1027{
1028 char *buf;
1029 unsigned int inject_type;
1030 struct sdebug_err_inject *inject;
1031 struct scsi_device *sdev = (struct scsi_device *)file->f_inode->i_private;
1032
1033 buf = kzalloc(count + 1, GFP_KERNEL);
1034 if (!buf)
1035 return -ENOMEM;
1036
1037 if (copy_from_user(buf, ubuf, count)) {
1038 kfree(buf);
1039 return -EFAULT;
1040 }
1041
1042 if (buf[0] == '-')
1043 return sdebug_err_remove(sdev, buf, count);
1044
1045 if (sscanf(buf, "%d", &inject_type) != 1) {
1046 kfree(buf);
1047 return -EINVAL;
1048 }
1049
1050 inject = kzalloc(sizeof(struct sdebug_err_inject), GFP_KERNEL);
1051 if (!inject) {
1052 kfree(buf);
1053 return -ENOMEM;
1054 }
1055
1056 switch (inject_type) {
1057 case ERR_TMOUT_CMD:
1058 case ERR_ABORT_CMD_FAILED:
1059 case ERR_LUN_RESET_FAILED:
1060 if (sscanf(buf, "%d %d %hhx", &inject->type, &inject->cnt,
1061 &inject->cmd) != 3)
1062 goto out_error;
1063 break;
1064
1065 case ERR_FAIL_QUEUE_CMD:
1066 if (sscanf(buf, "%d %d %hhx %x", &inject->type, &inject->cnt,
1067 &inject->cmd, &inject->queuecmd_ret) != 4)
1068 goto out_error;
1069 break;
1070
1071 case ERR_FAIL_CMD:
1072 if (sscanf(buf, "%d %d %hhx %hhx %hhx %hhx %hhx %hhx %hhx",
1073 &inject->type, &inject->cnt, &inject->cmd,
1074 &inject->host_byte, &inject->driver_byte,
1075 &inject->status_byte, &inject->sense_key,
1076 &inject->asc, &inject->asq) != 9)
1077 goto out_error;
1078 break;
1079
1080 default:
1081 goto out_error;
1082 break;
1083 }
1084
1085 kfree(buf);
1086 sdebug_err_add(sdev, inject);
1087
1088 return count;
1089
1090out_error:
1091 kfree(buf);
1092 kfree(inject);
1093 return -EINVAL;
1094}
1095
1096static const struct file_operations sdebug_error_fops = {
1097 .open = sdebug_error_open,
1098 .read = seq_read,
1099 .write = sdebug_error_write,
1100 .release = single_release,
1101};
1102
1103static int sdebug_target_reset_fail_show(struct seq_file *m, void *p)
1104{
1105 struct scsi_target *starget = (struct scsi_target *)m->private;
1106 struct sdebug_target_info *targetip =
1107 (struct sdebug_target_info *)starget->hostdata;
1108
1109 if (targetip)
1110 seq_printf(m, "%c\n", targetip->reset_fail ? 'Y' : 'N');
1111
1112 return 0;
1113}
1114
1115static int sdebug_target_reset_fail_open(struct inode *inode, struct file *file)
1116{
1117 return single_open(file, sdebug_target_reset_fail_show, inode->i_private);
1118}
1119
1120static ssize_t sdebug_target_reset_fail_write(struct file *file,
1121 const char __user *ubuf, size_t count, loff_t *ppos)
1122{
1123 int ret;
1124 struct scsi_target *starget =
1125 (struct scsi_target *)file->f_inode->i_private;
1126 struct sdebug_target_info *targetip =
1127 (struct sdebug_target_info *)starget->hostdata;
1128
1129 if (targetip) {
1130 ret = kstrtobool_from_user(ubuf, count, &targetip->reset_fail);
1131 return ret < 0 ? ret : count;
1132 }
1133 return -ENODEV;
1134}
1135
1136static const struct file_operations sdebug_target_reset_fail_fops = {
1137 .open = sdebug_target_reset_fail_open,
1138 .read = seq_read,
1139 .write = sdebug_target_reset_fail_write,
1140 .release = single_release,
1141};
1142
1143static int sdebug_target_alloc(struct scsi_target *starget)
1144{
1145 struct sdebug_target_info *targetip;
1146
1147 targetip = kzalloc(sizeof(struct sdebug_target_info), GFP_KERNEL);
1148 if (!targetip)
1149 return -ENOMEM;
1150
1151 targetip->debugfs_entry = debugfs_create_dir(dev_name(&starget->dev),
1152 sdebug_debugfs_root);
1153
1154 debugfs_create_file("fail_reset", 0600, targetip->debugfs_entry, starget,
1155 &sdebug_target_reset_fail_fops);
1156
1157 starget->hostdata = targetip;
1158
1159 return 0;
1160}
1161
1162static void sdebug_tartget_cleanup_async(void *data, async_cookie_t cookie)
1163{
1164 struct sdebug_target_info *targetip = data;
1165
1166 debugfs_remove(targetip->debugfs_entry);
1167 kfree(targetip);
1168}
1169
1170static void sdebug_target_destroy(struct scsi_target *starget)
1171{
1172 struct sdebug_target_info *targetip;
1173
1174 targetip = (struct sdebug_target_info *)starget->hostdata;
1175 if (targetip) {
1176 starget->hostdata = NULL;
1177 async_schedule(sdebug_tartget_cleanup_async, targetip);
1178 }
1179}
1180
1181/* Only do the extra work involved in logical block provisioning if one or
1182 * more of the lbpu, lbpws or lbpws10 parameters are given and we are doing
1183 * real reads and writes (i.e. not skipping them for speed).
1184 */
1185static inline bool scsi_debug_lbp(void)
1186{
1187 return 0 == sdebug_fake_rw &&
1188 (sdebug_lbpu || sdebug_lbpws || sdebug_lbpws10);
1189}
1190
1191static void *lba2fake_store(struct sdeb_store_info *sip,
1192 unsigned long long lba)
1193{
1194 struct sdeb_store_info *lsip = sip;
1195
1196 lba = do_div(lba, sdebug_store_sectors);
1197 if (!sip || !sip->storep) {
1198 WARN_ON_ONCE(true);
1199 lsip = xa_load(per_store_ap, 0); /* should never be NULL */
1200 }
1201 return lsip->storep + lba * sdebug_sector_size;
1202}
1203
1204static struct t10_pi_tuple *dif_store(struct sdeb_store_info *sip,
1205 sector_t sector)
1206{
1207 sector = sector_div(sector, sdebug_store_sectors);
1208
1209 return sip->dif_storep + sector;
1210}
1211
1212static void sdebug_max_tgts_luns(void)
1213{
1214 struct sdebug_host_info *sdbg_host;
1215 struct Scsi_Host *hpnt;
1216
1217 mutex_lock(&sdebug_host_list_mutex);
1218 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
1219 hpnt = sdbg_host->shost;
1220 if ((hpnt->this_id >= 0) &&
1221 (sdebug_num_tgts > hpnt->this_id))
1222 hpnt->max_id = sdebug_num_tgts + 1;
1223 else
1224 hpnt->max_id = sdebug_num_tgts;
1225 /* sdebug_max_luns; */
1226 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
1227 }
1228 mutex_unlock(&sdebug_host_list_mutex);
1229}
1230
1231enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
1232
1233/* Set in_bit to -1 to indicate no bit position of invalid field */
1234static void mk_sense_invalid_fld(struct scsi_cmnd *scp,
1235 enum sdeb_cmd_data c_d,
1236 int in_byte, int in_bit)
1237{
1238 unsigned char *sbuff;
1239 u8 sks[4];
1240 int sl, asc;
1241
1242 sbuff = scp->sense_buffer;
1243 if (!sbuff) {
1244 sdev_printk(KERN_ERR, scp->device,
1245 "%s: sense_buffer is NULL\n", __func__);
1246 return;
1247 }
1248 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
1249 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
1250 scsi_build_sense(scp, sdebug_dsense, ILLEGAL_REQUEST, asc, 0);
1251 memset(sks, 0, sizeof(sks));
1252 sks[0] = 0x80;
1253 if (c_d)
1254 sks[0] |= 0x40;
1255 if (in_bit >= 0) {
1256 sks[0] |= 0x8;
1257 sks[0] |= 0x7 & in_bit;
1258 }
1259 put_unaligned_be16(in_byte, sks + 1);
1260 if (sdebug_dsense) {
1261 sl = sbuff[7] + 8;
1262 sbuff[7] = sl;
1263 sbuff[sl] = 0x2;
1264 sbuff[sl + 1] = 0x6;
1265 memcpy(sbuff + sl + 4, sks, 3);
1266 } else
1267 memcpy(sbuff + 15, sks, 3);
1268 if (sdebug_verbose)
1269 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
1270 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
1271 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
1272}
1273
1274static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
1275{
1276 if (!scp->sense_buffer) {
1277 sdev_printk(KERN_ERR, scp->device,
1278 "%s: sense_buffer is NULL\n", __func__);
1279 return;
1280 }
1281 memset(scp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1282
1283 scsi_build_sense(scp, sdebug_dsense, key, asc, asq);
1284
1285 if (sdebug_verbose)
1286 sdev_printk(KERN_INFO, scp->device,
1287 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
1288 my_name, key, asc, asq);
1289}
1290
1291static void mk_sense_invalid_opcode(struct scsi_cmnd *scp)
1292{
1293 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
1294}
1295
1296static int scsi_debug_ioctl(struct scsi_device *dev, unsigned int cmd,
1297 void __user *arg)
1298{
1299 if (sdebug_verbose) {
1300 if (0x1261 == cmd)
1301 sdev_printk(KERN_INFO, dev,
1302 "%s: BLKFLSBUF [0x1261]\n", __func__);
1303 else if (0x5331 == cmd)
1304 sdev_printk(KERN_INFO, dev,
1305 "%s: CDROM_GET_CAPABILITY [0x5331]\n",
1306 __func__);
1307 else
1308 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
1309 __func__, cmd);
1310 }
1311 return -EINVAL;
1312 /* return -ENOTTY; // correct return but upsets fdisk */
1313}
1314
1315static void config_cdb_len(struct scsi_device *sdev)
1316{
1317 switch (sdebug_cdb_len) {
1318 case 6: /* suggest 6 byte READ, WRITE and MODE SENSE/SELECT */
1319 sdev->use_10_for_rw = false;
1320 sdev->use_16_for_rw = false;
1321 sdev->use_10_for_ms = false;
1322 break;
1323 case 10: /* suggest 10 byte RWs and 6 byte MODE SENSE/SELECT */
1324 sdev->use_10_for_rw = true;
1325 sdev->use_16_for_rw = false;
1326 sdev->use_10_for_ms = false;
1327 break;
1328 case 12: /* suggest 10 byte RWs and 10 byte MODE SENSE/SELECT */
1329 sdev->use_10_for_rw = true;
1330 sdev->use_16_for_rw = false;
1331 sdev->use_10_for_ms = true;
1332 break;
1333 case 16:
1334 sdev->use_10_for_rw = false;
1335 sdev->use_16_for_rw = true;
1336 sdev->use_10_for_ms = true;
1337 break;
1338 case 32: /* No knobs to suggest this so same as 16 for now */
1339 sdev->use_10_for_rw = false;
1340 sdev->use_16_for_rw = true;
1341 sdev->use_10_for_ms = true;
1342 break;
1343 default:
1344 pr_warn("unexpected cdb_len=%d, force to 10\n",
1345 sdebug_cdb_len);
1346 sdev->use_10_for_rw = true;
1347 sdev->use_16_for_rw = false;
1348 sdev->use_10_for_ms = false;
1349 sdebug_cdb_len = 10;
1350 break;
1351 }
1352}
1353
1354static void all_config_cdb_len(void)
1355{
1356 struct sdebug_host_info *sdbg_host;
1357 struct Scsi_Host *shost;
1358 struct scsi_device *sdev;
1359
1360 mutex_lock(&sdebug_host_list_mutex);
1361 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
1362 shost = sdbg_host->shost;
1363 shost_for_each_device(sdev, shost) {
1364 config_cdb_len(sdev);
1365 }
1366 }
1367 mutex_unlock(&sdebug_host_list_mutex);
1368}
1369
1370static void clear_luns_changed_on_target(struct sdebug_dev_info *devip)
1371{
1372 struct sdebug_host_info *sdhp = devip->sdbg_host;
1373 struct sdebug_dev_info *dp;
1374
1375 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
1376 if ((devip->sdbg_host == dp->sdbg_host) &&
1377 (devip->target == dp->target)) {
1378 clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
1379 }
1380 }
1381}
1382
1383static int make_ua(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1384{
1385 int k;
1386
1387 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
1388 if (k != SDEBUG_NUM_UAS) {
1389 const char *cp = NULL;
1390
1391 switch (k) {
1392 case SDEBUG_UA_POR:
1393 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
1394 POWER_ON_RESET_ASCQ);
1395 if (sdebug_verbose)
1396 cp = "power on reset";
1397 break;
1398 case SDEBUG_UA_POOCCUR:
1399 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
1400 POWER_ON_OCCURRED_ASCQ);
1401 if (sdebug_verbose)
1402 cp = "power on occurred";
1403 break;
1404 case SDEBUG_UA_BUS_RESET:
1405 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
1406 BUS_RESET_ASCQ);
1407 if (sdebug_verbose)
1408 cp = "bus reset";
1409 break;
1410 case SDEBUG_UA_MODE_CHANGED:
1411 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
1412 MODE_CHANGED_ASCQ);
1413 if (sdebug_verbose)
1414 cp = "mode parameters changed";
1415 break;
1416 case SDEBUG_UA_CAPACITY_CHANGED:
1417 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
1418 CAPACITY_CHANGED_ASCQ);
1419 if (sdebug_verbose)
1420 cp = "capacity data changed";
1421 break;
1422 case SDEBUG_UA_MICROCODE_CHANGED:
1423 mk_sense_buffer(scp, UNIT_ATTENTION,
1424 TARGET_CHANGED_ASC,
1425 MICROCODE_CHANGED_ASCQ);
1426 if (sdebug_verbose)
1427 cp = "microcode has been changed";
1428 break;
1429 case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET:
1430 mk_sense_buffer(scp, UNIT_ATTENTION,
1431 TARGET_CHANGED_ASC,
1432 MICROCODE_CHANGED_WO_RESET_ASCQ);
1433 if (sdebug_verbose)
1434 cp = "microcode has been changed without reset";
1435 break;
1436 case SDEBUG_UA_LUNS_CHANGED:
1437 /*
1438 * SPC-3 behavior is to report a UNIT ATTENTION with
1439 * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN
1440 * on the target, until a REPORT LUNS command is
1441 * received. SPC-4 behavior is to report it only once.
1442 * NOTE: sdebug_scsi_level does not use the same
1443 * values as struct scsi_device->scsi_level.
1444 */
1445 if (sdebug_scsi_level >= 6) /* SPC-4 and above */
1446 clear_luns_changed_on_target(devip);
1447 mk_sense_buffer(scp, UNIT_ATTENTION,
1448 TARGET_CHANGED_ASC,
1449 LUNS_CHANGED_ASCQ);
1450 if (sdebug_verbose)
1451 cp = "reported luns data has changed";
1452 break;
1453 default:
1454 pr_warn("unexpected unit attention code=%d\n", k);
1455 if (sdebug_verbose)
1456 cp = "unknown";
1457 break;
1458 }
1459 clear_bit(k, devip->uas_bm);
1460 if (sdebug_verbose)
1461 sdev_printk(KERN_INFO, scp->device,
1462 "%s reports: Unit attention: %s\n",
1463 my_name, cp);
1464 return check_condition_result;
1465 }
1466 return 0;
1467}
1468
1469/* Build SCSI "data-in" buffer. Returns 0 if ok else (DID_ERROR << 16). */
1470static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1471 int arr_len)
1472{
1473 int act_len;
1474 struct scsi_data_buffer *sdb = &scp->sdb;
1475
1476 if (!sdb->length)
1477 return 0;
1478 if (scp->sc_data_direction != DMA_FROM_DEVICE)
1479 return DID_ERROR << 16;
1480
1481 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
1482 arr, arr_len);
1483 scsi_set_resid(scp, scsi_bufflen(scp) - act_len);
1484
1485 return 0;
1486}
1487
1488/* Partial build of SCSI "data-in" buffer. Returns 0 if ok else
1489 * (DID_ERROR << 16). Can write to offset in data-in buffer. If multiple
1490 * calls, not required to write in ascending offset order. Assumes resid
1491 * set to scsi_bufflen() prior to any calls.
1492 */
1493static int p_fill_from_dev_buffer(struct scsi_cmnd *scp, const void *arr,
1494 int arr_len, unsigned int off_dst)
1495{
1496 unsigned int act_len, n;
1497 struct scsi_data_buffer *sdb = &scp->sdb;
1498 off_t skip = off_dst;
1499
1500 if (sdb->length <= off_dst)
1501 return 0;
1502 if (scp->sc_data_direction != DMA_FROM_DEVICE)
1503 return DID_ERROR << 16;
1504
1505 act_len = sg_pcopy_from_buffer(sdb->table.sgl, sdb->table.nents,
1506 arr, arr_len, skip);
1507 pr_debug("%s: off_dst=%u, scsi_bufflen=%u, act_len=%u, resid=%d\n",
1508 __func__, off_dst, scsi_bufflen(scp), act_len,
1509 scsi_get_resid(scp));
1510 n = scsi_bufflen(scp) - (off_dst + act_len);
1511 scsi_set_resid(scp, min_t(u32, scsi_get_resid(scp), n));
1512 return 0;
1513}
1514
1515/* Fetches from SCSI "data-out" buffer. Returns number of bytes fetched into
1516 * 'arr' or -1 if error.
1517 */
1518static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1519 int arr_len)
1520{
1521 if (!scsi_bufflen(scp))
1522 return 0;
1523 if (scp->sc_data_direction != DMA_TO_DEVICE)
1524 return -1;
1525
1526 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
1527}
1528
1529
1530static char sdebug_inq_vendor_id[9] = "Linux ";
1531static char sdebug_inq_product_id[17] = "scsi_debug ";
1532static char sdebug_inq_product_rev[5] = SDEBUG_VERSION;
1533/* Use some locally assigned NAAs for SAS addresses. */
1534static const u64 naa3_comp_a = 0x3222222000000000ULL;
1535static const u64 naa3_comp_b = 0x3333333000000000ULL;
1536static const u64 naa3_comp_c = 0x3111111000000000ULL;
1537
1538/* Device identification VPD page. Returns number of bytes placed in arr */
1539static int inquiry_vpd_83(unsigned char *arr, int port_group_id,
1540 int target_dev_id, int dev_id_num,
1541 const char *dev_id_str, int dev_id_str_len,
1542 const uuid_t *lu_name)
1543{
1544 int num, port_a;
1545 char b[32];
1546
1547 port_a = target_dev_id + 1;
1548 /* T10 vendor identifier field format (faked) */
1549 arr[0] = 0x2; /* ASCII */
1550 arr[1] = 0x1;
1551 arr[2] = 0x0;
1552 memcpy(&arr[4], sdebug_inq_vendor_id, 8);
1553 memcpy(&arr[12], sdebug_inq_product_id, 16);
1554 memcpy(&arr[28], dev_id_str, dev_id_str_len);
1555 num = 8 + 16 + dev_id_str_len;
1556 arr[3] = num;
1557 num += 4;
1558 if (dev_id_num >= 0) {
1559 if (sdebug_uuid_ctl) {
1560 /* Locally assigned UUID */
1561 arr[num++] = 0x1; /* binary (not necessarily sas) */
1562 arr[num++] = 0xa; /* PIV=0, lu, naa */
1563 arr[num++] = 0x0;
1564 arr[num++] = 0x12;
1565 arr[num++] = 0x10; /* uuid type=1, locally assigned */
1566 arr[num++] = 0x0;
1567 memcpy(arr + num, lu_name, 16);
1568 num += 16;
1569 } else {
1570 /* NAA-3, Logical unit identifier (binary) */
1571 arr[num++] = 0x1; /* binary (not necessarily sas) */
1572 arr[num++] = 0x3; /* PIV=0, lu, naa */
1573 arr[num++] = 0x0;
1574 arr[num++] = 0x8;
1575 put_unaligned_be64(naa3_comp_b + dev_id_num, arr + num);
1576 num += 8;
1577 }
1578 /* Target relative port number */
1579 arr[num++] = 0x61; /* proto=sas, binary */
1580 arr[num++] = 0x94; /* PIV=1, target port, rel port */
1581 arr[num++] = 0x0; /* reserved */
1582 arr[num++] = 0x4; /* length */
1583 arr[num++] = 0x0; /* reserved */
1584 arr[num++] = 0x0; /* reserved */
1585 arr[num++] = 0x0;
1586 arr[num++] = 0x1; /* relative port A */
1587 }
1588 /* NAA-3, Target port identifier */
1589 arr[num++] = 0x61; /* proto=sas, binary */
1590 arr[num++] = 0x93; /* piv=1, target port, naa */
1591 arr[num++] = 0x0;
1592 arr[num++] = 0x8;
1593 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1594 num += 8;
1595 /* NAA-3, Target port group identifier */
1596 arr[num++] = 0x61; /* proto=sas, binary */
1597 arr[num++] = 0x95; /* piv=1, target port group id */
1598 arr[num++] = 0x0;
1599 arr[num++] = 0x4;
1600 arr[num++] = 0;
1601 arr[num++] = 0;
1602 put_unaligned_be16(port_group_id, arr + num);
1603 num += 2;
1604 /* NAA-3, Target device identifier */
1605 arr[num++] = 0x61; /* proto=sas, binary */
1606 arr[num++] = 0xa3; /* piv=1, target device, naa */
1607 arr[num++] = 0x0;
1608 arr[num++] = 0x8;
1609 put_unaligned_be64(naa3_comp_a + target_dev_id, arr + num);
1610 num += 8;
1611 /* SCSI name string: Target device identifier */
1612 arr[num++] = 0x63; /* proto=sas, UTF-8 */
1613 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
1614 arr[num++] = 0x0;
1615 arr[num++] = 24;
1616 memcpy(arr + num, "naa.32222220", 12);
1617 num += 12;
1618 snprintf(b, sizeof(b), "%08X", target_dev_id);
1619 memcpy(arr + num, b, 8);
1620 num += 8;
1621 memset(arr + num, 0, 4);
1622 num += 4;
1623 return num;
1624}
1625
1626static unsigned char vpd84_data[] = {
1627/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
1628 0x22,0x22,0x22,0x0,0xbb,0x1,
1629 0x22,0x22,0x22,0x0,0xbb,0x2,
1630};
1631
1632/* Software interface identification VPD page */
1633static int inquiry_vpd_84(unsigned char *arr)
1634{
1635 memcpy(arr, vpd84_data, sizeof(vpd84_data));
1636 return sizeof(vpd84_data);
1637}
1638
1639/* Management network addresses VPD page */
1640static int inquiry_vpd_85(unsigned char *arr)
1641{
1642 int num = 0;
1643 const char *na1 = "https://www.kernel.org/config";
1644 const char *na2 = "http://www.kernel.org/log";
1645 int plen, olen;
1646
1647 arr[num++] = 0x1; /* lu, storage config */
1648 arr[num++] = 0x0; /* reserved */
1649 arr[num++] = 0x0;
1650 olen = strlen(na1);
1651 plen = olen + 1;
1652 if (plen % 4)
1653 plen = ((plen / 4) + 1) * 4;
1654 arr[num++] = plen; /* length, null termianted, padded */
1655 memcpy(arr + num, na1, olen);
1656 memset(arr + num + olen, 0, plen - olen);
1657 num += plen;
1658
1659 arr[num++] = 0x4; /* lu, logging */
1660 arr[num++] = 0x0; /* reserved */
1661 arr[num++] = 0x0;
1662 olen = strlen(na2);
1663 plen = olen + 1;
1664 if (plen % 4)
1665 plen = ((plen / 4) + 1) * 4;
1666 arr[num++] = plen; /* length, null terminated, padded */
1667 memcpy(arr + num, na2, olen);
1668 memset(arr + num + olen, 0, plen - olen);
1669 num += plen;
1670
1671 return num;
1672}
1673
1674/* SCSI ports VPD page */
1675static int inquiry_vpd_88(unsigned char *arr, int target_dev_id)
1676{
1677 int num = 0;
1678 int port_a, port_b;
1679
1680 port_a = target_dev_id + 1;
1681 port_b = port_a + 1;
1682 arr[num++] = 0x0; /* reserved */
1683 arr[num++] = 0x0; /* reserved */
1684 arr[num++] = 0x0;
1685 arr[num++] = 0x1; /* relative port 1 (primary) */
1686 memset(arr + num, 0, 6);
1687 num += 6;
1688 arr[num++] = 0x0;
1689 arr[num++] = 12; /* length tp descriptor */
1690 /* naa-5 target port identifier (A) */
1691 arr[num++] = 0x61; /* proto=sas, binary */
1692 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1693 arr[num++] = 0x0; /* reserved */
1694 arr[num++] = 0x8; /* length */
1695 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1696 num += 8;
1697 arr[num++] = 0x0; /* reserved */
1698 arr[num++] = 0x0; /* reserved */
1699 arr[num++] = 0x0;
1700 arr[num++] = 0x2; /* relative port 2 (secondary) */
1701 memset(arr + num, 0, 6);
1702 num += 6;
1703 arr[num++] = 0x0;
1704 arr[num++] = 12; /* length tp descriptor */
1705 /* naa-5 target port identifier (B) */
1706 arr[num++] = 0x61; /* proto=sas, binary */
1707 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1708 arr[num++] = 0x0; /* reserved */
1709 arr[num++] = 0x8; /* length */
1710 put_unaligned_be64(naa3_comp_a + port_b, arr + num);
1711 num += 8;
1712
1713 return num;
1714}
1715
1716
1717static unsigned char vpd89_data[] = {
1718/* from 4th byte */ 0,0,0,0,
1719'l','i','n','u','x',' ',' ',' ',
1720'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
1721'1','2','3','4',
17220x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
17230xec,0,0,0,
17240x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
17250,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
17260x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
17270x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
17280x53,0x41,
17290x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
17300x20,0x20,
17310x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
17320x10,0x80,
17330,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
17340x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
17350x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
17360,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
17370x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
17380x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
17390,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
17400,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17410,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17420,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17430x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
17440,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
17450xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
17460,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
17470,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17480,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17490,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17500,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17510,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17520,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17530,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17540,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17550,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17560,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17570,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17580,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
1759};
1760
1761/* ATA Information VPD page */
1762static int inquiry_vpd_89(unsigned char *arr)
1763{
1764 memcpy(arr, vpd89_data, sizeof(vpd89_data));
1765 return sizeof(vpd89_data);
1766}
1767
1768
1769static unsigned char vpdb0_data[] = {
1770 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
1771 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1772 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1773 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1774};
1775
1776/* Block limits VPD page (SBC-3) */
1777static int inquiry_vpd_b0(unsigned char *arr)
1778{
1779 unsigned int gran;
1780
1781 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
1782
1783 /* Optimal transfer length granularity */
1784 if (sdebug_opt_xferlen_exp != 0 &&
1785 sdebug_physblk_exp < sdebug_opt_xferlen_exp)
1786 gran = 1 << sdebug_opt_xferlen_exp;
1787 else
1788 gran = 1 << sdebug_physblk_exp;
1789 put_unaligned_be16(gran, arr + 2);
1790
1791 /* Maximum Transfer Length */
1792 if (sdebug_store_sectors > 0x400)
1793 put_unaligned_be32(sdebug_store_sectors, arr + 4);
1794
1795 /* Optimal Transfer Length */
1796 put_unaligned_be32(sdebug_opt_blks, &arr[8]);
1797
1798 if (sdebug_lbpu) {
1799 /* Maximum Unmap LBA Count */
1800 put_unaligned_be32(sdebug_unmap_max_blocks, &arr[16]);
1801
1802 /* Maximum Unmap Block Descriptor Count */
1803 put_unaligned_be32(sdebug_unmap_max_desc, &arr[20]);
1804 }
1805
1806 /* Unmap Granularity Alignment */
1807 if (sdebug_unmap_alignment) {
1808 put_unaligned_be32(sdebug_unmap_alignment, &arr[28]);
1809 arr[28] |= 0x80; /* UGAVALID */
1810 }
1811
1812 /* Optimal Unmap Granularity */
1813 put_unaligned_be32(sdebug_unmap_granularity, &arr[24]);
1814
1815 /* Maximum WRITE SAME Length */
1816 put_unaligned_be64(sdebug_write_same_length, &arr[32]);
1817
1818 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
1819}
1820
1821/* Block device characteristics VPD page (SBC-3) */
1822static int inquiry_vpd_b1(struct sdebug_dev_info *devip, unsigned char *arr)
1823{
1824 memset(arr, 0, 0x3c);
1825 arr[0] = 0;
1826 arr[1] = 1; /* non rotating medium (e.g. solid state) */
1827 arr[2] = 0;
1828 arr[3] = 5; /* less than 1.8" */
1829
1830 return 0x3c;
1831}
1832
1833/* Logical block provisioning VPD page (SBC-4) */
1834static int inquiry_vpd_b2(unsigned char *arr)
1835{
1836 memset(arr, 0, 0x4);
1837 arr[0] = 0; /* threshold exponent */
1838 if (sdebug_lbpu)
1839 arr[1] = 1 << 7;
1840 if (sdebug_lbpws)
1841 arr[1] |= 1 << 6;
1842 if (sdebug_lbpws10)
1843 arr[1] |= 1 << 5;
1844 if (sdebug_lbprz && scsi_debug_lbp())
1845 arr[1] |= (sdebug_lbprz & 0x7) << 2; /* sbc4r07 and later */
1846 /* anc_sup=0; dp=0 (no provisioning group descriptor) */
1847 /* minimum_percentage=0; provisioning_type=0 (unknown) */
1848 /* threshold_percentage=0 */
1849 return 0x4;
1850}
1851
1852/* Zoned block device characteristics VPD page (ZBC mandatory) */
1853static int inquiry_vpd_b6(struct sdebug_dev_info *devip, unsigned char *arr)
1854{
1855 memset(arr, 0, 0x3c);
1856 arr[0] = 0x1; /* set URSWRZ (unrestricted read in seq. wr req zone) */
1857 /*
1858 * Set Optimal number of open sequential write preferred zones and
1859 * Optimal number of non-sequentially written sequential write
1860 * preferred zones fields to 'not reported' (0xffffffff). Leave other
1861 * fields set to zero, apart from Max. number of open swrz_s field.
1862 */
1863 put_unaligned_be32(0xffffffff, &arr[4]);
1864 put_unaligned_be32(0xffffffff, &arr[8]);
1865 if (sdeb_zbc_model == BLK_ZONED_HM && devip->max_open)
1866 put_unaligned_be32(devip->max_open, &arr[12]);
1867 else
1868 put_unaligned_be32(0xffffffff, &arr[12]);
1869 if (devip->zcap < devip->zsize) {
1870 arr[19] = ZBC_CONSTANT_ZONE_START_OFFSET;
1871 put_unaligned_be64(devip->zsize, &arr[20]);
1872 } else {
1873 arr[19] = 0;
1874 }
1875 return 0x3c;
1876}
1877
1878#define SDEBUG_BLE_LEN_AFTER_B4 28 /* thus vpage 32 bytes long */
1879
1880enum { MAXIMUM_NUMBER_OF_STREAMS = 6, PERMANENT_STREAM_COUNT = 5 };
1881
1882/* Block limits extension VPD page (SBC-4) */
1883static int inquiry_vpd_b7(unsigned char *arrb4)
1884{
1885 memset(arrb4, 0, SDEBUG_BLE_LEN_AFTER_B4);
1886 arrb4[1] = 1; /* Reduced stream control support (RSCS) */
1887 put_unaligned_be16(MAXIMUM_NUMBER_OF_STREAMS, &arrb4[2]);
1888 return SDEBUG_BLE_LEN_AFTER_B4;
1889}
1890
1891#define SDEBUG_LONG_INQ_SZ 96
1892#define SDEBUG_MAX_INQ_ARR_SZ 584
1893
1894static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1895{
1896 unsigned char pq_pdt;
1897 unsigned char *arr;
1898 unsigned char *cmd = scp->cmnd;
1899 u32 alloc_len, n;
1900 int ret;
1901 bool have_wlun, is_disk, is_zbc, is_disk_zbc;
1902
1903 alloc_len = get_unaligned_be16(cmd + 3);
1904 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
1905 if (! arr)
1906 return DID_REQUEUE << 16;
1907 is_disk = (sdebug_ptype == TYPE_DISK);
1908 is_zbc = devip->zoned;
1909 is_disk_zbc = (is_disk || is_zbc);
1910 have_wlun = scsi_is_wlun(scp->device->lun);
1911 if (have_wlun)
1912 pq_pdt = TYPE_WLUN; /* present, wlun */
1913 else if (sdebug_no_lun_0 && (devip->lun == SDEBUG_LUN_0_VAL))
1914 pq_pdt = 0x7f; /* not present, PQ=3, PDT=0x1f */
1915 else
1916 pq_pdt = (sdebug_ptype & 0x1f);
1917 arr[0] = pq_pdt;
1918 if (0x2 & cmd[1]) { /* CMDDT bit set */
1919 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
1920 kfree(arr);
1921 return check_condition_result;
1922 } else if (0x1 & cmd[1]) { /* EVPD bit set */
1923 int lu_id_num, port_group_id, target_dev_id;
1924 u32 len;
1925 char lu_id_str[6];
1926 int host_no = devip->sdbg_host->shost->host_no;
1927
1928 arr[1] = cmd[2];
1929 port_group_id = (((host_no + 1) & 0x7f) << 8) +
1930 (devip->channel & 0x7f);
1931 if (sdebug_vpd_use_hostno == 0)
1932 host_no = 0;
1933 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) +
1934 (devip->target * 1000) + devip->lun);
1935 target_dev_id = ((host_no + 1) * 2000) +
1936 (devip->target * 1000) - 3;
1937 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
1938 if (0 == cmd[2]) { /* supported vital product data pages */
1939 n = 4;
1940 arr[n++] = 0x0; /* this page */
1941 arr[n++] = 0x80; /* unit serial number */
1942 arr[n++] = 0x83; /* device identification */
1943 arr[n++] = 0x84; /* software interface ident. */
1944 arr[n++] = 0x85; /* management network addresses */
1945 arr[n++] = 0x86; /* extended inquiry */
1946 arr[n++] = 0x87; /* mode page policy */
1947 arr[n++] = 0x88; /* SCSI ports */
1948 if (is_disk_zbc) { /* SBC or ZBC */
1949 arr[n++] = 0x89; /* ATA information */
1950 arr[n++] = 0xb0; /* Block limits */
1951 arr[n++] = 0xb1; /* Block characteristics */
1952 if (is_disk)
1953 arr[n++] = 0xb2; /* LB Provisioning */
1954 if (is_zbc)
1955 arr[n++] = 0xb6; /* ZB dev. char. */
1956 arr[n++] = 0xb7; /* Block limits extension */
1957 }
1958 arr[3] = n - 4; /* number of supported VPD pages */
1959 } else if (0x80 == cmd[2]) { /* unit serial number */
1960 arr[3] = len;
1961 memcpy(&arr[4], lu_id_str, len);
1962 } else if (0x83 == cmd[2]) { /* device identification */
1963 arr[3] = inquiry_vpd_83(&arr[4], port_group_id,
1964 target_dev_id, lu_id_num,
1965 lu_id_str, len,
1966 &devip->lu_name);
1967 } else if (0x84 == cmd[2]) { /* Software interface ident. */
1968 arr[3] = inquiry_vpd_84(&arr[4]);
1969 } else if (0x85 == cmd[2]) { /* Management network addresses */
1970 arr[3] = inquiry_vpd_85(&arr[4]);
1971 } else if (0x86 == cmd[2]) { /* extended inquiry */
1972 arr[3] = 0x3c; /* number of following entries */
1973 if (sdebug_dif == T10_PI_TYPE3_PROTECTION)
1974 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
1975 else if (have_dif_prot)
1976 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
1977 else
1978 arr[4] = 0x0; /* no protection stuff */
1979 /*
1980 * GROUP_SUP=1; HEADSUP=1 (HEAD OF QUEUE); ORDSUP=1
1981 * (ORDERED queuing); SIMPSUP=1 (SIMPLE queuing).
1982 */
1983 arr[5] = 0x17;
1984 } else if (0x87 == cmd[2]) { /* mode page policy */
1985 arr[3] = 0x8; /* number of following entries */
1986 arr[4] = 0x2; /* disconnect-reconnect mp */
1987 arr[6] = 0x80; /* mlus, shared */
1988 arr[8] = 0x18; /* protocol specific lu */
1989 arr[10] = 0x82; /* mlus, per initiator port */
1990 } else if (0x88 == cmd[2]) { /* SCSI Ports */
1991 arr[3] = inquiry_vpd_88(&arr[4], target_dev_id);
1992 } else if (is_disk_zbc && 0x89 == cmd[2]) { /* ATA info */
1993 n = inquiry_vpd_89(&arr[4]);
1994 put_unaligned_be16(n, arr + 2);
1995 } else if (is_disk_zbc && 0xb0 == cmd[2]) { /* Block limits */
1996 arr[3] = inquiry_vpd_b0(&arr[4]);
1997 } else if (is_disk_zbc && 0xb1 == cmd[2]) { /* Block char. */
1998 arr[3] = inquiry_vpd_b1(devip, &arr[4]);
1999 } else if (is_disk && 0xb2 == cmd[2]) { /* LB Prov. */
2000 arr[3] = inquiry_vpd_b2(&arr[4]);
2001 } else if (is_zbc && cmd[2] == 0xb6) { /* ZB dev. charact. */
2002 arr[3] = inquiry_vpd_b6(devip, &arr[4]);
2003 } else if (cmd[2] == 0xb7) { /* block limits extension page */
2004 arr[3] = inquiry_vpd_b7(&arr[4]);
2005 } else {
2006 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
2007 kfree(arr);
2008 return check_condition_result;
2009 }
2010 len = min_t(u32, get_unaligned_be16(arr + 2) + 4, alloc_len);
2011 ret = fill_from_dev_buffer(scp, arr,
2012 min_t(u32, len, SDEBUG_MAX_INQ_ARR_SZ));
2013 kfree(arr);
2014 return ret;
2015 }
2016 /* drops through here for a standard inquiry */
2017 arr[1] = sdebug_removable ? 0x80 : 0; /* Removable disk */
2018 arr[2] = sdebug_scsi_level;
2019 arr[3] = 2; /* response_data_format==2 */
2020 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
2021 arr[5] = (int)have_dif_prot; /* PROTECT bit */
2022 if (sdebug_vpd_use_hostno == 0)
2023 arr[5] |= 0x10; /* claim: implicit TPGS */
2024 arr[6] = 0x10; /* claim: MultiP */
2025 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
2026 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
2027 memcpy(&arr[8], sdebug_inq_vendor_id, 8);
2028 memcpy(&arr[16], sdebug_inq_product_id, 16);
2029 memcpy(&arr[32], sdebug_inq_product_rev, 4);
2030 /* Use Vendor Specific area to place driver date in ASCII hex */
2031 memcpy(&arr[36], sdebug_version_date, 8);
2032 /* version descriptors (2 bytes each) follow */
2033 put_unaligned_be16(0xc0, arr + 58); /* SAM-6 no version claimed */
2034 put_unaligned_be16(0x5c0, arr + 60); /* SPC-5 no version claimed */
2035 n = 62;
2036 if (is_disk) { /* SBC-4 no version claimed */
2037 put_unaligned_be16(0x600, arr + n);
2038 n += 2;
2039 } else if (sdebug_ptype == TYPE_TAPE) { /* SSC-4 rev 3 */
2040 put_unaligned_be16(0x525, arr + n);
2041 n += 2;
2042 } else if (is_zbc) { /* ZBC BSR INCITS 536 revision 05 */
2043 put_unaligned_be16(0x624, arr + n);
2044 n += 2;
2045 }
2046 put_unaligned_be16(0x2100, arr + n); /* SPL-4 no version claimed */
2047 ret = fill_from_dev_buffer(scp, arr,
2048 min_t(u32, alloc_len, SDEBUG_LONG_INQ_SZ));
2049 kfree(arr);
2050 return ret;
2051}
2052
2053/* See resp_iec_m_pg() for how this data is manipulated */
2054static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
2055 0, 0, 0x0, 0x0};
2056
2057static int resp_requests(struct scsi_cmnd *scp,
2058 struct sdebug_dev_info *devip)
2059{
2060 unsigned char *cmd = scp->cmnd;
2061 unsigned char arr[SCSI_SENSE_BUFFERSIZE]; /* assume >= 18 bytes */
2062 bool dsense = !!(cmd[1] & 1);
2063 u32 alloc_len = cmd[4];
2064 u32 len = 18;
2065 int stopped_state = atomic_read(&devip->stopped);
2066
2067 memset(arr, 0, sizeof(arr));
2068 if (stopped_state > 0) { /* some "pollable" data [spc6r02: 5.12.2] */
2069 if (dsense) {
2070 arr[0] = 0x72;
2071 arr[1] = NOT_READY;
2072 arr[2] = LOGICAL_UNIT_NOT_READY;
2073 arr[3] = (stopped_state == 2) ? 0x1 : 0x2;
2074 len = 8;
2075 } else {
2076 arr[0] = 0x70;
2077 arr[2] = NOT_READY; /* NO_SENSE in sense_key */
2078 arr[7] = 0xa; /* 18 byte sense buffer */
2079 arr[12] = LOGICAL_UNIT_NOT_READY;
2080 arr[13] = (stopped_state == 2) ? 0x1 : 0x2;
2081 }
2082 } else if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
2083 /* Information exceptions control mode page: TEST=1, MRIE=6 */
2084 if (dsense) {
2085 arr[0] = 0x72;
2086 arr[1] = 0x0; /* NO_SENSE in sense_key */
2087 arr[2] = THRESHOLD_EXCEEDED;
2088 arr[3] = 0xff; /* Failure prediction(false) */
2089 len = 8;
2090 } else {
2091 arr[0] = 0x70;
2092 arr[2] = 0x0; /* NO_SENSE in sense_key */
2093 arr[7] = 0xa; /* 18 byte sense buffer */
2094 arr[12] = THRESHOLD_EXCEEDED;
2095 arr[13] = 0xff; /* Failure prediction(false) */
2096 }
2097 } else { /* nothing to report */
2098 if (dsense) {
2099 len = 8;
2100 memset(arr, 0, len);
2101 arr[0] = 0x72;
2102 } else {
2103 memset(arr, 0, len);
2104 arr[0] = 0x70;
2105 arr[7] = 0xa;
2106 }
2107 }
2108 return fill_from_dev_buffer(scp, arr, min_t(u32, len, alloc_len));
2109}
2110
2111static int resp_start_stop(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2112{
2113 unsigned char *cmd = scp->cmnd;
2114 int power_cond, want_stop, stopped_state;
2115 bool changing;
2116
2117 power_cond = (cmd[4] & 0xf0) >> 4;
2118 if (power_cond) {
2119 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
2120 return check_condition_result;
2121 }
2122 want_stop = !(cmd[4] & 1);
2123 stopped_state = atomic_read(&devip->stopped);
2124 if (stopped_state == 2) {
2125 ktime_t now_ts = ktime_get_boottime();
2126
2127 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) {
2128 u64 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts));
2129
2130 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) {
2131 /* tur_ms_to_ready timer extinguished */
2132 atomic_set(&devip->stopped, 0);
2133 stopped_state = 0;
2134 }
2135 }
2136 if (stopped_state == 2) {
2137 if (want_stop) {
2138 stopped_state = 1; /* dummy up success */
2139 } else { /* Disallow tur_ms_to_ready delay to be overridden */
2140 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 0 /* START bit */);
2141 return check_condition_result;
2142 }
2143 }
2144 }
2145 changing = (stopped_state != want_stop);
2146 if (changing)
2147 atomic_xchg(&devip->stopped, want_stop);
2148 if (!changing || (cmd[1] & 0x1)) /* state unchanged or IMMED bit set in cdb */
2149 return SDEG_RES_IMMED_MASK;
2150 else
2151 return 0;
2152}
2153
2154static sector_t get_sdebug_capacity(void)
2155{
2156 static const unsigned int gibibyte = 1073741824;
2157
2158 if (sdebug_virtual_gb > 0)
2159 return (sector_t)sdebug_virtual_gb *
2160 (gibibyte / sdebug_sector_size);
2161 else
2162 return sdebug_store_sectors;
2163}
2164
2165#define SDEBUG_READCAP_ARR_SZ 8
2166static int resp_readcap(struct scsi_cmnd *scp,
2167 struct sdebug_dev_info *devip)
2168{
2169 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
2170 unsigned int capac;
2171
2172 /* following just in case virtual_gb changed */
2173 sdebug_capacity = get_sdebug_capacity();
2174 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
2175 if (sdebug_capacity < 0xffffffff) {
2176 capac = (unsigned int)sdebug_capacity - 1;
2177 put_unaligned_be32(capac, arr + 0);
2178 } else
2179 put_unaligned_be32(0xffffffff, arr + 0);
2180 put_unaligned_be16(sdebug_sector_size, arr + 6);
2181 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
2182}
2183
2184#define SDEBUG_READCAP16_ARR_SZ 32
2185static int resp_readcap16(struct scsi_cmnd *scp,
2186 struct sdebug_dev_info *devip)
2187{
2188 unsigned char *cmd = scp->cmnd;
2189 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
2190 u32 alloc_len;
2191
2192 alloc_len = get_unaligned_be32(cmd + 10);
2193 /* following just in case virtual_gb changed */
2194 sdebug_capacity = get_sdebug_capacity();
2195 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
2196 put_unaligned_be64((u64)(sdebug_capacity - 1), arr + 0);
2197 put_unaligned_be32(sdebug_sector_size, arr + 8);
2198 arr[13] = sdebug_physblk_exp & 0xf;
2199 arr[14] = (sdebug_lowest_aligned >> 8) & 0x3f;
2200
2201 if (scsi_debug_lbp()) {
2202 arr[14] |= 0x80; /* LBPME */
2203 /* from sbc4r07, this LBPRZ field is 1 bit, but the LBPRZ in
2204 * the LB Provisioning VPD page is 3 bits. Note that lbprz=2
2205 * in the wider field maps to 0 in this field.
2206 */
2207 if (sdebug_lbprz & 1) /* precisely what the draft requires */
2208 arr[14] |= 0x40;
2209 }
2210
2211 /*
2212 * Since the scsi_debug READ CAPACITY implementation always reports the
2213 * total disk capacity, set RC BASIS = 1 for host-managed ZBC devices.
2214 */
2215 if (devip->zoned)
2216 arr[12] |= 1 << 4;
2217
2218 arr[15] = sdebug_lowest_aligned & 0xff;
2219
2220 if (have_dif_prot) {
2221 arr[12] = (sdebug_dif - 1) << 1; /* P_TYPE */
2222 arr[12] |= 1; /* PROT_EN */
2223 }
2224
2225 return fill_from_dev_buffer(scp, arr,
2226 min_t(u32, alloc_len, SDEBUG_READCAP16_ARR_SZ));
2227}
2228
2229#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
2230
2231static int resp_report_tgtpgs(struct scsi_cmnd *scp,
2232 struct sdebug_dev_info *devip)
2233{
2234 unsigned char *cmd = scp->cmnd;
2235 unsigned char *arr;
2236 int host_no = devip->sdbg_host->shost->host_no;
2237 int port_group_a, port_group_b, port_a, port_b;
2238 u32 alen, n, rlen;
2239 int ret;
2240
2241 alen = get_unaligned_be32(cmd + 6);
2242 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
2243 if (! arr)
2244 return DID_REQUEUE << 16;
2245 /*
2246 * EVPD page 0x88 states we have two ports, one
2247 * real and a fake port with no device connected.
2248 * So we create two port groups with one port each
2249 * and set the group with port B to unavailable.
2250 */
2251 port_a = 0x1; /* relative port A */
2252 port_b = 0x2; /* relative port B */
2253 port_group_a = (((host_no + 1) & 0x7f) << 8) +
2254 (devip->channel & 0x7f);
2255 port_group_b = (((host_no + 1) & 0x7f) << 8) +
2256 (devip->channel & 0x7f) + 0x80;
2257
2258 /*
2259 * The asymmetric access state is cycled according to the host_id.
2260 */
2261 n = 4;
2262 if (sdebug_vpd_use_hostno == 0) {
2263 arr[n++] = host_no % 3; /* Asymm access state */
2264 arr[n++] = 0x0F; /* claim: all states are supported */
2265 } else {
2266 arr[n++] = 0x0; /* Active/Optimized path */
2267 arr[n++] = 0x01; /* only support active/optimized paths */
2268 }
2269 put_unaligned_be16(port_group_a, arr + n);
2270 n += 2;
2271 arr[n++] = 0; /* Reserved */
2272 arr[n++] = 0; /* Status code */
2273 arr[n++] = 0; /* Vendor unique */
2274 arr[n++] = 0x1; /* One port per group */
2275 arr[n++] = 0; /* Reserved */
2276 arr[n++] = 0; /* Reserved */
2277 put_unaligned_be16(port_a, arr + n);
2278 n += 2;
2279 arr[n++] = 3; /* Port unavailable */
2280 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
2281 put_unaligned_be16(port_group_b, arr + n);
2282 n += 2;
2283 arr[n++] = 0; /* Reserved */
2284 arr[n++] = 0; /* Status code */
2285 arr[n++] = 0; /* Vendor unique */
2286 arr[n++] = 0x1; /* One port per group */
2287 arr[n++] = 0; /* Reserved */
2288 arr[n++] = 0; /* Reserved */
2289 put_unaligned_be16(port_b, arr + n);
2290 n += 2;
2291
2292 rlen = n - 4;
2293 put_unaligned_be32(rlen, arr + 0);
2294
2295 /*
2296 * Return the smallest value of either
2297 * - The allocated length
2298 * - The constructed command length
2299 * - The maximum array size
2300 */
2301 rlen = min(alen, n);
2302 ret = fill_from_dev_buffer(scp, arr,
2303 min_t(u32, rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
2304 kfree(arr);
2305 return ret;
2306}
2307
2308static int resp_rsup_opcodes(struct scsi_cmnd *scp,
2309 struct sdebug_dev_info *devip)
2310{
2311 bool rctd;
2312 u8 reporting_opts, req_opcode, sdeb_i, supp;
2313 u16 req_sa, u;
2314 u32 alloc_len, a_len;
2315 int k, offset, len, errsts, count, bump, na;
2316 const struct opcode_info_t *oip;
2317 const struct opcode_info_t *r_oip;
2318 u8 *arr;
2319 u8 *cmd = scp->cmnd;
2320
2321 rctd = !!(cmd[2] & 0x80);
2322 reporting_opts = cmd[2] & 0x7;
2323 req_opcode = cmd[3];
2324 req_sa = get_unaligned_be16(cmd + 4);
2325 alloc_len = get_unaligned_be32(cmd + 6);
2326 if (alloc_len < 4 || alloc_len > 0xffff) {
2327 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
2328 return check_condition_result;
2329 }
2330 if (alloc_len > 8192)
2331 a_len = 8192;
2332 else
2333 a_len = alloc_len;
2334 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC);
2335 if (NULL == arr) {
2336 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
2337 INSUFF_RES_ASCQ);
2338 return check_condition_result;
2339 }
2340 switch (reporting_opts) {
2341 case 0: /* all commands */
2342 /* count number of commands */
2343 for (count = 0, oip = opcode_info_arr;
2344 oip->num_attached != 0xff; ++oip) {
2345 if (F_INV_OP & oip->flags)
2346 continue;
2347 count += (oip->num_attached + 1);
2348 }
2349 bump = rctd ? 20 : 8;
2350 put_unaligned_be32(count * bump, arr);
2351 for (offset = 4, oip = opcode_info_arr;
2352 oip->num_attached != 0xff && offset < a_len; ++oip) {
2353 if (F_INV_OP & oip->flags)
2354 continue;
2355 na = oip->num_attached;
2356 arr[offset] = oip->opcode;
2357 put_unaligned_be16(oip->sa, arr + offset + 2);
2358 if (rctd)
2359 arr[offset + 5] |= 0x2;
2360 if (FF_SA & oip->flags)
2361 arr[offset + 5] |= 0x1;
2362 put_unaligned_be16(oip->len_mask[0], arr + offset + 6);
2363 if (rctd)
2364 put_unaligned_be16(0xa, arr + offset + 8);
2365 r_oip = oip;
2366 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) {
2367 if (F_INV_OP & oip->flags)
2368 continue;
2369 offset += bump;
2370 arr[offset] = oip->opcode;
2371 put_unaligned_be16(oip->sa, arr + offset + 2);
2372 if (rctd)
2373 arr[offset + 5] |= 0x2;
2374 if (FF_SA & oip->flags)
2375 arr[offset + 5] |= 0x1;
2376 put_unaligned_be16(oip->len_mask[0],
2377 arr + offset + 6);
2378 if (rctd)
2379 put_unaligned_be16(0xa,
2380 arr + offset + 8);
2381 }
2382 oip = r_oip;
2383 offset += bump;
2384 }
2385 break;
2386 case 1: /* one command: opcode only */
2387 case 2: /* one command: opcode plus service action */
2388 case 3: /* one command: if sa==0 then opcode only else opcode+sa */
2389 sdeb_i = opcode_ind_arr[req_opcode];
2390 oip = &opcode_info_arr[sdeb_i];
2391 if (F_INV_OP & oip->flags) {
2392 supp = 1;
2393 offset = 4;
2394 } else {
2395 if (1 == reporting_opts) {
2396 if (FF_SA & oip->flags) {
2397 mk_sense_invalid_fld(scp, SDEB_IN_CDB,
2398 2, 2);
2399 kfree(arr);
2400 return check_condition_result;
2401 }
2402 req_sa = 0;
2403 } else if (2 == reporting_opts &&
2404 0 == (FF_SA & oip->flags)) {
2405 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
2406 kfree(arr); /* point at requested sa */
2407 return check_condition_result;
2408 }
2409 if (0 == (FF_SA & oip->flags) &&
2410 req_opcode == oip->opcode)
2411 supp = 3;
2412 else if (0 == (FF_SA & oip->flags)) {
2413 na = oip->num_attached;
2414 for (k = 0, oip = oip->arrp; k < na;
2415 ++k, ++oip) {
2416 if (req_opcode == oip->opcode)
2417 break;
2418 }
2419 supp = (k >= na) ? 1 : 3;
2420 } else if (req_sa != oip->sa) {
2421 na = oip->num_attached;
2422 for (k = 0, oip = oip->arrp; k < na;
2423 ++k, ++oip) {
2424 if (req_sa == oip->sa)
2425 break;
2426 }
2427 supp = (k >= na) ? 1 : 3;
2428 } else
2429 supp = 3;
2430 if (3 == supp) {
2431 u = oip->len_mask[0];
2432 put_unaligned_be16(u, arr + 2);
2433 arr[4] = oip->opcode;
2434 for (k = 1; k < u; ++k)
2435 arr[4 + k] = (k < 16) ?
2436 oip->len_mask[k] : 0xff;
2437 offset = 4 + u;
2438 } else
2439 offset = 4;
2440 }
2441 arr[1] = (rctd ? 0x80 : 0) | supp;
2442 if (rctd) {
2443 put_unaligned_be16(0xa, arr + offset);
2444 offset += 12;
2445 }
2446 break;
2447 default:
2448 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
2449 kfree(arr);
2450 return check_condition_result;
2451 }
2452 offset = (offset < a_len) ? offset : a_len;
2453 len = (offset < alloc_len) ? offset : alloc_len;
2454 errsts = fill_from_dev_buffer(scp, arr, len);
2455 kfree(arr);
2456 return errsts;
2457}
2458
2459static int resp_rsup_tmfs(struct scsi_cmnd *scp,
2460 struct sdebug_dev_info *devip)
2461{
2462 bool repd;
2463 u32 alloc_len, len;
2464 u8 arr[16];
2465 u8 *cmd = scp->cmnd;
2466
2467 memset(arr, 0, sizeof(arr));
2468 repd = !!(cmd[2] & 0x80);
2469 alloc_len = get_unaligned_be32(cmd + 6);
2470 if (alloc_len < 4) {
2471 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
2472 return check_condition_result;
2473 }
2474 arr[0] = 0xc8; /* ATS | ATSS | LURS */
2475 arr[1] = 0x1; /* ITNRS */
2476 if (repd) {
2477 arr[3] = 0xc;
2478 len = 16;
2479 } else
2480 len = 4;
2481
2482 len = (len < alloc_len) ? len : alloc_len;
2483 return fill_from_dev_buffer(scp, arr, len);
2484}
2485
2486/* <<Following mode page info copied from ST318451LW>> */
2487
2488static int resp_err_recov_pg(unsigned char *p, int pcontrol, int target)
2489{ /* Read-Write Error Recovery page for mode_sense */
2490 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
2491 5, 0, 0xff, 0xff};
2492
2493 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
2494 if (1 == pcontrol)
2495 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
2496 return sizeof(err_recov_pg);
2497}
2498
2499static int resp_disconnect_pg(unsigned char *p, int pcontrol, int target)
2500{ /* Disconnect-Reconnect page for mode_sense */
2501 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
2502 0, 0, 0, 0, 0, 0, 0, 0};
2503
2504 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
2505 if (1 == pcontrol)
2506 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
2507 return sizeof(disconnect_pg);
2508}
2509
2510static int resp_format_pg(unsigned char *p, int pcontrol, int target)
2511{ /* Format device page for mode_sense */
2512 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
2513 0, 0, 0, 0, 0, 0, 0, 0,
2514 0, 0, 0, 0, 0x40, 0, 0, 0};
2515
2516 memcpy(p, format_pg, sizeof(format_pg));
2517 put_unaligned_be16(sdebug_sectors_per, p + 10);
2518 put_unaligned_be16(sdebug_sector_size, p + 12);
2519 if (sdebug_removable)
2520 p[20] |= 0x20; /* should agree with INQUIRY */
2521 if (1 == pcontrol)
2522 memset(p + 2, 0, sizeof(format_pg) - 2);
2523 return sizeof(format_pg);
2524}
2525
2526static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
2527 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
2528 0, 0, 0, 0};
2529
2530static int resp_caching_pg(unsigned char *p, int pcontrol, int target)
2531{ /* Caching page for mode_sense */
2532 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
2533 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
2534 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
2535 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
2536
2537 if (SDEBUG_OPT_N_WCE & sdebug_opts)
2538 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
2539 memcpy(p, caching_pg, sizeof(caching_pg));
2540 if (1 == pcontrol)
2541 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
2542 else if (2 == pcontrol)
2543 memcpy(p, d_caching_pg, sizeof(d_caching_pg));
2544 return sizeof(caching_pg);
2545}
2546
2547static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
2548 0, 0, 0x2, 0x4b};
2549
2550static int resp_ctrl_m_pg(unsigned char *p, int pcontrol, int target)
2551{ /* Control mode page for mode_sense */
2552 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
2553 0, 0, 0, 0};
2554 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
2555 0, 0, 0x2, 0x4b};
2556
2557 if (sdebug_dsense)
2558 ctrl_m_pg[2] |= 0x4;
2559 else
2560 ctrl_m_pg[2] &= ~0x4;
2561
2562 if (sdebug_ato)
2563 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
2564
2565 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
2566 if (1 == pcontrol)
2567 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
2568 else if (2 == pcontrol)
2569 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
2570 return sizeof(ctrl_m_pg);
2571}
2572
2573/* IO Advice Hints Grouping mode page */
2574static int resp_grouping_m_pg(unsigned char *p, int pcontrol, int target)
2575{
2576 /* IO Advice Hints Grouping mode page */
2577 struct grouping_m_pg {
2578 u8 page_code; /* OR 0x40 when subpage_code > 0 */
2579 u8 subpage_code;
2580 __be16 page_length;
2581 u8 reserved[12];
2582 struct scsi_io_group_descriptor descr[MAXIMUM_NUMBER_OF_STREAMS];
2583 };
2584 static const struct grouping_m_pg gr_m_pg = {
2585 .page_code = 0xa | 0x40,
2586 .subpage_code = 5,
2587 .page_length = cpu_to_be16(sizeof(gr_m_pg) - 4),
2588 .descr = {
2589 { .st_enble = 1 },
2590 { .st_enble = 1 },
2591 { .st_enble = 1 },
2592 { .st_enble = 1 },
2593 { .st_enble = 1 },
2594 { .st_enble = 0 },
2595 }
2596 };
2597
2598 BUILD_BUG_ON(sizeof(struct grouping_m_pg) !=
2599 16 + MAXIMUM_NUMBER_OF_STREAMS * 16);
2600 memcpy(p, &gr_m_pg, sizeof(gr_m_pg));
2601 if (1 == pcontrol) {
2602 /* There are no changeable values so clear from byte 4 on. */
2603 memset(p + 4, 0, sizeof(gr_m_pg) - 4);
2604 }
2605 return sizeof(gr_m_pg);
2606}
2607
2608static int resp_iec_m_pg(unsigned char *p, int pcontrol, int target)
2609{ /* Informational Exceptions control mode page for mode_sense */
2610 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
2611 0, 0, 0x0, 0x0};
2612 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
2613 0, 0, 0x0, 0x0};
2614
2615 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
2616 if (1 == pcontrol)
2617 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
2618 else if (2 == pcontrol)
2619 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
2620 return sizeof(iec_m_pg);
2621}
2622
2623static int resp_sas_sf_m_pg(unsigned char *p, int pcontrol, int target)
2624{ /* SAS SSP mode page - short format for mode_sense */
2625 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
2626 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
2627
2628 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
2629 if (1 == pcontrol)
2630 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
2631 return sizeof(sas_sf_m_pg);
2632}
2633
2634
2635static int resp_sas_pcd_m_spg(unsigned char *p, int pcontrol, int target,
2636 int target_dev_id)
2637{ /* SAS phy control and discover mode page for mode_sense */
2638 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
2639 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
2640 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2641 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2642 0x2, 0, 0, 0, 0, 0, 0, 0,
2643 0x88, 0x99, 0, 0, 0, 0, 0, 0,
2644 0, 0, 0, 0, 0, 0, 0, 0,
2645 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
2646 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2647 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2648 0x3, 0, 0, 0, 0, 0, 0, 0,
2649 0x88, 0x99, 0, 0, 0, 0, 0, 0,
2650 0, 0, 0, 0, 0, 0, 0, 0,
2651 };
2652 int port_a, port_b;
2653
2654 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 16);
2655 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 24);
2656 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 64);
2657 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 72);
2658 port_a = target_dev_id + 1;
2659 port_b = port_a + 1;
2660 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
2661 put_unaligned_be32(port_a, p + 20);
2662 put_unaligned_be32(port_b, p + 48 + 20);
2663 if (1 == pcontrol)
2664 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
2665 return sizeof(sas_pcd_m_pg);
2666}
2667
2668static int resp_sas_sha_m_spg(unsigned char *p, int pcontrol)
2669{ /* SAS SSP shared protocol specific port mode subpage */
2670 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
2671 0, 0, 0, 0, 0, 0, 0, 0,
2672 };
2673
2674 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
2675 if (1 == pcontrol)
2676 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
2677 return sizeof(sas_sha_m_pg);
2678}
2679
2680/* PAGE_SIZE is more than necessary but provides room for future expansion. */
2681#define SDEBUG_MAX_MSENSE_SZ PAGE_SIZE
2682
2683static int resp_mode_sense(struct scsi_cmnd *scp,
2684 struct sdebug_dev_info *devip)
2685{
2686 int pcontrol, pcode, subpcode, bd_len;
2687 unsigned char dev_spec;
2688 u32 alloc_len, offset, len;
2689 int target_dev_id;
2690 int target = scp->device->id;
2691 unsigned char *ap;
2692 unsigned char *arr __free(kfree);
2693 unsigned char *cmd = scp->cmnd;
2694 bool dbd, llbaa, msense_6, is_disk, is_zbc;
2695
2696 arr = kzalloc(SDEBUG_MAX_MSENSE_SZ, GFP_ATOMIC);
2697 if (!arr)
2698 return -ENOMEM;
2699 dbd = !!(cmd[1] & 0x8); /* disable block descriptors */
2700 pcontrol = (cmd[2] & 0xc0) >> 6;
2701 pcode = cmd[2] & 0x3f;
2702 subpcode = cmd[3];
2703 msense_6 = (MODE_SENSE == cmd[0]);
2704 llbaa = msense_6 ? false : !!(cmd[1] & 0x10);
2705 is_disk = (sdebug_ptype == TYPE_DISK);
2706 is_zbc = devip->zoned;
2707 if ((is_disk || is_zbc) && !dbd)
2708 bd_len = llbaa ? 16 : 8;
2709 else
2710 bd_len = 0;
2711 alloc_len = msense_6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2712 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
2713 if (0x3 == pcontrol) { /* Saving values not supported */
2714 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
2715 return check_condition_result;
2716 }
2717 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
2718 (devip->target * 1000) - 3;
2719 /* for disks+zbc set DPOFUA bit and clear write protect (WP) bit */
2720 if (is_disk || is_zbc) {
2721 dev_spec = 0x10; /* =0x90 if WP=1 implies read-only */
2722 if (sdebug_wp)
2723 dev_spec |= 0x80;
2724 } else
2725 dev_spec = 0x0;
2726 if (msense_6) {
2727 arr[2] = dev_spec;
2728 arr[3] = bd_len;
2729 offset = 4;
2730 } else {
2731 arr[3] = dev_spec;
2732 if (16 == bd_len)
2733 arr[4] = 0x1; /* set LONGLBA bit */
2734 arr[7] = bd_len; /* assume 255 or less */
2735 offset = 8;
2736 }
2737 ap = arr + offset;
2738 if ((bd_len > 0) && (!sdebug_capacity))
2739 sdebug_capacity = get_sdebug_capacity();
2740
2741 if (8 == bd_len) {
2742 if (sdebug_capacity > 0xfffffffe)
2743 put_unaligned_be32(0xffffffff, ap + 0);
2744 else
2745 put_unaligned_be32(sdebug_capacity, ap + 0);
2746 put_unaligned_be16(sdebug_sector_size, ap + 6);
2747 offset += bd_len;
2748 ap = arr + offset;
2749 } else if (16 == bd_len) {
2750 put_unaligned_be64((u64)sdebug_capacity, ap + 0);
2751 put_unaligned_be32(sdebug_sector_size, ap + 12);
2752 offset += bd_len;
2753 ap = arr + offset;
2754 }
2755
2756 /*
2757 * N.B. If len>0 before resp_*_pg() call, then form of that call should be:
2758 * len += resp_*_pg(ap + len, pcontrol, target);
2759 */
2760 switch (pcode) {
2761 case 0x1: /* Read-Write error recovery page, direct access */
2762 if (subpcode > 0x0 && subpcode < 0xff)
2763 goto bad_subpcode;
2764 len = resp_err_recov_pg(ap, pcontrol, target);
2765 offset += len;
2766 break;
2767 case 0x2: /* Disconnect-Reconnect page, all devices */
2768 if (subpcode > 0x0 && subpcode < 0xff)
2769 goto bad_subpcode;
2770 len = resp_disconnect_pg(ap, pcontrol, target);
2771 offset += len;
2772 break;
2773 case 0x3: /* Format device page, direct access */
2774 if (subpcode > 0x0 && subpcode < 0xff)
2775 goto bad_subpcode;
2776 if (is_disk) {
2777 len = resp_format_pg(ap, pcontrol, target);
2778 offset += len;
2779 } else {
2780 goto bad_pcode;
2781 }
2782 break;
2783 case 0x8: /* Caching page, direct access */
2784 if (subpcode > 0x0 && subpcode < 0xff)
2785 goto bad_subpcode;
2786 if (is_disk || is_zbc) {
2787 len = resp_caching_pg(ap, pcontrol, target);
2788 offset += len;
2789 } else {
2790 goto bad_pcode;
2791 }
2792 break;
2793 case 0xa: /* Control Mode page, all devices */
2794 switch (subpcode) {
2795 case 0:
2796 len = resp_ctrl_m_pg(ap, pcontrol, target);
2797 break;
2798 case 0x05:
2799 len = resp_grouping_m_pg(ap, pcontrol, target);
2800 break;
2801 case 0xff:
2802 len = resp_ctrl_m_pg(ap, pcontrol, target);
2803 len += resp_grouping_m_pg(ap + len, pcontrol, target);
2804 break;
2805 default:
2806 goto bad_subpcode;
2807 }
2808 offset += len;
2809 break;
2810 case 0x19: /* if spc==1 then sas phy, control+discover */
2811 if (subpcode > 0x2 && subpcode < 0xff)
2812 goto bad_subpcode;
2813 len = 0;
2814 if ((0x0 == subpcode) || (0xff == subpcode))
2815 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2816 if ((0x1 == subpcode) || (0xff == subpcode))
2817 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
2818 target_dev_id);
2819 if ((0x2 == subpcode) || (0xff == subpcode))
2820 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2821 offset += len;
2822 break;
2823 case 0x1c: /* Informational Exceptions Mode page, all devices */
2824 if (subpcode > 0x0 && subpcode < 0xff)
2825 goto bad_subpcode;
2826 len = resp_iec_m_pg(ap, pcontrol, target);
2827 offset += len;
2828 break;
2829 case 0x3f: /* Read all Mode pages */
2830 if (subpcode > 0x0 && subpcode < 0xff)
2831 goto bad_subpcode;
2832 len = resp_err_recov_pg(ap, pcontrol, target);
2833 len += resp_disconnect_pg(ap + len, pcontrol, target);
2834 if (is_disk) {
2835 len += resp_format_pg(ap + len, pcontrol, target);
2836 len += resp_caching_pg(ap + len, pcontrol, target);
2837 } else if (is_zbc) {
2838 len += resp_caching_pg(ap + len, pcontrol, target);
2839 }
2840 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
2841 if (0xff == subpcode)
2842 len += resp_grouping_m_pg(ap + len, pcontrol, target);
2843 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2844 if (0xff == subpcode) {
2845 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
2846 target_dev_id);
2847 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2848 }
2849 len += resp_iec_m_pg(ap + len, pcontrol, target);
2850 offset += len;
2851 break;
2852 default:
2853 goto bad_pcode;
2854 }
2855 if (msense_6)
2856 arr[0] = offset - 1;
2857 else
2858 put_unaligned_be16((offset - 2), arr + 0);
2859 return fill_from_dev_buffer(scp, arr, min_t(u32, alloc_len, offset));
2860
2861bad_pcode:
2862 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2863 return check_condition_result;
2864
2865bad_subpcode:
2866 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2867 return check_condition_result;
2868}
2869
2870#define SDEBUG_MAX_MSELECT_SZ 512
2871
2872static int resp_mode_select(struct scsi_cmnd *scp,
2873 struct sdebug_dev_info *devip)
2874{
2875 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
2876 int param_len, res, mpage;
2877 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
2878 unsigned char *cmd = scp->cmnd;
2879 int mselect6 = (MODE_SELECT == cmd[0]);
2880
2881 memset(arr, 0, sizeof(arr));
2882 pf = cmd[1] & 0x10;
2883 sp = cmd[1] & 0x1;
2884 param_len = mselect6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2885 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
2886 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1);
2887 return check_condition_result;
2888 }
2889 res = fetch_to_dev_buffer(scp, arr, param_len);
2890 if (-1 == res)
2891 return DID_ERROR << 16;
2892 else if (sdebug_verbose && (res < param_len))
2893 sdev_printk(KERN_INFO, scp->device,
2894 "%s: cdb indicated=%d, IO sent=%d bytes\n",
2895 __func__, param_len, res);
2896 md_len = mselect6 ? (arr[0] + 1) : (get_unaligned_be16(arr + 0) + 2);
2897 bd_len = mselect6 ? arr[3] : get_unaligned_be16(arr + 6);
2898 off = bd_len + (mselect6 ? 4 : 8);
2899 if (md_len > 2 || off >= res) {
2900 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1);
2901 return check_condition_result;
2902 }
2903 mpage = arr[off] & 0x3f;
2904 ps = !!(arr[off] & 0x80);
2905 if (ps) {
2906 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7);
2907 return check_condition_result;
2908 }
2909 spf = !!(arr[off] & 0x40);
2910 pg_len = spf ? (get_unaligned_be16(arr + off + 2) + 4) :
2911 (arr[off + 1] + 2);
2912 if ((pg_len + off) > param_len) {
2913 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2914 PARAMETER_LIST_LENGTH_ERR, 0);
2915 return check_condition_result;
2916 }
2917 switch (mpage) {
2918 case 0x8: /* Caching Mode page */
2919 if (caching_pg[1] == arr[off + 1]) {
2920 memcpy(caching_pg + 2, arr + off + 2,
2921 sizeof(caching_pg) - 2);
2922 goto set_mode_changed_ua;
2923 }
2924 break;
2925 case 0xa: /* Control Mode page */
2926 if (ctrl_m_pg[1] == arr[off + 1]) {
2927 memcpy(ctrl_m_pg + 2, arr + off + 2,
2928 sizeof(ctrl_m_pg) - 2);
2929 if (ctrl_m_pg[4] & 0x8)
2930 sdebug_wp = true;
2931 else
2932 sdebug_wp = false;
2933 sdebug_dsense = !!(ctrl_m_pg[2] & 0x4);
2934 goto set_mode_changed_ua;
2935 }
2936 break;
2937 case 0x1c: /* Informational Exceptions Mode page */
2938 if (iec_m_pg[1] == arr[off + 1]) {
2939 memcpy(iec_m_pg + 2, arr + off + 2,
2940 sizeof(iec_m_pg) - 2);
2941 goto set_mode_changed_ua;
2942 }
2943 break;
2944 default:
2945 break;
2946 }
2947 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5);
2948 return check_condition_result;
2949set_mode_changed_ua:
2950 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
2951 return 0;
2952}
2953
2954static int resp_temp_l_pg(unsigned char *arr)
2955{
2956 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
2957 0x0, 0x1, 0x3, 0x2, 0x0, 65,
2958 };
2959
2960 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
2961 return sizeof(temp_l_pg);
2962}
2963
2964static int resp_ie_l_pg(unsigned char *arr)
2965{
2966 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
2967 };
2968
2969 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
2970 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
2971 arr[4] = THRESHOLD_EXCEEDED;
2972 arr[5] = 0xff;
2973 }
2974 return sizeof(ie_l_pg);
2975}
2976
2977static int resp_env_rep_l_spg(unsigned char *arr)
2978{
2979 unsigned char env_rep_l_spg[] = {0x0, 0x0, 0x23, 0x8,
2980 0x0, 40, 72, 0xff, 45, 18, 0, 0,
2981 0x1, 0x0, 0x23, 0x8,
2982 0x0, 55, 72, 35, 55, 45, 0, 0,
2983 };
2984
2985 memcpy(arr, env_rep_l_spg, sizeof(env_rep_l_spg));
2986 return sizeof(env_rep_l_spg);
2987}
2988
2989#define SDEBUG_MAX_LSENSE_SZ 512
2990
2991static int resp_log_sense(struct scsi_cmnd *scp,
2992 struct sdebug_dev_info *devip)
2993{
2994 int ppc, sp, pcode, subpcode;
2995 u32 alloc_len, len, n;
2996 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
2997 unsigned char *cmd = scp->cmnd;
2998
2999 memset(arr, 0, sizeof(arr));
3000 ppc = cmd[1] & 0x2;
3001 sp = cmd[1] & 0x1;
3002 if (ppc || sp) {
3003 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0);
3004 return check_condition_result;
3005 }
3006 pcode = cmd[2] & 0x3f;
3007 subpcode = cmd[3] & 0xff;
3008 alloc_len = get_unaligned_be16(cmd + 7);
3009 arr[0] = pcode;
3010 if (0 == subpcode) {
3011 switch (pcode) {
3012 case 0x0: /* Supported log pages log page */
3013 n = 4;
3014 arr[n++] = 0x0; /* this page */
3015 arr[n++] = 0xd; /* Temperature */
3016 arr[n++] = 0x2f; /* Informational exceptions */
3017 arr[3] = n - 4;
3018 break;
3019 case 0xd: /* Temperature log page */
3020 arr[3] = resp_temp_l_pg(arr + 4);
3021 break;
3022 case 0x2f: /* Informational exceptions log page */
3023 arr[3] = resp_ie_l_pg(arr + 4);
3024 break;
3025 default:
3026 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
3027 return check_condition_result;
3028 }
3029 } else if (0xff == subpcode) {
3030 arr[0] |= 0x40;
3031 arr[1] = subpcode;
3032 switch (pcode) {
3033 case 0x0: /* Supported log pages and subpages log page */
3034 n = 4;
3035 arr[n++] = 0x0;
3036 arr[n++] = 0x0; /* 0,0 page */
3037 arr[n++] = 0x0;
3038 arr[n++] = 0xff; /* this page */
3039 arr[n++] = 0xd;
3040 arr[n++] = 0x0; /* Temperature */
3041 arr[n++] = 0xd;
3042 arr[n++] = 0x1; /* Environment reporting */
3043 arr[n++] = 0xd;
3044 arr[n++] = 0xff; /* all 0xd subpages */
3045 arr[n++] = 0x2f;
3046 arr[n++] = 0x0; /* Informational exceptions */
3047 arr[n++] = 0x2f;
3048 arr[n++] = 0xff; /* all 0x2f subpages */
3049 arr[3] = n - 4;
3050 break;
3051 case 0xd: /* Temperature subpages */
3052 n = 4;
3053 arr[n++] = 0xd;
3054 arr[n++] = 0x0; /* Temperature */
3055 arr[n++] = 0xd;
3056 arr[n++] = 0x1; /* Environment reporting */
3057 arr[n++] = 0xd;
3058 arr[n++] = 0xff; /* these subpages */
3059 arr[3] = n - 4;
3060 break;
3061 case 0x2f: /* Informational exceptions subpages */
3062 n = 4;
3063 arr[n++] = 0x2f;
3064 arr[n++] = 0x0; /* Informational exceptions */
3065 arr[n++] = 0x2f;
3066 arr[n++] = 0xff; /* these subpages */
3067 arr[3] = n - 4;
3068 break;
3069 default:
3070 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
3071 return check_condition_result;
3072 }
3073 } else if (subpcode > 0) {
3074 arr[0] |= 0x40;
3075 arr[1] = subpcode;
3076 if (pcode == 0xd && subpcode == 1)
3077 arr[3] = resp_env_rep_l_spg(arr + 4);
3078 else {
3079 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
3080 return check_condition_result;
3081 }
3082 } else {
3083 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
3084 return check_condition_result;
3085 }
3086 len = min_t(u32, get_unaligned_be16(arr + 2) + 4, alloc_len);
3087 return fill_from_dev_buffer(scp, arr,
3088 min_t(u32, len, SDEBUG_MAX_INQ_ARR_SZ));
3089}
3090
3091static inline bool sdebug_dev_is_zoned(struct sdebug_dev_info *devip)
3092{
3093 return devip->nr_zones != 0;
3094}
3095
3096static struct sdeb_zone_state *zbc_zone(struct sdebug_dev_info *devip,
3097 unsigned long long lba)
3098{
3099 u32 zno = lba >> devip->zsize_shift;
3100 struct sdeb_zone_state *zsp;
3101
3102 if (devip->zcap == devip->zsize || zno < devip->nr_conv_zones)
3103 return &devip->zstate[zno];
3104
3105 /*
3106 * If the zone capacity is less than the zone size, adjust for gap
3107 * zones.
3108 */
3109 zno = 2 * zno - devip->nr_conv_zones;
3110 WARN_ONCE(zno >= devip->nr_zones, "%u > %u\n", zno, devip->nr_zones);
3111 zsp = &devip->zstate[zno];
3112 if (lba >= zsp->z_start + zsp->z_size)
3113 zsp++;
3114 WARN_ON_ONCE(lba >= zsp->z_start + zsp->z_size);
3115 return zsp;
3116}
3117
3118static inline bool zbc_zone_is_conv(struct sdeb_zone_state *zsp)
3119{
3120 return zsp->z_type == ZBC_ZTYPE_CNV;
3121}
3122
3123static inline bool zbc_zone_is_gap(struct sdeb_zone_state *zsp)
3124{
3125 return zsp->z_type == ZBC_ZTYPE_GAP;
3126}
3127
3128static inline bool zbc_zone_is_seq(struct sdeb_zone_state *zsp)
3129{
3130 return !zbc_zone_is_conv(zsp) && !zbc_zone_is_gap(zsp);
3131}
3132
3133static void zbc_close_zone(struct sdebug_dev_info *devip,
3134 struct sdeb_zone_state *zsp)
3135{
3136 enum sdebug_z_cond zc;
3137
3138 if (!zbc_zone_is_seq(zsp))
3139 return;
3140
3141 zc = zsp->z_cond;
3142 if (!(zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN))
3143 return;
3144
3145 if (zc == ZC2_IMPLICIT_OPEN)
3146 devip->nr_imp_open--;
3147 else
3148 devip->nr_exp_open--;
3149
3150 if (zsp->z_wp == zsp->z_start) {
3151 zsp->z_cond = ZC1_EMPTY;
3152 } else {
3153 zsp->z_cond = ZC4_CLOSED;
3154 devip->nr_closed++;
3155 }
3156}
3157
3158static void zbc_close_imp_open_zone(struct sdebug_dev_info *devip)
3159{
3160 struct sdeb_zone_state *zsp = &devip->zstate[0];
3161 unsigned int i;
3162
3163 for (i = 0; i < devip->nr_zones; i++, zsp++) {
3164 if (zsp->z_cond == ZC2_IMPLICIT_OPEN) {
3165 zbc_close_zone(devip, zsp);
3166 return;
3167 }
3168 }
3169}
3170
3171static void zbc_open_zone(struct sdebug_dev_info *devip,
3172 struct sdeb_zone_state *zsp, bool explicit)
3173{
3174 enum sdebug_z_cond zc;
3175
3176 if (!zbc_zone_is_seq(zsp))
3177 return;
3178
3179 zc = zsp->z_cond;
3180 if ((explicit && zc == ZC3_EXPLICIT_OPEN) ||
3181 (!explicit && zc == ZC2_IMPLICIT_OPEN))
3182 return;
3183
3184 /* Close an implicit open zone if necessary */
3185 if (explicit && zsp->z_cond == ZC2_IMPLICIT_OPEN)
3186 zbc_close_zone(devip, zsp);
3187 else if (devip->max_open &&
3188 devip->nr_imp_open + devip->nr_exp_open >= devip->max_open)
3189 zbc_close_imp_open_zone(devip);
3190
3191 if (zsp->z_cond == ZC4_CLOSED)
3192 devip->nr_closed--;
3193 if (explicit) {
3194 zsp->z_cond = ZC3_EXPLICIT_OPEN;
3195 devip->nr_exp_open++;
3196 } else {
3197 zsp->z_cond = ZC2_IMPLICIT_OPEN;
3198 devip->nr_imp_open++;
3199 }
3200}
3201
3202static inline void zbc_set_zone_full(struct sdebug_dev_info *devip,
3203 struct sdeb_zone_state *zsp)
3204{
3205 switch (zsp->z_cond) {
3206 case ZC2_IMPLICIT_OPEN:
3207 devip->nr_imp_open--;
3208 break;
3209 case ZC3_EXPLICIT_OPEN:
3210 devip->nr_exp_open--;
3211 break;
3212 default:
3213 WARN_ONCE(true, "Invalid zone %llu condition %x\n",
3214 zsp->z_start, zsp->z_cond);
3215 break;
3216 }
3217 zsp->z_cond = ZC5_FULL;
3218}
3219
3220static void zbc_inc_wp(struct sdebug_dev_info *devip,
3221 unsigned long long lba, unsigned int num)
3222{
3223 struct sdeb_zone_state *zsp = zbc_zone(devip, lba);
3224 unsigned long long n, end, zend = zsp->z_start + zsp->z_size;
3225
3226 if (!zbc_zone_is_seq(zsp))
3227 return;
3228
3229 if (zsp->z_type == ZBC_ZTYPE_SWR) {
3230 zsp->z_wp += num;
3231 if (zsp->z_wp >= zend)
3232 zbc_set_zone_full(devip, zsp);
3233 return;
3234 }
3235
3236 while (num) {
3237 if (lba != zsp->z_wp)
3238 zsp->z_non_seq_resource = true;
3239
3240 end = lba + num;
3241 if (end >= zend) {
3242 n = zend - lba;
3243 zsp->z_wp = zend;
3244 } else if (end > zsp->z_wp) {
3245 n = num;
3246 zsp->z_wp = end;
3247 } else {
3248 n = num;
3249 }
3250 if (zsp->z_wp >= zend)
3251 zbc_set_zone_full(devip, zsp);
3252
3253 num -= n;
3254 lba += n;
3255 if (num) {
3256 zsp++;
3257 zend = zsp->z_start + zsp->z_size;
3258 }
3259 }
3260}
3261
3262static int check_zbc_access_params(struct scsi_cmnd *scp,
3263 unsigned long long lba, unsigned int num, bool write)
3264{
3265 struct scsi_device *sdp = scp->device;
3266 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
3267 struct sdeb_zone_state *zsp = zbc_zone(devip, lba);
3268 struct sdeb_zone_state *zsp_end = zbc_zone(devip, lba + num - 1);
3269
3270 if (!write) {
3271 /* For host-managed, reads cannot cross zone types boundaries */
3272 if (zsp->z_type != zsp_end->z_type) {
3273 mk_sense_buffer(scp, ILLEGAL_REQUEST,
3274 LBA_OUT_OF_RANGE,
3275 READ_INVDATA_ASCQ);
3276 return check_condition_result;
3277 }
3278 return 0;
3279 }
3280
3281 /* Writing into a gap zone is not allowed */
3282 if (zbc_zone_is_gap(zsp)) {
3283 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE,
3284 ATTEMPT_ACCESS_GAP);
3285 return check_condition_result;
3286 }
3287
3288 /* No restrictions for writes within conventional zones */
3289 if (zbc_zone_is_conv(zsp)) {
3290 if (!zbc_zone_is_conv(zsp_end)) {
3291 mk_sense_buffer(scp, ILLEGAL_REQUEST,
3292 LBA_OUT_OF_RANGE,
3293 WRITE_BOUNDARY_ASCQ);
3294 return check_condition_result;
3295 }
3296 return 0;
3297 }
3298
3299 if (zsp->z_type == ZBC_ZTYPE_SWR) {
3300 /* Writes cannot cross sequential zone boundaries */
3301 if (zsp_end != zsp) {
3302 mk_sense_buffer(scp, ILLEGAL_REQUEST,
3303 LBA_OUT_OF_RANGE,
3304 WRITE_BOUNDARY_ASCQ);
3305 return check_condition_result;
3306 }
3307 /* Cannot write full zones */
3308 if (zsp->z_cond == ZC5_FULL) {
3309 mk_sense_buffer(scp, ILLEGAL_REQUEST,
3310 INVALID_FIELD_IN_CDB, 0);
3311 return check_condition_result;
3312 }
3313 /* Writes must be aligned to the zone WP */
3314 if (lba != zsp->z_wp) {
3315 mk_sense_buffer(scp, ILLEGAL_REQUEST,
3316 LBA_OUT_OF_RANGE,
3317 UNALIGNED_WRITE_ASCQ);
3318 return check_condition_result;
3319 }
3320 }
3321
3322 /* Handle implicit open of closed and empty zones */
3323 if (zsp->z_cond == ZC1_EMPTY || zsp->z_cond == ZC4_CLOSED) {
3324 if (devip->max_open &&
3325 devip->nr_exp_open >= devip->max_open) {
3326 mk_sense_buffer(scp, DATA_PROTECT,
3327 INSUFF_RES_ASC,
3328 INSUFF_ZONE_ASCQ);
3329 return check_condition_result;
3330 }
3331 zbc_open_zone(devip, zsp, false);
3332 }
3333
3334 return 0;
3335}
3336
3337static inline int check_device_access_params
3338 (struct scsi_cmnd *scp, unsigned long long lba,
3339 unsigned int num, bool write)
3340{
3341 struct scsi_device *sdp = scp->device;
3342 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
3343
3344 if (lba + num > sdebug_capacity) {
3345 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
3346 return check_condition_result;
3347 }
3348 /* transfer length excessive (tie in to block limits VPD page) */
3349 if (num > sdebug_store_sectors) {
3350 /* needs work to find which cdb byte 'num' comes from */
3351 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3352 return check_condition_result;
3353 }
3354 if (write && unlikely(sdebug_wp)) {
3355 mk_sense_buffer(scp, DATA_PROTECT, WRITE_PROTECTED, 0x2);
3356 return check_condition_result;
3357 }
3358 if (sdebug_dev_is_zoned(devip))
3359 return check_zbc_access_params(scp, lba, num, write);
3360
3361 return 0;
3362}
3363
3364/*
3365 * Note: if BUG_ON() fires it usually indicates a problem with the parser
3366 * tables. Perhaps a missing F_FAKE_RW or FF_MEDIA_IO flag. Response functions
3367 * that access any of the "stores" in struct sdeb_store_info should call this
3368 * function with bug_if_fake_rw set to true.
3369 */
3370static inline struct sdeb_store_info *devip2sip(struct sdebug_dev_info *devip,
3371 bool bug_if_fake_rw)
3372{
3373 if (sdebug_fake_rw) {
3374 BUG_ON(bug_if_fake_rw); /* See note above */
3375 return NULL;
3376 }
3377 return xa_load(per_store_ap, devip->sdbg_host->si_idx);
3378}
3379
3380/* Returns number of bytes copied or -1 if error. */
3381static int do_device_access(struct sdeb_store_info *sip, struct scsi_cmnd *scp,
3382 u32 sg_skip, u64 lba, u32 num, bool do_write,
3383 u8 group_number)
3384{
3385 int ret;
3386 u64 block, rest = 0;
3387 enum dma_data_direction dir;
3388 struct scsi_data_buffer *sdb = &scp->sdb;
3389 u8 *fsp;
3390
3391 if (do_write) {
3392 dir = DMA_TO_DEVICE;
3393 write_since_sync = true;
3394 } else {
3395 dir = DMA_FROM_DEVICE;
3396 }
3397
3398 if (!sdb->length || !sip)
3399 return 0;
3400 if (scp->sc_data_direction != dir)
3401 return -1;
3402
3403 if (do_write && group_number < ARRAY_SIZE(writes_by_group_number))
3404 atomic_long_inc(&writes_by_group_number[group_number]);
3405
3406 fsp = sip->storep;
3407
3408 block = do_div(lba, sdebug_store_sectors);
3409 if (block + num > sdebug_store_sectors)
3410 rest = block + num - sdebug_store_sectors;
3411
3412 ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
3413 fsp + (block * sdebug_sector_size),
3414 (num - rest) * sdebug_sector_size, sg_skip, do_write);
3415 if (ret != (num - rest) * sdebug_sector_size)
3416 return ret;
3417
3418 if (rest) {
3419 ret += sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
3420 fsp, rest * sdebug_sector_size,
3421 sg_skip + ((num - rest) * sdebug_sector_size),
3422 do_write);
3423 }
3424
3425 return ret;
3426}
3427
3428/* Returns number of bytes copied or -1 if error. */
3429static int do_dout_fetch(struct scsi_cmnd *scp, u32 num, u8 *doutp)
3430{
3431 struct scsi_data_buffer *sdb = &scp->sdb;
3432
3433 if (!sdb->length)
3434 return 0;
3435 if (scp->sc_data_direction != DMA_TO_DEVICE)
3436 return -1;
3437 return sg_copy_buffer(sdb->table.sgl, sdb->table.nents, doutp,
3438 num * sdebug_sector_size, 0, true);
3439}
3440
3441/* If sip->storep+lba compares equal to arr(num), then copy top half of
3442 * arr into sip->storep+lba and return true. If comparison fails then
3443 * return false. */
3444static bool comp_write_worker(struct sdeb_store_info *sip, u64 lba, u32 num,
3445 const u8 *arr, bool compare_only)
3446{
3447 bool res;
3448 u64 block, rest = 0;
3449 u32 store_blks = sdebug_store_sectors;
3450 u32 lb_size = sdebug_sector_size;
3451 u8 *fsp = sip->storep;
3452
3453 block = do_div(lba, store_blks);
3454 if (block + num > store_blks)
3455 rest = block + num - store_blks;
3456
3457 res = !memcmp(fsp + (block * lb_size), arr, (num - rest) * lb_size);
3458 if (!res)
3459 return res;
3460 if (rest)
3461 res = memcmp(fsp, arr + ((num - rest) * lb_size),
3462 rest * lb_size);
3463 if (!res)
3464 return res;
3465 if (compare_only)
3466 return true;
3467 arr += num * lb_size;
3468 memcpy(fsp + (block * lb_size), arr, (num - rest) * lb_size);
3469 if (rest)
3470 memcpy(fsp, arr + ((num - rest) * lb_size), rest * lb_size);
3471 return res;
3472}
3473
3474static __be16 dif_compute_csum(const void *buf, int len)
3475{
3476 __be16 csum;
3477
3478 if (sdebug_guard)
3479 csum = (__force __be16)ip_compute_csum(buf, len);
3480 else
3481 csum = cpu_to_be16(crc_t10dif(buf, len));
3482
3483 return csum;
3484}
3485
3486static int dif_verify(struct t10_pi_tuple *sdt, const void *data,
3487 sector_t sector, u32 ei_lba)
3488{
3489 __be16 csum = dif_compute_csum(data, sdebug_sector_size);
3490
3491 if (sdt->guard_tag != csum) {
3492 pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
3493 (unsigned long)sector,
3494 be16_to_cpu(sdt->guard_tag),
3495 be16_to_cpu(csum));
3496 return 0x01;
3497 }
3498 if (sdebug_dif == T10_PI_TYPE1_PROTECTION &&
3499 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
3500 pr_err("REF check failed on sector %lu\n",
3501 (unsigned long)sector);
3502 return 0x03;
3503 }
3504 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3505 be32_to_cpu(sdt->ref_tag) != ei_lba) {
3506 pr_err("REF check failed on sector %lu\n",
3507 (unsigned long)sector);
3508 return 0x03;
3509 }
3510 return 0;
3511}
3512
3513static void dif_copy_prot(struct scsi_cmnd *scp, sector_t sector,
3514 unsigned int sectors, bool read)
3515{
3516 size_t resid;
3517 void *paddr;
3518 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
3519 scp->device->hostdata, true);
3520 struct t10_pi_tuple *dif_storep = sip->dif_storep;
3521 const void *dif_store_end = dif_storep + sdebug_store_sectors;
3522 struct sg_mapping_iter miter;
3523
3524 /* Bytes of protection data to copy into sgl */
3525 resid = sectors * sizeof(*dif_storep);
3526
3527 sg_miter_start(&miter, scsi_prot_sglist(scp),
3528 scsi_prot_sg_count(scp), SG_MITER_ATOMIC |
3529 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
3530
3531 while (sg_miter_next(&miter) && resid > 0) {
3532 size_t len = min_t(size_t, miter.length, resid);
3533 void *start = dif_store(sip, sector);
3534 size_t rest = 0;
3535
3536 if (dif_store_end < start + len)
3537 rest = start + len - dif_store_end;
3538
3539 paddr = miter.addr;
3540
3541 if (read)
3542 memcpy(paddr, start, len - rest);
3543 else
3544 memcpy(start, paddr, len - rest);
3545
3546 if (rest) {
3547 if (read)
3548 memcpy(paddr + len - rest, dif_storep, rest);
3549 else
3550 memcpy(dif_storep, paddr + len - rest, rest);
3551 }
3552
3553 sector += len / sizeof(*dif_storep);
3554 resid -= len;
3555 }
3556 sg_miter_stop(&miter);
3557}
3558
3559static int prot_verify_read(struct scsi_cmnd *scp, sector_t start_sec,
3560 unsigned int sectors, u32 ei_lba)
3561{
3562 int ret = 0;
3563 unsigned int i;
3564 sector_t sector;
3565 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
3566 scp->device->hostdata, true);
3567 struct t10_pi_tuple *sdt;
3568
3569 for (i = 0; i < sectors; i++, ei_lba++) {
3570 sector = start_sec + i;
3571 sdt = dif_store(sip, sector);
3572
3573 if (sdt->app_tag == cpu_to_be16(0xffff))
3574 continue;
3575
3576 /*
3577 * Because scsi_debug acts as both initiator and
3578 * target we proceed to verify the PI even if
3579 * RDPROTECT=3. This is done so the "initiator" knows
3580 * which type of error to return. Otherwise we would
3581 * have to iterate over the PI twice.
3582 */
3583 if (scp->cmnd[1] >> 5) { /* RDPROTECT */
3584 ret = dif_verify(sdt, lba2fake_store(sip, sector),
3585 sector, ei_lba);
3586 if (ret) {
3587 dif_errors++;
3588 break;
3589 }
3590 }
3591 }
3592
3593 dif_copy_prot(scp, start_sec, sectors, true);
3594 dix_reads++;
3595
3596 return ret;
3597}
3598
3599static inline void
3600sdeb_read_lock(struct sdeb_store_info *sip)
3601{
3602 if (sdebug_no_rwlock) {
3603 if (sip)
3604 __acquire(&sip->macc_lck);
3605 else
3606 __acquire(&sdeb_fake_rw_lck);
3607 } else {
3608 if (sip)
3609 read_lock(&sip->macc_lck);
3610 else
3611 read_lock(&sdeb_fake_rw_lck);
3612 }
3613}
3614
3615static inline void
3616sdeb_read_unlock(struct sdeb_store_info *sip)
3617{
3618 if (sdebug_no_rwlock) {
3619 if (sip)
3620 __release(&sip->macc_lck);
3621 else
3622 __release(&sdeb_fake_rw_lck);
3623 } else {
3624 if (sip)
3625 read_unlock(&sip->macc_lck);
3626 else
3627 read_unlock(&sdeb_fake_rw_lck);
3628 }
3629}
3630
3631static inline void
3632sdeb_write_lock(struct sdeb_store_info *sip)
3633{
3634 if (sdebug_no_rwlock) {
3635 if (sip)
3636 __acquire(&sip->macc_lck);
3637 else
3638 __acquire(&sdeb_fake_rw_lck);
3639 } else {
3640 if (sip)
3641 write_lock(&sip->macc_lck);
3642 else
3643 write_lock(&sdeb_fake_rw_lck);
3644 }
3645}
3646
3647static inline void
3648sdeb_write_unlock(struct sdeb_store_info *sip)
3649{
3650 if (sdebug_no_rwlock) {
3651 if (sip)
3652 __release(&sip->macc_lck);
3653 else
3654 __release(&sdeb_fake_rw_lck);
3655 } else {
3656 if (sip)
3657 write_unlock(&sip->macc_lck);
3658 else
3659 write_unlock(&sdeb_fake_rw_lck);
3660 }
3661}
3662
3663static int resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3664{
3665 bool check_prot;
3666 u32 num;
3667 u32 ei_lba;
3668 int ret;
3669 u64 lba;
3670 struct sdeb_store_info *sip = devip2sip(devip, true);
3671 u8 *cmd = scp->cmnd;
3672
3673 switch (cmd[0]) {
3674 case READ_16:
3675 ei_lba = 0;
3676 lba = get_unaligned_be64(cmd + 2);
3677 num = get_unaligned_be32(cmd + 10);
3678 check_prot = true;
3679 break;
3680 case READ_10:
3681 ei_lba = 0;
3682 lba = get_unaligned_be32(cmd + 2);
3683 num = get_unaligned_be16(cmd + 7);
3684 check_prot = true;
3685 break;
3686 case READ_6:
3687 ei_lba = 0;
3688 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
3689 (u32)(cmd[1] & 0x1f) << 16;
3690 num = (0 == cmd[4]) ? 256 : cmd[4];
3691 check_prot = true;
3692 break;
3693 case READ_12:
3694 ei_lba = 0;
3695 lba = get_unaligned_be32(cmd + 2);
3696 num = get_unaligned_be32(cmd + 6);
3697 check_prot = true;
3698 break;
3699 case XDWRITEREAD_10:
3700 ei_lba = 0;
3701 lba = get_unaligned_be32(cmd + 2);
3702 num = get_unaligned_be16(cmd + 7);
3703 check_prot = false;
3704 break;
3705 default: /* assume READ(32) */
3706 lba = get_unaligned_be64(cmd + 12);
3707 ei_lba = get_unaligned_be32(cmd + 20);
3708 num = get_unaligned_be32(cmd + 28);
3709 check_prot = false;
3710 break;
3711 }
3712 if (unlikely(have_dif_prot && check_prot)) {
3713 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3714 (cmd[1] & 0xe0)) {
3715 mk_sense_invalid_opcode(scp);
3716 return check_condition_result;
3717 }
3718 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3719 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3720 (cmd[1] & 0xe0) == 0)
3721 sdev_printk(KERN_ERR, scp->device, "Unprotected RD "
3722 "to DIF device\n");
3723 }
3724 if (unlikely((sdebug_opts & SDEBUG_OPT_SHORT_TRANSFER) &&
3725 atomic_read(&sdeb_inject_pending))) {
3726 num /= 2;
3727 atomic_set(&sdeb_inject_pending, 0);
3728 }
3729
3730 ret = check_device_access_params(scp, lba, num, false);
3731 if (ret)
3732 return ret;
3733 if (unlikely((SDEBUG_OPT_MEDIUM_ERR & sdebug_opts) &&
3734 (lba <= (sdebug_medium_error_start + sdebug_medium_error_count - 1)) &&
3735 ((lba + num) > sdebug_medium_error_start))) {
3736 /* claim unrecoverable read error */
3737 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
3738 /* set info field and valid bit for fixed descriptor */
3739 if (0x70 == (scp->sense_buffer[0] & 0x7f)) {
3740 scp->sense_buffer[0] |= 0x80; /* Valid bit */
3741 ret = (lba < OPT_MEDIUM_ERR_ADDR)
3742 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
3743 put_unaligned_be32(ret, scp->sense_buffer + 3);
3744 }
3745 scsi_set_resid(scp, scsi_bufflen(scp));
3746 return check_condition_result;
3747 }
3748
3749 sdeb_read_lock(sip);
3750
3751 /* DIX + T10 DIF */
3752 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3753 switch (prot_verify_read(scp, lba, num, ei_lba)) {
3754 case 1: /* Guard tag error */
3755 if (cmd[1] >> 5 != 3) { /* RDPROTECT != 3 */
3756 sdeb_read_unlock(sip);
3757 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3758 return check_condition_result;
3759 } else if (scp->prot_flags & SCSI_PROT_GUARD_CHECK) {
3760 sdeb_read_unlock(sip);
3761 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3762 return illegal_condition_result;
3763 }
3764 break;
3765 case 3: /* Reference tag error */
3766 if (cmd[1] >> 5 != 3) { /* RDPROTECT != 3 */
3767 sdeb_read_unlock(sip);
3768 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 3);
3769 return check_condition_result;
3770 } else if (scp->prot_flags & SCSI_PROT_REF_CHECK) {
3771 sdeb_read_unlock(sip);
3772 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 3);
3773 return illegal_condition_result;
3774 }
3775 break;
3776 }
3777 }
3778
3779 ret = do_device_access(sip, scp, 0, lba, num, false, 0);
3780 sdeb_read_unlock(sip);
3781 if (unlikely(ret == -1))
3782 return DID_ERROR << 16;
3783
3784 scsi_set_resid(scp, scsi_bufflen(scp) - ret);
3785
3786 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
3787 atomic_read(&sdeb_inject_pending))) {
3788 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
3789 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
3790 atomic_set(&sdeb_inject_pending, 0);
3791 return check_condition_result;
3792 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
3793 /* Logical block guard check failed */
3794 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3795 atomic_set(&sdeb_inject_pending, 0);
3796 return illegal_condition_result;
3797 } else if (SDEBUG_OPT_DIX_ERR & sdebug_opts) {
3798 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3799 atomic_set(&sdeb_inject_pending, 0);
3800 return illegal_condition_result;
3801 }
3802 }
3803 return 0;
3804}
3805
3806static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
3807 unsigned int sectors, u32 ei_lba)
3808{
3809 int ret;
3810 struct t10_pi_tuple *sdt;
3811 void *daddr;
3812 sector_t sector = start_sec;
3813 int ppage_offset;
3814 int dpage_offset;
3815 struct sg_mapping_iter diter;
3816 struct sg_mapping_iter piter;
3817
3818 BUG_ON(scsi_sg_count(SCpnt) == 0);
3819 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
3820
3821 sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
3822 scsi_prot_sg_count(SCpnt),
3823 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
3824 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
3825 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
3826
3827 /* For each protection page */
3828 while (sg_miter_next(&piter)) {
3829 dpage_offset = 0;
3830 if (WARN_ON(!sg_miter_next(&diter))) {
3831 ret = 0x01;
3832 goto out;
3833 }
3834
3835 for (ppage_offset = 0; ppage_offset < piter.length;
3836 ppage_offset += sizeof(struct t10_pi_tuple)) {
3837 /* If we're at the end of the current
3838 * data page advance to the next one
3839 */
3840 if (dpage_offset >= diter.length) {
3841 if (WARN_ON(!sg_miter_next(&diter))) {
3842 ret = 0x01;
3843 goto out;
3844 }
3845 dpage_offset = 0;
3846 }
3847
3848 sdt = piter.addr + ppage_offset;
3849 daddr = diter.addr + dpage_offset;
3850
3851 if (SCpnt->cmnd[1] >> 5 != 3) { /* WRPROTECT */
3852 ret = dif_verify(sdt, daddr, sector, ei_lba);
3853 if (ret)
3854 goto out;
3855 }
3856
3857 sector++;
3858 ei_lba++;
3859 dpage_offset += sdebug_sector_size;
3860 }
3861 diter.consumed = dpage_offset;
3862 sg_miter_stop(&diter);
3863 }
3864 sg_miter_stop(&piter);
3865
3866 dif_copy_prot(SCpnt, start_sec, sectors, false);
3867 dix_writes++;
3868
3869 return 0;
3870
3871out:
3872 dif_errors++;
3873 sg_miter_stop(&diter);
3874 sg_miter_stop(&piter);
3875 return ret;
3876}
3877
3878static unsigned long lba_to_map_index(sector_t lba)
3879{
3880 if (sdebug_unmap_alignment)
3881 lba += sdebug_unmap_granularity - sdebug_unmap_alignment;
3882 sector_div(lba, sdebug_unmap_granularity);
3883 return lba;
3884}
3885
3886static sector_t map_index_to_lba(unsigned long index)
3887{
3888 sector_t lba = index * sdebug_unmap_granularity;
3889
3890 if (sdebug_unmap_alignment)
3891 lba -= sdebug_unmap_granularity - sdebug_unmap_alignment;
3892 return lba;
3893}
3894
3895static unsigned int map_state(struct sdeb_store_info *sip, sector_t lba,
3896 unsigned int *num)
3897{
3898 sector_t end;
3899 unsigned int mapped;
3900 unsigned long index;
3901 unsigned long next;
3902
3903 index = lba_to_map_index(lba);
3904 mapped = test_bit(index, sip->map_storep);
3905
3906 if (mapped)
3907 next = find_next_zero_bit(sip->map_storep, map_size, index);
3908 else
3909 next = find_next_bit(sip->map_storep, map_size, index);
3910
3911 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
3912 *num = end - lba;
3913 return mapped;
3914}
3915
3916static void map_region(struct sdeb_store_info *sip, sector_t lba,
3917 unsigned int len)
3918{
3919 sector_t end = lba + len;
3920
3921 while (lba < end) {
3922 unsigned long index = lba_to_map_index(lba);
3923
3924 if (index < map_size)
3925 set_bit(index, sip->map_storep);
3926
3927 lba = map_index_to_lba(index + 1);
3928 }
3929}
3930
3931static void unmap_region(struct sdeb_store_info *sip, sector_t lba,
3932 unsigned int len)
3933{
3934 sector_t end = lba + len;
3935 u8 *fsp = sip->storep;
3936
3937 while (lba < end) {
3938 unsigned long index = lba_to_map_index(lba);
3939
3940 if (lba == map_index_to_lba(index) &&
3941 lba + sdebug_unmap_granularity <= end &&
3942 index < map_size) {
3943 clear_bit(index, sip->map_storep);
3944 if (sdebug_lbprz) { /* for LBPRZ=2 return 0xff_s */
3945 memset(fsp + lba * sdebug_sector_size,
3946 (sdebug_lbprz & 1) ? 0 : 0xff,
3947 sdebug_sector_size *
3948 sdebug_unmap_granularity);
3949 }
3950 if (sip->dif_storep) {
3951 memset(sip->dif_storep + lba, 0xff,
3952 sizeof(*sip->dif_storep) *
3953 sdebug_unmap_granularity);
3954 }
3955 }
3956 lba = map_index_to_lba(index + 1);
3957 }
3958}
3959
3960static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3961{
3962 bool check_prot;
3963 u32 num;
3964 u8 group = 0;
3965 u32 ei_lba;
3966 int ret;
3967 u64 lba;
3968 struct sdeb_store_info *sip = devip2sip(devip, true);
3969 u8 *cmd = scp->cmnd;
3970
3971 switch (cmd[0]) {
3972 case WRITE_16:
3973 ei_lba = 0;
3974 lba = get_unaligned_be64(cmd + 2);
3975 num = get_unaligned_be32(cmd + 10);
3976 group = cmd[14] & 0x3f;
3977 check_prot = true;
3978 break;
3979 case WRITE_10:
3980 ei_lba = 0;
3981 lba = get_unaligned_be32(cmd + 2);
3982 group = cmd[6] & 0x3f;
3983 num = get_unaligned_be16(cmd + 7);
3984 check_prot = true;
3985 break;
3986 case WRITE_6:
3987 ei_lba = 0;
3988 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
3989 (u32)(cmd[1] & 0x1f) << 16;
3990 num = (0 == cmd[4]) ? 256 : cmd[4];
3991 check_prot = true;
3992 break;
3993 case WRITE_12:
3994 ei_lba = 0;
3995 lba = get_unaligned_be32(cmd + 2);
3996 num = get_unaligned_be32(cmd + 6);
3997 group = cmd[6] & 0x3f;
3998 check_prot = true;
3999 break;
4000 case 0x53: /* XDWRITEREAD(10) */
4001 ei_lba = 0;
4002 lba = get_unaligned_be32(cmd + 2);
4003 group = cmd[6] & 0x1f;
4004 num = get_unaligned_be16(cmd + 7);
4005 check_prot = false;
4006 break;
4007 default: /* assume WRITE(32) */
4008 group = cmd[6] & 0x3f;
4009 lba = get_unaligned_be64(cmd + 12);
4010 ei_lba = get_unaligned_be32(cmd + 20);
4011 num = get_unaligned_be32(cmd + 28);
4012 check_prot = false;
4013 break;
4014 }
4015 if (unlikely(have_dif_prot && check_prot)) {
4016 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
4017 (cmd[1] & 0xe0)) {
4018 mk_sense_invalid_opcode(scp);
4019 return check_condition_result;
4020 }
4021 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
4022 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
4023 (cmd[1] & 0xe0) == 0)
4024 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
4025 "to DIF device\n");
4026 }
4027
4028 sdeb_write_lock(sip);
4029 ret = check_device_access_params(scp, lba, num, true);
4030 if (ret) {
4031 sdeb_write_unlock(sip);
4032 return ret;
4033 }
4034
4035 /* DIX + T10 DIF */
4036 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
4037 switch (prot_verify_write(scp, lba, num, ei_lba)) {
4038 case 1: /* Guard tag error */
4039 if (scp->prot_flags & SCSI_PROT_GUARD_CHECK) {
4040 sdeb_write_unlock(sip);
4041 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
4042 return illegal_condition_result;
4043 } else if (scp->cmnd[1] >> 5 != 3) { /* WRPROTECT != 3 */
4044 sdeb_write_unlock(sip);
4045 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
4046 return check_condition_result;
4047 }
4048 break;
4049 case 3: /* Reference tag error */
4050 if (scp->prot_flags & SCSI_PROT_REF_CHECK) {
4051 sdeb_write_unlock(sip);
4052 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 3);
4053 return illegal_condition_result;
4054 } else if (scp->cmnd[1] >> 5 != 3) { /* WRPROTECT != 3 */
4055 sdeb_write_unlock(sip);
4056 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 3);
4057 return check_condition_result;
4058 }
4059 break;
4060 }
4061 }
4062
4063 ret = do_device_access(sip, scp, 0, lba, num, true, group);
4064 if (unlikely(scsi_debug_lbp()))
4065 map_region(sip, lba, num);
4066 /* If ZBC zone then bump its write pointer */
4067 if (sdebug_dev_is_zoned(devip))
4068 zbc_inc_wp(devip, lba, num);
4069 sdeb_write_unlock(sip);
4070 if (unlikely(-1 == ret))
4071 return DID_ERROR << 16;
4072 else if (unlikely(sdebug_verbose &&
4073 (ret < (num * sdebug_sector_size))))
4074 sdev_printk(KERN_INFO, scp->device,
4075 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
4076 my_name, num * sdebug_sector_size, ret);
4077
4078 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
4079 atomic_read(&sdeb_inject_pending))) {
4080 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
4081 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
4082 atomic_set(&sdeb_inject_pending, 0);
4083 return check_condition_result;
4084 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
4085 /* Logical block guard check failed */
4086 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
4087 atomic_set(&sdeb_inject_pending, 0);
4088 return illegal_condition_result;
4089 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) {
4090 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
4091 atomic_set(&sdeb_inject_pending, 0);
4092 return illegal_condition_result;
4093 }
4094 }
4095 return 0;
4096}
4097
4098/*
4099 * T10 has only specified WRITE SCATTERED(16) and WRITE SCATTERED(32).
4100 * No READ GATHERED yet (requires bidi or long cdb holding gather list).
4101 */
4102static int resp_write_scat(struct scsi_cmnd *scp,
4103 struct sdebug_dev_info *devip)
4104{
4105 u8 *cmd = scp->cmnd;
4106 u8 *lrdp = NULL;
4107 u8 *up;
4108 struct sdeb_store_info *sip = devip2sip(devip, true);
4109 u8 wrprotect;
4110 u16 lbdof, num_lrd, k;
4111 u32 num, num_by, bt_len, lbdof_blen, sg_off, cum_lb;
4112 u32 lb_size = sdebug_sector_size;
4113 u32 ei_lba;
4114 u64 lba;
4115 u8 group;
4116 int ret, res;
4117 bool is_16;
4118 static const u32 lrd_size = 32; /* + parameter list header size */
4119
4120 if (cmd[0] == VARIABLE_LENGTH_CMD) {
4121 is_16 = false;
4122 group = cmd[6] & 0x3f;
4123 wrprotect = (cmd[10] >> 5) & 0x7;
4124 lbdof = get_unaligned_be16(cmd + 12);
4125 num_lrd = get_unaligned_be16(cmd + 16);
4126 bt_len = get_unaligned_be32(cmd + 28);
4127 } else { /* that leaves WRITE SCATTERED(16) */
4128 is_16 = true;
4129 wrprotect = (cmd[2] >> 5) & 0x7;
4130 lbdof = get_unaligned_be16(cmd + 4);
4131 num_lrd = get_unaligned_be16(cmd + 8);
4132 bt_len = get_unaligned_be32(cmd + 10);
4133 group = cmd[14] & 0x3f;
4134 if (unlikely(have_dif_prot)) {
4135 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
4136 wrprotect) {
4137 mk_sense_invalid_opcode(scp);
4138 return illegal_condition_result;
4139 }
4140 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
4141 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
4142 wrprotect == 0)
4143 sdev_printk(KERN_ERR, scp->device,
4144 "Unprotected WR to DIF device\n");
4145 }
4146 }
4147 if ((num_lrd == 0) || (bt_len == 0))
4148 return 0; /* T10 says these do-nothings are not errors */
4149 if (lbdof == 0) {
4150 if (sdebug_verbose)
4151 sdev_printk(KERN_INFO, scp->device,
4152 "%s: %s: LB Data Offset field bad\n",
4153 my_name, __func__);
4154 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4155 return illegal_condition_result;
4156 }
4157 lbdof_blen = lbdof * lb_size;
4158 if ((lrd_size + (num_lrd * lrd_size)) > lbdof_blen) {
4159 if (sdebug_verbose)
4160 sdev_printk(KERN_INFO, scp->device,
4161 "%s: %s: LBA range descriptors don't fit\n",
4162 my_name, __func__);
4163 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4164 return illegal_condition_result;
4165 }
4166 lrdp = kzalloc(lbdof_blen, GFP_ATOMIC | __GFP_NOWARN);
4167 if (lrdp == NULL)
4168 return SCSI_MLQUEUE_HOST_BUSY;
4169 if (sdebug_verbose)
4170 sdev_printk(KERN_INFO, scp->device,
4171 "%s: %s: Fetch header+scatter_list, lbdof_blen=%u\n",
4172 my_name, __func__, lbdof_blen);
4173 res = fetch_to_dev_buffer(scp, lrdp, lbdof_blen);
4174 if (res == -1) {
4175 ret = DID_ERROR << 16;
4176 goto err_out;
4177 }
4178
4179 sdeb_write_lock(sip);
4180 sg_off = lbdof_blen;
4181 /* Spec says Buffer xfer Length field in number of LBs in dout */
4182 cum_lb = 0;
4183 for (k = 0, up = lrdp + lrd_size; k < num_lrd; ++k, up += lrd_size) {
4184 lba = get_unaligned_be64(up + 0);
4185 num = get_unaligned_be32(up + 8);
4186 if (sdebug_verbose)
4187 sdev_printk(KERN_INFO, scp->device,
4188 "%s: %s: k=%d LBA=0x%llx num=%u sg_off=%u\n",
4189 my_name, __func__, k, lba, num, sg_off);
4190 if (num == 0)
4191 continue;
4192 ret = check_device_access_params(scp, lba, num, true);
4193 if (ret)
4194 goto err_out_unlock;
4195 num_by = num * lb_size;
4196 ei_lba = is_16 ? 0 : get_unaligned_be32(up + 12);
4197
4198 if ((cum_lb + num) > bt_len) {
4199 if (sdebug_verbose)
4200 sdev_printk(KERN_INFO, scp->device,
4201 "%s: %s: sum of blocks > data provided\n",
4202 my_name, __func__);
4203 mk_sense_buffer(scp, ILLEGAL_REQUEST, WRITE_ERROR_ASC,
4204 0);
4205 ret = illegal_condition_result;
4206 goto err_out_unlock;
4207 }
4208
4209 /* DIX + T10 DIF */
4210 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
4211 int prot_ret = prot_verify_write(scp, lba, num,
4212 ei_lba);
4213
4214 if (prot_ret) {
4215 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10,
4216 prot_ret);
4217 ret = illegal_condition_result;
4218 goto err_out_unlock;
4219 }
4220 }
4221
4222 ret = do_device_access(sip, scp, sg_off, lba, num, true, group);
4223 /* If ZBC zone then bump its write pointer */
4224 if (sdebug_dev_is_zoned(devip))
4225 zbc_inc_wp(devip, lba, num);
4226 if (unlikely(scsi_debug_lbp()))
4227 map_region(sip, lba, num);
4228 if (unlikely(-1 == ret)) {
4229 ret = DID_ERROR << 16;
4230 goto err_out_unlock;
4231 } else if (unlikely(sdebug_verbose && (ret < num_by)))
4232 sdev_printk(KERN_INFO, scp->device,
4233 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
4234 my_name, num_by, ret);
4235
4236 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
4237 atomic_read(&sdeb_inject_pending))) {
4238 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
4239 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
4240 atomic_set(&sdeb_inject_pending, 0);
4241 ret = check_condition_result;
4242 goto err_out_unlock;
4243 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
4244 /* Logical block guard check failed */
4245 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
4246 atomic_set(&sdeb_inject_pending, 0);
4247 ret = illegal_condition_result;
4248 goto err_out_unlock;
4249 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) {
4250 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
4251 atomic_set(&sdeb_inject_pending, 0);
4252 ret = illegal_condition_result;
4253 goto err_out_unlock;
4254 }
4255 }
4256 sg_off += num_by;
4257 cum_lb += num;
4258 }
4259 ret = 0;
4260err_out_unlock:
4261 sdeb_write_unlock(sip);
4262err_out:
4263 kfree(lrdp);
4264 return ret;
4265}
4266
4267static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num,
4268 u32 ei_lba, bool unmap, bool ndob)
4269{
4270 struct scsi_device *sdp = scp->device;
4271 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
4272 unsigned long long i;
4273 u64 block, lbaa;
4274 u32 lb_size = sdebug_sector_size;
4275 int ret;
4276 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
4277 scp->device->hostdata, true);
4278 u8 *fs1p;
4279 u8 *fsp;
4280
4281 sdeb_write_lock(sip);
4282
4283 ret = check_device_access_params(scp, lba, num, true);
4284 if (ret) {
4285 sdeb_write_unlock(sip);
4286 return ret;
4287 }
4288
4289 if (unmap && scsi_debug_lbp()) {
4290 unmap_region(sip, lba, num);
4291 goto out;
4292 }
4293 lbaa = lba;
4294 block = do_div(lbaa, sdebug_store_sectors);
4295 /* if ndob then zero 1 logical block, else fetch 1 logical block */
4296 fsp = sip->storep;
4297 fs1p = fsp + (block * lb_size);
4298 if (ndob) {
4299 memset(fs1p, 0, lb_size);
4300 ret = 0;
4301 } else
4302 ret = fetch_to_dev_buffer(scp, fs1p, lb_size);
4303
4304 if (-1 == ret) {
4305 sdeb_write_unlock(sip);
4306 return DID_ERROR << 16;
4307 } else if (sdebug_verbose && !ndob && (ret < lb_size))
4308 sdev_printk(KERN_INFO, scp->device,
4309 "%s: %s: lb size=%u, IO sent=%d bytes\n",
4310 my_name, "write same", lb_size, ret);
4311
4312 /* Copy first sector to remaining blocks */
4313 for (i = 1 ; i < num ; i++) {
4314 lbaa = lba + i;
4315 block = do_div(lbaa, sdebug_store_sectors);
4316 memmove(fsp + (block * lb_size), fs1p, lb_size);
4317 }
4318 if (scsi_debug_lbp())
4319 map_region(sip, lba, num);
4320 /* If ZBC zone then bump its write pointer */
4321 if (sdebug_dev_is_zoned(devip))
4322 zbc_inc_wp(devip, lba, num);
4323out:
4324 sdeb_write_unlock(sip);
4325
4326 return 0;
4327}
4328
4329static int resp_write_same_10(struct scsi_cmnd *scp,
4330 struct sdebug_dev_info *devip)
4331{
4332 u8 *cmd = scp->cmnd;
4333 u32 lba;
4334 u16 num;
4335 u32 ei_lba = 0;
4336 bool unmap = false;
4337
4338 if (cmd[1] & 0x8) {
4339 if (sdebug_lbpws10 == 0) {
4340 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
4341 return check_condition_result;
4342 } else
4343 unmap = true;
4344 }
4345 lba = get_unaligned_be32(cmd + 2);
4346 num = get_unaligned_be16(cmd + 7);
4347 if (num > sdebug_write_same_length) {
4348 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
4349 return check_condition_result;
4350 }
4351 return resp_write_same(scp, lba, num, ei_lba, unmap, false);
4352}
4353
4354static int resp_write_same_16(struct scsi_cmnd *scp,
4355 struct sdebug_dev_info *devip)
4356{
4357 u8 *cmd = scp->cmnd;
4358 u64 lba;
4359 u32 num;
4360 u32 ei_lba = 0;
4361 bool unmap = false;
4362 bool ndob = false;
4363
4364 if (cmd[1] & 0x8) { /* UNMAP */
4365 if (sdebug_lbpws == 0) {
4366 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
4367 return check_condition_result;
4368 } else
4369 unmap = true;
4370 }
4371 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */
4372 ndob = true;
4373 lba = get_unaligned_be64(cmd + 2);
4374 num = get_unaligned_be32(cmd + 10);
4375 if (num > sdebug_write_same_length) {
4376 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
4377 return check_condition_result;
4378 }
4379 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob);
4380}
4381
4382/* Note the mode field is in the same position as the (lower) service action
4383 * field. For the Report supported operation codes command, SPC-4 suggests
4384 * each mode of this command should be reported separately; for future. */
4385static int resp_write_buffer(struct scsi_cmnd *scp,
4386 struct sdebug_dev_info *devip)
4387{
4388 u8 *cmd = scp->cmnd;
4389 struct scsi_device *sdp = scp->device;
4390 struct sdebug_dev_info *dp;
4391 u8 mode;
4392
4393 mode = cmd[1] & 0x1f;
4394 switch (mode) {
4395 case 0x4: /* download microcode (MC) and activate (ACT) */
4396 /* set UAs on this device only */
4397 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
4398 set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm);
4399 break;
4400 case 0x5: /* download MC, save and ACT */
4401 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm);
4402 break;
4403 case 0x6: /* download MC with offsets and ACT */
4404 /* set UAs on most devices (LUs) in this target */
4405 list_for_each_entry(dp,
4406 &devip->sdbg_host->dev_info_list,
4407 dev_list)
4408 if (dp->target == sdp->id) {
4409 set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm);
4410 if (devip != dp)
4411 set_bit(SDEBUG_UA_MICROCODE_CHANGED,
4412 dp->uas_bm);
4413 }
4414 break;
4415 case 0x7: /* download MC with offsets, save, and ACT */
4416 /* set UA on all devices (LUs) in this target */
4417 list_for_each_entry(dp,
4418 &devip->sdbg_host->dev_info_list,
4419 dev_list)
4420 if (dp->target == sdp->id)
4421 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET,
4422 dp->uas_bm);
4423 break;
4424 default:
4425 /* do nothing for this command for other mode values */
4426 break;
4427 }
4428 return 0;
4429}
4430
4431static int resp_comp_write(struct scsi_cmnd *scp,
4432 struct sdebug_dev_info *devip)
4433{
4434 u8 *cmd = scp->cmnd;
4435 u8 *arr;
4436 struct sdeb_store_info *sip = devip2sip(devip, true);
4437 u64 lba;
4438 u32 dnum;
4439 u32 lb_size = sdebug_sector_size;
4440 u8 num;
4441 int ret;
4442 int retval = 0;
4443
4444 lba = get_unaligned_be64(cmd + 2);
4445 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */
4446 if (0 == num)
4447 return 0; /* degenerate case, not an error */
4448 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
4449 (cmd[1] & 0xe0)) {
4450 mk_sense_invalid_opcode(scp);
4451 return check_condition_result;
4452 }
4453 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
4454 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
4455 (cmd[1] & 0xe0) == 0)
4456 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
4457 "to DIF device\n");
4458 ret = check_device_access_params(scp, lba, num, false);
4459 if (ret)
4460 return ret;
4461 dnum = 2 * num;
4462 arr = kcalloc(lb_size, dnum, GFP_ATOMIC);
4463 if (NULL == arr) {
4464 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
4465 INSUFF_RES_ASCQ);
4466 return check_condition_result;
4467 }
4468
4469 sdeb_write_lock(sip);
4470
4471 ret = do_dout_fetch(scp, dnum, arr);
4472 if (ret == -1) {
4473 retval = DID_ERROR << 16;
4474 goto cleanup;
4475 } else if (sdebug_verbose && (ret < (dnum * lb_size)))
4476 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb "
4477 "indicated=%u, IO sent=%d bytes\n", my_name,
4478 dnum * lb_size, ret);
4479 if (!comp_write_worker(sip, lba, num, arr, false)) {
4480 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
4481 retval = check_condition_result;
4482 goto cleanup;
4483 }
4484 if (scsi_debug_lbp())
4485 map_region(sip, lba, num);
4486cleanup:
4487 sdeb_write_unlock(sip);
4488 kfree(arr);
4489 return retval;
4490}
4491
4492struct unmap_block_desc {
4493 __be64 lba;
4494 __be32 blocks;
4495 __be32 __reserved;
4496};
4497
4498static int resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4499{
4500 unsigned char *buf;
4501 struct unmap_block_desc *desc;
4502 struct sdeb_store_info *sip = devip2sip(devip, true);
4503 unsigned int i, payload_len, descriptors;
4504 int ret;
4505
4506 if (!scsi_debug_lbp())
4507 return 0; /* fib and say its done */
4508 payload_len = get_unaligned_be16(scp->cmnd + 7);
4509 BUG_ON(scsi_bufflen(scp) != payload_len);
4510
4511 descriptors = (payload_len - 8) / 16;
4512 if (descriptors > sdebug_unmap_max_desc) {
4513 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
4514 return check_condition_result;
4515 }
4516
4517 buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC);
4518 if (!buf) {
4519 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
4520 INSUFF_RES_ASCQ);
4521 return check_condition_result;
4522 }
4523
4524 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
4525
4526 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
4527 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
4528
4529 desc = (void *)&buf[8];
4530
4531 sdeb_write_lock(sip);
4532
4533 for (i = 0 ; i < descriptors ; i++) {
4534 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
4535 unsigned int num = get_unaligned_be32(&desc[i].blocks);
4536
4537 ret = check_device_access_params(scp, lba, num, true);
4538 if (ret)
4539 goto out;
4540
4541 unmap_region(sip, lba, num);
4542 }
4543
4544 ret = 0;
4545
4546out:
4547 sdeb_write_unlock(sip);
4548 kfree(buf);
4549
4550 return ret;
4551}
4552
4553#define SDEBUG_GET_LBA_STATUS_LEN 32
4554
4555static int resp_get_lba_status(struct scsi_cmnd *scp,
4556 struct sdebug_dev_info *devip)
4557{
4558 u8 *cmd = scp->cmnd;
4559 u64 lba;
4560 u32 alloc_len, mapped, num;
4561 int ret;
4562 u8 arr[SDEBUG_GET_LBA_STATUS_LEN];
4563
4564 lba = get_unaligned_be64(cmd + 2);
4565 alloc_len = get_unaligned_be32(cmd + 10);
4566
4567 if (alloc_len < 24)
4568 return 0;
4569
4570 ret = check_device_access_params(scp, lba, 1, false);
4571 if (ret)
4572 return ret;
4573
4574 if (scsi_debug_lbp()) {
4575 struct sdeb_store_info *sip = devip2sip(devip, true);
4576
4577 mapped = map_state(sip, lba, &num);
4578 } else {
4579 mapped = 1;
4580 /* following just in case virtual_gb changed */
4581 sdebug_capacity = get_sdebug_capacity();
4582 if (sdebug_capacity - lba <= 0xffffffff)
4583 num = sdebug_capacity - lba;
4584 else
4585 num = 0xffffffff;
4586 }
4587
4588 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
4589 put_unaligned_be32(20, arr); /* Parameter Data Length */
4590 put_unaligned_be64(lba, arr + 8); /* LBA */
4591 put_unaligned_be32(num, arr + 16); /* Number of blocks */
4592 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */
4593
4594 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN);
4595}
4596
4597static int resp_get_stream_status(struct scsi_cmnd *scp,
4598 struct sdebug_dev_info *devip)
4599{
4600 u16 starting_stream_id, stream_id;
4601 const u8 *cmd = scp->cmnd;
4602 u32 alloc_len, offset;
4603 u8 arr[256] = {};
4604 struct scsi_stream_status_header *h = (void *)arr;
4605
4606 starting_stream_id = get_unaligned_be16(cmd + 4);
4607 alloc_len = get_unaligned_be32(cmd + 10);
4608
4609 if (alloc_len < 8) {
4610 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
4611 return check_condition_result;
4612 }
4613
4614 if (starting_stream_id >= MAXIMUM_NUMBER_OF_STREAMS) {
4615 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
4616 return check_condition_result;
4617 }
4618
4619 /*
4620 * The GET STREAM STATUS command only reports status information
4621 * about open streams. Treat the non-permanent stream as open.
4622 */
4623 put_unaligned_be16(MAXIMUM_NUMBER_OF_STREAMS,
4624 &h->number_of_open_streams);
4625
4626 for (offset = 8, stream_id = starting_stream_id;
4627 offset + 8 <= min_t(u32, alloc_len, sizeof(arr)) &&
4628 stream_id < MAXIMUM_NUMBER_OF_STREAMS;
4629 offset += 8, stream_id++) {
4630 struct scsi_stream_status *stream_status = (void *)arr + offset;
4631
4632 stream_status->perm = stream_id < PERMANENT_STREAM_COUNT;
4633 put_unaligned_be16(stream_id,
4634 &stream_status->stream_identifier);
4635 stream_status->rel_lifetime = stream_id + 1;
4636 }
4637 put_unaligned_be32(offset - 8, &h->len); /* PARAMETER DATA LENGTH */
4638
4639 return fill_from_dev_buffer(scp, arr, min(offset, alloc_len));
4640}
4641
4642static int resp_sync_cache(struct scsi_cmnd *scp,
4643 struct sdebug_dev_info *devip)
4644{
4645 int res = 0;
4646 u64 lba;
4647 u32 num_blocks;
4648 u8 *cmd = scp->cmnd;
4649
4650 if (cmd[0] == SYNCHRONIZE_CACHE) { /* 10 byte cdb */
4651 lba = get_unaligned_be32(cmd + 2);
4652 num_blocks = get_unaligned_be16(cmd + 7);
4653 } else { /* SYNCHRONIZE_CACHE(16) */
4654 lba = get_unaligned_be64(cmd + 2);
4655 num_blocks = get_unaligned_be32(cmd + 10);
4656 }
4657 if (lba + num_blocks > sdebug_capacity) {
4658 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4659 return check_condition_result;
4660 }
4661 if (!write_since_sync || (cmd[1] & 0x2))
4662 res = SDEG_RES_IMMED_MASK;
4663 else /* delay if write_since_sync and IMMED clear */
4664 write_since_sync = false;
4665 return res;
4666}
4667
4668/*
4669 * Assuming the LBA+num_blocks is not out-of-range, this function will return
4670 * CONDITION MET if the specified blocks will/have fitted in the cache, and
4671 * a GOOD status otherwise. Model a disk with a big cache and yield
4672 * CONDITION MET. Actually tries to bring range in main memory into the
4673 * cache associated with the CPU(s).
4674 */
4675static int resp_pre_fetch(struct scsi_cmnd *scp,
4676 struct sdebug_dev_info *devip)
4677{
4678 int res = 0;
4679 u64 lba;
4680 u64 block, rest = 0;
4681 u32 nblks;
4682 u8 *cmd = scp->cmnd;
4683 struct sdeb_store_info *sip = devip2sip(devip, true);
4684 u8 *fsp = sip->storep;
4685
4686 if (cmd[0] == PRE_FETCH) { /* 10 byte cdb */
4687 lba = get_unaligned_be32(cmd + 2);
4688 nblks = get_unaligned_be16(cmd + 7);
4689 } else { /* PRE-FETCH(16) */
4690 lba = get_unaligned_be64(cmd + 2);
4691 nblks = get_unaligned_be32(cmd + 10);
4692 }
4693 if (lba + nblks > sdebug_capacity) {
4694 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4695 return check_condition_result;
4696 }
4697 if (!fsp)
4698 goto fini;
4699 /* PRE-FETCH spec says nothing about LBP or PI so skip them */
4700 block = do_div(lba, sdebug_store_sectors);
4701 if (block + nblks > sdebug_store_sectors)
4702 rest = block + nblks - sdebug_store_sectors;
4703
4704 /* Try to bring the PRE-FETCH range into CPU's cache */
4705 sdeb_read_lock(sip);
4706 prefetch_range(fsp + (sdebug_sector_size * block),
4707 (nblks - rest) * sdebug_sector_size);
4708 if (rest)
4709 prefetch_range(fsp, rest * sdebug_sector_size);
4710 sdeb_read_unlock(sip);
4711fini:
4712 if (cmd[1] & 0x2)
4713 res = SDEG_RES_IMMED_MASK;
4714 return res | condition_met_result;
4715}
4716
4717#define RL_BUCKET_ELEMS 8
4718
4719/* Even though each pseudo target has a REPORT LUNS "well known logical unit"
4720 * (W-LUN), the normal Linux scanning logic does not associate it with a
4721 * device (e.g. /dev/sg7). The following magic will make that association:
4722 * "cd /sys/class/scsi_host/host<n> ; echo '- - 49409' > scan"
4723 * where <n> is a host number. If there are multiple targets in a host then
4724 * the above will associate a W-LUN to each target. To only get a W-LUN
4725 * for target 2, then use "echo '- 2 49409' > scan" .
4726 */
4727static int resp_report_luns(struct scsi_cmnd *scp,
4728 struct sdebug_dev_info *devip)
4729{
4730 unsigned char *cmd = scp->cmnd;
4731 unsigned int alloc_len;
4732 unsigned char select_report;
4733 u64 lun;
4734 struct scsi_lun *lun_p;
4735 u8 arr[RL_BUCKET_ELEMS * sizeof(struct scsi_lun)];
4736 unsigned int lun_cnt; /* normal LUN count (max: 256) */
4737 unsigned int wlun_cnt; /* report luns W-LUN count */
4738 unsigned int tlun_cnt; /* total LUN count */
4739 unsigned int rlen; /* response length (in bytes) */
4740 int k, j, n, res;
4741 unsigned int off_rsp = 0;
4742 const int sz_lun = sizeof(struct scsi_lun);
4743
4744 clear_luns_changed_on_target(devip);
4745
4746 select_report = cmd[2];
4747 alloc_len = get_unaligned_be32(cmd + 6);
4748
4749 if (alloc_len < 4) {
4750 pr_err("alloc len too small %d\n", alloc_len);
4751 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
4752 return check_condition_result;
4753 }
4754
4755 switch (select_report) {
4756 case 0: /* all LUNs apart from W-LUNs */
4757 lun_cnt = sdebug_max_luns;
4758 wlun_cnt = 0;
4759 break;
4760 case 1: /* only W-LUNs */
4761 lun_cnt = 0;
4762 wlun_cnt = 1;
4763 break;
4764 case 2: /* all LUNs */
4765 lun_cnt = sdebug_max_luns;
4766 wlun_cnt = 1;
4767 break;
4768 case 0x10: /* only administrative LUs */
4769 case 0x11: /* see SPC-5 */
4770 case 0x12: /* only subsiduary LUs owned by referenced LU */
4771 default:
4772 pr_debug("select report invalid %d\n", select_report);
4773 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
4774 return check_condition_result;
4775 }
4776
4777 if (sdebug_no_lun_0 && (lun_cnt > 0))
4778 --lun_cnt;
4779
4780 tlun_cnt = lun_cnt + wlun_cnt;
4781 rlen = tlun_cnt * sz_lun; /* excluding 8 byte header */
4782 scsi_set_resid(scp, scsi_bufflen(scp));
4783 pr_debug("select_report %d luns = %d wluns = %d no_lun0 %d\n",
4784 select_report, lun_cnt, wlun_cnt, sdebug_no_lun_0);
4785
4786 /* loops rely on sizeof response header same as sizeof lun (both 8) */
4787 lun = sdebug_no_lun_0 ? 1 : 0;
4788 for (k = 0, j = 0, res = 0; true; ++k, j = 0) {
4789 memset(arr, 0, sizeof(arr));
4790 lun_p = (struct scsi_lun *)&arr[0];
4791 if (k == 0) {
4792 put_unaligned_be32(rlen, &arr[0]);
4793 ++lun_p;
4794 j = 1;
4795 }
4796 for ( ; j < RL_BUCKET_ELEMS; ++j, ++lun_p) {
4797 if ((k * RL_BUCKET_ELEMS) + j > lun_cnt)
4798 break;
4799 int_to_scsilun(lun++, lun_p);
4800 if (lun > 1 && sdebug_lun_am == SAM_LUN_AM_FLAT)
4801 lun_p->scsi_lun[0] |= 0x40;
4802 }
4803 if (j < RL_BUCKET_ELEMS)
4804 break;
4805 n = j * sz_lun;
4806 res = p_fill_from_dev_buffer(scp, arr, n, off_rsp);
4807 if (res)
4808 return res;
4809 off_rsp += n;
4810 }
4811 if (wlun_cnt) {
4812 int_to_scsilun(SCSI_W_LUN_REPORT_LUNS, lun_p);
4813 ++j;
4814 }
4815 if (j > 0)
4816 res = p_fill_from_dev_buffer(scp, arr, j * sz_lun, off_rsp);
4817 return res;
4818}
4819
4820static int resp_verify(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4821{
4822 bool is_bytchk3 = false;
4823 u8 bytchk;
4824 int ret, j;
4825 u32 vnum, a_num, off;
4826 const u32 lb_size = sdebug_sector_size;
4827 u64 lba;
4828 u8 *arr;
4829 u8 *cmd = scp->cmnd;
4830 struct sdeb_store_info *sip = devip2sip(devip, true);
4831
4832 bytchk = (cmd[1] >> 1) & 0x3;
4833 if (bytchk == 0) {
4834 return 0; /* always claim internal verify okay */
4835 } else if (bytchk == 2) {
4836 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
4837 return check_condition_result;
4838 } else if (bytchk == 3) {
4839 is_bytchk3 = true; /* 1 block sent, compared repeatedly */
4840 }
4841 switch (cmd[0]) {
4842 case VERIFY_16:
4843 lba = get_unaligned_be64(cmd + 2);
4844 vnum = get_unaligned_be32(cmd + 10);
4845 break;
4846 case VERIFY: /* is VERIFY(10) */
4847 lba = get_unaligned_be32(cmd + 2);
4848 vnum = get_unaligned_be16(cmd + 7);
4849 break;
4850 default:
4851 mk_sense_invalid_opcode(scp);
4852 return check_condition_result;
4853 }
4854 if (vnum == 0)
4855 return 0; /* not an error */
4856 a_num = is_bytchk3 ? 1 : vnum;
4857 /* Treat following check like one for read (i.e. no write) access */
4858 ret = check_device_access_params(scp, lba, a_num, false);
4859 if (ret)
4860 return ret;
4861
4862 arr = kcalloc(lb_size, vnum, GFP_ATOMIC | __GFP_NOWARN);
4863 if (!arr) {
4864 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
4865 INSUFF_RES_ASCQ);
4866 return check_condition_result;
4867 }
4868 /* Not changing store, so only need read access */
4869 sdeb_read_lock(sip);
4870
4871 ret = do_dout_fetch(scp, a_num, arr);
4872 if (ret == -1) {
4873 ret = DID_ERROR << 16;
4874 goto cleanup;
4875 } else if (sdebug_verbose && (ret < (a_num * lb_size))) {
4876 sdev_printk(KERN_INFO, scp->device,
4877 "%s: %s: cdb indicated=%u, IO sent=%d bytes\n",
4878 my_name, __func__, a_num * lb_size, ret);
4879 }
4880 if (is_bytchk3) {
4881 for (j = 1, off = lb_size; j < vnum; ++j, off += lb_size)
4882 memcpy(arr + off, arr, lb_size);
4883 }
4884 ret = 0;
4885 if (!comp_write_worker(sip, lba, vnum, arr, true)) {
4886 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
4887 ret = check_condition_result;
4888 goto cleanup;
4889 }
4890cleanup:
4891 sdeb_read_unlock(sip);
4892 kfree(arr);
4893 return ret;
4894}
4895
4896#define RZONES_DESC_HD 64
4897
4898/* Report zones depending on start LBA and reporting options */
4899static int resp_report_zones(struct scsi_cmnd *scp,
4900 struct sdebug_dev_info *devip)
4901{
4902 unsigned int rep_max_zones, nrz = 0;
4903 int ret = 0;
4904 u32 alloc_len, rep_opts, rep_len;
4905 bool partial;
4906 u64 lba, zs_lba;
4907 u8 *arr = NULL, *desc;
4908 u8 *cmd = scp->cmnd;
4909 struct sdeb_zone_state *zsp = NULL;
4910 struct sdeb_store_info *sip = devip2sip(devip, false);
4911
4912 if (!sdebug_dev_is_zoned(devip)) {
4913 mk_sense_invalid_opcode(scp);
4914 return check_condition_result;
4915 }
4916 zs_lba = get_unaligned_be64(cmd + 2);
4917 alloc_len = get_unaligned_be32(cmd + 10);
4918 if (alloc_len == 0)
4919 return 0; /* not an error */
4920 rep_opts = cmd[14] & 0x3f;
4921 partial = cmd[14] & 0x80;
4922
4923 if (zs_lba >= sdebug_capacity) {
4924 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4925 return check_condition_result;
4926 }
4927
4928 rep_max_zones = (alloc_len - 64) >> ilog2(RZONES_DESC_HD);
4929
4930 arr = kzalloc(alloc_len, GFP_ATOMIC | __GFP_NOWARN);
4931 if (!arr) {
4932 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
4933 INSUFF_RES_ASCQ);
4934 return check_condition_result;
4935 }
4936
4937 sdeb_read_lock(sip);
4938
4939 desc = arr + 64;
4940 for (lba = zs_lba; lba < sdebug_capacity;
4941 lba = zsp->z_start + zsp->z_size) {
4942 if (WARN_ONCE(zbc_zone(devip, lba) == zsp, "lba = %llu\n", lba))
4943 break;
4944 zsp = zbc_zone(devip, lba);
4945 switch (rep_opts) {
4946 case 0x00:
4947 /* All zones */
4948 break;
4949 case 0x01:
4950 /* Empty zones */
4951 if (zsp->z_cond != ZC1_EMPTY)
4952 continue;
4953 break;
4954 case 0x02:
4955 /* Implicit open zones */
4956 if (zsp->z_cond != ZC2_IMPLICIT_OPEN)
4957 continue;
4958 break;
4959 case 0x03:
4960 /* Explicit open zones */
4961 if (zsp->z_cond != ZC3_EXPLICIT_OPEN)
4962 continue;
4963 break;
4964 case 0x04:
4965 /* Closed zones */
4966 if (zsp->z_cond != ZC4_CLOSED)
4967 continue;
4968 break;
4969 case 0x05:
4970 /* Full zones */
4971 if (zsp->z_cond != ZC5_FULL)
4972 continue;
4973 break;
4974 case 0x06:
4975 case 0x07:
4976 case 0x10:
4977 /*
4978 * Read-only, offline, reset WP recommended are
4979 * not emulated: no zones to report;
4980 */
4981 continue;
4982 case 0x11:
4983 /* non-seq-resource set */
4984 if (!zsp->z_non_seq_resource)
4985 continue;
4986 break;
4987 case 0x3e:
4988 /* All zones except gap zones. */
4989 if (zbc_zone_is_gap(zsp))
4990 continue;
4991 break;
4992 case 0x3f:
4993 /* Not write pointer (conventional) zones */
4994 if (zbc_zone_is_seq(zsp))
4995 continue;
4996 break;
4997 default:
4998 mk_sense_buffer(scp, ILLEGAL_REQUEST,
4999 INVALID_FIELD_IN_CDB, 0);
5000 ret = check_condition_result;
5001 goto fini;
5002 }
5003
5004 if (nrz < rep_max_zones) {
5005 /* Fill zone descriptor */
5006 desc[0] = zsp->z_type;
5007 desc[1] = zsp->z_cond << 4;
5008 if (zsp->z_non_seq_resource)
5009 desc[1] |= 1 << 1;
5010 put_unaligned_be64((u64)zsp->z_size, desc + 8);
5011 put_unaligned_be64((u64)zsp->z_start, desc + 16);
5012 put_unaligned_be64((u64)zsp->z_wp, desc + 24);
5013 desc += 64;
5014 }
5015
5016 if (partial && nrz >= rep_max_zones)
5017 break;
5018
5019 nrz++;
5020 }
5021
5022 /* Report header */
5023 /* Zone list length. */
5024 put_unaligned_be32(nrz * RZONES_DESC_HD, arr + 0);
5025 /* Maximum LBA */
5026 put_unaligned_be64(sdebug_capacity - 1, arr + 8);
5027 /* Zone starting LBA granularity. */
5028 if (devip->zcap < devip->zsize)
5029 put_unaligned_be64(devip->zsize, arr + 16);
5030
5031 rep_len = (unsigned long)desc - (unsigned long)arr;
5032 ret = fill_from_dev_buffer(scp, arr, min_t(u32, alloc_len, rep_len));
5033
5034fini:
5035 sdeb_read_unlock(sip);
5036 kfree(arr);
5037 return ret;
5038}
5039
5040/* Logic transplanted from tcmu-runner, file_zbc.c */
5041static void zbc_open_all(struct sdebug_dev_info *devip)
5042{
5043 struct sdeb_zone_state *zsp = &devip->zstate[0];
5044 unsigned int i;
5045
5046 for (i = 0; i < devip->nr_zones; i++, zsp++) {
5047 if (zsp->z_cond == ZC4_CLOSED)
5048 zbc_open_zone(devip, &devip->zstate[i], true);
5049 }
5050}
5051
5052static int resp_open_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
5053{
5054 int res = 0;
5055 u64 z_id;
5056 enum sdebug_z_cond zc;
5057 u8 *cmd = scp->cmnd;
5058 struct sdeb_zone_state *zsp;
5059 bool all = cmd[14] & 0x01;
5060 struct sdeb_store_info *sip = devip2sip(devip, false);
5061
5062 if (!sdebug_dev_is_zoned(devip)) {
5063 mk_sense_invalid_opcode(scp);
5064 return check_condition_result;
5065 }
5066
5067 sdeb_write_lock(sip);
5068
5069 if (all) {
5070 /* Check if all closed zones can be open */
5071 if (devip->max_open &&
5072 devip->nr_exp_open + devip->nr_closed > devip->max_open) {
5073 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC,
5074 INSUFF_ZONE_ASCQ);
5075 res = check_condition_result;
5076 goto fini;
5077 }
5078 /* Open all closed zones */
5079 zbc_open_all(devip);
5080 goto fini;
5081 }
5082
5083 /* Open the specified zone */
5084 z_id = get_unaligned_be64(cmd + 2);
5085 if (z_id >= sdebug_capacity) {
5086 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
5087 res = check_condition_result;
5088 goto fini;
5089 }
5090
5091 zsp = zbc_zone(devip, z_id);
5092 if (z_id != zsp->z_start) {
5093 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5094 res = check_condition_result;
5095 goto fini;
5096 }
5097 if (zbc_zone_is_conv(zsp)) {
5098 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5099 res = check_condition_result;
5100 goto fini;
5101 }
5102
5103 zc = zsp->z_cond;
5104 if (zc == ZC3_EXPLICIT_OPEN || zc == ZC5_FULL)
5105 goto fini;
5106
5107 if (devip->max_open && devip->nr_exp_open >= devip->max_open) {
5108 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC,
5109 INSUFF_ZONE_ASCQ);
5110 res = check_condition_result;
5111 goto fini;
5112 }
5113
5114 zbc_open_zone(devip, zsp, true);
5115fini:
5116 sdeb_write_unlock(sip);
5117 return res;
5118}
5119
5120static void zbc_close_all(struct sdebug_dev_info *devip)
5121{
5122 unsigned int i;
5123
5124 for (i = 0; i < devip->nr_zones; i++)
5125 zbc_close_zone(devip, &devip->zstate[i]);
5126}
5127
5128static int resp_close_zone(struct scsi_cmnd *scp,
5129 struct sdebug_dev_info *devip)
5130{
5131 int res = 0;
5132 u64 z_id;
5133 u8 *cmd = scp->cmnd;
5134 struct sdeb_zone_state *zsp;
5135 bool all = cmd[14] & 0x01;
5136 struct sdeb_store_info *sip = devip2sip(devip, false);
5137
5138 if (!sdebug_dev_is_zoned(devip)) {
5139 mk_sense_invalid_opcode(scp);
5140 return check_condition_result;
5141 }
5142
5143 sdeb_write_lock(sip);
5144
5145 if (all) {
5146 zbc_close_all(devip);
5147 goto fini;
5148 }
5149
5150 /* Close specified zone */
5151 z_id = get_unaligned_be64(cmd + 2);
5152 if (z_id >= sdebug_capacity) {
5153 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
5154 res = check_condition_result;
5155 goto fini;
5156 }
5157
5158 zsp = zbc_zone(devip, z_id);
5159 if (z_id != zsp->z_start) {
5160 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5161 res = check_condition_result;
5162 goto fini;
5163 }
5164 if (zbc_zone_is_conv(zsp)) {
5165 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5166 res = check_condition_result;
5167 goto fini;
5168 }
5169
5170 zbc_close_zone(devip, zsp);
5171fini:
5172 sdeb_write_unlock(sip);
5173 return res;
5174}
5175
5176static void zbc_finish_zone(struct sdebug_dev_info *devip,
5177 struct sdeb_zone_state *zsp, bool empty)
5178{
5179 enum sdebug_z_cond zc = zsp->z_cond;
5180
5181 if (zc == ZC4_CLOSED || zc == ZC2_IMPLICIT_OPEN ||
5182 zc == ZC3_EXPLICIT_OPEN || (empty && zc == ZC1_EMPTY)) {
5183 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)
5184 zbc_close_zone(devip, zsp);
5185 if (zsp->z_cond == ZC4_CLOSED)
5186 devip->nr_closed--;
5187 zsp->z_wp = zsp->z_start + zsp->z_size;
5188 zsp->z_cond = ZC5_FULL;
5189 }
5190}
5191
5192static void zbc_finish_all(struct sdebug_dev_info *devip)
5193{
5194 unsigned int i;
5195
5196 for (i = 0; i < devip->nr_zones; i++)
5197 zbc_finish_zone(devip, &devip->zstate[i], false);
5198}
5199
5200static int resp_finish_zone(struct scsi_cmnd *scp,
5201 struct sdebug_dev_info *devip)
5202{
5203 struct sdeb_zone_state *zsp;
5204 int res = 0;
5205 u64 z_id;
5206 u8 *cmd = scp->cmnd;
5207 bool all = cmd[14] & 0x01;
5208 struct sdeb_store_info *sip = devip2sip(devip, false);
5209
5210 if (!sdebug_dev_is_zoned(devip)) {
5211 mk_sense_invalid_opcode(scp);
5212 return check_condition_result;
5213 }
5214
5215 sdeb_write_lock(sip);
5216
5217 if (all) {
5218 zbc_finish_all(devip);
5219 goto fini;
5220 }
5221
5222 /* Finish the specified zone */
5223 z_id = get_unaligned_be64(cmd + 2);
5224 if (z_id >= sdebug_capacity) {
5225 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
5226 res = check_condition_result;
5227 goto fini;
5228 }
5229
5230 zsp = zbc_zone(devip, z_id);
5231 if (z_id != zsp->z_start) {
5232 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5233 res = check_condition_result;
5234 goto fini;
5235 }
5236 if (zbc_zone_is_conv(zsp)) {
5237 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5238 res = check_condition_result;
5239 goto fini;
5240 }
5241
5242 zbc_finish_zone(devip, zsp, true);
5243fini:
5244 sdeb_write_unlock(sip);
5245 return res;
5246}
5247
5248static void zbc_rwp_zone(struct sdebug_dev_info *devip,
5249 struct sdeb_zone_state *zsp)
5250{
5251 enum sdebug_z_cond zc;
5252 struct sdeb_store_info *sip = devip2sip(devip, false);
5253
5254 if (!zbc_zone_is_seq(zsp))
5255 return;
5256
5257 zc = zsp->z_cond;
5258 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)
5259 zbc_close_zone(devip, zsp);
5260
5261 if (zsp->z_cond == ZC4_CLOSED)
5262 devip->nr_closed--;
5263
5264 if (zsp->z_wp > zsp->z_start)
5265 memset(sip->storep + zsp->z_start * sdebug_sector_size, 0,
5266 (zsp->z_wp - zsp->z_start) * sdebug_sector_size);
5267
5268 zsp->z_non_seq_resource = false;
5269 zsp->z_wp = zsp->z_start;
5270 zsp->z_cond = ZC1_EMPTY;
5271}
5272
5273static void zbc_rwp_all(struct sdebug_dev_info *devip)
5274{
5275 unsigned int i;
5276
5277 for (i = 0; i < devip->nr_zones; i++)
5278 zbc_rwp_zone(devip, &devip->zstate[i]);
5279}
5280
5281static int resp_rwp_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
5282{
5283 struct sdeb_zone_state *zsp;
5284 int res = 0;
5285 u64 z_id;
5286 u8 *cmd = scp->cmnd;
5287 bool all = cmd[14] & 0x01;
5288 struct sdeb_store_info *sip = devip2sip(devip, false);
5289
5290 if (!sdebug_dev_is_zoned(devip)) {
5291 mk_sense_invalid_opcode(scp);
5292 return check_condition_result;
5293 }
5294
5295 sdeb_write_lock(sip);
5296
5297 if (all) {
5298 zbc_rwp_all(devip);
5299 goto fini;
5300 }
5301
5302 z_id = get_unaligned_be64(cmd + 2);
5303 if (z_id >= sdebug_capacity) {
5304 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
5305 res = check_condition_result;
5306 goto fini;
5307 }
5308
5309 zsp = zbc_zone(devip, z_id);
5310 if (z_id != zsp->z_start) {
5311 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5312 res = check_condition_result;
5313 goto fini;
5314 }
5315 if (zbc_zone_is_conv(zsp)) {
5316 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5317 res = check_condition_result;
5318 goto fini;
5319 }
5320
5321 zbc_rwp_zone(devip, zsp);
5322fini:
5323 sdeb_write_unlock(sip);
5324 return res;
5325}
5326
5327static u32 get_tag(struct scsi_cmnd *cmnd)
5328{
5329 return blk_mq_unique_tag(scsi_cmd_to_rq(cmnd));
5330}
5331
5332/* Queued (deferred) command completions converge here. */
5333static void sdebug_q_cmd_complete(struct sdebug_defer *sd_dp)
5334{
5335 struct sdebug_queued_cmd *sqcp = container_of(sd_dp, struct sdebug_queued_cmd, sd_dp);
5336 unsigned long flags;
5337 struct scsi_cmnd *scp = sqcp->scmd;
5338 struct sdebug_scsi_cmd *sdsc;
5339 bool aborted;
5340
5341 if (sdebug_statistics) {
5342 atomic_inc(&sdebug_completions);
5343 if (raw_smp_processor_id() != sd_dp->issuing_cpu)
5344 atomic_inc(&sdebug_miss_cpus);
5345 }
5346
5347 if (!scp) {
5348 pr_err("scmd=NULL\n");
5349 goto out;
5350 }
5351
5352 sdsc = scsi_cmd_priv(scp);
5353 spin_lock_irqsave(&sdsc->lock, flags);
5354 aborted = sd_dp->aborted;
5355 if (unlikely(aborted))
5356 sd_dp->aborted = false;
5357 ASSIGN_QUEUED_CMD(scp, NULL);
5358
5359 spin_unlock_irqrestore(&sdsc->lock, flags);
5360
5361 if (aborted) {
5362 pr_info("bypassing scsi_done() due to aborted cmd, kicking-off EH\n");
5363 blk_abort_request(scsi_cmd_to_rq(scp));
5364 goto out;
5365 }
5366
5367 scsi_done(scp); /* callback to mid level */
5368out:
5369 sdebug_free_queued_cmd(sqcp);
5370}
5371
5372/* When high resolution timer goes off this function is called. */
5373static enum hrtimer_restart sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
5374{
5375 struct sdebug_defer *sd_dp = container_of(timer, struct sdebug_defer,
5376 hrt);
5377 sdebug_q_cmd_complete(sd_dp);
5378 return HRTIMER_NORESTART;
5379}
5380
5381/* When work queue schedules work, it calls this function. */
5382static void sdebug_q_cmd_wq_complete(struct work_struct *work)
5383{
5384 struct sdebug_defer *sd_dp = container_of(work, struct sdebug_defer,
5385 ew.work);
5386 sdebug_q_cmd_complete(sd_dp);
5387}
5388
5389static bool got_shared_uuid;
5390static uuid_t shared_uuid;
5391
5392static int sdebug_device_create_zones(struct sdebug_dev_info *devip)
5393{
5394 struct sdeb_zone_state *zsp;
5395 sector_t capacity = get_sdebug_capacity();
5396 sector_t conv_capacity;
5397 sector_t zstart = 0;
5398 unsigned int i;
5399
5400 /*
5401 * Set the zone size: if sdeb_zbc_zone_size_mb is not set, figure out
5402 * a zone size allowing for at least 4 zones on the device. Otherwise,
5403 * use the specified zone size checking that at least 2 zones can be
5404 * created for the device.
5405 */
5406 if (!sdeb_zbc_zone_size_mb) {
5407 devip->zsize = (DEF_ZBC_ZONE_SIZE_MB * SZ_1M)
5408 >> ilog2(sdebug_sector_size);
5409 while (capacity < devip->zsize << 2 && devip->zsize >= 2)
5410 devip->zsize >>= 1;
5411 if (devip->zsize < 2) {
5412 pr_err("Device capacity too small\n");
5413 return -EINVAL;
5414 }
5415 } else {
5416 if (!is_power_of_2(sdeb_zbc_zone_size_mb)) {
5417 pr_err("Zone size is not a power of 2\n");
5418 return -EINVAL;
5419 }
5420 devip->zsize = (sdeb_zbc_zone_size_mb * SZ_1M)
5421 >> ilog2(sdebug_sector_size);
5422 if (devip->zsize >= capacity) {
5423 pr_err("Zone size too large for device capacity\n");
5424 return -EINVAL;
5425 }
5426 }
5427
5428 devip->zsize_shift = ilog2(devip->zsize);
5429 devip->nr_zones = (capacity + devip->zsize - 1) >> devip->zsize_shift;
5430
5431 if (sdeb_zbc_zone_cap_mb == 0) {
5432 devip->zcap = devip->zsize;
5433 } else {
5434 devip->zcap = (sdeb_zbc_zone_cap_mb * SZ_1M) >>
5435 ilog2(sdebug_sector_size);
5436 if (devip->zcap > devip->zsize) {
5437 pr_err("Zone capacity too large\n");
5438 return -EINVAL;
5439 }
5440 }
5441
5442 conv_capacity = (sector_t)sdeb_zbc_nr_conv << devip->zsize_shift;
5443 if (conv_capacity >= capacity) {
5444 pr_err("Number of conventional zones too large\n");
5445 return -EINVAL;
5446 }
5447 devip->nr_conv_zones = sdeb_zbc_nr_conv;
5448 devip->nr_seq_zones = ALIGN(capacity - conv_capacity, devip->zsize) >>
5449 devip->zsize_shift;
5450 devip->nr_zones = devip->nr_conv_zones + devip->nr_seq_zones;
5451
5452 /* Add gap zones if zone capacity is smaller than the zone size */
5453 if (devip->zcap < devip->zsize)
5454 devip->nr_zones += devip->nr_seq_zones;
5455
5456 if (devip->zoned) {
5457 /* zbc_max_open_zones can be 0, meaning "not reported" */
5458 if (sdeb_zbc_max_open >= devip->nr_zones - 1)
5459 devip->max_open = (devip->nr_zones - 1) / 2;
5460 else
5461 devip->max_open = sdeb_zbc_max_open;
5462 }
5463
5464 devip->zstate = kcalloc(devip->nr_zones,
5465 sizeof(struct sdeb_zone_state), GFP_KERNEL);
5466 if (!devip->zstate)
5467 return -ENOMEM;
5468
5469 for (i = 0; i < devip->nr_zones; i++) {
5470 zsp = &devip->zstate[i];
5471
5472 zsp->z_start = zstart;
5473
5474 if (i < devip->nr_conv_zones) {
5475 zsp->z_type = ZBC_ZTYPE_CNV;
5476 zsp->z_cond = ZBC_NOT_WRITE_POINTER;
5477 zsp->z_wp = (sector_t)-1;
5478 zsp->z_size =
5479 min_t(u64, devip->zsize, capacity - zstart);
5480 } else if ((zstart & (devip->zsize - 1)) == 0) {
5481 if (devip->zoned)
5482 zsp->z_type = ZBC_ZTYPE_SWR;
5483 else
5484 zsp->z_type = ZBC_ZTYPE_SWP;
5485 zsp->z_cond = ZC1_EMPTY;
5486 zsp->z_wp = zsp->z_start;
5487 zsp->z_size =
5488 min_t(u64, devip->zcap, capacity - zstart);
5489 } else {
5490 zsp->z_type = ZBC_ZTYPE_GAP;
5491 zsp->z_cond = ZBC_NOT_WRITE_POINTER;
5492 zsp->z_wp = (sector_t)-1;
5493 zsp->z_size = min_t(u64, devip->zsize - devip->zcap,
5494 capacity - zstart);
5495 }
5496
5497 WARN_ON_ONCE((int)zsp->z_size <= 0);
5498 zstart += zsp->z_size;
5499 }
5500
5501 return 0;
5502}
5503
5504static struct sdebug_dev_info *sdebug_device_create(
5505 struct sdebug_host_info *sdbg_host, gfp_t flags)
5506{
5507 struct sdebug_dev_info *devip;
5508
5509 devip = kzalloc(sizeof(*devip), flags);
5510 if (devip) {
5511 if (sdebug_uuid_ctl == 1)
5512 uuid_gen(&devip->lu_name);
5513 else if (sdebug_uuid_ctl == 2) {
5514 if (got_shared_uuid)
5515 devip->lu_name = shared_uuid;
5516 else {
5517 uuid_gen(&shared_uuid);
5518 got_shared_uuid = true;
5519 devip->lu_name = shared_uuid;
5520 }
5521 }
5522 devip->sdbg_host = sdbg_host;
5523 if (sdeb_zbc_in_use) {
5524 devip->zoned = sdeb_zbc_model == BLK_ZONED_HM;
5525 if (sdebug_device_create_zones(devip)) {
5526 kfree(devip);
5527 return NULL;
5528 }
5529 } else {
5530 devip->zoned = false;
5531 }
5532 devip->create_ts = ktime_get_boottime();
5533 atomic_set(&devip->stopped, (sdeb_tur_ms_to_ready > 0 ? 2 : 0));
5534 spin_lock_init(&devip->list_lock);
5535 INIT_LIST_HEAD(&devip->inject_err_list);
5536 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
5537 }
5538 return devip;
5539}
5540
5541static struct sdebug_dev_info *find_build_dev_info(struct scsi_device *sdev)
5542{
5543 struct sdebug_host_info *sdbg_host;
5544 struct sdebug_dev_info *open_devip = NULL;
5545 struct sdebug_dev_info *devip;
5546
5547 sdbg_host = shost_to_sdebug_host(sdev->host);
5548
5549 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
5550 if ((devip->used) && (devip->channel == sdev->channel) &&
5551 (devip->target == sdev->id) &&
5552 (devip->lun == sdev->lun))
5553 return devip;
5554 else {
5555 if ((!devip->used) && (!open_devip))
5556 open_devip = devip;
5557 }
5558 }
5559 if (!open_devip) { /* try and make a new one */
5560 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
5561 if (!open_devip) {
5562 pr_err("out of memory at line %d\n", __LINE__);
5563 return NULL;
5564 }
5565 }
5566
5567 open_devip->channel = sdev->channel;
5568 open_devip->target = sdev->id;
5569 open_devip->lun = sdev->lun;
5570 open_devip->sdbg_host = sdbg_host;
5571 set_bit(SDEBUG_UA_POOCCUR, open_devip->uas_bm);
5572 open_devip->used = true;
5573 return open_devip;
5574}
5575
5576static int scsi_debug_slave_alloc(struct scsi_device *sdp)
5577{
5578 if (sdebug_verbose)
5579 pr_info("slave_alloc <%u %u %u %llu>\n",
5580 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
5581
5582 return 0;
5583}
5584
5585static int scsi_debug_slave_configure(struct scsi_device *sdp)
5586{
5587 struct sdebug_dev_info *devip =
5588 (struct sdebug_dev_info *)sdp->hostdata;
5589 struct dentry *dentry;
5590
5591 if (sdebug_verbose)
5592 pr_info("slave_configure <%u %u %u %llu>\n",
5593 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
5594 if (sdp->host->max_cmd_len != SDEBUG_MAX_CMD_LEN)
5595 sdp->host->max_cmd_len = SDEBUG_MAX_CMD_LEN;
5596 if (devip == NULL) {
5597 devip = find_build_dev_info(sdp);
5598 if (devip == NULL)
5599 return 1; /* no resources, will be marked offline */
5600 }
5601 sdp->hostdata = devip;
5602 if (sdebug_no_uld)
5603 sdp->no_uld_attach = 1;
5604 config_cdb_len(sdp);
5605
5606 if (sdebug_allow_restart)
5607 sdp->allow_restart = 1;
5608
5609 devip->debugfs_entry = debugfs_create_dir(dev_name(&sdp->sdev_dev),
5610 sdebug_debugfs_root);
5611 if (IS_ERR_OR_NULL(devip->debugfs_entry))
5612 pr_info("%s: failed to create debugfs directory for device %s\n",
5613 __func__, dev_name(&sdp->sdev_gendev));
5614
5615 dentry = debugfs_create_file("error", 0600, devip->debugfs_entry, sdp,
5616 &sdebug_error_fops);
5617 if (IS_ERR_OR_NULL(dentry))
5618 pr_info("%s: failed to create error file for device %s\n",
5619 __func__, dev_name(&sdp->sdev_gendev));
5620
5621 return 0;
5622}
5623
5624static void scsi_debug_slave_destroy(struct scsi_device *sdp)
5625{
5626 struct sdebug_dev_info *devip =
5627 (struct sdebug_dev_info *)sdp->hostdata;
5628 struct sdebug_err_inject *err;
5629
5630 if (sdebug_verbose)
5631 pr_info("slave_destroy <%u %u %u %llu>\n",
5632 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
5633
5634 if (!devip)
5635 return;
5636
5637 spin_lock(&devip->list_lock);
5638 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
5639 list_del_rcu(&err->list);
5640 call_rcu(&err->rcu, sdebug_err_free);
5641 }
5642 spin_unlock(&devip->list_lock);
5643
5644 debugfs_remove(devip->debugfs_entry);
5645
5646 /* make this slot available for re-use */
5647 devip->used = false;
5648 sdp->hostdata = NULL;
5649}
5650
5651/* Returns true if we require the queued memory to be freed by the caller. */
5652static bool stop_qc_helper(struct sdebug_defer *sd_dp,
5653 enum sdeb_defer_type defer_t)
5654{
5655 if (defer_t == SDEB_DEFER_HRT) {
5656 int res = hrtimer_try_to_cancel(&sd_dp->hrt);
5657
5658 switch (res) {
5659 case 0: /* Not active, it must have already run */
5660 case -1: /* -1 It's executing the CB */
5661 return false;
5662 case 1: /* Was active, we've now cancelled */
5663 default:
5664 return true;
5665 }
5666 } else if (defer_t == SDEB_DEFER_WQ) {
5667 /* Cancel if pending */
5668 if (cancel_work_sync(&sd_dp->ew.work))
5669 return true;
5670 /* Was not pending, so it must have run */
5671 return false;
5672 } else if (defer_t == SDEB_DEFER_POLL) {
5673 return true;
5674 }
5675
5676 return false;
5677}
5678
5679
5680static bool scsi_debug_stop_cmnd(struct scsi_cmnd *cmnd)
5681{
5682 enum sdeb_defer_type l_defer_t;
5683 struct sdebug_defer *sd_dp;
5684 struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmnd);
5685 struct sdebug_queued_cmd *sqcp = TO_QUEUED_CMD(cmnd);
5686
5687 lockdep_assert_held(&sdsc->lock);
5688
5689 if (!sqcp)
5690 return false;
5691 sd_dp = &sqcp->sd_dp;
5692 l_defer_t = READ_ONCE(sd_dp->defer_t);
5693 ASSIGN_QUEUED_CMD(cmnd, NULL);
5694
5695 if (stop_qc_helper(sd_dp, l_defer_t))
5696 sdebug_free_queued_cmd(sqcp);
5697
5698 return true;
5699}
5700
5701/*
5702 * Called from scsi_debug_abort() only, which is for timed-out cmd.
5703 */
5704static bool scsi_debug_abort_cmnd(struct scsi_cmnd *cmnd)
5705{
5706 struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmnd);
5707 unsigned long flags;
5708 bool res;
5709
5710 spin_lock_irqsave(&sdsc->lock, flags);
5711 res = scsi_debug_stop_cmnd(cmnd);
5712 spin_unlock_irqrestore(&sdsc->lock, flags);
5713
5714 return res;
5715}
5716
5717/*
5718 * All we can do is set the cmnd as internally aborted and wait for it to
5719 * finish. We cannot call scsi_done() as normal completion path may do that.
5720 */
5721static bool sdebug_stop_cmnd(struct request *rq, void *data)
5722{
5723 scsi_debug_abort_cmnd(blk_mq_rq_to_pdu(rq));
5724
5725 return true;
5726}
5727
5728/* Deletes (stops) timers or work queues of all queued commands */
5729static void stop_all_queued(void)
5730{
5731 struct sdebug_host_info *sdhp;
5732
5733 mutex_lock(&sdebug_host_list_mutex);
5734 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
5735 struct Scsi_Host *shost = sdhp->shost;
5736
5737 blk_mq_tagset_busy_iter(&shost->tag_set, sdebug_stop_cmnd, NULL);
5738 }
5739 mutex_unlock(&sdebug_host_list_mutex);
5740}
5741
5742static int sdebug_fail_abort(struct scsi_cmnd *cmnd)
5743{
5744 struct scsi_device *sdp = cmnd->device;
5745 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
5746 struct sdebug_err_inject *err;
5747 unsigned char *cmd = cmnd->cmnd;
5748 int ret = 0;
5749
5750 if (devip == NULL)
5751 return 0;
5752
5753 rcu_read_lock();
5754 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
5755 if (err->type == ERR_ABORT_CMD_FAILED &&
5756 (err->cmd == cmd[0] || err->cmd == 0xff)) {
5757 ret = !!err->cnt;
5758 if (err->cnt < 0)
5759 err->cnt++;
5760
5761 rcu_read_unlock();
5762 return ret;
5763 }
5764 }
5765 rcu_read_unlock();
5766
5767 return 0;
5768}
5769
5770static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
5771{
5772 bool ok = scsi_debug_abort_cmnd(SCpnt);
5773 u8 *cmd = SCpnt->cmnd;
5774 u8 opcode = cmd[0];
5775
5776 ++num_aborts;
5777
5778 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5779 sdev_printk(KERN_INFO, SCpnt->device,
5780 "%s: command%s found\n", __func__,
5781 ok ? "" : " not");
5782
5783 if (sdebug_fail_abort(SCpnt)) {
5784 scmd_printk(KERN_INFO, SCpnt, "fail abort command 0x%x\n",
5785 opcode);
5786 return FAILED;
5787 }
5788
5789 return SUCCESS;
5790}
5791
5792static bool scsi_debug_stop_all_queued_iter(struct request *rq, void *data)
5793{
5794 struct scsi_device *sdp = data;
5795 struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq);
5796
5797 if (scmd->device == sdp)
5798 scsi_debug_abort_cmnd(scmd);
5799
5800 return true;
5801}
5802
5803/* Deletes (stops) timers or work queues of all queued commands per sdev */
5804static void scsi_debug_stop_all_queued(struct scsi_device *sdp)
5805{
5806 struct Scsi_Host *shost = sdp->host;
5807
5808 blk_mq_tagset_busy_iter(&shost->tag_set,
5809 scsi_debug_stop_all_queued_iter, sdp);
5810}
5811
5812static int sdebug_fail_lun_reset(struct scsi_cmnd *cmnd)
5813{
5814 struct scsi_device *sdp = cmnd->device;
5815 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
5816 struct sdebug_err_inject *err;
5817 unsigned char *cmd = cmnd->cmnd;
5818 int ret = 0;
5819
5820 if (devip == NULL)
5821 return 0;
5822
5823 rcu_read_lock();
5824 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
5825 if (err->type == ERR_LUN_RESET_FAILED &&
5826 (err->cmd == cmd[0] || err->cmd == 0xff)) {
5827 ret = !!err->cnt;
5828 if (err->cnt < 0)
5829 err->cnt++;
5830
5831 rcu_read_unlock();
5832 return ret;
5833 }
5834 }
5835 rcu_read_unlock();
5836
5837 return 0;
5838}
5839
5840static int scsi_debug_device_reset(struct scsi_cmnd *SCpnt)
5841{
5842 struct scsi_device *sdp = SCpnt->device;
5843 struct sdebug_dev_info *devip = sdp->hostdata;
5844 u8 *cmd = SCpnt->cmnd;
5845 u8 opcode = cmd[0];
5846
5847 ++num_dev_resets;
5848
5849 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5850 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
5851
5852 scsi_debug_stop_all_queued(sdp);
5853 if (devip)
5854 set_bit(SDEBUG_UA_POR, devip->uas_bm);
5855
5856 if (sdebug_fail_lun_reset(SCpnt)) {
5857 scmd_printk(KERN_INFO, SCpnt, "fail lun reset 0x%x\n", opcode);
5858 return FAILED;
5859 }
5860
5861 return SUCCESS;
5862}
5863
5864static int sdebug_fail_target_reset(struct scsi_cmnd *cmnd)
5865{
5866 struct scsi_target *starget = scsi_target(cmnd->device);
5867 struct sdebug_target_info *targetip =
5868 (struct sdebug_target_info *)starget->hostdata;
5869
5870 if (targetip)
5871 return targetip->reset_fail;
5872
5873 return 0;
5874}
5875
5876static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
5877{
5878 struct scsi_device *sdp = SCpnt->device;
5879 struct sdebug_host_info *sdbg_host = shost_to_sdebug_host(sdp->host);
5880 struct sdebug_dev_info *devip;
5881 u8 *cmd = SCpnt->cmnd;
5882 u8 opcode = cmd[0];
5883 int k = 0;
5884
5885 ++num_target_resets;
5886 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5887 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
5888
5889 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
5890 if (devip->target == sdp->id) {
5891 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
5892 ++k;
5893 }
5894 }
5895
5896 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
5897 sdev_printk(KERN_INFO, sdp,
5898 "%s: %d device(s) found in target\n", __func__, k);
5899
5900 if (sdebug_fail_target_reset(SCpnt)) {
5901 scmd_printk(KERN_INFO, SCpnt, "fail target reset 0x%x\n",
5902 opcode);
5903 return FAILED;
5904 }
5905
5906 return SUCCESS;
5907}
5908
5909static int scsi_debug_bus_reset(struct scsi_cmnd *SCpnt)
5910{
5911 struct scsi_device *sdp = SCpnt->device;
5912 struct sdebug_host_info *sdbg_host = shost_to_sdebug_host(sdp->host);
5913 struct sdebug_dev_info *devip;
5914 int k = 0;
5915
5916 ++num_bus_resets;
5917
5918 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5919 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
5920
5921 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
5922 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
5923 ++k;
5924 }
5925
5926 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
5927 sdev_printk(KERN_INFO, sdp,
5928 "%s: %d device(s) found in host\n", __func__, k);
5929 return SUCCESS;
5930}
5931
5932static int scsi_debug_host_reset(struct scsi_cmnd *SCpnt)
5933{
5934 struct sdebug_host_info *sdbg_host;
5935 struct sdebug_dev_info *devip;
5936 int k = 0;
5937
5938 ++num_host_resets;
5939 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5940 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
5941 mutex_lock(&sdebug_host_list_mutex);
5942 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
5943 list_for_each_entry(devip, &sdbg_host->dev_info_list,
5944 dev_list) {
5945 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
5946 ++k;
5947 }
5948 }
5949 mutex_unlock(&sdebug_host_list_mutex);
5950 stop_all_queued();
5951 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
5952 sdev_printk(KERN_INFO, SCpnt->device,
5953 "%s: %d device(s) found\n", __func__, k);
5954 return SUCCESS;
5955}
5956
5957static void sdebug_build_parts(unsigned char *ramp, unsigned long store_size)
5958{
5959 struct msdos_partition *pp;
5960 int starts[SDEBUG_MAX_PARTS + 2], max_part_secs;
5961 int sectors_per_part, num_sectors, k;
5962 int heads_by_sects, start_sec, end_sec;
5963
5964 /* assume partition table already zeroed */
5965 if ((sdebug_num_parts < 1) || (store_size < 1048576))
5966 return;
5967 if (sdebug_num_parts > SDEBUG_MAX_PARTS) {
5968 sdebug_num_parts = SDEBUG_MAX_PARTS;
5969 pr_warn("reducing partitions to %d\n", SDEBUG_MAX_PARTS);
5970 }
5971 num_sectors = (int)get_sdebug_capacity();
5972 sectors_per_part = (num_sectors - sdebug_sectors_per)
5973 / sdebug_num_parts;
5974 heads_by_sects = sdebug_heads * sdebug_sectors_per;
5975 starts[0] = sdebug_sectors_per;
5976 max_part_secs = sectors_per_part;
5977 for (k = 1; k < sdebug_num_parts; ++k) {
5978 starts[k] = ((k * sectors_per_part) / heads_by_sects)
5979 * heads_by_sects;
5980 if (starts[k] - starts[k - 1] < max_part_secs)
5981 max_part_secs = starts[k] - starts[k - 1];
5982 }
5983 starts[sdebug_num_parts] = num_sectors;
5984 starts[sdebug_num_parts + 1] = 0;
5985
5986 ramp[510] = 0x55; /* magic partition markings */
5987 ramp[511] = 0xAA;
5988 pp = (struct msdos_partition *)(ramp + 0x1be);
5989 for (k = 0; starts[k + 1]; ++k, ++pp) {
5990 start_sec = starts[k];
5991 end_sec = starts[k] + max_part_secs - 1;
5992 pp->boot_ind = 0;
5993
5994 pp->cyl = start_sec / heads_by_sects;
5995 pp->head = (start_sec - (pp->cyl * heads_by_sects))
5996 / sdebug_sectors_per;
5997 pp->sector = (start_sec % sdebug_sectors_per) + 1;
5998
5999 pp->end_cyl = end_sec / heads_by_sects;
6000 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
6001 / sdebug_sectors_per;
6002 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
6003
6004 pp->start_sect = cpu_to_le32(start_sec);
6005 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
6006 pp->sys_ind = 0x83; /* plain Linux partition */
6007 }
6008}
6009
6010static void block_unblock_all_queues(bool block)
6011{
6012 struct sdebug_host_info *sdhp;
6013
6014 lockdep_assert_held(&sdebug_host_list_mutex);
6015
6016 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
6017 struct Scsi_Host *shost = sdhp->shost;
6018
6019 if (block)
6020 scsi_block_requests(shost);
6021 else
6022 scsi_unblock_requests(shost);
6023 }
6024}
6025
6026/* Adjust (by rounding down) the sdebug_cmnd_count so abs(every_nth)-1
6027 * commands will be processed normally before triggers occur.
6028 */
6029static void tweak_cmnd_count(void)
6030{
6031 int count, modulo;
6032
6033 modulo = abs(sdebug_every_nth);
6034 if (modulo < 2)
6035 return;
6036
6037 mutex_lock(&sdebug_host_list_mutex);
6038 block_unblock_all_queues(true);
6039 count = atomic_read(&sdebug_cmnd_count);
6040 atomic_set(&sdebug_cmnd_count, (count / modulo) * modulo);
6041 block_unblock_all_queues(false);
6042 mutex_unlock(&sdebug_host_list_mutex);
6043}
6044
6045static void clear_queue_stats(void)
6046{
6047 atomic_set(&sdebug_cmnd_count, 0);
6048 atomic_set(&sdebug_completions, 0);
6049 atomic_set(&sdebug_miss_cpus, 0);
6050 atomic_set(&sdebug_a_tsf, 0);
6051}
6052
6053static bool inject_on_this_cmd(void)
6054{
6055 if (sdebug_every_nth == 0)
6056 return false;
6057 return (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth)) == 0;
6058}
6059
6060#define INCLUSIVE_TIMING_MAX_NS 1000000 /* 1 millisecond */
6061
6062
6063void sdebug_free_queued_cmd(struct sdebug_queued_cmd *sqcp)
6064{
6065 if (sqcp)
6066 kmem_cache_free(queued_cmd_cache, sqcp);
6067}
6068
6069static struct sdebug_queued_cmd *sdebug_alloc_queued_cmd(struct scsi_cmnd *scmd)
6070{
6071 struct sdebug_queued_cmd *sqcp;
6072 struct sdebug_defer *sd_dp;
6073
6074 sqcp = kmem_cache_zalloc(queued_cmd_cache, GFP_ATOMIC);
6075 if (!sqcp)
6076 return NULL;
6077
6078 sd_dp = &sqcp->sd_dp;
6079
6080 hrtimer_init(&sd_dp->hrt, CLOCK_MONOTONIC, HRTIMER_MODE_REL_PINNED);
6081 sd_dp->hrt.function = sdebug_q_cmd_hrt_complete;
6082 INIT_WORK(&sd_dp->ew.work, sdebug_q_cmd_wq_complete);
6083
6084 sqcp->scmd = scmd;
6085
6086 return sqcp;
6087}
6088
6089/* Complete the processing of the thread that queued a SCSI command to this
6090 * driver. It either completes the command by calling cmnd_done() or
6091 * schedules a hr timer or work queue then returns 0. Returns
6092 * SCSI_MLQUEUE_HOST_BUSY if temporarily out of resources.
6093 */
6094static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
6095 int scsi_result,
6096 int (*pfp)(struct scsi_cmnd *,
6097 struct sdebug_dev_info *),
6098 int delta_jiff, int ndelay)
6099{
6100 struct request *rq = scsi_cmd_to_rq(cmnd);
6101 bool polled = rq->cmd_flags & REQ_POLLED;
6102 struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmnd);
6103 unsigned long flags;
6104 u64 ns_from_boot = 0;
6105 struct sdebug_queued_cmd *sqcp;
6106 struct scsi_device *sdp;
6107 struct sdebug_defer *sd_dp;
6108
6109 if (unlikely(devip == NULL)) {
6110 if (scsi_result == 0)
6111 scsi_result = DID_NO_CONNECT << 16;
6112 goto respond_in_thread;
6113 }
6114 sdp = cmnd->device;
6115
6116 if (delta_jiff == 0)
6117 goto respond_in_thread;
6118
6119
6120 if (unlikely(sdebug_every_nth && (SDEBUG_OPT_RARE_TSF & sdebug_opts) &&
6121 (scsi_result == 0))) {
6122 int num_in_q = scsi_device_busy(sdp);
6123 int qdepth = cmnd->device->queue_depth;
6124
6125 if ((num_in_q == qdepth) &&
6126 (atomic_inc_return(&sdebug_a_tsf) >=
6127 abs(sdebug_every_nth))) {
6128 atomic_set(&sdebug_a_tsf, 0);
6129 scsi_result = device_qfull_result;
6130
6131 if (unlikely(SDEBUG_OPT_Q_NOISE & sdebug_opts))
6132 sdev_printk(KERN_INFO, sdp, "%s: num_in_q=%d +1, <inject> status: TASK SET FULL\n",
6133 __func__, num_in_q);
6134 }
6135 }
6136
6137 sqcp = sdebug_alloc_queued_cmd(cmnd);
6138 if (!sqcp) {
6139 pr_err("%s no alloc\n", __func__);
6140 return SCSI_MLQUEUE_HOST_BUSY;
6141 }
6142 sd_dp = &sqcp->sd_dp;
6143
6144 if (polled)
6145 ns_from_boot = ktime_get_boottime_ns();
6146
6147 /* one of the resp_*() response functions is called here */
6148 cmnd->result = pfp ? pfp(cmnd, devip) : 0;
6149 if (cmnd->result & SDEG_RES_IMMED_MASK) {
6150 cmnd->result &= ~SDEG_RES_IMMED_MASK;
6151 delta_jiff = ndelay = 0;
6152 }
6153 if (cmnd->result == 0 && scsi_result != 0)
6154 cmnd->result = scsi_result;
6155 if (cmnd->result == 0 && unlikely(sdebug_opts & SDEBUG_OPT_TRANSPORT_ERR)) {
6156 if (atomic_read(&sdeb_inject_pending)) {
6157 mk_sense_buffer(cmnd, ABORTED_COMMAND, TRANSPORT_PROBLEM, ACK_NAK_TO);
6158 atomic_set(&sdeb_inject_pending, 0);
6159 cmnd->result = check_condition_result;
6160 }
6161 }
6162
6163 if (unlikely(sdebug_verbose && cmnd->result))
6164 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
6165 __func__, cmnd->result);
6166
6167 if (delta_jiff > 0 || ndelay > 0) {
6168 ktime_t kt;
6169
6170 if (delta_jiff > 0) {
6171 u64 ns = jiffies_to_nsecs(delta_jiff);
6172
6173 if (sdebug_random && ns < U32_MAX) {
6174 ns = get_random_u32_below((u32)ns);
6175 } else if (sdebug_random) {
6176 ns >>= 12; /* scale to 4 usec precision */
6177 if (ns < U32_MAX) /* over 4 hours max */
6178 ns = get_random_u32_below((u32)ns);
6179 ns <<= 12;
6180 }
6181 kt = ns_to_ktime(ns);
6182 } else { /* ndelay has a 4.2 second max */
6183 kt = sdebug_random ? get_random_u32_below((u32)ndelay) :
6184 (u32)ndelay;
6185 if (ndelay < INCLUSIVE_TIMING_MAX_NS) {
6186 u64 d = ktime_get_boottime_ns() - ns_from_boot;
6187
6188 if (kt <= d) { /* elapsed duration >= kt */
6189 /* call scsi_done() from this thread */
6190 sdebug_free_queued_cmd(sqcp);
6191 scsi_done(cmnd);
6192 return 0;
6193 }
6194 /* otherwise reduce kt by elapsed time */
6195 kt -= d;
6196 }
6197 }
6198 if (sdebug_statistics)
6199 sd_dp->issuing_cpu = raw_smp_processor_id();
6200 if (polled) {
6201 spin_lock_irqsave(&sdsc->lock, flags);
6202 sd_dp->cmpl_ts = ktime_add(ns_to_ktime(ns_from_boot), kt);
6203 ASSIGN_QUEUED_CMD(cmnd, sqcp);
6204 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_POLL);
6205 spin_unlock_irqrestore(&sdsc->lock, flags);
6206 } else {
6207 /* schedule the invocation of scsi_done() for a later time */
6208 spin_lock_irqsave(&sdsc->lock, flags);
6209 ASSIGN_QUEUED_CMD(cmnd, sqcp);
6210 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_HRT);
6211 hrtimer_start(&sd_dp->hrt, kt, HRTIMER_MODE_REL_PINNED);
6212 /*
6213 * The completion handler will try to grab sqcp->lock,
6214 * so there is no chance that the completion handler
6215 * will call scsi_done() until we release the lock
6216 * here (so ok to keep referencing sdsc).
6217 */
6218 spin_unlock_irqrestore(&sdsc->lock, flags);
6219 }
6220 } else { /* jdelay < 0, use work queue */
6221 if (unlikely((sdebug_opts & SDEBUG_OPT_CMD_ABORT) &&
6222 atomic_read(&sdeb_inject_pending))) {
6223 sd_dp->aborted = true;
6224 atomic_set(&sdeb_inject_pending, 0);
6225 sdev_printk(KERN_INFO, sdp, "abort request tag=%#x\n",
6226 blk_mq_unique_tag_to_tag(get_tag(cmnd)));
6227 }
6228
6229 if (sdebug_statistics)
6230 sd_dp->issuing_cpu = raw_smp_processor_id();
6231 if (polled) {
6232 spin_lock_irqsave(&sdsc->lock, flags);
6233 ASSIGN_QUEUED_CMD(cmnd, sqcp);
6234 sd_dp->cmpl_ts = ns_to_ktime(ns_from_boot);
6235 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_POLL);
6236 spin_unlock_irqrestore(&sdsc->lock, flags);
6237 } else {
6238 spin_lock_irqsave(&sdsc->lock, flags);
6239 ASSIGN_QUEUED_CMD(cmnd, sqcp);
6240 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_WQ);
6241 schedule_work(&sd_dp->ew.work);
6242 spin_unlock_irqrestore(&sdsc->lock, flags);
6243 }
6244 }
6245
6246 return 0;
6247
6248respond_in_thread: /* call back to mid-layer using invocation thread */
6249 cmnd->result = pfp != NULL ? pfp(cmnd, devip) : 0;
6250 cmnd->result &= ~SDEG_RES_IMMED_MASK;
6251 if (cmnd->result == 0 && scsi_result != 0)
6252 cmnd->result = scsi_result;
6253 scsi_done(cmnd);
6254 return 0;
6255}
6256
6257/* Note: The following macros create attribute files in the
6258 /sys/module/scsi_debug/parameters directory. Unfortunately this
6259 driver is unaware of a change and cannot trigger auxiliary actions
6260 as it can when the corresponding attribute in the
6261 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
6262 */
6263module_param_named(add_host, sdebug_add_host, int, S_IRUGO | S_IWUSR);
6264module_param_named(ato, sdebug_ato, int, S_IRUGO);
6265module_param_named(cdb_len, sdebug_cdb_len, int, 0644);
6266module_param_named(clustering, sdebug_clustering, bool, S_IRUGO | S_IWUSR);
6267module_param_named(delay, sdebug_jdelay, int, S_IRUGO | S_IWUSR);
6268module_param_named(dev_size_mb, sdebug_dev_size_mb, int, S_IRUGO);
6269module_param_named(dif, sdebug_dif, int, S_IRUGO);
6270module_param_named(dix, sdebug_dix, int, S_IRUGO);
6271module_param_named(dsense, sdebug_dsense, int, S_IRUGO | S_IWUSR);
6272module_param_named(every_nth, sdebug_every_nth, int, S_IRUGO | S_IWUSR);
6273module_param_named(fake_rw, sdebug_fake_rw, int, S_IRUGO | S_IWUSR);
6274module_param_named(guard, sdebug_guard, uint, S_IRUGO);
6275module_param_named(host_lock, sdebug_host_lock, bool, S_IRUGO | S_IWUSR);
6276module_param_named(host_max_queue, sdebug_host_max_queue, int, S_IRUGO);
6277module_param_string(inq_product, sdebug_inq_product_id,
6278 sizeof(sdebug_inq_product_id), S_IRUGO | S_IWUSR);
6279module_param_string(inq_rev, sdebug_inq_product_rev,
6280 sizeof(sdebug_inq_product_rev), S_IRUGO | S_IWUSR);
6281module_param_string(inq_vendor, sdebug_inq_vendor_id,
6282 sizeof(sdebug_inq_vendor_id), S_IRUGO | S_IWUSR);
6283module_param_named(lbprz, sdebug_lbprz, int, S_IRUGO);
6284module_param_named(lbpu, sdebug_lbpu, int, S_IRUGO);
6285module_param_named(lbpws, sdebug_lbpws, int, S_IRUGO);
6286module_param_named(lbpws10, sdebug_lbpws10, int, S_IRUGO);
6287module_param_named(lowest_aligned, sdebug_lowest_aligned, int, S_IRUGO);
6288module_param_named(lun_format, sdebug_lun_am_i, int, S_IRUGO | S_IWUSR);
6289module_param_named(max_luns, sdebug_max_luns, int, S_IRUGO | S_IWUSR);
6290module_param_named(max_queue, sdebug_max_queue, int, S_IRUGO | S_IWUSR);
6291module_param_named(medium_error_count, sdebug_medium_error_count, int,
6292 S_IRUGO | S_IWUSR);
6293module_param_named(medium_error_start, sdebug_medium_error_start, int,
6294 S_IRUGO | S_IWUSR);
6295module_param_named(ndelay, sdebug_ndelay, int, S_IRUGO | S_IWUSR);
6296module_param_named(no_lun_0, sdebug_no_lun_0, int, S_IRUGO | S_IWUSR);
6297module_param_named(no_rwlock, sdebug_no_rwlock, bool, S_IRUGO | S_IWUSR);
6298module_param_named(no_uld, sdebug_no_uld, int, S_IRUGO);
6299module_param_named(num_parts, sdebug_num_parts, int, S_IRUGO);
6300module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR);
6301module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO);
6302module_param_named(opt_xferlen_exp, sdebug_opt_xferlen_exp, int, S_IRUGO);
6303module_param_named(opts, sdebug_opts, int, S_IRUGO | S_IWUSR);
6304module_param_named(per_host_store, sdebug_per_host_store, bool,
6305 S_IRUGO | S_IWUSR);
6306module_param_named(physblk_exp, sdebug_physblk_exp, int, S_IRUGO);
6307module_param_named(ptype, sdebug_ptype, int, S_IRUGO | S_IWUSR);
6308module_param_named(random, sdebug_random, bool, S_IRUGO | S_IWUSR);
6309module_param_named(removable, sdebug_removable, bool, S_IRUGO | S_IWUSR);
6310module_param_named(scsi_level, sdebug_scsi_level, int, S_IRUGO);
6311module_param_named(sector_size, sdebug_sector_size, int, S_IRUGO);
6312module_param_named(statistics, sdebug_statistics, bool, S_IRUGO | S_IWUSR);
6313module_param_named(strict, sdebug_strict, bool, S_IRUGO | S_IWUSR);
6314module_param_named(submit_queues, submit_queues, int, S_IRUGO);
6315module_param_named(poll_queues, poll_queues, int, S_IRUGO);
6316module_param_named(tur_ms_to_ready, sdeb_tur_ms_to_ready, int, S_IRUGO);
6317module_param_named(unmap_alignment, sdebug_unmap_alignment, int, S_IRUGO);
6318module_param_named(unmap_granularity, sdebug_unmap_granularity, int, S_IRUGO);
6319module_param_named(unmap_max_blocks, sdebug_unmap_max_blocks, int, S_IRUGO);
6320module_param_named(unmap_max_desc, sdebug_unmap_max_desc, int, S_IRUGO);
6321module_param_named(uuid_ctl, sdebug_uuid_ctl, int, S_IRUGO);
6322module_param_named(virtual_gb, sdebug_virtual_gb, int, S_IRUGO | S_IWUSR);
6323module_param_named(vpd_use_hostno, sdebug_vpd_use_hostno, int,
6324 S_IRUGO | S_IWUSR);
6325module_param_named(wp, sdebug_wp, bool, S_IRUGO | S_IWUSR);
6326module_param_named(write_same_length, sdebug_write_same_length, int,
6327 S_IRUGO | S_IWUSR);
6328module_param_named(zbc, sdeb_zbc_model_s, charp, S_IRUGO);
6329module_param_named(zone_cap_mb, sdeb_zbc_zone_cap_mb, int, S_IRUGO);
6330module_param_named(zone_max_open, sdeb_zbc_max_open, int, S_IRUGO);
6331module_param_named(zone_nr_conv, sdeb_zbc_nr_conv, int, S_IRUGO);
6332module_param_named(zone_size_mb, sdeb_zbc_zone_size_mb, int, S_IRUGO);
6333module_param_named(allow_restart, sdebug_allow_restart, bool, S_IRUGO | S_IWUSR);
6334
6335MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
6336MODULE_DESCRIPTION("SCSI debug adapter driver");
6337MODULE_LICENSE("GPL");
6338MODULE_VERSION(SDEBUG_VERSION);
6339
6340MODULE_PARM_DESC(add_host, "add n hosts, in sysfs if negative remove host(s) (def=1)");
6341MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
6342MODULE_PARM_DESC(cdb_len, "suggest CDB lengths to drivers (def=10)");
6343MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
6344MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
6345MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)");
6346MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
6347MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
6348MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
6349MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
6350MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
6351MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
6352MODULE_PARM_DESC(host_lock, "host_lock is ignored (def=0)");
6353MODULE_PARM_DESC(host_max_queue,
6354 "host max # of queued cmds (0 to max(def) [max_queue fixed equal for !0])");
6355MODULE_PARM_DESC(inq_product, "SCSI INQUIRY product string (def=\"scsi_debug\")");
6356MODULE_PARM_DESC(inq_rev, "SCSI INQUIRY revision string (def=\""
6357 SDEBUG_VERSION "\")");
6358MODULE_PARM_DESC(inq_vendor, "SCSI INQUIRY vendor string (def=\"Linux\")");
6359MODULE_PARM_DESC(lbprz,
6360 "on read unmapped LBs return 0 when 1 (def), return 0xff when 2");
6361MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
6362MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
6363MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
6364MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
6365MODULE_PARM_DESC(lun_format, "LUN format: 0->peripheral (def); 1 --> flat address method");
6366MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
6367MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
6368MODULE_PARM_DESC(medium_error_count, "count of sectors to return follow on MEDIUM error");
6369MODULE_PARM_DESC(medium_error_start, "starting sector number to return MEDIUM error");
6370MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
6371MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
6372MODULE_PARM_DESC(no_rwlock, "don't protect user data reads+writes (def=0)");
6373MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
6374MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
6375MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
6376MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)");
6377MODULE_PARM_DESC(opt_xferlen_exp, "optimal transfer length granularity exponent (def=physblk_exp)");
6378MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
6379MODULE_PARM_DESC(per_host_store, "If set, next positive add_host will get new store (def=0)");
6380MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
6381MODULE_PARM_DESC(poll_queues, "support for iouring iopoll queues (1 to max(submit_queues - 1))");
6382MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
6383MODULE_PARM_DESC(random, "If set, uniformly randomize command duration between 0 and delay_in_ns");
6384MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
6385MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=7[SPC-5])");
6386MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
6387MODULE_PARM_DESC(statistics, "collect statistics on commands, queues (def=0)");
6388MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)");
6389MODULE_PARM_DESC(submit_queues, "support for block multi-queue (def=1)");
6390MODULE_PARM_DESC(tur_ms_to_ready, "TEST UNIT READY millisecs before initial good status (def=0)");
6391MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
6392MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
6393MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
6394MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
6395MODULE_PARM_DESC(uuid_ctl,
6396 "1->use uuid for lu name, 0->don't, 2->all use same (def=0)");
6397MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)");
6398MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
6399MODULE_PARM_DESC(wp, "Write Protect (def=0)");
6400MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
6401MODULE_PARM_DESC(zbc, "'none' [0]; 'aware' [1]; 'managed' [2] (def=0). Can have 'host-' prefix");
6402MODULE_PARM_DESC(zone_cap_mb, "Zone capacity in MiB (def=zone size)");
6403MODULE_PARM_DESC(zone_max_open, "Maximum number of open zones; [0] for no limit (def=auto)");
6404MODULE_PARM_DESC(zone_nr_conv, "Number of conventional zones (def=1)");
6405MODULE_PARM_DESC(zone_size_mb, "Zone size in MiB (def=auto)");
6406MODULE_PARM_DESC(allow_restart, "Set scsi_device's allow_restart flag(def=0)");
6407
6408#define SDEBUG_INFO_LEN 256
6409static char sdebug_info[SDEBUG_INFO_LEN];
6410
6411static const char *scsi_debug_info(struct Scsi_Host *shp)
6412{
6413 int k;
6414
6415 k = scnprintf(sdebug_info, SDEBUG_INFO_LEN, "%s: version %s [%s]\n",
6416 my_name, SDEBUG_VERSION, sdebug_version_date);
6417 if (k >= (SDEBUG_INFO_LEN - 1))
6418 return sdebug_info;
6419 scnprintf(sdebug_info + k, SDEBUG_INFO_LEN - k,
6420 " dev_size_mb=%d, opts=0x%x, submit_queues=%d, %s=%d",
6421 sdebug_dev_size_mb, sdebug_opts, submit_queues,
6422 "statistics", (int)sdebug_statistics);
6423 return sdebug_info;
6424}
6425
6426/* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */
6427static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer,
6428 int length)
6429{
6430 char arr[16];
6431 int opts;
6432 int minLen = length > 15 ? 15 : length;
6433
6434 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
6435 return -EACCES;
6436 memcpy(arr, buffer, minLen);
6437 arr[minLen] = '\0';
6438 if (1 != sscanf(arr, "%d", &opts))
6439 return -EINVAL;
6440 sdebug_opts = opts;
6441 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
6442 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
6443 if (sdebug_every_nth != 0)
6444 tweak_cmnd_count();
6445 return length;
6446}
6447
6448struct sdebug_submit_queue_data {
6449 int *first;
6450 int *last;
6451 int queue_num;
6452};
6453
6454static bool sdebug_submit_queue_iter(struct request *rq, void *opaque)
6455{
6456 struct sdebug_submit_queue_data *data = opaque;
6457 u32 unique_tag = blk_mq_unique_tag(rq);
6458 u16 hwq = blk_mq_unique_tag_to_hwq(unique_tag);
6459 u16 tag = blk_mq_unique_tag_to_tag(unique_tag);
6460 int queue_num = data->queue_num;
6461
6462 if (hwq != queue_num)
6463 return true;
6464
6465 /* Rely on iter'ing in ascending tag order */
6466 if (*data->first == -1)
6467 *data->first = *data->last = tag;
6468 else
6469 *data->last = tag;
6470
6471 return true;
6472}
6473
6474/* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the
6475 * same for each scsi_debug host (if more than one). Some of the counters
6476 * output are not atomics so might be inaccurate in a busy system. */
6477static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
6478{
6479 struct sdebug_host_info *sdhp;
6480 int j;
6481
6482 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n",
6483 SDEBUG_VERSION, sdebug_version_date);
6484 seq_printf(m, "num_tgts=%d, %ssize=%d MB, opts=0x%x, every_nth=%d\n",
6485 sdebug_num_tgts, "shared (ram) ", sdebug_dev_size_mb,
6486 sdebug_opts, sdebug_every_nth);
6487 seq_printf(m, "delay=%d, ndelay=%d, max_luns=%d, sector_size=%d %s\n",
6488 sdebug_jdelay, sdebug_ndelay, sdebug_max_luns,
6489 sdebug_sector_size, "bytes");
6490 seq_printf(m, "cylinders=%d, heads=%d, sectors=%d, command aborts=%d\n",
6491 sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per,
6492 num_aborts);
6493 seq_printf(m, "RESETs: device=%d, target=%d, bus=%d, host=%d\n",
6494 num_dev_resets, num_target_resets, num_bus_resets,
6495 num_host_resets);
6496 seq_printf(m, "dix_reads=%d, dix_writes=%d, dif_errors=%d\n",
6497 dix_reads, dix_writes, dif_errors);
6498 seq_printf(m, "usec_in_jiffy=%lu, statistics=%d\n", TICK_NSEC / 1000,
6499 sdebug_statistics);
6500 seq_printf(m, "cmnd_count=%d, completions=%d, %s=%d, a_tsf=%d, mq_polls=%d\n",
6501 atomic_read(&sdebug_cmnd_count),
6502 atomic_read(&sdebug_completions),
6503 "miss_cpus", atomic_read(&sdebug_miss_cpus),
6504 atomic_read(&sdebug_a_tsf),
6505 atomic_read(&sdeb_mq_poll_count));
6506
6507 seq_printf(m, "submit_queues=%d\n", submit_queues);
6508 for (j = 0; j < submit_queues; ++j) {
6509 int f = -1, l = -1;
6510 struct sdebug_submit_queue_data data = {
6511 .queue_num = j,
6512 .first = &f,
6513 .last = &l,
6514 };
6515 seq_printf(m, " queue %d:\n", j);
6516 blk_mq_tagset_busy_iter(&host->tag_set, sdebug_submit_queue_iter,
6517 &data);
6518 if (f >= 0) {
6519 seq_printf(m, " in_use_bm BUSY: %s: %d,%d\n",
6520 "first,last bits", f, l);
6521 }
6522 }
6523
6524 seq_printf(m, "this host_no=%d\n", host->host_no);
6525 if (!xa_empty(per_store_ap)) {
6526 bool niu;
6527 int idx;
6528 unsigned long l_idx;
6529 struct sdeb_store_info *sip;
6530
6531 seq_puts(m, "\nhost list:\n");
6532 j = 0;
6533 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
6534 idx = sdhp->si_idx;
6535 seq_printf(m, " %d: host_no=%d, si_idx=%d\n", j,
6536 sdhp->shost->host_no, idx);
6537 ++j;
6538 }
6539 seq_printf(m, "\nper_store array [most_recent_idx=%d]:\n",
6540 sdeb_most_recent_idx);
6541 j = 0;
6542 xa_for_each(per_store_ap, l_idx, sip) {
6543 niu = xa_get_mark(per_store_ap, l_idx,
6544 SDEB_XA_NOT_IN_USE);
6545 idx = (int)l_idx;
6546 seq_printf(m, " %d: idx=%d%s\n", j, idx,
6547 (niu ? " not_in_use" : ""));
6548 ++j;
6549 }
6550 }
6551 return 0;
6552}
6553
6554static ssize_t delay_show(struct device_driver *ddp, char *buf)
6555{
6556 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_jdelay);
6557}
6558/* Returns -EBUSY if jdelay is being changed and commands are queued. The unit
6559 * of delay is jiffies.
6560 */
6561static ssize_t delay_store(struct device_driver *ddp, const char *buf,
6562 size_t count)
6563{
6564 int jdelay, res;
6565
6566 if (count > 0 && sscanf(buf, "%d", &jdelay) == 1) {
6567 res = count;
6568 if (sdebug_jdelay != jdelay) {
6569 struct sdebug_host_info *sdhp;
6570
6571 mutex_lock(&sdebug_host_list_mutex);
6572 block_unblock_all_queues(true);
6573
6574 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
6575 struct Scsi_Host *shost = sdhp->shost;
6576
6577 if (scsi_host_busy(shost)) {
6578 res = -EBUSY; /* queued commands */
6579 break;
6580 }
6581 }
6582 if (res > 0) {
6583 sdebug_jdelay = jdelay;
6584 sdebug_ndelay = 0;
6585 }
6586 block_unblock_all_queues(false);
6587 mutex_unlock(&sdebug_host_list_mutex);
6588 }
6589 return res;
6590 }
6591 return -EINVAL;
6592}
6593static DRIVER_ATTR_RW(delay);
6594
6595static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
6596{
6597 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ndelay);
6598}
6599/* Returns -EBUSY if ndelay is being changed and commands are queued */
6600/* If > 0 and accepted then sdebug_jdelay is set to JDELAY_OVERRIDDEN */
6601static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
6602 size_t count)
6603{
6604 int ndelay, res;
6605
6606 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
6607 (ndelay >= 0) && (ndelay < (1000 * 1000 * 1000))) {
6608 res = count;
6609 if (sdebug_ndelay != ndelay) {
6610 struct sdebug_host_info *sdhp;
6611
6612 mutex_lock(&sdebug_host_list_mutex);
6613 block_unblock_all_queues(true);
6614
6615 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
6616 struct Scsi_Host *shost = sdhp->shost;
6617
6618 if (scsi_host_busy(shost)) {
6619 res = -EBUSY; /* queued commands */
6620 break;
6621 }
6622 }
6623
6624 if (res > 0) {
6625 sdebug_ndelay = ndelay;
6626 sdebug_jdelay = ndelay ? JDELAY_OVERRIDDEN
6627 : DEF_JDELAY;
6628 }
6629 block_unblock_all_queues(false);
6630 mutex_unlock(&sdebug_host_list_mutex);
6631 }
6632 return res;
6633 }
6634 return -EINVAL;
6635}
6636static DRIVER_ATTR_RW(ndelay);
6637
6638static ssize_t opts_show(struct device_driver *ddp, char *buf)
6639{
6640 return scnprintf(buf, PAGE_SIZE, "0x%x\n", sdebug_opts);
6641}
6642
6643static ssize_t opts_store(struct device_driver *ddp, const char *buf,
6644 size_t count)
6645{
6646 int opts;
6647 char work[20];
6648
6649 if (sscanf(buf, "%10s", work) == 1) {
6650 if (strncasecmp(work, "0x", 2) == 0) {
6651 if (kstrtoint(work + 2, 16, &opts) == 0)
6652 goto opts_done;
6653 } else {
6654 if (kstrtoint(work, 10, &opts) == 0)
6655 goto opts_done;
6656 }
6657 }
6658 return -EINVAL;
6659opts_done:
6660 sdebug_opts = opts;
6661 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
6662 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
6663 tweak_cmnd_count();
6664 return count;
6665}
6666static DRIVER_ATTR_RW(opts);
6667
6668static ssize_t ptype_show(struct device_driver *ddp, char *buf)
6669{
6670 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ptype);
6671}
6672static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
6673 size_t count)
6674{
6675 int n;
6676
6677 /* Cannot change from or to TYPE_ZBC with sysfs */
6678 if (sdebug_ptype == TYPE_ZBC)
6679 return -EINVAL;
6680
6681 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6682 if (n == TYPE_ZBC)
6683 return -EINVAL;
6684 sdebug_ptype = n;
6685 return count;
6686 }
6687 return -EINVAL;
6688}
6689static DRIVER_ATTR_RW(ptype);
6690
6691static ssize_t dsense_show(struct device_driver *ddp, char *buf)
6692{
6693 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dsense);
6694}
6695static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
6696 size_t count)
6697{
6698 int n;
6699
6700 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6701 sdebug_dsense = n;
6702 return count;
6703 }
6704 return -EINVAL;
6705}
6706static DRIVER_ATTR_RW(dsense);
6707
6708static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
6709{
6710 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_fake_rw);
6711}
6712static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
6713 size_t count)
6714{
6715 int n, idx;
6716
6717 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6718 bool want_store = (n == 0);
6719 struct sdebug_host_info *sdhp;
6720
6721 n = (n > 0);
6722 sdebug_fake_rw = (sdebug_fake_rw > 0);
6723 if (sdebug_fake_rw == n)
6724 return count; /* not transitioning so do nothing */
6725
6726 if (want_store) { /* 1 --> 0 transition, set up store */
6727 if (sdeb_first_idx < 0) {
6728 idx = sdebug_add_store();
6729 if (idx < 0)
6730 return idx;
6731 } else {
6732 idx = sdeb_first_idx;
6733 xa_clear_mark(per_store_ap, idx,
6734 SDEB_XA_NOT_IN_USE);
6735 }
6736 /* make all hosts use same store */
6737 list_for_each_entry(sdhp, &sdebug_host_list,
6738 host_list) {
6739 if (sdhp->si_idx != idx) {
6740 xa_set_mark(per_store_ap, sdhp->si_idx,
6741 SDEB_XA_NOT_IN_USE);
6742 sdhp->si_idx = idx;
6743 }
6744 }
6745 sdeb_most_recent_idx = idx;
6746 } else { /* 0 --> 1 transition is trigger for shrink */
6747 sdebug_erase_all_stores(true /* apart from first */);
6748 }
6749 sdebug_fake_rw = n;
6750 return count;
6751 }
6752 return -EINVAL;
6753}
6754static DRIVER_ATTR_RW(fake_rw);
6755
6756static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
6757{
6758 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_lun_0);
6759}
6760static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
6761 size_t count)
6762{
6763 int n;
6764
6765 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6766 sdebug_no_lun_0 = n;
6767 return count;
6768 }
6769 return -EINVAL;
6770}
6771static DRIVER_ATTR_RW(no_lun_0);
6772
6773static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
6774{
6775 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_tgts);
6776}
6777static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
6778 size_t count)
6779{
6780 int n;
6781
6782 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6783 sdebug_num_tgts = n;
6784 sdebug_max_tgts_luns();
6785 return count;
6786 }
6787 return -EINVAL;
6788}
6789static DRIVER_ATTR_RW(num_tgts);
6790
6791static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
6792{
6793 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dev_size_mb);
6794}
6795static DRIVER_ATTR_RO(dev_size_mb);
6796
6797static ssize_t per_host_store_show(struct device_driver *ddp, char *buf)
6798{
6799 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_per_host_store);
6800}
6801
6802static ssize_t per_host_store_store(struct device_driver *ddp, const char *buf,
6803 size_t count)
6804{
6805 bool v;
6806
6807 if (kstrtobool(buf, &v))
6808 return -EINVAL;
6809
6810 sdebug_per_host_store = v;
6811 return count;
6812}
6813static DRIVER_ATTR_RW(per_host_store);
6814
6815static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
6816{
6817 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_parts);
6818}
6819static DRIVER_ATTR_RO(num_parts);
6820
6821static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
6822{
6823 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_every_nth);
6824}
6825static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
6826 size_t count)
6827{
6828 int nth;
6829 char work[20];
6830
6831 if (sscanf(buf, "%10s", work) == 1) {
6832 if (strncasecmp(work, "0x", 2) == 0) {
6833 if (kstrtoint(work + 2, 16, &nth) == 0)
6834 goto every_nth_done;
6835 } else {
6836 if (kstrtoint(work, 10, &nth) == 0)
6837 goto every_nth_done;
6838 }
6839 }
6840 return -EINVAL;
6841
6842every_nth_done:
6843 sdebug_every_nth = nth;
6844 if (nth && !sdebug_statistics) {
6845 pr_info("every_nth needs statistics=1, set it\n");
6846 sdebug_statistics = true;
6847 }
6848 tweak_cmnd_count();
6849 return count;
6850}
6851static DRIVER_ATTR_RW(every_nth);
6852
6853static ssize_t lun_format_show(struct device_driver *ddp, char *buf)
6854{
6855 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_lun_am);
6856}
6857static ssize_t lun_format_store(struct device_driver *ddp, const char *buf,
6858 size_t count)
6859{
6860 int n;
6861 bool changed;
6862
6863 if (kstrtoint(buf, 0, &n))
6864 return -EINVAL;
6865 if (n >= 0) {
6866 if (n > (int)SAM_LUN_AM_FLAT) {
6867 pr_warn("only LUN address methods 0 and 1 are supported\n");
6868 return -EINVAL;
6869 }
6870 changed = ((int)sdebug_lun_am != n);
6871 sdebug_lun_am = n;
6872 if (changed && sdebug_scsi_level >= 5) { /* >= SPC-3 */
6873 struct sdebug_host_info *sdhp;
6874 struct sdebug_dev_info *dp;
6875
6876 mutex_lock(&sdebug_host_list_mutex);
6877 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
6878 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
6879 set_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
6880 }
6881 }
6882 mutex_unlock(&sdebug_host_list_mutex);
6883 }
6884 return count;
6885 }
6886 return -EINVAL;
6887}
6888static DRIVER_ATTR_RW(lun_format);
6889
6890static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
6891{
6892 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_luns);
6893}
6894static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
6895 size_t count)
6896{
6897 int n;
6898 bool changed;
6899
6900 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6901 if (n > 256) {
6902 pr_warn("max_luns can be no more than 256\n");
6903 return -EINVAL;
6904 }
6905 changed = (sdebug_max_luns != n);
6906 sdebug_max_luns = n;
6907 sdebug_max_tgts_luns();
6908 if (changed && (sdebug_scsi_level >= 5)) { /* >= SPC-3 */
6909 struct sdebug_host_info *sdhp;
6910 struct sdebug_dev_info *dp;
6911
6912 mutex_lock(&sdebug_host_list_mutex);
6913 list_for_each_entry(sdhp, &sdebug_host_list,
6914 host_list) {
6915 list_for_each_entry(dp, &sdhp->dev_info_list,
6916 dev_list) {
6917 set_bit(SDEBUG_UA_LUNS_CHANGED,
6918 dp->uas_bm);
6919 }
6920 }
6921 mutex_unlock(&sdebug_host_list_mutex);
6922 }
6923 return count;
6924 }
6925 return -EINVAL;
6926}
6927static DRIVER_ATTR_RW(max_luns);
6928
6929static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
6930{
6931 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_queue);
6932}
6933/* N.B. max_queue can be changed while there are queued commands. In flight
6934 * commands beyond the new max_queue will be completed. */
6935static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
6936 size_t count)
6937{
6938 int n;
6939
6940 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
6941 (n <= SDEBUG_CANQUEUE) &&
6942 (sdebug_host_max_queue == 0)) {
6943 mutex_lock(&sdebug_host_list_mutex);
6944
6945 /* We may only change sdebug_max_queue when we have no shosts */
6946 if (list_empty(&sdebug_host_list))
6947 sdebug_max_queue = n;
6948 else
6949 count = -EBUSY;
6950 mutex_unlock(&sdebug_host_list_mutex);
6951 return count;
6952 }
6953 return -EINVAL;
6954}
6955static DRIVER_ATTR_RW(max_queue);
6956
6957static ssize_t host_max_queue_show(struct device_driver *ddp, char *buf)
6958{
6959 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_host_max_queue);
6960}
6961
6962static ssize_t no_rwlock_show(struct device_driver *ddp, char *buf)
6963{
6964 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_rwlock);
6965}
6966
6967static ssize_t no_rwlock_store(struct device_driver *ddp, const char *buf, size_t count)
6968{
6969 bool v;
6970
6971 if (kstrtobool(buf, &v))
6972 return -EINVAL;
6973
6974 sdebug_no_rwlock = v;
6975 return count;
6976}
6977static DRIVER_ATTR_RW(no_rwlock);
6978
6979/*
6980 * Since this is used for .can_queue, and we get the hc_idx tag from the bitmap
6981 * in range [0, sdebug_host_max_queue), we can't change it.
6982 */
6983static DRIVER_ATTR_RO(host_max_queue);
6984
6985static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
6986{
6987 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_uld);
6988}
6989static DRIVER_ATTR_RO(no_uld);
6990
6991static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
6992{
6993 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_scsi_level);
6994}
6995static DRIVER_ATTR_RO(scsi_level);
6996
6997static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
6998{
6999 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_virtual_gb);
7000}
7001static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
7002 size_t count)
7003{
7004 int n;
7005 bool changed;
7006
7007 /* Ignore capacity change for ZBC drives for now */
7008 if (sdeb_zbc_in_use)
7009 return -ENOTSUPP;
7010
7011 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7012 changed = (sdebug_virtual_gb != n);
7013 sdebug_virtual_gb = n;
7014 sdebug_capacity = get_sdebug_capacity();
7015 if (changed) {
7016 struct sdebug_host_info *sdhp;
7017 struct sdebug_dev_info *dp;
7018
7019 mutex_lock(&sdebug_host_list_mutex);
7020 list_for_each_entry(sdhp, &sdebug_host_list,
7021 host_list) {
7022 list_for_each_entry(dp, &sdhp->dev_info_list,
7023 dev_list) {
7024 set_bit(SDEBUG_UA_CAPACITY_CHANGED,
7025 dp->uas_bm);
7026 }
7027 }
7028 mutex_unlock(&sdebug_host_list_mutex);
7029 }
7030 return count;
7031 }
7032 return -EINVAL;
7033}
7034static DRIVER_ATTR_RW(virtual_gb);
7035
7036static ssize_t add_host_show(struct device_driver *ddp, char *buf)
7037{
7038 /* absolute number of hosts currently active is what is shown */
7039 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_hosts);
7040}
7041
7042static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
7043 size_t count)
7044{
7045 bool found;
7046 unsigned long idx;
7047 struct sdeb_store_info *sip;
7048 bool want_phs = (sdebug_fake_rw == 0) && sdebug_per_host_store;
7049 int delta_hosts;
7050
7051 if (sscanf(buf, "%d", &delta_hosts) != 1)
7052 return -EINVAL;
7053 if (delta_hosts > 0) {
7054 do {
7055 found = false;
7056 if (want_phs) {
7057 xa_for_each_marked(per_store_ap, idx, sip,
7058 SDEB_XA_NOT_IN_USE) {
7059 sdeb_most_recent_idx = (int)idx;
7060 found = true;
7061 break;
7062 }
7063 if (found) /* re-use case */
7064 sdebug_add_host_helper((int)idx);
7065 else
7066 sdebug_do_add_host(true);
7067 } else {
7068 sdebug_do_add_host(false);
7069 }
7070 } while (--delta_hosts);
7071 } else if (delta_hosts < 0) {
7072 do {
7073 sdebug_do_remove_host(false);
7074 } while (++delta_hosts);
7075 }
7076 return count;
7077}
7078static DRIVER_ATTR_RW(add_host);
7079
7080static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
7081{
7082 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_vpd_use_hostno);
7083}
7084static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
7085 size_t count)
7086{
7087 int n;
7088
7089 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7090 sdebug_vpd_use_hostno = n;
7091 return count;
7092 }
7093 return -EINVAL;
7094}
7095static DRIVER_ATTR_RW(vpd_use_hostno);
7096
7097static ssize_t statistics_show(struct device_driver *ddp, char *buf)
7098{
7099 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_statistics);
7100}
7101static ssize_t statistics_store(struct device_driver *ddp, const char *buf,
7102 size_t count)
7103{
7104 int n;
7105
7106 if ((count > 0) && (sscanf(buf, "%d", &n) == 1) && (n >= 0)) {
7107 if (n > 0)
7108 sdebug_statistics = true;
7109 else {
7110 clear_queue_stats();
7111 sdebug_statistics = false;
7112 }
7113 return count;
7114 }
7115 return -EINVAL;
7116}
7117static DRIVER_ATTR_RW(statistics);
7118
7119static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
7120{
7121 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_sector_size);
7122}
7123static DRIVER_ATTR_RO(sector_size);
7124
7125static ssize_t submit_queues_show(struct device_driver *ddp, char *buf)
7126{
7127 return scnprintf(buf, PAGE_SIZE, "%d\n", submit_queues);
7128}
7129static DRIVER_ATTR_RO(submit_queues);
7130
7131static ssize_t dix_show(struct device_driver *ddp, char *buf)
7132{
7133 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dix);
7134}
7135static DRIVER_ATTR_RO(dix);
7136
7137static ssize_t dif_show(struct device_driver *ddp, char *buf)
7138{
7139 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dif);
7140}
7141static DRIVER_ATTR_RO(dif);
7142
7143static ssize_t guard_show(struct device_driver *ddp, char *buf)
7144{
7145 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_guard);
7146}
7147static DRIVER_ATTR_RO(guard);
7148
7149static ssize_t ato_show(struct device_driver *ddp, char *buf)
7150{
7151 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ato);
7152}
7153static DRIVER_ATTR_RO(ato);
7154
7155static ssize_t map_show(struct device_driver *ddp, char *buf)
7156{
7157 ssize_t count = 0;
7158
7159 if (!scsi_debug_lbp())
7160 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
7161 sdebug_store_sectors);
7162
7163 if (sdebug_fake_rw == 0 && !xa_empty(per_store_ap)) {
7164 struct sdeb_store_info *sip = xa_load(per_store_ap, 0);
7165
7166 if (sip)
7167 count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
7168 (int)map_size, sip->map_storep);
7169 }
7170 buf[count++] = '\n';
7171 buf[count] = '\0';
7172
7173 return count;
7174}
7175static DRIVER_ATTR_RO(map);
7176
7177static ssize_t random_show(struct device_driver *ddp, char *buf)
7178{
7179 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_random);
7180}
7181
7182static ssize_t random_store(struct device_driver *ddp, const char *buf,
7183 size_t count)
7184{
7185 bool v;
7186
7187 if (kstrtobool(buf, &v))
7188 return -EINVAL;
7189
7190 sdebug_random = v;
7191 return count;
7192}
7193static DRIVER_ATTR_RW(random);
7194
7195static ssize_t removable_show(struct device_driver *ddp, char *buf)
7196{
7197 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_removable ? 1 : 0);
7198}
7199static ssize_t removable_store(struct device_driver *ddp, const char *buf,
7200 size_t count)
7201{
7202 int n;
7203
7204 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7205 sdebug_removable = (n > 0);
7206 return count;
7207 }
7208 return -EINVAL;
7209}
7210static DRIVER_ATTR_RW(removable);
7211
7212static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
7213{
7214 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_host_lock);
7215}
7216/* N.B. sdebug_host_lock does nothing, kept for backward compatibility */
7217static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
7218 size_t count)
7219{
7220 int n;
7221
7222 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7223 sdebug_host_lock = (n > 0);
7224 return count;
7225 }
7226 return -EINVAL;
7227}
7228static DRIVER_ATTR_RW(host_lock);
7229
7230static ssize_t strict_show(struct device_driver *ddp, char *buf)
7231{
7232 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_strict);
7233}
7234static ssize_t strict_store(struct device_driver *ddp, const char *buf,
7235 size_t count)
7236{
7237 int n;
7238
7239 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7240 sdebug_strict = (n > 0);
7241 return count;
7242 }
7243 return -EINVAL;
7244}
7245static DRIVER_ATTR_RW(strict);
7246
7247static ssize_t uuid_ctl_show(struct device_driver *ddp, char *buf)
7248{
7249 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_uuid_ctl);
7250}
7251static DRIVER_ATTR_RO(uuid_ctl);
7252
7253static ssize_t cdb_len_show(struct device_driver *ddp, char *buf)
7254{
7255 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_cdb_len);
7256}
7257static ssize_t cdb_len_store(struct device_driver *ddp, const char *buf,
7258 size_t count)
7259{
7260 int ret, n;
7261
7262 ret = kstrtoint(buf, 0, &n);
7263 if (ret)
7264 return ret;
7265 sdebug_cdb_len = n;
7266 all_config_cdb_len();
7267 return count;
7268}
7269static DRIVER_ATTR_RW(cdb_len);
7270
7271static const char * const zbc_model_strs_a[] = {
7272 [BLK_ZONED_NONE] = "none",
7273 [BLK_ZONED_HA] = "host-aware",
7274 [BLK_ZONED_HM] = "host-managed",
7275};
7276
7277static const char * const zbc_model_strs_b[] = {
7278 [BLK_ZONED_NONE] = "no",
7279 [BLK_ZONED_HA] = "aware",
7280 [BLK_ZONED_HM] = "managed",
7281};
7282
7283static const char * const zbc_model_strs_c[] = {
7284 [BLK_ZONED_NONE] = "0",
7285 [BLK_ZONED_HA] = "1",
7286 [BLK_ZONED_HM] = "2",
7287};
7288
7289static int sdeb_zbc_model_str(const char *cp)
7290{
7291 int res = sysfs_match_string(zbc_model_strs_a, cp);
7292
7293 if (res < 0) {
7294 res = sysfs_match_string(zbc_model_strs_b, cp);
7295 if (res < 0) {
7296 res = sysfs_match_string(zbc_model_strs_c, cp);
7297 if (res < 0)
7298 return -EINVAL;
7299 }
7300 }
7301 return res;
7302}
7303
7304static ssize_t zbc_show(struct device_driver *ddp, char *buf)
7305{
7306 return scnprintf(buf, PAGE_SIZE, "%s\n",
7307 zbc_model_strs_a[sdeb_zbc_model]);
7308}
7309static DRIVER_ATTR_RO(zbc);
7310
7311static ssize_t tur_ms_to_ready_show(struct device_driver *ddp, char *buf)
7312{
7313 return scnprintf(buf, PAGE_SIZE, "%d\n", sdeb_tur_ms_to_ready);
7314}
7315static DRIVER_ATTR_RO(tur_ms_to_ready);
7316
7317static ssize_t group_number_stats_show(struct device_driver *ddp, char *buf)
7318{
7319 char *p = buf, *end = buf + PAGE_SIZE;
7320 int i;
7321
7322 for (i = 0; i < ARRAY_SIZE(writes_by_group_number); i++)
7323 p += scnprintf(p, end - p, "%d %ld\n", i,
7324 atomic_long_read(&writes_by_group_number[i]));
7325
7326 return p - buf;
7327}
7328
7329static ssize_t group_number_stats_store(struct device_driver *ddp,
7330 const char *buf, size_t count)
7331{
7332 int i;
7333
7334 for (i = 0; i < ARRAY_SIZE(writes_by_group_number); i++)
7335 atomic_long_set(&writes_by_group_number[i], 0);
7336
7337 return count;
7338}
7339static DRIVER_ATTR_RW(group_number_stats);
7340
7341/* Note: The following array creates attribute files in the
7342 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
7343 files (over those found in the /sys/module/scsi_debug/parameters
7344 directory) is that auxiliary actions can be triggered when an attribute
7345 is changed. For example see: add_host_store() above.
7346 */
7347
7348static struct attribute *sdebug_drv_attrs[] = {
7349 &driver_attr_delay.attr,
7350 &driver_attr_opts.attr,
7351 &driver_attr_ptype.attr,
7352 &driver_attr_dsense.attr,
7353 &driver_attr_fake_rw.attr,
7354 &driver_attr_host_max_queue.attr,
7355 &driver_attr_no_lun_0.attr,
7356 &driver_attr_num_tgts.attr,
7357 &driver_attr_dev_size_mb.attr,
7358 &driver_attr_num_parts.attr,
7359 &driver_attr_every_nth.attr,
7360 &driver_attr_lun_format.attr,
7361 &driver_attr_max_luns.attr,
7362 &driver_attr_max_queue.attr,
7363 &driver_attr_no_rwlock.attr,
7364 &driver_attr_no_uld.attr,
7365 &driver_attr_scsi_level.attr,
7366 &driver_attr_virtual_gb.attr,
7367 &driver_attr_add_host.attr,
7368 &driver_attr_per_host_store.attr,
7369 &driver_attr_vpd_use_hostno.attr,
7370 &driver_attr_sector_size.attr,
7371 &driver_attr_statistics.attr,
7372 &driver_attr_submit_queues.attr,
7373 &driver_attr_dix.attr,
7374 &driver_attr_dif.attr,
7375 &driver_attr_guard.attr,
7376 &driver_attr_ato.attr,
7377 &driver_attr_map.attr,
7378 &driver_attr_random.attr,
7379 &driver_attr_removable.attr,
7380 &driver_attr_host_lock.attr,
7381 &driver_attr_ndelay.attr,
7382 &driver_attr_strict.attr,
7383 &driver_attr_uuid_ctl.attr,
7384 &driver_attr_cdb_len.attr,
7385 &driver_attr_tur_ms_to_ready.attr,
7386 &driver_attr_zbc.attr,
7387 &driver_attr_group_number_stats.attr,
7388 NULL,
7389};
7390ATTRIBUTE_GROUPS(sdebug_drv);
7391
7392static struct device *pseudo_primary;
7393
7394static int __init scsi_debug_init(void)
7395{
7396 bool want_store = (sdebug_fake_rw == 0);
7397 unsigned long sz;
7398 int k, ret, hosts_to_add;
7399 int idx = -1;
7400
7401 if (sdebug_ndelay >= 1000 * 1000 * 1000) {
7402 pr_warn("ndelay must be less than 1 second, ignored\n");
7403 sdebug_ndelay = 0;
7404 } else if (sdebug_ndelay > 0)
7405 sdebug_jdelay = JDELAY_OVERRIDDEN;
7406
7407 switch (sdebug_sector_size) {
7408 case 512:
7409 case 1024:
7410 case 2048:
7411 case 4096:
7412 break;
7413 default:
7414 pr_err("invalid sector_size %d\n", sdebug_sector_size);
7415 return -EINVAL;
7416 }
7417
7418 switch (sdebug_dif) {
7419 case T10_PI_TYPE0_PROTECTION:
7420 break;
7421 case T10_PI_TYPE1_PROTECTION:
7422 case T10_PI_TYPE2_PROTECTION:
7423 case T10_PI_TYPE3_PROTECTION:
7424 have_dif_prot = true;
7425 break;
7426
7427 default:
7428 pr_err("dif must be 0, 1, 2 or 3\n");
7429 return -EINVAL;
7430 }
7431
7432 if (sdebug_num_tgts < 0) {
7433 pr_err("num_tgts must be >= 0\n");
7434 return -EINVAL;
7435 }
7436
7437 if (sdebug_guard > 1) {
7438 pr_err("guard must be 0 or 1\n");
7439 return -EINVAL;
7440 }
7441
7442 if (sdebug_ato > 1) {
7443 pr_err("ato must be 0 or 1\n");
7444 return -EINVAL;
7445 }
7446
7447 if (sdebug_physblk_exp > 15) {
7448 pr_err("invalid physblk_exp %u\n", sdebug_physblk_exp);
7449 return -EINVAL;
7450 }
7451
7452 sdebug_lun_am = sdebug_lun_am_i;
7453 if (sdebug_lun_am > SAM_LUN_AM_FLAT) {
7454 pr_warn("Invalid LUN format %u, using default\n", (int)sdebug_lun_am);
7455 sdebug_lun_am = SAM_LUN_AM_PERIPHERAL;
7456 }
7457
7458 if (sdebug_max_luns > 256) {
7459 if (sdebug_max_luns > 16384) {
7460 pr_warn("max_luns can be no more than 16384, use default\n");
7461 sdebug_max_luns = DEF_MAX_LUNS;
7462 }
7463 sdebug_lun_am = SAM_LUN_AM_FLAT;
7464 }
7465
7466 if (sdebug_lowest_aligned > 0x3fff) {
7467 pr_err("lowest_aligned too big: %u\n", sdebug_lowest_aligned);
7468 return -EINVAL;
7469 }
7470
7471 if (submit_queues < 1) {
7472 pr_err("submit_queues must be 1 or more\n");
7473 return -EINVAL;
7474 }
7475
7476 if ((sdebug_max_queue > SDEBUG_CANQUEUE) || (sdebug_max_queue < 1)) {
7477 pr_err("max_queue must be in range [1, %d]\n", SDEBUG_CANQUEUE);
7478 return -EINVAL;
7479 }
7480
7481 if ((sdebug_host_max_queue > SDEBUG_CANQUEUE) ||
7482 (sdebug_host_max_queue < 0)) {
7483 pr_err("host_max_queue must be in range [0 %d]\n",
7484 SDEBUG_CANQUEUE);
7485 return -EINVAL;
7486 }
7487
7488 if (sdebug_host_max_queue &&
7489 (sdebug_max_queue != sdebug_host_max_queue)) {
7490 sdebug_max_queue = sdebug_host_max_queue;
7491 pr_warn("fixing max submit queue depth to host max queue depth, %d\n",
7492 sdebug_max_queue);
7493 }
7494
7495 /*
7496 * check for host managed zoned block device specified with
7497 * ptype=0x14 or zbc=XXX.
7498 */
7499 if (sdebug_ptype == TYPE_ZBC) {
7500 sdeb_zbc_model = BLK_ZONED_HM;
7501 } else if (sdeb_zbc_model_s && *sdeb_zbc_model_s) {
7502 k = sdeb_zbc_model_str(sdeb_zbc_model_s);
7503 if (k < 0)
7504 return k;
7505 sdeb_zbc_model = k;
7506 switch (sdeb_zbc_model) {
7507 case BLK_ZONED_NONE:
7508 case BLK_ZONED_HA:
7509 sdebug_ptype = TYPE_DISK;
7510 break;
7511 case BLK_ZONED_HM:
7512 sdebug_ptype = TYPE_ZBC;
7513 break;
7514 default:
7515 pr_err("Invalid ZBC model\n");
7516 return -EINVAL;
7517 }
7518 }
7519 if (sdeb_zbc_model != BLK_ZONED_NONE) {
7520 sdeb_zbc_in_use = true;
7521 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT)
7522 sdebug_dev_size_mb = DEF_ZBC_DEV_SIZE_MB;
7523 }
7524
7525 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT)
7526 sdebug_dev_size_mb = DEF_DEV_SIZE_MB;
7527 if (sdebug_dev_size_mb < 1)
7528 sdebug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
7529 sz = (unsigned long)sdebug_dev_size_mb * 1048576;
7530 sdebug_store_sectors = sz / sdebug_sector_size;
7531 sdebug_capacity = get_sdebug_capacity();
7532
7533 /* play around with geometry, don't waste too much on track 0 */
7534 sdebug_heads = 8;
7535 sdebug_sectors_per = 32;
7536 if (sdebug_dev_size_mb >= 256)
7537 sdebug_heads = 64;
7538 else if (sdebug_dev_size_mb >= 16)
7539 sdebug_heads = 32;
7540 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
7541 (sdebug_sectors_per * sdebug_heads);
7542 if (sdebug_cylinders_per >= 1024) {
7543 /* other LLDs do this; implies >= 1GB ram disk ... */
7544 sdebug_heads = 255;
7545 sdebug_sectors_per = 63;
7546 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
7547 (sdebug_sectors_per * sdebug_heads);
7548 }
7549 if (scsi_debug_lbp()) {
7550 sdebug_unmap_max_blocks =
7551 clamp(sdebug_unmap_max_blocks, 0U, 0xffffffffU);
7552
7553 sdebug_unmap_max_desc =
7554 clamp(sdebug_unmap_max_desc, 0U, 256U);
7555
7556 sdebug_unmap_granularity =
7557 clamp(sdebug_unmap_granularity, 1U, 0xffffffffU);
7558
7559 if (sdebug_unmap_alignment &&
7560 sdebug_unmap_granularity <=
7561 sdebug_unmap_alignment) {
7562 pr_err("ERR: unmap_granularity <= unmap_alignment\n");
7563 return -EINVAL;
7564 }
7565 }
7566 xa_init_flags(per_store_ap, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ);
7567 if (want_store) {
7568 idx = sdebug_add_store();
7569 if (idx < 0)
7570 return idx;
7571 }
7572
7573 pseudo_primary = root_device_register("pseudo_0");
7574 if (IS_ERR(pseudo_primary)) {
7575 pr_warn("root_device_register() error\n");
7576 ret = PTR_ERR(pseudo_primary);
7577 goto free_vm;
7578 }
7579 ret = bus_register(&pseudo_lld_bus);
7580 if (ret < 0) {
7581 pr_warn("bus_register error: %d\n", ret);
7582 goto dev_unreg;
7583 }
7584 ret = driver_register(&sdebug_driverfs_driver);
7585 if (ret < 0) {
7586 pr_warn("driver_register error: %d\n", ret);
7587 goto bus_unreg;
7588 }
7589
7590 hosts_to_add = sdebug_add_host;
7591 sdebug_add_host = 0;
7592
7593 queued_cmd_cache = KMEM_CACHE(sdebug_queued_cmd, SLAB_HWCACHE_ALIGN);
7594 if (!queued_cmd_cache) {
7595 ret = -ENOMEM;
7596 goto driver_unreg;
7597 }
7598
7599 sdebug_debugfs_root = debugfs_create_dir("scsi_debug", NULL);
7600 if (IS_ERR_OR_NULL(sdebug_debugfs_root))
7601 pr_info("%s: failed to create initial debugfs directory\n", __func__);
7602
7603 for (k = 0; k < hosts_to_add; k++) {
7604 if (want_store && k == 0) {
7605 ret = sdebug_add_host_helper(idx);
7606 if (ret < 0) {
7607 pr_err("add_host_helper k=%d, error=%d\n",
7608 k, -ret);
7609 break;
7610 }
7611 } else {
7612 ret = sdebug_do_add_host(want_store &&
7613 sdebug_per_host_store);
7614 if (ret < 0) {
7615 pr_err("add_host k=%d error=%d\n", k, -ret);
7616 break;
7617 }
7618 }
7619 }
7620 if (sdebug_verbose)
7621 pr_info("built %d host(s)\n", sdebug_num_hosts);
7622
7623 return 0;
7624
7625driver_unreg:
7626 driver_unregister(&sdebug_driverfs_driver);
7627bus_unreg:
7628 bus_unregister(&pseudo_lld_bus);
7629dev_unreg:
7630 root_device_unregister(pseudo_primary);
7631free_vm:
7632 sdebug_erase_store(idx, NULL);
7633 return ret;
7634}
7635
7636static void __exit scsi_debug_exit(void)
7637{
7638 int k = sdebug_num_hosts;
7639
7640 for (; k; k--)
7641 sdebug_do_remove_host(true);
7642 kmem_cache_destroy(queued_cmd_cache);
7643 driver_unregister(&sdebug_driverfs_driver);
7644 bus_unregister(&pseudo_lld_bus);
7645 root_device_unregister(pseudo_primary);
7646
7647 sdebug_erase_all_stores(false);
7648 xa_destroy(per_store_ap);
7649 debugfs_remove(sdebug_debugfs_root);
7650}
7651
7652device_initcall(scsi_debug_init);
7653module_exit(scsi_debug_exit);
7654
7655static void sdebug_release_adapter(struct device *dev)
7656{
7657 struct sdebug_host_info *sdbg_host;
7658
7659 sdbg_host = dev_to_sdebug_host(dev);
7660 kfree(sdbg_host);
7661}
7662
7663/* idx must be valid, if sip is NULL then it will be obtained using idx */
7664static void sdebug_erase_store(int idx, struct sdeb_store_info *sip)
7665{
7666 if (idx < 0)
7667 return;
7668 if (!sip) {
7669 if (xa_empty(per_store_ap))
7670 return;
7671 sip = xa_load(per_store_ap, idx);
7672 if (!sip)
7673 return;
7674 }
7675 vfree(sip->map_storep);
7676 vfree(sip->dif_storep);
7677 vfree(sip->storep);
7678 xa_erase(per_store_ap, idx);
7679 kfree(sip);
7680}
7681
7682/* Assume apart_from_first==false only in shutdown case. */
7683static void sdebug_erase_all_stores(bool apart_from_first)
7684{
7685 unsigned long idx;
7686 struct sdeb_store_info *sip = NULL;
7687
7688 xa_for_each(per_store_ap, idx, sip) {
7689 if (apart_from_first)
7690 apart_from_first = false;
7691 else
7692 sdebug_erase_store(idx, sip);
7693 }
7694 if (apart_from_first)
7695 sdeb_most_recent_idx = sdeb_first_idx;
7696}
7697
7698/*
7699 * Returns store xarray new element index (idx) if >=0 else negated errno.
7700 * Limit the number of stores to 65536.
7701 */
7702static int sdebug_add_store(void)
7703{
7704 int res;
7705 u32 n_idx;
7706 unsigned long iflags;
7707 unsigned long sz = (unsigned long)sdebug_dev_size_mb * 1048576;
7708 struct sdeb_store_info *sip = NULL;
7709 struct xa_limit xal = { .max = 1 << 16, .min = 0 };
7710
7711 sip = kzalloc(sizeof(*sip), GFP_KERNEL);
7712 if (!sip)
7713 return -ENOMEM;
7714
7715 xa_lock_irqsave(per_store_ap, iflags);
7716 res = __xa_alloc(per_store_ap, &n_idx, sip, xal, GFP_ATOMIC);
7717 if (unlikely(res < 0)) {
7718 xa_unlock_irqrestore(per_store_ap, iflags);
7719 kfree(sip);
7720 pr_warn("%s: xa_alloc() errno=%d\n", __func__, -res);
7721 return res;
7722 }
7723 sdeb_most_recent_idx = n_idx;
7724 if (sdeb_first_idx < 0)
7725 sdeb_first_idx = n_idx;
7726 xa_unlock_irqrestore(per_store_ap, iflags);
7727
7728 res = -ENOMEM;
7729 sip->storep = vzalloc(sz);
7730 if (!sip->storep) {
7731 pr_err("user data oom\n");
7732 goto err;
7733 }
7734 if (sdebug_num_parts > 0)
7735 sdebug_build_parts(sip->storep, sz);
7736
7737 /* DIF/DIX: what T10 calls Protection Information (PI) */
7738 if (sdebug_dix) {
7739 int dif_size;
7740
7741 dif_size = sdebug_store_sectors * sizeof(struct t10_pi_tuple);
7742 sip->dif_storep = vmalloc(dif_size);
7743
7744 pr_info("dif_storep %u bytes @ %pK\n", dif_size,
7745 sip->dif_storep);
7746
7747 if (!sip->dif_storep) {
7748 pr_err("DIX oom\n");
7749 goto err;
7750 }
7751 memset(sip->dif_storep, 0xff, dif_size);
7752 }
7753 /* Logical Block Provisioning */
7754 if (scsi_debug_lbp()) {
7755 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
7756 sip->map_storep = vmalloc(array_size(sizeof(long),
7757 BITS_TO_LONGS(map_size)));
7758
7759 pr_info("%lu provisioning blocks\n", map_size);
7760
7761 if (!sip->map_storep) {
7762 pr_err("LBP map oom\n");
7763 goto err;
7764 }
7765
7766 bitmap_zero(sip->map_storep, map_size);
7767
7768 /* Map first 1KB for partition table */
7769 if (sdebug_num_parts)
7770 map_region(sip, 0, 2);
7771 }
7772
7773 rwlock_init(&sip->macc_lck);
7774 return (int)n_idx;
7775err:
7776 sdebug_erase_store((int)n_idx, sip);
7777 pr_warn("%s: failed, errno=%d\n", __func__, -res);
7778 return res;
7779}
7780
7781static int sdebug_add_host_helper(int per_host_idx)
7782{
7783 int k, devs_per_host, idx;
7784 int error = -ENOMEM;
7785 struct sdebug_host_info *sdbg_host;
7786 struct sdebug_dev_info *sdbg_devinfo, *tmp;
7787
7788 sdbg_host = kzalloc(sizeof(*sdbg_host), GFP_KERNEL);
7789 if (!sdbg_host)
7790 return -ENOMEM;
7791 idx = (per_host_idx < 0) ? sdeb_first_idx : per_host_idx;
7792 if (xa_get_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE))
7793 xa_clear_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE);
7794 sdbg_host->si_idx = idx;
7795
7796 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
7797
7798 devs_per_host = sdebug_num_tgts * sdebug_max_luns;
7799 for (k = 0; k < devs_per_host; k++) {
7800 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
7801 if (!sdbg_devinfo)
7802 goto clean;
7803 }
7804
7805 mutex_lock(&sdebug_host_list_mutex);
7806 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
7807 mutex_unlock(&sdebug_host_list_mutex);
7808
7809 sdbg_host->dev.bus = &pseudo_lld_bus;
7810 sdbg_host->dev.parent = pseudo_primary;
7811 sdbg_host->dev.release = &sdebug_release_adapter;
7812 dev_set_name(&sdbg_host->dev, "adapter%d", sdebug_num_hosts);
7813
7814 error = device_register(&sdbg_host->dev);
7815 if (error) {
7816 mutex_lock(&sdebug_host_list_mutex);
7817 list_del(&sdbg_host->host_list);
7818 mutex_unlock(&sdebug_host_list_mutex);
7819 goto clean;
7820 }
7821
7822 ++sdebug_num_hosts;
7823 return 0;
7824
7825clean:
7826 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
7827 dev_list) {
7828 list_del(&sdbg_devinfo->dev_list);
7829 kfree(sdbg_devinfo->zstate);
7830 kfree(sdbg_devinfo);
7831 }
7832 if (sdbg_host->dev.release)
7833 put_device(&sdbg_host->dev);
7834 else
7835 kfree(sdbg_host);
7836 pr_warn("%s: failed, errno=%d\n", __func__, -error);
7837 return error;
7838}
7839
7840static int sdebug_do_add_host(bool mk_new_store)
7841{
7842 int ph_idx = sdeb_most_recent_idx;
7843
7844 if (mk_new_store) {
7845 ph_idx = sdebug_add_store();
7846 if (ph_idx < 0)
7847 return ph_idx;
7848 }
7849 return sdebug_add_host_helper(ph_idx);
7850}
7851
7852static void sdebug_do_remove_host(bool the_end)
7853{
7854 int idx = -1;
7855 struct sdebug_host_info *sdbg_host = NULL;
7856 struct sdebug_host_info *sdbg_host2;
7857
7858 mutex_lock(&sdebug_host_list_mutex);
7859 if (!list_empty(&sdebug_host_list)) {
7860 sdbg_host = list_entry(sdebug_host_list.prev,
7861 struct sdebug_host_info, host_list);
7862 idx = sdbg_host->si_idx;
7863 }
7864 if (!the_end && idx >= 0) {
7865 bool unique = true;
7866
7867 list_for_each_entry(sdbg_host2, &sdebug_host_list, host_list) {
7868 if (sdbg_host2 == sdbg_host)
7869 continue;
7870 if (idx == sdbg_host2->si_idx) {
7871 unique = false;
7872 break;
7873 }
7874 }
7875 if (unique) {
7876 xa_set_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE);
7877 if (idx == sdeb_most_recent_idx)
7878 --sdeb_most_recent_idx;
7879 }
7880 }
7881 if (sdbg_host)
7882 list_del(&sdbg_host->host_list);
7883 mutex_unlock(&sdebug_host_list_mutex);
7884
7885 if (!sdbg_host)
7886 return;
7887
7888 device_unregister(&sdbg_host->dev);
7889 --sdebug_num_hosts;
7890}
7891
7892static int sdebug_change_qdepth(struct scsi_device *sdev, int qdepth)
7893{
7894 struct sdebug_dev_info *devip = sdev->hostdata;
7895
7896 if (!devip)
7897 return -ENODEV;
7898
7899 mutex_lock(&sdebug_host_list_mutex);
7900 block_unblock_all_queues(true);
7901
7902 if (qdepth > SDEBUG_CANQUEUE) {
7903 qdepth = SDEBUG_CANQUEUE;
7904 pr_warn("%s: requested qdepth [%d] exceeds canqueue [%d], trim\n", __func__,
7905 qdepth, SDEBUG_CANQUEUE);
7906 }
7907 if (qdepth < 1)
7908 qdepth = 1;
7909 if (qdepth != sdev->queue_depth)
7910 scsi_change_queue_depth(sdev, qdepth);
7911
7912 block_unblock_all_queues(false);
7913 mutex_unlock(&sdebug_host_list_mutex);
7914
7915 if (SDEBUG_OPT_Q_NOISE & sdebug_opts)
7916 sdev_printk(KERN_INFO, sdev, "%s: qdepth=%d\n", __func__, qdepth);
7917
7918 return sdev->queue_depth;
7919}
7920
7921static bool fake_timeout(struct scsi_cmnd *scp)
7922{
7923 if (0 == (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth))) {
7924 if (sdebug_every_nth < -1)
7925 sdebug_every_nth = -1;
7926 if (SDEBUG_OPT_TIMEOUT & sdebug_opts)
7927 return true; /* ignore command causing timeout */
7928 else if (SDEBUG_OPT_MAC_TIMEOUT & sdebug_opts &&
7929 scsi_medium_access_command(scp))
7930 return true; /* time out reads and writes */
7931 }
7932 return false;
7933}
7934
7935/* Response to TUR or media access command when device stopped */
7936static int resp_not_ready(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
7937{
7938 int stopped_state;
7939 u64 diff_ns = 0;
7940 ktime_t now_ts = ktime_get_boottime();
7941 struct scsi_device *sdp = scp->device;
7942
7943 stopped_state = atomic_read(&devip->stopped);
7944 if (stopped_state == 2) {
7945 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) {
7946 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts));
7947 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) {
7948 /* tur_ms_to_ready timer extinguished */
7949 atomic_set(&devip->stopped, 0);
7950 return 0;
7951 }
7952 }
7953 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x1);
7954 if (sdebug_verbose)
7955 sdev_printk(KERN_INFO, sdp,
7956 "%s: Not ready: in process of becoming ready\n", my_name);
7957 if (scp->cmnd[0] == TEST_UNIT_READY) {
7958 u64 tur_nanosecs_to_ready = (u64)sdeb_tur_ms_to_ready * 1000000;
7959
7960 if (diff_ns <= tur_nanosecs_to_ready)
7961 diff_ns = tur_nanosecs_to_ready - diff_ns;
7962 else
7963 diff_ns = tur_nanosecs_to_ready;
7964 /* As per 20-061r2 approved for spc6 by T10 on 20200716 */
7965 do_div(diff_ns, 1000000); /* diff_ns becomes milliseconds */
7966 scsi_set_sense_information(scp->sense_buffer, SCSI_SENSE_BUFFERSIZE,
7967 diff_ns);
7968 return check_condition_result;
7969 }
7970 }
7971 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2);
7972 if (sdebug_verbose)
7973 sdev_printk(KERN_INFO, sdp, "%s: Not ready: initializing command required\n",
7974 my_name);
7975 return check_condition_result;
7976}
7977
7978static void sdebug_map_queues(struct Scsi_Host *shost)
7979{
7980 int i, qoff;
7981
7982 if (shost->nr_hw_queues == 1)
7983 return;
7984
7985 for (i = 0, qoff = 0; i < HCTX_MAX_TYPES; i++) {
7986 struct blk_mq_queue_map *map = &shost->tag_set.map[i];
7987
7988 map->nr_queues = 0;
7989
7990 if (i == HCTX_TYPE_DEFAULT)
7991 map->nr_queues = submit_queues - poll_queues;
7992 else if (i == HCTX_TYPE_POLL)
7993 map->nr_queues = poll_queues;
7994
7995 if (!map->nr_queues) {
7996 BUG_ON(i == HCTX_TYPE_DEFAULT);
7997 continue;
7998 }
7999
8000 map->queue_offset = qoff;
8001 blk_mq_map_queues(map);
8002
8003 qoff += map->nr_queues;
8004 }
8005}
8006
8007struct sdebug_blk_mq_poll_data {
8008 unsigned int queue_num;
8009 int *num_entries;
8010};
8011
8012/*
8013 * We don't handle aborted commands here, but it does not seem possible to have
8014 * aborted polled commands from schedule_resp()
8015 */
8016static bool sdebug_blk_mq_poll_iter(struct request *rq, void *opaque)
8017{
8018 struct sdebug_blk_mq_poll_data *data = opaque;
8019 struct scsi_cmnd *cmd = blk_mq_rq_to_pdu(rq);
8020 struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmd);
8021 struct sdebug_defer *sd_dp;
8022 u32 unique_tag = blk_mq_unique_tag(rq);
8023 u16 hwq = blk_mq_unique_tag_to_hwq(unique_tag);
8024 struct sdebug_queued_cmd *sqcp;
8025 unsigned long flags;
8026 int queue_num = data->queue_num;
8027 ktime_t time;
8028
8029 /* We're only interested in one queue for this iteration */
8030 if (hwq != queue_num)
8031 return true;
8032
8033 /* Subsequent checks would fail if this failed, but check anyway */
8034 if (!test_bit(SCMD_STATE_INFLIGHT, &cmd->state))
8035 return true;
8036
8037 time = ktime_get_boottime();
8038
8039 spin_lock_irqsave(&sdsc->lock, flags);
8040 sqcp = TO_QUEUED_CMD(cmd);
8041 if (!sqcp) {
8042 spin_unlock_irqrestore(&sdsc->lock, flags);
8043 return true;
8044 }
8045
8046 sd_dp = &sqcp->sd_dp;
8047 if (READ_ONCE(sd_dp->defer_t) != SDEB_DEFER_POLL) {
8048 spin_unlock_irqrestore(&sdsc->lock, flags);
8049 return true;
8050 }
8051
8052 if (time < sd_dp->cmpl_ts) {
8053 spin_unlock_irqrestore(&sdsc->lock, flags);
8054 return true;
8055 }
8056
8057 ASSIGN_QUEUED_CMD(cmd, NULL);
8058 spin_unlock_irqrestore(&sdsc->lock, flags);
8059
8060 if (sdebug_statistics) {
8061 atomic_inc(&sdebug_completions);
8062 if (raw_smp_processor_id() != sd_dp->issuing_cpu)
8063 atomic_inc(&sdebug_miss_cpus);
8064 }
8065
8066 sdebug_free_queued_cmd(sqcp);
8067
8068 scsi_done(cmd); /* callback to mid level */
8069 (*data->num_entries)++;
8070 return true;
8071}
8072
8073static int sdebug_blk_mq_poll(struct Scsi_Host *shost, unsigned int queue_num)
8074{
8075 int num_entries = 0;
8076 struct sdebug_blk_mq_poll_data data = {
8077 .queue_num = queue_num,
8078 .num_entries = &num_entries,
8079 };
8080
8081 blk_mq_tagset_busy_iter(&shost->tag_set, sdebug_blk_mq_poll_iter,
8082 &data);
8083
8084 if (num_entries > 0)
8085 atomic_add(num_entries, &sdeb_mq_poll_count);
8086 return num_entries;
8087}
8088
8089static int sdebug_timeout_cmd(struct scsi_cmnd *cmnd)
8090{
8091 struct scsi_device *sdp = cmnd->device;
8092 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
8093 struct sdebug_err_inject *err;
8094 unsigned char *cmd = cmnd->cmnd;
8095 int ret = 0;
8096
8097 if (devip == NULL)
8098 return 0;
8099
8100 rcu_read_lock();
8101 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
8102 if (err->type == ERR_TMOUT_CMD &&
8103 (err->cmd == cmd[0] || err->cmd == 0xff)) {
8104 ret = !!err->cnt;
8105 if (err->cnt < 0)
8106 err->cnt++;
8107
8108 rcu_read_unlock();
8109 return ret;
8110 }
8111 }
8112 rcu_read_unlock();
8113
8114 return 0;
8115}
8116
8117static int sdebug_fail_queue_cmd(struct scsi_cmnd *cmnd)
8118{
8119 struct scsi_device *sdp = cmnd->device;
8120 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
8121 struct sdebug_err_inject *err;
8122 unsigned char *cmd = cmnd->cmnd;
8123 int ret = 0;
8124
8125 if (devip == NULL)
8126 return 0;
8127
8128 rcu_read_lock();
8129 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
8130 if (err->type == ERR_FAIL_QUEUE_CMD &&
8131 (err->cmd == cmd[0] || err->cmd == 0xff)) {
8132 ret = err->cnt ? err->queuecmd_ret : 0;
8133 if (err->cnt < 0)
8134 err->cnt++;
8135
8136 rcu_read_unlock();
8137 return ret;
8138 }
8139 }
8140 rcu_read_unlock();
8141
8142 return 0;
8143}
8144
8145static int sdebug_fail_cmd(struct scsi_cmnd *cmnd, int *retval,
8146 struct sdebug_err_inject *info)
8147{
8148 struct scsi_device *sdp = cmnd->device;
8149 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
8150 struct sdebug_err_inject *err;
8151 unsigned char *cmd = cmnd->cmnd;
8152 int ret = 0;
8153 int result;
8154
8155 if (devip == NULL)
8156 return 0;
8157
8158 rcu_read_lock();
8159 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
8160 if (err->type == ERR_FAIL_CMD &&
8161 (err->cmd == cmd[0] || err->cmd == 0xff)) {
8162 if (!err->cnt) {
8163 rcu_read_unlock();
8164 return 0;
8165 }
8166
8167 ret = !!err->cnt;
8168 rcu_read_unlock();
8169 goto out_handle;
8170 }
8171 }
8172 rcu_read_unlock();
8173
8174 return 0;
8175
8176out_handle:
8177 if (err->cnt < 0)
8178 err->cnt++;
8179 mk_sense_buffer(cmnd, err->sense_key, err->asc, err->asq);
8180 result = err->status_byte | err->host_byte << 16 | err->driver_byte << 24;
8181 *info = *err;
8182 *retval = schedule_resp(cmnd, devip, result, NULL, 0, 0);
8183
8184 return ret;
8185}
8186
8187static int scsi_debug_queuecommand(struct Scsi_Host *shost,
8188 struct scsi_cmnd *scp)
8189{
8190 u8 sdeb_i;
8191 struct scsi_device *sdp = scp->device;
8192 const struct opcode_info_t *oip;
8193 const struct opcode_info_t *r_oip;
8194 struct sdebug_dev_info *devip;
8195 u8 *cmd = scp->cmnd;
8196 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
8197 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *) = NULL;
8198 int k, na;
8199 int errsts = 0;
8200 u64 lun_index = sdp->lun & 0x3FFF;
8201 u32 flags;
8202 u16 sa;
8203 u8 opcode = cmd[0];
8204 bool has_wlun_rl;
8205 bool inject_now;
8206 int ret = 0;
8207 struct sdebug_err_inject err;
8208
8209 scsi_set_resid(scp, 0);
8210 if (sdebug_statistics) {
8211 atomic_inc(&sdebug_cmnd_count);
8212 inject_now = inject_on_this_cmd();
8213 } else {
8214 inject_now = false;
8215 }
8216 if (unlikely(sdebug_verbose &&
8217 !(SDEBUG_OPT_NO_CDB_NOISE & sdebug_opts))) {
8218 char b[120];
8219 int n, len, sb;
8220
8221 len = scp->cmd_len;
8222 sb = (int)sizeof(b);
8223 if (len > 32)
8224 strcpy(b, "too long, over 32 bytes");
8225 else {
8226 for (k = 0, n = 0; k < len && n < sb; ++k)
8227 n += scnprintf(b + n, sb - n, "%02x ",
8228 (u32)cmd[k]);
8229 }
8230 sdev_printk(KERN_INFO, sdp, "%s: tag=%#x, cmd %s\n", my_name,
8231 blk_mq_unique_tag(scsi_cmd_to_rq(scp)), b);
8232 }
8233 if (unlikely(inject_now && (sdebug_opts & SDEBUG_OPT_HOST_BUSY)))
8234 return SCSI_MLQUEUE_HOST_BUSY;
8235 has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS);
8236 if (unlikely(lun_index >= sdebug_max_luns && !has_wlun_rl))
8237 goto err_out;
8238
8239 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */
8240 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */
8241 devip = (struct sdebug_dev_info *)sdp->hostdata;
8242 if (unlikely(!devip)) {
8243 devip = find_build_dev_info(sdp);
8244 if (NULL == devip)
8245 goto err_out;
8246 }
8247
8248 if (sdebug_timeout_cmd(scp)) {
8249 scmd_printk(KERN_INFO, scp, "timeout command 0x%x\n", opcode);
8250 return 0;
8251 }
8252
8253 ret = sdebug_fail_queue_cmd(scp);
8254 if (ret) {
8255 scmd_printk(KERN_INFO, scp, "fail queue command 0x%x with 0x%x\n",
8256 opcode, ret);
8257 return ret;
8258 }
8259
8260 if (sdebug_fail_cmd(scp, &ret, &err)) {
8261 scmd_printk(KERN_INFO, scp,
8262 "fail command 0x%x with hostbyte=0x%x, "
8263 "driverbyte=0x%x, statusbyte=0x%x, "
8264 "sense_key=0x%x, asc=0x%x, asq=0x%x\n",
8265 opcode, err.host_byte, err.driver_byte,
8266 err.status_byte, err.sense_key, err.asc, err.asq);
8267 return ret;
8268 }
8269
8270 if (unlikely(inject_now && !atomic_read(&sdeb_inject_pending)))
8271 atomic_set(&sdeb_inject_pending, 1);
8272
8273 na = oip->num_attached;
8274 r_pfp = oip->pfp;
8275 if (na) { /* multiple commands with this opcode */
8276 r_oip = oip;
8277 if (FF_SA & r_oip->flags) {
8278 if (F_SA_LOW & oip->flags)
8279 sa = 0x1f & cmd[1];
8280 else
8281 sa = get_unaligned_be16(cmd + 8);
8282 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
8283 if (opcode == oip->opcode && sa == oip->sa)
8284 break;
8285 }
8286 } else { /* since no service action only check opcode */
8287 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
8288 if (opcode == oip->opcode)
8289 break;
8290 }
8291 }
8292 if (k > na) {
8293 if (F_SA_LOW & r_oip->flags)
8294 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4);
8295 else if (F_SA_HIGH & r_oip->flags)
8296 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7);
8297 else
8298 mk_sense_invalid_opcode(scp);
8299 goto check_cond;
8300 }
8301 } /* else (when na==0) we assume the oip is a match */
8302 flags = oip->flags;
8303 if (unlikely(F_INV_OP & flags)) {
8304 mk_sense_invalid_opcode(scp);
8305 goto check_cond;
8306 }
8307 if (unlikely(has_wlun_rl && !(F_RL_WLUN_OK & flags))) {
8308 if (sdebug_verbose)
8309 sdev_printk(KERN_INFO, sdp, "%s: Opcode 0x%x not%s\n",
8310 my_name, opcode, " supported for wlun");
8311 mk_sense_invalid_opcode(scp);
8312 goto check_cond;
8313 }
8314 if (unlikely(sdebug_strict)) { /* check cdb against mask */
8315 u8 rem;
8316 int j;
8317
8318 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) {
8319 rem = ~oip->len_mask[k] & cmd[k];
8320 if (rem) {
8321 for (j = 7; j >= 0; --j, rem <<= 1) {
8322 if (0x80 & rem)
8323 break;
8324 }
8325 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j);
8326 goto check_cond;
8327 }
8328 }
8329 }
8330 if (unlikely(!(F_SKIP_UA & flags) &&
8331 find_first_bit(devip->uas_bm,
8332 SDEBUG_NUM_UAS) != SDEBUG_NUM_UAS)) {
8333 errsts = make_ua(scp, devip);
8334 if (errsts)
8335 goto check_cond;
8336 }
8337 if (unlikely(((F_M_ACCESS & flags) || scp->cmnd[0] == TEST_UNIT_READY) &&
8338 atomic_read(&devip->stopped))) {
8339 errsts = resp_not_ready(scp, devip);
8340 if (errsts)
8341 goto fini;
8342 }
8343 if (sdebug_fake_rw && (F_FAKE_RW & flags))
8344 goto fini;
8345 if (unlikely(sdebug_every_nth)) {
8346 if (fake_timeout(scp))
8347 return 0; /* ignore command: make trouble */
8348 }
8349 if (likely(oip->pfp))
8350 pfp = oip->pfp; /* calls a resp_* function */
8351 else
8352 pfp = r_pfp; /* if leaf function ptr NULL, try the root's */
8353
8354fini:
8355 if (F_DELAY_OVERR & flags) /* cmds like INQUIRY respond asap */
8356 return schedule_resp(scp, devip, errsts, pfp, 0, 0);
8357 else if ((flags & F_LONG_DELAY) && (sdebug_jdelay > 0 ||
8358 sdebug_ndelay > 10000)) {
8359 /*
8360 * Skip long delays if ndelay <= 10 microseconds. Otherwise
8361 * for Start Stop Unit (SSU) want at least 1 second delay and
8362 * if sdebug_jdelay>1 want a long delay of that many seconds.
8363 * For Synchronize Cache want 1/20 of SSU's delay.
8364 */
8365 int jdelay = (sdebug_jdelay < 2) ? 1 : sdebug_jdelay;
8366 int denom = (flags & F_SYNC_DELAY) ? 20 : 1;
8367
8368 jdelay = mult_frac(USER_HZ * jdelay, HZ, denom * USER_HZ);
8369 return schedule_resp(scp, devip, errsts, pfp, jdelay, 0);
8370 } else
8371 return schedule_resp(scp, devip, errsts, pfp, sdebug_jdelay,
8372 sdebug_ndelay);
8373check_cond:
8374 return schedule_resp(scp, devip, check_condition_result, NULL, 0, 0);
8375err_out:
8376 return schedule_resp(scp, NULL, DID_NO_CONNECT << 16, NULL, 0, 0);
8377}
8378
8379static int sdebug_init_cmd_priv(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
8380{
8381 struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmd);
8382
8383 spin_lock_init(&sdsc->lock);
8384
8385 return 0;
8386}
8387
8388static struct scsi_host_template sdebug_driver_template = {
8389 .show_info = scsi_debug_show_info,
8390 .write_info = scsi_debug_write_info,
8391 .proc_name = sdebug_proc_name,
8392 .name = "SCSI DEBUG",
8393 .info = scsi_debug_info,
8394 .slave_alloc = scsi_debug_slave_alloc,
8395 .slave_configure = scsi_debug_slave_configure,
8396 .slave_destroy = scsi_debug_slave_destroy,
8397 .ioctl = scsi_debug_ioctl,
8398 .queuecommand = scsi_debug_queuecommand,
8399 .change_queue_depth = sdebug_change_qdepth,
8400 .map_queues = sdebug_map_queues,
8401 .mq_poll = sdebug_blk_mq_poll,
8402 .eh_abort_handler = scsi_debug_abort,
8403 .eh_device_reset_handler = scsi_debug_device_reset,
8404 .eh_target_reset_handler = scsi_debug_target_reset,
8405 .eh_bus_reset_handler = scsi_debug_bus_reset,
8406 .eh_host_reset_handler = scsi_debug_host_reset,
8407 .can_queue = SDEBUG_CANQUEUE,
8408 .this_id = 7,
8409 .sg_tablesize = SG_MAX_SEGMENTS,
8410 .cmd_per_lun = DEF_CMD_PER_LUN,
8411 .max_sectors = -1U,
8412 .max_segment_size = -1U,
8413 .module = THIS_MODULE,
8414 .track_queue_depth = 1,
8415 .cmd_size = sizeof(struct sdebug_scsi_cmd),
8416 .init_cmd_priv = sdebug_init_cmd_priv,
8417 .target_alloc = sdebug_target_alloc,
8418 .target_destroy = sdebug_target_destroy,
8419};
8420
8421static int sdebug_driver_probe(struct device *dev)
8422{
8423 int error = 0;
8424 struct sdebug_host_info *sdbg_host;
8425 struct Scsi_Host *hpnt;
8426 int hprot;
8427
8428 sdbg_host = dev_to_sdebug_host(dev);
8429
8430 sdebug_driver_template.can_queue = sdebug_max_queue;
8431 sdebug_driver_template.cmd_per_lun = sdebug_max_queue;
8432 if (!sdebug_clustering)
8433 sdebug_driver_template.dma_boundary = PAGE_SIZE - 1;
8434
8435 hpnt = scsi_host_alloc(&sdebug_driver_template, 0);
8436 if (NULL == hpnt) {
8437 pr_err("scsi_host_alloc failed\n");
8438 error = -ENODEV;
8439 return error;
8440 }
8441 if (submit_queues > nr_cpu_ids) {
8442 pr_warn("%s: trim submit_queues (was %d) to nr_cpu_ids=%u\n",
8443 my_name, submit_queues, nr_cpu_ids);
8444 submit_queues = nr_cpu_ids;
8445 }
8446 /*
8447 * Decide whether to tell scsi subsystem that we want mq. The
8448 * following should give the same answer for each host.
8449 */
8450 hpnt->nr_hw_queues = submit_queues;
8451 if (sdebug_host_max_queue)
8452 hpnt->host_tagset = 1;
8453
8454 /* poll queues are possible for nr_hw_queues > 1 */
8455 if (hpnt->nr_hw_queues == 1 || (poll_queues < 1)) {
8456 pr_warn("%s: trim poll_queues to 0. poll_q/nr_hw = (%d/%d)\n",
8457 my_name, poll_queues, hpnt->nr_hw_queues);
8458 poll_queues = 0;
8459 }
8460
8461 /*
8462 * Poll queues don't need interrupts, but we need at least one I/O queue
8463 * left over for non-polled I/O.
8464 * If condition not met, trim poll_queues to 1 (just for simplicity).
8465 */
8466 if (poll_queues >= submit_queues) {
8467 if (submit_queues < 3)
8468 pr_warn("%s: trim poll_queues to 1\n", my_name);
8469 else
8470 pr_warn("%s: trim poll_queues to 1. Perhaps try poll_queues=%d\n",
8471 my_name, submit_queues - 1);
8472 poll_queues = 1;
8473 }
8474 if (poll_queues)
8475 hpnt->nr_maps = 3;
8476
8477 sdbg_host->shost = hpnt;
8478 if ((hpnt->this_id >= 0) && (sdebug_num_tgts > hpnt->this_id))
8479 hpnt->max_id = sdebug_num_tgts + 1;
8480 else
8481 hpnt->max_id = sdebug_num_tgts;
8482 /* = sdebug_max_luns; */
8483 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
8484
8485 hprot = 0;
8486
8487 switch (sdebug_dif) {
8488
8489 case T10_PI_TYPE1_PROTECTION:
8490 hprot = SHOST_DIF_TYPE1_PROTECTION;
8491 if (sdebug_dix)
8492 hprot |= SHOST_DIX_TYPE1_PROTECTION;
8493 break;
8494
8495 case T10_PI_TYPE2_PROTECTION:
8496 hprot = SHOST_DIF_TYPE2_PROTECTION;
8497 if (sdebug_dix)
8498 hprot |= SHOST_DIX_TYPE2_PROTECTION;
8499 break;
8500
8501 case T10_PI_TYPE3_PROTECTION:
8502 hprot = SHOST_DIF_TYPE3_PROTECTION;
8503 if (sdebug_dix)
8504 hprot |= SHOST_DIX_TYPE3_PROTECTION;
8505 break;
8506
8507 default:
8508 if (sdebug_dix)
8509 hprot |= SHOST_DIX_TYPE0_PROTECTION;
8510 break;
8511 }
8512
8513 scsi_host_set_prot(hpnt, hprot);
8514
8515 if (have_dif_prot || sdebug_dix)
8516 pr_info("host protection%s%s%s%s%s%s%s\n",
8517 (hprot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
8518 (hprot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
8519 (hprot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
8520 (hprot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
8521 (hprot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
8522 (hprot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
8523 (hprot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
8524
8525 if (sdebug_guard == 1)
8526 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
8527 else
8528 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
8529
8530 sdebug_verbose = !!(SDEBUG_OPT_NOISE & sdebug_opts);
8531 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & sdebug_opts);
8532 if (sdebug_every_nth) /* need stats counters for every_nth */
8533 sdebug_statistics = true;
8534 error = scsi_add_host(hpnt, &sdbg_host->dev);
8535 if (error) {
8536 pr_err("scsi_add_host failed\n");
8537 error = -ENODEV;
8538 scsi_host_put(hpnt);
8539 } else {
8540 scsi_scan_host(hpnt);
8541 }
8542
8543 return error;
8544}
8545
8546static void sdebug_driver_remove(struct device *dev)
8547{
8548 struct sdebug_host_info *sdbg_host;
8549 struct sdebug_dev_info *sdbg_devinfo, *tmp;
8550
8551 sdbg_host = dev_to_sdebug_host(dev);
8552
8553 scsi_remove_host(sdbg_host->shost);
8554
8555 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
8556 dev_list) {
8557 list_del(&sdbg_devinfo->dev_list);
8558 kfree(sdbg_devinfo->zstate);
8559 kfree(sdbg_devinfo);
8560 }
8561
8562 scsi_host_put(sdbg_host->shost);
8563}
8564
8565static const struct bus_type pseudo_lld_bus = {
8566 .name = "pseudo",
8567 .probe = sdebug_driver_probe,
8568 .remove = sdebug_driver_remove,
8569 .drv_groups = sdebug_drv_groups,
8570};