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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/*
2 * vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
3 * Copyright (C) 1992 Eric Youngdale
4 * Simulate a host adapter with 2 disks attached. Do a lot of checking
5 * to make sure that we are not getting blocks mixed up, and PANIC if
6 * anything out of the ordinary is seen.
7 * ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
8 *
9 * This version is more generic, simulating a variable number of disk
10 * (or disk like devices) sharing a common amount of RAM. To be more
11 * realistic, the simulated devices have the transport attributes of
12 * SAS disks.
13 *
14 *
15 * For documentation see http://sg.danny.cz/sg/sdebug26.html
16 *
17 * D. Gilbert (dpg) work for Magneto-Optical device test [20010421]
18 * dpg: work for devfs large number of disks [20010809]
19 * forked for lk 2.5 series [20011216, 20020101]
20 * use vmalloc() more inquiry+mode_sense [20020302]
21 * add timers for delayed responses [20020721]
22 * Patrick Mansfield <patmans@us.ibm.com> max_luns+scsi_level [20021031]
23 * Mike Anderson <andmike@us.ibm.com> sysfs work [20021118]
24 * dpg: change style of boot options to "scsi_debug.num_tgts=2" and
25 * module options to "modprobe scsi_debug num_tgts=2" [20021221]
26 */
27
28
29#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
30
31#include <linux/module.h>
32
33#include <linux/kernel.h>
34#include <linux/errno.h>
35#include <linux/timer.h>
36#include <linux/slab.h>
37#include <linux/types.h>
38#include <linux/string.h>
39#include <linux/genhd.h>
40#include <linux/fs.h>
41#include <linux/init.h>
42#include <linux/proc_fs.h>
43#include <linux/vmalloc.h>
44#include <linux/moduleparam.h>
45#include <linux/scatterlist.h>
46#include <linux/blkdev.h>
47#include <linux/crc-t10dif.h>
48#include <linux/spinlock.h>
49#include <linux/interrupt.h>
50#include <linux/atomic.h>
51#include <linux/hrtimer.h>
52
53#include <net/checksum.h>
54
55#include <asm/unaligned.h>
56
57#include <scsi/scsi.h>
58#include <scsi/scsi_cmnd.h>
59#include <scsi/scsi_device.h>
60#include <scsi/scsi_host.h>
61#include <scsi/scsicam.h>
62#include <scsi/scsi_eh.h>
63#include <scsi/scsi_tcq.h>
64#include <scsi/scsi_dbg.h>
65
66#include "sd.h"
67#include "scsi_logging.h"
68
69#define SCSI_DEBUG_VERSION "1.85"
70static const char *scsi_debug_version_date = "20141022";
71
72#define MY_NAME "scsi_debug"
73
74/* Additional Sense Code (ASC) */
75#define NO_ADDITIONAL_SENSE 0x0
76#define LOGICAL_UNIT_NOT_READY 0x4
77#define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
78#define UNRECOVERED_READ_ERR 0x11
79#define PARAMETER_LIST_LENGTH_ERR 0x1a
80#define INVALID_OPCODE 0x20
81#define LBA_OUT_OF_RANGE 0x21
82#define INVALID_FIELD_IN_CDB 0x24
83#define INVALID_FIELD_IN_PARAM_LIST 0x26
84#define UA_RESET_ASC 0x29
85#define UA_CHANGED_ASC 0x2a
86#define TARGET_CHANGED_ASC 0x3f
87#define LUNS_CHANGED_ASCQ 0x0e
88#define INSUFF_RES_ASC 0x55
89#define INSUFF_RES_ASCQ 0x3
90#define POWER_ON_RESET_ASCQ 0x0
91#define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */
92#define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */
93#define CAPACITY_CHANGED_ASCQ 0x9
94#define SAVING_PARAMS_UNSUP 0x39
95#define TRANSPORT_PROBLEM 0x4b
96#define THRESHOLD_EXCEEDED 0x5d
97#define LOW_POWER_COND_ON 0x5e
98#define MISCOMPARE_VERIFY_ASC 0x1d
99#define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */
100#define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16
101
102/* Additional Sense Code Qualifier (ASCQ) */
103#define ACK_NAK_TO 0x3
104
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_DELAY 1 /* if > 0 unit is a jiffy */
115#define DEF_DEV_SIZE_MB 8
116#define DEF_DIF 0
117#define DEF_DIX 0
118#define DEF_D_SENSE 0
119#define DEF_EVERY_NTH 0
120#define DEF_FAKE_RW 0
121#define DEF_GUARD 0
122#define DEF_HOST_LOCK 0
123#define DEF_LBPU 0
124#define DEF_LBPWS 0
125#define DEF_LBPWS10 0
126#define DEF_LBPRZ 1
127#define DEF_LOWEST_ALIGNED 0
128#define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */
129#define DEF_NO_LUN_0 0
130#define DEF_NUM_PARTS 0
131#define DEF_OPTS 0
132#define DEF_OPT_BLKS 1024
133#define DEF_PHYSBLK_EXP 0
134#define DEF_PTYPE 0
135#define DEF_REMOVABLE false
136#define DEF_SCSI_LEVEL 6 /* INQUIRY, byte2 [6->SPC-4] */
137#define DEF_SECTOR_SIZE 512
138#define DEF_UNMAP_ALIGNMENT 0
139#define DEF_UNMAP_GRANULARITY 1
140#define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
141#define DEF_UNMAP_MAX_DESC 256
142#define DEF_VIRTUAL_GB 0
143#define DEF_VPD_USE_HOSTNO 1
144#define DEF_WRITESAME_LENGTH 0xFFFF
145#define DEF_STRICT 0
146#define DELAY_OVERRIDDEN -9999
147
148/* bit mask values for scsi_debug_opts */
149#define SCSI_DEBUG_OPT_NOISE 1
150#define SCSI_DEBUG_OPT_MEDIUM_ERR 2
151#define SCSI_DEBUG_OPT_TIMEOUT 4
152#define SCSI_DEBUG_OPT_RECOVERED_ERR 8
153#define SCSI_DEBUG_OPT_TRANSPORT_ERR 16
154#define SCSI_DEBUG_OPT_DIF_ERR 32
155#define SCSI_DEBUG_OPT_DIX_ERR 64
156#define SCSI_DEBUG_OPT_MAC_TIMEOUT 128
157#define SCSI_DEBUG_OPT_SHORT_TRANSFER 0x100
158#define SCSI_DEBUG_OPT_Q_NOISE 0x200
159#define SCSI_DEBUG_OPT_ALL_TSF 0x400
160#define SCSI_DEBUG_OPT_RARE_TSF 0x800
161#define SCSI_DEBUG_OPT_N_WCE 0x1000
162#define SCSI_DEBUG_OPT_RESET_NOISE 0x2000
163#define SCSI_DEBUG_OPT_NO_CDB_NOISE 0x4000
164#define SCSI_DEBUG_OPT_ALL_NOISE (0x1 | 0x200 | 0x2000)
165/* When "every_nth" > 0 then modulo "every_nth" commands:
166 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
167 * - a RECOVERED_ERROR is simulated on successful read and write
168 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
169 * - a TRANSPORT_ERROR is simulated on successful read and write
170 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
171 *
172 * When "every_nth" < 0 then after "- every_nth" commands:
173 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
174 * - a RECOVERED_ERROR is simulated on successful read and write
175 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
176 * - a TRANSPORT_ERROR is simulated on successful read and write
177 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
178 * This will continue until some other action occurs (e.g. the user
179 * writing a new value (other than -1 or 1) to every_nth via sysfs).
180 */
181
182/* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs)are returned in
183 * priority order. In the subset implemented here lower numbers have higher
184 * priority. The UA numbers should be a sequence starting from 0 with
185 * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */
186#define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */
187#define SDEBUG_UA_BUS_RESET 1
188#define SDEBUG_UA_MODE_CHANGED 2
189#define SDEBUG_UA_CAPACITY_CHANGED 3
190#define SDEBUG_UA_LUNS_CHANGED 4
191#define SDEBUG_UA_MICROCODE_CHANGED 5 /* simulate firmware change */
192#define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 6
193#define SDEBUG_NUM_UAS 7
194
195/* for check_readiness() */
196#define UAS_ONLY 1 /* check for UAs only */
197#define UAS_TUR 0 /* if no UAs then check if media access possible */
198
199/* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
200 * sector on read commands: */
201#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
202#define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
203
204/* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
205 * or "peripheral device" addressing (value 0) */
206#define SAM2_LUN_ADDRESS_METHOD 0
207
208/* SCSI_DEBUG_CANQUEUE is the maximum number of commands that can be queued
209 * (for response) at one time. Can be reduced by max_queue option. Command
210 * responses are not queued when delay=0 and ndelay=0. The per-device
211 * DEF_CMD_PER_LUN can be changed via sysfs:
212 * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth but cannot exceed
213 * SCSI_DEBUG_CANQUEUE. */
214#define SCSI_DEBUG_CANQUEUE_WORDS 9 /* a WORD is bits in a long */
215#define SCSI_DEBUG_CANQUEUE (SCSI_DEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
216#define DEF_CMD_PER_LUN 255
217
218#if DEF_CMD_PER_LUN > SCSI_DEBUG_CANQUEUE
219#warning "Expect DEF_CMD_PER_LUN <= SCSI_DEBUG_CANQUEUE"
220#endif
221
222/* SCSI opcodes (first byte of cdb) mapped onto these indexes */
223enum sdeb_opcode_index {
224 SDEB_I_INVALID_OPCODE = 0,
225 SDEB_I_INQUIRY = 1,
226 SDEB_I_REPORT_LUNS = 2,
227 SDEB_I_REQUEST_SENSE = 3,
228 SDEB_I_TEST_UNIT_READY = 4,
229 SDEB_I_MODE_SENSE = 5, /* 6, 10 */
230 SDEB_I_MODE_SELECT = 6, /* 6, 10 */
231 SDEB_I_LOG_SENSE = 7,
232 SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */
233 SDEB_I_READ = 9, /* 6, 10, 12, 16 */
234 SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */
235 SDEB_I_START_STOP = 11,
236 SDEB_I_SERV_ACT_IN = 12, /* 12, 16 */
237 SDEB_I_SERV_ACT_OUT = 13, /* 12, 16 */
238 SDEB_I_MAINT_IN = 14,
239 SDEB_I_MAINT_OUT = 15,
240 SDEB_I_VERIFY = 16, /* 10 only */
241 SDEB_I_VARIABLE_LEN = 17,
242 SDEB_I_RESERVE = 18, /* 6, 10 */
243 SDEB_I_RELEASE = 19, /* 6, 10 */
244 SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
245 SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */
246 SDEB_I_ATA_PT = 22, /* 12, 16 */
247 SDEB_I_SEND_DIAG = 23,
248 SDEB_I_UNMAP = 24,
249 SDEB_I_XDWRITEREAD = 25, /* 10 only */
250 SDEB_I_WRITE_BUFFER = 26,
251 SDEB_I_WRITE_SAME = 27, /* 10, 16 */
252 SDEB_I_SYNC_CACHE = 28, /* 10 only */
253 SDEB_I_COMP_WRITE = 29,
254 SDEB_I_LAST_ELEMENT = 30, /* keep this last */
255};
256
257static const unsigned char opcode_ind_arr[256] = {
258/* 0x0; 0x0->0x1f: 6 byte cdbs */
259 SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE,
260 0, 0, 0, 0,
261 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0,
262 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
263 SDEB_I_RELEASE,
264 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG,
265 SDEB_I_ALLOW_REMOVAL, 0,
266/* 0x20; 0x20->0x3f: 10 byte cdbs */
267 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0,
268 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY,
269 0, 0, 0, 0, 0, SDEB_I_SYNC_CACHE, 0, 0,
270 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0,
271/* 0x40; 0x40->0x5f: 10 byte cdbs */
272 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0,
273 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0,
274 0, 0, 0, SDEB_I_XDWRITEREAD, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
275 SDEB_I_RELEASE,
276 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0,
277/* 0x60; 0x60->0x7d are reserved */
278 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
279 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
280 0, SDEB_I_VARIABLE_LEN,
281/* 0x80; 0x80->0x9f: 16 byte cdbs */
282 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0,
283 SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0, 0, 0, 0, 0,
284 0, 0, 0, SDEB_I_WRITE_SAME, 0, 0, 0, 0,
285 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN, SDEB_I_SERV_ACT_OUT,
286/* 0xa0; 0xa0->0xbf: 12 byte cdbs */
287 SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN,
288 SDEB_I_MAINT_OUT, 0, 0, 0,
289 SDEB_I_READ, SDEB_I_SERV_ACT_OUT, SDEB_I_WRITE, SDEB_I_SERV_ACT_IN,
290 0, 0, 0, 0,
291 0, 0, 0, 0, 0, 0, 0, 0,
292 0, 0, 0, 0, 0, 0, 0, 0,
293/* 0xc0; 0xc0->0xff: vendor specific */
294 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
295 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
296 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
297 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
298};
299
300#define F_D_IN 1
301#define F_D_OUT 2
302#define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */
303#define F_D_UNKN 8
304#define F_RL_WLUN_OK 0x10
305#define F_SKIP_UA 0x20
306#define F_DELAY_OVERR 0x40
307#define F_SA_LOW 0x80 /* cdb byte 1, bits 4 to 0 */
308#define F_SA_HIGH 0x100 /* as used by variable length cdbs */
309#define F_INV_OP 0x200
310#define F_FAKE_RW 0x400
311#define F_M_ACCESS 0x800 /* media access */
312
313#define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR)
314#define FF_DIRECT_IO (F_M_ACCESS | F_FAKE_RW)
315#define FF_SA (F_SA_HIGH | F_SA_LOW)
316
317struct sdebug_dev_info;
318static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *);
319static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *);
320static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *);
321static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
322static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *);
323static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
324static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
325static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
326static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
327static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
328static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
329static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
330static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *);
331static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *);
332static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *);
333static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *);
334static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *);
335static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *);
336static int resp_xdwriteread_10(struct scsi_cmnd *, struct sdebug_dev_info *);
337static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
338static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *);
339
340struct opcode_info_t {
341 u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff
342 * for terminating element */
343 u8 opcode; /* if num_attached > 0, preferred */
344 u16 sa; /* service action */
345 u32 flags; /* OR-ed set of SDEB_F_* */
346 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
347 const struct opcode_info_t *arrp; /* num_attached elements or NULL */
348 u8 len_mask[16]; /* len=len_mask[0], then mask for cdb[1]... */
349 /* ignore cdb bytes after position 15 */
350};
351
352static const struct opcode_info_t msense_iarr[1] = {
353 {0, 0x1a, 0, F_D_IN, NULL, NULL,
354 {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
355};
356
357static const struct opcode_info_t mselect_iarr[1] = {
358 {0, 0x15, 0, F_D_OUT, NULL, NULL,
359 {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
360};
361
362static const struct opcode_info_t read_iarr[3] = {
363 {0, 0x28, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL,/* READ(10) */
364 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
365 0, 0, 0, 0} },
366 {0, 0x8, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL, /* READ(6) */
367 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
368 {0, 0xa8, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL,/* READ(12) */
369 {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x9f,
370 0xc7, 0, 0, 0, 0} },
371};
372
373static const struct opcode_info_t write_iarr[3] = {
374 {0, 0x2a, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 10 */
375 {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
376 0, 0, 0, 0} },
377 {0, 0xa, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 6 */
378 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
379 {0, 0xaa, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 12 */
380 {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x9f,
381 0xc7, 0, 0, 0, 0} },
382};
383
384static const struct opcode_info_t sa_in_iarr[1] = {
385 {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL,
386 {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
387 0xff, 0xff, 0xff, 0, 0xc7} },
388};
389
390static const struct opcode_info_t vl_iarr[1] = { /* VARIABLE LENGTH */
391 {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_DIRECT_IO, resp_write_dt0,
392 NULL, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0xb, 0xfa,
393 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
394};
395
396static const struct opcode_info_t maint_in_iarr[2] = {
397 {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL,
398 {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
399 0xc7, 0, 0, 0, 0} },
400 {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL,
401 {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
402 0, 0} },
403};
404
405static const struct opcode_info_t write_same_iarr[1] = {
406 {0, 0x93, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, resp_write_same_16, NULL,
407 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
408 0xff, 0xff, 0xff, 0x1f, 0xc7} },
409};
410
411static const struct opcode_info_t reserve_iarr[1] = {
412 {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */
413 {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
414};
415
416static const struct opcode_info_t release_iarr[1] = {
417 {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */
418 {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
419};
420
421
422/* This array is accessed via SDEB_I_* values. Make sure all are mapped,
423 * plus the terminating elements for logic that scans this table such as
424 * REPORT SUPPORTED OPERATION CODES. */
425static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEMENT + 1] = {
426/* 0 */
427 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL,
428 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
429 {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL,
430 {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
431 {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL,
432 {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
433 0, 0} },
434 {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL,
435 {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
436 {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */
437 {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
438 {1, 0x5a, 0, F_D_IN, resp_mode_sense, msense_iarr,
439 {10, 0xf8, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
440 0} },
441 {1, 0x55, 0, F_D_OUT, resp_mode_select, mselect_iarr,
442 {10, 0xf1, 0, 0, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
443 {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL,
444 {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0,
445 0, 0, 0} },
446 {0, 0x25, 0, F_D_IN, resp_readcap, NULL,
447 {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0,
448 0, 0} },
449 {3, 0x88, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, read_iarr,
450 {16, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
451 0xff, 0xff, 0xff, 0x9f, 0xc7} }, /* READ(16) */
452/* 10 */
453 {3, 0x8a, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, write_iarr,
454 {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
455 0xff, 0xff, 0xff, 0x9f, 0xc7} }, /* WRITE(16) */
456 {0, 0x1b, 0, 0, resp_start_stop, NULL, /* START STOP UNIT */
457 {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
458 {1, 0x9e, 0x10, F_SA_LOW | F_D_IN, resp_readcap16, sa_in_iarr,
459 {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
460 0xff, 0xff, 0xff, 0x1, 0xc7} }, /* READ CAPACITY(16) */
461 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* SA OUT */
462 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
463 {2, 0xa3, 0xa, F_SA_LOW | F_D_IN, resp_report_tgtpgs, maint_in_iarr,
464 {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, 0,
465 0} },
466 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */
467 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
468 {0, 0x2f, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, NULL, NULL, /* VERIFY(10) */
469 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7,
470 0, 0, 0, 0, 0, 0} },
471 {1, 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_DIRECT_IO, resp_read_dt0,
472 vl_iarr, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0x9, 0xfe, 0,
473 0xff, 0xff, 0xff, 0xff} },/* VARIABLE LENGTH, READ(32) */
474 {1, 0x56, 0, F_D_OUT, NULL, reserve_iarr, /* RESERVE(10) */
475 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
476 0} },
477 {1, 0x57, 0, F_D_OUT, NULL, release_iarr, /* RELEASE(10) */
478 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
479 0} },
480/* 20 */
481 {0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */
482 {6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
483 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */
484 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
485 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */
486 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
487 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */
488 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
489 {0, 0x42, 0, F_D_OUT | FF_DIRECT_IO, resp_unmap, NULL, /* UNMAP */
490 {10, 0x1, 0, 0, 0, 0, 0x1f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
491 {0, 0x53, 0, F_D_IN | F_D_OUT | FF_DIRECT_IO, resp_xdwriteread_10,
492 NULL, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7,
493 0, 0, 0, 0, 0, 0} },
494 {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL,
495 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0,
496 0, 0, 0, 0} }, /* WRITE_BUFFER */
497 {1, 0x41, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, resp_write_same_10,
498 write_same_iarr, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff,
499 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
500 {0, 0x35, 0, F_DELAY_OVERR | FF_DIRECT_IO, NULL, NULL, /* SYNC_CACHE */
501 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
502 0, 0, 0, 0} },
503 {0, 0x89, 0, F_D_OUT | FF_DIRECT_IO, resp_comp_write, NULL,
504 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
505 0, 0xff, 0x1f, 0xc7} }, /* COMPARE AND WRITE */
506
507/* 30 */
508 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */
509 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
510};
511
512struct sdebug_scmd_extra_t {
513 bool inj_recovered;
514 bool inj_transport;
515 bool inj_dif;
516 bool inj_dix;
517 bool inj_short;
518};
519
520static int scsi_debug_add_host = DEF_NUM_HOST;
521static int scsi_debug_ato = DEF_ATO;
522static int scsi_debug_delay = DEF_DELAY;
523static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB;
524static int scsi_debug_dif = DEF_DIF;
525static int scsi_debug_dix = DEF_DIX;
526static int scsi_debug_dsense = DEF_D_SENSE;
527static int scsi_debug_every_nth = DEF_EVERY_NTH;
528static int scsi_debug_fake_rw = DEF_FAKE_RW;
529static unsigned int scsi_debug_guard = DEF_GUARD;
530static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED;
531static int scsi_debug_max_luns = DEF_MAX_LUNS;
532static int scsi_debug_max_queue = SCSI_DEBUG_CANQUEUE;
533static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */
534static int scsi_debug_ndelay = DEF_NDELAY;
535static int scsi_debug_no_lun_0 = DEF_NO_LUN_0;
536static int scsi_debug_no_uld = 0;
537static int scsi_debug_num_parts = DEF_NUM_PARTS;
538static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */
539static int scsi_debug_opt_blks = DEF_OPT_BLKS;
540static int scsi_debug_opts = DEF_OPTS;
541static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP;
542static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */
543static int scsi_debug_scsi_level = DEF_SCSI_LEVEL;
544static int scsi_debug_sector_size = DEF_SECTOR_SIZE;
545static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB;
546static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
547static unsigned int scsi_debug_lbpu = DEF_LBPU;
548static unsigned int scsi_debug_lbpws = DEF_LBPWS;
549static unsigned int scsi_debug_lbpws10 = DEF_LBPWS10;
550static unsigned int scsi_debug_lbprz = DEF_LBPRZ;
551static unsigned int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
552static unsigned int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY;
553static unsigned int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
554static unsigned int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
555static unsigned int scsi_debug_write_same_length = DEF_WRITESAME_LENGTH;
556static bool scsi_debug_removable = DEF_REMOVABLE;
557static bool scsi_debug_clustering;
558static bool scsi_debug_host_lock = DEF_HOST_LOCK;
559static bool scsi_debug_strict = DEF_STRICT;
560static bool sdebug_any_injecting_opt;
561
562static atomic_t sdebug_cmnd_count;
563static atomic_t sdebug_completions;
564static atomic_t sdebug_a_tsf; /* counter of 'almost' TSFs */
565
566#define DEV_READONLY(TGT) (0)
567
568static unsigned int sdebug_store_sectors;
569static sector_t sdebug_capacity; /* in sectors */
570
571/* old BIOS stuff, kernel may get rid of them but some mode sense pages
572 may still need them */
573static int sdebug_heads; /* heads per disk */
574static int sdebug_cylinders_per; /* cylinders per surface */
575static int sdebug_sectors_per; /* sectors per cylinder */
576
577#define SDEBUG_MAX_PARTS 4
578
579#define SCSI_DEBUG_MAX_CMD_LEN 32
580
581static unsigned int scsi_debug_lbp(void)
582{
583 return ((0 == scsi_debug_fake_rw) &&
584 (scsi_debug_lbpu | scsi_debug_lbpws | scsi_debug_lbpws10));
585}
586
587struct sdebug_dev_info {
588 struct list_head dev_list;
589 unsigned int channel;
590 unsigned int target;
591 u64 lun;
592 struct sdebug_host_info *sdbg_host;
593 unsigned long uas_bm[1];
594 atomic_t num_in_q;
595 char stopped; /* TODO: should be atomic */
596 bool used;
597};
598
599struct sdebug_host_info {
600 struct list_head host_list;
601 struct Scsi_Host *shost;
602 struct device dev;
603 struct list_head dev_info_list;
604};
605
606#define to_sdebug_host(d) \
607 container_of(d, struct sdebug_host_info, dev)
608
609static LIST_HEAD(sdebug_host_list);
610static DEFINE_SPINLOCK(sdebug_host_list_lock);
611
612
613struct sdebug_hrtimer { /* ... is derived from hrtimer */
614 struct hrtimer hrt; /* must be first element */
615 int qa_indx;
616};
617
618struct sdebug_queued_cmd {
619 /* in_use flagged by a bit in queued_in_use_bm[] */
620 struct timer_list *cmnd_timerp;
621 struct tasklet_struct *tletp;
622 struct sdebug_hrtimer *sd_hrtp;
623 struct scsi_cmnd * a_cmnd;
624};
625static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
626static unsigned long queued_in_use_bm[SCSI_DEBUG_CANQUEUE_WORDS];
627
628
629static unsigned char * fake_storep; /* ramdisk storage */
630static struct sd_dif_tuple *dif_storep; /* protection info */
631static void *map_storep; /* provisioning map */
632
633static unsigned long map_size;
634static int num_aborts;
635static int num_dev_resets;
636static int num_target_resets;
637static int num_bus_resets;
638static int num_host_resets;
639static int dix_writes;
640static int dix_reads;
641static int dif_errors;
642
643static DEFINE_SPINLOCK(queued_arr_lock);
644static DEFINE_RWLOCK(atomic_rw);
645
646static char sdebug_proc_name[] = MY_NAME;
647static const char *my_name = MY_NAME;
648
649static struct bus_type pseudo_lld_bus;
650
651static struct device_driver sdebug_driverfs_driver = {
652 .name = sdebug_proc_name,
653 .bus = &pseudo_lld_bus,
654};
655
656static const int check_condition_result =
657 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
658
659static const int illegal_condition_result =
660 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
661
662static const int device_qfull_result =
663 (DID_OK << 16) | (COMMAND_COMPLETE << 8) | SAM_STAT_TASK_SET_FULL;
664
665static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
666 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
667 0, 0, 0, 0};
668static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
669 0, 0, 0x2, 0x4b};
670static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
671 0, 0, 0x0, 0x0};
672
673static void *fake_store(unsigned long long lba)
674{
675 lba = do_div(lba, sdebug_store_sectors);
676
677 return fake_storep + lba * scsi_debug_sector_size;
678}
679
680static struct sd_dif_tuple *dif_store(sector_t sector)
681{
682 sector = sector_div(sector, sdebug_store_sectors);
683
684 return dif_storep + sector;
685}
686
687static int sdebug_add_adapter(void);
688static void sdebug_remove_adapter(void);
689
690static void sdebug_max_tgts_luns(void)
691{
692 struct sdebug_host_info *sdbg_host;
693 struct Scsi_Host *hpnt;
694
695 spin_lock(&sdebug_host_list_lock);
696 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
697 hpnt = sdbg_host->shost;
698 if ((hpnt->this_id >= 0) &&
699 (scsi_debug_num_tgts > hpnt->this_id))
700 hpnt->max_id = scsi_debug_num_tgts + 1;
701 else
702 hpnt->max_id = scsi_debug_num_tgts;
703 /* scsi_debug_max_luns; */
704 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
705 }
706 spin_unlock(&sdebug_host_list_lock);
707}
708
709enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
710
711/* Set in_bit to -1 to indicate no bit position of invalid field */
712static void
713mk_sense_invalid_fld(struct scsi_cmnd *scp, enum sdeb_cmd_data c_d,
714 int in_byte, int in_bit)
715{
716 unsigned char *sbuff;
717 u8 sks[4];
718 int sl, asc;
719
720 sbuff = scp->sense_buffer;
721 if (!sbuff) {
722 sdev_printk(KERN_ERR, scp->device,
723 "%s: sense_buffer is NULL\n", __func__);
724 return;
725 }
726 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
727 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
728 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, ILLEGAL_REQUEST,
729 asc, 0);
730 memset(sks, 0, sizeof(sks));
731 sks[0] = 0x80;
732 if (c_d)
733 sks[0] |= 0x40;
734 if (in_bit >= 0) {
735 sks[0] |= 0x8;
736 sks[0] |= 0x7 & in_bit;
737 }
738 put_unaligned_be16(in_byte, sks + 1);
739 if (scsi_debug_dsense) {
740 sl = sbuff[7] + 8;
741 sbuff[7] = sl;
742 sbuff[sl] = 0x2;
743 sbuff[sl + 1] = 0x6;
744 memcpy(sbuff + sl + 4, sks, 3);
745 } else
746 memcpy(sbuff + 15, sks, 3);
747 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
748 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
749 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
750 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
751}
752
753static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
754{
755 unsigned char *sbuff;
756
757 sbuff = scp->sense_buffer;
758 if (!sbuff) {
759 sdev_printk(KERN_ERR, scp->device,
760 "%s: sense_buffer is NULL\n", __func__);
761 return;
762 }
763 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
764
765 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, key, asc, asq);
766
767 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
768 sdev_printk(KERN_INFO, scp->device,
769 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
770 my_name, key, asc, asq);
771}
772
773static void
774mk_sense_invalid_opcode(struct scsi_cmnd *scp)
775{
776 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
777}
778
779static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
780{
781 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
782 if (0x1261 == cmd)
783 sdev_printk(KERN_INFO, dev,
784 "%s: BLKFLSBUF [0x1261]\n", __func__);
785 else if (0x5331 == cmd)
786 sdev_printk(KERN_INFO, dev,
787 "%s: CDROM_GET_CAPABILITY [0x5331]\n",
788 __func__);
789 else
790 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
791 __func__, cmd);
792 }
793 return -EINVAL;
794 /* return -ENOTTY; // correct return but upsets fdisk */
795}
796
797static void clear_luns_changed_on_target(struct sdebug_dev_info *devip)
798{
799 struct sdebug_host_info *sdhp;
800 struct sdebug_dev_info *dp;
801
802 spin_lock(&sdebug_host_list_lock);
803 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
804 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
805 if ((devip->sdbg_host == dp->sdbg_host) &&
806 (devip->target == dp->target))
807 clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
808 }
809 }
810 spin_unlock(&sdebug_host_list_lock);
811}
812
813static int check_readiness(struct scsi_cmnd *SCpnt, int uas_only,
814 struct sdebug_dev_info * devip)
815{
816 int k;
817 bool debug = !!(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts);
818
819 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
820 if (k != SDEBUG_NUM_UAS) {
821 const char *cp = NULL;
822
823 switch (k) {
824 case SDEBUG_UA_POR:
825 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
826 UA_RESET_ASC, POWER_ON_RESET_ASCQ);
827 if (debug)
828 cp = "power on reset";
829 break;
830 case SDEBUG_UA_BUS_RESET:
831 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
832 UA_RESET_ASC, BUS_RESET_ASCQ);
833 if (debug)
834 cp = "bus reset";
835 break;
836 case SDEBUG_UA_MODE_CHANGED:
837 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
838 UA_CHANGED_ASC, MODE_CHANGED_ASCQ);
839 if (debug)
840 cp = "mode parameters changed";
841 break;
842 case SDEBUG_UA_CAPACITY_CHANGED:
843 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
844 UA_CHANGED_ASC, CAPACITY_CHANGED_ASCQ);
845 if (debug)
846 cp = "capacity data changed";
847 break;
848 case SDEBUG_UA_MICROCODE_CHANGED:
849 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
850 TARGET_CHANGED_ASC, MICROCODE_CHANGED_ASCQ);
851 if (debug)
852 cp = "microcode has been changed";
853 break;
854 case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET:
855 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
856 TARGET_CHANGED_ASC,
857 MICROCODE_CHANGED_WO_RESET_ASCQ);
858 if (debug)
859 cp = "microcode has been changed without reset";
860 break;
861 case SDEBUG_UA_LUNS_CHANGED:
862 /*
863 * SPC-3 behavior is to report a UNIT ATTENTION with
864 * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN
865 * on the target, until a REPORT LUNS command is
866 * received. SPC-4 behavior is to report it only once.
867 * NOTE: scsi_debug_scsi_level does not use the same
868 * values as struct scsi_device->scsi_level.
869 */
870 if (scsi_debug_scsi_level >= 6) /* SPC-4 and above */
871 clear_luns_changed_on_target(devip);
872 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
873 TARGET_CHANGED_ASC,
874 LUNS_CHANGED_ASCQ);
875 if (debug)
876 cp = "reported luns data has changed";
877 break;
878 default:
879 pr_warn("%s: unexpected unit attention code=%d\n",
880 __func__, k);
881 if (debug)
882 cp = "unknown";
883 break;
884 }
885 clear_bit(k, devip->uas_bm);
886 if (debug)
887 sdev_printk(KERN_INFO, SCpnt->device,
888 "%s reports: Unit attention: %s\n",
889 my_name, cp);
890 return check_condition_result;
891 }
892 if ((UAS_TUR == uas_only) && devip->stopped) {
893 mk_sense_buffer(SCpnt, NOT_READY, LOGICAL_UNIT_NOT_READY,
894 0x2);
895 if (debug)
896 sdev_printk(KERN_INFO, SCpnt->device,
897 "%s reports: Not ready: %s\n", my_name,
898 "initializing command required");
899 return check_condition_result;
900 }
901 return 0;
902}
903
904/* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */
905static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
906 int arr_len)
907{
908 int act_len;
909 struct scsi_data_buffer *sdb = scsi_in(scp);
910
911 if (!sdb->length)
912 return 0;
913 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
914 return (DID_ERROR << 16);
915
916 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
917 arr, arr_len);
918 sdb->resid = scsi_bufflen(scp) - act_len;
919
920 return 0;
921}
922
923/* Returns number of bytes fetched into 'arr' or -1 if error. */
924static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
925 int arr_len)
926{
927 if (!scsi_bufflen(scp))
928 return 0;
929 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE))
930 return -1;
931
932 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
933}
934
935
936static const char * inq_vendor_id = "Linux ";
937static const char * inq_product_id = "scsi_debug ";
938static const char *inq_product_rev = "0184"; /* version less '.' */
939
940/* Device identification VPD page. Returns number of bytes placed in arr */
941static int inquiry_evpd_83(unsigned char * arr, int port_group_id,
942 int target_dev_id, int dev_id_num,
943 const char * dev_id_str,
944 int dev_id_str_len)
945{
946 int num, port_a;
947 char b[32];
948
949 port_a = target_dev_id + 1;
950 /* T10 vendor identifier field format (faked) */
951 arr[0] = 0x2; /* ASCII */
952 arr[1] = 0x1;
953 arr[2] = 0x0;
954 memcpy(&arr[4], inq_vendor_id, 8);
955 memcpy(&arr[12], inq_product_id, 16);
956 memcpy(&arr[28], dev_id_str, dev_id_str_len);
957 num = 8 + 16 + dev_id_str_len;
958 arr[3] = num;
959 num += 4;
960 if (dev_id_num >= 0) {
961 /* NAA-5, Logical unit identifier (binary) */
962 arr[num++] = 0x1; /* binary (not necessarily sas) */
963 arr[num++] = 0x3; /* PIV=0, lu, naa */
964 arr[num++] = 0x0;
965 arr[num++] = 0x8;
966 arr[num++] = 0x53; /* naa-5 ieee company id=0x333333 (fake) */
967 arr[num++] = 0x33;
968 arr[num++] = 0x33;
969 arr[num++] = 0x30;
970 arr[num++] = (dev_id_num >> 24);
971 arr[num++] = (dev_id_num >> 16) & 0xff;
972 arr[num++] = (dev_id_num >> 8) & 0xff;
973 arr[num++] = dev_id_num & 0xff;
974 /* Target relative port number */
975 arr[num++] = 0x61; /* proto=sas, binary */
976 arr[num++] = 0x94; /* PIV=1, target port, rel port */
977 arr[num++] = 0x0; /* reserved */
978 arr[num++] = 0x4; /* length */
979 arr[num++] = 0x0; /* reserved */
980 arr[num++] = 0x0; /* reserved */
981 arr[num++] = 0x0;
982 arr[num++] = 0x1; /* relative port A */
983 }
984 /* NAA-5, Target port identifier */
985 arr[num++] = 0x61; /* proto=sas, binary */
986 arr[num++] = 0x93; /* piv=1, target port, naa */
987 arr[num++] = 0x0;
988 arr[num++] = 0x8;
989 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
990 arr[num++] = 0x22;
991 arr[num++] = 0x22;
992 arr[num++] = 0x20;
993 arr[num++] = (port_a >> 24);
994 arr[num++] = (port_a >> 16) & 0xff;
995 arr[num++] = (port_a >> 8) & 0xff;
996 arr[num++] = port_a & 0xff;
997 /* NAA-5, Target port group identifier */
998 arr[num++] = 0x61; /* proto=sas, binary */
999 arr[num++] = 0x95; /* piv=1, target port group id */
1000 arr[num++] = 0x0;
1001 arr[num++] = 0x4;
1002 arr[num++] = 0;
1003 arr[num++] = 0;
1004 arr[num++] = (port_group_id >> 8) & 0xff;
1005 arr[num++] = port_group_id & 0xff;
1006 /* NAA-5, Target device identifier */
1007 arr[num++] = 0x61; /* proto=sas, binary */
1008 arr[num++] = 0xa3; /* piv=1, target device, naa */
1009 arr[num++] = 0x0;
1010 arr[num++] = 0x8;
1011 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
1012 arr[num++] = 0x22;
1013 arr[num++] = 0x22;
1014 arr[num++] = 0x20;
1015 arr[num++] = (target_dev_id >> 24);
1016 arr[num++] = (target_dev_id >> 16) & 0xff;
1017 arr[num++] = (target_dev_id >> 8) & 0xff;
1018 arr[num++] = target_dev_id & 0xff;
1019 /* SCSI name string: Target device identifier */
1020 arr[num++] = 0x63; /* proto=sas, UTF-8 */
1021 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
1022 arr[num++] = 0x0;
1023 arr[num++] = 24;
1024 memcpy(arr + num, "naa.52222220", 12);
1025 num += 12;
1026 snprintf(b, sizeof(b), "%08X", target_dev_id);
1027 memcpy(arr + num, b, 8);
1028 num += 8;
1029 memset(arr + num, 0, 4);
1030 num += 4;
1031 return num;
1032}
1033
1034
1035static unsigned char vpd84_data[] = {
1036/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
1037 0x22,0x22,0x22,0x0,0xbb,0x1,
1038 0x22,0x22,0x22,0x0,0xbb,0x2,
1039};
1040
1041/* Software interface identification VPD page */
1042static int inquiry_evpd_84(unsigned char * arr)
1043{
1044 memcpy(arr, vpd84_data, sizeof(vpd84_data));
1045 return sizeof(vpd84_data);
1046}
1047
1048/* Management network addresses VPD page */
1049static int inquiry_evpd_85(unsigned char * arr)
1050{
1051 int num = 0;
1052 const char * na1 = "https://www.kernel.org/config";
1053 const char * na2 = "http://www.kernel.org/log";
1054 int plen, olen;
1055
1056 arr[num++] = 0x1; /* lu, storage config */
1057 arr[num++] = 0x0; /* reserved */
1058 arr[num++] = 0x0;
1059 olen = strlen(na1);
1060 plen = olen + 1;
1061 if (plen % 4)
1062 plen = ((plen / 4) + 1) * 4;
1063 arr[num++] = plen; /* length, null termianted, padded */
1064 memcpy(arr + num, na1, olen);
1065 memset(arr + num + olen, 0, plen - olen);
1066 num += plen;
1067
1068 arr[num++] = 0x4; /* lu, logging */
1069 arr[num++] = 0x0; /* reserved */
1070 arr[num++] = 0x0;
1071 olen = strlen(na2);
1072 plen = olen + 1;
1073 if (plen % 4)
1074 plen = ((plen / 4) + 1) * 4;
1075 arr[num++] = plen; /* length, null terminated, padded */
1076 memcpy(arr + num, na2, olen);
1077 memset(arr + num + olen, 0, plen - olen);
1078 num += plen;
1079
1080 return num;
1081}
1082
1083/* SCSI ports VPD page */
1084static int inquiry_evpd_88(unsigned char * arr, int target_dev_id)
1085{
1086 int num = 0;
1087 int port_a, port_b;
1088
1089 port_a = target_dev_id + 1;
1090 port_b = port_a + 1;
1091 arr[num++] = 0x0; /* reserved */
1092 arr[num++] = 0x0; /* reserved */
1093 arr[num++] = 0x0;
1094 arr[num++] = 0x1; /* relative port 1 (primary) */
1095 memset(arr + num, 0, 6);
1096 num += 6;
1097 arr[num++] = 0x0;
1098 arr[num++] = 12; /* length tp descriptor */
1099 /* naa-5 target port identifier (A) */
1100 arr[num++] = 0x61; /* proto=sas, binary */
1101 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1102 arr[num++] = 0x0; /* reserved */
1103 arr[num++] = 0x8; /* length */
1104 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
1105 arr[num++] = 0x22;
1106 arr[num++] = 0x22;
1107 arr[num++] = 0x20;
1108 arr[num++] = (port_a >> 24);
1109 arr[num++] = (port_a >> 16) & 0xff;
1110 arr[num++] = (port_a >> 8) & 0xff;
1111 arr[num++] = port_a & 0xff;
1112
1113 arr[num++] = 0x0; /* reserved */
1114 arr[num++] = 0x0; /* reserved */
1115 arr[num++] = 0x0;
1116 arr[num++] = 0x2; /* relative port 2 (secondary) */
1117 memset(arr + num, 0, 6);
1118 num += 6;
1119 arr[num++] = 0x0;
1120 arr[num++] = 12; /* length tp descriptor */
1121 /* naa-5 target port identifier (B) */
1122 arr[num++] = 0x61; /* proto=sas, binary */
1123 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1124 arr[num++] = 0x0; /* reserved */
1125 arr[num++] = 0x8; /* length */
1126 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
1127 arr[num++] = 0x22;
1128 arr[num++] = 0x22;
1129 arr[num++] = 0x20;
1130 arr[num++] = (port_b >> 24);
1131 arr[num++] = (port_b >> 16) & 0xff;
1132 arr[num++] = (port_b >> 8) & 0xff;
1133 arr[num++] = port_b & 0xff;
1134
1135 return num;
1136}
1137
1138
1139static unsigned char vpd89_data[] = {
1140/* from 4th byte */ 0,0,0,0,
1141'l','i','n','u','x',' ',' ',' ',
1142'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
1143'1','2','3','4',
11440x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
11450xec,0,0,0,
11460x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
11470,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
11480x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
11490x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
11500x53,0x41,
11510x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
11520x20,0x20,
11530x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
11540x10,0x80,
11550,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
11560x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
11570x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
11580,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
11590x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
11600x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
11610,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
11620,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11630,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11640,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11650x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
11660,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
11670xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
11680,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
11690,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11700,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11710,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11720,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11730,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11740,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11750,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11760,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11770,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11780,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11790,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11800,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
1181};
1182
1183/* ATA Information VPD page */
1184static int inquiry_evpd_89(unsigned char * arr)
1185{
1186 memcpy(arr, vpd89_data, sizeof(vpd89_data));
1187 return sizeof(vpd89_data);
1188}
1189
1190
1191static unsigned char vpdb0_data[] = {
1192 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
1193 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1194 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1195 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1196};
1197
1198/* Block limits VPD page (SBC-3) */
1199static int inquiry_evpd_b0(unsigned char * arr)
1200{
1201 unsigned int gran;
1202
1203 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
1204
1205 /* Optimal transfer length granularity */
1206 gran = 1 << scsi_debug_physblk_exp;
1207 arr[2] = (gran >> 8) & 0xff;
1208 arr[3] = gran & 0xff;
1209
1210 /* Maximum Transfer Length */
1211 if (sdebug_store_sectors > 0x400) {
1212 arr[4] = (sdebug_store_sectors >> 24) & 0xff;
1213 arr[5] = (sdebug_store_sectors >> 16) & 0xff;
1214 arr[6] = (sdebug_store_sectors >> 8) & 0xff;
1215 arr[7] = sdebug_store_sectors & 0xff;
1216 }
1217
1218 /* Optimal Transfer Length */
1219 put_unaligned_be32(scsi_debug_opt_blks, &arr[8]);
1220
1221 if (scsi_debug_lbpu) {
1222 /* Maximum Unmap LBA Count */
1223 put_unaligned_be32(scsi_debug_unmap_max_blocks, &arr[16]);
1224
1225 /* Maximum Unmap Block Descriptor Count */
1226 put_unaligned_be32(scsi_debug_unmap_max_desc, &arr[20]);
1227 }
1228
1229 /* Unmap Granularity Alignment */
1230 if (scsi_debug_unmap_alignment) {
1231 put_unaligned_be32(scsi_debug_unmap_alignment, &arr[28]);
1232 arr[28] |= 0x80; /* UGAVALID */
1233 }
1234
1235 /* Optimal Unmap Granularity */
1236 put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]);
1237
1238 /* Maximum WRITE SAME Length */
1239 put_unaligned_be64(scsi_debug_write_same_length, &arr[32]);
1240
1241 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
1242
1243 return sizeof(vpdb0_data);
1244}
1245
1246/* Block device characteristics VPD page (SBC-3) */
1247static int inquiry_evpd_b1(unsigned char *arr)
1248{
1249 memset(arr, 0, 0x3c);
1250 arr[0] = 0;
1251 arr[1] = 1; /* non rotating medium (e.g. solid state) */
1252 arr[2] = 0;
1253 arr[3] = 5; /* less than 1.8" */
1254
1255 return 0x3c;
1256}
1257
1258/* Logical block provisioning VPD page (SBC-3) */
1259static int inquiry_evpd_b2(unsigned char *arr)
1260{
1261 memset(arr, 0, 0x4);
1262 arr[0] = 0; /* threshold exponent */
1263
1264 if (scsi_debug_lbpu)
1265 arr[1] = 1 << 7;
1266
1267 if (scsi_debug_lbpws)
1268 arr[1] |= 1 << 6;
1269
1270 if (scsi_debug_lbpws10)
1271 arr[1] |= 1 << 5;
1272
1273 if (scsi_debug_lbprz)
1274 arr[1] |= 1 << 2;
1275
1276 return 0x4;
1277}
1278
1279#define SDEBUG_LONG_INQ_SZ 96
1280#define SDEBUG_MAX_INQ_ARR_SZ 584
1281
1282static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1283{
1284 unsigned char pq_pdt;
1285 unsigned char * arr;
1286 unsigned char *cmd = scp->cmnd;
1287 int alloc_len, n, ret;
1288 bool have_wlun;
1289
1290 alloc_len = (cmd[3] << 8) + cmd[4];
1291 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
1292 if (! arr)
1293 return DID_REQUEUE << 16;
1294 have_wlun = (scp->device->lun == SCSI_W_LUN_REPORT_LUNS);
1295 if (have_wlun)
1296 pq_pdt = 0x1e; /* present, wlun */
1297 else if (scsi_debug_no_lun_0 && (0 == devip->lun))
1298 pq_pdt = 0x7f; /* not present, no device type */
1299 else
1300 pq_pdt = (scsi_debug_ptype & 0x1f);
1301 arr[0] = pq_pdt;
1302 if (0x2 & cmd[1]) { /* CMDDT bit set */
1303 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
1304 kfree(arr);
1305 return check_condition_result;
1306 } else if (0x1 & cmd[1]) { /* EVPD bit set */
1307 int lu_id_num, port_group_id, target_dev_id, len;
1308 char lu_id_str[6];
1309 int host_no = devip->sdbg_host->shost->host_no;
1310
1311 port_group_id = (((host_no + 1) & 0x7f) << 8) +
1312 (devip->channel & 0x7f);
1313 if (0 == scsi_debug_vpd_use_hostno)
1314 host_no = 0;
1315 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) +
1316 (devip->target * 1000) + devip->lun);
1317 target_dev_id = ((host_no + 1) * 2000) +
1318 (devip->target * 1000) - 3;
1319 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
1320 if (0 == cmd[2]) { /* supported vital product data pages */
1321 arr[1] = cmd[2]; /*sanity */
1322 n = 4;
1323 arr[n++] = 0x0; /* this page */
1324 arr[n++] = 0x80; /* unit serial number */
1325 arr[n++] = 0x83; /* device identification */
1326 arr[n++] = 0x84; /* software interface ident. */
1327 arr[n++] = 0x85; /* management network addresses */
1328 arr[n++] = 0x86; /* extended inquiry */
1329 arr[n++] = 0x87; /* mode page policy */
1330 arr[n++] = 0x88; /* SCSI ports */
1331 arr[n++] = 0x89; /* ATA information */
1332 arr[n++] = 0xb0; /* Block limits (SBC) */
1333 arr[n++] = 0xb1; /* Block characteristics (SBC) */
1334 if (scsi_debug_lbp()) /* Logical Block Prov. (SBC) */
1335 arr[n++] = 0xb2;
1336 arr[3] = n - 4; /* number of supported VPD pages */
1337 } else if (0x80 == cmd[2]) { /* unit serial number */
1338 arr[1] = cmd[2]; /*sanity */
1339 arr[3] = len;
1340 memcpy(&arr[4], lu_id_str, len);
1341 } else if (0x83 == cmd[2]) { /* device identification */
1342 arr[1] = cmd[2]; /*sanity */
1343 arr[3] = inquiry_evpd_83(&arr[4], port_group_id,
1344 target_dev_id, lu_id_num,
1345 lu_id_str, len);
1346 } else if (0x84 == cmd[2]) { /* Software interface ident. */
1347 arr[1] = cmd[2]; /*sanity */
1348 arr[3] = inquiry_evpd_84(&arr[4]);
1349 } else if (0x85 == cmd[2]) { /* Management network addresses */
1350 arr[1] = cmd[2]; /*sanity */
1351 arr[3] = inquiry_evpd_85(&arr[4]);
1352 } else if (0x86 == cmd[2]) { /* extended inquiry */
1353 arr[1] = cmd[2]; /*sanity */
1354 arr[3] = 0x3c; /* number of following entries */
1355 if (scsi_debug_dif == SD_DIF_TYPE3_PROTECTION)
1356 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
1357 else if (scsi_debug_dif)
1358 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
1359 else
1360 arr[4] = 0x0; /* no protection stuff */
1361 arr[5] = 0x7; /* head of q, ordered + simple q's */
1362 } else if (0x87 == cmd[2]) { /* mode page policy */
1363 arr[1] = cmd[2]; /*sanity */
1364 arr[3] = 0x8; /* number of following entries */
1365 arr[4] = 0x2; /* disconnect-reconnect mp */
1366 arr[6] = 0x80; /* mlus, shared */
1367 arr[8] = 0x18; /* protocol specific lu */
1368 arr[10] = 0x82; /* mlus, per initiator port */
1369 } else if (0x88 == cmd[2]) { /* SCSI Ports */
1370 arr[1] = cmd[2]; /*sanity */
1371 arr[3] = inquiry_evpd_88(&arr[4], target_dev_id);
1372 } else if (0x89 == cmd[2]) { /* ATA information */
1373 arr[1] = cmd[2]; /*sanity */
1374 n = inquiry_evpd_89(&arr[4]);
1375 arr[2] = (n >> 8);
1376 arr[3] = (n & 0xff);
1377 } else if (0xb0 == cmd[2]) { /* Block limits (SBC) */
1378 arr[1] = cmd[2]; /*sanity */
1379 arr[3] = inquiry_evpd_b0(&arr[4]);
1380 } else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */
1381 arr[1] = cmd[2]; /*sanity */
1382 arr[3] = inquiry_evpd_b1(&arr[4]);
1383 } else if (0xb2 == cmd[2]) { /* Logical Block Prov. (SBC) */
1384 arr[1] = cmd[2]; /*sanity */
1385 arr[3] = inquiry_evpd_b2(&arr[4]);
1386 } else {
1387 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
1388 kfree(arr);
1389 return check_condition_result;
1390 }
1391 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
1392 ret = fill_from_dev_buffer(scp, arr,
1393 min(len, SDEBUG_MAX_INQ_ARR_SZ));
1394 kfree(arr);
1395 return ret;
1396 }
1397 /* drops through here for a standard inquiry */
1398 arr[1] = scsi_debug_removable ? 0x80 : 0; /* Removable disk */
1399 arr[2] = scsi_debug_scsi_level;
1400 arr[3] = 2; /* response_data_format==2 */
1401 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
1402 arr[5] = scsi_debug_dif ? 1 : 0; /* PROTECT bit */
1403 if (0 == scsi_debug_vpd_use_hostno)
1404 arr[5] = 0x10; /* claim: implicit TGPS */
1405 arr[6] = 0x10; /* claim: MultiP */
1406 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
1407 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
1408 memcpy(&arr[8], inq_vendor_id, 8);
1409 memcpy(&arr[16], inq_product_id, 16);
1410 memcpy(&arr[32], inq_product_rev, 4);
1411 /* version descriptors (2 bytes each) follow */
1412 arr[58] = 0x0; arr[59] = 0xa2; /* SAM-5 rev 4 */
1413 arr[60] = 0x4; arr[61] = 0x68; /* SPC-4 rev 37 */
1414 n = 62;
1415 if (scsi_debug_ptype == 0) {
1416 arr[n++] = 0x4; arr[n++] = 0xc5; /* SBC-4 rev 36 */
1417 } else if (scsi_debug_ptype == 1) {
1418 arr[n++] = 0x5; arr[n++] = 0x25; /* SSC-4 rev 3 */
1419 }
1420 arr[n++] = 0x20; arr[n++] = 0xe6; /* SPL-3 rev 7 */
1421 ret = fill_from_dev_buffer(scp, arr,
1422 min(alloc_len, SDEBUG_LONG_INQ_SZ));
1423 kfree(arr);
1424 return ret;
1425}
1426
1427static int resp_requests(struct scsi_cmnd * scp,
1428 struct sdebug_dev_info * devip)
1429{
1430 unsigned char * sbuff;
1431 unsigned char *cmd = scp->cmnd;
1432 unsigned char arr[SCSI_SENSE_BUFFERSIZE];
1433 bool dsense;
1434 int len = 18;
1435
1436 memset(arr, 0, sizeof(arr));
1437 dsense = !!(cmd[1] & 1);
1438 sbuff = scp->sense_buffer;
1439 if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
1440 if (dsense) {
1441 arr[0] = 0x72;
1442 arr[1] = 0x0; /* NO_SENSE in sense_key */
1443 arr[2] = THRESHOLD_EXCEEDED;
1444 arr[3] = 0xff; /* TEST set and MRIE==6 */
1445 len = 8;
1446 } else {
1447 arr[0] = 0x70;
1448 arr[2] = 0x0; /* NO_SENSE in sense_key */
1449 arr[7] = 0xa; /* 18 byte sense buffer */
1450 arr[12] = THRESHOLD_EXCEEDED;
1451 arr[13] = 0xff; /* TEST set and MRIE==6 */
1452 }
1453 } else {
1454 memcpy(arr, sbuff, SCSI_SENSE_BUFFERSIZE);
1455 if (arr[0] >= 0x70 && dsense == scsi_debug_dsense)
1456 ; /* have sense and formats match */
1457 else if (arr[0] <= 0x70) {
1458 if (dsense) {
1459 memset(arr, 0, 8);
1460 arr[0] = 0x72;
1461 len = 8;
1462 } else {
1463 memset(arr, 0, 18);
1464 arr[0] = 0x70;
1465 arr[7] = 0xa;
1466 }
1467 } else if (dsense) {
1468 memset(arr, 0, 8);
1469 arr[0] = 0x72;
1470 arr[1] = sbuff[2]; /* sense key */
1471 arr[2] = sbuff[12]; /* asc */
1472 arr[3] = sbuff[13]; /* ascq */
1473 len = 8;
1474 } else {
1475 memset(arr, 0, 18);
1476 arr[0] = 0x70;
1477 arr[2] = sbuff[1];
1478 arr[7] = 0xa;
1479 arr[12] = sbuff[1];
1480 arr[13] = sbuff[3];
1481 }
1482
1483 }
1484 mk_sense_buffer(scp, 0, NO_ADDITIONAL_SENSE, 0);
1485 return fill_from_dev_buffer(scp, arr, len);
1486}
1487
1488static int resp_start_stop(struct scsi_cmnd * scp,
1489 struct sdebug_dev_info * devip)
1490{
1491 unsigned char *cmd = scp->cmnd;
1492 int power_cond, start;
1493
1494 power_cond = (cmd[4] & 0xf0) >> 4;
1495 if (power_cond) {
1496 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
1497 return check_condition_result;
1498 }
1499 start = cmd[4] & 1;
1500 if (start == devip->stopped)
1501 devip->stopped = !start;
1502 return 0;
1503}
1504
1505static sector_t get_sdebug_capacity(void)
1506{
1507 if (scsi_debug_virtual_gb > 0)
1508 return (sector_t)scsi_debug_virtual_gb *
1509 (1073741824 / scsi_debug_sector_size);
1510 else
1511 return sdebug_store_sectors;
1512}
1513
1514#define SDEBUG_READCAP_ARR_SZ 8
1515static int resp_readcap(struct scsi_cmnd * scp,
1516 struct sdebug_dev_info * devip)
1517{
1518 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
1519 unsigned int capac;
1520
1521 /* following just in case virtual_gb changed */
1522 sdebug_capacity = get_sdebug_capacity();
1523 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
1524 if (sdebug_capacity < 0xffffffff) {
1525 capac = (unsigned int)sdebug_capacity - 1;
1526 arr[0] = (capac >> 24);
1527 arr[1] = (capac >> 16) & 0xff;
1528 arr[2] = (capac >> 8) & 0xff;
1529 arr[3] = capac & 0xff;
1530 } else {
1531 arr[0] = 0xff;
1532 arr[1] = 0xff;
1533 arr[2] = 0xff;
1534 arr[3] = 0xff;
1535 }
1536 arr[6] = (scsi_debug_sector_size >> 8) & 0xff;
1537 arr[7] = scsi_debug_sector_size & 0xff;
1538 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1539}
1540
1541#define SDEBUG_READCAP16_ARR_SZ 32
1542static int resp_readcap16(struct scsi_cmnd * scp,
1543 struct sdebug_dev_info * devip)
1544{
1545 unsigned char *cmd = scp->cmnd;
1546 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
1547 unsigned long long capac;
1548 int k, alloc_len;
1549
1550 alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8)
1551 + cmd[13]);
1552 /* following just in case virtual_gb changed */
1553 sdebug_capacity = get_sdebug_capacity();
1554 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
1555 capac = sdebug_capacity - 1;
1556 for (k = 0; k < 8; ++k, capac >>= 8)
1557 arr[7 - k] = capac & 0xff;
1558 arr[8] = (scsi_debug_sector_size >> 24) & 0xff;
1559 arr[9] = (scsi_debug_sector_size >> 16) & 0xff;
1560 arr[10] = (scsi_debug_sector_size >> 8) & 0xff;
1561 arr[11] = scsi_debug_sector_size & 0xff;
1562 arr[13] = scsi_debug_physblk_exp & 0xf;
1563 arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f;
1564
1565 if (scsi_debug_lbp()) {
1566 arr[14] |= 0x80; /* LBPME */
1567 if (scsi_debug_lbprz)
1568 arr[14] |= 0x40; /* LBPRZ */
1569 }
1570
1571 arr[15] = scsi_debug_lowest_aligned & 0xff;
1572
1573 if (scsi_debug_dif) {
1574 arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */
1575 arr[12] |= 1; /* PROT_EN */
1576 }
1577
1578 return fill_from_dev_buffer(scp, arr,
1579 min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
1580}
1581
1582#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1583
1584static int resp_report_tgtpgs(struct scsi_cmnd * scp,
1585 struct sdebug_dev_info * devip)
1586{
1587 unsigned char *cmd = scp->cmnd;
1588 unsigned char * arr;
1589 int host_no = devip->sdbg_host->shost->host_no;
1590 int n, ret, alen, rlen;
1591 int port_group_a, port_group_b, port_a, port_b;
1592
1593 alen = ((cmd[6] << 24) + (cmd[7] << 16) + (cmd[8] << 8)
1594 + cmd[9]);
1595
1596 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1597 if (! arr)
1598 return DID_REQUEUE << 16;
1599 /*
1600 * EVPD page 0x88 states we have two ports, one
1601 * real and a fake port with no device connected.
1602 * So we create two port groups with one port each
1603 * and set the group with port B to unavailable.
1604 */
1605 port_a = 0x1; /* relative port A */
1606 port_b = 0x2; /* relative port B */
1607 port_group_a = (((host_no + 1) & 0x7f) << 8) +
1608 (devip->channel & 0x7f);
1609 port_group_b = (((host_no + 1) & 0x7f) << 8) +
1610 (devip->channel & 0x7f) + 0x80;
1611
1612 /*
1613 * The asymmetric access state is cycled according to the host_id.
1614 */
1615 n = 4;
1616 if (0 == scsi_debug_vpd_use_hostno) {
1617 arr[n++] = host_no % 3; /* Asymm access state */
1618 arr[n++] = 0x0F; /* claim: all states are supported */
1619 } else {
1620 arr[n++] = 0x0; /* Active/Optimized path */
1621 arr[n++] = 0x01; /* claim: only support active/optimized paths */
1622 }
1623 arr[n++] = (port_group_a >> 8) & 0xff;
1624 arr[n++] = port_group_a & 0xff;
1625 arr[n++] = 0; /* Reserved */
1626 arr[n++] = 0; /* Status code */
1627 arr[n++] = 0; /* Vendor unique */
1628 arr[n++] = 0x1; /* One port per group */
1629 arr[n++] = 0; /* Reserved */
1630 arr[n++] = 0; /* Reserved */
1631 arr[n++] = (port_a >> 8) & 0xff;
1632 arr[n++] = port_a & 0xff;
1633 arr[n++] = 3; /* Port unavailable */
1634 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
1635 arr[n++] = (port_group_b >> 8) & 0xff;
1636 arr[n++] = port_group_b & 0xff;
1637 arr[n++] = 0; /* Reserved */
1638 arr[n++] = 0; /* Status code */
1639 arr[n++] = 0; /* Vendor unique */
1640 arr[n++] = 0x1; /* One port per group */
1641 arr[n++] = 0; /* Reserved */
1642 arr[n++] = 0; /* Reserved */
1643 arr[n++] = (port_b >> 8) & 0xff;
1644 arr[n++] = port_b & 0xff;
1645
1646 rlen = n - 4;
1647 arr[0] = (rlen >> 24) & 0xff;
1648 arr[1] = (rlen >> 16) & 0xff;
1649 arr[2] = (rlen >> 8) & 0xff;
1650 arr[3] = rlen & 0xff;
1651
1652 /*
1653 * Return the smallest value of either
1654 * - The allocated length
1655 * - The constructed command length
1656 * - The maximum array size
1657 */
1658 rlen = min(alen,n);
1659 ret = fill_from_dev_buffer(scp, arr,
1660 min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1661 kfree(arr);
1662 return ret;
1663}
1664
1665static int
1666resp_rsup_opcodes(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1667{
1668 bool rctd;
1669 u8 reporting_opts, req_opcode, sdeb_i, supp;
1670 u16 req_sa, u;
1671 u32 alloc_len, a_len;
1672 int k, offset, len, errsts, count, bump, na;
1673 const struct opcode_info_t *oip;
1674 const struct opcode_info_t *r_oip;
1675 u8 *arr;
1676 u8 *cmd = scp->cmnd;
1677
1678 rctd = !!(cmd[2] & 0x80);
1679 reporting_opts = cmd[2] & 0x7;
1680 req_opcode = cmd[3];
1681 req_sa = get_unaligned_be16(cmd + 4);
1682 alloc_len = get_unaligned_be32(cmd + 6);
1683 if (alloc_len < 4 || alloc_len > 0xffff) {
1684 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1685 return check_condition_result;
1686 }
1687 if (alloc_len > 8192)
1688 a_len = 8192;
1689 else
1690 a_len = alloc_len;
1691 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC);
1692 if (NULL == arr) {
1693 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
1694 INSUFF_RES_ASCQ);
1695 return check_condition_result;
1696 }
1697 switch (reporting_opts) {
1698 case 0: /* all commands */
1699 /* count number of commands */
1700 for (count = 0, oip = opcode_info_arr;
1701 oip->num_attached != 0xff; ++oip) {
1702 if (F_INV_OP & oip->flags)
1703 continue;
1704 count += (oip->num_attached + 1);
1705 }
1706 bump = rctd ? 20 : 8;
1707 put_unaligned_be32(count * bump, arr);
1708 for (offset = 4, oip = opcode_info_arr;
1709 oip->num_attached != 0xff && offset < a_len; ++oip) {
1710 if (F_INV_OP & oip->flags)
1711 continue;
1712 na = oip->num_attached;
1713 arr[offset] = oip->opcode;
1714 put_unaligned_be16(oip->sa, arr + offset + 2);
1715 if (rctd)
1716 arr[offset + 5] |= 0x2;
1717 if (FF_SA & oip->flags)
1718 arr[offset + 5] |= 0x1;
1719 put_unaligned_be16(oip->len_mask[0], arr + offset + 6);
1720 if (rctd)
1721 put_unaligned_be16(0xa, arr + offset + 8);
1722 r_oip = oip;
1723 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) {
1724 if (F_INV_OP & oip->flags)
1725 continue;
1726 offset += bump;
1727 arr[offset] = oip->opcode;
1728 put_unaligned_be16(oip->sa, arr + offset + 2);
1729 if (rctd)
1730 arr[offset + 5] |= 0x2;
1731 if (FF_SA & oip->flags)
1732 arr[offset + 5] |= 0x1;
1733 put_unaligned_be16(oip->len_mask[0],
1734 arr + offset + 6);
1735 if (rctd)
1736 put_unaligned_be16(0xa,
1737 arr + offset + 8);
1738 }
1739 oip = r_oip;
1740 offset += bump;
1741 }
1742 break;
1743 case 1: /* one command: opcode only */
1744 case 2: /* one command: opcode plus service action */
1745 case 3: /* one command: if sa==0 then opcode only else opcode+sa */
1746 sdeb_i = opcode_ind_arr[req_opcode];
1747 oip = &opcode_info_arr[sdeb_i];
1748 if (F_INV_OP & oip->flags) {
1749 supp = 1;
1750 offset = 4;
1751 } else {
1752 if (1 == reporting_opts) {
1753 if (FF_SA & oip->flags) {
1754 mk_sense_invalid_fld(scp, SDEB_IN_CDB,
1755 2, 2);
1756 kfree(arr);
1757 return check_condition_result;
1758 }
1759 req_sa = 0;
1760 } else if (2 == reporting_opts &&
1761 0 == (FF_SA & oip->flags)) {
1762 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
1763 kfree(arr); /* point at requested sa */
1764 return check_condition_result;
1765 }
1766 if (0 == (FF_SA & oip->flags) &&
1767 req_opcode == oip->opcode)
1768 supp = 3;
1769 else if (0 == (FF_SA & oip->flags)) {
1770 na = oip->num_attached;
1771 for (k = 0, oip = oip->arrp; k < na;
1772 ++k, ++oip) {
1773 if (req_opcode == oip->opcode)
1774 break;
1775 }
1776 supp = (k >= na) ? 1 : 3;
1777 } else if (req_sa != oip->sa) {
1778 na = oip->num_attached;
1779 for (k = 0, oip = oip->arrp; k < na;
1780 ++k, ++oip) {
1781 if (req_sa == oip->sa)
1782 break;
1783 }
1784 supp = (k >= na) ? 1 : 3;
1785 } else
1786 supp = 3;
1787 if (3 == supp) {
1788 u = oip->len_mask[0];
1789 put_unaligned_be16(u, arr + 2);
1790 arr[4] = oip->opcode;
1791 for (k = 1; k < u; ++k)
1792 arr[4 + k] = (k < 16) ?
1793 oip->len_mask[k] : 0xff;
1794 offset = 4 + u;
1795 } else
1796 offset = 4;
1797 }
1798 arr[1] = (rctd ? 0x80 : 0) | supp;
1799 if (rctd) {
1800 put_unaligned_be16(0xa, arr + offset);
1801 offset += 12;
1802 }
1803 break;
1804 default:
1805 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
1806 kfree(arr);
1807 return check_condition_result;
1808 }
1809 offset = (offset < a_len) ? offset : a_len;
1810 len = (offset < alloc_len) ? offset : alloc_len;
1811 errsts = fill_from_dev_buffer(scp, arr, len);
1812 kfree(arr);
1813 return errsts;
1814}
1815
1816static int
1817resp_rsup_tmfs(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1818{
1819 bool repd;
1820 u32 alloc_len, len;
1821 u8 arr[16];
1822 u8 *cmd = scp->cmnd;
1823
1824 memset(arr, 0, sizeof(arr));
1825 repd = !!(cmd[2] & 0x80);
1826 alloc_len = get_unaligned_be32(cmd + 6);
1827 if (alloc_len < 4) {
1828 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1829 return check_condition_result;
1830 }
1831 arr[0] = 0xc8; /* ATS | ATSS | LURS */
1832 arr[1] = 0x1; /* ITNRS */
1833 if (repd) {
1834 arr[3] = 0xc;
1835 len = 16;
1836 } else
1837 len = 4;
1838
1839 len = (len < alloc_len) ? len : alloc_len;
1840 return fill_from_dev_buffer(scp, arr, len);
1841}
1842
1843/* <<Following mode page info copied from ST318451LW>> */
1844
1845static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target)
1846{ /* Read-Write Error Recovery page for mode_sense */
1847 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
1848 5, 0, 0xff, 0xff};
1849
1850 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
1851 if (1 == pcontrol)
1852 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
1853 return sizeof(err_recov_pg);
1854}
1855
1856static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target)
1857{ /* Disconnect-Reconnect page for mode_sense */
1858 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
1859 0, 0, 0, 0, 0, 0, 0, 0};
1860
1861 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
1862 if (1 == pcontrol)
1863 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
1864 return sizeof(disconnect_pg);
1865}
1866
1867static int resp_format_pg(unsigned char * p, int pcontrol, int target)
1868{ /* Format device page for mode_sense */
1869 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
1870 0, 0, 0, 0, 0, 0, 0, 0,
1871 0, 0, 0, 0, 0x40, 0, 0, 0};
1872
1873 memcpy(p, format_pg, sizeof(format_pg));
1874 p[10] = (sdebug_sectors_per >> 8) & 0xff;
1875 p[11] = sdebug_sectors_per & 0xff;
1876 p[12] = (scsi_debug_sector_size >> 8) & 0xff;
1877 p[13] = scsi_debug_sector_size & 0xff;
1878 if (scsi_debug_removable)
1879 p[20] |= 0x20; /* should agree with INQUIRY */
1880 if (1 == pcontrol)
1881 memset(p + 2, 0, sizeof(format_pg) - 2);
1882 return sizeof(format_pg);
1883}
1884
1885static int resp_caching_pg(unsigned char * p, int pcontrol, int target)
1886{ /* Caching page for mode_sense */
1887 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
1888 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
1889 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
1890 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
1891
1892 if (SCSI_DEBUG_OPT_N_WCE & scsi_debug_opts)
1893 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
1894 memcpy(p, caching_pg, sizeof(caching_pg));
1895 if (1 == pcontrol)
1896 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
1897 else if (2 == pcontrol)
1898 memcpy(p, d_caching_pg, sizeof(d_caching_pg));
1899 return sizeof(caching_pg);
1900}
1901
1902static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
1903{ /* Control mode page for mode_sense */
1904 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
1905 0, 0, 0, 0};
1906 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
1907 0, 0, 0x2, 0x4b};
1908
1909 if (scsi_debug_dsense)
1910 ctrl_m_pg[2] |= 0x4;
1911 else
1912 ctrl_m_pg[2] &= ~0x4;
1913
1914 if (scsi_debug_ato)
1915 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
1916
1917 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
1918 if (1 == pcontrol)
1919 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
1920 else if (2 == pcontrol)
1921 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
1922 return sizeof(ctrl_m_pg);
1923}
1924
1925
1926static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target)
1927{ /* Informational Exceptions control mode page for mode_sense */
1928 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
1929 0, 0, 0x0, 0x0};
1930 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1931 0, 0, 0x0, 0x0};
1932
1933 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
1934 if (1 == pcontrol)
1935 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
1936 else if (2 == pcontrol)
1937 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
1938 return sizeof(iec_m_pg);
1939}
1940
1941static int resp_sas_sf_m_pg(unsigned char * p, int pcontrol, int target)
1942{ /* SAS SSP mode page - short format for mode_sense */
1943 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
1944 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
1945
1946 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
1947 if (1 == pcontrol)
1948 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
1949 return sizeof(sas_sf_m_pg);
1950}
1951
1952
1953static int resp_sas_pcd_m_spg(unsigned char * p, int pcontrol, int target,
1954 int target_dev_id)
1955{ /* SAS phy control and discover mode page for mode_sense */
1956 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
1957 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
1958 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1959 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1960 0x2, 0, 0, 0, 0, 0, 0, 0,
1961 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1962 0, 0, 0, 0, 0, 0, 0, 0,
1963 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
1964 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1965 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1966 0x3, 0, 0, 0, 0, 0, 0, 0,
1967 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1968 0, 0, 0, 0, 0, 0, 0, 0,
1969 };
1970 int port_a, port_b;
1971
1972 port_a = target_dev_id + 1;
1973 port_b = port_a + 1;
1974 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
1975 p[20] = (port_a >> 24);
1976 p[21] = (port_a >> 16) & 0xff;
1977 p[22] = (port_a >> 8) & 0xff;
1978 p[23] = port_a & 0xff;
1979 p[48 + 20] = (port_b >> 24);
1980 p[48 + 21] = (port_b >> 16) & 0xff;
1981 p[48 + 22] = (port_b >> 8) & 0xff;
1982 p[48 + 23] = port_b & 0xff;
1983 if (1 == pcontrol)
1984 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
1985 return sizeof(sas_pcd_m_pg);
1986}
1987
1988static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol)
1989{ /* SAS SSP shared protocol specific port mode subpage */
1990 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
1991 0, 0, 0, 0, 0, 0, 0, 0,
1992 };
1993
1994 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
1995 if (1 == pcontrol)
1996 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
1997 return sizeof(sas_sha_m_pg);
1998}
1999
2000#define SDEBUG_MAX_MSENSE_SZ 256
2001
2002static int
2003resp_mode_sense(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2004{
2005 unsigned char dbd, llbaa;
2006 int pcontrol, pcode, subpcode, bd_len;
2007 unsigned char dev_spec;
2008 int k, alloc_len, msense_6, offset, len, target_dev_id;
2009 int target = scp->device->id;
2010 unsigned char * ap;
2011 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
2012 unsigned char *cmd = scp->cmnd;
2013
2014 dbd = !!(cmd[1] & 0x8);
2015 pcontrol = (cmd[2] & 0xc0) >> 6;
2016 pcode = cmd[2] & 0x3f;
2017 subpcode = cmd[3];
2018 msense_6 = (MODE_SENSE == cmd[0]);
2019 llbaa = msense_6 ? 0 : !!(cmd[1] & 0x10);
2020 if ((0 == scsi_debug_ptype) && (0 == dbd))
2021 bd_len = llbaa ? 16 : 8;
2022 else
2023 bd_len = 0;
2024 alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]);
2025 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
2026 if (0x3 == pcontrol) { /* Saving values not supported */
2027 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
2028 return check_condition_result;
2029 }
2030 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
2031 (devip->target * 1000) - 3;
2032 /* set DPOFUA bit for disks */
2033 if (0 == scsi_debug_ptype)
2034 dev_spec = (DEV_READONLY(target) ? 0x80 : 0x0) | 0x10;
2035 else
2036 dev_spec = 0x0;
2037 if (msense_6) {
2038 arr[2] = dev_spec;
2039 arr[3] = bd_len;
2040 offset = 4;
2041 } else {
2042 arr[3] = dev_spec;
2043 if (16 == bd_len)
2044 arr[4] = 0x1; /* set LONGLBA bit */
2045 arr[7] = bd_len; /* assume 255 or less */
2046 offset = 8;
2047 }
2048 ap = arr + offset;
2049 if ((bd_len > 0) && (!sdebug_capacity))
2050 sdebug_capacity = get_sdebug_capacity();
2051
2052 if (8 == bd_len) {
2053 if (sdebug_capacity > 0xfffffffe) {
2054 ap[0] = 0xff;
2055 ap[1] = 0xff;
2056 ap[2] = 0xff;
2057 ap[3] = 0xff;
2058 } else {
2059 ap[0] = (sdebug_capacity >> 24) & 0xff;
2060 ap[1] = (sdebug_capacity >> 16) & 0xff;
2061 ap[2] = (sdebug_capacity >> 8) & 0xff;
2062 ap[3] = sdebug_capacity & 0xff;
2063 }
2064 ap[6] = (scsi_debug_sector_size >> 8) & 0xff;
2065 ap[7] = scsi_debug_sector_size & 0xff;
2066 offset += bd_len;
2067 ap = arr + offset;
2068 } else if (16 == bd_len) {
2069 unsigned long long capac = sdebug_capacity;
2070
2071 for (k = 0; k < 8; ++k, capac >>= 8)
2072 ap[7 - k] = capac & 0xff;
2073 ap[12] = (scsi_debug_sector_size >> 24) & 0xff;
2074 ap[13] = (scsi_debug_sector_size >> 16) & 0xff;
2075 ap[14] = (scsi_debug_sector_size >> 8) & 0xff;
2076 ap[15] = scsi_debug_sector_size & 0xff;
2077 offset += bd_len;
2078 ap = arr + offset;
2079 }
2080
2081 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
2082 /* TODO: Control Extension page */
2083 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2084 return check_condition_result;
2085 }
2086 switch (pcode) {
2087 case 0x1: /* Read-Write error recovery page, direct access */
2088 len = resp_err_recov_pg(ap, pcontrol, target);
2089 offset += len;
2090 break;
2091 case 0x2: /* Disconnect-Reconnect page, all devices */
2092 len = resp_disconnect_pg(ap, pcontrol, target);
2093 offset += len;
2094 break;
2095 case 0x3: /* Format device page, direct access */
2096 len = resp_format_pg(ap, pcontrol, target);
2097 offset += len;
2098 break;
2099 case 0x8: /* Caching page, direct access */
2100 len = resp_caching_pg(ap, pcontrol, target);
2101 offset += len;
2102 break;
2103 case 0xa: /* Control Mode page, all devices */
2104 len = resp_ctrl_m_pg(ap, pcontrol, target);
2105 offset += len;
2106 break;
2107 case 0x19: /* if spc==1 then sas phy, control+discover */
2108 if ((subpcode > 0x2) && (subpcode < 0xff)) {
2109 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2110 return check_condition_result;
2111 }
2112 len = 0;
2113 if ((0x0 == subpcode) || (0xff == subpcode))
2114 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2115 if ((0x1 == subpcode) || (0xff == subpcode))
2116 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
2117 target_dev_id);
2118 if ((0x2 == subpcode) || (0xff == subpcode))
2119 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2120 offset += len;
2121 break;
2122 case 0x1c: /* Informational Exceptions Mode page, all devices */
2123 len = resp_iec_m_pg(ap, pcontrol, target);
2124 offset += len;
2125 break;
2126 case 0x3f: /* Read all Mode pages */
2127 if ((0 == subpcode) || (0xff == subpcode)) {
2128 len = resp_err_recov_pg(ap, pcontrol, target);
2129 len += resp_disconnect_pg(ap + len, pcontrol, target);
2130 len += resp_format_pg(ap + len, pcontrol, target);
2131 len += resp_caching_pg(ap + len, pcontrol, target);
2132 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
2133 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2134 if (0xff == subpcode) {
2135 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
2136 target, target_dev_id);
2137 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2138 }
2139 len += resp_iec_m_pg(ap + len, pcontrol, target);
2140 } else {
2141 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2142 return check_condition_result;
2143 }
2144 offset += len;
2145 break;
2146 default:
2147 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2148 return check_condition_result;
2149 }
2150 if (msense_6)
2151 arr[0] = offset - 1;
2152 else {
2153 arr[0] = ((offset - 2) >> 8) & 0xff;
2154 arr[1] = (offset - 2) & 0xff;
2155 }
2156 return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
2157}
2158
2159#define SDEBUG_MAX_MSELECT_SZ 512
2160
2161static int
2162resp_mode_select(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2163{
2164 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
2165 int param_len, res, mpage;
2166 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
2167 unsigned char *cmd = scp->cmnd;
2168 int mselect6 = (MODE_SELECT == cmd[0]);
2169
2170 memset(arr, 0, sizeof(arr));
2171 pf = cmd[1] & 0x10;
2172 sp = cmd[1] & 0x1;
2173 param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]);
2174 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
2175 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1);
2176 return check_condition_result;
2177 }
2178 res = fetch_to_dev_buffer(scp, arr, param_len);
2179 if (-1 == res)
2180 return (DID_ERROR << 16);
2181 else if ((res < param_len) &&
2182 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2183 sdev_printk(KERN_INFO, scp->device,
2184 "%s: cdb indicated=%d, IO sent=%d bytes\n",
2185 __func__, param_len, res);
2186 md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2);
2187 bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]);
2188 if (md_len > 2) {
2189 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1);
2190 return check_condition_result;
2191 }
2192 off = bd_len + (mselect6 ? 4 : 8);
2193 mpage = arr[off] & 0x3f;
2194 ps = !!(arr[off] & 0x80);
2195 if (ps) {
2196 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7);
2197 return check_condition_result;
2198 }
2199 spf = !!(arr[off] & 0x40);
2200 pg_len = spf ? ((arr[off + 2] << 8) + arr[off + 3] + 4) :
2201 (arr[off + 1] + 2);
2202 if ((pg_len + off) > param_len) {
2203 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2204 PARAMETER_LIST_LENGTH_ERR, 0);
2205 return check_condition_result;
2206 }
2207 switch (mpage) {
2208 case 0x8: /* Caching Mode page */
2209 if (caching_pg[1] == arr[off + 1]) {
2210 memcpy(caching_pg + 2, arr + off + 2,
2211 sizeof(caching_pg) - 2);
2212 goto set_mode_changed_ua;
2213 }
2214 break;
2215 case 0xa: /* Control Mode page */
2216 if (ctrl_m_pg[1] == arr[off + 1]) {
2217 memcpy(ctrl_m_pg + 2, arr + off + 2,
2218 sizeof(ctrl_m_pg) - 2);
2219 scsi_debug_dsense = !!(ctrl_m_pg[2] & 0x4);
2220 goto set_mode_changed_ua;
2221 }
2222 break;
2223 case 0x1c: /* Informational Exceptions Mode page */
2224 if (iec_m_pg[1] == arr[off + 1]) {
2225 memcpy(iec_m_pg + 2, arr + off + 2,
2226 sizeof(iec_m_pg) - 2);
2227 goto set_mode_changed_ua;
2228 }
2229 break;
2230 default:
2231 break;
2232 }
2233 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5);
2234 return check_condition_result;
2235set_mode_changed_ua:
2236 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
2237 return 0;
2238}
2239
2240static int resp_temp_l_pg(unsigned char * arr)
2241{
2242 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
2243 0x0, 0x1, 0x3, 0x2, 0x0, 65,
2244 };
2245
2246 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
2247 return sizeof(temp_l_pg);
2248}
2249
2250static int resp_ie_l_pg(unsigned char * arr)
2251{
2252 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
2253 };
2254
2255 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
2256 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
2257 arr[4] = THRESHOLD_EXCEEDED;
2258 arr[5] = 0xff;
2259 }
2260 return sizeof(ie_l_pg);
2261}
2262
2263#define SDEBUG_MAX_LSENSE_SZ 512
2264
2265static int resp_log_sense(struct scsi_cmnd * scp,
2266 struct sdebug_dev_info * devip)
2267{
2268 int ppc, sp, pcontrol, pcode, subpcode, alloc_len, len, n;
2269 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
2270 unsigned char *cmd = scp->cmnd;
2271
2272 memset(arr, 0, sizeof(arr));
2273 ppc = cmd[1] & 0x2;
2274 sp = cmd[1] & 0x1;
2275 if (ppc || sp) {
2276 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0);
2277 return check_condition_result;
2278 }
2279 pcontrol = (cmd[2] & 0xc0) >> 6;
2280 pcode = cmd[2] & 0x3f;
2281 subpcode = cmd[3] & 0xff;
2282 alloc_len = (cmd[7] << 8) + cmd[8];
2283 arr[0] = pcode;
2284 if (0 == subpcode) {
2285 switch (pcode) {
2286 case 0x0: /* Supported log pages log page */
2287 n = 4;
2288 arr[n++] = 0x0; /* this page */
2289 arr[n++] = 0xd; /* Temperature */
2290 arr[n++] = 0x2f; /* Informational exceptions */
2291 arr[3] = n - 4;
2292 break;
2293 case 0xd: /* Temperature log page */
2294 arr[3] = resp_temp_l_pg(arr + 4);
2295 break;
2296 case 0x2f: /* Informational exceptions log page */
2297 arr[3] = resp_ie_l_pg(arr + 4);
2298 break;
2299 default:
2300 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2301 return check_condition_result;
2302 }
2303 } else if (0xff == subpcode) {
2304 arr[0] |= 0x40;
2305 arr[1] = subpcode;
2306 switch (pcode) {
2307 case 0x0: /* Supported log pages and subpages log page */
2308 n = 4;
2309 arr[n++] = 0x0;
2310 arr[n++] = 0x0; /* 0,0 page */
2311 arr[n++] = 0x0;
2312 arr[n++] = 0xff; /* this page */
2313 arr[n++] = 0xd;
2314 arr[n++] = 0x0; /* Temperature */
2315 arr[n++] = 0x2f;
2316 arr[n++] = 0x0; /* Informational exceptions */
2317 arr[3] = n - 4;
2318 break;
2319 case 0xd: /* Temperature subpages */
2320 n = 4;
2321 arr[n++] = 0xd;
2322 arr[n++] = 0x0; /* Temperature */
2323 arr[3] = n - 4;
2324 break;
2325 case 0x2f: /* Informational exceptions subpages */
2326 n = 4;
2327 arr[n++] = 0x2f;
2328 arr[n++] = 0x0; /* Informational exceptions */
2329 arr[3] = n - 4;
2330 break;
2331 default:
2332 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2333 return check_condition_result;
2334 }
2335 } else {
2336 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2337 return check_condition_result;
2338 }
2339 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
2340 return fill_from_dev_buffer(scp, arr,
2341 min(len, SDEBUG_MAX_INQ_ARR_SZ));
2342}
2343
2344static int check_device_access_params(struct scsi_cmnd *scp,
2345 unsigned long long lba, unsigned int num)
2346{
2347 if (lba + num > sdebug_capacity) {
2348 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2349 return check_condition_result;
2350 }
2351 /* transfer length excessive (tie in to block limits VPD page) */
2352 if (num > sdebug_store_sectors) {
2353 /* needs work to find which cdb byte 'num' comes from */
2354 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2355 return check_condition_result;
2356 }
2357 return 0;
2358}
2359
2360/* Returns number of bytes copied or -1 if error. */
2361static int
2362do_device_access(struct scsi_cmnd *scmd, u64 lba, u32 num, bool do_write)
2363{
2364 int ret;
2365 u64 block, rest = 0;
2366 struct scsi_data_buffer *sdb;
2367 enum dma_data_direction dir;
2368
2369 if (do_write) {
2370 sdb = scsi_out(scmd);
2371 dir = DMA_TO_DEVICE;
2372 } else {
2373 sdb = scsi_in(scmd);
2374 dir = DMA_FROM_DEVICE;
2375 }
2376
2377 if (!sdb->length)
2378 return 0;
2379 if (!(scsi_bidi_cmnd(scmd) || scmd->sc_data_direction == dir))
2380 return -1;
2381
2382 block = do_div(lba, sdebug_store_sectors);
2383 if (block + num > sdebug_store_sectors)
2384 rest = block + num - sdebug_store_sectors;
2385
2386 ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
2387 fake_storep + (block * scsi_debug_sector_size),
2388 (num - rest) * scsi_debug_sector_size, 0, do_write);
2389 if (ret != (num - rest) * scsi_debug_sector_size)
2390 return ret;
2391
2392 if (rest) {
2393 ret += sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
2394 fake_storep, rest * scsi_debug_sector_size,
2395 (num - rest) * scsi_debug_sector_size, do_write);
2396 }
2397
2398 return ret;
2399}
2400
2401/* If fake_store(lba,num) compares equal to arr(num), then copy top half of
2402 * arr into fake_store(lba,num) and return true. If comparison fails then
2403 * return false. */
2404static bool
2405comp_write_worker(u64 lba, u32 num, const u8 *arr)
2406{
2407 bool res;
2408 u64 block, rest = 0;
2409 u32 store_blks = sdebug_store_sectors;
2410 u32 lb_size = scsi_debug_sector_size;
2411
2412 block = do_div(lba, store_blks);
2413 if (block + num > store_blks)
2414 rest = block + num - store_blks;
2415
2416 res = !memcmp(fake_storep + (block * lb_size), arr,
2417 (num - rest) * lb_size);
2418 if (!res)
2419 return res;
2420 if (rest)
2421 res = memcmp(fake_storep, arr + ((num - rest) * lb_size),
2422 rest * lb_size);
2423 if (!res)
2424 return res;
2425 arr += num * lb_size;
2426 memcpy(fake_storep + (block * lb_size), arr, (num - rest) * lb_size);
2427 if (rest)
2428 memcpy(fake_storep, arr + ((num - rest) * lb_size),
2429 rest * lb_size);
2430 return res;
2431}
2432
2433static __be16 dif_compute_csum(const void *buf, int len)
2434{
2435 __be16 csum;
2436
2437 if (scsi_debug_guard)
2438 csum = (__force __be16)ip_compute_csum(buf, len);
2439 else
2440 csum = cpu_to_be16(crc_t10dif(buf, len));
2441
2442 return csum;
2443}
2444
2445static int dif_verify(struct sd_dif_tuple *sdt, const void *data,
2446 sector_t sector, u32 ei_lba)
2447{
2448 __be16 csum = dif_compute_csum(data, scsi_debug_sector_size);
2449
2450 if (sdt->guard_tag != csum) {
2451 pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
2452 (unsigned long)sector,
2453 be16_to_cpu(sdt->guard_tag),
2454 be16_to_cpu(csum));
2455 return 0x01;
2456 }
2457 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION &&
2458 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
2459 pr_err("REF check failed on sector %lu\n",
2460 (unsigned long)sector);
2461 return 0x03;
2462 }
2463 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
2464 be32_to_cpu(sdt->ref_tag) != ei_lba) {
2465 pr_err("REF check failed on sector %lu\n",
2466 (unsigned long)sector);
2467 return 0x03;
2468 }
2469 return 0;
2470}
2471
2472static void dif_copy_prot(struct scsi_cmnd *SCpnt, sector_t sector,
2473 unsigned int sectors, bool read)
2474{
2475 size_t resid;
2476 void *paddr;
2477 const void *dif_store_end = dif_storep + sdebug_store_sectors;
2478 struct sg_mapping_iter miter;
2479
2480 /* Bytes of protection data to copy into sgl */
2481 resid = sectors * sizeof(*dif_storep);
2482
2483 sg_miter_start(&miter, scsi_prot_sglist(SCpnt),
2484 scsi_prot_sg_count(SCpnt), SG_MITER_ATOMIC |
2485 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
2486
2487 while (sg_miter_next(&miter) && resid > 0) {
2488 size_t len = min(miter.length, resid);
2489 void *start = dif_store(sector);
2490 size_t rest = 0;
2491
2492 if (dif_store_end < start + len)
2493 rest = start + len - dif_store_end;
2494
2495 paddr = miter.addr;
2496
2497 if (read)
2498 memcpy(paddr, start, len - rest);
2499 else
2500 memcpy(start, paddr, len - rest);
2501
2502 if (rest) {
2503 if (read)
2504 memcpy(paddr + len - rest, dif_storep, rest);
2505 else
2506 memcpy(dif_storep, paddr + len - rest, rest);
2507 }
2508
2509 sector += len / sizeof(*dif_storep);
2510 resid -= len;
2511 }
2512 sg_miter_stop(&miter);
2513}
2514
2515static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
2516 unsigned int sectors, u32 ei_lba)
2517{
2518 unsigned int i;
2519 struct sd_dif_tuple *sdt;
2520 sector_t sector;
2521
2522 for (i = 0; i < sectors; i++, ei_lba++) {
2523 int ret;
2524
2525 sector = start_sec + i;
2526 sdt = dif_store(sector);
2527
2528 if (sdt->app_tag == cpu_to_be16(0xffff))
2529 continue;
2530
2531 ret = dif_verify(sdt, fake_store(sector), sector, ei_lba);
2532 if (ret) {
2533 dif_errors++;
2534 return ret;
2535 }
2536 }
2537
2538 dif_copy_prot(SCpnt, start_sec, sectors, true);
2539 dix_reads++;
2540
2541 return 0;
2542}
2543
2544static int
2545resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2546{
2547 u8 *cmd = scp->cmnd;
2548 u64 lba;
2549 u32 num;
2550 u32 ei_lba;
2551 unsigned long iflags;
2552 int ret;
2553 bool check_prot;
2554
2555 switch (cmd[0]) {
2556 case READ_16:
2557 ei_lba = 0;
2558 lba = get_unaligned_be64(cmd + 2);
2559 num = get_unaligned_be32(cmd + 10);
2560 check_prot = true;
2561 break;
2562 case READ_10:
2563 ei_lba = 0;
2564 lba = get_unaligned_be32(cmd + 2);
2565 num = get_unaligned_be16(cmd + 7);
2566 check_prot = true;
2567 break;
2568 case READ_6:
2569 ei_lba = 0;
2570 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
2571 (u32)(cmd[1] & 0x1f) << 16;
2572 num = (0 == cmd[4]) ? 256 : cmd[4];
2573 check_prot = true;
2574 break;
2575 case READ_12:
2576 ei_lba = 0;
2577 lba = get_unaligned_be32(cmd + 2);
2578 num = get_unaligned_be32(cmd + 6);
2579 check_prot = true;
2580 break;
2581 case XDWRITEREAD_10:
2582 ei_lba = 0;
2583 lba = get_unaligned_be32(cmd + 2);
2584 num = get_unaligned_be16(cmd + 7);
2585 check_prot = false;
2586 break;
2587 default: /* assume READ(32) */
2588 lba = get_unaligned_be64(cmd + 12);
2589 ei_lba = get_unaligned_be32(cmd + 20);
2590 num = get_unaligned_be32(cmd + 28);
2591 check_prot = false;
2592 break;
2593 }
2594 if (check_prot) {
2595 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
2596 (cmd[1] & 0xe0)) {
2597 mk_sense_invalid_opcode(scp);
2598 return check_condition_result;
2599 }
2600 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
2601 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
2602 (cmd[1] & 0xe0) == 0)
2603 sdev_printk(KERN_ERR, scp->device, "Unprotected RD "
2604 "to DIF device\n");
2605 }
2606 if (sdebug_any_injecting_opt) {
2607 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
2608
2609 if (ep->inj_short)
2610 num /= 2;
2611 }
2612
2613 /* inline check_device_access_params() */
2614 if (lba + num > sdebug_capacity) {
2615 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2616 return check_condition_result;
2617 }
2618 /* transfer length excessive (tie in to block limits VPD page) */
2619 if (num > sdebug_store_sectors) {
2620 /* needs work to find which cdb byte 'num' comes from */
2621 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2622 return check_condition_result;
2623 }
2624
2625 if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) &&
2626 (lba <= (OPT_MEDIUM_ERR_ADDR + OPT_MEDIUM_ERR_NUM - 1)) &&
2627 ((lba + num) > OPT_MEDIUM_ERR_ADDR)) {
2628 /* claim unrecoverable read error */
2629 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
2630 /* set info field and valid bit for fixed descriptor */
2631 if (0x70 == (scp->sense_buffer[0] & 0x7f)) {
2632 scp->sense_buffer[0] |= 0x80; /* Valid bit */
2633 ret = (lba < OPT_MEDIUM_ERR_ADDR)
2634 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
2635 put_unaligned_be32(ret, scp->sense_buffer + 3);
2636 }
2637 scsi_set_resid(scp, scsi_bufflen(scp));
2638 return check_condition_result;
2639 }
2640
2641 read_lock_irqsave(&atomic_rw, iflags);
2642
2643 /* DIX + T10 DIF */
2644 if (scsi_debug_dix && scsi_prot_sg_count(scp)) {
2645 int prot_ret = prot_verify_read(scp, lba, num, ei_lba);
2646
2647 if (prot_ret) {
2648 read_unlock_irqrestore(&atomic_rw, iflags);
2649 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, prot_ret);
2650 return illegal_condition_result;
2651 }
2652 }
2653
2654 ret = do_device_access(scp, lba, num, false);
2655 read_unlock_irqrestore(&atomic_rw, iflags);
2656 if (ret == -1)
2657 return DID_ERROR << 16;
2658
2659 scsi_in(scp)->resid = scsi_bufflen(scp) - ret;
2660
2661 if (sdebug_any_injecting_opt) {
2662 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
2663
2664 if (ep->inj_recovered) {
2665 mk_sense_buffer(scp, RECOVERED_ERROR,
2666 THRESHOLD_EXCEEDED, 0);
2667 return check_condition_result;
2668 } else if (ep->inj_transport) {
2669 mk_sense_buffer(scp, ABORTED_COMMAND,
2670 TRANSPORT_PROBLEM, ACK_NAK_TO);
2671 return check_condition_result;
2672 } else if (ep->inj_dif) {
2673 /* Logical block guard check failed */
2674 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
2675 return illegal_condition_result;
2676 } else if (ep->inj_dix) {
2677 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
2678 return illegal_condition_result;
2679 }
2680 }
2681 return 0;
2682}
2683
2684static void dump_sector(unsigned char *buf, int len)
2685{
2686 int i, j, n;
2687
2688 pr_err(">>> Sector Dump <<<\n");
2689 for (i = 0 ; i < len ; i += 16) {
2690 char b[128];
2691
2692 for (j = 0, n = 0; j < 16; j++) {
2693 unsigned char c = buf[i+j];
2694
2695 if (c >= 0x20 && c < 0x7e)
2696 n += scnprintf(b + n, sizeof(b) - n,
2697 " %c ", buf[i+j]);
2698 else
2699 n += scnprintf(b + n, sizeof(b) - n,
2700 "%02x ", buf[i+j]);
2701 }
2702 pr_err("%04d: %s\n", i, b);
2703 }
2704}
2705
2706static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
2707 unsigned int sectors, u32 ei_lba)
2708{
2709 int ret;
2710 struct sd_dif_tuple *sdt;
2711 void *daddr;
2712 sector_t sector = start_sec;
2713 int ppage_offset;
2714 int dpage_offset;
2715 struct sg_mapping_iter diter;
2716 struct sg_mapping_iter piter;
2717
2718 BUG_ON(scsi_sg_count(SCpnt) == 0);
2719 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
2720
2721 sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
2722 scsi_prot_sg_count(SCpnt),
2723 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
2724 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
2725 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
2726
2727 /* For each protection page */
2728 while (sg_miter_next(&piter)) {
2729 dpage_offset = 0;
2730 if (WARN_ON(!sg_miter_next(&diter))) {
2731 ret = 0x01;
2732 goto out;
2733 }
2734
2735 for (ppage_offset = 0; ppage_offset < piter.length;
2736 ppage_offset += sizeof(struct sd_dif_tuple)) {
2737 /* If we're at the end of the current
2738 * data page advance to the next one
2739 */
2740 if (dpage_offset >= diter.length) {
2741 if (WARN_ON(!sg_miter_next(&diter))) {
2742 ret = 0x01;
2743 goto out;
2744 }
2745 dpage_offset = 0;
2746 }
2747
2748 sdt = piter.addr + ppage_offset;
2749 daddr = diter.addr + dpage_offset;
2750
2751 ret = dif_verify(sdt, daddr, sector, ei_lba);
2752 if (ret) {
2753 dump_sector(daddr, scsi_debug_sector_size);
2754 goto out;
2755 }
2756
2757 sector++;
2758 ei_lba++;
2759 dpage_offset += scsi_debug_sector_size;
2760 }
2761 diter.consumed = dpage_offset;
2762 sg_miter_stop(&diter);
2763 }
2764 sg_miter_stop(&piter);
2765
2766 dif_copy_prot(SCpnt, start_sec, sectors, false);
2767 dix_writes++;
2768
2769 return 0;
2770
2771out:
2772 dif_errors++;
2773 sg_miter_stop(&diter);
2774 sg_miter_stop(&piter);
2775 return ret;
2776}
2777
2778static unsigned long lba_to_map_index(sector_t lba)
2779{
2780 if (scsi_debug_unmap_alignment) {
2781 lba += scsi_debug_unmap_granularity -
2782 scsi_debug_unmap_alignment;
2783 }
2784 sector_div(lba, scsi_debug_unmap_granularity);
2785
2786 return lba;
2787}
2788
2789static sector_t map_index_to_lba(unsigned long index)
2790{
2791 sector_t lba = index * scsi_debug_unmap_granularity;
2792
2793 if (scsi_debug_unmap_alignment) {
2794 lba -= scsi_debug_unmap_granularity -
2795 scsi_debug_unmap_alignment;
2796 }
2797
2798 return lba;
2799}
2800
2801static unsigned int map_state(sector_t lba, unsigned int *num)
2802{
2803 sector_t end;
2804 unsigned int mapped;
2805 unsigned long index;
2806 unsigned long next;
2807
2808 index = lba_to_map_index(lba);
2809 mapped = test_bit(index, map_storep);
2810
2811 if (mapped)
2812 next = find_next_zero_bit(map_storep, map_size, index);
2813 else
2814 next = find_next_bit(map_storep, map_size, index);
2815
2816 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
2817 *num = end - lba;
2818
2819 return mapped;
2820}
2821
2822static void map_region(sector_t lba, unsigned int len)
2823{
2824 sector_t end = lba + len;
2825
2826 while (lba < end) {
2827 unsigned long index = lba_to_map_index(lba);
2828
2829 if (index < map_size)
2830 set_bit(index, map_storep);
2831
2832 lba = map_index_to_lba(index + 1);
2833 }
2834}
2835
2836static void unmap_region(sector_t lba, unsigned int len)
2837{
2838 sector_t end = lba + len;
2839
2840 while (lba < end) {
2841 unsigned long index = lba_to_map_index(lba);
2842
2843 if (lba == map_index_to_lba(index) &&
2844 lba + scsi_debug_unmap_granularity <= end &&
2845 index < map_size) {
2846 clear_bit(index, map_storep);
2847 if (scsi_debug_lbprz) {
2848 memset(fake_storep +
2849 lba * scsi_debug_sector_size, 0,
2850 scsi_debug_sector_size *
2851 scsi_debug_unmap_granularity);
2852 }
2853 if (dif_storep) {
2854 memset(dif_storep + lba, 0xff,
2855 sizeof(*dif_storep) *
2856 scsi_debug_unmap_granularity);
2857 }
2858 }
2859 lba = map_index_to_lba(index + 1);
2860 }
2861}
2862
2863static int
2864resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2865{
2866 u8 *cmd = scp->cmnd;
2867 u64 lba;
2868 u32 num;
2869 u32 ei_lba;
2870 unsigned long iflags;
2871 int ret;
2872 bool check_prot;
2873
2874 switch (cmd[0]) {
2875 case WRITE_16:
2876 ei_lba = 0;
2877 lba = get_unaligned_be64(cmd + 2);
2878 num = get_unaligned_be32(cmd + 10);
2879 check_prot = true;
2880 break;
2881 case WRITE_10:
2882 ei_lba = 0;
2883 lba = get_unaligned_be32(cmd + 2);
2884 num = get_unaligned_be16(cmd + 7);
2885 check_prot = true;
2886 break;
2887 case WRITE_6:
2888 ei_lba = 0;
2889 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
2890 (u32)(cmd[1] & 0x1f) << 16;
2891 num = (0 == cmd[4]) ? 256 : cmd[4];
2892 check_prot = true;
2893 break;
2894 case WRITE_12:
2895 ei_lba = 0;
2896 lba = get_unaligned_be32(cmd + 2);
2897 num = get_unaligned_be32(cmd + 6);
2898 check_prot = true;
2899 break;
2900 case 0x53: /* XDWRITEREAD(10) */
2901 ei_lba = 0;
2902 lba = get_unaligned_be32(cmd + 2);
2903 num = get_unaligned_be16(cmd + 7);
2904 check_prot = false;
2905 break;
2906 default: /* assume WRITE(32) */
2907 lba = get_unaligned_be64(cmd + 12);
2908 ei_lba = get_unaligned_be32(cmd + 20);
2909 num = get_unaligned_be32(cmd + 28);
2910 check_prot = false;
2911 break;
2912 }
2913 if (check_prot) {
2914 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
2915 (cmd[1] & 0xe0)) {
2916 mk_sense_invalid_opcode(scp);
2917 return check_condition_result;
2918 }
2919 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
2920 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
2921 (cmd[1] & 0xe0) == 0)
2922 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
2923 "to DIF device\n");
2924 }
2925
2926 /* inline check_device_access_params() */
2927 if (lba + num > sdebug_capacity) {
2928 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2929 return check_condition_result;
2930 }
2931 /* transfer length excessive (tie in to block limits VPD page) */
2932 if (num > sdebug_store_sectors) {
2933 /* needs work to find which cdb byte 'num' comes from */
2934 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2935 return check_condition_result;
2936 }
2937
2938 write_lock_irqsave(&atomic_rw, iflags);
2939
2940 /* DIX + T10 DIF */
2941 if (scsi_debug_dix && scsi_prot_sg_count(scp)) {
2942 int prot_ret = prot_verify_write(scp, lba, num, ei_lba);
2943
2944 if (prot_ret) {
2945 write_unlock_irqrestore(&atomic_rw, iflags);
2946 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, prot_ret);
2947 return illegal_condition_result;
2948 }
2949 }
2950
2951 ret = do_device_access(scp, lba, num, true);
2952 if (scsi_debug_lbp())
2953 map_region(lba, num);
2954 write_unlock_irqrestore(&atomic_rw, iflags);
2955 if (-1 == ret)
2956 return (DID_ERROR << 16);
2957 else if ((ret < (num * scsi_debug_sector_size)) &&
2958 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2959 sdev_printk(KERN_INFO, scp->device,
2960 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
2961 my_name, num * scsi_debug_sector_size, ret);
2962
2963 if (sdebug_any_injecting_opt) {
2964 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
2965
2966 if (ep->inj_recovered) {
2967 mk_sense_buffer(scp, RECOVERED_ERROR,
2968 THRESHOLD_EXCEEDED, 0);
2969 return check_condition_result;
2970 } else if (ep->inj_dif) {
2971 /* Logical block guard check failed */
2972 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
2973 return illegal_condition_result;
2974 } else if (ep->inj_dix) {
2975 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
2976 return illegal_condition_result;
2977 }
2978 }
2979 return 0;
2980}
2981
2982static int
2983resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num, u32 ei_lba,
2984 bool unmap, bool ndob)
2985{
2986 unsigned long iflags;
2987 unsigned long long i;
2988 int ret;
2989
2990 ret = check_device_access_params(scp, lba, num);
2991 if (ret)
2992 return ret;
2993
2994 write_lock_irqsave(&atomic_rw, iflags);
2995
2996 if (unmap && scsi_debug_lbp()) {
2997 unmap_region(lba, num);
2998 goto out;
2999 }
3000
3001 /* if ndob then zero 1 logical block, else fetch 1 logical block */
3002 if (ndob) {
3003 memset(fake_storep + (lba * scsi_debug_sector_size), 0,
3004 scsi_debug_sector_size);
3005 ret = 0;
3006 } else
3007 ret = fetch_to_dev_buffer(scp, fake_storep +
3008 (lba * scsi_debug_sector_size),
3009 scsi_debug_sector_size);
3010
3011 if (-1 == ret) {
3012 write_unlock_irqrestore(&atomic_rw, iflags);
3013 return (DID_ERROR << 16);
3014 } else if ((ret < (num * scsi_debug_sector_size)) &&
3015 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
3016 sdev_printk(KERN_INFO, scp->device,
3017 "%s: %s: cdb indicated=%u, IO sent=%d bytes\n",
3018 my_name, "write same",
3019 num * scsi_debug_sector_size, ret);
3020
3021 /* Copy first sector to remaining blocks */
3022 for (i = 1 ; i < num ; i++)
3023 memcpy(fake_storep + ((lba + i) * scsi_debug_sector_size),
3024 fake_storep + (lba * scsi_debug_sector_size),
3025 scsi_debug_sector_size);
3026
3027 if (scsi_debug_lbp())
3028 map_region(lba, num);
3029out:
3030 write_unlock_irqrestore(&atomic_rw, iflags);
3031
3032 return 0;
3033}
3034
3035static int
3036resp_write_same_10(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3037{
3038 u8 *cmd = scp->cmnd;
3039 u32 lba;
3040 u16 num;
3041 u32 ei_lba = 0;
3042 bool unmap = false;
3043
3044 if (cmd[1] & 0x8) {
3045 if (scsi_debug_lbpws10 == 0) {
3046 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3047 return check_condition_result;
3048 } else
3049 unmap = true;
3050 }
3051 lba = get_unaligned_be32(cmd + 2);
3052 num = get_unaligned_be16(cmd + 7);
3053 if (num > scsi_debug_write_same_length) {
3054 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3055 return check_condition_result;
3056 }
3057 return resp_write_same(scp, lba, num, ei_lba, unmap, false);
3058}
3059
3060static int
3061resp_write_same_16(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3062{
3063 u8 *cmd = scp->cmnd;
3064 u64 lba;
3065 u32 num;
3066 u32 ei_lba = 0;
3067 bool unmap = false;
3068 bool ndob = false;
3069
3070 if (cmd[1] & 0x8) { /* UNMAP */
3071 if (scsi_debug_lbpws == 0) {
3072 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3073 return check_condition_result;
3074 } else
3075 unmap = true;
3076 }
3077 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */
3078 ndob = true;
3079 lba = get_unaligned_be64(cmd + 2);
3080 num = get_unaligned_be32(cmd + 10);
3081 if (num > scsi_debug_write_same_length) {
3082 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
3083 return check_condition_result;
3084 }
3085 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob);
3086}
3087
3088/* Note the mode field is in the same position as the (lower) service action
3089 * field. For the Report supported operation codes command, SPC-4 suggests
3090 * each mode of this command should be reported separately; for future. */
3091static int
3092resp_write_buffer(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3093{
3094 u8 *cmd = scp->cmnd;
3095 struct scsi_device *sdp = scp->device;
3096 struct sdebug_dev_info *dp;
3097 u8 mode;
3098
3099 mode = cmd[1] & 0x1f;
3100 switch (mode) {
3101 case 0x4: /* download microcode (MC) and activate (ACT) */
3102 /* set UAs on this device only */
3103 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3104 set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm);
3105 break;
3106 case 0x5: /* download MC, save and ACT */
3107 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm);
3108 break;
3109 case 0x6: /* download MC with offsets and ACT */
3110 /* set UAs on most devices (LUs) in this target */
3111 list_for_each_entry(dp,
3112 &devip->sdbg_host->dev_info_list,
3113 dev_list)
3114 if (dp->target == sdp->id) {
3115 set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm);
3116 if (devip != dp)
3117 set_bit(SDEBUG_UA_MICROCODE_CHANGED,
3118 dp->uas_bm);
3119 }
3120 break;
3121 case 0x7: /* download MC with offsets, save, and ACT */
3122 /* set UA on all devices (LUs) in this target */
3123 list_for_each_entry(dp,
3124 &devip->sdbg_host->dev_info_list,
3125 dev_list)
3126 if (dp->target == sdp->id)
3127 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET,
3128 dp->uas_bm);
3129 break;
3130 default:
3131 /* do nothing for this command for other mode values */
3132 break;
3133 }
3134 return 0;
3135}
3136
3137static int
3138resp_comp_write(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3139{
3140 u8 *cmd = scp->cmnd;
3141 u8 *arr;
3142 u8 *fake_storep_hold;
3143 u64 lba;
3144 u32 dnum;
3145 u32 lb_size = scsi_debug_sector_size;
3146 u8 num;
3147 unsigned long iflags;
3148 int ret;
3149 int retval = 0;
3150
3151 lba = get_unaligned_be64(cmd + 2);
3152 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */
3153 if (0 == num)
3154 return 0; /* degenerate case, not an error */
3155 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
3156 (cmd[1] & 0xe0)) {
3157 mk_sense_invalid_opcode(scp);
3158 return check_condition_result;
3159 }
3160 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
3161 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
3162 (cmd[1] & 0xe0) == 0)
3163 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3164 "to DIF device\n");
3165
3166 /* inline check_device_access_params() */
3167 if (lba + num > sdebug_capacity) {
3168 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
3169 return check_condition_result;
3170 }
3171 /* transfer length excessive (tie in to block limits VPD page) */
3172 if (num > sdebug_store_sectors) {
3173 /* needs work to find which cdb byte 'num' comes from */
3174 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3175 return check_condition_result;
3176 }
3177 dnum = 2 * num;
3178 arr = kzalloc(dnum * lb_size, GFP_ATOMIC);
3179 if (NULL == arr) {
3180 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3181 INSUFF_RES_ASCQ);
3182 return check_condition_result;
3183 }
3184
3185 write_lock_irqsave(&atomic_rw, iflags);
3186
3187 /* trick do_device_access() to fetch both compare and write buffers
3188 * from data-in into arr. Safe (atomic) since write_lock held. */
3189 fake_storep_hold = fake_storep;
3190 fake_storep = arr;
3191 ret = do_device_access(scp, 0, dnum, true);
3192 fake_storep = fake_storep_hold;
3193 if (ret == -1) {
3194 retval = DID_ERROR << 16;
3195 goto cleanup;
3196 } else if ((ret < (dnum * lb_size)) &&
3197 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
3198 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb "
3199 "indicated=%u, IO sent=%d bytes\n", my_name,
3200 dnum * lb_size, ret);
3201 if (!comp_write_worker(lba, num, arr)) {
3202 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
3203 retval = check_condition_result;
3204 goto cleanup;
3205 }
3206 if (scsi_debug_lbp())
3207 map_region(lba, num);
3208cleanup:
3209 write_unlock_irqrestore(&atomic_rw, iflags);
3210 kfree(arr);
3211 return retval;
3212}
3213
3214struct unmap_block_desc {
3215 __be64 lba;
3216 __be32 blocks;
3217 __be32 __reserved;
3218};
3219
3220static int
3221resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3222{
3223 unsigned char *buf;
3224 struct unmap_block_desc *desc;
3225 unsigned int i, payload_len, descriptors;
3226 int ret;
3227 unsigned long iflags;
3228
3229
3230 if (!scsi_debug_lbp())
3231 return 0; /* fib and say its done */
3232 payload_len = get_unaligned_be16(scp->cmnd + 7);
3233 BUG_ON(scsi_bufflen(scp) != payload_len);
3234
3235 descriptors = (payload_len - 8) / 16;
3236 if (descriptors > scsi_debug_unmap_max_desc) {
3237 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3238 return check_condition_result;
3239 }
3240
3241 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
3242 if (!buf) {
3243 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3244 INSUFF_RES_ASCQ);
3245 return check_condition_result;
3246 }
3247
3248 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
3249
3250 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
3251 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
3252
3253 desc = (void *)&buf[8];
3254
3255 write_lock_irqsave(&atomic_rw, iflags);
3256
3257 for (i = 0 ; i < descriptors ; i++) {
3258 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
3259 unsigned int num = get_unaligned_be32(&desc[i].blocks);
3260
3261 ret = check_device_access_params(scp, lba, num);
3262 if (ret)
3263 goto out;
3264
3265 unmap_region(lba, num);
3266 }
3267
3268 ret = 0;
3269
3270out:
3271 write_unlock_irqrestore(&atomic_rw, iflags);
3272 kfree(buf);
3273
3274 return ret;
3275}
3276
3277#define SDEBUG_GET_LBA_STATUS_LEN 32
3278
3279static int
3280resp_get_lba_status(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3281{
3282 u8 *cmd = scp->cmnd;
3283 u64 lba;
3284 u32 alloc_len, mapped, num;
3285 u8 arr[SDEBUG_GET_LBA_STATUS_LEN];
3286 int ret;
3287
3288 lba = get_unaligned_be64(cmd + 2);
3289 alloc_len = get_unaligned_be32(cmd + 10);
3290
3291 if (alloc_len < 24)
3292 return 0;
3293
3294 ret = check_device_access_params(scp, lba, 1);
3295 if (ret)
3296 return ret;
3297
3298 if (scsi_debug_lbp())
3299 mapped = map_state(lba, &num);
3300 else {
3301 mapped = 1;
3302 /* following just in case virtual_gb changed */
3303 sdebug_capacity = get_sdebug_capacity();
3304 if (sdebug_capacity - lba <= 0xffffffff)
3305 num = sdebug_capacity - lba;
3306 else
3307 num = 0xffffffff;
3308 }
3309
3310 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
3311 put_unaligned_be32(20, arr); /* Parameter Data Length */
3312 put_unaligned_be64(lba, arr + 8); /* LBA */
3313 put_unaligned_be32(num, arr + 16); /* Number of blocks */
3314 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */
3315
3316 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN);
3317}
3318
3319#define SDEBUG_RLUN_ARR_SZ 256
3320
3321static int resp_report_luns(struct scsi_cmnd * scp,
3322 struct sdebug_dev_info * devip)
3323{
3324 unsigned int alloc_len;
3325 int lun_cnt, i, upper, num, n, want_wlun, shortish;
3326 u64 lun;
3327 unsigned char *cmd = scp->cmnd;
3328 int select_report = (int)cmd[2];
3329 struct scsi_lun *one_lun;
3330 unsigned char arr[SDEBUG_RLUN_ARR_SZ];
3331 unsigned char * max_addr;
3332
3333 clear_luns_changed_on_target(devip);
3334 alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
3335 shortish = (alloc_len < 4);
3336 if (shortish || (select_report > 2)) {
3337 mk_sense_invalid_fld(scp, SDEB_IN_CDB, shortish ? 6 : 2, -1);
3338 return check_condition_result;
3339 }
3340 /* can produce response with up to 16k luns (lun 0 to lun 16383) */
3341 memset(arr, 0, SDEBUG_RLUN_ARR_SZ);
3342 lun_cnt = scsi_debug_max_luns;
3343 if (1 == select_report)
3344 lun_cnt = 0;
3345 else if (scsi_debug_no_lun_0 && (lun_cnt > 0))
3346 --lun_cnt;
3347 want_wlun = (select_report > 0) ? 1 : 0;
3348 num = lun_cnt + want_wlun;
3349 arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff;
3350 arr[3] = (sizeof(struct scsi_lun) * num) & 0xff;
3351 n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) /
3352 sizeof(struct scsi_lun)), num);
3353 if (n < num) {
3354 want_wlun = 0;
3355 lun_cnt = n;
3356 }
3357 one_lun = (struct scsi_lun *) &arr[8];
3358 max_addr = arr + SDEBUG_RLUN_ARR_SZ;
3359 for (i = 0, lun = (scsi_debug_no_lun_0 ? 1 : 0);
3360 ((i < lun_cnt) && ((unsigned char *)(one_lun + i) < max_addr));
3361 i++, lun++) {
3362 upper = (lun >> 8) & 0x3f;
3363 if (upper)
3364 one_lun[i].scsi_lun[0] =
3365 (upper | (SAM2_LUN_ADDRESS_METHOD << 6));
3366 one_lun[i].scsi_lun[1] = lun & 0xff;
3367 }
3368 if (want_wlun) {
3369 one_lun[i].scsi_lun[0] = (SCSI_W_LUN_REPORT_LUNS >> 8) & 0xff;
3370 one_lun[i].scsi_lun[1] = SCSI_W_LUN_REPORT_LUNS & 0xff;
3371 i++;
3372 }
3373 alloc_len = (unsigned char *)(one_lun + i) - arr;
3374 return fill_from_dev_buffer(scp, arr,
3375 min((int)alloc_len, SDEBUG_RLUN_ARR_SZ));
3376}
3377
3378static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
3379 unsigned int num, struct sdebug_dev_info *devip)
3380{
3381 int j;
3382 unsigned char *kaddr, *buf;
3383 unsigned int offset;
3384 struct scsi_data_buffer *sdb = scsi_in(scp);
3385 struct sg_mapping_iter miter;
3386
3387 /* better not to use temporary buffer. */
3388 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
3389 if (!buf) {
3390 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3391 INSUFF_RES_ASCQ);
3392 return check_condition_result;
3393 }
3394
3395 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
3396
3397 offset = 0;
3398 sg_miter_start(&miter, sdb->table.sgl, sdb->table.nents,
3399 SG_MITER_ATOMIC | SG_MITER_TO_SG);
3400
3401 while (sg_miter_next(&miter)) {
3402 kaddr = miter.addr;
3403 for (j = 0; j < miter.length; j++)
3404 *(kaddr + j) ^= *(buf + offset + j);
3405
3406 offset += miter.length;
3407 }
3408 sg_miter_stop(&miter);
3409 kfree(buf);
3410
3411 return 0;
3412}
3413
3414static int
3415resp_xdwriteread_10(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3416{
3417 u8 *cmd = scp->cmnd;
3418 u64 lba;
3419 u32 num;
3420 int errsts;
3421
3422 if (!scsi_bidi_cmnd(scp)) {
3423 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3424 INSUFF_RES_ASCQ);
3425 return check_condition_result;
3426 }
3427 errsts = resp_read_dt0(scp, devip);
3428 if (errsts)
3429 return errsts;
3430 if (!(cmd[1] & 0x4)) { /* DISABLE_WRITE is not set */
3431 errsts = resp_write_dt0(scp, devip);
3432 if (errsts)
3433 return errsts;
3434 }
3435 lba = get_unaligned_be32(cmd + 2);
3436 num = get_unaligned_be16(cmd + 7);
3437 return resp_xdwriteread(scp, lba, num, devip);
3438}
3439
3440/* When timer or tasklet goes off this function is called. */
3441static void sdebug_q_cmd_complete(unsigned long indx)
3442{
3443 int qa_indx;
3444 int retiring = 0;
3445 unsigned long iflags;
3446 struct sdebug_queued_cmd *sqcp;
3447 struct scsi_cmnd *scp;
3448 struct sdebug_dev_info *devip;
3449
3450 atomic_inc(&sdebug_completions);
3451 qa_indx = indx;
3452 if ((qa_indx < 0) || (qa_indx >= SCSI_DEBUG_CANQUEUE)) {
3453 pr_err("wild qa_indx=%d\n", qa_indx);
3454 return;
3455 }
3456 spin_lock_irqsave(&queued_arr_lock, iflags);
3457 sqcp = &queued_arr[qa_indx];
3458 scp = sqcp->a_cmnd;
3459 if (NULL == scp) {
3460 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3461 pr_err("scp is NULL\n");
3462 return;
3463 }
3464 devip = (struct sdebug_dev_info *)scp->device->hostdata;
3465 if (devip)
3466 atomic_dec(&devip->num_in_q);
3467 else
3468 pr_err("devip=NULL\n");
3469 if (atomic_read(&retired_max_queue) > 0)
3470 retiring = 1;
3471
3472 sqcp->a_cmnd = NULL;
3473 if (!test_and_clear_bit(qa_indx, queued_in_use_bm)) {
3474 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3475 pr_err("Unexpected completion\n");
3476 return;
3477 }
3478
3479 if (unlikely(retiring)) { /* user has reduced max_queue */
3480 int k, retval;
3481
3482 retval = atomic_read(&retired_max_queue);
3483 if (qa_indx >= retval) {
3484 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3485 pr_err("index %d too large\n", retval);
3486 return;
3487 }
3488 k = find_last_bit(queued_in_use_bm, retval);
3489 if ((k < scsi_debug_max_queue) || (k == retval))
3490 atomic_set(&retired_max_queue, 0);
3491 else
3492 atomic_set(&retired_max_queue, k + 1);
3493 }
3494 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3495 scp->scsi_done(scp); /* callback to mid level */
3496}
3497
3498/* When high resolution timer goes off this function is called. */
3499static enum hrtimer_restart
3500sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
3501{
3502 int qa_indx;
3503 int retiring = 0;
3504 unsigned long iflags;
3505 struct sdebug_hrtimer *sd_hrtp = (struct sdebug_hrtimer *)timer;
3506 struct sdebug_queued_cmd *sqcp;
3507 struct scsi_cmnd *scp;
3508 struct sdebug_dev_info *devip;
3509
3510 atomic_inc(&sdebug_completions);
3511 qa_indx = sd_hrtp->qa_indx;
3512 if ((qa_indx < 0) || (qa_indx >= SCSI_DEBUG_CANQUEUE)) {
3513 pr_err("wild qa_indx=%d\n", qa_indx);
3514 goto the_end;
3515 }
3516 spin_lock_irqsave(&queued_arr_lock, iflags);
3517 sqcp = &queued_arr[qa_indx];
3518 scp = sqcp->a_cmnd;
3519 if (NULL == scp) {
3520 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3521 pr_err("scp is NULL\n");
3522 goto the_end;
3523 }
3524 devip = (struct sdebug_dev_info *)scp->device->hostdata;
3525 if (devip)
3526 atomic_dec(&devip->num_in_q);
3527 else
3528 pr_err("devip=NULL\n");
3529 if (atomic_read(&retired_max_queue) > 0)
3530 retiring = 1;
3531
3532 sqcp->a_cmnd = NULL;
3533 if (!test_and_clear_bit(qa_indx, queued_in_use_bm)) {
3534 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3535 pr_err("Unexpected completion\n");
3536 goto the_end;
3537 }
3538
3539 if (unlikely(retiring)) { /* user has reduced max_queue */
3540 int k, retval;
3541
3542 retval = atomic_read(&retired_max_queue);
3543 if (qa_indx >= retval) {
3544 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3545 pr_err("index %d too large\n", retval);
3546 goto the_end;
3547 }
3548 k = find_last_bit(queued_in_use_bm, retval);
3549 if ((k < scsi_debug_max_queue) || (k == retval))
3550 atomic_set(&retired_max_queue, 0);
3551 else
3552 atomic_set(&retired_max_queue, k + 1);
3553 }
3554 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3555 scp->scsi_done(scp); /* callback to mid level */
3556the_end:
3557 return HRTIMER_NORESTART;
3558}
3559
3560static struct sdebug_dev_info *
3561sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags)
3562{
3563 struct sdebug_dev_info *devip;
3564
3565 devip = kzalloc(sizeof(*devip), flags);
3566 if (devip) {
3567 devip->sdbg_host = sdbg_host;
3568 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
3569 }
3570 return devip;
3571}
3572
3573static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev)
3574{
3575 struct sdebug_host_info * sdbg_host;
3576 struct sdebug_dev_info * open_devip = NULL;
3577 struct sdebug_dev_info * devip =
3578 (struct sdebug_dev_info *)sdev->hostdata;
3579
3580 if (devip)
3581 return devip;
3582 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
3583 if (!sdbg_host) {
3584 pr_err("Host info NULL\n");
3585 return NULL;
3586 }
3587 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
3588 if ((devip->used) && (devip->channel == sdev->channel) &&
3589 (devip->target == sdev->id) &&
3590 (devip->lun == sdev->lun))
3591 return devip;
3592 else {
3593 if ((!devip->used) && (!open_devip))
3594 open_devip = devip;
3595 }
3596 }
3597 if (!open_devip) { /* try and make a new one */
3598 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
3599 if (!open_devip) {
3600 pr_err("out of memory at line %d\n", __LINE__);
3601 return NULL;
3602 }
3603 }
3604
3605 open_devip->channel = sdev->channel;
3606 open_devip->target = sdev->id;
3607 open_devip->lun = sdev->lun;
3608 open_devip->sdbg_host = sdbg_host;
3609 atomic_set(&open_devip->num_in_q, 0);
3610 set_bit(SDEBUG_UA_POR, open_devip->uas_bm);
3611 open_devip->used = true;
3612 return open_devip;
3613}
3614
3615static int scsi_debug_slave_alloc(struct scsi_device *sdp)
3616{
3617 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3618 pr_info("slave_alloc <%u %u %u %llu>\n",
3619 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3620 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue);
3621 return 0;
3622}
3623
3624static int scsi_debug_slave_configure(struct scsi_device *sdp)
3625{
3626 struct sdebug_dev_info *devip;
3627
3628 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3629 pr_info("slave_configure <%u %u %u %llu>\n",
3630 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3631 if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN)
3632 sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN;
3633 devip = devInfoReg(sdp);
3634 if (NULL == devip)
3635 return 1; /* no resources, will be marked offline */
3636 sdp->hostdata = devip;
3637 blk_queue_max_segment_size(sdp->request_queue, -1U);
3638 if (scsi_debug_no_uld)
3639 sdp->no_uld_attach = 1;
3640 return 0;
3641}
3642
3643static void scsi_debug_slave_destroy(struct scsi_device *sdp)
3644{
3645 struct sdebug_dev_info *devip =
3646 (struct sdebug_dev_info *)sdp->hostdata;
3647
3648 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3649 pr_info("slave_destroy <%u %u %u %llu>\n",
3650 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3651 if (devip) {
3652 /* make this slot available for re-use */
3653 devip->used = false;
3654 sdp->hostdata = NULL;
3655 }
3656}
3657
3658/* Returns 1 if cmnd found (deletes its timer or tasklet), else returns 0 */
3659static int stop_queued_cmnd(struct scsi_cmnd *cmnd)
3660{
3661 unsigned long iflags;
3662 int k, qmax, r_qmax;
3663 struct sdebug_queued_cmd *sqcp;
3664 struct sdebug_dev_info *devip;
3665
3666 spin_lock_irqsave(&queued_arr_lock, iflags);
3667 qmax = scsi_debug_max_queue;
3668 r_qmax = atomic_read(&retired_max_queue);
3669 if (r_qmax > qmax)
3670 qmax = r_qmax;
3671 for (k = 0; k < qmax; ++k) {
3672 if (test_bit(k, queued_in_use_bm)) {
3673 sqcp = &queued_arr[k];
3674 if (cmnd == sqcp->a_cmnd) {
3675 devip = (struct sdebug_dev_info *)
3676 cmnd->device->hostdata;
3677 if (devip)
3678 atomic_dec(&devip->num_in_q);
3679 sqcp->a_cmnd = NULL;
3680 spin_unlock_irqrestore(&queued_arr_lock,
3681 iflags);
3682 if (scsi_debug_ndelay > 0) {
3683 if (sqcp->sd_hrtp)
3684 hrtimer_cancel(
3685 &sqcp->sd_hrtp->hrt);
3686 } else if (scsi_debug_delay > 0) {
3687 if (sqcp->cmnd_timerp)
3688 del_timer_sync(
3689 sqcp->cmnd_timerp);
3690 } else if (scsi_debug_delay < 0) {
3691 if (sqcp->tletp)
3692 tasklet_kill(sqcp->tletp);
3693 }
3694 clear_bit(k, queued_in_use_bm);
3695 return 1;
3696 }
3697 }
3698 }
3699 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3700 return 0;
3701}
3702
3703/* Deletes (stops) timers or tasklets of all queued commands */
3704static void stop_all_queued(void)
3705{
3706 unsigned long iflags;
3707 int k;
3708 struct sdebug_queued_cmd *sqcp;
3709 struct sdebug_dev_info *devip;
3710
3711 spin_lock_irqsave(&queued_arr_lock, iflags);
3712 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
3713 if (test_bit(k, queued_in_use_bm)) {
3714 sqcp = &queued_arr[k];
3715 if (sqcp->a_cmnd) {
3716 devip = (struct sdebug_dev_info *)
3717 sqcp->a_cmnd->device->hostdata;
3718 if (devip)
3719 atomic_dec(&devip->num_in_q);
3720 sqcp->a_cmnd = NULL;
3721 spin_unlock_irqrestore(&queued_arr_lock,
3722 iflags);
3723 if (scsi_debug_ndelay > 0) {
3724 if (sqcp->sd_hrtp)
3725 hrtimer_cancel(
3726 &sqcp->sd_hrtp->hrt);
3727 } else if (scsi_debug_delay > 0) {
3728 if (sqcp->cmnd_timerp)
3729 del_timer_sync(
3730 sqcp->cmnd_timerp);
3731 } else if (scsi_debug_delay < 0) {
3732 if (sqcp->tletp)
3733 tasklet_kill(sqcp->tletp);
3734 }
3735 clear_bit(k, queued_in_use_bm);
3736 spin_lock_irqsave(&queued_arr_lock, iflags);
3737 }
3738 }
3739 }
3740 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3741}
3742
3743/* Free queued command memory on heap */
3744static void free_all_queued(void)
3745{
3746 unsigned long iflags;
3747 int k;
3748 struct sdebug_queued_cmd *sqcp;
3749
3750 spin_lock_irqsave(&queued_arr_lock, iflags);
3751 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
3752 sqcp = &queued_arr[k];
3753 kfree(sqcp->cmnd_timerp);
3754 sqcp->cmnd_timerp = NULL;
3755 kfree(sqcp->tletp);
3756 sqcp->tletp = NULL;
3757 kfree(sqcp->sd_hrtp);
3758 sqcp->sd_hrtp = NULL;
3759 }
3760 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3761}
3762
3763static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
3764{
3765 ++num_aborts;
3766 if (SCpnt) {
3767 if (SCpnt->device &&
3768 (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts))
3769 sdev_printk(KERN_INFO, SCpnt->device, "%s\n",
3770 __func__);
3771 stop_queued_cmnd(SCpnt);
3772 }
3773 return SUCCESS;
3774}
3775
3776static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
3777{
3778 struct sdebug_dev_info * devip;
3779
3780 ++num_dev_resets;
3781 if (SCpnt && SCpnt->device) {
3782 struct scsi_device *sdp = SCpnt->device;
3783
3784 if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
3785 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3786 devip = devInfoReg(sdp);
3787 if (devip)
3788 set_bit(SDEBUG_UA_POR, devip->uas_bm);
3789 }
3790 return SUCCESS;
3791}
3792
3793static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
3794{
3795 struct sdebug_host_info *sdbg_host;
3796 struct sdebug_dev_info *devip;
3797 struct scsi_device *sdp;
3798 struct Scsi_Host *hp;
3799 int k = 0;
3800
3801 ++num_target_resets;
3802 if (!SCpnt)
3803 goto lie;
3804 sdp = SCpnt->device;
3805 if (!sdp)
3806 goto lie;
3807 if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
3808 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3809 hp = sdp->host;
3810 if (!hp)
3811 goto lie;
3812 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
3813 if (sdbg_host) {
3814 list_for_each_entry(devip,
3815 &sdbg_host->dev_info_list,
3816 dev_list)
3817 if (devip->target == sdp->id) {
3818 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3819 ++k;
3820 }
3821 }
3822 if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
3823 sdev_printk(KERN_INFO, sdp,
3824 "%s: %d device(s) found in target\n", __func__, k);
3825lie:
3826 return SUCCESS;
3827}
3828
3829static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
3830{
3831 struct sdebug_host_info *sdbg_host;
3832 struct sdebug_dev_info *devip;
3833 struct scsi_device * sdp;
3834 struct Scsi_Host * hp;
3835 int k = 0;
3836
3837 ++num_bus_resets;
3838 if (!(SCpnt && SCpnt->device))
3839 goto lie;
3840 sdp = SCpnt->device;
3841 if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
3842 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3843 hp = sdp->host;
3844 if (hp) {
3845 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
3846 if (sdbg_host) {
3847 list_for_each_entry(devip,
3848 &sdbg_host->dev_info_list,
3849 dev_list) {
3850 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3851 ++k;
3852 }
3853 }
3854 }
3855 if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
3856 sdev_printk(KERN_INFO, sdp,
3857 "%s: %d device(s) found in host\n", __func__, k);
3858lie:
3859 return SUCCESS;
3860}
3861
3862static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
3863{
3864 struct sdebug_host_info * sdbg_host;
3865 struct sdebug_dev_info *devip;
3866 int k = 0;
3867
3868 ++num_host_resets;
3869 if ((SCpnt->device) && (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts))
3870 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
3871 spin_lock(&sdebug_host_list_lock);
3872 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
3873 list_for_each_entry(devip, &sdbg_host->dev_info_list,
3874 dev_list) {
3875 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3876 ++k;
3877 }
3878 }
3879 spin_unlock(&sdebug_host_list_lock);
3880 stop_all_queued();
3881 if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
3882 sdev_printk(KERN_INFO, SCpnt->device,
3883 "%s: %d device(s) found\n", __func__, k);
3884 return SUCCESS;
3885}
3886
3887static void __init sdebug_build_parts(unsigned char *ramp,
3888 unsigned long store_size)
3889{
3890 struct partition * pp;
3891 int starts[SDEBUG_MAX_PARTS + 2];
3892 int sectors_per_part, num_sectors, k;
3893 int heads_by_sects, start_sec, end_sec;
3894
3895 /* assume partition table already zeroed */
3896 if ((scsi_debug_num_parts < 1) || (store_size < 1048576))
3897 return;
3898 if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) {
3899 scsi_debug_num_parts = SDEBUG_MAX_PARTS;
3900 pr_warn("reducing partitions to %d\n", SDEBUG_MAX_PARTS);
3901 }
3902 num_sectors = (int)sdebug_store_sectors;
3903 sectors_per_part = (num_sectors - sdebug_sectors_per)
3904 / scsi_debug_num_parts;
3905 heads_by_sects = sdebug_heads * sdebug_sectors_per;
3906 starts[0] = sdebug_sectors_per;
3907 for (k = 1; k < scsi_debug_num_parts; ++k)
3908 starts[k] = ((k * sectors_per_part) / heads_by_sects)
3909 * heads_by_sects;
3910 starts[scsi_debug_num_parts] = num_sectors;
3911 starts[scsi_debug_num_parts + 1] = 0;
3912
3913 ramp[510] = 0x55; /* magic partition markings */
3914 ramp[511] = 0xAA;
3915 pp = (struct partition *)(ramp + 0x1be);
3916 for (k = 0; starts[k + 1]; ++k, ++pp) {
3917 start_sec = starts[k];
3918 end_sec = starts[k + 1] - 1;
3919 pp->boot_ind = 0;
3920
3921 pp->cyl = start_sec / heads_by_sects;
3922 pp->head = (start_sec - (pp->cyl * heads_by_sects))
3923 / sdebug_sectors_per;
3924 pp->sector = (start_sec % sdebug_sectors_per) + 1;
3925
3926 pp->end_cyl = end_sec / heads_by_sects;
3927 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
3928 / sdebug_sectors_per;
3929 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
3930
3931 pp->start_sect = cpu_to_le32(start_sec);
3932 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
3933 pp->sys_ind = 0x83; /* plain Linux partition */
3934 }
3935}
3936
3937static int
3938schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
3939 int scsi_result, int delta_jiff)
3940{
3941 unsigned long iflags;
3942 int k, num_in_q, qdepth, inject;
3943 struct sdebug_queued_cmd *sqcp = NULL;
3944 struct scsi_device *sdp;
3945
3946 /* this should never happen */
3947 if (WARN_ON(!cmnd))
3948 return SCSI_MLQUEUE_HOST_BUSY;
3949
3950 if (NULL == devip) {
3951 pr_warn("called devip == NULL\n");
3952 /* no particularly good error to report back */
3953 return SCSI_MLQUEUE_HOST_BUSY;
3954 }
3955
3956 sdp = cmnd->device;
3957
3958 if ((scsi_result) && (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
3959 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
3960 __func__, scsi_result);
3961 if (delta_jiff == 0)
3962 goto respond_in_thread;
3963
3964 /* schedule the response at a later time if resources permit */
3965 spin_lock_irqsave(&queued_arr_lock, iflags);
3966 num_in_q = atomic_read(&devip->num_in_q);
3967 qdepth = cmnd->device->queue_depth;
3968 inject = 0;
3969 if ((qdepth > 0) && (num_in_q >= qdepth)) {
3970 if (scsi_result) {
3971 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3972 goto respond_in_thread;
3973 } else
3974 scsi_result = device_qfull_result;
3975 } else if ((scsi_debug_every_nth != 0) &&
3976 (SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts) &&
3977 (scsi_result == 0)) {
3978 if ((num_in_q == (qdepth - 1)) &&
3979 (atomic_inc_return(&sdebug_a_tsf) >=
3980 abs(scsi_debug_every_nth))) {
3981 atomic_set(&sdebug_a_tsf, 0);
3982 inject = 1;
3983 scsi_result = device_qfull_result;
3984 }
3985 }
3986
3987 k = find_first_zero_bit(queued_in_use_bm, scsi_debug_max_queue);
3988 if (k >= scsi_debug_max_queue) {
3989 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3990 if (scsi_result)
3991 goto respond_in_thread;
3992 else if (SCSI_DEBUG_OPT_ALL_TSF & scsi_debug_opts)
3993 scsi_result = device_qfull_result;
3994 if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts)
3995 sdev_printk(KERN_INFO, sdp,
3996 "%s: max_queue=%d exceeded, %s\n",
3997 __func__, scsi_debug_max_queue,
3998 (scsi_result ? "status: TASK SET FULL" :
3999 "report: host busy"));
4000 if (scsi_result)
4001 goto respond_in_thread;
4002 else
4003 return SCSI_MLQUEUE_HOST_BUSY;
4004 }
4005 __set_bit(k, queued_in_use_bm);
4006 atomic_inc(&devip->num_in_q);
4007 sqcp = &queued_arr[k];
4008 sqcp->a_cmnd = cmnd;
4009 cmnd->result = scsi_result;
4010 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4011 if (delta_jiff > 0) {
4012 if (NULL == sqcp->cmnd_timerp) {
4013 sqcp->cmnd_timerp = kmalloc(sizeof(struct timer_list),
4014 GFP_ATOMIC);
4015 if (NULL == sqcp->cmnd_timerp)
4016 return SCSI_MLQUEUE_HOST_BUSY;
4017 init_timer(sqcp->cmnd_timerp);
4018 }
4019 sqcp->cmnd_timerp->function = sdebug_q_cmd_complete;
4020 sqcp->cmnd_timerp->data = k;
4021 sqcp->cmnd_timerp->expires = get_jiffies_64() + delta_jiff;
4022 add_timer(sqcp->cmnd_timerp);
4023 } else if (scsi_debug_ndelay > 0) {
4024 ktime_t kt = ktime_set(0, scsi_debug_ndelay);
4025 struct sdebug_hrtimer *sd_hp = sqcp->sd_hrtp;
4026
4027 if (NULL == sd_hp) {
4028 sd_hp = kmalloc(sizeof(*sd_hp), GFP_ATOMIC);
4029 if (NULL == sd_hp)
4030 return SCSI_MLQUEUE_HOST_BUSY;
4031 sqcp->sd_hrtp = sd_hp;
4032 hrtimer_init(&sd_hp->hrt, CLOCK_MONOTONIC,
4033 HRTIMER_MODE_REL);
4034 sd_hp->hrt.function = sdebug_q_cmd_hrt_complete;
4035 sd_hp->qa_indx = k;
4036 }
4037 hrtimer_start(&sd_hp->hrt, kt, HRTIMER_MODE_REL);
4038 } else { /* delay < 0 */
4039 if (NULL == sqcp->tletp) {
4040 sqcp->tletp = kmalloc(sizeof(*sqcp->tletp),
4041 GFP_ATOMIC);
4042 if (NULL == sqcp->tletp)
4043 return SCSI_MLQUEUE_HOST_BUSY;
4044 tasklet_init(sqcp->tletp,
4045 sdebug_q_cmd_complete, k);
4046 }
4047 if (-1 == delta_jiff)
4048 tasklet_hi_schedule(sqcp->tletp);
4049 else
4050 tasklet_schedule(sqcp->tletp);
4051 }
4052 if ((SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) &&
4053 (scsi_result == device_qfull_result))
4054 sdev_printk(KERN_INFO, sdp,
4055 "%s: num_in_q=%d +1, %s%s\n", __func__,
4056 num_in_q, (inject ? "<inject> " : ""),
4057 "status: TASK SET FULL");
4058 return 0;
4059
4060respond_in_thread: /* call back to mid-layer using invocation thread */
4061 cmnd->result = scsi_result;
4062 cmnd->scsi_done(cmnd);
4063 return 0;
4064}
4065
4066/* Note: The following macros create attribute files in the
4067 /sys/module/scsi_debug/parameters directory. Unfortunately this
4068 driver is unaware of a change and cannot trigger auxiliary actions
4069 as it can when the corresponding attribute in the
4070 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
4071 */
4072module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR);
4073module_param_named(ato, scsi_debug_ato, int, S_IRUGO);
4074module_param_named(clustering, scsi_debug_clustering, bool, S_IRUGO | S_IWUSR);
4075module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR);
4076module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO);
4077module_param_named(dif, scsi_debug_dif, int, S_IRUGO);
4078module_param_named(dix, scsi_debug_dix, int, S_IRUGO);
4079module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR);
4080module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR);
4081module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR);
4082module_param_named(guard, scsi_debug_guard, uint, S_IRUGO);
4083module_param_named(host_lock, scsi_debug_host_lock, bool, S_IRUGO | S_IWUSR);
4084module_param_named(lbpu, scsi_debug_lbpu, int, S_IRUGO);
4085module_param_named(lbpws, scsi_debug_lbpws, int, S_IRUGO);
4086module_param_named(lbpws10, scsi_debug_lbpws10, int, S_IRUGO);
4087module_param_named(lbprz, scsi_debug_lbprz, int, S_IRUGO);
4088module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO);
4089module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR);
4090module_param_named(max_queue, scsi_debug_max_queue, int, S_IRUGO | S_IWUSR);
4091module_param_named(ndelay, scsi_debug_ndelay, int, S_IRUGO | S_IWUSR);
4092module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR);
4093module_param_named(no_uld, scsi_debug_no_uld, int, S_IRUGO);
4094module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO);
4095module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR);
4096module_param_named(opt_blks, scsi_debug_opt_blks, int, S_IRUGO);
4097module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR);
4098module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO);
4099module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR);
4100module_param_named(removable, scsi_debug_removable, bool, S_IRUGO | S_IWUSR);
4101module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO);
4102module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO);
4103module_param_named(strict, scsi_debug_strict, bool, S_IRUGO | S_IWUSR);
4104module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO);
4105module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO);
4106module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO);
4107module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, int, S_IRUGO);
4108module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR);
4109module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int,
4110 S_IRUGO | S_IWUSR);
4111module_param_named(write_same_length, scsi_debug_write_same_length, int,
4112 S_IRUGO | S_IWUSR);
4113
4114MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
4115MODULE_DESCRIPTION("SCSI debug adapter driver");
4116MODULE_LICENSE("GPL");
4117MODULE_VERSION(SCSI_DEBUG_VERSION);
4118
4119MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
4120MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
4121MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
4122MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
4123MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)");
4124MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
4125MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
4126MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
4127MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
4128MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
4129MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
4130MODULE_PARM_DESC(host_lock, "use host_lock around all commands (def=0)");
4131MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
4132MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
4133MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
4134MODULE_PARM_DESC(lbprz, "unmapped blocks return 0 on read (def=1)");
4135MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
4136MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
4137MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
4138MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
4139MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
4140MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
4141MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
4142MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
4143MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)");
4144MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
4145MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
4146MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
4147MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
4148MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=6[SPC-4])");
4149MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
4150MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)");
4151MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
4152MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
4153MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
4154MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
4155MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)");
4156MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
4157MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
4158
4159static char sdebug_info[256];
4160
4161static const char * scsi_debug_info(struct Scsi_Host * shp)
4162{
4163 sprintf(sdebug_info, "scsi_debug, version %s [%s], "
4164 "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION,
4165 scsi_debug_version_date, scsi_debug_dev_size_mb,
4166 scsi_debug_opts);
4167 return sdebug_info;
4168}
4169
4170/* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */
4171static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer, int length)
4172{
4173 char arr[16];
4174 int opts;
4175 int minLen = length > 15 ? 15 : length;
4176
4177 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
4178 return -EACCES;
4179 memcpy(arr, buffer, minLen);
4180 arr[minLen] = '\0';
4181 if (1 != sscanf(arr, "%d", &opts))
4182 return -EINVAL;
4183 scsi_debug_opts = opts;
4184 if (scsi_debug_every_nth != 0)
4185 atomic_set(&sdebug_cmnd_count, 0);
4186 return length;
4187}
4188
4189/* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the
4190 * same for each scsi_debug host (if more than one). Some of the counters
4191 * output are not atomics so might be inaccurate in a busy system. */
4192static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
4193{
4194 int f, l;
4195 char b[32];
4196
4197 if (scsi_debug_every_nth > 0)
4198 snprintf(b, sizeof(b), " (curr:%d)",
4199 ((SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts) ?
4200 atomic_read(&sdebug_a_tsf) :
4201 atomic_read(&sdebug_cmnd_count)));
4202 else
4203 b[0] = '\0';
4204
4205 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n"
4206 "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, "
4207 "every_nth=%d%s\n"
4208 "delay=%d, ndelay=%d, max_luns=%d, q_completions=%d\n"
4209 "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n"
4210 "command aborts=%d; RESETs: device=%d, target=%d, bus=%d, "
4211 "host=%d\ndix_reads=%d dix_writes=%d dif_errors=%d "
4212 "usec_in_jiffy=%lu\n",
4213 SCSI_DEBUG_VERSION, scsi_debug_version_date,
4214 scsi_debug_num_tgts, scsi_debug_dev_size_mb, scsi_debug_opts,
4215 scsi_debug_every_nth, b, scsi_debug_delay, scsi_debug_ndelay,
4216 scsi_debug_max_luns, atomic_read(&sdebug_completions),
4217 scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads,
4218 sdebug_sectors_per, num_aborts, num_dev_resets,
4219 num_target_resets, num_bus_resets, num_host_resets,
4220 dix_reads, dix_writes, dif_errors, TICK_NSEC / 1000);
4221
4222 f = find_first_bit(queued_in_use_bm, scsi_debug_max_queue);
4223 if (f != scsi_debug_max_queue) {
4224 l = find_last_bit(queued_in_use_bm, scsi_debug_max_queue);
4225 seq_printf(m, " %s BUSY: first,last bits set: %d,%d\n",
4226 "queued_in_use_bm", f, l);
4227 }
4228 return 0;
4229}
4230
4231static ssize_t delay_show(struct device_driver *ddp, char *buf)
4232{
4233 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay);
4234}
4235/* Returns -EBUSY if delay is being changed and commands are queued */
4236static ssize_t delay_store(struct device_driver *ddp, const char *buf,
4237 size_t count)
4238{
4239 int delay, res;
4240
4241 if ((count > 0) && (1 == sscanf(buf, "%d", &delay))) {
4242 res = count;
4243 if (scsi_debug_delay != delay) {
4244 unsigned long iflags;
4245 int k;
4246
4247 spin_lock_irqsave(&queued_arr_lock, iflags);
4248 k = find_first_bit(queued_in_use_bm,
4249 scsi_debug_max_queue);
4250 if (k != scsi_debug_max_queue)
4251 res = -EBUSY; /* have queued commands */
4252 else {
4253 scsi_debug_delay = delay;
4254 scsi_debug_ndelay = 0;
4255 }
4256 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4257 }
4258 return res;
4259 }
4260 return -EINVAL;
4261}
4262static DRIVER_ATTR_RW(delay);
4263
4264static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
4265{
4266 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ndelay);
4267}
4268/* Returns -EBUSY if ndelay is being changed and commands are queued */
4269/* If > 0 and accepted then scsi_debug_delay is set to DELAY_OVERRIDDEN */
4270static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
4271 size_t count)
4272{
4273 unsigned long iflags;
4274 int ndelay, res, k;
4275
4276 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
4277 (ndelay >= 0) && (ndelay < 1000000000)) {
4278 res = count;
4279 if (scsi_debug_ndelay != ndelay) {
4280 spin_lock_irqsave(&queued_arr_lock, iflags);
4281 k = find_first_bit(queued_in_use_bm,
4282 scsi_debug_max_queue);
4283 if (k != scsi_debug_max_queue)
4284 res = -EBUSY; /* have queued commands */
4285 else {
4286 scsi_debug_ndelay = ndelay;
4287 scsi_debug_delay = ndelay ? DELAY_OVERRIDDEN
4288 : DEF_DELAY;
4289 }
4290 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4291 }
4292 return res;
4293 }
4294 return -EINVAL;
4295}
4296static DRIVER_ATTR_RW(ndelay);
4297
4298static ssize_t opts_show(struct device_driver *ddp, char *buf)
4299{
4300 return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts);
4301}
4302
4303static ssize_t opts_store(struct device_driver *ddp, const char *buf,
4304 size_t count)
4305{
4306 int opts;
4307 char work[20];
4308
4309 if (1 == sscanf(buf, "%10s", work)) {
4310 if (0 == strncasecmp(work,"0x", 2)) {
4311 if (1 == sscanf(&work[2], "%x", &opts))
4312 goto opts_done;
4313 } else {
4314 if (1 == sscanf(work, "%d", &opts))
4315 goto opts_done;
4316 }
4317 }
4318 return -EINVAL;
4319opts_done:
4320 scsi_debug_opts = opts;
4321 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
4322 sdebug_any_injecting_opt = true;
4323 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
4324 sdebug_any_injecting_opt = true;
4325 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
4326 sdebug_any_injecting_opt = true;
4327 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
4328 sdebug_any_injecting_opt = true;
4329 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
4330 sdebug_any_injecting_opt = true;
4331 atomic_set(&sdebug_cmnd_count, 0);
4332 atomic_set(&sdebug_a_tsf, 0);
4333 return count;
4334}
4335static DRIVER_ATTR_RW(opts);
4336
4337static ssize_t ptype_show(struct device_driver *ddp, char *buf)
4338{
4339 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype);
4340}
4341static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
4342 size_t count)
4343{
4344 int n;
4345
4346 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4347 scsi_debug_ptype = n;
4348 return count;
4349 }
4350 return -EINVAL;
4351}
4352static DRIVER_ATTR_RW(ptype);
4353
4354static ssize_t dsense_show(struct device_driver *ddp, char *buf)
4355{
4356 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense);
4357}
4358static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
4359 size_t count)
4360{
4361 int n;
4362
4363 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4364 scsi_debug_dsense = n;
4365 return count;
4366 }
4367 return -EINVAL;
4368}
4369static DRIVER_ATTR_RW(dsense);
4370
4371static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
4372{
4373 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw);
4374}
4375static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
4376 size_t count)
4377{
4378 int n;
4379
4380 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4381 n = (n > 0);
4382 scsi_debug_fake_rw = (scsi_debug_fake_rw > 0);
4383 if (scsi_debug_fake_rw != n) {
4384 if ((0 == n) && (NULL == fake_storep)) {
4385 unsigned long sz =
4386 (unsigned long)scsi_debug_dev_size_mb *
4387 1048576;
4388
4389 fake_storep = vmalloc(sz);
4390 if (NULL == fake_storep) {
4391 pr_err("out of memory, 9\n");
4392 return -ENOMEM;
4393 }
4394 memset(fake_storep, 0, sz);
4395 }
4396 scsi_debug_fake_rw = n;
4397 }
4398 return count;
4399 }
4400 return -EINVAL;
4401}
4402static DRIVER_ATTR_RW(fake_rw);
4403
4404static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
4405{
4406 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0);
4407}
4408static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
4409 size_t count)
4410{
4411 int n;
4412
4413 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4414 scsi_debug_no_lun_0 = n;
4415 return count;
4416 }
4417 return -EINVAL;
4418}
4419static DRIVER_ATTR_RW(no_lun_0);
4420
4421static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
4422{
4423 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts);
4424}
4425static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
4426 size_t count)
4427{
4428 int n;
4429
4430 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4431 scsi_debug_num_tgts = n;
4432 sdebug_max_tgts_luns();
4433 return count;
4434 }
4435 return -EINVAL;
4436}
4437static DRIVER_ATTR_RW(num_tgts);
4438
4439static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
4440{
4441 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb);
4442}
4443static DRIVER_ATTR_RO(dev_size_mb);
4444
4445static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
4446{
4447 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts);
4448}
4449static DRIVER_ATTR_RO(num_parts);
4450
4451static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
4452{
4453 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth);
4454}
4455static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
4456 size_t count)
4457{
4458 int nth;
4459
4460 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
4461 scsi_debug_every_nth = nth;
4462 atomic_set(&sdebug_cmnd_count, 0);
4463 return count;
4464 }
4465 return -EINVAL;
4466}
4467static DRIVER_ATTR_RW(every_nth);
4468
4469static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
4470{
4471 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns);
4472}
4473static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
4474 size_t count)
4475{
4476 int n;
4477 bool changed;
4478
4479 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4480 changed = (scsi_debug_max_luns != n);
4481 scsi_debug_max_luns = n;
4482 sdebug_max_tgts_luns();
4483 if (changed && (scsi_debug_scsi_level >= 5)) { /* >= SPC-3 */
4484 struct sdebug_host_info *sdhp;
4485 struct sdebug_dev_info *dp;
4486
4487 spin_lock(&sdebug_host_list_lock);
4488 list_for_each_entry(sdhp, &sdebug_host_list,
4489 host_list) {
4490 list_for_each_entry(dp, &sdhp->dev_info_list,
4491 dev_list) {
4492 set_bit(SDEBUG_UA_LUNS_CHANGED,
4493 dp->uas_bm);
4494 }
4495 }
4496 spin_unlock(&sdebug_host_list_lock);
4497 }
4498 return count;
4499 }
4500 return -EINVAL;
4501}
4502static DRIVER_ATTR_RW(max_luns);
4503
4504static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
4505{
4506 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_queue);
4507}
4508/* N.B. max_queue can be changed while there are queued commands. In flight
4509 * commands beyond the new max_queue will be completed. */
4510static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
4511 size_t count)
4512{
4513 unsigned long iflags;
4514 int n, k;
4515
4516 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
4517 (n <= SCSI_DEBUG_CANQUEUE)) {
4518 spin_lock_irqsave(&queued_arr_lock, iflags);
4519 k = find_last_bit(queued_in_use_bm, SCSI_DEBUG_CANQUEUE);
4520 scsi_debug_max_queue = n;
4521 if (SCSI_DEBUG_CANQUEUE == k)
4522 atomic_set(&retired_max_queue, 0);
4523 else if (k >= n)
4524 atomic_set(&retired_max_queue, k + 1);
4525 else
4526 atomic_set(&retired_max_queue, 0);
4527 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4528 return count;
4529 }
4530 return -EINVAL;
4531}
4532static DRIVER_ATTR_RW(max_queue);
4533
4534static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
4535{
4536 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_uld);
4537}
4538static DRIVER_ATTR_RO(no_uld);
4539
4540static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
4541{
4542 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level);
4543}
4544static DRIVER_ATTR_RO(scsi_level);
4545
4546static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
4547{
4548 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb);
4549}
4550static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
4551 size_t count)
4552{
4553 int n;
4554 bool changed;
4555
4556 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4557 changed = (scsi_debug_virtual_gb != n);
4558 scsi_debug_virtual_gb = n;
4559 sdebug_capacity = get_sdebug_capacity();
4560 if (changed) {
4561 struct sdebug_host_info *sdhp;
4562 struct sdebug_dev_info *dp;
4563
4564 spin_lock(&sdebug_host_list_lock);
4565 list_for_each_entry(sdhp, &sdebug_host_list,
4566 host_list) {
4567 list_for_each_entry(dp, &sdhp->dev_info_list,
4568 dev_list) {
4569 set_bit(SDEBUG_UA_CAPACITY_CHANGED,
4570 dp->uas_bm);
4571 }
4572 }
4573 spin_unlock(&sdebug_host_list_lock);
4574 }
4575 return count;
4576 }
4577 return -EINVAL;
4578}
4579static DRIVER_ATTR_RW(virtual_gb);
4580
4581static ssize_t add_host_show(struct device_driver *ddp, char *buf)
4582{
4583 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host);
4584}
4585
4586static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
4587 size_t count)
4588{
4589 int delta_hosts;
4590
4591 if (sscanf(buf, "%d", &delta_hosts) != 1)
4592 return -EINVAL;
4593 if (delta_hosts > 0) {
4594 do {
4595 sdebug_add_adapter();
4596 } while (--delta_hosts);
4597 } else if (delta_hosts < 0) {
4598 do {
4599 sdebug_remove_adapter();
4600 } while (++delta_hosts);
4601 }
4602 return count;
4603}
4604static DRIVER_ATTR_RW(add_host);
4605
4606static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
4607{
4608 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_vpd_use_hostno);
4609}
4610static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
4611 size_t count)
4612{
4613 int n;
4614
4615 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4616 scsi_debug_vpd_use_hostno = n;
4617 return count;
4618 }
4619 return -EINVAL;
4620}
4621static DRIVER_ATTR_RW(vpd_use_hostno);
4622
4623static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
4624{
4625 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size);
4626}
4627static DRIVER_ATTR_RO(sector_size);
4628
4629static ssize_t dix_show(struct device_driver *ddp, char *buf)
4630{
4631 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix);
4632}
4633static DRIVER_ATTR_RO(dix);
4634
4635static ssize_t dif_show(struct device_driver *ddp, char *buf)
4636{
4637 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif);
4638}
4639static DRIVER_ATTR_RO(dif);
4640
4641static ssize_t guard_show(struct device_driver *ddp, char *buf)
4642{
4643 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_guard);
4644}
4645static DRIVER_ATTR_RO(guard);
4646
4647static ssize_t ato_show(struct device_driver *ddp, char *buf)
4648{
4649 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato);
4650}
4651static DRIVER_ATTR_RO(ato);
4652
4653static ssize_t map_show(struct device_driver *ddp, char *buf)
4654{
4655 ssize_t count;
4656
4657 if (!scsi_debug_lbp())
4658 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
4659 sdebug_store_sectors);
4660
4661 count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
4662 (int)map_size, map_storep);
4663 buf[count++] = '\n';
4664 buf[count] = '\0';
4665
4666 return count;
4667}
4668static DRIVER_ATTR_RO(map);
4669
4670static ssize_t removable_show(struct device_driver *ddp, char *buf)
4671{
4672 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_removable ? 1 : 0);
4673}
4674static ssize_t removable_store(struct device_driver *ddp, const char *buf,
4675 size_t count)
4676{
4677 int n;
4678
4679 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4680 scsi_debug_removable = (n > 0);
4681 return count;
4682 }
4683 return -EINVAL;
4684}
4685static DRIVER_ATTR_RW(removable);
4686
4687static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
4688{
4689 return scnprintf(buf, PAGE_SIZE, "%d\n", !!scsi_debug_host_lock);
4690}
4691/* Returns -EBUSY if host_lock is being changed and commands are queued */
4692static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
4693 size_t count)
4694{
4695 int n, res;
4696
4697 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4698 bool new_host_lock = (n > 0);
4699
4700 res = count;
4701 if (new_host_lock != scsi_debug_host_lock) {
4702 unsigned long iflags;
4703 int k;
4704
4705 spin_lock_irqsave(&queued_arr_lock, iflags);
4706 k = find_first_bit(queued_in_use_bm,
4707 scsi_debug_max_queue);
4708 if (k != scsi_debug_max_queue)
4709 res = -EBUSY; /* have queued commands */
4710 else
4711 scsi_debug_host_lock = new_host_lock;
4712 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4713 }
4714 return res;
4715 }
4716 return -EINVAL;
4717}
4718static DRIVER_ATTR_RW(host_lock);
4719
4720static ssize_t strict_show(struct device_driver *ddp, char *buf)
4721{
4722 return scnprintf(buf, PAGE_SIZE, "%d\n", !!scsi_debug_strict);
4723}
4724static ssize_t strict_store(struct device_driver *ddp, const char *buf,
4725 size_t count)
4726{
4727 int n;
4728
4729 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4730 scsi_debug_strict = (n > 0);
4731 return count;
4732 }
4733 return -EINVAL;
4734}
4735static DRIVER_ATTR_RW(strict);
4736
4737
4738/* Note: The following array creates attribute files in the
4739 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
4740 files (over those found in the /sys/module/scsi_debug/parameters
4741 directory) is that auxiliary actions can be triggered when an attribute
4742 is changed. For example see: sdebug_add_host_store() above.
4743 */
4744
4745static struct attribute *sdebug_drv_attrs[] = {
4746 &driver_attr_delay.attr,
4747 &driver_attr_opts.attr,
4748 &driver_attr_ptype.attr,
4749 &driver_attr_dsense.attr,
4750 &driver_attr_fake_rw.attr,
4751 &driver_attr_no_lun_0.attr,
4752 &driver_attr_num_tgts.attr,
4753 &driver_attr_dev_size_mb.attr,
4754 &driver_attr_num_parts.attr,
4755 &driver_attr_every_nth.attr,
4756 &driver_attr_max_luns.attr,
4757 &driver_attr_max_queue.attr,
4758 &driver_attr_no_uld.attr,
4759 &driver_attr_scsi_level.attr,
4760 &driver_attr_virtual_gb.attr,
4761 &driver_attr_add_host.attr,
4762 &driver_attr_vpd_use_hostno.attr,
4763 &driver_attr_sector_size.attr,
4764 &driver_attr_dix.attr,
4765 &driver_attr_dif.attr,
4766 &driver_attr_guard.attr,
4767 &driver_attr_ato.attr,
4768 &driver_attr_map.attr,
4769 &driver_attr_removable.attr,
4770 &driver_attr_host_lock.attr,
4771 &driver_attr_ndelay.attr,
4772 &driver_attr_strict.attr,
4773 NULL,
4774};
4775ATTRIBUTE_GROUPS(sdebug_drv);
4776
4777static struct device *pseudo_primary;
4778
4779static int __init scsi_debug_init(void)
4780{
4781 unsigned long sz;
4782 int host_to_add;
4783 int k;
4784 int ret;
4785
4786 atomic_set(&sdebug_cmnd_count, 0);
4787 atomic_set(&sdebug_completions, 0);
4788 atomic_set(&retired_max_queue, 0);
4789
4790 if (scsi_debug_ndelay >= 1000000000) {
4791 pr_warn("ndelay must be less than 1 second, ignored\n");
4792 scsi_debug_ndelay = 0;
4793 } else if (scsi_debug_ndelay > 0)
4794 scsi_debug_delay = DELAY_OVERRIDDEN;
4795
4796 switch (scsi_debug_sector_size) {
4797 case 512:
4798 case 1024:
4799 case 2048:
4800 case 4096:
4801 break;
4802 default:
4803 pr_err("invalid sector_size %d\n", scsi_debug_sector_size);
4804 return -EINVAL;
4805 }
4806
4807 switch (scsi_debug_dif) {
4808
4809 case SD_DIF_TYPE0_PROTECTION:
4810 case SD_DIF_TYPE1_PROTECTION:
4811 case SD_DIF_TYPE2_PROTECTION:
4812 case SD_DIF_TYPE3_PROTECTION:
4813 break;
4814
4815 default:
4816 pr_err("dif must be 0, 1, 2 or 3\n");
4817 return -EINVAL;
4818 }
4819
4820 if (scsi_debug_guard > 1) {
4821 pr_err("guard must be 0 or 1\n");
4822 return -EINVAL;
4823 }
4824
4825 if (scsi_debug_ato > 1) {
4826 pr_err("ato must be 0 or 1\n");
4827 return -EINVAL;
4828 }
4829
4830 if (scsi_debug_physblk_exp > 15) {
4831 pr_err("invalid physblk_exp %u\n", scsi_debug_physblk_exp);
4832 return -EINVAL;
4833 }
4834
4835 if (scsi_debug_lowest_aligned > 0x3fff) {
4836 pr_err("lowest_aligned too big: %u\n",
4837 scsi_debug_lowest_aligned);
4838 return -EINVAL;
4839 }
4840
4841 if (scsi_debug_dev_size_mb < 1)
4842 scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
4843 sz = (unsigned long)scsi_debug_dev_size_mb * 1048576;
4844 sdebug_store_sectors = sz / scsi_debug_sector_size;
4845 sdebug_capacity = get_sdebug_capacity();
4846
4847 /* play around with geometry, don't waste too much on track 0 */
4848 sdebug_heads = 8;
4849 sdebug_sectors_per = 32;
4850 if (scsi_debug_dev_size_mb >= 256)
4851 sdebug_heads = 64;
4852 else if (scsi_debug_dev_size_mb >= 16)
4853 sdebug_heads = 32;
4854 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
4855 (sdebug_sectors_per * sdebug_heads);
4856 if (sdebug_cylinders_per >= 1024) {
4857 /* other LLDs do this; implies >= 1GB ram disk ... */
4858 sdebug_heads = 255;
4859 sdebug_sectors_per = 63;
4860 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
4861 (sdebug_sectors_per * sdebug_heads);
4862 }
4863
4864 if (0 == scsi_debug_fake_rw) {
4865 fake_storep = vmalloc(sz);
4866 if (NULL == fake_storep) {
4867 pr_err("out of memory, 1\n");
4868 return -ENOMEM;
4869 }
4870 memset(fake_storep, 0, sz);
4871 if (scsi_debug_num_parts > 0)
4872 sdebug_build_parts(fake_storep, sz);
4873 }
4874
4875 if (scsi_debug_dix) {
4876 int dif_size;
4877
4878 dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple);
4879 dif_storep = vmalloc(dif_size);
4880
4881 pr_err("dif_storep %u bytes @ %p\n", dif_size, dif_storep);
4882
4883 if (dif_storep == NULL) {
4884 pr_err("out of mem. (DIX)\n");
4885 ret = -ENOMEM;
4886 goto free_vm;
4887 }
4888
4889 memset(dif_storep, 0xff, dif_size);
4890 }
4891
4892 /* Logical Block Provisioning */
4893 if (scsi_debug_lbp()) {
4894 scsi_debug_unmap_max_blocks =
4895 clamp(scsi_debug_unmap_max_blocks, 0U, 0xffffffffU);
4896
4897 scsi_debug_unmap_max_desc =
4898 clamp(scsi_debug_unmap_max_desc, 0U, 256U);
4899
4900 scsi_debug_unmap_granularity =
4901 clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU);
4902
4903 if (scsi_debug_unmap_alignment &&
4904 scsi_debug_unmap_granularity <=
4905 scsi_debug_unmap_alignment) {
4906 pr_err("ERR: unmap_granularity <= unmap_alignment\n");
4907 return -EINVAL;
4908 }
4909
4910 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
4911 map_storep = vmalloc(BITS_TO_LONGS(map_size) * sizeof(long));
4912
4913 pr_info("%lu provisioning blocks\n", map_size);
4914
4915 if (map_storep == NULL) {
4916 pr_err("out of mem. (MAP)\n");
4917 ret = -ENOMEM;
4918 goto free_vm;
4919 }
4920
4921 bitmap_zero(map_storep, map_size);
4922
4923 /* Map first 1KB for partition table */
4924 if (scsi_debug_num_parts)
4925 map_region(0, 2);
4926 }
4927
4928 pseudo_primary = root_device_register("pseudo_0");
4929 if (IS_ERR(pseudo_primary)) {
4930 pr_warn("root_device_register() error\n");
4931 ret = PTR_ERR(pseudo_primary);
4932 goto free_vm;
4933 }
4934 ret = bus_register(&pseudo_lld_bus);
4935 if (ret < 0) {
4936 pr_warn("bus_register error: %d\n", ret);
4937 goto dev_unreg;
4938 }
4939 ret = driver_register(&sdebug_driverfs_driver);
4940 if (ret < 0) {
4941 pr_warn("driver_register error: %d\n", ret);
4942 goto bus_unreg;
4943 }
4944
4945 host_to_add = scsi_debug_add_host;
4946 scsi_debug_add_host = 0;
4947
4948 for (k = 0; k < host_to_add; k++) {
4949 if (sdebug_add_adapter()) {
4950 pr_err("sdebug_add_adapter failed k=%d\n", k);
4951 break;
4952 }
4953 }
4954
4955 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
4956 pr_info("built %d host(s)\n", scsi_debug_add_host);
4957
4958 return 0;
4959
4960bus_unreg:
4961 bus_unregister(&pseudo_lld_bus);
4962dev_unreg:
4963 root_device_unregister(pseudo_primary);
4964free_vm:
4965 vfree(map_storep);
4966 vfree(dif_storep);
4967 vfree(fake_storep);
4968
4969 return ret;
4970}
4971
4972static void __exit scsi_debug_exit(void)
4973{
4974 int k = scsi_debug_add_host;
4975
4976 stop_all_queued();
4977 free_all_queued();
4978 for (; k; k--)
4979 sdebug_remove_adapter();
4980 driver_unregister(&sdebug_driverfs_driver);
4981 bus_unregister(&pseudo_lld_bus);
4982 root_device_unregister(pseudo_primary);
4983
4984 vfree(dif_storep);
4985 vfree(fake_storep);
4986}
4987
4988device_initcall(scsi_debug_init);
4989module_exit(scsi_debug_exit);
4990
4991static void sdebug_release_adapter(struct device * dev)
4992{
4993 struct sdebug_host_info *sdbg_host;
4994
4995 sdbg_host = to_sdebug_host(dev);
4996 kfree(sdbg_host);
4997}
4998
4999static int sdebug_add_adapter(void)
5000{
5001 int k, devs_per_host;
5002 int error = 0;
5003 struct sdebug_host_info *sdbg_host;
5004 struct sdebug_dev_info *sdbg_devinfo, *tmp;
5005
5006 sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL);
5007 if (NULL == sdbg_host) {
5008 pr_err("out of memory at line %d\n", __LINE__);
5009 return -ENOMEM;
5010 }
5011
5012 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
5013
5014 devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns;
5015 for (k = 0; k < devs_per_host; k++) {
5016 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
5017 if (!sdbg_devinfo) {
5018 pr_err("out of memory at line %d\n", __LINE__);
5019 error = -ENOMEM;
5020 goto clean;
5021 }
5022 }
5023
5024 spin_lock(&sdebug_host_list_lock);
5025 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
5026 spin_unlock(&sdebug_host_list_lock);
5027
5028 sdbg_host->dev.bus = &pseudo_lld_bus;
5029 sdbg_host->dev.parent = pseudo_primary;
5030 sdbg_host->dev.release = &sdebug_release_adapter;
5031 dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host);
5032
5033 error = device_register(&sdbg_host->dev);
5034
5035 if (error)
5036 goto clean;
5037
5038 ++scsi_debug_add_host;
5039 return error;
5040
5041clean:
5042 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
5043 dev_list) {
5044 list_del(&sdbg_devinfo->dev_list);
5045 kfree(sdbg_devinfo);
5046 }
5047
5048 kfree(sdbg_host);
5049 return error;
5050}
5051
5052static void sdebug_remove_adapter(void)
5053{
5054 struct sdebug_host_info * sdbg_host = NULL;
5055
5056 spin_lock(&sdebug_host_list_lock);
5057 if (!list_empty(&sdebug_host_list)) {
5058 sdbg_host = list_entry(sdebug_host_list.prev,
5059 struct sdebug_host_info, host_list);
5060 list_del(&sdbg_host->host_list);
5061 }
5062 spin_unlock(&sdebug_host_list_lock);
5063
5064 if (!sdbg_host)
5065 return;
5066
5067 device_unregister(&sdbg_host->dev);
5068 --scsi_debug_add_host;
5069}
5070
5071static int
5072sdebug_change_qdepth(struct scsi_device *sdev, int qdepth)
5073{
5074 int num_in_q = 0;
5075 unsigned long iflags;
5076 struct sdebug_dev_info *devip;
5077
5078 spin_lock_irqsave(&queued_arr_lock, iflags);
5079 devip = (struct sdebug_dev_info *)sdev->hostdata;
5080 if (NULL == devip) {
5081 spin_unlock_irqrestore(&queued_arr_lock, iflags);
5082 return -ENODEV;
5083 }
5084 num_in_q = atomic_read(&devip->num_in_q);
5085 spin_unlock_irqrestore(&queued_arr_lock, iflags);
5086
5087 if (qdepth < 1)
5088 qdepth = 1;
5089 /* allow to exceed max host queued_arr elements for testing */
5090 if (qdepth > SCSI_DEBUG_CANQUEUE + 10)
5091 qdepth = SCSI_DEBUG_CANQUEUE + 10;
5092 scsi_change_queue_depth(sdev, qdepth);
5093
5094 if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) {
5095 sdev_printk(KERN_INFO, sdev,
5096 "%s: qdepth=%d, num_in_q=%d\n",
5097 __func__, qdepth, num_in_q);
5098 }
5099 return sdev->queue_depth;
5100}
5101
5102static int
5103check_inject(struct scsi_cmnd *scp)
5104{
5105 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
5106
5107 memset(ep, 0, sizeof(struct sdebug_scmd_extra_t));
5108
5109 if (atomic_inc_return(&sdebug_cmnd_count) >=
5110 abs(scsi_debug_every_nth)) {
5111 atomic_set(&sdebug_cmnd_count, 0);
5112 if (scsi_debug_every_nth < -1)
5113 scsi_debug_every_nth = -1;
5114 if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts)
5115 return 1; /* ignore command causing timeout */
5116 else if (SCSI_DEBUG_OPT_MAC_TIMEOUT & scsi_debug_opts &&
5117 scsi_medium_access_command(scp))
5118 return 1; /* time out reads and writes */
5119 if (sdebug_any_injecting_opt) {
5120 int opts = scsi_debug_opts;
5121
5122 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
5123 ep->inj_recovered = true;
5124 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
5125 ep->inj_transport = true;
5126 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
5127 ep->inj_dif = true;
5128 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
5129 ep->inj_dix = true;
5130 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
5131 ep->inj_short = true;
5132 }
5133 }
5134 return 0;
5135}
5136
5137static int
5138scsi_debug_queuecommand(struct scsi_cmnd *scp)
5139{
5140 u8 sdeb_i;
5141 struct scsi_device *sdp = scp->device;
5142 const struct opcode_info_t *oip;
5143 const struct opcode_info_t *r_oip;
5144 struct sdebug_dev_info *devip;
5145 u8 *cmd = scp->cmnd;
5146 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
5147 int k, na;
5148 int errsts = 0;
5149 int errsts_no_connect = DID_NO_CONNECT << 16;
5150 u32 flags;
5151 u16 sa;
5152 u8 opcode = cmd[0];
5153 bool has_wlun_rl;
5154 bool debug = !!(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts);
5155
5156 scsi_set_resid(scp, 0);
5157 if (debug && !(SCSI_DEBUG_OPT_NO_CDB_NOISE & scsi_debug_opts)) {
5158 char b[120];
5159 int n, len, sb;
5160
5161 len = scp->cmd_len;
5162 sb = (int)sizeof(b);
5163 if (len > 32)
5164 strcpy(b, "too long, over 32 bytes");
5165 else {
5166 for (k = 0, n = 0; k < len && n < sb; ++k)
5167 n += scnprintf(b + n, sb - n, "%02x ",
5168 (u32)cmd[k]);
5169 }
5170 sdev_printk(KERN_INFO, sdp, "%s: cmd %s\n", my_name, b);
5171 }
5172 has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS);
5173 if ((sdp->lun >= scsi_debug_max_luns) && !has_wlun_rl)
5174 return schedule_resp(scp, NULL, errsts_no_connect, 0);
5175
5176 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */
5177 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */
5178 devip = (struct sdebug_dev_info *)sdp->hostdata;
5179 if (!devip) {
5180 devip = devInfoReg(sdp);
5181 if (NULL == devip)
5182 return schedule_resp(scp, NULL, errsts_no_connect, 0);
5183 }
5184 na = oip->num_attached;
5185 r_pfp = oip->pfp;
5186 if (na) { /* multiple commands with this opcode */
5187 r_oip = oip;
5188 if (FF_SA & r_oip->flags) {
5189 if (F_SA_LOW & oip->flags)
5190 sa = 0x1f & cmd[1];
5191 else
5192 sa = get_unaligned_be16(cmd + 8);
5193 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5194 if (opcode == oip->opcode && sa == oip->sa)
5195 break;
5196 }
5197 } else { /* since no service action only check opcode */
5198 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5199 if (opcode == oip->opcode)
5200 break;
5201 }
5202 }
5203 if (k > na) {
5204 if (F_SA_LOW & r_oip->flags)
5205 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4);
5206 else if (F_SA_HIGH & r_oip->flags)
5207 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7);
5208 else
5209 mk_sense_invalid_opcode(scp);
5210 goto check_cond;
5211 }
5212 } /* else (when na==0) we assume the oip is a match */
5213 flags = oip->flags;
5214 if (F_INV_OP & flags) {
5215 mk_sense_invalid_opcode(scp);
5216 goto check_cond;
5217 }
5218 if (has_wlun_rl && !(F_RL_WLUN_OK & flags)) {
5219 if (debug)
5220 sdev_printk(KERN_INFO, sdp, "scsi_debug: Opcode: "
5221 "0x%x not supported for wlun\n", opcode);
5222 mk_sense_invalid_opcode(scp);
5223 goto check_cond;
5224 }
5225 if (scsi_debug_strict) { /* check cdb against mask */
5226 u8 rem;
5227 int j;
5228
5229 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) {
5230 rem = ~oip->len_mask[k] & cmd[k];
5231 if (rem) {
5232 for (j = 7; j >= 0; --j, rem <<= 1) {
5233 if (0x80 & rem)
5234 break;
5235 }
5236 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j);
5237 goto check_cond;
5238 }
5239 }
5240 }
5241 if (!(F_SKIP_UA & flags) &&
5242 SDEBUG_NUM_UAS != find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS)) {
5243 errsts = check_readiness(scp, UAS_ONLY, devip);
5244 if (errsts)
5245 goto check_cond;
5246 }
5247 if ((F_M_ACCESS & flags) && devip->stopped) {
5248 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2);
5249 if (debug)
5250 sdev_printk(KERN_INFO, sdp, "%s reports: Not ready: "
5251 "%s\n", my_name, "initializing command "
5252 "required");
5253 errsts = check_condition_result;
5254 goto fini;
5255 }
5256 if (scsi_debug_fake_rw && (F_FAKE_RW & flags))
5257 goto fini;
5258 if (scsi_debug_every_nth) {
5259 if (check_inject(scp))
5260 return 0; /* ignore command: make trouble */
5261 }
5262 if (oip->pfp) /* if this command has a resp_* function, call it */
5263 errsts = oip->pfp(scp, devip);
5264 else if (r_pfp) /* if leaf function ptr NULL, try the root's */
5265 errsts = r_pfp(scp, devip);
5266
5267fini:
5268 return schedule_resp(scp, devip, errsts,
5269 ((F_DELAY_OVERR & flags) ? 0 : scsi_debug_delay));
5270check_cond:
5271 return schedule_resp(scp, devip, check_condition_result, 0);
5272}
5273
5274static int
5275sdebug_queuecommand_lock_or_not(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
5276{
5277 if (scsi_debug_host_lock) {
5278 unsigned long iflags;
5279 int rc;
5280
5281 spin_lock_irqsave(shost->host_lock, iflags);
5282 rc = scsi_debug_queuecommand(cmd);
5283 spin_unlock_irqrestore(shost->host_lock, iflags);
5284 return rc;
5285 } else
5286 return scsi_debug_queuecommand(cmd);
5287}
5288
5289static struct scsi_host_template sdebug_driver_template = {
5290 .show_info = scsi_debug_show_info,
5291 .write_info = scsi_debug_write_info,
5292 .proc_name = sdebug_proc_name,
5293 .name = "SCSI DEBUG",
5294 .info = scsi_debug_info,
5295 .slave_alloc = scsi_debug_slave_alloc,
5296 .slave_configure = scsi_debug_slave_configure,
5297 .slave_destroy = scsi_debug_slave_destroy,
5298 .ioctl = scsi_debug_ioctl,
5299 .queuecommand = sdebug_queuecommand_lock_or_not,
5300 .change_queue_depth = sdebug_change_qdepth,
5301 .eh_abort_handler = scsi_debug_abort,
5302 .eh_device_reset_handler = scsi_debug_device_reset,
5303 .eh_target_reset_handler = scsi_debug_target_reset,
5304 .eh_bus_reset_handler = scsi_debug_bus_reset,
5305 .eh_host_reset_handler = scsi_debug_host_reset,
5306 .can_queue = SCSI_DEBUG_CANQUEUE,
5307 .this_id = 7,
5308 .sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS,
5309 .cmd_per_lun = DEF_CMD_PER_LUN,
5310 .max_sectors = -1U,
5311 .use_clustering = DISABLE_CLUSTERING,
5312 .module = THIS_MODULE,
5313 .track_queue_depth = 1,
5314 .cmd_size = sizeof(struct sdebug_scmd_extra_t),
5315};
5316
5317static int sdebug_driver_probe(struct device * dev)
5318{
5319 int error = 0;
5320 int opts;
5321 struct sdebug_host_info *sdbg_host;
5322 struct Scsi_Host *hpnt;
5323 int host_prot;
5324
5325 sdbg_host = to_sdebug_host(dev);
5326
5327 sdebug_driver_template.can_queue = scsi_debug_max_queue;
5328 if (scsi_debug_clustering)
5329 sdebug_driver_template.use_clustering = ENABLE_CLUSTERING;
5330 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
5331 if (NULL == hpnt) {
5332 pr_err("scsi_host_alloc failed\n");
5333 error = -ENODEV;
5334 return error;
5335 }
5336
5337 sdbg_host->shost = hpnt;
5338 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
5339 if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id))
5340 hpnt->max_id = scsi_debug_num_tgts + 1;
5341 else
5342 hpnt->max_id = scsi_debug_num_tgts;
5343 /* = scsi_debug_max_luns; */
5344 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
5345
5346 host_prot = 0;
5347
5348 switch (scsi_debug_dif) {
5349
5350 case SD_DIF_TYPE1_PROTECTION:
5351 host_prot = SHOST_DIF_TYPE1_PROTECTION;
5352 if (scsi_debug_dix)
5353 host_prot |= SHOST_DIX_TYPE1_PROTECTION;
5354 break;
5355
5356 case SD_DIF_TYPE2_PROTECTION:
5357 host_prot = SHOST_DIF_TYPE2_PROTECTION;
5358 if (scsi_debug_dix)
5359 host_prot |= SHOST_DIX_TYPE2_PROTECTION;
5360 break;
5361
5362 case SD_DIF_TYPE3_PROTECTION:
5363 host_prot = SHOST_DIF_TYPE3_PROTECTION;
5364 if (scsi_debug_dix)
5365 host_prot |= SHOST_DIX_TYPE3_PROTECTION;
5366 break;
5367
5368 default:
5369 if (scsi_debug_dix)
5370 host_prot |= SHOST_DIX_TYPE0_PROTECTION;
5371 break;
5372 }
5373
5374 scsi_host_set_prot(hpnt, host_prot);
5375
5376 pr_info("host protection%s%s%s%s%s%s%s\n",
5377 (host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
5378 (host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
5379 (host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
5380 (host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
5381 (host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
5382 (host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
5383 (host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
5384
5385 if (scsi_debug_guard == 1)
5386 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
5387 else
5388 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
5389
5390 opts = scsi_debug_opts;
5391 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
5392 sdebug_any_injecting_opt = true;
5393 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
5394 sdebug_any_injecting_opt = true;
5395 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
5396 sdebug_any_injecting_opt = true;
5397 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
5398 sdebug_any_injecting_opt = true;
5399 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
5400 sdebug_any_injecting_opt = true;
5401
5402 error = scsi_add_host(hpnt, &sdbg_host->dev);
5403 if (error) {
5404 pr_err("scsi_add_host failed\n");
5405 error = -ENODEV;
5406 scsi_host_put(hpnt);
5407 } else
5408 scsi_scan_host(hpnt);
5409
5410 return error;
5411}
5412
5413static int sdebug_driver_remove(struct device * dev)
5414{
5415 struct sdebug_host_info *sdbg_host;
5416 struct sdebug_dev_info *sdbg_devinfo, *tmp;
5417
5418 sdbg_host = to_sdebug_host(dev);
5419
5420 if (!sdbg_host) {
5421 pr_err("Unable to locate host info\n");
5422 return -ENODEV;
5423 }
5424
5425 scsi_remove_host(sdbg_host->shost);
5426
5427 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
5428 dev_list) {
5429 list_del(&sdbg_devinfo->dev_list);
5430 kfree(sdbg_devinfo);
5431 }
5432
5433 scsi_host_put(sdbg_host->shost);
5434 return 0;
5435}
5436
5437static int pseudo_lld_bus_match(struct device *dev,
5438 struct device_driver *dev_driver)
5439{
5440 return 1;
5441}
5442
5443static struct bus_type pseudo_lld_bus = {
5444 .name = "pseudo",
5445 .match = pseudo_lld_bus_match,
5446 .probe = sdebug_driver_probe,
5447 .remove = sdebug_driver_remove,
5448 .drv_groups = sdebug_drv_groups,
5449};