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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#include <linux/module.h>
29
30#include <linux/kernel.h>
31#include <linux/errno.h>
32#include <linux/timer.h>
33#include <linux/slab.h>
34#include <linux/types.h>
35#include <linux/string.h>
36#include <linux/genhd.h>
37#include <linux/fs.h>
38#include <linux/init.h>
39#include <linux/proc_fs.h>
40#include <linux/vmalloc.h>
41#include <linux/moduleparam.h>
42#include <linux/scatterlist.h>
43#include <linux/blkdev.h>
44#include <linux/crc-t10dif.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_dbg.h>
57
58#include "sd.h"
59#include "scsi_logging.h"
60
61#define SCSI_DEBUG_VERSION "1.82"
62static const char * scsi_debug_version_date = "20100324";
63
64/* Additional Sense Code (ASC) */
65#define NO_ADDITIONAL_SENSE 0x0
66#define LOGICAL_UNIT_NOT_READY 0x4
67#define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
68#define UNRECOVERED_READ_ERR 0x11
69#define PARAMETER_LIST_LENGTH_ERR 0x1a
70#define INVALID_OPCODE 0x20
71#define ADDR_OUT_OF_RANGE 0x21
72#define INVALID_COMMAND_OPCODE 0x20
73#define INVALID_FIELD_IN_CDB 0x24
74#define INVALID_FIELD_IN_PARAM_LIST 0x26
75#define POWERON_RESET 0x29
76#define SAVING_PARAMS_UNSUP 0x39
77#define TRANSPORT_PROBLEM 0x4b
78#define THRESHOLD_EXCEEDED 0x5d
79#define LOW_POWER_COND_ON 0x5e
80
81/* Additional Sense Code Qualifier (ASCQ) */
82#define ACK_NAK_TO 0x3
83
84#define SDEBUG_TAGGED_QUEUING 0 /* 0 | MSG_SIMPLE_TAG | MSG_ORDERED_TAG */
85
86/* Default values for driver parameters */
87#define DEF_NUM_HOST 1
88#define DEF_NUM_TGTS 1
89#define DEF_MAX_LUNS 1
90/* With these defaults, this driver will make 1 host with 1 target
91 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
92 */
93#define DEF_ATO 1
94#define DEF_DELAY 1
95#define DEF_DEV_SIZE_MB 8
96#define DEF_DIF 0
97#define DEF_DIX 0
98#define DEF_D_SENSE 0
99#define DEF_EVERY_NTH 0
100#define DEF_FAKE_RW 0
101#define DEF_GUARD 0
102#define DEF_LBPU 0
103#define DEF_LBPWS 0
104#define DEF_LBPWS10 0
105#define DEF_LBPRZ 1
106#define DEF_LOWEST_ALIGNED 0
107#define DEF_NO_LUN_0 0
108#define DEF_NUM_PARTS 0
109#define DEF_OPTS 0
110#define DEF_OPT_BLKS 64
111#define DEF_PHYSBLK_EXP 0
112#define DEF_PTYPE 0
113#define DEF_REMOVABLE false
114#define DEF_SCSI_LEVEL 5 /* INQUIRY, byte2 [5->SPC-3] */
115#define DEF_SECTOR_SIZE 512
116#define DEF_UNMAP_ALIGNMENT 0
117#define DEF_UNMAP_GRANULARITY 1
118#define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
119#define DEF_UNMAP_MAX_DESC 256
120#define DEF_VIRTUAL_GB 0
121#define DEF_VPD_USE_HOSTNO 1
122#define DEF_WRITESAME_LENGTH 0xFFFF
123
124/* bit mask values for scsi_debug_opts */
125#define SCSI_DEBUG_OPT_NOISE 1
126#define SCSI_DEBUG_OPT_MEDIUM_ERR 2
127#define SCSI_DEBUG_OPT_TIMEOUT 4
128#define SCSI_DEBUG_OPT_RECOVERED_ERR 8
129#define SCSI_DEBUG_OPT_TRANSPORT_ERR 16
130#define SCSI_DEBUG_OPT_DIF_ERR 32
131#define SCSI_DEBUG_OPT_DIX_ERR 64
132#define SCSI_DEBUG_OPT_MAC_TIMEOUT 128
133/* When "every_nth" > 0 then modulo "every_nth" commands:
134 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
135 * - a RECOVERED_ERROR is simulated on successful read and write
136 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
137 * - a TRANSPORT_ERROR is simulated on successful read and write
138 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
139 *
140 * When "every_nth" < 0 then after "- every_nth" commands:
141 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
142 * - a RECOVERED_ERROR is simulated on successful read and write
143 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
144 * - a TRANSPORT_ERROR is simulated on successful read and write
145 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
146 * This will continue until some other action occurs (e.g. the user
147 * writing a new value (other than -1 or 1) to every_nth via sysfs).
148 */
149
150/* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
151 * sector on read commands: */
152#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
153#define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
154
155/* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
156 * or "peripheral device" addressing (value 0) */
157#define SAM2_LUN_ADDRESS_METHOD 0
158#define SAM2_WLUN_REPORT_LUNS 0xc101
159
160/* Can queue up to this number of commands. Typically commands that
161 * that have a non-zero delay are queued. */
162#define SCSI_DEBUG_CANQUEUE 255
163
164static int scsi_debug_add_host = DEF_NUM_HOST;
165static int scsi_debug_ato = DEF_ATO;
166static int scsi_debug_delay = DEF_DELAY;
167static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB;
168static int scsi_debug_dif = DEF_DIF;
169static int scsi_debug_dix = DEF_DIX;
170static int scsi_debug_dsense = DEF_D_SENSE;
171static int scsi_debug_every_nth = DEF_EVERY_NTH;
172static int scsi_debug_fake_rw = DEF_FAKE_RW;
173static unsigned int scsi_debug_guard = DEF_GUARD;
174static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED;
175static int scsi_debug_max_luns = DEF_MAX_LUNS;
176static int scsi_debug_max_queue = SCSI_DEBUG_CANQUEUE;
177static int scsi_debug_no_lun_0 = DEF_NO_LUN_0;
178static int scsi_debug_no_uld = 0;
179static int scsi_debug_num_parts = DEF_NUM_PARTS;
180static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */
181static int scsi_debug_opt_blks = DEF_OPT_BLKS;
182static int scsi_debug_opts = DEF_OPTS;
183static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP;
184static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */
185static int scsi_debug_scsi_level = DEF_SCSI_LEVEL;
186static int scsi_debug_sector_size = DEF_SECTOR_SIZE;
187static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB;
188static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
189static unsigned int scsi_debug_lbpu = DEF_LBPU;
190static unsigned int scsi_debug_lbpws = DEF_LBPWS;
191static unsigned int scsi_debug_lbpws10 = DEF_LBPWS10;
192static unsigned int scsi_debug_lbprz = DEF_LBPRZ;
193static unsigned int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
194static unsigned int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY;
195static unsigned int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
196static unsigned int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
197static unsigned int scsi_debug_write_same_length = DEF_WRITESAME_LENGTH;
198static bool scsi_debug_removable = DEF_REMOVABLE;
199static bool scsi_debug_clustering;
200
201static int scsi_debug_cmnd_count = 0;
202
203#define DEV_READONLY(TGT) (0)
204
205static unsigned int sdebug_store_sectors;
206static sector_t sdebug_capacity; /* in sectors */
207
208/* old BIOS stuff, kernel may get rid of them but some mode sense pages
209 may still need them */
210static int sdebug_heads; /* heads per disk */
211static int sdebug_cylinders_per; /* cylinders per surface */
212static int sdebug_sectors_per; /* sectors per cylinder */
213
214#define SDEBUG_MAX_PARTS 4
215
216#define SDEBUG_SENSE_LEN 32
217
218#define SCSI_DEBUG_MAX_CMD_LEN 32
219
220static unsigned int scsi_debug_lbp(void)
221{
222 return scsi_debug_lbpu | scsi_debug_lbpws | scsi_debug_lbpws10;
223}
224
225struct sdebug_dev_info {
226 struct list_head dev_list;
227 unsigned char sense_buff[SDEBUG_SENSE_LEN]; /* weak nexus */
228 unsigned int channel;
229 unsigned int target;
230 unsigned int lun;
231 struct sdebug_host_info *sdbg_host;
232 unsigned int wlun;
233 char reset;
234 char stopped;
235 char used;
236};
237
238struct sdebug_host_info {
239 struct list_head host_list;
240 struct Scsi_Host *shost;
241 struct device dev;
242 struct list_head dev_info_list;
243};
244
245#define to_sdebug_host(d) \
246 container_of(d, struct sdebug_host_info, dev)
247
248static LIST_HEAD(sdebug_host_list);
249static DEFINE_SPINLOCK(sdebug_host_list_lock);
250
251typedef void (* done_funct_t) (struct scsi_cmnd *);
252
253struct sdebug_queued_cmd {
254 int in_use;
255 struct timer_list cmnd_timer;
256 done_funct_t done_funct;
257 struct scsi_cmnd * a_cmnd;
258 int scsi_result;
259};
260static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
261
262static unsigned char * fake_storep; /* ramdisk storage */
263static struct sd_dif_tuple *dif_storep; /* protection info */
264static void *map_storep; /* provisioning map */
265
266static unsigned long map_size;
267static int num_aborts = 0;
268static int num_dev_resets = 0;
269static int num_bus_resets = 0;
270static int num_host_resets = 0;
271static int dix_writes;
272static int dix_reads;
273static int dif_errors;
274
275static DEFINE_SPINLOCK(queued_arr_lock);
276static DEFINE_RWLOCK(atomic_rw);
277
278static char sdebug_proc_name[] = "scsi_debug";
279
280static struct bus_type pseudo_lld_bus;
281
282static struct device_driver sdebug_driverfs_driver = {
283 .name = sdebug_proc_name,
284 .bus = &pseudo_lld_bus,
285};
286
287static const int check_condition_result =
288 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
289
290static const int illegal_condition_result =
291 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
292
293static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
294 0, 0, 0x2, 0x4b};
295static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
296 0, 0, 0x0, 0x0};
297
298static void *fake_store(unsigned long long lba)
299{
300 lba = do_div(lba, sdebug_store_sectors);
301
302 return fake_storep + lba * scsi_debug_sector_size;
303}
304
305static struct sd_dif_tuple *dif_store(sector_t sector)
306{
307 sector = do_div(sector, sdebug_store_sectors);
308
309 return dif_storep + sector;
310}
311
312static int sdebug_add_adapter(void);
313static void sdebug_remove_adapter(void);
314
315static void sdebug_max_tgts_luns(void)
316{
317 struct sdebug_host_info *sdbg_host;
318 struct Scsi_Host *hpnt;
319
320 spin_lock(&sdebug_host_list_lock);
321 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
322 hpnt = sdbg_host->shost;
323 if ((hpnt->this_id >= 0) &&
324 (scsi_debug_num_tgts > hpnt->this_id))
325 hpnt->max_id = scsi_debug_num_tgts + 1;
326 else
327 hpnt->max_id = scsi_debug_num_tgts;
328 /* scsi_debug_max_luns; */
329 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS;
330 }
331 spin_unlock(&sdebug_host_list_lock);
332}
333
334static void mk_sense_buffer(struct sdebug_dev_info *devip, int key,
335 int asc, int asq)
336{
337 unsigned char *sbuff;
338
339 sbuff = devip->sense_buff;
340 memset(sbuff, 0, SDEBUG_SENSE_LEN);
341
342 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, key, asc, asq);
343
344 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
345 printk(KERN_INFO "scsi_debug: [sense_key,asc,ascq]: "
346 "[0x%x,0x%x,0x%x]\n", key, asc, asq);
347}
348
349static void get_data_transfer_info(unsigned char *cmd,
350 unsigned long long *lba, unsigned int *num,
351 u32 *ei_lba)
352{
353 *ei_lba = 0;
354
355 switch (*cmd) {
356 case VARIABLE_LENGTH_CMD:
357 *lba = (u64)cmd[19] | (u64)cmd[18] << 8 |
358 (u64)cmd[17] << 16 | (u64)cmd[16] << 24 |
359 (u64)cmd[15] << 32 | (u64)cmd[14] << 40 |
360 (u64)cmd[13] << 48 | (u64)cmd[12] << 56;
361
362 *ei_lba = (u32)cmd[23] | (u32)cmd[22] << 8 |
363 (u32)cmd[21] << 16 | (u32)cmd[20] << 24;
364
365 *num = (u32)cmd[31] | (u32)cmd[30] << 8 | (u32)cmd[29] << 16 |
366 (u32)cmd[28] << 24;
367 break;
368
369 case WRITE_SAME_16:
370 case WRITE_16:
371 case READ_16:
372 *lba = (u64)cmd[9] | (u64)cmd[8] << 8 |
373 (u64)cmd[7] << 16 | (u64)cmd[6] << 24 |
374 (u64)cmd[5] << 32 | (u64)cmd[4] << 40 |
375 (u64)cmd[3] << 48 | (u64)cmd[2] << 56;
376
377 *num = (u32)cmd[13] | (u32)cmd[12] << 8 | (u32)cmd[11] << 16 |
378 (u32)cmd[10] << 24;
379 break;
380 case WRITE_12:
381 case READ_12:
382 *lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 |
383 (u32)cmd[2] << 24;
384
385 *num = (u32)cmd[9] | (u32)cmd[8] << 8 | (u32)cmd[7] << 16 |
386 (u32)cmd[6] << 24;
387 break;
388 case WRITE_SAME:
389 case WRITE_10:
390 case READ_10:
391 case XDWRITEREAD_10:
392 *lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 |
393 (u32)cmd[2] << 24;
394
395 *num = (u32)cmd[8] | (u32)cmd[7] << 8;
396 break;
397 case WRITE_6:
398 case READ_6:
399 *lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
400 (u32)(cmd[1] & 0x1f) << 16;
401 *num = (0 == cmd[4]) ? 256 : cmd[4];
402 break;
403 default:
404 break;
405 }
406}
407
408static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
409{
410 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
411 printk(KERN_INFO "scsi_debug: ioctl: cmd=0x%x\n", cmd);
412 }
413 return -EINVAL;
414 /* return -ENOTTY; // correct return but upsets fdisk */
415}
416
417static int check_readiness(struct scsi_cmnd * SCpnt, int reset_only,
418 struct sdebug_dev_info * devip)
419{
420 if (devip->reset) {
421 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
422 printk(KERN_INFO "scsi_debug: Reporting Unit "
423 "attention: power on reset\n");
424 devip->reset = 0;
425 mk_sense_buffer(devip, UNIT_ATTENTION, POWERON_RESET, 0);
426 return check_condition_result;
427 }
428 if ((0 == reset_only) && devip->stopped) {
429 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
430 printk(KERN_INFO "scsi_debug: Reporting Not "
431 "ready: initializing command required\n");
432 mk_sense_buffer(devip, NOT_READY, LOGICAL_UNIT_NOT_READY,
433 0x2);
434 return check_condition_result;
435 }
436 return 0;
437}
438
439/* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */
440static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
441 int arr_len)
442{
443 int act_len;
444 struct scsi_data_buffer *sdb = scsi_in(scp);
445
446 if (!sdb->length)
447 return 0;
448 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
449 return (DID_ERROR << 16);
450
451 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
452 arr, arr_len);
453 sdb->resid = scsi_bufflen(scp) - act_len;
454
455 return 0;
456}
457
458/* Returns number of bytes fetched into 'arr' or -1 if error. */
459static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
460 int arr_len)
461{
462 if (!scsi_bufflen(scp))
463 return 0;
464 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE))
465 return -1;
466
467 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
468}
469
470
471static const char * inq_vendor_id = "Linux ";
472static const char * inq_product_id = "scsi_debug ";
473static const char * inq_product_rev = "0004";
474
475static int inquiry_evpd_83(unsigned char * arr, int port_group_id,
476 int target_dev_id, int dev_id_num,
477 const char * dev_id_str,
478 int dev_id_str_len)
479{
480 int num, port_a;
481 char b[32];
482
483 port_a = target_dev_id + 1;
484 /* T10 vendor identifier field format (faked) */
485 arr[0] = 0x2; /* ASCII */
486 arr[1] = 0x1;
487 arr[2] = 0x0;
488 memcpy(&arr[4], inq_vendor_id, 8);
489 memcpy(&arr[12], inq_product_id, 16);
490 memcpy(&arr[28], dev_id_str, dev_id_str_len);
491 num = 8 + 16 + dev_id_str_len;
492 arr[3] = num;
493 num += 4;
494 if (dev_id_num >= 0) {
495 /* NAA-5, Logical unit identifier (binary) */
496 arr[num++] = 0x1; /* binary (not necessarily sas) */
497 arr[num++] = 0x3; /* PIV=0, lu, naa */
498 arr[num++] = 0x0;
499 arr[num++] = 0x8;
500 arr[num++] = 0x53; /* naa-5 ieee company id=0x333333 (fake) */
501 arr[num++] = 0x33;
502 arr[num++] = 0x33;
503 arr[num++] = 0x30;
504 arr[num++] = (dev_id_num >> 24);
505 arr[num++] = (dev_id_num >> 16) & 0xff;
506 arr[num++] = (dev_id_num >> 8) & 0xff;
507 arr[num++] = dev_id_num & 0xff;
508 /* Target relative port number */
509 arr[num++] = 0x61; /* proto=sas, binary */
510 arr[num++] = 0x94; /* PIV=1, target port, rel port */
511 arr[num++] = 0x0; /* reserved */
512 arr[num++] = 0x4; /* length */
513 arr[num++] = 0x0; /* reserved */
514 arr[num++] = 0x0; /* reserved */
515 arr[num++] = 0x0;
516 arr[num++] = 0x1; /* relative port A */
517 }
518 /* NAA-5, Target port identifier */
519 arr[num++] = 0x61; /* proto=sas, binary */
520 arr[num++] = 0x93; /* piv=1, target port, naa */
521 arr[num++] = 0x0;
522 arr[num++] = 0x8;
523 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
524 arr[num++] = 0x22;
525 arr[num++] = 0x22;
526 arr[num++] = 0x20;
527 arr[num++] = (port_a >> 24);
528 arr[num++] = (port_a >> 16) & 0xff;
529 arr[num++] = (port_a >> 8) & 0xff;
530 arr[num++] = port_a & 0xff;
531 /* NAA-5, Target port group identifier */
532 arr[num++] = 0x61; /* proto=sas, binary */
533 arr[num++] = 0x95; /* piv=1, target port group id */
534 arr[num++] = 0x0;
535 arr[num++] = 0x4;
536 arr[num++] = 0;
537 arr[num++] = 0;
538 arr[num++] = (port_group_id >> 8) & 0xff;
539 arr[num++] = port_group_id & 0xff;
540 /* NAA-5, Target device identifier */
541 arr[num++] = 0x61; /* proto=sas, binary */
542 arr[num++] = 0xa3; /* piv=1, target device, naa */
543 arr[num++] = 0x0;
544 arr[num++] = 0x8;
545 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
546 arr[num++] = 0x22;
547 arr[num++] = 0x22;
548 arr[num++] = 0x20;
549 arr[num++] = (target_dev_id >> 24);
550 arr[num++] = (target_dev_id >> 16) & 0xff;
551 arr[num++] = (target_dev_id >> 8) & 0xff;
552 arr[num++] = target_dev_id & 0xff;
553 /* SCSI name string: Target device identifier */
554 arr[num++] = 0x63; /* proto=sas, UTF-8 */
555 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
556 arr[num++] = 0x0;
557 arr[num++] = 24;
558 memcpy(arr + num, "naa.52222220", 12);
559 num += 12;
560 snprintf(b, sizeof(b), "%08X", target_dev_id);
561 memcpy(arr + num, b, 8);
562 num += 8;
563 memset(arr + num, 0, 4);
564 num += 4;
565 return num;
566}
567
568
569static unsigned char vpd84_data[] = {
570/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
571 0x22,0x22,0x22,0x0,0xbb,0x1,
572 0x22,0x22,0x22,0x0,0xbb,0x2,
573};
574
575static int inquiry_evpd_84(unsigned char * arr)
576{
577 memcpy(arr, vpd84_data, sizeof(vpd84_data));
578 return sizeof(vpd84_data);
579}
580
581static int inquiry_evpd_85(unsigned char * arr)
582{
583 int num = 0;
584 const char * na1 = "https://www.kernel.org/config";
585 const char * na2 = "http://www.kernel.org/log";
586 int plen, olen;
587
588 arr[num++] = 0x1; /* lu, storage config */
589 arr[num++] = 0x0; /* reserved */
590 arr[num++] = 0x0;
591 olen = strlen(na1);
592 plen = olen + 1;
593 if (plen % 4)
594 plen = ((plen / 4) + 1) * 4;
595 arr[num++] = plen; /* length, null termianted, padded */
596 memcpy(arr + num, na1, olen);
597 memset(arr + num + olen, 0, plen - olen);
598 num += plen;
599
600 arr[num++] = 0x4; /* lu, logging */
601 arr[num++] = 0x0; /* reserved */
602 arr[num++] = 0x0;
603 olen = strlen(na2);
604 plen = olen + 1;
605 if (plen % 4)
606 plen = ((plen / 4) + 1) * 4;
607 arr[num++] = plen; /* length, null terminated, padded */
608 memcpy(arr + num, na2, olen);
609 memset(arr + num + olen, 0, plen - olen);
610 num += plen;
611
612 return num;
613}
614
615/* SCSI ports VPD page */
616static int inquiry_evpd_88(unsigned char * arr, int target_dev_id)
617{
618 int num = 0;
619 int port_a, port_b;
620
621 port_a = target_dev_id + 1;
622 port_b = port_a + 1;
623 arr[num++] = 0x0; /* reserved */
624 arr[num++] = 0x0; /* reserved */
625 arr[num++] = 0x0;
626 arr[num++] = 0x1; /* relative port 1 (primary) */
627 memset(arr + num, 0, 6);
628 num += 6;
629 arr[num++] = 0x0;
630 arr[num++] = 12; /* length tp descriptor */
631 /* naa-5 target port identifier (A) */
632 arr[num++] = 0x61; /* proto=sas, binary */
633 arr[num++] = 0x93; /* PIV=1, target port, NAA */
634 arr[num++] = 0x0; /* reserved */
635 arr[num++] = 0x8; /* length */
636 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
637 arr[num++] = 0x22;
638 arr[num++] = 0x22;
639 arr[num++] = 0x20;
640 arr[num++] = (port_a >> 24);
641 arr[num++] = (port_a >> 16) & 0xff;
642 arr[num++] = (port_a >> 8) & 0xff;
643 arr[num++] = port_a & 0xff;
644
645 arr[num++] = 0x0; /* reserved */
646 arr[num++] = 0x0; /* reserved */
647 arr[num++] = 0x0;
648 arr[num++] = 0x2; /* relative port 2 (secondary) */
649 memset(arr + num, 0, 6);
650 num += 6;
651 arr[num++] = 0x0;
652 arr[num++] = 12; /* length tp descriptor */
653 /* naa-5 target port identifier (B) */
654 arr[num++] = 0x61; /* proto=sas, binary */
655 arr[num++] = 0x93; /* PIV=1, target port, NAA */
656 arr[num++] = 0x0; /* reserved */
657 arr[num++] = 0x8; /* length */
658 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
659 arr[num++] = 0x22;
660 arr[num++] = 0x22;
661 arr[num++] = 0x20;
662 arr[num++] = (port_b >> 24);
663 arr[num++] = (port_b >> 16) & 0xff;
664 arr[num++] = (port_b >> 8) & 0xff;
665 arr[num++] = port_b & 0xff;
666
667 return num;
668}
669
670
671static unsigned char vpd89_data[] = {
672/* from 4th byte */ 0,0,0,0,
673'l','i','n','u','x',' ',' ',' ',
674'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
675'1','2','3','4',
6760x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
6770xec,0,0,0,
6780x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
6790,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
6800x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
6810x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
6820x53,0x41,
6830x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
6840x20,0x20,
6850x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
6860x10,0x80,
6870,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
6880x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
6890x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
6900,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
6910x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
6920x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
6930,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
6940,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6950,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6960,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6970x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
6980,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
6990xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
7000,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
7010,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
7020,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
7030,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
7040,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
7050,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
7060,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
7070,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
7080,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
7090,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
7100,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
7110,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
7120,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
713};
714
715static int inquiry_evpd_89(unsigned char * arr)
716{
717 memcpy(arr, vpd89_data, sizeof(vpd89_data));
718 return sizeof(vpd89_data);
719}
720
721
722/* Block limits VPD page (SBC-3) */
723static unsigned char vpdb0_data[] = {
724 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
725 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
726 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
727 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
728};
729
730static int inquiry_evpd_b0(unsigned char * arr)
731{
732 unsigned int gran;
733
734 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
735
736 /* Optimal transfer length granularity */
737 gran = 1 << scsi_debug_physblk_exp;
738 arr[2] = (gran >> 8) & 0xff;
739 arr[3] = gran & 0xff;
740
741 /* Maximum Transfer Length */
742 if (sdebug_store_sectors > 0x400) {
743 arr[4] = (sdebug_store_sectors >> 24) & 0xff;
744 arr[5] = (sdebug_store_sectors >> 16) & 0xff;
745 arr[6] = (sdebug_store_sectors >> 8) & 0xff;
746 arr[7] = sdebug_store_sectors & 0xff;
747 }
748
749 /* Optimal Transfer Length */
750 put_unaligned_be32(scsi_debug_opt_blks, &arr[8]);
751
752 if (scsi_debug_lbpu) {
753 /* Maximum Unmap LBA Count */
754 put_unaligned_be32(scsi_debug_unmap_max_blocks, &arr[16]);
755
756 /* Maximum Unmap Block Descriptor Count */
757 put_unaligned_be32(scsi_debug_unmap_max_desc, &arr[20]);
758 }
759
760 /* Unmap Granularity Alignment */
761 if (scsi_debug_unmap_alignment) {
762 put_unaligned_be32(scsi_debug_unmap_alignment, &arr[28]);
763 arr[28] |= 0x80; /* UGAVALID */
764 }
765
766 /* Optimal Unmap Granularity */
767 put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]);
768
769 /* Maximum WRITE SAME Length */
770 put_unaligned_be64(scsi_debug_write_same_length, &arr[32]);
771
772 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
773
774 return sizeof(vpdb0_data);
775}
776
777/* Block device characteristics VPD page (SBC-3) */
778static int inquiry_evpd_b1(unsigned char *arr)
779{
780 memset(arr, 0, 0x3c);
781 arr[0] = 0;
782 arr[1] = 1; /* non rotating medium (e.g. solid state) */
783 arr[2] = 0;
784 arr[3] = 5; /* less than 1.8" */
785
786 return 0x3c;
787}
788
789/* Logical block provisioning VPD page (SBC-3) */
790static int inquiry_evpd_b2(unsigned char *arr)
791{
792 memset(arr, 0, 0x4);
793 arr[0] = 0; /* threshold exponent */
794
795 if (scsi_debug_lbpu)
796 arr[1] = 1 << 7;
797
798 if (scsi_debug_lbpws)
799 arr[1] |= 1 << 6;
800
801 if (scsi_debug_lbpws10)
802 arr[1] |= 1 << 5;
803
804 if (scsi_debug_lbprz)
805 arr[1] |= 1 << 2;
806
807 return 0x4;
808}
809
810#define SDEBUG_LONG_INQ_SZ 96
811#define SDEBUG_MAX_INQ_ARR_SZ 584
812
813static int resp_inquiry(struct scsi_cmnd * scp, int target,
814 struct sdebug_dev_info * devip)
815{
816 unsigned char pq_pdt;
817 unsigned char * arr;
818 unsigned char *cmd = (unsigned char *)scp->cmnd;
819 int alloc_len, n, ret;
820
821 alloc_len = (cmd[3] << 8) + cmd[4];
822 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
823 if (! arr)
824 return DID_REQUEUE << 16;
825 if (devip->wlun)
826 pq_pdt = 0x1e; /* present, wlun */
827 else if (scsi_debug_no_lun_0 && (0 == devip->lun))
828 pq_pdt = 0x7f; /* not present, no device type */
829 else
830 pq_pdt = (scsi_debug_ptype & 0x1f);
831 arr[0] = pq_pdt;
832 if (0x2 & cmd[1]) { /* CMDDT bit set */
833 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
834 0);
835 kfree(arr);
836 return check_condition_result;
837 } else if (0x1 & cmd[1]) { /* EVPD bit set */
838 int lu_id_num, port_group_id, target_dev_id, len;
839 char lu_id_str[6];
840 int host_no = devip->sdbg_host->shost->host_no;
841
842 port_group_id = (((host_no + 1) & 0x7f) << 8) +
843 (devip->channel & 0x7f);
844 if (0 == scsi_debug_vpd_use_hostno)
845 host_no = 0;
846 lu_id_num = devip->wlun ? -1 : (((host_no + 1) * 2000) +
847 (devip->target * 1000) + devip->lun);
848 target_dev_id = ((host_no + 1) * 2000) +
849 (devip->target * 1000) - 3;
850 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
851 if (0 == cmd[2]) { /* supported vital product data pages */
852 arr[1] = cmd[2]; /*sanity */
853 n = 4;
854 arr[n++] = 0x0; /* this page */
855 arr[n++] = 0x80; /* unit serial number */
856 arr[n++] = 0x83; /* device identification */
857 arr[n++] = 0x84; /* software interface ident. */
858 arr[n++] = 0x85; /* management network addresses */
859 arr[n++] = 0x86; /* extended inquiry */
860 arr[n++] = 0x87; /* mode page policy */
861 arr[n++] = 0x88; /* SCSI ports */
862 arr[n++] = 0x89; /* ATA information */
863 arr[n++] = 0xb0; /* Block limits (SBC) */
864 arr[n++] = 0xb1; /* Block characteristics (SBC) */
865 if (scsi_debug_lbp()) /* Logical Block Prov. (SBC) */
866 arr[n++] = 0xb2;
867 arr[3] = n - 4; /* number of supported VPD pages */
868 } else if (0x80 == cmd[2]) { /* unit serial number */
869 arr[1] = cmd[2]; /*sanity */
870 arr[3] = len;
871 memcpy(&arr[4], lu_id_str, len);
872 } else if (0x83 == cmd[2]) { /* device identification */
873 arr[1] = cmd[2]; /*sanity */
874 arr[3] = inquiry_evpd_83(&arr[4], port_group_id,
875 target_dev_id, lu_id_num,
876 lu_id_str, len);
877 } else if (0x84 == cmd[2]) { /* Software interface ident. */
878 arr[1] = cmd[2]; /*sanity */
879 arr[3] = inquiry_evpd_84(&arr[4]);
880 } else if (0x85 == cmd[2]) { /* Management network addresses */
881 arr[1] = cmd[2]; /*sanity */
882 arr[3] = inquiry_evpd_85(&arr[4]);
883 } else if (0x86 == cmd[2]) { /* extended inquiry */
884 arr[1] = cmd[2]; /*sanity */
885 arr[3] = 0x3c; /* number of following entries */
886 if (scsi_debug_dif == SD_DIF_TYPE3_PROTECTION)
887 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
888 else if (scsi_debug_dif)
889 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
890 else
891 arr[4] = 0x0; /* no protection stuff */
892 arr[5] = 0x7; /* head of q, ordered + simple q's */
893 } else if (0x87 == cmd[2]) { /* mode page policy */
894 arr[1] = cmd[2]; /*sanity */
895 arr[3] = 0x8; /* number of following entries */
896 arr[4] = 0x2; /* disconnect-reconnect mp */
897 arr[6] = 0x80; /* mlus, shared */
898 arr[8] = 0x18; /* protocol specific lu */
899 arr[10] = 0x82; /* mlus, per initiator port */
900 } else if (0x88 == cmd[2]) { /* SCSI Ports */
901 arr[1] = cmd[2]; /*sanity */
902 arr[3] = inquiry_evpd_88(&arr[4], target_dev_id);
903 } else if (0x89 == cmd[2]) { /* ATA information */
904 arr[1] = cmd[2]; /*sanity */
905 n = inquiry_evpd_89(&arr[4]);
906 arr[2] = (n >> 8);
907 arr[3] = (n & 0xff);
908 } else if (0xb0 == cmd[2]) { /* Block limits (SBC) */
909 arr[1] = cmd[2]; /*sanity */
910 arr[3] = inquiry_evpd_b0(&arr[4]);
911 } else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */
912 arr[1] = cmd[2]; /*sanity */
913 arr[3] = inquiry_evpd_b1(&arr[4]);
914 } else if (0xb2 == cmd[2]) { /* Logical Block Prov. (SBC) */
915 arr[1] = cmd[2]; /*sanity */
916 arr[3] = inquiry_evpd_b2(&arr[4]);
917 } else {
918 /* Illegal request, invalid field in cdb */
919 mk_sense_buffer(devip, ILLEGAL_REQUEST,
920 INVALID_FIELD_IN_CDB, 0);
921 kfree(arr);
922 return check_condition_result;
923 }
924 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
925 ret = fill_from_dev_buffer(scp, arr,
926 min(len, SDEBUG_MAX_INQ_ARR_SZ));
927 kfree(arr);
928 return ret;
929 }
930 /* drops through here for a standard inquiry */
931 arr[1] = scsi_debug_removable ? 0x80 : 0; /* Removable disk */
932 arr[2] = scsi_debug_scsi_level;
933 arr[3] = 2; /* response_data_format==2 */
934 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
935 arr[5] = scsi_debug_dif ? 1 : 0; /* PROTECT bit */
936 if (0 == scsi_debug_vpd_use_hostno)
937 arr[5] = 0x10; /* claim: implicit TGPS */
938 arr[6] = 0x10; /* claim: MultiP */
939 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
940 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
941 memcpy(&arr[8], inq_vendor_id, 8);
942 memcpy(&arr[16], inq_product_id, 16);
943 memcpy(&arr[32], inq_product_rev, 4);
944 /* version descriptors (2 bytes each) follow */
945 arr[58] = 0x0; arr[59] = 0x77; /* SAM-3 ANSI */
946 arr[60] = 0x3; arr[61] = 0x14; /* SPC-3 ANSI */
947 n = 62;
948 if (scsi_debug_ptype == 0) {
949 arr[n++] = 0x3; arr[n++] = 0x3d; /* SBC-2 ANSI */
950 } else if (scsi_debug_ptype == 1) {
951 arr[n++] = 0x3; arr[n++] = 0x60; /* SSC-2 no version */
952 }
953 arr[n++] = 0xc; arr[n++] = 0xf; /* SAS-1.1 rev 10 */
954 ret = fill_from_dev_buffer(scp, arr,
955 min(alloc_len, SDEBUG_LONG_INQ_SZ));
956 kfree(arr);
957 return ret;
958}
959
960static int resp_requests(struct scsi_cmnd * scp,
961 struct sdebug_dev_info * devip)
962{
963 unsigned char * sbuff;
964 unsigned char *cmd = (unsigned char *)scp->cmnd;
965 unsigned char arr[SDEBUG_SENSE_LEN];
966 int want_dsense;
967 int len = 18;
968
969 memset(arr, 0, sizeof(arr));
970 if (devip->reset == 1)
971 mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0);
972 want_dsense = !!(cmd[1] & 1) || scsi_debug_dsense;
973 sbuff = devip->sense_buff;
974 if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
975 if (want_dsense) {
976 arr[0] = 0x72;
977 arr[1] = 0x0; /* NO_SENSE in sense_key */
978 arr[2] = THRESHOLD_EXCEEDED;
979 arr[3] = 0xff; /* TEST set and MRIE==6 */
980 } else {
981 arr[0] = 0x70;
982 arr[2] = 0x0; /* NO_SENSE in sense_key */
983 arr[7] = 0xa; /* 18 byte sense buffer */
984 arr[12] = THRESHOLD_EXCEEDED;
985 arr[13] = 0xff; /* TEST set and MRIE==6 */
986 }
987 } else {
988 memcpy(arr, sbuff, SDEBUG_SENSE_LEN);
989 if ((cmd[1] & 1) && (! scsi_debug_dsense)) {
990 /* DESC bit set and sense_buff in fixed format */
991 memset(arr, 0, sizeof(arr));
992 arr[0] = 0x72;
993 arr[1] = sbuff[2]; /* sense key */
994 arr[2] = sbuff[12]; /* asc */
995 arr[3] = sbuff[13]; /* ascq */
996 len = 8;
997 }
998 }
999 mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0);
1000 return fill_from_dev_buffer(scp, arr, len);
1001}
1002
1003static int resp_start_stop(struct scsi_cmnd * scp,
1004 struct sdebug_dev_info * devip)
1005{
1006 unsigned char *cmd = (unsigned char *)scp->cmnd;
1007 int power_cond, errsts, start;
1008
1009 if ((errsts = check_readiness(scp, 1, devip)))
1010 return errsts;
1011 power_cond = (cmd[4] & 0xf0) >> 4;
1012 if (power_cond) {
1013 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
1014 0);
1015 return check_condition_result;
1016 }
1017 start = cmd[4] & 1;
1018 if (start == devip->stopped)
1019 devip->stopped = !start;
1020 return 0;
1021}
1022
1023static sector_t get_sdebug_capacity(void)
1024{
1025 if (scsi_debug_virtual_gb > 0)
1026 return (sector_t)scsi_debug_virtual_gb *
1027 (1073741824 / scsi_debug_sector_size);
1028 else
1029 return sdebug_store_sectors;
1030}
1031
1032#define SDEBUG_READCAP_ARR_SZ 8
1033static int resp_readcap(struct scsi_cmnd * scp,
1034 struct sdebug_dev_info * devip)
1035{
1036 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
1037 unsigned int capac;
1038 int errsts;
1039
1040 if ((errsts = check_readiness(scp, 1, devip)))
1041 return errsts;
1042 /* following just in case virtual_gb changed */
1043 sdebug_capacity = get_sdebug_capacity();
1044 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
1045 if (sdebug_capacity < 0xffffffff) {
1046 capac = (unsigned int)sdebug_capacity - 1;
1047 arr[0] = (capac >> 24);
1048 arr[1] = (capac >> 16) & 0xff;
1049 arr[2] = (capac >> 8) & 0xff;
1050 arr[3] = capac & 0xff;
1051 } else {
1052 arr[0] = 0xff;
1053 arr[1] = 0xff;
1054 arr[2] = 0xff;
1055 arr[3] = 0xff;
1056 }
1057 arr[6] = (scsi_debug_sector_size >> 8) & 0xff;
1058 arr[7] = scsi_debug_sector_size & 0xff;
1059 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1060}
1061
1062#define SDEBUG_READCAP16_ARR_SZ 32
1063static int resp_readcap16(struct scsi_cmnd * scp,
1064 struct sdebug_dev_info * devip)
1065{
1066 unsigned char *cmd = (unsigned char *)scp->cmnd;
1067 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
1068 unsigned long long capac;
1069 int errsts, k, alloc_len;
1070
1071 if ((errsts = check_readiness(scp, 1, devip)))
1072 return errsts;
1073 alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8)
1074 + cmd[13]);
1075 /* following just in case virtual_gb changed */
1076 sdebug_capacity = get_sdebug_capacity();
1077 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
1078 capac = sdebug_capacity - 1;
1079 for (k = 0; k < 8; ++k, capac >>= 8)
1080 arr[7 - k] = capac & 0xff;
1081 arr[8] = (scsi_debug_sector_size >> 24) & 0xff;
1082 arr[9] = (scsi_debug_sector_size >> 16) & 0xff;
1083 arr[10] = (scsi_debug_sector_size >> 8) & 0xff;
1084 arr[11] = scsi_debug_sector_size & 0xff;
1085 arr[13] = scsi_debug_physblk_exp & 0xf;
1086 arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f;
1087
1088 if (scsi_debug_lbp()) {
1089 arr[14] |= 0x80; /* LBPME */
1090 if (scsi_debug_lbprz)
1091 arr[14] |= 0x40; /* LBPRZ */
1092 }
1093
1094 arr[15] = scsi_debug_lowest_aligned & 0xff;
1095
1096 if (scsi_debug_dif) {
1097 arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */
1098 arr[12] |= 1; /* PROT_EN */
1099 }
1100
1101 return fill_from_dev_buffer(scp, arr,
1102 min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
1103}
1104
1105#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1106
1107static int resp_report_tgtpgs(struct scsi_cmnd * scp,
1108 struct sdebug_dev_info * devip)
1109{
1110 unsigned char *cmd = (unsigned char *)scp->cmnd;
1111 unsigned char * arr;
1112 int host_no = devip->sdbg_host->shost->host_no;
1113 int n, ret, alen, rlen;
1114 int port_group_a, port_group_b, port_a, port_b;
1115
1116 alen = ((cmd[6] << 24) + (cmd[7] << 16) + (cmd[8] << 8)
1117 + cmd[9]);
1118
1119 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1120 if (! arr)
1121 return DID_REQUEUE << 16;
1122 /*
1123 * EVPD page 0x88 states we have two ports, one
1124 * real and a fake port with no device connected.
1125 * So we create two port groups with one port each
1126 * and set the group with port B to unavailable.
1127 */
1128 port_a = 0x1; /* relative port A */
1129 port_b = 0x2; /* relative port B */
1130 port_group_a = (((host_no + 1) & 0x7f) << 8) +
1131 (devip->channel & 0x7f);
1132 port_group_b = (((host_no + 1) & 0x7f) << 8) +
1133 (devip->channel & 0x7f) + 0x80;
1134
1135 /*
1136 * The asymmetric access state is cycled according to the host_id.
1137 */
1138 n = 4;
1139 if (0 == scsi_debug_vpd_use_hostno) {
1140 arr[n++] = host_no % 3; /* Asymm access state */
1141 arr[n++] = 0x0F; /* claim: all states are supported */
1142 } else {
1143 arr[n++] = 0x0; /* Active/Optimized path */
1144 arr[n++] = 0x01; /* claim: only support active/optimized paths */
1145 }
1146 arr[n++] = (port_group_a >> 8) & 0xff;
1147 arr[n++] = port_group_a & 0xff;
1148 arr[n++] = 0; /* Reserved */
1149 arr[n++] = 0; /* Status code */
1150 arr[n++] = 0; /* Vendor unique */
1151 arr[n++] = 0x1; /* One port per group */
1152 arr[n++] = 0; /* Reserved */
1153 arr[n++] = 0; /* Reserved */
1154 arr[n++] = (port_a >> 8) & 0xff;
1155 arr[n++] = port_a & 0xff;
1156 arr[n++] = 3; /* Port unavailable */
1157 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
1158 arr[n++] = (port_group_b >> 8) & 0xff;
1159 arr[n++] = port_group_b & 0xff;
1160 arr[n++] = 0; /* Reserved */
1161 arr[n++] = 0; /* Status code */
1162 arr[n++] = 0; /* Vendor unique */
1163 arr[n++] = 0x1; /* One port per group */
1164 arr[n++] = 0; /* Reserved */
1165 arr[n++] = 0; /* Reserved */
1166 arr[n++] = (port_b >> 8) & 0xff;
1167 arr[n++] = port_b & 0xff;
1168
1169 rlen = n - 4;
1170 arr[0] = (rlen >> 24) & 0xff;
1171 arr[1] = (rlen >> 16) & 0xff;
1172 arr[2] = (rlen >> 8) & 0xff;
1173 arr[3] = rlen & 0xff;
1174
1175 /*
1176 * Return the smallest value of either
1177 * - The allocated length
1178 * - The constructed command length
1179 * - The maximum array size
1180 */
1181 rlen = min(alen,n);
1182 ret = fill_from_dev_buffer(scp, arr,
1183 min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1184 kfree(arr);
1185 return ret;
1186}
1187
1188/* <<Following mode page info copied from ST318451LW>> */
1189
1190static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target)
1191{ /* Read-Write Error Recovery page for mode_sense */
1192 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
1193 5, 0, 0xff, 0xff};
1194
1195 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
1196 if (1 == pcontrol)
1197 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
1198 return sizeof(err_recov_pg);
1199}
1200
1201static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target)
1202{ /* Disconnect-Reconnect page for mode_sense */
1203 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
1204 0, 0, 0, 0, 0, 0, 0, 0};
1205
1206 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
1207 if (1 == pcontrol)
1208 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
1209 return sizeof(disconnect_pg);
1210}
1211
1212static int resp_format_pg(unsigned char * p, int pcontrol, int target)
1213{ /* Format device page for mode_sense */
1214 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
1215 0, 0, 0, 0, 0, 0, 0, 0,
1216 0, 0, 0, 0, 0x40, 0, 0, 0};
1217
1218 memcpy(p, format_pg, sizeof(format_pg));
1219 p[10] = (sdebug_sectors_per >> 8) & 0xff;
1220 p[11] = sdebug_sectors_per & 0xff;
1221 p[12] = (scsi_debug_sector_size >> 8) & 0xff;
1222 p[13] = scsi_debug_sector_size & 0xff;
1223 if (scsi_debug_removable)
1224 p[20] |= 0x20; /* should agree with INQUIRY */
1225 if (1 == pcontrol)
1226 memset(p + 2, 0, sizeof(format_pg) - 2);
1227 return sizeof(format_pg);
1228}
1229
1230static int resp_caching_pg(unsigned char * p, int pcontrol, int target)
1231{ /* Caching page for mode_sense */
1232 unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
1233 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
1234
1235 memcpy(p, caching_pg, sizeof(caching_pg));
1236 if (1 == pcontrol)
1237 memset(p + 2, 0, sizeof(caching_pg) - 2);
1238 return sizeof(caching_pg);
1239}
1240
1241static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
1242{ /* Control mode page for mode_sense */
1243 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
1244 0, 0, 0, 0};
1245 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
1246 0, 0, 0x2, 0x4b};
1247
1248 if (scsi_debug_dsense)
1249 ctrl_m_pg[2] |= 0x4;
1250 else
1251 ctrl_m_pg[2] &= ~0x4;
1252
1253 if (scsi_debug_ato)
1254 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
1255
1256 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
1257 if (1 == pcontrol)
1258 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
1259 else if (2 == pcontrol)
1260 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
1261 return sizeof(ctrl_m_pg);
1262}
1263
1264
1265static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target)
1266{ /* Informational Exceptions control mode page for mode_sense */
1267 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
1268 0, 0, 0x0, 0x0};
1269 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1270 0, 0, 0x0, 0x0};
1271
1272 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
1273 if (1 == pcontrol)
1274 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
1275 else if (2 == pcontrol)
1276 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
1277 return sizeof(iec_m_pg);
1278}
1279
1280static int resp_sas_sf_m_pg(unsigned char * p, int pcontrol, int target)
1281{ /* SAS SSP mode page - short format for mode_sense */
1282 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
1283 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
1284
1285 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
1286 if (1 == pcontrol)
1287 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
1288 return sizeof(sas_sf_m_pg);
1289}
1290
1291
1292static int resp_sas_pcd_m_spg(unsigned char * p, int pcontrol, int target,
1293 int target_dev_id)
1294{ /* SAS phy control and discover mode page for mode_sense */
1295 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
1296 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
1297 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1298 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1299 0x2, 0, 0, 0, 0, 0, 0, 0,
1300 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1301 0, 0, 0, 0, 0, 0, 0, 0,
1302 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
1303 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1304 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1305 0x3, 0, 0, 0, 0, 0, 0, 0,
1306 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1307 0, 0, 0, 0, 0, 0, 0, 0,
1308 };
1309 int port_a, port_b;
1310
1311 port_a = target_dev_id + 1;
1312 port_b = port_a + 1;
1313 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
1314 p[20] = (port_a >> 24);
1315 p[21] = (port_a >> 16) & 0xff;
1316 p[22] = (port_a >> 8) & 0xff;
1317 p[23] = port_a & 0xff;
1318 p[48 + 20] = (port_b >> 24);
1319 p[48 + 21] = (port_b >> 16) & 0xff;
1320 p[48 + 22] = (port_b >> 8) & 0xff;
1321 p[48 + 23] = port_b & 0xff;
1322 if (1 == pcontrol)
1323 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
1324 return sizeof(sas_pcd_m_pg);
1325}
1326
1327static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol)
1328{ /* SAS SSP shared protocol specific port mode subpage */
1329 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
1330 0, 0, 0, 0, 0, 0, 0, 0,
1331 };
1332
1333 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
1334 if (1 == pcontrol)
1335 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
1336 return sizeof(sas_sha_m_pg);
1337}
1338
1339#define SDEBUG_MAX_MSENSE_SZ 256
1340
1341static int resp_mode_sense(struct scsi_cmnd * scp, int target,
1342 struct sdebug_dev_info * devip)
1343{
1344 unsigned char dbd, llbaa;
1345 int pcontrol, pcode, subpcode, bd_len;
1346 unsigned char dev_spec;
1347 int k, alloc_len, msense_6, offset, len, errsts, target_dev_id;
1348 unsigned char * ap;
1349 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
1350 unsigned char *cmd = (unsigned char *)scp->cmnd;
1351
1352 if ((errsts = check_readiness(scp, 1, devip)))
1353 return errsts;
1354 dbd = !!(cmd[1] & 0x8);
1355 pcontrol = (cmd[2] & 0xc0) >> 6;
1356 pcode = cmd[2] & 0x3f;
1357 subpcode = cmd[3];
1358 msense_6 = (MODE_SENSE == cmd[0]);
1359 llbaa = msense_6 ? 0 : !!(cmd[1] & 0x10);
1360 if ((0 == scsi_debug_ptype) && (0 == dbd))
1361 bd_len = llbaa ? 16 : 8;
1362 else
1363 bd_len = 0;
1364 alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]);
1365 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
1366 if (0x3 == pcontrol) { /* Saving values not supported */
1367 mk_sense_buffer(devip, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP,
1368 0);
1369 return check_condition_result;
1370 }
1371 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
1372 (devip->target * 1000) - 3;
1373 /* set DPOFUA bit for disks */
1374 if (0 == scsi_debug_ptype)
1375 dev_spec = (DEV_READONLY(target) ? 0x80 : 0x0) | 0x10;
1376 else
1377 dev_spec = 0x0;
1378 if (msense_6) {
1379 arr[2] = dev_spec;
1380 arr[3] = bd_len;
1381 offset = 4;
1382 } else {
1383 arr[3] = dev_spec;
1384 if (16 == bd_len)
1385 arr[4] = 0x1; /* set LONGLBA bit */
1386 arr[7] = bd_len; /* assume 255 or less */
1387 offset = 8;
1388 }
1389 ap = arr + offset;
1390 if ((bd_len > 0) && (!sdebug_capacity))
1391 sdebug_capacity = get_sdebug_capacity();
1392
1393 if (8 == bd_len) {
1394 if (sdebug_capacity > 0xfffffffe) {
1395 ap[0] = 0xff;
1396 ap[1] = 0xff;
1397 ap[2] = 0xff;
1398 ap[3] = 0xff;
1399 } else {
1400 ap[0] = (sdebug_capacity >> 24) & 0xff;
1401 ap[1] = (sdebug_capacity >> 16) & 0xff;
1402 ap[2] = (sdebug_capacity >> 8) & 0xff;
1403 ap[3] = sdebug_capacity & 0xff;
1404 }
1405 ap[6] = (scsi_debug_sector_size >> 8) & 0xff;
1406 ap[7] = scsi_debug_sector_size & 0xff;
1407 offset += bd_len;
1408 ap = arr + offset;
1409 } else if (16 == bd_len) {
1410 unsigned long long capac = sdebug_capacity;
1411
1412 for (k = 0; k < 8; ++k, capac >>= 8)
1413 ap[7 - k] = capac & 0xff;
1414 ap[12] = (scsi_debug_sector_size >> 24) & 0xff;
1415 ap[13] = (scsi_debug_sector_size >> 16) & 0xff;
1416 ap[14] = (scsi_debug_sector_size >> 8) & 0xff;
1417 ap[15] = scsi_debug_sector_size & 0xff;
1418 offset += bd_len;
1419 ap = arr + offset;
1420 }
1421
1422 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
1423 /* TODO: Control Extension page */
1424 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
1425 0);
1426 return check_condition_result;
1427 }
1428 switch (pcode) {
1429 case 0x1: /* Read-Write error recovery page, direct access */
1430 len = resp_err_recov_pg(ap, pcontrol, target);
1431 offset += len;
1432 break;
1433 case 0x2: /* Disconnect-Reconnect page, all devices */
1434 len = resp_disconnect_pg(ap, pcontrol, target);
1435 offset += len;
1436 break;
1437 case 0x3: /* Format device page, direct access */
1438 len = resp_format_pg(ap, pcontrol, target);
1439 offset += len;
1440 break;
1441 case 0x8: /* Caching page, direct access */
1442 len = resp_caching_pg(ap, pcontrol, target);
1443 offset += len;
1444 break;
1445 case 0xa: /* Control Mode page, all devices */
1446 len = resp_ctrl_m_pg(ap, pcontrol, target);
1447 offset += len;
1448 break;
1449 case 0x19: /* if spc==1 then sas phy, control+discover */
1450 if ((subpcode > 0x2) && (subpcode < 0xff)) {
1451 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1452 INVALID_FIELD_IN_CDB, 0);
1453 return check_condition_result;
1454 }
1455 len = 0;
1456 if ((0x0 == subpcode) || (0xff == subpcode))
1457 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
1458 if ((0x1 == subpcode) || (0xff == subpcode))
1459 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
1460 target_dev_id);
1461 if ((0x2 == subpcode) || (0xff == subpcode))
1462 len += resp_sas_sha_m_spg(ap + len, pcontrol);
1463 offset += len;
1464 break;
1465 case 0x1c: /* Informational Exceptions Mode page, all devices */
1466 len = resp_iec_m_pg(ap, pcontrol, target);
1467 offset += len;
1468 break;
1469 case 0x3f: /* Read all Mode pages */
1470 if ((0 == subpcode) || (0xff == subpcode)) {
1471 len = resp_err_recov_pg(ap, pcontrol, target);
1472 len += resp_disconnect_pg(ap + len, pcontrol, target);
1473 len += resp_format_pg(ap + len, pcontrol, target);
1474 len += resp_caching_pg(ap + len, pcontrol, target);
1475 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
1476 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
1477 if (0xff == subpcode) {
1478 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
1479 target, target_dev_id);
1480 len += resp_sas_sha_m_spg(ap + len, pcontrol);
1481 }
1482 len += resp_iec_m_pg(ap + len, pcontrol, target);
1483 } else {
1484 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1485 INVALID_FIELD_IN_CDB, 0);
1486 return check_condition_result;
1487 }
1488 offset += len;
1489 break;
1490 default:
1491 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
1492 0);
1493 return check_condition_result;
1494 }
1495 if (msense_6)
1496 arr[0] = offset - 1;
1497 else {
1498 arr[0] = ((offset - 2) >> 8) & 0xff;
1499 arr[1] = (offset - 2) & 0xff;
1500 }
1501 return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
1502}
1503
1504#define SDEBUG_MAX_MSELECT_SZ 512
1505
1506static int resp_mode_select(struct scsi_cmnd * scp, int mselect6,
1507 struct sdebug_dev_info * devip)
1508{
1509 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
1510 int param_len, res, errsts, mpage;
1511 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
1512 unsigned char *cmd = (unsigned char *)scp->cmnd;
1513
1514 if ((errsts = check_readiness(scp, 1, devip)))
1515 return errsts;
1516 memset(arr, 0, sizeof(arr));
1517 pf = cmd[1] & 0x10;
1518 sp = cmd[1] & 0x1;
1519 param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]);
1520 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
1521 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1522 INVALID_FIELD_IN_CDB, 0);
1523 return check_condition_result;
1524 }
1525 res = fetch_to_dev_buffer(scp, arr, param_len);
1526 if (-1 == res)
1527 return (DID_ERROR << 16);
1528 else if ((res < param_len) &&
1529 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
1530 printk(KERN_INFO "scsi_debug: mode_select: cdb indicated=%d, "
1531 " IO sent=%d bytes\n", param_len, res);
1532 md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2);
1533 bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]);
1534 if (md_len > 2) {
1535 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1536 INVALID_FIELD_IN_PARAM_LIST, 0);
1537 return check_condition_result;
1538 }
1539 off = bd_len + (mselect6 ? 4 : 8);
1540 mpage = arr[off] & 0x3f;
1541 ps = !!(arr[off] & 0x80);
1542 if (ps) {
1543 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1544 INVALID_FIELD_IN_PARAM_LIST, 0);
1545 return check_condition_result;
1546 }
1547 spf = !!(arr[off] & 0x40);
1548 pg_len = spf ? ((arr[off + 2] << 8) + arr[off + 3] + 4) :
1549 (arr[off + 1] + 2);
1550 if ((pg_len + off) > param_len) {
1551 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1552 PARAMETER_LIST_LENGTH_ERR, 0);
1553 return check_condition_result;
1554 }
1555 switch (mpage) {
1556 case 0xa: /* Control Mode page */
1557 if (ctrl_m_pg[1] == arr[off + 1]) {
1558 memcpy(ctrl_m_pg + 2, arr + off + 2,
1559 sizeof(ctrl_m_pg) - 2);
1560 scsi_debug_dsense = !!(ctrl_m_pg[2] & 0x4);
1561 return 0;
1562 }
1563 break;
1564 case 0x1c: /* Informational Exceptions Mode page */
1565 if (iec_m_pg[1] == arr[off + 1]) {
1566 memcpy(iec_m_pg + 2, arr + off + 2,
1567 sizeof(iec_m_pg) - 2);
1568 return 0;
1569 }
1570 break;
1571 default:
1572 break;
1573 }
1574 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1575 INVALID_FIELD_IN_PARAM_LIST, 0);
1576 return check_condition_result;
1577}
1578
1579static int resp_temp_l_pg(unsigned char * arr)
1580{
1581 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
1582 0x0, 0x1, 0x3, 0x2, 0x0, 65,
1583 };
1584
1585 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
1586 return sizeof(temp_l_pg);
1587}
1588
1589static int resp_ie_l_pg(unsigned char * arr)
1590{
1591 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
1592 };
1593
1594 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
1595 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
1596 arr[4] = THRESHOLD_EXCEEDED;
1597 arr[5] = 0xff;
1598 }
1599 return sizeof(ie_l_pg);
1600}
1601
1602#define SDEBUG_MAX_LSENSE_SZ 512
1603
1604static int resp_log_sense(struct scsi_cmnd * scp,
1605 struct sdebug_dev_info * devip)
1606{
1607 int ppc, sp, pcontrol, pcode, subpcode, alloc_len, errsts, len, n;
1608 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
1609 unsigned char *cmd = (unsigned char *)scp->cmnd;
1610
1611 if ((errsts = check_readiness(scp, 1, devip)))
1612 return errsts;
1613 memset(arr, 0, sizeof(arr));
1614 ppc = cmd[1] & 0x2;
1615 sp = cmd[1] & 0x1;
1616 if (ppc || sp) {
1617 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1618 INVALID_FIELD_IN_CDB, 0);
1619 return check_condition_result;
1620 }
1621 pcontrol = (cmd[2] & 0xc0) >> 6;
1622 pcode = cmd[2] & 0x3f;
1623 subpcode = cmd[3] & 0xff;
1624 alloc_len = (cmd[7] << 8) + cmd[8];
1625 arr[0] = pcode;
1626 if (0 == subpcode) {
1627 switch (pcode) {
1628 case 0x0: /* Supported log pages log page */
1629 n = 4;
1630 arr[n++] = 0x0; /* this page */
1631 arr[n++] = 0xd; /* Temperature */
1632 arr[n++] = 0x2f; /* Informational exceptions */
1633 arr[3] = n - 4;
1634 break;
1635 case 0xd: /* Temperature log page */
1636 arr[3] = resp_temp_l_pg(arr + 4);
1637 break;
1638 case 0x2f: /* Informational exceptions log page */
1639 arr[3] = resp_ie_l_pg(arr + 4);
1640 break;
1641 default:
1642 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1643 INVALID_FIELD_IN_CDB, 0);
1644 return check_condition_result;
1645 }
1646 } else if (0xff == subpcode) {
1647 arr[0] |= 0x40;
1648 arr[1] = subpcode;
1649 switch (pcode) {
1650 case 0x0: /* Supported log pages and subpages log page */
1651 n = 4;
1652 arr[n++] = 0x0;
1653 arr[n++] = 0x0; /* 0,0 page */
1654 arr[n++] = 0x0;
1655 arr[n++] = 0xff; /* this page */
1656 arr[n++] = 0xd;
1657 arr[n++] = 0x0; /* Temperature */
1658 arr[n++] = 0x2f;
1659 arr[n++] = 0x0; /* Informational exceptions */
1660 arr[3] = n - 4;
1661 break;
1662 case 0xd: /* Temperature subpages */
1663 n = 4;
1664 arr[n++] = 0xd;
1665 arr[n++] = 0x0; /* Temperature */
1666 arr[3] = n - 4;
1667 break;
1668 case 0x2f: /* Informational exceptions subpages */
1669 n = 4;
1670 arr[n++] = 0x2f;
1671 arr[n++] = 0x0; /* Informational exceptions */
1672 arr[3] = n - 4;
1673 break;
1674 default:
1675 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1676 INVALID_FIELD_IN_CDB, 0);
1677 return check_condition_result;
1678 }
1679 } else {
1680 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1681 INVALID_FIELD_IN_CDB, 0);
1682 return check_condition_result;
1683 }
1684 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
1685 return fill_from_dev_buffer(scp, arr,
1686 min(len, SDEBUG_MAX_INQ_ARR_SZ));
1687}
1688
1689static int check_device_access_params(struct sdebug_dev_info *devi,
1690 unsigned long long lba, unsigned int num)
1691{
1692 if (lba + num > sdebug_capacity) {
1693 mk_sense_buffer(devi, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE, 0);
1694 return check_condition_result;
1695 }
1696 /* transfer length excessive (tie in to block limits VPD page) */
1697 if (num > sdebug_store_sectors) {
1698 mk_sense_buffer(devi, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
1699 return check_condition_result;
1700 }
1701 return 0;
1702}
1703
1704/* Returns number of bytes copied or -1 if error. */
1705static int do_device_access(struct scsi_cmnd *scmd,
1706 struct sdebug_dev_info *devi,
1707 unsigned long long lba, unsigned int num, int write)
1708{
1709 int ret;
1710 unsigned long long block, rest = 0;
1711 struct scsi_data_buffer *sdb;
1712 enum dma_data_direction dir;
1713 size_t (*func)(struct scatterlist *, unsigned int, void *, size_t,
1714 off_t);
1715
1716 if (write) {
1717 sdb = scsi_out(scmd);
1718 dir = DMA_TO_DEVICE;
1719 func = sg_pcopy_to_buffer;
1720 } else {
1721 sdb = scsi_in(scmd);
1722 dir = DMA_FROM_DEVICE;
1723 func = sg_pcopy_from_buffer;
1724 }
1725
1726 if (!sdb->length)
1727 return 0;
1728 if (!(scsi_bidi_cmnd(scmd) || scmd->sc_data_direction == dir))
1729 return -1;
1730
1731 block = do_div(lba, sdebug_store_sectors);
1732 if (block + num > sdebug_store_sectors)
1733 rest = block + num - sdebug_store_sectors;
1734
1735 ret = func(sdb->table.sgl, sdb->table.nents,
1736 fake_storep + (block * scsi_debug_sector_size),
1737 (num - rest) * scsi_debug_sector_size, 0);
1738 if (ret != (num - rest) * scsi_debug_sector_size)
1739 return ret;
1740
1741 if (rest) {
1742 ret += func(sdb->table.sgl, sdb->table.nents,
1743 fake_storep, rest * scsi_debug_sector_size,
1744 (num - rest) * scsi_debug_sector_size);
1745 }
1746
1747 return ret;
1748}
1749
1750static __be16 dif_compute_csum(const void *buf, int len)
1751{
1752 __be16 csum;
1753
1754 if (scsi_debug_guard)
1755 csum = (__force __be16)ip_compute_csum(buf, len);
1756 else
1757 csum = cpu_to_be16(crc_t10dif(buf, len));
1758
1759 return csum;
1760}
1761
1762static int dif_verify(struct sd_dif_tuple *sdt, const void *data,
1763 sector_t sector, u32 ei_lba)
1764{
1765 __be16 csum = dif_compute_csum(data, scsi_debug_sector_size);
1766
1767 if (sdt->guard_tag != csum) {
1768 pr_err("%s: GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
1769 __func__,
1770 (unsigned long)sector,
1771 be16_to_cpu(sdt->guard_tag),
1772 be16_to_cpu(csum));
1773 return 0x01;
1774 }
1775 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION &&
1776 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
1777 pr_err("%s: REF check failed on sector %lu\n",
1778 __func__, (unsigned long)sector);
1779 return 0x03;
1780 }
1781 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
1782 be32_to_cpu(sdt->ref_tag) != ei_lba) {
1783 pr_err("%s: REF check failed on sector %lu\n",
1784 __func__, (unsigned long)sector);
1785 return 0x03;
1786 }
1787 return 0;
1788}
1789
1790static void dif_copy_prot(struct scsi_cmnd *SCpnt, sector_t sector,
1791 unsigned int sectors, bool read)
1792{
1793 size_t resid;
1794 void *paddr;
1795 const void *dif_store_end = dif_storep + sdebug_store_sectors;
1796 struct sg_mapping_iter miter;
1797
1798 /* Bytes of protection data to copy into sgl */
1799 resid = sectors * sizeof(*dif_storep);
1800
1801 sg_miter_start(&miter, scsi_prot_sglist(SCpnt),
1802 scsi_prot_sg_count(SCpnt), SG_MITER_ATOMIC |
1803 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
1804
1805 while (sg_miter_next(&miter) && resid > 0) {
1806 size_t len = min(miter.length, resid);
1807 void *start = dif_store(sector);
1808 size_t rest = 0;
1809
1810 if (dif_store_end < start + len)
1811 rest = start + len - dif_store_end;
1812
1813 paddr = miter.addr;
1814
1815 if (read)
1816 memcpy(paddr, start, len - rest);
1817 else
1818 memcpy(start, paddr, len - rest);
1819
1820 if (rest) {
1821 if (read)
1822 memcpy(paddr + len - rest, dif_storep, rest);
1823 else
1824 memcpy(dif_storep, paddr + len - rest, rest);
1825 }
1826
1827 sector += len / sizeof(*dif_storep);
1828 resid -= len;
1829 }
1830 sg_miter_stop(&miter);
1831}
1832
1833static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
1834 unsigned int sectors, u32 ei_lba)
1835{
1836 unsigned int i;
1837 struct sd_dif_tuple *sdt;
1838 sector_t sector;
1839
1840 for (i = 0; i < sectors; i++, ei_lba++) {
1841 int ret;
1842
1843 sector = start_sec + i;
1844 sdt = dif_store(sector);
1845
1846 if (sdt->app_tag == cpu_to_be16(0xffff))
1847 continue;
1848
1849 ret = dif_verify(sdt, fake_store(sector), sector, ei_lba);
1850 if (ret) {
1851 dif_errors++;
1852 return ret;
1853 }
1854 }
1855
1856 dif_copy_prot(SCpnt, start_sec, sectors, true);
1857 dix_reads++;
1858
1859 return 0;
1860}
1861
1862static int resp_read(struct scsi_cmnd *SCpnt, unsigned long long lba,
1863 unsigned int num, struct sdebug_dev_info *devip,
1864 u32 ei_lba)
1865{
1866 unsigned long iflags;
1867 int ret;
1868
1869 ret = check_device_access_params(devip, lba, num);
1870 if (ret)
1871 return ret;
1872
1873 if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) &&
1874 (lba <= (OPT_MEDIUM_ERR_ADDR + OPT_MEDIUM_ERR_NUM - 1)) &&
1875 ((lba + num) > OPT_MEDIUM_ERR_ADDR)) {
1876 /* claim unrecoverable read error */
1877 mk_sense_buffer(devip, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
1878 /* set info field and valid bit for fixed descriptor */
1879 if (0x70 == (devip->sense_buff[0] & 0x7f)) {
1880 devip->sense_buff[0] |= 0x80; /* Valid bit */
1881 ret = (lba < OPT_MEDIUM_ERR_ADDR)
1882 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
1883 devip->sense_buff[3] = (ret >> 24) & 0xff;
1884 devip->sense_buff[4] = (ret >> 16) & 0xff;
1885 devip->sense_buff[5] = (ret >> 8) & 0xff;
1886 devip->sense_buff[6] = ret & 0xff;
1887 }
1888 scsi_set_resid(SCpnt, scsi_bufflen(SCpnt));
1889 return check_condition_result;
1890 }
1891
1892 read_lock_irqsave(&atomic_rw, iflags);
1893
1894 /* DIX + T10 DIF */
1895 if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
1896 int prot_ret = prot_verify_read(SCpnt, lba, num, ei_lba);
1897
1898 if (prot_ret) {
1899 read_unlock_irqrestore(&atomic_rw, iflags);
1900 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, prot_ret);
1901 return illegal_condition_result;
1902 }
1903 }
1904
1905 ret = do_device_access(SCpnt, devip, lba, num, 0);
1906 read_unlock_irqrestore(&atomic_rw, iflags);
1907 if (ret == -1)
1908 return DID_ERROR << 16;
1909
1910 scsi_in(SCpnt)->resid = scsi_bufflen(SCpnt) - ret;
1911
1912 return 0;
1913}
1914
1915void dump_sector(unsigned char *buf, int len)
1916{
1917 int i, j;
1918
1919 printk(KERN_ERR ">>> Sector Dump <<<\n");
1920
1921 for (i = 0 ; i < len ; i += 16) {
1922 printk(KERN_ERR "%04d: ", i);
1923
1924 for (j = 0 ; j < 16 ; j++) {
1925 unsigned char c = buf[i+j];
1926 if (c >= 0x20 && c < 0x7e)
1927 printk(" %c ", buf[i+j]);
1928 else
1929 printk("%02x ", buf[i+j]);
1930 }
1931
1932 printk("\n");
1933 }
1934}
1935
1936static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
1937 unsigned int sectors, u32 ei_lba)
1938{
1939 int ret;
1940 struct sd_dif_tuple *sdt;
1941 void *daddr;
1942 sector_t sector = start_sec;
1943 int ppage_offset;
1944 int dpage_offset;
1945 struct sg_mapping_iter diter;
1946 struct sg_mapping_iter piter;
1947
1948 BUG_ON(scsi_sg_count(SCpnt) == 0);
1949 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
1950
1951 sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
1952 scsi_prot_sg_count(SCpnt),
1953 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
1954 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
1955 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
1956
1957 /* For each protection page */
1958 while (sg_miter_next(&piter)) {
1959 dpage_offset = 0;
1960 if (WARN_ON(!sg_miter_next(&diter))) {
1961 ret = 0x01;
1962 goto out;
1963 }
1964
1965 for (ppage_offset = 0; ppage_offset < piter.length;
1966 ppage_offset += sizeof(struct sd_dif_tuple)) {
1967 /* If we're at the end of the current
1968 * data page advance to the next one
1969 */
1970 if (dpage_offset >= diter.length) {
1971 if (WARN_ON(!sg_miter_next(&diter))) {
1972 ret = 0x01;
1973 goto out;
1974 }
1975 dpage_offset = 0;
1976 }
1977
1978 sdt = piter.addr + ppage_offset;
1979 daddr = diter.addr + dpage_offset;
1980
1981 ret = dif_verify(sdt, daddr, sector, ei_lba);
1982 if (ret) {
1983 dump_sector(daddr, scsi_debug_sector_size);
1984 goto out;
1985 }
1986
1987 sector++;
1988 ei_lba++;
1989 dpage_offset += scsi_debug_sector_size;
1990 }
1991 diter.consumed = dpage_offset;
1992 sg_miter_stop(&diter);
1993 }
1994 sg_miter_stop(&piter);
1995
1996 dif_copy_prot(SCpnt, start_sec, sectors, false);
1997 dix_writes++;
1998
1999 return 0;
2000
2001out:
2002 dif_errors++;
2003 sg_miter_stop(&diter);
2004 sg_miter_stop(&piter);
2005 return ret;
2006}
2007
2008static unsigned long lba_to_map_index(sector_t lba)
2009{
2010 if (scsi_debug_unmap_alignment) {
2011 lba += scsi_debug_unmap_granularity -
2012 scsi_debug_unmap_alignment;
2013 }
2014 do_div(lba, scsi_debug_unmap_granularity);
2015
2016 return lba;
2017}
2018
2019static sector_t map_index_to_lba(unsigned long index)
2020{
2021 sector_t lba = index * scsi_debug_unmap_granularity;
2022
2023 if (scsi_debug_unmap_alignment) {
2024 lba -= scsi_debug_unmap_granularity -
2025 scsi_debug_unmap_alignment;
2026 }
2027
2028 return lba;
2029}
2030
2031static unsigned int map_state(sector_t lba, unsigned int *num)
2032{
2033 sector_t end;
2034 unsigned int mapped;
2035 unsigned long index;
2036 unsigned long next;
2037
2038 index = lba_to_map_index(lba);
2039 mapped = test_bit(index, map_storep);
2040
2041 if (mapped)
2042 next = find_next_zero_bit(map_storep, map_size, index);
2043 else
2044 next = find_next_bit(map_storep, map_size, index);
2045
2046 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
2047 *num = end - lba;
2048
2049 return mapped;
2050}
2051
2052static void map_region(sector_t lba, unsigned int len)
2053{
2054 sector_t end = lba + len;
2055
2056 while (lba < end) {
2057 unsigned long index = lba_to_map_index(lba);
2058
2059 if (index < map_size)
2060 set_bit(index, map_storep);
2061
2062 lba = map_index_to_lba(index + 1);
2063 }
2064}
2065
2066static void unmap_region(sector_t lba, unsigned int len)
2067{
2068 sector_t end = lba + len;
2069
2070 while (lba < end) {
2071 unsigned long index = lba_to_map_index(lba);
2072
2073 if (lba == map_index_to_lba(index) &&
2074 lba + scsi_debug_unmap_granularity <= end &&
2075 index < map_size) {
2076 clear_bit(index, map_storep);
2077 if (scsi_debug_lbprz) {
2078 memset(fake_storep +
2079 lba * scsi_debug_sector_size, 0,
2080 scsi_debug_sector_size *
2081 scsi_debug_unmap_granularity);
2082 }
2083 if (dif_storep) {
2084 memset(dif_storep + lba, 0xff,
2085 sizeof(*dif_storep) *
2086 scsi_debug_unmap_granularity);
2087 }
2088 }
2089 lba = map_index_to_lba(index + 1);
2090 }
2091}
2092
2093static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba,
2094 unsigned int num, struct sdebug_dev_info *devip,
2095 u32 ei_lba)
2096{
2097 unsigned long iflags;
2098 int ret;
2099
2100 ret = check_device_access_params(devip, lba, num);
2101 if (ret)
2102 return ret;
2103
2104 write_lock_irqsave(&atomic_rw, iflags);
2105
2106 /* DIX + T10 DIF */
2107 if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
2108 int prot_ret = prot_verify_write(SCpnt, lba, num, ei_lba);
2109
2110 if (prot_ret) {
2111 write_unlock_irqrestore(&atomic_rw, iflags);
2112 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, prot_ret);
2113 return illegal_condition_result;
2114 }
2115 }
2116
2117 ret = do_device_access(SCpnt, devip, lba, num, 1);
2118 if (scsi_debug_lbp())
2119 map_region(lba, num);
2120 write_unlock_irqrestore(&atomic_rw, iflags);
2121 if (-1 == ret)
2122 return (DID_ERROR << 16);
2123 else if ((ret < (num * scsi_debug_sector_size)) &&
2124 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2125 printk(KERN_INFO "scsi_debug: write: cdb indicated=%u, "
2126 " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret);
2127
2128 return 0;
2129}
2130
2131static int resp_write_same(struct scsi_cmnd *scmd, unsigned long long lba,
2132 unsigned int num, struct sdebug_dev_info *devip,
2133 u32 ei_lba, unsigned int unmap)
2134{
2135 unsigned long iflags;
2136 unsigned long long i;
2137 int ret;
2138
2139 ret = check_device_access_params(devip, lba, num);
2140 if (ret)
2141 return ret;
2142
2143 if (num > scsi_debug_write_same_length) {
2144 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
2145 0);
2146 return check_condition_result;
2147 }
2148
2149 write_lock_irqsave(&atomic_rw, iflags);
2150
2151 if (unmap && scsi_debug_lbp()) {
2152 unmap_region(lba, num);
2153 goto out;
2154 }
2155
2156 /* Else fetch one logical block */
2157 ret = fetch_to_dev_buffer(scmd,
2158 fake_storep + (lba * scsi_debug_sector_size),
2159 scsi_debug_sector_size);
2160
2161 if (-1 == ret) {
2162 write_unlock_irqrestore(&atomic_rw, iflags);
2163 return (DID_ERROR << 16);
2164 } else if ((ret < (num * scsi_debug_sector_size)) &&
2165 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2166 printk(KERN_INFO "scsi_debug: write same: cdb indicated=%u, "
2167 " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret);
2168
2169 /* Copy first sector to remaining blocks */
2170 for (i = 1 ; i < num ; i++)
2171 memcpy(fake_storep + ((lba + i) * scsi_debug_sector_size),
2172 fake_storep + (lba * scsi_debug_sector_size),
2173 scsi_debug_sector_size);
2174
2175 if (scsi_debug_lbp())
2176 map_region(lba, num);
2177out:
2178 write_unlock_irqrestore(&atomic_rw, iflags);
2179
2180 return 0;
2181}
2182
2183struct unmap_block_desc {
2184 __be64 lba;
2185 __be32 blocks;
2186 __be32 __reserved;
2187};
2188
2189static int resp_unmap(struct scsi_cmnd * scmd, struct sdebug_dev_info * devip)
2190{
2191 unsigned char *buf;
2192 struct unmap_block_desc *desc;
2193 unsigned int i, payload_len, descriptors;
2194 int ret;
2195 unsigned long iflags;
2196
2197 ret = check_readiness(scmd, 1, devip);
2198 if (ret)
2199 return ret;
2200
2201 payload_len = get_unaligned_be16(&scmd->cmnd[7]);
2202 BUG_ON(scsi_bufflen(scmd) != payload_len);
2203
2204 descriptors = (payload_len - 8) / 16;
2205
2206 buf = kmalloc(scsi_bufflen(scmd), GFP_ATOMIC);
2207 if (!buf)
2208 return check_condition_result;
2209
2210 scsi_sg_copy_to_buffer(scmd, buf, scsi_bufflen(scmd));
2211
2212 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
2213 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
2214
2215 desc = (void *)&buf[8];
2216
2217 write_lock_irqsave(&atomic_rw, iflags);
2218
2219 for (i = 0 ; i < descriptors ; i++) {
2220 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
2221 unsigned int num = get_unaligned_be32(&desc[i].blocks);
2222
2223 ret = check_device_access_params(devip, lba, num);
2224 if (ret)
2225 goto out;
2226
2227 unmap_region(lba, num);
2228 }
2229
2230 ret = 0;
2231
2232out:
2233 write_unlock_irqrestore(&atomic_rw, iflags);
2234 kfree(buf);
2235
2236 return ret;
2237}
2238
2239#define SDEBUG_GET_LBA_STATUS_LEN 32
2240
2241static int resp_get_lba_status(struct scsi_cmnd * scmd,
2242 struct sdebug_dev_info * devip)
2243{
2244 unsigned long long lba;
2245 unsigned int alloc_len, mapped, num;
2246 unsigned char arr[SDEBUG_GET_LBA_STATUS_LEN];
2247 int ret;
2248
2249 ret = check_readiness(scmd, 1, devip);
2250 if (ret)
2251 return ret;
2252
2253 lba = get_unaligned_be64(&scmd->cmnd[2]);
2254 alloc_len = get_unaligned_be32(&scmd->cmnd[10]);
2255
2256 if (alloc_len < 24)
2257 return 0;
2258
2259 ret = check_device_access_params(devip, lba, 1);
2260 if (ret)
2261 return ret;
2262
2263 mapped = map_state(lba, &num);
2264
2265 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
2266 put_unaligned_be32(20, &arr[0]); /* Parameter Data Length */
2267 put_unaligned_be64(lba, &arr[8]); /* LBA */
2268 put_unaligned_be32(num, &arr[16]); /* Number of blocks */
2269 arr[20] = !mapped; /* mapped = 0, unmapped = 1 */
2270
2271 return fill_from_dev_buffer(scmd, arr, SDEBUG_GET_LBA_STATUS_LEN);
2272}
2273
2274#define SDEBUG_RLUN_ARR_SZ 256
2275
2276static int resp_report_luns(struct scsi_cmnd * scp,
2277 struct sdebug_dev_info * devip)
2278{
2279 unsigned int alloc_len;
2280 int lun_cnt, i, upper, num, n, wlun, lun;
2281 unsigned char *cmd = (unsigned char *)scp->cmnd;
2282 int select_report = (int)cmd[2];
2283 struct scsi_lun *one_lun;
2284 unsigned char arr[SDEBUG_RLUN_ARR_SZ];
2285 unsigned char * max_addr;
2286
2287 alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
2288 if ((alloc_len < 4) || (select_report > 2)) {
2289 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
2290 0);
2291 return check_condition_result;
2292 }
2293 /* can produce response with up to 16k luns (lun 0 to lun 16383) */
2294 memset(arr, 0, SDEBUG_RLUN_ARR_SZ);
2295 lun_cnt = scsi_debug_max_luns;
2296 if (1 == select_report)
2297 lun_cnt = 0;
2298 else if (scsi_debug_no_lun_0 && (lun_cnt > 0))
2299 --lun_cnt;
2300 wlun = (select_report > 0) ? 1 : 0;
2301 num = lun_cnt + wlun;
2302 arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff;
2303 arr[3] = (sizeof(struct scsi_lun) * num) & 0xff;
2304 n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) /
2305 sizeof(struct scsi_lun)), num);
2306 if (n < num) {
2307 wlun = 0;
2308 lun_cnt = n;
2309 }
2310 one_lun = (struct scsi_lun *) &arr[8];
2311 max_addr = arr + SDEBUG_RLUN_ARR_SZ;
2312 for (i = 0, lun = (scsi_debug_no_lun_0 ? 1 : 0);
2313 ((i < lun_cnt) && ((unsigned char *)(one_lun + i) < max_addr));
2314 i++, lun++) {
2315 upper = (lun >> 8) & 0x3f;
2316 if (upper)
2317 one_lun[i].scsi_lun[0] =
2318 (upper | (SAM2_LUN_ADDRESS_METHOD << 6));
2319 one_lun[i].scsi_lun[1] = lun & 0xff;
2320 }
2321 if (wlun) {
2322 one_lun[i].scsi_lun[0] = (SAM2_WLUN_REPORT_LUNS >> 8) & 0xff;
2323 one_lun[i].scsi_lun[1] = SAM2_WLUN_REPORT_LUNS & 0xff;
2324 i++;
2325 }
2326 alloc_len = (unsigned char *)(one_lun + i) - arr;
2327 return fill_from_dev_buffer(scp, arr,
2328 min((int)alloc_len, SDEBUG_RLUN_ARR_SZ));
2329}
2330
2331static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
2332 unsigned int num, struct sdebug_dev_info *devip)
2333{
2334 int j;
2335 unsigned char *kaddr, *buf;
2336 unsigned int offset;
2337 struct scsi_data_buffer *sdb = scsi_in(scp);
2338 struct sg_mapping_iter miter;
2339
2340 /* better not to use temporary buffer. */
2341 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
2342 if (!buf) {
2343 mk_sense_buffer(devip, NOT_READY,
2344 LOGICAL_UNIT_COMMUNICATION_FAILURE, 0);
2345 return check_condition_result;
2346 }
2347
2348 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
2349
2350 offset = 0;
2351 sg_miter_start(&miter, sdb->table.sgl, sdb->table.nents,
2352 SG_MITER_ATOMIC | SG_MITER_TO_SG);
2353
2354 while (sg_miter_next(&miter)) {
2355 kaddr = miter.addr;
2356 for (j = 0; j < miter.length; j++)
2357 *(kaddr + j) ^= *(buf + offset + j);
2358
2359 offset += miter.length;
2360 }
2361 sg_miter_stop(&miter);
2362 kfree(buf);
2363
2364 return 0;
2365}
2366
2367/* When timer goes off this function is called. */
2368static void timer_intr_handler(unsigned long indx)
2369{
2370 struct sdebug_queued_cmd * sqcp;
2371 unsigned long iflags;
2372
2373 if (indx >= scsi_debug_max_queue) {
2374 printk(KERN_ERR "scsi_debug:timer_intr_handler: indx too "
2375 "large\n");
2376 return;
2377 }
2378 spin_lock_irqsave(&queued_arr_lock, iflags);
2379 sqcp = &queued_arr[(int)indx];
2380 if (! sqcp->in_use) {
2381 printk(KERN_ERR "scsi_debug:timer_intr_handler: Unexpected "
2382 "interrupt\n");
2383 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2384 return;
2385 }
2386 sqcp->in_use = 0;
2387 if (sqcp->done_funct) {
2388 sqcp->a_cmnd->result = sqcp->scsi_result;
2389 sqcp->done_funct(sqcp->a_cmnd); /* callback to mid level */
2390 }
2391 sqcp->done_funct = NULL;
2392 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2393}
2394
2395
2396static struct sdebug_dev_info *
2397sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags)
2398{
2399 struct sdebug_dev_info *devip;
2400
2401 devip = kzalloc(sizeof(*devip), flags);
2402 if (devip) {
2403 devip->sdbg_host = sdbg_host;
2404 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
2405 }
2406 return devip;
2407}
2408
2409static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev)
2410{
2411 struct sdebug_host_info * sdbg_host;
2412 struct sdebug_dev_info * open_devip = NULL;
2413 struct sdebug_dev_info * devip =
2414 (struct sdebug_dev_info *)sdev->hostdata;
2415
2416 if (devip)
2417 return devip;
2418 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
2419 if (!sdbg_host) {
2420 printk(KERN_ERR "Host info NULL\n");
2421 return NULL;
2422 }
2423 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
2424 if ((devip->used) && (devip->channel == sdev->channel) &&
2425 (devip->target == sdev->id) &&
2426 (devip->lun == sdev->lun))
2427 return devip;
2428 else {
2429 if ((!devip->used) && (!open_devip))
2430 open_devip = devip;
2431 }
2432 }
2433 if (!open_devip) { /* try and make a new one */
2434 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
2435 if (!open_devip) {
2436 printk(KERN_ERR "%s: out of memory at line %d\n",
2437 __func__, __LINE__);
2438 return NULL;
2439 }
2440 }
2441
2442 open_devip->channel = sdev->channel;
2443 open_devip->target = sdev->id;
2444 open_devip->lun = sdev->lun;
2445 open_devip->sdbg_host = sdbg_host;
2446 open_devip->reset = 1;
2447 open_devip->used = 1;
2448 memset(open_devip->sense_buff, 0, SDEBUG_SENSE_LEN);
2449 if (scsi_debug_dsense)
2450 open_devip->sense_buff[0] = 0x72;
2451 else {
2452 open_devip->sense_buff[0] = 0x70;
2453 open_devip->sense_buff[7] = 0xa;
2454 }
2455 if (sdev->lun == SAM2_WLUN_REPORT_LUNS)
2456 open_devip->wlun = SAM2_WLUN_REPORT_LUNS & 0xff;
2457
2458 return open_devip;
2459}
2460
2461static int scsi_debug_slave_alloc(struct scsi_device *sdp)
2462{
2463 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2464 printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %u>\n",
2465 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
2466 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue);
2467 return 0;
2468}
2469
2470static int scsi_debug_slave_configure(struct scsi_device *sdp)
2471{
2472 struct sdebug_dev_info *devip;
2473
2474 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2475 printk(KERN_INFO "scsi_debug: slave_configure <%u %u %u %u>\n",
2476 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
2477 if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN)
2478 sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN;
2479 devip = devInfoReg(sdp);
2480 if (NULL == devip)
2481 return 1; /* no resources, will be marked offline */
2482 sdp->hostdata = devip;
2483 if (sdp->host->cmd_per_lun)
2484 scsi_adjust_queue_depth(sdp, SDEBUG_TAGGED_QUEUING,
2485 sdp->host->cmd_per_lun);
2486 blk_queue_max_segment_size(sdp->request_queue, 256 * 1024);
2487 if (scsi_debug_no_uld)
2488 sdp->no_uld_attach = 1;
2489 return 0;
2490}
2491
2492static void scsi_debug_slave_destroy(struct scsi_device *sdp)
2493{
2494 struct sdebug_dev_info *devip =
2495 (struct sdebug_dev_info *)sdp->hostdata;
2496
2497 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2498 printk(KERN_INFO "scsi_debug: slave_destroy <%u %u %u %u>\n",
2499 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
2500 if (devip) {
2501 /* make this slot available for re-use */
2502 devip->used = 0;
2503 sdp->hostdata = NULL;
2504 }
2505}
2506
2507/* Returns 1 if found 'cmnd' and deleted its timer. else returns 0 */
2508static int stop_queued_cmnd(struct scsi_cmnd *cmnd)
2509{
2510 unsigned long iflags;
2511 int k;
2512 struct sdebug_queued_cmd *sqcp;
2513
2514 spin_lock_irqsave(&queued_arr_lock, iflags);
2515 for (k = 0; k < scsi_debug_max_queue; ++k) {
2516 sqcp = &queued_arr[k];
2517 if (sqcp->in_use && (cmnd == sqcp->a_cmnd)) {
2518 del_timer_sync(&sqcp->cmnd_timer);
2519 sqcp->in_use = 0;
2520 sqcp->a_cmnd = NULL;
2521 break;
2522 }
2523 }
2524 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2525 return (k < scsi_debug_max_queue) ? 1 : 0;
2526}
2527
2528/* Deletes (stops) timers of all queued commands */
2529static void stop_all_queued(void)
2530{
2531 unsigned long iflags;
2532 int k;
2533 struct sdebug_queued_cmd *sqcp;
2534
2535 spin_lock_irqsave(&queued_arr_lock, iflags);
2536 for (k = 0; k < scsi_debug_max_queue; ++k) {
2537 sqcp = &queued_arr[k];
2538 if (sqcp->in_use && sqcp->a_cmnd) {
2539 del_timer_sync(&sqcp->cmnd_timer);
2540 sqcp->in_use = 0;
2541 sqcp->a_cmnd = NULL;
2542 }
2543 }
2544 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2545}
2546
2547static int scsi_debug_abort(struct scsi_cmnd * SCpnt)
2548{
2549 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2550 printk(KERN_INFO "scsi_debug: abort\n");
2551 ++num_aborts;
2552 stop_queued_cmnd(SCpnt);
2553 return SUCCESS;
2554}
2555
2556static int scsi_debug_biosparam(struct scsi_device *sdev,
2557 struct block_device * bdev, sector_t capacity, int *info)
2558{
2559 int res;
2560 unsigned char *buf;
2561
2562 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2563 printk(KERN_INFO "scsi_debug: biosparam\n");
2564 buf = scsi_bios_ptable(bdev);
2565 if (buf) {
2566 res = scsi_partsize(buf, capacity,
2567 &info[2], &info[0], &info[1]);
2568 kfree(buf);
2569 if (! res)
2570 return res;
2571 }
2572 info[0] = sdebug_heads;
2573 info[1] = sdebug_sectors_per;
2574 info[2] = sdebug_cylinders_per;
2575 return 0;
2576}
2577
2578static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
2579{
2580 struct sdebug_dev_info * devip;
2581
2582 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2583 printk(KERN_INFO "scsi_debug: device_reset\n");
2584 ++num_dev_resets;
2585 if (SCpnt) {
2586 devip = devInfoReg(SCpnt->device);
2587 if (devip)
2588 devip->reset = 1;
2589 }
2590 return SUCCESS;
2591}
2592
2593static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
2594{
2595 struct sdebug_host_info *sdbg_host;
2596 struct sdebug_dev_info * dev_info;
2597 struct scsi_device * sdp;
2598 struct Scsi_Host * hp;
2599
2600 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2601 printk(KERN_INFO "scsi_debug: bus_reset\n");
2602 ++num_bus_resets;
2603 if (SCpnt && ((sdp = SCpnt->device)) && ((hp = sdp->host))) {
2604 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
2605 if (sdbg_host) {
2606 list_for_each_entry(dev_info,
2607 &sdbg_host->dev_info_list,
2608 dev_list)
2609 dev_info->reset = 1;
2610 }
2611 }
2612 return SUCCESS;
2613}
2614
2615static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
2616{
2617 struct sdebug_host_info * sdbg_host;
2618 struct sdebug_dev_info * dev_info;
2619
2620 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2621 printk(KERN_INFO "scsi_debug: host_reset\n");
2622 ++num_host_resets;
2623 spin_lock(&sdebug_host_list_lock);
2624 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
2625 list_for_each_entry(dev_info, &sdbg_host->dev_info_list,
2626 dev_list)
2627 dev_info->reset = 1;
2628 }
2629 spin_unlock(&sdebug_host_list_lock);
2630 stop_all_queued();
2631 return SUCCESS;
2632}
2633
2634/* Initializes timers in queued array */
2635static void __init init_all_queued(void)
2636{
2637 unsigned long iflags;
2638 int k;
2639 struct sdebug_queued_cmd * sqcp;
2640
2641 spin_lock_irqsave(&queued_arr_lock, iflags);
2642 for (k = 0; k < scsi_debug_max_queue; ++k) {
2643 sqcp = &queued_arr[k];
2644 init_timer(&sqcp->cmnd_timer);
2645 sqcp->in_use = 0;
2646 sqcp->a_cmnd = NULL;
2647 }
2648 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2649}
2650
2651static void __init sdebug_build_parts(unsigned char *ramp,
2652 unsigned long store_size)
2653{
2654 struct partition * pp;
2655 int starts[SDEBUG_MAX_PARTS + 2];
2656 int sectors_per_part, num_sectors, k;
2657 int heads_by_sects, start_sec, end_sec;
2658
2659 /* assume partition table already zeroed */
2660 if ((scsi_debug_num_parts < 1) || (store_size < 1048576))
2661 return;
2662 if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) {
2663 scsi_debug_num_parts = SDEBUG_MAX_PARTS;
2664 printk(KERN_WARNING "scsi_debug:build_parts: reducing "
2665 "partitions to %d\n", SDEBUG_MAX_PARTS);
2666 }
2667 num_sectors = (int)sdebug_store_sectors;
2668 sectors_per_part = (num_sectors - sdebug_sectors_per)
2669 / scsi_debug_num_parts;
2670 heads_by_sects = sdebug_heads * sdebug_sectors_per;
2671 starts[0] = sdebug_sectors_per;
2672 for (k = 1; k < scsi_debug_num_parts; ++k)
2673 starts[k] = ((k * sectors_per_part) / heads_by_sects)
2674 * heads_by_sects;
2675 starts[scsi_debug_num_parts] = num_sectors;
2676 starts[scsi_debug_num_parts + 1] = 0;
2677
2678 ramp[510] = 0x55; /* magic partition markings */
2679 ramp[511] = 0xAA;
2680 pp = (struct partition *)(ramp + 0x1be);
2681 for (k = 0; starts[k + 1]; ++k, ++pp) {
2682 start_sec = starts[k];
2683 end_sec = starts[k + 1] - 1;
2684 pp->boot_ind = 0;
2685
2686 pp->cyl = start_sec / heads_by_sects;
2687 pp->head = (start_sec - (pp->cyl * heads_by_sects))
2688 / sdebug_sectors_per;
2689 pp->sector = (start_sec % sdebug_sectors_per) + 1;
2690
2691 pp->end_cyl = end_sec / heads_by_sects;
2692 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
2693 / sdebug_sectors_per;
2694 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
2695
2696 pp->start_sect = cpu_to_le32(start_sec);
2697 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
2698 pp->sys_ind = 0x83; /* plain Linux partition */
2699 }
2700}
2701
2702static int schedule_resp(struct scsi_cmnd * cmnd,
2703 struct sdebug_dev_info * devip,
2704 done_funct_t done, int scsi_result, int delta_jiff)
2705{
2706 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmnd) {
2707 if (scsi_result) {
2708 struct scsi_device * sdp = cmnd->device;
2709
2710 printk(KERN_INFO "scsi_debug: <%u %u %u %u> "
2711 "non-zero result=0x%x\n", sdp->host->host_no,
2712 sdp->channel, sdp->id, sdp->lun, scsi_result);
2713 }
2714 }
2715 if (cmnd && devip) {
2716 /* simulate autosense by this driver */
2717 if (SAM_STAT_CHECK_CONDITION == (scsi_result & 0xff))
2718 memcpy(cmnd->sense_buffer, devip->sense_buff,
2719 (SCSI_SENSE_BUFFERSIZE > SDEBUG_SENSE_LEN) ?
2720 SDEBUG_SENSE_LEN : SCSI_SENSE_BUFFERSIZE);
2721 }
2722 if (delta_jiff <= 0) {
2723 if (cmnd)
2724 cmnd->result = scsi_result;
2725 if (done)
2726 done(cmnd);
2727 return 0;
2728 } else {
2729 unsigned long iflags;
2730 int k;
2731 struct sdebug_queued_cmd * sqcp = NULL;
2732
2733 spin_lock_irqsave(&queued_arr_lock, iflags);
2734 for (k = 0; k < scsi_debug_max_queue; ++k) {
2735 sqcp = &queued_arr[k];
2736 if (! sqcp->in_use)
2737 break;
2738 }
2739 if (k >= scsi_debug_max_queue) {
2740 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2741 printk(KERN_WARNING "scsi_debug: can_queue exceeded\n");
2742 return 1; /* report busy to mid level */
2743 }
2744 sqcp->in_use = 1;
2745 sqcp->a_cmnd = cmnd;
2746 sqcp->scsi_result = scsi_result;
2747 sqcp->done_funct = done;
2748 sqcp->cmnd_timer.function = timer_intr_handler;
2749 sqcp->cmnd_timer.data = k;
2750 sqcp->cmnd_timer.expires = jiffies + delta_jiff;
2751 add_timer(&sqcp->cmnd_timer);
2752 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2753 if (cmnd)
2754 cmnd->result = 0;
2755 return 0;
2756 }
2757}
2758/* Note: The following macros create attribute files in the
2759 /sys/module/scsi_debug/parameters directory. Unfortunately this
2760 driver is unaware of a change and cannot trigger auxiliary actions
2761 as it can when the corresponding attribute in the
2762 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
2763 */
2764module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR);
2765module_param_named(ato, scsi_debug_ato, int, S_IRUGO);
2766module_param_named(clustering, scsi_debug_clustering, bool, S_IRUGO | S_IWUSR);
2767module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR);
2768module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO);
2769module_param_named(dif, scsi_debug_dif, int, S_IRUGO);
2770module_param_named(dix, scsi_debug_dix, int, S_IRUGO);
2771module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR);
2772module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR);
2773module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR);
2774module_param_named(guard, scsi_debug_guard, uint, S_IRUGO);
2775module_param_named(lbpu, scsi_debug_lbpu, int, S_IRUGO);
2776module_param_named(lbpws, scsi_debug_lbpws, int, S_IRUGO);
2777module_param_named(lbpws10, scsi_debug_lbpws10, int, S_IRUGO);
2778module_param_named(lbprz, scsi_debug_lbprz, int, S_IRUGO);
2779module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO);
2780module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR);
2781module_param_named(max_queue, scsi_debug_max_queue, int, S_IRUGO | S_IWUSR);
2782module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR);
2783module_param_named(no_uld, scsi_debug_no_uld, int, S_IRUGO);
2784module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO);
2785module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR);
2786module_param_named(opt_blks, scsi_debug_opt_blks, int, S_IRUGO);
2787module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR);
2788module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO);
2789module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR);
2790module_param_named(removable, scsi_debug_removable, bool, S_IRUGO | S_IWUSR);
2791module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO);
2792module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO);
2793module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO);
2794module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO);
2795module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO);
2796module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, int, S_IRUGO);
2797module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR);
2798module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int,
2799 S_IRUGO | S_IWUSR);
2800module_param_named(write_same_length, scsi_debug_write_same_length, int,
2801 S_IRUGO | S_IWUSR);
2802
2803MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
2804MODULE_DESCRIPTION("SCSI debug adapter driver");
2805MODULE_LICENSE("GPL");
2806MODULE_VERSION(SCSI_DEBUG_VERSION);
2807
2808MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
2809MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
2810MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
2811MODULE_PARM_DESC(delay, "# of jiffies to delay response(def=1)");
2812MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs(def=8)");
2813MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
2814MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
2815MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
2816MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
2817MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
2818MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
2819MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
2820MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
2821MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
2822MODULE_PARM_DESC(lbprz, "unmapped blocks return 0 on read (def=1)");
2823MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
2824MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
2825MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to 255(def))");
2826MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
2827MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
2828MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
2829MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
2830MODULE_PARM_DESC(opt_blks, "optimal transfer length in block (def=64)");
2831MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
2832MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
2833MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
2834MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
2835MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])");
2836MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
2837MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
2838MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
2839MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
2840MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
2841MODULE_PARM_DESC(virtual_gb, "virtual gigabyte size (def=0 -> use dev_size_mb)");
2842MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
2843MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
2844
2845static char sdebug_info[256];
2846
2847static const char * scsi_debug_info(struct Scsi_Host * shp)
2848{
2849 sprintf(sdebug_info, "scsi_debug, version %s [%s], "
2850 "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION,
2851 scsi_debug_version_date, scsi_debug_dev_size_mb,
2852 scsi_debug_opts);
2853 return sdebug_info;
2854}
2855
2856/* scsi_debug_proc_info
2857 * Used if the driver currently has no own support for /proc/scsi
2858 */
2859static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer, int length)
2860{
2861 char arr[16];
2862 int opts;
2863 int minLen = length > 15 ? 15 : length;
2864
2865 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
2866 return -EACCES;
2867 memcpy(arr, buffer, minLen);
2868 arr[minLen] = '\0';
2869 if (1 != sscanf(arr, "%d", &opts))
2870 return -EINVAL;
2871 scsi_debug_opts = opts;
2872 if (scsi_debug_every_nth != 0)
2873 scsi_debug_cmnd_count = 0;
2874 return length;
2875}
2876
2877static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
2878{
2879 seq_printf(m, "scsi_debug adapter driver, version "
2880 "%s [%s]\n"
2881 "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, "
2882 "every_nth=%d(curr:%d)\n"
2883 "delay=%d, max_luns=%d, scsi_level=%d\n"
2884 "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n"
2885 "number of aborts=%d, device_reset=%d, bus_resets=%d, "
2886 "host_resets=%d\ndix_reads=%d dix_writes=%d dif_errors=%d\n",
2887 SCSI_DEBUG_VERSION, scsi_debug_version_date, scsi_debug_num_tgts,
2888 scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth,
2889 scsi_debug_cmnd_count, scsi_debug_delay,
2890 scsi_debug_max_luns, scsi_debug_scsi_level,
2891 scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads,
2892 sdebug_sectors_per, num_aborts, num_dev_resets, num_bus_resets,
2893 num_host_resets, dix_reads, dix_writes, dif_errors);
2894 return 0;
2895}
2896
2897static ssize_t delay_show(struct device_driver *ddp, char *buf)
2898{
2899 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay);
2900}
2901
2902static ssize_t delay_store(struct device_driver *ddp, const char *buf,
2903 size_t count)
2904{
2905 int delay;
2906 char work[20];
2907
2908 if (1 == sscanf(buf, "%10s", work)) {
2909 if ((1 == sscanf(work, "%d", &delay)) && (delay >= 0)) {
2910 scsi_debug_delay = delay;
2911 return count;
2912 }
2913 }
2914 return -EINVAL;
2915}
2916static DRIVER_ATTR_RW(delay);
2917
2918static ssize_t opts_show(struct device_driver *ddp, char *buf)
2919{
2920 return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts);
2921}
2922
2923static ssize_t opts_store(struct device_driver *ddp, const char *buf,
2924 size_t count)
2925{
2926 int opts;
2927 char work[20];
2928
2929 if (1 == sscanf(buf, "%10s", work)) {
2930 if (0 == strnicmp(work,"0x", 2)) {
2931 if (1 == sscanf(&work[2], "%x", &opts))
2932 goto opts_done;
2933 } else {
2934 if (1 == sscanf(work, "%d", &opts))
2935 goto opts_done;
2936 }
2937 }
2938 return -EINVAL;
2939opts_done:
2940 scsi_debug_opts = opts;
2941 scsi_debug_cmnd_count = 0;
2942 return count;
2943}
2944static DRIVER_ATTR_RW(opts);
2945
2946static ssize_t ptype_show(struct device_driver *ddp, char *buf)
2947{
2948 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype);
2949}
2950static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
2951 size_t count)
2952{
2953 int n;
2954
2955 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2956 scsi_debug_ptype = n;
2957 return count;
2958 }
2959 return -EINVAL;
2960}
2961static DRIVER_ATTR_RW(ptype);
2962
2963static ssize_t dsense_show(struct device_driver *ddp, char *buf)
2964{
2965 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense);
2966}
2967static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
2968 size_t count)
2969{
2970 int n;
2971
2972 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2973 scsi_debug_dsense = n;
2974 return count;
2975 }
2976 return -EINVAL;
2977}
2978static DRIVER_ATTR_RW(dsense);
2979
2980static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
2981{
2982 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw);
2983}
2984static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
2985 size_t count)
2986{
2987 int n;
2988
2989 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2990 scsi_debug_fake_rw = n;
2991 return count;
2992 }
2993 return -EINVAL;
2994}
2995static DRIVER_ATTR_RW(fake_rw);
2996
2997static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
2998{
2999 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0);
3000}
3001static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
3002 size_t count)
3003{
3004 int n;
3005
3006 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3007 scsi_debug_no_lun_0 = n;
3008 return count;
3009 }
3010 return -EINVAL;
3011}
3012static DRIVER_ATTR_RW(no_lun_0);
3013
3014static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
3015{
3016 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts);
3017}
3018static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
3019 size_t count)
3020{
3021 int n;
3022
3023 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3024 scsi_debug_num_tgts = n;
3025 sdebug_max_tgts_luns();
3026 return count;
3027 }
3028 return -EINVAL;
3029}
3030static DRIVER_ATTR_RW(num_tgts);
3031
3032static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
3033{
3034 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb);
3035}
3036static DRIVER_ATTR_RO(dev_size_mb);
3037
3038static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
3039{
3040 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts);
3041}
3042static DRIVER_ATTR_RO(num_parts);
3043
3044static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
3045{
3046 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth);
3047}
3048static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
3049 size_t count)
3050{
3051 int nth;
3052
3053 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
3054 scsi_debug_every_nth = nth;
3055 scsi_debug_cmnd_count = 0;
3056 return count;
3057 }
3058 return -EINVAL;
3059}
3060static DRIVER_ATTR_RW(every_nth);
3061
3062static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
3063{
3064 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns);
3065}
3066static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
3067 size_t count)
3068{
3069 int n;
3070
3071 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3072 scsi_debug_max_luns = n;
3073 sdebug_max_tgts_luns();
3074 return count;
3075 }
3076 return -EINVAL;
3077}
3078static DRIVER_ATTR_RW(max_luns);
3079
3080static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
3081{
3082 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_queue);
3083}
3084static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
3085 size_t count)
3086{
3087 int n;
3088
3089 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
3090 (n <= SCSI_DEBUG_CANQUEUE)) {
3091 scsi_debug_max_queue = n;
3092 return count;
3093 }
3094 return -EINVAL;
3095}
3096static DRIVER_ATTR_RW(max_queue);
3097
3098static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
3099{
3100 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_uld);
3101}
3102static DRIVER_ATTR_RO(no_uld);
3103
3104static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
3105{
3106 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level);
3107}
3108static DRIVER_ATTR_RO(scsi_level);
3109
3110static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
3111{
3112 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb);
3113}
3114static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
3115 size_t count)
3116{
3117 int n;
3118
3119 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3120 scsi_debug_virtual_gb = n;
3121
3122 sdebug_capacity = get_sdebug_capacity();
3123
3124 return count;
3125 }
3126 return -EINVAL;
3127}
3128static DRIVER_ATTR_RW(virtual_gb);
3129
3130static ssize_t add_host_show(struct device_driver *ddp, char *buf)
3131{
3132 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host);
3133}
3134
3135static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
3136 size_t count)
3137{
3138 int delta_hosts;
3139
3140 if (sscanf(buf, "%d", &delta_hosts) != 1)
3141 return -EINVAL;
3142 if (delta_hosts > 0) {
3143 do {
3144 sdebug_add_adapter();
3145 } while (--delta_hosts);
3146 } else if (delta_hosts < 0) {
3147 do {
3148 sdebug_remove_adapter();
3149 } while (++delta_hosts);
3150 }
3151 return count;
3152}
3153static DRIVER_ATTR_RW(add_host);
3154
3155static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
3156{
3157 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_vpd_use_hostno);
3158}
3159static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
3160 size_t count)
3161{
3162 int n;
3163
3164 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3165 scsi_debug_vpd_use_hostno = n;
3166 return count;
3167 }
3168 return -EINVAL;
3169}
3170static DRIVER_ATTR_RW(vpd_use_hostno);
3171
3172static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
3173{
3174 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size);
3175}
3176static DRIVER_ATTR_RO(sector_size);
3177
3178static ssize_t dix_show(struct device_driver *ddp, char *buf)
3179{
3180 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix);
3181}
3182static DRIVER_ATTR_RO(dix);
3183
3184static ssize_t dif_show(struct device_driver *ddp, char *buf)
3185{
3186 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif);
3187}
3188static DRIVER_ATTR_RO(dif);
3189
3190static ssize_t guard_show(struct device_driver *ddp, char *buf)
3191{
3192 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_guard);
3193}
3194static DRIVER_ATTR_RO(guard);
3195
3196static ssize_t ato_show(struct device_driver *ddp, char *buf)
3197{
3198 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato);
3199}
3200static DRIVER_ATTR_RO(ato);
3201
3202static ssize_t map_show(struct device_driver *ddp, char *buf)
3203{
3204 ssize_t count;
3205
3206 if (!scsi_debug_lbp())
3207 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
3208 sdebug_store_sectors);
3209
3210 count = bitmap_scnlistprintf(buf, PAGE_SIZE, map_storep, map_size);
3211
3212 buf[count++] = '\n';
3213 buf[count++] = 0;
3214
3215 return count;
3216}
3217static DRIVER_ATTR_RO(map);
3218
3219static ssize_t removable_show(struct device_driver *ddp, char *buf)
3220{
3221 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_removable ? 1 : 0);
3222}
3223static ssize_t removable_store(struct device_driver *ddp, const char *buf,
3224 size_t count)
3225{
3226 int n;
3227
3228 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3229 scsi_debug_removable = (n > 0);
3230 return count;
3231 }
3232 return -EINVAL;
3233}
3234static DRIVER_ATTR_RW(removable);
3235
3236/* Note: The following array creates attribute files in the
3237 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
3238 files (over those found in the /sys/module/scsi_debug/parameters
3239 directory) is that auxiliary actions can be triggered when an attribute
3240 is changed. For example see: sdebug_add_host_store() above.
3241 */
3242
3243static struct attribute *sdebug_drv_attrs[] = {
3244 &driver_attr_delay.attr,
3245 &driver_attr_opts.attr,
3246 &driver_attr_ptype.attr,
3247 &driver_attr_dsense.attr,
3248 &driver_attr_fake_rw.attr,
3249 &driver_attr_no_lun_0.attr,
3250 &driver_attr_num_tgts.attr,
3251 &driver_attr_dev_size_mb.attr,
3252 &driver_attr_num_parts.attr,
3253 &driver_attr_every_nth.attr,
3254 &driver_attr_max_luns.attr,
3255 &driver_attr_max_queue.attr,
3256 &driver_attr_no_uld.attr,
3257 &driver_attr_scsi_level.attr,
3258 &driver_attr_virtual_gb.attr,
3259 &driver_attr_add_host.attr,
3260 &driver_attr_vpd_use_hostno.attr,
3261 &driver_attr_sector_size.attr,
3262 &driver_attr_dix.attr,
3263 &driver_attr_dif.attr,
3264 &driver_attr_guard.attr,
3265 &driver_attr_ato.attr,
3266 &driver_attr_map.attr,
3267 &driver_attr_removable.attr,
3268 NULL,
3269};
3270ATTRIBUTE_GROUPS(sdebug_drv);
3271
3272static struct device *pseudo_primary;
3273
3274static int __init scsi_debug_init(void)
3275{
3276 unsigned long sz;
3277 int host_to_add;
3278 int k;
3279 int ret;
3280
3281 switch (scsi_debug_sector_size) {
3282 case 512:
3283 case 1024:
3284 case 2048:
3285 case 4096:
3286 break;
3287 default:
3288 printk(KERN_ERR "scsi_debug_init: invalid sector_size %d\n",
3289 scsi_debug_sector_size);
3290 return -EINVAL;
3291 }
3292
3293 switch (scsi_debug_dif) {
3294
3295 case SD_DIF_TYPE0_PROTECTION:
3296 case SD_DIF_TYPE1_PROTECTION:
3297 case SD_DIF_TYPE2_PROTECTION:
3298 case SD_DIF_TYPE3_PROTECTION:
3299 break;
3300
3301 default:
3302 printk(KERN_ERR "scsi_debug_init: dif must be 0, 1, 2 or 3\n");
3303 return -EINVAL;
3304 }
3305
3306 if (scsi_debug_guard > 1) {
3307 printk(KERN_ERR "scsi_debug_init: guard must be 0 or 1\n");
3308 return -EINVAL;
3309 }
3310
3311 if (scsi_debug_ato > 1) {
3312 printk(KERN_ERR "scsi_debug_init: ato must be 0 or 1\n");
3313 return -EINVAL;
3314 }
3315
3316 if (scsi_debug_physblk_exp > 15) {
3317 printk(KERN_ERR "scsi_debug_init: invalid physblk_exp %u\n",
3318 scsi_debug_physblk_exp);
3319 return -EINVAL;
3320 }
3321
3322 if (scsi_debug_lowest_aligned > 0x3fff) {
3323 printk(KERN_ERR "scsi_debug_init: lowest_aligned too big: %u\n",
3324 scsi_debug_lowest_aligned);
3325 return -EINVAL;
3326 }
3327
3328 if (scsi_debug_dev_size_mb < 1)
3329 scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
3330 sz = (unsigned long)scsi_debug_dev_size_mb * 1048576;
3331 sdebug_store_sectors = sz / scsi_debug_sector_size;
3332 sdebug_capacity = get_sdebug_capacity();
3333
3334 /* play around with geometry, don't waste too much on track 0 */
3335 sdebug_heads = 8;
3336 sdebug_sectors_per = 32;
3337 if (scsi_debug_dev_size_mb >= 16)
3338 sdebug_heads = 32;
3339 else if (scsi_debug_dev_size_mb >= 256)
3340 sdebug_heads = 64;
3341 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
3342 (sdebug_sectors_per * sdebug_heads);
3343 if (sdebug_cylinders_per >= 1024) {
3344 /* other LLDs do this; implies >= 1GB ram disk ... */
3345 sdebug_heads = 255;
3346 sdebug_sectors_per = 63;
3347 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
3348 (sdebug_sectors_per * sdebug_heads);
3349 }
3350
3351 fake_storep = vmalloc(sz);
3352 if (NULL == fake_storep) {
3353 printk(KERN_ERR "scsi_debug_init: out of memory, 1\n");
3354 return -ENOMEM;
3355 }
3356 memset(fake_storep, 0, sz);
3357 if (scsi_debug_num_parts > 0)
3358 sdebug_build_parts(fake_storep, sz);
3359
3360 if (scsi_debug_dix) {
3361 int dif_size;
3362
3363 dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple);
3364 dif_storep = vmalloc(dif_size);
3365
3366 printk(KERN_ERR "scsi_debug_init: dif_storep %u bytes @ %p\n",
3367 dif_size, dif_storep);
3368
3369 if (dif_storep == NULL) {
3370 printk(KERN_ERR "scsi_debug_init: out of mem. (DIX)\n");
3371 ret = -ENOMEM;
3372 goto free_vm;
3373 }
3374
3375 memset(dif_storep, 0xff, dif_size);
3376 }
3377
3378 /* Logical Block Provisioning */
3379 if (scsi_debug_lbp()) {
3380 scsi_debug_unmap_max_blocks =
3381 clamp(scsi_debug_unmap_max_blocks, 0U, 0xffffffffU);
3382
3383 scsi_debug_unmap_max_desc =
3384 clamp(scsi_debug_unmap_max_desc, 0U, 256U);
3385
3386 scsi_debug_unmap_granularity =
3387 clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU);
3388
3389 if (scsi_debug_unmap_alignment &&
3390 scsi_debug_unmap_granularity <=
3391 scsi_debug_unmap_alignment) {
3392 printk(KERN_ERR
3393 "%s: ERR: unmap_granularity <= unmap_alignment\n",
3394 __func__);
3395 return -EINVAL;
3396 }
3397
3398 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
3399 map_storep = vmalloc(BITS_TO_LONGS(map_size) * sizeof(long));
3400
3401 printk(KERN_INFO "scsi_debug_init: %lu provisioning blocks\n",
3402 map_size);
3403
3404 if (map_storep == NULL) {
3405 printk(KERN_ERR "scsi_debug_init: out of mem. (MAP)\n");
3406 ret = -ENOMEM;
3407 goto free_vm;
3408 }
3409
3410 bitmap_zero(map_storep, map_size);
3411
3412 /* Map first 1KB for partition table */
3413 if (scsi_debug_num_parts)
3414 map_region(0, 2);
3415 }
3416
3417 pseudo_primary = root_device_register("pseudo_0");
3418 if (IS_ERR(pseudo_primary)) {
3419 printk(KERN_WARNING "scsi_debug: root_device_register() error\n");
3420 ret = PTR_ERR(pseudo_primary);
3421 goto free_vm;
3422 }
3423 ret = bus_register(&pseudo_lld_bus);
3424 if (ret < 0) {
3425 printk(KERN_WARNING "scsi_debug: bus_register error: %d\n",
3426 ret);
3427 goto dev_unreg;
3428 }
3429 ret = driver_register(&sdebug_driverfs_driver);
3430 if (ret < 0) {
3431 printk(KERN_WARNING "scsi_debug: driver_register error: %d\n",
3432 ret);
3433 goto bus_unreg;
3434 }
3435
3436 init_all_queued();
3437
3438 host_to_add = scsi_debug_add_host;
3439 scsi_debug_add_host = 0;
3440
3441 for (k = 0; k < host_to_add; k++) {
3442 if (sdebug_add_adapter()) {
3443 printk(KERN_ERR "scsi_debug_init: "
3444 "sdebug_add_adapter failed k=%d\n", k);
3445 break;
3446 }
3447 }
3448
3449 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
3450 printk(KERN_INFO "scsi_debug_init: built %d host(s)\n",
3451 scsi_debug_add_host);
3452 }
3453 return 0;
3454
3455bus_unreg:
3456 bus_unregister(&pseudo_lld_bus);
3457dev_unreg:
3458 root_device_unregister(pseudo_primary);
3459free_vm:
3460 if (map_storep)
3461 vfree(map_storep);
3462 if (dif_storep)
3463 vfree(dif_storep);
3464 vfree(fake_storep);
3465
3466 return ret;
3467}
3468
3469static void __exit scsi_debug_exit(void)
3470{
3471 int k = scsi_debug_add_host;
3472
3473 stop_all_queued();
3474 for (; k; k--)
3475 sdebug_remove_adapter();
3476 driver_unregister(&sdebug_driverfs_driver);
3477 bus_unregister(&pseudo_lld_bus);
3478 root_device_unregister(pseudo_primary);
3479
3480 if (dif_storep)
3481 vfree(dif_storep);
3482
3483 vfree(fake_storep);
3484}
3485
3486device_initcall(scsi_debug_init);
3487module_exit(scsi_debug_exit);
3488
3489static void sdebug_release_adapter(struct device * dev)
3490{
3491 struct sdebug_host_info *sdbg_host;
3492
3493 sdbg_host = to_sdebug_host(dev);
3494 kfree(sdbg_host);
3495}
3496
3497static int sdebug_add_adapter(void)
3498{
3499 int k, devs_per_host;
3500 int error = 0;
3501 struct sdebug_host_info *sdbg_host;
3502 struct sdebug_dev_info *sdbg_devinfo, *tmp;
3503
3504 sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL);
3505 if (NULL == sdbg_host) {
3506 printk(KERN_ERR "%s: out of memory at line %d\n",
3507 __func__, __LINE__);
3508 return -ENOMEM;
3509 }
3510
3511 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
3512
3513 devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns;
3514 for (k = 0; k < devs_per_host; k++) {
3515 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
3516 if (!sdbg_devinfo) {
3517 printk(KERN_ERR "%s: out of memory at line %d\n",
3518 __func__, __LINE__);
3519 error = -ENOMEM;
3520 goto clean;
3521 }
3522 }
3523
3524 spin_lock(&sdebug_host_list_lock);
3525 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
3526 spin_unlock(&sdebug_host_list_lock);
3527
3528 sdbg_host->dev.bus = &pseudo_lld_bus;
3529 sdbg_host->dev.parent = pseudo_primary;
3530 sdbg_host->dev.release = &sdebug_release_adapter;
3531 dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host);
3532
3533 error = device_register(&sdbg_host->dev);
3534
3535 if (error)
3536 goto clean;
3537
3538 ++scsi_debug_add_host;
3539 return error;
3540
3541clean:
3542 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
3543 dev_list) {
3544 list_del(&sdbg_devinfo->dev_list);
3545 kfree(sdbg_devinfo);
3546 }
3547
3548 kfree(sdbg_host);
3549 return error;
3550}
3551
3552static void sdebug_remove_adapter(void)
3553{
3554 struct sdebug_host_info * sdbg_host = NULL;
3555
3556 spin_lock(&sdebug_host_list_lock);
3557 if (!list_empty(&sdebug_host_list)) {
3558 sdbg_host = list_entry(sdebug_host_list.prev,
3559 struct sdebug_host_info, host_list);
3560 list_del(&sdbg_host->host_list);
3561 }
3562 spin_unlock(&sdebug_host_list_lock);
3563
3564 if (!sdbg_host)
3565 return;
3566
3567 device_unregister(&sdbg_host->dev);
3568 --scsi_debug_add_host;
3569}
3570
3571static
3572int scsi_debug_queuecommand_lck(struct scsi_cmnd *SCpnt, done_funct_t done)
3573{
3574 unsigned char *cmd = (unsigned char *) SCpnt->cmnd;
3575 int len, k;
3576 unsigned int num;
3577 unsigned long long lba;
3578 u32 ei_lba;
3579 int errsts = 0;
3580 int target = SCpnt->device->id;
3581 struct sdebug_dev_info *devip = NULL;
3582 int inj_recovered = 0;
3583 int inj_transport = 0;
3584 int inj_dif = 0;
3585 int inj_dix = 0;
3586 int delay_override = 0;
3587 int unmap = 0;
3588
3589 scsi_set_resid(SCpnt, 0);
3590 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmd) {
3591 printk(KERN_INFO "scsi_debug: cmd ");
3592 for (k = 0, len = SCpnt->cmd_len; k < len; ++k)
3593 printk("%02x ", (int)cmd[k]);
3594 printk("\n");
3595 }
3596
3597 if (target == SCpnt->device->host->hostt->this_id) {
3598 printk(KERN_INFO "scsi_debug: initiator's id used as "
3599 "target!\n");
3600 return schedule_resp(SCpnt, NULL, done,
3601 DID_NO_CONNECT << 16, 0);
3602 }
3603
3604 if ((SCpnt->device->lun >= scsi_debug_max_luns) &&
3605 (SCpnt->device->lun != SAM2_WLUN_REPORT_LUNS))
3606 return schedule_resp(SCpnt, NULL, done,
3607 DID_NO_CONNECT << 16, 0);
3608 devip = devInfoReg(SCpnt->device);
3609 if (NULL == devip)
3610 return schedule_resp(SCpnt, NULL, done,
3611 DID_NO_CONNECT << 16, 0);
3612
3613 if ((scsi_debug_every_nth != 0) &&
3614 (++scsi_debug_cmnd_count >= abs(scsi_debug_every_nth))) {
3615 scsi_debug_cmnd_count = 0;
3616 if (scsi_debug_every_nth < -1)
3617 scsi_debug_every_nth = -1;
3618 if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts)
3619 return 0; /* ignore command causing timeout */
3620 else if (SCSI_DEBUG_OPT_MAC_TIMEOUT & scsi_debug_opts &&
3621 scsi_medium_access_command(SCpnt))
3622 return 0; /* time out reads and writes */
3623 else if (SCSI_DEBUG_OPT_RECOVERED_ERR & scsi_debug_opts)
3624 inj_recovered = 1; /* to reads and writes below */
3625 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & scsi_debug_opts)
3626 inj_transport = 1; /* to reads and writes below */
3627 else if (SCSI_DEBUG_OPT_DIF_ERR & scsi_debug_opts)
3628 inj_dif = 1; /* to reads and writes below */
3629 else if (SCSI_DEBUG_OPT_DIX_ERR & scsi_debug_opts)
3630 inj_dix = 1; /* to reads and writes below */
3631 }
3632
3633 if (devip->wlun) {
3634 switch (*cmd) {
3635 case INQUIRY:
3636 case REQUEST_SENSE:
3637 case TEST_UNIT_READY:
3638 case REPORT_LUNS:
3639 break; /* only allowable wlun commands */
3640 default:
3641 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3642 printk(KERN_INFO "scsi_debug: Opcode: 0x%x "
3643 "not supported for wlun\n", *cmd);
3644 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3645 INVALID_OPCODE, 0);
3646 errsts = check_condition_result;
3647 return schedule_resp(SCpnt, devip, done, errsts,
3648 0);
3649 }
3650 }
3651
3652 switch (*cmd) {
3653 case INQUIRY: /* mandatory, ignore unit attention */
3654 delay_override = 1;
3655 errsts = resp_inquiry(SCpnt, target, devip);
3656 break;
3657 case REQUEST_SENSE: /* mandatory, ignore unit attention */
3658 delay_override = 1;
3659 errsts = resp_requests(SCpnt, devip);
3660 break;
3661 case REZERO_UNIT: /* actually this is REWIND for SSC */
3662 case START_STOP:
3663 errsts = resp_start_stop(SCpnt, devip);
3664 break;
3665 case ALLOW_MEDIUM_REMOVAL:
3666 errsts = check_readiness(SCpnt, 1, devip);
3667 if (errsts)
3668 break;
3669 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3670 printk(KERN_INFO "scsi_debug: Medium removal %s\n",
3671 cmd[4] ? "inhibited" : "enabled");
3672 break;
3673 case SEND_DIAGNOSTIC: /* mandatory */
3674 errsts = check_readiness(SCpnt, 1, devip);
3675 break;
3676 case TEST_UNIT_READY: /* mandatory */
3677 delay_override = 1;
3678 errsts = check_readiness(SCpnt, 0, devip);
3679 break;
3680 case RESERVE:
3681 errsts = check_readiness(SCpnt, 1, devip);
3682 break;
3683 case RESERVE_10:
3684 errsts = check_readiness(SCpnt, 1, devip);
3685 break;
3686 case RELEASE:
3687 errsts = check_readiness(SCpnt, 1, devip);
3688 break;
3689 case RELEASE_10:
3690 errsts = check_readiness(SCpnt, 1, devip);
3691 break;
3692 case READ_CAPACITY:
3693 errsts = resp_readcap(SCpnt, devip);
3694 break;
3695 case SERVICE_ACTION_IN:
3696 if (cmd[1] == SAI_READ_CAPACITY_16)
3697 errsts = resp_readcap16(SCpnt, devip);
3698 else if (cmd[1] == SAI_GET_LBA_STATUS) {
3699
3700 if (scsi_debug_lbp() == 0) {
3701 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3702 INVALID_COMMAND_OPCODE, 0);
3703 errsts = check_condition_result;
3704 } else
3705 errsts = resp_get_lba_status(SCpnt, devip);
3706 } else {
3707 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3708 INVALID_OPCODE, 0);
3709 errsts = check_condition_result;
3710 }
3711 break;
3712 case MAINTENANCE_IN:
3713 if (MI_REPORT_TARGET_PGS != cmd[1]) {
3714 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3715 INVALID_OPCODE, 0);
3716 errsts = check_condition_result;
3717 break;
3718 }
3719 errsts = resp_report_tgtpgs(SCpnt, devip);
3720 break;
3721 case READ_16:
3722 case READ_12:
3723 case READ_10:
3724 /* READ{10,12,16} and DIF Type 2 are natural enemies */
3725 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
3726 cmd[1] & 0xe0) {
3727 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3728 INVALID_COMMAND_OPCODE, 0);
3729 errsts = check_condition_result;
3730 break;
3731 }
3732
3733 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
3734 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
3735 (cmd[1] & 0xe0) == 0)
3736 printk(KERN_ERR "Unprotected RD/WR to DIF device\n");
3737
3738 /* fall through */
3739 case READ_6:
3740read:
3741 errsts = check_readiness(SCpnt, 0, devip);
3742 if (errsts)
3743 break;
3744 if (scsi_debug_fake_rw)
3745 break;
3746 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3747 errsts = resp_read(SCpnt, lba, num, devip, ei_lba);
3748 if (inj_recovered && (0 == errsts)) {
3749 mk_sense_buffer(devip, RECOVERED_ERROR,
3750 THRESHOLD_EXCEEDED, 0);
3751 errsts = check_condition_result;
3752 } else if (inj_transport && (0 == errsts)) {
3753 mk_sense_buffer(devip, ABORTED_COMMAND,
3754 TRANSPORT_PROBLEM, ACK_NAK_TO);
3755 errsts = check_condition_result;
3756 } else if (inj_dif && (0 == errsts)) {
3757 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1);
3758 errsts = illegal_condition_result;
3759 } else if (inj_dix && (0 == errsts)) {
3760 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1);
3761 errsts = illegal_condition_result;
3762 }
3763 break;
3764 case REPORT_LUNS: /* mandatory, ignore unit attention */
3765 delay_override = 1;
3766 errsts = resp_report_luns(SCpnt, devip);
3767 break;
3768 case VERIFY: /* 10 byte SBC-2 command */
3769 errsts = check_readiness(SCpnt, 0, devip);
3770 break;
3771 case WRITE_16:
3772 case WRITE_12:
3773 case WRITE_10:
3774 /* WRITE{10,12,16} and DIF Type 2 are natural enemies */
3775 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
3776 cmd[1] & 0xe0) {
3777 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3778 INVALID_COMMAND_OPCODE, 0);
3779 errsts = check_condition_result;
3780 break;
3781 }
3782
3783 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
3784 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
3785 (cmd[1] & 0xe0) == 0)
3786 printk(KERN_ERR "Unprotected RD/WR to DIF device\n");
3787
3788 /* fall through */
3789 case WRITE_6:
3790write:
3791 errsts = check_readiness(SCpnt, 0, devip);
3792 if (errsts)
3793 break;
3794 if (scsi_debug_fake_rw)
3795 break;
3796 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3797 errsts = resp_write(SCpnt, lba, num, devip, ei_lba);
3798 if (inj_recovered && (0 == errsts)) {
3799 mk_sense_buffer(devip, RECOVERED_ERROR,
3800 THRESHOLD_EXCEEDED, 0);
3801 errsts = check_condition_result;
3802 } else if (inj_dif && (0 == errsts)) {
3803 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1);
3804 errsts = illegal_condition_result;
3805 } else if (inj_dix && (0 == errsts)) {
3806 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1);
3807 errsts = illegal_condition_result;
3808 }
3809 break;
3810 case WRITE_SAME_16:
3811 case WRITE_SAME:
3812 if (cmd[1] & 0x8) {
3813 if ((*cmd == WRITE_SAME_16 && scsi_debug_lbpws == 0) ||
3814 (*cmd == WRITE_SAME && scsi_debug_lbpws10 == 0)) {
3815 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3816 INVALID_FIELD_IN_CDB, 0);
3817 errsts = check_condition_result;
3818 } else
3819 unmap = 1;
3820 }
3821 if (errsts)
3822 break;
3823 errsts = check_readiness(SCpnt, 0, devip);
3824 if (errsts)
3825 break;
3826 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3827 errsts = resp_write_same(SCpnt, lba, num, devip, ei_lba, unmap);
3828 break;
3829 case UNMAP:
3830 errsts = check_readiness(SCpnt, 0, devip);
3831 if (errsts)
3832 break;
3833
3834 if (scsi_debug_unmap_max_desc == 0 || scsi_debug_lbpu == 0) {
3835 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3836 INVALID_COMMAND_OPCODE, 0);
3837 errsts = check_condition_result;
3838 } else
3839 errsts = resp_unmap(SCpnt, devip);
3840 break;
3841 case MODE_SENSE:
3842 case MODE_SENSE_10:
3843 errsts = resp_mode_sense(SCpnt, target, devip);
3844 break;
3845 case MODE_SELECT:
3846 errsts = resp_mode_select(SCpnt, 1, devip);
3847 break;
3848 case MODE_SELECT_10:
3849 errsts = resp_mode_select(SCpnt, 0, devip);
3850 break;
3851 case LOG_SENSE:
3852 errsts = resp_log_sense(SCpnt, devip);
3853 break;
3854 case SYNCHRONIZE_CACHE:
3855 delay_override = 1;
3856 errsts = check_readiness(SCpnt, 0, devip);
3857 break;
3858 case WRITE_BUFFER:
3859 errsts = check_readiness(SCpnt, 1, devip);
3860 break;
3861 case XDWRITEREAD_10:
3862 if (!scsi_bidi_cmnd(SCpnt)) {
3863 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3864 INVALID_FIELD_IN_CDB, 0);
3865 errsts = check_condition_result;
3866 break;
3867 }
3868
3869 errsts = check_readiness(SCpnt, 0, devip);
3870 if (errsts)
3871 break;
3872 if (scsi_debug_fake_rw)
3873 break;
3874 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3875 errsts = resp_read(SCpnt, lba, num, devip, ei_lba);
3876 if (errsts)
3877 break;
3878 errsts = resp_write(SCpnt, lba, num, devip, ei_lba);
3879 if (errsts)
3880 break;
3881 errsts = resp_xdwriteread(SCpnt, lba, num, devip);
3882 break;
3883 case VARIABLE_LENGTH_CMD:
3884 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION) {
3885
3886 if ((cmd[10] & 0xe0) == 0)
3887 printk(KERN_ERR
3888 "Unprotected RD/WR to DIF device\n");
3889
3890 if (cmd[9] == READ_32) {
3891 BUG_ON(SCpnt->cmd_len < 32);
3892 goto read;
3893 }
3894
3895 if (cmd[9] == WRITE_32) {
3896 BUG_ON(SCpnt->cmd_len < 32);
3897 goto write;
3898 }
3899 }
3900
3901 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3902 INVALID_FIELD_IN_CDB, 0);
3903 errsts = check_condition_result;
3904 break;
3905
3906 default:
3907 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3908 printk(KERN_INFO "scsi_debug: Opcode: 0x%x not "
3909 "supported\n", *cmd);
3910 errsts = check_readiness(SCpnt, 1, devip);
3911 if (errsts)
3912 break; /* Unit attention takes precedence */
3913 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
3914 errsts = check_condition_result;
3915 break;
3916 }
3917 return schedule_resp(SCpnt, devip, done, errsts,
3918 (delay_override ? 0 : scsi_debug_delay));
3919}
3920
3921static DEF_SCSI_QCMD(scsi_debug_queuecommand)
3922
3923static struct scsi_host_template sdebug_driver_template = {
3924 .show_info = scsi_debug_show_info,
3925 .write_info = scsi_debug_write_info,
3926 .proc_name = sdebug_proc_name,
3927 .name = "SCSI DEBUG",
3928 .info = scsi_debug_info,
3929 .slave_alloc = scsi_debug_slave_alloc,
3930 .slave_configure = scsi_debug_slave_configure,
3931 .slave_destroy = scsi_debug_slave_destroy,
3932 .ioctl = scsi_debug_ioctl,
3933 .queuecommand = scsi_debug_queuecommand,
3934 .eh_abort_handler = scsi_debug_abort,
3935 .eh_bus_reset_handler = scsi_debug_bus_reset,
3936 .eh_device_reset_handler = scsi_debug_device_reset,
3937 .eh_host_reset_handler = scsi_debug_host_reset,
3938 .bios_param = scsi_debug_biosparam,
3939 .can_queue = SCSI_DEBUG_CANQUEUE,
3940 .this_id = 7,
3941 .sg_tablesize = 256,
3942 .cmd_per_lun = 16,
3943 .max_sectors = 0xffff,
3944 .use_clustering = DISABLE_CLUSTERING,
3945 .module = THIS_MODULE,
3946};
3947
3948static int sdebug_driver_probe(struct device * dev)
3949{
3950 int error = 0;
3951 struct sdebug_host_info *sdbg_host;
3952 struct Scsi_Host *hpnt;
3953 int host_prot;
3954
3955 sdbg_host = to_sdebug_host(dev);
3956
3957 sdebug_driver_template.can_queue = scsi_debug_max_queue;
3958 if (scsi_debug_clustering)
3959 sdebug_driver_template.use_clustering = ENABLE_CLUSTERING;
3960 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
3961 if (NULL == hpnt) {
3962 printk(KERN_ERR "%s: scsi_register failed\n", __func__);
3963 error = -ENODEV;
3964 return error;
3965 }
3966
3967 sdbg_host->shost = hpnt;
3968 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
3969 if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id))
3970 hpnt->max_id = scsi_debug_num_tgts + 1;
3971 else
3972 hpnt->max_id = scsi_debug_num_tgts;
3973 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; /* = scsi_debug_max_luns; */
3974
3975 host_prot = 0;
3976
3977 switch (scsi_debug_dif) {
3978
3979 case SD_DIF_TYPE1_PROTECTION:
3980 host_prot = SHOST_DIF_TYPE1_PROTECTION;
3981 if (scsi_debug_dix)
3982 host_prot |= SHOST_DIX_TYPE1_PROTECTION;
3983 break;
3984
3985 case SD_DIF_TYPE2_PROTECTION:
3986 host_prot = SHOST_DIF_TYPE2_PROTECTION;
3987 if (scsi_debug_dix)
3988 host_prot |= SHOST_DIX_TYPE2_PROTECTION;
3989 break;
3990
3991 case SD_DIF_TYPE3_PROTECTION:
3992 host_prot = SHOST_DIF_TYPE3_PROTECTION;
3993 if (scsi_debug_dix)
3994 host_prot |= SHOST_DIX_TYPE3_PROTECTION;
3995 break;
3996
3997 default:
3998 if (scsi_debug_dix)
3999 host_prot |= SHOST_DIX_TYPE0_PROTECTION;
4000 break;
4001 }
4002
4003 scsi_host_set_prot(hpnt, host_prot);
4004
4005 printk(KERN_INFO "scsi_debug: host protection%s%s%s%s%s%s%s\n",
4006 (host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
4007 (host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
4008 (host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
4009 (host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
4010 (host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
4011 (host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
4012 (host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
4013
4014 if (scsi_debug_guard == 1)
4015 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
4016 else
4017 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
4018
4019 error = scsi_add_host(hpnt, &sdbg_host->dev);
4020 if (error) {
4021 printk(KERN_ERR "%s: scsi_add_host failed\n", __func__);
4022 error = -ENODEV;
4023 scsi_host_put(hpnt);
4024 } else
4025 scsi_scan_host(hpnt);
4026
4027
4028 return error;
4029}
4030
4031static int sdebug_driver_remove(struct device * dev)
4032{
4033 struct sdebug_host_info *sdbg_host;
4034 struct sdebug_dev_info *sdbg_devinfo, *tmp;
4035
4036 sdbg_host = to_sdebug_host(dev);
4037
4038 if (!sdbg_host) {
4039 printk(KERN_ERR "%s: Unable to locate host info\n",
4040 __func__);
4041 return -ENODEV;
4042 }
4043
4044 scsi_remove_host(sdbg_host->shost);
4045
4046 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
4047 dev_list) {
4048 list_del(&sdbg_devinfo->dev_list);
4049 kfree(sdbg_devinfo);
4050 }
4051
4052 scsi_host_put(sdbg_host->shost);
4053 return 0;
4054}
4055
4056static int pseudo_lld_bus_match(struct device *dev,
4057 struct device_driver *dev_driver)
4058{
4059 return 1;
4060}
4061
4062static struct bus_type pseudo_lld_bus = {
4063 .name = "pseudo",
4064 .match = pseudo_lld_bus_match,
4065 .probe = sdebug_driver_probe,
4066 .remove = sdebug_driver_remove,
4067 .drv_groups = sdebug_drv_groups,
4068};