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[mirror_ubuntu-zesty-kernel.git] / drivers / scsi / scsi_debug.c
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1da177e4 1/*
1da177e4
LT		 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 *
773642d9 9 * Copyright (C) 2001 - 2016 Douglas Gilbert
1da177e4 10 *
773642d9
DG		 11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2, or (at your option)
14 * any later version.
1da177e4 15 *
78d4e5a0 16 * For documentation see http://sg.danny.cz/sg/sdebug26.html
1da177e4 17 *
1da177e4
LT		 18 */
19
c1287970
TW		 20
21#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
22
1da177e4
LT		 23#include <linux/module.h>
24
25#include <linux/kernel.h>
1da177e4 26#include <linux/errno.h>
b333a819 27#include <linux/jiffies.h>
5a0e3ad6 28#include <linux/slab.h>
1da177e4
LT		 29#include <linux/types.h>
30#include <linux/string.h>
31#include <linux/genhd.h>
32#include <linux/fs.h>
33#include <linux/init.h>
34#include <linux/proc_fs.h>
1da177e4
LT		 35#include <linux/vmalloc.h>
36#include <linux/moduleparam.h>
852e034d 37#include <linux/scatterlist.h>
1da177e4 38#include <linux/blkdev.h>
c6a44287 39#include <linux/crc-t10dif.h>
cbf67842
DG		 40#include <linux/spinlock.h>
41#include <linux/interrupt.h>
42#include <linux/atomic.h>
43#include <linux/hrtimer.h>
09ba24c1 44#include <linux/uuid.h>
6ebf105c 45#include <linux/t10-pi.h>
c6a44287
MP		 46
47#include <net/checksum.h>
9ff26eef 48
44d92694
MP		 49#include <asm/unaligned.h>
50
9ff26eef
FT		 51#include <scsi/scsi.h>
52#include <scsi/scsi_cmnd.h>
53#include <scsi/scsi_device.h>
1da177e4
LT		 54#include <scsi/scsi_host.h>
55#include <scsi/scsicam.h>
a34c4e98 56#include <scsi/scsi_eh.h>
cbf67842 57#include <scsi/scsi_tcq.h>
395cef03 58#include <scsi/scsi_dbg.h>
1da177e4 59
c6a44287 60#include "sd.h"
1da177e4 61#include "scsi_logging.h"
1da177e4 62
773642d9 63/* make sure inq_product_rev string corresponds to this version */
b01f6f83
DG		 64#define SDEBUG_VERSION "1.86"
65static const char *sdebug_version_date = "20160430";
cbf67842
DG		 66
67#define MY_NAME "scsi_debug"
1da177e4 68
6f3cbf55 69/* Additional Sense Code (ASC) */
c65b1445
DG		 70#define NO_ADDITIONAL_SENSE 0x0
71#define LOGICAL_UNIT_NOT_READY 0x4
c2248fc9 72#define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
1da177e4 73#define UNRECOVERED_READ_ERR 0x11
c65b1445 74#define PARAMETER_LIST_LENGTH_ERR 0x1a
1da177e4 75#define INVALID_OPCODE 0x20
22017ed2 76#define LBA_OUT_OF_RANGE 0x21
1da177e4 77#define INVALID_FIELD_IN_CDB 0x24
c65b1445 78#define INVALID_FIELD_IN_PARAM_LIST 0x26
cbf67842
DG		 79#define UA_RESET_ASC 0x29
80#define UA_CHANGED_ASC 0x2a
19c8ead7
EM		 81#define TARGET_CHANGED_ASC 0x3f
82#define LUNS_CHANGED_ASCQ 0x0e
22017ed2
DG		 83#define INSUFF_RES_ASC 0x55
84#define INSUFF_RES_ASCQ 0x3
cbf67842
DG		 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 */
22017ed2 88#define CAPACITY_CHANGED_ASCQ 0x9
1da177e4 89#define SAVING_PARAMS_UNSUP 0x39
6f3cbf55 90#define TRANSPORT_PROBLEM 0x4b
c65b1445
DG		 91#define THRESHOLD_EXCEEDED 0x5d
92#define LOW_POWER_COND_ON 0x5e
22017ed2 93#define MISCOMPARE_VERIFY_ASC 0x1d
acafd0b9
EM		 94#define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */
95#define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16
1da177e4 96
6f3cbf55
DG		 97/* Additional Sense Code Qualifier (ASCQ) */
98#define ACK_NAK_TO 0x3
99
1da177e4
LT		 100/* Default values for driver parameters */
101#define DEF_NUM_HOST 1
102#define DEF_NUM_TGTS 1
103#define DEF_MAX_LUNS 1
104/* With these defaults, this driver will make 1 host with 1 target
105 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
106 */
5b94e232 107#define DEF_ATO 1
c2206098 108#define DEF_JDELAY 1 /* if > 0 unit is a jiffy */
1da177e4 109#define DEF_DEV_SIZE_MB 8
5b94e232
MP		 110#define DEF_DIF 0
111#define DEF_DIX 0
1da177e4 112#define DEF_D_SENSE 0
5b94e232 113#define DEF_EVERY_NTH 0
23183910 114#define DEF_FAKE_RW 0
c6a44287 115#define DEF_GUARD 0
cbf67842 116#define DEF_HOST_LOCK 0
5b94e232
MP		 117#define DEF_LBPU 0
118#define DEF_LBPWS 0
119#define DEF_LBPWS10 0
be1dd78d 120#define DEF_LBPRZ 1
ea61fca5 121#define DEF_LOWEST_ALIGNED 0
cbf67842 122#define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */
5b94e232
MP		 123#define DEF_NO_LUN_0 0
124#define DEF_NUM_PARTS 0
125#define DEF_OPTS 0
32c5844a 126#define DEF_OPT_BLKS 1024
5b94e232 127#define DEF_PHYSBLK_EXP 0
b01f6f83 128#define DEF_PTYPE TYPE_DISK
d986788b 129#define DEF_REMOVABLE false
760f3b03 130#define DEF_SCSI_LEVEL 7 /* INQUIRY, byte2 [6->SPC-4; 7->SPC-5] */
5b94e232
MP		 131#define DEF_SECTOR_SIZE 512
132#define DEF_UNMAP_ALIGNMENT 0
133#define DEF_UNMAP_GRANULARITY 1
6014759c
MP		 134#define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
135#define DEF_UNMAP_MAX_DESC 256
5b94e232
MP		 136#define DEF_VIRTUAL_GB 0
137#define DEF_VPD_USE_HOSTNO 1
138#define DEF_WRITESAME_LENGTH 0xFFFF
c2248fc9 139#define DEF_STRICT 0
c4837394
DG		 140#define DEF_STATISTICS false
141#define DEF_SUBMIT_QUEUES 1
09ba24c1 142#define DEF_UUID_CTL 0
c2206098 143#define JDELAY_OVERRIDDEN -9999
1da177e4 144
b01f6f83
DG		 145#define SDEBUG_LUN_0_VAL 0
146
773642d9
DG		 147/* bit mask values for sdebug_opts */
148#define SDEBUG_OPT_NOISE 1
149#define SDEBUG_OPT_MEDIUM_ERR 2
150#define SDEBUG_OPT_TIMEOUT 4
151#define SDEBUG_OPT_RECOVERED_ERR 8
152#define SDEBUG_OPT_TRANSPORT_ERR 16
153#define SDEBUG_OPT_DIF_ERR 32
154#define SDEBUG_OPT_DIX_ERR 64
155#define SDEBUG_OPT_MAC_TIMEOUT 128
156#define SDEBUG_OPT_SHORT_TRANSFER 0x100
157#define SDEBUG_OPT_Q_NOISE 0x200
158#define SDEBUG_OPT_ALL_TSF 0x400
159#define SDEBUG_OPT_RARE_TSF 0x800
160#define SDEBUG_OPT_N_WCE 0x1000
161#define SDEBUG_OPT_RESET_NOISE 0x2000
162#define SDEBUG_OPT_NO_CDB_NOISE 0x4000
163#define SDEBUG_OPT_ALL_NOISE (SDEBUG_OPT_NOISE | SDEBUG_OPT_Q_NOISE | \
164 SDEBUG_OPT_RESET_NOISE)
165#define SDEBUG_OPT_ALL_INJECTING (SDEBUG_OPT_RECOVERED_ERR | \
166 SDEBUG_OPT_TRANSPORT_ERR | \
167 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR | \
168 SDEBUG_OPT_SHORT_TRANSFER)
1da177e4 169/* When "every_nth" > 0 then modulo "every_nth" commands:
fd32119b 170 * - a missing response is simulated if SDEBUG_OPT_TIMEOUT is set
1da177e4 171 * - a RECOVERED_ERROR is simulated on successful read and write
773642d9 172 * commands if SDEBUG_OPT_RECOVERED_ERR is set.
6f3cbf55 173 * - a TRANSPORT_ERROR is simulated on successful read and write
773642d9 174 * commands if SDEBUG_OPT_TRANSPORT_ERR is set.
1da177e4
LT		 175 *
176 * When "every_nth" < 0 then after "- every_nth" commands:
fd32119b 177 * - a missing response is simulated if SDEBUG_OPT_TIMEOUT is set
1da177e4 178 * - a RECOVERED_ERROR is simulated on successful read and write
773642d9 179 * commands if SDEBUG_OPT_RECOVERED_ERR is set.
6f3cbf55 180 * - a TRANSPORT_ERROR is simulated on successful read and write
773642d9
DG		 181 * commands if _DEBUG_OPT_TRANSPORT_ERR is set.
182 * This will continue on every subsequent command until some other action
183 * occurs (e.g. the user * writing a new value (other than -1 or 1) to
184 * every_nth via sysfs).
1da177e4
LT		 185 */
186
fd32119b 187/* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs) are returned in
cbf67842
DG		 188 * priority order. In the subset implemented here lower numbers have higher
189 * priority. The UA numbers should be a sequence starting from 0 with
190 * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */
191#define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */
192#define SDEBUG_UA_BUS_RESET 1
193#define SDEBUG_UA_MODE_CHANGED 2
0d01c5df 194#define SDEBUG_UA_CAPACITY_CHANGED 3
19c8ead7 195#define SDEBUG_UA_LUNS_CHANGED 4
acafd0b9
EM		 196#define SDEBUG_UA_MICROCODE_CHANGED 5 /* simulate firmware change */
197#define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 6
198#define SDEBUG_NUM_UAS 7
cbf67842 199
773642d9 200/* when 1==SDEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
1da177e4
LT		 201 * sector on read commands: */
202#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
32f7ef73 203#define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
1da177e4
LT		 204
205/* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
206 * or "peripheral device" addressing (value 0) */
207#define SAM2_LUN_ADDRESS_METHOD 0
208
c4837394
DG		 209/* SDEBUG_CANQUEUE is the maximum number of commands that can be queued
210 * (for response) per submit queue at one time. Can be reduced by max_queue
211 * option. Command responses are not queued when jdelay=0 and ndelay=0. The
212 * per-device DEF_CMD_PER_LUN can be changed via sysfs:
213 * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth
214 * but cannot exceed SDEBUG_CANQUEUE .
215 */
216#define SDEBUG_CANQUEUE_WORDS 3 /* a WORD is bits in a long */
217#define SDEBUG_CANQUEUE (SDEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
cbf67842
DG		 218#define DEF_CMD_PER_LUN 255
219
fd32119b
DG		 220#define F_D_IN 1
221#define F_D_OUT 2
222#define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */
223#define F_D_UNKN 8
224#define F_RL_WLUN_OK 0x10
225#define F_SKIP_UA 0x20
226#define F_DELAY_OVERR 0x40
227#define F_SA_LOW 0x80 /* cdb byte 1, bits 4 to 0 */
228#define F_SA_HIGH 0x100 /* as used by variable length cdbs */
229#define F_INV_OP 0x200
230#define F_FAKE_RW 0x400
231#define F_M_ACCESS 0x800 /* media access */
232
233#define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR)
234#define FF_DIRECT_IO (F_M_ACCESS | F_FAKE_RW)
235#define FF_SA (F_SA_HIGH | F_SA_LOW)
236
237#define SDEBUG_MAX_PARTS 4
238
b01f6f83 239#define SDEBUG_MAX_CMD_LEN 32
fd32119b
DG		 240
241
242struct sdebug_dev_info {
243 struct list_head dev_list;
244 unsigned int channel;
245 unsigned int target;
246 u64 lun;
09ba24c1 247 uuid_be lu_name;
fd32119b
DG		 248 struct sdebug_host_info *sdbg_host;
249 unsigned long uas_bm[1];
250 atomic_t num_in_q;
c4837394 251 atomic_t stopped;
fd32119b
DG		 252 bool used;
253};
254
255struct sdebug_host_info {
256 struct list_head host_list;
257 struct Scsi_Host *shost;
258 struct device dev;
259 struct list_head dev_info_list;
260};
261
262#define to_sdebug_host(d) \
263 container_of(d, struct sdebug_host_info, dev)
264
265struct sdebug_defer {
266 struct hrtimer hrt;
267 struct execute_work ew;
c4837394
DG		 268 int sqa_idx; /* index of sdebug_queue array */
269 int qc_idx; /* index of sdebug_queued_cmd array within sqa_idx */
270 int issuing_cpu;
fd32119b
DG		 271};
272
273struct sdebug_queued_cmd {
c4837394
DG		 274 /* corresponding bit set in in_use_bm[] in owning struct sdebug_queue
275 * instance indicates this slot is in use.
276 */
fd32119b
DG		 277 struct sdebug_defer *sd_dp;
278 struct scsi_cmnd *a_cmnd;
c4837394
DG		 279 unsigned int inj_recovered:1;
280 unsigned int inj_transport:1;
281 unsigned int inj_dif:1;
282 unsigned int inj_dix:1;
283 unsigned int inj_short:1;
fd32119b
DG		 284};
285
c4837394
DG		 286struct sdebug_queue {
287 struct sdebug_queued_cmd qc_arr[SDEBUG_CANQUEUE];
288 unsigned long in_use_bm[SDEBUG_CANQUEUE_WORDS];
289 spinlock_t qc_lock;
290 atomic_t blocked; /* to temporarily stop more being queued */
fd32119b
DG		 291};
292
c4837394
DG		 293static atomic_t sdebug_cmnd_count; /* number of incoming commands */
294static atomic_t sdebug_completions; /* count of deferred completions */
295static atomic_t sdebug_miss_cpus; /* submission + completion cpus differ */
296static atomic_t sdebug_a_tsf; /* 'almost task set full' counter */
297
fd32119b 298struct opcode_info_t {
b01f6f83
DG		 299 u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff */
300 /* for terminating element */
fd32119b
DG		 301 u8 opcode; /* if num_attached > 0, preferred */
302 u16 sa; /* service action */
303 u32 flags; /* OR-ed set of SDEB_F_* */
304 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
305 const struct opcode_info_t *arrp; /* num_attached elements or NULL */
306 u8 len_mask[16]; /* len=len_mask[0], then mask for cdb[1]... */
307 /* ignore cdb bytes after position 15 */
308};
309
310/* SCSI opcodes (first byte of cdb) of interest mapped onto these indexes */
c2248fc9
DG		 311enum sdeb_opcode_index {
312 SDEB_I_INVALID_OPCODE = 0,
313 SDEB_I_INQUIRY = 1,
314 SDEB_I_REPORT_LUNS = 2,
315 SDEB_I_REQUEST_SENSE = 3,
316 SDEB_I_TEST_UNIT_READY = 4,
317 SDEB_I_MODE_SENSE = 5, /* 6, 10 */
318 SDEB_I_MODE_SELECT = 6, /* 6, 10 */
319 SDEB_I_LOG_SENSE = 7,
320 SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */
321 SDEB_I_READ = 9, /* 6, 10, 12, 16 */
322 SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */
323 SDEB_I_START_STOP = 11,
324 SDEB_I_SERV_ACT_IN = 12, /* 12, 16 */
325 SDEB_I_SERV_ACT_OUT = 13, /* 12, 16 */
326 SDEB_I_MAINT_IN = 14,
327 SDEB_I_MAINT_OUT = 15,
328 SDEB_I_VERIFY = 16, /* 10 only */
329 SDEB_I_VARIABLE_LEN = 17,
330 SDEB_I_RESERVE = 18, /* 6, 10 */
331 SDEB_I_RELEASE = 19, /* 6, 10 */
332 SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
333 SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */
334 SDEB_I_ATA_PT = 22, /* 12, 16 */
335 SDEB_I_SEND_DIAG = 23,
336 SDEB_I_UNMAP = 24,
337 SDEB_I_XDWRITEREAD = 25, /* 10 only */
338 SDEB_I_WRITE_BUFFER = 26,
339 SDEB_I_WRITE_SAME = 27, /* 10, 16 */
340 SDEB_I_SYNC_CACHE = 28, /* 10 only */
341 SDEB_I_COMP_WRITE = 29,
342 SDEB_I_LAST_ELEMENT = 30, /* keep this last */
343};
344
c4837394 345
c2248fc9
DG		 346static const unsigned char opcode_ind_arr[256] = {
347/* 0x0; 0x0->0x1f: 6 byte cdbs */
348 SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE,
349 0, 0, 0, 0,
350 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0,
351 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
352 SDEB_I_RELEASE,
353 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG,
354 SDEB_I_ALLOW_REMOVAL, 0,
355/* 0x20; 0x20->0x3f: 10 byte cdbs */
356 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0,
357 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY,
358 0, 0, 0, 0, 0, SDEB_I_SYNC_CACHE, 0, 0,
359 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0,
360/* 0x40; 0x40->0x5f: 10 byte cdbs */
361 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0,
362 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0,
363 0, 0, 0, SDEB_I_XDWRITEREAD, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
364 SDEB_I_RELEASE,
365 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0,
fd32119b 366/* 0x60; 0x60->0x7d are reserved, 0x7e is "extended cdb" */
c2248fc9
DG		 367 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
368 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
369 0, SDEB_I_VARIABLE_LEN,
370/* 0x80; 0x80->0x9f: 16 byte cdbs */
371 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0,
372 SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0, 0, 0, 0, 0,
373 0, 0, 0, SDEB_I_WRITE_SAME, 0, 0, 0, 0,
374 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN, SDEB_I_SERV_ACT_OUT,
375/* 0xa0; 0xa0->0xbf: 12 byte cdbs */
376 SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN,
377 SDEB_I_MAINT_OUT, 0, 0, 0,
378 SDEB_I_READ, SDEB_I_SERV_ACT_OUT, SDEB_I_WRITE, SDEB_I_SERV_ACT_IN,
379 0, 0, 0, 0,
380 0, 0, 0, 0, 0, 0, 0, 0,
381 0, 0, 0, 0, 0, 0, 0, 0,
382/* 0xc0; 0xc0->0xff: vendor specific */
383 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
384 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
385 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
386 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
387};
388
c2248fc9
DG		 389static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *);
390static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *);
391static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *);
392static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
393static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *);
394static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
395static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
396static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
397static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
398static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
399static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
400static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
401static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *);
402static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *);
38d5c833
DG		 403static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *);
404static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *);
c2248fc9
DG		 405static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *);
406static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *);
407static int resp_xdwriteread_10(struct scsi_cmnd *, struct sdebug_dev_info *);
38d5c833 408static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
acafd0b9 409static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *);
c2248fc9 410
c2248fc9
DG		 411static const struct opcode_info_t msense_iarr[1] = {
412 {0, 0x1a, 0, F_D_IN, NULL, NULL,
413 {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
414};
415
416static const struct opcode_info_t mselect_iarr[1] = {
417 {0, 0x15, 0, F_D_OUT, NULL, NULL,
418 {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
419};
420
421static const struct opcode_info_t read_iarr[3] = {
422 {0, 0x28, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL,/* READ(10) */
423 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
424 0, 0, 0, 0} },
425 {0, 0x8, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL, /* READ(6) */
426 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
427 {0, 0xa8, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL,/* READ(12) */
428 {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x9f,
429 0xc7, 0, 0, 0, 0} },
430};
431
432static const struct opcode_info_t write_iarr[3] = {
433 {0, 0x2a, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 10 */
434 {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
435 0, 0, 0, 0} },
436 {0, 0xa, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 6 */
437 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
438 {0, 0xaa, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 12 */
439 {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x9f,
440 0xc7, 0, 0, 0, 0} },
441};
442
443static const struct opcode_info_t sa_in_iarr[1] = {
444 {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL,
445 {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
446 0xff, 0xff, 0xff, 0, 0xc7} },
447};
448
449static const struct opcode_info_t vl_iarr[1] = { /* VARIABLE LENGTH */
450 {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_DIRECT_IO, resp_write_dt0,
451 NULL, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0xb, 0xfa,
452 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
453};
454
455static const struct opcode_info_t maint_in_iarr[2] = {
38d5c833 456 {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL,
c2248fc9
DG		 457 {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
458 0xc7, 0, 0, 0, 0} },
38d5c833 459 {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL,
c2248fc9
DG		 460 {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
461 0, 0} },
462};
463
464static const struct opcode_info_t write_same_iarr[1] = {
465 {0, 0x93, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, resp_write_same_16, NULL,
466 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
467 0xff, 0xff, 0xff, 0x1f, 0xc7} },
468};
469
470static const struct opcode_info_t reserve_iarr[1] = {
471 {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */
472 {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
473};
474
475static const struct opcode_info_t release_iarr[1] = {
476 {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */
477 {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
478};
479
480
481/* This array is accessed via SDEB_I_* values. Make sure all are mapped,
482 * plus the terminating elements for logic that scans this table such as
483 * REPORT SUPPORTED OPERATION CODES. */
484static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEMENT + 1] = {
485/* 0 */
486 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL,
487 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
488 {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL,
489 {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
490 {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL,
491 {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
492 0, 0} },
493 {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL,
494 {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
495 {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */
496 {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
497 {1, 0x5a, 0, F_D_IN, resp_mode_sense, msense_iarr,
498 {10, 0xf8, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
499 0} },
500 {1, 0x55, 0, F_D_OUT, resp_mode_select, mselect_iarr,
501 {10, 0xf1, 0, 0, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
502 {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL,
503 {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0,
504 0, 0, 0} },
505 {0, 0x25, 0, F_D_IN, resp_readcap, NULL,
506 {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0,
507 0, 0} },
508 {3, 0x88, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, read_iarr,
509 {16, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
510 0xff, 0xff, 0xff, 0x9f, 0xc7} }, /* READ(16) */
511/* 10 */
512 {3, 0x8a, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, write_iarr,
513 {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
514 0xff, 0xff, 0xff, 0x9f, 0xc7} }, /* WRITE(16) */
515 {0, 0x1b, 0, 0, resp_start_stop, NULL, /* START STOP UNIT */
516 {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
517 {1, 0x9e, 0x10, F_SA_LOW | F_D_IN, resp_readcap16, sa_in_iarr,
518 {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
519 0xff, 0xff, 0xff, 0x1, 0xc7} }, /* READ CAPACITY(16) */
520 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* SA OUT */
521 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
522 {2, 0xa3, 0xa, F_SA_LOW | F_D_IN, resp_report_tgtpgs, maint_in_iarr,
523 {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, 0,
524 0} },
525 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */
526 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
f7f9f26b
DG		 527 {0, 0x2f, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, NULL, NULL, /* VERIFY(10) */
528 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7,
529 0, 0, 0, 0, 0, 0} },
c2248fc9
DG		 530 {1, 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_DIRECT_IO, resp_read_dt0,
531 vl_iarr, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0x9, 0xfe, 0,
532 0xff, 0xff, 0xff, 0xff} },/* VARIABLE LENGTH, READ(32) */
533 {1, 0x56, 0, F_D_OUT, NULL, reserve_iarr, /* RESERVE(10) */
534 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
535 0} },
536 {1, 0x57, 0, F_D_OUT, NULL, release_iarr, /* RELEASE(10) */
537 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
538 0} },
539/* 20 */
f7f9f26b
DG		 540 {0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */
541 {6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
c2248fc9
DG		 542 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */
543 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
544 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */
545 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
546 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */
547 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
548 {0, 0x42, 0, F_D_OUT | FF_DIRECT_IO, resp_unmap, NULL, /* UNMAP */
549 {10, 0x1, 0, 0, 0, 0, 0x1f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
550 {0, 0x53, 0, F_D_IN | F_D_OUT | FF_DIRECT_IO, resp_xdwriteread_10,
551 NULL, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7,
552 0, 0, 0, 0, 0, 0} },
acafd0b9
EM		 553 {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL,
554 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0,
555 0, 0, 0, 0} }, /* WRITE_BUFFER */
c2248fc9
DG		 556 {1, 0x41, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, resp_write_same_10,
557 write_same_iarr, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff,
558 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
559 {0, 0x35, 0, F_DELAY_OVERR | FF_DIRECT_IO, NULL, NULL, /* SYNC_CACHE */
560 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
561 0, 0, 0, 0} },
38d5c833 562 {0, 0x89, 0, F_D_OUT | FF_DIRECT_IO, resp_comp_write, NULL,
c2248fc9
DG		 563 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
564 0, 0xff, 0x1f, 0xc7} }, /* COMPARE AND WRITE */
565
566/* 30 */
567 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */
568 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
569};
570
773642d9
DG		 571static int sdebug_add_host = DEF_NUM_HOST;
572static int sdebug_ato = DEF_ATO;
c2206098 573static int sdebug_jdelay = DEF_JDELAY; /* if > 0 then unit is jiffies */
773642d9
DG		 574static int sdebug_dev_size_mb = DEF_DEV_SIZE_MB;
575static int sdebug_dif = DEF_DIF;
576static int sdebug_dix = DEF_DIX;
577static int sdebug_dsense = DEF_D_SENSE;
578static int sdebug_every_nth = DEF_EVERY_NTH;
579static int sdebug_fake_rw = DEF_FAKE_RW;
580static unsigned int sdebug_guard = DEF_GUARD;
581static int sdebug_lowest_aligned = DEF_LOWEST_ALIGNED;
582static int sdebug_max_luns = DEF_MAX_LUNS;
c4837394 583static int sdebug_max_queue = SDEBUG_CANQUEUE; /* per submit queue */
cbf67842 584static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */
c2206098 585static int sdebug_ndelay = DEF_NDELAY; /* if > 0 then unit is nanoseconds */
773642d9
DG		 586static int sdebug_no_lun_0 = DEF_NO_LUN_0;
587static int sdebug_no_uld;
588static int sdebug_num_parts = DEF_NUM_PARTS;
589static int sdebug_num_tgts = DEF_NUM_TGTS; /* targets per host */
590static int sdebug_opt_blks = DEF_OPT_BLKS;
591static int sdebug_opts = DEF_OPTS;
592static int sdebug_physblk_exp = DEF_PHYSBLK_EXP;
b01f6f83 593static int sdebug_ptype = DEF_PTYPE; /* SCSI peripheral device type */
773642d9
DG		 594static int sdebug_scsi_level = DEF_SCSI_LEVEL;
595static int sdebug_sector_size = DEF_SECTOR_SIZE;
596static int sdebug_virtual_gb = DEF_VIRTUAL_GB;
597static int sdebug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
598static unsigned int sdebug_lbpu = DEF_LBPU;
599static unsigned int sdebug_lbpws = DEF_LBPWS;
600static unsigned int sdebug_lbpws10 = DEF_LBPWS10;
601static unsigned int sdebug_lbprz = DEF_LBPRZ;
602static unsigned int sdebug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
603static unsigned int sdebug_unmap_granularity = DEF_UNMAP_GRANULARITY;
604static unsigned int sdebug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
605static unsigned int sdebug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
606static unsigned int sdebug_write_same_length = DEF_WRITESAME_LENGTH;
09ba24c1 607static int sdebug_uuid_ctl = DEF_UUID_CTL;
773642d9
DG		 608static bool sdebug_removable = DEF_REMOVABLE;
609static bool sdebug_clustering;
610static bool sdebug_host_lock = DEF_HOST_LOCK;
611static bool sdebug_strict = DEF_STRICT;
817fd66b 612static bool sdebug_any_injecting_opt;
773642d9 613static bool sdebug_verbose;
f46eb0e9 614static bool have_dif_prot;
c4837394
DG		 615static bool sdebug_statistics = DEF_STATISTICS;
616static bool sdebug_mq_active;
1da177e4 617
c65b1445 618static unsigned int sdebug_store_sectors;
1da177e4
LT		 619static sector_t sdebug_capacity; /* in sectors */
620
621/* old BIOS stuff, kernel may get rid of them but some mode sense pages
622 may still need them */
623static int sdebug_heads; /* heads per disk */
624static int sdebug_cylinders_per; /* cylinders per surface */
625static int sdebug_sectors_per; /* sectors per cylinder */
626
1da177e4
LT		 627static LIST_HEAD(sdebug_host_list);
628static DEFINE_SPINLOCK(sdebug_host_list_lock);
629
fd32119b 630static unsigned char *fake_storep; /* ramdisk storage */
6ebf105c 631static struct t10_pi_tuple *dif_storep; /* protection info */
44d92694 632static void *map_storep; /* provisioning map */
1da177e4 633
44d92694 634static unsigned long map_size;
cbf67842
DG		 635static int num_aborts;
636static int num_dev_resets;
637static int num_target_resets;
638static int num_bus_resets;
639static int num_host_resets;
c6a44287
MP		 640static int dix_writes;
641static int dix_reads;
642static int dif_errors;
1da177e4 643
c4837394
DG		 644static int submit_queues = DEF_SUBMIT_QUEUES; /* > 1 for multi-queue (mq) */
645static struct sdebug_queue *sdebug_q_arr; /* ptr to array of submit queues */
fd32119b 646
1da177e4
LT		 647static DEFINE_RWLOCK(atomic_rw);
648
cbf67842
DG		 649static char sdebug_proc_name[] = MY_NAME;
650static const char *my_name = MY_NAME;
1da177e4 651
1da177e4
LT		 652static struct bus_type pseudo_lld_bus;
653
654static struct device_driver sdebug_driverfs_driver = {
655 .name = sdebug_proc_name,
656 .bus = &pseudo_lld_bus,
1da177e4
LT		 657};
658
659static const int check_condition_result =
660 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
661
c6a44287
MP		 662static const int illegal_condition_result =
663 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
664
cbf67842
DG		 665static const int device_qfull_result =
666 (DID_OK << 16) | (COMMAND_COMPLETE << 8) | SAM_STAT_TASK_SET_FULL;
667
fd32119b 668
760f3b03
DG		 669/* Only do the extra work involved in logical block provisioning if one or
670 * more of the lbpu, lbpws or lbpws10 parameters are given and we are doing
671 * real reads and writes (i.e. not skipping them for speed).
672 */
673static inline bool scsi_debug_lbp(void)
fd32119b
DG		 674{
675 return 0 == sdebug_fake_rw &&
676 (sdebug_lbpu || sdebug_lbpws || sdebug_lbpws10);
677}
c65b1445 678
14faa944
AM		 679static void *fake_store(unsigned long long lba)
680{
681 lba = do_div(lba, sdebug_store_sectors);
682
773642d9 683 return fake_storep + lba * sdebug_sector_size;
14faa944
AM		 684}
685
6ebf105c 686static struct t10_pi_tuple *dif_store(sector_t sector)
14faa944 687{
49413112 688 sector = sector_div(sector, sdebug_store_sectors);
14faa944
AM		 689
690 return dif_storep + sector;
691}
692
8dea0d02
FT		 693static void sdebug_max_tgts_luns(void)
694{
695 struct sdebug_host_info *sdbg_host;
696 struct Scsi_Host *hpnt;
697
698 spin_lock(&sdebug_host_list_lock);
699 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
700 hpnt = sdbg_host->shost;
701 if ((hpnt->this_id >= 0) &&
773642d9
DG		 702 (sdebug_num_tgts > hpnt->this_id))
703 hpnt->max_id = sdebug_num_tgts + 1;
8dea0d02 704 else
773642d9
DG		 705 hpnt->max_id = sdebug_num_tgts;
706 /* sdebug_max_luns; */
f2d3fd29 707 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
8dea0d02
FT		 708 }
709 spin_unlock(&sdebug_host_list_lock);
710}
711
22017ed2
DG		 712enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
713
714/* Set in_bit to -1 to indicate no bit position of invalid field */
fd32119b
DG		 715static void mk_sense_invalid_fld(struct scsi_cmnd *scp,
716 enum sdeb_cmd_data c_d,
717 int in_byte, int in_bit)
22017ed2
DG		 718{
719 unsigned char *sbuff;
720 u8 sks[4];
721 int sl, asc;
722
723 sbuff = scp->sense_buffer;
724 if (!sbuff) {
725 sdev_printk(KERN_ERR, scp->device,
726 "%s: sense_buffer is NULL\n", __func__);
727 return;
728 }
729 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
730 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
773642d9 731 scsi_build_sense_buffer(sdebug_dsense, sbuff, ILLEGAL_REQUEST, asc, 0);
22017ed2
DG		 732 memset(sks, 0, sizeof(sks));
733 sks[0] = 0x80;
734 if (c_d)
735 sks[0] |= 0x40;
736 if (in_bit >= 0) {
737 sks[0] |= 0x8;
738 sks[0] |= 0x7 & in_bit;
739 }
740 put_unaligned_be16(in_byte, sks + 1);
773642d9 741 if (sdebug_dsense) {
22017ed2
DG		 742 sl = sbuff[7] + 8;
743 sbuff[7] = sl;
744 sbuff[sl] = 0x2;
745 sbuff[sl + 1] = 0x6;
746 memcpy(sbuff + sl + 4, sks, 3);
747 } else
748 memcpy(sbuff + 15, sks, 3);
773642d9 749 if (sdebug_verbose)
22017ed2
DG		 750 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
751 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
752 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
753}
754
cbf67842 755static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
8dea0d02
FT		 756{
757 unsigned char *sbuff;
758
cbf67842
DG		 759 sbuff = scp->sense_buffer;
760 if (!sbuff) {
761 sdev_printk(KERN_ERR, scp->device,
762 "%s: sense_buffer is NULL\n", __func__);
763 return;
764 }
765 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
8dea0d02 766
773642d9 767 scsi_build_sense_buffer(sdebug_dsense, sbuff, key, asc, asq);
8dea0d02 768
773642d9 769 if (sdebug_verbose)
cbf67842
DG		 770 sdev_printk(KERN_INFO, scp->device,
771 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
772 my_name, key, asc, asq);
8dea0d02 773}
1da177e4 774
fd32119b 775static void mk_sense_invalid_opcode(struct scsi_cmnd *scp)
22017ed2
DG		 776{
777 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
778}
779
1da177e4
LT		 780static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
781{
773642d9 782 if (sdebug_verbose) {
cbf67842
DG		 783 if (0x1261 == cmd)
784 sdev_printk(KERN_INFO, dev,
785 "%s: BLKFLSBUF [0x1261]\n", __func__);
786 else if (0x5331 == cmd)
787 sdev_printk(KERN_INFO, dev,
788 "%s: CDROM_GET_CAPABILITY [0x5331]\n",
789 __func__);
790 else
791 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
792 __func__, cmd);
1da177e4
LT		 793 }
794 return -EINVAL;
795 /* return -ENOTTY; // correct return but upsets fdisk */
796}
797
19c8ead7
EM		 798static void clear_luns_changed_on_target(struct sdebug_dev_info *devip)
799{
800 struct sdebug_host_info *sdhp;
801 struct sdebug_dev_info *dp;
802
803 spin_lock(&sdebug_host_list_lock);
804 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
805 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
806 if ((devip->sdbg_host == dp->sdbg_host) &&
807 (devip->target == dp->target))
808 clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
809 }
810 }
811 spin_unlock(&sdebug_host_list_lock);
812}
813
f46eb0e9 814static int make_ua(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1da177e4 815{
cbf67842 816 int k;
cbf67842
DG		 817
818 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
819 if (k != SDEBUG_NUM_UAS) {
820 const char *cp = NULL;
821
822 switch (k) {
823 case SDEBUG_UA_POR:
f46eb0e9
DG		 824 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
825 POWER_ON_RESET_ASCQ);
773642d9 826 if (sdebug_verbose)
cbf67842
DG		 827 cp = "power on reset";
828 break;
829 case SDEBUG_UA_BUS_RESET:
f46eb0e9
DG		 830 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
831 BUS_RESET_ASCQ);
773642d9 832 if (sdebug_verbose)
cbf67842
DG		 833 cp = "bus reset";
834 break;
835 case SDEBUG_UA_MODE_CHANGED:
f46eb0e9
DG		 836 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
837 MODE_CHANGED_ASCQ);
773642d9 838 if (sdebug_verbose)
cbf67842
DG		 839 cp = "mode parameters changed";
840 break;
0d01c5df 841 case SDEBUG_UA_CAPACITY_CHANGED:
f46eb0e9
DG		 842 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
843 CAPACITY_CHANGED_ASCQ);
773642d9 844 if (sdebug_verbose)
0d01c5df 845 cp = "capacity data changed";
f49accf1 846 break;
acafd0b9 847 case SDEBUG_UA_MICROCODE_CHANGED:
f46eb0e9 848 mk_sense_buffer(scp, UNIT_ATTENTION,
b01f6f83
DG		 849 TARGET_CHANGED_ASC,
850 MICROCODE_CHANGED_ASCQ);
773642d9 851 if (sdebug_verbose)
acafd0b9
EM		 852 cp = "microcode has been changed";
853 break;
854 case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET:
f46eb0e9 855 mk_sense_buffer(scp, UNIT_ATTENTION,
acafd0b9
EM		 856 TARGET_CHANGED_ASC,
857 MICROCODE_CHANGED_WO_RESET_ASCQ);
773642d9 858 if (sdebug_verbose)
acafd0b9
EM		 859 cp = "microcode has been changed without reset";
860 break;
19c8ead7
EM		 861 case SDEBUG_UA_LUNS_CHANGED:
862 /*
863 * SPC-3 behavior is to report a UNIT ATTENTION with
864 * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN
865 * on the target, until a REPORT LUNS command is
866 * received. SPC-4 behavior is to report it only once.
773642d9 867 * NOTE: sdebug_scsi_level does not use the same
19c8ead7
EM		 868 * values as struct scsi_device->scsi_level.
869 */
773642d9 870 if (sdebug_scsi_level >= 6) /* SPC-4 and above */
19c8ead7 871 clear_luns_changed_on_target(devip);
f46eb0e9 872 mk_sense_buffer(scp, UNIT_ATTENTION,
19c8ead7
EM		 873 TARGET_CHANGED_ASC,
874 LUNS_CHANGED_ASCQ);
773642d9 875 if (sdebug_verbose)
19c8ead7
EM		 876 cp = "reported luns data has changed";
877 break;
cbf67842 878 default:
773642d9
DG		 879 pr_warn("unexpected unit attention code=%d\n", k);
880 if (sdebug_verbose)
cbf67842
DG		 881 cp = "unknown";
882 break;
883 }
884 clear_bit(k, devip->uas_bm);
773642d9 885 if (sdebug_verbose)
f46eb0e9 886 sdev_printk(KERN_INFO, scp->device,
cbf67842
DG		 887 "%s reports: Unit attention: %s\n",
888 my_name, cp);
1da177e4
LT		 889 return check_condition_result;
890 }
891 return 0;
892}
893
fb0cc8d1 894/* Build SCSI "data-in" buffer. Returns 0 if ok else (DID_ERROR << 16). */
21a61829 895static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1da177e4
LT		 896 int arr_len)
897{
21a61829 898 int act_len;
072d0bb3 899 struct scsi_data_buffer *sdb = scsi_in(scp);
1da177e4 900
072d0bb3 901 if (!sdb->length)
1da177e4 902 return 0;
072d0bb3 903 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
773642d9 904 return DID_ERROR << 16;
21a61829
FT		 905
906 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
907 arr, arr_len);
a4517511 908 sdb->resid = scsi_bufflen(scp) - act_len;
21a61829 909
1da177e4
LT		 910 return 0;
911}
912
fb0cc8d1
DG		 913/* Partial build of SCSI "data-in" buffer. Returns 0 if ok else
914 * (DID_ERROR << 16). Can write to offset in data-in buffer. If multiple
915 * calls, not required to write in ascending offset order. Assumes resid
916 * set to scsi_bufflen() prior to any calls.
917 */
918static int p_fill_from_dev_buffer(struct scsi_cmnd *scp, const void *arr,
919 int arr_len, unsigned int off_dst)
920{
921 int act_len, n;
922 struct scsi_data_buffer *sdb = scsi_in(scp);
923 off_t skip = off_dst;
924
925 if (sdb->length <= off_dst)
926 return 0;
927 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
928 return DID_ERROR << 16;
929
930 act_len = sg_pcopy_from_buffer(sdb->table.sgl, sdb->table.nents,
931 arr, arr_len, skip);
932 pr_debug("%s: off_dst=%u, scsi_bufflen=%u, act_len=%u, resid=%d\n",
933 __func__, off_dst, scsi_bufflen(scp), act_len, sdb->resid);
934 n = (int)scsi_bufflen(scp) - ((int)off_dst + act_len);
935 sdb->resid = min(sdb->resid, n);
936 return 0;
937}
938
939/* Fetches from SCSI "data-out" buffer. Returns number of bytes fetched into
940 * 'arr' or -1 if error.
941 */
21a61829
FT		 942static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
943 int arr_len)
1da177e4 944{
21a61829 945 if (!scsi_bufflen(scp))
1da177e4 946 return 0;
072d0bb3 947 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE))
1da177e4 948 return -1;
21a61829
FT		 949
950 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
1da177e4
LT		 951}
952
953
954static const char * inq_vendor_id = "Linux ";
955static const char * inq_product_id = "scsi_debug ";
773642d9 956static const char *inq_product_rev = "0186"; /* version less '.' */
1b37bd60
DG		 957/* Use some locally assigned NAAs for SAS addresses. */
958static const u64 naa3_comp_a = 0x3222222000000000ULL;
959static const u64 naa3_comp_b = 0x3333333000000000ULL;
960static const u64 naa3_comp_c = 0x3111111000000000ULL;
1da177e4 961
cbf67842 962/* Device identification VPD page. Returns number of bytes placed in arr */
760f3b03
DG		 963static int inquiry_vpd_83(unsigned char *arr, int port_group_id,
964 int target_dev_id, int dev_id_num,
09ba24c1
DG		 965 const char *dev_id_str, int dev_id_str_len,
966 const uuid_be *lu_name)
1da177e4 967{
c65b1445
DG		 968 int num, port_a;
969 char b[32];
1da177e4 970
c65b1445 971 port_a = target_dev_id + 1;
1da177e4
LT		 972 /* T10 vendor identifier field format (faked) */
973 arr[0] = 0x2; /* ASCII */
974 arr[1] = 0x1;
975 arr[2] = 0x0;
976 memcpy(&arr[4], inq_vendor_id, 8);
977 memcpy(&arr[12], inq_product_id, 16);
978 memcpy(&arr[28], dev_id_str, dev_id_str_len);
979 num = 8 + 16 + dev_id_str_len;
980 arr[3] = num;
981 num += 4;
c65b1445 982 if (dev_id_num >= 0) {
09ba24c1
DG		 983 if (sdebug_uuid_ctl) {
984 /* Locally assigned UUID */
985 arr[num++] = 0x1; /* binary (not necessarily sas) */
986 arr[num++] = 0xa; /* PIV=0, lu, naa */
987 arr[num++] = 0x0;
988 arr[num++] = 0x12;
989 arr[num++] = 0x10; /* uuid type=1, locally assigned */
990 arr[num++] = 0x0;
991 memcpy(arr + num, lu_name, 16);
992 num += 16;
993 } else {
1b37bd60 994 /* NAA-3, Logical unit identifier (binary) */
09ba24c1
DG		 995 arr[num++] = 0x1; /* binary (not necessarily sas) */
996 arr[num++] = 0x3; /* PIV=0, lu, naa */
997 arr[num++] = 0x0;
998 arr[num++] = 0x8;
1b37bd60 999 put_unaligned_be64(naa3_comp_b + dev_id_num, arr + num);
09ba24c1
DG		 1000 num += 8;
1001 }
c65b1445
DG		 1002 /* Target relative port number */
1003 arr[num++] = 0x61; /* proto=sas, binary */
1004 arr[num++] = 0x94; /* PIV=1, target port, rel port */
1005 arr[num++] = 0x0; /* reserved */
1006 arr[num++] = 0x4; /* length */
1007 arr[num++] = 0x0; /* reserved */
1008 arr[num++] = 0x0; /* reserved */
1009 arr[num++] = 0x0;
1010 arr[num++] = 0x1; /* relative port A */
1011 }
1b37bd60 1012 /* NAA-3, Target port identifier */
c65b1445
DG		 1013 arr[num++] = 0x61; /* proto=sas, binary */
1014 arr[num++] = 0x93; /* piv=1, target port, naa */
1015 arr[num++] = 0x0;
1016 arr[num++] = 0x8;
1b37bd60 1017 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
773642d9 1018 num += 8;
1b37bd60 1019 /* NAA-3, Target port group identifier */
5a09e398
HR		 1020 arr[num++] = 0x61; /* proto=sas, binary */
1021 arr[num++] = 0x95; /* piv=1, target port group id */
1022 arr[num++] = 0x0;
1023 arr[num++] = 0x4;
1024 arr[num++] = 0;
1025 arr[num++] = 0;
773642d9
DG		 1026 put_unaligned_be16(port_group_id, arr + num);
1027 num += 2;
1b37bd60 1028 /* NAA-3, Target device identifier */
c65b1445
DG		 1029 arr[num++] = 0x61; /* proto=sas, binary */
1030 arr[num++] = 0xa3; /* piv=1, target device, naa */
1031 arr[num++] = 0x0;
1032 arr[num++] = 0x8;
1b37bd60 1033 put_unaligned_be64(naa3_comp_a + target_dev_id, arr + num);
773642d9 1034 num += 8;
c65b1445
DG		 1035 /* SCSI name string: Target device identifier */
1036 arr[num++] = 0x63; /* proto=sas, UTF-8 */
1037 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
1038 arr[num++] = 0x0;
1039 arr[num++] = 24;
1b37bd60 1040 memcpy(arr + num, "naa.32222220", 12);
c65b1445
DG		 1041 num += 12;
1042 snprintf(b, sizeof(b), "%08X", target_dev_id);
1043 memcpy(arr + num, b, 8);
1044 num += 8;
1045 memset(arr + num, 0, 4);
1046 num += 4;
1047 return num;
1048}
1049
c65b1445
DG		 1050static unsigned char vpd84_data[] = {
1051/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
1052 0x22,0x22,0x22,0x0,0xbb,0x1,
1053 0x22,0x22,0x22,0x0,0xbb,0x2,
1054};
1055
cbf67842 1056/* Software interface identification VPD page */
760f3b03 1057static int inquiry_vpd_84(unsigned char *arr)
c65b1445
DG		 1058{
1059 memcpy(arr, vpd84_data, sizeof(vpd84_data));
1060 return sizeof(vpd84_data);
1061}
1062
cbf67842 1063/* Management network addresses VPD page */
760f3b03 1064static int inquiry_vpd_85(unsigned char *arr)
c65b1445
DG		 1065{
1066 int num = 0;
1067 const char * na1 = "https://www.kernel.org/config";
1068 const char * na2 = "http://www.kernel.org/log";
1069 int plen, olen;
1070
1071 arr[num++] = 0x1; /* lu, storage config */
1072 arr[num++] = 0x0; /* reserved */
1073 arr[num++] = 0x0;
1074 olen = strlen(na1);
1075 plen = olen + 1;
1076 if (plen % 4)
1077 plen = ((plen / 4) + 1) * 4;
1078 arr[num++] = plen; /* length, null termianted, padded */
1079 memcpy(arr + num, na1, olen);
1080 memset(arr + num + olen, 0, plen - olen);
1081 num += plen;
1082
1083 arr[num++] = 0x4; /* lu, logging */
1084 arr[num++] = 0x0; /* reserved */
1085 arr[num++] = 0x0;
1086 olen = strlen(na2);
1087 plen = olen + 1;
1088 if (plen % 4)
1089 plen = ((plen / 4) + 1) * 4;
1090 arr[num++] = plen; /* length, null terminated, padded */
1091 memcpy(arr + num, na2, olen);
1092 memset(arr + num + olen, 0, plen - olen);
1093 num += plen;
1094
1095 return num;
1096}
1097
1098/* SCSI ports VPD page */
760f3b03 1099static int inquiry_vpd_88(unsigned char *arr, int target_dev_id)
c65b1445
DG		 1100{
1101 int num = 0;
1102 int port_a, port_b;
1103
1104 port_a = target_dev_id + 1;
1105 port_b = port_a + 1;
1106 arr[num++] = 0x0; /* reserved */
1107 arr[num++] = 0x0; /* reserved */
1108 arr[num++] = 0x0;
1109 arr[num++] = 0x1; /* relative port 1 (primary) */
1110 memset(arr + num, 0, 6);
1111 num += 6;
1112 arr[num++] = 0x0;
1113 arr[num++] = 12; /* length tp descriptor */
1114 /* naa-5 target port identifier (A) */
1115 arr[num++] = 0x61; /* proto=sas, binary */
1116 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1117 arr[num++] = 0x0; /* reserved */
1118 arr[num++] = 0x8; /* length */
1b37bd60 1119 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
773642d9 1120 num += 8;
c65b1445
DG		 1121 arr[num++] = 0x0; /* reserved */
1122 arr[num++] = 0x0; /* reserved */
1123 arr[num++] = 0x0;
1124 arr[num++] = 0x2; /* relative port 2 (secondary) */
1125 memset(arr + num, 0, 6);
1126 num += 6;
1127 arr[num++] = 0x0;
1128 arr[num++] = 12; /* length tp descriptor */
1129 /* naa-5 target port identifier (B) */
1130 arr[num++] = 0x61; /* proto=sas, binary */
1131 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1132 arr[num++] = 0x0; /* reserved */
1133 arr[num++] = 0x8; /* length */
1b37bd60 1134 put_unaligned_be64(naa3_comp_a + port_b, arr + num);
773642d9 1135 num += 8;
c65b1445
DG		 1136
1137 return num;
1138}
1139
1140
1141static unsigned char vpd89_data[] = {
1142/* from 4th byte */ 0,0,0,0,
1143'l','i','n','u','x',' ',' ',' ',
1144'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
1145'1','2','3','4',
11460x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
11470xec,0,0,0,
11480x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
11490,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
11500x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
11510x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
11520x53,0x41,
11530x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
11540x20,0x20,
11550x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
11560x10,0x80,
11570,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
11580x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
11590x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
11600,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
11610x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
11620x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
11630,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
11640,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11650,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11660,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11670x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
11680,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
11690xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
11700,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
11710,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11720,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11730,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11740,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11750,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11760,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11770,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11780,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11790,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11800,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11810,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11820,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
1183};
1184
cbf67842 1185/* ATA Information VPD page */
760f3b03 1186static int inquiry_vpd_89(unsigned char *arr)
c65b1445
DG		 1187{
1188 memcpy(arr, vpd89_data, sizeof(vpd89_data));
1189 return sizeof(vpd89_data);
1190}
1191
1192
1193static unsigned char vpdb0_data[] = {
1e49f785
DG		 1194 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
1195 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1196 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1197 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
c65b1445
DG		 1198};
1199
cbf67842 1200/* Block limits VPD page (SBC-3) */
760f3b03 1201static int inquiry_vpd_b0(unsigned char *arr)
c65b1445 1202{
ea61fca5
MP		 1203 unsigned int gran;
1204
c65b1445 1205 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
e308b3d1
MP		 1206
1207 /* Optimal transfer length granularity */
773642d9
DG		 1208 gran = 1 << sdebug_physblk_exp;
1209 put_unaligned_be16(gran, arr + 2);
e308b3d1
MP		 1210
1211 /* Maximum Transfer Length */
773642d9
DG		 1212 if (sdebug_store_sectors > 0x400)
1213 put_unaligned_be32(sdebug_store_sectors, arr + 4);
44d92694 1214
e308b3d1 1215 /* Optimal Transfer Length */
773642d9 1216 put_unaligned_be32(sdebug_opt_blks, &arr[8]);
e308b3d1 1217
773642d9 1218 if (sdebug_lbpu) {
e308b3d1 1219 /* Maximum Unmap LBA Count */
773642d9 1220 put_unaligned_be32(sdebug_unmap_max_blocks, &arr[16]);
e308b3d1
MP		 1221
1222 /* Maximum Unmap Block Descriptor Count */
773642d9 1223 put_unaligned_be32(sdebug_unmap_max_desc, &arr[20]);
44d92694
MP		 1224 }
1225
e308b3d1 1226 /* Unmap Granularity Alignment */
773642d9
DG		 1227 if (sdebug_unmap_alignment) {
1228 put_unaligned_be32(sdebug_unmap_alignment, &arr[28]);
44d92694
MP		 1229 arr[28] |= 0x80; /* UGAVALID */
1230 }
1231
e308b3d1 1232 /* Optimal Unmap Granularity */
773642d9 1233 put_unaligned_be32(sdebug_unmap_granularity, &arr[24]);
6014759c 1234
5b94e232 1235 /* Maximum WRITE SAME Length */
773642d9 1236 put_unaligned_be64(sdebug_write_same_length, &arr[32]);
5b94e232
MP		 1237
1238 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
44d92694 1239
c65b1445 1240 return sizeof(vpdb0_data);
1da177e4
LT		 1241}
1242
1e49f785 1243/* Block device characteristics VPD page (SBC-3) */
760f3b03 1244static int inquiry_vpd_b1(unsigned char *arr)
eac6e8e4
MW		 1245{
1246 memset(arr, 0, 0x3c);
1247 arr[0] = 0;
1e49f785
DG		 1248 arr[1] = 1; /* non rotating medium (e.g. solid state) */
1249 arr[2] = 0;
1250 arr[3] = 5; /* less than 1.8" */
eac6e8e4
MW		 1251
1252 return 0x3c;
1253}
1da177e4 1254
760f3b03
DG		 1255/* Logical block provisioning VPD page (SBC-4) */
1256static int inquiry_vpd_b2(unsigned char *arr)
6014759c 1257{
3f0bc3b3 1258 memset(arr, 0, 0x4);
6014759c 1259 arr[0] = 0; /* threshold exponent */
773642d9 1260 if (sdebug_lbpu)
6014759c 1261 arr[1] = 1 << 7;
773642d9 1262 if (sdebug_lbpws)
6014759c 1263 arr[1] |= 1 << 6;
773642d9 1264 if (sdebug_lbpws10)
5b94e232 1265 arr[1] |= 1 << 5;
760f3b03
DG		 1266 if (sdebug_lbprz && scsi_debug_lbp())
1267 arr[1] |= (sdebug_lbprz & 0x7) << 2; /* sbc4r07 and later */
1268 /* anc_sup=0; dp=0 (no provisioning group descriptor) */
1269 /* minimum_percentage=0; provisioning_type=0 (unknown) */
1270 /* threshold_percentage=0 */
3f0bc3b3 1271 return 0x4;
6014759c
MP		 1272}
1273
1da177e4 1274#define SDEBUG_LONG_INQ_SZ 96
c65b1445 1275#define SDEBUG_MAX_INQ_ARR_SZ 584
1da177e4 1276
c2248fc9 1277static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1da177e4
LT		 1278{
1279 unsigned char pq_pdt;
5a09e398 1280 unsigned char * arr;
01123ef4 1281 unsigned char *cmd = scp->cmnd;
5a09e398 1282 int alloc_len, n, ret;
760f3b03 1283 bool have_wlun, is_disk;
1da177e4 1284
773642d9 1285 alloc_len = get_unaligned_be16(cmd + 3);
6f3cbf55
DG		 1286 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
1287 if (! arr)
1288 return DID_REQUEUE << 16;
760f3b03 1289 is_disk = (sdebug_ptype == TYPE_DISK);
b01f6f83 1290 have_wlun = scsi_is_wlun(scp->device->lun);
c2248fc9 1291 if (have_wlun)
b01f6f83
DG		 1292 pq_pdt = TYPE_WLUN; /* present, wlun */
1293 else if (sdebug_no_lun_0 && (devip->lun == SDEBUG_LUN_0_VAL))
1294 pq_pdt = 0x7f; /* not present, PQ=3, PDT=0x1f */
c65b1445 1295 else
773642d9 1296 pq_pdt = (sdebug_ptype & 0x1f);
1da177e4
LT		 1297 arr[0] = pq_pdt;
1298 if (0x2 & cmd[1]) { /* CMDDT bit set */
22017ed2 1299 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
5a09e398 1300 kfree(arr);
1da177e4
LT		 1301 return check_condition_result;
1302 } else if (0x1 & cmd[1]) { /* EVPD bit set */
5a09e398 1303 int lu_id_num, port_group_id, target_dev_id, len;
c65b1445
DG		 1304 char lu_id_str[6];
1305 int host_no = devip->sdbg_host->shost->host_no;
1da177e4 1306
5a09e398
HR		 1307 port_group_id = (((host_no + 1) & 0x7f) << 8) +
1308 (devip->channel & 0x7f);
b01f6f83 1309 if (sdebug_vpd_use_hostno == 0)
23183910 1310 host_no = 0;
c2248fc9 1311 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) +
c65b1445
DG		 1312 (devip->target * 1000) + devip->lun);
1313 target_dev_id = ((host_no + 1) * 2000) +
1314 (devip->target * 1000) - 3;
1315 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
1da177e4 1316 if (0 == cmd[2]) { /* supported vital product data pages */
c65b1445
DG		 1317 arr[1] = cmd[2]; /*sanity */
1318 n = 4;
1319 arr[n++] = 0x0; /* this page */
1320 arr[n++] = 0x80; /* unit serial number */
1321 arr[n++] = 0x83; /* device identification */
1322 arr[n++] = 0x84; /* software interface ident. */
1323 arr[n++] = 0x85; /* management network addresses */
1324 arr[n++] = 0x86; /* extended inquiry */
1325 arr[n++] = 0x87; /* mode page policy */
1326 arr[n++] = 0x88; /* SCSI ports */
760f3b03
DG		 1327 if (is_disk) { /* SBC only */
1328 arr[n++] = 0x89; /* ATA information */
1329 arr[n++] = 0xb0; /* Block limits */
1330 arr[n++] = 0xb1; /* Block characteristics */
1331 arr[n++] = 0xb2; /* Logical Block Prov */
1332 }
c65b1445 1333 arr[3] = n - 4; /* number of supported VPD pages */
1da177e4 1334 } else if (0x80 == cmd[2]) { /* unit serial number */
c65b1445 1335 arr[1] = cmd[2]; /*sanity */
1da177e4 1336 arr[3] = len;
c65b1445 1337 memcpy(&arr[4], lu_id_str, len);
1da177e4 1338 } else if (0x83 == cmd[2]) { /* device identification */
c65b1445 1339 arr[1] = cmd[2]; /*sanity */
760f3b03
DG		 1340 arr[3] = inquiry_vpd_83(&arr[4], port_group_id,
1341 target_dev_id, lu_id_num,
09ba24c1
DG		 1342 lu_id_str, len,
1343 &devip->lu_name);
c65b1445
DG		 1344 } else if (0x84 == cmd[2]) { /* Software interface ident. */
1345 arr[1] = cmd[2]; /*sanity */
760f3b03 1346 arr[3] = inquiry_vpd_84(&arr[4]);
c65b1445
DG		 1347 } else if (0x85 == cmd[2]) { /* Management network addresses */
1348 arr[1] = cmd[2]; /*sanity */
760f3b03 1349 arr[3] = inquiry_vpd_85(&arr[4]);
c65b1445
DG		 1350 } else if (0x86 == cmd[2]) { /* extended inquiry */
1351 arr[1] = cmd[2]; /*sanity */
1352 arr[3] = 0x3c; /* number of following entries */
8475c811 1353 if (sdebug_dif == T10_PI_TYPE3_PROTECTION)
c6a44287 1354 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
760f3b03 1355 else if (have_dif_prot)
c6a44287
MP		 1356 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
1357 else
1358 arr[4] = 0x0; /* no protection stuff */
c65b1445
DG		 1359 arr[5] = 0x7; /* head of q, ordered + simple q's */
1360 } else if (0x87 == cmd[2]) { /* mode page policy */
1361 arr[1] = cmd[2]; /*sanity */
1362 arr[3] = 0x8; /* number of following entries */
1363 arr[4] = 0x2; /* disconnect-reconnect mp */
1364 arr[6] = 0x80; /* mlus, shared */
1365 arr[8] = 0x18; /* protocol specific lu */
1366 arr[10] = 0x82; /* mlus, per initiator port */
1367 } else if (0x88 == cmd[2]) { /* SCSI Ports */
1368 arr[1] = cmd[2]; /*sanity */
760f3b03
DG		 1369 arr[3] = inquiry_vpd_88(&arr[4], target_dev_id);
1370 } else if (is_disk && 0x89 == cmd[2]) { /* ATA information */
c65b1445 1371 arr[1] = cmd[2]; /*sanity */
760f3b03 1372 n = inquiry_vpd_89(&arr[4]);
773642d9 1373 put_unaligned_be16(n, arr + 2);
760f3b03 1374 } else if (is_disk && 0xb0 == cmd[2]) { /* Block limits */
c65b1445 1375 arr[1] = cmd[2]; /*sanity */
760f3b03
DG		 1376 arr[3] = inquiry_vpd_b0(&arr[4]);
1377 } else if (is_disk && 0xb1 == cmd[2]) { /* Block char. */
eac6e8e4 1378 arr[1] = cmd[2]; /*sanity */
760f3b03
DG		 1379 arr[3] = inquiry_vpd_b1(&arr[4]);
1380 } else if (is_disk && 0xb2 == cmd[2]) { /* LB Prov. */
6014759c 1381 arr[1] = cmd[2]; /*sanity */
760f3b03 1382 arr[3] = inquiry_vpd_b2(&arr[4]);
1da177e4 1383 } else {
22017ed2 1384 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
5a09e398 1385 kfree(arr);
1da177e4
LT		 1386 return check_condition_result;
1387 }
773642d9 1388 len = min(get_unaligned_be16(arr + 2) + 4, alloc_len);
5a09e398 1389 ret = fill_from_dev_buffer(scp, arr,
c65b1445 1390 min(len, SDEBUG_MAX_INQ_ARR_SZ));
5a09e398
HR		 1391 kfree(arr);
1392 return ret;
1da177e4
LT		 1393 }
1394 /* drops through here for a standard inquiry */
773642d9
DG		 1395 arr[1] = sdebug_removable ? 0x80 : 0; /* Removable disk */
1396 arr[2] = sdebug_scsi_level;
1da177e4
LT		 1397 arr[3] = 2; /* response_data_format==2 */
1398 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
f46eb0e9 1399 arr[5] = (int)have_dif_prot; /* PROTECT bit */
b01f6f83 1400 if (sdebug_vpd_use_hostno == 0)
5a09e398 1401 arr[5] = 0x10; /* claim: implicit TGPS */
c65b1445 1402 arr[6] = 0x10; /* claim: MultiP */
1da177e4 1403 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
c65b1445 1404 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
1da177e4
LT		 1405 memcpy(&arr[8], inq_vendor_id, 8);
1406 memcpy(&arr[16], inq_product_id, 16);
1407 memcpy(&arr[32], inq_product_rev, 4);
1408 /* version descriptors (2 bytes each) follow */
760f3b03
DG		 1409 put_unaligned_be16(0xc0, arr + 58); /* SAM-6 no version claimed */
1410 put_unaligned_be16(0x5c0, arr + 60); /* SPC-5 no version claimed */
c65b1445 1411 n = 62;
760f3b03
DG		 1412 if (is_disk) { /* SBC-4 no version claimed */
1413 put_unaligned_be16(0x600, arr + n);
1414 n += 2;
1415 } else if (sdebug_ptype == TYPE_TAPE) { /* SSC-4 rev 3 */
1416 put_unaligned_be16(0x525, arr + n);
1417 n += 2;
1da177e4 1418 }
760f3b03 1419 put_unaligned_be16(0x2100, arr + n); /* SPL-4 no version claimed */
5a09e398 1420 ret = fill_from_dev_buffer(scp, arr,
1da177e4 1421 min(alloc_len, SDEBUG_LONG_INQ_SZ));
5a09e398
HR		 1422 kfree(arr);
1423 return ret;
1da177e4
LT		 1424}
1425
fd32119b
DG		 1426static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1427 0, 0, 0x0, 0x0};
1428
1da177e4
LT		 1429static int resp_requests(struct scsi_cmnd * scp,
1430 struct sdebug_dev_info * devip)
1431{
1432 unsigned char * sbuff;
01123ef4 1433 unsigned char *cmd = scp->cmnd;
cbf67842 1434 unsigned char arr[SCSI_SENSE_BUFFERSIZE];
2492fc09 1435 bool dsense;
1da177e4
LT		 1436 int len = 18;
1437
c65b1445 1438 memset(arr, 0, sizeof(arr));
c2248fc9 1439 dsense = !!(cmd[1] & 1);
cbf67842 1440 sbuff = scp->sense_buffer;
c65b1445 1441 if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
c2248fc9 1442 if (dsense) {
c65b1445
DG		 1443 arr[0] = 0x72;
1444 arr[1] = 0x0; /* NO_SENSE in sense_key */
1445 arr[2] = THRESHOLD_EXCEEDED;
1446 arr[3] = 0xff; /* TEST set and MRIE==6 */
c2248fc9 1447 len = 8;
c65b1445
DG		 1448 } else {
1449 arr[0] = 0x70;
1450 arr[2] = 0x0; /* NO_SENSE in sense_key */
1451 arr[7] = 0xa; /* 18 byte sense buffer */
1452 arr[12] = THRESHOLD_EXCEEDED;
1453 arr[13] = 0xff; /* TEST set and MRIE==6 */
1454 }
c65b1445 1455 } else {
cbf67842 1456 memcpy(arr, sbuff, SCSI_SENSE_BUFFERSIZE);
773642d9 1457 if (arr[0] >= 0x70 && dsense == sdebug_dsense)
c2248fc9
DG		 1458 ; /* have sense and formats match */
1459 else if (arr[0] <= 0x70) {
1460 if (dsense) {
1461 memset(arr, 0, 8);
1462 arr[0] = 0x72;
1463 len = 8;
1464 } else {
1465 memset(arr, 0, 18);
1466 arr[0] = 0x70;
1467 arr[7] = 0xa;
1468 }
1469 } else if (dsense) {
1470 memset(arr, 0, 8);
c65b1445
DG		 1471 arr[0] = 0x72;
1472 arr[1] = sbuff[2]; /* sense key */
1473 arr[2] = sbuff[12]; /* asc */
1474 arr[3] = sbuff[13]; /* ascq */
1475 len = 8;
c2248fc9
DG		 1476 } else {
1477 memset(arr, 0, 18);
1478 arr[0] = 0x70;
1479 arr[2] = sbuff[1];
1480 arr[7] = 0xa;
1481 arr[12] = sbuff[1];
1482 arr[13] = sbuff[3];
c65b1445 1483 }
c2248fc9 1484
c65b1445 1485 }
cbf67842 1486 mk_sense_buffer(scp, 0, NO_ADDITIONAL_SENSE, 0);
1da177e4
LT		 1487 return fill_from_dev_buffer(scp, arr, len);
1488}
1489
c65b1445
DG		 1490static int resp_start_stop(struct scsi_cmnd * scp,
1491 struct sdebug_dev_info * devip)
1492{
01123ef4 1493 unsigned char *cmd = scp->cmnd;
c4837394 1494 int power_cond, stop;
c65b1445 1495
c65b1445
DG		 1496 power_cond = (cmd[4] & 0xf0) >> 4;
1497 if (power_cond) {
22017ed2 1498 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
c65b1445
DG		 1499 return check_condition_result;
1500 }
c4837394
DG		 1501 stop = !(cmd[4] & 1);
1502 atomic_xchg(&devip->stopped, stop);
c65b1445
DG		 1503 return 0;
1504}
1505
28898873
FT		 1506static sector_t get_sdebug_capacity(void)
1507{
773642d9
DG		 1508 static const unsigned int gibibyte = 1073741824;
1509
1510 if (sdebug_virtual_gb > 0)
1511 return (sector_t)sdebug_virtual_gb *
1512 (gibibyte / sdebug_sector_size);
28898873
FT		 1513 else
1514 return sdebug_store_sectors;
1515}
1516
1da177e4
LT		 1517#define SDEBUG_READCAP_ARR_SZ 8
1518static int resp_readcap(struct scsi_cmnd * scp,
1519 struct sdebug_dev_info * devip)
1520{
1521 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
c65b1445 1522 unsigned int capac;
1da177e4 1523
c65b1445 1524 /* following just in case virtual_gb changed */
28898873 1525 sdebug_capacity = get_sdebug_capacity();
1da177e4 1526 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
c65b1445
DG		 1527 if (sdebug_capacity < 0xffffffff) {
1528 capac = (unsigned int)sdebug_capacity - 1;
773642d9
DG		 1529 put_unaligned_be32(capac, arr + 0);
1530 } else
1531 put_unaligned_be32(0xffffffff, arr + 0);
1532 put_unaligned_be16(sdebug_sector_size, arr + 6);
1da177e4
LT		 1533 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1534}
1535
c65b1445
DG		 1536#define SDEBUG_READCAP16_ARR_SZ 32
1537static int resp_readcap16(struct scsi_cmnd * scp,
1538 struct sdebug_dev_info * devip)
1539{
01123ef4 1540 unsigned char *cmd = scp->cmnd;
c65b1445 1541 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
773642d9 1542 int alloc_len;
c65b1445 1543
773642d9 1544 alloc_len = get_unaligned_be32(cmd + 10);
c65b1445 1545 /* following just in case virtual_gb changed */
28898873 1546 sdebug_capacity = get_sdebug_capacity();
c65b1445 1547 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
773642d9
DG		 1548 put_unaligned_be64((u64)(sdebug_capacity - 1), arr + 0);
1549 put_unaligned_be32(sdebug_sector_size, arr + 8);
1550 arr[13] = sdebug_physblk_exp & 0xf;
1551 arr[14] = (sdebug_lowest_aligned >> 8) & 0x3f;
44d92694 1552
be1dd78d 1553 if (scsi_debug_lbp()) {
5b94e232 1554 arr[14] |= 0x80; /* LBPME */
760f3b03
DG		 1555 /* from sbc4r07, this LBPRZ field is 1 bit, but the LBPRZ in
1556 * the LB Provisioning VPD page is 3 bits. Note that lbprz=2
1557 * in the wider field maps to 0 in this field.
1558 */
1559 if (sdebug_lbprz & 1) /* precisely what the draft requires */
1560 arr[14] |= 0x40;
be1dd78d 1561 }
44d92694 1562
773642d9 1563 arr[15] = sdebug_lowest_aligned & 0xff;
c6a44287 1564
760f3b03 1565 if (have_dif_prot) {
773642d9 1566 arr[12] = (sdebug_dif - 1) << 1; /* P_TYPE */
c6a44287
MP		 1567 arr[12] |= 1; /* PROT_EN */
1568 }
1569
c65b1445
DG		 1570 return fill_from_dev_buffer(scp, arr,
1571 min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
1572}
1573
5a09e398
HR		 1574#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1575
1576static int resp_report_tgtpgs(struct scsi_cmnd * scp,
1577 struct sdebug_dev_info * devip)
1578{
01123ef4 1579 unsigned char *cmd = scp->cmnd;
5a09e398
HR		 1580 unsigned char * arr;
1581 int host_no = devip->sdbg_host->shost->host_no;
1582 int n, ret, alen, rlen;
1583 int port_group_a, port_group_b, port_a, port_b;
1584
773642d9 1585 alen = get_unaligned_be32(cmd + 6);
6f3cbf55
DG		 1586 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1587 if (! arr)
1588 return DID_REQUEUE << 16;
5a09e398
HR		 1589 /*
1590 * EVPD page 0x88 states we have two ports, one
1591 * real and a fake port with no device connected.
1592 * So we create two port groups with one port each
1593 * and set the group with port B to unavailable.
1594 */
1595 port_a = 0x1; /* relative port A */
1596 port_b = 0x2; /* relative port B */
1597 port_group_a = (((host_no + 1) & 0x7f) << 8) +
773642d9 1598 (devip->channel & 0x7f);
5a09e398 1599 port_group_b = (((host_no + 1) & 0x7f) << 8) +
773642d9 1600 (devip->channel & 0x7f) + 0x80;
5a09e398
HR		 1601
1602 /*
1603 * The asymmetric access state is cycled according to the host_id.
1604 */
1605 n = 4;
b01f6f83 1606 if (sdebug_vpd_use_hostno == 0) {
773642d9
DG		 1607 arr[n++] = host_no % 3; /* Asymm access state */
1608 arr[n++] = 0x0F; /* claim: all states are supported */
5a09e398 1609 } else {
773642d9
DG		 1610 arr[n++] = 0x0; /* Active/Optimized path */
1611 arr[n++] = 0x01; /* only support active/optimized paths */
5a09e398 1612 }
773642d9
DG		 1613 put_unaligned_be16(port_group_a, arr + n);
1614 n += 2;
5a09e398
HR		 1615 arr[n++] = 0; /* Reserved */
1616 arr[n++] = 0; /* Status code */
1617 arr[n++] = 0; /* Vendor unique */
1618 arr[n++] = 0x1; /* One port per group */
1619 arr[n++] = 0; /* Reserved */
1620 arr[n++] = 0; /* Reserved */
773642d9
DG		 1621 put_unaligned_be16(port_a, arr + n);
1622 n += 2;
5a09e398
HR		 1623 arr[n++] = 3; /* Port unavailable */
1624 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
773642d9
DG		 1625 put_unaligned_be16(port_group_b, arr + n);
1626 n += 2;
5a09e398
HR		 1627 arr[n++] = 0; /* Reserved */
1628 arr[n++] = 0; /* Status code */
1629 arr[n++] = 0; /* Vendor unique */
1630 arr[n++] = 0x1; /* One port per group */
1631 arr[n++] = 0; /* Reserved */
1632 arr[n++] = 0; /* Reserved */
773642d9
DG		 1633 put_unaligned_be16(port_b, arr + n);
1634 n += 2;
5a09e398
HR		 1635
1636 rlen = n - 4;
773642d9 1637 put_unaligned_be32(rlen, arr + 0);
5a09e398
HR		 1638
1639 /*
1640 * Return the smallest value of either
1641 * - The allocated length
1642 * - The constructed command length
1643 * - The maximum array size
1644 */
1645 rlen = min(alen,n);
1646 ret = fill_from_dev_buffer(scp, arr,
1647 min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1648 kfree(arr);
1649 return ret;
1650}
1651
fd32119b
DG		 1652static int resp_rsup_opcodes(struct scsi_cmnd *scp,
1653 struct sdebug_dev_info *devip)
38d5c833
DG		 1654{
1655 bool rctd;
1656 u8 reporting_opts, req_opcode, sdeb_i, supp;
1657 u16 req_sa, u;
1658 u32 alloc_len, a_len;
1659 int k, offset, len, errsts, count, bump, na;
1660 const struct opcode_info_t *oip;
1661 const struct opcode_info_t *r_oip;
1662 u8 *arr;
1663 u8 *cmd = scp->cmnd;
1664
1665 rctd = !!(cmd[2] & 0x80);
1666 reporting_opts = cmd[2] & 0x7;
1667 req_opcode = cmd[3];
1668 req_sa = get_unaligned_be16(cmd + 4);
1669 alloc_len = get_unaligned_be32(cmd + 6);
6d310dfb 1670 if (alloc_len < 4 || alloc_len > 0xffff) {
38d5c833
DG		 1671 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1672 return check_condition_result;
1673 }
1674 if (alloc_len > 8192)
1675 a_len = 8192;
1676 else
1677 a_len = alloc_len;
99531e60 1678 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC);
38d5c833
DG		 1679 if (NULL == arr) {
1680 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
1681 INSUFF_RES_ASCQ);
1682 return check_condition_result;
1683 }
1684 switch (reporting_opts) {
1685 case 0: /* all commands */
1686 /* count number of commands */
1687 for (count = 0, oip = opcode_info_arr;
1688 oip->num_attached != 0xff; ++oip) {
1689 if (F_INV_OP & oip->flags)
1690 continue;
1691 count += (oip->num_attached + 1);
1692 }
1693 bump = rctd ? 20 : 8;
1694 put_unaligned_be32(count * bump, arr);
1695 for (offset = 4, oip = opcode_info_arr;
1696 oip->num_attached != 0xff && offset < a_len; ++oip) {
1697 if (F_INV_OP & oip->flags)
1698 continue;
1699 na = oip->num_attached;
1700 arr[offset] = oip->opcode;
1701 put_unaligned_be16(oip->sa, arr + offset + 2);
1702 if (rctd)
1703 arr[offset + 5] |= 0x2;
1704 if (FF_SA & oip->flags)
1705 arr[offset + 5] |= 0x1;
1706 put_unaligned_be16(oip->len_mask[0], arr + offset + 6);
1707 if (rctd)
1708 put_unaligned_be16(0xa, arr + offset + 8);
1709 r_oip = oip;
1710 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) {
1711 if (F_INV_OP & oip->flags)
1712 continue;
1713 offset += bump;
1714 arr[offset] = oip->opcode;
1715 put_unaligned_be16(oip->sa, arr + offset + 2);
1716 if (rctd)
1717 arr[offset + 5] |= 0x2;
1718 if (FF_SA & oip->flags)
1719 arr[offset + 5] |= 0x1;
1720 put_unaligned_be16(oip->len_mask[0],
1721 arr + offset + 6);
1722 if (rctd)
1723 put_unaligned_be16(0xa,
1724 arr + offset + 8);
1725 }
1726 oip = r_oip;
1727 offset += bump;
1728 }
1729 break;
1730 case 1: /* one command: opcode only */
1731 case 2: /* one command: opcode plus service action */
1732 case 3: /* one command: if sa==0 then opcode only else opcode+sa */
1733 sdeb_i = opcode_ind_arr[req_opcode];
1734 oip = &opcode_info_arr[sdeb_i];
1735 if (F_INV_OP & oip->flags) {
1736 supp = 1;
1737 offset = 4;
1738 } else {
1739 if (1 == reporting_opts) {
1740 if (FF_SA & oip->flags) {
1741 mk_sense_invalid_fld(scp, SDEB_IN_CDB,
1742 2, 2);
1743 kfree(arr);
1744 return check_condition_result;
1745 }
1746 req_sa = 0;
1747 } else if (2 == reporting_opts &&
1748 0 == (FF_SA & oip->flags)) {
1749 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
1750 kfree(arr); /* point at requested sa */
1751 return check_condition_result;
1752 }
1753 if (0 == (FF_SA & oip->flags) &&
1754 req_opcode == oip->opcode)
1755 supp = 3;
1756 else if (0 == (FF_SA & oip->flags)) {
1757 na = oip->num_attached;
1758 for (k = 0, oip = oip->arrp; k < na;
1759 ++k, ++oip) {
1760 if (req_opcode == oip->opcode)
1761 break;
1762 }
1763 supp = (k >= na) ? 1 : 3;
1764 } else if (req_sa != oip->sa) {
1765 na = oip->num_attached;
1766 for (k = 0, oip = oip->arrp; k < na;
1767 ++k, ++oip) {
1768 if (req_sa == oip->sa)
1769 break;
1770 }
1771 supp = (k >= na) ? 1 : 3;
1772 } else
1773 supp = 3;
1774 if (3 == supp) {
1775 u = oip->len_mask[0];
1776 put_unaligned_be16(u, arr + 2);
1777 arr[4] = oip->opcode;
1778 for (k = 1; k < u; ++k)
1779 arr[4 + k] = (k < 16) ?
1780 oip->len_mask[k] : 0xff;
1781 offset = 4 + u;
1782 } else
1783 offset = 4;
1784 }
1785 arr[1] = (rctd ? 0x80 : 0) | supp;
1786 if (rctd) {
1787 put_unaligned_be16(0xa, arr + offset);
1788 offset += 12;
1789 }
1790 break;
1791 default:
1792 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
1793 kfree(arr);
1794 return check_condition_result;
1795 }
1796 offset = (offset < a_len) ? offset : a_len;
1797 len = (offset < alloc_len) ? offset : alloc_len;
1798 errsts = fill_from_dev_buffer(scp, arr, len);
1799 kfree(arr);
1800 return errsts;
1801}
1802
fd32119b
DG		 1803static int resp_rsup_tmfs(struct scsi_cmnd *scp,
1804 struct sdebug_dev_info *devip)
38d5c833
DG		 1805{
1806 bool repd;
1807 u32 alloc_len, len;
1808 u8 arr[16];
1809 u8 *cmd = scp->cmnd;
1810
1811 memset(arr, 0, sizeof(arr));
1812 repd = !!(cmd[2] & 0x80);
1813 alloc_len = get_unaligned_be32(cmd + 6);
1814 if (alloc_len < 4) {
1815 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1816 return check_condition_result;
1817 }
1818 arr[0] = 0xc8; /* ATS | ATSS | LURS */
1819 arr[1] = 0x1; /* ITNRS */
1820 if (repd) {
1821 arr[3] = 0xc;
1822 len = 16;
1823 } else
1824 len = 4;
1825
1826 len = (len < alloc_len) ? len : alloc_len;
1827 return fill_from_dev_buffer(scp, arr, len);
1828}
1829
1da177e4
LT		 1830/* <<Following mode page info copied from ST318451LW>> */
1831
1832static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target)
1833{ /* Read-Write Error Recovery page for mode_sense */
1834 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
1835 5, 0, 0xff, 0xff};
1836
1837 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
1838 if (1 == pcontrol)
1839 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
1840 return sizeof(err_recov_pg);
1841}
1842
1843static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target)
1844{ /* Disconnect-Reconnect page for mode_sense */
1845 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
1846 0, 0, 0, 0, 0, 0, 0, 0};
1847
1848 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
1849 if (1 == pcontrol)
1850 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
1851 return sizeof(disconnect_pg);
1852}
1853
1854static int resp_format_pg(unsigned char * p, int pcontrol, int target)
1855{ /* Format device page for mode_sense */
597136ab
MP		 1856 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
1857 0, 0, 0, 0, 0, 0, 0, 0,
1858 0, 0, 0, 0, 0x40, 0, 0, 0};
1859
1860 memcpy(p, format_pg, sizeof(format_pg));
773642d9
DG		 1861 put_unaligned_be16(sdebug_sectors_per, p + 10);
1862 put_unaligned_be16(sdebug_sector_size, p + 12);
1863 if (sdebug_removable)
597136ab
MP		 1864 p[20] |= 0x20; /* should agree with INQUIRY */
1865 if (1 == pcontrol)
1866 memset(p + 2, 0, sizeof(format_pg) - 2);
1867 return sizeof(format_pg);
1da177e4
LT		 1868}
1869
fd32119b
DG		 1870static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
1871 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
1872 0, 0, 0, 0};
1873
1da177e4
LT		 1874static int resp_caching_pg(unsigned char * p, int pcontrol, int target)
1875{ /* Caching page for mode_sense */
cbf67842
DG		 1876 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
1877 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
1878 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
1da177e4
LT		 1879 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
1880
773642d9 1881 if (SDEBUG_OPT_N_WCE & sdebug_opts)
cbf67842 1882 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
1da177e4
LT		 1883 memcpy(p, caching_pg, sizeof(caching_pg));
1884 if (1 == pcontrol)
cbf67842
DG		 1885 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
1886 else if (2 == pcontrol)
1887 memcpy(p, d_caching_pg, sizeof(d_caching_pg));
1da177e4
LT		 1888 return sizeof(caching_pg);
1889}
1890
fd32119b
DG		 1891static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
1892 0, 0, 0x2, 0x4b};
1893
1da177e4
LT		 1894static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
1895{ /* Control mode page for mode_sense */
c65b1445
DG		 1896 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
1897 0, 0, 0, 0};
1898 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
1da177e4
LT		 1899 0, 0, 0x2, 0x4b};
1900
773642d9 1901 if (sdebug_dsense)
1da177e4 1902 ctrl_m_pg[2] |= 0x4;
c65b1445
DG		 1903 else
1904 ctrl_m_pg[2] &= ~0x4;
c6a44287 1905
773642d9 1906 if (sdebug_ato)
c6a44287
MP		 1907 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
1908
1da177e4
LT		 1909 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
1910 if (1 == pcontrol)
c65b1445
DG		 1911 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
1912 else if (2 == pcontrol)
1913 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
1da177e4
LT		 1914 return sizeof(ctrl_m_pg);
1915}
1916
c65b1445 1917
1da177e4
LT		 1918static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target)
1919{ /* Informational Exceptions control mode page for mode_sense */
c65b1445
DG		 1920 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
1921 0, 0, 0x0, 0x0};
1922 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1923 0, 0, 0x0, 0x0};
1924
1da177e4
LT		 1925 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
1926 if (1 == pcontrol)
c65b1445
DG		 1927 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
1928 else if (2 == pcontrol)
1929 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
1da177e4
LT		 1930 return sizeof(iec_m_pg);
1931}
1932
c65b1445
DG		 1933static int resp_sas_sf_m_pg(unsigned char * p, int pcontrol, int target)
1934{ /* SAS SSP mode page - short format for mode_sense */
1935 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
1936 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
1937
1938 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
1939 if (1 == pcontrol)
1940 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
1941 return sizeof(sas_sf_m_pg);
1942}
1943
1944
1945static int resp_sas_pcd_m_spg(unsigned char * p, int pcontrol, int target,
1946 int target_dev_id)
1947{ /* SAS phy control and discover mode page for mode_sense */
1948 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
1949 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
773642d9
DG		 1950 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
1951 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
c65b1445
DG		 1952 0x2, 0, 0, 0, 0, 0, 0, 0,
1953 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1954 0, 0, 0, 0, 0, 0, 0, 0,
1955 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
773642d9
DG		 1956 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
1957 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
c65b1445
DG		 1958 0x3, 0, 0, 0, 0, 0, 0, 0,
1959 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1960 0, 0, 0, 0, 0, 0, 0, 0,
1961 };
1962 int port_a, port_b;
1963
1b37bd60
DG		 1964 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 16);
1965 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 24);
1966 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 64);
1967 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 72);
c65b1445
DG		 1968 port_a = target_dev_id + 1;
1969 port_b = port_a + 1;
1970 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
773642d9
DG		 1971 put_unaligned_be32(port_a, p + 20);
1972 put_unaligned_be32(port_b, p + 48 + 20);
c65b1445
DG		 1973 if (1 == pcontrol)
1974 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
1975 return sizeof(sas_pcd_m_pg);
1976}
1977
1978static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol)
1979{ /* SAS SSP shared protocol specific port mode subpage */
1980 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
1981 0, 0, 0, 0, 0, 0, 0, 0,
1982 };
1983
1984 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
1985 if (1 == pcontrol)
1986 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
1987 return sizeof(sas_sha_m_pg);
1988}
1989
1da177e4
LT		 1990#define SDEBUG_MAX_MSENSE_SZ 256
1991
fd32119b
DG		 1992static int resp_mode_sense(struct scsi_cmnd *scp,
1993 struct sdebug_dev_info *devip)
1da177e4 1994{
23183910 1995 int pcontrol, pcode, subpcode, bd_len;
1da177e4 1996 unsigned char dev_spec;
760f3b03 1997 int alloc_len, offset, len, target_dev_id;
c2248fc9 1998 int target = scp->device->id;
1da177e4
LT		 1999 unsigned char * ap;
2000 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
01123ef4 2001 unsigned char *cmd = scp->cmnd;
760f3b03 2002 bool dbd, llbaa, msense_6, is_disk, bad_pcode;
1da177e4 2003
760f3b03 2004 dbd = !!(cmd[1] & 0x8); /* disable block descriptors */
1da177e4
LT		 2005 pcontrol = (cmd[2] & 0xc0) >> 6;
2006 pcode = cmd[2] & 0x3f;
2007 subpcode = cmd[3];
2008 msense_6 = (MODE_SENSE == cmd[0]);
760f3b03
DG		 2009 llbaa = msense_6 ? false : !!(cmd[1] & 0x10);
2010 is_disk = (sdebug_ptype == TYPE_DISK);
2011 if (is_disk && !dbd)
23183910
DG		 2012 bd_len = llbaa ? 16 : 8;
2013 else
2014 bd_len = 0;
773642d9 2015 alloc_len = msense_6 ? cmd[4] : get_unaligned_be16(cmd + 7);
1da177e4
LT		 2016 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
2017 if (0x3 == pcontrol) { /* Saving values not supported */
cbf67842 2018 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
1da177e4
LT		 2019 return check_condition_result;
2020 }
c65b1445
DG		 2021 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
2022 (devip->target * 1000) - 3;
b01f6f83 2023 /* for disks set DPOFUA bit and clear write protect (WP) bit */
760f3b03 2024 if (is_disk)
b01f6f83 2025 dev_spec = 0x10; /* =0x90 if WP=1 implies read-only */
23183910
DG		 2026 else
2027 dev_spec = 0x0;
1da177e4
LT		 2028 if (msense_6) {
2029 arr[2] = dev_spec;
23183910 2030 arr[3] = bd_len;
1da177e4
LT		 2031 offset = 4;
2032 } else {
2033 arr[3] = dev_spec;
23183910
DG		 2034 if (16 == bd_len)
2035 arr[4] = 0x1; /* set LONGLBA bit */
2036 arr[7] = bd_len; /* assume 255 or less */
1da177e4
LT		 2037 offset = 8;
2038 }
2039 ap = arr + offset;
28898873
FT		 2040 if ((bd_len > 0) && (!sdebug_capacity))
2041 sdebug_capacity = get_sdebug_capacity();
2042
23183910 2043 if (8 == bd_len) {
773642d9
DG		 2044 if (sdebug_capacity > 0xfffffffe)
2045 put_unaligned_be32(0xffffffff, ap + 0);
2046 else
2047 put_unaligned_be32(sdebug_capacity, ap + 0);
2048 put_unaligned_be16(sdebug_sector_size, ap + 6);
23183910
DG		 2049 offset += bd_len;
2050 ap = arr + offset;
2051 } else if (16 == bd_len) {
773642d9
DG		 2052 put_unaligned_be64((u64)sdebug_capacity, ap + 0);
2053 put_unaligned_be32(sdebug_sector_size, ap + 12);
23183910
DG		 2054 offset += bd_len;
2055 ap = arr + offset;
2056 }
1da177e4 2057
c65b1445
DG		 2058 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
2059 /* TODO: Control Extension page */
22017ed2 2060 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
1da177e4
LT		 2061 return check_condition_result;
2062 }
760f3b03
DG		 2063 bad_pcode = false;
2064
1da177e4
LT		 2065 switch (pcode) {
2066 case 0x1: /* Read-Write error recovery page, direct access */
2067 len = resp_err_recov_pg(ap, pcontrol, target);
2068 offset += len;
2069 break;
2070 case 0x2: /* Disconnect-Reconnect page, all devices */
2071 len = resp_disconnect_pg(ap, pcontrol, target);
2072 offset += len;
2073 break;
2074 case 0x3: /* Format device page, direct access */
760f3b03
DG		 2075 if (is_disk) {
2076 len = resp_format_pg(ap, pcontrol, target);
2077 offset += len;
2078 } else
2079 bad_pcode = true;
1da177e4
LT		 2080 break;
2081 case 0x8: /* Caching page, direct access */
760f3b03
DG		 2082 if (is_disk) {
2083 len = resp_caching_pg(ap, pcontrol, target);
2084 offset += len;
2085 } else
2086 bad_pcode = true;
1da177e4
LT		 2087 break;
2088 case 0xa: /* Control Mode page, all devices */
2089 len = resp_ctrl_m_pg(ap, pcontrol, target);
2090 offset += len;
2091 break;
c65b1445
DG		 2092 case 0x19: /* if spc==1 then sas phy, control+discover */
2093 if ((subpcode > 0x2) && (subpcode < 0xff)) {
22017ed2 2094 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
c65b1445
DG		 2095 return check_condition_result;
2096 }
2097 len = 0;
2098 if ((0x0 == subpcode) || (0xff == subpcode))
2099 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2100 if ((0x1 == subpcode) || (0xff == subpcode))
2101 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
2102 target_dev_id);
2103 if ((0x2 == subpcode) || (0xff == subpcode))
2104 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2105 offset += len;
2106 break;
1da177e4
LT		 2107 case 0x1c: /* Informational Exceptions Mode page, all devices */
2108 len = resp_iec_m_pg(ap, pcontrol, target);
2109 offset += len;
2110 break;
2111 case 0x3f: /* Read all Mode pages */
c65b1445
DG		 2112 if ((0 == subpcode) || (0xff == subpcode)) {
2113 len = resp_err_recov_pg(ap, pcontrol, target);
2114 len += resp_disconnect_pg(ap + len, pcontrol, target);
760f3b03
DG		 2115 if (is_disk) {
2116 len += resp_format_pg(ap + len, pcontrol,
2117 target);
2118 len += resp_caching_pg(ap + len, pcontrol,
2119 target);
2120 }
c65b1445
DG		 2121 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
2122 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2123 if (0xff == subpcode) {
2124 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
2125 target, target_dev_id);
2126 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2127 }
2128 len += resp_iec_m_pg(ap + len, pcontrol, target);
760f3b03 2129 offset += len;
c65b1445 2130 } else {
22017ed2 2131 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
c65b1445
DG		 2132 return check_condition_result;
2133 }
1da177e4
LT		 2134 break;
2135 default:
760f3b03
DG		 2136 bad_pcode = true;
2137 break;
2138 }
2139 if (bad_pcode) {
22017ed2 2140 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
1da177e4
LT		 2141 return check_condition_result;
2142 }
2143 if (msense_6)
2144 arr[0] = offset - 1;
773642d9
DG		 2145 else
2146 put_unaligned_be16((offset - 2), arr + 0);
1da177e4
LT		 2147 return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
2148}
2149
c65b1445
DG		 2150#define SDEBUG_MAX_MSELECT_SZ 512
2151
fd32119b
DG		 2152static int resp_mode_select(struct scsi_cmnd *scp,
2153 struct sdebug_dev_info *devip)
c65b1445
DG		 2154{
2155 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
c2248fc9 2156 int param_len, res, mpage;
c65b1445 2157 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
01123ef4 2158 unsigned char *cmd = scp->cmnd;
c2248fc9 2159 int mselect6 = (MODE_SELECT == cmd[0]);
c65b1445 2160
c65b1445
DG		 2161 memset(arr, 0, sizeof(arr));
2162 pf = cmd[1] & 0x10;
2163 sp = cmd[1] & 0x1;
773642d9 2164 param_len = mselect6 ? cmd[4] : get_unaligned_be16(cmd + 7);
c65b1445 2165 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
22017ed2 2166 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1);
c65b1445
DG		 2167 return check_condition_result;
2168 }
2169 res = fetch_to_dev_buffer(scp, arr, param_len);
2170 if (-1 == res)
773642d9
DG		 2171 return DID_ERROR << 16;
2172 else if (sdebug_verbose && (res < param_len))
cbf67842
DG		 2173 sdev_printk(KERN_INFO, scp->device,
2174 "%s: cdb indicated=%d, IO sent=%d bytes\n",
2175 __func__, param_len, res);
773642d9
DG		 2176 md_len = mselect6 ? (arr[0] + 1) : (get_unaligned_be16(arr + 0) + 2);
2177 bd_len = mselect6 ? arr[3] : get_unaligned_be16(arr + 6);
23183910 2178 if (md_len > 2) {
22017ed2 2179 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1);
c65b1445
DG		 2180 return check_condition_result;
2181 }
2182 off = bd_len + (mselect6 ? 4 : 8);
2183 mpage = arr[off] & 0x3f;
2184 ps = !!(arr[off] & 0x80);
2185 if (ps) {
22017ed2 2186 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7);
c65b1445
DG		 2187 return check_condition_result;
2188 }
2189 spf = !!(arr[off] & 0x40);
773642d9 2190 pg_len = spf ? (get_unaligned_be16(arr + off + 2) + 4) :
c65b1445
DG		 2191 (arr[off + 1] + 2);
2192 if ((pg_len + off) > param_len) {
cbf67842 2193 mk_sense_buffer(scp, ILLEGAL_REQUEST,
c65b1445
DG		 2194 PARAMETER_LIST_LENGTH_ERR, 0);
2195 return check_condition_result;
2196 }
2197 switch (mpage) {
cbf67842
DG		 2198 case 0x8: /* Caching Mode page */
2199 if (caching_pg[1] == arr[off + 1]) {
2200 memcpy(caching_pg + 2, arr + off + 2,
2201 sizeof(caching_pg) - 2);
2202 goto set_mode_changed_ua;
2203 }
2204 break;
c65b1445
DG		 2205 case 0xa: /* Control Mode page */
2206 if (ctrl_m_pg[1] == arr[off + 1]) {
2207 memcpy(ctrl_m_pg + 2, arr + off + 2,
2208 sizeof(ctrl_m_pg) - 2);
773642d9 2209 sdebug_dsense = !!(ctrl_m_pg[2] & 0x4);
cbf67842 2210 goto set_mode_changed_ua;
c65b1445
DG		 2211 }
2212 break;
2213 case 0x1c: /* Informational Exceptions Mode page */
2214 if (iec_m_pg[1] == arr[off + 1]) {
2215 memcpy(iec_m_pg + 2, arr + off + 2,
2216 sizeof(iec_m_pg) - 2);
cbf67842 2217 goto set_mode_changed_ua;
c65b1445
DG		 2218 }
2219 break;
2220 default:
2221 break;
2222 }
22017ed2 2223 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5);
c65b1445 2224 return check_condition_result;
cbf67842
DG		 2225set_mode_changed_ua:
2226 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
2227 return 0;
c65b1445
DG		 2228}
2229
2230static int resp_temp_l_pg(unsigned char * arr)
2231{
2232 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
2233 0x0, 0x1, 0x3, 0x2, 0x0, 65,
2234 };
2235
2236 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
2237 return sizeof(temp_l_pg);
2238}
2239
2240static int resp_ie_l_pg(unsigned char * arr)
2241{
2242 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
2243 };
2244
2245 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
2246 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
2247 arr[4] = THRESHOLD_EXCEEDED;
2248 arr[5] = 0xff;
2249 }
2250 return sizeof(ie_l_pg);
2251}
2252
2253#define SDEBUG_MAX_LSENSE_SZ 512
2254
2255static int resp_log_sense(struct scsi_cmnd * scp,
2256 struct sdebug_dev_info * devip)
2257{
c2248fc9 2258 int ppc, sp, pcontrol, pcode, subpcode, alloc_len, len, n;
c65b1445 2259 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
01123ef4 2260 unsigned char *cmd = scp->cmnd;
c65b1445 2261
c65b1445
DG		 2262 memset(arr, 0, sizeof(arr));
2263 ppc = cmd[1] & 0x2;
2264 sp = cmd[1] & 0x1;
2265 if (ppc || sp) {
22017ed2 2266 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0);
c65b1445
DG		 2267 return check_condition_result;
2268 }
2269 pcontrol = (cmd[2] & 0xc0) >> 6;
2270 pcode = cmd[2] & 0x3f;
23183910 2271 subpcode = cmd[3] & 0xff;
773642d9 2272 alloc_len = get_unaligned_be16(cmd + 7);
c65b1445 2273 arr[0] = pcode;
23183910
DG		 2274 if (0 == subpcode) {
2275 switch (pcode) {
2276 case 0x0: /* Supported log pages log page */
2277 n = 4;
2278 arr[n++] = 0x0; /* this page */
2279 arr[n++] = 0xd; /* Temperature */
2280 arr[n++] = 0x2f; /* Informational exceptions */
2281 arr[3] = n - 4;
2282 break;
2283 case 0xd: /* Temperature log page */
2284 arr[3] = resp_temp_l_pg(arr + 4);
2285 break;
2286 case 0x2f: /* Informational exceptions log page */
2287 arr[3] = resp_ie_l_pg(arr + 4);
2288 break;
2289 default:
22017ed2 2290 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
23183910
DG		 2291 return check_condition_result;
2292 }
2293 } else if (0xff == subpcode) {
2294 arr[0] |= 0x40;
2295 arr[1] = subpcode;
2296 switch (pcode) {
2297 case 0x0: /* Supported log pages and subpages log page */
2298 n = 4;
2299 arr[n++] = 0x0;
2300 arr[n++] = 0x0; /* 0,0 page */
2301 arr[n++] = 0x0;
2302 arr[n++] = 0xff; /* this page */
2303 arr[n++] = 0xd;
2304 arr[n++] = 0x0; /* Temperature */
2305 arr[n++] = 0x2f;
2306 arr[n++] = 0x0; /* Informational exceptions */
2307 arr[3] = n - 4;
2308 break;
2309 case 0xd: /* Temperature subpages */
2310 n = 4;
2311 arr[n++] = 0xd;
2312 arr[n++] = 0x0; /* Temperature */
2313 arr[3] = n - 4;
2314 break;
2315 case 0x2f: /* Informational exceptions subpages */
2316 n = 4;
2317 arr[n++] = 0x2f;
2318 arr[n++] = 0x0; /* Informational exceptions */
2319 arr[3] = n - 4;
2320 break;
2321 default:
22017ed2 2322 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
23183910
DG		 2323 return check_condition_result;
2324 }
2325 } else {
22017ed2 2326 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
c65b1445
DG		 2327 return check_condition_result;
2328 }
773642d9 2329 len = min(get_unaligned_be16(arr + 2) + 4, alloc_len);
c65b1445
DG		 2330 return fill_from_dev_buffer(scp, arr,
2331 min(len, SDEBUG_MAX_INQ_ARR_SZ));
2332}
2333
cbf67842 2334static int check_device_access_params(struct scsi_cmnd *scp,
19789100 2335 unsigned long long lba, unsigned int num)
1da177e4 2336{
c65b1445 2337 if (lba + num > sdebug_capacity) {
22017ed2 2338 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
1da177e4
LT		 2339 return check_condition_result;
2340 }
c65b1445
DG		 2341 /* transfer length excessive (tie in to block limits VPD page) */
2342 if (num > sdebug_store_sectors) {
22017ed2 2343 /* needs work to find which cdb byte 'num' comes from */
cbf67842 2344 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
c65b1445
DG		 2345 return check_condition_result;
2346 }
19789100
FT		 2347 return 0;
2348}
2349
a4517511 2350/* Returns number of bytes copied or -1 if error. */
fd32119b
DG		 2351static int do_device_access(struct scsi_cmnd *scmd, u64 lba, u32 num,
2352 bool do_write)
19789100
FT		 2353{
2354 int ret;
c2248fc9 2355 u64 block, rest = 0;
a4517511
AM		 2356 struct scsi_data_buffer *sdb;
2357 enum dma_data_direction dir;
a4517511 2358
c2248fc9 2359 if (do_write) {
a4517511
AM		 2360 sdb = scsi_out(scmd);
2361 dir = DMA_TO_DEVICE;
a4517511
AM		 2362 } else {
2363 sdb = scsi_in(scmd);
2364 dir = DMA_FROM_DEVICE;
a4517511 2365 }
19789100 2366
a4517511
AM		 2367 if (!sdb->length)
2368 return 0;
2369 if (!(scsi_bidi_cmnd(scmd) || scmd->sc_data_direction == dir))
2370 return -1;
19789100
FT		 2371
2372 block = do_div(lba, sdebug_store_sectors);
2373 if (block + num > sdebug_store_sectors)
2374 rest = block + num - sdebug_store_sectors;
2375
386ecb12 2376 ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
773642d9
DG		 2377 fake_storep + (block * sdebug_sector_size),
2378 (num - rest) * sdebug_sector_size, 0, do_write);
2379 if (ret != (num - rest) * sdebug_sector_size)
a4517511
AM		 2380 return ret;
2381
2382 if (rest) {
386ecb12 2383 ret += sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
773642d9
DG		 2384 fake_storep, rest * sdebug_sector_size,
2385 (num - rest) * sdebug_sector_size, do_write);
a4517511 2386 }
19789100
FT		 2387
2388 return ret;
2389}
2390
38d5c833
DG		 2391/* If fake_store(lba,num) compares equal to arr(num), then copy top half of
2392 * arr into fake_store(lba,num) and return true. If comparison fails then
2393 * return false. */
fd32119b 2394static bool comp_write_worker(u64 lba, u32 num, const u8 *arr)
38d5c833
DG		 2395{
2396 bool res;
2397 u64 block, rest = 0;
2398 u32 store_blks = sdebug_store_sectors;
773642d9 2399 u32 lb_size = sdebug_sector_size;
38d5c833
DG		 2400
2401 block = do_div(lba, store_blks);
2402 if (block + num > store_blks)
2403 rest = block + num - store_blks;
2404
2405 res = !memcmp(fake_storep + (block * lb_size), arr,
2406 (num - rest) * lb_size);
2407 if (!res)
2408 return res;
2409 if (rest)
2410 res = memcmp(fake_storep, arr + ((num - rest) * lb_size),
2411 rest * lb_size);
2412 if (!res)
2413 return res;
2414 arr += num * lb_size;
2415 memcpy(fake_storep + (block * lb_size), arr, (num - rest) * lb_size);
2416 if (rest)
2417 memcpy(fake_storep, arr + ((num - rest) * lb_size),
2418 rest * lb_size);
2419 return res;
2420}
2421
51d648af 2422static __be16 dif_compute_csum(const void *buf, int len)
beb40ea4 2423{
51d648af 2424 __be16 csum;
beb40ea4 2425
773642d9 2426 if (sdebug_guard)
51d648af
AM		 2427 csum = (__force __be16)ip_compute_csum(buf, len);
2428 else
beb40ea4 2429 csum = cpu_to_be16(crc_t10dif(buf, len));
51d648af 2430
beb40ea4
AM		 2431 return csum;
2432}
2433
6ebf105c 2434static int dif_verify(struct t10_pi_tuple *sdt, const void *data,
beb40ea4
AM		 2435 sector_t sector, u32 ei_lba)
2436{
773642d9 2437 __be16 csum = dif_compute_csum(data, sdebug_sector_size);
beb40ea4
AM		 2438
2439 if (sdt->guard_tag != csum) {
c1287970 2440 pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
beb40ea4
AM		 2441 (unsigned long)sector,
2442 be16_to_cpu(sdt->guard_tag),
2443 be16_to_cpu(csum));
2444 return 0x01;
2445 }
8475c811 2446 if (sdebug_dif == T10_PI_TYPE1_PROTECTION &&
beb40ea4 2447 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
c1287970
TW		 2448 pr_err("REF check failed on sector %lu\n",
2449 (unsigned long)sector);
beb40ea4
AM		 2450 return 0x03;
2451 }
8475c811 2452 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
beb40ea4 2453 be32_to_cpu(sdt->ref_tag) != ei_lba) {
c1287970
TW		 2454 pr_err("REF check failed on sector %lu\n",
2455 (unsigned long)sector);
beb40ea4
AM		 2456 return 0x03;
2457 }
2458 return 0;
2459}
2460
bb8c063c 2461static void dif_copy_prot(struct scsi_cmnd *SCpnt, sector_t sector,
65f72f2a 2462 unsigned int sectors, bool read)
c6a44287 2463{
be4e11be 2464 size_t resid;
c6a44287 2465 void *paddr;
14faa944 2466 const void *dif_store_end = dif_storep + sdebug_store_sectors;
be4e11be 2467 struct sg_mapping_iter miter;
c6a44287 2468
e18d8bea
AM		 2469 /* Bytes of protection data to copy into sgl */
2470 resid = sectors * sizeof(*dif_storep);
c6a44287 2471
be4e11be
AM		 2472 sg_miter_start(&miter, scsi_prot_sglist(SCpnt),
2473 scsi_prot_sg_count(SCpnt), SG_MITER_ATOMIC |
2474 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
2475
2476 while (sg_miter_next(&miter) && resid > 0) {
2477 size_t len = min(miter.length, resid);
14faa944 2478 void *start = dif_store(sector);
be4e11be 2479 size_t rest = 0;
14faa944
AM		 2480
2481 if (dif_store_end < start + len)
2482 rest = start + len - dif_store_end;
c6a44287 2483
be4e11be 2484 paddr = miter.addr;
14faa944 2485
65f72f2a
AM		 2486 if (read)
2487 memcpy(paddr, start, len - rest);
2488 else
2489 memcpy(start, paddr, len - rest);
2490
2491 if (rest) {
2492 if (read)
2493 memcpy(paddr + len - rest, dif_storep, rest);
2494 else
2495 memcpy(dif_storep, paddr + len - rest, rest);
2496 }
c6a44287 2497
e18d8bea 2498 sector += len / sizeof(*dif_storep);
c6a44287 2499 resid -= len;
c6a44287 2500 }
be4e11be 2501 sg_miter_stop(&miter);
bb8c063c
AM		 2502}
2503
2504static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
2505 unsigned int sectors, u32 ei_lba)
2506{
2507 unsigned int i;
6ebf105c 2508 struct t10_pi_tuple *sdt;
bb8c063c
AM		 2509 sector_t sector;
2510
c45eabec 2511 for (i = 0; i < sectors; i++, ei_lba++) {
bb8c063c
AM		 2512 int ret;
2513
2514 sector = start_sec + i;
2515 sdt = dif_store(sector);
2516
51d648af 2517 if (sdt->app_tag == cpu_to_be16(0xffff))
bb8c063c
AM		 2518 continue;
2519
2520 ret = dif_verify(sdt, fake_store(sector), sector, ei_lba);
2521 if (ret) {
2522 dif_errors++;
2523 return ret;
2524 }
bb8c063c 2525 }
c6a44287 2526
65f72f2a 2527 dif_copy_prot(SCpnt, start_sec, sectors, true);
c6a44287
MP		 2528 dix_reads++;
2529
2530 return 0;
2531}
2532
fd32119b 2533static int resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
19789100 2534{
c2248fc9 2535 u8 *cmd = scp->cmnd;
c4837394 2536 struct sdebug_queued_cmd *sqcp;
c2248fc9
DG		 2537 u64 lba;
2538 u32 num;
2539 u32 ei_lba;
19789100
FT		 2540 unsigned long iflags;
2541 int ret;
c2248fc9 2542 bool check_prot;
19789100 2543
c2248fc9
DG		 2544 switch (cmd[0]) {
2545 case READ_16:
2546 ei_lba = 0;
2547 lba = get_unaligned_be64(cmd + 2);
2548 num = get_unaligned_be32(cmd + 10);
2549 check_prot = true;
2550 break;
2551 case READ_10:
2552 ei_lba = 0;
2553 lba = get_unaligned_be32(cmd + 2);
2554 num = get_unaligned_be16(cmd + 7);
2555 check_prot = true;
2556 break;
2557 case READ_6:
2558 ei_lba = 0;
2559 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
2560 (u32)(cmd[1] & 0x1f) << 16;
2561 num = (0 == cmd[4]) ? 256 : cmd[4];
2562 check_prot = true;
2563 break;
2564 case READ_12:
2565 ei_lba = 0;
2566 lba = get_unaligned_be32(cmd + 2);
2567 num = get_unaligned_be32(cmd + 6);
2568 check_prot = true;
2569 break;
2570 case XDWRITEREAD_10:
2571 ei_lba = 0;
2572 lba = get_unaligned_be32(cmd + 2);
2573 num = get_unaligned_be16(cmd + 7);
2574 check_prot = false;
2575 break;
2576 default: /* assume READ(32) */
2577 lba = get_unaligned_be64(cmd + 12);
2578 ei_lba = get_unaligned_be32(cmd + 20);
2579 num = get_unaligned_be32(cmd + 28);
2580 check_prot = false;
2581 break;
2582 }
f46eb0e9 2583 if (unlikely(have_dif_prot && check_prot)) {
8475c811 2584 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
c2248fc9
DG		 2585 (cmd[1] & 0xe0)) {
2586 mk_sense_invalid_opcode(scp);
2587 return check_condition_result;
2588 }
8475c811
CH		 2589 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
2590 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
c2248fc9
DG		 2591 (cmd[1] & 0xe0) == 0)
2592 sdev_printk(KERN_ERR, scp->device, "Unprotected RD "
2593 "to DIF device\n");
2594 }
f46eb0e9 2595 if (unlikely(sdebug_any_injecting_opt)) {
c4837394 2596 sqcp = (struct sdebug_queued_cmd *)scp->host_scribble;
c2248fc9 2597
c4837394
DG		 2598 if (sqcp) {
2599 if (sqcp->inj_short)
2600 num /= 2;
2601 }
2602 } else
2603 sqcp = NULL;
c2248fc9
DG		 2604
2605 /* inline check_device_access_params() */
f46eb0e9 2606 if (unlikely(lba + num > sdebug_capacity)) {
c2248fc9
DG		 2607 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2608 return check_condition_result;
2609 }
2610 /* transfer length excessive (tie in to block limits VPD page) */
f46eb0e9 2611 if (unlikely(num > sdebug_store_sectors)) {
c2248fc9
DG		 2612 /* needs work to find which cdb byte 'num' comes from */
2613 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2614 return check_condition_result;
2615 }
19789100 2616
f46eb0e9
DG		 2617 if (unlikely((SDEBUG_OPT_MEDIUM_ERR & sdebug_opts) &&
2618 (lba <= (OPT_MEDIUM_ERR_ADDR + OPT_MEDIUM_ERR_NUM - 1)) &&
2619 ((lba + num) > OPT_MEDIUM_ERR_ADDR))) {
c65b1445 2620 /* claim unrecoverable read error */
c2248fc9 2621 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
c65b1445 2622 /* set info field and valid bit for fixed descriptor */
c2248fc9
DG		 2623 if (0x70 == (scp->sense_buffer[0] & 0x7f)) {
2624 scp->sense_buffer[0] |= 0x80; /* Valid bit */
32f7ef73
DG		 2625 ret = (lba < OPT_MEDIUM_ERR_ADDR)
2626 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
c2248fc9 2627 put_unaligned_be32(ret, scp->sense_buffer + 3);
c65b1445 2628 }
c2248fc9 2629 scsi_set_resid(scp, scsi_bufflen(scp));
1da177e4
LT		 2630 return check_condition_result;
2631 }
c6a44287 2632
6c78cc06
AM		 2633 read_lock_irqsave(&atomic_rw, iflags);
2634
c6a44287 2635 /* DIX + T10 DIF */
f46eb0e9 2636 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
c2248fc9 2637 int prot_ret = prot_verify_read(scp, lba, num, ei_lba);
c6a44287
MP		 2638
2639 if (prot_ret) {
6c78cc06 2640 read_unlock_irqrestore(&atomic_rw, iflags);
c2248fc9 2641 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, prot_ret);
c6a44287
MP		 2642 return illegal_condition_result;
2643 }
2644 }
2645
c2248fc9 2646 ret = do_device_access(scp, lba, num, false);
1da177e4 2647 read_unlock_irqrestore(&atomic_rw, iflags);
f46eb0e9 2648 if (unlikely(ret == -1))
a4517511
AM		 2649 return DID_ERROR << 16;
2650
c2248fc9 2651 scsi_in(scp)->resid = scsi_bufflen(scp) - ret;
a4517511 2652
c4837394
DG		 2653 if (unlikely(sqcp)) {
2654 if (sqcp->inj_recovered) {
c2248fc9
DG		 2655 mk_sense_buffer(scp, RECOVERED_ERROR,
2656 THRESHOLD_EXCEEDED, 0);
2657 return check_condition_result;
c4837394 2658 } else if (sqcp->inj_transport) {
c2248fc9
DG		 2659 mk_sense_buffer(scp, ABORTED_COMMAND,
2660 TRANSPORT_PROBLEM, ACK_NAK_TO);
2661 return check_condition_result;
c4837394 2662 } else if (sqcp->inj_dif) {
c2248fc9
DG		 2663 /* Logical block guard check failed */
2664 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
2665 return illegal_condition_result;
c4837394 2666 } else if (sqcp->inj_dix) {
c2248fc9
DG		 2667 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
2668 return illegal_condition_result;
2669 }
2670 }
a4517511 2671 return 0;
1da177e4
LT		 2672}
2673
58a8635d 2674static void dump_sector(unsigned char *buf, int len)
c6a44287 2675{
cbf67842 2676 int i, j, n;
c6a44287 2677
cbf67842 2678 pr_err(">>> Sector Dump <<<\n");
c6a44287 2679 for (i = 0 ; i < len ; i += 16) {
cbf67842 2680 char b[128];
c6a44287 2681
cbf67842 2682 for (j = 0, n = 0; j < 16; j++) {
c6a44287 2683 unsigned char c = buf[i+j];
cbf67842 2684
c6a44287 2685 if (c >= 0x20 && c < 0x7e)
cbf67842
DG		 2686 n += scnprintf(b + n, sizeof(b) - n,
2687 " %c ", buf[i+j]);
c6a44287 2688 else
cbf67842
DG		 2689 n += scnprintf(b + n, sizeof(b) - n,
2690 "%02x ", buf[i+j]);
c6a44287 2691 }
cbf67842 2692 pr_err("%04d: %s\n", i, b);
c6a44287
MP		 2693 }
2694}
2695
2696static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
395cef03 2697 unsigned int sectors, u32 ei_lba)
c6a44287 2698{
be4e11be 2699 int ret;
6ebf105c 2700 struct t10_pi_tuple *sdt;
be4e11be 2701 void *daddr;
65f72f2a 2702 sector_t sector = start_sec;
c6a44287 2703 int ppage_offset;
be4e11be
AM		 2704 int dpage_offset;
2705 struct sg_mapping_iter diter;
2706 struct sg_mapping_iter piter;
c6a44287 2707
c6a44287
MP		 2708 BUG_ON(scsi_sg_count(SCpnt) == 0);
2709 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
2710
be4e11be
AM		 2711 sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
2712 scsi_prot_sg_count(SCpnt),
2713 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
2714 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
2715 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
2716
2717 /* For each protection page */
2718 while (sg_miter_next(&piter)) {
2719 dpage_offset = 0;
2720 if (WARN_ON(!sg_miter_next(&diter))) {
2721 ret = 0x01;
2722 goto out;
2723 }
c6a44287 2724
be4e11be 2725 for (ppage_offset = 0; ppage_offset < piter.length;
6ebf105c 2726 ppage_offset += sizeof(struct t10_pi_tuple)) {
c6a44287 2727 /* If we're at the end of the current
be4e11be 2728 * data page advance to the next one
c6a44287 2729 */
be4e11be
AM		 2730 if (dpage_offset >= diter.length) {
2731 if (WARN_ON(!sg_miter_next(&diter))) {
2732 ret = 0x01;
2733 goto out;
2734 }
2735 dpage_offset = 0;
c6a44287
MP		 2736 }
2737
be4e11be
AM		 2738 sdt = piter.addr + ppage_offset;
2739 daddr = diter.addr + dpage_offset;
c6a44287 2740
be4e11be 2741 ret = dif_verify(sdt, daddr, sector, ei_lba);
beb40ea4 2742 if (ret) {
773642d9 2743 dump_sector(daddr, sdebug_sector_size);
395cef03
MP		 2744 goto out;
2745 }
2746
c6a44287 2747 sector++;
395cef03 2748 ei_lba++;
773642d9 2749 dpage_offset += sdebug_sector_size;
c6a44287 2750 }
be4e11be
AM		 2751 diter.consumed = dpage_offset;
2752 sg_miter_stop(&diter);
c6a44287 2753 }
be4e11be 2754 sg_miter_stop(&piter);
c6a44287 2755
65f72f2a 2756 dif_copy_prot(SCpnt, start_sec, sectors, false);
c6a44287
MP		 2757 dix_writes++;
2758
2759 return 0;
2760
2761out:
2762 dif_errors++;
be4e11be
AM		 2763 sg_miter_stop(&diter);
2764 sg_miter_stop(&piter);
c6a44287
MP		 2765 return ret;
2766}
2767
b90ebc3d
AM		 2768static unsigned long lba_to_map_index(sector_t lba)
2769{
773642d9
DG		 2770 if (sdebug_unmap_alignment)
2771 lba += sdebug_unmap_granularity - sdebug_unmap_alignment;
2772 sector_div(lba, sdebug_unmap_granularity);
b90ebc3d
AM		 2773 return lba;
2774}
2775
2776static sector_t map_index_to_lba(unsigned long index)
44d92694 2777{
773642d9 2778 sector_t lba = index * sdebug_unmap_granularity;
a027b5b9 2779
773642d9
DG		 2780 if (sdebug_unmap_alignment)
2781 lba -= sdebug_unmap_granularity - sdebug_unmap_alignment;
a027b5b9 2782 return lba;
b90ebc3d 2783}
44d92694 2784
b90ebc3d
AM		 2785static unsigned int map_state(sector_t lba, unsigned int *num)
2786{
2787 sector_t end;
2788 unsigned int mapped;
2789 unsigned long index;
2790 unsigned long next;
44d92694 2791
b90ebc3d
AM		 2792 index = lba_to_map_index(lba);
2793 mapped = test_bit(index, map_storep);
44d92694
MP		 2794
2795 if (mapped)
b90ebc3d 2796 next = find_next_zero_bit(map_storep, map_size, index);
44d92694 2797 else
b90ebc3d 2798 next = find_next_bit(map_storep, map_size, index);
44d92694 2799
b90ebc3d 2800 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
44d92694 2801 *num = end - lba;
44d92694
MP		 2802 return mapped;
2803}
2804
2805static void map_region(sector_t lba, unsigned int len)
2806{
44d92694
MP		 2807 sector_t end = lba + len;
2808
44d92694 2809 while (lba < end) {
b90ebc3d 2810 unsigned long index = lba_to_map_index(lba);
44d92694 2811
b90ebc3d
AM		 2812 if (index < map_size)
2813 set_bit(index, map_storep);
44d92694 2814
b90ebc3d 2815 lba = map_index_to_lba(index + 1);
44d92694
MP		 2816 }
2817}
2818
2819static void unmap_region(sector_t lba, unsigned int len)
2820{
44d92694
MP		 2821 sector_t end = lba + len;
2822
44d92694 2823 while (lba < end) {
b90ebc3d 2824 unsigned long index = lba_to_map_index(lba);
44d92694 2825
b90ebc3d 2826 if (lba == map_index_to_lba(index) &&
773642d9 2827 lba + sdebug_unmap_granularity <= end &&
b90ebc3d
AM		 2828 index < map_size) {
2829 clear_bit(index, map_storep);
760f3b03 2830 if (sdebug_lbprz) { /* for LBPRZ=2 return 0xff_s */
be1dd78d 2831 memset(fake_storep +
760f3b03
DG		 2832 lba * sdebug_sector_size,
2833 (sdebug_lbprz & 1) ? 0 : 0xff,
773642d9
DG		 2834 sdebug_sector_size *
2835 sdebug_unmap_granularity);
b90ebc3d 2836 }
e9926b43
AM		 2837 if (dif_storep) {
2838 memset(dif_storep + lba, 0xff,
2839 sizeof(*dif_storep) *
773642d9 2840 sdebug_unmap_granularity);
e9926b43 2841 }
be1dd78d 2842 }
b90ebc3d 2843 lba = map_index_to_lba(index + 1);
44d92694
MP		 2844 }
2845}
2846
fd32119b 2847static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1da177e4 2848{
c2248fc9
DG		 2849 u8 *cmd = scp->cmnd;
2850 u64 lba;
2851 u32 num;
2852 u32 ei_lba;
1da177e4 2853 unsigned long iflags;
19789100 2854 int ret;
c2248fc9 2855 bool check_prot;
1da177e4 2856
c2248fc9
DG		 2857 switch (cmd[0]) {
2858 case WRITE_16:
2859 ei_lba = 0;
2860 lba = get_unaligned_be64(cmd + 2);
2861 num = get_unaligned_be32(cmd + 10);
2862 check_prot = true;
2863 break;
2864 case WRITE_10:
2865 ei_lba = 0;
2866 lba = get_unaligned_be32(cmd + 2);
2867 num = get_unaligned_be16(cmd + 7);
2868 check_prot = true;
2869 break;
2870 case WRITE_6:
2871 ei_lba = 0;
2872 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
2873 (u32)(cmd[1] & 0x1f) << 16;
2874 num = (0 == cmd[4]) ? 256 : cmd[4];
2875 check_prot = true;
2876 break;
2877 case WRITE_12:
2878 ei_lba = 0;
2879 lba = get_unaligned_be32(cmd + 2);
2880 num = get_unaligned_be32(cmd + 6);
2881 check_prot = true;
2882 break;
2883 case 0x53: /* XDWRITEREAD(10) */
2884 ei_lba = 0;
2885 lba = get_unaligned_be32(cmd + 2);
2886 num = get_unaligned_be16(cmd + 7);
2887 check_prot = false;
2888 break;
2889 default: /* assume WRITE(32) */
2890 lba = get_unaligned_be64(cmd + 12);
2891 ei_lba = get_unaligned_be32(cmd + 20);
2892 num = get_unaligned_be32(cmd + 28);
2893 check_prot = false;
2894 break;
2895 }
f46eb0e9 2896 if (unlikely(have_dif_prot && check_prot)) {
8475c811 2897 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
c2248fc9
DG		 2898 (cmd[1] & 0xe0)) {
2899 mk_sense_invalid_opcode(scp);
2900 return check_condition_result;
2901 }
8475c811
CH		 2902 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
2903 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
c2248fc9
DG		 2904 (cmd[1] & 0xe0) == 0)
2905 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
2906 "to DIF device\n");
2907 }
2908
2909 /* inline check_device_access_params() */
f46eb0e9 2910 if (unlikely(lba + num > sdebug_capacity)) {
c2248fc9
DG		 2911 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2912 return check_condition_result;
2913 }
2914 /* transfer length excessive (tie in to block limits VPD page) */
f46eb0e9 2915 if (unlikely(num > sdebug_store_sectors)) {
c2248fc9
DG		 2916 /* needs work to find which cdb byte 'num' comes from */
2917 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2918 return check_condition_result;
2919 }
1da177e4 2920
6c78cc06
AM		 2921 write_lock_irqsave(&atomic_rw, iflags);
2922
c6a44287 2923 /* DIX + T10 DIF */
f46eb0e9 2924 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
c2248fc9 2925 int prot_ret = prot_verify_write(scp, lba, num, ei_lba);
c6a44287
MP		 2926
2927 if (prot_ret) {
6c78cc06 2928 write_unlock_irqrestore(&atomic_rw, iflags);
c2248fc9 2929 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, prot_ret);
c6a44287
MP		 2930 return illegal_condition_result;
2931 }
2932 }
2933
c2248fc9 2934 ret = do_device_access(scp, lba, num, true);
f46eb0e9 2935 if (unlikely(scsi_debug_lbp()))
44d92694 2936 map_region(lba, num);
1da177e4 2937 write_unlock_irqrestore(&atomic_rw, iflags);
f46eb0e9 2938 if (unlikely(-1 == ret))
773642d9 2939 return DID_ERROR << 16;
c4837394
DG		 2940 else if (unlikely(sdebug_verbose &&
2941 (ret < (num * sdebug_sector_size))))
c2248fc9 2942 sdev_printk(KERN_INFO, scp->device,
cbf67842 2943 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
773642d9 2944 my_name, num * sdebug_sector_size, ret);
44d92694 2945
f46eb0e9 2946 if (unlikely(sdebug_any_injecting_opt)) {
c4837394
DG		 2947 struct sdebug_queued_cmd *sqcp =
2948 (struct sdebug_queued_cmd *)scp->host_scribble;
c2248fc9 2949
c4837394
DG		 2950 if (sqcp) {
2951 if (sqcp->inj_recovered) {
2952 mk_sense_buffer(scp, RECOVERED_ERROR,
2953 THRESHOLD_EXCEEDED, 0);
2954 return check_condition_result;
2955 } else if (sqcp->inj_dif) {
2956 /* Logical block guard check failed */
2957 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
2958 return illegal_condition_result;
2959 } else if (sqcp->inj_dix) {
2960 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
2961 return illegal_condition_result;
2962 }
c2248fc9
DG		 2963 }
2964 }
44d92694
MP		 2965 return 0;
2966}
2967
fd32119b
DG		 2968static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num,
2969 u32 ei_lba, bool unmap, bool ndob)
44d92694
MP		 2970{
2971 unsigned long iflags;
2972 unsigned long long i;
2973 int ret;
773642d9 2974 u64 lba_off;
44d92694 2975
c2248fc9 2976 ret = check_device_access_params(scp, lba, num);
44d92694
MP		 2977 if (ret)
2978 return ret;
2979
2980 write_lock_irqsave(&atomic_rw, iflags);
2981
9ed8d3dc 2982 if (unmap && scsi_debug_lbp()) {
44d92694
MP		 2983 unmap_region(lba, num);
2984 goto out;
2985 }
2986
773642d9 2987 lba_off = lba * sdebug_sector_size;
c2248fc9
DG		 2988 /* if ndob then zero 1 logical block, else fetch 1 logical block */
2989 if (ndob) {
773642d9 2990 memset(fake_storep + lba_off, 0, sdebug_sector_size);
c2248fc9
DG		 2991 ret = 0;
2992 } else
773642d9
DG		 2993 ret = fetch_to_dev_buffer(scp, fake_storep + lba_off,
2994 sdebug_sector_size);
44d92694
MP		 2995
2996 if (-1 == ret) {
2997 write_unlock_irqrestore(&atomic_rw, iflags);
773642d9
DG		 2998 return DID_ERROR << 16;
2999 } else if (sdebug_verbose && (ret < (num * sdebug_sector_size)))
c2248fc9 3000 sdev_printk(KERN_INFO, scp->device,
cbf67842
DG		 3001 "%s: %s: cdb indicated=%u, IO sent=%d bytes\n",
3002 my_name, "write same",
773642d9 3003 num * sdebug_sector_size, ret);
44d92694
MP		 3004
3005 /* Copy first sector to remaining blocks */
3006 for (i = 1 ; i < num ; i++)
773642d9
DG		 3007 memcpy(fake_storep + ((lba + i) * sdebug_sector_size),
3008 fake_storep + lba_off,
3009 sdebug_sector_size);
44d92694 3010
9ed8d3dc 3011 if (scsi_debug_lbp())
44d92694
MP		 3012 map_region(lba, num);
3013out:
3014 write_unlock_irqrestore(&atomic_rw, iflags);
3015
1da177e4
LT		 3016 return 0;
3017}
3018
fd32119b
DG		 3019static int resp_write_same_10(struct scsi_cmnd *scp,
3020 struct sdebug_dev_info *devip)
c2248fc9
DG		 3021{
3022 u8 *cmd = scp->cmnd;
3023 u32 lba;
3024 u16 num;
3025 u32 ei_lba = 0;
3026 bool unmap = false;
3027
3028 if (cmd[1] & 0x8) {
773642d9 3029 if (sdebug_lbpws10 == 0) {
c2248fc9
DG		 3030 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3031 return check_condition_result;
3032 } else
3033 unmap = true;
3034 }
3035 lba = get_unaligned_be32(cmd + 2);
3036 num = get_unaligned_be16(cmd + 7);
773642d9 3037 if (num > sdebug_write_same_length) {
c2248fc9
DG		 3038 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3039 return check_condition_result;
3040 }
3041 return resp_write_same(scp, lba, num, ei_lba, unmap, false);
3042}
3043
fd32119b
DG		 3044static int resp_write_same_16(struct scsi_cmnd *scp,
3045 struct sdebug_dev_info *devip)
c2248fc9
DG		 3046{
3047 u8 *cmd = scp->cmnd;
3048 u64 lba;
3049 u32 num;
3050 u32 ei_lba = 0;
3051 bool unmap = false;
3052 bool ndob = false;
3053
3054 if (cmd[1] & 0x8) { /* UNMAP */
773642d9 3055 if (sdebug_lbpws == 0) {
c2248fc9
DG		 3056 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3057 return check_condition_result;
3058 } else
3059 unmap = true;
3060 }
3061 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */
3062 ndob = true;
3063 lba = get_unaligned_be64(cmd + 2);
3064 num = get_unaligned_be32(cmd + 10);
773642d9 3065 if (num > sdebug_write_same_length) {
c2248fc9
DG		 3066 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
3067 return check_condition_result;
3068 }
3069 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob);
3070}
3071
acafd0b9
EM		 3072/* Note the mode field is in the same position as the (lower) service action
3073 * field. For the Report supported operation codes command, SPC-4 suggests
3074 * each mode of this command should be reported separately; for future. */
fd32119b
DG		 3075static int resp_write_buffer(struct scsi_cmnd *scp,
3076 struct sdebug_dev_info *devip)
acafd0b9
EM		 3077{
3078 u8 *cmd = scp->cmnd;
3079 struct scsi_device *sdp = scp->device;
3080 struct sdebug_dev_info *dp;
3081 u8 mode;
3082
3083 mode = cmd[1] & 0x1f;
3084 switch (mode) {
3085 case 0x4: /* download microcode (MC) and activate (ACT) */
3086 /* set UAs on this device only */
3087 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3088 set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm);
3089 break;
3090 case 0x5: /* download MC, save and ACT */
3091 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm);
3092 break;
3093 case 0x6: /* download MC with offsets and ACT */
3094 /* set UAs on most devices (LUs) in this target */
3095 list_for_each_entry(dp,
3096 &devip->sdbg_host->dev_info_list,
3097 dev_list)
3098 if (dp->target == sdp->id) {
3099 set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm);
3100 if (devip != dp)
3101 set_bit(SDEBUG_UA_MICROCODE_CHANGED,
3102 dp->uas_bm);
3103 }
3104 break;
3105 case 0x7: /* download MC with offsets, save, and ACT */
3106 /* set UA on all devices (LUs) in this target */
3107 list_for_each_entry(dp,
3108 &devip->sdbg_host->dev_info_list,
3109 dev_list)
3110 if (dp->target == sdp->id)
3111 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET,
3112 dp->uas_bm);
3113 break;
3114 default:
3115 /* do nothing for this command for other mode values */
3116 break;
3117 }
3118 return 0;
3119}
3120
fd32119b
DG		 3121static int resp_comp_write(struct scsi_cmnd *scp,
3122 struct sdebug_dev_info *devip)
38d5c833
DG		 3123{
3124 u8 *cmd = scp->cmnd;
3125 u8 *arr;
3126 u8 *fake_storep_hold;
3127 u64 lba;
3128 u32 dnum;
773642d9 3129 u32 lb_size = sdebug_sector_size;
38d5c833
DG		 3130 u8 num;
3131 unsigned long iflags;
3132 int ret;
d467d31f 3133 int retval = 0;
38d5c833 3134
d467d31f 3135 lba = get_unaligned_be64(cmd + 2);
38d5c833
DG		 3136 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */
3137 if (0 == num)
3138 return 0; /* degenerate case, not an error */
8475c811 3139 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
38d5c833
DG		 3140 (cmd[1] & 0xe0)) {
3141 mk_sense_invalid_opcode(scp);
3142 return check_condition_result;
3143 }
8475c811
CH		 3144 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3145 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
38d5c833
DG		 3146 (cmd[1] & 0xe0) == 0)
3147 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3148 "to DIF device\n");
3149
3150 /* inline check_device_access_params() */
3151 if (lba + num > sdebug_capacity) {
3152 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
3153 return check_condition_result;
3154 }
3155 /* transfer length excessive (tie in to block limits VPD page) */
3156 if (num > sdebug_store_sectors) {
3157 /* needs work to find which cdb byte 'num' comes from */
3158 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3159 return check_condition_result;
3160 }
d467d31f
DG		 3161 dnum = 2 * num;
3162 arr = kzalloc(dnum * lb_size, GFP_ATOMIC);
3163 if (NULL == arr) {
3164 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3165 INSUFF_RES_ASCQ);
3166 return check_condition_result;
3167 }
38d5c833
DG		 3168
3169 write_lock_irqsave(&atomic_rw, iflags);
3170
3171 /* trick do_device_access() to fetch both compare and write buffers
3172 * from data-in into arr. Safe (atomic) since write_lock held. */
3173 fake_storep_hold = fake_storep;
3174 fake_storep = arr;
3175 ret = do_device_access(scp, 0, dnum, true);
3176 fake_storep = fake_storep_hold;
3177 if (ret == -1) {
d467d31f
DG		 3178 retval = DID_ERROR << 16;
3179 goto cleanup;
773642d9 3180 } else if (sdebug_verbose && (ret < (dnum * lb_size)))
38d5c833
DG		 3181 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb "
3182 "indicated=%u, IO sent=%d bytes\n", my_name,
3183 dnum * lb_size, ret);
3184 if (!comp_write_worker(lba, num, arr)) {
38d5c833 3185 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
d467d31f
DG		 3186 retval = check_condition_result;
3187 goto cleanup;
38d5c833
DG		 3188 }
3189 if (scsi_debug_lbp())
3190 map_region(lba, num);
d467d31f 3191cleanup:
38d5c833 3192 write_unlock_irqrestore(&atomic_rw, iflags);
d467d31f
DG		 3193 kfree(arr);
3194 return retval;
38d5c833
DG		 3195}
3196
44d92694
MP		 3197struct unmap_block_desc {
3198 __be64 lba;
3199 __be32 blocks;
3200 __be32 __reserved;
3201};
3202
fd32119b 3203static int resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
44d92694
MP		 3204{
3205 unsigned char *buf;
3206 struct unmap_block_desc *desc;
3207 unsigned int i, payload_len, descriptors;
3208 int ret;
6c78cc06 3209 unsigned long iflags;
44d92694 3210
44d92694 3211
c2248fc9
DG		 3212 if (!scsi_debug_lbp())
3213 return 0; /* fib and say its done */
3214 payload_len = get_unaligned_be16(scp->cmnd + 7);
3215 BUG_ON(scsi_bufflen(scp) != payload_len);
44d92694
MP		 3216
3217 descriptors = (payload_len - 8) / 16;
773642d9 3218 if (descriptors > sdebug_unmap_max_desc) {
c2248fc9
DG		 3219 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3220 return check_condition_result;
3221 }
44d92694 3222
b333a819 3223 buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC);
c2248fc9
DG		 3224 if (!buf) {
3225 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3226 INSUFF_RES_ASCQ);
44d92694 3227 return check_condition_result;
c2248fc9 3228 }
44d92694 3229
c2248fc9 3230 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
44d92694
MP		 3231
3232 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
3233 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
3234
3235 desc = (void *)&buf[8];
3236
6c78cc06
AM		 3237 write_lock_irqsave(&atomic_rw, iflags);
3238
44d92694
MP		 3239 for (i = 0 ; i < descriptors ; i++) {
3240 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
3241 unsigned int num = get_unaligned_be32(&desc[i].blocks);
3242
c2248fc9 3243 ret = check_device_access_params(scp, lba, num);
44d92694
MP		 3244 if (ret)
3245 goto out;
3246
3247 unmap_region(lba, num);
3248 }
3249
3250 ret = 0;
3251
3252out:
6c78cc06 3253 write_unlock_irqrestore(&atomic_rw, iflags);
44d92694
MP		 3254 kfree(buf);
3255
3256 return ret;
3257}
3258
3259#define SDEBUG_GET_LBA_STATUS_LEN 32
3260
fd32119b
DG		 3261static int resp_get_lba_status(struct scsi_cmnd *scp,
3262 struct sdebug_dev_info *devip)
44d92694 3263{
c2248fc9
DG		 3264 u8 *cmd = scp->cmnd;
3265 u64 lba;
3266 u32 alloc_len, mapped, num;
3267 u8 arr[SDEBUG_GET_LBA_STATUS_LEN];
44d92694
MP		 3268 int ret;
3269
c2248fc9
DG		 3270 lba = get_unaligned_be64(cmd + 2);
3271 alloc_len = get_unaligned_be32(cmd + 10);
44d92694
MP		 3272
3273 if (alloc_len < 24)
3274 return 0;
3275
c2248fc9 3276 ret = check_device_access_params(scp, lba, 1);
44d92694
MP		 3277 if (ret)
3278 return ret;
3279
c2248fc9
DG		 3280 if (scsi_debug_lbp())
3281 mapped = map_state(lba, &num);
3282 else {
3283 mapped = 1;
3284 /* following just in case virtual_gb changed */
3285 sdebug_capacity = get_sdebug_capacity();
3286 if (sdebug_capacity - lba <= 0xffffffff)
3287 num = sdebug_capacity - lba;
3288 else
3289 num = 0xffffffff;
3290 }
44d92694
MP		 3291
3292 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
c2248fc9
DG		 3293 put_unaligned_be32(20, arr); /* Parameter Data Length */
3294 put_unaligned_be64(lba, arr + 8); /* LBA */
3295 put_unaligned_be32(num, arr + 16); /* Number of blocks */
3296 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */
44d92694 3297
c2248fc9 3298 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN);
44d92694
MP		 3299}
3300
fb0cc8d1
DG		 3301#define RL_BUCKET_ELEMS 8
3302
8d039e22
DG		 3303/* Even though each pseudo target has a REPORT LUNS "well known logical unit"
3304 * (W-LUN), the normal Linux scanning logic does not associate it with a
3305 * device (e.g. /dev/sg7). The following magic will make that association:
3306 * "cd /sys/class/scsi_host/host<n> ; echo '- - 49409' > scan"
3307 * where <n> is a host number. If there are multiple targets in a host then
3308 * the above will associate a W-LUN to each target. To only get a W-LUN
3309 * for target 2, then use "echo '- 2 49409' > scan" .
3310 */
3311static int resp_report_luns(struct scsi_cmnd *scp,
3312 struct sdebug_dev_info *devip)
1da177e4 3313{
8d039e22 3314 unsigned char *cmd = scp->cmnd;
1da177e4 3315 unsigned int alloc_len;
8d039e22 3316 unsigned char select_report;
22017ed2 3317 u64 lun;
8d039e22 3318 struct scsi_lun *lun_p;
fb0cc8d1 3319 u8 arr[RL_BUCKET_ELEMS * sizeof(struct scsi_lun)];
8d039e22
DG		 3320 unsigned int lun_cnt; /* normal LUN count (max: 256) */
3321 unsigned int wlun_cnt; /* report luns W-LUN count */
3322 unsigned int tlun_cnt; /* total LUN count */
3323 unsigned int rlen; /* response length (in bytes) */
fb0cc8d1
DG		 3324 int k, j, n, res;
3325 unsigned int off_rsp = 0;
3326 const int sz_lun = sizeof(struct scsi_lun);
1da177e4 3327
19c8ead7 3328 clear_luns_changed_on_target(devip);
8d039e22
DG		 3329
3330 select_report = cmd[2];
3331 alloc_len = get_unaligned_be32(cmd + 6);
3332
3333 if (alloc_len < 4) {
3334 pr_err("alloc len too small %d\n", alloc_len);
3335 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1da177e4
LT		 3336 return check_condition_result;
3337 }
8d039e22
DG		 3338
3339 switch (select_report) {
3340 case 0: /* all LUNs apart from W-LUNs */
3341 lun_cnt = sdebug_max_luns;
3342 wlun_cnt = 0;
3343 break;
3344 case 1: /* only W-LUNs */
c65b1445 3345 lun_cnt = 0;
8d039e22
DG		 3346 wlun_cnt = 1;
3347 break;
3348 case 2: /* all LUNs */
3349 lun_cnt = sdebug_max_luns;
3350 wlun_cnt = 1;
3351 break;
3352 case 0x10: /* only administrative LUs */
3353 case 0x11: /* see SPC-5 */
3354 case 0x12: /* only subsiduary LUs owned by referenced LU */
3355 default:
3356 pr_debug("select report invalid %d\n", select_report);
3357 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
3358 return check_condition_result;
3359 }
3360
3361 if (sdebug_no_lun_0 && (lun_cnt > 0))
c65b1445 3362 --lun_cnt;
8d039e22
DG		 3363
3364 tlun_cnt = lun_cnt + wlun_cnt;
fb0cc8d1
DG		 3365 rlen = tlun_cnt * sz_lun; /* excluding 8 byte header */
3366 scsi_set_resid(scp, scsi_bufflen(scp));
8d039e22
DG		 3367 pr_debug("select_report %d luns = %d wluns = %d no_lun0 %d\n",
3368 select_report, lun_cnt, wlun_cnt, sdebug_no_lun_0);
3369
fb0cc8d1 3370 /* loops rely on sizeof response header same as sizeof lun (both 8) */
8d039e22 3371 lun = sdebug_no_lun_0 ? 1 : 0;
fb0cc8d1
DG		 3372 for (k = 0, j = 0, res = 0; true; ++k, j = 0) {
3373 memset(arr, 0, sizeof(arr));
3374 lun_p = (struct scsi_lun *)&arr[0];
3375 if (k == 0) {
3376 put_unaligned_be32(rlen, &arr[0]);
3377 ++lun_p;
3378 j = 1;
3379 }
3380 for ( ; j < RL_BUCKET_ELEMS; ++j, ++lun_p) {
3381 if ((k * RL_BUCKET_ELEMS) + j > lun_cnt)
3382 break;
3383 int_to_scsilun(lun++, lun_p);
3384 }
3385 if (j < RL_BUCKET_ELEMS)
3386 break;
3387 n = j * sz_lun;
3388 res = p_fill_from_dev_buffer(scp, arr, n, off_rsp);
3389 if (res)
3390 return res;
3391 off_rsp += n;
3392 }
3393 if (wlun_cnt) {
3394 int_to_scsilun(SCSI_W_LUN_REPORT_LUNS, lun_p);
3395 ++j;
3396 }
3397 if (j > 0)
3398 res = p_fill_from_dev_buffer(scp, arr, j * sz_lun, off_rsp);
8d039e22 3399 return res;
1da177e4
LT		 3400}
3401
c639d14e
FT		 3402static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
3403 unsigned int num, struct sdebug_dev_info *devip)
3404{
be4e11be 3405 int j;
c639d14e
FT		 3406 unsigned char *kaddr, *buf;
3407 unsigned int offset;
c639d14e 3408 struct scsi_data_buffer *sdb = scsi_in(scp);
be4e11be 3409 struct sg_mapping_iter miter;
c639d14e
FT		 3410
3411 /* better not to use temporary buffer. */
b333a819 3412 buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC);
c5af0db9 3413 if (!buf) {
22017ed2
DG		 3414 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3415 INSUFF_RES_ASCQ);
c5af0db9
AM		 3416 return check_condition_result;
3417 }
c639d14e 3418
21a61829 3419 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
c639d14e
FT		 3420
3421 offset = 0;
be4e11be
AM		 3422 sg_miter_start(&miter, sdb->table.sgl, sdb->table.nents,
3423 SG_MITER_ATOMIC | SG_MITER_TO_SG);
c639d14e 3424
be4e11be
AM		 3425 while (sg_miter_next(&miter)) {
3426 kaddr = miter.addr;
3427 for (j = 0; j < miter.length; j++)
3428 *(kaddr + j) ^= *(buf + offset + j);
c639d14e 3429
be4e11be 3430 offset += miter.length;
c639d14e 3431 }
be4e11be 3432 sg_miter_stop(&miter);
c639d14e
FT		 3433 kfree(buf);
3434
be4e11be 3435 return 0;
c639d14e
FT		 3436}
3437
fd32119b
DG		 3438static int resp_xdwriteread_10(struct scsi_cmnd *scp,
3439 struct sdebug_dev_info *devip)
c2248fc9
DG		 3440{
3441 u8 *cmd = scp->cmnd;
3442 u64 lba;
3443 u32 num;
3444 int errsts;
3445
3446 if (!scsi_bidi_cmnd(scp)) {
3447 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3448 INSUFF_RES_ASCQ);
3449 return check_condition_result;
3450 }
3451 errsts = resp_read_dt0(scp, devip);
3452 if (errsts)
3453 return errsts;
3454 if (!(cmd[1] & 0x4)) { /* DISABLE_WRITE is not set */
3455 errsts = resp_write_dt0(scp, devip);
3456 if (errsts)
3457 return errsts;
3458 }
3459 lba = get_unaligned_be32(cmd + 2);
3460 num = get_unaligned_be16(cmd + 7);
3461 return resp_xdwriteread(scp, lba, num, devip);
3462}
3463
c4837394
DG		 3464static struct sdebug_queue *get_queue(struct scsi_cmnd *cmnd)
3465{
3466 struct sdebug_queue *sqp = sdebug_q_arr;
3467
3468 if (sdebug_mq_active) {
3469 u32 tag = blk_mq_unique_tag(cmnd->request);
3470 u16 hwq = blk_mq_unique_tag_to_hwq(tag);
3471
3472 if (unlikely(hwq >= submit_queues)) {
3473 pr_warn("Unexpected hwq=%d, apply modulo\n", hwq);
3474 hwq %= submit_queues;
3475 }
3476 pr_debug("tag=%u, hwq=%d\n", tag, hwq);
3477 return sqp + hwq;
3478 } else
3479 return sqp;
3480}
3481
3482/* Queued (deferred) command completions converge here. */
fd32119b 3483static void sdebug_q_cmd_complete(struct sdebug_defer *sd_dp)
1da177e4 3484{
c4837394 3485 int qc_idx;
cbf67842 3486 int retiring = 0;
1da177e4 3487 unsigned long iflags;
c4837394 3488 struct sdebug_queue *sqp;
cbf67842
DG		 3489 struct sdebug_queued_cmd *sqcp;
3490 struct scsi_cmnd *scp;
3491 struct sdebug_dev_info *devip;
1da177e4 3492
c4837394
DG		 3493 qc_idx = sd_dp->qc_idx;
3494 sqp = sdebug_q_arr + sd_dp->sqa_idx;
3495 if (sdebug_statistics) {
3496 atomic_inc(&sdebug_completions);
3497 if (raw_smp_processor_id() != sd_dp->issuing_cpu)
3498 atomic_inc(&sdebug_miss_cpus);
3499 }
3500 if (unlikely((qc_idx < 0) || (qc_idx >= SDEBUG_CANQUEUE))) {
3501 pr_err("wild qc_idx=%d\n", qc_idx);
1da177e4
LT		 3502 return;
3503 }
c4837394
DG		 3504 spin_lock_irqsave(&sqp->qc_lock, iflags);
3505 sqcp = &sqp->qc_arr[qc_idx];
cbf67842 3506 scp = sqcp->a_cmnd;
b01f6f83 3507 if (unlikely(scp == NULL)) {
c4837394
DG		 3508 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3509 pr_err("scp is NULL, sqa_idx=%d, qc_idx=%d\n",
3510 sd_dp->sqa_idx, qc_idx);
cbf67842
DG		 3511 return;
3512 }
3513 devip = (struct sdebug_dev_info *)scp->device->hostdata;
f46eb0e9 3514 if (likely(devip))
cbf67842
DG		 3515 atomic_dec(&devip->num_in_q);
3516 else
c1287970 3517 pr_err("devip=NULL\n");
f46eb0e9 3518 if (unlikely(atomic_read(&retired_max_queue) > 0))
cbf67842
DG		 3519 retiring = 1;
3520
3521 sqcp->a_cmnd = NULL;
c4837394
DG		 3522 if (unlikely(!test_and_clear_bit(qc_idx, sqp->in_use_bm))) {
3523 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
c1287970 3524 pr_err("Unexpected completion\n");
1da177e4
LT		 3525 return;
3526 }
cbf67842
DG		 3527
3528 if (unlikely(retiring)) { /* user has reduced max_queue */
3529 int k, retval;
3530
3531 retval = atomic_read(&retired_max_queue);
c4837394
DG		 3532 if (qc_idx >= retval) {
3533 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
c1287970 3534 pr_err("index %d too large\n", retval);
cbf67842
DG		 3535 return;
3536 }
c4837394 3537 k = find_last_bit(sqp->in_use_bm, retval);
773642d9 3538 if ((k < sdebug_max_queue) || (k == retval))
cbf67842
DG		 3539 atomic_set(&retired_max_queue, 0);
3540 else
3541 atomic_set(&retired_max_queue, k + 1);
1da177e4 3542 }
c4837394 3543 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
cbf67842 3544 scp->scsi_done(scp); /* callback to mid level */
1da177e4
LT		 3545}
3546
cbf67842 3547/* When high resolution timer goes off this function is called. */
fd32119b 3548static enum hrtimer_restart sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
cbf67842 3549{
a10bc12a
DG		 3550 struct sdebug_defer *sd_dp = container_of(timer, struct sdebug_defer,
3551 hrt);
3552 sdebug_q_cmd_complete(sd_dp);
cbf67842
DG		 3553 return HRTIMER_NORESTART;
3554}
1da177e4 3555
a10bc12a 3556/* When work queue schedules work, it calls this function. */
fd32119b 3557static void sdebug_q_cmd_wq_complete(struct work_struct *work)
a10bc12a
DG		 3558{
3559 struct sdebug_defer *sd_dp = container_of(work, struct sdebug_defer,
3560 ew.work);
3561 sdebug_q_cmd_complete(sd_dp);
3562}
3563
09ba24c1
DG		 3564static bool got_shared_uuid;
3565static uuid_be shared_uuid;
3566
fd32119b
DG		 3567static struct sdebug_dev_info *sdebug_device_create(
3568 struct sdebug_host_info *sdbg_host, gfp_t flags)
5cb2fc06
FT		 3569{
3570 struct sdebug_dev_info *devip;
3571
3572 devip = kzalloc(sizeof(*devip), flags);
3573 if (devip) {
09ba24c1
DG		 3574 if (sdebug_uuid_ctl == 1)
3575 uuid_be_gen(&devip->lu_name);
3576 else if (sdebug_uuid_ctl == 2) {
3577 if (got_shared_uuid)
3578 devip->lu_name = shared_uuid;
3579 else {
3580 uuid_be_gen(&shared_uuid);
3581 got_shared_uuid = true;
3582 devip->lu_name = shared_uuid;
3583 }
3584 }
5cb2fc06
FT		 3585 devip->sdbg_host = sdbg_host;
3586 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
3587 }
3588 return devip;
3589}
3590
f46eb0e9 3591static struct sdebug_dev_info *find_build_dev_info(struct scsi_device *sdev)
1da177e4 3592{
f46eb0e9
DG		 3593 struct sdebug_host_info *sdbg_host;
3594 struct sdebug_dev_info *open_devip = NULL;
3595 struct sdebug_dev_info *devip;
1da177e4 3596
d1e4c9c5
FT		 3597 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
3598 if (!sdbg_host) {
c1287970 3599 pr_err("Host info NULL\n");
1da177e4
LT		 3600 return NULL;
3601 }
3602 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
3603 if ((devip->used) && (devip->channel == sdev->channel) &&
3604 (devip->target == sdev->id) &&
3605 (devip->lun == sdev->lun))
3606 return devip;
3607 else {
3608 if ((!devip->used) && (!open_devip))
3609 open_devip = devip;
3610 }
3611 }
5cb2fc06
FT		 3612 if (!open_devip) { /* try and make a new one */
3613 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
3614 if (!open_devip) {
c1287970 3615 pr_err("out of memory at line %d\n", __LINE__);
1da177e4
LT		 3616 return NULL;
3617 }
1da177e4 3618 }
a75869d1
FT		 3619
3620 open_devip->channel = sdev->channel;
3621 open_devip->target = sdev->id;
3622 open_devip->lun = sdev->lun;
3623 open_devip->sdbg_host = sdbg_host;
cbf67842
DG		 3624 atomic_set(&open_devip->num_in_q, 0);
3625 set_bit(SDEBUG_UA_POR, open_devip->uas_bm);
c2248fc9 3626 open_devip->used = true;
a75869d1 3627 return open_devip;
1da177e4
LT		 3628}
3629
8dea0d02 3630static int scsi_debug_slave_alloc(struct scsi_device *sdp)
1da177e4 3631{
773642d9 3632 if (sdebug_verbose)
c1287970 3633 pr_info("slave_alloc <%u %u %u %llu>\n",
8dea0d02 3634 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
75ad23bc 3635 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue);
8dea0d02
FT		 3636 return 0;
3637}
1da177e4 3638
8dea0d02
FT		 3639static int scsi_debug_slave_configure(struct scsi_device *sdp)
3640{
f46eb0e9
DG		 3641 struct sdebug_dev_info *devip =
3642 (struct sdebug_dev_info *)sdp->hostdata;
a34c4e98 3643
773642d9 3644 if (sdebug_verbose)
c1287970 3645 pr_info("slave_configure <%u %u %u %llu>\n",
8dea0d02 3646 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
b01f6f83
DG		 3647 if (sdp->host->max_cmd_len != SDEBUG_MAX_CMD_LEN)
3648 sdp->host->max_cmd_len = SDEBUG_MAX_CMD_LEN;
3649 if (devip == NULL) {
f46eb0e9 3650 devip = find_build_dev_info(sdp);
b01f6f83 3651 if (devip == NULL)
f46eb0e9
DG		 3652 return 1; /* no resources, will be marked offline */
3653 }
c8b09f6f 3654 sdp->hostdata = devip;
6bb5e6e7 3655 blk_queue_max_segment_size(sdp->request_queue, -1U);
773642d9 3656 if (sdebug_no_uld)
78d4e5a0 3657 sdp->no_uld_attach = 1;
8dea0d02
FT		 3658 return 0;
3659}
3660
3661static void scsi_debug_slave_destroy(struct scsi_device *sdp)
3662{
3663 struct sdebug_dev_info *devip =
3664 (struct sdebug_dev_info *)sdp->hostdata;
a34c4e98 3665
773642d9 3666 if (sdebug_verbose)
c1287970 3667 pr_info("slave_destroy <%u %u %u %llu>\n",
8dea0d02
FT		 3668 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3669 if (devip) {
25985edc 3670 /* make this slot available for re-use */
c2248fc9 3671 devip->used = false;
8dea0d02
FT		 3672 sdp->hostdata = NULL;
3673 }
3674}
3675
c4837394
DG		 3676static void stop_qc_helper(struct sdebug_defer *sd_dp)
3677{
3678 if (!sd_dp)
3679 return;
3680 if ((sdebug_jdelay > 0) || (sdebug_ndelay > 0))
3681 hrtimer_cancel(&sd_dp->hrt);
3682 else if (sdebug_jdelay < 0)
3683 cancel_work_sync(&sd_dp->ew.work);
3684}
3685
a10bc12a
DG		 3686/* If @cmnd found deletes its timer or work queue and returns true; else
3687 returns false */
3688static bool stop_queued_cmnd(struct scsi_cmnd *cmnd)
8dea0d02
FT		 3689{
3690 unsigned long iflags;
c4837394
DG		 3691 int j, k, qmax, r_qmax;
3692 struct sdebug_queue *sqp;
8dea0d02 3693 struct sdebug_queued_cmd *sqcp;
cbf67842 3694 struct sdebug_dev_info *devip;
a10bc12a 3695 struct sdebug_defer *sd_dp;
8dea0d02 3696
c4837394
DG		 3697 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
3698 spin_lock_irqsave(&sqp->qc_lock, iflags);
3699 qmax = sdebug_max_queue;
3700 r_qmax = atomic_read(&retired_max_queue);
3701 if (r_qmax > qmax)
3702 qmax = r_qmax;
3703 for (k = 0; k < qmax; ++k) {
3704 if (test_bit(k, sqp->in_use_bm)) {
3705 sqcp = &sqp->qc_arr[k];
3706 if (cmnd != sqcp->a_cmnd)
3707 continue;
3708 /* found */
3709 devip = (struct sdebug_dev_info *)
3710 cmnd->device->hostdata;
3711 if (devip)
3712 atomic_dec(&devip->num_in_q);
3713 sqcp->a_cmnd = NULL;
3714 sd_dp = sqcp->sd_dp;
3715 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3716 stop_qc_helper(sd_dp);
3717 clear_bit(k, sqp->in_use_bm);
3718 return true;
cbf67842 3719 }
8dea0d02 3720 }
c4837394 3721 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
8dea0d02 3722 }
a10bc12a 3723 return false;
8dea0d02
FT		 3724}
3725
a10bc12a 3726/* Deletes (stops) timers or work queues of all queued commands */
8dea0d02
FT		 3727static void stop_all_queued(void)
3728{
3729 unsigned long iflags;
c4837394
DG		 3730 int j, k;
3731 struct sdebug_queue *sqp;
8dea0d02 3732 struct sdebug_queued_cmd *sqcp;
cbf67842 3733 struct sdebug_dev_info *devip;
a10bc12a 3734 struct sdebug_defer *sd_dp;
8dea0d02 3735
c4837394
DG		 3736 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
3737 spin_lock_irqsave(&sqp->qc_lock, iflags);
3738 for (k = 0; k < SDEBUG_CANQUEUE; ++k) {
3739 if (test_bit(k, sqp->in_use_bm)) {
3740 sqcp = &sqp->qc_arr[k];
3741 if (sqcp->a_cmnd == NULL)
3742 continue;
3743 devip = (struct sdebug_dev_info *)
3744 sqcp->a_cmnd->device->hostdata;
3745 if (devip)
3746 atomic_dec(&devip->num_in_q);
3747 sqcp->a_cmnd = NULL;
3748 sd_dp = sqcp->sd_dp;
3749 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3750 stop_qc_helper(sd_dp);
3751 clear_bit(k, sqp->in_use_bm);
3752 spin_lock_irqsave(&sqp->qc_lock, iflags);
cbf67842 3753 }
8dea0d02 3754 }
c4837394 3755 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
8dea0d02 3756 }
1da177e4
LT		 3757}
3758
cbf67842
DG		 3759/* Free queued command memory on heap */
3760static void free_all_queued(void)
1da177e4 3761{
c4837394
DG		 3762 int j, k;
3763 struct sdebug_queue *sqp;
cbf67842
DG		 3764 struct sdebug_queued_cmd *sqcp;
3765
c4837394
DG		 3766 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
3767 for (k = 0; k < SDEBUG_CANQUEUE; ++k) {
3768 sqcp = &sqp->qc_arr[k];
3769 kfree(sqcp->sd_dp);
3770 sqcp->sd_dp = NULL;
3771 }
cbf67842 3772 }
1da177e4
LT		 3773}
3774
cbf67842 3775static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
1da177e4 3776{
a10bc12a
DG		 3777 bool ok;
3778
cbf67842
DG		 3779 ++num_aborts;
3780 if (SCpnt) {
a10bc12a
DG		 3781 ok = stop_queued_cmnd(SCpnt);
3782 if (SCpnt->device && (SDEBUG_OPT_ALL_NOISE & sdebug_opts))
3783 sdev_printk(KERN_INFO, SCpnt->device,
3784 "%s: command%s found\n", __func__,
3785 ok ? "" : " not");
cbf67842
DG		 3786 }
3787 return SUCCESS;
1da177e4
LT		 3788}
3789
3790static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
3791{
1da177e4 3792 ++num_dev_resets;
cbf67842
DG		 3793 if (SCpnt && SCpnt->device) {
3794 struct scsi_device *sdp = SCpnt->device;
f46eb0e9
DG		 3795 struct sdebug_dev_info *devip =
3796 (struct sdebug_dev_info *)sdp->hostdata;
cbf67842 3797
773642d9 3798 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
cbf67842 3799 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
1da177e4 3800 if (devip)
cbf67842
DG		 3801 set_bit(SDEBUG_UA_POR, devip->uas_bm);
3802 }
3803 return SUCCESS;
3804}
3805
3806static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
3807{
3808 struct sdebug_host_info *sdbg_host;
3809 struct sdebug_dev_info *devip;
3810 struct scsi_device *sdp;
3811 struct Scsi_Host *hp;
3812 int k = 0;
3813
3814 ++num_target_resets;
3815 if (!SCpnt)
3816 goto lie;
3817 sdp = SCpnt->device;
3818 if (!sdp)
3819 goto lie;
773642d9 3820 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
cbf67842
DG		 3821 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3822 hp = sdp->host;
3823 if (!hp)
3824 goto lie;
3825 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
3826 if (sdbg_host) {
3827 list_for_each_entry(devip,
3828 &sdbg_host->dev_info_list,
3829 dev_list)
3830 if (devip->target == sdp->id) {
3831 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3832 ++k;
3833 }
1da177e4 3834 }
773642d9 3835 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
cbf67842
DG		 3836 sdev_printk(KERN_INFO, sdp,
3837 "%s: %d device(s) found in target\n", __func__, k);
3838lie:
1da177e4
LT		 3839 return SUCCESS;
3840}
3841
3842static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
3843{
3844 struct sdebug_host_info *sdbg_host;
cbf67842 3845 struct sdebug_dev_info *devip;
1da177e4
LT		 3846 struct scsi_device * sdp;
3847 struct Scsi_Host * hp;
cbf67842 3848 int k = 0;
1da177e4 3849
1da177e4 3850 ++num_bus_resets;
cbf67842
DG		 3851 if (!(SCpnt && SCpnt->device))
3852 goto lie;
3853 sdp = SCpnt->device;
773642d9 3854 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
cbf67842
DG		 3855 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3856 hp = sdp->host;
3857 if (hp) {
d1e4c9c5 3858 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
1da177e4 3859 if (sdbg_host) {
cbf67842 3860 list_for_each_entry(devip,
1da177e4 3861 &sdbg_host->dev_info_list,
cbf67842
DG		 3862 dev_list) {
3863 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3864 ++k;
3865 }
1da177e4
LT		 3866 }
3867 }
773642d9 3868 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
cbf67842
DG		 3869 sdev_printk(KERN_INFO, sdp,
3870 "%s: %d device(s) found in host\n", __func__, k);
3871lie:
1da177e4
LT		 3872 return SUCCESS;
3873}
3874
3875static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
3876{
3877 struct sdebug_host_info * sdbg_host;
cbf67842
DG		 3878 struct sdebug_dev_info *devip;
3879 int k = 0;
1da177e4 3880
1da177e4 3881 ++num_host_resets;
773642d9 3882 if ((SCpnt->device) && (SDEBUG_OPT_ALL_NOISE & sdebug_opts))
cbf67842 3883 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
1da177e4
LT		 3884 spin_lock(&sdebug_host_list_lock);
3885 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
cbf67842
DG		 3886 list_for_each_entry(devip, &sdbg_host->dev_info_list,
3887 dev_list) {
3888 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3889 ++k;
3890 }
1da177e4
LT		 3891 }
3892 spin_unlock(&sdebug_host_list_lock);
3893 stop_all_queued();
773642d9 3894 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
cbf67842
DG		 3895 sdev_printk(KERN_INFO, SCpnt->device,
3896 "%s: %d device(s) found\n", __func__, k);
1da177e4
LT		 3897 return SUCCESS;
3898}
3899
f58b0efb 3900static void __init sdebug_build_parts(unsigned char *ramp,
5f2578e5 3901 unsigned long store_size)
1da177e4
LT		 3902{
3903 struct partition * pp;
3904 int starts[SDEBUG_MAX_PARTS + 2];
3905 int sectors_per_part, num_sectors, k;
3906 int heads_by_sects, start_sec, end_sec;
3907
3908 /* assume partition table already zeroed */
773642d9 3909 if ((sdebug_num_parts < 1) || (store_size < 1048576))
1da177e4 3910 return;
773642d9
DG		 3911 if (sdebug_num_parts > SDEBUG_MAX_PARTS) {
3912 sdebug_num_parts = SDEBUG_MAX_PARTS;
c1287970 3913 pr_warn("reducing partitions to %d\n", SDEBUG_MAX_PARTS);
1da177e4 3914 }
c65b1445 3915 num_sectors = (int)sdebug_store_sectors;
1da177e4 3916 sectors_per_part = (num_sectors - sdebug_sectors_per)
773642d9 3917 / sdebug_num_parts;
1da177e4
LT		 3918 heads_by_sects = sdebug_heads * sdebug_sectors_per;
3919 starts[0] = sdebug_sectors_per;
773642d9 3920 for (k = 1; k < sdebug_num_parts; ++k)
1da177e4
LT		 3921 starts[k] = ((k * sectors_per_part) / heads_by_sects)
3922 * heads_by_sects;
773642d9
DG		 3923 starts[sdebug_num_parts] = num_sectors;
3924 starts[sdebug_num_parts + 1] = 0;
1da177e4
LT		 3925
3926 ramp[510] = 0x55; /* magic partition markings */
3927 ramp[511] = 0xAA;
3928 pp = (struct partition *)(ramp + 0x1be);
3929 for (k = 0; starts[k + 1]; ++k, ++pp) {
3930 start_sec = starts[k];
3931 end_sec = starts[k + 1] - 1;
3932 pp->boot_ind = 0;
3933
3934 pp->cyl = start_sec / heads_by_sects;
3935 pp->head = (start_sec - (pp->cyl * heads_by_sects))
3936 / sdebug_sectors_per;
3937 pp->sector = (start_sec % sdebug_sectors_per) + 1;
3938
3939 pp->end_cyl = end_sec / heads_by_sects;
3940 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
3941 / sdebug_sectors_per;
3942 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
3943
150c3544
AM		 3944 pp->start_sect = cpu_to_le32(start_sec);
3945 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
1da177e4
LT		 3946 pp->sys_ind = 0x83; /* plain Linux partition */
3947 }
3948}
3949
c4837394
DG		 3950static void block_unblock_all_queues(bool block)
3951{
3952 int j;
3953 struct sdebug_queue *sqp;
3954
3955 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp)
3956 atomic_set(&sqp->blocked, (int)block);
3957}
3958
3959/* Adjust (by rounding down) the sdebug_cmnd_count so abs(every_nth)-1
3960 * commands will be processed normally before triggers occur.
3961 */
3962static void tweak_cmnd_count(void)
3963{
3964 int count, modulo;
3965
3966 modulo = abs(sdebug_every_nth);
3967 if (modulo < 2)
3968 return;
3969 block_unblock_all_queues(true);
3970 count = atomic_read(&sdebug_cmnd_count);
3971 atomic_set(&sdebug_cmnd_count, (count / modulo) * modulo);
3972 block_unblock_all_queues(false);
3973}
3974
3975static void clear_queue_stats(void)
3976{
3977 atomic_set(&sdebug_cmnd_count, 0);
3978 atomic_set(&sdebug_completions, 0);
3979 atomic_set(&sdebug_miss_cpus, 0);
3980 atomic_set(&sdebug_a_tsf, 0);
3981}
3982
3983static void setup_inject(struct sdebug_queue *sqp,
3984 struct sdebug_queued_cmd *sqcp)
3985{
3986 if ((atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth)) > 0)
3987 return;
3988 sqcp->inj_recovered = !!(SDEBUG_OPT_RECOVERED_ERR & sdebug_opts);
3989 sqcp->inj_transport = !!(SDEBUG_OPT_TRANSPORT_ERR & sdebug_opts);
3990 sqcp->inj_dif = !!(SDEBUG_OPT_DIF_ERR & sdebug_opts);
3991 sqcp->inj_dix = !!(SDEBUG_OPT_DIX_ERR & sdebug_opts);
3992 sqcp->inj_short = !!(SDEBUG_OPT_SHORT_TRANSFER & sdebug_opts);
3993}
3994
3995/* Complete the processing of the thread that queued a SCSI command to this
3996 * driver. It either completes the command by calling cmnd_done() or
3997 * schedules a hr timer or work queue then returns 0. Returns
3998 * SCSI_MLQUEUE_HOST_BUSY if temporarily out of resources.
3999 */
fd32119b
DG		 4000static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
4001 int scsi_result, int delta_jiff)
1da177e4 4002{
cbf67842 4003 unsigned long iflags;
cd62b7da 4004 int k, num_in_q, qdepth, inject;
c4837394
DG		 4005 struct sdebug_queue *sqp;
4006 struct sdebug_queued_cmd *sqcp;
299b6c07 4007 struct scsi_device *sdp;
a10bc12a 4008 struct sdebug_defer *sd_dp;
299b6c07 4009
b01f6f83
DG		 4010 if (unlikely(devip == NULL)) {
4011 if (scsi_result == 0)
f46eb0e9
DG		 4012 scsi_result = DID_NO_CONNECT << 16;
4013 goto respond_in_thread;
cbf67842 4014 }
299b6c07
TW		 4015 sdp = cmnd->device;
4016
f46eb0e9 4017 if (unlikely(sdebug_verbose && scsi_result))
cbf67842
DG		 4018 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
4019 __func__, scsi_result);
cd62b7da
DG		 4020 if (delta_jiff == 0)
4021 goto respond_in_thread;
1da177e4 4022
cd62b7da 4023 /* schedule the response at a later time if resources permit */
c4837394
DG		 4024 sqp = get_queue(cmnd);
4025 spin_lock_irqsave(&sqp->qc_lock, iflags);
4026 if (unlikely(atomic_read(&sqp->blocked))) {
4027 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4028 return SCSI_MLQUEUE_HOST_BUSY;
4029 }
cbf67842
DG		 4030 num_in_q = atomic_read(&devip->num_in_q);
4031 qdepth = cmnd->device->queue_depth;
cbf67842 4032 inject = 0;
f46eb0e9 4033 if (unlikely((qdepth > 0) && (num_in_q >= qdepth))) {
cd62b7da 4034 if (scsi_result) {
c4837394 4035 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
cd62b7da
DG		 4036 goto respond_in_thread;
4037 } else
4038 scsi_result = device_qfull_result;
c4837394 4039 } else if (unlikely(sdebug_every_nth &&
f46eb0e9
DG		 4040 (SDEBUG_OPT_RARE_TSF & sdebug_opts) &&
4041 (scsi_result == 0))) {
cbf67842
DG		 4042 if ((num_in_q == (qdepth - 1)) &&
4043 (atomic_inc_return(&sdebug_a_tsf) >=
773642d9 4044 abs(sdebug_every_nth))) {
cbf67842
DG		 4045 atomic_set(&sdebug_a_tsf, 0);
4046 inject = 1;
cd62b7da 4047 scsi_result = device_qfull_result;
1da177e4
LT		 4048 }
4049 }
1da177e4 4050
c4837394 4051 k = find_first_zero_bit(sqp->in_use_bm, sdebug_max_queue);
f46eb0e9 4052 if (unlikely(k >= sdebug_max_queue)) {
c4837394 4053 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
cd62b7da
DG		 4054 if (scsi_result)
4055 goto respond_in_thread;
773642d9 4056 else if (SDEBUG_OPT_ALL_TSF & sdebug_opts)
cd62b7da 4057 scsi_result = device_qfull_result;
773642d9 4058 if (SDEBUG_OPT_Q_NOISE & sdebug_opts)
cbf67842 4059 sdev_printk(KERN_INFO, sdp,
cd62b7da 4060 "%s: max_queue=%d exceeded, %s\n",
773642d9 4061 __func__, sdebug_max_queue,
cd62b7da
DG		 4062 (scsi_result ? "status: TASK SET FULL" :
4063 "report: host busy"));
4064 if (scsi_result)
4065 goto respond_in_thread;
4066 else
cbf67842
DG		 4067 return SCSI_MLQUEUE_HOST_BUSY;
4068 }
c4837394 4069 __set_bit(k, sqp->in_use_bm);
cbf67842 4070 atomic_inc(&devip->num_in_q);
c4837394 4071 sqcp = &sqp->qc_arr[k];
cbf67842 4072 sqcp->a_cmnd = cmnd;
c4837394 4073 cmnd->host_scribble = (unsigned char *)sqcp;
cbf67842 4074 cmnd->result = scsi_result;
a10bc12a 4075 sd_dp = sqcp->sd_dp;
c4837394
DG		 4076 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4077 if (unlikely(sdebug_every_nth && sdebug_any_injecting_opt))
4078 setup_inject(sqp, sqcp);
b01f6f83 4079 if (delta_jiff > 0 || sdebug_ndelay > 0) {
b333a819 4080 ktime_t kt;
cbf67842 4081
b333a819
DG		 4082 if (delta_jiff > 0) {
4083 struct timespec ts;
4084
4085 jiffies_to_timespec(delta_jiff, &ts);
4086 kt = ktime_set(ts.tv_sec, ts.tv_nsec);
4087 } else
8b0e1953 4088 kt = sdebug_ndelay;
a10bc12a
DG		 4089 if (NULL == sd_dp) {
4090 sd_dp = kzalloc(sizeof(*sd_dp), GFP_ATOMIC);
4091 if (NULL == sd_dp)
cbf67842 4092 return SCSI_MLQUEUE_HOST_BUSY;
a10bc12a
DG		 4093 sqcp->sd_dp = sd_dp;
4094 hrtimer_init(&sd_dp->hrt, CLOCK_MONOTONIC,
c4837394 4095 HRTIMER_MODE_REL_PINNED);
a10bc12a 4096 sd_dp->hrt.function = sdebug_q_cmd_hrt_complete;
c4837394
DG		 4097 sd_dp->sqa_idx = sqp - sdebug_q_arr;
4098 sd_dp->qc_idx = k;
1da177e4 4099 }
c4837394
DG		 4100 if (sdebug_statistics)
4101 sd_dp->issuing_cpu = raw_smp_processor_id();
4102 hrtimer_start(&sd_dp->hrt, kt, HRTIMER_MODE_REL_PINNED);
4103 } else { /* jdelay < 0, use work queue */
a10bc12a
DG		 4104 if (NULL == sd_dp) {
4105 sd_dp = kzalloc(sizeof(*sqcp->sd_dp), GFP_ATOMIC);
4106 if (NULL == sd_dp)
cbf67842 4107 return SCSI_MLQUEUE_HOST_BUSY;
a10bc12a 4108 sqcp->sd_dp = sd_dp;
c4837394
DG		 4109 sd_dp->sqa_idx = sqp - sdebug_q_arr;
4110 sd_dp->qc_idx = k;
a10bc12a 4111 INIT_WORK(&sd_dp->ew.work, sdebug_q_cmd_wq_complete);
cbf67842 4112 }
c4837394
DG		 4113 if (sdebug_statistics)
4114 sd_dp->issuing_cpu = raw_smp_processor_id();
a10bc12a 4115 schedule_work(&sd_dp->ew.work);
1da177e4 4116 }
f46eb0e9
DG		 4117 if (unlikely((SDEBUG_OPT_Q_NOISE & sdebug_opts) &&
4118 (scsi_result == device_qfull_result)))
cbf67842
DG		 4119 sdev_printk(KERN_INFO, sdp,
4120 "%s: num_in_q=%d +1, %s%s\n", __func__,
4121 num_in_q, (inject ? "<inject> " : ""),
4122 "status: TASK SET FULL");
4123 return 0;
cd62b7da
DG		 4124
4125respond_in_thread: /* call back to mid-layer using invocation thread */
4126 cmnd->result = scsi_result;
4127 cmnd->scsi_done(cmnd);
4128 return 0;
1da177e4 4129}
cbf67842 4130
23183910
DG		 4131/* Note: The following macros create attribute files in the
4132 /sys/module/scsi_debug/parameters directory. Unfortunately this
4133 driver is unaware of a change and cannot trigger auxiliary actions
4134 as it can when the corresponding attribute in the
4135 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
4136 */
773642d9
DG		 4137module_param_named(add_host, sdebug_add_host, int, S_IRUGO | S_IWUSR);
4138module_param_named(ato, sdebug_ato, int, S_IRUGO);
4139module_param_named(clustering, sdebug_clustering, bool, S_IRUGO | S_IWUSR);
c2206098 4140module_param_named(delay, sdebug_jdelay, int, S_IRUGO | S_IWUSR);
773642d9
DG		 4141module_param_named(dev_size_mb, sdebug_dev_size_mb, int, S_IRUGO);
4142module_param_named(dif, sdebug_dif, int, S_IRUGO);
4143module_param_named(dix, sdebug_dix, int, S_IRUGO);
4144module_param_named(dsense, sdebug_dsense, int, S_IRUGO | S_IWUSR);
4145module_param_named(every_nth, sdebug_every_nth, int, S_IRUGO | S_IWUSR);
4146module_param_named(fake_rw, sdebug_fake_rw, int, S_IRUGO | S_IWUSR);
4147module_param_named(guard, sdebug_guard, uint, S_IRUGO);
4148module_param_named(host_lock, sdebug_host_lock, bool, S_IRUGO | S_IWUSR);
4149module_param_named(lbpu, sdebug_lbpu, int, S_IRUGO);
4150module_param_named(lbpws, sdebug_lbpws, int, S_IRUGO);
4151module_param_named(lbpws10, sdebug_lbpws10, int, S_IRUGO);
4152module_param_named(lbprz, sdebug_lbprz, int, S_IRUGO);
4153module_param_named(lowest_aligned, sdebug_lowest_aligned, int, S_IRUGO);
4154module_param_named(max_luns, sdebug_max_luns, int, S_IRUGO | S_IWUSR);
4155module_param_named(max_queue, sdebug_max_queue, int, S_IRUGO | S_IWUSR);
4156module_param_named(ndelay, sdebug_ndelay, int, S_IRUGO | S_IWUSR);
4157module_param_named(no_lun_0, sdebug_no_lun_0, int, S_IRUGO | S_IWUSR);
4158module_param_named(no_uld, sdebug_no_uld, int, S_IRUGO);
4159module_param_named(num_parts, sdebug_num_parts, int, S_IRUGO);
4160module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR);
4161module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO);
4162module_param_named(opts, sdebug_opts, int, S_IRUGO | S_IWUSR);
4163module_param_named(physblk_exp, sdebug_physblk_exp, int, S_IRUGO);
4164module_param_named(ptype, sdebug_ptype, int, S_IRUGO | S_IWUSR);
4165module_param_named(removable, sdebug_removable, bool, S_IRUGO | S_IWUSR);
4166module_param_named(scsi_level, sdebug_scsi_level, int, S_IRUGO);
4167module_param_named(sector_size, sdebug_sector_size, int, S_IRUGO);
c4837394 4168module_param_named(statistics, sdebug_statistics, bool, S_IRUGO | S_IWUSR);
773642d9 4169module_param_named(strict, sdebug_strict, bool, S_IRUGO | S_IWUSR);
c4837394 4170module_param_named(submit_queues, submit_queues, int, S_IRUGO);
773642d9
DG		 4171module_param_named(unmap_alignment, sdebug_unmap_alignment, int, S_IRUGO);
4172module_param_named(unmap_granularity, sdebug_unmap_granularity, int, S_IRUGO);
4173module_param_named(unmap_max_blocks, sdebug_unmap_max_blocks, int, S_IRUGO);
4174module_param_named(unmap_max_desc, sdebug_unmap_max_desc, int, S_IRUGO);
4175module_param_named(virtual_gb, sdebug_virtual_gb, int, S_IRUGO | S_IWUSR);
09ba24c1 4176module_param_named(uuid_ctl, sdebug_uuid_ctl, int, S_IRUGO);
773642d9 4177module_param_named(vpd_use_hostno, sdebug_vpd_use_hostno, int,
5b94e232 4178 S_IRUGO | S_IWUSR);
773642d9 4179module_param_named(write_same_length, sdebug_write_same_length, int,
5b94e232 4180 S_IRUGO | S_IWUSR);
1da177e4
LT		 4181
4182MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
4183MODULE_DESCRIPTION("SCSI debug adapter driver");
4184MODULE_LICENSE("GPL");
b01f6f83 4185MODULE_VERSION(SDEBUG_VERSION);
1da177e4
LT		 4186
4187MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
5b94e232 4188MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
0759c666 4189MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
cbf67842 4190MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
c2248fc9 4191MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)");
5b94e232
MP		 4192MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
4193MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
c65b1445 4194MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
beb87c33 4195MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
23183910 4196MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
5b94e232 4197MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
185dd232 4198MODULE_PARM_DESC(host_lock, "host_lock is ignored (def=0)");
5b94e232
MP		 4199MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
4200MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
4201MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
760f3b03
DG		 4202MODULE_PARM_DESC(lbprz,
4203 "on read unmapped LBs return 0 when 1 (def), return 0xff when 2");
5b94e232 4204MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
c65b1445 4205MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
cbf67842
DG		 4206MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
4207MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
c65b1445 4208MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
78d4e5a0 4209MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
1da177e4 4210MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
c65b1445 4211MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
32c5844a 4212MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)");
6f3cbf55 4213MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
5b94e232 4214MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
1da177e4 4215MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
d986788b 4216MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
760f3b03 4217MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=7[SPC-5])");
ea61fca5 4218MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
c4837394 4219MODULE_PARM_DESC(statistics, "collect statistics on commands, queues (def=0)");
c2248fc9 4220MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)");
c4837394 4221MODULE_PARM_DESC(submit_queues, "support for block multi-queue (def=1)");
5b94e232
MP		 4222MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
4223MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
6014759c
MP		 4224MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
4225MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
09ba24c1
DG		 4226MODULE_PARM_DESC(uuid_ctl,
4227 "1->use uuid for lu name, 0->don't, 2->all use same (def=0)");
c2248fc9 4228MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)");
5b94e232
MP		 4229MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
4230MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
1da177e4 4231
760f3b03
DG		 4232#define SDEBUG_INFO_LEN 256
4233static char sdebug_info[SDEBUG_INFO_LEN];
1da177e4
LT		 4234
4235static const char * scsi_debug_info(struct Scsi_Host * shp)
4236{
c4837394
DG		 4237 int k;
4238
760f3b03
DG		 4239 k = scnprintf(sdebug_info, SDEBUG_INFO_LEN, "%s: version %s [%s]\n",
4240 my_name, SDEBUG_VERSION, sdebug_version_date);
4241 if (k >= (SDEBUG_INFO_LEN - 1))
c4837394 4242 return sdebug_info;
760f3b03
DG		 4243 scnprintf(sdebug_info + k, SDEBUG_INFO_LEN - k,
4244 " dev_size_mb=%d, opts=0x%x, submit_queues=%d, %s=%d",
4245 sdebug_dev_size_mb, sdebug_opts, submit_queues,
4246 "statistics", (int)sdebug_statistics);
1da177e4
LT		 4247 return sdebug_info;
4248}
4249
cbf67842 4250/* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */
fd32119b
DG		 4251static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer,
4252 int length)
1da177e4 4253{
c8ed555a
AV		 4254 char arr[16];
4255 int opts;
4256 int minLen = length > 15 ? 15 : length;
1da177e4 4257
c8ed555a
AV		 4258 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
4259 return -EACCES;
4260 memcpy(arr, buffer, minLen);
4261 arr[minLen] = '\0';
4262 if (1 != sscanf(arr, "%d", &opts))
4263 return -EINVAL;
773642d9
DG		 4264 sdebug_opts = opts;
4265 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
4266 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
4267 if (sdebug_every_nth != 0)
c4837394 4268 tweak_cmnd_count();
c8ed555a
AV		 4269 return length;
4270}
1da177e4 4271
cbf67842
DG		 4272/* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the
4273 * same for each scsi_debug host (if more than one). Some of the counters
4274 * output are not atomics so might be inaccurate in a busy system. */
c8ed555a
AV		 4275static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
4276{
c4837394
DG		 4277 int f, j, l;
4278 struct sdebug_queue *sqp;
4279
4280 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n",
4281 SDEBUG_VERSION, sdebug_version_date);
4282 seq_printf(m, "num_tgts=%d, %ssize=%d MB, opts=0x%x, every_nth=%d\n",
4283 sdebug_num_tgts, "shared (ram) ", sdebug_dev_size_mb,
4284 sdebug_opts, sdebug_every_nth);
4285 seq_printf(m, "delay=%d, ndelay=%d, max_luns=%d, sector_size=%d %s\n",
4286 sdebug_jdelay, sdebug_ndelay, sdebug_max_luns,
4287 sdebug_sector_size, "bytes");
4288 seq_printf(m, "cylinders=%d, heads=%d, sectors=%d, command aborts=%d\n",
4289 sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per,
4290 num_aborts);
4291 seq_printf(m, "RESETs: device=%d, target=%d, bus=%d, host=%d\n",
4292 num_dev_resets, num_target_resets, num_bus_resets,
4293 num_host_resets);
4294 seq_printf(m, "dix_reads=%d, dix_writes=%d, dif_errors=%d\n",
4295 dix_reads, dix_writes, dif_errors);
4296 seq_printf(m, "usec_in_jiffy=%lu, %s=%d, mq_active=%d\n",
4297 TICK_NSEC / 1000, "statistics", sdebug_statistics,
4298 sdebug_mq_active);
4299 seq_printf(m, "cmnd_count=%d, completions=%d, %s=%d, a_tsf=%d\n",
4300 atomic_read(&sdebug_cmnd_count),
4301 atomic_read(&sdebug_completions),
4302 "miss_cpus", atomic_read(&sdebug_miss_cpus),
4303 atomic_read(&sdebug_a_tsf));
4304
4305 seq_printf(m, "submit_queues=%d\n", submit_queues);
4306 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
4307 seq_printf(m, " queue %d:\n", j);
4308 f = find_first_bit(sqp->in_use_bm, sdebug_max_queue);
4309 if (f != sdebug_max_queue) {
4310 l = find_last_bit(sqp->in_use_bm, sdebug_max_queue);
4311 seq_printf(m, " in_use_bm BUSY: %s: %d,%d\n",
4312 "first,last bits", f, l);
4313 }
cbf67842 4314 }
c8ed555a 4315 return 0;
1da177e4
LT		 4316}
4317
82069379 4318static ssize_t delay_show(struct device_driver *ddp, char *buf)
1da177e4 4319{
c2206098 4320 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_jdelay);
1da177e4 4321}
c4837394
DG		 4322/* Returns -EBUSY if jdelay is being changed and commands are queued. The unit
4323 * of delay is jiffies.
4324 */
82069379
AM		 4325static ssize_t delay_store(struct device_driver *ddp, const char *buf,
4326 size_t count)
1da177e4 4327{
c2206098 4328 int jdelay, res;
cbf67842 4329
b01f6f83 4330 if (count > 0 && sscanf(buf, "%d", &jdelay) == 1) {
cbf67842 4331 res = count;
c2206098 4332 if (sdebug_jdelay != jdelay) {
c4837394
DG		 4333 int j, k;
4334 struct sdebug_queue *sqp;
4335
4336 block_unblock_all_queues(true);
4337 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
4338 ++j, ++sqp) {
4339 k = find_first_bit(sqp->in_use_bm,
4340 sdebug_max_queue);
4341 if (k != sdebug_max_queue) {
4342 res = -EBUSY; /* queued commands */
4343 break;
4344 }
4345 }
4346 if (res > 0) {
a10bc12a
DG		 4347 /* make sure sdebug_defer instances get
4348 * re-allocated for new delay variant */
4349 free_all_queued();
c2206098 4350 sdebug_jdelay = jdelay;
773642d9 4351 sdebug_ndelay = 0;
cbf67842 4352 }
c4837394 4353 block_unblock_all_queues(false);
1da177e4 4354 }
cbf67842 4355 return res;
1da177e4
LT		 4356 }
4357 return -EINVAL;
4358}
82069379 4359static DRIVER_ATTR_RW(delay);
1da177e4 4360
cbf67842
DG		 4361static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
4362{
773642d9 4363 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ndelay);
cbf67842
DG		 4364}
4365/* Returns -EBUSY if ndelay is being changed and commands are queued */
c2206098 4366/* If > 0 and accepted then sdebug_jdelay is set to JDELAY_OVERRIDDEN */
cbf67842 4367static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
fd32119b 4368 size_t count)
cbf67842 4369{
c4837394 4370 int ndelay, res;
cbf67842
DG		 4371
4372 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
c4837394 4373 (ndelay >= 0) && (ndelay < (1000 * 1000 * 1000))) {
cbf67842 4374 res = count;
773642d9 4375 if (sdebug_ndelay != ndelay) {
c4837394
DG		 4376 int j, k;
4377 struct sdebug_queue *sqp;
4378
4379 block_unblock_all_queues(true);
4380 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
4381 ++j, ++sqp) {
4382 k = find_first_bit(sqp->in_use_bm,
4383 sdebug_max_queue);
4384 if (k != sdebug_max_queue) {
4385 res = -EBUSY; /* queued commands */
4386 break;
4387 }
4388 }
4389 if (res > 0) {
a10bc12a
DG		 4390 /* make sure sdebug_defer instances get
4391 * re-allocated for new delay variant */
4392 free_all_queued();
773642d9 4393 sdebug_ndelay = ndelay;
c2206098
DG		 4394 sdebug_jdelay = ndelay ? JDELAY_OVERRIDDEN
4395 : DEF_JDELAY;
cbf67842 4396 }
c4837394 4397 block_unblock_all_queues(false);
cbf67842
DG		 4398 }
4399 return res;
4400 }
4401 return -EINVAL;
4402}
4403static DRIVER_ATTR_RW(ndelay);
4404
82069379 4405static ssize_t opts_show(struct device_driver *ddp, char *buf)
1da177e4 4406{
773642d9 4407 return scnprintf(buf, PAGE_SIZE, "0x%x\n", sdebug_opts);
1da177e4
LT		 4408}
4409
82069379
AM		 4410static ssize_t opts_store(struct device_driver *ddp, const char *buf,
4411 size_t count)
1da177e4
LT		 4412{
4413 int opts;
4414 char work[20];
4415
4416 if (1 == sscanf(buf, "%10s", work)) {
48a96876 4417 if (0 == strncasecmp(work,"0x", 2)) {
1da177e4
LT		 4418 if (1 == sscanf(&work[2], "%x", &opts))
4419 goto opts_done;
4420 } else {
4421 if (1 == sscanf(work, "%d", &opts))
4422 goto opts_done;
4423 }
4424 }
4425 return -EINVAL;
4426opts_done:
773642d9
DG		 4427 sdebug_opts = opts;
4428 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
4429 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
c4837394 4430 tweak_cmnd_count();
1da177e4
LT		 4431 return count;
4432}
82069379 4433static DRIVER_ATTR_RW(opts);
1da177e4 4434
82069379 4435static ssize_t ptype_show(struct device_driver *ddp, char *buf)
1da177e4 4436{
773642d9 4437 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ptype);
1da177e4 4438}
82069379
AM		 4439static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
4440 size_t count)
1da177e4
LT		 4441{
4442 int n;
4443
4444 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
773642d9 4445 sdebug_ptype = n;
1da177e4
LT		 4446 return count;
4447 }
4448 return -EINVAL;
4449}
82069379 4450static DRIVER_ATTR_RW(ptype);
1da177e4 4451
82069379 4452static ssize_t dsense_show(struct device_driver *ddp, char *buf)
1da177e4 4453{
773642d9 4454 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dsense);
1da177e4 4455}
82069379
AM		 4456static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
4457 size_t count)
1da177e4
LT		 4458{
4459 int n;
4460
4461 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
773642d9 4462 sdebug_dsense = n;
1da177e4
LT		 4463 return count;
4464 }
4465 return -EINVAL;
4466}
82069379 4467static DRIVER_ATTR_RW(dsense);
1da177e4 4468
82069379 4469static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
23183910 4470{
773642d9 4471 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_fake_rw);
23183910 4472}
82069379
AM		 4473static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
4474 size_t count)
23183910
DG		 4475{
4476 int n;
4477
4478 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
cbf67842 4479 n = (n > 0);
773642d9
DG		 4480 sdebug_fake_rw = (sdebug_fake_rw > 0);
4481 if (sdebug_fake_rw != n) {
cbf67842
DG		 4482 if ((0 == n) && (NULL == fake_storep)) {
4483 unsigned long sz =
773642d9 4484 (unsigned long)sdebug_dev_size_mb *
cbf67842
DG		 4485 1048576;
4486
4487 fake_storep = vmalloc(sz);
4488 if (NULL == fake_storep) {
c1287970 4489 pr_err("out of memory, 9\n");
cbf67842
DG		 4490 return -ENOMEM;
4491 }
4492 memset(fake_storep, 0, sz);
4493 }
773642d9 4494 sdebug_fake_rw = n;
cbf67842 4495 }
23183910
DG		 4496 return count;
4497 }
4498 return -EINVAL;
4499}
82069379 4500static DRIVER_ATTR_RW(fake_rw);
23183910 4501
82069379 4502static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
c65b1445 4503{
773642d9 4504 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_lun_0);
c65b1445 4505}
82069379
AM		 4506static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
4507 size_t count)
c65b1445
DG		 4508{
4509 int n;
4510
4511 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
773642d9 4512 sdebug_no_lun_0 = n;
c65b1445
DG		 4513 return count;
4514 }
4515 return -EINVAL;
4516}
82069379 4517static DRIVER_ATTR_RW(no_lun_0);
c65b1445 4518
82069379 4519static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
1da177e4 4520{
773642d9 4521 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_tgts);
1da177e4 4522}
82069379
AM		 4523static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
4524 size_t count)
1da177e4
LT		 4525{
4526 int n;
4527
4528 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
773642d9 4529 sdebug_num_tgts = n;
1da177e4
LT		 4530 sdebug_max_tgts_luns();
4531 return count;
4532 }
4533 return -EINVAL;
4534}
82069379 4535static DRIVER_ATTR_RW(num_tgts);
1da177e4 4536
82069379 4537static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
1da177e4 4538{
773642d9 4539 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dev_size_mb);
1da177e4 4540}
82069379 4541static DRIVER_ATTR_RO(dev_size_mb);
1da177e4 4542
82069379 4543static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
1da177e4 4544{
773642d9 4545 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_parts);
1da177e4 4546}
82069379 4547static DRIVER_ATTR_RO(num_parts);
1da177e4 4548
82069379 4549static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
1da177e4 4550{
773642d9 4551 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_every_nth);
1da177e4 4552}
82069379
AM		 4553static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
4554 size_t count)
1da177e4
LT		 4555{
4556 int nth;
4557
4558 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
773642d9 4559 sdebug_every_nth = nth;
c4837394
DG		 4560 if (nth && !sdebug_statistics) {
4561 pr_info("every_nth needs statistics=1, set it\n");
4562 sdebug_statistics = true;
4563 }
4564 tweak_cmnd_count();
1da177e4
LT		 4565 return count;
4566 }
4567 return -EINVAL;
4568}
82069379 4569static DRIVER_ATTR_RW(every_nth);
1da177e4 4570
82069379 4571static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
1da177e4 4572{
773642d9 4573 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_luns);
1da177e4 4574}
82069379
AM		 4575static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
4576 size_t count)
1da177e4
LT		 4577{
4578 int n;
19c8ead7 4579 bool changed;
1da177e4
LT		 4580
4581 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
8d039e22
DG		 4582 if (n > 256) {
4583 pr_warn("max_luns can be no more than 256\n");
4584 return -EINVAL;
4585 }
773642d9
DG		 4586 changed = (sdebug_max_luns != n);
4587 sdebug_max_luns = n;
1da177e4 4588 sdebug_max_tgts_luns();
773642d9 4589 if (changed && (sdebug_scsi_level >= 5)) { /* >= SPC-3 */
19c8ead7
EM		 4590 struct sdebug_host_info *sdhp;
4591 struct sdebug_dev_info *dp;
4592
4593 spin_lock(&sdebug_host_list_lock);
4594 list_for_each_entry(sdhp, &sdebug_host_list,
4595 host_list) {
4596 list_for_each_entry(dp, &sdhp->dev_info_list,
4597 dev_list) {
4598 set_bit(SDEBUG_UA_LUNS_CHANGED,
4599 dp->uas_bm);
4600 }
4601 }
4602 spin_unlock(&sdebug_host_list_lock);
4603 }
1da177e4
LT		 4604 return count;
4605 }
4606 return -EINVAL;
4607}
82069379 4608static DRIVER_ATTR_RW(max_luns);
1da177e4 4609
82069379 4610static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
78d4e5a0 4611{
773642d9 4612 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_queue);
78d4e5a0 4613}
cbf67842
DG		 4614/* N.B. max_queue can be changed while there are queued commands. In flight
4615 * commands beyond the new max_queue will be completed. */
82069379
AM		 4616static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
4617 size_t count)
78d4e5a0 4618{
c4837394
DG		 4619 int j, n, k, a;
4620 struct sdebug_queue *sqp;
78d4e5a0
DG		 4621
4622 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
c4837394
DG		 4623 (n <= SDEBUG_CANQUEUE)) {
4624 block_unblock_all_queues(true);
4625 k = 0;
4626 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
4627 ++j, ++sqp) {
4628 a = find_last_bit(sqp->in_use_bm, SDEBUG_CANQUEUE);
4629 if (a > k)
4630 k = a;
4631 }
773642d9 4632 sdebug_max_queue = n;
c4837394 4633 if (k == SDEBUG_CANQUEUE)
cbf67842
DG		 4634 atomic_set(&retired_max_queue, 0);
4635 else if (k >= n)
4636 atomic_set(&retired_max_queue, k + 1);
4637 else
4638 atomic_set(&retired_max_queue, 0);
c4837394 4639 block_unblock_all_queues(false);
78d4e5a0
DG		 4640 return count;
4641 }
4642 return -EINVAL;
4643}
82069379 4644static DRIVER_ATTR_RW(max_queue);
78d4e5a0 4645
82069379 4646static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
78d4e5a0 4647{
773642d9 4648 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_uld);
78d4e5a0 4649}
82069379 4650static DRIVER_ATTR_RO(no_uld);
78d4e5a0 4651
82069379 4652static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
1da177e4 4653{
773642d9 4654 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_scsi_level);
1da177e4 4655}
82069379 4656static DRIVER_ATTR_RO(scsi_level);
1da177e4 4657
82069379 4658static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
c65b1445 4659{
773642d9 4660 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_virtual_gb);
c65b1445 4661}
82069379
AM		 4662static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
4663 size_t count)
c65b1445 4664{
c2248fc9 4665 int n;
0d01c5df 4666 bool changed;
c65b1445
DG		 4667
4668 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
773642d9
DG		 4669 changed = (sdebug_virtual_gb != n);
4670 sdebug_virtual_gb = n;
28898873 4671 sdebug_capacity = get_sdebug_capacity();
0d01c5df
DG		 4672 if (changed) {
4673 struct sdebug_host_info *sdhp;
4674 struct sdebug_dev_info *dp;
4675
4bc6b634 4676 spin_lock(&sdebug_host_list_lock);
0d01c5df
DG		 4677 list_for_each_entry(sdhp, &sdebug_host_list,
4678 host_list) {
4679 list_for_each_entry(dp, &sdhp->dev_info_list,
4680 dev_list) {
4681 set_bit(SDEBUG_UA_CAPACITY_CHANGED,
4682 dp->uas_bm);
4683 }
4684 }
4bc6b634 4685 spin_unlock(&sdebug_host_list_lock);
0d01c5df 4686 }
c65b1445
DG		 4687 return count;
4688 }
4689 return -EINVAL;
4690}
82069379 4691static DRIVER_ATTR_RW(virtual_gb);
c65b1445 4692
82069379 4693static ssize_t add_host_show(struct device_driver *ddp, char *buf)
1da177e4 4694{
773642d9 4695 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_add_host);
1da177e4
LT		 4696}
4697
fd32119b
DG		 4698static int sdebug_add_adapter(void);
4699static void sdebug_remove_adapter(void);
4700
82069379
AM		 4701static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
4702 size_t count)
1da177e4 4703{
f3df41cf 4704 int delta_hosts;
1da177e4 4705
f3df41cf 4706 if (sscanf(buf, "%d", &delta_hosts) != 1)
1da177e4 4707 return -EINVAL;
1da177e4
LT		 4708 if (delta_hosts > 0) {
4709 do {
4710 sdebug_add_adapter();
4711 } while (--delta_hosts);
4712 } else if (delta_hosts < 0) {
4713 do {
4714 sdebug_remove_adapter();
4715 } while (++delta_hosts);
4716 }
4717 return count;
4718}
82069379 4719static DRIVER_ATTR_RW(add_host);
1da177e4 4720
82069379 4721static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
23183910 4722{
773642d9 4723 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_vpd_use_hostno);
23183910 4724}
82069379
AM		 4725static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
4726 size_t count)
23183910
DG		 4727{
4728 int n;
4729
4730 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
773642d9 4731 sdebug_vpd_use_hostno = n;
23183910
DG		 4732 return count;
4733 }
4734 return -EINVAL;
4735}
82069379 4736static DRIVER_ATTR_RW(vpd_use_hostno);
23183910 4737
c4837394
DG		 4738static ssize_t statistics_show(struct device_driver *ddp, char *buf)
4739{
4740 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_statistics);
4741}
4742static ssize_t statistics_store(struct device_driver *ddp, const char *buf,
4743 size_t count)
4744{
4745 int n;
4746
4747 if ((count > 0) && (sscanf(buf, "%d", &n) == 1) && (n >= 0)) {
4748 if (n > 0)
4749 sdebug_statistics = true;
4750 else {
4751 clear_queue_stats();
4752 sdebug_statistics = false;
4753 }
4754 return count;
4755 }
4756 return -EINVAL;
4757}
4758static DRIVER_ATTR_RW(statistics);
4759
82069379 4760static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
597136ab 4761{
773642d9 4762 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_sector_size);
597136ab 4763}
82069379 4764static DRIVER_ATTR_RO(sector_size);
597136ab 4765
c4837394
DG		 4766static ssize_t submit_queues_show(struct device_driver *ddp, char *buf)
4767{
4768 return scnprintf(buf, PAGE_SIZE, "%d\n", submit_queues);
4769}
4770static DRIVER_ATTR_RO(submit_queues);
4771
82069379 4772static ssize_t dix_show(struct device_driver *ddp, char *buf)
c6a44287 4773{
773642d9 4774 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dix);
c6a44287 4775}
82069379 4776static DRIVER_ATTR_RO(dix);
c6a44287 4777
82069379 4778static ssize_t dif_show(struct device_driver *ddp, char *buf)
c6a44287 4779{
773642d9 4780 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dif);
c6a44287 4781}
82069379 4782static DRIVER_ATTR_RO(dif);
c6a44287 4783
82069379 4784static ssize_t guard_show(struct device_driver *ddp, char *buf)
c6a44287 4785{
773642d9 4786 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_guard);
c6a44287 4787}
82069379 4788static DRIVER_ATTR_RO(guard);
c6a44287 4789
82069379 4790static ssize_t ato_show(struct device_driver *ddp, char *buf)
c6a44287 4791{
773642d9 4792 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ato);
c6a44287 4793}
82069379 4794static DRIVER_ATTR_RO(ato);
c6a44287 4795
82069379 4796static ssize_t map_show(struct device_driver *ddp, char *buf)
44d92694
MP		 4797{
4798 ssize_t count;
4799
5b94e232 4800 if (!scsi_debug_lbp())
44d92694
MP		 4801 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
4802 sdebug_store_sectors);
4803
c7badc90
TH		 4804 count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
4805 (int)map_size, map_storep);
44d92694 4806 buf[count++] = '\n';
c7badc90 4807 buf[count] = '\0';
44d92694
MP		 4808
4809 return count;
4810}
82069379 4811static DRIVER_ATTR_RO(map);
44d92694 4812
82069379 4813static ssize_t removable_show(struct device_driver *ddp, char *buf)
d986788b 4814{
773642d9 4815 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_removable ? 1 : 0);
d986788b 4816}
82069379
AM		 4817static ssize_t removable_store(struct device_driver *ddp, const char *buf,
4818 size_t count)
d986788b
MP		 4819{
4820 int n;
4821
4822 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
773642d9 4823 sdebug_removable = (n > 0);
d986788b
MP		 4824 return count;
4825 }
4826 return -EINVAL;
4827}
82069379 4828static DRIVER_ATTR_RW(removable);
d986788b 4829
cbf67842
DG		 4830static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
4831{
773642d9 4832 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_host_lock);
cbf67842 4833}
185dd232 4834/* N.B. sdebug_host_lock does nothing, kept for backward compatibility */
cbf67842
DG		 4835static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
4836 size_t count)
4837{
185dd232 4838 int n;
cbf67842
DG		 4839
4840 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
185dd232
DG		 4841 sdebug_host_lock = (n > 0);
4842 return count;
cbf67842
DG		 4843 }
4844 return -EINVAL;
4845}
4846static DRIVER_ATTR_RW(host_lock);
4847
c2248fc9
DG		 4848static ssize_t strict_show(struct device_driver *ddp, char *buf)
4849{
773642d9 4850 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_strict);
c2248fc9
DG		 4851}
4852static ssize_t strict_store(struct device_driver *ddp, const char *buf,
4853 size_t count)
4854{
4855 int n;
4856
4857 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
773642d9 4858 sdebug_strict = (n > 0);
c2248fc9
DG		 4859 return count;
4860 }
4861 return -EINVAL;
4862}
4863static DRIVER_ATTR_RW(strict);
4864
09ba24c1
DG		 4865static ssize_t uuid_ctl_show(struct device_driver *ddp, char *buf)
4866{
4867 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_uuid_ctl);
4868}
4869static DRIVER_ATTR_RO(uuid_ctl);
4870
cbf67842 4871
82069379 4872/* Note: The following array creates attribute files in the
23183910
DG		 4873 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
4874 files (over those found in the /sys/module/scsi_debug/parameters
4875 directory) is that auxiliary actions can be triggered when an attribute
4876 is changed. For example see: sdebug_add_host_store() above.
4877 */
6ecaff7f 4878
82069379
AM		 4879static struct attribute *sdebug_drv_attrs[] = {
4880 &driver_attr_delay.attr,
4881 &driver_attr_opts.attr,
4882 &driver_attr_ptype.attr,
4883 &driver_attr_dsense.attr,
4884 &driver_attr_fake_rw.attr,
4885 &driver_attr_no_lun_0.attr,
4886 &driver_attr_num_tgts.attr,
4887 &driver_attr_dev_size_mb.attr,
4888 &driver_attr_num_parts.attr,
4889 &driver_attr_every_nth.attr,
4890 &driver_attr_max_luns.attr,
4891 &driver_attr_max_queue.attr,
4892 &driver_attr_no_uld.attr,
4893 &driver_attr_scsi_level.attr,
4894 &driver_attr_virtual_gb.attr,
4895 &driver_attr_add_host.attr,
4896 &driver_attr_vpd_use_hostno.attr,
4897 &driver_attr_sector_size.attr,
c4837394
DG		 4898 &driver_attr_statistics.attr,
4899 &driver_attr_submit_queues.attr,
82069379
AM		 4900 &driver_attr_dix.attr,
4901 &driver_attr_dif.attr,
4902 &driver_attr_guard.attr,
4903 &driver_attr_ato.attr,
4904 &driver_attr_map.attr,
4905 &driver_attr_removable.attr,
cbf67842
DG		 4906 &driver_attr_host_lock.attr,
4907 &driver_attr_ndelay.attr,
c2248fc9 4908 &driver_attr_strict.attr,
09ba24c1 4909 &driver_attr_uuid_ctl.attr,
82069379
AM		 4910 NULL,
4911};
4912ATTRIBUTE_GROUPS(sdebug_drv);
1da177e4 4913
11ddceca 4914static struct device *pseudo_primary;
8dea0d02 4915
1da177e4
LT		 4916static int __init scsi_debug_init(void)
4917{
5f2578e5 4918 unsigned long sz;
1da177e4
LT		 4919 int host_to_add;
4920 int k;
6ecaff7f 4921 int ret;
1da177e4 4922
cbf67842
DG		 4923 atomic_set(&retired_max_queue, 0);
4924
773642d9 4925 if (sdebug_ndelay >= 1000 * 1000 * 1000) {
c1287970 4926 pr_warn("ndelay must be less than 1 second, ignored\n");
773642d9
DG		 4927 sdebug_ndelay = 0;
4928 } else if (sdebug_ndelay > 0)
c2206098 4929 sdebug_jdelay = JDELAY_OVERRIDDEN;
cbf67842 4930
773642d9 4931 switch (sdebug_sector_size) {
597136ab
MP		 4932 case 512:
4933 case 1024:
4934 case 2048:
4935 case 4096:
4936 break;
4937 default:
773642d9 4938 pr_err("invalid sector_size %d\n", sdebug_sector_size);
597136ab
MP		 4939 return -EINVAL;
4940 }
4941
773642d9 4942 switch (sdebug_dif) {
8475c811 4943 case T10_PI_TYPE0_PROTECTION:
f46eb0e9 4944 break;
8475c811
CH		 4945 case T10_PI_TYPE1_PROTECTION:
4946 case T10_PI_TYPE2_PROTECTION:
4947 case T10_PI_TYPE3_PROTECTION:
f46eb0e9 4948 have_dif_prot = true;
c6a44287
MP		 4949 break;
4950
4951 default:
c1287970 4952 pr_err("dif must be 0, 1, 2 or 3\n");
c6a44287
MP		 4953 return -EINVAL;
4954 }
4955
773642d9 4956 if (sdebug_guard > 1) {
c1287970 4957 pr_err("guard must be 0 or 1\n");
c6a44287
MP		 4958 return -EINVAL;
4959 }
4960
773642d9 4961 if (sdebug_ato > 1) {
c1287970 4962 pr_err("ato must be 0 or 1\n");
c6a44287
MP		 4963 return -EINVAL;
4964 }
4965
773642d9
DG		 4966 if (sdebug_physblk_exp > 15) {
4967 pr_err("invalid physblk_exp %u\n", sdebug_physblk_exp);
ea61fca5
MP		 4968 return -EINVAL;
4969 }
8d039e22
DG		 4970 if (sdebug_max_luns > 256) {
4971 pr_warn("max_luns can be no more than 256, use default\n");
4972 sdebug_max_luns = DEF_MAX_LUNS;
4973 }
ea61fca5 4974
773642d9
DG		 4975 if (sdebug_lowest_aligned > 0x3fff) {
4976 pr_err("lowest_aligned too big: %u\n", sdebug_lowest_aligned);
ea61fca5
MP		 4977 return -EINVAL;
4978 }
4979
c4837394
DG		 4980 if (submit_queues < 1) {
4981 pr_err("submit_queues must be 1 or more\n");
4982 return -EINVAL;
4983 }
4984 sdebug_q_arr = kcalloc(submit_queues, sizeof(struct sdebug_queue),
4985 GFP_KERNEL);
4986 if (sdebug_q_arr == NULL)
4987 return -ENOMEM;
4988 for (k = 0; k < submit_queues; ++k)
4989 spin_lock_init(&sdebug_q_arr[k].qc_lock);
4990
773642d9
DG		 4991 if (sdebug_dev_size_mb < 1)
4992 sdebug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
4993 sz = (unsigned long)sdebug_dev_size_mb * 1048576;
4994 sdebug_store_sectors = sz / sdebug_sector_size;
28898873 4995 sdebug_capacity = get_sdebug_capacity();
1da177e4
LT		 4996
4997 /* play around with geometry, don't waste too much on track 0 */
4998 sdebug_heads = 8;
4999 sdebug_sectors_per = 32;
773642d9 5000 if (sdebug_dev_size_mb >= 256)
1da177e4 5001 sdebug_heads = 64;
773642d9 5002 else if (sdebug_dev_size_mb >= 16)
fa785f0a 5003 sdebug_heads = 32;
1da177e4
LT		 5004 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
5005 (sdebug_sectors_per * sdebug_heads);
5006 if (sdebug_cylinders_per >= 1024) {
5007 /* other LLDs do this; implies >= 1GB ram disk ... */
5008 sdebug_heads = 255;
5009 sdebug_sectors_per = 63;
5010 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
5011 (sdebug_sectors_per * sdebug_heads);
5012 }
5013
b01f6f83 5014 if (sdebug_fake_rw == 0) {
cbf67842
DG		 5015 fake_storep = vmalloc(sz);
5016 if (NULL == fake_storep) {
c1287970 5017 pr_err("out of memory, 1\n");
c4837394
DG		 5018 ret = -ENOMEM;
5019 goto free_q_arr;
cbf67842
DG		 5020 }
5021 memset(fake_storep, 0, sz);
773642d9 5022 if (sdebug_num_parts > 0)
cbf67842 5023 sdebug_build_parts(fake_storep, sz);
1da177e4 5024 }
1da177e4 5025
773642d9 5026 if (sdebug_dix) {
c6a44287
MP		 5027 int dif_size;
5028
6ebf105c 5029 dif_size = sdebug_store_sectors * sizeof(struct t10_pi_tuple);
c6a44287
MP		 5030 dif_storep = vmalloc(dif_size);
5031
c1287970 5032 pr_err("dif_storep %u bytes @ %p\n", dif_size, dif_storep);
c6a44287
MP		 5033
5034 if (dif_storep == NULL) {
c1287970 5035 pr_err("out of mem. (DIX)\n");
c6a44287
MP		 5036 ret = -ENOMEM;
5037 goto free_vm;
5038 }
5039
5040 memset(dif_storep, 0xff, dif_size);
5041 }
5042
5b94e232
MP		 5043 /* Logical Block Provisioning */
5044 if (scsi_debug_lbp()) {
773642d9
DG		 5045 sdebug_unmap_max_blocks =
5046 clamp(sdebug_unmap_max_blocks, 0U, 0xffffffffU);
6014759c 5047
773642d9
DG		 5048 sdebug_unmap_max_desc =
5049 clamp(sdebug_unmap_max_desc, 0U, 256U);
6014759c 5050
773642d9
DG		 5051 sdebug_unmap_granularity =
5052 clamp(sdebug_unmap_granularity, 1U, 0xffffffffU);
6014759c 5053
773642d9
DG		 5054 if (sdebug_unmap_alignment &&
5055 sdebug_unmap_granularity <=
5056 sdebug_unmap_alignment) {
c1287970 5057 pr_err("ERR: unmap_granularity <= unmap_alignment\n");
c4837394
DG		 5058 ret = -EINVAL;
5059 goto free_vm;
44d92694
MP		 5060 }
5061
b90ebc3d
AM		 5062 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
5063 map_storep = vmalloc(BITS_TO_LONGS(map_size) * sizeof(long));
44d92694 5064
c1287970 5065 pr_info("%lu provisioning blocks\n", map_size);
44d92694
MP		 5066
5067 if (map_storep == NULL) {
c1287970 5068 pr_err("out of mem. (MAP)\n");
44d92694
MP		 5069 ret = -ENOMEM;
5070 goto free_vm;
5071 }
5072
b90ebc3d 5073 bitmap_zero(map_storep, map_size);
44d92694
MP		 5074
5075 /* Map first 1KB for partition table */
773642d9 5076 if (sdebug_num_parts)
44d92694
MP		 5077 map_region(0, 2);
5078 }
5079
9b906779
NB		 5080 pseudo_primary = root_device_register("pseudo_0");
5081 if (IS_ERR(pseudo_primary)) {
c1287970 5082 pr_warn("root_device_register() error\n");
9b906779 5083 ret = PTR_ERR(pseudo_primary);
6ecaff7f
RD		 5084 goto free_vm;
5085 }
5086 ret = bus_register(&pseudo_lld_bus);
5087 if (ret < 0) {
c1287970 5088 pr_warn("bus_register error: %d\n", ret);
6ecaff7f
RD		 5089 goto dev_unreg;
5090 }
5091 ret = driver_register(&sdebug_driverfs_driver);
5092 if (ret < 0) {
c1287970 5093 pr_warn("driver_register error: %d\n", ret);
6ecaff7f
RD		 5094 goto bus_unreg;
5095 }
1da177e4 5096
773642d9
DG		 5097 host_to_add = sdebug_add_host;
5098 sdebug_add_host = 0;
1da177e4
LT		 5099
5100 for (k = 0; k < host_to_add; k++) {
5101 if (sdebug_add_adapter()) {
c1287970 5102 pr_err("sdebug_add_adapter failed k=%d\n", k);
1da177e4
LT		 5103 break;
5104 }
5105 }
5106
773642d9
DG		 5107 if (sdebug_verbose)
5108 pr_info("built %d host(s)\n", sdebug_add_host);
c1287970 5109
1da177e4 5110 return 0;
6ecaff7f 5111
6ecaff7f
RD		 5112bus_unreg:
5113 bus_unregister(&pseudo_lld_bus);
5114dev_unreg:
9b906779 5115 root_device_unregister(pseudo_primary);
6ecaff7f 5116free_vm:
de232af6
TW		 5117 vfree(map_storep);
5118 vfree(dif_storep);
6ecaff7f 5119 vfree(fake_storep);
c4837394
DG		 5120free_q_arr:
5121 kfree(sdebug_q_arr);
6ecaff7f 5122 return ret;
1da177e4
LT		 5123}
5124
5125static void __exit scsi_debug_exit(void)
5126{
773642d9 5127 int k = sdebug_add_host;
1da177e4
LT		 5128
5129 stop_all_queued();
cbf67842 5130 free_all_queued();
1da177e4
LT		 5131 for (; k; k--)
5132 sdebug_remove_adapter();
1da177e4
LT		 5133 driver_unregister(&sdebug_driverfs_driver);
5134 bus_unregister(&pseudo_lld_bus);
9b906779 5135 root_device_unregister(pseudo_primary);
1da177e4 5136
4d2b496f 5137 vfree(map_storep);
de232af6 5138 vfree(dif_storep);
1da177e4 5139 vfree(fake_storep);
c4837394 5140 kfree(sdebug_q_arr);
1da177e4
LT		 5141}
5142
5143device_initcall(scsi_debug_init);
5144module_exit(scsi_debug_exit);
5145
1da177e4
LT		 5146static void sdebug_release_adapter(struct device * dev)
5147{
5148 struct sdebug_host_info *sdbg_host;
5149
5150 sdbg_host = to_sdebug_host(dev);
5151 kfree(sdbg_host);
5152}
5153
5154static int sdebug_add_adapter(void)
5155{
5156 int k, devs_per_host;
5157 int error = 0;
5158 struct sdebug_host_info *sdbg_host;
8b40228f 5159 struct sdebug_dev_info *sdbg_devinfo, *tmp;
1da177e4 5160
c65b1445 5161 sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL);
1da177e4 5162 if (NULL == sdbg_host) {
c1287970 5163 pr_err("out of memory at line %d\n", __LINE__);
1da177e4
LT		 5164 return -ENOMEM;
5165 }
5166
1da177e4
LT		 5167 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
5168
773642d9 5169 devs_per_host = sdebug_num_tgts * sdebug_max_luns;
1da177e4 5170 for (k = 0; k < devs_per_host; k++) {
5cb2fc06
FT		 5171 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
5172 if (!sdbg_devinfo) {
c1287970 5173 pr_err("out of memory at line %d\n", __LINE__);
1da177e4
LT		 5174 error = -ENOMEM;
5175 goto clean;
5176 }
1da177e4
LT		 5177 }
5178
5179 spin_lock(&sdebug_host_list_lock);
5180 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
5181 spin_unlock(&sdebug_host_list_lock);
5182
5183 sdbg_host->dev.bus = &pseudo_lld_bus;
9b906779 5184 sdbg_host->dev.parent = pseudo_primary;
1da177e4 5185 sdbg_host->dev.release = &sdebug_release_adapter;
773642d9 5186 dev_set_name(&sdbg_host->dev, "adapter%d", sdebug_add_host);
1da177e4
LT		 5187
5188 error = device_register(&sdbg_host->dev);
5189
5190 if (error)
5191 goto clean;
5192
773642d9 5193 ++sdebug_add_host;
1da177e4
LT		 5194 return error;
5195
5196clean:
8b40228f
FT		 5197 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
5198 dev_list) {
1da177e4
LT		 5199 list_del(&sdbg_devinfo->dev_list);
5200 kfree(sdbg_devinfo);
5201 }
5202
5203 kfree(sdbg_host);
5204 return error;
5205}
5206
5207static void sdebug_remove_adapter(void)
5208{
5209 struct sdebug_host_info * sdbg_host = NULL;
5210
5211 spin_lock(&sdebug_host_list_lock);
5212 if (!list_empty(&sdebug_host_list)) {
5213 sdbg_host = list_entry(sdebug_host_list.prev,
5214 struct sdebug_host_info, host_list);
5215 list_del(&sdbg_host->host_list);
5216 }
5217 spin_unlock(&sdebug_host_list_lock);
5218
5219 if (!sdbg_host)
5220 return;
5221
773642d9
DG		 5222 device_unregister(&sdbg_host->dev);
5223 --sdebug_add_host;
1da177e4
LT		 5224}
5225
fd32119b 5226static int sdebug_change_qdepth(struct scsi_device *sdev, int qdepth)
cbf67842
DG		 5227{
5228 int num_in_q = 0;
cbf67842
DG		 5229 struct sdebug_dev_info *devip;
5230
c4837394 5231 block_unblock_all_queues(true);
cbf67842
DG		 5232 devip = (struct sdebug_dev_info *)sdev->hostdata;
5233 if (NULL == devip) {
c4837394 5234 block_unblock_all_queues(false);
cbf67842
DG		 5235 return -ENODEV;
5236 }
5237 num_in_q = atomic_read(&devip->num_in_q);
c40ecc12
CH		 5238
5239 if (qdepth < 1)
5240 qdepth = 1;
c4837394
DG		 5241 /* allow to exceed max host qc_arr elements for testing */
5242 if (qdepth > SDEBUG_CANQUEUE + 10)
5243 qdepth = SDEBUG_CANQUEUE + 10;
db5ed4df 5244 scsi_change_queue_depth(sdev, qdepth);
c40ecc12 5245
773642d9 5246 if (SDEBUG_OPT_Q_NOISE & sdebug_opts) {
c4837394 5247 sdev_printk(KERN_INFO, sdev, "%s: qdepth=%d, num_in_q=%d\n",
c40ecc12 5248 __func__, qdepth, num_in_q);
cbf67842 5249 }
c4837394 5250 block_unblock_all_queues(false);
cbf67842
DG		 5251 return sdev->queue_depth;
5252}
5253
c4837394 5254static bool fake_timeout(struct scsi_cmnd *scp)
817fd66b 5255{
c4837394 5256 if (0 == (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth))) {
773642d9
DG		 5257 if (sdebug_every_nth < -1)
5258 sdebug_every_nth = -1;
5259 if (SDEBUG_OPT_TIMEOUT & sdebug_opts)
c4837394 5260 return true; /* ignore command causing timeout */
773642d9 5261 else if (SDEBUG_OPT_MAC_TIMEOUT & sdebug_opts &&
817fd66b 5262 scsi_medium_access_command(scp))
c4837394 5263 return true; /* time out reads and writes */
817fd66b 5264 }
c4837394 5265 return false;
817fd66b
DG		 5266}
5267
fd32119b
DG		 5268static int scsi_debug_queuecommand(struct Scsi_Host *shost,
5269 struct scsi_cmnd *scp)
c2248fc9
DG		 5270{
5271 u8 sdeb_i;
5272 struct scsi_device *sdp = scp->device;
5273 const struct opcode_info_t *oip;
5274 const struct opcode_info_t *r_oip;
5275 struct sdebug_dev_info *devip;
5276 u8 *cmd = scp->cmnd;
5277 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
5278 int k, na;
5279 int errsts = 0;
c2248fc9
DG		 5280 u32 flags;
5281 u16 sa;
5282 u8 opcode = cmd[0];
5283 bool has_wlun_rl;
c2248fc9
DG		 5284
5285 scsi_set_resid(scp, 0);
c4837394
DG		 5286 if (sdebug_statistics)
5287 atomic_inc(&sdebug_cmnd_count);
f46eb0e9
DG		 5288 if (unlikely(sdebug_verbose &&
5289 !(SDEBUG_OPT_NO_CDB_NOISE & sdebug_opts))) {
c2248fc9
DG		 5290 char b[120];
5291 int n, len, sb;
5292
5293 len = scp->cmd_len;
5294 sb = (int)sizeof(b);
5295 if (len > 32)
5296 strcpy(b, "too long, over 32 bytes");
5297 else {
5298 for (k = 0, n = 0; k < len && n < sb; ++k)
5299 n += scnprintf(b + n, sb - n, "%02x ",
5300 (u32)cmd[k]);
5301 }
c4837394
DG		 5302 if (sdebug_mq_active)
5303 sdev_printk(KERN_INFO, sdp, "%s: tag=%u, cmd %s\n",
5304 my_name, blk_mq_unique_tag(scp->request),
5305 b);
5306 else
5307 sdev_printk(KERN_INFO, sdp, "%s: cmd %s\n", my_name,
5308 b);
c2248fc9 5309 }
34d55434 5310 has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS);
f46eb0e9
DG		 5311 if (unlikely((sdp->lun >= sdebug_max_luns) && !has_wlun_rl))
5312 goto err_out;
c2248fc9
DG		 5313
5314 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */
5315 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */
5316 devip = (struct sdebug_dev_info *)sdp->hostdata;
f46eb0e9
DG		 5317 if (unlikely(!devip)) {
5318 devip = find_build_dev_info(sdp);
c2248fc9 5319 if (NULL == devip)
f46eb0e9 5320 goto err_out;
c2248fc9
DG		 5321 }
5322 na = oip->num_attached;
5323 r_pfp = oip->pfp;
5324 if (na) { /* multiple commands with this opcode */
5325 r_oip = oip;
5326 if (FF_SA & r_oip->flags) {
5327 if (F_SA_LOW & oip->flags)
5328 sa = 0x1f & cmd[1];
5329 else
5330 sa = get_unaligned_be16(cmd + 8);
5331 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5332 if (opcode == oip->opcode && sa == oip->sa)
5333 break;
5334 }
5335 } else { /* since no service action only check opcode */
5336 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5337 if (opcode == oip->opcode)
5338 break;
5339 }
5340 }
5341 if (k > na) {
5342 if (F_SA_LOW & r_oip->flags)
5343 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4);
5344 else if (F_SA_HIGH & r_oip->flags)
5345 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7);
5346 else
5347 mk_sense_invalid_opcode(scp);
5348 goto check_cond;
5349 }
5350 } /* else (when na==0) we assume the oip is a match */
5351 flags = oip->flags;
f46eb0e9 5352 if (unlikely(F_INV_OP & flags)) {
c2248fc9
DG		 5353 mk_sense_invalid_opcode(scp);
5354 goto check_cond;
5355 }
f46eb0e9 5356 if (unlikely(has_wlun_rl && !(F_RL_WLUN_OK & flags))) {
773642d9
DG		 5357 if (sdebug_verbose)
5358 sdev_printk(KERN_INFO, sdp, "%s: Opcode 0x%x not%s\n",
5359 my_name, opcode, " supported for wlun");
c2248fc9
DG		 5360 mk_sense_invalid_opcode(scp);
5361 goto check_cond;
5362 }
f46eb0e9 5363 if (unlikely(sdebug_strict)) { /* check cdb against mask */
c2248fc9
DG		 5364 u8 rem;
5365 int j;
5366
5367 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) {
5368 rem = ~oip->len_mask[k] & cmd[k];
5369 if (rem) {
5370 for (j = 7; j >= 0; --j, rem <<= 1) {
5371 if (0x80 & rem)
5372 break;
5373 }
5374 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j);
5375 goto check_cond;
5376 }
5377 }
5378 }
f46eb0e9 5379 if (unlikely(!(F_SKIP_UA & flags) &&
b01f6f83
DG		 5380 find_first_bit(devip->uas_bm,
5381 SDEBUG_NUM_UAS) != SDEBUG_NUM_UAS)) {
f46eb0e9 5382 errsts = make_ua(scp, devip);
c2248fc9
DG		 5383 if (errsts)
5384 goto check_cond;
5385 }
c4837394 5386 if (unlikely((F_M_ACCESS & flags) && atomic_read(&devip->stopped))) {
c2248fc9 5387 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2);
773642d9 5388 if (sdebug_verbose)
c2248fc9
DG		 5389 sdev_printk(KERN_INFO, sdp, "%s reports: Not ready: "
5390 "%s\n", my_name, "initializing command "
5391 "required");
5392 errsts = check_condition_result;
5393 goto fini;
5394 }
773642d9 5395 if (sdebug_fake_rw && (F_FAKE_RW & flags))
c2248fc9 5396 goto fini;
f46eb0e9 5397 if (unlikely(sdebug_every_nth)) {
c4837394 5398 if (fake_timeout(scp))
c2248fc9
DG		 5399 return 0; /* ignore command: make trouble */
5400 }
f46eb0e9
DG		 5401 if (likely(oip->pfp))
5402 errsts = oip->pfp(scp, devip); /* calls a resp_* function */
c2248fc9
DG		 5403 else if (r_pfp) /* if leaf function ptr NULL, try the root's */
5404 errsts = r_pfp(scp, devip);
5405
5406fini:
5407 return schedule_resp(scp, devip, errsts,
c2206098 5408 ((F_DELAY_OVERR & flags) ? 0 : sdebug_jdelay));
c2248fc9
DG		 5409check_cond:
5410 return schedule_resp(scp, devip, check_condition_result, 0);
f46eb0e9
DG		 5411err_out:
5412 return schedule_resp(scp, NULL, DID_NO_CONNECT << 16, 0);
c2248fc9
DG		 5413}
5414
9e603ca0 5415static struct scsi_host_template sdebug_driver_template = {
c8ed555a
AV		 5416 .show_info = scsi_debug_show_info,
5417 .write_info = scsi_debug_write_info,
9e603ca0
FT		 5418 .proc_name = sdebug_proc_name,
5419 .name = "SCSI DEBUG",
5420 .info = scsi_debug_info,
5421 .slave_alloc = scsi_debug_slave_alloc,
5422 .slave_configure = scsi_debug_slave_configure,
5423 .slave_destroy = scsi_debug_slave_destroy,
5424 .ioctl = scsi_debug_ioctl,
185dd232 5425 .queuecommand = scsi_debug_queuecommand,
cbf67842 5426 .change_queue_depth = sdebug_change_qdepth,
9e603ca0 5427 .eh_abort_handler = scsi_debug_abort,
9e603ca0 5428 .eh_device_reset_handler = scsi_debug_device_reset,
cbf67842
DG		 5429 .eh_target_reset_handler = scsi_debug_target_reset,
5430 .eh_bus_reset_handler = scsi_debug_bus_reset,
9e603ca0 5431 .eh_host_reset_handler = scsi_debug_host_reset,
c4837394 5432 .can_queue = SDEBUG_CANQUEUE,
9e603ca0 5433 .this_id = 7,
65e8617f 5434 .sg_tablesize = SG_MAX_SEGMENTS,
cbf67842 5435 .cmd_per_lun = DEF_CMD_PER_LUN,
6bb5e6e7 5436 .max_sectors = -1U,
9e603ca0
FT		 5437 .use_clustering = DISABLE_CLUSTERING,
5438 .module = THIS_MODULE,
c40ecc12 5439 .track_queue_depth = 1,
9e603ca0
FT		 5440};
5441
1da177e4
LT		 5442static int sdebug_driver_probe(struct device * dev)
5443{
22017ed2
DG		 5444 int error = 0;
5445 struct sdebug_host_info *sdbg_host;
5446 struct Scsi_Host *hpnt;
f46eb0e9 5447 int hprot;
1da177e4
LT		 5448
5449 sdbg_host = to_sdebug_host(dev);
5450
773642d9
DG		 5451 sdebug_driver_template.can_queue = sdebug_max_queue;
5452 if (sdebug_clustering)
0759c666 5453 sdebug_driver_template.use_clustering = ENABLE_CLUSTERING;
78d4e5a0
DG		 5454 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
5455 if (NULL == hpnt) {
c1287970 5456 pr_err("scsi_host_alloc failed\n");
78d4e5a0 5457 error = -ENODEV;
1da177e4 5458 return error;
78d4e5a0 5459 }
c4837394
DG		 5460 if (submit_queues > nr_cpu_ids) {
5461 pr_warn("%s: trim submit_queues (was %d) to nr_cpu_ids=%d\n",
5462 my_name, submit_queues, nr_cpu_ids);
5463 submit_queues = nr_cpu_ids;
5464 }
5465 /* Decide whether to tell scsi subsystem that we want mq */
5466 /* Following should give the same answer for each host */
5467 sdebug_mq_active = shost_use_blk_mq(hpnt) && (submit_queues > 1);
5468 if (sdebug_mq_active)
5469 hpnt->nr_hw_queues = submit_queues;
1da177e4
LT		 5470
5471 sdbg_host->shost = hpnt;
5472 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
773642d9
DG		 5473 if ((hpnt->this_id >= 0) && (sdebug_num_tgts > hpnt->this_id))
5474 hpnt->max_id = sdebug_num_tgts + 1;
1da177e4 5475 else
773642d9
DG		 5476 hpnt->max_id = sdebug_num_tgts;
5477 /* = sdebug_max_luns; */
f2d3fd29 5478 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
1da177e4 5479
f46eb0e9 5480 hprot = 0;
c6a44287 5481
773642d9 5482 switch (sdebug_dif) {
c6a44287 5483
8475c811 5484 case T10_PI_TYPE1_PROTECTION:
f46eb0e9 5485 hprot = SHOST_DIF_TYPE1_PROTECTION;
773642d9 5486 if (sdebug_dix)
f46eb0e9 5487 hprot |= SHOST_DIX_TYPE1_PROTECTION;
c6a44287
MP		 5488 break;
5489
8475c811 5490 case T10_PI_TYPE2_PROTECTION:
f46eb0e9 5491 hprot = SHOST_DIF_TYPE2_PROTECTION;
773642d9 5492 if (sdebug_dix)
f46eb0e9 5493 hprot |= SHOST_DIX_TYPE2_PROTECTION;
c6a44287
MP		 5494 break;
5495
8475c811 5496 case T10_PI_TYPE3_PROTECTION:
f46eb0e9 5497 hprot = SHOST_DIF_TYPE3_PROTECTION;
773642d9 5498 if (sdebug_dix)
f46eb0e9 5499 hprot |= SHOST_DIX_TYPE3_PROTECTION;
c6a44287
MP		 5500 break;
5501
5502 default:
773642d9 5503 if (sdebug_dix)
f46eb0e9 5504 hprot |= SHOST_DIX_TYPE0_PROTECTION;
c6a44287
MP		 5505 break;
5506 }
5507
f46eb0e9 5508 scsi_host_set_prot(hpnt, hprot);
c6a44287 5509
f46eb0e9
DG		 5510 if (have_dif_prot || sdebug_dix)
5511 pr_info("host protection%s%s%s%s%s%s%s\n",
5512 (hprot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
5513 (hprot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
5514 (hprot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
5515 (hprot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
5516 (hprot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
5517 (hprot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
5518 (hprot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
c6a44287 5519
773642d9 5520 if (sdebug_guard == 1)
c6a44287
MP		 5521 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
5522 else
5523 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
5524
773642d9
DG		 5525 sdebug_verbose = !!(SDEBUG_OPT_NOISE & sdebug_opts);
5526 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & sdebug_opts);
c4837394
DG		 5527 if (sdebug_every_nth) /* need stats counters for every_nth */
5528 sdebug_statistics = true;
1da177e4
LT		 5529 error = scsi_add_host(hpnt, &sdbg_host->dev);
5530 if (error) {
c1287970 5531 pr_err("scsi_add_host failed\n");
1da177e4
LT		 5532 error = -ENODEV;
5533 scsi_host_put(hpnt);
5534 } else
5535 scsi_scan_host(hpnt);
5536
cbf67842 5537 return error;
1da177e4
LT		 5538}
5539
5540static int sdebug_driver_remove(struct device * dev)
5541{
1da177e4 5542 struct sdebug_host_info *sdbg_host;
8b40228f 5543 struct sdebug_dev_info *sdbg_devinfo, *tmp;
1da177e4
LT		 5544
5545 sdbg_host = to_sdebug_host(dev);
5546
5547 if (!sdbg_host) {
c1287970 5548 pr_err("Unable to locate host info\n");
1da177e4
LT		 5549 return -ENODEV;
5550 }
5551
5552 scsi_remove_host(sdbg_host->shost);
5553
8b40228f
FT		 5554 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
5555 dev_list) {
1da177e4
LT		 5556 list_del(&sdbg_devinfo->dev_list);
5557 kfree(sdbg_devinfo);
5558 }
5559
5560 scsi_host_put(sdbg_host->shost);
5561 return 0;
5562}
5563
8dea0d02
FT		 5564static int pseudo_lld_bus_match(struct device *dev,
5565 struct device_driver *dev_driver)
1da177e4 5566{
8dea0d02 5567 return 1;
1da177e4 5568}
8dea0d02
FT		 5569
5570static struct bus_type pseudo_lld_bus = {
5571 .name = "pseudo",
5572 .match = pseudo_lld_bus_match,
5573 .probe = sdebug_driver_probe,
5574 .remove = sdebug_driver_remove,
82069379 5575 .drv_groups = sdebug_drv_groups,
8dea0d02 5576};
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