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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
[linux-2.6-block.git] / drivers / scsi / scsi_debug.c
CommitLineData
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 *
9 * This version is more generic, simulating a variable number of disk
23183910
DG		 10 * (or disk like devices) sharing a common amount of RAM. To be more
11 * realistic, the simulated devices have the transport attributes of
12 * SAS disks.
1da177e4
LT		 13 *
14 *
78d4e5a0 15 * For documentation see http://sg.danny.cz/sg/sdebug26.html
1da177e4
LT		 16 *
17 * D. Gilbert (dpg) work for Magneto-Optical device test [20010421]
18 * dpg: work for devfs large number of disks [20010809]
19 * forked for lk 2.5 series [20011216, 20020101]
20 * use vmalloc() more inquiry+mode_sense [20020302]
21 * add timers for delayed responses [20020721]
22 * Patrick Mansfield <patmans@us.ibm.com> max_luns+scsi_level [20021031]
23 * Mike Anderson <andmike@us.ibm.com> sysfs work [20021118]
24 * dpg: change style of boot options to "scsi_debug.num_tgts=2" and
25 * module options to "modprobe scsi_debug num_tgts=2" [20021221]
26 */
27
c1287970
TW		 28
29#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
30
1da177e4
LT		 31#include <linux/module.h>
32
33#include <linux/kernel.h>
1da177e4
LT		 34#include <linux/errno.h>
35#include <linux/timer.h>
5a0e3ad6 36#include <linux/slab.h>
1da177e4
LT		 37#include <linux/types.h>
38#include <linux/string.h>
39#include <linux/genhd.h>
40#include <linux/fs.h>
41#include <linux/init.h>
42#include <linux/proc_fs.h>
1da177e4
LT		 43#include <linux/vmalloc.h>
44#include <linux/moduleparam.h>
852e034d 45#include <linux/scatterlist.h>
1da177e4 46#include <linux/blkdev.h>
c6a44287 47#include <linux/crc-t10dif.h>
cbf67842
DG		 48#include <linux/spinlock.h>
49#include <linux/interrupt.h>
50#include <linux/atomic.h>
51#include <linux/hrtimer.h>
c6a44287
MP		 52
53#include <net/checksum.h>
9ff26eef 54
44d92694
MP		 55#include <asm/unaligned.h>
56
9ff26eef
FT		 57#include <scsi/scsi.h>
58#include <scsi/scsi_cmnd.h>
59#include <scsi/scsi_device.h>
1da177e4
LT		 60#include <scsi/scsi_host.h>
61#include <scsi/scsicam.h>
a34c4e98 62#include <scsi/scsi_eh.h>
cbf67842 63#include <scsi/scsi_tcq.h>
395cef03 64#include <scsi/scsi_dbg.h>
1da177e4 65
c6a44287 66#include "sd.h"
1da177e4 67#include "scsi_logging.h"
1da177e4 68
22017ed2
DG		 69#define SCSI_DEBUG_VERSION "1.85"
70static const char *scsi_debug_version_date = "20141022";
cbf67842
DG		 71
72#define MY_NAME "scsi_debug"
1da177e4 73
6f3cbf55 74/* Additional Sense Code (ASC) */
c65b1445
DG		 75#define NO_ADDITIONAL_SENSE 0x0
76#define LOGICAL_UNIT_NOT_READY 0x4
c2248fc9 77#define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
1da177e4 78#define UNRECOVERED_READ_ERR 0x11
c65b1445 79#define PARAMETER_LIST_LENGTH_ERR 0x1a
1da177e4 80#define INVALID_OPCODE 0x20
22017ed2 81#define LBA_OUT_OF_RANGE 0x21
1da177e4 82#define INVALID_FIELD_IN_CDB 0x24
c65b1445 83#define INVALID_FIELD_IN_PARAM_LIST 0x26
cbf67842
DG		 84#define UA_RESET_ASC 0x29
85#define UA_CHANGED_ASC 0x2a
19c8ead7
EM		 86#define TARGET_CHANGED_ASC 0x3f
87#define LUNS_CHANGED_ASCQ 0x0e
22017ed2
DG		 88#define INSUFF_RES_ASC 0x55
89#define INSUFF_RES_ASCQ 0x3
cbf67842
DG		 90#define POWER_ON_RESET_ASCQ 0x0
91#define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */
92#define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */
22017ed2 93#define CAPACITY_CHANGED_ASCQ 0x9
1da177e4 94#define SAVING_PARAMS_UNSUP 0x39
6f3cbf55 95#define TRANSPORT_PROBLEM 0x4b
c65b1445
DG		 96#define THRESHOLD_EXCEEDED 0x5d
97#define LOW_POWER_COND_ON 0x5e
22017ed2 98#define MISCOMPARE_VERIFY_ASC 0x1d
acafd0b9
EM		 99#define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */
100#define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16
1da177e4 101
6f3cbf55
DG		 102/* Additional Sense Code Qualifier (ASCQ) */
103#define ACK_NAK_TO 0x3
104
1da177e4
LT		 105
106/* Default values for driver parameters */
107#define DEF_NUM_HOST 1
108#define DEF_NUM_TGTS 1
109#define DEF_MAX_LUNS 1
110/* With these defaults, this driver will make 1 host with 1 target
111 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
112 */
5b94e232 113#define DEF_ATO 1
cbf67842 114#define DEF_DELAY 1 /* if > 0 unit is a jiffy */
1da177e4 115#define DEF_DEV_SIZE_MB 8
5b94e232
MP		 116#define DEF_DIF 0
117#define DEF_DIX 0
1da177e4 118#define DEF_D_SENSE 0
5b94e232 119#define DEF_EVERY_NTH 0
23183910 120#define DEF_FAKE_RW 0
c6a44287 121#define DEF_GUARD 0
cbf67842 122#define DEF_HOST_LOCK 0
5b94e232
MP		 123#define DEF_LBPU 0
124#define DEF_LBPWS 0
125#define DEF_LBPWS10 0
be1dd78d 126#define DEF_LBPRZ 1
ea61fca5 127#define DEF_LOWEST_ALIGNED 0
cbf67842 128#define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */
5b94e232
MP		 129#define DEF_NO_LUN_0 0
130#define DEF_NUM_PARTS 0
131#define DEF_OPTS 0
32c5844a 132#define DEF_OPT_BLKS 1024
5b94e232
MP		 133#define DEF_PHYSBLK_EXP 0
134#define DEF_PTYPE 0
d986788b 135#define DEF_REMOVABLE false
e46b0344 136#define DEF_SCSI_LEVEL 6 /* INQUIRY, byte2 [6->SPC-4] */
5b94e232
MP		 137#define DEF_SECTOR_SIZE 512
138#define DEF_UNMAP_ALIGNMENT 0
139#define DEF_UNMAP_GRANULARITY 1
6014759c
MP		 140#define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
141#define DEF_UNMAP_MAX_DESC 256
5b94e232
MP		 142#define DEF_VIRTUAL_GB 0
143#define DEF_VPD_USE_HOSTNO 1
144#define DEF_WRITESAME_LENGTH 0xFFFF
c2248fc9 145#define DEF_STRICT 0
cbf67842 146#define DELAY_OVERRIDDEN -9999
1da177e4
LT		 147
148/* bit mask values for scsi_debug_opts */
149#define SCSI_DEBUG_OPT_NOISE 1
150#define SCSI_DEBUG_OPT_MEDIUM_ERR 2
151#define SCSI_DEBUG_OPT_TIMEOUT 4
152#define SCSI_DEBUG_OPT_RECOVERED_ERR 8
6f3cbf55 153#define SCSI_DEBUG_OPT_TRANSPORT_ERR 16
c6a44287
MP		 154#define SCSI_DEBUG_OPT_DIF_ERR 32
155#define SCSI_DEBUG_OPT_DIX_ERR 64
18a4d0a2 156#define SCSI_DEBUG_OPT_MAC_TIMEOUT 128
cbf67842
DG		 157#define SCSI_DEBUG_OPT_SHORT_TRANSFER 0x100
158#define SCSI_DEBUG_OPT_Q_NOISE 0x200
159#define SCSI_DEBUG_OPT_ALL_TSF 0x400
160#define SCSI_DEBUG_OPT_RARE_TSF 0x800
161#define SCSI_DEBUG_OPT_N_WCE 0x1000
162#define SCSI_DEBUG_OPT_RESET_NOISE 0x2000
163#define SCSI_DEBUG_OPT_NO_CDB_NOISE 0x4000
164#define SCSI_DEBUG_OPT_ALL_NOISE (0x1 | 0x200 | 0x2000)
1da177e4
LT		 165/* When "every_nth" > 0 then modulo "every_nth" commands:
166 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
167 * - a RECOVERED_ERROR is simulated on successful read and write
168 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
6f3cbf55
DG		 169 * - a TRANSPORT_ERROR is simulated on successful read and write
170 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
1da177e4
LT		 171 *
172 * When "every_nth" < 0 then after "- every_nth" commands:
173 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
174 * - a RECOVERED_ERROR is simulated on successful read and write
175 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
6f3cbf55
DG		 176 * - a TRANSPORT_ERROR is simulated on successful read and write
177 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
1da177e4
LT		 178 * This will continue until some other action occurs (e.g. the user
179 * writing a new value (other than -1 or 1) to every_nth via sysfs).
180 */
181
cbf67842
DG		 182/* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs)are returned in
183 * priority order. In the subset implemented here lower numbers have higher
184 * priority. The UA numbers should be a sequence starting from 0 with
185 * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */
186#define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */
187#define SDEBUG_UA_BUS_RESET 1
188#define SDEBUG_UA_MODE_CHANGED 2
0d01c5df 189#define SDEBUG_UA_CAPACITY_CHANGED 3
19c8ead7 190#define SDEBUG_UA_LUNS_CHANGED 4
acafd0b9
EM		 191#define SDEBUG_UA_MICROCODE_CHANGED 5 /* simulate firmware change */
192#define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 6
193#define SDEBUG_NUM_UAS 7
cbf67842
DG		 194
195/* for check_readiness() */
c2248fc9
DG		 196#define UAS_ONLY 1 /* check for UAs only */
197#define UAS_TUR 0 /* if no UAs then check if media access possible */
cbf67842 198
1da177e4
LT		 199/* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
200 * sector on read commands: */
201#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
32f7ef73 202#define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
1da177e4
LT		 203
204/* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
205 * or "peripheral device" addressing (value 0) */
206#define SAM2_LUN_ADDRESS_METHOD 0
207
cbf67842
DG		 208/* SCSI_DEBUG_CANQUEUE is the maximum number of commands that can be queued
209 * (for response) at one time. Can be reduced by max_queue option. Command
210 * responses are not queued when delay=0 and ndelay=0. The per-device
211 * DEF_CMD_PER_LUN can be changed via sysfs:
212 * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth but cannot exceed
213 * SCSI_DEBUG_CANQUEUE. */
214#define SCSI_DEBUG_CANQUEUE_WORDS 9 /* a WORD is bits in a long */
215#define SCSI_DEBUG_CANQUEUE (SCSI_DEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
216#define DEF_CMD_PER_LUN 255
217
218#if DEF_CMD_PER_LUN > SCSI_DEBUG_CANQUEUE
219#warning "Expect DEF_CMD_PER_LUN <= SCSI_DEBUG_CANQUEUE"
220#endif
78d4e5a0 221
c2248fc9
DG		 222/* SCSI opcodes (first byte of cdb) mapped onto these indexes */
223enum sdeb_opcode_index {
224 SDEB_I_INVALID_OPCODE = 0,
225 SDEB_I_INQUIRY = 1,
226 SDEB_I_REPORT_LUNS = 2,
227 SDEB_I_REQUEST_SENSE = 3,
228 SDEB_I_TEST_UNIT_READY = 4,
229 SDEB_I_MODE_SENSE = 5, /* 6, 10 */
230 SDEB_I_MODE_SELECT = 6, /* 6, 10 */
231 SDEB_I_LOG_SENSE = 7,
232 SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */
233 SDEB_I_READ = 9, /* 6, 10, 12, 16 */
234 SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */
235 SDEB_I_START_STOP = 11,
236 SDEB_I_SERV_ACT_IN = 12, /* 12, 16 */
237 SDEB_I_SERV_ACT_OUT = 13, /* 12, 16 */
238 SDEB_I_MAINT_IN = 14,
239 SDEB_I_MAINT_OUT = 15,
240 SDEB_I_VERIFY = 16, /* 10 only */
241 SDEB_I_VARIABLE_LEN = 17,
242 SDEB_I_RESERVE = 18, /* 6, 10 */
243 SDEB_I_RELEASE = 19, /* 6, 10 */
244 SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
245 SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */
246 SDEB_I_ATA_PT = 22, /* 12, 16 */
247 SDEB_I_SEND_DIAG = 23,
248 SDEB_I_UNMAP = 24,
249 SDEB_I_XDWRITEREAD = 25, /* 10 only */
250 SDEB_I_WRITE_BUFFER = 26,
251 SDEB_I_WRITE_SAME = 27, /* 10, 16 */
252 SDEB_I_SYNC_CACHE = 28, /* 10 only */
253 SDEB_I_COMP_WRITE = 29,
254 SDEB_I_LAST_ELEMENT = 30, /* keep this last */
255};
256
257static const unsigned char opcode_ind_arr[256] = {
258/* 0x0; 0x0->0x1f: 6 byte cdbs */
259 SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE,
260 0, 0, 0, 0,
261 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0,
262 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
263 SDEB_I_RELEASE,
264 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG,
265 SDEB_I_ALLOW_REMOVAL, 0,
266/* 0x20; 0x20->0x3f: 10 byte cdbs */
267 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0,
268 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY,
269 0, 0, 0, 0, 0, SDEB_I_SYNC_CACHE, 0, 0,
270 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0,
271/* 0x40; 0x40->0x5f: 10 byte cdbs */
272 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0,
273 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0,
274 0, 0, 0, SDEB_I_XDWRITEREAD, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
275 SDEB_I_RELEASE,
276 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0,
277/* 0x60; 0x60->0x7d are reserved */
278 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
279 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
280 0, SDEB_I_VARIABLE_LEN,
281/* 0x80; 0x80->0x9f: 16 byte cdbs */
282 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0,
283 SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0, 0, 0, 0, 0,
284 0, 0, 0, SDEB_I_WRITE_SAME, 0, 0, 0, 0,
285 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN, SDEB_I_SERV_ACT_OUT,
286/* 0xa0; 0xa0->0xbf: 12 byte cdbs */
287 SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN,
288 SDEB_I_MAINT_OUT, 0, 0, 0,
289 SDEB_I_READ, SDEB_I_SERV_ACT_OUT, SDEB_I_WRITE, SDEB_I_SERV_ACT_IN,
290 0, 0, 0, 0,
291 0, 0, 0, 0, 0, 0, 0, 0,
292 0, 0, 0, 0, 0, 0, 0, 0,
293/* 0xc0; 0xc0->0xff: vendor specific */
294 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
295 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
296 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
297 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
298};
299
300#define F_D_IN 1
301#define F_D_OUT 2
302#define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */
303#define F_D_UNKN 8
304#define F_RL_WLUN_OK 0x10
305#define F_SKIP_UA 0x20
306#define F_DELAY_OVERR 0x40
307#define F_SA_LOW 0x80 /* cdb byte 1, bits 4 to 0 */
308#define F_SA_HIGH 0x100 /* as used by variable length cdbs */
309#define F_INV_OP 0x200
310#define F_FAKE_RW 0x400
311#define F_M_ACCESS 0x800 /* media access */
312
313#define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR)
314#define FF_DIRECT_IO (F_M_ACCESS | F_FAKE_RW)
315#define FF_SA (F_SA_HIGH | F_SA_LOW)
316
317struct sdebug_dev_info;
c2248fc9
DG		 318static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *);
319static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *);
320static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *);
321static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
322static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *);
323static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
324static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
325static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
326static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
327static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
328static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
329static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
330static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *);
331static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *);
38d5c833
DG		 332static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *);
333static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *);
c2248fc9
DG		 334static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *);
335static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *);
336static int resp_xdwriteread_10(struct scsi_cmnd *, struct sdebug_dev_info *);
38d5c833 337static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
acafd0b9 338static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *);
c2248fc9
DG		 339
340struct opcode_info_t {
341 u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff
342 * for terminating element */
343 u8 opcode; /* if num_attached > 0, preferred */
344 u16 sa; /* service action */
345 u32 flags; /* OR-ed set of SDEB_F_* */
346 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
347 const struct opcode_info_t *arrp; /* num_attached elements or NULL */
348 u8 len_mask[16]; /* len=len_mask[0], then mask for cdb[1]... */
349 /* ignore cdb bytes after position 15 */
350};
351
352static const struct opcode_info_t msense_iarr[1] = {
353 {0, 0x1a, 0, F_D_IN, NULL, NULL,
354 {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
355};
356
357static const struct opcode_info_t mselect_iarr[1] = {
358 {0, 0x15, 0, F_D_OUT, NULL, NULL,
359 {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
360};
361
362static const struct opcode_info_t read_iarr[3] = {
363 {0, 0x28, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL,/* READ(10) */
364 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
365 0, 0, 0, 0} },
366 {0, 0x8, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL, /* READ(6) */
367 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
368 {0, 0xa8, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL,/* READ(12) */
369 {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x9f,
370 0xc7, 0, 0, 0, 0} },
371};
372
373static const struct opcode_info_t write_iarr[3] = {
374 {0, 0x2a, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 10 */
375 {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
376 0, 0, 0, 0} },
377 {0, 0xa, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 6 */
378 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
379 {0, 0xaa, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 12 */
380 {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x9f,
381 0xc7, 0, 0, 0, 0} },
382};
383
384static const struct opcode_info_t sa_in_iarr[1] = {
385 {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL,
386 {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
387 0xff, 0xff, 0xff, 0, 0xc7} },
388};
389
390static const struct opcode_info_t vl_iarr[1] = { /* VARIABLE LENGTH */
391 {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_DIRECT_IO, resp_write_dt0,
392 NULL, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0xb, 0xfa,
393 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
394};
395
396static const struct opcode_info_t maint_in_iarr[2] = {
38d5c833 397 {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL,
c2248fc9
DG		 398 {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
399 0xc7, 0, 0, 0, 0} },
38d5c833 400 {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL,
c2248fc9
DG		 401 {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
402 0, 0} },
403};
404
405static const struct opcode_info_t write_same_iarr[1] = {
406 {0, 0x93, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, resp_write_same_16, NULL,
407 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
408 0xff, 0xff, 0xff, 0x1f, 0xc7} },
409};
410
411static const struct opcode_info_t reserve_iarr[1] = {
412 {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */
413 {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
414};
415
416static const struct opcode_info_t release_iarr[1] = {
417 {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */
418 {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
419};
420
421
422/* This array is accessed via SDEB_I_* values. Make sure all are mapped,
423 * plus the terminating elements for logic that scans this table such as
424 * REPORT SUPPORTED OPERATION CODES. */
425static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEMENT + 1] = {
426/* 0 */
427 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL,
428 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
429 {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL,
430 {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
431 {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL,
432 {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
433 0, 0} },
434 {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL,
435 {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
436 {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */
437 {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
438 {1, 0x5a, 0, F_D_IN, resp_mode_sense, msense_iarr,
439 {10, 0xf8, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
440 0} },
441 {1, 0x55, 0, F_D_OUT, resp_mode_select, mselect_iarr,
442 {10, 0xf1, 0, 0, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
443 {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL,
444 {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0,
445 0, 0, 0} },
446 {0, 0x25, 0, F_D_IN, resp_readcap, NULL,
447 {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0,
448 0, 0} },
449 {3, 0x88, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, read_iarr,
450 {16, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
451 0xff, 0xff, 0xff, 0x9f, 0xc7} }, /* READ(16) */
452/* 10 */
453 {3, 0x8a, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, write_iarr,
454 {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
455 0xff, 0xff, 0xff, 0x9f, 0xc7} }, /* WRITE(16) */
456 {0, 0x1b, 0, 0, resp_start_stop, NULL, /* START STOP UNIT */
457 {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
458 {1, 0x9e, 0x10, F_SA_LOW | F_D_IN, resp_readcap16, sa_in_iarr,
459 {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
460 0xff, 0xff, 0xff, 0x1, 0xc7} }, /* READ CAPACITY(16) */
461 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* SA OUT */
462 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
463 {2, 0xa3, 0xa, F_SA_LOW | F_D_IN, resp_report_tgtpgs, maint_in_iarr,
464 {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, 0,
465 0} },
466 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */
467 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
f7f9f26b
DG		 468 {0, 0x2f, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, NULL, NULL, /* VERIFY(10) */
469 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7,
470 0, 0, 0, 0, 0, 0} },
c2248fc9
DG		 471 {1, 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_DIRECT_IO, resp_read_dt0,
472 vl_iarr, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0x9, 0xfe, 0,
473 0xff, 0xff, 0xff, 0xff} },/* VARIABLE LENGTH, READ(32) */
474 {1, 0x56, 0, F_D_OUT, NULL, reserve_iarr, /* RESERVE(10) */
475 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
476 0} },
477 {1, 0x57, 0, F_D_OUT, NULL, release_iarr, /* RELEASE(10) */
478 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
479 0} },
480/* 20 */
f7f9f26b
DG		 481 {0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */
482 {6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
c2248fc9
DG		 483 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */
484 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
485 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */
486 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
487 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */
488 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
489 {0, 0x42, 0, F_D_OUT | FF_DIRECT_IO, resp_unmap, NULL, /* UNMAP */
490 {10, 0x1, 0, 0, 0, 0, 0x1f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
491 {0, 0x53, 0, F_D_IN | F_D_OUT | FF_DIRECT_IO, resp_xdwriteread_10,
492 NULL, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7,
493 0, 0, 0, 0, 0, 0} },
acafd0b9
EM		 494 {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL,
495 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0,
496 0, 0, 0, 0} }, /* WRITE_BUFFER */
c2248fc9
DG		 497 {1, 0x41, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, resp_write_same_10,
498 write_same_iarr, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff,
499 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
500 {0, 0x35, 0, F_DELAY_OVERR | FF_DIRECT_IO, NULL, NULL, /* SYNC_CACHE */
501 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
502 0, 0, 0, 0} },
38d5c833 503 {0, 0x89, 0, F_D_OUT | FF_DIRECT_IO, resp_comp_write, NULL,
c2248fc9
DG		 504 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
505 0, 0xff, 0x1f, 0xc7} }, /* COMPARE AND WRITE */
506
507/* 30 */
508 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */
509 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
510};
511
817fd66b
DG		 512struct sdebug_scmd_extra_t {
513 bool inj_recovered;
514 bool inj_transport;
515 bool inj_dif;
516 bool inj_dix;
517 bool inj_short;
518};
519
1da177e4 520static int scsi_debug_add_host = DEF_NUM_HOST;
5b94e232 521static int scsi_debug_ato = DEF_ATO;
1da177e4
LT		 522static int scsi_debug_delay = DEF_DELAY;
523static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB;
5b94e232
MP		 524static int scsi_debug_dif = DEF_DIF;
525static int scsi_debug_dix = DEF_DIX;
526static int scsi_debug_dsense = DEF_D_SENSE;
1da177e4 527static int scsi_debug_every_nth = DEF_EVERY_NTH;
5b94e232 528static int scsi_debug_fake_rw = DEF_FAKE_RW;
68aee7ba 529static unsigned int scsi_debug_guard = DEF_GUARD;
5b94e232 530static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED;
1da177e4 531static int scsi_debug_max_luns = DEF_MAX_LUNS;
78d4e5a0 532static int scsi_debug_max_queue = SCSI_DEBUG_CANQUEUE;
cbf67842
DG		 533static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */
534static int scsi_debug_ndelay = DEF_NDELAY;
5b94e232 535static int scsi_debug_no_lun_0 = DEF_NO_LUN_0;
78d4e5a0 536static int scsi_debug_no_uld = 0;
5b94e232 537static int scsi_debug_num_parts = DEF_NUM_PARTS;
1da177e4 538static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */
5b94e232 539static int scsi_debug_opt_blks = DEF_OPT_BLKS;
1da177e4 540static int scsi_debug_opts = DEF_OPTS;
5b94e232 541static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP;
1da177e4 542static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */
5b94e232
MP		 543static int scsi_debug_scsi_level = DEF_SCSI_LEVEL;
544static int scsi_debug_sector_size = DEF_SECTOR_SIZE;
c65b1445 545static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB;
23183910 546static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
5b94e232
MP		 547static unsigned int scsi_debug_lbpu = DEF_LBPU;
548static unsigned int scsi_debug_lbpws = DEF_LBPWS;
549static unsigned int scsi_debug_lbpws10 = DEF_LBPWS10;
be1dd78d 550static unsigned int scsi_debug_lbprz = DEF_LBPRZ;
6014759c 551static unsigned int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
5b94e232
MP		 552static unsigned int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY;
553static unsigned int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
554static unsigned int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
555static unsigned int scsi_debug_write_same_length = DEF_WRITESAME_LENGTH;
d986788b 556static bool scsi_debug_removable = DEF_REMOVABLE;
0759c666 557static bool scsi_debug_clustering;
cbf67842 558static bool scsi_debug_host_lock = DEF_HOST_LOCK;
c2248fc9 559static bool scsi_debug_strict = DEF_STRICT;
817fd66b 560static bool sdebug_any_injecting_opt;
1da177e4 561
cbf67842
DG		 562static atomic_t sdebug_cmnd_count;
563static atomic_t sdebug_completions;
564static atomic_t sdebug_a_tsf; /* counter of 'almost' TSFs */
1da177e4
LT		 565
566#define DEV_READONLY(TGT) (0)
1da177e4 567
c65b1445 568static unsigned int sdebug_store_sectors;
1da177e4
LT		 569static sector_t sdebug_capacity; /* in sectors */
570
571/* old BIOS stuff, kernel may get rid of them but some mode sense pages
572 may still need them */
573static int sdebug_heads; /* heads per disk */
574static int sdebug_cylinders_per; /* cylinders per surface */
575static int sdebug_sectors_per; /* sectors per cylinder */
576
1da177e4
LT		 577#define SDEBUG_MAX_PARTS 4
578
395cef03 579#define SCSI_DEBUG_MAX_CMD_LEN 32
9e603ca0 580
5b94e232
MP		 581static unsigned int scsi_debug_lbp(void)
582{
cbf67842
DG		 583 return ((0 == scsi_debug_fake_rw) &&
584 (scsi_debug_lbpu | scsi_debug_lbpws | scsi_debug_lbpws10));
5b94e232
MP		 585}
586
1da177e4
LT		 587struct sdebug_dev_info {
588 struct list_head dev_list;
1da177e4
LT		 589 unsigned int channel;
590 unsigned int target;
9cb78c16 591 u64 lun;
1da177e4 592 struct sdebug_host_info *sdbg_host;
cbf67842
DG		 593 unsigned long uas_bm[1];
594 atomic_t num_in_q;
c2248fc9
DG		 595 char stopped; /* TODO: should be atomic */
596 bool used;
1da177e4
LT		 597};
598
599struct sdebug_host_info {
600 struct list_head host_list;
601 struct Scsi_Host *shost;
602 struct device dev;
603 struct list_head dev_info_list;
604};
605
606#define to_sdebug_host(d) \
607 container_of(d, struct sdebug_host_info, dev)
608
609static LIST_HEAD(sdebug_host_list);
610static DEFINE_SPINLOCK(sdebug_host_list_lock);
611
cbf67842
DG		 612
613struct sdebug_hrtimer { /* ... is derived from hrtimer */
614 struct hrtimer hrt; /* must be first element */
615 int qa_indx;
616};
1da177e4
LT		 617
618struct sdebug_queued_cmd {
cbf67842
DG		 619 /* in_use flagged by a bit in queued_in_use_bm[] */
620 struct timer_list *cmnd_timerp;
621 struct tasklet_struct *tletp;
622 struct sdebug_hrtimer *sd_hrtp;
1da177e4 623 struct scsi_cmnd * a_cmnd;
1da177e4
LT		 624};
625static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
cbf67842
DG		 626static unsigned long queued_in_use_bm[SCSI_DEBUG_CANQUEUE_WORDS];
627
1da177e4 628
1da177e4 629static unsigned char * fake_storep; /* ramdisk storage */
e18d8bea 630static struct sd_dif_tuple *dif_storep; /* protection info */
44d92694 631static void *map_storep; /* provisioning map */
1da177e4 632
44d92694 633static unsigned long map_size;
cbf67842
DG		 634static int num_aborts;
635static int num_dev_resets;
636static int num_target_resets;
637static int num_bus_resets;
638static int num_host_resets;
c6a44287
MP		 639static int dix_writes;
640static int dix_reads;
641static int dif_errors;
1da177e4
LT		 642
643static DEFINE_SPINLOCK(queued_arr_lock);
644static DEFINE_RWLOCK(atomic_rw);
645
cbf67842
DG		 646static char sdebug_proc_name[] = MY_NAME;
647static const char *my_name = MY_NAME;
1da177e4 648
1da177e4
LT		 649static struct bus_type pseudo_lld_bus;
650
651static struct device_driver sdebug_driverfs_driver = {
652 .name = sdebug_proc_name,
653 .bus = &pseudo_lld_bus,
1da177e4
LT		 654};
655
656static const int check_condition_result =
657 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
658
c6a44287
MP		 659static const int illegal_condition_result =
660 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
661
cbf67842
DG		 662static const int device_qfull_result =
663 (DID_OK << 16) | (COMMAND_COMPLETE << 8) | SAM_STAT_TASK_SET_FULL;
664
665static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
666 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
667 0, 0, 0, 0};
c65b1445
DG		 668static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
669 0, 0, 0x2, 0x4b};
670static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
671 0, 0, 0x0, 0x0};
672
14faa944
AM		 673static void *fake_store(unsigned long long lba)
674{
675 lba = do_div(lba, sdebug_store_sectors);
676
677 return fake_storep + lba * scsi_debug_sector_size;
678}
679
680static struct sd_dif_tuple *dif_store(sector_t sector)
681{
49413112 682 sector = sector_div(sector, sdebug_store_sectors);
14faa944
AM		 683
684 return dif_storep + sector;
685}
686
1da177e4
LT		 687static int sdebug_add_adapter(void);
688static void sdebug_remove_adapter(void);
1da177e4 689
8dea0d02
FT		 690static void sdebug_max_tgts_luns(void)
691{
692 struct sdebug_host_info *sdbg_host;
693 struct Scsi_Host *hpnt;
694
695 spin_lock(&sdebug_host_list_lock);
696 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
697 hpnt = sdbg_host->shost;
698 if ((hpnt->this_id >= 0) &&
699 (scsi_debug_num_tgts > hpnt->this_id))
700 hpnt->max_id = scsi_debug_num_tgts + 1;
701 else
702 hpnt->max_id = scsi_debug_num_tgts;
703 /* scsi_debug_max_luns; */
f2d3fd29 704 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
8dea0d02
FT		 705 }
706 spin_unlock(&sdebug_host_list_lock);
707}
708
22017ed2
DG		 709enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
710
711/* Set in_bit to -1 to indicate no bit position of invalid field */
712static void
713mk_sense_invalid_fld(struct scsi_cmnd *scp, enum sdeb_cmd_data c_d,
714 int in_byte, int in_bit)
715{
716 unsigned char *sbuff;
717 u8 sks[4];
718 int sl, asc;
719
720 sbuff = scp->sense_buffer;
721 if (!sbuff) {
722 sdev_printk(KERN_ERR, scp->device,
723 "%s: sense_buffer is NULL\n", __func__);
724 return;
725 }
726 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
727 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
728 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, ILLEGAL_REQUEST,
729 asc, 0);
730 memset(sks, 0, sizeof(sks));
731 sks[0] = 0x80;
732 if (c_d)
733 sks[0] |= 0x40;
734 if (in_bit >= 0) {
735 sks[0] |= 0x8;
736 sks[0] |= 0x7 & in_bit;
737 }
738 put_unaligned_be16(in_byte, sks + 1);
739 if (scsi_debug_dsense) {
740 sl = sbuff[7] + 8;
741 sbuff[7] = sl;
742 sbuff[sl] = 0x2;
743 sbuff[sl + 1] = 0x6;
744 memcpy(sbuff + sl + 4, sks, 3);
745 } else
746 memcpy(sbuff + 15, sks, 3);
747 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
748 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
749 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
750 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
751}
752
cbf67842 753static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
8dea0d02
FT		 754{
755 unsigned char *sbuff;
756
cbf67842
DG		 757 sbuff = scp->sense_buffer;
758 if (!sbuff) {
759 sdev_printk(KERN_ERR, scp->device,
760 "%s: sense_buffer is NULL\n", __func__);
761 return;
762 }
763 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
8dea0d02
FT		 764
765 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, key, asc, asq);
766
767 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
cbf67842
DG		 768 sdev_printk(KERN_INFO, scp->device,
769 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
770 my_name, key, asc, asq);
8dea0d02 771}
1da177e4 772
22017ed2
DG		 773static void
774mk_sense_invalid_opcode(struct scsi_cmnd *scp)
775{
776 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
777}
778
1da177e4
LT		 779static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
780{
781 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
cbf67842
DG		 782 if (0x1261 == cmd)
783 sdev_printk(KERN_INFO, dev,
784 "%s: BLKFLSBUF [0x1261]\n", __func__);
785 else if (0x5331 == cmd)
786 sdev_printk(KERN_INFO, dev,
787 "%s: CDROM_GET_CAPABILITY [0x5331]\n",
788 __func__);
789 else
790 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
791 __func__, cmd);
1da177e4
LT		 792 }
793 return -EINVAL;
794 /* return -ENOTTY; // correct return but upsets fdisk */
795}
796
19c8ead7
EM		 797static void clear_luns_changed_on_target(struct sdebug_dev_info *devip)
798{
799 struct sdebug_host_info *sdhp;
800 struct sdebug_dev_info *dp;
801
802 spin_lock(&sdebug_host_list_lock);
803 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
804 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
805 if ((devip->sdbg_host == dp->sdbg_host) &&
806 (devip->target == dp->target))
807 clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
808 }
809 }
810 spin_unlock(&sdebug_host_list_lock);
811}
812
cbf67842 813static int check_readiness(struct scsi_cmnd *SCpnt, int uas_only,
c65b1445 814 struct sdebug_dev_info * devip)
1da177e4 815{
cbf67842
DG		 816 int k;
817 bool debug = !!(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts);
818
819 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
820 if (k != SDEBUG_NUM_UAS) {
821 const char *cp = NULL;
822
823 switch (k) {
824 case SDEBUG_UA_POR:
825 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
826 UA_RESET_ASC, POWER_ON_RESET_ASCQ);
827 if (debug)
828 cp = "power on reset";
829 break;
830 case SDEBUG_UA_BUS_RESET:
831 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
832 UA_RESET_ASC, BUS_RESET_ASCQ);
833 if (debug)
834 cp = "bus reset";
835 break;
836 case SDEBUG_UA_MODE_CHANGED:
837 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
838 UA_CHANGED_ASC, MODE_CHANGED_ASCQ);
839 if (debug)
840 cp = "mode parameters changed";
841 break;
0d01c5df
DG		 842 case SDEBUG_UA_CAPACITY_CHANGED:
843 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
844 UA_CHANGED_ASC, CAPACITY_CHANGED_ASCQ);
845 if (debug)
846 cp = "capacity data changed";
f49accf1 847 break;
acafd0b9
EM		 848 case SDEBUG_UA_MICROCODE_CHANGED:
849 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
850 TARGET_CHANGED_ASC, MICROCODE_CHANGED_ASCQ);
851 if (debug)
852 cp = "microcode has been changed";
853 break;
854 case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET:
855 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
856 TARGET_CHANGED_ASC,
857 MICROCODE_CHANGED_WO_RESET_ASCQ);
858 if (debug)
859 cp = "microcode has been changed without reset";
860 break;
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.
867 * NOTE: scsi_debug_scsi_level does not use the same
868 * values as struct scsi_device->scsi_level.
869 */
870 if (scsi_debug_scsi_level >= 6) /* SPC-4 and above */
871 clear_luns_changed_on_target(devip);
872 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
873 TARGET_CHANGED_ASC,
874 LUNS_CHANGED_ASCQ);
875 if (debug)
876 cp = "reported luns data has changed";
877 break;
cbf67842
DG		 878 default:
879 pr_warn("%s: unexpected unit attention code=%d\n",
880 __func__, k);
881 if (debug)
882 cp = "unknown";
883 break;
884 }
885 clear_bit(k, devip->uas_bm);
886 if (debug)
887 sdev_printk(KERN_INFO, SCpnt->device,
888 "%s reports: Unit attention: %s\n",
889 my_name, cp);
1da177e4
LT		 890 return check_condition_result;
891 }
cbf67842
DG		 892 if ((UAS_TUR == uas_only) && devip->stopped) {
893 mk_sense_buffer(SCpnt, NOT_READY, LOGICAL_UNIT_NOT_READY,
c65b1445 894 0x2);
cbf67842
DG		 895 if (debug)
896 sdev_printk(KERN_INFO, SCpnt->device,
897 "%s reports: Not ready: %s\n", my_name,
898 "initializing command required");
c65b1445
DG		 899 return check_condition_result;
900 }
1da177e4
LT		 901 return 0;
902}
903
904/* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */
21a61829 905static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1da177e4
LT		 906 int arr_len)
907{
21a61829 908 int act_len;
072d0bb3 909 struct scsi_data_buffer *sdb = scsi_in(scp);
1da177e4 910
072d0bb3 911 if (!sdb->length)
1da177e4 912 return 0;
072d0bb3 913 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
1da177e4 914 return (DID_ERROR << 16);
21a61829
FT		 915
916 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
917 arr, arr_len);
a4517511 918 sdb->resid = scsi_bufflen(scp) - act_len;
21a61829 919
1da177e4
LT		 920 return 0;
921}
922
923/* Returns number of bytes fetched into 'arr' or -1 if error. */
21a61829
FT		 924static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
925 int arr_len)
1da177e4 926{
21a61829 927 if (!scsi_bufflen(scp))
1da177e4 928 return 0;
072d0bb3 929 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE))
1da177e4 930 return -1;
21a61829
FT		 931
932 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
1da177e4
LT		 933}
934
935
936static const char * inq_vendor_id = "Linux ";
937static const char * inq_product_id = "scsi_debug ";
cbf67842 938static const char *inq_product_rev = "0184"; /* version less '.' */
1da177e4 939
cbf67842 940/* Device identification VPD page. Returns number of bytes placed in arr */
5a09e398
HR		 941static int inquiry_evpd_83(unsigned char * arr, int port_group_id,
942 int target_dev_id, int dev_id_num,
943 const char * dev_id_str,
c65b1445 944 int dev_id_str_len)
1da177e4 945{
c65b1445
DG		 946 int num, port_a;
947 char b[32];
1da177e4 948
c65b1445 949 port_a = target_dev_id + 1;
1da177e4
LT		 950 /* T10 vendor identifier field format (faked) */
951 arr[0] = 0x2; /* ASCII */
952 arr[1] = 0x1;
953 arr[2] = 0x0;
954 memcpy(&arr[4], inq_vendor_id, 8);
955 memcpy(&arr[12], inq_product_id, 16);
956 memcpy(&arr[28], dev_id_str, dev_id_str_len);
957 num = 8 + 16 + dev_id_str_len;
958 arr[3] = num;
959 num += 4;
c65b1445
DG		 960 if (dev_id_num >= 0) {
961 /* NAA-5, Logical unit identifier (binary) */
962 arr[num++] = 0x1; /* binary (not necessarily sas) */
963 arr[num++] = 0x3; /* PIV=0, lu, naa */
964 arr[num++] = 0x0;
965 arr[num++] = 0x8;
966 arr[num++] = 0x53; /* naa-5 ieee company id=0x333333 (fake) */
967 arr[num++] = 0x33;
968 arr[num++] = 0x33;
969 arr[num++] = 0x30;
970 arr[num++] = (dev_id_num >> 24);
971 arr[num++] = (dev_id_num >> 16) & 0xff;
972 arr[num++] = (dev_id_num >> 8) & 0xff;
973 arr[num++] = dev_id_num & 0xff;
974 /* Target relative port number */
975 arr[num++] = 0x61; /* proto=sas, binary */
976 arr[num++] = 0x94; /* PIV=1, target port, rel port */
977 arr[num++] = 0x0; /* reserved */
978 arr[num++] = 0x4; /* length */
979 arr[num++] = 0x0; /* reserved */
980 arr[num++] = 0x0; /* reserved */
981 arr[num++] = 0x0;
982 arr[num++] = 0x1; /* relative port A */
983 }
984 /* NAA-5, Target port identifier */
985 arr[num++] = 0x61; /* proto=sas, binary */
986 arr[num++] = 0x93; /* piv=1, target port, naa */
987 arr[num++] = 0x0;
988 arr[num++] = 0x8;
989 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
990 arr[num++] = 0x22;
991 arr[num++] = 0x22;
992 arr[num++] = 0x20;
993 arr[num++] = (port_a >> 24);
994 arr[num++] = (port_a >> 16) & 0xff;
995 arr[num++] = (port_a >> 8) & 0xff;
996 arr[num++] = port_a & 0xff;
5a09e398
HR		 997 /* NAA-5, Target port group identifier */
998 arr[num++] = 0x61; /* proto=sas, binary */
999 arr[num++] = 0x95; /* piv=1, target port group id */
1000 arr[num++] = 0x0;
1001 arr[num++] = 0x4;
1002 arr[num++] = 0;
1003 arr[num++] = 0;
1004 arr[num++] = (port_group_id >> 8) & 0xff;
1005 arr[num++] = port_group_id & 0xff;
c65b1445
DG		 1006 /* NAA-5, Target device identifier */
1007 arr[num++] = 0x61; /* proto=sas, binary */
1008 arr[num++] = 0xa3; /* piv=1, target device, naa */
1009 arr[num++] = 0x0;
1010 arr[num++] = 0x8;
1011 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
1012 arr[num++] = 0x22;
1013 arr[num++] = 0x22;
1014 arr[num++] = 0x20;
1015 arr[num++] = (target_dev_id >> 24);
1016 arr[num++] = (target_dev_id >> 16) & 0xff;
1017 arr[num++] = (target_dev_id >> 8) & 0xff;
1018 arr[num++] = target_dev_id & 0xff;
1019 /* SCSI name string: Target device identifier */
1020 arr[num++] = 0x63; /* proto=sas, UTF-8 */
1021 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
1022 arr[num++] = 0x0;
1023 arr[num++] = 24;
1024 memcpy(arr + num, "naa.52222220", 12);
1025 num += 12;
1026 snprintf(b, sizeof(b), "%08X", target_dev_id);
1027 memcpy(arr + num, b, 8);
1028 num += 8;
1029 memset(arr + num, 0, 4);
1030 num += 4;
1031 return num;
1032}
1033
1034
1035static unsigned char vpd84_data[] = {
1036/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
1037 0x22,0x22,0x22,0x0,0xbb,0x1,
1038 0x22,0x22,0x22,0x0,0xbb,0x2,
1039};
1040
cbf67842 1041/* Software interface identification VPD page */
c65b1445
DG		 1042static int inquiry_evpd_84(unsigned char * arr)
1043{
1044 memcpy(arr, vpd84_data, sizeof(vpd84_data));
1045 return sizeof(vpd84_data);
1046}
1047
cbf67842 1048/* Management network addresses VPD page */
c65b1445
DG		 1049static int inquiry_evpd_85(unsigned char * arr)
1050{
1051 int num = 0;
1052 const char * na1 = "https://www.kernel.org/config";
1053 const char * na2 = "http://www.kernel.org/log";
1054 int plen, olen;
1055
1056 arr[num++] = 0x1; /* lu, storage config */
1057 arr[num++] = 0x0; /* reserved */
1058 arr[num++] = 0x0;
1059 olen = strlen(na1);
1060 plen = olen + 1;
1061 if (plen % 4)
1062 plen = ((plen / 4) + 1) * 4;
1063 arr[num++] = plen; /* length, null termianted, padded */
1064 memcpy(arr + num, na1, olen);
1065 memset(arr + num + olen, 0, plen - olen);
1066 num += plen;
1067
1068 arr[num++] = 0x4; /* lu, logging */
1069 arr[num++] = 0x0; /* reserved */
1070 arr[num++] = 0x0;
1071 olen = strlen(na2);
1072 plen = olen + 1;
1073 if (plen % 4)
1074 plen = ((plen / 4) + 1) * 4;
1075 arr[num++] = plen; /* length, null terminated, padded */
1076 memcpy(arr + num, na2, olen);
1077 memset(arr + num + olen, 0, plen - olen);
1078 num += plen;
1079
1080 return num;
1081}
1082
1083/* SCSI ports VPD page */
1084static int inquiry_evpd_88(unsigned char * arr, int target_dev_id)
1085{
1086 int num = 0;
1087 int port_a, port_b;
1088
1089 port_a = target_dev_id + 1;
1090 port_b = port_a + 1;
1091 arr[num++] = 0x0; /* reserved */
1092 arr[num++] = 0x0; /* reserved */
1093 arr[num++] = 0x0;
1094 arr[num++] = 0x1; /* relative port 1 (primary) */
1095 memset(arr + num, 0, 6);
1096 num += 6;
1097 arr[num++] = 0x0;
1098 arr[num++] = 12; /* length tp descriptor */
1099 /* naa-5 target port identifier (A) */
1100 arr[num++] = 0x61; /* proto=sas, binary */
1101 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1102 arr[num++] = 0x0; /* reserved */
1103 arr[num++] = 0x8; /* length */
1104 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
1105 arr[num++] = 0x22;
1106 arr[num++] = 0x22;
1107 arr[num++] = 0x20;
1108 arr[num++] = (port_a >> 24);
1109 arr[num++] = (port_a >> 16) & 0xff;
1110 arr[num++] = (port_a >> 8) & 0xff;
1111 arr[num++] = port_a & 0xff;
1112
1113 arr[num++] = 0x0; /* reserved */
1114 arr[num++] = 0x0; /* reserved */
1115 arr[num++] = 0x0;
1116 arr[num++] = 0x2; /* relative port 2 (secondary) */
1117 memset(arr + num, 0, 6);
1118 num += 6;
1119 arr[num++] = 0x0;
1120 arr[num++] = 12; /* length tp descriptor */
1121 /* naa-5 target port identifier (B) */
1122 arr[num++] = 0x61; /* proto=sas, binary */
1123 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1124 arr[num++] = 0x0; /* reserved */
1125 arr[num++] = 0x8; /* length */
1126 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
1127 arr[num++] = 0x22;
1128 arr[num++] = 0x22;
1129 arr[num++] = 0x20;
1130 arr[num++] = (port_b >> 24);
1131 arr[num++] = (port_b >> 16) & 0xff;
1132 arr[num++] = (port_b >> 8) & 0xff;
1133 arr[num++] = port_b & 0xff;
1134
1135 return num;
1136}
1137
1138
1139static unsigned char vpd89_data[] = {
1140/* from 4th byte */ 0,0,0,0,
1141'l','i','n','u','x',' ',' ',' ',
1142'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
1143'1','2','3','4',
11440x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
11450xec,0,0,0,
11460x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
11470,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
11480x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
11490x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
11500x53,0x41,
11510x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
11520x20,0x20,
11530x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
11540x10,0x80,
11550,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
11560x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
11570x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
11580,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
11590x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
11600x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
11610,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
11620,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11630,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11640,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11650x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
11660,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
11670xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
11680,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
11690,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11700,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11710,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11720,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11730,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11740,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11750,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11760,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11770,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11780,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11790,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11800,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
1181};
1182
cbf67842 1183/* ATA Information VPD page */
c65b1445
DG		 1184static int inquiry_evpd_89(unsigned char * arr)
1185{
1186 memcpy(arr, vpd89_data, sizeof(vpd89_data));
1187 return sizeof(vpd89_data);
1188}
1189
1190
1191static unsigned char vpdb0_data[] = {
1e49f785
DG		 1192 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
1193 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1194 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1195 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
c65b1445
DG		 1196};
1197
cbf67842 1198/* Block limits VPD page (SBC-3) */
c65b1445
DG		 1199static int inquiry_evpd_b0(unsigned char * arr)
1200{
ea61fca5
MP		 1201 unsigned int gran;
1202
c65b1445 1203 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
e308b3d1
MP		 1204
1205 /* Optimal transfer length granularity */
ea61fca5
MP		 1206 gran = 1 << scsi_debug_physblk_exp;
1207 arr[2] = (gran >> 8) & 0xff;
1208 arr[3] = gran & 0xff;
e308b3d1
MP		 1209
1210 /* Maximum Transfer Length */
c65b1445
DG		 1211 if (sdebug_store_sectors > 0x400) {
1212 arr[4] = (sdebug_store_sectors >> 24) & 0xff;
1213 arr[5] = (sdebug_store_sectors >> 16) & 0xff;
1214 arr[6] = (sdebug_store_sectors >> 8) & 0xff;
1215 arr[7] = sdebug_store_sectors & 0xff;
1216 }
44d92694 1217
e308b3d1
MP		 1218 /* Optimal Transfer Length */
1219 put_unaligned_be32(scsi_debug_opt_blks, &arr[8]);
1220
5b94e232 1221 if (scsi_debug_lbpu) {
e308b3d1 1222 /* Maximum Unmap LBA Count */
6014759c 1223 put_unaligned_be32(scsi_debug_unmap_max_blocks, &arr[16]);
e308b3d1
MP		 1224
1225 /* Maximum Unmap Block Descriptor Count */
44d92694
MP		 1226 put_unaligned_be32(scsi_debug_unmap_max_desc, &arr[20]);
1227 }
1228
e308b3d1 1229 /* Unmap Granularity Alignment */
44d92694
MP		 1230 if (scsi_debug_unmap_alignment) {
1231 put_unaligned_be32(scsi_debug_unmap_alignment, &arr[28]);
1232 arr[28] |= 0x80; /* UGAVALID */
1233 }
1234
e308b3d1 1235 /* Optimal Unmap Granularity */
6014759c
MP		 1236 put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]);
1237
5b94e232
MP		 1238 /* Maximum WRITE SAME Length */
1239 put_unaligned_be64(scsi_debug_write_same_length, &arr[32]);
1240
1241 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
44d92694 1242
c65b1445 1243 return sizeof(vpdb0_data);
1da177e4
LT		 1244}
1245
1e49f785 1246/* Block device characteristics VPD page (SBC-3) */
eac6e8e4
MW		 1247static int inquiry_evpd_b1(unsigned char *arr)
1248{
1249 memset(arr, 0, 0x3c);
1250 arr[0] = 0;
1e49f785
DG		 1251 arr[1] = 1; /* non rotating medium (e.g. solid state) */
1252 arr[2] = 0;
1253 arr[3] = 5; /* less than 1.8" */
eac6e8e4
MW		 1254
1255 return 0x3c;
1256}
1da177e4 1257
be1dd78d 1258/* Logical block provisioning VPD page (SBC-3) */
6014759c
MP		 1259static int inquiry_evpd_b2(unsigned char *arr)
1260{
3f0bc3b3 1261 memset(arr, 0, 0x4);
6014759c
MP		 1262 arr[0] = 0; /* threshold exponent */
1263
5b94e232 1264 if (scsi_debug_lbpu)
6014759c
MP		 1265 arr[1] = 1 << 7;
1266
5b94e232 1267 if (scsi_debug_lbpws)
6014759c
MP		 1268 arr[1] |= 1 << 6;
1269
5b94e232
MP		 1270 if (scsi_debug_lbpws10)
1271 arr[1] |= 1 << 5;
1272
be1dd78d
ES		 1273 if (scsi_debug_lbprz)
1274 arr[1] |= 1 << 2;
1275
3f0bc3b3 1276 return 0x4;
6014759c
MP		 1277}
1278
1da177e4 1279#define SDEBUG_LONG_INQ_SZ 96
c65b1445 1280#define SDEBUG_MAX_INQ_ARR_SZ 584
1da177e4 1281
c2248fc9 1282static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1da177e4
LT		 1283{
1284 unsigned char pq_pdt;
5a09e398 1285 unsigned char * arr;
01123ef4 1286 unsigned char *cmd = scp->cmnd;
5a09e398 1287 int alloc_len, n, ret;
c2248fc9 1288 bool have_wlun;
1da177e4
LT		 1289
1290 alloc_len = (cmd[3] << 8) + cmd[4];
6f3cbf55
DG		 1291 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
1292 if (! arr)
1293 return DID_REQUEUE << 16;
34d55434 1294 have_wlun = (scp->device->lun == SCSI_W_LUN_REPORT_LUNS);
c2248fc9 1295 if (have_wlun)
c65b1445
DG		 1296 pq_pdt = 0x1e; /* present, wlun */
1297 else if (scsi_debug_no_lun_0 && (0 == devip->lun))
1298 pq_pdt = 0x7f; /* not present, no device type */
1299 else
1300 pq_pdt = (scsi_debug_ptype & 0x1f);
1da177e4
LT		 1301 arr[0] = pq_pdt;
1302 if (0x2 & cmd[1]) { /* CMDDT bit set */
22017ed2 1303 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
5a09e398 1304 kfree(arr);
1da177e4
LT		 1305 return check_condition_result;
1306 } else if (0x1 & cmd[1]) { /* EVPD bit set */
5a09e398 1307 int lu_id_num, port_group_id, target_dev_id, len;
c65b1445
DG		 1308 char lu_id_str[6];
1309 int host_no = devip->sdbg_host->shost->host_no;
1da177e4 1310
5a09e398
HR		 1311 port_group_id = (((host_no + 1) & 0x7f) << 8) +
1312 (devip->channel & 0x7f);
23183910
DG		 1313 if (0 == scsi_debug_vpd_use_hostno)
1314 host_no = 0;
c2248fc9 1315 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) +
c65b1445
DG		 1316 (devip->target * 1000) + devip->lun);
1317 target_dev_id = ((host_no + 1) * 2000) +
1318 (devip->target * 1000) - 3;
1319 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
1da177e4 1320 if (0 == cmd[2]) { /* supported vital product data pages */
c65b1445
DG		 1321 arr[1] = cmd[2]; /*sanity */
1322 n = 4;
1323 arr[n++] = 0x0; /* this page */
1324 arr[n++] = 0x80; /* unit serial number */
1325 arr[n++] = 0x83; /* device identification */
1326 arr[n++] = 0x84; /* software interface ident. */
1327 arr[n++] = 0x85; /* management network addresses */
1328 arr[n++] = 0x86; /* extended inquiry */
1329 arr[n++] = 0x87; /* mode page policy */
1330 arr[n++] = 0x88; /* SCSI ports */
1331 arr[n++] = 0x89; /* ATA information */
1332 arr[n++] = 0xb0; /* Block limits (SBC) */
eac6e8e4 1333 arr[n++] = 0xb1; /* Block characteristics (SBC) */
5b94e232
MP		 1334 if (scsi_debug_lbp()) /* Logical Block Prov. (SBC) */
1335 arr[n++] = 0xb2;
c65b1445 1336 arr[3] = n - 4; /* number of supported VPD pages */
1da177e4 1337 } else if (0x80 == cmd[2]) { /* unit serial number */
c65b1445 1338 arr[1] = cmd[2]; /*sanity */
1da177e4 1339 arr[3] = len;
c65b1445 1340 memcpy(&arr[4], lu_id_str, len);
1da177e4 1341 } else if (0x83 == cmd[2]) { /* device identification */
c65b1445 1342 arr[1] = cmd[2]; /*sanity */
5a09e398
HR		 1343 arr[3] = inquiry_evpd_83(&arr[4], port_group_id,
1344 target_dev_id, lu_id_num,
1345 lu_id_str, len);
c65b1445
DG		 1346 } else if (0x84 == cmd[2]) { /* Software interface ident. */
1347 arr[1] = cmd[2]; /*sanity */
1348 arr[3] = inquiry_evpd_84(&arr[4]);
1349 } else if (0x85 == cmd[2]) { /* Management network addresses */
1350 arr[1] = cmd[2]; /*sanity */
1351 arr[3] = inquiry_evpd_85(&arr[4]);
1352 } else if (0x86 == cmd[2]) { /* extended inquiry */
1353 arr[1] = cmd[2]; /*sanity */
1354 arr[3] = 0x3c; /* number of following entries */
c6a44287
MP		 1355 if (scsi_debug_dif == SD_DIF_TYPE3_PROTECTION)
1356 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
1357 else if (scsi_debug_dif)
1358 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
1359 else
1360 arr[4] = 0x0; /* no protection stuff */
c65b1445
DG		 1361 arr[5] = 0x7; /* head of q, ordered + simple q's */
1362 } else if (0x87 == cmd[2]) { /* mode page policy */
1363 arr[1] = cmd[2]; /*sanity */
1364 arr[3] = 0x8; /* number of following entries */
1365 arr[4] = 0x2; /* disconnect-reconnect mp */
1366 arr[6] = 0x80; /* mlus, shared */
1367 arr[8] = 0x18; /* protocol specific lu */
1368 arr[10] = 0x82; /* mlus, per initiator port */
1369 } else if (0x88 == cmd[2]) { /* SCSI Ports */
1370 arr[1] = cmd[2]; /*sanity */
1371 arr[3] = inquiry_evpd_88(&arr[4], target_dev_id);
1372 } else if (0x89 == cmd[2]) { /* ATA information */
1373 arr[1] = cmd[2]; /*sanity */
1374 n = inquiry_evpd_89(&arr[4]);
1375 arr[2] = (n >> 8);
1376 arr[3] = (n & 0xff);
1377 } else if (0xb0 == cmd[2]) { /* Block limits (SBC) */
1378 arr[1] = cmd[2]; /*sanity */
1379 arr[3] = inquiry_evpd_b0(&arr[4]);
eac6e8e4
MW		 1380 } else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */
1381 arr[1] = cmd[2]; /*sanity */
1382 arr[3] = inquiry_evpd_b1(&arr[4]);
5b94e232 1383 } else if (0xb2 == cmd[2]) { /* Logical Block Prov. (SBC) */
6014759c
MP		 1384 arr[1] = cmd[2]; /*sanity */
1385 arr[3] = inquiry_evpd_b2(&arr[4]);
1da177e4 1386 } else {
22017ed2 1387 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
5a09e398 1388 kfree(arr);
1da177e4
LT		 1389 return check_condition_result;
1390 }
c65b1445 1391 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
5a09e398 1392 ret = fill_from_dev_buffer(scp, arr,
c65b1445 1393 min(len, SDEBUG_MAX_INQ_ARR_SZ));
5a09e398
HR		 1394 kfree(arr);
1395 return ret;
1da177e4
LT		 1396 }
1397 /* drops through here for a standard inquiry */
d986788b 1398 arr[1] = scsi_debug_removable ? 0x80 : 0; /* Removable disk */
1da177e4
LT		 1399 arr[2] = scsi_debug_scsi_level;
1400 arr[3] = 2; /* response_data_format==2 */
1401 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
c6a44287 1402 arr[5] = scsi_debug_dif ? 1 : 0; /* PROTECT bit */
5a09e398
HR		 1403 if (0 == scsi_debug_vpd_use_hostno)
1404 arr[5] = 0x10; /* claim: implicit TGPS */
c65b1445 1405 arr[6] = 0x10; /* claim: MultiP */
1da177e4 1406 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
c65b1445 1407 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
1da177e4
LT		 1408 memcpy(&arr[8], inq_vendor_id, 8);
1409 memcpy(&arr[16], inq_product_id, 16);
1410 memcpy(&arr[32], inq_product_rev, 4);
1411 /* version descriptors (2 bytes each) follow */
e46b0344
DG		 1412 arr[58] = 0x0; arr[59] = 0xa2; /* SAM-5 rev 4 */
1413 arr[60] = 0x4; arr[61] = 0x68; /* SPC-4 rev 37 */
c65b1445 1414 n = 62;
1da177e4 1415 if (scsi_debug_ptype == 0) {
e46b0344 1416 arr[n++] = 0x4; arr[n++] = 0xc5; /* SBC-4 rev 36 */
1da177e4 1417 } else if (scsi_debug_ptype == 1) {
e46b0344 1418 arr[n++] = 0x5; arr[n++] = 0x25; /* SSC-4 rev 3 */
1da177e4 1419 }
e46b0344 1420 arr[n++] = 0x20; arr[n++] = 0xe6; /* SPL-3 rev 7 */
5a09e398 1421 ret = fill_from_dev_buffer(scp, arr,
1da177e4 1422 min(alloc_len, SDEBUG_LONG_INQ_SZ));
5a09e398
HR		 1423 kfree(arr);
1424 return ret;
1da177e4
LT		 1425}
1426
1427static int resp_requests(struct scsi_cmnd * scp,
1428 struct sdebug_dev_info * devip)
1429{
1430 unsigned char * sbuff;
01123ef4 1431 unsigned char *cmd = scp->cmnd;
cbf67842 1432 unsigned char arr[SCSI_SENSE_BUFFERSIZE];
2492fc09 1433 bool dsense;
1da177e4
LT		 1434 int len = 18;
1435
c65b1445 1436 memset(arr, 0, sizeof(arr));
c2248fc9 1437 dsense = !!(cmd[1] & 1);
cbf67842 1438 sbuff = scp->sense_buffer;
c65b1445 1439 if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
c2248fc9 1440 if (dsense) {
c65b1445
DG		 1441 arr[0] = 0x72;
1442 arr[1] = 0x0; /* NO_SENSE in sense_key */
1443 arr[2] = THRESHOLD_EXCEEDED;
1444 arr[3] = 0xff; /* TEST set and MRIE==6 */
c2248fc9 1445 len = 8;
c65b1445
DG		 1446 } else {
1447 arr[0] = 0x70;
1448 arr[2] = 0x0; /* NO_SENSE in sense_key */
1449 arr[7] = 0xa; /* 18 byte sense buffer */
1450 arr[12] = THRESHOLD_EXCEEDED;
1451 arr[13] = 0xff; /* TEST set and MRIE==6 */
1452 }
c65b1445 1453 } else {
cbf67842 1454 memcpy(arr, sbuff, SCSI_SENSE_BUFFERSIZE);
c2248fc9
DG		 1455 if (arr[0] >= 0x70 && dsense == scsi_debug_dsense)
1456 ; /* have sense and formats match */
1457 else if (arr[0] <= 0x70) {
1458 if (dsense) {
1459 memset(arr, 0, 8);
1460 arr[0] = 0x72;
1461 len = 8;
1462 } else {
1463 memset(arr, 0, 18);
1464 arr[0] = 0x70;
1465 arr[7] = 0xa;
1466 }
1467 } else if (dsense) {
1468 memset(arr, 0, 8);
c65b1445
DG		 1469 arr[0] = 0x72;
1470 arr[1] = sbuff[2]; /* sense key */
1471 arr[2] = sbuff[12]; /* asc */
1472 arr[3] = sbuff[13]; /* ascq */
1473 len = 8;
c2248fc9
DG		 1474 } else {
1475 memset(arr, 0, 18);
1476 arr[0] = 0x70;
1477 arr[2] = sbuff[1];
1478 arr[7] = 0xa;
1479 arr[12] = sbuff[1];
1480 arr[13] = sbuff[3];
c65b1445 1481 }
c2248fc9 1482
c65b1445 1483 }
cbf67842 1484 mk_sense_buffer(scp, 0, NO_ADDITIONAL_SENSE, 0);
1da177e4
LT		 1485 return fill_from_dev_buffer(scp, arr, len);
1486}
1487
c65b1445
DG		 1488static int resp_start_stop(struct scsi_cmnd * scp,
1489 struct sdebug_dev_info * devip)
1490{
01123ef4 1491 unsigned char *cmd = scp->cmnd;
c2248fc9 1492 int power_cond, start;
c65b1445 1493
c65b1445
DG		 1494 power_cond = (cmd[4] & 0xf0) >> 4;
1495 if (power_cond) {
22017ed2 1496 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
c65b1445
DG		 1497 return check_condition_result;
1498 }
1499 start = cmd[4] & 1;
1500 if (start == devip->stopped)
1501 devip->stopped = !start;
1502 return 0;
1503}
1504
28898873
FT		 1505static sector_t get_sdebug_capacity(void)
1506{
1507 if (scsi_debug_virtual_gb > 0)
5447ed6c
DG		 1508 return (sector_t)scsi_debug_virtual_gb *
1509 (1073741824 / scsi_debug_sector_size);
28898873
FT		 1510 else
1511 return sdebug_store_sectors;
1512}
1513
1da177e4
LT		 1514#define SDEBUG_READCAP_ARR_SZ 8
1515static int resp_readcap(struct scsi_cmnd * scp,
1516 struct sdebug_dev_info * devip)
1517{
1518 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
c65b1445 1519 unsigned int capac;
1da177e4 1520
c65b1445 1521 /* following just in case virtual_gb changed */
28898873 1522 sdebug_capacity = get_sdebug_capacity();
1da177e4 1523 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
c65b1445
DG		 1524 if (sdebug_capacity < 0xffffffff) {
1525 capac = (unsigned int)sdebug_capacity - 1;
1526 arr[0] = (capac >> 24);
1527 arr[1] = (capac >> 16) & 0xff;
1528 arr[2] = (capac >> 8) & 0xff;
1529 arr[3] = capac & 0xff;
1530 } else {
1531 arr[0] = 0xff;
1532 arr[1] = 0xff;
1533 arr[2] = 0xff;
1534 arr[3] = 0xff;
1535 }
597136ab
MP		 1536 arr[6] = (scsi_debug_sector_size >> 8) & 0xff;
1537 arr[7] = scsi_debug_sector_size & 0xff;
1da177e4
LT		 1538 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1539}
1540
c65b1445
DG		 1541#define SDEBUG_READCAP16_ARR_SZ 32
1542static int resp_readcap16(struct scsi_cmnd * scp,
1543 struct sdebug_dev_info * devip)
1544{
01123ef4 1545 unsigned char *cmd = scp->cmnd;
c65b1445
DG		 1546 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
1547 unsigned long long capac;
c2248fc9 1548 int k, alloc_len;
c65b1445 1549
c65b1445
DG		 1550 alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8)
1551 + cmd[13]);
1552 /* following just in case virtual_gb changed */
28898873 1553 sdebug_capacity = get_sdebug_capacity();
c65b1445
DG		 1554 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
1555 capac = sdebug_capacity - 1;
1556 for (k = 0; k < 8; ++k, capac >>= 8)
1557 arr[7 - k] = capac & 0xff;
597136ab
MP		 1558 arr[8] = (scsi_debug_sector_size >> 24) & 0xff;
1559 arr[9] = (scsi_debug_sector_size >> 16) & 0xff;
1560 arr[10] = (scsi_debug_sector_size >> 8) & 0xff;
1561 arr[11] = scsi_debug_sector_size & 0xff;
ea61fca5
MP		 1562 arr[13] = scsi_debug_physblk_exp & 0xf;
1563 arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f;
44d92694 1564
be1dd78d 1565 if (scsi_debug_lbp()) {
5b94e232 1566 arr[14] |= 0x80; /* LBPME */
be1dd78d
ES		 1567 if (scsi_debug_lbprz)
1568 arr[14] |= 0x40; /* LBPRZ */
1569 }
44d92694 1570
ea61fca5 1571 arr[15] = scsi_debug_lowest_aligned & 0xff;
c6a44287
MP		 1572
1573 if (scsi_debug_dif) {
1574 arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */
1575 arr[12] |= 1; /* PROT_EN */
1576 }
1577
c65b1445
DG		 1578 return fill_from_dev_buffer(scp, arr,
1579 min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
1580}
1581
5a09e398
HR		 1582#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1583
1584static int resp_report_tgtpgs(struct scsi_cmnd * scp,
1585 struct sdebug_dev_info * devip)
1586{
01123ef4 1587 unsigned char *cmd = scp->cmnd;
5a09e398
HR		 1588 unsigned char * arr;
1589 int host_no = devip->sdbg_host->shost->host_no;
1590 int n, ret, alen, rlen;
1591 int port_group_a, port_group_b, port_a, port_b;
1592
1593 alen = ((cmd[6] << 24) + (cmd[7] << 16) + (cmd[8] << 8)
1594 + cmd[9]);
1595
6f3cbf55
DG		 1596 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1597 if (! arr)
1598 return DID_REQUEUE << 16;
5a09e398
HR		 1599 /*
1600 * EVPD page 0x88 states we have two ports, one
1601 * real and a fake port with no device connected.
1602 * So we create two port groups with one port each
1603 * and set the group with port B to unavailable.
1604 */
1605 port_a = 0x1; /* relative port A */
1606 port_b = 0x2; /* relative port B */
1607 port_group_a = (((host_no + 1) & 0x7f) << 8) +
1608 (devip->channel & 0x7f);
1609 port_group_b = (((host_no + 1) & 0x7f) << 8) +
1610 (devip->channel & 0x7f) + 0x80;
1611
1612 /*
1613 * The asymmetric access state is cycled according to the host_id.
1614 */
1615 n = 4;
1616 if (0 == scsi_debug_vpd_use_hostno) {
1617 arr[n++] = host_no % 3; /* Asymm access state */
1618 arr[n++] = 0x0F; /* claim: all states are supported */
1619 } else {
1620 arr[n++] = 0x0; /* Active/Optimized path */
1621 arr[n++] = 0x01; /* claim: only support active/optimized paths */
1622 }
1623 arr[n++] = (port_group_a >> 8) & 0xff;
1624 arr[n++] = port_group_a & 0xff;
1625 arr[n++] = 0; /* Reserved */
1626 arr[n++] = 0; /* Status code */
1627 arr[n++] = 0; /* Vendor unique */
1628 arr[n++] = 0x1; /* One port per group */
1629 arr[n++] = 0; /* Reserved */
1630 arr[n++] = 0; /* Reserved */
1631 arr[n++] = (port_a >> 8) & 0xff;
1632 arr[n++] = port_a & 0xff;
1633 arr[n++] = 3; /* Port unavailable */
1634 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
1635 arr[n++] = (port_group_b >> 8) & 0xff;
1636 arr[n++] = port_group_b & 0xff;
1637 arr[n++] = 0; /* Reserved */
1638 arr[n++] = 0; /* Status code */
1639 arr[n++] = 0; /* Vendor unique */
1640 arr[n++] = 0x1; /* One port per group */
1641 arr[n++] = 0; /* Reserved */
1642 arr[n++] = 0; /* Reserved */
1643 arr[n++] = (port_b >> 8) & 0xff;
1644 arr[n++] = port_b & 0xff;
1645
1646 rlen = n - 4;
1647 arr[0] = (rlen >> 24) & 0xff;
1648 arr[1] = (rlen >> 16) & 0xff;
1649 arr[2] = (rlen >> 8) & 0xff;
1650 arr[3] = rlen & 0xff;
1651
1652 /*
1653 * Return the smallest value of either
1654 * - The allocated length
1655 * - The constructed command length
1656 * - The maximum array size
1657 */
1658 rlen = min(alen,n);
1659 ret = fill_from_dev_buffer(scp, arr,
1660 min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1661 kfree(arr);
1662 return ret;
1663}
1664
38d5c833
DG		 1665static int
1666resp_rsup_opcodes(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1667{
1668 bool rctd;
1669 u8 reporting_opts, req_opcode, sdeb_i, supp;
1670 u16 req_sa, u;
1671 u32 alloc_len, a_len;
1672 int k, offset, len, errsts, count, bump, na;
1673 const struct opcode_info_t *oip;
1674 const struct opcode_info_t *r_oip;
1675 u8 *arr;
1676 u8 *cmd = scp->cmnd;
1677
1678 rctd = !!(cmd[2] & 0x80);
1679 reporting_opts = cmd[2] & 0x7;
1680 req_opcode = cmd[3];
1681 req_sa = get_unaligned_be16(cmd + 4);
1682 alloc_len = get_unaligned_be32(cmd + 6);
6d310dfb 1683 if (alloc_len < 4 || alloc_len > 0xffff) {
38d5c833
DG		 1684 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1685 return check_condition_result;
1686 }
1687 if (alloc_len > 8192)
1688 a_len = 8192;
1689 else
1690 a_len = alloc_len;
99531e60 1691 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC);
38d5c833
DG		 1692 if (NULL == arr) {
1693 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
1694 INSUFF_RES_ASCQ);
1695 return check_condition_result;
1696 }
1697 switch (reporting_opts) {
1698 case 0: /* all commands */
1699 /* count number of commands */
1700 for (count = 0, oip = opcode_info_arr;
1701 oip->num_attached != 0xff; ++oip) {
1702 if (F_INV_OP & oip->flags)
1703 continue;
1704 count += (oip->num_attached + 1);
1705 }
1706 bump = rctd ? 20 : 8;
1707 put_unaligned_be32(count * bump, arr);
1708 for (offset = 4, oip = opcode_info_arr;
1709 oip->num_attached != 0xff && offset < a_len; ++oip) {
1710 if (F_INV_OP & oip->flags)
1711 continue;
1712 na = oip->num_attached;
1713 arr[offset] = oip->opcode;
1714 put_unaligned_be16(oip->sa, arr + offset + 2);
1715 if (rctd)
1716 arr[offset + 5] |= 0x2;
1717 if (FF_SA & oip->flags)
1718 arr[offset + 5] |= 0x1;
1719 put_unaligned_be16(oip->len_mask[0], arr + offset + 6);
1720 if (rctd)
1721 put_unaligned_be16(0xa, arr + offset + 8);
1722 r_oip = oip;
1723 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) {
1724 if (F_INV_OP & oip->flags)
1725 continue;
1726 offset += bump;
1727 arr[offset] = oip->opcode;
1728 put_unaligned_be16(oip->sa, arr + offset + 2);
1729 if (rctd)
1730 arr[offset + 5] |= 0x2;
1731 if (FF_SA & oip->flags)
1732 arr[offset + 5] |= 0x1;
1733 put_unaligned_be16(oip->len_mask[0],
1734 arr + offset + 6);
1735 if (rctd)
1736 put_unaligned_be16(0xa,
1737 arr + offset + 8);
1738 }
1739 oip = r_oip;
1740 offset += bump;
1741 }
1742 break;
1743 case 1: /* one command: opcode only */
1744 case 2: /* one command: opcode plus service action */
1745 case 3: /* one command: if sa==0 then opcode only else opcode+sa */
1746 sdeb_i = opcode_ind_arr[req_opcode];
1747 oip = &opcode_info_arr[sdeb_i];
1748 if (F_INV_OP & oip->flags) {
1749 supp = 1;
1750 offset = 4;
1751 } else {
1752 if (1 == reporting_opts) {
1753 if (FF_SA & oip->flags) {
1754 mk_sense_invalid_fld(scp, SDEB_IN_CDB,
1755 2, 2);
1756 kfree(arr);
1757 return check_condition_result;
1758 }
1759 req_sa = 0;
1760 } else if (2 == reporting_opts &&
1761 0 == (FF_SA & oip->flags)) {
1762 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
1763 kfree(arr); /* point at requested sa */
1764 return check_condition_result;
1765 }
1766 if (0 == (FF_SA & oip->flags) &&
1767 req_opcode == oip->opcode)
1768 supp = 3;
1769 else if (0 == (FF_SA & oip->flags)) {
1770 na = oip->num_attached;
1771 for (k = 0, oip = oip->arrp; k < na;
1772 ++k, ++oip) {
1773 if (req_opcode == oip->opcode)
1774 break;
1775 }
1776 supp = (k >= na) ? 1 : 3;
1777 } else if (req_sa != oip->sa) {
1778 na = oip->num_attached;
1779 for (k = 0, oip = oip->arrp; k < na;
1780 ++k, ++oip) {
1781 if (req_sa == oip->sa)
1782 break;
1783 }
1784 supp = (k >= na) ? 1 : 3;
1785 } else
1786 supp = 3;
1787 if (3 == supp) {
1788 u = oip->len_mask[0];
1789 put_unaligned_be16(u, arr + 2);
1790 arr[4] = oip->opcode;
1791 for (k = 1; k < u; ++k)
1792 arr[4 + k] = (k < 16) ?
1793 oip->len_mask[k] : 0xff;
1794 offset = 4 + u;
1795 } else
1796 offset = 4;
1797 }
1798 arr[1] = (rctd ? 0x80 : 0) | supp;
1799 if (rctd) {
1800 put_unaligned_be16(0xa, arr + offset);
1801 offset += 12;
1802 }
1803 break;
1804 default:
1805 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
1806 kfree(arr);
1807 return check_condition_result;
1808 }
1809 offset = (offset < a_len) ? offset : a_len;
1810 len = (offset < alloc_len) ? offset : alloc_len;
1811 errsts = fill_from_dev_buffer(scp, arr, len);
1812 kfree(arr);
1813 return errsts;
1814}
1815
1816static int
1817resp_rsup_tmfs(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1818{
1819 bool repd;
1820 u32 alloc_len, len;
1821 u8 arr[16];
1822 u8 *cmd = scp->cmnd;
1823
1824 memset(arr, 0, sizeof(arr));
1825 repd = !!(cmd[2] & 0x80);
1826 alloc_len = get_unaligned_be32(cmd + 6);
1827 if (alloc_len < 4) {
1828 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1829 return check_condition_result;
1830 }
1831 arr[0] = 0xc8; /* ATS | ATSS | LURS */
1832 arr[1] = 0x1; /* ITNRS */
1833 if (repd) {
1834 arr[3] = 0xc;
1835 len = 16;
1836 } else
1837 len = 4;
1838
1839 len = (len < alloc_len) ? len : alloc_len;
1840 return fill_from_dev_buffer(scp, arr, len);
1841}
1842
1da177e4
LT		 1843/* <<Following mode page info copied from ST318451LW>> */
1844
1845static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target)
1846{ /* Read-Write Error Recovery page for mode_sense */
1847 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
1848 5, 0, 0xff, 0xff};
1849
1850 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
1851 if (1 == pcontrol)
1852 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
1853 return sizeof(err_recov_pg);
1854}
1855
1856static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target)
1857{ /* Disconnect-Reconnect page for mode_sense */
1858 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
1859 0, 0, 0, 0, 0, 0, 0, 0};
1860
1861 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
1862 if (1 == pcontrol)
1863 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
1864 return sizeof(disconnect_pg);
1865}
1866
1867static int resp_format_pg(unsigned char * p, int pcontrol, int target)
1868{ /* Format device page for mode_sense */
597136ab
MP		 1869 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
1870 0, 0, 0, 0, 0, 0, 0, 0,
1871 0, 0, 0, 0, 0x40, 0, 0, 0};
1872
1873 memcpy(p, format_pg, sizeof(format_pg));
1874 p[10] = (sdebug_sectors_per >> 8) & 0xff;
1875 p[11] = sdebug_sectors_per & 0xff;
1876 p[12] = (scsi_debug_sector_size >> 8) & 0xff;
1877 p[13] = scsi_debug_sector_size & 0xff;
d986788b 1878 if (scsi_debug_removable)
597136ab
MP		 1879 p[20] |= 0x20; /* should agree with INQUIRY */
1880 if (1 == pcontrol)
1881 memset(p + 2, 0, sizeof(format_pg) - 2);
1882 return sizeof(format_pg);
1da177e4
LT		 1883}
1884
1885static int resp_caching_pg(unsigned char * p, int pcontrol, int target)
1886{ /* Caching page for mode_sense */
cbf67842
DG		 1887 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
1888 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
1889 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
1da177e4
LT		 1890 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
1891
cbf67842
DG		 1892 if (SCSI_DEBUG_OPT_N_WCE & scsi_debug_opts)
1893 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
1da177e4
LT		 1894 memcpy(p, caching_pg, sizeof(caching_pg));
1895 if (1 == pcontrol)
cbf67842
DG		 1896 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
1897 else if (2 == pcontrol)
1898 memcpy(p, d_caching_pg, sizeof(d_caching_pg));
1da177e4
LT		 1899 return sizeof(caching_pg);
1900}
1901
1902static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
1903{ /* Control mode page for mode_sense */
c65b1445
DG		 1904 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
1905 0, 0, 0, 0};
1906 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
1da177e4
LT		 1907 0, 0, 0x2, 0x4b};
1908
1909 if (scsi_debug_dsense)
1910 ctrl_m_pg[2] |= 0x4;
c65b1445
DG		 1911 else
1912 ctrl_m_pg[2] &= ~0x4;
c6a44287
MP		 1913
1914 if (scsi_debug_ato)
1915 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
1916
1da177e4
LT		 1917 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
1918 if (1 == pcontrol)
c65b1445
DG		 1919 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
1920 else if (2 == pcontrol)
1921 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
1da177e4
LT		 1922 return sizeof(ctrl_m_pg);
1923}
1924
c65b1445 1925
1da177e4
LT		 1926static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target)
1927{ /* Informational Exceptions control mode page for mode_sense */
c65b1445
DG		 1928 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
1929 0, 0, 0x0, 0x0};
1930 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1931 0, 0, 0x0, 0x0};
1932
1da177e4
LT		 1933 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
1934 if (1 == pcontrol)
c65b1445
DG		 1935 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
1936 else if (2 == pcontrol)
1937 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
1da177e4
LT		 1938 return sizeof(iec_m_pg);
1939}
1940
c65b1445
DG		 1941static int resp_sas_sf_m_pg(unsigned char * p, int pcontrol, int target)
1942{ /* SAS SSP mode page - short format for mode_sense */
1943 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
1944 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
1945
1946 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
1947 if (1 == pcontrol)
1948 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
1949 return sizeof(sas_sf_m_pg);
1950}
1951
1952
1953static int resp_sas_pcd_m_spg(unsigned char * p, int pcontrol, int target,
1954 int target_dev_id)
1955{ /* SAS phy control and discover mode page for mode_sense */
1956 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
1957 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
1958 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1959 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1960 0x2, 0, 0, 0, 0, 0, 0, 0,
1961 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1962 0, 0, 0, 0, 0, 0, 0, 0,
1963 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
1964 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1965 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1966 0x3, 0, 0, 0, 0, 0, 0, 0,
1967 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1968 0, 0, 0, 0, 0, 0, 0, 0,
1969 };
1970 int port_a, port_b;
1971
1972 port_a = target_dev_id + 1;
1973 port_b = port_a + 1;
1974 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
1975 p[20] = (port_a >> 24);
1976 p[21] = (port_a >> 16) & 0xff;
1977 p[22] = (port_a >> 8) & 0xff;
1978 p[23] = port_a & 0xff;
1979 p[48 + 20] = (port_b >> 24);
1980 p[48 + 21] = (port_b >> 16) & 0xff;
1981 p[48 + 22] = (port_b >> 8) & 0xff;
1982 p[48 + 23] = port_b & 0xff;
1983 if (1 == pcontrol)
1984 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
1985 return sizeof(sas_pcd_m_pg);
1986}
1987
1988static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol)
1989{ /* SAS SSP shared protocol specific port mode subpage */
1990 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
1991 0, 0, 0, 0, 0, 0, 0, 0,
1992 };
1993
1994 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
1995 if (1 == pcontrol)
1996 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
1997 return sizeof(sas_sha_m_pg);
1998}
1999
1da177e4
LT		 2000#define SDEBUG_MAX_MSENSE_SZ 256
2001
c2248fc9
DG		 2002static int
2003resp_mode_sense(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1da177e4 2004{
23183910
DG		 2005 unsigned char dbd, llbaa;
2006 int pcontrol, pcode, subpcode, bd_len;
1da177e4 2007 unsigned char dev_spec;
c2248fc9
DG		 2008 int k, alloc_len, msense_6, offset, len, target_dev_id;
2009 int target = scp->device->id;
1da177e4
LT		 2010 unsigned char * ap;
2011 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
01123ef4 2012 unsigned char *cmd = scp->cmnd;
1da177e4 2013
23183910 2014 dbd = !!(cmd[1] & 0x8);
1da177e4
LT		 2015 pcontrol = (cmd[2] & 0xc0) >> 6;
2016 pcode = cmd[2] & 0x3f;
2017 subpcode = cmd[3];
2018 msense_6 = (MODE_SENSE == cmd[0]);
23183910
DG		 2019 llbaa = msense_6 ? 0 : !!(cmd[1] & 0x10);
2020 if ((0 == scsi_debug_ptype) && (0 == dbd))
2021 bd_len = llbaa ? 16 : 8;
2022 else
2023 bd_len = 0;
1da177e4
LT		 2024 alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]);
2025 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
2026 if (0x3 == pcontrol) { /* Saving values not supported */
cbf67842 2027 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
1da177e4
LT		 2028 return check_condition_result;
2029 }
c65b1445
DG		 2030 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
2031 (devip->target * 1000) - 3;
23183910
DG		 2032 /* set DPOFUA bit for disks */
2033 if (0 == scsi_debug_ptype)
2034 dev_spec = (DEV_READONLY(target) ? 0x80 : 0x0) | 0x10;
2035 else
2036 dev_spec = 0x0;
1da177e4
LT		 2037 if (msense_6) {
2038 arr[2] = dev_spec;
23183910 2039 arr[3] = bd_len;
1da177e4
LT		 2040 offset = 4;
2041 } else {
2042 arr[3] = dev_spec;
23183910
DG		 2043 if (16 == bd_len)
2044 arr[4] = 0x1; /* set LONGLBA bit */
2045 arr[7] = bd_len; /* assume 255 or less */
1da177e4
LT		 2046 offset = 8;
2047 }
2048 ap = arr + offset;
28898873
FT		 2049 if ((bd_len > 0) && (!sdebug_capacity))
2050 sdebug_capacity = get_sdebug_capacity();
2051
23183910
DG		 2052 if (8 == bd_len) {
2053 if (sdebug_capacity > 0xfffffffe) {
2054 ap[0] = 0xff;
2055 ap[1] = 0xff;
2056 ap[2] = 0xff;
2057 ap[3] = 0xff;
2058 } else {
2059 ap[0] = (sdebug_capacity >> 24) & 0xff;
2060 ap[1] = (sdebug_capacity >> 16) & 0xff;
2061 ap[2] = (sdebug_capacity >> 8) & 0xff;
2062 ap[3] = sdebug_capacity & 0xff;
2063 }
597136ab
MP		 2064 ap[6] = (scsi_debug_sector_size >> 8) & 0xff;
2065 ap[7] = scsi_debug_sector_size & 0xff;
23183910
DG		 2066 offset += bd_len;
2067 ap = arr + offset;
2068 } else if (16 == bd_len) {
2069 unsigned long long capac = sdebug_capacity;
2070
2071 for (k = 0; k < 8; ++k, capac >>= 8)
2072 ap[7 - k] = capac & 0xff;
597136ab
MP		 2073 ap[12] = (scsi_debug_sector_size >> 24) & 0xff;
2074 ap[13] = (scsi_debug_sector_size >> 16) & 0xff;
2075 ap[14] = (scsi_debug_sector_size >> 8) & 0xff;
2076 ap[15] = scsi_debug_sector_size & 0xff;
23183910
DG		 2077 offset += bd_len;
2078 ap = arr + offset;
2079 }
1da177e4 2080
c65b1445
DG		 2081 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
2082 /* TODO: Control Extension page */
22017ed2 2083 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
1da177e4
LT		 2084 return check_condition_result;
2085 }
2086 switch (pcode) {
2087 case 0x1: /* Read-Write error recovery page, direct access */
2088 len = resp_err_recov_pg(ap, pcontrol, target);
2089 offset += len;
2090 break;
2091 case 0x2: /* Disconnect-Reconnect page, all devices */
2092 len = resp_disconnect_pg(ap, pcontrol, target);
2093 offset += len;
2094 break;
2095 case 0x3: /* Format device page, direct access */
2096 len = resp_format_pg(ap, pcontrol, target);
2097 offset += len;
2098 break;
2099 case 0x8: /* Caching page, direct access */
2100 len = resp_caching_pg(ap, pcontrol, target);
2101 offset += len;
2102 break;
2103 case 0xa: /* Control Mode page, all devices */
2104 len = resp_ctrl_m_pg(ap, pcontrol, target);
2105 offset += len;
2106 break;
c65b1445
DG		 2107 case 0x19: /* if spc==1 then sas phy, control+discover */
2108 if ((subpcode > 0x2) && (subpcode < 0xff)) {
22017ed2 2109 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
c65b1445
DG		 2110 return check_condition_result;
2111 }
2112 len = 0;
2113 if ((0x0 == subpcode) || (0xff == subpcode))
2114 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2115 if ((0x1 == subpcode) || (0xff == subpcode))
2116 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
2117 target_dev_id);
2118 if ((0x2 == subpcode) || (0xff == subpcode))
2119 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2120 offset += len;
2121 break;
1da177e4
LT		 2122 case 0x1c: /* Informational Exceptions Mode page, all devices */
2123 len = resp_iec_m_pg(ap, pcontrol, target);
2124 offset += len;
2125 break;
2126 case 0x3f: /* Read all Mode pages */
c65b1445
DG		 2127 if ((0 == subpcode) || (0xff == subpcode)) {
2128 len = resp_err_recov_pg(ap, pcontrol, target);
2129 len += resp_disconnect_pg(ap + len, pcontrol, target);
2130 len += resp_format_pg(ap + len, pcontrol, target);
2131 len += resp_caching_pg(ap + len, pcontrol, target);
2132 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
2133 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2134 if (0xff == subpcode) {
2135 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
2136 target, target_dev_id);
2137 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2138 }
2139 len += resp_iec_m_pg(ap + len, pcontrol, target);
2140 } else {
22017ed2 2141 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
c65b1445
DG		 2142 return check_condition_result;
2143 }
1da177e4
LT		 2144 offset += len;
2145 break;
2146 default:
22017ed2 2147 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
1da177e4
LT		 2148 return check_condition_result;
2149 }
2150 if (msense_6)
2151 arr[0] = offset - 1;
2152 else {
2153 arr[0] = ((offset - 2) >> 8) & 0xff;
2154 arr[1] = (offset - 2) & 0xff;
2155 }
2156 return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
2157}
2158
c65b1445
DG		 2159#define SDEBUG_MAX_MSELECT_SZ 512
2160
c2248fc9
DG		 2161static int
2162resp_mode_select(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
c65b1445
DG		 2163{
2164 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
c2248fc9 2165 int param_len, res, mpage;
c65b1445 2166 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
01123ef4 2167 unsigned char *cmd = scp->cmnd;
c2248fc9 2168 int mselect6 = (MODE_SELECT == cmd[0]);
c65b1445 2169
c65b1445
DG		 2170 memset(arr, 0, sizeof(arr));
2171 pf = cmd[1] & 0x10;
2172 sp = cmd[1] & 0x1;
2173 param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]);
2174 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
22017ed2 2175 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1);
c65b1445
DG		 2176 return check_condition_result;
2177 }
2178 res = fetch_to_dev_buffer(scp, arr, param_len);
2179 if (-1 == res)
2180 return (DID_ERROR << 16);
2181 else if ((res < param_len) &&
2182 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
cbf67842
DG		 2183 sdev_printk(KERN_INFO, scp->device,
2184 "%s: cdb indicated=%d, IO sent=%d bytes\n",
2185 __func__, param_len, res);
c65b1445
DG		 2186 md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2);
2187 bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]);
23183910 2188 if (md_len > 2) {
22017ed2 2189 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1);
c65b1445
DG		 2190 return check_condition_result;
2191 }
2192 off = bd_len + (mselect6 ? 4 : 8);
2193 mpage = arr[off] & 0x3f;
2194 ps = !!(arr[off] & 0x80);
2195 if (ps) {
22017ed2 2196 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7);
c65b1445
DG		 2197 return check_condition_result;
2198 }
2199 spf = !!(arr[off] & 0x40);
2200 pg_len = spf ? ((arr[off + 2] << 8) + arr[off + 3] + 4) :
2201 (arr[off + 1] + 2);
2202 if ((pg_len + off) > param_len) {
cbf67842 2203 mk_sense_buffer(scp, ILLEGAL_REQUEST,
c65b1445
DG		 2204 PARAMETER_LIST_LENGTH_ERR, 0);
2205 return check_condition_result;
2206 }
2207 switch (mpage) {
cbf67842
DG		 2208 case 0x8: /* Caching Mode page */
2209 if (caching_pg[1] == arr[off + 1]) {
2210 memcpy(caching_pg + 2, arr + off + 2,
2211 sizeof(caching_pg) - 2);
2212 goto set_mode_changed_ua;
2213 }
2214 break;
c65b1445
DG		 2215 case 0xa: /* Control Mode page */
2216 if (ctrl_m_pg[1] == arr[off + 1]) {
2217 memcpy(ctrl_m_pg + 2, arr + off + 2,
2218 sizeof(ctrl_m_pg) - 2);
2219 scsi_debug_dsense = !!(ctrl_m_pg[2] & 0x4);
cbf67842 2220 goto set_mode_changed_ua;
c65b1445
DG		 2221 }
2222 break;
2223 case 0x1c: /* Informational Exceptions Mode page */
2224 if (iec_m_pg[1] == arr[off + 1]) {
2225 memcpy(iec_m_pg + 2, arr + off + 2,
2226 sizeof(iec_m_pg) - 2);
cbf67842 2227 goto set_mode_changed_ua;
c65b1445
DG		 2228 }
2229 break;
2230 default:
2231 break;
2232 }
22017ed2 2233 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5);
c65b1445 2234 return check_condition_result;
cbf67842
DG		 2235set_mode_changed_ua:
2236 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
2237 return 0;
c65b1445
DG		 2238}
2239
2240static int resp_temp_l_pg(unsigned char * arr)
2241{
2242 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
2243 0x0, 0x1, 0x3, 0x2, 0x0, 65,
2244 };
2245
2246 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
2247 return sizeof(temp_l_pg);
2248}
2249
2250static int resp_ie_l_pg(unsigned char * arr)
2251{
2252 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
2253 };
2254
2255 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
2256 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
2257 arr[4] = THRESHOLD_EXCEEDED;
2258 arr[5] = 0xff;
2259 }
2260 return sizeof(ie_l_pg);
2261}
2262
2263#define SDEBUG_MAX_LSENSE_SZ 512
2264
2265static int resp_log_sense(struct scsi_cmnd * scp,
2266 struct sdebug_dev_info * devip)
2267{
c2248fc9 2268 int ppc, sp, pcontrol, pcode, subpcode, alloc_len, len, n;
c65b1445 2269 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
01123ef4 2270 unsigned char *cmd = scp->cmnd;
c65b1445 2271
c65b1445
DG		 2272 memset(arr, 0, sizeof(arr));
2273 ppc = cmd[1] & 0x2;
2274 sp = cmd[1] & 0x1;
2275 if (ppc || sp) {
22017ed2 2276 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0);
c65b1445
DG		 2277 return check_condition_result;
2278 }
2279 pcontrol = (cmd[2] & 0xc0) >> 6;
2280 pcode = cmd[2] & 0x3f;
23183910 2281 subpcode = cmd[3] & 0xff;
c65b1445
DG		 2282 alloc_len = (cmd[7] << 8) + cmd[8];
2283 arr[0] = pcode;
23183910
DG		 2284 if (0 == subpcode) {
2285 switch (pcode) {
2286 case 0x0: /* Supported log pages log page */
2287 n = 4;
2288 arr[n++] = 0x0; /* this page */
2289 arr[n++] = 0xd; /* Temperature */
2290 arr[n++] = 0x2f; /* Informational exceptions */
2291 arr[3] = n - 4;
2292 break;
2293 case 0xd: /* Temperature log page */
2294 arr[3] = resp_temp_l_pg(arr + 4);
2295 break;
2296 case 0x2f: /* Informational exceptions log page */
2297 arr[3] = resp_ie_l_pg(arr + 4);
2298 break;
2299 default:
22017ed2 2300 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
23183910
DG		 2301 return check_condition_result;
2302 }
2303 } else if (0xff == subpcode) {
2304 arr[0] |= 0x40;
2305 arr[1] = subpcode;
2306 switch (pcode) {
2307 case 0x0: /* Supported log pages and subpages log page */
2308 n = 4;
2309 arr[n++] = 0x0;
2310 arr[n++] = 0x0; /* 0,0 page */
2311 arr[n++] = 0x0;
2312 arr[n++] = 0xff; /* this page */
2313 arr[n++] = 0xd;
2314 arr[n++] = 0x0; /* Temperature */
2315 arr[n++] = 0x2f;
2316 arr[n++] = 0x0; /* Informational exceptions */
2317 arr[3] = n - 4;
2318 break;
2319 case 0xd: /* Temperature subpages */
2320 n = 4;
2321 arr[n++] = 0xd;
2322 arr[n++] = 0x0; /* Temperature */
2323 arr[3] = n - 4;
2324 break;
2325 case 0x2f: /* Informational exceptions subpages */
2326 n = 4;
2327 arr[n++] = 0x2f;
2328 arr[n++] = 0x0; /* Informational exceptions */
2329 arr[3] = n - 4;
2330 break;
2331 default:
22017ed2 2332 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
23183910
DG		 2333 return check_condition_result;
2334 }
2335 } else {
22017ed2 2336 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
c65b1445
DG		 2337 return check_condition_result;
2338 }
2339 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
2340 return fill_from_dev_buffer(scp, arr,
2341 min(len, SDEBUG_MAX_INQ_ARR_SZ));
2342}
2343
cbf67842 2344static int check_device_access_params(struct scsi_cmnd *scp,
19789100 2345 unsigned long long lba, unsigned int num)
1da177e4 2346{
c65b1445 2347 if (lba + num > sdebug_capacity) {
22017ed2 2348 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
1da177e4
LT		 2349 return check_condition_result;
2350 }
c65b1445
DG		 2351 /* transfer length excessive (tie in to block limits VPD page) */
2352 if (num > sdebug_store_sectors) {
22017ed2 2353 /* needs work to find which cdb byte 'num' comes from */
cbf67842 2354 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
c65b1445
DG		 2355 return check_condition_result;
2356 }
19789100
FT		 2357 return 0;
2358}
2359
a4517511 2360/* Returns number of bytes copied or -1 if error. */
c2248fc9
DG		 2361static int
2362do_device_access(struct scsi_cmnd *scmd, u64 lba, u32 num, bool do_write)
19789100
FT		 2363{
2364 int ret;
c2248fc9 2365 u64 block, rest = 0;
a4517511
AM		 2366 struct scsi_data_buffer *sdb;
2367 enum dma_data_direction dir;
a4517511 2368
c2248fc9 2369 if (do_write) {
a4517511
AM		 2370 sdb = scsi_out(scmd);
2371 dir = DMA_TO_DEVICE;
a4517511
AM		 2372 } else {
2373 sdb = scsi_in(scmd);
2374 dir = DMA_FROM_DEVICE;
a4517511 2375 }
19789100 2376
a4517511
AM		 2377 if (!sdb->length)
2378 return 0;
2379 if (!(scsi_bidi_cmnd(scmd) || scmd->sc_data_direction == dir))
2380 return -1;
19789100
FT		 2381
2382 block = do_div(lba, sdebug_store_sectors);
2383 if (block + num > sdebug_store_sectors)
2384 rest = block + num - sdebug_store_sectors;
2385
386ecb12 2386 ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
a4517511 2387 fake_storep + (block * scsi_debug_sector_size),
386ecb12 2388 (num - rest) * scsi_debug_sector_size, 0, do_write);
a4517511
AM		 2389 if (ret != (num - rest) * scsi_debug_sector_size)
2390 return ret;
2391
2392 if (rest) {
386ecb12 2393 ret += sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
a4517511 2394 fake_storep, rest * scsi_debug_sector_size,
386ecb12 2395 (num - rest) * scsi_debug_sector_size, do_write);
a4517511 2396 }
19789100
FT		 2397
2398 return ret;
2399}
2400
38d5c833
DG		 2401/* If fake_store(lba,num) compares equal to arr(num), then copy top half of
2402 * arr into fake_store(lba,num) and return true. If comparison fails then
2403 * return false. */
2404static bool
2405comp_write_worker(u64 lba, u32 num, const u8 *arr)
2406{
2407 bool res;
2408 u64 block, rest = 0;
2409 u32 store_blks = sdebug_store_sectors;
2410 u32 lb_size = scsi_debug_sector_size;
2411
2412 block = do_div(lba, store_blks);
2413 if (block + num > store_blks)
2414 rest = block + num - store_blks;
2415
2416 res = !memcmp(fake_storep + (block * lb_size), arr,
2417 (num - rest) * lb_size);
2418 if (!res)
2419 return res;
2420 if (rest)
2421 res = memcmp(fake_storep, arr + ((num - rest) * lb_size),
2422 rest * lb_size);
2423 if (!res)
2424 return res;
2425 arr += num * lb_size;
2426 memcpy(fake_storep + (block * lb_size), arr, (num - rest) * lb_size);
2427 if (rest)
2428 memcpy(fake_storep, arr + ((num - rest) * lb_size),
2429 rest * lb_size);
2430 return res;
2431}
2432
51d648af 2433static __be16 dif_compute_csum(const void *buf, int len)
beb40ea4 2434{
51d648af 2435 __be16 csum;
beb40ea4 2436
51d648af
AM		 2437 if (scsi_debug_guard)
2438 csum = (__force __be16)ip_compute_csum(buf, len);
2439 else
beb40ea4 2440 csum = cpu_to_be16(crc_t10dif(buf, len));
51d648af 2441
beb40ea4
AM		 2442 return csum;
2443}
2444
2445static int dif_verify(struct sd_dif_tuple *sdt, const void *data,
2446 sector_t sector, u32 ei_lba)
2447{
51d648af 2448 __be16 csum = dif_compute_csum(data, scsi_debug_sector_size);
beb40ea4
AM		 2449
2450 if (sdt->guard_tag != csum) {
c1287970 2451 pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
beb40ea4
AM		 2452 (unsigned long)sector,
2453 be16_to_cpu(sdt->guard_tag),
2454 be16_to_cpu(csum));
2455 return 0x01;
2456 }
2457 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION &&
2458 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
c1287970
TW		 2459 pr_err("REF check failed on sector %lu\n",
2460 (unsigned long)sector);
beb40ea4
AM		 2461 return 0x03;
2462 }
2463 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
2464 be32_to_cpu(sdt->ref_tag) != ei_lba) {
c1287970
TW		 2465 pr_err("REF check failed on sector %lu\n",
2466 (unsigned long)sector);
beb40ea4
AM		 2467 return 0x03;
2468 }
2469 return 0;
2470}
2471
bb8c063c 2472static void dif_copy_prot(struct scsi_cmnd *SCpnt, sector_t sector,
65f72f2a 2473 unsigned int sectors, bool read)
c6a44287 2474{
be4e11be 2475 size_t resid;
c6a44287 2476 void *paddr;
14faa944 2477 const void *dif_store_end = dif_storep + sdebug_store_sectors;
be4e11be 2478 struct sg_mapping_iter miter;
c6a44287 2479
e18d8bea
AM		 2480 /* Bytes of protection data to copy into sgl */
2481 resid = sectors * sizeof(*dif_storep);
c6a44287 2482
be4e11be
AM		 2483 sg_miter_start(&miter, scsi_prot_sglist(SCpnt),
2484 scsi_prot_sg_count(SCpnt), SG_MITER_ATOMIC |
2485 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
2486
2487 while (sg_miter_next(&miter) && resid > 0) {
2488 size_t len = min(miter.length, resid);
14faa944 2489 void *start = dif_store(sector);
be4e11be 2490 size_t rest = 0;
14faa944
AM		 2491
2492 if (dif_store_end < start + len)
2493 rest = start + len - dif_store_end;
c6a44287 2494
be4e11be 2495 paddr = miter.addr;
14faa944 2496
65f72f2a
AM		 2497 if (read)
2498 memcpy(paddr, start, len - rest);
2499 else
2500 memcpy(start, paddr, len - rest);
2501
2502 if (rest) {
2503 if (read)
2504 memcpy(paddr + len - rest, dif_storep, rest);
2505 else
2506 memcpy(dif_storep, paddr + len - rest, rest);
2507 }
c6a44287 2508
e18d8bea 2509 sector += len / sizeof(*dif_storep);
c6a44287 2510 resid -= len;
c6a44287 2511 }
be4e11be 2512 sg_miter_stop(&miter);
bb8c063c
AM		 2513}
2514
2515static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
2516 unsigned int sectors, u32 ei_lba)
2517{
2518 unsigned int i;
2519 struct sd_dif_tuple *sdt;
2520 sector_t sector;
2521
c45eabec 2522 for (i = 0; i < sectors; i++, ei_lba++) {
bb8c063c
AM		 2523 int ret;
2524
2525 sector = start_sec + i;
2526 sdt = dif_store(sector);
2527
51d648af 2528 if (sdt->app_tag == cpu_to_be16(0xffff))
bb8c063c
AM		 2529 continue;
2530
2531 ret = dif_verify(sdt, fake_store(sector), sector, ei_lba);
2532 if (ret) {
2533 dif_errors++;
2534 return ret;
2535 }
bb8c063c 2536 }
c6a44287 2537
65f72f2a 2538 dif_copy_prot(SCpnt, start_sec, sectors, true);
c6a44287
MP		 2539 dix_reads++;
2540
2541 return 0;
2542}
2543
c2248fc9
DG		 2544static int
2545resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
19789100 2546{
c2248fc9
DG		 2547 u8 *cmd = scp->cmnd;
2548 u64 lba;
2549 u32 num;
2550 u32 ei_lba;
19789100
FT		 2551 unsigned long iflags;
2552 int ret;
c2248fc9 2553 bool check_prot;
19789100 2554
c2248fc9
DG		 2555 switch (cmd[0]) {
2556 case READ_16:
2557 ei_lba = 0;
2558 lba = get_unaligned_be64(cmd + 2);
2559 num = get_unaligned_be32(cmd + 10);
2560 check_prot = true;
2561 break;
2562 case READ_10:
2563 ei_lba = 0;
2564 lba = get_unaligned_be32(cmd + 2);
2565 num = get_unaligned_be16(cmd + 7);
2566 check_prot = true;
2567 break;
2568 case READ_6:
2569 ei_lba = 0;
2570 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
2571 (u32)(cmd[1] & 0x1f) << 16;
2572 num = (0 == cmd[4]) ? 256 : cmd[4];
2573 check_prot = true;
2574 break;
2575 case READ_12:
2576 ei_lba = 0;
2577 lba = get_unaligned_be32(cmd + 2);
2578 num = get_unaligned_be32(cmd + 6);
2579 check_prot = true;
2580 break;
2581 case XDWRITEREAD_10:
2582 ei_lba = 0;
2583 lba = get_unaligned_be32(cmd + 2);
2584 num = get_unaligned_be16(cmd + 7);
2585 check_prot = false;
2586 break;
2587 default: /* assume READ(32) */
2588 lba = get_unaligned_be64(cmd + 12);
2589 ei_lba = get_unaligned_be32(cmd + 20);
2590 num = get_unaligned_be32(cmd + 28);
2591 check_prot = false;
2592 break;
2593 }
2594 if (check_prot) {
2595 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
2596 (cmd[1] & 0xe0)) {
2597 mk_sense_invalid_opcode(scp);
2598 return check_condition_result;
2599 }
2600 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
2601 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
2602 (cmd[1] & 0xe0) == 0)
2603 sdev_printk(KERN_ERR, scp->device, "Unprotected RD "
2604 "to DIF device\n");
2605 }
2606 if (sdebug_any_injecting_opt) {
2607 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
2608
2609 if (ep->inj_short)
2610 num /= 2;
2611 }
2612
2613 /* inline check_device_access_params() */
2614 if (lba + num > sdebug_capacity) {
2615 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2616 return check_condition_result;
2617 }
2618 /* transfer length excessive (tie in to block limits VPD page) */
2619 if (num > sdebug_store_sectors) {
2620 /* needs work to find which cdb byte 'num' comes from */
2621 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2622 return check_condition_result;
2623 }
19789100 2624
1da177e4 2625 if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) &&
32f7ef73 2626 (lba <= (OPT_MEDIUM_ERR_ADDR + OPT_MEDIUM_ERR_NUM - 1)) &&
c65b1445
DG		 2627 ((lba + num) > OPT_MEDIUM_ERR_ADDR)) {
2628 /* claim unrecoverable read error */
c2248fc9 2629 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
c65b1445 2630 /* set info field and valid bit for fixed descriptor */
c2248fc9
DG		 2631 if (0x70 == (scp->sense_buffer[0] & 0x7f)) {
2632 scp->sense_buffer[0] |= 0x80; /* Valid bit */
32f7ef73
DG		 2633 ret = (lba < OPT_MEDIUM_ERR_ADDR)
2634 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
c2248fc9 2635 put_unaligned_be32(ret, scp->sense_buffer + 3);
c65b1445 2636 }
c2248fc9 2637 scsi_set_resid(scp, scsi_bufflen(scp));
1da177e4
LT		 2638 return check_condition_result;
2639 }
c6a44287 2640
6c78cc06
AM		 2641 read_lock_irqsave(&atomic_rw, iflags);
2642
c6a44287 2643 /* DIX + T10 DIF */
c2248fc9
DG		 2644 if (scsi_debug_dix && scsi_prot_sg_count(scp)) {
2645 int prot_ret = prot_verify_read(scp, lba, num, ei_lba);
c6a44287
MP		 2646
2647 if (prot_ret) {
6c78cc06 2648 read_unlock_irqrestore(&atomic_rw, iflags);
c2248fc9 2649 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, prot_ret);
c6a44287
MP		 2650 return illegal_condition_result;
2651 }
2652 }
2653
c2248fc9 2654 ret = do_device_access(scp, lba, num, false);
1da177e4 2655 read_unlock_irqrestore(&atomic_rw, iflags);
a4517511
AM		 2656 if (ret == -1)
2657 return DID_ERROR << 16;
2658
c2248fc9 2659 scsi_in(scp)->resid = scsi_bufflen(scp) - ret;
a4517511 2660
c2248fc9
DG		 2661 if (sdebug_any_injecting_opt) {
2662 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
2663
2664 if (ep->inj_recovered) {
2665 mk_sense_buffer(scp, RECOVERED_ERROR,
2666 THRESHOLD_EXCEEDED, 0);
2667 return check_condition_result;
2668 } else if (ep->inj_transport) {
2669 mk_sense_buffer(scp, ABORTED_COMMAND,
2670 TRANSPORT_PROBLEM, ACK_NAK_TO);
2671 return check_condition_result;
2672 } else if (ep->inj_dif) {
2673 /* Logical block guard check failed */
2674 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
2675 return illegal_condition_result;
2676 } else if (ep->inj_dix) {
2677 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
2678 return illegal_condition_result;
2679 }
2680 }
a4517511 2681 return 0;
1da177e4
LT		 2682}
2683
58a8635d 2684static void dump_sector(unsigned char *buf, int len)
c6a44287 2685{
cbf67842 2686 int i, j, n;
c6a44287 2687
cbf67842 2688 pr_err(">>> Sector Dump <<<\n");
c6a44287 2689 for (i = 0 ; i < len ; i += 16) {
cbf67842 2690 char b[128];
c6a44287 2691
cbf67842 2692 for (j = 0, n = 0; j < 16; j++) {
c6a44287 2693 unsigned char c = buf[i+j];
cbf67842 2694
c6a44287 2695 if (c >= 0x20 && c < 0x7e)
cbf67842
DG		 2696 n += scnprintf(b + n, sizeof(b) - n,
2697 " %c ", buf[i+j]);
c6a44287 2698 else
cbf67842
DG		 2699 n += scnprintf(b + n, sizeof(b) - n,
2700 "%02x ", buf[i+j]);
c6a44287 2701 }
cbf67842 2702 pr_err("%04d: %s\n", i, b);
c6a44287
MP		 2703 }
2704}
2705
2706static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
395cef03 2707 unsigned int sectors, u32 ei_lba)
c6a44287 2708{
be4e11be 2709 int ret;
c6a44287 2710 struct sd_dif_tuple *sdt;
be4e11be 2711 void *daddr;
65f72f2a 2712 sector_t sector = start_sec;
c6a44287 2713 int ppage_offset;
be4e11be
AM		 2714 int dpage_offset;
2715 struct sg_mapping_iter diter;
2716 struct sg_mapping_iter piter;
c6a44287 2717
c6a44287
MP		 2718 BUG_ON(scsi_sg_count(SCpnt) == 0);
2719 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
2720
be4e11be
AM		 2721 sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
2722 scsi_prot_sg_count(SCpnt),
2723 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
2724 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
2725 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
2726
2727 /* For each protection page */
2728 while (sg_miter_next(&piter)) {
2729 dpage_offset = 0;
2730 if (WARN_ON(!sg_miter_next(&diter))) {
2731 ret = 0x01;
2732 goto out;
2733 }
c6a44287 2734
be4e11be
AM		 2735 for (ppage_offset = 0; ppage_offset < piter.length;
2736 ppage_offset += sizeof(struct sd_dif_tuple)) {
c6a44287 2737 /* If we're at the end of the current
be4e11be 2738 * data page advance to the next one
c6a44287 2739 */
be4e11be
AM		 2740 if (dpage_offset >= diter.length) {
2741 if (WARN_ON(!sg_miter_next(&diter))) {
2742 ret = 0x01;
2743 goto out;
2744 }
2745 dpage_offset = 0;
c6a44287
MP		 2746 }
2747
be4e11be
AM		 2748 sdt = piter.addr + ppage_offset;
2749 daddr = diter.addr + dpage_offset;
c6a44287 2750
be4e11be 2751 ret = dif_verify(sdt, daddr, sector, ei_lba);
beb40ea4 2752 if (ret) {
be4e11be 2753 dump_sector(daddr, scsi_debug_sector_size);
395cef03
MP		 2754 goto out;
2755 }
2756
c6a44287 2757 sector++;
395cef03 2758 ei_lba++;
be4e11be 2759 dpage_offset += scsi_debug_sector_size;
c6a44287 2760 }
be4e11be
AM		 2761 diter.consumed = dpage_offset;
2762 sg_miter_stop(&diter);
c6a44287 2763 }
be4e11be 2764 sg_miter_stop(&piter);
c6a44287 2765
65f72f2a 2766 dif_copy_prot(SCpnt, start_sec, sectors, false);
c6a44287
MP		 2767 dix_writes++;
2768
2769 return 0;
2770
2771out:
2772 dif_errors++;
be4e11be
AM		 2773 sg_miter_stop(&diter);
2774 sg_miter_stop(&piter);
c6a44287
MP		 2775 return ret;
2776}
2777
b90ebc3d
AM		 2778static unsigned long lba_to_map_index(sector_t lba)
2779{
2780 if (scsi_debug_unmap_alignment) {
2781 lba += scsi_debug_unmap_granularity -
2782 scsi_debug_unmap_alignment;
2783 }
49413112 2784 sector_div(lba, scsi_debug_unmap_granularity);
b90ebc3d
AM		 2785
2786 return lba;
2787}
2788
2789static sector_t map_index_to_lba(unsigned long index)
44d92694 2790{
a027b5b9
AM		 2791 sector_t lba = index * scsi_debug_unmap_granularity;
2792
2793 if (scsi_debug_unmap_alignment) {
2794 lba -= scsi_debug_unmap_granularity -
2795 scsi_debug_unmap_alignment;
2796 }
2797
2798 return lba;
b90ebc3d 2799}
44d92694 2800
b90ebc3d
AM		 2801static unsigned int map_state(sector_t lba, unsigned int *num)
2802{
2803 sector_t end;
2804 unsigned int mapped;
2805 unsigned long index;
2806 unsigned long next;
44d92694 2807
b90ebc3d
AM		 2808 index = lba_to_map_index(lba);
2809 mapped = test_bit(index, map_storep);
44d92694
MP		 2810
2811 if (mapped)
b90ebc3d 2812 next = find_next_zero_bit(map_storep, map_size, index);
44d92694 2813 else
b90ebc3d 2814 next = find_next_bit(map_storep, map_size, index);
44d92694 2815
b90ebc3d 2816 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
44d92694
MP		 2817 *num = end - lba;
2818
2819 return mapped;
2820}
2821
2822static void map_region(sector_t lba, unsigned int len)
2823{
44d92694
MP		 2824 sector_t end = lba + len;
2825
44d92694 2826 while (lba < end) {
b90ebc3d 2827 unsigned long index = lba_to_map_index(lba);
44d92694 2828
b90ebc3d
AM		 2829 if (index < map_size)
2830 set_bit(index, map_storep);
44d92694 2831
b90ebc3d 2832 lba = map_index_to_lba(index + 1);
44d92694
MP		 2833 }
2834}
2835
2836static void unmap_region(sector_t lba, unsigned int len)
2837{
44d92694
MP		 2838 sector_t end = lba + len;
2839
44d92694 2840 while (lba < end) {
b90ebc3d 2841 unsigned long index = lba_to_map_index(lba);
44d92694 2842
b90ebc3d
AM		 2843 if (lba == map_index_to_lba(index) &&
2844 lba + scsi_debug_unmap_granularity <= end &&
2845 index < map_size) {
2846 clear_bit(index, map_storep);
2847 if (scsi_debug_lbprz) {
be1dd78d 2848 memset(fake_storep +
cc34a8e6
AM		 2849 lba * scsi_debug_sector_size, 0,
2850 scsi_debug_sector_size *
2851 scsi_debug_unmap_granularity);
b90ebc3d 2852 }
e9926b43
AM		 2853 if (dif_storep) {
2854 memset(dif_storep + lba, 0xff,
2855 sizeof(*dif_storep) *
2856 scsi_debug_unmap_granularity);
2857 }
be1dd78d 2858 }
b90ebc3d 2859 lba = map_index_to_lba(index + 1);
44d92694
MP		 2860 }
2861}
2862
c2248fc9
DG		 2863static int
2864resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1da177e4 2865{
c2248fc9
DG		 2866 u8 *cmd = scp->cmnd;
2867 u64 lba;
2868 u32 num;
2869 u32 ei_lba;
1da177e4 2870 unsigned long iflags;
19789100 2871 int ret;
c2248fc9 2872 bool check_prot;
1da177e4 2873
c2248fc9
DG		 2874 switch (cmd[0]) {
2875 case WRITE_16:
2876 ei_lba = 0;
2877 lba = get_unaligned_be64(cmd + 2);
2878 num = get_unaligned_be32(cmd + 10);
2879 check_prot = true;
2880 break;
2881 case WRITE_10:
2882 ei_lba = 0;
2883 lba = get_unaligned_be32(cmd + 2);
2884 num = get_unaligned_be16(cmd + 7);
2885 check_prot = true;
2886 break;
2887 case WRITE_6:
2888 ei_lba = 0;
2889 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
2890 (u32)(cmd[1] & 0x1f) << 16;
2891 num = (0 == cmd[4]) ? 256 : cmd[4];
2892 check_prot = true;
2893 break;
2894 case WRITE_12:
2895 ei_lba = 0;
2896 lba = get_unaligned_be32(cmd + 2);
2897 num = get_unaligned_be32(cmd + 6);
2898 check_prot = true;
2899 break;
2900 case 0x53: /* XDWRITEREAD(10) */
2901 ei_lba = 0;
2902 lba = get_unaligned_be32(cmd + 2);
2903 num = get_unaligned_be16(cmd + 7);
2904 check_prot = false;
2905 break;
2906 default: /* assume WRITE(32) */
2907 lba = get_unaligned_be64(cmd + 12);
2908 ei_lba = get_unaligned_be32(cmd + 20);
2909 num = get_unaligned_be32(cmd + 28);
2910 check_prot = false;
2911 break;
2912 }
2913 if (check_prot) {
2914 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
2915 (cmd[1] & 0xe0)) {
2916 mk_sense_invalid_opcode(scp);
2917 return check_condition_result;
2918 }
2919 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
2920 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
2921 (cmd[1] & 0xe0) == 0)
2922 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
2923 "to DIF device\n");
2924 }
2925
2926 /* inline check_device_access_params() */
2927 if (lba + num > sdebug_capacity) {
2928 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2929 return check_condition_result;
2930 }
2931 /* transfer length excessive (tie in to block limits VPD page) */
2932 if (num > sdebug_store_sectors) {
2933 /* needs work to find which cdb byte 'num' comes from */
2934 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2935 return check_condition_result;
2936 }
1da177e4 2937
6c78cc06
AM		 2938 write_lock_irqsave(&atomic_rw, iflags);
2939
c6a44287 2940 /* DIX + T10 DIF */
c2248fc9
DG		 2941 if (scsi_debug_dix && scsi_prot_sg_count(scp)) {
2942 int prot_ret = prot_verify_write(scp, lba, num, ei_lba);
c6a44287
MP		 2943
2944 if (prot_ret) {
6c78cc06 2945 write_unlock_irqrestore(&atomic_rw, iflags);
c2248fc9 2946 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, prot_ret);
c6a44287
MP		 2947 return illegal_condition_result;
2948 }
2949 }
2950
c2248fc9 2951 ret = do_device_access(scp, lba, num, true);
9ed8d3dc 2952 if (scsi_debug_lbp())
44d92694 2953 map_region(lba, num);
1da177e4 2954 write_unlock_irqrestore(&atomic_rw, iflags);
19789100 2955 if (-1 == ret)
1da177e4 2956 return (DID_ERROR << 16);
597136ab 2957 else if ((ret < (num * scsi_debug_sector_size)) &&
1da177e4 2958 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
c2248fc9 2959 sdev_printk(KERN_INFO, scp->device,
cbf67842
DG		 2960 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
2961 my_name, num * scsi_debug_sector_size, ret);
44d92694 2962
c2248fc9
DG		 2963 if (sdebug_any_injecting_opt) {
2964 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
2965
2966 if (ep->inj_recovered) {
2967 mk_sense_buffer(scp, RECOVERED_ERROR,
2968 THRESHOLD_EXCEEDED, 0);
2969 return check_condition_result;
2970 } else if (ep->inj_dif) {
2971 /* Logical block guard check failed */
2972 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
2973 return illegal_condition_result;
2974 } else if (ep->inj_dix) {
2975 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
2976 return illegal_condition_result;
2977 }
2978 }
44d92694
MP		 2979 return 0;
2980}
2981
c2248fc9
DG		 2982static int
2983resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num, u32 ei_lba,
2984 bool unmap, bool ndob)
44d92694
MP		 2985{
2986 unsigned long iflags;
2987 unsigned long long i;
2988 int ret;
2989
c2248fc9 2990 ret = check_device_access_params(scp, lba, num);
44d92694
MP		 2991 if (ret)
2992 return ret;
2993
2994 write_lock_irqsave(&atomic_rw, iflags);
2995
9ed8d3dc 2996 if (unmap && scsi_debug_lbp()) {
44d92694
MP		 2997 unmap_region(lba, num);
2998 goto out;
2999 }
3000
c2248fc9
DG		 3001 /* if ndob then zero 1 logical block, else fetch 1 logical block */
3002 if (ndob) {
3003 memset(fake_storep + (lba * scsi_debug_sector_size), 0,
3004 scsi_debug_sector_size);
3005 ret = 0;
3006 } else
3007 ret = fetch_to_dev_buffer(scp, fake_storep +
3008 (lba * scsi_debug_sector_size),
3009 scsi_debug_sector_size);
44d92694
MP		 3010
3011 if (-1 == ret) {
3012 write_unlock_irqrestore(&atomic_rw, iflags);
3013 return (DID_ERROR << 16);
3014 } else if ((ret < (num * scsi_debug_sector_size)) &&
3015 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
c2248fc9 3016 sdev_printk(KERN_INFO, scp->device,
cbf67842
DG		 3017 "%s: %s: cdb indicated=%u, IO sent=%d bytes\n",
3018 my_name, "write same",
3019 num * scsi_debug_sector_size, ret);
44d92694
MP		 3020
3021 /* Copy first sector to remaining blocks */
3022 for (i = 1 ; i < num ; i++)
3023 memcpy(fake_storep + ((lba + i) * scsi_debug_sector_size),
3024 fake_storep + (lba * scsi_debug_sector_size),
3025 scsi_debug_sector_size);
3026
9ed8d3dc 3027 if (scsi_debug_lbp())
44d92694
MP		 3028 map_region(lba, num);
3029out:
3030 write_unlock_irqrestore(&atomic_rw, iflags);
3031
1da177e4
LT		 3032 return 0;
3033}
3034
c2248fc9
DG		 3035static int
3036resp_write_same_10(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3037{
3038 u8 *cmd = scp->cmnd;
3039 u32 lba;
3040 u16 num;
3041 u32 ei_lba = 0;
3042 bool unmap = false;
3043
3044 if (cmd[1] & 0x8) {
3045 if (scsi_debug_lbpws10 == 0) {
3046 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3047 return check_condition_result;
3048 } else
3049 unmap = true;
3050 }
3051 lba = get_unaligned_be32(cmd + 2);
3052 num = get_unaligned_be16(cmd + 7);
3053 if (num > scsi_debug_write_same_length) {
3054 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3055 return check_condition_result;
3056 }
3057 return resp_write_same(scp, lba, num, ei_lba, unmap, false);
3058}
3059
3060static int
3061resp_write_same_16(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3062{
3063 u8 *cmd = scp->cmnd;
3064 u64 lba;
3065 u32 num;
3066 u32 ei_lba = 0;
3067 bool unmap = false;
3068 bool ndob = false;
3069
3070 if (cmd[1] & 0x8) { /* UNMAP */
3071 if (scsi_debug_lbpws == 0) {
3072 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3073 return check_condition_result;
3074 } else
3075 unmap = true;
3076 }
3077 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */
3078 ndob = true;
3079 lba = get_unaligned_be64(cmd + 2);
3080 num = get_unaligned_be32(cmd + 10);
3081 if (num > scsi_debug_write_same_length) {
3082 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
3083 return check_condition_result;
3084 }
3085 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob);
3086}
3087
acafd0b9
EM		 3088/* Note the mode field is in the same position as the (lower) service action
3089 * field. For the Report supported operation codes command, SPC-4 suggests
3090 * each mode of this command should be reported separately; for future. */
3091static int
3092resp_write_buffer(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3093{
3094 u8 *cmd = scp->cmnd;
3095 struct scsi_device *sdp = scp->device;
3096 struct sdebug_dev_info *dp;
3097 u8 mode;
3098
3099 mode = cmd[1] & 0x1f;
3100 switch (mode) {
3101 case 0x4: /* download microcode (MC) and activate (ACT) */
3102 /* set UAs on this device only */
3103 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3104 set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm);
3105 break;
3106 case 0x5: /* download MC, save and ACT */
3107 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm);
3108 break;
3109 case 0x6: /* download MC with offsets and ACT */
3110 /* set UAs on most devices (LUs) in this target */
3111 list_for_each_entry(dp,
3112 &devip->sdbg_host->dev_info_list,
3113 dev_list)
3114 if (dp->target == sdp->id) {
3115 set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm);
3116 if (devip != dp)
3117 set_bit(SDEBUG_UA_MICROCODE_CHANGED,
3118 dp->uas_bm);
3119 }
3120 break;
3121 case 0x7: /* download MC with offsets, save, and ACT */
3122 /* set UA on all devices (LUs) in this target */
3123 list_for_each_entry(dp,
3124 &devip->sdbg_host->dev_info_list,
3125 dev_list)
3126 if (dp->target == sdp->id)
3127 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET,
3128 dp->uas_bm);
3129 break;
3130 default:
3131 /* do nothing for this command for other mode values */
3132 break;
3133 }
3134 return 0;
3135}
3136
38d5c833
DG		 3137static int
3138resp_comp_write(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3139{
3140 u8 *cmd = scp->cmnd;
3141 u8 *arr;
3142 u8 *fake_storep_hold;
3143 u64 lba;
3144 u32 dnum;
3145 u32 lb_size = scsi_debug_sector_size;
3146 u8 num;
3147 unsigned long iflags;
3148 int ret;
d467d31f 3149 int retval = 0;
38d5c833 3150
d467d31f 3151 lba = get_unaligned_be64(cmd + 2);
38d5c833
DG		 3152 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */
3153 if (0 == num)
3154 return 0; /* degenerate case, not an error */
38d5c833
DG		 3155 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
3156 (cmd[1] & 0xe0)) {
3157 mk_sense_invalid_opcode(scp);
3158 return check_condition_result;
3159 }
3160 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
3161 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
3162 (cmd[1] & 0xe0) == 0)
3163 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3164 "to DIF device\n");
3165
3166 /* inline check_device_access_params() */
3167 if (lba + num > sdebug_capacity) {
3168 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
3169 return check_condition_result;
3170 }
3171 /* transfer length excessive (tie in to block limits VPD page) */
3172 if (num > sdebug_store_sectors) {
3173 /* needs work to find which cdb byte 'num' comes from */
3174 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3175 return check_condition_result;
3176 }
d467d31f
DG		 3177 dnum = 2 * num;
3178 arr = kzalloc(dnum * lb_size, GFP_ATOMIC);
3179 if (NULL == arr) {
3180 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3181 INSUFF_RES_ASCQ);
3182 return check_condition_result;
3183 }
38d5c833
DG		 3184
3185 write_lock_irqsave(&atomic_rw, iflags);
3186
3187 /* trick do_device_access() to fetch both compare and write buffers
3188 * from data-in into arr. Safe (atomic) since write_lock held. */
3189 fake_storep_hold = fake_storep;
3190 fake_storep = arr;
3191 ret = do_device_access(scp, 0, dnum, true);
3192 fake_storep = fake_storep_hold;
3193 if (ret == -1) {
d467d31f
DG		 3194 retval = DID_ERROR << 16;
3195 goto cleanup;
38d5c833
DG		 3196 } else if ((ret < (dnum * lb_size)) &&
3197 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
3198 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb "
3199 "indicated=%u, IO sent=%d bytes\n", my_name,
3200 dnum * lb_size, ret);
3201 if (!comp_write_worker(lba, num, arr)) {
38d5c833 3202 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
d467d31f
DG		 3203 retval = check_condition_result;
3204 goto cleanup;
38d5c833
DG		 3205 }
3206 if (scsi_debug_lbp())
3207 map_region(lba, num);
d467d31f 3208cleanup:
38d5c833 3209 write_unlock_irqrestore(&atomic_rw, iflags);
d467d31f
DG		 3210 kfree(arr);
3211 return retval;
38d5c833
DG		 3212}
3213
44d92694
MP		 3214struct unmap_block_desc {
3215 __be64 lba;
3216 __be32 blocks;
3217 __be32 __reserved;
3218};
3219
c2248fc9
DG		 3220static int
3221resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
44d92694
MP		 3222{
3223 unsigned char *buf;
3224 struct unmap_block_desc *desc;
3225 unsigned int i, payload_len, descriptors;
3226 int ret;
6c78cc06 3227 unsigned long iflags;
44d92694 3228
44d92694 3229
c2248fc9
DG		 3230 if (!scsi_debug_lbp())
3231 return 0; /* fib and say its done */
3232 payload_len = get_unaligned_be16(scp->cmnd + 7);
3233 BUG_ON(scsi_bufflen(scp) != payload_len);
44d92694
MP		 3234
3235 descriptors = (payload_len - 8) / 16;
c2248fc9
DG		 3236 if (descriptors > scsi_debug_unmap_max_desc) {
3237 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3238 return check_condition_result;
3239 }
44d92694 3240
c2248fc9
DG		 3241 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
3242 if (!buf) {
3243 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3244 INSUFF_RES_ASCQ);
44d92694 3245 return check_condition_result;
c2248fc9 3246 }
44d92694 3247
c2248fc9 3248 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
44d92694
MP		 3249
3250 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
3251 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
3252
3253 desc = (void *)&buf[8];
3254
6c78cc06
AM		 3255 write_lock_irqsave(&atomic_rw, iflags);
3256
44d92694
MP		 3257 for (i = 0 ; i < descriptors ; i++) {
3258 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
3259 unsigned int num = get_unaligned_be32(&desc[i].blocks);
3260
c2248fc9 3261 ret = check_device_access_params(scp, lba, num);
44d92694
MP		 3262 if (ret)
3263 goto out;
3264
3265 unmap_region(lba, num);
3266 }
3267
3268 ret = 0;
3269
3270out:
6c78cc06 3271 write_unlock_irqrestore(&atomic_rw, iflags);
44d92694
MP		 3272 kfree(buf);
3273
3274 return ret;
3275}
3276
3277#define SDEBUG_GET_LBA_STATUS_LEN 32
3278
c2248fc9
DG		 3279static int
3280resp_get_lba_status(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
44d92694 3281{
c2248fc9
DG		 3282 u8 *cmd = scp->cmnd;
3283 u64 lba;
3284 u32 alloc_len, mapped, num;
3285 u8 arr[SDEBUG_GET_LBA_STATUS_LEN];
44d92694
MP		 3286 int ret;
3287
c2248fc9
DG		 3288 lba = get_unaligned_be64(cmd + 2);
3289 alloc_len = get_unaligned_be32(cmd + 10);
44d92694
MP		 3290
3291 if (alloc_len < 24)
3292 return 0;
3293
c2248fc9 3294 ret = check_device_access_params(scp, lba, 1);
44d92694
MP		 3295 if (ret)
3296 return ret;
3297
c2248fc9
DG		 3298 if (scsi_debug_lbp())
3299 mapped = map_state(lba, &num);
3300 else {
3301 mapped = 1;
3302 /* following just in case virtual_gb changed */
3303 sdebug_capacity = get_sdebug_capacity();
3304 if (sdebug_capacity - lba <= 0xffffffff)
3305 num = sdebug_capacity - lba;
3306 else
3307 num = 0xffffffff;
3308 }
44d92694
MP		 3309
3310 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
c2248fc9
DG		 3311 put_unaligned_be32(20, arr); /* Parameter Data Length */
3312 put_unaligned_be64(lba, arr + 8); /* LBA */
3313 put_unaligned_be32(num, arr + 16); /* Number of blocks */
3314 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */
44d92694 3315
c2248fc9 3316 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN);
44d92694
MP		 3317}
3318
c65b1445 3319#define SDEBUG_RLUN_ARR_SZ 256
1da177e4
LT		 3320
3321static int resp_report_luns(struct scsi_cmnd * scp,
3322 struct sdebug_dev_info * devip)
3323{
3324 unsigned int alloc_len;
22017ed2
DG		 3325 int lun_cnt, i, upper, num, n, want_wlun, shortish;
3326 u64 lun;
01123ef4 3327 unsigned char *cmd = scp->cmnd;
1da177e4
LT		 3328 int select_report = (int)cmd[2];
3329 struct scsi_lun *one_lun;
3330 unsigned char arr[SDEBUG_RLUN_ARR_SZ];
c65b1445 3331 unsigned char * max_addr;
1da177e4 3332
19c8ead7 3333 clear_luns_changed_on_target(devip);
1da177e4 3334 alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
22017ed2
DG		 3335 shortish = (alloc_len < 4);
3336 if (shortish || (select_report > 2)) {
3337 mk_sense_invalid_fld(scp, SDEB_IN_CDB, shortish ? 6 : 2, -1);
1da177e4
LT		 3338 return check_condition_result;
3339 }
3340 /* can produce response with up to 16k luns (lun 0 to lun 16383) */
3341 memset(arr, 0, SDEBUG_RLUN_ARR_SZ);
3342 lun_cnt = scsi_debug_max_luns;
c65b1445
DG		 3343 if (1 == select_report)
3344 lun_cnt = 0;
3345 else if (scsi_debug_no_lun_0 && (lun_cnt > 0))
3346 --lun_cnt;
22017ed2
DG		 3347 want_wlun = (select_report > 0) ? 1 : 0;
3348 num = lun_cnt + want_wlun;
c65b1445
DG		 3349 arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff;
3350 arr[3] = (sizeof(struct scsi_lun) * num) & 0xff;
3351 n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) /
3352 sizeof(struct scsi_lun)), num);
3353 if (n < num) {
22017ed2 3354 want_wlun = 0;
c65b1445
DG		 3355 lun_cnt = n;
3356 }
1da177e4 3357 one_lun = (struct scsi_lun *) &arr[8];
c65b1445
DG		 3358 max_addr = arr + SDEBUG_RLUN_ARR_SZ;
3359 for (i = 0, lun = (scsi_debug_no_lun_0 ? 1 : 0);
3360 ((i < lun_cnt) && ((unsigned char *)(one_lun + i) < max_addr));
3361 i++, lun++) {
3362 upper = (lun >> 8) & 0x3f;
1da177e4
LT		 3363 if (upper)
3364 one_lun[i].scsi_lun[0] =
3365 (upper | (SAM2_LUN_ADDRESS_METHOD << 6));
c65b1445
DG		 3366 one_lun[i].scsi_lun[1] = lun & 0xff;
3367 }
22017ed2 3368 if (want_wlun) {
34d55434
TW		 3369 one_lun[i].scsi_lun[0] = (SCSI_W_LUN_REPORT_LUNS >> 8) & 0xff;
3370 one_lun[i].scsi_lun[1] = SCSI_W_LUN_REPORT_LUNS & 0xff;
c65b1445 3371 i++;
1da177e4 3372 }
c65b1445 3373 alloc_len = (unsigned char *)(one_lun + i) - arr;
1da177e4
LT		 3374 return fill_from_dev_buffer(scp, arr,
3375 min((int)alloc_len, SDEBUG_RLUN_ARR_SZ));
3376}
3377
c639d14e
FT		 3378static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
3379 unsigned int num, struct sdebug_dev_info *devip)
3380{
be4e11be 3381 int j;
c639d14e
FT		 3382 unsigned char *kaddr, *buf;
3383 unsigned int offset;
c639d14e 3384 struct scsi_data_buffer *sdb = scsi_in(scp);
be4e11be 3385 struct sg_mapping_iter miter;
c639d14e
FT		 3386
3387 /* better not to use temporary buffer. */
3388 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
c5af0db9 3389 if (!buf) {
22017ed2
DG		 3390 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3391 INSUFF_RES_ASCQ);
c5af0db9
AM		 3392 return check_condition_result;
3393 }
c639d14e 3394
21a61829 3395 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
c639d14e
FT		 3396
3397 offset = 0;
be4e11be
AM		 3398 sg_miter_start(&miter, sdb->table.sgl, sdb->table.nents,
3399 SG_MITER_ATOMIC | SG_MITER_TO_SG);
c639d14e 3400
be4e11be
AM		 3401 while (sg_miter_next(&miter)) {
3402 kaddr = miter.addr;
3403 for (j = 0; j < miter.length; j++)
3404 *(kaddr + j) ^= *(buf + offset + j);
c639d14e 3405
be4e11be 3406 offset += miter.length;
c639d14e 3407 }
be4e11be 3408 sg_miter_stop(&miter);
c639d14e
FT		 3409 kfree(buf);
3410
be4e11be 3411 return 0;
c639d14e
FT		 3412}
3413
c2248fc9
DG		 3414static int
3415resp_xdwriteread_10(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3416{
3417 u8 *cmd = scp->cmnd;
3418 u64 lba;
3419 u32 num;
3420 int errsts;
3421
3422 if (!scsi_bidi_cmnd(scp)) {
3423 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3424 INSUFF_RES_ASCQ);
3425 return check_condition_result;
3426 }
3427 errsts = resp_read_dt0(scp, devip);
3428 if (errsts)
3429 return errsts;
3430 if (!(cmd[1] & 0x4)) { /* DISABLE_WRITE is not set */
3431 errsts = resp_write_dt0(scp, devip);
3432 if (errsts)
3433 return errsts;
3434 }
3435 lba = get_unaligned_be32(cmd + 2);
3436 num = get_unaligned_be16(cmd + 7);
3437 return resp_xdwriteread(scp, lba, num, devip);
3438}
3439
cbf67842
DG		 3440/* When timer or tasklet goes off this function is called. */
3441static void sdebug_q_cmd_complete(unsigned long indx)
1da177e4 3442{
cbf67842
DG		 3443 int qa_indx;
3444 int retiring = 0;
1da177e4 3445 unsigned long iflags;
cbf67842
DG		 3446 struct sdebug_queued_cmd *sqcp;
3447 struct scsi_cmnd *scp;
3448 struct sdebug_dev_info *devip;
1da177e4 3449
cbf67842
DG		 3450 atomic_inc(&sdebug_completions);
3451 qa_indx = indx;
3452 if ((qa_indx < 0) || (qa_indx >= SCSI_DEBUG_CANQUEUE)) {
c1287970 3453 pr_err("wild qa_indx=%d\n", qa_indx);
1da177e4
LT		 3454 return;
3455 }
3456 spin_lock_irqsave(&queued_arr_lock, iflags);
cbf67842
DG		 3457 sqcp = &queued_arr[qa_indx];
3458 scp = sqcp->a_cmnd;
3459 if (NULL == scp) {
3460 spin_unlock_irqrestore(&queued_arr_lock, iflags);
c1287970 3461 pr_err("scp is NULL\n");
cbf67842
DG		 3462 return;
3463 }
3464 devip = (struct sdebug_dev_info *)scp->device->hostdata;
3465 if (devip)
3466 atomic_dec(&devip->num_in_q);
3467 else
c1287970 3468 pr_err("devip=NULL\n");
cbf67842
DG		 3469 if (atomic_read(&retired_max_queue) > 0)
3470 retiring = 1;
3471
3472 sqcp->a_cmnd = NULL;
3473 if (!test_and_clear_bit(qa_indx, queued_in_use_bm)) {
1da177e4 3474 spin_unlock_irqrestore(&queued_arr_lock, iflags);
c1287970 3475 pr_err("Unexpected completion\n");
1da177e4
LT		 3476 return;
3477 }
cbf67842
DG		 3478
3479 if (unlikely(retiring)) { /* user has reduced max_queue */
3480 int k, retval;
3481
3482 retval = atomic_read(&retired_max_queue);
3483 if (qa_indx >= retval) {
3484 spin_unlock_irqrestore(&queued_arr_lock, iflags);
c1287970 3485 pr_err("index %d too large\n", retval);
cbf67842
DG		 3486 return;
3487 }
3488 k = find_last_bit(queued_in_use_bm, retval);
3489 if ((k < scsi_debug_max_queue) || (k == retval))
3490 atomic_set(&retired_max_queue, 0);
3491 else
3492 atomic_set(&retired_max_queue, k + 1);
1da177e4 3493 }
1da177e4 3494 spin_unlock_irqrestore(&queued_arr_lock, iflags);
cbf67842 3495 scp->scsi_done(scp); /* callback to mid level */
1da177e4
LT		 3496}
3497
cbf67842
DG		 3498/* When high resolution timer goes off this function is called. */
3499static enum hrtimer_restart
3500sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
3501{
3502 int qa_indx;
3503 int retiring = 0;
3504 unsigned long iflags;
3505 struct sdebug_hrtimer *sd_hrtp = (struct sdebug_hrtimer *)timer;
3506 struct sdebug_queued_cmd *sqcp;
3507 struct scsi_cmnd *scp;
3508 struct sdebug_dev_info *devip;
3509
3510 atomic_inc(&sdebug_completions);
3511 qa_indx = sd_hrtp->qa_indx;
3512 if ((qa_indx < 0) || (qa_indx >= SCSI_DEBUG_CANQUEUE)) {
c1287970 3513 pr_err("wild qa_indx=%d\n", qa_indx);
cbf67842
DG		 3514 goto the_end;
3515 }
3516 spin_lock_irqsave(&queued_arr_lock, iflags);
3517 sqcp = &queued_arr[qa_indx];
3518 scp = sqcp->a_cmnd;
3519 if (NULL == scp) {
3520 spin_unlock_irqrestore(&queued_arr_lock, iflags);
c1287970 3521 pr_err("scp is NULL\n");
cbf67842
DG		 3522 goto the_end;
3523 }
3524 devip = (struct sdebug_dev_info *)scp->device->hostdata;
3525 if (devip)
3526 atomic_dec(&devip->num_in_q);
3527 else
c1287970 3528 pr_err("devip=NULL\n");
cbf67842
DG		 3529 if (atomic_read(&retired_max_queue) > 0)
3530 retiring = 1;
3531
3532 sqcp->a_cmnd = NULL;
3533 if (!test_and_clear_bit(qa_indx, queued_in_use_bm)) {
3534 spin_unlock_irqrestore(&queued_arr_lock, iflags);
c1287970 3535 pr_err("Unexpected completion\n");
cbf67842
DG		 3536 goto the_end;
3537 }
3538
3539 if (unlikely(retiring)) { /* user has reduced max_queue */
3540 int k, retval;
3541
3542 retval = atomic_read(&retired_max_queue);
3543 if (qa_indx >= retval) {
3544 spin_unlock_irqrestore(&queued_arr_lock, iflags);
c1287970 3545 pr_err("index %d too large\n", retval);
cbf67842
DG		 3546 goto the_end;
3547 }
3548 k = find_last_bit(queued_in_use_bm, retval);
3549 if ((k < scsi_debug_max_queue) || (k == retval))
3550 atomic_set(&retired_max_queue, 0);
3551 else
3552 atomic_set(&retired_max_queue, k + 1);
3553 }
3554 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3555 scp->scsi_done(scp); /* callback to mid level */
3556the_end:
3557 return HRTIMER_NORESTART;
3558}
1da177e4 3559
8dea0d02
FT		 3560static struct sdebug_dev_info *
3561sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags)
5cb2fc06
FT		 3562{
3563 struct sdebug_dev_info *devip;
3564
3565 devip = kzalloc(sizeof(*devip), flags);
3566 if (devip) {
3567 devip->sdbg_host = sdbg_host;
3568 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
3569 }
3570 return devip;
3571}
3572
1da177e4
LT		 3573static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev)
3574{
3575 struct sdebug_host_info * sdbg_host;
3576 struct sdebug_dev_info * open_devip = NULL;
3577 struct sdebug_dev_info * devip =
3578 (struct sdebug_dev_info *)sdev->hostdata;
3579
3580 if (devip)
3581 return devip;
d1e4c9c5
FT		 3582 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
3583 if (!sdbg_host) {
c1287970 3584 pr_err("Host info NULL\n");
1da177e4
LT		 3585 return NULL;
3586 }
3587 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
3588 if ((devip->used) && (devip->channel == sdev->channel) &&
3589 (devip->target == sdev->id) &&
3590 (devip->lun == sdev->lun))
3591 return devip;
3592 else {
3593 if ((!devip->used) && (!open_devip))
3594 open_devip = devip;
3595 }
3596 }
5cb2fc06
FT		 3597 if (!open_devip) { /* try and make a new one */
3598 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
3599 if (!open_devip) {
c1287970 3600 pr_err("out of memory at line %d\n", __LINE__);
1da177e4
LT		 3601 return NULL;
3602 }
1da177e4 3603 }
a75869d1
FT		 3604
3605 open_devip->channel = sdev->channel;
3606 open_devip->target = sdev->id;
3607 open_devip->lun = sdev->lun;
3608 open_devip->sdbg_host = sdbg_host;
cbf67842
DG		 3609 atomic_set(&open_devip->num_in_q, 0);
3610 set_bit(SDEBUG_UA_POR, open_devip->uas_bm);
c2248fc9 3611 open_devip->used = true;
a75869d1 3612 return open_devip;
1da177e4
LT		 3613}
3614
8dea0d02 3615static int scsi_debug_slave_alloc(struct scsi_device *sdp)
1da177e4 3616{
8dea0d02 3617 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
c1287970 3618 pr_info("slave_alloc <%u %u %u %llu>\n",
8dea0d02 3619 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
75ad23bc 3620 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue);
8dea0d02
FT		 3621 return 0;
3622}
1da177e4 3623
8dea0d02
FT		 3624static int scsi_debug_slave_configure(struct scsi_device *sdp)
3625{
3626 struct sdebug_dev_info *devip;
a34c4e98 3627
8dea0d02 3628 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
c1287970 3629 pr_info("slave_configure <%u %u %u %llu>\n",
8dea0d02
FT		 3630 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3631 if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN)
3632 sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN;
3633 devip = devInfoReg(sdp);
3634 if (NULL == devip)
3635 return 1; /* no resources, will be marked offline */
c8b09f6f 3636 sdp->hostdata = devip;
6bb5e6e7 3637 blk_queue_max_segment_size(sdp->request_queue, -1U);
78d4e5a0
DG		 3638 if (scsi_debug_no_uld)
3639 sdp->no_uld_attach = 1;
8dea0d02
FT		 3640 return 0;
3641}
3642
3643static void scsi_debug_slave_destroy(struct scsi_device *sdp)
3644{
3645 struct sdebug_dev_info *devip =
3646 (struct sdebug_dev_info *)sdp->hostdata;
a34c4e98 3647
1da177e4 3648 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
c1287970 3649 pr_info("slave_destroy <%u %u %u %llu>\n",
8dea0d02
FT		 3650 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3651 if (devip) {
25985edc 3652 /* make this slot available for re-use */
c2248fc9 3653 devip->used = false;
8dea0d02
FT		 3654 sdp->hostdata = NULL;
3655 }
3656}
3657
cbf67842 3658/* Returns 1 if cmnd found (deletes its timer or tasklet), else returns 0 */
8dea0d02
FT		 3659static int stop_queued_cmnd(struct scsi_cmnd *cmnd)
3660{
3661 unsigned long iflags;
cbf67842 3662 int k, qmax, r_qmax;
8dea0d02 3663 struct sdebug_queued_cmd *sqcp;
cbf67842 3664 struct sdebug_dev_info *devip;
8dea0d02
FT		 3665
3666 spin_lock_irqsave(&queued_arr_lock, iflags);
cbf67842
DG		 3667 qmax = scsi_debug_max_queue;
3668 r_qmax = atomic_read(&retired_max_queue);
3669 if (r_qmax > qmax)
3670 qmax = r_qmax;
3671 for (k = 0; k < qmax; ++k) {
3672 if (test_bit(k, queued_in_use_bm)) {
3673 sqcp = &queued_arr[k];
3674 if (cmnd == sqcp->a_cmnd) {
db525fce
DG		 3675 devip = (struct sdebug_dev_info *)
3676 cmnd->device->hostdata;
3677 if (devip)
3678 atomic_dec(&devip->num_in_q);
3679 sqcp->a_cmnd = NULL;
3680 spin_unlock_irqrestore(&queued_arr_lock,
3681 iflags);
cbf67842
DG		 3682 if (scsi_debug_ndelay > 0) {
3683 if (sqcp->sd_hrtp)
3684 hrtimer_cancel(
3685 &sqcp->sd_hrtp->hrt);
3686 } else if (scsi_debug_delay > 0) {
3687 if (sqcp->cmnd_timerp)
3688 del_timer_sync(
3689 sqcp->cmnd_timerp);
3690 } else if (scsi_debug_delay < 0) {
3691 if (sqcp->tletp)
3692 tasklet_kill(sqcp->tletp);
3693 }
db525fce
DG		 3694 clear_bit(k, queued_in_use_bm);
3695 return 1;
cbf67842 3696 }
8dea0d02
FT		 3697 }
3698 }
3699 spin_unlock_irqrestore(&queued_arr_lock, iflags);
db525fce 3700 return 0;
8dea0d02
FT		 3701}
3702
cbf67842 3703/* Deletes (stops) timers or tasklets of all queued commands */
8dea0d02
FT		 3704static void stop_all_queued(void)
3705{
3706 unsigned long iflags;
3707 int k;
3708 struct sdebug_queued_cmd *sqcp;
cbf67842 3709 struct sdebug_dev_info *devip;
8dea0d02
FT		 3710
3711 spin_lock_irqsave(&queued_arr_lock, iflags);
cbf67842
DG		 3712 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
3713 if (test_bit(k, queued_in_use_bm)) {
3714 sqcp = &queued_arr[k];
3715 if (sqcp->a_cmnd) {
db525fce
DG		 3716 devip = (struct sdebug_dev_info *)
3717 sqcp->a_cmnd->device->hostdata;
3718 if (devip)
3719 atomic_dec(&devip->num_in_q);
3720 sqcp->a_cmnd = NULL;
3721 spin_unlock_irqrestore(&queued_arr_lock,
3722 iflags);
cbf67842
DG		 3723 if (scsi_debug_ndelay > 0) {
3724 if (sqcp->sd_hrtp)
3725 hrtimer_cancel(
3726 &sqcp->sd_hrtp->hrt);
3727 } else if (scsi_debug_delay > 0) {
3728 if (sqcp->cmnd_timerp)
3729 del_timer_sync(
3730 sqcp->cmnd_timerp);
3731 } else if (scsi_debug_delay < 0) {
3732 if (sqcp->tletp)
3733 tasklet_kill(sqcp->tletp);
3734 }
db525fce
DG		 3735 clear_bit(k, queued_in_use_bm);
3736 spin_lock_irqsave(&queued_arr_lock, iflags);
cbf67842 3737 }
8dea0d02
FT		 3738 }
3739 }
3740 spin_unlock_irqrestore(&queued_arr_lock, iflags);
1da177e4
LT		 3741}
3742
cbf67842
DG		 3743/* Free queued command memory on heap */
3744static void free_all_queued(void)
1da177e4 3745{
cbf67842
DG		 3746 unsigned long iflags;
3747 int k;
3748 struct sdebug_queued_cmd *sqcp;
3749
3750 spin_lock_irqsave(&queued_arr_lock, iflags);
3751 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
3752 sqcp = &queued_arr[k];
3753 kfree(sqcp->cmnd_timerp);
3754 sqcp->cmnd_timerp = NULL;
3755 kfree(sqcp->tletp);
3756 sqcp->tletp = NULL;
3757 kfree(sqcp->sd_hrtp);
3758 sqcp->sd_hrtp = NULL;
3759 }
3760 spin_unlock_irqrestore(&queued_arr_lock, iflags);
1da177e4
LT		 3761}
3762
cbf67842 3763static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
1da177e4 3764{
cbf67842
DG		 3765 ++num_aborts;
3766 if (SCpnt) {
3767 if (SCpnt->device &&
3768 (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts))
3769 sdev_printk(KERN_INFO, SCpnt->device, "%s\n",
3770 __func__);
3771 stop_queued_cmnd(SCpnt);
3772 }
3773 return SUCCESS;
1da177e4
LT		 3774}
3775
3776static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
3777{
3778 struct sdebug_dev_info * devip;
3779
1da177e4 3780 ++num_dev_resets;
cbf67842
DG		 3781 if (SCpnt && SCpnt->device) {
3782 struct scsi_device *sdp = SCpnt->device;
3783
3784 if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
3785 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3786 devip = devInfoReg(sdp);
1da177e4 3787 if (devip)
cbf67842
DG		 3788 set_bit(SDEBUG_UA_POR, devip->uas_bm);
3789 }
3790 return SUCCESS;
3791}
3792
3793static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
3794{
3795 struct sdebug_host_info *sdbg_host;
3796 struct sdebug_dev_info *devip;
3797 struct scsi_device *sdp;
3798 struct Scsi_Host *hp;
3799 int k = 0;
3800
3801 ++num_target_resets;
3802 if (!SCpnt)
3803 goto lie;
3804 sdp = SCpnt->device;
3805 if (!sdp)
3806 goto lie;
3807 if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
3808 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3809 hp = sdp->host;
3810 if (!hp)
3811 goto lie;
3812 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
3813 if (sdbg_host) {
3814 list_for_each_entry(devip,
3815 &sdbg_host->dev_info_list,
3816 dev_list)
3817 if (devip->target == sdp->id) {
3818 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3819 ++k;
3820 }
1da177e4 3821 }
cbf67842
DG		 3822 if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
3823 sdev_printk(KERN_INFO, sdp,
3824 "%s: %d device(s) found in target\n", __func__, k);
3825lie:
1da177e4
LT		 3826 return SUCCESS;
3827}
3828
3829static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
3830{
3831 struct sdebug_host_info *sdbg_host;
cbf67842 3832 struct sdebug_dev_info *devip;
1da177e4
LT		 3833 struct scsi_device * sdp;
3834 struct Scsi_Host * hp;
cbf67842 3835 int k = 0;
1da177e4 3836
1da177e4 3837 ++num_bus_resets;
cbf67842
DG		 3838 if (!(SCpnt && SCpnt->device))
3839 goto lie;
3840 sdp = SCpnt->device;
3841 if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
3842 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3843 hp = sdp->host;
3844 if (hp) {
d1e4c9c5 3845 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
1da177e4 3846 if (sdbg_host) {
cbf67842 3847 list_for_each_entry(devip,
1da177e4 3848 &sdbg_host->dev_info_list,
cbf67842
DG		 3849 dev_list) {
3850 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3851 ++k;
3852 }
1da177e4
LT		 3853 }
3854 }
cbf67842
DG		 3855 if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
3856 sdev_printk(KERN_INFO, sdp,
3857 "%s: %d device(s) found in host\n", __func__, k);
3858lie:
1da177e4
LT		 3859 return SUCCESS;
3860}
3861
3862static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
3863{
3864 struct sdebug_host_info * sdbg_host;
cbf67842
DG		 3865 struct sdebug_dev_info *devip;
3866 int k = 0;
1da177e4 3867
1da177e4 3868 ++num_host_resets;
cbf67842
DG		 3869 if ((SCpnt->device) && (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts))
3870 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
1da177e4
LT		 3871 spin_lock(&sdebug_host_list_lock);
3872 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
cbf67842
DG		 3873 list_for_each_entry(devip, &sdbg_host->dev_info_list,
3874 dev_list) {
3875 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3876 ++k;
3877 }
1da177e4
LT		 3878 }
3879 spin_unlock(&sdebug_host_list_lock);
3880 stop_all_queued();
cbf67842
DG		 3881 if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
3882 sdev_printk(KERN_INFO, SCpnt->device,
3883 "%s: %d device(s) found\n", __func__, k);
1da177e4
LT		 3884 return SUCCESS;
3885}
3886
f58b0efb 3887static void __init sdebug_build_parts(unsigned char *ramp,
5f2578e5 3888 unsigned long store_size)
1da177e4
LT		 3889{
3890 struct partition * pp;
3891 int starts[SDEBUG_MAX_PARTS + 2];
3892 int sectors_per_part, num_sectors, k;
3893 int heads_by_sects, start_sec, end_sec;
3894
3895 /* assume partition table already zeroed */
f58b0efb 3896 if ((scsi_debug_num_parts < 1) || (store_size < 1048576))
1da177e4
LT		 3897 return;
3898 if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) {
3899 scsi_debug_num_parts = SDEBUG_MAX_PARTS;
c1287970 3900 pr_warn("reducing partitions to %d\n", SDEBUG_MAX_PARTS);
1da177e4 3901 }
c65b1445 3902 num_sectors = (int)sdebug_store_sectors;
1da177e4
LT		 3903 sectors_per_part = (num_sectors - sdebug_sectors_per)
3904 / scsi_debug_num_parts;
3905 heads_by_sects = sdebug_heads * sdebug_sectors_per;
3906 starts[0] = sdebug_sectors_per;
3907 for (k = 1; k < scsi_debug_num_parts; ++k)
3908 starts[k] = ((k * sectors_per_part) / heads_by_sects)
3909 * heads_by_sects;
3910 starts[scsi_debug_num_parts] = num_sectors;
3911 starts[scsi_debug_num_parts + 1] = 0;
3912
3913 ramp[510] = 0x55; /* magic partition markings */
3914 ramp[511] = 0xAA;
3915 pp = (struct partition *)(ramp + 0x1be);
3916 for (k = 0; starts[k + 1]; ++k, ++pp) {
3917 start_sec = starts[k];
3918 end_sec = starts[k + 1] - 1;
3919 pp->boot_ind = 0;
3920
3921 pp->cyl = start_sec / heads_by_sects;
3922 pp->head = (start_sec - (pp->cyl * heads_by_sects))
3923 / sdebug_sectors_per;
3924 pp->sector = (start_sec % sdebug_sectors_per) + 1;
3925
3926 pp->end_cyl = end_sec / heads_by_sects;
3927 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
3928 / sdebug_sectors_per;
3929 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
3930
150c3544
AM		 3931 pp->start_sect = cpu_to_le32(start_sec);
3932 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
1da177e4
LT		 3933 pp->sys_ind = 0x83; /* plain Linux partition */
3934 }
3935}
3936
cbf67842
DG		 3937static int
3938schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
3939 int scsi_result, int delta_jiff)
1da177e4 3940{
cbf67842 3941 unsigned long iflags;
cd62b7da 3942 int k, num_in_q, qdepth, inject;
cbf67842 3943 struct sdebug_queued_cmd *sqcp = NULL;
299b6c07
TW		 3944 struct scsi_device *sdp;
3945
3946 /* this should never happen */
3947 if (WARN_ON(!cmnd))
3948 return SCSI_MLQUEUE_HOST_BUSY;
cbf67842 3949
299b6c07
TW		 3950 if (NULL == devip) {
3951 pr_warn("called devip == NULL\n");
cbf67842
DG		 3952 /* no particularly good error to report back */
3953 return SCSI_MLQUEUE_HOST_BUSY;
3954 }
299b6c07
TW		 3955
3956 sdp = cmnd->device;
3957
cbf67842
DG		 3958 if ((scsi_result) && (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
3959 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
3960 __func__, scsi_result);
cd62b7da
DG		 3961 if (delta_jiff == 0)
3962 goto respond_in_thread;
1da177e4 3963
cd62b7da 3964 /* schedule the response at a later time if resources permit */
cbf67842
DG		 3965 spin_lock_irqsave(&queued_arr_lock, iflags);
3966 num_in_q = atomic_read(&devip->num_in_q);
3967 qdepth = cmnd->device->queue_depth;
cbf67842 3968 inject = 0;
cd62b7da
DG		 3969 if ((qdepth > 0) && (num_in_q >= qdepth)) {
3970 if (scsi_result) {
3971 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3972 goto respond_in_thread;
3973 } else
3974 scsi_result = device_qfull_result;
3975 } else if ((scsi_debug_every_nth != 0) &&
3976 (SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts) &&
3977 (scsi_result == 0)) {
cbf67842
DG		 3978 if ((num_in_q == (qdepth - 1)) &&
3979 (atomic_inc_return(&sdebug_a_tsf) >=
3980 abs(scsi_debug_every_nth))) {
3981 atomic_set(&sdebug_a_tsf, 0);
3982 inject = 1;
cd62b7da 3983 scsi_result = device_qfull_result;
1da177e4
LT		 3984 }
3985 }
1da177e4 3986
cd62b7da 3987 k = find_first_zero_bit(queued_in_use_bm, scsi_debug_max_queue);
cbf67842 3988 if (k >= scsi_debug_max_queue) {
cbf67842 3989 spin_unlock_irqrestore(&queued_arr_lock, iflags);
cd62b7da
DG		 3990 if (scsi_result)
3991 goto respond_in_thread;
3992 else if (SCSI_DEBUG_OPT_ALL_TSF & scsi_debug_opts)
3993 scsi_result = device_qfull_result;
cbf67842
DG		 3994 if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts)
3995 sdev_printk(KERN_INFO, sdp,
cd62b7da
DG		 3996 "%s: max_queue=%d exceeded, %s\n",
3997 __func__, scsi_debug_max_queue,
3998 (scsi_result ? "status: TASK SET FULL" :
3999 "report: host busy"));
4000 if (scsi_result)
4001 goto respond_in_thread;
4002 else
cbf67842
DG		 4003 return SCSI_MLQUEUE_HOST_BUSY;
4004 }
4005 __set_bit(k, queued_in_use_bm);
4006 atomic_inc(&devip->num_in_q);
4007 sqcp = &queued_arr[k];
4008 sqcp->a_cmnd = cmnd;
4009 cmnd->result = scsi_result;
4010 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4011 if (delta_jiff > 0) {
4012 if (NULL == sqcp->cmnd_timerp) {
4013 sqcp->cmnd_timerp = kmalloc(sizeof(struct timer_list),
4014 GFP_ATOMIC);
4015 if (NULL == sqcp->cmnd_timerp)
4016 return SCSI_MLQUEUE_HOST_BUSY;
4017 init_timer(sqcp->cmnd_timerp);
1da177e4 4018 }
cbf67842
DG		 4019 sqcp->cmnd_timerp->function = sdebug_q_cmd_complete;
4020 sqcp->cmnd_timerp->data = k;
4021 sqcp->cmnd_timerp->expires = get_jiffies_64() + delta_jiff;
4022 add_timer(sqcp->cmnd_timerp);
4023 } else if (scsi_debug_ndelay > 0) {
4024 ktime_t kt = ktime_set(0, scsi_debug_ndelay);
4025 struct sdebug_hrtimer *sd_hp = sqcp->sd_hrtp;
4026
4027 if (NULL == sd_hp) {
4028 sd_hp = kmalloc(sizeof(*sd_hp), GFP_ATOMIC);
4029 if (NULL == sd_hp)
4030 return SCSI_MLQUEUE_HOST_BUSY;
4031 sqcp->sd_hrtp = sd_hp;
4032 hrtimer_init(&sd_hp->hrt, CLOCK_MONOTONIC,
4033 HRTIMER_MODE_REL);
4034 sd_hp->hrt.function = sdebug_q_cmd_hrt_complete;
4035 sd_hp->qa_indx = k;
1da177e4 4036 }
cbf67842
DG		 4037 hrtimer_start(&sd_hp->hrt, kt, HRTIMER_MODE_REL);
4038 } else { /* delay < 0 */
4039 if (NULL == sqcp->tletp) {
4040 sqcp->tletp = kmalloc(sizeof(*sqcp->tletp),
4041 GFP_ATOMIC);
4042 if (NULL == sqcp->tletp)
4043 return SCSI_MLQUEUE_HOST_BUSY;
4044 tasklet_init(sqcp->tletp,
4045 sdebug_q_cmd_complete, k);
4046 }
4047 if (-1 == delta_jiff)
4048 tasklet_hi_schedule(sqcp->tletp);
4049 else
4050 tasklet_schedule(sqcp->tletp);
1da177e4 4051 }
cd62b7da
DG		 4052 if ((SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) &&
4053 (scsi_result == device_qfull_result))
cbf67842
DG		 4054 sdev_printk(KERN_INFO, sdp,
4055 "%s: num_in_q=%d +1, %s%s\n", __func__,
4056 num_in_q, (inject ? "<inject> " : ""),
4057 "status: TASK SET FULL");
4058 return 0;
cd62b7da
DG		 4059
4060respond_in_thread: /* call back to mid-layer using invocation thread */
4061 cmnd->result = scsi_result;
4062 cmnd->scsi_done(cmnd);
4063 return 0;
1da177e4 4064}
cbf67842 4065
23183910
DG		 4066/* Note: The following macros create attribute files in the
4067 /sys/module/scsi_debug/parameters directory. Unfortunately this
4068 driver is unaware of a change and cannot trigger auxiliary actions
4069 as it can when the corresponding attribute in the
4070 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
4071 */
c65b1445 4072module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR);
5b94e232 4073module_param_named(ato, scsi_debug_ato, int, S_IRUGO);
0759c666 4074module_param_named(clustering, scsi_debug_clustering, bool, S_IRUGO | S_IWUSR);
c65b1445
DG		 4075module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR);
4076module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO);
5b94e232
MP		 4077module_param_named(dif, scsi_debug_dif, int, S_IRUGO);
4078module_param_named(dix, scsi_debug_dix, int, S_IRUGO);
c65b1445
DG		 4079module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR);
4080module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR);
23183910 4081module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR);
68aee7ba 4082module_param_named(guard, scsi_debug_guard, uint, S_IRUGO);
cbf67842 4083module_param_named(host_lock, scsi_debug_host_lock, bool, S_IRUGO | S_IWUSR);
5b94e232
MP		 4084module_param_named(lbpu, scsi_debug_lbpu, int, S_IRUGO);
4085module_param_named(lbpws, scsi_debug_lbpws, int, S_IRUGO);
4086module_param_named(lbpws10, scsi_debug_lbpws10, int, S_IRUGO);
be1dd78d 4087module_param_named(lbprz, scsi_debug_lbprz, int, S_IRUGO);
5b94e232 4088module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO);
c65b1445 4089module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR);
78d4e5a0 4090module_param_named(max_queue, scsi_debug_max_queue, int, S_IRUGO | S_IWUSR);
cbf67842 4091module_param_named(ndelay, scsi_debug_ndelay, int, S_IRUGO | S_IWUSR);
c65b1445 4092module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR);
78d4e5a0 4093module_param_named(no_uld, scsi_debug_no_uld, int, S_IRUGO);
c65b1445
DG		 4094module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO);
4095module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR);
5b94e232 4096module_param_named(opt_blks, scsi_debug_opt_blks, int, S_IRUGO);
c65b1445 4097module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR);
5b94e232 4098module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO);
c65b1445 4099module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR);
d986788b 4100module_param_named(removable, scsi_debug_removable, bool, S_IRUGO | S_IWUSR);
c65b1445 4101module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO);
597136ab 4102module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO);
c2248fc9 4103module_param_named(strict, scsi_debug_strict, bool, S_IRUGO | S_IWUSR);
5b94e232
MP		 4104module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO);
4105module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO);
44d92694
MP		 4106module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO);
4107module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, int, S_IRUGO);
5b94e232
MP		 4108module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR);
4109module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int,
4110 S_IRUGO | S_IWUSR);
4111module_param_named(write_same_length, scsi_debug_write_same_length, int,
4112 S_IRUGO | S_IWUSR);
1da177e4
LT		 4113
4114MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
4115MODULE_DESCRIPTION("SCSI debug adapter driver");
4116MODULE_LICENSE("GPL");
4117MODULE_VERSION(SCSI_DEBUG_VERSION);
4118
4119MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
5b94e232 4120MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
0759c666 4121MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
cbf67842 4122MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
c2248fc9 4123MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)");
5b94e232
MP		 4124MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
4125MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
c65b1445 4126MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
beb87c33 4127MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
23183910 4128MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
5b94e232 4129MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
cbf67842 4130MODULE_PARM_DESC(host_lock, "use host_lock around all commands (def=0)");
5b94e232
MP		 4131MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
4132MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
4133MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
be1dd78d 4134MODULE_PARM_DESC(lbprz, "unmapped blocks return 0 on read (def=1)");
5b94e232 4135MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
c65b1445 4136MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
cbf67842
DG		 4137MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
4138MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
c65b1445 4139MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
78d4e5a0 4140MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
1da177e4 4141MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
c65b1445 4142MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
32c5844a 4143MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)");
6f3cbf55 4144MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
5b94e232 4145MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
1da177e4 4146MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
d986788b 4147MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
e46b0344 4148MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=6[SPC-4])");
ea61fca5 4149MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
c2248fc9 4150MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)");
5b94e232
MP		 4151MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
4152MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
6014759c
MP		 4153MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
4154MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
c2248fc9 4155MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)");
5b94e232
MP		 4156MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
4157MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
1da177e4
LT		 4158
4159static char sdebug_info[256];
4160
4161static const char * scsi_debug_info(struct Scsi_Host * shp)
4162{
4163 sprintf(sdebug_info, "scsi_debug, version %s [%s], "
4164 "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION,
4165 scsi_debug_version_date, scsi_debug_dev_size_mb,
4166 scsi_debug_opts);
4167 return sdebug_info;
4168}
4169
cbf67842 4170/* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */
c8ed555a 4171static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer, int length)
1da177e4 4172{
c8ed555a
AV		 4173 char arr[16];
4174 int opts;
4175 int minLen = length > 15 ? 15 : length;
1da177e4 4176
c8ed555a
AV		 4177 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
4178 return -EACCES;
4179 memcpy(arr, buffer, minLen);
4180 arr[minLen] = '\0';
4181 if (1 != sscanf(arr, "%d", &opts))
4182 return -EINVAL;
4183 scsi_debug_opts = opts;
4184 if (scsi_debug_every_nth != 0)
cbf67842 4185 atomic_set(&sdebug_cmnd_count, 0);
c8ed555a
AV		 4186 return length;
4187}
1da177e4 4188
cbf67842
DG		 4189/* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the
4190 * same for each scsi_debug host (if more than one). Some of the counters
4191 * output are not atomics so might be inaccurate in a busy system. */
c8ed555a
AV		 4192static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
4193{
cbf67842
DG		 4194 int f, l;
4195 char b[32];
4196
4197 if (scsi_debug_every_nth > 0)
4198 snprintf(b, sizeof(b), " (curr:%d)",
4199 ((SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts) ?
4200 atomic_read(&sdebug_a_tsf) :
4201 atomic_read(&sdebug_cmnd_count)));
4202 else
4203 b[0] = '\0';
4204
4205 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n"
4206 "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, "
4207 "every_nth=%d%s\n"
4208 "delay=%d, ndelay=%d, max_luns=%d, q_completions=%d\n"
4209 "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n"
4210 "command aborts=%d; RESETs: device=%d, target=%d, bus=%d, "
4211 "host=%d\ndix_reads=%d dix_writes=%d dif_errors=%d "
4212 "usec_in_jiffy=%lu\n",
4213 SCSI_DEBUG_VERSION, scsi_debug_version_date,
4214 scsi_debug_num_tgts, scsi_debug_dev_size_mb, scsi_debug_opts,
4215 scsi_debug_every_nth, b, scsi_debug_delay, scsi_debug_ndelay,
4216 scsi_debug_max_luns, atomic_read(&sdebug_completions),
4217 scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads,
4218 sdebug_sectors_per, num_aborts, num_dev_resets,
4219 num_target_resets, num_bus_resets, num_host_resets,
4220 dix_reads, dix_writes, dif_errors, TICK_NSEC / 1000);
4221
4222 f = find_first_bit(queued_in_use_bm, scsi_debug_max_queue);
4223 if (f != scsi_debug_max_queue) {
4224 l = find_last_bit(queued_in_use_bm, scsi_debug_max_queue);
4225 seq_printf(m, " %s BUSY: first,last bits set: %d,%d\n",
4226 "queued_in_use_bm", f, l);
4227 }
c8ed555a 4228 return 0;
1da177e4
LT		 4229}
4230
82069379 4231static ssize_t delay_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4232{
4233 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay);
4234}
cbf67842 4235/* Returns -EBUSY if delay is being changed and commands are queued */
82069379
AM		 4236static ssize_t delay_store(struct device_driver *ddp, const char *buf,
4237 size_t count)
1da177e4 4238{
cbf67842
DG		 4239 int delay, res;
4240
4241 if ((count > 0) && (1 == sscanf(buf, "%d", &delay))) {
4242 res = count;
4243 if (scsi_debug_delay != delay) {
4244 unsigned long iflags;
4245 int k;
4246
4247 spin_lock_irqsave(&queued_arr_lock, iflags);
4248 k = find_first_bit(queued_in_use_bm,
4249 scsi_debug_max_queue);
4250 if (k != scsi_debug_max_queue)
4251 res = -EBUSY; /* have queued commands */
4252 else {
4253 scsi_debug_delay = delay;
4254 scsi_debug_ndelay = 0;
4255 }
4256 spin_unlock_irqrestore(&queued_arr_lock, iflags);
1da177e4 4257 }
cbf67842 4258 return res;
1da177e4
LT		 4259 }
4260 return -EINVAL;
4261}
82069379 4262static DRIVER_ATTR_RW(delay);
1da177e4 4263
cbf67842
DG		 4264static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
4265{
4266 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ndelay);
4267}
4268/* Returns -EBUSY if ndelay is being changed and commands are queued */
4269/* If > 0 and accepted then scsi_debug_delay is set to DELAY_OVERRIDDEN */
4270static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
4271 size_t count)
4272{
4273 unsigned long iflags;
4274 int ndelay, res, k;
4275
4276 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
4277 (ndelay >= 0) && (ndelay < 1000000000)) {
4278 res = count;
4279 if (scsi_debug_ndelay != ndelay) {
4280 spin_lock_irqsave(&queued_arr_lock, iflags);
4281 k = find_first_bit(queued_in_use_bm,
4282 scsi_debug_max_queue);
4283 if (k != scsi_debug_max_queue)
4284 res = -EBUSY; /* have queued commands */
4285 else {
4286 scsi_debug_ndelay = ndelay;
4287 scsi_debug_delay = ndelay ? DELAY_OVERRIDDEN
4288 : DEF_DELAY;
4289 }
4290 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4291 }
4292 return res;
4293 }
4294 return -EINVAL;
4295}
4296static DRIVER_ATTR_RW(ndelay);
4297
82069379 4298static ssize_t opts_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4299{
4300 return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts);
4301}
4302
82069379
AM		 4303static ssize_t opts_store(struct device_driver *ddp, const char *buf,
4304 size_t count)
1da177e4
LT		 4305{
4306 int opts;
4307 char work[20];
4308
4309 if (1 == sscanf(buf, "%10s", work)) {
48a96876 4310 if (0 == strncasecmp(work,"0x", 2)) {
1da177e4
LT		 4311 if (1 == sscanf(&work[2], "%x", &opts))
4312 goto opts_done;
4313 } else {
4314 if (1 == sscanf(work, "%d", &opts))
4315 goto opts_done;
4316 }
4317 }
4318 return -EINVAL;
4319opts_done:
4320 scsi_debug_opts = opts;
817fd66b
DG		 4321 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
4322 sdebug_any_injecting_opt = true;
4323 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
4324 sdebug_any_injecting_opt = true;
4325 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
4326 sdebug_any_injecting_opt = true;
4327 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
4328 sdebug_any_injecting_opt = true;
4329 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
4330 sdebug_any_injecting_opt = true;
cbf67842
DG		 4331 atomic_set(&sdebug_cmnd_count, 0);
4332 atomic_set(&sdebug_a_tsf, 0);
1da177e4
LT		 4333 return count;
4334}
82069379 4335static DRIVER_ATTR_RW(opts);
1da177e4 4336
82069379 4337static ssize_t ptype_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4338{
4339 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype);
4340}
82069379
AM		 4341static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
4342 size_t count)
1da177e4
LT		 4343{
4344 int n;
4345
4346 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4347 scsi_debug_ptype = n;
4348 return count;
4349 }
4350 return -EINVAL;
4351}
82069379 4352static DRIVER_ATTR_RW(ptype);
1da177e4 4353
82069379 4354static ssize_t dsense_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4355{
4356 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense);
4357}
82069379
AM		 4358static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
4359 size_t count)
1da177e4
LT		 4360{
4361 int n;
4362
4363 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4364 scsi_debug_dsense = n;
4365 return count;
4366 }
4367 return -EINVAL;
4368}
82069379 4369static DRIVER_ATTR_RW(dsense);
1da177e4 4370
82069379 4371static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
23183910
DG		 4372{
4373 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw);
4374}
82069379
AM		 4375static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
4376 size_t count)
23183910
DG		 4377{
4378 int n;
4379
4380 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
cbf67842
DG		 4381 n = (n > 0);
4382 scsi_debug_fake_rw = (scsi_debug_fake_rw > 0);
4383 if (scsi_debug_fake_rw != n) {
4384 if ((0 == n) && (NULL == fake_storep)) {
4385 unsigned long sz =
4386 (unsigned long)scsi_debug_dev_size_mb *
4387 1048576;
4388
4389 fake_storep = vmalloc(sz);
4390 if (NULL == fake_storep) {
c1287970 4391 pr_err("out of memory, 9\n");
cbf67842
DG		 4392 return -ENOMEM;
4393 }
4394 memset(fake_storep, 0, sz);
4395 }
4396 scsi_debug_fake_rw = n;
4397 }
23183910
DG		 4398 return count;
4399 }
4400 return -EINVAL;
4401}
82069379 4402static DRIVER_ATTR_RW(fake_rw);
23183910 4403
82069379 4404static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
c65b1445
DG		 4405{
4406 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0);
4407}
82069379
AM		 4408static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
4409 size_t count)
c65b1445
DG		 4410{
4411 int n;
4412
4413 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4414 scsi_debug_no_lun_0 = n;
4415 return count;
4416 }
4417 return -EINVAL;
4418}
82069379 4419static DRIVER_ATTR_RW(no_lun_0);
c65b1445 4420
82069379 4421static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4422{
4423 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts);
4424}
82069379
AM		 4425static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
4426 size_t count)
1da177e4
LT		 4427{
4428 int n;
4429
4430 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4431 scsi_debug_num_tgts = n;
4432 sdebug_max_tgts_luns();
4433 return count;
4434 }
4435 return -EINVAL;
4436}
82069379 4437static DRIVER_ATTR_RW(num_tgts);
1da177e4 4438
82069379 4439static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4440{
4441 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb);
4442}
82069379 4443static DRIVER_ATTR_RO(dev_size_mb);
1da177e4 4444
82069379 4445static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4446{
4447 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts);
4448}
82069379 4449static DRIVER_ATTR_RO(num_parts);
1da177e4 4450
82069379 4451static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4452{
4453 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth);
4454}
82069379
AM		 4455static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
4456 size_t count)
1da177e4
LT		 4457{
4458 int nth;
4459
4460 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
4461 scsi_debug_every_nth = nth;
cbf67842 4462 atomic_set(&sdebug_cmnd_count, 0);
1da177e4
LT		 4463 return count;
4464 }
4465 return -EINVAL;
4466}
82069379 4467static DRIVER_ATTR_RW(every_nth);
1da177e4 4468
82069379 4469static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4470{
4471 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns);
4472}
82069379
AM		 4473static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
4474 size_t count)
1da177e4
LT		 4475{
4476 int n;
19c8ead7 4477 bool changed;
1da177e4
LT		 4478
4479 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
19c8ead7 4480 changed = (scsi_debug_max_luns != n);
1da177e4
LT		 4481 scsi_debug_max_luns = n;
4482 sdebug_max_tgts_luns();
19c8ead7
EM		 4483 if (changed && (scsi_debug_scsi_level >= 5)) { /* >= SPC-3 */
4484 struct sdebug_host_info *sdhp;
4485 struct sdebug_dev_info *dp;
4486
4487 spin_lock(&sdebug_host_list_lock);
4488 list_for_each_entry(sdhp, &sdebug_host_list,
4489 host_list) {
4490 list_for_each_entry(dp, &sdhp->dev_info_list,
4491 dev_list) {
4492 set_bit(SDEBUG_UA_LUNS_CHANGED,
4493 dp->uas_bm);
4494 }
4495 }
4496 spin_unlock(&sdebug_host_list_lock);
4497 }
1da177e4
LT		 4498 return count;
4499 }
4500 return -EINVAL;
4501}
82069379 4502static DRIVER_ATTR_RW(max_luns);
1da177e4 4503
82069379 4504static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
78d4e5a0
DG		 4505{
4506 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_queue);
4507}
cbf67842
DG		 4508/* N.B. max_queue can be changed while there are queued commands. In flight
4509 * commands beyond the new max_queue will be completed. */
82069379
AM		 4510static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
4511 size_t count)
78d4e5a0 4512{
cbf67842
DG		 4513 unsigned long iflags;
4514 int n, k;
78d4e5a0
DG		 4515
4516 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
4517 (n <= SCSI_DEBUG_CANQUEUE)) {
cbf67842
DG		 4518 spin_lock_irqsave(&queued_arr_lock, iflags);
4519 k = find_last_bit(queued_in_use_bm, SCSI_DEBUG_CANQUEUE);
78d4e5a0 4520 scsi_debug_max_queue = n;
cbf67842
DG		 4521 if (SCSI_DEBUG_CANQUEUE == k)
4522 atomic_set(&retired_max_queue, 0);
4523 else if (k >= n)
4524 atomic_set(&retired_max_queue, k + 1);
4525 else
4526 atomic_set(&retired_max_queue, 0);
4527 spin_unlock_irqrestore(&queued_arr_lock, iflags);
78d4e5a0
DG		 4528 return count;
4529 }
4530 return -EINVAL;
4531}
82069379 4532static DRIVER_ATTR_RW(max_queue);
78d4e5a0 4533
82069379 4534static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
78d4e5a0
DG		 4535{
4536 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_uld);
4537}
82069379 4538static DRIVER_ATTR_RO(no_uld);
78d4e5a0 4539
82069379 4540static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4541{
4542 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level);
4543}
82069379 4544static DRIVER_ATTR_RO(scsi_level);
1da177e4 4545
82069379 4546static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
c65b1445
DG		 4547{
4548 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb);
4549}
82069379
AM		 4550static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
4551 size_t count)
c65b1445 4552{
c2248fc9 4553 int n;
0d01c5df 4554 bool changed;
c65b1445
DG		 4555
4556 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
0d01c5df 4557 changed = (scsi_debug_virtual_gb != n);
c65b1445 4558 scsi_debug_virtual_gb = n;
28898873 4559 sdebug_capacity = get_sdebug_capacity();
0d01c5df
DG		 4560 if (changed) {
4561 struct sdebug_host_info *sdhp;
4562 struct sdebug_dev_info *dp;
4563
4bc6b634 4564 spin_lock(&sdebug_host_list_lock);
0d01c5df
DG		 4565 list_for_each_entry(sdhp, &sdebug_host_list,
4566 host_list) {
4567 list_for_each_entry(dp, &sdhp->dev_info_list,
4568 dev_list) {
4569 set_bit(SDEBUG_UA_CAPACITY_CHANGED,
4570 dp->uas_bm);
4571 }
4572 }
4bc6b634 4573 spin_unlock(&sdebug_host_list_lock);
0d01c5df 4574 }
c65b1445
DG		 4575 return count;
4576 }
4577 return -EINVAL;
4578}
82069379 4579static DRIVER_ATTR_RW(virtual_gb);
c65b1445 4580
82069379 4581static ssize_t add_host_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4582{
4583 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host);
4584}
4585
82069379
AM		 4586static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
4587 size_t count)
1da177e4 4588{
f3df41cf 4589 int delta_hosts;
1da177e4 4590
f3df41cf 4591 if (sscanf(buf, "%d", &delta_hosts) != 1)
1da177e4 4592 return -EINVAL;
1da177e4
LT		 4593 if (delta_hosts > 0) {
4594 do {
4595 sdebug_add_adapter();
4596 } while (--delta_hosts);
4597 } else if (delta_hosts < 0) {
4598 do {
4599 sdebug_remove_adapter();
4600 } while (++delta_hosts);
4601 }
4602 return count;
4603}
82069379 4604static DRIVER_ATTR_RW(add_host);
1da177e4 4605
82069379 4606static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
23183910
DG		 4607{
4608 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_vpd_use_hostno);
4609}
82069379
AM		 4610static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
4611 size_t count)
23183910
DG		 4612{
4613 int n;
4614
4615 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4616 scsi_debug_vpd_use_hostno = n;
4617 return count;
4618 }
4619 return -EINVAL;
4620}
82069379 4621static DRIVER_ATTR_RW(vpd_use_hostno);
23183910 4622
82069379 4623static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
597136ab
MP		 4624{
4625 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size);
4626}
82069379 4627static DRIVER_ATTR_RO(sector_size);
597136ab 4628
82069379 4629static ssize_t dix_show(struct device_driver *ddp, char *buf)
c6a44287
MP		 4630{
4631 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix);
4632}
82069379 4633static DRIVER_ATTR_RO(dix);
c6a44287 4634
82069379 4635static ssize_t dif_show(struct device_driver *ddp, char *buf)
c6a44287
MP		 4636{
4637 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif);
4638}
82069379 4639static DRIVER_ATTR_RO(dif);
c6a44287 4640
82069379 4641static ssize_t guard_show(struct device_driver *ddp, char *buf)
c6a44287 4642{
68aee7ba 4643 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_guard);
c6a44287 4644}
82069379 4645static DRIVER_ATTR_RO(guard);
c6a44287 4646
82069379 4647static ssize_t ato_show(struct device_driver *ddp, char *buf)
c6a44287
MP		 4648{
4649 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato);
4650}
82069379 4651static DRIVER_ATTR_RO(ato);
c6a44287 4652
82069379 4653static ssize_t map_show(struct device_driver *ddp, char *buf)
44d92694
MP		 4654{
4655 ssize_t count;
4656
5b94e232 4657 if (!scsi_debug_lbp())
44d92694
MP		 4658 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
4659 sdebug_store_sectors);
4660
c7badc90
TH		 4661 count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
4662 (int)map_size, map_storep);
44d92694 4663 buf[count++] = '\n';
c7badc90 4664 buf[count] = '\0';
44d92694
MP		 4665
4666 return count;
4667}
82069379 4668static DRIVER_ATTR_RO(map);
44d92694 4669
82069379 4670static ssize_t removable_show(struct device_driver *ddp, char *buf)
d986788b
MP		 4671{
4672 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_removable ? 1 : 0);
4673}
82069379
AM		 4674static ssize_t removable_store(struct device_driver *ddp, const char *buf,
4675 size_t count)
d986788b
MP		 4676{
4677 int n;
4678
4679 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4680 scsi_debug_removable = (n > 0);
4681 return count;
4682 }
4683 return -EINVAL;
4684}
82069379 4685static DRIVER_ATTR_RW(removable);
d986788b 4686
cbf67842
DG		 4687static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
4688{
4689 return scnprintf(buf, PAGE_SIZE, "%d\n", !!scsi_debug_host_lock);
4690}
4691/* Returns -EBUSY if host_lock is being changed and commands are queued */
4692static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
4693 size_t count)
4694{
4695 int n, res;
4696
4697 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4698 bool new_host_lock = (n > 0);
4699
4700 res = count;
4701 if (new_host_lock != scsi_debug_host_lock) {
4702 unsigned long iflags;
4703 int k;
4704
4705 spin_lock_irqsave(&queued_arr_lock, iflags);
4706 k = find_first_bit(queued_in_use_bm,
4707 scsi_debug_max_queue);
4708 if (k != scsi_debug_max_queue)
4709 res = -EBUSY; /* have queued commands */
4710 else
4711 scsi_debug_host_lock = new_host_lock;
4712 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4713 }
4714 return res;
4715 }
4716 return -EINVAL;
4717}
4718static DRIVER_ATTR_RW(host_lock);
4719
c2248fc9
DG		 4720static ssize_t strict_show(struct device_driver *ddp, char *buf)
4721{
4722 return scnprintf(buf, PAGE_SIZE, "%d\n", !!scsi_debug_strict);
4723}
4724static ssize_t strict_store(struct device_driver *ddp, const char *buf,
4725 size_t count)
4726{
4727 int n;
4728
4729 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4730 scsi_debug_strict = (n > 0);
4731 return count;
4732 }
4733 return -EINVAL;
4734}
4735static DRIVER_ATTR_RW(strict);
4736
cbf67842 4737
82069379 4738/* Note: The following array creates attribute files in the
23183910
DG		 4739 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
4740 files (over those found in the /sys/module/scsi_debug/parameters
4741 directory) is that auxiliary actions can be triggered when an attribute
4742 is changed. For example see: sdebug_add_host_store() above.
4743 */
6ecaff7f 4744
82069379
AM		 4745static struct attribute *sdebug_drv_attrs[] = {
4746 &driver_attr_delay.attr,
4747 &driver_attr_opts.attr,
4748 &driver_attr_ptype.attr,
4749 &driver_attr_dsense.attr,
4750 &driver_attr_fake_rw.attr,
4751 &driver_attr_no_lun_0.attr,
4752 &driver_attr_num_tgts.attr,
4753 &driver_attr_dev_size_mb.attr,
4754 &driver_attr_num_parts.attr,
4755 &driver_attr_every_nth.attr,
4756 &driver_attr_max_luns.attr,
4757 &driver_attr_max_queue.attr,
4758 &driver_attr_no_uld.attr,
4759 &driver_attr_scsi_level.attr,
4760 &driver_attr_virtual_gb.attr,
4761 &driver_attr_add_host.attr,
4762 &driver_attr_vpd_use_hostno.attr,
4763 &driver_attr_sector_size.attr,
4764 &driver_attr_dix.attr,
4765 &driver_attr_dif.attr,
4766 &driver_attr_guard.attr,
4767 &driver_attr_ato.attr,
4768 &driver_attr_map.attr,
4769 &driver_attr_removable.attr,
cbf67842
DG		 4770 &driver_attr_host_lock.attr,
4771 &driver_attr_ndelay.attr,
c2248fc9 4772 &driver_attr_strict.attr,
82069379
AM		 4773 NULL,
4774};
4775ATTRIBUTE_GROUPS(sdebug_drv);
1da177e4 4776
11ddceca 4777static struct device *pseudo_primary;
8dea0d02 4778
1da177e4
LT		 4779static int __init scsi_debug_init(void)
4780{
5f2578e5 4781 unsigned long sz;
1da177e4
LT		 4782 int host_to_add;
4783 int k;
6ecaff7f 4784 int ret;
1da177e4 4785
cbf67842
DG		 4786 atomic_set(&sdebug_cmnd_count, 0);
4787 atomic_set(&sdebug_completions, 0);
4788 atomic_set(&retired_max_queue, 0);
4789
4790 if (scsi_debug_ndelay >= 1000000000) {
c1287970 4791 pr_warn("ndelay must be less than 1 second, ignored\n");
cbf67842
DG		 4792 scsi_debug_ndelay = 0;
4793 } else if (scsi_debug_ndelay > 0)
4794 scsi_debug_delay = DELAY_OVERRIDDEN;
4795
597136ab
MP		 4796 switch (scsi_debug_sector_size) {
4797 case 512:
4798 case 1024:
4799 case 2048:
4800 case 4096:
4801 break;
4802 default:
c1287970 4803 pr_err("invalid sector_size %d\n", scsi_debug_sector_size);
597136ab
MP		 4804 return -EINVAL;
4805 }
4806
c6a44287
MP		 4807 switch (scsi_debug_dif) {
4808
4809 case SD_DIF_TYPE0_PROTECTION:
4810 case SD_DIF_TYPE1_PROTECTION:
395cef03 4811 case SD_DIF_TYPE2_PROTECTION:
c6a44287
MP		 4812 case SD_DIF_TYPE3_PROTECTION:
4813 break;
4814
4815 default:
c1287970 4816 pr_err("dif must be 0, 1, 2 or 3\n");
c6a44287
MP		 4817 return -EINVAL;
4818 }
4819
4820 if (scsi_debug_guard > 1) {
c1287970 4821 pr_err("guard must be 0 or 1\n");
c6a44287
MP		 4822 return -EINVAL;
4823 }
4824
4825 if (scsi_debug_ato > 1) {
c1287970 4826 pr_err("ato must be 0 or 1\n");
c6a44287
MP		 4827 return -EINVAL;
4828 }
4829
ea61fca5 4830 if (scsi_debug_physblk_exp > 15) {
c1287970 4831 pr_err("invalid physblk_exp %u\n", scsi_debug_physblk_exp);
ea61fca5
MP		 4832 return -EINVAL;
4833 }
4834
4835 if (scsi_debug_lowest_aligned > 0x3fff) {
c1287970
TW		 4836 pr_err("lowest_aligned too big: %u\n",
4837 scsi_debug_lowest_aligned);
ea61fca5
MP		 4838 return -EINVAL;
4839 }
4840
1da177e4
LT		 4841 if (scsi_debug_dev_size_mb < 1)
4842 scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
5f2578e5 4843 sz = (unsigned long)scsi_debug_dev_size_mb * 1048576;
597136ab 4844 sdebug_store_sectors = sz / scsi_debug_sector_size;
28898873 4845 sdebug_capacity = get_sdebug_capacity();
1da177e4
LT		 4846
4847 /* play around with geometry, don't waste too much on track 0 */
4848 sdebug_heads = 8;
4849 sdebug_sectors_per = 32;
fa785f0a 4850 if (scsi_debug_dev_size_mb >= 256)
1da177e4 4851 sdebug_heads = 64;
fa785f0a
AS		 4852 else if (scsi_debug_dev_size_mb >= 16)
4853 sdebug_heads = 32;
1da177e4
LT		 4854 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
4855 (sdebug_sectors_per * sdebug_heads);
4856 if (sdebug_cylinders_per >= 1024) {
4857 /* other LLDs do this; implies >= 1GB ram disk ... */
4858 sdebug_heads = 255;
4859 sdebug_sectors_per = 63;
4860 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
4861 (sdebug_sectors_per * sdebug_heads);
4862 }
4863
cbf67842
DG		 4864 if (0 == scsi_debug_fake_rw) {
4865 fake_storep = vmalloc(sz);
4866 if (NULL == fake_storep) {
c1287970 4867 pr_err("out of memory, 1\n");
cbf67842
DG		 4868 return -ENOMEM;
4869 }
4870 memset(fake_storep, 0, sz);
4871 if (scsi_debug_num_parts > 0)
4872 sdebug_build_parts(fake_storep, sz);
1da177e4 4873 }
1da177e4 4874
7cb69d03 4875 if (scsi_debug_dix) {
c6a44287
MP		 4876 int dif_size;
4877
4878 dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple);
4879 dif_storep = vmalloc(dif_size);
4880
c1287970 4881 pr_err("dif_storep %u bytes @ %p\n", dif_size, dif_storep);
c6a44287
MP		 4882
4883 if (dif_storep == NULL) {
c1287970 4884 pr_err("out of mem. (DIX)\n");
c6a44287
MP		 4885 ret = -ENOMEM;
4886 goto free_vm;
4887 }
4888
4889 memset(dif_storep, 0xff, dif_size);
4890 }
4891
5b94e232
MP		 4892 /* Logical Block Provisioning */
4893 if (scsi_debug_lbp()) {
6014759c
MP		 4894 scsi_debug_unmap_max_blocks =
4895 clamp(scsi_debug_unmap_max_blocks, 0U, 0xffffffffU);
4896
4897 scsi_debug_unmap_max_desc =
4898 clamp(scsi_debug_unmap_max_desc, 0U, 256U);
4899
4900 scsi_debug_unmap_granularity =
4901 clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU);
4902
4903 if (scsi_debug_unmap_alignment &&
ac17078a
AM		 4904 scsi_debug_unmap_granularity <=
4905 scsi_debug_unmap_alignment) {
c1287970 4906 pr_err("ERR: unmap_granularity <= unmap_alignment\n");
44d92694
MP		 4907 return -EINVAL;
4908 }
4909
b90ebc3d
AM		 4910 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
4911 map_storep = vmalloc(BITS_TO_LONGS(map_size) * sizeof(long));
44d92694 4912
c1287970 4913 pr_info("%lu provisioning blocks\n", map_size);
44d92694
MP		 4914
4915 if (map_storep == NULL) {
c1287970 4916 pr_err("out of mem. (MAP)\n");
44d92694
MP		 4917 ret = -ENOMEM;
4918 goto free_vm;
4919 }
4920
b90ebc3d 4921 bitmap_zero(map_storep, map_size);
44d92694
MP		 4922
4923 /* Map first 1KB for partition table */
4924 if (scsi_debug_num_parts)
4925 map_region(0, 2);
4926 }
4927
9b906779
NB		 4928 pseudo_primary = root_device_register("pseudo_0");
4929 if (IS_ERR(pseudo_primary)) {
c1287970 4930 pr_warn("root_device_register() error\n");
9b906779 4931 ret = PTR_ERR(pseudo_primary);
6ecaff7f
RD		 4932 goto free_vm;
4933 }
4934 ret = bus_register(&pseudo_lld_bus);
4935 if (ret < 0) {
c1287970 4936 pr_warn("bus_register error: %d\n", ret);
6ecaff7f
RD		 4937 goto dev_unreg;
4938 }
4939 ret = driver_register(&sdebug_driverfs_driver);
4940 if (ret < 0) {
c1287970 4941 pr_warn("driver_register error: %d\n", ret);
6ecaff7f
RD		 4942 goto bus_unreg;
4943 }
1da177e4 4944
1da177e4
LT		 4945 host_to_add = scsi_debug_add_host;
4946 scsi_debug_add_host = 0;
4947
4948 for (k = 0; k < host_to_add; k++) {
4949 if (sdebug_add_adapter()) {
c1287970 4950 pr_err("sdebug_add_adapter failed k=%d\n", k);
1da177e4
LT		 4951 break;
4952 }
4953 }
4954
c1287970
TW		 4955 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
4956 pr_info("built %d host(s)\n", scsi_debug_add_host);
4957
1da177e4 4958 return 0;
6ecaff7f 4959
6ecaff7f
RD		 4960bus_unreg:
4961 bus_unregister(&pseudo_lld_bus);
4962dev_unreg:
9b906779 4963 root_device_unregister(pseudo_primary);
6ecaff7f 4964free_vm:
de232af6
TW		 4965 vfree(map_storep);
4966 vfree(dif_storep);
6ecaff7f
RD		 4967 vfree(fake_storep);
4968
4969 return ret;
1da177e4
LT		 4970}
4971
4972static void __exit scsi_debug_exit(void)
4973{
4974 int k = scsi_debug_add_host;
4975
4976 stop_all_queued();
cbf67842 4977 free_all_queued();
1da177e4
LT		 4978 for (; k; k--)
4979 sdebug_remove_adapter();
1da177e4
LT		 4980 driver_unregister(&sdebug_driverfs_driver);
4981 bus_unregister(&pseudo_lld_bus);
9b906779 4982 root_device_unregister(pseudo_primary);
1da177e4 4983
de232af6 4984 vfree(dif_storep);
1da177e4
LT		 4985 vfree(fake_storep);
4986}
4987
4988device_initcall(scsi_debug_init);
4989module_exit(scsi_debug_exit);
4990
1da177e4
LT		 4991static void sdebug_release_adapter(struct device * dev)
4992{
4993 struct sdebug_host_info *sdbg_host;
4994
4995 sdbg_host = to_sdebug_host(dev);
4996 kfree(sdbg_host);
4997}
4998
4999static int sdebug_add_adapter(void)
5000{
5001 int k, devs_per_host;
5002 int error = 0;
5003 struct sdebug_host_info *sdbg_host;
8b40228f 5004 struct sdebug_dev_info *sdbg_devinfo, *tmp;
1da177e4 5005
c65b1445 5006 sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL);
1da177e4 5007 if (NULL == sdbg_host) {
c1287970 5008 pr_err("out of memory at line %d\n", __LINE__);
1da177e4
LT		 5009 return -ENOMEM;
5010 }
5011
1da177e4
LT		 5012 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
5013
5014 devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns;
5015 for (k = 0; k < devs_per_host; k++) {
5cb2fc06
FT		 5016 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
5017 if (!sdbg_devinfo) {
c1287970 5018 pr_err("out of memory at line %d\n", __LINE__);
1da177e4
LT		 5019 error = -ENOMEM;
5020 goto clean;
5021 }
1da177e4
LT		 5022 }
5023
5024 spin_lock(&sdebug_host_list_lock);
5025 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
5026 spin_unlock(&sdebug_host_list_lock);
5027
5028 sdbg_host->dev.bus = &pseudo_lld_bus;
9b906779 5029 sdbg_host->dev.parent = pseudo_primary;
1da177e4 5030 sdbg_host->dev.release = &sdebug_release_adapter;
71610f55 5031 dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host);
1da177e4
LT		 5032
5033 error = device_register(&sdbg_host->dev);
5034
5035 if (error)
5036 goto clean;
5037
5038 ++scsi_debug_add_host;
5039 return error;
5040
5041clean:
8b40228f
FT		 5042 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
5043 dev_list) {
1da177e4
LT		 5044 list_del(&sdbg_devinfo->dev_list);
5045 kfree(sdbg_devinfo);
5046 }
5047
5048 kfree(sdbg_host);
5049 return error;
5050}
5051
5052static void sdebug_remove_adapter(void)
5053{
5054 struct sdebug_host_info * sdbg_host = NULL;
5055
5056 spin_lock(&sdebug_host_list_lock);
5057 if (!list_empty(&sdebug_host_list)) {
5058 sdbg_host = list_entry(sdebug_host_list.prev,
5059 struct sdebug_host_info, host_list);
5060 list_del(&sdbg_host->host_list);
5061 }
5062 spin_unlock(&sdebug_host_list_lock);
5063
5064 if (!sdbg_host)
5065 return;
5066
5067 device_unregister(&sdbg_host->dev);
5068 --scsi_debug_add_host;
5069}
5070
cbf67842 5071static int
db5ed4df 5072sdebug_change_qdepth(struct scsi_device *sdev, int qdepth)
cbf67842
DG		 5073{
5074 int num_in_q = 0;
cbf67842
DG		 5075 unsigned long iflags;
5076 struct sdebug_dev_info *devip;
5077
5078 spin_lock_irqsave(&queued_arr_lock, iflags);
5079 devip = (struct sdebug_dev_info *)sdev->hostdata;
5080 if (NULL == devip) {
5081 spin_unlock_irqrestore(&queued_arr_lock, iflags);
5082 return -ENODEV;
5083 }
5084 num_in_q = atomic_read(&devip->num_in_q);
5085 spin_unlock_irqrestore(&queued_arr_lock, iflags);
c40ecc12
CH		 5086
5087 if (qdepth < 1)
5088 qdepth = 1;
5089 /* allow to exceed max host queued_arr elements for testing */
5090 if (qdepth > SCSI_DEBUG_CANQUEUE + 10)
5091 qdepth = SCSI_DEBUG_CANQUEUE + 10;
db5ed4df 5092 scsi_change_queue_depth(sdev, qdepth);
c40ecc12 5093
cbf67842 5094 if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) {
c40ecc12
CH		 5095 sdev_printk(KERN_INFO, sdev,
5096 "%s: qdepth=%d, num_in_q=%d\n",
5097 __func__, qdepth, num_in_q);
cbf67842
DG		 5098 }
5099 return sdev->queue_depth;
5100}
5101
817fd66b
DG		 5102static int
5103check_inject(struct scsi_cmnd *scp)
5104{
5105 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
5106
5107 memset(ep, 0, sizeof(struct sdebug_scmd_extra_t));
5108
5109 if (atomic_inc_return(&sdebug_cmnd_count) >=
5110 abs(scsi_debug_every_nth)) {
5111 atomic_set(&sdebug_cmnd_count, 0);
5112 if (scsi_debug_every_nth < -1)
5113 scsi_debug_every_nth = -1;
5114 if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts)
5115 return 1; /* ignore command causing timeout */
5116 else if (SCSI_DEBUG_OPT_MAC_TIMEOUT & scsi_debug_opts &&
5117 scsi_medium_access_command(scp))
5118 return 1; /* time out reads and writes */
5119 if (sdebug_any_injecting_opt) {
5120 int opts = scsi_debug_opts;
5121
5122 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
5123 ep->inj_recovered = true;
5124 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
5125 ep->inj_transport = true;
5126 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
5127 ep->inj_dif = true;
5128 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
5129 ep->inj_dix = true;
5130 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
5131 ep->inj_short = true;
5132 }
5133 }
5134 return 0;
5135}
5136
c2248fc9
DG		 5137static int
5138scsi_debug_queuecommand(struct scsi_cmnd *scp)
5139{
5140 u8 sdeb_i;
5141 struct scsi_device *sdp = scp->device;
5142 const struct opcode_info_t *oip;
5143 const struct opcode_info_t *r_oip;
5144 struct sdebug_dev_info *devip;
5145 u8 *cmd = scp->cmnd;
5146 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
5147 int k, na;
5148 int errsts = 0;
5149 int errsts_no_connect = DID_NO_CONNECT << 16;
5150 u32 flags;
5151 u16 sa;
5152 u8 opcode = cmd[0];
5153 bool has_wlun_rl;
5154 bool debug = !!(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts);
5155
5156 scsi_set_resid(scp, 0);
5157 if (debug && !(SCSI_DEBUG_OPT_NO_CDB_NOISE & scsi_debug_opts)) {
5158 char b[120];
5159 int n, len, sb;
5160
5161 len = scp->cmd_len;
5162 sb = (int)sizeof(b);
5163 if (len > 32)
5164 strcpy(b, "too long, over 32 bytes");
5165 else {
5166 for (k = 0, n = 0; k < len && n < sb; ++k)
5167 n += scnprintf(b + n, sb - n, "%02x ",
5168 (u32)cmd[k]);
5169 }
5170 sdev_printk(KERN_INFO, sdp, "%s: cmd %s\n", my_name, b);
5171 }
34d55434 5172 has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS);
c2248fc9
DG		 5173 if ((sdp->lun >= scsi_debug_max_luns) && !has_wlun_rl)
5174 return schedule_resp(scp, NULL, errsts_no_connect, 0);
5175
5176 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */
5177 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */
5178 devip = (struct sdebug_dev_info *)sdp->hostdata;
5179 if (!devip) {
5180 devip = devInfoReg(sdp);
5181 if (NULL == devip)
5182 return schedule_resp(scp, NULL, errsts_no_connect, 0);
5183 }
5184 na = oip->num_attached;
5185 r_pfp = oip->pfp;
5186 if (na) { /* multiple commands with this opcode */
5187 r_oip = oip;
5188 if (FF_SA & r_oip->flags) {
5189 if (F_SA_LOW & oip->flags)
5190 sa = 0x1f & cmd[1];
5191 else
5192 sa = get_unaligned_be16(cmd + 8);
5193 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5194 if (opcode == oip->opcode && sa == oip->sa)
5195 break;
5196 }
5197 } else { /* since no service action only check opcode */
5198 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5199 if (opcode == oip->opcode)
5200 break;
5201 }
5202 }
5203 if (k > na) {
5204 if (F_SA_LOW & r_oip->flags)
5205 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4);
5206 else if (F_SA_HIGH & r_oip->flags)
5207 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7);
5208 else
5209 mk_sense_invalid_opcode(scp);
5210 goto check_cond;
5211 }
5212 } /* else (when na==0) we assume the oip is a match */
5213 flags = oip->flags;
5214 if (F_INV_OP & flags) {
5215 mk_sense_invalid_opcode(scp);
5216 goto check_cond;
5217 }
5218 if (has_wlun_rl && !(F_RL_WLUN_OK & flags)) {
5219 if (debug)
5220 sdev_printk(KERN_INFO, sdp, "scsi_debug: Opcode: "
5221 "0x%x not supported for wlun\n", opcode);
5222 mk_sense_invalid_opcode(scp);
5223 goto check_cond;
5224 }
5225 if (scsi_debug_strict) { /* check cdb against mask */
5226 u8 rem;
5227 int j;
5228
5229 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) {
5230 rem = ~oip->len_mask[k] & cmd[k];
5231 if (rem) {
5232 for (j = 7; j >= 0; --j, rem <<= 1) {
5233 if (0x80 & rem)
5234 break;
5235 }
5236 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j);
5237 goto check_cond;
5238 }
5239 }
5240 }
5241 if (!(F_SKIP_UA & flags) &&
5242 SDEBUG_NUM_UAS != find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS)) {
5243 errsts = check_readiness(scp, UAS_ONLY, devip);
5244 if (errsts)
5245 goto check_cond;
5246 }
5247 if ((F_M_ACCESS & flags) && devip->stopped) {
5248 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2);
5249 if (debug)
5250 sdev_printk(KERN_INFO, sdp, "%s reports: Not ready: "
5251 "%s\n", my_name, "initializing command "
5252 "required");
5253 errsts = check_condition_result;
5254 goto fini;
5255 }
5256 if (scsi_debug_fake_rw && (F_FAKE_RW & flags))
5257 goto fini;
5258 if (scsi_debug_every_nth) {
5259 if (check_inject(scp))
5260 return 0; /* ignore command: make trouble */
5261 }
5262 if (oip->pfp) /* if this command has a resp_* function, call it */
5263 errsts = oip->pfp(scp, devip);
5264 else if (r_pfp) /* if leaf function ptr NULL, try the root's */
5265 errsts = r_pfp(scp, devip);
5266
5267fini:
5268 return schedule_resp(scp, devip, errsts,
5269 ((F_DELAY_OVERR & flags) ? 0 : scsi_debug_delay));
5270check_cond:
5271 return schedule_resp(scp, devip, check_condition_result, 0);
5272}
5273
38d5c833
DG		 5274static int
5275sdebug_queuecommand_lock_or_not(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
5276{
5277 if (scsi_debug_host_lock) {
5278 unsigned long iflags;
5279 int rc;
5280
5281 spin_lock_irqsave(shost->host_lock, iflags);
5282 rc = scsi_debug_queuecommand(cmd);
5283 spin_unlock_irqrestore(shost->host_lock, iflags);
5284 return rc;
5285 } else
5286 return scsi_debug_queuecommand(cmd);
5287}
5288
9e603ca0 5289static struct scsi_host_template sdebug_driver_template = {
c8ed555a
AV		 5290 .show_info = scsi_debug_show_info,
5291 .write_info = scsi_debug_write_info,
9e603ca0
FT		 5292 .proc_name = sdebug_proc_name,
5293 .name = "SCSI DEBUG",
5294 .info = scsi_debug_info,
5295 .slave_alloc = scsi_debug_slave_alloc,
5296 .slave_configure = scsi_debug_slave_configure,
5297 .slave_destroy = scsi_debug_slave_destroy,
5298 .ioctl = scsi_debug_ioctl,
cbf67842
DG		 5299 .queuecommand = sdebug_queuecommand_lock_or_not,
5300 .change_queue_depth = sdebug_change_qdepth,
9e603ca0 5301 .eh_abort_handler = scsi_debug_abort,
9e603ca0 5302 .eh_device_reset_handler = scsi_debug_device_reset,
cbf67842
DG		 5303 .eh_target_reset_handler = scsi_debug_target_reset,
5304 .eh_bus_reset_handler = scsi_debug_bus_reset,
9e603ca0 5305 .eh_host_reset_handler = scsi_debug_host_reset,
9e603ca0
FT		 5306 .can_queue = SCSI_DEBUG_CANQUEUE,
5307 .this_id = 7,
6bb5e6e7 5308 .sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS,
cbf67842 5309 .cmd_per_lun = DEF_CMD_PER_LUN,
6bb5e6e7 5310 .max_sectors = -1U,
9e603ca0
FT		 5311 .use_clustering = DISABLE_CLUSTERING,
5312 .module = THIS_MODULE,
c40ecc12 5313 .track_queue_depth = 1,
817fd66b 5314 .cmd_size = sizeof(struct sdebug_scmd_extra_t),
9e603ca0
FT		 5315};
5316
1da177e4
LT		 5317static int sdebug_driver_probe(struct device * dev)
5318{
22017ed2 5319 int error = 0;
817fd66b 5320 int opts;
22017ed2
DG		 5321 struct sdebug_host_info *sdbg_host;
5322 struct Scsi_Host *hpnt;
c6a44287 5323 int host_prot;
1da177e4
LT		 5324
5325 sdbg_host = to_sdebug_host(dev);
5326
78d4e5a0 5327 sdebug_driver_template.can_queue = scsi_debug_max_queue;
0759c666
AM		 5328 if (scsi_debug_clustering)
5329 sdebug_driver_template.use_clustering = ENABLE_CLUSTERING;
78d4e5a0
DG		 5330 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
5331 if (NULL == hpnt) {
c1287970 5332 pr_err("scsi_host_alloc failed\n");
78d4e5a0 5333 error = -ENODEV;
1da177e4 5334 return error;
78d4e5a0 5335 }
1da177e4
LT		 5336
5337 sdbg_host->shost = hpnt;
5338 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
5339 if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id))
5340 hpnt->max_id = scsi_debug_num_tgts + 1;
5341 else
5342 hpnt->max_id = scsi_debug_num_tgts;
f2d3fd29
TW		 5343 /* = scsi_debug_max_luns; */
5344 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
1da177e4 5345
c6a44287
MP		 5346 host_prot = 0;
5347
5348 switch (scsi_debug_dif) {
5349
5350 case SD_DIF_TYPE1_PROTECTION:
5351 host_prot = SHOST_DIF_TYPE1_PROTECTION;
5352 if (scsi_debug_dix)
5353 host_prot |= SHOST_DIX_TYPE1_PROTECTION;
5354 break;
5355
5356 case SD_DIF_TYPE2_PROTECTION:
5357 host_prot = SHOST_DIF_TYPE2_PROTECTION;
5358 if (scsi_debug_dix)
5359 host_prot |= SHOST_DIX_TYPE2_PROTECTION;
5360 break;
5361
5362 case SD_DIF_TYPE3_PROTECTION:
5363 host_prot = SHOST_DIF_TYPE3_PROTECTION;
5364 if (scsi_debug_dix)
5365 host_prot |= SHOST_DIX_TYPE3_PROTECTION;
5366 break;
5367
5368 default:
5369 if (scsi_debug_dix)
5370 host_prot |= SHOST_DIX_TYPE0_PROTECTION;
5371 break;
5372 }
5373
5374 scsi_host_set_prot(hpnt, host_prot);
5375
c1287970 5376 pr_info("host protection%s%s%s%s%s%s%s\n",
c6a44287
MP		 5377 (host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
5378 (host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
5379 (host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
5380 (host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
5381 (host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
5382 (host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
5383 (host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
5384
5385 if (scsi_debug_guard == 1)
5386 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
5387 else
5388 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
5389
817fd66b
DG		 5390 opts = scsi_debug_opts;
5391 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
5392 sdebug_any_injecting_opt = true;
5393 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
5394 sdebug_any_injecting_opt = true;
5395 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
5396 sdebug_any_injecting_opt = true;
5397 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
5398 sdebug_any_injecting_opt = true;
5399 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
5400 sdebug_any_injecting_opt = true;
5401
1da177e4
LT		 5402 error = scsi_add_host(hpnt, &sdbg_host->dev);
5403 if (error) {
c1287970 5404 pr_err("scsi_add_host failed\n");
1da177e4
LT		 5405 error = -ENODEV;
5406 scsi_host_put(hpnt);
5407 } else
5408 scsi_scan_host(hpnt);
5409
cbf67842 5410 return error;
1da177e4
LT		 5411}
5412
5413static int sdebug_driver_remove(struct device * dev)
5414{
1da177e4 5415 struct sdebug_host_info *sdbg_host;
8b40228f 5416 struct sdebug_dev_info *sdbg_devinfo, *tmp;
1da177e4
LT		 5417
5418 sdbg_host = to_sdebug_host(dev);
5419
5420 if (!sdbg_host) {
c1287970 5421 pr_err("Unable to locate host info\n");
1da177e4
LT		 5422 return -ENODEV;
5423 }
5424
5425 scsi_remove_host(sdbg_host->shost);
5426
8b40228f
FT		 5427 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
5428 dev_list) {
1da177e4
LT		 5429 list_del(&sdbg_devinfo->dev_list);
5430 kfree(sdbg_devinfo);
5431 }
5432
5433 scsi_host_put(sdbg_host->shost);
5434 return 0;
5435}
5436
8dea0d02
FT		 5437static int pseudo_lld_bus_match(struct device *dev,
5438 struct device_driver *dev_driver)
1da177e4 5439{
8dea0d02 5440 return 1;
1da177e4 5441}
8dea0d02
FT		 5442
5443static struct bus_type pseudo_lld_bus = {
5444 .name = "pseudo",
5445 .match = pseudo_lld_bus_match,
5446 .probe = sdebug_driver_probe,
5447 .remove = sdebug_driver_remove,
82069379 5448 .drv_groups = sdebug_drv_groups,
8dea0d02 5449};
Linux 6.x block layer and io_uring tree(s)