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scsi_debug: make dump_sector static
[mirror_ubuntu-jammy-kernel.git] / drivers / scsi / scsi_debug.c
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1da177e4 1/*
1da177e4
LT		 2 * vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
3 * Copyright (C) 1992 Eric Youngdale
4 * Simulate a host adapter with 2 disks attached. Do a lot of checking
5 * to make sure that we are not getting blocks mixed up, and PANIC if
6 * anything out of the ordinary is seen.
7 * ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
8 *
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
e308b3d1 132#define DEF_OPT_BLKS 64
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} },
468 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* VERIFY */
469 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
470 {1, 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_DIRECT_IO, resp_read_dt0,
471 vl_iarr, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0x9, 0xfe, 0,
472 0xff, 0xff, 0xff, 0xff} },/* VARIABLE LENGTH, READ(32) */
473 {1, 0x56, 0, F_D_OUT, NULL, reserve_iarr, /* RESERVE(10) */
474 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
475 0} },
476 {1, 0x57, 0, F_D_OUT, NULL, release_iarr, /* RELEASE(10) */
477 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
478 0} },
479/* 20 */
480 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ALLOW REMOVAL */
481 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
482 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */
483 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
484 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */
485 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
486 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */
487 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
488 {0, 0x42, 0, F_D_OUT | FF_DIRECT_IO, resp_unmap, NULL, /* UNMAP */
489 {10, 0x1, 0, 0, 0, 0, 0x1f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
490 {0, 0x53, 0, F_D_IN | F_D_OUT | FF_DIRECT_IO, resp_xdwriteread_10,
491 NULL, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7,
492 0, 0, 0, 0, 0, 0} },
acafd0b9
EM		 493 {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL,
494 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0,
495 0, 0, 0, 0} }, /* WRITE_BUFFER */
c2248fc9
DG		 496 {1, 0x41, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, resp_write_same_10,
497 write_same_iarr, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff,
498 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
499 {0, 0x35, 0, F_DELAY_OVERR | FF_DIRECT_IO, NULL, NULL, /* SYNC_CACHE */
500 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
501 0, 0, 0, 0} },
38d5c833 502 {0, 0x89, 0, F_D_OUT | FF_DIRECT_IO, resp_comp_write, NULL,
c2248fc9
DG		 503 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
504 0, 0xff, 0x1f, 0xc7} }, /* COMPARE AND WRITE */
505
506/* 30 */
507 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */
508 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
509};
510
817fd66b
DG		 511struct sdebug_scmd_extra_t {
512 bool inj_recovered;
513 bool inj_transport;
514 bool inj_dif;
515 bool inj_dix;
516 bool inj_short;
517};
518
1da177e4 519static int scsi_debug_add_host = DEF_NUM_HOST;
5b94e232 520static int scsi_debug_ato = DEF_ATO;
1da177e4
LT		 521static int scsi_debug_delay = DEF_DELAY;
522static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB;
5b94e232
MP		 523static int scsi_debug_dif = DEF_DIF;
524static int scsi_debug_dix = DEF_DIX;
525static int scsi_debug_dsense = DEF_D_SENSE;
1da177e4 526static int scsi_debug_every_nth = DEF_EVERY_NTH;
5b94e232 527static int scsi_debug_fake_rw = DEF_FAKE_RW;
68aee7ba 528static unsigned int scsi_debug_guard = DEF_GUARD;
5b94e232 529static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED;
1da177e4 530static int scsi_debug_max_luns = DEF_MAX_LUNS;
78d4e5a0 531static int scsi_debug_max_queue = SCSI_DEBUG_CANQUEUE;
cbf67842
DG		 532static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */
533static int scsi_debug_ndelay = DEF_NDELAY;
5b94e232 534static int scsi_debug_no_lun_0 = DEF_NO_LUN_0;
78d4e5a0 535static int scsi_debug_no_uld = 0;
5b94e232 536static int scsi_debug_num_parts = DEF_NUM_PARTS;
1da177e4 537static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */
5b94e232 538static int scsi_debug_opt_blks = DEF_OPT_BLKS;
1da177e4 539static int scsi_debug_opts = DEF_OPTS;
5b94e232 540static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP;
1da177e4 541static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */
5b94e232
MP		 542static int scsi_debug_scsi_level = DEF_SCSI_LEVEL;
543static int scsi_debug_sector_size = DEF_SECTOR_SIZE;
c65b1445 544static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB;
23183910 545static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
5b94e232
MP		 546static unsigned int scsi_debug_lbpu = DEF_LBPU;
547static unsigned int scsi_debug_lbpws = DEF_LBPWS;
548static unsigned int scsi_debug_lbpws10 = DEF_LBPWS10;
be1dd78d 549static unsigned int scsi_debug_lbprz = DEF_LBPRZ;
6014759c 550static unsigned int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
5b94e232
MP		 551static unsigned int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY;
552static unsigned int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
553static unsigned int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
554static unsigned int scsi_debug_write_same_length = DEF_WRITESAME_LENGTH;
d986788b 555static bool scsi_debug_removable = DEF_REMOVABLE;
0759c666 556static bool scsi_debug_clustering;
cbf67842 557static bool scsi_debug_host_lock = DEF_HOST_LOCK;
c2248fc9 558static bool scsi_debug_strict = DEF_STRICT;
817fd66b 559static bool sdebug_any_injecting_opt;
1da177e4 560
cbf67842
DG		 561static atomic_t sdebug_cmnd_count;
562static atomic_t sdebug_completions;
563static atomic_t sdebug_a_tsf; /* counter of 'almost' TSFs */
1da177e4
LT		 564
565#define DEV_READONLY(TGT) (0)
1da177e4 566
c65b1445 567static unsigned int sdebug_store_sectors;
1da177e4
LT		 568static sector_t sdebug_capacity; /* in sectors */
569
570/* old BIOS stuff, kernel may get rid of them but some mode sense pages
571 may still need them */
572static int sdebug_heads; /* heads per disk */
573static int sdebug_cylinders_per; /* cylinders per surface */
574static int sdebug_sectors_per; /* sectors per cylinder */
575
1da177e4
LT		 576#define SDEBUG_MAX_PARTS 4
577
395cef03 578#define SCSI_DEBUG_MAX_CMD_LEN 32
9e603ca0 579
5b94e232
MP		 580static unsigned int scsi_debug_lbp(void)
581{
cbf67842
DG		 582 return ((0 == scsi_debug_fake_rw) &&
583 (scsi_debug_lbpu | scsi_debug_lbpws | scsi_debug_lbpws10));
5b94e232
MP		 584}
585
1da177e4
LT		 586struct sdebug_dev_info {
587 struct list_head dev_list;
1da177e4
LT		 588 unsigned int channel;
589 unsigned int target;
9cb78c16 590 u64 lun;
1da177e4 591 struct sdebug_host_info *sdbg_host;
cbf67842
DG		 592 unsigned long uas_bm[1];
593 atomic_t num_in_q;
c2248fc9
DG		 594 char stopped; /* TODO: should be atomic */
595 bool used;
1da177e4
LT		 596};
597
598struct sdebug_host_info {
599 struct list_head host_list;
600 struct Scsi_Host *shost;
601 struct device dev;
602 struct list_head dev_info_list;
603};
604
605#define to_sdebug_host(d) \
606 container_of(d, struct sdebug_host_info, dev)
607
608static LIST_HEAD(sdebug_host_list);
609static DEFINE_SPINLOCK(sdebug_host_list_lock);
610
cbf67842
DG		 611
612struct sdebug_hrtimer { /* ... is derived from hrtimer */
613 struct hrtimer hrt; /* must be first element */
614 int qa_indx;
615};
1da177e4
LT		 616
617struct sdebug_queued_cmd {
cbf67842
DG		 618 /* in_use flagged by a bit in queued_in_use_bm[] */
619 struct timer_list *cmnd_timerp;
620 struct tasklet_struct *tletp;
621 struct sdebug_hrtimer *sd_hrtp;
1da177e4 622 struct scsi_cmnd * a_cmnd;
1da177e4
LT		 623};
624static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
cbf67842
DG		 625static unsigned long queued_in_use_bm[SCSI_DEBUG_CANQUEUE_WORDS];
626
1da177e4 627
1da177e4 628static unsigned char * fake_storep; /* ramdisk storage */
e18d8bea 629static struct sd_dif_tuple *dif_storep; /* protection info */
44d92694 630static void *map_storep; /* provisioning map */
1da177e4 631
44d92694 632static unsigned long map_size;
cbf67842
DG		 633static int num_aborts;
634static int num_dev_resets;
635static int num_target_resets;
636static int num_bus_resets;
637static int num_host_resets;
c6a44287
MP		 638static int dix_writes;
639static int dix_reads;
640static int dif_errors;
1da177e4
LT		 641
642static DEFINE_SPINLOCK(queued_arr_lock);
643static DEFINE_RWLOCK(atomic_rw);
644
cbf67842
DG		 645static char sdebug_proc_name[] = MY_NAME;
646static const char *my_name = MY_NAME;
1da177e4 647
1da177e4
LT		 648static struct bus_type pseudo_lld_bus;
649
650static struct device_driver sdebug_driverfs_driver = {
651 .name = sdebug_proc_name,
652 .bus = &pseudo_lld_bus,
1da177e4
LT		 653};
654
655static const int check_condition_result =
656 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
657
c6a44287
MP		 658static const int illegal_condition_result =
659 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
660
cbf67842
DG		 661static const int device_qfull_result =
662 (DID_OK << 16) | (COMMAND_COMPLETE << 8) | SAM_STAT_TASK_SET_FULL;
663
664static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
665 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
666 0, 0, 0, 0};
c65b1445
DG		 667static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
668 0, 0, 0x2, 0x4b};
669static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
670 0, 0, 0x0, 0x0};
671
14faa944
AM		 672static void *fake_store(unsigned long long lba)
673{
674 lba = do_div(lba, sdebug_store_sectors);
675
676 return fake_storep + lba * scsi_debug_sector_size;
677}
678
679static struct sd_dif_tuple *dif_store(sector_t sector)
680{
681 sector = do_div(sector, sdebug_store_sectors);
682
683 return dif_storep + sector;
684}
685
1da177e4
LT		 686static int sdebug_add_adapter(void);
687static void sdebug_remove_adapter(void);
1da177e4 688
8dea0d02
FT		 689static void sdebug_max_tgts_luns(void)
690{
691 struct sdebug_host_info *sdbg_host;
692 struct Scsi_Host *hpnt;
693
694 spin_lock(&sdebug_host_list_lock);
695 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
696 hpnt = sdbg_host->shost;
697 if ((hpnt->this_id >= 0) &&
698 (scsi_debug_num_tgts > hpnt->this_id))
699 hpnt->max_id = scsi_debug_num_tgts + 1;
700 else
701 hpnt->max_id = scsi_debug_num_tgts;
702 /* scsi_debug_max_luns; */
34d55434 703 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS;
8dea0d02
FT		 704 }
705 spin_unlock(&sdebug_host_list_lock);
706}
707
22017ed2
DG		 708enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
709
710/* Set in_bit to -1 to indicate no bit position of invalid field */
711static void
712mk_sense_invalid_fld(struct scsi_cmnd *scp, enum sdeb_cmd_data c_d,
713 int in_byte, int in_bit)
714{
715 unsigned char *sbuff;
716 u8 sks[4];
717 int sl, asc;
718
719 sbuff = scp->sense_buffer;
720 if (!sbuff) {
721 sdev_printk(KERN_ERR, scp->device,
722 "%s: sense_buffer is NULL\n", __func__);
723 return;
724 }
725 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
726 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
727 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, ILLEGAL_REQUEST,
728 asc, 0);
729 memset(sks, 0, sizeof(sks));
730 sks[0] = 0x80;
731 if (c_d)
732 sks[0] |= 0x40;
733 if (in_bit >= 0) {
734 sks[0] |= 0x8;
735 sks[0] |= 0x7 & in_bit;
736 }
737 put_unaligned_be16(in_byte, sks + 1);
738 if (scsi_debug_dsense) {
739 sl = sbuff[7] + 8;
740 sbuff[7] = sl;
741 sbuff[sl] = 0x2;
742 sbuff[sl + 1] = 0x6;
743 memcpy(sbuff + sl + 4, sks, 3);
744 } else
745 memcpy(sbuff + 15, sks, 3);
746 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
747 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
748 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
749 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
750}
751
cbf67842 752static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
8dea0d02
FT		 753{
754 unsigned char *sbuff;
755
cbf67842
DG		 756 sbuff = scp->sense_buffer;
757 if (!sbuff) {
758 sdev_printk(KERN_ERR, scp->device,
759 "%s: sense_buffer is NULL\n", __func__);
760 return;
761 }
762 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
8dea0d02
FT		 763
764 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, key, asc, asq);
765
766 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
cbf67842
DG		 767 sdev_printk(KERN_INFO, scp->device,
768 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
769 my_name, key, asc, asq);
8dea0d02 770}
1da177e4 771
22017ed2
DG		 772static void
773mk_sense_invalid_opcode(struct scsi_cmnd *scp)
774{
775 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
776}
777
1da177e4
LT		 778static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
779{
780 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
cbf67842
DG		 781 if (0x1261 == cmd)
782 sdev_printk(KERN_INFO, dev,
783 "%s: BLKFLSBUF [0x1261]\n", __func__);
784 else if (0x5331 == cmd)
785 sdev_printk(KERN_INFO, dev,
786 "%s: CDROM_GET_CAPABILITY [0x5331]\n",
787 __func__);
788 else
789 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
790 __func__, cmd);
1da177e4
LT		 791 }
792 return -EINVAL;
793 /* return -ENOTTY; // correct return but upsets fdisk */
794}
795
19c8ead7
EM		 796static void clear_luns_changed_on_target(struct sdebug_dev_info *devip)
797{
798 struct sdebug_host_info *sdhp;
799 struct sdebug_dev_info *dp;
800
801 spin_lock(&sdebug_host_list_lock);
802 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
803 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
804 if ((devip->sdbg_host == dp->sdbg_host) &&
805 (devip->target == dp->target))
806 clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
807 }
808 }
809 spin_unlock(&sdebug_host_list_lock);
810}
811
cbf67842 812static int check_readiness(struct scsi_cmnd *SCpnt, int uas_only,
c65b1445 813 struct sdebug_dev_info * devip)
1da177e4 814{
cbf67842
DG		 815 int k;
816 bool debug = !!(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts);
817
818 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
819 if (k != SDEBUG_NUM_UAS) {
820 const char *cp = NULL;
821
822 switch (k) {
823 case SDEBUG_UA_POR:
824 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
825 UA_RESET_ASC, POWER_ON_RESET_ASCQ);
826 if (debug)
827 cp = "power on reset";
828 break;
829 case SDEBUG_UA_BUS_RESET:
830 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
831 UA_RESET_ASC, BUS_RESET_ASCQ);
832 if (debug)
833 cp = "bus reset";
834 break;
835 case SDEBUG_UA_MODE_CHANGED:
836 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
837 UA_CHANGED_ASC, MODE_CHANGED_ASCQ);
838 if (debug)
839 cp = "mode parameters changed";
840 break;
0d01c5df
DG		 841 case SDEBUG_UA_CAPACITY_CHANGED:
842 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
843 UA_CHANGED_ASC, CAPACITY_CHANGED_ASCQ);
844 if (debug)
845 cp = "capacity data changed";
f49accf1 846 break;
acafd0b9
EM		 847 case SDEBUG_UA_MICROCODE_CHANGED:
848 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
849 TARGET_CHANGED_ASC, MICROCODE_CHANGED_ASCQ);
850 if (debug)
851 cp = "microcode has been changed";
852 break;
853 case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET:
854 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
855 TARGET_CHANGED_ASC,
856 MICROCODE_CHANGED_WO_RESET_ASCQ);
857 if (debug)
858 cp = "microcode has been changed without reset";
859 break;
19c8ead7
EM		 860 case SDEBUG_UA_LUNS_CHANGED:
861 /*
862 * SPC-3 behavior is to report a UNIT ATTENTION with
863 * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN
864 * on the target, until a REPORT LUNS command is
865 * received. SPC-4 behavior is to report it only once.
866 * NOTE: scsi_debug_scsi_level does not use the same
867 * values as struct scsi_device->scsi_level.
868 */
869 if (scsi_debug_scsi_level >= 6) /* SPC-4 and above */
870 clear_luns_changed_on_target(devip);
871 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
872 TARGET_CHANGED_ASC,
873 LUNS_CHANGED_ASCQ);
874 if (debug)
875 cp = "reported luns data has changed";
876 break;
cbf67842
DG		 877 default:
878 pr_warn("%s: unexpected unit attention code=%d\n",
879 __func__, k);
880 if (debug)
881 cp = "unknown";
882 break;
883 }
884 clear_bit(k, devip->uas_bm);
885 if (debug)
886 sdev_printk(KERN_INFO, SCpnt->device,
887 "%s reports: Unit attention: %s\n",
888 my_name, cp);
1da177e4
LT		 889 return check_condition_result;
890 }
cbf67842
DG		 891 if ((UAS_TUR == uas_only) && devip->stopped) {
892 mk_sense_buffer(SCpnt, NOT_READY, LOGICAL_UNIT_NOT_READY,
c65b1445 893 0x2);
cbf67842
DG		 894 if (debug)
895 sdev_printk(KERN_INFO, SCpnt->device,
896 "%s reports: Not ready: %s\n", my_name,
897 "initializing command required");
c65b1445
DG		 898 return check_condition_result;
899 }
1da177e4
LT		 900 return 0;
901}
902
903/* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */
21a61829 904static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1da177e4
LT		 905 int arr_len)
906{
21a61829 907 int act_len;
072d0bb3 908 struct scsi_data_buffer *sdb = scsi_in(scp);
1da177e4 909
072d0bb3 910 if (!sdb->length)
1da177e4 911 return 0;
072d0bb3 912 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
1da177e4 913 return (DID_ERROR << 16);
21a61829
FT		 914
915 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
916 arr, arr_len);
a4517511 917 sdb->resid = scsi_bufflen(scp) - act_len;
21a61829 918
1da177e4
LT		 919 return 0;
920}
921
922/* Returns number of bytes fetched into 'arr' or -1 if error. */
21a61829
FT		 923static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
924 int arr_len)
1da177e4 925{
21a61829 926 if (!scsi_bufflen(scp))
1da177e4 927 return 0;
072d0bb3 928 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE))
1da177e4 929 return -1;
21a61829
FT		 930
931 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
1da177e4
LT		 932}
933
934
935static const char * inq_vendor_id = "Linux ";
936static const char * inq_product_id = "scsi_debug ";
cbf67842 937static const char *inq_product_rev = "0184"; /* version less '.' */
1da177e4 938
cbf67842 939/* Device identification VPD page. Returns number of bytes placed in arr */
5a09e398
HR		 940static int inquiry_evpd_83(unsigned char * arr, int port_group_id,
941 int target_dev_id, int dev_id_num,
942 const char * dev_id_str,
c65b1445 943 int dev_id_str_len)
1da177e4 944{
c65b1445
DG		 945 int num, port_a;
946 char b[32];
1da177e4 947
c65b1445 948 port_a = target_dev_id + 1;
1da177e4
LT		 949 /* T10 vendor identifier field format (faked) */
950 arr[0] = 0x2; /* ASCII */
951 arr[1] = 0x1;
952 arr[2] = 0x0;
953 memcpy(&arr[4], inq_vendor_id, 8);
954 memcpy(&arr[12], inq_product_id, 16);
955 memcpy(&arr[28], dev_id_str, dev_id_str_len);
956 num = 8 + 16 + dev_id_str_len;
957 arr[3] = num;
958 num += 4;
c65b1445
DG		 959 if (dev_id_num >= 0) {
960 /* NAA-5, Logical unit identifier (binary) */
961 arr[num++] = 0x1; /* binary (not necessarily sas) */
962 arr[num++] = 0x3; /* PIV=0, lu, naa */
963 arr[num++] = 0x0;
964 arr[num++] = 0x8;
965 arr[num++] = 0x53; /* naa-5 ieee company id=0x333333 (fake) */
966 arr[num++] = 0x33;
967 arr[num++] = 0x33;
968 arr[num++] = 0x30;
969 arr[num++] = (dev_id_num >> 24);
970 arr[num++] = (dev_id_num >> 16) & 0xff;
971 arr[num++] = (dev_id_num >> 8) & 0xff;
972 arr[num++] = dev_id_num & 0xff;
973 /* Target relative port number */
974 arr[num++] = 0x61; /* proto=sas, binary */
975 arr[num++] = 0x94; /* PIV=1, target port, rel port */
976 arr[num++] = 0x0; /* reserved */
977 arr[num++] = 0x4; /* length */
978 arr[num++] = 0x0; /* reserved */
979 arr[num++] = 0x0; /* reserved */
980 arr[num++] = 0x0;
981 arr[num++] = 0x1; /* relative port A */
982 }
983 /* NAA-5, Target port identifier */
984 arr[num++] = 0x61; /* proto=sas, binary */
985 arr[num++] = 0x93; /* piv=1, target port, naa */
986 arr[num++] = 0x0;
987 arr[num++] = 0x8;
988 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
989 arr[num++] = 0x22;
990 arr[num++] = 0x22;
991 arr[num++] = 0x20;
992 arr[num++] = (port_a >> 24);
993 arr[num++] = (port_a >> 16) & 0xff;
994 arr[num++] = (port_a >> 8) & 0xff;
995 arr[num++] = port_a & 0xff;
5a09e398
HR		 996 /* NAA-5, Target port group identifier */
997 arr[num++] = 0x61; /* proto=sas, binary */
998 arr[num++] = 0x95; /* piv=1, target port group id */
999 arr[num++] = 0x0;
1000 arr[num++] = 0x4;
1001 arr[num++] = 0;
1002 arr[num++] = 0;
1003 arr[num++] = (port_group_id >> 8) & 0xff;
1004 arr[num++] = port_group_id & 0xff;
c65b1445
DG		 1005 /* NAA-5, Target device identifier */
1006 arr[num++] = 0x61; /* proto=sas, binary */
1007 arr[num++] = 0xa3; /* piv=1, target device, naa */
1008 arr[num++] = 0x0;
1009 arr[num++] = 0x8;
1010 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
1011 arr[num++] = 0x22;
1012 arr[num++] = 0x22;
1013 arr[num++] = 0x20;
1014 arr[num++] = (target_dev_id >> 24);
1015 arr[num++] = (target_dev_id >> 16) & 0xff;
1016 arr[num++] = (target_dev_id >> 8) & 0xff;
1017 arr[num++] = target_dev_id & 0xff;
1018 /* SCSI name string: Target device identifier */
1019 arr[num++] = 0x63; /* proto=sas, UTF-8 */
1020 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
1021 arr[num++] = 0x0;
1022 arr[num++] = 24;
1023 memcpy(arr + num, "naa.52222220", 12);
1024 num += 12;
1025 snprintf(b, sizeof(b), "%08X", target_dev_id);
1026 memcpy(arr + num, b, 8);
1027 num += 8;
1028 memset(arr + num, 0, 4);
1029 num += 4;
1030 return num;
1031}
1032
1033
1034static unsigned char vpd84_data[] = {
1035/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
1036 0x22,0x22,0x22,0x0,0xbb,0x1,
1037 0x22,0x22,0x22,0x0,0xbb,0x2,
1038};
1039
cbf67842 1040/* Software interface identification VPD page */
c65b1445
DG		 1041static int inquiry_evpd_84(unsigned char * arr)
1042{
1043 memcpy(arr, vpd84_data, sizeof(vpd84_data));
1044 return sizeof(vpd84_data);
1045}
1046
cbf67842 1047/* Management network addresses VPD page */
c65b1445
DG		 1048static int inquiry_evpd_85(unsigned char * arr)
1049{
1050 int num = 0;
1051 const char * na1 = "https://www.kernel.org/config";
1052 const char * na2 = "http://www.kernel.org/log";
1053 int plen, olen;
1054
1055 arr[num++] = 0x1; /* lu, storage config */
1056 arr[num++] = 0x0; /* reserved */
1057 arr[num++] = 0x0;
1058 olen = strlen(na1);
1059 plen = olen + 1;
1060 if (plen % 4)
1061 plen = ((plen / 4) + 1) * 4;
1062 arr[num++] = plen; /* length, null termianted, padded */
1063 memcpy(arr + num, na1, olen);
1064 memset(arr + num + olen, 0, plen - olen);
1065 num += plen;
1066
1067 arr[num++] = 0x4; /* lu, logging */
1068 arr[num++] = 0x0; /* reserved */
1069 arr[num++] = 0x0;
1070 olen = strlen(na2);
1071 plen = olen + 1;
1072 if (plen % 4)
1073 plen = ((plen / 4) + 1) * 4;
1074 arr[num++] = plen; /* length, null terminated, padded */
1075 memcpy(arr + num, na2, olen);
1076 memset(arr + num + olen, 0, plen - olen);
1077 num += plen;
1078
1079 return num;
1080}
1081
1082/* SCSI ports VPD page */
1083static int inquiry_evpd_88(unsigned char * arr, int target_dev_id)
1084{
1085 int num = 0;
1086 int port_a, port_b;
1087
1088 port_a = target_dev_id + 1;
1089 port_b = port_a + 1;
1090 arr[num++] = 0x0; /* reserved */
1091 arr[num++] = 0x0; /* reserved */
1092 arr[num++] = 0x0;
1093 arr[num++] = 0x1; /* relative port 1 (primary) */
1094 memset(arr + num, 0, 6);
1095 num += 6;
1096 arr[num++] = 0x0;
1097 arr[num++] = 12; /* length tp descriptor */
1098 /* naa-5 target port identifier (A) */
1099 arr[num++] = 0x61; /* proto=sas, binary */
1100 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1101 arr[num++] = 0x0; /* reserved */
1102 arr[num++] = 0x8; /* length */
1103 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
1104 arr[num++] = 0x22;
1105 arr[num++] = 0x22;
1106 arr[num++] = 0x20;
1107 arr[num++] = (port_a >> 24);
1108 arr[num++] = (port_a >> 16) & 0xff;
1109 arr[num++] = (port_a >> 8) & 0xff;
1110 arr[num++] = port_a & 0xff;
1111
1112 arr[num++] = 0x0; /* reserved */
1113 arr[num++] = 0x0; /* reserved */
1114 arr[num++] = 0x0;
1115 arr[num++] = 0x2; /* relative port 2 (secondary) */
1116 memset(arr + num, 0, 6);
1117 num += 6;
1118 arr[num++] = 0x0;
1119 arr[num++] = 12; /* length tp descriptor */
1120 /* naa-5 target port identifier (B) */
1121 arr[num++] = 0x61; /* proto=sas, binary */
1122 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1123 arr[num++] = 0x0; /* reserved */
1124 arr[num++] = 0x8; /* length */
1125 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
1126 arr[num++] = 0x22;
1127 arr[num++] = 0x22;
1128 arr[num++] = 0x20;
1129 arr[num++] = (port_b >> 24);
1130 arr[num++] = (port_b >> 16) & 0xff;
1131 arr[num++] = (port_b >> 8) & 0xff;
1132 arr[num++] = port_b & 0xff;
1133
1134 return num;
1135}
1136
1137
1138static unsigned char vpd89_data[] = {
1139/* from 4th byte */ 0,0,0,0,
1140'l','i','n','u','x',' ',' ',' ',
1141'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
1142'1','2','3','4',
11430x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
11440xec,0,0,0,
11450x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
11460,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
11470x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
11480x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
11490x53,0x41,
11500x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
11510x20,0x20,
11520x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
11530x10,0x80,
11540,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
11550x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
11560x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
11570,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
11580x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
11590x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
11600,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
11610,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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,
11640x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
11650,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
11660xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
11670,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
11680,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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,
11790,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
1180};
1181
cbf67842 1182/* ATA Information VPD page */
c65b1445
DG		 1183static int inquiry_evpd_89(unsigned char * arr)
1184{
1185 memcpy(arr, vpd89_data, sizeof(vpd89_data));
1186 return sizeof(vpd89_data);
1187}
1188
1189
1190static unsigned char vpdb0_data[] = {
1e49f785
DG		 1191 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
1192 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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,
c65b1445
DG		 1195};
1196
cbf67842 1197/* Block limits VPD page (SBC-3) */
c65b1445
DG		 1198static int inquiry_evpd_b0(unsigned char * arr)
1199{
ea61fca5
MP		 1200 unsigned int gran;
1201
c65b1445 1202 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
e308b3d1
MP		 1203
1204 /* Optimal transfer length granularity */
ea61fca5
MP		 1205 gran = 1 << scsi_debug_physblk_exp;
1206 arr[2] = (gran >> 8) & 0xff;
1207 arr[3] = gran & 0xff;
e308b3d1
MP		 1208
1209 /* Maximum Transfer Length */
c65b1445
DG		 1210 if (sdebug_store_sectors > 0x400) {
1211 arr[4] = (sdebug_store_sectors >> 24) & 0xff;
1212 arr[5] = (sdebug_store_sectors >> 16) & 0xff;
1213 arr[6] = (sdebug_store_sectors >> 8) & 0xff;
1214 arr[7] = sdebug_store_sectors & 0xff;
1215 }
44d92694 1216
e308b3d1
MP		 1217 /* Optimal Transfer Length */
1218 put_unaligned_be32(scsi_debug_opt_blks, &arr[8]);
1219
5b94e232 1220 if (scsi_debug_lbpu) {
e308b3d1 1221 /* Maximum Unmap LBA Count */
6014759c 1222 put_unaligned_be32(scsi_debug_unmap_max_blocks, &arr[16]);
e308b3d1
MP		 1223
1224 /* Maximum Unmap Block Descriptor Count */
44d92694
MP		 1225 put_unaligned_be32(scsi_debug_unmap_max_desc, &arr[20]);
1226 }
1227
e308b3d1 1228 /* Unmap Granularity Alignment */
44d92694
MP		 1229 if (scsi_debug_unmap_alignment) {
1230 put_unaligned_be32(scsi_debug_unmap_alignment, &arr[28]);
1231 arr[28] |= 0x80; /* UGAVALID */
1232 }
1233
e308b3d1 1234 /* Optimal Unmap Granularity */
6014759c
MP		 1235 put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]);
1236
5b94e232
MP		 1237 /* Maximum WRITE SAME Length */
1238 put_unaligned_be64(scsi_debug_write_same_length, &arr[32]);
1239
1240 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
44d92694 1241
c65b1445 1242 return sizeof(vpdb0_data);
1da177e4
LT		 1243}
1244
1e49f785 1245/* Block device characteristics VPD page (SBC-3) */
eac6e8e4
MW		 1246static int inquiry_evpd_b1(unsigned char *arr)
1247{
1248 memset(arr, 0, 0x3c);
1249 arr[0] = 0;
1e49f785
DG		 1250 arr[1] = 1; /* non rotating medium (e.g. solid state) */
1251 arr[2] = 0;
1252 arr[3] = 5; /* less than 1.8" */
eac6e8e4
MW		 1253
1254 return 0x3c;
1255}
1da177e4 1256
be1dd78d 1257/* Logical block provisioning VPD page (SBC-3) */
6014759c
MP		 1258static int inquiry_evpd_b2(unsigned char *arr)
1259{
3f0bc3b3 1260 memset(arr, 0, 0x4);
6014759c
MP		 1261 arr[0] = 0; /* threshold exponent */
1262
5b94e232 1263 if (scsi_debug_lbpu)
6014759c
MP		 1264 arr[1] = 1 << 7;
1265
5b94e232 1266 if (scsi_debug_lbpws)
6014759c
MP		 1267 arr[1] |= 1 << 6;
1268
5b94e232
MP		 1269 if (scsi_debug_lbpws10)
1270 arr[1] |= 1 << 5;
1271
be1dd78d
ES		 1272 if (scsi_debug_lbprz)
1273 arr[1] |= 1 << 2;
1274
3f0bc3b3 1275 return 0x4;
6014759c
MP		 1276}
1277
1da177e4 1278#define SDEBUG_LONG_INQ_SZ 96
c65b1445 1279#define SDEBUG_MAX_INQ_ARR_SZ 584
1da177e4 1280
c2248fc9 1281static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1da177e4
LT		 1282{
1283 unsigned char pq_pdt;
5a09e398 1284 unsigned char * arr;
01123ef4 1285 unsigned char *cmd = scp->cmnd;
5a09e398 1286 int alloc_len, n, ret;
c2248fc9 1287 bool have_wlun;
1da177e4
LT		 1288
1289 alloc_len = (cmd[3] << 8) + cmd[4];
6f3cbf55
DG		 1290 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
1291 if (! arr)
1292 return DID_REQUEUE << 16;
34d55434 1293 have_wlun = (scp->device->lun == SCSI_W_LUN_REPORT_LUNS);
c2248fc9 1294 if (have_wlun)
c65b1445
DG		 1295 pq_pdt = 0x1e; /* present, wlun */
1296 else if (scsi_debug_no_lun_0 && (0 == devip->lun))
1297 pq_pdt = 0x7f; /* not present, no device type */
1298 else
1299 pq_pdt = (scsi_debug_ptype & 0x1f);
1da177e4
LT		 1300 arr[0] = pq_pdt;
1301 if (0x2 & cmd[1]) { /* CMDDT bit set */
22017ed2 1302 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
5a09e398 1303 kfree(arr);
1da177e4
LT		 1304 return check_condition_result;
1305 } else if (0x1 & cmd[1]) { /* EVPD bit set */
5a09e398 1306 int lu_id_num, port_group_id, target_dev_id, len;
c65b1445
DG		 1307 char lu_id_str[6];
1308 int host_no = devip->sdbg_host->shost->host_no;
1da177e4 1309
5a09e398
HR		 1310 port_group_id = (((host_no + 1) & 0x7f) << 8) +
1311 (devip->channel & 0x7f);
23183910
DG		 1312 if (0 == scsi_debug_vpd_use_hostno)
1313 host_no = 0;
c2248fc9 1314 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) +
c65b1445
DG		 1315 (devip->target * 1000) + devip->lun);
1316 target_dev_id = ((host_no + 1) * 2000) +
1317 (devip->target * 1000) - 3;
1318 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
1da177e4 1319 if (0 == cmd[2]) { /* supported vital product data pages */
c65b1445
DG		 1320 arr[1] = cmd[2]; /*sanity */
1321 n = 4;
1322 arr[n++] = 0x0; /* this page */
1323 arr[n++] = 0x80; /* unit serial number */
1324 arr[n++] = 0x83; /* device identification */
1325 arr[n++] = 0x84; /* software interface ident. */
1326 arr[n++] = 0x85; /* management network addresses */
1327 arr[n++] = 0x86; /* extended inquiry */
1328 arr[n++] = 0x87; /* mode page policy */
1329 arr[n++] = 0x88; /* SCSI ports */
1330 arr[n++] = 0x89; /* ATA information */
1331 arr[n++] = 0xb0; /* Block limits (SBC) */
eac6e8e4 1332 arr[n++] = 0xb1; /* Block characteristics (SBC) */
5b94e232
MP		 1333 if (scsi_debug_lbp()) /* Logical Block Prov. (SBC) */
1334 arr[n++] = 0xb2;
c65b1445 1335 arr[3] = n - 4; /* number of supported VPD pages */
1da177e4 1336 } else if (0x80 == cmd[2]) { /* unit serial number */
c65b1445 1337 arr[1] = cmd[2]; /*sanity */
1da177e4 1338 arr[3] = len;
c65b1445 1339 memcpy(&arr[4], lu_id_str, len);
1da177e4 1340 } else if (0x83 == cmd[2]) { /* device identification */
c65b1445 1341 arr[1] = cmd[2]; /*sanity */
5a09e398
HR		 1342 arr[3] = inquiry_evpd_83(&arr[4], port_group_id,
1343 target_dev_id, lu_id_num,
1344 lu_id_str, len);
c65b1445
DG		 1345 } else if (0x84 == cmd[2]) { /* Software interface ident. */
1346 arr[1] = cmd[2]; /*sanity */
1347 arr[3] = inquiry_evpd_84(&arr[4]);
1348 } else if (0x85 == cmd[2]) { /* Management network addresses */
1349 arr[1] = cmd[2]; /*sanity */
1350 arr[3] = inquiry_evpd_85(&arr[4]);
1351 } else if (0x86 == cmd[2]) { /* extended inquiry */
1352 arr[1] = cmd[2]; /*sanity */
1353 arr[3] = 0x3c; /* number of following entries */
c6a44287
MP		 1354 if (scsi_debug_dif == SD_DIF_TYPE3_PROTECTION)
1355 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
1356 else if (scsi_debug_dif)
1357 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
1358 else
1359 arr[4] = 0x0; /* no protection stuff */
c65b1445
DG		 1360 arr[5] = 0x7; /* head of q, ordered + simple q's */
1361 } else if (0x87 == cmd[2]) { /* mode page policy */
1362 arr[1] = cmd[2]; /*sanity */
1363 arr[3] = 0x8; /* number of following entries */
1364 arr[4] = 0x2; /* disconnect-reconnect mp */
1365 arr[6] = 0x80; /* mlus, shared */
1366 arr[8] = 0x18; /* protocol specific lu */
1367 arr[10] = 0x82; /* mlus, per initiator port */
1368 } else if (0x88 == cmd[2]) { /* SCSI Ports */
1369 arr[1] = cmd[2]; /*sanity */
1370 arr[3] = inquiry_evpd_88(&arr[4], target_dev_id);
1371 } else if (0x89 == cmd[2]) { /* ATA information */
1372 arr[1] = cmd[2]; /*sanity */
1373 n = inquiry_evpd_89(&arr[4]);
1374 arr[2] = (n >> 8);
1375 arr[3] = (n & 0xff);
1376 } else if (0xb0 == cmd[2]) { /* Block limits (SBC) */
1377 arr[1] = cmd[2]; /*sanity */
1378 arr[3] = inquiry_evpd_b0(&arr[4]);
eac6e8e4
MW		 1379 } else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */
1380 arr[1] = cmd[2]; /*sanity */
1381 arr[3] = inquiry_evpd_b1(&arr[4]);
5b94e232 1382 } else if (0xb2 == cmd[2]) { /* Logical Block Prov. (SBC) */
6014759c
MP		 1383 arr[1] = cmd[2]; /*sanity */
1384 arr[3] = inquiry_evpd_b2(&arr[4]);
1da177e4 1385 } else {
22017ed2 1386 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
5a09e398 1387 kfree(arr);
1da177e4
LT		 1388 return check_condition_result;
1389 }
c65b1445 1390 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
5a09e398 1391 ret = fill_from_dev_buffer(scp, arr,
c65b1445 1392 min(len, SDEBUG_MAX_INQ_ARR_SZ));
5a09e398
HR		 1393 kfree(arr);
1394 return ret;
1da177e4
LT		 1395 }
1396 /* drops through here for a standard inquiry */
d986788b 1397 arr[1] = scsi_debug_removable ? 0x80 : 0; /* Removable disk */
1da177e4
LT		 1398 arr[2] = scsi_debug_scsi_level;
1399 arr[3] = 2; /* response_data_format==2 */
1400 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
c6a44287 1401 arr[5] = scsi_debug_dif ? 1 : 0; /* PROTECT bit */
5a09e398
HR		 1402 if (0 == scsi_debug_vpd_use_hostno)
1403 arr[5] = 0x10; /* claim: implicit TGPS */
c65b1445 1404 arr[6] = 0x10; /* claim: MultiP */
1da177e4 1405 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
c65b1445 1406 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
1da177e4
LT		 1407 memcpy(&arr[8], inq_vendor_id, 8);
1408 memcpy(&arr[16], inq_product_id, 16);
1409 memcpy(&arr[32], inq_product_rev, 4);
1410 /* version descriptors (2 bytes each) follow */
e46b0344
DG		 1411 arr[58] = 0x0; arr[59] = 0xa2; /* SAM-5 rev 4 */
1412 arr[60] = 0x4; arr[61] = 0x68; /* SPC-4 rev 37 */
c65b1445 1413 n = 62;
1da177e4 1414 if (scsi_debug_ptype == 0) {
e46b0344 1415 arr[n++] = 0x4; arr[n++] = 0xc5; /* SBC-4 rev 36 */
1da177e4 1416 } else if (scsi_debug_ptype == 1) {
e46b0344 1417 arr[n++] = 0x5; arr[n++] = 0x25; /* SSC-4 rev 3 */
1da177e4 1418 }
e46b0344 1419 arr[n++] = 0x20; arr[n++] = 0xe6; /* SPL-3 rev 7 */
5a09e398 1420 ret = fill_from_dev_buffer(scp, arr,
1da177e4 1421 min(alloc_len, SDEBUG_LONG_INQ_SZ));
5a09e398
HR		 1422 kfree(arr);
1423 return ret;
1da177e4
LT		 1424}
1425
1426static int resp_requests(struct scsi_cmnd * scp,
1427 struct sdebug_dev_info * devip)
1428{
1429 unsigned char * sbuff;
01123ef4 1430 unsigned char *cmd = scp->cmnd;
cbf67842 1431 unsigned char arr[SCSI_SENSE_BUFFERSIZE];
c2248fc9 1432 bool dsense, want_dsense;
1da177e4
LT		 1433 int len = 18;
1434
c65b1445 1435 memset(arr, 0, sizeof(arr));
c2248fc9
DG		 1436 dsense = !!(cmd[1] & 1);
1437 want_dsense = dsense || scsi_debug_dsense;
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 }
2784 do_div(lba, scsi_debug_unmap_granularity);
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
DG		 3943 struct sdebug_queued_cmd *sqcp = NULL;
3944 struct scsi_device *sdp = cmnd->device;
3945
3946 if (NULL == cmnd || NULL == devip) {
c1287970 3947 pr_warn("called with NULL cmnd or devip pointer\n");
cbf67842
DG		 3948 /* no particularly good error to report back */
3949 return SCSI_MLQUEUE_HOST_BUSY;
3950 }
3951 if ((scsi_result) && (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
3952 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
3953 __func__, scsi_result);
cd62b7da
DG		 3954 if (delta_jiff == 0)
3955 goto respond_in_thread;
1da177e4 3956
cd62b7da 3957 /* schedule the response at a later time if resources permit */
cbf67842
DG		 3958 spin_lock_irqsave(&queued_arr_lock, iflags);
3959 num_in_q = atomic_read(&devip->num_in_q);
3960 qdepth = cmnd->device->queue_depth;
cbf67842 3961 inject = 0;
cd62b7da
DG		 3962 if ((qdepth > 0) && (num_in_q >= qdepth)) {
3963 if (scsi_result) {
3964 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3965 goto respond_in_thread;
3966 } else
3967 scsi_result = device_qfull_result;
3968 } else if ((scsi_debug_every_nth != 0) &&
3969 (SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts) &&
3970 (scsi_result == 0)) {
cbf67842
DG		 3971 if ((num_in_q == (qdepth - 1)) &&
3972 (atomic_inc_return(&sdebug_a_tsf) >=
3973 abs(scsi_debug_every_nth))) {
3974 atomic_set(&sdebug_a_tsf, 0);
3975 inject = 1;
cd62b7da 3976 scsi_result = device_qfull_result;
1da177e4
LT		 3977 }
3978 }
1da177e4 3979
cd62b7da 3980 k = find_first_zero_bit(queued_in_use_bm, scsi_debug_max_queue);
cbf67842 3981 if (k >= scsi_debug_max_queue) {
cbf67842 3982 spin_unlock_irqrestore(&queued_arr_lock, iflags);
cd62b7da
DG		 3983 if (scsi_result)
3984 goto respond_in_thread;
3985 else if (SCSI_DEBUG_OPT_ALL_TSF & scsi_debug_opts)
3986 scsi_result = device_qfull_result;
cbf67842
DG		 3987 if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts)
3988 sdev_printk(KERN_INFO, sdp,
cd62b7da
DG		 3989 "%s: max_queue=%d exceeded, %s\n",
3990 __func__, scsi_debug_max_queue,
3991 (scsi_result ? "status: TASK SET FULL" :
3992 "report: host busy"));
3993 if (scsi_result)
3994 goto respond_in_thread;
3995 else
cbf67842
DG		 3996 return SCSI_MLQUEUE_HOST_BUSY;
3997 }
3998 __set_bit(k, queued_in_use_bm);
3999 atomic_inc(&devip->num_in_q);
4000 sqcp = &queued_arr[k];
4001 sqcp->a_cmnd = cmnd;
4002 cmnd->result = scsi_result;
4003 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4004 if (delta_jiff > 0) {
4005 if (NULL == sqcp->cmnd_timerp) {
4006 sqcp->cmnd_timerp = kmalloc(sizeof(struct timer_list),
4007 GFP_ATOMIC);
4008 if (NULL == sqcp->cmnd_timerp)
4009 return SCSI_MLQUEUE_HOST_BUSY;
4010 init_timer(sqcp->cmnd_timerp);
1da177e4 4011 }
cbf67842
DG		 4012 sqcp->cmnd_timerp->function = sdebug_q_cmd_complete;
4013 sqcp->cmnd_timerp->data = k;
4014 sqcp->cmnd_timerp->expires = get_jiffies_64() + delta_jiff;
4015 add_timer(sqcp->cmnd_timerp);
4016 } else if (scsi_debug_ndelay > 0) {
4017 ktime_t kt = ktime_set(0, scsi_debug_ndelay);
4018 struct sdebug_hrtimer *sd_hp = sqcp->sd_hrtp;
4019
4020 if (NULL == sd_hp) {
4021 sd_hp = kmalloc(sizeof(*sd_hp), GFP_ATOMIC);
4022 if (NULL == sd_hp)
4023 return SCSI_MLQUEUE_HOST_BUSY;
4024 sqcp->sd_hrtp = sd_hp;
4025 hrtimer_init(&sd_hp->hrt, CLOCK_MONOTONIC,
4026 HRTIMER_MODE_REL);
4027 sd_hp->hrt.function = sdebug_q_cmd_hrt_complete;
4028 sd_hp->qa_indx = k;
1da177e4 4029 }
cbf67842
DG		 4030 hrtimer_start(&sd_hp->hrt, kt, HRTIMER_MODE_REL);
4031 } else { /* delay < 0 */
4032 if (NULL == sqcp->tletp) {
4033 sqcp->tletp = kmalloc(sizeof(*sqcp->tletp),
4034 GFP_ATOMIC);
4035 if (NULL == sqcp->tletp)
4036 return SCSI_MLQUEUE_HOST_BUSY;
4037 tasklet_init(sqcp->tletp,
4038 sdebug_q_cmd_complete, k);
4039 }
4040 if (-1 == delta_jiff)
4041 tasklet_hi_schedule(sqcp->tletp);
4042 else
4043 tasklet_schedule(sqcp->tletp);
1da177e4 4044 }
cd62b7da
DG		 4045 if ((SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) &&
4046 (scsi_result == device_qfull_result))
cbf67842
DG		 4047 sdev_printk(KERN_INFO, sdp,
4048 "%s: num_in_q=%d +1, %s%s\n", __func__,
4049 num_in_q, (inject ? "<inject> " : ""),
4050 "status: TASK SET FULL");
4051 return 0;
cd62b7da
DG		 4052
4053respond_in_thread: /* call back to mid-layer using invocation thread */
4054 cmnd->result = scsi_result;
4055 cmnd->scsi_done(cmnd);
4056 return 0;
1da177e4 4057}
cbf67842 4058
23183910
DG		 4059/* Note: The following macros create attribute files in the
4060 /sys/module/scsi_debug/parameters directory. Unfortunately this
4061 driver is unaware of a change and cannot trigger auxiliary actions
4062 as it can when the corresponding attribute in the
4063 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
4064 */
c65b1445 4065module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR);
5b94e232 4066module_param_named(ato, scsi_debug_ato, int, S_IRUGO);
0759c666 4067module_param_named(clustering, scsi_debug_clustering, bool, S_IRUGO | S_IWUSR);
c65b1445
DG		 4068module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR);
4069module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO);
5b94e232
MP		 4070module_param_named(dif, scsi_debug_dif, int, S_IRUGO);
4071module_param_named(dix, scsi_debug_dix, int, S_IRUGO);
c65b1445
DG		 4072module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR);
4073module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR);
23183910 4074module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR);
68aee7ba 4075module_param_named(guard, scsi_debug_guard, uint, S_IRUGO);
cbf67842 4076module_param_named(host_lock, scsi_debug_host_lock, bool, S_IRUGO | S_IWUSR);
5b94e232
MP		 4077module_param_named(lbpu, scsi_debug_lbpu, int, S_IRUGO);
4078module_param_named(lbpws, scsi_debug_lbpws, int, S_IRUGO);
4079module_param_named(lbpws10, scsi_debug_lbpws10, int, S_IRUGO);
be1dd78d 4080module_param_named(lbprz, scsi_debug_lbprz, int, S_IRUGO);
5b94e232 4081module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO);
c65b1445 4082module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR);
78d4e5a0 4083module_param_named(max_queue, scsi_debug_max_queue, int, S_IRUGO | S_IWUSR);
cbf67842 4084module_param_named(ndelay, scsi_debug_ndelay, int, S_IRUGO | S_IWUSR);
c65b1445 4085module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR);
78d4e5a0 4086module_param_named(no_uld, scsi_debug_no_uld, int, S_IRUGO);
c65b1445
DG		 4087module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO);
4088module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR);
5b94e232 4089module_param_named(opt_blks, scsi_debug_opt_blks, int, S_IRUGO);
c65b1445 4090module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR);
5b94e232 4091module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO);
c65b1445 4092module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR);
d986788b 4093module_param_named(removable, scsi_debug_removable, bool, S_IRUGO | S_IWUSR);
c65b1445 4094module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO);
597136ab 4095module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO);
c2248fc9 4096module_param_named(strict, scsi_debug_strict, bool, S_IRUGO | S_IWUSR);
5b94e232
MP		 4097module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO);
4098module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO);
44d92694
MP		 4099module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO);
4100module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, int, S_IRUGO);
5b94e232
MP		 4101module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR);
4102module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int,
4103 S_IRUGO | S_IWUSR);
4104module_param_named(write_same_length, scsi_debug_write_same_length, int,
4105 S_IRUGO | S_IWUSR);
1da177e4
LT		 4106
4107MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
4108MODULE_DESCRIPTION("SCSI debug adapter driver");
4109MODULE_LICENSE("GPL");
4110MODULE_VERSION(SCSI_DEBUG_VERSION);
4111
4112MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
5b94e232 4113MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
0759c666 4114MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
cbf67842 4115MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
c2248fc9 4116MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)");
5b94e232
MP		 4117MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
4118MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
c65b1445 4119MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
beb87c33 4120MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
23183910 4121MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
5b94e232 4122MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
cbf67842 4123MODULE_PARM_DESC(host_lock, "use host_lock around all commands (def=0)");
5b94e232
MP		 4124MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
4125MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
4126MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
be1dd78d 4127MODULE_PARM_DESC(lbprz, "unmapped blocks return 0 on read (def=1)");
5b94e232 4128MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
c65b1445 4129MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
cbf67842
DG		 4130MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
4131MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
c65b1445 4132MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
78d4e5a0 4133MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
1da177e4 4134MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
c65b1445 4135MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
5b94e232 4136MODULE_PARM_DESC(opt_blks, "optimal transfer length in block (def=64)");
6f3cbf55 4137MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
5b94e232 4138MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
1da177e4 4139MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
d986788b 4140MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
e46b0344 4141MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=6[SPC-4])");
ea61fca5 4142MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
c2248fc9 4143MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)");
5b94e232
MP		 4144MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
4145MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
6014759c
MP		 4146MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
4147MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
c2248fc9 4148MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)");
5b94e232
MP		 4149MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
4150MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
1da177e4
LT		 4151
4152static char sdebug_info[256];
4153
4154static const char * scsi_debug_info(struct Scsi_Host * shp)
4155{
4156 sprintf(sdebug_info, "scsi_debug, version %s [%s], "
4157 "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION,
4158 scsi_debug_version_date, scsi_debug_dev_size_mb,
4159 scsi_debug_opts);
4160 return sdebug_info;
4161}
4162
cbf67842 4163/* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */
c8ed555a 4164static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer, int length)
1da177e4 4165{
c8ed555a
AV		 4166 char arr[16];
4167 int opts;
4168 int minLen = length > 15 ? 15 : length;
1da177e4 4169
c8ed555a
AV		 4170 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
4171 return -EACCES;
4172 memcpy(arr, buffer, minLen);
4173 arr[minLen] = '\0';
4174 if (1 != sscanf(arr, "%d", &opts))
4175 return -EINVAL;
4176 scsi_debug_opts = opts;
4177 if (scsi_debug_every_nth != 0)
cbf67842 4178 atomic_set(&sdebug_cmnd_count, 0);
c8ed555a
AV		 4179 return length;
4180}
1da177e4 4181
cbf67842
DG		 4182/* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the
4183 * same for each scsi_debug host (if more than one). Some of the counters
4184 * output are not atomics so might be inaccurate in a busy system. */
c8ed555a
AV		 4185static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
4186{
cbf67842
DG		 4187 int f, l;
4188 char b[32];
4189
4190 if (scsi_debug_every_nth > 0)
4191 snprintf(b, sizeof(b), " (curr:%d)",
4192 ((SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts) ?
4193 atomic_read(&sdebug_a_tsf) :
4194 atomic_read(&sdebug_cmnd_count)));
4195 else
4196 b[0] = '\0';
4197
4198 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n"
4199 "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, "
4200 "every_nth=%d%s\n"
4201 "delay=%d, ndelay=%d, max_luns=%d, q_completions=%d\n"
4202 "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n"
4203 "command aborts=%d; RESETs: device=%d, target=%d, bus=%d, "
4204 "host=%d\ndix_reads=%d dix_writes=%d dif_errors=%d "
4205 "usec_in_jiffy=%lu\n",
4206 SCSI_DEBUG_VERSION, scsi_debug_version_date,
4207 scsi_debug_num_tgts, scsi_debug_dev_size_mb, scsi_debug_opts,
4208 scsi_debug_every_nth, b, scsi_debug_delay, scsi_debug_ndelay,
4209 scsi_debug_max_luns, atomic_read(&sdebug_completions),
4210 scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads,
4211 sdebug_sectors_per, num_aborts, num_dev_resets,
4212 num_target_resets, num_bus_resets, num_host_resets,
4213 dix_reads, dix_writes, dif_errors, TICK_NSEC / 1000);
4214
4215 f = find_first_bit(queued_in_use_bm, scsi_debug_max_queue);
4216 if (f != scsi_debug_max_queue) {
4217 l = find_last_bit(queued_in_use_bm, scsi_debug_max_queue);
4218 seq_printf(m, " %s BUSY: first,last bits set: %d,%d\n",
4219 "queued_in_use_bm", f, l);
4220 }
c8ed555a 4221 return 0;
1da177e4
LT		 4222}
4223
82069379 4224static ssize_t delay_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4225{
4226 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay);
4227}
cbf67842 4228/* Returns -EBUSY if delay is being changed and commands are queued */
82069379
AM		 4229static ssize_t delay_store(struct device_driver *ddp, const char *buf,
4230 size_t count)
1da177e4 4231{
cbf67842
DG		 4232 int delay, res;
4233
4234 if ((count > 0) && (1 == sscanf(buf, "%d", &delay))) {
4235 res = count;
4236 if (scsi_debug_delay != delay) {
4237 unsigned long iflags;
4238 int k;
4239
4240 spin_lock_irqsave(&queued_arr_lock, iflags);
4241 k = find_first_bit(queued_in_use_bm,
4242 scsi_debug_max_queue);
4243 if (k != scsi_debug_max_queue)
4244 res = -EBUSY; /* have queued commands */
4245 else {
4246 scsi_debug_delay = delay;
4247 scsi_debug_ndelay = 0;
4248 }
4249 spin_unlock_irqrestore(&queued_arr_lock, iflags);
1da177e4 4250 }
cbf67842 4251 return res;
1da177e4
LT		 4252 }
4253 return -EINVAL;
4254}
82069379 4255static DRIVER_ATTR_RW(delay);
1da177e4 4256
cbf67842
DG		 4257static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
4258{
4259 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ndelay);
4260}
4261/* Returns -EBUSY if ndelay is being changed and commands are queued */
4262/* If > 0 and accepted then scsi_debug_delay is set to DELAY_OVERRIDDEN */
4263static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
4264 size_t count)
4265{
4266 unsigned long iflags;
4267 int ndelay, res, k;
4268
4269 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
4270 (ndelay >= 0) && (ndelay < 1000000000)) {
4271 res = count;
4272 if (scsi_debug_ndelay != ndelay) {
4273 spin_lock_irqsave(&queued_arr_lock, iflags);
4274 k = find_first_bit(queued_in_use_bm,
4275 scsi_debug_max_queue);
4276 if (k != scsi_debug_max_queue)
4277 res = -EBUSY; /* have queued commands */
4278 else {
4279 scsi_debug_ndelay = ndelay;
4280 scsi_debug_delay = ndelay ? DELAY_OVERRIDDEN
4281 : DEF_DELAY;
4282 }
4283 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4284 }
4285 return res;
4286 }
4287 return -EINVAL;
4288}
4289static DRIVER_ATTR_RW(ndelay);
4290
82069379 4291static ssize_t opts_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4292{
4293 return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts);
4294}
4295
82069379
AM		 4296static ssize_t opts_store(struct device_driver *ddp, const char *buf,
4297 size_t count)
1da177e4
LT		 4298{
4299 int opts;
4300 char work[20];
4301
4302 if (1 == sscanf(buf, "%10s", work)) {
48a96876 4303 if (0 == strncasecmp(work,"0x", 2)) {
1da177e4
LT		 4304 if (1 == sscanf(&work[2], "%x", &opts))
4305 goto opts_done;
4306 } else {
4307 if (1 == sscanf(work, "%d", &opts))
4308 goto opts_done;
4309 }
4310 }
4311 return -EINVAL;
4312opts_done:
4313 scsi_debug_opts = opts;
817fd66b
DG		 4314 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
4315 sdebug_any_injecting_opt = true;
4316 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
4317 sdebug_any_injecting_opt = true;
4318 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
4319 sdebug_any_injecting_opt = true;
4320 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
4321 sdebug_any_injecting_opt = true;
4322 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
4323 sdebug_any_injecting_opt = true;
cbf67842
DG		 4324 atomic_set(&sdebug_cmnd_count, 0);
4325 atomic_set(&sdebug_a_tsf, 0);
1da177e4
LT		 4326 return count;
4327}
82069379 4328static DRIVER_ATTR_RW(opts);
1da177e4 4329
82069379 4330static ssize_t ptype_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4331{
4332 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype);
4333}
82069379
AM		 4334static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
4335 size_t count)
1da177e4
LT		 4336{
4337 int n;
4338
4339 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4340 scsi_debug_ptype = n;
4341 return count;
4342 }
4343 return -EINVAL;
4344}
82069379 4345static DRIVER_ATTR_RW(ptype);
1da177e4 4346
82069379 4347static ssize_t dsense_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4348{
4349 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense);
4350}
82069379
AM		 4351static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
4352 size_t count)
1da177e4
LT		 4353{
4354 int n;
4355
4356 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4357 scsi_debug_dsense = n;
4358 return count;
4359 }
4360 return -EINVAL;
4361}
82069379 4362static DRIVER_ATTR_RW(dsense);
1da177e4 4363
82069379 4364static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
23183910
DG		 4365{
4366 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw);
4367}
82069379
AM		 4368static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
4369 size_t count)
23183910
DG		 4370{
4371 int n;
4372
4373 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
cbf67842
DG		 4374 n = (n > 0);
4375 scsi_debug_fake_rw = (scsi_debug_fake_rw > 0);
4376 if (scsi_debug_fake_rw != n) {
4377 if ((0 == n) && (NULL == fake_storep)) {
4378 unsigned long sz =
4379 (unsigned long)scsi_debug_dev_size_mb *
4380 1048576;
4381
4382 fake_storep = vmalloc(sz);
4383 if (NULL == fake_storep) {
c1287970 4384 pr_err("out of memory, 9\n");
cbf67842
DG		 4385 return -ENOMEM;
4386 }
4387 memset(fake_storep, 0, sz);
4388 }
4389 scsi_debug_fake_rw = n;
4390 }
23183910
DG		 4391 return count;
4392 }
4393 return -EINVAL;
4394}
82069379 4395static DRIVER_ATTR_RW(fake_rw);
23183910 4396
82069379 4397static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
c65b1445
DG		 4398{
4399 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0);
4400}
82069379
AM		 4401static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
4402 size_t count)
c65b1445
DG		 4403{
4404 int n;
4405
4406 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4407 scsi_debug_no_lun_0 = n;
4408 return count;
4409 }
4410 return -EINVAL;
4411}
82069379 4412static DRIVER_ATTR_RW(no_lun_0);
c65b1445 4413
82069379 4414static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4415{
4416 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts);
4417}
82069379
AM		 4418static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
4419 size_t count)
1da177e4
LT		 4420{
4421 int n;
4422
4423 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4424 scsi_debug_num_tgts = n;
4425 sdebug_max_tgts_luns();
4426 return count;
4427 }
4428 return -EINVAL;
4429}
82069379 4430static DRIVER_ATTR_RW(num_tgts);
1da177e4 4431
82069379 4432static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4433{
4434 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb);
4435}
82069379 4436static DRIVER_ATTR_RO(dev_size_mb);
1da177e4 4437
82069379 4438static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4439{
4440 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts);
4441}
82069379 4442static DRIVER_ATTR_RO(num_parts);
1da177e4 4443
82069379 4444static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4445{
4446 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth);
4447}
82069379
AM		 4448static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
4449 size_t count)
1da177e4
LT		 4450{
4451 int nth;
4452
4453 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
4454 scsi_debug_every_nth = nth;
cbf67842 4455 atomic_set(&sdebug_cmnd_count, 0);
1da177e4
LT		 4456 return count;
4457 }
4458 return -EINVAL;
4459}
82069379 4460static DRIVER_ATTR_RW(every_nth);
1da177e4 4461
82069379 4462static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4463{
4464 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns);
4465}
82069379
AM		 4466static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
4467 size_t count)
1da177e4
LT		 4468{
4469 int n;
19c8ead7 4470 bool changed;
1da177e4
LT		 4471
4472 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
19c8ead7 4473 changed = (scsi_debug_max_luns != n);
1da177e4
LT		 4474 scsi_debug_max_luns = n;
4475 sdebug_max_tgts_luns();
19c8ead7
EM		 4476 if (changed && (scsi_debug_scsi_level >= 5)) { /* >= SPC-3 */
4477 struct sdebug_host_info *sdhp;
4478 struct sdebug_dev_info *dp;
4479
4480 spin_lock(&sdebug_host_list_lock);
4481 list_for_each_entry(sdhp, &sdebug_host_list,
4482 host_list) {
4483 list_for_each_entry(dp, &sdhp->dev_info_list,
4484 dev_list) {
4485 set_bit(SDEBUG_UA_LUNS_CHANGED,
4486 dp->uas_bm);
4487 }
4488 }
4489 spin_unlock(&sdebug_host_list_lock);
4490 }
1da177e4
LT		 4491 return count;
4492 }
4493 return -EINVAL;
4494}
82069379 4495static DRIVER_ATTR_RW(max_luns);
1da177e4 4496
82069379 4497static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
78d4e5a0
DG		 4498{
4499 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_queue);
4500}
cbf67842
DG		 4501/* N.B. max_queue can be changed while there are queued commands. In flight
4502 * commands beyond the new max_queue will be completed. */
82069379
AM		 4503static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
4504 size_t count)
78d4e5a0 4505{
cbf67842
DG		 4506 unsigned long iflags;
4507 int n, k;
78d4e5a0
DG		 4508
4509 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
4510 (n <= SCSI_DEBUG_CANQUEUE)) {
cbf67842
DG		 4511 spin_lock_irqsave(&queued_arr_lock, iflags);
4512 k = find_last_bit(queued_in_use_bm, SCSI_DEBUG_CANQUEUE);
78d4e5a0 4513 scsi_debug_max_queue = n;
cbf67842
DG		 4514 if (SCSI_DEBUG_CANQUEUE == k)
4515 atomic_set(&retired_max_queue, 0);
4516 else if (k >= n)
4517 atomic_set(&retired_max_queue, k + 1);
4518 else
4519 atomic_set(&retired_max_queue, 0);
4520 spin_unlock_irqrestore(&queued_arr_lock, iflags);
78d4e5a0
DG		 4521 return count;
4522 }
4523 return -EINVAL;
4524}
82069379 4525static DRIVER_ATTR_RW(max_queue);
78d4e5a0 4526
82069379 4527static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
78d4e5a0
DG		 4528{
4529 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_uld);
4530}
82069379 4531static DRIVER_ATTR_RO(no_uld);
78d4e5a0 4532
82069379 4533static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4534{
4535 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level);
4536}
82069379 4537static DRIVER_ATTR_RO(scsi_level);
1da177e4 4538
82069379 4539static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
c65b1445
DG		 4540{
4541 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb);
4542}
82069379
AM		 4543static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
4544 size_t count)
c65b1445 4545{
c2248fc9 4546 int n;
0d01c5df 4547 bool changed;
c65b1445
DG		 4548
4549 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
0d01c5df 4550 changed = (scsi_debug_virtual_gb != n);
c65b1445 4551 scsi_debug_virtual_gb = n;
28898873 4552 sdebug_capacity = get_sdebug_capacity();
0d01c5df
DG		 4553 if (changed) {
4554 struct sdebug_host_info *sdhp;
4555 struct sdebug_dev_info *dp;
4556
4bc6b634 4557 spin_lock(&sdebug_host_list_lock);
0d01c5df
DG		 4558 list_for_each_entry(sdhp, &sdebug_host_list,
4559 host_list) {
4560 list_for_each_entry(dp, &sdhp->dev_info_list,
4561 dev_list) {
4562 set_bit(SDEBUG_UA_CAPACITY_CHANGED,
4563 dp->uas_bm);
4564 }
4565 }
4bc6b634 4566 spin_unlock(&sdebug_host_list_lock);
0d01c5df 4567 }
c65b1445
DG		 4568 return count;
4569 }
4570 return -EINVAL;
4571}
82069379 4572static DRIVER_ATTR_RW(virtual_gb);
c65b1445 4573
82069379 4574static ssize_t add_host_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4575{
4576 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host);
4577}
4578
82069379
AM		 4579static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
4580 size_t count)
1da177e4 4581{
f3df41cf 4582 int delta_hosts;
1da177e4 4583
f3df41cf 4584 if (sscanf(buf, "%d", &delta_hosts) != 1)
1da177e4 4585 return -EINVAL;
1da177e4
LT		 4586 if (delta_hosts > 0) {
4587 do {
4588 sdebug_add_adapter();
4589 } while (--delta_hosts);
4590 } else if (delta_hosts < 0) {
4591 do {
4592 sdebug_remove_adapter();
4593 } while (++delta_hosts);
4594 }
4595 return count;
4596}
82069379 4597static DRIVER_ATTR_RW(add_host);
1da177e4 4598
82069379 4599static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
23183910
DG		 4600{
4601 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_vpd_use_hostno);
4602}
82069379
AM		 4603static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
4604 size_t count)
23183910
DG		 4605{
4606 int n;
4607
4608 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4609 scsi_debug_vpd_use_hostno = n;
4610 return count;
4611 }
4612 return -EINVAL;
4613}
82069379 4614static DRIVER_ATTR_RW(vpd_use_hostno);
23183910 4615
82069379 4616static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
597136ab
MP		 4617{
4618 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size);
4619}
82069379 4620static DRIVER_ATTR_RO(sector_size);
597136ab 4621
82069379 4622static ssize_t dix_show(struct device_driver *ddp, char *buf)
c6a44287
MP		 4623{
4624 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix);
4625}
82069379 4626static DRIVER_ATTR_RO(dix);
c6a44287 4627
82069379 4628static ssize_t dif_show(struct device_driver *ddp, char *buf)
c6a44287
MP		 4629{
4630 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif);
4631}
82069379 4632static DRIVER_ATTR_RO(dif);
c6a44287 4633
82069379 4634static ssize_t guard_show(struct device_driver *ddp, char *buf)
c6a44287 4635{
68aee7ba 4636 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_guard);
c6a44287 4637}
82069379 4638static DRIVER_ATTR_RO(guard);
c6a44287 4639
82069379 4640static ssize_t ato_show(struct device_driver *ddp, char *buf)
c6a44287
MP		 4641{
4642 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato);
4643}
82069379 4644static DRIVER_ATTR_RO(ato);
c6a44287 4645
82069379 4646static ssize_t map_show(struct device_driver *ddp, char *buf)
44d92694
MP		 4647{
4648 ssize_t count;
4649
5b94e232 4650 if (!scsi_debug_lbp())
44d92694
MP		 4651 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
4652 sdebug_store_sectors);
4653
c7badc90
TH		 4654 count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
4655 (int)map_size, map_storep);
44d92694 4656 buf[count++] = '\n';
c7badc90 4657 buf[count] = '\0';
44d92694
MP		 4658
4659 return count;
4660}
82069379 4661static DRIVER_ATTR_RO(map);
44d92694 4662
82069379 4663static ssize_t removable_show(struct device_driver *ddp, char *buf)
d986788b
MP		 4664{
4665 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_removable ? 1 : 0);
4666}
82069379
AM		 4667static ssize_t removable_store(struct device_driver *ddp, const char *buf,
4668 size_t count)
d986788b
MP		 4669{
4670 int n;
4671
4672 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4673 scsi_debug_removable = (n > 0);
4674 return count;
4675 }
4676 return -EINVAL;
4677}
82069379 4678static DRIVER_ATTR_RW(removable);
d986788b 4679
cbf67842
DG		 4680static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
4681{
4682 return scnprintf(buf, PAGE_SIZE, "%d\n", !!scsi_debug_host_lock);
4683}
4684/* Returns -EBUSY if host_lock is being changed and commands are queued */
4685static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
4686 size_t count)
4687{
4688 int n, res;
4689
4690 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4691 bool new_host_lock = (n > 0);
4692
4693 res = count;
4694 if (new_host_lock != scsi_debug_host_lock) {
4695 unsigned long iflags;
4696 int k;
4697
4698 spin_lock_irqsave(&queued_arr_lock, iflags);
4699 k = find_first_bit(queued_in_use_bm,
4700 scsi_debug_max_queue);
4701 if (k != scsi_debug_max_queue)
4702 res = -EBUSY; /* have queued commands */
4703 else
4704 scsi_debug_host_lock = new_host_lock;
4705 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4706 }
4707 return res;
4708 }
4709 return -EINVAL;
4710}
4711static DRIVER_ATTR_RW(host_lock);
4712
c2248fc9
DG		 4713static ssize_t strict_show(struct device_driver *ddp, char *buf)
4714{
4715 return scnprintf(buf, PAGE_SIZE, "%d\n", !!scsi_debug_strict);
4716}
4717static ssize_t strict_store(struct device_driver *ddp, const char *buf,
4718 size_t count)
4719{
4720 int n;
4721
4722 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4723 scsi_debug_strict = (n > 0);
4724 return count;
4725 }
4726 return -EINVAL;
4727}
4728static DRIVER_ATTR_RW(strict);
4729
cbf67842 4730
82069379 4731/* Note: The following array creates attribute files in the
23183910
DG		 4732 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
4733 files (over those found in the /sys/module/scsi_debug/parameters
4734 directory) is that auxiliary actions can be triggered when an attribute
4735 is changed. For example see: sdebug_add_host_store() above.
4736 */
6ecaff7f 4737
82069379
AM		 4738static struct attribute *sdebug_drv_attrs[] = {
4739 &driver_attr_delay.attr,
4740 &driver_attr_opts.attr,
4741 &driver_attr_ptype.attr,
4742 &driver_attr_dsense.attr,
4743 &driver_attr_fake_rw.attr,
4744 &driver_attr_no_lun_0.attr,
4745 &driver_attr_num_tgts.attr,
4746 &driver_attr_dev_size_mb.attr,
4747 &driver_attr_num_parts.attr,
4748 &driver_attr_every_nth.attr,
4749 &driver_attr_max_luns.attr,
4750 &driver_attr_max_queue.attr,
4751 &driver_attr_no_uld.attr,
4752 &driver_attr_scsi_level.attr,
4753 &driver_attr_virtual_gb.attr,
4754 &driver_attr_add_host.attr,
4755 &driver_attr_vpd_use_hostno.attr,
4756 &driver_attr_sector_size.attr,
4757 &driver_attr_dix.attr,
4758 &driver_attr_dif.attr,
4759 &driver_attr_guard.attr,
4760 &driver_attr_ato.attr,
4761 &driver_attr_map.attr,
4762 &driver_attr_removable.attr,
cbf67842
DG		 4763 &driver_attr_host_lock.attr,
4764 &driver_attr_ndelay.attr,
c2248fc9 4765 &driver_attr_strict.attr,
82069379
AM		 4766 NULL,
4767};
4768ATTRIBUTE_GROUPS(sdebug_drv);
1da177e4 4769
11ddceca 4770static struct device *pseudo_primary;
8dea0d02 4771
1da177e4
LT		 4772static int __init scsi_debug_init(void)
4773{
5f2578e5 4774 unsigned long sz;
1da177e4
LT		 4775 int host_to_add;
4776 int k;
6ecaff7f 4777 int ret;
1da177e4 4778
cbf67842
DG		 4779 atomic_set(&sdebug_cmnd_count, 0);
4780 atomic_set(&sdebug_completions, 0);
4781 atomic_set(&retired_max_queue, 0);
4782
4783 if (scsi_debug_ndelay >= 1000000000) {
c1287970 4784 pr_warn("ndelay must be less than 1 second, ignored\n");
cbf67842
DG		 4785 scsi_debug_ndelay = 0;
4786 } else if (scsi_debug_ndelay > 0)
4787 scsi_debug_delay = DELAY_OVERRIDDEN;
4788
597136ab
MP		 4789 switch (scsi_debug_sector_size) {
4790 case 512:
4791 case 1024:
4792 case 2048:
4793 case 4096:
4794 break;
4795 default:
c1287970 4796 pr_err("invalid sector_size %d\n", scsi_debug_sector_size);
597136ab
MP		 4797 return -EINVAL;
4798 }
4799
c6a44287
MP		 4800 switch (scsi_debug_dif) {
4801
4802 case SD_DIF_TYPE0_PROTECTION:
4803 case SD_DIF_TYPE1_PROTECTION:
395cef03 4804 case SD_DIF_TYPE2_PROTECTION:
c6a44287
MP		 4805 case SD_DIF_TYPE3_PROTECTION:
4806 break;
4807
4808 default:
c1287970 4809 pr_err("dif must be 0, 1, 2 or 3\n");
c6a44287
MP		 4810 return -EINVAL;
4811 }
4812
4813 if (scsi_debug_guard > 1) {
c1287970 4814 pr_err("guard must be 0 or 1\n");
c6a44287
MP		 4815 return -EINVAL;
4816 }
4817
4818 if (scsi_debug_ato > 1) {
c1287970 4819 pr_err("ato must be 0 or 1\n");
c6a44287
MP		 4820 return -EINVAL;
4821 }
4822
ea61fca5 4823 if (scsi_debug_physblk_exp > 15) {
c1287970 4824 pr_err("invalid physblk_exp %u\n", scsi_debug_physblk_exp);
ea61fca5
MP		 4825 return -EINVAL;
4826 }
4827
4828 if (scsi_debug_lowest_aligned > 0x3fff) {
c1287970
TW		 4829 pr_err("lowest_aligned too big: %u\n",
4830 scsi_debug_lowest_aligned);
ea61fca5
MP		 4831 return -EINVAL;
4832 }
4833
1da177e4
LT		 4834 if (scsi_debug_dev_size_mb < 1)
4835 scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
5f2578e5 4836 sz = (unsigned long)scsi_debug_dev_size_mb * 1048576;
597136ab 4837 sdebug_store_sectors = sz / scsi_debug_sector_size;
28898873 4838 sdebug_capacity = get_sdebug_capacity();
1da177e4
LT		 4839
4840 /* play around with geometry, don't waste too much on track 0 */
4841 sdebug_heads = 8;
4842 sdebug_sectors_per = 32;
4843 if (scsi_debug_dev_size_mb >= 16)
4844 sdebug_heads = 32;
4845 else if (scsi_debug_dev_size_mb >= 256)
4846 sdebug_heads = 64;
4847 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
4848 (sdebug_sectors_per * sdebug_heads);
4849 if (sdebug_cylinders_per >= 1024) {
4850 /* other LLDs do this; implies >= 1GB ram disk ... */
4851 sdebug_heads = 255;
4852 sdebug_sectors_per = 63;
4853 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
4854 (sdebug_sectors_per * sdebug_heads);
4855 }
4856
cbf67842
DG		 4857 if (0 == scsi_debug_fake_rw) {
4858 fake_storep = vmalloc(sz);
4859 if (NULL == fake_storep) {
c1287970 4860 pr_err("out of memory, 1\n");
cbf67842
DG		 4861 return -ENOMEM;
4862 }
4863 memset(fake_storep, 0, sz);
4864 if (scsi_debug_num_parts > 0)
4865 sdebug_build_parts(fake_storep, sz);
1da177e4 4866 }
1da177e4 4867
7cb69d03 4868 if (scsi_debug_dix) {
c6a44287
MP		 4869 int dif_size;
4870
4871 dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple);
4872 dif_storep = vmalloc(dif_size);
4873
c1287970 4874 pr_err("dif_storep %u bytes @ %p\n", dif_size, dif_storep);
c6a44287
MP		 4875
4876 if (dif_storep == NULL) {
c1287970 4877 pr_err("out of mem. (DIX)\n");
c6a44287
MP		 4878 ret = -ENOMEM;
4879 goto free_vm;
4880 }
4881
4882 memset(dif_storep, 0xff, dif_size);
4883 }
4884
5b94e232
MP		 4885 /* Logical Block Provisioning */
4886 if (scsi_debug_lbp()) {
6014759c
MP		 4887 scsi_debug_unmap_max_blocks =
4888 clamp(scsi_debug_unmap_max_blocks, 0U, 0xffffffffU);
4889
4890 scsi_debug_unmap_max_desc =
4891 clamp(scsi_debug_unmap_max_desc, 0U, 256U);
4892
4893 scsi_debug_unmap_granularity =
4894 clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU);
4895
4896 if (scsi_debug_unmap_alignment &&
ac17078a
AM		 4897 scsi_debug_unmap_granularity <=
4898 scsi_debug_unmap_alignment) {
c1287970 4899 pr_err("ERR: unmap_granularity <= unmap_alignment\n");
44d92694
MP		 4900 return -EINVAL;
4901 }
4902
b90ebc3d
AM		 4903 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
4904 map_storep = vmalloc(BITS_TO_LONGS(map_size) * sizeof(long));
44d92694 4905
c1287970 4906 pr_info("%lu provisioning blocks\n", map_size);
44d92694
MP		 4907
4908 if (map_storep == NULL) {
c1287970 4909 pr_err("out of mem. (MAP)\n");
44d92694
MP		 4910 ret = -ENOMEM;
4911 goto free_vm;
4912 }
4913
b90ebc3d 4914 bitmap_zero(map_storep, map_size);
44d92694
MP		 4915
4916 /* Map first 1KB for partition table */
4917 if (scsi_debug_num_parts)
4918 map_region(0, 2);
4919 }
4920
9b906779
NB		 4921 pseudo_primary = root_device_register("pseudo_0");
4922 if (IS_ERR(pseudo_primary)) {
c1287970 4923 pr_warn("root_device_register() error\n");
9b906779 4924 ret = PTR_ERR(pseudo_primary);
6ecaff7f
RD		 4925 goto free_vm;
4926 }
4927 ret = bus_register(&pseudo_lld_bus);
4928 if (ret < 0) {
c1287970 4929 pr_warn("bus_register error: %d\n", ret);
6ecaff7f
RD		 4930 goto dev_unreg;
4931 }
4932 ret = driver_register(&sdebug_driverfs_driver);
4933 if (ret < 0) {
c1287970 4934 pr_warn("driver_register error: %d\n", ret);
6ecaff7f
RD		 4935 goto bus_unreg;
4936 }
1da177e4 4937
1da177e4
LT		 4938 host_to_add = scsi_debug_add_host;
4939 scsi_debug_add_host = 0;
4940
4941 for (k = 0; k < host_to_add; k++) {
4942 if (sdebug_add_adapter()) {
c1287970 4943 pr_err("sdebug_add_adapter failed k=%d\n", k);
1da177e4
LT		 4944 break;
4945 }
4946 }
4947
c1287970
TW		 4948 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
4949 pr_info("built %d host(s)\n", scsi_debug_add_host);
4950
1da177e4 4951 return 0;
6ecaff7f 4952
6ecaff7f
RD		 4953bus_unreg:
4954 bus_unregister(&pseudo_lld_bus);
4955dev_unreg:
9b906779 4956 root_device_unregister(pseudo_primary);
6ecaff7f 4957free_vm:
de232af6
TW		 4958 vfree(map_storep);
4959 vfree(dif_storep);
6ecaff7f
RD		 4960 vfree(fake_storep);
4961
4962 return ret;
1da177e4
LT		 4963}
4964
4965static void __exit scsi_debug_exit(void)
4966{
4967 int k = scsi_debug_add_host;
4968
4969 stop_all_queued();
cbf67842 4970 free_all_queued();
1da177e4
LT		 4971 for (; k; k--)
4972 sdebug_remove_adapter();
1da177e4
LT		 4973 driver_unregister(&sdebug_driverfs_driver);
4974 bus_unregister(&pseudo_lld_bus);
9b906779 4975 root_device_unregister(pseudo_primary);
1da177e4 4976
de232af6 4977 vfree(dif_storep);
1da177e4
LT		 4978 vfree(fake_storep);
4979}
4980
4981device_initcall(scsi_debug_init);
4982module_exit(scsi_debug_exit);
4983
1da177e4
LT		 4984static void sdebug_release_adapter(struct device * dev)
4985{
4986 struct sdebug_host_info *sdbg_host;
4987
4988 sdbg_host = to_sdebug_host(dev);
4989 kfree(sdbg_host);
4990}
4991
4992static int sdebug_add_adapter(void)
4993{
4994 int k, devs_per_host;
4995 int error = 0;
4996 struct sdebug_host_info *sdbg_host;
8b40228f 4997 struct sdebug_dev_info *sdbg_devinfo, *tmp;
1da177e4 4998
c65b1445 4999 sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL);
1da177e4 5000 if (NULL == sdbg_host) {
c1287970 5001 pr_err("out of memory at line %d\n", __LINE__);
1da177e4
LT		 5002 return -ENOMEM;
5003 }
5004
1da177e4
LT		 5005 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
5006
5007 devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns;
5008 for (k = 0; k < devs_per_host; k++) {
5cb2fc06
FT		 5009 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
5010 if (!sdbg_devinfo) {
c1287970 5011 pr_err("out of memory at line %d\n", __LINE__);
1da177e4
LT		 5012 error = -ENOMEM;
5013 goto clean;
5014 }
1da177e4
LT		 5015 }
5016
5017 spin_lock(&sdebug_host_list_lock);
5018 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
5019 spin_unlock(&sdebug_host_list_lock);
5020
5021 sdbg_host->dev.bus = &pseudo_lld_bus;
9b906779 5022 sdbg_host->dev.parent = pseudo_primary;
1da177e4 5023 sdbg_host->dev.release = &sdebug_release_adapter;
71610f55 5024 dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host);
1da177e4
LT		 5025
5026 error = device_register(&sdbg_host->dev);
5027
5028 if (error)
5029 goto clean;
5030
5031 ++scsi_debug_add_host;
5032 return error;
5033
5034clean:
8b40228f
FT		 5035 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
5036 dev_list) {
1da177e4
LT		 5037 list_del(&sdbg_devinfo->dev_list);
5038 kfree(sdbg_devinfo);
5039 }
5040
5041 kfree(sdbg_host);
5042 return error;
5043}
5044
5045static void sdebug_remove_adapter(void)
5046{
5047 struct sdebug_host_info * sdbg_host = NULL;
5048
5049 spin_lock(&sdebug_host_list_lock);
5050 if (!list_empty(&sdebug_host_list)) {
5051 sdbg_host = list_entry(sdebug_host_list.prev,
5052 struct sdebug_host_info, host_list);
5053 list_del(&sdbg_host->host_list);
5054 }
5055 spin_unlock(&sdebug_host_list_lock);
5056
5057 if (!sdbg_host)
5058 return;
5059
5060 device_unregister(&sdbg_host->dev);
5061 --scsi_debug_add_host;
5062}
5063
cbf67842 5064static int
db5ed4df 5065sdebug_change_qdepth(struct scsi_device *sdev, int qdepth)
cbf67842
DG		 5066{
5067 int num_in_q = 0;
cbf67842
DG		 5068 unsigned long iflags;
5069 struct sdebug_dev_info *devip;
5070
5071 spin_lock_irqsave(&queued_arr_lock, iflags);
5072 devip = (struct sdebug_dev_info *)sdev->hostdata;
5073 if (NULL == devip) {
5074 spin_unlock_irqrestore(&queued_arr_lock, iflags);
5075 return -ENODEV;
5076 }
5077 num_in_q = atomic_read(&devip->num_in_q);
5078 spin_unlock_irqrestore(&queued_arr_lock, iflags);
c40ecc12
CH		 5079
5080 if (qdepth < 1)
5081 qdepth = 1;
5082 /* allow to exceed max host queued_arr elements for testing */
5083 if (qdepth > SCSI_DEBUG_CANQUEUE + 10)
5084 qdepth = SCSI_DEBUG_CANQUEUE + 10;
db5ed4df 5085 scsi_change_queue_depth(sdev, qdepth);
c40ecc12 5086
cbf67842 5087 if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) {
c40ecc12
CH		 5088 sdev_printk(KERN_INFO, sdev,
5089 "%s: qdepth=%d, num_in_q=%d\n",
5090 __func__, qdepth, num_in_q);
cbf67842
DG		 5091 }
5092 return sdev->queue_depth;
5093}
5094
817fd66b
DG		 5095static int
5096check_inject(struct scsi_cmnd *scp)
5097{
5098 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
5099
5100 memset(ep, 0, sizeof(struct sdebug_scmd_extra_t));
5101
5102 if (atomic_inc_return(&sdebug_cmnd_count) >=
5103 abs(scsi_debug_every_nth)) {
5104 atomic_set(&sdebug_cmnd_count, 0);
5105 if (scsi_debug_every_nth < -1)
5106 scsi_debug_every_nth = -1;
5107 if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts)
5108 return 1; /* ignore command causing timeout */
5109 else if (SCSI_DEBUG_OPT_MAC_TIMEOUT & scsi_debug_opts &&
5110 scsi_medium_access_command(scp))
5111 return 1; /* time out reads and writes */
5112 if (sdebug_any_injecting_opt) {
5113 int opts = scsi_debug_opts;
5114
5115 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
5116 ep->inj_recovered = true;
5117 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
5118 ep->inj_transport = true;
5119 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
5120 ep->inj_dif = true;
5121 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
5122 ep->inj_dix = true;
5123 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
5124 ep->inj_short = true;
5125 }
5126 }
5127 return 0;
5128}
5129
c2248fc9
DG		 5130static int
5131scsi_debug_queuecommand(struct scsi_cmnd *scp)
5132{
5133 u8 sdeb_i;
5134 struct scsi_device *sdp = scp->device;
5135 const struct opcode_info_t *oip;
5136 const struct opcode_info_t *r_oip;
5137 struct sdebug_dev_info *devip;
5138 u8 *cmd = scp->cmnd;
5139 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
5140 int k, na;
5141 int errsts = 0;
5142 int errsts_no_connect = DID_NO_CONNECT << 16;
5143 u32 flags;
5144 u16 sa;
5145 u8 opcode = cmd[0];
5146 bool has_wlun_rl;
5147 bool debug = !!(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts);
5148
5149 scsi_set_resid(scp, 0);
5150 if (debug && !(SCSI_DEBUG_OPT_NO_CDB_NOISE & scsi_debug_opts)) {
5151 char b[120];
5152 int n, len, sb;
5153
5154 len = scp->cmd_len;
5155 sb = (int)sizeof(b);
5156 if (len > 32)
5157 strcpy(b, "too long, over 32 bytes");
5158 else {
5159 for (k = 0, n = 0; k < len && n < sb; ++k)
5160 n += scnprintf(b + n, sb - n, "%02x ",
5161 (u32)cmd[k]);
5162 }
5163 sdev_printk(KERN_INFO, sdp, "%s: cmd %s\n", my_name, b);
5164 }
34d55434 5165 has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS);
c2248fc9
DG		 5166 if ((sdp->lun >= scsi_debug_max_luns) && !has_wlun_rl)
5167 return schedule_resp(scp, NULL, errsts_no_connect, 0);
5168
5169 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */
5170 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */
5171 devip = (struct sdebug_dev_info *)sdp->hostdata;
5172 if (!devip) {
5173 devip = devInfoReg(sdp);
5174 if (NULL == devip)
5175 return schedule_resp(scp, NULL, errsts_no_connect, 0);
5176 }
5177 na = oip->num_attached;
5178 r_pfp = oip->pfp;
5179 if (na) { /* multiple commands with this opcode */
5180 r_oip = oip;
5181 if (FF_SA & r_oip->flags) {
5182 if (F_SA_LOW & oip->flags)
5183 sa = 0x1f & cmd[1];
5184 else
5185 sa = get_unaligned_be16(cmd + 8);
5186 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5187 if (opcode == oip->opcode && sa == oip->sa)
5188 break;
5189 }
5190 } else { /* since no service action only check opcode */
5191 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5192 if (opcode == oip->opcode)
5193 break;
5194 }
5195 }
5196 if (k > na) {
5197 if (F_SA_LOW & r_oip->flags)
5198 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4);
5199 else if (F_SA_HIGH & r_oip->flags)
5200 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7);
5201 else
5202 mk_sense_invalid_opcode(scp);
5203 goto check_cond;
5204 }
5205 } /* else (when na==0) we assume the oip is a match */
5206 flags = oip->flags;
5207 if (F_INV_OP & flags) {
5208 mk_sense_invalid_opcode(scp);
5209 goto check_cond;
5210 }
5211 if (has_wlun_rl && !(F_RL_WLUN_OK & flags)) {
5212 if (debug)
5213 sdev_printk(KERN_INFO, sdp, "scsi_debug: Opcode: "
5214 "0x%x not supported for wlun\n", opcode);
5215 mk_sense_invalid_opcode(scp);
5216 goto check_cond;
5217 }
5218 if (scsi_debug_strict) { /* check cdb against mask */
5219 u8 rem;
5220 int j;
5221
5222 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) {
5223 rem = ~oip->len_mask[k] & cmd[k];
5224 if (rem) {
5225 for (j = 7; j >= 0; --j, rem <<= 1) {
5226 if (0x80 & rem)
5227 break;
5228 }
5229 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j);
5230 goto check_cond;
5231 }
5232 }
5233 }
5234 if (!(F_SKIP_UA & flags) &&
5235 SDEBUG_NUM_UAS != find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS)) {
5236 errsts = check_readiness(scp, UAS_ONLY, devip);
5237 if (errsts)
5238 goto check_cond;
5239 }
5240 if ((F_M_ACCESS & flags) && devip->stopped) {
5241 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2);
5242 if (debug)
5243 sdev_printk(KERN_INFO, sdp, "%s reports: Not ready: "
5244 "%s\n", my_name, "initializing command "
5245 "required");
5246 errsts = check_condition_result;
5247 goto fini;
5248 }
5249 if (scsi_debug_fake_rw && (F_FAKE_RW & flags))
5250 goto fini;
5251 if (scsi_debug_every_nth) {
5252 if (check_inject(scp))
5253 return 0; /* ignore command: make trouble */
5254 }
5255 if (oip->pfp) /* if this command has a resp_* function, call it */
5256 errsts = oip->pfp(scp, devip);
5257 else if (r_pfp) /* if leaf function ptr NULL, try the root's */
5258 errsts = r_pfp(scp, devip);
5259
5260fini:
5261 return schedule_resp(scp, devip, errsts,
5262 ((F_DELAY_OVERR & flags) ? 0 : scsi_debug_delay));
5263check_cond:
5264 return schedule_resp(scp, devip, check_condition_result, 0);
5265}
5266
38d5c833
DG		 5267static int
5268sdebug_queuecommand_lock_or_not(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
5269{
5270 if (scsi_debug_host_lock) {
5271 unsigned long iflags;
5272 int rc;
5273
5274 spin_lock_irqsave(shost->host_lock, iflags);
5275 rc = scsi_debug_queuecommand(cmd);
5276 spin_unlock_irqrestore(shost->host_lock, iflags);
5277 return rc;
5278 } else
5279 return scsi_debug_queuecommand(cmd);
5280}
5281
9e603ca0 5282static struct scsi_host_template sdebug_driver_template = {
c8ed555a
AV		 5283 .show_info = scsi_debug_show_info,
5284 .write_info = scsi_debug_write_info,
9e603ca0
FT		 5285 .proc_name = sdebug_proc_name,
5286 .name = "SCSI DEBUG",
5287 .info = scsi_debug_info,
5288 .slave_alloc = scsi_debug_slave_alloc,
5289 .slave_configure = scsi_debug_slave_configure,
5290 .slave_destroy = scsi_debug_slave_destroy,
5291 .ioctl = scsi_debug_ioctl,
cbf67842
DG		 5292 .queuecommand = sdebug_queuecommand_lock_or_not,
5293 .change_queue_depth = sdebug_change_qdepth,
9e603ca0 5294 .eh_abort_handler = scsi_debug_abort,
9e603ca0 5295 .eh_device_reset_handler = scsi_debug_device_reset,
cbf67842
DG		 5296 .eh_target_reset_handler = scsi_debug_target_reset,
5297 .eh_bus_reset_handler = scsi_debug_bus_reset,
9e603ca0 5298 .eh_host_reset_handler = scsi_debug_host_reset,
9e603ca0
FT		 5299 .can_queue = SCSI_DEBUG_CANQUEUE,
5300 .this_id = 7,
6bb5e6e7 5301 .sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS,
cbf67842 5302 .cmd_per_lun = DEF_CMD_PER_LUN,
6bb5e6e7 5303 .max_sectors = -1U,
9e603ca0
FT		 5304 .use_clustering = DISABLE_CLUSTERING,
5305 .module = THIS_MODULE,
c40ecc12 5306 .track_queue_depth = 1,
817fd66b 5307 .cmd_size = sizeof(struct sdebug_scmd_extra_t),
9e603ca0
FT		 5308};
5309
1da177e4
LT		 5310static int sdebug_driver_probe(struct device * dev)
5311{
22017ed2 5312 int error = 0;
817fd66b 5313 int opts;
22017ed2
DG		 5314 struct sdebug_host_info *sdbg_host;
5315 struct Scsi_Host *hpnt;
c6a44287 5316 int host_prot;
1da177e4
LT		 5317
5318 sdbg_host = to_sdebug_host(dev);
5319
78d4e5a0 5320 sdebug_driver_template.can_queue = scsi_debug_max_queue;
0759c666
AM		 5321 if (scsi_debug_clustering)
5322 sdebug_driver_template.use_clustering = ENABLE_CLUSTERING;
78d4e5a0
DG		 5323 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
5324 if (NULL == hpnt) {
c1287970 5325 pr_err("scsi_host_alloc failed\n");
78d4e5a0 5326 error = -ENODEV;
1da177e4 5327 return error;
78d4e5a0 5328 }
1da177e4
LT		 5329
5330 sdbg_host->shost = hpnt;
5331 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
5332 if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id))
5333 hpnt->max_id = scsi_debug_num_tgts + 1;
5334 else
5335 hpnt->max_id = scsi_debug_num_tgts;
34d55434 5336 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS; /* = scsi_debug_max_luns; */
1da177e4 5337
c6a44287
MP		 5338 host_prot = 0;
5339
5340 switch (scsi_debug_dif) {
5341
5342 case SD_DIF_TYPE1_PROTECTION:
5343 host_prot = SHOST_DIF_TYPE1_PROTECTION;
5344 if (scsi_debug_dix)
5345 host_prot |= SHOST_DIX_TYPE1_PROTECTION;
5346 break;
5347
5348 case SD_DIF_TYPE2_PROTECTION:
5349 host_prot = SHOST_DIF_TYPE2_PROTECTION;
5350 if (scsi_debug_dix)
5351 host_prot |= SHOST_DIX_TYPE2_PROTECTION;
5352 break;
5353
5354 case SD_DIF_TYPE3_PROTECTION:
5355 host_prot = SHOST_DIF_TYPE3_PROTECTION;
5356 if (scsi_debug_dix)
5357 host_prot |= SHOST_DIX_TYPE3_PROTECTION;
5358 break;
5359
5360 default:
5361 if (scsi_debug_dix)
5362 host_prot |= SHOST_DIX_TYPE0_PROTECTION;
5363 break;
5364 }
5365
5366 scsi_host_set_prot(hpnt, host_prot);
5367
c1287970 5368 pr_info("host protection%s%s%s%s%s%s%s\n",
c6a44287
MP		 5369 (host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
5370 (host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
5371 (host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
5372 (host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
5373 (host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
5374 (host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
5375 (host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
5376
5377 if (scsi_debug_guard == 1)
5378 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
5379 else
5380 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
5381
817fd66b
DG		 5382 opts = scsi_debug_opts;
5383 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
5384 sdebug_any_injecting_opt = true;
5385 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
5386 sdebug_any_injecting_opt = true;
5387 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
5388 sdebug_any_injecting_opt = true;
5389 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
5390 sdebug_any_injecting_opt = true;
5391 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
5392 sdebug_any_injecting_opt = true;
5393
1da177e4
LT		 5394 error = scsi_add_host(hpnt, &sdbg_host->dev);
5395 if (error) {
c1287970 5396 pr_err("scsi_add_host failed\n");
1da177e4
LT		 5397 error = -ENODEV;
5398 scsi_host_put(hpnt);
5399 } else
5400 scsi_scan_host(hpnt);
5401
cbf67842 5402 return error;
1da177e4
LT		 5403}
5404
5405static int sdebug_driver_remove(struct device * dev)
5406{
1da177e4 5407 struct sdebug_host_info *sdbg_host;
8b40228f 5408 struct sdebug_dev_info *sdbg_devinfo, *tmp;
1da177e4
LT		 5409
5410 sdbg_host = to_sdebug_host(dev);
5411
5412 if (!sdbg_host) {
c1287970 5413 pr_err("Unable to locate host info\n");
1da177e4
LT		 5414 return -ENODEV;
5415 }
5416
5417 scsi_remove_host(sdbg_host->shost);
5418
8b40228f
FT		 5419 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
5420 dev_list) {
1da177e4
LT		 5421 list_del(&sdbg_devinfo->dev_list);
5422 kfree(sdbg_devinfo);
5423 }
5424
5425 scsi_host_put(sdbg_host->shost);
5426 return 0;
5427}
5428
8dea0d02
FT		 5429static int pseudo_lld_bus_match(struct device *dev,
5430 struct device_driver *dev_driver)
1da177e4 5431{
8dea0d02 5432 return 1;
1da177e4 5433}
8dea0d02
FT		 5434
5435static struct bus_type pseudo_lld_bus = {
5436 .name = "pseudo",
5437 .match = pseudo_lld_bus_match,
5438 .probe = sdebug_driver_probe,
5439 .remove = sdebug_driver_remove,
82069379 5440 .drv_groups = sdebug_drv_groups,
8dea0d02 5441};
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