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lib/scatterlist: mark input buffer parameters as 'const'
[deliverable/linux.git] / drivers / scsi / scsi_debug.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
3 * Copyright (C) 1992 Eric Youngdale
4 * Simulate a host adapter with 2 disks attached. Do a lot of checking
5 * to make sure that we are not getting blocks mixed up, and PANIC if
6 * anything out of the ordinary is seen.
7 * ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
8 *
9 * This version is more generic, simulating a variable number of disk
23183910
DG		 10 * (or disk like devices) sharing a common amount of RAM. To be more
11 * realistic, the simulated devices have the transport attributes of
12 * SAS disks.
1da177e4
LT		 13 *
14 *
78d4e5a0 15 * For documentation see http://sg.danny.cz/sg/sdebug26.html
1da177e4
LT		 16 *
17 * D. Gilbert (dpg) work for Magneto-Optical device test [20010421]
18 * dpg: work for devfs large number of disks [20010809]
19 * forked for lk 2.5 series [20011216, 20020101]
20 * use vmalloc() more inquiry+mode_sense [20020302]
21 * add timers for delayed responses [20020721]
22 * Patrick Mansfield <patmans@us.ibm.com> max_luns+scsi_level [20021031]
23 * Mike Anderson <andmike@us.ibm.com> sysfs work [20021118]
24 * dpg: change style of boot options to "scsi_debug.num_tgts=2" and
25 * module options to "modprobe scsi_debug num_tgts=2" [20021221]
26 */
27
1da177e4
LT		 28#include <linux/module.h>
29
30#include <linux/kernel.h>
1da177e4
LT		 31#include <linux/errno.h>
32#include <linux/timer.h>
5a0e3ad6 33#include <linux/slab.h>
1da177e4
LT		 34#include <linux/types.h>
35#include <linux/string.h>
36#include <linux/genhd.h>
37#include <linux/fs.h>
38#include <linux/init.h>
39#include <linux/proc_fs.h>
1da177e4
LT		 40#include <linux/vmalloc.h>
41#include <linux/moduleparam.h>
852e034d 42#include <linux/scatterlist.h>
1da177e4 43#include <linux/blkdev.h>
c6a44287 44#include <linux/crc-t10dif.h>
cbf67842
DG		 45#include <linux/spinlock.h>
46#include <linux/interrupt.h>
47#include <linux/atomic.h>
48#include <linux/hrtimer.h>
c6a44287
MP		 49
50#include <net/checksum.h>
9ff26eef 51
44d92694
MP		 52#include <asm/unaligned.h>
53
9ff26eef
FT		 54#include <scsi/scsi.h>
55#include <scsi/scsi_cmnd.h>
56#include <scsi/scsi_device.h>
1da177e4
LT		 57#include <scsi/scsi_host.h>
58#include <scsi/scsicam.h>
a34c4e98 59#include <scsi/scsi_eh.h>
cbf67842 60#include <scsi/scsi_tcq.h>
395cef03 61#include <scsi/scsi_dbg.h>
1da177e4 62
c6a44287 63#include "sd.h"
1da177e4 64#include "scsi_logging.h"
1da177e4 65
22017ed2
DG		 66#define SCSI_DEBUG_VERSION "1.85"
67static const char *scsi_debug_version_date = "20141022";
cbf67842
DG		 68
69#define MY_NAME "scsi_debug"
1da177e4 70
6f3cbf55 71/* Additional Sense Code (ASC) */
c65b1445
DG		 72#define NO_ADDITIONAL_SENSE 0x0
73#define LOGICAL_UNIT_NOT_READY 0x4
c2248fc9 74#define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
1da177e4 75#define UNRECOVERED_READ_ERR 0x11
c65b1445 76#define PARAMETER_LIST_LENGTH_ERR 0x1a
1da177e4 77#define INVALID_OPCODE 0x20
22017ed2 78#define LBA_OUT_OF_RANGE 0x21
1da177e4 79#define INVALID_FIELD_IN_CDB 0x24
c65b1445 80#define INVALID_FIELD_IN_PARAM_LIST 0x26
cbf67842
DG		 81#define UA_RESET_ASC 0x29
82#define UA_CHANGED_ASC 0x2a
19c8ead7
EM		 83#define TARGET_CHANGED_ASC 0x3f
84#define LUNS_CHANGED_ASCQ 0x0e
22017ed2
DG		 85#define INSUFF_RES_ASC 0x55
86#define INSUFF_RES_ASCQ 0x3
cbf67842
DG		 87#define POWER_ON_RESET_ASCQ 0x0
88#define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */
89#define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */
22017ed2 90#define CAPACITY_CHANGED_ASCQ 0x9
1da177e4 91#define SAVING_PARAMS_UNSUP 0x39
6f3cbf55 92#define TRANSPORT_PROBLEM 0x4b
c65b1445
DG		 93#define THRESHOLD_EXCEEDED 0x5d
94#define LOW_POWER_COND_ON 0x5e
22017ed2 95#define MISCOMPARE_VERIFY_ASC 0x1d
acafd0b9
EM		 96#define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */
97#define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16
1da177e4 98
6f3cbf55
DG		 99/* Additional Sense Code Qualifier (ASCQ) */
100#define ACK_NAK_TO 0x3
101
1da177e4
LT		 102
103/* Default values for driver parameters */
104#define DEF_NUM_HOST 1
105#define DEF_NUM_TGTS 1
106#define DEF_MAX_LUNS 1
107/* With these defaults, this driver will make 1 host with 1 target
108 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
109 */
5b94e232 110#define DEF_ATO 1
cbf67842 111#define DEF_DELAY 1 /* if > 0 unit is a jiffy */
1da177e4 112#define DEF_DEV_SIZE_MB 8
5b94e232
MP		 113#define DEF_DIF 0
114#define DEF_DIX 0
1da177e4 115#define DEF_D_SENSE 0
5b94e232 116#define DEF_EVERY_NTH 0
23183910 117#define DEF_FAKE_RW 0
c6a44287 118#define DEF_GUARD 0
cbf67842 119#define DEF_HOST_LOCK 0
5b94e232
MP		 120#define DEF_LBPU 0
121#define DEF_LBPWS 0
122#define DEF_LBPWS10 0
be1dd78d 123#define DEF_LBPRZ 1
ea61fca5 124#define DEF_LOWEST_ALIGNED 0
cbf67842 125#define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */
5b94e232
MP		 126#define DEF_NO_LUN_0 0
127#define DEF_NUM_PARTS 0
128#define DEF_OPTS 0
e308b3d1 129#define DEF_OPT_BLKS 64
5b94e232
MP		 130#define DEF_PHYSBLK_EXP 0
131#define DEF_PTYPE 0
d986788b 132#define DEF_REMOVABLE false
e46b0344 133#define DEF_SCSI_LEVEL 6 /* INQUIRY, byte2 [6->SPC-4] */
5b94e232
MP		 134#define DEF_SECTOR_SIZE 512
135#define DEF_UNMAP_ALIGNMENT 0
136#define DEF_UNMAP_GRANULARITY 1
6014759c
MP		 137#define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
138#define DEF_UNMAP_MAX_DESC 256
5b94e232
MP		 139#define DEF_VIRTUAL_GB 0
140#define DEF_VPD_USE_HOSTNO 1
141#define DEF_WRITESAME_LENGTH 0xFFFF
c2248fc9 142#define DEF_STRICT 0
cbf67842 143#define DELAY_OVERRIDDEN -9999
1da177e4
LT		 144
145/* bit mask values for scsi_debug_opts */
146#define SCSI_DEBUG_OPT_NOISE 1
147#define SCSI_DEBUG_OPT_MEDIUM_ERR 2
148#define SCSI_DEBUG_OPT_TIMEOUT 4
149#define SCSI_DEBUG_OPT_RECOVERED_ERR 8
6f3cbf55 150#define SCSI_DEBUG_OPT_TRANSPORT_ERR 16
c6a44287
MP		 151#define SCSI_DEBUG_OPT_DIF_ERR 32
152#define SCSI_DEBUG_OPT_DIX_ERR 64
18a4d0a2 153#define SCSI_DEBUG_OPT_MAC_TIMEOUT 128
cbf67842
DG		 154#define SCSI_DEBUG_OPT_SHORT_TRANSFER 0x100
155#define SCSI_DEBUG_OPT_Q_NOISE 0x200
156#define SCSI_DEBUG_OPT_ALL_TSF 0x400
157#define SCSI_DEBUG_OPT_RARE_TSF 0x800
158#define SCSI_DEBUG_OPT_N_WCE 0x1000
159#define SCSI_DEBUG_OPT_RESET_NOISE 0x2000
160#define SCSI_DEBUG_OPT_NO_CDB_NOISE 0x4000
161#define SCSI_DEBUG_OPT_ALL_NOISE (0x1 | 0x200 | 0x2000)
1da177e4
LT		 162/* When "every_nth" > 0 then modulo "every_nth" commands:
163 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
164 * - a RECOVERED_ERROR is simulated on successful read and write
165 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
6f3cbf55
DG		 166 * - a TRANSPORT_ERROR is simulated on successful read and write
167 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
1da177e4
LT		 168 *
169 * When "every_nth" < 0 then after "- every_nth" commands:
170 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
171 * - a RECOVERED_ERROR is simulated on successful read and write
172 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
6f3cbf55
DG		 173 * - a TRANSPORT_ERROR is simulated on successful read and write
174 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
1da177e4
LT		 175 * This will continue until some other action occurs (e.g. the user
176 * writing a new value (other than -1 or 1) to every_nth via sysfs).
177 */
178
cbf67842
DG		 179/* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs)are returned in
180 * priority order. In the subset implemented here lower numbers have higher
181 * priority. The UA numbers should be a sequence starting from 0 with
182 * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */
183#define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */
184#define SDEBUG_UA_BUS_RESET 1
185#define SDEBUG_UA_MODE_CHANGED 2
0d01c5df 186#define SDEBUG_UA_CAPACITY_CHANGED 3
19c8ead7 187#define SDEBUG_UA_LUNS_CHANGED 4
acafd0b9
EM		 188#define SDEBUG_UA_MICROCODE_CHANGED 5 /* simulate firmware change */
189#define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 6
190#define SDEBUG_NUM_UAS 7
cbf67842
DG		 191
192/* for check_readiness() */
c2248fc9
DG		 193#define UAS_ONLY 1 /* check for UAs only */
194#define UAS_TUR 0 /* if no UAs then check if media access possible */
cbf67842 195
1da177e4
LT		 196/* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
197 * sector on read commands: */
198#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
32f7ef73 199#define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
1da177e4
LT		 200
201/* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
202 * or "peripheral device" addressing (value 0) */
203#define SAM2_LUN_ADDRESS_METHOD 0
c65b1445 204#define SAM2_WLUN_REPORT_LUNS 0xc101
1da177e4 205
cbf67842
DG		 206/* SCSI_DEBUG_CANQUEUE is the maximum number of commands that can be queued
207 * (for response) at one time. Can be reduced by max_queue option. Command
208 * responses are not queued when delay=0 and ndelay=0. The per-device
209 * DEF_CMD_PER_LUN can be changed via sysfs:
210 * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth but cannot exceed
211 * SCSI_DEBUG_CANQUEUE. */
212#define SCSI_DEBUG_CANQUEUE_WORDS 9 /* a WORD is bits in a long */
213#define SCSI_DEBUG_CANQUEUE (SCSI_DEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
214#define DEF_CMD_PER_LUN 255
215
216#if DEF_CMD_PER_LUN > SCSI_DEBUG_CANQUEUE
217#warning "Expect DEF_CMD_PER_LUN <= SCSI_DEBUG_CANQUEUE"
218#endif
78d4e5a0 219
c2248fc9
DG		 220/* SCSI opcodes (first byte of cdb) mapped onto these indexes */
221enum sdeb_opcode_index {
222 SDEB_I_INVALID_OPCODE = 0,
223 SDEB_I_INQUIRY = 1,
224 SDEB_I_REPORT_LUNS = 2,
225 SDEB_I_REQUEST_SENSE = 3,
226 SDEB_I_TEST_UNIT_READY = 4,
227 SDEB_I_MODE_SENSE = 5, /* 6, 10 */
228 SDEB_I_MODE_SELECT = 6, /* 6, 10 */
229 SDEB_I_LOG_SENSE = 7,
230 SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */
231 SDEB_I_READ = 9, /* 6, 10, 12, 16 */
232 SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */
233 SDEB_I_START_STOP = 11,
234 SDEB_I_SERV_ACT_IN = 12, /* 12, 16 */
235 SDEB_I_SERV_ACT_OUT = 13, /* 12, 16 */
236 SDEB_I_MAINT_IN = 14,
237 SDEB_I_MAINT_OUT = 15,
238 SDEB_I_VERIFY = 16, /* 10 only */
239 SDEB_I_VARIABLE_LEN = 17,
240 SDEB_I_RESERVE = 18, /* 6, 10 */
241 SDEB_I_RELEASE = 19, /* 6, 10 */
242 SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
243 SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */
244 SDEB_I_ATA_PT = 22, /* 12, 16 */
245 SDEB_I_SEND_DIAG = 23,
246 SDEB_I_UNMAP = 24,
247 SDEB_I_XDWRITEREAD = 25, /* 10 only */
248 SDEB_I_WRITE_BUFFER = 26,
249 SDEB_I_WRITE_SAME = 27, /* 10, 16 */
250 SDEB_I_SYNC_CACHE = 28, /* 10 only */
251 SDEB_I_COMP_WRITE = 29,
252 SDEB_I_LAST_ELEMENT = 30, /* keep this last */
253};
254
255static const unsigned char opcode_ind_arr[256] = {
256/* 0x0; 0x0->0x1f: 6 byte cdbs */
257 SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE,
258 0, 0, 0, 0,
259 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0,
260 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
261 SDEB_I_RELEASE,
262 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG,
263 SDEB_I_ALLOW_REMOVAL, 0,
264/* 0x20; 0x20->0x3f: 10 byte cdbs */
265 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0,
266 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY,
267 0, 0, 0, 0, 0, SDEB_I_SYNC_CACHE, 0, 0,
268 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0,
269/* 0x40; 0x40->0x5f: 10 byte cdbs */
270 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0,
271 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0,
272 0, 0, 0, SDEB_I_XDWRITEREAD, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
273 SDEB_I_RELEASE,
274 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0,
275/* 0x60; 0x60->0x7d are reserved */
276 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
277 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
278 0, SDEB_I_VARIABLE_LEN,
279/* 0x80; 0x80->0x9f: 16 byte cdbs */
280 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0,
281 SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0, 0, 0, 0, 0,
282 0, 0, 0, SDEB_I_WRITE_SAME, 0, 0, 0, 0,
283 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN, SDEB_I_SERV_ACT_OUT,
284/* 0xa0; 0xa0->0xbf: 12 byte cdbs */
285 SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN,
286 SDEB_I_MAINT_OUT, 0, 0, 0,
287 SDEB_I_READ, SDEB_I_SERV_ACT_OUT, SDEB_I_WRITE, SDEB_I_SERV_ACT_IN,
288 0, 0, 0, 0,
289 0, 0, 0, 0, 0, 0, 0, 0,
290 0, 0, 0, 0, 0, 0, 0, 0,
291/* 0xc0; 0xc0->0xff: vendor specific */
292 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
293 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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};
297
298#define F_D_IN 1
299#define F_D_OUT 2
300#define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */
301#define F_D_UNKN 8
302#define F_RL_WLUN_OK 0x10
303#define F_SKIP_UA 0x20
304#define F_DELAY_OVERR 0x40
305#define F_SA_LOW 0x80 /* cdb byte 1, bits 4 to 0 */
306#define F_SA_HIGH 0x100 /* as used by variable length cdbs */
307#define F_INV_OP 0x200
308#define F_FAKE_RW 0x400
309#define F_M_ACCESS 0x800 /* media access */
310
311#define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR)
312#define FF_DIRECT_IO (F_M_ACCESS | F_FAKE_RW)
313#define FF_SA (F_SA_HIGH | F_SA_LOW)
314
315struct sdebug_dev_info;
c2248fc9
DG		 316static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *);
317static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *);
318static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *);
319static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
320static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *);
321static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
322static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
323static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
324static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
325static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
326static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
327static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
328static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *);
329static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *);
38d5c833
DG		 330static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *);
331static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *);
c2248fc9
DG		 332static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *);
333static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *);
334static int resp_xdwriteread_10(struct scsi_cmnd *, struct sdebug_dev_info *);
38d5c833 335static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
acafd0b9 336static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *);
c2248fc9
DG		 337
338struct opcode_info_t {
339 u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff
340 * for terminating element */
341 u8 opcode; /* if num_attached > 0, preferred */
342 u16 sa; /* service action */
343 u32 flags; /* OR-ed set of SDEB_F_* */
344 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
345 const struct opcode_info_t *arrp; /* num_attached elements or NULL */
346 u8 len_mask[16]; /* len=len_mask[0], then mask for cdb[1]... */
347 /* ignore cdb bytes after position 15 */
348};
349
350static const struct opcode_info_t msense_iarr[1] = {
351 {0, 0x1a, 0, F_D_IN, NULL, NULL,
352 {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
353};
354
355static const struct opcode_info_t mselect_iarr[1] = {
356 {0, 0x15, 0, F_D_OUT, NULL, NULL,
357 {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
358};
359
360static const struct opcode_info_t read_iarr[3] = {
361 {0, 0x28, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL,/* READ(10) */
362 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
363 0, 0, 0, 0} },
364 {0, 0x8, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL, /* READ(6) */
365 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
366 {0, 0xa8, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL,/* READ(12) */
367 {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x9f,
368 0xc7, 0, 0, 0, 0} },
369};
370
371static const struct opcode_info_t write_iarr[3] = {
372 {0, 0x2a, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 10 */
373 {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
374 0, 0, 0, 0} },
375 {0, 0xa, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 6 */
376 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
377 {0, 0xaa, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 12 */
378 {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x9f,
379 0xc7, 0, 0, 0, 0} },
380};
381
382static const struct opcode_info_t sa_in_iarr[1] = {
383 {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL,
384 {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
385 0xff, 0xff, 0xff, 0, 0xc7} },
386};
387
388static const struct opcode_info_t vl_iarr[1] = { /* VARIABLE LENGTH */
389 {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_DIRECT_IO, resp_write_dt0,
390 NULL, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0xb, 0xfa,
391 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
392};
393
394static const struct opcode_info_t maint_in_iarr[2] = {
38d5c833 395 {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL,
c2248fc9
DG		 396 {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
397 0xc7, 0, 0, 0, 0} },
38d5c833 398 {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL,
c2248fc9
DG		 399 {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
400 0, 0} },
401};
402
403static const struct opcode_info_t write_same_iarr[1] = {
404 {0, 0x93, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, resp_write_same_16, NULL,
405 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
406 0xff, 0xff, 0xff, 0x1f, 0xc7} },
407};
408
409static const struct opcode_info_t reserve_iarr[1] = {
410 {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */
411 {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
412};
413
414static const struct opcode_info_t release_iarr[1] = {
415 {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */
416 {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
417};
418
419
420/* This array is accessed via SDEB_I_* values. Make sure all are mapped,
421 * plus the terminating elements for logic that scans this table such as
422 * REPORT SUPPORTED OPERATION CODES. */
423static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEMENT + 1] = {
424/* 0 */
425 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL,
426 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
427 {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL,
428 {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
429 {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL,
430 {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
431 0, 0} },
432 {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL,
433 {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
434 {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */
435 {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
436 {1, 0x5a, 0, F_D_IN, resp_mode_sense, msense_iarr,
437 {10, 0xf8, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
438 0} },
439 {1, 0x55, 0, F_D_OUT, resp_mode_select, mselect_iarr,
440 {10, 0xf1, 0, 0, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
441 {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL,
442 {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0,
443 0, 0, 0} },
444 {0, 0x25, 0, F_D_IN, resp_readcap, NULL,
445 {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0,
446 0, 0} },
447 {3, 0x88, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, read_iarr,
448 {16, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
449 0xff, 0xff, 0xff, 0x9f, 0xc7} }, /* READ(16) */
450/* 10 */
451 {3, 0x8a, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, write_iarr,
452 {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
453 0xff, 0xff, 0xff, 0x9f, 0xc7} }, /* WRITE(16) */
454 {0, 0x1b, 0, 0, resp_start_stop, NULL, /* START STOP UNIT */
455 {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
456 {1, 0x9e, 0x10, F_SA_LOW | F_D_IN, resp_readcap16, sa_in_iarr,
457 {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
458 0xff, 0xff, 0xff, 0x1, 0xc7} }, /* READ CAPACITY(16) */
459 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* SA OUT */
460 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
461 {2, 0xa3, 0xa, F_SA_LOW | F_D_IN, resp_report_tgtpgs, maint_in_iarr,
462 {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, 0,
463 0} },
464 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */
465 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
466 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* VERIFY */
467 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
468 {1, 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_DIRECT_IO, resp_read_dt0,
469 vl_iarr, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0x9, 0xfe, 0,
470 0xff, 0xff, 0xff, 0xff} },/* VARIABLE LENGTH, READ(32) */
471 {1, 0x56, 0, F_D_OUT, NULL, reserve_iarr, /* RESERVE(10) */
472 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
473 0} },
474 {1, 0x57, 0, F_D_OUT, NULL, release_iarr, /* RELEASE(10) */
475 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
476 0} },
477/* 20 */
478 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ALLOW REMOVAL */
479 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
480 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */
481 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
482 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */
483 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
484 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */
485 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
486 {0, 0x42, 0, F_D_OUT | FF_DIRECT_IO, resp_unmap, NULL, /* UNMAP */
487 {10, 0x1, 0, 0, 0, 0, 0x1f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
488 {0, 0x53, 0, F_D_IN | F_D_OUT | FF_DIRECT_IO, resp_xdwriteread_10,
489 NULL, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7,
490 0, 0, 0, 0, 0, 0} },
acafd0b9
EM		 491 {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL,
492 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0,
493 0, 0, 0, 0} }, /* WRITE_BUFFER */
c2248fc9
DG		 494 {1, 0x41, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, resp_write_same_10,
495 write_same_iarr, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff,
496 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
497 {0, 0x35, 0, F_DELAY_OVERR | FF_DIRECT_IO, NULL, NULL, /* SYNC_CACHE */
498 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
499 0, 0, 0, 0} },
38d5c833 500 {0, 0x89, 0, F_D_OUT | FF_DIRECT_IO, resp_comp_write, NULL,
c2248fc9
DG		 501 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
502 0, 0xff, 0x1f, 0xc7} }, /* COMPARE AND WRITE */
503
504/* 30 */
505 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */
506 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
507};
508
817fd66b
DG		 509struct sdebug_scmd_extra_t {
510 bool inj_recovered;
511 bool inj_transport;
512 bool inj_dif;
513 bool inj_dix;
514 bool inj_short;
515};
516
1da177e4 517static int scsi_debug_add_host = DEF_NUM_HOST;
5b94e232 518static int scsi_debug_ato = DEF_ATO;
1da177e4
LT		 519static int scsi_debug_delay = DEF_DELAY;
520static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB;
5b94e232
MP		 521static int scsi_debug_dif = DEF_DIF;
522static int scsi_debug_dix = DEF_DIX;
523static int scsi_debug_dsense = DEF_D_SENSE;
1da177e4 524static int scsi_debug_every_nth = DEF_EVERY_NTH;
5b94e232 525static int scsi_debug_fake_rw = DEF_FAKE_RW;
68aee7ba 526static unsigned int scsi_debug_guard = DEF_GUARD;
5b94e232 527static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED;
1da177e4 528static int scsi_debug_max_luns = DEF_MAX_LUNS;
78d4e5a0 529static int scsi_debug_max_queue = SCSI_DEBUG_CANQUEUE;
cbf67842
DG		 530static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */
531static int scsi_debug_ndelay = DEF_NDELAY;
5b94e232 532static int scsi_debug_no_lun_0 = DEF_NO_LUN_0;
78d4e5a0 533static int scsi_debug_no_uld = 0;
5b94e232 534static int scsi_debug_num_parts = DEF_NUM_PARTS;
1da177e4 535static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */
5b94e232 536static int scsi_debug_opt_blks = DEF_OPT_BLKS;
1da177e4 537static int scsi_debug_opts = DEF_OPTS;
5b94e232 538static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP;
1da177e4 539static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */
5b94e232
MP		 540static int scsi_debug_scsi_level = DEF_SCSI_LEVEL;
541static int scsi_debug_sector_size = DEF_SECTOR_SIZE;
c65b1445 542static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB;
23183910 543static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
5b94e232
MP		 544static unsigned int scsi_debug_lbpu = DEF_LBPU;
545static unsigned int scsi_debug_lbpws = DEF_LBPWS;
546static unsigned int scsi_debug_lbpws10 = DEF_LBPWS10;
be1dd78d 547static unsigned int scsi_debug_lbprz = DEF_LBPRZ;
6014759c 548static unsigned int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
5b94e232
MP		 549static unsigned int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY;
550static unsigned int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
551static unsigned int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
552static unsigned int scsi_debug_write_same_length = DEF_WRITESAME_LENGTH;
d986788b 553static bool scsi_debug_removable = DEF_REMOVABLE;
0759c666 554static bool scsi_debug_clustering;
cbf67842 555static bool scsi_debug_host_lock = DEF_HOST_LOCK;
c2248fc9 556static bool scsi_debug_strict = DEF_STRICT;
817fd66b 557static bool sdebug_any_injecting_opt;
1da177e4 558
cbf67842
DG		 559static atomic_t sdebug_cmnd_count;
560static atomic_t sdebug_completions;
561static atomic_t sdebug_a_tsf; /* counter of 'almost' TSFs */
1da177e4
LT		 562
563#define DEV_READONLY(TGT) (0)
1da177e4 564
c65b1445 565static unsigned int sdebug_store_sectors;
1da177e4
LT		 566static sector_t sdebug_capacity; /* in sectors */
567
568/* old BIOS stuff, kernel may get rid of them but some mode sense pages
569 may still need them */
570static int sdebug_heads; /* heads per disk */
571static int sdebug_cylinders_per; /* cylinders per surface */
572static int sdebug_sectors_per; /* sectors per cylinder */
573
1da177e4
LT		 574#define SDEBUG_MAX_PARTS 4
575
395cef03 576#define SCSI_DEBUG_MAX_CMD_LEN 32
9e603ca0 577
5b94e232
MP		 578static unsigned int scsi_debug_lbp(void)
579{
cbf67842
DG		 580 return ((0 == scsi_debug_fake_rw) &&
581 (scsi_debug_lbpu | scsi_debug_lbpws | scsi_debug_lbpws10));
5b94e232
MP		 582}
583
1da177e4
LT		 584struct sdebug_dev_info {
585 struct list_head dev_list;
1da177e4
LT		 586 unsigned int channel;
587 unsigned int target;
9cb78c16 588 u64 lun;
1da177e4 589 struct sdebug_host_info *sdbg_host;
cbf67842
DG		 590 unsigned long uas_bm[1];
591 atomic_t num_in_q;
c2248fc9
DG		 592 char stopped; /* TODO: should be atomic */
593 bool used;
1da177e4
LT		 594};
595
596struct sdebug_host_info {
597 struct list_head host_list;
598 struct Scsi_Host *shost;
599 struct device dev;
600 struct list_head dev_info_list;
601};
602
603#define to_sdebug_host(d) \
604 container_of(d, struct sdebug_host_info, dev)
605
606static LIST_HEAD(sdebug_host_list);
607static DEFINE_SPINLOCK(sdebug_host_list_lock);
608
cbf67842
DG		 609
610struct sdebug_hrtimer { /* ... is derived from hrtimer */
611 struct hrtimer hrt; /* must be first element */
612 int qa_indx;
613};
1da177e4
LT		 614
615struct sdebug_queued_cmd {
cbf67842
DG		 616 /* in_use flagged by a bit in queued_in_use_bm[] */
617 struct timer_list *cmnd_timerp;
618 struct tasklet_struct *tletp;
619 struct sdebug_hrtimer *sd_hrtp;
1da177e4 620 struct scsi_cmnd * a_cmnd;
1da177e4
LT		 621};
622static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
cbf67842
DG		 623static unsigned long queued_in_use_bm[SCSI_DEBUG_CANQUEUE_WORDS];
624
1da177e4 625
1da177e4 626static unsigned char * fake_storep; /* ramdisk storage */
e18d8bea 627static struct sd_dif_tuple *dif_storep; /* protection info */
44d92694 628static void *map_storep; /* provisioning map */
1da177e4 629
44d92694 630static unsigned long map_size;
cbf67842
DG		 631static int num_aborts;
632static int num_dev_resets;
633static int num_target_resets;
634static int num_bus_resets;
635static int num_host_resets;
c6a44287
MP		 636static int dix_writes;
637static int dix_reads;
638static int dif_errors;
1da177e4
LT		 639
640static DEFINE_SPINLOCK(queued_arr_lock);
641static DEFINE_RWLOCK(atomic_rw);
642
cbf67842
DG		 643static char sdebug_proc_name[] = MY_NAME;
644static const char *my_name = MY_NAME;
1da177e4 645
1da177e4
LT		 646static struct bus_type pseudo_lld_bus;
647
648static struct device_driver sdebug_driverfs_driver = {
649 .name = sdebug_proc_name,
650 .bus = &pseudo_lld_bus,
1da177e4
LT		 651};
652
653static const int check_condition_result =
654 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
655
c6a44287
MP		 656static const int illegal_condition_result =
657 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
658
cbf67842
DG		 659static const int device_qfull_result =
660 (DID_OK << 16) | (COMMAND_COMPLETE << 8) | SAM_STAT_TASK_SET_FULL;
661
662static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
663 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
664 0, 0, 0, 0};
c65b1445
DG		 665static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
666 0, 0, 0x2, 0x4b};
667static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
668 0, 0, 0x0, 0x0};
669
14faa944
AM		 670static void *fake_store(unsigned long long lba)
671{
672 lba = do_div(lba, sdebug_store_sectors);
673
674 return fake_storep + lba * scsi_debug_sector_size;
675}
676
677static struct sd_dif_tuple *dif_store(sector_t sector)
678{
679 sector = do_div(sector, sdebug_store_sectors);
680
681 return dif_storep + sector;
682}
683
1da177e4
LT		 684static int sdebug_add_adapter(void);
685static void sdebug_remove_adapter(void);
1da177e4 686
8dea0d02
FT		 687static void sdebug_max_tgts_luns(void)
688{
689 struct sdebug_host_info *sdbg_host;
690 struct Scsi_Host *hpnt;
691
692 spin_lock(&sdebug_host_list_lock);
693 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
694 hpnt = sdbg_host->shost;
695 if ((hpnt->this_id >= 0) &&
696 (scsi_debug_num_tgts > hpnt->this_id))
697 hpnt->max_id = scsi_debug_num_tgts + 1;
698 else
699 hpnt->max_id = scsi_debug_num_tgts;
700 /* scsi_debug_max_luns; */
701 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS;
702 }
703 spin_unlock(&sdebug_host_list_lock);
704}
705
22017ed2
DG		 706enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
707
708/* Set in_bit to -1 to indicate no bit position of invalid field */
709static void
710mk_sense_invalid_fld(struct scsi_cmnd *scp, enum sdeb_cmd_data c_d,
711 int in_byte, int in_bit)
712{
713 unsigned char *sbuff;
714 u8 sks[4];
715 int sl, asc;
716
717 sbuff = scp->sense_buffer;
718 if (!sbuff) {
719 sdev_printk(KERN_ERR, scp->device,
720 "%s: sense_buffer is NULL\n", __func__);
721 return;
722 }
723 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
724 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
725 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, ILLEGAL_REQUEST,
726 asc, 0);
727 memset(sks, 0, sizeof(sks));
728 sks[0] = 0x80;
729 if (c_d)
730 sks[0] |= 0x40;
731 if (in_bit >= 0) {
732 sks[0] |= 0x8;
733 sks[0] |= 0x7 & in_bit;
734 }
735 put_unaligned_be16(in_byte, sks + 1);
736 if (scsi_debug_dsense) {
737 sl = sbuff[7] + 8;
738 sbuff[7] = sl;
739 sbuff[sl] = 0x2;
740 sbuff[sl + 1] = 0x6;
741 memcpy(sbuff + sl + 4, sks, 3);
742 } else
743 memcpy(sbuff + 15, sks, 3);
744 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
745 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
746 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
747 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
748}
749
cbf67842 750static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
8dea0d02
FT		 751{
752 unsigned char *sbuff;
753
cbf67842
DG		 754 sbuff = scp->sense_buffer;
755 if (!sbuff) {
756 sdev_printk(KERN_ERR, scp->device,
757 "%s: sense_buffer is NULL\n", __func__);
758 return;
759 }
760 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
8dea0d02
FT		 761
762 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, key, asc, asq);
763
764 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
cbf67842
DG		 765 sdev_printk(KERN_INFO, scp->device,
766 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
767 my_name, key, asc, asq);
8dea0d02 768}
1da177e4 769
22017ed2
DG		 770static void
771mk_sense_invalid_opcode(struct scsi_cmnd *scp)
772{
773 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
774}
775
1da177e4
LT		 776static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
777{
778 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
cbf67842
DG		 779 if (0x1261 == cmd)
780 sdev_printk(KERN_INFO, dev,
781 "%s: BLKFLSBUF [0x1261]\n", __func__);
782 else if (0x5331 == cmd)
783 sdev_printk(KERN_INFO, dev,
784 "%s: CDROM_GET_CAPABILITY [0x5331]\n",
785 __func__);
786 else
787 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
788 __func__, cmd);
1da177e4
LT		 789 }
790 return -EINVAL;
791 /* return -ENOTTY; // correct return but upsets fdisk */
792}
793
19c8ead7
EM		 794static void clear_luns_changed_on_target(struct sdebug_dev_info *devip)
795{
796 struct sdebug_host_info *sdhp;
797 struct sdebug_dev_info *dp;
798
799 spin_lock(&sdebug_host_list_lock);
800 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
801 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
802 if ((devip->sdbg_host == dp->sdbg_host) &&
803 (devip->target == dp->target))
804 clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
805 }
806 }
807 spin_unlock(&sdebug_host_list_lock);
808}
809
cbf67842 810static int check_readiness(struct scsi_cmnd *SCpnt, int uas_only,
c65b1445 811 struct sdebug_dev_info * devip)
1da177e4 812{
cbf67842
DG		 813 int k;
814 bool debug = !!(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts);
815
816 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
817 if (k != SDEBUG_NUM_UAS) {
818 const char *cp = NULL;
819
820 switch (k) {
821 case SDEBUG_UA_POR:
822 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
823 UA_RESET_ASC, POWER_ON_RESET_ASCQ);
824 if (debug)
825 cp = "power on reset";
826 break;
827 case SDEBUG_UA_BUS_RESET:
828 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
829 UA_RESET_ASC, BUS_RESET_ASCQ);
830 if (debug)
831 cp = "bus reset";
832 break;
833 case SDEBUG_UA_MODE_CHANGED:
834 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
835 UA_CHANGED_ASC, MODE_CHANGED_ASCQ);
836 if (debug)
837 cp = "mode parameters changed";
838 break;
0d01c5df
DG		 839 case SDEBUG_UA_CAPACITY_CHANGED:
840 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
841 UA_CHANGED_ASC, CAPACITY_CHANGED_ASCQ);
842 if (debug)
843 cp = "capacity data changed";
f49accf1 844 break;
acafd0b9
EM		 845 case SDEBUG_UA_MICROCODE_CHANGED:
846 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
847 TARGET_CHANGED_ASC, MICROCODE_CHANGED_ASCQ);
848 if (debug)
849 cp = "microcode has been changed";
850 break;
851 case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET:
852 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
853 TARGET_CHANGED_ASC,
854 MICROCODE_CHANGED_WO_RESET_ASCQ);
855 if (debug)
856 cp = "microcode has been changed without reset";
857 break;
19c8ead7
EM		 858 case SDEBUG_UA_LUNS_CHANGED:
859 /*
860 * SPC-3 behavior is to report a UNIT ATTENTION with
861 * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN
862 * on the target, until a REPORT LUNS command is
863 * received. SPC-4 behavior is to report it only once.
864 * NOTE: scsi_debug_scsi_level does not use the same
865 * values as struct scsi_device->scsi_level.
866 */
867 if (scsi_debug_scsi_level >= 6) /* SPC-4 and above */
868 clear_luns_changed_on_target(devip);
869 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
870 TARGET_CHANGED_ASC,
871 LUNS_CHANGED_ASCQ);
872 if (debug)
873 cp = "reported luns data has changed";
874 break;
cbf67842
DG		 875 default:
876 pr_warn("%s: unexpected unit attention code=%d\n",
877 __func__, k);
878 if (debug)
879 cp = "unknown";
880 break;
881 }
882 clear_bit(k, devip->uas_bm);
883 if (debug)
884 sdev_printk(KERN_INFO, SCpnt->device,
885 "%s reports: Unit attention: %s\n",
886 my_name, cp);
1da177e4
LT		 887 return check_condition_result;
888 }
cbf67842
DG		 889 if ((UAS_TUR == uas_only) && devip->stopped) {
890 mk_sense_buffer(SCpnt, NOT_READY, LOGICAL_UNIT_NOT_READY,
c65b1445 891 0x2);
cbf67842
DG		 892 if (debug)
893 sdev_printk(KERN_INFO, SCpnt->device,
894 "%s reports: Not ready: %s\n", my_name,
895 "initializing command required");
c65b1445
DG		 896 return check_condition_result;
897 }
1da177e4
LT		 898 return 0;
899}
900
901/* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */
21a61829 902static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1da177e4
LT		 903 int arr_len)
904{
21a61829 905 int act_len;
072d0bb3 906 struct scsi_data_buffer *sdb = scsi_in(scp);
1da177e4 907
072d0bb3 908 if (!sdb->length)
1da177e4 909 return 0;
072d0bb3 910 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
1da177e4 911 return (DID_ERROR << 16);
21a61829
FT		 912
913 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
914 arr, arr_len);
a4517511 915 sdb->resid = scsi_bufflen(scp) - act_len;
21a61829 916
1da177e4
LT		 917 return 0;
918}
919
920/* Returns number of bytes fetched into 'arr' or -1 if error. */
21a61829
FT		 921static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
922 int arr_len)
1da177e4 923{
21a61829 924 if (!scsi_bufflen(scp))
1da177e4 925 return 0;
072d0bb3 926 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE))
1da177e4 927 return -1;
21a61829
FT		 928
929 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
1da177e4
LT		 930}
931
932
933static const char * inq_vendor_id = "Linux ";
934static const char * inq_product_id = "scsi_debug ";
cbf67842 935static const char *inq_product_rev = "0184"; /* version less '.' */
1da177e4 936
cbf67842 937/* Device identification VPD page. Returns number of bytes placed in arr */
5a09e398
HR		 938static int inquiry_evpd_83(unsigned char * arr, int port_group_id,
939 int target_dev_id, int dev_id_num,
940 const char * dev_id_str,
c65b1445 941 int dev_id_str_len)
1da177e4 942{
c65b1445
DG		 943 int num, port_a;
944 char b[32];
1da177e4 945
c65b1445 946 port_a = target_dev_id + 1;
1da177e4
LT		 947 /* T10 vendor identifier field format (faked) */
948 arr[0] = 0x2; /* ASCII */
949 arr[1] = 0x1;
950 arr[2] = 0x0;
951 memcpy(&arr[4], inq_vendor_id, 8);
952 memcpy(&arr[12], inq_product_id, 16);
953 memcpy(&arr[28], dev_id_str, dev_id_str_len);
954 num = 8 + 16 + dev_id_str_len;
955 arr[3] = num;
956 num += 4;
c65b1445
DG		 957 if (dev_id_num >= 0) {
958 /* NAA-5, Logical unit identifier (binary) */
959 arr[num++] = 0x1; /* binary (not necessarily sas) */
960 arr[num++] = 0x3; /* PIV=0, lu, naa */
961 arr[num++] = 0x0;
962 arr[num++] = 0x8;
963 arr[num++] = 0x53; /* naa-5 ieee company id=0x333333 (fake) */
964 arr[num++] = 0x33;
965 arr[num++] = 0x33;
966 arr[num++] = 0x30;
967 arr[num++] = (dev_id_num >> 24);
968 arr[num++] = (dev_id_num >> 16) & 0xff;
969 arr[num++] = (dev_id_num >> 8) & 0xff;
970 arr[num++] = dev_id_num & 0xff;
971 /* Target relative port number */
972 arr[num++] = 0x61; /* proto=sas, binary */
973 arr[num++] = 0x94; /* PIV=1, target port, rel port */
974 arr[num++] = 0x0; /* reserved */
975 arr[num++] = 0x4; /* length */
976 arr[num++] = 0x0; /* reserved */
977 arr[num++] = 0x0; /* reserved */
978 arr[num++] = 0x0;
979 arr[num++] = 0x1; /* relative port A */
980 }
981 /* NAA-5, Target port identifier */
982 arr[num++] = 0x61; /* proto=sas, binary */
983 arr[num++] = 0x93; /* piv=1, target port, naa */
984 arr[num++] = 0x0;
985 arr[num++] = 0x8;
986 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
987 arr[num++] = 0x22;
988 arr[num++] = 0x22;
989 arr[num++] = 0x20;
990 arr[num++] = (port_a >> 24);
991 arr[num++] = (port_a >> 16) & 0xff;
992 arr[num++] = (port_a >> 8) & 0xff;
993 arr[num++] = port_a & 0xff;
5a09e398
HR		 994 /* NAA-5, Target port group identifier */
995 arr[num++] = 0x61; /* proto=sas, binary */
996 arr[num++] = 0x95; /* piv=1, target port group id */
997 arr[num++] = 0x0;
998 arr[num++] = 0x4;
999 arr[num++] = 0;
1000 arr[num++] = 0;
1001 arr[num++] = (port_group_id >> 8) & 0xff;
1002 arr[num++] = port_group_id & 0xff;
c65b1445
DG		 1003 /* NAA-5, Target device identifier */
1004 arr[num++] = 0x61; /* proto=sas, binary */
1005 arr[num++] = 0xa3; /* piv=1, target device, naa */
1006 arr[num++] = 0x0;
1007 arr[num++] = 0x8;
1008 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
1009 arr[num++] = 0x22;
1010 arr[num++] = 0x22;
1011 arr[num++] = 0x20;
1012 arr[num++] = (target_dev_id >> 24);
1013 arr[num++] = (target_dev_id >> 16) & 0xff;
1014 arr[num++] = (target_dev_id >> 8) & 0xff;
1015 arr[num++] = target_dev_id & 0xff;
1016 /* SCSI name string: Target device identifier */
1017 arr[num++] = 0x63; /* proto=sas, UTF-8 */
1018 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
1019 arr[num++] = 0x0;
1020 arr[num++] = 24;
1021 memcpy(arr + num, "naa.52222220", 12);
1022 num += 12;
1023 snprintf(b, sizeof(b), "%08X", target_dev_id);
1024 memcpy(arr + num, b, 8);
1025 num += 8;
1026 memset(arr + num, 0, 4);
1027 num += 4;
1028 return num;
1029}
1030
1031
1032static unsigned char vpd84_data[] = {
1033/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
1034 0x22,0x22,0x22,0x0,0xbb,0x1,
1035 0x22,0x22,0x22,0x0,0xbb,0x2,
1036};
1037
cbf67842 1038/* Software interface identification VPD page */
c65b1445
DG		 1039static int inquiry_evpd_84(unsigned char * arr)
1040{
1041 memcpy(arr, vpd84_data, sizeof(vpd84_data));
1042 return sizeof(vpd84_data);
1043}
1044
cbf67842 1045/* Management network addresses VPD page */
c65b1445
DG		 1046static int inquiry_evpd_85(unsigned char * arr)
1047{
1048 int num = 0;
1049 const char * na1 = "https://www.kernel.org/config";
1050 const char * na2 = "http://www.kernel.org/log";
1051 int plen, olen;
1052
1053 arr[num++] = 0x1; /* lu, storage config */
1054 arr[num++] = 0x0; /* reserved */
1055 arr[num++] = 0x0;
1056 olen = strlen(na1);
1057 plen = olen + 1;
1058 if (plen % 4)
1059 plen = ((plen / 4) + 1) * 4;
1060 arr[num++] = plen; /* length, null termianted, padded */
1061 memcpy(arr + num, na1, olen);
1062 memset(arr + num + olen, 0, plen - olen);
1063 num += plen;
1064
1065 arr[num++] = 0x4; /* lu, logging */
1066 arr[num++] = 0x0; /* reserved */
1067 arr[num++] = 0x0;
1068 olen = strlen(na2);
1069 plen = olen + 1;
1070 if (plen % 4)
1071 plen = ((plen / 4) + 1) * 4;
1072 arr[num++] = plen; /* length, null terminated, padded */
1073 memcpy(arr + num, na2, olen);
1074 memset(arr + num + olen, 0, plen - olen);
1075 num += plen;
1076
1077 return num;
1078}
1079
1080/* SCSI ports VPD page */
1081static int inquiry_evpd_88(unsigned char * arr, int target_dev_id)
1082{
1083 int num = 0;
1084 int port_a, port_b;
1085
1086 port_a = target_dev_id + 1;
1087 port_b = port_a + 1;
1088 arr[num++] = 0x0; /* reserved */
1089 arr[num++] = 0x0; /* reserved */
1090 arr[num++] = 0x0;
1091 arr[num++] = 0x1; /* relative port 1 (primary) */
1092 memset(arr + num, 0, 6);
1093 num += 6;
1094 arr[num++] = 0x0;
1095 arr[num++] = 12; /* length tp descriptor */
1096 /* naa-5 target port identifier (A) */
1097 arr[num++] = 0x61; /* proto=sas, binary */
1098 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1099 arr[num++] = 0x0; /* reserved */
1100 arr[num++] = 0x8; /* length */
1101 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
1102 arr[num++] = 0x22;
1103 arr[num++] = 0x22;
1104 arr[num++] = 0x20;
1105 arr[num++] = (port_a >> 24);
1106 arr[num++] = (port_a >> 16) & 0xff;
1107 arr[num++] = (port_a >> 8) & 0xff;
1108 arr[num++] = port_a & 0xff;
1109
1110 arr[num++] = 0x0; /* reserved */
1111 arr[num++] = 0x0; /* reserved */
1112 arr[num++] = 0x0;
1113 arr[num++] = 0x2; /* relative port 2 (secondary) */
1114 memset(arr + num, 0, 6);
1115 num += 6;
1116 arr[num++] = 0x0;
1117 arr[num++] = 12; /* length tp descriptor */
1118 /* naa-5 target port identifier (B) */
1119 arr[num++] = 0x61; /* proto=sas, binary */
1120 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1121 arr[num++] = 0x0; /* reserved */
1122 arr[num++] = 0x8; /* length */
1123 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
1124 arr[num++] = 0x22;
1125 arr[num++] = 0x22;
1126 arr[num++] = 0x20;
1127 arr[num++] = (port_b >> 24);
1128 arr[num++] = (port_b >> 16) & 0xff;
1129 arr[num++] = (port_b >> 8) & 0xff;
1130 arr[num++] = port_b & 0xff;
1131
1132 return num;
1133}
1134
1135
1136static unsigned char vpd89_data[] = {
1137/* from 4th byte */ 0,0,0,0,
1138'l','i','n','u','x',' ',' ',' ',
1139'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
1140'1','2','3','4',
11410x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
11420xec,0,0,0,
11430x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
11440,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
11450x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
11460x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
11470x53,0x41,
11480x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
11490x20,0x20,
11500x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
11510x10,0x80,
11520,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
11530x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
11540x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
11550,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
11560x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
11570x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
11580,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
11590,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11600,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11610,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11620x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
11630,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
11640xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
11650,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
11660,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11670,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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,
11770,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
1178};
1179
cbf67842 1180/* ATA Information VPD page */
c65b1445
DG		 1181static int inquiry_evpd_89(unsigned char * arr)
1182{
1183 memcpy(arr, vpd89_data, sizeof(vpd89_data));
1184 return sizeof(vpd89_data);
1185}
1186
1187
1188static unsigned char vpdb0_data[] = {
1e49f785
DG		 1189 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
1190 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1191 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1192 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
c65b1445
DG		 1193};
1194
cbf67842 1195/* Block limits VPD page (SBC-3) */
c65b1445
DG		 1196static int inquiry_evpd_b0(unsigned char * arr)
1197{
ea61fca5
MP		 1198 unsigned int gran;
1199
c65b1445 1200 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
e308b3d1
MP		 1201
1202 /* Optimal transfer length granularity */
ea61fca5
MP		 1203 gran = 1 << scsi_debug_physblk_exp;
1204 arr[2] = (gran >> 8) & 0xff;
1205 arr[3] = gran & 0xff;
e308b3d1
MP		 1206
1207 /* Maximum Transfer Length */
c65b1445
DG		 1208 if (sdebug_store_sectors > 0x400) {
1209 arr[4] = (sdebug_store_sectors >> 24) & 0xff;
1210 arr[5] = (sdebug_store_sectors >> 16) & 0xff;
1211 arr[6] = (sdebug_store_sectors >> 8) & 0xff;
1212 arr[7] = sdebug_store_sectors & 0xff;
1213 }
44d92694 1214
e308b3d1
MP		 1215 /* Optimal Transfer Length */
1216 put_unaligned_be32(scsi_debug_opt_blks, &arr[8]);
1217
5b94e232 1218 if (scsi_debug_lbpu) {
e308b3d1 1219 /* Maximum Unmap LBA Count */
6014759c 1220 put_unaligned_be32(scsi_debug_unmap_max_blocks, &arr[16]);
e308b3d1
MP		 1221
1222 /* Maximum Unmap Block Descriptor Count */
44d92694
MP		 1223 put_unaligned_be32(scsi_debug_unmap_max_desc, &arr[20]);
1224 }
1225
e308b3d1 1226 /* Unmap Granularity Alignment */
44d92694
MP		 1227 if (scsi_debug_unmap_alignment) {
1228 put_unaligned_be32(scsi_debug_unmap_alignment, &arr[28]);
1229 arr[28] |= 0x80; /* UGAVALID */
1230 }
1231
e308b3d1 1232 /* Optimal Unmap Granularity */
6014759c
MP		 1233 put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]);
1234
5b94e232
MP		 1235 /* Maximum WRITE SAME Length */
1236 put_unaligned_be64(scsi_debug_write_same_length, &arr[32]);
1237
1238 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
44d92694 1239
c65b1445 1240 return sizeof(vpdb0_data);
1da177e4
LT		 1241}
1242
1e49f785 1243/* Block device characteristics VPD page (SBC-3) */
eac6e8e4
MW		 1244static int inquiry_evpd_b1(unsigned char *arr)
1245{
1246 memset(arr, 0, 0x3c);
1247 arr[0] = 0;
1e49f785
DG		 1248 arr[1] = 1; /* non rotating medium (e.g. solid state) */
1249 arr[2] = 0;
1250 arr[3] = 5; /* less than 1.8" */
eac6e8e4
MW		 1251
1252 return 0x3c;
1253}
1da177e4 1254
be1dd78d 1255/* Logical block provisioning VPD page (SBC-3) */
6014759c
MP		 1256static int inquiry_evpd_b2(unsigned char *arr)
1257{
3f0bc3b3 1258 memset(arr, 0, 0x4);
6014759c
MP		 1259 arr[0] = 0; /* threshold exponent */
1260
5b94e232 1261 if (scsi_debug_lbpu)
6014759c
MP		 1262 arr[1] = 1 << 7;
1263
5b94e232 1264 if (scsi_debug_lbpws)
6014759c
MP		 1265 arr[1] |= 1 << 6;
1266
5b94e232
MP		 1267 if (scsi_debug_lbpws10)
1268 arr[1] |= 1 << 5;
1269
be1dd78d
ES		 1270 if (scsi_debug_lbprz)
1271 arr[1] |= 1 << 2;
1272
3f0bc3b3 1273 return 0x4;
6014759c
MP		 1274}
1275
1da177e4 1276#define SDEBUG_LONG_INQ_SZ 96
c65b1445 1277#define SDEBUG_MAX_INQ_ARR_SZ 584
1da177e4 1278
c2248fc9 1279static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1da177e4
LT		 1280{
1281 unsigned char pq_pdt;
5a09e398 1282 unsigned char * arr;
01123ef4 1283 unsigned char *cmd = scp->cmnd;
5a09e398 1284 int alloc_len, n, ret;
c2248fc9 1285 bool have_wlun;
1da177e4
LT		 1286
1287 alloc_len = (cmd[3] << 8) + cmd[4];
6f3cbf55
DG		 1288 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
1289 if (! arr)
1290 return DID_REQUEUE << 16;
c2248fc9
DG		 1291 have_wlun = (scp->device->lun == SAM2_WLUN_REPORT_LUNS);
1292 if (have_wlun)
c65b1445
DG		 1293 pq_pdt = 0x1e; /* present, wlun */
1294 else if (scsi_debug_no_lun_0 && (0 == devip->lun))
1295 pq_pdt = 0x7f; /* not present, no device type */
1296 else
1297 pq_pdt = (scsi_debug_ptype & 0x1f);
1da177e4
LT		 1298 arr[0] = pq_pdt;
1299 if (0x2 & cmd[1]) { /* CMDDT bit set */
22017ed2 1300 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
5a09e398 1301 kfree(arr);
1da177e4
LT		 1302 return check_condition_result;
1303 } else if (0x1 & cmd[1]) { /* EVPD bit set */
5a09e398 1304 int lu_id_num, port_group_id, target_dev_id, len;
c65b1445
DG		 1305 char lu_id_str[6];
1306 int host_no = devip->sdbg_host->shost->host_no;
1da177e4 1307
5a09e398
HR		 1308 port_group_id = (((host_no + 1) & 0x7f) << 8) +
1309 (devip->channel & 0x7f);
23183910
DG		 1310 if (0 == scsi_debug_vpd_use_hostno)
1311 host_no = 0;
c2248fc9 1312 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) +
c65b1445
DG		 1313 (devip->target * 1000) + devip->lun);
1314 target_dev_id = ((host_no + 1) * 2000) +
1315 (devip->target * 1000) - 3;
1316 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
1da177e4 1317 if (0 == cmd[2]) { /* supported vital product data pages */
c65b1445
DG		 1318 arr[1] = cmd[2]; /*sanity */
1319 n = 4;
1320 arr[n++] = 0x0; /* this page */
1321 arr[n++] = 0x80; /* unit serial number */
1322 arr[n++] = 0x83; /* device identification */
1323 arr[n++] = 0x84; /* software interface ident. */
1324 arr[n++] = 0x85; /* management network addresses */
1325 arr[n++] = 0x86; /* extended inquiry */
1326 arr[n++] = 0x87; /* mode page policy */
1327 arr[n++] = 0x88; /* SCSI ports */
1328 arr[n++] = 0x89; /* ATA information */
1329 arr[n++] = 0xb0; /* Block limits (SBC) */
eac6e8e4 1330 arr[n++] = 0xb1; /* Block characteristics (SBC) */
5b94e232
MP		 1331 if (scsi_debug_lbp()) /* Logical Block Prov. (SBC) */
1332 arr[n++] = 0xb2;
c65b1445 1333 arr[3] = n - 4; /* number of supported VPD pages */
1da177e4 1334 } else if (0x80 == cmd[2]) { /* unit serial number */
c65b1445 1335 arr[1] = cmd[2]; /*sanity */
1da177e4 1336 arr[3] = len;
c65b1445 1337 memcpy(&arr[4], lu_id_str, len);
1da177e4 1338 } else if (0x83 == cmd[2]) { /* device identification */
c65b1445 1339 arr[1] = cmd[2]; /*sanity */
5a09e398
HR		 1340 arr[3] = inquiry_evpd_83(&arr[4], port_group_id,
1341 target_dev_id, lu_id_num,
1342 lu_id_str, len);
c65b1445
DG		 1343 } else if (0x84 == cmd[2]) { /* Software interface ident. */
1344 arr[1] = cmd[2]; /*sanity */
1345 arr[3] = inquiry_evpd_84(&arr[4]);
1346 } else if (0x85 == cmd[2]) { /* Management network addresses */
1347 arr[1] = cmd[2]; /*sanity */
1348 arr[3] = inquiry_evpd_85(&arr[4]);
1349 } else if (0x86 == cmd[2]) { /* extended inquiry */
1350 arr[1] = cmd[2]; /*sanity */
1351 arr[3] = 0x3c; /* number of following entries */
c6a44287
MP		 1352 if (scsi_debug_dif == SD_DIF_TYPE3_PROTECTION)
1353 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
1354 else if (scsi_debug_dif)
1355 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
1356 else
1357 arr[4] = 0x0; /* no protection stuff */
c65b1445
DG		 1358 arr[5] = 0x7; /* head of q, ordered + simple q's */
1359 } else if (0x87 == cmd[2]) { /* mode page policy */
1360 arr[1] = cmd[2]; /*sanity */
1361 arr[3] = 0x8; /* number of following entries */
1362 arr[4] = 0x2; /* disconnect-reconnect mp */
1363 arr[6] = 0x80; /* mlus, shared */
1364 arr[8] = 0x18; /* protocol specific lu */
1365 arr[10] = 0x82; /* mlus, per initiator port */
1366 } else if (0x88 == cmd[2]) { /* SCSI Ports */
1367 arr[1] = cmd[2]; /*sanity */
1368 arr[3] = inquiry_evpd_88(&arr[4], target_dev_id);
1369 } else if (0x89 == cmd[2]) { /* ATA information */
1370 arr[1] = cmd[2]; /*sanity */
1371 n = inquiry_evpd_89(&arr[4]);
1372 arr[2] = (n >> 8);
1373 arr[3] = (n & 0xff);
1374 } else if (0xb0 == cmd[2]) { /* Block limits (SBC) */
1375 arr[1] = cmd[2]; /*sanity */
1376 arr[3] = inquiry_evpd_b0(&arr[4]);
eac6e8e4
MW		 1377 } else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */
1378 arr[1] = cmd[2]; /*sanity */
1379 arr[3] = inquiry_evpd_b1(&arr[4]);
5b94e232 1380 } else if (0xb2 == cmd[2]) { /* Logical Block Prov. (SBC) */
6014759c
MP		 1381 arr[1] = cmd[2]; /*sanity */
1382 arr[3] = inquiry_evpd_b2(&arr[4]);
1da177e4 1383 } else {
22017ed2 1384 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
5a09e398 1385 kfree(arr);
1da177e4
LT		 1386 return check_condition_result;
1387 }
c65b1445 1388 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
5a09e398 1389 ret = fill_from_dev_buffer(scp, arr,
c65b1445 1390 min(len, SDEBUG_MAX_INQ_ARR_SZ));
5a09e398
HR		 1391 kfree(arr);
1392 return ret;
1da177e4
LT		 1393 }
1394 /* drops through here for a standard inquiry */
d986788b 1395 arr[1] = scsi_debug_removable ? 0x80 : 0; /* Removable disk */
1da177e4
LT		 1396 arr[2] = scsi_debug_scsi_level;
1397 arr[3] = 2; /* response_data_format==2 */
1398 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
c6a44287 1399 arr[5] = scsi_debug_dif ? 1 : 0; /* PROTECT bit */
5a09e398
HR		 1400 if (0 == scsi_debug_vpd_use_hostno)
1401 arr[5] = 0x10; /* claim: implicit TGPS */
c65b1445 1402 arr[6] = 0x10; /* claim: MultiP */
1da177e4 1403 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
c65b1445 1404 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
1da177e4
LT		 1405 memcpy(&arr[8], inq_vendor_id, 8);
1406 memcpy(&arr[16], inq_product_id, 16);
1407 memcpy(&arr[32], inq_product_rev, 4);
1408 /* version descriptors (2 bytes each) follow */
e46b0344
DG		 1409 arr[58] = 0x0; arr[59] = 0xa2; /* SAM-5 rev 4 */
1410 arr[60] = 0x4; arr[61] = 0x68; /* SPC-4 rev 37 */
c65b1445 1411 n = 62;
1da177e4 1412 if (scsi_debug_ptype == 0) {
e46b0344 1413 arr[n++] = 0x4; arr[n++] = 0xc5; /* SBC-4 rev 36 */
1da177e4 1414 } else if (scsi_debug_ptype == 1) {
e46b0344 1415 arr[n++] = 0x5; arr[n++] = 0x25; /* SSC-4 rev 3 */
1da177e4 1416 }
e46b0344 1417 arr[n++] = 0x20; arr[n++] = 0xe6; /* SPL-3 rev 7 */
5a09e398 1418 ret = fill_from_dev_buffer(scp, arr,
1da177e4 1419 min(alloc_len, SDEBUG_LONG_INQ_SZ));
5a09e398
HR		 1420 kfree(arr);
1421 return ret;
1da177e4
LT		 1422}
1423
1424static int resp_requests(struct scsi_cmnd * scp,
1425 struct sdebug_dev_info * devip)
1426{
1427 unsigned char * sbuff;
01123ef4 1428 unsigned char *cmd = scp->cmnd;
cbf67842 1429 unsigned char arr[SCSI_SENSE_BUFFERSIZE];
c2248fc9 1430 bool dsense, want_dsense;
1da177e4
LT		 1431 int len = 18;
1432
c65b1445 1433 memset(arr, 0, sizeof(arr));
c2248fc9
DG		 1434 dsense = !!(cmd[1] & 1);
1435 want_dsense = dsense || scsi_debug_dsense;
cbf67842 1436 sbuff = scp->sense_buffer;
c65b1445 1437 if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
c2248fc9 1438 if (dsense) {
c65b1445
DG		 1439 arr[0] = 0x72;
1440 arr[1] = 0x0; /* NO_SENSE in sense_key */
1441 arr[2] = THRESHOLD_EXCEEDED;
1442 arr[3] = 0xff; /* TEST set and MRIE==6 */
c2248fc9 1443 len = 8;
c65b1445
DG		 1444 } else {
1445 arr[0] = 0x70;
1446 arr[2] = 0x0; /* NO_SENSE in sense_key */
1447 arr[7] = 0xa; /* 18 byte sense buffer */
1448 arr[12] = THRESHOLD_EXCEEDED;
1449 arr[13] = 0xff; /* TEST set and MRIE==6 */
1450 }
c65b1445 1451 } else {
cbf67842 1452 memcpy(arr, sbuff, SCSI_SENSE_BUFFERSIZE);
c2248fc9
DG		 1453 if (arr[0] >= 0x70 && dsense == scsi_debug_dsense)
1454 ; /* have sense and formats match */
1455 else if (arr[0] <= 0x70) {
1456 if (dsense) {
1457 memset(arr, 0, 8);
1458 arr[0] = 0x72;
1459 len = 8;
1460 } else {
1461 memset(arr, 0, 18);
1462 arr[0] = 0x70;
1463 arr[7] = 0xa;
1464 }
1465 } else if (dsense) {
1466 memset(arr, 0, 8);
c65b1445
DG		 1467 arr[0] = 0x72;
1468 arr[1] = sbuff[2]; /* sense key */
1469 arr[2] = sbuff[12]; /* asc */
1470 arr[3] = sbuff[13]; /* ascq */
1471 len = 8;
c2248fc9
DG		 1472 } else {
1473 memset(arr, 0, 18);
1474 arr[0] = 0x70;
1475 arr[2] = sbuff[1];
1476 arr[7] = 0xa;
1477 arr[12] = sbuff[1];
1478 arr[13] = sbuff[3];
c65b1445 1479 }
c2248fc9 1480
c65b1445 1481 }
cbf67842 1482 mk_sense_buffer(scp, 0, NO_ADDITIONAL_SENSE, 0);
1da177e4
LT		 1483 return fill_from_dev_buffer(scp, arr, len);
1484}
1485
c65b1445
DG		 1486static int resp_start_stop(struct scsi_cmnd * scp,
1487 struct sdebug_dev_info * devip)
1488{
01123ef4 1489 unsigned char *cmd = scp->cmnd;
c2248fc9 1490 int power_cond, start;
c65b1445 1491
c65b1445
DG		 1492 power_cond = (cmd[4] & 0xf0) >> 4;
1493 if (power_cond) {
22017ed2 1494 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
c65b1445
DG		 1495 return check_condition_result;
1496 }
1497 start = cmd[4] & 1;
1498 if (start == devip->stopped)
1499 devip->stopped = !start;
1500 return 0;
1501}
1502
28898873
FT		 1503static sector_t get_sdebug_capacity(void)
1504{
1505 if (scsi_debug_virtual_gb > 0)
5447ed6c
DG		 1506 return (sector_t)scsi_debug_virtual_gb *
1507 (1073741824 / scsi_debug_sector_size);
28898873
FT		 1508 else
1509 return sdebug_store_sectors;
1510}
1511
1da177e4
LT		 1512#define SDEBUG_READCAP_ARR_SZ 8
1513static int resp_readcap(struct scsi_cmnd * scp,
1514 struct sdebug_dev_info * devip)
1515{
1516 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
c65b1445 1517 unsigned int capac;
1da177e4 1518
c65b1445 1519 /* following just in case virtual_gb changed */
28898873 1520 sdebug_capacity = get_sdebug_capacity();
1da177e4 1521 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
c65b1445
DG		 1522 if (sdebug_capacity < 0xffffffff) {
1523 capac = (unsigned int)sdebug_capacity - 1;
1524 arr[0] = (capac >> 24);
1525 arr[1] = (capac >> 16) & 0xff;
1526 arr[2] = (capac >> 8) & 0xff;
1527 arr[3] = capac & 0xff;
1528 } else {
1529 arr[0] = 0xff;
1530 arr[1] = 0xff;
1531 arr[2] = 0xff;
1532 arr[3] = 0xff;
1533 }
597136ab
MP		 1534 arr[6] = (scsi_debug_sector_size >> 8) & 0xff;
1535 arr[7] = scsi_debug_sector_size & 0xff;
1da177e4
LT		 1536 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1537}
1538
c65b1445
DG		 1539#define SDEBUG_READCAP16_ARR_SZ 32
1540static int resp_readcap16(struct scsi_cmnd * scp,
1541 struct sdebug_dev_info * devip)
1542{
01123ef4 1543 unsigned char *cmd = scp->cmnd;
c65b1445
DG		 1544 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
1545 unsigned long long capac;
c2248fc9 1546 int k, alloc_len;
c65b1445 1547
c65b1445
DG		 1548 alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8)
1549 + cmd[13]);
1550 /* following just in case virtual_gb changed */
28898873 1551 sdebug_capacity = get_sdebug_capacity();
c65b1445
DG		 1552 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
1553 capac = sdebug_capacity - 1;
1554 for (k = 0; k < 8; ++k, capac >>= 8)
1555 arr[7 - k] = capac & 0xff;
597136ab
MP		 1556 arr[8] = (scsi_debug_sector_size >> 24) & 0xff;
1557 arr[9] = (scsi_debug_sector_size >> 16) & 0xff;
1558 arr[10] = (scsi_debug_sector_size >> 8) & 0xff;
1559 arr[11] = scsi_debug_sector_size & 0xff;
ea61fca5
MP		 1560 arr[13] = scsi_debug_physblk_exp & 0xf;
1561 arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f;
44d92694 1562
be1dd78d 1563 if (scsi_debug_lbp()) {
5b94e232 1564 arr[14] |= 0x80; /* LBPME */
be1dd78d
ES		 1565 if (scsi_debug_lbprz)
1566 arr[14] |= 0x40; /* LBPRZ */
1567 }
44d92694 1568
ea61fca5 1569 arr[15] = scsi_debug_lowest_aligned & 0xff;
c6a44287
MP		 1570
1571 if (scsi_debug_dif) {
1572 arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */
1573 arr[12] |= 1; /* PROT_EN */
1574 }
1575
c65b1445
DG		 1576 return fill_from_dev_buffer(scp, arr,
1577 min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
1578}
1579
5a09e398
HR		 1580#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1581
1582static int resp_report_tgtpgs(struct scsi_cmnd * scp,
1583 struct sdebug_dev_info * devip)
1584{
01123ef4 1585 unsigned char *cmd = scp->cmnd;
5a09e398
HR		 1586 unsigned char * arr;
1587 int host_no = devip->sdbg_host->shost->host_no;
1588 int n, ret, alen, rlen;
1589 int port_group_a, port_group_b, port_a, port_b;
1590
1591 alen = ((cmd[6] << 24) + (cmd[7] << 16) + (cmd[8] << 8)
1592 + cmd[9]);
1593
6f3cbf55
DG		 1594 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1595 if (! arr)
1596 return DID_REQUEUE << 16;
5a09e398
HR		 1597 /*
1598 * EVPD page 0x88 states we have two ports, one
1599 * real and a fake port with no device connected.
1600 * So we create two port groups with one port each
1601 * and set the group with port B to unavailable.
1602 */
1603 port_a = 0x1; /* relative port A */
1604 port_b = 0x2; /* relative port B */
1605 port_group_a = (((host_no + 1) & 0x7f) << 8) +
1606 (devip->channel & 0x7f);
1607 port_group_b = (((host_no + 1) & 0x7f) << 8) +
1608 (devip->channel & 0x7f) + 0x80;
1609
1610 /*
1611 * The asymmetric access state is cycled according to the host_id.
1612 */
1613 n = 4;
1614 if (0 == scsi_debug_vpd_use_hostno) {
1615 arr[n++] = host_no % 3; /* Asymm access state */
1616 arr[n++] = 0x0F; /* claim: all states are supported */
1617 } else {
1618 arr[n++] = 0x0; /* Active/Optimized path */
1619 arr[n++] = 0x01; /* claim: only support active/optimized paths */
1620 }
1621 arr[n++] = (port_group_a >> 8) & 0xff;
1622 arr[n++] = port_group_a & 0xff;
1623 arr[n++] = 0; /* Reserved */
1624 arr[n++] = 0; /* Status code */
1625 arr[n++] = 0; /* Vendor unique */
1626 arr[n++] = 0x1; /* One port per group */
1627 arr[n++] = 0; /* Reserved */
1628 arr[n++] = 0; /* Reserved */
1629 arr[n++] = (port_a >> 8) & 0xff;
1630 arr[n++] = port_a & 0xff;
1631 arr[n++] = 3; /* Port unavailable */
1632 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
1633 arr[n++] = (port_group_b >> 8) & 0xff;
1634 arr[n++] = port_group_b & 0xff;
1635 arr[n++] = 0; /* Reserved */
1636 arr[n++] = 0; /* Status code */
1637 arr[n++] = 0; /* Vendor unique */
1638 arr[n++] = 0x1; /* One port per group */
1639 arr[n++] = 0; /* Reserved */
1640 arr[n++] = 0; /* Reserved */
1641 arr[n++] = (port_b >> 8) & 0xff;
1642 arr[n++] = port_b & 0xff;
1643
1644 rlen = n - 4;
1645 arr[0] = (rlen >> 24) & 0xff;
1646 arr[1] = (rlen >> 16) & 0xff;
1647 arr[2] = (rlen >> 8) & 0xff;
1648 arr[3] = rlen & 0xff;
1649
1650 /*
1651 * Return the smallest value of either
1652 * - The allocated length
1653 * - The constructed command length
1654 * - The maximum array size
1655 */
1656 rlen = min(alen,n);
1657 ret = fill_from_dev_buffer(scp, arr,
1658 min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1659 kfree(arr);
1660 return ret;
1661}
1662
38d5c833
DG		 1663static int
1664resp_rsup_opcodes(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1665{
1666 bool rctd;
1667 u8 reporting_opts, req_opcode, sdeb_i, supp;
1668 u16 req_sa, u;
1669 u32 alloc_len, a_len;
1670 int k, offset, len, errsts, count, bump, na;
1671 const struct opcode_info_t *oip;
1672 const struct opcode_info_t *r_oip;
1673 u8 *arr;
1674 u8 *cmd = scp->cmnd;
1675
1676 rctd = !!(cmd[2] & 0x80);
1677 reporting_opts = cmd[2] & 0x7;
1678 req_opcode = cmd[3];
1679 req_sa = get_unaligned_be16(cmd + 4);
1680 alloc_len = get_unaligned_be32(cmd + 6);
6d310dfb 1681 if (alloc_len < 4 || alloc_len > 0xffff) {
38d5c833
DG		 1682 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1683 return check_condition_result;
1684 }
1685 if (alloc_len > 8192)
1686 a_len = 8192;
1687 else
1688 a_len = alloc_len;
99531e60 1689 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC);
38d5c833
DG		 1690 if (NULL == arr) {
1691 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
1692 INSUFF_RES_ASCQ);
1693 return check_condition_result;
1694 }
1695 switch (reporting_opts) {
1696 case 0: /* all commands */
1697 /* count number of commands */
1698 for (count = 0, oip = opcode_info_arr;
1699 oip->num_attached != 0xff; ++oip) {
1700 if (F_INV_OP & oip->flags)
1701 continue;
1702 count += (oip->num_attached + 1);
1703 }
1704 bump = rctd ? 20 : 8;
1705 put_unaligned_be32(count * bump, arr);
1706 for (offset = 4, oip = opcode_info_arr;
1707 oip->num_attached != 0xff && offset < a_len; ++oip) {
1708 if (F_INV_OP & oip->flags)
1709 continue;
1710 na = oip->num_attached;
1711 arr[offset] = oip->opcode;
1712 put_unaligned_be16(oip->sa, arr + offset + 2);
1713 if (rctd)
1714 arr[offset + 5] |= 0x2;
1715 if (FF_SA & oip->flags)
1716 arr[offset + 5] |= 0x1;
1717 put_unaligned_be16(oip->len_mask[0], arr + offset + 6);
1718 if (rctd)
1719 put_unaligned_be16(0xa, arr + offset + 8);
1720 r_oip = oip;
1721 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) {
1722 if (F_INV_OP & oip->flags)
1723 continue;
1724 offset += bump;
1725 arr[offset] = oip->opcode;
1726 put_unaligned_be16(oip->sa, arr + offset + 2);
1727 if (rctd)
1728 arr[offset + 5] |= 0x2;
1729 if (FF_SA & oip->flags)
1730 arr[offset + 5] |= 0x1;
1731 put_unaligned_be16(oip->len_mask[0],
1732 arr + offset + 6);
1733 if (rctd)
1734 put_unaligned_be16(0xa,
1735 arr + offset + 8);
1736 }
1737 oip = r_oip;
1738 offset += bump;
1739 }
1740 break;
1741 case 1: /* one command: opcode only */
1742 case 2: /* one command: opcode plus service action */
1743 case 3: /* one command: if sa==0 then opcode only else opcode+sa */
1744 sdeb_i = opcode_ind_arr[req_opcode];
1745 oip = &opcode_info_arr[sdeb_i];
1746 if (F_INV_OP & oip->flags) {
1747 supp = 1;
1748 offset = 4;
1749 } else {
1750 if (1 == reporting_opts) {
1751 if (FF_SA & oip->flags) {
1752 mk_sense_invalid_fld(scp, SDEB_IN_CDB,
1753 2, 2);
1754 kfree(arr);
1755 return check_condition_result;
1756 }
1757 req_sa = 0;
1758 } else if (2 == reporting_opts &&
1759 0 == (FF_SA & oip->flags)) {
1760 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
1761 kfree(arr); /* point at requested sa */
1762 return check_condition_result;
1763 }
1764 if (0 == (FF_SA & oip->flags) &&
1765 req_opcode == oip->opcode)
1766 supp = 3;
1767 else if (0 == (FF_SA & oip->flags)) {
1768 na = oip->num_attached;
1769 for (k = 0, oip = oip->arrp; k < na;
1770 ++k, ++oip) {
1771 if (req_opcode == oip->opcode)
1772 break;
1773 }
1774 supp = (k >= na) ? 1 : 3;
1775 } else if (req_sa != oip->sa) {
1776 na = oip->num_attached;
1777 for (k = 0, oip = oip->arrp; k < na;
1778 ++k, ++oip) {
1779 if (req_sa == oip->sa)
1780 break;
1781 }
1782 supp = (k >= na) ? 1 : 3;
1783 } else
1784 supp = 3;
1785 if (3 == supp) {
1786 u = oip->len_mask[0];
1787 put_unaligned_be16(u, arr + 2);
1788 arr[4] = oip->opcode;
1789 for (k = 1; k < u; ++k)
1790 arr[4 + k] = (k < 16) ?
1791 oip->len_mask[k] : 0xff;
1792 offset = 4 + u;
1793 } else
1794 offset = 4;
1795 }
1796 arr[1] = (rctd ? 0x80 : 0) | supp;
1797 if (rctd) {
1798 put_unaligned_be16(0xa, arr + offset);
1799 offset += 12;
1800 }
1801 break;
1802 default:
1803 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
1804 kfree(arr);
1805 return check_condition_result;
1806 }
1807 offset = (offset < a_len) ? offset : a_len;
1808 len = (offset < alloc_len) ? offset : alloc_len;
1809 errsts = fill_from_dev_buffer(scp, arr, len);
1810 kfree(arr);
1811 return errsts;
1812}
1813
1814static int
1815resp_rsup_tmfs(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1816{
1817 bool repd;
1818 u32 alloc_len, len;
1819 u8 arr[16];
1820 u8 *cmd = scp->cmnd;
1821
1822 memset(arr, 0, sizeof(arr));
1823 repd = !!(cmd[2] & 0x80);
1824 alloc_len = get_unaligned_be32(cmd + 6);
1825 if (alloc_len < 4) {
1826 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1827 return check_condition_result;
1828 }
1829 arr[0] = 0xc8; /* ATS | ATSS | LURS */
1830 arr[1] = 0x1; /* ITNRS */
1831 if (repd) {
1832 arr[3] = 0xc;
1833 len = 16;
1834 } else
1835 len = 4;
1836
1837 len = (len < alloc_len) ? len : alloc_len;
1838 return fill_from_dev_buffer(scp, arr, len);
1839}
1840
1da177e4
LT		 1841/* <<Following mode page info copied from ST318451LW>> */
1842
1843static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target)
1844{ /* Read-Write Error Recovery page for mode_sense */
1845 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
1846 5, 0, 0xff, 0xff};
1847
1848 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
1849 if (1 == pcontrol)
1850 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
1851 return sizeof(err_recov_pg);
1852}
1853
1854static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target)
1855{ /* Disconnect-Reconnect page for mode_sense */
1856 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
1857 0, 0, 0, 0, 0, 0, 0, 0};
1858
1859 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
1860 if (1 == pcontrol)
1861 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
1862 return sizeof(disconnect_pg);
1863}
1864
1865static int resp_format_pg(unsigned char * p, int pcontrol, int target)
1866{ /* Format device page for mode_sense */
597136ab
MP		 1867 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
1868 0, 0, 0, 0, 0, 0, 0, 0,
1869 0, 0, 0, 0, 0x40, 0, 0, 0};
1870
1871 memcpy(p, format_pg, sizeof(format_pg));
1872 p[10] = (sdebug_sectors_per >> 8) & 0xff;
1873 p[11] = sdebug_sectors_per & 0xff;
1874 p[12] = (scsi_debug_sector_size >> 8) & 0xff;
1875 p[13] = scsi_debug_sector_size & 0xff;
d986788b 1876 if (scsi_debug_removable)
597136ab
MP		 1877 p[20] |= 0x20; /* should agree with INQUIRY */
1878 if (1 == pcontrol)
1879 memset(p + 2, 0, sizeof(format_pg) - 2);
1880 return sizeof(format_pg);
1da177e4
LT		 1881}
1882
1883static int resp_caching_pg(unsigned char * p, int pcontrol, int target)
1884{ /* Caching page for mode_sense */
cbf67842
DG		 1885 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
1886 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
1887 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
1da177e4
LT		 1888 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
1889
cbf67842
DG		 1890 if (SCSI_DEBUG_OPT_N_WCE & scsi_debug_opts)
1891 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
1da177e4
LT		 1892 memcpy(p, caching_pg, sizeof(caching_pg));
1893 if (1 == pcontrol)
cbf67842
DG		 1894 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
1895 else if (2 == pcontrol)
1896 memcpy(p, d_caching_pg, sizeof(d_caching_pg));
1da177e4
LT		 1897 return sizeof(caching_pg);
1898}
1899
1900static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
1901{ /* Control mode page for mode_sense */
c65b1445
DG		 1902 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
1903 0, 0, 0, 0};
1904 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
1da177e4
LT		 1905 0, 0, 0x2, 0x4b};
1906
1907 if (scsi_debug_dsense)
1908 ctrl_m_pg[2] |= 0x4;
c65b1445
DG		 1909 else
1910 ctrl_m_pg[2] &= ~0x4;
c6a44287
MP		 1911
1912 if (scsi_debug_ato)
1913 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
1914
1da177e4
LT		 1915 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
1916 if (1 == pcontrol)
c65b1445
DG		 1917 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
1918 else if (2 == pcontrol)
1919 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
1da177e4
LT		 1920 return sizeof(ctrl_m_pg);
1921}
1922
c65b1445 1923
1da177e4
LT		 1924static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target)
1925{ /* Informational Exceptions control mode page for mode_sense */
c65b1445
DG		 1926 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
1927 0, 0, 0x0, 0x0};
1928 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1929 0, 0, 0x0, 0x0};
1930
1da177e4
LT		 1931 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
1932 if (1 == pcontrol)
c65b1445
DG		 1933 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
1934 else if (2 == pcontrol)
1935 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
1da177e4
LT		 1936 return sizeof(iec_m_pg);
1937}
1938
c65b1445
DG		 1939static int resp_sas_sf_m_pg(unsigned char * p, int pcontrol, int target)
1940{ /* SAS SSP mode page - short format for mode_sense */
1941 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
1942 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
1943
1944 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
1945 if (1 == pcontrol)
1946 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
1947 return sizeof(sas_sf_m_pg);
1948}
1949
1950
1951static int resp_sas_pcd_m_spg(unsigned char * p, int pcontrol, int target,
1952 int target_dev_id)
1953{ /* SAS phy control and discover mode page for mode_sense */
1954 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
1955 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
1956 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1957 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1958 0x2, 0, 0, 0, 0, 0, 0, 0,
1959 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1960 0, 0, 0, 0, 0, 0, 0, 0,
1961 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
1962 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1963 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1964 0x3, 0, 0, 0, 0, 0, 0, 0,
1965 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1966 0, 0, 0, 0, 0, 0, 0, 0,
1967 };
1968 int port_a, port_b;
1969
1970 port_a = target_dev_id + 1;
1971 port_b = port_a + 1;
1972 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
1973 p[20] = (port_a >> 24);
1974 p[21] = (port_a >> 16) & 0xff;
1975 p[22] = (port_a >> 8) & 0xff;
1976 p[23] = port_a & 0xff;
1977 p[48 + 20] = (port_b >> 24);
1978 p[48 + 21] = (port_b >> 16) & 0xff;
1979 p[48 + 22] = (port_b >> 8) & 0xff;
1980 p[48 + 23] = port_b & 0xff;
1981 if (1 == pcontrol)
1982 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
1983 return sizeof(sas_pcd_m_pg);
1984}
1985
1986static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol)
1987{ /* SAS SSP shared protocol specific port mode subpage */
1988 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
1989 0, 0, 0, 0, 0, 0, 0, 0,
1990 };
1991
1992 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
1993 if (1 == pcontrol)
1994 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
1995 return sizeof(sas_sha_m_pg);
1996}
1997
1da177e4
LT		 1998#define SDEBUG_MAX_MSENSE_SZ 256
1999
c2248fc9
DG		 2000static int
2001resp_mode_sense(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1da177e4 2002{
23183910
DG		 2003 unsigned char dbd, llbaa;
2004 int pcontrol, pcode, subpcode, bd_len;
1da177e4 2005 unsigned char dev_spec;
c2248fc9
DG		 2006 int k, alloc_len, msense_6, offset, len, target_dev_id;
2007 int target = scp->device->id;
1da177e4
LT		 2008 unsigned char * ap;
2009 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
01123ef4 2010 unsigned char *cmd = scp->cmnd;
1da177e4 2011
23183910 2012 dbd = !!(cmd[1] & 0x8);
1da177e4
LT		 2013 pcontrol = (cmd[2] & 0xc0) >> 6;
2014 pcode = cmd[2] & 0x3f;
2015 subpcode = cmd[3];
2016 msense_6 = (MODE_SENSE == cmd[0]);
23183910
DG		 2017 llbaa = msense_6 ? 0 : !!(cmd[1] & 0x10);
2018 if ((0 == scsi_debug_ptype) && (0 == dbd))
2019 bd_len = llbaa ? 16 : 8;
2020 else
2021 bd_len = 0;
1da177e4
LT		 2022 alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]);
2023 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
2024 if (0x3 == pcontrol) { /* Saving values not supported */
cbf67842 2025 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
1da177e4
LT		 2026 return check_condition_result;
2027 }
c65b1445
DG		 2028 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
2029 (devip->target * 1000) - 3;
23183910
DG		 2030 /* set DPOFUA bit for disks */
2031 if (0 == scsi_debug_ptype)
2032 dev_spec = (DEV_READONLY(target) ? 0x80 : 0x0) | 0x10;
2033 else
2034 dev_spec = 0x0;
1da177e4
LT		 2035 if (msense_6) {
2036 arr[2] = dev_spec;
23183910 2037 arr[3] = bd_len;
1da177e4
LT		 2038 offset = 4;
2039 } else {
2040 arr[3] = dev_spec;
23183910
DG		 2041 if (16 == bd_len)
2042 arr[4] = 0x1; /* set LONGLBA bit */
2043 arr[7] = bd_len; /* assume 255 or less */
1da177e4
LT		 2044 offset = 8;
2045 }
2046 ap = arr + offset;
28898873
FT		 2047 if ((bd_len > 0) && (!sdebug_capacity))
2048 sdebug_capacity = get_sdebug_capacity();
2049
23183910
DG		 2050 if (8 == bd_len) {
2051 if (sdebug_capacity > 0xfffffffe) {
2052 ap[0] = 0xff;
2053 ap[1] = 0xff;
2054 ap[2] = 0xff;
2055 ap[3] = 0xff;
2056 } else {
2057 ap[0] = (sdebug_capacity >> 24) & 0xff;
2058 ap[1] = (sdebug_capacity >> 16) & 0xff;
2059 ap[2] = (sdebug_capacity >> 8) & 0xff;
2060 ap[3] = sdebug_capacity & 0xff;
2061 }
597136ab
MP		 2062 ap[6] = (scsi_debug_sector_size >> 8) & 0xff;
2063 ap[7] = scsi_debug_sector_size & 0xff;
23183910
DG		 2064 offset += bd_len;
2065 ap = arr + offset;
2066 } else if (16 == bd_len) {
2067 unsigned long long capac = sdebug_capacity;
2068
2069 for (k = 0; k < 8; ++k, capac >>= 8)
2070 ap[7 - k] = capac & 0xff;
597136ab
MP		 2071 ap[12] = (scsi_debug_sector_size >> 24) & 0xff;
2072 ap[13] = (scsi_debug_sector_size >> 16) & 0xff;
2073 ap[14] = (scsi_debug_sector_size >> 8) & 0xff;
2074 ap[15] = scsi_debug_sector_size & 0xff;
23183910
DG		 2075 offset += bd_len;
2076 ap = arr + offset;
2077 }
1da177e4 2078
c65b1445
DG		 2079 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
2080 /* TODO: Control Extension page */
22017ed2 2081 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
1da177e4
LT		 2082 return check_condition_result;
2083 }
2084 switch (pcode) {
2085 case 0x1: /* Read-Write error recovery page, direct access */
2086 len = resp_err_recov_pg(ap, pcontrol, target);
2087 offset += len;
2088 break;
2089 case 0x2: /* Disconnect-Reconnect page, all devices */
2090 len = resp_disconnect_pg(ap, pcontrol, target);
2091 offset += len;
2092 break;
2093 case 0x3: /* Format device page, direct access */
2094 len = resp_format_pg(ap, pcontrol, target);
2095 offset += len;
2096 break;
2097 case 0x8: /* Caching page, direct access */
2098 len = resp_caching_pg(ap, pcontrol, target);
2099 offset += len;
2100 break;
2101 case 0xa: /* Control Mode page, all devices */
2102 len = resp_ctrl_m_pg(ap, pcontrol, target);
2103 offset += len;
2104 break;
c65b1445
DG		 2105 case 0x19: /* if spc==1 then sas phy, control+discover */
2106 if ((subpcode > 0x2) && (subpcode < 0xff)) {
22017ed2 2107 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
c65b1445
DG		 2108 return check_condition_result;
2109 }
2110 len = 0;
2111 if ((0x0 == subpcode) || (0xff == subpcode))
2112 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2113 if ((0x1 == subpcode) || (0xff == subpcode))
2114 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
2115 target_dev_id);
2116 if ((0x2 == subpcode) || (0xff == subpcode))
2117 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2118 offset += len;
2119 break;
1da177e4
LT		 2120 case 0x1c: /* Informational Exceptions Mode page, all devices */
2121 len = resp_iec_m_pg(ap, pcontrol, target);
2122 offset += len;
2123 break;
2124 case 0x3f: /* Read all Mode pages */
c65b1445
DG		 2125 if ((0 == subpcode) || (0xff == subpcode)) {
2126 len = resp_err_recov_pg(ap, pcontrol, target);
2127 len += resp_disconnect_pg(ap + len, pcontrol, target);
2128 len += resp_format_pg(ap + len, pcontrol, target);
2129 len += resp_caching_pg(ap + len, pcontrol, target);
2130 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
2131 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2132 if (0xff == subpcode) {
2133 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
2134 target, target_dev_id);
2135 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2136 }
2137 len += resp_iec_m_pg(ap + len, pcontrol, target);
2138 } else {
22017ed2 2139 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
c65b1445
DG		 2140 return check_condition_result;
2141 }
1da177e4
LT		 2142 offset += len;
2143 break;
2144 default:
22017ed2 2145 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
1da177e4
LT		 2146 return check_condition_result;
2147 }
2148 if (msense_6)
2149 arr[0] = offset - 1;
2150 else {
2151 arr[0] = ((offset - 2) >> 8) & 0xff;
2152 arr[1] = (offset - 2) & 0xff;
2153 }
2154 return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
2155}
2156
c65b1445
DG		 2157#define SDEBUG_MAX_MSELECT_SZ 512
2158
c2248fc9
DG		 2159static int
2160resp_mode_select(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
c65b1445
DG		 2161{
2162 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
c2248fc9 2163 int param_len, res, mpage;
c65b1445 2164 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
01123ef4 2165 unsigned char *cmd = scp->cmnd;
c2248fc9 2166 int mselect6 = (MODE_SELECT == cmd[0]);
c65b1445 2167
c65b1445
DG		 2168 memset(arr, 0, sizeof(arr));
2169 pf = cmd[1] & 0x10;
2170 sp = cmd[1] & 0x1;
2171 param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]);
2172 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
22017ed2 2173 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1);
c65b1445
DG		 2174 return check_condition_result;
2175 }
2176 res = fetch_to_dev_buffer(scp, arr, param_len);
2177 if (-1 == res)
2178 return (DID_ERROR << 16);
2179 else if ((res < param_len) &&
2180 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
cbf67842
DG		 2181 sdev_printk(KERN_INFO, scp->device,
2182 "%s: cdb indicated=%d, IO sent=%d bytes\n",
2183 __func__, param_len, res);
c65b1445
DG		 2184 md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2);
2185 bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]);
23183910 2186 if (md_len > 2) {
22017ed2 2187 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1);
c65b1445
DG		 2188 return check_condition_result;
2189 }
2190 off = bd_len + (mselect6 ? 4 : 8);
2191 mpage = arr[off] & 0x3f;
2192 ps = !!(arr[off] & 0x80);
2193 if (ps) {
22017ed2 2194 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7);
c65b1445
DG		 2195 return check_condition_result;
2196 }
2197 spf = !!(arr[off] & 0x40);
2198 pg_len = spf ? ((arr[off + 2] << 8) + arr[off + 3] + 4) :
2199 (arr[off + 1] + 2);
2200 if ((pg_len + off) > param_len) {
cbf67842 2201 mk_sense_buffer(scp, ILLEGAL_REQUEST,
c65b1445
DG		 2202 PARAMETER_LIST_LENGTH_ERR, 0);
2203 return check_condition_result;
2204 }
2205 switch (mpage) {
cbf67842
DG		 2206 case 0x8: /* Caching Mode page */
2207 if (caching_pg[1] == arr[off + 1]) {
2208 memcpy(caching_pg + 2, arr + off + 2,
2209 sizeof(caching_pg) - 2);
2210 goto set_mode_changed_ua;
2211 }
2212 break;
c65b1445
DG		 2213 case 0xa: /* Control Mode page */
2214 if (ctrl_m_pg[1] == arr[off + 1]) {
2215 memcpy(ctrl_m_pg + 2, arr + off + 2,
2216 sizeof(ctrl_m_pg) - 2);
2217 scsi_debug_dsense = !!(ctrl_m_pg[2] & 0x4);
cbf67842 2218 goto set_mode_changed_ua;
c65b1445
DG		 2219 }
2220 break;
2221 case 0x1c: /* Informational Exceptions Mode page */
2222 if (iec_m_pg[1] == arr[off + 1]) {
2223 memcpy(iec_m_pg + 2, arr + off + 2,
2224 sizeof(iec_m_pg) - 2);
cbf67842 2225 goto set_mode_changed_ua;
c65b1445
DG		 2226 }
2227 break;
2228 default:
2229 break;
2230 }
22017ed2 2231 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5);
c65b1445 2232 return check_condition_result;
cbf67842
DG		 2233set_mode_changed_ua:
2234 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
2235 return 0;
c65b1445
DG		 2236}
2237
2238static int resp_temp_l_pg(unsigned char * arr)
2239{
2240 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
2241 0x0, 0x1, 0x3, 0x2, 0x0, 65,
2242 };
2243
2244 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
2245 return sizeof(temp_l_pg);
2246}
2247
2248static int resp_ie_l_pg(unsigned char * arr)
2249{
2250 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
2251 };
2252
2253 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
2254 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
2255 arr[4] = THRESHOLD_EXCEEDED;
2256 arr[5] = 0xff;
2257 }
2258 return sizeof(ie_l_pg);
2259}
2260
2261#define SDEBUG_MAX_LSENSE_SZ 512
2262
2263static int resp_log_sense(struct scsi_cmnd * scp,
2264 struct sdebug_dev_info * devip)
2265{
c2248fc9 2266 int ppc, sp, pcontrol, pcode, subpcode, alloc_len, len, n;
c65b1445 2267 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
01123ef4 2268 unsigned char *cmd = scp->cmnd;
c65b1445 2269
c65b1445
DG		 2270 memset(arr, 0, sizeof(arr));
2271 ppc = cmd[1] & 0x2;
2272 sp = cmd[1] & 0x1;
2273 if (ppc || sp) {
22017ed2 2274 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0);
c65b1445
DG		 2275 return check_condition_result;
2276 }
2277 pcontrol = (cmd[2] & 0xc0) >> 6;
2278 pcode = cmd[2] & 0x3f;
23183910 2279 subpcode = cmd[3] & 0xff;
c65b1445
DG		 2280 alloc_len = (cmd[7] << 8) + cmd[8];
2281 arr[0] = pcode;
23183910
DG		 2282 if (0 == subpcode) {
2283 switch (pcode) {
2284 case 0x0: /* Supported log pages log page */
2285 n = 4;
2286 arr[n++] = 0x0; /* this page */
2287 arr[n++] = 0xd; /* Temperature */
2288 arr[n++] = 0x2f; /* Informational exceptions */
2289 arr[3] = n - 4;
2290 break;
2291 case 0xd: /* Temperature log page */
2292 arr[3] = resp_temp_l_pg(arr + 4);
2293 break;
2294 case 0x2f: /* Informational exceptions log page */
2295 arr[3] = resp_ie_l_pg(arr + 4);
2296 break;
2297 default:
22017ed2 2298 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
23183910
DG		 2299 return check_condition_result;
2300 }
2301 } else if (0xff == subpcode) {
2302 arr[0] |= 0x40;
2303 arr[1] = subpcode;
2304 switch (pcode) {
2305 case 0x0: /* Supported log pages and subpages log page */
2306 n = 4;
2307 arr[n++] = 0x0;
2308 arr[n++] = 0x0; /* 0,0 page */
2309 arr[n++] = 0x0;
2310 arr[n++] = 0xff; /* this page */
2311 arr[n++] = 0xd;
2312 arr[n++] = 0x0; /* Temperature */
2313 arr[n++] = 0x2f;
2314 arr[n++] = 0x0; /* Informational exceptions */
2315 arr[3] = n - 4;
2316 break;
2317 case 0xd: /* Temperature subpages */
2318 n = 4;
2319 arr[n++] = 0xd;
2320 arr[n++] = 0x0; /* Temperature */
2321 arr[3] = n - 4;
2322 break;
2323 case 0x2f: /* Informational exceptions subpages */
2324 n = 4;
2325 arr[n++] = 0x2f;
2326 arr[n++] = 0x0; /* Informational exceptions */
2327 arr[3] = n - 4;
2328 break;
2329 default:
22017ed2 2330 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
23183910
DG		 2331 return check_condition_result;
2332 }
2333 } else {
22017ed2 2334 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
c65b1445
DG		 2335 return check_condition_result;
2336 }
2337 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
2338 return fill_from_dev_buffer(scp, arr,
2339 min(len, SDEBUG_MAX_INQ_ARR_SZ));
2340}
2341
cbf67842 2342static int check_device_access_params(struct scsi_cmnd *scp,
19789100 2343 unsigned long long lba, unsigned int num)
1da177e4 2344{
c65b1445 2345 if (lba + num > sdebug_capacity) {
22017ed2 2346 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
1da177e4
LT		 2347 return check_condition_result;
2348 }
c65b1445
DG		 2349 /* transfer length excessive (tie in to block limits VPD page) */
2350 if (num > sdebug_store_sectors) {
22017ed2 2351 /* needs work to find which cdb byte 'num' comes from */
cbf67842 2352 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
c65b1445
DG		 2353 return check_condition_result;
2354 }
19789100
FT		 2355 return 0;
2356}
2357
a4517511 2358/* Returns number of bytes copied or -1 if error. */
c2248fc9
DG		 2359static int
2360do_device_access(struct scsi_cmnd *scmd, u64 lba, u32 num, bool do_write)
19789100
FT		 2361{
2362 int ret;
c2248fc9 2363 u64 block, rest = 0;
a4517511
AM		 2364 struct scsi_data_buffer *sdb;
2365 enum dma_data_direction dir;
2366 size_t (*func)(struct scatterlist *, unsigned int, void *, size_t,
2367 off_t);
2368
c2248fc9 2369 if (do_write) {
a4517511
AM		 2370 sdb = scsi_out(scmd);
2371 dir = DMA_TO_DEVICE;
2372 func = sg_pcopy_to_buffer;
2373 } else {
2374 sdb = scsi_in(scmd);
2375 dir = DMA_FROM_DEVICE;
2376 func = sg_pcopy_from_buffer;
2377 }
19789100 2378
a4517511
AM		 2379 if (!sdb->length)
2380 return 0;
2381 if (!(scsi_bidi_cmnd(scmd) || scmd->sc_data_direction == dir))
2382 return -1;
19789100
FT		 2383
2384 block = do_div(lba, sdebug_store_sectors);
2385 if (block + num > sdebug_store_sectors)
2386 rest = block + num - sdebug_store_sectors;
2387
a4517511
AM		 2388 ret = func(sdb->table.sgl, sdb->table.nents,
2389 fake_storep + (block * scsi_debug_sector_size),
2390 (num - rest) * scsi_debug_sector_size, 0);
2391 if (ret != (num - rest) * scsi_debug_sector_size)
2392 return ret;
2393
2394 if (rest) {
2395 ret += func(sdb->table.sgl, sdb->table.nents,
2396 fake_storep, rest * scsi_debug_sector_size,
2397 (num - rest) * scsi_debug_sector_size);
2398 }
19789100
FT		 2399
2400 return ret;
2401}
2402
38d5c833
DG		 2403/* If fake_store(lba,num) compares equal to arr(num), then copy top half of
2404 * arr into fake_store(lba,num) and return true. If comparison fails then
2405 * return false. */
2406static bool
2407comp_write_worker(u64 lba, u32 num, const u8 *arr)
2408{
2409 bool res;
2410 u64 block, rest = 0;
2411 u32 store_blks = sdebug_store_sectors;
2412 u32 lb_size = scsi_debug_sector_size;
2413
2414 block = do_div(lba, store_blks);
2415 if (block + num > store_blks)
2416 rest = block + num - store_blks;
2417
2418 res = !memcmp(fake_storep + (block * lb_size), arr,
2419 (num - rest) * lb_size);
2420 if (!res)
2421 return res;
2422 if (rest)
2423 res = memcmp(fake_storep, arr + ((num - rest) * lb_size),
2424 rest * lb_size);
2425 if (!res)
2426 return res;
2427 arr += num * lb_size;
2428 memcpy(fake_storep + (block * lb_size), arr, (num - rest) * lb_size);
2429 if (rest)
2430 memcpy(fake_storep, arr + ((num - rest) * lb_size),
2431 rest * lb_size);
2432 return res;
2433}
2434
51d648af 2435static __be16 dif_compute_csum(const void *buf, int len)
beb40ea4 2436{
51d648af 2437 __be16 csum;
beb40ea4 2438
51d648af
AM		 2439 if (scsi_debug_guard)
2440 csum = (__force __be16)ip_compute_csum(buf, len);
2441 else
beb40ea4 2442 csum = cpu_to_be16(crc_t10dif(buf, len));
51d648af 2443
beb40ea4
AM		 2444 return csum;
2445}
2446
2447static int dif_verify(struct sd_dif_tuple *sdt, const void *data,
2448 sector_t sector, u32 ei_lba)
2449{
51d648af 2450 __be16 csum = dif_compute_csum(data, scsi_debug_sector_size);
beb40ea4
AM		 2451
2452 if (sdt->guard_tag != csum) {
2453 pr_err("%s: GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
2454 __func__,
2455 (unsigned long)sector,
2456 be16_to_cpu(sdt->guard_tag),
2457 be16_to_cpu(csum));
2458 return 0x01;
2459 }
2460 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION &&
2461 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
2462 pr_err("%s: REF check failed on sector %lu\n",
2463 __func__, (unsigned long)sector);
2464 return 0x03;
2465 }
2466 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
2467 be32_to_cpu(sdt->ref_tag) != ei_lba) {
2468 pr_err("%s: REF check failed on sector %lu\n",
2469 __func__, (unsigned long)sector);
beb40ea4
AM		 2470 return 0x03;
2471 }
2472 return 0;
2473}
2474
bb8c063c 2475static void dif_copy_prot(struct scsi_cmnd *SCpnt, sector_t sector,
65f72f2a 2476 unsigned int sectors, bool read)
c6a44287 2477{
be4e11be 2478 size_t resid;
c6a44287 2479 void *paddr;
14faa944 2480 const void *dif_store_end = dif_storep + sdebug_store_sectors;
be4e11be 2481 struct sg_mapping_iter miter;
c6a44287 2482
e18d8bea
AM		 2483 /* Bytes of protection data to copy into sgl */
2484 resid = sectors * sizeof(*dif_storep);
c6a44287 2485
be4e11be
AM		 2486 sg_miter_start(&miter, scsi_prot_sglist(SCpnt),
2487 scsi_prot_sg_count(SCpnt), SG_MITER_ATOMIC |
2488 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
2489
2490 while (sg_miter_next(&miter) && resid > 0) {
2491 size_t len = min(miter.length, resid);
14faa944 2492 void *start = dif_store(sector);
be4e11be 2493 size_t rest = 0;
14faa944
AM		 2494
2495 if (dif_store_end < start + len)
2496 rest = start + len - dif_store_end;
c6a44287 2497
be4e11be 2498 paddr = miter.addr;
14faa944 2499
65f72f2a
AM		 2500 if (read)
2501 memcpy(paddr, start, len - rest);
2502 else
2503 memcpy(start, paddr, len - rest);
2504
2505 if (rest) {
2506 if (read)
2507 memcpy(paddr + len - rest, dif_storep, rest);
2508 else
2509 memcpy(dif_storep, paddr + len - rest, rest);
2510 }
c6a44287 2511
e18d8bea 2512 sector += len / sizeof(*dif_storep);
c6a44287 2513 resid -= len;
c6a44287 2514 }
be4e11be 2515 sg_miter_stop(&miter);
bb8c063c
AM		 2516}
2517
2518static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
2519 unsigned int sectors, u32 ei_lba)
2520{
2521 unsigned int i;
2522 struct sd_dif_tuple *sdt;
2523 sector_t sector;
2524
c45eabec 2525 for (i = 0; i < sectors; i++, ei_lba++) {
bb8c063c
AM		 2526 int ret;
2527
2528 sector = start_sec + i;
2529 sdt = dif_store(sector);
2530
51d648af 2531 if (sdt->app_tag == cpu_to_be16(0xffff))
bb8c063c
AM		 2532 continue;
2533
2534 ret = dif_verify(sdt, fake_store(sector), sector, ei_lba);
2535 if (ret) {
2536 dif_errors++;
2537 return ret;
2538 }
bb8c063c 2539 }
c6a44287 2540
65f72f2a 2541 dif_copy_prot(SCpnt, start_sec, sectors, true);
c6a44287
MP		 2542 dix_reads++;
2543
2544 return 0;
2545}
2546
c2248fc9
DG		 2547static int
2548resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
19789100 2549{
c2248fc9
DG		 2550 u8 *cmd = scp->cmnd;
2551 u64 lba;
2552 u32 num;
2553 u32 ei_lba;
19789100
FT		 2554 unsigned long iflags;
2555 int ret;
c2248fc9 2556 bool check_prot;
19789100 2557
c2248fc9
DG		 2558 switch (cmd[0]) {
2559 case READ_16:
2560 ei_lba = 0;
2561 lba = get_unaligned_be64(cmd + 2);
2562 num = get_unaligned_be32(cmd + 10);
2563 check_prot = true;
2564 break;
2565 case READ_10:
2566 ei_lba = 0;
2567 lba = get_unaligned_be32(cmd + 2);
2568 num = get_unaligned_be16(cmd + 7);
2569 check_prot = true;
2570 break;
2571 case READ_6:
2572 ei_lba = 0;
2573 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
2574 (u32)(cmd[1] & 0x1f) << 16;
2575 num = (0 == cmd[4]) ? 256 : cmd[4];
2576 check_prot = true;
2577 break;
2578 case READ_12:
2579 ei_lba = 0;
2580 lba = get_unaligned_be32(cmd + 2);
2581 num = get_unaligned_be32(cmd + 6);
2582 check_prot = true;
2583 break;
2584 case XDWRITEREAD_10:
2585 ei_lba = 0;
2586 lba = get_unaligned_be32(cmd + 2);
2587 num = get_unaligned_be16(cmd + 7);
2588 check_prot = false;
2589 break;
2590 default: /* assume READ(32) */
2591 lba = get_unaligned_be64(cmd + 12);
2592 ei_lba = get_unaligned_be32(cmd + 20);
2593 num = get_unaligned_be32(cmd + 28);
2594 check_prot = false;
2595 break;
2596 }
2597 if (check_prot) {
2598 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
2599 (cmd[1] & 0xe0)) {
2600 mk_sense_invalid_opcode(scp);
2601 return check_condition_result;
2602 }
2603 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
2604 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
2605 (cmd[1] & 0xe0) == 0)
2606 sdev_printk(KERN_ERR, scp->device, "Unprotected RD "
2607 "to DIF device\n");
2608 }
2609 if (sdebug_any_injecting_opt) {
2610 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
2611
2612 if (ep->inj_short)
2613 num /= 2;
2614 }
2615
2616 /* inline check_device_access_params() */
2617 if (lba + num > sdebug_capacity) {
2618 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2619 return check_condition_result;
2620 }
2621 /* transfer length excessive (tie in to block limits VPD page) */
2622 if (num > sdebug_store_sectors) {
2623 /* needs work to find which cdb byte 'num' comes from */
2624 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2625 return check_condition_result;
2626 }
19789100 2627
1da177e4 2628 if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) &&
32f7ef73 2629 (lba <= (OPT_MEDIUM_ERR_ADDR + OPT_MEDIUM_ERR_NUM - 1)) &&
c65b1445
DG		 2630 ((lba + num) > OPT_MEDIUM_ERR_ADDR)) {
2631 /* claim unrecoverable read error */
c2248fc9 2632 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
c65b1445 2633 /* set info field and valid bit for fixed descriptor */
c2248fc9
DG		 2634 if (0x70 == (scp->sense_buffer[0] & 0x7f)) {
2635 scp->sense_buffer[0] |= 0x80; /* Valid bit */
32f7ef73
DG		 2636 ret = (lba < OPT_MEDIUM_ERR_ADDR)
2637 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
c2248fc9 2638 put_unaligned_be32(ret, scp->sense_buffer + 3);
c65b1445 2639 }
c2248fc9 2640 scsi_set_resid(scp, scsi_bufflen(scp));
1da177e4
LT		 2641 return check_condition_result;
2642 }
c6a44287 2643
6c78cc06
AM		 2644 read_lock_irqsave(&atomic_rw, iflags);
2645
c6a44287 2646 /* DIX + T10 DIF */
c2248fc9
DG		 2647 if (scsi_debug_dix && scsi_prot_sg_count(scp)) {
2648 int prot_ret = prot_verify_read(scp, lba, num, ei_lba);
c6a44287
MP		 2649
2650 if (prot_ret) {
6c78cc06 2651 read_unlock_irqrestore(&atomic_rw, iflags);
c2248fc9 2652 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, prot_ret);
c6a44287
MP		 2653 return illegal_condition_result;
2654 }
2655 }
2656
c2248fc9 2657 ret = do_device_access(scp, lba, num, false);
1da177e4 2658 read_unlock_irqrestore(&atomic_rw, iflags);
a4517511
AM		 2659 if (ret == -1)
2660 return DID_ERROR << 16;
2661
c2248fc9 2662 scsi_in(scp)->resid = scsi_bufflen(scp) - ret;
a4517511 2663
c2248fc9
DG		 2664 if (sdebug_any_injecting_opt) {
2665 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
2666
2667 if (ep->inj_recovered) {
2668 mk_sense_buffer(scp, RECOVERED_ERROR,
2669 THRESHOLD_EXCEEDED, 0);
2670 return check_condition_result;
2671 } else if (ep->inj_transport) {
2672 mk_sense_buffer(scp, ABORTED_COMMAND,
2673 TRANSPORT_PROBLEM, ACK_NAK_TO);
2674 return check_condition_result;
2675 } else if (ep->inj_dif) {
2676 /* Logical block guard check failed */
2677 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
2678 return illegal_condition_result;
2679 } else if (ep->inj_dix) {
2680 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
2681 return illegal_condition_result;
2682 }
2683 }
a4517511 2684 return 0;
1da177e4
LT		 2685}
2686
c6a44287
MP		 2687void dump_sector(unsigned char *buf, int len)
2688{
cbf67842 2689 int i, j, n;
c6a44287 2690
cbf67842 2691 pr_err(">>> Sector Dump <<<\n");
c6a44287 2692 for (i = 0 ; i < len ; i += 16) {
cbf67842 2693 char b[128];
c6a44287 2694
cbf67842 2695 for (j = 0, n = 0; j < 16; j++) {
c6a44287 2696 unsigned char c = buf[i+j];
cbf67842 2697
c6a44287 2698 if (c >= 0x20 && c < 0x7e)
cbf67842
DG		 2699 n += scnprintf(b + n, sizeof(b) - n,
2700 " %c ", buf[i+j]);
c6a44287 2701 else
cbf67842
DG		 2702 n += scnprintf(b + n, sizeof(b) - n,
2703 "%02x ", buf[i+j]);
c6a44287 2704 }
cbf67842 2705 pr_err("%04d: %s\n", i, b);
c6a44287
MP		 2706 }
2707}
2708
2709static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
395cef03 2710 unsigned int sectors, u32 ei_lba)
c6a44287 2711{
be4e11be 2712 int ret;
c6a44287 2713 struct sd_dif_tuple *sdt;
be4e11be 2714 void *daddr;
65f72f2a 2715 sector_t sector = start_sec;
c6a44287 2716 int ppage_offset;
be4e11be
AM		 2717 int dpage_offset;
2718 struct sg_mapping_iter diter;
2719 struct sg_mapping_iter piter;
c6a44287 2720
c6a44287
MP		 2721 BUG_ON(scsi_sg_count(SCpnt) == 0);
2722 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
2723
be4e11be
AM		 2724 sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
2725 scsi_prot_sg_count(SCpnt),
2726 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
2727 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
2728 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
2729
2730 /* For each protection page */
2731 while (sg_miter_next(&piter)) {
2732 dpage_offset = 0;
2733 if (WARN_ON(!sg_miter_next(&diter))) {
2734 ret = 0x01;
2735 goto out;
2736 }
c6a44287 2737
be4e11be
AM		 2738 for (ppage_offset = 0; ppage_offset < piter.length;
2739 ppage_offset += sizeof(struct sd_dif_tuple)) {
c6a44287 2740 /* If we're at the end of the current
be4e11be 2741 * data page advance to the next one
c6a44287 2742 */
be4e11be
AM		 2743 if (dpage_offset >= diter.length) {
2744 if (WARN_ON(!sg_miter_next(&diter))) {
2745 ret = 0x01;
2746 goto out;
2747 }
2748 dpage_offset = 0;
c6a44287
MP		 2749 }
2750
be4e11be
AM		 2751 sdt = piter.addr + ppage_offset;
2752 daddr = diter.addr + dpage_offset;
c6a44287 2753
be4e11be 2754 ret = dif_verify(sdt, daddr, sector, ei_lba);
beb40ea4 2755 if (ret) {
be4e11be 2756 dump_sector(daddr, scsi_debug_sector_size);
395cef03
MP		 2757 goto out;
2758 }
2759
c6a44287 2760 sector++;
395cef03 2761 ei_lba++;
be4e11be 2762 dpage_offset += scsi_debug_sector_size;
c6a44287 2763 }
be4e11be
AM		 2764 diter.consumed = dpage_offset;
2765 sg_miter_stop(&diter);
c6a44287 2766 }
be4e11be 2767 sg_miter_stop(&piter);
c6a44287 2768
65f72f2a 2769 dif_copy_prot(SCpnt, start_sec, sectors, false);
c6a44287
MP		 2770 dix_writes++;
2771
2772 return 0;
2773
2774out:
2775 dif_errors++;
be4e11be
AM		 2776 sg_miter_stop(&diter);
2777 sg_miter_stop(&piter);
c6a44287
MP		 2778 return ret;
2779}
2780
b90ebc3d
AM		 2781static unsigned long lba_to_map_index(sector_t lba)
2782{
2783 if (scsi_debug_unmap_alignment) {
2784 lba += scsi_debug_unmap_granularity -
2785 scsi_debug_unmap_alignment;
2786 }
2787 do_div(lba, scsi_debug_unmap_granularity);
2788
2789 return lba;
2790}
2791
2792static sector_t map_index_to_lba(unsigned long index)
44d92694 2793{
a027b5b9
AM		 2794 sector_t lba = index * scsi_debug_unmap_granularity;
2795
2796 if (scsi_debug_unmap_alignment) {
2797 lba -= scsi_debug_unmap_granularity -
2798 scsi_debug_unmap_alignment;
2799 }
2800
2801 return lba;
b90ebc3d 2802}
44d92694 2803
b90ebc3d
AM		 2804static unsigned int map_state(sector_t lba, unsigned int *num)
2805{
2806 sector_t end;
2807 unsigned int mapped;
2808 unsigned long index;
2809 unsigned long next;
44d92694 2810
b90ebc3d
AM		 2811 index = lba_to_map_index(lba);
2812 mapped = test_bit(index, map_storep);
44d92694
MP		 2813
2814 if (mapped)
b90ebc3d 2815 next = find_next_zero_bit(map_storep, map_size, index);
44d92694 2816 else
b90ebc3d 2817 next = find_next_bit(map_storep, map_size, index);
44d92694 2818
b90ebc3d 2819 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
44d92694
MP		 2820 *num = end - lba;
2821
2822 return mapped;
2823}
2824
2825static void map_region(sector_t lba, unsigned int len)
2826{
44d92694
MP		 2827 sector_t end = lba + len;
2828
44d92694 2829 while (lba < end) {
b90ebc3d 2830 unsigned long index = lba_to_map_index(lba);
44d92694 2831
b90ebc3d
AM		 2832 if (index < map_size)
2833 set_bit(index, map_storep);
44d92694 2834
b90ebc3d 2835 lba = map_index_to_lba(index + 1);
44d92694
MP		 2836 }
2837}
2838
2839static void unmap_region(sector_t lba, unsigned int len)
2840{
44d92694
MP		 2841 sector_t end = lba + len;
2842
44d92694 2843 while (lba < end) {
b90ebc3d 2844 unsigned long index = lba_to_map_index(lba);
44d92694 2845
b90ebc3d
AM		 2846 if (lba == map_index_to_lba(index) &&
2847 lba + scsi_debug_unmap_granularity <= end &&
2848 index < map_size) {
2849 clear_bit(index, map_storep);
2850 if (scsi_debug_lbprz) {
be1dd78d 2851 memset(fake_storep +
cc34a8e6
AM		 2852 lba * scsi_debug_sector_size, 0,
2853 scsi_debug_sector_size *
2854 scsi_debug_unmap_granularity);
b90ebc3d 2855 }
e9926b43
AM		 2856 if (dif_storep) {
2857 memset(dif_storep + lba, 0xff,
2858 sizeof(*dif_storep) *
2859 scsi_debug_unmap_granularity);
2860 }
be1dd78d 2861 }
b90ebc3d 2862 lba = map_index_to_lba(index + 1);
44d92694
MP		 2863 }
2864}
2865
c2248fc9
DG		 2866static int
2867resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1da177e4 2868{
c2248fc9
DG		 2869 u8 *cmd = scp->cmnd;
2870 u64 lba;
2871 u32 num;
2872 u32 ei_lba;
1da177e4 2873 unsigned long iflags;
19789100 2874 int ret;
c2248fc9 2875 bool check_prot;
1da177e4 2876
c2248fc9
DG		 2877 switch (cmd[0]) {
2878 case WRITE_16:
2879 ei_lba = 0;
2880 lba = get_unaligned_be64(cmd + 2);
2881 num = get_unaligned_be32(cmd + 10);
2882 check_prot = true;
2883 break;
2884 case WRITE_10:
2885 ei_lba = 0;
2886 lba = get_unaligned_be32(cmd + 2);
2887 num = get_unaligned_be16(cmd + 7);
2888 check_prot = true;
2889 break;
2890 case WRITE_6:
2891 ei_lba = 0;
2892 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
2893 (u32)(cmd[1] & 0x1f) << 16;
2894 num = (0 == cmd[4]) ? 256 : cmd[4];
2895 check_prot = true;
2896 break;
2897 case WRITE_12:
2898 ei_lba = 0;
2899 lba = get_unaligned_be32(cmd + 2);
2900 num = get_unaligned_be32(cmd + 6);
2901 check_prot = true;
2902 break;
2903 case 0x53: /* XDWRITEREAD(10) */
2904 ei_lba = 0;
2905 lba = get_unaligned_be32(cmd + 2);
2906 num = get_unaligned_be16(cmd + 7);
2907 check_prot = false;
2908 break;
2909 default: /* assume WRITE(32) */
2910 lba = get_unaligned_be64(cmd + 12);
2911 ei_lba = get_unaligned_be32(cmd + 20);
2912 num = get_unaligned_be32(cmd + 28);
2913 check_prot = false;
2914 break;
2915 }
2916 if (check_prot) {
2917 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
2918 (cmd[1] & 0xe0)) {
2919 mk_sense_invalid_opcode(scp);
2920 return check_condition_result;
2921 }
2922 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
2923 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
2924 (cmd[1] & 0xe0) == 0)
2925 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
2926 "to DIF device\n");
2927 }
2928
2929 /* inline check_device_access_params() */
2930 if (lba + num > sdebug_capacity) {
2931 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2932 return check_condition_result;
2933 }
2934 /* transfer length excessive (tie in to block limits VPD page) */
2935 if (num > sdebug_store_sectors) {
2936 /* needs work to find which cdb byte 'num' comes from */
2937 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2938 return check_condition_result;
2939 }
1da177e4 2940
6c78cc06
AM		 2941 write_lock_irqsave(&atomic_rw, iflags);
2942
c6a44287 2943 /* DIX + T10 DIF */
c2248fc9
DG		 2944 if (scsi_debug_dix && scsi_prot_sg_count(scp)) {
2945 int prot_ret = prot_verify_write(scp, lba, num, ei_lba);
c6a44287
MP		 2946
2947 if (prot_ret) {
6c78cc06 2948 write_unlock_irqrestore(&atomic_rw, iflags);
c2248fc9 2949 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, prot_ret);
c6a44287
MP		 2950 return illegal_condition_result;
2951 }
2952 }
2953
c2248fc9 2954 ret = do_device_access(scp, lba, num, true);
9ed8d3dc 2955 if (scsi_debug_lbp())
44d92694 2956 map_region(lba, num);
1da177e4 2957 write_unlock_irqrestore(&atomic_rw, iflags);
19789100 2958 if (-1 == ret)
1da177e4 2959 return (DID_ERROR << 16);
597136ab 2960 else if ((ret < (num * scsi_debug_sector_size)) &&
1da177e4 2961 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
c2248fc9 2962 sdev_printk(KERN_INFO, scp->device,
cbf67842
DG		 2963 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
2964 my_name, num * scsi_debug_sector_size, ret);
44d92694 2965
c2248fc9
DG		 2966 if (sdebug_any_injecting_opt) {
2967 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
2968
2969 if (ep->inj_recovered) {
2970 mk_sense_buffer(scp, RECOVERED_ERROR,
2971 THRESHOLD_EXCEEDED, 0);
2972 return check_condition_result;
2973 } else if (ep->inj_dif) {
2974 /* Logical block guard check failed */
2975 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
2976 return illegal_condition_result;
2977 } else if (ep->inj_dix) {
2978 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
2979 return illegal_condition_result;
2980 }
2981 }
44d92694
MP		 2982 return 0;
2983}
2984
c2248fc9
DG		 2985static int
2986resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num, u32 ei_lba,
2987 bool unmap, bool ndob)
44d92694
MP		 2988{
2989 unsigned long iflags;
2990 unsigned long long i;
2991 int ret;
2992
c2248fc9 2993 ret = check_device_access_params(scp, lba, num);
44d92694
MP		 2994 if (ret)
2995 return ret;
2996
2997 write_lock_irqsave(&atomic_rw, iflags);
2998
9ed8d3dc 2999 if (unmap && scsi_debug_lbp()) {
44d92694
MP		 3000 unmap_region(lba, num);
3001 goto out;
3002 }
3003
c2248fc9
DG		 3004 /* if ndob then zero 1 logical block, else fetch 1 logical block */
3005 if (ndob) {
3006 memset(fake_storep + (lba * scsi_debug_sector_size), 0,
3007 scsi_debug_sector_size);
3008 ret = 0;
3009 } else
3010 ret = fetch_to_dev_buffer(scp, fake_storep +
3011 (lba * scsi_debug_sector_size),
3012 scsi_debug_sector_size);
44d92694
MP		 3013
3014 if (-1 == ret) {
3015 write_unlock_irqrestore(&atomic_rw, iflags);
3016 return (DID_ERROR << 16);
3017 } else if ((ret < (num * scsi_debug_sector_size)) &&
3018 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
c2248fc9 3019 sdev_printk(KERN_INFO, scp->device,
cbf67842
DG		 3020 "%s: %s: cdb indicated=%u, IO sent=%d bytes\n",
3021 my_name, "write same",
3022 num * scsi_debug_sector_size, ret);
44d92694
MP		 3023
3024 /* Copy first sector to remaining blocks */
3025 for (i = 1 ; i < num ; i++)
3026 memcpy(fake_storep + ((lba + i) * scsi_debug_sector_size),
3027 fake_storep + (lba * scsi_debug_sector_size),
3028 scsi_debug_sector_size);
3029
9ed8d3dc 3030 if (scsi_debug_lbp())
44d92694
MP		 3031 map_region(lba, num);
3032out:
3033 write_unlock_irqrestore(&atomic_rw, iflags);
3034
1da177e4
LT		 3035 return 0;
3036}
3037
c2248fc9
DG		 3038static int
3039resp_write_same_10(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3040{
3041 u8 *cmd = scp->cmnd;
3042 u32 lba;
3043 u16 num;
3044 u32 ei_lba = 0;
3045 bool unmap = false;
3046
3047 if (cmd[1] & 0x8) {
3048 if (scsi_debug_lbpws10 == 0) {
3049 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3050 return check_condition_result;
3051 } else
3052 unmap = true;
3053 }
3054 lba = get_unaligned_be32(cmd + 2);
3055 num = get_unaligned_be16(cmd + 7);
3056 if (num > scsi_debug_write_same_length) {
3057 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3058 return check_condition_result;
3059 }
3060 return resp_write_same(scp, lba, num, ei_lba, unmap, false);
3061}
3062
3063static int
3064resp_write_same_16(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3065{
3066 u8 *cmd = scp->cmnd;
3067 u64 lba;
3068 u32 num;
3069 u32 ei_lba = 0;
3070 bool unmap = false;
3071 bool ndob = false;
3072
3073 if (cmd[1] & 0x8) { /* UNMAP */
3074 if (scsi_debug_lbpws == 0) {
3075 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3076 return check_condition_result;
3077 } else
3078 unmap = true;
3079 }
3080 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */
3081 ndob = true;
3082 lba = get_unaligned_be64(cmd + 2);
3083 num = get_unaligned_be32(cmd + 10);
3084 if (num > scsi_debug_write_same_length) {
3085 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
3086 return check_condition_result;
3087 }
3088 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob);
3089}
3090
acafd0b9
EM		 3091/* Note the mode field is in the same position as the (lower) service action
3092 * field. For the Report supported operation codes command, SPC-4 suggests
3093 * each mode of this command should be reported separately; for future. */
3094static int
3095resp_write_buffer(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3096{
3097 u8 *cmd = scp->cmnd;
3098 struct scsi_device *sdp = scp->device;
3099 struct sdebug_dev_info *dp;
3100 u8 mode;
3101
3102 mode = cmd[1] & 0x1f;
3103 switch (mode) {
3104 case 0x4: /* download microcode (MC) and activate (ACT) */
3105 /* set UAs on this device only */
3106 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3107 set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm);
3108 break;
3109 case 0x5: /* download MC, save and ACT */
3110 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm);
3111 break;
3112 case 0x6: /* download MC with offsets and ACT */
3113 /* set UAs on most devices (LUs) in this target */
3114 list_for_each_entry(dp,
3115 &devip->sdbg_host->dev_info_list,
3116 dev_list)
3117 if (dp->target == sdp->id) {
3118 set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm);
3119 if (devip != dp)
3120 set_bit(SDEBUG_UA_MICROCODE_CHANGED,
3121 dp->uas_bm);
3122 }
3123 break;
3124 case 0x7: /* download MC with offsets, save, and ACT */
3125 /* set UA on all devices (LUs) in this target */
3126 list_for_each_entry(dp,
3127 &devip->sdbg_host->dev_info_list,
3128 dev_list)
3129 if (dp->target == sdp->id)
3130 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET,
3131 dp->uas_bm);
3132 break;
3133 default:
3134 /* do nothing for this command for other mode values */
3135 break;
3136 }
3137 return 0;
3138}
3139
38d5c833
DG		 3140static int
3141resp_comp_write(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3142{
3143 u8 *cmd = scp->cmnd;
3144 u8 *arr;
3145 u8 *fake_storep_hold;
3146 u64 lba;
3147 u32 dnum;
3148 u32 lb_size = scsi_debug_sector_size;
3149 u8 num;
3150 unsigned long iflags;
3151 int ret;
d467d31f 3152 int retval = 0;
38d5c833 3153
d467d31f 3154 lba = get_unaligned_be64(cmd + 2);
38d5c833
DG		 3155 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */
3156 if (0 == num)
3157 return 0; /* degenerate case, not an error */
38d5c833
DG		 3158 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
3159 (cmd[1] & 0xe0)) {
3160 mk_sense_invalid_opcode(scp);
3161 return check_condition_result;
3162 }
3163 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
3164 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
3165 (cmd[1] & 0xe0) == 0)
3166 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3167 "to DIF device\n");
3168
3169 /* inline check_device_access_params() */
3170 if (lba + num > sdebug_capacity) {
3171 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
3172 return check_condition_result;
3173 }
3174 /* transfer length excessive (tie in to block limits VPD page) */
3175 if (num > sdebug_store_sectors) {
3176 /* needs work to find which cdb byte 'num' comes from */
3177 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3178 return check_condition_result;
3179 }
d467d31f
DG		 3180 dnum = 2 * num;
3181 arr = kzalloc(dnum * lb_size, GFP_ATOMIC);
3182 if (NULL == arr) {
3183 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3184 INSUFF_RES_ASCQ);
3185 return check_condition_result;
3186 }
38d5c833
DG		 3187
3188 write_lock_irqsave(&atomic_rw, iflags);
3189
3190 /* trick do_device_access() to fetch both compare and write buffers
3191 * from data-in into arr. Safe (atomic) since write_lock held. */
3192 fake_storep_hold = fake_storep;
3193 fake_storep = arr;
3194 ret = do_device_access(scp, 0, dnum, true);
3195 fake_storep = fake_storep_hold;
3196 if (ret == -1) {
d467d31f
DG		 3197 retval = DID_ERROR << 16;
3198 goto cleanup;
38d5c833
DG		 3199 } else if ((ret < (dnum * lb_size)) &&
3200 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
3201 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb "
3202 "indicated=%u, IO sent=%d bytes\n", my_name,
3203 dnum * lb_size, ret);
3204 if (!comp_write_worker(lba, num, arr)) {
38d5c833 3205 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
d467d31f
DG		 3206 retval = check_condition_result;
3207 goto cleanup;
38d5c833
DG		 3208 }
3209 if (scsi_debug_lbp())
3210 map_region(lba, num);
d467d31f 3211cleanup:
38d5c833 3212 write_unlock_irqrestore(&atomic_rw, iflags);
d467d31f
DG		 3213 kfree(arr);
3214 return retval;
38d5c833
DG		 3215}
3216
44d92694
MP		 3217struct unmap_block_desc {
3218 __be64 lba;
3219 __be32 blocks;
3220 __be32 __reserved;
3221};
3222
c2248fc9
DG		 3223static int
3224resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
44d92694
MP		 3225{
3226 unsigned char *buf;
3227 struct unmap_block_desc *desc;
3228 unsigned int i, payload_len, descriptors;
3229 int ret;
6c78cc06 3230 unsigned long iflags;
44d92694 3231
44d92694 3232
c2248fc9
DG		 3233 if (!scsi_debug_lbp())
3234 return 0; /* fib and say its done */
3235 payload_len = get_unaligned_be16(scp->cmnd + 7);
3236 BUG_ON(scsi_bufflen(scp) != payload_len);
44d92694
MP		 3237
3238 descriptors = (payload_len - 8) / 16;
c2248fc9
DG		 3239 if (descriptors > scsi_debug_unmap_max_desc) {
3240 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3241 return check_condition_result;
3242 }
44d92694 3243
c2248fc9
DG		 3244 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
3245 if (!buf) {
3246 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3247 INSUFF_RES_ASCQ);
44d92694 3248 return check_condition_result;
c2248fc9 3249 }
44d92694 3250
c2248fc9 3251 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
44d92694
MP		 3252
3253 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
3254 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
3255
3256 desc = (void *)&buf[8];
3257
6c78cc06
AM		 3258 write_lock_irqsave(&atomic_rw, iflags);
3259
44d92694
MP		 3260 for (i = 0 ; i < descriptors ; i++) {
3261 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
3262 unsigned int num = get_unaligned_be32(&desc[i].blocks);
3263
c2248fc9 3264 ret = check_device_access_params(scp, lba, num);
44d92694
MP		 3265 if (ret)
3266 goto out;
3267
3268 unmap_region(lba, num);
3269 }
3270
3271 ret = 0;
3272
3273out:
6c78cc06 3274 write_unlock_irqrestore(&atomic_rw, iflags);
44d92694
MP		 3275 kfree(buf);
3276
3277 return ret;
3278}
3279
3280#define SDEBUG_GET_LBA_STATUS_LEN 32
3281
c2248fc9
DG		 3282static int
3283resp_get_lba_status(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
44d92694 3284{
c2248fc9
DG		 3285 u8 *cmd = scp->cmnd;
3286 u64 lba;
3287 u32 alloc_len, mapped, num;
3288 u8 arr[SDEBUG_GET_LBA_STATUS_LEN];
44d92694
MP		 3289 int ret;
3290
c2248fc9
DG		 3291 lba = get_unaligned_be64(cmd + 2);
3292 alloc_len = get_unaligned_be32(cmd + 10);
44d92694
MP		 3293
3294 if (alloc_len < 24)
3295 return 0;
3296
c2248fc9 3297 ret = check_device_access_params(scp, lba, 1);
44d92694
MP		 3298 if (ret)
3299 return ret;
3300
c2248fc9
DG		 3301 if (scsi_debug_lbp())
3302 mapped = map_state(lba, &num);
3303 else {
3304 mapped = 1;
3305 /* following just in case virtual_gb changed */
3306 sdebug_capacity = get_sdebug_capacity();
3307 if (sdebug_capacity - lba <= 0xffffffff)
3308 num = sdebug_capacity - lba;
3309 else
3310 num = 0xffffffff;
3311 }
44d92694
MP		 3312
3313 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
c2248fc9
DG		 3314 put_unaligned_be32(20, arr); /* Parameter Data Length */
3315 put_unaligned_be64(lba, arr + 8); /* LBA */
3316 put_unaligned_be32(num, arr + 16); /* Number of blocks */
3317 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */
44d92694 3318
c2248fc9 3319 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN);
44d92694
MP		 3320}
3321
c65b1445 3322#define SDEBUG_RLUN_ARR_SZ 256
1da177e4
LT		 3323
3324static int resp_report_luns(struct scsi_cmnd * scp,
3325 struct sdebug_dev_info * devip)
3326{
3327 unsigned int alloc_len;
22017ed2
DG		 3328 int lun_cnt, i, upper, num, n, want_wlun, shortish;
3329 u64 lun;
01123ef4 3330 unsigned char *cmd = scp->cmnd;
1da177e4
LT		 3331 int select_report = (int)cmd[2];
3332 struct scsi_lun *one_lun;
3333 unsigned char arr[SDEBUG_RLUN_ARR_SZ];
c65b1445 3334 unsigned char * max_addr;
1da177e4 3335
19c8ead7 3336 clear_luns_changed_on_target(devip);
1da177e4 3337 alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
22017ed2
DG		 3338 shortish = (alloc_len < 4);
3339 if (shortish || (select_report > 2)) {
3340 mk_sense_invalid_fld(scp, SDEB_IN_CDB, shortish ? 6 : 2, -1);
1da177e4
LT		 3341 return check_condition_result;
3342 }
3343 /* can produce response with up to 16k luns (lun 0 to lun 16383) */
3344 memset(arr, 0, SDEBUG_RLUN_ARR_SZ);
3345 lun_cnt = scsi_debug_max_luns;
c65b1445
DG		 3346 if (1 == select_report)
3347 lun_cnt = 0;
3348 else if (scsi_debug_no_lun_0 && (lun_cnt > 0))
3349 --lun_cnt;
22017ed2
DG		 3350 want_wlun = (select_report > 0) ? 1 : 0;
3351 num = lun_cnt + want_wlun;
c65b1445
DG		 3352 arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff;
3353 arr[3] = (sizeof(struct scsi_lun) * num) & 0xff;
3354 n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) /
3355 sizeof(struct scsi_lun)), num);
3356 if (n < num) {
22017ed2 3357 want_wlun = 0;
c65b1445
DG		 3358 lun_cnt = n;
3359 }
1da177e4 3360 one_lun = (struct scsi_lun *) &arr[8];
c65b1445
DG		 3361 max_addr = arr + SDEBUG_RLUN_ARR_SZ;
3362 for (i = 0, lun = (scsi_debug_no_lun_0 ? 1 : 0);
3363 ((i < lun_cnt) && ((unsigned char *)(one_lun + i) < max_addr));
3364 i++, lun++) {
3365 upper = (lun >> 8) & 0x3f;
1da177e4
LT		 3366 if (upper)
3367 one_lun[i].scsi_lun[0] =
3368 (upper | (SAM2_LUN_ADDRESS_METHOD << 6));
c65b1445
DG		 3369 one_lun[i].scsi_lun[1] = lun & 0xff;
3370 }
22017ed2 3371 if (want_wlun) {
c65b1445
DG		 3372 one_lun[i].scsi_lun[0] = (SAM2_WLUN_REPORT_LUNS >> 8) & 0xff;
3373 one_lun[i].scsi_lun[1] = SAM2_WLUN_REPORT_LUNS & 0xff;
3374 i++;
1da177e4 3375 }
c65b1445 3376 alloc_len = (unsigned char *)(one_lun + i) - arr;
1da177e4
LT		 3377 return fill_from_dev_buffer(scp, arr,
3378 min((int)alloc_len, SDEBUG_RLUN_ARR_SZ));
3379}
3380
c639d14e
FT		 3381static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
3382 unsigned int num, struct sdebug_dev_info *devip)
3383{
be4e11be 3384 int j;
c639d14e
FT		 3385 unsigned char *kaddr, *buf;
3386 unsigned int offset;
c639d14e 3387 struct scsi_data_buffer *sdb = scsi_in(scp);
be4e11be 3388 struct sg_mapping_iter miter;
c639d14e
FT		 3389
3390 /* better not to use temporary buffer. */
3391 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
c5af0db9 3392 if (!buf) {
22017ed2
DG		 3393 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3394 INSUFF_RES_ASCQ);
c5af0db9
AM		 3395 return check_condition_result;
3396 }
c639d14e 3397
21a61829 3398 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
c639d14e
FT		 3399
3400 offset = 0;
be4e11be
AM		 3401 sg_miter_start(&miter, sdb->table.sgl, sdb->table.nents,
3402 SG_MITER_ATOMIC | SG_MITER_TO_SG);
c639d14e 3403
be4e11be
AM		 3404 while (sg_miter_next(&miter)) {
3405 kaddr = miter.addr;
3406 for (j = 0; j < miter.length; j++)
3407 *(kaddr + j) ^= *(buf + offset + j);
c639d14e 3408
be4e11be 3409 offset += miter.length;
c639d14e 3410 }
be4e11be 3411 sg_miter_stop(&miter);
c639d14e
FT		 3412 kfree(buf);
3413
be4e11be 3414 return 0;
c639d14e
FT		 3415}
3416
c2248fc9
DG		 3417static int
3418resp_xdwriteread_10(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3419{
3420 u8 *cmd = scp->cmnd;
3421 u64 lba;
3422 u32 num;
3423 int errsts;
3424
3425 if (!scsi_bidi_cmnd(scp)) {
3426 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3427 INSUFF_RES_ASCQ);
3428 return check_condition_result;
3429 }
3430 errsts = resp_read_dt0(scp, devip);
3431 if (errsts)
3432 return errsts;
3433 if (!(cmd[1] & 0x4)) { /* DISABLE_WRITE is not set */
3434 errsts = resp_write_dt0(scp, devip);
3435 if (errsts)
3436 return errsts;
3437 }
3438 lba = get_unaligned_be32(cmd + 2);
3439 num = get_unaligned_be16(cmd + 7);
3440 return resp_xdwriteread(scp, lba, num, devip);
3441}
3442
cbf67842
DG		 3443/* When timer or tasklet goes off this function is called. */
3444static void sdebug_q_cmd_complete(unsigned long indx)
1da177e4 3445{
cbf67842
DG		 3446 int qa_indx;
3447 int retiring = 0;
1da177e4 3448 unsigned long iflags;
cbf67842
DG		 3449 struct sdebug_queued_cmd *sqcp;
3450 struct scsi_cmnd *scp;
3451 struct sdebug_dev_info *devip;
1da177e4 3452
cbf67842
DG		 3453 atomic_inc(&sdebug_completions);
3454 qa_indx = indx;
3455 if ((qa_indx < 0) || (qa_indx >= SCSI_DEBUG_CANQUEUE)) {
3456 pr_err("%s: wild qa_indx=%d\n", __func__, qa_indx);
1da177e4
LT		 3457 return;
3458 }
3459 spin_lock_irqsave(&queued_arr_lock, iflags);
cbf67842
DG		 3460 sqcp = &queued_arr[qa_indx];
3461 scp = sqcp->a_cmnd;
3462 if (NULL == scp) {
3463 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3464 pr_err("%s: scp is NULL\n", __func__);
3465 return;
3466 }
3467 devip = (struct sdebug_dev_info *)scp->device->hostdata;
3468 if (devip)
3469 atomic_dec(&devip->num_in_q);
3470 else
3471 pr_err("%s: devip=NULL\n", __func__);
3472 if (atomic_read(&retired_max_queue) > 0)
3473 retiring = 1;
3474
3475 sqcp->a_cmnd = NULL;
3476 if (!test_and_clear_bit(qa_indx, queued_in_use_bm)) {
1da177e4 3477 spin_unlock_irqrestore(&queued_arr_lock, iflags);
cbf67842 3478 pr_err("%s: Unexpected completion\n", __func__);
1da177e4
LT		 3479 return;
3480 }
cbf67842
DG		 3481
3482 if (unlikely(retiring)) { /* user has reduced max_queue */
3483 int k, retval;
3484
3485 retval = atomic_read(&retired_max_queue);
3486 if (qa_indx >= retval) {
3487 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3488 pr_err("%s: index %d too large\n", __func__, retval);
3489 return;
3490 }
3491 k = find_last_bit(queued_in_use_bm, retval);
3492 if ((k < scsi_debug_max_queue) || (k == retval))
3493 atomic_set(&retired_max_queue, 0);
3494 else
3495 atomic_set(&retired_max_queue, k + 1);
1da177e4 3496 }
1da177e4 3497 spin_unlock_irqrestore(&queued_arr_lock, iflags);
cbf67842 3498 scp->scsi_done(scp); /* callback to mid level */
1da177e4
LT		 3499}
3500
cbf67842
DG		 3501/* When high resolution timer goes off this function is called. */
3502static enum hrtimer_restart
3503sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
3504{
3505 int qa_indx;
3506 int retiring = 0;
3507 unsigned long iflags;
3508 struct sdebug_hrtimer *sd_hrtp = (struct sdebug_hrtimer *)timer;
3509 struct sdebug_queued_cmd *sqcp;
3510 struct scsi_cmnd *scp;
3511 struct sdebug_dev_info *devip;
3512
3513 atomic_inc(&sdebug_completions);
3514 qa_indx = sd_hrtp->qa_indx;
3515 if ((qa_indx < 0) || (qa_indx >= SCSI_DEBUG_CANQUEUE)) {
3516 pr_err("%s: wild qa_indx=%d\n", __func__, qa_indx);
3517 goto the_end;
3518 }
3519 spin_lock_irqsave(&queued_arr_lock, iflags);
3520 sqcp = &queued_arr[qa_indx];
3521 scp = sqcp->a_cmnd;
3522 if (NULL == scp) {
3523 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3524 pr_err("%s: scp is NULL\n", __func__);
3525 goto the_end;
3526 }
3527 devip = (struct sdebug_dev_info *)scp->device->hostdata;
3528 if (devip)
3529 atomic_dec(&devip->num_in_q);
3530 else
3531 pr_err("%s: devip=NULL\n", __func__);
3532 if (atomic_read(&retired_max_queue) > 0)
3533 retiring = 1;
3534
3535 sqcp->a_cmnd = NULL;
3536 if (!test_and_clear_bit(qa_indx, queued_in_use_bm)) {
3537 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3538 pr_err("%s: Unexpected completion\n", __func__);
3539 goto the_end;
3540 }
3541
3542 if (unlikely(retiring)) { /* user has reduced max_queue */
3543 int k, retval;
3544
3545 retval = atomic_read(&retired_max_queue);
3546 if (qa_indx >= retval) {
3547 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3548 pr_err("%s: index %d too large\n", __func__, retval);
3549 goto the_end;
3550 }
3551 k = find_last_bit(queued_in_use_bm, retval);
3552 if ((k < scsi_debug_max_queue) || (k == retval))
3553 atomic_set(&retired_max_queue, 0);
3554 else
3555 atomic_set(&retired_max_queue, k + 1);
3556 }
3557 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3558 scp->scsi_done(scp); /* callback to mid level */
3559the_end:
3560 return HRTIMER_NORESTART;
3561}
1da177e4 3562
8dea0d02
FT		 3563static struct sdebug_dev_info *
3564sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags)
5cb2fc06
FT		 3565{
3566 struct sdebug_dev_info *devip;
3567
3568 devip = kzalloc(sizeof(*devip), flags);
3569 if (devip) {
3570 devip->sdbg_host = sdbg_host;
3571 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
3572 }
3573 return devip;
3574}
3575
1da177e4
LT		 3576static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev)
3577{
3578 struct sdebug_host_info * sdbg_host;
3579 struct sdebug_dev_info * open_devip = NULL;
3580 struct sdebug_dev_info * devip =
3581 (struct sdebug_dev_info *)sdev->hostdata;
3582
3583 if (devip)
3584 return devip;
d1e4c9c5
FT		 3585 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
3586 if (!sdbg_host) {
cbf67842 3587 pr_err("%s: Host info NULL\n", __func__);
1da177e4
LT		 3588 return NULL;
3589 }
3590 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
3591 if ((devip->used) && (devip->channel == sdev->channel) &&
3592 (devip->target == sdev->id) &&
3593 (devip->lun == sdev->lun))
3594 return devip;
3595 else {
3596 if ((!devip->used) && (!open_devip))
3597 open_devip = devip;
3598 }
3599 }
5cb2fc06
FT		 3600 if (!open_devip) { /* try and make a new one */
3601 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
3602 if (!open_devip) {
1da177e4 3603 printk(KERN_ERR "%s: out of memory at line %d\n",
cadbd4a5 3604 __func__, __LINE__);
1da177e4
LT		 3605 return NULL;
3606 }
1da177e4 3607 }
a75869d1
FT		 3608
3609 open_devip->channel = sdev->channel;
3610 open_devip->target = sdev->id;
3611 open_devip->lun = sdev->lun;
3612 open_devip->sdbg_host = sdbg_host;
cbf67842
DG		 3613 atomic_set(&open_devip->num_in_q, 0);
3614 set_bit(SDEBUG_UA_POR, open_devip->uas_bm);
c2248fc9 3615 open_devip->used = true;
a75869d1 3616 return open_devip;
1da177e4
LT		 3617}
3618
8dea0d02 3619static int scsi_debug_slave_alloc(struct scsi_device *sdp)
1da177e4 3620{
8dea0d02 3621 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
9cb78c16 3622 printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %llu>\n",
8dea0d02 3623 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
75ad23bc 3624 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue);
8dea0d02
FT		 3625 return 0;
3626}
1da177e4 3627
8dea0d02
FT		 3628static int scsi_debug_slave_configure(struct scsi_device *sdp)
3629{
3630 struct sdebug_dev_info *devip;
a34c4e98 3631
8dea0d02 3632 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
9cb78c16 3633 printk(KERN_INFO "scsi_debug: slave_configure <%u %u %u %llu>\n",
8dea0d02
FT		 3634 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3635 if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN)
3636 sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN;
3637 devip = devInfoReg(sdp);
3638 if (NULL == devip)
3639 return 1; /* no resources, will be marked offline */
c8b09f6f 3640 sdp->hostdata = devip;
6bb5e6e7 3641 blk_queue_max_segment_size(sdp->request_queue, -1U);
78d4e5a0
DG		 3642 if (scsi_debug_no_uld)
3643 sdp->no_uld_attach = 1;
8dea0d02
FT		 3644 return 0;
3645}
3646
3647static void scsi_debug_slave_destroy(struct scsi_device *sdp)
3648{
3649 struct sdebug_dev_info *devip =
3650 (struct sdebug_dev_info *)sdp->hostdata;
a34c4e98 3651
1da177e4 3652 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
9cb78c16 3653 printk(KERN_INFO "scsi_debug: slave_destroy <%u %u %u %llu>\n",
8dea0d02
FT		 3654 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3655 if (devip) {
25985edc 3656 /* make this slot available for re-use */
c2248fc9 3657 devip->used = false;
8dea0d02
FT		 3658 sdp->hostdata = NULL;
3659 }
3660}
3661
cbf67842 3662/* Returns 1 if cmnd found (deletes its timer or tasklet), else returns 0 */
8dea0d02
FT		 3663static int stop_queued_cmnd(struct scsi_cmnd *cmnd)
3664{
3665 unsigned long iflags;
cbf67842 3666 int k, qmax, r_qmax;
8dea0d02 3667 struct sdebug_queued_cmd *sqcp;
cbf67842 3668 struct sdebug_dev_info *devip;
8dea0d02
FT		 3669
3670 spin_lock_irqsave(&queued_arr_lock, iflags);
cbf67842
DG		 3671 qmax = scsi_debug_max_queue;
3672 r_qmax = atomic_read(&retired_max_queue);
3673 if (r_qmax > qmax)
3674 qmax = r_qmax;
3675 for (k = 0; k < qmax; ++k) {
3676 if (test_bit(k, queued_in_use_bm)) {
3677 sqcp = &queued_arr[k];
3678 if (cmnd == sqcp->a_cmnd) {
db525fce
DG		 3679 devip = (struct sdebug_dev_info *)
3680 cmnd->device->hostdata;
3681 if (devip)
3682 atomic_dec(&devip->num_in_q);
3683 sqcp->a_cmnd = NULL;
3684 spin_unlock_irqrestore(&queued_arr_lock,
3685 iflags);
cbf67842
DG		 3686 if (scsi_debug_ndelay > 0) {
3687 if (sqcp->sd_hrtp)
3688 hrtimer_cancel(
3689 &sqcp->sd_hrtp->hrt);
3690 } else if (scsi_debug_delay > 0) {
3691 if (sqcp->cmnd_timerp)
3692 del_timer_sync(
3693 sqcp->cmnd_timerp);
3694 } else if (scsi_debug_delay < 0) {
3695 if (sqcp->tletp)
3696 tasklet_kill(sqcp->tletp);
3697 }
db525fce
DG		 3698 clear_bit(k, queued_in_use_bm);
3699 return 1;
cbf67842 3700 }
8dea0d02
FT		 3701 }
3702 }
3703 spin_unlock_irqrestore(&queued_arr_lock, iflags);
db525fce 3704 return 0;
8dea0d02
FT		 3705}
3706
cbf67842 3707/* Deletes (stops) timers or tasklets of all queued commands */
8dea0d02
FT		 3708static void stop_all_queued(void)
3709{
3710 unsigned long iflags;
3711 int k;
3712 struct sdebug_queued_cmd *sqcp;
cbf67842 3713 struct sdebug_dev_info *devip;
8dea0d02
FT		 3714
3715 spin_lock_irqsave(&queued_arr_lock, iflags);
cbf67842
DG		 3716 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
3717 if (test_bit(k, queued_in_use_bm)) {
3718 sqcp = &queued_arr[k];
3719 if (sqcp->a_cmnd) {
db525fce
DG		 3720 devip = (struct sdebug_dev_info *)
3721 sqcp->a_cmnd->device->hostdata;
3722 if (devip)
3723 atomic_dec(&devip->num_in_q);
3724 sqcp->a_cmnd = NULL;
3725 spin_unlock_irqrestore(&queued_arr_lock,
3726 iflags);
cbf67842
DG		 3727 if (scsi_debug_ndelay > 0) {
3728 if (sqcp->sd_hrtp)
3729 hrtimer_cancel(
3730 &sqcp->sd_hrtp->hrt);
3731 } else if (scsi_debug_delay > 0) {
3732 if (sqcp->cmnd_timerp)
3733 del_timer_sync(
3734 sqcp->cmnd_timerp);
3735 } else if (scsi_debug_delay < 0) {
3736 if (sqcp->tletp)
3737 tasklet_kill(sqcp->tletp);
3738 }
db525fce
DG		 3739 clear_bit(k, queued_in_use_bm);
3740 spin_lock_irqsave(&queued_arr_lock, iflags);
cbf67842 3741 }
8dea0d02
FT		 3742 }
3743 }
3744 spin_unlock_irqrestore(&queued_arr_lock, iflags);
1da177e4
LT		 3745}
3746
cbf67842
DG		 3747/* Free queued command memory on heap */
3748static void free_all_queued(void)
1da177e4 3749{
cbf67842
DG		 3750 unsigned long iflags;
3751 int k;
3752 struct sdebug_queued_cmd *sqcp;
3753
3754 spin_lock_irqsave(&queued_arr_lock, iflags);
3755 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
3756 sqcp = &queued_arr[k];
3757 kfree(sqcp->cmnd_timerp);
3758 sqcp->cmnd_timerp = NULL;
3759 kfree(sqcp->tletp);
3760 sqcp->tletp = NULL;
3761 kfree(sqcp->sd_hrtp);
3762 sqcp->sd_hrtp = NULL;
3763 }
3764 spin_unlock_irqrestore(&queued_arr_lock, iflags);
1da177e4
LT		 3765}
3766
cbf67842 3767static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
1da177e4 3768{
cbf67842
DG		 3769 ++num_aborts;
3770 if (SCpnt) {
3771 if (SCpnt->device &&
3772 (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts))
3773 sdev_printk(KERN_INFO, SCpnt->device, "%s\n",
3774 __func__);
3775 stop_queued_cmnd(SCpnt);
3776 }
3777 return SUCCESS;
1da177e4
LT		 3778}
3779
3780static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
3781{
3782 struct sdebug_dev_info * devip;
3783
1da177e4 3784 ++num_dev_resets;
cbf67842
DG		 3785 if (SCpnt && SCpnt->device) {
3786 struct scsi_device *sdp = SCpnt->device;
3787
3788 if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
3789 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3790 devip = devInfoReg(sdp);
1da177e4 3791 if (devip)
cbf67842
DG		 3792 set_bit(SDEBUG_UA_POR, devip->uas_bm);
3793 }
3794 return SUCCESS;
3795}
3796
3797static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
3798{
3799 struct sdebug_host_info *sdbg_host;
3800 struct sdebug_dev_info *devip;
3801 struct scsi_device *sdp;
3802 struct Scsi_Host *hp;
3803 int k = 0;
3804
3805 ++num_target_resets;
3806 if (!SCpnt)
3807 goto lie;
3808 sdp = SCpnt->device;
3809 if (!sdp)
3810 goto lie;
3811 if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
3812 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3813 hp = sdp->host;
3814 if (!hp)
3815 goto lie;
3816 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
3817 if (sdbg_host) {
3818 list_for_each_entry(devip,
3819 &sdbg_host->dev_info_list,
3820 dev_list)
3821 if (devip->target == sdp->id) {
3822 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3823 ++k;
3824 }
1da177e4 3825 }
cbf67842
DG		 3826 if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
3827 sdev_printk(KERN_INFO, sdp,
3828 "%s: %d device(s) found in target\n", __func__, k);
3829lie:
1da177e4
LT		 3830 return SUCCESS;
3831}
3832
3833static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
3834{
3835 struct sdebug_host_info *sdbg_host;
cbf67842 3836 struct sdebug_dev_info *devip;
1da177e4
LT		 3837 struct scsi_device * sdp;
3838 struct Scsi_Host * hp;
cbf67842 3839 int k = 0;
1da177e4 3840
1da177e4 3841 ++num_bus_resets;
cbf67842
DG		 3842 if (!(SCpnt && SCpnt->device))
3843 goto lie;
3844 sdp = SCpnt->device;
3845 if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
3846 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3847 hp = sdp->host;
3848 if (hp) {
d1e4c9c5 3849 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
1da177e4 3850 if (sdbg_host) {
cbf67842 3851 list_for_each_entry(devip,
1da177e4 3852 &sdbg_host->dev_info_list,
cbf67842
DG		 3853 dev_list) {
3854 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3855 ++k;
3856 }
1da177e4
LT		 3857 }
3858 }
cbf67842
DG		 3859 if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
3860 sdev_printk(KERN_INFO, sdp,
3861 "%s: %d device(s) found in host\n", __func__, k);
3862lie:
1da177e4
LT		 3863 return SUCCESS;
3864}
3865
3866static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
3867{
3868 struct sdebug_host_info * sdbg_host;
cbf67842
DG		 3869 struct sdebug_dev_info *devip;
3870 int k = 0;
1da177e4 3871
1da177e4 3872 ++num_host_resets;
cbf67842
DG		 3873 if ((SCpnt->device) && (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts))
3874 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
1da177e4
LT		 3875 spin_lock(&sdebug_host_list_lock);
3876 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
cbf67842
DG		 3877 list_for_each_entry(devip, &sdbg_host->dev_info_list,
3878 dev_list) {
3879 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3880 ++k;
3881 }
1da177e4
LT		 3882 }
3883 spin_unlock(&sdebug_host_list_lock);
3884 stop_all_queued();
cbf67842
DG		 3885 if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
3886 sdev_printk(KERN_INFO, SCpnt->device,
3887 "%s: %d device(s) found\n", __func__, k);
1da177e4
LT		 3888 return SUCCESS;
3889}
3890
f58b0efb 3891static void __init sdebug_build_parts(unsigned char *ramp,
5f2578e5 3892 unsigned long store_size)
1da177e4
LT		 3893{
3894 struct partition * pp;
3895 int starts[SDEBUG_MAX_PARTS + 2];
3896 int sectors_per_part, num_sectors, k;
3897 int heads_by_sects, start_sec, end_sec;
3898
3899 /* assume partition table already zeroed */
f58b0efb 3900 if ((scsi_debug_num_parts < 1) || (store_size < 1048576))
1da177e4
LT		 3901 return;
3902 if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) {
3903 scsi_debug_num_parts = SDEBUG_MAX_PARTS;
cbf67842
DG		 3904 pr_warn("%s: reducing partitions to %d\n", __func__,
3905 SDEBUG_MAX_PARTS);
1da177e4 3906 }
c65b1445 3907 num_sectors = (int)sdebug_store_sectors;
1da177e4
LT		 3908 sectors_per_part = (num_sectors - sdebug_sectors_per)
3909 / scsi_debug_num_parts;
3910 heads_by_sects = sdebug_heads * sdebug_sectors_per;
3911 starts[0] = sdebug_sectors_per;
3912 for (k = 1; k < scsi_debug_num_parts; ++k)
3913 starts[k] = ((k * sectors_per_part) / heads_by_sects)
3914 * heads_by_sects;
3915 starts[scsi_debug_num_parts] = num_sectors;
3916 starts[scsi_debug_num_parts + 1] = 0;
3917
3918 ramp[510] = 0x55; /* magic partition markings */
3919 ramp[511] = 0xAA;
3920 pp = (struct partition *)(ramp + 0x1be);
3921 for (k = 0; starts[k + 1]; ++k, ++pp) {
3922 start_sec = starts[k];
3923 end_sec = starts[k + 1] - 1;
3924 pp->boot_ind = 0;
3925
3926 pp->cyl = start_sec / heads_by_sects;
3927 pp->head = (start_sec - (pp->cyl * heads_by_sects))
3928 / sdebug_sectors_per;
3929 pp->sector = (start_sec % sdebug_sectors_per) + 1;
3930
3931 pp->end_cyl = end_sec / heads_by_sects;
3932 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
3933 / sdebug_sectors_per;
3934 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
3935
150c3544
AM		 3936 pp->start_sect = cpu_to_le32(start_sec);
3937 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
1da177e4
LT		 3938 pp->sys_ind = 0x83; /* plain Linux partition */
3939 }
3940}
3941
cbf67842
DG		 3942static int
3943schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
3944 int scsi_result, int delta_jiff)
1da177e4 3945{
cbf67842 3946 unsigned long iflags;
cd62b7da 3947 int k, num_in_q, qdepth, inject;
cbf67842
DG		 3948 struct sdebug_queued_cmd *sqcp = NULL;
3949 struct scsi_device *sdp = cmnd->device;
3950
3951 if (NULL == cmnd || NULL == devip) {
3952 pr_warn("%s: called with NULL cmnd or devip pointer\n",
3953 __func__);
3954 /* no particularly good error to report back */
3955 return SCSI_MLQUEUE_HOST_BUSY;
3956 }
3957 if ((scsi_result) && (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
3958 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
3959 __func__, scsi_result);
cd62b7da
DG		 3960 if (delta_jiff == 0)
3961 goto respond_in_thread;
1da177e4 3962
cd62b7da 3963 /* schedule the response at a later time if resources permit */
cbf67842
DG		 3964 spin_lock_irqsave(&queued_arr_lock, iflags);
3965 num_in_q = atomic_read(&devip->num_in_q);
3966 qdepth = cmnd->device->queue_depth;
cbf67842 3967 inject = 0;
cd62b7da
DG		 3968 if ((qdepth > 0) && (num_in_q >= qdepth)) {
3969 if (scsi_result) {
3970 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3971 goto respond_in_thread;
3972 } else
3973 scsi_result = device_qfull_result;
3974 } else if ((scsi_debug_every_nth != 0) &&
3975 (SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts) &&
3976 (scsi_result == 0)) {
cbf67842
DG		 3977 if ((num_in_q == (qdepth - 1)) &&
3978 (atomic_inc_return(&sdebug_a_tsf) >=
3979 abs(scsi_debug_every_nth))) {
3980 atomic_set(&sdebug_a_tsf, 0);
3981 inject = 1;
cd62b7da 3982 scsi_result = device_qfull_result;
1da177e4
LT		 3983 }
3984 }
1da177e4 3985
cd62b7da 3986 k = find_first_zero_bit(queued_in_use_bm, scsi_debug_max_queue);
cbf67842 3987 if (k >= scsi_debug_max_queue) {
cbf67842 3988 spin_unlock_irqrestore(&queued_arr_lock, iflags);
cd62b7da
DG		 3989 if (scsi_result)
3990 goto respond_in_thread;
3991 else if (SCSI_DEBUG_OPT_ALL_TSF & scsi_debug_opts)
3992 scsi_result = device_qfull_result;
cbf67842
DG		 3993 if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts)
3994 sdev_printk(KERN_INFO, sdp,
cd62b7da
DG		 3995 "%s: max_queue=%d exceeded, %s\n",
3996 __func__, scsi_debug_max_queue,
3997 (scsi_result ? "status: TASK SET FULL" :
3998 "report: host busy"));
3999 if (scsi_result)
4000 goto respond_in_thread;
4001 else
cbf67842
DG		 4002 return SCSI_MLQUEUE_HOST_BUSY;
4003 }
4004 __set_bit(k, queued_in_use_bm);
4005 atomic_inc(&devip->num_in_q);
4006 sqcp = &queued_arr[k];
4007 sqcp->a_cmnd = cmnd;
4008 cmnd->result = scsi_result;
4009 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4010 if (delta_jiff > 0) {
4011 if (NULL == sqcp->cmnd_timerp) {
4012 sqcp->cmnd_timerp = kmalloc(sizeof(struct timer_list),
4013 GFP_ATOMIC);
4014 if (NULL == sqcp->cmnd_timerp)
4015 return SCSI_MLQUEUE_HOST_BUSY;
4016 init_timer(sqcp->cmnd_timerp);
1da177e4 4017 }
cbf67842
DG		 4018 sqcp->cmnd_timerp->function = sdebug_q_cmd_complete;
4019 sqcp->cmnd_timerp->data = k;
4020 sqcp->cmnd_timerp->expires = get_jiffies_64() + delta_jiff;
4021 add_timer(sqcp->cmnd_timerp);
4022 } else if (scsi_debug_ndelay > 0) {
4023 ktime_t kt = ktime_set(0, scsi_debug_ndelay);
4024 struct sdebug_hrtimer *sd_hp = sqcp->sd_hrtp;
4025
4026 if (NULL == sd_hp) {
4027 sd_hp = kmalloc(sizeof(*sd_hp), GFP_ATOMIC);
4028 if (NULL == sd_hp)
4029 return SCSI_MLQUEUE_HOST_BUSY;
4030 sqcp->sd_hrtp = sd_hp;
4031 hrtimer_init(&sd_hp->hrt, CLOCK_MONOTONIC,
4032 HRTIMER_MODE_REL);
4033 sd_hp->hrt.function = sdebug_q_cmd_hrt_complete;
4034 sd_hp->qa_indx = k;
1da177e4 4035 }
cbf67842
DG		 4036 hrtimer_start(&sd_hp->hrt, kt, HRTIMER_MODE_REL);
4037 } else { /* delay < 0 */
4038 if (NULL == sqcp->tletp) {
4039 sqcp->tletp = kmalloc(sizeof(*sqcp->tletp),
4040 GFP_ATOMIC);
4041 if (NULL == sqcp->tletp)
4042 return SCSI_MLQUEUE_HOST_BUSY;
4043 tasklet_init(sqcp->tletp,
4044 sdebug_q_cmd_complete, k);
4045 }
4046 if (-1 == delta_jiff)
4047 tasklet_hi_schedule(sqcp->tletp);
4048 else
4049 tasklet_schedule(sqcp->tletp);
1da177e4 4050 }
cd62b7da
DG		 4051 if ((SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) &&
4052 (scsi_result == device_qfull_result))
cbf67842
DG		 4053 sdev_printk(KERN_INFO, sdp,
4054 "%s: num_in_q=%d +1, %s%s\n", __func__,
4055 num_in_q, (inject ? "<inject> " : ""),
4056 "status: TASK SET FULL");
4057 return 0;
cd62b7da
DG		 4058
4059respond_in_thread: /* call back to mid-layer using invocation thread */
4060 cmnd->result = scsi_result;
4061 cmnd->scsi_done(cmnd);
4062 return 0;
1da177e4 4063}
cbf67842 4064
23183910
DG		 4065/* Note: The following macros create attribute files in the
4066 /sys/module/scsi_debug/parameters directory. Unfortunately this
4067 driver is unaware of a change and cannot trigger auxiliary actions
4068 as it can when the corresponding attribute in the
4069 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
4070 */
c65b1445 4071module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR);
5b94e232 4072module_param_named(ato, scsi_debug_ato, int, S_IRUGO);
0759c666 4073module_param_named(clustering, scsi_debug_clustering, bool, S_IRUGO | S_IWUSR);
c65b1445
DG		 4074module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR);
4075module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO);
5b94e232
MP		 4076module_param_named(dif, scsi_debug_dif, int, S_IRUGO);
4077module_param_named(dix, scsi_debug_dix, int, S_IRUGO);
c65b1445
DG		 4078module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR);
4079module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR);
23183910 4080module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR);
68aee7ba 4081module_param_named(guard, scsi_debug_guard, uint, S_IRUGO);
cbf67842 4082module_param_named(host_lock, scsi_debug_host_lock, bool, S_IRUGO | S_IWUSR);
5b94e232
MP		 4083module_param_named(lbpu, scsi_debug_lbpu, int, S_IRUGO);
4084module_param_named(lbpws, scsi_debug_lbpws, int, S_IRUGO);
4085module_param_named(lbpws10, scsi_debug_lbpws10, int, S_IRUGO);
be1dd78d 4086module_param_named(lbprz, scsi_debug_lbprz, int, S_IRUGO);
5b94e232 4087module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO);
c65b1445 4088module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR);
78d4e5a0 4089module_param_named(max_queue, scsi_debug_max_queue, int, S_IRUGO | S_IWUSR);
cbf67842 4090module_param_named(ndelay, scsi_debug_ndelay, int, S_IRUGO | S_IWUSR);
c65b1445 4091module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR);
78d4e5a0 4092module_param_named(no_uld, scsi_debug_no_uld, int, S_IRUGO);
c65b1445
DG		 4093module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO);
4094module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR);
5b94e232 4095module_param_named(opt_blks, scsi_debug_opt_blks, int, S_IRUGO);
c65b1445 4096module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR);
5b94e232 4097module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO);
c65b1445 4098module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR);
d986788b 4099module_param_named(removable, scsi_debug_removable, bool, S_IRUGO | S_IWUSR);
c65b1445 4100module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO);
597136ab 4101module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO);
c2248fc9 4102module_param_named(strict, scsi_debug_strict, bool, S_IRUGO | S_IWUSR);
5b94e232
MP		 4103module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO);
4104module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO);
44d92694
MP		 4105module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO);
4106module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, int, S_IRUGO);
5b94e232
MP		 4107module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR);
4108module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int,
4109 S_IRUGO | S_IWUSR);
4110module_param_named(write_same_length, scsi_debug_write_same_length, int,
4111 S_IRUGO | S_IWUSR);
1da177e4
LT		 4112
4113MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
4114MODULE_DESCRIPTION("SCSI debug adapter driver");
4115MODULE_LICENSE("GPL");
4116MODULE_VERSION(SCSI_DEBUG_VERSION);
4117
4118MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
5b94e232 4119MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
0759c666 4120MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
cbf67842 4121MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
c2248fc9 4122MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)");
5b94e232
MP		 4123MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
4124MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
c65b1445 4125MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
beb87c33 4126MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
23183910 4127MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
5b94e232 4128MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
cbf67842 4129MODULE_PARM_DESC(host_lock, "use host_lock around all commands (def=0)");
5b94e232
MP		 4130MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
4131MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
4132MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
be1dd78d 4133MODULE_PARM_DESC(lbprz, "unmapped blocks return 0 on read (def=1)");
5b94e232 4134MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
c65b1445 4135MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
cbf67842
DG		 4136MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
4137MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
c65b1445 4138MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
78d4e5a0 4139MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
1da177e4 4140MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
c65b1445 4141MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
5b94e232 4142MODULE_PARM_DESC(opt_blks, "optimal transfer length in block (def=64)");
6f3cbf55 4143MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
5b94e232 4144MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
1da177e4 4145MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
d986788b 4146MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
e46b0344 4147MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=6[SPC-4])");
ea61fca5 4148MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
c2248fc9 4149MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)");
5b94e232
MP		 4150MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
4151MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
6014759c
MP		 4152MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
4153MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
c2248fc9 4154MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)");
5b94e232
MP		 4155MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
4156MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
1da177e4
LT		 4157
4158static char sdebug_info[256];
4159
4160static const char * scsi_debug_info(struct Scsi_Host * shp)
4161{
4162 sprintf(sdebug_info, "scsi_debug, version %s [%s], "
4163 "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION,
4164 scsi_debug_version_date, scsi_debug_dev_size_mb,
4165 scsi_debug_opts);
4166 return sdebug_info;
4167}
4168
cbf67842 4169/* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */
c8ed555a 4170static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer, int length)
1da177e4 4171{
c8ed555a
AV		 4172 char arr[16];
4173 int opts;
4174 int minLen = length > 15 ? 15 : length;
1da177e4 4175
c8ed555a
AV		 4176 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
4177 return -EACCES;
4178 memcpy(arr, buffer, minLen);
4179 arr[minLen] = '\0';
4180 if (1 != sscanf(arr, "%d", &opts))
4181 return -EINVAL;
4182 scsi_debug_opts = opts;
4183 if (scsi_debug_every_nth != 0)
cbf67842 4184 atomic_set(&sdebug_cmnd_count, 0);
c8ed555a
AV		 4185 return length;
4186}
1da177e4 4187
cbf67842
DG		 4188/* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the
4189 * same for each scsi_debug host (if more than one). Some of the counters
4190 * output are not atomics so might be inaccurate in a busy system. */
c8ed555a
AV		 4191static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
4192{
cbf67842
DG		 4193 int f, l;
4194 char b[32];
4195
4196 if (scsi_debug_every_nth > 0)
4197 snprintf(b, sizeof(b), " (curr:%d)",
4198 ((SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts) ?
4199 atomic_read(&sdebug_a_tsf) :
4200 atomic_read(&sdebug_cmnd_count)));
4201 else
4202 b[0] = '\0';
4203
4204 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n"
4205 "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, "
4206 "every_nth=%d%s\n"
4207 "delay=%d, ndelay=%d, max_luns=%d, q_completions=%d\n"
4208 "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n"
4209 "command aborts=%d; RESETs: device=%d, target=%d, bus=%d, "
4210 "host=%d\ndix_reads=%d dix_writes=%d dif_errors=%d "
4211 "usec_in_jiffy=%lu\n",
4212 SCSI_DEBUG_VERSION, scsi_debug_version_date,
4213 scsi_debug_num_tgts, scsi_debug_dev_size_mb, scsi_debug_opts,
4214 scsi_debug_every_nth, b, scsi_debug_delay, scsi_debug_ndelay,
4215 scsi_debug_max_luns, atomic_read(&sdebug_completions),
4216 scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads,
4217 sdebug_sectors_per, num_aborts, num_dev_resets,
4218 num_target_resets, num_bus_resets, num_host_resets,
4219 dix_reads, dix_writes, dif_errors, TICK_NSEC / 1000);
4220
4221 f = find_first_bit(queued_in_use_bm, scsi_debug_max_queue);
4222 if (f != scsi_debug_max_queue) {
4223 l = find_last_bit(queued_in_use_bm, scsi_debug_max_queue);
4224 seq_printf(m, " %s BUSY: first,last bits set: %d,%d\n",
4225 "queued_in_use_bm", f, l);
4226 }
c8ed555a 4227 return 0;
1da177e4
LT		 4228}
4229
82069379 4230static ssize_t delay_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4231{
4232 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay);
4233}
cbf67842 4234/* Returns -EBUSY if delay is being changed and commands are queued */
82069379
AM		 4235static ssize_t delay_store(struct device_driver *ddp, const char *buf,
4236 size_t count)
1da177e4 4237{
cbf67842
DG		 4238 int delay, res;
4239
4240 if ((count > 0) && (1 == sscanf(buf, "%d", &delay))) {
4241 res = count;
4242 if (scsi_debug_delay != delay) {
4243 unsigned long iflags;
4244 int k;
4245
4246 spin_lock_irqsave(&queued_arr_lock, iflags);
4247 k = find_first_bit(queued_in_use_bm,
4248 scsi_debug_max_queue);
4249 if (k != scsi_debug_max_queue)
4250 res = -EBUSY; /* have queued commands */
4251 else {
4252 scsi_debug_delay = delay;
4253 scsi_debug_ndelay = 0;
4254 }
4255 spin_unlock_irqrestore(&queued_arr_lock, iflags);
1da177e4 4256 }
cbf67842 4257 return res;
1da177e4
LT		 4258 }
4259 return -EINVAL;
4260}
82069379 4261static DRIVER_ATTR_RW(delay);
1da177e4 4262
cbf67842
DG		 4263static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
4264{
4265 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ndelay);
4266}
4267/* Returns -EBUSY if ndelay is being changed and commands are queued */
4268/* If > 0 and accepted then scsi_debug_delay is set to DELAY_OVERRIDDEN */
4269static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
4270 size_t count)
4271{
4272 unsigned long iflags;
4273 int ndelay, res, k;
4274
4275 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
4276 (ndelay >= 0) && (ndelay < 1000000000)) {
4277 res = count;
4278 if (scsi_debug_ndelay != ndelay) {
4279 spin_lock_irqsave(&queued_arr_lock, iflags);
4280 k = find_first_bit(queued_in_use_bm,
4281 scsi_debug_max_queue);
4282 if (k != scsi_debug_max_queue)
4283 res = -EBUSY; /* have queued commands */
4284 else {
4285 scsi_debug_ndelay = ndelay;
4286 scsi_debug_delay = ndelay ? DELAY_OVERRIDDEN
4287 : DEF_DELAY;
4288 }
4289 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4290 }
4291 return res;
4292 }
4293 return -EINVAL;
4294}
4295static DRIVER_ATTR_RW(ndelay);
4296
82069379 4297static ssize_t opts_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4298{
4299 return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts);
4300}
4301
82069379
AM		 4302static ssize_t opts_store(struct device_driver *ddp, const char *buf,
4303 size_t count)
1da177e4
LT		 4304{
4305 int opts;
4306 char work[20];
4307
4308 if (1 == sscanf(buf, "%10s", work)) {
48a96876 4309 if (0 == strncasecmp(work,"0x", 2)) {
1da177e4
LT		 4310 if (1 == sscanf(&work[2], "%x", &opts))
4311 goto opts_done;
4312 } else {
4313 if (1 == sscanf(work, "%d", &opts))
4314 goto opts_done;
4315 }
4316 }
4317 return -EINVAL;
4318opts_done:
4319 scsi_debug_opts = opts;
817fd66b
DG		 4320 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
4321 sdebug_any_injecting_opt = true;
4322 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
4323 sdebug_any_injecting_opt = true;
4324 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
4325 sdebug_any_injecting_opt = true;
4326 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
4327 sdebug_any_injecting_opt = true;
4328 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
4329 sdebug_any_injecting_opt = true;
cbf67842
DG		 4330 atomic_set(&sdebug_cmnd_count, 0);
4331 atomic_set(&sdebug_a_tsf, 0);
1da177e4
LT		 4332 return count;
4333}
82069379 4334static DRIVER_ATTR_RW(opts);
1da177e4 4335
82069379 4336static ssize_t ptype_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4337{
4338 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype);
4339}
82069379
AM		 4340static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
4341 size_t count)
1da177e4
LT		 4342{
4343 int n;
4344
4345 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4346 scsi_debug_ptype = n;
4347 return count;
4348 }
4349 return -EINVAL;
4350}
82069379 4351static DRIVER_ATTR_RW(ptype);
1da177e4 4352
82069379 4353static ssize_t dsense_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4354{
4355 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense);
4356}
82069379
AM		 4357static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
4358 size_t count)
1da177e4
LT		 4359{
4360 int n;
4361
4362 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4363 scsi_debug_dsense = n;
4364 return count;
4365 }
4366 return -EINVAL;
4367}
82069379 4368static DRIVER_ATTR_RW(dsense);
1da177e4 4369
82069379 4370static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
23183910
DG		 4371{
4372 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw);
4373}
82069379
AM		 4374static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
4375 size_t count)
23183910
DG		 4376{
4377 int n;
4378
4379 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
cbf67842
DG		 4380 n = (n > 0);
4381 scsi_debug_fake_rw = (scsi_debug_fake_rw > 0);
4382 if (scsi_debug_fake_rw != n) {
4383 if ((0 == n) && (NULL == fake_storep)) {
4384 unsigned long sz =
4385 (unsigned long)scsi_debug_dev_size_mb *
4386 1048576;
4387
4388 fake_storep = vmalloc(sz);
4389 if (NULL == fake_storep) {
4390 pr_err("%s: out of memory, 9\n",
4391 __func__);
4392 return -ENOMEM;
4393 }
4394 memset(fake_storep, 0, sz);
4395 }
4396 scsi_debug_fake_rw = n;
4397 }
23183910
DG		 4398 return count;
4399 }
4400 return -EINVAL;
4401}
82069379 4402static DRIVER_ATTR_RW(fake_rw);
23183910 4403
82069379 4404static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
c65b1445
DG		 4405{
4406 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0);
4407}
82069379
AM		 4408static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
4409 size_t count)
c65b1445
DG		 4410{
4411 int n;
4412
4413 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4414 scsi_debug_no_lun_0 = n;
4415 return count;
4416 }
4417 return -EINVAL;
4418}
82069379 4419static DRIVER_ATTR_RW(no_lun_0);
c65b1445 4420
82069379 4421static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4422{
4423 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts);
4424}
82069379
AM		 4425static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
4426 size_t count)
1da177e4
LT		 4427{
4428 int n;
4429
4430 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4431 scsi_debug_num_tgts = n;
4432 sdebug_max_tgts_luns();
4433 return count;
4434 }
4435 return -EINVAL;
4436}
82069379 4437static DRIVER_ATTR_RW(num_tgts);
1da177e4 4438
82069379 4439static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4440{
4441 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb);
4442}
82069379 4443static DRIVER_ATTR_RO(dev_size_mb);
1da177e4 4444
82069379 4445static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4446{
4447 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts);
4448}
82069379 4449static DRIVER_ATTR_RO(num_parts);
1da177e4 4450
82069379 4451static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4452{
4453 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth);
4454}
82069379
AM		 4455static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
4456 size_t count)
1da177e4
LT		 4457{
4458 int nth;
4459
4460 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
4461 scsi_debug_every_nth = nth;
cbf67842 4462 atomic_set(&sdebug_cmnd_count, 0);
1da177e4
LT		 4463 return count;
4464 }
4465 return -EINVAL;
4466}
82069379 4467static DRIVER_ATTR_RW(every_nth);
1da177e4 4468
82069379 4469static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4470{
4471 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns);
4472}
82069379
AM		 4473static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
4474 size_t count)
1da177e4
LT		 4475{
4476 int n;
19c8ead7 4477 bool changed;
1da177e4
LT		 4478
4479 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
19c8ead7 4480 changed = (scsi_debug_max_luns != n);
1da177e4
LT		 4481 scsi_debug_max_luns = n;
4482 sdebug_max_tgts_luns();
19c8ead7
EM		 4483 if (changed && (scsi_debug_scsi_level >= 5)) { /* >= SPC-3 */
4484 struct sdebug_host_info *sdhp;
4485 struct sdebug_dev_info *dp;
4486
4487 spin_lock(&sdebug_host_list_lock);
4488 list_for_each_entry(sdhp, &sdebug_host_list,
4489 host_list) {
4490 list_for_each_entry(dp, &sdhp->dev_info_list,
4491 dev_list) {
4492 set_bit(SDEBUG_UA_LUNS_CHANGED,
4493 dp->uas_bm);
4494 }
4495 }
4496 spin_unlock(&sdebug_host_list_lock);
4497 }
1da177e4
LT		 4498 return count;
4499 }
4500 return -EINVAL;
4501}
82069379 4502static DRIVER_ATTR_RW(max_luns);
1da177e4 4503
82069379 4504static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
78d4e5a0
DG		 4505{
4506 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_queue);
4507}
cbf67842
DG		 4508/* N.B. max_queue can be changed while there are queued commands. In flight
4509 * commands beyond the new max_queue will be completed. */
82069379
AM		 4510static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
4511 size_t count)
78d4e5a0 4512{
cbf67842
DG		 4513 unsigned long iflags;
4514 int n, k;
78d4e5a0
DG		 4515
4516 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
4517 (n <= SCSI_DEBUG_CANQUEUE)) {
cbf67842
DG		 4518 spin_lock_irqsave(&queued_arr_lock, iflags);
4519 k = find_last_bit(queued_in_use_bm, SCSI_DEBUG_CANQUEUE);
78d4e5a0 4520 scsi_debug_max_queue = n;
cbf67842
DG		 4521 if (SCSI_DEBUG_CANQUEUE == k)
4522 atomic_set(&retired_max_queue, 0);
4523 else if (k >= n)
4524 atomic_set(&retired_max_queue, k + 1);
4525 else
4526 atomic_set(&retired_max_queue, 0);
4527 spin_unlock_irqrestore(&queued_arr_lock, iflags);
78d4e5a0
DG		 4528 return count;
4529 }
4530 return -EINVAL;
4531}
82069379 4532static DRIVER_ATTR_RW(max_queue);
78d4e5a0 4533
82069379 4534static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
78d4e5a0
DG		 4535{
4536 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_uld);
4537}
82069379 4538static DRIVER_ATTR_RO(no_uld);
78d4e5a0 4539
82069379 4540static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4541{
4542 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level);
4543}
82069379 4544static DRIVER_ATTR_RO(scsi_level);
1da177e4 4545
82069379 4546static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
c65b1445
DG		 4547{
4548 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb);
4549}
82069379
AM		 4550static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
4551 size_t count)
c65b1445 4552{
c2248fc9 4553 int n;
0d01c5df 4554 bool changed;
c65b1445
DG		 4555
4556 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
0d01c5df 4557 changed = (scsi_debug_virtual_gb != n);
c65b1445 4558 scsi_debug_virtual_gb = n;
28898873 4559 sdebug_capacity = get_sdebug_capacity();
0d01c5df
DG		 4560 if (changed) {
4561 struct sdebug_host_info *sdhp;
4562 struct sdebug_dev_info *dp;
4563
4bc6b634 4564 spin_lock(&sdebug_host_list_lock);
0d01c5df
DG		 4565 list_for_each_entry(sdhp, &sdebug_host_list,
4566 host_list) {
4567 list_for_each_entry(dp, &sdhp->dev_info_list,
4568 dev_list) {
4569 set_bit(SDEBUG_UA_CAPACITY_CHANGED,
4570 dp->uas_bm);
4571 }
4572 }
4bc6b634 4573 spin_unlock(&sdebug_host_list_lock);
0d01c5df 4574 }
c65b1445
DG		 4575 return count;
4576 }
4577 return -EINVAL;
4578}
82069379 4579static DRIVER_ATTR_RW(virtual_gb);
c65b1445 4580
82069379 4581static ssize_t add_host_show(struct device_driver *ddp, char *buf)
1da177e4
LT		 4582{
4583 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host);
4584}
4585
82069379
AM		 4586static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
4587 size_t count)
1da177e4 4588{
f3df41cf 4589 int delta_hosts;
1da177e4 4590
f3df41cf 4591 if (sscanf(buf, "%d", &delta_hosts) != 1)
1da177e4 4592 return -EINVAL;
1da177e4
LT		 4593 if (delta_hosts > 0) {
4594 do {
4595 sdebug_add_adapter();
4596 } while (--delta_hosts);
4597 } else if (delta_hosts < 0) {
4598 do {
4599 sdebug_remove_adapter();
4600 } while (++delta_hosts);
4601 }
4602 return count;
4603}
82069379 4604static DRIVER_ATTR_RW(add_host);
1da177e4 4605
82069379 4606static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
23183910
DG		 4607{
4608 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_vpd_use_hostno);
4609}
82069379
AM		 4610static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
4611 size_t count)
23183910
DG		 4612{
4613 int n;
4614
4615 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4616 scsi_debug_vpd_use_hostno = n;
4617 return count;
4618 }
4619 return -EINVAL;
4620}
82069379 4621static DRIVER_ATTR_RW(vpd_use_hostno);
23183910 4622
82069379 4623static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
597136ab
MP		 4624{
4625 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size);
4626}
82069379 4627static DRIVER_ATTR_RO(sector_size);
597136ab 4628
82069379 4629static ssize_t dix_show(struct device_driver *ddp, char *buf)
c6a44287
MP		 4630{
4631 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix);
4632}
82069379 4633static DRIVER_ATTR_RO(dix);
c6a44287 4634
82069379 4635static ssize_t dif_show(struct device_driver *ddp, char *buf)
c6a44287
MP		 4636{
4637 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif);
4638}
82069379 4639static DRIVER_ATTR_RO(dif);
c6a44287 4640
82069379 4641static ssize_t guard_show(struct device_driver *ddp, char *buf)
c6a44287 4642{
68aee7ba 4643 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_guard);
c6a44287 4644}
82069379 4645static DRIVER_ATTR_RO(guard);
c6a44287 4646
82069379 4647static ssize_t ato_show(struct device_driver *ddp, char *buf)
c6a44287
MP		 4648{
4649 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato);
4650}
82069379 4651static DRIVER_ATTR_RO(ato);
c6a44287 4652
82069379 4653static ssize_t map_show(struct device_driver *ddp, char *buf)
44d92694
MP		 4654{
4655 ssize_t count;
4656
5b94e232 4657 if (!scsi_debug_lbp())
44d92694
MP		 4658 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
4659 sdebug_store_sectors);
4660
c7badc90
TH		 4661 count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
4662 (int)map_size, map_storep);
44d92694 4663 buf[count++] = '\n';
c7badc90 4664 buf[count] = '\0';
44d92694
MP		 4665
4666 return count;
4667}
82069379 4668static DRIVER_ATTR_RO(map);
44d92694 4669
82069379 4670static ssize_t removable_show(struct device_driver *ddp, char *buf)
d986788b
MP		 4671{
4672 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_removable ? 1 : 0);
4673}
82069379
AM		 4674static ssize_t removable_store(struct device_driver *ddp, const char *buf,
4675 size_t count)
d986788b
MP		 4676{
4677 int n;
4678
4679 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4680 scsi_debug_removable = (n > 0);
4681 return count;
4682 }
4683 return -EINVAL;
4684}
82069379 4685static DRIVER_ATTR_RW(removable);
d986788b 4686
cbf67842
DG		 4687static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
4688{
4689 return scnprintf(buf, PAGE_SIZE, "%d\n", !!scsi_debug_host_lock);
4690}
4691/* Returns -EBUSY if host_lock is being changed and commands are queued */
4692static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
4693 size_t count)
4694{
4695 int n, res;
4696
4697 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4698 bool new_host_lock = (n > 0);
4699
4700 res = count;
4701 if (new_host_lock != scsi_debug_host_lock) {
4702 unsigned long iflags;
4703 int k;
4704
4705 spin_lock_irqsave(&queued_arr_lock, iflags);
4706 k = find_first_bit(queued_in_use_bm,
4707 scsi_debug_max_queue);
4708 if (k != scsi_debug_max_queue)
4709 res = -EBUSY; /* have queued commands */
4710 else
4711 scsi_debug_host_lock = new_host_lock;
4712 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4713 }
4714 return res;
4715 }
4716 return -EINVAL;
4717}
4718static DRIVER_ATTR_RW(host_lock);
4719
c2248fc9
DG		 4720static ssize_t strict_show(struct device_driver *ddp, char *buf)
4721{
4722 return scnprintf(buf, PAGE_SIZE, "%d\n", !!scsi_debug_strict);
4723}
4724static ssize_t strict_store(struct device_driver *ddp, const char *buf,
4725 size_t count)
4726{
4727 int n;
4728
4729 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4730 scsi_debug_strict = (n > 0);
4731 return count;
4732 }
4733 return -EINVAL;
4734}
4735static DRIVER_ATTR_RW(strict);
4736
cbf67842 4737
82069379 4738/* Note: The following array creates attribute files in the
23183910
DG		 4739 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
4740 files (over those found in the /sys/module/scsi_debug/parameters
4741 directory) is that auxiliary actions can be triggered when an attribute
4742 is changed. For example see: sdebug_add_host_store() above.
4743 */
6ecaff7f 4744
82069379
AM		 4745static struct attribute *sdebug_drv_attrs[] = {
4746 &driver_attr_delay.attr,
4747 &driver_attr_opts.attr,
4748 &driver_attr_ptype.attr,
4749 &driver_attr_dsense.attr,
4750 &driver_attr_fake_rw.attr,
4751 &driver_attr_no_lun_0.attr,
4752 &driver_attr_num_tgts.attr,
4753 &driver_attr_dev_size_mb.attr,
4754 &driver_attr_num_parts.attr,
4755 &driver_attr_every_nth.attr,
4756 &driver_attr_max_luns.attr,
4757 &driver_attr_max_queue.attr,
4758 &driver_attr_no_uld.attr,
4759 &driver_attr_scsi_level.attr,
4760 &driver_attr_virtual_gb.attr,
4761 &driver_attr_add_host.attr,
4762 &driver_attr_vpd_use_hostno.attr,
4763 &driver_attr_sector_size.attr,
4764 &driver_attr_dix.attr,
4765 &driver_attr_dif.attr,
4766 &driver_attr_guard.attr,
4767 &driver_attr_ato.attr,
4768 &driver_attr_map.attr,
4769 &driver_attr_removable.attr,
cbf67842
DG		 4770 &driver_attr_host_lock.attr,
4771 &driver_attr_ndelay.attr,
c2248fc9 4772 &driver_attr_strict.attr,
82069379
AM		 4773 NULL,
4774};
4775ATTRIBUTE_GROUPS(sdebug_drv);
1da177e4 4776
11ddceca 4777static struct device *pseudo_primary;
8dea0d02 4778
1da177e4
LT		 4779static int __init scsi_debug_init(void)
4780{
5f2578e5 4781 unsigned long sz;
1da177e4
LT		 4782 int host_to_add;
4783 int k;
6ecaff7f 4784 int ret;
1da177e4 4785
cbf67842
DG		 4786 atomic_set(&sdebug_cmnd_count, 0);
4787 atomic_set(&sdebug_completions, 0);
4788 atomic_set(&retired_max_queue, 0);
4789
4790 if (scsi_debug_ndelay >= 1000000000) {
4791 pr_warn("%s: ndelay must be less than 1 second, ignored\n",
4792 __func__);
4793 scsi_debug_ndelay = 0;
4794 } else if (scsi_debug_ndelay > 0)
4795 scsi_debug_delay = DELAY_OVERRIDDEN;
4796
597136ab
MP		 4797 switch (scsi_debug_sector_size) {
4798 case 512:
4799 case 1024:
4800 case 2048:
4801 case 4096:
4802 break;
4803 default:
cbf67842 4804 pr_err("%s: invalid sector_size %d\n", __func__,
597136ab
MP		 4805 scsi_debug_sector_size);
4806 return -EINVAL;
4807 }
4808
c6a44287
MP		 4809 switch (scsi_debug_dif) {
4810
4811 case SD_DIF_TYPE0_PROTECTION:
4812 case SD_DIF_TYPE1_PROTECTION:
395cef03 4813 case SD_DIF_TYPE2_PROTECTION:
c6a44287
MP		 4814 case SD_DIF_TYPE3_PROTECTION:
4815 break;
4816
4817 default:
cbf67842 4818 pr_err("%s: dif must be 0, 1, 2 or 3\n", __func__);
c6a44287
MP		 4819 return -EINVAL;
4820 }
4821
4822 if (scsi_debug_guard > 1) {
cbf67842 4823 pr_err("%s: guard must be 0 or 1\n", __func__);
c6a44287
MP		 4824 return -EINVAL;
4825 }
4826
4827 if (scsi_debug_ato > 1) {
cbf67842 4828 pr_err("%s: ato must be 0 or 1\n", __func__);
c6a44287
MP		 4829 return -EINVAL;
4830 }
4831
ea61fca5 4832 if (scsi_debug_physblk_exp > 15) {
cbf67842 4833 pr_err("%s: invalid physblk_exp %u\n", __func__,
ea61fca5
MP		 4834 scsi_debug_physblk_exp);
4835 return -EINVAL;
4836 }
4837
4838 if (scsi_debug_lowest_aligned > 0x3fff) {
cbf67842 4839 pr_err("%s: lowest_aligned too big: %u\n", __func__,
ea61fca5
MP		 4840 scsi_debug_lowest_aligned);
4841 return -EINVAL;
4842 }
4843
1da177e4
LT		 4844 if (scsi_debug_dev_size_mb < 1)
4845 scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
5f2578e5 4846 sz = (unsigned long)scsi_debug_dev_size_mb * 1048576;
597136ab 4847 sdebug_store_sectors = sz / scsi_debug_sector_size;
28898873 4848 sdebug_capacity = get_sdebug_capacity();
1da177e4
LT		 4849
4850 /* play around with geometry, don't waste too much on track 0 */
4851 sdebug_heads = 8;
4852 sdebug_sectors_per = 32;
4853 if (scsi_debug_dev_size_mb >= 16)
4854 sdebug_heads = 32;
4855 else if (scsi_debug_dev_size_mb >= 256)
4856 sdebug_heads = 64;
4857 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
4858 (sdebug_sectors_per * sdebug_heads);
4859 if (sdebug_cylinders_per >= 1024) {
4860 /* other LLDs do this; implies >= 1GB ram disk ... */
4861 sdebug_heads = 255;
4862 sdebug_sectors_per = 63;
4863 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
4864 (sdebug_sectors_per * sdebug_heads);
4865 }
4866
cbf67842
DG		 4867 if (0 == scsi_debug_fake_rw) {
4868 fake_storep = vmalloc(sz);
4869 if (NULL == fake_storep) {
4870 pr_err("%s: out of memory, 1\n", __func__);
4871 return -ENOMEM;
4872 }
4873 memset(fake_storep, 0, sz);
4874 if (scsi_debug_num_parts > 0)
4875 sdebug_build_parts(fake_storep, sz);
1da177e4 4876 }
1da177e4 4877
7cb69d03 4878 if (scsi_debug_dix) {
c6a44287
MP		 4879 int dif_size;
4880
4881 dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple);
4882 dif_storep = vmalloc(dif_size);
4883
cbf67842
DG		 4884 pr_err("%s: dif_storep %u bytes @ %p\n", __func__, dif_size,
4885 dif_storep);
c6a44287
MP		 4886
4887 if (dif_storep == NULL) {
cbf67842 4888 pr_err("%s: out of mem. (DIX)\n", __func__);
c6a44287
MP		 4889 ret = -ENOMEM;
4890 goto free_vm;
4891 }
4892
4893 memset(dif_storep, 0xff, dif_size);
4894 }
4895
5b94e232
MP		 4896 /* Logical Block Provisioning */
4897 if (scsi_debug_lbp()) {
6014759c
MP		 4898 scsi_debug_unmap_max_blocks =
4899 clamp(scsi_debug_unmap_max_blocks, 0U, 0xffffffffU);
4900
4901 scsi_debug_unmap_max_desc =
4902 clamp(scsi_debug_unmap_max_desc, 0U, 256U);
4903
4904 scsi_debug_unmap_granularity =
4905 clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU);
4906
4907 if (scsi_debug_unmap_alignment &&
ac17078a
AM		 4908 scsi_debug_unmap_granularity <=
4909 scsi_debug_unmap_alignment) {
cbf67842 4910 pr_err("%s: ERR: unmap_granularity <= unmap_alignment\n",
44d92694
MP		 4911 __func__);
4912 return -EINVAL;
4913 }
4914
b90ebc3d
AM		 4915 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
4916 map_storep = vmalloc(BITS_TO_LONGS(map_size) * sizeof(long));
44d92694 4917
cbf67842 4918 pr_info("%s: %lu provisioning blocks\n", __func__, map_size);
44d92694
MP		 4919
4920 if (map_storep == NULL) {
cbf67842 4921 pr_err("%s: out of mem. (MAP)\n", __func__);
44d92694
MP		 4922 ret = -ENOMEM;
4923 goto free_vm;
4924 }
4925
b90ebc3d 4926 bitmap_zero(map_storep, map_size);
44d92694
MP		 4927
4928 /* Map first 1KB for partition table */
4929 if (scsi_debug_num_parts)
4930 map_region(0, 2);
4931 }
4932
9b906779
NB		 4933 pseudo_primary = root_device_register("pseudo_0");
4934 if (IS_ERR(pseudo_primary)) {
cbf67842 4935 pr_warn("%s: root_device_register() error\n", __func__);
9b906779 4936 ret = PTR_ERR(pseudo_primary);
6ecaff7f
RD		 4937 goto free_vm;
4938 }
4939 ret = bus_register(&pseudo_lld_bus);
4940 if (ret < 0) {
cbf67842 4941 pr_warn("%s: bus_register error: %d\n", __func__, ret);
6ecaff7f
RD		 4942 goto dev_unreg;
4943 }
4944 ret = driver_register(&sdebug_driverfs_driver);
4945 if (ret < 0) {
cbf67842 4946 pr_warn("%s: driver_register error: %d\n", __func__, ret);
6ecaff7f
RD		 4947 goto bus_unreg;
4948 }
1da177e4 4949
1da177e4
LT		 4950 host_to_add = scsi_debug_add_host;
4951 scsi_debug_add_host = 0;
4952
4953 for (k = 0; k < host_to_add; k++) {
4954 if (sdebug_add_adapter()) {
cbf67842
DG		 4955 pr_err("%s: sdebug_add_adapter failed k=%d\n",
4956 __func__, k);
1da177e4
LT		 4957 break;
4958 }
4959 }
4960
4961 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
cbf67842
DG		 4962 pr_info("%s: built %d host(s)\n", __func__,
4963 scsi_debug_add_host);
1da177e4
LT		 4964 }
4965 return 0;
6ecaff7f 4966
6ecaff7f
RD		 4967bus_unreg:
4968 bus_unregister(&pseudo_lld_bus);
4969dev_unreg:
9b906779 4970 root_device_unregister(pseudo_primary);
6ecaff7f 4971free_vm:
44d92694
MP		 4972 if (map_storep)
4973 vfree(map_storep);
c6a44287
MP		 4974 if (dif_storep)
4975 vfree(dif_storep);
6ecaff7f
RD		 4976 vfree(fake_storep);
4977
4978 return ret;
1da177e4
LT		 4979}
4980
4981static void __exit scsi_debug_exit(void)
4982{
4983 int k = scsi_debug_add_host;
4984
4985 stop_all_queued();
cbf67842 4986 free_all_queued();
1da177e4
LT		 4987 for (; k; k--)
4988 sdebug_remove_adapter();
1da177e4
LT		 4989 driver_unregister(&sdebug_driverfs_driver);
4990 bus_unregister(&pseudo_lld_bus);
9b906779 4991 root_device_unregister(pseudo_primary);
1da177e4 4992
c6a44287
MP		 4993 if (dif_storep)
4994 vfree(dif_storep);
4995
1da177e4
LT		 4996 vfree(fake_storep);
4997}
4998
4999device_initcall(scsi_debug_init);
5000module_exit(scsi_debug_exit);
5001
1da177e4
LT		 5002static void sdebug_release_adapter(struct device * dev)
5003{
5004 struct sdebug_host_info *sdbg_host;
5005
5006 sdbg_host = to_sdebug_host(dev);
5007 kfree(sdbg_host);
5008}
5009
5010static int sdebug_add_adapter(void)
5011{
5012 int k, devs_per_host;
5013 int error = 0;
5014 struct sdebug_host_info *sdbg_host;
8b40228f 5015 struct sdebug_dev_info *sdbg_devinfo, *tmp;
1da177e4 5016
c65b1445 5017 sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL);
1da177e4
LT		 5018 if (NULL == sdbg_host) {
5019 printk(KERN_ERR "%s: out of memory at line %d\n",
cadbd4a5 5020 __func__, __LINE__);
1da177e4
LT		 5021 return -ENOMEM;
5022 }
5023
1da177e4
LT		 5024 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
5025
5026 devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns;
5027 for (k = 0; k < devs_per_host; k++) {
5cb2fc06
FT		 5028 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
5029 if (!sdbg_devinfo) {
1da177e4 5030 printk(KERN_ERR "%s: out of memory at line %d\n",
cadbd4a5 5031 __func__, __LINE__);
1da177e4
LT		 5032 error = -ENOMEM;
5033 goto clean;
5034 }
1da177e4
LT		 5035 }
5036
5037 spin_lock(&sdebug_host_list_lock);
5038 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
5039 spin_unlock(&sdebug_host_list_lock);
5040
5041 sdbg_host->dev.bus = &pseudo_lld_bus;
9b906779 5042 sdbg_host->dev.parent = pseudo_primary;
1da177e4 5043 sdbg_host->dev.release = &sdebug_release_adapter;
71610f55 5044 dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host);
1da177e4
LT		 5045
5046 error = device_register(&sdbg_host->dev);
5047
5048 if (error)
5049 goto clean;
5050
5051 ++scsi_debug_add_host;
5052 return error;
5053
5054clean:
8b40228f
FT		 5055 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
5056 dev_list) {
1da177e4
LT		 5057 list_del(&sdbg_devinfo->dev_list);
5058 kfree(sdbg_devinfo);
5059 }
5060
5061 kfree(sdbg_host);
5062 return error;
5063}
5064
5065static void sdebug_remove_adapter(void)
5066{
5067 struct sdebug_host_info * sdbg_host = NULL;
5068
5069 spin_lock(&sdebug_host_list_lock);
5070 if (!list_empty(&sdebug_host_list)) {
5071 sdbg_host = list_entry(sdebug_host_list.prev,
5072 struct sdebug_host_info, host_list);
5073 list_del(&sdbg_host->host_list);
5074 }
5075 spin_unlock(&sdebug_host_list_lock);
5076
5077 if (!sdbg_host)
5078 return;
5079
5080 device_unregister(&sdbg_host->dev);
5081 --scsi_debug_add_host;
5082}
5083
cbf67842 5084static int
db5ed4df 5085sdebug_change_qdepth(struct scsi_device *sdev, int qdepth)
cbf67842
DG		 5086{
5087 int num_in_q = 0;
cbf67842
DG		 5088 unsigned long iflags;
5089 struct sdebug_dev_info *devip;
5090
5091 spin_lock_irqsave(&queued_arr_lock, iflags);
5092 devip = (struct sdebug_dev_info *)sdev->hostdata;
5093 if (NULL == devip) {
5094 spin_unlock_irqrestore(&queued_arr_lock, iflags);
5095 return -ENODEV;
5096 }
5097 num_in_q = atomic_read(&devip->num_in_q);
5098 spin_unlock_irqrestore(&queued_arr_lock, iflags);
c40ecc12
CH		 5099
5100 if (qdepth < 1)
5101 qdepth = 1;
5102 /* allow to exceed max host queued_arr elements for testing */
5103 if (qdepth > SCSI_DEBUG_CANQUEUE + 10)
5104 qdepth = SCSI_DEBUG_CANQUEUE + 10;
db5ed4df 5105 scsi_change_queue_depth(sdev, qdepth);
c40ecc12 5106
cbf67842 5107 if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) {
c40ecc12
CH		 5108 sdev_printk(KERN_INFO, sdev,
5109 "%s: qdepth=%d, num_in_q=%d\n",
5110 __func__, qdepth, num_in_q);
cbf67842
DG		 5111 }
5112 return sdev->queue_depth;
5113}
5114
817fd66b
DG		 5115static int
5116check_inject(struct scsi_cmnd *scp)
5117{
5118 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
5119
5120 memset(ep, 0, sizeof(struct sdebug_scmd_extra_t));
5121
5122 if (atomic_inc_return(&sdebug_cmnd_count) >=
5123 abs(scsi_debug_every_nth)) {
5124 atomic_set(&sdebug_cmnd_count, 0);
5125 if (scsi_debug_every_nth < -1)
5126 scsi_debug_every_nth = -1;
5127 if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts)
5128 return 1; /* ignore command causing timeout */
5129 else if (SCSI_DEBUG_OPT_MAC_TIMEOUT & scsi_debug_opts &&
5130 scsi_medium_access_command(scp))
5131 return 1; /* time out reads and writes */
5132 if (sdebug_any_injecting_opt) {
5133 int opts = scsi_debug_opts;
5134
5135 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
5136 ep->inj_recovered = true;
5137 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
5138 ep->inj_transport = true;
5139 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
5140 ep->inj_dif = true;
5141 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
5142 ep->inj_dix = true;
5143 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
5144 ep->inj_short = true;
5145 }
5146 }
5147 return 0;
5148}
5149
c2248fc9
DG		 5150static int
5151scsi_debug_queuecommand(struct scsi_cmnd *scp)
5152{
5153 u8 sdeb_i;
5154 struct scsi_device *sdp = scp->device;
5155 const struct opcode_info_t *oip;
5156 const struct opcode_info_t *r_oip;
5157 struct sdebug_dev_info *devip;
5158 u8 *cmd = scp->cmnd;
5159 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
5160 int k, na;
5161 int errsts = 0;
5162 int errsts_no_connect = DID_NO_CONNECT << 16;
5163 u32 flags;
5164 u16 sa;
5165 u8 opcode = cmd[0];
5166 bool has_wlun_rl;
5167 bool debug = !!(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts);
5168
5169 scsi_set_resid(scp, 0);
5170 if (debug && !(SCSI_DEBUG_OPT_NO_CDB_NOISE & scsi_debug_opts)) {
5171 char b[120];
5172 int n, len, sb;
5173
5174 len = scp->cmd_len;
5175 sb = (int)sizeof(b);
5176 if (len > 32)
5177 strcpy(b, "too long, over 32 bytes");
5178 else {
5179 for (k = 0, n = 0; k < len && n < sb; ++k)
5180 n += scnprintf(b + n, sb - n, "%02x ",
5181 (u32)cmd[k]);
5182 }
5183 sdev_printk(KERN_INFO, sdp, "%s: cmd %s\n", my_name, b);
5184 }
5185 has_wlun_rl = (sdp->lun == SAM2_WLUN_REPORT_LUNS);
5186 if ((sdp->lun >= scsi_debug_max_luns) && !has_wlun_rl)
5187 return schedule_resp(scp, NULL, errsts_no_connect, 0);
5188
5189 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */
5190 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */
5191 devip = (struct sdebug_dev_info *)sdp->hostdata;
5192 if (!devip) {
5193 devip = devInfoReg(sdp);
5194 if (NULL == devip)
5195 return schedule_resp(scp, NULL, errsts_no_connect, 0);
5196 }
5197 na = oip->num_attached;
5198 r_pfp = oip->pfp;
5199 if (na) { /* multiple commands with this opcode */
5200 r_oip = oip;
5201 if (FF_SA & r_oip->flags) {
5202 if (F_SA_LOW & oip->flags)
5203 sa = 0x1f & cmd[1];
5204 else
5205 sa = get_unaligned_be16(cmd + 8);
5206 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5207 if (opcode == oip->opcode && sa == oip->sa)
5208 break;
5209 }
5210 } else { /* since no service action only check opcode */
5211 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5212 if (opcode == oip->opcode)
5213 break;
5214 }
5215 }
5216 if (k > na) {
5217 if (F_SA_LOW & r_oip->flags)
5218 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4);
5219 else if (F_SA_HIGH & r_oip->flags)
5220 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7);
5221 else
5222 mk_sense_invalid_opcode(scp);
5223 goto check_cond;
5224 }
5225 } /* else (when na==0) we assume the oip is a match */
5226 flags = oip->flags;
5227 if (F_INV_OP & flags) {
5228 mk_sense_invalid_opcode(scp);
5229 goto check_cond;
5230 }
5231 if (has_wlun_rl && !(F_RL_WLUN_OK & flags)) {
5232 if (debug)
5233 sdev_printk(KERN_INFO, sdp, "scsi_debug: Opcode: "
5234 "0x%x not supported for wlun\n", opcode);
5235 mk_sense_invalid_opcode(scp);
5236 goto check_cond;
5237 }
5238 if (scsi_debug_strict) { /* check cdb against mask */
5239 u8 rem;
5240 int j;
5241
5242 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) {
5243 rem = ~oip->len_mask[k] & cmd[k];
5244 if (rem) {
5245 for (j = 7; j >= 0; --j, rem <<= 1) {
5246 if (0x80 & rem)
5247 break;
5248 }
5249 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j);
5250 goto check_cond;
5251 }
5252 }
5253 }
5254 if (!(F_SKIP_UA & flags) &&
5255 SDEBUG_NUM_UAS != find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS)) {
5256 errsts = check_readiness(scp, UAS_ONLY, devip);
5257 if (errsts)
5258 goto check_cond;
5259 }
5260 if ((F_M_ACCESS & flags) && devip->stopped) {
5261 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2);
5262 if (debug)
5263 sdev_printk(KERN_INFO, sdp, "%s reports: Not ready: "
5264 "%s\n", my_name, "initializing command "
5265 "required");
5266 errsts = check_condition_result;
5267 goto fini;
5268 }
5269 if (scsi_debug_fake_rw && (F_FAKE_RW & flags))
5270 goto fini;
5271 if (scsi_debug_every_nth) {
5272 if (check_inject(scp))
5273 return 0; /* ignore command: make trouble */
5274 }
5275 if (oip->pfp) /* if this command has a resp_* function, call it */
5276 errsts = oip->pfp(scp, devip);
5277 else if (r_pfp) /* if leaf function ptr NULL, try the root's */
5278 errsts = r_pfp(scp, devip);
5279
5280fini:
5281 return schedule_resp(scp, devip, errsts,
5282 ((F_DELAY_OVERR & flags) ? 0 : scsi_debug_delay));
5283check_cond:
5284 return schedule_resp(scp, devip, check_condition_result, 0);
5285}
5286
38d5c833
DG		 5287static int
5288sdebug_queuecommand_lock_or_not(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
5289{
5290 if (scsi_debug_host_lock) {
5291 unsigned long iflags;
5292 int rc;
5293
5294 spin_lock_irqsave(shost->host_lock, iflags);
5295 rc = scsi_debug_queuecommand(cmd);
5296 spin_unlock_irqrestore(shost->host_lock, iflags);
5297 return rc;
5298 } else
5299 return scsi_debug_queuecommand(cmd);
5300}
5301
9e603ca0 5302static struct scsi_host_template sdebug_driver_template = {
c8ed555a
AV		 5303 .show_info = scsi_debug_show_info,
5304 .write_info = scsi_debug_write_info,
9e603ca0
FT		 5305 .proc_name = sdebug_proc_name,
5306 .name = "SCSI DEBUG",
5307 .info = scsi_debug_info,
5308 .slave_alloc = scsi_debug_slave_alloc,
5309 .slave_configure = scsi_debug_slave_configure,
5310 .slave_destroy = scsi_debug_slave_destroy,
5311 .ioctl = scsi_debug_ioctl,
cbf67842
DG		 5312 .queuecommand = sdebug_queuecommand_lock_or_not,
5313 .change_queue_depth = sdebug_change_qdepth,
9e603ca0 5314 .eh_abort_handler = scsi_debug_abort,
9e603ca0 5315 .eh_device_reset_handler = scsi_debug_device_reset,
cbf67842
DG		 5316 .eh_target_reset_handler = scsi_debug_target_reset,
5317 .eh_bus_reset_handler = scsi_debug_bus_reset,
9e603ca0 5318 .eh_host_reset_handler = scsi_debug_host_reset,
9e603ca0
FT		 5319 .can_queue = SCSI_DEBUG_CANQUEUE,
5320 .this_id = 7,
6bb5e6e7 5321 .sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS,
cbf67842 5322 .cmd_per_lun = DEF_CMD_PER_LUN,
6bb5e6e7 5323 .max_sectors = -1U,
9e603ca0
FT		 5324 .use_clustering = DISABLE_CLUSTERING,
5325 .module = THIS_MODULE,
c40ecc12 5326 .track_queue_depth = 1,
817fd66b 5327 .cmd_size = sizeof(struct sdebug_scmd_extra_t),
9e603ca0
FT		 5328};
5329
1da177e4
LT		 5330static int sdebug_driver_probe(struct device * dev)
5331{
22017ed2 5332 int error = 0;
817fd66b 5333 int opts;
22017ed2
DG		 5334 struct sdebug_host_info *sdbg_host;
5335 struct Scsi_Host *hpnt;
c6a44287 5336 int host_prot;
1da177e4
LT		 5337
5338 sdbg_host = to_sdebug_host(dev);
5339
78d4e5a0 5340 sdebug_driver_template.can_queue = scsi_debug_max_queue;
0759c666
AM		 5341 if (scsi_debug_clustering)
5342 sdebug_driver_template.use_clustering = ENABLE_CLUSTERING;
78d4e5a0
DG		 5343 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
5344 if (NULL == hpnt) {
17c9ff52 5345 pr_err("%s: scsi_host_alloc failed\n", __func__);
78d4e5a0 5346 error = -ENODEV;
1da177e4 5347 return error;
78d4e5a0 5348 }
1da177e4
LT		 5349
5350 sdbg_host->shost = hpnt;
5351 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
5352 if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id))
5353 hpnt->max_id = scsi_debug_num_tgts + 1;
5354 else
5355 hpnt->max_id = scsi_debug_num_tgts;
c65b1445 5356 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; /* = scsi_debug_max_luns; */
1da177e4 5357
c6a44287
MP		 5358 host_prot = 0;
5359
5360 switch (scsi_debug_dif) {
5361
5362 case SD_DIF_TYPE1_PROTECTION:
5363 host_prot = SHOST_DIF_TYPE1_PROTECTION;
5364 if (scsi_debug_dix)
5365 host_prot |= SHOST_DIX_TYPE1_PROTECTION;
5366 break;
5367
5368 case SD_DIF_TYPE2_PROTECTION:
5369 host_prot = SHOST_DIF_TYPE2_PROTECTION;
5370 if (scsi_debug_dix)
5371 host_prot |= SHOST_DIX_TYPE2_PROTECTION;
5372 break;
5373
5374 case SD_DIF_TYPE3_PROTECTION:
5375 host_prot = SHOST_DIF_TYPE3_PROTECTION;
5376 if (scsi_debug_dix)
5377 host_prot |= SHOST_DIX_TYPE3_PROTECTION;
5378 break;
5379
5380 default:
5381 if (scsi_debug_dix)
5382 host_prot |= SHOST_DIX_TYPE0_PROTECTION;
5383 break;
5384 }
5385
5386 scsi_host_set_prot(hpnt, host_prot);
5387
5388 printk(KERN_INFO "scsi_debug: host protection%s%s%s%s%s%s%s\n",
5389 (host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
5390 (host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
5391 (host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
5392 (host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
5393 (host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
5394 (host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
5395 (host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
5396
5397 if (scsi_debug_guard == 1)
5398 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
5399 else
5400 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
5401
817fd66b
DG		 5402 opts = scsi_debug_opts;
5403 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
5404 sdebug_any_injecting_opt = true;
5405 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
5406 sdebug_any_injecting_opt = true;
5407 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
5408 sdebug_any_injecting_opt = true;
5409 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
5410 sdebug_any_injecting_opt = true;
5411 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
5412 sdebug_any_injecting_opt = true;
5413
1da177e4
LT		 5414 error = scsi_add_host(hpnt, &sdbg_host->dev);
5415 if (error) {
cadbd4a5 5416 printk(KERN_ERR "%s: scsi_add_host failed\n", __func__);
1da177e4
LT		 5417 error = -ENODEV;
5418 scsi_host_put(hpnt);
5419 } else
5420 scsi_scan_host(hpnt);
5421
cbf67842 5422 return error;
1da177e4
LT		 5423}
5424
5425static int sdebug_driver_remove(struct device * dev)
5426{
1da177e4 5427 struct sdebug_host_info *sdbg_host;
8b40228f 5428 struct sdebug_dev_info *sdbg_devinfo, *tmp;
1da177e4
LT		 5429
5430 sdbg_host = to_sdebug_host(dev);
5431
5432 if (!sdbg_host) {
5433 printk(KERN_ERR "%s: Unable to locate host info\n",
cadbd4a5 5434 __func__);
1da177e4
LT		 5435 return -ENODEV;
5436 }
5437
5438 scsi_remove_host(sdbg_host->shost);
5439
8b40228f
FT		 5440 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
5441 dev_list) {
1da177e4
LT		 5442 list_del(&sdbg_devinfo->dev_list);
5443 kfree(sdbg_devinfo);
5444 }
5445
5446 scsi_host_put(sdbg_host->shost);
5447 return 0;
5448}
5449
8dea0d02
FT		 5450static int pseudo_lld_bus_match(struct device *dev,
5451 struct device_driver *dev_driver)
1da177e4 5452{
8dea0d02 5453 return 1;
1da177e4 5454}
8dea0d02
FT		 5455
5456static struct bus_type pseudo_lld_bus = {
5457 .name = "pseudo",
5458 .match = pseudo_lld_bus_match,
5459 .probe = sdebug_driver_probe,
5460 .remove = sdebug_driver_remove,
82069379 5461 .drv_groups = sdebug_drv_groups,
8dea0d02 5462};
Linux kernel - Deliverables
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