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1/*
2 * vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
3 * Copyright (C) 1992 Eric Youngdale
4 * Simulate a host adapter with 2 disks attached. Do a lot of checking
5 * to make sure that we are not getting blocks mixed up, and PANIC if
6 * anything out of the ordinary is seen.
7 * ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
8 *
9 * Copyright (C) 2001 - 2016 Douglas Gilbert
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2, or (at your option)
14 * any later version.
15 *
16 * For documentation see http://sg.danny.cz/sg/sdebug26.html
17 *
18 */
19
20
21#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
22
23#include <linux/module.h>
24
25#include <linux/kernel.h>
26#include <linux/errno.h>
27#include <linux/jiffies.h>
28#include <linux/slab.h>
29#include <linux/types.h>
30#include <linux/string.h>
31#include <linux/genhd.h>
32#include <linux/fs.h>
33#include <linux/init.h>
34#include <linux/proc_fs.h>
35#include <linux/vmalloc.h>
36#include <linux/moduleparam.h>
37#include <linux/scatterlist.h>
38#include <linux/blkdev.h>
39#include <linux/crc-t10dif.h>
40#include <linux/spinlock.h>
41#include <linux/interrupt.h>
42#include <linux/atomic.h>
43#include <linux/hrtimer.h>
44#include <linux/uuid.h>
45#include <linux/t10-pi.h>
46
47#include <net/checksum.h>
48
49#include <asm/unaligned.h>
50
51#include <scsi/scsi.h>
52#include <scsi/scsi_cmnd.h>
53#include <scsi/scsi_device.h>
54#include <scsi/scsi_host.h>
55#include <scsi/scsicam.h>
56#include <scsi/scsi_eh.h>
57#include <scsi/scsi_tcq.h>
58#include <scsi/scsi_dbg.h>
59
60#include "sd.h"
61#include "scsi_logging.h"
62
63/* make sure inq_product_rev string corresponds to this version */
64#define SDEBUG_VERSION "1.86"
65static const char *sdebug_version_date = "20160430";
66
67#define MY_NAME "scsi_debug"
68
69/* Additional Sense Code (ASC) */
70#define NO_ADDITIONAL_SENSE 0x0
71#define LOGICAL_UNIT_NOT_READY 0x4
72#define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
73#define UNRECOVERED_READ_ERR 0x11
74#define PARAMETER_LIST_LENGTH_ERR 0x1a
75#define INVALID_OPCODE 0x20
76#define LBA_OUT_OF_RANGE 0x21
77#define INVALID_FIELD_IN_CDB 0x24
78#define INVALID_FIELD_IN_PARAM_LIST 0x26
79#define UA_RESET_ASC 0x29
80#define UA_CHANGED_ASC 0x2a
81#define TARGET_CHANGED_ASC 0x3f
82#define LUNS_CHANGED_ASCQ 0x0e
83#define INSUFF_RES_ASC 0x55
84#define INSUFF_RES_ASCQ 0x3
85#define POWER_ON_RESET_ASCQ 0x0
86#define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */
87#define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */
88#define CAPACITY_CHANGED_ASCQ 0x9
89#define SAVING_PARAMS_UNSUP 0x39
90#define TRANSPORT_PROBLEM 0x4b
91#define THRESHOLD_EXCEEDED 0x5d
92#define LOW_POWER_COND_ON 0x5e
93#define MISCOMPARE_VERIFY_ASC 0x1d
94#define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */
95#define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16
96
97/* Additional Sense Code Qualifier (ASCQ) */
98#define ACK_NAK_TO 0x3
99
100/* Default values for driver parameters */
101#define DEF_NUM_HOST 1
102#define DEF_NUM_TGTS 1
103#define DEF_MAX_LUNS 1
104/* With these defaults, this driver will make 1 host with 1 target
105 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
106 */
107#define DEF_ATO 1
108#define DEF_JDELAY 1 /* if > 0 unit is a jiffy */
109#define DEF_DEV_SIZE_MB 8
110#define DEF_DIF 0
111#define DEF_DIX 0
112#define DEF_D_SENSE 0
113#define DEF_EVERY_NTH 0
114#define DEF_FAKE_RW 0
115#define DEF_GUARD 0
116#define DEF_HOST_LOCK 0
117#define DEF_LBPU 0
118#define DEF_LBPWS 0
119#define DEF_LBPWS10 0
120#define DEF_LBPRZ 1
121#define DEF_LOWEST_ALIGNED 0
122#define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */
123#define DEF_NO_LUN_0 0
124#define DEF_NUM_PARTS 0
125#define DEF_OPTS 0
126#define DEF_OPT_BLKS 1024
127#define DEF_PHYSBLK_EXP 0
128#define DEF_PTYPE TYPE_DISK
129#define DEF_REMOVABLE false
130#define DEF_SCSI_LEVEL 7 /* INQUIRY, byte2 [6->SPC-4; 7->SPC-5] */
131#define DEF_SECTOR_SIZE 512
132#define DEF_UNMAP_ALIGNMENT 0
133#define DEF_UNMAP_GRANULARITY 1
134#define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
135#define DEF_UNMAP_MAX_DESC 256
136#define DEF_VIRTUAL_GB 0
137#define DEF_VPD_USE_HOSTNO 1
138#define DEF_WRITESAME_LENGTH 0xFFFF
139#define DEF_STRICT 0
140#define DEF_STATISTICS false
141#define DEF_SUBMIT_QUEUES 1
142#define DEF_UUID_CTL 0
143#define JDELAY_OVERRIDDEN -9999
144
145#define SDEBUG_LUN_0_VAL 0
146
147/* bit mask values for sdebug_opts */
148#define SDEBUG_OPT_NOISE 1
149#define SDEBUG_OPT_MEDIUM_ERR 2
150#define SDEBUG_OPT_TIMEOUT 4
151#define SDEBUG_OPT_RECOVERED_ERR 8
152#define SDEBUG_OPT_TRANSPORT_ERR 16
153#define SDEBUG_OPT_DIF_ERR 32
154#define SDEBUG_OPT_DIX_ERR 64
155#define SDEBUG_OPT_MAC_TIMEOUT 128
156#define SDEBUG_OPT_SHORT_TRANSFER 0x100
157#define SDEBUG_OPT_Q_NOISE 0x200
158#define SDEBUG_OPT_ALL_TSF 0x400
159#define SDEBUG_OPT_RARE_TSF 0x800
160#define SDEBUG_OPT_N_WCE 0x1000
161#define SDEBUG_OPT_RESET_NOISE 0x2000
162#define SDEBUG_OPT_NO_CDB_NOISE 0x4000
163#define SDEBUG_OPT_ALL_NOISE (SDEBUG_OPT_NOISE | SDEBUG_OPT_Q_NOISE | \
164 SDEBUG_OPT_RESET_NOISE)
165#define SDEBUG_OPT_ALL_INJECTING (SDEBUG_OPT_RECOVERED_ERR | \
166 SDEBUG_OPT_TRANSPORT_ERR | \
167 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR | \
168 SDEBUG_OPT_SHORT_TRANSFER)
169/* When "every_nth" > 0 then modulo "every_nth" commands:
170 * - a missing response is simulated if SDEBUG_OPT_TIMEOUT is set
171 * - a RECOVERED_ERROR is simulated on successful read and write
172 * commands if SDEBUG_OPT_RECOVERED_ERR is set.
173 * - a TRANSPORT_ERROR is simulated on successful read and write
174 * commands if SDEBUG_OPT_TRANSPORT_ERR is set.
175 *
176 * When "every_nth" < 0 then after "- every_nth" commands:
177 * - a missing response is simulated if SDEBUG_OPT_TIMEOUT is set
178 * - a RECOVERED_ERROR is simulated on successful read and write
179 * commands if SDEBUG_OPT_RECOVERED_ERR is set.
180 * - a TRANSPORT_ERROR is simulated on successful read and write
181 * commands if _DEBUG_OPT_TRANSPORT_ERR is set.
182 * This will continue on every subsequent command until some other action
183 * occurs (e.g. the user * writing a new value (other than -1 or 1) to
184 * every_nth via sysfs).
185 */
186
187/* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs) are returned in
188 * priority order. In the subset implemented here lower numbers have higher
189 * priority. The UA numbers should be a sequence starting from 0 with
190 * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */
191#define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */
192#define SDEBUG_UA_BUS_RESET 1
193#define SDEBUG_UA_MODE_CHANGED 2
194#define SDEBUG_UA_CAPACITY_CHANGED 3
195#define SDEBUG_UA_LUNS_CHANGED 4
196#define SDEBUG_UA_MICROCODE_CHANGED 5 /* simulate firmware change */
197#define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 6
198#define SDEBUG_NUM_UAS 7
199
200/* when 1==SDEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
201 * sector on read commands: */
202#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
203#define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
204
205/* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
206 * or "peripheral device" addressing (value 0) */
207#define SAM2_LUN_ADDRESS_METHOD 0
208
209/* SDEBUG_CANQUEUE is the maximum number of commands that can be queued
210 * (for response) per submit queue at one time. Can be reduced by max_queue
211 * option. Command responses are not queued when jdelay=0 and ndelay=0. The
212 * per-device DEF_CMD_PER_LUN can be changed via sysfs:
213 * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth
214 * but cannot exceed SDEBUG_CANQUEUE .
215 */
216#define SDEBUG_CANQUEUE_WORDS 3 /* a WORD is bits in a long */
217#define SDEBUG_CANQUEUE (SDEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
218#define DEF_CMD_PER_LUN 255
219
220#define F_D_IN 1
221#define F_D_OUT 2
222#define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */
223#define F_D_UNKN 8
224#define F_RL_WLUN_OK 0x10
225#define F_SKIP_UA 0x20
226#define F_DELAY_OVERR 0x40
227#define F_SA_LOW 0x80 /* cdb byte 1, bits 4 to 0 */
228#define F_SA_HIGH 0x100 /* as used by variable length cdbs */
229#define F_INV_OP 0x200
230#define F_FAKE_RW 0x400
231#define F_M_ACCESS 0x800 /* media access */
232
233#define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR)
234#define FF_DIRECT_IO (F_M_ACCESS | F_FAKE_RW)
235#define FF_SA (F_SA_HIGH | F_SA_LOW)
236
237#define SDEBUG_MAX_PARTS 4
238
239#define SDEBUG_MAX_CMD_LEN 32
240
241
242struct sdebug_dev_info {
243 struct list_head dev_list;
244 unsigned int channel;
245 unsigned int target;
246 u64 lun;
247 uuid_be lu_name;
248 struct sdebug_host_info *sdbg_host;
249 unsigned long uas_bm[1];
250 atomic_t num_in_q;
251 atomic_t stopped;
252 bool used;
253};
254
255struct sdebug_host_info {
256 struct list_head host_list;
257 struct Scsi_Host *shost;
258 struct device dev;
259 struct list_head dev_info_list;
260};
261
262#define to_sdebug_host(d) \
263 container_of(d, struct sdebug_host_info, dev)
264
265struct sdebug_defer {
266 struct hrtimer hrt;
267 struct execute_work ew;
268 int sqa_idx; /* index of sdebug_queue array */
269 int qc_idx; /* index of sdebug_queued_cmd array within sqa_idx */
270 int issuing_cpu;
271};
272
273struct sdebug_queued_cmd {
274 /* corresponding bit set in in_use_bm[] in owning struct sdebug_queue
275 * instance indicates this slot is in use.
276 */
277 struct sdebug_defer *sd_dp;
278 struct scsi_cmnd *a_cmnd;
279 unsigned int inj_recovered:1;
280 unsigned int inj_transport:1;
281 unsigned int inj_dif:1;
282 unsigned int inj_dix:1;
283 unsigned int inj_short:1;
284};
285
286struct sdebug_queue {
287 struct sdebug_queued_cmd qc_arr[SDEBUG_CANQUEUE];
288 unsigned long in_use_bm[SDEBUG_CANQUEUE_WORDS];
289 spinlock_t qc_lock;
290 atomic_t blocked; /* to temporarily stop more being queued */
291};
292
293static atomic_t sdebug_cmnd_count; /* number of incoming commands */
294static atomic_t sdebug_completions; /* count of deferred completions */
295static atomic_t sdebug_miss_cpus; /* submission + completion cpus differ */
296static atomic_t sdebug_a_tsf; /* 'almost task set full' counter */
297
298struct opcode_info_t {
299 u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff */
300 /* for terminating element */
301 u8 opcode; /* if num_attached > 0, preferred */
302 u16 sa; /* service action */
303 u32 flags; /* OR-ed set of SDEB_F_* */
304 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
305 const struct opcode_info_t *arrp; /* num_attached elements or NULL */
306 u8 len_mask[16]; /* len=len_mask[0], then mask for cdb[1]... */
307 /* ignore cdb bytes after position 15 */
308};
309
310/* SCSI opcodes (first byte of cdb) of interest mapped onto these indexes */
311enum sdeb_opcode_index {
312 SDEB_I_INVALID_OPCODE = 0,
313 SDEB_I_INQUIRY = 1,
314 SDEB_I_REPORT_LUNS = 2,
315 SDEB_I_REQUEST_SENSE = 3,
316 SDEB_I_TEST_UNIT_READY = 4,
317 SDEB_I_MODE_SENSE = 5, /* 6, 10 */
318 SDEB_I_MODE_SELECT = 6, /* 6, 10 */
319 SDEB_I_LOG_SENSE = 7,
320 SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */
321 SDEB_I_READ = 9, /* 6, 10, 12, 16 */
322 SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */
323 SDEB_I_START_STOP = 11,
324 SDEB_I_SERV_ACT_IN = 12, /* 12, 16 */
325 SDEB_I_SERV_ACT_OUT = 13, /* 12, 16 */
326 SDEB_I_MAINT_IN = 14,
327 SDEB_I_MAINT_OUT = 15,
328 SDEB_I_VERIFY = 16, /* 10 only */
329 SDEB_I_VARIABLE_LEN = 17,
330 SDEB_I_RESERVE = 18, /* 6, 10 */
331 SDEB_I_RELEASE = 19, /* 6, 10 */
332 SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
333 SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */
334 SDEB_I_ATA_PT = 22, /* 12, 16 */
335 SDEB_I_SEND_DIAG = 23,
336 SDEB_I_UNMAP = 24,
337 SDEB_I_XDWRITEREAD = 25, /* 10 only */
338 SDEB_I_WRITE_BUFFER = 26,
339 SDEB_I_WRITE_SAME = 27, /* 10, 16 */
340 SDEB_I_SYNC_CACHE = 28, /* 10 only */
341 SDEB_I_COMP_WRITE = 29,
342 SDEB_I_LAST_ELEMENT = 30, /* keep this last */
343};
344
345
346static const unsigned char opcode_ind_arr[256] = {
347/* 0x0; 0x0->0x1f: 6 byte cdbs */
348 SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE,
349 0, 0, 0, 0,
350 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0,
351 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
352 SDEB_I_RELEASE,
353 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG,
354 SDEB_I_ALLOW_REMOVAL, 0,
355/* 0x20; 0x20->0x3f: 10 byte cdbs */
356 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0,
357 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY,
358 0, 0, 0, 0, 0, SDEB_I_SYNC_CACHE, 0, 0,
359 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0,
360/* 0x40; 0x40->0x5f: 10 byte cdbs */
361 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0,
362 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0,
363 0, 0, 0, SDEB_I_XDWRITEREAD, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
364 SDEB_I_RELEASE,
365 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0,
366/* 0x60; 0x60->0x7d are reserved, 0x7e is "extended cdb" */
367 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
368 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
369 0, SDEB_I_VARIABLE_LEN,
370/* 0x80; 0x80->0x9f: 16 byte cdbs */
371 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0,
372 SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0, 0, 0, 0, 0,
373 0, 0, 0, SDEB_I_WRITE_SAME, 0, 0, 0, 0,
374 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN, SDEB_I_SERV_ACT_OUT,
375/* 0xa0; 0xa0->0xbf: 12 byte cdbs */
376 SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN,
377 SDEB_I_MAINT_OUT, 0, 0, 0,
378 SDEB_I_READ, SDEB_I_SERV_ACT_OUT, SDEB_I_WRITE, SDEB_I_SERV_ACT_IN,
379 0, 0, 0, 0,
380 0, 0, 0, 0, 0, 0, 0, 0,
381 0, 0, 0, 0, 0, 0, 0, 0,
382/* 0xc0; 0xc0->0xff: vendor specific */
383 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
384 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
385 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
386 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
387};
388
389static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *);
390static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *);
391static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *);
392static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
393static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *);
394static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
395static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
396static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
397static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
398static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
399static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
400static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
401static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *);
402static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *);
403static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *);
404static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *);
405static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *);
406static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *);
407static int resp_xdwriteread_10(struct scsi_cmnd *, struct sdebug_dev_info *);
408static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
409static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *);
410
411static const struct opcode_info_t msense_iarr[1] = {
412 {0, 0x1a, 0, F_D_IN, NULL, NULL,
413 {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
414};
415
416static const struct opcode_info_t mselect_iarr[1] = {
417 {0, 0x15, 0, F_D_OUT, NULL, NULL,
418 {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
419};
420
421static const struct opcode_info_t read_iarr[3] = {
422 {0, 0x28, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL,/* READ(10) */
423 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
424 0, 0, 0, 0} },
425 {0, 0x8, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL, /* READ(6) */
426 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
427 {0, 0xa8, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL,/* READ(12) */
428 {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x9f,
429 0xc7, 0, 0, 0, 0} },
430};
431
432static const struct opcode_info_t write_iarr[3] = {
433 {0, 0x2a, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 10 */
434 {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
435 0, 0, 0, 0} },
436 {0, 0xa, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 6 */
437 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
438 {0, 0xaa, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 12 */
439 {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x9f,
440 0xc7, 0, 0, 0, 0} },
441};
442
443static const struct opcode_info_t sa_in_iarr[1] = {
444 {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL,
445 {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
446 0xff, 0xff, 0xff, 0, 0xc7} },
447};
448
449static const struct opcode_info_t vl_iarr[1] = { /* VARIABLE LENGTH */
450 {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_DIRECT_IO, resp_write_dt0,
451 NULL, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0xb, 0xfa,
452 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
453};
454
455static const struct opcode_info_t maint_in_iarr[2] = {
456 {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL,
457 {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
458 0xc7, 0, 0, 0, 0} },
459 {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL,
460 {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
461 0, 0} },
462};
463
464static const struct opcode_info_t write_same_iarr[1] = {
465 {0, 0x93, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, resp_write_same_16, NULL,
466 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
467 0xff, 0xff, 0xff, 0x1f, 0xc7} },
468};
469
470static const struct opcode_info_t reserve_iarr[1] = {
471 {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */
472 {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
473};
474
475static const struct opcode_info_t release_iarr[1] = {
476 {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */
477 {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
478};
479
480
481/* This array is accessed via SDEB_I_* values. Make sure all are mapped,
482 * plus the terminating elements for logic that scans this table such as
483 * REPORT SUPPORTED OPERATION CODES. */
484static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEMENT + 1] = {
485/* 0 */
486 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL,
487 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
488 {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL,
489 {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
490 {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL,
491 {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
492 0, 0} },
493 {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL,
494 {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
495 {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */
496 {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
497 {1, 0x5a, 0, F_D_IN, resp_mode_sense, msense_iarr,
498 {10, 0xf8, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
499 0} },
500 {1, 0x55, 0, F_D_OUT, resp_mode_select, mselect_iarr,
501 {10, 0xf1, 0, 0, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
502 {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL,
503 {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0,
504 0, 0, 0} },
505 {0, 0x25, 0, F_D_IN, resp_readcap, NULL,
506 {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0,
507 0, 0} },
508 {3, 0x88, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, read_iarr,
509 {16, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
510 0xff, 0xff, 0xff, 0x9f, 0xc7} }, /* READ(16) */
511/* 10 */
512 {3, 0x8a, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, write_iarr,
513 {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
514 0xff, 0xff, 0xff, 0x9f, 0xc7} }, /* WRITE(16) */
515 {0, 0x1b, 0, 0, resp_start_stop, NULL, /* START STOP UNIT */
516 {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
517 {1, 0x9e, 0x10, F_SA_LOW | F_D_IN, resp_readcap16, sa_in_iarr,
518 {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
519 0xff, 0xff, 0xff, 0x1, 0xc7} }, /* READ CAPACITY(16) */
520 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* SA OUT */
521 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
522 {2, 0xa3, 0xa, F_SA_LOW | F_D_IN, resp_report_tgtpgs, maint_in_iarr,
523 {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, 0,
524 0} },
525 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */
526 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
527 {0, 0x2f, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, NULL, NULL, /* VERIFY(10) */
528 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7,
529 0, 0, 0, 0, 0, 0} },
530 {1, 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_DIRECT_IO, resp_read_dt0,
531 vl_iarr, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0x9, 0xfe, 0,
532 0xff, 0xff, 0xff, 0xff} },/* VARIABLE LENGTH, READ(32) */
533 {1, 0x56, 0, F_D_OUT, NULL, reserve_iarr, /* RESERVE(10) */
534 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
535 0} },
536 {1, 0x57, 0, F_D_OUT, NULL, release_iarr, /* RELEASE(10) */
537 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
538 0} },
539/* 20 */
540 {0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */
541 {6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
542 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */
543 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
544 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */
545 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
546 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */
547 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
548 {0, 0x42, 0, F_D_OUT | FF_DIRECT_IO, resp_unmap, NULL, /* UNMAP */
549 {10, 0x1, 0, 0, 0, 0, 0x1f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
550 {0, 0x53, 0, F_D_IN | F_D_OUT | FF_DIRECT_IO, resp_xdwriteread_10,
551 NULL, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7,
552 0, 0, 0, 0, 0, 0} },
553 {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL,
554 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0,
555 0, 0, 0, 0} }, /* WRITE_BUFFER */
556 {1, 0x41, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, resp_write_same_10,
557 write_same_iarr, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff,
558 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
559 {0, 0x35, 0, F_DELAY_OVERR | FF_DIRECT_IO, NULL, NULL, /* SYNC_CACHE */
560 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
561 0, 0, 0, 0} },
562 {0, 0x89, 0, F_D_OUT | FF_DIRECT_IO, resp_comp_write, NULL,
563 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
564 0, 0xff, 0x1f, 0xc7} }, /* COMPARE AND WRITE */
565
566/* 30 */
567 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */
568 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
569};
570
571static int sdebug_add_host = DEF_NUM_HOST;
572static int sdebug_ato = DEF_ATO;
573static int sdebug_jdelay = DEF_JDELAY; /* if > 0 then unit is jiffies */
574static int sdebug_dev_size_mb = DEF_DEV_SIZE_MB;
575static int sdebug_dif = DEF_DIF;
576static int sdebug_dix = DEF_DIX;
577static int sdebug_dsense = DEF_D_SENSE;
578static int sdebug_every_nth = DEF_EVERY_NTH;
579static int sdebug_fake_rw = DEF_FAKE_RW;
580static unsigned int sdebug_guard = DEF_GUARD;
581static int sdebug_lowest_aligned = DEF_LOWEST_ALIGNED;
582static int sdebug_max_luns = DEF_MAX_LUNS;
583static int sdebug_max_queue = SDEBUG_CANQUEUE; /* per submit queue */
584static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */
585static int sdebug_ndelay = DEF_NDELAY; /* if > 0 then unit is nanoseconds */
586static int sdebug_no_lun_0 = DEF_NO_LUN_0;
587static int sdebug_no_uld;
588static int sdebug_num_parts = DEF_NUM_PARTS;
589static int sdebug_num_tgts = DEF_NUM_TGTS; /* targets per host */
590static int sdebug_opt_blks = DEF_OPT_BLKS;
591static int sdebug_opts = DEF_OPTS;
592static int sdebug_physblk_exp = DEF_PHYSBLK_EXP;
593static int sdebug_ptype = DEF_PTYPE; /* SCSI peripheral device type */
594static int sdebug_scsi_level = DEF_SCSI_LEVEL;
595static int sdebug_sector_size = DEF_SECTOR_SIZE;
596static int sdebug_virtual_gb = DEF_VIRTUAL_GB;
597static int sdebug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
598static unsigned int sdebug_lbpu = DEF_LBPU;
599static unsigned int sdebug_lbpws = DEF_LBPWS;
600static unsigned int sdebug_lbpws10 = DEF_LBPWS10;
601static unsigned int sdebug_lbprz = DEF_LBPRZ;
602static unsigned int sdebug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
603static unsigned int sdebug_unmap_granularity = DEF_UNMAP_GRANULARITY;
604static unsigned int sdebug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
605static unsigned int sdebug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
606static unsigned int sdebug_write_same_length = DEF_WRITESAME_LENGTH;
607static int sdebug_uuid_ctl = DEF_UUID_CTL;
608static bool sdebug_removable = DEF_REMOVABLE;
609static bool sdebug_clustering;
610static bool sdebug_host_lock = DEF_HOST_LOCK;
611static bool sdebug_strict = DEF_STRICT;
612static bool sdebug_any_injecting_opt;
613static bool sdebug_verbose;
614static bool have_dif_prot;
615static bool sdebug_statistics = DEF_STATISTICS;
616static bool sdebug_mq_active;
617
618static unsigned int sdebug_store_sectors;
619static sector_t sdebug_capacity; /* in sectors */
620
621/* old BIOS stuff, kernel may get rid of them but some mode sense pages
622 may still need them */
623static int sdebug_heads; /* heads per disk */
624static int sdebug_cylinders_per; /* cylinders per surface */
625static int sdebug_sectors_per; /* sectors per cylinder */
626
627static LIST_HEAD(sdebug_host_list);
628static DEFINE_SPINLOCK(sdebug_host_list_lock);
629
630static unsigned char *fake_storep; /* ramdisk storage */
631static struct t10_pi_tuple *dif_storep; /* protection info */
632static void *map_storep; /* provisioning map */
633
634static unsigned long map_size;
635static int num_aborts;
636static int num_dev_resets;
637static int num_target_resets;
638static int num_bus_resets;
639static int num_host_resets;
640static int dix_writes;
641static int dix_reads;
642static int dif_errors;
643
644static int submit_queues = DEF_SUBMIT_QUEUES; /* > 1 for multi-queue (mq) */
645static struct sdebug_queue *sdebug_q_arr; /* ptr to array of submit queues */
646
647static DEFINE_RWLOCK(atomic_rw);
648
649static char sdebug_proc_name[] = MY_NAME;
650static const char *my_name = MY_NAME;
651
652static struct bus_type pseudo_lld_bus;
653
654static struct device_driver sdebug_driverfs_driver = {
655 .name = sdebug_proc_name,
656 .bus = &pseudo_lld_bus,
657};
658
659static const int check_condition_result =
660 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
661
662static const int illegal_condition_result =
663 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
664
665static const int device_qfull_result =
666 (DID_OK << 16) | (COMMAND_COMPLETE << 8) | SAM_STAT_TASK_SET_FULL;
667
668
669/* Only do the extra work involved in logical block provisioning if one or
670 * more of the lbpu, lbpws or lbpws10 parameters are given and we are doing
671 * real reads and writes (i.e. not skipping them for speed).
672 */
673static inline bool scsi_debug_lbp(void)
674{
675 return 0 == sdebug_fake_rw &&
676 (sdebug_lbpu || sdebug_lbpws || sdebug_lbpws10);
677}
678
679static void *fake_store(unsigned long long lba)
680{
681 lba = do_div(lba, sdebug_store_sectors);
682
683 return fake_storep + lba * sdebug_sector_size;
684}
685
686static struct t10_pi_tuple *dif_store(sector_t sector)
687{
688 sector = sector_div(sector, sdebug_store_sectors);
689
690 return dif_storep + sector;
691}
692
693static void sdebug_max_tgts_luns(void)
694{
695 struct sdebug_host_info *sdbg_host;
696 struct Scsi_Host *hpnt;
697
698 spin_lock(&sdebug_host_list_lock);
699 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
700 hpnt = sdbg_host->shost;
701 if ((hpnt->this_id >= 0) &&
702 (sdebug_num_tgts > hpnt->this_id))
703 hpnt->max_id = sdebug_num_tgts + 1;
704 else
705 hpnt->max_id = sdebug_num_tgts;
706 /* sdebug_max_luns; */
707 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
708 }
709 spin_unlock(&sdebug_host_list_lock);
710}
711
712enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
713
714/* Set in_bit to -1 to indicate no bit position of invalid field */
715static void mk_sense_invalid_fld(struct scsi_cmnd *scp,
716 enum sdeb_cmd_data c_d,
717 int in_byte, int in_bit)
718{
719 unsigned char *sbuff;
720 u8 sks[4];
721 int sl, asc;
722
723 sbuff = scp->sense_buffer;
724 if (!sbuff) {
725 sdev_printk(KERN_ERR, scp->device,
726 "%s: sense_buffer is NULL\n", __func__);
727 return;
728 }
729 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
730 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
731 scsi_build_sense_buffer(sdebug_dsense, sbuff, ILLEGAL_REQUEST, asc, 0);
732 memset(sks, 0, sizeof(sks));
733 sks[0] = 0x80;
734 if (c_d)
735 sks[0] |= 0x40;
736 if (in_bit >= 0) {
737 sks[0] |= 0x8;
738 sks[0] |= 0x7 & in_bit;
739 }
740 put_unaligned_be16(in_byte, sks + 1);
741 if (sdebug_dsense) {
742 sl = sbuff[7] + 8;
743 sbuff[7] = sl;
744 sbuff[sl] = 0x2;
745 sbuff[sl + 1] = 0x6;
746 memcpy(sbuff + sl + 4, sks, 3);
747 } else
748 memcpy(sbuff + 15, sks, 3);
749 if (sdebug_verbose)
750 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
751 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
752 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
753}
754
755static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
756{
757 unsigned char *sbuff;
758
759 sbuff = scp->sense_buffer;
760 if (!sbuff) {
761 sdev_printk(KERN_ERR, scp->device,
762 "%s: sense_buffer is NULL\n", __func__);
763 return;
764 }
765 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
766
767 scsi_build_sense_buffer(sdebug_dsense, sbuff, key, asc, asq);
768
769 if (sdebug_verbose)
770 sdev_printk(KERN_INFO, scp->device,
771 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
772 my_name, key, asc, asq);
773}
774
775static void mk_sense_invalid_opcode(struct scsi_cmnd *scp)
776{
777 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
778}
779
780static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
781{
782 if (sdebug_verbose) {
783 if (0x1261 == cmd)
784 sdev_printk(KERN_INFO, dev,
785 "%s: BLKFLSBUF [0x1261]\n", __func__);
786 else if (0x5331 == cmd)
787 sdev_printk(KERN_INFO, dev,
788 "%s: CDROM_GET_CAPABILITY [0x5331]\n",
789 __func__);
790 else
791 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
792 __func__, cmd);
793 }
794 return -EINVAL;
795 /* return -ENOTTY; // correct return but upsets fdisk */
796}
797
798static void clear_luns_changed_on_target(struct sdebug_dev_info *devip)
799{
800 struct sdebug_host_info *sdhp;
801 struct sdebug_dev_info *dp;
802
803 spin_lock(&sdebug_host_list_lock);
804 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
805 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
806 if ((devip->sdbg_host == dp->sdbg_host) &&
807 (devip->target == dp->target))
808 clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
809 }
810 }
811 spin_unlock(&sdebug_host_list_lock);
812}
813
814static int make_ua(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
815{
816 int k;
817
818 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
819 if (k != SDEBUG_NUM_UAS) {
820 const char *cp = NULL;
821
822 switch (k) {
823 case SDEBUG_UA_POR:
824 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
825 POWER_ON_RESET_ASCQ);
826 if (sdebug_verbose)
827 cp = "power on reset";
828 break;
829 case SDEBUG_UA_BUS_RESET:
830 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
831 BUS_RESET_ASCQ);
832 if (sdebug_verbose)
833 cp = "bus reset";
834 break;
835 case SDEBUG_UA_MODE_CHANGED:
836 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
837 MODE_CHANGED_ASCQ);
838 if (sdebug_verbose)
839 cp = "mode parameters changed";
840 break;
841 case SDEBUG_UA_CAPACITY_CHANGED:
842 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
843 CAPACITY_CHANGED_ASCQ);
844 if (sdebug_verbose)
845 cp = "capacity data changed";
846 break;
847 case SDEBUG_UA_MICROCODE_CHANGED:
848 mk_sense_buffer(scp, UNIT_ATTENTION,
849 TARGET_CHANGED_ASC,
850 MICROCODE_CHANGED_ASCQ);
851 if (sdebug_verbose)
852 cp = "microcode has been changed";
853 break;
854 case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET:
855 mk_sense_buffer(scp, UNIT_ATTENTION,
856 TARGET_CHANGED_ASC,
857 MICROCODE_CHANGED_WO_RESET_ASCQ);
858 if (sdebug_verbose)
859 cp = "microcode has been changed without reset";
860 break;
861 case SDEBUG_UA_LUNS_CHANGED:
862 /*
863 * SPC-3 behavior is to report a UNIT ATTENTION with
864 * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN
865 * on the target, until a REPORT LUNS command is
866 * received. SPC-4 behavior is to report it only once.
867 * NOTE: sdebug_scsi_level does not use the same
868 * values as struct scsi_device->scsi_level.
869 */
870 if (sdebug_scsi_level >= 6) /* SPC-4 and above */
871 clear_luns_changed_on_target(devip);
872 mk_sense_buffer(scp, UNIT_ATTENTION,
873 TARGET_CHANGED_ASC,
874 LUNS_CHANGED_ASCQ);
875 if (sdebug_verbose)
876 cp = "reported luns data has changed";
877 break;
878 default:
879 pr_warn("unexpected unit attention code=%d\n", k);
880 if (sdebug_verbose)
881 cp = "unknown";
882 break;
883 }
884 clear_bit(k, devip->uas_bm);
885 if (sdebug_verbose)
886 sdev_printk(KERN_INFO, scp->device,
887 "%s reports: Unit attention: %s\n",
888 my_name, cp);
889 return check_condition_result;
890 }
891 return 0;
892}
893
894/* Build SCSI "data-in" buffer. Returns 0 if ok else (DID_ERROR << 16). */
895static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
896 int arr_len)
897{
898 int act_len;
899 struct scsi_data_buffer *sdb = scsi_in(scp);
900
901 if (!sdb->length)
902 return 0;
903 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
904 return DID_ERROR << 16;
905
906 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
907 arr, arr_len);
908 sdb->resid = scsi_bufflen(scp) - act_len;
909
910 return 0;
911}
912
913/* Partial build of SCSI "data-in" buffer. Returns 0 if ok else
914 * (DID_ERROR << 16). Can write to offset in data-in buffer. If multiple
915 * calls, not required to write in ascending offset order. Assumes resid
916 * set to scsi_bufflen() prior to any calls.
917 */
918static int p_fill_from_dev_buffer(struct scsi_cmnd *scp, const void *arr,
919 int arr_len, unsigned int off_dst)
920{
921 int act_len, n;
922 struct scsi_data_buffer *sdb = scsi_in(scp);
923 off_t skip = off_dst;
924
925 if (sdb->length <= off_dst)
926 return 0;
927 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
928 return DID_ERROR << 16;
929
930 act_len = sg_pcopy_from_buffer(sdb->table.sgl, sdb->table.nents,
931 arr, arr_len, skip);
932 pr_debug("%s: off_dst=%u, scsi_bufflen=%u, act_len=%u, resid=%d\n",
933 __func__, off_dst, scsi_bufflen(scp), act_len, sdb->resid);
934 n = (int)scsi_bufflen(scp) - ((int)off_dst + act_len);
935 sdb->resid = min(sdb->resid, n);
936 return 0;
937}
938
939/* Fetches from SCSI "data-out" buffer. Returns number of bytes fetched into
940 * 'arr' or -1 if error.
941 */
942static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
943 int arr_len)
944{
945 if (!scsi_bufflen(scp))
946 return 0;
947 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE))
948 return -1;
949
950 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
951}
952
953
954static const char * inq_vendor_id = "Linux ";
955static const char * inq_product_id = "scsi_debug ";
956static const char *inq_product_rev = "0186"; /* version less '.' */
957/* Use some locally assigned NAAs for SAS addresses. */
958static const u64 naa3_comp_a = 0x3222222000000000ULL;
959static const u64 naa3_comp_b = 0x3333333000000000ULL;
960static const u64 naa3_comp_c = 0x3111111000000000ULL;
961
962/* Device identification VPD page. Returns number of bytes placed in arr */
963static int inquiry_vpd_83(unsigned char *arr, int port_group_id,
964 int target_dev_id, int dev_id_num,
965 const char *dev_id_str, int dev_id_str_len,
966 const uuid_be *lu_name)
967{
968 int num, port_a;
969 char b[32];
970
971 port_a = target_dev_id + 1;
972 /* T10 vendor identifier field format (faked) */
973 arr[0] = 0x2; /* ASCII */
974 arr[1] = 0x1;
975 arr[2] = 0x0;
976 memcpy(&arr[4], inq_vendor_id, 8);
977 memcpy(&arr[12], inq_product_id, 16);
978 memcpy(&arr[28], dev_id_str, dev_id_str_len);
979 num = 8 + 16 + dev_id_str_len;
980 arr[3] = num;
981 num += 4;
982 if (dev_id_num >= 0) {
983 if (sdebug_uuid_ctl) {
984 /* Locally assigned UUID */
985 arr[num++] = 0x1; /* binary (not necessarily sas) */
986 arr[num++] = 0xa; /* PIV=0, lu, naa */
987 arr[num++] = 0x0;
988 arr[num++] = 0x12;
989 arr[num++] = 0x10; /* uuid type=1, locally assigned */
990 arr[num++] = 0x0;
991 memcpy(arr + num, lu_name, 16);
992 num += 16;
993 } else {
994 /* NAA-3, Logical unit identifier (binary) */
995 arr[num++] = 0x1; /* binary (not necessarily sas) */
996 arr[num++] = 0x3; /* PIV=0, lu, naa */
997 arr[num++] = 0x0;
998 arr[num++] = 0x8;
999 put_unaligned_be64(naa3_comp_b + dev_id_num, arr + num);
1000 num += 8;
1001 }
1002 /* Target relative port number */
1003 arr[num++] = 0x61; /* proto=sas, binary */
1004 arr[num++] = 0x94; /* PIV=1, target port, rel port */
1005 arr[num++] = 0x0; /* reserved */
1006 arr[num++] = 0x4; /* length */
1007 arr[num++] = 0x0; /* reserved */
1008 arr[num++] = 0x0; /* reserved */
1009 arr[num++] = 0x0;
1010 arr[num++] = 0x1; /* relative port A */
1011 }
1012 /* NAA-3, Target port identifier */
1013 arr[num++] = 0x61; /* proto=sas, binary */
1014 arr[num++] = 0x93; /* piv=1, target port, naa */
1015 arr[num++] = 0x0;
1016 arr[num++] = 0x8;
1017 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1018 num += 8;
1019 /* NAA-3, Target port group identifier */
1020 arr[num++] = 0x61; /* proto=sas, binary */
1021 arr[num++] = 0x95; /* piv=1, target port group id */
1022 arr[num++] = 0x0;
1023 arr[num++] = 0x4;
1024 arr[num++] = 0;
1025 arr[num++] = 0;
1026 put_unaligned_be16(port_group_id, arr + num);
1027 num += 2;
1028 /* NAA-3, Target device identifier */
1029 arr[num++] = 0x61; /* proto=sas, binary */
1030 arr[num++] = 0xa3; /* piv=1, target device, naa */
1031 arr[num++] = 0x0;
1032 arr[num++] = 0x8;
1033 put_unaligned_be64(naa3_comp_a + target_dev_id, arr + num);
1034 num += 8;
1035 /* SCSI name string: Target device identifier */
1036 arr[num++] = 0x63; /* proto=sas, UTF-8 */
1037 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
1038 arr[num++] = 0x0;
1039 arr[num++] = 24;
1040 memcpy(arr + num, "naa.32222220", 12);
1041 num += 12;
1042 snprintf(b, sizeof(b), "%08X", target_dev_id);
1043 memcpy(arr + num, b, 8);
1044 num += 8;
1045 memset(arr + num, 0, 4);
1046 num += 4;
1047 return num;
1048}
1049
1050static unsigned char vpd84_data[] = {
1051/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
1052 0x22,0x22,0x22,0x0,0xbb,0x1,
1053 0x22,0x22,0x22,0x0,0xbb,0x2,
1054};
1055
1056/* Software interface identification VPD page */
1057static int inquiry_vpd_84(unsigned char *arr)
1058{
1059 memcpy(arr, vpd84_data, sizeof(vpd84_data));
1060 return sizeof(vpd84_data);
1061}
1062
1063/* Management network addresses VPD page */
1064static int inquiry_vpd_85(unsigned char *arr)
1065{
1066 int num = 0;
1067 const char * na1 = "https://www.kernel.org/config";
1068 const char * na2 = "http://www.kernel.org/log";
1069 int plen, olen;
1070
1071 arr[num++] = 0x1; /* lu, storage config */
1072 arr[num++] = 0x0; /* reserved */
1073 arr[num++] = 0x0;
1074 olen = strlen(na1);
1075 plen = olen + 1;
1076 if (plen % 4)
1077 plen = ((plen / 4) + 1) * 4;
1078 arr[num++] = plen; /* length, null termianted, padded */
1079 memcpy(arr + num, na1, olen);
1080 memset(arr + num + olen, 0, plen - olen);
1081 num += plen;
1082
1083 arr[num++] = 0x4; /* lu, logging */
1084 arr[num++] = 0x0; /* reserved */
1085 arr[num++] = 0x0;
1086 olen = strlen(na2);
1087 plen = olen + 1;
1088 if (plen % 4)
1089 plen = ((plen / 4) + 1) * 4;
1090 arr[num++] = plen; /* length, null terminated, padded */
1091 memcpy(arr + num, na2, olen);
1092 memset(arr + num + olen, 0, plen - olen);
1093 num += plen;
1094
1095 return num;
1096}
1097
1098/* SCSI ports VPD page */
1099static int inquiry_vpd_88(unsigned char *arr, int target_dev_id)
1100{
1101 int num = 0;
1102 int port_a, port_b;
1103
1104 port_a = target_dev_id + 1;
1105 port_b = port_a + 1;
1106 arr[num++] = 0x0; /* reserved */
1107 arr[num++] = 0x0; /* reserved */
1108 arr[num++] = 0x0;
1109 arr[num++] = 0x1; /* relative port 1 (primary) */
1110 memset(arr + num, 0, 6);
1111 num += 6;
1112 arr[num++] = 0x0;
1113 arr[num++] = 12; /* length tp descriptor */
1114 /* naa-5 target port identifier (A) */
1115 arr[num++] = 0x61; /* proto=sas, binary */
1116 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1117 arr[num++] = 0x0; /* reserved */
1118 arr[num++] = 0x8; /* length */
1119 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1120 num += 8;
1121 arr[num++] = 0x0; /* reserved */
1122 arr[num++] = 0x0; /* reserved */
1123 arr[num++] = 0x0;
1124 arr[num++] = 0x2; /* relative port 2 (secondary) */
1125 memset(arr + num, 0, 6);
1126 num += 6;
1127 arr[num++] = 0x0;
1128 arr[num++] = 12; /* length tp descriptor */
1129 /* naa-5 target port identifier (B) */
1130 arr[num++] = 0x61; /* proto=sas, binary */
1131 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1132 arr[num++] = 0x0; /* reserved */
1133 arr[num++] = 0x8; /* length */
1134 put_unaligned_be64(naa3_comp_a + port_b, arr + num);
1135 num += 8;
1136
1137 return num;
1138}
1139
1140
1141static unsigned char vpd89_data[] = {
1142/* from 4th byte */ 0,0,0,0,
1143'l','i','n','u','x',' ',' ',' ',
1144'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
1145'1','2','3','4',
11460x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
11470xec,0,0,0,
11480x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
11490,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
11500x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
11510x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
11520x53,0x41,
11530x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
11540x20,0x20,
11550x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
11560x10,0x80,
11570,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
11580x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
11590x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
11600,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
11610x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
11620x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
11630,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
11640,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11650,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11660,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11670x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
11680,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
11690xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
11700,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
11710,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11720,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11730,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11740,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11750,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11760,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11770,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11780,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11790,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11800,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11810,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11820,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
1183};
1184
1185/* ATA Information VPD page */
1186static int inquiry_vpd_89(unsigned char *arr)
1187{
1188 memcpy(arr, vpd89_data, sizeof(vpd89_data));
1189 return sizeof(vpd89_data);
1190}
1191
1192
1193static unsigned char vpdb0_data[] = {
1194 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
1195 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1196 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1197 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1198};
1199
1200/* Block limits VPD page (SBC-3) */
1201static int inquiry_vpd_b0(unsigned char *arr)
1202{
1203 unsigned int gran;
1204
1205 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
1206
1207 /* Optimal transfer length granularity */
1208 gran = 1 << sdebug_physblk_exp;
1209 put_unaligned_be16(gran, arr + 2);
1210
1211 /* Maximum Transfer Length */
1212 if (sdebug_store_sectors > 0x400)
1213 put_unaligned_be32(sdebug_store_sectors, arr + 4);
1214
1215 /* Optimal Transfer Length */
1216 put_unaligned_be32(sdebug_opt_blks, &arr[8]);
1217
1218 if (sdebug_lbpu) {
1219 /* Maximum Unmap LBA Count */
1220 put_unaligned_be32(sdebug_unmap_max_blocks, &arr[16]);
1221
1222 /* Maximum Unmap Block Descriptor Count */
1223 put_unaligned_be32(sdebug_unmap_max_desc, &arr[20]);
1224 }
1225
1226 /* Unmap Granularity Alignment */
1227 if (sdebug_unmap_alignment) {
1228 put_unaligned_be32(sdebug_unmap_alignment, &arr[28]);
1229 arr[28] |= 0x80; /* UGAVALID */
1230 }
1231
1232 /* Optimal Unmap Granularity */
1233 put_unaligned_be32(sdebug_unmap_granularity, &arr[24]);
1234
1235 /* Maximum WRITE SAME Length */
1236 put_unaligned_be64(sdebug_write_same_length, &arr[32]);
1237
1238 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
1239
1240 return sizeof(vpdb0_data);
1241}
1242
1243/* Block device characteristics VPD page (SBC-3) */
1244static int inquiry_vpd_b1(unsigned char *arr)
1245{
1246 memset(arr, 0, 0x3c);
1247 arr[0] = 0;
1248 arr[1] = 1; /* non rotating medium (e.g. solid state) */
1249 arr[2] = 0;
1250 arr[3] = 5; /* less than 1.8" */
1251
1252 return 0x3c;
1253}
1254
1255/* Logical block provisioning VPD page (SBC-4) */
1256static int inquiry_vpd_b2(unsigned char *arr)
1257{
1258 memset(arr, 0, 0x4);
1259 arr[0] = 0; /* threshold exponent */
1260 if (sdebug_lbpu)
1261 arr[1] = 1 << 7;
1262 if (sdebug_lbpws)
1263 arr[1] |= 1 << 6;
1264 if (sdebug_lbpws10)
1265 arr[1] |= 1 << 5;
1266 if (sdebug_lbprz && scsi_debug_lbp())
1267 arr[1] |= (sdebug_lbprz & 0x7) << 2; /* sbc4r07 and later */
1268 /* anc_sup=0; dp=0 (no provisioning group descriptor) */
1269 /* minimum_percentage=0; provisioning_type=0 (unknown) */
1270 /* threshold_percentage=0 */
1271 return 0x4;
1272}
1273
1274#define SDEBUG_LONG_INQ_SZ 96
1275#define SDEBUG_MAX_INQ_ARR_SZ 584
1276
1277static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1278{
1279 unsigned char pq_pdt;
1280 unsigned char * arr;
1281 unsigned char *cmd = scp->cmnd;
1282 int alloc_len, n, ret;
1283 bool have_wlun, is_disk;
1284
1285 alloc_len = get_unaligned_be16(cmd + 3);
1286 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
1287 if (! arr)
1288 return DID_REQUEUE << 16;
1289 is_disk = (sdebug_ptype == TYPE_DISK);
1290 have_wlun = scsi_is_wlun(scp->device->lun);
1291 if (have_wlun)
1292 pq_pdt = TYPE_WLUN; /* present, wlun */
1293 else if (sdebug_no_lun_0 && (devip->lun == SDEBUG_LUN_0_VAL))
1294 pq_pdt = 0x7f; /* not present, PQ=3, PDT=0x1f */
1295 else
1296 pq_pdt = (sdebug_ptype & 0x1f);
1297 arr[0] = pq_pdt;
1298 if (0x2 & cmd[1]) { /* CMDDT bit set */
1299 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
1300 kfree(arr);
1301 return check_condition_result;
1302 } else if (0x1 & cmd[1]) { /* EVPD bit set */
1303 int lu_id_num, port_group_id, target_dev_id, len;
1304 char lu_id_str[6];
1305 int host_no = devip->sdbg_host->shost->host_no;
1306
1307 port_group_id = (((host_no + 1) & 0x7f) << 8) +
1308 (devip->channel & 0x7f);
1309 if (sdebug_vpd_use_hostno == 0)
1310 host_no = 0;
1311 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) +
1312 (devip->target * 1000) + devip->lun);
1313 target_dev_id = ((host_no + 1) * 2000) +
1314 (devip->target * 1000) - 3;
1315 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
1316 if (0 == cmd[2]) { /* supported vital product data pages */
1317 arr[1] = cmd[2]; /*sanity */
1318 n = 4;
1319 arr[n++] = 0x0; /* this page */
1320 arr[n++] = 0x80; /* unit serial number */
1321 arr[n++] = 0x83; /* device identification */
1322 arr[n++] = 0x84; /* software interface ident. */
1323 arr[n++] = 0x85; /* management network addresses */
1324 arr[n++] = 0x86; /* extended inquiry */
1325 arr[n++] = 0x87; /* mode page policy */
1326 arr[n++] = 0x88; /* SCSI ports */
1327 if (is_disk) { /* SBC only */
1328 arr[n++] = 0x89; /* ATA information */
1329 arr[n++] = 0xb0; /* Block limits */
1330 arr[n++] = 0xb1; /* Block characteristics */
1331 arr[n++] = 0xb2; /* Logical Block Prov */
1332 }
1333 arr[3] = n - 4; /* number of supported VPD pages */
1334 } else if (0x80 == cmd[2]) { /* unit serial number */
1335 arr[1] = cmd[2]; /*sanity */
1336 arr[3] = len;
1337 memcpy(&arr[4], lu_id_str, len);
1338 } else if (0x83 == cmd[2]) { /* device identification */
1339 arr[1] = cmd[2]; /*sanity */
1340 arr[3] = inquiry_vpd_83(&arr[4], port_group_id,
1341 target_dev_id, lu_id_num,
1342 lu_id_str, len,
1343 &devip->lu_name);
1344 } else if (0x84 == cmd[2]) { /* Software interface ident. */
1345 arr[1] = cmd[2]; /*sanity */
1346 arr[3] = inquiry_vpd_84(&arr[4]);
1347 } else if (0x85 == cmd[2]) { /* Management network addresses */
1348 arr[1] = cmd[2]; /*sanity */
1349 arr[3] = inquiry_vpd_85(&arr[4]);
1350 } else if (0x86 == cmd[2]) { /* extended inquiry */
1351 arr[1] = cmd[2]; /*sanity */
1352 arr[3] = 0x3c; /* number of following entries */
1353 if (sdebug_dif == T10_PI_TYPE3_PROTECTION)
1354 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
1355 else if (have_dif_prot)
1356 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
1357 else
1358 arr[4] = 0x0; /* no protection stuff */
1359 arr[5] = 0x7; /* head of q, ordered + simple q's */
1360 } else if (0x87 == cmd[2]) { /* mode page policy */
1361 arr[1] = cmd[2]; /*sanity */
1362 arr[3] = 0x8; /* number of following entries */
1363 arr[4] = 0x2; /* disconnect-reconnect mp */
1364 arr[6] = 0x80; /* mlus, shared */
1365 arr[8] = 0x18; /* protocol specific lu */
1366 arr[10] = 0x82; /* mlus, per initiator port */
1367 } else if (0x88 == cmd[2]) { /* SCSI Ports */
1368 arr[1] = cmd[2]; /*sanity */
1369 arr[3] = inquiry_vpd_88(&arr[4], target_dev_id);
1370 } else if (is_disk && 0x89 == cmd[2]) { /* ATA information */
1371 arr[1] = cmd[2]; /*sanity */
1372 n = inquiry_vpd_89(&arr[4]);
1373 put_unaligned_be16(n, arr + 2);
1374 } else if (is_disk && 0xb0 == cmd[2]) { /* Block limits */
1375 arr[1] = cmd[2]; /*sanity */
1376 arr[3] = inquiry_vpd_b0(&arr[4]);
1377 } else if (is_disk && 0xb1 == cmd[2]) { /* Block char. */
1378 arr[1] = cmd[2]; /*sanity */
1379 arr[3] = inquiry_vpd_b1(&arr[4]);
1380 } else if (is_disk && 0xb2 == cmd[2]) { /* LB Prov. */
1381 arr[1] = cmd[2]; /*sanity */
1382 arr[3] = inquiry_vpd_b2(&arr[4]);
1383 } else {
1384 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
1385 kfree(arr);
1386 return check_condition_result;
1387 }
1388 len = min(get_unaligned_be16(arr + 2) + 4, alloc_len);
1389 ret = fill_from_dev_buffer(scp, arr,
1390 min(len, SDEBUG_MAX_INQ_ARR_SZ));
1391 kfree(arr);
1392 return ret;
1393 }
1394 /* drops through here for a standard inquiry */
1395 arr[1] = sdebug_removable ? 0x80 : 0; /* Removable disk */
1396 arr[2] = sdebug_scsi_level;
1397 arr[3] = 2; /* response_data_format==2 */
1398 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
1399 arr[5] = (int)have_dif_prot; /* PROTECT bit */
1400 if (sdebug_vpd_use_hostno == 0)
1401 arr[5] = 0x10; /* claim: implicit TGPS */
1402 arr[6] = 0x10; /* claim: MultiP */
1403 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
1404 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
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 */
1409 put_unaligned_be16(0xc0, arr + 58); /* SAM-6 no version claimed */
1410 put_unaligned_be16(0x5c0, arr + 60); /* SPC-5 no version claimed */
1411 n = 62;
1412 if (is_disk) { /* SBC-4 no version claimed */
1413 put_unaligned_be16(0x600, arr + n);
1414 n += 2;
1415 } else if (sdebug_ptype == TYPE_TAPE) { /* SSC-4 rev 3 */
1416 put_unaligned_be16(0x525, arr + n);
1417 n += 2;
1418 }
1419 put_unaligned_be16(0x2100, arr + n); /* SPL-4 no version claimed */
1420 ret = fill_from_dev_buffer(scp, arr,
1421 min(alloc_len, SDEBUG_LONG_INQ_SZ));
1422 kfree(arr);
1423 return ret;
1424}
1425
1426static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1427 0, 0, 0x0, 0x0};
1428
1429static int resp_requests(struct scsi_cmnd * scp,
1430 struct sdebug_dev_info * devip)
1431{
1432 unsigned char * sbuff;
1433 unsigned char *cmd = scp->cmnd;
1434 unsigned char arr[SCSI_SENSE_BUFFERSIZE];
1435 bool dsense;
1436 int len = 18;
1437
1438 memset(arr, 0, sizeof(arr));
1439 dsense = !!(cmd[1] & 1);
1440 sbuff = scp->sense_buffer;
1441 if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
1442 if (dsense) {
1443 arr[0] = 0x72;
1444 arr[1] = 0x0; /* NO_SENSE in sense_key */
1445 arr[2] = THRESHOLD_EXCEEDED;
1446 arr[3] = 0xff; /* TEST set and MRIE==6 */
1447 len = 8;
1448 } else {
1449 arr[0] = 0x70;
1450 arr[2] = 0x0; /* NO_SENSE in sense_key */
1451 arr[7] = 0xa; /* 18 byte sense buffer */
1452 arr[12] = THRESHOLD_EXCEEDED;
1453 arr[13] = 0xff; /* TEST set and MRIE==6 */
1454 }
1455 } else {
1456 memcpy(arr, sbuff, SCSI_SENSE_BUFFERSIZE);
1457 if (arr[0] >= 0x70 && dsense == sdebug_dsense)
1458 ; /* have sense and formats match */
1459 else if (arr[0] <= 0x70) {
1460 if (dsense) {
1461 memset(arr, 0, 8);
1462 arr[0] = 0x72;
1463 len = 8;
1464 } else {
1465 memset(arr, 0, 18);
1466 arr[0] = 0x70;
1467 arr[7] = 0xa;
1468 }
1469 } else if (dsense) {
1470 memset(arr, 0, 8);
1471 arr[0] = 0x72;
1472 arr[1] = sbuff[2]; /* sense key */
1473 arr[2] = sbuff[12]; /* asc */
1474 arr[3] = sbuff[13]; /* ascq */
1475 len = 8;
1476 } else {
1477 memset(arr, 0, 18);
1478 arr[0] = 0x70;
1479 arr[2] = sbuff[1];
1480 arr[7] = 0xa;
1481 arr[12] = sbuff[1];
1482 arr[13] = sbuff[3];
1483 }
1484
1485 }
1486 mk_sense_buffer(scp, 0, NO_ADDITIONAL_SENSE, 0);
1487 return fill_from_dev_buffer(scp, arr, len);
1488}
1489
1490static int resp_start_stop(struct scsi_cmnd * scp,
1491 struct sdebug_dev_info * devip)
1492{
1493 unsigned char *cmd = scp->cmnd;
1494 int power_cond, stop;
1495
1496 power_cond = (cmd[4] & 0xf0) >> 4;
1497 if (power_cond) {
1498 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
1499 return check_condition_result;
1500 }
1501 stop = !(cmd[4] & 1);
1502 atomic_xchg(&devip->stopped, stop);
1503 return 0;
1504}
1505
1506static sector_t get_sdebug_capacity(void)
1507{
1508 static const unsigned int gibibyte = 1073741824;
1509
1510 if (sdebug_virtual_gb > 0)
1511 return (sector_t)sdebug_virtual_gb *
1512 (gibibyte / sdebug_sector_size);
1513 else
1514 return sdebug_store_sectors;
1515}
1516
1517#define SDEBUG_READCAP_ARR_SZ 8
1518static int resp_readcap(struct scsi_cmnd * scp,
1519 struct sdebug_dev_info * devip)
1520{
1521 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
1522 unsigned int capac;
1523
1524 /* following just in case virtual_gb changed */
1525 sdebug_capacity = get_sdebug_capacity();
1526 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
1527 if (sdebug_capacity < 0xffffffff) {
1528 capac = (unsigned int)sdebug_capacity - 1;
1529 put_unaligned_be32(capac, arr + 0);
1530 } else
1531 put_unaligned_be32(0xffffffff, arr + 0);
1532 put_unaligned_be16(sdebug_sector_size, arr + 6);
1533 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1534}
1535
1536#define SDEBUG_READCAP16_ARR_SZ 32
1537static int resp_readcap16(struct scsi_cmnd * scp,
1538 struct sdebug_dev_info * devip)
1539{
1540 unsigned char *cmd = scp->cmnd;
1541 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
1542 int alloc_len;
1543
1544 alloc_len = get_unaligned_be32(cmd + 10);
1545 /* following just in case virtual_gb changed */
1546 sdebug_capacity = get_sdebug_capacity();
1547 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
1548 put_unaligned_be64((u64)(sdebug_capacity - 1), arr + 0);
1549 put_unaligned_be32(sdebug_sector_size, arr + 8);
1550 arr[13] = sdebug_physblk_exp & 0xf;
1551 arr[14] = (sdebug_lowest_aligned >> 8) & 0x3f;
1552
1553 if (scsi_debug_lbp()) {
1554 arr[14] |= 0x80; /* LBPME */
1555 /* from sbc4r07, this LBPRZ field is 1 bit, but the LBPRZ in
1556 * the LB Provisioning VPD page is 3 bits. Note that lbprz=2
1557 * in the wider field maps to 0 in this field.
1558 */
1559 if (sdebug_lbprz & 1) /* precisely what the draft requires */
1560 arr[14] |= 0x40;
1561 }
1562
1563 arr[15] = sdebug_lowest_aligned & 0xff;
1564
1565 if (have_dif_prot) {
1566 arr[12] = (sdebug_dif - 1) << 1; /* P_TYPE */
1567 arr[12] |= 1; /* PROT_EN */
1568 }
1569
1570 return fill_from_dev_buffer(scp, arr,
1571 min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
1572}
1573
1574#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1575
1576static int resp_report_tgtpgs(struct scsi_cmnd * scp,
1577 struct sdebug_dev_info * devip)
1578{
1579 unsigned char *cmd = scp->cmnd;
1580 unsigned char * arr;
1581 int host_no = devip->sdbg_host->shost->host_no;
1582 int n, ret, alen, rlen;
1583 int port_group_a, port_group_b, port_a, port_b;
1584
1585 alen = get_unaligned_be32(cmd + 6);
1586 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1587 if (! arr)
1588 return DID_REQUEUE << 16;
1589 /*
1590 * EVPD page 0x88 states we have two ports, one
1591 * real and a fake port with no device connected.
1592 * So we create two port groups with one port each
1593 * and set the group with port B to unavailable.
1594 */
1595 port_a = 0x1; /* relative port A */
1596 port_b = 0x2; /* relative port B */
1597 port_group_a = (((host_no + 1) & 0x7f) << 8) +
1598 (devip->channel & 0x7f);
1599 port_group_b = (((host_no + 1) & 0x7f) << 8) +
1600 (devip->channel & 0x7f) + 0x80;
1601
1602 /*
1603 * The asymmetric access state is cycled according to the host_id.
1604 */
1605 n = 4;
1606 if (sdebug_vpd_use_hostno == 0) {
1607 arr[n++] = host_no % 3; /* Asymm access state */
1608 arr[n++] = 0x0F; /* claim: all states are supported */
1609 } else {
1610 arr[n++] = 0x0; /* Active/Optimized path */
1611 arr[n++] = 0x01; /* only support active/optimized paths */
1612 }
1613 put_unaligned_be16(port_group_a, arr + n);
1614 n += 2;
1615 arr[n++] = 0; /* Reserved */
1616 arr[n++] = 0; /* Status code */
1617 arr[n++] = 0; /* Vendor unique */
1618 arr[n++] = 0x1; /* One port per group */
1619 arr[n++] = 0; /* Reserved */
1620 arr[n++] = 0; /* Reserved */
1621 put_unaligned_be16(port_a, arr + n);
1622 n += 2;
1623 arr[n++] = 3; /* Port unavailable */
1624 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
1625 put_unaligned_be16(port_group_b, arr + n);
1626 n += 2;
1627 arr[n++] = 0; /* Reserved */
1628 arr[n++] = 0; /* Status code */
1629 arr[n++] = 0; /* Vendor unique */
1630 arr[n++] = 0x1; /* One port per group */
1631 arr[n++] = 0; /* Reserved */
1632 arr[n++] = 0; /* Reserved */
1633 put_unaligned_be16(port_b, arr + n);
1634 n += 2;
1635
1636 rlen = n - 4;
1637 put_unaligned_be32(rlen, arr + 0);
1638
1639 /*
1640 * Return the smallest value of either
1641 * - The allocated length
1642 * - The constructed command length
1643 * - The maximum array size
1644 */
1645 rlen = min(alen,n);
1646 ret = fill_from_dev_buffer(scp, arr,
1647 min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1648 kfree(arr);
1649 return ret;
1650}
1651
1652static int resp_rsup_opcodes(struct scsi_cmnd *scp,
1653 struct sdebug_dev_info *devip)
1654{
1655 bool rctd;
1656 u8 reporting_opts, req_opcode, sdeb_i, supp;
1657 u16 req_sa, u;
1658 u32 alloc_len, a_len;
1659 int k, offset, len, errsts, count, bump, na;
1660 const struct opcode_info_t *oip;
1661 const struct opcode_info_t *r_oip;
1662 u8 *arr;
1663 u8 *cmd = scp->cmnd;
1664
1665 rctd = !!(cmd[2] & 0x80);
1666 reporting_opts = cmd[2] & 0x7;
1667 req_opcode = cmd[3];
1668 req_sa = get_unaligned_be16(cmd + 4);
1669 alloc_len = get_unaligned_be32(cmd + 6);
1670 if (alloc_len < 4 || alloc_len > 0xffff) {
1671 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1672 return check_condition_result;
1673 }
1674 if (alloc_len > 8192)
1675 a_len = 8192;
1676 else
1677 a_len = alloc_len;
1678 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC);
1679 if (NULL == arr) {
1680 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
1681 INSUFF_RES_ASCQ);
1682 return check_condition_result;
1683 }
1684 switch (reporting_opts) {
1685 case 0: /* all commands */
1686 /* count number of commands */
1687 for (count = 0, oip = opcode_info_arr;
1688 oip->num_attached != 0xff; ++oip) {
1689 if (F_INV_OP & oip->flags)
1690 continue;
1691 count += (oip->num_attached + 1);
1692 }
1693 bump = rctd ? 20 : 8;
1694 put_unaligned_be32(count * bump, arr);
1695 for (offset = 4, oip = opcode_info_arr;
1696 oip->num_attached != 0xff && offset < a_len; ++oip) {
1697 if (F_INV_OP & oip->flags)
1698 continue;
1699 na = oip->num_attached;
1700 arr[offset] = oip->opcode;
1701 put_unaligned_be16(oip->sa, arr + offset + 2);
1702 if (rctd)
1703 arr[offset + 5] |= 0x2;
1704 if (FF_SA & oip->flags)
1705 arr[offset + 5] |= 0x1;
1706 put_unaligned_be16(oip->len_mask[0], arr + offset + 6);
1707 if (rctd)
1708 put_unaligned_be16(0xa, arr + offset + 8);
1709 r_oip = oip;
1710 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) {
1711 if (F_INV_OP & oip->flags)
1712 continue;
1713 offset += bump;
1714 arr[offset] = oip->opcode;
1715 put_unaligned_be16(oip->sa, arr + offset + 2);
1716 if (rctd)
1717 arr[offset + 5] |= 0x2;
1718 if (FF_SA & oip->flags)
1719 arr[offset + 5] |= 0x1;
1720 put_unaligned_be16(oip->len_mask[0],
1721 arr + offset + 6);
1722 if (rctd)
1723 put_unaligned_be16(0xa,
1724 arr + offset + 8);
1725 }
1726 oip = r_oip;
1727 offset += bump;
1728 }
1729 break;
1730 case 1: /* one command: opcode only */
1731 case 2: /* one command: opcode plus service action */
1732 case 3: /* one command: if sa==0 then opcode only else opcode+sa */
1733 sdeb_i = opcode_ind_arr[req_opcode];
1734 oip = &opcode_info_arr[sdeb_i];
1735 if (F_INV_OP & oip->flags) {
1736 supp = 1;
1737 offset = 4;
1738 } else {
1739 if (1 == reporting_opts) {
1740 if (FF_SA & oip->flags) {
1741 mk_sense_invalid_fld(scp, SDEB_IN_CDB,
1742 2, 2);
1743 kfree(arr);
1744 return check_condition_result;
1745 }
1746 req_sa = 0;
1747 } else if (2 == reporting_opts &&
1748 0 == (FF_SA & oip->flags)) {
1749 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
1750 kfree(arr); /* point at requested sa */
1751 return check_condition_result;
1752 }
1753 if (0 == (FF_SA & oip->flags) &&
1754 req_opcode == oip->opcode)
1755 supp = 3;
1756 else if (0 == (FF_SA & oip->flags)) {
1757 na = oip->num_attached;
1758 for (k = 0, oip = oip->arrp; k < na;
1759 ++k, ++oip) {
1760 if (req_opcode == oip->opcode)
1761 break;
1762 }
1763 supp = (k >= na) ? 1 : 3;
1764 } else if (req_sa != oip->sa) {
1765 na = oip->num_attached;
1766 for (k = 0, oip = oip->arrp; k < na;
1767 ++k, ++oip) {
1768 if (req_sa == oip->sa)
1769 break;
1770 }
1771 supp = (k >= na) ? 1 : 3;
1772 } else
1773 supp = 3;
1774 if (3 == supp) {
1775 u = oip->len_mask[0];
1776 put_unaligned_be16(u, arr + 2);
1777 arr[4] = oip->opcode;
1778 for (k = 1; k < u; ++k)
1779 arr[4 + k] = (k < 16) ?
1780 oip->len_mask[k] : 0xff;
1781 offset = 4 + u;
1782 } else
1783 offset = 4;
1784 }
1785 arr[1] = (rctd ? 0x80 : 0) | supp;
1786 if (rctd) {
1787 put_unaligned_be16(0xa, arr + offset);
1788 offset += 12;
1789 }
1790 break;
1791 default:
1792 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
1793 kfree(arr);
1794 return check_condition_result;
1795 }
1796 offset = (offset < a_len) ? offset : a_len;
1797 len = (offset < alloc_len) ? offset : alloc_len;
1798 errsts = fill_from_dev_buffer(scp, arr, len);
1799 kfree(arr);
1800 return errsts;
1801}
1802
1803static int resp_rsup_tmfs(struct scsi_cmnd *scp,
1804 struct sdebug_dev_info *devip)
1805{
1806 bool repd;
1807 u32 alloc_len, len;
1808 u8 arr[16];
1809 u8 *cmd = scp->cmnd;
1810
1811 memset(arr, 0, sizeof(arr));
1812 repd = !!(cmd[2] & 0x80);
1813 alloc_len = get_unaligned_be32(cmd + 6);
1814 if (alloc_len < 4) {
1815 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1816 return check_condition_result;
1817 }
1818 arr[0] = 0xc8; /* ATS | ATSS | LURS */
1819 arr[1] = 0x1; /* ITNRS */
1820 if (repd) {
1821 arr[3] = 0xc;
1822 len = 16;
1823 } else
1824 len = 4;
1825
1826 len = (len < alloc_len) ? len : alloc_len;
1827 return fill_from_dev_buffer(scp, arr, len);
1828}
1829
1830/* <<Following mode page info copied from ST318451LW>> */
1831
1832static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target)
1833{ /* Read-Write Error Recovery page for mode_sense */
1834 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
1835 5, 0, 0xff, 0xff};
1836
1837 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
1838 if (1 == pcontrol)
1839 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
1840 return sizeof(err_recov_pg);
1841}
1842
1843static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target)
1844{ /* Disconnect-Reconnect page for mode_sense */
1845 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
1846 0, 0, 0, 0, 0, 0, 0, 0};
1847
1848 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
1849 if (1 == pcontrol)
1850 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
1851 return sizeof(disconnect_pg);
1852}
1853
1854static int resp_format_pg(unsigned char * p, int pcontrol, int target)
1855{ /* Format device page for mode_sense */
1856 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
1857 0, 0, 0, 0, 0, 0, 0, 0,
1858 0, 0, 0, 0, 0x40, 0, 0, 0};
1859
1860 memcpy(p, format_pg, sizeof(format_pg));
1861 put_unaligned_be16(sdebug_sectors_per, p + 10);
1862 put_unaligned_be16(sdebug_sector_size, p + 12);
1863 if (sdebug_removable)
1864 p[20] |= 0x20; /* should agree with INQUIRY */
1865 if (1 == pcontrol)
1866 memset(p + 2, 0, sizeof(format_pg) - 2);
1867 return sizeof(format_pg);
1868}
1869
1870static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
1871 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
1872 0, 0, 0, 0};
1873
1874static int resp_caching_pg(unsigned char * p, int pcontrol, int target)
1875{ /* Caching page for mode_sense */
1876 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
1877 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
1878 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
1879 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
1880
1881 if (SDEBUG_OPT_N_WCE & sdebug_opts)
1882 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
1883 memcpy(p, caching_pg, sizeof(caching_pg));
1884 if (1 == pcontrol)
1885 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
1886 else if (2 == pcontrol)
1887 memcpy(p, d_caching_pg, sizeof(d_caching_pg));
1888 return sizeof(caching_pg);
1889}
1890
1891static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
1892 0, 0, 0x2, 0x4b};
1893
1894static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
1895{ /* Control mode page for mode_sense */
1896 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
1897 0, 0, 0, 0};
1898 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
1899 0, 0, 0x2, 0x4b};
1900
1901 if (sdebug_dsense)
1902 ctrl_m_pg[2] |= 0x4;
1903 else
1904 ctrl_m_pg[2] &= ~0x4;
1905
1906 if (sdebug_ato)
1907 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
1908
1909 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
1910 if (1 == pcontrol)
1911 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
1912 else if (2 == pcontrol)
1913 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
1914 return sizeof(ctrl_m_pg);
1915}
1916
1917
1918static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target)
1919{ /* Informational Exceptions control mode page for mode_sense */
1920 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
1921 0, 0, 0x0, 0x0};
1922 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1923 0, 0, 0x0, 0x0};
1924
1925 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
1926 if (1 == pcontrol)
1927 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
1928 else if (2 == pcontrol)
1929 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
1930 return sizeof(iec_m_pg);
1931}
1932
1933static int resp_sas_sf_m_pg(unsigned char * p, int pcontrol, int target)
1934{ /* SAS SSP mode page - short format for mode_sense */
1935 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
1936 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
1937
1938 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
1939 if (1 == pcontrol)
1940 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
1941 return sizeof(sas_sf_m_pg);
1942}
1943
1944
1945static int resp_sas_pcd_m_spg(unsigned char * p, int pcontrol, int target,
1946 int target_dev_id)
1947{ /* SAS phy control and discover mode page for mode_sense */
1948 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
1949 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
1950 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
1951 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
1952 0x2, 0, 0, 0, 0, 0, 0, 0,
1953 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1954 0, 0, 0, 0, 0, 0, 0, 0,
1955 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
1956 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
1957 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
1958 0x3, 0, 0, 0, 0, 0, 0, 0,
1959 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1960 0, 0, 0, 0, 0, 0, 0, 0,
1961 };
1962 int port_a, port_b;
1963
1964 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 16);
1965 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 24);
1966 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 64);
1967 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 72);
1968 port_a = target_dev_id + 1;
1969 port_b = port_a + 1;
1970 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
1971 put_unaligned_be32(port_a, p + 20);
1972 put_unaligned_be32(port_b, p + 48 + 20);
1973 if (1 == pcontrol)
1974 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
1975 return sizeof(sas_pcd_m_pg);
1976}
1977
1978static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol)
1979{ /* SAS SSP shared protocol specific port mode subpage */
1980 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
1981 0, 0, 0, 0, 0, 0, 0, 0,
1982 };
1983
1984 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
1985 if (1 == pcontrol)
1986 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
1987 return sizeof(sas_sha_m_pg);
1988}
1989
1990#define SDEBUG_MAX_MSENSE_SZ 256
1991
1992static int resp_mode_sense(struct scsi_cmnd *scp,
1993 struct sdebug_dev_info *devip)
1994{
1995 int pcontrol, pcode, subpcode, bd_len;
1996 unsigned char dev_spec;
1997 int alloc_len, offset, len, target_dev_id;
1998 int target = scp->device->id;
1999 unsigned char * ap;
2000 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
2001 unsigned char *cmd = scp->cmnd;
2002 bool dbd, llbaa, msense_6, is_disk, bad_pcode;
2003
2004 dbd = !!(cmd[1] & 0x8); /* disable block descriptors */
2005 pcontrol = (cmd[2] & 0xc0) >> 6;
2006 pcode = cmd[2] & 0x3f;
2007 subpcode = cmd[3];
2008 msense_6 = (MODE_SENSE == cmd[0]);
2009 llbaa = msense_6 ? false : !!(cmd[1] & 0x10);
2010 is_disk = (sdebug_ptype == TYPE_DISK);
2011 if (is_disk && !dbd)
2012 bd_len = llbaa ? 16 : 8;
2013 else
2014 bd_len = 0;
2015 alloc_len = msense_6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2016 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
2017 if (0x3 == pcontrol) { /* Saving values not supported */
2018 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
2019 return check_condition_result;
2020 }
2021 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
2022 (devip->target * 1000) - 3;
2023 /* for disks set DPOFUA bit and clear write protect (WP) bit */
2024 if (is_disk)
2025 dev_spec = 0x10; /* =0x90 if WP=1 implies read-only */
2026 else
2027 dev_spec = 0x0;
2028 if (msense_6) {
2029 arr[2] = dev_spec;
2030 arr[3] = bd_len;
2031 offset = 4;
2032 } else {
2033 arr[3] = dev_spec;
2034 if (16 == bd_len)
2035 arr[4] = 0x1; /* set LONGLBA bit */
2036 arr[7] = bd_len; /* assume 255 or less */
2037 offset = 8;
2038 }
2039 ap = arr + offset;
2040 if ((bd_len > 0) && (!sdebug_capacity))
2041 sdebug_capacity = get_sdebug_capacity();
2042
2043 if (8 == bd_len) {
2044 if (sdebug_capacity > 0xfffffffe)
2045 put_unaligned_be32(0xffffffff, ap + 0);
2046 else
2047 put_unaligned_be32(sdebug_capacity, ap + 0);
2048 put_unaligned_be16(sdebug_sector_size, ap + 6);
2049 offset += bd_len;
2050 ap = arr + offset;
2051 } else if (16 == bd_len) {
2052 put_unaligned_be64((u64)sdebug_capacity, ap + 0);
2053 put_unaligned_be32(sdebug_sector_size, ap + 12);
2054 offset += bd_len;
2055 ap = arr + offset;
2056 }
2057
2058 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
2059 /* TODO: Control Extension page */
2060 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2061 return check_condition_result;
2062 }
2063 bad_pcode = false;
2064
2065 switch (pcode) {
2066 case 0x1: /* Read-Write error recovery page, direct access */
2067 len = resp_err_recov_pg(ap, pcontrol, target);
2068 offset += len;
2069 break;
2070 case 0x2: /* Disconnect-Reconnect page, all devices */
2071 len = resp_disconnect_pg(ap, pcontrol, target);
2072 offset += len;
2073 break;
2074 case 0x3: /* Format device page, direct access */
2075 if (is_disk) {
2076 len = resp_format_pg(ap, pcontrol, target);
2077 offset += len;
2078 } else
2079 bad_pcode = true;
2080 break;
2081 case 0x8: /* Caching page, direct access */
2082 if (is_disk) {
2083 len = resp_caching_pg(ap, pcontrol, target);
2084 offset += len;
2085 } else
2086 bad_pcode = true;
2087 break;
2088 case 0xa: /* Control Mode page, all devices */
2089 len = resp_ctrl_m_pg(ap, pcontrol, target);
2090 offset += len;
2091 break;
2092 case 0x19: /* if spc==1 then sas phy, control+discover */
2093 if ((subpcode > 0x2) && (subpcode < 0xff)) {
2094 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2095 return check_condition_result;
2096 }
2097 len = 0;
2098 if ((0x0 == subpcode) || (0xff == subpcode))
2099 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2100 if ((0x1 == subpcode) || (0xff == subpcode))
2101 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
2102 target_dev_id);
2103 if ((0x2 == subpcode) || (0xff == subpcode))
2104 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2105 offset += len;
2106 break;
2107 case 0x1c: /* Informational Exceptions Mode page, all devices */
2108 len = resp_iec_m_pg(ap, pcontrol, target);
2109 offset += len;
2110 break;
2111 case 0x3f: /* Read all Mode pages */
2112 if ((0 == subpcode) || (0xff == subpcode)) {
2113 len = resp_err_recov_pg(ap, pcontrol, target);
2114 len += resp_disconnect_pg(ap + len, pcontrol, target);
2115 if (is_disk) {
2116 len += resp_format_pg(ap + len, pcontrol,
2117 target);
2118 len += resp_caching_pg(ap + len, pcontrol,
2119 target);
2120 }
2121 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
2122 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2123 if (0xff == subpcode) {
2124 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
2125 target, target_dev_id);
2126 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2127 }
2128 len += resp_iec_m_pg(ap + len, pcontrol, target);
2129 offset += len;
2130 } else {
2131 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2132 return check_condition_result;
2133 }
2134 break;
2135 default:
2136 bad_pcode = true;
2137 break;
2138 }
2139 if (bad_pcode) {
2140 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2141 return check_condition_result;
2142 }
2143 if (msense_6)
2144 arr[0] = offset - 1;
2145 else
2146 put_unaligned_be16((offset - 2), arr + 0);
2147 return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
2148}
2149
2150#define SDEBUG_MAX_MSELECT_SZ 512
2151
2152static int resp_mode_select(struct scsi_cmnd *scp,
2153 struct sdebug_dev_info *devip)
2154{
2155 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
2156 int param_len, res, mpage;
2157 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
2158 unsigned char *cmd = scp->cmnd;
2159 int mselect6 = (MODE_SELECT == cmd[0]);
2160
2161 memset(arr, 0, sizeof(arr));
2162 pf = cmd[1] & 0x10;
2163 sp = cmd[1] & 0x1;
2164 param_len = mselect6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2165 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
2166 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1);
2167 return check_condition_result;
2168 }
2169 res = fetch_to_dev_buffer(scp, arr, param_len);
2170 if (-1 == res)
2171 return DID_ERROR << 16;
2172 else if (sdebug_verbose && (res < param_len))
2173 sdev_printk(KERN_INFO, scp->device,
2174 "%s: cdb indicated=%d, IO sent=%d bytes\n",
2175 __func__, param_len, res);
2176 md_len = mselect6 ? (arr[0] + 1) : (get_unaligned_be16(arr + 0) + 2);
2177 bd_len = mselect6 ? arr[3] : get_unaligned_be16(arr + 6);
2178 if (md_len > 2) {
2179 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1);
2180 return check_condition_result;
2181 }
2182 off = bd_len + (mselect6 ? 4 : 8);
2183 mpage = arr[off] & 0x3f;
2184 ps = !!(arr[off] & 0x80);
2185 if (ps) {
2186 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7);
2187 return check_condition_result;
2188 }
2189 spf = !!(arr[off] & 0x40);
2190 pg_len = spf ? (get_unaligned_be16(arr + off + 2) + 4) :
2191 (arr[off + 1] + 2);
2192 if ((pg_len + off) > param_len) {
2193 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2194 PARAMETER_LIST_LENGTH_ERR, 0);
2195 return check_condition_result;
2196 }
2197 switch (mpage) {
2198 case 0x8: /* Caching Mode page */
2199 if (caching_pg[1] == arr[off + 1]) {
2200 memcpy(caching_pg + 2, arr + off + 2,
2201 sizeof(caching_pg) - 2);
2202 goto set_mode_changed_ua;
2203 }
2204 break;
2205 case 0xa: /* Control Mode page */
2206 if (ctrl_m_pg[1] == arr[off + 1]) {
2207 memcpy(ctrl_m_pg + 2, arr + off + 2,
2208 sizeof(ctrl_m_pg) - 2);
2209 sdebug_dsense = !!(ctrl_m_pg[2] & 0x4);
2210 goto set_mode_changed_ua;
2211 }
2212 break;
2213 case 0x1c: /* Informational Exceptions Mode page */
2214 if (iec_m_pg[1] == arr[off + 1]) {
2215 memcpy(iec_m_pg + 2, arr + off + 2,
2216 sizeof(iec_m_pg) - 2);
2217 goto set_mode_changed_ua;
2218 }
2219 break;
2220 default:
2221 break;
2222 }
2223 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5);
2224 return check_condition_result;
2225set_mode_changed_ua:
2226 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
2227 return 0;
2228}
2229
2230static int resp_temp_l_pg(unsigned char * arr)
2231{
2232 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
2233 0x0, 0x1, 0x3, 0x2, 0x0, 65,
2234 };
2235
2236 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
2237 return sizeof(temp_l_pg);
2238}
2239
2240static int resp_ie_l_pg(unsigned char * arr)
2241{
2242 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
2243 };
2244
2245 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
2246 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
2247 arr[4] = THRESHOLD_EXCEEDED;
2248 arr[5] = 0xff;
2249 }
2250 return sizeof(ie_l_pg);
2251}
2252
2253#define SDEBUG_MAX_LSENSE_SZ 512
2254
2255static int resp_log_sense(struct scsi_cmnd * scp,
2256 struct sdebug_dev_info * devip)
2257{
2258 int ppc, sp, pcontrol, pcode, subpcode, alloc_len, len, n;
2259 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
2260 unsigned char *cmd = scp->cmnd;
2261
2262 memset(arr, 0, sizeof(arr));
2263 ppc = cmd[1] & 0x2;
2264 sp = cmd[1] & 0x1;
2265 if (ppc || sp) {
2266 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0);
2267 return check_condition_result;
2268 }
2269 pcontrol = (cmd[2] & 0xc0) >> 6;
2270 pcode = cmd[2] & 0x3f;
2271 subpcode = cmd[3] & 0xff;
2272 alloc_len = get_unaligned_be16(cmd + 7);
2273 arr[0] = pcode;
2274 if (0 == subpcode) {
2275 switch (pcode) {
2276 case 0x0: /* Supported log pages log page */
2277 n = 4;
2278 arr[n++] = 0x0; /* this page */
2279 arr[n++] = 0xd; /* Temperature */
2280 arr[n++] = 0x2f; /* Informational exceptions */
2281 arr[3] = n - 4;
2282 break;
2283 case 0xd: /* Temperature log page */
2284 arr[3] = resp_temp_l_pg(arr + 4);
2285 break;
2286 case 0x2f: /* Informational exceptions log page */
2287 arr[3] = resp_ie_l_pg(arr + 4);
2288 break;
2289 default:
2290 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2291 return check_condition_result;
2292 }
2293 } else if (0xff == subpcode) {
2294 arr[0] |= 0x40;
2295 arr[1] = subpcode;
2296 switch (pcode) {
2297 case 0x0: /* Supported log pages and subpages log page */
2298 n = 4;
2299 arr[n++] = 0x0;
2300 arr[n++] = 0x0; /* 0,0 page */
2301 arr[n++] = 0x0;
2302 arr[n++] = 0xff; /* this page */
2303 arr[n++] = 0xd;
2304 arr[n++] = 0x0; /* Temperature */
2305 arr[n++] = 0x2f;
2306 arr[n++] = 0x0; /* Informational exceptions */
2307 arr[3] = n - 4;
2308 break;
2309 case 0xd: /* Temperature subpages */
2310 n = 4;
2311 arr[n++] = 0xd;
2312 arr[n++] = 0x0; /* Temperature */
2313 arr[3] = n - 4;
2314 break;
2315 case 0x2f: /* Informational exceptions subpages */
2316 n = 4;
2317 arr[n++] = 0x2f;
2318 arr[n++] = 0x0; /* Informational exceptions */
2319 arr[3] = n - 4;
2320 break;
2321 default:
2322 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2323 return check_condition_result;
2324 }
2325 } else {
2326 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2327 return check_condition_result;
2328 }
2329 len = min(get_unaligned_be16(arr + 2) + 4, alloc_len);
2330 return fill_from_dev_buffer(scp, arr,
2331 min(len, SDEBUG_MAX_INQ_ARR_SZ));
2332}
2333
2334static int check_device_access_params(struct scsi_cmnd *scp,
2335 unsigned long long lba, unsigned int num)
2336{
2337 if (lba + num > sdebug_capacity) {
2338 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2339 return check_condition_result;
2340 }
2341 /* transfer length excessive (tie in to block limits VPD page) */
2342 if (num > sdebug_store_sectors) {
2343 /* needs work to find which cdb byte 'num' comes from */
2344 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2345 return check_condition_result;
2346 }
2347 return 0;
2348}
2349
2350/* Returns number of bytes copied or -1 if error. */
2351static int do_device_access(struct scsi_cmnd *scmd, u64 lba, u32 num,
2352 bool do_write)
2353{
2354 int ret;
2355 u64 block, rest = 0;
2356 struct scsi_data_buffer *sdb;
2357 enum dma_data_direction dir;
2358
2359 if (do_write) {
2360 sdb = scsi_out(scmd);
2361 dir = DMA_TO_DEVICE;
2362 } else {
2363 sdb = scsi_in(scmd);
2364 dir = DMA_FROM_DEVICE;
2365 }
2366
2367 if (!sdb->length)
2368 return 0;
2369 if (!(scsi_bidi_cmnd(scmd) || scmd->sc_data_direction == dir))
2370 return -1;
2371
2372 block = do_div(lba, sdebug_store_sectors);
2373 if (block + num > sdebug_store_sectors)
2374 rest = block + num - sdebug_store_sectors;
2375
2376 ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
2377 fake_storep + (block * sdebug_sector_size),
2378 (num - rest) * sdebug_sector_size, 0, do_write);
2379 if (ret != (num - rest) * sdebug_sector_size)
2380 return ret;
2381
2382 if (rest) {
2383 ret += sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
2384 fake_storep, rest * sdebug_sector_size,
2385 (num - rest) * sdebug_sector_size, do_write);
2386 }
2387
2388 return ret;
2389}
2390
2391/* If fake_store(lba,num) compares equal to arr(num), then copy top half of
2392 * arr into fake_store(lba,num) and return true. If comparison fails then
2393 * return false. */
2394static bool comp_write_worker(u64 lba, u32 num, const u8 *arr)
2395{
2396 bool res;
2397 u64 block, rest = 0;
2398 u32 store_blks = sdebug_store_sectors;
2399 u32 lb_size = sdebug_sector_size;
2400
2401 block = do_div(lba, store_blks);
2402 if (block + num > store_blks)
2403 rest = block + num - store_blks;
2404
2405 res = !memcmp(fake_storep + (block * lb_size), arr,
2406 (num - rest) * lb_size);
2407 if (!res)
2408 return res;
2409 if (rest)
2410 res = memcmp(fake_storep, arr + ((num - rest) * lb_size),
2411 rest * lb_size);
2412 if (!res)
2413 return res;
2414 arr += num * lb_size;
2415 memcpy(fake_storep + (block * lb_size), arr, (num - rest) * lb_size);
2416 if (rest)
2417 memcpy(fake_storep, arr + ((num - rest) * lb_size),
2418 rest * lb_size);
2419 return res;
2420}
2421
2422static __be16 dif_compute_csum(const void *buf, int len)
2423{
2424 __be16 csum;
2425
2426 if (sdebug_guard)
2427 csum = (__force __be16)ip_compute_csum(buf, len);
2428 else
2429 csum = cpu_to_be16(crc_t10dif(buf, len));
2430
2431 return csum;
2432}
2433
2434static int dif_verify(struct t10_pi_tuple *sdt, const void *data,
2435 sector_t sector, u32 ei_lba)
2436{
2437 __be16 csum = dif_compute_csum(data, sdebug_sector_size);
2438
2439 if (sdt->guard_tag != csum) {
2440 pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
2441 (unsigned long)sector,
2442 be16_to_cpu(sdt->guard_tag),
2443 be16_to_cpu(csum));
2444 return 0x01;
2445 }
2446 if (sdebug_dif == T10_PI_TYPE1_PROTECTION &&
2447 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
2448 pr_err("REF check failed on sector %lu\n",
2449 (unsigned long)sector);
2450 return 0x03;
2451 }
2452 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
2453 be32_to_cpu(sdt->ref_tag) != ei_lba) {
2454 pr_err("REF check failed on sector %lu\n",
2455 (unsigned long)sector);
2456 return 0x03;
2457 }
2458 return 0;
2459}
2460
2461static void dif_copy_prot(struct scsi_cmnd *SCpnt, sector_t sector,
2462 unsigned int sectors, bool read)
2463{
2464 size_t resid;
2465 void *paddr;
2466 const void *dif_store_end = dif_storep + sdebug_store_sectors;
2467 struct sg_mapping_iter miter;
2468
2469 /* Bytes of protection data to copy into sgl */
2470 resid = sectors * sizeof(*dif_storep);
2471
2472 sg_miter_start(&miter, scsi_prot_sglist(SCpnt),
2473 scsi_prot_sg_count(SCpnt), SG_MITER_ATOMIC |
2474 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
2475
2476 while (sg_miter_next(&miter) && resid > 0) {
2477 size_t len = min(miter.length, resid);
2478 void *start = dif_store(sector);
2479 size_t rest = 0;
2480
2481 if (dif_store_end < start + len)
2482 rest = start + len - dif_store_end;
2483
2484 paddr = miter.addr;
2485
2486 if (read)
2487 memcpy(paddr, start, len - rest);
2488 else
2489 memcpy(start, paddr, len - rest);
2490
2491 if (rest) {
2492 if (read)
2493 memcpy(paddr + len - rest, dif_storep, rest);
2494 else
2495 memcpy(dif_storep, paddr + len - rest, rest);
2496 }
2497
2498 sector += len / sizeof(*dif_storep);
2499 resid -= len;
2500 }
2501 sg_miter_stop(&miter);
2502}
2503
2504static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
2505 unsigned int sectors, u32 ei_lba)
2506{
2507 unsigned int i;
2508 struct t10_pi_tuple *sdt;
2509 sector_t sector;
2510
2511 for (i = 0; i < sectors; i++, ei_lba++) {
2512 int ret;
2513
2514 sector = start_sec + i;
2515 sdt = dif_store(sector);
2516
2517 if (sdt->app_tag == cpu_to_be16(0xffff))
2518 continue;
2519
2520 ret = dif_verify(sdt, fake_store(sector), sector, ei_lba);
2521 if (ret) {
2522 dif_errors++;
2523 return ret;
2524 }
2525 }
2526
2527 dif_copy_prot(SCpnt, start_sec, sectors, true);
2528 dix_reads++;
2529
2530 return 0;
2531}
2532
2533static int resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2534{
2535 u8 *cmd = scp->cmnd;
2536 struct sdebug_queued_cmd *sqcp;
2537 u64 lba;
2538 u32 num;
2539 u32 ei_lba;
2540 unsigned long iflags;
2541 int ret;
2542 bool check_prot;
2543
2544 switch (cmd[0]) {
2545 case READ_16:
2546 ei_lba = 0;
2547 lba = get_unaligned_be64(cmd + 2);
2548 num = get_unaligned_be32(cmd + 10);
2549 check_prot = true;
2550 break;
2551 case READ_10:
2552 ei_lba = 0;
2553 lba = get_unaligned_be32(cmd + 2);
2554 num = get_unaligned_be16(cmd + 7);
2555 check_prot = true;
2556 break;
2557 case READ_6:
2558 ei_lba = 0;
2559 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
2560 (u32)(cmd[1] & 0x1f) << 16;
2561 num = (0 == cmd[4]) ? 256 : cmd[4];
2562 check_prot = true;
2563 break;
2564 case READ_12:
2565 ei_lba = 0;
2566 lba = get_unaligned_be32(cmd + 2);
2567 num = get_unaligned_be32(cmd + 6);
2568 check_prot = true;
2569 break;
2570 case XDWRITEREAD_10:
2571 ei_lba = 0;
2572 lba = get_unaligned_be32(cmd + 2);
2573 num = get_unaligned_be16(cmd + 7);
2574 check_prot = false;
2575 break;
2576 default: /* assume READ(32) */
2577 lba = get_unaligned_be64(cmd + 12);
2578 ei_lba = get_unaligned_be32(cmd + 20);
2579 num = get_unaligned_be32(cmd + 28);
2580 check_prot = false;
2581 break;
2582 }
2583 if (unlikely(have_dif_prot && check_prot)) {
2584 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
2585 (cmd[1] & 0xe0)) {
2586 mk_sense_invalid_opcode(scp);
2587 return check_condition_result;
2588 }
2589 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
2590 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
2591 (cmd[1] & 0xe0) == 0)
2592 sdev_printk(KERN_ERR, scp->device, "Unprotected RD "
2593 "to DIF device\n");
2594 }
2595 if (unlikely(sdebug_any_injecting_opt)) {
2596 sqcp = (struct sdebug_queued_cmd *)scp->host_scribble;
2597
2598 if (sqcp) {
2599 if (sqcp->inj_short)
2600 num /= 2;
2601 }
2602 } else
2603 sqcp = NULL;
2604
2605 /* inline check_device_access_params() */
2606 if (unlikely(lba + num > sdebug_capacity)) {
2607 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2608 return check_condition_result;
2609 }
2610 /* transfer length excessive (tie in to block limits VPD page) */
2611 if (unlikely(num > sdebug_store_sectors)) {
2612 /* needs work to find which cdb byte 'num' comes from */
2613 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2614 return check_condition_result;
2615 }
2616
2617 if (unlikely((SDEBUG_OPT_MEDIUM_ERR & sdebug_opts) &&
2618 (lba <= (OPT_MEDIUM_ERR_ADDR + OPT_MEDIUM_ERR_NUM - 1)) &&
2619 ((lba + num) > OPT_MEDIUM_ERR_ADDR))) {
2620 /* claim unrecoverable read error */
2621 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
2622 /* set info field and valid bit for fixed descriptor */
2623 if (0x70 == (scp->sense_buffer[0] & 0x7f)) {
2624 scp->sense_buffer[0] |= 0x80; /* Valid bit */
2625 ret = (lba < OPT_MEDIUM_ERR_ADDR)
2626 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
2627 put_unaligned_be32(ret, scp->sense_buffer + 3);
2628 }
2629 scsi_set_resid(scp, scsi_bufflen(scp));
2630 return check_condition_result;
2631 }
2632
2633 read_lock_irqsave(&atomic_rw, iflags);
2634
2635 /* DIX + T10 DIF */
2636 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
2637 int prot_ret = prot_verify_read(scp, lba, num, ei_lba);
2638
2639 if (prot_ret) {
2640 read_unlock_irqrestore(&atomic_rw, iflags);
2641 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, prot_ret);
2642 return illegal_condition_result;
2643 }
2644 }
2645
2646 ret = do_device_access(scp, lba, num, false);
2647 read_unlock_irqrestore(&atomic_rw, iflags);
2648 if (unlikely(ret == -1))
2649 return DID_ERROR << 16;
2650
2651 scsi_in(scp)->resid = scsi_bufflen(scp) - ret;
2652
2653 if (unlikely(sqcp)) {
2654 if (sqcp->inj_recovered) {
2655 mk_sense_buffer(scp, RECOVERED_ERROR,
2656 THRESHOLD_EXCEEDED, 0);
2657 return check_condition_result;
2658 } else if (sqcp->inj_transport) {
2659 mk_sense_buffer(scp, ABORTED_COMMAND,
2660 TRANSPORT_PROBLEM, ACK_NAK_TO);
2661 return check_condition_result;
2662 } else if (sqcp->inj_dif) {
2663 /* Logical block guard check failed */
2664 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
2665 return illegal_condition_result;
2666 } else if (sqcp->inj_dix) {
2667 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
2668 return illegal_condition_result;
2669 }
2670 }
2671 return 0;
2672}
2673
2674static void dump_sector(unsigned char *buf, int len)
2675{
2676 int i, j, n;
2677
2678 pr_err(">>> Sector Dump <<<\n");
2679 for (i = 0 ; i < len ; i += 16) {
2680 char b[128];
2681
2682 for (j = 0, n = 0; j < 16; j++) {
2683 unsigned char c = buf[i+j];
2684
2685 if (c >= 0x20 && c < 0x7e)
2686 n += scnprintf(b + n, sizeof(b) - n,
2687 " %c ", buf[i+j]);
2688 else
2689 n += scnprintf(b + n, sizeof(b) - n,
2690 "%02x ", buf[i+j]);
2691 }
2692 pr_err("%04d: %s\n", i, b);
2693 }
2694}
2695
2696static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
2697 unsigned int sectors, u32 ei_lba)
2698{
2699 int ret;
2700 struct t10_pi_tuple *sdt;
2701 void *daddr;
2702 sector_t sector = start_sec;
2703 int ppage_offset;
2704 int dpage_offset;
2705 struct sg_mapping_iter diter;
2706 struct sg_mapping_iter piter;
2707
2708 BUG_ON(scsi_sg_count(SCpnt) == 0);
2709 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
2710
2711 sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
2712 scsi_prot_sg_count(SCpnt),
2713 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
2714 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
2715 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
2716
2717 /* For each protection page */
2718 while (sg_miter_next(&piter)) {
2719 dpage_offset = 0;
2720 if (WARN_ON(!sg_miter_next(&diter))) {
2721 ret = 0x01;
2722 goto out;
2723 }
2724
2725 for (ppage_offset = 0; ppage_offset < piter.length;
2726 ppage_offset += sizeof(struct t10_pi_tuple)) {
2727 /* If we're at the end of the current
2728 * data page advance to the next one
2729 */
2730 if (dpage_offset >= diter.length) {
2731 if (WARN_ON(!sg_miter_next(&diter))) {
2732 ret = 0x01;
2733 goto out;
2734 }
2735 dpage_offset = 0;
2736 }
2737
2738 sdt = piter.addr + ppage_offset;
2739 daddr = diter.addr + dpage_offset;
2740
2741 ret = dif_verify(sdt, daddr, sector, ei_lba);
2742 if (ret) {
2743 dump_sector(daddr, sdebug_sector_size);
2744 goto out;
2745 }
2746
2747 sector++;
2748 ei_lba++;
2749 dpage_offset += sdebug_sector_size;
2750 }
2751 diter.consumed = dpage_offset;
2752 sg_miter_stop(&diter);
2753 }
2754 sg_miter_stop(&piter);
2755
2756 dif_copy_prot(SCpnt, start_sec, sectors, false);
2757 dix_writes++;
2758
2759 return 0;
2760
2761out:
2762 dif_errors++;
2763 sg_miter_stop(&diter);
2764 sg_miter_stop(&piter);
2765 return ret;
2766}
2767
2768static unsigned long lba_to_map_index(sector_t lba)
2769{
2770 if (sdebug_unmap_alignment)
2771 lba += sdebug_unmap_granularity - sdebug_unmap_alignment;
2772 sector_div(lba, sdebug_unmap_granularity);
2773 return lba;
2774}
2775
2776static sector_t map_index_to_lba(unsigned long index)
2777{
2778 sector_t lba = index * sdebug_unmap_granularity;
2779
2780 if (sdebug_unmap_alignment)
2781 lba -= sdebug_unmap_granularity - sdebug_unmap_alignment;
2782 return lba;
2783}
2784
2785static unsigned int map_state(sector_t lba, unsigned int *num)
2786{
2787 sector_t end;
2788 unsigned int mapped;
2789 unsigned long index;
2790 unsigned long next;
2791
2792 index = lba_to_map_index(lba);
2793 mapped = test_bit(index, map_storep);
2794
2795 if (mapped)
2796 next = find_next_zero_bit(map_storep, map_size, index);
2797 else
2798 next = find_next_bit(map_storep, map_size, index);
2799
2800 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
2801 *num = end - lba;
2802 return mapped;
2803}
2804
2805static void map_region(sector_t lba, unsigned int len)
2806{
2807 sector_t end = lba + len;
2808
2809 while (lba < end) {
2810 unsigned long index = lba_to_map_index(lba);
2811
2812 if (index < map_size)
2813 set_bit(index, map_storep);
2814
2815 lba = map_index_to_lba(index + 1);
2816 }
2817}
2818
2819static void unmap_region(sector_t lba, unsigned int len)
2820{
2821 sector_t end = lba + len;
2822
2823 while (lba < end) {
2824 unsigned long index = lba_to_map_index(lba);
2825
2826 if (lba == map_index_to_lba(index) &&
2827 lba + sdebug_unmap_granularity <= end &&
2828 index < map_size) {
2829 clear_bit(index, map_storep);
2830 if (sdebug_lbprz) { /* for LBPRZ=2 return 0xff_s */
2831 memset(fake_storep +
2832 lba * sdebug_sector_size,
2833 (sdebug_lbprz & 1) ? 0 : 0xff,
2834 sdebug_sector_size *
2835 sdebug_unmap_granularity);
2836 }
2837 if (dif_storep) {
2838 memset(dif_storep + lba, 0xff,
2839 sizeof(*dif_storep) *
2840 sdebug_unmap_granularity);
2841 }
2842 }
2843 lba = map_index_to_lba(index + 1);
2844 }
2845}
2846
2847static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2848{
2849 u8 *cmd = scp->cmnd;
2850 u64 lba;
2851 u32 num;
2852 u32 ei_lba;
2853 unsigned long iflags;
2854 int ret;
2855 bool check_prot;
2856
2857 switch (cmd[0]) {
2858 case WRITE_16:
2859 ei_lba = 0;
2860 lba = get_unaligned_be64(cmd + 2);
2861 num = get_unaligned_be32(cmd + 10);
2862 check_prot = true;
2863 break;
2864 case WRITE_10:
2865 ei_lba = 0;
2866 lba = get_unaligned_be32(cmd + 2);
2867 num = get_unaligned_be16(cmd + 7);
2868 check_prot = true;
2869 break;
2870 case WRITE_6:
2871 ei_lba = 0;
2872 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
2873 (u32)(cmd[1] & 0x1f) << 16;
2874 num = (0 == cmd[4]) ? 256 : cmd[4];
2875 check_prot = true;
2876 break;
2877 case WRITE_12:
2878 ei_lba = 0;
2879 lba = get_unaligned_be32(cmd + 2);
2880 num = get_unaligned_be32(cmd + 6);
2881 check_prot = true;
2882 break;
2883 case 0x53: /* XDWRITEREAD(10) */
2884 ei_lba = 0;
2885 lba = get_unaligned_be32(cmd + 2);
2886 num = get_unaligned_be16(cmd + 7);
2887 check_prot = false;
2888 break;
2889 default: /* assume WRITE(32) */
2890 lba = get_unaligned_be64(cmd + 12);
2891 ei_lba = get_unaligned_be32(cmd + 20);
2892 num = get_unaligned_be32(cmd + 28);
2893 check_prot = false;
2894 break;
2895 }
2896 if (unlikely(have_dif_prot && check_prot)) {
2897 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
2898 (cmd[1] & 0xe0)) {
2899 mk_sense_invalid_opcode(scp);
2900 return check_condition_result;
2901 }
2902 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
2903 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
2904 (cmd[1] & 0xe0) == 0)
2905 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
2906 "to DIF device\n");
2907 }
2908
2909 /* inline check_device_access_params() */
2910 if (unlikely(lba + num > sdebug_capacity)) {
2911 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2912 return check_condition_result;
2913 }
2914 /* transfer length excessive (tie in to block limits VPD page) */
2915 if (unlikely(num > sdebug_store_sectors)) {
2916 /* needs work to find which cdb byte 'num' comes from */
2917 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2918 return check_condition_result;
2919 }
2920
2921 write_lock_irqsave(&atomic_rw, iflags);
2922
2923 /* DIX + T10 DIF */
2924 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
2925 int prot_ret = prot_verify_write(scp, lba, num, ei_lba);
2926
2927 if (prot_ret) {
2928 write_unlock_irqrestore(&atomic_rw, iflags);
2929 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, prot_ret);
2930 return illegal_condition_result;
2931 }
2932 }
2933
2934 ret = do_device_access(scp, lba, num, true);
2935 if (unlikely(scsi_debug_lbp()))
2936 map_region(lba, num);
2937 write_unlock_irqrestore(&atomic_rw, iflags);
2938 if (unlikely(-1 == ret))
2939 return DID_ERROR << 16;
2940 else if (unlikely(sdebug_verbose &&
2941 (ret < (num * sdebug_sector_size))))
2942 sdev_printk(KERN_INFO, scp->device,
2943 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
2944 my_name, num * sdebug_sector_size, ret);
2945
2946 if (unlikely(sdebug_any_injecting_opt)) {
2947 struct sdebug_queued_cmd *sqcp =
2948 (struct sdebug_queued_cmd *)scp->host_scribble;
2949
2950 if (sqcp) {
2951 if (sqcp->inj_recovered) {
2952 mk_sense_buffer(scp, RECOVERED_ERROR,
2953 THRESHOLD_EXCEEDED, 0);
2954 return check_condition_result;
2955 } else if (sqcp->inj_dif) {
2956 /* Logical block guard check failed */
2957 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
2958 return illegal_condition_result;
2959 } else if (sqcp->inj_dix) {
2960 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
2961 return illegal_condition_result;
2962 }
2963 }
2964 }
2965 return 0;
2966}
2967
2968static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num,
2969 u32 ei_lba, bool unmap, bool ndob)
2970{
2971 unsigned long iflags;
2972 unsigned long long i;
2973 int ret;
2974 u64 lba_off;
2975
2976 ret = check_device_access_params(scp, lba, num);
2977 if (ret)
2978 return ret;
2979
2980 write_lock_irqsave(&atomic_rw, iflags);
2981
2982 if (unmap && scsi_debug_lbp()) {
2983 unmap_region(lba, num);
2984 goto out;
2985 }
2986
2987 lba_off = lba * sdebug_sector_size;
2988 /* if ndob then zero 1 logical block, else fetch 1 logical block */
2989 if (ndob) {
2990 memset(fake_storep + lba_off, 0, sdebug_sector_size);
2991 ret = 0;
2992 } else
2993 ret = fetch_to_dev_buffer(scp, fake_storep + lba_off,
2994 sdebug_sector_size);
2995
2996 if (-1 == ret) {
2997 write_unlock_irqrestore(&atomic_rw, iflags);
2998 return DID_ERROR << 16;
2999 } else if (sdebug_verbose && (ret < (num * sdebug_sector_size)))
3000 sdev_printk(KERN_INFO, scp->device,
3001 "%s: %s: cdb indicated=%u, IO sent=%d bytes\n",
3002 my_name, "write same",
3003 num * sdebug_sector_size, ret);
3004
3005 /* Copy first sector to remaining blocks */
3006 for (i = 1 ; i < num ; i++)
3007 memcpy(fake_storep + ((lba + i) * sdebug_sector_size),
3008 fake_storep + lba_off,
3009 sdebug_sector_size);
3010
3011 if (scsi_debug_lbp())
3012 map_region(lba, num);
3013out:
3014 write_unlock_irqrestore(&atomic_rw, iflags);
3015
3016 return 0;
3017}
3018
3019static int resp_write_same_10(struct scsi_cmnd *scp,
3020 struct sdebug_dev_info *devip)
3021{
3022 u8 *cmd = scp->cmnd;
3023 u32 lba;
3024 u16 num;
3025 u32 ei_lba = 0;
3026 bool unmap = false;
3027
3028 if (cmd[1] & 0x8) {
3029 if (sdebug_lbpws10 == 0) {
3030 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3031 return check_condition_result;
3032 } else
3033 unmap = true;
3034 }
3035 lba = get_unaligned_be32(cmd + 2);
3036 num = get_unaligned_be16(cmd + 7);
3037 if (num > sdebug_write_same_length) {
3038 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3039 return check_condition_result;
3040 }
3041 return resp_write_same(scp, lba, num, ei_lba, unmap, false);
3042}
3043
3044static int resp_write_same_16(struct scsi_cmnd *scp,
3045 struct sdebug_dev_info *devip)
3046{
3047 u8 *cmd = scp->cmnd;
3048 u64 lba;
3049 u32 num;
3050 u32 ei_lba = 0;
3051 bool unmap = false;
3052 bool ndob = false;
3053
3054 if (cmd[1] & 0x8) { /* UNMAP */
3055 if (sdebug_lbpws == 0) {
3056 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3057 return check_condition_result;
3058 } else
3059 unmap = true;
3060 }
3061 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */
3062 ndob = true;
3063 lba = get_unaligned_be64(cmd + 2);
3064 num = get_unaligned_be32(cmd + 10);
3065 if (num > sdebug_write_same_length) {
3066 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
3067 return check_condition_result;
3068 }
3069 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob);
3070}
3071
3072/* Note the mode field is in the same position as the (lower) service action
3073 * field. For the Report supported operation codes command, SPC-4 suggests
3074 * each mode of this command should be reported separately; for future. */
3075static int resp_write_buffer(struct scsi_cmnd *scp,
3076 struct sdebug_dev_info *devip)
3077{
3078 u8 *cmd = scp->cmnd;
3079 struct scsi_device *sdp = scp->device;
3080 struct sdebug_dev_info *dp;
3081 u8 mode;
3082
3083 mode = cmd[1] & 0x1f;
3084 switch (mode) {
3085 case 0x4: /* download microcode (MC) and activate (ACT) */
3086 /* set UAs on this device only */
3087 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3088 set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm);
3089 break;
3090 case 0x5: /* download MC, save and ACT */
3091 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm);
3092 break;
3093 case 0x6: /* download MC with offsets and ACT */
3094 /* set UAs on most devices (LUs) in this target */
3095 list_for_each_entry(dp,
3096 &devip->sdbg_host->dev_info_list,
3097 dev_list)
3098 if (dp->target == sdp->id) {
3099 set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm);
3100 if (devip != dp)
3101 set_bit(SDEBUG_UA_MICROCODE_CHANGED,
3102 dp->uas_bm);
3103 }
3104 break;
3105 case 0x7: /* download MC with offsets, save, and ACT */
3106 /* set UA on all devices (LUs) in this target */
3107 list_for_each_entry(dp,
3108 &devip->sdbg_host->dev_info_list,
3109 dev_list)
3110 if (dp->target == sdp->id)
3111 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET,
3112 dp->uas_bm);
3113 break;
3114 default:
3115 /* do nothing for this command for other mode values */
3116 break;
3117 }
3118 return 0;
3119}
3120
3121static int resp_comp_write(struct scsi_cmnd *scp,
3122 struct sdebug_dev_info *devip)
3123{
3124 u8 *cmd = scp->cmnd;
3125 u8 *arr;
3126 u8 *fake_storep_hold;
3127 u64 lba;
3128 u32 dnum;
3129 u32 lb_size = sdebug_sector_size;
3130 u8 num;
3131 unsigned long iflags;
3132 int ret;
3133 int retval = 0;
3134
3135 lba = get_unaligned_be64(cmd + 2);
3136 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */
3137 if (0 == num)
3138 return 0; /* degenerate case, not an error */
3139 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3140 (cmd[1] & 0xe0)) {
3141 mk_sense_invalid_opcode(scp);
3142 return check_condition_result;
3143 }
3144 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3145 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3146 (cmd[1] & 0xe0) == 0)
3147 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3148 "to DIF device\n");
3149
3150 /* inline check_device_access_params() */
3151 if (lba + num > sdebug_capacity) {
3152 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
3153 return check_condition_result;
3154 }
3155 /* transfer length excessive (tie in to block limits VPD page) */
3156 if (num > sdebug_store_sectors) {
3157 /* needs work to find which cdb byte 'num' comes from */
3158 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3159 return check_condition_result;
3160 }
3161 dnum = 2 * num;
3162 arr = kzalloc(dnum * lb_size, GFP_ATOMIC);
3163 if (NULL == arr) {
3164 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3165 INSUFF_RES_ASCQ);
3166 return check_condition_result;
3167 }
3168
3169 write_lock_irqsave(&atomic_rw, iflags);
3170
3171 /* trick do_device_access() to fetch both compare and write buffers
3172 * from data-in into arr. Safe (atomic) since write_lock held. */
3173 fake_storep_hold = fake_storep;
3174 fake_storep = arr;
3175 ret = do_device_access(scp, 0, dnum, true);
3176 fake_storep = fake_storep_hold;
3177 if (ret == -1) {
3178 retval = DID_ERROR << 16;
3179 goto cleanup;
3180 } else if (sdebug_verbose && (ret < (dnum * lb_size)))
3181 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb "
3182 "indicated=%u, IO sent=%d bytes\n", my_name,
3183 dnum * lb_size, ret);
3184 if (!comp_write_worker(lba, num, arr)) {
3185 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
3186 retval = check_condition_result;
3187 goto cleanup;
3188 }
3189 if (scsi_debug_lbp())
3190 map_region(lba, num);
3191cleanup:
3192 write_unlock_irqrestore(&atomic_rw, iflags);
3193 kfree(arr);
3194 return retval;
3195}
3196
3197struct unmap_block_desc {
3198 __be64 lba;
3199 __be32 blocks;
3200 __be32 __reserved;
3201};
3202
3203static int resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3204{
3205 unsigned char *buf;
3206 struct unmap_block_desc *desc;
3207 unsigned int i, payload_len, descriptors;
3208 int ret;
3209 unsigned long iflags;
3210
3211
3212 if (!scsi_debug_lbp())
3213 return 0; /* fib and say its done */
3214 payload_len = get_unaligned_be16(scp->cmnd + 7);
3215 BUG_ON(scsi_bufflen(scp) != payload_len);
3216
3217 descriptors = (payload_len - 8) / 16;
3218 if (descriptors > sdebug_unmap_max_desc) {
3219 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3220 return check_condition_result;
3221 }
3222
3223 buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC);
3224 if (!buf) {
3225 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3226 INSUFF_RES_ASCQ);
3227 return check_condition_result;
3228 }
3229
3230 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
3231
3232 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
3233 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
3234
3235 desc = (void *)&buf[8];
3236
3237 write_lock_irqsave(&atomic_rw, iflags);
3238
3239 for (i = 0 ; i < descriptors ; i++) {
3240 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
3241 unsigned int num = get_unaligned_be32(&desc[i].blocks);
3242
3243 ret = check_device_access_params(scp, lba, num);
3244 if (ret)
3245 goto out;
3246
3247 unmap_region(lba, num);
3248 }
3249
3250 ret = 0;
3251
3252out:
3253 write_unlock_irqrestore(&atomic_rw, iflags);
3254 kfree(buf);
3255
3256 return ret;
3257}
3258
3259#define SDEBUG_GET_LBA_STATUS_LEN 32
3260
3261static int resp_get_lba_status(struct scsi_cmnd *scp,
3262 struct sdebug_dev_info *devip)
3263{
3264 u8 *cmd = scp->cmnd;
3265 u64 lba;
3266 u32 alloc_len, mapped, num;
3267 u8 arr[SDEBUG_GET_LBA_STATUS_LEN];
3268 int ret;
3269
3270 lba = get_unaligned_be64(cmd + 2);
3271 alloc_len = get_unaligned_be32(cmd + 10);
3272
3273 if (alloc_len < 24)
3274 return 0;
3275
3276 ret = check_device_access_params(scp, lba, 1);
3277 if (ret)
3278 return ret;
3279
3280 if (scsi_debug_lbp())
3281 mapped = map_state(lba, &num);
3282 else {
3283 mapped = 1;
3284 /* following just in case virtual_gb changed */
3285 sdebug_capacity = get_sdebug_capacity();
3286 if (sdebug_capacity - lba <= 0xffffffff)
3287 num = sdebug_capacity - lba;
3288 else
3289 num = 0xffffffff;
3290 }
3291
3292 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
3293 put_unaligned_be32(20, arr); /* Parameter Data Length */
3294 put_unaligned_be64(lba, arr + 8); /* LBA */
3295 put_unaligned_be32(num, arr + 16); /* Number of blocks */
3296 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */
3297
3298 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN);
3299}
3300
3301#define RL_BUCKET_ELEMS 8
3302
3303/* Even though each pseudo target has a REPORT LUNS "well known logical unit"
3304 * (W-LUN), the normal Linux scanning logic does not associate it with a
3305 * device (e.g. /dev/sg7). The following magic will make that association:
3306 * "cd /sys/class/scsi_host/host<n> ; echo '- - 49409' > scan"
3307 * where <n> is a host number. If there are multiple targets in a host then
3308 * the above will associate a W-LUN to each target. To only get a W-LUN
3309 * for target 2, then use "echo '- 2 49409' > scan" .
3310 */
3311static int resp_report_luns(struct scsi_cmnd *scp,
3312 struct sdebug_dev_info *devip)
3313{
3314 unsigned char *cmd = scp->cmnd;
3315 unsigned int alloc_len;
3316 unsigned char select_report;
3317 u64 lun;
3318 struct scsi_lun *lun_p;
3319 u8 arr[RL_BUCKET_ELEMS * sizeof(struct scsi_lun)];
3320 unsigned int lun_cnt; /* normal LUN count (max: 256) */
3321 unsigned int wlun_cnt; /* report luns W-LUN count */
3322 unsigned int tlun_cnt; /* total LUN count */
3323 unsigned int rlen; /* response length (in bytes) */
3324 int k, j, n, res;
3325 unsigned int off_rsp = 0;
3326 const int sz_lun = sizeof(struct scsi_lun);
3327
3328 clear_luns_changed_on_target(devip);
3329
3330 select_report = cmd[2];
3331 alloc_len = get_unaligned_be32(cmd + 6);
3332
3333 if (alloc_len < 4) {
3334 pr_err("alloc len too small %d\n", alloc_len);
3335 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
3336 return check_condition_result;
3337 }
3338
3339 switch (select_report) {
3340 case 0: /* all LUNs apart from W-LUNs */
3341 lun_cnt = sdebug_max_luns;
3342 wlun_cnt = 0;
3343 break;
3344 case 1: /* only W-LUNs */
3345 lun_cnt = 0;
3346 wlun_cnt = 1;
3347 break;
3348 case 2: /* all LUNs */
3349 lun_cnt = sdebug_max_luns;
3350 wlun_cnt = 1;
3351 break;
3352 case 0x10: /* only administrative LUs */
3353 case 0x11: /* see SPC-5 */
3354 case 0x12: /* only subsiduary LUs owned by referenced LU */
3355 default:
3356 pr_debug("select report invalid %d\n", select_report);
3357 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
3358 return check_condition_result;
3359 }
3360
3361 if (sdebug_no_lun_0 && (lun_cnt > 0))
3362 --lun_cnt;
3363
3364 tlun_cnt = lun_cnt + wlun_cnt;
3365 rlen = tlun_cnt * sz_lun; /* excluding 8 byte header */
3366 scsi_set_resid(scp, scsi_bufflen(scp));
3367 pr_debug("select_report %d luns = %d wluns = %d no_lun0 %d\n",
3368 select_report, lun_cnt, wlun_cnt, sdebug_no_lun_0);
3369
3370 /* loops rely on sizeof response header same as sizeof lun (both 8) */
3371 lun = sdebug_no_lun_0 ? 1 : 0;
3372 for (k = 0, j = 0, res = 0; true; ++k, j = 0) {
3373 memset(arr, 0, sizeof(arr));
3374 lun_p = (struct scsi_lun *)&arr[0];
3375 if (k == 0) {
3376 put_unaligned_be32(rlen, &arr[0]);
3377 ++lun_p;
3378 j = 1;
3379 }
3380 for ( ; j < RL_BUCKET_ELEMS; ++j, ++lun_p) {
3381 if ((k * RL_BUCKET_ELEMS) + j > lun_cnt)
3382 break;
3383 int_to_scsilun(lun++, lun_p);
3384 }
3385 if (j < RL_BUCKET_ELEMS)
3386 break;
3387 n = j * sz_lun;
3388 res = p_fill_from_dev_buffer(scp, arr, n, off_rsp);
3389 if (res)
3390 return res;
3391 off_rsp += n;
3392 }
3393 if (wlun_cnt) {
3394 int_to_scsilun(SCSI_W_LUN_REPORT_LUNS, lun_p);
3395 ++j;
3396 }
3397 if (j > 0)
3398 res = p_fill_from_dev_buffer(scp, arr, j * sz_lun, off_rsp);
3399 return res;
3400}
3401
3402static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
3403 unsigned int num, struct sdebug_dev_info *devip)
3404{
3405 int j;
3406 unsigned char *kaddr, *buf;
3407 unsigned int offset;
3408 struct scsi_data_buffer *sdb = scsi_in(scp);
3409 struct sg_mapping_iter miter;
3410
3411 /* better not to use temporary buffer. */
3412 buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC);
3413 if (!buf) {
3414 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3415 INSUFF_RES_ASCQ);
3416 return check_condition_result;
3417 }
3418
3419 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
3420
3421 offset = 0;
3422 sg_miter_start(&miter, sdb->table.sgl, sdb->table.nents,
3423 SG_MITER_ATOMIC | SG_MITER_TO_SG);
3424
3425 while (sg_miter_next(&miter)) {
3426 kaddr = miter.addr;
3427 for (j = 0; j < miter.length; j++)
3428 *(kaddr + j) ^= *(buf + offset + j);
3429
3430 offset += miter.length;
3431 }
3432 sg_miter_stop(&miter);
3433 kfree(buf);
3434
3435 return 0;
3436}
3437
3438static int resp_xdwriteread_10(struct scsi_cmnd *scp,
3439 struct sdebug_dev_info *devip)
3440{
3441 u8 *cmd = scp->cmnd;
3442 u64 lba;
3443 u32 num;
3444 int errsts;
3445
3446 if (!scsi_bidi_cmnd(scp)) {
3447 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3448 INSUFF_RES_ASCQ);
3449 return check_condition_result;
3450 }
3451 errsts = resp_read_dt0(scp, devip);
3452 if (errsts)
3453 return errsts;
3454 if (!(cmd[1] & 0x4)) { /* DISABLE_WRITE is not set */
3455 errsts = resp_write_dt0(scp, devip);
3456 if (errsts)
3457 return errsts;
3458 }
3459 lba = get_unaligned_be32(cmd + 2);
3460 num = get_unaligned_be16(cmd + 7);
3461 return resp_xdwriteread(scp, lba, num, devip);
3462}
3463
3464static struct sdebug_queue *get_queue(struct scsi_cmnd *cmnd)
3465{
3466 struct sdebug_queue *sqp = sdebug_q_arr;
3467
3468 if (sdebug_mq_active) {
3469 u32 tag = blk_mq_unique_tag(cmnd->request);
3470 u16 hwq = blk_mq_unique_tag_to_hwq(tag);
3471
3472 if (unlikely(hwq >= submit_queues)) {
3473 pr_warn("Unexpected hwq=%d, apply modulo\n", hwq);
3474 hwq %= submit_queues;
3475 }
3476 pr_debug("tag=%u, hwq=%d\n", tag, hwq);
3477 return sqp + hwq;
3478 } else
3479 return sqp;
3480}
3481
3482/* Queued (deferred) command completions converge here. */
3483static void sdebug_q_cmd_complete(struct sdebug_defer *sd_dp)
3484{
3485 int qc_idx;
3486 int retiring = 0;
3487 unsigned long iflags;
3488 struct sdebug_queue *sqp;
3489 struct sdebug_queued_cmd *sqcp;
3490 struct scsi_cmnd *scp;
3491 struct sdebug_dev_info *devip;
3492
3493 qc_idx = sd_dp->qc_idx;
3494 sqp = sdebug_q_arr + sd_dp->sqa_idx;
3495 if (sdebug_statistics) {
3496 atomic_inc(&sdebug_completions);
3497 if (raw_smp_processor_id() != sd_dp->issuing_cpu)
3498 atomic_inc(&sdebug_miss_cpus);
3499 }
3500 if (unlikely((qc_idx < 0) || (qc_idx >= SDEBUG_CANQUEUE))) {
3501 pr_err("wild qc_idx=%d\n", qc_idx);
3502 return;
3503 }
3504 spin_lock_irqsave(&sqp->qc_lock, iflags);
3505 sqcp = &sqp->qc_arr[qc_idx];
3506 scp = sqcp->a_cmnd;
3507 if (unlikely(scp == NULL)) {
3508 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3509 pr_err("scp is NULL, sqa_idx=%d, qc_idx=%d\n",
3510 sd_dp->sqa_idx, qc_idx);
3511 return;
3512 }
3513 devip = (struct sdebug_dev_info *)scp->device->hostdata;
3514 if (likely(devip))
3515 atomic_dec(&devip->num_in_q);
3516 else
3517 pr_err("devip=NULL\n");
3518 if (unlikely(atomic_read(&retired_max_queue) > 0))
3519 retiring = 1;
3520
3521 sqcp->a_cmnd = NULL;
3522 if (unlikely(!test_and_clear_bit(qc_idx, sqp->in_use_bm))) {
3523 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3524 pr_err("Unexpected completion\n");
3525 return;
3526 }
3527
3528 if (unlikely(retiring)) { /* user has reduced max_queue */
3529 int k, retval;
3530
3531 retval = atomic_read(&retired_max_queue);
3532 if (qc_idx >= retval) {
3533 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3534 pr_err("index %d too large\n", retval);
3535 return;
3536 }
3537 k = find_last_bit(sqp->in_use_bm, retval);
3538 if ((k < sdebug_max_queue) || (k == retval))
3539 atomic_set(&retired_max_queue, 0);
3540 else
3541 atomic_set(&retired_max_queue, k + 1);
3542 }
3543 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3544 scp->scsi_done(scp); /* callback to mid level */
3545}
3546
3547/* When high resolution timer goes off this function is called. */
3548static enum hrtimer_restart sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
3549{
3550 struct sdebug_defer *sd_dp = container_of(timer, struct sdebug_defer,
3551 hrt);
3552 sdebug_q_cmd_complete(sd_dp);
3553 return HRTIMER_NORESTART;
3554}
3555
3556/* When work queue schedules work, it calls this function. */
3557static void sdebug_q_cmd_wq_complete(struct work_struct *work)
3558{
3559 struct sdebug_defer *sd_dp = container_of(work, struct sdebug_defer,
3560 ew.work);
3561 sdebug_q_cmd_complete(sd_dp);
3562}
3563
3564static bool got_shared_uuid;
3565static uuid_be shared_uuid;
3566
3567static struct sdebug_dev_info *sdebug_device_create(
3568 struct sdebug_host_info *sdbg_host, gfp_t flags)
3569{
3570 struct sdebug_dev_info *devip;
3571
3572 devip = kzalloc(sizeof(*devip), flags);
3573 if (devip) {
3574 if (sdebug_uuid_ctl == 1)
3575 uuid_be_gen(&devip->lu_name);
3576 else if (sdebug_uuid_ctl == 2) {
3577 if (got_shared_uuid)
3578 devip->lu_name = shared_uuid;
3579 else {
3580 uuid_be_gen(&shared_uuid);
3581 got_shared_uuid = true;
3582 devip->lu_name = shared_uuid;
3583 }
3584 }
3585 devip->sdbg_host = sdbg_host;
3586 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
3587 }
3588 return devip;
3589}
3590
3591static struct sdebug_dev_info *find_build_dev_info(struct scsi_device *sdev)
3592{
3593 struct sdebug_host_info *sdbg_host;
3594 struct sdebug_dev_info *open_devip = NULL;
3595 struct sdebug_dev_info *devip;
3596
3597 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
3598 if (!sdbg_host) {
3599 pr_err("Host info NULL\n");
3600 return NULL;
3601 }
3602 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
3603 if ((devip->used) && (devip->channel == sdev->channel) &&
3604 (devip->target == sdev->id) &&
3605 (devip->lun == sdev->lun))
3606 return devip;
3607 else {
3608 if ((!devip->used) && (!open_devip))
3609 open_devip = devip;
3610 }
3611 }
3612 if (!open_devip) { /* try and make a new one */
3613 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
3614 if (!open_devip) {
3615 pr_err("out of memory at line %d\n", __LINE__);
3616 return NULL;
3617 }
3618 }
3619
3620 open_devip->channel = sdev->channel;
3621 open_devip->target = sdev->id;
3622 open_devip->lun = sdev->lun;
3623 open_devip->sdbg_host = sdbg_host;
3624 atomic_set(&open_devip->num_in_q, 0);
3625 set_bit(SDEBUG_UA_POR, open_devip->uas_bm);
3626 open_devip->used = true;
3627 return open_devip;
3628}
3629
3630static int scsi_debug_slave_alloc(struct scsi_device *sdp)
3631{
3632 if (sdebug_verbose)
3633 pr_info("slave_alloc <%u %u %u %llu>\n",
3634 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3635 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue);
3636 return 0;
3637}
3638
3639static int scsi_debug_slave_configure(struct scsi_device *sdp)
3640{
3641 struct sdebug_dev_info *devip =
3642 (struct sdebug_dev_info *)sdp->hostdata;
3643
3644 if (sdebug_verbose)
3645 pr_info("slave_configure <%u %u %u %llu>\n",
3646 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3647 if (sdp->host->max_cmd_len != SDEBUG_MAX_CMD_LEN)
3648 sdp->host->max_cmd_len = SDEBUG_MAX_CMD_LEN;
3649 if (devip == NULL) {
3650 devip = find_build_dev_info(sdp);
3651 if (devip == NULL)
3652 return 1; /* no resources, will be marked offline */
3653 }
3654 sdp->hostdata = devip;
3655 blk_queue_max_segment_size(sdp->request_queue, -1U);
3656 if (sdebug_no_uld)
3657 sdp->no_uld_attach = 1;
3658 return 0;
3659}
3660
3661static void scsi_debug_slave_destroy(struct scsi_device *sdp)
3662{
3663 struct sdebug_dev_info *devip =
3664 (struct sdebug_dev_info *)sdp->hostdata;
3665
3666 if (sdebug_verbose)
3667 pr_info("slave_destroy <%u %u %u %llu>\n",
3668 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3669 if (devip) {
3670 /* make this slot available for re-use */
3671 devip->used = false;
3672 sdp->hostdata = NULL;
3673 }
3674}
3675
3676static void stop_qc_helper(struct sdebug_defer *sd_dp)
3677{
3678 if (!sd_dp)
3679 return;
3680 if ((sdebug_jdelay > 0) || (sdebug_ndelay > 0))
3681 hrtimer_cancel(&sd_dp->hrt);
3682 else if (sdebug_jdelay < 0)
3683 cancel_work_sync(&sd_dp->ew.work);
3684}
3685
3686/* If @cmnd found deletes its timer or work queue and returns true; else
3687 returns false */
3688static bool stop_queued_cmnd(struct scsi_cmnd *cmnd)
3689{
3690 unsigned long iflags;
3691 int j, k, qmax, r_qmax;
3692 struct sdebug_queue *sqp;
3693 struct sdebug_queued_cmd *sqcp;
3694 struct sdebug_dev_info *devip;
3695 struct sdebug_defer *sd_dp;
3696
3697 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
3698 spin_lock_irqsave(&sqp->qc_lock, iflags);
3699 qmax = sdebug_max_queue;
3700 r_qmax = atomic_read(&retired_max_queue);
3701 if (r_qmax > qmax)
3702 qmax = r_qmax;
3703 for (k = 0; k < qmax; ++k) {
3704 if (test_bit(k, sqp->in_use_bm)) {
3705 sqcp = &sqp->qc_arr[k];
3706 if (cmnd != sqcp->a_cmnd)
3707 continue;
3708 /* found */
3709 devip = (struct sdebug_dev_info *)
3710 cmnd->device->hostdata;
3711 if (devip)
3712 atomic_dec(&devip->num_in_q);
3713 sqcp->a_cmnd = NULL;
3714 sd_dp = sqcp->sd_dp;
3715 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3716 stop_qc_helper(sd_dp);
3717 clear_bit(k, sqp->in_use_bm);
3718 return true;
3719 }
3720 }
3721 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3722 }
3723 return false;
3724}
3725
3726/* Deletes (stops) timers or work queues of all queued commands */
3727static void stop_all_queued(void)
3728{
3729 unsigned long iflags;
3730 int j, k;
3731 struct sdebug_queue *sqp;
3732 struct sdebug_queued_cmd *sqcp;
3733 struct sdebug_dev_info *devip;
3734 struct sdebug_defer *sd_dp;
3735
3736 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
3737 spin_lock_irqsave(&sqp->qc_lock, iflags);
3738 for (k = 0; k < SDEBUG_CANQUEUE; ++k) {
3739 if (test_bit(k, sqp->in_use_bm)) {
3740 sqcp = &sqp->qc_arr[k];
3741 if (sqcp->a_cmnd == NULL)
3742 continue;
3743 devip = (struct sdebug_dev_info *)
3744 sqcp->a_cmnd->device->hostdata;
3745 if (devip)
3746 atomic_dec(&devip->num_in_q);
3747 sqcp->a_cmnd = NULL;
3748 sd_dp = sqcp->sd_dp;
3749 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3750 stop_qc_helper(sd_dp);
3751 clear_bit(k, sqp->in_use_bm);
3752 spin_lock_irqsave(&sqp->qc_lock, iflags);
3753 }
3754 }
3755 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3756 }
3757}
3758
3759/* Free queued command memory on heap */
3760static void free_all_queued(void)
3761{
3762 int j, k;
3763 struct sdebug_queue *sqp;
3764 struct sdebug_queued_cmd *sqcp;
3765
3766 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
3767 for (k = 0; k < SDEBUG_CANQUEUE; ++k) {
3768 sqcp = &sqp->qc_arr[k];
3769 kfree(sqcp->sd_dp);
3770 sqcp->sd_dp = NULL;
3771 }
3772 }
3773}
3774
3775static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
3776{
3777 bool ok;
3778
3779 ++num_aborts;
3780 if (SCpnt) {
3781 ok = stop_queued_cmnd(SCpnt);
3782 if (SCpnt->device && (SDEBUG_OPT_ALL_NOISE & sdebug_opts))
3783 sdev_printk(KERN_INFO, SCpnt->device,
3784 "%s: command%s found\n", __func__,
3785 ok ? "" : " not");
3786 }
3787 return SUCCESS;
3788}
3789
3790static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
3791{
3792 ++num_dev_resets;
3793 if (SCpnt && SCpnt->device) {
3794 struct scsi_device *sdp = SCpnt->device;
3795 struct sdebug_dev_info *devip =
3796 (struct sdebug_dev_info *)sdp->hostdata;
3797
3798 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
3799 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3800 if (devip)
3801 set_bit(SDEBUG_UA_POR, devip->uas_bm);
3802 }
3803 return SUCCESS;
3804}
3805
3806static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
3807{
3808 struct sdebug_host_info *sdbg_host;
3809 struct sdebug_dev_info *devip;
3810 struct scsi_device *sdp;
3811 struct Scsi_Host *hp;
3812 int k = 0;
3813
3814 ++num_target_resets;
3815 if (!SCpnt)
3816 goto lie;
3817 sdp = SCpnt->device;
3818 if (!sdp)
3819 goto lie;
3820 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
3821 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3822 hp = sdp->host;
3823 if (!hp)
3824 goto lie;
3825 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
3826 if (sdbg_host) {
3827 list_for_each_entry(devip,
3828 &sdbg_host->dev_info_list,
3829 dev_list)
3830 if (devip->target == sdp->id) {
3831 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3832 ++k;
3833 }
3834 }
3835 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
3836 sdev_printk(KERN_INFO, sdp,
3837 "%s: %d device(s) found in target\n", __func__, k);
3838lie:
3839 return SUCCESS;
3840}
3841
3842static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
3843{
3844 struct sdebug_host_info *sdbg_host;
3845 struct sdebug_dev_info *devip;
3846 struct scsi_device * sdp;
3847 struct Scsi_Host * hp;
3848 int k = 0;
3849
3850 ++num_bus_resets;
3851 if (!(SCpnt && SCpnt->device))
3852 goto lie;
3853 sdp = SCpnt->device;
3854 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
3855 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3856 hp = sdp->host;
3857 if (hp) {
3858 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
3859 if (sdbg_host) {
3860 list_for_each_entry(devip,
3861 &sdbg_host->dev_info_list,
3862 dev_list) {
3863 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3864 ++k;
3865 }
3866 }
3867 }
3868 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
3869 sdev_printk(KERN_INFO, sdp,
3870 "%s: %d device(s) found in host\n", __func__, k);
3871lie:
3872 return SUCCESS;
3873}
3874
3875static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
3876{
3877 struct sdebug_host_info * sdbg_host;
3878 struct sdebug_dev_info *devip;
3879 int k = 0;
3880
3881 ++num_host_resets;
3882 if ((SCpnt->device) && (SDEBUG_OPT_ALL_NOISE & sdebug_opts))
3883 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
3884 spin_lock(&sdebug_host_list_lock);
3885 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
3886 list_for_each_entry(devip, &sdbg_host->dev_info_list,
3887 dev_list) {
3888 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3889 ++k;
3890 }
3891 }
3892 spin_unlock(&sdebug_host_list_lock);
3893 stop_all_queued();
3894 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
3895 sdev_printk(KERN_INFO, SCpnt->device,
3896 "%s: %d device(s) found\n", __func__, k);
3897 return SUCCESS;
3898}
3899
3900static void __init sdebug_build_parts(unsigned char *ramp,
3901 unsigned long store_size)
3902{
3903 struct partition * pp;
3904 int starts[SDEBUG_MAX_PARTS + 2];
3905 int sectors_per_part, num_sectors, k;
3906 int heads_by_sects, start_sec, end_sec;
3907
3908 /* assume partition table already zeroed */
3909 if ((sdebug_num_parts < 1) || (store_size < 1048576))
3910 return;
3911 if (sdebug_num_parts > SDEBUG_MAX_PARTS) {
3912 sdebug_num_parts = SDEBUG_MAX_PARTS;
3913 pr_warn("reducing partitions to %d\n", SDEBUG_MAX_PARTS);
3914 }
3915 num_sectors = (int)sdebug_store_sectors;
3916 sectors_per_part = (num_sectors - sdebug_sectors_per)
3917 / sdebug_num_parts;
3918 heads_by_sects = sdebug_heads * sdebug_sectors_per;
3919 starts[0] = sdebug_sectors_per;
3920 for (k = 1; k < sdebug_num_parts; ++k)
3921 starts[k] = ((k * sectors_per_part) / heads_by_sects)
3922 * heads_by_sects;
3923 starts[sdebug_num_parts] = num_sectors;
3924 starts[sdebug_num_parts + 1] = 0;
3925
3926 ramp[510] = 0x55; /* magic partition markings */
3927 ramp[511] = 0xAA;
3928 pp = (struct partition *)(ramp + 0x1be);
3929 for (k = 0; starts[k + 1]; ++k, ++pp) {
3930 start_sec = starts[k];
3931 end_sec = starts[k + 1] - 1;
3932 pp->boot_ind = 0;
3933
3934 pp->cyl = start_sec / heads_by_sects;
3935 pp->head = (start_sec - (pp->cyl * heads_by_sects))
3936 / sdebug_sectors_per;
3937 pp->sector = (start_sec % sdebug_sectors_per) + 1;
3938
3939 pp->end_cyl = end_sec / heads_by_sects;
3940 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
3941 / sdebug_sectors_per;
3942 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
3943
3944 pp->start_sect = cpu_to_le32(start_sec);
3945 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
3946 pp->sys_ind = 0x83; /* plain Linux partition */
3947 }
3948}
3949
3950static void block_unblock_all_queues(bool block)
3951{
3952 int j;
3953 struct sdebug_queue *sqp;
3954
3955 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp)
3956 atomic_set(&sqp->blocked, (int)block);
3957}
3958
3959/* Adjust (by rounding down) the sdebug_cmnd_count so abs(every_nth)-1
3960 * commands will be processed normally before triggers occur.
3961 */
3962static void tweak_cmnd_count(void)
3963{
3964 int count, modulo;
3965
3966 modulo = abs(sdebug_every_nth);
3967 if (modulo < 2)
3968 return;
3969 block_unblock_all_queues(true);
3970 count = atomic_read(&sdebug_cmnd_count);
3971 atomic_set(&sdebug_cmnd_count, (count / modulo) * modulo);
3972 block_unblock_all_queues(false);
3973}
3974
3975static void clear_queue_stats(void)
3976{
3977 atomic_set(&sdebug_cmnd_count, 0);
3978 atomic_set(&sdebug_completions, 0);
3979 atomic_set(&sdebug_miss_cpus, 0);
3980 atomic_set(&sdebug_a_tsf, 0);
3981}
3982
3983static void setup_inject(struct sdebug_queue *sqp,
3984 struct sdebug_queued_cmd *sqcp)
3985{
3986 if ((atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth)) > 0)
3987 return;
3988 sqcp->inj_recovered = !!(SDEBUG_OPT_RECOVERED_ERR & sdebug_opts);
3989 sqcp->inj_transport = !!(SDEBUG_OPT_TRANSPORT_ERR & sdebug_opts);
3990 sqcp->inj_dif = !!(SDEBUG_OPT_DIF_ERR & sdebug_opts);
3991 sqcp->inj_dix = !!(SDEBUG_OPT_DIX_ERR & sdebug_opts);
3992 sqcp->inj_short = !!(SDEBUG_OPT_SHORT_TRANSFER & sdebug_opts);
3993}
3994
3995/* Complete the processing of the thread that queued a SCSI command to this
3996 * driver. It either completes the command by calling cmnd_done() or
3997 * schedules a hr timer or work queue then returns 0. Returns
3998 * SCSI_MLQUEUE_HOST_BUSY if temporarily out of resources.
3999 */
4000static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
4001 int scsi_result, int delta_jiff)
4002{
4003 unsigned long iflags;
4004 int k, num_in_q, qdepth, inject;
4005 struct sdebug_queue *sqp;
4006 struct sdebug_queued_cmd *sqcp;
4007 struct scsi_device *sdp;
4008 struct sdebug_defer *sd_dp;
4009
4010 if (unlikely(devip == NULL)) {
4011 if (scsi_result == 0)
4012 scsi_result = DID_NO_CONNECT << 16;
4013 goto respond_in_thread;
4014 }
4015 sdp = cmnd->device;
4016
4017 if (unlikely(sdebug_verbose && scsi_result))
4018 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
4019 __func__, scsi_result);
4020 if (delta_jiff == 0)
4021 goto respond_in_thread;
4022
4023 /* schedule the response at a later time if resources permit */
4024 sqp = get_queue(cmnd);
4025 spin_lock_irqsave(&sqp->qc_lock, iflags);
4026 if (unlikely(atomic_read(&sqp->blocked))) {
4027 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4028 return SCSI_MLQUEUE_HOST_BUSY;
4029 }
4030 num_in_q = atomic_read(&devip->num_in_q);
4031 qdepth = cmnd->device->queue_depth;
4032 inject = 0;
4033 if (unlikely((qdepth > 0) && (num_in_q >= qdepth))) {
4034 if (scsi_result) {
4035 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4036 goto respond_in_thread;
4037 } else
4038 scsi_result = device_qfull_result;
4039 } else if (unlikely(sdebug_every_nth &&
4040 (SDEBUG_OPT_RARE_TSF & sdebug_opts) &&
4041 (scsi_result == 0))) {
4042 if ((num_in_q == (qdepth - 1)) &&
4043 (atomic_inc_return(&sdebug_a_tsf) >=
4044 abs(sdebug_every_nth))) {
4045 atomic_set(&sdebug_a_tsf, 0);
4046 inject = 1;
4047 scsi_result = device_qfull_result;
4048 }
4049 }
4050
4051 k = find_first_zero_bit(sqp->in_use_bm, sdebug_max_queue);
4052 if (unlikely(k >= sdebug_max_queue)) {
4053 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4054 if (scsi_result)
4055 goto respond_in_thread;
4056 else if (SDEBUG_OPT_ALL_TSF & sdebug_opts)
4057 scsi_result = device_qfull_result;
4058 if (SDEBUG_OPT_Q_NOISE & sdebug_opts)
4059 sdev_printk(KERN_INFO, sdp,
4060 "%s: max_queue=%d exceeded, %s\n",
4061 __func__, sdebug_max_queue,
4062 (scsi_result ? "status: TASK SET FULL" :
4063 "report: host busy"));
4064 if (scsi_result)
4065 goto respond_in_thread;
4066 else
4067 return SCSI_MLQUEUE_HOST_BUSY;
4068 }
4069 __set_bit(k, sqp->in_use_bm);
4070 atomic_inc(&devip->num_in_q);
4071 sqcp = &sqp->qc_arr[k];
4072 sqcp->a_cmnd = cmnd;
4073 cmnd->host_scribble = (unsigned char *)sqcp;
4074 cmnd->result = scsi_result;
4075 sd_dp = sqcp->sd_dp;
4076 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4077 if (unlikely(sdebug_every_nth && sdebug_any_injecting_opt))
4078 setup_inject(sqp, sqcp);
4079 if (delta_jiff > 0 || sdebug_ndelay > 0) {
4080 ktime_t kt;
4081
4082 if (delta_jiff > 0) {
4083 struct timespec ts;
4084
4085 jiffies_to_timespec(delta_jiff, &ts);
4086 kt = ktime_set(ts.tv_sec, ts.tv_nsec);
4087 } else
4088 kt = sdebug_ndelay;
4089 if (NULL == sd_dp) {
4090 sd_dp = kzalloc(sizeof(*sd_dp), GFP_ATOMIC);
4091 if (NULL == sd_dp)
4092 return SCSI_MLQUEUE_HOST_BUSY;
4093 sqcp->sd_dp = sd_dp;
4094 hrtimer_init(&sd_dp->hrt, CLOCK_MONOTONIC,
4095 HRTIMER_MODE_REL_PINNED);
4096 sd_dp->hrt.function = sdebug_q_cmd_hrt_complete;
4097 sd_dp->sqa_idx = sqp - sdebug_q_arr;
4098 sd_dp->qc_idx = k;
4099 }
4100 if (sdebug_statistics)
4101 sd_dp->issuing_cpu = raw_smp_processor_id();
4102 hrtimer_start(&sd_dp->hrt, kt, HRTIMER_MODE_REL_PINNED);
4103 } else { /* jdelay < 0, use work queue */
4104 if (NULL == sd_dp) {
4105 sd_dp = kzalloc(sizeof(*sqcp->sd_dp), GFP_ATOMIC);
4106 if (NULL == sd_dp)
4107 return SCSI_MLQUEUE_HOST_BUSY;
4108 sqcp->sd_dp = sd_dp;
4109 sd_dp->sqa_idx = sqp - sdebug_q_arr;
4110 sd_dp->qc_idx = k;
4111 INIT_WORK(&sd_dp->ew.work, sdebug_q_cmd_wq_complete);
4112 }
4113 if (sdebug_statistics)
4114 sd_dp->issuing_cpu = raw_smp_processor_id();
4115 schedule_work(&sd_dp->ew.work);
4116 }
4117 if (unlikely((SDEBUG_OPT_Q_NOISE & sdebug_opts) &&
4118 (scsi_result == device_qfull_result)))
4119 sdev_printk(KERN_INFO, sdp,
4120 "%s: num_in_q=%d +1, %s%s\n", __func__,
4121 num_in_q, (inject ? "<inject> " : ""),
4122 "status: TASK SET FULL");
4123 return 0;
4124
4125respond_in_thread: /* call back to mid-layer using invocation thread */
4126 cmnd->result = scsi_result;
4127 cmnd->scsi_done(cmnd);
4128 return 0;
4129}
4130
4131/* Note: The following macros create attribute files in the
4132 /sys/module/scsi_debug/parameters directory. Unfortunately this
4133 driver is unaware of a change and cannot trigger auxiliary actions
4134 as it can when the corresponding attribute in the
4135 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
4136 */
4137module_param_named(add_host, sdebug_add_host, int, S_IRUGO | S_IWUSR);
4138module_param_named(ato, sdebug_ato, int, S_IRUGO);
4139module_param_named(clustering, sdebug_clustering, bool, S_IRUGO | S_IWUSR);
4140module_param_named(delay, sdebug_jdelay, int, S_IRUGO | S_IWUSR);
4141module_param_named(dev_size_mb, sdebug_dev_size_mb, int, S_IRUGO);
4142module_param_named(dif, sdebug_dif, int, S_IRUGO);
4143module_param_named(dix, sdebug_dix, int, S_IRUGO);
4144module_param_named(dsense, sdebug_dsense, int, S_IRUGO | S_IWUSR);
4145module_param_named(every_nth, sdebug_every_nth, int, S_IRUGO | S_IWUSR);
4146module_param_named(fake_rw, sdebug_fake_rw, int, S_IRUGO | S_IWUSR);
4147module_param_named(guard, sdebug_guard, uint, S_IRUGO);
4148module_param_named(host_lock, sdebug_host_lock, bool, S_IRUGO | S_IWUSR);
4149module_param_named(lbpu, sdebug_lbpu, int, S_IRUGO);
4150module_param_named(lbpws, sdebug_lbpws, int, S_IRUGO);
4151module_param_named(lbpws10, sdebug_lbpws10, int, S_IRUGO);
4152module_param_named(lbprz, sdebug_lbprz, int, S_IRUGO);
4153module_param_named(lowest_aligned, sdebug_lowest_aligned, int, S_IRUGO);
4154module_param_named(max_luns, sdebug_max_luns, int, S_IRUGO | S_IWUSR);
4155module_param_named(max_queue, sdebug_max_queue, int, S_IRUGO | S_IWUSR);
4156module_param_named(ndelay, sdebug_ndelay, int, S_IRUGO | S_IWUSR);
4157module_param_named(no_lun_0, sdebug_no_lun_0, int, S_IRUGO | S_IWUSR);
4158module_param_named(no_uld, sdebug_no_uld, int, S_IRUGO);
4159module_param_named(num_parts, sdebug_num_parts, int, S_IRUGO);
4160module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR);
4161module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO);
4162module_param_named(opts, sdebug_opts, int, S_IRUGO | S_IWUSR);
4163module_param_named(physblk_exp, sdebug_physblk_exp, int, S_IRUGO);
4164module_param_named(ptype, sdebug_ptype, int, S_IRUGO | S_IWUSR);
4165module_param_named(removable, sdebug_removable, bool, S_IRUGO | S_IWUSR);
4166module_param_named(scsi_level, sdebug_scsi_level, int, S_IRUGO);
4167module_param_named(sector_size, sdebug_sector_size, int, S_IRUGO);
4168module_param_named(statistics, sdebug_statistics, bool, S_IRUGO | S_IWUSR);
4169module_param_named(strict, sdebug_strict, bool, S_IRUGO | S_IWUSR);
4170module_param_named(submit_queues, submit_queues, int, S_IRUGO);
4171module_param_named(unmap_alignment, sdebug_unmap_alignment, int, S_IRUGO);
4172module_param_named(unmap_granularity, sdebug_unmap_granularity, int, S_IRUGO);
4173module_param_named(unmap_max_blocks, sdebug_unmap_max_blocks, int, S_IRUGO);
4174module_param_named(unmap_max_desc, sdebug_unmap_max_desc, int, S_IRUGO);
4175module_param_named(virtual_gb, sdebug_virtual_gb, int, S_IRUGO | S_IWUSR);
4176module_param_named(uuid_ctl, sdebug_uuid_ctl, int, S_IRUGO);
4177module_param_named(vpd_use_hostno, sdebug_vpd_use_hostno, int,
4178 S_IRUGO | S_IWUSR);
4179module_param_named(write_same_length, sdebug_write_same_length, int,
4180 S_IRUGO | S_IWUSR);
4181
4182MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
4183MODULE_DESCRIPTION("SCSI debug adapter driver");
4184MODULE_LICENSE("GPL");
4185MODULE_VERSION(SDEBUG_VERSION);
4186
4187MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
4188MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
4189MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
4190MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
4191MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)");
4192MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
4193MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
4194MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
4195MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
4196MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
4197MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
4198MODULE_PARM_DESC(host_lock, "host_lock is ignored (def=0)");
4199MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
4200MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
4201MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
4202MODULE_PARM_DESC(lbprz,
4203 "on read unmapped LBs return 0 when 1 (def), return 0xff when 2");
4204MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
4205MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
4206MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
4207MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
4208MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
4209MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
4210MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
4211MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
4212MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)");
4213MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
4214MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
4215MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
4216MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
4217MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=7[SPC-5])");
4218MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
4219MODULE_PARM_DESC(statistics, "collect statistics on commands, queues (def=0)");
4220MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)");
4221MODULE_PARM_DESC(submit_queues, "support for block multi-queue (def=1)");
4222MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
4223MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
4224MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
4225MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
4226MODULE_PARM_DESC(uuid_ctl,
4227 "1->use uuid for lu name, 0->don't, 2->all use same (def=0)");
4228MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)");
4229MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
4230MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
4231
4232#define SDEBUG_INFO_LEN 256
4233static char sdebug_info[SDEBUG_INFO_LEN];
4234
4235static const char * scsi_debug_info(struct Scsi_Host * shp)
4236{
4237 int k;
4238
4239 k = scnprintf(sdebug_info, SDEBUG_INFO_LEN, "%s: version %s [%s]\n",
4240 my_name, SDEBUG_VERSION, sdebug_version_date);
4241 if (k >= (SDEBUG_INFO_LEN - 1))
4242 return sdebug_info;
4243 scnprintf(sdebug_info + k, SDEBUG_INFO_LEN - k,
4244 " dev_size_mb=%d, opts=0x%x, submit_queues=%d, %s=%d",
4245 sdebug_dev_size_mb, sdebug_opts, submit_queues,
4246 "statistics", (int)sdebug_statistics);
4247 return sdebug_info;
4248}
4249
4250/* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */
4251static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer,
4252 int length)
4253{
4254 char arr[16];
4255 int opts;
4256 int minLen = length > 15 ? 15 : length;
4257
4258 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
4259 return -EACCES;
4260 memcpy(arr, buffer, minLen);
4261 arr[minLen] = '\0';
4262 if (1 != sscanf(arr, "%d", &opts))
4263 return -EINVAL;
4264 sdebug_opts = opts;
4265 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
4266 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
4267 if (sdebug_every_nth != 0)
4268 tweak_cmnd_count();
4269 return length;
4270}
4271
4272/* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the
4273 * same for each scsi_debug host (if more than one). Some of the counters
4274 * output are not atomics so might be inaccurate in a busy system. */
4275static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
4276{
4277 int f, j, l;
4278 struct sdebug_queue *sqp;
4279
4280 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n",
4281 SDEBUG_VERSION, sdebug_version_date);
4282 seq_printf(m, "num_tgts=%d, %ssize=%d MB, opts=0x%x, every_nth=%d\n",
4283 sdebug_num_tgts, "shared (ram) ", sdebug_dev_size_mb,
4284 sdebug_opts, sdebug_every_nth);
4285 seq_printf(m, "delay=%d, ndelay=%d, max_luns=%d, sector_size=%d %s\n",
4286 sdebug_jdelay, sdebug_ndelay, sdebug_max_luns,
4287 sdebug_sector_size, "bytes");
4288 seq_printf(m, "cylinders=%d, heads=%d, sectors=%d, command aborts=%d\n",
4289 sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per,
4290 num_aborts);
4291 seq_printf(m, "RESETs: device=%d, target=%d, bus=%d, host=%d\n",
4292 num_dev_resets, num_target_resets, num_bus_resets,
4293 num_host_resets);
4294 seq_printf(m, "dix_reads=%d, dix_writes=%d, dif_errors=%d\n",
4295 dix_reads, dix_writes, dif_errors);
4296 seq_printf(m, "usec_in_jiffy=%lu, %s=%d, mq_active=%d\n",
4297 TICK_NSEC / 1000, "statistics", sdebug_statistics,
4298 sdebug_mq_active);
4299 seq_printf(m, "cmnd_count=%d, completions=%d, %s=%d, a_tsf=%d\n",
4300 atomic_read(&sdebug_cmnd_count),
4301 atomic_read(&sdebug_completions),
4302 "miss_cpus", atomic_read(&sdebug_miss_cpus),
4303 atomic_read(&sdebug_a_tsf));
4304
4305 seq_printf(m, "submit_queues=%d\n", submit_queues);
4306 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
4307 seq_printf(m, " queue %d:\n", j);
4308 f = find_first_bit(sqp->in_use_bm, sdebug_max_queue);
4309 if (f != sdebug_max_queue) {
4310 l = find_last_bit(sqp->in_use_bm, sdebug_max_queue);
4311 seq_printf(m, " in_use_bm BUSY: %s: %d,%d\n",
4312 "first,last bits", f, l);
4313 }
4314 }
4315 return 0;
4316}
4317
4318static ssize_t delay_show(struct device_driver *ddp, char *buf)
4319{
4320 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_jdelay);
4321}
4322/* Returns -EBUSY if jdelay is being changed and commands are queued. The unit
4323 * of delay is jiffies.
4324 */
4325static ssize_t delay_store(struct device_driver *ddp, const char *buf,
4326 size_t count)
4327{
4328 int jdelay, res;
4329
4330 if (count > 0 && sscanf(buf, "%d", &jdelay) == 1) {
4331 res = count;
4332 if (sdebug_jdelay != jdelay) {
4333 int j, k;
4334 struct sdebug_queue *sqp;
4335
4336 block_unblock_all_queues(true);
4337 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
4338 ++j, ++sqp) {
4339 k = find_first_bit(sqp->in_use_bm,
4340 sdebug_max_queue);
4341 if (k != sdebug_max_queue) {
4342 res = -EBUSY; /* queued commands */
4343 break;
4344 }
4345 }
4346 if (res > 0) {
4347 /* make sure sdebug_defer instances get
4348 * re-allocated for new delay variant */
4349 free_all_queued();
4350 sdebug_jdelay = jdelay;
4351 sdebug_ndelay = 0;
4352 }
4353 block_unblock_all_queues(false);
4354 }
4355 return res;
4356 }
4357 return -EINVAL;
4358}
4359static DRIVER_ATTR_RW(delay);
4360
4361static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
4362{
4363 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ndelay);
4364}
4365/* Returns -EBUSY if ndelay is being changed and commands are queued */
4366/* If > 0 and accepted then sdebug_jdelay is set to JDELAY_OVERRIDDEN */
4367static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
4368 size_t count)
4369{
4370 int ndelay, res;
4371
4372 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
4373 (ndelay >= 0) && (ndelay < (1000 * 1000 * 1000))) {
4374 res = count;
4375 if (sdebug_ndelay != ndelay) {
4376 int j, k;
4377 struct sdebug_queue *sqp;
4378
4379 block_unblock_all_queues(true);
4380 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
4381 ++j, ++sqp) {
4382 k = find_first_bit(sqp->in_use_bm,
4383 sdebug_max_queue);
4384 if (k != sdebug_max_queue) {
4385 res = -EBUSY; /* queued commands */
4386 break;
4387 }
4388 }
4389 if (res > 0) {
4390 /* make sure sdebug_defer instances get
4391 * re-allocated for new delay variant */
4392 free_all_queued();
4393 sdebug_ndelay = ndelay;
4394 sdebug_jdelay = ndelay ? JDELAY_OVERRIDDEN
4395 : DEF_JDELAY;
4396 }
4397 block_unblock_all_queues(false);
4398 }
4399 return res;
4400 }
4401 return -EINVAL;
4402}
4403static DRIVER_ATTR_RW(ndelay);
4404
4405static ssize_t opts_show(struct device_driver *ddp, char *buf)
4406{
4407 return scnprintf(buf, PAGE_SIZE, "0x%x\n", sdebug_opts);
4408}
4409
4410static ssize_t opts_store(struct device_driver *ddp, const char *buf,
4411 size_t count)
4412{
4413 int opts;
4414 char work[20];
4415
4416 if (1 == sscanf(buf, "%10s", work)) {
4417 if (0 == strncasecmp(work,"0x", 2)) {
4418 if (1 == sscanf(&work[2], "%x", &opts))
4419 goto opts_done;
4420 } else {
4421 if (1 == sscanf(work, "%d", &opts))
4422 goto opts_done;
4423 }
4424 }
4425 return -EINVAL;
4426opts_done:
4427 sdebug_opts = opts;
4428 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
4429 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
4430 tweak_cmnd_count();
4431 return count;
4432}
4433static DRIVER_ATTR_RW(opts);
4434
4435static ssize_t ptype_show(struct device_driver *ddp, char *buf)
4436{
4437 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ptype);
4438}
4439static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
4440 size_t count)
4441{
4442 int n;
4443
4444 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4445 sdebug_ptype = n;
4446 return count;
4447 }
4448 return -EINVAL;
4449}
4450static DRIVER_ATTR_RW(ptype);
4451
4452static ssize_t dsense_show(struct device_driver *ddp, char *buf)
4453{
4454 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dsense);
4455}
4456static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
4457 size_t count)
4458{
4459 int n;
4460
4461 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4462 sdebug_dsense = n;
4463 return count;
4464 }
4465 return -EINVAL;
4466}
4467static DRIVER_ATTR_RW(dsense);
4468
4469static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
4470{
4471 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_fake_rw);
4472}
4473static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
4474 size_t count)
4475{
4476 int n;
4477
4478 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4479 n = (n > 0);
4480 sdebug_fake_rw = (sdebug_fake_rw > 0);
4481 if (sdebug_fake_rw != n) {
4482 if ((0 == n) && (NULL == fake_storep)) {
4483 unsigned long sz =
4484 (unsigned long)sdebug_dev_size_mb *
4485 1048576;
4486
4487 fake_storep = vmalloc(sz);
4488 if (NULL == fake_storep) {
4489 pr_err("out of memory, 9\n");
4490 return -ENOMEM;
4491 }
4492 memset(fake_storep, 0, sz);
4493 }
4494 sdebug_fake_rw = n;
4495 }
4496 return count;
4497 }
4498 return -EINVAL;
4499}
4500static DRIVER_ATTR_RW(fake_rw);
4501
4502static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
4503{
4504 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_lun_0);
4505}
4506static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
4507 size_t count)
4508{
4509 int n;
4510
4511 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4512 sdebug_no_lun_0 = n;
4513 return count;
4514 }
4515 return -EINVAL;
4516}
4517static DRIVER_ATTR_RW(no_lun_0);
4518
4519static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
4520{
4521 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_tgts);
4522}
4523static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
4524 size_t count)
4525{
4526 int n;
4527
4528 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4529 sdebug_num_tgts = n;
4530 sdebug_max_tgts_luns();
4531 return count;
4532 }
4533 return -EINVAL;
4534}
4535static DRIVER_ATTR_RW(num_tgts);
4536
4537static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
4538{
4539 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dev_size_mb);
4540}
4541static DRIVER_ATTR_RO(dev_size_mb);
4542
4543static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
4544{
4545 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_parts);
4546}
4547static DRIVER_ATTR_RO(num_parts);
4548
4549static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
4550{
4551 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_every_nth);
4552}
4553static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
4554 size_t count)
4555{
4556 int nth;
4557
4558 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
4559 sdebug_every_nth = nth;
4560 if (nth && !sdebug_statistics) {
4561 pr_info("every_nth needs statistics=1, set it\n");
4562 sdebug_statistics = true;
4563 }
4564 tweak_cmnd_count();
4565 return count;
4566 }
4567 return -EINVAL;
4568}
4569static DRIVER_ATTR_RW(every_nth);
4570
4571static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
4572{
4573 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_luns);
4574}
4575static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
4576 size_t count)
4577{
4578 int n;
4579 bool changed;
4580
4581 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4582 if (n > 256) {
4583 pr_warn("max_luns can be no more than 256\n");
4584 return -EINVAL;
4585 }
4586 changed = (sdebug_max_luns != n);
4587 sdebug_max_luns = n;
4588 sdebug_max_tgts_luns();
4589 if (changed && (sdebug_scsi_level >= 5)) { /* >= SPC-3 */
4590 struct sdebug_host_info *sdhp;
4591 struct sdebug_dev_info *dp;
4592
4593 spin_lock(&sdebug_host_list_lock);
4594 list_for_each_entry(sdhp, &sdebug_host_list,
4595 host_list) {
4596 list_for_each_entry(dp, &sdhp->dev_info_list,
4597 dev_list) {
4598 set_bit(SDEBUG_UA_LUNS_CHANGED,
4599 dp->uas_bm);
4600 }
4601 }
4602 spin_unlock(&sdebug_host_list_lock);
4603 }
4604 return count;
4605 }
4606 return -EINVAL;
4607}
4608static DRIVER_ATTR_RW(max_luns);
4609
4610static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
4611{
4612 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_queue);
4613}
4614/* N.B. max_queue can be changed while there are queued commands. In flight
4615 * commands beyond the new max_queue will be completed. */
4616static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
4617 size_t count)
4618{
4619 int j, n, k, a;
4620 struct sdebug_queue *sqp;
4621
4622 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
4623 (n <= SDEBUG_CANQUEUE)) {
4624 block_unblock_all_queues(true);
4625 k = 0;
4626 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
4627 ++j, ++sqp) {
4628 a = find_last_bit(sqp->in_use_bm, SDEBUG_CANQUEUE);
4629 if (a > k)
4630 k = a;
4631 }
4632 sdebug_max_queue = n;
4633 if (k == SDEBUG_CANQUEUE)
4634 atomic_set(&retired_max_queue, 0);
4635 else if (k >= n)
4636 atomic_set(&retired_max_queue, k + 1);
4637 else
4638 atomic_set(&retired_max_queue, 0);
4639 block_unblock_all_queues(false);
4640 return count;
4641 }
4642 return -EINVAL;
4643}
4644static DRIVER_ATTR_RW(max_queue);
4645
4646static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
4647{
4648 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_uld);
4649}
4650static DRIVER_ATTR_RO(no_uld);
4651
4652static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
4653{
4654 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_scsi_level);
4655}
4656static DRIVER_ATTR_RO(scsi_level);
4657
4658static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
4659{
4660 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_virtual_gb);
4661}
4662static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
4663 size_t count)
4664{
4665 int n;
4666 bool changed;
4667
4668 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4669 changed = (sdebug_virtual_gb != n);
4670 sdebug_virtual_gb = n;
4671 sdebug_capacity = get_sdebug_capacity();
4672 if (changed) {
4673 struct sdebug_host_info *sdhp;
4674 struct sdebug_dev_info *dp;
4675
4676 spin_lock(&sdebug_host_list_lock);
4677 list_for_each_entry(sdhp, &sdebug_host_list,
4678 host_list) {
4679 list_for_each_entry(dp, &sdhp->dev_info_list,
4680 dev_list) {
4681 set_bit(SDEBUG_UA_CAPACITY_CHANGED,
4682 dp->uas_bm);
4683 }
4684 }
4685 spin_unlock(&sdebug_host_list_lock);
4686 }
4687 return count;
4688 }
4689 return -EINVAL;
4690}
4691static DRIVER_ATTR_RW(virtual_gb);
4692
4693static ssize_t add_host_show(struct device_driver *ddp, char *buf)
4694{
4695 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_add_host);
4696}
4697
4698static int sdebug_add_adapter(void);
4699static void sdebug_remove_adapter(void);
4700
4701static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
4702 size_t count)
4703{
4704 int delta_hosts;
4705
4706 if (sscanf(buf, "%d", &delta_hosts) != 1)
4707 return -EINVAL;
4708 if (delta_hosts > 0) {
4709 do {
4710 sdebug_add_adapter();
4711 } while (--delta_hosts);
4712 } else if (delta_hosts < 0) {
4713 do {
4714 sdebug_remove_adapter();
4715 } while (++delta_hosts);
4716 }
4717 return count;
4718}
4719static DRIVER_ATTR_RW(add_host);
4720
4721static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
4722{
4723 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_vpd_use_hostno);
4724}
4725static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
4726 size_t count)
4727{
4728 int n;
4729
4730 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4731 sdebug_vpd_use_hostno = n;
4732 return count;
4733 }
4734 return -EINVAL;
4735}
4736static DRIVER_ATTR_RW(vpd_use_hostno);
4737
4738static ssize_t statistics_show(struct device_driver *ddp, char *buf)
4739{
4740 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_statistics);
4741}
4742static ssize_t statistics_store(struct device_driver *ddp, const char *buf,
4743 size_t count)
4744{
4745 int n;
4746
4747 if ((count > 0) && (sscanf(buf, "%d", &n) == 1) && (n >= 0)) {
4748 if (n > 0)
4749 sdebug_statistics = true;
4750 else {
4751 clear_queue_stats();
4752 sdebug_statistics = false;
4753 }
4754 return count;
4755 }
4756 return -EINVAL;
4757}
4758static DRIVER_ATTR_RW(statistics);
4759
4760static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
4761{
4762 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_sector_size);
4763}
4764static DRIVER_ATTR_RO(sector_size);
4765
4766static ssize_t submit_queues_show(struct device_driver *ddp, char *buf)
4767{
4768 return scnprintf(buf, PAGE_SIZE, "%d\n", submit_queues);
4769}
4770static DRIVER_ATTR_RO(submit_queues);
4771
4772static ssize_t dix_show(struct device_driver *ddp, char *buf)
4773{
4774 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dix);
4775}
4776static DRIVER_ATTR_RO(dix);
4777
4778static ssize_t dif_show(struct device_driver *ddp, char *buf)
4779{
4780 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dif);
4781}
4782static DRIVER_ATTR_RO(dif);
4783
4784static ssize_t guard_show(struct device_driver *ddp, char *buf)
4785{
4786 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_guard);
4787}
4788static DRIVER_ATTR_RO(guard);
4789
4790static ssize_t ato_show(struct device_driver *ddp, char *buf)
4791{
4792 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ato);
4793}
4794static DRIVER_ATTR_RO(ato);
4795
4796static ssize_t map_show(struct device_driver *ddp, char *buf)
4797{
4798 ssize_t count;
4799
4800 if (!scsi_debug_lbp())
4801 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
4802 sdebug_store_sectors);
4803
4804 count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
4805 (int)map_size, map_storep);
4806 buf[count++] = '\n';
4807 buf[count] = '\0';
4808
4809 return count;
4810}
4811static DRIVER_ATTR_RO(map);
4812
4813static ssize_t removable_show(struct device_driver *ddp, char *buf)
4814{
4815 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_removable ? 1 : 0);
4816}
4817static ssize_t removable_store(struct device_driver *ddp, const char *buf,
4818 size_t count)
4819{
4820 int n;
4821
4822 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4823 sdebug_removable = (n > 0);
4824 return count;
4825 }
4826 return -EINVAL;
4827}
4828static DRIVER_ATTR_RW(removable);
4829
4830static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
4831{
4832 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_host_lock);
4833}
4834/* N.B. sdebug_host_lock does nothing, kept for backward compatibility */
4835static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
4836 size_t count)
4837{
4838 int n;
4839
4840 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4841 sdebug_host_lock = (n > 0);
4842 return count;
4843 }
4844 return -EINVAL;
4845}
4846static DRIVER_ATTR_RW(host_lock);
4847
4848static ssize_t strict_show(struct device_driver *ddp, char *buf)
4849{
4850 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_strict);
4851}
4852static ssize_t strict_store(struct device_driver *ddp, const char *buf,
4853 size_t count)
4854{
4855 int n;
4856
4857 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4858 sdebug_strict = (n > 0);
4859 return count;
4860 }
4861 return -EINVAL;
4862}
4863static DRIVER_ATTR_RW(strict);
4864
4865static ssize_t uuid_ctl_show(struct device_driver *ddp, char *buf)
4866{
4867 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_uuid_ctl);
4868}
4869static DRIVER_ATTR_RO(uuid_ctl);
4870
4871
4872/* Note: The following array creates attribute files in the
4873 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
4874 files (over those found in the /sys/module/scsi_debug/parameters
4875 directory) is that auxiliary actions can be triggered when an attribute
4876 is changed. For example see: sdebug_add_host_store() above.
4877 */
4878
4879static struct attribute *sdebug_drv_attrs[] = {
4880 &driver_attr_delay.attr,
4881 &driver_attr_opts.attr,
4882 &driver_attr_ptype.attr,
4883 &driver_attr_dsense.attr,
4884 &driver_attr_fake_rw.attr,
4885 &driver_attr_no_lun_0.attr,
4886 &driver_attr_num_tgts.attr,
4887 &driver_attr_dev_size_mb.attr,
4888 &driver_attr_num_parts.attr,
4889 &driver_attr_every_nth.attr,
4890 &driver_attr_max_luns.attr,
4891 &driver_attr_max_queue.attr,
4892 &driver_attr_no_uld.attr,
4893 &driver_attr_scsi_level.attr,
4894 &driver_attr_virtual_gb.attr,
4895 &driver_attr_add_host.attr,
4896 &driver_attr_vpd_use_hostno.attr,
4897 &driver_attr_sector_size.attr,
4898 &driver_attr_statistics.attr,
4899 &driver_attr_submit_queues.attr,
4900 &driver_attr_dix.attr,
4901 &driver_attr_dif.attr,
4902 &driver_attr_guard.attr,
4903 &driver_attr_ato.attr,
4904 &driver_attr_map.attr,
4905 &driver_attr_removable.attr,
4906 &driver_attr_host_lock.attr,
4907 &driver_attr_ndelay.attr,
4908 &driver_attr_strict.attr,
4909 &driver_attr_uuid_ctl.attr,
4910 NULL,
4911};
4912ATTRIBUTE_GROUPS(sdebug_drv);
4913
4914static struct device *pseudo_primary;
4915
4916static int __init scsi_debug_init(void)
4917{
4918 unsigned long sz;
4919 int host_to_add;
4920 int k;
4921 int ret;
4922
4923 atomic_set(&retired_max_queue, 0);
4924
4925 if (sdebug_ndelay >= 1000 * 1000 * 1000) {
4926 pr_warn("ndelay must be less than 1 second, ignored\n");
4927 sdebug_ndelay = 0;
4928 } else if (sdebug_ndelay > 0)
4929 sdebug_jdelay = JDELAY_OVERRIDDEN;
4930
4931 switch (sdebug_sector_size) {
4932 case 512:
4933 case 1024:
4934 case 2048:
4935 case 4096:
4936 break;
4937 default:
4938 pr_err("invalid sector_size %d\n", sdebug_sector_size);
4939 return -EINVAL;
4940 }
4941
4942 switch (sdebug_dif) {
4943 case T10_PI_TYPE0_PROTECTION:
4944 break;
4945 case T10_PI_TYPE1_PROTECTION:
4946 case T10_PI_TYPE2_PROTECTION:
4947 case T10_PI_TYPE3_PROTECTION:
4948 have_dif_prot = true;
4949 break;
4950
4951 default:
4952 pr_err("dif must be 0, 1, 2 or 3\n");
4953 return -EINVAL;
4954 }
4955
4956 if (sdebug_guard > 1) {
4957 pr_err("guard must be 0 or 1\n");
4958 return -EINVAL;
4959 }
4960
4961 if (sdebug_ato > 1) {
4962 pr_err("ato must be 0 or 1\n");
4963 return -EINVAL;
4964 }
4965
4966 if (sdebug_physblk_exp > 15) {
4967 pr_err("invalid physblk_exp %u\n", sdebug_physblk_exp);
4968 return -EINVAL;
4969 }
4970 if (sdebug_max_luns > 256) {
4971 pr_warn("max_luns can be no more than 256, use default\n");
4972 sdebug_max_luns = DEF_MAX_LUNS;
4973 }
4974
4975 if (sdebug_lowest_aligned > 0x3fff) {
4976 pr_err("lowest_aligned too big: %u\n", sdebug_lowest_aligned);
4977 return -EINVAL;
4978 }
4979
4980 if (submit_queues < 1) {
4981 pr_err("submit_queues must be 1 or more\n");
4982 return -EINVAL;
4983 }
4984 sdebug_q_arr = kcalloc(submit_queues, sizeof(struct sdebug_queue),
4985 GFP_KERNEL);
4986 if (sdebug_q_arr == NULL)
4987 return -ENOMEM;
4988 for (k = 0; k < submit_queues; ++k)
4989 spin_lock_init(&sdebug_q_arr[k].qc_lock);
4990
4991 if (sdebug_dev_size_mb < 1)
4992 sdebug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
4993 sz = (unsigned long)sdebug_dev_size_mb * 1048576;
4994 sdebug_store_sectors = sz / sdebug_sector_size;
4995 sdebug_capacity = get_sdebug_capacity();
4996
4997 /* play around with geometry, don't waste too much on track 0 */
4998 sdebug_heads = 8;
4999 sdebug_sectors_per = 32;
5000 if (sdebug_dev_size_mb >= 256)
5001 sdebug_heads = 64;
5002 else if (sdebug_dev_size_mb >= 16)
5003 sdebug_heads = 32;
5004 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
5005 (sdebug_sectors_per * sdebug_heads);
5006 if (sdebug_cylinders_per >= 1024) {
5007 /* other LLDs do this; implies >= 1GB ram disk ... */
5008 sdebug_heads = 255;
5009 sdebug_sectors_per = 63;
5010 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
5011 (sdebug_sectors_per * sdebug_heads);
5012 }
5013
5014 if (sdebug_fake_rw == 0) {
5015 fake_storep = vmalloc(sz);
5016 if (NULL == fake_storep) {
5017 pr_err("out of memory, 1\n");
5018 ret = -ENOMEM;
5019 goto free_q_arr;
5020 }
5021 memset(fake_storep, 0, sz);
5022 if (sdebug_num_parts > 0)
5023 sdebug_build_parts(fake_storep, sz);
5024 }
5025
5026 if (sdebug_dix) {
5027 int dif_size;
5028
5029 dif_size = sdebug_store_sectors * sizeof(struct t10_pi_tuple);
5030 dif_storep = vmalloc(dif_size);
5031
5032 pr_err("dif_storep %u bytes @ %p\n", dif_size, dif_storep);
5033
5034 if (dif_storep == NULL) {
5035 pr_err("out of mem. (DIX)\n");
5036 ret = -ENOMEM;
5037 goto free_vm;
5038 }
5039
5040 memset(dif_storep, 0xff, dif_size);
5041 }
5042
5043 /* Logical Block Provisioning */
5044 if (scsi_debug_lbp()) {
5045 sdebug_unmap_max_blocks =
5046 clamp(sdebug_unmap_max_blocks, 0U, 0xffffffffU);
5047
5048 sdebug_unmap_max_desc =
5049 clamp(sdebug_unmap_max_desc, 0U, 256U);
5050
5051 sdebug_unmap_granularity =
5052 clamp(sdebug_unmap_granularity, 1U, 0xffffffffU);
5053
5054 if (sdebug_unmap_alignment &&
5055 sdebug_unmap_granularity <=
5056 sdebug_unmap_alignment) {
5057 pr_err("ERR: unmap_granularity <= unmap_alignment\n");
5058 ret = -EINVAL;
5059 goto free_vm;
5060 }
5061
5062 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
5063 map_storep = vmalloc(BITS_TO_LONGS(map_size) * sizeof(long));
5064
5065 pr_info("%lu provisioning blocks\n", map_size);
5066
5067 if (map_storep == NULL) {
5068 pr_err("out of mem. (MAP)\n");
5069 ret = -ENOMEM;
5070 goto free_vm;
5071 }
5072
5073 bitmap_zero(map_storep, map_size);
5074
5075 /* Map first 1KB for partition table */
5076 if (sdebug_num_parts)
5077 map_region(0, 2);
5078 }
5079
5080 pseudo_primary = root_device_register("pseudo_0");
5081 if (IS_ERR(pseudo_primary)) {
5082 pr_warn("root_device_register() error\n");
5083 ret = PTR_ERR(pseudo_primary);
5084 goto free_vm;
5085 }
5086 ret = bus_register(&pseudo_lld_bus);
5087 if (ret < 0) {
5088 pr_warn("bus_register error: %d\n", ret);
5089 goto dev_unreg;
5090 }
5091 ret = driver_register(&sdebug_driverfs_driver);
5092 if (ret < 0) {
5093 pr_warn("driver_register error: %d\n", ret);
5094 goto bus_unreg;
5095 }
5096
5097 host_to_add = sdebug_add_host;
5098 sdebug_add_host = 0;
5099
5100 for (k = 0; k < host_to_add; k++) {
5101 if (sdebug_add_adapter()) {
5102 pr_err("sdebug_add_adapter failed k=%d\n", k);
5103 break;
5104 }
5105 }
5106
5107 if (sdebug_verbose)
5108 pr_info("built %d host(s)\n", sdebug_add_host);
5109
5110 return 0;
5111
5112bus_unreg:
5113 bus_unregister(&pseudo_lld_bus);
5114dev_unreg:
5115 root_device_unregister(pseudo_primary);
5116free_vm:
5117 vfree(map_storep);
5118 vfree(dif_storep);
5119 vfree(fake_storep);
5120free_q_arr:
5121 kfree(sdebug_q_arr);
5122 return ret;
5123}
5124
5125static void __exit scsi_debug_exit(void)
5126{
5127 int k = sdebug_add_host;
5128
5129 stop_all_queued();
5130 free_all_queued();
5131 for (; k; k--)
5132 sdebug_remove_adapter();
5133 driver_unregister(&sdebug_driverfs_driver);
5134 bus_unregister(&pseudo_lld_bus);
5135 root_device_unregister(pseudo_primary);
5136
5137 vfree(map_storep);
5138 vfree(dif_storep);
5139 vfree(fake_storep);
5140 kfree(sdebug_q_arr);
5141}
5142
5143device_initcall(scsi_debug_init);
5144module_exit(scsi_debug_exit);
5145
5146static void sdebug_release_adapter(struct device * dev)
5147{
5148 struct sdebug_host_info *sdbg_host;
5149
5150 sdbg_host = to_sdebug_host(dev);
5151 kfree(sdbg_host);
5152}
5153
5154static int sdebug_add_adapter(void)
5155{
5156 int k, devs_per_host;
5157 int error = 0;
5158 struct sdebug_host_info *sdbg_host;
5159 struct sdebug_dev_info *sdbg_devinfo, *tmp;
5160
5161 sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL);
5162 if (NULL == sdbg_host) {
5163 pr_err("out of memory at line %d\n", __LINE__);
5164 return -ENOMEM;
5165 }
5166
5167 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
5168
5169 devs_per_host = sdebug_num_tgts * sdebug_max_luns;
5170 for (k = 0; k < devs_per_host; k++) {
5171 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
5172 if (!sdbg_devinfo) {
5173 pr_err("out of memory at line %d\n", __LINE__);
5174 error = -ENOMEM;
5175 goto clean;
5176 }
5177 }
5178
5179 spin_lock(&sdebug_host_list_lock);
5180 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
5181 spin_unlock(&sdebug_host_list_lock);
5182
5183 sdbg_host->dev.bus = &pseudo_lld_bus;
5184 sdbg_host->dev.parent = pseudo_primary;
5185 sdbg_host->dev.release = &sdebug_release_adapter;
5186 dev_set_name(&sdbg_host->dev, "adapter%d", sdebug_add_host);
5187
5188 error = device_register(&sdbg_host->dev);
5189
5190 if (error)
5191 goto clean;
5192
5193 ++sdebug_add_host;
5194 return error;
5195
5196clean:
5197 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
5198 dev_list) {
5199 list_del(&sdbg_devinfo->dev_list);
5200 kfree(sdbg_devinfo);
5201 }
5202
5203 kfree(sdbg_host);
5204 return error;
5205}
5206
5207static void sdebug_remove_adapter(void)
5208{
5209 struct sdebug_host_info * sdbg_host = NULL;
5210
5211 spin_lock(&sdebug_host_list_lock);
5212 if (!list_empty(&sdebug_host_list)) {
5213 sdbg_host = list_entry(sdebug_host_list.prev,
5214 struct sdebug_host_info, host_list);
5215 list_del(&sdbg_host->host_list);
5216 }
5217 spin_unlock(&sdebug_host_list_lock);
5218
5219 if (!sdbg_host)
5220 return;
5221
5222 device_unregister(&sdbg_host->dev);
5223 --sdebug_add_host;
5224}
5225
5226static int sdebug_change_qdepth(struct scsi_device *sdev, int qdepth)
5227{
5228 int num_in_q = 0;
5229 struct sdebug_dev_info *devip;
5230
5231 block_unblock_all_queues(true);
5232 devip = (struct sdebug_dev_info *)sdev->hostdata;
5233 if (NULL == devip) {
5234 block_unblock_all_queues(false);
5235 return -ENODEV;
5236 }
5237 num_in_q = atomic_read(&devip->num_in_q);
5238
5239 if (qdepth < 1)
5240 qdepth = 1;
5241 /* allow to exceed max host qc_arr elements for testing */
5242 if (qdepth > SDEBUG_CANQUEUE + 10)
5243 qdepth = SDEBUG_CANQUEUE + 10;
5244 scsi_change_queue_depth(sdev, qdepth);
5245
5246 if (SDEBUG_OPT_Q_NOISE & sdebug_opts) {
5247 sdev_printk(KERN_INFO, sdev, "%s: qdepth=%d, num_in_q=%d\n",
5248 __func__, qdepth, num_in_q);
5249 }
5250 block_unblock_all_queues(false);
5251 return sdev->queue_depth;
5252}
5253
5254static bool fake_timeout(struct scsi_cmnd *scp)
5255{
5256 if (0 == (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth))) {
5257 if (sdebug_every_nth < -1)
5258 sdebug_every_nth = -1;
5259 if (SDEBUG_OPT_TIMEOUT & sdebug_opts)
5260 return true; /* ignore command causing timeout */
5261 else if (SDEBUG_OPT_MAC_TIMEOUT & sdebug_opts &&
5262 scsi_medium_access_command(scp))
5263 return true; /* time out reads and writes */
5264 }
5265 return false;
5266}
5267
5268static int scsi_debug_queuecommand(struct Scsi_Host *shost,
5269 struct scsi_cmnd *scp)
5270{
5271 u8 sdeb_i;
5272 struct scsi_device *sdp = scp->device;
5273 const struct opcode_info_t *oip;
5274 const struct opcode_info_t *r_oip;
5275 struct sdebug_dev_info *devip;
5276 u8 *cmd = scp->cmnd;
5277 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
5278 int k, na;
5279 int errsts = 0;
5280 u32 flags;
5281 u16 sa;
5282 u8 opcode = cmd[0];
5283 bool has_wlun_rl;
5284
5285 scsi_set_resid(scp, 0);
5286 if (sdebug_statistics)
5287 atomic_inc(&sdebug_cmnd_count);
5288 if (unlikely(sdebug_verbose &&
5289 !(SDEBUG_OPT_NO_CDB_NOISE & sdebug_opts))) {
5290 char b[120];
5291 int n, len, sb;
5292
5293 len = scp->cmd_len;
5294 sb = (int)sizeof(b);
5295 if (len > 32)
5296 strcpy(b, "too long, over 32 bytes");
5297 else {
5298 for (k = 0, n = 0; k < len && n < sb; ++k)
5299 n += scnprintf(b + n, sb - n, "%02x ",
5300 (u32)cmd[k]);
5301 }
5302 if (sdebug_mq_active)
5303 sdev_printk(KERN_INFO, sdp, "%s: tag=%u, cmd %s\n",
5304 my_name, blk_mq_unique_tag(scp->request),
5305 b);
5306 else
5307 sdev_printk(KERN_INFO, sdp, "%s: cmd %s\n", my_name,
5308 b);
5309 }
5310 has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS);
5311 if (unlikely((sdp->lun >= sdebug_max_luns) && !has_wlun_rl))
5312 goto err_out;
5313
5314 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */
5315 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */
5316 devip = (struct sdebug_dev_info *)sdp->hostdata;
5317 if (unlikely(!devip)) {
5318 devip = find_build_dev_info(sdp);
5319 if (NULL == devip)
5320 goto err_out;
5321 }
5322 na = oip->num_attached;
5323 r_pfp = oip->pfp;
5324 if (na) { /* multiple commands with this opcode */
5325 r_oip = oip;
5326 if (FF_SA & r_oip->flags) {
5327 if (F_SA_LOW & oip->flags)
5328 sa = 0x1f & cmd[1];
5329 else
5330 sa = get_unaligned_be16(cmd + 8);
5331 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5332 if (opcode == oip->opcode && sa == oip->sa)
5333 break;
5334 }
5335 } else { /* since no service action only check opcode */
5336 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5337 if (opcode == oip->opcode)
5338 break;
5339 }
5340 }
5341 if (k > na) {
5342 if (F_SA_LOW & r_oip->flags)
5343 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4);
5344 else if (F_SA_HIGH & r_oip->flags)
5345 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7);
5346 else
5347 mk_sense_invalid_opcode(scp);
5348 goto check_cond;
5349 }
5350 } /* else (when na==0) we assume the oip is a match */
5351 flags = oip->flags;
5352 if (unlikely(F_INV_OP & flags)) {
5353 mk_sense_invalid_opcode(scp);
5354 goto check_cond;
5355 }
5356 if (unlikely(has_wlun_rl && !(F_RL_WLUN_OK & flags))) {
5357 if (sdebug_verbose)
5358 sdev_printk(KERN_INFO, sdp, "%s: Opcode 0x%x not%s\n",
5359 my_name, opcode, " supported for wlun");
5360 mk_sense_invalid_opcode(scp);
5361 goto check_cond;
5362 }
5363 if (unlikely(sdebug_strict)) { /* check cdb against mask */
5364 u8 rem;
5365 int j;
5366
5367 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) {
5368 rem = ~oip->len_mask[k] & cmd[k];
5369 if (rem) {
5370 for (j = 7; j >= 0; --j, rem <<= 1) {
5371 if (0x80 & rem)
5372 break;
5373 }
5374 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j);
5375 goto check_cond;
5376 }
5377 }
5378 }
5379 if (unlikely(!(F_SKIP_UA & flags) &&
5380 find_first_bit(devip->uas_bm,
5381 SDEBUG_NUM_UAS) != SDEBUG_NUM_UAS)) {
5382 errsts = make_ua(scp, devip);
5383 if (errsts)
5384 goto check_cond;
5385 }
5386 if (unlikely((F_M_ACCESS & flags) && atomic_read(&devip->stopped))) {
5387 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2);
5388 if (sdebug_verbose)
5389 sdev_printk(KERN_INFO, sdp, "%s reports: Not ready: "
5390 "%s\n", my_name, "initializing command "
5391 "required");
5392 errsts = check_condition_result;
5393 goto fini;
5394 }
5395 if (sdebug_fake_rw && (F_FAKE_RW & flags))
5396 goto fini;
5397 if (unlikely(sdebug_every_nth)) {
5398 if (fake_timeout(scp))
5399 return 0; /* ignore command: make trouble */
5400 }
5401 if (likely(oip->pfp))
5402 errsts = oip->pfp(scp, devip); /* calls a resp_* function */
5403 else if (r_pfp) /* if leaf function ptr NULL, try the root's */
5404 errsts = r_pfp(scp, devip);
5405
5406fini:
5407 return schedule_resp(scp, devip, errsts,
5408 ((F_DELAY_OVERR & flags) ? 0 : sdebug_jdelay));
5409check_cond:
5410 return schedule_resp(scp, devip, check_condition_result, 0);
5411err_out:
5412 return schedule_resp(scp, NULL, DID_NO_CONNECT << 16, 0);
5413}
5414
5415static struct scsi_host_template sdebug_driver_template = {
5416 .show_info = scsi_debug_show_info,
5417 .write_info = scsi_debug_write_info,
5418 .proc_name = sdebug_proc_name,
5419 .name = "SCSI DEBUG",
5420 .info = scsi_debug_info,
5421 .slave_alloc = scsi_debug_slave_alloc,
5422 .slave_configure = scsi_debug_slave_configure,
5423 .slave_destroy = scsi_debug_slave_destroy,
5424 .ioctl = scsi_debug_ioctl,
5425 .queuecommand = scsi_debug_queuecommand,
5426 .change_queue_depth = sdebug_change_qdepth,
5427 .eh_abort_handler = scsi_debug_abort,
5428 .eh_device_reset_handler = scsi_debug_device_reset,
5429 .eh_target_reset_handler = scsi_debug_target_reset,
5430 .eh_bus_reset_handler = scsi_debug_bus_reset,
5431 .eh_host_reset_handler = scsi_debug_host_reset,
5432 .can_queue = SDEBUG_CANQUEUE,
5433 .this_id = 7,
5434 .sg_tablesize = SG_MAX_SEGMENTS,
5435 .cmd_per_lun = DEF_CMD_PER_LUN,
5436 .max_sectors = -1U,
5437 .use_clustering = DISABLE_CLUSTERING,
5438 .module = THIS_MODULE,
5439 .track_queue_depth = 1,
5440};
5441
5442static int sdebug_driver_probe(struct device * dev)
5443{
5444 int error = 0;
5445 struct sdebug_host_info *sdbg_host;
5446 struct Scsi_Host *hpnt;
5447 int hprot;
5448
5449 sdbg_host = to_sdebug_host(dev);
5450
5451 sdebug_driver_template.can_queue = sdebug_max_queue;
5452 if (sdebug_clustering)
5453 sdebug_driver_template.use_clustering = ENABLE_CLUSTERING;
5454 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
5455 if (NULL == hpnt) {
5456 pr_err("scsi_host_alloc failed\n");
5457 error = -ENODEV;
5458 return error;
5459 }
5460 if (submit_queues > nr_cpu_ids) {
5461 pr_warn("%s: trim submit_queues (was %d) to nr_cpu_ids=%d\n",
5462 my_name, submit_queues, nr_cpu_ids);
5463 submit_queues = nr_cpu_ids;
5464 }
5465 /* Decide whether to tell scsi subsystem that we want mq */
5466 /* Following should give the same answer for each host */
5467 sdebug_mq_active = shost_use_blk_mq(hpnt) && (submit_queues > 1);
5468 if (sdebug_mq_active)
5469 hpnt->nr_hw_queues = submit_queues;
5470
5471 sdbg_host->shost = hpnt;
5472 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
5473 if ((hpnt->this_id >= 0) && (sdebug_num_tgts > hpnt->this_id))
5474 hpnt->max_id = sdebug_num_tgts + 1;
5475 else
5476 hpnt->max_id = sdebug_num_tgts;
5477 /* = sdebug_max_luns; */
5478 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
5479
5480 hprot = 0;
5481
5482 switch (sdebug_dif) {
5483
5484 case T10_PI_TYPE1_PROTECTION:
5485 hprot = SHOST_DIF_TYPE1_PROTECTION;
5486 if (sdebug_dix)
5487 hprot |= SHOST_DIX_TYPE1_PROTECTION;
5488 break;
5489
5490 case T10_PI_TYPE2_PROTECTION:
5491 hprot = SHOST_DIF_TYPE2_PROTECTION;
5492 if (sdebug_dix)
5493 hprot |= SHOST_DIX_TYPE2_PROTECTION;
5494 break;
5495
5496 case T10_PI_TYPE3_PROTECTION:
5497 hprot = SHOST_DIF_TYPE3_PROTECTION;
5498 if (sdebug_dix)
5499 hprot |= SHOST_DIX_TYPE3_PROTECTION;
5500 break;
5501
5502 default:
5503 if (sdebug_dix)
5504 hprot |= SHOST_DIX_TYPE0_PROTECTION;
5505 break;
5506 }
5507
5508 scsi_host_set_prot(hpnt, hprot);
5509
5510 if (have_dif_prot || sdebug_dix)
5511 pr_info("host protection%s%s%s%s%s%s%s\n",
5512 (hprot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
5513 (hprot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
5514 (hprot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
5515 (hprot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
5516 (hprot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
5517 (hprot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
5518 (hprot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
5519
5520 if (sdebug_guard == 1)
5521 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
5522 else
5523 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
5524
5525 sdebug_verbose = !!(SDEBUG_OPT_NOISE & sdebug_opts);
5526 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & sdebug_opts);
5527 if (sdebug_every_nth) /* need stats counters for every_nth */
5528 sdebug_statistics = true;
5529 error = scsi_add_host(hpnt, &sdbg_host->dev);
5530 if (error) {
5531 pr_err("scsi_add_host failed\n");
5532 error = -ENODEV;
5533 scsi_host_put(hpnt);
5534 } else
5535 scsi_scan_host(hpnt);
5536
5537 return error;
5538}
5539
5540static int sdebug_driver_remove(struct device * dev)
5541{
5542 struct sdebug_host_info *sdbg_host;
5543 struct sdebug_dev_info *sdbg_devinfo, *tmp;
5544
5545 sdbg_host = to_sdebug_host(dev);
5546
5547 if (!sdbg_host) {
5548 pr_err("Unable to locate host info\n");
5549 return -ENODEV;
5550 }
5551
5552 scsi_remove_host(sdbg_host->shost);
5553
5554 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
5555 dev_list) {
5556 list_del(&sdbg_devinfo->dev_list);
5557 kfree(sdbg_devinfo);
5558 }
5559
5560 scsi_host_put(sdbg_host->shost);
5561 return 0;
5562}
5563
5564static int pseudo_lld_bus_match(struct device *dev,
5565 struct device_driver *dev_driver)
5566{
5567 return 1;
5568}
5569
5570static struct bus_type pseudo_lld_bus = {
5571 .name = "pseudo",
5572 .match = pseudo_lld_bus_match,
5573 .probe = sdebug_driver_probe,
5574 .remove = sdebug_driver_remove,
5575 .drv_groups = sdebug_drv_groups,
5576};
1/*
2 * vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
3 * Copyright (C) 1992 Eric Youngdale
4 * Simulate a host adapter with 2 disks attached. Do a lot of checking
5 * to make sure that we are not getting blocks mixed up, and PANIC if
6 * anything out of the ordinary is seen.
7 * ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
8 *
9 * This version is more generic, simulating a variable number of disk
10 * (or disk like devices) sharing a common amount of RAM. To be more
11 * realistic, the simulated devices have the transport attributes of
12 * SAS disks.
13 *
14 *
15 * For documentation see http://sg.danny.cz/sg/sdebug26.html
16 *
17 * D. Gilbert (dpg) work for Magneto-Optical device test [20010421]
18 * dpg: work for devfs large number of disks [20010809]
19 * forked for lk 2.5 series [20011216, 20020101]
20 * use vmalloc() more inquiry+mode_sense [20020302]
21 * add timers for delayed responses [20020721]
22 * Patrick Mansfield <patmans@us.ibm.com> max_luns+scsi_level [20021031]
23 * Mike Anderson <andmike@us.ibm.com> sysfs work [20021118]
24 * dpg: change style of boot options to "scsi_debug.num_tgts=2" and
25 * module options to "modprobe scsi_debug num_tgts=2" [20021221]
26 */
27
28
29#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
30
31#include <linux/module.h>
32
33#include <linux/kernel.h>
34#include <linux/errno.h>
35#include <linux/timer.h>
36#include <linux/slab.h>
37#include <linux/types.h>
38#include <linux/string.h>
39#include <linux/genhd.h>
40#include <linux/fs.h>
41#include <linux/init.h>
42#include <linux/proc_fs.h>
43#include <linux/vmalloc.h>
44#include <linux/moduleparam.h>
45#include <linux/scatterlist.h>
46#include <linux/blkdev.h>
47#include <linux/crc-t10dif.h>
48#include <linux/spinlock.h>
49#include <linux/interrupt.h>
50#include <linux/atomic.h>
51#include <linux/hrtimer.h>
52
53#include <net/checksum.h>
54
55#include <asm/unaligned.h>
56
57#include <scsi/scsi.h>
58#include <scsi/scsi_cmnd.h>
59#include <scsi/scsi_device.h>
60#include <scsi/scsi_host.h>
61#include <scsi/scsicam.h>
62#include <scsi/scsi_eh.h>
63#include <scsi/scsi_tcq.h>
64#include <scsi/scsi_dbg.h>
65
66#include "sd.h"
67#include "scsi_logging.h"
68
69#define SCSI_DEBUG_VERSION "1.85"
70static const char *scsi_debug_version_date = "20141022";
71
72#define MY_NAME "scsi_debug"
73
74/* Additional Sense Code (ASC) */
75#define NO_ADDITIONAL_SENSE 0x0
76#define LOGICAL_UNIT_NOT_READY 0x4
77#define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
78#define UNRECOVERED_READ_ERR 0x11
79#define PARAMETER_LIST_LENGTH_ERR 0x1a
80#define INVALID_OPCODE 0x20
81#define LBA_OUT_OF_RANGE 0x21
82#define INVALID_FIELD_IN_CDB 0x24
83#define INVALID_FIELD_IN_PARAM_LIST 0x26
84#define UA_RESET_ASC 0x29
85#define UA_CHANGED_ASC 0x2a
86#define TARGET_CHANGED_ASC 0x3f
87#define LUNS_CHANGED_ASCQ 0x0e
88#define INSUFF_RES_ASC 0x55
89#define INSUFF_RES_ASCQ 0x3
90#define POWER_ON_RESET_ASCQ 0x0
91#define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */
92#define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */
93#define CAPACITY_CHANGED_ASCQ 0x9
94#define SAVING_PARAMS_UNSUP 0x39
95#define TRANSPORT_PROBLEM 0x4b
96#define THRESHOLD_EXCEEDED 0x5d
97#define LOW_POWER_COND_ON 0x5e
98#define MISCOMPARE_VERIFY_ASC 0x1d
99#define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */
100#define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16
101
102/* Additional Sense Code Qualifier (ASCQ) */
103#define ACK_NAK_TO 0x3
104
105
106/* Default values for driver parameters */
107#define DEF_NUM_HOST 1
108#define DEF_NUM_TGTS 1
109#define DEF_MAX_LUNS 1
110/* With these defaults, this driver will make 1 host with 1 target
111 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
112 */
113#define DEF_ATO 1
114#define DEF_DELAY 1 /* if > 0 unit is a jiffy */
115#define DEF_DEV_SIZE_MB 8
116#define DEF_DIF 0
117#define DEF_DIX 0
118#define DEF_D_SENSE 0
119#define DEF_EVERY_NTH 0
120#define DEF_FAKE_RW 0
121#define DEF_GUARD 0
122#define DEF_HOST_LOCK 0
123#define DEF_LBPU 0
124#define DEF_LBPWS 0
125#define DEF_LBPWS10 0
126#define DEF_LBPRZ 1
127#define DEF_LOWEST_ALIGNED 0
128#define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */
129#define DEF_NO_LUN_0 0
130#define DEF_NUM_PARTS 0
131#define DEF_OPTS 0
132#define DEF_OPT_BLKS 1024
133#define DEF_PHYSBLK_EXP 0
134#define DEF_PTYPE 0
135#define DEF_REMOVABLE false
136#define DEF_SCSI_LEVEL 6 /* INQUIRY, byte2 [6->SPC-4] */
137#define DEF_SECTOR_SIZE 512
138#define DEF_UNMAP_ALIGNMENT 0
139#define DEF_UNMAP_GRANULARITY 1
140#define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
141#define DEF_UNMAP_MAX_DESC 256
142#define DEF_VIRTUAL_GB 0
143#define DEF_VPD_USE_HOSTNO 1
144#define DEF_WRITESAME_LENGTH 0xFFFF
145#define DEF_STRICT 0
146#define DELAY_OVERRIDDEN -9999
147
148/* bit mask values for scsi_debug_opts */
149#define SCSI_DEBUG_OPT_NOISE 1
150#define SCSI_DEBUG_OPT_MEDIUM_ERR 2
151#define SCSI_DEBUG_OPT_TIMEOUT 4
152#define SCSI_DEBUG_OPT_RECOVERED_ERR 8
153#define SCSI_DEBUG_OPT_TRANSPORT_ERR 16
154#define SCSI_DEBUG_OPT_DIF_ERR 32
155#define SCSI_DEBUG_OPT_DIX_ERR 64
156#define SCSI_DEBUG_OPT_MAC_TIMEOUT 128
157#define SCSI_DEBUG_OPT_SHORT_TRANSFER 0x100
158#define SCSI_DEBUG_OPT_Q_NOISE 0x200
159#define SCSI_DEBUG_OPT_ALL_TSF 0x400
160#define SCSI_DEBUG_OPT_RARE_TSF 0x800
161#define SCSI_DEBUG_OPT_N_WCE 0x1000
162#define SCSI_DEBUG_OPT_RESET_NOISE 0x2000
163#define SCSI_DEBUG_OPT_NO_CDB_NOISE 0x4000
164#define SCSI_DEBUG_OPT_ALL_NOISE (0x1 | 0x200 | 0x2000)
165/* When "every_nth" > 0 then modulo "every_nth" commands:
166 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
167 * - a RECOVERED_ERROR is simulated on successful read and write
168 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
169 * - a TRANSPORT_ERROR is simulated on successful read and write
170 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
171 *
172 * When "every_nth" < 0 then after "- every_nth" commands:
173 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
174 * - a RECOVERED_ERROR is simulated on successful read and write
175 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
176 * - a TRANSPORT_ERROR is simulated on successful read and write
177 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
178 * This will continue until some other action occurs (e.g. the user
179 * writing a new value (other than -1 or 1) to every_nth via sysfs).
180 */
181
182/* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs)are returned in
183 * priority order. In the subset implemented here lower numbers have higher
184 * priority. The UA numbers should be a sequence starting from 0 with
185 * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */
186#define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */
187#define SDEBUG_UA_BUS_RESET 1
188#define SDEBUG_UA_MODE_CHANGED 2
189#define SDEBUG_UA_CAPACITY_CHANGED 3
190#define SDEBUG_UA_LUNS_CHANGED 4
191#define SDEBUG_UA_MICROCODE_CHANGED 5 /* simulate firmware change */
192#define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 6
193#define SDEBUG_NUM_UAS 7
194
195/* for check_readiness() */
196#define UAS_ONLY 1 /* check for UAs only */
197#define UAS_TUR 0 /* if no UAs then check if media access possible */
198
199/* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
200 * sector on read commands: */
201#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
202#define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
203
204/* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
205 * or "peripheral device" addressing (value 0) */
206#define SAM2_LUN_ADDRESS_METHOD 0
207
208/* SCSI_DEBUG_CANQUEUE is the maximum number of commands that can be queued
209 * (for response) at one time. Can be reduced by max_queue option. Command
210 * responses are not queued when delay=0 and ndelay=0. The per-device
211 * DEF_CMD_PER_LUN can be changed via sysfs:
212 * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth but cannot exceed
213 * SCSI_DEBUG_CANQUEUE. */
214#define SCSI_DEBUG_CANQUEUE_WORDS 9 /* a WORD is bits in a long */
215#define SCSI_DEBUG_CANQUEUE (SCSI_DEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
216#define DEF_CMD_PER_LUN 255
217
218#if DEF_CMD_PER_LUN > SCSI_DEBUG_CANQUEUE
219#warning "Expect DEF_CMD_PER_LUN <= SCSI_DEBUG_CANQUEUE"
220#endif
221
222/* SCSI opcodes (first byte of cdb) mapped onto these indexes */
223enum sdeb_opcode_index {
224 SDEB_I_INVALID_OPCODE = 0,
225 SDEB_I_INQUIRY = 1,
226 SDEB_I_REPORT_LUNS = 2,
227 SDEB_I_REQUEST_SENSE = 3,
228 SDEB_I_TEST_UNIT_READY = 4,
229 SDEB_I_MODE_SENSE = 5, /* 6, 10 */
230 SDEB_I_MODE_SELECT = 6, /* 6, 10 */
231 SDEB_I_LOG_SENSE = 7,
232 SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */
233 SDEB_I_READ = 9, /* 6, 10, 12, 16 */
234 SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */
235 SDEB_I_START_STOP = 11,
236 SDEB_I_SERV_ACT_IN = 12, /* 12, 16 */
237 SDEB_I_SERV_ACT_OUT = 13, /* 12, 16 */
238 SDEB_I_MAINT_IN = 14,
239 SDEB_I_MAINT_OUT = 15,
240 SDEB_I_VERIFY = 16, /* 10 only */
241 SDEB_I_VARIABLE_LEN = 17,
242 SDEB_I_RESERVE = 18, /* 6, 10 */
243 SDEB_I_RELEASE = 19, /* 6, 10 */
244 SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
245 SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */
246 SDEB_I_ATA_PT = 22, /* 12, 16 */
247 SDEB_I_SEND_DIAG = 23,
248 SDEB_I_UNMAP = 24,
249 SDEB_I_XDWRITEREAD = 25, /* 10 only */
250 SDEB_I_WRITE_BUFFER = 26,
251 SDEB_I_WRITE_SAME = 27, /* 10, 16 */
252 SDEB_I_SYNC_CACHE = 28, /* 10 only */
253 SDEB_I_COMP_WRITE = 29,
254 SDEB_I_LAST_ELEMENT = 30, /* keep this last */
255};
256
257static const unsigned char opcode_ind_arr[256] = {
258/* 0x0; 0x0->0x1f: 6 byte cdbs */
259 SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE,
260 0, 0, 0, 0,
261 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0,
262 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
263 SDEB_I_RELEASE,
264 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG,
265 SDEB_I_ALLOW_REMOVAL, 0,
266/* 0x20; 0x20->0x3f: 10 byte cdbs */
267 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0,
268 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY,
269 0, 0, 0, 0, 0, SDEB_I_SYNC_CACHE, 0, 0,
270 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0,
271/* 0x40; 0x40->0x5f: 10 byte cdbs */
272 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0,
273 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0,
274 0, 0, 0, SDEB_I_XDWRITEREAD, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
275 SDEB_I_RELEASE,
276 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0,
277/* 0x60; 0x60->0x7d are reserved */
278 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
279 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
280 0, SDEB_I_VARIABLE_LEN,
281/* 0x80; 0x80->0x9f: 16 byte cdbs */
282 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0,
283 SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0, 0, 0, 0, 0,
284 0, 0, 0, SDEB_I_WRITE_SAME, 0, 0, 0, 0,
285 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN, SDEB_I_SERV_ACT_OUT,
286/* 0xa0; 0xa0->0xbf: 12 byte cdbs */
287 SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN,
288 SDEB_I_MAINT_OUT, 0, 0, 0,
289 SDEB_I_READ, SDEB_I_SERV_ACT_OUT, SDEB_I_WRITE, SDEB_I_SERV_ACT_IN,
290 0, 0, 0, 0,
291 0, 0, 0, 0, 0, 0, 0, 0,
292 0, 0, 0, 0, 0, 0, 0, 0,
293/* 0xc0; 0xc0->0xff: vendor specific */
294 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
295 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
296 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
297 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
298};
299
300#define F_D_IN 1
301#define F_D_OUT 2
302#define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */
303#define F_D_UNKN 8
304#define F_RL_WLUN_OK 0x10
305#define F_SKIP_UA 0x20
306#define F_DELAY_OVERR 0x40
307#define F_SA_LOW 0x80 /* cdb byte 1, bits 4 to 0 */
308#define F_SA_HIGH 0x100 /* as used by variable length cdbs */
309#define F_INV_OP 0x200
310#define F_FAKE_RW 0x400
311#define F_M_ACCESS 0x800 /* media access */
312
313#define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR)
314#define FF_DIRECT_IO (F_M_ACCESS | F_FAKE_RW)
315#define FF_SA (F_SA_HIGH | F_SA_LOW)
316
317struct sdebug_dev_info;
318static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *);
319static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *);
320static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *);
321static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
322static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *);
323static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
324static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
325static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
326static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
327static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
328static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
329static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
330static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *);
331static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *);
332static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *);
333static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *);
334static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *);
335static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *);
336static int resp_xdwriteread_10(struct scsi_cmnd *, struct sdebug_dev_info *);
337static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
338static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *);
339
340struct opcode_info_t {
341 u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff
342 * for terminating element */
343 u8 opcode; /* if num_attached > 0, preferred */
344 u16 sa; /* service action */
345 u32 flags; /* OR-ed set of SDEB_F_* */
346 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
347 const struct opcode_info_t *arrp; /* num_attached elements or NULL */
348 u8 len_mask[16]; /* len=len_mask[0], then mask for cdb[1]... */
349 /* ignore cdb bytes after position 15 */
350};
351
352static const struct opcode_info_t msense_iarr[1] = {
353 {0, 0x1a, 0, F_D_IN, NULL, NULL,
354 {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
355};
356
357static const struct opcode_info_t mselect_iarr[1] = {
358 {0, 0x15, 0, F_D_OUT, NULL, NULL,
359 {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
360};
361
362static const struct opcode_info_t read_iarr[3] = {
363 {0, 0x28, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL,/* READ(10) */
364 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
365 0, 0, 0, 0} },
366 {0, 0x8, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL, /* READ(6) */
367 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
368 {0, 0xa8, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL,/* READ(12) */
369 {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x9f,
370 0xc7, 0, 0, 0, 0} },
371};
372
373static const struct opcode_info_t write_iarr[3] = {
374 {0, 0x2a, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 10 */
375 {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
376 0, 0, 0, 0} },
377 {0, 0xa, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 6 */
378 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
379 {0, 0xaa, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 12 */
380 {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x9f,
381 0xc7, 0, 0, 0, 0} },
382};
383
384static const struct opcode_info_t sa_in_iarr[1] = {
385 {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL,
386 {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
387 0xff, 0xff, 0xff, 0, 0xc7} },
388};
389
390static const struct opcode_info_t vl_iarr[1] = { /* VARIABLE LENGTH */
391 {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_DIRECT_IO, resp_write_dt0,
392 NULL, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0xb, 0xfa,
393 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
394};
395
396static const struct opcode_info_t maint_in_iarr[2] = {
397 {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL,
398 {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
399 0xc7, 0, 0, 0, 0} },
400 {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL,
401 {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
402 0, 0} },
403};
404
405static const struct opcode_info_t write_same_iarr[1] = {
406 {0, 0x93, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, resp_write_same_16, NULL,
407 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
408 0xff, 0xff, 0xff, 0x1f, 0xc7} },
409};
410
411static const struct opcode_info_t reserve_iarr[1] = {
412 {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */
413 {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
414};
415
416static const struct opcode_info_t release_iarr[1] = {
417 {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */
418 {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
419};
420
421
422/* This array is accessed via SDEB_I_* values. Make sure all are mapped,
423 * plus the terminating elements for logic that scans this table such as
424 * REPORT SUPPORTED OPERATION CODES. */
425static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEMENT + 1] = {
426/* 0 */
427 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL,
428 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
429 {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL,
430 {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
431 {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL,
432 {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
433 0, 0} },
434 {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL,
435 {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
436 {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */
437 {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
438 {1, 0x5a, 0, F_D_IN, resp_mode_sense, msense_iarr,
439 {10, 0xf8, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
440 0} },
441 {1, 0x55, 0, F_D_OUT, resp_mode_select, mselect_iarr,
442 {10, 0xf1, 0, 0, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
443 {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL,
444 {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0,
445 0, 0, 0} },
446 {0, 0x25, 0, F_D_IN, resp_readcap, NULL,
447 {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0,
448 0, 0} },
449 {3, 0x88, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, read_iarr,
450 {16, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
451 0xff, 0xff, 0xff, 0x9f, 0xc7} }, /* READ(16) */
452/* 10 */
453 {3, 0x8a, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, write_iarr,
454 {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
455 0xff, 0xff, 0xff, 0x9f, 0xc7} }, /* WRITE(16) */
456 {0, 0x1b, 0, 0, resp_start_stop, NULL, /* START STOP UNIT */
457 {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
458 {1, 0x9e, 0x10, F_SA_LOW | F_D_IN, resp_readcap16, sa_in_iarr,
459 {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
460 0xff, 0xff, 0xff, 0x1, 0xc7} }, /* READ CAPACITY(16) */
461 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* SA OUT */
462 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
463 {2, 0xa3, 0xa, F_SA_LOW | F_D_IN, resp_report_tgtpgs, maint_in_iarr,
464 {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, 0,
465 0} },
466 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */
467 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
468 {0, 0x2f, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, NULL, NULL, /* VERIFY(10) */
469 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7,
470 0, 0, 0, 0, 0, 0} },
471 {1, 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_DIRECT_IO, resp_read_dt0,
472 vl_iarr, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0x9, 0xfe, 0,
473 0xff, 0xff, 0xff, 0xff} },/* VARIABLE LENGTH, READ(32) */
474 {1, 0x56, 0, F_D_OUT, NULL, reserve_iarr, /* RESERVE(10) */
475 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
476 0} },
477 {1, 0x57, 0, F_D_OUT, NULL, release_iarr, /* RELEASE(10) */
478 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
479 0} },
480/* 20 */
481 {0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */
482 {6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
483 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */
484 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
485 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */
486 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
487 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */
488 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
489 {0, 0x42, 0, F_D_OUT | FF_DIRECT_IO, resp_unmap, NULL, /* UNMAP */
490 {10, 0x1, 0, 0, 0, 0, 0x1f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
491 {0, 0x53, 0, F_D_IN | F_D_OUT | FF_DIRECT_IO, resp_xdwriteread_10,
492 NULL, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7,
493 0, 0, 0, 0, 0, 0} },
494 {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL,
495 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0,
496 0, 0, 0, 0} }, /* WRITE_BUFFER */
497 {1, 0x41, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, resp_write_same_10,
498 write_same_iarr, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff,
499 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
500 {0, 0x35, 0, F_DELAY_OVERR | FF_DIRECT_IO, NULL, NULL, /* SYNC_CACHE */
501 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
502 0, 0, 0, 0} },
503 {0, 0x89, 0, F_D_OUT | FF_DIRECT_IO, resp_comp_write, NULL,
504 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
505 0, 0xff, 0x1f, 0xc7} }, /* COMPARE AND WRITE */
506
507/* 30 */
508 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */
509 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
510};
511
512struct sdebug_scmd_extra_t {
513 bool inj_recovered;
514 bool inj_transport;
515 bool inj_dif;
516 bool inj_dix;
517 bool inj_short;
518};
519
520static int scsi_debug_add_host = DEF_NUM_HOST;
521static int scsi_debug_ato = DEF_ATO;
522static int scsi_debug_delay = DEF_DELAY;
523static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB;
524static int scsi_debug_dif = DEF_DIF;
525static int scsi_debug_dix = DEF_DIX;
526static int scsi_debug_dsense = DEF_D_SENSE;
527static int scsi_debug_every_nth = DEF_EVERY_NTH;
528static int scsi_debug_fake_rw = DEF_FAKE_RW;
529static unsigned int scsi_debug_guard = DEF_GUARD;
530static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED;
531static int scsi_debug_max_luns = DEF_MAX_LUNS;
532static int scsi_debug_max_queue = SCSI_DEBUG_CANQUEUE;
533static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */
534static int scsi_debug_ndelay = DEF_NDELAY;
535static int scsi_debug_no_lun_0 = DEF_NO_LUN_0;
536static int scsi_debug_no_uld = 0;
537static int scsi_debug_num_parts = DEF_NUM_PARTS;
538static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */
539static int scsi_debug_opt_blks = DEF_OPT_BLKS;
540static int scsi_debug_opts = DEF_OPTS;
541static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP;
542static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */
543static int scsi_debug_scsi_level = DEF_SCSI_LEVEL;
544static int scsi_debug_sector_size = DEF_SECTOR_SIZE;
545static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB;
546static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
547static unsigned int scsi_debug_lbpu = DEF_LBPU;
548static unsigned int scsi_debug_lbpws = DEF_LBPWS;
549static unsigned int scsi_debug_lbpws10 = DEF_LBPWS10;
550static unsigned int scsi_debug_lbprz = DEF_LBPRZ;
551static unsigned int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
552static unsigned int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY;
553static unsigned int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
554static unsigned int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
555static unsigned int scsi_debug_write_same_length = DEF_WRITESAME_LENGTH;
556static bool scsi_debug_removable = DEF_REMOVABLE;
557static bool scsi_debug_clustering;
558static bool scsi_debug_host_lock = DEF_HOST_LOCK;
559static bool scsi_debug_strict = DEF_STRICT;
560static bool sdebug_any_injecting_opt;
561
562static atomic_t sdebug_cmnd_count;
563static atomic_t sdebug_completions;
564static atomic_t sdebug_a_tsf; /* counter of 'almost' TSFs */
565
566#define DEV_READONLY(TGT) (0)
567
568static unsigned int sdebug_store_sectors;
569static sector_t sdebug_capacity; /* in sectors */
570
571/* old BIOS stuff, kernel may get rid of them but some mode sense pages
572 may still need them */
573static int sdebug_heads; /* heads per disk */
574static int sdebug_cylinders_per; /* cylinders per surface */
575static int sdebug_sectors_per; /* sectors per cylinder */
576
577#define SDEBUG_MAX_PARTS 4
578
579#define SCSI_DEBUG_MAX_CMD_LEN 32
580
581static unsigned int scsi_debug_lbp(void)
582{
583 return ((0 == scsi_debug_fake_rw) &&
584 (scsi_debug_lbpu | scsi_debug_lbpws | scsi_debug_lbpws10));
585}
586
587struct sdebug_dev_info {
588 struct list_head dev_list;
589 unsigned int channel;
590 unsigned int target;
591 u64 lun;
592 struct sdebug_host_info *sdbg_host;
593 unsigned long uas_bm[1];
594 atomic_t num_in_q;
595 char stopped; /* TODO: should be atomic */
596 bool used;
597};
598
599struct sdebug_host_info {
600 struct list_head host_list;
601 struct Scsi_Host *shost;
602 struct device dev;
603 struct list_head dev_info_list;
604};
605
606#define to_sdebug_host(d) \
607 container_of(d, struct sdebug_host_info, dev)
608
609static LIST_HEAD(sdebug_host_list);
610static DEFINE_SPINLOCK(sdebug_host_list_lock);
611
612
613struct sdebug_hrtimer { /* ... is derived from hrtimer */
614 struct hrtimer hrt; /* must be first element */
615 int qa_indx;
616};
617
618struct sdebug_queued_cmd {
619 /* in_use flagged by a bit in queued_in_use_bm[] */
620 struct timer_list *cmnd_timerp;
621 struct tasklet_struct *tletp;
622 struct sdebug_hrtimer *sd_hrtp;
623 struct scsi_cmnd * a_cmnd;
624};
625static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
626static unsigned long queued_in_use_bm[SCSI_DEBUG_CANQUEUE_WORDS];
627
628
629static unsigned char * fake_storep; /* ramdisk storage */
630static struct sd_dif_tuple *dif_storep; /* protection info */
631static void *map_storep; /* provisioning map */
632
633static unsigned long map_size;
634static int num_aborts;
635static int num_dev_resets;
636static int num_target_resets;
637static int num_bus_resets;
638static int num_host_resets;
639static int dix_writes;
640static int dix_reads;
641static int dif_errors;
642
643static DEFINE_SPINLOCK(queued_arr_lock);
644static DEFINE_RWLOCK(atomic_rw);
645
646static char sdebug_proc_name[] = MY_NAME;
647static const char *my_name = MY_NAME;
648
649static struct bus_type pseudo_lld_bus;
650
651static struct device_driver sdebug_driverfs_driver = {
652 .name = sdebug_proc_name,
653 .bus = &pseudo_lld_bus,
654};
655
656static const int check_condition_result =
657 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
658
659static const int illegal_condition_result =
660 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
661
662static const int device_qfull_result =
663 (DID_OK << 16) | (COMMAND_COMPLETE << 8) | SAM_STAT_TASK_SET_FULL;
664
665static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
666 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
667 0, 0, 0, 0};
668static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
669 0, 0, 0x2, 0x4b};
670static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
671 0, 0, 0x0, 0x0};
672
673static void *fake_store(unsigned long long lba)
674{
675 lba = do_div(lba, sdebug_store_sectors);
676
677 return fake_storep + lba * scsi_debug_sector_size;
678}
679
680static struct sd_dif_tuple *dif_store(sector_t sector)
681{
682 sector = sector_div(sector, sdebug_store_sectors);
683
684 return dif_storep + sector;
685}
686
687static int sdebug_add_adapter(void);
688static void sdebug_remove_adapter(void);
689
690static void sdebug_max_tgts_luns(void)
691{
692 struct sdebug_host_info *sdbg_host;
693 struct Scsi_Host *hpnt;
694
695 spin_lock(&sdebug_host_list_lock);
696 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
697 hpnt = sdbg_host->shost;
698 if ((hpnt->this_id >= 0) &&
699 (scsi_debug_num_tgts > hpnt->this_id))
700 hpnt->max_id = scsi_debug_num_tgts + 1;
701 else
702 hpnt->max_id = scsi_debug_num_tgts;
703 /* scsi_debug_max_luns; */
704 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
705 }
706 spin_unlock(&sdebug_host_list_lock);
707}
708
709enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
710
711/* Set in_bit to -1 to indicate no bit position of invalid field */
712static void
713mk_sense_invalid_fld(struct scsi_cmnd *scp, enum sdeb_cmd_data c_d,
714 int in_byte, int in_bit)
715{
716 unsigned char *sbuff;
717 u8 sks[4];
718 int sl, asc;
719
720 sbuff = scp->sense_buffer;
721 if (!sbuff) {
722 sdev_printk(KERN_ERR, scp->device,
723 "%s: sense_buffer is NULL\n", __func__);
724 return;
725 }
726 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
727 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
728 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, ILLEGAL_REQUEST,
729 asc, 0);
730 memset(sks, 0, sizeof(sks));
731 sks[0] = 0x80;
732 if (c_d)
733 sks[0] |= 0x40;
734 if (in_bit >= 0) {
735 sks[0] |= 0x8;
736 sks[0] |= 0x7 & in_bit;
737 }
738 put_unaligned_be16(in_byte, sks + 1);
739 if (scsi_debug_dsense) {
740 sl = sbuff[7] + 8;
741 sbuff[7] = sl;
742 sbuff[sl] = 0x2;
743 sbuff[sl + 1] = 0x6;
744 memcpy(sbuff + sl + 4, sks, 3);
745 } else
746 memcpy(sbuff + 15, sks, 3);
747 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
748 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
749 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
750 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
751}
752
753static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
754{
755 unsigned char *sbuff;
756
757 sbuff = scp->sense_buffer;
758 if (!sbuff) {
759 sdev_printk(KERN_ERR, scp->device,
760 "%s: sense_buffer is NULL\n", __func__);
761 return;
762 }
763 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
764
765 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, key, asc, asq);
766
767 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
768 sdev_printk(KERN_INFO, scp->device,
769 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
770 my_name, key, asc, asq);
771}
772
773static void
774mk_sense_invalid_opcode(struct scsi_cmnd *scp)
775{
776 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
777}
778
779static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
780{
781 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
782 if (0x1261 == cmd)
783 sdev_printk(KERN_INFO, dev,
784 "%s: BLKFLSBUF [0x1261]\n", __func__);
785 else if (0x5331 == cmd)
786 sdev_printk(KERN_INFO, dev,
787 "%s: CDROM_GET_CAPABILITY [0x5331]\n",
788 __func__);
789 else
790 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
791 __func__, cmd);
792 }
793 return -EINVAL;
794 /* return -ENOTTY; // correct return but upsets fdisk */
795}
796
797static void clear_luns_changed_on_target(struct sdebug_dev_info *devip)
798{
799 struct sdebug_host_info *sdhp;
800 struct sdebug_dev_info *dp;
801
802 spin_lock(&sdebug_host_list_lock);
803 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
804 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
805 if ((devip->sdbg_host == dp->sdbg_host) &&
806 (devip->target == dp->target))
807 clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
808 }
809 }
810 spin_unlock(&sdebug_host_list_lock);
811}
812
813static int check_readiness(struct scsi_cmnd *SCpnt, int uas_only,
814 struct sdebug_dev_info * devip)
815{
816 int k;
817 bool debug = !!(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts);
818
819 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
820 if (k != SDEBUG_NUM_UAS) {
821 const char *cp = NULL;
822
823 switch (k) {
824 case SDEBUG_UA_POR:
825 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
826 UA_RESET_ASC, POWER_ON_RESET_ASCQ);
827 if (debug)
828 cp = "power on reset";
829 break;
830 case SDEBUG_UA_BUS_RESET:
831 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
832 UA_RESET_ASC, BUS_RESET_ASCQ);
833 if (debug)
834 cp = "bus reset";
835 break;
836 case SDEBUG_UA_MODE_CHANGED:
837 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
838 UA_CHANGED_ASC, MODE_CHANGED_ASCQ);
839 if (debug)
840 cp = "mode parameters changed";
841 break;
842 case SDEBUG_UA_CAPACITY_CHANGED:
843 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
844 UA_CHANGED_ASC, CAPACITY_CHANGED_ASCQ);
845 if (debug)
846 cp = "capacity data changed";
847 break;
848 case SDEBUG_UA_MICROCODE_CHANGED:
849 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
850 TARGET_CHANGED_ASC, MICROCODE_CHANGED_ASCQ);
851 if (debug)
852 cp = "microcode has been changed";
853 break;
854 case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET:
855 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
856 TARGET_CHANGED_ASC,
857 MICROCODE_CHANGED_WO_RESET_ASCQ);
858 if (debug)
859 cp = "microcode has been changed without reset";
860 break;
861 case SDEBUG_UA_LUNS_CHANGED:
862 /*
863 * SPC-3 behavior is to report a UNIT ATTENTION with
864 * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN
865 * on the target, until a REPORT LUNS command is
866 * received. SPC-4 behavior is to report it only once.
867 * NOTE: scsi_debug_scsi_level does not use the same
868 * values as struct scsi_device->scsi_level.
869 */
870 if (scsi_debug_scsi_level >= 6) /* SPC-4 and above */
871 clear_luns_changed_on_target(devip);
872 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
873 TARGET_CHANGED_ASC,
874 LUNS_CHANGED_ASCQ);
875 if (debug)
876 cp = "reported luns data has changed";
877 break;
878 default:
879 pr_warn("%s: unexpected unit attention code=%d\n",
880 __func__, k);
881 if (debug)
882 cp = "unknown";
883 break;
884 }
885 clear_bit(k, devip->uas_bm);
886 if (debug)
887 sdev_printk(KERN_INFO, SCpnt->device,
888 "%s reports: Unit attention: %s\n",
889 my_name, cp);
890 return check_condition_result;
891 }
892 if ((UAS_TUR == uas_only) && devip->stopped) {
893 mk_sense_buffer(SCpnt, NOT_READY, LOGICAL_UNIT_NOT_READY,
894 0x2);
895 if (debug)
896 sdev_printk(KERN_INFO, SCpnt->device,
897 "%s reports: Not ready: %s\n", my_name,
898 "initializing command required");
899 return check_condition_result;
900 }
901 return 0;
902}
903
904/* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */
905static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
906 int arr_len)
907{
908 int act_len;
909 struct scsi_data_buffer *sdb = scsi_in(scp);
910
911 if (!sdb->length)
912 return 0;
913 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
914 return (DID_ERROR << 16);
915
916 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
917 arr, arr_len);
918 sdb->resid = scsi_bufflen(scp) - act_len;
919
920 return 0;
921}
922
923/* Returns number of bytes fetched into 'arr' or -1 if error. */
924static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
925 int arr_len)
926{
927 if (!scsi_bufflen(scp))
928 return 0;
929 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE))
930 return -1;
931
932 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
933}
934
935
936static const char * inq_vendor_id = "Linux ";
937static const char * inq_product_id = "scsi_debug ";
938static const char *inq_product_rev = "0184"; /* version less '.' */
939
940/* Device identification VPD page. Returns number of bytes placed in arr */
941static int inquiry_evpd_83(unsigned char * arr, int port_group_id,
942 int target_dev_id, int dev_id_num,
943 const char * dev_id_str,
944 int dev_id_str_len)
945{
946 int num, port_a;
947 char b[32];
948
949 port_a = target_dev_id + 1;
950 /* T10 vendor identifier field format (faked) */
951 arr[0] = 0x2; /* ASCII */
952 arr[1] = 0x1;
953 arr[2] = 0x0;
954 memcpy(&arr[4], inq_vendor_id, 8);
955 memcpy(&arr[12], inq_product_id, 16);
956 memcpy(&arr[28], dev_id_str, dev_id_str_len);
957 num = 8 + 16 + dev_id_str_len;
958 arr[3] = num;
959 num += 4;
960 if (dev_id_num >= 0) {
961 /* NAA-5, Logical unit identifier (binary) */
962 arr[num++] = 0x1; /* binary (not necessarily sas) */
963 arr[num++] = 0x3; /* PIV=0, lu, naa */
964 arr[num++] = 0x0;
965 arr[num++] = 0x8;
966 arr[num++] = 0x53; /* naa-5 ieee company id=0x333333 (fake) */
967 arr[num++] = 0x33;
968 arr[num++] = 0x33;
969 arr[num++] = 0x30;
970 arr[num++] = (dev_id_num >> 24);
971 arr[num++] = (dev_id_num >> 16) & 0xff;
972 arr[num++] = (dev_id_num >> 8) & 0xff;
973 arr[num++] = dev_id_num & 0xff;
974 /* Target relative port number */
975 arr[num++] = 0x61; /* proto=sas, binary */
976 arr[num++] = 0x94; /* PIV=1, target port, rel port */
977 arr[num++] = 0x0; /* reserved */
978 arr[num++] = 0x4; /* length */
979 arr[num++] = 0x0; /* reserved */
980 arr[num++] = 0x0; /* reserved */
981 arr[num++] = 0x0;
982 arr[num++] = 0x1; /* relative port A */
983 }
984 /* NAA-5, Target port identifier */
985 arr[num++] = 0x61; /* proto=sas, binary */
986 arr[num++] = 0x93; /* piv=1, target port, naa */
987 arr[num++] = 0x0;
988 arr[num++] = 0x8;
989 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
990 arr[num++] = 0x22;
991 arr[num++] = 0x22;
992 arr[num++] = 0x20;
993 arr[num++] = (port_a >> 24);
994 arr[num++] = (port_a >> 16) & 0xff;
995 arr[num++] = (port_a >> 8) & 0xff;
996 arr[num++] = port_a & 0xff;
997 /* NAA-5, Target port group identifier */
998 arr[num++] = 0x61; /* proto=sas, binary */
999 arr[num++] = 0x95; /* piv=1, target port group id */
1000 arr[num++] = 0x0;
1001 arr[num++] = 0x4;
1002 arr[num++] = 0;
1003 arr[num++] = 0;
1004 arr[num++] = (port_group_id >> 8) & 0xff;
1005 arr[num++] = port_group_id & 0xff;
1006 /* NAA-5, Target device identifier */
1007 arr[num++] = 0x61; /* proto=sas, binary */
1008 arr[num++] = 0xa3; /* piv=1, target device, naa */
1009 arr[num++] = 0x0;
1010 arr[num++] = 0x8;
1011 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
1012 arr[num++] = 0x22;
1013 arr[num++] = 0x22;
1014 arr[num++] = 0x20;
1015 arr[num++] = (target_dev_id >> 24);
1016 arr[num++] = (target_dev_id >> 16) & 0xff;
1017 arr[num++] = (target_dev_id >> 8) & 0xff;
1018 arr[num++] = target_dev_id & 0xff;
1019 /* SCSI name string: Target device identifier */
1020 arr[num++] = 0x63; /* proto=sas, UTF-8 */
1021 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
1022 arr[num++] = 0x0;
1023 arr[num++] = 24;
1024 memcpy(arr + num, "naa.52222220", 12);
1025 num += 12;
1026 snprintf(b, sizeof(b), "%08X", target_dev_id);
1027 memcpy(arr + num, b, 8);
1028 num += 8;
1029 memset(arr + num, 0, 4);
1030 num += 4;
1031 return num;
1032}
1033
1034
1035static unsigned char vpd84_data[] = {
1036/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
1037 0x22,0x22,0x22,0x0,0xbb,0x1,
1038 0x22,0x22,0x22,0x0,0xbb,0x2,
1039};
1040
1041/* Software interface identification VPD page */
1042static int inquiry_evpd_84(unsigned char * arr)
1043{
1044 memcpy(arr, vpd84_data, sizeof(vpd84_data));
1045 return sizeof(vpd84_data);
1046}
1047
1048/* Management network addresses VPD page */
1049static int inquiry_evpd_85(unsigned char * arr)
1050{
1051 int num = 0;
1052 const char * na1 = "https://www.kernel.org/config";
1053 const char * na2 = "http://www.kernel.org/log";
1054 int plen, olen;
1055
1056 arr[num++] = 0x1; /* lu, storage config */
1057 arr[num++] = 0x0; /* reserved */
1058 arr[num++] = 0x0;
1059 olen = strlen(na1);
1060 plen = olen + 1;
1061 if (plen % 4)
1062 plen = ((plen / 4) + 1) * 4;
1063 arr[num++] = plen; /* length, null termianted, padded */
1064 memcpy(arr + num, na1, olen);
1065 memset(arr + num + olen, 0, plen - olen);
1066 num += plen;
1067
1068 arr[num++] = 0x4; /* lu, logging */
1069 arr[num++] = 0x0; /* reserved */
1070 arr[num++] = 0x0;
1071 olen = strlen(na2);
1072 plen = olen + 1;
1073 if (plen % 4)
1074 plen = ((plen / 4) + 1) * 4;
1075 arr[num++] = plen; /* length, null terminated, padded */
1076 memcpy(arr + num, na2, olen);
1077 memset(arr + num + olen, 0, plen - olen);
1078 num += plen;
1079
1080 return num;
1081}
1082
1083/* SCSI ports VPD page */
1084static int inquiry_evpd_88(unsigned char * arr, int target_dev_id)
1085{
1086 int num = 0;
1087 int port_a, port_b;
1088
1089 port_a = target_dev_id + 1;
1090 port_b = port_a + 1;
1091 arr[num++] = 0x0; /* reserved */
1092 arr[num++] = 0x0; /* reserved */
1093 arr[num++] = 0x0;
1094 arr[num++] = 0x1; /* relative port 1 (primary) */
1095 memset(arr + num, 0, 6);
1096 num += 6;
1097 arr[num++] = 0x0;
1098 arr[num++] = 12; /* length tp descriptor */
1099 /* naa-5 target port identifier (A) */
1100 arr[num++] = 0x61; /* proto=sas, binary */
1101 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1102 arr[num++] = 0x0; /* reserved */
1103 arr[num++] = 0x8; /* length */
1104 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
1105 arr[num++] = 0x22;
1106 arr[num++] = 0x22;
1107 arr[num++] = 0x20;
1108 arr[num++] = (port_a >> 24);
1109 arr[num++] = (port_a >> 16) & 0xff;
1110 arr[num++] = (port_a >> 8) & 0xff;
1111 arr[num++] = port_a & 0xff;
1112
1113 arr[num++] = 0x0; /* reserved */
1114 arr[num++] = 0x0; /* reserved */
1115 arr[num++] = 0x0;
1116 arr[num++] = 0x2; /* relative port 2 (secondary) */
1117 memset(arr + num, 0, 6);
1118 num += 6;
1119 arr[num++] = 0x0;
1120 arr[num++] = 12; /* length tp descriptor */
1121 /* naa-5 target port identifier (B) */
1122 arr[num++] = 0x61; /* proto=sas, binary */
1123 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1124 arr[num++] = 0x0; /* reserved */
1125 arr[num++] = 0x8; /* length */
1126 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
1127 arr[num++] = 0x22;
1128 arr[num++] = 0x22;
1129 arr[num++] = 0x20;
1130 arr[num++] = (port_b >> 24);
1131 arr[num++] = (port_b >> 16) & 0xff;
1132 arr[num++] = (port_b >> 8) & 0xff;
1133 arr[num++] = port_b & 0xff;
1134
1135 return num;
1136}
1137
1138
1139static unsigned char vpd89_data[] = {
1140/* from 4th byte */ 0,0,0,0,
1141'l','i','n','u','x',' ',' ',' ',
1142'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
1143'1','2','3','4',
11440x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
11450xec,0,0,0,
11460x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
11470,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
11480x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
11490x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
11500x53,0x41,
11510x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
11520x20,0x20,
11530x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
11540x10,0x80,
11550,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
11560x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
11570x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
11580,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
11590x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
11600x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
11610,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
11620,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11630,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11640,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11650x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
11660,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
11670xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
11680,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
11690,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11700,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11710,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11720,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11730,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11740,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11750,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11760,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11770,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11780,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11790,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
11800,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
1181};
1182
1183/* ATA Information VPD page */
1184static int inquiry_evpd_89(unsigned char * arr)
1185{
1186 memcpy(arr, vpd89_data, sizeof(vpd89_data));
1187 return sizeof(vpd89_data);
1188}
1189
1190
1191static unsigned char vpdb0_data[] = {
1192 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
1193 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1194 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1195 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1196};
1197
1198/* Block limits VPD page (SBC-3) */
1199static int inquiry_evpd_b0(unsigned char * arr)
1200{
1201 unsigned int gran;
1202
1203 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
1204
1205 /* Optimal transfer length granularity */
1206 gran = 1 << scsi_debug_physblk_exp;
1207 arr[2] = (gran >> 8) & 0xff;
1208 arr[3] = gran & 0xff;
1209
1210 /* Maximum Transfer Length */
1211 if (sdebug_store_sectors > 0x400) {
1212 arr[4] = (sdebug_store_sectors >> 24) & 0xff;
1213 arr[5] = (sdebug_store_sectors >> 16) & 0xff;
1214 arr[6] = (sdebug_store_sectors >> 8) & 0xff;
1215 arr[7] = sdebug_store_sectors & 0xff;
1216 }
1217
1218 /* Optimal Transfer Length */
1219 put_unaligned_be32(scsi_debug_opt_blks, &arr[8]);
1220
1221 if (scsi_debug_lbpu) {
1222 /* Maximum Unmap LBA Count */
1223 put_unaligned_be32(scsi_debug_unmap_max_blocks, &arr[16]);
1224
1225 /* Maximum Unmap Block Descriptor Count */
1226 put_unaligned_be32(scsi_debug_unmap_max_desc, &arr[20]);
1227 }
1228
1229 /* Unmap Granularity Alignment */
1230 if (scsi_debug_unmap_alignment) {
1231 put_unaligned_be32(scsi_debug_unmap_alignment, &arr[28]);
1232 arr[28] |= 0x80; /* UGAVALID */
1233 }
1234
1235 /* Optimal Unmap Granularity */
1236 put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]);
1237
1238 /* Maximum WRITE SAME Length */
1239 put_unaligned_be64(scsi_debug_write_same_length, &arr[32]);
1240
1241 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
1242
1243 return sizeof(vpdb0_data);
1244}
1245
1246/* Block device characteristics VPD page (SBC-3) */
1247static int inquiry_evpd_b1(unsigned char *arr)
1248{
1249 memset(arr, 0, 0x3c);
1250 arr[0] = 0;
1251 arr[1] = 1; /* non rotating medium (e.g. solid state) */
1252 arr[2] = 0;
1253 arr[3] = 5; /* less than 1.8" */
1254
1255 return 0x3c;
1256}
1257
1258/* Logical block provisioning VPD page (SBC-3) */
1259static int inquiry_evpd_b2(unsigned char *arr)
1260{
1261 memset(arr, 0, 0x4);
1262 arr[0] = 0; /* threshold exponent */
1263
1264 if (scsi_debug_lbpu)
1265 arr[1] = 1 << 7;
1266
1267 if (scsi_debug_lbpws)
1268 arr[1] |= 1 << 6;
1269
1270 if (scsi_debug_lbpws10)
1271 arr[1] |= 1 << 5;
1272
1273 if (scsi_debug_lbprz)
1274 arr[1] |= 1 << 2;
1275
1276 return 0x4;
1277}
1278
1279#define SDEBUG_LONG_INQ_SZ 96
1280#define SDEBUG_MAX_INQ_ARR_SZ 584
1281
1282static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1283{
1284 unsigned char pq_pdt;
1285 unsigned char * arr;
1286 unsigned char *cmd = scp->cmnd;
1287 int alloc_len, n, ret;
1288 bool have_wlun;
1289
1290 alloc_len = (cmd[3] << 8) + cmd[4];
1291 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
1292 if (! arr)
1293 return DID_REQUEUE << 16;
1294 have_wlun = (scp->device->lun == SCSI_W_LUN_REPORT_LUNS);
1295 if (have_wlun)
1296 pq_pdt = 0x1e; /* present, wlun */
1297 else if (scsi_debug_no_lun_0 && (0 == devip->lun))
1298 pq_pdt = 0x7f; /* not present, no device type */
1299 else
1300 pq_pdt = (scsi_debug_ptype & 0x1f);
1301 arr[0] = pq_pdt;
1302 if (0x2 & cmd[1]) { /* CMDDT bit set */
1303 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
1304 kfree(arr);
1305 return check_condition_result;
1306 } else if (0x1 & cmd[1]) { /* EVPD bit set */
1307 int lu_id_num, port_group_id, target_dev_id, len;
1308 char lu_id_str[6];
1309 int host_no = devip->sdbg_host->shost->host_no;
1310
1311 port_group_id = (((host_no + 1) & 0x7f) << 8) +
1312 (devip->channel & 0x7f);
1313 if (0 == scsi_debug_vpd_use_hostno)
1314 host_no = 0;
1315 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) +
1316 (devip->target * 1000) + devip->lun);
1317 target_dev_id = ((host_no + 1) * 2000) +
1318 (devip->target * 1000) - 3;
1319 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
1320 if (0 == cmd[2]) { /* supported vital product data pages */
1321 arr[1] = cmd[2]; /*sanity */
1322 n = 4;
1323 arr[n++] = 0x0; /* this page */
1324 arr[n++] = 0x80; /* unit serial number */
1325 arr[n++] = 0x83; /* device identification */
1326 arr[n++] = 0x84; /* software interface ident. */
1327 arr[n++] = 0x85; /* management network addresses */
1328 arr[n++] = 0x86; /* extended inquiry */
1329 arr[n++] = 0x87; /* mode page policy */
1330 arr[n++] = 0x88; /* SCSI ports */
1331 arr[n++] = 0x89; /* ATA information */
1332 arr[n++] = 0xb0; /* Block limits (SBC) */
1333 arr[n++] = 0xb1; /* Block characteristics (SBC) */
1334 if (scsi_debug_lbp()) /* Logical Block Prov. (SBC) */
1335 arr[n++] = 0xb2;
1336 arr[3] = n - 4; /* number of supported VPD pages */
1337 } else if (0x80 == cmd[2]) { /* unit serial number */
1338 arr[1] = cmd[2]; /*sanity */
1339 arr[3] = len;
1340 memcpy(&arr[4], lu_id_str, len);
1341 } else if (0x83 == cmd[2]) { /* device identification */
1342 arr[1] = cmd[2]; /*sanity */
1343 arr[3] = inquiry_evpd_83(&arr[4], port_group_id,
1344 target_dev_id, lu_id_num,
1345 lu_id_str, len);
1346 } else if (0x84 == cmd[2]) { /* Software interface ident. */
1347 arr[1] = cmd[2]; /*sanity */
1348 arr[3] = inquiry_evpd_84(&arr[4]);
1349 } else if (0x85 == cmd[2]) { /* Management network addresses */
1350 arr[1] = cmd[2]; /*sanity */
1351 arr[3] = inquiry_evpd_85(&arr[4]);
1352 } else if (0x86 == cmd[2]) { /* extended inquiry */
1353 arr[1] = cmd[2]; /*sanity */
1354 arr[3] = 0x3c; /* number of following entries */
1355 if (scsi_debug_dif == SD_DIF_TYPE3_PROTECTION)
1356 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
1357 else if (scsi_debug_dif)
1358 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
1359 else
1360 arr[4] = 0x0; /* no protection stuff */
1361 arr[5] = 0x7; /* head of q, ordered + simple q's */
1362 } else if (0x87 == cmd[2]) { /* mode page policy */
1363 arr[1] = cmd[2]; /*sanity */
1364 arr[3] = 0x8; /* number of following entries */
1365 arr[4] = 0x2; /* disconnect-reconnect mp */
1366 arr[6] = 0x80; /* mlus, shared */
1367 arr[8] = 0x18; /* protocol specific lu */
1368 arr[10] = 0x82; /* mlus, per initiator port */
1369 } else if (0x88 == cmd[2]) { /* SCSI Ports */
1370 arr[1] = cmd[2]; /*sanity */
1371 arr[3] = inquiry_evpd_88(&arr[4], target_dev_id);
1372 } else if (0x89 == cmd[2]) { /* ATA information */
1373 arr[1] = cmd[2]; /*sanity */
1374 n = inquiry_evpd_89(&arr[4]);
1375 arr[2] = (n >> 8);
1376 arr[3] = (n & 0xff);
1377 } else if (0xb0 == cmd[2]) { /* Block limits (SBC) */
1378 arr[1] = cmd[2]; /*sanity */
1379 arr[3] = inquiry_evpd_b0(&arr[4]);
1380 } else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */
1381 arr[1] = cmd[2]; /*sanity */
1382 arr[3] = inquiry_evpd_b1(&arr[4]);
1383 } else if (0xb2 == cmd[2]) { /* Logical Block Prov. (SBC) */
1384 arr[1] = cmd[2]; /*sanity */
1385 arr[3] = inquiry_evpd_b2(&arr[4]);
1386 } else {
1387 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
1388 kfree(arr);
1389 return check_condition_result;
1390 }
1391 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
1392 ret = fill_from_dev_buffer(scp, arr,
1393 min(len, SDEBUG_MAX_INQ_ARR_SZ));
1394 kfree(arr);
1395 return ret;
1396 }
1397 /* drops through here for a standard inquiry */
1398 arr[1] = scsi_debug_removable ? 0x80 : 0; /* Removable disk */
1399 arr[2] = scsi_debug_scsi_level;
1400 arr[3] = 2; /* response_data_format==2 */
1401 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
1402 arr[5] = scsi_debug_dif ? 1 : 0; /* PROTECT bit */
1403 if (0 == scsi_debug_vpd_use_hostno)
1404 arr[5] = 0x10; /* claim: implicit TGPS */
1405 arr[6] = 0x10; /* claim: MultiP */
1406 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
1407 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
1408 memcpy(&arr[8], inq_vendor_id, 8);
1409 memcpy(&arr[16], inq_product_id, 16);
1410 memcpy(&arr[32], inq_product_rev, 4);
1411 /* version descriptors (2 bytes each) follow */
1412 arr[58] = 0x0; arr[59] = 0xa2; /* SAM-5 rev 4 */
1413 arr[60] = 0x4; arr[61] = 0x68; /* SPC-4 rev 37 */
1414 n = 62;
1415 if (scsi_debug_ptype == 0) {
1416 arr[n++] = 0x4; arr[n++] = 0xc5; /* SBC-4 rev 36 */
1417 } else if (scsi_debug_ptype == 1) {
1418 arr[n++] = 0x5; arr[n++] = 0x25; /* SSC-4 rev 3 */
1419 }
1420 arr[n++] = 0x20; arr[n++] = 0xe6; /* SPL-3 rev 7 */
1421 ret = fill_from_dev_buffer(scp, arr,
1422 min(alloc_len, SDEBUG_LONG_INQ_SZ));
1423 kfree(arr);
1424 return ret;
1425}
1426
1427static int resp_requests(struct scsi_cmnd * scp,
1428 struct sdebug_dev_info * devip)
1429{
1430 unsigned char * sbuff;
1431 unsigned char *cmd = scp->cmnd;
1432 unsigned char arr[SCSI_SENSE_BUFFERSIZE];
1433 bool dsense;
1434 int len = 18;
1435
1436 memset(arr, 0, sizeof(arr));
1437 dsense = !!(cmd[1] & 1);
1438 sbuff = scp->sense_buffer;
1439 if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
1440 if (dsense) {
1441 arr[0] = 0x72;
1442 arr[1] = 0x0; /* NO_SENSE in sense_key */
1443 arr[2] = THRESHOLD_EXCEEDED;
1444 arr[3] = 0xff; /* TEST set and MRIE==6 */
1445 len = 8;
1446 } else {
1447 arr[0] = 0x70;
1448 arr[2] = 0x0; /* NO_SENSE in sense_key */
1449 arr[7] = 0xa; /* 18 byte sense buffer */
1450 arr[12] = THRESHOLD_EXCEEDED;
1451 arr[13] = 0xff; /* TEST set and MRIE==6 */
1452 }
1453 } else {
1454 memcpy(arr, sbuff, SCSI_SENSE_BUFFERSIZE);
1455 if (arr[0] >= 0x70 && dsense == scsi_debug_dsense)
1456 ; /* have sense and formats match */
1457 else if (arr[0] <= 0x70) {
1458 if (dsense) {
1459 memset(arr, 0, 8);
1460 arr[0] = 0x72;
1461 len = 8;
1462 } else {
1463 memset(arr, 0, 18);
1464 arr[0] = 0x70;
1465 arr[7] = 0xa;
1466 }
1467 } else if (dsense) {
1468 memset(arr, 0, 8);
1469 arr[0] = 0x72;
1470 arr[1] = sbuff[2]; /* sense key */
1471 arr[2] = sbuff[12]; /* asc */
1472 arr[3] = sbuff[13]; /* ascq */
1473 len = 8;
1474 } else {
1475 memset(arr, 0, 18);
1476 arr[0] = 0x70;
1477 arr[2] = sbuff[1];
1478 arr[7] = 0xa;
1479 arr[12] = sbuff[1];
1480 arr[13] = sbuff[3];
1481 }
1482
1483 }
1484 mk_sense_buffer(scp, 0, NO_ADDITIONAL_SENSE, 0);
1485 return fill_from_dev_buffer(scp, arr, len);
1486}
1487
1488static int resp_start_stop(struct scsi_cmnd * scp,
1489 struct sdebug_dev_info * devip)
1490{
1491 unsigned char *cmd = scp->cmnd;
1492 int power_cond, start;
1493
1494 power_cond = (cmd[4] & 0xf0) >> 4;
1495 if (power_cond) {
1496 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
1497 return check_condition_result;
1498 }
1499 start = cmd[4] & 1;
1500 if (start == devip->stopped)
1501 devip->stopped = !start;
1502 return 0;
1503}
1504
1505static sector_t get_sdebug_capacity(void)
1506{
1507 if (scsi_debug_virtual_gb > 0)
1508 return (sector_t)scsi_debug_virtual_gb *
1509 (1073741824 / scsi_debug_sector_size);
1510 else
1511 return sdebug_store_sectors;
1512}
1513
1514#define SDEBUG_READCAP_ARR_SZ 8
1515static int resp_readcap(struct scsi_cmnd * scp,
1516 struct sdebug_dev_info * devip)
1517{
1518 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
1519 unsigned int capac;
1520
1521 /* following just in case virtual_gb changed */
1522 sdebug_capacity = get_sdebug_capacity();
1523 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
1524 if (sdebug_capacity < 0xffffffff) {
1525 capac = (unsigned int)sdebug_capacity - 1;
1526 arr[0] = (capac >> 24);
1527 arr[1] = (capac >> 16) & 0xff;
1528 arr[2] = (capac >> 8) & 0xff;
1529 arr[3] = capac & 0xff;
1530 } else {
1531 arr[0] = 0xff;
1532 arr[1] = 0xff;
1533 arr[2] = 0xff;
1534 arr[3] = 0xff;
1535 }
1536 arr[6] = (scsi_debug_sector_size >> 8) & 0xff;
1537 arr[7] = scsi_debug_sector_size & 0xff;
1538 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1539}
1540
1541#define SDEBUG_READCAP16_ARR_SZ 32
1542static int resp_readcap16(struct scsi_cmnd * scp,
1543 struct sdebug_dev_info * devip)
1544{
1545 unsigned char *cmd = scp->cmnd;
1546 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
1547 unsigned long long capac;
1548 int k, alloc_len;
1549
1550 alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8)
1551 + cmd[13]);
1552 /* following just in case virtual_gb changed */
1553 sdebug_capacity = get_sdebug_capacity();
1554 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
1555 capac = sdebug_capacity - 1;
1556 for (k = 0; k < 8; ++k, capac >>= 8)
1557 arr[7 - k] = capac & 0xff;
1558 arr[8] = (scsi_debug_sector_size >> 24) & 0xff;
1559 arr[9] = (scsi_debug_sector_size >> 16) & 0xff;
1560 arr[10] = (scsi_debug_sector_size >> 8) & 0xff;
1561 arr[11] = scsi_debug_sector_size & 0xff;
1562 arr[13] = scsi_debug_physblk_exp & 0xf;
1563 arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f;
1564
1565 if (scsi_debug_lbp()) {
1566 arr[14] |= 0x80; /* LBPME */
1567 if (scsi_debug_lbprz)
1568 arr[14] |= 0x40; /* LBPRZ */
1569 }
1570
1571 arr[15] = scsi_debug_lowest_aligned & 0xff;
1572
1573 if (scsi_debug_dif) {
1574 arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */
1575 arr[12] |= 1; /* PROT_EN */
1576 }
1577
1578 return fill_from_dev_buffer(scp, arr,
1579 min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
1580}
1581
1582#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1583
1584static int resp_report_tgtpgs(struct scsi_cmnd * scp,
1585 struct sdebug_dev_info * devip)
1586{
1587 unsigned char *cmd = scp->cmnd;
1588 unsigned char * arr;
1589 int host_no = devip->sdbg_host->shost->host_no;
1590 int n, ret, alen, rlen;
1591 int port_group_a, port_group_b, port_a, port_b;
1592
1593 alen = ((cmd[6] << 24) + (cmd[7] << 16) + (cmd[8] << 8)
1594 + cmd[9]);
1595
1596 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1597 if (! arr)
1598 return DID_REQUEUE << 16;
1599 /*
1600 * EVPD page 0x88 states we have two ports, one
1601 * real and a fake port with no device connected.
1602 * So we create two port groups with one port each
1603 * and set the group with port B to unavailable.
1604 */
1605 port_a = 0x1; /* relative port A */
1606 port_b = 0x2; /* relative port B */
1607 port_group_a = (((host_no + 1) & 0x7f) << 8) +
1608 (devip->channel & 0x7f);
1609 port_group_b = (((host_no + 1) & 0x7f) << 8) +
1610 (devip->channel & 0x7f) + 0x80;
1611
1612 /*
1613 * The asymmetric access state is cycled according to the host_id.
1614 */
1615 n = 4;
1616 if (0 == scsi_debug_vpd_use_hostno) {
1617 arr[n++] = host_no % 3; /* Asymm access state */
1618 arr[n++] = 0x0F; /* claim: all states are supported */
1619 } else {
1620 arr[n++] = 0x0; /* Active/Optimized path */
1621 arr[n++] = 0x01; /* claim: only support active/optimized paths */
1622 }
1623 arr[n++] = (port_group_a >> 8) & 0xff;
1624 arr[n++] = port_group_a & 0xff;
1625 arr[n++] = 0; /* Reserved */
1626 arr[n++] = 0; /* Status code */
1627 arr[n++] = 0; /* Vendor unique */
1628 arr[n++] = 0x1; /* One port per group */
1629 arr[n++] = 0; /* Reserved */
1630 arr[n++] = 0; /* Reserved */
1631 arr[n++] = (port_a >> 8) & 0xff;
1632 arr[n++] = port_a & 0xff;
1633 arr[n++] = 3; /* Port unavailable */
1634 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
1635 arr[n++] = (port_group_b >> 8) & 0xff;
1636 arr[n++] = port_group_b & 0xff;
1637 arr[n++] = 0; /* Reserved */
1638 arr[n++] = 0; /* Status code */
1639 arr[n++] = 0; /* Vendor unique */
1640 arr[n++] = 0x1; /* One port per group */
1641 arr[n++] = 0; /* Reserved */
1642 arr[n++] = 0; /* Reserved */
1643 arr[n++] = (port_b >> 8) & 0xff;
1644 arr[n++] = port_b & 0xff;
1645
1646 rlen = n - 4;
1647 arr[0] = (rlen >> 24) & 0xff;
1648 arr[1] = (rlen >> 16) & 0xff;
1649 arr[2] = (rlen >> 8) & 0xff;
1650 arr[3] = rlen & 0xff;
1651
1652 /*
1653 * Return the smallest value of either
1654 * - The allocated length
1655 * - The constructed command length
1656 * - The maximum array size
1657 */
1658 rlen = min(alen,n);
1659 ret = fill_from_dev_buffer(scp, arr,
1660 min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1661 kfree(arr);
1662 return ret;
1663}
1664
1665static int
1666resp_rsup_opcodes(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1667{
1668 bool rctd;
1669 u8 reporting_opts, req_opcode, sdeb_i, supp;
1670 u16 req_sa, u;
1671 u32 alloc_len, a_len;
1672 int k, offset, len, errsts, count, bump, na;
1673 const struct opcode_info_t *oip;
1674 const struct opcode_info_t *r_oip;
1675 u8 *arr;
1676 u8 *cmd = scp->cmnd;
1677
1678 rctd = !!(cmd[2] & 0x80);
1679 reporting_opts = cmd[2] & 0x7;
1680 req_opcode = cmd[3];
1681 req_sa = get_unaligned_be16(cmd + 4);
1682 alloc_len = get_unaligned_be32(cmd + 6);
1683 if (alloc_len < 4 || alloc_len > 0xffff) {
1684 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1685 return check_condition_result;
1686 }
1687 if (alloc_len > 8192)
1688 a_len = 8192;
1689 else
1690 a_len = alloc_len;
1691 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC);
1692 if (NULL == arr) {
1693 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
1694 INSUFF_RES_ASCQ);
1695 return check_condition_result;
1696 }
1697 switch (reporting_opts) {
1698 case 0: /* all commands */
1699 /* count number of commands */
1700 for (count = 0, oip = opcode_info_arr;
1701 oip->num_attached != 0xff; ++oip) {
1702 if (F_INV_OP & oip->flags)
1703 continue;
1704 count += (oip->num_attached + 1);
1705 }
1706 bump = rctd ? 20 : 8;
1707 put_unaligned_be32(count * bump, arr);
1708 for (offset = 4, oip = opcode_info_arr;
1709 oip->num_attached != 0xff && offset < a_len; ++oip) {
1710 if (F_INV_OP & oip->flags)
1711 continue;
1712 na = oip->num_attached;
1713 arr[offset] = oip->opcode;
1714 put_unaligned_be16(oip->sa, arr + offset + 2);
1715 if (rctd)
1716 arr[offset + 5] |= 0x2;
1717 if (FF_SA & oip->flags)
1718 arr[offset + 5] |= 0x1;
1719 put_unaligned_be16(oip->len_mask[0], arr + offset + 6);
1720 if (rctd)
1721 put_unaligned_be16(0xa, arr + offset + 8);
1722 r_oip = oip;
1723 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) {
1724 if (F_INV_OP & oip->flags)
1725 continue;
1726 offset += bump;
1727 arr[offset] = oip->opcode;
1728 put_unaligned_be16(oip->sa, arr + offset + 2);
1729 if (rctd)
1730 arr[offset + 5] |= 0x2;
1731 if (FF_SA & oip->flags)
1732 arr[offset + 5] |= 0x1;
1733 put_unaligned_be16(oip->len_mask[0],
1734 arr + offset + 6);
1735 if (rctd)
1736 put_unaligned_be16(0xa,
1737 arr + offset + 8);
1738 }
1739 oip = r_oip;
1740 offset += bump;
1741 }
1742 break;
1743 case 1: /* one command: opcode only */
1744 case 2: /* one command: opcode plus service action */
1745 case 3: /* one command: if sa==0 then opcode only else opcode+sa */
1746 sdeb_i = opcode_ind_arr[req_opcode];
1747 oip = &opcode_info_arr[sdeb_i];
1748 if (F_INV_OP & oip->flags) {
1749 supp = 1;
1750 offset = 4;
1751 } else {
1752 if (1 == reporting_opts) {
1753 if (FF_SA & oip->flags) {
1754 mk_sense_invalid_fld(scp, SDEB_IN_CDB,
1755 2, 2);
1756 kfree(arr);
1757 return check_condition_result;
1758 }
1759 req_sa = 0;
1760 } else if (2 == reporting_opts &&
1761 0 == (FF_SA & oip->flags)) {
1762 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
1763 kfree(arr); /* point at requested sa */
1764 return check_condition_result;
1765 }
1766 if (0 == (FF_SA & oip->flags) &&
1767 req_opcode == oip->opcode)
1768 supp = 3;
1769 else if (0 == (FF_SA & oip->flags)) {
1770 na = oip->num_attached;
1771 for (k = 0, oip = oip->arrp; k < na;
1772 ++k, ++oip) {
1773 if (req_opcode == oip->opcode)
1774 break;
1775 }
1776 supp = (k >= na) ? 1 : 3;
1777 } else if (req_sa != oip->sa) {
1778 na = oip->num_attached;
1779 for (k = 0, oip = oip->arrp; k < na;
1780 ++k, ++oip) {
1781 if (req_sa == oip->sa)
1782 break;
1783 }
1784 supp = (k >= na) ? 1 : 3;
1785 } else
1786 supp = 3;
1787 if (3 == supp) {
1788 u = oip->len_mask[0];
1789 put_unaligned_be16(u, arr + 2);
1790 arr[4] = oip->opcode;
1791 for (k = 1; k < u; ++k)
1792 arr[4 + k] = (k < 16) ?
1793 oip->len_mask[k] : 0xff;
1794 offset = 4 + u;
1795 } else
1796 offset = 4;
1797 }
1798 arr[1] = (rctd ? 0x80 : 0) | supp;
1799 if (rctd) {
1800 put_unaligned_be16(0xa, arr + offset);
1801 offset += 12;
1802 }
1803 break;
1804 default:
1805 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
1806 kfree(arr);
1807 return check_condition_result;
1808 }
1809 offset = (offset < a_len) ? offset : a_len;
1810 len = (offset < alloc_len) ? offset : alloc_len;
1811 errsts = fill_from_dev_buffer(scp, arr, len);
1812 kfree(arr);
1813 return errsts;
1814}
1815
1816static int
1817resp_rsup_tmfs(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1818{
1819 bool repd;
1820 u32 alloc_len, len;
1821 u8 arr[16];
1822 u8 *cmd = scp->cmnd;
1823
1824 memset(arr, 0, sizeof(arr));
1825 repd = !!(cmd[2] & 0x80);
1826 alloc_len = get_unaligned_be32(cmd + 6);
1827 if (alloc_len < 4) {
1828 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1829 return check_condition_result;
1830 }
1831 arr[0] = 0xc8; /* ATS | ATSS | LURS */
1832 arr[1] = 0x1; /* ITNRS */
1833 if (repd) {
1834 arr[3] = 0xc;
1835 len = 16;
1836 } else
1837 len = 4;
1838
1839 len = (len < alloc_len) ? len : alloc_len;
1840 return fill_from_dev_buffer(scp, arr, len);
1841}
1842
1843/* <<Following mode page info copied from ST318451LW>> */
1844
1845static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target)
1846{ /* Read-Write Error Recovery page for mode_sense */
1847 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
1848 5, 0, 0xff, 0xff};
1849
1850 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
1851 if (1 == pcontrol)
1852 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
1853 return sizeof(err_recov_pg);
1854}
1855
1856static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target)
1857{ /* Disconnect-Reconnect page for mode_sense */
1858 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
1859 0, 0, 0, 0, 0, 0, 0, 0};
1860
1861 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
1862 if (1 == pcontrol)
1863 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
1864 return sizeof(disconnect_pg);
1865}
1866
1867static int resp_format_pg(unsigned char * p, int pcontrol, int target)
1868{ /* Format device page for mode_sense */
1869 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
1870 0, 0, 0, 0, 0, 0, 0, 0,
1871 0, 0, 0, 0, 0x40, 0, 0, 0};
1872
1873 memcpy(p, format_pg, sizeof(format_pg));
1874 p[10] = (sdebug_sectors_per >> 8) & 0xff;
1875 p[11] = sdebug_sectors_per & 0xff;
1876 p[12] = (scsi_debug_sector_size >> 8) & 0xff;
1877 p[13] = scsi_debug_sector_size & 0xff;
1878 if (scsi_debug_removable)
1879 p[20] |= 0x20; /* should agree with INQUIRY */
1880 if (1 == pcontrol)
1881 memset(p + 2, 0, sizeof(format_pg) - 2);
1882 return sizeof(format_pg);
1883}
1884
1885static int resp_caching_pg(unsigned char * p, int pcontrol, int target)
1886{ /* Caching page for mode_sense */
1887 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
1888 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
1889 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
1890 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
1891
1892 if (SCSI_DEBUG_OPT_N_WCE & scsi_debug_opts)
1893 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
1894 memcpy(p, caching_pg, sizeof(caching_pg));
1895 if (1 == pcontrol)
1896 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
1897 else if (2 == pcontrol)
1898 memcpy(p, d_caching_pg, sizeof(d_caching_pg));
1899 return sizeof(caching_pg);
1900}
1901
1902static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
1903{ /* Control mode page for mode_sense */
1904 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
1905 0, 0, 0, 0};
1906 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
1907 0, 0, 0x2, 0x4b};
1908
1909 if (scsi_debug_dsense)
1910 ctrl_m_pg[2] |= 0x4;
1911 else
1912 ctrl_m_pg[2] &= ~0x4;
1913
1914 if (scsi_debug_ato)
1915 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
1916
1917 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
1918 if (1 == pcontrol)
1919 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
1920 else if (2 == pcontrol)
1921 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
1922 return sizeof(ctrl_m_pg);
1923}
1924
1925
1926static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target)
1927{ /* Informational Exceptions control mode page for mode_sense */
1928 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
1929 0, 0, 0x0, 0x0};
1930 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1931 0, 0, 0x0, 0x0};
1932
1933 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
1934 if (1 == pcontrol)
1935 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
1936 else if (2 == pcontrol)
1937 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
1938 return sizeof(iec_m_pg);
1939}
1940
1941static int resp_sas_sf_m_pg(unsigned char * p, int pcontrol, int target)
1942{ /* SAS SSP mode page - short format for mode_sense */
1943 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
1944 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
1945
1946 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
1947 if (1 == pcontrol)
1948 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
1949 return sizeof(sas_sf_m_pg);
1950}
1951
1952
1953static int resp_sas_pcd_m_spg(unsigned char * p, int pcontrol, int target,
1954 int target_dev_id)
1955{ /* SAS phy control and discover mode page for mode_sense */
1956 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
1957 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
1958 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1959 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1960 0x2, 0, 0, 0, 0, 0, 0, 0,
1961 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1962 0, 0, 0, 0, 0, 0, 0, 0,
1963 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
1964 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1965 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1966 0x3, 0, 0, 0, 0, 0, 0, 0,
1967 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1968 0, 0, 0, 0, 0, 0, 0, 0,
1969 };
1970 int port_a, port_b;
1971
1972 port_a = target_dev_id + 1;
1973 port_b = port_a + 1;
1974 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
1975 p[20] = (port_a >> 24);
1976 p[21] = (port_a >> 16) & 0xff;
1977 p[22] = (port_a >> 8) & 0xff;
1978 p[23] = port_a & 0xff;
1979 p[48 + 20] = (port_b >> 24);
1980 p[48 + 21] = (port_b >> 16) & 0xff;
1981 p[48 + 22] = (port_b >> 8) & 0xff;
1982 p[48 + 23] = port_b & 0xff;
1983 if (1 == pcontrol)
1984 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
1985 return sizeof(sas_pcd_m_pg);
1986}
1987
1988static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol)
1989{ /* SAS SSP shared protocol specific port mode subpage */
1990 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
1991 0, 0, 0, 0, 0, 0, 0, 0,
1992 };
1993
1994 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
1995 if (1 == pcontrol)
1996 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
1997 return sizeof(sas_sha_m_pg);
1998}
1999
2000#define SDEBUG_MAX_MSENSE_SZ 256
2001
2002static int
2003resp_mode_sense(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2004{
2005 unsigned char dbd, llbaa;
2006 int pcontrol, pcode, subpcode, bd_len;
2007 unsigned char dev_spec;
2008 int k, alloc_len, msense_6, offset, len, target_dev_id;
2009 int target = scp->device->id;
2010 unsigned char * ap;
2011 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
2012 unsigned char *cmd = scp->cmnd;
2013
2014 dbd = !!(cmd[1] & 0x8);
2015 pcontrol = (cmd[2] & 0xc0) >> 6;
2016 pcode = cmd[2] & 0x3f;
2017 subpcode = cmd[3];
2018 msense_6 = (MODE_SENSE == cmd[0]);
2019 llbaa = msense_6 ? 0 : !!(cmd[1] & 0x10);
2020 if ((0 == scsi_debug_ptype) && (0 == dbd))
2021 bd_len = llbaa ? 16 : 8;
2022 else
2023 bd_len = 0;
2024 alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]);
2025 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
2026 if (0x3 == pcontrol) { /* Saving values not supported */
2027 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
2028 return check_condition_result;
2029 }
2030 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
2031 (devip->target * 1000) - 3;
2032 /* set DPOFUA bit for disks */
2033 if (0 == scsi_debug_ptype)
2034 dev_spec = (DEV_READONLY(target) ? 0x80 : 0x0) | 0x10;
2035 else
2036 dev_spec = 0x0;
2037 if (msense_6) {
2038 arr[2] = dev_spec;
2039 arr[3] = bd_len;
2040 offset = 4;
2041 } else {
2042 arr[3] = dev_spec;
2043 if (16 == bd_len)
2044 arr[4] = 0x1; /* set LONGLBA bit */
2045 arr[7] = bd_len; /* assume 255 or less */
2046 offset = 8;
2047 }
2048 ap = arr + offset;
2049 if ((bd_len > 0) && (!sdebug_capacity))
2050 sdebug_capacity = get_sdebug_capacity();
2051
2052 if (8 == bd_len) {
2053 if (sdebug_capacity > 0xfffffffe) {
2054 ap[0] = 0xff;
2055 ap[1] = 0xff;
2056 ap[2] = 0xff;
2057 ap[3] = 0xff;
2058 } else {
2059 ap[0] = (sdebug_capacity >> 24) & 0xff;
2060 ap[1] = (sdebug_capacity >> 16) & 0xff;
2061 ap[2] = (sdebug_capacity >> 8) & 0xff;
2062 ap[3] = sdebug_capacity & 0xff;
2063 }
2064 ap[6] = (scsi_debug_sector_size >> 8) & 0xff;
2065 ap[7] = scsi_debug_sector_size & 0xff;
2066 offset += bd_len;
2067 ap = arr + offset;
2068 } else if (16 == bd_len) {
2069 unsigned long long capac = sdebug_capacity;
2070
2071 for (k = 0; k < 8; ++k, capac >>= 8)
2072 ap[7 - k] = capac & 0xff;
2073 ap[12] = (scsi_debug_sector_size >> 24) & 0xff;
2074 ap[13] = (scsi_debug_sector_size >> 16) & 0xff;
2075 ap[14] = (scsi_debug_sector_size >> 8) & 0xff;
2076 ap[15] = scsi_debug_sector_size & 0xff;
2077 offset += bd_len;
2078 ap = arr + offset;
2079 }
2080
2081 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
2082 /* TODO: Control Extension page */
2083 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2084 return check_condition_result;
2085 }
2086 switch (pcode) {
2087 case 0x1: /* Read-Write error recovery page, direct access */
2088 len = resp_err_recov_pg(ap, pcontrol, target);
2089 offset += len;
2090 break;
2091 case 0x2: /* Disconnect-Reconnect page, all devices */
2092 len = resp_disconnect_pg(ap, pcontrol, target);
2093 offset += len;
2094 break;
2095 case 0x3: /* Format device page, direct access */
2096 len = resp_format_pg(ap, pcontrol, target);
2097 offset += len;
2098 break;
2099 case 0x8: /* Caching page, direct access */
2100 len = resp_caching_pg(ap, pcontrol, target);
2101 offset += len;
2102 break;
2103 case 0xa: /* Control Mode page, all devices */
2104 len = resp_ctrl_m_pg(ap, pcontrol, target);
2105 offset += len;
2106 break;
2107 case 0x19: /* if spc==1 then sas phy, control+discover */
2108 if ((subpcode > 0x2) && (subpcode < 0xff)) {
2109 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2110 return check_condition_result;
2111 }
2112 len = 0;
2113 if ((0x0 == subpcode) || (0xff == subpcode))
2114 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2115 if ((0x1 == subpcode) || (0xff == subpcode))
2116 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
2117 target_dev_id);
2118 if ((0x2 == subpcode) || (0xff == subpcode))
2119 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2120 offset += len;
2121 break;
2122 case 0x1c: /* Informational Exceptions Mode page, all devices */
2123 len = resp_iec_m_pg(ap, pcontrol, target);
2124 offset += len;
2125 break;
2126 case 0x3f: /* Read all Mode pages */
2127 if ((0 == subpcode) || (0xff == subpcode)) {
2128 len = resp_err_recov_pg(ap, pcontrol, target);
2129 len += resp_disconnect_pg(ap + len, pcontrol, target);
2130 len += resp_format_pg(ap + len, pcontrol, target);
2131 len += resp_caching_pg(ap + len, pcontrol, target);
2132 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
2133 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2134 if (0xff == subpcode) {
2135 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
2136 target, target_dev_id);
2137 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2138 }
2139 len += resp_iec_m_pg(ap + len, pcontrol, target);
2140 } else {
2141 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2142 return check_condition_result;
2143 }
2144 offset += len;
2145 break;
2146 default:
2147 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2148 return check_condition_result;
2149 }
2150 if (msense_6)
2151 arr[0] = offset - 1;
2152 else {
2153 arr[0] = ((offset - 2) >> 8) & 0xff;
2154 arr[1] = (offset - 2) & 0xff;
2155 }
2156 return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
2157}
2158
2159#define SDEBUG_MAX_MSELECT_SZ 512
2160
2161static int
2162resp_mode_select(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2163{
2164 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
2165 int param_len, res, mpage;
2166 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
2167 unsigned char *cmd = scp->cmnd;
2168 int mselect6 = (MODE_SELECT == cmd[0]);
2169
2170 memset(arr, 0, sizeof(arr));
2171 pf = cmd[1] & 0x10;
2172 sp = cmd[1] & 0x1;
2173 param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]);
2174 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
2175 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1);
2176 return check_condition_result;
2177 }
2178 res = fetch_to_dev_buffer(scp, arr, param_len);
2179 if (-1 == res)
2180 return (DID_ERROR << 16);
2181 else if ((res < param_len) &&
2182 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2183 sdev_printk(KERN_INFO, scp->device,
2184 "%s: cdb indicated=%d, IO sent=%d bytes\n",
2185 __func__, param_len, res);
2186 md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2);
2187 bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]);
2188 if (md_len > 2) {
2189 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1);
2190 return check_condition_result;
2191 }
2192 off = bd_len + (mselect6 ? 4 : 8);
2193 mpage = arr[off] & 0x3f;
2194 ps = !!(arr[off] & 0x80);
2195 if (ps) {
2196 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7);
2197 return check_condition_result;
2198 }
2199 spf = !!(arr[off] & 0x40);
2200 pg_len = spf ? ((arr[off + 2] << 8) + arr[off + 3] + 4) :
2201 (arr[off + 1] + 2);
2202 if ((pg_len + off) > param_len) {
2203 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2204 PARAMETER_LIST_LENGTH_ERR, 0);
2205 return check_condition_result;
2206 }
2207 switch (mpage) {
2208 case 0x8: /* Caching Mode page */
2209 if (caching_pg[1] == arr[off + 1]) {
2210 memcpy(caching_pg + 2, arr + off + 2,
2211 sizeof(caching_pg) - 2);
2212 goto set_mode_changed_ua;
2213 }
2214 break;
2215 case 0xa: /* Control Mode page */
2216 if (ctrl_m_pg[1] == arr[off + 1]) {
2217 memcpy(ctrl_m_pg + 2, arr + off + 2,
2218 sizeof(ctrl_m_pg) - 2);
2219 scsi_debug_dsense = !!(ctrl_m_pg[2] & 0x4);
2220 goto set_mode_changed_ua;
2221 }
2222 break;
2223 case 0x1c: /* Informational Exceptions Mode page */
2224 if (iec_m_pg[1] == arr[off + 1]) {
2225 memcpy(iec_m_pg + 2, arr + off + 2,
2226 sizeof(iec_m_pg) - 2);
2227 goto set_mode_changed_ua;
2228 }
2229 break;
2230 default:
2231 break;
2232 }
2233 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5);
2234 return check_condition_result;
2235set_mode_changed_ua:
2236 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
2237 return 0;
2238}
2239
2240static int resp_temp_l_pg(unsigned char * arr)
2241{
2242 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
2243 0x0, 0x1, 0x3, 0x2, 0x0, 65,
2244 };
2245
2246 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
2247 return sizeof(temp_l_pg);
2248}
2249
2250static int resp_ie_l_pg(unsigned char * arr)
2251{
2252 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
2253 };
2254
2255 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
2256 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
2257 arr[4] = THRESHOLD_EXCEEDED;
2258 arr[5] = 0xff;
2259 }
2260 return sizeof(ie_l_pg);
2261}
2262
2263#define SDEBUG_MAX_LSENSE_SZ 512
2264
2265static int resp_log_sense(struct scsi_cmnd * scp,
2266 struct sdebug_dev_info * devip)
2267{
2268 int ppc, sp, pcontrol, pcode, subpcode, alloc_len, len, n;
2269 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
2270 unsigned char *cmd = scp->cmnd;
2271
2272 memset(arr, 0, sizeof(arr));
2273 ppc = cmd[1] & 0x2;
2274 sp = cmd[1] & 0x1;
2275 if (ppc || sp) {
2276 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0);
2277 return check_condition_result;
2278 }
2279 pcontrol = (cmd[2] & 0xc0) >> 6;
2280 pcode = cmd[2] & 0x3f;
2281 subpcode = cmd[3] & 0xff;
2282 alloc_len = (cmd[7] << 8) + cmd[8];
2283 arr[0] = pcode;
2284 if (0 == subpcode) {
2285 switch (pcode) {
2286 case 0x0: /* Supported log pages log page */
2287 n = 4;
2288 arr[n++] = 0x0; /* this page */
2289 arr[n++] = 0xd; /* Temperature */
2290 arr[n++] = 0x2f; /* Informational exceptions */
2291 arr[3] = n - 4;
2292 break;
2293 case 0xd: /* Temperature log page */
2294 arr[3] = resp_temp_l_pg(arr + 4);
2295 break;
2296 case 0x2f: /* Informational exceptions log page */
2297 arr[3] = resp_ie_l_pg(arr + 4);
2298 break;
2299 default:
2300 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2301 return check_condition_result;
2302 }
2303 } else if (0xff == subpcode) {
2304 arr[0] |= 0x40;
2305 arr[1] = subpcode;
2306 switch (pcode) {
2307 case 0x0: /* Supported log pages and subpages log page */
2308 n = 4;
2309 arr[n++] = 0x0;
2310 arr[n++] = 0x0; /* 0,0 page */
2311 arr[n++] = 0x0;
2312 arr[n++] = 0xff; /* this page */
2313 arr[n++] = 0xd;
2314 arr[n++] = 0x0; /* Temperature */
2315 arr[n++] = 0x2f;
2316 arr[n++] = 0x0; /* Informational exceptions */
2317 arr[3] = n - 4;
2318 break;
2319 case 0xd: /* Temperature subpages */
2320 n = 4;
2321 arr[n++] = 0xd;
2322 arr[n++] = 0x0; /* Temperature */
2323 arr[3] = n - 4;
2324 break;
2325 case 0x2f: /* Informational exceptions subpages */
2326 n = 4;
2327 arr[n++] = 0x2f;
2328 arr[n++] = 0x0; /* Informational exceptions */
2329 arr[3] = n - 4;
2330 break;
2331 default:
2332 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2333 return check_condition_result;
2334 }
2335 } else {
2336 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2337 return check_condition_result;
2338 }
2339 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
2340 return fill_from_dev_buffer(scp, arr,
2341 min(len, SDEBUG_MAX_INQ_ARR_SZ));
2342}
2343
2344static int check_device_access_params(struct scsi_cmnd *scp,
2345 unsigned long long lba, unsigned int num)
2346{
2347 if (lba + num > sdebug_capacity) {
2348 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2349 return check_condition_result;
2350 }
2351 /* transfer length excessive (tie in to block limits VPD page) */
2352 if (num > sdebug_store_sectors) {
2353 /* needs work to find which cdb byte 'num' comes from */
2354 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2355 return check_condition_result;
2356 }
2357 return 0;
2358}
2359
2360/* Returns number of bytes copied or -1 if error. */
2361static int
2362do_device_access(struct scsi_cmnd *scmd, u64 lba, u32 num, bool do_write)
2363{
2364 int ret;
2365 u64 block, rest = 0;
2366 struct scsi_data_buffer *sdb;
2367 enum dma_data_direction dir;
2368
2369 if (do_write) {
2370 sdb = scsi_out(scmd);
2371 dir = DMA_TO_DEVICE;
2372 } else {
2373 sdb = scsi_in(scmd);
2374 dir = DMA_FROM_DEVICE;
2375 }
2376
2377 if (!sdb->length)
2378 return 0;
2379 if (!(scsi_bidi_cmnd(scmd) || scmd->sc_data_direction == dir))
2380 return -1;
2381
2382 block = do_div(lba, sdebug_store_sectors);
2383 if (block + num > sdebug_store_sectors)
2384 rest = block + num - sdebug_store_sectors;
2385
2386 ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
2387 fake_storep + (block * scsi_debug_sector_size),
2388 (num - rest) * scsi_debug_sector_size, 0, do_write);
2389 if (ret != (num - rest) * scsi_debug_sector_size)
2390 return ret;
2391
2392 if (rest) {
2393 ret += sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
2394 fake_storep, rest * scsi_debug_sector_size,
2395 (num - rest) * scsi_debug_sector_size, do_write);
2396 }
2397
2398 return ret;
2399}
2400
2401/* If fake_store(lba,num) compares equal to arr(num), then copy top half of
2402 * arr into fake_store(lba,num) and return true. If comparison fails then
2403 * return false. */
2404static bool
2405comp_write_worker(u64 lba, u32 num, const u8 *arr)
2406{
2407 bool res;
2408 u64 block, rest = 0;
2409 u32 store_blks = sdebug_store_sectors;
2410 u32 lb_size = scsi_debug_sector_size;
2411
2412 block = do_div(lba, store_blks);
2413 if (block + num > store_blks)
2414 rest = block + num - store_blks;
2415
2416 res = !memcmp(fake_storep + (block * lb_size), arr,
2417 (num - rest) * lb_size);
2418 if (!res)
2419 return res;
2420 if (rest)
2421 res = memcmp(fake_storep, arr + ((num - rest) * lb_size),
2422 rest * lb_size);
2423 if (!res)
2424 return res;
2425 arr += num * lb_size;
2426 memcpy(fake_storep + (block * lb_size), arr, (num - rest) * lb_size);
2427 if (rest)
2428 memcpy(fake_storep, arr + ((num - rest) * lb_size),
2429 rest * lb_size);
2430 return res;
2431}
2432
2433static __be16 dif_compute_csum(const void *buf, int len)
2434{
2435 __be16 csum;
2436
2437 if (scsi_debug_guard)
2438 csum = (__force __be16)ip_compute_csum(buf, len);
2439 else
2440 csum = cpu_to_be16(crc_t10dif(buf, len));
2441
2442 return csum;
2443}
2444
2445static int dif_verify(struct sd_dif_tuple *sdt, const void *data,
2446 sector_t sector, u32 ei_lba)
2447{
2448 __be16 csum = dif_compute_csum(data, scsi_debug_sector_size);
2449
2450 if (sdt->guard_tag != csum) {
2451 pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
2452 (unsigned long)sector,
2453 be16_to_cpu(sdt->guard_tag),
2454 be16_to_cpu(csum));
2455 return 0x01;
2456 }
2457 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION &&
2458 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
2459 pr_err("REF check failed on sector %lu\n",
2460 (unsigned long)sector);
2461 return 0x03;
2462 }
2463 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
2464 be32_to_cpu(sdt->ref_tag) != ei_lba) {
2465 pr_err("REF check failed on sector %lu\n",
2466 (unsigned long)sector);
2467 return 0x03;
2468 }
2469 return 0;
2470}
2471
2472static void dif_copy_prot(struct scsi_cmnd *SCpnt, sector_t sector,
2473 unsigned int sectors, bool read)
2474{
2475 size_t resid;
2476 void *paddr;
2477 const void *dif_store_end = dif_storep + sdebug_store_sectors;
2478 struct sg_mapping_iter miter;
2479
2480 /* Bytes of protection data to copy into sgl */
2481 resid = sectors * sizeof(*dif_storep);
2482
2483 sg_miter_start(&miter, scsi_prot_sglist(SCpnt),
2484 scsi_prot_sg_count(SCpnt), SG_MITER_ATOMIC |
2485 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
2486
2487 while (sg_miter_next(&miter) && resid > 0) {
2488 size_t len = min(miter.length, resid);
2489 void *start = dif_store(sector);
2490 size_t rest = 0;
2491
2492 if (dif_store_end < start + len)
2493 rest = start + len - dif_store_end;
2494
2495 paddr = miter.addr;
2496
2497 if (read)
2498 memcpy(paddr, start, len - rest);
2499 else
2500 memcpy(start, paddr, len - rest);
2501
2502 if (rest) {
2503 if (read)
2504 memcpy(paddr + len - rest, dif_storep, rest);
2505 else
2506 memcpy(dif_storep, paddr + len - rest, rest);
2507 }
2508
2509 sector += len / sizeof(*dif_storep);
2510 resid -= len;
2511 }
2512 sg_miter_stop(&miter);
2513}
2514
2515static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
2516 unsigned int sectors, u32 ei_lba)
2517{
2518 unsigned int i;
2519 struct sd_dif_tuple *sdt;
2520 sector_t sector;
2521
2522 for (i = 0; i < sectors; i++, ei_lba++) {
2523 int ret;
2524
2525 sector = start_sec + i;
2526 sdt = dif_store(sector);
2527
2528 if (sdt->app_tag == cpu_to_be16(0xffff))
2529 continue;
2530
2531 ret = dif_verify(sdt, fake_store(sector), sector, ei_lba);
2532 if (ret) {
2533 dif_errors++;
2534 return ret;
2535 }
2536 }
2537
2538 dif_copy_prot(SCpnt, start_sec, sectors, true);
2539 dix_reads++;
2540
2541 return 0;
2542}
2543
2544static int
2545resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2546{
2547 u8 *cmd = scp->cmnd;
2548 u64 lba;
2549 u32 num;
2550 u32 ei_lba;
2551 unsigned long iflags;
2552 int ret;
2553 bool check_prot;
2554
2555 switch (cmd[0]) {
2556 case READ_16:
2557 ei_lba = 0;
2558 lba = get_unaligned_be64(cmd + 2);
2559 num = get_unaligned_be32(cmd + 10);
2560 check_prot = true;
2561 break;
2562 case READ_10:
2563 ei_lba = 0;
2564 lba = get_unaligned_be32(cmd + 2);
2565 num = get_unaligned_be16(cmd + 7);
2566 check_prot = true;
2567 break;
2568 case READ_6:
2569 ei_lba = 0;
2570 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
2571 (u32)(cmd[1] & 0x1f) << 16;
2572 num = (0 == cmd[4]) ? 256 : cmd[4];
2573 check_prot = true;
2574 break;
2575 case READ_12:
2576 ei_lba = 0;
2577 lba = get_unaligned_be32(cmd + 2);
2578 num = get_unaligned_be32(cmd + 6);
2579 check_prot = true;
2580 break;
2581 case XDWRITEREAD_10:
2582 ei_lba = 0;
2583 lba = get_unaligned_be32(cmd + 2);
2584 num = get_unaligned_be16(cmd + 7);
2585 check_prot = false;
2586 break;
2587 default: /* assume READ(32) */
2588 lba = get_unaligned_be64(cmd + 12);
2589 ei_lba = get_unaligned_be32(cmd + 20);
2590 num = get_unaligned_be32(cmd + 28);
2591 check_prot = false;
2592 break;
2593 }
2594 if (check_prot) {
2595 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
2596 (cmd[1] & 0xe0)) {
2597 mk_sense_invalid_opcode(scp);
2598 return check_condition_result;
2599 }
2600 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
2601 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
2602 (cmd[1] & 0xe0) == 0)
2603 sdev_printk(KERN_ERR, scp->device, "Unprotected RD "
2604 "to DIF device\n");
2605 }
2606 if (sdebug_any_injecting_opt) {
2607 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
2608
2609 if (ep->inj_short)
2610 num /= 2;
2611 }
2612
2613 /* inline check_device_access_params() */
2614 if (lba + num > sdebug_capacity) {
2615 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2616 return check_condition_result;
2617 }
2618 /* transfer length excessive (tie in to block limits VPD page) */
2619 if (num > sdebug_store_sectors) {
2620 /* needs work to find which cdb byte 'num' comes from */
2621 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2622 return check_condition_result;
2623 }
2624
2625 if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) &&
2626 (lba <= (OPT_MEDIUM_ERR_ADDR + OPT_MEDIUM_ERR_NUM - 1)) &&
2627 ((lba + num) > OPT_MEDIUM_ERR_ADDR)) {
2628 /* claim unrecoverable read error */
2629 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
2630 /* set info field and valid bit for fixed descriptor */
2631 if (0x70 == (scp->sense_buffer[0] & 0x7f)) {
2632 scp->sense_buffer[0] |= 0x80; /* Valid bit */
2633 ret = (lba < OPT_MEDIUM_ERR_ADDR)
2634 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
2635 put_unaligned_be32(ret, scp->sense_buffer + 3);
2636 }
2637 scsi_set_resid(scp, scsi_bufflen(scp));
2638 return check_condition_result;
2639 }
2640
2641 read_lock_irqsave(&atomic_rw, iflags);
2642
2643 /* DIX + T10 DIF */
2644 if (scsi_debug_dix && scsi_prot_sg_count(scp)) {
2645 int prot_ret = prot_verify_read(scp, lba, num, ei_lba);
2646
2647 if (prot_ret) {
2648 read_unlock_irqrestore(&atomic_rw, iflags);
2649 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, prot_ret);
2650 return illegal_condition_result;
2651 }
2652 }
2653
2654 ret = do_device_access(scp, lba, num, false);
2655 read_unlock_irqrestore(&atomic_rw, iflags);
2656 if (ret == -1)
2657 return DID_ERROR << 16;
2658
2659 scsi_in(scp)->resid = scsi_bufflen(scp) - ret;
2660
2661 if (sdebug_any_injecting_opt) {
2662 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
2663
2664 if (ep->inj_recovered) {
2665 mk_sense_buffer(scp, RECOVERED_ERROR,
2666 THRESHOLD_EXCEEDED, 0);
2667 return check_condition_result;
2668 } else if (ep->inj_transport) {
2669 mk_sense_buffer(scp, ABORTED_COMMAND,
2670 TRANSPORT_PROBLEM, ACK_NAK_TO);
2671 return check_condition_result;
2672 } else if (ep->inj_dif) {
2673 /* Logical block guard check failed */
2674 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
2675 return illegal_condition_result;
2676 } else if (ep->inj_dix) {
2677 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
2678 return illegal_condition_result;
2679 }
2680 }
2681 return 0;
2682}
2683
2684static void dump_sector(unsigned char *buf, int len)
2685{
2686 int i, j, n;
2687
2688 pr_err(">>> Sector Dump <<<\n");
2689 for (i = 0 ; i < len ; i += 16) {
2690 char b[128];
2691
2692 for (j = 0, n = 0; j < 16; j++) {
2693 unsigned char c = buf[i+j];
2694
2695 if (c >= 0x20 && c < 0x7e)
2696 n += scnprintf(b + n, sizeof(b) - n,
2697 " %c ", buf[i+j]);
2698 else
2699 n += scnprintf(b + n, sizeof(b) - n,
2700 "%02x ", buf[i+j]);
2701 }
2702 pr_err("%04d: %s\n", i, b);
2703 }
2704}
2705
2706static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
2707 unsigned int sectors, u32 ei_lba)
2708{
2709 int ret;
2710 struct sd_dif_tuple *sdt;
2711 void *daddr;
2712 sector_t sector = start_sec;
2713 int ppage_offset;
2714 int dpage_offset;
2715 struct sg_mapping_iter diter;
2716 struct sg_mapping_iter piter;
2717
2718 BUG_ON(scsi_sg_count(SCpnt) == 0);
2719 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
2720
2721 sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
2722 scsi_prot_sg_count(SCpnt),
2723 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
2724 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
2725 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
2726
2727 /* For each protection page */
2728 while (sg_miter_next(&piter)) {
2729 dpage_offset = 0;
2730 if (WARN_ON(!sg_miter_next(&diter))) {
2731 ret = 0x01;
2732 goto out;
2733 }
2734
2735 for (ppage_offset = 0; ppage_offset < piter.length;
2736 ppage_offset += sizeof(struct sd_dif_tuple)) {
2737 /* If we're at the end of the current
2738 * data page advance to the next one
2739 */
2740 if (dpage_offset >= diter.length) {
2741 if (WARN_ON(!sg_miter_next(&diter))) {
2742 ret = 0x01;
2743 goto out;
2744 }
2745 dpage_offset = 0;
2746 }
2747
2748 sdt = piter.addr + ppage_offset;
2749 daddr = diter.addr + dpage_offset;
2750
2751 ret = dif_verify(sdt, daddr, sector, ei_lba);
2752 if (ret) {
2753 dump_sector(daddr, scsi_debug_sector_size);
2754 goto out;
2755 }
2756
2757 sector++;
2758 ei_lba++;
2759 dpage_offset += scsi_debug_sector_size;
2760 }
2761 diter.consumed = dpage_offset;
2762 sg_miter_stop(&diter);
2763 }
2764 sg_miter_stop(&piter);
2765
2766 dif_copy_prot(SCpnt, start_sec, sectors, false);
2767 dix_writes++;
2768
2769 return 0;
2770
2771out:
2772 dif_errors++;
2773 sg_miter_stop(&diter);
2774 sg_miter_stop(&piter);
2775 return ret;
2776}
2777
2778static unsigned long lba_to_map_index(sector_t lba)
2779{
2780 if (scsi_debug_unmap_alignment) {
2781 lba += scsi_debug_unmap_granularity -
2782 scsi_debug_unmap_alignment;
2783 }
2784 sector_div(lba, scsi_debug_unmap_granularity);
2785
2786 return lba;
2787}
2788
2789static sector_t map_index_to_lba(unsigned long index)
2790{
2791 sector_t lba = index * scsi_debug_unmap_granularity;
2792
2793 if (scsi_debug_unmap_alignment) {
2794 lba -= scsi_debug_unmap_granularity -
2795 scsi_debug_unmap_alignment;
2796 }
2797
2798 return lba;
2799}
2800
2801static unsigned int map_state(sector_t lba, unsigned int *num)
2802{
2803 sector_t end;
2804 unsigned int mapped;
2805 unsigned long index;
2806 unsigned long next;
2807
2808 index = lba_to_map_index(lba);
2809 mapped = test_bit(index, map_storep);
2810
2811 if (mapped)
2812 next = find_next_zero_bit(map_storep, map_size, index);
2813 else
2814 next = find_next_bit(map_storep, map_size, index);
2815
2816 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
2817 *num = end - lba;
2818
2819 return mapped;
2820}
2821
2822static void map_region(sector_t lba, unsigned int len)
2823{
2824 sector_t end = lba + len;
2825
2826 while (lba < end) {
2827 unsigned long index = lba_to_map_index(lba);
2828
2829 if (index < map_size)
2830 set_bit(index, map_storep);
2831
2832 lba = map_index_to_lba(index + 1);
2833 }
2834}
2835
2836static void unmap_region(sector_t lba, unsigned int len)
2837{
2838 sector_t end = lba + len;
2839
2840 while (lba < end) {
2841 unsigned long index = lba_to_map_index(lba);
2842
2843 if (lba == map_index_to_lba(index) &&
2844 lba + scsi_debug_unmap_granularity <= end &&
2845 index < map_size) {
2846 clear_bit(index, map_storep);
2847 if (scsi_debug_lbprz) {
2848 memset(fake_storep +
2849 lba * scsi_debug_sector_size, 0,
2850 scsi_debug_sector_size *
2851 scsi_debug_unmap_granularity);
2852 }
2853 if (dif_storep) {
2854 memset(dif_storep + lba, 0xff,
2855 sizeof(*dif_storep) *
2856 scsi_debug_unmap_granularity);
2857 }
2858 }
2859 lba = map_index_to_lba(index + 1);
2860 }
2861}
2862
2863static int
2864resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2865{
2866 u8 *cmd = scp->cmnd;
2867 u64 lba;
2868 u32 num;
2869 u32 ei_lba;
2870 unsigned long iflags;
2871 int ret;
2872 bool check_prot;
2873
2874 switch (cmd[0]) {
2875 case WRITE_16:
2876 ei_lba = 0;
2877 lba = get_unaligned_be64(cmd + 2);
2878 num = get_unaligned_be32(cmd + 10);
2879 check_prot = true;
2880 break;
2881 case WRITE_10:
2882 ei_lba = 0;
2883 lba = get_unaligned_be32(cmd + 2);
2884 num = get_unaligned_be16(cmd + 7);
2885 check_prot = true;
2886 break;
2887 case WRITE_6:
2888 ei_lba = 0;
2889 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
2890 (u32)(cmd[1] & 0x1f) << 16;
2891 num = (0 == cmd[4]) ? 256 : cmd[4];
2892 check_prot = true;
2893 break;
2894 case WRITE_12:
2895 ei_lba = 0;
2896 lba = get_unaligned_be32(cmd + 2);
2897 num = get_unaligned_be32(cmd + 6);
2898 check_prot = true;
2899 break;
2900 case 0x53: /* XDWRITEREAD(10) */
2901 ei_lba = 0;
2902 lba = get_unaligned_be32(cmd + 2);
2903 num = get_unaligned_be16(cmd + 7);
2904 check_prot = false;
2905 break;
2906 default: /* assume WRITE(32) */
2907 lba = get_unaligned_be64(cmd + 12);
2908 ei_lba = get_unaligned_be32(cmd + 20);
2909 num = get_unaligned_be32(cmd + 28);
2910 check_prot = false;
2911 break;
2912 }
2913 if (check_prot) {
2914 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
2915 (cmd[1] & 0xe0)) {
2916 mk_sense_invalid_opcode(scp);
2917 return check_condition_result;
2918 }
2919 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
2920 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
2921 (cmd[1] & 0xe0) == 0)
2922 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
2923 "to DIF device\n");
2924 }
2925
2926 /* inline check_device_access_params() */
2927 if (lba + num > sdebug_capacity) {
2928 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2929 return check_condition_result;
2930 }
2931 /* transfer length excessive (tie in to block limits VPD page) */
2932 if (num > sdebug_store_sectors) {
2933 /* needs work to find which cdb byte 'num' comes from */
2934 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2935 return check_condition_result;
2936 }
2937
2938 write_lock_irqsave(&atomic_rw, iflags);
2939
2940 /* DIX + T10 DIF */
2941 if (scsi_debug_dix && scsi_prot_sg_count(scp)) {
2942 int prot_ret = prot_verify_write(scp, lba, num, ei_lba);
2943
2944 if (prot_ret) {
2945 write_unlock_irqrestore(&atomic_rw, iflags);
2946 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, prot_ret);
2947 return illegal_condition_result;
2948 }
2949 }
2950
2951 ret = do_device_access(scp, lba, num, true);
2952 if (scsi_debug_lbp())
2953 map_region(lba, num);
2954 write_unlock_irqrestore(&atomic_rw, iflags);
2955 if (-1 == ret)
2956 return (DID_ERROR << 16);
2957 else if ((ret < (num * scsi_debug_sector_size)) &&
2958 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2959 sdev_printk(KERN_INFO, scp->device,
2960 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
2961 my_name, num * scsi_debug_sector_size, ret);
2962
2963 if (sdebug_any_injecting_opt) {
2964 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
2965
2966 if (ep->inj_recovered) {
2967 mk_sense_buffer(scp, RECOVERED_ERROR,
2968 THRESHOLD_EXCEEDED, 0);
2969 return check_condition_result;
2970 } else if (ep->inj_dif) {
2971 /* Logical block guard check failed */
2972 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
2973 return illegal_condition_result;
2974 } else if (ep->inj_dix) {
2975 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
2976 return illegal_condition_result;
2977 }
2978 }
2979 return 0;
2980}
2981
2982static int
2983resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num, u32 ei_lba,
2984 bool unmap, bool ndob)
2985{
2986 unsigned long iflags;
2987 unsigned long long i;
2988 int ret;
2989
2990 ret = check_device_access_params(scp, lba, num);
2991 if (ret)
2992 return ret;
2993
2994 write_lock_irqsave(&atomic_rw, iflags);
2995
2996 if (unmap && scsi_debug_lbp()) {
2997 unmap_region(lba, num);
2998 goto out;
2999 }
3000
3001 /* if ndob then zero 1 logical block, else fetch 1 logical block */
3002 if (ndob) {
3003 memset(fake_storep + (lba * scsi_debug_sector_size), 0,
3004 scsi_debug_sector_size);
3005 ret = 0;
3006 } else
3007 ret = fetch_to_dev_buffer(scp, fake_storep +
3008 (lba * scsi_debug_sector_size),
3009 scsi_debug_sector_size);
3010
3011 if (-1 == ret) {
3012 write_unlock_irqrestore(&atomic_rw, iflags);
3013 return (DID_ERROR << 16);
3014 } else if ((ret < (num * scsi_debug_sector_size)) &&
3015 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
3016 sdev_printk(KERN_INFO, scp->device,
3017 "%s: %s: cdb indicated=%u, IO sent=%d bytes\n",
3018 my_name, "write same",
3019 num * scsi_debug_sector_size, ret);
3020
3021 /* Copy first sector to remaining blocks */
3022 for (i = 1 ; i < num ; i++)
3023 memcpy(fake_storep + ((lba + i) * scsi_debug_sector_size),
3024 fake_storep + (lba * scsi_debug_sector_size),
3025 scsi_debug_sector_size);
3026
3027 if (scsi_debug_lbp())
3028 map_region(lba, num);
3029out:
3030 write_unlock_irqrestore(&atomic_rw, iflags);
3031
3032 return 0;
3033}
3034
3035static int
3036resp_write_same_10(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3037{
3038 u8 *cmd = scp->cmnd;
3039 u32 lba;
3040 u16 num;
3041 u32 ei_lba = 0;
3042 bool unmap = false;
3043
3044 if (cmd[1] & 0x8) {
3045 if (scsi_debug_lbpws10 == 0) {
3046 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3047 return check_condition_result;
3048 } else
3049 unmap = true;
3050 }
3051 lba = get_unaligned_be32(cmd + 2);
3052 num = get_unaligned_be16(cmd + 7);
3053 if (num > scsi_debug_write_same_length) {
3054 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3055 return check_condition_result;
3056 }
3057 return resp_write_same(scp, lba, num, ei_lba, unmap, false);
3058}
3059
3060static int
3061resp_write_same_16(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3062{
3063 u8 *cmd = scp->cmnd;
3064 u64 lba;
3065 u32 num;
3066 u32 ei_lba = 0;
3067 bool unmap = false;
3068 bool ndob = false;
3069
3070 if (cmd[1] & 0x8) { /* UNMAP */
3071 if (scsi_debug_lbpws == 0) {
3072 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3073 return check_condition_result;
3074 } else
3075 unmap = true;
3076 }
3077 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */
3078 ndob = true;
3079 lba = get_unaligned_be64(cmd + 2);
3080 num = get_unaligned_be32(cmd + 10);
3081 if (num > scsi_debug_write_same_length) {
3082 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
3083 return check_condition_result;
3084 }
3085 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob);
3086}
3087
3088/* Note the mode field is in the same position as the (lower) service action
3089 * field. For the Report supported operation codes command, SPC-4 suggests
3090 * each mode of this command should be reported separately; for future. */
3091static int
3092resp_write_buffer(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3093{
3094 u8 *cmd = scp->cmnd;
3095 struct scsi_device *sdp = scp->device;
3096 struct sdebug_dev_info *dp;
3097 u8 mode;
3098
3099 mode = cmd[1] & 0x1f;
3100 switch (mode) {
3101 case 0x4: /* download microcode (MC) and activate (ACT) */
3102 /* set UAs on this device only */
3103 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3104 set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm);
3105 break;
3106 case 0x5: /* download MC, save and ACT */
3107 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm);
3108 break;
3109 case 0x6: /* download MC with offsets and ACT */
3110 /* set UAs on most devices (LUs) in this target */
3111 list_for_each_entry(dp,
3112 &devip->sdbg_host->dev_info_list,
3113 dev_list)
3114 if (dp->target == sdp->id) {
3115 set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm);
3116 if (devip != dp)
3117 set_bit(SDEBUG_UA_MICROCODE_CHANGED,
3118 dp->uas_bm);
3119 }
3120 break;
3121 case 0x7: /* download MC with offsets, save, and ACT */
3122 /* set UA on all devices (LUs) in this target */
3123 list_for_each_entry(dp,
3124 &devip->sdbg_host->dev_info_list,
3125 dev_list)
3126 if (dp->target == sdp->id)
3127 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET,
3128 dp->uas_bm);
3129 break;
3130 default:
3131 /* do nothing for this command for other mode values */
3132 break;
3133 }
3134 return 0;
3135}
3136
3137static int
3138resp_comp_write(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3139{
3140 u8 *cmd = scp->cmnd;
3141 u8 *arr;
3142 u8 *fake_storep_hold;
3143 u64 lba;
3144 u32 dnum;
3145 u32 lb_size = scsi_debug_sector_size;
3146 u8 num;
3147 unsigned long iflags;
3148 int ret;
3149 int retval = 0;
3150
3151 lba = get_unaligned_be64(cmd + 2);
3152 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */
3153 if (0 == num)
3154 return 0; /* degenerate case, not an error */
3155 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
3156 (cmd[1] & 0xe0)) {
3157 mk_sense_invalid_opcode(scp);
3158 return check_condition_result;
3159 }
3160 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
3161 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
3162 (cmd[1] & 0xe0) == 0)
3163 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3164 "to DIF device\n");
3165
3166 /* inline check_device_access_params() */
3167 if (lba + num > sdebug_capacity) {
3168 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
3169 return check_condition_result;
3170 }
3171 /* transfer length excessive (tie in to block limits VPD page) */
3172 if (num > sdebug_store_sectors) {
3173 /* needs work to find which cdb byte 'num' comes from */
3174 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3175 return check_condition_result;
3176 }
3177 dnum = 2 * num;
3178 arr = kzalloc(dnum * lb_size, GFP_ATOMIC);
3179 if (NULL == arr) {
3180 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3181 INSUFF_RES_ASCQ);
3182 return check_condition_result;
3183 }
3184
3185 write_lock_irqsave(&atomic_rw, iflags);
3186
3187 /* trick do_device_access() to fetch both compare and write buffers
3188 * from data-in into arr. Safe (atomic) since write_lock held. */
3189 fake_storep_hold = fake_storep;
3190 fake_storep = arr;
3191 ret = do_device_access(scp, 0, dnum, true);
3192 fake_storep = fake_storep_hold;
3193 if (ret == -1) {
3194 retval = DID_ERROR << 16;
3195 goto cleanup;
3196 } else if ((ret < (dnum * lb_size)) &&
3197 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
3198 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb "
3199 "indicated=%u, IO sent=%d bytes\n", my_name,
3200 dnum * lb_size, ret);
3201 if (!comp_write_worker(lba, num, arr)) {
3202 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
3203 retval = check_condition_result;
3204 goto cleanup;
3205 }
3206 if (scsi_debug_lbp())
3207 map_region(lba, num);
3208cleanup:
3209 write_unlock_irqrestore(&atomic_rw, iflags);
3210 kfree(arr);
3211 return retval;
3212}
3213
3214struct unmap_block_desc {
3215 __be64 lba;
3216 __be32 blocks;
3217 __be32 __reserved;
3218};
3219
3220static int
3221resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3222{
3223 unsigned char *buf;
3224 struct unmap_block_desc *desc;
3225 unsigned int i, payload_len, descriptors;
3226 int ret;
3227 unsigned long iflags;
3228
3229
3230 if (!scsi_debug_lbp())
3231 return 0; /* fib and say its done */
3232 payload_len = get_unaligned_be16(scp->cmnd + 7);
3233 BUG_ON(scsi_bufflen(scp) != payload_len);
3234
3235 descriptors = (payload_len - 8) / 16;
3236 if (descriptors > scsi_debug_unmap_max_desc) {
3237 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3238 return check_condition_result;
3239 }
3240
3241 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
3242 if (!buf) {
3243 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3244 INSUFF_RES_ASCQ);
3245 return check_condition_result;
3246 }
3247
3248 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
3249
3250 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
3251 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
3252
3253 desc = (void *)&buf[8];
3254
3255 write_lock_irqsave(&atomic_rw, iflags);
3256
3257 for (i = 0 ; i < descriptors ; i++) {
3258 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
3259 unsigned int num = get_unaligned_be32(&desc[i].blocks);
3260
3261 ret = check_device_access_params(scp, lba, num);
3262 if (ret)
3263 goto out;
3264
3265 unmap_region(lba, num);
3266 }
3267
3268 ret = 0;
3269
3270out:
3271 write_unlock_irqrestore(&atomic_rw, iflags);
3272 kfree(buf);
3273
3274 return ret;
3275}
3276
3277#define SDEBUG_GET_LBA_STATUS_LEN 32
3278
3279static int
3280resp_get_lba_status(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3281{
3282 u8 *cmd = scp->cmnd;
3283 u64 lba;
3284 u32 alloc_len, mapped, num;
3285 u8 arr[SDEBUG_GET_LBA_STATUS_LEN];
3286 int ret;
3287
3288 lba = get_unaligned_be64(cmd + 2);
3289 alloc_len = get_unaligned_be32(cmd + 10);
3290
3291 if (alloc_len < 24)
3292 return 0;
3293
3294 ret = check_device_access_params(scp, lba, 1);
3295 if (ret)
3296 return ret;
3297
3298 if (scsi_debug_lbp())
3299 mapped = map_state(lba, &num);
3300 else {
3301 mapped = 1;
3302 /* following just in case virtual_gb changed */
3303 sdebug_capacity = get_sdebug_capacity();
3304 if (sdebug_capacity - lba <= 0xffffffff)
3305 num = sdebug_capacity - lba;
3306 else
3307 num = 0xffffffff;
3308 }
3309
3310 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
3311 put_unaligned_be32(20, arr); /* Parameter Data Length */
3312 put_unaligned_be64(lba, arr + 8); /* LBA */
3313 put_unaligned_be32(num, arr + 16); /* Number of blocks */
3314 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */
3315
3316 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN);
3317}
3318
3319#define SDEBUG_RLUN_ARR_SZ 256
3320
3321static int resp_report_luns(struct scsi_cmnd * scp,
3322 struct sdebug_dev_info * devip)
3323{
3324 unsigned int alloc_len;
3325 int lun_cnt, i, upper, num, n, want_wlun, shortish;
3326 u64 lun;
3327 unsigned char *cmd = scp->cmnd;
3328 int select_report = (int)cmd[2];
3329 struct scsi_lun *one_lun;
3330 unsigned char arr[SDEBUG_RLUN_ARR_SZ];
3331 unsigned char * max_addr;
3332
3333 clear_luns_changed_on_target(devip);
3334 alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
3335 shortish = (alloc_len < 4);
3336 if (shortish || (select_report > 2)) {
3337 mk_sense_invalid_fld(scp, SDEB_IN_CDB, shortish ? 6 : 2, -1);
3338 return check_condition_result;
3339 }
3340 /* can produce response with up to 16k luns (lun 0 to lun 16383) */
3341 memset(arr, 0, SDEBUG_RLUN_ARR_SZ);
3342 lun_cnt = scsi_debug_max_luns;
3343 if (1 == select_report)
3344 lun_cnt = 0;
3345 else if (scsi_debug_no_lun_0 && (lun_cnt > 0))
3346 --lun_cnt;
3347 want_wlun = (select_report > 0) ? 1 : 0;
3348 num = lun_cnt + want_wlun;
3349 arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff;
3350 arr[3] = (sizeof(struct scsi_lun) * num) & 0xff;
3351 n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) /
3352 sizeof(struct scsi_lun)), num);
3353 if (n < num) {
3354 want_wlun = 0;
3355 lun_cnt = n;
3356 }
3357 one_lun = (struct scsi_lun *) &arr[8];
3358 max_addr = arr + SDEBUG_RLUN_ARR_SZ;
3359 for (i = 0, lun = (scsi_debug_no_lun_0 ? 1 : 0);
3360 ((i < lun_cnt) && ((unsigned char *)(one_lun + i) < max_addr));
3361 i++, lun++) {
3362 upper = (lun >> 8) & 0x3f;
3363 if (upper)
3364 one_lun[i].scsi_lun[0] =
3365 (upper | (SAM2_LUN_ADDRESS_METHOD << 6));
3366 one_lun[i].scsi_lun[1] = lun & 0xff;
3367 }
3368 if (want_wlun) {
3369 one_lun[i].scsi_lun[0] = (SCSI_W_LUN_REPORT_LUNS >> 8) & 0xff;
3370 one_lun[i].scsi_lun[1] = SCSI_W_LUN_REPORT_LUNS & 0xff;
3371 i++;
3372 }
3373 alloc_len = (unsigned char *)(one_lun + i) - arr;
3374 return fill_from_dev_buffer(scp, arr,
3375 min((int)alloc_len, SDEBUG_RLUN_ARR_SZ));
3376}
3377
3378static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
3379 unsigned int num, struct sdebug_dev_info *devip)
3380{
3381 int j;
3382 unsigned char *kaddr, *buf;
3383 unsigned int offset;
3384 struct scsi_data_buffer *sdb = scsi_in(scp);
3385 struct sg_mapping_iter miter;
3386
3387 /* better not to use temporary buffer. */
3388 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
3389 if (!buf) {
3390 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3391 INSUFF_RES_ASCQ);
3392 return check_condition_result;
3393 }
3394
3395 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
3396
3397 offset = 0;
3398 sg_miter_start(&miter, sdb->table.sgl, sdb->table.nents,
3399 SG_MITER_ATOMIC | SG_MITER_TO_SG);
3400
3401 while (sg_miter_next(&miter)) {
3402 kaddr = miter.addr;
3403 for (j = 0; j < miter.length; j++)
3404 *(kaddr + j) ^= *(buf + offset + j);
3405
3406 offset += miter.length;
3407 }
3408 sg_miter_stop(&miter);
3409 kfree(buf);
3410
3411 return 0;
3412}
3413
3414static int
3415resp_xdwriteread_10(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3416{
3417 u8 *cmd = scp->cmnd;
3418 u64 lba;
3419 u32 num;
3420 int errsts;
3421
3422 if (!scsi_bidi_cmnd(scp)) {
3423 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3424 INSUFF_RES_ASCQ);
3425 return check_condition_result;
3426 }
3427 errsts = resp_read_dt0(scp, devip);
3428 if (errsts)
3429 return errsts;
3430 if (!(cmd[1] & 0x4)) { /* DISABLE_WRITE is not set */
3431 errsts = resp_write_dt0(scp, devip);
3432 if (errsts)
3433 return errsts;
3434 }
3435 lba = get_unaligned_be32(cmd + 2);
3436 num = get_unaligned_be16(cmd + 7);
3437 return resp_xdwriteread(scp, lba, num, devip);
3438}
3439
3440/* When timer or tasklet goes off this function is called. */
3441static void sdebug_q_cmd_complete(unsigned long indx)
3442{
3443 int qa_indx;
3444 int retiring = 0;
3445 unsigned long iflags;
3446 struct sdebug_queued_cmd *sqcp;
3447 struct scsi_cmnd *scp;
3448 struct sdebug_dev_info *devip;
3449
3450 atomic_inc(&sdebug_completions);
3451 qa_indx = indx;
3452 if ((qa_indx < 0) || (qa_indx >= SCSI_DEBUG_CANQUEUE)) {
3453 pr_err("wild qa_indx=%d\n", qa_indx);
3454 return;
3455 }
3456 spin_lock_irqsave(&queued_arr_lock, iflags);
3457 sqcp = &queued_arr[qa_indx];
3458 scp = sqcp->a_cmnd;
3459 if (NULL == scp) {
3460 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3461 pr_err("scp is NULL\n");
3462 return;
3463 }
3464 devip = (struct sdebug_dev_info *)scp->device->hostdata;
3465 if (devip)
3466 atomic_dec(&devip->num_in_q);
3467 else
3468 pr_err("devip=NULL\n");
3469 if (atomic_read(&retired_max_queue) > 0)
3470 retiring = 1;
3471
3472 sqcp->a_cmnd = NULL;
3473 if (!test_and_clear_bit(qa_indx, queued_in_use_bm)) {
3474 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3475 pr_err("Unexpected completion\n");
3476 return;
3477 }
3478
3479 if (unlikely(retiring)) { /* user has reduced max_queue */
3480 int k, retval;
3481
3482 retval = atomic_read(&retired_max_queue);
3483 if (qa_indx >= retval) {
3484 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3485 pr_err("index %d too large\n", retval);
3486 return;
3487 }
3488 k = find_last_bit(queued_in_use_bm, retval);
3489 if ((k < scsi_debug_max_queue) || (k == retval))
3490 atomic_set(&retired_max_queue, 0);
3491 else
3492 atomic_set(&retired_max_queue, k + 1);
3493 }
3494 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3495 scp->scsi_done(scp); /* callback to mid level */
3496}
3497
3498/* When high resolution timer goes off this function is called. */
3499static enum hrtimer_restart
3500sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
3501{
3502 int qa_indx;
3503 int retiring = 0;
3504 unsigned long iflags;
3505 struct sdebug_hrtimer *sd_hrtp = (struct sdebug_hrtimer *)timer;
3506 struct sdebug_queued_cmd *sqcp;
3507 struct scsi_cmnd *scp;
3508 struct sdebug_dev_info *devip;
3509
3510 atomic_inc(&sdebug_completions);
3511 qa_indx = sd_hrtp->qa_indx;
3512 if ((qa_indx < 0) || (qa_indx >= SCSI_DEBUG_CANQUEUE)) {
3513 pr_err("wild qa_indx=%d\n", qa_indx);
3514 goto the_end;
3515 }
3516 spin_lock_irqsave(&queued_arr_lock, iflags);
3517 sqcp = &queued_arr[qa_indx];
3518 scp = sqcp->a_cmnd;
3519 if (NULL == scp) {
3520 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3521 pr_err("scp is NULL\n");
3522 goto the_end;
3523 }
3524 devip = (struct sdebug_dev_info *)scp->device->hostdata;
3525 if (devip)
3526 atomic_dec(&devip->num_in_q);
3527 else
3528 pr_err("devip=NULL\n");
3529 if (atomic_read(&retired_max_queue) > 0)
3530 retiring = 1;
3531
3532 sqcp->a_cmnd = NULL;
3533 if (!test_and_clear_bit(qa_indx, queued_in_use_bm)) {
3534 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3535 pr_err("Unexpected completion\n");
3536 goto the_end;
3537 }
3538
3539 if (unlikely(retiring)) { /* user has reduced max_queue */
3540 int k, retval;
3541
3542 retval = atomic_read(&retired_max_queue);
3543 if (qa_indx >= retval) {
3544 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3545 pr_err("index %d too large\n", retval);
3546 goto the_end;
3547 }
3548 k = find_last_bit(queued_in_use_bm, retval);
3549 if ((k < scsi_debug_max_queue) || (k == retval))
3550 atomic_set(&retired_max_queue, 0);
3551 else
3552 atomic_set(&retired_max_queue, k + 1);
3553 }
3554 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3555 scp->scsi_done(scp); /* callback to mid level */
3556the_end:
3557 return HRTIMER_NORESTART;
3558}
3559
3560static struct sdebug_dev_info *
3561sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags)
3562{
3563 struct sdebug_dev_info *devip;
3564
3565 devip = kzalloc(sizeof(*devip), flags);
3566 if (devip) {
3567 devip->sdbg_host = sdbg_host;
3568 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
3569 }
3570 return devip;
3571}
3572
3573static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev)
3574{
3575 struct sdebug_host_info * sdbg_host;
3576 struct sdebug_dev_info * open_devip = NULL;
3577 struct sdebug_dev_info * devip =
3578 (struct sdebug_dev_info *)sdev->hostdata;
3579
3580 if (devip)
3581 return devip;
3582 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
3583 if (!sdbg_host) {
3584 pr_err("Host info NULL\n");
3585 return NULL;
3586 }
3587 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
3588 if ((devip->used) && (devip->channel == sdev->channel) &&
3589 (devip->target == sdev->id) &&
3590 (devip->lun == sdev->lun))
3591 return devip;
3592 else {
3593 if ((!devip->used) && (!open_devip))
3594 open_devip = devip;
3595 }
3596 }
3597 if (!open_devip) { /* try and make a new one */
3598 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
3599 if (!open_devip) {
3600 pr_err("out of memory at line %d\n", __LINE__);
3601 return NULL;
3602 }
3603 }
3604
3605 open_devip->channel = sdev->channel;
3606 open_devip->target = sdev->id;
3607 open_devip->lun = sdev->lun;
3608 open_devip->sdbg_host = sdbg_host;
3609 atomic_set(&open_devip->num_in_q, 0);
3610 set_bit(SDEBUG_UA_POR, open_devip->uas_bm);
3611 open_devip->used = true;
3612 return open_devip;
3613}
3614
3615static int scsi_debug_slave_alloc(struct scsi_device *sdp)
3616{
3617 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3618 pr_info("slave_alloc <%u %u %u %llu>\n",
3619 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3620 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue);
3621 return 0;
3622}
3623
3624static int scsi_debug_slave_configure(struct scsi_device *sdp)
3625{
3626 struct sdebug_dev_info *devip;
3627
3628 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3629 pr_info("slave_configure <%u %u %u %llu>\n",
3630 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3631 if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN)
3632 sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN;
3633 devip = devInfoReg(sdp);
3634 if (NULL == devip)
3635 return 1; /* no resources, will be marked offline */
3636 sdp->hostdata = devip;
3637 blk_queue_max_segment_size(sdp->request_queue, -1U);
3638 if (scsi_debug_no_uld)
3639 sdp->no_uld_attach = 1;
3640 return 0;
3641}
3642
3643static void scsi_debug_slave_destroy(struct scsi_device *sdp)
3644{
3645 struct sdebug_dev_info *devip =
3646 (struct sdebug_dev_info *)sdp->hostdata;
3647
3648 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3649 pr_info("slave_destroy <%u %u %u %llu>\n",
3650 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3651 if (devip) {
3652 /* make this slot available for re-use */
3653 devip->used = false;
3654 sdp->hostdata = NULL;
3655 }
3656}
3657
3658/* Returns 1 if cmnd found (deletes its timer or tasklet), else returns 0 */
3659static int stop_queued_cmnd(struct scsi_cmnd *cmnd)
3660{
3661 unsigned long iflags;
3662 int k, qmax, r_qmax;
3663 struct sdebug_queued_cmd *sqcp;
3664 struct sdebug_dev_info *devip;
3665
3666 spin_lock_irqsave(&queued_arr_lock, iflags);
3667 qmax = scsi_debug_max_queue;
3668 r_qmax = atomic_read(&retired_max_queue);
3669 if (r_qmax > qmax)
3670 qmax = r_qmax;
3671 for (k = 0; k < qmax; ++k) {
3672 if (test_bit(k, queued_in_use_bm)) {
3673 sqcp = &queued_arr[k];
3674 if (cmnd == sqcp->a_cmnd) {
3675 devip = (struct sdebug_dev_info *)
3676 cmnd->device->hostdata;
3677 if (devip)
3678 atomic_dec(&devip->num_in_q);
3679 sqcp->a_cmnd = NULL;
3680 spin_unlock_irqrestore(&queued_arr_lock,
3681 iflags);
3682 if (scsi_debug_ndelay > 0) {
3683 if (sqcp->sd_hrtp)
3684 hrtimer_cancel(
3685 &sqcp->sd_hrtp->hrt);
3686 } else if (scsi_debug_delay > 0) {
3687 if (sqcp->cmnd_timerp)
3688 del_timer_sync(
3689 sqcp->cmnd_timerp);
3690 } else if (scsi_debug_delay < 0) {
3691 if (sqcp->tletp)
3692 tasklet_kill(sqcp->tletp);
3693 }
3694 clear_bit(k, queued_in_use_bm);
3695 return 1;
3696 }
3697 }
3698 }
3699 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3700 return 0;
3701}
3702
3703/* Deletes (stops) timers or tasklets of all queued commands */
3704static void stop_all_queued(void)
3705{
3706 unsigned long iflags;
3707 int k;
3708 struct sdebug_queued_cmd *sqcp;
3709 struct sdebug_dev_info *devip;
3710
3711 spin_lock_irqsave(&queued_arr_lock, iflags);
3712 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
3713 if (test_bit(k, queued_in_use_bm)) {
3714 sqcp = &queued_arr[k];
3715 if (sqcp->a_cmnd) {
3716 devip = (struct sdebug_dev_info *)
3717 sqcp->a_cmnd->device->hostdata;
3718 if (devip)
3719 atomic_dec(&devip->num_in_q);
3720 sqcp->a_cmnd = NULL;
3721 spin_unlock_irqrestore(&queued_arr_lock,
3722 iflags);
3723 if (scsi_debug_ndelay > 0) {
3724 if (sqcp->sd_hrtp)
3725 hrtimer_cancel(
3726 &sqcp->sd_hrtp->hrt);
3727 } else if (scsi_debug_delay > 0) {
3728 if (sqcp->cmnd_timerp)
3729 del_timer_sync(
3730 sqcp->cmnd_timerp);
3731 } else if (scsi_debug_delay < 0) {
3732 if (sqcp->tletp)
3733 tasklet_kill(sqcp->tletp);
3734 }
3735 clear_bit(k, queued_in_use_bm);
3736 spin_lock_irqsave(&queued_arr_lock, iflags);
3737 }
3738 }
3739 }
3740 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3741}
3742
3743/* Free queued command memory on heap */
3744static void free_all_queued(void)
3745{
3746 unsigned long iflags;
3747 int k;
3748 struct sdebug_queued_cmd *sqcp;
3749
3750 spin_lock_irqsave(&queued_arr_lock, iflags);
3751 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
3752 sqcp = &queued_arr[k];
3753 kfree(sqcp->cmnd_timerp);
3754 sqcp->cmnd_timerp = NULL;
3755 kfree(sqcp->tletp);
3756 sqcp->tletp = NULL;
3757 kfree(sqcp->sd_hrtp);
3758 sqcp->sd_hrtp = NULL;
3759 }
3760 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3761}
3762
3763static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
3764{
3765 ++num_aborts;
3766 if (SCpnt) {
3767 if (SCpnt->device &&
3768 (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts))
3769 sdev_printk(KERN_INFO, SCpnt->device, "%s\n",
3770 __func__);
3771 stop_queued_cmnd(SCpnt);
3772 }
3773 return SUCCESS;
3774}
3775
3776static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
3777{
3778 struct sdebug_dev_info * devip;
3779
3780 ++num_dev_resets;
3781 if (SCpnt && SCpnt->device) {
3782 struct scsi_device *sdp = SCpnt->device;
3783
3784 if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
3785 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3786 devip = devInfoReg(sdp);
3787 if (devip)
3788 set_bit(SDEBUG_UA_POR, devip->uas_bm);
3789 }
3790 return SUCCESS;
3791}
3792
3793static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
3794{
3795 struct sdebug_host_info *sdbg_host;
3796 struct sdebug_dev_info *devip;
3797 struct scsi_device *sdp;
3798 struct Scsi_Host *hp;
3799 int k = 0;
3800
3801 ++num_target_resets;
3802 if (!SCpnt)
3803 goto lie;
3804 sdp = SCpnt->device;
3805 if (!sdp)
3806 goto lie;
3807 if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
3808 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3809 hp = sdp->host;
3810 if (!hp)
3811 goto lie;
3812 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
3813 if (sdbg_host) {
3814 list_for_each_entry(devip,
3815 &sdbg_host->dev_info_list,
3816 dev_list)
3817 if (devip->target == sdp->id) {
3818 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3819 ++k;
3820 }
3821 }
3822 if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
3823 sdev_printk(KERN_INFO, sdp,
3824 "%s: %d device(s) found in target\n", __func__, k);
3825lie:
3826 return SUCCESS;
3827}
3828
3829static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
3830{
3831 struct sdebug_host_info *sdbg_host;
3832 struct sdebug_dev_info *devip;
3833 struct scsi_device * sdp;
3834 struct Scsi_Host * hp;
3835 int k = 0;
3836
3837 ++num_bus_resets;
3838 if (!(SCpnt && SCpnt->device))
3839 goto lie;
3840 sdp = SCpnt->device;
3841 if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
3842 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3843 hp = sdp->host;
3844 if (hp) {
3845 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
3846 if (sdbg_host) {
3847 list_for_each_entry(devip,
3848 &sdbg_host->dev_info_list,
3849 dev_list) {
3850 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3851 ++k;
3852 }
3853 }
3854 }
3855 if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
3856 sdev_printk(KERN_INFO, sdp,
3857 "%s: %d device(s) found in host\n", __func__, k);
3858lie:
3859 return SUCCESS;
3860}
3861
3862static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
3863{
3864 struct sdebug_host_info * sdbg_host;
3865 struct sdebug_dev_info *devip;
3866 int k = 0;
3867
3868 ++num_host_resets;
3869 if ((SCpnt->device) && (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts))
3870 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
3871 spin_lock(&sdebug_host_list_lock);
3872 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
3873 list_for_each_entry(devip, &sdbg_host->dev_info_list,
3874 dev_list) {
3875 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3876 ++k;
3877 }
3878 }
3879 spin_unlock(&sdebug_host_list_lock);
3880 stop_all_queued();
3881 if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
3882 sdev_printk(KERN_INFO, SCpnt->device,
3883 "%s: %d device(s) found\n", __func__, k);
3884 return SUCCESS;
3885}
3886
3887static void __init sdebug_build_parts(unsigned char *ramp,
3888 unsigned long store_size)
3889{
3890 struct partition * pp;
3891 int starts[SDEBUG_MAX_PARTS + 2];
3892 int sectors_per_part, num_sectors, k;
3893 int heads_by_sects, start_sec, end_sec;
3894
3895 /* assume partition table already zeroed */
3896 if ((scsi_debug_num_parts < 1) || (store_size < 1048576))
3897 return;
3898 if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) {
3899 scsi_debug_num_parts = SDEBUG_MAX_PARTS;
3900 pr_warn("reducing partitions to %d\n", SDEBUG_MAX_PARTS);
3901 }
3902 num_sectors = (int)sdebug_store_sectors;
3903 sectors_per_part = (num_sectors - sdebug_sectors_per)
3904 / scsi_debug_num_parts;
3905 heads_by_sects = sdebug_heads * sdebug_sectors_per;
3906 starts[0] = sdebug_sectors_per;
3907 for (k = 1; k < scsi_debug_num_parts; ++k)
3908 starts[k] = ((k * sectors_per_part) / heads_by_sects)
3909 * heads_by_sects;
3910 starts[scsi_debug_num_parts] = num_sectors;
3911 starts[scsi_debug_num_parts + 1] = 0;
3912
3913 ramp[510] = 0x55; /* magic partition markings */
3914 ramp[511] = 0xAA;
3915 pp = (struct partition *)(ramp + 0x1be);
3916 for (k = 0; starts[k + 1]; ++k, ++pp) {
3917 start_sec = starts[k];
3918 end_sec = starts[k + 1] - 1;
3919 pp->boot_ind = 0;
3920
3921 pp->cyl = start_sec / heads_by_sects;
3922 pp->head = (start_sec - (pp->cyl * heads_by_sects))
3923 / sdebug_sectors_per;
3924 pp->sector = (start_sec % sdebug_sectors_per) + 1;
3925
3926 pp->end_cyl = end_sec / heads_by_sects;
3927 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
3928 / sdebug_sectors_per;
3929 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
3930
3931 pp->start_sect = cpu_to_le32(start_sec);
3932 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
3933 pp->sys_ind = 0x83; /* plain Linux partition */
3934 }
3935}
3936
3937static int
3938schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
3939 int scsi_result, int delta_jiff)
3940{
3941 unsigned long iflags;
3942 int k, num_in_q, qdepth, inject;
3943 struct sdebug_queued_cmd *sqcp = NULL;
3944 struct scsi_device *sdp;
3945
3946 /* this should never happen */
3947 if (WARN_ON(!cmnd))
3948 return SCSI_MLQUEUE_HOST_BUSY;
3949
3950 if (NULL == devip) {
3951 pr_warn("called devip == NULL\n");
3952 /* no particularly good error to report back */
3953 return SCSI_MLQUEUE_HOST_BUSY;
3954 }
3955
3956 sdp = cmnd->device;
3957
3958 if ((scsi_result) && (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
3959 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
3960 __func__, scsi_result);
3961 if (delta_jiff == 0)
3962 goto respond_in_thread;
3963
3964 /* schedule the response at a later time if resources permit */
3965 spin_lock_irqsave(&queued_arr_lock, iflags);
3966 num_in_q = atomic_read(&devip->num_in_q);
3967 qdepth = cmnd->device->queue_depth;
3968 inject = 0;
3969 if ((qdepth > 0) && (num_in_q >= qdepth)) {
3970 if (scsi_result) {
3971 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3972 goto respond_in_thread;
3973 } else
3974 scsi_result = device_qfull_result;
3975 } else if ((scsi_debug_every_nth != 0) &&
3976 (SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts) &&
3977 (scsi_result == 0)) {
3978 if ((num_in_q == (qdepth - 1)) &&
3979 (atomic_inc_return(&sdebug_a_tsf) >=
3980 abs(scsi_debug_every_nth))) {
3981 atomic_set(&sdebug_a_tsf, 0);
3982 inject = 1;
3983 scsi_result = device_qfull_result;
3984 }
3985 }
3986
3987 k = find_first_zero_bit(queued_in_use_bm, scsi_debug_max_queue);
3988 if (k >= scsi_debug_max_queue) {
3989 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3990 if (scsi_result)
3991 goto respond_in_thread;
3992 else if (SCSI_DEBUG_OPT_ALL_TSF & scsi_debug_opts)
3993 scsi_result = device_qfull_result;
3994 if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts)
3995 sdev_printk(KERN_INFO, sdp,
3996 "%s: max_queue=%d exceeded, %s\n",
3997 __func__, scsi_debug_max_queue,
3998 (scsi_result ? "status: TASK SET FULL" :
3999 "report: host busy"));
4000 if (scsi_result)
4001 goto respond_in_thread;
4002 else
4003 return SCSI_MLQUEUE_HOST_BUSY;
4004 }
4005 __set_bit(k, queued_in_use_bm);
4006 atomic_inc(&devip->num_in_q);
4007 sqcp = &queued_arr[k];
4008 sqcp->a_cmnd = cmnd;
4009 cmnd->result = scsi_result;
4010 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4011 if (delta_jiff > 0) {
4012 if (NULL == sqcp->cmnd_timerp) {
4013 sqcp->cmnd_timerp = kmalloc(sizeof(struct timer_list),
4014 GFP_ATOMIC);
4015 if (NULL == sqcp->cmnd_timerp)
4016 return SCSI_MLQUEUE_HOST_BUSY;
4017 init_timer(sqcp->cmnd_timerp);
4018 }
4019 sqcp->cmnd_timerp->function = sdebug_q_cmd_complete;
4020 sqcp->cmnd_timerp->data = k;
4021 sqcp->cmnd_timerp->expires = get_jiffies_64() + delta_jiff;
4022 add_timer(sqcp->cmnd_timerp);
4023 } else if (scsi_debug_ndelay > 0) {
4024 ktime_t kt = ktime_set(0, scsi_debug_ndelay);
4025 struct sdebug_hrtimer *sd_hp = sqcp->sd_hrtp;
4026
4027 if (NULL == sd_hp) {
4028 sd_hp = kmalloc(sizeof(*sd_hp), GFP_ATOMIC);
4029 if (NULL == sd_hp)
4030 return SCSI_MLQUEUE_HOST_BUSY;
4031 sqcp->sd_hrtp = sd_hp;
4032 hrtimer_init(&sd_hp->hrt, CLOCK_MONOTONIC,
4033 HRTIMER_MODE_REL);
4034 sd_hp->hrt.function = sdebug_q_cmd_hrt_complete;
4035 sd_hp->qa_indx = k;
4036 }
4037 hrtimer_start(&sd_hp->hrt, kt, HRTIMER_MODE_REL);
4038 } else { /* delay < 0 */
4039 if (NULL == sqcp->tletp) {
4040 sqcp->tletp = kmalloc(sizeof(*sqcp->tletp),
4041 GFP_ATOMIC);
4042 if (NULL == sqcp->tletp)
4043 return SCSI_MLQUEUE_HOST_BUSY;
4044 tasklet_init(sqcp->tletp,
4045 sdebug_q_cmd_complete, k);
4046 }
4047 if (-1 == delta_jiff)
4048 tasklet_hi_schedule(sqcp->tletp);
4049 else
4050 tasklet_schedule(sqcp->tletp);
4051 }
4052 if ((SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) &&
4053 (scsi_result == device_qfull_result))
4054 sdev_printk(KERN_INFO, sdp,
4055 "%s: num_in_q=%d +1, %s%s\n", __func__,
4056 num_in_q, (inject ? "<inject> " : ""),
4057 "status: TASK SET FULL");
4058 return 0;
4059
4060respond_in_thread: /* call back to mid-layer using invocation thread */
4061 cmnd->result = scsi_result;
4062 cmnd->scsi_done(cmnd);
4063 return 0;
4064}
4065
4066/* Note: The following macros create attribute files in the
4067 /sys/module/scsi_debug/parameters directory. Unfortunately this
4068 driver is unaware of a change and cannot trigger auxiliary actions
4069 as it can when the corresponding attribute in the
4070 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
4071 */
4072module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR);
4073module_param_named(ato, scsi_debug_ato, int, S_IRUGO);
4074module_param_named(clustering, scsi_debug_clustering, bool, S_IRUGO | S_IWUSR);
4075module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR);
4076module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO);
4077module_param_named(dif, scsi_debug_dif, int, S_IRUGO);
4078module_param_named(dix, scsi_debug_dix, int, S_IRUGO);
4079module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR);
4080module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR);
4081module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR);
4082module_param_named(guard, scsi_debug_guard, uint, S_IRUGO);
4083module_param_named(host_lock, scsi_debug_host_lock, bool, S_IRUGO | S_IWUSR);
4084module_param_named(lbpu, scsi_debug_lbpu, int, S_IRUGO);
4085module_param_named(lbpws, scsi_debug_lbpws, int, S_IRUGO);
4086module_param_named(lbpws10, scsi_debug_lbpws10, int, S_IRUGO);
4087module_param_named(lbprz, scsi_debug_lbprz, int, S_IRUGO);
4088module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO);
4089module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR);
4090module_param_named(max_queue, scsi_debug_max_queue, int, S_IRUGO | S_IWUSR);
4091module_param_named(ndelay, scsi_debug_ndelay, int, S_IRUGO | S_IWUSR);
4092module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR);
4093module_param_named(no_uld, scsi_debug_no_uld, int, S_IRUGO);
4094module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO);
4095module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR);
4096module_param_named(opt_blks, scsi_debug_opt_blks, int, S_IRUGO);
4097module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR);
4098module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO);
4099module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR);
4100module_param_named(removable, scsi_debug_removable, bool, S_IRUGO | S_IWUSR);
4101module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO);
4102module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO);
4103module_param_named(strict, scsi_debug_strict, bool, S_IRUGO | S_IWUSR);
4104module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO);
4105module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO);
4106module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO);
4107module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, int, S_IRUGO);
4108module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR);
4109module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int,
4110 S_IRUGO | S_IWUSR);
4111module_param_named(write_same_length, scsi_debug_write_same_length, int,
4112 S_IRUGO | S_IWUSR);
4113
4114MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
4115MODULE_DESCRIPTION("SCSI debug adapter driver");
4116MODULE_LICENSE("GPL");
4117MODULE_VERSION(SCSI_DEBUG_VERSION);
4118
4119MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
4120MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
4121MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
4122MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
4123MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)");
4124MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
4125MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
4126MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
4127MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
4128MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
4129MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
4130MODULE_PARM_DESC(host_lock, "use host_lock around all commands (def=0)");
4131MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
4132MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
4133MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
4134MODULE_PARM_DESC(lbprz, "unmapped blocks return 0 on read (def=1)");
4135MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
4136MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
4137MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
4138MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
4139MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
4140MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
4141MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
4142MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
4143MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)");
4144MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
4145MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
4146MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
4147MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
4148MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=6[SPC-4])");
4149MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
4150MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)");
4151MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
4152MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
4153MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
4154MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
4155MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)");
4156MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
4157MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
4158
4159static char sdebug_info[256];
4160
4161static const char * scsi_debug_info(struct Scsi_Host * shp)
4162{
4163 sprintf(sdebug_info, "scsi_debug, version %s [%s], "
4164 "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION,
4165 scsi_debug_version_date, scsi_debug_dev_size_mb,
4166 scsi_debug_opts);
4167 return sdebug_info;
4168}
4169
4170/* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */
4171static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer, int length)
4172{
4173 char arr[16];
4174 int opts;
4175 int minLen = length > 15 ? 15 : length;
4176
4177 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
4178 return -EACCES;
4179 memcpy(arr, buffer, minLen);
4180 arr[minLen] = '\0';
4181 if (1 != sscanf(arr, "%d", &opts))
4182 return -EINVAL;
4183 scsi_debug_opts = opts;
4184 if (scsi_debug_every_nth != 0)
4185 atomic_set(&sdebug_cmnd_count, 0);
4186 return length;
4187}
4188
4189/* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the
4190 * same for each scsi_debug host (if more than one). Some of the counters
4191 * output are not atomics so might be inaccurate in a busy system. */
4192static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
4193{
4194 int f, l;
4195 char b[32];
4196
4197 if (scsi_debug_every_nth > 0)
4198 snprintf(b, sizeof(b), " (curr:%d)",
4199 ((SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts) ?
4200 atomic_read(&sdebug_a_tsf) :
4201 atomic_read(&sdebug_cmnd_count)));
4202 else
4203 b[0] = '\0';
4204
4205 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n"
4206 "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, "
4207 "every_nth=%d%s\n"
4208 "delay=%d, ndelay=%d, max_luns=%d, q_completions=%d\n"
4209 "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n"
4210 "command aborts=%d; RESETs: device=%d, target=%d, bus=%d, "
4211 "host=%d\ndix_reads=%d dix_writes=%d dif_errors=%d "
4212 "usec_in_jiffy=%lu\n",
4213 SCSI_DEBUG_VERSION, scsi_debug_version_date,
4214 scsi_debug_num_tgts, scsi_debug_dev_size_mb, scsi_debug_opts,
4215 scsi_debug_every_nth, b, scsi_debug_delay, scsi_debug_ndelay,
4216 scsi_debug_max_luns, atomic_read(&sdebug_completions),
4217 scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads,
4218 sdebug_sectors_per, num_aborts, num_dev_resets,
4219 num_target_resets, num_bus_resets, num_host_resets,
4220 dix_reads, dix_writes, dif_errors, TICK_NSEC / 1000);
4221
4222 f = find_first_bit(queued_in_use_bm, scsi_debug_max_queue);
4223 if (f != scsi_debug_max_queue) {
4224 l = find_last_bit(queued_in_use_bm, scsi_debug_max_queue);
4225 seq_printf(m, " %s BUSY: first,last bits set: %d,%d\n",
4226 "queued_in_use_bm", f, l);
4227 }
4228 return 0;
4229}
4230
4231static ssize_t delay_show(struct device_driver *ddp, char *buf)
4232{
4233 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay);
4234}
4235/* Returns -EBUSY if delay is being changed and commands are queued */
4236static ssize_t delay_store(struct device_driver *ddp, const char *buf,
4237 size_t count)
4238{
4239 int delay, res;
4240
4241 if ((count > 0) && (1 == sscanf(buf, "%d", &delay))) {
4242 res = count;
4243 if (scsi_debug_delay != delay) {
4244 unsigned long iflags;
4245 int k;
4246
4247 spin_lock_irqsave(&queued_arr_lock, iflags);
4248 k = find_first_bit(queued_in_use_bm,
4249 scsi_debug_max_queue);
4250 if (k != scsi_debug_max_queue)
4251 res = -EBUSY; /* have queued commands */
4252 else {
4253 scsi_debug_delay = delay;
4254 scsi_debug_ndelay = 0;
4255 }
4256 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4257 }
4258 return res;
4259 }
4260 return -EINVAL;
4261}
4262static DRIVER_ATTR_RW(delay);
4263
4264static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
4265{
4266 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ndelay);
4267}
4268/* Returns -EBUSY if ndelay is being changed and commands are queued */
4269/* If > 0 and accepted then scsi_debug_delay is set to DELAY_OVERRIDDEN */
4270static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
4271 size_t count)
4272{
4273 unsigned long iflags;
4274 int ndelay, res, k;
4275
4276 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
4277 (ndelay >= 0) && (ndelay < 1000000000)) {
4278 res = count;
4279 if (scsi_debug_ndelay != ndelay) {
4280 spin_lock_irqsave(&queued_arr_lock, iflags);
4281 k = find_first_bit(queued_in_use_bm,
4282 scsi_debug_max_queue);
4283 if (k != scsi_debug_max_queue)
4284 res = -EBUSY; /* have queued commands */
4285 else {
4286 scsi_debug_ndelay = ndelay;
4287 scsi_debug_delay = ndelay ? DELAY_OVERRIDDEN
4288 : DEF_DELAY;
4289 }
4290 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4291 }
4292 return res;
4293 }
4294 return -EINVAL;
4295}
4296static DRIVER_ATTR_RW(ndelay);
4297
4298static ssize_t opts_show(struct device_driver *ddp, char *buf)
4299{
4300 return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts);
4301}
4302
4303static ssize_t opts_store(struct device_driver *ddp, const char *buf,
4304 size_t count)
4305{
4306 int opts;
4307 char work[20];
4308
4309 if (1 == sscanf(buf, "%10s", work)) {
4310 if (0 == strncasecmp(work,"0x", 2)) {
4311 if (1 == sscanf(&work[2], "%x", &opts))
4312 goto opts_done;
4313 } else {
4314 if (1 == sscanf(work, "%d", &opts))
4315 goto opts_done;
4316 }
4317 }
4318 return -EINVAL;
4319opts_done:
4320 scsi_debug_opts = opts;
4321 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
4322 sdebug_any_injecting_opt = true;
4323 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
4324 sdebug_any_injecting_opt = true;
4325 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
4326 sdebug_any_injecting_opt = true;
4327 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
4328 sdebug_any_injecting_opt = true;
4329 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
4330 sdebug_any_injecting_opt = true;
4331 atomic_set(&sdebug_cmnd_count, 0);
4332 atomic_set(&sdebug_a_tsf, 0);
4333 return count;
4334}
4335static DRIVER_ATTR_RW(opts);
4336
4337static ssize_t ptype_show(struct device_driver *ddp, char *buf)
4338{
4339 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype);
4340}
4341static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
4342 size_t count)
4343{
4344 int n;
4345
4346 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4347 scsi_debug_ptype = n;
4348 return count;
4349 }
4350 return -EINVAL;
4351}
4352static DRIVER_ATTR_RW(ptype);
4353
4354static ssize_t dsense_show(struct device_driver *ddp, char *buf)
4355{
4356 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense);
4357}
4358static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
4359 size_t count)
4360{
4361 int n;
4362
4363 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4364 scsi_debug_dsense = n;
4365 return count;
4366 }
4367 return -EINVAL;
4368}
4369static DRIVER_ATTR_RW(dsense);
4370
4371static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
4372{
4373 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw);
4374}
4375static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
4376 size_t count)
4377{
4378 int n;
4379
4380 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4381 n = (n > 0);
4382 scsi_debug_fake_rw = (scsi_debug_fake_rw > 0);
4383 if (scsi_debug_fake_rw != n) {
4384 if ((0 == n) && (NULL == fake_storep)) {
4385 unsigned long sz =
4386 (unsigned long)scsi_debug_dev_size_mb *
4387 1048576;
4388
4389 fake_storep = vmalloc(sz);
4390 if (NULL == fake_storep) {
4391 pr_err("out of memory, 9\n");
4392 return -ENOMEM;
4393 }
4394 memset(fake_storep, 0, sz);
4395 }
4396 scsi_debug_fake_rw = n;
4397 }
4398 return count;
4399 }
4400 return -EINVAL;
4401}
4402static DRIVER_ATTR_RW(fake_rw);
4403
4404static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
4405{
4406 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0);
4407}
4408static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
4409 size_t count)
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}
4419static DRIVER_ATTR_RW(no_lun_0);
4420
4421static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
4422{
4423 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts);
4424}
4425static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
4426 size_t count)
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}
4437static DRIVER_ATTR_RW(num_tgts);
4438
4439static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
4440{
4441 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb);
4442}
4443static DRIVER_ATTR_RO(dev_size_mb);
4444
4445static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
4446{
4447 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts);
4448}
4449static DRIVER_ATTR_RO(num_parts);
4450
4451static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
4452{
4453 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth);
4454}
4455static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
4456 size_t count)
4457{
4458 int nth;
4459
4460 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
4461 scsi_debug_every_nth = nth;
4462 atomic_set(&sdebug_cmnd_count, 0);
4463 return count;
4464 }
4465 return -EINVAL;
4466}
4467static DRIVER_ATTR_RW(every_nth);
4468
4469static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
4470{
4471 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns);
4472}
4473static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
4474 size_t count)
4475{
4476 int n;
4477 bool changed;
4478
4479 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4480 changed = (scsi_debug_max_luns != n);
4481 scsi_debug_max_luns = n;
4482 sdebug_max_tgts_luns();
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 }
4498 return count;
4499 }
4500 return -EINVAL;
4501}
4502static DRIVER_ATTR_RW(max_luns);
4503
4504static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
4505{
4506 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_queue);
4507}
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. */
4510static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
4511 size_t count)
4512{
4513 unsigned long iflags;
4514 int n, k;
4515
4516 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
4517 (n <= SCSI_DEBUG_CANQUEUE)) {
4518 spin_lock_irqsave(&queued_arr_lock, iflags);
4519 k = find_last_bit(queued_in_use_bm, SCSI_DEBUG_CANQUEUE);
4520 scsi_debug_max_queue = n;
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);
4528 return count;
4529 }
4530 return -EINVAL;
4531}
4532static DRIVER_ATTR_RW(max_queue);
4533
4534static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
4535{
4536 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_uld);
4537}
4538static DRIVER_ATTR_RO(no_uld);
4539
4540static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
4541{
4542 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level);
4543}
4544static DRIVER_ATTR_RO(scsi_level);
4545
4546static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
4547{
4548 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb);
4549}
4550static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
4551 size_t count)
4552{
4553 int n;
4554 bool changed;
4555
4556 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4557 changed = (scsi_debug_virtual_gb != n);
4558 scsi_debug_virtual_gb = n;
4559 sdebug_capacity = get_sdebug_capacity();
4560 if (changed) {
4561 struct sdebug_host_info *sdhp;
4562 struct sdebug_dev_info *dp;
4563
4564 spin_lock(&sdebug_host_list_lock);
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 }
4573 spin_unlock(&sdebug_host_list_lock);
4574 }
4575 return count;
4576 }
4577 return -EINVAL;
4578}
4579static DRIVER_ATTR_RW(virtual_gb);
4580
4581static ssize_t add_host_show(struct device_driver *ddp, char *buf)
4582{
4583 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host);
4584}
4585
4586static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
4587 size_t count)
4588{
4589 int delta_hosts;
4590
4591 if (sscanf(buf, "%d", &delta_hosts) != 1)
4592 return -EINVAL;
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}
4604static DRIVER_ATTR_RW(add_host);
4605
4606static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
4607{
4608 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_vpd_use_hostno);
4609}
4610static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
4611 size_t count)
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}
4621static DRIVER_ATTR_RW(vpd_use_hostno);
4622
4623static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
4624{
4625 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size);
4626}
4627static DRIVER_ATTR_RO(sector_size);
4628
4629static ssize_t dix_show(struct device_driver *ddp, char *buf)
4630{
4631 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix);
4632}
4633static DRIVER_ATTR_RO(dix);
4634
4635static ssize_t dif_show(struct device_driver *ddp, char *buf)
4636{
4637 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif);
4638}
4639static DRIVER_ATTR_RO(dif);
4640
4641static ssize_t guard_show(struct device_driver *ddp, char *buf)
4642{
4643 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_guard);
4644}
4645static DRIVER_ATTR_RO(guard);
4646
4647static ssize_t ato_show(struct device_driver *ddp, char *buf)
4648{
4649 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato);
4650}
4651static DRIVER_ATTR_RO(ato);
4652
4653static ssize_t map_show(struct device_driver *ddp, char *buf)
4654{
4655 ssize_t count;
4656
4657 if (!scsi_debug_lbp())
4658 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
4659 sdebug_store_sectors);
4660
4661 count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
4662 (int)map_size, map_storep);
4663 buf[count++] = '\n';
4664 buf[count] = '\0';
4665
4666 return count;
4667}
4668static DRIVER_ATTR_RO(map);
4669
4670static ssize_t removable_show(struct device_driver *ddp, char *buf)
4671{
4672 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_removable ? 1 : 0);
4673}
4674static ssize_t removable_store(struct device_driver *ddp, const char *buf,
4675 size_t count)
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}
4685static DRIVER_ATTR_RW(removable);
4686
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
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
4737
4738/* Note: The following array creates attribute files in the
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 */
4744
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,
4770 &driver_attr_host_lock.attr,
4771 &driver_attr_ndelay.attr,
4772 &driver_attr_strict.attr,
4773 NULL,
4774};
4775ATTRIBUTE_GROUPS(sdebug_drv);
4776
4777static struct device *pseudo_primary;
4778
4779static int __init scsi_debug_init(void)
4780{
4781 unsigned long sz;
4782 int host_to_add;
4783 int k;
4784 int ret;
4785
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("ndelay must be less than 1 second, ignored\n");
4792 scsi_debug_ndelay = 0;
4793 } else if (scsi_debug_ndelay > 0)
4794 scsi_debug_delay = DELAY_OVERRIDDEN;
4795
4796 switch (scsi_debug_sector_size) {
4797 case 512:
4798 case 1024:
4799 case 2048:
4800 case 4096:
4801 break;
4802 default:
4803 pr_err("invalid sector_size %d\n", scsi_debug_sector_size);
4804 return -EINVAL;
4805 }
4806
4807 switch (scsi_debug_dif) {
4808
4809 case SD_DIF_TYPE0_PROTECTION:
4810 case SD_DIF_TYPE1_PROTECTION:
4811 case SD_DIF_TYPE2_PROTECTION:
4812 case SD_DIF_TYPE3_PROTECTION:
4813 break;
4814
4815 default:
4816 pr_err("dif must be 0, 1, 2 or 3\n");
4817 return -EINVAL;
4818 }
4819
4820 if (scsi_debug_guard > 1) {
4821 pr_err("guard must be 0 or 1\n");
4822 return -EINVAL;
4823 }
4824
4825 if (scsi_debug_ato > 1) {
4826 pr_err("ato must be 0 or 1\n");
4827 return -EINVAL;
4828 }
4829
4830 if (scsi_debug_physblk_exp > 15) {
4831 pr_err("invalid physblk_exp %u\n", scsi_debug_physblk_exp);
4832 return -EINVAL;
4833 }
4834
4835 if (scsi_debug_lowest_aligned > 0x3fff) {
4836 pr_err("lowest_aligned too big: %u\n",
4837 scsi_debug_lowest_aligned);
4838 return -EINVAL;
4839 }
4840
4841 if (scsi_debug_dev_size_mb < 1)
4842 scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
4843 sz = (unsigned long)scsi_debug_dev_size_mb * 1048576;
4844 sdebug_store_sectors = sz / scsi_debug_sector_size;
4845 sdebug_capacity = get_sdebug_capacity();
4846
4847 /* play around with geometry, don't waste too much on track 0 */
4848 sdebug_heads = 8;
4849 sdebug_sectors_per = 32;
4850 if (scsi_debug_dev_size_mb >= 256)
4851 sdebug_heads = 64;
4852 else if (scsi_debug_dev_size_mb >= 16)
4853 sdebug_heads = 32;
4854 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
4855 (sdebug_sectors_per * sdebug_heads);
4856 if (sdebug_cylinders_per >= 1024) {
4857 /* other LLDs do this; implies >= 1GB ram disk ... */
4858 sdebug_heads = 255;
4859 sdebug_sectors_per = 63;
4860 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
4861 (sdebug_sectors_per * sdebug_heads);
4862 }
4863
4864 if (0 == scsi_debug_fake_rw) {
4865 fake_storep = vmalloc(sz);
4866 if (NULL == fake_storep) {
4867 pr_err("out of memory, 1\n");
4868 return -ENOMEM;
4869 }
4870 memset(fake_storep, 0, sz);
4871 if (scsi_debug_num_parts > 0)
4872 sdebug_build_parts(fake_storep, sz);
4873 }
4874
4875 if (scsi_debug_dix) {
4876 int dif_size;
4877
4878 dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple);
4879 dif_storep = vmalloc(dif_size);
4880
4881 pr_err("dif_storep %u bytes @ %p\n", dif_size, dif_storep);
4882
4883 if (dif_storep == NULL) {
4884 pr_err("out of mem. (DIX)\n");
4885 ret = -ENOMEM;
4886 goto free_vm;
4887 }
4888
4889 memset(dif_storep, 0xff, dif_size);
4890 }
4891
4892 /* Logical Block Provisioning */
4893 if (scsi_debug_lbp()) {
4894 scsi_debug_unmap_max_blocks =
4895 clamp(scsi_debug_unmap_max_blocks, 0U, 0xffffffffU);
4896
4897 scsi_debug_unmap_max_desc =
4898 clamp(scsi_debug_unmap_max_desc, 0U, 256U);
4899
4900 scsi_debug_unmap_granularity =
4901 clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU);
4902
4903 if (scsi_debug_unmap_alignment &&
4904 scsi_debug_unmap_granularity <=
4905 scsi_debug_unmap_alignment) {
4906 pr_err("ERR: unmap_granularity <= unmap_alignment\n");
4907 return -EINVAL;
4908 }
4909
4910 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
4911 map_storep = vmalloc(BITS_TO_LONGS(map_size) * sizeof(long));
4912
4913 pr_info("%lu provisioning blocks\n", map_size);
4914
4915 if (map_storep == NULL) {
4916 pr_err("out of mem. (MAP)\n");
4917 ret = -ENOMEM;
4918 goto free_vm;
4919 }
4920
4921 bitmap_zero(map_storep, map_size);
4922
4923 /* Map first 1KB for partition table */
4924 if (scsi_debug_num_parts)
4925 map_region(0, 2);
4926 }
4927
4928 pseudo_primary = root_device_register("pseudo_0");
4929 if (IS_ERR(pseudo_primary)) {
4930 pr_warn("root_device_register() error\n");
4931 ret = PTR_ERR(pseudo_primary);
4932 goto free_vm;
4933 }
4934 ret = bus_register(&pseudo_lld_bus);
4935 if (ret < 0) {
4936 pr_warn("bus_register error: %d\n", ret);
4937 goto dev_unreg;
4938 }
4939 ret = driver_register(&sdebug_driverfs_driver);
4940 if (ret < 0) {
4941 pr_warn("driver_register error: %d\n", ret);
4942 goto bus_unreg;
4943 }
4944
4945 host_to_add = scsi_debug_add_host;
4946 scsi_debug_add_host = 0;
4947
4948 for (k = 0; k < host_to_add; k++) {
4949 if (sdebug_add_adapter()) {
4950 pr_err("sdebug_add_adapter failed k=%d\n", k);
4951 break;
4952 }
4953 }
4954
4955 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
4956 pr_info("built %d host(s)\n", scsi_debug_add_host);
4957
4958 return 0;
4959
4960bus_unreg:
4961 bus_unregister(&pseudo_lld_bus);
4962dev_unreg:
4963 root_device_unregister(pseudo_primary);
4964free_vm:
4965 vfree(map_storep);
4966 vfree(dif_storep);
4967 vfree(fake_storep);
4968
4969 return ret;
4970}
4971
4972static void __exit scsi_debug_exit(void)
4973{
4974 int k = scsi_debug_add_host;
4975
4976 stop_all_queued();
4977 free_all_queued();
4978 for (; k; k--)
4979 sdebug_remove_adapter();
4980 driver_unregister(&sdebug_driverfs_driver);
4981 bus_unregister(&pseudo_lld_bus);
4982 root_device_unregister(pseudo_primary);
4983
4984 vfree(dif_storep);
4985 vfree(fake_storep);
4986}
4987
4988device_initcall(scsi_debug_init);
4989module_exit(scsi_debug_exit);
4990
4991static void sdebug_release_adapter(struct device * dev)
4992{
4993 struct sdebug_host_info *sdbg_host;
4994
4995 sdbg_host = to_sdebug_host(dev);
4996 kfree(sdbg_host);
4997}
4998
4999static int sdebug_add_adapter(void)
5000{
5001 int k, devs_per_host;
5002 int error = 0;
5003 struct sdebug_host_info *sdbg_host;
5004 struct sdebug_dev_info *sdbg_devinfo, *tmp;
5005
5006 sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL);
5007 if (NULL == sdbg_host) {
5008 pr_err("out of memory at line %d\n", __LINE__);
5009 return -ENOMEM;
5010 }
5011
5012 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
5013
5014 devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns;
5015 for (k = 0; k < devs_per_host; k++) {
5016 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
5017 if (!sdbg_devinfo) {
5018 pr_err("out of memory at line %d\n", __LINE__);
5019 error = -ENOMEM;
5020 goto clean;
5021 }
5022 }
5023
5024 spin_lock(&sdebug_host_list_lock);
5025 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
5026 spin_unlock(&sdebug_host_list_lock);
5027
5028 sdbg_host->dev.bus = &pseudo_lld_bus;
5029 sdbg_host->dev.parent = pseudo_primary;
5030 sdbg_host->dev.release = &sdebug_release_adapter;
5031 dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host);
5032
5033 error = device_register(&sdbg_host->dev);
5034
5035 if (error)
5036 goto clean;
5037
5038 ++scsi_debug_add_host;
5039 return error;
5040
5041clean:
5042 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
5043 dev_list) {
5044 list_del(&sdbg_devinfo->dev_list);
5045 kfree(sdbg_devinfo);
5046 }
5047
5048 kfree(sdbg_host);
5049 return error;
5050}
5051
5052static void sdebug_remove_adapter(void)
5053{
5054 struct sdebug_host_info * sdbg_host = NULL;
5055
5056 spin_lock(&sdebug_host_list_lock);
5057 if (!list_empty(&sdebug_host_list)) {
5058 sdbg_host = list_entry(sdebug_host_list.prev,
5059 struct sdebug_host_info, host_list);
5060 list_del(&sdbg_host->host_list);
5061 }
5062 spin_unlock(&sdebug_host_list_lock);
5063
5064 if (!sdbg_host)
5065 return;
5066
5067 device_unregister(&sdbg_host->dev);
5068 --scsi_debug_add_host;
5069}
5070
5071static int
5072sdebug_change_qdepth(struct scsi_device *sdev, int qdepth)
5073{
5074 int num_in_q = 0;
5075 unsigned long iflags;
5076 struct sdebug_dev_info *devip;
5077
5078 spin_lock_irqsave(&queued_arr_lock, iflags);
5079 devip = (struct sdebug_dev_info *)sdev->hostdata;
5080 if (NULL == devip) {
5081 spin_unlock_irqrestore(&queued_arr_lock, iflags);
5082 return -ENODEV;
5083 }
5084 num_in_q = atomic_read(&devip->num_in_q);
5085 spin_unlock_irqrestore(&queued_arr_lock, iflags);
5086
5087 if (qdepth < 1)
5088 qdepth = 1;
5089 /* allow to exceed max host queued_arr elements for testing */
5090 if (qdepth > SCSI_DEBUG_CANQUEUE + 10)
5091 qdepth = SCSI_DEBUG_CANQUEUE + 10;
5092 scsi_change_queue_depth(sdev, qdepth);
5093
5094 if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) {
5095 sdev_printk(KERN_INFO, sdev,
5096 "%s: qdepth=%d, num_in_q=%d\n",
5097 __func__, qdepth, num_in_q);
5098 }
5099 return sdev->queue_depth;
5100}
5101
5102static int
5103check_inject(struct scsi_cmnd *scp)
5104{
5105 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
5106
5107 memset(ep, 0, sizeof(struct sdebug_scmd_extra_t));
5108
5109 if (atomic_inc_return(&sdebug_cmnd_count) >=
5110 abs(scsi_debug_every_nth)) {
5111 atomic_set(&sdebug_cmnd_count, 0);
5112 if (scsi_debug_every_nth < -1)
5113 scsi_debug_every_nth = -1;
5114 if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts)
5115 return 1; /* ignore command causing timeout */
5116 else if (SCSI_DEBUG_OPT_MAC_TIMEOUT & scsi_debug_opts &&
5117 scsi_medium_access_command(scp))
5118 return 1; /* time out reads and writes */
5119 if (sdebug_any_injecting_opt) {
5120 int opts = scsi_debug_opts;
5121
5122 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
5123 ep->inj_recovered = true;
5124 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
5125 ep->inj_transport = true;
5126 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
5127 ep->inj_dif = true;
5128 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
5129 ep->inj_dix = true;
5130 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
5131 ep->inj_short = true;
5132 }
5133 }
5134 return 0;
5135}
5136
5137static int
5138scsi_debug_queuecommand(struct scsi_cmnd *scp)
5139{
5140 u8 sdeb_i;
5141 struct scsi_device *sdp = scp->device;
5142 const struct opcode_info_t *oip;
5143 const struct opcode_info_t *r_oip;
5144 struct sdebug_dev_info *devip;
5145 u8 *cmd = scp->cmnd;
5146 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
5147 int k, na;
5148 int errsts = 0;
5149 int errsts_no_connect = DID_NO_CONNECT << 16;
5150 u32 flags;
5151 u16 sa;
5152 u8 opcode = cmd[0];
5153 bool has_wlun_rl;
5154 bool debug = !!(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts);
5155
5156 scsi_set_resid(scp, 0);
5157 if (debug && !(SCSI_DEBUG_OPT_NO_CDB_NOISE & scsi_debug_opts)) {
5158 char b[120];
5159 int n, len, sb;
5160
5161 len = scp->cmd_len;
5162 sb = (int)sizeof(b);
5163 if (len > 32)
5164 strcpy(b, "too long, over 32 bytes");
5165 else {
5166 for (k = 0, n = 0; k < len && n < sb; ++k)
5167 n += scnprintf(b + n, sb - n, "%02x ",
5168 (u32)cmd[k]);
5169 }
5170 sdev_printk(KERN_INFO, sdp, "%s: cmd %s\n", my_name, b);
5171 }
5172 has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS);
5173 if ((sdp->lun >= scsi_debug_max_luns) && !has_wlun_rl)
5174 return schedule_resp(scp, NULL, errsts_no_connect, 0);
5175
5176 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */
5177 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */
5178 devip = (struct sdebug_dev_info *)sdp->hostdata;
5179 if (!devip) {
5180 devip = devInfoReg(sdp);
5181 if (NULL == devip)
5182 return schedule_resp(scp, NULL, errsts_no_connect, 0);
5183 }
5184 na = oip->num_attached;
5185 r_pfp = oip->pfp;
5186 if (na) { /* multiple commands with this opcode */
5187 r_oip = oip;
5188 if (FF_SA & r_oip->flags) {
5189 if (F_SA_LOW & oip->flags)
5190 sa = 0x1f & cmd[1];
5191 else
5192 sa = get_unaligned_be16(cmd + 8);
5193 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5194 if (opcode == oip->opcode && sa == oip->sa)
5195 break;
5196 }
5197 } else { /* since no service action only check opcode */
5198 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5199 if (opcode == oip->opcode)
5200 break;
5201 }
5202 }
5203 if (k > na) {
5204 if (F_SA_LOW & r_oip->flags)
5205 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4);
5206 else if (F_SA_HIGH & r_oip->flags)
5207 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7);
5208 else
5209 mk_sense_invalid_opcode(scp);
5210 goto check_cond;
5211 }
5212 } /* else (when na==0) we assume the oip is a match */
5213 flags = oip->flags;
5214 if (F_INV_OP & flags) {
5215 mk_sense_invalid_opcode(scp);
5216 goto check_cond;
5217 }
5218 if (has_wlun_rl && !(F_RL_WLUN_OK & flags)) {
5219 if (debug)
5220 sdev_printk(KERN_INFO, sdp, "scsi_debug: Opcode: "
5221 "0x%x not supported for wlun\n", opcode);
5222 mk_sense_invalid_opcode(scp);
5223 goto check_cond;
5224 }
5225 if (scsi_debug_strict) { /* check cdb against mask */
5226 u8 rem;
5227 int j;
5228
5229 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) {
5230 rem = ~oip->len_mask[k] & cmd[k];
5231 if (rem) {
5232 for (j = 7; j >= 0; --j, rem <<= 1) {
5233 if (0x80 & rem)
5234 break;
5235 }
5236 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j);
5237 goto check_cond;
5238 }
5239 }
5240 }
5241 if (!(F_SKIP_UA & flags) &&
5242 SDEBUG_NUM_UAS != find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS)) {
5243 errsts = check_readiness(scp, UAS_ONLY, devip);
5244 if (errsts)
5245 goto check_cond;
5246 }
5247 if ((F_M_ACCESS & flags) && devip->stopped) {
5248 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2);
5249 if (debug)
5250 sdev_printk(KERN_INFO, sdp, "%s reports: Not ready: "
5251 "%s\n", my_name, "initializing command "
5252 "required");
5253 errsts = check_condition_result;
5254 goto fini;
5255 }
5256 if (scsi_debug_fake_rw && (F_FAKE_RW & flags))
5257 goto fini;
5258 if (scsi_debug_every_nth) {
5259 if (check_inject(scp))
5260 return 0; /* ignore command: make trouble */
5261 }
5262 if (oip->pfp) /* if this command has a resp_* function, call it */
5263 errsts = oip->pfp(scp, devip);
5264 else if (r_pfp) /* if leaf function ptr NULL, try the root's */
5265 errsts = r_pfp(scp, devip);
5266
5267fini:
5268 return schedule_resp(scp, devip, errsts,
5269 ((F_DELAY_OVERR & flags) ? 0 : scsi_debug_delay));
5270check_cond:
5271 return schedule_resp(scp, devip, check_condition_result, 0);
5272}
5273
5274static int
5275sdebug_queuecommand_lock_or_not(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
5276{
5277 if (scsi_debug_host_lock) {
5278 unsigned long iflags;
5279 int rc;
5280
5281 spin_lock_irqsave(shost->host_lock, iflags);
5282 rc = scsi_debug_queuecommand(cmd);
5283 spin_unlock_irqrestore(shost->host_lock, iflags);
5284 return rc;
5285 } else
5286 return scsi_debug_queuecommand(cmd);
5287}
5288
5289static struct scsi_host_template sdebug_driver_template = {
5290 .show_info = scsi_debug_show_info,
5291 .write_info = scsi_debug_write_info,
5292 .proc_name = sdebug_proc_name,
5293 .name = "SCSI DEBUG",
5294 .info = scsi_debug_info,
5295 .slave_alloc = scsi_debug_slave_alloc,
5296 .slave_configure = scsi_debug_slave_configure,
5297 .slave_destroy = scsi_debug_slave_destroy,
5298 .ioctl = scsi_debug_ioctl,
5299 .queuecommand = sdebug_queuecommand_lock_or_not,
5300 .change_queue_depth = sdebug_change_qdepth,
5301 .eh_abort_handler = scsi_debug_abort,
5302 .eh_device_reset_handler = scsi_debug_device_reset,
5303 .eh_target_reset_handler = scsi_debug_target_reset,
5304 .eh_bus_reset_handler = scsi_debug_bus_reset,
5305 .eh_host_reset_handler = scsi_debug_host_reset,
5306 .can_queue = SCSI_DEBUG_CANQUEUE,
5307 .this_id = 7,
5308 .sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS,
5309 .cmd_per_lun = DEF_CMD_PER_LUN,
5310 .max_sectors = -1U,
5311 .use_clustering = DISABLE_CLUSTERING,
5312 .module = THIS_MODULE,
5313 .track_queue_depth = 1,
5314 .cmd_size = sizeof(struct sdebug_scmd_extra_t),
5315};
5316
5317static int sdebug_driver_probe(struct device * dev)
5318{
5319 int error = 0;
5320 int opts;
5321 struct sdebug_host_info *sdbg_host;
5322 struct Scsi_Host *hpnt;
5323 int host_prot;
5324
5325 sdbg_host = to_sdebug_host(dev);
5326
5327 sdebug_driver_template.can_queue = scsi_debug_max_queue;
5328 if (scsi_debug_clustering)
5329 sdebug_driver_template.use_clustering = ENABLE_CLUSTERING;
5330 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
5331 if (NULL == hpnt) {
5332 pr_err("scsi_host_alloc failed\n");
5333 error = -ENODEV;
5334 return error;
5335 }
5336
5337 sdbg_host->shost = hpnt;
5338 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
5339 if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id))
5340 hpnt->max_id = scsi_debug_num_tgts + 1;
5341 else
5342 hpnt->max_id = scsi_debug_num_tgts;
5343 /* = scsi_debug_max_luns; */
5344 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
5345
5346 host_prot = 0;
5347
5348 switch (scsi_debug_dif) {
5349
5350 case SD_DIF_TYPE1_PROTECTION:
5351 host_prot = SHOST_DIF_TYPE1_PROTECTION;
5352 if (scsi_debug_dix)
5353 host_prot |= SHOST_DIX_TYPE1_PROTECTION;
5354 break;
5355
5356 case SD_DIF_TYPE2_PROTECTION:
5357 host_prot = SHOST_DIF_TYPE2_PROTECTION;
5358 if (scsi_debug_dix)
5359 host_prot |= SHOST_DIX_TYPE2_PROTECTION;
5360 break;
5361
5362 case SD_DIF_TYPE3_PROTECTION:
5363 host_prot = SHOST_DIF_TYPE3_PROTECTION;
5364 if (scsi_debug_dix)
5365 host_prot |= SHOST_DIX_TYPE3_PROTECTION;
5366 break;
5367
5368 default:
5369 if (scsi_debug_dix)
5370 host_prot |= SHOST_DIX_TYPE0_PROTECTION;
5371 break;
5372 }
5373
5374 scsi_host_set_prot(hpnt, host_prot);
5375
5376 pr_info("host protection%s%s%s%s%s%s%s\n",
5377 (host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
5378 (host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
5379 (host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
5380 (host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
5381 (host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
5382 (host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
5383 (host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
5384
5385 if (scsi_debug_guard == 1)
5386 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
5387 else
5388 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
5389
5390 opts = scsi_debug_opts;
5391 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
5392 sdebug_any_injecting_opt = true;
5393 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
5394 sdebug_any_injecting_opt = true;
5395 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
5396 sdebug_any_injecting_opt = true;
5397 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
5398 sdebug_any_injecting_opt = true;
5399 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
5400 sdebug_any_injecting_opt = true;
5401
5402 error = scsi_add_host(hpnt, &sdbg_host->dev);
5403 if (error) {
5404 pr_err("scsi_add_host failed\n");
5405 error = -ENODEV;
5406 scsi_host_put(hpnt);
5407 } else
5408 scsi_scan_host(hpnt);
5409
5410 return error;
5411}
5412
5413static int sdebug_driver_remove(struct device * dev)
5414{
5415 struct sdebug_host_info *sdbg_host;
5416 struct sdebug_dev_info *sdbg_devinfo, *tmp;
5417
5418 sdbg_host = to_sdebug_host(dev);
5419
5420 if (!sdbg_host) {
5421 pr_err("Unable to locate host info\n");
5422 return -ENODEV;
5423 }
5424
5425 scsi_remove_host(sdbg_host->shost);
5426
5427 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
5428 dev_list) {
5429 list_del(&sdbg_devinfo->dev_list);
5430 kfree(sdbg_devinfo);
5431 }
5432
5433 scsi_host_put(sdbg_host->shost);
5434 return 0;
5435}
5436
5437static int pseudo_lld_bus_match(struct device *dev,
5438 struct device_driver *dev_driver)
5439{
5440 return 1;
5441}
5442
5443static struct bus_type pseudo_lld_bus = {
5444 .name = "pseudo",
5445 .match = pseudo_lld_bus_match,
5446 .probe = sdebug_driver_probe,
5447 .remove = sdebug_driver_remove,
5448 .drv_groups = sdebug_drv_groups,
5449};