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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 * 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#include <linux/module.h>
29
30#include <linux/kernel.h>
31#include <linux/errno.h>
32#include <linux/timer.h>
33#include <linux/slab.h>
34#include <linux/types.h>
35#include <linux/string.h>
36#include <linux/genhd.h>
37#include <linux/fs.h>
38#include <linux/init.h>
39#include <linux/proc_fs.h>
40#include <linux/vmalloc.h>
41#include <linux/moduleparam.h>
42#include <linux/scatterlist.h>
43#include <linux/blkdev.h>
44#include <linux/crc-t10dif.h>
45
46#include <net/checksum.h>
47
48#include <asm/unaligned.h>
49
50#include <scsi/scsi.h>
51#include <scsi/scsi_cmnd.h>
52#include <scsi/scsi_device.h>
53#include <scsi/scsi_host.h>
54#include <scsi/scsicam.h>
55#include <scsi/scsi_eh.h>
56#include <scsi/scsi_dbg.h>
57
58#include "sd.h"
59#include "scsi_logging.h"
60
61#define SCSI_DEBUG_VERSION "1.82"
62static const char * scsi_debug_version_date = "20100324";
63
64/* Additional Sense Code (ASC) */
65#define NO_ADDITIONAL_SENSE 0x0
66#define LOGICAL_UNIT_NOT_READY 0x4
67#define UNRECOVERED_READ_ERR 0x11
68#define PARAMETER_LIST_LENGTH_ERR 0x1a
69#define INVALID_OPCODE 0x20
70#define ADDR_OUT_OF_RANGE 0x21
71#define INVALID_COMMAND_OPCODE 0x20
72#define INVALID_FIELD_IN_CDB 0x24
73#define INVALID_FIELD_IN_PARAM_LIST 0x26
74#define POWERON_RESET 0x29
75#define SAVING_PARAMS_UNSUP 0x39
76#define TRANSPORT_PROBLEM 0x4b
77#define THRESHOLD_EXCEEDED 0x5d
78#define LOW_POWER_COND_ON 0x5e
79
80/* Additional Sense Code Qualifier (ASCQ) */
81#define ACK_NAK_TO 0x3
82
83#define SDEBUG_TAGGED_QUEUING 0 /* 0 | MSG_SIMPLE_TAG | MSG_ORDERED_TAG */
84
85/* Default values for driver parameters */
86#define DEF_NUM_HOST 1
87#define DEF_NUM_TGTS 1
88#define DEF_MAX_LUNS 1
89/* With these defaults, this driver will make 1 host with 1 target
90 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
91 */
92#define DEF_ATO 1
93#define DEF_DELAY 1
94#define DEF_DEV_SIZE_MB 8
95#define DEF_DIF 0
96#define DEF_DIX 0
97#define DEF_D_SENSE 0
98#define DEF_EVERY_NTH 0
99#define DEF_FAKE_RW 0
100#define DEF_GUARD 0
101#define DEF_LBPU 0
102#define DEF_LBPWS 0
103#define DEF_LBPWS10 0
104#define DEF_LOWEST_ALIGNED 0
105#define DEF_NO_LUN_0 0
106#define DEF_NUM_PARTS 0
107#define DEF_OPTS 0
108#define DEF_OPT_BLKS 64
109#define DEF_PHYSBLK_EXP 0
110#define DEF_PTYPE 0
111#define DEF_SCSI_LEVEL 5 /* INQUIRY, byte2 [5->SPC-3] */
112#define DEF_SECTOR_SIZE 512
113#define DEF_UNMAP_ALIGNMENT 0
114#define DEF_UNMAP_GRANULARITY 1
115#define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
116#define DEF_UNMAP_MAX_DESC 256
117#define DEF_VIRTUAL_GB 0
118#define DEF_VPD_USE_HOSTNO 1
119#define DEF_WRITESAME_LENGTH 0xFFFF
120
121/* bit mask values for scsi_debug_opts */
122#define SCSI_DEBUG_OPT_NOISE 1
123#define SCSI_DEBUG_OPT_MEDIUM_ERR 2
124#define SCSI_DEBUG_OPT_TIMEOUT 4
125#define SCSI_DEBUG_OPT_RECOVERED_ERR 8
126#define SCSI_DEBUG_OPT_TRANSPORT_ERR 16
127#define SCSI_DEBUG_OPT_DIF_ERR 32
128#define SCSI_DEBUG_OPT_DIX_ERR 64
129/* When "every_nth" > 0 then modulo "every_nth" commands:
130 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
131 * - a RECOVERED_ERROR is simulated on successful read and write
132 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
133 * - a TRANSPORT_ERROR is simulated on successful read and write
134 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
135 *
136 * When "every_nth" < 0 then after "- every_nth" commands:
137 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
138 * - a RECOVERED_ERROR is simulated on successful read and write
139 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
140 * - a TRANSPORT_ERROR is simulated on successful read and write
141 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
142 * This will continue until some other action occurs (e.g. the user
143 * writing a new value (other than -1 or 1) to every_nth via sysfs).
144 */
145
146/* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
147 * sector on read commands: */
148#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
149#define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
150
151/* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
152 * or "peripheral device" addressing (value 0) */
153#define SAM2_LUN_ADDRESS_METHOD 0
154#define SAM2_WLUN_REPORT_LUNS 0xc101
155
156/* Can queue up to this number of commands. Typically commands that
157 * that have a non-zero delay are queued. */
158#define SCSI_DEBUG_CANQUEUE 255
159
160static int scsi_debug_add_host = DEF_NUM_HOST;
161static int scsi_debug_ato = DEF_ATO;
162static int scsi_debug_delay = DEF_DELAY;
163static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB;
164static int scsi_debug_dif = DEF_DIF;
165static int scsi_debug_dix = DEF_DIX;
166static int scsi_debug_dsense = DEF_D_SENSE;
167static int scsi_debug_every_nth = DEF_EVERY_NTH;
168static int scsi_debug_fake_rw = DEF_FAKE_RW;
169static int scsi_debug_guard = DEF_GUARD;
170static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED;
171static int scsi_debug_max_luns = DEF_MAX_LUNS;
172static int scsi_debug_max_queue = SCSI_DEBUG_CANQUEUE;
173static int scsi_debug_no_lun_0 = DEF_NO_LUN_0;
174static int scsi_debug_no_uld = 0;
175static int scsi_debug_num_parts = DEF_NUM_PARTS;
176static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */
177static int scsi_debug_opt_blks = DEF_OPT_BLKS;
178static int scsi_debug_opts = DEF_OPTS;
179static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP;
180static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */
181static int scsi_debug_scsi_level = DEF_SCSI_LEVEL;
182static int scsi_debug_sector_size = DEF_SECTOR_SIZE;
183static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB;
184static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
185static unsigned int scsi_debug_lbpu = DEF_LBPU;
186static unsigned int scsi_debug_lbpws = DEF_LBPWS;
187static unsigned int scsi_debug_lbpws10 = DEF_LBPWS10;
188static unsigned int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
189static unsigned int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY;
190static unsigned int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
191static unsigned int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
192static unsigned int scsi_debug_write_same_length = DEF_WRITESAME_LENGTH;
193
194static int scsi_debug_cmnd_count = 0;
195
196#define DEV_READONLY(TGT) (0)
197#define DEV_REMOVEABLE(TGT) (0)
198
199static unsigned int sdebug_store_sectors;
200static sector_t sdebug_capacity; /* in sectors */
201
202/* old BIOS stuff, kernel may get rid of them but some mode sense pages
203 may still need them */
204static int sdebug_heads; /* heads per disk */
205static int sdebug_cylinders_per; /* cylinders per surface */
206static int sdebug_sectors_per; /* sectors per cylinder */
207
208#define SDEBUG_MAX_PARTS 4
209
210#define SDEBUG_SENSE_LEN 32
211
212#define SCSI_DEBUG_MAX_CMD_LEN 32
213
214static unsigned int scsi_debug_lbp(void)
215{
216 return scsi_debug_lbpu | scsi_debug_lbpws | scsi_debug_lbpws10;
217}
218
219struct sdebug_dev_info {
220 struct list_head dev_list;
221 unsigned char sense_buff[SDEBUG_SENSE_LEN]; /* weak nexus */
222 unsigned int channel;
223 unsigned int target;
224 unsigned int lun;
225 struct sdebug_host_info *sdbg_host;
226 unsigned int wlun;
227 char reset;
228 char stopped;
229 char used;
230};
231
232struct sdebug_host_info {
233 struct list_head host_list;
234 struct Scsi_Host *shost;
235 struct device dev;
236 struct list_head dev_info_list;
237};
238
239#define to_sdebug_host(d) \
240 container_of(d, struct sdebug_host_info, dev)
241
242static LIST_HEAD(sdebug_host_list);
243static DEFINE_SPINLOCK(sdebug_host_list_lock);
244
245typedef void (* done_funct_t) (struct scsi_cmnd *);
246
247struct sdebug_queued_cmd {
248 int in_use;
249 struct timer_list cmnd_timer;
250 done_funct_t done_funct;
251 struct scsi_cmnd * a_cmnd;
252 int scsi_result;
253};
254static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
255
256static unsigned char * fake_storep; /* ramdisk storage */
257static unsigned char *dif_storep; /* protection info */
258static void *map_storep; /* provisioning map */
259
260static unsigned long map_size;
261static int num_aborts = 0;
262static int num_dev_resets = 0;
263static int num_bus_resets = 0;
264static int num_host_resets = 0;
265static int dix_writes;
266static int dix_reads;
267static int dif_errors;
268
269static DEFINE_SPINLOCK(queued_arr_lock);
270static DEFINE_RWLOCK(atomic_rw);
271
272static char sdebug_proc_name[] = "scsi_debug";
273
274static struct bus_type pseudo_lld_bus;
275
276static inline sector_t dif_offset(sector_t sector)
277{
278 return sector << 3;
279}
280
281static struct device_driver sdebug_driverfs_driver = {
282 .name = sdebug_proc_name,
283 .bus = &pseudo_lld_bus,
284};
285
286static const int check_condition_result =
287 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
288
289static const int illegal_condition_result =
290 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
291
292static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
293 0, 0, 0x2, 0x4b};
294static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
295 0, 0, 0x0, 0x0};
296
297static int sdebug_add_adapter(void);
298static void sdebug_remove_adapter(void);
299
300static void sdebug_max_tgts_luns(void)
301{
302 struct sdebug_host_info *sdbg_host;
303 struct Scsi_Host *hpnt;
304
305 spin_lock(&sdebug_host_list_lock);
306 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
307 hpnt = sdbg_host->shost;
308 if ((hpnt->this_id >= 0) &&
309 (scsi_debug_num_tgts > hpnt->this_id))
310 hpnt->max_id = scsi_debug_num_tgts + 1;
311 else
312 hpnt->max_id = scsi_debug_num_tgts;
313 /* scsi_debug_max_luns; */
314 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS;
315 }
316 spin_unlock(&sdebug_host_list_lock);
317}
318
319static void mk_sense_buffer(struct sdebug_dev_info *devip, int key,
320 int asc, int asq)
321{
322 unsigned char *sbuff;
323
324 sbuff = devip->sense_buff;
325 memset(sbuff, 0, SDEBUG_SENSE_LEN);
326
327 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, key, asc, asq);
328
329 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
330 printk(KERN_INFO "scsi_debug: [sense_key,asc,ascq]: "
331 "[0x%x,0x%x,0x%x]\n", key, asc, asq);
332}
333
334static void get_data_transfer_info(unsigned char *cmd,
335 unsigned long long *lba, unsigned int *num,
336 u32 *ei_lba)
337{
338 *ei_lba = 0;
339
340 switch (*cmd) {
341 case VARIABLE_LENGTH_CMD:
342 *lba = (u64)cmd[19] | (u64)cmd[18] << 8 |
343 (u64)cmd[17] << 16 | (u64)cmd[16] << 24 |
344 (u64)cmd[15] << 32 | (u64)cmd[14] << 40 |
345 (u64)cmd[13] << 48 | (u64)cmd[12] << 56;
346
347 *ei_lba = (u32)cmd[23] | (u32)cmd[22] << 8 |
348 (u32)cmd[21] << 16 | (u32)cmd[20] << 24;
349
350 *num = (u32)cmd[31] | (u32)cmd[30] << 8 | (u32)cmd[29] << 16 |
351 (u32)cmd[28] << 24;
352 break;
353
354 case WRITE_SAME_16:
355 case WRITE_16:
356 case READ_16:
357 *lba = (u64)cmd[9] | (u64)cmd[8] << 8 |
358 (u64)cmd[7] << 16 | (u64)cmd[6] << 24 |
359 (u64)cmd[5] << 32 | (u64)cmd[4] << 40 |
360 (u64)cmd[3] << 48 | (u64)cmd[2] << 56;
361
362 *num = (u32)cmd[13] | (u32)cmd[12] << 8 | (u32)cmd[11] << 16 |
363 (u32)cmd[10] << 24;
364 break;
365 case WRITE_12:
366 case READ_12:
367 *lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 |
368 (u32)cmd[2] << 24;
369
370 *num = (u32)cmd[9] | (u32)cmd[8] << 8 | (u32)cmd[7] << 16 |
371 (u32)cmd[6] << 24;
372 break;
373 case WRITE_SAME:
374 case WRITE_10:
375 case READ_10:
376 case XDWRITEREAD_10:
377 *lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 |
378 (u32)cmd[2] << 24;
379
380 *num = (u32)cmd[8] | (u32)cmd[7] << 8;
381 break;
382 case WRITE_6:
383 case READ_6:
384 *lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
385 (u32)(cmd[1] & 0x1f) << 16;
386 *num = (0 == cmd[4]) ? 256 : cmd[4];
387 break;
388 default:
389 break;
390 }
391}
392
393static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
394{
395 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
396 printk(KERN_INFO "scsi_debug: ioctl: cmd=0x%x\n", cmd);
397 }
398 return -EINVAL;
399 /* return -ENOTTY; // correct return but upsets fdisk */
400}
401
402static int check_readiness(struct scsi_cmnd * SCpnt, int reset_only,
403 struct sdebug_dev_info * devip)
404{
405 if (devip->reset) {
406 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
407 printk(KERN_INFO "scsi_debug: Reporting Unit "
408 "attention: power on reset\n");
409 devip->reset = 0;
410 mk_sense_buffer(devip, UNIT_ATTENTION, POWERON_RESET, 0);
411 return check_condition_result;
412 }
413 if ((0 == reset_only) && devip->stopped) {
414 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
415 printk(KERN_INFO "scsi_debug: Reporting Not "
416 "ready: initializing command required\n");
417 mk_sense_buffer(devip, NOT_READY, LOGICAL_UNIT_NOT_READY,
418 0x2);
419 return check_condition_result;
420 }
421 return 0;
422}
423
424/* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */
425static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
426 int arr_len)
427{
428 int act_len;
429 struct scsi_data_buffer *sdb = scsi_in(scp);
430
431 if (!sdb->length)
432 return 0;
433 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
434 return (DID_ERROR << 16);
435
436 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
437 arr, arr_len);
438 if (sdb->resid)
439 sdb->resid -= act_len;
440 else
441 sdb->resid = scsi_bufflen(scp) - act_len;
442
443 return 0;
444}
445
446/* Returns number of bytes fetched into 'arr' or -1 if error. */
447static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
448 int arr_len)
449{
450 if (!scsi_bufflen(scp))
451 return 0;
452 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE))
453 return -1;
454
455 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
456}
457
458
459static const char * inq_vendor_id = "Linux ";
460static const char * inq_product_id = "scsi_debug ";
461static const char * inq_product_rev = "0004";
462
463static int inquiry_evpd_83(unsigned char * arr, int port_group_id,
464 int target_dev_id, int dev_id_num,
465 const char * dev_id_str,
466 int dev_id_str_len)
467{
468 int num, port_a;
469 char b[32];
470
471 port_a = target_dev_id + 1;
472 /* T10 vendor identifier field format (faked) */
473 arr[0] = 0x2; /* ASCII */
474 arr[1] = 0x1;
475 arr[2] = 0x0;
476 memcpy(&arr[4], inq_vendor_id, 8);
477 memcpy(&arr[12], inq_product_id, 16);
478 memcpy(&arr[28], dev_id_str, dev_id_str_len);
479 num = 8 + 16 + dev_id_str_len;
480 arr[3] = num;
481 num += 4;
482 if (dev_id_num >= 0) {
483 /* NAA-5, Logical unit identifier (binary) */
484 arr[num++] = 0x1; /* binary (not necessarily sas) */
485 arr[num++] = 0x3; /* PIV=0, lu, naa */
486 arr[num++] = 0x0;
487 arr[num++] = 0x8;
488 arr[num++] = 0x53; /* naa-5 ieee company id=0x333333 (fake) */
489 arr[num++] = 0x33;
490 arr[num++] = 0x33;
491 arr[num++] = 0x30;
492 arr[num++] = (dev_id_num >> 24);
493 arr[num++] = (dev_id_num >> 16) & 0xff;
494 arr[num++] = (dev_id_num >> 8) & 0xff;
495 arr[num++] = dev_id_num & 0xff;
496 /* Target relative port number */
497 arr[num++] = 0x61; /* proto=sas, binary */
498 arr[num++] = 0x94; /* PIV=1, target port, rel port */
499 arr[num++] = 0x0; /* reserved */
500 arr[num++] = 0x4; /* length */
501 arr[num++] = 0x0; /* reserved */
502 arr[num++] = 0x0; /* reserved */
503 arr[num++] = 0x0;
504 arr[num++] = 0x1; /* relative port A */
505 }
506 /* NAA-5, Target port identifier */
507 arr[num++] = 0x61; /* proto=sas, binary */
508 arr[num++] = 0x93; /* piv=1, target port, naa */
509 arr[num++] = 0x0;
510 arr[num++] = 0x8;
511 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
512 arr[num++] = 0x22;
513 arr[num++] = 0x22;
514 arr[num++] = 0x20;
515 arr[num++] = (port_a >> 24);
516 arr[num++] = (port_a >> 16) & 0xff;
517 arr[num++] = (port_a >> 8) & 0xff;
518 arr[num++] = port_a & 0xff;
519 /* NAA-5, Target port group identifier */
520 arr[num++] = 0x61; /* proto=sas, binary */
521 arr[num++] = 0x95; /* piv=1, target port group id */
522 arr[num++] = 0x0;
523 arr[num++] = 0x4;
524 arr[num++] = 0;
525 arr[num++] = 0;
526 arr[num++] = (port_group_id >> 8) & 0xff;
527 arr[num++] = port_group_id & 0xff;
528 /* NAA-5, Target device identifier */
529 arr[num++] = 0x61; /* proto=sas, binary */
530 arr[num++] = 0xa3; /* piv=1, target device, naa */
531 arr[num++] = 0x0;
532 arr[num++] = 0x8;
533 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
534 arr[num++] = 0x22;
535 arr[num++] = 0x22;
536 arr[num++] = 0x20;
537 arr[num++] = (target_dev_id >> 24);
538 arr[num++] = (target_dev_id >> 16) & 0xff;
539 arr[num++] = (target_dev_id >> 8) & 0xff;
540 arr[num++] = target_dev_id & 0xff;
541 /* SCSI name string: Target device identifier */
542 arr[num++] = 0x63; /* proto=sas, UTF-8 */
543 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
544 arr[num++] = 0x0;
545 arr[num++] = 24;
546 memcpy(arr + num, "naa.52222220", 12);
547 num += 12;
548 snprintf(b, sizeof(b), "%08X", target_dev_id);
549 memcpy(arr + num, b, 8);
550 num += 8;
551 memset(arr + num, 0, 4);
552 num += 4;
553 return num;
554}
555
556
557static unsigned char vpd84_data[] = {
558/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
559 0x22,0x22,0x22,0x0,0xbb,0x1,
560 0x22,0x22,0x22,0x0,0xbb,0x2,
561};
562
563static int inquiry_evpd_84(unsigned char * arr)
564{
565 memcpy(arr, vpd84_data, sizeof(vpd84_data));
566 return sizeof(vpd84_data);
567}
568
569static int inquiry_evpd_85(unsigned char * arr)
570{
571 int num = 0;
572 const char * na1 = "https://www.kernel.org/config";
573 const char * na2 = "http://www.kernel.org/log";
574 int plen, olen;
575
576 arr[num++] = 0x1; /* lu, storage config */
577 arr[num++] = 0x0; /* reserved */
578 arr[num++] = 0x0;
579 olen = strlen(na1);
580 plen = olen + 1;
581 if (plen % 4)
582 plen = ((plen / 4) + 1) * 4;
583 arr[num++] = plen; /* length, null termianted, padded */
584 memcpy(arr + num, na1, olen);
585 memset(arr + num + olen, 0, plen - olen);
586 num += plen;
587
588 arr[num++] = 0x4; /* lu, logging */
589 arr[num++] = 0x0; /* reserved */
590 arr[num++] = 0x0;
591 olen = strlen(na2);
592 plen = olen + 1;
593 if (plen % 4)
594 plen = ((plen / 4) + 1) * 4;
595 arr[num++] = plen; /* length, null terminated, padded */
596 memcpy(arr + num, na2, olen);
597 memset(arr + num + olen, 0, plen - olen);
598 num += plen;
599
600 return num;
601}
602
603/* SCSI ports VPD page */
604static int inquiry_evpd_88(unsigned char * arr, int target_dev_id)
605{
606 int num = 0;
607 int port_a, port_b;
608
609 port_a = target_dev_id + 1;
610 port_b = port_a + 1;
611 arr[num++] = 0x0; /* reserved */
612 arr[num++] = 0x0; /* reserved */
613 arr[num++] = 0x0;
614 arr[num++] = 0x1; /* relative port 1 (primary) */
615 memset(arr + num, 0, 6);
616 num += 6;
617 arr[num++] = 0x0;
618 arr[num++] = 12; /* length tp descriptor */
619 /* naa-5 target port identifier (A) */
620 arr[num++] = 0x61; /* proto=sas, binary */
621 arr[num++] = 0x93; /* PIV=1, target port, NAA */
622 arr[num++] = 0x0; /* reserved */
623 arr[num++] = 0x8; /* length */
624 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
625 arr[num++] = 0x22;
626 arr[num++] = 0x22;
627 arr[num++] = 0x20;
628 arr[num++] = (port_a >> 24);
629 arr[num++] = (port_a >> 16) & 0xff;
630 arr[num++] = (port_a >> 8) & 0xff;
631 arr[num++] = port_a & 0xff;
632
633 arr[num++] = 0x0; /* reserved */
634 arr[num++] = 0x0; /* reserved */
635 arr[num++] = 0x0;
636 arr[num++] = 0x2; /* relative port 2 (secondary) */
637 memset(arr + num, 0, 6);
638 num += 6;
639 arr[num++] = 0x0;
640 arr[num++] = 12; /* length tp descriptor */
641 /* naa-5 target port identifier (B) */
642 arr[num++] = 0x61; /* proto=sas, binary */
643 arr[num++] = 0x93; /* PIV=1, target port, NAA */
644 arr[num++] = 0x0; /* reserved */
645 arr[num++] = 0x8; /* length */
646 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
647 arr[num++] = 0x22;
648 arr[num++] = 0x22;
649 arr[num++] = 0x20;
650 arr[num++] = (port_b >> 24);
651 arr[num++] = (port_b >> 16) & 0xff;
652 arr[num++] = (port_b >> 8) & 0xff;
653 arr[num++] = port_b & 0xff;
654
655 return num;
656}
657
658
659static unsigned char vpd89_data[] = {
660/* from 4th byte */ 0,0,0,0,
661'l','i','n','u','x',' ',' ',' ',
662'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
663'1','2','3','4',
6640x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
6650xec,0,0,0,
6660x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
6670,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
6680x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
6690x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
6700x53,0x41,
6710x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
6720x20,0x20,
6730x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
6740x10,0x80,
6750,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
6760x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
6770x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
6780,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
6790x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
6800x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
6810,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
6820,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6830,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6840,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6850x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
6860,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
6870xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
6880,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
6890,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6900,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6910,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6920,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6930,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6940,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6950,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6960,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6970,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6980,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6990,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
7000,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
701};
702
703static int inquiry_evpd_89(unsigned char * arr)
704{
705 memcpy(arr, vpd89_data, sizeof(vpd89_data));
706 return sizeof(vpd89_data);
707}
708
709
710/* Block limits VPD page (SBC-3) */
711static unsigned char vpdb0_data[] = {
712 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
713 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
714 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
715 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
716};
717
718static int inquiry_evpd_b0(unsigned char * arr)
719{
720 unsigned int gran;
721
722 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
723
724 /* Optimal transfer length granularity */
725 gran = 1 << scsi_debug_physblk_exp;
726 arr[2] = (gran >> 8) & 0xff;
727 arr[3] = gran & 0xff;
728
729 /* Maximum Transfer Length */
730 if (sdebug_store_sectors > 0x400) {
731 arr[4] = (sdebug_store_sectors >> 24) & 0xff;
732 arr[5] = (sdebug_store_sectors >> 16) & 0xff;
733 arr[6] = (sdebug_store_sectors >> 8) & 0xff;
734 arr[7] = sdebug_store_sectors & 0xff;
735 }
736
737 /* Optimal Transfer Length */
738 put_unaligned_be32(scsi_debug_opt_blks, &arr[8]);
739
740 if (scsi_debug_lbpu) {
741 /* Maximum Unmap LBA Count */
742 put_unaligned_be32(scsi_debug_unmap_max_blocks, &arr[16]);
743
744 /* Maximum Unmap Block Descriptor Count */
745 put_unaligned_be32(scsi_debug_unmap_max_desc, &arr[20]);
746 }
747
748 /* Unmap Granularity Alignment */
749 if (scsi_debug_unmap_alignment) {
750 put_unaligned_be32(scsi_debug_unmap_alignment, &arr[28]);
751 arr[28] |= 0x80; /* UGAVALID */
752 }
753
754 /* Optimal Unmap Granularity */
755 put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]);
756
757 /* Maximum WRITE SAME Length */
758 put_unaligned_be64(scsi_debug_write_same_length, &arr[32]);
759
760 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
761
762 return sizeof(vpdb0_data);
763}
764
765/* Block device characteristics VPD page (SBC-3) */
766static int inquiry_evpd_b1(unsigned char *arr)
767{
768 memset(arr, 0, 0x3c);
769 arr[0] = 0;
770 arr[1] = 1; /* non rotating medium (e.g. solid state) */
771 arr[2] = 0;
772 arr[3] = 5; /* less than 1.8" */
773
774 return 0x3c;
775}
776
777/* Thin provisioning VPD page (SBC-3) */
778static int inquiry_evpd_b2(unsigned char *arr)
779{
780 memset(arr, 0, 0x8);
781 arr[0] = 0; /* threshold exponent */
782
783 if (scsi_debug_lbpu)
784 arr[1] = 1 << 7;
785
786 if (scsi_debug_lbpws)
787 arr[1] |= 1 << 6;
788
789 if (scsi_debug_lbpws10)
790 arr[1] |= 1 << 5;
791
792 return 0x8;
793}
794
795#define SDEBUG_LONG_INQ_SZ 96
796#define SDEBUG_MAX_INQ_ARR_SZ 584
797
798static int resp_inquiry(struct scsi_cmnd * scp, int target,
799 struct sdebug_dev_info * devip)
800{
801 unsigned char pq_pdt;
802 unsigned char * arr;
803 unsigned char *cmd = (unsigned char *)scp->cmnd;
804 int alloc_len, n, ret;
805
806 alloc_len = (cmd[3] << 8) + cmd[4];
807 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
808 if (! arr)
809 return DID_REQUEUE << 16;
810 if (devip->wlun)
811 pq_pdt = 0x1e; /* present, wlun */
812 else if (scsi_debug_no_lun_0 && (0 == devip->lun))
813 pq_pdt = 0x7f; /* not present, no device type */
814 else
815 pq_pdt = (scsi_debug_ptype & 0x1f);
816 arr[0] = pq_pdt;
817 if (0x2 & cmd[1]) { /* CMDDT bit set */
818 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
819 0);
820 kfree(arr);
821 return check_condition_result;
822 } else if (0x1 & cmd[1]) { /* EVPD bit set */
823 int lu_id_num, port_group_id, target_dev_id, len;
824 char lu_id_str[6];
825 int host_no = devip->sdbg_host->shost->host_no;
826
827 port_group_id = (((host_no + 1) & 0x7f) << 8) +
828 (devip->channel & 0x7f);
829 if (0 == scsi_debug_vpd_use_hostno)
830 host_no = 0;
831 lu_id_num = devip->wlun ? -1 : (((host_no + 1) * 2000) +
832 (devip->target * 1000) + devip->lun);
833 target_dev_id = ((host_no + 1) * 2000) +
834 (devip->target * 1000) - 3;
835 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
836 if (0 == cmd[2]) { /* supported vital product data pages */
837 arr[1] = cmd[2]; /*sanity */
838 n = 4;
839 arr[n++] = 0x0; /* this page */
840 arr[n++] = 0x80; /* unit serial number */
841 arr[n++] = 0x83; /* device identification */
842 arr[n++] = 0x84; /* software interface ident. */
843 arr[n++] = 0x85; /* management network addresses */
844 arr[n++] = 0x86; /* extended inquiry */
845 arr[n++] = 0x87; /* mode page policy */
846 arr[n++] = 0x88; /* SCSI ports */
847 arr[n++] = 0x89; /* ATA information */
848 arr[n++] = 0xb0; /* Block limits (SBC) */
849 arr[n++] = 0xb1; /* Block characteristics (SBC) */
850 if (scsi_debug_lbp()) /* Logical Block Prov. (SBC) */
851 arr[n++] = 0xb2;
852 arr[3] = n - 4; /* number of supported VPD pages */
853 } else if (0x80 == cmd[2]) { /* unit serial number */
854 arr[1] = cmd[2]; /*sanity */
855 arr[3] = len;
856 memcpy(&arr[4], lu_id_str, len);
857 } else if (0x83 == cmd[2]) { /* device identification */
858 arr[1] = cmd[2]; /*sanity */
859 arr[3] = inquiry_evpd_83(&arr[4], port_group_id,
860 target_dev_id, lu_id_num,
861 lu_id_str, len);
862 } else if (0x84 == cmd[2]) { /* Software interface ident. */
863 arr[1] = cmd[2]; /*sanity */
864 arr[3] = inquiry_evpd_84(&arr[4]);
865 } else if (0x85 == cmd[2]) { /* Management network addresses */
866 arr[1] = cmd[2]; /*sanity */
867 arr[3] = inquiry_evpd_85(&arr[4]);
868 } else if (0x86 == cmd[2]) { /* extended inquiry */
869 arr[1] = cmd[2]; /*sanity */
870 arr[3] = 0x3c; /* number of following entries */
871 if (scsi_debug_dif == SD_DIF_TYPE3_PROTECTION)
872 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
873 else if (scsi_debug_dif)
874 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
875 else
876 arr[4] = 0x0; /* no protection stuff */
877 arr[5] = 0x7; /* head of q, ordered + simple q's */
878 } else if (0x87 == cmd[2]) { /* mode page policy */
879 arr[1] = cmd[2]; /*sanity */
880 arr[3] = 0x8; /* number of following entries */
881 arr[4] = 0x2; /* disconnect-reconnect mp */
882 arr[6] = 0x80; /* mlus, shared */
883 arr[8] = 0x18; /* protocol specific lu */
884 arr[10] = 0x82; /* mlus, per initiator port */
885 } else if (0x88 == cmd[2]) { /* SCSI Ports */
886 arr[1] = cmd[2]; /*sanity */
887 arr[3] = inquiry_evpd_88(&arr[4], target_dev_id);
888 } else if (0x89 == cmd[2]) { /* ATA information */
889 arr[1] = cmd[2]; /*sanity */
890 n = inquiry_evpd_89(&arr[4]);
891 arr[2] = (n >> 8);
892 arr[3] = (n & 0xff);
893 } else if (0xb0 == cmd[2]) { /* Block limits (SBC) */
894 arr[1] = cmd[2]; /*sanity */
895 arr[3] = inquiry_evpd_b0(&arr[4]);
896 } else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */
897 arr[1] = cmd[2]; /*sanity */
898 arr[3] = inquiry_evpd_b1(&arr[4]);
899 } else if (0xb2 == cmd[2]) { /* Logical Block Prov. (SBC) */
900 arr[1] = cmd[2]; /*sanity */
901 arr[3] = inquiry_evpd_b2(&arr[4]);
902 } else {
903 /* Illegal request, invalid field in cdb */
904 mk_sense_buffer(devip, ILLEGAL_REQUEST,
905 INVALID_FIELD_IN_CDB, 0);
906 kfree(arr);
907 return check_condition_result;
908 }
909 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
910 ret = fill_from_dev_buffer(scp, arr,
911 min(len, SDEBUG_MAX_INQ_ARR_SZ));
912 kfree(arr);
913 return ret;
914 }
915 /* drops through here for a standard inquiry */
916 arr[1] = DEV_REMOVEABLE(target) ? 0x80 : 0; /* Removable disk */
917 arr[2] = scsi_debug_scsi_level;
918 arr[3] = 2; /* response_data_format==2 */
919 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
920 arr[5] = scsi_debug_dif ? 1 : 0; /* PROTECT bit */
921 if (0 == scsi_debug_vpd_use_hostno)
922 arr[5] = 0x10; /* claim: implicit TGPS */
923 arr[6] = 0x10; /* claim: MultiP */
924 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
925 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
926 memcpy(&arr[8], inq_vendor_id, 8);
927 memcpy(&arr[16], inq_product_id, 16);
928 memcpy(&arr[32], inq_product_rev, 4);
929 /* version descriptors (2 bytes each) follow */
930 arr[58] = 0x0; arr[59] = 0x77; /* SAM-3 ANSI */
931 arr[60] = 0x3; arr[61] = 0x14; /* SPC-3 ANSI */
932 n = 62;
933 if (scsi_debug_ptype == 0) {
934 arr[n++] = 0x3; arr[n++] = 0x3d; /* SBC-2 ANSI */
935 } else if (scsi_debug_ptype == 1) {
936 arr[n++] = 0x3; arr[n++] = 0x60; /* SSC-2 no version */
937 }
938 arr[n++] = 0xc; arr[n++] = 0xf; /* SAS-1.1 rev 10 */
939 ret = fill_from_dev_buffer(scp, arr,
940 min(alloc_len, SDEBUG_LONG_INQ_SZ));
941 kfree(arr);
942 return ret;
943}
944
945static int resp_requests(struct scsi_cmnd * scp,
946 struct sdebug_dev_info * devip)
947{
948 unsigned char * sbuff;
949 unsigned char *cmd = (unsigned char *)scp->cmnd;
950 unsigned char arr[SDEBUG_SENSE_LEN];
951 int want_dsense;
952 int len = 18;
953
954 memset(arr, 0, sizeof(arr));
955 if (devip->reset == 1)
956 mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0);
957 want_dsense = !!(cmd[1] & 1) || scsi_debug_dsense;
958 sbuff = devip->sense_buff;
959 if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
960 if (want_dsense) {
961 arr[0] = 0x72;
962 arr[1] = 0x0; /* NO_SENSE in sense_key */
963 arr[2] = THRESHOLD_EXCEEDED;
964 arr[3] = 0xff; /* TEST set and MRIE==6 */
965 } else {
966 arr[0] = 0x70;
967 arr[2] = 0x0; /* NO_SENSE in sense_key */
968 arr[7] = 0xa; /* 18 byte sense buffer */
969 arr[12] = THRESHOLD_EXCEEDED;
970 arr[13] = 0xff; /* TEST set and MRIE==6 */
971 }
972 } else {
973 memcpy(arr, sbuff, SDEBUG_SENSE_LEN);
974 if ((cmd[1] & 1) && (! scsi_debug_dsense)) {
975 /* DESC bit set and sense_buff in fixed format */
976 memset(arr, 0, sizeof(arr));
977 arr[0] = 0x72;
978 arr[1] = sbuff[2]; /* sense key */
979 arr[2] = sbuff[12]; /* asc */
980 arr[3] = sbuff[13]; /* ascq */
981 len = 8;
982 }
983 }
984 mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0);
985 return fill_from_dev_buffer(scp, arr, len);
986}
987
988static int resp_start_stop(struct scsi_cmnd * scp,
989 struct sdebug_dev_info * devip)
990{
991 unsigned char *cmd = (unsigned char *)scp->cmnd;
992 int power_cond, errsts, start;
993
994 if ((errsts = check_readiness(scp, 1, devip)))
995 return errsts;
996 power_cond = (cmd[4] & 0xf0) >> 4;
997 if (power_cond) {
998 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
999 0);
1000 return check_condition_result;
1001 }
1002 start = cmd[4] & 1;
1003 if (start == devip->stopped)
1004 devip->stopped = !start;
1005 return 0;
1006}
1007
1008static sector_t get_sdebug_capacity(void)
1009{
1010 if (scsi_debug_virtual_gb > 0)
1011 return (sector_t)scsi_debug_virtual_gb *
1012 (1073741824 / scsi_debug_sector_size);
1013 else
1014 return sdebug_store_sectors;
1015}
1016
1017#define SDEBUG_READCAP_ARR_SZ 8
1018static int resp_readcap(struct scsi_cmnd * scp,
1019 struct sdebug_dev_info * devip)
1020{
1021 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
1022 unsigned int capac;
1023 int errsts;
1024
1025 if ((errsts = check_readiness(scp, 1, devip)))
1026 return errsts;
1027 /* following just in case virtual_gb changed */
1028 sdebug_capacity = get_sdebug_capacity();
1029 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
1030 if (sdebug_capacity < 0xffffffff) {
1031 capac = (unsigned int)sdebug_capacity - 1;
1032 arr[0] = (capac >> 24);
1033 arr[1] = (capac >> 16) & 0xff;
1034 arr[2] = (capac >> 8) & 0xff;
1035 arr[3] = capac & 0xff;
1036 } else {
1037 arr[0] = 0xff;
1038 arr[1] = 0xff;
1039 arr[2] = 0xff;
1040 arr[3] = 0xff;
1041 }
1042 arr[6] = (scsi_debug_sector_size >> 8) & 0xff;
1043 arr[7] = scsi_debug_sector_size & 0xff;
1044 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1045}
1046
1047#define SDEBUG_READCAP16_ARR_SZ 32
1048static int resp_readcap16(struct scsi_cmnd * scp,
1049 struct sdebug_dev_info * devip)
1050{
1051 unsigned char *cmd = (unsigned char *)scp->cmnd;
1052 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
1053 unsigned long long capac;
1054 int errsts, k, alloc_len;
1055
1056 if ((errsts = check_readiness(scp, 1, devip)))
1057 return errsts;
1058 alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8)
1059 + cmd[13]);
1060 /* following just in case virtual_gb changed */
1061 sdebug_capacity = get_sdebug_capacity();
1062 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
1063 capac = sdebug_capacity - 1;
1064 for (k = 0; k < 8; ++k, capac >>= 8)
1065 arr[7 - k] = capac & 0xff;
1066 arr[8] = (scsi_debug_sector_size >> 24) & 0xff;
1067 arr[9] = (scsi_debug_sector_size >> 16) & 0xff;
1068 arr[10] = (scsi_debug_sector_size >> 8) & 0xff;
1069 arr[11] = scsi_debug_sector_size & 0xff;
1070 arr[13] = scsi_debug_physblk_exp & 0xf;
1071 arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f;
1072
1073 if (scsi_debug_lbp())
1074 arr[14] |= 0x80; /* LBPME */
1075
1076 arr[15] = scsi_debug_lowest_aligned & 0xff;
1077
1078 if (scsi_debug_dif) {
1079 arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */
1080 arr[12] |= 1; /* PROT_EN */
1081 }
1082
1083 return fill_from_dev_buffer(scp, arr,
1084 min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
1085}
1086
1087#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1088
1089static int resp_report_tgtpgs(struct scsi_cmnd * scp,
1090 struct sdebug_dev_info * devip)
1091{
1092 unsigned char *cmd = (unsigned char *)scp->cmnd;
1093 unsigned char * arr;
1094 int host_no = devip->sdbg_host->shost->host_no;
1095 int n, ret, alen, rlen;
1096 int port_group_a, port_group_b, port_a, port_b;
1097
1098 alen = ((cmd[6] << 24) + (cmd[7] << 16) + (cmd[8] << 8)
1099 + cmd[9]);
1100
1101 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1102 if (! arr)
1103 return DID_REQUEUE << 16;
1104 /*
1105 * EVPD page 0x88 states we have two ports, one
1106 * real and a fake port with no device connected.
1107 * So we create two port groups with one port each
1108 * and set the group with port B to unavailable.
1109 */
1110 port_a = 0x1; /* relative port A */
1111 port_b = 0x2; /* relative port B */
1112 port_group_a = (((host_no + 1) & 0x7f) << 8) +
1113 (devip->channel & 0x7f);
1114 port_group_b = (((host_no + 1) & 0x7f) << 8) +
1115 (devip->channel & 0x7f) + 0x80;
1116
1117 /*
1118 * The asymmetric access state is cycled according to the host_id.
1119 */
1120 n = 4;
1121 if (0 == scsi_debug_vpd_use_hostno) {
1122 arr[n++] = host_no % 3; /* Asymm access state */
1123 arr[n++] = 0x0F; /* claim: all states are supported */
1124 } else {
1125 arr[n++] = 0x0; /* Active/Optimized path */
1126 arr[n++] = 0x01; /* claim: only support active/optimized paths */
1127 }
1128 arr[n++] = (port_group_a >> 8) & 0xff;
1129 arr[n++] = port_group_a & 0xff;
1130 arr[n++] = 0; /* Reserved */
1131 arr[n++] = 0; /* Status code */
1132 arr[n++] = 0; /* Vendor unique */
1133 arr[n++] = 0x1; /* One port per group */
1134 arr[n++] = 0; /* Reserved */
1135 arr[n++] = 0; /* Reserved */
1136 arr[n++] = (port_a >> 8) & 0xff;
1137 arr[n++] = port_a & 0xff;
1138 arr[n++] = 3; /* Port unavailable */
1139 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
1140 arr[n++] = (port_group_b >> 8) & 0xff;
1141 arr[n++] = port_group_b & 0xff;
1142 arr[n++] = 0; /* Reserved */
1143 arr[n++] = 0; /* Status code */
1144 arr[n++] = 0; /* Vendor unique */
1145 arr[n++] = 0x1; /* One port per group */
1146 arr[n++] = 0; /* Reserved */
1147 arr[n++] = 0; /* Reserved */
1148 arr[n++] = (port_b >> 8) & 0xff;
1149 arr[n++] = port_b & 0xff;
1150
1151 rlen = n - 4;
1152 arr[0] = (rlen >> 24) & 0xff;
1153 arr[1] = (rlen >> 16) & 0xff;
1154 arr[2] = (rlen >> 8) & 0xff;
1155 arr[3] = rlen & 0xff;
1156
1157 /*
1158 * Return the smallest value of either
1159 * - The allocated length
1160 * - The constructed command length
1161 * - The maximum array size
1162 */
1163 rlen = min(alen,n);
1164 ret = fill_from_dev_buffer(scp, arr,
1165 min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1166 kfree(arr);
1167 return ret;
1168}
1169
1170/* <<Following mode page info copied from ST318451LW>> */
1171
1172static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target)
1173{ /* Read-Write Error Recovery page for mode_sense */
1174 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
1175 5, 0, 0xff, 0xff};
1176
1177 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
1178 if (1 == pcontrol)
1179 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
1180 return sizeof(err_recov_pg);
1181}
1182
1183static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target)
1184{ /* Disconnect-Reconnect page for mode_sense */
1185 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
1186 0, 0, 0, 0, 0, 0, 0, 0};
1187
1188 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
1189 if (1 == pcontrol)
1190 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
1191 return sizeof(disconnect_pg);
1192}
1193
1194static int resp_format_pg(unsigned char * p, int pcontrol, int target)
1195{ /* Format device page for mode_sense */
1196 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
1197 0, 0, 0, 0, 0, 0, 0, 0,
1198 0, 0, 0, 0, 0x40, 0, 0, 0};
1199
1200 memcpy(p, format_pg, sizeof(format_pg));
1201 p[10] = (sdebug_sectors_per >> 8) & 0xff;
1202 p[11] = sdebug_sectors_per & 0xff;
1203 p[12] = (scsi_debug_sector_size >> 8) & 0xff;
1204 p[13] = scsi_debug_sector_size & 0xff;
1205 if (DEV_REMOVEABLE(target))
1206 p[20] |= 0x20; /* should agree with INQUIRY */
1207 if (1 == pcontrol)
1208 memset(p + 2, 0, sizeof(format_pg) - 2);
1209 return sizeof(format_pg);
1210}
1211
1212static int resp_caching_pg(unsigned char * p, int pcontrol, int target)
1213{ /* Caching page for mode_sense */
1214 unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
1215 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
1216
1217 memcpy(p, caching_pg, sizeof(caching_pg));
1218 if (1 == pcontrol)
1219 memset(p + 2, 0, sizeof(caching_pg) - 2);
1220 return sizeof(caching_pg);
1221}
1222
1223static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
1224{ /* Control mode page for mode_sense */
1225 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
1226 0, 0, 0, 0};
1227 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
1228 0, 0, 0x2, 0x4b};
1229
1230 if (scsi_debug_dsense)
1231 ctrl_m_pg[2] |= 0x4;
1232 else
1233 ctrl_m_pg[2] &= ~0x4;
1234
1235 if (scsi_debug_ato)
1236 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
1237
1238 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
1239 if (1 == pcontrol)
1240 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
1241 else if (2 == pcontrol)
1242 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
1243 return sizeof(ctrl_m_pg);
1244}
1245
1246
1247static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target)
1248{ /* Informational Exceptions control mode page for mode_sense */
1249 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
1250 0, 0, 0x0, 0x0};
1251 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1252 0, 0, 0x0, 0x0};
1253
1254 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
1255 if (1 == pcontrol)
1256 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
1257 else if (2 == pcontrol)
1258 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
1259 return sizeof(iec_m_pg);
1260}
1261
1262static int resp_sas_sf_m_pg(unsigned char * p, int pcontrol, int target)
1263{ /* SAS SSP mode page - short format for mode_sense */
1264 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
1265 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
1266
1267 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
1268 if (1 == pcontrol)
1269 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
1270 return sizeof(sas_sf_m_pg);
1271}
1272
1273
1274static int resp_sas_pcd_m_spg(unsigned char * p, int pcontrol, int target,
1275 int target_dev_id)
1276{ /* SAS phy control and discover mode page for mode_sense */
1277 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
1278 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
1279 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1280 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1281 0x2, 0, 0, 0, 0, 0, 0, 0,
1282 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1283 0, 0, 0, 0, 0, 0, 0, 0,
1284 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
1285 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1286 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1287 0x3, 0, 0, 0, 0, 0, 0, 0,
1288 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1289 0, 0, 0, 0, 0, 0, 0, 0,
1290 };
1291 int port_a, port_b;
1292
1293 port_a = target_dev_id + 1;
1294 port_b = port_a + 1;
1295 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
1296 p[20] = (port_a >> 24);
1297 p[21] = (port_a >> 16) & 0xff;
1298 p[22] = (port_a >> 8) & 0xff;
1299 p[23] = port_a & 0xff;
1300 p[48 + 20] = (port_b >> 24);
1301 p[48 + 21] = (port_b >> 16) & 0xff;
1302 p[48 + 22] = (port_b >> 8) & 0xff;
1303 p[48 + 23] = port_b & 0xff;
1304 if (1 == pcontrol)
1305 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
1306 return sizeof(sas_pcd_m_pg);
1307}
1308
1309static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol)
1310{ /* SAS SSP shared protocol specific port mode subpage */
1311 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
1312 0, 0, 0, 0, 0, 0, 0, 0,
1313 };
1314
1315 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
1316 if (1 == pcontrol)
1317 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
1318 return sizeof(sas_sha_m_pg);
1319}
1320
1321#define SDEBUG_MAX_MSENSE_SZ 256
1322
1323static int resp_mode_sense(struct scsi_cmnd * scp, int target,
1324 struct sdebug_dev_info * devip)
1325{
1326 unsigned char dbd, llbaa;
1327 int pcontrol, pcode, subpcode, bd_len;
1328 unsigned char dev_spec;
1329 int k, alloc_len, msense_6, offset, len, errsts, target_dev_id;
1330 unsigned char * ap;
1331 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
1332 unsigned char *cmd = (unsigned char *)scp->cmnd;
1333
1334 if ((errsts = check_readiness(scp, 1, devip)))
1335 return errsts;
1336 dbd = !!(cmd[1] & 0x8);
1337 pcontrol = (cmd[2] & 0xc0) >> 6;
1338 pcode = cmd[2] & 0x3f;
1339 subpcode = cmd[3];
1340 msense_6 = (MODE_SENSE == cmd[0]);
1341 llbaa = msense_6 ? 0 : !!(cmd[1] & 0x10);
1342 if ((0 == scsi_debug_ptype) && (0 == dbd))
1343 bd_len = llbaa ? 16 : 8;
1344 else
1345 bd_len = 0;
1346 alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]);
1347 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
1348 if (0x3 == pcontrol) { /* Saving values not supported */
1349 mk_sense_buffer(devip, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP,
1350 0);
1351 return check_condition_result;
1352 }
1353 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
1354 (devip->target * 1000) - 3;
1355 /* set DPOFUA bit for disks */
1356 if (0 == scsi_debug_ptype)
1357 dev_spec = (DEV_READONLY(target) ? 0x80 : 0x0) | 0x10;
1358 else
1359 dev_spec = 0x0;
1360 if (msense_6) {
1361 arr[2] = dev_spec;
1362 arr[3] = bd_len;
1363 offset = 4;
1364 } else {
1365 arr[3] = dev_spec;
1366 if (16 == bd_len)
1367 arr[4] = 0x1; /* set LONGLBA bit */
1368 arr[7] = bd_len; /* assume 255 or less */
1369 offset = 8;
1370 }
1371 ap = arr + offset;
1372 if ((bd_len > 0) && (!sdebug_capacity))
1373 sdebug_capacity = get_sdebug_capacity();
1374
1375 if (8 == bd_len) {
1376 if (sdebug_capacity > 0xfffffffe) {
1377 ap[0] = 0xff;
1378 ap[1] = 0xff;
1379 ap[2] = 0xff;
1380 ap[3] = 0xff;
1381 } else {
1382 ap[0] = (sdebug_capacity >> 24) & 0xff;
1383 ap[1] = (sdebug_capacity >> 16) & 0xff;
1384 ap[2] = (sdebug_capacity >> 8) & 0xff;
1385 ap[3] = sdebug_capacity & 0xff;
1386 }
1387 ap[6] = (scsi_debug_sector_size >> 8) & 0xff;
1388 ap[7] = scsi_debug_sector_size & 0xff;
1389 offset += bd_len;
1390 ap = arr + offset;
1391 } else if (16 == bd_len) {
1392 unsigned long long capac = sdebug_capacity;
1393
1394 for (k = 0; k < 8; ++k, capac >>= 8)
1395 ap[7 - k] = capac & 0xff;
1396 ap[12] = (scsi_debug_sector_size >> 24) & 0xff;
1397 ap[13] = (scsi_debug_sector_size >> 16) & 0xff;
1398 ap[14] = (scsi_debug_sector_size >> 8) & 0xff;
1399 ap[15] = scsi_debug_sector_size & 0xff;
1400 offset += bd_len;
1401 ap = arr + offset;
1402 }
1403
1404 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
1405 /* TODO: Control Extension page */
1406 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
1407 0);
1408 return check_condition_result;
1409 }
1410 switch (pcode) {
1411 case 0x1: /* Read-Write error recovery page, direct access */
1412 len = resp_err_recov_pg(ap, pcontrol, target);
1413 offset += len;
1414 break;
1415 case 0x2: /* Disconnect-Reconnect page, all devices */
1416 len = resp_disconnect_pg(ap, pcontrol, target);
1417 offset += len;
1418 break;
1419 case 0x3: /* Format device page, direct access */
1420 len = resp_format_pg(ap, pcontrol, target);
1421 offset += len;
1422 break;
1423 case 0x8: /* Caching page, direct access */
1424 len = resp_caching_pg(ap, pcontrol, target);
1425 offset += len;
1426 break;
1427 case 0xa: /* Control Mode page, all devices */
1428 len = resp_ctrl_m_pg(ap, pcontrol, target);
1429 offset += len;
1430 break;
1431 case 0x19: /* if spc==1 then sas phy, control+discover */
1432 if ((subpcode > 0x2) && (subpcode < 0xff)) {
1433 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1434 INVALID_FIELD_IN_CDB, 0);
1435 return check_condition_result;
1436 }
1437 len = 0;
1438 if ((0x0 == subpcode) || (0xff == subpcode))
1439 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
1440 if ((0x1 == subpcode) || (0xff == subpcode))
1441 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
1442 target_dev_id);
1443 if ((0x2 == subpcode) || (0xff == subpcode))
1444 len += resp_sas_sha_m_spg(ap + len, pcontrol);
1445 offset += len;
1446 break;
1447 case 0x1c: /* Informational Exceptions Mode page, all devices */
1448 len = resp_iec_m_pg(ap, pcontrol, target);
1449 offset += len;
1450 break;
1451 case 0x3f: /* Read all Mode pages */
1452 if ((0 == subpcode) || (0xff == subpcode)) {
1453 len = resp_err_recov_pg(ap, pcontrol, target);
1454 len += resp_disconnect_pg(ap + len, pcontrol, target);
1455 len += resp_format_pg(ap + len, pcontrol, target);
1456 len += resp_caching_pg(ap + len, pcontrol, target);
1457 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
1458 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
1459 if (0xff == subpcode) {
1460 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
1461 target, target_dev_id);
1462 len += resp_sas_sha_m_spg(ap + len, pcontrol);
1463 }
1464 len += resp_iec_m_pg(ap + len, pcontrol, target);
1465 } else {
1466 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1467 INVALID_FIELD_IN_CDB, 0);
1468 return check_condition_result;
1469 }
1470 offset += len;
1471 break;
1472 default:
1473 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
1474 0);
1475 return check_condition_result;
1476 }
1477 if (msense_6)
1478 arr[0] = offset - 1;
1479 else {
1480 arr[0] = ((offset - 2) >> 8) & 0xff;
1481 arr[1] = (offset - 2) & 0xff;
1482 }
1483 return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
1484}
1485
1486#define SDEBUG_MAX_MSELECT_SZ 512
1487
1488static int resp_mode_select(struct scsi_cmnd * scp, int mselect6,
1489 struct sdebug_dev_info * devip)
1490{
1491 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
1492 int param_len, res, errsts, mpage;
1493 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
1494 unsigned char *cmd = (unsigned char *)scp->cmnd;
1495
1496 if ((errsts = check_readiness(scp, 1, devip)))
1497 return errsts;
1498 memset(arr, 0, sizeof(arr));
1499 pf = cmd[1] & 0x10;
1500 sp = cmd[1] & 0x1;
1501 param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]);
1502 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
1503 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1504 INVALID_FIELD_IN_CDB, 0);
1505 return check_condition_result;
1506 }
1507 res = fetch_to_dev_buffer(scp, arr, param_len);
1508 if (-1 == res)
1509 return (DID_ERROR << 16);
1510 else if ((res < param_len) &&
1511 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
1512 printk(KERN_INFO "scsi_debug: mode_select: cdb indicated=%d, "
1513 " IO sent=%d bytes\n", param_len, res);
1514 md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2);
1515 bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]);
1516 if (md_len > 2) {
1517 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1518 INVALID_FIELD_IN_PARAM_LIST, 0);
1519 return check_condition_result;
1520 }
1521 off = bd_len + (mselect6 ? 4 : 8);
1522 mpage = arr[off] & 0x3f;
1523 ps = !!(arr[off] & 0x80);
1524 if (ps) {
1525 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1526 INVALID_FIELD_IN_PARAM_LIST, 0);
1527 return check_condition_result;
1528 }
1529 spf = !!(arr[off] & 0x40);
1530 pg_len = spf ? ((arr[off + 2] << 8) + arr[off + 3] + 4) :
1531 (arr[off + 1] + 2);
1532 if ((pg_len + off) > param_len) {
1533 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1534 PARAMETER_LIST_LENGTH_ERR, 0);
1535 return check_condition_result;
1536 }
1537 switch (mpage) {
1538 case 0xa: /* Control Mode page */
1539 if (ctrl_m_pg[1] == arr[off + 1]) {
1540 memcpy(ctrl_m_pg + 2, arr + off + 2,
1541 sizeof(ctrl_m_pg) - 2);
1542 scsi_debug_dsense = !!(ctrl_m_pg[2] & 0x4);
1543 return 0;
1544 }
1545 break;
1546 case 0x1c: /* Informational Exceptions Mode page */
1547 if (iec_m_pg[1] == arr[off + 1]) {
1548 memcpy(iec_m_pg + 2, arr + off + 2,
1549 sizeof(iec_m_pg) - 2);
1550 return 0;
1551 }
1552 break;
1553 default:
1554 break;
1555 }
1556 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1557 INVALID_FIELD_IN_PARAM_LIST, 0);
1558 return check_condition_result;
1559}
1560
1561static int resp_temp_l_pg(unsigned char * arr)
1562{
1563 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
1564 0x0, 0x1, 0x3, 0x2, 0x0, 65,
1565 };
1566
1567 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
1568 return sizeof(temp_l_pg);
1569}
1570
1571static int resp_ie_l_pg(unsigned char * arr)
1572{
1573 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
1574 };
1575
1576 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
1577 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
1578 arr[4] = THRESHOLD_EXCEEDED;
1579 arr[5] = 0xff;
1580 }
1581 return sizeof(ie_l_pg);
1582}
1583
1584#define SDEBUG_MAX_LSENSE_SZ 512
1585
1586static int resp_log_sense(struct scsi_cmnd * scp,
1587 struct sdebug_dev_info * devip)
1588{
1589 int ppc, sp, pcontrol, pcode, subpcode, alloc_len, errsts, len, n;
1590 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
1591 unsigned char *cmd = (unsigned char *)scp->cmnd;
1592
1593 if ((errsts = check_readiness(scp, 1, devip)))
1594 return errsts;
1595 memset(arr, 0, sizeof(arr));
1596 ppc = cmd[1] & 0x2;
1597 sp = cmd[1] & 0x1;
1598 if (ppc || sp) {
1599 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1600 INVALID_FIELD_IN_CDB, 0);
1601 return check_condition_result;
1602 }
1603 pcontrol = (cmd[2] & 0xc0) >> 6;
1604 pcode = cmd[2] & 0x3f;
1605 subpcode = cmd[3] & 0xff;
1606 alloc_len = (cmd[7] << 8) + cmd[8];
1607 arr[0] = pcode;
1608 if (0 == subpcode) {
1609 switch (pcode) {
1610 case 0x0: /* Supported log pages log page */
1611 n = 4;
1612 arr[n++] = 0x0; /* this page */
1613 arr[n++] = 0xd; /* Temperature */
1614 arr[n++] = 0x2f; /* Informational exceptions */
1615 arr[3] = n - 4;
1616 break;
1617 case 0xd: /* Temperature log page */
1618 arr[3] = resp_temp_l_pg(arr + 4);
1619 break;
1620 case 0x2f: /* Informational exceptions log page */
1621 arr[3] = resp_ie_l_pg(arr + 4);
1622 break;
1623 default:
1624 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1625 INVALID_FIELD_IN_CDB, 0);
1626 return check_condition_result;
1627 }
1628 } else if (0xff == subpcode) {
1629 arr[0] |= 0x40;
1630 arr[1] = subpcode;
1631 switch (pcode) {
1632 case 0x0: /* Supported log pages and subpages log page */
1633 n = 4;
1634 arr[n++] = 0x0;
1635 arr[n++] = 0x0; /* 0,0 page */
1636 arr[n++] = 0x0;
1637 arr[n++] = 0xff; /* this page */
1638 arr[n++] = 0xd;
1639 arr[n++] = 0x0; /* Temperature */
1640 arr[n++] = 0x2f;
1641 arr[n++] = 0x0; /* Informational exceptions */
1642 arr[3] = n - 4;
1643 break;
1644 case 0xd: /* Temperature subpages */
1645 n = 4;
1646 arr[n++] = 0xd;
1647 arr[n++] = 0x0; /* Temperature */
1648 arr[3] = n - 4;
1649 break;
1650 case 0x2f: /* Informational exceptions subpages */
1651 n = 4;
1652 arr[n++] = 0x2f;
1653 arr[n++] = 0x0; /* Informational exceptions */
1654 arr[3] = n - 4;
1655 break;
1656 default:
1657 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1658 INVALID_FIELD_IN_CDB, 0);
1659 return check_condition_result;
1660 }
1661 } else {
1662 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1663 INVALID_FIELD_IN_CDB, 0);
1664 return check_condition_result;
1665 }
1666 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
1667 return fill_from_dev_buffer(scp, arr,
1668 min(len, SDEBUG_MAX_INQ_ARR_SZ));
1669}
1670
1671static int check_device_access_params(struct sdebug_dev_info *devi,
1672 unsigned long long lba, unsigned int num)
1673{
1674 if (lba + num > sdebug_capacity) {
1675 mk_sense_buffer(devi, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE, 0);
1676 return check_condition_result;
1677 }
1678 /* transfer length excessive (tie in to block limits VPD page) */
1679 if (num > sdebug_store_sectors) {
1680 mk_sense_buffer(devi, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
1681 return check_condition_result;
1682 }
1683 return 0;
1684}
1685
1686static int do_device_access(struct scsi_cmnd *scmd,
1687 struct sdebug_dev_info *devi,
1688 unsigned long long lba, unsigned int num, int write)
1689{
1690 int ret;
1691 unsigned long long block, rest = 0;
1692 int (*func)(struct scsi_cmnd *, unsigned char *, int);
1693
1694 func = write ? fetch_to_dev_buffer : fill_from_dev_buffer;
1695
1696 block = do_div(lba, sdebug_store_sectors);
1697 if (block + num > sdebug_store_sectors)
1698 rest = block + num - sdebug_store_sectors;
1699
1700 ret = func(scmd, fake_storep + (block * scsi_debug_sector_size),
1701 (num - rest) * scsi_debug_sector_size);
1702 if (!ret && rest)
1703 ret = func(scmd, fake_storep, rest * scsi_debug_sector_size);
1704
1705 return ret;
1706}
1707
1708static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
1709 unsigned int sectors, u32 ei_lba)
1710{
1711 unsigned int i, resid;
1712 struct scatterlist *psgl;
1713 struct sd_dif_tuple *sdt;
1714 sector_t sector;
1715 sector_t tmp_sec = start_sec;
1716 void *paddr;
1717
1718 start_sec = do_div(tmp_sec, sdebug_store_sectors);
1719
1720 sdt = (struct sd_dif_tuple *)(dif_storep + dif_offset(start_sec));
1721
1722 for (i = 0 ; i < sectors ; i++) {
1723 u16 csum;
1724
1725 if (sdt[i].app_tag == 0xffff)
1726 continue;
1727
1728 sector = start_sec + i;
1729
1730 switch (scsi_debug_guard) {
1731 case 1:
1732 csum = ip_compute_csum(fake_storep +
1733 sector * scsi_debug_sector_size,
1734 scsi_debug_sector_size);
1735 break;
1736 case 0:
1737 csum = crc_t10dif(fake_storep +
1738 sector * scsi_debug_sector_size,
1739 scsi_debug_sector_size);
1740 csum = cpu_to_be16(csum);
1741 break;
1742 default:
1743 BUG();
1744 }
1745
1746 if (sdt[i].guard_tag != csum) {
1747 printk(KERN_ERR "%s: GUARD check failed on sector %lu" \
1748 " rcvd 0x%04x, data 0x%04x\n", __func__,
1749 (unsigned long)sector,
1750 be16_to_cpu(sdt[i].guard_tag),
1751 be16_to_cpu(csum));
1752 dif_errors++;
1753 return 0x01;
1754 }
1755
1756 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION &&
1757 be32_to_cpu(sdt[i].ref_tag) != (sector & 0xffffffff)) {
1758 printk(KERN_ERR "%s: REF check failed on sector %lu\n",
1759 __func__, (unsigned long)sector);
1760 dif_errors++;
1761 return 0x03;
1762 }
1763
1764 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
1765 be32_to_cpu(sdt[i].ref_tag) != ei_lba) {
1766 printk(KERN_ERR "%s: REF check failed on sector %lu\n",
1767 __func__, (unsigned long)sector);
1768 dif_errors++;
1769 return 0x03;
1770 }
1771
1772 ei_lba++;
1773 }
1774
1775 resid = sectors * 8; /* Bytes of protection data to copy into sgl */
1776 sector = start_sec;
1777
1778 scsi_for_each_prot_sg(SCpnt, psgl, scsi_prot_sg_count(SCpnt), i) {
1779 int len = min(psgl->length, resid);
1780
1781 paddr = kmap_atomic(sg_page(psgl), KM_IRQ0) + psgl->offset;
1782 memcpy(paddr, dif_storep + dif_offset(sector), len);
1783
1784 sector += len >> 3;
1785 if (sector >= sdebug_store_sectors) {
1786 /* Force wrap */
1787 tmp_sec = sector;
1788 sector = do_div(tmp_sec, sdebug_store_sectors);
1789 }
1790 resid -= len;
1791 kunmap_atomic(paddr, KM_IRQ0);
1792 }
1793
1794 dix_reads++;
1795
1796 return 0;
1797}
1798
1799static int resp_read(struct scsi_cmnd *SCpnt, unsigned long long lba,
1800 unsigned int num, struct sdebug_dev_info *devip,
1801 u32 ei_lba)
1802{
1803 unsigned long iflags;
1804 int ret;
1805
1806 ret = check_device_access_params(devip, lba, num);
1807 if (ret)
1808 return ret;
1809
1810 if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) &&
1811 (lba <= (OPT_MEDIUM_ERR_ADDR + OPT_MEDIUM_ERR_NUM - 1)) &&
1812 ((lba + num) > OPT_MEDIUM_ERR_ADDR)) {
1813 /* claim unrecoverable read error */
1814 mk_sense_buffer(devip, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
1815 /* set info field and valid bit for fixed descriptor */
1816 if (0x70 == (devip->sense_buff[0] & 0x7f)) {
1817 devip->sense_buff[0] |= 0x80; /* Valid bit */
1818 ret = (lba < OPT_MEDIUM_ERR_ADDR)
1819 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
1820 devip->sense_buff[3] = (ret >> 24) & 0xff;
1821 devip->sense_buff[4] = (ret >> 16) & 0xff;
1822 devip->sense_buff[5] = (ret >> 8) & 0xff;
1823 devip->sense_buff[6] = ret & 0xff;
1824 }
1825 scsi_set_resid(SCpnt, scsi_bufflen(SCpnt));
1826 return check_condition_result;
1827 }
1828
1829 /* DIX + T10 DIF */
1830 if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
1831 int prot_ret = prot_verify_read(SCpnt, lba, num, ei_lba);
1832
1833 if (prot_ret) {
1834 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, prot_ret);
1835 return illegal_condition_result;
1836 }
1837 }
1838
1839 read_lock_irqsave(&atomic_rw, iflags);
1840 ret = do_device_access(SCpnt, devip, lba, num, 0);
1841 read_unlock_irqrestore(&atomic_rw, iflags);
1842 return ret;
1843}
1844
1845void dump_sector(unsigned char *buf, int len)
1846{
1847 int i, j;
1848
1849 printk(KERN_ERR ">>> Sector Dump <<<\n");
1850
1851 for (i = 0 ; i < len ; i += 16) {
1852 printk(KERN_ERR "%04d: ", i);
1853
1854 for (j = 0 ; j < 16 ; j++) {
1855 unsigned char c = buf[i+j];
1856 if (c >= 0x20 && c < 0x7e)
1857 printk(" %c ", buf[i+j]);
1858 else
1859 printk("%02x ", buf[i+j]);
1860 }
1861
1862 printk("\n");
1863 }
1864}
1865
1866static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
1867 unsigned int sectors, u32 ei_lba)
1868{
1869 int i, j, ret;
1870 struct sd_dif_tuple *sdt;
1871 struct scatterlist *dsgl = scsi_sglist(SCpnt);
1872 struct scatterlist *psgl = scsi_prot_sglist(SCpnt);
1873 void *daddr, *paddr;
1874 sector_t tmp_sec = start_sec;
1875 sector_t sector;
1876 int ppage_offset;
1877 unsigned short csum;
1878
1879 sector = do_div(tmp_sec, sdebug_store_sectors);
1880
1881 BUG_ON(scsi_sg_count(SCpnt) == 0);
1882 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
1883
1884 paddr = kmap_atomic(sg_page(psgl), KM_IRQ1) + psgl->offset;
1885 ppage_offset = 0;
1886
1887 /* For each data page */
1888 scsi_for_each_sg(SCpnt, dsgl, scsi_sg_count(SCpnt), i) {
1889 daddr = kmap_atomic(sg_page(dsgl), KM_IRQ0) + dsgl->offset;
1890
1891 /* For each sector-sized chunk in data page */
1892 for (j = 0 ; j < dsgl->length ; j += scsi_debug_sector_size) {
1893
1894 /* If we're at the end of the current
1895 * protection page advance to the next one
1896 */
1897 if (ppage_offset >= psgl->length) {
1898 kunmap_atomic(paddr, KM_IRQ1);
1899 psgl = sg_next(psgl);
1900 BUG_ON(psgl == NULL);
1901 paddr = kmap_atomic(sg_page(psgl), KM_IRQ1)
1902 + psgl->offset;
1903 ppage_offset = 0;
1904 }
1905
1906 sdt = paddr + ppage_offset;
1907
1908 switch (scsi_debug_guard) {
1909 case 1:
1910 csum = ip_compute_csum(daddr,
1911 scsi_debug_sector_size);
1912 break;
1913 case 0:
1914 csum = cpu_to_be16(crc_t10dif(daddr,
1915 scsi_debug_sector_size));
1916 break;
1917 default:
1918 BUG();
1919 ret = 0;
1920 goto out;
1921 }
1922
1923 if (sdt->guard_tag != csum) {
1924 printk(KERN_ERR
1925 "%s: GUARD check failed on sector %lu " \
1926 "rcvd 0x%04x, calculated 0x%04x\n",
1927 __func__, (unsigned long)sector,
1928 be16_to_cpu(sdt->guard_tag),
1929 be16_to_cpu(csum));
1930 ret = 0x01;
1931 dump_sector(daddr, scsi_debug_sector_size);
1932 goto out;
1933 }
1934
1935 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION &&
1936 be32_to_cpu(sdt->ref_tag)
1937 != (start_sec & 0xffffffff)) {
1938 printk(KERN_ERR
1939 "%s: REF check failed on sector %lu\n",
1940 __func__, (unsigned long)sector);
1941 ret = 0x03;
1942 dump_sector(daddr, scsi_debug_sector_size);
1943 goto out;
1944 }
1945
1946 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
1947 be32_to_cpu(sdt->ref_tag) != ei_lba) {
1948 printk(KERN_ERR
1949 "%s: REF check failed on sector %lu\n",
1950 __func__, (unsigned long)sector);
1951 ret = 0x03;
1952 dump_sector(daddr, scsi_debug_sector_size);
1953 goto out;
1954 }
1955
1956 /* Would be great to copy this in bigger
1957 * chunks. However, for the sake of
1958 * correctness we need to verify each sector
1959 * before writing it to "stable" storage
1960 */
1961 memcpy(dif_storep + dif_offset(sector), sdt, 8);
1962
1963 sector++;
1964
1965 if (sector == sdebug_store_sectors)
1966 sector = 0; /* Force wrap */
1967
1968 start_sec++;
1969 ei_lba++;
1970 daddr += scsi_debug_sector_size;
1971 ppage_offset += sizeof(struct sd_dif_tuple);
1972 }
1973
1974 kunmap_atomic(daddr, KM_IRQ0);
1975 }
1976
1977 kunmap_atomic(paddr, KM_IRQ1);
1978
1979 dix_writes++;
1980
1981 return 0;
1982
1983out:
1984 dif_errors++;
1985 kunmap_atomic(daddr, KM_IRQ0);
1986 kunmap_atomic(paddr, KM_IRQ1);
1987 return ret;
1988}
1989
1990static unsigned int map_state(sector_t lba, unsigned int *num)
1991{
1992 unsigned int granularity, alignment, mapped;
1993 sector_t block, next, end;
1994
1995 granularity = scsi_debug_unmap_granularity;
1996 alignment = granularity - scsi_debug_unmap_alignment;
1997 block = lba + alignment;
1998 do_div(block, granularity);
1999
2000 mapped = test_bit(block, map_storep);
2001
2002 if (mapped)
2003 next = find_next_zero_bit(map_storep, map_size, block);
2004 else
2005 next = find_next_bit(map_storep, map_size, block);
2006
2007 end = next * granularity - scsi_debug_unmap_alignment;
2008 *num = end - lba;
2009
2010 return mapped;
2011}
2012
2013static void map_region(sector_t lba, unsigned int len)
2014{
2015 unsigned int granularity, alignment;
2016 sector_t end = lba + len;
2017
2018 granularity = scsi_debug_unmap_granularity;
2019 alignment = granularity - scsi_debug_unmap_alignment;
2020
2021 while (lba < end) {
2022 sector_t block, rem;
2023
2024 block = lba + alignment;
2025 rem = do_div(block, granularity);
2026
2027 if (block < map_size)
2028 set_bit(block, map_storep);
2029
2030 lba += granularity - rem;
2031 }
2032}
2033
2034static void unmap_region(sector_t lba, unsigned int len)
2035{
2036 unsigned int granularity, alignment;
2037 sector_t end = lba + len;
2038
2039 granularity = scsi_debug_unmap_granularity;
2040 alignment = granularity - scsi_debug_unmap_alignment;
2041
2042 while (lba < end) {
2043 sector_t block, rem;
2044
2045 block = lba + alignment;
2046 rem = do_div(block, granularity);
2047
2048 if (rem == 0 && lba + granularity <= end &&
2049 block < map_size)
2050 clear_bit(block, map_storep);
2051
2052 lba += granularity - rem;
2053 }
2054}
2055
2056static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba,
2057 unsigned int num, struct sdebug_dev_info *devip,
2058 u32 ei_lba)
2059{
2060 unsigned long iflags;
2061 int ret;
2062
2063 ret = check_device_access_params(devip, lba, num);
2064 if (ret)
2065 return ret;
2066
2067 /* DIX + T10 DIF */
2068 if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
2069 int prot_ret = prot_verify_write(SCpnt, lba, num, ei_lba);
2070
2071 if (prot_ret) {
2072 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, prot_ret);
2073 return illegal_condition_result;
2074 }
2075 }
2076
2077 write_lock_irqsave(&atomic_rw, iflags);
2078 ret = do_device_access(SCpnt, devip, lba, num, 1);
2079 if (scsi_debug_unmap_granularity)
2080 map_region(lba, num);
2081 write_unlock_irqrestore(&atomic_rw, iflags);
2082 if (-1 == ret)
2083 return (DID_ERROR << 16);
2084 else if ((ret < (num * scsi_debug_sector_size)) &&
2085 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2086 printk(KERN_INFO "scsi_debug: write: cdb indicated=%u, "
2087 " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret);
2088
2089 return 0;
2090}
2091
2092static int resp_write_same(struct scsi_cmnd *scmd, unsigned long long lba,
2093 unsigned int num, struct sdebug_dev_info *devip,
2094 u32 ei_lba, unsigned int unmap)
2095{
2096 unsigned long iflags;
2097 unsigned long long i;
2098 int ret;
2099
2100 ret = check_device_access_params(devip, lba, num);
2101 if (ret)
2102 return ret;
2103
2104 if (num > scsi_debug_write_same_length) {
2105 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
2106 0);
2107 return check_condition_result;
2108 }
2109
2110 write_lock_irqsave(&atomic_rw, iflags);
2111
2112 if (unmap && scsi_debug_unmap_granularity) {
2113 unmap_region(lba, num);
2114 goto out;
2115 }
2116
2117 /* Else fetch one logical block */
2118 ret = fetch_to_dev_buffer(scmd,
2119 fake_storep + (lba * scsi_debug_sector_size),
2120 scsi_debug_sector_size);
2121
2122 if (-1 == ret) {
2123 write_unlock_irqrestore(&atomic_rw, iflags);
2124 return (DID_ERROR << 16);
2125 } else if ((ret < (num * scsi_debug_sector_size)) &&
2126 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2127 printk(KERN_INFO "scsi_debug: write same: cdb indicated=%u, "
2128 " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret);
2129
2130 /* Copy first sector to remaining blocks */
2131 for (i = 1 ; i < num ; i++)
2132 memcpy(fake_storep + ((lba + i) * scsi_debug_sector_size),
2133 fake_storep + (lba * scsi_debug_sector_size),
2134 scsi_debug_sector_size);
2135
2136 if (scsi_debug_unmap_granularity)
2137 map_region(lba, num);
2138out:
2139 write_unlock_irqrestore(&atomic_rw, iflags);
2140
2141 return 0;
2142}
2143
2144struct unmap_block_desc {
2145 __be64 lba;
2146 __be32 blocks;
2147 __be32 __reserved;
2148};
2149
2150static int resp_unmap(struct scsi_cmnd * scmd, struct sdebug_dev_info * devip)
2151{
2152 unsigned char *buf;
2153 struct unmap_block_desc *desc;
2154 unsigned int i, payload_len, descriptors;
2155 int ret;
2156
2157 ret = check_readiness(scmd, 1, devip);
2158 if (ret)
2159 return ret;
2160
2161 payload_len = get_unaligned_be16(&scmd->cmnd[7]);
2162 BUG_ON(scsi_bufflen(scmd) != payload_len);
2163
2164 descriptors = (payload_len - 8) / 16;
2165
2166 buf = kmalloc(scsi_bufflen(scmd), GFP_ATOMIC);
2167 if (!buf)
2168 return check_condition_result;
2169
2170 scsi_sg_copy_to_buffer(scmd, buf, scsi_bufflen(scmd));
2171
2172 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
2173 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
2174
2175 desc = (void *)&buf[8];
2176
2177 for (i = 0 ; i < descriptors ; i++) {
2178 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
2179 unsigned int num = get_unaligned_be32(&desc[i].blocks);
2180
2181 ret = check_device_access_params(devip, lba, num);
2182 if (ret)
2183 goto out;
2184
2185 unmap_region(lba, num);
2186 }
2187
2188 ret = 0;
2189
2190out:
2191 kfree(buf);
2192
2193 return ret;
2194}
2195
2196#define SDEBUG_GET_LBA_STATUS_LEN 32
2197
2198static int resp_get_lba_status(struct scsi_cmnd * scmd,
2199 struct sdebug_dev_info * devip)
2200{
2201 unsigned long long lba;
2202 unsigned int alloc_len, mapped, num;
2203 unsigned char arr[SDEBUG_GET_LBA_STATUS_LEN];
2204 int ret;
2205
2206 ret = check_readiness(scmd, 1, devip);
2207 if (ret)
2208 return ret;
2209
2210 lba = get_unaligned_be64(&scmd->cmnd[2]);
2211 alloc_len = get_unaligned_be32(&scmd->cmnd[10]);
2212
2213 if (alloc_len < 24)
2214 return 0;
2215
2216 ret = check_device_access_params(devip, lba, 1);
2217 if (ret)
2218 return ret;
2219
2220 mapped = map_state(lba, &num);
2221
2222 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
2223 put_unaligned_be32(16, &arr[0]); /* Parameter Data Length */
2224 put_unaligned_be64(lba, &arr[8]); /* LBA */
2225 put_unaligned_be32(num, &arr[16]); /* Number of blocks */
2226 arr[20] = !mapped; /* mapped = 0, unmapped = 1 */
2227
2228 return fill_from_dev_buffer(scmd, arr, SDEBUG_GET_LBA_STATUS_LEN);
2229}
2230
2231#define SDEBUG_RLUN_ARR_SZ 256
2232
2233static int resp_report_luns(struct scsi_cmnd * scp,
2234 struct sdebug_dev_info * devip)
2235{
2236 unsigned int alloc_len;
2237 int lun_cnt, i, upper, num, n, wlun, lun;
2238 unsigned char *cmd = (unsigned char *)scp->cmnd;
2239 int select_report = (int)cmd[2];
2240 struct scsi_lun *one_lun;
2241 unsigned char arr[SDEBUG_RLUN_ARR_SZ];
2242 unsigned char * max_addr;
2243
2244 alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
2245 if ((alloc_len < 4) || (select_report > 2)) {
2246 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
2247 0);
2248 return check_condition_result;
2249 }
2250 /* can produce response with up to 16k luns (lun 0 to lun 16383) */
2251 memset(arr, 0, SDEBUG_RLUN_ARR_SZ);
2252 lun_cnt = scsi_debug_max_luns;
2253 if (1 == select_report)
2254 lun_cnt = 0;
2255 else if (scsi_debug_no_lun_0 && (lun_cnt > 0))
2256 --lun_cnt;
2257 wlun = (select_report > 0) ? 1 : 0;
2258 num = lun_cnt + wlun;
2259 arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff;
2260 arr[3] = (sizeof(struct scsi_lun) * num) & 0xff;
2261 n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) /
2262 sizeof(struct scsi_lun)), num);
2263 if (n < num) {
2264 wlun = 0;
2265 lun_cnt = n;
2266 }
2267 one_lun = (struct scsi_lun *) &arr[8];
2268 max_addr = arr + SDEBUG_RLUN_ARR_SZ;
2269 for (i = 0, lun = (scsi_debug_no_lun_0 ? 1 : 0);
2270 ((i < lun_cnt) && ((unsigned char *)(one_lun + i) < max_addr));
2271 i++, lun++) {
2272 upper = (lun >> 8) & 0x3f;
2273 if (upper)
2274 one_lun[i].scsi_lun[0] =
2275 (upper | (SAM2_LUN_ADDRESS_METHOD << 6));
2276 one_lun[i].scsi_lun[1] = lun & 0xff;
2277 }
2278 if (wlun) {
2279 one_lun[i].scsi_lun[0] = (SAM2_WLUN_REPORT_LUNS >> 8) & 0xff;
2280 one_lun[i].scsi_lun[1] = SAM2_WLUN_REPORT_LUNS & 0xff;
2281 i++;
2282 }
2283 alloc_len = (unsigned char *)(one_lun + i) - arr;
2284 return fill_from_dev_buffer(scp, arr,
2285 min((int)alloc_len, SDEBUG_RLUN_ARR_SZ));
2286}
2287
2288static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
2289 unsigned int num, struct sdebug_dev_info *devip)
2290{
2291 int i, j, ret = -1;
2292 unsigned char *kaddr, *buf;
2293 unsigned int offset;
2294 struct scatterlist *sg;
2295 struct scsi_data_buffer *sdb = scsi_in(scp);
2296
2297 /* better not to use temporary buffer. */
2298 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
2299 if (!buf)
2300 return ret;
2301
2302 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
2303
2304 offset = 0;
2305 for_each_sg(sdb->table.sgl, sg, sdb->table.nents, i) {
2306 kaddr = (unsigned char *)kmap_atomic(sg_page(sg), KM_USER0);
2307 if (!kaddr)
2308 goto out;
2309
2310 for (j = 0; j < sg->length; j++)
2311 *(kaddr + sg->offset + j) ^= *(buf + offset + j);
2312
2313 offset += sg->length;
2314 kunmap_atomic(kaddr, KM_USER0);
2315 }
2316 ret = 0;
2317out:
2318 kfree(buf);
2319
2320 return ret;
2321}
2322
2323/* When timer goes off this function is called. */
2324static void timer_intr_handler(unsigned long indx)
2325{
2326 struct sdebug_queued_cmd * sqcp;
2327 unsigned long iflags;
2328
2329 if (indx >= scsi_debug_max_queue) {
2330 printk(KERN_ERR "scsi_debug:timer_intr_handler: indx too "
2331 "large\n");
2332 return;
2333 }
2334 spin_lock_irqsave(&queued_arr_lock, iflags);
2335 sqcp = &queued_arr[(int)indx];
2336 if (! sqcp->in_use) {
2337 printk(KERN_ERR "scsi_debug:timer_intr_handler: Unexpected "
2338 "interrupt\n");
2339 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2340 return;
2341 }
2342 sqcp->in_use = 0;
2343 if (sqcp->done_funct) {
2344 sqcp->a_cmnd->result = sqcp->scsi_result;
2345 sqcp->done_funct(sqcp->a_cmnd); /* callback to mid level */
2346 }
2347 sqcp->done_funct = NULL;
2348 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2349}
2350
2351
2352static struct sdebug_dev_info *
2353sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags)
2354{
2355 struct sdebug_dev_info *devip;
2356
2357 devip = kzalloc(sizeof(*devip), flags);
2358 if (devip) {
2359 devip->sdbg_host = sdbg_host;
2360 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
2361 }
2362 return devip;
2363}
2364
2365static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev)
2366{
2367 struct sdebug_host_info * sdbg_host;
2368 struct sdebug_dev_info * open_devip = NULL;
2369 struct sdebug_dev_info * devip =
2370 (struct sdebug_dev_info *)sdev->hostdata;
2371
2372 if (devip)
2373 return devip;
2374 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
2375 if (!sdbg_host) {
2376 printk(KERN_ERR "Host info NULL\n");
2377 return NULL;
2378 }
2379 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
2380 if ((devip->used) && (devip->channel == sdev->channel) &&
2381 (devip->target == sdev->id) &&
2382 (devip->lun == sdev->lun))
2383 return devip;
2384 else {
2385 if ((!devip->used) && (!open_devip))
2386 open_devip = devip;
2387 }
2388 }
2389 if (!open_devip) { /* try and make a new one */
2390 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
2391 if (!open_devip) {
2392 printk(KERN_ERR "%s: out of memory at line %d\n",
2393 __func__, __LINE__);
2394 return NULL;
2395 }
2396 }
2397
2398 open_devip->channel = sdev->channel;
2399 open_devip->target = sdev->id;
2400 open_devip->lun = sdev->lun;
2401 open_devip->sdbg_host = sdbg_host;
2402 open_devip->reset = 1;
2403 open_devip->used = 1;
2404 memset(open_devip->sense_buff, 0, SDEBUG_SENSE_LEN);
2405 if (scsi_debug_dsense)
2406 open_devip->sense_buff[0] = 0x72;
2407 else {
2408 open_devip->sense_buff[0] = 0x70;
2409 open_devip->sense_buff[7] = 0xa;
2410 }
2411 if (sdev->lun == SAM2_WLUN_REPORT_LUNS)
2412 open_devip->wlun = SAM2_WLUN_REPORT_LUNS & 0xff;
2413
2414 return open_devip;
2415}
2416
2417static int scsi_debug_slave_alloc(struct scsi_device *sdp)
2418{
2419 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2420 printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %u>\n",
2421 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
2422 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue);
2423 return 0;
2424}
2425
2426static int scsi_debug_slave_configure(struct scsi_device *sdp)
2427{
2428 struct sdebug_dev_info *devip;
2429
2430 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2431 printk(KERN_INFO "scsi_debug: slave_configure <%u %u %u %u>\n",
2432 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
2433 if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN)
2434 sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN;
2435 devip = devInfoReg(sdp);
2436 if (NULL == devip)
2437 return 1; /* no resources, will be marked offline */
2438 sdp->hostdata = devip;
2439 if (sdp->host->cmd_per_lun)
2440 scsi_adjust_queue_depth(sdp, SDEBUG_TAGGED_QUEUING,
2441 sdp->host->cmd_per_lun);
2442 blk_queue_max_segment_size(sdp->request_queue, 256 * 1024);
2443 if (scsi_debug_no_uld)
2444 sdp->no_uld_attach = 1;
2445 return 0;
2446}
2447
2448static void scsi_debug_slave_destroy(struct scsi_device *sdp)
2449{
2450 struct sdebug_dev_info *devip =
2451 (struct sdebug_dev_info *)sdp->hostdata;
2452
2453 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2454 printk(KERN_INFO "scsi_debug: slave_destroy <%u %u %u %u>\n",
2455 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
2456 if (devip) {
2457 /* make this slot available for re-use */
2458 devip->used = 0;
2459 sdp->hostdata = NULL;
2460 }
2461}
2462
2463/* Returns 1 if found 'cmnd' and deleted its timer. else returns 0 */
2464static int stop_queued_cmnd(struct scsi_cmnd *cmnd)
2465{
2466 unsigned long iflags;
2467 int k;
2468 struct sdebug_queued_cmd *sqcp;
2469
2470 spin_lock_irqsave(&queued_arr_lock, iflags);
2471 for (k = 0; k < scsi_debug_max_queue; ++k) {
2472 sqcp = &queued_arr[k];
2473 if (sqcp->in_use && (cmnd == sqcp->a_cmnd)) {
2474 del_timer_sync(&sqcp->cmnd_timer);
2475 sqcp->in_use = 0;
2476 sqcp->a_cmnd = NULL;
2477 break;
2478 }
2479 }
2480 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2481 return (k < scsi_debug_max_queue) ? 1 : 0;
2482}
2483
2484/* Deletes (stops) timers of all queued commands */
2485static void stop_all_queued(void)
2486{
2487 unsigned long iflags;
2488 int k;
2489 struct sdebug_queued_cmd *sqcp;
2490
2491 spin_lock_irqsave(&queued_arr_lock, iflags);
2492 for (k = 0; k < scsi_debug_max_queue; ++k) {
2493 sqcp = &queued_arr[k];
2494 if (sqcp->in_use && sqcp->a_cmnd) {
2495 del_timer_sync(&sqcp->cmnd_timer);
2496 sqcp->in_use = 0;
2497 sqcp->a_cmnd = NULL;
2498 }
2499 }
2500 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2501}
2502
2503static int scsi_debug_abort(struct scsi_cmnd * SCpnt)
2504{
2505 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2506 printk(KERN_INFO "scsi_debug: abort\n");
2507 ++num_aborts;
2508 stop_queued_cmnd(SCpnt);
2509 return SUCCESS;
2510}
2511
2512static int scsi_debug_biosparam(struct scsi_device *sdev,
2513 struct block_device * bdev, sector_t capacity, int *info)
2514{
2515 int res;
2516 unsigned char *buf;
2517
2518 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2519 printk(KERN_INFO "scsi_debug: biosparam\n");
2520 buf = scsi_bios_ptable(bdev);
2521 if (buf) {
2522 res = scsi_partsize(buf, capacity,
2523 &info[2], &info[0], &info[1]);
2524 kfree(buf);
2525 if (! res)
2526 return res;
2527 }
2528 info[0] = sdebug_heads;
2529 info[1] = sdebug_sectors_per;
2530 info[2] = sdebug_cylinders_per;
2531 return 0;
2532}
2533
2534static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
2535{
2536 struct sdebug_dev_info * devip;
2537
2538 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2539 printk(KERN_INFO "scsi_debug: device_reset\n");
2540 ++num_dev_resets;
2541 if (SCpnt) {
2542 devip = devInfoReg(SCpnt->device);
2543 if (devip)
2544 devip->reset = 1;
2545 }
2546 return SUCCESS;
2547}
2548
2549static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
2550{
2551 struct sdebug_host_info *sdbg_host;
2552 struct sdebug_dev_info * dev_info;
2553 struct scsi_device * sdp;
2554 struct Scsi_Host * hp;
2555
2556 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2557 printk(KERN_INFO "scsi_debug: bus_reset\n");
2558 ++num_bus_resets;
2559 if (SCpnt && ((sdp = SCpnt->device)) && ((hp = sdp->host))) {
2560 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
2561 if (sdbg_host) {
2562 list_for_each_entry(dev_info,
2563 &sdbg_host->dev_info_list,
2564 dev_list)
2565 dev_info->reset = 1;
2566 }
2567 }
2568 return SUCCESS;
2569}
2570
2571static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
2572{
2573 struct sdebug_host_info * sdbg_host;
2574 struct sdebug_dev_info * dev_info;
2575
2576 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2577 printk(KERN_INFO "scsi_debug: host_reset\n");
2578 ++num_host_resets;
2579 spin_lock(&sdebug_host_list_lock);
2580 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
2581 list_for_each_entry(dev_info, &sdbg_host->dev_info_list,
2582 dev_list)
2583 dev_info->reset = 1;
2584 }
2585 spin_unlock(&sdebug_host_list_lock);
2586 stop_all_queued();
2587 return SUCCESS;
2588}
2589
2590/* Initializes timers in queued array */
2591static void __init init_all_queued(void)
2592{
2593 unsigned long iflags;
2594 int k;
2595 struct sdebug_queued_cmd * sqcp;
2596
2597 spin_lock_irqsave(&queued_arr_lock, iflags);
2598 for (k = 0; k < scsi_debug_max_queue; ++k) {
2599 sqcp = &queued_arr[k];
2600 init_timer(&sqcp->cmnd_timer);
2601 sqcp->in_use = 0;
2602 sqcp->a_cmnd = NULL;
2603 }
2604 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2605}
2606
2607static void __init sdebug_build_parts(unsigned char *ramp,
2608 unsigned long store_size)
2609{
2610 struct partition * pp;
2611 int starts[SDEBUG_MAX_PARTS + 2];
2612 int sectors_per_part, num_sectors, k;
2613 int heads_by_sects, start_sec, end_sec;
2614
2615 /* assume partition table already zeroed */
2616 if ((scsi_debug_num_parts < 1) || (store_size < 1048576))
2617 return;
2618 if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) {
2619 scsi_debug_num_parts = SDEBUG_MAX_PARTS;
2620 printk(KERN_WARNING "scsi_debug:build_parts: reducing "
2621 "partitions to %d\n", SDEBUG_MAX_PARTS);
2622 }
2623 num_sectors = (int)sdebug_store_sectors;
2624 sectors_per_part = (num_sectors - sdebug_sectors_per)
2625 / scsi_debug_num_parts;
2626 heads_by_sects = sdebug_heads * sdebug_sectors_per;
2627 starts[0] = sdebug_sectors_per;
2628 for (k = 1; k < scsi_debug_num_parts; ++k)
2629 starts[k] = ((k * sectors_per_part) / heads_by_sects)
2630 * heads_by_sects;
2631 starts[scsi_debug_num_parts] = num_sectors;
2632 starts[scsi_debug_num_parts + 1] = 0;
2633
2634 ramp[510] = 0x55; /* magic partition markings */
2635 ramp[511] = 0xAA;
2636 pp = (struct partition *)(ramp + 0x1be);
2637 for (k = 0; starts[k + 1]; ++k, ++pp) {
2638 start_sec = starts[k];
2639 end_sec = starts[k + 1] - 1;
2640 pp->boot_ind = 0;
2641
2642 pp->cyl = start_sec / heads_by_sects;
2643 pp->head = (start_sec - (pp->cyl * heads_by_sects))
2644 / sdebug_sectors_per;
2645 pp->sector = (start_sec % sdebug_sectors_per) + 1;
2646
2647 pp->end_cyl = end_sec / heads_by_sects;
2648 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
2649 / sdebug_sectors_per;
2650 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
2651
2652 pp->start_sect = start_sec;
2653 pp->nr_sects = end_sec - start_sec + 1;
2654 pp->sys_ind = 0x83; /* plain Linux partition */
2655 }
2656}
2657
2658static int schedule_resp(struct scsi_cmnd * cmnd,
2659 struct sdebug_dev_info * devip,
2660 done_funct_t done, int scsi_result, int delta_jiff)
2661{
2662 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmnd) {
2663 if (scsi_result) {
2664 struct scsi_device * sdp = cmnd->device;
2665
2666 printk(KERN_INFO "scsi_debug: <%u %u %u %u> "
2667 "non-zero result=0x%x\n", sdp->host->host_no,
2668 sdp->channel, sdp->id, sdp->lun, scsi_result);
2669 }
2670 }
2671 if (cmnd && devip) {
2672 /* simulate autosense by this driver */
2673 if (SAM_STAT_CHECK_CONDITION == (scsi_result & 0xff))
2674 memcpy(cmnd->sense_buffer, devip->sense_buff,
2675 (SCSI_SENSE_BUFFERSIZE > SDEBUG_SENSE_LEN) ?
2676 SDEBUG_SENSE_LEN : SCSI_SENSE_BUFFERSIZE);
2677 }
2678 if (delta_jiff <= 0) {
2679 if (cmnd)
2680 cmnd->result = scsi_result;
2681 if (done)
2682 done(cmnd);
2683 return 0;
2684 } else {
2685 unsigned long iflags;
2686 int k;
2687 struct sdebug_queued_cmd * sqcp = NULL;
2688
2689 spin_lock_irqsave(&queued_arr_lock, iflags);
2690 for (k = 0; k < scsi_debug_max_queue; ++k) {
2691 sqcp = &queued_arr[k];
2692 if (! sqcp->in_use)
2693 break;
2694 }
2695 if (k >= scsi_debug_max_queue) {
2696 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2697 printk(KERN_WARNING "scsi_debug: can_queue exceeded\n");
2698 return 1; /* report busy to mid level */
2699 }
2700 sqcp->in_use = 1;
2701 sqcp->a_cmnd = cmnd;
2702 sqcp->scsi_result = scsi_result;
2703 sqcp->done_funct = done;
2704 sqcp->cmnd_timer.function = timer_intr_handler;
2705 sqcp->cmnd_timer.data = k;
2706 sqcp->cmnd_timer.expires = jiffies + delta_jiff;
2707 add_timer(&sqcp->cmnd_timer);
2708 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2709 if (cmnd)
2710 cmnd->result = 0;
2711 return 0;
2712 }
2713}
2714/* Note: The following macros create attribute files in the
2715 /sys/module/scsi_debug/parameters directory. Unfortunately this
2716 driver is unaware of a change and cannot trigger auxiliary actions
2717 as it can when the corresponding attribute in the
2718 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
2719 */
2720module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR);
2721module_param_named(ato, scsi_debug_ato, int, S_IRUGO);
2722module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR);
2723module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO);
2724module_param_named(dif, scsi_debug_dif, int, S_IRUGO);
2725module_param_named(dix, scsi_debug_dix, int, S_IRUGO);
2726module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR);
2727module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR);
2728module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR);
2729module_param_named(guard, scsi_debug_guard, int, S_IRUGO);
2730module_param_named(lbpu, scsi_debug_lbpu, int, S_IRUGO);
2731module_param_named(lbpws, scsi_debug_lbpws, int, S_IRUGO);
2732module_param_named(lbpws10, scsi_debug_lbpws10, int, S_IRUGO);
2733module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO);
2734module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR);
2735module_param_named(max_queue, scsi_debug_max_queue, int, S_IRUGO | S_IWUSR);
2736module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR);
2737module_param_named(no_uld, scsi_debug_no_uld, int, S_IRUGO);
2738module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO);
2739module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR);
2740module_param_named(opt_blks, scsi_debug_opt_blks, int, S_IRUGO);
2741module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR);
2742module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO);
2743module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR);
2744module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO);
2745module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO);
2746module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO);
2747module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO);
2748module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO);
2749module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, int, S_IRUGO);
2750module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR);
2751module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int,
2752 S_IRUGO | S_IWUSR);
2753module_param_named(write_same_length, scsi_debug_write_same_length, int,
2754 S_IRUGO | S_IWUSR);
2755
2756MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
2757MODULE_DESCRIPTION("SCSI debug adapter driver");
2758MODULE_LICENSE("GPL");
2759MODULE_VERSION(SCSI_DEBUG_VERSION);
2760
2761MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
2762MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
2763MODULE_PARM_DESC(delay, "# of jiffies to delay response(def=1)");
2764MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs(def=8)");
2765MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
2766MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
2767MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
2768MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
2769MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
2770MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
2771MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
2772MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
2773MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
2774MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
2775MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
2776MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to 255(def))");
2777MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
2778MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
2779MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
2780MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
2781MODULE_PARM_DESC(opt_blks, "optimal transfer length in block (def=64)");
2782MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
2783MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
2784MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
2785MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])");
2786MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
2787MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
2788MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
2789MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
2790MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
2791MODULE_PARM_DESC(virtual_gb, "virtual gigabyte size (def=0 -> use dev_size_mb)");
2792MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
2793MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
2794
2795static char sdebug_info[256];
2796
2797static const char * scsi_debug_info(struct Scsi_Host * shp)
2798{
2799 sprintf(sdebug_info, "scsi_debug, version %s [%s], "
2800 "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION,
2801 scsi_debug_version_date, scsi_debug_dev_size_mb,
2802 scsi_debug_opts);
2803 return sdebug_info;
2804}
2805
2806/* scsi_debug_proc_info
2807 * Used if the driver currently has no own support for /proc/scsi
2808 */
2809static int scsi_debug_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset,
2810 int length, int inout)
2811{
2812 int len, pos, begin;
2813 int orig_length;
2814
2815 orig_length = length;
2816
2817 if (inout == 1) {
2818 char arr[16];
2819 int minLen = length > 15 ? 15 : length;
2820
2821 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
2822 return -EACCES;
2823 memcpy(arr, buffer, minLen);
2824 arr[minLen] = '\0';
2825 if (1 != sscanf(arr, "%d", &pos))
2826 return -EINVAL;
2827 scsi_debug_opts = pos;
2828 if (scsi_debug_every_nth != 0)
2829 scsi_debug_cmnd_count = 0;
2830 return length;
2831 }
2832 begin = 0;
2833 pos = len = sprintf(buffer, "scsi_debug adapter driver, version "
2834 "%s [%s]\n"
2835 "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, "
2836 "every_nth=%d(curr:%d)\n"
2837 "delay=%d, max_luns=%d, scsi_level=%d\n"
2838 "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n"
2839 "number of aborts=%d, device_reset=%d, bus_resets=%d, "
2840 "host_resets=%d\ndix_reads=%d dix_writes=%d dif_errors=%d\n",
2841 SCSI_DEBUG_VERSION, scsi_debug_version_date, scsi_debug_num_tgts,
2842 scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth,
2843 scsi_debug_cmnd_count, scsi_debug_delay,
2844 scsi_debug_max_luns, scsi_debug_scsi_level,
2845 scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads,
2846 sdebug_sectors_per, num_aborts, num_dev_resets, num_bus_resets,
2847 num_host_resets, dix_reads, dix_writes, dif_errors);
2848 if (pos < offset) {
2849 len = 0;
2850 begin = pos;
2851 }
2852 *start = buffer + (offset - begin); /* Start of wanted data */
2853 len -= (offset - begin);
2854 if (len > length)
2855 len = length;
2856 return len;
2857}
2858
2859static ssize_t sdebug_delay_show(struct device_driver * ddp, char * buf)
2860{
2861 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay);
2862}
2863
2864static ssize_t sdebug_delay_store(struct device_driver * ddp,
2865 const char * buf, size_t count)
2866{
2867 int delay;
2868 char work[20];
2869
2870 if (1 == sscanf(buf, "%10s", work)) {
2871 if ((1 == sscanf(work, "%d", &delay)) && (delay >= 0)) {
2872 scsi_debug_delay = delay;
2873 return count;
2874 }
2875 }
2876 return -EINVAL;
2877}
2878DRIVER_ATTR(delay, S_IRUGO | S_IWUSR, sdebug_delay_show,
2879 sdebug_delay_store);
2880
2881static ssize_t sdebug_opts_show(struct device_driver * ddp, char * buf)
2882{
2883 return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts);
2884}
2885
2886static ssize_t sdebug_opts_store(struct device_driver * ddp,
2887 const char * buf, size_t count)
2888{
2889 int opts;
2890 char work[20];
2891
2892 if (1 == sscanf(buf, "%10s", work)) {
2893 if (0 == strnicmp(work,"0x", 2)) {
2894 if (1 == sscanf(&work[2], "%x", &opts))
2895 goto opts_done;
2896 } else {
2897 if (1 == sscanf(work, "%d", &opts))
2898 goto opts_done;
2899 }
2900 }
2901 return -EINVAL;
2902opts_done:
2903 scsi_debug_opts = opts;
2904 scsi_debug_cmnd_count = 0;
2905 return count;
2906}
2907DRIVER_ATTR(opts, S_IRUGO | S_IWUSR, sdebug_opts_show,
2908 sdebug_opts_store);
2909
2910static ssize_t sdebug_ptype_show(struct device_driver * ddp, char * buf)
2911{
2912 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype);
2913}
2914static ssize_t sdebug_ptype_store(struct device_driver * ddp,
2915 const char * buf, size_t count)
2916{
2917 int n;
2918
2919 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2920 scsi_debug_ptype = n;
2921 return count;
2922 }
2923 return -EINVAL;
2924}
2925DRIVER_ATTR(ptype, S_IRUGO | S_IWUSR, sdebug_ptype_show, sdebug_ptype_store);
2926
2927static ssize_t sdebug_dsense_show(struct device_driver * ddp, char * buf)
2928{
2929 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense);
2930}
2931static ssize_t sdebug_dsense_store(struct device_driver * ddp,
2932 const char * buf, size_t count)
2933{
2934 int n;
2935
2936 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2937 scsi_debug_dsense = n;
2938 return count;
2939 }
2940 return -EINVAL;
2941}
2942DRIVER_ATTR(dsense, S_IRUGO | S_IWUSR, sdebug_dsense_show,
2943 sdebug_dsense_store);
2944
2945static ssize_t sdebug_fake_rw_show(struct device_driver * ddp, char * buf)
2946{
2947 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw);
2948}
2949static ssize_t sdebug_fake_rw_store(struct device_driver * ddp,
2950 const char * buf, size_t count)
2951{
2952 int n;
2953
2954 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2955 scsi_debug_fake_rw = n;
2956 return count;
2957 }
2958 return -EINVAL;
2959}
2960DRIVER_ATTR(fake_rw, S_IRUGO | S_IWUSR, sdebug_fake_rw_show,
2961 sdebug_fake_rw_store);
2962
2963static ssize_t sdebug_no_lun_0_show(struct device_driver * ddp, char * buf)
2964{
2965 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0);
2966}
2967static ssize_t sdebug_no_lun_0_store(struct device_driver * ddp,
2968 const char * buf, size_t count)
2969{
2970 int n;
2971
2972 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2973 scsi_debug_no_lun_0 = n;
2974 return count;
2975 }
2976 return -EINVAL;
2977}
2978DRIVER_ATTR(no_lun_0, S_IRUGO | S_IWUSR, sdebug_no_lun_0_show,
2979 sdebug_no_lun_0_store);
2980
2981static ssize_t sdebug_num_tgts_show(struct device_driver * ddp, char * buf)
2982{
2983 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts);
2984}
2985static ssize_t sdebug_num_tgts_store(struct device_driver * ddp,
2986 const char * buf, size_t count)
2987{
2988 int n;
2989
2990 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2991 scsi_debug_num_tgts = n;
2992 sdebug_max_tgts_luns();
2993 return count;
2994 }
2995 return -EINVAL;
2996}
2997DRIVER_ATTR(num_tgts, S_IRUGO | S_IWUSR, sdebug_num_tgts_show,
2998 sdebug_num_tgts_store);
2999
3000static ssize_t sdebug_dev_size_mb_show(struct device_driver * ddp, char * buf)
3001{
3002 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb);
3003}
3004DRIVER_ATTR(dev_size_mb, S_IRUGO, sdebug_dev_size_mb_show, NULL);
3005
3006static ssize_t sdebug_num_parts_show(struct device_driver * ddp, char * buf)
3007{
3008 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts);
3009}
3010DRIVER_ATTR(num_parts, S_IRUGO, sdebug_num_parts_show, NULL);
3011
3012static ssize_t sdebug_every_nth_show(struct device_driver * ddp, char * buf)
3013{
3014 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth);
3015}
3016static ssize_t sdebug_every_nth_store(struct device_driver * ddp,
3017 const char * buf, size_t count)
3018{
3019 int nth;
3020
3021 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
3022 scsi_debug_every_nth = nth;
3023 scsi_debug_cmnd_count = 0;
3024 return count;
3025 }
3026 return -EINVAL;
3027}
3028DRIVER_ATTR(every_nth, S_IRUGO | S_IWUSR, sdebug_every_nth_show,
3029 sdebug_every_nth_store);
3030
3031static ssize_t sdebug_max_luns_show(struct device_driver * ddp, char * buf)
3032{
3033 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns);
3034}
3035static ssize_t sdebug_max_luns_store(struct device_driver * ddp,
3036 const char * buf, size_t count)
3037{
3038 int n;
3039
3040 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3041 scsi_debug_max_luns = n;
3042 sdebug_max_tgts_luns();
3043 return count;
3044 }
3045 return -EINVAL;
3046}
3047DRIVER_ATTR(max_luns, S_IRUGO | S_IWUSR, sdebug_max_luns_show,
3048 sdebug_max_luns_store);
3049
3050static ssize_t sdebug_max_queue_show(struct device_driver * ddp, char * buf)
3051{
3052 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_queue);
3053}
3054static ssize_t sdebug_max_queue_store(struct device_driver * ddp,
3055 const char * buf, size_t count)
3056{
3057 int n;
3058
3059 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
3060 (n <= SCSI_DEBUG_CANQUEUE)) {
3061 scsi_debug_max_queue = n;
3062 return count;
3063 }
3064 return -EINVAL;
3065}
3066DRIVER_ATTR(max_queue, S_IRUGO | S_IWUSR, sdebug_max_queue_show,
3067 sdebug_max_queue_store);
3068
3069static ssize_t sdebug_no_uld_show(struct device_driver * ddp, char * buf)
3070{
3071 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_uld);
3072}
3073DRIVER_ATTR(no_uld, S_IRUGO, sdebug_no_uld_show, NULL);
3074
3075static ssize_t sdebug_scsi_level_show(struct device_driver * ddp, char * buf)
3076{
3077 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level);
3078}
3079DRIVER_ATTR(scsi_level, S_IRUGO, sdebug_scsi_level_show, NULL);
3080
3081static ssize_t sdebug_virtual_gb_show(struct device_driver * ddp, char * buf)
3082{
3083 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb);
3084}
3085static ssize_t sdebug_virtual_gb_store(struct device_driver * ddp,
3086 const char * buf, size_t count)
3087{
3088 int n;
3089
3090 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3091 scsi_debug_virtual_gb = n;
3092
3093 sdebug_capacity = get_sdebug_capacity();
3094
3095 return count;
3096 }
3097 return -EINVAL;
3098}
3099DRIVER_ATTR(virtual_gb, S_IRUGO | S_IWUSR, sdebug_virtual_gb_show,
3100 sdebug_virtual_gb_store);
3101
3102static ssize_t sdebug_add_host_show(struct device_driver * ddp, char * buf)
3103{
3104 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host);
3105}
3106
3107static ssize_t sdebug_add_host_store(struct device_driver * ddp,
3108 const char * buf, size_t count)
3109{
3110 int delta_hosts;
3111
3112 if (sscanf(buf, "%d", &delta_hosts) != 1)
3113 return -EINVAL;
3114 if (delta_hosts > 0) {
3115 do {
3116 sdebug_add_adapter();
3117 } while (--delta_hosts);
3118 } else if (delta_hosts < 0) {
3119 do {
3120 sdebug_remove_adapter();
3121 } while (++delta_hosts);
3122 }
3123 return count;
3124}
3125DRIVER_ATTR(add_host, S_IRUGO | S_IWUSR, sdebug_add_host_show,
3126 sdebug_add_host_store);
3127
3128static ssize_t sdebug_vpd_use_hostno_show(struct device_driver * ddp,
3129 char * buf)
3130{
3131 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_vpd_use_hostno);
3132}
3133static ssize_t sdebug_vpd_use_hostno_store(struct device_driver * ddp,
3134 const char * buf, size_t count)
3135{
3136 int n;
3137
3138 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3139 scsi_debug_vpd_use_hostno = n;
3140 return count;
3141 }
3142 return -EINVAL;
3143}
3144DRIVER_ATTR(vpd_use_hostno, S_IRUGO | S_IWUSR, sdebug_vpd_use_hostno_show,
3145 sdebug_vpd_use_hostno_store);
3146
3147static ssize_t sdebug_sector_size_show(struct device_driver * ddp, char * buf)
3148{
3149 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size);
3150}
3151DRIVER_ATTR(sector_size, S_IRUGO, sdebug_sector_size_show, NULL);
3152
3153static ssize_t sdebug_dix_show(struct device_driver *ddp, char *buf)
3154{
3155 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix);
3156}
3157DRIVER_ATTR(dix, S_IRUGO, sdebug_dix_show, NULL);
3158
3159static ssize_t sdebug_dif_show(struct device_driver *ddp, char *buf)
3160{
3161 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif);
3162}
3163DRIVER_ATTR(dif, S_IRUGO, sdebug_dif_show, NULL);
3164
3165static ssize_t sdebug_guard_show(struct device_driver *ddp, char *buf)
3166{
3167 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_guard);
3168}
3169DRIVER_ATTR(guard, S_IRUGO, sdebug_guard_show, NULL);
3170
3171static ssize_t sdebug_ato_show(struct device_driver *ddp, char *buf)
3172{
3173 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato);
3174}
3175DRIVER_ATTR(ato, S_IRUGO, sdebug_ato_show, NULL);
3176
3177static ssize_t sdebug_map_show(struct device_driver *ddp, char *buf)
3178{
3179 ssize_t count;
3180
3181 if (!scsi_debug_lbp())
3182 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
3183 sdebug_store_sectors);
3184
3185 count = bitmap_scnlistprintf(buf, PAGE_SIZE, map_storep, map_size);
3186
3187 buf[count++] = '\n';
3188 buf[count++] = 0;
3189
3190 return count;
3191}
3192DRIVER_ATTR(map, S_IRUGO, sdebug_map_show, NULL);
3193
3194
3195/* Note: The following function creates attribute files in the
3196 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
3197 files (over those found in the /sys/module/scsi_debug/parameters
3198 directory) is that auxiliary actions can be triggered when an attribute
3199 is changed. For example see: sdebug_add_host_store() above.
3200 */
3201static int do_create_driverfs_files(void)
3202{
3203 int ret;
3204
3205 ret = driver_create_file(&sdebug_driverfs_driver, &driver_attr_add_host);
3206 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_delay);
3207 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb);
3208 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dsense);
3209 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_every_nth);
3210 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_fake_rw);
3211 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_luns);
3212 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_queue);
3213 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_no_lun_0);
3214 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_no_uld);
3215 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_parts);
3216 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_tgts);
3217 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ptype);
3218 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_opts);
3219 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_scsi_level);
3220 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb);
3221 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno);
3222 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_sector_size);
3223 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dix);
3224 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dif);
3225 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_guard);
3226 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ato);
3227 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_map);
3228 return ret;
3229}
3230
3231static void do_remove_driverfs_files(void)
3232{
3233 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_map);
3234 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ato);
3235 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_guard);
3236 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dif);
3237 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dix);
3238 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_sector_size);
3239 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno);
3240 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb);
3241 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_scsi_level);
3242 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_opts);
3243 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ptype);
3244 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_tgts);
3245 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_parts);
3246 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_no_uld);
3247 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_no_lun_0);
3248 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_queue);
3249 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_luns);
3250 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_fake_rw);
3251 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_every_nth);
3252 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dsense);
3253 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb);
3254 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_delay);
3255 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_add_host);
3256}
3257
3258struct device *pseudo_primary;
3259
3260static int __init scsi_debug_init(void)
3261{
3262 unsigned long sz;
3263 int host_to_add;
3264 int k;
3265 int ret;
3266
3267 switch (scsi_debug_sector_size) {
3268 case 512:
3269 case 1024:
3270 case 2048:
3271 case 4096:
3272 break;
3273 default:
3274 printk(KERN_ERR "scsi_debug_init: invalid sector_size %d\n",
3275 scsi_debug_sector_size);
3276 return -EINVAL;
3277 }
3278
3279 switch (scsi_debug_dif) {
3280
3281 case SD_DIF_TYPE0_PROTECTION:
3282 case SD_DIF_TYPE1_PROTECTION:
3283 case SD_DIF_TYPE2_PROTECTION:
3284 case SD_DIF_TYPE3_PROTECTION:
3285 break;
3286
3287 default:
3288 printk(KERN_ERR "scsi_debug_init: dif must be 0, 1, 2 or 3\n");
3289 return -EINVAL;
3290 }
3291
3292 if (scsi_debug_guard > 1) {
3293 printk(KERN_ERR "scsi_debug_init: guard must be 0 or 1\n");
3294 return -EINVAL;
3295 }
3296
3297 if (scsi_debug_ato > 1) {
3298 printk(KERN_ERR "scsi_debug_init: ato must be 0 or 1\n");
3299 return -EINVAL;
3300 }
3301
3302 if (scsi_debug_physblk_exp > 15) {
3303 printk(KERN_ERR "scsi_debug_init: invalid physblk_exp %u\n",
3304 scsi_debug_physblk_exp);
3305 return -EINVAL;
3306 }
3307
3308 if (scsi_debug_lowest_aligned > 0x3fff) {
3309 printk(KERN_ERR "scsi_debug_init: lowest_aligned too big: %u\n",
3310 scsi_debug_lowest_aligned);
3311 return -EINVAL;
3312 }
3313
3314 if (scsi_debug_dev_size_mb < 1)
3315 scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
3316 sz = (unsigned long)scsi_debug_dev_size_mb * 1048576;
3317 sdebug_store_sectors = sz / scsi_debug_sector_size;
3318 sdebug_capacity = get_sdebug_capacity();
3319
3320 /* play around with geometry, don't waste too much on track 0 */
3321 sdebug_heads = 8;
3322 sdebug_sectors_per = 32;
3323 if (scsi_debug_dev_size_mb >= 16)
3324 sdebug_heads = 32;
3325 else if (scsi_debug_dev_size_mb >= 256)
3326 sdebug_heads = 64;
3327 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
3328 (sdebug_sectors_per * sdebug_heads);
3329 if (sdebug_cylinders_per >= 1024) {
3330 /* other LLDs do this; implies >= 1GB ram disk ... */
3331 sdebug_heads = 255;
3332 sdebug_sectors_per = 63;
3333 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
3334 (sdebug_sectors_per * sdebug_heads);
3335 }
3336
3337 fake_storep = vmalloc(sz);
3338 if (NULL == fake_storep) {
3339 printk(KERN_ERR "scsi_debug_init: out of memory, 1\n");
3340 return -ENOMEM;
3341 }
3342 memset(fake_storep, 0, sz);
3343 if (scsi_debug_num_parts > 0)
3344 sdebug_build_parts(fake_storep, sz);
3345
3346 if (scsi_debug_dif) {
3347 int dif_size;
3348
3349 dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple);
3350 dif_storep = vmalloc(dif_size);
3351
3352 printk(KERN_ERR "scsi_debug_init: dif_storep %u bytes @ %p\n",
3353 dif_size, dif_storep);
3354
3355 if (dif_storep == NULL) {
3356 printk(KERN_ERR "scsi_debug_init: out of mem. (DIX)\n");
3357 ret = -ENOMEM;
3358 goto free_vm;
3359 }
3360
3361 memset(dif_storep, 0xff, dif_size);
3362 }
3363
3364 /* Logical Block Provisioning */
3365 if (scsi_debug_lbp()) {
3366 unsigned int map_bytes;
3367
3368 scsi_debug_unmap_max_blocks =
3369 clamp(scsi_debug_unmap_max_blocks, 0U, 0xffffffffU);
3370
3371 scsi_debug_unmap_max_desc =
3372 clamp(scsi_debug_unmap_max_desc, 0U, 256U);
3373
3374 scsi_debug_unmap_granularity =
3375 clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU);
3376
3377 if (scsi_debug_unmap_alignment &&
3378 scsi_debug_unmap_granularity < scsi_debug_unmap_alignment) {
3379 printk(KERN_ERR
3380 "%s: ERR: unmap_granularity < unmap_alignment\n",
3381 __func__);
3382 return -EINVAL;
3383 }
3384
3385 map_size = (sdebug_store_sectors / scsi_debug_unmap_granularity);
3386 map_bytes = map_size >> 3;
3387 map_storep = vmalloc(map_bytes);
3388
3389 printk(KERN_INFO "scsi_debug_init: %lu provisioning blocks\n",
3390 map_size);
3391
3392 if (map_storep == NULL) {
3393 printk(KERN_ERR "scsi_debug_init: out of mem. (MAP)\n");
3394 ret = -ENOMEM;
3395 goto free_vm;
3396 }
3397
3398 memset(map_storep, 0x0, map_bytes);
3399
3400 /* Map first 1KB for partition table */
3401 if (scsi_debug_num_parts)
3402 map_region(0, 2);
3403 }
3404
3405 pseudo_primary = root_device_register("pseudo_0");
3406 if (IS_ERR(pseudo_primary)) {
3407 printk(KERN_WARNING "scsi_debug: root_device_register() error\n");
3408 ret = PTR_ERR(pseudo_primary);
3409 goto free_vm;
3410 }
3411 ret = bus_register(&pseudo_lld_bus);
3412 if (ret < 0) {
3413 printk(KERN_WARNING "scsi_debug: bus_register error: %d\n",
3414 ret);
3415 goto dev_unreg;
3416 }
3417 ret = driver_register(&sdebug_driverfs_driver);
3418 if (ret < 0) {
3419 printk(KERN_WARNING "scsi_debug: driver_register error: %d\n",
3420 ret);
3421 goto bus_unreg;
3422 }
3423 ret = do_create_driverfs_files();
3424 if (ret < 0) {
3425 printk(KERN_WARNING "scsi_debug: driver_create_file error: %d\n",
3426 ret);
3427 goto del_files;
3428 }
3429
3430 init_all_queued();
3431
3432 host_to_add = scsi_debug_add_host;
3433 scsi_debug_add_host = 0;
3434
3435 for (k = 0; k < host_to_add; k++) {
3436 if (sdebug_add_adapter()) {
3437 printk(KERN_ERR "scsi_debug_init: "
3438 "sdebug_add_adapter failed k=%d\n", k);
3439 break;
3440 }
3441 }
3442
3443 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
3444 printk(KERN_INFO "scsi_debug_init: built %d host(s)\n",
3445 scsi_debug_add_host);
3446 }
3447 return 0;
3448
3449del_files:
3450 do_remove_driverfs_files();
3451 driver_unregister(&sdebug_driverfs_driver);
3452bus_unreg:
3453 bus_unregister(&pseudo_lld_bus);
3454dev_unreg:
3455 root_device_unregister(pseudo_primary);
3456free_vm:
3457 if (map_storep)
3458 vfree(map_storep);
3459 if (dif_storep)
3460 vfree(dif_storep);
3461 vfree(fake_storep);
3462
3463 return ret;
3464}
3465
3466static void __exit scsi_debug_exit(void)
3467{
3468 int k = scsi_debug_add_host;
3469
3470 stop_all_queued();
3471 for (; k; k--)
3472 sdebug_remove_adapter();
3473 do_remove_driverfs_files();
3474 driver_unregister(&sdebug_driverfs_driver);
3475 bus_unregister(&pseudo_lld_bus);
3476 root_device_unregister(pseudo_primary);
3477
3478 if (dif_storep)
3479 vfree(dif_storep);
3480
3481 vfree(fake_storep);
3482}
3483
3484device_initcall(scsi_debug_init);
3485module_exit(scsi_debug_exit);
3486
3487static void sdebug_release_adapter(struct device * dev)
3488{
3489 struct sdebug_host_info *sdbg_host;
3490
3491 sdbg_host = to_sdebug_host(dev);
3492 kfree(sdbg_host);
3493}
3494
3495static int sdebug_add_adapter(void)
3496{
3497 int k, devs_per_host;
3498 int error = 0;
3499 struct sdebug_host_info *sdbg_host;
3500 struct sdebug_dev_info *sdbg_devinfo, *tmp;
3501
3502 sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL);
3503 if (NULL == sdbg_host) {
3504 printk(KERN_ERR "%s: out of memory at line %d\n",
3505 __func__, __LINE__);
3506 return -ENOMEM;
3507 }
3508
3509 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
3510
3511 devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns;
3512 for (k = 0; k < devs_per_host; k++) {
3513 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
3514 if (!sdbg_devinfo) {
3515 printk(KERN_ERR "%s: out of memory at line %d\n",
3516 __func__, __LINE__);
3517 error = -ENOMEM;
3518 goto clean;
3519 }
3520 }
3521
3522 spin_lock(&sdebug_host_list_lock);
3523 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
3524 spin_unlock(&sdebug_host_list_lock);
3525
3526 sdbg_host->dev.bus = &pseudo_lld_bus;
3527 sdbg_host->dev.parent = pseudo_primary;
3528 sdbg_host->dev.release = &sdebug_release_adapter;
3529 dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host);
3530
3531 error = device_register(&sdbg_host->dev);
3532
3533 if (error)
3534 goto clean;
3535
3536 ++scsi_debug_add_host;
3537 return error;
3538
3539clean:
3540 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
3541 dev_list) {
3542 list_del(&sdbg_devinfo->dev_list);
3543 kfree(sdbg_devinfo);
3544 }
3545
3546 kfree(sdbg_host);
3547 return error;
3548}
3549
3550static void sdebug_remove_adapter(void)
3551{
3552 struct sdebug_host_info * sdbg_host = NULL;
3553
3554 spin_lock(&sdebug_host_list_lock);
3555 if (!list_empty(&sdebug_host_list)) {
3556 sdbg_host = list_entry(sdebug_host_list.prev,
3557 struct sdebug_host_info, host_list);
3558 list_del(&sdbg_host->host_list);
3559 }
3560 spin_unlock(&sdebug_host_list_lock);
3561
3562 if (!sdbg_host)
3563 return;
3564
3565 device_unregister(&sdbg_host->dev);
3566 --scsi_debug_add_host;
3567}
3568
3569static
3570int scsi_debug_queuecommand_lck(struct scsi_cmnd *SCpnt, done_funct_t done)
3571{
3572 unsigned char *cmd = (unsigned char *) SCpnt->cmnd;
3573 int len, k;
3574 unsigned int num;
3575 unsigned long long lba;
3576 u32 ei_lba;
3577 int errsts = 0;
3578 int target = SCpnt->device->id;
3579 struct sdebug_dev_info *devip = NULL;
3580 int inj_recovered = 0;
3581 int inj_transport = 0;
3582 int inj_dif = 0;
3583 int inj_dix = 0;
3584 int delay_override = 0;
3585 int unmap = 0;
3586
3587 scsi_set_resid(SCpnt, 0);
3588 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmd) {
3589 printk(KERN_INFO "scsi_debug: cmd ");
3590 for (k = 0, len = SCpnt->cmd_len; k < len; ++k)
3591 printk("%02x ", (int)cmd[k]);
3592 printk("\n");
3593 }
3594
3595 if (target == SCpnt->device->host->hostt->this_id) {
3596 printk(KERN_INFO "scsi_debug: initiator's id used as "
3597 "target!\n");
3598 return schedule_resp(SCpnt, NULL, done,
3599 DID_NO_CONNECT << 16, 0);
3600 }
3601
3602 if ((SCpnt->device->lun >= scsi_debug_max_luns) &&
3603 (SCpnt->device->lun != SAM2_WLUN_REPORT_LUNS))
3604 return schedule_resp(SCpnt, NULL, done,
3605 DID_NO_CONNECT << 16, 0);
3606 devip = devInfoReg(SCpnt->device);
3607 if (NULL == devip)
3608 return schedule_resp(SCpnt, NULL, done,
3609 DID_NO_CONNECT << 16, 0);
3610
3611 if ((scsi_debug_every_nth != 0) &&
3612 (++scsi_debug_cmnd_count >= abs(scsi_debug_every_nth))) {
3613 scsi_debug_cmnd_count = 0;
3614 if (scsi_debug_every_nth < -1)
3615 scsi_debug_every_nth = -1;
3616 if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts)
3617 return 0; /* ignore command causing timeout */
3618 else if (SCSI_DEBUG_OPT_RECOVERED_ERR & scsi_debug_opts)
3619 inj_recovered = 1; /* to reads and writes below */
3620 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & scsi_debug_opts)
3621 inj_transport = 1; /* to reads and writes below */
3622 else if (SCSI_DEBUG_OPT_DIF_ERR & scsi_debug_opts)
3623 inj_dif = 1; /* to reads and writes below */
3624 else if (SCSI_DEBUG_OPT_DIX_ERR & scsi_debug_opts)
3625 inj_dix = 1; /* to reads and writes below */
3626 }
3627
3628 if (devip->wlun) {
3629 switch (*cmd) {
3630 case INQUIRY:
3631 case REQUEST_SENSE:
3632 case TEST_UNIT_READY:
3633 case REPORT_LUNS:
3634 break; /* only allowable wlun commands */
3635 default:
3636 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3637 printk(KERN_INFO "scsi_debug: Opcode: 0x%x "
3638 "not supported for wlun\n", *cmd);
3639 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3640 INVALID_OPCODE, 0);
3641 errsts = check_condition_result;
3642 return schedule_resp(SCpnt, devip, done, errsts,
3643 0);
3644 }
3645 }
3646
3647 switch (*cmd) {
3648 case INQUIRY: /* mandatory, ignore unit attention */
3649 delay_override = 1;
3650 errsts = resp_inquiry(SCpnt, target, devip);
3651 break;
3652 case REQUEST_SENSE: /* mandatory, ignore unit attention */
3653 delay_override = 1;
3654 errsts = resp_requests(SCpnt, devip);
3655 break;
3656 case REZERO_UNIT: /* actually this is REWIND for SSC */
3657 case START_STOP:
3658 errsts = resp_start_stop(SCpnt, devip);
3659 break;
3660 case ALLOW_MEDIUM_REMOVAL:
3661 errsts = check_readiness(SCpnt, 1, devip);
3662 if (errsts)
3663 break;
3664 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3665 printk(KERN_INFO "scsi_debug: Medium removal %s\n",
3666 cmd[4] ? "inhibited" : "enabled");
3667 break;
3668 case SEND_DIAGNOSTIC: /* mandatory */
3669 errsts = check_readiness(SCpnt, 1, devip);
3670 break;
3671 case TEST_UNIT_READY: /* mandatory */
3672 delay_override = 1;
3673 errsts = check_readiness(SCpnt, 0, devip);
3674 break;
3675 case RESERVE:
3676 errsts = check_readiness(SCpnt, 1, devip);
3677 break;
3678 case RESERVE_10:
3679 errsts = check_readiness(SCpnt, 1, devip);
3680 break;
3681 case RELEASE:
3682 errsts = check_readiness(SCpnt, 1, devip);
3683 break;
3684 case RELEASE_10:
3685 errsts = check_readiness(SCpnt, 1, devip);
3686 break;
3687 case READ_CAPACITY:
3688 errsts = resp_readcap(SCpnt, devip);
3689 break;
3690 case SERVICE_ACTION_IN:
3691 if (cmd[1] == SAI_READ_CAPACITY_16)
3692 errsts = resp_readcap16(SCpnt, devip);
3693 else if (cmd[1] == SAI_GET_LBA_STATUS) {
3694
3695 if (scsi_debug_lbp() == 0) {
3696 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3697 INVALID_COMMAND_OPCODE, 0);
3698 errsts = check_condition_result;
3699 } else
3700 errsts = resp_get_lba_status(SCpnt, devip);
3701 } else {
3702 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3703 INVALID_OPCODE, 0);
3704 errsts = check_condition_result;
3705 }
3706 break;
3707 case MAINTENANCE_IN:
3708 if (MI_REPORT_TARGET_PGS != cmd[1]) {
3709 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3710 INVALID_OPCODE, 0);
3711 errsts = check_condition_result;
3712 break;
3713 }
3714 errsts = resp_report_tgtpgs(SCpnt, devip);
3715 break;
3716 case READ_16:
3717 case READ_12:
3718 case READ_10:
3719 /* READ{10,12,16} and DIF Type 2 are natural enemies */
3720 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
3721 cmd[1] & 0xe0) {
3722 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3723 INVALID_COMMAND_OPCODE, 0);
3724 errsts = check_condition_result;
3725 break;
3726 }
3727
3728 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
3729 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
3730 (cmd[1] & 0xe0) == 0)
3731 printk(KERN_ERR "Unprotected RD/WR to DIF device\n");
3732
3733 /* fall through */
3734 case READ_6:
3735read:
3736 errsts = check_readiness(SCpnt, 0, devip);
3737 if (errsts)
3738 break;
3739 if (scsi_debug_fake_rw)
3740 break;
3741 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3742 errsts = resp_read(SCpnt, lba, num, devip, ei_lba);
3743 if (inj_recovered && (0 == errsts)) {
3744 mk_sense_buffer(devip, RECOVERED_ERROR,
3745 THRESHOLD_EXCEEDED, 0);
3746 errsts = check_condition_result;
3747 } else if (inj_transport && (0 == errsts)) {
3748 mk_sense_buffer(devip, ABORTED_COMMAND,
3749 TRANSPORT_PROBLEM, ACK_NAK_TO);
3750 errsts = check_condition_result;
3751 } else if (inj_dif && (0 == errsts)) {
3752 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1);
3753 errsts = illegal_condition_result;
3754 } else if (inj_dix && (0 == errsts)) {
3755 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1);
3756 errsts = illegal_condition_result;
3757 }
3758 break;
3759 case REPORT_LUNS: /* mandatory, ignore unit attention */
3760 delay_override = 1;
3761 errsts = resp_report_luns(SCpnt, devip);
3762 break;
3763 case VERIFY: /* 10 byte SBC-2 command */
3764 errsts = check_readiness(SCpnt, 0, devip);
3765 break;
3766 case WRITE_16:
3767 case WRITE_12:
3768 case WRITE_10:
3769 /* WRITE{10,12,16} and DIF Type 2 are natural enemies */
3770 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
3771 cmd[1] & 0xe0) {
3772 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3773 INVALID_COMMAND_OPCODE, 0);
3774 errsts = check_condition_result;
3775 break;
3776 }
3777
3778 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
3779 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
3780 (cmd[1] & 0xe0) == 0)
3781 printk(KERN_ERR "Unprotected RD/WR to DIF device\n");
3782
3783 /* fall through */
3784 case WRITE_6:
3785write:
3786 errsts = check_readiness(SCpnt, 0, devip);
3787 if (errsts)
3788 break;
3789 if (scsi_debug_fake_rw)
3790 break;
3791 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3792 errsts = resp_write(SCpnt, lba, num, devip, ei_lba);
3793 if (inj_recovered && (0 == errsts)) {
3794 mk_sense_buffer(devip, RECOVERED_ERROR,
3795 THRESHOLD_EXCEEDED, 0);
3796 errsts = check_condition_result;
3797 } else if (inj_dif && (0 == errsts)) {
3798 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1);
3799 errsts = illegal_condition_result;
3800 } else if (inj_dix && (0 == errsts)) {
3801 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1);
3802 errsts = illegal_condition_result;
3803 }
3804 break;
3805 case WRITE_SAME_16:
3806 case WRITE_SAME:
3807 if (cmd[1] & 0x8) {
3808 if ((*cmd == WRITE_SAME_16 && scsi_debug_lbpws == 0) ||
3809 (*cmd == WRITE_SAME && scsi_debug_lbpws10 == 0)) {
3810 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3811 INVALID_FIELD_IN_CDB, 0);
3812 errsts = check_condition_result;
3813 } else
3814 unmap = 1;
3815 }
3816 if (errsts)
3817 break;
3818 errsts = check_readiness(SCpnt, 0, devip);
3819 if (errsts)
3820 break;
3821 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3822 errsts = resp_write_same(SCpnt, lba, num, devip, ei_lba, unmap);
3823 break;
3824 case UNMAP:
3825 errsts = check_readiness(SCpnt, 0, devip);
3826 if (errsts)
3827 break;
3828
3829 if (scsi_debug_unmap_max_desc == 0 || scsi_debug_lbpu == 0) {
3830 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3831 INVALID_COMMAND_OPCODE, 0);
3832 errsts = check_condition_result;
3833 } else
3834 errsts = resp_unmap(SCpnt, devip);
3835 break;
3836 case MODE_SENSE:
3837 case MODE_SENSE_10:
3838 errsts = resp_mode_sense(SCpnt, target, devip);
3839 break;
3840 case MODE_SELECT:
3841 errsts = resp_mode_select(SCpnt, 1, devip);
3842 break;
3843 case MODE_SELECT_10:
3844 errsts = resp_mode_select(SCpnt, 0, devip);
3845 break;
3846 case LOG_SENSE:
3847 errsts = resp_log_sense(SCpnt, devip);
3848 break;
3849 case SYNCHRONIZE_CACHE:
3850 delay_override = 1;
3851 errsts = check_readiness(SCpnt, 0, devip);
3852 break;
3853 case WRITE_BUFFER:
3854 errsts = check_readiness(SCpnt, 1, devip);
3855 break;
3856 case XDWRITEREAD_10:
3857 if (!scsi_bidi_cmnd(SCpnt)) {
3858 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3859 INVALID_FIELD_IN_CDB, 0);
3860 errsts = check_condition_result;
3861 break;
3862 }
3863
3864 errsts = check_readiness(SCpnt, 0, devip);
3865 if (errsts)
3866 break;
3867 if (scsi_debug_fake_rw)
3868 break;
3869 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3870 errsts = resp_read(SCpnt, lba, num, devip, ei_lba);
3871 if (errsts)
3872 break;
3873 errsts = resp_write(SCpnt, lba, num, devip, ei_lba);
3874 if (errsts)
3875 break;
3876 errsts = resp_xdwriteread(SCpnt, lba, num, devip);
3877 break;
3878 case VARIABLE_LENGTH_CMD:
3879 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION) {
3880
3881 if ((cmd[10] & 0xe0) == 0)
3882 printk(KERN_ERR
3883 "Unprotected RD/WR to DIF device\n");
3884
3885 if (cmd[9] == READ_32) {
3886 BUG_ON(SCpnt->cmd_len < 32);
3887 goto read;
3888 }
3889
3890 if (cmd[9] == WRITE_32) {
3891 BUG_ON(SCpnt->cmd_len < 32);
3892 goto write;
3893 }
3894 }
3895
3896 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3897 INVALID_FIELD_IN_CDB, 0);
3898 errsts = check_condition_result;
3899 break;
3900
3901 default:
3902 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3903 printk(KERN_INFO "scsi_debug: Opcode: 0x%x not "
3904 "supported\n", *cmd);
3905 errsts = check_readiness(SCpnt, 1, devip);
3906 if (errsts)
3907 break; /* Unit attention takes precedence */
3908 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
3909 errsts = check_condition_result;
3910 break;
3911 }
3912 return schedule_resp(SCpnt, devip, done, errsts,
3913 (delay_override ? 0 : scsi_debug_delay));
3914}
3915
3916static DEF_SCSI_QCMD(scsi_debug_queuecommand)
3917
3918static struct scsi_host_template sdebug_driver_template = {
3919 .proc_info = scsi_debug_proc_info,
3920 .proc_name = sdebug_proc_name,
3921 .name = "SCSI DEBUG",
3922 .info = scsi_debug_info,
3923 .slave_alloc = scsi_debug_slave_alloc,
3924 .slave_configure = scsi_debug_slave_configure,
3925 .slave_destroy = scsi_debug_slave_destroy,
3926 .ioctl = scsi_debug_ioctl,
3927 .queuecommand = scsi_debug_queuecommand,
3928 .eh_abort_handler = scsi_debug_abort,
3929 .eh_bus_reset_handler = scsi_debug_bus_reset,
3930 .eh_device_reset_handler = scsi_debug_device_reset,
3931 .eh_host_reset_handler = scsi_debug_host_reset,
3932 .bios_param = scsi_debug_biosparam,
3933 .can_queue = SCSI_DEBUG_CANQUEUE,
3934 .this_id = 7,
3935 .sg_tablesize = 256,
3936 .cmd_per_lun = 16,
3937 .max_sectors = 0xffff,
3938 .use_clustering = DISABLE_CLUSTERING,
3939 .module = THIS_MODULE,
3940};
3941
3942static int sdebug_driver_probe(struct device * dev)
3943{
3944 int error = 0;
3945 struct sdebug_host_info *sdbg_host;
3946 struct Scsi_Host *hpnt;
3947 int host_prot;
3948
3949 sdbg_host = to_sdebug_host(dev);
3950
3951 sdebug_driver_template.can_queue = scsi_debug_max_queue;
3952 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
3953 if (NULL == hpnt) {
3954 printk(KERN_ERR "%s: scsi_register failed\n", __func__);
3955 error = -ENODEV;
3956 return error;
3957 }
3958
3959 sdbg_host->shost = hpnt;
3960 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
3961 if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id))
3962 hpnt->max_id = scsi_debug_num_tgts + 1;
3963 else
3964 hpnt->max_id = scsi_debug_num_tgts;
3965 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; /* = scsi_debug_max_luns; */
3966
3967 host_prot = 0;
3968
3969 switch (scsi_debug_dif) {
3970
3971 case SD_DIF_TYPE1_PROTECTION:
3972 host_prot = SHOST_DIF_TYPE1_PROTECTION;
3973 if (scsi_debug_dix)
3974 host_prot |= SHOST_DIX_TYPE1_PROTECTION;
3975 break;
3976
3977 case SD_DIF_TYPE2_PROTECTION:
3978 host_prot = SHOST_DIF_TYPE2_PROTECTION;
3979 if (scsi_debug_dix)
3980 host_prot |= SHOST_DIX_TYPE2_PROTECTION;
3981 break;
3982
3983 case SD_DIF_TYPE3_PROTECTION:
3984 host_prot = SHOST_DIF_TYPE3_PROTECTION;
3985 if (scsi_debug_dix)
3986 host_prot |= SHOST_DIX_TYPE3_PROTECTION;
3987 break;
3988
3989 default:
3990 if (scsi_debug_dix)
3991 host_prot |= SHOST_DIX_TYPE0_PROTECTION;
3992 break;
3993 }
3994
3995 scsi_host_set_prot(hpnt, host_prot);
3996
3997 printk(KERN_INFO "scsi_debug: host protection%s%s%s%s%s%s%s\n",
3998 (host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
3999 (host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
4000 (host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
4001 (host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
4002 (host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
4003 (host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
4004 (host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
4005
4006 if (scsi_debug_guard == 1)
4007 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
4008 else
4009 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
4010
4011 error = scsi_add_host(hpnt, &sdbg_host->dev);
4012 if (error) {
4013 printk(KERN_ERR "%s: scsi_add_host failed\n", __func__);
4014 error = -ENODEV;
4015 scsi_host_put(hpnt);
4016 } else
4017 scsi_scan_host(hpnt);
4018
4019
4020 return error;
4021}
4022
4023static int sdebug_driver_remove(struct device * dev)
4024{
4025 struct sdebug_host_info *sdbg_host;
4026 struct sdebug_dev_info *sdbg_devinfo, *tmp;
4027
4028 sdbg_host = to_sdebug_host(dev);
4029
4030 if (!sdbg_host) {
4031 printk(KERN_ERR "%s: Unable to locate host info\n",
4032 __func__);
4033 return -ENODEV;
4034 }
4035
4036 scsi_remove_host(sdbg_host->shost);
4037
4038 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
4039 dev_list) {
4040 list_del(&sdbg_devinfo->dev_list);
4041 kfree(sdbg_devinfo);
4042 }
4043
4044 scsi_host_put(sdbg_host->shost);
4045 return 0;
4046}
4047
4048static int pseudo_lld_bus_match(struct device *dev,
4049 struct device_driver *dev_driver)
4050{
4051 return 1;
4052}
4053
4054static struct bus_type pseudo_lld_bus = {
4055 .name = "pseudo",
4056 .match = pseudo_lld_bus_match,
4057 .probe = sdebug_driver_probe,
4058 .remove = sdebug_driver_remove,
4059};
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};