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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// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
4 * Copyright (C) 1992 Eric Youngdale
5 * Simulate a host adapter with 2 disks attached. Do a lot of checking
6 * to make sure that we are not getting blocks mixed up, and PANIC if
7 * anything out of the ordinary is seen.
8 * ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
9 *
10 * Copyright (C) 2001 - 2020 Douglas Gilbert
11 *
12 * For documentation see http://sg.danny.cz/sg/scsi_debug.html
13 */
14
15
16#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
17
18#include <linux/module.h>
19
20#include <linux/kernel.h>
21#include <linux/errno.h>
22#include <linux/jiffies.h>
23#include <linux/slab.h>
24#include <linux/types.h>
25#include <linux/string.h>
26#include <linux/genhd.h>
27#include <linux/fs.h>
28#include <linux/init.h>
29#include <linux/proc_fs.h>
30#include <linux/vmalloc.h>
31#include <linux/moduleparam.h>
32#include <linux/scatterlist.h>
33#include <linux/blkdev.h>
34#include <linux/crc-t10dif.h>
35#include <linux/spinlock.h>
36#include <linux/interrupt.h>
37#include <linux/atomic.h>
38#include <linux/hrtimer.h>
39#include <linux/uuid.h>
40#include <linux/t10-pi.h>
41#include <linux/msdos_partition.h>
42#include <linux/random.h>
43#include <linux/xarray.h>
44#include <linux/prefetch.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_tcq.h>
57#include <scsi/scsi_dbg.h>
58
59#include "sd.h"
60#include "scsi_logging.h"
61
62/* make sure inq_product_rev string corresponds to this version */
63#define SDEBUG_VERSION "0190" /* format to fit INQUIRY revision field */
64static const char *sdebug_version_date = "20200710";
65
66#define MY_NAME "scsi_debug"
67
68/* Additional Sense Code (ASC) */
69#define NO_ADDITIONAL_SENSE 0x0
70#define LOGICAL_UNIT_NOT_READY 0x4
71#define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
72#define UNRECOVERED_READ_ERR 0x11
73#define PARAMETER_LIST_LENGTH_ERR 0x1a
74#define INVALID_OPCODE 0x20
75#define LBA_OUT_OF_RANGE 0x21
76#define INVALID_FIELD_IN_CDB 0x24
77#define INVALID_FIELD_IN_PARAM_LIST 0x26
78#define WRITE_PROTECTED 0x27
79#define UA_RESET_ASC 0x29
80#define UA_CHANGED_ASC 0x2a
81#define TARGET_CHANGED_ASC 0x3f
82#define LUNS_CHANGED_ASCQ 0x0e
83#define INSUFF_RES_ASC 0x55
84#define INSUFF_RES_ASCQ 0x3
85#define POWER_ON_RESET_ASCQ 0x0
86#define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */
87#define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */
88#define CAPACITY_CHANGED_ASCQ 0x9
89#define SAVING_PARAMS_UNSUP 0x39
90#define TRANSPORT_PROBLEM 0x4b
91#define THRESHOLD_EXCEEDED 0x5d
92#define LOW_POWER_COND_ON 0x5e
93#define MISCOMPARE_VERIFY_ASC 0x1d
94#define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */
95#define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16
96#define WRITE_ERROR_ASC 0xc
97#define UNALIGNED_WRITE_ASCQ 0x4
98#define WRITE_BOUNDARY_ASCQ 0x5
99#define READ_INVDATA_ASCQ 0x6
100#define READ_BOUNDARY_ASCQ 0x7
101#define INSUFF_ZONE_ASCQ 0xe
102
103/* Additional Sense Code Qualifier (ASCQ) */
104#define ACK_NAK_TO 0x3
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_CDB_LEN 10
115#define DEF_JDELAY 1 /* if > 0 unit is a jiffy */
116#define DEF_DEV_SIZE_PRE_INIT 0
117#define DEF_DEV_SIZE_MB 8
118#define DEF_ZBC_DEV_SIZE_MB 128
119#define DEF_DIF 0
120#define DEF_DIX 0
121#define DEF_PER_HOST_STORE false
122#define DEF_D_SENSE 0
123#define DEF_EVERY_NTH 0
124#define DEF_FAKE_RW 0
125#define DEF_GUARD 0
126#define DEF_HOST_LOCK 0
127#define DEF_LBPU 0
128#define DEF_LBPWS 0
129#define DEF_LBPWS10 0
130#define DEF_LBPRZ 1
131#define DEF_LOWEST_ALIGNED 0
132#define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */
133#define DEF_NO_LUN_0 0
134#define DEF_NUM_PARTS 0
135#define DEF_OPTS 0
136#define DEF_OPT_BLKS 1024
137#define DEF_PHYSBLK_EXP 0
138#define DEF_OPT_XFERLEN_EXP 0
139#define DEF_PTYPE TYPE_DISK
140#define DEF_RANDOM false
141#define DEF_REMOVABLE false
142#define DEF_SCSI_LEVEL 7 /* INQUIRY, byte2 [6->SPC-4; 7->SPC-5] */
143#define DEF_SECTOR_SIZE 512
144#define DEF_UNMAP_ALIGNMENT 0
145#define DEF_UNMAP_GRANULARITY 1
146#define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
147#define DEF_UNMAP_MAX_DESC 256
148#define DEF_VIRTUAL_GB 0
149#define DEF_VPD_USE_HOSTNO 1
150#define DEF_WRITESAME_LENGTH 0xFFFF
151#define DEF_STRICT 0
152#define DEF_STATISTICS false
153#define DEF_SUBMIT_QUEUES 1
154#define DEF_TUR_MS_TO_READY 0
155#define DEF_UUID_CTL 0
156#define JDELAY_OVERRIDDEN -9999
157
158/* Default parameters for ZBC drives */
159#define DEF_ZBC_ZONE_SIZE_MB 128
160#define DEF_ZBC_MAX_OPEN_ZONES 8
161#define DEF_ZBC_NR_CONV_ZONES 1
162
163#define SDEBUG_LUN_0_VAL 0
164
165/* bit mask values for sdebug_opts */
166#define SDEBUG_OPT_NOISE 1
167#define SDEBUG_OPT_MEDIUM_ERR 2
168#define SDEBUG_OPT_TIMEOUT 4
169#define SDEBUG_OPT_RECOVERED_ERR 8
170#define SDEBUG_OPT_TRANSPORT_ERR 16
171#define SDEBUG_OPT_DIF_ERR 32
172#define SDEBUG_OPT_DIX_ERR 64
173#define SDEBUG_OPT_MAC_TIMEOUT 128
174#define SDEBUG_OPT_SHORT_TRANSFER 0x100
175#define SDEBUG_OPT_Q_NOISE 0x200
176#define SDEBUG_OPT_ALL_TSF 0x400
177#define SDEBUG_OPT_RARE_TSF 0x800
178#define SDEBUG_OPT_N_WCE 0x1000
179#define SDEBUG_OPT_RESET_NOISE 0x2000
180#define SDEBUG_OPT_NO_CDB_NOISE 0x4000
181#define SDEBUG_OPT_HOST_BUSY 0x8000
182#define SDEBUG_OPT_CMD_ABORT 0x10000
183#define SDEBUG_OPT_ALL_NOISE (SDEBUG_OPT_NOISE | SDEBUG_OPT_Q_NOISE | \
184 SDEBUG_OPT_RESET_NOISE)
185#define SDEBUG_OPT_ALL_INJECTING (SDEBUG_OPT_RECOVERED_ERR | \
186 SDEBUG_OPT_TRANSPORT_ERR | \
187 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR | \
188 SDEBUG_OPT_SHORT_TRANSFER | \
189 SDEBUG_OPT_HOST_BUSY | \
190 SDEBUG_OPT_CMD_ABORT)
191#define SDEBUG_OPT_RECOV_DIF_DIX (SDEBUG_OPT_RECOVERED_ERR | \
192 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR)
193
194/* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs) are returned in
195 * priority order. In the subset implemented here lower numbers have higher
196 * priority. The UA numbers should be a sequence starting from 0 with
197 * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */
198#define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */
199#define SDEBUG_UA_BUS_RESET 1
200#define SDEBUG_UA_MODE_CHANGED 2
201#define SDEBUG_UA_CAPACITY_CHANGED 3
202#define SDEBUG_UA_LUNS_CHANGED 4
203#define SDEBUG_UA_MICROCODE_CHANGED 5 /* simulate firmware change */
204#define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 6
205#define SDEBUG_NUM_UAS 7
206
207/* when 1==SDEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
208 * sector on read commands: */
209#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
210#define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
211
212/* SDEBUG_CANQUEUE is the maximum number of commands that can be queued
213 * (for response) per submit queue at one time. Can be reduced by max_queue
214 * option. Command responses are not queued when jdelay=0 and ndelay=0. The
215 * per-device DEF_CMD_PER_LUN can be changed via sysfs:
216 * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth
217 * but cannot exceed SDEBUG_CANQUEUE .
218 */
219#define SDEBUG_CANQUEUE_WORDS 3 /* a WORD is bits in a long */
220#define SDEBUG_CANQUEUE (SDEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
221#define DEF_CMD_PER_LUN SDEBUG_CANQUEUE
222
223/* UA - Unit Attention; SA - Service Action; SSU - Start Stop Unit */
224#define F_D_IN 1 /* Data-in command (e.g. READ) */
225#define F_D_OUT 2 /* Data-out command (e.g. WRITE) */
226#define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */
227#define F_D_UNKN 8
228#define F_RL_WLUN_OK 0x10 /* allowed with REPORT LUNS W-LUN */
229#define F_SKIP_UA 0x20 /* bypass UAs (e.g. INQUIRY command) */
230#define F_DELAY_OVERR 0x40 /* for commands like INQUIRY */
231#define F_SA_LOW 0x80 /* SA is in cdb byte 1, bits 4 to 0 */
232#define F_SA_HIGH 0x100 /* SA is in cdb bytes 8 and 9 */
233#define F_INV_OP 0x200 /* invalid opcode (not supported) */
234#define F_FAKE_RW 0x400 /* bypass resp_*() when fake_rw set */
235#define F_M_ACCESS 0x800 /* media access, reacts to SSU state */
236#define F_SSU_DELAY 0x1000 /* SSU command delay (long-ish) */
237#define F_SYNC_DELAY 0x2000 /* SYNCHRONIZE CACHE delay */
238
239/* Useful combinations of the above flags */
240#define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR)
241#define FF_MEDIA_IO (F_M_ACCESS | F_FAKE_RW)
242#define FF_SA (F_SA_HIGH | F_SA_LOW)
243#define F_LONG_DELAY (F_SSU_DELAY | F_SYNC_DELAY)
244
245#define SDEBUG_MAX_PARTS 4
246
247#define SDEBUG_MAX_CMD_LEN 32
248
249#define SDEB_XA_NOT_IN_USE XA_MARK_1
250
251/* Zone types (zbcr05 table 25) */
252enum sdebug_z_type {
253 ZBC_ZONE_TYPE_CNV = 0x1,
254 ZBC_ZONE_TYPE_SWR = 0x2,
255 ZBC_ZONE_TYPE_SWP = 0x3,
256};
257
258/* enumeration names taken from table 26, zbcr05 */
259enum sdebug_z_cond {
260 ZBC_NOT_WRITE_POINTER = 0x0,
261 ZC1_EMPTY = 0x1,
262 ZC2_IMPLICIT_OPEN = 0x2,
263 ZC3_EXPLICIT_OPEN = 0x3,
264 ZC4_CLOSED = 0x4,
265 ZC6_READ_ONLY = 0xd,
266 ZC5_FULL = 0xe,
267 ZC7_OFFLINE = 0xf,
268};
269
270struct sdeb_zone_state { /* ZBC: per zone state */
271 enum sdebug_z_type z_type;
272 enum sdebug_z_cond z_cond;
273 bool z_non_seq_resource;
274 unsigned int z_size;
275 sector_t z_start;
276 sector_t z_wp;
277};
278
279struct sdebug_dev_info {
280 struct list_head dev_list;
281 unsigned int channel;
282 unsigned int target;
283 u64 lun;
284 uuid_t lu_name;
285 struct sdebug_host_info *sdbg_host;
286 unsigned long uas_bm[1];
287 atomic_t num_in_q;
288 atomic_t stopped; /* 1: by SSU, 2: device start */
289 bool used;
290
291 /* For ZBC devices */
292 enum blk_zoned_model zmodel;
293 unsigned int zsize;
294 unsigned int zsize_shift;
295 unsigned int nr_zones;
296 unsigned int nr_conv_zones;
297 unsigned int nr_imp_open;
298 unsigned int nr_exp_open;
299 unsigned int nr_closed;
300 unsigned int max_open;
301 ktime_t create_ts; /* time since bootup that this device was created */
302 struct sdeb_zone_state *zstate;
303};
304
305struct sdebug_host_info {
306 struct list_head host_list;
307 int si_idx; /* sdeb_store_info (per host) xarray index */
308 struct Scsi_Host *shost;
309 struct device dev;
310 struct list_head dev_info_list;
311};
312
313/* There is an xarray of pointers to this struct's objects, one per host */
314struct sdeb_store_info {
315 rwlock_t macc_lck; /* for atomic media access on this store */
316 u8 *storep; /* user data storage (ram) */
317 struct t10_pi_tuple *dif_storep; /* protection info */
318 void *map_storep; /* provisioning map */
319};
320
321#define to_sdebug_host(d) \
322 container_of(d, struct sdebug_host_info, dev)
323
324enum sdeb_defer_type {SDEB_DEFER_NONE = 0, SDEB_DEFER_HRT = 1,
325 SDEB_DEFER_WQ = 2, SDEB_DEFER_POLL = 3};
326
327struct sdebug_defer {
328 struct hrtimer hrt;
329 struct execute_work ew;
330 ktime_t cmpl_ts;/* time since boot to complete this cmd */
331 int sqa_idx; /* index of sdebug_queue array */
332 int qc_idx; /* index of sdebug_queued_cmd array within sqa_idx */
333 int hc_idx; /* hostwide tag index */
334 int issuing_cpu;
335 bool init_hrt;
336 bool init_wq;
337 bool init_poll;
338 bool aborted; /* true when blk_abort_request() already called */
339 enum sdeb_defer_type defer_t;
340};
341
342struct sdebug_queued_cmd {
343 /* corresponding bit set in in_use_bm[] in owning struct sdebug_queue
344 * instance indicates this slot is in use.
345 */
346 struct sdebug_defer *sd_dp;
347 struct scsi_cmnd *a_cmnd;
348};
349
350struct sdebug_queue {
351 struct sdebug_queued_cmd qc_arr[SDEBUG_CANQUEUE];
352 unsigned long in_use_bm[SDEBUG_CANQUEUE_WORDS];
353 spinlock_t qc_lock;
354 atomic_t blocked; /* to temporarily stop more being queued */
355};
356
357static atomic_t sdebug_cmnd_count; /* number of incoming commands */
358static atomic_t sdebug_completions; /* count of deferred completions */
359static atomic_t sdebug_miss_cpus; /* submission + completion cpus differ */
360static atomic_t sdebug_a_tsf; /* 'almost task set full' counter */
361static atomic_t sdeb_inject_pending;
362static atomic_t sdeb_mq_poll_count; /* bumped when mq_poll returns > 0 */
363
364struct opcode_info_t {
365 u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff */
366 /* for terminating element */
367 u8 opcode; /* if num_attached > 0, preferred */
368 u16 sa; /* service action */
369 u32 flags; /* OR-ed set of SDEB_F_* */
370 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
371 const struct opcode_info_t *arrp; /* num_attached elements or NULL */
372 u8 len_mask[16]; /* len_mask[0]-->cdb_len, then mask for cdb */
373 /* 1 to min(cdb_len, 15); ignore cdb[15...] */
374};
375
376/* SCSI opcodes (first byte of cdb) of interest mapped onto these indexes */
377enum sdeb_opcode_index {
378 SDEB_I_INVALID_OPCODE = 0,
379 SDEB_I_INQUIRY = 1,
380 SDEB_I_REPORT_LUNS = 2,
381 SDEB_I_REQUEST_SENSE = 3,
382 SDEB_I_TEST_UNIT_READY = 4,
383 SDEB_I_MODE_SENSE = 5, /* 6, 10 */
384 SDEB_I_MODE_SELECT = 6, /* 6, 10 */
385 SDEB_I_LOG_SENSE = 7,
386 SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */
387 SDEB_I_READ = 9, /* 6, 10, 12, 16 */
388 SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */
389 SDEB_I_START_STOP = 11,
390 SDEB_I_SERV_ACT_IN_16 = 12, /* add ...SERV_ACT_IN_12 if needed */
391 SDEB_I_SERV_ACT_OUT_16 = 13, /* add ...SERV_ACT_OUT_12 if needed */
392 SDEB_I_MAINT_IN = 14,
393 SDEB_I_MAINT_OUT = 15,
394 SDEB_I_VERIFY = 16, /* VERIFY(10), VERIFY(16) */
395 SDEB_I_VARIABLE_LEN = 17, /* READ(32), WRITE(32), WR_SCAT(32) */
396 SDEB_I_RESERVE = 18, /* 6, 10 */
397 SDEB_I_RELEASE = 19, /* 6, 10 */
398 SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
399 SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */
400 SDEB_I_ATA_PT = 22, /* 12, 16 */
401 SDEB_I_SEND_DIAG = 23,
402 SDEB_I_UNMAP = 24,
403 SDEB_I_WRITE_BUFFER = 25,
404 SDEB_I_WRITE_SAME = 26, /* 10, 16 */
405 SDEB_I_SYNC_CACHE = 27, /* 10, 16 */
406 SDEB_I_COMP_WRITE = 28,
407 SDEB_I_PRE_FETCH = 29, /* 10, 16 */
408 SDEB_I_ZONE_OUT = 30, /* 0x94+SA; includes no data xfer */
409 SDEB_I_ZONE_IN = 31, /* 0x95+SA; all have data-in */
410 SDEB_I_LAST_ELEM_P1 = 32, /* keep this last (previous + 1) */
411};
412
413
414static const unsigned char opcode_ind_arr[256] = {
415/* 0x0; 0x0->0x1f: 6 byte cdbs */
416 SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE,
417 0, 0, 0, 0,
418 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0,
419 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
420 SDEB_I_RELEASE,
421 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG,
422 SDEB_I_ALLOW_REMOVAL, 0,
423/* 0x20; 0x20->0x3f: 10 byte cdbs */
424 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0,
425 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY,
426 0, 0, 0, 0, SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, 0,
427 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0,
428/* 0x40; 0x40->0x5f: 10 byte cdbs */
429 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0,
430 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0,
431 0, 0, 0, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
432 SDEB_I_RELEASE,
433 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0,
434/* 0x60; 0x60->0x7d are reserved, 0x7e is "extended cdb" */
435 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
436 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
437 0, SDEB_I_VARIABLE_LEN,
438/* 0x80; 0x80->0x9f: 16 byte cdbs */
439 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0,
440 SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0,
441 0, 0, 0, SDEB_I_VERIFY,
442 SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, SDEB_I_WRITE_SAME,
443 SDEB_I_ZONE_OUT, SDEB_I_ZONE_IN, 0, 0,
444 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN_16, SDEB_I_SERV_ACT_OUT_16,
445/* 0xa0; 0xa0->0xbf: 12 byte cdbs */
446 SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN,
447 SDEB_I_MAINT_OUT, 0, 0, 0,
448 SDEB_I_READ, 0 /* SDEB_I_SERV_ACT_OUT_12 */, SDEB_I_WRITE,
449 0 /* SDEB_I_SERV_ACT_IN_12 */, 0, 0, 0, 0,
450 0, 0, 0, 0, 0, 0, 0, 0,
451 0, 0, 0, 0, 0, 0, 0, 0,
452/* 0xc0; 0xc0->0xff: vendor specific */
453 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
454 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
455 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
456 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
457};
458
459/*
460 * The following "response" functions return the SCSI mid-level's 4 byte
461 * tuple-in-an-int. To handle commands with an IMMED bit, for a faster
462 * command completion, they can mask their return value with
463 * SDEG_RES_IMMED_MASK .
464 */
465#define SDEG_RES_IMMED_MASK 0x40000000
466
467static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *);
468static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *);
469static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *);
470static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
471static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *);
472static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
473static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
474static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
475static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
476static int resp_write_scat(struct scsi_cmnd *, struct sdebug_dev_info *);
477static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
478static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
479static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
480static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *);
481static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *);
482static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *);
483static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *);
484static int resp_verify(struct scsi_cmnd *, struct sdebug_dev_info *);
485static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *);
486static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *);
487static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
488static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *);
489static int resp_sync_cache(struct scsi_cmnd *, struct sdebug_dev_info *);
490static int resp_pre_fetch(struct scsi_cmnd *, struct sdebug_dev_info *);
491static int resp_report_zones(struct scsi_cmnd *, struct sdebug_dev_info *);
492static int resp_open_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
493static int resp_close_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
494static int resp_finish_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
495static int resp_rwp_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
496
497static int sdebug_do_add_host(bool mk_new_store);
498static int sdebug_add_host_helper(int per_host_idx);
499static void sdebug_do_remove_host(bool the_end);
500static int sdebug_add_store(void);
501static void sdebug_erase_store(int idx, struct sdeb_store_info *sip);
502static void sdebug_erase_all_stores(bool apart_from_first);
503
504/*
505 * The following are overflow arrays for cdbs that "hit" the same index in
506 * the opcode_info_arr array. The most time sensitive (or commonly used) cdb
507 * should be placed in opcode_info_arr[], the others should be placed here.
508 */
509static const struct opcode_info_t msense_iarr[] = {
510 {0, 0x1a, 0, F_D_IN, NULL, NULL,
511 {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
512};
513
514static const struct opcode_info_t mselect_iarr[] = {
515 {0, 0x15, 0, F_D_OUT, NULL, NULL,
516 {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
517};
518
519static const struct opcode_info_t read_iarr[] = {
520 {0, 0x28, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(10) */
521 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
522 0, 0, 0, 0} },
523 {0, 0x8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL, /* READ(6) */
524 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
525 {0, 0xa8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(12) */
526 {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf,
527 0xc7, 0, 0, 0, 0} },
528};
529
530static const struct opcode_info_t write_iarr[] = {
531 {0, 0x2a, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(10) */
532 NULL, {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7,
533 0, 0, 0, 0, 0, 0} },
534 {0, 0xa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(6) */
535 NULL, {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0,
536 0, 0, 0} },
537 {0, 0xaa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(12) */
538 NULL, {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
539 0xbf, 0xc7, 0, 0, 0, 0} },
540};
541
542static const struct opcode_info_t verify_iarr[] = {
543 {0, 0x2f, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify,/* VERIFY(10) */
544 NULL, {10, 0xf7, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xff, 0xff, 0xc7,
545 0, 0, 0, 0, 0, 0} },
546};
547
548static const struct opcode_info_t sa_in_16_iarr[] = {
549 {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL,
550 {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
551 0xff, 0xff, 0xff, 0, 0xc7} }, /* GET LBA STATUS(16) */
552};
553
554static const struct opcode_info_t vl_iarr[] = { /* VARIABLE LENGTH */
555 {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_dt0,
556 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0xb, 0xfa,
557 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
558 {0, 0x7f, 0x11, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
559 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x11, 0xf8,
560 0, 0xff, 0xff, 0x0, 0x0} }, /* WRITE SCATTERED(32) */
561};
562
563static const struct opcode_info_t maint_in_iarr[] = { /* MAINT IN */
564 {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL,
565 {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
566 0xc7, 0, 0, 0, 0} }, /* REPORT SUPPORTED OPERATION CODES */
567 {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL,
568 {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
569 0, 0} }, /* REPORTED SUPPORTED TASK MANAGEMENT FUNCTIONS */
570};
571
572static const struct opcode_info_t write_same_iarr[] = {
573 {0, 0x93, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_write_same_16, NULL,
574 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
575 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* WRITE SAME(16) */
576};
577
578static const struct opcode_info_t reserve_iarr[] = {
579 {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */
580 {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
581};
582
583static const struct opcode_info_t release_iarr[] = {
584 {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */
585 {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
586};
587
588static const struct opcode_info_t sync_cache_iarr[] = {
589 {0, 0x91, 0, F_SYNC_DELAY | F_M_ACCESS, resp_sync_cache, NULL,
590 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
591 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* SYNC_CACHE (16) */
592};
593
594static const struct opcode_info_t pre_fetch_iarr[] = {
595 {0, 0x90, 0, F_SYNC_DELAY | FF_MEDIA_IO, resp_pre_fetch, NULL,
596 {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
597 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* PRE-FETCH (16) */
598};
599
600static const struct opcode_info_t zone_out_iarr[] = { /* ZONE OUT(16) */
601 {0, 0x94, 0x1, F_SA_LOW | F_M_ACCESS, resp_close_zone, NULL,
602 {16, 0x1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
603 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* CLOSE ZONE */
604 {0, 0x94, 0x2, F_SA_LOW | F_M_ACCESS, resp_finish_zone, NULL,
605 {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
606 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* FINISH ZONE */
607 {0, 0x94, 0x4, F_SA_LOW | F_M_ACCESS, resp_rwp_zone, NULL,
608 {16, 0x4, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
609 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* RESET WRITE POINTER */
610};
611
612static const struct opcode_info_t zone_in_iarr[] = { /* ZONE IN(16) */
613 {0, 0x95, 0x6, F_SA_LOW | F_D_IN | F_M_ACCESS, NULL, NULL,
614 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
615 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* REPORT ZONES */
616};
617
618
619/* This array is accessed via SDEB_I_* values. Make sure all are mapped,
620 * plus the terminating elements for logic that scans this table such as
621 * REPORT SUPPORTED OPERATION CODES. */
622static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEM_P1 + 1] = {
623/* 0 */
624 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* unknown opcodes */
625 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
626 {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL, /* INQUIRY */
627 {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
628 {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL,
629 {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
630 0, 0} }, /* REPORT LUNS */
631 {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL,
632 {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
633 {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */
634 {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
635/* 5 */
636 {ARRAY_SIZE(msense_iarr), 0x5a, 0, F_D_IN, /* MODE SENSE(10) */
637 resp_mode_sense, msense_iarr, {10, 0xf8, 0xff, 0xff, 0, 0, 0,
638 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
639 {ARRAY_SIZE(mselect_iarr), 0x55, 0, F_D_OUT, /* MODE SELECT(10) */
640 resp_mode_select, mselect_iarr, {10, 0xf1, 0, 0, 0, 0, 0, 0xff,
641 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
642 {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL, /* LOG SENSE */
643 {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0,
644 0, 0, 0} },
645 {0, 0x25, 0, F_D_IN, resp_readcap, NULL, /* READ CAPACITY(10) */
646 {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0,
647 0, 0} },
648 {ARRAY_SIZE(read_iarr), 0x88, 0, F_D_IN | FF_MEDIA_IO, /* READ(16) */
649 resp_read_dt0, read_iarr, {16, 0xfe, 0xff, 0xff, 0xff, 0xff,
650 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
651/* 10 */
652 {ARRAY_SIZE(write_iarr), 0x8a, 0, F_D_OUT | FF_MEDIA_IO,
653 resp_write_dt0, write_iarr, /* WRITE(16) */
654 {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
655 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
656 {0, 0x1b, 0, F_SSU_DELAY, resp_start_stop, NULL,/* START STOP UNIT */
657 {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
658 {ARRAY_SIZE(sa_in_16_iarr), 0x9e, 0x10, F_SA_LOW | F_D_IN,
659 resp_readcap16, sa_in_16_iarr, /* SA_IN(16), READ CAPACITY(16) */
660 {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
661 0xff, 0xff, 0xff, 0xff, 0x1, 0xc7} },
662 {0, 0x9f, 0x12, F_SA_LOW | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
663 NULL, {16, 0x12, 0xf9, 0x0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff,
664 0xff, 0xff, 0xff, 0xff, 0xc7} }, /* SA_OUT(16), WRITE SCAT(16) */
665 {ARRAY_SIZE(maint_in_iarr), 0xa3, 0xa, F_SA_LOW | F_D_IN,
666 resp_report_tgtpgs, /* MAINT IN, REPORT TARGET PORT GROUPS */
667 maint_in_iarr, {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff,
668 0xff, 0, 0xc7, 0, 0, 0, 0} },
669/* 15 */
670 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */
671 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
672 {ARRAY_SIZE(verify_iarr), 0x8f, 0,
673 F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify, /* VERIFY(16) */
674 verify_iarr, {16, 0xf6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
675 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} },
676 {ARRAY_SIZE(vl_iarr), 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_MEDIA_IO,
677 resp_read_dt0, vl_iarr, /* VARIABLE LENGTH, READ(32) */
678 {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x9, 0xfe, 0, 0xff, 0xff,
679 0xff, 0xff} },
680 {ARRAY_SIZE(reserve_iarr), 0x56, 0, F_D_OUT,
681 NULL, reserve_iarr, /* RESERVE(10) <no response function> */
682 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
683 0} },
684 {ARRAY_SIZE(release_iarr), 0x57, 0, F_D_OUT,
685 NULL, release_iarr, /* RELEASE(10) <no response function> */
686 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
687 0} },
688/* 20 */
689 {0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */
690 {6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
691 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */
692 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
693 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */
694 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
695 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */
696 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
697 {0, 0x42, 0, F_D_OUT | FF_MEDIA_IO, resp_unmap, NULL, /* UNMAP */
698 {10, 0x1, 0, 0, 0, 0, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
699/* 25 */
700 {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL,
701 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0,
702 0, 0, 0, 0} }, /* WRITE_BUFFER */
703 {ARRAY_SIZE(write_same_iarr), 0x41, 0, F_D_OUT_MAYBE | FF_MEDIA_IO,
704 resp_write_same_10, write_same_iarr, /* WRITE SAME(10) */
705 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0,
706 0, 0, 0, 0, 0} },
707 {ARRAY_SIZE(sync_cache_iarr), 0x35, 0, F_SYNC_DELAY | F_M_ACCESS,
708 resp_sync_cache, sync_cache_iarr,
709 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
710 0, 0, 0, 0} }, /* SYNC_CACHE (10) */
711 {0, 0x89, 0, F_D_OUT | FF_MEDIA_IO, resp_comp_write, NULL,
712 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
713 0, 0xff, 0x3f, 0xc7} }, /* COMPARE AND WRITE */
714 {ARRAY_SIZE(pre_fetch_iarr), 0x34, 0, F_SYNC_DELAY | FF_MEDIA_IO,
715 resp_pre_fetch, pre_fetch_iarr,
716 {10, 0x2, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
717 0, 0, 0, 0} }, /* PRE-FETCH (10) */
718
719/* 30 */
720 {ARRAY_SIZE(zone_out_iarr), 0x94, 0x3, F_SA_LOW | F_M_ACCESS,
721 resp_open_zone, zone_out_iarr, /* ZONE_OUT(16), OPEN ZONE) */
722 {16, 0x3 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
723 0xff, 0xff, 0x0, 0x0, 0xff, 0xff, 0x1, 0xc7} },
724 {ARRAY_SIZE(zone_in_iarr), 0x95, 0x0, F_SA_LOW | F_M_ACCESS,
725 resp_report_zones, zone_in_iarr, /* ZONE_IN(16), REPORT ZONES) */
726 {16, 0x0 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
727 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xc7} },
728/* sentinel */
729 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */
730 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
731};
732
733static int sdebug_num_hosts;
734static int sdebug_add_host = DEF_NUM_HOST; /* in sysfs this is relative */
735static int sdebug_ato = DEF_ATO;
736static int sdebug_cdb_len = DEF_CDB_LEN;
737static int sdebug_jdelay = DEF_JDELAY; /* if > 0 then unit is jiffies */
738static int sdebug_dev_size_mb = DEF_DEV_SIZE_PRE_INIT;
739static int sdebug_dif = DEF_DIF;
740static int sdebug_dix = DEF_DIX;
741static int sdebug_dsense = DEF_D_SENSE;
742static int sdebug_every_nth = DEF_EVERY_NTH;
743static int sdebug_fake_rw = DEF_FAKE_RW;
744static unsigned int sdebug_guard = DEF_GUARD;
745static int sdebug_host_max_queue; /* per host */
746static int sdebug_lowest_aligned = DEF_LOWEST_ALIGNED;
747static int sdebug_max_luns = DEF_MAX_LUNS;
748static int sdebug_max_queue = SDEBUG_CANQUEUE; /* per submit queue */
749static unsigned int sdebug_medium_error_start = OPT_MEDIUM_ERR_ADDR;
750static int sdebug_medium_error_count = OPT_MEDIUM_ERR_NUM;
751static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */
752static int sdebug_ndelay = DEF_NDELAY; /* if > 0 then unit is nanoseconds */
753static int sdebug_no_lun_0 = DEF_NO_LUN_0;
754static int sdebug_no_uld;
755static int sdebug_num_parts = DEF_NUM_PARTS;
756static int sdebug_num_tgts = DEF_NUM_TGTS; /* targets per host */
757static int sdebug_opt_blks = DEF_OPT_BLKS;
758static int sdebug_opts = DEF_OPTS;
759static int sdebug_physblk_exp = DEF_PHYSBLK_EXP;
760static int sdebug_opt_xferlen_exp = DEF_OPT_XFERLEN_EXP;
761static int sdebug_ptype = DEF_PTYPE; /* SCSI peripheral device type */
762static int sdebug_scsi_level = DEF_SCSI_LEVEL;
763static int sdebug_sector_size = DEF_SECTOR_SIZE;
764static int sdeb_tur_ms_to_ready = DEF_TUR_MS_TO_READY;
765static int sdebug_virtual_gb = DEF_VIRTUAL_GB;
766static int sdebug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
767static unsigned int sdebug_lbpu = DEF_LBPU;
768static unsigned int sdebug_lbpws = DEF_LBPWS;
769static unsigned int sdebug_lbpws10 = DEF_LBPWS10;
770static unsigned int sdebug_lbprz = DEF_LBPRZ;
771static unsigned int sdebug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
772static unsigned int sdebug_unmap_granularity = DEF_UNMAP_GRANULARITY;
773static unsigned int sdebug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
774static unsigned int sdebug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
775static unsigned int sdebug_write_same_length = DEF_WRITESAME_LENGTH;
776static int sdebug_uuid_ctl = DEF_UUID_CTL;
777static bool sdebug_random = DEF_RANDOM;
778static bool sdebug_per_host_store = DEF_PER_HOST_STORE;
779static bool sdebug_removable = DEF_REMOVABLE;
780static bool sdebug_clustering;
781static bool sdebug_host_lock = DEF_HOST_LOCK;
782static bool sdebug_strict = DEF_STRICT;
783static bool sdebug_any_injecting_opt;
784static bool sdebug_verbose;
785static bool have_dif_prot;
786static bool write_since_sync;
787static bool sdebug_statistics = DEF_STATISTICS;
788static bool sdebug_wp;
789/* Following enum: 0: no zbc, def; 1: host aware; 2: host managed */
790static enum blk_zoned_model sdeb_zbc_model = BLK_ZONED_NONE;
791static char *sdeb_zbc_model_s;
792
793enum sam_lun_addr_method {SAM_LUN_AM_PERIPHERAL = 0x0,
794 SAM_LUN_AM_FLAT = 0x1,
795 SAM_LUN_AM_LOGICAL_UNIT = 0x2,
796 SAM_LUN_AM_EXTENDED = 0x3};
797static enum sam_lun_addr_method sdebug_lun_am = SAM_LUN_AM_PERIPHERAL;
798static int sdebug_lun_am_i = (int)SAM_LUN_AM_PERIPHERAL;
799
800static unsigned int sdebug_store_sectors;
801static sector_t sdebug_capacity; /* in sectors */
802
803/* old BIOS stuff, kernel may get rid of them but some mode sense pages
804 may still need them */
805static int sdebug_heads; /* heads per disk */
806static int sdebug_cylinders_per; /* cylinders per surface */
807static int sdebug_sectors_per; /* sectors per cylinder */
808
809static LIST_HEAD(sdebug_host_list);
810static DEFINE_SPINLOCK(sdebug_host_list_lock);
811
812static struct xarray per_store_arr;
813static struct xarray *per_store_ap = &per_store_arr;
814static int sdeb_first_idx = -1; /* invalid index ==> none created */
815static int sdeb_most_recent_idx = -1;
816static DEFINE_RWLOCK(sdeb_fake_rw_lck); /* need a RW lock when fake_rw=1 */
817
818static unsigned long map_size;
819static int num_aborts;
820static int num_dev_resets;
821static int num_target_resets;
822static int num_bus_resets;
823static int num_host_resets;
824static int dix_writes;
825static int dix_reads;
826static int dif_errors;
827
828/* ZBC global data */
829static bool sdeb_zbc_in_use; /* true for host-aware and host-managed disks */
830static int sdeb_zbc_zone_size_mb;
831static int sdeb_zbc_max_open = DEF_ZBC_MAX_OPEN_ZONES;
832static int sdeb_zbc_nr_conv = DEF_ZBC_NR_CONV_ZONES;
833
834static int submit_queues = DEF_SUBMIT_QUEUES; /* > 1 for multi-queue (mq) */
835static int poll_queues; /* iouring iopoll interface.*/
836static struct sdebug_queue *sdebug_q_arr; /* ptr to array of submit queues */
837
838static DEFINE_RWLOCK(atomic_rw);
839static DEFINE_RWLOCK(atomic_rw2);
840
841static rwlock_t *ramdisk_lck_a[2];
842
843static char sdebug_proc_name[] = MY_NAME;
844static const char *my_name = MY_NAME;
845
846static struct bus_type pseudo_lld_bus;
847
848static struct device_driver sdebug_driverfs_driver = {
849 .name = sdebug_proc_name,
850 .bus = &pseudo_lld_bus,
851};
852
853static const int check_condition_result =
854 SAM_STAT_CHECK_CONDITION;
855
856static const int illegal_condition_result =
857 (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
858
859static const int device_qfull_result =
860 (DID_OK << 16) | SAM_STAT_TASK_SET_FULL;
861
862static const int condition_met_result = SAM_STAT_CONDITION_MET;
863
864
865/* Only do the extra work involved in logical block provisioning if one or
866 * more of the lbpu, lbpws or lbpws10 parameters are given and we are doing
867 * real reads and writes (i.e. not skipping them for speed).
868 */
869static inline bool scsi_debug_lbp(void)
870{
871 return 0 == sdebug_fake_rw &&
872 (sdebug_lbpu || sdebug_lbpws || sdebug_lbpws10);
873}
874
875static void *lba2fake_store(struct sdeb_store_info *sip,
876 unsigned long long lba)
877{
878 struct sdeb_store_info *lsip = sip;
879
880 lba = do_div(lba, sdebug_store_sectors);
881 if (!sip || !sip->storep) {
882 WARN_ON_ONCE(true);
883 lsip = xa_load(per_store_ap, 0); /* should never be NULL */
884 }
885 return lsip->storep + lba * sdebug_sector_size;
886}
887
888static struct t10_pi_tuple *dif_store(struct sdeb_store_info *sip,
889 sector_t sector)
890{
891 sector = sector_div(sector, sdebug_store_sectors);
892
893 return sip->dif_storep + sector;
894}
895
896static void sdebug_max_tgts_luns(void)
897{
898 struct sdebug_host_info *sdbg_host;
899 struct Scsi_Host *hpnt;
900
901 spin_lock(&sdebug_host_list_lock);
902 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
903 hpnt = sdbg_host->shost;
904 if ((hpnt->this_id >= 0) &&
905 (sdebug_num_tgts > hpnt->this_id))
906 hpnt->max_id = sdebug_num_tgts + 1;
907 else
908 hpnt->max_id = sdebug_num_tgts;
909 /* sdebug_max_luns; */
910 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
911 }
912 spin_unlock(&sdebug_host_list_lock);
913}
914
915enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
916
917/* Set in_bit to -1 to indicate no bit position of invalid field */
918static void mk_sense_invalid_fld(struct scsi_cmnd *scp,
919 enum sdeb_cmd_data c_d,
920 int in_byte, int in_bit)
921{
922 unsigned char *sbuff;
923 u8 sks[4];
924 int sl, asc;
925
926 sbuff = scp->sense_buffer;
927 if (!sbuff) {
928 sdev_printk(KERN_ERR, scp->device,
929 "%s: sense_buffer is NULL\n", __func__);
930 return;
931 }
932 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
933 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
934 scsi_build_sense(scp, sdebug_dsense, ILLEGAL_REQUEST, asc, 0);
935 memset(sks, 0, sizeof(sks));
936 sks[0] = 0x80;
937 if (c_d)
938 sks[0] |= 0x40;
939 if (in_bit >= 0) {
940 sks[0] |= 0x8;
941 sks[0] |= 0x7 & in_bit;
942 }
943 put_unaligned_be16(in_byte, sks + 1);
944 if (sdebug_dsense) {
945 sl = sbuff[7] + 8;
946 sbuff[7] = sl;
947 sbuff[sl] = 0x2;
948 sbuff[sl + 1] = 0x6;
949 memcpy(sbuff + sl + 4, sks, 3);
950 } else
951 memcpy(sbuff + 15, sks, 3);
952 if (sdebug_verbose)
953 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
954 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
955 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
956}
957
958static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
959{
960 if (!scp->sense_buffer) {
961 sdev_printk(KERN_ERR, scp->device,
962 "%s: sense_buffer is NULL\n", __func__);
963 return;
964 }
965 memset(scp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
966
967 scsi_build_sense(scp, sdebug_dsense, key, asc, asq);
968
969 if (sdebug_verbose)
970 sdev_printk(KERN_INFO, scp->device,
971 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
972 my_name, key, asc, asq);
973}
974
975static void mk_sense_invalid_opcode(struct scsi_cmnd *scp)
976{
977 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
978}
979
980static int scsi_debug_ioctl(struct scsi_device *dev, unsigned int cmd,
981 void __user *arg)
982{
983 if (sdebug_verbose) {
984 if (0x1261 == cmd)
985 sdev_printk(KERN_INFO, dev,
986 "%s: BLKFLSBUF [0x1261]\n", __func__);
987 else if (0x5331 == cmd)
988 sdev_printk(KERN_INFO, dev,
989 "%s: CDROM_GET_CAPABILITY [0x5331]\n",
990 __func__);
991 else
992 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
993 __func__, cmd);
994 }
995 return -EINVAL;
996 /* return -ENOTTY; // correct return but upsets fdisk */
997}
998
999static void config_cdb_len(struct scsi_device *sdev)
1000{
1001 switch (sdebug_cdb_len) {
1002 case 6: /* suggest 6 byte READ, WRITE and MODE SENSE/SELECT */
1003 sdev->use_10_for_rw = false;
1004 sdev->use_16_for_rw = false;
1005 sdev->use_10_for_ms = false;
1006 break;
1007 case 10: /* suggest 10 byte RWs and 6 byte MODE SENSE/SELECT */
1008 sdev->use_10_for_rw = true;
1009 sdev->use_16_for_rw = false;
1010 sdev->use_10_for_ms = false;
1011 break;
1012 case 12: /* suggest 10 byte RWs and 10 byte MODE SENSE/SELECT */
1013 sdev->use_10_for_rw = true;
1014 sdev->use_16_for_rw = false;
1015 sdev->use_10_for_ms = true;
1016 break;
1017 case 16:
1018 sdev->use_10_for_rw = false;
1019 sdev->use_16_for_rw = true;
1020 sdev->use_10_for_ms = true;
1021 break;
1022 case 32: /* No knobs to suggest this so same as 16 for now */
1023 sdev->use_10_for_rw = false;
1024 sdev->use_16_for_rw = true;
1025 sdev->use_10_for_ms = true;
1026 break;
1027 default:
1028 pr_warn("unexpected cdb_len=%d, force to 10\n",
1029 sdebug_cdb_len);
1030 sdev->use_10_for_rw = true;
1031 sdev->use_16_for_rw = false;
1032 sdev->use_10_for_ms = false;
1033 sdebug_cdb_len = 10;
1034 break;
1035 }
1036}
1037
1038static void all_config_cdb_len(void)
1039{
1040 struct sdebug_host_info *sdbg_host;
1041 struct Scsi_Host *shost;
1042 struct scsi_device *sdev;
1043
1044 spin_lock(&sdebug_host_list_lock);
1045 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
1046 shost = sdbg_host->shost;
1047 shost_for_each_device(sdev, shost) {
1048 config_cdb_len(sdev);
1049 }
1050 }
1051 spin_unlock(&sdebug_host_list_lock);
1052}
1053
1054static void clear_luns_changed_on_target(struct sdebug_dev_info *devip)
1055{
1056 struct sdebug_host_info *sdhp;
1057 struct sdebug_dev_info *dp;
1058
1059 spin_lock(&sdebug_host_list_lock);
1060 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
1061 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
1062 if ((devip->sdbg_host == dp->sdbg_host) &&
1063 (devip->target == dp->target))
1064 clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
1065 }
1066 }
1067 spin_unlock(&sdebug_host_list_lock);
1068}
1069
1070static int make_ua(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1071{
1072 int k;
1073
1074 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
1075 if (k != SDEBUG_NUM_UAS) {
1076 const char *cp = NULL;
1077
1078 switch (k) {
1079 case SDEBUG_UA_POR:
1080 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
1081 POWER_ON_RESET_ASCQ);
1082 if (sdebug_verbose)
1083 cp = "power on reset";
1084 break;
1085 case SDEBUG_UA_BUS_RESET:
1086 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
1087 BUS_RESET_ASCQ);
1088 if (sdebug_verbose)
1089 cp = "bus reset";
1090 break;
1091 case SDEBUG_UA_MODE_CHANGED:
1092 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
1093 MODE_CHANGED_ASCQ);
1094 if (sdebug_verbose)
1095 cp = "mode parameters changed";
1096 break;
1097 case SDEBUG_UA_CAPACITY_CHANGED:
1098 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
1099 CAPACITY_CHANGED_ASCQ);
1100 if (sdebug_verbose)
1101 cp = "capacity data changed";
1102 break;
1103 case SDEBUG_UA_MICROCODE_CHANGED:
1104 mk_sense_buffer(scp, UNIT_ATTENTION,
1105 TARGET_CHANGED_ASC,
1106 MICROCODE_CHANGED_ASCQ);
1107 if (sdebug_verbose)
1108 cp = "microcode has been changed";
1109 break;
1110 case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET:
1111 mk_sense_buffer(scp, UNIT_ATTENTION,
1112 TARGET_CHANGED_ASC,
1113 MICROCODE_CHANGED_WO_RESET_ASCQ);
1114 if (sdebug_verbose)
1115 cp = "microcode has been changed without reset";
1116 break;
1117 case SDEBUG_UA_LUNS_CHANGED:
1118 /*
1119 * SPC-3 behavior is to report a UNIT ATTENTION with
1120 * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN
1121 * on the target, until a REPORT LUNS command is
1122 * received. SPC-4 behavior is to report it only once.
1123 * NOTE: sdebug_scsi_level does not use the same
1124 * values as struct scsi_device->scsi_level.
1125 */
1126 if (sdebug_scsi_level >= 6) /* SPC-4 and above */
1127 clear_luns_changed_on_target(devip);
1128 mk_sense_buffer(scp, UNIT_ATTENTION,
1129 TARGET_CHANGED_ASC,
1130 LUNS_CHANGED_ASCQ);
1131 if (sdebug_verbose)
1132 cp = "reported luns data has changed";
1133 break;
1134 default:
1135 pr_warn("unexpected unit attention code=%d\n", k);
1136 if (sdebug_verbose)
1137 cp = "unknown";
1138 break;
1139 }
1140 clear_bit(k, devip->uas_bm);
1141 if (sdebug_verbose)
1142 sdev_printk(KERN_INFO, scp->device,
1143 "%s reports: Unit attention: %s\n",
1144 my_name, cp);
1145 return check_condition_result;
1146 }
1147 return 0;
1148}
1149
1150/* Build SCSI "data-in" buffer. Returns 0 if ok else (DID_ERROR << 16). */
1151static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1152 int arr_len)
1153{
1154 int act_len;
1155 struct scsi_data_buffer *sdb = &scp->sdb;
1156
1157 if (!sdb->length)
1158 return 0;
1159 if (scp->sc_data_direction != DMA_FROM_DEVICE)
1160 return DID_ERROR << 16;
1161
1162 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
1163 arr, arr_len);
1164 scsi_set_resid(scp, scsi_bufflen(scp) - act_len);
1165
1166 return 0;
1167}
1168
1169/* Partial build of SCSI "data-in" buffer. Returns 0 if ok else
1170 * (DID_ERROR << 16). Can write to offset in data-in buffer. If multiple
1171 * calls, not required to write in ascending offset order. Assumes resid
1172 * set to scsi_bufflen() prior to any calls.
1173 */
1174static int p_fill_from_dev_buffer(struct scsi_cmnd *scp, const void *arr,
1175 int arr_len, unsigned int off_dst)
1176{
1177 unsigned int act_len, n;
1178 struct scsi_data_buffer *sdb = &scp->sdb;
1179 off_t skip = off_dst;
1180
1181 if (sdb->length <= off_dst)
1182 return 0;
1183 if (scp->sc_data_direction != DMA_FROM_DEVICE)
1184 return DID_ERROR << 16;
1185
1186 act_len = sg_pcopy_from_buffer(sdb->table.sgl, sdb->table.nents,
1187 arr, arr_len, skip);
1188 pr_debug("%s: off_dst=%u, scsi_bufflen=%u, act_len=%u, resid=%d\n",
1189 __func__, off_dst, scsi_bufflen(scp), act_len,
1190 scsi_get_resid(scp));
1191 n = scsi_bufflen(scp) - (off_dst + act_len);
1192 scsi_set_resid(scp, min_t(int, scsi_get_resid(scp), n));
1193 return 0;
1194}
1195
1196/* Fetches from SCSI "data-out" buffer. Returns number of bytes fetched into
1197 * 'arr' or -1 if error.
1198 */
1199static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1200 int arr_len)
1201{
1202 if (!scsi_bufflen(scp))
1203 return 0;
1204 if (scp->sc_data_direction != DMA_TO_DEVICE)
1205 return -1;
1206
1207 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
1208}
1209
1210
1211static char sdebug_inq_vendor_id[9] = "Linux ";
1212static char sdebug_inq_product_id[17] = "scsi_debug ";
1213static char sdebug_inq_product_rev[5] = SDEBUG_VERSION;
1214/* Use some locally assigned NAAs for SAS addresses. */
1215static const u64 naa3_comp_a = 0x3222222000000000ULL;
1216static const u64 naa3_comp_b = 0x3333333000000000ULL;
1217static const u64 naa3_comp_c = 0x3111111000000000ULL;
1218
1219/* Device identification VPD page. Returns number of bytes placed in arr */
1220static int inquiry_vpd_83(unsigned char *arr, int port_group_id,
1221 int target_dev_id, int dev_id_num,
1222 const char *dev_id_str, int dev_id_str_len,
1223 const uuid_t *lu_name)
1224{
1225 int num, port_a;
1226 char b[32];
1227
1228 port_a = target_dev_id + 1;
1229 /* T10 vendor identifier field format (faked) */
1230 arr[0] = 0x2; /* ASCII */
1231 arr[1] = 0x1;
1232 arr[2] = 0x0;
1233 memcpy(&arr[4], sdebug_inq_vendor_id, 8);
1234 memcpy(&arr[12], sdebug_inq_product_id, 16);
1235 memcpy(&arr[28], dev_id_str, dev_id_str_len);
1236 num = 8 + 16 + dev_id_str_len;
1237 arr[3] = num;
1238 num += 4;
1239 if (dev_id_num >= 0) {
1240 if (sdebug_uuid_ctl) {
1241 /* Locally assigned UUID */
1242 arr[num++] = 0x1; /* binary (not necessarily sas) */
1243 arr[num++] = 0xa; /* PIV=0, lu, naa */
1244 arr[num++] = 0x0;
1245 arr[num++] = 0x12;
1246 arr[num++] = 0x10; /* uuid type=1, locally assigned */
1247 arr[num++] = 0x0;
1248 memcpy(arr + num, lu_name, 16);
1249 num += 16;
1250 } else {
1251 /* NAA-3, Logical unit identifier (binary) */
1252 arr[num++] = 0x1; /* binary (not necessarily sas) */
1253 arr[num++] = 0x3; /* PIV=0, lu, naa */
1254 arr[num++] = 0x0;
1255 arr[num++] = 0x8;
1256 put_unaligned_be64(naa3_comp_b + dev_id_num, arr + num);
1257 num += 8;
1258 }
1259 /* Target relative port number */
1260 arr[num++] = 0x61; /* proto=sas, binary */
1261 arr[num++] = 0x94; /* PIV=1, target port, rel port */
1262 arr[num++] = 0x0; /* reserved */
1263 arr[num++] = 0x4; /* length */
1264 arr[num++] = 0x0; /* reserved */
1265 arr[num++] = 0x0; /* reserved */
1266 arr[num++] = 0x0;
1267 arr[num++] = 0x1; /* relative port A */
1268 }
1269 /* NAA-3, Target port identifier */
1270 arr[num++] = 0x61; /* proto=sas, binary */
1271 arr[num++] = 0x93; /* piv=1, target port, naa */
1272 arr[num++] = 0x0;
1273 arr[num++] = 0x8;
1274 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1275 num += 8;
1276 /* NAA-3, Target port group identifier */
1277 arr[num++] = 0x61; /* proto=sas, binary */
1278 arr[num++] = 0x95; /* piv=1, target port group id */
1279 arr[num++] = 0x0;
1280 arr[num++] = 0x4;
1281 arr[num++] = 0;
1282 arr[num++] = 0;
1283 put_unaligned_be16(port_group_id, arr + num);
1284 num += 2;
1285 /* NAA-3, Target device identifier */
1286 arr[num++] = 0x61; /* proto=sas, binary */
1287 arr[num++] = 0xa3; /* piv=1, target device, naa */
1288 arr[num++] = 0x0;
1289 arr[num++] = 0x8;
1290 put_unaligned_be64(naa3_comp_a + target_dev_id, arr + num);
1291 num += 8;
1292 /* SCSI name string: Target device identifier */
1293 arr[num++] = 0x63; /* proto=sas, UTF-8 */
1294 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
1295 arr[num++] = 0x0;
1296 arr[num++] = 24;
1297 memcpy(arr + num, "naa.32222220", 12);
1298 num += 12;
1299 snprintf(b, sizeof(b), "%08X", target_dev_id);
1300 memcpy(arr + num, b, 8);
1301 num += 8;
1302 memset(arr + num, 0, 4);
1303 num += 4;
1304 return num;
1305}
1306
1307static unsigned char vpd84_data[] = {
1308/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
1309 0x22,0x22,0x22,0x0,0xbb,0x1,
1310 0x22,0x22,0x22,0x0,0xbb,0x2,
1311};
1312
1313/* Software interface identification VPD page */
1314static int inquiry_vpd_84(unsigned char *arr)
1315{
1316 memcpy(arr, vpd84_data, sizeof(vpd84_data));
1317 return sizeof(vpd84_data);
1318}
1319
1320/* Management network addresses VPD page */
1321static int inquiry_vpd_85(unsigned char *arr)
1322{
1323 int num = 0;
1324 const char *na1 = "https://www.kernel.org/config";
1325 const char *na2 = "http://www.kernel.org/log";
1326 int plen, olen;
1327
1328 arr[num++] = 0x1; /* lu, storage config */
1329 arr[num++] = 0x0; /* reserved */
1330 arr[num++] = 0x0;
1331 olen = strlen(na1);
1332 plen = olen + 1;
1333 if (plen % 4)
1334 plen = ((plen / 4) + 1) * 4;
1335 arr[num++] = plen; /* length, null termianted, padded */
1336 memcpy(arr + num, na1, olen);
1337 memset(arr + num + olen, 0, plen - olen);
1338 num += plen;
1339
1340 arr[num++] = 0x4; /* lu, logging */
1341 arr[num++] = 0x0; /* reserved */
1342 arr[num++] = 0x0;
1343 olen = strlen(na2);
1344 plen = olen + 1;
1345 if (plen % 4)
1346 plen = ((plen / 4) + 1) * 4;
1347 arr[num++] = plen; /* length, null terminated, padded */
1348 memcpy(arr + num, na2, olen);
1349 memset(arr + num + olen, 0, plen - olen);
1350 num += plen;
1351
1352 return num;
1353}
1354
1355/* SCSI ports VPD page */
1356static int inquiry_vpd_88(unsigned char *arr, int target_dev_id)
1357{
1358 int num = 0;
1359 int port_a, port_b;
1360
1361 port_a = target_dev_id + 1;
1362 port_b = port_a + 1;
1363 arr[num++] = 0x0; /* reserved */
1364 arr[num++] = 0x0; /* reserved */
1365 arr[num++] = 0x0;
1366 arr[num++] = 0x1; /* relative port 1 (primary) */
1367 memset(arr + num, 0, 6);
1368 num += 6;
1369 arr[num++] = 0x0;
1370 arr[num++] = 12; /* length tp descriptor */
1371 /* naa-5 target port identifier (A) */
1372 arr[num++] = 0x61; /* proto=sas, binary */
1373 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1374 arr[num++] = 0x0; /* reserved */
1375 arr[num++] = 0x8; /* length */
1376 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1377 num += 8;
1378 arr[num++] = 0x0; /* reserved */
1379 arr[num++] = 0x0; /* reserved */
1380 arr[num++] = 0x0;
1381 arr[num++] = 0x2; /* relative port 2 (secondary) */
1382 memset(arr + num, 0, 6);
1383 num += 6;
1384 arr[num++] = 0x0;
1385 arr[num++] = 12; /* length tp descriptor */
1386 /* naa-5 target port identifier (B) */
1387 arr[num++] = 0x61; /* proto=sas, binary */
1388 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1389 arr[num++] = 0x0; /* reserved */
1390 arr[num++] = 0x8; /* length */
1391 put_unaligned_be64(naa3_comp_a + port_b, arr + num);
1392 num += 8;
1393
1394 return num;
1395}
1396
1397
1398static unsigned char vpd89_data[] = {
1399/* from 4th byte */ 0,0,0,0,
1400'l','i','n','u','x',' ',' ',' ',
1401'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
1402'1','2','3','4',
14030x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
14040xec,0,0,0,
14050x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
14060,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
14070x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
14080x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
14090x53,0x41,
14100x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
14110x20,0x20,
14120x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
14130x10,0x80,
14140,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
14150x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
14160x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
14170,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
14180x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
14190x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
14200,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
14210,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14220,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14230,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14240x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
14250,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
14260xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
14270,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
14280,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14290,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14300,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14310,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14320,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14330,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14340,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14350,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14360,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14370,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14380,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14390,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
1440};
1441
1442/* ATA Information VPD page */
1443static int inquiry_vpd_89(unsigned char *arr)
1444{
1445 memcpy(arr, vpd89_data, sizeof(vpd89_data));
1446 return sizeof(vpd89_data);
1447}
1448
1449
1450static unsigned char vpdb0_data[] = {
1451 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
1452 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1453 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1454 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1455};
1456
1457/* Block limits VPD page (SBC-3) */
1458static int inquiry_vpd_b0(unsigned char *arr)
1459{
1460 unsigned int gran;
1461
1462 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
1463
1464 /* Optimal transfer length granularity */
1465 if (sdebug_opt_xferlen_exp != 0 &&
1466 sdebug_physblk_exp < sdebug_opt_xferlen_exp)
1467 gran = 1 << sdebug_opt_xferlen_exp;
1468 else
1469 gran = 1 << sdebug_physblk_exp;
1470 put_unaligned_be16(gran, arr + 2);
1471
1472 /* Maximum Transfer Length */
1473 if (sdebug_store_sectors > 0x400)
1474 put_unaligned_be32(sdebug_store_sectors, arr + 4);
1475
1476 /* Optimal Transfer Length */
1477 put_unaligned_be32(sdebug_opt_blks, &arr[8]);
1478
1479 if (sdebug_lbpu) {
1480 /* Maximum Unmap LBA Count */
1481 put_unaligned_be32(sdebug_unmap_max_blocks, &arr[16]);
1482
1483 /* Maximum Unmap Block Descriptor Count */
1484 put_unaligned_be32(sdebug_unmap_max_desc, &arr[20]);
1485 }
1486
1487 /* Unmap Granularity Alignment */
1488 if (sdebug_unmap_alignment) {
1489 put_unaligned_be32(sdebug_unmap_alignment, &arr[28]);
1490 arr[28] |= 0x80; /* UGAVALID */
1491 }
1492
1493 /* Optimal Unmap Granularity */
1494 put_unaligned_be32(sdebug_unmap_granularity, &arr[24]);
1495
1496 /* Maximum WRITE SAME Length */
1497 put_unaligned_be64(sdebug_write_same_length, &arr[32]);
1498
1499 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
1500
1501 return sizeof(vpdb0_data);
1502}
1503
1504/* Block device characteristics VPD page (SBC-3) */
1505static int inquiry_vpd_b1(struct sdebug_dev_info *devip, unsigned char *arr)
1506{
1507 memset(arr, 0, 0x3c);
1508 arr[0] = 0;
1509 arr[1] = 1; /* non rotating medium (e.g. solid state) */
1510 arr[2] = 0;
1511 arr[3] = 5; /* less than 1.8" */
1512 if (devip->zmodel == BLK_ZONED_HA)
1513 arr[4] = 1 << 4; /* zoned field = 01b */
1514
1515 return 0x3c;
1516}
1517
1518/* Logical block provisioning VPD page (SBC-4) */
1519static int inquiry_vpd_b2(unsigned char *arr)
1520{
1521 memset(arr, 0, 0x4);
1522 arr[0] = 0; /* threshold exponent */
1523 if (sdebug_lbpu)
1524 arr[1] = 1 << 7;
1525 if (sdebug_lbpws)
1526 arr[1] |= 1 << 6;
1527 if (sdebug_lbpws10)
1528 arr[1] |= 1 << 5;
1529 if (sdebug_lbprz && scsi_debug_lbp())
1530 arr[1] |= (sdebug_lbprz & 0x7) << 2; /* sbc4r07 and later */
1531 /* anc_sup=0; dp=0 (no provisioning group descriptor) */
1532 /* minimum_percentage=0; provisioning_type=0 (unknown) */
1533 /* threshold_percentage=0 */
1534 return 0x4;
1535}
1536
1537/* Zoned block device characteristics VPD page (ZBC mandatory) */
1538static int inquiry_vpd_b6(struct sdebug_dev_info *devip, unsigned char *arr)
1539{
1540 memset(arr, 0, 0x3c);
1541 arr[0] = 0x1; /* set URSWRZ (unrestricted read in seq. wr req zone) */
1542 /*
1543 * Set Optimal number of open sequential write preferred zones and
1544 * Optimal number of non-sequentially written sequential write
1545 * preferred zones fields to 'not reported' (0xffffffff). Leave other
1546 * fields set to zero, apart from Max. number of open swrz_s field.
1547 */
1548 put_unaligned_be32(0xffffffff, &arr[4]);
1549 put_unaligned_be32(0xffffffff, &arr[8]);
1550 if (sdeb_zbc_model == BLK_ZONED_HM && devip->max_open)
1551 put_unaligned_be32(devip->max_open, &arr[12]);
1552 else
1553 put_unaligned_be32(0xffffffff, &arr[12]);
1554 return 0x3c;
1555}
1556
1557#define SDEBUG_LONG_INQ_SZ 96
1558#define SDEBUG_MAX_INQ_ARR_SZ 584
1559
1560static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1561{
1562 unsigned char pq_pdt;
1563 unsigned char *arr;
1564 unsigned char *cmd = scp->cmnd;
1565 int alloc_len, n, ret;
1566 bool have_wlun, is_disk, is_zbc, is_disk_zbc;
1567
1568 alloc_len = get_unaligned_be16(cmd + 3);
1569 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
1570 if (! arr)
1571 return DID_REQUEUE << 16;
1572 is_disk = (sdebug_ptype == TYPE_DISK);
1573 is_zbc = (devip->zmodel != BLK_ZONED_NONE);
1574 is_disk_zbc = (is_disk || is_zbc);
1575 have_wlun = scsi_is_wlun(scp->device->lun);
1576 if (have_wlun)
1577 pq_pdt = TYPE_WLUN; /* present, wlun */
1578 else if (sdebug_no_lun_0 && (devip->lun == SDEBUG_LUN_0_VAL))
1579 pq_pdt = 0x7f; /* not present, PQ=3, PDT=0x1f */
1580 else
1581 pq_pdt = (sdebug_ptype & 0x1f);
1582 arr[0] = pq_pdt;
1583 if (0x2 & cmd[1]) { /* CMDDT bit set */
1584 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
1585 kfree(arr);
1586 return check_condition_result;
1587 } else if (0x1 & cmd[1]) { /* EVPD bit set */
1588 int lu_id_num, port_group_id, target_dev_id, len;
1589 char lu_id_str[6];
1590 int host_no = devip->sdbg_host->shost->host_no;
1591
1592 port_group_id = (((host_no + 1) & 0x7f) << 8) +
1593 (devip->channel & 0x7f);
1594 if (sdebug_vpd_use_hostno == 0)
1595 host_no = 0;
1596 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) +
1597 (devip->target * 1000) + devip->lun);
1598 target_dev_id = ((host_no + 1) * 2000) +
1599 (devip->target * 1000) - 3;
1600 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
1601 if (0 == cmd[2]) { /* supported vital product data pages */
1602 arr[1] = cmd[2]; /*sanity */
1603 n = 4;
1604 arr[n++] = 0x0; /* this page */
1605 arr[n++] = 0x80; /* unit serial number */
1606 arr[n++] = 0x83; /* device identification */
1607 arr[n++] = 0x84; /* software interface ident. */
1608 arr[n++] = 0x85; /* management network addresses */
1609 arr[n++] = 0x86; /* extended inquiry */
1610 arr[n++] = 0x87; /* mode page policy */
1611 arr[n++] = 0x88; /* SCSI ports */
1612 if (is_disk_zbc) { /* SBC or ZBC */
1613 arr[n++] = 0x89; /* ATA information */
1614 arr[n++] = 0xb0; /* Block limits */
1615 arr[n++] = 0xb1; /* Block characteristics */
1616 if (is_disk)
1617 arr[n++] = 0xb2; /* LB Provisioning */
1618 if (is_zbc)
1619 arr[n++] = 0xb6; /* ZB dev. char. */
1620 }
1621 arr[3] = n - 4; /* number of supported VPD pages */
1622 } else if (0x80 == cmd[2]) { /* unit serial number */
1623 arr[1] = cmd[2]; /*sanity */
1624 arr[3] = len;
1625 memcpy(&arr[4], lu_id_str, len);
1626 } else if (0x83 == cmd[2]) { /* device identification */
1627 arr[1] = cmd[2]; /*sanity */
1628 arr[3] = inquiry_vpd_83(&arr[4], port_group_id,
1629 target_dev_id, lu_id_num,
1630 lu_id_str, len,
1631 &devip->lu_name);
1632 } else if (0x84 == cmd[2]) { /* Software interface ident. */
1633 arr[1] = cmd[2]; /*sanity */
1634 arr[3] = inquiry_vpd_84(&arr[4]);
1635 } else if (0x85 == cmd[2]) { /* Management network addresses */
1636 arr[1] = cmd[2]; /*sanity */
1637 arr[3] = inquiry_vpd_85(&arr[4]);
1638 } else if (0x86 == cmd[2]) { /* extended inquiry */
1639 arr[1] = cmd[2]; /*sanity */
1640 arr[3] = 0x3c; /* number of following entries */
1641 if (sdebug_dif == T10_PI_TYPE3_PROTECTION)
1642 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
1643 else if (have_dif_prot)
1644 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
1645 else
1646 arr[4] = 0x0; /* no protection stuff */
1647 arr[5] = 0x7; /* head of q, ordered + simple q's */
1648 } else if (0x87 == cmd[2]) { /* mode page policy */
1649 arr[1] = cmd[2]; /*sanity */
1650 arr[3] = 0x8; /* number of following entries */
1651 arr[4] = 0x2; /* disconnect-reconnect mp */
1652 arr[6] = 0x80; /* mlus, shared */
1653 arr[8] = 0x18; /* protocol specific lu */
1654 arr[10] = 0x82; /* mlus, per initiator port */
1655 } else if (0x88 == cmd[2]) { /* SCSI Ports */
1656 arr[1] = cmd[2]; /*sanity */
1657 arr[3] = inquiry_vpd_88(&arr[4], target_dev_id);
1658 } else if (is_disk_zbc && 0x89 == cmd[2]) { /* ATA info */
1659 arr[1] = cmd[2]; /*sanity */
1660 n = inquiry_vpd_89(&arr[4]);
1661 put_unaligned_be16(n, arr + 2);
1662 } else if (is_disk_zbc && 0xb0 == cmd[2]) { /* Block limits */
1663 arr[1] = cmd[2]; /*sanity */
1664 arr[3] = inquiry_vpd_b0(&arr[4]);
1665 } else if (is_disk_zbc && 0xb1 == cmd[2]) { /* Block char. */
1666 arr[1] = cmd[2]; /*sanity */
1667 arr[3] = inquiry_vpd_b1(devip, &arr[4]);
1668 } else if (is_disk && 0xb2 == cmd[2]) { /* LB Prov. */
1669 arr[1] = cmd[2]; /*sanity */
1670 arr[3] = inquiry_vpd_b2(&arr[4]);
1671 } else if (is_zbc && cmd[2] == 0xb6) { /* ZB dev. charact. */
1672 arr[1] = cmd[2]; /*sanity */
1673 arr[3] = inquiry_vpd_b6(devip, &arr[4]);
1674 } else {
1675 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
1676 kfree(arr);
1677 return check_condition_result;
1678 }
1679 len = min(get_unaligned_be16(arr + 2) + 4, alloc_len);
1680 ret = fill_from_dev_buffer(scp, arr,
1681 min(len, SDEBUG_MAX_INQ_ARR_SZ));
1682 kfree(arr);
1683 return ret;
1684 }
1685 /* drops through here for a standard inquiry */
1686 arr[1] = sdebug_removable ? 0x80 : 0; /* Removable disk */
1687 arr[2] = sdebug_scsi_level;
1688 arr[3] = 2; /* response_data_format==2 */
1689 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
1690 arr[5] = (int)have_dif_prot; /* PROTECT bit */
1691 if (sdebug_vpd_use_hostno == 0)
1692 arr[5] |= 0x10; /* claim: implicit TPGS */
1693 arr[6] = 0x10; /* claim: MultiP */
1694 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
1695 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
1696 memcpy(&arr[8], sdebug_inq_vendor_id, 8);
1697 memcpy(&arr[16], sdebug_inq_product_id, 16);
1698 memcpy(&arr[32], sdebug_inq_product_rev, 4);
1699 /* Use Vendor Specific area to place driver date in ASCII hex */
1700 memcpy(&arr[36], sdebug_version_date, 8);
1701 /* version descriptors (2 bytes each) follow */
1702 put_unaligned_be16(0xc0, arr + 58); /* SAM-6 no version claimed */
1703 put_unaligned_be16(0x5c0, arr + 60); /* SPC-5 no version claimed */
1704 n = 62;
1705 if (is_disk) { /* SBC-4 no version claimed */
1706 put_unaligned_be16(0x600, arr + n);
1707 n += 2;
1708 } else if (sdebug_ptype == TYPE_TAPE) { /* SSC-4 rev 3 */
1709 put_unaligned_be16(0x525, arr + n);
1710 n += 2;
1711 } else if (is_zbc) { /* ZBC BSR INCITS 536 revision 05 */
1712 put_unaligned_be16(0x624, arr + n);
1713 n += 2;
1714 }
1715 put_unaligned_be16(0x2100, arr + n); /* SPL-4 no version claimed */
1716 ret = fill_from_dev_buffer(scp, arr,
1717 min_t(int, alloc_len, SDEBUG_LONG_INQ_SZ));
1718 kfree(arr);
1719 return ret;
1720}
1721
1722/* See resp_iec_m_pg() for how this data is manipulated */
1723static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1724 0, 0, 0x0, 0x0};
1725
1726static int resp_requests(struct scsi_cmnd *scp,
1727 struct sdebug_dev_info *devip)
1728{
1729 unsigned char *cmd = scp->cmnd;
1730 unsigned char arr[SCSI_SENSE_BUFFERSIZE]; /* assume >= 18 bytes */
1731 bool dsense = !!(cmd[1] & 1);
1732 int alloc_len = cmd[4];
1733 int len = 18;
1734 int stopped_state = atomic_read(&devip->stopped);
1735
1736 memset(arr, 0, sizeof(arr));
1737 if (stopped_state > 0) { /* some "pollable" data [spc6r02: 5.12.2] */
1738 if (dsense) {
1739 arr[0] = 0x72;
1740 arr[1] = NOT_READY;
1741 arr[2] = LOGICAL_UNIT_NOT_READY;
1742 arr[3] = (stopped_state == 2) ? 0x1 : 0x2;
1743 len = 8;
1744 } else {
1745 arr[0] = 0x70;
1746 arr[2] = NOT_READY; /* NO_SENSE in sense_key */
1747 arr[7] = 0xa; /* 18 byte sense buffer */
1748 arr[12] = LOGICAL_UNIT_NOT_READY;
1749 arr[13] = (stopped_state == 2) ? 0x1 : 0x2;
1750 }
1751 } else if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
1752 /* Information exceptions control mode page: TEST=1, MRIE=6 */
1753 if (dsense) {
1754 arr[0] = 0x72;
1755 arr[1] = 0x0; /* NO_SENSE in sense_key */
1756 arr[2] = THRESHOLD_EXCEEDED;
1757 arr[3] = 0xff; /* Failure prediction(false) */
1758 len = 8;
1759 } else {
1760 arr[0] = 0x70;
1761 arr[2] = 0x0; /* NO_SENSE in sense_key */
1762 arr[7] = 0xa; /* 18 byte sense buffer */
1763 arr[12] = THRESHOLD_EXCEEDED;
1764 arr[13] = 0xff; /* Failure prediction(false) */
1765 }
1766 } else { /* nothing to report */
1767 if (dsense) {
1768 len = 8;
1769 memset(arr, 0, len);
1770 arr[0] = 0x72;
1771 } else {
1772 memset(arr, 0, len);
1773 arr[0] = 0x70;
1774 arr[7] = 0xa;
1775 }
1776 }
1777 return fill_from_dev_buffer(scp, arr, min_t(int, len, alloc_len));
1778}
1779
1780static int resp_start_stop(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1781{
1782 unsigned char *cmd = scp->cmnd;
1783 int power_cond, want_stop, stopped_state;
1784 bool changing;
1785
1786 power_cond = (cmd[4] & 0xf0) >> 4;
1787 if (power_cond) {
1788 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
1789 return check_condition_result;
1790 }
1791 want_stop = !(cmd[4] & 1);
1792 stopped_state = atomic_read(&devip->stopped);
1793 if (stopped_state == 2) {
1794 ktime_t now_ts = ktime_get_boottime();
1795
1796 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) {
1797 u64 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts));
1798
1799 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) {
1800 /* tur_ms_to_ready timer extinguished */
1801 atomic_set(&devip->stopped, 0);
1802 stopped_state = 0;
1803 }
1804 }
1805 if (stopped_state == 2) {
1806 if (want_stop) {
1807 stopped_state = 1; /* dummy up success */
1808 } else { /* Disallow tur_ms_to_ready delay to be overridden */
1809 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 0 /* START bit */);
1810 return check_condition_result;
1811 }
1812 }
1813 }
1814 changing = (stopped_state != want_stop);
1815 if (changing)
1816 atomic_xchg(&devip->stopped, want_stop);
1817 if (!changing || (cmd[1] & 0x1)) /* state unchanged or IMMED bit set in cdb */
1818 return SDEG_RES_IMMED_MASK;
1819 else
1820 return 0;
1821}
1822
1823static sector_t get_sdebug_capacity(void)
1824{
1825 static const unsigned int gibibyte = 1073741824;
1826
1827 if (sdebug_virtual_gb > 0)
1828 return (sector_t)sdebug_virtual_gb *
1829 (gibibyte / sdebug_sector_size);
1830 else
1831 return sdebug_store_sectors;
1832}
1833
1834#define SDEBUG_READCAP_ARR_SZ 8
1835static int resp_readcap(struct scsi_cmnd *scp,
1836 struct sdebug_dev_info *devip)
1837{
1838 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
1839 unsigned int capac;
1840
1841 /* following just in case virtual_gb changed */
1842 sdebug_capacity = get_sdebug_capacity();
1843 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
1844 if (sdebug_capacity < 0xffffffff) {
1845 capac = (unsigned int)sdebug_capacity - 1;
1846 put_unaligned_be32(capac, arr + 0);
1847 } else
1848 put_unaligned_be32(0xffffffff, arr + 0);
1849 put_unaligned_be16(sdebug_sector_size, arr + 6);
1850 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1851}
1852
1853#define SDEBUG_READCAP16_ARR_SZ 32
1854static int resp_readcap16(struct scsi_cmnd *scp,
1855 struct sdebug_dev_info *devip)
1856{
1857 unsigned char *cmd = scp->cmnd;
1858 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
1859 int alloc_len;
1860
1861 alloc_len = get_unaligned_be32(cmd + 10);
1862 /* following just in case virtual_gb changed */
1863 sdebug_capacity = get_sdebug_capacity();
1864 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
1865 put_unaligned_be64((u64)(sdebug_capacity - 1), arr + 0);
1866 put_unaligned_be32(sdebug_sector_size, arr + 8);
1867 arr[13] = sdebug_physblk_exp & 0xf;
1868 arr[14] = (sdebug_lowest_aligned >> 8) & 0x3f;
1869
1870 if (scsi_debug_lbp()) {
1871 arr[14] |= 0x80; /* LBPME */
1872 /* from sbc4r07, this LBPRZ field is 1 bit, but the LBPRZ in
1873 * the LB Provisioning VPD page is 3 bits. Note that lbprz=2
1874 * in the wider field maps to 0 in this field.
1875 */
1876 if (sdebug_lbprz & 1) /* precisely what the draft requires */
1877 arr[14] |= 0x40;
1878 }
1879
1880 arr[15] = sdebug_lowest_aligned & 0xff;
1881
1882 if (have_dif_prot) {
1883 arr[12] = (sdebug_dif - 1) << 1; /* P_TYPE */
1884 arr[12] |= 1; /* PROT_EN */
1885 }
1886
1887 return fill_from_dev_buffer(scp, arr,
1888 min_t(int, alloc_len, SDEBUG_READCAP16_ARR_SZ));
1889}
1890
1891#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1892
1893static int resp_report_tgtpgs(struct scsi_cmnd *scp,
1894 struct sdebug_dev_info *devip)
1895{
1896 unsigned char *cmd = scp->cmnd;
1897 unsigned char *arr;
1898 int host_no = devip->sdbg_host->shost->host_no;
1899 int n, ret, alen, rlen;
1900 int port_group_a, port_group_b, port_a, port_b;
1901
1902 alen = get_unaligned_be32(cmd + 6);
1903 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1904 if (! arr)
1905 return DID_REQUEUE << 16;
1906 /*
1907 * EVPD page 0x88 states we have two ports, one
1908 * real and a fake port with no device connected.
1909 * So we create two port groups with one port each
1910 * and set the group with port B to unavailable.
1911 */
1912 port_a = 0x1; /* relative port A */
1913 port_b = 0x2; /* relative port B */
1914 port_group_a = (((host_no + 1) & 0x7f) << 8) +
1915 (devip->channel & 0x7f);
1916 port_group_b = (((host_no + 1) & 0x7f) << 8) +
1917 (devip->channel & 0x7f) + 0x80;
1918
1919 /*
1920 * The asymmetric access state is cycled according to the host_id.
1921 */
1922 n = 4;
1923 if (sdebug_vpd_use_hostno == 0) {
1924 arr[n++] = host_no % 3; /* Asymm access state */
1925 arr[n++] = 0x0F; /* claim: all states are supported */
1926 } else {
1927 arr[n++] = 0x0; /* Active/Optimized path */
1928 arr[n++] = 0x01; /* only support active/optimized paths */
1929 }
1930 put_unaligned_be16(port_group_a, arr + n);
1931 n += 2;
1932 arr[n++] = 0; /* Reserved */
1933 arr[n++] = 0; /* Status code */
1934 arr[n++] = 0; /* Vendor unique */
1935 arr[n++] = 0x1; /* One port per group */
1936 arr[n++] = 0; /* Reserved */
1937 arr[n++] = 0; /* Reserved */
1938 put_unaligned_be16(port_a, arr + n);
1939 n += 2;
1940 arr[n++] = 3; /* Port unavailable */
1941 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
1942 put_unaligned_be16(port_group_b, arr + n);
1943 n += 2;
1944 arr[n++] = 0; /* Reserved */
1945 arr[n++] = 0; /* Status code */
1946 arr[n++] = 0; /* Vendor unique */
1947 arr[n++] = 0x1; /* One port per group */
1948 arr[n++] = 0; /* Reserved */
1949 arr[n++] = 0; /* Reserved */
1950 put_unaligned_be16(port_b, arr + n);
1951 n += 2;
1952
1953 rlen = n - 4;
1954 put_unaligned_be32(rlen, arr + 0);
1955
1956 /*
1957 * Return the smallest value of either
1958 * - The allocated length
1959 * - The constructed command length
1960 * - The maximum array size
1961 */
1962 rlen = min_t(int, alen, n);
1963 ret = fill_from_dev_buffer(scp, arr,
1964 min_t(int, rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1965 kfree(arr);
1966 return ret;
1967}
1968
1969static int resp_rsup_opcodes(struct scsi_cmnd *scp,
1970 struct sdebug_dev_info *devip)
1971{
1972 bool rctd;
1973 u8 reporting_opts, req_opcode, sdeb_i, supp;
1974 u16 req_sa, u;
1975 u32 alloc_len, a_len;
1976 int k, offset, len, errsts, count, bump, na;
1977 const struct opcode_info_t *oip;
1978 const struct opcode_info_t *r_oip;
1979 u8 *arr;
1980 u8 *cmd = scp->cmnd;
1981
1982 rctd = !!(cmd[2] & 0x80);
1983 reporting_opts = cmd[2] & 0x7;
1984 req_opcode = cmd[3];
1985 req_sa = get_unaligned_be16(cmd + 4);
1986 alloc_len = get_unaligned_be32(cmd + 6);
1987 if (alloc_len < 4 || alloc_len > 0xffff) {
1988 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1989 return check_condition_result;
1990 }
1991 if (alloc_len > 8192)
1992 a_len = 8192;
1993 else
1994 a_len = alloc_len;
1995 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC);
1996 if (NULL == arr) {
1997 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
1998 INSUFF_RES_ASCQ);
1999 return check_condition_result;
2000 }
2001 switch (reporting_opts) {
2002 case 0: /* all commands */
2003 /* count number of commands */
2004 for (count = 0, oip = opcode_info_arr;
2005 oip->num_attached != 0xff; ++oip) {
2006 if (F_INV_OP & oip->flags)
2007 continue;
2008 count += (oip->num_attached + 1);
2009 }
2010 bump = rctd ? 20 : 8;
2011 put_unaligned_be32(count * bump, arr);
2012 for (offset = 4, oip = opcode_info_arr;
2013 oip->num_attached != 0xff && offset < a_len; ++oip) {
2014 if (F_INV_OP & oip->flags)
2015 continue;
2016 na = oip->num_attached;
2017 arr[offset] = oip->opcode;
2018 put_unaligned_be16(oip->sa, arr + offset + 2);
2019 if (rctd)
2020 arr[offset + 5] |= 0x2;
2021 if (FF_SA & oip->flags)
2022 arr[offset + 5] |= 0x1;
2023 put_unaligned_be16(oip->len_mask[0], arr + offset + 6);
2024 if (rctd)
2025 put_unaligned_be16(0xa, arr + offset + 8);
2026 r_oip = oip;
2027 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) {
2028 if (F_INV_OP & oip->flags)
2029 continue;
2030 offset += bump;
2031 arr[offset] = oip->opcode;
2032 put_unaligned_be16(oip->sa, arr + offset + 2);
2033 if (rctd)
2034 arr[offset + 5] |= 0x2;
2035 if (FF_SA & oip->flags)
2036 arr[offset + 5] |= 0x1;
2037 put_unaligned_be16(oip->len_mask[0],
2038 arr + offset + 6);
2039 if (rctd)
2040 put_unaligned_be16(0xa,
2041 arr + offset + 8);
2042 }
2043 oip = r_oip;
2044 offset += bump;
2045 }
2046 break;
2047 case 1: /* one command: opcode only */
2048 case 2: /* one command: opcode plus service action */
2049 case 3: /* one command: if sa==0 then opcode only else opcode+sa */
2050 sdeb_i = opcode_ind_arr[req_opcode];
2051 oip = &opcode_info_arr[sdeb_i];
2052 if (F_INV_OP & oip->flags) {
2053 supp = 1;
2054 offset = 4;
2055 } else {
2056 if (1 == reporting_opts) {
2057 if (FF_SA & oip->flags) {
2058 mk_sense_invalid_fld(scp, SDEB_IN_CDB,
2059 2, 2);
2060 kfree(arr);
2061 return check_condition_result;
2062 }
2063 req_sa = 0;
2064 } else if (2 == reporting_opts &&
2065 0 == (FF_SA & oip->flags)) {
2066 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
2067 kfree(arr); /* point at requested sa */
2068 return check_condition_result;
2069 }
2070 if (0 == (FF_SA & oip->flags) &&
2071 req_opcode == oip->opcode)
2072 supp = 3;
2073 else if (0 == (FF_SA & oip->flags)) {
2074 na = oip->num_attached;
2075 for (k = 0, oip = oip->arrp; k < na;
2076 ++k, ++oip) {
2077 if (req_opcode == oip->opcode)
2078 break;
2079 }
2080 supp = (k >= na) ? 1 : 3;
2081 } else if (req_sa != oip->sa) {
2082 na = oip->num_attached;
2083 for (k = 0, oip = oip->arrp; k < na;
2084 ++k, ++oip) {
2085 if (req_sa == oip->sa)
2086 break;
2087 }
2088 supp = (k >= na) ? 1 : 3;
2089 } else
2090 supp = 3;
2091 if (3 == supp) {
2092 u = oip->len_mask[0];
2093 put_unaligned_be16(u, arr + 2);
2094 arr[4] = oip->opcode;
2095 for (k = 1; k < u; ++k)
2096 arr[4 + k] = (k < 16) ?
2097 oip->len_mask[k] : 0xff;
2098 offset = 4 + u;
2099 } else
2100 offset = 4;
2101 }
2102 arr[1] = (rctd ? 0x80 : 0) | supp;
2103 if (rctd) {
2104 put_unaligned_be16(0xa, arr + offset);
2105 offset += 12;
2106 }
2107 break;
2108 default:
2109 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
2110 kfree(arr);
2111 return check_condition_result;
2112 }
2113 offset = (offset < a_len) ? offset : a_len;
2114 len = (offset < alloc_len) ? offset : alloc_len;
2115 errsts = fill_from_dev_buffer(scp, arr, len);
2116 kfree(arr);
2117 return errsts;
2118}
2119
2120static int resp_rsup_tmfs(struct scsi_cmnd *scp,
2121 struct sdebug_dev_info *devip)
2122{
2123 bool repd;
2124 u32 alloc_len, len;
2125 u8 arr[16];
2126 u8 *cmd = scp->cmnd;
2127
2128 memset(arr, 0, sizeof(arr));
2129 repd = !!(cmd[2] & 0x80);
2130 alloc_len = get_unaligned_be32(cmd + 6);
2131 if (alloc_len < 4) {
2132 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
2133 return check_condition_result;
2134 }
2135 arr[0] = 0xc8; /* ATS | ATSS | LURS */
2136 arr[1] = 0x1; /* ITNRS */
2137 if (repd) {
2138 arr[3] = 0xc;
2139 len = 16;
2140 } else
2141 len = 4;
2142
2143 len = (len < alloc_len) ? len : alloc_len;
2144 return fill_from_dev_buffer(scp, arr, len);
2145}
2146
2147/* <<Following mode page info copied from ST318451LW>> */
2148
2149static int resp_err_recov_pg(unsigned char *p, int pcontrol, int target)
2150{ /* Read-Write Error Recovery page for mode_sense */
2151 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
2152 5, 0, 0xff, 0xff};
2153
2154 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
2155 if (1 == pcontrol)
2156 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
2157 return sizeof(err_recov_pg);
2158}
2159
2160static int resp_disconnect_pg(unsigned char *p, int pcontrol, int target)
2161{ /* Disconnect-Reconnect page for mode_sense */
2162 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
2163 0, 0, 0, 0, 0, 0, 0, 0};
2164
2165 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
2166 if (1 == pcontrol)
2167 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
2168 return sizeof(disconnect_pg);
2169}
2170
2171static int resp_format_pg(unsigned char *p, int pcontrol, int target)
2172{ /* Format device page for mode_sense */
2173 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
2174 0, 0, 0, 0, 0, 0, 0, 0,
2175 0, 0, 0, 0, 0x40, 0, 0, 0};
2176
2177 memcpy(p, format_pg, sizeof(format_pg));
2178 put_unaligned_be16(sdebug_sectors_per, p + 10);
2179 put_unaligned_be16(sdebug_sector_size, p + 12);
2180 if (sdebug_removable)
2181 p[20] |= 0x20; /* should agree with INQUIRY */
2182 if (1 == pcontrol)
2183 memset(p + 2, 0, sizeof(format_pg) - 2);
2184 return sizeof(format_pg);
2185}
2186
2187static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
2188 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
2189 0, 0, 0, 0};
2190
2191static int resp_caching_pg(unsigned char *p, int pcontrol, int target)
2192{ /* Caching page for mode_sense */
2193 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
2194 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
2195 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
2196 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
2197
2198 if (SDEBUG_OPT_N_WCE & sdebug_opts)
2199 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
2200 memcpy(p, caching_pg, sizeof(caching_pg));
2201 if (1 == pcontrol)
2202 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
2203 else if (2 == pcontrol)
2204 memcpy(p, d_caching_pg, sizeof(d_caching_pg));
2205 return sizeof(caching_pg);
2206}
2207
2208static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
2209 0, 0, 0x2, 0x4b};
2210
2211static int resp_ctrl_m_pg(unsigned char *p, int pcontrol, int target)
2212{ /* Control mode page for mode_sense */
2213 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
2214 0, 0, 0, 0};
2215 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
2216 0, 0, 0x2, 0x4b};
2217
2218 if (sdebug_dsense)
2219 ctrl_m_pg[2] |= 0x4;
2220 else
2221 ctrl_m_pg[2] &= ~0x4;
2222
2223 if (sdebug_ato)
2224 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
2225
2226 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
2227 if (1 == pcontrol)
2228 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
2229 else if (2 == pcontrol)
2230 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
2231 return sizeof(ctrl_m_pg);
2232}
2233
2234
2235static int resp_iec_m_pg(unsigned char *p, int pcontrol, int target)
2236{ /* Informational Exceptions control mode page for mode_sense */
2237 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
2238 0, 0, 0x0, 0x0};
2239 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
2240 0, 0, 0x0, 0x0};
2241
2242 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
2243 if (1 == pcontrol)
2244 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
2245 else if (2 == pcontrol)
2246 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
2247 return sizeof(iec_m_pg);
2248}
2249
2250static int resp_sas_sf_m_pg(unsigned char *p, int pcontrol, int target)
2251{ /* SAS SSP mode page - short format for mode_sense */
2252 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
2253 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
2254
2255 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
2256 if (1 == pcontrol)
2257 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
2258 return sizeof(sas_sf_m_pg);
2259}
2260
2261
2262static int resp_sas_pcd_m_spg(unsigned char *p, int pcontrol, int target,
2263 int target_dev_id)
2264{ /* SAS phy control and discover mode page for mode_sense */
2265 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
2266 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
2267 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2268 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2269 0x2, 0, 0, 0, 0, 0, 0, 0,
2270 0x88, 0x99, 0, 0, 0, 0, 0, 0,
2271 0, 0, 0, 0, 0, 0, 0, 0,
2272 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
2273 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2274 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2275 0x3, 0, 0, 0, 0, 0, 0, 0,
2276 0x88, 0x99, 0, 0, 0, 0, 0, 0,
2277 0, 0, 0, 0, 0, 0, 0, 0,
2278 };
2279 int port_a, port_b;
2280
2281 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 16);
2282 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 24);
2283 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 64);
2284 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 72);
2285 port_a = target_dev_id + 1;
2286 port_b = port_a + 1;
2287 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
2288 put_unaligned_be32(port_a, p + 20);
2289 put_unaligned_be32(port_b, p + 48 + 20);
2290 if (1 == pcontrol)
2291 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
2292 return sizeof(sas_pcd_m_pg);
2293}
2294
2295static int resp_sas_sha_m_spg(unsigned char *p, int pcontrol)
2296{ /* SAS SSP shared protocol specific port mode subpage */
2297 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
2298 0, 0, 0, 0, 0, 0, 0, 0,
2299 };
2300
2301 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
2302 if (1 == pcontrol)
2303 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
2304 return sizeof(sas_sha_m_pg);
2305}
2306
2307#define SDEBUG_MAX_MSENSE_SZ 256
2308
2309static int resp_mode_sense(struct scsi_cmnd *scp,
2310 struct sdebug_dev_info *devip)
2311{
2312 int pcontrol, pcode, subpcode, bd_len;
2313 unsigned char dev_spec;
2314 int alloc_len, offset, len, target_dev_id;
2315 int target = scp->device->id;
2316 unsigned char *ap;
2317 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
2318 unsigned char *cmd = scp->cmnd;
2319 bool dbd, llbaa, msense_6, is_disk, is_zbc, bad_pcode;
2320
2321 dbd = !!(cmd[1] & 0x8); /* disable block descriptors */
2322 pcontrol = (cmd[2] & 0xc0) >> 6;
2323 pcode = cmd[2] & 0x3f;
2324 subpcode = cmd[3];
2325 msense_6 = (MODE_SENSE == cmd[0]);
2326 llbaa = msense_6 ? false : !!(cmd[1] & 0x10);
2327 is_disk = (sdebug_ptype == TYPE_DISK);
2328 is_zbc = (devip->zmodel != BLK_ZONED_NONE);
2329 if ((is_disk || is_zbc) && !dbd)
2330 bd_len = llbaa ? 16 : 8;
2331 else
2332 bd_len = 0;
2333 alloc_len = msense_6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2334 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
2335 if (0x3 == pcontrol) { /* Saving values not supported */
2336 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
2337 return check_condition_result;
2338 }
2339 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
2340 (devip->target * 1000) - 3;
2341 /* for disks+zbc set DPOFUA bit and clear write protect (WP) bit */
2342 if (is_disk || is_zbc) {
2343 dev_spec = 0x10; /* =0x90 if WP=1 implies read-only */
2344 if (sdebug_wp)
2345 dev_spec |= 0x80;
2346 } else
2347 dev_spec = 0x0;
2348 if (msense_6) {
2349 arr[2] = dev_spec;
2350 arr[3] = bd_len;
2351 offset = 4;
2352 } else {
2353 arr[3] = dev_spec;
2354 if (16 == bd_len)
2355 arr[4] = 0x1; /* set LONGLBA bit */
2356 arr[7] = bd_len; /* assume 255 or less */
2357 offset = 8;
2358 }
2359 ap = arr + offset;
2360 if ((bd_len > 0) && (!sdebug_capacity))
2361 sdebug_capacity = get_sdebug_capacity();
2362
2363 if (8 == bd_len) {
2364 if (sdebug_capacity > 0xfffffffe)
2365 put_unaligned_be32(0xffffffff, ap + 0);
2366 else
2367 put_unaligned_be32(sdebug_capacity, ap + 0);
2368 put_unaligned_be16(sdebug_sector_size, ap + 6);
2369 offset += bd_len;
2370 ap = arr + offset;
2371 } else if (16 == bd_len) {
2372 put_unaligned_be64((u64)sdebug_capacity, ap + 0);
2373 put_unaligned_be32(sdebug_sector_size, ap + 12);
2374 offset += bd_len;
2375 ap = arr + offset;
2376 }
2377
2378 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
2379 /* TODO: Control Extension page */
2380 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2381 return check_condition_result;
2382 }
2383 bad_pcode = false;
2384
2385 switch (pcode) {
2386 case 0x1: /* Read-Write error recovery page, direct access */
2387 len = resp_err_recov_pg(ap, pcontrol, target);
2388 offset += len;
2389 break;
2390 case 0x2: /* Disconnect-Reconnect page, all devices */
2391 len = resp_disconnect_pg(ap, pcontrol, target);
2392 offset += len;
2393 break;
2394 case 0x3: /* Format device page, direct access */
2395 if (is_disk) {
2396 len = resp_format_pg(ap, pcontrol, target);
2397 offset += len;
2398 } else
2399 bad_pcode = true;
2400 break;
2401 case 0x8: /* Caching page, direct access */
2402 if (is_disk || is_zbc) {
2403 len = resp_caching_pg(ap, pcontrol, target);
2404 offset += len;
2405 } else
2406 bad_pcode = true;
2407 break;
2408 case 0xa: /* Control Mode page, all devices */
2409 len = resp_ctrl_m_pg(ap, pcontrol, target);
2410 offset += len;
2411 break;
2412 case 0x19: /* if spc==1 then sas phy, control+discover */
2413 if ((subpcode > 0x2) && (subpcode < 0xff)) {
2414 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2415 return check_condition_result;
2416 }
2417 len = 0;
2418 if ((0x0 == subpcode) || (0xff == subpcode))
2419 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2420 if ((0x1 == subpcode) || (0xff == subpcode))
2421 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
2422 target_dev_id);
2423 if ((0x2 == subpcode) || (0xff == subpcode))
2424 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2425 offset += len;
2426 break;
2427 case 0x1c: /* Informational Exceptions Mode page, all devices */
2428 len = resp_iec_m_pg(ap, pcontrol, target);
2429 offset += len;
2430 break;
2431 case 0x3f: /* Read all Mode pages */
2432 if ((0 == subpcode) || (0xff == subpcode)) {
2433 len = resp_err_recov_pg(ap, pcontrol, target);
2434 len += resp_disconnect_pg(ap + len, pcontrol, target);
2435 if (is_disk) {
2436 len += resp_format_pg(ap + len, pcontrol,
2437 target);
2438 len += resp_caching_pg(ap + len, pcontrol,
2439 target);
2440 } else if (is_zbc) {
2441 len += resp_caching_pg(ap + len, pcontrol,
2442 target);
2443 }
2444 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
2445 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2446 if (0xff == subpcode) {
2447 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
2448 target, target_dev_id);
2449 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2450 }
2451 len += resp_iec_m_pg(ap + len, pcontrol, target);
2452 offset += len;
2453 } else {
2454 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2455 return check_condition_result;
2456 }
2457 break;
2458 default:
2459 bad_pcode = true;
2460 break;
2461 }
2462 if (bad_pcode) {
2463 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2464 return check_condition_result;
2465 }
2466 if (msense_6)
2467 arr[0] = offset - 1;
2468 else
2469 put_unaligned_be16((offset - 2), arr + 0);
2470 return fill_from_dev_buffer(scp, arr, min_t(int, alloc_len, offset));
2471}
2472
2473#define SDEBUG_MAX_MSELECT_SZ 512
2474
2475static int resp_mode_select(struct scsi_cmnd *scp,
2476 struct sdebug_dev_info *devip)
2477{
2478 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
2479 int param_len, res, mpage;
2480 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
2481 unsigned char *cmd = scp->cmnd;
2482 int mselect6 = (MODE_SELECT == cmd[0]);
2483
2484 memset(arr, 0, sizeof(arr));
2485 pf = cmd[1] & 0x10;
2486 sp = cmd[1] & 0x1;
2487 param_len = mselect6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2488 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
2489 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1);
2490 return check_condition_result;
2491 }
2492 res = fetch_to_dev_buffer(scp, arr, param_len);
2493 if (-1 == res)
2494 return DID_ERROR << 16;
2495 else if (sdebug_verbose && (res < param_len))
2496 sdev_printk(KERN_INFO, scp->device,
2497 "%s: cdb indicated=%d, IO sent=%d bytes\n",
2498 __func__, param_len, res);
2499 md_len = mselect6 ? (arr[0] + 1) : (get_unaligned_be16(arr + 0) + 2);
2500 bd_len = mselect6 ? arr[3] : get_unaligned_be16(arr + 6);
2501 if (md_len > 2) {
2502 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1);
2503 return check_condition_result;
2504 }
2505 off = bd_len + (mselect6 ? 4 : 8);
2506 mpage = arr[off] & 0x3f;
2507 ps = !!(arr[off] & 0x80);
2508 if (ps) {
2509 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7);
2510 return check_condition_result;
2511 }
2512 spf = !!(arr[off] & 0x40);
2513 pg_len = spf ? (get_unaligned_be16(arr + off + 2) + 4) :
2514 (arr[off + 1] + 2);
2515 if ((pg_len + off) > param_len) {
2516 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2517 PARAMETER_LIST_LENGTH_ERR, 0);
2518 return check_condition_result;
2519 }
2520 switch (mpage) {
2521 case 0x8: /* Caching Mode page */
2522 if (caching_pg[1] == arr[off + 1]) {
2523 memcpy(caching_pg + 2, arr + off + 2,
2524 sizeof(caching_pg) - 2);
2525 goto set_mode_changed_ua;
2526 }
2527 break;
2528 case 0xa: /* Control Mode page */
2529 if (ctrl_m_pg[1] == arr[off + 1]) {
2530 memcpy(ctrl_m_pg + 2, arr + off + 2,
2531 sizeof(ctrl_m_pg) - 2);
2532 if (ctrl_m_pg[4] & 0x8)
2533 sdebug_wp = true;
2534 else
2535 sdebug_wp = false;
2536 sdebug_dsense = !!(ctrl_m_pg[2] & 0x4);
2537 goto set_mode_changed_ua;
2538 }
2539 break;
2540 case 0x1c: /* Informational Exceptions Mode page */
2541 if (iec_m_pg[1] == arr[off + 1]) {
2542 memcpy(iec_m_pg + 2, arr + off + 2,
2543 sizeof(iec_m_pg) - 2);
2544 goto set_mode_changed_ua;
2545 }
2546 break;
2547 default:
2548 break;
2549 }
2550 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5);
2551 return check_condition_result;
2552set_mode_changed_ua:
2553 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
2554 return 0;
2555}
2556
2557static int resp_temp_l_pg(unsigned char *arr)
2558{
2559 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
2560 0x0, 0x1, 0x3, 0x2, 0x0, 65,
2561 };
2562
2563 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
2564 return sizeof(temp_l_pg);
2565}
2566
2567static int resp_ie_l_pg(unsigned char *arr)
2568{
2569 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
2570 };
2571
2572 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
2573 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
2574 arr[4] = THRESHOLD_EXCEEDED;
2575 arr[5] = 0xff;
2576 }
2577 return sizeof(ie_l_pg);
2578}
2579
2580#define SDEBUG_MAX_LSENSE_SZ 512
2581
2582static int resp_log_sense(struct scsi_cmnd *scp,
2583 struct sdebug_dev_info *devip)
2584{
2585 int ppc, sp, pcode, subpcode, alloc_len, len, n;
2586 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
2587 unsigned char *cmd = scp->cmnd;
2588
2589 memset(arr, 0, sizeof(arr));
2590 ppc = cmd[1] & 0x2;
2591 sp = cmd[1] & 0x1;
2592 if (ppc || sp) {
2593 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0);
2594 return check_condition_result;
2595 }
2596 pcode = cmd[2] & 0x3f;
2597 subpcode = cmd[3] & 0xff;
2598 alloc_len = get_unaligned_be16(cmd + 7);
2599 arr[0] = pcode;
2600 if (0 == subpcode) {
2601 switch (pcode) {
2602 case 0x0: /* Supported log pages log page */
2603 n = 4;
2604 arr[n++] = 0x0; /* this page */
2605 arr[n++] = 0xd; /* Temperature */
2606 arr[n++] = 0x2f; /* Informational exceptions */
2607 arr[3] = n - 4;
2608 break;
2609 case 0xd: /* Temperature log page */
2610 arr[3] = resp_temp_l_pg(arr + 4);
2611 break;
2612 case 0x2f: /* Informational exceptions log page */
2613 arr[3] = resp_ie_l_pg(arr + 4);
2614 break;
2615 default:
2616 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2617 return check_condition_result;
2618 }
2619 } else if (0xff == subpcode) {
2620 arr[0] |= 0x40;
2621 arr[1] = subpcode;
2622 switch (pcode) {
2623 case 0x0: /* Supported log pages and subpages log page */
2624 n = 4;
2625 arr[n++] = 0x0;
2626 arr[n++] = 0x0; /* 0,0 page */
2627 arr[n++] = 0x0;
2628 arr[n++] = 0xff; /* this page */
2629 arr[n++] = 0xd;
2630 arr[n++] = 0x0; /* Temperature */
2631 arr[n++] = 0x2f;
2632 arr[n++] = 0x0; /* Informational exceptions */
2633 arr[3] = n - 4;
2634 break;
2635 case 0xd: /* Temperature subpages */
2636 n = 4;
2637 arr[n++] = 0xd;
2638 arr[n++] = 0x0; /* Temperature */
2639 arr[3] = n - 4;
2640 break;
2641 case 0x2f: /* Informational exceptions subpages */
2642 n = 4;
2643 arr[n++] = 0x2f;
2644 arr[n++] = 0x0; /* Informational exceptions */
2645 arr[3] = n - 4;
2646 break;
2647 default:
2648 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2649 return check_condition_result;
2650 }
2651 } else {
2652 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2653 return check_condition_result;
2654 }
2655 len = min_t(int, get_unaligned_be16(arr + 2) + 4, alloc_len);
2656 return fill_from_dev_buffer(scp, arr,
2657 min_t(int, len, SDEBUG_MAX_INQ_ARR_SZ));
2658}
2659
2660static inline bool sdebug_dev_is_zoned(struct sdebug_dev_info *devip)
2661{
2662 return devip->nr_zones != 0;
2663}
2664
2665static struct sdeb_zone_state *zbc_zone(struct sdebug_dev_info *devip,
2666 unsigned long long lba)
2667{
2668 return &devip->zstate[lba >> devip->zsize_shift];
2669}
2670
2671static inline bool zbc_zone_is_conv(struct sdeb_zone_state *zsp)
2672{
2673 return zsp->z_type == ZBC_ZONE_TYPE_CNV;
2674}
2675
2676static void zbc_close_zone(struct sdebug_dev_info *devip,
2677 struct sdeb_zone_state *zsp)
2678{
2679 enum sdebug_z_cond zc;
2680
2681 if (zbc_zone_is_conv(zsp))
2682 return;
2683
2684 zc = zsp->z_cond;
2685 if (!(zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN))
2686 return;
2687
2688 if (zc == ZC2_IMPLICIT_OPEN)
2689 devip->nr_imp_open--;
2690 else
2691 devip->nr_exp_open--;
2692
2693 if (zsp->z_wp == zsp->z_start) {
2694 zsp->z_cond = ZC1_EMPTY;
2695 } else {
2696 zsp->z_cond = ZC4_CLOSED;
2697 devip->nr_closed++;
2698 }
2699}
2700
2701static void zbc_close_imp_open_zone(struct sdebug_dev_info *devip)
2702{
2703 struct sdeb_zone_state *zsp = &devip->zstate[0];
2704 unsigned int i;
2705
2706 for (i = 0; i < devip->nr_zones; i++, zsp++) {
2707 if (zsp->z_cond == ZC2_IMPLICIT_OPEN) {
2708 zbc_close_zone(devip, zsp);
2709 return;
2710 }
2711 }
2712}
2713
2714static void zbc_open_zone(struct sdebug_dev_info *devip,
2715 struct sdeb_zone_state *zsp, bool explicit)
2716{
2717 enum sdebug_z_cond zc;
2718
2719 if (zbc_zone_is_conv(zsp))
2720 return;
2721
2722 zc = zsp->z_cond;
2723 if ((explicit && zc == ZC3_EXPLICIT_OPEN) ||
2724 (!explicit && zc == ZC2_IMPLICIT_OPEN))
2725 return;
2726
2727 /* Close an implicit open zone if necessary */
2728 if (explicit && zsp->z_cond == ZC2_IMPLICIT_OPEN)
2729 zbc_close_zone(devip, zsp);
2730 else if (devip->max_open &&
2731 devip->nr_imp_open + devip->nr_exp_open >= devip->max_open)
2732 zbc_close_imp_open_zone(devip);
2733
2734 if (zsp->z_cond == ZC4_CLOSED)
2735 devip->nr_closed--;
2736 if (explicit) {
2737 zsp->z_cond = ZC3_EXPLICIT_OPEN;
2738 devip->nr_exp_open++;
2739 } else {
2740 zsp->z_cond = ZC2_IMPLICIT_OPEN;
2741 devip->nr_imp_open++;
2742 }
2743}
2744
2745static void zbc_inc_wp(struct sdebug_dev_info *devip,
2746 unsigned long long lba, unsigned int num)
2747{
2748 struct sdeb_zone_state *zsp = zbc_zone(devip, lba);
2749 unsigned long long n, end, zend = zsp->z_start + zsp->z_size;
2750
2751 if (zbc_zone_is_conv(zsp))
2752 return;
2753
2754 if (zsp->z_type == ZBC_ZONE_TYPE_SWR) {
2755 zsp->z_wp += num;
2756 if (zsp->z_wp >= zend)
2757 zsp->z_cond = ZC5_FULL;
2758 return;
2759 }
2760
2761 while (num) {
2762 if (lba != zsp->z_wp)
2763 zsp->z_non_seq_resource = true;
2764
2765 end = lba + num;
2766 if (end >= zend) {
2767 n = zend - lba;
2768 zsp->z_wp = zend;
2769 } else if (end > zsp->z_wp) {
2770 n = num;
2771 zsp->z_wp = end;
2772 } else {
2773 n = num;
2774 }
2775 if (zsp->z_wp >= zend)
2776 zsp->z_cond = ZC5_FULL;
2777
2778 num -= n;
2779 lba += n;
2780 if (num) {
2781 zsp++;
2782 zend = zsp->z_start + zsp->z_size;
2783 }
2784 }
2785}
2786
2787static int check_zbc_access_params(struct scsi_cmnd *scp,
2788 unsigned long long lba, unsigned int num, bool write)
2789{
2790 struct scsi_device *sdp = scp->device;
2791 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
2792 struct sdeb_zone_state *zsp = zbc_zone(devip, lba);
2793 struct sdeb_zone_state *zsp_end = zbc_zone(devip, lba + num - 1);
2794
2795 if (!write) {
2796 if (devip->zmodel == BLK_ZONED_HA)
2797 return 0;
2798 /* For host-managed, reads cannot cross zone types boundaries */
2799 if (zsp_end != zsp &&
2800 zbc_zone_is_conv(zsp) &&
2801 !zbc_zone_is_conv(zsp_end)) {
2802 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2803 LBA_OUT_OF_RANGE,
2804 READ_INVDATA_ASCQ);
2805 return check_condition_result;
2806 }
2807 return 0;
2808 }
2809
2810 /* No restrictions for writes within conventional zones */
2811 if (zbc_zone_is_conv(zsp)) {
2812 if (!zbc_zone_is_conv(zsp_end)) {
2813 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2814 LBA_OUT_OF_RANGE,
2815 WRITE_BOUNDARY_ASCQ);
2816 return check_condition_result;
2817 }
2818 return 0;
2819 }
2820
2821 if (zsp->z_type == ZBC_ZONE_TYPE_SWR) {
2822 /* Writes cannot cross sequential zone boundaries */
2823 if (zsp_end != zsp) {
2824 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2825 LBA_OUT_OF_RANGE,
2826 WRITE_BOUNDARY_ASCQ);
2827 return check_condition_result;
2828 }
2829 /* Cannot write full zones */
2830 if (zsp->z_cond == ZC5_FULL) {
2831 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2832 INVALID_FIELD_IN_CDB, 0);
2833 return check_condition_result;
2834 }
2835 /* Writes must be aligned to the zone WP */
2836 if (lba != zsp->z_wp) {
2837 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2838 LBA_OUT_OF_RANGE,
2839 UNALIGNED_WRITE_ASCQ);
2840 return check_condition_result;
2841 }
2842 }
2843
2844 /* Handle implicit open of closed and empty zones */
2845 if (zsp->z_cond == ZC1_EMPTY || zsp->z_cond == ZC4_CLOSED) {
2846 if (devip->max_open &&
2847 devip->nr_exp_open >= devip->max_open) {
2848 mk_sense_buffer(scp, DATA_PROTECT,
2849 INSUFF_RES_ASC,
2850 INSUFF_ZONE_ASCQ);
2851 return check_condition_result;
2852 }
2853 zbc_open_zone(devip, zsp, false);
2854 }
2855
2856 return 0;
2857}
2858
2859static inline int check_device_access_params
2860 (struct scsi_cmnd *scp, unsigned long long lba,
2861 unsigned int num, bool write)
2862{
2863 struct scsi_device *sdp = scp->device;
2864 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
2865
2866 if (lba + num > sdebug_capacity) {
2867 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2868 return check_condition_result;
2869 }
2870 /* transfer length excessive (tie in to block limits VPD page) */
2871 if (num > sdebug_store_sectors) {
2872 /* needs work to find which cdb byte 'num' comes from */
2873 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2874 return check_condition_result;
2875 }
2876 if (write && unlikely(sdebug_wp)) {
2877 mk_sense_buffer(scp, DATA_PROTECT, WRITE_PROTECTED, 0x2);
2878 return check_condition_result;
2879 }
2880 if (sdebug_dev_is_zoned(devip))
2881 return check_zbc_access_params(scp, lba, num, write);
2882
2883 return 0;
2884}
2885
2886/*
2887 * Note: if BUG_ON() fires it usually indicates a problem with the parser
2888 * tables. Perhaps a missing F_FAKE_RW or FF_MEDIA_IO flag. Response functions
2889 * that access any of the "stores" in struct sdeb_store_info should call this
2890 * function with bug_if_fake_rw set to true.
2891 */
2892static inline struct sdeb_store_info *devip2sip(struct sdebug_dev_info *devip,
2893 bool bug_if_fake_rw)
2894{
2895 if (sdebug_fake_rw) {
2896 BUG_ON(bug_if_fake_rw); /* See note above */
2897 return NULL;
2898 }
2899 return xa_load(per_store_ap, devip->sdbg_host->si_idx);
2900}
2901
2902/* Returns number of bytes copied or -1 if error. */
2903static int do_device_access(struct sdeb_store_info *sip, struct scsi_cmnd *scp,
2904 u32 sg_skip, u64 lba, u32 num, bool do_write)
2905{
2906 int ret;
2907 u64 block, rest = 0;
2908 enum dma_data_direction dir;
2909 struct scsi_data_buffer *sdb = &scp->sdb;
2910 u8 *fsp;
2911
2912 if (do_write) {
2913 dir = DMA_TO_DEVICE;
2914 write_since_sync = true;
2915 } else {
2916 dir = DMA_FROM_DEVICE;
2917 }
2918
2919 if (!sdb->length || !sip)
2920 return 0;
2921 if (scp->sc_data_direction != dir)
2922 return -1;
2923 fsp = sip->storep;
2924
2925 block = do_div(lba, sdebug_store_sectors);
2926 if (block + num > sdebug_store_sectors)
2927 rest = block + num - sdebug_store_sectors;
2928
2929 ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
2930 fsp + (block * sdebug_sector_size),
2931 (num - rest) * sdebug_sector_size, sg_skip, do_write);
2932 if (ret != (num - rest) * sdebug_sector_size)
2933 return ret;
2934
2935 if (rest) {
2936 ret += sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
2937 fsp, rest * sdebug_sector_size,
2938 sg_skip + ((num - rest) * sdebug_sector_size),
2939 do_write);
2940 }
2941
2942 return ret;
2943}
2944
2945/* Returns number of bytes copied or -1 if error. */
2946static int do_dout_fetch(struct scsi_cmnd *scp, u32 num, u8 *doutp)
2947{
2948 struct scsi_data_buffer *sdb = &scp->sdb;
2949
2950 if (!sdb->length)
2951 return 0;
2952 if (scp->sc_data_direction != DMA_TO_DEVICE)
2953 return -1;
2954 return sg_copy_buffer(sdb->table.sgl, sdb->table.nents, doutp,
2955 num * sdebug_sector_size, 0, true);
2956}
2957
2958/* If sip->storep+lba compares equal to arr(num), then copy top half of
2959 * arr into sip->storep+lba and return true. If comparison fails then
2960 * return false. */
2961static bool comp_write_worker(struct sdeb_store_info *sip, u64 lba, u32 num,
2962 const u8 *arr, bool compare_only)
2963{
2964 bool res;
2965 u64 block, rest = 0;
2966 u32 store_blks = sdebug_store_sectors;
2967 u32 lb_size = sdebug_sector_size;
2968 u8 *fsp = sip->storep;
2969
2970 block = do_div(lba, store_blks);
2971 if (block + num > store_blks)
2972 rest = block + num - store_blks;
2973
2974 res = !memcmp(fsp + (block * lb_size), arr, (num - rest) * lb_size);
2975 if (!res)
2976 return res;
2977 if (rest)
2978 res = memcmp(fsp, arr + ((num - rest) * lb_size),
2979 rest * lb_size);
2980 if (!res)
2981 return res;
2982 if (compare_only)
2983 return true;
2984 arr += num * lb_size;
2985 memcpy(fsp + (block * lb_size), arr, (num - rest) * lb_size);
2986 if (rest)
2987 memcpy(fsp, arr + ((num - rest) * lb_size), rest * lb_size);
2988 return res;
2989}
2990
2991static __be16 dif_compute_csum(const void *buf, int len)
2992{
2993 __be16 csum;
2994
2995 if (sdebug_guard)
2996 csum = (__force __be16)ip_compute_csum(buf, len);
2997 else
2998 csum = cpu_to_be16(crc_t10dif(buf, len));
2999
3000 return csum;
3001}
3002
3003static int dif_verify(struct t10_pi_tuple *sdt, const void *data,
3004 sector_t sector, u32 ei_lba)
3005{
3006 __be16 csum = dif_compute_csum(data, sdebug_sector_size);
3007
3008 if (sdt->guard_tag != csum) {
3009 pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
3010 (unsigned long)sector,
3011 be16_to_cpu(sdt->guard_tag),
3012 be16_to_cpu(csum));
3013 return 0x01;
3014 }
3015 if (sdebug_dif == T10_PI_TYPE1_PROTECTION &&
3016 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
3017 pr_err("REF check failed on sector %lu\n",
3018 (unsigned long)sector);
3019 return 0x03;
3020 }
3021 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3022 be32_to_cpu(sdt->ref_tag) != ei_lba) {
3023 pr_err("REF check failed on sector %lu\n",
3024 (unsigned long)sector);
3025 return 0x03;
3026 }
3027 return 0;
3028}
3029
3030static void dif_copy_prot(struct scsi_cmnd *scp, sector_t sector,
3031 unsigned int sectors, bool read)
3032{
3033 size_t resid;
3034 void *paddr;
3035 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
3036 scp->device->hostdata, true);
3037 struct t10_pi_tuple *dif_storep = sip->dif_storep;
3038 const void *dif_store_end = dif_storep + sdebug_store_sectors;
3039 struct sg_mapping_iter miter;
3040
3041 /* Bytes of protection data to copy into sgl */
3042 resid = sectors * sizeof(*dif_storep);
3043
3044 sg_miter_start(&miter, scsi_prot_sglist(scp),
3045 scsi_prot_sg_count(scp), SG_MITER_ATOMIC |
3046 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
3047
3048 while (sg_miter_next(&miter) && resid > 0) {
3049 size_t len = min_t(size_t, miter.length, resid);
3050 void *start = dif_store(sip, sector);
3051 size_t rest = 0;
3052
3053 if (dif_store_end < start + len)
3054 rest = start + len - dif_store_end;
3055
3056 paddr = miter.addr;
3057
3058 if (read)
3059 memcpy(paddr, start, len - rest);
3060 else
3061 memcpy(start, paddr, len - rest);
3062
3063 if (rest) {
3064 if (read)
3065 memcpy(paddr + len - rest, dif_storep, rest);
3066 else
3067 memcpy(dif_storep, paddr + len - rest, rest);
3068 }
3069
3070 sector += len / sizeof(*dif_storep);
3071 resid -= len;
3072 }
3073 sg_miter_stop(&miter);
3074}
3075
3076static int prot_verify_read(struct scsi_cmnd *scp, sector_t start_sec,
3077 unsigned int sectors, u32 ei_lba)
3078{
3079 unsigned int i;
3080 sector_t sector;
3081 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
3082 scp->device->hostdata, true);
3083 struct t10_pi_tuple *sdt;
3084
3085 for (i = 0; i < sectors; i++, ei_lba++) {
3086 int ret;
3087
3088 sector = start_sec + i;
3089 sdt = dif_store(sip, sector);
3090
3091 if (sdt->app_tag == cpu_to_be16(0xffff))
3092 continue;
3093
3094 ret = dif_verify(sdt, lba2fake_store(sip, sector), sector,
3095 ei_lba);
3096 if (ret) {
3097 dif_errors++;
3098 return ret;
3099 }
3100 }
3101
3102 dif_copy_prot(scp, start_sec, sectors, true);
3103 dix_reads++;
3104
3105 return 0;
3106}
3107
3108static int resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3109{
3110 bool check_prot;
3111 u32 num;
3112 u32 ei_lba;
3113 int ret;
3114 u64 lba;
3115 struct sdeb_store_info *sip = devip2sip(devip, true);
3116 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
3117 u8 *cmd = scp->cmnd;
3118
3119 switch (cmd[0]) {
3120 case READ_16:
3121 ei_lba = 0;
3122 lba = get_unaligned_be64(cmd + 2);
3123 num = get_unaligned_be32(cmd + 10);
3124 check_prot = true;
3125 break;
3126 case READ_10:
3127 ei_lba = 0;
3128 lba = get_unaligned_be32(cmd + 2);
3129 num = get_unaligned_be16(cmd + 7);
3130 check_prot = true;
3131 break;
3132 case READ_6:
3133 ei_lba = 0;
3134 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
3135 (u32)(cmd[1] & 0x1f) << 16;
3136 num = (0 == cmd[4]) ? 256 : cmd[4];
3137 check_prot = true;
3138 break;
3139 case READ_12:
3140 ei_lba = 0;
3141 lba = get_unaligned_be32(cmd + 2);
3142 num = get_unaligned_be32(cmd + 6);
3143 check_prot = true;
3144 break;
3145 case XDWRITEREAD_10:
3146 ei_lba = 0;
3147 lba = get_unaligned_be32(cmd + 2);
3148 num = get_unaligned_be16(cmd + 7);
3149 check_prot = false;
3150 break;
3151 default: /* assume READ(32) */
3152 lba = get_unaligned_be64(cmd + 12);
3153 ei_lba = get_unaligned_be32(cmd + 20);
3154 num = get_unaligned_be32(cmd + 28);
3155 check_prot = false;
3156 break;
3157 }
3158 if (unlikely(have_dif_prot && check_prot)) {
3159 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3160 (cmd[1] & 0xe0)) {
3161 mk_sense_invalid_opcode(scp);
3162 return check_condition_result;
3163 }
3164 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3165 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3166 (cmd[1] & 0xe0) == 0)
3167 sdev_printk(KERN_ERR, scp->device, "Unprotected RD "
3168 "to DIF device\n");
3169 }
3170 if (unlikely((sdebug_opts & SDEBUG_OPT_SHORT_TRANSFER) &&
3171 atomic_read(&sdeb_inject_pending))) {
3172 num /= 2;
3173 atomic_set(&sdeb_inject_pending, 0);
3174 }
3175
3176 ret = check_device_access_params(scp, lba, num, false);
3177 if (ret)
3178 return ret;
3179 if (unlikely((SDEBUG_OPT_MEDIUM_ERR & sdebug_opts) &&
3180 (lba <= (sdebug_medium_error_start + sdebug_medium_error_count - 1)) &&
3181 ((lba + num) > sdebug_medium_error_start))) {
3182 /* claim unrecoverable read error */
3183 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
3184 /* set info field and valid bit for fixed descriptor */
3185 if (0x70 == (scp->sense_buffer[0] & 0x7f)) {
3186 scp->sense_buffer[0] |= 0x80; /* Valid bit */
3187 ret = (lba < OPT_MEDIUM_ERR_ADDR)
3188 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
3189 put_unaligned_be32(ret, scp->sense_buffer + 3);
3190 }
3191 scsi_set_resid(scp, scsi_bufflen(scp));
3192 return check_condition_result;
3193 }
3194
3195 read_lock(macc_lckp);
3196
3197 /* DIX + T10 DIF */
3198 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3199 int prot_ret = prot_verify_read(scp, lba, num, ei_lba);
3200
3201 if (prot_ret) {
3202 read_unlock(macc_lckp);
3203 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, prot_ret);
3204 return illegal_condition_result;
3205 }
3206 }
3207
3208 ret = do_device_access(sip, scp, 0, lba, num, false);
3209 read_unlock(macc_lckp);
3210 if (unlikely(ret == -1))
3211 return DID_ERROR << 16;
3212
3213 scsi_set_resid(scp, scsi_bufflen(scp) - ret);
3214
3215 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
3216 atomic_read(&sdeb_inject_pending))) {
3217 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
3218 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
3219 atomic_set(&sdeb_inject_pending, 0);
3220 return check_condition_result;
3221 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
3222 /* Logical block guard check failed */
3223 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3224 atomic_set(&sdeb_inject_pending, 0);
3225 return illegal_condition_result;
3226 } else if (SDEBUG_OPT_DIX_ERR & sdebug_opts) {
3227 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3228 atomic_set(&sdeb_inject_pending, 0);
3229 return illegal_condition_result;
3230 }
3231 }
3232 return 0;
3233}
3234
3235static void dump_sector(unsigned char *buf, int len)
3236{
3237 int i, j, n;
3238
3239 pr_err(">>> Sector Dump <<<\n");
3240 for (i = 0 ; i < len ; i += 16) {
3241 char b[128];
3242
3243 for (j = 0, n = 0; j < 16; j++) {
3244 unsigned char c = buf[i+j];
3245
3246 if (c >= 0x20 && c < 0x7e)
3247 n += scnprintf(b + n, sizeof(b) - n,
3248 " %c ", buf[i+j]);
3249 else
3250 n += scnprintf(b + n, sizeof(b) - n,
3251 "%02x ", buf[i+j]);
3252 }
3253 pr_err("%04d: %s\n", i, b);
3254 }
3255}
3256
3257static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
3258 unsigned int sectors, u32 ei_lba)
3259{
3260 int ret;
3261 struct t10_pi_tuple *sdt;
3262 void *daddr;
3263 sector_t sector = start_sec;
3264 int ppage_offset;
3265 int dpage_offset;
3266 struct sg_mapping_iter diter;
3267 struct sg_mapping_iter piter;
3268
3269 BUG_ON(scsi_sg_count(SCpnt) == 0);
3270 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
3271
3272 sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
3273 scsi_prot_sg_count(SCpnt),
3274 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
3275 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
3276 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
3277
3278 /* For each protection page */
3279 while (sg_miter_next(&piter)) {
3280 dpage_offset = 0;
3281 if (WARN_ON(!sg_miter_next(&diter))) {
3282 ret = 0x01;
3283 goto out;
3284 }
3285
3286 for (ppage_offset = 0; ppage_offset < piter.length;
3287 ppage_offset += sizeof(struct t10_pi_tuple)) {
3288 /* If we're at the end of the current
3289 * data page advance to the next one
3290 */
3291 if (dpage_offset >= diter.length) {
3292 if (WARN_ON(!sg_miter_next(&diter))) {
3293 ret = 0x01;
3294 goto out;
3295 }
3296 dpage_offset = 0;
3297 }
3298
3299 sdt = piter.addr + ppage_offset;
3300 daddr = diter.addr + dpage_offset;
3301
3302 ret = dif_verify(sdt, daddr, sector, ei_lba);
3303 if (ret) {
3304 dump_sector(daddr, sdebug_sector_size);
3305 goto out;
3306 }
3307
3308 sector++;
3309 ei_lba++;
3310 dpage_offset += sdebug_sector_size;
3311 }
3312 diter.consumed = dpage_offset;
3313 sg_miter_stop(&diter);
3314 }
3315 sg_miter_stop(&piter);
3316
3317 dif_copy_prot(SCpnt, start_sec, sectors, false);
3318 dix_writes++;
3319
3320 return 0;
3321
3322out:
3323 dif_errors++;
3324 sg_miter_stop(&diter);
3325 sg_miter_stop(&piter);
3326 return ret;
3327}
3328
3329static unsigned long lba_to_map_index(sector_t lba)
3330{
3331 if (sdebug_unmap_alignment)
3332 lba += sdebug_unmap_granularity - sdebug_unmap_alignment;
3333 sector_div(lba, sdebug_unmap_granularity);
3334 return lba;
3335}
3336
3337static sector_t map_index_to_lba(unsigned long index)
3338{
3339 sector_t lba = index * sdebug_unmap_granularity;
3340
3341 if (sdebug_unmap_alignment)
3342 lba -= sdebug_unmap_granularity - sdebug_unmap_alignment;
3343 return lba;
3344}
3345
3346static unsigned int map_state(struct sdeb_store_info *sip, sector_t lba,
3347 unsigned int *num)
3348{
3349 sector_t end;
3350 unsigned int mapped;
3351 unsigned long index;
3352 unsigned long next;
3353
3354 index = lba_to_map_index(lba);
3355 mapped = test_bit(index, sip->map_storep);
3356
3357 if (mapped)
3358 next = find_next_zero_bit(sip->map_storep, map_size, index);
3359 else
3360 next = find_next_bit(sip->map_storep, map_size, index);
3361
3362 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
3363 *num = end - lba;
3364 return mapped;
3365}
3366
3367static void map_region(struct sdeb_store_info *sip, sector_t lba,
3368 unsigned int len)
3369{
3370 sector_t end = lba + len;
3371
3372 while (lba < end) {
3373 unsigned long index = lba_to_map_index(lba);
3374
3375 if (index < map_size)
3376 set_bit(index, sip->map_storep);
3377
3378 lba = map_index_to_lba(index + 1);
3379 }
3380}
3381
3382static void unmap_region(struct sdeb_store_info *sip, sector_t lba,
3383 unsigned int len)
3384{
3385 sector_t end = lba + len;
3386 u8 *fsp = sip->storep;
3387
3388 while (lba < end) {
3389 unsigned long index = lba_to_map_index(lba);
3390
3391 if (lba == map_index_to_lba(index) &&
3392 lba + sdebug_unmap_granularity <= end &&
3393 index < map_size) {
3394 clear_bit(index, sip->map_storep);
3395 if (sdebug_lbprz) { /* for LBPRZ=2 return 0xff_s */
3396 memset(fsp + lba * sdebug_sector_size,
3397 (sdebug_lbprz & 1) ? 0 : 0xff,
3398 sdebug_sector_size *
3399 sdebug_unmap_granularity);
3400 }
3401 if (sip->dif_storep) {
3402 memset(sip->dif_storep + lba, 0xff,
3403 sizeof(*sip->dif_storep) *
3404 sdebug_unmap_granularity);
3405 }
3406 }
3407 lba = map_index_to_lba(index + 1);
3408 }
3409}
3410
3411static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3412{
3413 bool check_prot;
3414 u32 num;
3415 u32 ei_lba;
3416 int ret;
3417 u64 lba;
3418 struct sdeb_store_info *sip = devip2sip(devip, true);
3419 rwlock_t *macc_lckp = &sip->macc_lck;
3420 u8 *cmd = scp->cmnd;
3421
3422 switch (cmd[0]) {
3423 case WRITE_16:
3424 ei_lba = 0;
3425 lba = get_unaligned_be64(cmd + 2);
3426 num = get_unaligned_be32(cmd + 10);
3427 check_prot = true;
3428 break;
3429 case WRITE_10:
3430 ei_lba = 0;
3431 lba = get_unaligned_be32(cmd + 2);
3432 num = get_unaligned_be16(cmd + 7);
3433 check_prot = true;
3434 break;
3435 case WRITE_6:
3436 ei_lba = 0;
3437 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
3438 (u32)(cmd[1] & 0x1f) << 16;
3439 num = (0 == cmd[4]) ? 256 : cmd[4];
3440 check_prot = true;
3441 break;
3442 case WRITE_12:
3443 ei_lba = 0;
3444 lba = get_unaligned_be32(cmd + 2);
3445 num = get_unaligned_be32(cmd + 6);
3446 check_prot = true;
3447 break;
3448 case 0x53: /* XDWRITEREAD(10) */
3449 ei_lba = 0;
3450 lba = get_unaligned_be32(cmd + 2);
3451 num = get_unaligned_be16(cmd + 7);
3452 check_prot = false;
3453 break;
3454 default: /* assume WRITE(32) */
3455 lba = get_unaligned_be64(cmd + 12);
3456 ei_lba = get_unaligned_be32(cmd + 20);
3457 num = get_unaligned_be32(cmd + 28);
3458 check_prot = false;
3459 break;
3460 }
3461 if (unlikely(have_dif_prot && check_prot)) {
3462 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3463 (cmd[1] & 0xe0)) {
3464 mk_sense_invalid_opcode(scp);
3465 return check_condition_result;
3466 }
3467 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3468 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3469 (cmd[1] & 0xe0) == 0)
3470 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3471 "to DIF device\n");
3472 }
3473
3474 write_lock(macc_lckp);
3475 ret = check_device_access_params(scp, lba, num, true);
3476 if (ret) {
3477 write_unlock(macc_lckp);
3478 return ret;
3479 }
3480
3481 /* DIX + T10 DIF */
3482 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3483 int prot_ret = prot_verify_write(scp, lba, num, ei_lba);
3484
3485 if (prot_ret) {
3486 write_unlock(macc_lckp);
3487 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, prot_ret);
3488 return illegal_condition_result;
3489 }
3490 }
3491
3492 ret = do_device_access(sip, scp, 0, lba, num, true);
3493 if (unlikely(scsi_debug_lbp()))
3494 map_region(sip, lba, num);
3495 /* If ZBC zone then bump its write pointer */
3496 if (sdebug_dev_is_zoned(devip))
3497 zbc_inc_wp(devip, lba, num);
3498 write_unlock(macc_lckp);
3499 if (unlikely(-1 == ret))
3500 return DID_ERROR << 16;
3501 else if (unlikely(sdebug_verbose &&
3502 (ret < (num * sdebug_sector_size))))
3503 sdev_printk(KERN_INFO, scp->device,
3504 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
3505 my_name, num * sdebug_sector_size, ret);
3506
3507 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
3508 atomic_read(&sdeb_inject_pending))) {
3509 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
3510 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
3511 atomic_set(&sdeb_inject_pending, 0);
3512 return check_condition_result;
3513 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
3514 /* Logical block guard check failed */
3515 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3516 atomic_set(&sdeb_inject_pending, 0);
3517 return illegal_condition_result;
3518 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) {
3519 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3520 atomic_set(&sdeb_inject_pending, 0);
3521 return illegal_condition_result;
3522 }
3523 }
3524 return 0;
3525}
3526
3527/*
3528 * T10 has only specified WRITE SCATTERED(16) and WRITE SCATTERED(32).
3529 * No READ GATHERED yet (requires bidi or long cdb holding gather list).
3530 */
3531static int resp_write_scat(struct scsi_cmnd *scp,
3532 struct sdebug_dev_info *devip)
3533{
3534 u8 *cmd = scp->cmnd;
3535 u8 *lrdp = NULL;
3536 u8 *up;
3537 struct sdeb_store_info *sip = devip2sip(devip, true);
3538 rwlock_t *macc_lckp = &sip->macc_lck;
3539 u8 wrprotect;
3540 u16 lbdof, num_lrd, k;
3541 u32 num, num_by, bt_len, lbdof_blen, sg_off, cum_lb;
3542 u32 lb_size = sdebug_sector_size;
3543 u32 ei_lba;
3544 u64 lba;
3545 int ret, res;
3546 bool is_16;
3547 static const u32 lrd_size = 32; /* + parameter list header size */
3548
3549 if (cmd[0] == VARIABLE_LENGTH_CMD) {
3550 is_16 = false;
3551 wrprotect = (cmd[10] >> 5) & 0x7;
3552 lbdof = get_unaligned_be16(cmd + 12);
3553 num_lrd = get_unaligned_be16(cmd + 16);
3554 bt_len = get_unaligned_be32(cmd + 28);
3555 } else { /* that leaves WRITE SCATTERED(16) */
3556 is_16 = true;
3557 wrprotect = (cmd[2] >> 5) & 0x7;
3558 lbdof = get_unaligned_be16(cmd + 4);
3559 num_lrd = get_unaligned_be16(cmd + 8);
3560 bt_len = get_unaligned_be32(cmd + 10);
3561 if (unlikely(have_dif_prot)) {
3562 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3563 wrprotect) {
3564 mk_sense_invalid_opcode(scp);
3565 return illegal_condition_result;
3566 }
3567 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3568 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3569 wrprotect == 0)
3570 sdev_printk(KERN_ERR, scp->device,
3571 "Unprotected WR to DIF device\n");
3572 }
3573 }
3574 if ((num_lrd == 0) || (bt_len == 0))
3575 return 0; /* T10 says these do-nothings are not errors */
3576 if (lbdof == 0) {
3577 if (sdebug_verbose)
3578 sdev_printk(KERN_INFO, scp->device,
3579 "%s: %s: LB Data Offset field bad\n",
3580 my_name, __func__);
3581 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3582 return illegal_condition_result;
3583 }
3584 lbdof_blen = lbdof * lb_size;
3585 if ((lrd_size + (num_lrd * lrd_size)) > lbdof_blen) {
3586 if (sdebug_verbose)
3587 sdev_printk(KERN_INFO, scp->device,
3588 "%s: %s: LBA range descriptors don't fit\n",
3589 my_name, __func__);
3590 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3591 return illegal_condition_result;
3592 }
3593 lrdp = kzalloc(lbdof_blen, GFP_ATOMIC);
3594 if (lrdp == NULL)
3595 return SCSI_MLQUEUE_HOST_BUSY;
3596 if (sdebug_verbose)
3597 sdev_printk(KERN_INFO, scp->device,
3598 "%s: %s: Fetch header+scatter_list, lbdof_blen=%u\n",
3599 my_name, __func__, lbdof_blen);
3600 res = fetch_to_dev_buffer(scp, lrdp, lbdof_blen);
3601 if (res == -1) {
3602 ret = DID_ERROR << 16;
3603 goto err_out;
3604 }
3605
3606 write_lock(macc_lckp);
3607 sg_off = lbdof_blen;
3608 /* Spec says Buffer xfer Length field in number of LBs in dout */
3609 cum_lb = 0;
3610 for (k = 0, up = lrdp + lrd_size; k < num_lrd; ++k, up += lrd_size) {
3611 lba = get_unaligned_be64(up + 0);
3612 num = get_unaligned_be32(up + 8);
3613 if (sdebug_verbose)
3614 sdev_printk(KERN_INFO, scp->device,
3615 "%s: %s: k=%d LBA=0x%llx num=%u sg_off=%u\n",
3616 my_name, __func__, k, lba, num, sg_off);
3617 if (num == 0)
3618 continue;
3619 ret = check_device_access_params(scp, lba, num, true);
3620 if (ret)
3621 goto err_out_unlock;
3622 num_by = num * lb_size;
3623 ei_lba = is_16 ? 0 : get_unaligned_be32(up + 12);
3624
3625 if ((cum_lb + num) > bt_len) {
3626 if (sdebug_verbose)
3627 sdev_printk(KERN_INFO, scp->device,
3628 "%s: %s: sum of blocks > data provided\n",
3629 my_name, __func__);
3630 mk_sense_buffer(scp, ILLEGAL_REQUEST, WRITE_ERROR_ASC,
3631 0);
3632 ret = illegal_condition_result;
3633 goto err_out_unlock;
3634 }
3635
3636 /* DIX + T10 DIF */
3637 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3638 int prot_ret = prot_verify_write(scp, lba, num,
3639 ei_lba);
3640
3641 if (prot_ret) {
3642 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10,
3643 prot_ret);
3644 ret = illegal_condition_result;
3645 goto err_out_unlock;
3646 }
3647 }
3648
3649 ret = do_device_access(sip, scp, sg_off, lba, num, true);
3650 /* If ZBC zone then bump its write pointer */
3651 if (sdebug_dev_is_zoned(devip))
3652 zbc_inc_wp(devip, lba, num);
3653 if (unlikely(scsi_debug_lbp()))
3654 map_region(sip, lba, num);
3655 if (unlikely(-1 == ret)) {
3656 ret = DID_ERROR << 16;
3657 goto err_out_unlock;
3658 } else if (unlikely(sdebug_verbose && (ret < num_by)))
3659 sdev_printk(KERN_INFO, scp->device,
3660 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
3661 my_name, num_by, ret);
3662
3663 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
3664 atomic_read(&sdeb_inject_pending))) {
3665 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
3666 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
3667 atomic_set(&sdeb_inject_pending, 0);
3668 ret = check_condition_result;
3669 goto err_out_unlock;
3670 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
3671 /* Logical block guard check failed */
3672 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3673 atomic_set(&sdeb_inject_pending, 0);
3674 ret = illegal_condition_result;
3675 goto err_out_unlock;
3676 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) {
3677 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3678 atomic_set(&sdeb_inject_pending, 0);
3679 ret = illegal_condition_result;
3680 goto err_out_unlock;
3681 }
3682 }
3683 sg_off += num_by;
3684 cum_lb += num;
3685 }
3686 ret = 0;
3687err_out_unlock:
3688 write_unlock(macc_lckp);
3689err_out:
3690 kfree(lrdp);
3691 return ret;
3692}
3693
3694static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num,
3695 u32 ei_lba, bool unmap, bool ndob)
3696{
3697 struct scsi_device *sdp = scp->device;
3698 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
3699 unsigned long long i;
3700 u64 block, lbaa;
3701 u32 lb_size = sdebug_sector_size;
3702 int ret;
3703 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
3704 scp->device->hostdata, true);
3705 rwlock_t *macc_lckp = &sip->macc_lck;
3706 u8 *fs1p;
3707 u8 *fsp;
3708
3709 write_lock(macc_lckp);
3710
3711 ret = check_device_access_params(scp, lba, num, true);
3712 if (ret) {
3713 write_unlock(macc_lckp);
3714 return ret;
3715 }
3716
3717 if (unmap && scsi_debug_lbp()) {
3718 unmap_region(sip, lba, num);
3719 goto out;
3720 }
3721 lbaa = lba;
3722 block = do_div(lbaa, sdebug_store_sectors);
3723 /* if ndob then zero 1 logical block, else fetch 1 logical block */
3724 fsp = sip->storep;
3725 fs1p = fsp + (block * lb_size);
3726 if (ndob) {
3727 memset(fs1p, 0, lb_size);
3728 ret = 0;
3729 } else
3730 ret = fetch_to_dev_buffer(scp, fs1p, lb_size);
3731
3732 if (-1 == ret) {
3733 write_unlock(&sip->macc_lck);
3734 return DID_ERROR << 16;
3735 } else if (sdebug_verbose && !ndob && (ret < lb_size))
3736 sdev_printk(KERN_INFO, scp->device,
3737 "%s: %s: lb size=%u, IO sent=%d bytes\n",
3738 my_name, "write same", lb_size, ret);
3739
3740 /* Copy first sector to remaining blocks */
3741 for (i = 1 ; i < num ; i++) {
3742 lbaa = lba + i;
3743 block = do_div(lbaa, sdebug_store_sectors);
3744 memmove(fsp + (block * lb_size), fs1p, lb_size);
3745 }
3746 if (scsi_debug_lbp())
3747 map_region(sip, lba, num);
3748 /* If ZBC zone then bump its write pointer */
3749 if (sdebug_dev_is_zoned(devip))
3750 zbc_inc_wp(devip, lba, num);
3751out:
3752 write_unlock(macc_lckp);
3753
3754 return 0;
3755}
3756
3757static int resp_write_same_10(struct scsi_cmnd *scp,
3758 struct sdebug_dev_info *devip)
3759{
3760 u8 *cmd = scp->cmnd;
3761 u32 lba;
3762 u16 num;
3763 u32 ei_lba = 0;
3764 bool unmap = false;
3765
3766 if (cmd[1] & 0x8) {
3767 if (sdebug_lbpws10 == 0) {
3768 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3769 return check_condition_result;
3770 } else
3771 unmap = true;
3772 }
3773 lba = get_unaligned_be32(cmd + 2);
3774 num = get_unaligned_be16(cmd + 7);
3775 if (num > sdebug_write_same_length) {
3776 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3777 return check_condition_result;
3778 }
3779 return resp_write_same(scp, lba, num, ei_lba, unmap, false);
3780}
3781
3782static int resp_write_same_16(struct scsi_cmnd *scp,
3783 struct sdebug_dev_info *devip)
3784{
3785 u8 *cmd = scp->cmnd;
3786 u64 lba;
3787 u32 num;
3788 u32 ei_lba = 0;
3789 bool unmap = false;
3790 bool ndob = false;
3791
3792 if (cmd[1] & 0x8) { /* UNMAP */
3793 if (sdebug_lbpws == 0) {
3794 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3795 return check_condition_result;
3796 } else
3797 unmap = true;
3798 }
3799 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */
3800 ndob = true;
3801 lba = get_unaligned_be64(cmd + 2);
3802 num = get_unaligned_be32(cmd + 10);
3803 if (num > sdebug_write_same_length) {
3804 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
3805 return check_condition_result;
3806 }
3807 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob);
3808}
3809
3810/* Note the mode field is in the same position as the (lower) service action
3811 * field. For the Report supported operation codes command, SPC-4 suggests
3812 * each mode of this command should be reported separately; for future. */
3813static int resp_write_buffer(struct scsi_cmnd *scp,
3814 struct sdebug_dev_info *devip)
3815{
3816 u8 *cmd = scp->cmnd;
3817 struct scsi_device *sdp = scp->device;
3818 struct sdebug_dev_info *dp;
3819 u8 mode;
3820
3821 mode = cmd[1] & 0x1f;
3822 switch (mode) {
3823 case 0x4: /* download microcode (MC) and activate (ACT) */
3824 /* set UAs on this device only */
3825 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3826 set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm);
3827 break;
3828 case 0x5: /* download MC, save and ACT */
3829 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm);
3830 break;
3831 case 0x6: /* download MC with offsets and ACT */
3832 /* set UAs on most devices (LUs) in this target */
3833 list_for_each_entry(dp,
3834 &devip->sdbg_host->dev_info_list,
3835 dev_list)
3836 if (dp->target == sdp->id) {
3837 set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm);
3838 if (devip != dp)
3839 set_bit(SDEBUG_UA_MICROCODE_CHANGED,
3840 dp->uas_bm);
3841 }
3842 break;
3843 case 0x7: /* download MC with offsets, save, and ACT */
3844 /* set UA on all devices (LUs) in this target */
3845 list_for_each_entry(dp,
3846 &devip->sdbg_host->dev_info_list,
3847 dev_list)
3848 if (dp->target == sdp->id)
3849 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET,
3850 dp->uas_bm);
3851 break;
3852 default:
3853 /* do nothing for this command for other mode values */
3854 break;
3855 }
3856 return 0;
3857}
3858
3859static int resp_comp_write(struct scsi_cmnd *scp,
3860 struct sdebug_dev_info *devip)
3861{
3862 u8 *cmd = scp->cmnd;
3863 u8 *arr;
3864 struct sdeb_store_info *sip = devip2sip(devip, true);
3865 rwlock_t *macc_lckp = &sip->macc_lck;
3866 u64 lba;
3867 u32 dnum;
3868 u32 lb_size = sdebug_sector_size;
3869 u8 num;
3870 int ret;
3871 int retval = 0;
3872
3873 lba = get_unaligned_be64(cmd + 2);
3874 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */
3875 if (0 == num)
3876 return 0; /* degenerate case, not an error */
3877 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3878 (cmd[1] & 0xe0)) {
3879 mk_sense_invalid_opcode(scp);
3880 return check_condition_result;
3881 }
3882 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3883 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3884 (cmd[1] & 0xe0) == 0)
3885 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3886 "to DIF device\n");
3887 ret = check_device_access_params(scp, lba, num, false);
3888 if (ret)
3889 return ret;
3890 dnum = 2 * num;
3891 arr = kcalloc(lb_size, dnum, GFP_ATOMIC);
3892 if (NULL == arr) {
3893 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3894 INSUFF_RES_ASCQ);
3895 return check_condition_result;
3896 }
3897
3898 write_lock(macc_lckp);
3899
3900 ret = do_dout_fetch(scp, dnum, arr);
3901 if (ret == -1) {
3902 retval = DID_ERROR << 16;
3903 goto cleanup;
3904 } else if (sdebug_verbose && (ret < (dnum * lb_size)))
3905 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb "
3906 "indicated=%u, IO sent=%d bytes\n", my_name,
3907 dnum * lb_size, ret);
3908 if (!comp_write_worker(sip, lba, num, arr, false)) {
3909 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
3910 retval = check_condition_result;
3911 goto cleanup;
3912 }
3913 if (scsi_debug_lbp())
3914 map_region(sip, lba, num);
3915cleanup:
3916 write_unlock(macc_lckp);
3917 kfree(arr);
3918 return retval;
3919}
3920
3921struct unmap_block_desc {
3922 __be64 lba;
3923 __be32 blocks;
3924 __be32 __reserved;
3925};
3926
3927static int resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3928{
3929 unsigned char *buf;
3930 struct unmap_block_desc *desc;
3931 struct sdeb_store_info *sip = devip2sip(devip, true);
3932 rwlock_t *macc_lckp = &sip->macc_lck;
3933 unsigned int i, payload_len, descriptors;
3934 int ret;
3935
3936 if (!scsi_debug_lbp())
3937 return 0; /* fib and say its done */
3938 payload_len = get_unaligned_be16(scp->cmnd + 7);
3939 BUG_ON(scsi_bufflen(scp) != payload_len);
3940
3941 descriptors = (payload_len - 8) / 16;
3942 if (descriptors > sdebug_unmap_max_desc) {
3943 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3944 return check_condition_result;
3945 }
3946
3947 buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC);
3948 if (!buf) {
3949 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3950 INSUFF_RES_ASCQ);
3951 return check_condition_result;
3952 }
3953
3954 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
3955
3956 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
3957 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
3958
3959 desc = (void *)&buf[8];
3960
3961 write_lock(macc_lckp);
3962
3963 for (i = 0 ; i < descriptors ; i++) {
3964 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
3965 unsigned int num = get_unaligned_be32(&desc[i].blocks);
3966
3967 ret = check_device_access_params(scp, lba, num, true);
3968 if (ret)
3969 goto out;
3970
3971 unmap_region(sip, lba, num);
3972 }
3973
3974 ret = 0;
3975
3976out:
3977 write_unlock(macc_lckp);
3978 kfree(buf);
3979
3980 return ret;
3981}
3982
3983#define SDEBUG_GET_LBA_STATUS_LEN 32
3984
3985static int resp_get_lba_status(struct scsi_cmnd *scp,
3986 struct sdebug_dev_info *devip)
3987{
3988 u8 *cmd = scp->cmnd;
3989 u64 lba;
3990 u32 alloc_len, mapped, num;
3991 int ret;
3992 u8 arr[SDEBUG_GET_LBA_STATUS_LEN];
3993
3994 lba = get_unaligned_be64(cmd + 2);
3995 alloc_len = get_unaligned_be32(cmd + 10);
3996
3997 if (alloc_len < 24)
3998 return 0;
3999
4000 ret = check_device_access_params(scp, lba, 1, false);
4001 if (ret)
4002 return ret;
4003
4004 if (scsi_debug_lbp()) {
4005 struct sdeb_store_info *sip = devip2sip(devip, true);
4006
4007 mapped = map_state(sip, lba, &num);
4008 } else {
4009 mapped = 1;
4010 /* following just in case virtual_gb changed */
4011 sdebug_capacity = get_sdebug_capacity();
4012 if (sdebug_capacity - lba <= 0xffffffff)
4013 num = sdebug_capacity - lba;
4014 else
4015 num = 0xffffffff;
4016 }
4017
4018 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
4019 put_unaligned_be32(20, arr); /* Parameter Data Length */
4020 put_unaligned_be64(lba, arr + 8); /* LBA */
4021 put_unaligned_be32(num, arr + 16); /* Number of blocks */
4022 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */
4023
4024 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN);
4025}
4026
4027static int resp_sync_cache(struct scsi_cmnd *scp,
4028 struct sdebug_dev_info *devip)
4029{
4030 int res = 0;
4031 u64 lba;
4032 u32 num_blocks;
4033 u8 *cmd = scp->cmnd;
4034
4035 if (cmd[0] == SYNCHRONIZE_CACHE) { /* 10 byte cdb */
4036 lba = get_unaligned_be32(cmd + 2);
4037 num_blocks = get_unaligned_be16(cmd + 7);
4038 } else { /* SYNCHRONIZE_CACHE(16) */
4039 lba = get_unaligned_be64(cmd + 2);
4040 num_blocks = get_unaligned_be32(cmd + 10);
4041 }
4042 if (lba + num_blocks > sdebug_capacity) {
4043 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4044 return check_condition_result;
4045 }
4046 if (!write_since_sync || (cmd[1] & 0x2))
4047 res = SDEG_RES_IMMED_MASK;
4048 else /* delay if write_since_sync and IMMED clear */
4049 write_since_sync = false;
4050 return res;
4051}
4052
4053/*
4054 * Assuming the LBA+num_blocks is not out-of-range, this function will return
4055 * CONDITION MET if the specified blocks will/have fitted in the cache, and
4056 * a GOOD status otherwise. Model a disk with a big cache and yield
4057 * CONDITION MET. Actually tries to bring range in main memory into the
4058 * cache associated with the CPU(s).
4059 */
4060static int resp_pre_fetch(struct scsi_cmnd *scp,
4061 struct sdebug_dev_info *devip)
4062{
4063 int res = 0;
4064 u64 lba;
4065 u64 block, rest = 0;
4066 u32 nblks;
4067 u8 *cmd = scp->cmnd;
4068 struct sdeb_store_info *sip = devip2sip(devip, true);
4069 rwlock_t *macc_lckp = &sip->macc_lck;
4070 u8 *fsp = sip->storep;
4071
4072 if (cmd[0] == PRE_FETCH) { /* 10 byte cdb */
4073 lba = get_unaligned_be32(cmd + 2);
4074 nblks = get_unaligned_be16(cmd + 7);
4075 } else { /* PRE-FETCH(16) */
4076 lba = get_unaligned_be64(cmd + 2);
4077 nblks = get_unaligned_be32(cmd + 10);
4078 }
4079 if (lba + nblks > sdebug_capacity) {
4080 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4081 return check_condition_result;
4082 }
4083 if (!fsp)
4084 goto fini;
4085 /* PRE-FETCH spec says nothing about LBP or PI so skip them */
4086 block = do_div(lba, sdebug_store_sectors);
4087 if (block + nblks > sdebug_store_sectors)
4088 rest = block + nblks - sdebug_store_sectors;
4089
4090 /* Try to bring the PRE-FETCH range into CPU's cache */
4091 read_lock(macc_lckp);
4092 prefetch_range(fsp + (sdebug_sector_size * block),
4093 (nblks - rest) * sdebug_sector_size);
4094 if (rest)
4095 prefetch_range(fsp, rest * sdebug_sector_size);
4096 read_unlock(macc_lckp);
4097fini:
4098 if (cmd[1] & 0x2)
4099 res = SDEG_RES_IMMED_MASK;
4100 return res | condition_met_result;
4101}
4102
4103#define RL_BUCKET_ELEMS 8
4104
4105/* Even though each pseudo target has a REPORT LUNS "well known logical unit"
4106 * (W-LUN), the normal Linux scanning logic does not associate it with a
4107 * device (e.g. /dev/sg7). The following magic will make that association:
4108 * "cd /sys/class/scsi_host/host<n> ; echo '- - 49409' > scan"
4109 * where <n> is a host number. If there are multiple targets in a host then
4110 * the above will associate a W-LUN to each target. To only get a W-LUN
4111 * for target 2, then use "echo '- 2 49409' > scan" .
4112 */
4113static int resp_report_luns(struct scsi_cmnd *scp,
4114 struct sdebug_dev_info *devip)
4115{
4116 unsigned char *cmd = scp->cmnd;
4117 unsigned int alloc_len;
4118 unsigned char select_report;
4119 u64 lun;
4120 struct scsi_lun *lun_p;
4121 u8 arr[RL_BUCKET_ELEMS * sizeof(struct scsi_lun)];
4122 unsigned int lun_cnt; /* normal LUN count (max: 256) */
4123 unsigned int wlun_cnt; /* report luns W-LUN count */
4124 unsigned int tlun_cnt; /* total LUN count */
4125 unsigned int rlen; /* response length (in bytes) */
4126 int k, j, n, res;
4127 unsigned int off_rsp = 0;
4128 const int sz_lun = sizeof(struct scsi_lun);
4129
4130 clear_luns_changed_on_target(devip);
4131
4132 select_report = cmd[2];
4133 alloc_len = get_unaligned_be32(cmd + 6);
4134
4135 if (alloc_len < 4) {
4136 pr_err("alloc len too small %d\n", alloc_len);
4137 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
4138 return check_condition_result;
4139 }
4140
4141 switch (select_report) {
4142 case 0: /* all LUNs apart from W-LUNs */
4143 lun_cnt = sdebug_max_luns;
4144 wlun_cnt = 0;
4145 break;
4146 case 1: /* only W-LUNs */
4147 lun_cnt = 0;
4148 wlun_cnt = 1;
4149 break;
4150 case 2: /* all LUNs */
4151 lun_cnt = sdebug_max_luns;
4152 wlun_cnt = 1;
4153 break;
4154 case 0x10: /* only administrative LUs */
4155 case 0x11: /* see SPC-5 */
4156 case 0x12: /* only subsiduary LUs owned by referenced LU */
4157 default:
4158 pr_debug("select report invalid %d\n", select_report);
4159 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
4160 return check_condition_result;
4161 }
4162
4163 if (sdebug_no_lun_0 && (lun_cnt > 0))
4164 --lun_cnt;
4165
4166 tlun_cnt = lun_cnt + wlun_cnt;
4167 rlen = tlun_cnt * sz_lun; /* excluding 8 byte header */
4168 scsi_set_resid(scp, scsi_bufflen(scp));
4169 pr_debug("select_report %d luns = %d wluns = %d no_lun0 %d\n",
4170 select_report, lun_cnt, wlun_cnt, sdebug_no_lun_0);
4171
4172 /* loops rely on sizeof response header same as sizeof lun (both 8) */
4173 lun = sdebug_no_lun_0 ? 1 : 0;
4174 for (k = 0, j = 0, res = 0; true; ++k, j = 0) {
4175 memset(arr, 0, sizeof(arr));
4176 lun_p = (struct scsi_lun *)&arr[0];
4177 if (k == 0) {
4178 put_unaligned_be32(rlen, &arr[0]);
4179 ++lun_p;
4180 j = 1;
4181 }
4182 for ( ; j < RL_BUCKET_ELEMS; ++j, ++lun_p) {
4183 if ((k * RL_BUCKET_ELEMS) + j > lun_cnt)
4184 break;
4185 int_to_scsilun(lun++, lun_p);
4186 if (lun > 1 && sdebug_lun_am == SAM_LUN_AM_FLAT)
4187 lun_p->scsi_lun[0] |= 0x40;
4188 }
4189 if (j < RL_BUCKET_ELEMS)
4190 break;
4191 n = j * sz_lun;
4192 res = p_fill_from_dev_buffer(scp, arr, n, off_rsp);
4193 if (res)
4194 return res;
4195 off_rsp += n;
4196 }
4197 if (wlun_cnt) {
4198 int_to_scsilun(SCSI_W_LUN_REPORT_LUNS, lun_p);
4199 ++j;
4200 }
4201 if (j > 0)
4202 res = p_fill_from_dev_buffer(scp, arr, j * sz_lun, off_rsp);
4203 return res;
4204}
4205
4206static int resp_verify(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4207{
4208 bool is_bytchk3 = false;
4209 u8 bytchk;
4210 int ret, j;
4211 u32 vnum, a_num, off;
4212 const u32 lb_size = sdebug_sector_size;
4213 u64 lba;
4214 u8 *arr;
4215 u8 *cmd = scp->cmnd;
4216 struct sdeb_store_info *sip = devip2sip(devip, true);
4217 rwlock_t *macc_lckp = &sip->macc_lck;
4218
4219 bytchk = (cmd[1] >> 1) & 0x3;
4220 if (bytchk == 0) {
4221 return 0; /* always claim internal verify okay */
4222 } else if (bytchk == 2) {
4223 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
4224 return check_condition_result;
4225 } else if (bytchk == 3) {
4226 is_bytchk3 = true; /* 1 block sent, compared repeatedly */
4227 }
4228 switch (cmd[0]) {
4229 case VERIFY_16:
4230 lba = get_unaligned_be64(cmd + 2);
4231 vnum = get_unaligned_be32(cmd + 10);
4232 break;
4233 case VERIFY: /* is VERIFY(10) */
4234 lba = get_unaligned_be32(cmd + 2);
4235 vnum = get_unaligned_be16(cmd + 7);
4236 break;
4237 default:
4238 mk_sense_invalid_opcode(scp);
4239 return check_condition_result;
4240 }
4241 a_num = is_bytchk3 ? 1 : vnum;
4242 /* Treat following check like one for read (i.e. no write) access */
4243 ret = check_device_access_params(scp, lba, a_num, false);
4244 if (ret)
4245 return ret;
4246
4247 arr = kcalloc(lb_size, vnum, GFP_ATOMIC);
4248 if (!arr) {
4249 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
4250 INSUFF_RES_ASCQ);
4251 return check_condition_result;
4252 }
4253 /* Not changing store, so only need read access */
4254 read_lock(macc_lckp);
4255
4256 ret = do_dout_fetch(scp, a_num, arr);
4257 if (ret == -1) {
4258 ret = DID_ERROR << 16;
4259 goto cleanup;
4260 } else if (sdebug_verbose && (ret < (a_num * lb_size))) {
4261 sdev_printk(KERN_INFO, scp->device,
4262 "%s: %s: cdb indicated=%u, IO sent=%d bytes\n",
4263 my_name, __func__, a_num * lb_size, ret);
4264 }
4265 if (is_bytchk3) {
4266 for (j = 1, off = lb_size; j < vnum; ++j, off += lb_size)
4267 memcpy(arr + off, arr, lb_size);
4268 }
4269 ret = 0;
4270 if (!comp_write_worker(sip, lba, vnum, arr, true)) {
4271 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
4272 ret = check_condition_result;
4273 goto cleanup;
4274 }
4275cleanup:
4276 read_unlock(macc_lckp);
4277 kfree(arr);
4278 return ret;
4279}
4280
4281#define RZONES_DESC_HD 64
4282
4283/* Report zones depending on start LBA nad reporting options */
4284static int resp_report_zones(struct scsi_cmnd *scp,
4285 struct sdebug_dev_info *devip)
4286{
4287 unsigned int i, max_zones, rep_max_zones, nrz = 0;
4288 int ret = 0;
4289 u32 alloc_len, rep_opts, rep_len;
4290 bool partial;
4291 u64 lba, zs_lba;
4292 u8 *arr = NULL, *desc;
4293 u8 *cmd = scp->cmnd;
4294 struct sdeb_zone_state *zsp;
4295 struct sdeb_store_info *sip = devip2sip(devip, false);
4296 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
4297
4298 if (!sdebug_dev_is_zoned(devip)) {
4299 mk_sense_invalid_opcode(scp);
4300 return check_condition_result;
4301 }
4302 zs_lba = get_unaligned_be64(cmd + 2);
4303 alloc_len = get_unaligned_be32(cmd + 10);
4304 rep_opts = cmd[14] & 0x3f;
4305 partial = cmd[14] & 0x80;
4306
4307 if (zs_lba >= sdebug_capacity) {
4308 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4309 return check_condition_result;
4310 }
4311
4312 max_zones = devip->nr_zones - (zs_lba >> devip->zsize_shift);
4313 rep_max_zones = min((alloc_len - 64) >> ilog2(RZONES_DESC_HD),
4314 max_zones);
4315
4316 arr = kcalloc(RZONES_DESC_HD, alloc_len, GFP_ATOMIC);
4317 if (!arr) {
4318 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
4319 INSUFF_RES_ASCQ);
4320 return check_condition_result;
4321 }
4322
4323 read_lock(macc_lckp);
4324
4325 desc = arr + 64;
4326 for (i = 0; i < max_zones; i++) {
4327 lba = zs_lba + devip->zsize * i;
4328 if (lba > sdebug_capacity)
4329 break;
4330 zsp = zbc_zone(devip, lba);
4331 switch (rep_opts) {
4332 case 0x00:
4333 /* All zones */
4334 break;
4335 case 0x01:
4336 /* Empty zones */
4337 if (zsp->z_cond != ZC1_EMPTY)
4338 continue;
4339 break;
4340 case 0x02:
4341 /* Implicit open zones */
4342 if (zsp->z_cond != ZC2_IMPLICIT_OPEN)
4343 continue;
4344 break;
4345 case 0x03:
4346 /* Explicit open zones */
4347 if (zsp->z_cond != ZC3_EXPLICIT_OPEN)
4348 continue;
4349 break;
4350 case 0x04:
4351 /* Closed zones */
4352 if (zsp->z_cond != ZC4_CLOSED)
4353 continue;
4354 break;
4355 case 0x05:
4356 /* Full zones */
4357 if (zsp->z_cond != ZC5_FULL)
4358 continue;
4359 break;
4360 case 0x06:
4361 case 0x07:
4362 case 0x10:
4363 /*
4364 * Read-only, offline, reset WP recommended are
4365 * not emulated: no zones to report;
4366 */
4367 continue;
4368 case 0x11:
4369 /* non-seq-resource set */
4370 if (!zsp->z_non_seq_resource)
4371 continue;
4372 break;
4373 case 0x3f:
4374 /* Not write pointer (conventional) zones */
4375 if (!zbc_zone_is_conv(zsp))
4376 continue;
4377 break;
4378 default:
4379 mk_sense_buffer(scp, ILLEGAL_REQUEST,
4380 INVALID_FIELD_IN_CDB, 0);
4381 ret = check_condition_result;
4382 goto fini;
4383 }
4384
4385 if (nrz < rep_max_zones) {
4386 /* Fill zone descriptor */
4387 desc[0] = zsp->z_type;
4388 desc[1] = zsp->z_cond << 4;
4389 if (zsp->z_non_seq_resource)
4390 desc[1] |= 1 << 1;
4391 put_unaligned_be64((u64)zsp->z_size, desc + 8);
4392 put_unaligned_be64((u64)zsp->z_start, desc + 16);
4393 put_unaligned_be64((u64)zsp->z_wp, desc + 24);
4394 desc += 64;
4395 }
4396
4397 if (partial && nrz >= rep_max_zones)
4398 break;
4399
4400 nrz++;
4401 }
4402
4403 /* Report header */
4404 put_unaligned_be32(nrz * RZONES_DESC_HD, arr + 0);
4405 put_unaligned_be64(sdebug_capacity - 1, arr + 8);
4406
4407 rep_len = (unsigned long)desc - (unsigned long)arr;
4408 ret = fill_from_dev_buffer(scp, arr, min_t(int, alloc_len, rep_len));
4409
4410fini:
4411 read_unlock(macc_lckp);
4412 kfree(arr);
4413 return ret;
4414}
4415
4416/* Logic transplanted from tcmu-runner, file_zbc.c */
4417static void zbc_open_all(struct sdebug_dev_info *devip)
4418{
4419 struct sdeb_zone_state *zsp = &devip->zstate[0];
4420 unsigned int i;
4421
4422 for (i = 0; i < devip->nr_zones; i++, zsp++) {
4423 if (zsp->z_cond == ZC4_CLOSED)
4424 zbc_open_zone(devip, &devip->zstate[i], true);
4425 }
4426}
4427
4428static int resp_open_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4429{
4430 int res = 0;
4431 u64 z_id;
4432 enum sdebug_z_cond zc;
4433 u8 *cmd = scp->cmnd;
4434 struct sdeb_zone_state *zsp;
4435 bool all = cmd[14] & 0x01;
4436 struct sdeb_store_info *sip = devip2sip(devip, false);
4437 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
4438
4439 if (!sdebug_dev_is_zoned(devip)) {
4440 mk_sense_invalid_opcode(scp);
4441 return check_condition_result;
4442 }
4443
4444 write_lock(macc_lckp);
4445
4446 if (all) {
4447 /* Check if all closed zones can be open */
4448 if (devip->max_open &&
4449 devip->nr_exp_open + devip->nr_closed > devip->max_open) {
4450 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC,
4451 INSUFF_ZONE_ASCQ);
4452 res = check_condition_result;
4453 goto fini;
4454 }
4455 /* Open all closed zones */
4456 zbc_open_all(devip);
4457 goto fini;
4458 }
4459
4460 /* Open the specified zone */
4461 z_id = get_unaligned_be64(cmd + 2);
4462 if (z_id >= sdebug_capacity) {
4463 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4464 res = check_condition_result;
4465 goto fini;
4466 }
4467
4468 zsp = zbc_zone(devip, z_id);
4469 if (z_id != zsp->z_start) {
4470 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4471 res = check_condition_result;
4472 goto fini;
4473 }
4474 if (zbc_zone_is_conv(zsp)) {
4475 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4476 res = check_condition_result;
4477 goto fini;
4478 }
4479
4480 zc = zsp->z_cond;
4481 if (zc == ZC3_EXPLICIT_OPEN || zc == ZC5_FULL)
4482 goto fini;
4483
4484 if (devip->max_open && devip->nr_exp_open >= devip->max_open) {
4485 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC,
4486 INSUFF_ZONE_ASCQ);
4487 res = check_condition_result;
4488 goto fini;
4489 }
4490
4491 zbc_open_zone(devip, zsp, true);
4492fini:
4493 write_unlock(macc_lckp);
4494 return res;
4495}
4496
4497static void zbc_close_all(struct sdebug_dev_info *devip)
4498{
4499 unsigned int i;
4500
4501 for (i = 0; i < devip->nr_zones; i++)
4502 zbc_close_zone(devip, &devip->zstate[i]);
4503}
4504
4505static int resp_close_zone(struct scsi_cmnd *scp,
4506 struct sdebug_dev_info *devip)
4507{
4508 int res = 0;
4509 u64 z_id;
4510 u8 *cmd = scp->cmnd;
4511 struct sdeb_zone_state *zsp;
4512 bool all = cmd[14] & 0x01;
4513 struct sdeb_store_info *sip = devip2sip(devip, false);
4514 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
4515
4516 if (!sdebug_dev_is_zoned(devip)) {
4517 mk_sense_invalid_opcode(scp);
4518 return check_condition_result;
4519 }
4520
4521 write_lock(macc_lckp);
4522
4523 if (all) {
4524 zbc_close_all(devip);
4525 goto fini;
4526 }
4527
4528 /* Close specified zone */
4529 z_id = get_unaligned_be64(cmd + 2);
4530 if (z_id >= sdebug_capacity) {
4531 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4532 res = check_condition_result;
4533 goto fini;
4534 }
4535
4536 zsp = zbc_zone(devip, z_id);
4537 if (z_id != zsp->z_start) {
4538 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4539 res = check_condition_result;
4540 goto fini;
4541 }
4542 if (zbc_zone_is_conv(zsp)) {
4543 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4544 res = check_condition_result;
4545 goto fini;
4546 }
4547
4548 zbc_close_zone(devip, zsp);
4549fini:
4550 write_unlock(macc_lckp);
4551 return res;
4552}
4553
4554static void zbc_finish_zone(struct sdebug_dev_info *devip,
4555 struct sdeb_zone_state *zsp, bool empty)
4556{
4557 enum sdebug_z_cond zc = zsp->z_cond;
4558
4559 if (zc == ZC4_CLOSED || zc == ZC2_IMPLICIT_OPEN ||
4560 zc == ZC3_EXPLICIT_OPEN || (empty && zc == ZC1_EMPTY)) {
4561 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)
4562 zbc_close_zone(devip, zsp);
4563 if (zsp->z_cond == ZC4_CLOSED)
4564 devip->nr_closed--;
4565 zsp->z_wp = zsp->z_start + zsp->z_size;
4566 zsp->z_cond = ZC5_FULL;
4567 }
4568}
4569
4570static void zbc_finish_all(struct sdebug_dev_info *devip)
4571{
4572 unsigned int i;
4573
4574 for (i = 0; i < devip->nr_zones; i++)
4575 zbc_finish_zone(devip, &devip->zstate[i], false);
4576}
4577
4578static int resp_finish_zone(struct scsi_cmnd *scp,
4579 struct sdebug_dev_info *devip)
4580{
4581 struct sdeb_zone_state *zsp;
4582 int res = 0;
4583 u64 z_id;
4584 u8 *cmd = scp->cmnd;
4585 bool all = cmd[14] & 0x01;
4586 struct sdeb_store_info *sip = devip2sip(devip, false);
4587 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
4588
4589 if (!sdebug_dev_is_zoned(devip)) {
4590 mk_sense_invalid_opcode(scp);
4591 return check_condition_result;
4592 }
4593
4594 write_lock(macc_lckp);
4595
4596 if (all) {
4597 zbc_finish_all(devip);
4598 goto fini;
4599 }
4600
4601 /* Finish the specified zone */
4602 z_id = get_unaligned_be64(cmd + 2);
4603 if (z_id >= sdebug_capacity) {
4604 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4605 res = check_condition_result;
4606 goto fini;
4607 }
4608
4609 zsp = zbc_zone(devip, z_id);
4610 if (z_id != zsp->z_start) {
4611 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4612 res = check_condition_result;
4613 goto fini;
4614 }
4615 if (zbc_zone_is_conv(zsp)) {
4616 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4617 res = check_condition_result;
4618 goto fini;
4619 }
4620
4621 zbc_finish_zone(devip, zsp, true);
4622fini:
4623 write_unlock(macc_lckp);
4624 return res;
4625}
4626
4627static void zbc_rwp_zone(struct sdebug_dev_info *devip,
4628 struct sdeb_zone_state *zsp)
4629{
4630 enum sdebug_z_cond zc;
4631
4632 if (zbc_zone_is_conv(zsp))
4633 return;
4634
4635 zc = zsp->z_cond;
4636 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)
4637 zbc_close_zone(devip, zsp);
4638
4639 if (zsp->z_cond == ZC4_CLOSED)
4640 devip->nr_closed--;
4641
4642 zsp->z_non_seq_resource = false;
4643 zsp->z_wp = zsp->z_start;
4644 zsp->z_cond = ZC1_EMPTY;
4645}
4646
4647static void zbc_rwp_all(struct sdebug_dev_info *devip)
4648{
4649 unsigned int i;
4650
4651 for (i = 0; i < devip->nr_zones; i++)
4652 zbc_rwp_zone(devip, &devip->zstate[i]);
4653}
4654
4655static int resp_rwp_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4656{
4657 struct sdeb_zone_state *zsp;
4658 int res = 0;
4659 u64 z_id;
4660 u8 *cmd = scp->cmnd;
4661 bool all = cmd[14] & 0x01;
4662 struct sdeb_store_info *sip = devip2sip(devip, false);
4663 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
4664
4665 if (!sdebug_dev_is_zoned(devip)) {
4666 mk_sense_invalid_opcode(scp);
4667 return check_condition_result;
4668 }
4669
4670 write_lock(macc_lckp);
4671
4672 if (all) {
4673 zbc_rwp_all(devip);
4674 goto fini;
4675 }
4676
4677 z_id = get_unaligned_be64(cmd + 2);
4678 if (z_id >= sdebug_capacity) {
4679 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4680 res = check_condition_result;
4681 goto fini;
4682 }
4683
4684 zsp = zbc_zone(devip, z_id);
4685 if (z_id != zsp->z_start) {
4686 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4687 res = check_condition_result;
4688 goto fini;
4689 }
4690 if (zbc_zone_is_conv(zsp)) {
4691 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4692 res = check_condition_result;
4693 goto fini;
4694 }
4695
4696 zbc_rwp_zone(devip, zsp);
4697fini:
4698 write_unlock(macc_lckp);
4699 return res;
4700}
4701
4702static struct sdebug_queue *get_queue(struct scsi_cmnd *cmnd)
4703{
4704 u16 hwq;
4705 u32 tag = blk_mq_unique_tag(cmnd->request);
4706
4707 hwq = blk_mq_unique_tag_to_hwq(tag);
4708
4709 pr_debug("tag=%#x, hwq=%d\n", tag, hwq);
4710 if (WARN_ON_ONCE(hwq >= submit_queues))
4711 hwq = 0;
4712
4713 return sdebug_q_arr + hwq;
4714}
4715
4716static u32 get_tag(struct scsi_cmnd *cmnd)
4717{
4718 return blk_mq_unique_tag(cmnd->request);
4719}
4720
4721/* Queued (deferred) command completions converge here. */
4722static void sdebug_q_cmd_complete(struct sdebug_defer *sd_dp)
4723{
4724 bool aborted = sd_dp->aborted;
4725 int qc_idx;
4726 int retiring = 0;
4727 unsigned long iflags;
4728 struct sdebug_queue *sqp;
4729 struct sdebug_queued_cmd *sqcp;
4730 struct scsi_cmnd *scp;
4731 struct sdebug_dev_info *devip;
4732
4733 if (unlikely(aborted))
4734 sd_dp->aborted = false;
4735 qc_idx = sd_dp->qc_idx;
4736 sqp = sdebug_q_arr + sd_dp->sqa_idx;
4737 if (sdebug_statistics) {
4738 atomic_inc(&sdebug_completions);
4739 if (raw_smp_processor_id() != sd_dp->issuing_cpu)
4740 atomic_inc(&sdebug_miss_cpus);
4741 }
4742 if (unlikely((qc_idx < 0) || (qc_idx >= SDEBUG_CANQUEUE))) {
4743 pr_err("wild qc_idx=%d\n", qc_idx);
4744 return;
4745 }
4746 spin_lock_irqsave(&sqp->qc_lock, iflags);
4747 sd_dp->defer_t = SDEB_DEFER_NONE;
4748 sqcp = &sqp->qc_arr[qc_idx];
4749 scp = sqcp->a_cmnd;
4750 if (unlikely(scp == NULL)) {
4751 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4752 pr_err("scp is NULL, sqa_idx=%d, qc_idx=%d, hc_idx=%d\n",
4753 sd_dp->sqa_idx, qc_idx, sd_dp->hc_idx);
4754 return;
4755 }
4756 devip = (struct sdebug_dev_info *)scp->device->hostdata;
4757 if (likely(devip))
4758 atomic_dec(&devip->num_in_q);
4759 else
4760 pr_err("devip=NULL\n");
4761 if (unlikely(atomic_read(&retired_max_queue) > 0))
4762 retiring = 1;
4763
4764 sqcp->a_cmnd = NULL;
4765 if (unlikely(!test_and_clear_bit(qc_idx, sqp->in_use_bm))) {
4766 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4767 pr_err("Unexpected completion\n");
4768 return;
4769 }
4770
4771 if (unlikely(retiring)) { /* user has reduced max_queue */
4772 int k, retval;
4773
4774 retval = atomic_read(&retired_max_queue);
4775 if (qc_idx >= retval) {
4776 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4777 pr_err("index %d too large\n", retval);
4778 return;
4779 }
4780 k = find_last_bit(sqp->in_use_bm, retval);
4781 if ((k < sdebug_max_queue) || (k == retval))
4782 atomic_set(&retired_max_queue, 0);
4783 else
4784 atomic_set(&retired_max_queue, k + 1);
4785 }
4786 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4787 if (unlikely(aborted)) {
4788 if (sdebug_verbose)
4789 pr_info("bypassing scsi_done() due to aborted cmd\n");
4790 return;
4791 }
4792 scp->scsi_done(scp); /* callback to mid level */
4793}
4794
4795/* When high resolution timer goes off this function is called. */
4796static enum hrtimer_restart sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
4797{
4798 struct sdebug_defer *sd_dp = container_of(timer, struct sdebug_defer,
4799 hrt);
4800 sdebug_q_cmd_complete(sd_dp);
4801 return HRTIMER_NORESTART;
4802}
4803
4804/* When work queue schedules work, it calls this function. */
4805static void sdebug_q_cmd_wq_complete(struct work_struct *work)
4806{
4807 struct sdebug_defer *sd_dp = container_of(work, struct sdebug_defer,
4808 ew.work);
4809 sdebug_q_cmd_complete(sd_dp);
4810}
4811
4812static bool got_shared_uuid;
4813static uuid_t shared_uuid;
4814
4815static int sdebug_device_create_zones(struct sdebug_dev_info *devip)
4816{
4817 struct sdeb_zone_state *zsp;
4818 sector_t capacity = get_sdebug_capacity();
4819 sector_t zstart = 0;
4820 unsigned int i;
4821
4822 /*
4823 * Set the zone size: if sdeb_zbc_zone_size_mb is not set, figure out
4824 * a zone size allowing for at least 4 zones on the device. Otherwise,
4825 * use the specified zone size checking that at least 2 zones can be
4826 * created for the device.
4827 */
4828 if (!sdeb_zbc_zone_size_mb) {
4829 devip->zsize = (DEF_ZBC_ZONE_SIZE_MB * SZ_1M)
4830 >> ilog2(sdebug_sector_size);
4831 while (capacity < devip->zsize << 2 && devip->zsize >= 2)
4832 devip->zsize >>= 1;
4833 if (devip->zsize < 2) {
4834 pr_err("Device capacity too small\n");
4835 return -EINVAL;
4836 }
4837 } else {
4838 if (!is_power_of_2(sdeb_zbc_zone_size_mb)) {
4839 pr_err("Zone size is not a power of 2\n");
4840 return -EINVAL;
4841 }
4842 devip->zsize = (sdeb_zbc_zone_size_mb * SZ_1M)
4843 >> ilog2(sdebug_sector_size);
4844 if (devip->zsize >= capacity) {
4845 pr_err("Zone size too large for device capacity\n");
4846 return -EINVAL;
4847 }
4848 }
4849
4850 devip->zsize_shift = ilog2(devip->zsize);
4851 devip->nr_zones = (capacity + devip->zsize - 1) >> devip->zsize_shift;
4852
4853 if (sdeb_zbc_nr_conv >= devip->nr_zones) {
4854 pr_err("Number of conventional zones too large\n");
4855 return -EINVAL;
4856 }
4857 devip->nr_conv_zones = sdeb_zbc_nr_conv;
4858
4859 if (devip->zmodel == BLK_ZONED_HM) {
4860 /* zbc_max_open_zones can be 0, meaning "not reported" */
4861 if (sdeb_zbc_max_open >= devip->nr_zones - 1)
4862 devip->max_open = (devip->nr_zones - 1) / 2;
4863 else
4864 devip->max_open = sdeb_zbc_max_open;
4865 }
4866
4867 devip->zstate = kcalloc(devip->nr_zones,
4868 sizeof(struct sdeb_zone_state), GFP_KERNEL);
4869 if (!devip->zstate)
4870 return -ENOMEM;
4871
4872 for (i = 0; i < devip->nr_zones; i++) {
4873 zsp = &devip->zstate[i];
4874
4875 zsp->z_start = zstart;
4876
4877 if (i < devip->nr_conv_zones) {
4878 zsp->z_type = ZBC_ZONE_TYPE_CNV;
4879 zsp->z_cond = ZBC_NOT_WRITE_POINTER;
4880 zsp->z_wp = (sector_t)-1;
4881 } else {
4882 if (devip->zmodel == BLK_ZONED_HM)
4883 zsp->z_type = ZBC_ZONE_TYPE_SWR;
4884 else
4885 zsp->z_type = ZBC_ZONE_TYPE_SWP;
4886 zsp->z_cond = ZC1_EMPTY;
4887 zsp->z_wp = zsp->z_start;
4888 }
4889
4890 if (zsp->z_start + devip->zsize < capacity)
4891 zsp->z_size = devip->zsize;
4892 else
4893 zsp->z_size = capacity - zsp->z_start;
4894
4895 zstart += zsp->z_size;
4896 }
4897
4898 return 0;
4899}
4900
4901static struct sdebug_dev_info *sdebug_device_create(
4902 struct sdebug_host_info *sdbg_host, gfp_t flags)
4903{
4904 struct sdebug_dev_info *devip;
4905
4906 devip = kzalloc(sizeof(*devip), flags);
4907 if (devip) {
4908 if (sdebug_uuid_ctl == 1)
4909 uuid_gen(&devip->lu_name);
4910 else if (sdebug_uuid_ctl == 2) {
4911 if (got_shared_uuid)
4912 devip->lu_name = shared_uuid;
4913 else {
4914 uuid_gen(&shared_uuid);
4915 got_shared_uuid = true;
4916 devip->lu_name = shared_uuid;
4917 }
4918 }
4919 devip->sdbg_host = sdbg_host;
4920 if (sdeb_zbc_in_use) {
4921 devip->zmodel = sdeb_zbc_model;
4922 if (sdebug_device_create_zones(devip)) {
4923 kfree(devip);
4924 return NULL;
4925 }
4926 } else {
4927 devip->zmodel = BLK_ZONED_NONE;
4928 }
4929 devip->sdbg_host = sdbg_host;
4930 devip->create_ts = ktime_get_boottime();
4931 atomic_set(&devip->stopped, (sdeb_tur_ms_to_ready > 0 ? 2 : 0));
4932 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
4933 }
4934 return devip;
4935}
4936
4937static struct sdebug_dev_info *find_build_dev_info(struct scsi_device *sdev)
4938{
4939 struct sdebug_host_info *sdbg_host;
4940 struct sdebug_dev_info *open_devip = NULL;
4941 struct sdebug_dev_info *devip;
4942
4943 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
4944 if (!sdbg_host) {
4945 pr_err("Host info NULL\n");
4946 return NULL;
4947 }
4948
4949 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
4950 if ((devip->used) && (devip->channel == sdev->channel) &&
4951 (devip->target == sdev->id) &&
4952 (devip->lun == sdev->lun))
4953 return devip;
4954 else {
4955 if ((!devip->used) && (!open_devip))
4956 open_devip = devip;
4957 }
4958 }
4959 if (!open_devip) { /* try and make a new one */
4960 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
4961 if (!open_devip) {
4962 pr_err("out of memory at line %d\n", __LINE__);
4963 return NULL;
4964 }
4965 }
4966
4967 open_devip->channel = sdev->channel;
4968 open_devip->target = sdev->id;
4969 open_devip->lun = sdev->lun;
4970 open_devip->sdbg_host = sdbg_host;
4971 atomic_set(&open_devip->num_in_q, 0);
4972 set_bit(SDEBUG_UA_POR, open_devip->uas_bm);
4973 open_devip->used = true;
4974 return open_devip;
4975}
4976
4977static int scsi_debug_slave_alloc(struct scsi_device *sdp)
4978{
4979 if (sdebug_verbose)
4980 pr_info("slave_alloc <%u %u %u %llu>\n",
4981 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
4982 return 0;
4983}
4984
4985static int scsi_debug_slave_configure(struct scsi_device *sdp)
4986{
4987 struct sdebug_dev_info *devip =
4988 (struct sdebug_dev_info *)sdp->hostdata;
4989
4990 if (sdebug_verbose)
4991 pr_info("slave_configure <%u %u %u %llu>\n",
4992 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
4993 if (sdp->host->max_cmd_len != SDEBUG_MAX_CMD_LEN)
4994 sdp->host->max_cmd_len = SDEBUG_MAX_CMD_LEN;
4995 if (devip == NULL) {
4996 devip = find_build_dev_info(sdp);
4997 if (devip == NULL)
4998 return 1; /* no resources, will be marked offline */
4999 }
5000 sdp->hostdata = devip;
5001 if (sdebug_no_uld)
5002 sdp->no_uld_attach = 1;
5003 config_cdb_len(sdp);
5004 return 0;
5005}
5006
5007static void scsi_debug_slave_destroy(struct scsi_device *sdp)
5008{
5009 struct sdebug_dev_info *devip =
5010 (struct sdebug_dev_info *)sdp->hostdata;
5011
5012 if (sdebug_verbose)
5013 pr_info("slave_destroy <%u %u %u %llu>\n",
5014 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
5015 if (devip) {
5016 /* make this slot available for re-use */
5017 devip->used = false;
5018 sdp->hostdata = NULL;
5019 }
5020}
5021
5022static void stop_qc_helper(struct sdebug_defer *sd_dp,
5023 enum sdeb_defer_type defer_t)
5024{
5025 if (!sd_dp)
5026 return;
5027 if (defer_t == SDEB_DEFER_HRT)
5028 hrtimer_cancel(&sd_dp->hrt);
5029 else if (defer_t == SDEB_DEFER_WQ)
5030 cancel_work_sync(&sd_dp->ew.work);
5031}
5032
5033/* If @cmnd found deletes its timer or work queue and returns true; else
5034 returns false */
5035static bool stop_queued_cmnd(struct scsi_cmnd *cmnd)
5036{
5037 unsigned long iflags;
5038 int j, k, qmax, r_qmax;
5039 enum sdeb_defer_type l_defer_t;
5040 struct sdebug_queue *sqp;
5041 struct sdebug_queued_cmd *sqcp;
5042 struct sdebug_dev_info *devip;
5043 struct sdebug_defer *sd_dp;
5044
5045 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
5046 spin_lock_irqsave(&sqp->qc_lock, iflags);
5047 qmax = sdebug_max_queue;
5048 r_qmax = atomic_read(&retired_max_queue);
5049 if (r_qmax > qmax)
5050 qmax = r_qmax;
5051 for (k = 0; k < qmax; ++k) {
5052 if (test_bit(k, sqp->in_use_bm)) {
5053 sqcp = &sqp->qc_arr[k];
5054 if (cmnd != sqcp->a_cmnd)
5055 continue;
5056 /* found */
5057 devip = (struct sdebug_dev_info *)
5058 cmnd->device->hostdata;
5059 if (devip)
5060 atomic_dec(&devip->num_in_q);
5061 sqcp->a_cmnd = NULL;
5062 sd_dp = sqcp->sd_dp;
5063 if (sd_dp) {
5064 l_defer_t = sd_dp->defer_t;
5065 sd_dp->defer_t = SDEB_DEFER_NONE;
5066 } else
5067 l_defer_t = SDEB_DEFER_NONE;
5068 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5069 stop_qc_helper(sd_dp, l_defer_t);
5070 clear_bit(k, sqp->in_use_bm);
5071 return true;
5072 }
5073 }
5074 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5075 }
5076 return false;
5077}
5078
5079/* Deletes (stops) timers or work queues of all queued commands */
5080static void stop_all_queued(void)
5081{
5082 unsigned long iflags;
5083 int j, k;
5084 enum sdeb_defer_type l_defer_t;
5085 struct sdebug_queue *sqp;
5086 struct sdebug_queued_cmd *sqcp;
5087 struct sdebug_dev_info *devip;
5088 struct sdebug_defer *sd_dp;
5089
5090 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
5091 spin_lock_irqsave(&sqp->qc_lock, iflags);
5092 for (k = 0; k < SDEBUG_CANQUEUE; ++k) {
5093 if (test_bit(k, sqp->in_use_bm)) {
5094 sqcp = &sqp->qc_arr[k];
5095 if (sqcp->a_cmnd == NULL)
5096 continue;
5097 devip = (struct sdebug_dev_info *)
5098 sqcp->a_cmnd->device->hostdata;
5099 if (devip)
5100 atomic_dec(&devip->num_in_q);
5101 sqcp->a_cmnd = NULL;
5102 sd_dp = sqcp->sd_dp;
5103 if (sd_dp) {
5104 l_defer_t = sd_dp->defer_t;
5105 sd_dp->defer_t = SDEB_DEFER_NONE;
5106 } else
5107 l_defer_t = SDEB_DEFER_NONE;
5108 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5109 stop_qc_helper(sd_dp, l_defer_t);
5110 clear_bit(k, sqp->in_use_bm);
5111 spin_lock_irqsave(&sqp->qc_lock, iflags);
5112 }
5113 }
5114 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5115 }
5116}
5117
5118/* Free queued command memory on heap */
5119static void free_all_queued(void)
5120{
5121 int j, k;
5122 struct sdebug_queue *sqp;
5123 struct sdebug_queued_cmd *sqcp;
5124
5125 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
5126 for (k = 0; k < SDEBUG_CANQUEUE; ++k) {
5127 sqcp = &sqp->qc_arr[k];
5128 kfree(sqcp->sd_dp);
5129 sqcp->sd_dp = NULL;
5130 }
5131 }
5132}
5133
5134static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
5135{
5136 bool ok;
5137
5138 ++num_aborts;
5139 if (SCpnt) {
5140 ok = stop_queued_cmnd(SCpnt);
5141 if (SCpnt->device && (SDEBUG_OPT_ALL_NOISE & sdebug_opts))
5142 sdev_printk(KERN_INFO, SCpnt->device,
5143 "%s: command%s found\n", __func__,
5144 ok ? "" : " not");
5145 }
5146 return SUCCESS;
5147}
5148
5149static int scsi_debug_device_reset(struct scsi_cmnd *SCpnt)
5150{
5151 ++num_dev_resets;
5152 if (SCpnt && SCpnt->device) {
5153 struct scsi_device *sdp = SCpnt->device;
5154 struct sdebug_dev_info *devip =
5155 (struct sdebug_dev_info *)sdp->hostdata;
5156
5157 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5158 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
5159 if (devip)
5160 set_bit(SDEBUG_UA_POR, devip->uas_bm);
5161 }
5162 return SUCCESS;
5163}
5164
5165static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
5166{
5167 struct sdebug_host_info *sdbg_host;
5168 struct sdebug_dev_info *devip;
5169 struct scsi_device *sdp;
5170 struct Scsi_Host *hp;
5171 int k = 0;
5172
5173 ++num_target_resets;
5174 if (!SCpnt)
5175 goto lie;
5176 sdp = SCpnt->device;
5177 if (!sdp)
5178 goto lie;
5179 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5180 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
5181 hp = sdp->host;
5182 if (!hp)
5183 goto lie;
5184 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
5185 if (sdbg_host) {
5186 list_for_each_entry(devip,
5187 &sdbg_host->dev_info_list,
5188 dev_list)
5189 if (devip->target == sdp->id) {
5190 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
5191 ++k;
5192 }
5193 }
5194 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
5195 sdev_printk(KERN_INFO, sdp,
5196 "%s: %d device(s) found in target\n", __func__, k);
5197lie:
5198 return SUCCESS;
5199}
5200
5201static int scsi_debug_bus_reset(struct scsi_cmnd *SCpnt)
5202{
5203 struct sdebug_host_info *sdbg_host;
5204 struct sdebug_dev_info *devip;
5205 struct scsi_device *sdp;
5206 struct Scsi_Host *hp;
5207 int k = 0;
5208
5209 ++num_bus_resets;
5210 if (!(SCpnt && SCpnt->device))
5211 goto lie;
5212 sdp = SCpnt->device;
5213 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5214 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
5215 hp = sdp->host;
5216 if (hp) {
5217 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
5218 if (sdbg_host) {
5219 list_for_each_entry(devip,
5220 &sdbg_host->dev_info_list,
5221 dev_list) {
5222 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
5223 ++k;
5224 }
5225 }
5226 }
5227 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
5228 sdev_printk(KERN_INFO, sdp,
5229 "%s: %d device(s) found in host\n", __func__, k);
5230lie:
5231 return SUCCESS;
5232}
5233
5234static int scsi_debug_host_reset(struct scsi_cmnd *SCpnt)
5235{
5236 struct sdebug_host_info *sdbg_host;
5237 struct sdebug_dev_info *devip;
5238 int k = 0;
5239
5240 ++num_host_resets;
5241 if ((SCpnt->device) && (SDEBUG_OPT_ALL_NOISE & sdebug_opts))
5242 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
5243 spin_lock(&sdebug_host_list_lock);
5244 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
5245 list_for_each_entry(devip, &sdbg_host->dev_info_list,
5246 dev_list) {
5247 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
5248 ++k;
5249 }
5250 }
5251 spin_unlock(&sdebug_host_list_lock);
5252 stop_all_queued();
5253 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
5254 sdev_printk(KERN_INFO, SCpnt->device,
5255 "%s: %d device(s) found\n", __func__, k);
5256 return SUCCESS;
5257}
5258
5259static void sdebug_build_parts(unsigned char *ramp, unsigned long store_size)
5260{
5261 struct msdos_partition *pp;
5262 int starts[SDEBUG_MAX_PARTS + 2], max_part_secs;
5263 int sectors_per_part, num_sectors, k;
5264 int heads_by_sects, start_sec, end_sec;
5265
5266 /* assume partition table already zeroed */
5267 if ((sdebug_num_parts < 1) || (store_size < 1048576))
5268 return;
5269 if (sdebug_num_parts > SDEBUG_MAX_PARTS) {
5270 sdebug_num_parts = SDEBUG_MAX_PARTS;
5271 pr_warn("reducing partitions to %d\n", SDEBUG_MAX_PARTS);
5272 }
5273 num_sectors = (int)get_sdebug_capacity();
5274 sectors_per_part = (num_sectors - sdebug_sectors_per)
5275 / sdebug_num_parts;
5276 heads_by_sects = sdebug_heads * sdebug_sectors_per;
5277 starts[0] = sdebug_sectors_per;
5278 max_part_secs = sectors_per_part;
5279 for (k = 1; k < sdebug_num_parts; ++k) {
5280 starts[k] = ((k * sectors_per_part) / heads_by_sects)
5281 * heads_by_sects;
5282 if (starts[k] - starts[k - 1] < max_part_secs)
5283 max_part_secs = starts[k] - starts[k - 1];
5284 }
5285 starts[sdebug_num_parts] = num_sectors;
5286 starts[sdebug_num_parts + 1] = 0;
5287
5288 ramp[510] = 0x55; /* magic partition markings */
5289 ramp[511] = 0xAA;
5290 pp = (struct msdos_partition *)(ramp + 0x1be);
5291 for (k = 0; starts[k + 1]; ++k, ++pp) {
5292 start_sec = starts[k];
5293 end_sec = starts[k] + max_part_secs - 1;
5294 pp->boot_ind = 0;
5295
5296 pp->cyl = start_sec / heads_by_sects;
5297 pp->head = (start_sec - (pp->cyl * heads_by_sects))
5298 / sdebug_sectors_per;
5299 pp->sector = (start_sec % sdebug_sectors_per) + 1;
5300
5301 pp->end_cyl = end_sec / heads_by_sects;
5302 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
5303 / sdebug_sectors_per;
5304 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
5305
5306 pp->start_sect = cpu_to_le32(start_sec);
5307 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
5308 pp->sys_ind = 0x83; /* plain Linux partition */
5309 }
5310}
5311
5312static void block_unblock_all_queues(bool block)
5313{
5314 int j;
5315 struct sdebug_queue *sqp;
5316
5317 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp)
5318 atomic_set(&sqp->blocked, (int)block);
5319}
5320
5321/* Adjust (by rounding down) the sdebug_cmnd_count so abs(every_nth)-1
5322 * commands will be processed normally before triggers occur.
5323 */
5324static void tweak_cmnd_count(void)
5325{
5326 int count, modulo;
5327
5328 modulo = abs(sdebug_every_nth);
5329 if (modulo < 2)
5330 return;
5331 block_unblock_all_queues(true);
5332 count = atomic_read(&sdebug_cmnd_count);
5333 atomic_set(&sdebug_cmnd_count, (count / modulo) * modulo);
5334 block_unblock_all_queues(false);
5335}
5336
5337static void clear_queue_stats(void)
5338{
5339 atomic_set(&sdebug_cmnd_count, 0);
5340 atomic_set(&sdebug_completions, 0);
5341 atomic_set(&sdebug_miss_cpus, 0);
5342 atomic_set(&sdebug_a_tsf, 0);
5343}
5344
5345static bool inject_on_this_cmd(void)
5346{
5347 if (sdebug_every_nth == 0)
5348 return false;
5349 return (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth)) == 0;
5350}
5351
5352#define INCLUSIVE_TIMING_MAX_NS 1000000 /* 1 millisecond */
5353
5354/* Complete the processing of the thread that queued a SCSI command to this
5355 * driver. It either completes the command by calling cmnd_done() or
5356 * schedules a hr timer or work queue then returns 0. Returns
5357 * SCSI_MLQUEUE_HOST_BUSY if temporarily out of resources.
5358 */
5359static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
5360 int scsi_result,
5361 int (*pfp)(struct scsi_cmnd *,
5362 struct sdebug_dev_info *),
5363 int delta_jiff, int ndelay)
5364{
5365 bool new_sd_dp;
5366 bool inject = false;
5367 bool hipri = (cmnd->request->cmd_flags & REQ_HIPRI);
5368 int k, num_in_q, qdepth;
5369 unsigned long iflags;
5370 u64 ns_from_boot = 0;
5371 struct sdebug_queue *sqp;
5372 struct sdebug_queued_cmd *sqcp;
5373 struct scsi_device *sdp;
5374 struct sdebug_defer *sd_dp;
5375
5376 if (unlikely(devip == NULL)) {
5377 if (scsi_result == 0)
5378 scsi_result = DID_NO_CONNECT << 16;
5379 goto respond_in_thread;
5380 }
5381 sdp = cmnd->device;
5382
5383 if (delta_jiff == 0)
5384 goto respond_in_thread;
5385
5386 sqp = get_queue(cmnd);
5387 spin_lock_irqsave(&sqp->qc_lock, iflags);
5388 if (unlikely(atomic_read(&sqp->blocked))) {
5389 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5390 return SCSI_MLQUEUE_HOST_BUSY;
5391 }
5392 num_in_q = atomic_read(&devip->num_in_q);
5393 qdepth = cmnd->device->queue_depth;
5394 if (unlikely((qdepth > 0) && (num_in_q >= qdepth))) {
5395 if (scsi_result) {
5396 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5397 goto respond_in_thread;
5398 } else
5399 scsi_result = device_qfull_result;
5400 } else if (unlikely(sdebug_every_nth &&
5401 (SDEBUG_OPT_RARE_TSF & sdebug_opts) &&
5402 (scsi_result == 0))) {
5403 if ((num_in_q == (qdepth - 1)) &&
5404 (atomic_inc_return(&sdebug_a_tsf) >=
5405 abs(sdebug_every_nth))) {
5406 atomic_set(&sdebug_a_tsf, 0);
5407 inject = true;
5408 scsi_result = device_qfull_result;
5409 }
5410 }
5411
5412 k = find_first_zero_bit(sqp->in_use_bm, sdebug_max_queue);
5413 if (unlikely(k >= sdebug_max_queue)) {
5414 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5415 if (scsi_result)
5416 goto respond_in_thread;
5417 else if (SDEBUG_OPT_ALL_TSF & sdebug_opts)
5418 scsi_result = device_qfull_result;
5419 if (SDEBUG_OPT_Q_NOISE & sdebug_opts)
5420 sdev_printk(KERN_INFO, sdp,
5421 "%s: max_queue=%d exceeded, %s\n",
5422 __func__, sdebug_max_queue,
5423 (scsi_result ? "status: TASK SET FULL" :
5424 "report: host busy"));
5425 if (scsi_result)
5426 goto respond_in_thread;
5427 else
5428 return SCSI_MLQUEUE_HOST_BUSY;
5429 }
5430 set_bit(k, sqp->in_use_bm);
5431 atomic_inc(&devip->num_in_q);
5432 sqcp = &sqp->qc_arr[k];
5433 sqcp->a_cmnd = cmnd;
5434 cmnd->host_scribble = (unsigned char *)sqcp;
5435 sd_dp = sqcp->sd_dp;
5436 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5437
5438 if (!sd_dp) {
5439 sd_dp = kzalloc(sizeof(*sd_dp), GFP_ATOMIC);
5440 if (!sd_dp) {
5441 atomic_dec(&devip->num_in_q);
5442 clear_bit(k, sqp->in_use_bm);
5443 return SCSI_MLQUEUE_HOST_BUSY;
5444 }
5445 new_sd_dp = true;
5446 } else {
5447 new_sd_dp = false;
5448 }
5449
5450 /* Set the hostwide tag */
5451 if (sdebug_host_max_queue)
5452 sd_dp->hc_idx = get_tag(cmnd);
5453
5454 if (hipri)
5455 ns_from_boot = ktime_get_boottime_ns();
5456
5457 /* one of the resp_*() response functions is called here */
5458 cmnd->result = pfp ? pfp(cmnd, devip) : 0;
5459 if (cmnd->result & SDEG_RES_IMMED_MASK) {
5460 cmnd->result &= ~SDEG_RES_IMMED_MASK;
5461 delta_jiff = ndelay = 0;
5462 }
5463 if (cmnd->result == 0 && scsi_result != 0)
5464 cmnd->result = scsi_result;
5465 if (cmnd->result == 0 && unlikely(sdebug_opts & SDEBUG_OPT_TRANSPORT_ERR)) {
5466 if (atomic_read(&sdeb_inject_pending)) {
5467 mk_sense_buffer(cmnd, ABORTED_COMMAND, TRANSPORT_PROBLEM, ACK_NAK_TO);
5468 atomic_set(&sdeb_inject_pending, 0);
5469 cmnd->result = check_condition_result;
5470 }
5471 }
5472
5473 if (unlikely(sdebug_verbose && cmnd->result))
5474 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
5475 __func__, cmnd->result);
5476
5477 if (delta_jiff > 0 || ndelay > 0) {
5478 ktime_t kt;
5479
5480 if (delta_jiff > 0) {
5481 u64 ns = jiffies_to_nsecs(delta_jiff);
5482
5483 if (sdebug_random && ns < U32_MAX) {
5484 ns = prandom_u32_max((u32)ns);
5485 } else if (sdebug_random) {
5486 ns >>= 12; /* scale to 4 usec precision */
5487 if (ns < U32_MAX) /* over 4 hours max */
5488 ns = prandom_u32_max((u32)ns);
5489 ns <<= 12;
5490 }
5491 kt = ns_to_ktime(ns);
5492 } else { /* ndelay has a 4.2 second max */
5493 kt = sdebug_random ? prandom_u32_max((u32)ndelay) :
5494 (u32)ndelay;
5495 if (ndelay < INCLUSIVE_TIMING_MAX_NS) {
5496 u64 d = ktime_get_boottime_ns() - ns_from_boot;
5497
5498 if (kt <= d) { /* elapsed duration >= kt */
5499 spin_lock_irqsave(&sqp->qc_lock, iflags);
5500 sqcp->a_cmnd = NULL;
5501 atomic_dec(&devip->num_in_q);
5502 clear_bit(k, sqp->in_use_bm);
5503 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5504 if (new_sd_dp)
5505 kfree(sd_dp);
5506 /* call scsi_done() from this thread */
5507 cmnd->scsi_done(cmnd);
5508 return 0;
5509 }
5510 /* otherwise reduce kt by elapsed time */
5511 kt -= d;
5512 }
5513 }
5514 if (hipri) {
5515 sd_dp->cmpl_ts = ktime_add(ns_to_ktime(ns_from_boot), kt);
5516 spin_lock_irqsave(&sqp->qc_lock, iflags);
5517 if (!sd_dp->init_poll) {
5518 sd_dp->init_poll = true;
5519 sqcp->sd_dp = sd_dp;
5520 sd_dp->sqa_idx = sqp - sdebug_q_arr;
5521 sd_dp->qc_idx = k;
5522 }
5523 sd_dp->defer_t = SDEB_DEFER_POLL;
5524 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5525 } else {
5526 if (!sd_dp->init_hrt) {
5527 sd_dp->init_hrt = true;
5528 sqcp->sd_dp = sd_dp;
5529 hrtimer_init(&sd_dp->hrt, CLOCK_MONOTONIC,
5530 HRTIMER_MODE_REL_PINNED);
5531 sd_dp->hrt.function = sdebug_q_cmd_hrt_complete;
5532 sd_dp->sqa_idx = sqp - sdebug_q_arr;
5533 sd_dp->qc_idx = k;
5534 }
5535 sd_dp->defer_t = SDEB_DEFER_HRT;
5536 /* schedule the invocation of scsi_done() for a later time */
5537 hrtimer_start(&sd_dp->hrt, kt, HRTIMER_MODE_REL_PINNED);
5538 }
5539 if (sdebug_statistics)
5540 sd_dp->issuing_cpu = raw_smp_processor_id();
5541 } else { /* jdelay < 0, use work queue */
5542 if (unlikely((sdebug_opts & SDEBUG_OPT_CMD_ABORT) &&
5543 atomic_read(&sdeb_inject_pending)))
5544 sd_dp->aborted = true;
5545 if (hipri) {
5546 sd_dp->cmpl_ts = ns_to_ktime(ns_from_boot);
5547 spin_lock_irqsave(&sqp->qc_lock, iflags);
5548 if (!sd_dp->init_poll) {
5549 sd_dp->init_poll = true;
5550 sqcp->sd_dp = sd_dp;
5551 sd_dp->sqa_idx = sqp - sdebug_q_arr;
5552 sd_dp->qc_idx = k;
5553 }
5554 sd_dp->defer_t = SDEB_DEFER_POLL;
5555 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5556 } else {
5557 if (!sd_dp->init_wq) {
5558 sd_dp->init_wq = true;
5559 sqcp->sd_dp = sd_dp;
5560 sd_dp->sqa_idx = sqp - sdebug_q_arr;
5561 sd_dp->qc_idx = k;
5562 INIT_WORK(&sd_dp->ew.work, sdebug_q_cmd_wq_complete);
5563 }
5564 sd_dp->defer_t = SDEB_DEFER_WQ;
5565 schedule_work(&sd_dp->ew.work);
5566 }
5567 if (sdebug_statistics)
5568 sd_dp->issuing_cpu = raw_smp_processor_id();
5569 if (unlikely(sd_dp->aborted)) {
5570 sdev_printk(KERN_INFO, sdp, "abort request tag %d\n", cmnd->request->tag);
5571 blk_abort_request(cmnd->request);
5572 atomic_set(&sdeb_inject_pending, 0);
5573 sd_dp->aborted = false;
5574 }
5575 }
5576 if (unlikely((SDEBUG_OPT_Q_NOISE & sdebug_opts) && scsi_result == device_qfull_result))
5577 sdev_printk(KERN_INFO, sdp, "%s: num_in_q=%d +1, %s%s\n", __func__,
5578 num_in_q, (inject ? "<inject> " : ""), "status: TASK SET FULL");
5579 return 0;
5580
5581respond_in_thread: /* call back to mid-layer using invocation thread */
5582 cmnd->result = pfp != NULL ? pfp(cmnd, devip) : 0;
5583 cmnd->result &= ~SDEG_RES_IMMED_MASK;
5584 if (cmnd->result == 0 && scsi_result != 0)
5585 cmnd->result = scsi_result;
5586 cmnd->scsi_done(cmnd);
5587 return 0;
5588}
5589
5590/* Note: The following macros create attribute files in the
5591 /sys/module/scsi_debug/parameters directory. Unfortunately this
5592 driver is unaware of a change and cannot trigger auxiliary actions
5593 as it can when the corresponding attribute in the
5594 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
5595 */
5596module_param_named(add_host, sdebug_add_host, int, S_IRUGO | S_IWUSR);
5597module_param_named(ato, sdebug_ato, int, S_IRUGO);
5598module_param_named(cdb_len, sdebug_cdb_len, int, 0644);
5599module_param_named(clustering, sdebug_clustering, bool, S_IRUGO | S_IWUSR);
5600module_param_named(delay, sdebug_jdelay, int, S_IRUGO | S_IWUSR);
5601module_param_named(dev_size_mb, sdebug_dev_size_mb, int, S_IRUGO);
5602module_param_named(dif, sdebug_dif, int, S_IRUGO);
5603module_param_named(dix, sdebug_dix, int, S_IRUGO);
5604module_param_named(dsense, sdebug_dsense, int, S_IRUGO | S_IWUSR);
5605module_param_named(every_nth, sdebug_every_nth, int, S_IRUGO | S_IWUSR);
5606module_param_named(fake_rw, sdebug_fake_rw, int, S_IRUGO | S_IWUSR);
5607module_param_named(guard, sdebug_guard, uint, S_IRUGO);
5608module_param_named(host_lock, sdebug_host_lock, bool, S_IRUGO | S_IWUSR);
5609module_param_named(host_max_queue, sdebug_host_max_queue, int, S_IRUGO);
5610module_param_string(inq_product, sdebug_inq_product_id,
5611 sizeof(sdebug_inq_product_id), S_IRUGO | S_IWUSR);
5612module_param_string(inq_rev, sdebug_inq_product_rev,
5613 sizeof(sdebug_inq_product_rev), S_IRUGO | S_IWUSR);
5614module_param_string(inq_vendor, sdebug_inq_vendor_id,
5615 sizeof(sdebug_inq_vendor_id), S_IRUGO | S_IWUSR);
5616module_param_named(lbprz, sdebug_lbprz, int, S_IRUGO);
5617module_param_named(lbpu, sdebug_lbpu, int, S_IRUGO);
5618module_param_named(lbpws, sdebug_lbpws, int, S_IRUGO);
5619module_param_named(lbpws10, sdebug_lbpws10, int, S_IRUGO);
5620module_param_named(lowest_aligned, sdebug_lowest_aligned, int, S_IRUGO);
5621module_param_named(lun_format, sdebug_lun_am_i, int, S_IRUGO | S_IWUSR);
5622module_param_named(max_luns, sdebug_max_luns, int, S_IRUGO | S_IWUSR);
5623module_param_named(max_queue, sdebug_max_queue, int, S_IRUGO | S_IWUSR);
5624module_param_named(medium_error_count, sdebug_medium_error_count, int,
5625 S_IRUGO | S_IWUSR);
5626module_param_named(medium_error_start, sdebug_medium_error_start, int,
5627 S_IRUGO | S_IWUSR);
5628module_param_named(ndelay, sdebug_ndelay, int, S_IRUGO | S_IWUSR);
5629module_param_named(no_lun_0, sdebug_no_lun_0, int, S_IRUGO | S_IWUSR);
5630module_param_named(no_uld, sdebug_no_uld, int, S_IRUGO);
5631module_param_named(num_parts, sdebug_num_parts, int, S_IRUGO);
5632module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR);
5633module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO);
5634module_param_named(opt_xferlen_exp, sdebug_opt_xferlen_exp, int, S_IRUGO);
5635module_param_named(opts, sdebug_opts, int, S_IRUGO | S_IWUSR);
5636module_param_named(per_host_store, sdebug_per_host_store, bool,
5637 S_IRUGO | S_IWUSR);
5638module_param_named(physblk_exp, sdebug_physblk_exp, int, S_IRUGO);
5639module_param_named(ptype, sdebug_ptype, int, S_IRUGO | S_IWUSR);
5640module_param_named(random, sdebug_random, bool, S_IRUGO | S_IWUSR);
5641module_param_named(removable, sdebug_removable, bool, S_IRUGO | S_IWUSR);
5642module_param_named(scsi_level, sdebug_scsi_level, int, S_IRUGO);
5643module_param_named(sector_size, sdebug_sector_size, int, S_IRUGO);
5644module_param_named(statistics, sdebug_statistics, bool, S_IRUGO | S_IWUSR);
5645module_param_named(strict, sdebug_strict, bool, S_IRUGO | S_IWUSR);
5646module_param_named(submit_queues, submit_queues, int, S_IRUGO);
5647module_param_named(poll_queues, poll_queues, int, S_IRUGO);
5648module_param_named(tur_ms_to_ready, sdeb_tur_ms_to_ready, int, S_IRUGO);
5649module_param_named(unmap_alignment, sdebug_unmap_alignment, int, S_IRUGO);
5650module_param_named(unmap_granularity, sdebug_unmap_granularity, int, S_IRUGO);
5651module_param_named(unmap_max_blocks, sdebug_unmap_max_blocks, int, S_IRUGO);
5652module_param_named(unmap_max_desc, sdebug_unmap_max_desc, int, S_IRUGO);
5653module_param_named(uuid_ctl, sdebug_uuid_ctl, int, S_IRUGO);
5654module_param_named(virtual_gb, sdebug_virtual_gb, int, S_IRUGO | S_IWUSR);
5655module_param_named(vpd_use_hostno, sdebug_vpd_use_hostno, int,
5656 S_IRUGO | S_IWUSR);
5657module_param_named(wp, sdebug_wp, bool, S_IRUGO | S_IWUSR);
5658module_param_named(write_same_length, sdebug_write_same_length, int,
5659 S_IRUGO | S_IWUSR);
5660module_param_named(zbc, sdeb_zbc_model_s, charp, S_IRUGO);
5661module_param_named(zone_max_open, sdeb_zbc_max_open, int, S_IRUGO);
5662module_param_named(zone_nr_conv, sdeb_zbc_nr_conv, int, S_IRUGO);
5663module_param_named(zone_size_mb, sdeb_zbc_zone_size_mb, int, S_IRUGO);
5664
5665MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
5666MODULE_DESCRIPTION("SCSI debug adapter driver");
5667MODULE_LICENSE("GPL");
5668MODULE_VERSION(SDEBUG_VERSION);
5669
5670MODULE_PARM_DESC(add_host, "add n hosts, in sysfs if negative remove host(s) (def=1)");
5671MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
5672MODULE_PARM_DESC(cdb_len, "suggest CDB lengths to drivers (def=10)");
5673MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
5674MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
5675MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)");
5676MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
5677MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
5678MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
5679MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
5680MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
5681MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
5682MODULE_PARM_DESC(host_lock, "host_lock is ignored (def=0)");
5683MODULE_PARM_DESC(host_max_queue,
5684 "host max # of queued cmds (0 to max(def) [max_queue fixed equal for !0])");
5685MODULE_PARM_DESC(inq_product, "SCSI INQUIRY product string (def=\"scsi_debug\")");
5686MODULE_PARM_DESC(inq_rev, "SCSI INQUIRY revision string (def=\""
5687 SDEBUG_VERSION "\")");
5688MODULE_PARM_DESC(inq_vendor, "SCSI INQUIRY vendor string (def=\"Linux\")");
5689MODULE_PARM_DESC(lbprz,
5690 "on read unmapped LBs return 0 when 1 (def), return 0xff when 2");
5691MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
5692MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
5693MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
5694MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
5695MODULE_PARM_DESC(lun_format, "LUN format: 0->peripheral (def); 1 --> flat address method");
5696MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
5697MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
5698MODULE_PARM_DESC(medium_error_count, "count of sectors to return follow on MEDIUM error");
5699MODULE_PARM_DESC(medium_error_start, "starting sector number to return MEDIUM error");
5700MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
5701MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
5702MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
5703MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
5704MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
5705MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)");
5706MODULE_PARM_DESC(opt_xferlen_exp, "optimal transfer length granularity exponent (def=physblk_exp)");
5707MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
5708MODULE_PARM_DESC(per_host_store, "If set, next positive add_host will get new store (def=0)");
5709MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
5710MODULE_PARM_DESC(poll_queues, "support for iouring iopoll queues (1 to max(submit_queues - 1))");
5711MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
5712MODULE_PARM_DESC(random, "If set, uniformly randomize command duration between 0 and delay_in_ns");
5713MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
5714MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=7[SPC-5])");
5715MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
5716MODULE_PARM_DESC(statistics, "collect statistics on commands, queues (def=0)");
5717MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)");
5718MODULE_PARM_DESC(submit_queues, "support for block multi-queue (def=1)");
5719MODULE_PARM_DESC(tur_ms_to_ready, "TEST UNIT READY millisecs before initial good status (def=0)");
5720MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
5721MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
5722MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
5723MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
5724MODULE_PARM_DESC(uuid_ctl,
5725 "1->use uuid for lu name, 0->don't, 2->all use same (def=0)");
5726MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)");
5727MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
5728MODULE_PARM_DESC(wp, "Write Protect (def=0)");
5729MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
5730MODULE_PARM_DESC(zbc, "'none' [0]; 'aware' [1]; 'managed' [2] (def=0). Can have 'host-' prefix");
5731MODULE_PARM_DESC(zone_max_open, "Maximum number of open zones; [0] for no limit (def=auto)");
5732MODULE_PARM_DESC(zone_nr_conv, "Number of conventional zones (def=1)");
5733MODULE_PARM_DESC(zone_size_mb, "Zone size in MiB (def=auto)");
5734
5735#define SDEBUG_INFO_LEN 256
5736static char sdebug_info[SDEBUG_INFO_LEN];
5737
5738static const char *scsi_debug_info(struct Scsi_Host *shp)
5739{
5740 int k;
5741
5742 k = scnprintf(sdebug_info, SDEBUG_INFO_LEN, "%s: version %s [%s]\n",
5743 my_name, SDEBUG_VERSION, sdebug_version_date);
5744 if (k >= (SDEBUG_INFO_LEN - 1))
5745 return sdebug_info;
5746 scnprintf(sdebug_info + k, SDEBUG_INFO_LEN - k,
5747 " dev_size_mb=%d, opts=0x%x, submit_queues=%d, %s=%d",
5748 sdebug_dev_size_mb, sdebug_opts, submit_queues,
5749 "statistics", (int)sdebug_statistics);
5750 return sdebug_info;
5751}
5752
5753/* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */
5754static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer,
5755 int length)
5756{
5757 char arr[16];
5758 int opts;
5759 int minLen = length > 15 ? 15 : length;
5760
5761 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
5762 return -EACCES;
5763 memcpy(arr, buffer, minLen);
5764 arr[minLen] = '\0';
5765 if (1 != sscanf(arr, "%d", &opts))
5766 return -EINVAL;
5767 sdebug_opts = opts;
5768 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
5769 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
5770 if (sdebug_every_nth != 0)
5771 tweak_cmnd_count();
5772 return length;
5773}
5774
5775/* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the
5776 * same for each scsi_debug host (if more than one). Some of the counters
5777 * output are not atomics so might be inaccurate in a busy system. */
5778static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
5779{
5780 int f, j, l;
5781 struct sdebug_queue *sqp;
5782 struct sdebug_host_info *sdhp;
5783
5784 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n",
5785 SDEBUG_VERSION, sdebug_version_date);
5786 seq_printf(m, "num_tgts=%d, %ssize=%d MB, opts=0x%x, every_nth=%d\n",
5787 sdebug_num_tgts, "shared (ram) ", sdebug_dev_size_mb,
5788 sdebug_opts, sdebug_every_nth);
5789 seq_printf(m, "delay=%d, ndelay=%d, max_luns=%d, sector_size=%d %s\n",
5790 sdebug_jdelay, sdebug_ndelay, sdebug_max_luns,
5791 sdebug_sector_size, "bytes");
5792 seq_printf(m, "cylinders=%d, heads=%d, sectors=%d, command aborts=%d\n",
5793 sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per,
5794 num_aborts);
5795 seq_printf(m, "RESETs: device=%d, target=%d, bus=%d, host=%d\n",
5796 num_dev_resets, num_target_resets, num_bus_resets,
5797 num_host_resets);
5798 seq_printf(m, "dix_reads=%d, dix_writes=%d, dif_errors=%d\n",
5799 dix_reads, dix_writes, dif_errors);
5800 seq_printf(m, "usec_in_jiffy=%lu, statistics=%d\n", TICK_NSEC / 1000,
5801 sdebug_statistics);
5802 seq_printf(m, "cmnd_count=%d, completions=%d, %s=%d, a_tsf=%d, mq_polls=%d\n",
5803 atomic_read(&sdebug_cmnd_count),
5804 atomic_read(&sdebug_completions),
5805 "miss_cpus", atomic_read(&sdebug_miss_cpus),
5806 atomic_read(&sdebug_a_tsf),
5807 atomic_read(&sdeb_mq_poll_count));
5808
5809 seq_printf(m, "submit_queues=%d\n", submit_queues);
5810 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
5811 seq_printf(m, " queue %d:\n", j);
5812 f = find_first_bit(sqp->in_use_bm, sdebug_max_queue);
5813 if (f != sdebug_max_queue) {
5814 l = find_last_bit(sqp->in_use_bm, sdebug_max_queue);
5815 seq_printf(m, " in_use_bm BUSY: %s: %d,%d\n",
5816 "first,last bits", f, l);
5817 }
5818 }
5819
5820 seq_printf(m, "this host_no=%d\n", host->host_no);
5821 if (!xa_empty(per_store_ap)) {
5822 bool niu;
5823 int idx;
5824 unsigned long l_idx;
5825 struct sdeb_store_info *sip;
5826
5827 seq_puts(m, "\nhost list:\n");
5828 j = 0;
5829 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
5830 idx = sdhp->si_idx;
5831 seq_printf(m, " %d: host_no=%d, si_idx=%d\n", j,
5832 sdhp->shost->host_no, idx);
5833 ++j;
5834 }
5835 seq_printf(m, "\nper_store array [most_recent_idx=%d]:\n",
5836 sdeb_most_recent_idx);
5837 j = 0;
5838 xa_for_each(per_store_ap, l_idx, sip) {
5839 niu = xa_get_mark(per_store_ap, l_idx,
5840 SDEB_XA_NOT_IN_USE);
5841 idx = (int)l_idx;
5842 seq_printf(m, " %d: idx=%d%s\n", j, idx,
5843 (niu ? " not_in_use" : ""));
5844 ++j;
5845 }
5846 }
5847 return 0;
5848}
5849
5850static ssize_t delay_show(struct device_driver *ddp, char *buf)
5851{
5852 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_jdelay);
5853}
5854/* Returns -EBUSY if jdelay is being changed and commands are queued. The unit
5855 * of delay is jiffies.
5856 */
5857static ssize_t delay_store(struct device_driver *ddp, const char *buf,
5858 size_t count)
5859{
5860 int jdelay, res;
5861
5862 if (count > 0 && sscanf(buf, "%d", &jdelay) == 1) {
5863 res = count;
5864 if (sdebug_jdelay != jdelay) {
5865 int j, k;
5866 struct sdebug_queue *sqp;
5867
5868 block_unblock_all_queues(true);
5869 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
5870 ++j, ++sqp) {
5871 k = find_first_bit(sqp->in_use_bm,
5872 sdebug_max_queue);
5873 if (k != sdebug_max_queue) {
5874 res = -EBUSY; /* queued commands */
5875 break;
5876 }
5877 }
5878 if (res > 0) {
5879 sdebug_jdelay = jdelay;
5880 sdebug_ndelay = 0;
5881 }
5882 block_unblock_all_queues(false);
5883 }
5884 return res;
5885 }
5886 return -EINVAL;
5887}
5888static DRIVER_ATTR_RW(delay);
5889
5890static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
5891{
5892 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ndelay);
5893}
5894/* Returns -EBUSY if ndelay is being changed and commands are queued */
5895/* If > 0 and accepted then sdebug_jdelay is set to JDELAY_OVERRIDDEN */
5896static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
5897 size_t count)
5898{
5899 int ndelay, res;
5900
5901 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
5902 (ndelay >= 0) && (ndelay < (1000 * 1000 * 1000))) {
5903 res = count;
5904 if (sdebug_ndelay != ndelay) {
5905 int j, k;
5906 struct sdebug_queue *sqp;
5907
5908 block_unblock_all_queues(true);
5909 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
5910 ++j, ++sqp) {
5911 k = find_first_bit(sqp->in_use_bm,
5912 sdebug_max_queue);
5913 if (k != sdebug_max_queue) {
5914 res = -EBUSY; /* queued commands */
5915 break;
5916 }
5917 }
5918 if (res > 0) {
5919 sdebug_ndelay = ndelay;
5920 sdebug_jdelay = ndelay ? JDELAY_OVERRIDDEN
5921 : DEF_JDELAY;
5922 }
5923 block_unblock_all_queues(false);
5924 }
5925 return res;
5926 }
5927 return -EINVAL;
5928}
5929static DRIVER_ATTR_RW(ndelay);
5930
5931static ssize_t opts_show(struct device_driver *ddp, char *buf)
5932{
5933 return scnprintf(buf, PAGE_SIZE, "0x%x\n", sdebug_opts);
5934}
5935
5936static ssize_t opts_store(struct device_driver *ddp, const char *buf,
5937 size_t count)
5938{
5939 int opts;
5940 char work[20];
5941
5942 if (sscanf(buf, "%10s", work) == 1) {
5943 if (strncasecmp(work, "0x", 2) == 0) {
5944 if (kstrtoint(work + 2, 16, &opts) == 0)
5945 goto opts_done;
5946 } else {
5947 if (kstrtoint(work, 10, &opts) == 0)
5948 goto opts_done;
5949 }
5950 }
5951 return -EINVAL;
5952opts_done:
5953 sdebug_opts = opts;
5954 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
5955 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
5956 tweak_cmnd_count();
5957 return count;
5958}
5959static DRIVER_ATTR_RW(opts);
5960
5961static ssize_t ptype_show(struct device_driver *ddp, char *buf)
5962{
5963 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ptype);
5964}
5965static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
5966 size_t count)
5967{
5968 int n;
5969
5970 /* Cannot change from or to TYPE_ZBC with sysfs */
5971 if (sdebug_ptype == TYPE_ZBC)
5972 return -EINVAL;
5973
5974 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
5975 if (n == TYPE_ZBC)
5976 return -EINVAL;
5977 sdebug_ptype = n;
5978 return count;
5979 }
5980 return -EINVAL;
5981}
5982static DRIVER_ATTR_RW(ptype);
5983
5984static ssize_t dsense_show(struct device_driver *ddp, char *buf)
5985{
5986 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dsense);
5987}
5988static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
5989 size_t count)
5990{
5991 int n;
5992
5993 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
5994 sdebug_dsense = n;
5995 return count;
5996 }
5997 return -EINVAL;
5998}
5999static DRIVER_ATTR_RW(dsense);
6000
6001static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
6002{
6003 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_fake_rw);
6004}
6005static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
6006 size_t count)
6007{
6008 int n, idx;
6009
6010 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6011 bool want_store = (n == 0);
6012 struct sdebug_host_info *sdhp;
6013
6014 n = (n > 0);
6015 sdebug_fake_rw = (sdebug_fake_rw > 0);
6016 if (sdebug_fake_rw == n)
6017 return count; /* not transitioning so do nothing */
6018
6019 if (want_store) { /* 1 --> 0 transition, set up store */
6020 if (sdeb_first_idx < 0) {
6021 idx = sdebug_add_store();
6022 if (idx < 0)
6023 return idx;
6024 } else {
6025 idx = sdeb_first_idx;
6026 xa_clear_mark(per_store_ap, idx,
6027 SDEB_XA_NOT_IN_USE);
6028 }
6029 /* make all hosts use same store */
6030 list_for_each_entry(sdhp, &sdebug_host_list,
6031 host_list) {
6032 if (sdhp->si_idx != idx) {
6033 xa_set_mark(per_store_ap, sdhp->si_idx,
6034 SDEB_XA_NOT_IN_USE);
6035 sdhp->si_idx = idx;
6036 }
6037 }
6038 sdeb_most_recent_idx = idx;
6039 } else { /* 0 --> 1 transition is trigger for shrink */
6040 sdebug_erase_all_stores(true /* apart from first */);
6041 }
6042 sdebug_fake_rw = n;
6043 return count;
6044 }
6045 return -EINVAL;
6046}
6047static DRIVER_ATTR_RW(fake_rw);
6048
6049static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
6050{
6051 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_lun_0);
6052}
6053static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
6054 size_t count)
6055{
6056 int n;
6057
6058 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6059 sdebug_no_lun_0 = n;
6060 return count;
6061 }
6062 return -EINVAL;
6063}
6064static DRIVER_ATTR_RW(no_lun_0);
6065
6066static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
6067{
6068 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_tgts);
6069}
6070static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
6071 size_t count)
6072{
6073 int n;
6074
6075 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6076 sdebug_num_tgts = n;
6077 sdebug_max_tgts_luns();
6078 return count;
6079 }
6080 return -EINVAL;
6081}
6082static DRIVER_ATTR_RW(num_tgts);
6083
6084static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
6085{
6086 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dev_size_mb);
6087}
6088static DRIVER_ATTR_RO(dev_size_mb);
6089
6090static ssize_t per_host_store_show(struct device_driver *ddp, char *buf)
6091{
6092 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_per_host_store);
6093}
6094
6095static ssize_t per_host_store_store(struct device_driver *ddp, const char *buf,
6096 size_t count)
6097{
6098 bool v;
6099
6100 if (kstrtobool(buf, &v))
6101 return -EINVAL;
6102
6103 sdebug_per_host_store = v;
6104 return count;
6105}
6106static DRIVER_ATTR_RW(per_host_store);
6107
6108static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
6109{
6110 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_parts);
6111}
6112static DRIVER_ATTR_RO(num_parts);
6113
6114static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
6115{
6116 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_every_nth);
6117}
6118static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
6119 size_t count)
6120{
6121 int nth;
6122 char work[20];
6123
6124 if (sscanf(buf, "%10s", work) == 1) {
6125 if (strncasecmp(work, "0x", 2) == 0) {
6126 if (kstrtoint(work + 2, 16, &nth) == 0)
6127 goto every_nth_done;
6128 } else {
6129 if (kstrtoint(work, 10, &nth) == 0)
6130 goto every_nth_done;
6131 }
6132 }
6133 return -EINVAL;
6134
6135every_nth_done:
6136 sdebug_every_nth = nth;
6137 if (nth && !sdebug_statistics) {
6138 pr_info("every_nth needs statistics=1, set it\n");
6139 sdebug_statistics = true;
6140 }
6141 tweak_cmnd_count();
6142 return count;
6143}
6144static DRIVER_ATTR_RW(every_nth);
6145
6146static ssize_t lun_format_show(struct device_driver *ddp, char *buf)
6147{
6148 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_lun_am);
6149}
6150static ssize_t lun_format_store(struct device_driver *ddp, const char *buf,
6151 size_t count)
6152{
6153 int n;
6154 bool changed;
6155
6156 if (kstrtoint(buf, 0, &n))
6157 return -EINVAL;
6158 if (n >= 0) {
6159 if (n > (int)SAM_LUN_AM_FLAT) {
6160 pr_warn("only LUN address methods 0 and 1 are supported\n");
6161 return -EINVAL;
6162 }
6163 changed = ((int)sdebug_lun_am != n);
6164 sdebug_lun_am = n;
6165 if (changed && sdebug_scsi_level >= 5) { /* >= SPC-3 */
6166 struct sdebug_host_info *sdhp;
6167 struct sdebug_dev_info *dp;
6168
6169 spin_lock(&sdebug_host_list_lock);
6170 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
6171 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
6172 set_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
6173 }
6174 }
6175 spin_unlock(&sdebug_host_list_lock);
6176 }
6177 return count;
6178 }
6179 return -EINVAL;
6180}
6181static DRIVER_ATTR_RW(lun_format);
6182
6183static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
6184{
6185 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_luns);
6186}
6187static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
6188 size_t count)
6189{
6190 int n;
6191 bool changed;
6192
6193 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6194 if (n > 256) {
6195 pr_warn("max_luns can be no more than 256\n");
6196 return -EINVAL;
6197 }
6198 changed = (sdebug_max_luns != n);
6199 sdebug_max_luns = n;
6200 sdebug_max_tgts_luns();
6201 if (changed && (sdebug_scsi_level >= 5)) { /* >= SPC-3 */
6202 struct sdebug_host_info *sdhp;
6203 struct sdebug_dev_info *dp;
6204
6205 spin_lock(&sdebug_host_list_lock);
6206 list_for_each_entry(sdhp, &sdebug_host_list,
6207 host_list) {
6208 list_for_each_entry(dp, &sdhp->dev_info_list,
6209 dev_list) {
6210 set_bit(SDEBUG_UA_LUNS_CHANGED,
6211 dp->uas_bm);
6212 }
6213 }
6214 spin_unlock(&sdebug_host_list_lock);
6215 }
6216 return count;
6217 }
6218 return -EINVAL;
6219}
6220static DRIVER_ATTR_RW(max_luns);
6221
6222static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
6223{
6224 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_queue);
6225}
6226/* N.B. max_queue can be changed while there are queued commands. In flight
6227 * commands beyond the new max_queue will be completed. */
6228static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
6229 size_t count)
6230{
6231 int j, n, k, a;
6232 struct sdebug_queue *sqp;
6233
6234 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
6235 (n <= SDEBUG_CANQUEUE) &&
6236 (sdebug_host_max_queue == 0)) {
6237 block_unblock_all_queues(true);
6238 k = 0;
6239 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
6240 ++j, ++sqp) {
6241 a = find_last_bit(sqp->in_use_bm, SDEBUG_CANQUEUE);
6242 if (a > k)
6243 k = a;
6244 }
6245 sdebug_max_queue = n;
6246 if (k == SDEBUG_CANQUEUE)
6247 atomic_set(&retired_max_queue, 0);
6248 else if (k >= n)
6249 atomic_set(&retired_max_queue, k + 1);
6250 else
6251 atomic_set(&retired_max_queue, 0);
6252 block_unblock_all_queues(false);
6253 return count;
6254 }
6255 return -EINVAL;
6256}
6257static DRIVER_ATTR_RW(max_queue);
6258
6259static ssize_t host_max_queue_show(struct device_driver *ddp, char *buf)
6260{
6261 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_host_max_queue);
6262}
6263
6264/*
6265 * Since this is used for .can_queue, and we get the hc_idx tag from the bitmap
6266 * in range [0, sdebug_host_max_queue), we can't change it.
6267 */
6268static DRIVER_ATTR_RO(host_max_queue);
6269
6270static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
6271{
6272 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_uld);
6273}
6274static DRIVER_ATTR_RO(no_uld);
6275
6276static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
6277{
6278 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_scsi_level);
6279}
6280static DRIVER_ATTR_RO(scsi_level);
6281
6282static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
6283{
6284 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_virtual_gb);
6285}
6286static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
6287 size_t count)
6288{
6289 int n;
6290 bool changed;
6291
6292 /* Ignore capacity change for ZBC drives for now */
6293 if (sdeb_zbc_in_use)
6294 return -ENOTSUPP;
6295
6296 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6297 changed = (sdebug_virtual_gb != n);
6298 sdebug_virtual_gb = n;
6299 sdebug_capacity = get_sdebug_capacity();
6300 if (changed) {
6301 struct sdebug_host_info *sdhp;
6302 struct sdebug_dev_info *dp;
6303
6304 spin_lock(&sdebug_host_list_lock);
6305 list_for_each_entry(sdhp, &sdebug_host_list,
6306 host_list) {
6307 list_for_each_entry(dp, &sdhp->dev_info_list,
6308 dev_list) {
6309 set_bit(SDEBUG_UA_CAPACITY_CHANGED,
6310 dp->uas_bm);
6311 }
6312 }
6313 spin_unlock(&sdebug_host_list_lock);
6314 }
6315 return count;
6316 }
6317 return -EINVAL;
6318}
6319static DRIVER_ATTR_RW(virtual_gb);
6320
6321static ssize_t add_host_show(struct device_driver *ddp, char *buf)
6322{
6323 /* absolute number of hosts currently active is what is shown */
6324 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_hosts);
6325}
6326
6327static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
6328 size_t count)
6329{
6330 bool found;
6331 unsigned long idx;
6332 struct sdeb_store_info *sip;
6333 bool want_phs = (sdebug_fake_rw == 0) && sdebug_per_host_store;
6334 int delta_hosts;
6335
6336 if (sscanf(buf, "%d", &delta_hosts) != 1)
6337 return -EINVAL;
6338 if (delta_hosts > 0) {
6339 do {
6340 found = false;
6341 if (want_phs) {
6342 xa_for_each_marked(per_store_ap, idx, sip,
6343 SDEB_XA_NOT_IN_USE) {
6344 sdeb_most_recent_idx = (int)idx;
6345 found = true;
6346 break;
6347 }
6348 if (found) /* re-use case */
6349 sdebug_add_host_helper((int)idx);
6350 else
6351 sdebug_do_add_host(true);
6352 } else {
6353 sdebug_do_add_host(false);
6354 }
6355 } while (--delta_hosts);
6356 } else if (delta_hosts < 0) {
6357 do {
6358 sdebug_do_remove_host(false);
6359 } while (++delta_hosts);
6360 }
6361 return count;
6362}
6363static DRIVER_ATTR_RW(add_host);
6364
6365static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
6366{
6367 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_vpd_use_hostno);
6368}
6369static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
6370 size_t count)
6371{
6372 int n;
6373
6374 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6375 sdebug_vpd_use_hostno = n;
6376 return count;
6377 }
6378 return -EINVAL;
6379}
6380static DRIVER_ATTR_RW(vpd_use_hostno);
6381
6382static ssize_t statistics_show(struct device_driver *ddp, char *buf)
6383{
6384 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_statistics);
6385}
6386static ssize_t statistics_store(struct device_driver *ddp, const char *buf,
6387 size_t count)
6388{
6389 int n;
6390
6391 if ((count > 0) && (sscanf(buf, "%d", &n) == 1) && (n >= 0)) {
6392 if (n > 0)
6393 sdebug_statistics = true;
6394 else {
6395 clear_queue_stats();
6396 sdebug_statistics = false;
6397 }
6398 return count;
6399 }
6400 return -EINVAL;
6401}
6402static DRIVER_ATTR_RW(statistics);
6403
6404static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
6405{
6406 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_sector_size);
6407}
6408static DRIVER_ATTR_RO(sector_size);
6409
6410static ssize_t submit_queues_show(struct device_driver *ddp, char *buf)
6411{
6412 return scnprintf(buf, PAGE_SIZE, "%d\n", submit_queues);
6413}
6414static DRIVER_ATTR_RO(submit_queues);
6415
6416static ssize_t dix_show(struct device_driver *ddp, char *buf)
6417{
6418 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dix);
6419}
6420static DRIVER_ATTR_RO(dix);
6421
6422static ssize_t dif_show(struct device_driver *ddp, char *buf)
6423{
6424 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dif);
6425}
6426static DRIVER_ATTR_RO(dif);
6427
6428static ssize_t guard_show(struct device_driver *ddp, char *buf)
6429{
6430 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_guard);
6431}
6432static DRIVER_ATTR_RO(guard);
6433
6434static ssize_t ato_show(struct device_driver *ddp, char *buf)
6435{
6436 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ato);
6437}
6438static DRIVER_ATTR_RO(ato);
6439
6440static ssize_t map_show(struct device_driver *ddp, char *buf)
6441{
6442 ssize_t count = 0;
6443
6444 if (!scsi_debug_lbp())
6445 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
6446 sdebug_store_sectors);
6447
6448 if (sdebug_fake_rw == 0 && !xa_empty(per_store_ap)) {
6449 struct sdeb_store_info *sip = xa_load(per_store_ap, 0);
6450
6451 if (sip)
6452 count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
6453 (int)map_size, sip->map_storep);
6454 }
6455 buf[count++] = '\n';
6456 buf[count] = '\0';
6457
6458 return count;
6459}
6460static DRIVER_ATTR_RO(map);
6461
6462static ssize_t random_show(struct device_driver *ddp, char *buf)
6463{
6464 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_random);
6465}
6466
6467static ssize_t random_store(struct device_driver *ddp, const char *buf,
6468 size_t count)
6469{
6470 bool v;
6471
6472 if (kstrtobool(buf, &v))
6473 return -EINVAL;
6474
6475 sdebug_random = v;
6476 return count;
6477}
6478static DRIVER_ATTR_RW(random);
6479
6480static ssize_t removable_show(struct device_driver *ddp, char *buf)
6481{
6482 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_removable ? 1 : 0);
6483}
6484static ssize_t removable_store(struct device_driver *ddp, const char *buf,
6485 size_t count)
6486{
6487 int n;
6488
6489 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6490 sdebug_removable = (n > 0);
6491 return count;
6492 }
6493 return -EINVAL;
6494}
6495static DRIVER_ATTR_RW(removable);
6496
6497static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
6498{
6499 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_host_lock);
6500}
6501/* N.B. sdebug_host_lock does nothing, kept for backward compatibility */
6502static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
6503 size_t count)
6504{
6505 int n;
6506
6507 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6508 sdebug_host_lock = (n > 0);
6509 return count;
6510 }
6511 return -EINVAL;
6512}
6513static DRIVER_ATTR_RW(host_lock);
6514
6515static ssize_t strict_show(struct device_driver *ddp, char *buf)
6516{
6517 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_strict);
6518}
6519static ssize_t strict_store(struct device_driver *ddp, const char *buf,
6520 size_t count)
6521{
6522 int n;
6523
6524 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6525 sdebug_strict = (n > 0);
6526 return count;
6527 }
6528 return -EINVAL;
6529}
6530static DRIVER_ATTR_RW(strict);
6531
6532static ssize_t uuid_ctl_show(struct device_driver *ddp, char *buf)
6533{
6534 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_uuid_ctl);
6535}
6536static DRIVER_ATTR_RO(uuid_ctl);
6537
6538static ssize_t cdb_len_show(struct device_driver *ddp, char *buf)
6539{
6540 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_cdb_len);
6541}
6542static ssize_t cdb_len_store(struct device_driver *ddp, const char *buf,
6543 size_t count)
6544{
6545 int ret, n;
6546
6547 ret = kstrtoint(buf, 0, &n);
6548 if (ret)
6549 return ret;
6550 sdebug_cdb_len = n;
6551 all_config_cdb_len();
6552 return count;
6553}
6554static DRIVER_ATTR_RW(cdb_len);
6555
6556static const char * const zbc_model_strs_a[] = {
6557 [BLK_ZONED_NONE] = "none",
6558 [BLK_ZONED_HA] = "host-aware",
6559 [BLK_ZONED_HM] = "host-managed",
6560};
6561
6562static const char * const zbc_model_strs_b[] = {
6563 [BLK_ZONED_NONE] = "no",
6564 [BLK_ZONED_HA] = "aware",
6565 [BLK_ZONED_HM] = "managed",
6566};
6567
6568static const char * const zbc_model_strs_c[] = {
6569 [BLK_ZONED_NONE] = "0",
6570 [BLK_ZONED_HA] = "1",
6571 [BLK_ZONED_HM] = "2",
6572};
6573
6574static int sdeb_zbc_model_str(const char *cp)
6575{
6576 int res = sysfs_match_string(zbc_model_strs_a, cp);
6577
6578 if (res < 0) {
6579 res = sysfs_match_string(zbc_model_strs_b, cp);
6580 if (res < 0) {
6581 res = sysfs_match_string(zbc_model_strs_c, cp);
6582 if (res < 0)
6583 return -EINVAL;
6584 }
6585 }
6586 return res;
6587}
6588
6589static ssize_t zbc_show(struct device_driver *ddp, char *buf)
6590{
6591 return scnprintf(buf, PAGE_SIZE, "%s\n",
6592 zbc_model_strs_a[sdeb_zbc_model]);
6593}
6594static DRIVER_ATTR_RO(zbc);
6595
6596static ssize_t tur_ms_to_ready_show(struct device_driver *ddp, char *buf)
6597{
6598 return scnprintf(buf, PAGE_SIZE, "%d\n", sdeb_tur_ms_to_ready);
6599}
6600static DRIVER_ATTR_RO(tur_ms_to_ready);
6601
6602/* Note: The following array creates attribute files in the
6603 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
6604 files (over those found in the /sys/module/scsi_debug/parameters
6605 directory) is that auxiliary actions can be triggered when an attribute
6606 is changed. For example see: add_host_store() above.
6607 */
6608
6609static struct attribute *sdebug_drv_attrs[] = {
6610 &driver_attr_delay.attr,
6611 &driver_attr_opts.attr,
6612 &driver_attr_ptype.attr,
6613 &driver_attr_dsense.attr,
6614 &driver_attr_fake_rw.attr,
6615 &driver_attr_host_max_queue.attr,
6616 &driver_attr_no_lun_0.attr,
6617 &driver_attr_num_tgts.attr,
6618 &driver_attr_dev_size_mb.attr,
6619 &driver_attr_num_parts.attr,
6620 &driver_attr_every_nth.attr,
6621 &driver_attr_lun_format.attr,
6622 &driver_attr_max_luns.attr,
6623 &driver_attr_max_queue.attr,
6624 &driver_attr_no_uld.attr,
6625 &driver_attr_scsi_level.attr,
6626 &driver_attr_virtual_gb.attr,
6627 &driver_attr_add_host.attr,
6628 &driver_attr_per_host_store.attr,
6629 &driver_attr_vpd_use_hostno.attr,
6630 &driver_attr_sector_size.attr,
6631 &driver_attr_statistics.attr,
6632 &driver_attr_submit_queues.attr,
6633 &driver_attr_dix.attr,
6634 &driver_attr_dif.attr,
6635 &driver_attr_guard.attr,
6636 &driver_attr_ato.attr,
6637 &driver_attr_map.attr,
6638 &driver_attr_random.attr,
6639 &driver_attr_removable.attr,
6640 &driver_attr_host_lock.attr,
6641 &driver_attr_ndelay.attr,
6642 &driver_attr_strict.attr,
6643 &driver_attr_uuid_ctl.attr,
6644 &driver_attr_cdb_len.attr,
6645 &driver_attr_tur_ms_to_ready.attr,
6646 &driver_attr_zbc.attr,
6647 NULL,
6648};
6649ATTRIBUTE_GROUPS(sdebug_drv);
6650
6651static struct device *pseudo_primary;
6652
6653static int __init scsi_debug_init(void)
6654{
6655 bool want_store = (sdebug_fake_rw == 0);
6656 unsigned long sz;
6657 int k, ret, hosts_to_add;
6658 int idx = -1;
6659
6660 ramdisk_lck_a[0] = &atomic_rw;
6661 ramdisk_lck_a[1] = &atomic_rw2;
6662 atomic_set(&retired_max_queue, 0);
6663
6664 if (sdebug_ndelay >= 1000 * 1000 * 1000) {
6665 pr_warn("ndelay must be less than 1 second, ignored\n");
6666 sdebug_ndelay = 0;
6667 } else if (sdebug_ndelay > 0)
6668 sdebug_jdelay = JDELAY_OVERRIDDEN;
6669
6670 switch (sdebug_sector_size) {
6671 case 512:
6672 case 1024:
6673 case 2048:
6674 case 4096:
6675 break;
6676 default:
6677 pr_err("invalid sector_size %d\n", sdebug_sector_size);
6678 return -EINVAL;
6679 }
6680
6681 switch (sdebug_dif) {
6682 case T10_PI_TYPE0_PROTECTION:
6683 break;
6684 case T10_PI_TYPE1_PROTECTION:
6685 case T10_PI_TYPE2_PROTECTION:
6686 case T10_PI_TYPE3_PROTECTION:
6687 have_dif_prot = true;
6688 break;
6689
6690 default:
6691 pr_err("dif must be 0, 1, 2 or 3\n");
6692 return -EINVAL;
6693 }
6694
6695 if (sdebug_num_tgts < 0) {
6696 pr_err("num_tgts must be >= 0\n");
6697 return -EINVAL;
6698 }
6699
6700 if (sdebug_guard > 1) {
6701 pr_err("guard must be 0 or 1\n");
6702 return -EINVAL;
6703 }
6704
6705 if (sdebug_ato > 1) {
6706 pr_err("ato must be 0 or 1\n");
6707 return -EINVAL;
6708 }
6709
6710 if (sdebug_physblk_exp > 15) {
6711 pr_err("invalid physblk_exp %u\n", sdebug_physblk_exp);
6712 return -EINVAL;
6713 }
6714
6715 sdebug_lun_am = sdebug_lun_am_i;
6716 if (sdebug_lun_am > SAM_LUN_AM_FLAT) {
6717 pr_warn("Invalid LUN format %u, using default\n", (int)sdebug_lun_am);
6718 sdebug_lun_am = SAM_LUN_AM_PERIPHERAL;
6719 }
6720
6721 if (sdebug_max_luns > 256) {
6722 if (sdebug_max_luns > 16384) {
6723 pr_warn("max_luns can be no more than 16384, use default\n");
6724 sdebug_max_luns = DEF_MAX_LUNS;
6725 }
6726 sdebug_lun_am = SAM_LUN_AM_FLAT;
6727 }
6728
6729 if (sdebug_lowest_aligned > 0x3fff) {
6730 pr_err("lowest_aligned too big: %u\n", sdebug_lowest_aligned);
6731 return -EINVAL;
6732 }
6733
6734 if (submit_queues < 1) {
6735 pr_err("submit_queues must be 1 or more\n");
6736 return -EINVAL;
6737 }
6738
6739 if ((sdebug_max_queue > SDEBUG_CANQUEUE) || (sdebug_max_queue < 1)) {
6740 pr_err("max_queue must be in range [1, %d]\n", SDEBUG_CANQUEUE);
6741 return -EINVAL;
6742 }
6743
6744 if ((sdebug_host_max_queue > SDEBUG_CANQUEUE) ||
6745 (sdebug_host_max_queue < 0)) {
6746 pr_err("host_max_queue must be in range [0 %d]\n",
6747 SDEBUG_CANQUEUE);
6748 return -EINVAL;
6749 }
6750
6751 if (sdebug_host_max_queue &&
6752 (sdebug_max_queue != sdebug_host_max_queue)) {
6753 sdebug_max_queue = sdebug_host_max_queue;
6754 pr_warn("fixing max submit queue depth to host max queue depth, %d\n",
6755 sdebug_max_queue);
6756 }
6757
6758 sdebug_q_arr = kcalloc(submit_queues, sizeof(struct sdebug_queue),
6759 GFP_KERNEL);
6760 if (sdebug_q_arr == NULL)
6761 return -ENOMEM;
6762 for (k = 0; k < submit_queues; ++k)
6763 spin_lock_init(&sdebug_q_arr[k].qc_lock);
6764
6765 /*
6766 * check for host managed zoned block device specified with
6767 * ptype=0x14 or zbc=XXX.
6768 */
6769 if (sdebug_ptype == TYPE_ZBC) {
6770 sdeb_zbc_model = BLK_ZONED_HM;
6771 } else if (sdeb_zbc_model_s && *sdeb_zbc_model_s) {
6772 k = sdeb_zbc_model_str(sdeb_zbc_model_s);
6773 if (k < 0) {
6774 ret = k;
6775 goto free_q_arr;
6776 }
6777 sdeb_zbc_model = k;
6778 switch (sdeb_zbc_model) {
6779 case BLK_ZONED_NONE:
6780 case BLK_ZONED_HA:
6781 sdebug_ptype = TYPE_DISK;
6782 break;
6783 case BLK_ZONED_HM:
6784 sdebug_ptype = TYPE_ZBC;
6785 break;
6786 default:
6787 pr_err("Invalid ZBC model\n");
6788 ret = -EINVAL;
6789 goto free_q_arr;
6790 }
6791 }
6792 if (sdeb_zbc_model != BLK_ZONED_NONE) {
6793 sdeb_zbc_in_use = true;
6794 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT)
6795 sdebug_dev_size_mb = DEF_ZBC_DEV_SIZE_MB;
6796 }
6797
6798 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT)
6799 sdebug_dev_size_mb = DEF_DEV_SIZE_MB;
6800 if (sdebug_dev_size_mb < 1)
6801 sdebug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
6802 sz = (unsigned long)sdebug_dev_size_mb * 1048576;
6803 sdebug_store_sectors = sz / sdebug_sector_size;
6804 sdebug_capacity = get_sdebug_capacity();
6805
6806 /* play around with geometry, don't waste too much on track 0 */
6807 sdebug_heads = 8;
6808 sdebug_sectors_per = 32;
6809 if (sdebug_dev_size_mb >= 256)
6810 sdebug_heads = 64;
6811 else if (sdebug_dev_size_mb >= 16)
6812 sdebug_heads = 32;
6813 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
6814 (sdebug_sectors_per * sdebug_heads);
6815 if (sdebug_cylinders_per >= 1024) {
6816 /* other LLDs do this; implies >= 1GB ram disk ... */
6817 sdebug_heads = 255;
6818 sdebug_sectors_per = 63;
6819 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
6820 (sdebug_sectors_per * sdebug_heads);
6821 }
6822 if (scsi_debug_lbp()) {
6823 sdebug_unmap_max_blocks =
6824 clamp(sdebug_unmap_max_blocks, 0U, 0xffffffffU);
6825
6826 sdebug_unmap_max_desc =
6827 clamp(sdebug_unmap_max_desc, 0U, 256U);
6828
6829 sdebug_unmap_granularity =
6830 clamp(sdebug_unmap_granularity, 1U, 0xffffffffU);
6831
6832 if (sdebug_unmap_alignment &&
6833 sdebug_unmap_granularity <=
6834 sdebug_unmap_alignment) {
6835 pr_err("ERR: unmap_granularity <= unmap_alignment\n");
6836 ret = -EINVAL;
6837 goto free_q_arr;
6838 }
6839 }
6840 xa_init_flags(per_store_ap, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ);
6841 if (want_store) {
6842 idx = sdebug_add_store();
6843 if (idx < 0) {
6844 ret = idx;
6845 goto free_q_arr;
6846 }
6847 }
6848
6849 pseudo_primary = root_device_register("pseudo_0");
6850 if (IS_ERR(pseudo_primary)) {
6851 pr_warn("root_device_register() error\n");
6852 ret = PTR_ERR(pseudo_primary);
6853 goto free_vm;
6854 }
6855 ret = bus_register(&pseudo_lld_bus);
6856 if (ret < 0) {
6857 pr_warn("bus_register error: %d\n", ret);
6858 goto dev_unreg;
6859 }
6860 ret = driver_register(&sdebug_driverfs_driver);
6861 if (ret < 0) {
6862 pr_warn("driver_register error: %d\n", ret);
6863 goto bus_unreg;
6864 }
6865
6866 hosts_to_add = sdebug_add_host;
6867 sdebug_add_host = 0;
6868
6869 for (k = 0; k < hosts_to_add; k++) {
6870 if (want_store && k == 0) {
6871 ret = sdebug_add_host_helper(idx);
6872 if (ret < 0) {
6873 pr_err("add_host_helper k=%d, error=%d\n",
6874 k, -ret);
6875 break;
6876 }
6877 } else {
6878 ret = sdebug_do_add_host(want_store &&
6879 sdebug_per_host_store);
6880 if (ret < 0) {
6881 pr_err("add_host k=%d error=%d\n", k, -ret);
6882 break;
6883 }
6884 }
6885 }
6886 if (sdebug_verbose)
6887 pr_info("built %d host(s)\n", sdebug_num_hosts);
6888
6889 return 0;
6890
6891bus_unreg:
6892 bus_unregister(&pseudo_lld_bus);
6893dev_unreg:
6894 root_device_unregister(pseudo_primary);
6895free_vm:
6896 sdebug_erase_store(idx, NULL);
6897free_q_arr:
6898 kfree(sdebug_q_arr);
6899 return ret;
6900}
6901
6902static void __exit scsi_debug_exit(void)
6903{
6904 int k = sdebug_num_hosts;
6905
6906 stop_all_queued();
6907 for (; k; k--)
6908 sdebug_do_remove_host(true);
6909 free_all_queued();
6910 driver_unregister(&sdebug_driverfs_driver);
6911 bus_unregister(&pseudo_lld_bus);
6912 root_device_unregister(pseudo_primary);
6913
6914 sdebug_erase_all_stores(false);
6915 xa_destroy(per_store_ap);
6916 kfree(sdebug_q_arr);
6917}
6918
6919device_initcall(scsi_debug_init);
6920module_exit(scsi_debug_exit);
6921
6922static void sdebug_release_adapter(struct device *dev)
6923{
6924 struct sdebug_host_info *sdbg_host;
6925
6926 sdbg_host = to_sdebug_host(dev);
6927 kfree(sdbg_host);
6928}
6929
6930/* idx must be valid, if sip is NULL then it will be obtained using idx */
6931static void sdebug_erase_store(int idx, struct sdeb_store_info *sip)
6932{
6933 if (idx < 0)
6934 return;
6935 if (!sip) {
6936 if (xa_empty(per_store_ap))
6937 return;
6938 sip = xa_load(per_store_ap, idx);
6939 if (!sip)
6940 return;
6941 }
6942 vfree(sip->map_storep);
6943 vfree(sip->dif_storep);
6944 vfree(sip->storep);
6945 xa_erase(per_store_ap, idx);
6946 kfree(sip);
6947}
6948
6949/* Assume apart_from_first==false only in shutdown case. */
6950static void sdebug_erase_all_stores(bool apart_from_first)
6951{
6952 unsigned long idx;
6953 struct sdeb_store_info *sip = NULL;
6954
6955 xa_for_each(per_store_ap, idx, sip) {
6956 if (apart_from_first)
6957 apart_from_first = false;
6958 else
6959 sdebug_erase_store(idx, sip);
6960 }
6961 if (apart_from_first)
6962 sdeb_most_recent_idx = sdeb_first_idx;
6963}
6964
6965/*
6966 * Returns store xarray new element index (idx) if >=0 else negated errno.
6967 * Limit the number of stores to 65536.
6968 */
6969static int sdebug_add_store(void)
6970{
6971 int res;
6972 u32 n_idx;
6973 unsigned long iflags;
6974 unsigned long sz = (unsigned long)sdebug_dev_size_mb * 1048576;
6975 struct sdeb_store_info *sip = NULL;
6976 struct xa_limit xal = { .max = 1 << 16, .min = 0 };
6977
6978 sip = kzalloc(sizeof(*sip), GFP_KERNEL);
6979 if (!sip)
6980 return -ENOMEM;
6981
6982 xa_lock_irqsave(per_store_ap, iflags);
6983 res = __xa_alloc(per_store_ap, &n_idx, sip, xal, GFP_ATOMIC);
6984 if (unlikely(res < 0)) {
6985 xa_unlock_irqrestore(per_store_ap, iflags);
6986 kfree(sip);
6987 pr_warn("%s: xa_alloc() errno=%d\n", __func__, -res);
6988 return res;
6989 }
6990 sdeb_most_recent_idx = n_idx;
6991 if (sdeb_first_idx < 0)
6992 sdeb_first_idx = n_idx;
6993 xa_unlock_irqrestore(per_store_ap, iflags);
6994
6995 res = -ENOMEM;
6996 sip->storep = vzalloc(sz);
6997 if (!sip->storep) {
6998 pr_err("user data oom\n");
6999 goto err;
7000 }
7001 if (sdebug_num_parts > 0)
7002 sdebug_build_parts(sip->storep, sz);
7003
7004 /* DIF/DIX: what T10 calls Protection Information (PI) */
7005 if (sdebug_dix) {
7006 int dif_size;
7007
7008 dif_size = sdebug_store_sectors * sizeof(struct t10_pi_tuple);
7009 sip->dif_storep = vmalloc(dif_size);
7010
7011 pr_info("dif_storep %u bytes @ %pK\n", dif_size,
7012 sip->dif_storep);
7013
7014 if (!sip->dif_storep) {
7015 pr_err("DIX oom\n");
7016 goto err;
7017 }
7018 memset(sip->dif_storep, 0xff, dif_size);
7019 }
7020 /* Logical Block Provisioning */
7021 if (scsi_debug_lbp()) {
7022 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
7023 sip->map_storep = vmalloc(array_size(sizeof(long),
7024 BITS_TO_LONGS(map_size)));
7025
7026 pr_info("%lu provisioning blocks\n", map_size);
7027
7028 if (!sip->map_storep) {
7029 pr_err("LBP map oom\n");
7030 goto err;
7031 }
7032
7033 bitmap_zero(sip->map_storep, map_size);
7034
7035 /* Map first 1KB for partition table */
7036 if (sdebug_num_parts)
7037 map_region(sip, 0, 2);
7038 }
7039
7040 rwlock_init(&sip->macc_lck);
7041 return (int)n_idx;
7042err:
7043 sdebug_erase_store((int)n_idx, sip);
7044 pr_warn("%s: failed, errno=%d\n", __func__, -res);
7045 return res;
7046}
7047
7048static int sdebug_add_host_helper(int per_host_idx)
7049{
7050 int k, devs_per_host, idx;
7051 int error = -ENOMEM;
7052 struct sdebug_host_info *sdbg_host;
7053 struct sdebug_dev_info *sdbg_devinfo, *tmp;
7054
7055 sdbg_host = kzalloc(sizeof(*sdbg_host), GFP_KERNEL);
7056 if (!sdbg_host)
7057 return -ENOMEM;
7058 idx = (per_host_idx < 0) ? sdeb_first_idx : per_host_idx;
7059 if (xa_get_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE))
7060 xa_clear_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE);
7061 sdbg_host->si_idx = idx;
7062
7063 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
7064
7065 devs_per_host = sdebug_num_tgts * sdebug_max_luns;
7066 for (k = 0; k < devs_per_host; k++) {
7067 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
7068 if (!sdbg_devinfo)
7069 goto clean;
7070 }
7071
7072 spin_lock(&sdebug_host_list_lock);
7073 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
7074 spin_unlock(&sdebug_host_list_lock);
7075
7076 sdbg_host->dev.bus = &pseudo_lld_bus;
7077 sdbg_host->dev.parent = pseudo_primary;
7078 sdbg_host->dev.release = &sdebug_release_adapter;
7079 dev_set_name(&sdbg_host->dev, "adapter%d", sdebug_num_hosts);
7080
7081 error = device_register(&sdbg_host->dev);
7082 if (error)
7083 goto clean;
7084
7085 ++sdebug_num_hosts;
7086 return 0;
7087
7088clean:
7089 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
7090 dev_list) {
7091 list_del(&sdbg_devinfo->dev_list);
7092 kfree(sdbg_devinfo->zstate);
7093 kfree(sdbg_devinfo);
7094 }
7095 kfree(sdbg_host);
7096 pr_warn("%s: failed, errno=%d\n", __func__, -error);
7097 return error;
7098}
7099
7100static int sdebug_do_add_host(bool mk_new_store)
7101{
7102 int ph_idx = sdeb_most_recent_idx;
7103
7104 if (mk_new_store) {
7105 ph_idx = sdebug_add_store();
7106 if (ph_idx < 0)
7107 return ph_idx;
7108 }
7109 return sdebug_add_host_helper(ph_idx);
7110}
7111
7112static void sdebug_do_remove_host(bool the_end)
7113{
7114 int idx = -1;
7115 struct sdebug_host_info *sdbg_host = NULL;
7116 struct sdebug_host_info *sdbg_host2;
7117
7118 spin_lock(&sdebug_host_list_lock);
7119 if (!list_empty(&sdebug_host_list)) {
7120 sdbg_host = list_entry(sdebug_host_list.prev,
7121 struct sdebug_host_info, host_list);
7122 idx = sdbg_host->si_idx;
7123 }
7124 if (!the_end && idx >= 0) {
7125 bool unique = true;
7126
7127 list_for_each_entry(sdbg_host2, &sdebug_host_list, host_list) {
7128 if (sdbg_host2 == sdbg_host)
7129 continue;
7130 if (idx == sdbg_host2->si_idx) {
7131 unique = false;
7132 break;
7133 }
7134 }
7135 if (unique) {
7136 xa_set_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE);
7137 if (idx == sdeb_most_recent_idx)
7138 --sdeb_most_recent_idx;
7139 }
7140 }
7141 if (sdbg_host)
7142 list_del(&sdbg_host->host_list);
7143 spin_unlock(&sdebug_host_list_lock);
7144
7145 if (!sdbg_host)
7146 return;
7147
7148 device_unregister(&sdbg_host->dev);
7149 --sdebug_num_hosts;
7150}
7151
7152static int sdebug_change_qdepth(struct scsi_device *sdev, int qdepth)
7153{
7154 int num_in_q = 0;
7155 struct sdebug_dev_info *devip;
7156
7157 block_unblock_all_queues(true);
7158 devip = (struct sdebug_dev_info *)sdev->hostdata;
7159 if (NULL == devip) {
7160 block_unblock_all_queues(false);
7161 return -ENODEV;
7162 }
7163 num_in_q = atomic_read(&devip->num_in_q);
7164
7165 if (qdepth > SDEBUG_CANQUEUE) {
7166 qdepth = SDEBUG_CANQUEUE;
7167 pr_warn("%s: requested qdepth [%d] exceeds canqueue [%d], trim\n", __func__,
7168 qdepth, SDEBUG_CANQUEUE);
7169 }
7170 if (qdepth < 1)
7171 qdepth = 1;
7172 if (qdepth != sdev->queue_depth)
7173 scsi_change_queue_depth(sdev, qdepth);
7174
7175 if (SDEBUG_OPT_Q_NOISE & sdebug_opts) {
7176 sdev_printk(KERN_INFO, sdev, "%s: qdepth=%d, num_in_q=%d\n",
7177 __func__, qdepth, num_in_q);
7178 }
7179 block_unblock_all_queues(false);
7180 return sdev->queue_depth;
7181}
7182
7183static bool fake_timeout(struct scsi_cmnd *scp)
7184{
7185 if (0 == (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth))) {
7186 if (sdebug_every_nth < -1)
7187 sdebug_every_nth = -1;
7188 if (SDEBUG_OPT_TIMEOUT & sdebug_opts)
7189 return true; /* ignore command causing timeout */
7190 else if (SDEBUG_OPT_MAC_TIMEOUT & sdebug_opts &&
7191 scsi_medium_access_command(scp))
7192 return true; /* time out reads and writes */
7193 }
7194 return false;
7195}
7196
7197/* Response to TUR or media access command when device stopped */
7198static int resp_not_ready(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
7199{
7200 int stopped_state;
7201 u64 diff_ns = 0;
7202 ktime_t now_ts = ktime_get_boottime();
7203 struct scsi_device *sdp = scp->device;
7204
7205 stopped_state = atomic_read(&devip->stopped);
7206 if (stopped_state == 2) {
7207 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) {
7208 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts));
7209 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) {
7210 /* tur_ms_to_ready timer extinguished */
7211 atomic_set(&devip->stopped, 0);
7212 return 0;
7213 }
7214 }
7215 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x1);
7216 if (sdebug_verbose)
7217 sdev_printk(KERN_INFO, sdp,
7218 "%s: Not ready: in process of becoming ready\n", my_name);
7219 if (scp->cmnd[0] == TEST_UNIT_READY) {
7220 u64 tur_nanosecs_to_ready = (u64)sdeb_tur_ms_to_ready * 1000000;
7221
7222 if (diff_ns <= tur_nanosecs_to_ready)
7223 diff_ns = tur_nanosecs_to_ready - diff_ns;
7224 else
7225 diff_ns = tur_nanosecs_to_ready;
7226 /* As per 20-061r2 approved for spc6 by T10 on 20200716 */
7227 do_div(diff_ns, 1000000); /* diff_ns becomes milliseconds */
7228 scsi_set_sense_information(scp->sense_buffer, SCSI_SENSE_BUFFERSIZE,
7229 diff_ns);
7230 return check_condition_result;
7231 }
7232 }
7233 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2);
7234 if (sdebug_verbose)
7235 sdev_printk(KERN_INFO, sdp, "%s: Not ready: initializing command required\n",
7236 my_name);
7237 return check_condition_result;
7238}
7239
7240static int sdebug_map_queues(struct Scsi_Host *shost)
7241{
7242 int i, qoff;
7243
7244 if (shost->nr_hw_queues == 1)
7245 return 0;
7246
7247 for (i = 0, qoff = 0; i < HCTX_MAX_TYPES; i++) {
7248 struct blk_mq_queue_map *map = &shost->tag_set.map[i];
7249
7250 map->nr_queues = 0;
7251
7252 if (i == HCTX_TYPE_DEFAULT)
7253 map->nr_queues = submit_queues - poll_queues;
7254 else if (i == HCTX_TYPE_POLL)
7255 map->nr_queues = poll_queues;
7256
7257 if (!map->nr_queues) {
7258 BUG_ON(i == HCTX_TYPE_DEFAULT);
7259 continue;
7260 }
7261
7262 map->queue_offset = qoff;
7263 blk_mq_map_queues(map);
7264
7265 qoff += map->nr_queues;
7266 }
7267
7268 return 0;
7269
7270}
7271
7272static int sdebug_blk_mq_poll(struct Scsi_Host *shost, unsigned int queue_num)
7273{
7274 bool first;
7275 bool retiring = false;
7276 int num_entries = 0;
7277 unsigned int qc_idx = 0;
7278 unsigned long iflags;
7279 ktime_t kt_from_boot = ktime_get_boottime();
7280 struct sdebug_queue *sqp;
7281 struct sdebug_queued_cmd *sqcp;
7282 struct scsi_cmnd *scp;
7283 struct sdebug_dev_info *devip;
7284 struct sdebug_defer *sd_dp;
7285
7286 sqp = sdebug_q_arr + queue_num;
7287 spin_lock_irqsave(&sqp->qc_lock, iflags);
7288
7289 for (first = true; first || qc_idx + 1 < sdebug_max_queue; ) {
7290 if (first) {
7291 qc_idx = find_first_bit(sqp->in_use_bm, sdebug_max_queue);
7292 first = false;
7293 } else {
7294 qc_idx = find_next_bit(sqp->in_use_bm, sdebug_max_queue, qc_idx + 1);
7295 }
7296 if (unlikely(qc_idx >= sdebug_max_queue))
7297 break;
7298
7299 sqcp = &sqp->qc_arr[qc_idx];
7300 sd_dp = sqcp->sd_dp;
7301 if (unlikely(!sd_dp))
7302 continue;
7303 scp = sqcp->a_cmnd;
7304 if (unlikely(scp == NULL)) {
7305 pr_err("scp is NULL, queue_num=%d, qc_idx=%u from %s\n",
7306 queue_num, qc_idx, __func__);
7307 break;
7308 }
7309 if (sd_dp->defer_t == SDEB_DEFER_POLL) {
7310 if (kt_from_boot < sd_dp->cmpl_ts)
7311 continue;
7312
7313 } else /* ignoring non REQ_HIPRI requests */
7314 continue;
7315 devip = (struct sdebug_dev_info *)scp->device->hostdata;
7316 if (likely(devip))
7317 atomic_dec(&devip->num_in_q);
7318 else
7319 pr_err("devip=NULL from %s\n", __func__);
7320 if (unlikely(atomic_read(&retired_max_queue) > 0))
7321 retiring = true;
7322
7323 sqcp->a_cmnd = NULL;
7324 if (unlikely(!test_and_clear_bit(qc_idx, sqp->in_use_bm))) {
7325 pr_err("Unexpected completion sqp %p queue_num=%d qc_idx=%u from %s\n",
7326 sqp, queue_num, qc_idx, __func__);
7327 break;
7328 }
7329 if (unlikely(retiring)) { /* user has reduced max_queue */
7330 int k, retval;
7331
7332 retval = atomic_read(&retired_max_queue);
7333 if (qc_idx >= retval) {
7334 pr_err("index %d too large\n", retval);
7335 break;
7336 }
7337 k = find_last_bit(sqp->in_use_bm, retval);
7338 if ((k < sdebug_max_queue) || (k == retval))
7339 atomic_set(&retired_max_queue, 0);
7340 else
7341 atomic_set(&retired_max_queue, k + 1);
7342 }
7343 sd_dp->defer_t = SDEB_DEFER_NONE;
7344 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
7345 scp->scsi_done(scp); /* callback to mid level */
7346 spin_lock_irqsave(&sqp->qc_lock, iflags);
7347 num_entries++;
7348 }
7349 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
7350 if (num_entries > 0)
7351 atomic_add(num_entries, &sdeb_mq_poll_count);
7352 return num_entries;
7353}
7354
7355static int scsi_debug_queuecommand(struct Scsi_Host *shost,
7356 struct scsi_cmnd *scp)
7357{
7358 u8 sdeb_i;
7359 struct scsi_device *sdp = scp->device;
7360 const struct opcode_info_t *oip;
7361 const struct opcode_info_t *r_oip;
7362 struct sdebug_dev_info *devip;
7363 u8 *cmd = scp->cmnd;
7364 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
7365 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *) = NULL;
7366 int k, na;
7367 int errsts = 0;
7368 u64 lun_index = sdp->lun & 0x3FFF;
7369 u32 flags;
7370 u16 sa;
7371 u8 opcode = cmd[0];
7372 bool has_wlun_rl;
7373 bool inject_now;
7374
7375 scsi_set_resid(scp, 0);
7376 if (sdebug_statistics) {
7377 atomic_inc(&sdebug_cmnd_count);
7378 inject_now = inject_on_this_cmd();
7379 } else {
7380 inject_now = false;
7381 }
7382 if (unlikely(sdebug_verbose &&
7383 !(SDEBUG_OPT_NO_CDB_NOISE & sdebug_opts))) {
7384 char b[120];
7385 int n, len, sb;
7386
7387 len = scp->cmd_len;
7388 sb = (int)sizeof(b);
7389 if (len > 32)
7390 strcpy(b, "too long, over 32 bytes");
7391 else {
7392 for (k = 0, n = 0; k < len && n < sb; ++k)
7393 n += scnprintf(b + n, sb - n, "%02x ",
7394 (u32)cmd[k]);
7395 }
7396 sdev_printk(KERN_INFO, sdp, "%s: tag=%#x, cmd %s\n", my_name,
7397 blk_mq_unique_tag(scp->request), b);
7398 }
7399 if (unlikely(inject_now && (sdebug_opts & SDEBUG_OPT_HOST_BUSY)))
7400 return SCSI_MLQUEUE_HOST_BUSY;
7401 has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS);
7402 if (unlikely(lun_index >= sdebug_max_luns && !has_wlun_rl))
7403 goto err_out;
7404
7405 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */
7406 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */
7407 devip = (struct sdebug_dev_info *)sdp->hostdata;
7408 if (unlikely(!devip)) {
7409 devip = find_build_dev_info(sdp);
7410 if (NULL == devip)
7411 goto err_out;
7412 }
7413 if (unlikely(inject_now && !atomic_read(&sdeb_inject_pending)))
7414 atomic_set(&sdeb_inject_pending, 1);
7415
7416 na = oip->num_attached;
7417 r_pfp = oip->pfp;
7418 if (na) { /* multiple commands with this opcode */
7419 r_oip = oip;
7420 if (FF_SA & r_oip->flags) {
7421 if (F_SA_LOW & oip->flags)
7422 sa = 0x1f & cmd[1];
7423 else
7424 sa = get_unaligned_be16(cmd + 8);
7425 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
7426 if (opcode == oip->opcode && sa == oip->sa)
7427 break;
7428 }
7429 } else { /* since no service action only check opcode */
7430 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
7431 if (opcode == oip->opcode)
7432 break;
7433 }
7434 }
7435 if (k > na) {
7436 if (F_SA_LOW & r_oip->flags)
7437 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4);
7438 else if (F_SA_HIGH & r_oip->flags)
7439 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7);
7440 else
7441 mk_sense_invalid_opcode(scp);
7442 goto check_cond;
7443 }
7444 } /* else (when na==0) we assume the oip is a match */
7445 flags = oip->flags;
7446 if (unlikely(F_INV_OP & flags)) {
7447 mk_sense_invalid_opcode(scp);
7448 goto check_cond;
7449 }
7450 if (unlikely(has_wlun_rl && !(F_RL_WLUN_OK & flags))) {
7451 if (sdebug_verbose)
7452 sdev_printk(KERN_INFO, sdp, "%s: Opcode 0x%x not%s\n",
7453 my_name, opcode, " supported for wlun");
7454 mk_sense_invalid_opcode(scp);
7455 goto check_cond;
7456 }
7457 if (unlikely(sdebug_strict)) { /* check cdb against mask */
7458 u8 rem;
7459 int j;
7460
7461 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) {
7462 rem = ~oip->len_mask[k] & cmd[k];
7463 if (rem) {
7464 for (j = 7; j >= 0; --j, rem <<= 1) {
7465 if (0x80 & rem)
7466 break;
7467 }
7468 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j);
7469 goto check_cond;
7470 }
7471 }
7472 }
7473 if (unlikely(!(F_SKIP_UA & flags) &&
7474 find_first_bit(devip->uas_bm,
7475 SDEBUG_NUM_UAS) != SDEBUG_NUM_UAS)) {
7476 errsts = make_ua(scp, devip);
7477 if (errsts)
7478 goto check_cond;
7479 }
7480 if (unlikely(((F_M_ACCESS & flags) || scp->cmnd[0] == TEST_UNIT_READY) &&
7481 atomic_read(&devip->stopped))) {
7482 errsts = resp_not_ready(scp, devip);
7483 if (errsts)
7484 goto fini;
7485 }
7486 if (sdebug_fake_rw && (F_FAKE_RW & flags))
7487 goto fini;
7488 if (unlikely(sdebug_every_nth)) {
7489 if (fake_timeout(scp))
7490 return 0; /* ignore command: make trouble */
7491 }
7492 if (likely(oip->pfp))
7493 pfp = oip->pfp; /* calls a resp_* function */
7494 else
7495 pfp = r_pfp; /* if leaf function ptr NULL, try the root's */
7496
7497fini:
7498 if (F_DELAY_OVERR & flags) /* cmds like INQUIRY respond asap */
7499 return schedule_resp(scp, devip, errsts, pfp, 0, 0);
7500 else if ((flags & F_LONG_DELAY) && (sdebug_jdelay > 0 ||
7501 sdebug_ndelay > 10000)) {
7502 /*
7503 * Skip long delays if ndelay <= 10 microseconds. Otherwise
7504 * for Start Stop Unit (SSU) want at least 1 second delay and
7505 * if sdebug_jdelay>1 want a long delay of that many seconds.
7506 * For Synchronize Cache want 1/20 of SSU's delay.
7507 */
7508 int jdelay = (sdebug_jdelay < 2) ? 1 : sdebug_jdelay;
7509 int denom = (flags & F_SYNC_DELAY) ? 20 : 1;
7510
7511 jdelay = mult_frac(USER_HZ * jdelay, HZ, denom * USER_HZ);
7512 return schedule_resp(scp, devip, errsts, pfp, jdelay, 0);
7513 } else
7514 return schedule_resp(scp, devip, errsts, pfp, sdebug_jdelay,
7515 sdebug_ndelay);
7516check_cond:
7517 return schedule_resp(scp, devip, check_condition_result, NULL, 0, 0);
7518err_out:
7519 return schedule_resp(scp, NULL, DID_NO_CONNECT << 16, NULL, 0, 0);
7520}
7521
7522static struct scsi_host_template sdebug_driver_template = {
7523 .show_info = scsi_debug_show_info,
7524 .write_info = scsi_debug_write_info,
7525 .proc_name = sdebug_proc_name,
7526 .name = "SCSI DEBUG",
7527 .info = scsi_debug_info,
7528 .slave_alloc = scsi_debug_slave_alloc,
7529 .slave_configure = scsi_debug_slave_configure,
7530 .slave_destroy = scsi_debug_slave_destroy,
7531 .ioctl = scsi_debug_ioctl,
7532 .queuecommand = scsi_debug_queuecommand,
7533 .change_queue_depth = sdebug_change_qdepth,
7534 .map_queues = sdebug_map_queues,
7535 .mq_poll = sdebug_blk_mq_poll,
7536 .eh_abort_handler = scsi_debug_abort,
7537 .eh_device_reset_handler = scsi_debug_device_reset,
7538 .eh_target_reset_handler = scsi_debug_target_reset,
7539 .eh_bus_reset_handler = scsi_debug_bus_reset,
7540 .eh_host_reset_handler = scsi_debug_host_reset,
7541 .can_queue = SDEBUG_CANQUEUE,
7542 .this_id = 7,
7543 .sg_tablesize = SG_MAX_SEGMENTS,
7544 .cmd_per_lun = DEF_CMD_PER_LUN,
7545 .max_sectors = -1U,
7546 .max_segment_size = -1U,
7547 .module = THIS_MODULE,
7548 .track_queue_depth = 1,
7549};
7550
7551static int sdebug_driver_probe(struct device *dev)
7552{
7553 int error = 0;
7554 struct sdebug_host_info *sdbg_host;
7555 struct Scsi_Host *hpnt;
7556 int hprot;
7557
7558 sdbg_host = to_sdebug_host(dev);
7559
7560 sdebug_driver_template.can_queue = sdebug_max_queue;
7561 sdebug_driver_template.cmd_per_lun = sdebug_max_queue;
7562 if (!sdebug_clustering)
7563 sdebug_driver_template.dma_boundary = PAGE_SIZE - 1;
7564
7565 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
7566 if (NULL == hpnt) {
7567 pr_err("scsi_host_alloc failed\n");
7568 error = -ENODEV;
7569 return error;
7570 }
7571 if (submit_queues > nr_cpu_ids) {
7572 pr_warn("%s: trim submit_queues (was %d) to nr_cpu_ids=%u\n",
7573 my_name, submit_queues, nr_cpu_ids);
7574 submit_queues = nr_cpu_ids;
7575 }
7576 /*
7577 * Decide whether to tell scsi subsystem that we want mq. The
7578 * following should give the same answer for each host.
7579 */
7580 hpnt->nr_hw_queues = submit_queues;
7581 if (sdebug_host_max_queue)
7582 hpnt->host_tagset = 1;
7583
7584 /* poll queues are possible for nr_hw_queues > 1 */
7585 if (hpnt->nr_hw_queues == 1 || (poll_queues < 1)) {
7586 pr_warn("%s: trim poll_queues to 0. poll_q/nr_hw = (%d/%d)\n",
7587 my_name, poll_queues, hpnt->nr_hw_queues);
7588 poll_queues = 0;
7589 }
7590
7591 /*
7592 * Poll queues don't need interrupts, but we need at least one I/O queue
7593 * left over for non-polled I/O.
7594 * If condition not met, trim poll_queues to 1 (just for simplicity).
7595 */
7596 if (poll_queues >= submit_queues) {
7597 if (submit_queues < 3)
7598 pr_warn("%s: trim poll_queues to 1\n", my_name);
7599 else
7600 pr_warn("%s: trim poll_queues to 1. Perhaps try poll_queues=%d\n",
7601 my_name, submit_queues - 1);
7602 poll_queues = 1;
7603 }
7604 if (poll_queues)
7605 hpnt->nr_maps = 3;
7606
7607 sdbg_host->shost = hpnt;
7608 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
7609 if ((hpnt->this_id >= 0) && (sdebug_num_tgts > hpnt->this_id))
7610 hpnt->max_id = sdebug_num_tgts + 1;
7611 else
7612 hpnt->max_id = sdebug_num_tgts;
7613 /* = sdebug_max_luns; */
7614 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
7615
7616 hprot = 0;
7617
7618 switch (sdebug_dif) {
7619
7620 case T10_PI_TYPE1_PROTECTION:
7621 hprot = SHOST_DIF_TYPE1_PROTECTION;
7622 if (sdebug_dix)
7623 hprot |= SHOST_DIX_TYPE1_PROTECTION;
7624 break;
7625
7626 case T10_PI_TYPE2_PROTECTION:
7627 hprot = SHOST_DIF_TYPE2_PROTECTION;
7628 if (sdebug_dix)
7629 hprot |= SHOST_DIX_TYPE2_PROTECTION;
7630 break;
7631
7632 case T10_PI_TYPE3_PROTECTION:
7633 hprot = SHOST_DIF_TYPE3_PROTECTION;
7634 if (sdebug_dix)
7635 hprot |= SHOST_DIX_TYPE3_PROTECTION;
7636 break;
7637
7638 default:
7639 if (sdebug_dix)
7640 hprot |= SHOST_DIX_TYPE0_PROTECTION;
7641 break;
7642 }
7643
7644 scsi_host_set_prot(hpnt, hprot);
7645
7646 if (have_dif_prot || sdebug_dix)
7647 pr_info("host protection%s%s%s%s%s%s%s\n",
7648 (hprot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
7649 (hprot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
7650 (hprot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
7651 (hprot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
7652 (hprot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
7653 (hprot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
7654 (hprot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
7655
7656 if (sdebug_guard == 1)
7657 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
7658 else
7659 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
7660
7661 sdebug_verbose = !!(SDEBUG_OPT_NOISE & sdebug_opts);
7662 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & sdebug_opts);
7663 if (sdebug_every_nth) /* need stats counters for every_nth */
7664 sdebug_statistics = true;
7665 error = scsi_add_host(hpnt, &sdbg_host->dev);
7666 if (error) {
7667 pr_err("scsi_add_host failed\n");
7668 error = -ENODEV;
7669 scsi_host_put(hpnt);
7670 } else {
7671 scsi_scan_host(hpnt);
7672 }
7673
7674 return error;
7675}
7676
7677static int sdebug_driver_remove(struct device *dev)
7678{
7679 struct sdebug_host_info *sdbg_host;
7680 struct sdebug_dev_info *sdbg_devinfo, *tmp;
7681
7682 sdbg_host = to_sdebug_host(dev);
7683
7684 scsi_remove_host(sdbg_host->shost);
7685
7686 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
7687 dev_list) {
7688 list_del(&sdbg_devinfo->dev_list);
7689 kfree(sdbg_devinfo->zstate);
7690 kfree(sdbg_devinfo);
7691 }
7692
7693 scsi_host_put(sdbg_host->shost);
7694 return 0;
7695}
7696
7697static int pseudo_lld_bus_match(struct device *dev,
7698 struct device_driver *dev_driver)
7699{
7700 return 1;
7701}
7702
7703static struct bus_type pseudo_lld_bus = {
7704 .name = "pseudo",
7705 .match = pseudo_lld_bus_match,
7706 .probe = sdebug_driver_probe,
7707 .remove = sdebug_driver_remove,
7708 .drv_groups = sdebug_drv_groups,
7709};