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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 - 2021 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#include <linux/align.h>
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/fs.h>
27#include <linux/init.h>
28#include <linux/proc_fs.h>
29#include <linux/vmalloc.h>
30#include <linux/moduleparam.h>
31#include <linux/scatterlist.h>
32#include <linux/blkdev.h>
33#include <linux/crc-t10dif.h>
34#include <linux/spinlock.h>
35#include <linux/interrupt.h>
36#include <linux/atomic.h>
37#include <linux/hrtimer.h>
38#include <linux/uuid.h>
39#include <linux/t10-pi.h>
40#include <linux/msdos_partition.h>
41#include <linux/random.h>
42#include <linux/xarray.h>
43#include <linux/prefetch.h>
44
45#include <net/checksum.h>
46
47#include <asm/unaligned.h>
48
49#include <scsi/scsi.h>
50#include <scsi/scsi_cmnd.h>
51#include <scsi/scsi_device.h>
52#include <scsi/scsi_host.h>
53#include <scsi/scsicam.h>
54#include <scsi/scsi_eh.h>
55#include <scsi/scsi_tcq.h>
56#include <scsi/scsi_dbg.h>
57
58#include "sd.h"
59#include "scsi_logging.h"
60
61/* make sure inq_product_rev string corresponds to this version */
62#define SDEBUG_VERSION "0191" /* format to fit INQUIRY revision field */
63static const char *sdebug_version_date = "20210520";
64
65#define MY_NAME "scsi_debug"
66
67/* Additional Sense Code (ASC) */
68#define NO_ADDITIONAL_SENSE 0x0
69#define LOGICAL_UNIT_NOT_READY 0x4
70#define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
71#define UNRECOVERED_READ_ERR 0x11
72#define PARAMETER_LIST_LENGTH_ERR 0x1a
73#define INVALID_OPCODE 0x20
74#define LBA_OUT_OF_RANGE 0x21
75#define INVALID_FIELD_IN_CDB 0x24
76#define INVALID_FIELD_IN_PARAM_LIST 0x26
77#define WRITE_PROTECTED 0x27
78#define UA_RESET_ASC 0x29
79#define UA_CHANGED_ASC 0x2a
80#define TARGET_CHANGED_ASC 0x3f
81#define LUNS_CHANGED_ASCQ 0x0e
82#define INSUFF_RES_ASC 0x55
83#define INSUFF_RES_ASCQ 0x3
84#define POWER_ON_RESET_ASCQ 0x0
85#define POWER_ON_OCCURRED_ASCQ 0x1
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 ATTEMPT_ACCESS_GAP 0x9
102#define INSUFF_ZONE_ASCQ 0xe
103
104/* Additional Sense Code Qualifier (ASCQ) */
105#define ACK_NAK_TO 0x3
106
107/* Default values for driver parameters */
108#define DEF_NUM_HOST 1
109#define DEF_NUM_TGTS 1
110#define DEF_MAX_LUNS 1
111/* With these defaults, this driver will make 1 host with 1 target
112 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
113 */
114#define DEF_ATO 1
115#define DEF_CDB_LEN 10
116#define DEF_JDELAY 1 /* if > 0 unit is a jiffy */
117#define DEF_DEV_SIZE_PRE_INIT 0
118#define DEF_DEV_SIZE_MB 8
119#define DEF_ZBC_DEV_SIZE_MB 128
120#define DEF_DIF 0
121#define DEF_DIX 0
122#define DEF_PER_HOST_STORE false
123#define DEF_D_SENSE 0
124#define DEF_EVERY_NTH 0
125#define DEF_FAKE_RW 0
126#define DEF_GUARD 0
127#define DEF_HOST_LOCK 0
128#define DEF_LBPU 0
129#define DEF_LBPWS 0
130#define DEF_LBPWS10 0
131#define DEF_LBPRZ 1
132#define DEF_LOWEST_ALIGNED 0
133#define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */
134#define DEF_NO_LUN_0 0
135#define DEF_NUM_PARTS 0
136#define DEF_OPTS 0
137#define DEF_OPT_BLKS 1024
138#define DEF_PHYSBLK_EXP 0
139#define DEF_OPT_XFERLEN_EXP 0
140#define DEF_PTYPE TYPE_DISK
141#define DEF_RANDOM false
142#define DEF_REMOVABLE false
143#define DEF_SCSI_LEVEL 7 /* INQUIRY, byte2 [6->SPC-4; 7->SPC-5] */
144#define DEF_SECTOR_SIZE 512
145#define DEF_UNMAP_ALIGNMENT 0
146#define DEF_UNMAP_GRANULARITY 1
147#define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
148#define DEF_UNMAP_MAX_DESC 256
149#define DEF_VIRTUAL_GB 0
150#define DEF_VPD_USE_HOSTNO 1
151#define DEF_WRITESAME_LENGTH 0xFFFF
152#define DEF_STRICT 0
153#define DEF_STATISTICS false
154#define DEF_SUBMIT_QUEUES 1
155#define DEF_TUR_MS_TO_READY 0
156#define DEF_UUID_CTL 0
157#define JDELAY_OVERRIDDEN -9999
158
159/* Default parameters for ZBC drives */
160#define DEF_ZBC_ZONE_SIZE_MB 128
161#define DEF_ZBC_MAX_OPEN_ZONES 8
162#define DEF_ZBC_NR_CONV_ZONES 1
163
164#define SDEBUG_LUN_0_VAL 0
165
166/* bit mask values for sdebug_opts */
167#define SDEBUG_OPT_NOISE 1
168#define SDEBUG_OPT_MEDIUM_ERR 2
169#define SDEBUG_OPT_TIMEOUT 4
170#define SDEBUG_OPT_RECOVERED_ERR 8
171#define SDEBUG_OPT_TRANSPORT_ERR 16
172#define SDEBUG_OPT_DIF_ERR 32
173#define SDEBUG_OPT_DIX_ERR 64
174#define SDEBUG_OPT_MAC_TIMEOUT 128
175#define SDEBUG_OPT_SHORT_TRANSFER 0x100
176#define SDEBUG_OPT_Q_NOISE 0x200
177#define SDEBUG_OPT_ALL_TSF 0x400 /* ignore */
178#define SDEBUG_OPT_RARE_TSF 0x800
179#define SDEBUG_OPT_N_WCE 0x1000
180#define SDEBUG_OPT_RESET_NOISE 0x2000
181#define SDEBUG_OPT_NO_CDB_NOISE 0x4000
182#define SDEBUG_OPT_HOST_BUSY 0x8000
183#define SDEBUG_OPT_CMD_ABORT 0x10000
184#define SDEBUG_OPT_ALL_NOISE (SDEBUG_OPT_NOISE | SDEBUG_OPT_Q_NOISE | \
185 SDEBUG_OPT_RESET_NOISE)
186#define SDEBUG_OPT_ALL_INJECTING (SDEBUG_OPT_RECOVERED_ERR | \
187 SDEBUG_OPT_TRANSPORT_ERR | \
188 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR | \
189 SDEBUG_OPT_SHORT_TRANSFER | \
190 SDEBUG_OPT_HOST_BUSY | \
191 SDEBUG_OPT_CMD_ABORT)
192#define SDEBUG_OPT_RECOV_DIF_DIX (SDEBUG_OPT_RECOVERED_ERR | \
193 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR)
194
195/* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs) are returned in
196 * priority order. In the subset implemented here lower numbers have higher
197 * priority. The UA numbers should be a sequence starting from 0 with
198 * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */
199#define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */
200#define SDEBUG_UA_POOCCUR 1 /* Power on occurred */
201#define SDEBUG_UA_BUS_RESET 2
202#define SDEBUG_UA_MODE_CHANGED 3
203#define SDEBUG_UA_CAPACITY_CHANGED 4
204#define SDEBUG_UA_LUNS_CHANGED 5
205#define SDEBUG_UA_MICROCODE_CHANGED 6 /* simulate firmware change */
206#define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 7
207#define SDEBUG_NUM_UAS 8
208
209/* when 1==SDEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
210 * sector on read commands: */
211#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
212#define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
213
214/* SDEBUG_CANQUEUE is the maximum number of commands that can be queued
215 * (for response) per submit queue at one time. Can be reduced by max_queue
216 * option. Command responses are not queued when jdelay=0 and ndelay=0. The
217 * per-device DEF_CMD_PER_LUN can be changed via sysfs:
218 * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth
219 * but cannot exceed SDEBUG_CANQUEUE .
220 */
221#define SDEBUG_CANQUEUE_WORDS 3 /* a WORD is bits in a long */
222#define SDEBUG_CANQUEUE (SDEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
223#define DEF_CMD_PER_LUN SDEBUG_CANQUEUE
224
225/* UA - Unit Attention; SA - Service Action; SSU - Start Stop Unit */
226#define F_D_IN 1 /* Data-in command (e.g. READ) */
227#define F_D_OUT 2 /* Data-out command (e.g. WRITE) */
228#define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */
229#define F_D_UNKN 8
230#define F_RL_WLUN_OK 0x10 /* allowed with REPORT LUNS W-LUN */
231#define F_SKIP_UA 0x20 /* bypass UAs (e.g. INQUIRY command) */
232#define F_DELAY_OVERR 0x40 /* for commands like INQUIRY */
233#define F_SA_LOW 0x80 /* SA is in cdb byte 1, bits 4 to 0 */
234#define F_SA_HIGH 0x100 /* SA is in cdb bytes 8 and 9 */
235#define F_INV_OP 0x200 /* invalid opcode (not supported) */
236#define F_FAKE_RW 0x400 /* bypass resp_*() when fake_rw set */
237#define F_M_ACCESS 0x800 /* media access, reacts to SSU state */
238#define F_SSU_DELAY 0x1000 /* SSU command delay (long-ish) */
239#define F_SYNC_DELAY 0x2000 /* SYNCHRONIZE CACHE delay */
240
241/* Useful combinations of the above flags */
242#define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR)
243#define FF_MEDIA_IO (F_M_ACCESS | F_FAKE_RW)
244#define FF_SA (F_SA_HIGH | F_SA_LOW)
245#define F_LONG_DELAY (F_SSU_DELAY | F_SYNC_DELAY)
246
247#define SDEBUG_MAX_PARTS 4
248
249#define SDEBUG_MAX_CMD_LEN 32
250
251#define SDEB_XA_NOT_IN_USE XA_MARK_1
252
253/* Zone types (zbcr05 table 25) */
254enum sdebug_z_type {
255 ZBC_ZTYPE_CNV = 0x1,
256 ZBC_ZTYPE_SWR = 0x2,
257 ZBC_ZTYPE_SWP = 0x3,
258 /* ZBC_ZTYPE_SOBR = 0x4, */
259 ZBC_ZTYPE_GAP = 0x5,
260};
261
262/* enumeration names taken from table 26, zbcr05 */
263enum sdebug_z_cond {
264 ZBC_NOT_WRITE_POINTER = 0x0,
265 ZC1_EMPTY = 0x1,
266 ZC2_IMPLICIT_OPEN = 0x2,
267 ZC3_EXPLICIT_OPEN = 0x3,
268 ZC4_CLOSED = 0x4,
269 ZC6_READ_ONLY = 0xd,
270 ZC5_FULL = 0xe,
271 ZC7_OFFLINE = 0xf,
272};
273
274struct sdeb_zone_state { /* ZBC: per zone state */
275 enum sdebug_z_type z_type;
276 enum sdebug_z_cond z_cond;
277 bool z_non_seq_resource;
278 unsigned int z_size;
279 sector_t z_start;
280 sector_t z_wp;
281};
282
283struct sdebug_dev_info {
284 struct list_head dev_list;
285 unsigned int channel;
286 unsigned int target;
287 u64 lun;
288 uuid_t lu_name;
289 struct sdebug_host_info *sdbg_host;
290 unsigned long uas_bm[1];
291 atomic_t num_in_q;
292 atomic_t stopped; /* 1: by SSU, 2: device start */
293 bool used;
294
295 /* For ZBC devices */
296 enum blk_zoned_model zmodel;
297 unsigned int zcap;
298 unsigned int zsize;
299 unsigned int zsize_shift;
300 unsigned int nr_zones;
301 unsigned int nr_conv_zones;
302 unsigned int nr_seq_zones;
303 unsigned int nr_imp_open;
304 unsigned int nr_exp_open;
305 unsigned int nr_closed;
306 unsigned int max_open;
307 ktime_t create_ts; /* time since bootup that this device was created */
308 struct sdeb_zone_state *zstate;
309};
310
311struct sdebug_host_info {
312 struct list_head host_list;
313 int si_idx; /* sdeb_store_info (per host) xarray index */
314 struct Scsi_Host *shost;
315 struct device dev;
316 struct list_head dev_info_list;
317};
318
319/* There is an xarray of pointers to this struct's objects, one per host */
320struct sdeb_store_info {
321 rwlock_t macc_lck; /* for atomic media access on this store */
322 u8 *storep; /* user data storage (ram) */
323 struct t10_pi_tuple *dif_storep; /* protection info */
324 void *map_storep; /* provisioning map */
325};
326
327#define to_sdebug_host(d) \
328 container_of(d, struct sdebug_host_info, dev)
329
330enum sdeb_defer_type {SDEB_DEFER_NONE = 0, SDEB_DEFER_HRT = 1,
331 SDEB_DEFER_WQ = 2, SDEB_DEFER_POLL = 3};
332
333struct sdebug_defer {
334 struct hrtimer hrt;
335 struct execute_work ew;
336 ktime_t cmpl_ts;/* time since boot to complete this cmd */
337 int sqa_idx; /* index of sdebug_queue array */
338 int qc_idx; /* index of sdebug_queued_cmd array within sqa_idx */
339 int hc_idx; /* hostwide tag index */
340 int issuing_cpu;
341 bool init_hrt;
342 bool init_wq;
343 bool init_poll;
344 bool aborted; /* true when blk_abort_request() already called */
345 enum sdeb_defer_type defer_t;
346};
347
348struct sdebug_queued_cmd {
349 /* corresponding bit set in in_use_bm[] in owning struct sdebug_queue
350 * instance indicates this slot is in use.
351 */
352 struct sdebug_defer *sd_dp;
353 struct scsi_cmnd *a_cmnd;
354};
355
356struct sdebug_queue {
357 struct sdebug_queued_cmd qc_arr[SDEBUG_CANQUEUE];
358 unsigned long in_use_bm[SDEBUG_CANQUEUE_WORDS];
359 spinlock_t qc_lock;
360 atomic_t blocked; /* to temporarily stop more being queued */
361};
362
363static atomic_t sdebug_cmnd_count; /* number of incoming commands */
364static atomic_t sdebug_completions; /* count of deferred completions */
365static atomic_t sdebug_miss_cpus; /* submission + completion cpus differ */
366static atomic_t sdebug_a_tsf; /* 'almost task set full' counter */
367static atomic_t sdeb_inject_pending;
368static atomic_t sdeb_mq_poll_count; /* bumped when mq_poll returns > 0 */
369
370struct opcode_info_t {
371 u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff */
372 /* for terminating element */
373 u8 opcode; /* if num_attached > 0, preferred */
374 u16 sa; /* service action */
375 u32 flags; /* OR-ed set of SDEB_F_* */
376 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
377 const struct opcode_info_t *arrp; /* num_attached elements or NULL */
378 u8 len_mask[16]; /* len_mask[0]-->cdb_len, then mask for cdb */
379 /* 1 to min(cdb_len, 15); ignore cdb[15...] */
380};
381
382/* SCSI opcodes (first byte of cdb) of interest mapped onto these indexes */
383enum sdeb_opcode_index {
384 SDEB_I_INVALID_OPCODE = 0,
385 SDEB_I_INQUIRY = 1,
386 SDEB_I_REPORT_LUNS = 2,
387 SDEB_I_REQUEST_SENSE = 3,
388 SDEB_I_TEST_UNIT_READY = 4,
389 SDEB_I_MODE_SENSE = 5, /* 6, 10 */
390 SDEB_I_MODE_SELECT = 6, /* 6, 10 */
391 SDEB_I_LOG_SENSE = 7,
392 SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */
393 SDEB_I_READ = 9, /* 6, 10, 12, 16 */
394 SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */
395 SDEB_I_START_STOP = 11,
396 SDEB_I_SERV_ACT_IN_16 = 12, /* add ...SERV_ACT_IN_12 if needed */
397 SDEB_I_SERV_ACT_OUT_16 = 13, /* add ...SERV_ACT_OUT_12 if needed */
398 SDEB_I_MAINT_IN = 14,
399 SDEB_I_MAINT_OUT = 15,
400 SDEB_I_VERIFY = 16, /* VERIFY(10), VERIFY(16) */
401 SDEB_I_VARIABLE_LEN = 17, /* READ(32), WRITE(32), WR_SCAT(32) */
402 SDEB_I_RESERVE = 18, /* 6, 10 */
403 SDEB_I_RELEASE = 19, /* 6, 10 */
404 SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
405 SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */
406 SDEB_I_ATA_PT = 22, /* 12, 16 */
407 SDEB_I_SEND_DIAG = 23,
408 SDEB_I_UNMAP = 24,
409 SDEB_I_WRITE_BUFFER = 25,
410 SDEB_I_WRITE_SAME = 26, /* 10, 16 */
411 SDEB_I_SYNC_CACHE = 27, /* 10, 16 */
412 SDEB_I_COMP_WRITE = 28,
413 SDEB_I_PRE_FETCH = 29, /* 10, 16 */
414 SDEB_I_ZONE_OUT = 30, /* 0x94+SA; includes no data xfer */
415 SDEB_I_ZONE_IN = 31, /* 0x95+SA; all have data-in */
416 SDEB_I_LAST_ELEM_P1 = 32, /* keep this last (previous + 1) */
417};
418
419
420static const unsigned char opcode_ind_arr[256] = {
421/* 0x0; 0x0->0x1f: 6 byte cdbs */
422 SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE,
423 0, 0, 0, 0,
424 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0,
425 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
426 SDEB_I_RELEASE,
427 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG,
428 SDEB_I_ALLOW_REMOVAL, 0,
429/* 0x20; 0x20->0x3f: 10 byte cdbs */
430 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0,
431 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY,
432 0, 0, 0, 0, SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, 0,
433 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0,
434/* 0x40; 0x40->0x5f: 10 byte cdbs */
435 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0,
436 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0,
437 0, 0, 0, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
438 SDEB_I_RELEASE,
439 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0,
440/* 0x60; 0x60->0x7d are reserved, 0x7e is "extended cdb" */
441 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
442 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
443 0, SDEB_I_VARIABLE_LEN,
444/* 0x80; 0x80->0x9f: 16 byte cdbs */
445 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0,
446 SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0,
447 0, 0, 0, SDEB_I_VERIFY,
448 SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, SDEB_I_WRITE_SAME,
449 SDEB_I_ZONE_OUT, SDEB_I_ZONE_IN, 0, 0,
450 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN_16, SDEB_I_SERV_ACT_OUT_16,
451/* 0xa0; 0xa0->0xbf: 12 byte cdbs */
452 SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN,
453 SDEB_I_MAINT_OUT, 0, 0, 0,
454 SDEB_I_READ, 0 /* SDEB_I_SERV_ACT_OUT_12 */, SDEB_I_WRITE,
455 0 /* SDEB_I_SERV_ACT_IN_12 */, 0, 0, 0, 0,
456 0, 0, 0, 0, 0, 0, 0, 0,
457 0, 0, 0, 0, 0, 0, 0, 0,
458/* 0xc0; 0xc0->0xff: vendor specific */
459 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
460 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
461 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
462 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
463};
464
465/*
466 * The following "response" functions return the SCSI mid-level's 4 byte
467 * tuple-in-an-int. To handle commands with an IMMED bit, for a faster
468 * command completion, they can mask their return value with
469 * SDEG_RES_IMMED_MASK .
470 */
471#define SDEG_RES_IMMED_MASK 0x40000000
472
473static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *);
474static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *);
475static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *);
476static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
477static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *);
478static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
479static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
480static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
481static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
482static int resp_write_scat(struct scsi_cmnd *, struct sdebug_dev_info *);
483static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
484static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
485static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
486static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *);
487static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *);
488static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *);
489static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *);
490static int resp_verify(struct scsi_cmnd *, struct sdebug_dev_info *);
491static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *);
492static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *);
493static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
494static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *);
495static int resp_sync_cache(struct scsi_cmnd *, struct sdebug_dev_info *);
496static int resp_pre_fetch(struct scsi_cmnd *, struct sdebug_dev_info *);
497static int resp_report_zones(struct scsi_cmnd *, struct sdebug_dev_info *);
498static int resp_open_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
499static int resp_close_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
500static int resp_finish_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
501static int resp_rwp_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
502
503static int sdebug_do_add_host(bool mk_new_store);
504static int sdebug_add_host_helper(int per_host_idx);
505static void sdebug_do_remove_host(bool the_end);
506static int sdebug_add_store(void);
507static void sdebug_erase_store(int idx, struct sdeb_store_info *sip);
508static void sdebug_erase_all_stores(bool apart_from_first);
509
510/*
511 * The following are overflow arrays for cdbs that "hit" the same index in
512 * the opcode_info_arr array. The most time sensitive (or commonly used) cdb
513 * should be placed in opcode_info_arr[], the others should be placed here.
514 */
515static const struct opcode_info_t msense_iarr[] = {
516 {0, 0x1a, 0, F_D_IN, NULL, NULL,
517 {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
518};
519
520static const struct opcode_info_t mselect_iarr[] = {
521 {0, 0x15, 0, F_D_OUT, NULL, NULL,
522 {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
523};
524
525static const struct opcode_info_t read_iarr[] = {
526 {0, 0x28, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(10) */
527 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
528 0, 0, 0, 0} },
529 {0, 0x8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL, /* READ(6) */
530 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
531 {0, 0xa8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(12) */
532 {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf,
533 0xc7, 0, 0, 0, 0} },
534};
535
536static const struct opcode_info_t write_iarr[] = {
537 {0, 0x2a, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(10) */
538 NULL, {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7,
539 0, 0, 0, 0, 0, 0} },
540 {0, 0xa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(6) */
541 NULL, {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0,
542 0, 0, 0} },
543 {0, 0xaa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(12) */
544 NULL, {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
545 0xbf, 0xc7, 0, 0, 0, 0} },
546};
547
548static const struct opcode_info_t verify_iarr[] = {
549 {0, 0x2f, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify,/* VERIFY(10) */
550 NULL, {10, 0xf7, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xff, 0xff, 0xc7,
551 0, 0, 0, 0, 0, 0} },
552};
553
554static const struct opcode_info_t sa_in_16_iarr[] = {
555 {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL,
556 {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
557 0xff, 0xff, 0xff, 0, 0xc7} }, /* GET LBA STATUS(16) */
558};
559
560static const struct opcode_info_t vl_iarr[] = { /* VARIABLE LENGTH */
561 {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_dt0,
562 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0xb, 0xfa,
563 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
564 {0, 0x7f, 0x11, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
565 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x11, 0xf8,
566 0, 0xff, 0xff, 0x0, 0x0} }, /* WRITE SCATTERED(32) */
567};
568
569static const struct opcode_info_t maint_in_iarr[] = { /* MAINT IN */
570 {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL,
571 {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
572 0xc7, 0, 0, 0, 0} }, /* REPORT SUPPORTED OPERATION CODES */
573 {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL,
574 {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
575 0, 0} }, /* REPORTED SUPPORTED TASK MANAGEMENT FUNCTIONS */
576};
577
578static const struct opcode_info_t write_same_iarr[] = {
579 {0, 0x93, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_write_same_16, NULL,
580 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
581 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* WRITE SAME(16) */
582};
583
584static const struct opcode_info_t reserve_iarr[] = {
585 {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */
586 {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
587};
588
589static const struct opcode_info_t release_iarr[] = {
590 {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */
591 {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
592};
593
594static const struct opcode_info_t sync_cache_iarr[] = {
595 {0, 0x91, 0, F_SYNC_DELAY | F_M_ACCESS, resp_sync_cache, NULL,
596 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
597 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* SYNC_CACHE (16) */
598};
599
600static const struct opcode_info_t pre_fetch_iarr[] = {
601 {0, 0x90, 0, F_SYNC_DELAY | FF_MEDIA_IO, resp_pre_fetch, NULL,
602 {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
603 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* PRE-FETCH (16) */
604};
605
606static const struct opcode_info_t zone_out_iarr[] = { /* ZONE OUT(16) */
607 {0, 0x94, 0x1, F_SA_LOW | F_M_ACCESS, resp_close_zone, NULL,
608 {16, 0x1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
609 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* CLOSE ZONE */
610 {0, 0x94, 0x2, F_SA_LOW | F_M_ACCESS, resp_finish_zone, NULL,
611 {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
612 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* FINISH ZONE */
613 {0, 0x94, 0x4, F_SA_LOW | F_M_ACCESS, resp_rwp_zone, NULL,
614 {16, 0x4, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
615 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* RESET WRITE POINTER */
616};
617
618static const struct opcode_info_t zone_in_iarr[] = { /* ZONE IN(16) */
619 {0, 0x95, 0x6, F_SA_LOW | F_D_IN | F_M_ACCESS, NULL, NULL,
620 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
621 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* REPORT ZONES */
622};
623
624
625/* This array is accessed via SDEB_I_* values. Make sure all are mapped,
626 * plus the terminating elements for logic that scans this table such as
627 * REPORT SUPPORTED OPERATION CODES. */
628static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEM_P1 + 1] = {
629/* 0 */
630 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* unknown opcodes */
631 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
632 {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL, /* INQUIRY */
633 {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
634 {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL,
635 {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
636 0, 0} }, /* REPORT LUNS */
637 {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL,
638 {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
639 {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */
640 {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
641/* 5 */
642 {ARRAY_SIZE(msense_iarr), 0x5a, 0, F_D_IN, /* MODE SENSE(10) */
643 resp_mode_sense, msense_iarr, {10, 0xf8, 0xff, 0xff, 0, 0, 0,
644 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
645 {ARRAY_SIZE(mselect_iarr), 0x55, 0, F_D_OUT, /* MODE SELECT(10) */
646 resp_mode_select, mselect_iarr, {10, 0xf1, 0, 0, 0, 0, 0, 0xff,
647 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
648 {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL, /* LOG SENSE */
649 {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0,
650 0, 0, 0} },
651 {0, 0x25, 0, F_D_IN, resp_readcap, NULL, /* READ CAPACITY(10) */
652 {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0,
653 0, 0} },
654 {ARRAY_SIZE(read_iarr), 0x88, 0, F_D_IN | FF_MEDIA_IO, /* READ(16) */
655 resp_read_dt0, read_iarr, {16, 0xfe, 0xff, 0xff, 0xff, 0xff,
656 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
657/* 10 */
658 {ARRAY_SIZE(write_iarr), 0x8a, 0, F_D_OUT | FF_MEDIA_IO,
659 resp_write_dt0, write_iarr, /* WRITE(16) */
660 {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
661 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
662 {0, 0x1b, 0, F_SSU_DELAY, resp_start_stop, NULL,/* START STOP UNIT */
663 {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
664 {ARRAY_SIZE(sa_in_16_iarr), 0x9e, 0x10, F_SA_LOW | F_D_IN,
665 resp_readcap16, sa_in_16_iarr, /* SA_IN(16), READ CAPACITY(16) */
666 {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
667 0xff, 0xff, 0xff, 0xff, 0x1, 0xc7} },
668 {0, 0x9f, 0x12, F_SA_LOW | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
669 NULL, {16, 0x12, 0xf9, 0x0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff,
670 0xff, 0xff, 0xff, 0xff, 0xc7} }, /* SA_OUT(16), WRITE SCAT(16) */
671 {ARRAY_SIZE(maint_in_iarr), 0xa3, 0xa, F_SA_LOW | F_D_IN,
672 resp_report_tgtpgs, /* MAINT IN, REPORT TARGET PORT GROUPS */
673 maint_in_iarr, {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff,
674 0xff, 0, 0xc7, 0, 0, 0, 0} },
675/* 15 */
676 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */
677 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
678 {ARRAY_SIZE(verify_iarr), 0x8f, 0,
679 F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify, /* VERIFY(16) */
680 verify_iarr, {16, 0xf6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
681 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} },
682 {ARRAY_SIZE(vl_iarr), 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_MEDIA_IO,
683 resp_read_dt0, vl_iarr, /* VARIABLE LENGTH, READ(32) */
684 {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x9, 0xfe, 0, 0xff, 0xff,
685 0xff, 0xff} },
686 {ARRAY_SIZE(reserve_iarr), 0x56, 0, F_D_OUT,
687 NULL, reserve_iarr, /* RESERVE(10) <no response function> */
688 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
689 0} },
690 {ARRAY_SIZE(release_iarr), 0x57, 0, F_D_OUT,
691 NULL, release_iarr, /* RELEASE(10) <no response function> */
692 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
693 0} },
694/* 20 */
695 {0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */
696 {6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
697 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */
698 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
699 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */
700 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
701 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */
702 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
703 {0, 0x42, 0, F_D_OUT | FF_MEDIA_IO, resp_unmap, NULL, /* UNMAP */
704 {10, 0x1, 0, 0, 0, 0, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
705/* 25 */
706 {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL,
707 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0,
708 0, 0, 0, 0} }, /* WRITE_BUFFER */
709 {ARRAY_SIZE(write_same_iarr), 0x41, 0, F_D_OUT_MAYBE | FF_MEDIA_IO,
710 resp_write_same_10, write_same_iarr, /* WRITE SAME(10) */
711 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0,
712 0, 0, 0, 0, 0} },
713 {ARRAY_SIZE(sync_cache_iarr), 0x35, 0, F_SYNC_DELAY | F_M_ACCESS,
714 resp_sync_cache, sync_cache_iarr,
715 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
716 0, 0, 0, 0} }, /* SYNC_CACHE (10) */
717 {0, 0x89, 0, F_D_OUT | FF_MEDIA_IO, resp_comp_write, NULL,
718 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
719 0, 0xff, 0x3f, 0xc7} }, /* COMPARE AND WRITE */
720 {ARRAY_SIZE(pre_fetch_iarr), 0x34, 0, F_SYNC_DELAY | FF_MEDIA_IO,
721 resp_pre_fetch, pre_fetch_iarr,
722 {10, 0x2, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
723 0, 0, 0, 0} }, /* PRE-FETCH (10) */
724
725/* 30 */
726 {ARRAY_SIZE(zone_out_iarr), 0x94, 0x3, F_SA_LOW | F_M_ACCESS,
727 resp_open_zone, zone_out_iarr, /* ZONE_OUT(16), OPEN ZONE) */
728 {16, 0x3 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
729 0xff, 0xff, 0x0, 0x0, 0xff, 0xff, 0x1, 0xc7} },
730 {ARRAY_SIZE(zone_in_iarr), 0x95, 0x0, F_SA_LOW | F_M_ACCESS,
731 resp_report_zones, zone_in_iarr, /* ZONE_IN(16), REPORT ZONES) */
732 {16, 0x0 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
733 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xc7} },
734/* sentinel */
735 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */
736 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
737};
738
739static int sdebug_num_hosts;
740static int sdebug_add_host = DEF_NUM_HOST; /* in sysfs this is relative */
741static int sdebug_ato = DEF_ATO;
742static int sdebug_cdb_len = DEF_CDB_LEN;
743static int sdebug_jdelay = DEF_JDELAY; /* if > 0 then unit is jiffies */
744static int sdebug_dev_size_mb = DEF_DEV_SIZE_PRE_INIT;
745static int sdebug_dif = DEF_DIF;
746static int sdebug_dix = DEF_DIX;
747static int sdebug_dsense = DEF_D_SENSE;
748static int sdebug_every_nth = DEF_EVERY_NTH;
749static int sdebug_fake_rw = DEF_FAKE_RW;
750static unsigned int sdebug_guard = DEF_GUARD;
751static int sdebug_host_max_queue; /* per host */
752static int sdebug_lowest_aligned = DEF_LOWEST_ALIGNED;
753static int sdebug_max_luns = DEF_MAX_LUNS;
754static int sdebug_max_queue = SDEBUG_CANQUEUE; /* per submit queue */
755static unsigned int sdebug_medium_error_start = OPT_MEDIUM_ERR_ADDR;
756static int sdebug_medium_error_count = OPT_MEDIUM_ERR_NUM;
757static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */
758static int sdebug_ndelay = DEF_NDELAY; /* if > 0 then unit is nanoseconds */
759static int sdebug_no_lun_0 = DEF_NO_LUN_0;
760static int sdebug_no_uld;
761static int sdebug_num_parts = DEF_NUM_PARTS;
762static int sdebug_num_tgts = DEF_NUM_TGTS; /* targets per host */
763static int sdebug_opt_blks = DEF_OPT_BLKS;
764static int sdebug_opts = DEF_OPTS;
765static int sdebug_physblk_exp = DEF_PHYSBLK_EXP;
766static int sdebug_opt_xferlen_exp = DEF_OPT_XFERLEN_EXP;
767static int sdebug_ptype = DEF_PTYPE; /* SCSI peripheral device type */
768static int sdebug_scsi_level = DEF_SCSI_LEVEL;
769static int sdebug_sector_size = DEF_SECTOR_SIZE;
770static int sdeb_tur_ms_to_ready = DEF_TUR_MS_TO_READY;
771static int sdebug_virtual_gb = DEF_VIRTUAL_GB;
772static int sdebug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
773static unsigned int sdebug_lbpu = DEF_LBPU;
774static unsigned int sdebug_lbpws = DEF_LBPWS;
775static unsigned int sdebug_lbpws10 = DEF_LBPWS10;
776static unsigned int sdebug_lbprz = DEF_LBPRZ;
777static unsigned int sdebug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
778static unsigned int sdebug_unmap_granularity = DEF_UNMAP_GRANULARITY;
779static unsigned int sdebug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
780static unsigned int sdebug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
781static unsigned int sdebug_write_same_length = DEF_WRITESAME_LENGTH;
782static int sdebug_uuid_ctl = DEF_UUID_CTL;
783static bool sdebug_random = DEF_RANDOM;
784static bool sdebug_per_host_store = DEF_PER_HOST_STORE;
785static bool sdebug_removable = DEF_REMOVABLE;
786static bool sdebug_clustering;
787static bool sdebug_host_lock = DEF_HOST_LOCK;
788static bool sdebug_strict = DEF_STRICT;
789static bool sdebug_any_injecting_opt;
790static bool sdebug_no_rwlock;
791static bool sdebug_verbose;
792static bool have_dif_prot;
793static bool write_since_sync;
794static bool sdebug_statistics = DEF_STATISTICS;
795static bool sdebug_wp;
796/* Following enum: 0: no zbc, def; 1: host aware; 2: host managed */
797static enum blk_zoned_model sdeb_zbc_model = BLK_ZONED_NONE;
798static char *sdeb_zbc_model_s;
799
800enum sam_lun_addr_method {SAM_LUN_AM_PERIPHERAL = 0x0,
801 SAM_LUN_AM_FLAT = 0x1,
802 SAM_LUN_AM_LOGICAL_UNIT = 0x2,
803 SAM_LUN_AM_EXTENDED = 0x3};
804static enum sam_lun_addr_method sdebug_lun_am = SAM_LUN_AM_PERIPHERAL;
805static int sdebug_lun_am_i = (int)SAM_LUN_AM_PERIPHERAL;
806
807static unsigned int sdebug_store_sectors;
808static sector_t sdebug_capacity; /* in sectors */
809
810/* old BIOS stuff, kernel may get rid of them but some mode sense pages
811 may still need them */
812static int sdebug_heads; /* heads per disk */
813static int sdebug_cylinders_per; /* cylinders per surface */
814static int sdebug_sectors_per; /* sectors per cylinder */
815
816static LIST_HEAD(sdebug_host_list);
817static DEFINE_SPINLOCK(sdebug_host_list_lock);
818
819static struct xarray per_store_arr;
820static struct xarray *per_store_ap = &per_store_arr;
821static int sdeb_first_idx = -1; /* invalid index ==> none created */
822static int sdeb_most_recent_idx = -1;
823static DEFINE_RWLOCK(sdeb_fake_rw_lck); /* need a RW lock when fake_rw=1 */
824
825static unsigned long map_size;
826static int num_aborts;
827static int num_dev_resets;
828static int num_target_resets;
829static int num_bus_resets;
830static int num_host_resets;
831static int dix_writes;
832static int dix_reads;
833static int dif_errors;
834
835/* ZBC global data */
836static bool sdeb_zbc_in_use; /* true for host-aware and host-managed disks */
837static int sdeb_zbc_zone_cap_mb;
838static int sdeb_zbc_zone_size_mb;
839static int sdeb_zbc_max_open = DEF_ZBC_MAX_OPEN_ZONES;
840static int sdeb_zbc_nr_conv = DEF_ZBC_NR_CONV_ZONES;
841
842static int submit_queues = DEF_SUBMIT_QUEUES; /* > 1 for multi-queue (mq) */
843static int poll_queues; /* iouring iopoll interface.*/
844static struct sdebug_queue *sdebug_q_arr; /* ptr to array of submit queues */
845
846static DEFINE_RWLOCK(atomic_rw);
847static DEFINE_RWLOCK(atomic_rw2);
848
849static rwlock_t *ramdisk_lck_a[2];
850
851static char sdebug_proc_name[] = MY_NAME;
852static const char *my_name = MY_NAME;
853
854static struct bus_type pseudo_lld_bus;
855
856static struct device_driver sdebug_driverfs_driver = {
857 .name = sdebug_proc_name,
858 .bus = &pseudo_lld_bus,
859};
860
861static const int check_condition_result =
862 SAM_STAT_CHECK_CONDITION;
863
864static const int illegal_condition_result =
865 (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
866
867static const int device_qfull_result =
868 (DID_ABORT << 16) | SAM_STAT_TASK_SET_FULL;
869
870static const int condition_met_result = SAM_STAT_CONDITION_MET;
871
872
873/* Only do the extra work involved in logical block provisioning if one or
874 * more of the lbpu, lbpws or lbpws10 parameters are given and we are doing
875 * real reads and writes (i.e. not skipping them for speed).
876 */
877static inline bool scsi_debug_lbp(void)
878{
879 return 0 == sdebug_fake_rw &&
880 (sdebug_lbpu || sdebug_lbpws || sdebug_lbpws10);
881}
882
883static void *lba2fake_store(struct sdeb_store_info *sip,
884 unsigned long long lba)
885{
886 struct sdeb_store_info *lsip = sip;
887
888 lba = do_div(lba, sdebug_store_sectors);
889 if (!sip || !sip->storep) {
890 WARN_ON_ONCE(true);
891 lsip = xa_load(per_store_ap, 0); /* should never be NULL */
892 }
893 return lsip->storep + lba * sdebug_sector_size;
894}
895
896static struct t10_pi_tuple *dif_store(struct sdeb_store_info *sip,
897 sector_t sector)
898{
899 sector = sector_div(sector, sdebug_store_sectors);
900
901 return sip->dif_storep + sector;
902}
903
904static void sdebug_max_tgts_luns(void)
905{
906 struct sdebug_host_info *sdbg_host;
907 struct Scsi_Host *hpnt;
908
909 spin_lock(&sdebug_host_list_lock);
910 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
911 hpnt = sdbg_host->shost;
912 if ((hpnt->this_id >= 0) &&
913 (sdebug_num_tgts > hpnt->this_id))
914 hpnt->max_id = sdebug_num_tgts + 1;
915 else
916 hpnt->max_id = sdebug_num_tgts;
917 /* sdebug_max_luns; */
918 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
919 }
920 spin_unlock(&sdebug_host_list_lock);
921}
922
923enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
924
925/* Set in_bit to -1 to indicate no bit position of invalid field */
926static void mk_sense_invalid_fld(struct scsi_cmnd *scp,
927 enum sdeb_cmd_data c_d,
928 int in_byte, int in_bit)
929{
930 unsigned char *sbuff;
931 u8 sks[4];
932 int sl, asc;
933
934 sbuff = scp->sense_buffer;
935 if (!sbuff) {
936 sdev_printk(KERN_ERR, scp->device,
937 "%s: sense_buffer is NULL\n", __func__);
938 return;
939 }
940 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
941 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
942 scsi_build_sense(scp, sdebug_dsense, ILLEGAL_REQUEST, asc, 0);
943 memset(sks, 0, sizeof(sks));
944 sks[0] = 0x80;
945 if (c_d)
946 sks[0] |= 0x40;
947 if (in_bit >= 0) {
948 sks[0] |= 0x8;
949 sks[0] |= 0x7 & in_bit;
950 }
951 put_unaligned_be16(in_byte, sks + 1);
952 if (sdebug_dsense) {
953 sl = sbuff[7] + 8;
954 sbuff[7] = sl;
955 sbuff[sl] = 0x2;
956 sbuff[sl + 1] = 0x6;
957 memcpy(sbuff + sl + 4, sks, 3);
958 } else
959 memcpy(sbuff + 15, sks, 3);
960 if (sdebug_verbose)
961 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
962 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
963 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
964}
965
966static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
967{
968 if (!scp->sense_buffer) {
969 sdev_printk(KERN_ERR, scp->device,
970 "%s: sense_buffer is NULL\n", __func__);
971 return;
972 }
973 memset(scp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
974
975 scsi_build_sense(scp, sdebug_dsense, key, asc, asq);
976
977 if (sdebug_verbose)
978 sdev_printk(KERN_INFO, scp->device,
979 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
980 my_name, key, asc, asq);
981}
982
983static void mk_sense_invalid_opcode(struct scsi_cmnd *scp)
984{
985 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
986}
987
988static int scsi_debug_ioctl(struct scsi_device *dev, unsigned int cmd,
989 void __user *arg)
990{
991 if (sdebug_verbose) {
992 if (0x1261 == cmd)
993 sdev_printk(KERN_INFO, dev,
994 "%s: BLKFLSBUF [0x1261]\n", __func__);
995 else if (0x5331 == cmd)
996 sdev_printk(KERN_INFO, dev,
997 "%s: CDROM_GET_CAPABILITY [0x5331]\n",
998 __func__);
999 else
1000 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
1001 __func__, cmd);
1002 }
1003 return -EINVAL;
1004 /* return -ENOTTY; // correct return but upsets fdisk */
1005}
1006
1007static void config_cdb_len(struct scsi_device *sdev)
1008{
1009 switch (sdebug_cdb_len) {
1010 case 6: /* suggest 6 byte READ, WRITE and MODE SENSE/SELECT */
1011 sdev->use_10_for_rw = false;
1012 sdev->use_16_for_rw = false;
1013 sdev->use_10_for_ms = false;
1014 break;
1015 case 10: /* suggest 10 byte RWs and 6 byte MODE SENSE/SELECT */
1016 sdev->use_10_for_rw = true;
1017 sdev->use_16_for_rw = false;
1018 sdev->use_10_for_ms = false;
1019 break;
1020 case 12: /* suggest 10 byte RWs and 10 byte MODE SENSE/SELECT */
1021 sdev->use_10_for_rw = true;
1022 sdev->use_16_for_rw = false;
1023 sdev->use_10_for_ms = true;
1024 break;
1025 case 16:
1026 sdev->use_10_for_rw = false;
1027 sdev->use_16_for_rw = true;
1028 sdev->use_10_for_ms = true;
1029 break;
1030 case 32: /* No knobs to suggest this so same as 16 for now */
1031 sdev->use_10_for_rw = false;
1032 sdev->use_16_for_rw = true;
1033 sdev->use_10_for_ms = true;
1034 break;
1035 default:
1036 pr_warn("unexpected cdb_len=%d, force to 10\n",
1037 sdebug_cdb_len);
1038 sdev->use_10_for_rw = true;
1039 sdev->use_16_for_rw = false;
1040 sdev->use_10_for_ms = false;
1041 sdebug_cdb_len = 10;
1042 break;
1043 }
1044}
1045
1046static void all_config_cdb_len(void)
1047{
1048 struct sdebug_host_info *sdbg_host;
1049 struct Scsi_Host *shost;
1050 struct scsi_device *sdev;
1051
1052 spin_lock(&sdebug_host_list_lock);
1053 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
1054 shost = sdbg_host->shost;
1055 shost_for_each_device(sdev, shost) {
1056 config_cdb_len(sdev);
1057 }
1058 }
1059 spin_unlock(&sdebug_host_list_lock);
1060}
1061
1062static void clear_luns_changed_on_target(struct sdebug_dev_info *devip)
1063{
1064 struct sdebug_host_info *sdhp;
1065 struct sdebug_dev_info *dp;
1066
1067 spin_lock(&sdebug_host_list_lock);
1068 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
1069 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
1070 if ((devip->sdbg_host == dp->sdbg_host) &&
1071 (devip->target == dp->target))
1072 clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
1073 }
1074 }
1075 spin_unlock(&sdebug_host_list_lock);
1076}
1077
1078static int make_ua(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1079{
1080 int k;
1081
1082 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
1083 if (k != SDEBUG_NUM_UAS) {
1084 const char *cp = NULL;
1085
1086 switch (k) {
1087 case SDEBUG_UA_POR:
1088 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
1089 POWER_ON_RESET_ASCQ);
1090 if (sdebug_verbose)
1091 cp = "power on reset";
1092 break;
1093 case SDEBUG_UA_POOCCUR:
1094 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
1095 POWER_ON_OCCURRED_ASCQ);
1096 if (sdebug_verbose)
1097 cp = "power on occurred";
1098 break;
1099 case SDEBUG_UA_BUS_RESET:
1100 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
1101 BUS_RESET_ASCQ);
1102 if (sdebug_verbose)
1103 cp = "bus reset";
1104 break;
1105 case SDEBUG_UA_MODE_CHANGED:
1106 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
1107 MODE_CHANGED_ASCQ);
1108 if (sdebug_verbose)
1109 cp = "mode parameters changed";
1110 break;
1111 case SDEBUG_UA_CAPACITY_CHANGED:
1112 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
1113 CAPACITY_CHANGED_ASCQ);
1114 if (sdebug_verbose)
1115 cp = "capacity data changed";
1116 break;
1117 case SDEBUG_UA_MICROCODE_CHANGED:
1118 mk_sense_buffer(scp, UNIT_ATTENTION,
1119 TARGET_CHANGED_ASC,
1120 MICROCODE_CHANGED_ASCQ);
1121 if (sdebug_verbose)
1122 cp = "microcode has been changed";
1123 break;
1124 case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET:
1125 mk_sense_buffer(scp, UNIT_ATTENTION,
1126 TARGET_CHANGED_ASC,
1127 MICROCODE_CHANGED_WO_RESET_ASCQ);
1128 if (sdebug_verbose)
1129 cp = "microcode has been changed without reset";
1130 break;
1131 case SDEBUG_UA_LUNS_CHANGED:
1132 /*
1133 * SPC-3 behavior is to report a UNIT ATTENTION with
1134 * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN
1135 * on the target, until a REPORT LUNS command is
1136 * received. SPC-4 behavior is to report it only once.
1137 * NOTE: sdebug_scsi_level does not use the same
1138 * values as struct scsi_device->scsi_level.
1139 */
1140 if (sdebug_scsi_level >= 6) /* SPC-4 and above */
1141 clear_luns_changed_on_target(devip);
1142 mk_sense_buffer(scp, UNIT_ATTENTION,
1143 TARGET_CHANGED_ASC,
1144 LUNS_CHANGED_ASCQ);
1145 if (sdebug_verbose)
1146 cp = "reported luns data has changed";
1147 break;
1148 default:
1149 pr_warn("unexpected unit attention code=%d\n", k);
1150 if (sdebug_verbose)
1151 cp = "unknown";
1152 break;
1153 }
1154 clear_bit(k, devip->uas_bm);
1155 if (sdebug_verbose)
1156 sdev_printk(KERN_INFO, scp->device,
1157 "%s reports: Unit attention: %s\n",
1158 my_name, cp);
1159 return check_condition_result;
1160 }
1161 return 0;
1162}
1163
1164/* Build SCSI "data-in" buffer. Returns 0 if ok else (DID_ERROR << 16). */
1165static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1166 int arr_len)
1167{
1168 int act_len;
1169 struct scsi_data_buffer *sdb = &scp->sdb;
1170
1171 if (!sdb->length)
1172 return 0;
1173 if (scp->sc_data_direction != DMA_FROM_DEVICE)
1174 return DID_ERROR << 16;
1175
1176 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
1177 arr, arr_len);
1178 scsi_set_resid(scp, scsi_bufflen(scp) - act_len);
1179
1180 return 0;
1181}
1182
1183/* Partial build of SCSI "data-in" buffer. Returns 0 if ok else
1184 * (DID_ERROR << 16). Can write to offset in data-in buffer. If multiple
1185 * calls, not required to write in ascending offset order. Assumes resid
1186 * set to scsi_bufflen() prior to any calls.
1187 */
1188static int p_fill_from_dev_buffer(struct scsi_cmnd *scp, const void *arr,
1189 int arr_len, unsigned int off_dst)
1190{
1191 unsigned int act_len, n;
1192 struct scsi_data_buffer *sdb = &scp->sdb;
1193 off_t skip = off_dst;
1194
1195 if (sdb->length <= off_dst)
1196 return 0;
1197 if (scp->sc_data_direction != DMA_FROM_DEVICE)
1198 return DID_ERROR << 16;
1199
1200 act_len = sg_pcopy_from_buffer(sdb->table.sgl, sdb->table.nents,
1201 arr, arr_len, skip);
1202 pr_debug("%s: off_dst=%u, scsi_bufflen=%u, act_len=%u, resid=%d\n",
1203 __func__, off_dst, scsi_bufflen(scp), act_len,
1204 scsi_get_resid(scp));
1205 n = scsi_bufflen(scp) - (off_dst + act_len);
1206 scsi_set_resid(scp, min_t(u32, scsi_get_resid(scp), n));
1207 return 0;
1208}
1209
1210/* Fetches from SCSI "data-out" buffer. Returns number of bytes fetched into
1211 * 'arr' or -1 if error.
1212 */
1213static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1214 int arr_len)
1215{
1216 if (!scsi_bufflen(scp))
1217 return 0;
1218 if (scp->sc_data_direction != DMA_TO_DEVICE)
1219 return -1;
1220
1221 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
1222}
1223
1224
1225static char sdebug_inq_vendor_id[9] = "Linux ";
1226static char sdebug_inq_product_id[17] = "scsi_debug ";
1227static char sdebug_inq_product_rev[5] = SDEBUG_VERSION;
1228/* Use some locally assigned NAAs for SAS addresses. */
1229static const u64 naa3_comp_a = 0x3222222000000000ULL;
1230static const u64 naa3_comp_b = 0x3333333000000000ULL;
1231static const u64 naa3_comp_c = 0x3111111000000000ULL;
1232
1233/* Device identification VPD page. Returns number of bytes placed in arr */
1234static int inquiry_vpd_83(unsigned char *arr, int port_group_id,
1235 int target_dev_id, int dev_id_num,
1236 const char *dev_id_str, int dev_id_str_len,
1237 const uuid_t *lu_name)
1238{
1239 int num, port_a;
1240 char b[32];
1241
1242 port_a = target_dev_id + 1;
1243 /* T10 vendor identifier field format (faked) */
1244 arr[0] = 0x2; /* ASCII */
1245 arr[1] = 0x1;
1246 arr[2] = 0x0;
1247 memcpy(&arr[4], sdebug_inq_vendor_id, 8);
1248 memcpy(&arr[12], sdebug_inq_product_id, 16);
1249 memcpy(&arr[28], dev_id_str, dev_id_str_len);
1250 num = 8 + 16 + dev_id_str_len;
1251 arr[3] = num;
1252 num += 4;
1253 if (dev_id_num >= 0) {
1254 if (sdebug_uuid_ctl) {
1255 /* Locally assigned UUID */
1256 arr[num++] = 0x1; /* binary (not necessarily sas) */
1257 arr[num++] = 0xa; /* PIV=0, lu, naa */
1258 arr[num++] = 0x0;
1259 arr[num++] = 0x12;
1260 arr[num++] = 0x10; /* uuid type=1, locally assigned */
1261 arr[num++] = 0x0;
1262 memcpy(arr + num, lu_name, 16);
1263 num += 16;
1264 } else {
1265 /* NAA-3, Logical unit identifier (binary) */
1266 arr[num++] = 0x1; /* binary (not necessarily sas) */
1267 arr[num++] = 0x3; /* PIV=0, lu, naa */
1268 arr[num++] = 0x0;
1269 arr[num++] = 0x8;
1270 put_unaligned_be64(naa3_comp_b + dev_id_num, arr + num);
1271 num += 8;
1272 }
1273 /* Target relative port number */
1274 arr[num++] = 0x61; /* proto=sas, binary */
1275 arr[num++] = 0x94; /* PIV=1, target port, rel port */
1276 arr[num++] = 0x0; /* reserved */
1277 arr[num++] = 0x4; /* length */
1278 arr[num++] = 0x0; /* reserved */
1279 arr[num++] = 0x0; /* reserved */
1280 arr[num++] = 0x0;
1281 arr[num++] = 0x1; /* relative port A */
1282 }
1283 /* NAA-3, Target port identifier */
1284 arr[num++] = 0x61; /* proto=sas, binary */
1285 arr[num++] = 0x93; /* piv=1, target port, naa */
1286 arr[num++] = 0x0;
1287 arr[num++] = 0x8;
1288 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1289 num += 8;
1290 /* NAA-3, Target port group identifier */
1291 arr[num++] = 0x61; /* proto=sas, binary */
1292 arr[num++] = 0x95; /* piv=1, target port group id */
1293 arr[num++] = 0x0;
1294 arr[num++] = 0x4;
1295 arr[num++] = 0;
1296 arr[num++] = 0;
1297 put_unaligned_be16(port_group_id, arr + num);
1298 num += 2;
1299 /* NAA-3, Target device identifier */
1300 arr[num++] = 0x61; /* proto=sas, binary */
1301 arr[num++] = 0xa3; /* piv=1, target device, naa */
1302 arr[num++] = 0x0;
1303 arr[num++] = 0x8;
1304 put_unaligned_be64(naa3_comp_a + target_dev_id, arr + num);
1305 num += 8;
1306 /* SCSI name string: Target device identifier */
1307 arr[num++] = 0x63; /* proto=sas, UTF-8 */
1308 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
1309 arr[num++] = 0x0;
1310 arr[num++] = 24;
1311 memcpy(arr + num, "naa.32222220", 12);
1312 num += 12;
1313 snprintf(b, sizeof(b), "%08X", target_dev_id);
1314 memcpy(arr + num, b, 8);
1315 num += 8;
1316 memset(arr + num, 0, 4);
1317 num += 4;
1318 return num;
1319}
1320
1321static unsigned char vpd84_data[] = {
1322/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
1323 0x22,0x22,0x22,0x0,0xbb,0x1,
1324 0x22,0x22,0x22,0x0,0xbb,0x2,
1325};
1326
1327/* Software interface identification VPD page */
1328static int inquiry_vpd_84(unsigned char *arr)
1329{
1330 memcpy(arr, vpd84_data, sizeof(vpd84_data));
1331 return sizeof(vpd84_data);
1332}
1333
1334/* Management network addresses VPD page */
1335static int inquiry_vpd_85(unsigned char *arr)
1336{
1337 int num = 0;
1338 const char *na1 = "https://www.kernel.org/config";
1339 const char *na2 = "http://www.kernel.org/log";
1340 int plen, olen;
1341
1342 arr[num++] = 0x1; /* lu, storage config */
1343 arr[num++] = 0x0; /* reserved */
1344 arr[num++] = 0x0;
1345 olen = strlen(na1);
1346 plen = olen + 1;
1347 if (plen % 4)
1348 plen = ((plen / 4) + 1) * 4;
1349 arr[num++] = plen; /* length, null termianted, padded */
1350 memcpy(arr + num, na1, olen);
1351 memset(arr + num + olen, 0, plen - olen);
1352 num += plen;
1353
1354 arr[num++] = 0x4; /* lu, logging */
1355 arr[num++] = 0x0; /* reserved */
1356 arr[num++] = 0x0;
1357 olen = strlen(na2);
1358 plen = olen + 1;
1359 if (plen % 4)
1360 plen = ((plen / 4) + 1) * 4;
1361 arr[num++] = plen; /* length, null terminated, padded */
1362 memcpy(arr + num, na2, olen);
1363 memset(arr + num + olen, 0, plen - olen);
1364 num += plen;
1365
1366 return num;
1367}
1368
1369/* SCSI ports VPD page */
1370static int inquiry_vpd_88(unsigned char *arr, int target_dev_id)
1371{
1372 int num = 0;
1373 int port_a, port_b;
1374
1375 port_a = target_dev_id + 1;
1376 port_b = port_a + 1;
1377 arr[num++] = 0x0; /* reserved */
1378 arr[num++] = 0x0; /* reserved */
1379 arr[num++] = 0x0;
1380 arr[num++] = 0x1; /* relative port 1 (primary) */
1381 memset(arr + num, 0, 6);
1382 num += 6;
1383 arr[num++] = 0x0;
1384 arr[num++] = 12; /* length tp descriptor */
1385 /* naa-5 target port identifier (A) */
1386 arr[num++] = 0x61; /* proto=sas, binary */
1387 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1388 arr[num++] = 0x0; /* reserved */
1389 arr[num++] = 0x8; /* length */
1390 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1391 num += 8;
1392 arr[num++] = 0x0; /* reserved */
1393 arr[num++] = 0x0; /* reserved */
1394 arr[num++] = 0x0;
1395 arr[num++] = 0x2; /* relative port 2 (secondary) */
1396 memset(arr + num, 0, 6);
1397 num += 6;
1398 arr[num++] = 0x0;
1399 arr[num++] = 12; /* length tp descriptor */
1400 /* naa-5 target port identifier (B) */
1401 arr[num++] = 0x61; /* proto=sas, binary */
1402 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1403 arr[num++] = 0x0; /* reserved */
1404 arr[num++] = 0x8; /* length */
1405 put_unaligned_be64(naa3_comp_a + port_b, arr + num);
1406 num += 8;
1407
1408 return num;
1409}
1410
1411
1412static unsigned char vpd89_data[] = {
1413/* from 4th byte */ 0,0,0,0,
1414'l','i','n','u','x',' ',' ',' ',
1415'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
1416'1','2','3','4',
14170x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
14180xec,0,0,0,
14190x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
14200,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
14210x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
14220x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
14230x53,0x41,
14240x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
14250x20,0x20,
14260x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
14270x10,0x80,
14280,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
14290x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
14300x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
14310,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
14320x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
14330x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
14340,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
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,
14380x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
14390,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
14400xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
14410,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
14420,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14430,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14440,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14450,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14460,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14470,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14480,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14490,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14500,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14510,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14520,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14530,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
1454};
1455
1456/* ATA Information VPD page */
1457static int inquiry_vpd_89(unsigned char *arr)
1458{
1459 memcpy(arr, vpd89_data, sizeof(vpd89_data));
1460 return sizeof(vpd89_data);
1461}
1462
1463
1464static unsigned char vpdb0_data[] = {
1465 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
1466 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1467 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1468 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1469};
1470
1471/* Block limits VPD page (SBC-3) */
1472static int inquiry_vpd_b0(unsigned char *arr)
1473{
1474 unsigned int gran;
1475
1476 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
1477
1478 /* Optimal transfer length granularity */
1479 if (sdebug_opt_xferlen_exp != 0 &&
1480 sdebug_physblk_exp < sdebug_opt_xferlen_exp)
1481 gran = 1 << sdebug_opt_xferlen_exp;
1482 else
1483 gran = 1 << sdebug_physblk_exp;
1484 put_unaligned_be16(gran, arr + 2);
1485
1486 /* Maximum Transfer Length */
1487 if (sdebug_store_sectors > 0x400)
1488 put_unaligned_be32(sdebug_store_sectors, arr + 4);
1489
1490 /* Optimal Transfer Length */
1491 put_unaligned_be32(sdebug_opt_blks, &arr[8]);
1492
1493 if (sdebug_lbpu) {
1494 /* Maximum Unmap LBA Count */
1495 put_unaligned_be32(sdebug_unmap_max_blocks, &arr[16]);
1496
1497 /* Maximum Unmap Block Descriptor Count */
1498 put_unaligned_be32(sdebug_unmap_max_desc, &arr[20]);
1499 }
1500
1501 /* Unmap Granularity Alignment */
1502 if (sdebug_unmap_alignment) {
1503 put_unaligned_be32(sdebug_unmap_alignment, &arr[28]);
1504 arr[28] |= 0x80; /* UGAVALID */
1505 }
1506
1507 /* Optimal Unmap Granularity */
1508 put_unaligned_be32(sdebug_unmap_granularity, &arr[24]);
1509
1510 /* Maximum WRITE SAME Length */
1511 put_unaligned_be64(sdebug_write_same_length, &arr[32]);
1512
1513 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
1514}
1515
1516/* Block device characteristics VPD page (SBC-3) */
1517static int inquiry_vpd_b1(struct sdebug_dev_info *devip, unsigned char *arr)
1518{
1519 memset(arr, 0, 0x3c);
1520 arr[0] = 0;
1521 arr[1] = 1; /* non rotating medium (e.g. solid state) */
1522 arr[2] = 0;
1523 arr[3] = 5; /* less than 1.8" */
1524 if (devip->zmodel == BLK_ZONED_HA)
1525 arr[4] = 1 << 4; /* zoned field = 01b */
1526
1527 return 0x3c;
1528}
1529
1530/* Logical block provisioning VPD page (SBC-4) */
1531static int inquiry_vpd_b2(unsigned char *arr)
1532{
1533 memset(arr, 0, 0x4);
1534 arr[0] = 0; /* threshold exponent */
1535 if (sdebug_lbpu)
1536 arr[1] = 1 << 7;
1537 if (sdebug_lbpws)
1538 arr[1] |= 1 << 6;
1539 if (sdebug_lbpws10)
1540 arr[1] |= 1 << 5;
1541 if (sdebug_lbprz && scsi_debug_lbp())
1542 arr[1] |= (sdebug_lbprz & 0x7) << 2; /* sbc4r07 and later */
1543 /* anc_sup=0; dp=0 (no provisioning group descriptor) */
1544 /* minimum_percentage=0; provisioning_type=0 (unknown) */
1545 /* threshold_percentage=0 */
1546 return 0x4;
1547}
1548
1549/* Zoned block device characteristics VPD page (ZBC mandatory) */
1550static int inquiry_vpd_b6(struct sdebug_dev_info *devip, unsigned char *arr)
1551{
1552 memset(arr, 0, 0x3c);
1553 arr[0] = 0x1; /* set URSWRZ (unrestricted read in seq. wr req zone) */
1554 /*
1555 * Set Optimal number of open sequential write preferred zones and
1556 * Optimal number of non-sequentially written sequential write
1557 * preferred zones fields to 'not reported' (0xffffffff). Leave other
1558 * fields set to zero, apart from Max. number of open swrz_s field.
1559 */
1560 put_unaligned_be32(0xffffffff, &arr[4]);
1561 put_unaligned_be32(0xffffffff, &arr[8]);
1562 if (sdeb_zbc_model == BLK_ZONED_HM && devip->max_open)
1563 put_unaligned_be32(devip->max_open, &arr[12]);
1564 else
1565 put_unaligned_be32(0xffffffff, &arr[12]);
1566 if (devip->zcap < devip->zsize) {
1567 arr[19] = ZBC_CONSTANT_ZONE_START_OFFSET;
1568 put_unaligned_be64(devip->zsize, &arr[20]);
1569 } else {
1570 arr[19] = 0;
1571 }
1572 return 0x3c;
1573}
1574
1575#define SDEBUG_LONG_INQ_SZ 96
1576#define SDEBUG_MAX_INQ_ARR_SZ 584
1577
1578static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1579{
1580 unsigned char pq_pdt;
1581 unsigned char *arr;
1582 unsigned char *cmd = scp->cmnd;
1583 u32 alloc_len, n;
1584 int ret;
1585 bool have_wlun, is_disk, is_zbc, is_disk_zbc;
1586
1587 alloc_len = get_unaligned_be16(cmd + 3);
1588 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
1589 if (! arr)
1590 return DID_REQUEUE << 16;
1591 is_disk = (sdebug_ptype == TYPE_DISK);
1592 is_zbc = (devip->zmodel != BLK_ZONED_NONE);
1593 is_disk_zbc = (is_disk || is_zbc);
1594 have_wlun = scsi_is_wlun(scp->device->lun);
1595 if (have_wlun)
1596 pq_pdt = TYPE_WLUN; /* present, wlun */
1597 else if (sdebug_no_lun_0 && (devip->lun == SDEBUG_LUN_0_VAL))
1598 pq_pdt = 0x7f; /* not present, PQ=3, PDT=0x1f */
1599 else
1600 pq_pdt = (sdebug_ptype & 0x1f);
1601 arr[0] = pq_pdt;
1602 if (0x2 & cmd[1]) { /* CMDDT bit set */
1603 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
1604 kfree(arr);
1605 return check_condition_result;
1606 } else if (0x1 & cmd[1]) { /* EVPD bit set */
1607 int lu_id_num, port_group_id, target_dev_id;
1608 u32 len;
1609 char lu_id_str[6];
1610 int host_no = devip->sdbg_host->shost->host_no;
1611
1612 port_group_id = (((host_no + 1) & 0x7f) << 8) +
1613 (devip->channel & 0x7f);
1614 if (sdebug_vpd_use_hostno == 0)
1615 host_no = 0;
1616 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) +
1617 (devip->target * 1000) + devip->lun);
1618 target_dev_id = ((host_no + 1) * 2000) +
1619 (devip->target * 1000) - 3;
1620 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
1621 if (0 == cmd[2]) { /* supported vital product data pages */
1622 arr[1] = cmd[2]; /*sanity */
1623 n = 4;
1624 arr[n++] = 0x0; /* this page */
1625 arr[n++] = 0x80; /* unit serial number */
1626 arr[n++] = 0x83; /* device identification */
1627 arr[n++] = 0x84; /* software interface ident. */
1628 arr[n++] = 0x85; /* management network addresses */
1629 arr[n++] = 0x86; /* extended inquiry */
1630 arr[n++] = 0x87; /* mode page policy */
1631 arr[n++] = 0x88; /* SCSI ports */
1632 if (is_disk_zbc) { /* SBC or ZBC */
1633 arr[n++] = 0x89; /* ATA information */
1634 arr[n++] = 0xb0; /* Block limits */
1635 arr[n++] = 0xb1; /* Block characteristics */
1636 if (is_disk)
1637 arr[n++] = 0xb2; /* LB Provisioning */
1638 if (is_zbc)
1639 arr[n++] = 0xb6; /* ZB dev. char. */
1640 }
1641 arr[3] = n - 4; /* number of supported VPD pages */
1642 } else if (0x80 == cmd[2]) { /* unit serial number */
1643 arr[1] = cmd[2]; /*sanity */
1644 arr[3] = len;
1645 memcpy(&arr[4], lu_id_str, len);
1646 } else if (0x83 == cmd[2]) { /* device identification */
1647 arr[1] = cmd[2]; /*sanity */
1648 arr[3] = inquiry_vpd_83(&arr[4], port_group_id,
1649 target_dev_id, lu_id_num,
1650 lu_id_str, len,
1651 &devip->lu_name);
1652 } else if (0x84 == cmd[2]) { /* Software interface ident. */
1653 arr[1] = cmd[2]; /*sanity */
1654 arr[3] = inquiry_vpd_84(&arr[4]);
1655 } else if (0x85 == cmd[2]) { /* Management network addresses */
1656 arr[1] = cmd[2]; /*sanity */
1657 arr[3] = inquiry_vpd_85(&arr[4]);
1658 } else if (0x86 == cmd[2]) { /* extended inquiry */
1659 arr[1] = cmd[2]; /*sanity */
1660 arr[3] = 0x3c; /* number of following entries */
1661 if (sdebug_dif == T10_PI_TYPE3_PROTECTION)
1662 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
1663 else if (have_dif_prot)
1664 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
1665 else
1666 arr[4] = 0x0; /* no protection stuff */
1667 arr[5] = 0x7; /* head of q, ordered + simple q's */
1668 } else if (0x87 == cmd[2]) { /* mode page policy */
1669 arr[1] = cmd[2]; /*sanity */
1670 arr[3] = 0x8; /* number of following entries */
1671 arr[4] = 0x2; /* disconnect-reconnect mp */
1672 arr[6] = 0x80; /* mlus, shared */
1673 arr[8] = 0x18; /* protocol specific lu */
1674 arr[10] = 0x82; /* mlus, per initiator port */
1675 } else if (0x88 == cmd[2]) { /* SCSI Ports */
1676 arr[1] = cmd[2]; /*sanity */
1677 arr[3] = inquiry_vpd_88(&arr[4], target_dev_id);
1678 } else if (is_disk_zbc && 0x89 == cmd[2]) { /* ATA info */
1679 arr[1] = cmd[2]; /*sanity */
1680 n = inquiry_vpd_89(&arr[4]);
1681 put_unaligned_be16(n, arr + 2);
1682 } else if (is_disk_zbc && 0xb0 == cmd[2]) { /* Block limits */
1683 arr[1] = cmd[2]; /*sanity */
1684 arr[3] = inquiry_vpd_b0(&arr[4]);
1685 } else if (is_disk_zbc && 0xb1 == cmd[2]) { /* Block char. */
1686 arr[1] = cmd[2]; /*sanity */
1687 arr[3] = inquiry_vpd_b1(devip, &arr[4]);
1688 } else if (is_disk && 0xb2 == cmd[2]) { /* LB Prov. */
1689 arr[1] = cmd[2]; /*sanity */
1690 arr[3] = inquiry_vpd_b2(&arr[4]);
1691 } else if (is_zbc && cmd[2] == 0xb6) { /* ZB dev. charact. */
1692 arr[1] = cmd[2]; /*sanity */
1693 arr[3] = inquiry_vpd_b6(devip, &arr[4]);
1694 } else {
1695 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
1696 kfree(arr);
1697 return check_condition_result;
1698 }
1699 len = min_t(u32, get_unaligned_be16(arr + 2) + 4, alloc_len);
1700 ret = fill_from_dev_buffer(scp, arr,
1701 min_t(u32, len, SDEBUG_MAX_INQ_ARR_SZ));
1702 kfree(arr);
1703 return ret;
1704 }
1705 /* drops through here for a standard inquiry */
1706 arr[1] = sdebug_removable ? 0x80 : 0; /* Removable disk */
1707 arr[2] = sdebug_scsi_level;
1708 arr[3] = 2; /* response_data_format==2 */
1709 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
1710 arr[5] = (int)have_dif_prot; /* PROTECT bit */
1711 if (sdebug_vpd_use_hostno == 0)
1712 arr[5] |= 0x10; /* claim: implicit TPGS */
1713 arr[6] = 0x10; /* claim: MultiP */
1714 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
1715 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
1716 memcpy(&arr[8], sdebug_inq_vendor_id, 8);
1717 memcpy(&arr[16], sdebug_inq_product_id, 16);
1718 memcpy(&arr[32], sdebug_inq_product_rev, 4);
1719 /* Use Vendor Specific area to place driver date in ASCII hex */
1720 memcpy(&arr[36], sdebug_version_date, 8);
1721 /* version descriptors (2 bytes each) follow */
1722 put_unaligned_be16(0xc0, arr + 58); /* SAM-6 no version claimed */
1723 put_unaligned_be16(0x5c0, arr + 60); /* SPC-5 no version claimed */
1724 n = 62;
1725 if (is_disk) { /* SBC-4 no version claimed */
1726 put_unaligned_be16(0x600, arr + n);
1727 n += 2;
1728 } else if (sdebug_ptype == TYPE_TAPE) { /* SSC-4 rev 3 */
1729 put_unaligned_be16(0x525, arr + n);
1730 n += 2;
1731 } else if (is_zbc) { /* ZBC BSR INCITS 536 revision 05 */
1732 put_unaligned_be16(0x624, arr + n);
1733 n += 2;
1734 }
1735 put_unaligned_be16(0x2100, arr + n); /* SPL-4 no version claimed */
1736 ret = fill_from_dev_buffer(scp, arr,
1737 min_t(u32, alloc_len, SDEBUG_LONG_INQ_SZ));
1738 kfree(arr);
1739 return ret;
1740}
1741
1742/* See resp_iec_m_pg() for how this data is manipulated */
1743static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1744 0, 0, 0x0, 0x0};
1745
1746static int resp_requests(struct scsi_cmnd *scp,
1747 struct sdebug_dev_info *devip)
1748{
1749 unsigned char *cmd = scp->cmnd;
1750 unsigned char arr[SCSI_SENSE_BUFFERSIZE]; /* assume >= 18 bytes */
1751 bool dsense = !!(cmd[1] & 1);
1752 u32 alloc_len = cmd[4];
1753 u32 len = 18;
1754 int stopped_state = atomic_read(&devip->stopped);
1755
1756 memset(arr, 0, sizeof(arr));
1757 if (stopped_state > 0) { /* some "pollable" data [spc6r02: 5.12.2] */
1758 if (dsense) {
1759 arr[0] = 0x72;
1760 arr[1] = NOT_READY;
1761 arr[2] = LOGICAL_UNIT_NOT_READY;
1762 arr[3] = (stopped_state == 2) ? 0x1 : 0x2;
1763 len = 8;
1764 } else {
1765 arr[0] = 0x70;
1766 arr[2] = NOT_READY; /* NO_SENSE in sense_key */
1767 arr[7] = 0xa; /* 18 byte sense buffer */
1768 arr[12] = LOGICAL_UNIT_NOT_READY;
1769 arr[13] = (stopped_state == 2) ? 0x1 : 0x2;
1770 }
1771 } else if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
1772 /* Information exceptions control mode page: TEST=1, MRIE=6 */
1773 if (dsense) {
1774 arr[0] = 0x72;
1775 arr[1] = 0x0; /* NO_SENSE in sense_key */
1776 arr[2] = THRESHOLD_EXCEEDED;
1777 arr[3] = 0xff; /* Failure prediction(false) */
1778 len = 8;
1779 } else {
1780 arr[0] = 0x70;
1781 arr[2] = 0x0; /* NO_SENSE in sense_key */
1782 arr[7] = 0xa; /* 18 byte sense buffer */
1783 arr[12] = THRESHOLD_EXCEEDED;
1784 arr[13] = 0xff; /* Failure prediction(false) */
1785 }
1786 } else { /* nothing to report */
1787 if (dsense) {
1788 len = 8;
1789 memset(arr, 0, len);
1790 arr[0] = 0x72;
1791 } else {
1792 memset(arr, 0, len);
1793 arr[0] = 0x70;
1794 arr[7] = 0xa;
1795 }
1796 }
1797 return fill_from_dev_buffer(scp, arr, min_t(u32, len, alloc_len));
1798}
1799
1800static int resp_start_stop(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1801{
1802 unsigned char *cmd = scp->cmnd;
1803 int power_cond, want_stop, stopped_state;
1804 bool changing;
1805
1806 power_cond = (cmd[4] & 0xf0) >> 4;
1807 if (power_cond) {
1808 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
1809 return check_condition_result;
1810 }
1811 want_stop = !(cmd[4] & 1);
1812 stopped_state = atomic_read(&devip->stopped);
1813 if (stopped_state == 2) {
1814 ktime_t now_ts = ktime_get_boottime();
1815
1816 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) {
1817 u64 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts));
1818
1819 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) {
1820 /* tur_ms_to_ready timer extinguished */
1821 atomic_set(&devip->stopped, 0);
1822 stopped_state = 0;
1823 }
1824 }
1825 if (stopped_state == 2) {
1826 if (want_stop) {
1827 stopped_state = 1; /* dummy up success */
1828 } else { /* Disallow tur_ms_to_ready delay to be overridden */
1829 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 0 /* START bit */);
1830 return check_condition_result;
1831 }
1832 }
1833 }
1834 changing = (stopped_state != want_stop);
1835 if (changing)
1836 atomic_xchg(&devip->stopped, want_stop);
1837 if (!changing || (cmd[1] & 0x1)) /* state unchanged or IMMED bit set in cdb */
1838 return SDEG_RES_IMMED_MASK;
1839 else
1840 return 0;
1841}
1842
1843static sector_t get_sdebug_capacity(void)
1844{
1845 static const unsigned int gibibyte = 1073741824;
1846
1847 if (sdebug_virtual_gb > 0)
1848 return (sector_t)sdebug_virtual_gb *
1849 (gibibyte / sdebug_sector_size);
1850 else
1851 return sdebug_store_sectors;
1852}
1853
1854#define SDEBUG_READCAP_ARR_SZ 8
1855static int resp_readcap(struct scsi_cmnd *scp,
1856 struct sdebug_dev_info *devip)
1857{
1858 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
1859 unsigned int capac;
1860
1861 /* following just in case virtual_gb changed */
1862 sdebug_capacity = get_sdebug_capacity();
1863 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
1864 if (sdebug_capacity < 0xffffffff) {
1865 capac = (unsigned int)sdebug_capacity - 1;
1866 put_unaligned_be32(capac, arr + 0);
1867 } else
1868 put_unaligned_be32(0xffffffff, arr + 0);
1869 put_unaligned_be16(sdebug_sector_size, arr + 6);
1870 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1871}
1872
1873#define SDEBUG_READCAP16_ARR_SZ 32
1874static int resp_readcap16(struct scsi_cmnd *scp,
1875 struct sdebug_dev_info *devip)
1876{
1877 unsigned char *cmd = scp->cmnd;
1878 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
1879 u32 alloc_len;
1880
1881 alloc_len = get_unaligned_be32(cmd + 10);
1882 /* following just in case virtual_gb changed */
1883 sdebug_capacity = get_sdebug_capacity();
1884 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
1885 put_unaligned_be64((u64)(sdebug_capacity - 1), arr + 0);
1886 put_unaligned_be32(sdebug_sector_size, arr + 8);
1887 arr[13] = sdebug_physblk_exp & 0xf;
1888 arr[14] = (sdebug_lowest_aligned >> 8) & 0x3f;
1889
1890 if (scsi_debug_lbp()) {
1891 arr[14] |= 0x80; /* LBPME */
1892 /* from sbc4r07, this LBPRZ field is 1 bit, but the LBPRZ in
1893 * the LB Provisioning VPD page is 3 bits. Note that lbprz=2
1894 * in the wider field maps to 0 in this field.
1895 */
1896 if (sdebug_lbprz & 1) /* precisely what the draft requires */
1897 arr[14] |= 0x40;
1898 }
1899
1900 /*
1901 * Since the scsi_debug READ CAPACITY implementation always reports the
1902 * total disk capacity, set RC BASIS = 1 for host-managed ZBC devices.
1903 */
1904 if (devip->zmodel == BLK_ZONED_HM)
1905 arr[12] |= 1 << 4;
1906
1907 arr[15] = sdebug_lowest_aligned & 0xff;
1908
1909 if (have_dif_prot) {
1910 arr[12] = (sdebug_dif - 1) << 1; /* P_TYPE */
1911 arr[12] |= 1; /* PROT_EN */
1912 }
1913
1914 return fill_from_dev_buffer(scp, arr,
1915 min_t(u32, alloc_len, SDEBUG_READCAP16_ARR_SZ));
1916}
1917
1918#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1919
1920static int resp_report_tgtpgs(struct scsi_cmnd *scp,
1921 struct sdebug_dev_info *devip)
1922{
1923 unsigned char *cmd = scp->cmnd;
1924 unsigned char *arr;
1925 int host_no = devip->sdbg_host->shost->host_no;
1926 int port_group_a, port_group_b, port_a, port_b;
1927 u32 alen, n, rlen;
1928 int ret;
1929
1930 alen = get_unaligned_be32(cmd + 6);
1931 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1932 if (! arr)
1933 return DID_REQUEUE << 16;
1934 /*
1935 * EVPD page 0x88 states we have two ports, one
1936 * real and a fake port with no device connected.
1937 * So we create two port groups with one port each
1938 * and set the group with port B to unavailable.
1939 */
1940 port_a = 0x1; /* relative port A */
1941 port_b = 0x2; /* relative port B */
1942 port_group_a = (((host_no + 1) & 0x7f) << 8) +
1943 (devip->channel & 0x7f);
1944 port_group_b = (((host_no + 1) & 0x7f) << 8) +
1945 (devip->channel & 0x7f) + 0x80;
1946
1947 /*
1948 * The asymmetric access state is cycled according to the host_id.
1949 */
1950 n = 4;
1951 if (sdebug_vpd_use_hostno == 0) {
1952 arr[n++] = host_no % 3; /* Asymm access state */
1953 arr[n++] = 0x0F; /* claim: all states are supported */
1954 } else {
1955 arr[n++] = 0x0; /* Active/Optimized path */
1956 arr[n++] = 0x01; /* only support active/optimized paths */
1957 }
1958 put_unaligned_be16(port_group_a, arr + n);
1959 n += 2;
1960 arr[n++] = 0; /* Reserved */
1961 arr[n++] = 0; /* Status code */
1962 arr[n++] = 0; /* Vendor unique */
1963 arr[n++] = 0x1; /* One port per group */
1964 arr[n++] = 0; /* Reserved */
1965 arr[n++] = 0; /* Reserved */
1966 put_unaligned_be16(port_a, arr + n);
1967 n += 2;
1968 arr[n++] = 3; /* Port unavailable */
1969 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
1970 put_unaligned_be16(port_group_b, arr + n);
1971 n += 2;
1972 arr[n++] = 0; /* Reserved */
1973 arr[n++] = 0; /* Status code */
1974 arr[n++] = 0; /* Vendor unique */
1975 arr[n++] = 0x1; /* One port per group */
1976 arr[n++] = 0; /* Reserved */
1977 arr[n++] = 0; /* Reserved */
1978 put_unaligned_be16(port_b, arr + n);
1979 n += 2;
1980
1981 rlen = n - 4;
1982 put_unaligned_be32(rlen, arr + 0);
1983
1984 /*
1985 * Return the smallest value of either
1986 * - The allocated length
1987 * - The constructed command length
1988 * - The maximum array size
1989 */
1990 rlen = min(alen, n);
1991 ret = fill_from_dev_buffer(scp, arr,
1992 min_t(u32, rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1993 kfree(arr);
1994 return ret;
1995}
1996
1997static int resp_rsup_opcodes(struct scsi_cmnd *scp,
1998 struct sdebug_dev_info *devip)
1999{
2000 bool rctd;
2001 u8 reporting_opts, req_opcode, sdeb_i, supp;
2002 u16 req_sa, u;
2003 u32 alloc_len, a_len;
2004 int k, offset, len, errsts, count, bump, na;
2005 const struct opcode_info_t *oip;
2006 const struct opcode_info_t *r_oip;
2007 u8 *arr;
2008 u8 *cmd = scp->cmnd;
2009
2010 rctd = !!(cmd[2] & 0x80);
2011 reporting_opts = cmd[2] & 0x7;
2012 req_opcode = cmd[3];
2013 req_sa = get_unaligned_be16(cmd + 4);
2014 alloc_len = get_unaligned_be32(cmd + 6);
2015 if (alloc_len < 4 || alloc_len > 0xffff) {
2016 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
2017 return check_condition_result;
2018 }
2019 if (alloc_len > 8192)
2020 a_len = 8192;
2021 else
2022 a_len = alloc_len;
2023 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC);
2024 if (NULL == arr) {
2025 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
2026 INSUFF_RES_ASCQ);
2027 return check_condition_result;
2028 }
2029 switch (reporting_opts) {
2030 case 0: /* all commands */
2031 /* count number of commands */
2032 for (count = 0, oip = opcode_info_arr;
2033 oip->num_attached != 0xff; ++oip) {
2034 if (F_INV_OP & oip->flags)
2035 continue;
2036 count += (oip->num_attached + 1);
2037 }
2038 bump = rctd ? 20 : 8;
2039 put_unaligned_be32(count * bump, arr);
2040 for (offset = 4, oip = opcode_info_arr;
2041 oip->num_attached != 0xff && offset < a_len; ++oip) {
2042 if (F_INV_OP & oip->flags)
2043 continue;
2044 na = oip->num_attached;
2045 arr[offset] = oip->opcode;
2046 put_unaligned_be16(oip->sa, arr + offset + 2);
2047 if (rctd)
2048 arr[offset + 5] |= 0x2;
2049 if (FF_SA & oip->flags)
2050 arr[offset + 5] |= 0x1;
2051 put_unaligned_be16(oip->len_mask[0], arr + offset + 6);
2052 if (rctd)
2053 put_unaligned_be16(0xa, arr + offset + 8);
2054 r_oip = oip;
2055 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) {
2056 if (F_INV_OP & oip->flags)
2057 continue;
2058 offset += bump;
2059 arr[offset] = oip->opcode;
2060 put_unaligned_be16(oip->sa, arr + offset + 2);
2061 if (rctd)
2062 arr[offset + 5] |= 0x2;
2063 if (FF_SA & oip->flags)
2064 arr[offset + 5] |= 0x1;
2065 put_unaligned_be16(oip->len_mask[0],
2066 arr + offset + 6);
2067 if (rctd)
2068 put_unaligned_be16(0xa,
2069 arr + offset + 8);
2070 }
2071 oip = r_oip;
2072 offset += bump;
2073 }
2074 break;
2075 case 1: /* one command: opcode only */
2076 case 2: /* one command: opcode plus service action */
2077 case 3: /* one command: if sa==0 then opcode only else opcode+sa */
2078 sdeb_i = opcode_ind_arr[req_opcode];
2079 oip = &opcode_info_arr[sdeb_i];
2080 if (F_INV_OP & oip->flags) {
2081 supp = 1;
2082 offset = 4;
2083 } else {
2084 if (1 == reporting_opts) {
2085 if (FF_SA & oip->flags) {
2086 mk_sense_invalid_fld(scp, SDEB_IN_CDB,
2087 2, 2);
2088 kfree(arr);
2089 return check_condition_result;
2090 }
2091 req_sa = 0;
2092 } else if (2 == reporting_opts &&
2093 0 == (FF_SA & oip->flags)) {
2094 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
2095 kfree(arr); /* point at requested sa */
2096 return check_condition_result;
2097 }
2098 if (0 == (FF_SA & oip->flags) &&
2099 req_opcode == oip->opcode)
2100 supp = 3;
2101 else if (0 == (FF_SA & oip->flags)) {
2102 na = oip->num_attached;
2103 for (k = 0, oip = oip->arrp; k < na;
2104 ++k, ++oip) {
2105 if (req_opcode == oip->opcode)
2106 break;
2107 }
2108 supp = (k >= na) ? 1 : 3;
2109 } else if (req_sa != oip->sa) {
2110 na = oip->num_attached;
2111 for (k = 0, oip = oip->arrp; k < na;
2112 ++k, ++oip) {
2113 if (req_sa == oip->sa)
2114 break;
2115 }
2116 supp = (k >= na) ? 1 : 3;
2117 } else
2118 supp = 3;
2119 if (3 == supp) {
2120 u = oip->len_mask[0];
2121 put_unaligned_be16(u, arr + 2);
2122 arr[4] = oip->opcode;
2123 for (k = 1; k < u; ++k)
2124 arr[4 + k] = (k < 16) ?
2125 oip->len_mask[k] : 0xff;
2126 offset = 4 + u;
2127 } else
2128 offset = 4;
2129 }
2130 arr[1] = (rctd ? 0x80 : 0) | supp;
2131 if (rctd) {
2132 put_unaligned_be16(0xa, arr + offset);
2133 offset += 12;
2134 }
2135 break;
2136 default:
2137 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
2138 kfree(arr);
2139 return check_condition_result;
2140 }
2141 offset = (offset < a_len) ? offset : a_len;
2142 len = (offset < alloc_len) ? offset : alloc_len;
2143 errsts = fill_from_dev_buffer(scp, arr, len);
2144 kfree(arr);
2145 return errsts;
2146}
2147
2148static int resp_rsup_tmfs(struct scsi_cmnd *scp,
2149 struct sdebug_dev_info *devip)
2150{
2151 bool repd;
2152 u32 alloc_len, len;
2153 u8 arr[16];
2154 u8 *cmd = scp->cmnd;
2155
2156 memset(arr, 0, sizeof(arr));
2157 repd = !!(cmd[2] & 0x80);
2158 alloc_len = get_unaligned_be32(cmd + 6);
2159 if (alloc_len < 4) {
2160 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
2161 return check_condition_result;
2162 }
2163 arr[0] = 0xc8; /* ATS | ATSS | LURS */
2164 arr[1] = 0x1; /* ITNRS */
2165 if (repd) {
2166 arr[3] = 0xc;
2167 len = 16;
2168 } else
2169 len = 4;
2170
2171 len = (len < alloc_len) ? len : alloc_len;
2172 return fill_from_dev_buffer(scp, arr, len);
2173}
2174
2175/* <<Following mode page info copied from ST318451LW>> */
2176
2177static int resp_err_recov_pg(unsigned char *p, int pcontrol, int target)
2178{ /* Read-Write Error Recovery page for mode_sense */
2179 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
2180 5, 0, 0xff, 0xff};
2181
2182 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
2183 if (1 == pcontrol)
2184 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
2185 return sizeof(err_recov_pg);
2186}
2187
2188static int resp_disconnect_pg(unsigned char *p, int pcontrol, int target)
2189{ /* Disconnect-Reconnect page for mode_sense */
2190 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
2191 0, 0, 0, 0, 0, 0, 0, 0};
2192
2193 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
2194 if (1 == pcontrol)
2195 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
2196 return sizeof(disconnect_pg);
2197}
2198
2199static int resp_format_pg(unsigned char *p, int pcontrol, int target)
2200{ /* Format device page for mode_sense */
2201 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
2202 0, 0, 0, 0, 0, 0, 0, 0,
2203 0, 0, 0, 0, 0x40, 0, 0, 0};
2204
2205 memcpy(p, format_pg, sizeof(format_pg));
2206 put_unaligned_be16(sdebug_sectors_per, p + 10);
2207 put_unaligned_be16(sdebug_sector_size, p + 12);
2208 if (sdebug_removable)
2209 p[20] |= 0x20; /* should agree with INQUIRY */
2210 if (1 == pcontrol)
2211 memset(p + 2, 0, sizeof(format_pg) - 2);
2212 return sizeof(format_pg);
2213}
2214
2215static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
2216 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
2217 0, 0, 0, 0};
2218
2219static int resp_caching_pg(unsigned char *p, int pcontrol, int target)
2220{ /* Caching page for mode_sense */
2221 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
2222 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
2223 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
2224 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
2225
2226 if (SDEBUG_OPT_N_WCE & sdebug_opts)
2227 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
2228 memcpy(p, caching_pg, sizeof(caching_pg));
2229 if (1 == pcontrol)
2230 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
2231 else if (2 == pcontrol)
2232 memcpy(p, d_caching_pg, sizeof(d_caching_pg));
2233 return sizeof(caching_pg);
2234}
2235
2236static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
2237 0, 0, 0x2, 0x4b};
2238
2239static int resp_ctrl_m_pg(unsigned char *p, int pcontrol, int target)
2240{ /* Control mode page for mode_sense */
2241 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
2242 0, 0, 0, 0};
2243 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
2244 0, 0, 0x2, 0x4b};
2245
2246 if (sdebug_dsense)
2247 ctrl_m_pg[2] |= 0x4;
2248 else
2249 ctrl_m_pg[2] &= ~0x4;
2250
2251 if (sdebug_ato)
2252 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
2253
2254 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
2255 if (1 == pcontrol)
2256 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
2257 else if (2 == pcontrol)
2258 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
2259 return sizeof(ctrl_m_pg);
2260}
2261
2262
2263static int resp_iec_m_pg(unsigned char *p, int pcontrol, int target)
2264{ /* Informational Exceptions control mode page for mode_sense */
2265 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
2266 0, 0, 0x0, 0x0};
2267 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
2268 0, 0, 0x0, 0x0};
2269
2270 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
2271 if (1 == pcontrol)
2272 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
2273 else if (2 == pcontrol)
2274 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
2275 return sizeof(iec_m_pg);
2276}
2277
2278static int resp_sas_sf_m_pg(unsigned char *p, int pcontrol, int target)
2279{ /* SAS SSP mode page - short format for mode_sense */
2280 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
2281 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
2282
2283 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
2284 if (1 == pcontrol)
2285 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
2286 return sizeof(sas_sf_m_pg);
2287}
2288
2289
2290static int resp_sas_pcd_m_spg(unsigned char *p, int pcontrol, int target,
2291 int target_dev_id)
2292{ /* SAS phy control and discover mode page for mode_sense */
2293 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
2294 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
2295 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2296 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2297 0x2, 0, 0, 0, 0, 0, 0, 0,
2298 0x88, 0x99, 0, 0, 0, 0, 0, 0,
2299 0, 0, 0, 0, 0, 0, 0, 0,
2300 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
2301 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2302 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2303 0x3, 0, 0, 0, 0, 0, 0, 0,
2304 0x88, 0x99, 0, 0, 0, 0, 0, 0,
2305 0, 0, 0, 0, 0, 0, 0, 0,
2306 };
2307 int port_a, port_b;
2308
2309 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 16);
2310 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 24);
2311 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 64);
2312 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 72);
2313 port_a = target_dev_id + 1;
2314 port_b = port_a + 1;
2315 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
2316 put_unaligned_be32(port_a, p + 20);
2317 put_unaligned_be32(port_b, p + 48 + 20);
2318 if (1 == pcontrol)
2319 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
2320 return sizeof(sas_pcd_m_pg);
2321}
2322
2323static int resp_sas_sha_m_spg(unsigned char *p, int pcontrol)
2324{ /* SAS SSP shared protocol specific port mode subpage */
2325 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
2326 0, 0, 0, 0, 0, 0, 0, 0,
2327 };
2328
2329 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
2330 if (1 == pcontrol)
2331 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
2332 return sizeof(sas_sha_m_pg);
2333}
2334
2335#define SDEBUG_MAX_MSENSE_SZ 256
2336
2337static int resp_mode_sense(struct scsi_cmnd *scp,
2338 struct sdebug_dev_info *devip)
2339{
2340 int pcontrol, pcode, subpcode, bd_len;
2341 unsigned char dev_spec;
2342 u32 alloc_len, offset, len;
2343 int target_dev_id;
2344 int target = scp->device->id;
2345 unsigned char *ap;
2346 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
2347 unsigned char *cmd = scp->cmnd;
2348 bool dbd, llbaa, msense_6, is_disk, is_zbc, bad_pcode;
2349
2350 dbd = !!(cmd[1] & 0x8); /* disable block descriptors */
2351 pcontrol = (cmd[2] & 0xc0) >> 6;
2352 pcode = cmd[2] & 0x3f;
2353 subpcode = cmd[3];
2354 msense_6 = (MODE_SENSE == cmd[0]);
2355 llbaa = msense_6 ? false : !!(cmd[1] & 0x10);
2356 is_disk = (sdebug_ptype == TYPE_DISK);
2357 is_zbc = (devip->zmodel != BLK_ZONED_NONE);
2358 if ((is_disk || is_zbc) && !dbd)
2359 bd_len = llbaa ? 16 : 8;
2360 else
2361 bd_len = 0;
2362 alloc_len = msense_6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2363 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
2364 if (0x3 == pcontrol) { /* Saving values not supported */
2365 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
2366 return check_condition_result;
2367 }
2368 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
2369 (devip->target * 1000) - 3;
2370 /* for disks+zbc set DPOFUA bit and clear write protect (WP) bit */
2371 if (is_disk || is_zbc) {
2372 dev_spec = 0x10; /* =0x90 if WP=1 implies read-only */
2373 if (sdebug_wp)
2374 dev_spec |= 0x80;
2375 } else
2376 dev_spec = 0x0;
2377 if (msense_6) {
2378 arr[2] = dev_spec;
2379 arr[3] = bd_len;
2380 offset = 4;
2381 } else {
2382 arr[3] = dev_spec;
2383 if (16 == bd_len)
2384 arr[4] = 0x1; /* set LONGLBA bit */
2385 arr[7] = bd_len; /* assume 255 or less */
2386 offset = 8;
2387 }
2388 ap = arr + offset;
2389 if ((bd_len > 0) && (!sdebug_capacity))
2390 sdebug_capacity = get_sdebug_capacity();
2391
2392 if (8 == bd_len) {
2393 if (sdebug_capacity > 0xfffffffe)
2394 put_unaligned_be32(0xffffffff, ap + 0);
2395 else
2396 put_unaligned_be32(sdebug_capacity, ap + 0);
2397 put_unaligned_be16(sdebug_sector_size, ap + 6);
2398 offset += bd_len;
2399 ap = arr + offset;
2400 } else if (16 == bd_len) {
2401 put_unaligned_be64((u64)sdebug_capacity, ap + 0);
2402 put_unaligned_be32(sdebug_sector_size, ap + 12);
2403 offset += bd_len;
2404 ap = arr + offset;
2405 }
2406
2407 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
2408 /* TODO: Control Extension page */
2409 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2410 return check_condition_result;
2411 }
2412 bad_pcode = false;
2413
2414 switch (pcode) {
2415 case 0x1: /* Read-Write error recovery page, direct access */
2416 len = resp_err_recov_pg(ap, pcontrol, target);
2417 offset += len;
2418 break;
2419 case 0x2: /* Disconnect-Reconnect page, all devices */
2420 len = resp_disconnect_pg(ap, pcontrol, target);
2421 offset += len;
2422 break;
2423 case 0x3: /* Format device page, direct access */
2424 if (is_disk) {
2425 len = resp_format_pg(ap, pcontrol, target);
2426 offset += len;
2427 } else
2428 bad_pcode = true;
2429 break;
2430 case 0x8: /* Caching page, direct access */
2431 if (is_disk || is_zbc) {
2432 len = resp_caching_pg(ap, pcontrol, target);
2433 offset += len;
2434 } else
2435 bad_pcode = true;
2436 break;
2437 case 0xa: /* Control Mode page, all devices */
2438 len = resp_ctrl_m_pg(ap, pcontrol, target);
2439 offset += len;
2440 break;
2441 case 0x19: /* if spc==1 then sas phy, control+discover */
2442 if ((subpcode > 0x2) && (subpcode < 0xff)) {
2443 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2444 return check_condition_result;
2445 }
2446 len = 0;
2447 if ((0x0 == subpcode) || (0xff == subpcode))
2448 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2449 if ((0x1 == subpcode) || (0xff == subpcode))
2450 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
2451 target_dev_id);
2452 if ((0x2 == subpcode) || (0xff == subpcode))
2453 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2454 offset += len;
2455 break;
2456 case 0x1c: /* Informational Exceptions Mode page, all devices */
2457 len = resp_iec_m_pg(ap, pcontrol, target);
2458 offset += len;
2459 break;
2460 case 0x3f: /* Read all Mode pages */
2461 if ((0 == subpcode) || (0xff == subpcode)) {
2462 len = resp_err_recov_pg(ap, pcontrol, target);
2463 len += resp_disconnect_pg(ap + len, pcontrol, target);
2464 if (is_disk) {
2465 len += resp_format_pg(ap + len, pcontrol,
2466 target);
2467 len += resp_caching_pg(ap + len, pcontrol,
2468 target);
2469 } else if (is_zbc) {
2470 len += resp_caching_pg(ap + len, pcontrol,
2471 target);
2472 }
2473 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
2474 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2475 if (0xff == subpcode) {
2476 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
2477 target, target_dev_id);
2478 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2479 }
2480 len += resp_iec_m_pg(ap + len, pcontrol, target);
2481 offset += len;
2482 } else {
2483 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2484 return check_condition_result;
2485 }
2486 break;
2487 default:
2488 bad_pcode = true;
2489 break;
2490 }
2491 if (bad_pcode) {
2492 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2493 return check_condition_result;
2494 }
2495 if (msense_6)
2496 arr[0] = offset - 1;
2497 else
2498 put_unaligned_be16((offset - 2), arr + 0);
2499 return fill_from_dev_buffer(scp, arr, min_t(u32, alloc_len, offset));
2500}
2501
2502#define SDEBUG_MAX_MSELECT_SZ 512
2503
2504static int resp_mode_select(struct scsi_cmnd *scp,
2505 struct sdebug_dev_info *devip)
2506{
2507 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
2508 int param_len, res, mpage;
2509 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
2510 unsigned char *cmd = scp->cmnd;
2511 int mselect6 = (MODE_SELECT == cmd[0]);
2512
2513 memset(arr, 0, sizeof(arr));
2514 pf = cmd[1] & 0x10;
2515 sp = cmd[1] & 0x1;
2516 param_len = mselect6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2517 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
2518 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1);
2519 return check_condition_result;
2520 }
2521 res = fetch_to_dev_buffer(scp, arr, param_len);
2522 if (-1 == res)
2523 return DID_ERROR << 16;
2524 else if (sdebug_verbose && (res < param_len))
2525 sdev_printk(KERN_INFO, scp->device,
2526 "%s: cdb indicated=%d, IO sent=%d bytes\n",
2527 __func__, param_len, res);
2528 md_len = mselect6 ? (arr[0] + 1) : (get_unaligned_be16(arr + 0) + 2);
2529 bd_len = mselect6 ? arr[3] : get_unaligned_be16(arr + 6);
2530 off = bd_len + (mselect6 ? 4 : 8);
2531 if (md_len > 2 || off >= res) {
2532 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1);
2533 return check_condition_result;
2534 }
2535 mpage = arr[off] & 0x3f;
2536 ps = !!(arr[off] & 0x80);
2537 if (ps) {
2538 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7);
2539 return check_condition_result;
2540 }
2541 spf = !!(arr[off] & 0x40);
2542 pg_len = spf ? (get_unaligned_be16(arr + off + 2) + 4) :
2543 (arr[off + 1] + 2);
2544 if ((pg_len + off) > param_len) {
2545 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2546 PARAMETER_LIST_LENGTH_ERR, 0);
2547 return check_condition_result;
2548 }
2549 switch (mpage) {
2550 case 0x8: /* Caching Mode page */
2551 if (caching_pg[1] == arr[off + 1]) {
2552 memcpy(caching_pg + 2, arr + off + 2,
2553 sizeof(caching_pg) - 2);
2554 goto set_mode_changed_ua;
2555 }
2556 break;
2557 case 0xa: /* Control Mode page */
2558 if (ctrl_m_pg[1] == arr[off + 1]) {
2559 memcpy(ctrl_m_pg + 2, arr + off + 2,
2560 sizeof(ctrl_m_pg) - 2);
2561 if (ctrl_m_pg[4] & 0x8)
2562 sdebug_wp = true;
2563 else
2564 sdebug_wp = false;
2565 sdebug_dsense = !!(ctrl_m_pg[2] & 0x4);
2566 goto set_mode_changed_ua;
2567 }
2568 break;
2569 case 0x1c: /* Informational Exceptions Mode page */
2570 if (iec_m_pg[1] == arr[off + 1]) {
2571 memcpy(iec_m_pg + 2, arr + off + 2,
2572 sizeof(iec_m_pg) - 2);
2573 goto set_mode_changed_ua;
2574 }
2575 break;
2576 default:
2577 break;
2578 }
2579 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5);
2580 return check_condition_result;
2581set_mode_changed_ua:
2582 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
2583 return 0;
2584}
2585
2586static int resp_temp_l_pg(unsigned char *arr)
2587{
2588 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
2589 0x0, 0x1, 0x3, 0x2, 0x0, 65,
2590 };
2591
2592 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
2593 return sizeof(temp_l_pg);
2594}
2595
2596static int resp_ie_l_pg(unsigned char *arr)
2597{
2598 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
2599 };
2600
2601 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
2602 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
2603 arr[4] = THRESHOLD_EXCEEDED;
2604 arr[5] = 0xff;
2605 }
2606 return sizeof(ie_l_pg);
2607}
2608
2609static int resp_env_rep_l_spg(unsigned char *arr)
2610{
2611 unsigned char env_rep_l_spg[] = {0x0, 0x0, 0x23, 0x8,
2612 0x0, 40, 72, 0xff, 45, 18, 0, 0,
2613 0x1, 0x0, 0x23, 0x8,
2614 0x0, 55, 72, 35, 55, 45, 0, 0,
2615 };
2616
2617 memcpy(arr, env_rep_l_spg, sizeof(env_rep_l_spg));
2618 return sizeof(env_rep_l_spg);
2619}
2620
2621#define SDEBUG_MAX_LSENSE_SZ 512
2622
2623static int resp_log_sense(struct scsi_cmnd *scp,
2624 struct sdebug_dev_info *devip)
2625{
2626 int ppc, sp, pcode, subpcode;
2627 u32 alloc_len, len, n;
2628 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
2629 unsigned char *cmd = scp->cmnd;
2630
2631 memset(arr, 0, sizeof(arr));
2632 ppc = cmd[1] & 0x2;
2633 sp = cmd[1] & 0x1;
2634 if (ppc || sp) {
2635 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0);
2636 return check_condition_result;
2637 }
2638 pcode = cmd[2] & 0x3f;
2639 subpcode = cmd[3] & 0xff;
2640 alloc_len = get_unaligned_be16(cmd + 7);
2641 arr[0] = pcode;
2642 if (0 == subpcode) {
2643 switch (pcode) {
2644 case 0x0: /* Supported log pages log page */
2645 n = 4;
2646 arr[n++] = 0x0; /* this page */
2647 arr[n++] = 0xd; /* Temperature */
2648 arr[n++] = 0x2f; /* Informational exceptions */
2649 arr[3] = n - 4;
2650 break;
2651 case 0xd: /* Temperature log page */
2652 arr[3] = resp_temp_l_pg(arr + 4);
2653 break;
2654 case 0x2f: /* Informational exceptions log page */
2655 arr[3] = resp_ie_l_pg(arr + 4);
2656 break;
2657 default:
2658 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2659 return check_condition_result;
2660 }
2661 } else if (0xff == subpcode) {
2662 arr[0] |= 0x40;
2663 arr[1] = subpcode;
2664 switch (pcode) {
2665 case 0x0: /* Supported log pages and subpages log page */
2666 n = 4;
2667 arr[n++] = 0x0;
2668 arr[n++] = 0x0; /* 0,0 page */
2669 arr[n++] = 0x0;
2670 arr[n++] = 0xff; /* this page */
2671 arr[n++] = 0xd;
2672 arr[n++] = 0x0; /* Temperature */
2673 arr[n++] = 0xd;
2674 arr[n++] = 0x1; /* Environment reporting */
2675 arr[n++] = 0xd;
2676 arr[n++] = 0xff; /* all 0xd subpages */
2677 arr[n++] = 0x2f;
2678 arr[n++] = 0x0; /* Informational exceptions */
2679 arr[n++] = 0x2f;
2680 arr[n++] = 0xff; /* all 0x2f subpages */
2681 arr[3] = n - 4;
2682 break;
2683 case 0xd: /* Temperature subpages */
2684 n = 4;
2685 arr[n++] = 0xd;
2686 arr[n++] = 0x0; /* Temperature */
2687 arr[n++] = 0xd;
2688 arr[n++] = 0x1; /* Environment reporting */
2689 arr[n++] = 0xd;
2690 arr[n++] = 0xff; /* these subpages */
2691 arr[3] = n - 4;
2692 break;
2693 case 0x2f: /* Informational exceptions subpages */
2694 n = 4;
2695 arr[n++] = 0x2f;
2696 arr[n++] = 0x0; /* Informational exceptions */
2697 arr[n++] = 0x2f;
2698 arr[n++] = 0xff; /* these subpages */
2699 arr[3] = n - 4;
2700 break;
2701 default:
2702 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2703 return check_condition_result;
2704 }
2705 } else if (subpcode > 0) {
2706 arr[0] |= 0x40;
2707 arr[1] = subpcode;
2708 if (pcode == 0xd && subpcode == 1)
2709 arr[3] = resp_env_rep_l_spg(arr + 4);
2710 else {
2711 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2712 return check_condition_result;
2713 }
2714 } else {
2715 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2716 return check_condition_result;
2717 }
2718 len = min_t(u32, get_unaligned_be16(arr + 2) + 4, alloc_len);
2719 return fill_from_dev_buffer(scp, arr,
2720 min_t(u32, len, SDEBUG_MAX_INQ_ARR_SZ));
2721}
2722
2723static inline bool sdebug_dev_is_zoned(struct sdebug_dev_info *devip)
2724{
2725 return devip->nr_zones != 0;
2726}
2727
2728static struct sdeb_zone_state *zbc_zone(struct sdebug_dev_info *devip,
2729 unsigned long long lba)
2730{
2731 u32 zno = lba >> devip->zsize_shift;
2732 struct sdeb_zone_state *zsp;
2733
2734 if (devip->zcap == devip->zsize || zno < devip->nr_conv_zones)
2735 return &devip->zstate[zno];
2736
2737 /*
2738 * If the zone capacity is less than the zone size, adjust for gap
2739 * zones.
2740 */
2741 zno = 2 * zno - devip->nr_conv_zones;
2742 WARN_ONCE(zno >= devip->nr_zones, "%u > %u\n", zno, devip->nr_zones);
2743 zsp = &devip->zstate[zno];
2744 if (lba >= zsp->z_start + zsp->z_size)
2745 zsp++;
2746 WARN_ON_ONCE(lba >= zsp->z_start + zsp->z_size);
2747 return zsp;
2748}
2749
2750static inline bool zbc_zone_is_conv(struct sdeb_zone_state *zsp)
2751{
2752 return zsp->z_type == ZBC_ZTYPE_CNV;
2753}
2754
2755static inline bool zbc_zone_is_gap(struct sdeb_zone_state *zsp)
2756{
2757 return zsp->z_type == ZBC_ZTYPE_GAP;
2758}
2759
2760static inline bool zbc_zone_is_seq(struct sdeb_zone_state *zsp)
2761{
2762 return !zbc_zone_is_conv(zsp) && !zbc_zone_is_gap(zsp);
2763}
2764
2765static void zbc_close_zone(struct sdebug_dev_info *devip,
2766 struct sdeb_zone_state *zsp)
2767{
2768 enum sdebug_z_cond zc;
2769
2770 if (!zbc_zone_is_seq(zsp))
2771 return;
2772
2773 zc = zsp->z_cond;
2774 if (!(zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN))
2775 return;
2776
2777 if (zc == ZC2_IMPLICIT_OPEN)
2778 devip->nr_imp_open--;
2779 else
2780 devip->nr_exp_open--;
2781
2782 if (zsp->z_wp == zsp->z_start) {
2783 zsp->z_cond = ZC1_EMPTY;
2784 } else {
2785 zsp->z_cond = ZC4_CLOSED;
2786 devip->nr_closed++;
2787 }
2788}
2789
2790static void zbc_close_imp_open_zone(struct sdebug_dev_info *devip)
2791{
2792 struct sdeb_zone_state *zsp = &devip->zstate[0];
2793 unsigned int i;
2794
2795 for (i = 0; i < devip->nr_zones; i++, zsp++) {
2796 if (zsp->z_cond == ZC2_IMPLICIT_OPEN) {
2797 zbc_close_zone(devip, zsp);
2798 return;
2799 }
2800 }
2801}
2802
2803static void zbc_open_zone(struct sdebug_dev_info *devip,
2804 struct sdeb_zone_state *zsp, bool explicit)
2805{
2806 enum sdebug_z_cond zc;
2807
2808 if (!zbc_zone_is_seq(zsp))
2809 return;
2810
2811 zc = zsp->z_cond;
2812 if ((explicit && zc == ZC3_EXPLICIT_OPEN) ||
2813 (!explicit && zc == ZC2_IMPLICIT_OPEN))
2814 return;
2815
2816 /* Close an implicit open zone if necessary */
2817 if (explicit && zsp->z_cond == ZC2_IMPLICIT_OPEN)
2818 zbc_close_zone(devip, zsp);
2819 else if (devip->max_open &&
2820 devip->nr_imp_open + devip->nr_exp_open >= devip->max_open)
2821 zbc_close_imp_open_zone(devip);
2822
2823 if (zsp->z_cond == ZC4_CLOSED)
2824 devip->nr_closed--;
2825 if (explicit) {
2826 zsp->z_cond = ZC3_EXPLICIT_OPEN;
2827 devip->nr_exp_open++;
2828 } else {
2829 zsp->z_cond = ZC2_IMPLICIT_OPEN;
2830 devip->nr_imp_open++;
2831 }
2832}
2833
2834static inline void zbc_set_zone_full(struct sdebug_dev_info *devip,
2835 struct sdeb_zone_state *zsp)
2836{
2837 switch (zsp->z_cond) {
2838 case ZC2_IMPLICIT_OPEN:
2839 devip->nr_imp_open--;
2840 break;
2841 case ZC3_EXPLICIT_OPEN:
2842 devip->nr_exp_open--;
2843 break;
2844 default:
2845 WARN_ONCE(true, "Invalid zone %llu condition %x\n",
2846 zsp->z_start, zsp->z_cond);
2847 break;
2848 }
2849 zsp->z_cond = ZC5_FULL;
2850}
2851
2852static void zbc_inc_wp(struct sdebug_dev_info *devip,
2853 unsigned long long lba, unsigned int num)
2854{
2855 struct sdeb_zone_state *zsp = zbc_zone(devip, lba);
2856 unsigned long long n, end, zend = zsp->z_start + zsp->z_size;
2857
2858 if (!zbc_zone_is_seq(zsp))
2859 return;
2860
2861 if (zsp->z_type == ZBC_ZTYPE_SWR) {
2862 zsp->z_wp += num;
2863 if (zsp->z_wp >= zend)
2864 zbc_set_zone_full(devip, zsp);
2865 return;
2866 }
2867
2868 while (num) {
2869 if (lba != zsp->z_wp)
2870 zsp->z_non_seq_resource = true;
2871
2872 end = lba + num;
2873 if (end >= zend) {
2874 n = zend - lba;
2875 zsp->z_wp = zend;
2876 } else if (end > zsp->z_wp) {
2877 n = num;
2878 zsp->z_wp = end;
2879 } else {
2880 n = num;
2881 }
2882 if (zsp->z_wp >= zend)
2883 zbc_set_zone_full(devip, zsp);
2884
2885 num -= n;
2886 lba += n;
2887 if (num) {
2888 zsp++;
2889 zend = zsp->z_start + zsp->z_size;
2890 }
2891 }
2892}
2893
2894static int check_zbc_access_params(struct scsi_cmnd *scp,
2895 unsigned long long lba, unsigned int num, bool write)
2896{
2897 struct scsi_device *sdp = scp->device;
2898 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
2899 struct sdeb_zone_state *zsp = zbc_zone(devip, lba);
2900 struct sdeb_zone_state *zsp_end = zbc_zone(devip, lba + num - 1);
2901
2902 if (!write) {
2903 if (devip->zmodel == BLK_ZONED_HA)
2904 return 0;
2905 /* For host-managed, reads cannot cross zone types boundaries */
2906 if (zsp->z_type != zsp_end->z_type) {
2907 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2908 LBA_OUT_OF_RANGE,
2909 READ_INVDATA_ASCQ);
2910 return check_condition_result;
2911 }
2912 return 0;
2913 }
2914
2915 /* Writing into a gap zone is not allowed */
2916 if (zbc_zone_is_gap(zsp)) {
2917 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE,
2918 ATTEMPT_ACCESS_GAP);
2919 return check_condition_result;
2920 }
2921
2922 /* No restrictions for writes within conventional zones */
2923 if (zbc_zone_is_conv(zsp)) {
2924 if (!zbc_zone_is_conv(zsp_end)) {
2925 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2926 LBA_OUT_OF_RANGE,
2927 WRITE_BOUNDARY_ASCQ);
2928 return check_condition_result;
2929 }
2930 return 0;
2931 }
2932
2933 if (zsp->z_type == ZBC_ZTYPE_SWR) {
2934 /* Writes cannot cross sequential zone boundaries */
2935 if (zsp_end != zsp) {
2936 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2937 LBA_OUT_OF_RANGE,
2938 WRITE_BOUNDARY_ASCQ);
2939 return check_condition_result;
2940 }
2941 /* Cannot write full zones */
2942 if (zsp->z_cond == ZC5_FULL) {
2943 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2944 INVALID_FIELD_IN_CDB, 0);
2945 return check_condition_result;
2946 }
2947 /* Writes must be aligned to the zone WP */
2948 if (lba != zsp->z_wp) {
2949 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2950 LBA_OUT_OF_RANGE,
2951 UNALIGNED_WRITE_ASCQ);
2952 return check_condition_result;
2953 }
2954 }
2955
2956 /* Handle implicit open of closed and empty zones */
2957 if (zsp->z_cond == ZC1_EMPTY || zsp->z_cond == ZC4_CLOSED) {
2958 if (devip->max_open &&
2959 devip->nr_exp_open >= devip->max_open) {
2960 mk_sense_buffer(scp, DATA_PROTECT,
2961 INSUFF_RES_ASC,
2962 INSUFF_ZONE_ASCQ);
2963 return check_condition_result;
2964 }
2965 zbc_open_zone(devip, zsp, false);
2966 }
2967
2968 return 0;
2969}
2970
2971static inline int check_device_access_params
2972 (struct scsi_cmnd *scp, unsigned long long lba,
2973 unsigned int num, bool write)
2974{
2975 struct scsi_device *sdp = scp->device;
2976 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
2977
2978 if (lba + num > sdebug_capacity) {
2979 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2980 return check_condition_result;
2981 }
2982 /* transfer length excessive (tie in to block limits VPD page) */
2983 if (num > sdebug_store_sectors) {
2984 /* needs work to find which cdb byte 'num' comes from */
2985 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2986 return check_condition_result;
2987 }
2988 if (write && unlikely(sdebug_wp)) {
2989 mk_sense_buffer(scp, DATA_PROTECT, WRITE_PROTECTED, 0x2);
2990 return check_condition_result;
2991 }
2992 if (sdebug_dev_is_zoned(devip))
2993 return check_zbc_access_params(scp, lba, num, write);
2994
2995 return 0;
2996}
2997
2998/*
2999 * Note: if BUG_ON() fires it usually indicates a problem with the parser
3000 * tables. Perhaps a missing F_FAKE_RW or FF_MEDIA_IO flag. Response functions
3001 * that access any of the "stores" in struct sdeb_store_info should call this
3002 * function with bug_if_fake_rw set to true.
3003 */
3004static inline struct sdeb_store_info *devip2sip(struct sdebug_dev_info *devip,
3005 bool bug_if_fake_rw)
3006{
3007 if (sdebug_fake_rw) {
3008 BUG_ON(bug_if_fake_rw); /* See note above */
3009 return NULL;
3010 }
3011 return xa_load(per_store_ap, devip->sdbg_host->si_idx);
3012}
3013
3014/* Returns number of bytes copied or -1 if error. */
3015static int do_device_access(struct sdeb_store_info *sip, struct scsi_cmnd *scp,
3016 u32 sg_skip, u64 lba, u32 num, bool do_write)
3017{
3018 int ret;
3019 u64 block, rest = 0;
3020 enum dma_data_direction dir;
3021 struct scsi_data_buffer *sdb = &scp->sdb;
3022 u8 *fsp;
3023
3024 if (do_write) {
3025 dir = DMA_TO_DEVICE;
3026 write_since_sync = true;
3027 } else {
3028 dir = DMA_FROM_DEVICE;
3029 }
3030
3031 if (!sdb->length || !sip)
3032 return 0;
3033 if (scp->sc_data_direction != dir)
3034 return -1;
3035 fsp = sip->storep;
3036
3037 block = do_div(lba, sdebug_store_sectors);
3038 if (block + num > sdebug_store_sectors)
3039 rest = block + num - sdebug_store_sectors;
3040
3041 ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
3042 fsp + (block * sdebug_sector_size),
3043 (num - rest) * sdebug_sector_size, sg_skip, do_write);
3044 if (ret != (num - rest) * sdebug_sector_size)
3045 return ret;
3046
3047 if (rest) {
3048 ret += sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
3049 fsp, rest * sdebug_sector_size,
3050 sg_skip + ((num - rest) * sdebug_sector_size),
3051 do_write);
3052 }
3053
3054 return ret;
3055}
3056
3057/* Returns number of bytes copied or -1 if error. */
3058static int do_dout_fetch(struct scsi_cmnd *scp, u32 num, u8 *doutp)
3059{
3060 struct scsi_data_buffer *sdb = &scp->sdb;
3061
3062 if (!sdb->length)
3063 return 0;
3064 if (scp->sc_data_direction != DMA_TO_DEVICE)
3065 return -1;
3066 return sg_copy_buffer(sdb->table.sgl, sdb->table.nents, doutp,
3067 num * sdebug_sector_size, 0, true);
3068}
3069
3070/* If sip->storep+lba compares equal to arr(num), then copy top half of
3071 * arr into sip->storep+lba and return true. If comparison fails then
3072 * return false. */
3073static bool comp_write_worker(struct sdeb_store_info *sip, u64 lba, u32 num,
3074 const u8 *arr, bool compare_only)
3075{
3076 bool res;
3077 u64 block, rest = 0;
3078 u32 store_blks = sdebug_store_sectors;
3079 u32 lb_size = sdebug_sector_size;
3080 u8 *fsp = sip->storep;
3081
3082 block = do_div(lba, store_blks);
3083 if (block + num > store_blks)
3084 rest = block + num - store_blks;
3085
3086 res = !memcmp(fsp + (block * lb_size), arr, (num - rest) * lb_size);
3087 if (!res)
3088 return res;
3089 if (rest)
3090 res = memcmp(fsp, arr + ((num - rest) * lb_size),
3091 rest * lb_size);
3092 if (!res)
3093 return res;
3094 if (compare_only)
3095 return true;
3096 arr += num * lb_size;
3097 memcpy(fsp + (block * lb_size), arr, (num - rest) * lb_size);
3098 if (rest)
3099 memcpy(fsp, arr + ((num - rest) * lb_size), rest * lb_size);
3100 return res;
3101}
3102
3103static __be16 dif_compute_csum(const void *buf, int len)
3104{
3105 __be16 csum;
3106
3107 if (sdebug_guard)
3108 csum = (__force __be16)ip_compute_csum(buf, len);
3109 else
3110 csum = cpu_to_be16(crc_t10dif(buf, len));
3111
3112 return csum;
3113}
3114
3115static int dif_verify(struct t10_pi_tuple *sdt, const void *data,
3116 sector_t sector, u32 ei_lba)
3117{
3118 __be16 csum = dif_compute_csum(data, sdebug_sector_size);
3119
3120 if (sdt->guard_tag != csum) {
3121 pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
3122 (unsigned long)sector,
3123 be16_to_cpu(sdt->guard_tag),
3124 be16_to_cpu(csum));
3125 return 0x01;
3126 }
3127 if (sdebug_dif == T10_PI_TYPE1_PROTECTION &&
3128 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
3129 pr_err("REF check failed on sector %lu\n",
3130 (unsigned long)sector);
3131 return 0x03;
3132 }
3133 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3134 be32_to_cpu(sdt->ref_tag) != ei_lba) {
3135 pr_err("REF check failed on sector %lu\n",
3136 (unsigned long)sector);
3137 return 0x03;
3138 }
3139 return 0;
3140}
3141
3142static void dif_copy_prot(struct scsi_cmnd *scp, sector_t sector,
3143 unsigned int sectors, bool read)
3144{
3145 size_t resid;
3146 void *paddr;
3147 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
3148 scp->device->hostdata, true);
3149 struct t10_pi_tuple *dif_storep = sip->dif_storep;
3150 const void *dif_store_end = dif_storep + sdebug_store_sectors;
3151 struct sg_mapping_iter miter;
3152
3153 /* Bytes of protection data to copy into sgl */
3154 resid = sectors * sizeof(*dif_storep);
3155
3156 sg_miter_start(&miter, scsi_prot_sglist(scp),
3157 scsi_prot_sg_count(scp), SG_MITER_ATOMIC |
3158 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
3159
3160 while (sg_miter_next(&miter) && resid > 0) {
3161 size_t len = min_t(size_t, miter.length, resid);
3162 void *start = dif_store(sip, sector);
3163 size_t rest = 0;
3164
3165 if (dif_store_end < start + len)
3166 rest = start + len - dif_store_end;
3167
3168 paddr = miter.addr;
3169
3170 if (read)
3171 memcpy(paddr, start, len - rest);
3172 else
3173 memcpy(start, paddr, len - rest);
3174
3175 if (rest) {
3176 if (read)
3177 memcpy(paddr + len - rest, dif_storep, rest);
3178 else
3179 memcpy(dif_storep, paddr + len - rest, rest);
3180 }
3181
3182 sector += len / sizeof(*dif_storep);
3183 resid -= len;
3184 }
3185 sg_miter_stop(&miter);
3186}
3187
3188static int prot_verify_read(struct scsi_cmnd *scp, sector_t start_sec,
3189 unsigned int sectors, u32 ei_lba)
3190{
3191 int ret = 0;
3192 unsigned int i;
3193 sector_t sector;
3194 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
3195 scp->device->hostdata, true);
3196 struct t10_pi_tuple *sdt;
3197
3198 for (i = 0; i < sectors; i++, ei_lba++) {
3199 sector = start_sec + i;
3200 sdt = dif_store(sip, sector);
3201
3202 if (sdt->app_tag == cpu_to_be16(0xffff))
3203 continue;
3204
3205 /*
3206 * Because scsi_debug acts as both initiator and
3207 * target we proceed to verify the PI even if
3208 * RDPROTECT=3. This is done so the "initiator" knows
3209 * which type of error to return. Otherwise we would
3210 * have to iterate over the PI twice.
3211 */
3212 if (scp->cmnd[1] >> 5) { /* RDPROTECT */
3213 ret = dif_verify(sdt, lba2fake_store(sip, sector),
3214 sector, ei_lba);
3215 if (ret) {
3216 dif_errors++;
3217 break;
3218 }
3219 }
3220 }
3221
3222 dif_copy_prot(scp, start_sec, sectors, true);
3223 dix_reads++;
3224
3225 return ret;
3226}
3227
3228static inline void
3229sdeb_read_lock(struct sdeb_store_info *sip)
3230{
3231 if (sdebug_no_rwlock) {
3232 if (sip)
3233 __acquire(&sip->macc_lck);
3234 else
3235 __acquire(&sdeb_fake_rw_lck);
3236 } else {
3237 if (sip)
3238 read_lock(&sip->macc_lck);
3239 else
3240 read_lock(&sdeb_fake_rw_lck);
3241 }
3242}
3243
3244static inline void
3245sdeb_read_unlock(struct sdeb_store_info *sip)
3246{
3247 if (sdebug_no_rwlock) {
3248 if (sip)
3249 __release(&sip->macc_lck);
3250 else
3251 __release(&sdeb_fake_rw_lck);
3252 } else {
3253 if (sip)
3254 read_unlock(&sip->macc_lck);
3255 else
3256 read_unlock(&sdeb_fake_rw_lck);
3257 }
3258}
3259
3260static inline void
3261sdeb_write_lock(struct sdeb_store_info *sip)
3262{
3263 if (sdebug_no_rwlock) {
3264 if (sip)
3265 __acquire(&sip->macc_lck);
3266 else
3267 __acquire(&sdeb_fake_rw_lck);
3268 } else {
3269 if (sip)
3270 write_lock(&sip->macc_lck);
3271 else
3272 write_lock(&sdeb_fake_rw_lck);
3273 }
3274}
3275
3276static inline void
3277sdeb_write_unlock(struct sdeb_store_info *sip)
3278{
3279 if (sdebug_no_rwlock) {
3280 if (sip)
3281 __release(&sip->macc_lck);
3282 else
3283 __release(&sdeb_fake_rw_lck);
3284 } else {
3285 if (sip)
3286 write_unlock(&sip->macc_lck);
3287 else
3288 write_unlock(&sdeb_fake_rw_lck);
3289 }
3290}
3291
3292static int resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3293{
3294 bool check_prot;
3295 u32 num;
3296 u32 ei_lba;
3297 int ret;
3298 u64 lba;
3299 struct sdeb_store_info *sip = devip2sip(devip, true);
3300 u8 *cmd = scp->cmnd;
3301
3302 switch (cmd[0]) {
3303 case READ_16:
3304 ei_lba = 0;
3305 lba = get_unaligned_be64(cmd + 2);
3306 num = get_unaligned_be32(cmd + 10);
3307 check_prot = true;
3308 break;
3309 case READ_10:
3310 ei_lba = 0;
3311 lba = get_unaligned_be32(cmd + 2);
3312 num = get_unaligned_be16(cmd + 7);
3313 check_prot = true;
3314 break;
3315 case READ_6:
3316 ei_lba = 0;
3317 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
3318 (u32)(cmd[1] & 0x1f) << 16;
3319 num = (0 == cmd[4]) ? 256 : cmd[4];
3320 check_prot = true;
3321 break;
3322 case READ_12:
3323 ei_lba = 0;
3324 lba = get_unaligned_be32(cmd + 2);
3325 num = get_unaligned_be32(cmd + 6);
3326 check_prot = true;
3327 break;
3328 case XDWRITEREAD_10:
3329 ei_lba = 0;
3330 lba = get_unaligned_be32(cmd + 2);
3331 num = get_unaligned_be16(cmd + 7);
3332 check_prot = false;
3333 break;
3334 default: /* assume READ(32) */
3335 lba = get_unaligned_be64(cmd + 12);
3336 ei_lba = get_unaligned_be32(cmd + 20);
3337 num = get_unaligned_be32(cmd + 28);
3338 check_prot = false;
3339 break;
3340 }
3341 if (unlikely(have_dif_prot && check_prot)) {
3342 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3343 (cmd[1] & 0xe0)) {
3344 mk_sense_invalid_opcode(scp);
3345 return check_condition_result;
3346 }
3347 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3348 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3349 (cmd[1] & 0xe0) == 0)
3350 sdev_printk(KERN_ERR, scp->device, "Unprotected RD "
3351 "to DIF device\n");
3352 }
3353 if (unlikely((sdebug_opts & SDEBUG_OPT_SHORT_TRANSFER) &&
3354 atomic_read(&sdeb_inject_pending))) {
3355 num /= 2;
3356 atomic_set(&sdeb_inject_pending, 0);
3357 }
3358
3359 ret = check_device_access_params(scp, lba, num, false);
3360 if (ret)
3361 return ret;
3362 if (unlikely((SDEBUG_OPT_MEDIUM_ERR & sdebug_opts) &&
3363 (lba <= (sdebug_medium_error_start + sdebug_medium_error_count - 1)) &&
3364 ((lba + num) > sdebug_medium_error_start))) {
3365 /* claim unrecoverable read error */
3366 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
3367 /* set info field and valid bit for fixed descriptor */
3368 if (0x70 == (scp->sense_buffer[0] & 0x7f)) {
3369 scp->sense_buffer[0] |= 0x80; /* Valid bit */
3370 ret = (lba < OPT_MEDIUM_ERR_ADDR)
3371 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
3372 put_unaligned_be32(ret, scp->sense_buffer + 3);
3373 }
3374 scsi_set_resid(scp, scsi_bufflen(scp));
3375 return check_condition_result;
3376 }
3377
3378 sdeb_read_lock(sip);
3379
3380 /* DIX + T10 DIF */
3381 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3382 switch (prot_verify_read(scp, lba, num, ei_lba)) {
3383 case 1: /* Guard tag error */
3384 if (cmd[1] >> 5 != 3) { /* RDPROTECT != 3 */
3385 sdeb_read_unlock(sip);
3386 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3387 return check_condition_result;
3388 } else if (scp->prot_flags & SCSI_PROT_GUARD_CHECK) {
3389 sdeb_read_unlock(sip);
3390 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3391 return illegal_condition_result;
3392 }
3393 break;
3394 case 3: /* Reference tag error */
3395 if (cmd[1] >> 5 != 3) { /* RDPROTECT != 3 */
3396 sdeb_read_unlock(sip);
3397 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 3);
3398 return check_condition_result;
3399 } else if (scp->prot_flags & SCSI_PROT_REF_CHECK) {
3400 sdeb_read_unlock(sip);
3401 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 3);
3402 return illegal_condition_result;
3403 }
3404 break;
3405 }
3406 }
3407
3408 ret = do_device_access(sip, scp, 0, lba, num, false);
3409 sdeb_read_unlock(sip);
3410 if (unlikely(ret == -1))
3411 return DID_ERROR << 16;
3412
3413 scsi_set_resid(scp, scsi_bufflen(scp) - ret);
3414
3415 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
3416 atomic_read(&sdeb_inject_pending))) {
3417 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
3418 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
3419 atomic_set(&sdeb_inject_pending, 0);
3420 return check_condition_result;
3421 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
3422 /* Logical block guard check failed */
3423 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3424 atomic_set(&sdeb_inject_pending, 0);
3425 return illegal_condition_result;
3426 } else if (SDEBUG_OPT_DIX_ERR & sdebug_opts) {
3427 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3428 atomic_set(&sdeb_inject_pending, 0);
3429 return illegal_condition_result;
3430 }
3431 }
3432 return 0;
3433}
3434
3435static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
3436 unsigned int sectors, u32 ei_lba)
3437{
3438 int ret;
3439 struct t10_pi_tuple *sdt;
3440 void *daddr;
3441 sector_t sector = start_sec;
3442 int ppage_offset;
3443 int dpage_offset;
3444 struct sg_mapping_iter diter;
3445 struct sg_mapping_iter piter;
3446
3447 BUG_ON(scsi_sg_count(SCpnt) == 0);
3448 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
3449
3450 sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
3451 scsi_prot_sg_count(SCpnt),
3452 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
3453 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
3454 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
3455
3456 /* For each protection page */
3457 while (sg_miter_next(&piter)) {
3458 dpage_offset = 0;
3459 if (WARN_ON(!sg_miter_next(&diter))) {
3460 ret = 0x01;
3461 goto out;
3462 }
3463
3464 for (ppage_offset = 0; ppage_offset < piter.length;
3465 ppage_offset += sizeof(struct t10_pi_tuple)) {
3466 /* If we're at the end of the current
3467 * data page advance to the next one
3468 */
3469 if (dpage_offset >= diter.length) {
3470 if (WARN_ON(!sg_miter_next(&diter))) {
3471 ret = 0x01;
3472 goto out;
3473 }
3474 dpage_offset = 0;
3475 }
3476
3477 sdt = piter.addr + ppage_offset;
3478 daddr = diter.addr + dpage_offset;
3479
3480 if (SCpnt->cmnd[1] >> 5 != 3) { /* WRPROTECT */
3481 ret = dif_verify(sdt, daddr, sector, ei_lba);
3482 if (ret)
3483 goto out;
3484 }
3485
3486 sector++;
3487 ei_lba++;
3488 dpage_offset += sdebug_sector_size;
3489 }
3490 diter.consumed = dpage_offset;
3491 sg_miter_stop(&diter);
3492 }
3493 sg_miter_stop(&piter);
3494
3495 dif_copy_prot(SCpnt, start_sec, sectors, false);
3496 dix_writes++;
3497
3498 return 0;
3499
3500out:
3501 dif_errors++;
3502 sg_miter_stop(&diter);
3503 sg_miter_stop(&piter);
3504 return ret;
3505}
3506
3507static unsigned long lba_to_map_index(sector_t lba)
3508{
3509 if (sdebug_unmap_alignment)
3510 lba += sdebug_unmap_granularity - sdebug_unmap_alignment;
3511 sector_div(lba, sdebug_unmap_granularity);
3512 return lba;
3513}
3514
3515static sector_t map_index_to_lba(unsigned long index)
3516{
3517 sector_t lba = index * sdebug_unmap_granularity;
3518
3519 if (sdebug_unmap_alignment)
3520 lba -= sdebug_unmap_granularity - sdebug_unmap_alignment;
3521 return lba;
3522}
3523
3524static unsigned int map_state(struct sdeb_store_info *sip, sector_t lba,
3525 unsigned int *num)
3526{
3527 sector_t end;
3528 unsigned int mapped;
3529 unsigned long index;
3530 unsigned long next;
3531
3532 index = lba_to_map_index(lba);
3533 mapped = test_bit(index, sip->map_storep);
3534
3535 if (mapped)
3536 next = find_next_zero_bit(sip->map_storep, map_size, index);
3537 else
3538 next = find_next_bit(sip->map_storep, map_size, index);
3539
3540 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
3541 *num = end - lba;
3542 return mapped;
3543}
3544
3545static void map_region(struct sdeb_store_info *sip, sector_t lba,
3546 unsigned int len)
3547{
3548 sector_t end = lba + len;
3549
3550 while (lba < end) {
3551 unsigned long index = lba_to_map_index(lba);
3552
3553 if (index < map_size)
3554 set_bit(index, sip->map_storep);
3555
3556 lba = map_index_to_lba(index + 1);
3557 }
3558}
3559
3560static void unmap_region(struct sdeb_store_info *sip, sector_t lba,
3561 unsigned int len)
3562{
3563 sector_t end = lba + len;
3564 u8 *fsp = sip->storep;
3565
3566 while (lba < end) {
3567 unsigned long index = lba_to_map_index(lba);
3568
3569 if (lba == map_index_to_lba(index) &&
3570 lba + sdebug_unmap_granularity <= end &&
3571 index < map_size) {
3572 clear_bit(index, sip->map_storep);
3573 if (sdebug_lbprz) { /* for LBPRZ=2 return 0xff_s */
3574 memset(fsp + lba * sdebug_sector_size,
3575 (sdebug_lbprz & 1) ? 0 : 0xff,
3576 sdebug_sector_size *
3577 sdebug_unmap_granularity);
3578 }
3579 if (sip->dif_storep) {
3580 memset(sip->dif_storep + lba, 0xff,
3581 sizeof(*sip->dif_storep) *
3582 sdebug_unmap_granularity);
3583 }
3584 }
3585 lba = map_index_to_lba(index + 1);
3586 }
3587}
3588
3589static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3590{
3591 bool check_prot;
3592 u32 num;
3593 u32 ei_lba;
3594 int ret;
3595 u64 lba;
3596 struct sdeb_store_info *sip = devip2sip(devip, true);
3597 u8 *cmd = scp->cmnd;
3598
3599 switch (cmd[0]) {
3600 case WRITE_16:
3601 ei_lba = 0;
3602 lba = get_unaligned_be64(cmd + 2);
3603 num = get_unaligned_be32(cmd + 10);
3604 check_prot = true;
3605 break;
3606 case WRITE_10:
3607 ei_lba = 0;
3608 lba = get_unaligned_be32(cmd + 2);
3609 num = get_unaligned_be16(cmd + 7);
3610 check_prot = true;
3611 break;
3612 case WRITE_6:
3613 ei_lba = 0;
3614 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
3615 (u32)(cmd[1] & 0x1f) << 16;
3616 num = (0 == cmd[4]) ? 256 : cmd[4];
3617 check_prot = true;
3618 break;
3619 case WRITE_12:
3620 ei_lba = 0;
3621 lba = get_unaligned_be32(cmd + 2);
3622 num = get_unaligned_be32(cmd + 6);
3623 check_prot = true;
3624 break;
3625 case 0x53: /* XDWRITEREAD(10) */
3626 ei_lba = 0;
3627 lba = get_unaligned_be32(cmd + 2);
3628 num = get_unaligned_be16(cmd + 7);
3629 check_prot = false;
3630 break;
3631 default: /* assume WRITE(32) */
3632 lba = get_unaligned_be64(cmd + 12);
3633 ei_lba = get_unaligned_be32(cmd + 20);
3634 num = get_unaligned_be32(cmd + 28);
3635 check_prot = false;
3636 break;
3637 }
3638 if (unlikely(have_dif_prot && check_prot)) {
3639 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3640 (cmd[1] & 0xe0)) {
3641 mk_sense_invalid_opcode(scp);
3642 return check_condition_result;
3643 }
3644 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3645 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3646 (cmd[1] & 0xe0) == 0)
3647 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3648 "to DIF device\n");
3649 }
3650
3651 sdeb_write_lock(sip);
3652 ret = check_device_access_params(scp, lba, num, true);
3653 if (ret) {
3654 sdeb_write_unlock(sip);
3655 return ret;
3656 }
3657
3658 /* DIX + T10 DIF */
3659 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3660 switch (prot_verify_write(scp, lba, num, ei_lba)) {
3661 case 1: /* Guard tag error */
3662 if (scp->prot_flags & SCSI_PROT_GUARD_CHECK) {
3663 sdeb_write_unlock(sip);
3664 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3665 return illegal_condition_result;
3666 } else if (scp->cmnd[1] >> 5 != 3) { /* WRPROTECT != 3 */
3667 sdeb_write_unlock(sip);
3668 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3669 return check_condition_result;
3670 }
3671 break;
3672 case 3: /* Reference tag error */
3673 if (scp->prot_flags & SCSI_PROT_REF_CHECK) {
3674 sdeb_write_unlock(sip);
3675 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 3);
3676 return illegal_condition_result;
3677 } else if (scp->cmnd[1] >> 5 != 3) { /* WRPROTECT != 3 */
3678 sdeb_write_unlock(sip);
3679 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 3);
3680 return check_condition_result;
3681 }
3682 break;
3683 }
3684 }
3685
3686 ret = do_device_access(sip, scp, 0, lba, num, true);
3687 if (unlikely(scsi_debug_lbp()))
3688 map_region(sip, lba, num);
3689 /* If ZBC zone then bump its write pointer */
3690 if (sdebug_dev_is_zoned(devip))
3691 zbc_inc_wp(devip, lba, num);
3692 sdeb_write_unlock(sip);
3693 if (unlikely(-1 == ret))
3694 return DID_ERROR << 16;
3695 else if (unlikely(sdebug_verbose &&
3696 (ret < (num * sdebug_sector_size))))
3697 sdev_printk(KERN_INFO, scp->device,
3698 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
3699 my_name, num * sdebug_sector_size, ret);
3700
3701 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
3702 atomic_read(&sdeb_inject_pending))) {
3703 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
3704 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
3705 atomic_set(&sdeb_inject_pending, 0);
3706 return check_condition_result;
3707 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
3708 /* Logical block guard check failed */
3709 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3710 atomic_set(&sdeb_inject_pending, 0);
3711 return illegal_condition_result;
3712 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) {
3713 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3714 atomic_set(&sdeb_inject_pending, 0);
3715 return illegal_condition_result;
3716 }
3717 }
3718 return 0;
3719}
3720
3721/*
3722 * T10 has only specified WRITE SCATTERED(16) and WRITE SCATTERED(32).
3723 * No READ GATHERED yet (requires bidi or long cdb holding gather list).
3724 */
3725static int resp_write_scat(struct scsi_cmnd *scp,
3726 struct sdebug_dev_info *devip)
3727{
3728 u8 *cmd = scp->cmnd;
3729 u8 *lrdp = NULL;
3730 u8 *up;
3731 struct sdeb_store_info *sip = devip2sip(devip, true);
3732 u8 wrprotect;
3733 u16 lbdof, num_lrd, k;
3734 u32 num, num_by, bt_len, lbdof_blen, sg_off, cum_lb;
3735 u32 lb_size = sdebug_sector_size;
3736 u32 ei_lba;
3737 u64 lba;
3738 int ret, res;
3739 bool is_16;
3740 static const u32 lrd_size = 32; /* + parameter list header size */
3741
3742 if (cmd[0] == VARIABLE_LENGTH_CMD) {
3743 is_16 = false;
3744 wrprotect = (cmd[10] >> 5) & 0x7;
3745 lbdof = get_unaligned_be16(cmd + 12);
3746 num_lrd = get_unaligned_be16(cmd + 16);
3747 bt_len = get_unaligned_be32(cmd + 28);
3748 } else { /* that leaves WRITE SCATTERED(16) */
3749 is_16 = true;
3750 wrprotect = (cmd[2] >> 5) & 0x7;
3751 lbdof = get_unaligned_be16(cmd + 4);
3752 num_lrd = get_unaligned_be16(cmd + 8);
3753 bt_len = get_unaligned_be32(cmd + 10);
3754 if (unlikely(have_dif_prot)) {
3755 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3756 wrprotect) {
3757 mk_sense_invalid_opcode(scp);
3758 return illegal_condition_result;
3759 }
3760 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3761 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3762 wrprotect == 0)
3763 sdev_printk(KERN_ERR, scp->device,
3764 "Unprotected WR to DIF device\n");
3765 }
3766 }
3767 if ((num_lrd == 0) || (bt_len == 0))
3768 return 0; /* T10 says these do-nothings are not errors */
3769 if (lbdof == 0) {
3770 if (sdebug_verbose)
3771 sdev_printk(KERN_INFO, scp->device,
3772 "%s: %s: LB Data Offset field bad\n",
3773 my_name, __func__);
3774 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3775 return illegal_condition_result;
3776 }
3777 lbdof_blen = lbdof * lb_size;
3778 if ((lrd_size + (num_lrd * lrd_size)) > lbdof_blen) {
3779 if (sdebug_verbose)
3780 sdev_printk(KERN_INFO, scp->device,
3781 "%s: %s: LBA range descriptors don't fit\n",
3782 my_name, __func__);
3783 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3784 return illegal_condition_result;
3785 }
3786 lrdp = kzalloc(lbdof_blen, GFP_ATOMIC | __GFP_NOWARN);
3787 if (lrdp == NULL)
3788 return SCSI_MLQUEUE_HOST_BUSY;
3789 if (sdebug_verbose)
3790 sdev_printk(KERN_INFO, scp->device,
3791 "%s: %s: Fetch header+scatter_list, lbdof_blen=%u\n",
3792 my_name, __func__, lbdof_blen);
3793 res = fetch_to_dev_buffer(scp, lrdp, lbdof_blen);
3794 if (res == -1) {
3795 ret = DID_ERROR << 16;
3796 goto err_out;
3797 }
3798
3799 sdeb_write_lock(sip);
3800 sg_off = lbdof_blen;
3801 /* Spec says Buffer xfer Length field in number of LBs in dout */
3802 cum_lb = 0;
3803 for (k = 0, up = lrdp + lrd_size; k < num_lrd; ++k, up += lrd_size) {
3804 lba = get_unaligned_be64(up + 0);
3805 num = get_unaligned_be32(up + 8);
3806 if (sdebug_verbose)
3807 sdev_printk(KERN_INFO, scp->device,
3808 "%s: %s: k=%d LBA=0x%llx num=%u sg_off=%u\n",
3809 my_name, __func__, k, lba, num, sg_off);
3810 if (num == 0)
3811 continue;
3812 ret = check_device_access_params(scp, lba, num, true);
3813 if (ret)
3814 goto err_out_unlock;
3815 num_by = num * lb_size;
3816 ei_lba = is_16 ? 0 : get_unaligned_be32(up + 12);
3817
3818 if ((cum_lb + num) > bt_len) {
3819 if (sdebug_verbose)
3820 sdev_printk(KERN_INFO, scp->device,
3821 "%s: %s: sum of blocks > data provided\n",
3822 my_name, __func__);
3823 mk_sense_buffer(scp, ILLEGAL_REQUEST, WRITE_ERROR_ASC,
3824 0);
3825 ret = illegal_condition_result;
3826 goto err_out_unlock;
3827 }
3828
3829 /* DIX + T10 DIF */
3830 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3831 int prot_ret = prot_verify_write(scp, lba, num,
3832 ei_lba);
3833
3834 if (prot_ret) {
3835 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10,
3836 prot_ret);
3837 ret = illegal_condition_result;
3838 goto err_out_unlock;
3839 }
3840 }
3841
3842 ret = do_device_access(sip, scp, sg_off, lba, num, true);
3843 /* If ZBC zone then bump its write pointer */
3844 if (sdebug_dev_is_zoned(devip))
3845 zbc_inc_wp(devip, lba, num);
3846 if (unlikely(scsi_debug_lbp()))
3847 map_region(sip, lba, num);
3848 if (unlikely(-1 == ret)) {
3849 ret = DID_ERROR << 16;
3850 goto err_out_unlock;
3851 } else if (unlikely(sdebug_verbose && (ret < num_by)))
3852 sdev_printk(KERN_INFO, scp->device,
3853 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
3854 my_name, num_by, ret);
3855
3856 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
3857 atomic_read(&sdeb_inject_pending))) {
3858 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
3859 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
3860 atomic_set(&sdeb_inject_pending, 0);
3861 ret = check_condition_result;
3862 goto err_out_unlock;
3863 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
3864 /* Logical block guard check failed */
3865 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3866 atomic_set(&sdeb_inject_pending, 0);
3867 ret = illegal_condition_result;
3868 goto err_out_unlock;
3869 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) {
3870 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3871 atomic_set(&sdeb_inject_pending, 0);
3872 ret = illegal_condition_result;
3873 goto err_out_unlock;
3874 }
3875 }
3876 sg_off += num_by;
3877 cum_lb += num;
3878 }
3879 ret = 0;
3880err_out_unlock:
3881 sdeb_write_unlock(sip);
3882err_out:
3883 kfree(lrdp);
3884 return ret;
3885}
3886
3887static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num,
3888 u32 ei_lba, bool unmap, bool ndob)
3889{
3890 struct scsi_device *sdp = scp->device;
3891 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
3892 unsigned long long i;
3893 u64 block, lbaa;
3894 u32 lb_size = sdebug_sector_size;
3895 int ret;
3896 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
3897 scp->device->hostdata, true);
3898 u8 *fs1p;
3899 u8 *fsp;
3900
3901 sdeb_write_lock(sip);
3902
3903 ret = check_device_access_params(scp, lba, num, true);
3904 if (ret) {
3905 sdeb_write_unlock(sip);
3906 return ret;
3907 }
3908
3909 if (unmap && scsi_debug_lbp()) {
3910 unmap_region(sip, lba, num);
3911 goto out;
3912 }
3913 lbaa = lba;
3914 block = do_div(lbaa, sdebug_store_sectors);
3915 /* if ndob then zero 1 logical block, else fetch 1 logical block */
3916 fsp = sip->storep;
3917 fs1p = fsp + (block * lb_size);
3918 if (ndob) {
3919 memset(fs1p, 0, lb_size);
3920 ret = 0;
3921 } else
3922 ret = fetch_to_dev_buffer(scp, fs1p, lb_size);
3923
3924 if (-1 == ret) {
3925 sdeb_write_unlock(sip);
3926 return DID_ERROR << 16;
3927 } else if (sdebug_verbose && !ndob && (ret < lb_size))
3928 sdev_printk(KERN_INFO, scp->device,
3929 "%s: %s: lb size=%u, IO sent=%d bytes\n",
3930 my_name, "write same", lb_size, ret);
3931
3932 /* Copy first sector to remaining blocks */
3933 for (i = 1 ; i < num ; i++) {
3934 lbaa = lba + i;
3935 block = do_div(lbaa, sdebug_store_sectors);
3936 memmove(fsp + (block * lb_size), fs1p, lb_size);
3937 }
3938 if (scsi_debug_lbp())
3939 map_region(sip, lba, num);
3940 /* If ZBC zone then bump its write pointer */
3941 if (sdebug_dev_is_zoned(devip))
3942 zbc_inc_wp(devip, lba, num);
3943out:
3944 sdeb_write_unlock(sip);
3945
3946 return 0;
3947}
3948
3949static int resp_write_same_10(struct scsi_cmnd *scp,
3950 struct sdebug_dev_info *devip)
3951{
3952 u8 *cmd = scp->cmnd;
3953 u32 lba;
3954 u16 num;
3955 u32 ei_lba = 0;
3956 bool unmap = false;
3957
3958 if (cmd[1] & 0x8) {
3959 if (sdebug_lbpws10 == 0) {
3960 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3961 return check_condition_result;
3962 } else
3963 unmap = true;
3964 }
3965 lba = get_unaligned_be32(cmd + 2);
3966 num = get_unaligned_be16(cmd + 7);
3967 if (num > sdebug_write_same_length) {
3968 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3969 return check_condition_result;
3970 }
3971 return resp_write_same(scp, lba, num, ei_lba, unmap, false);
3972}
3973
3974static int resp_write_same_16(struct scsi_cmnd *scp,
3975 struct sdebug_dev_info *devip)
3976{
3977 u8 *cmd = scp->cmnd;
3978 u64 lba;
3979 u32 num;
3980 u32 ei_lba = 0;
3981 bool unmap = false;
3982 bool ndob = false;
3983
3984 if (cmd[1] & 0x8) { /* UNMAP */
3985 if (sdebug_lbpws == 0) {
3986 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3987 return check_condition_result;
3988 } else
3989 unmap = true;
3990 }
3991 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */
3992 ndob = true;
3993 lba = get_unaligned_be64(cmd + 2);
3994 num = get_unaligned_be32(cmd + 10);
3995 if (num > sdebug_write_same_length) {
3996 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
3997 return check_condition_result;
3998 }
3999 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob);
4000}
4001
4002/* Note the mode field is in the same position as the (lower) service action
4003 * field. For the Report supported operation codes command, SPC-4 suggests
4004 * each mode of this command should be reported separately; for future. */
4005static int resp_write_buffer(struct scsi_cmnd *scp,
4006 struct sdebug_dev_info *devip)
4007{
4008 u8 *cmd = scp->cmnd;
4009 struct scsi_device *sdp = scp->device;
4010 struct sdebug_dev_info *dp;
4011 u8 mode;
4012
4013 mode = cmd[1] & 0x1f;
4014 switch (mode) {
4015 case 0x4: /* download microcode (MC) and activate (ACT) */
4016 /* set UAs on this device only */
4017 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
4018 set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm);
4019 break;
4020 case 0x5: /* download MC, save and ACT */
4021 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm);
4022 break;
4023 case 0x6: /* download MC with offsets and ACT */
4024 /* set UAs on most devices (LUs) in this target */
4025 list_for_each_entry(dp,
4026 &devip->sdbg_host->dev_info_list,
4027 dev_list)
4028 if (dp->target == sdp->id) {
4029 set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm);
4030 if (devip != dp)
4031 set_bit(SDEBUG_UA_MICROCODE_CHANGED,
4032 dp->uas_bm);
4033 }
4034 break;
4035 case 0x7: /* download MC with offsets, save, and ACT */
4036 /* set UA on all devices (LUs) in this target */
4037 list_for_each_entry(dp,
4038 &devip->sdbg_host->dev_info_list,
4039 dev_list)
4040 if (dp->target == sdp->id)
4041 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET,
4042 dp->uas_bm);
4043 break;
4044 default:
4045 /* do nothing for this command for other mode values */
4046 break;
4047 }
4048 return 0;
4049}
4050
4051static int resp_comp_write(struct scsi_cmnd *scp,
4052 struct sdebug_dev_info *devip)
4053{
4054 u8 *cmd = scp->cmnd;
4055 u8 *arr;
4056 struct sdeb_store_info *sip = devip2sip(devip, true);
4057 u64 lba;
4058 u32 dnum;
4059 u32 lb_size = sdebug_sector_size;
4060 u8 num;
4061 int ret;
4062 int retval = 0;
4063
4064 lba = get_unaligned_be64(cmd + 2);
4065 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */
4066 if (0 == num)
4067 return 0; /* degenerate case, not an error */
4068 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
4069 (cmd[1] & 0xe0)) {
4070 mk_sense_invalid_opcode(scp);
4071 return check_condition_result;
4072 }
4073 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
4074 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
4075 (cmd[1] & 0xe0) == 0)
4076 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
4077 "to DIF device\n");
4078 ret = check_device_access_params(scp, lba, num, false);
4079 if (ret)
4080 return ret;
4081 dnum = 2 * num;
4082 arr = kcalloc(lb_size, dnum, GFP_ATOMIC);
4083 if (NULL == arr) {
4084 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
4085 INSUFF_RES_ASCQ);
4086 return check_condition_result;
4087 }
4088
4089 sdeb_write_lock(sip);
4090
4091 ret = do_dout_fetch(scp, dnum, arr);
4092 if (ret == -1) {
4093 retval = DID_ERROR << 16;
4094 goto cleanup;
4095 } else if (sdebug_verbose && (ret < (dnum * lb_size)))
4096 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb "
4097 "indicated=%u, IO sent=%d bytes\n", my_name,
4098 dnum * lb_size, ret);
4099 if (!comp_write_worker(sip, lba, num, arr, false)) {
4100 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
4101 retval = check_condition_result;
4102 goto cleanup;
4103 }
4104 if (scsi_debug_lbp())
4105 map_region(sip, lba, num);
4106cleanup:
4107 sdeb_write_unlock(sip);
4108 kfree(arr);
4109 return retval;
4110}
4111
4112struct unmap_block_desc {
4113 __be64 lba;
4114 __be32 blocks;
4115 __be32 __reserved;
4116};
4117
4118static int resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4119{
4120 unsigned char *buf;
4121 struct unmap_block_desc *desc;
4122 struct sdeb_store_info *sip = devip2sip(devip, true);
4123 unsigned int i, payload_len, descriptors;
4124 int ret;
4125
4126 if (!scsi_debug_lbp())
4127 return 0; /* fib and say its done */
4128 payload_len = get_unaligned_be16(scp->cmnd + 7);
4129 BUG_ON(scsi_bufflen(scp) != payload_len);
4130
4131 descriptors = (payload_len - 8) / 16;
4132 if (descriptors > sdebug_unmap_max_desc) {
4133 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
4134 return check_condition_result;
4135 }
4136
4137 buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC);
4138 if (!buf) {
4139 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
4140 INSUFF_RES_ASCQ);
4141 return check_condition_result;
4142 }
4143
4144 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
4145
4146 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
4147 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
4148
4149 desc = (void *)&buf[8];
4150
4151 sdeb_write_lock(sip);
4152
4153 for (i = 0 ; i < descriptors ; i++) {
4154 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
4155 unsigned int num = get_unaligned_be32(&desc[i].blocks);
4156
4157 ret = check_device_access_params(scp, lba, num, true);
4158 if (ret)
4159 goto out;
4160
4161 unmap_region(sip, lba, num);
4162 }
4163
4164 ret = 0;
4165
4166out:
4167 sdeb_write_unlock(sip);
4168 kfree(buf);
4169
4170 return ret;
4171}
4172
4173#define SDEBUG_GET_LBA_STATUS_LEN 32
4174
4175static int resp_get_lba_status(struct scsi_cmnd *scp,
4176 struct sdebug_dev_info *devip)
4177{
4178 u8 *cmd = scp->cmnd;
4179 u64 lba;
4180 u32 alloc_len, mapped, num;
4181 int ret;
4182 u8 arr[SDEBUG_GET_LBA_STATUS_LEN];
4183
4184 lba = get_unaligned_be64(cmd + 2);
4185 alloc_len = get_unaligned_be32(cmd + 10);
4186
4187 if (alloc_len < 24)
4188 return 0;
4189
4190 ret = check_device_access_params(scp, lba, 1, false);
4191 if (ret)
4192 return ret;
4193
4194 if (scsi_debug_lbp()) {
4195 struct sdeb_store_info *sip = devip2sip(devip, true);
4196
4197 mapped = map_state(sip, lba, &num);
4198 } else {
4199 mapped = 1;
4200 /* following just in case virtual_gb changed */
4201 sdebug_capacity = get_sdebug_capacity();
4202 if (sdebug_capacity - lba <= 0xffffffff)
4203 num = sdebug_capacity - lba;
4204 else
4205 num = 0xffffffff;
4206 }
4207
4208 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
4209 put_unaligned_be32(20, arr); /* Parameter Data Length */
4210 put_unaligned_be64(lba, arr + 8); /* LBA */
4211 put_unaligned_be32(num, arr + 16); /* Number of blocks */
4212 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */
4213
4214 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN);
4215}
4216
4217static int resp_sync_cache(struct scsi_cmnd *scp,
4218 struct sdebug_dev_info *devip)
4219{
4220 int res = 0;
4221 u64 lba;
4222 u32 num_blocks;
4223 u8 *cmd = scp->cmnd;
4224
4225 if (cmd[0] == SYNCHRONIZE_CACHE) { /* 10 byte cdb */
4226 lba = get_unaligned_be32(cmd + 2);
4227 num_blocks = get_unaligned_be16(cmd + 7);
4228 } else { /* SYNCHRONIZE_CACHE(16) */
4229 lba = get_unaligned_be64(cmd + 2);
4230 num_blocks = get_unaligned_be32(cmd + 10);
4231 }
4232 if (lba + num_blocks > sdebug_capacity) {
4233 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4234 return check_condition_result;
4235 }
4236 if (!write_since_sync || (cmd[1] & 0x2))
4237 res = SDEG_RES_IMMED_MASK;
4238 else /* delay if write_since_sync and IMMED clear */
4239 write_since_sync = false;
4240 return res;
4241}
4242
4243/*
4244 * Assuming the LBA+num_blocks is not out-of-range, this function will return
4245 * CONDITION MET if the specified blocks will/have fitted in the cache, and
4246 * a GOOD status otherwise. Model a disk with a big cache and yield
4247 * CONDITION MET. Actually tries to bring range in main memory into the
4248 * cache associated with the CPU(s).
4249 */
4250static int resp_pre_fetch(struct scsi_cmnd *scp,
4251 struct sdebug_dev_info *devip)
4252{
4253 int res = 0;
4254 u64 lba;
4255 u64 block, rest = 0;
4256 u32 nblks;
4257 u8 *cmd = scp->cmnd;
4258 struct sdeb_store_info *sip = devip2sip(devip, true);
4259 u8 *fsp = sip->storep;
4260
4261 if (cmd[0] == PRE_FETCH) { /* 10 byte cdb */
4262 lba = get_unaligned_be32(cmd + 2);
4263 nblks = get_unaligned_be16(cmd + 7);
4264 } else { /* PRE-FETCH(16) */
4265 lba = get_unaligned_be64(cmd + 2);
4266 nblks = get_unaligned_be32(cmd + 10);
4267 }
4268 if (lba + nblks > sdebug_capacity) {
4269 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4270 return check_condition_result;
4271 }
4272 if (!fsp)
4273 goto fini;
4274 /* PRE-FETCH spec says nothing about LBP or PI so skip them */
4275 block = do_div(lba, sdebug_store_sectors);
4276 if (block + nblks > sdebug_store_sectors)
4277 rest = block + nblks - sdebug_store_sectors;
4278
4279 /* Try to bring the PRE-FETCH range into CPU's cache */
4280 sdeb_read_lock(sip);
4281 prefetch_range(fsp + (sdebug_sector_size * block),
4282 (nblks - rest) * sdebug_sector_size);
4283 if (rest)
4284 prefetch_range(fsp, rest * sdebug_sector_size);
4285 sdeb_read_unlock(sip);
4286fini:
4287 if (cmd[1] & 0x2)
4288 res = SDEG_RES_IMMED_MASK;
4289 return res | condition_met_result;
4290}
4291
4292#define RL_BUCKET_ELEMS 8
4293
4294/* Even though each pseudo target has a REPORT LUNS "well known logical unit"
4295 * (W-LUN), the normal Linux scanning logic does not associate it with a
4296 * device (e.g. /dev/sg7). The following magic will make that association:
4297 * "cd /sys/class/scsi_host/host<n> ; echo '- - 49409' > scan"
4298 * where <n> is a host number. If there are multiple targets in a host then
4299 * the above will associate a W-LUN to each target. To only get a W-LUN
4300 * for target 2, then use "echo '- 2 49409' > scan" .
4301 */
4302static int resp_report_luns(struct scsi_cmnd *scp,
4303 struct sdebug_dev_info *devip)
4304{
4305 unsigned char *cmd = scp->cmnd;
4306 unsigned int alloc_len;
4307 unsigned char select_report;
4308 u64 lun;
4309 struct scsi_lun *lun_p;
4310 u8 arr[RL_BUCKET_ELEMS * sizeof(struct scsi_lun)];
4311 unsigned int lun_cnt; /* normal LUN count (max: 256) */
4312 unsigned int wlun_cnt; /* report luns W-LUN count */
4313 unsigned int tlun_cnt; /* total LUN count */
4314 unsigned int rlen; /* response length (in bytes) */
4315 int k, j, n, res;
4316 unsigned int off_rsp = 0;
4317 const int sz_lun = sizeof(struct scsi_lun);
4318
4319 clear_luns_changed_on_target(devip);
4320
4321 select_report = cmd[2];
4322 alloc_len = get_unaligned_be32(cmd + 6);
4323
4324 if (alloc_len < 4) {
4325 pr_err("alloc len too small %d\n", alloc_len);
4326 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
4327 return check_condition_result;
4328 }
4329
4330 switch (select_report) {
4331 case 0: /* all LUNs apart from W-LUNs */
4332 lun_cnt = sdebug_max_luns;
4333 wlun_cnt = 0;
4334 break;
4335 case 1: /* only W-LUNs */
4336 lun_cnt = 0;
4337 wlun_cnt = 1;
4338 break;
4339 case 2: /* all LUNs */
4340 lun_cnt = sdebug_max_luns;
4341 wlun_cnt = 1;
4342 break;
4343 case 0x10: /* only administrative LUs */
4344 case 0x11: /* see SPC-5 */
4345 case 0x12: /* only subsiduary LUs owned by referenced LU */
4346 default:
4347 pr_debug("select report invalid %d\n", select_report);
4348 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
4349 return check_condition_result;
4350 }
4351
4352 if (sdebug_no_lun_0 && (lun_cnt > 0))
4353 --lun_cnt;
4354
4355 tlun_cnt = lun_cnt + wlun_cnt;
4356 rlen = tlun_cnt * sz_lun; /* excluding 8 byte header */
4357 scsi_set_resid(scp, scsi_bufflen(scp));
4358 pr_debug("select_report %d luns = %d wluns = %d no_lun0 %d\n",
4359 select_report, lun_cnt, wlun_cnt, sdebug_no_lun_0);
4360
4361 /* loops rely on sizeof response header same as sizeof lun (both 8) */
4362 lun = sdebug_no_lun_0 ? 1 : 0;
4363 for (k = 0, j = 0, res = 0; true; ++k, j = 0) {
4364 memset(arr, 0, sizeof(arr));
4365 lun_p = (struct scsi_lun *)&arr[0];
4366 if (k == 0) {
4367 put_unaligned_be32(rlen, &arr[0]);
4368 ++lun_p;
4369 j = 1;
4370 }
4371 for ( ; j < RL_BUCKET_ELEMS; ++j, ++lun_p) {
4372 if ((k * RL_BUCKET_ELEMS) + j > lun_cnt)
4373 break;
4374 int_to_scsilun(lun++, lun_p);
4375 if (lun > 1 && sdebug_lun_am == SAM_LUN_AM_FLAT)
4376 lun_p->scsi_lun[0] |= 0x40;
4377 }
4378 if (j < RL_BUCKET_ELEMS)
4379 break;
4380 n = j * sz_lun;
4381 res = p_fill_from_dev_buffer(scp, arr, n, off_rsp);
4382 if (res)
4383 return res;
4384 off_rsp += n;
4385 }
4386 if (wlun_cnt) {
4387 int_to_scsilun(SCSI_W_LUN_REPORT_LUNS, lun_p);
4388 ++j;
4389 }
4390 if (j > 0)
4391 res = p_fill_from_dev_buffer(scp, arr, j * sz_lun, off_rsp);
4392 return res;
4393}
4394
4395static int resp_verify(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4396{
4397 bool is_bytchk3 = false;
4398 u8 bytchk;
4399 int ret, j;
4400 u32 vnum, a_num, off;
4401 const u32 lb_size = sdebug_sector_size;
4402 u64 lba;
4403 u8 *arr;
4404 u8 *cmd = scp->cmnd;
4405 struct sdeb_store_info *sip = devip2sip(devip, true);
4406
4407 bytchk = (cmd[1] >> 1) & 0x3;
4408 if (bytchk == 0) {
4409 return 0; /* always claim internal verify okay */
4410 } else if (bytchk == 2) {
4411 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
4412 return check_condition_result;
4413 } else if (bytchk == 3) {
4414 is_bytchk3 = true; /* 1 block sent, compared repeatedly */
4415 }
4416 switch (cmd[0]) {
4417 case VERIFY_16:
4418 lba = get_unaligned_be64(cmd + 2);
4419 vnum = get_unaligned_be32(cmd + 10);
4420 break;
4421 case VERIFY: /* is VERIFY(10) */
4422 lba = get_unaligned_be32(cmd + 2);
4423 vnum = get_unaligned_be16(cmd + 7);
4424 break;
4425 default:
4426 mk_sense_invalid_opcode(scp);
4427 return check_condition_result;
4428 }
4429 if (vnum == 0)
4430 return 0; /* not an error */
4431 a_num = is_bytchk3 ? 1 : vnum;
4432 /* Treat following check like one for read (i.e. no write) access */
4433 ret = check_device_access_params(scp, lba, a_num, false);
4434 if (ret)
4435 return ret;
4436
4437 arr = kcalloc(lb_size, vnum, GFP_ATOMIC | __GFP_NOWARN);
4438 if (!arr) {
4439 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
4440 INSUFF_RES_ASCQ);
4441 return check_condition_result;
4442 }
4443 /* Not changing store, so only need read access */
4444 sdeb_read_lock(sip);
4445
4446 ret = do_dout_fetch(scp, a_num, arr);
4447 if (ret == -1) {
4448 ret = DID_ERROR << 16;
4449 goto cleanup;
4450 } else if (sdebug_verbose && (ret < (a_num * lb_size))) {
4451 sdev_printk(KERN_INFO, scp->device,
4452 "%s: %s: cdb indicated=%u, IO sent=%d bytes\n",
4453 my_name, __func__, a_num * lb_size, ret);
4454 }
4455 if (is_bytchk3) {
4456 for (j = 1, off = lb_size; j < vnum; ++j, off += lb_size)
4457 memcpy(arr + off, arr, lb_size);
4458 }
4459 ret = 0;
4460 if (!comp_write_worker(sip, lba, vnum, arr, true)) {
4461 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
4462 ret = check_condition_result;
4463 goto cleanup;
4464 }
4465cleanup:
4466 sdeb_read_unlock(sip);
4467 kfree(arr);
4468 return ret;
4469}
4470
4471#define RZONES_DESC_HD 64
4472
4473/* Report zones depending on start LBA and reporting options */
4474static int resp_report_zones(struct scsi_cmnd *scp,
4475 struct sdebug_dev_info *devip)
4476{
4477 unsigned int rep_max_zones, nrz = 0;
4478 int ret = 0;
4479 u32 alloc_len, rep_opts, rep_len;
4480 bool partial;
4481 u64 lba, zs_lba;
4482 u8 *arr = NULL, *desc;
4483 u8 *cmd = scp->cmnd;
4484 struct sdeb_zone_state *zsp = NULL;
4485 struct sdeb_store_info *sip = devip2sip(devip, false);
4486
4487 if (!sdebug_dev_is_zoned(devip)) {
4488 mk_sense_invalid_opcode(scp);
4489 return check_condition_result;
4490 }
4491 zs_lba = get_unaligned_be64(cmd + 2);
4492 alloc_len = get_unaligned_be32(cmd + 10);
4493 if (alloc_len == 0)
4494 return 0; /* not an error */
4495 rep_opts = cmd[14] & 0x3f;
4496 partial = cmd[14] & 0x80;
4497
4498 if (zs_lba >= sdebug_capacity) {
4499 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4500 return check_condition_result;
4501 }
4502
4503 rep_max_zones = (alloc_len - 64) >> ilog2(RZONES_DESC_HD);
4504
4505 arr = kzalloc(alloc_len, GFP_ATOMIC | __GFP_NOWARN);
4506 if (!arr) {
4507 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
4508 INSUFF_RES_ASCQ);
4509 return check_condition_result;
4510 }
4511
4512 sdeb_read_lock(sip);
4513
4514 desc = arr + 64;
4515 for (lba = zs_lba; lba < sdebug_capacity;
4516 lba = zsp->z_start + zsp->z_size) {
4517 if (WARN_ONCE(zbc_zone(devip, lba) == zsp, "lba = %llu\n", lba))
4518 break;
4519 zsp = zbc_zone(devip, lba);
4520 switch (rep_opts) {
4521 case 0x00:
4522 /* All zones */
4523 break;
4524 case 0x01:
4525 /* Empty zones */
4526 if (zsp->z_cond != ZC1_EMPTY)
4527 continue;
4528 break;
4529 case 0x02:
4530 /* Implicit open zones */
4531 if (zsp->z_cond != ZC2_IMPLICIT_OPEN)
4532 continue;
4533 break;
4534 case 0x03:
4535 /* Explicit open zones */
4536 if (zsp->z_cond != ZC3_EXPLICIT_OPEN)
4537 continue;
4538 break;
4539 case 0x04:
4540 /* Closed zones */
4541 if (zsp->z_cond != ZC4_CLOSED)
4542 continue;
4543 break;
4544 case 0x05:
4545 /* Full zones */
4546 if (zsp->z_cond != ZC5_FULL)
4547 continue;
4548 break;
4549 case 0x06:
4550 case 0x07:
4551 case 0x10:
4552 /*
4553 * Read-only, offline, reset WP recommended are
4554 * not emulated: no zones to report;
4555 */
4556 continue;
4557 case 0x11:
4558 /* non-seq-resource set */
4559 if (!zsp->z_non_seq_resource)
4560 continue;
4561 break;
4562 case 0x3e:
4563 /* All zones except gap zones. */
4564 if (zbc_zone_is_gap(zsp))
4565 continue;
4566 break;
4567 case 0x3f:
4568 /* Not write pointer (conventional) zones */
4569 if (zbc_zone_is_seq(zsp))
4570 continue;
4571 break;
4572 default:
4573 mk_sense_buffer(scp, ILLEGAL_REQUEST,
4574 INVALID_FIELD_IN_CDB, 0);
4575 ret = check_condition_result;
4576 goto fini;
4577 }
4578
4579 if (nrz < rep_max_zones) {
4580 /* Fill zone descriptor */
4581 desc[0] = zsp->z_type;
4582 desc[1] = zsp->z_cond << 4;
4583 if (zsp->z_non_seq_resource)
4584 desc[1] |= 1 << 1;
4585 put_unaligned_be64((u64)zsp->z_size, desc + 8);
4586 put_unaligned_be64((u64)zsp->z_start, desc + 16);
4587 put_unaligned_be64((u64)zsp->z_wp, desc + 24);
4588 desc += 64;
4589 }
4590
4591 if (partial && nrz >= rep_max_zones)
4592 break;
4593
4594 nrz++;
4595 }
4596
4597 /* Report header */
4598 /* Zone list length. */
4599 put_unaligned_be32(nrz * RZONES_DESC_HD, arr + 0);
4600 /* Maximum LBA */
4601 put_unaligned_be64(sdebug_capacity - 1, arr + 8);
4602 /* Zone starting LBA granularity. */
4603 if (devip->zcap < devip->zsize)
4604 put_unaligned_be64(devip->zsize, arr + 16);
4605
4606 rep_len = (unsigned long)desc - (unsigned long)arr;
4607 ret = fill_from_dev_buffer(scp, arr, min_t(u32, alloc_len, rep_len));
4608
4609fini:
4610 sdeb_read_unlock(sip);
4611 kfree(arr);
4612 return ret;
4613}
4614
4615/* Logic transplanted from tcmu-runner, file_zbc.c */
4616static void zbc_open_all(struct sdebug_dev_info *devip)
4617{
4618 struct sdeb_zone_state *zsp = &devip->zstate[0];
4619 unsigned int i;
4620
4621 for (i = 0; i < devip->nr_zones; i++, zsp++) {
4622 if (zsp->z_cond == ZC4_CLOSED)
4623 zbc_open_zone(devip, &devip->zstate[i], true);
4624 }
4625}
4626
4627static int resp_open_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4628{
4629 int res = 0;
4630 u64 z_id;
4631 enum sdebug_z_cond zc;
4632 u8 *cmd = scp->cmnd;
4633 struct sdeb_zone_state *zsp;
4634 bool all = cmd[14] & 0x01;
4635 struct sdeb_store_info *sip = devip2sip(devip, false);
4636
4637 if (!sdebug_dev_is_zoned(devip)) {
4638 mk_sense_invalid_opcode(scp);
4639 return check_condition_result;
4640 }
4641
4642 sdeb_write_lock(sip);
4643
4644 if (all) {
4645 /* Check if all closed zones can be open */
4646 if (devip->max_open &&
4647 devip->nr_exp_open + devip->nr_closed > devip->max_open) {
4648 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC,
4649 INSUFF_ZONE_ASCQ);
4650 res = check_condition_result;
4651 goto fini;
4652 }
4653 /* Open all closed zones */
4654 zbc_open_all(devip);
4655 goto fini;
4656 }
4657
4658 /* Open the specified zone */
4659 z_id = get_unaligned_be64(cmd + 2);
4660 if (z_id >= sdebug_capacity) {
4661 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4662 res = check_condition_result;
4663 goto fini;
4664 }
4665
4666 zsp = zbc_zone(devip, z_id);
4667 if (z_id != zsp->z_start) {
4668 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4669 res = check_condition_result;
4670 goto fini;
4671 }
4672 if (zbc_zone_is_conv(zsp)) {
4673 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4674 res = check_condition_result;
4675 goto fini;
4676 }
4677
4678 zc = zsp->z_cond;
4679 if (zc == ZC3_EXPLICIT_OPEN || zc == ZC5_FULL)
4680 goto fini;
4681
4682 if (devip->max_open && devip->nr_exp_open >= devip->max_open) {
4683 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC,
4684 INSUFF_ZONE_ASCQ);
4685 res = check_condition_result;
4686 goto fini;
4687 }
4688
4689 zbc_open_zone(devip, zsp, true);
4690fini:
4691 sdeb_write_unlock(sip);
4692 return res;
4693}
4694
4695static void zbc_close_all(struct sdebug_dev_info *devip)
4696{
4697 unsigned int i;
4698
4699 for (i = 0; i < devip->nr_zones; i++)
4700 zbc_close_zone(devip, &devip->zstate[i]);
4701}
4702
4703static int resp_close_zone(struct scsi_cmnd *scp,
4704 struct sdebug_dev_info *devip)
4705{
4706 int res = 0;
4707 u64 z_id;
4708 u8 *cmd = scp->cmnd;
4709 struct sdeb_zone_state *zsp;
4710 bool all = cmd[14] & 0x01;
4711 struct sdeb_store_info *sip = devip2sip(devip, false);
4712
4713 if (!sdebug_dev_is_zoned(devip)) {
4714 mk_sense_invalid_opcode(scp);
4715 return check_condition_result;
4716 }
4717
4718 sdeb_write_lock(sip);
4719
4720 if (all) {
4721 zbc_close_all(devip);
4722 goto fini;
4723 }
4724
4725 /* Close specified zone */
4726 z_id = get_unaligned_be64(cmd + 2);
4727 if (z_id >= sdebug_capacity) {
4728 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4729 res = check_condition_result;
4730 goto fini;
4731 }
4732
4733 zsp = zbc_zone(devip, z_id);
4734 if (z_id != zsp->z_start) {
4735 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4736 res = check_condition_result;
4737 goto fini;
4738 }
4739 if (zbc_zone_is_conv(zsp)) {
4740 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4741 res = check_condition_result;
4742 goto fini;
4743 }
4744
4745 zbc_close_zone(devip, zsp);
4746fini:
4747 sdeb_write_unlock(sip);
4748 return res;
4749}
4750
4751static void zbc_finish_zone(struct sdebug_dev_info *devip,
4752 struct sdeb_zone_state *zsp, bool empty)
4753{
4754 enum sdebug_z_cond zc = zsp->z_cond;
4755
4756 if (zc == ZC4_CLOSED || zc == ZC2_IMPLICIT_OPEN ||
4757 zc == ZC3_EXPLICIT_OPEN || (empty && zc == ZC1_EMPTY)) {
4758 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)
4759 zbc_close_zone(devip, zsp);
4760 if (zsp->z_cond == ZC4_CLOSED)
4761 devip->nr_closed--;
4762 zsp->z_wp = zsp->z_start + zsp->z_size;
4763 zsp->z_cond = ZC5_FULL;
4764 }
4765}
4766
4767static void zbc_finish_all(struct sdebug_dev_info *devip)
4768{
4769 unsigned int i;
4770
4771 for (i = 0; i < devip->nr_zones; i++)
4772 zbc_finish_zone(devip, &devip->zstate[i], false);
4773}
4774
4775static int resp_finish_zone(struct scsi_cmnd *scp,
4776 struct sdebug_dev_info *devip)
4777{
4778 struct sdeb_zone_state *zsp;
4779 int res = 0;
4780 u64 z_id;
4781 u8 *cmd = scp->cmnd;
4782 bool all = cmd[14] & 0x01;
4783 struct sdeb_store_info *sip = devip2sip(devip, false);
4784
4785 if (!sdebug_dev_is_zoned(devip)) {
4786 mk_sense_invalid_opcode(scp);
4787 return check_condition_result;
4788 }
4789
4790 sdeb_write_lock(sip);
4791
4792 if (all) {
4793 zbc_finish_all(devip);
4794 goto fini;
4795 }
4796
4797 /* Finish the specified zone */
4798 z_id = get_unaligned_be64(cmd + 2);
4799 if (z_id >= sdebug_capacity) {
4800 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4801 res = check_condition_result;
4802 goto fini;
4803 }
4804
4805 zsp = zbc_zone(devip, z_id);
4806 if (z_id != zsp->z_start) {
4807 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4808 res = check_condition_result;
4809 goto fini;
4810 }
4811 if (zbc_zone_is_conv(zsp)) {
4812 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4813 res = check_condition_result;
4814 goto fini;
4815 }
4816
4817 zbc_finish_zone(devip, zsp, true);
4818fini:
4819 sdeb_write_unlock(sip);
4820 return res;
4821}
4822
4823static void zbc_rwp_zone(struct sdebug_dev_info *devip,
4824 struct sdeb_zone_state *zsp)
4825{
4826 enum sdebug_z_cond zc;
4827 struct sdeb_store_info *sip = devip2sip(devip, false);
4828
4829 if (!zbc_zone_is_seq(zsp))
4830 return;
4831
4832 zc = zsp->z_cond;
4833 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)
4834 zbc_close_zone(devip, zsp);
4835
4836 if (zsp->z_cond == ZC4_CLOSED)
4837 devip->nr_closed--;
4838
4839 if (zsp->z_wp > zsp->z_start)
4840 memset(sip->storep + zsp->z_start * sdebug_sector_size, 0,
4841 (zsp->z_wp - zsp->z_start) * sdebug_sector_size);
4842
4843 zsp->z_non_seq_resource = false;
4844 zsp->z_wp = zsp->z_start;
4845 zsp->z_cond = ZC1_EMPTY;
4846}
4847
4848static void zbc_rwp_all(struct sdebug_dev_info *devip)
4849{
4850 unsigned int i;
4851
4852 for (i = 0; i < devip->nr_zones; i++)
4853 zbc_rwp_zone(devip, &devip->zstate[i]);
4854}
4855
4856static int resp_rwp_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4857{
4858 struct sdeb_zone_state *zsp;
4859 int res = 0;
4860 u64 z_id;
4861 u8 *cmd = scp->cmnd;
4862 bool all = cmd[14] & 0x01;
4863 struct sdeb_store_info *sip = devip2sip(devip, false);
4864
4865 if (!sdebug_dev_is_zoned(devip)) {
4866 mk_sense_invalid_opcode(scp);
4867 return check_condition_result;
4868 }
4869
4870 sdeb_write_lock(sip);
4871
4872 if (all) {
4873 zbc_rwp_all(devip);
4874 goto fini;
4875 }
4876
4877 z_id = get_unaligned_be64(cmd + 2);
4878 if (z_id >= sdebug_capacity) {
4879 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4880 res = check_condition_result;
4881 goto fini;
4882 }
4883
4884 zsp = zbc_zone(devip, z_id);
4885 if (z_id != zsp->z_start) {
4886 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4887 res = check_condition_result;
4888 goto fini;
4889 }
4890 if (zbc_zone_is_conv(zsp)) {
4891 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4892 res = check_condition_result;
4893 goto fini;
4894 }
4895
4896 zbc_rwp_zone(devip, zsp);
4897fini:
4898 sdeb_write_unlock(sip);
4899 return res;
4900}
4901
4902static struct sdebug_queue *get_queue(struct scsi_cmnd *cmnd)
4903{
4904 u16 hwq;
4905 u32 tag = blk_mq_unique_tag(scsi_cmd_to_rq(cmnd));
4906
4907 hwq = blk_mq_unique_tag_to_hwq(tag);
4908
4909 pr_debug("tag=%#x, hwq=%d\n", tag, hwq);
4910 if (WARN_ON_ONCE(hwq >= submit_queues))
4911 hwq = 0;
4912
4913 return sdebug_q_arr + hwq;
4914}
4915
4916static u32 get_tag(struct scsi_cmnd *cmnd)
4917{
4918 return blk_mq_unique_tag(scsi_cmd_to_rq(cmnd));
4919}
4920
4921/* Queued (deferred) command completions converge here. */
4922static void sdebug_q_cmd_complete(struct sdebug_defer *sd_dp)
4923{
4924 bool aborted = sd_dp->aborted;
4925 int qc_idx;
4926 int retiring = 0;
4927 unsigned long iflags;
4928 struct sdebug_queue *sqp;
4929 struct sdebug_queued_cmd *sqcp;
4930 struct scsi_cmnd *scp;
4931 struct sdebug_dev_info *devip;
4932
4933 if (unlikely(aborted))
4934 sd_dp->aborted = false;
4935 qc_idx = sd_dp->qc_idx;
4936 sqp = sdebug_q_arr + sd_dp->sqa_idx;
4937 if (sdebug_statistics) {
4938 atomic_inc(&sdebug_completions);
4939 if (raw_smp_processor_id() != sd_dp->issuing_cpu)
4940 atomic_inc(&sdebug_miss_cpus);
4941 }
4942 if (unlikely((qc_idx < 0) || (qc_idx >= SDEBUG_CANQUEUE))) {
4943 pr_err("wild qc_idx=%d\n", qc_idx);
4944 return;
4945 }
4946 spin_lock_irqsave(&sqp->qc_lock, iflags);
4947 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_NONE);
4948 sqcp = &sqp->qc_arr[qc_idx];
4949 scp = sqcp->a_cmnd;
4950 if (unlikely(scp == NULL)) {
4951 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4952 pr_err("scp is NULL, sqa_idx=%d, qc_idx=%d, hc_idx=%d\n",
4953 sd_dp->sqa_idx, qc_idx, sd_dp->hc_idx);
4954 return;
4955 }
4956 devip = (struct sdebug_dev_info *)scp->device->hostdata;
4957 if (likely(devip))
4958 atomic_dec(&devip->num_in_q);
4959 else
4960 pr_err("devip=NULL\n");
4961 if (unlikely(atomic_read(&retired_max_queue) > 0))
4962 retiring = 1;
4963
4964 sqcp->a_cmnd = NULL;
4965 if (unlikely(!test_and_clear_bit(qc_idx, sqp->in_use_bm))) {
4966 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4967 pr_err("Unexpected completion\n");
4968 return;
4969 }
4970
4971 if (unlikely(retiring)) { /* user has reduced max_queue */
4972 int k, retval;
4973
4974 retval = atomic_read(&retired_max_queue);
4975 if (qc_idx >= retval) {
4976 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4977 pr_err("index %d too large\n", retval);
4978 return;
4979 }
4980 k = find_last_bit(sqp->in_use_bm, retval);
4981 if ((k < sdebug_max_queue) || (k == retval))
4982 atomic_set(&retired_max_queue, 0);
4983 else
4984 atomic_set(&retired_max_queue, k + 1);
4985 }
4986 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4987 if (unlikely(aborted)) {
4988 if (sdebug_verbose)
4989 pr_info("bypassing scsi_done() due to aborted cmd\n");
4990 return;
4991 }
4992 scsi_done(scp); /* callback to mid level */
4993}
4994
4995/* When high resolution timer goes off this function is called. */
4996static enum hrtimer_restart sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
4997{
4998 struct sdebug_defer *sd_dp = container_of(timer, struct sdebug_defer,
4999 hrt);
5000 sdebug_q_cmd_complete(sd_dp);
5001 return HRTIMER_NORESTART;
5002}
5003
5004/* When work queue schedules work, it calls this function. */
5005static void sdebug_q_cmd_wq_complete(struct work_struct *work)
5006{
5007 struct sdebug_defer *sd_dp = container_of(work, struct sdebug_defer,
5008 ew.work);
5009 sdebug_q_cmd_complete(sd_dp);
5010}
5011
5012static bool got_shared_uuid;
5013static uuid_t shared_uuid;
5014
5015static int sdebug_device_create_zones(struct sdebug_dev_info *devip)
5016{
5017 struct sdeb_zone_state *zsp;
5018 sector_t capacity = get_sdebug_capacity();
5019 sector_t conv_capacity;
5020 sector_t zstart = 0;
5021 unsigned int i;
5022
5023 /*
5024 * Set the zone size: if sdeb_zbc_zone_size_mb is not set, figure out
5025 * a zone size allowing for at least 4 zones on the device. Otherwise,
5026 * use the specified zone size checking that at least 2 zones can be
5027 * created for the device.
5028 */
5029 if (!sdeb_zbc_zone_size_mb) {
5030 devip->zsize = (DEF_ZBC_ZONE_SIZE_MB * SZ_1M)
5031 >> ilog2(sdebug_sector_size);
5032 while (capacity < devip->zsize << 2 && devip->zsize >= 2)
5033 devip->zsize >>= 1;
5034 if (devip->zsize < 2) {
5035 pr_err("Device capacity too small\n");
5036 return -EINVAL;
5037 }
5038 } else {
5039 if (!is_power_of_2(sdeb_zbc_zone_size_mb)) {
5040 pr_err("Zone size is not a power of 2\n");
5041 return -EINVAL;
5042 }
5043 devip->zsize = (sdeb_zbc_zone_size_mb * SZ_1M)
5044 >> ilog2(sdebug_sector_size);
5045 if (devip->zsize >= capacity) {
5046 pr_err("Zone size too large for device capacity\n");
5047 return -EINVAL;
5048 }
5049 }
5050
5051 devip->zsize_shift = ilog2(devip->zsize);
5052 devip->nr_zones = (capacity + devip->zsize - 1) >> devip->zsize_shift;
5053
5054 if (sdeb_zbc_zone_cap_mb == 0) {
5055 devip->zcap = devip->zsize;
5056 } else {
5057 devip->zcap = (sdeb_zbc_zone_cap_mb * SZ_1M) >>
5058 ilog2(sdebug_sector_size);
5059 if (devip->zcap > devip->zsize) {
5060 pr_err("Zone capacity too large\n");
5061 return -EINVAL;
5062 }
5063 }
5064
5065 conv_capacity = (sector_t)sdeb_zbc_nr_conv << devip->zsize_shift;
5066 if (conv_capacity >= capacity) {
5067 pr_err("Number of conventional zones too large\n");
5068 return -EINVAL;
5069 }
5070 devip->nr_conv_zones = sdeb_zbc_nr_conv;
5071 devip->nr_seq_zones = ALIGN(capacity - conv_capacity, devip->zsize) >>
5072 devip->zsize_shift;
5073 devip->nr_zones = devip->nr_conv_zones + devip->nr_seq_zones;
5074
5075 /* Add gap zones if zone capacity is smaller than the zone size */
5076 if (devip->zcap < devip->zsize)
5077 devip->nr_zones += devip->nr_seq_zones;
5078
5079 if (devip->zmodel == BLK_ZONED_HM) {
5080 /* zbc_max_open_zones can be 0, meaning "not reported" */
5081 if (sdeb_zbc_max_open >= devip->nr_zones - 1)
5082 devip->max_open = (devip->nr_zones - 1) / 2;
5083 else
5084 devip->max_open = sdeb_zbc_max_open;
5085 }
5086
5087 devip->zstate = kcalloc(devip->nr_zones,
5088 sizeof(struct sdeb_zone_state), GFP_KERNEL);
5089 if (!devip->zstate)
5090 return -ENOMEM;
5091
5092 for (i = 0; i < devip->nr_zones; i++) {
5093 zsp = &devip->zstate[i];
5094
5095 zsp->z_start = zstart;
5096
5097 if (i < devip->nr_conv_zones) {
5098 zsp->z_type = ZBC_ZTYPE_CNV;
5099 zsp->z_cond = ZBC_NOT_WRITE_POINTER;
5100 zsp->z_wp = (sector_t)-1;
5101 zsp->z_size =
5102 min_t(u64, devip->zsize, capacity - zstart);
5103 } else if ((zstart & (devip->zsize - 1)) == 0) {
5104 if (devip->zmodel == BLK_ZONED_HM)
5105 zsp->z_type = ZBC_ZTYPE_SWR;
5106 else
5107 zsp->z_type = ZBC_ZTYPE_SWP;
5108 zsp->z_cond = ZC1_EMPTY;
5109 zsp->z_wp = zsp->z_start;
5110 zsp->z_size =
5111 min_t(u64, devip->zcap, capacity - zstart);
5112 } else {
5113 zsp->z_type = ZBC_ZTYPE_GAP;
5114 zsp->z_cond = ZBC_NOT_WRITE_POINTER;
5115 zsp->z_wp = (sector_t)-1;
5116 zsp->z_size = min_t(u64, devip->zsize - devip->zcap,
5117 capacity - zstart);
5118 }
5119
5120 WARN_ON_ONCE((int)zsp->z_size <= 0);
5121 zstart += zsp->z_size;
5122 }
5123
5124 return 0;
5125}
5126
5127static struct sdebug_dev_info *sdebug_device_create(
5128 struct sdebug_host_info *sdbg_host, gfp_t flags)
5129{
5130 struct sdebug_dev_info *devip;
5131
5132 devip = kzalloc(sizeof(*devip), flags);
5133 if (devip) {
5134 if (sdebug_uuid_ctl == 1)
5135 uuid_gen(&devip->lu_name);
5136 else if (sdebug_uuid_ctl == 2) {
5137 if (got_shared_uuid)
5138 devip->lu_name = shared_uuid;
5139 else {
5140 uuid_gen(&shared_uuid);
5141 got_shared_uuid = true;
5142 devip->lu_name = shared_uuid;
5143 }
5144 }
5145 devip->sdbg_host = sdbg_host;
5146 if (sdeb_zbc_in_use) {
5147 devip->zmodel = sdeb_zbc_model;
5148 if (sdebug_device_create_zones(devip)) {
5149 kfree(devip);
5150 return NULL;
5151 }
5152 } else {
5153 devip->zmodel = BLK_ZONED_NONE;
5154 }
5155 devip->sdbg_host = sdbg_host;
5156 devip->create_ts = ktime_get_boottime();
5157 atomic_set(&devip->stopped, (sdeb_tur_ms_to_ready > 0 ? 2 : 0));
5158 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
5159 }
5160 return devip;
5161}
5162
5163static struct sdebug_dev_info *find_build_dev_info(struct scsi_device *sdev)
5164{
5165 struct sdebug_host_info *sdbg_host;
5166 struct sdebug_dev_info *open_devip = NULL;
5167 struct sdebug_dev_info *devip;
5168
5169 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
5170 if (!sdbg_host) {
5171 pr_err("Host info NULL\n");
5172 return NULL;
5173 }
5174
5175 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
5176 if ((devip->used) && (devip->channel == sdev->channel) &&
5177 (devip->target == sdev->id) &&
5178 (devip->lun == sdev->lun))
5179 return devip;
5180 else {
5181 if ((!devip->used) && (!open_devip))
5182 open_devip = devip;
5183 }
5184 }
5185 if (!open_devip) { /* try and make a new one */
5186 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
5187 if (!open_devip) {
5188 pr_err("out of memory at line %d\n", __LINE__);
5189 return NULL;
5190 }
5191 }
5192
5193 open_devip->channel = sdev->channel;
5194 open_devip->target = sdev->id;
5195 open_devip->lun = sdev->lun;
5196 open_devip->sdbg_host = sdbg_host;
5197 atomic_set(&open_devip->num_in_q, 0);
5198 set_bit(SDEBUG_UA_POOCCUR, open_devip->uas_bm);
5199 open_devip->used = true;
5200 return open_devip;
5201}
5202
5203static int scsi_debug_slave_alloc(struct scsi_device *sdp)
5204{
5205 if (sdebug_verbose)
5206 pr_info("slave_alloc <%u %u %u %llu>\n",
5207 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
5208 return 0;
5209}
5210
5211static int scsi_debug_slave_configure(struct scsi_device *sdp)
5212{
5213 struct sdebug_dev_info *devip =
5214 (struct sdebug_dev_info *)sdp->hostdata;
5215
5216 if (sdebug_verbose)
5217 pr_info("slave_configure <%u %u %u %llu>\n",
5218 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
5219 if (sdp->host->max_cmd_len != SDEBUG_MAX_CMD_LEN)
5220 sdp->host->max_cmd_len = SDEBUG_MAX_CMD_LEN;
5221 if (devip == NULL) {
5222 devip = find_build_dev_info(sdp);
5223 if (devip == NULL)
5224 return 1; /* no resources, will be marked offline */
5225 }
5226 sdp->hostdata = devip;
5227 if (sdebug_no_uld)
5228 sdp->no_uld_attach = 1;
5229 config_cdb_len(sdp);
5230 return 0;
5231}
5232
5233static void scsi_debug_slave_destroy(struct scsi_device *sdp)
5234{
5235 struct sdebug_dev_info *devip =
5236 (struct sdebug_dev_info *)sdp->hostdata;
5237
5238 if (sdebug_verbose)
5239 pr_info("slave_destroy <%u %u %u %llu>\n",
5240 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
5241 if (devip) {
5242 /* make this slot available for re-use */
5243 devip->used = false;
5244 sdp->hostdata = NULL;
5245 }
5246}
5247
5248static void stop_qc_helper(struct sdebug_defer *sd_dp,
5249 enum sdeb_defer_type defer_t)
5250{
5251 if (!sd_dp)
5252 return;
5253 if (defer_t == SDEB_DEFER_HRT)
5254 hrtimer_cancel(&sd_dp->hrt);
5255 else if (defer_t == SDEB_DEFER_WQ)
5256 cancel_work_sync(&sd_dp->ew.work);
5257}
5258
5259/* If @cmnd found deletes its timer or work queue and returns true; else
5260 returns false */
5261static bool stop_queued_cmnd(struct scsi_cmnd *cmnd)
5262{
5263 unsigned long iflags;
5264 int j, k, qmax, r_qmax;
5265 enum sdeb_defer_type l_defer_t;
5266 struct sdebug_queue *sqp;
5267 struct sdebug_queued_cmd *sqcp;
5268 struct sdebug_dev_info *devip;
5269 struct sdebug_defer *sd_dp;
5270
5271 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
5272 spin_lock_irqsave(&sqp->qc_lock, iflags);
5273 qmax = sdebug_max_queue;
5274 r_qmax = atomic_read(&retired_max_queue);
5275 if (r_qmax > qmax)
5276 qmax = r_qmax;
5277 for (k = 0; k < qmax; ++k) {
5278 if (test_bit(k, sqp->in_use_bm)) {
5279 sqcp = &sqp->qc_arr[k];
5280 if (cmnd != sqcp->a_cmnd)
5281 continue;
5282 /* found */
5283 devip = (struct sdebug_dev_info *)
5284 cmnd->device->hostdata;
5285 if (devip)
5286 atomic_dec(&devip->num_in_q);
5287 sqcp->a_cmnd = NULL;
5288 sd_dp = sqcp->sd_dp;
5289 if (sd_dp) {
5290 l_defer_t = READ_ONCE(sd_dp->defer_t);
5291 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_NONE);
5292 } else
5293 l_defer_t = SDEB_DEFER_NONE;
5294 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5295 stop_qc_helper(sd_dp, l_defer_t);
5296 clear_bit(k, sqp->in_use_bm);
5297 return true;
5298 }
5299 }
5300 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5301 }
5302 return false;
5303}
5304
5305/* Deletes (stops) timers or work queues of all queued commands */
5306static void stop_all_queued(void)
5307{
5308 unsigned long iflags;
5309 int j, k;
5310 enum sdeb_defer_type l_defer_t;
5311 struct sdebug_queue *sqp;
5312 struct sdebug_queued_cmd *sqcp;
5313 struct sdebug_dev_info *devip;
5314 struct sdebug_defer *sd_dp;
5315
5316 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
5317 spin_lock_irqsave(&sqp->qc_lock, iflags);
5318 for (k = 0; k < SDEBUG_CANQUEUE; ++k) {
5319 if (test_bit(k, sqp->in_use_bm)) {
5320 sqcp = &sqp->qc_arr[k];
5321 if (sqcp->a_cmnd == NULL)
5322 continue;
5323 devip = (struct sdebug_dev_info *)
5324 sqcp->a_cmnd->device->hostdata;
5325 if (devip)
5326 atomic_dec(&devip->num_in_q);
5327 sqcp->a_cmnd = NULL;
5328 sd_dp = sqcp->sd_dp;
5329 if (sd_dp) {
5330 l_defer_t = READ_ONCE(sd_dp->defer_t);
5331 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_NONE);
5332 } else
5333 l_defer_t = SDEB_DEFER_NONE;
5334 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5335 stop_qc_helper(sd_dp, l_defer_t);
5336 clear_bit(k, sqp->in_use_bm);
5337 spin_lock_irqsave(&sqp->qc_lock, iflags);
5338 }
5339 }
5340 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5341 }
5342}
5343
5344/* Free queued command memory on heap */
5345static void free_all_queued(void)
5346{
5347 int j, k;
5348 struct sdebug_queue *sqp;
5349 struct sdebug_queued_cmd *sqcp;
5350
5351 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
5352 for (k = 0; k < SDEBUG_CANQUEUE; ++k) {
5353 sqcp = &sqp->qc_arr[k];
5354 kfree(sqcp->sd_dp);
5355 sqcp->sd_dp = NULL;
5356 }
5357 }
5358}
5359
5360static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
5361{
5362 bool ok;
5363
5364 ++num_aborts;
5365 if (SCpnt) {
5366 ok = stop_queued_cmnd(SCpnt);
5367 if (SCpnt->device && (SDEBUG_OPT_ALL_NOISE & sdebug_opts))
5368 sdev_printk(KERN_INFO, SCpnt->device,
5369 "%s: command%s found\n", __func__,
5370 ok ? "" : " not");
5371 }
5372 return SUCCESS;
5373}
5374
5375static int scsi_debug_device_reset(struct scsi_cmnd *SCpnt)
5376{
5377 ++num_dev_resets;
5378 if (SCpnt && SCpnt->device) {
5379 struct scsi_device *sdp = SCpnt->device;
5380 struct sdebug_dev_info *devip =
5381 (struct sdebug_dev_info *)sdp->hostdata;
5382
5383 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5384 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
5385 if (devip)
5386 set_bit(SDEBUG_UA_POR, devip->uas_bm);
5387 }
5388 return SUCCESS;
5389}
5390
5391static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
5392{
5393 struct sdebug_host_info *sdbg_host;
5394 struct sdebug_dev_info *devip;
5395 struct scsi_device *sdp;
5396 struct Scsi_Host *hp;
5397 int k = 0;
5398
5399 ++num_target_resets;
5400 if (!SCpnt)
5401 goto lie;
5402 sdp = SCpnt->device;
5403 if (!sdp)
5404 goto lie;
5405 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5406 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
5407 hp = sdp->host;
5408 if (!hp)
5409 goto lie;
5410 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
5411 if (sdbg_host) {
5412 list_for_each_entry(devip,
5413 &sdbg_host->dev_info_list,
5414 dev_list)
5415 if (devip->target == sdp->id) {
5416 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
5417 ++k;
5418 }
5419 }
5420 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
5421 sdev_printk(KERN_INFO, sdp,
5422 "%s: %d device(s) found in target\n", __func__, k);
5423lie:
5424 return SUCCESS;
5425}
5426
5427static int scsi_debug_bus_reset(struct scsi_cmnd *SCpnt)
5428{
5429 struct sdebug_host_info *sdbg_host;
5430 struct sdebug_dev_info *devip;
5431 struct scsi_device *sdp;
5432 struct Scsi_Host *hp;
5433 int k = 0;
5434
5435 ++num_bus_resets;
5436 if (!(SCpnt && SCpnt->device))
5437 goto lie;
5438 sdp = SCpnt->device;
5439 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5440 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
5441 hp = sdp->host;
5442 if (hp) {
5443 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
5444 if (sdbg_host) {
5445 list_for_each_entry(devip,
5446 &sdbg_host->dev_info_list,
5447 dev_list) {
5448 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
5449 ++k;
5450 }
5451 }
5452 }
5453 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
5454 sdev_printk(KERN_INFO, sdp,
5455 "%s: %d device(s) found in host\n", __func__, k);
5456lie:
5457 return SUCCESS;
5458}
5459
5460static int scsi_debug_host_reset(struct scsi_cmnd *SCpnt)
5461{
5462 struct sdebug_host_info *sdbg_host;
5463 struct sdebug_dev_info *devip;
5464 int k = 0;
5465
5466 ++num_host_resets;
5467 if ((SCpnt->device) && (SDEBUG_OPT_ALL_NOISE & sdebug_opts))
5468 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
5469 spin_lock(&sdebug_host_list_lock);
5470 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
5471 list_for_each_entry(devip, &sdbg_host->dev_info_list,
5472 dev_list) {
5473 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
5474 ++k;
5475 }
5476 }
5477 spin_unlock(&sdebug_host_list_lock);
5478 stop_all_queued();
5479 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
5480 sdev_printk(KERN_INFO, SCpnt->device,
5481 "%s: %d device(s) found\n", __func__, k);
5482 return SUCCESS;
5483}
5484
5485static void sdebug_build_parts(unsigned char *ramp, unsigned long store_size)
5486{
5487 struct msdos_partition *pp;
5488 int starts[SDEBUG_MAX_PARTS + 2], max_part_secs;
5489 int sectors_per_part, num_sectors, k;
5490 int heads_by_sects, start_sec, end_sec;
5491
5492 /* assume partition table already zeroed */
5493 if ((sdebug_num_parts < 1) || (store_size < 1048576))
5494 return;
5495 if (sdebug_num_parts > SDEBUG_MAX_PARTS) {
5496 sdebug_num_parts = SDEBUG_MAX_PARTS;
5497 pr_warn("reducing partitions to %d\n", SDEBUG_MAX_PARTS);
5498 }
5499 num_sectors = (int)get_sdebug_capacity();
5500 sectors_per_part = (num_sectors - sdebug_sectors_per)
5501 / sdebug_num_parts;
5502 heads_by_sects = sdebug_heads * sdebug_sectors_per;
5503 starts[0] = sdebug_sectors_per;
5504 max_part_secs = sectors_per_part;
5505 for (k = 1; k < sdebug_num_parts; ++k) {
5506 starts[k] = ((k * sectors_per_part) / heads_by_sects)
5507 * heads_by_sects;
5508 if (starts[k] - starts[k - 1] < max_part_secs)
5509 max_part_secs = starts[k] - starts[k - 1];
5510 }
5511 starts[sdebug_num_parts] = num_sectors;
5512 starts[sdebug_num_parts + 1] = 0;
5513
5514 ramp[510] = 0x55; /* magic partition markings */
5515 ramp[511] = 0xAA;
5516 pp = (struct msdos_partition *)(ramp + 0x1be);
5517 for (k = 0; starts[k + 1]; ++k, ++pp) {
5518 start_sec = starts[k];
5519 end_sec = starts[k] + max_part_secs - 1;
5520 pp->boot_ind = 0;
5521
5522 pp->cyl = start_sec / heads_by_sects;
5523 pp->head = (start_sec - (pp->cyl * heads_by_sects))
5524 / sdebug_sectors_per;
5525 pp->sector = (start_sec % sdebug_sectors_per) + 1;
5526
5527 pp->end_cyl = end_sec / heads_by_sects;
5528 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
5529 / sdebug_sectors_per;
5530 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
5531
5532 pp->start_sect = cpu_to_le32(start_sec);
5533 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
5534 pp->sys_ind = 0x83; /* plain Linux partition */
5535 }
5536}
5537
5538static void block_unblock_all_queues(bool block)
5539{
5540 int j;
5541 struct sdebug_queue *sqp;
5542
5543 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp)
5544 atomic_set(&sqp->blocked, (int)block);
5545}
5546
5547/* Adjust (by rounding down) the sdebug_cmnd_count so abs(every_nth)-1
5548 * commands will be processed normally before triggers occur.
5549 */
5550static void tweak_cmnd_count(void)
5551{
5552 int count, modulo;
5553
5554 modulo = abs(sdebug_every_nth);
5555 if (modulo < 2)
5556 return;
5557 block_unblock_all_queues(true);
5558 count = atomic_read(&sdebug_cmnd_count);
5559 atomic_set(&sdebug_cmnd_count, (count / modulo) * modulo);
5560 block_unblock_all_queues(false);
5561}
5562
5563static void clear_queue_stats(void)
5564{
5565 atomic_set(&sdebug_cmnd_count, 0);
5566 atomic_set(&sdebug_completions, 0);
5567 atomic_set(&sdebug_miss_cpus, 0);
5568 atomic_set(&sdebug_a_tsf, 0);
5569}
5570
5571static bool inject_on_this_cmd(void)
5572{
5573 if (sdebug_every_nth == 0)
5574 return false;
5575 return (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth)) == 0;
5576}
5577
5578#define INCLUSIVE_TIMING_MAX_NS 1000000 /* 1 millisecond */
5579
5580/* Complete the processing of the thread that queued a SCSI command to this
5581 * driver. It either completes the command by calling cmnd_done() or
5582 * schedules a hr timer or work queue then returns 0. Returns
5583 * SCSI_MLQUEUE_HOST_BUSY if temporarily out of resources.
5584 */
5585static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
5586 int scsi_result,
5587 int (*pfp)(struct scsi_cmnd *,
5588 struct sdebug_dev_info *),
5589 int delta_jiff, int ndelay)
5590{
5591 bool new_sd_dp;
5592 bool inject = false;
5593 bool polled = scsi_cmd_to_rq(cmnd)->cmd_flags & REQ_POLLED;
5594 int k, num_in_q, qdepth;
5595 unsigned long iflags;
5596 u64 ns_from_boot = 0;
5597 struct sdebug_queue *sqp;
5598 struct sdebug_queued_cmd *sqcp;
5599 struct scsi_device *sdp;
5600 struct sdebug_defer *sd_dp;
5601
5602 if (unlikely(devip == NULL)) {
5603 if (scsi_result == 0)
5604 scsi_result = DID_NO_CONNECT << 16;
5605 goto respond_in_thread;
5606 }
5607 sdp = cmnd->device;
5608
5609 if (delta_jiff == 0)
5610 goto respond_in_thread;
5611
5612 sqp = get_queue(cmnd);
5613 spin_lock_irqsave(&sqp->qc_lock, iflags);
5614 if (unlikely(atomic_read(&sqp->blocked))) {
5615 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5616 return SCSI_MLQUEUE_HOST_BUSY;
5617 }
5618 num_in_q = atomic_read(&devip->num_in_q);
5619 qdepth = cmnd->device->queue_depth;
5620 if (unlikely((qdepth > 0) && (num_in_q >= qdepth))) {
5621 if (scsi_result) {
5622 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5623 goto respond_in_thread;
5624 } else
5625 scsi_result = device_qfull_result;
5626 } else if (unlikely(sdebug_every_nth &&
5627 (SDEBUG_OPT_RARE_TSF & sdebug_opts) &&
5628 (scsi_result == 0))) {
5629 if ((num_in_q == (qdepth - 1)) &&
5630 (atomic_inc_return(&sdebug_a_tsf) >=
5631 abs(sdebug_every_nth))) {
5632 atomic_set(&sdebug_a_tsf, 0);
5633 inject = true;
5634 scsi_result = device_qfull_result;
5635 }
5636 }
5637
5638 k = find_first_zero_bit(sqp->in_use_bm, sdebug_max_queue);
5639 if (unlikely(k >= sdebug_max_queue)) {
5640 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5641 if (scsi_result)
5642 goto respond_in_thread;
5643 scsi_result = device_qfull_result;
5644 if (SDEBUG_OPT_Q_NOISE & sdebug_opts)
5645 sdev_printk(KERN_INFO, sdp, "%s: max_queue=%d exceeded: TASK SET FULL\n",
5646 __func__, sdebug_max_queue);
5647 goto respond_in_thread;
5648 }
5649 set_bit(k, sqp->in_use_bm);
5650 atomic_inc(&devip->num_in_q);
5651 sqcp = &sqp->qc_arr[k];
5652 sqcp->a_cmnd = cmnd;
5653 cmnd->host_scribble = (unsigned char *)sqcp;
5654 sd_dp = sqcp->sd_dp;
5655 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5656
5657 if (!sd_dp) {
5658 sd_dp = kzalloc(sizeof(*sd_dp), GFP_ATOMIC);
5659 if (!sd_dp) {
5660 atomic_dec(&devip->num_in_q);
5661 clear_bit(k, sqp->in_use_bm);
5662 return SCSI_MLQUEUE_HOST_BUSY;
5663 }
5664 new_sd_dp = true;
5665 } else {
5666 new_sd_dp = false;
5667 }
5668
5669 /* Set the hostwide tag */
5670 if (sdebug_host_max_queue)
5671 sd_dp->hc_idx = get_tag(cmnd);
5672
5673 if (polled)
5674 ns_from_boot = ktime_get_boottime_ns();
5675
5676 /* one of the resp_*() response functions is called here */
5677 cmnd->result = pfp ? pfp(cmnd, devip) : 0;
5678 if (cmnd->result & SDEG_RES_IMMED_MASK) {
5679 cmnd->result &= ~SDEG_RES_IMMED_MASK;
5680 delta_jiff = ndelay = 0;
5681 }
5682 if (cmnd->result == 0 && scsi_result != 0)
5683 cmnd->result = scsi_result;
5684 if (cmnd->result == 0 && unlikely(sdebug_opts & SDEBUG_OPT_TRANSPORT_ERR)) {
5685 if (atomic_read(&sdeb_inject_pending)) {
5686 mk_sense_buffer(cmnd, ABORTED_COMMAND, TRANSPORT_PROBLEM, ACK_NAK_TO);
5687 atomic_set(&sdeb_inject_pending, 0);
5688 cmnd->result = check_condition_result;
5689 }
5690 }
5691
5692 if (unlikely(sdebug_verbose && cmnd->result))
5693 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
5694 __func__, cmnd->result);
5695
5696 if (delta_jiff > 0 || ndelay > 0) {
5697 ktime_t kt;
5698
5699 if (delta_jiff > 0) {
5700 u64 ns = jiffies_to_nsecs(delta_jiff);
5701
5702 if (sdebug_random && ns < U32_MAX) {
5703 ns = get_random_u32_below((u32)ns);
5704 } else if (sdebug_random) {
5705 ns >>= 12; /* scale to 4 usec precision */
5706 if (ns < U32_MAX) /* over 4 hours max */
5707 ns = get_random_u32_below((u32)ns);
5708 ns <<= 12;
5709 }
5710 kt = ns_to_ktime(ns);
5711 } else { /* ndelay has a 4.2 second max */
5712 kt = sdebug_random ? get_random_u32_below((u32)ndelay) :
5713 (u32)ndelay;
5714 if (ndelay < INCLUSIVE_TIMING_MAX_NS) {
5715 u64 d = ktime_get_boottime_ns() - ns_from_boot;
5716
5717 if (kt <= d) { /* elapsed duration >= kt */
5718 spin_lock_irqsave(&sqp->qc_lock, iflags);
5719 sqcp->a_cmnd = NULL;
5720 atomic_dec(&devip->num_in_q);
5721 clear_bit(k, sqp->in_use_bm);
5722 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5723 if (new_sd_dp)
5724 kfree(sd_dp);
5725 /* call scsi_done() from this thread */
5726 scsi_done(cmnd);
5727 return 0;
5728 }
5729 /* otherwise reduce kt by elapsed time */
5730 kt -= d;
5731 }
5732 }
5733 if (polled) {
5734 sd_dp->cmpl_ts = ktime_add(ns_to_ktime(ns_from_boot), kt);
5735 spin_lock_irqsave(&sqp->qc_lock, iflags);
5736 if (!sd_dp->init_poll) {
5737 sd_dp->init_poll = true;
5738 sqcp->sd_dp = sd_dp;
5739 sd_dp->sqa_idx = sqp - sdebug_q_arr;
5740 sd_dp->qc_idx = k;
5741 }
5742 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_POLL);
5743 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5744 } else {
5745 if (!sd_dp->init_hrt) {
5746 sd_dp->init_hrt = true;
5747 sqcp->sd_dp = sd_dp;
5748 hrtimer_init(&sd_dp->hrt, CLOCK_MONOTONIC,
5749 HRTIMER_MODE_REL_PINNED);
5750 sd_dp->hrt.function = sdebug_q_cmd_hrt_complete;
5751 sd_dp->sqa_idx = sqp - sdebug_q_arr;
5752 sd_dp->qc_idx = k;
5753 }
5754 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_HRT);
5755 /* schedule the invocation of scsi_done() for a later time */
5756 hrtimer_start(&sd_dp->hrt, kt, HRTIMER_MODE_REL_PINNED);
5757 }
5758 if (sdebug_statistics)
5759 sd_dp->issuing_cpu = raw_smp_processor_id();
5760 } else { /* jdelay < 0, use work queue */
5761 if (unlikely((sdebug_opts & SDEBUG_OPT_CMD_ABORT) &&
5762 atomic_read(&sdeb_inject_pending)))
5763 sd_dp->aborted = true;
5764 if (polled) {
5765 sd_dp->cmpl_ts = ns_to_ktime(ns_from_boot);
5766 spin_lock_irqsave(&sqp->qc_lock, iflags);
5767 if (!sd_dp->init_poll) {
5768 sd_dp->init_poll = true;
5769 sqcp->sd_dp = sd_dp;
5770 sd_dp->sqa_idx = sqp - sdebug_q_arr;
5771 sd_dp->qc_idx = k;
5772 }
5773 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_POLL);
5774 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5775 } else {
5776 if (!sd_dp->init_wq) {
5777 sd_dp->init_wq = true;
5778 sqcp->sd_dp = sd_dp;
5779 sd_dp->sqa_idx = sqp - sdebug_q_arr;
5780 sd_dp->qc_idx = k;
5781 INIT_WORK(&sd_dp->ew.work, sdebug_q_cmd_wq_complete);
5782 }
5783 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_WQ);
5784 schedule_work(&sd_dp->ew.work);
5785 }
5786 if (sdebug_statistics)
5787 sd_dp->issuing_cpu = raw_smp_processor_id();
5788 if (unlikely(sd_dp->aborted)) {
5789 sdev_printk(KERN_INFO, sdp, "abort request tag %d\n",
5790 scsi_cmd_to_rq(cmnd)->tag);
5791 blk_abort_request(scsi_cmd_to_rq(cmnd));
5792 atomic_set(&sdeb_inject_pending, 0);
5793 sd_dp->aborted = false;
5794 }
5795 }
5796 if (unlikely((SDEBUG_OPT_Q_NOISE & sdebug_opts) && scsi_result == device_qfull_result))
5797 sdev_printk(KERN_INFO, sdp, "%s: num_in_q=%d +1, %s%s\n", __func__,
5798 num_in_q, (inject ? "<inject> " : ""), "status: TASK SET FULL");
5799 return 0;
5800
5801respond_in_thread: /* call back to mid-layer using invocation thread */
5802 cmnd->result = pfp != NULL ? pfp(cmnd, devip) : 0;
5803 cmnd->result &= ~SDEG_RES_IMMED_MASK;
5804 if (cmnd->result == 0 && scsi_result != 0)
5805 cmnd->result = scsi_result;
5806 scsi_done(cmnd);
5807 return 0;
5808}
5809
5810/* Note: The following macros create attribute files in the
5811 /sys/module/scsi_debug/parameters directory. Unfortunately this
5812 driver is unaware of a change and cannot trigger auxiliary actions
5813 as it can when the corresponding attribute in the
5814 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
5815 */
5816module_param_named(add_host, sdebug_add_host, int, S_IRUGO | S_IWUSR);
5817module_param_named(ato, sdebug_ato, int, S_IRUGO);
5818module_param_named(cdb_len, sdebug_cdb_len, int, 0644);
5819module_param_named(clustering, sdebug_clustering, bool, S_IRUGO | S_IWUSR);
5820module_param_named(delay, sdebug_jdelay, int, S_IRUGO | S_IWUSR);
5821module_param_named(dev_size_mb, sdebug_dev_size_mb, int, S_IRUGO);
5822module_param_named(dif, sdebug_dif, int, S_IRUGO);
5823module_param_named(dix, sdebug_dix, int, S_IRUGO);
5824module_param_named(dsense, sdebug_dsense, int, S_IRUGO | S_IWUSR);
5825module_param_named(every_nth, sdebug_every_nth, int, S_IRUGO | S_IWUSR);
5826module_param_named(fake_rw, sdebug_fake_rw, int, S_IRUGO | S_IWUSR);
5827module_param_named(guard, sdebug_guard, uint, S_IRUGO);
5828module_param_named(host_lock, sdebug_host_lock, bool, S_IRUGO | S_IWUSR);
5829module_param_named(host_max_queue, sdebug_host_max_queue, int, S_IRUGO);
5830module_param_string(inq_product, sdebug_inq_product_id,
5831 sizeof(sdebug_inq_product_id), S_IRUGO | S_IWUSR);
5832module_param_string(inq_rev, sdebug_inq_product_rev,
5833 sizeof(sdebug_inq_product_rev), S_IRUGO | S_IWUSR);
5834module_param_string(inq_vendor, sdebug_inq_vendor_id,
5835 sizeof(sdebug_inq_vendor_id), S_IRUGO | S_IWUSR);
5836module_param_named(lbprz, sdebug_lbprz, int, S_IRUGO);
5837module_param_named(lbpu, sdebug_lbpu, int, S_IRUGO);
5838module_param_named(lbpws, sdebug_lbpws, int, S_IRUGO);
5839module_param_named(lbpws10, sdebug_lbpws10, int, S_IRUGO);
5840module_param_named(lowest_aligned, sdebug_lowest_aligned, int, S_IRUGO);
5841module_param_named(lun_format, sdebug_lun_am_i, int, S_IRUGO | S_IWUSR);
5842module_param_named(max_luns, sdebug_max_luns, int, S_IRUGO | S_IWUSR);
5843module_param_named(max_queue, sdebug_max_queue, int, S_IRUGO | S_IWUSR);
5844module_param_named(medium_error_count, sdebug_medium_error_count, int,
5845 S_IRUGO | S_IWUSR);
5846module_param_named(medium_error_start, sdebug_medium_error_start, int,
5847 S_IRUGO | S_IWUSR);
5848module_param_named(ndelay, sdebug_ndelay, int, S_IRUGO | S_IWUSR);
5849module_param_named(no_lun_0, sdebug_no_lun_0, int, S_IRUGO | S_IWUSR);
5850module_param_named(no_rwlock, sdebug_no_rwlock, bool, S_IRUGO | S_IWUSR);
5851module_param_named(no_uld, sdebug_no_uld, int, S_IRUGO);
5852module_param_named(num_parts, sdebug_num_parts, int, S_IRUGO);
5853module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR);
5854module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO);
5855module_param_named(opt_xferlen_exp, sdebug_opt_xferlen_exp, int, S_IRUGO);
5856module_param_named(opts, sdebug_opts, int, S_IRUGO | S_IWUSR);
5857module_param_named(per_host_store, sdebug_per_host_store, bool,
5858 S_IRUGO | S_IWUSR);
5859module_param_named(physblk_exp, sdebug_physblk_exp, int, S_IRUGO);
5860module_param_named(ptype, sdebug_ptype, int, S_IRUGO | S_IWUSR);
5861module_param_named(random, sdebug_random, bool, S_IRUGO | S_IWUSR);
5862module_param_named(removable, sdebug_removable, bool, S_IRUGO | S_IWUSR);
5863module_param_named(scsi_level, sdebug_scsi_level, int, S_IRUGO);
5864module_param_named(sector_size, sdebug_sector_size, int, S_IRUGO);
5865module_param_named(statistics, sdebug_statistics, bool, S_IRUGO | S_IWUSR);
5866module_param_named(strict, sdebug_strict, bool, S_IRUGO | S_IWUSR);
5867module_param_named(submit_queues, submit_queues, int, S_IRUGO);
5868module_param_named(poll_queues, poll_queues, int, S_IRUGO);
5869module_param_named(tur_ms_to_ready, sdeb_tur_ms_to_ready, int, S_IRUGO);
5870module_param_named(unmap_alignment, sdebug_unmap_alignment, int, S_IRUGO);
5871module_param_named(unmap_granularity, sdebug_unmap_granularity, int, S_IRUGO);
5872module_param_named(unmap_max_blocks, sdebug_unmap_max_blocks, int, S_IRUGO);
5873module_param_named(unmap_max_desc, sdebug_unmap_max_desc, int, S_IRUGO);
5874module_param_named(uuid_ctl, sdebug_uuid_ctl, int, S_IRUGO);
5875module_param_named(virtual_gb, sdebug_virtual_gb, int, S_IRUGO | S_IWUSR);
5876module_param_named(vpd_use_hostno, sdebug_vpd_use_hostno, int,
5877 S_IRUGO | S_IWUSR);
5878module_param_named(wp, sdebug_wp, bool, S_IRUGO | S_IWUSR);
5879module_param_named(write_same_length, sdebug_write_same_length, int,
5880 S_IRUGO | S_IWUSR);
5881module_param_named(zbc, sdeb_zbc_model_s, charp, S_IRUGO);
5882module_param_named(zone_cap_mb, sdeb_zbc_zone_cap_mb, int, S_IRUGO);
5883module_param_named(zone_max_open, sdeb_zbc_max_open, int, S_IRUGO);
5884module_param_named(zone_nr_conv, sdeb_zbc_nr_conv, int, S_IRUGO);
5885module_param_named(zone_size_mb, sdeb_zbc_zone_size_mb, int, S_IRUGO);
5886
5887MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
5888MODULE_DESCRIPTION("SCSI debug adapter driver");
5889MODULE_LICENSE("GPL");
5890MODULE_VERSION(SDEBUG_VERSION);
5891
5892MODULE_PARM_DESC(add_host, "add n hosts, in sysfs if negative remove host(s) (def=1)");
5893MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
5894MODULE_PARM_DESC(cdb_len, "suggest CDB lengths to drivers (def=10)");
5895MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
5896MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
5897MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)");
5898MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
5899MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
5900MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
5901MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
5902MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
5903MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
5904MODULE_PARM_DESC(host_lock, "host_lock is ignored (def=0)");
5905MODULE_PARM_DESC(host_max_queue,
5906 "host max # of queued cmds (0 to max(def) [max_queue fixed equal for !0])");
5907MODULE_PARM_DESC(inq_product, "SCSI INQUIRY product string (def=\"scsi_debug\")");
5908MODULE_PARM_DESC(inq_rev, "SCSI INQUIRY revision string (def=\""
5909 SDEBUG_VERSION "\")");
5910MODULE_PARM_DESC(inq_vendor, "SCSI INQUIRY vendor string (def=\"Linux\")");
5911MODULE_PARM_DESC(lbprz,
5912 "on read unmapped LBs return 0 when 1 (def), return 0xff when 2");
5913MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
5914MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
5915MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
5916MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
5917MODULE_PARM_DESC(lun_format, "LUN format: 0->peripheral (def); 1 --> flat address method");
5918MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
5919MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
5920MODULE_PARM_DESC(medium_error_count, "count of sectors to return follow on MEDIUM error");
5921MODULE_PARM_DESC(medium_error_start, "starting sector number to return MEDIUM error");
5922MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
5923MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
5924MODULE_PARM_DESC(no_rwlock, "don't protect user data reads+writes (def=0)");
5925MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
5926MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
5927MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
5928MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)");
5929MODULE_PARM_DESC(opt_xferlen_exp, "optimal transfer length granularity exponent (def=physblk_exp)");
5930MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
5931MODULE_PARM_DESC(per_host_store, "If set, next positive add_host will get new store (def=0)");
5932MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
5933MODULE_PARM_DESC(poll_queues, "support for iouring iopoll queues (1 to max(submit_queues - 1))");
5934MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
5935MODULE_PARM_DESC(random, "If set, uniformly randomize command duration between 0 and delay_in_ns");
5936MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
5937MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=7[SPC-5])");
5938MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
5939MODULE_PARM_DESC(statistics, "collect statistics on commands, queues (def=0)");
5940MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)");
5941MODULE_PARM_DESC(submit_queues, "support for block multi-queue (def=1)");
5942MODULE_PARM_DESC(tur_ms_to_ready, "TEST UNIT READY millisecs before initial good status (def=0)");
5943MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
5944MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
5945MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
5946MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
5947MODULE_PARM_DESC(uuid_ctl,
5948 "1->use uuid for lu name, 0->don't, 2->all use same (def=0)");
5949MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)");
5950MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
5951MODULE_PARM_DESC(wp, "Write Protect (def=0)");
5952MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
5953MODULE_PARM_DESC(zbc, "'none' [0]; 'aware' [1]; 'managed' [2] (def=0). Can have 'host-' prefix");
5954MODULE_PARM_DESC(zone_cap_mb, "Zone capacity in MiB (def=zone size)");
5955MODULE_PARM_DESC(zone_max_open, "Maximum number of open zones; [0] for no limit (def=auto)");
5956MODULE_PARM_DESC(zone_nr_conv, "Number of conventional zones (def=1)");
5957MODULE_PARM_DESC(zone_size_mb, "Zone size in MiB (def=auto)");
5958
5959#define SDEBUG_INFO_LEN 256
5960static char sdebug_info[SDEBUG_INFO_LEN];
5961
5962static const char *scsi_debug_info(struct Scsi_Host *shp)
5963{
5964 int k;
5965
5966 k = scnprintf(sdebug_info, SDEBUG_INFO_LEN, "%s: version %s [%s]\n",
5967 my_name, SDEBUG_VERSION, sdebug_version_date);
5968 if (k >= (SDEBUG_INFO_LEN - 1))
5969 return sdebug_info;
5970 scnprintf(sdebug_info + k, SDEBUG_INFO_LEN - k,
5971 " dev_size_mb=%d, opts=0x%x, submit_queues=%d, %s=%d",
5972 sdebug_dev_size_mb, sdebug_opts, submit_queues,
5973 "statistics", (int)sdebug_statistics);
5974 return sdebug_info;
5975}
5976
5977/* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */
5978static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer,
5979 int length)
5980{
5981 char arr[16];
5982 int opts;
5983 int minLen = length > 15 ? 15 : length;
5984
5985 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
5986 return -EACCES;
5987 memcpy(arr, buffer, minLen);
5988 arr[minLen] = '\0';
5989 if (1 != sscanf(arr, "%d", &opts))
5990 return -EINVAL;
5991 sdebug_opts = opts;
5992 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
5993 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
5994 if (sdebug_every_nth != 0)
5995 tweak_cmnd_count();
5996 return length;
5997}
5998
5999/* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the
6000 * same for each scsi_debug host (if more than one). Some of the counters
6001 * output are not atomics so might be inaccurate in a busy system. */
6002static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
6003{
6004 int f, j, l;
6005 struct sdebug_queue *sqp;
6006 struct sdebug_host_info *sdhp;
6007
6008 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n",
6009 SDEBUG_VERSION, sdebug_version_date);
6010 seq_printf(m, "num_tgts=%d, %ssize=%d MB, opts=0x%x, every_nth=%d\n",
6011 sdebug_num_tgts, "shared (ram) ", sdebug_dev_size_mb,
6012 sdebug_opts, sdebug_every_nth);
6013 seq_printf(m, "delay=%d, ndelay=%d, max_luns=%d, sector_size=%d %s\n",
6014 sdebug_jdelay, sdebug_ndelay, sdebug_max_luns,
6015 sdebug_sector_size, "bytes");
6016 seq_printf(m, "cylinders=%d, heads=%d, sectors=%d, command aborts=%d\n",
6017 sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per,
6018 num_aborts);
6019 seq_printf(m, "RESETs: device=%d, target=%d, bus=%d, host=%d\n",
6020 num_dev_resets, num_target_resets, num_bus_resets,
6021 num_host_resets);
6022 seq_printf(m, "dix_reads=%d, dix_writes=%d, dif_errors=%d\n",
6023 dix_reads, dix_writes, dif_errors);
6024 seq_printf(m, "usec_in_jiffy=%lu, statistics=%d\n", TICK_NSEC / 1000,
6025 sdebug_statistics);
6026 seq_printf(m, "cmnd_count=%d, completions=%d, %s=%d, a_tsf=%d, mq_polls=%d\n",
6027 atomic_read(&sdebug_cmnd_count),
6028 atomic_read(&sdebug_completions),
6029 "miss_cpus", atomic_read(&sdebug_miss_cpus),
6030 atomic_read(&sdebug_a_tsf),
6031 atomic_read(&sdeb_mq_poll_count));
6032
6033 seq_printf(m, "submit_queues=%d\n", submit_queues);
6034 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
6035 seq_printf(m, " queue %d:\n", j);
6036 f = find_first_bit(sqp->in_use_bm, sdebug_max_queue);
6037 if (f != sdebug_max_queue) {
6038 l = find_last_bit(sqp->in_use_bm, sdebug_max_queue);
6039 seq_printf(m, " in_use_bm BUSY: %s: %d,%d\n",
6040 "first,last bits", f, l);
6041 }
6042 }
6043
6044 seq_printf(m, "this host_no=%d\n", host->host_no);
6045 if (!xa_empty(per_store_ap)) {
6046 bool niu;
6047 int idx;
6048 unsigned long l_idx;
6049 struct sdeb_store_info *sip;
6050
6051 seq_puts(m, "\nhost list:\n");
6052 j = 0;
6053 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
6054 idx = sdhp->si_idx;
6055 seq_printf(m, " %d: host_no=%d, si_idx=%d\n", j,
6056 sdhp->shost->host_no, idx);
6057 ++j;
6058 }
6059 seq_printf(m, "\nper_store array [most_recent_idx=%d]:\n",
6060 sdeb_most_recent_idx);
6061 j = 0;
6062 xa_for_each(per_store_ap, l_idx, sip) {
6063 niu = xa_get_mark(per_store_ap, l_idx,
6064 SDEB_XA_NOT_IN_USE);
6065 idx = (int)l_idx;
6066 seq_printf(m, " %d: idx=%d%s\n", j, idx,
6067 (niu ? " not_in_use" : ""));
6068 ++j;
6069 }
6070 }
6071 return 0;
6072}
6073
6074static ssize_t delay_show(struct device_driver *ddp, char *buf)
6075{
6076 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_jdelay);
6077}
6078/* Returns -EBUSY if jdelay is being changed and commands are queued. The unit
6079 * of delay is jiffies.
6080 */
6081static ssize_t delay_store(struct device_driver *ddp, const char *buf,
6082 size_t count)
6083{
6084 int jdelay, res;
6085
6086 if (count > 0 && sscanf(buf, "%d", &jdelay) == 1) {
6087 res = count;
6088 if (sdebug_jdelay != jdelay) {
6089 int j, k;
6090 struct sdebug_queue *sqp;
6091
6092 block_unblock_all_queues(true);
6093 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
6094 ++j, ++sqp) {
6095 k = find_first_bit(sqp->in_use_bm,
6096 sdebug_max_queue);
6097 if (k != sdebug_max_queue) {
6098 res = -EBUSY; /* queued commands */
6099 break;
6100 }
6101 }
6102 if (res > 0) {
6103 sdebug_jdelay = jdelay;
6104 sdebug_ndelay = 0;
6105 }
6106 block_unblock_all_queues(false);
6107 }
6108 return res;
6109 }
6110 return -EINVAL;
6111}
6112static DRIVER_ATTR_RW(delay);
6113
6114static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
6115{
6116 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ndelay);
6117}
6118/* Returns -EBUSY if ndelay is being changed and commands are queued */
6119/* If > 0 and accepted then sdebug_jdelay is set to JDELAY_OVERRIDDEN */
6120static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
6121 size_t count)
6122{
6123 int ndelay, res;
6124
6125 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
6126 (ndelay >= 0) && (ndelay < (1000 * 1000 * 1000))) {
6127 res = count;
6128 if (sdebug_ndelay != ndelay) {
6129 int j, k;
6130 struct sdebug_queue *sqp;
6131
6132 block_unblock_all_queues(true);
6133 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
6134 ++j, ++sqp) {
6135 k = find_first_bit(sqp->in_use_bm,
6136 sdebug_max_queue);
6137 if (k != sdebug_max_queue) {
6138 res = -EBUSY; /* queued commands */
6139 break;
6140 }
6141 }
6142 if (res > 0) {
6143 sdebug_ndelay = ndelay;
6144 sdebug_jdelay = ndelay ? JDELAY_OVERRIDDEN
6145 : DEF_JDELAY;
6146 }
6147 block_unblock_all_queues(false);
6148 }
6149 return res;
6150 }
6151 return -EINVAL;
6152}
6153static DRIVER_ATTR_RW(ndelay);
6154
6155static ssize_t opts_show(struct device_driver *ddp, char *buf)
6156{
6157 return scnprintf(buf, PAGE_SIZE, "0x%x\n", sdebug_opts);
6158}
6159
6160static ssize_t opts_store(struct device_driver *ddp, const char *buf,
6161 size_t count)
6162{
6163 int opts;
6164 char work[20];
6165
6166 if (sscanf(buf, "%10s", work) == 1) {
6167 if (strncasecmp(work, "0x", 2) == 0) {
6168 if (kstrtoint(work + 2, 16, &opts) == 0)
6169 goto opts_done;
6170 } else {
6171 if (kstrtoint(work, 10, &opts) == 0)
6172 goto opts_done;
6173 }
6174 }
6175 return -EINVAL;
6176opts_done:
6177 sdebug_opts = opts;
6178 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
6179 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
6180 tweak_cmnd_count();
6181 return count;
6182}
6183static DRIVER_ATTR_RW(opts);
6184
6185static ssize_t ptype_show(struct device_driver *ddp, char *buf)
6186{
6187 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ptype);
6188}
6189static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
6190 size_t count)
6191{
6192 int n;
6193
6194 /* Cannot change from or to TYPE_ZBC with sysfs */
6195 if (sdebug_ptype == TYPE_ZBC)
6196 return -EINVAL;
6197
6198 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6199 if (n == TYPE_ZBC)
6200 return -EINVAL;
6201 sdebug_ptype = n;
6202 return count;
6203 }
6204 return -EINVAL;
6205}
6206static DRIVER_ATTR_RW(ptype);
6207
6208static ssize_t dsense_show(struct device_driver *ddp, char *buf)
6209{
6210 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dsense);
6211}
6212static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
6213 size_t count)
6214{
6215 int n;
6216
6217 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6218 sdebug_dsense = n;
6219 return count;
6220 }
6221 return -EINVAL;
6222}
6223static DRIVER_ATTR_RW(dsense);
6224
6225static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
6226{
6227 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_fake_rw);
6228}
6229static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
6230 size_t count)
6231{
6232 int n, idx;
6233
6234 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6235 bool want_store = (n == 0);
6236 struct sdebug_host_info *sdhp;
6237
6238 n = (n > 0);
6239 sdebug_fake_rw = (sdebug_fake_rw > 0);
6240 if (sdebug_fake_rw == n)
6241 return count; /* not transitioning so do nothing */
6242
6243 if (want_store) { /* 1 --> 0 transition, set up store */
6244 if (sdeb_first_idx < 0) {
6245 idx = sdebug_add_store();
6246 if (idx < 0)
6247 return idx;
6248 } else {
6249 idx = sdeb_first_idx;
6250 xa_clear_mark(per_store_ap, idx,
6251 SDEB_XA_NOT_IN_USE);
6252 }
6253 /* make all hosts use same store */
6254 list_for_each_entry(sdhp, &sdebug_host_list,
6255 host_list) {
6256 if (sdhp->si_idx != idx) {
6257 xa_set_mark(per_store_ap, sdhp->si_idx,
6258 SDEB_XA_NOT_IN_USE);
6259 sdhp->si_idx = idx;
6260 }
6261 }
6262 sdeb_most_recent_idx = idx;
6263 } else { /* 0 --> 1 transition is trigger for shrink */
6264 sdebug_erase_all_stores(true /* apart from first */);
6265 }
6266 sdebug_fake_rw = n;
6267 return count;
6268 }
6269 return -EINVAL;
6270}
6271static DRIVER_ATTR_RW(fake_rw);
6272
6273static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
6274{
6275 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_lun_0);
6276}
6277static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
6278 size_t count)
6279{
6280 int n;
6281
6282 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6283 sdebug_no_lun_0 = n;
6284 return count;
6285 }
6286 return -EINVAL;
6287}
6288static DRIVER_ATTR_RW(no_lun_0);
6289
6290static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
6291{
6292 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_tgts);
6293}
6294static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
6295 size_t count)
6296{
6297 int n;
6298
6299 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6300 sdebug_num_tgts = n;
6301 sdebug_max_tgts_luns();
6302 return count;
6303 }
6304 return -EINVAL;
6305}
6306static DRIVER_ATTR_RW(num_tgts);
6307
6308static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
6309{
6310 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dev_size_mb);
6311}
6312static DRIVER_ATTR_RO(dev_size_mb);
6313
6314static ssize_t per_host_store_show(struct device_driver *ddp, char *buf)
6315{
6316 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_per_host_store);
6317}
6318
6319static ssize_t per_host_store_store(struct device_driver *ddp, const char *buf,
6320 size_t count)
6321{
6322 bool v;
6323
6324 if (kstrtobool(buf, &v))
6325 return -EINVAL;
6326
6327 sdebug_per_host_store = v;
6328 return count;
6329}
6330static DRIVER_ATTR_RW(per_host_store);
6331
6332static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
6333{
6334 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_parts);
6335}
6336static DRIVER_ATTR_RO(num_parts);
6337
6338static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
6339{
6340 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_every_nth);
6341}
6342static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
6343 size_t count)
6344{
6345 int nth;
6346 char work[20];
6347
6348 if (sscanf(buf, "%10s", work) == 1) {
6349 if (strncasecmp(work, "0x", 2) == 0) {
6350 if (kstrtoint(work + 2, 16, &nth) == 0)
6351 goto every_nth_done;
6352 } else {
6353 if (kstrtoint(work, 10, &nth) == 0)
6354 goto every_nth_done;
6355 }
6356 }
6357 return -EINVAL;
6358
6359every_nth_done:
6360 sdebug_every_nth = nth;
6361 if (nth && !sdebug_statistics) {
6362 pr_info("every_nth needs statistics=1, set it\n");
6363 sdebug_statistics = true;
6364 }
6365 tweak_cmnd_count();
6366 return count;
6367}
6368static DRIVER_ATTR_RW(every_nth);
6369
6370static ssize_t lun_format_show(struct device_driver *ddp, char *buf)
6371{
6372 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_lun_am);
6373}
6374static ssize_t lun_format_store(struct device_driver *ddp, const char *buf,
6375 size_t count)
6376{
6377 int n;
6378 bool changed;
6379
6380 if (kstrtoint(buf, 0, &n))
6381 return -EINVAL;
6382 if (n >= 0) {
6383 if (n > (int)SAM_LUN_AM_FLAT) {
6384 pr_warn("only LUN address methods 0 and 1 are supported\n");
6385 return -EINVAL;
6386 }
6387 changed = ((int)sdebug_lun_am != n);
6388 sdebug_lun_am = n;
6389 if (changed && sdebug_scsi_level >= 5) { /* >= SPC-3 */
6390 struct sdebug_host_info *sdhp;
6391 struct sdebug_dev_info *dp;
6392
6393 spin_lock(&sdebug_host_list_lock);
6394 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
6395 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
6396 set_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
6397 }
6398 }
6399 spin_unlock(&sdebug_host_list_lock);
6400 }
6401 return count;
6402 }
6403 return -EINVAL;
6404}
6405static DRIVER_ATTR_RW(lun_format);
6406
6407static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
6408{
6409 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_luns);
6410}
6411static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
6412 size_t count)
6413{
6414 int n;
6415 bool changed;
6416
6417 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6418 if (n > 256) {
6419 pr_warn("max_luns can be no more than 256\n");
6420 return -EINVAL;
6421 }
6422 changed = (sdebug_max_luns != n);
6423 sdebug_max_luns = n;
6424 sdebug_max_tgts_luns();
6425 if (changed && (sdebug_scsi_level >= 5)) { /* >= SPC-3 */
6426 struct sdebug_host_info *sdhp;
6427 struct sdebug_dev_info *dp;
6428
6429 spin_lock(&sdebug_host_list_lock);
6430 list_for_each_entry(sdhp, &sdebug_host_list,
6431 host_list) {
6432 list_for_each_entry(dp, &sdhp->dev_info_list,
6433 dev_list) {
6434 set_bit(SDEBUG_UA_LUNS_CHANGED,
6435 dp->uas_bm);
6436 }
6437 }
6438 spin_unlock(&sdebug_host_list_lock);
6439 }
6440 return count;
6441 }
6442 return -EINVAL;
6443}
6444static DRIVER_ATTR_RW(max_luns);
6445
6446static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
6447{
6448 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_queue);
6449}
6450/* N.B. max_queue can be changed while there are queued commands. In flight
6451 * commands beyond the new max_queue will be completed. */
6452static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
6453 size_t count)
6454{
6455 int j, n, k, a;
6456 struct sdebug_queue *sqp;
6457
6458 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
6459 (n <= SDEBUG_CANQUEUE) &&
6460 (sdebug_host_max_queue == 0)) {
6461 block_unblock_all_queues(true);
6462 k = 0;
6463 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
6464 ++j, ++sqp) {
6465 a = find_last_bit(sqp->in_use_bm, SDEBUG_CANQUEUE);
6466 if (a > k)
6467 k = a;
6468 }
6469 sdebug_max_queue = n;
6470 if (k == SDEBUG_CANQUEUE)
6471 atomic_set(&retired_max_queue, 0);
6472 else if (k >= n)
6473 atomic_set(&retired_max_queue, k + 1);
6474 else
6475 atomic_set(&retired_max_queue, 0);
6476 block_unblock_all_queues(false);
6477 return count;
6478 }
6479 return -EINVAL;
6480}
6481static DRIVER_ATTR_RW(max_queue);
6482
6483static ssize_t host_max_queue_show(struct device_driver *ddp, char *buf)
6484{
6485 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_host_max_queue);
6486}
6487
6488static ssize_t no_rwlock_show(struct device_driver *ddp, char *buf)
6489{
6490 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_rwlock);
6491}
6492
6493static ssize_t no_rwlock_store(struct device_driver *ddp, const char *buf, size_t count)
6494{
6495 bool v;
6496
6497 if (kstrtobool(buf, &v))
6498 return -EINVAL;
6499
6500 sdebug_no_rwlock = v;
6501 return count;
6502}
6503static DRIVER_ATTR_RW(no_rwlock);
6504
6505/*
6506 * Since this is used for .can_queue, and we get the hc_idx tag from the bitmap
6507 * in range [0, sdebug_host_max_queue), we can't change it.
6508 */
6509static DRIVER_ATTR_RO(host_max_queue);
6510
6511static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
6512{
6513 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_uld);
6514}
6515static DRIVER_ATTR_RO(no_uld);
6516
6517static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
6518{
6519 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_scsi_level);
6520}
6521static DRIVER_ATTR_RO(scsi_level);
6522
6523static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
6524{
6525 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_virtual_gb);
6526}
6527static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
6528 size_t count)
6529{
6530 int n;
6531 bool changed;
6532
6533 /* Ignore capacity change for ZBC drives for now */
6534 if (sdeb_zbc_in_use)
6535 return -ENOTSUPP;
6536
6537 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6538 changed = (sdebug_virtual_gb != n);
6539 sdebug_virtual_gb = n;
6540 sdebug_capacity = get_sdebug_capacity();
6541 if (changed) {
6542 struct sdebug_host_info *sdhp;
6543 struct sdebug_dev_info *dp;
6544
6545 spin_lock(&sdebug_host_list_lock);
6546 list_for_each_entry(sdhp, &sdebug_host_list,
6547 host_list) {
6548 list_for_each_entry(dp, &sdhp->dev_info_list,
6549 dev_list) {
6550 set_bit(SDEBUG_UA_CAPACITY_CHANGED,
6551 dp->uas_bm);
6552 }
6553 }
6554 spin_unlock(&sdebug_host_list_lock);
6555 }
6556 return count;
6557 }
6558 return -EINVAL;
6559}
6560static DRIVER_ATTR_RW(virtual_gb);
6561
6562static ssize_t add_host_show(struct device_driver *ddp, char *buf)
6563{
6564 /* absolute number of hosts currently active is what is shown */
6565 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_hosts);
6566}
6567
6568static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
6569 size_t count)
6570{
6571 bool found;
6572 unsigned long idx;
6573 struct sdeb_store_info *sip;
6574 bool want_phs = (sdebug_fake_rw == 0) && sdebug_per_host_store;
6575 int delta_hosts;
6576
6577 if (sscanf(buf, "%d", &delta_hosts) != 1)
6578 return -EINVAL;
6579 if (delta_hosts > 0) {
6580 do {
6581 found = false;
6582 if (want_phs) {
6583 xa_for_each_marked(per_store_ap, idx, sip,
6584 SDEB_XA_NOT_IN_USE) {
6585 sdeb_most_recent_idx = (int)idx;
6586 found = true;
6587 break;
6588 }
6589 if (found) /* re-use case */
6590 sdebug_add_host_helper((int)idx);
6591 else
6592 sdebug_do_add_host(true);
6593 } else {
6594 sdebug_do_add_host(false);
6595 }
6596 } while (--delta_hosts);
6597 } else if (delta_hosts < 0) {
6598 do {
6599 sdebug_do_remove_host(false);
6600 } while (++delta_hosts);
6601 }
6602 return count;
6603}
6604static DRIVER_ATTR_RW(add_host);
6605
6606static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
6607{
6608 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_vpd_use_hostno);
6609}
6610static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
6611 size_t count)
6612{
6613 int n;
6614
6615 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6616 sdebug_vpd_use_hostno = n;
6617 return count;
6618 }
6619 return -EINVAL;
6620}
6621static DRIVER_ATTR_RW(vpd_use_hostno);
6622
6623static ssize_t statistics_show(struct device_driver *ddp, char *buf)
6624{
6625 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_statistics);
6626}
6627static ssize_t statistics_store(struct device_driver *ddp, const char *buf,
6628 size_t count)
6629{
6630 int n;
6631
6632 if ((count > 0) && (sscanf(buf, "%d", &n) == 1) && (n >= 0)) {
6633 if (n > 0)
6634 sdebug_statistics = true;
6635 else {
6636 clear_queue_stats();
6637 sdebug_statistics = false;
6638 }
6639 return count;
6640 }
6641 return -EINVAL;
6642}
6643static DRIVER_ATTR_RW(statistics);
6644
6645static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
6646{
6647 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_sector_size);
6648}
6649static DRIVER_ATTR_RO(sector_size);
6650
6651static ssize_t submit_queues_show(struct device_driver *ddp, char *buf)
6652{
6653 return scnprintf(buf, PAGE_SIZE, "%d\n", submit_queues);
6654}
6655static DRIVER_ATTR_RO(submit_queues);
6656
6657static ssize_t dix_show(struct device_driver *ddp, char *buf)
6658{
6659 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dix);
6660}
6661static DRIVER_ATTR_RO(dix);
6662
6663static ssize_t dif_show(struct device_driver *ddp, char *buf)
6664{
6665 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dif);
6666}
6667static DRIVER_ATTR_RO(dif);
6668
6669static ssize_t guard_show(struct device_driver *ddp, char *buf)
6670{
6671 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_guard);
6672}
6673static DRIVER_ATTR_RO(guard);
6674
6675static ssize_t ato_show(struct device_driver *ddp, char *buf)
6676{
6677 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ato);
6678}
6679static DRIVER_ATTR_RO(ato);
6680
6681static ssize_t map_show(struct device_driver *ddp, char *buf)
6682{
6683 ssize_t count = 0;
6684
6685 if (!scsi_debug_lbp())
6686 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
6687 sdebug_store_sectors);
6688
6689 if (sdebug_fake_rw == 0 && !xa_empty(per_store_ap)) {
6690 struct sdeb_store_info *sip = xa_load(per_store_ap, 0);
6691
6692 if (sip)
6693 count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
6694 (int)map_size, sip->map_storep);
6695 }
6696 buf[count++] = '\n';
6697 buf[count] = '\0';
6698
6699 return count;
6700}
6701static DRIVER_ATTR_RO(map);
6702
6703static ssize_t random_show(struct device_driver *ddp, char *buf)
6704{
6705 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_random);
6706}
6707
6708static ssize_t random_store(struct device_driver *ddp, const char *buf,
6709 size_t count)
6710{
6711 bool v;
6712
6713 if (kstrtobool(buf, &v))
6714 return -EINVAL;
6715
6716 sdebug_random = v;
6717 return count;
6718}
6719static DRIVER_ATTR_RW(random);
6720
6721static ssize_t removable_show(struct device_driver *ddp, char *buf)
6722{
6723 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_removable ? 1 : 0);
6724}
6725static ssize_t removable_store(struct device_driver *ddp, const char *buf,
6726 size_t count)
6727{
6728 int n;
6729
6730 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6731 sdebug_removable = (n > 0);
6732 return count;
6733 }
6734 return -EINVAL;
6735}
6736static DRIVER_ATTR_RW(removable);
6737
6738static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
6739{
6740 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_host_lock);
6741}
6742/* N.B. sdebug_host_lock does nothing, kept for backward compatibility */
6743static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
6744 size_t count)
6745{
6746 int n;
6747
6748 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6749 sdebug_host_lock = (n > 0);
6750 return count;
6751 }
6752 return -EINVAL;
6753}
6754static DRIVER_ATTR_RW(host_lock);
6755
6756static ssize_t strict_show(struct device_driver *ddp, char *buf)
6757{
6758 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_strict);
6759}
6760static ssize_t strict_store(struct device_driver *ddp, const char *buf,
6761 size_t count)
6762{
6763 int n;
6764
6765 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6766 sdebug_strict = (n > 0);
6767 return count;
6768 }
6769 return -EINVAL;
6770}
6771static DRIVER_ATTR_RW(strict);
6772
6773static ssize_t uuid_ctl_show(struct device_driver *ddp, char *buf)
6774{
6775 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_uuid_ctl);
6776}
6777static DRIVER_ATTR_RO(uuid_ctl);
6778
6779static ssize_t cdb_len_show(struct device_driver *ddp, char *buf)
6780{
6781 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_cdb_len);
6782}
6783static ssize_t cdb_len_store(struct device_driver *ddp, const char *buf,
6784 size_t count)
6785{
6786 int ret, n;
6787
6788 ret = kstrtoint(buf, 0, &n);
6789 if (ret)
6790 return ret;
6791 sdebug_cdb_len = n;
6792 all_config_cdb_len();
6793 return count;
6794}
6795static DRIVER_ATTR_RW(cdb_len);
6796
6797static const char * const zbc_model_strs_a[] = {
6798 [BLK_ZONED_NONE] = "none",
6799 [BLK_ZONED_HA] = "host-aware",
6800 [BLK_ZONED_HM] = "host-managed",
6801};
6802
6803static const char * const zbc_model_strs_b[] = {
6804 [BLK_ZONED_NONE] = "no",
6805 [BLK_ZONED_HA] = "aware",
6806 [BLK_ZONED_HM] = "managed",
6807};
6808
6809static const char * const zbc_model_strs_c[] = {
6810 [BLK_ZONED_NONE] = "0",
6811 [BLK_ZONED_HA] = "1",
6812 [BLK_ZONED_HM] = "2",
6813};
6814
6815static int sdeb_zbc_model_str(const char *cp)
6816{
6817 int res = sysfs_match_string(zbc_model_strs_a, cp);
6818
6819 if (res < 0) {
6820 res = sysfs_match_string(zbc_model_strs_b, cp);
6821 if (res < 0) {
6822 res = sysfs_match_string(zbc_model_strs_c, cp);
6823 if (res < 0)
6824 return -EINVAL;
6825 }
6826 }
6827 return res;
6828}
6829
6830static ssize_t zbc_show(struct device_driver *ddp, char *buf)
6831{
6832 return scnprintf(buf, PAGE_SIZE, "%s\n",
6833 zbc_model_strs_a[sdeb_zbc_model]);
6834}
6835static DRIVER_ATTR_RO(zbc);
6836
6837static ssize_t tur_ms_to_ready_show(struct device_driver *ddp, char *buf)
6838{
6839 return scnprintf(buf, PAGE_SIZE, "%d\n", sdeb_tur_ms_to_ready);
6840}
6841static DRIVER_ATTR_RO(tur_ms_to_ready);
6842
6843/* Note: The following array creates attribute files in the
6844 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
6845 files (over those found in the /sys/module/scsi_debug/parameters
6846 directory) is that auxiliary actions can be triggered when an attribute
6847 is changed. For example see: add_host_store() above.
6848 */
6849
6850static struct attribute *sdebug_drv_attrs[] = {
6851 &driver_attr_delay.attr,
6852 &driver_attr_opts.attr,
6853 &driver_attr_ptype.attr,
6854 &driver_attr_dsense.attr,
6855 &driver_attr_fake_rw.attr,
6856 &driver_attr_host_max_queue.attr,
6857 &driver_attr_no_lun_0.attr,
6858 &driver_attr_num_tgts.attr,
6859 &driver_attr_dev_size_mb.attr,
6860 &driver_attr_num_parts.attr,
6861 &driver_attr_every_nth.attr,
6862 &driver_attr_lun_format.attr,
6863 &driver_attr_max_luns.attr,
6864 &driver_attr_max_queue.attr,
6865 &driver_attr_no_rwlock.attr,
6866 &driver_attr_no_uld.attr,
6867 &driver_attr_scsi_level.attr,
6868 &driver_attr_virtual_gb.attr,
6869 &driver_attr_add_host.attr,
6870 &driver_attr_per_host_store.attr,
6871 &driver_attr_vpd_use_hostno.attr,
6872 &driver_attr_sector_size.attr,
6873 &driver_attr_statistics.attr,
6874 &driver_attr_submit_queues.attr,
6875 &driver_attr_dix.attr,
6876 &driver_attr_dif.attr,
6877 &driver_attr_guard.attr,
6878 &driver_attr_ato.attr,
6879 &driver_attr_map.attr,
6880 &driver_attr_random.attr,
6881 &driver_attr_removable.attr,
6882 &driver_attr_host_lock.attr,
6883 &driver_attr_ndelay.attr,
6884 &driver_attr_strict.attr,
6885 &driver_attr_uuid_ctl.attr,
6886 &driver_attr_cdb_len.attr,
6887 &driver_attr_tur_ms_to_ready.attr,
6888 &driver_attr_zbc.attr,
6889 NULL,
6890};
6891ATTRIBUTE_GROUPS(sdebug_drv);
6892
6893static struct device *pseudo_primary;
6894
6895static int __init scsi_debug_init(void)
6896{
6897 bool want_store = (sdebug_fake_rw == 0);
6898 unsigned long sz;
6899 int k, ret, hosts_to_add;
6900 int idx = -1;
6901
6902 ramdisk_lck_a[0] = &atomic_rw;
6903 ramdisk_lck_a[1] = &atomic_rw2;
6904 atomic_set(&retired_max_queue, 0);
6905
6906 if (sdebug_ndelay >= 1000 * 1000 * 1000) {
6907 pr_warn("ndelay must be less than 1 second, ignored\n");
6908 sdebug_ndelay = 0;
6909 } else if (sdebug_ndelay > 0)
6910 sdebug_jdelay = JDELAY_OVERRIDDEN;
6911
6912 switch (sdebug_sector_size) {
6913 case 512:
6914 case 1024:
6915 case 2048:
6916 case 4096:
6917 break;
6918 default:
6919 pr_err("invalid sector_size %d\n", sdebug_sector_size);
6920 return -EINVAL;
6921 }
6922
6923 switch (sdebug_dif) {
6924 case T10_PI_TYPE0_PROTECTION:
6925 break;
6926 case T10_PI_TYPE1_PROTECTION:
6927 case T10_PI_TYPE2_PROTECTION:
6928 case T10_PI_TYPE3_PROTECTION:
6929 have_dif_prot = true;
6930 break;
6931
6932 default:
6933 pr_err("dif must be 0, 1, 2 or 3\n");
6934 return -EINVAL;
6935 }
6936
6937 if (sdebug_num_tgts < 0) {
6938 pr_err("num_tgts must be >= 0\n");
6939 return -EINVAL;
6940 }
6941
6942 if (sdebug_guard > 1) {
6943 pr_err("guard must be 0 or 1\n");
6944 return -EINVAL;
6945 }
6946
6947 if (sdebug_ato > 1) {
6948 pr_err("ato must be 0 or 1\n");
6949 return -EINVAL;
6950 }
6951
6952 if (sdebug_physblk_exp > 15) {
6953 pr_err("invalid physblk_exp %u\n", sdebug_physblk_exp);
6954 return -EINVAL;
6955 }
6956
6957 sdebug_lun_am = sdebug_lun_am_i;
6958 if (sdebug_lun_am > SAM_LUN_AM_FLAT) {
6959 pr_warn("Invalid LUN format %u, using default\n", (int)sdebug_lun_am);
6960 sdebug_lun_am = SAM_LUN_AM_PERIPHERAL;
6961 }
6962
6963 if (sdebug_max_luns > 256) {
6964 if (sdebug_max_luns > 16384) {
6965 pr_warn("max_luns can be no more than 16384, use default\n");
6966 sdebug_max_luns = DEF_MAX_LUNS;
6967 }
6968 sdebug_lun_am = SAM_LUN_AM_FLAT;
6969 }
6970
6971 if (sdebug_lowest_aligned > 0x3fff) {
6972 pr_err("lowest_aligned too big: %u\n", sdebug_lowest_aligned);
6973 return -EINVAL;
6974 }
6975
6976 if (submit_queues < 1) {
6977 pr_err("submit_queues must be 1 or more\n");
6978 return -EINVAL;
6979 }
6980
6981 if ((sdebug_max_queue > SDEBUG_CANQUEUE) || (sdebug_max_queue < 1)) {
6982 pr_err("max_queue must be in range [1, %d]\n", SDEBUG_CANQUEUE);
6983 return -EINVAL;
6984 }
6985
6986 if ((sdebug_host_max_queue > SDEBUG_CANQUEUE) ||
6987 (sdebug_host_max_queue < 0)) {
6988 pr_err("host_max_queue must be in range [0 %d]\n",
6989 SDEBUG_CANQUEUE);
6990 return -EINVAL;
6991 }
6992
6993 if (sdebug_host_max_queue &&
6994 (sdebug_max_queue != sdebug_host_max_queue)) {
6995 sdebug_max_queue = sdebug_host_max_queue;
6996 pr_warn("fixing max submit queue depth to host max queue depth, %d\n",
6997 sdebug_max_queue);
6998 }
6999
7000 sdebug_q_arr = kcalloc(submit_queues, sizeof(struct sdebug_queue),
7001 GFP_KERNEL);
7002 if (sdebug_q_arr == NULL)
7003 return -ENOMEM;
7004 for (k = 0; k < submit_queues; ++k)
7005 spin_lock_init(&sdebug_q_arr[k].qc_lock);
7006
7007 /*
7008 * check for host managed zoned block device specified with
7009 * ptype=0x14 or zbc=XXX.
7010 */
7011 if (sdebug_ptype == TYPE_ZBC) {
7012 sdeb_zbc_model = BLK_ZONED_HM;
7013 } else if (sdeb_zbc_model_s && *sdeb_zbc_model_s) {
7014 k = sdeb_zbc_model_str(sdeb_zbc_model_s);
7015 if (k < 0) {
7016 ret = k;
7017 goto free_q_arr;
7018 }
7019 sdeb_zbc_model = k;
7020 switch (sdeb_zbc_model) {
7021 case BLK_ZONED_NONE:
7022 case BLK_ZONED_HA:
7023 sdebug_ptype = TYPE_DISK;
7024 break;
7025 case BLK_ZONED_HM:
7026 sdebug_ptype = TYPE_ZBC;
7027 break;
7028 default:
7029 pr_err("Invalid ZBC model\n");
7030 ret = -EINVAL;
7031 goto free_q_arr;
7032 }
7033 }
7034 if (sdeb_zbc_model != BLK_ZONED_NONE) {
7035 sdeb_zbc_in_use = true;
7036 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT)
7037 sdebug_dev_size_mb = DEF_ZBC_DEV_SIZE_MB;
7038 }
7039
7040 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT)
7041 sdebug_dev_size_mb = DEF_DEV_SIZE_MB;
7042 if (sdebug_dev_size_mb < 1)
7043 sdebug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
7044 sz = (unsigned long)sdebug_dev_size_mb * 1048576;
7045 sdebug_store_sectors = sz / sdebug_sector_size;
7046 sdebug_capacity = get_sdebug_capacity();
7047
7048 /* play around with geometry, don't waste too much on track 0 */
7049 sdebug_heads = 8;
7050 sdebug_sectors_per = 32;
7051 if (sdebug_dev_size_mb >= 256)
7052 sdebug_heads = 64;
7053 else if (sdebug_dev_size_mb >= 16)
7054 sdebug_heads = 32;
7055 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
7056 (sdebug_sectors_per * sdebug_heads);
7057 if (sdebug_cylinders_per >= 1024) {
7058 /* other LLDs do this; implies >= 1GB ram disk ... */
7059 sdebug_heads = 255;
7060 sdebug_sectors_per = 63;
7061 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
7062 (sdebug_sectors_per * sdebug_heads);
7063 }
7064 if (scsi_debug_lbp()) {
7065 sdebug_unmap_max_blocks =
7066 clamp(sdebug_unmap_max_blocks, 0U, 0xffffffffU);
7067
7068 sdebug_unmap_max_desc =
7069 clamp(sdebug_unmap_max_desc, 0U, 256U);
7070
7071 sdebug_unmap_granularity =
7072 clamp(sdebug_unmap_granularity, 1U, 0xffffffffU);
7073
7074 if (sdebug_unmap_alignment &&
7075 sdebug_unmap_granularity <=
7076 sdebug_unmap_alignment) {
7077 pr_err("ERR: unmap_granularity <= unmap_alignment\n");
7078 ret = -EINVAL;
7079 goto free_q_arr;
7080 }
7081 }
7082 xa_init_flags(per_store_ap, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ);
7083 if (want_store) {
7084 idx = sdebug_add_store();
7085 if (idx < 0) {
7086 ret = idx;
7087 goto free_q_arr;
7088 }
7089 }
7090
7091 pseudo_primary = root_device_register("pseudo_0");
7092 if (IS_ERR(pseudo_primary)) {
7093 pr_warn("root_device_register() error\n");
7094 ret = PTR_ERR(pseudo_primary);
7095 goto free_vm;
7096 }
7097 ret = bus_register(&pseudo_lld_bus);
7098 if (ret < 0) {
7099 pr_warn("bus_register error: %d\n", ret);
7100 goto dev_unreg;
7101 }
7102 ret = driver_register(&sdebug_driverfs_driver);
7103 if (ret < 0) {
7104 pr_warn("driver_register error: %d\n", ret);
7105 goto bus_unreg;
7106 }
7107
7108 hosts_to_add = sdebug_add_host;
7109 sdebug_add_host = 0;
7110
7111 for (k = 0; k < hosts_to_add; k++) {
7112 if (want_store && k == 0) {
7113 ret = sdebug_add_host_helper(idx);
7114 if (ret < 0) {
7115 pr_err("add_host_helper k=%d, error=%d\n",
7116 k, -ret);
7117 break;
7118 }
7119 } else {
7120 ret = sdebug_do_add_host(want_store &&
7121 sdebug_per_host_store);
7122 if (ret < 0) {
7123 pr_err("add_host k=%d error=%d\n", k, -ret);
7124 break;
7125 }
7126 }
7127 }
7128 if (sdebug_verbose)
7129 pr_info("built %d host(s)\n", sdebug_num_hosts);
7130
7131 return 0;
7132
7133bus_unreg:
7134 bus_unregister(&pseudo_lld_bus);
7135dev_unreg:
7136 root_device_unregister(pseudo_primary);
7137free_vm:
7138 sdebug_erase_store(idx, NULL);
7139free_q_arr:
7140 kfree(sdebug_q_arr);
7141 return ret;
7142}
7143
7144static void __exit scsi_debug_exit(void)
7145{
7146 int k = sdebug_num_hosts;
7147
7148 stop_all_queued();
7149 for (; k; k--)
7150 sdebug_do_remove_host(true);
7151 free_all_queued();
7152 driver_unregister(&sdebug_driverfs_driver);
7153 bus_unregister(&pseudo_lld_bus);
7154 root_device_unregister(pseudo_primary);
7155
7156 sdebug_erase_all_stores(false);
7157 xa_destroy(per_store_ap);
7158 kfree(sdebug_q_arr);
7159}
7160
7161device_initcall(scsi_debug_init);
7162module_exit(scsi_debug_exit);
7163
7164static void sdebug_release_adapter(struct device *dev)
7165{
7166 struct sdebug_host_info *sdbg_host;
7167
7168 sdbg_host = to_sdebug_host(dev);
7169 kfree(sdbg_host);
7170}
7171
7172/* idx must be valid, if sip is NULL then it will be obtained using idx */
7173static void sdebug_erase_store(int idx, struct sdeb_store_info *sip)
7174{
7175 if (idx < 0)
7176 return;
7177 if (!sip) {
7178 if (xa_empty(per_store_ap))
7179 return;
7180 sip = xa_load(per_store_ap, idx);
7181 if (!sip)
7182 return;
7183 }
7184 vfree(sip->map_storep);
7185 vfree(sip->dif_storep);
7186 vfree(sip->storep);
7187 xa_erase(per_store_ap, idx);
7188 kfree(sip);
7189}
7190
7191/* Assume apart_from_first==false only in shutdown case. */
7192static void sdebug_erase_all_stores(bool apart_from_first)
7193{
7194 unsigned long idx;
7195 struct sdeb_store_info *sip = NULL;
7196
7197 xa_for_each(per_store_ap, idx, sip) {
7198 if (apart_from_first)
7199 apart_from_first = false;
7200 else
7201 sdebug_erase_store(idx, sip);
7202 }
7203 if (apart_from_first)
7204 sdeb_most_recent_idx = sdeb_first_idx;
7205}
7206
7207/*
7208 * Returns store xarray new element index (idx) if >=0 else negated errno.
7209 * Limit the number of stores to 65536.
7210 */
7211static int sdebug_add_store(void)
7212{
7213 int res;
7214 u32 n_idx;
7215 unsigned long iflags;
7216 unsigned long sz = (unsigned long)sdebug_dev_size_mb * 1048576;
7217 struct sdeb_store_info *sip = NULL;
7218 struct xa_limit xal = { .max = 1 << 16, .min = 0 };
7219
7220 sip = kzalloc(sizeof(*sip), GFP_KERNEL);
7221 if (!sip)
7222 return -ENOMEM;
7223
7224 xa_lock_irqsave(per_store_ap, iflags);
7225 res = __xa_alloc(per_store_ap, &n_idx, sip, xal, GFP_ATOMIC);
7226 if (unlikely(res < 0)) {
7227 xa_unlock_irqrestore(per_store_ap, iflags);
7228 kfree(sip);
7229 pr_warn("%s: xa_alloc() errno=%d\n", __func__, -res);
7230 return res;
7231 }
7232 sdeb_most_recent_idx = n_idx;
7233 if (sdeb_first_idx < 0)
7234 sdeb_first_idx = n_idx;
7235 xa_unlock_irqrestore(per_store_ap, iflags);
7236
7237 res = -ENOMEM;
7238 sip->storep = vzalloc(sz);
7239 if (!sip->storep) {
7240 pr_err("user data oom\n");
7241 goto err;
7242 }
7243 if (sdebug_num_parts > 0)
7244 sdebug_build_parts(sip->storep, sz);
7245
7246 /* DIF/DIX: what T10 calls Protection Information (PI) */
7247 if (sdebug_dix) {
7248 int dif_size;
7249
7250 dif_size = sdebug_store_sectors * sizeof(struct t10_pi_tuple);
7251 sip->dif_storep = vmalloc(dif_size);
7252
7253 pr_info("dif_storep %u bytes @ %pK\n", dif_size,
7254 sip->dif_storep);
7255
7256 if (!sip->dif_storep) {
7257 pr_err("DIX oom\n");
7258 goto err;
7259 }
7260 memset(sip->dif_storep, 0xff, dif_size);
7261 }
7262 /* Logical Block Provisioning */
7263 if (scsi_debug_lbp()) {
7264 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
7265 sip->map_storep = vmalloc(array_size(sizeof(long),
7266 BITS_TO_LONGS(map_size)));
7267
7268 pr_info("%lu provisioning blocks\n", map_size);
7269
7270 if (!sip->map_storep) {
7271 pr_err("LBP map oom\n");
7272 goto err;
7273 }
7274
7275 bitmap_zero(sip->map_storep, map_size);
7276
7277 /* Map first 1KB for partition table */
7278 if (sdebug_num_parts)
7279 map_region(sip, 0, 2);
7280 }
7281
7282 rwlock_init(&sip->macc_lck);
7283 return (int)n_idx;
7284err:
7285 sdebug_erase_store((int)n_idx, sip);
7286 pr_warn("%s: failed, errno=%d\n", __func__, -res);
7287 return res;
7288}
7289
7290static int sdebug_add_host_helper(int per_host_idx)
7291{
7292 int k, devs_per_host, idx;
7293 int error = -ENOMEM;
7294 struct sdebug_host_info *sdbg_host;
7295 struct sdebug_dev_info *sdbg_devinfo, *tmp;
7296
7297 sdbg_host = kzalloc(sizeof(*sdbg_host), GFP_KERNEL);
7298 if (!sdbg_host)
7299 return -ENOMEM;
7300 idx = (per_host_idx < 0) ? sdeb_first_idx : per_host_idx;
7301 if (xa_get_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE))
7302 xa_clear_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE);
7303 sdbg_host->si_idx = idx;
7304
7305 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
7306
7307 devs_per_host = sdebug_num_tgts * sdebug_max_luns;
7308 for (k = 0; k < devs_per_host; k++) {
7309 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
7310 if (!sdbg_devinfo)
7311 goto clean;
7312 }
7313
7314 spin_lock(&sdebug_host_list_lock);
7315 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
7316 spin_unlock(&sdebug_host_list_lock);
7317
7318 sdbg_host->dev.bus = &pseudo_lld_bus;
7319 sdbg_host->dev.parent = pseudo_primary;
7320 sdbg_host->dev.release = &sdebug_release_adapter;
7321 dev_set_name(&sdbg_host->dev, "adapter%d", sdebug_num_hosts);
7322
7323 error = device_register(&sdbg_host->dev);
7324 if (error) {
7325 spin_lock(&sdebug_host_list_lock);
7326 list_del(&sdbg_host->host_list);
7327 spin_unlock(&sdebug_host_list_lock);
7328 goto clean;
7329 }
7330
7331 ++sdebug_num_hosts;
7332 return 0;
7333
7334clean:
7335 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
7336 dev_list) {
7337 list_del(&sdbg_devinfo->dev_list);
7338 kfree(sdbg_devinfo->zstate);
7339 kfree(sdbg_devinfo);
7340 }
7341 if (sdbg_host->dev.release)
7342 put_device(&sdbg_host->dev);
7343 else
7344 kfree(sdbg_host);
7345 pr_warn("%s: failed, errno=%d\n", __func__, -error);
7346 return error;
7347}
7348
7349static int sdebug_do_add_host(bool mk_new_store)
7350{
7351 int ph_idx = sdeb_most_recent_idx;
7352
7353 if (mk_new_store) {
7354 ph_idx = sdebug_add_store();
7355 if (ph_idx < 0)
7356 return ph_idx;
7357 }
7358 return sdebug_add_host_helper(ph_idx);
7359}
7360
7361static void sdebug_do_remove_host(bool the_end)
7362{
7363 int idx = -1;
7364 struct sdebug_host_info *sdbg_host = NULL;
7365 struct sdebug_host_info *sdbg_host2;
7366
7367 spin_lock(&sdebug_host_list_lock);
7368 if (!list_empty(&sdebug_host_list)) {
7369 sdbg_host = list_entry(sdebug_host_list.prev,
7370 struct sdebug_host_info, host_list);
7371 idx = sdbg_host->si_idx;
7372 }
7373 if (!the_end && idx >= 0) {
7374 bool unique = true;
7375
7376 list_for_each_entry(sdbg_host2, &sdebug_host_list, host_list) {
7377 if (sdbg_host2 == sdbg_host)
7378 continue;
7379 if (idx == sdbg_host2->si_idx) {
7380 unique = false;
7381 break;
7382 }
7383 }
7384 if (unique) {
7385 xa_set_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE);
7386 if (idx == sdeb_most_recent_idx)
7387 --sdeb_most_recent_idx;
7388 }
7389 }
7390 if (sdbg_host)
7391 list_del(&sdbg_host->host_list);
7392 spin_unlock(&sdebug_host_list_lock);
7393
7394 if (!sdbg_host)
7395 return;
7396
7397 device_unregister(&sdbg_host->dev);
7398 --sdebug_num_hosts;
7399}
7400
7401static int sdebug_change_qdepth(struct scsi_device *sdev, int qdepth)
7402{
7403 int num_in_q = 0;
7404 struct sdebug_dev_info *devip;
7405
7406 block_unblock_all_queues(true);
7407 devip = (struct sdebug_dev_info *)sdev->hostdata;
7408 if (NULL == devip) {
7409 block_unblock_all_queues(false);
7410 return -ENODEV;
7411 }
7412 num_in_q = atomic_read(&devip->num_in_q);
7413
7414 if (qdepth > SDEBUG_CANQUEUE) {
7415 qdepth = SDEBUG_CANQUEUE;
7416 pr_warn("%s: requested qdepth [%d] exceeds canqueue [%d], trim\n", __func__,
7417 qdepth, SDEBUG_CANQUEUE);
7418 }
7419 if (qdepth < 1)
7420 qdepth = 1;
7421 if (qdepth != sdev->queue_depth)
7422 scsi_change_queue_depth(sdev, qdepth);
7423
7424 if (SDEBUG_OPT_Q_NOISE & sdebug_opts) {
7425 sdev_printk(KERN_INFO, sdev, "%s: qdepth=%d, num_in_q=%d\n",
7426 __func__, qdepth, num_in_q);
7427 }
7428 block_unblock_all_queues(false);
7429 return sdev->queue_depth;
7430}
7431
7432static bool fake_timeout(struct scsi_cmnd *scp)
7433{
7434 if (0 == (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth))) {
7435 if (sdebug_every_nth < -1)
7436 sdebug_every_nth = -1;
7437 if (SDEBUG_OPT_TIMEOUT & sdebug_opts)
7438 return true; /* ignore command causing timeout */
7439 else if (SDEBUG_OPT_MAC_TIMEOUT & sdebug_opts &&
7440 scsi_medium_access_command(scp))
7441 return true; /* time out reads and writes */
7442 }
7443 return false;
7444}
7445
7446/* Response to TUR or media access command when device stopped */
7447static int resp_not_ready(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
7448{
7449 int stopped_state;
7450 u64 diff_ns = 0;
7451 ktime_t now_ts = ktime_get_boottime();
7452 struct scsi_device *sdp = scp->device;
7453
7454 stopped_state = atomic_read(&devip->stopped);
7455 if (stopped_state == 2) {
7456 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) {
7457 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts));
7458 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) {
7459 /* tur_ms_to_ready timer extinguished */
7460 atomic_set(&devip->stopped, 0);
7461 return 0;
7462 }
7463 }
7464 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x1);
7465 if (sdebug_verbose)
7466 sdev_printk(KERN_INFO, sdp,
7467 "%s: Not ready: in process of becoming ready\n", my_name);
7468 if (scp->cmnd[0] == TEST_UNIT_READY) {
7469 u64 tur_nanosecs_to_ready = (u64)sdeb_tur_ms_to_ready * 1000000;
7470
7471 if (diff_ns <= tur_nanosecs_to_ready)
7472 diff_ns = tur_nanosecs_to_ready - diff_ns;
7473 else
7474 diff_ns = tur_nanosecs_to_ready;
7475 /* As per 20-061r2 approved for spc6 by T10 on 20200716 */
7476 do_div(diff_ns, 1000000); /* diff_ns becomes milliseconds */
7477 scsi_set_sense_information(scp->sense_buffer, SCSI_SENSE_BUFFERSIZE,
7478 diff_ns);
7479 return check_condition_result;
7480 }
7481 }
7482 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2);
7483 if (sdebug_verbose)
7484 sdev_printk(KERN_INFO, sdp, "%s: Not ready: initializing command required\n",
7485 my_name);
7486 return check_condition_result;
7487}
7488
7489static void sdebug_map_queues(struct Scsi_Host *shost)
7490{
7491 int i, qoff;
7492
7493 if (shost->nr_hw_queues == 1)
7494 return;
7495
7496 for (i = 0, qoff = 0; i < HCTX_MAX_TYPES; i++) {
7497 struct blk_mq_queue_map *map = &shost->tag_set.map[i];
7498
7499 map->nr_queues = 0;
7500
7501 if (i == HCTX_TYPE_DEFAULT)
7502 map->nr_queues = submit_queues - poll_queues;
7503 else if (i == HCTX_TYPE_POLL)
7504 map->nr_queues = poll_queues;
7505
7506 if (!map->nr_queues) {
7507 BUG_ON(i == HCTX_TYPE_DEFAULT);
7508 continue;
7509 }
7510
7511 map->queue_offset = qoff;
7512 blk_mq_map_queues(map);
7513
7514 qoff += map->nr_queues;
7515 }
7516}
7517
7518static int sdebug_blk_mq_poll(struct Scsi_Host *shost, unsigned int queue_num)
7519{
7520 bool first;
7521 bool retiring = false;
7522 int num_entries = 0;
7523 unsigned int qc_idx = 0;
7524 unsigned long iflags;
7525 ktime_t kt_from_boot = ktime_get_boottime();
7526 struct sdebug_queue *sqp;
7527 struct sdebug_queued_cmd *sqcp;
7528 struct scsi_cmnd *scp;
7529 struct sdebug_dev_info *devip;
7530 struct sdebug_defer *sd_dp;
7531
7532 sqp = sdebug_q_arr + queue_num;
7533
7534 spin_lock_irqsave(&sqp->qc_lock, iflags);
7535
7536 qc_idx = find_first_bit(sqp->in_use_bm, sdebug_max_queue);
7537 if (qc_idx >= sdebug_max_queue)
7538 goto unlock;
7539
7540 for (first = true; first || qc_idx + 1 < sdebug_max_queue; ) {
7541 if (first) {
7542 first = false;
7543 if (!test_bit(qc_idx, sqp->in_use_bm))
7544 continue;
7545 } else {
7546 qc_idx = find_next_bit(sqp->in_use_bm, sdebug_max_queue, qc_idx + 1);
7547 }
7548 if (qc_idx >= sdebug_max_queue)
7549 break;
7550
7551 sqcp = &sqp->qc_arr[qc_idx];
7552 sd_dp = sqcp->sd_dp;
7553 if (unlikely(!sd_dp))
7554 continue;
7555 scp = sqcp->a_cmnd;
7556 if (unlikely(scp == NULL)) {
7557 pr_err("scp is NULL, queue_num=%d, qc_idx=%u from %s\n",
7558 queue_num, qc_idx, __func__);
7559 break;
7560 }
7561 if (READ_ONCE(sd_dp->defer_t) == SDEB_DEFER_POLL) {
7562 if (kt_from_boot < sd_dp->cmpl_ts)
7563 continue;
7564
7565 } else /* ignoring non REQ_POLLED requests */
7566 continue;
7567 devip = (struct sdebug_dev_info *)scp->device->hostdata;
7568 if (likely(devip))
7569 atomic_dec(&devip->num_in_q);
7570 else
7571 pr_err("devip=NULL from %s\n", __func__);
7572 if (unlikely(atomic_read(&retired_max_queue) > 0))
7573 retiring = true;
7574
7575 sqcp->a_cmnd = NULL;
7576 if (unlikely(!test_and_clear_bit(qc_idx, sqp->in_use_bm))) {
7577 pr_err("Unexpected completion sqp %p queue_num=%d qc_idx=%u from %s\n",
7578 sqp, queue_num, qc_idx, __func__);
7579 break;
7580 }
7581 if (unlikely(retiring)) { /* user has reduced max_queue */
7582 int k, retval;
7583
7584 retval = atomic_read(&retired_max_queue);
7585 if (qc_idx >= retval) {
7586 pr_err("index %d too large\n", retval);
7587 break;
7588 }
7589 k = find_last_bit(sqp->in_use_bm, retval);
7590 if ((k < sdebug_max_queue) || (k == retval))
7591 atomic_set(&retired_max_queue, 0);
7592 else
7593 atomic_set(&retired_max_queue, k + 1);
7594 }
7595 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_NONE);
7596 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
7597 scsi_done(scp); /* callback to mid level */
7598 num_entries++;
7599 spin_lock_irqsave(&sqp->qc_lock, iflags);
7600 if (find_first_bit(sqp->in_use_bm, sdebug_max_queue) >= sdebug_max_queue)
7601 break;
7602 }
7603
7604unlock:
7605 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
7606
7607 if (num_entries > 0)
7608 atomic_add(num_entries, &sdeb_mq_poll_count);
7609 return num_entries;
7610}
7611
7612static int scsi_debug_queuecommand(struct Scsi_Host *shost,
7613 struct scsi_cmnd *scp)
7614{
7615 u8 sdeb_i;
7616 struct scsi_device *sdp = scp->device;
7617 const struct opcode_info_t *oip;
7618 const struct opcode_info_t *r_oip;
7619 struct sdebug_dev_info *devip;
7620 u8 *cmd = scp->cmnd;
7621 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
7622 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *) = NULL;
7623 int k, na;
7624 int errsts = 0;
7625 u64 lun_index = sdp->lun & 0x3FFF;
7626 u32 flags;
7627 u16 sa;
7628 u8 opcode = cmd[0];
7629 bool has_wlun_rl;
7630 bool inject_now;
7631
7632 scsi_set_resid(scp, 0);
7633 if (sdebug_statistics) {
7634 atomic_inc(&sdebug_cmnd_count);
7635 inject_now = inject_on_this_cmd();
7636 } else {
7637 inject_now = false;
7638 }
7639 if (unlikely(sdebug_verbose &&
7640 !(SDEBUG_OPT_NO_CDB_NOISE & sdebug_opts))) {
7641 char b[120];
7642 int n, len, sb;
7643
7644 len = scp->cmd_len;
7645 sb = (int)sizeof(b);
7646 if (len > 32)
7647 strcpy(b, "too long, over 32 bytes");
7648 else {
7649 for (k = 0, n = 0; k < len && n < sb; ++k)
7650 n += scnprintf(b + n, sb - n, "%02x ",
7651 (u32)cmd[k]);
7652 }
7653 sdev_printk(KERN_INFO, sdp, "%s: tag=%#x, cmd %s\n", my_name,
7654 blk_mq_unique_tag(scsi_cmd_to_rq(scp)), b);
7655 }
7656 if (unlikely(inject_now && (sdebug_opts & SDEBUG_OPT_HOST_BUSY)))
7657 return SCSI_MLQUEUE_HOST_BUSY;
7658 has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS);
7659 if (unlikely(lun_index >= sdebug_max_luns && !has_wlun_rl))
7660 goto err_out;
7661
7662 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */
7663 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */
7664 devip = (struct sdebug_dev_info *)sdp->hostdata;
7665 if (unlikely(!devip)) {
7666 devip = find_build_dev_info(sdp);
7667 if (NULL == devip)
7668 goto err_out;
7669 }
7670 if (unlikely(inject_now && !atomic_read(&sdeb_inject_pending)))
7671 atomic_set(&sdeb_inject_pending, 1);
7672
7673 na = oip->num_attached;
7674 r_pfp = oip->pfp;
7675 if (na) { /* multiple commands with this opcode */
7676 r_oip = oip;
7677 if (FF_SA & r_oip->flags) {
7678 if (F_SA_LOW & oip->flags)
7679 sa = 0x1f & cmd[1];
7680 else
7681 sa = get_unaligned_be16(cmd + 8);
7682 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
7683 if (opcode == oip->opcode && sa == oip->sa)
7684 break;
7685 }
7686 } else { /* since no service action only check opcode */
7687 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
7688 if (opcode == oip->opcode)
7689 break;
7690 }
7691 }
7692 if (k > na) {
7693 if (F_SA_LOW & r_oip->flags)
7694 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4);
7695 else if (F_SA_HIGH & r_oip->flags)
7696 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7);
7697 else
7698 mk_sense_invalid_opcode(scp);
7699 goto check_cond;
7700 }
7701 } /* else (when na==0) we assume the oip is a match */
7702 flags = oip->flags;
7703 if (unlikely(F_INV_OP & flags)) {
7704 mk_sense_invalid_opcode(scp);
7705 goto check_cond;
7706 }
7707 if (unlikely(has_wlun_rl && !(F_RL_WLUN_OK & flags))) {
7708 if (sdebug_verbose)
7709 sdev_printk(KERN_INFO, sdp, "%s: Opcode 0x%x not%s\n",
7710 my_name, opcode, " supported for wlun");
7711 mk_sense_invalid_opcode(scp);
7712 goto check_cond;
7713 }
7714 if (unlikely(sdebug_strict)) { /* check cdb against mask */
7715 u8 rem;
7716 int j;
7717
7718 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) {
7719 rem = ~oip->len_mask[k] & cmd[k];
7720 if (rem) {
7721 for (j = 7; j >= 0; --j, rem <<= 1) {
7722 if (0x80 & rem)
7723 break;
7724 }
7725 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j);
7726 goto check_cond;
7727 }
7728 }
7729 }
7730 if (unlikely(!(F_SKIP_UA & flags) &&
7731 find_first_bit(devip->uas_bm,
7732 SDEBUG_NUM_UAS) != SDEBUG_NUM_UAS)) {
7733 errsts = make_ua(scp, devip);
7734 if (errsts)
7735 goto check_cond;
7736 }
7737 if (unlikely(((F_M_ACCESS & flags) || scp->cmnd[0] == TEST_UNIT_READY) &&
7738 atomic_read(&devip->stopped))) {
7739 errsts = resp_not_ready(scp, devip);
7740 if (errsts)
7741 goto fini;
7742 }
7743 if (sdebug_fake_rw && (F_FAKE_RW & flags))
7744 goto fini;
7745 if (unlikely(sdebug_every_nth)) {
7746 if (fake_timeout(scp))
7747 return 0; /* ignore command: make trouble */
7748 }
7749 if (likely(oip->pfp))
7750 pfp = oip->pfp; /* calls a resp_* function */
7751 else
7752 pfp = r_pfp; /* if leaf function ptr NULL, try the root's */
7753
7754fini:
7755 if (F_DELAY_OVERR & flags) /* cmds like INQUIRY respond asap */
7756 return schedule_resp(scp, devip, errsts, pfp, 0, 0);
7757 else if ((flags & F_LONG_DELAY) && (sdebug_jdelay > 0 ||
7758 sdebug_ndelay > 10000)) {
7759 /*
7760 * Skip long delays if ndelay <= 10 microseconds. Otherwise
7761 * for Start Stop Unit (SSU) want at least 1 second delay and
7762 * if sdebug_jdelay>1 want a long delay of that many seconds.
7763 * For Synchronize Cache want 1/20 of SSU's delay.
7764 */
7765 int jdelay = (sdebug_jdelay < 2) ? 1 : sdebug_jdelay;
7766 int denom = (flags & F_SYNC_DELAY) ? 20 : 1;
7767
7768 jdelay = mult_frac(USER_HZ * jdelay, HZ, denom * USER_HZ);
7769 return schedule_resp(scp, devip, errsts, pfp, jdelay, 0);
7770 } else
7771 return schedule_resp(scp, devip, errsts, pfp, sdebug_jdelay,
7772 sdebug_ndelay);
7773check_cond:
7774 return schedule_resp(scp, devip, check_condition_result, NULL, 0, 0);
7775err_out:
7776 return schedule_resp(scp, NULL, DID_NO_CONNECT << 16, NULL, 0, 0);
7777}
7778
7779static struct scsi_host_template sdebug_driver_template = {
7780 .show_info = scsi_debug_show_info,
7781 .write_info = scsi_debug_write_info,
7782 .proc_name = sdebug_proc_name,
7783 .name = "SCSI DEBUG",
7784 .info = scsi_debug_info,
7785 .slave_alloc = scsi_debug_slave_alloc,
7786 .slave_configure = scsi_debug_slave_configure,
7787 .slave_destroy = scsi_debug_slave_destroy,
7788 .ioctl = scsi_debug_ioctl,
7789 .queuecommand = scsi_debug_queuecommand,
7790 .change_queue_depth = sdebug_change_qdepth,
7791 .map_queues = sdebug_map_queues,
7792 .mq_poll = sdebug_blk_mq_poll,
7793 .eh_abort_handler = scsi_debug_abort,
7794 .eh_device_reset_handler = scsi_debug_device_reset,
7795 .eh_target_reset_handler = scsi_debug_target_reset,
7796 .eh_bus_reset_handler = scsi_debug_bus_reset,
7797 .eh_host_reset_handler = scsi_debug_host_reset,
7798 .can_queue = SDEBUG_CANQUEUE,
7799 .this_id = 7,
7800 .sg_tablesize = SG_MAX_SEGMENTS,
7801 .cmd_per_lun = DEF_CMD_PER_LUN,
7802 .max_sectors = -1U,
7803 .max_segment_size = -1U,
7804 .module = THIS_MODULE,
7805 .track_queue_depth = 1,
7806};
7807
7808static int sdebug_driver_probe(struct device *dev)
7809{
7810 int error = 0;
7811 struct sdebug_host_info *sdbg_host;
7812 struct Scsi_Host *hpnt;
7813 int hprot;
7814
7815 sdbg_host = to_sdebug_host(dev);
7816
7817 sdebug_driver_template.can_queue = sdebug_max_queue;
7818 sdebug_driver_template.cmd_per_lun = sdebug_max_queue;
7819 if (!sdebug_clustering)
7820 sdebug_driver_template.dma_boundary = PAGE_SIZE - 1;
7821
7822 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
7823 if (NULL == hpnt) {
7824 pr_err("scsi_host_alloc failed\n");
7825 error = -ENODEV;
7826 return error;
7827 }
7828 if (submit_queues > nr_cpu_ids) {
7829 pr_warn("%s: trim submit_queues (was %d) to nr_cpu_ids=%u\n",
7830 my_name, submit_queues, nr_cpu_ids);
7831 submit_queues = nr_cpu_ids;
7832 }
7833 /*
7834 * Decide whether to tell scsi subsystem that we want mq. The
7835 * following should give the same answer for each host.
7836 */
7837 hpnt->nr_hw_queues = submit_queues;
7838 if (sdebug_host_max_queue)
7839 hpnt->host_tagset = 1;
7840
7841 /* poll queues are possible for nr_hw_queues > 1 */
7842 if (hpnt->nr_hw_queues == 1 || (poll_queues < 1)) {
7843 pr_warn("%s: trim poll_queues to 0. poll_q/nr_hw = (%d/%d)\n",
7844 my_name, poll_queues, hpnt->nr_hw_queues);
7845 poll_queues = 0;
7846 }
7847
7848 /*
7849 * Poll queues don't need interrupts, but we need at least one I/O queue
7850 * left over for non-polled I/O.
7851 * If condition not met, trim poll_queues to 1 (just for simplicity).
7852 */
7853 if (poll_queues >= submit_queues) {
7854 if (submit_queues < 3)
7855 pr_warn("%s: trim poll_queues to 1\n", my_name);
7856 else
7857 pr_warn("%s: trim poll_queues to 1. Perhaps try poll_queues=%d\n",
7858 my_name, submit_queues - 1);
7859 poll_queues = 1;
7860 }
7861 if (poll_queues)
7862 hpnt->nr_maps = 3;
7863
7864 sdbg_host->shost = hpnt;
7865 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
7866 if ((hpnt->this_id >= 0) && (sdebug_num_tgts > hpnt->this_id))
7867 hpnt->max_id = sdebug_num_tgts + 1;
7868 else
7869 hpnt->max_id = sdebug_num_tgts;
7870 /* = sdebug_max_luns; */
7871 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
7872
7873 hprot = 0;
7874
7875 switch (sdebug_dif) {
7876
7877 case T10_PI_TYPE1_PROTECTION:
7878 hprot = SHOST_DIF_TYPE1_PROTECTION;
7879 if (sdebug_dix)
7880 hprot |= SHOST_DIX_TYPE1_PROTECTION;
7881 break;
7882
7883 case T10_PI_TYPE2_PROTECTION:
7884 hprot = SHOST_DIF_TYPE2_PROTECTION;
7885 if (sdebug_dix)
7886 hprot |= SHOST_DIX_TYPE2_PROTECTION;
7887 break;
7888
7889 case T10_PI_TYPE3_PROTECTION:
7890 hprot = SHOST_DIF_TYPE3_PROTECTION;
7891 if (sdebug_dix)
7892 hprot |= SHOST_DIX_TYPE3_PROTECTION;
7893 break;
7894
7895 default:
7896 if (sdebug_dix)
7897 hprot |= SHOST_DIX_TYPE0_PROTECTION;
7898 break;
7899 }
7900
7901 scsi_host_set_prot(hpnt, hprot);
7902
7903 if (have_dif_prot || sdebug_dix)
7904 pr_info("host protection%s%s%s%s%s%s%s\n",
7905 (hprot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
7906 (hprot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
7907 (hprot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
7908 (hprot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
7909 (hprot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
7910 (hprot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
7911 (hprot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
7912
7913 if (sdebug_guard == 1)
7914 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
7915 else
7916 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
7917
7918 sdebug_verbose = !!(SDEBUG_OPT_NOISE & sdebug_opts);
7919 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & sdebug_opts);
7920 if (sdebug_every_nth) /* need stats counters for every_nth */
7921 sdebug_statistics = true;
7922 error = scsi_add_host(hpnt, &sdbg_host->dev);
7923 if (error) {
7924 pr_err("scsi_add_host failed\n");
7925 error = -ENODEV;
7926 scsi_host_put(hpnt);
7927 } else {
7928 scsi_scan_host(hpnt);
7929 }
7930
7931 return error;
7932}
7933
7934static void sdebug_driver_remove(struct device *dev)
7935{
7936 struct sdebug_host_info *sdbg_host;
7937 struct sdebug_dev_info *sdbg_devinfo, *tmp;
7938
7939 sdbg_host = to_sdebug_host(dev);
7940
7941 scsi_remove_host(sdbg_host->shost);
7942
7943 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
7944 dev_list) {
7945 list_del(&sdbg_devinfo->dev_list);
7946 kfree(sdbg_devinfo->zstate);
7947 kfree(sdbg_devinfo);
7948 }
7949
7950 scsi_host_put(sdbg_host->shost);
7951}
7952
7953static int pseudo_lld_bus_match(struct device *dev,
7954 struct device_driver *dev_driver)
7955{
7956 return 1;
7957}
7958
7959static struct bus_type pseudo_lld_bus = {
7960 .name = "pseudo",
7961 .match = pseudo_lld_bus_match,
7962 .probe = sdebug_driver_probe,
7963 .remove = sdebug_driver_remove,
7964 .drv_groups = sdebug_drv_groups,
7965};