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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_LBPRZ 1
105#define DEF_LOWEST_ALIGNED 0
106#define DEF_NO_LUN_0 0
107#define DEF_NUM_PARTS 0
108#define DEF_OPTS 0
109#define DEF_OPT_BLKS 64
110#define DEF_PHYSBLK_EXP 0
111#define DEF_PTYPE 0
112#define DEF_SCSI_LEVEL 5 /* INQUIRY, byte2 [5->SPC-3] */
113#define DEF_SECTOR_SIZE 512
114#define DEF_UNMAP_ALIGNMENT 0
115#define DEF_UNMAP_GRANULARITY 1
116#define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
117#define DEF_UNMAP_MAX_DESC 256
118#define DEF_VIRTUAL_GB 0
119#define DEF_VPD_USE_HOSTNO 1
120#define DEF_WRITESAME_LENGTH 0xFFFF
121
122/* bit mask values for scsi_debug_opts */
123#define SCSI_DEBUG_OPT_NOISE 1
124#define SCSI_DEBUG_OPT_MEDIUM_ERR 2
125#define SCSI_DEBUG_OPT_TIMEOUT 4
126#define SCSI_DEBUG_OPT_RECOVERED_ERR 8
127#define SCSI_DEBUG_OPT_TRANSPORT_ERR 16
128#define SCSI_DEBUG_OPT_DIF_ERR 32
129#define SCSI_DEBUG_OPT_DIX_ERR 64
130#define SCSI_DEBUG_OPT_MAC_TIMEOUT 128
131/* When "every_nth" > 0 then modulo "every_nth" commands:
132 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
133 * - a RECOVERED_ERROR is simulated on successful read and write
134 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
135 * - a TRANSPORT_ERROR is simulated on successful read and write
136 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
137 *
138 * When "every_nth" < 0 then after "- every_nth" commands:
139 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
140 * - a RECOVERED_ERROR is simulated on successful read and write
141 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
142 * - a TRANSPORT_ERROR is simulated on successful read and write
143 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
144 * This will continue until some other action occurs (e.g. the user
145 * writing a new value (other than -1 or 1) to every_nth via sysfs).
146 */
147
148/* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
149 * sector on read commands: */
150#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
151#define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
152
153/* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
154 * or "peripheral device" addressing (value 0) */
155#define SAM2_LUN_ADDRESS_METHOD 0
156#define SAM2_WLUN_REPORT_LUNS 0xc101
157
158/* Can queue up to this number of commands. Typically commands that
159 * that have a non-zero delay are queued. */
160#define SCSI_DEBUG_CANQUEUE 255
161
162static int scsi_debug_add_host = DEF_NUM_HOST;
163static int scsi_debug_ato = DEF_ATO;
164static int scsi_debug_delay = DEF_DELAY;
165static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB;
166static int scsi_debug_dif = DEF_DIF;
167static int scsi_debug_dix = DEF_DIX;
168static int scsi_debug_dsense = DEF_D_SENSE;
169static int scsi_debug_every_nth = DEF_EVERY_NTH;
170static int scsi_debug_fake_rw = DEF_FAKE_RW;
171static int scsi_debug_guard = DEF_GUARD;
172static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED;
173static int scsi_debug_max_luns = DEF_MAX_LUNS;
174static int scsi_debug_max_queue = SCSI_DEBUG_CANQUEUE;
175static int scsi_debug_no_lun_0 = DEF_NO_LUN_0;
176static int scsi_debug_no_uld = 0;
177static int scsi_debug_num_parts = DEF_NUM_PARTS;
178static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */
179static int scsi_debug_opt_blks = DEF_OPT_BLKS;
180static int scsi_debug_opts = DEF_OPTS;
181static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP;
182static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */
183static int scsi_debug_scsi_level = DEF_SCSI_LEVEL;
184static int scsi_debug_sector_size = DEF_SECTOR_SIZE;
185static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB;
186static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
187static unsigned int scsi_debug_lbpu = DEF_LBPU;
188static unsigned int scsi_debug_lbpws = DEF_LBPWS;
189static unsigned int scsi_debug_lbpws10 = DEF_LBPWS10;
190static unsigned int scsi_debug_lbprz = DEF_LBPRZ;
191static unsigned int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
192static unsigned int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY;
193static unsigned int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
194static unsigned int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
195static unsigned int scsi_debug_write_same_length = DEF_WRITESAME_LENGTH;
196
197static int scsi_debug_cmnd_count = 0;
198
199#define DEV_READONLY(TGT) (0)
200#define DEV_REMOVEABLE(TGT) (0)
201
202static unsigned int sdebug_store_sectors;
203static sector_t sdebug_capacity; /* in sectors */
204
205/* old BIOS stuff, kernel may get rid of them but some mode sense pages
206 may still need them */
207static int sdebug_heads; /* heads per disk */
208static int sdebug_cylinders_per; /* cylinders per surface */
209static int sdebug_sectors_per; /* sectors per cylinder */
210
211#define SDEBUG_MAX_PARTS 4
212
213#define SDEBUG_SENSE_LEN 32
214
215#define SCSI_DEBUG_MAX_CMD_LEN 32
216
217static unsigned int scsi_debug_lbp(void)
218{
219 return scsi_debug_lbpu | scsi_debug_lbpws | scsi_debug_lbpws10;
220}
221
222struct sdebug_dev_info {
223 struct list_head dev_list;
224 unsigned char sense_buff[SDEBUG_SENSE_LEN]; /* weak nexus */
225 unsigned int channel;
226 unsigned int target;
227 unsigned int lun;
228 struct sdebug_host_info *sdbg_host;
229 unsigned int wlun;
230 char reset;
231 char stopped;
232 char used;
233};
234
235struct sdebug_host_info {
236 struct list_head host_list;
237 struct Scsi_Host *shost;
238 struct device dev;
239 struct list_head dev_info_list;
240};
241
242#define to_sdebug_host(d) \
243 container_of(d, struct sdebug_host_info, dev)
244
245static LIST_HEAD(sdebug_host_list);
246static DEFINE_SPINLOCK(sdebug_host_list_lock);
247
248typedef void (* done_funct_t) (struct scsi_cmnd *);
249
250struct sdebug_queued_cmd {
251 int in_use;
252 struct timer_list cmnd_timer;
253 done_funct_t done_funct;
254 struct scsi_cmnd * a_cmnd;
255 int scsi_result;
256};
257static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
258
259static unsigned char * fake_storep; /* ramdisk storage */
260static unsigned char *dif_storep; /* protection info */
261static void *map_storep; /* provisioning map */
262
263static unsigned long map_size;
264static int num_aborts = 0;
265static int num_dev_resets = 0;
266static int num_bus_resets = 0;
267static int num_host_resets = 0;
268static int dix_writes;
269static int dix_reads;
270static int dif_errors;
271
272static DEFINE_SPINLOCK(queued_arr_lock);
273static DEFINE_RWLOCK(atomic_rw);
274
275static char sdebug_proc_name[] = "scsi_debug";
276
277static struct bus_type pseudo_lld_bus;
278
279static inline sector_t dif_offset(sector_t sector)
280{
281 return sector << 3;
282}
283
284static struct device_driver sdebug_driverfs_driver = {
285 .name = sdebug_proc_name,
286 .bus = &pseudo_lld_bus,
287};
288
289static const int check_condition_result =
290 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
291
292static const int illegal_condition_result =
293 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
294
295static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
296 0, 0, 0x2, 0x4b};
297static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
298 0, 0, 0x0, 0x0};
299
300static int sdebug_add_adapter(void);
301static void sdebug_remove_adapter(void);
302
303static void sdebug_max_tgts_luns(void)
304{
305 struct sdebug_host_info *sdbg_host;
306 struct Scsi_Host *hpnt;
307
308 spin_lock(&sdebug_host_list_lock);
309 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
310 hpnt = sdbg_host->shost;
311 if ((hpnt->this_id >= 0) &&
312 (scsi_debug_num_tgts > hpnt->this_id))
313 hpnt->max_id = scsi_debug_num_tgts + 1;
314 else
315 hpnt->max_id = scsi_debug_num_tgts;
316 /* scsi_debug_max_luns; */
317 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS;
318 }
319 spin_unlock(&sdebug_host_list_lock);
320}
321
322static void mk_sense_buffer(struct sdebug_dev_info *devip, int key,
323 int asc, int asq)
324{
325 unsigned char *sbuff;
326
327 sbuff = devip->sense_buff;
328 memset(sbuff, 0, SDEBUG_SENSE_LEN);
329
330 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, key, asc, asq);
331
332 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
333 printk(KERN_INFO "scsi_debug: [sense_key,asc,ascq]: "
334 "[0x%x,0x%x,0x%x]\n", key, asc, asq);
335}
336
337static void get_data_transfer_info(unsigned char *cmd,
338 unsigned long long *lba, unsigned int *num,
339 u32 *ei_lba)
340{
341 *ei_lba = 0;
342
343 switch (*cmd) {
344 case VARIABLE_LENGTH_CMD:
345 *lba = (u64)cmd[19] | (u64)cmd[18] << 8 |
346 (u64)cmd[17] << 16 | (u64)cmd[16] << 24 |
347 (u64)cmd[15] << 32 | (u64)cmd[14] << 40 |
348 (u64)cmd[13] << 48 | (u64)cmd[12] << 56;
349
350 *ei_lba = (u32)cmd[23] | (u32)cmd[22] << 8 |
351 (u32)cmd[21] << 16 | (u32)cmd[20] << 24;
352
353 *num = (u32)cmd[31] | (u32)cmd[30] << 8 | (u32)cmd[29] << 16 |
354 (u32)cmd[28] << 24;
355 break;
356
357 case WRITE_SAME_16:
358 case WRITE_16:
359 case READ_16:
360 *lba = (u64)cmd[9] | (u64)cmd[8] << 8 |
361 (u64)cmd[7] << 16 | (u64)cmd[6] << 24 |
362 (u64)cmd[5] << 32 | (u64)cmd[4] << 40 |
363 (u64)cmd[3] << 48 | (u64)cmd[2] << 56;
364
365 *num = (u32)cmd[13] | (u32)cmd[12] << 8 | (u32)cmd[11] << 16 |
366 (u32)cmd[10] << 24;
367 break;
368 case WRITE_12:
369 case READ_12:
370 *lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 |
371 (u32)cmd[2] << 24;
372
373 *num = (u32)cmd[9] | (u32)cmd[8] << 8 | (u32)cmd[7] << 16 |
374 (u32)cmd[6] << 24;
375 break;
376 case WRITE_SAME:
377 case WRITE_10:
378 case READ_10:
379 case XDWRITEREAD_10:
380 *lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 |
381 (u32)cmd[2] << 24;
382
383 *num = (u32)cmd[8] | (u32)cmd[7] << 8;
384 break;
385 case WRITE_6:
386 case READ_6:
387 *lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
388 (u32)(cmd[1] & 0x1f) << 16;
389 *num = (0 == cmd[4]) ? 256 : cmd[4];
390 break;
391 default:
392 break;
393 }
394}
395
396static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
397{
398 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
399 printk(KERN_INFO "scsi_debug: ioctl: cmd=0x%x\n", cmd);
400 }
401 return -EINVAL;
402 /* return -ENOTTY; // correct return but upsets fdisk */
403}
404
405static int check_readiness(struct scsi_cmnd * SCpnt, int reset_only,
406 struct sdebug_dev_info * devip)
407{
408 if (devip->reset) {
409 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
410 printk(KERN_INFO "scsi_debug: Reporting Unit "
411 "attention: power on reset\n");
412 devip->reset = 0;
413 mk_sense_buffer(devip, UNIT_ATTENTION, POWERON_RESET, 0);
414 return check_condition_result;
415 }
416 if ((0 == reset_only) && devip->stopped) {
417 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
418 printk(KERN_INFO "scsi_debug: Reporting Not "
419 "ready: initializing command required\n");
420 mk_sense_buffer(devip, NOT_READY, LOGICAL_UNIT_NOT_READY,
421 0x2);
422 return check_condition_result;
423 }
424 return 0;
425}
426
427/* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */
428static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
429 int arr_len)
430{
431 int act_len;
432 struct scsi_data_buffer *sdb = scsi_in(scp);
433
434 if (!sdb->length)
435 return 0;
436 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
437 return (DID_ERROR << 16);
438
439 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
440 arr, arr_len);
441 if (sdb->resid)
442 sdb->resid -= act_len;
443 else
444 sdb->resid = scsi_bufflen(scp) - act_len;
445
446 return 0;
447}
448
449/* Returns number of bytes fetched into 'arr' or -1 if error. */
450static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
451 int arr_len)
452{
453 if (!scsi_bufflen(scp))
454 return 0;
455 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE))
456 return -1;
457
458 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
459}
460
461
462static const char * inq_vendor_id = "Linux ";
463static const char * inq_product_id = "scsi_debug ";
464static const char * inq_product_rev = "0004";
465
466static int inquiry_evpd_83(unsigned char * arr, int port_group_id,
467 int target_dev_id, int dev_id_num,
468 const char * dev_id_str,
469 int dev_id_str_len)
470{
471 int num, port_a;
472 char b[32];
473
474 port_a = target_dev_id + 1;
475 /* T10 vendor identifier field format (faked) */
476 arr[0] = 0x2; /* ASCII */
477 arr[1] = 0x1;
478 arr[2] = 0x0;
479 memcpy(&arr[4], inq_vendor_id, 8);
480 memcpy(&arr[12], inq_product_id, 16);
481 memcpy(&arr[28], dev_id_str, dev_id_str_len);
482 num = 8 + 16 + dev_id_str_len;
483 arr[3] = num;
484 num += 4;
485 if (dev_id_num >= 0) {
486 /* NAA-5, Logical unit identifier (binary) */
487 arr[num++] = 0x1; /* binary (not necessarily sas) */
488 arr[num++] = 0x3; /* PIV=0, lu, naa */
489 arr[num++] = 0x0;
490 arr[num++] = 0x8;
491 arr[num++] = 0x53; /* naa-5 ieee company id=0x333333 (fake) */
492 arr[num++] = 0x33;
493 arr[num++] = 0x33;
494 arr[num++] = 0x30;
495 arr[num++] = (dev_id_num >> 24);
496 arr[num++] = (dev_id_num >> 16) & 0xff;
497 arr[num++] = (dev_id_num >> 8) & 0xff;
498 arr[num++] = dev_id_num & 0xff;
499 /* Target relative port number */
500 arr[num++] = 0x61; /* proto=sas, binary */
501 arr[num++] = 0x94; /* PIV=1, target port, rel port */
502 arr[num++] = 0x0; /* reserved */
503 arr[num++] = 0x4; /* length */
504 arr[num++] = 0x0; /* reserved */
505 arr[num++] = 0x0; /* reserved */
506 arr[num++] = 0x0;
507 arr[num++] = 0x1; /* relative port A */
508 }
509 /* NAA-5, Target port identifier */
510 arr[num++] = 0x61; /* proto=sas, binary */
511 arr[num++] = 0x93; /* piv=1, target port, naa */
512 arr[num++] = 0x0;
513 arr[num++] = 0x8;
514 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
515 arr[num++] = 0x22;
516 arr[num++] = 0x22;
517 arr[num++] = 0x20;
518 arr[num++] = (port_a >> 24);
519 arr[num++] = (port_a >> 16) & 0xff;
520 arr[num++] = (port_a >> 8) & 0xff;
521 arr[num++] = port_a & 0xff;
522 /* NAA-5, Target port group identifier */
523 arr[num++] = 0x61; /* proto=sas, binary */
524 arr[num++] = 0x95; /* piv=1, target port group id */
525 arr[num++] = 0x0;
526 arr[num++] = 0x4;
527 arr[num++] = 0;
528 arr[num++] = 0;
529 arr[num++] = (port_group_id >> 8) & 0xff;
530 arr[num++] = port_group_id & 0xff;
531 /* NAA-5, Target device identifier */
532 arr[num++] = 0x61; /* proto=sas, binary */
533 arr[num++] = 0xa3; /* piv=1, target device, naa */
534 arr[num++] = 0x0;
535 arr[num++] = 0x8;
536 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
537 arr[num++] = 0x22;
538 arr[num++] = 0x22;
539 arr[num++] = 0x20;
540 arr[num++] = (target_dev_id >> 24);
541 arr[num++] = (target_dev_id >> 16) & 0xff;
542 arr[num++] = (target_dev_id >> 8) & 0xff;
543 arr[num++] = target_dev_id & 0xff;
544 /* SCSI name string: Target device identifier */
545 arr[num++] = 0x63; /* proto=sas, UTF-8 */
546 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
547 arr[num++] = 0x0;
548 arr[num++] = 24;
549 memcpy(arr + num, "naa.52222220", 12);
550 num += 12;
551 snprintf(b, sizeof(b), "%08X", target_dev_id);
552 memcpy(arr + num, b, 8);
553 num += 8;
554 memset(arr + num, 0, 4);
555 num += 4;
556 return num;
557}
558
559
560static unsigned char vpd84_data[] = {
561/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
562 0x22,0x22,0x22,0x0,0xbb,0x1,
563 0x22,0x22,0x22,0x0,0xbb,0x2,
564};
565
566static int inquiry_evpd_84(unsigned char * arr)
567{
568 memcpy(arr, vpd84_data, sizeof(vpd84_data));
569 return sizeof(vpd84_data);
570}
571
572static int inquiry_evpd_85(unsigned char * arr)
573{
574 int num = 0;
575 const char * na1 = "https://www.kernel.org/config";
576 const char * na2 = "http://www.kernel.org/log";
577 int plen, olen;
578
579 arr[num++] = 0x1; /* lu, storage config */
580 arr[num++] = 0x0; /* reserved */
581 arr[num++] = 0x0;
582 olen = strlen(na1);
583 plen = olen + 1;
584 if (plen % 4)
585 plen = ((plen / 4) + 1) * 4;
586 arr[num++] = plen; /* length, null termianted, padded */
587 memcpy(arr + num, na1, olen);
588 memset(arr + num + olen, 0, plen - olen);
589 num += plen;
590
591 arr[num++] = 0x4; /* lu, logging */
592 arr[num++] = 0x0; /* reserved */
593 arr[num++] = 0x0;
594 olen = strlen(na2);
595 plen = olen + 1;
596 if (plen % 4)
597 plen = ((plen / 4) + 1) * 4;
598 arr[num++] = plen; /* length, null terminated, padded */
599 memcpy(arr + num, na2, olen);
600 memset(arr + num + olen, 0, plen - olen);
601 num += plen;
602
603 return num;
604}
605
606/* SCSI ports VPD page */
607static int inquiry_evpd_88(unsigned char * arr, int target_dev_id)
608{
609 int num = 0;
610 int port_a, port_b;
611
612 port_a = target_dev_id + 1;
613 port_b = port_a + 1;
614 arr[num++] = 0x0; /* reserved */
615 arr[num++] = 0x0; /* reserved */
616 arr[num++] = 0x0;
617 arr[num++] = 0x1; /* relative port 1 (primary) */
618 memset(arr + num, 0, 6);
619 num += 6;
620 arr[num++] = 0x0;
621 arr[num++] = 12; /* length tp descriptor */
622 /* naa-5 target port identifier (A) */
623 arr[num++] = 0x61; /* proto=sas, binary */
624 arr[num++] = 0x93; /* PIV=1, target port, NAA */
625 arr[num++] = 0x0; /* reserved */
626 arr[num++] = 0x8; /* length */
627 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
628 arr[num++] = 0x22;
629 arr[num++] = 0x22;
630 arr[num++] = 0x20;
631 arr[num++] = (port_a >> 24);
632 arr[num++] = (port_a >> 16) & 0xff;
633 arr[num++] = (port_a >> 8) & 0xff;
634 arr[num++] = port_a & 0xff;
635
636 arr[num++] = 0x0; /* reserved */
637 arr[num++] = 0x0; /* reserved */
638 arr[num++] = 0x0;
639 arr[num++] = 0x2; /* relative port 2 (secondary) */
640 memset(arr + num, 0, 6);
641 num += 6;
642 arr[num++] = 0x0;
643 arr[num++] = 12; /* length tp descriptor */
644 /* naa-5 target port identifier (B) */
645 arr[num++] = 0x61; /* proto=sas, binary */
646 arr[num++] = 0x93; /* PIV=1, target port, NAA */
647 arr[num++] = 0x0; /* reserved */
648 arr[num++] = 0x8; /* length */
649 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
650 arr[num++] = 0x22;
651 arr[num++] = 0x22;
652 arr[num++] = 0x20;
653 arr[num++] = (port_b >> 24);
654 arr[num++] = (port_b >> 16) & 0xff;
655 arr[num++] = (port_b >> 8) & 0xff;
656 arr[num++] = port_b & 0xff;
657
658 return num;
659}
660
661
662static unsigned char vpd89_data[] = {
663/* from 4th byte */ 0,0,0,0,
664'l','i','n','u','x',' ',' ',' ',
665'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
666'1','2','3','4',
6670x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
6680xec,0,0,0,
6690x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
6700,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
6710x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
6720x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
6730x53,0x41,
6740x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
6750x20,0x20,
6760x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
6770x10,0x80,
6780,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
6790x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
6800x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
6810,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
6820x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
6830x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
6840,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
6850,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6860,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6870,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6880x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
6890,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
6900xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
6910,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,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,
7000,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
7010,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
7020,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
7030,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
704};
705
706static int inquiry_evpd_89(unsigned char * arr)
707{
708 memcpy(arr, vpd89_data, sizeof(vpd89_data));
709 return sizeof(vpd89_data);
710}
711
712
713/* Block limits VPD page (SBC-3) */
714static unsigned char vpdb0_data[] = {
715 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
716 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
717 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
718 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
719};
720
721static int inquiry_evpd_b0(unsigned char * arr)
722{
723 unsigned int gran;
724
725 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
726
727 /* Optimal transfer length granularity */
728 gran = 1 << scsi_debug_physblk_exp;
729 arr[2] = (gran >> 8) & 0xff;
730 arr[3] = gran & 0xff;
731
732 /* Maximum Transfer Length */
733 if (sdebug_store_sectors > 0x400) {
734 arr[4] = (sdebug_store_sectors >> 24) & 0xff;
735 arr[5] = (sdebug_store_sectors >> 16) & 0xff;
736 arr[6] = (sdebug_store_sectors >> 8) & 0xff;
737 arr[7] = sdebug_store_sectors & 0xff;
738 }
739
740 /* Optimal Transfer Length */
741 put_unaligned_be32(scsi_debug_opt_blks, &arr[8]);
742
743 if (scsi_debug_lbpu) {
744 /* Maximum Unmap LBA Count */
745 put_unaligned_be32(scsi_debug_unmap_max_blocks, &arr[16]);
746
747 /* Maximum Unmap Block Descriptor Count */
748 put_unaligned_be32(scsi_debug_unmap_max_desc, &arr[20]);
749 }
750
751 /* Unmap Granularity Alignment */
752 if (scsi_debug_unmap_alignment) {
753 put_unaligned_be32(scsi_debug_unmap_alignment, &arr[28]);
754 arr[28] |= 0x80; /* UGAVALID */
755 }
756
757 /* Optimal Unmap Granularity */
758 put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]);
759
760 /* Maximum WRITE SAME Length */
761 put_unaligned_be64(scsi_debug_write_same_length, &arr[32]);
762
763 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
764
765 return sizeof(vpdb0_data);
766}
767
768/* Block device characteristics VPD page (SBC-3) */
769static int inquiry_evpd_b1(unsigned char *arr)
770{
771 memset(arr, 0, 0x3c);
772 arr[0] = 0;
773 arr[1] = 1; /* non rotating medium (e.g. solid state) */
774 arr[2] = 0;
775 arr[3] = 5; /* less than 1.8" */
776
777 return 0x3c;
778}
779
780/* Logical block provisioning VPD page (SBC-3) */
781static int inquiry_evpd_b2(unsigned char *arr)
782{
783 memset(arr, 0, 0x4);
784 arr[0] = 0; /* threshold exponent */
785
786 if (scsi_debug_lbpu)
787 arr[1] = 1 << 7;
788
789 if (scsi_debug_lbpws)
790 arr[1] |= 1 << 6;
791
792 if (scsi_debug_lbpws10)
793 arr[1] |= 1 << 5;
794
795 if (scsi_debug_lbprz)
796 arr[1] |= 1 << 2;
797
798 return 0x4;
799}
800
801#define SDEBUG_LONG_INQ_SZ 96
802#define SDEBUG_MAX_INQ_ARR_SZ 584
803
804static int resp_inquiry(struct scsi_cmnd * scp, int target,
805 struct sdebug_dev_info * devip)
806{
807 unsigned char pq_pdt;
808 unsigned char * arr;
809 unsigned char *cmd = (unsigned char *)scp->cmnd;
810 int alloc_len, n, ret;
811
812 alloc_len = (cmd[3] << 8) + cmd[4];
813 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
814 if (! arr)
815 return DID_REQUEUE << 16;
816 if (devip->wlun)
817 pq_pdt = 0x1e; /* present, wlun */
818 else if (scsi_debug_no_lun_0 && (0 == devip->lun))
819 pq_pdt = 0x7f; /* not present, no device type */
820 else
821 pq_pdt = (scsi_debug_ptype & 0x1f);
822 arr[0] = pq_pdt;
823 if (0x2 & cmd[1]) { /* CMDDT bit set */
824 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
825 0);
826 kfree(arr);
827 return check_condition_result;
828 } else if (0x1 & cmd[1]) { /* EVPD bit set */
829 int lu_id_num, port_group_id, target_dev_id, len;
830 char lu_id_str[6];
831 int host_no = devip->sdbg_host->shost->host_no;
832
833 port_group_id = (((host_no + 1) & 0x7f) << 8) +
834 (devip->channel & 0x7f);
835 if (0 == scsi_debug_vpd_use_hostno)
836 host_no = 0;
837 lu_id_num = devip->wlun ? -1 : (((host_no + 1) * 2000) +
838 (devip->target * 1000) + devip->lun);
839 target_dev_id = ((host_no + 1) * 2000) +
840 (devip->target * 1000) - 3;
841 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
842 if (0 == cmd[2]) { /* supported vital product data pages */
843 arr[1] = cmd[2]; /*sanity */
844 n = 4;
845 arr[n++] = 0x0; /* this page */
846 arr[n++] = 0x80; /* unit serial number */
847 arr[n++] = 0x83; /* device identification */
848 arr[n++] = 0x84; /* software interface ident. */
849 arr[n++] = 0x85; /* management network addresses */
850 arr[n++] = 0x86; /* extended inquiry */
851 arr[n++] = 0x87; /* mode page policy */
852 arr[n++] = 0x88; /* SCSI ports */
853 arr[n++] = 0x89; /* ATA information */
854 arr[n++] = 0xb0; /* Block limits (SBC) */
855 arr[n++] = 0xb1; /* Block characteristics (SBC) */
856 if (scsi_debug_lbp()) /* Logical Block Prov. (SBC) */
857 arr[n++] = 0xb2;
858 arr[3] = n - 4; /* number of supported VPD pages */
859 } else if (0x80 == cmd[2]) { /* unit serial number */
860 arr[1] = cmd[2]; /*sanity */
861 arr[3] = len;
862 memcpy(&arr[4], lu_id_str, len);
863 } else if (0x83 == cmd[2]) { /* device identification */
864 arr[1] = cmd[2]; /*sanity */
865 arr[3] = inquiry_evpd_83(&arr[4], port_group_id,
866 target_dev_id, lu_id_num,
867 lu_id_str, len);
868 } else if (0x84 == cmd[2]) { /* Software interface ident. */
869 arr[1] = cmd[2]; /*sanity */
870 arr[3] = inquiry_evpd_84(&arr[4]);
871 } else if (0x85 == cmd[2]) { /* Management network addresses */
872 arr[1] = cmd[2]; /*sanity */
873 arr[3] = inquiry_evpd_85(&arr[4]);
874 } else if (0x86 == cmd[2]) { /* extended inquiry */
875 arr[1] = cmd[2]; /*sanity */
876 arr[3] = 0x3c; /* number of following entries */
877 if (scsi_debug_dif == SD_DIF_TYPE3_PROTECTION)
878 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
879 else if (scsi_debug_dif)
880 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
881 else
882 arr[4] = 0x0; /* no protection stuff */
883 arr[5] = 0x7; /* head of q, ordered + simple q's */
884 } else if (0x87 == cmd[2]) { /* mode page policy */
885 arr[1] = cmd[2]; /*sanity */
886 arr[3] = 0x8; /* number of following entries */
887 arr[4] = 0x2; /* disconnect-reconnect mp */
888 arr[6] = 0x80; /* mlus, shared */
889 arr[8] = 0x18; /* protocol specific lu */
890 arr[10] = 0x82; /* mlus, per initiator port */
891 } else if (0x88 == cmd[2]) { /* SCSI Ports */
892 arr[1] = cmd[2]; /*sanity */
893 arr[3] = inquiry_evpd_88(&arr[4], target_dev_id);
894 } else if (0x89 == cmd[2]) { /* ATA information */
895 arr[1] = cmd[2]; /*sanity */
896 n = inquiry_evpd_89(&arr[4]);
897 arr[2] = (n >> 8);
898 arr[3] = (n & 0xff);
899 } else if (0xb0 == cmd[2]) { /* Block limits (SBC) */
900 arr[1] = cmd[2]; /*sanity */
901 arr[3] = inquiry_evpd_b0(&arr[4]);
902 } else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */
903 arr[1] = cmd[2]; /*sanity */
904 arr[3] = inquiry_evpd_b1(&arr[4]);
905 } else if (0xb2 == cmd[2]) { /* Logical Block Prov. (SBC) */
906 arr[1] = cmd[2]; /*sanity */
907 arr[3] = inquiry_evpd_b2(&arr[4]);
908 } else {
909 /* Illegal request, invalid field in cdb */
910 mk_sense_buffer(devip, ILLEGAL_REQUEST,
911 INVALID_FIELD_IN_CDB, 0);
912 kfree(arr);
913 return check_condition_result;
914 }
915 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
916 ret = fill_from_dev_buffer(scp, arr,
917 min(len, SDEBUG_MAX_INQ_ARR_SZ));
918 kfree(arr);
919 return ret;
920 }
921 /* drops through here for a standard inquiry */
922 arr[1] = DEV_REMOVEABLE(target) ? 0x80 : 0; /* Removable disk */
923 arr[2] = scsi_debug_scsi_level;
924 arr[3] = 2; /* response_data_format==2 */
925 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
926 arr[5] = scsi_debug_dif ? 1 : 0; /* PROTECT bit */
927 if (0 == scsi_debug_vpd_use_hostno)
928 arr[5] = 0x10; /* claim: implicit TGPS */
929 arr[6] = 0x10; /* claim: MultiP */
930 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
931 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
932 memcpy(&arr[8], inq_vendor_id, 8);
933 memcpy(&arr[16], inq_product_id, 16);
934 memcpy(&arr[32], inq_product_rev, 4);
935 /* version descriptors (2 bytes each) follow */
936 arr[58] = 0x0; arr[59] = 0x77; /* SAM-3 ANSI */
937 arr[60] = 0x3; arr[61] = 0x14; /* SPC-3 ANSI */
938 n = 62;
939 if (scsi_debug_ptype == 0) {
940 arr[n++] = 0x3; arr[n++] = 0x3d; /* SBC-2 ANSI */
941 } else if (scsi_debug_ptype == 1) {
942 arr[n++] = 0x3; arr[n++] = 0x60; /* SSC-2 no version */
943 }
944 arr[n++] = 0xc; arr[n++] = 0xf; /* SAS-1.1 rev 10 */
945 ret = fill_from_dev_buffer(scp, arr,
946 min(alloc_len, SDEBUG_LONG_INQ_SZ));
947 kfree(arr);
948 return ret;
949}
950
951static int resp_requests(struct scsi_cmnd * scp,
952 struct sdebug_dev_info * devip)
953{
954 unsigned char * sbuff;
955 unsigned char *cmd = (unsigned char *)scp->cmnd;
956 unsigned char arr[SDEBUG_SENSE_LEN];
957 int want_dsense;
958 int len = 18;
959
960 memset(arr, 0, sizeof(arr));
961 if (devip->reset == 1)
962 mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0);
963 want_dsense = !!(cmd[1] & 1) || scsi_debug_dsense;
964 sbuff = devip->sense_buff;
965 if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
966 if (want_dsense) {
967 arr[0] = 0x72;
968 arr[1] = 0x0; /* NO_SENSE in sense_key */
969 arr[2] = THRESHOLD_EXCEEDED;
970 arr[3] = 0xff; /* TEST set and MRIE==6 */
971 } else {
972 arr[0] = 0x70;
973 arr[2] = 0x0; /* NO_SENSE in sense_key */
974 arr[7] = 0xa; /* 18 byte sense buffer */
975 arr[12] = THRESHOLD_EXCEEDED;
976 arr[13] = 0xff; /* TEST set and MRIE==6 */
977 }
978 } else {
979 memcpy(arr, sbuff, SDEBUG_SENSE_LEN);
980 if ((cmd[1] & 1) && (! scsi_debug_dsense)) {
981 /* DESC bit set and sense_buff in fixed format */
982 memset(arr, 0, sizeof(arr));
983 arr[0] = 0x72;
984 arr[1] = sbuff[2]; /* sense key */
985 arr[2] = sbuff[12]; /* asc */
986 arr[3] = sbuff[13]; /* ascq */
987 len = 8;
988 }
989 }
990 mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0);
991 return fill_from_dev_buffer(scp, arr, len);
992}
993
994static int resp_start_stop(struct scsi_cmnd * scp,
995 struct sdebug_dev_info * devip)
996{
997 unsigned char *cmd = (unsigned char *)scp->cmnd;
998 int power_cond, errsts, start;
999
1000 if ((errsts = check_readiness(scp, 1, devip)))
1001 return errsts;
1002 power_cond = (cmd[4] & 0xf0) >> 4;
1003 if (power_cond) {
1004 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
1005 0);
1006 return check_condition_result;
1007 }
1008 start = cmd[4] & 1;
1009 if (start == devip->stopped)
1010 devip->stopped = !start;
1011 return 0;
1012}
1013
1014static sector_t get_sdebug_capacity(void)
1015{
1016 if (scsi_debug_virtual_gb > 0)
1017 return (sector_t)scsi_debug_virtual_gb *
1018 (1073741824 / scsi_debug_sector_size);
1019 else
1020 return sdebug_store_sectors;
1021}
1022
1023#define SDEBUG_READCAP_ARR_SZ 8
1024static int resp_readcap(struct scsi_cmnd * scp,
1025 struct sdebug_dev_info * devip)
1026{
1027 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
1028 unsigned int capac;
1029 int errsts;
1030
1031 if ((errsts = check_readiness(scp, 1, devip)))
1032 return errsts;
1033 /* following just in case virtual_gb changed */
1034 sdebug_capacity = get_sdebug_capacity();
1035 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
1036 if (sdebug_capacity < 0xffffffff) {
1037 capac = (unsigned int)sdebug_capacity - 1;
1038 arr[0] = (capac >> 24);
1039 arr[1] = (capac >> 16) & 0xff;
1040 arr[2] = (capac >> 8) & 0xff;
1041 arr[3] = capac & 0xff;
1042 } else {
1043 arr[0] = 0xff;
1044 arr[1] = 0xff;
1045 arr[2] = 0xff;
1046 arr[3] = 0xff;
1047 }
1048 arr[6] = (scsi_debug_sector_size >> 8) & 0xff;
1049 arr[7] = scsi_debug_sector_size & 0xff;
1050 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1051}
1052
1053#define SDEBUG_READCAP16_ARR_SZ 32
1054static int resp_readcap16(struct scsi_cmnd * scp,
1055 struct sdebug_dev_info * devip)
1056{
1057 unsigned char *cmd = (unsigned char *)scp->cmnd;
1058 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
1059 unsigned long long capac;
1060 int errsts, k, alloc_len;
1061
1062 if ((errsts = check_readiness(scp, 1, devip)))
1063 return errsts;
1064 alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8)
1065 + cmd[13]);
1066 /* following just in case virtual_gb changed */
1067 sdebug_capacity = get_sdebug_capacity();
1068 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
1069 capac = sdebug_capacity - 1;
1070 for (k = 0; k < 8; ++k, capac >>= 8)
1071 arr[7 - k] = capac & 0xff;
1072 arr[8] = (scsi_debug_sector_size >> 24) & 0xff;
1073 arr[9] = (scsi_debug_sector_size >> 16) & 0xff;
1074 arr[10] = (scsi_debug_sector_size >> 8) & 0xff;
1075 arr[11] = scsi_debug_sector_size & 0xff;
1076 arr[13] = scsi_debug_physblk_exp & 0xf;
1077 arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f;
1078
1079 if (scsi_debug_lbp()) {
1080 arr[14] |= 0x80; /* LBPME */
1081 if (scsi_debug_lbprz)
1082 arr[14] |= 0x40; /* LBPRZ */
1083 }
1084
1085 arr[15] = scsi_debug_lowest_aligned & 0xff;
1086
1087 if (scsi_debug_dif) {
1088 arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */
1089 arr[12] |= 1; /* PROT_EN */
1090 }
1091
1092 return fill_from_dev_buffer(scp, arr,
1093 min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
1094}
1095
1096#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1097
1098static int resp_report_tgtpgs(struct scsi_cmnd * scp,
1099 struct sdebug_dev_info * devip)
1100{
1101 unsigned char *cmd = (unsigned char *)scp->cmnd;
1102 unsigned char * arr;
1103 int host_no = devip->sdbg_host->shost->host_no;
1104 int n, ret, alen, rlen;
1105 int port_group_a, port_group_b, port_a, port_b;
1106
1107 alen = ((cmd[6] << 24) + (cmd[7] << 16) + (cmd[8] << 8)
1108 + cmd[9]);
1109
1110 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1111 if (! arr)
1112 return DID_REQUEUE << 16;
1113 /*
1114 * EVPD page 0x88 states we have two ports, one
1115 * real and a fake port with no device connected.
1116 * So we create two port groups with one port each
1117 * and set the group with port B to unavailable.
1118 */
1119 port_a = 0x1; /* relative port A */
1120 port_b = 0x2; /* relative port B */
1121 port_group_a = (((host_no + 1) & 0x7f) << 8) +
1122 (devip->channel & 0x7f);
1123 port_group_b = (((host_no + 1) & 0x7f) << 8) +
1124 (devip->channel & 0x7f) + 0x80;
1125
1126 /*
1127 * The asymmetric access state is cycled according to the host_id.
1128 */
1129 n = 4;
1130 if (0 == scsi_debug_vpd_use_hostno) {
1131 arr[n++] = host_no % 3; /* Asymm access state */
1132 arr[n++] = 0x0F; /* claim: all states are supported */
1133 } else {
1134 arr[n++] = 0x0; /* Active/Optimized path */
1135 arr[n++] = 0x01; /* claim: only support active/optimized paths */
1136 }
1137 arr[n++] = (port_group_a >> 8) & 0xff;
1138 arr[n++] = port_group_a & 0xff;
1139 arr[n++] = 0; /* Reserved */
1140 arr[n++] = 0; /* Status code */
1141 arr[n++] = 0; /* Vendor unique */
1142 arr[n++] = 0x1; /* One port per group */
1143 arr[n++] = 0; /* Reserved */
1144 arr[n++] = 0; /* Reserved */
1145 arr[n++] = (port_a >> 8) & 0xff;
1146 arr[n++] = port_a & 0xff;
1147 arr[n++] = 3; /* Port unavailable */
1148 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
1149 arr[n++] = (port_group_b >> 8) & 0xff;
1150 arr[n++] = port_group_b & 0xff;
1151 arr[n++] = 0; /* Reserved */
1152 arr[n++] = 0; /* Status code */
1153 arr[n++] = 0; /* Vendor unique */
1154 arr[n++] = 0x1; /* One port per group */
1155 arr[n++] = 0; /* Reserved */
1156 arr[n++] = 0; /* Reserved */
1157 arr[n++] = (port_b >> 8) & 0xff;
1158 arr[n++] = port_b & 0xff;
1159
1160 rlen = n - 4;
1161 arr[0] = (rlen >> 24) & 0xff;
1162 arr[1] = (rlen >> 16) & 0xff;
1163 arr[2] = (rlen >> 8) & 0xff;
1164 arr[3] = rlen & 0xff;
1165
1166 /*
1167 * Return the smallest value of either
1168 * - The allocated length
1169 * - The constructed command length
1170 * - The maximum array size
1171 */
1172 rlen = min(alen,n);
1173 ret = fill_from_dev_buffer(scp, arr,
1174 min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1175 kfree(arr);
1176 return ret;
1177}
1178
1179/* <<Following mode page info copied from ST318451LW>> */
1180
1181static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target)
1182{ /* Read-Write Error Recovery page for mode_sense */
1183 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
1184 5, 0, 0xff, 0xff};
1185
1186 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
1187 if (1 == pcontrol)
1188 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
1189 return sizeof(err_recov_pg);
1190}
1191
1192static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target)
1193{ /* Disconnect-Reconnect page for mode_sense */
1194 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
1195 0, 0, 0, 0, 0, 0, 0, 0};
1196
1197 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
1198 if (1 == pcontrol)
1199 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
1200 return sizeof(disconnect_pg);
1201}
1202
1203static int resp_format_pg(unsigned char * p, int pcontrol, int target)
1204{ /* Format device page for mode_sense */
1205 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
1206 0, 0, 0, 0, 0, 0, 0, 0,
1207 0, 0, 0, 0, 0x40, 0, 0, 0};
1208
1209 memcpy(p, format_pg, sizeof(format_pg));
1210 p[10] = (sdebug_sectors_per >> 8) & 0xff;
1211 p[11] = sdebug_sectors_per & 0xff;
1212 p[12] = (scsi_debug_sector_size >> 8) & 0xff;
1213 p[13] = scsi_debug_sector_size & 0xff;
1214 if (DEV_REMOVEABLE(target))
1215 p[20] |= 0x20; /* should agree with INQUIRY */
1216 if (1 == pcontrol)
1217 memset(p + 2, 0, sizeof(format_pg) - 2);
1218 return sizeof(format_pg);
1219}
1220
1221static int resp_caching_pg(unsigned char * p, int pcontrol, int target)
1222{ /* Caching page for mode_sense */
1223 unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
1224 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
1225
1226 memcpy(p, caching_pg, sizeof(caching_pg));
1227 if (1 == pcontrol)
1228 memset(p + 2, 0, sizeof(caching_pg) - 2);
1229 return sizeof(caching_pg);
1230}
1231
1232static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
1233{ /* Control mode page for mode_sense */
1234 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
1235 0, 0, 0, 0};
1236 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
1237 0, 0, 0x2, 0x4b};
1238
1239 if (scsi_debug_dsense)
1240 ctrl_m_pg[2] |= 0x4;
1241 else
1242 ctrl_m_pg[2] &= ~0x4;
1243
1244 if (scsi_debug_ato)
1245 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
1246
1247 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
1248 if (1 == pcontrol)
1249 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
1250 else if (2 == pcontrol)
1251 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
1252 return sizeof(ctrl_m_pg);
1253}
1254
1255
1256static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target)
1257{ /* Informational Exceptions control mode page for mode_sense */
1258 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
1259 0, 0, 0x0, 0x0};
1260 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1261 0, 0, 0x0, 0x0};
1262
1263 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
1264 if (1 == pcontrol)
1265 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
1266 else if (2 == pcontrol)
1267 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
1268 return sizeof(iec_m_pg);
1269}
1270
1271static int resp_sas_sf_m_pg(unsigned char * p, int pcontrol, int target)
1272{ /* SAS SSP mode page - short format for mode_sense */
1273 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
1274 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
1275
1276 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
1277 if (1 == pcontrol)
1278 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
1279 return sizeof(sas_sf_m_pg);
1280}
1281
1282
1283static int resp_sas_pcd_m_spg(unsigned char * p, int pcontrol, int target,
1284 int target_dev_id)
1285{ /* SAS phy control and discover mode page for mode_sense */
1286 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
1287 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
1288 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1289 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1290 0x2, 0, 0, 0, 0, 0, 0, 0,
1291 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1292 0, 0, 0, 0, 0, 0, 0, 0,
1293 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
1294 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1295 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1296 0x3, 0, 0, 0, 0, 0, 0, 0,
1297 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1298 0, 0, 0, 0, 0, 0, 0, 0,
1299 };
1300 int port_a, port_b;
1301
1302 port_a = target_dev_id + 1;
1303 port_b = port_a + 1;
1304 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
1305 p[20] = (port_a >> 24);
1306 p[21] = (port_a >> 16) & 0xff;
1307 p[22] = (port_a >> 8) & 0xff;
1308 p[23] = port_a & 0xff;
1309 p[48 + 20] = (port_b >> 24);
1310 p[48 + 21] = (port_b >> 16) & 0xff;
1311 p[48 + 22] = (port_b >> 8) & 0xff;
1312 p[48 + 23] = port_b & 0xff;
1313 if (1 == pcontrol)
1314 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
1315 return sizeof(sas_pcd_m_pg);
1316}
1317
1318static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol)
1319{ /* SAS SSP shared protocol specific port mode subpage */
1320 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
1321 0, 0, 0, 0, 0, 0, 0, 0,
1322 };
1323
1324 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
1325 if (1 == pcontrol)
1326 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
1327 return sizeof(sas_sha_m_pg);
1328}
1329
1330#define SDEBUG_MAX_MSENSE_SZ 256
1331
1332static int resp_mode_sense(struct scsi_cmnd * scp, int target,
1333 struct sdebug_dev_info * devip)
1334{
1335 unsigned char dbd, llbaa;
1336 int pcontrol, pcode, subpcode, bd_len;
1337 unsigned char dev_spec;
1338 int k, alloc_len, msense_6, offset, len, errsts, target_dev_id;
1339 unsigned char * ap;
1340 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
1341 unsigned char *cmd = (unsigned char *)scp->cmnd;
1342
1343 if ((errsts = check_readiness(scp, 1, devip)))
1344 return errsts;
1345 dbd = !!(cmd[1] & 0x8);
1346 pcontrol = (cmd[2] & 0xc0) >> 6;
1347 pcode = cmd[2] & 0x3f;
1348 subpcode = cmd[3];
1349 msense_6 = (MODE_SENSE == cmd[0]);
1350 llbaa = msense_6 ? 0 : !!(cmd[1] & 0x10);
1351 if ((0 == scsi_debug_ptype) && (0 == dbd))
1352 bd_len = llbaa ? 16 : 8;
1353 else
1354 bd_len = 0;
1355 alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]);
1356 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
1357 if (0x3 == pcontrol) { /* Saving values not supported */
1358 mk_sense_buffer(devip, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP,
1359 0);
1360 return check_condition_result;
1361 }
1362 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
1363 (devip->target * 1000) - 3;
1364 /* set DPOFUA bit for disks */
1365 if (0 == scsi_debug_ptype)
1366 dev_spec = (DEV_READONLY(target) ? 0x80 : 0x0) | 0x10;
1367 else
1368 dev_spec = 0x0;
1369 if (msense_6) {
1370 arr[2] = dev_spec;
1371 arr[3] = bd_len;
1372 offset = 4;
1373 } else {
1374 arr[3] = dev_spec;
1375 if (16 == bd_len)
1376 arr[4] = 0x1; /* set LONGLBA bit */
1377 arr[7] = bd_len; /* assume 255 or less */
1378 offset = 8;
1379 }
1380 ap = arr + offset;
1381 if ((bd_len > 0) && (!sdebug_capacity))
1382 sdebug_capacity = get_sdebug_capacity();
1383
1384 if (8 == bd_len) {
1385 if (sdebug_capacity > 0xfffffffe) {
1386 ap[0] = 0xff;
1387 ap[1] = 0xff;
1388 ap[2] = 0xff;
1389 ap[3] = 0xff;
1390 } else {
1391 ap[0] = (sdebug_capacity >> 24) & 0xff;
1392 ap[1] = (sdebug_capacity >> 16) & 0xff;
1393 ap[2] = (sdebug_capacity >> 8) & 0xff;
1394 ap[3] = sdebug_capacity & 0xff;
1395 }
1396 ap[6] = (scsi_debug_sector_size >> 8) & 0xff;
1397 ap[7] = scsi_debug_sector_size & 0xff;
1398 offset += bd_len;
1399 ap = arr + offset;
1400 } else if (16 == bd_len) {
1401 unsigned long long capac = sdebug_capacity;
1402
1403 for (k = 0; k < 8; ++k, capac >>= 8)
1404 ap[7 - k] = capac & 0xff;
1405 ap[12] = (scsi_debug_sector_size >> 24) & 0xff;
1406 ap[13] = (scsi_debug_sector_size >> 16) & 0xff;
1407 ap[14] = (scsi_debug_sector_size >> 8) & 0xff;
1408 ap[15] = scsi_debug_sector_size & 0xff;
1409 offset += bd_len;
1410 ap = arr + offset;
1411 }
1412
1413 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
1414 /* TODO: Control Extension page */
1415 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
1416 0);
1417 return check_condition_result;
1418 }
1419 switch (pcode) {
1420 case 0x1: /* Read-Write error recovery page, direct access */
1421 len = resp_err_recov_pg(ap, pcontrol, target);
1422 offset += len;
1423 break;
1424 case 0x2: /* Disconnect-Reconnect page, all devices */
1425 len = resp_disconnect_pg(ap, pcontrol, target);
1426 offset += len;
1427 break;
1428 case 0x3: /* Format device page, direct access */
1429 len = resp_format_pg(ap, pcontrol, target);
1430 offset += len;
1431 break;
1432 case 0x8: /* Caching page, direct access */
1433 len = resp_caching_pg(ap, pcontrol, target);
1434 offset += len;
1435 break;
1436 case 0xa: /* Control Mode page, all devices */
1437 len = resp_ctrl_m_pg(ap, pcontrol, target);
1438 offset += len;
1439 break;
1440 case 0x19: /* if spc==1 then sas phy, control+discover */
1441 if ((subpcode > 0x2) && (subpcode < 0xff)) {
1442 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1443 INVALID_FIELD_IN_CDB, 0);
1444 return check_condition_result;
1445 }
1446 len = 0;
1447 if ((0x0 == subpcode) || (0xff == subpcode))
1448 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
1449 if ((0x1 == subpcode) || (0xff == subpcode))
1450 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
1451 target_dev_id);
1452 if ((0x2 == subpcode) || (0xff == subpcode))
1453 len += resp_sas_sha_m_spg(ap + len, pcontrol);
1454 offset += len;
1455 break;
1456 case 0x1c: /* Informational Exceptions Mode page, all devices */
1457 len = resp_iec_m_pg(ap, pcontrol, target);
1458 offset += len;
1459 break;
1460 case 0x3f: /* Read all Mode pages */
1461 if ((0 == subpcode) || (0xff == subpcode)) {
1462 len = resp_err_recov_pg(ap, pcontrol, target);
1463 len += resp_disconnect_pg(ap + len, pcontrol, target);
1464 len += resp_format_pg(ap + len, pcontrol, target);
1465 len += resp_caching_pg(ap + len, pcontrol, target);
1466 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
1467 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
1468 if (0xff == subpcode) {
1469 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
1470 target, target_dev_id);
1471 len += resp_sas_sha_m_spg(ap + len, pcontrol);
1472 }
1473 len += resp_iec_m_pg(ap + len, pcontrol, target);
1474 } else {
1475 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1476 INVALID_FIELD_IN_CDB, 0);
1477 return check_condition_result;
1478 }
1479 offset += len;
1480 break;
1481 default:
1482 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
1483 0);
1484 return check_condition_result;
1485 }
1486 if (msense_6)
1487 arr[0] = offset - 1;
1488 else {
1489 arr[0] = ((offset - 2) >> 8) & 0xff;
1490 arr[1] = (offset - 2) & 0xff;
1491 }
1492 return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
1493}
1494
1495#define SDEBUG_MAX_MSELECT_SZ 512
1496
1497static int resp_mode_select(struct scsi_cmnd * scp, int mselect6,
1498 struct sdebug_dev_info * devip)
1499{
1500 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
1501 int param_len, res, errsts, mpage;
1502 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
1503 unsigned char *cmd = (unsigned char *)scp->cmnd;
1504
1505 if ((errsts = check_readiness(scp, 1, devip)))
1506 return errsts;
1507 memset(arr, 0, sizeof(arr));
1508 pf = cmd[1] & 0x10;
1509 sp = cmd[1] & 0x1;
1510 param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]);
1511 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
1512 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1513 INVALID_FIELD_IN_CDB, 0);
1514 return check_condition_result;
1515 }
1516 res = fetch_to_dev_buffer(scp, arr, param_len);
1517 if (-1 == res)
1518 return (DID_ERROR << 16);
1519 else if ((res < param_len) &&
1520 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
1521 printk(KERN_INFO "scsi_debug: mode_select: cdb indicated=%d, "
1522 " IO sent=%d bytes\n", param_len, res);
1523 md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2);
1524 bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]);
1525 if (md_len > 2) {
1526 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1527 INVALID_FIELD_IN_PARAM_LIST, 0);
1528 return check_condition_result;
1529 }
1530 off = bd_len + (mselect6 ? 4 : 8);
1531 mpage = arr[off] & 0x3f;
1532 ps = !!(arr[off] & 0x80);
1533 if (ps) {
1534 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1535 INVALID_FIELD_IN_PARAM_LIST, 0);
1536 return check_condition_result;
1537 }
1538 spf = !!(arr[off] & 0x40);
1539 pg_len = spf ? ((arr[off + 2] << 8) + arr[off + 3] + 4) :
1540 (arr[off + 1] + 2);
1541 if ((pg_len + off) > param_len) {
1542 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1543 PARAMETER_LIST_LENGTH_ERR, 0);
1544 return check_condition_result;
1545 }
1546 switch (mpage) {
1547 case 0xa: /* Control Mode page */
1548 if (ctrl_m_pg[1] == arr[off + 1]) {
1549 memcpy(ctrl_m_pg + 2, arr + off + 2,
1550 sizeof(ctrl_m_pg) - 2);
1551 scsi_debug_dsense = !!(ctrl_m_pg[2] & 0x4);
1552 return 0;
1553 }
1554 break;
1555 case 0x1c: /* Informational Exceptions Mode page */
1556 if (iec_m_pg[1] == arr[off + 1]) {
1557 memcpy(iec_m_pg + 2, arr + off + 2,
1558 sizeof(iec_m_pg) - 2);
1559 return 0;
1560 }
1561 break;
1562 default:
1563 break;
1564 }
1565 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1566 INVALID_FIELD_IN_PARAM_LIST, 0);
1567 return check_condition_result;
1568}
1569
1570static int resp_temp_l_pg(unsigned char * arr)
1571{
1572 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
1573 0x0, 0x1, 0x3, 0x2, 0x0, 65,
1574 };
1575
1576 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
1577 return sizeof(temp_l_pg);
1578}
1579
1580static int resp_ie_l_pg(unsigned char * arr)
1581{
1582 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
1583 };
1584
1585 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
1586 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
1587 arr[4] = THRESHOLD_EXCEEDED;
1588 arr[5] = 0xff;
1589 }
1590 return sizeof(ie_l_pg);
1591}
1592
1593#define SDEBUG_MAX_LSENSE_SZ 512
1594
1595static int resp_log_sense(struct scsi_cmnd * scp,
1596 struct sdebug_dev_info * devip)
1597{
1598 int ppc, sp, pcontrol, pcode, subpcode, alloc_len, errsts, len, n;
1599 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
1600 unsigned char *cmd = (unsigned char *)scp->cmnd;
1601
1602 if ((errsts = check_readiness(scp, 1, devip)))
1603 return errsts;
1604 memset(arr, 0, sizeof(arr));
1605 ppc = cmd[1] & 0x2;
1606 sp = cmd[1] & 0x1;
1607 if (ppc || sp) {
1608 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1609 INVALID_FIELD_IN_CDB, 0);
1610 return check_condition_result;
1611 }
1612 pcontrol = (cmd[2] & 0xc0) >> 6;
1613 pcode = cmd[2] & 0x3f;
1614 subpcode = cmd[3] & 0xff;
1615 alloc_len = (cmd[7] << 8) + cmd[8];
1616 arr[0] = pcode;
1617 if (0 == subpcode) {
1618 switch (pcode) {
1619 case 0x0: /* Supported log pages log page */
1620 n = 4;
1621 arr[n++] = 0x0; /* this page */
1622 arr[n++] = 0xd; /* Temperature */
1623 arr[n++] = 0x2f; /* Informational exceptions */
1624 arr[3] = n - 4;
1625 break;
1626 case 0xd: /* Temperature log page */
1627 arr[3] = resp_temp_l_pg(arr + 4);
1628 break;
1629 case 0x2f: /* Informational exceptions log page */
1630 arr[3] = resp_ie_l_pg(arr + 4);
1631 break;
1632 default:
1633 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1634 INVALID_FIELD_IN_CDB, 0);
1635 return check_condition_result;
1636 }
1637 } else if (0xff == subpcode) {
1638 arr[0] |= 0x40;
1639 arr[1] = subpcode;
1640 switch (pcode) {
1641 case 0x0: /* Supported log pages and subpages log page */
1642 n = 4;
1643 arr[n++] = 0x0;
1644 arr[n++] = 0x0; /* 0,0 page */
1645 arr[n++] = 0x0;
1646 arr[n++] = 0xff; /* this page */
1647 arr[n++] = 0xd;
1648 arr[n++] = 0x0; /* Temperature */
1649 arr[n++] = 0x2f;
1650 arr[n++] = 0x0; /* Informational exceptions */
1651 arr[3] = n - 4;
1652 break;
1653 case 0xd: /* Temperature subpages */
1654 n = 4;
1655 arr[n++] = 0xd;
1656 arr[n++] = 0x0; /* Temperature */
1657 arr[3] = n - 4;
1658 break;
1659 case 0x2f: /* Informational exceptions subpages */
1660 n = 4;
1661 arr[n++] = 0x2f;
1662 arr[n++] = 0x0; /* Informational exceptions */
1663 arr[3] = n - 4;
1664 break;
1665 default:
1666 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1667 INVALID_FIELD_IN_CDB, 0);
1668 return check_condition_result;
1669 }
1670 } else {
1671 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1672 INVALID_FIELD_IN_CDB, 0);
1673 return check_condition_result;
1674 }
1675 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
1676 return fill_from_dev_buffer(scp, arr,
1677 min(len, SDEBUG_MAX_INQ_ARR_SZ));
1678}
1679
1680static int check_device_access_params(struct sdebug_dev_info *devi,
1681 unsigned long long lba, unsigned int num)
1682{
1683 if (lba + num > sdebug_capacity) {
1684 mk_sense_buffer(devi, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE, 0);
1685 return check_condition_result;
1686 }
1687 /* transfer length excessive (tie in to block limits VPD page) */
1688 if (num > sdebug_store_sectors) {
1689 mk_sense_buffer(devi, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
1690 return check_condition_result;
1691 }
1692 return 0;
1693}
1694
1695static int do_device_access(struct scsi_cmnd *scmd,
1696 struct sdebug_dev_info *devi,
1697 unsigned long long lba, unsigned int num, int write)
1698{
1699 int ret;
1700 unsigned long long block, rest = 0;
1701 int (*func)(struct scsi_cmnd *, unsigned char *, int);
1702
1703 func = write ? fetch_to_dev_buffer : fill_from_dev_buffer;
1704
1705 block = do_div(lba, sdebug_store_sectors);
1706 if (block + num > sdebug_store_sectors)
1707 rest = block + num - sdebug_store_sectors;
1708
1709 ret = func(scmd, fake_storep + (block * scsi_debug_sector_size),
1710 (num - rest) * scsi_debug_sector_size);
1711 if (!ret && rest)
1712 ret = func(scmd, fake_storep, rest * scsi_debug_sector_size);
1713
1714 return ret;
1715}
1716
1717static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
1718 unsigned int sectors, u32 ei_lba)
1719{
1720 unsigned int i, resid;
1721 struct scatterlist *psgl;
1722 struct sd_dif_tuple *sdt;
1723 sector_t sector;
1724 sector_t tmp_sec = start_sec;
1725 void *paddr;
1726
1727 start_sec = do_div(tmp_sec, sdebug_store_sectors);
1728
1729 sdt = (struct sd_dif_tuple *)(dif_storep + dif_offset(start_sec));
1730
1731 for (i = 0 ; i < sectors ; i++) {
1732 u16 csum;
1733
1734 if (sdt[i].app_tag == 0xffff)
1735 continue;
1736
1737 sector = start_sec + i;
1738
1739 switch (scsi_debug_guard) {
1740 case 1:
1741 csum = ip_compute_csum(fake_storep +
1742 sector * scsi_debug_sector_size,
1743 scsi_debug_sector_size);
1744 break;
1745 case 0:
1746 csum = crc_t10dif(fake_storep +
1747 sector * scsi_debug_sector_size,
1748 scsi_debug_sector_size);
1749 csum = cpu_to_be16(csum);
1750 break;
1751 default:
1752 BUG();
1753 }
1754
1755 if (sdt[i].guard_tag != csum) {
1756 printk(KERN_ERR "%s: GUARD check failed on sector %lu" \
1757 " rcvd 0x%04x, data 0x%04x\n", __func__,
1758 (unsigned long)sector,
1759 be16_to_cpu(sdt[i].guard_tag),
1760 be16_to_cpu(csum));
1761 dif_errors++;
1762 return 0x01;
1763 }
1764
1765 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION &&
1766 be32_to_cpu(sdt[i].ref_tag) != (sector & 0xffffffff)) {
1767 printk(KERN_ERR "%s: REF check failed on sector %lu\n",
1768 __func__, (unsigned long)sector);
1769 dif_errors++;
1770 return 0x03;
1771 }
1772
1773 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
1774 be32_to_cpu(sdt[i].ref_tag) != ei_lba) {
1775 printk(KERN_ERR "%s: REF check failed on sector %lu\n",
1776 __func__, (unsigned long)sector);
1777 dif_errors++;
1778 return 0x03;
1779 }
1780
1781 ei_lba++;
1782 }
1783
1784 resid = sectors * 8; /* Bytes of protection data to copy into sgl */
1785 sector = start_sec;
1786
1787 scsi_for_each_prot_sg(SCpnt, psgl, scsi_prot_sg_count(SCpnt), i) {
1788 int len = min(psgl->length, resid);
1789
1790 paddr = kmap_atomic(sg_page(psgl)) + psgl->offset;
1791 memcpy(paddr, dif_storep + dif_offset(sector), len);
1792
1793 sector += len >> 3;
1794 if (sector >= sdebug_store_sectors) {
1795 /* Force wrap */
1796 tmp_sec = sector;
1797 sector = do_div(tmp_sec, sdebug_store_sectors);
1798 }
1799 resid -= len;
1800 kunmap_atomic(paddr);
1801 }
1802
1803 dix_reads++;
1804
1805 return 0;
1806}
1807
1808static int resp_read(struct scsi_cmnd *SCpnt, unsigned long long lba,
1809 unsigned int num, struct sdebug_dev_info *devip,
1810 u32 ei_lba)
1811{
1812 unsigned long iflags;
1813 int ret;
1814
1815 ret = check_device_access_params(devip, lba, num);
1816 if (ret)
1817 return ret;
1818
1819 if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) &&
1820 (lba <= (OPT_MEDIUM_ERR_ADDR + OPT_MEDIUM_ERR_NUM - 1)) &&
1821 ((lba + num) > OPT_MEDIUM_ERR_ADDR)) {
1822 /* claim unrecoverable read error */
1823 mk_sense_buffer(devip, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
1824 /* set info field and valid bit for fixed descriptor */
1825 if (0x70 == (devip->sense_buff[0] & 0x7f)) {
1826 devip->sense_buff[0] |= 0x80; /* Valid bit */
1827 ret = (lba < OPT_MEDIUM_ERR_ADDR)
1828 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
1829 devip->sense_buff[3] = (ret >> 24) & 0xff;
1830 devip->sense_buff[4] = (ret >> 16) & 0xff;
1831 devip->sense_buff[5] = (ret >> 8) & 0xff;
1832 devip->sense_buff[6] = ret & 0xff;
1833 }
1834 scsi_set_resid(SCpnt, scsi_bufflen(SCpnt));
1835 return check_condition_result;
1836 }
1837
1838 /* DIX + T10 DIF */
1839 if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
1840 int prot_ret = prot_verify_read(SCpnt, lba, num, ei_lba);
1841
1842 if (prot_ret) {
1843 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, prot_ret);
1844 return illegal_condition_result;
1845 }
1846 }
1847
1848 read_lock_irqsave(&atomic_rw, iflags);
1849 ret = do_device_access(SCpnt, devip, lba, num, 0);
1850 read_unlock_irqrestore(&atomic_rw, iflags);
1851 return ret;
1852}
1853
1854void dump_sector(unsigned char *buf, int len)
1855{
1856 int i, j;
1857
1858 printk(KERN_ERR ">>> Sector Dump <<<\n");
1859
1860 for (i = 0 ; i < len ; i += 16) {
1861 printk(KERN_ERR "%04d: ", i);
1862
1863 for (j = 0 ; j < 16 ; j++) {
1864 unsigned char c = buf[i+j];
1865 if (c >= 0x20 && c < 0x7e)
1866 printk(" %c ", buf[i+j]);
1867 else
1868 printk("%02x ", buf[i+j]);
1869 }
1870
1871 printk("\n");
1872 }
1873}
1874
1875static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
1876 unsigned int sectors, u32 ei_lba)
1877{
1878 int i, j, ret;
1879 struct sd_dif_tuple *sdt;
1880 struct scatterlist *dsgl = scsi_sglist(SCpnt);
1881 struct scatterlist *psgl = scsi_prot_sglist(SCpnt);
1882 void *daddr, *paddr;
1883 sector_t tmp_sec = start_sec;
1884 sector_t sector;
1885 int ppage_offset;
1886 unsigned short csum;
1887
1888 sector = do_div(tmp_sec, sdebug_store_sectors);
1889
1890 BUG_ON(scsi_sg_count(SCpnt) == 0);
1891 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
1892
1893 paddr = kmap_atomic(sg_page(psgl)) + psgl->offset;
1894 ppage_offset = 0;
1895
1896 /* For each data page */
1897 scsi_for_each_sg(SCpnt, dsgl, scsi_sg_count(SCpnt), i) {
1898 daddr = kmap_atomic(sg_page(dsgl)) + dsgl->offset;
1899
1900 /* For each sector-sized chunk in data page */
1901 for (j = 0 ; j < dsgl->length ; j += scsi_debug_sector_size) {
1902
1903 /* If we're at the end of the current
1904 * protection page advance to the next one
1905 */
1906 if (ppage_offset >= psgl->length) {
1907 kunmap_atomic(paddr);
1908 psgl = sg_next(psgl);
1909 BUG_ON(psgl == NULL);
1910 paddr = kmap_atomic(sg_page(psgl))
1911 + psgl->offset;
1912 ppage_offset = 0;
1913 }
1914
1915 sdt = paddr + ppage_offset;
1916
1917 switch (scsi_debug_guard) {
1918 case 1:
1919 csum = ip_compute_csum(daddr,
1920 scsi_debug_sector_size);
1921 break;
1922 case 0:
1923 csum = cpu_to_be16(crc_t10dif(daddr,
1924 scsi_debug_sector_size));
1925 break;
1926 default:
1927 BUG();
1928 ret = 0;
1929 goto out;
1930 }
1931
1932 if (sdt->guard_tag != csum) {
1933 printk(KERN_ERR
1934 "%s: GUARD check failed on sector %lu " \
1935 "rcvd 0x%04x, calculated 0x%04x\n",
1936 __func__, (unsigned long)sector,
1937 be16_to_cpu(sdt->guard_tag),
1938 be16_to_cpu(csum));
1939 ret = 0x01;
1940 dump_sector(daddr, scsi_debug_sector_size);
1941 goto out;
1942 }
1943
1944 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION &&
1945 be32_to_cpu(sdt->ref_tag)
1946 != (start_sec & 0xffffffff)) {
1947 printk(KERN_ERR
1948 "%s: REF check failed on sector %lu\n",
1949 __func__, (unsigned long)sector);
1950 ret = 0x03;
1951 dump_sector(daddr, scsi_debug_sector_size);
1952 goto out;
1953 }
1954
1955 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
1956 be32_to_cpu(sdt->ref_tag) != ei_lba) {
1957 printk(KERN_ERR
1958 "%s: REF check failed on sector %lu\n",
1959 __func__, (unsigned long)sector);
1960 ret = 0x03;
1961 dump_sector(daddr, scsi_debug_sector_size);
1962 goto out;
1963 }
1964
1965 /* Would be great to copy this in bigger
1966 * chunks. However, for the sake of
1967 * correctness we need to verify each sector
1968 * before writing it to "stable" storage
1969 */
1970 memcpy(dif_storep + dif_offset(sector), sdt, 8);
1971
1972 sector++;
1973
1974 if (sector == sdebug_store_sectors)
1975 sector = 0; /* Force wrap */
1976
1977 start_sec++;
1978 ei_lba++;
1979 daddr += scsi_debug_sector_size;
1980 ppage_offset += sizeof(struct sd_dif_tuple);
1981 }
1982
1983 kunmap_atomic(daddr);
1984 }
1985
1986 kunmap_atomic(paddr);
1987
1988 dix_writes++;
1989
1990 return 0;
1991
1992out:
1993 dif_errors++;
1994 kunmap_atomic(daddr);
1995 kunmap_atomic(paddr);
1996 return ret;
1997}
1998
1999static unsigned int map_state(sector_t lba, unsigned int *num)
2000{
2001 unsigned int granularity, alignment, mapped;
2002 sector_t block, next, end;
2003
2004 granularity = scsi_debug_unmap_granularity;
2005 alignment = granularity - scsi_debug_unmap_alignment;
2006 block = lba + alignment;
2007 do_div(block, granularity);
2008
2009 mapped = test_bit(block, map_storep);
2010
2011 if (mapped)
2012 next = find_next_zero_bit(map_storep, map_size, block);
2013 else
2014 next = find_next_bit(map_storep, map_size, block);
2015
2016 end = next * granularity - scsi_debug_unmap_alignment;
2017 *num = end - lba;
2018
2019 return mapped;
2020}
2021
2022static void map_region(sector_t lba, unsigned int len)
2023{
2024 unsigned int granularity, alignment;
2025 sector_t end = lba + len;
2026
2027 granularity = scsi_debug_unmap_granularity;
2028 alignment = granularity - scsi_debug_unmap_alignment;
2029
2030 while (lba < end) {
2031 sector_t block, rem;
2032
2033 block = lba + alignment;
2034 rem = do_div(block, granularity);
2035
2036 if (block < map_size)
2037 set_bit(block, map_storep);
2038
2039 lba += granularity - rem;
2040 }
2041}
2042
2043static void unmap_region(sector_t lba, unsigned int len)
2044{
2045 unsigned int granularity, alignment;
2046 sector_t end = lba + len;
2047
2048 granularity = scsi_debug_unmap_granularity;
2049 alignment = granularity - scsi_debug_unmap_alignment;
2050
2051 while (lba < end) {
2052 sector_t block, rem;
2053
2054 block = lba + alignment;
2055 rem = do_div(block, granularity);
2056
2057 if (rem == 0 && lba + granularity <= end && block < map_size) {
2058 clear_bit(block, map_storep);
2059 if (scsi_debug_lbprz)
2060 memset(fake_storep +
2061 block * scsi_debug_sector_size, 0,
2062 scsi_debug_sector_size);
2063 }
2064 lba += granularity - rem;
2065 }
2066}
2067
2068static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba,
2069 unsigned int num, struct sdebug_dev_info *devip,
2070 u32 ei_lba)
2071{
2072 unsigned long iflags;
2073 int ret;
2074
2075 ret = check_device_access_params(devip, lba, num);
2076 if (ret)
2077 return ret;
2078
2079 /* DIX + T10 DIF */
2080 if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
2081 int prot_ret = prot_verify_write(SCpnt, lba, num, ei_lba);
2082
2083 if (prot_ret) {
2084 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, prot_ret);
2085 return illegal_condition_result;
2086 }
2087 }
2088
2089 write_lock_irqsave(&atomic_rw, iflags);
2090 ret = do_device_access(SCpnt, devip, lba, num, 1);
2091 if (scsi_debug_unmap_granularity)
2092 map_region(lba, num);
2093 write_unlock_irqrestore(&atomic_rw, iflags);
2094 if (-1 == ret)
2095 return (DID_ERROR << 16);
2096 else if ((ret < (num * scsi_debug_sector_size)) &&
2097 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2098 printk(KERN_INFO "scsi_debug: write: cdb indicated=%u, "
2099 " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret);
2100
2101 return 0;
2102}
2103
2104static int resp_write_same(struct scsi_cmnd *scmd, unsigned long long lba,
2105 unsigned int num, struct sdebug_dev_info *devip,
2106 u32 ei_lba, unsigned int unmap)
2107{
2108 unsigned long iflags;
2109 unsigned long long i;
2110 int ret;
2111
2112 ret = check_device_access_params(devip, lba, num);
2113 if (ret)
2114 return ret;
2115
2116 if (num > scsi_debug_write_same_length) {
2117 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
2118 0);
2119 return check_condition_result;
2120 }
2121
2122 write_lock_irqsave(&atomic_rw, iflags);
2123
2124 if (unmap && scsi_debug_unmap_granularity) {
2125 unmap_region(lba, num);
2126 goto out;
2127 }
2128
2129 /* Else fetch one logical block */
2130 ret = fetch_to_dev_buffer(scmd,
2131 fake_storep + (lba * scsi_debug_sector_size),
2132 scsi_debug_sector_size);
2133
2134 if (-1 == ret) {
2135 write_unlock_irqrestore(&atomic_rw, iflags);
2136 return (DID_ERROR << 16);
2137 } else if ((ret < (num * scsi_debug_sector_size)) &&
2138 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2139 printk(KERN_INFO "scsi_debug: write same: cdb indicated=%u, "
2140 " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret);
2141
2142 /* Copy first sector to remaining blocks */
2143 for (i = 1 ; i < num ; i++)
2144 memcpy(fake_storep + ((lba + i) * scsi_debug_sector_size),
2145 fake_storep + (lba * scsi_debug_sector_size),
2146 scsi_debug_sector_size);
2147
2148 if (scsi_debug_unmap_granularity)
2149 map_region(lba, num);
2150out:
2151 write_unlock_irqrestore(&atomic_rw, iflags);
2152
2153 return 0;
2154}
2155
2156struct unmap_block_desc {
2157 __be64 lba;
2158 __be32 blocks;
2159 __be32 __reserved;
2160};
2161
2162static int resp_unmap(struct scsi_cmnd * scmd, struct sdebug_dev_info * devip)
2163{
2164 unsigned char *buf;
2165 struct unmap_block_desc *desc;
2166 unsigned int i, payload_len, descriptors;
2167 int ret;
2168
2169 ret = check_readiness(scmd, 1, devip);
2170 if (ret)
2171 return ret;
2172
2173 payload_len = get_unaligned_be16(&scmd->cmnd[7]);
2174 BUG_ON(scsi_bufflen(scmd) != payload_len);
2175
2176 descriptors = (payload_len - 8) / 16;
2177
2178 buf = kmalloc(scsi_bufflen(scmd), GFP_ATOMIC);
2179 if (!buf)
2180 return check_condition_result;
2181
2182 scsi_sg_copy_to_buffer(scmd, buf, scsi_bufflen(scmd));
2183
2184 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
2185 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
2186
2187 desc = (void *)&buf[8];
2188
2189 for (i = 0 ; i < descriptors ; i++) {
2190 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
2191 unsigned int num = get_unaligned_be32(&desc[i].blocks);
2192
2193 ret = check_device_access_params(devip, lba, num);
2194 if (ret)
2195 goto out;
2196
2197 unmap_region(lba, num);
2198 }
2199
2200 ret = 0;
2201
2202out:
2203 kfree(buf);
2204
2205 return ret;
2206}
2207
2208#define SDEBUG_GET_LBA_STATUS_LEN 32
2209
2210static int resp_get_lba_status(struct scsi_cmnd * scmd,
2211 struct sdebug_dev_info * devip)
2212{
2213 unsigned long long lba;
2214 unsigned int alloc_len, mapped, num;
2215 unsigned char arr[SDEBUG_GET_LBA_STATUS_LEN];
2216 int ret;
2217
2218 ret = check_readiness(scmd, 1, devip);
2219 if (ret)
2220 return ret;
2221
2222 lba = get_unaligned_be64(&scmd->cmnd[2]);
2223 alloc_len = get_unaligned_be32(&scmd->cmnd[10]);
2224
2225 if (alloc_len < 24)
2226 return 0;
2227
2228 ret = check_device_access_params(devip, lba, 1);
2229 if (ret)
2230 return ret;
2231
2232 mapped = map_state(lba, &num);
2233
2234 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
2235 put_unaligned_be32(20, &arr[0]); /* Parameter Data Length */
2236 put_unaligned_be64(lba, &arr[8]); /* LBA */
2237 put_unaligned_be32(num, &arr[16]); /* Number of blocks */
2238 arr[20] = !mapped; /* mapped = 0, unmapped = 1 */
2239
2240 return fill_from_dev_buffer(scmd, arr, SDEBUG_GET_LBA_STATUS_LEN);
2241}
2242
2243#define SDEBUG_RLUN_ARR_SZ 256
2244
2245static int resp_report_luns(struct scsi_cmnd * scp,
2246 struct sdebug_dev_info * devip)
2247{
2248 unsigned int alloc_len;
2249 int lun_cnt, i, upper, num, n, wlun, lun;
2250 unsigned char *cmd = (unsigned char *)scp->cmnd;
2251 int select_report = (int)cmd[2];
2252 struct scsi_lun *one_lun;
2253 unsigned char arr[SDEBUG_RLUN_ARR_SZ];
2254 unsigned char * max_addr;
2255
2256 alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
2257 if ((alloc_len < 4) || (select_report > 2)) {
2258 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
2259 0);
2260 return check_condition_result;
2261 }
2262 /* can produce response with up to 16k luns (lun 0 to lun 16383) */
2263 memset(arr, 0, SDEBUG_RLUN_ARR_SZ);
2264 lun_cnt = scsi_debug_max_luns;
2265 if (1 == select_report)
2266 lun_cnt = 0;
2267 else if (scsi_debug_no_lun_0 && (lun_cnt > 0))
2268 --lun_cnt;
2269 wlun = (select_report > 0) ? 1 : 0;
2270 num = lun_cnt + wlun;
2271 arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff;
2272 arr[3] = (sizeof(struct scsi_lun) * num) & 0xff;
2273 n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) /
2274 sizeof(struct scsi_lun)), num);
2275 if (n < num) {
2276 wlun = 0;
2277 lun_cnt = n;
2278 }
2279 one_lun = (struct scsi_lun *) &arr[8];
2280 max_addr = arr + SDEBUG_RLUN_ARR_SZ;
2281 for (i = 0, lun = (scsi_debug_no_lun_0 ? 1 : 0);
2282 ((i < lun_cnt) && ((unsigned char *)(one_lun + i) < max_addr));
2283 i++, lun++) {
2284 upper = (lun >> 8) & 0x3f;
2285 if (upper)
2286 one_lun[i].scsi_lun[0] =
2287 (upper | (SAM2_LUN_ADDRESS_METHOD << 6));
2288 one_lun[i].scsi_lun[1] = lun & 0xff;
2289 }
2290 if (wlun) {
2291 one_lun[i].scsi_lun[0] = (SAM2_WLUN_REPORT_LUNS >> 8) & 0xff;
2292 one_lun[i].scsi_lun[1] = SAM2_WLUN_REPORT_LUNS & 0xff;
2293 i++;
2294 }
2295 alloc_len = (unsigned char *)(one_lun + i) - arr;
2296 return fill_from_dev_buffer(scp, arr,
2297 min((int)alloc_len, SDEBUG_RLUN_ARR_SZ));
2298}
2299
2300static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
2301 unsigned int num, struct sdebug_dev_info *devip)
2302{
2303 int i, j, ret = -1;
2304 unsigned char *kaddr, *buf;
2305 unsigned int offset;
2306 struct scatterlist *sg;
2307 struct scsi_data_buffer *sdb = scsi_in(scp);
2308
2309 /* better not to use temporary buffer. */
2310 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
2311 if (!buf)
2312 return ret;
2313
2314 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
2315
2316 offset = 0;
2317 for_each_sg(sdb->table.sgl, sg, sdb->table.nents, i) {
2318 kaddr = (unsigned char *)kmap_atomic(sg_page(sg));
2319 if (!kaddr)
2320 goto out;
2321
2322 for (j = 0; j < sg->length; j++)
2323 *(kaddr + sg->offset + j) ^= *(buf + offset + j);
2324
2325 offset += sg->length;
2326 kunmap_atomic(kaddr);
2327 }
2328 ret = 0;
2329out:
2330 kfree(buf);
2331
2332 return ret;
2333}
2334
2335/* When timer goes off this function is called. */
2336static void timer_intr_handler(unsigned long indx)
2337{
2338 struct sdebug_queued_cmd * sqcp;
2339 unsigned long iflags;
2340
2341 if (indx >= scsi_debug_max_queue) {
2342 printk(KERN_ERR "scsi_debug:timer_intr_handler: indx too "
2343 "large\n");
2344 return;
2345 }
2346 spin_lock_irqsave(&queued_arr_lock, iflags);
2347 sqcp = &queued_arr[(int)indx];
2348 if (! sqcp->in_use) {
2349 printk(KERN_ERR "scsi_debug:timer_intr_handler: Unexpected "
2350 "interrupt\n");
2351 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2352 return;
2353 }
2354 sqcp->in_use = 0;
2355 if (sqcp->done_funct) {
2356 sqcp->a_cmnd->result = sqcp->scsi_result;
2357 sqcp->done_funct(sqcp->a_cmnd); /* callback to mid level */
2358 }
2359 sqcp->done_funct = NULL;
2360 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2361}
2362
2363
2364static struct sdebug_dev_info *
2365sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags)
2366{
2367 struct sdebug_dev_info *devip;
2368
2369 devip = kzalloc(sizeof(*devip), flags);
2370 if (devip) {
2371 devip->sdbg_host = sdbg_host;
2372 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
2373 }
2374 return devip;
2375}
2376
2377static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev)
2378{
2379 struct sdebug_host_info * sdbg_host;
2380 struct sdebug_dev_info * open_devip = NULL;
2381 struct sdebug_dev_info * devip =
2382 (struct sdebug_dev_info *)sdev->hostdata;
2383
2384 if (devip)
2385 return devip;
2386 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
2387 if (!sdbg_host) {
2388 printk(KERN_ERR "Host info NULL\n");
2389 return NULL;
2390 }
2391 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
2392 if ((devip->used) && (devip->channel == sdev->channel) &&
2393 (devip->target == sdev->id) &&
2394 (devip->lun == sdev->lun))
2395 return devip;
2396 else {
2397 if ((!devip->used) && (!open_devip))
2398 open_devip = devip;
2399 }
2400 }
2401 if (!open_devip) { /* try and make a new one */
2402 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
2403 if (!open_devip) {
2404 printk(KERN_ERR "%s: out of memory at line %d\n",
2405 __func__, __LINE__);
2406 return NULL;
2407 }
2408 }
2409
2410 open_devip->channel = sdev->channel;
2411 open_devip->target = sdev->id;
2412 open_devip->lun = sdev->lun;
2413 open_devip->sdbg_host = sdbg_host;
2414 open_devip->reset = 1;
2415 open_devip->used = 1;
2416 memset(open_devip->sense_buff, 0, SDEBUG_SENSE_LEN);
2417 if (scsi_debug_dsense)
2418 open_devip->sense_buff[0] = 0x72;
2419 else {
2420 open_devip->sense_buff[0] = 0x70;
2421 open_devip->sense_buff[7] = 0xa;
2422 }
2423 if (sdev->lun == SAM2_WLUN_REPORT_LUNS)
2424 open_devip->wlun = SAM2_WLUN_REPORT_LUNS & 0xff;
2425
2426 return open_devip;
2427}
2428
2429static int scsi_debug_slave_alloc(struct scsi_device *sdp)
2430{
2431 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2432 printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %u>\n",
2433 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
2434 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue);
2435 return 0;
2436}
2437
2438static int scsi_debug_slave_configure(struct scsi_device *sdp)
2439{
2440 struct sdebug_dev_info *devip;
2441
2442 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2443 printk(KERN_INFO "scsi_debug: slave_configure <%u %u %u %u>\n",
2444 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
2445 if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN)
2446 sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN;
2447 devip = devInfoReg(sdp);
2448 if (NULL == devip)
2449 return 1; /* no resources, will be marked offline */
2450 sdp->hostdata = devip;
2451 if (sdp->host->cmd_per_lun)
2452 scsi_adjust_queue_depth(sdp, SDEBUG_TAGGED_QUEUING,
2453 sdp->host->cmd_per_lun);
2454 blk_queue_max_segment_size(sdp->request_queue, 256 * 1024);
2455 if (scsi_debug_no_uld)
2456 sdp->no_uld_attach = 1;
2457 return 0;
2458}
2459
2460static void scsi_debug_slave_destroy(struct scsi_device *sdp)
2461{
2462 struct sdebug_dev_info *devip =
2463 (struct sdebug_dev_info *)sdp->hostdata;
2464
2465 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2466 printk(KERN_INFO "scsi_debug: slave_destroy <%u %u %u %u>\n",
2467 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
2468 if (devip) {
2469 /* make this slot available for re-use */
2470 devip->used = 0;
2471 sdp->hostdata = NULL;
2472 }
2473}
2474
2475/* Returns 1 if found 'cmnd' and deleted its timer. else returns 0 */
2476static int stop_queued_cmnd(struct scsi_cmnd *cmnd)
2477{
2478 unsigned long iflags;
2479 int k;
2480 struct sdebug_queued_cmd *sqcp;
2481
2482 spin_lock_irqsave(&queued_arr_lock, iflags);
2483 for (k = 0; k < scsi_debug_max_queue; ++k) {
2484 sqcp = &queued_arr[k];
2485 if (sqcp->in_use && (cmnd == sqcp->a_cmnd)) {
2486 del_timer_sync(&sqcp->cmnd_timer);
2487 sqcp->in_use = 0;
2488 sqcp->a_cmnd = NULL;
2489 break;
2490 }
2491 }
2492 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2493 return (k < scsi_debug_max_queue) ? 1 : 0;
2494}
2495
2496/* Deletes (stops) timers of all queued commands */
2497static void stop_all_queued(void)
2498{
2499 unsigned long iflags;
2500 int k;
2501 struct sdebug_queued_cmd *sqcp;
2502
2503 spin_lock_irqsave(&queued_arr_lock, iflags);
2504 for (k = 0; k < scsi_debug_max_queue; ++k) {
2505 sqcp = &queued_arr[k];
2506 if (sqcp->in_use && sqcp->a_cmnd) {
2507 del_timer_sync(&sqcp->cmnd_timer);
2508 sqcp->in_use = 0;
2509 sqcp->a_cmnd = NULL;
2510 }
2511 }
2512 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2513}
2514
2515static int scsi_debug_abort(struct scsi_cmnd * SCpnt)
2516{
2517 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2518 printk(KERN_INFO "scsi_debug: abort\n");
2519 ++num_aborts;
2520 stop_queued_cmnd(SCpnt);
2521 return SUCCESS;
2522}
2523
2524static int scsi_debug_biosparam(struct scsi_device *sdev,
2525 struct block_device * bdev, sector_t capacity, int *info)
2526{
2527 int res;
2528 unsigned char *buf;
2529
2530 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2531 printk(KERN_INFO "scsi_debug: biosparam\n");
2532 buf = scsi_bios_ptable(bdev);
2533 if (buf) {
2534 res = scsi_partsize(buf, capacity,
2535 &info[2], &info[0], &info[1]);
2536 kfree(buf);
2537 if (! res)
2538 return res;
2539 }
2540 info[0] = sdebug_heads;
2541 info[1] = sdebug_sectors_per;
2542 info[2] = sdebug_cylinders_per;
2543 return 0;
2544}
2545
2546static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
2547{
2548 struct sdebug_dev_info * devip;
2549
2550 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2551 printk(KERN_INFO "scsi_debug: device_reset\n");
2552 ++num_dev_resets;
2553 if (SCpnt) {
2554 devip = devInfoReg(SCpnt->device);
2555 if (devip)
2556 devip->reset = 1;
2557 }
2558 return SUCCESS;
2559}
2560
2561static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
2562{
2563 struct sdebug_host_info *sdbg_host;
2564 struct sdebug_dev_info * dev_info;
2565 struct scsi_device * sdp;
2566 struct Scsi_Host * hp;
2567
2568 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2569 printk(KERN_INFO "scsi_debug: bus_reset\n");
2570 ++num_bus_resets;
2571 if (SCpnt && ((sdp = SCpnt->device)) && ((hp = sdp->host))) {
2572 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
2573 if (sdbg_host) {
2574 list_for_each_entry(dev_info,
2575 &sdbg_host->dev_info_list,
2576 dev_list)
2577 dev_info->reset = 1;
2578 }
2579 }
2580 return SUCCESS;
2581}
2582
2583static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
2584{
2585 struct sdebug_host_info * sdbg_host;
2586 struct sdebug_dev_info * dev_info;
2587
2588 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2589 printk(KERN_INFO "scsi_debug: host_reset\n");
2590 ++num_host_resets;
2591 spin_lock(&sdebug_host_list_lock);
2592 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
2593 list_for_each_entry(dev_info, &sdbg_host->dev_info_list,
2594 dev_list)
2595 dev_info->reset = 1;
2596 }
2597 spin_unlock(&sdebug_host_list_lock);
2598 stop_all_queued();
2599 return SUCCESS;
2600}
2601
2602/* Initializes timers in queued array */
2603static void __init init_all_queued(void)
2604{
2605 unsigned long iflags;
2606 int k;
2607 struct sdebug_queued_cmd * sqcp;
2608
2609 spin_lock_irqsave(&queued_arr_lock, iflags);
2610 for (k = 0; k < scsi_debug_max_queue; ++k) {
2611 sqcp = &queued_arr[k];
2612 init_timer(&sqcp->cmnd_timer);
2613 sqcp->in_use = 0;
2614 sqcp->a_cmnd = NULL;
2615 }
2616 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2617}
2618
2619static void __init sdebug_build_parts(unsigned char *ramp,
2620 unsigned long store_size)
2621{
2622 struct partition * pp;
2623 int starts[SDEBUG_MAX_PARTS + 2];
2624 int sectors_per_part, num_sectors, k;
2625 int heads_by_sects, start_sec, end_sec;
2626
2627 /* assume partition table already zeroed */
2628 if ((scsi_debug_num_parts < 1) || (store_size < 1048576))
2629 return;
2630 if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) {
2631 scsi_debug_num_parts = SDEBUG_MAX_PARTS;
2632 printk(KERN_WARNING "scsi_debug:build_parts: reducing "
2633 "partitions to %d\n", SDEBUG_MAX_PARTS);
2634 }
2635 num_sectors = (int)sdebug_store_sectors;
2636 sectors_per_part = (num_sectors - sdebug_sectors_per)
2637 / scsi_debug_num_parts;
2638 heads_by_sects = sdebug_heads * sdebug_sectors_per;
2639 starts[0] = sdebug_sectors_per;
2640 for (k = 1; k < scsi_debug_num_parts; ++k)
2641 starts[k] = ((k * sectors_per_part) / heads_by_sects)
2642 * heads_by_sects;
2643 starts[scsi_debug_num_parts] = num_sectors;
2644 starts[scsi_debug_num_parts + 1] = 0;
2645
2646 ramp[510] = 0x55; /* magic partition markings */
2647 ramp[511] = 0xAA;
2648 pp = (struct partition *)(ramp + 0x1be);
2649 for (k = 0; starts[k + 1]; ++k, ++pp) {
2650 start_sec = starts[k];
2651 end_sec = starts[k + 1] - 1;
2652 pp->boot_ind = 0;
2653
2654 pp->cyl = start_sec / heads_by_sects;
2655 pp->head = (start_sec - (pp->cyl * heads_by_sects))
2656 / sdebug_sectors_per;
2657 pp->sector = (start_sec % sdebug_sectors_per) + 1;
2658
2659 pp->end_cyl = end_sec / heads_by_sects;
2660 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
2661 / sdebug_sectors_per;
2662 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
2663
2664 pp->start_sect = start_sec;
2665 pp->nr_sects = end_sec - start_sec + 1;
2666 pp->sys_ind = 0x83; /* plain Linux partition */
2667 }
2668}
2669
2670static int schedule_resp(struct scsi_cmnd * cmnd,
2671 struct sdebug_dev_info * devip,
2672 done_funct_t done, int scsi_result, int delta_jiff)
2673{
2674 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmnd) {
2675 if (scsi_result) {
2676 struct scsi_device * sdp = cmnd->device;
2677
2678 printk(KERN_INFO "scsi_debug: <%u %u %u %u> "
2679 "non-zero result=0x%x\n", sdp->host->host_no,
2680 sdp->channel, sdp->id, sdp->lun, scsi_result);
2681 }
2682 }
2683 if (cmnd && devip) {
2684 /* simulate autosense by this driver */
2685 if (SAM_STAT_CHECK_CONDITION == (scsi_result & 0xff))
2686 memcpy(cmnd->sense_buffer, devip->sense_buff,
2687 (SCSI_SENSE_BUFFERSIZE > SDEBUG_SENSE_LEN) ?
2688 SDEBUG_SENSE_LEN : SCSI_SENSE_BUFFERSIZE);
2689 }
2690 if (delta_jiff <= 0) {
2691 if (cmnd)
2692 cmnd->result = scsi_result;
2693 if (done)
2694 done(cmnd);
2695 return 0;
2696 } else {
2697 unsigned long iflags;
2698 int k;
2699 struct sdebug_queued_cmd * sqcp = NULL;
2700
2701 spin_lock_irqsave(&queued_arr_lock, iflags);
2702 for (k = 0; k < scsi_debug_max_queue; ++k) {
2703 sqcp = &queued_arr[k];
2704 if (! sqcp->in_use)
2705 break;
2706 }
2707 if (k >= scsi_debug_max_queue) {
2708 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2709 printk(KERN_WARNING "scsi_debug: can_queue exceeded\n");
2710 return 1; /* report busy to mid level */
2711 }
2712 sqcp->in_use = 1;
2713 sqcp->a_cmnd = cmnd;
2714 sqcp->scsi_result = scsi_result;
2715 sqcp->done_funct = done;
2716 sqcp->cmnd_timer.function = timer_intr_handler;
2717 sqcp->cmnd_timer.data = k;
2718 sqcp->cmnd_timer.expires = jiffies + delta_jiff;
2719 add_timer(&sqcp->cmnd_timer);
2720 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2721 if (cmnd)
2722 cmnd->result = 0;
2723 return 0;
2724 }
2725}
2726/* Note: The following macros create attribute files in the
2727 /sys/module/scsi_debug/parameters directory. Unfortunately this
2728 driver is unaware of a change and cannot trigger auxiliary actions
2729 as it can when the corresponding attribute in the
2730 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
2731 */
2732module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR);
2733module_param_named(ato, scsi_debug_ato, int, S_IRUGO);
2734module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR);
2735module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO);
2736module_param_named(dif, scsi_debug_dif, int, S_IRUGO);
2737module_param_named(dix, scsi_debug_dix, int, S_IRUGO);
2738module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR);
2739module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR);
2740module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR);
2741module_param_named(guard, scsi_debug_guard, int, S_IRUGO);
2742module_param_named(lbpu, scsi_debug_lbpu, int, S_IRUGO);
2743module_param_named(lbpws, scsi_debug_lbpws, int, S_IRUGO);
2744module_param_named(lbpws10, scsi_debug_lbpws10, int, S_IRUGO);
2745module_param_named(lbprz, scsi_debug_lbprz, int, S_IRUGO);
2746module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO);
2747module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR);
2748module_param_named(max_queue, scsi_debug_max_queue, int, S_IRUGO | S_IWUSR);
2749module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR);
2750module_param_named(no_uld, scsi_debug_no_uld, int, S_IRUGO);
2751module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO);
2752module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR);
2753module_param_named(opt_blks, scsi_debug_opt_blks, int, S_IRUGO);
2754module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR);
2755module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO);
2756module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR);
2757module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO);
2758module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO);
2759module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO);
2760module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO);
2761module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO);
2762module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, int, S_IRUGO);
2763module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR);
2764module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int,
2765 S_IRUGO | S_IWUSR);
2766module_param_named(write_same_length, scsi_debug_write_same_length, int,
2767 S_IRUGO | S_IWUSR);
2768
2769MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
2770MODULE_DESCRIPTION("SCSI debug adapter driver");
2771MODULE_LICENSE("GPL");
2772MODULE_VERSION(SCSI_DEBUG_VERSION);
2773
2774MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
2775MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
2776MODULE_PARM_DESC(delay, "# of jiffies to delay response(def=1)");
2777MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs(def=8)");
2778MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
2779MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
2780MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
2781MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
2782MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
2783MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
2784MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
2785MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
2786MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
2787MODULE_PARM_DESC(lbprz, "unmapped blocks return 0 on read (def=1)");
2788MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
2789MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
2790MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to 255(def))");
2791MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
2792MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
2793MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
2794MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
2795MODULE_PARM_DESC(opt_blks, "optimal transfer length in block (def=64)");
2796MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
2797MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
2798MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
2799MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])");
2800MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
2801MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
2802MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
2803MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
2804MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
2805MODULE_PARM_DESC(virtual_gb, "virtual gigabyte size (def=0 -> use dev_size_mb)");
2806MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
2807MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
2808
2809static char sdebug_info[256];
2810
2811static const char * scsi_debug_info(struct Scsi_Host * shp)
2812{
2813 sprintf(sdebug_info, "scsi_debug, version %s [%s], "
2814 "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION,
2815 scsi_debug_version_date, scsi_debug_dev_size_mb,
2816 scsi_debug_opts);
2817 return sdebug_info;
2818}
2819
2820/* scsi_debug_proc_info
2821 * Used if the driver currently has no own support for /proc/scsi
2822 */
2823static int scsi_debug_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset,
2824 int length, int inout)
2825{
2826 int len, pos, begin;
2827 int orig_length;
2828
2829 orig_length = length;
2830
2831 if (inout == 1) {
2832 char arr[16];
2833 int minLen = length > 15 ? 15 : length;
2834
2835 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
2836 return -EACCES;
2837 memcpy(arr, buffer, minLen);
2838 arr[minLen] = '\0';
2839 if (1 != sscanf(arr, "%d", &pos))
2840 return -EINVAL;
2841 scsi_debug_opts = pos;
2842 if (scsi_debug_every_nth != 0)
2843 scsi_debug_cmnd_count = 0;
2844 return length;
2845 }
2846 begin = 0;
2847 pos = len = sprintf(buffer, "scsi_debug adapter driver, version "
2848 "%s [%s]\n"
2849 "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, "
2850 "every_nth=%d(curr:%d)\n"
2851 "delay=%d, max_luns=%d, scsi_level=%d\n"
2852 "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n"
2853 "number of aborts=%d, device_reset=%d, bus_resets=%d, "
2854 "host_resets=%d\ndix_reads=%d dix_writes=%d dif_errors=%d\n",
2855 SCSI_DEBUG_VERSION, scsi_debug_version_date, scsi_debug_num_tgts,
2856 scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth,
2857 scsi_debug_cmnd_count, scsi_debug_delay,
2858 scsi_debug_max_luns, scsi_debug_scsi_level,
2859 scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads,
2860 sdebug_sectors_per, num_aborts, num_dev_resets, num_bus_resets,
2861 num_host_resets, dix_reads, dix_writes, dif_errors);
2862 if (pos < offset) {
2863 len = 0;
2864 begin = pos;
2865 }
2866 *start = buffer + (offset - begin); /* Start of wanted data */
2867 len -= (offset - begin);
2868 if (len > length)
2869 len = length;
2870 return len;
2871}
2872
2873static ssize_t sdebug_delay_show(struct device_driver * ddp, char * buf)
2874{
2875 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay);
2876}
2877
2878static ssize_t sdebug_delay_store(struct device_driver * ddp,
2879 const char * buf, size_t count)
2880{
2881 int delay;
2882 char work[20];
2883
2884 if (1 == sscanf(buf, "%10s", work)) {
2885 if ((1 == sscanf(work, "%d", &delay)) && (delay >= 0)) {
2886 scsi_debug_delay = delay;
2887 return count;
2888 }
2889 }
2890 return -EINVAL;
2891}
2892DRIVER_ATTR(delay, S_IRUGO | S_IWUSR, sdebug_delay_show,
2893 sdebug_delay_store);
2894
2895static ssize_t sdebug_opts_show(struct device_driver * ddp, char * buf)
2896{
2897 return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts);
2898}
2899
2900static ssize_t sdebug_opts_store(struct device_driver * ddp,
2901 const char * buf, size_t count)
2902{
2903 int opts;
2904 char work[20];
2905
2906 if (1 == sscanf(buf, "%10s", work)) {
2907 if (0 == strnicmp(work,"0x", 2)) {
2908 if (1 == sscanf(&work[2], "%x", &opts))
2909 goto opts_done;
2910 } else {
2911 if (1 == sscanf(work, "%d", &opts))
2912 goto opts_done;
2913 }
2914 }
2915 return -EINVAL;
2916opts_done:
2917 scsi_debug_opts = opts;
2918 scsi_debug_cmnd_count = 0;
2919 return count;
2920}
2921DRIVER_ATTR(opts, S_IRUGO | S_IWUSR, sdebug_opts_show,
2922 sdebug_opts_store);
2923
2924static ssize_t sdebug_ptype_show(struct device_driver * ddp, char * buf)
2925{
2926 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype);
2927}
2928static ssize_t sdebug_ptype_store(struct device_driver * ddp,
2929 const char * buf, size_t count)
2930{
2931 int n;
2932
2933 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2934 scsi_debug_ptype = n;
2935 return count;
2936 }
2937 return -EINVAL;
2938}
2939DRIVER_ATTR(ptype, S_IRUGO | S_IWUSR, sdebug_ptype_show, sdebug_ptype_store);
2940
2941static ssize_t sdebug_dsense_show(struct device_driver * ddp, char * buf)
2942{
2943 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense);
2944}
2945static ssize_t sdebug_dsense_store(struct device_driver * ddp,
2946 const char * buf, size_t count)
2947{
2948 int n;
2949
2950 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2951 scsi_debug_dsense = n;
2952 return count;
2953 }
2954 return -EINVAL;
2955}
2956DRIVER_ATTR(dsense, S_IRUGO | S_IWUSR, sdebug_dsense_show,
2957 sdebug_dsense_store);
2958
2959static ssize_t sdebug_fake_rw_show(struct device_driver * ddp, char * buf)
2960{
2961 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw);
2962}
2963static ssize_t sdebug_fake_rw_store(struct device_driver * ddp,
2964 const char * buf, size_t count)
2965{
2966 int n;
2967
2968 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2969 scsi_debug_fake_rw = n;
2970 return count;
2971 }
2972 return -EINVAL;
2973}
2974DRIVER_ATTR(fake_rw, S_IRUGO | S_IWUSR, sdebug_fake_rw_show,
2975 sdebug_fake_rw_store);
2976
2977static ssize_t sdebug_no_lun_0_show(struct device_driver * ddp, char * buf)
2978{
2979 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0);
2980}
2981static ssize_t sdebug_no_lun_0_store(struct device_driver * ddp,
2982 const char * buf, size_t count)
2983{
2984 int n;
2985
2986 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2987 scsi_debug_no_lun_0 = n;
2988 return count;
2989 }
2990 return -EINVAL;
2991}
2992DRIVER_ATTR(no_lun_0, S_IRUGO | S_IWUSR, sdebug_no_lun_0_show,
2993 sdebug_no_lun_0_store);
2994
2995static ssize_t sdebug_num_tgts_show(struct device_driver * ddp, char * buf)
2996{
2997 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts);
2998}
2999static ssize_t sdebug_num_tgts_store(struct device_driver * ddp,
3000 const char * buf, size_t count)
3001{
3002 int n;
3003
3004 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3005 scsi_debug_num_tgts = n;
3006 sdebug_max_tgts_luns();
3007 return count;
3008 }
3009 return -EINVAL;
3010}
3011DRIVER_ATTR(num_tgts, S_IRUGO | S_IWUSR, sdebug_num_tgts_show,
3012 sdebug_num_tgts_store);
3013
3014static ssize_t sdebug_dev_size_mb_show(struct device_driver * ddp, char * buf)
3015{
3016 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb);
3017}
3018DRIVER_ATTR(dev_size_mb, S_IRUGO, sdebug_dev_size_mb_show, NULL);
3019
3020static ssize_t sdebug_num_parts_show(struct device_driver * ddp, char * buf)
3021{
3022 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts);
3023}
3024DRIVER_ATTR(num_parts, S_IRUGO, sdebug_num_parts_show, NULL);
3025
3026static ssize_t sdebug_every_nth_show(struct device_driver * ddp, char * buf)
3027{
3028 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth);
3029}
3030static ssize_t sdebug_every_nth_store(struct device_driver * ddp,
3031 const char * buf, size_t count)
3032{
3033 int nth;
3034
3035 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
3036 scsi_debug_every_nth = nth;
3037 scsi_debug_cmnd_count = 0;
3038 return count;
3039 }
3040 return -EINVAL;
3041}
3042DRIVER_ATTR(every_nth, S_IRUGO | S_IWUSR, sdebug_every_nth_show,
3043 sdebug_every_nth_store);
3044
3045static ssize_t sdebug_max_luns_show(struct device_driver * ddp, char * buf)
3046{
3047 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns);
3048}
3049static ssize_t sdebug_max_luns_store(struct device_driver * ddp,
3050 const char * buf, size_t count)
3051{
3052 int n;
3053
3054 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3055 scsi_debug_max_luns = n;
3056 sdebug_max_tgts_luns();
3057 return count;
3058 }
3059 return -EINVAL;
3060}
3061DRIVER_ATTR(max_luns, S_IRUGO | S_IWUSR, sdebug_max_luns_show,
3062 sdebug_max_luns_store);
3063
3064static ssize_t sdebug_max_queue_show(struct device_driver * ddp, char * buf)
3065{
3066 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_queue);
3067}
3068static ssize_t sdebug_max_queue_store(struct device_driver * ddp,
3069 const char * buf, size_t count)
3070{
3071 int n;
3072
3073 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
3074 (n <= SCSI_DEBUG_CANQUEUE)) {
3075 scsi_debug_max_queue = n;
3076 return count;
3077 }
3078 return -EINVAL;
3079}
3080DRIVER_ATTR(max_queue, S_IRUGO | S_IWUSR, sdebug_max_queue_show,
3081 sdebug_max_queue_store);
3082
3083static ssize_t sdebug_no_uld_show(struct device_driver * ddp, char * buf)
3084{
3085 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_uld);
3086}
3087DRIVER_ATTR(no_uld, S_IRUGO, sdebug_no_uld_show, NULL);
3088
3089static ssize_t sdebug_scsi_level_show(struct device_driver * ddp, char * buf)
3090{
3091 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level);
3092}
3093DRIVER_ATTR(scsi_level, S_IRUGO, sdebug_scsi_level_show, NULL);
3094
3095static ssize_t sdebug_virtual_gb_show(struct device_driver * ddp, char * buf)
3096{
3097 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb);
3098}
3099static ssize_t sdebug_virtual_gb_store(struct device_driver * ddp,
3100 const char * buf, size_t count)
3101{
3102 int n;
3103
3104 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3105 scsi_debug_virtual_gb = n;
3106
3107 sdebug_capacity = get_sdebug_capacity();
3108
3109 return count;
3110 }
3111 return -EINVAL;
3112}
3113DRIVER_ATTR(virtual_gb, S_IRUGO | S_IWUSR, sdebug_virtual_gb_show,
3114 sdebug_virtual_gb_store);
3115
3116static ssize_t sdebug_add_host_show(struct device_driver * ddp, char * buf)
3117{
3118 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host);
3119}
3120
3121static ssize_t sdebug_add_host_store(struct device_driver * ddp,
3122 const char * buf, size_t count)
3123{
3124 int delta_hosts;
3125
3126 if (sscanf(buf, "%d", &delta_hosts) != 1)
3127 return -EINVAL;
3128 if (delta_hosts > 0) {
3129 do {
3130 sdebug_add_adapter();
3131 } while (--delta_hosts);
3132 } else if (delta_hosts < 0) {
3133 do {
3134 sdebug_remove_adapter();
3135 } while (++delta_hosts);
3136 }
3137 return count;
3138}
3139DRIVER_ATTR(add_host, S_IRUGO | S_IWUSR, sdebug_add_host_show,
3140 sdebug_add_host_store);
3141
3142static ssize_t sdebug_vpd_use_hostno_show(struct device_driver * ddp,
3143 char * buf)
3144{
3145 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_vpd_use_hostno);
3146}
3147static ssize_t sdebug_vpd_use_hostno_store(struct device_driver * ddp,
3148 const char * buf, size_t count)
3149{
3150 int n;
3151
3152 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3153 scsi_debug_vpd_use_hostno = n;
3154 return count;
3155 }
3156 return -EINVAL;
3157}
3158DRIVER_ATTR(vpd_use_hostno, S_IRUGO | S_IWUSR, sdebug_vpd_use_hostno_show,
3159 sdebug_vpd_use_hostno_store);
3160
3161static ssize_t sdebug_sector_size_show(struct device_driver * ddp, char * buf)
3162{
3163 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size);
3164}
3165DRIVER_ATTR(sector_size, S_IRUGO, sdebug_sector_size_show, NULL);
3166
3167static ssize_t sdebug_dix_show(struct device_driver *ddp, char *buf)
3168{
3169 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix);
3170}
3171DRIVER_ATTR(dix, S_IRUGO, sdebug_dix_show, NULL);
3172
3173static ssize_t sdebug_dif_show(struct device_driver *ddp, char *buf)
3174{
3175 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif);
3176}
3177DRIVER_ATTR(dif, S_IRUGO, sdebug_dif_show, NULL);
3178
3179static ssize_t sdebug_guard_show(struct device_driver *ddp, char *buf)
3180{
3181 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_guard);
3182}
3183DRIVER_ATTR(guard, S_IRUGO, sdebug_guard_show, NULL);
3184
3185static ssize_t sdebug_ato_show(struct device_driver *ddp, char *buf)
3186{
3187 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato);
3188}
3189DRIVER_ATTR(ato, S_IRUGO, sdebug_ato_show, NULL);
3190
3191static ssize_t sdebug_map_show(struct device_driver *ddp, char *buf)
3192{
3193 ssize_t count;
3194
3195 if (!scsi_debug_lbp())
3196 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
3197 sdebug_store_sectors);
3198
3199 count = bitmap_scnlistprintf(buf, PAGE_SIZE, map_storep, map_size);
3200
3201 buf[count++] = '\n';
3202 buf[count++] = 0;
3203
3204 return count;
3205}
3206DRIVER_ATTR(map, S_IRUGO, sdebug_map_show, NULL);
3207
3208
3209/* Note: The following function creates attribute files in the
3210 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
3211 files (over those found in the /sys/module/scsi_debug/parameters
3212 directory) is that auxiliary actions can be triggered when an attribute
3213 is changed. For example see: sdebug_add_host_store() above.
3214 */
3215static int do_create_driverfs_files(void)
3216{
3217 int ret;
3218
3219 ret = driver_create_file(&sdebug_driverfs_driver, &driver_attr_add_host);
3220 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_delay);
3221 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb);
3222 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dsense);
3223 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_every_nth);
3224 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_fake_rw);
3225 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_luns);
3226 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_queue);
3227 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_no_lun_0);
3228 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_no_uld);
3229 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_parts);
3230 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_tgts);
3231 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ptype);
3232 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_opts);
3233 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_scsi_level);
3234 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb);
3235 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno);
3236 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_sector_size);
3237 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dix);
3238 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dif);
3239 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_guard);
3240 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ato);
3241 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_map);
3242 return ret;
3243}
3244
3245static void do_remove_driverfs_files(void)
3246{
3247 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_map);
3248 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ato);
3249 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_guard);
3250 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dif);
3251 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dix);
3252 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_sector_size);
3253 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno);
3254 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb);
3255 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_scsi_level);
3256 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_opts);
3257 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ptype);
3258 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_tgts);
3259 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_parts);
3260 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_no_uld);
3261 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_no_lun_0);
3262 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_queue);
3263 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_luns);
3264 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_fake_rw);
3265 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_every_nth);
3266 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dsense);
3267 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb);
3268 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_delay);
3269 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_add_host);
3270}
3271
3272struct device *pseudo_primary;
3273
3274static int __init scsi_debug_init(void)
3275{
3276 unsigned long sz;
3277 int host_to_add;
3278 int k;
3279 int ret;
3280
3281 switch (scsi_debug_sector_size) {
3282 case 512:
3283 case 1024:
3284 case 2048:
3285 case 4096:
3286 break;
3287 default:
3288 printk(KERN_ERR "scsi_debug_init: invalid sector_size %d\n",
3289 scsi_debug_sector_size);
3290 return -EINVAL;
3291 }
3292
3293 switch (scsi_debug_dif) {
3294
3295 case SD_DIF_TYPE0_PROTECTION:
3296 case SD_DIF_TYPE1_PROTECTION:
3297 case SD_DIF_TYPE2_PROTECTION:
3298 case SD_DIF_TYPE3_PROTECTION:
3299 break;
3300
3301 default:
3302 printk(KERN_ERR "scsi_debug_init: dif must be 0, 1, 2 or 3\n");
3303 return -EINVAL;
3304 }
3305
3306 if (scsi_debug_guard > 1) {
3307 printk(KERN_ERR "scsi_debug_init: guard must be 0 or 1\n");
3308 return -EINVAL;
3309 }
3310
3311 if (scsi_debug_ato > 1) {
3312 printk(KERN_ERR "scsi_debug_init: ato must be 0 or 1\n");
3313 return -EINVAL;
3314 }
3315
3316 if (scsi_debug_physblk_exp > 15) {
3317 printk(KERN_ERR "scsi_debug_init: invalid physblk_exp %u\n",
3318 scsi_debug_physblk_exp);
3319 return -EINVAL;
3320 }
3321
3322 if (scsi_debug_lowest_aligned > 0x3fff) {
3323 printk(KERN_ERR "scsi_debug_init: lowest_aligned too big: %u\n",
3324 scsi_debug_lowest_aligned);
3325 return -EINVAL;
3326 }
3327
3328 if (scsi_debug_dev_size_mb < 1)
3329 scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
3330 sz = (unsigned long)scsi_debug_dev_size_mb * 1048576;
3331 sdebug_store_sectors = sz / scsi_debug_sector_size;
3332 sdebug_capacity = get_sdebug_capacity();
3333
3334 /* play around with geometry, don't waste too much on track 0 */
3335 sdebug_heads = 8;
3336 sdebug_sectors_per = 32;
3337 if (scsi_debug_dev_size_mb >= 16)
3338 sdebug_heads = 32;
3339 else if (scsi_debug_dev_size_mb >= 256)
3340 sdebug_heads = 64;
3341 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
3342 (sdebug_sectors_per * sdebug_heads);
3343 if (sdebug_cylinders_per >= 1024) {
3344 /* other LLDs do this; implies >= 1GB ram disk ... */
3345 sdebug_heads = 255;
3346 sdebug_sectors_per = 63;
3347 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
3348 (sdebug_sectors_per * sdebug_heads);
3349 }
3350
3351 fake_storep = vmalloc(sz);
3352 if (NULL == fake_storep) {
3353 printk(KERN_ERR "scsi_debug_init: out of memory, 1\n");
3354 return -ENOMEM;
3355 }
3356 memset(fake_storep, 0, sz);
3357 if (scsi_debug_num_parts > 0)
3358 sdebug_build_parts(fake_storep, sz);
3359
3360 if (scsi_debug_dif) {
3361 int dif_size;
3362
3363 dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple);
3364 dif_storep = vmalloc(dif_size);
3365
3366 printk(KERN_ERR "scsi_debug_init: dif_storep %u bytes @ %p\n",
3367 dif_size, dif_storep);
3368
3369 if (dif_storep == NULL) {
3370 printk(KERN_ERR "scsi_debug_init: out of mem. (DIX)\n");
3371 ret = -ENOMEM;
3372 goto free_vm;
3373 }
3374
3375 memset(dif_storep, 0xff, dif_size);
3376 }
3377
3378 /* Logical Block Provisioning */
3379 if (scsi_debug_lbp()) {
3380 unsigned int map_bytes;
3381
3382 scsi_debug_unmap_max_blocks =
3383 clamp(scsi_debug_unmap_max_blocks, 0U, 0xffffffffU);
3384
3385 scsi_debug_unmap_max_desc =
3386 clamp(scsi_debug_unmap_max_desc, 0U, 256U);
3387
3388 scsi_debug_unmap_granularity =
3389 clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU);
3390
3391 if (scsi_debug_unmap_alignment &&
3392 scsi_debug_unmap_granularity < scsi_debug_unmap_alignment) {
3393 printk(KERN_ERR
3394 "%s: ERR: unmap_granularity < unmap_alignment\n",
3395 __func__);
3396 return -EINVAL;
3397 }
3398
3399 map_size = (sdebug_store_sectors / scsi_debug_unmap_granularity);
3400 map_bytes = map_size >> 3;
3401 map_storep = vmalloc(map_bytes);
3402
3403 printk(KERN_INFO "scsi_debug_init: %lu provisioning blocks\n",
3404 map_size);
3405
3406 if (map_storep == NULL) {
3407 printk(KERN_ERR "scsi_debug_init: out of mem. (MAP)\n");
3408 ret = -ENOMEM;
3409 goto free_vm;
3410 }
3411
3412 memset(map_storep, 0x0, map_bytes);
3413
3414 /* Map first 1KB for partition table */
3415 if (scsi_debug_num_parts)
3416 map_region(0, 2);
3417 }
3418
3419 pseudo_primary = root_device_register("pseudo_0");
3420 if (IS_ERR(pseudo_primary)) {
3421 printk(KERN_WARNING "scsi_debug: root_device_register() error\n");
3422 ret = PTR_ERR(pseudo_primary);
3423 goto free_vm;
3424 }
3425 ret = bus_register(&pseudo_lld_bus);
3426 if (ret < 0) {
3427 printk(KERN_WARNING "scsi_debug: bus_register error: %d\n",
3428 ret);
3429 goto dev_unreg;
3430 }
3431 ret = driver_register(&sdebug_driverfs_driver);
3432 if (ret < 0) {
3433 printk(KERN_WARNING "scsi_debug: driver_register error: %d\n",
3434 ret);
3435 goto bus_unreg;
3436 }
3437 ret = do_create_driverfs_files();
3438 if (ret < 0) {
3439 printk(KERN_WARNING "scsi_debug: driver_create_file error: %d\n",
3440 ret);
3441 goto del_files;
3442 }
3443
3444 init_all_queued();
3445
3446 host_to_add = scsi_debug_add_host;
3447 scsi_debug_add_host = 0;
3448
3449 for (k = 0; k < host_to_add; k++) {
3450 if (sdebug_add_adapter()) {
3451 printk(KERN_ERR "scsi_debug_init: "
3452 "sdebug_add_adapter failed k=%d\n", k);
3453 break;
3454 }
3455 }
3456
3457 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
3458 printk(KERN_INFO "scsi_debug_init: built %d host(s)\n",
3459 scsi_debug_add_host);
3460 }
3461 return 0;
3462
3463del_files:
3464 do_remove_driverfs_files();
3465 driver_unregister(&sdebug_driverfs_driver);
3466bus_unreg:
3467 bus_unregister(&pseudo_lld_bus);
3468dev_unreg:
3469 root_device_unregister(pseudo_primary);
3470free_vm:
3471 if (map_storep)
3472 vfree(map_storep);
3473 if (dif_storep)
3474 vfree(dif_storep);
3475 vfree(fake_storep);
3476
3477 return ret;
3478}
3479
3480static void __exit scsi_debug_exit(void)
3481{
3482 int k = scsi_debug_add_host;
3483
3484 stop_all_queued();
3485 for (; k; k--)
3486 sdebug_remove_adapter();
3487 do_remove_driverfs_files();
3488 driver_unregister(&sdebug_driverfs_driver);
3489 bus_unregister(&pseudo_lld_bus);
3490 root_device_unregister(pseudo_primary);
3491
3492 if (dif_storep)
3493 vfree(dif_storep);
3494
3495 vfree(fake_storep);
3496}
3497
3498device_initcall(scsi_debug_init);
3499module_exit(scsi_debug_exit);
3500
3501static void sdebug_release_adapter(struct device * dev)
3502{
3503 struct sdebug_host_info *sdbg_host;
3504
3505 sdbg_host = to_sdebug_host(dev);
3506 kfree(sdbg_host);
3507}
3508
3509static int sdebug_add_adapter(void)
3510{
3511 int k, devs_per_host;
3512 int error = 0;
3513 struct sdebug_host_info *sdbg_host;
3514 struct sdebug_dev_info *sdbg_devinfo, *tmp;
3515
3516 sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL);
3517 if (NULL == sdbg_host) {
3518 printk(KERN_ERR "%s: out of memory at line %d\n",
3519 __func__, __LINE__);
3520 return -ENOMEM;
3521 }
3522
3523 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
3524
3525 devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns;
3526 for (k = 0; k < devs_per_host; k++) {
3527 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
3528 if (!sdbg_devinfo) {
3529 printk(KERN_ERR "%s: out of memory at line %d\n",
3530 __func__, __LINE__);
3531 error = -ENOMEM;
3532 goto clean;
3533 }
3534 }
3535
3536 spin_lock(&sdebug_host_list_lock);
3537 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
3538 spin_unlock(&sdebug_host_list_lock);
3539
3540 sdbg_host->dev.bus = &pseudo_lld_bus;
3541 sdbg_host->dev.parent = pseudo_primary;
3542 sdbg_host->dev.release = &sdebug_release_adapter;
3543 dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host);
3544
3545 error = device_register(&sdbg_host->dev);
3546
3547 if (error)
3548 goto clean;
3549
3550 ++scsi_debug_add_host;
3551 return error;
3552
3553clean:
3554 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
3555 dev_list) {
3556 list_del(&sdbg_devinfo->dev_list);
3557 kfree(sdbg_devinfo);
3558 }
3559
3560 kfree(sdbg_host);
3561 return error;
3562}
3563
3564static void sdebug_remove_adapter(void)
3565{
3566 struct sdebug_host_info * sdbg_host = NULL;
3567
3568 spin_lock(&sdebug_host_list_lock);
3569 if (!list_empty(&sdebug_host_list)) {
3570 sdbg_host = list_entry(sdebug_host_list.prev,
3571 struct sdebug_host_info, host_list);
3572 list_del(&sdbg_host->host_list);
3573 }
3574 spin_unlock(&sdebug_host_list_lock);
3575
3576 if (!sdbg_host)
3577 return;
3578
3579 device_unregister(&sdbg_host->dev);
3580 --scsi_debug_add_host;
3581}
3582
3583static
3584int scsi_debug_queuecommand_lck(struct scsi_cmnd *SCpnt, done_funct_t done)
3585{
3586 unsigned char *cmd = (unsigned char *) SCpnt->cmnd;
3587 int len, k;
3588 unsigned int num;
3589 unsigned long long lba;
3590 u32 ei_lba;
3591 int errsts = 0;
3592 int target = SCpnt->device->id;
3593 struct sdebug_dev_info *devip = NULL;
3594 int inj_recovered = 0;
3595 int inj_transport = 0;
3596 int inj_dif = 0;
3597 int inj_dix = 0;
3598 int delay_override = 0;
3599 int unmap = 0;
3600
3601 scsi_set_resid(SCpnt, 0);
3602 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmd) {
3603 printk(KERN_INFO "scsi_debug: cmd ");
3604 for (k = 0, len = SCpnt->cmd_len; k < len; ++k)
3605 printk("%02x ", (int)cmd[k]);
3606 printk("\n");
3607 }
3608
3609 if (target == SCpnt->device->host->hostt->this_id) {
3610 printk(KERN_INFO "scsi_debug: initiator's id used as "
3611 "target!\n");
3612 return schedule_resp(SCpnt, NULL, done,
3613 DID_NO_CONNECT << 16, 0);
3614 }
3615
3616 if ((SCpnt->device->lun >= scsi_debug_max_luns) &&
3617 (SCpnt->device->lun != SAM2_WLUN_REPORT_LUNS))
3618 return schedule_resp(SCpnt, NULL, done,
3619 DID_NO_CONNECT << 16, 0);
3620 devip = devInfoReg(SCpnt->device);
3621 if (NULL == devip)
3622 return schedule_resp(SCpnt, NULL, done,
3623 DID_NO_CONNECT << 16, 0);
3624
3625 if ((scsi_debug_every_nth != 0) &&
3626 (++scsi_debug_cmnd_count >= abs(scsi_debug_every_nth))) {
3627 scsi_debug_cmnd_count = 0;
3628 if (scsi_debug_every_nth < -1)
3629 scsi_debug_every_nth = -1;
3630 if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts)
3631 return 0; /* ignore command causing timeout */
3632 else if (SCSI_DEBUG_OPT_MAC_TIMEOUT & scsi_debug_opts &&
3633 scsi_medium_access_command(SCpnt))
3634 return 0; /* time out reads and writes */
3635 else if (SCSI_DEBUG_OPT_RECOVERED_ERR & scsi_debug_opts)
3636 inj_recovered = 1; /* to reads and writes below */
3637 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & scsi_debug_opts)
3638 inj_transport = 1; /* to reads and writes below */
3639 else if (SCSI_DEBUG_OPT_DIF_ERR & scsi_debug_opts)
3640 inj_dif = 1; /* to reads and writes below */
3641 else if (SCSI_DEBUG_OPT_DIX_ERR & scsi_debug_opts)
3642 inj_dix = 1; /* to reads and writes below */
3643 }
3644
3645 if (devip->wlun) {
3646 switch (*cmd) {
3647 case INQUIRY:
3648 case REQUEST_SENSE:
3649 case TEST_UNIT_READY:
3650 case REPORT_LUNS:
3651 break; /* only allowable wlun commands */
3652 default:
3653 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3654 printk(KERN_INFO "scsi_debug: Opcode: 0x%x "
3655 "not supported for wlun\n", *cmd);
3656 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3657 INVALID_OPCODE, 0);
3658 errsts = check_condition_result;
3659 return schedule_resp(SCpnt, devip, done, errsts,
3660 0);
3661 }
3662 }
3663
3664 switch (*cmd) {
3665 case INQUIRY: /* mandatory, ignore unit attention */
3666 delay_override = 1;
3667 errsts = resp_inquiry(SCpnt, target, devip);
3668 break;
3669 case REQUEST_SENSE: /* mandatory, ignore unit attention */
3670 delay_override = 1;
3671 errsts = resp_requests(SCpnt, devip);
3672 break;
3673 case REZERO_UNIT: /* actually this is REWIND for SSC */
3674 case START_STOP:
3675 errsts = resp_start_stop(SCpnt, devip);
3676 break;
3677 case ALLOW_MEDIUM_REMOVAL:
3678 errsts = check_readiness(SCpnt, 1, devip);
3679 if (errsts)
3680 break;
3681 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3682 printk(KERN_INFO "scsi_debug: Medium removal %s\n",
3683 cmd[4] ? "inhibited" : "enabled");
3684 break;
3685 case SEND_DIAGNOSTIC: /* mandatory */
3686 errsts = check_readiness(SCpnt, 1, devip);
3687 break;
3688 case TEST_UNIT_READY: /* mandatory */
3689 delay_override = 1;
3690 errsts = check_readiness(SCpnt, 0, devip);
3691 break;
3692 case RESERVE:
3693 errsts = check_readiness(SCpnt, 1, devip);
3694 break;
3695 case RESERVE_10:
3696 errsts = check_readiness(SCpnt, 1, devip);
3697 break;
3698 case RELEASE:
3699 errsts = check_readiness(SCpnt, 1, devip);
3700 break;
3701 case RELEASE_10:
3702 errsts = check_readiness(SCpnt, 1, devip);
3703 break;
3704 case READ_CAPACITY:
3705 errsts = resp_readcap(SCpnt, devip);
3706 break;
3707 case SERVICE_ACTION_IN:
3708 if (cmd[1] == SAI_READ_CAPACITY_16)
3709 errsts = resp_readcap16(SCpnt, devip);
3710 else if (cmd[1] == SAI_GET_LBA_STATUS) {
3711
3712 if (scsi_debug_lbp() == 0) {
3713 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3714 INVALID_COMMAND_OPCODE, 0);
3715 errsts = check_condition_result;
3716 } else
3717 errsts = resp_get_lba_status(SCpnt, devip);
3718 } else {
3719 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3720 INVALID_OPCODE, 0);
3721 errsts = check_condition_result;
3722 }
3723 break;
3724 case MAINTENANCE_IN:
3725 if (MI_REPORT_TARGET_PGS != cmd[1]) {
3726 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3727 INVALID_OPCODE, 0);
3728 errsts = check_condition_result;
3729 break;
3730 }
3731 errsts = resp_report_tgtpgs(SCpnt, devip);
3732 break;
3733 case READ_16:
3734 case READ_12:
3735 case READ_10:
3736 /* READ{10,12,16} and DIF Type 2 are natural enemies */
3737 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
3738 cmd[1] & 0xe0) {
3739 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3740 INVALID_COMMAND_OPCODE, 0);
3741 errsts = check_condition_result;
3742 break;
3743 }
3744
3745 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
3746 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
3747 (cmd[1] & 0xe0) == 0)
3748 printk(KERN_ERR "Unprotected RD/WR to DIF device\n");
3749
3750 /* fall through */
3751 case READ_6:
3752read:
3753 errsts = check_readiness(SCpnt, 0, devip);
3754 if (errsts)
3755 break;
3756 if (scsi_debug_fake_rw)
3757 break;
3758 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3759 errsts = resp_read(SCpnt, lba, num, devip, ei_lba);
3760 if (inj_recovered && (0 == errsts)) {
3761 mk_sense_buffer(devip, RECOVERED_ERROR,
3762 THRESHOLD_EXCEEDED, 0);
3763 errsts = check_condition_result;
3764 } else if (inj_transport && (0 == errsts)) {
3765 mk_sense_buffer(devip, ABORTED_COMMAND,
3766 TRANSPORT_PROBLEM, ACK_NAK_TO);
3767 errsts = check_condition_result;
3768 } else if (inj_dif && (0 == errsts)) {
3769 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1);
3770 errsts = illegal_condition_result;
3771 } else if (inj_dix && (0 == errsts)) {
3772 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1);
3773 errsts = illegal_condition_result;
3774 }
3775 break;
3776 case REPORT_LUNS: /* mandatory, ignore unit attention */
3777 delay_override = 1;
3778 errsts = resp_report_luns(SCpnt, devip);
3779 break;
3780 case VERIFY: /* 10 byte SBC-2 command */
3781 errsts = check_readiness(SCpnt, 0, devip);
3782 break;
3783 case WRITE_16:
3784 case WRITE_12:
3785 case WRITE_10:
3786 /* WRITE{10,12,16} and DIF Type 2 are natural enemies */
3787 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
3788 cmd[1] & 0xe0) {
3789 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3790 INVALID_COMMAND_OPCODE, 0);
3791 errsts = check_condition_result;
3792 break;
3793 }
3794
3795 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
3796 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
3797 (cmd[1] & 0xe0) == 0)
3798 printk(KERN_ERR "Unprotected RD/WR to DIF device\n");
3799
3800 /* fall through */
3801 case WRITE_6:
3802write:
3803 errsts = check_readiness(SCpnt, 0, devip);
3804 if (errsts)
3805 break;
3806 if (scsi_debug_fake_rw)
3807 break;
3808 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3809 errsts = resp_write(SCpnt, lba, num, devip, ei_lba);
3810 if (inj_recovered && (0 == errsts)) {
3811 mk_sense_buffer(devip, RECOVERED_ERROR,
3812 THRESHOLD_EXCEEDED, 0);
3813 errsts = check_condition_result;
3814 } else if (inj_dif && (0 == errsts)) {
3815 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1);
3816 errsts = illegal_condition_result;
3817 } else if (inj_dix && (0 == errsts)) {
3818 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1);
3819 errsts = illegal_condition_result;
3820 }
3821 break;
3822 case WRITE_SAME_16:
3823 case WRITE_SAME:
3824 if (cmd[1] & 0x8) {
3825 if ((*cmd == WRITE_SAME_16 && scsi_debug_lbpws == 0) ||
3826 (*cmd == WRITE_SAME && scsi_debug_lbpws10 == 0)) {
3827 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3828 INVALID_FIELD_IN_CDB, 0);
3829 errsts = check_condition_result;
3830 } else
3831 unmap = 1;
3832 }
3833 if (errsts)
3834 break;
3835 errsts = check_readiness(SCpnt, 0, devip);
3836 if (errsts)
3837 break;
3838 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3839 errsts = resp_write_same(SCpnt, lba, num, devip, ei_lba, unmap);
3840 break;
3841 case UNMAP:
3842 errsts = check_readiness(SCpnt, 0, devip);
3843 if (errsts)
3844 break;
3845
3846 if (scsi_debug_unmap_max_desc == 0 || scsi_debug_lbpu == 0) {
3847 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3848 INVALID_COMMAND_OPCODE, 0);
3849 errsts = check_condition_result;
3850 } else
3851 errsts = resp_unmap(SCpnt, devip);
3852 break;
3853 case MODE_SENSE:
3854 case MODE_SENSE_10:
3855 errsts = resp_mode_sense(SCpnt, target, devip);
3856 break;
3857 case MODE_SELECT:
3858 errsts = resp_mode_select(SCpnt, 1, devip);
3859 break;
3860 case MODE_SELECT_10:
3861 errsts = resp_mode_select(SCpnt, 0, devip);
3862 break;
3863 case LOG_SENSE:
3864 errsts = resp_log_sense(SCpnt, devip);
3865 break;
3866 case SYNCHRONIZE_CACHE:
3867 delay_override = 1;
3868 errsts = check_readiness(SCpnt, 0, devip);
3869 break;
3870 case WRITE_BUFFER:
3871 errsts = check_readiness(SCpnt, 1, devip);
3872 break;
3873 case XDWRITEREAD_10:
3874 if (!scsi_bidi_cmnd(SCpnt)) {
3875 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3876 INVALID_FIELD_IN_CDB, 0);
3877 errsts = check_condition_result;
3878 break;
3879 }
3880
3881 errsts = check_readiness(SCpnt, 0, devip);
3882 if (errsts)
3883 break;
3884 if (scsi_debug_fake_rw)
3885 break;
3886 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3887 errsts = resp_read(SCpnt, lba, num, devip, ei_lba);
3888 if (errsts)
3889 break;
3890 errsts = resp_write(SCpnt, lba, num, devip, ei_lba);
3891 if (errsts)
3892 break;
3893 errsts = resp_xdwriteread(SCpnt, lba, num, devip);
3894 break;
3895 case VARIABLE_LENGTH_CMD:
3896 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION) {
3897
3898 if ((cmd[10] & 0xe0) == 0)
3899 printk(KERN_ERR
3900 "Unprotected RD/WR to DIF device\n");
3901
3902 if (cmd[9] == READ_32) {
3903 BUG_ON(SCpnt->cmd_len < 32);
3904 goto read;
3905 }
3906
3907 if (cmd[9] == WRITE_32) {
3908 BUG_ON(SCpnt->cmd_len < 32);
3909 goto write;
3910 }
3911 }
3912
3913 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3914 INVALID_FIELD_IN_CDB, 0);
3915 errsts = check_condition_result;
3916 break;
3917
3918 default:
3919 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3920 printk(KERN_INFO "scsi_debug: Opcode: 0x%x not "
3921 "supported\n", *cmd);
3922 errsts = check_readiness(SCpnt, 1, devip);
3923 if (errsts)
3924 break; /* Unit attention takes precedence */
3925 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
3926 errsts = check_condition_result;
3927 break;
3928 }
3929 return schedule_resp(SCpnt, devip, done, errsts,
3930 (delay_override ? 0 : scsi_debug_delay));
3931}
3932
3933static DEF_SCSI_QCMD(scsi_debug_queuecommand)
3934
3935static struct scsi_host_template sdebug_driver_template = {
3936 .proc_info = scsi_debug_proc_info,
3937 .proc_name = sdebug_proc_name,
3938 .name = "SCSI DEBUG",
3939 .info = scsi_debug_info,
3940 .slave_alloc = scsi_debug_slave_alloc,
3941 .slave_configure = scsi_debug_slave_configure,
3942 .slave_destroy = scsi_debug_slave_destroy,
3943 .ioctl = scsi_debug_ioctl,
3944 .queuecommand = scsi_debug_queuecommand,
3945 .eh_abort_handler = scsi_debug_abort,
3946 .eh_bus_reset_handler = scsi_debug_bus_reset,
3947 .eh_device_reset_handler = scsi_debug_device_reset,
3948 .eh_host_reset_handler = scsi_debug_host_reset,
3949 .bios_param = scsi_debug_biosparam,
3950 .can_queue = SCSI_DEBUG_CANQUEUE,
3951 .this_id = 7,
3952 .sg_tablesize = 256,
3953 .cmd_per_lun = 16,
3954 .max_sectors = 0xffff,
3955 .use_clustering = DISABLE_CLUSTERING,
3956 .module = THIS_MODULE,
3957};
3958
3959static int sdebug_driver_probe(struct device * dev)
3960{
3961 int error = 0;
3962 struct sdebug_host_info *sdbg_host;
3963 struct Scsi_Host *hpnt;
3964 int host_prot;
3965
3966 sdbg_host = to_sdebug_host(dev);
3967
3968 sdebug_driver_template.can_queue = scsi_debug_max_queue;
3969 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
3970 if (NULL == hpnt) {
3971 printk(KERN_ERR "%s: scsi_register failed\n", __func__);
3972 error = -ENODEV;
3973 return error;
3974 }
3975
3976 sdbg_host->shost = hpnt;
3977 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
3978 if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id))
3979 hpnt->max_id = scsi_debug_num_tgts + 1;
3980 else
3981 hpnt->max_id = scsi_debug_num_tgts;
3982 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; /* = scsi_debug_max_luns; */
3983
3984 host_prot = 0;
3985
3986 switch (scsi_debug_dif) {
3987
3988 case SD_DIF_TYPE1_PROTECTION:
3989 host_prot = SHOST_DIF_TYPE1_PROTECTION;
3990 if (scsi_debug_dix)
3991 host_prot |= SHOST_DIX_TYPE1_PROTECTION;
3992 break;
3993
3994 case SD_DIF_TYPE2_PROTECTION:
3995 host_prot = SHOST_DIF_TYPE2_PROTECTION;
3996 if (scsi_debug_dix)
3997 host_prot |= SHOST_DIX_TYPE2_PROTECTION;
3998 break;
3999
4000 case SD_DIF_TYPE3_PROTECTION:
4001 host_prot = SHOST_DIF_TYPE3_PROTECTION;
4002 if (scsi_debug_dix)
4003 host_prot |= SHOST_DIX_TYPE3_PROTECTION;
4004 break;
4005
4006 default:
4007 if (scsi_debug_dix)
4008 host_prot |= SHOST_DIX_TYPE0_PROTECTION;
4009 break;
4010 }
4011
4012 scsi_host_set_prot(hpnt, host_prot);
4013
4014 printk(KERN_INFO "scsi_debug: host protection%s%s%s%s%s%s%s\n",
4015 (host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
4016 (host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
4017 (host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
4018 (host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
4019 (host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
4020 (host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
4021 (host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
4022
4023 if (scsi_debug_guard == 1)
4024 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
4025 else
4026 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
4027
4028 error = scsi_add_host(hpnt, &sdbg_host->dev);
4029 if (error) {
4030 printk(KERN_ERR "%s: scsi_add_host failed\n", __func__);
4031 error = -ENODEV;
4032 scsi_host_put(hpnt);
4033 } else
4034 scsi_scan_host(hpnt);
4035
4036
4037 return error;
4038}
4039
4040static int sdebug_driver_remove(struct device * dev)
4041{
4042 struct sdebug_host_info *sdbg_host;
4043 struct sdebug_dev_info *sdbg_devinfo, *tmp;
4044
4045 sdbg_host = to_sdebug_host(dev);
4046
4047 if (!sdbg_host) {
4048 printk(KERN_ERR "%s: Unable to locate host info\n",
4049 __func__);
4050 return -ENODEV;
4051 }
4052
4053 scsi_remove_host(sdbg_host->shost);
4054
4055 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
4056 dev_list) {
4057 list_del(&sdbg_devinfo->dev_list);
4058 kfree(sdbg_devinfo);
4059 }
4060
4061 scsi_host_put(sdbg_host->shost);
4062 return 0;
4063}
4064
4065static int pseudo_lld_bus_match(struct device *dev,
4066 struct device_driver *dev_driver)
4067{
4068 return 1;
4069}
4070
4071static struct bus_type pseudo_lld_bus = {
4072 .name = "pseudo",
4073 .match = pseudo_lld_bus_match,
4074 .probe = sdebug_driver_probe,
4075 .remove = sdebug_driver_remove,
4076};
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#include <linux/debugfs.h>
45#include <linux/async.h>
46#include <linux/cleanup.h>
47
48#include <net/checksum.h>
49
50#include <linux/unaligned.h>
51
52#include <scsi/scsi.h>
53#include <scsi/scsi_cmnd.h>
54#include <scsi/scsi_device.h>
55#include <scsi/scsi_host.h>
56#include <scsi/scsicam.h>
57#include <scsi/scsi_eh.h>
58#include <scsi/scsi_tcq.h>
59#include <scsi/scsi_dbg.h>
60
61#include "sd.h"
62#include "scsi_logging.h"
63
64/* make sure inq_product_rev string corresponds to this version */
65#define SDEBUG_VERSION "0191" /* format to fit INQUIRY revision field */
66static const char *sdebug_version_date = "20210520";
67
68#define MY_NAME "scsi_debug"
69
70/* Additional Sense Code (ASC) */
71#define NO_ADDITIONAL_SENSE 0x0
72#define OVERLAP_ATOMIC_COMMAND_ASC 0x0
73#define OVERLAP_ATOMIC_COMMAND_ASCQ 0x23
74#define LOGICAL_UNIT_NOT_READY 0x4
75#define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
76#define UNRECOVERED_READ_ERR 0x11
77#define PARAMETER_LIST_LENGTH_ERR 0x1a
78#define INVALID_OPCODE 0x20
79#define LBA_OUT_OF_RANGE 0x21
80#define INVALID_FIELD_IN_CDB 0x24
81#define INVALID_FIELD_IN_PARAM_LIST 0x26
82#define WRITE_PROTECTED 0x27
83#define UA_RESET_ASC 0x29
84#define UA_CHANGED_ASC 0x2a
85#define TARGET_CHANGED_ASC 0x3f
86#define LUNS_CHANGED_ASCQ 0x0e
87#define INSUFF_RES_ASC 0x55
88#define INSUFF_RES_ASCQ 0x3
89#define POWER_ON_RESET_ASCQ 0x0
90#define POWER_ON_OCCURRED_ASCQ 0x1
91#define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */
92#define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */
93#define CAPACITY_CHANGED_ASCQ 0x9
94#define SAVING_PARAMS_UNSUP 0x39
95#define TRANSPORT_PROBLEM 0x4b
96#define THRESHOLD_EXCEEDED 0x5d
97#define LOW_POWER_COND_ON 0x5e
98#define MISCOMPARE_VERIFY_ASC 0x1d
99#define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */
100#define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16
101#define WRITE_ERROR_ASC 0xc
102#define UNALIGNED_WRITE_ASCQ 0x4
103#define WRITE_BOUNDARY_ASCQ 0x5
104#define READ_INVDATA_ASCQ 0x6
105#define READ_BOUNDARY_ASCQ 0x7
106#define ATTEMPT_ACCESS_GAP 0x9
107#define INSUFF_ZONE_ASCQ 0xe
108/* see drivers/scsi/sense_codes.h */
109
110/* Additional Sense Code Qualifier (ASCQ) */
111#define ACK_NAK_TO 0x3
112
113/* Default values for driver parameters */
114#define DEF_NUM_HOST 1
115#define DEF_NUM_TGTS 1
116#define DEF_MAX_LUNS 1
117/* With these defaults, this driver will make 1 host with 1 target
118 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
119 */
120#define DEF_ATO 1
121#define DEF_CDB_LEN 10
122#define DEF_JDELAY 1 /* if > 0 unit is a jiffy */
123#define DEF_DEV_SIZE_PRE_INIT 0
124#define DEF_DEV_SIZE_MB 8
125#define DEF_ZBC_DEV_SIZE_MB 128
126#define DEF_DIF 0
127#define DEF_DIX 0
128#define DEF_PER_HOST_STORE false
129#define DEF_D_SENSE 0
130#define DEF_EVERY_NTH 0
131#define DEF_FAKE_RW 0
132#define DEF_GUARD 0
133#define DEF_HOST_LOCK 0
134#define DEF_LBPU 0
135#define DEF_LBPWS 0
136#define DEF_LBPWS10 0
137#define DEF_LBPRZ 1
138#define DEF_LOWEST_ALIGNED 0
139#define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */
140#define DEF_NO_LUN_0 0
141#define DEF_NUM_PARTS 0
142#define DEF_OPTS 0
143#define DEF_OPT_BLKS 1024
144#define DEF_PHYSBLK_EXP 0
145#define DEF_OPT_XFERLEN_EXP 0
146#define DEF_PTYPE TYPE_DISK
147#define DEF_RANDOM false
148#define DEF_REMOVABLE false
149#define DEF_SCSI_LEVEL 7 /* INQUIRY, byte2 [6->SPC-4; 7->SPC-5] */
150#define DEF_SECTOR_SIZE 512
151#define DEF_UNMAP_ALIGNMENT 0
152#define DEF_UNMAP_GRANULARITY 1
153#define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
154#define DEF_UNMAP_MAX_DESC 256
155#define DEF_VIRTUAL_GB 0
156#define DEF_VPD_USE_HOSTNO 1
157#define DEF_WRITESAME_LENGTH 0xFFFF
158#define DEF_ATOMIC_WR 0
159#define DEF_ATOMIC_WR_MAX_LENGTH 8192
160#define DEF_ATOMIC_WR_ALIGN 2
161#define DEF_ATOMIC_WR_GRAN 2
162#define DEF_ATOMIC_WR_MAX_LENGTH_BNDRY (DEF_ATOMIC_WR_MAX_LENGTH)
163#define DEF_ATOMIC_WR_MAX_BNDRY 128
164#define DEF_STRICT 0
165#define DEF_STATISTICS false
166#define DEF_SUBMIT_QUEUES 1
167#define DEF_TUR_MS_TO_READY 0
168#define DEF_UUID_CTL 0
169#define JDELAY_OVERRIDDEN -9999
170
171/* Default parameters for ZBC drives */
172#define DEF_ZBC_ZONE_SIZE_MB 128
173#define DEF_ZBC_MAX_OPEN_ZONES 8
174#define DEF_ZBC_NR_CONV_ZONES 1
175
176#define SDEBUG_LUN_0_VAL 0
177
178/* bit mask values for sdebug_opts */
179#define SDEBUG_OPT_NOISE 1
180#define SDEBUG_OPT_MEDIUM_ERR 2
181#define SDEBUG_OPT_TIMEOUT 4
182#define SDEBUG_OPT_RECOVERED_ERR 8
183#define SDEBUG_OPT_TRANSPORT_ERR 16
184#define SDEBUG_OPT_DIF_ERR 32
185#define SDEBUG_OPT_DIX_ERR 64
186#define SDEBUG_OPT_MAC_TIMEOUT 128
187#define SDEBUG_OPT_SHORT_TRANSFER 0x100
188#define SDEBUG_OPT_Q_NOISE 0x200
189#define SDEBUG_OPT_ALL_TSF 0x400 /* ignore */
190#define SDEBUG_OPT_RARE_TSF 0x800
191#define SDEBUG_OPT_N_WCE 0x1000
192#define SDEBUG_OPT_RESET_NOISE 0x2000
193#define SDEBUG_OPT_NO_CDB_NOISE 0x4000
194#define SDEBUG_OPT_HOST_BUSY 0x8000
195#define SDEBUG_OPT_CMD_ABORT 0x10000
196#define SDEBUG_OPT_ALL_NOISE (SDEBUG_OPT_NOISE | SDEBUG_OPT_Q_NOISE | \
197 SDEBUG_OPT_RESET_NOISE)
198#define SDEBUG_OPT_ALL_INJECTING (SDEBUG_OPT_RECOVERED_ERR | \
199 SDEBUG_OPT_TRANSPORT_ERR | \
200 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR | \
201 SDEBUG_OPT_SHORT_TRANSFER | \
202 SDEBUG_OPT_HOST_BUSY | \
203 SDEBUG_OPT_CMD_ABORT)
204#define SDEBUG_OPT_RECOV_DIF_DIX (SDEBUG_OPT_RECOVERED_ERR | \
205 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR)
206
207/* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs) are returned in
208 * priority order. In the subset implemented here lower numbers have higher
209 * priority. The UA numbers should be a sequence starting from 0 with
210 * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */
211#define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */
212#define SDEBUG_UA_POOCCUR 1 /* Power on occurred */
213#define SDEBUG_UA_BUS_RESET 2
214#define SDEBUG_UA_MODE_CHANGED 3
215#define SDEBUG_UA_CAPACITY_CHANGED 4
216#define SDEBUG_UA_LUNS_CHANGED 5
217#define SDEBUG_UA_MICROCODE_CHANGED 6 /* simulate firmware change */
218#define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 7
219#define SDEBUG_NUM_UAS 8
220
221/* when 1==SDEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
222 * sector on read commands: */
223#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
224#define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
225
226/* SDEBUG_CANQUEUE is the maximum number of commands that can be queued
227 * (for response) per submit queue at one time. Can be reduced by max_queue
228 * option. Command responses are not queued when jdelay=0 and ndelay=0. The
229 * per-device DEF_CMD_PER_LUN can be changed via sysfs:
230 * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth
231 * but cannot exceed SDEBUG_CANQUEUE .
232 */
233#define SDEBUG_CANQUEUE_WORDS 3 /* a WORD is bits in a long */
234#define SDEBUG_CANQUEUE (SDEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
235#define DEF_CMD_PER_LUN SDEBUG_CANQUEUE
236
237/* UA - Unit Attention; SA - Service Action; SSU - Start Stop Unit */
238#define F_D_IN 1 /* Data-in command (e.g. READ) */
239#define F_D_OUT 2 /* Data-out command (e.g. WRITE) */
240#define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */
241#define F_D_UNKN 8
242#define F_RL_WLUN_OK 0x10 /* allowed with REPORT LUNS W-LUN */
243#define F_SKIP_UA 0x20 /* bypass UAs (e.g. INQUIRY command) */
244#define F_DELAY_OVERR 0x40 /* for commands like INQUIRY */
245#define F_SA_LOW 0x80 /* SA is in cdb byte 1, bits 4 to 0 */
246#define F_SA_HIGH 0x100 /* SA is in cdb bytes 8 and 9 */
247#define F_INV_OP 0x200 /* invalid opcode (not supported) */
248#define F_FAKE_RW 0x400 /* bypass resp_*() when fake_rw set */
249#define F_M_ACCESS 0x800 /* media access, reacts to SSU state */
250#define F_SSU_DELAY 0x1000 /* SSU command delay (long-ish) */
251#define F_SYNC_DELAY 0x2000 /* SYNCHRONIZE CACHE delay */
252
253/* Useful combinations of the above flags */
254#define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR)
255#define FF_MEDIA_IO (F_M_ACCESS | F_FAKE_RW)
256#define FF_SA (F_SA_HIGH | F_SA_LOW)
257#define F_LONG_DELAY (F_SSU_DELAY | F_SYNC_DELAY)
258
259#define SDEBUG_MAX_PARTS 4
260
261#define SDEBUG_MAX_CMD_LEN 32
262
263#define SDEB_XA_NOT_IN_USE XA_MARK_1
264
265static struct kmem_cache *queued_cmd_cache;
266
267#define TO_QUEUED_CMD(scmd) ((void *)(scmd)->host_scribble)
268#define ASSIGN_QUEUED_CMD(scmnd, qc) { (scmnd)->host_scribble = (void *) qc; }
269
270/* Zone types (zbcr05 table 25) */
271enum sdebug_z_type {
272 ZBC_ZTYPE_CNV = 0x1,
273 ZBC_ZTYPE_SWR = 0x2,
274 ZBC_ZTYPE_SWP = 0x3,
275 /* ZBC_ZTYPE_SOBR = 0x4, */
276 ZBC_ZTYPE_GAP = 0x5,
277};
278
279/* enumeration names taken from table 26, zbcr05 */
280enum sdebug_z_cond {
281 ZBC_NOT_WRITE_POINTER = 0x0,
282 ZC1_EMPTY = 0x1,
283 ZC2_IMPLICIT_OPEN = 0x2,
284 ZC3_EXPLICIT_OPEN = 0x3,
285 ZC4_CLOSED = 0x4,
286 ZC6_READ_ONLY = 0xd,
287 ZC5_FULL = 0xe,
288 ZC7_OFFLINE = 0xf,
289};
290
291struct sdeb_zone_state { /* ZBC: per zone state */
292 enum sdebug_z_type z_type;
293 enum sdebug_z_cond z_cond;
294 bool z_non_seq_resource;
295 unsigned int z_size;
296 sector_t z_start;
297 sector_t z_wp;
298};
299
300enum sdebug_err_type {
301 ERR_TMOUT_CMD = 0, /* make specific scsi command timeout */
302 ERR_FAIL_QUEUE_CMD = 1, /* make specific scsi command's */
303 /* queuecmd return failed */
304 ERR_FAIL_CMD = 2, /* make specific scsi command's */
305 /* queuecmd return succeed but */
306 /* with errors set in scsi_cmnd */
307 ERR_ABORT_CMD_FAILED = 3, /* control return FAILED from */
308 /* scsi_debug_abort() */
309 ERR_LUN_RESET_FAILED = 4, /* control return FAILED from */
310 /* scsi_debug_device_reseLUN_RESET_FAILEDt() */
311};
312
313struct sdebug_err_inject {
314 int type;
315 struct list_head list;
316 int cnt;
317 unsigned char cmd;
318 struct rcu_head rcu;
319
320 union {
321 /*
322 * For ERR_FAIL_QUEUE_CMD
323 */
324 int queuecmd_ret;
325
326 /*
327 * For ERR_FAIL_CMD
328 */
329 struct {
330 unsigned char host_byte;
331 unsigned char driver_byte;
332 unsigned char status_byte;
333 unsigned char sense_key;
334 unsigned char asc;
335 unsigned char asq;
336 };
337 };
338};
339
340struct sdebug_dev_info {
341 struct list_head dev_list;
342 unsigned int channel;
343 unsigned int target;
344 u64 lun;
345 uuid_t lu_name;
346 struct sdebug_host_info *sdbg_host;
347 unsigned long uas_bm[1];
348 atomic_t stopped; /* 1: by SSU, 2: device start */
349 bool used;
350
351 /* For ZBC devices */
352 bool zoned;
353 unsigned int zcap;
354 unsigned int zsize;
355 unsigned int zsize_shift;
356 unsigned int nr_zones;
357 unsigned int nr_conv_zones;
358 unsigned int nr_seq_zones;
359 unsigned int nr_imp_open;
360 unsigned int nr_exp_open;
361 unsigned int nr_closed;
362 unsigned int max_open;
363 ktime_t create_ts; /* time since bootup that this device was created */
364 struct sdeb_zone_state *zstate;
365
366 struct dentry *debugfs_entry;
367 struct spinlock list_lock;
368 struct list_head inject_err_list;
369};
370
371struct sdebug_target_info {
372 bool reset_fail;
373 struct dentry *debugfs_entry;
374};
375
376struct sdebug_host_info {
377 struct list_head host_list;
378 int si_idx; /* sdeb_store_info (per host) xarray index */
379 struct Scsi_Host *shost;
380 struct device dev;
381 struct list_head dev_info_list;
382};
383
384/* There is an xarray of pointers to this struct's objects, one per host */
385struct sdeb_store_info {
386 rwlock_t macc_data_lck; /* for media data access on this store */
387 rwlock_t macc_meta_lck; /* for atomic media meta access on this store */
388 rwlock_t macc_sector_lck; /* per-sector media data access on this store */
389 u8 *storep; /* user data storage (ram) */
390 struct t10_pi_tuple *dif_storep; /* protection info */
391 void *map_storep; /* provisioning map */
392};
393
394#define dev_to_sdebug_host(d) \
395 container_of(d, struct sdebug_host_info, dev)
396
397#define shost_to_sdebug_host(shost) \
398 dev_to_sdebug_host(shost->dma_dev)
399
400enum sdeb_defer_type {SDEB_DEFER_NONE = 0, SDEB_DEFER_HRT = 1,
401 SDEB_DEFER_WQ = 2, SDEB_DEFER_POLL = 3};
402
403struct sdebug_defer {
404 struct hrtimer hrt;
405 struct execute_work ew;
406 ktime_t cmpl_ts;/* time since boot to complete this cmd */
407 int issuing_cpu;
408 bool aborted; /* true when blk_abort_request() already called */
409 enum sdeb_defer_type defer_t;
410};
411
412struct sdebug_device_access_info {
413 bool atomic_write;
414 u64 lba;
415 u32 num;
416 struct scsi_cmnd *self;
417};
418
419struct sdebug_queued_cmd {
420 /* corresponding bit set in in_use_bm[] in owning struct sdebug_queue
421 * instance indicates this slot is in use.
422 */
423 struct sdebug_defer sd_dp;
424 struct scsi_cmnd *scmd;
425 struct sdebug_device_access_info *i;
426};
427
428struct sdebug_scsi_cmd {
429 spinlock_t lock;
430};
431
432static atomic_t sdebug_cmnd_count; /* number of incoming commands */
433static atomic_t sdebug_completions; /* count of deferred completions */
434static atomic_t sdebug_miss_cpus; /* submission + completion cpus differ */
435static atomic_t sdebug_a_tsf; /* 'almost task set full' counter */
436static atomic_t sdeb_inject_pending;
437static atomic_t sdeb_mq_poll_count; /* bumped when mq_poll returns > 0 */
438
439struct opcode_info_t {
440 u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff */
441 /* for terminating element */
442 u8 opcode; /* if num_attached > 0, preferred */
443 u16 sa; /* service action */
444 u32 flags; /* OR-ed set of SDEB_F_* */
445 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
446 const struct opcode_info_t *arrp; /* num_attached elements or NULL */
447 u8 len_mask[16]; /* len_mask[0]-->cdb_len, then mask for cdb */
448 /* 1 to min(cdb_len, 15); ignore cdb[15...] */
449};
450
451/* SCSI opcodes (first byte of cdb) of interest mapped onto these indexes */
452enum sdeb_opcode_index {
453 SDEB_I_INVALID_OPCODE = 0,
454 SDEB_I_INQUIRY = 1,
455 SDEB_I_REPORT_LUNS = 2,
456 SDEB_I_REQUEST_SENSE = 3,
457 SDEB_I_TEST_UNIT_READY = 4,
458 SDEB_I_MODE_SENSE = 5, /* 6, 10 */
459 SDEB_I_MODE_SELECT = 6, /* 6, 10 */
460 SDEB_I_LOG_SENSE = 7,
461 SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */
462 SDEB_I_READ = 9, /* 6, 10, 12, 16 */
463 SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */
464 SDEB_I_START_STOP = 11,
465 SDEB_I_SERV_ACT_IN_16 = 12, /* add ...SERV_ACT_IN_12 if needed */
466 SDEB_I_SERV_ACT_OUT_16 = 13, /* add ...SERV_ACT_OUT_12 if needed */
467 SDEB_I_MAINT_IN = 14,
468 SDEB_I_MAINT_OUT = 15,
469 SDEB_I_VERIFY = 16, /* VERIFY(10), VERIFY(16) */
470 SDEB_I_VARIABLE_LEN = 17, /* READ(32), WRITE(32), WR_SCAT(32) */
471 SDEB_I_RESERVE = 18, /* 6, 10 */
472 SDEB_I_RELEASE = 19, /* 6, 10 */
473 SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
474 SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */
475 SDEB_I_ATA_PT = 22, /* 12, 16 */
476 SDEB_I_SEND_DIAG = 23,
477 SDEB_I_UNMAP = 24,
478 SDEB_I_WRITE_BUFFER = 25,
479 SDEB_I_WRITE_SAME = 26, /* 10, 16 */
480 SDEB_I_SYNC_CACHE = 27, /* 10, 16 */
481 SDEB_I_COMP_WRITE = 28,
482 SDEB_I_PRE_FETCH = 29, /* 10, 16 */
483 SDEB_I_ZONE_OUT = 30, /* 0x94+SA; includes no data xfer */
484 SDEB_I_ZONE_IN = 31, /* 0x95+SA; all have data-in */
485 SDEB_I_ATOMIC_WRITE_16 = 32,
486 SDEB_I_LAST_ELEM_P1 = 33, /* keep this last (previous + 1) */
487};
488
489
490static const unsigned char opcode_ind_arr[256] = {
491/* 0x0; 0x0->0x1f: 6 byte cdbs */
492 SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE,
493 0, 0, 0, 0,
494 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0,
495 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
496 SDEB_I_RELEASE,
497 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG,
498 SDEB_I_ALLOW_REMOVAL, 0,
499/* 0x20; 0x20->0x3f: 10 byte cdbs */
500 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0,
501 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY,
502 0, 0, 0, 0, SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, 0,
503 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0,
504/* 0x40; 0x40->0x5f: 10 byte cdbs */
505 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0,
506 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0,
507 0, 0, 0, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
508 SDEB_I_RELEASE,
509 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0,
510/* 0x60; 0x60->0x7d are reserved, 0x7e is "extended cdb" */
511 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
512 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
513 0, SDEB_I_VARIABLE_LEN,
514/* 0x80; 0x80->0x9f: 16 byte cdbs */
515 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0,
516 SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0,
517 0, 0, 0, SDEB_I_VERIFY,
518 SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, SDEB_I_WRITE_SAME,
519 SDEB_I_ZONE_OUT, SDEB_I_ZONE_IN, 0, 0,
520 0, 0, 0, 0,
521 SDEB_I_ATOMIC_WRITE_16, 0, SDEB_I_SERV_ACT_IN_16, SDEB_I_SERV_ACT_OUT_16,
522/* 0xa0; 0xa0->0xbf: 12 byte cdbs */
523 SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN,
524 SDEB_I_MAINT_OUT, 0, 0, 0,
525 SDEB_I_READ, 0 /* SDEB_I_SERV_ACT_OUT_12 */, SDEB_I_WRITE,
526 0 /* SDEB_I_SERV_ACT_IN_12 */, 0, 0, 0, 0,
527 0, 0, 0, 0, 0, 0, 0, 0,
528 0, 0, 0, 0, 0, 0, 0, 0,
529/* 0xc0; 0xc0->0xff: vendor specific */
530 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
531 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
532 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
533 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
534};
535
536/*
537 * The following "response" functions return the SCSI mid-level's 4 byte
538 * tuple-in-an-int. To handle commands with an IMMED bit, for a faster
539 * command completion, they can mask their return value with
540 * SDEG_RES_IMMED_MASK .
541 */
542#define SDEG_RES_IMMED_MASK 0x40000000
543
544static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *);
545static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *);
546static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *);
547static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
548static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *);
549static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
550static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
551static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
552static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
553static int resp_write_scat(struct scsi_cmnd *, struct sdebug_dev_info *);
554static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
555static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
556static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
557static int resp_get_stream_status(struct scsi_cmnd *scp,
558 struct sdebug_dev_info *devip);
559static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *);
560static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *);
561static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *);
562static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *);
563static int resp_verify(struct scsi_cmnd *, struct sdebug_dev_info *);
564static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *);
565static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *);
566static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
567static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *);
568static int resp_sync_cache(struct scsi_cmnd *, struct sdebug_dev_info *);
569static int resp_pre_fetch(struct scsi_cmnd *, struct sdebug_dev_info *);
570static int resp_report_zones(struct scsi_cmnd *, struct sdebug_dev_info *);
571static int resp_atomic_write(struct scsi_cmnd *, struct sdebug_dev_info *);
572static int resp_open_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
573static int resp_close_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
574static int resp_finish_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
575static int resp_rwp_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
576
577static int sdebug_do_add_host(bool mk_new_store);
578static int sdebug_add_host_helper(int per_host_idx);
579static void sdebug_do_remove_host(bool the_end);
580static int sdebug_add_store(void);
581static void sdebug_erase_store(int idx, struct sdeb_store_info *sip);
582static void sdebug_erase_all_stores(bool apart_from_first);
583
584static void sdebug_free_queued_cmd(struct sdebug_queued_cmd *sqcp);
585
586/*
587 * The following are overflow arrays for cdbs that "hit" the same index in
588 * the opcode_info_arr array. The most time sensitive (or commonly used) cdb
589 * should be placed in opcode_info_arr[], the others should be placed here.
590 */
591static const struct opcode_info_t msense_iarr[] = {
592 {0, 0x1a, 0, F_D_IN, NULL, NULL,
593 {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
594};
595
596static const struct opcode_info_t mselect_iarr[] = {
597 {0, 0x15, 0, F_D_OUT, NULL, NULL,
598 {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
599};
600
601static const struct opcode_info_t read_iarr[] = {
602 {0, 0x28, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(10) */
603 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
604 0, 0, 0, 0} },
605 {0, 0x8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL, /* READ(6) */
606 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
607 {0, 0xa8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(12) */
608 {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf,
609 0xc7, 0, 0, 0, 0} },
610};
611
612static const struct opcode_info_t write_iarr[] = {
613 {0, 0x2a, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(10) */
614 NULL, {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7,
615 0, 0, 0, 0, 0, 0} },
616 {0, 0xa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(6) */
617 NULL, {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0,
618 0, 0, 0} },
619 {0, 0xaa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(12) */
620 NULL, {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
621 0xbf, 0xc7, 0, 0, 0, 0} },
622};
623
624static const struct opcode_info_t verify_iarr[] = {
625 {0, 0x2f, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify,/* VERIFY(10) */
626 NULL, {10, 0xf7, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xff, 0xff, 0xc7,
627 0, 0, 0, 0, 0, 0} },
628};
629
630static const struct opcode_info_t sa_in_16_iarr[] = {
631 {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL,
632 {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
633 0xff, 0xff, 0xff, 0, 0xc7} }, /* GET LBA STATUS(16) */
634 {0, 0x9e, 0x16, F_SA_LOW | F_D_IN, resp_get_stream_status, NULL,
635 {16, 0x16, 0, 0, 0xff, 0xff, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff,
636 0, 0} }, /* GET STREAM STATUS */
637};
638
639static const struct opcode_info_t vl_iarr[] = { /* VARIABLE LENGTH */
640 {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_dt0,
641 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0xb, 0xfa,
642 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
643 {0, 0x7f, 0x11, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
644 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x11, 0xf8,
645 0, 0xff, 0xff, 0x0, 0x0} }, /* WRITE SCATTERED(32) */
646};
647
648static const struct opcode_info_t maint_in_iarr[] = { /* MAINT IN */
649 {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL,
650 {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
651 0xc7, 0, 0, 0, 0} }, /* REPORT SUPPORTED OPERATION CODES */
652 {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL,
653 {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
654 0, 0} }, /* REPORTED SUPPORTED TASK MANAGEMENT FUNCTIONS */
655};
656
657static const struct opcode_info_t write_same_iarr[] = {
658 {0, 0x93, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_write_same_16, NULL,
659 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
660 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* WRITE SAME(16) */
661};
662
663static const struct opcode_info_t reserve_iarr[] = {
664 {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */
665 {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
666};
667
668static const struct opcode_info_t release_iarr[] = {
669 {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */
670 {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
671};
672
673static const struct opcode_info_t sync_cache_iarr[] = {
674 {0, 0x91, 0, F_SYNC_DELAY | F_M_ACCESS, resp_sync_cache, NULL,
675 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
676 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* SYNC_CACHE (16) */
677};
678
679static const struct opcode_info_t pre_fetch_iarr[] = {
680 {0, 0x90, 0, F_SYNC_DELAY | FF_MEDIA_IO, resp_pre_fetch, NULL,
681 {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
682 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* PRE-FETCH (16) */
683};
684
685static const struct opcode_info_t zone_out_iarr[] = { /* ZONE OUT(16) */
686 {0, 0x94, 0x1, F_SA_LOW | F_M_ACCESS, resp_close_zone, NULL,
687 {16, 0x1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
688 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* CLOSE ZONE */
689 {0, 0x94, 0x2, F_SA_LOW | F_M_ACCESS, resp_finish_zone, NULL,
690 {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
691 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* FINISH ZONE */
692 {0, 0x94, 0x4, F_SA_LOW | F_M_ACCESS, resp_rwp_zone, NULL,
693 {16, 0x4, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
694 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* RESET WRITE POINTER */
695};
696
697static const struct opcode_info_t zone_in_iarr[] = { /* ZONE IN(16) */
698 {0, 0x95, 0x6, F_SA_LOW | F_D_IN | F_M_ACCESS, NULL, NULL,
699 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
700 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* REPORT ZONES */
701};
702
703
704/* This array is accessed via SDEB_I_* values. Make sure all are mapped,
705 * plus the terminating elements for logic that scans this table such as
706 * REPORT SUPPORTED OPERATION CODES. */
707static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEM_P1 + 1] = {
708/* 0 */
709 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* unknown opcodes */
710 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
711 {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL, /* INQUIRY */
712 {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
713 {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL,
714 {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
715 0, 0} }, /* REPORT LUNS */
716 {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL,
717 {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
718 {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */
719 {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
720/* 5 */
721 {ARRAY_SIZE(msense_iarr), 0x5a, 0, F_D_IN, /* MODE SENSE(10) */
722 resp_mode_sense, msense_iarr, {10, 0xf8, 0xff, 0xff, 0, 0, 0,
723 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
724 {ARRAY_SIZE(mselect_iarr), 0x55, 0, F_D_OUT, /* MODE SELECT(10) */
725 resp_mode_select, mselect_iarr, {10, 0xf1, 0, 0, 0, 0, 0, 0xff,
726 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
727 {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL, /* LOG SENSE */
728 {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0,
729 0, 0, 0} },
730 {0, 0x25, 0, F_D_IN, resp_readcap, NULL, /* READ CAPACITY(10) */
731 {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0,
732 0, 0} },
733 {ARRAY_SIZE(read_iarr), 0x88, 0, F_D_IN | FF_MEDIA_IO, /* READ(16) */
734 resp_read_dt0, read_iarr, {16, 0xfe, 0xff, 0xff, 0xff, 0xff,
735 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
736/* 10 */
737 {ARRAY_SIZE(write_iarr), 0x8a, 0, F_D_OUT | FF_MEDIA_IO,
738 resp_write_dt0, write_iarr, /* WRITE(16) */
739 {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
740 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
741 {0, 0x1b, 0, F_SSU_DELAY, resp_start_stop, NULL,/* START STOP UNIT */
742 {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
743 {ARRAY_SIZE(sa_in_16_iarr), 0x9e, 0x10, F_SA_LOW | F_D_IN,
744 resp_readcap16, sa_in_16_iarr, /* SA_IN(16), READ CAPACITY(16) */
745 {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
746 0xff, 0xff, 0xff, 0xff, 0x1, 0xc7} },
747 {0, 0x9f, 0x12, F_SA_LOW | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
748 NULL, {16, 0x12, 0xf9, 0x0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff,
749 0xff, 0xff, 0xff, 0xff, 0xc7} }, /* SA_OUT(16), WRITE SCAT(16) */
750 {ARRAY_SIZE(maint_in_iarr), 0xa3, 0xa, F_SA_LOW | F_D_IN,
751 resp_report_tgtpgs, /* MAINT IN, REPORT TARGET PORT GROUPS */
752 maint_in_iarr, {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff,
753 0xff, 0, 0xc7, 0, 0, 0, 0} },
754/* 15 */
755 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */
756 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
757 {ARRAY_SIZE(verify_iarr), 0x8f, 0,
758 F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify, /* VERIFY(16) */
759 verify_iarr, {16, 0xf6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
760 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} },
761 {ARRAY_SIZE(vl_iarr), 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_MEDIA_IO,
762 resp_read_dt0, vl_iarr, /* VARIABLE LENGTH, READ(32) */
763 {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x9, 0xfe, 0, 0xff, 0xff,
764 0xff, 0xff} },
765 {ARRAY_SIZE(reserve_iarr), 0x56, 0, F_D_OUT,
766 NULL, reserve_iarr, /* RESERVE(10) <no response function> */
767 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
768 0} },
769 {ARRAY_SIZE(release_iarr), 0x57, 0, F_D_OUT,
770 NULL, release_iarr, /* RELEASE(10) <no response function> */
771 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
772 0} },
773/* 20 */
774 {0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */
775 {6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
776 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */
777 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
778 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */
779 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
780 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */
781 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
782 {0, 0x42, 0, F_D_OUT | FF_MEDIA_IO, resp_unmap, NULL, /* UNMAP */
783 {10, 0x1, 0, 0, 0, 0, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
784/* 25 */
785 {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL,
786 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0,
787 0, 0, 0, 0} }, /* WRITE_BUFFER */
788 {ARRAY_SIZE(write_same_iarr), 0x41, 0, F_D_OUT_MAYBE | FF_MEDIA_IO,
789 resp_write_same_10, write_same_iarr, /* WRITE SAME(10) */
790 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0,
791 0, 0, 0, 0, 0} },
792 {ARRAY_SIZE(sync_cache_iarr), 0x35, 0, F_SYNC_DELAY | F_M_ACCESS,
793 resp_sync_cache, sync_cache_iarr,
794 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
795 0, 0, 0, 0} }, /* SYNC_CACHE (10) */
796 {0, 0x89, 0, F_D_OUT | FF_MEDIA_IO, resp_comp_write, NULL,
797 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
798 0, 0xff, 0x3f, 0xc7} }, /* COMPARE AND WRITE */
799 {ARRAY_SIZE(pre_fetch_iarr), 0x34, 0, F_SYNC_DELAY | FF_MEDIA_IO,
800 resp_pre_fetch, pre_fetch_iarr,
801 {10, 0x2, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
802 0, 0, 0, 0} }, /* PRE-FETCH (10) */
803
804/* 30 */
805 {ARRAY_SIZE(zone_out_iarr), 0x94, 0x3, F_SA_LOW | F_M_ACCESS,
806 resp_open_zone, zone_out_iarr, /* ZONE_OUT(16), OPEN ZONE) */
807 {16, 0x3 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
808 0xff, 0xff, 0x0, 0x0, 0xff, 0xff, 0x1, 0xc7} },
809 {ARRAY_SIZE(zone_in_iarr), 0x95, 0x0, F_SA_LOW | F_M_ACCESS,
810 resp_report_zones, zone_in_iarr, /* ZONE_IN(16), REPORT ZONES) */
811 {16, 0x0 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
812 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xc7} },
813/* 31 */
814 {0, 0x0, 0x0, F_D_OUT | FF_MEDIA_IO,
815 resp_atomic_write, NULL, /* ATOMIC WRITE 16 */
816 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
817 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff} },
818/* sentinel */
819 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */
820 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
821};
822
823static int sdebug_num_hosts;
824static int sdebug_add_host = DEF_NUM_HOST; /* in sysfs this is relative */
825static int sdebug_ato = DEF_ATO;
826static int sdebug_cdb_len = DEF_CDB_LEN;
827static int sdebug_jdelay = DEF_JDELAY; /* if > 0 then unit is jiffies */
828static int sdebug_dev_size_mb = DEF_DEV_SIZE_PRE_INIT;
829static int sdebug_dif = DEF_DIF;
830static int sdebug_dix = DEF_DIX;
831static int sdebug_dsense = DEF_D_SENSE;
832static int sdebug_every_nth = DEF_EVERY_NTH;
833static int sdebug_fake_rw = DEF_FAKE_RW;
834static unsigned int sdebug_guard = DEF_GUARD;
835static int sdebug_host_max_queue; /* per host */
836static int sdebug_lowest_aligned = DEF_LOWEST_ALIGNED;
837static int sdebug_max_luns = DEF_MAX_LUNS;
838static int sdebug_max_queue = SDEBUG_CANQUEUE; /* per submit queue */
839static unsigned int sdebug_medium_error_start = OPT_MEDIUM_ERR_ADDR;
840static int sdebug_medium_error_count = OPT_MEDIUM_ERR_NUM;
841static int sdebug_ndelay = DEF_NDELAY; /* if > 0 then unit is nanoseconds */
842static int sdebug_no_lun_0 = DEF_NO_LUN_0;
843static int sdebug_no_uld;
844static int sdebug_num_parts = DEF_NUM_PARTS;
845static int sdebug_num_tgts = DEF_NUM_TGTS; /* targets per host */
846static int sdebug_opt_blks = DEF_OPT_BLKS;
847static int sdebug_opts = DEF_OPTS;
848static int sdebug_physblk_exp = DEF_PHYSBLK_EXP;
849static int sdebug_opt_xferlen_exp = DEF_OPT_XFERLEN_EXP;
850static int sdebug_ptype = DEF_PTYPE; /* SCSI peripheral device type */
851static int sdebug_scsi_level = DEF_SCSI_LEVEL;
852static int sdebug_sector_size = DEF_SECTOR_SIZE;
853static int sdeb_tur_ms_to_ready = DEF_TUR_MS_TO_READY;
854static int sdebug_virtual_gb = DEF_VIRTUAL_GB;
855static int sdebug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
856static unsigned int sdebug_lbpu = DEF_LBPU;
857static unsigned int sdebug_lbpws = DEF_LBPWS;
858static unsigned int sdebug_lbpws10 = DEF_LBPWS10;
859static unsigned int sdebug_lbprz = DEF_LBPRZ;
860static unsigned int sdebug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
861static unsigned int sdebug_unmap_granularity = DEF_UNMAP_GRANULARITY;
862static unsigned int sdebug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
863static unsigned int sdebug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
864static unsigned int sdebug_write_same_length = DEF_WRITESAME_LENGTH;
865static unsigned int sdebug_atomic_wr = DEF_ATOMIC_WR;
866static unsigned int sdebug_atomic_wr_max_length = DEF_ATOMIC_WR_MAX_LENGTH;
867static unsigned int sdebug_atomic_wr_align = DEF_ATOMIC_WR_ALIGN;
868static unsigned int sdebug_atomic_wr_gran = DEF_ATOMIC_WR_GRAN;
869static unsigned int sdebug_atomic_wr_max_length_bndry =
870 DEF_ATOMIC_WR_MAX_LENGTH_BNDRY;
871static unsigned int sdebug_atomic_wr_max_bndry = DEF_ATOMIC_WR_MAX_BNDRY;
872static int sdebug_uuid_ctl = DEF_UUID_CTL;
873static bool sdebug_random = DEF_RANDOM;
874static bool sdebug_per_host_store = DEF_PER_HOST_STORE;
875static bool sdebug_removable = DEF_REMOVABLE;
876static bool sdebug_clustering;
877static bool sdebug_host_lock = DEF_HOST_LOCK;
878static bool sdebug_strict = DEF_STRICT;
879static bool sdebug_any_injecting_opt;
880static bool sdebug_no_rwlock;
881static bool sdebug_verbose;
882static bool have_dif_prot;
883static bool write_since_sync;
884static bool sdebug_statistics = DEF_STATISTICS;
885static bool sdebug_wp;
886static bool sdebug_allow_restart;
887static enum {
888 BLK_ZONED_NONE = 0,
889 BLK_ZONED_HA = 1,
890 BLK_ZONED_HM = 2,
891} sdeb_zbc_model = BLK_ZONED_NONE;
892static char *sdeb_zbc_model_s;
893
894enum sam_lun_addr_method {SAM_LUN_AM_PERIPHERAL = 0x0,
895 SAM_LUN_AM_FLAT = 0x1,
896 SAM_LUN_AM_LOGICAL_UNIT = 0x2,
897 SAM_LUN_AM_EXTENDED = 0x3};
898static enum sam_lun_addr_method sdebug_lun_am = SAM_LUN_AM_PERIPHERAL;
899static int sdebug_lun_am_i = (int)SAM_LUN_AM_PERIPHERAL;
900
901static unsigned int sdebug_store_sectors;
902static sector_t sdebug_capacity; /* in sectors */
903
904/* old BIOS stuff, kernel may get rid of them but some mode sense pages
905 may still need them */
906static int sdebug_heads; /* heads per disk */
907static int sdebug_cylinders_per; /* cylinders per surface */
908static int sdebug_sectors_per; /* sectors per cylinder */
909
910static LIST_HEAD(sdebug_host_list);
911static DEFINE_MUTEX(sdebug_host_list_mutex);
912
913static struct xarray per_store_arr;
914static struct xarray *per_store_ap = &per_store_arr;
915static int sdeb_first_idx = -1; /* invalid index ==> none created */
916static int sdeb_most_recent_idx = -1;
917static DEFINE_RWLOCK(sdeb_fake_rw_lck); /* need a RW lock when fake_rw=1 */
918
919static unsigned long map_size;
920static int num_aborts;
921static int num_dev_resets;
922static int num_target_resets;
923static int num_bus_resets;
924static int num_host_resets;
925static int dix_writes;
926static int dix_reads;
927static int dif_errors;
928
929/* ZBC global data */
930static bool sdeb_zbc_in_use; /* true for host-aware and host-managed disks */
931static int sdeb_zbc_zone_cap_mb;
932static int sdeb_zbc_zone_size_mb;
933static int sdeb_zbc_max_open = DEF_ZBC_MAX_OPEN_ZONES;
934static int sdeb_zbc_nr_conv = DEF_ZBC_NR_CONV_ZONES;
935
936static int submit_queues = DEF_SUBMIT_QUEUES; /* > 1 for multi-queue (mq) */
937static int poll_queues; /* iouring iopoll interface.*/
938
939static atomic_long_t writes_by_group_number[64];
940
941static char sdebug_proc_name[] = MY_NAME;
942static const char *my_name = MY_NAME;
943
944static const struct bus_type pseudo_lld_bus;
945
946static struct device_driver sdebug_driverfs_driver = {
947 .name = sdebug_proc_name,
948 .bus = &pseudo_lld_bus,
949};
950
951static const int check_condition_result =
952 SAM_STAT_CHECK_CONDITION;
953
954static const int illegal_condition_result =
955 (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
956
957static const int device_qfull_result =
958 (DID_ABORT << 16) | SAM_STAT_TASK_SET_FULL;
959
960static const int condition_met_result = SAM_STAT_CONDITION_MET;
961
962static struct dentry *sdebug_debugfs_root;
963static ASYNC_DOMAIN_EXCLUSIVE(sdebug_async_domain);
964
965static void sdebug_err_free(struct rcu_head *head)
966{
967 struct sdebug_err_inject *inject =
968 container_of(head, typeof(*inject), rcu);
969
970 kfree(inject);
971}
972
973static void sdebug_err_add(struct scsi_device *sdev, struct sdebug_err_inject *new)
974{
975 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdev->hostdata;
976 struct sdebug_err_inject *err;
977
978 spin_lock(&devip->list_lock);
979 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
980 if (err->type == new->type && err->cmd == new->cmd) {
981 list_del_rcu(&err->list);
982 call_rcu(&err->rcu, sdebug_err_free);
983 }
984 }
985
986 list_add_tail_rcu(&new->list, &devip->inject_err_list);
987 spin_unlock(&devip->list_lock);
988}
989
990static int sdebug_err_remove(struct scsi_device *sdev, const char *buf, size_t count)
991{
992 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdev->hostdata;
993 struct sdebug_err_inject *err;
994 int type;
995 unsigned char cmd;
996
997 if (sscanf(buf, "- %d %hhx", &type, &cmd) != 2) {
998 kfree(buf);
999 return -EINVAL;
1000 }
1001
1002 spin_lock(&devip->list_lock);
1003 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
1004 if (err->type == type && err->cmd == cmd) {
1005 list_del_rcu(&err->list);
1006 call_rcu(&err->rcu, sdebug_err_free);
1007 spin_unlock(&devip->list_lock);
1008 kfree(buf);
1009 return count;
1010 }
1011 }
1012 spin_unlock(&devip->list_lock);
1013
1014 kfree(buf);
1015 return -EINVAL;
1016}
1017
1018static int sdebug_error_show(struct seq_file *m, void *p)
1019{
1020 struct scsi_device *sdev = (struct scsi_device *)m->private;
1021 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdev->hostdata;
1022 struct sdebug_err_inject *err;
1023
1024 seq_puts(m, "Type\tCount\tCommand\n");
1025
1026 rcu_read_lock();
1027 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
1028 switch (err->type) {
1029 case ERR_TMOUT_CMD:
1030 case ERR_ABORT_CMD_FAILED:
1031 case ERR_LUN_RESET_FAILED:
1032 seq_printf(m, "%d\t%d\t0x%x\n", err->type, err->cnt,
1033 err->cmd);
1034 break;
1035
1036 case ERR_FAIL_QUEUE_CMD:
1037 seq_printf(m, "%d\t%d\t0x%x\t0x%x\n", err->type,
1038 err->cnt, err->cmd, err->queuecmd_ret);
1039 break;
1040
1041 case ERR_FAIL_CMD:
1042 seq_printf(m, "%d\t%d\t0x%x\t0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1043 err->type, err->cnt, err->cmd,
1044 err->host_byte, err->driver_byte,
1045 err->status_byte, err->sense_key,
1046 err->asc, err->asq);
1047 break;
1048 }
1049 }
1050 rcu_read_unlock();
1051
1052 return 0;
1053}
1054
1055static int sdebug_error_open(struct inode *inode, struct file *file)
1056{
1057 return single_open(file, sdebug_error_show, inode->i_private);
1058}
1059
1060static ssize_t sdebug_error_write(struct file *file, const char __user *ubuf,
1061 size_t count, loff_t *ppos)
1062{
1063 char *buf;
1064 unsigned int inject_type;
1065 struct sdebug_err_inject *inject;
1066 struct scsi_device *sdev = (struct scsi_device *)file->f_inode->i_private;
1067
1068 buf = kzalloc(count + 1, GFP_KERNEL);
1069 if (!buf)
1070 return -ENOMEM;
1071
1072 if (copy_from_user(buf, ubuf, count)) {
1073 kfree(buf);
1074 return -EFAULT;
1075 }
1076
1077 if (buf[0] == '-')
1078 return sdebug_err_remove(sdev, buf, count);
1079
1080 if (sscanf(buf, "%d", &inject_type) != 1) {
1081 kfree(buf);
1082 return -EINVAL;
1083 }
1084
1085 inject = kzalloc(sizeof(struct sdebug_err_inject), GFP_KERNEL);
1086 if (!inject) {
1087 kfree(buf);
1088 return -ENOMEM;
1089 }
1090
1091 switch (inject_type) {
1092 case ERR_TMOUT_CMD:
1093 case ERR_ABORT_CMD_FAILED:
1094 case ERR_LUN_RESET_FAILED:
1095 if (sscanf(buf, "%d %d %hhx", &inject->type, &inject->cnt,
1096 &inject->cmd) != 3)
1097 goto out_error;
1098 break;
1099
1100 case ERR_FAIL_QUEUE_CMD:
1101 if (sscanf(buf, "%d %d %hhx %x", &inject->type, &inject->cnt,
1102 &inject->cmd, &inject->queuecmd_ret) != 4)
1103 goto out_error;
1104 break;
1105
1106 case ERR_FAIL_CMD:
1107 if (sscanf(buf, "%d %d %hhx %hhx %hhx %hhx %hhx %hhx %hhx",
1108 &inject->type, &inject->cnt, &inject->cmd,
1109 &inject->host_byte, &inject->driver_byte,
1110 &inject->status_byte, &inject->sense_key,
1111 &inject->asc, &inject->asq) != 9)
1112 goto out_error;
1113 break;
1114
1115 default:
1116 goto out_error;
1117 break;
1118 }
1119
1120 kfree(buf);
1121 sdebug_err_add(sdev, inject);
1122
1123 return count;
1124
1125out_error:
1126 kfree(buf);
1127 kfree(inject);
1128 return -EINVAL;
1129}
1130
1131static const struct file_operations sdebug_error_fops = {
1132 .open = sdebug_error_open,
1133 .read = seq_read,
1134 .write = sdebug_error_write,
1135 .release = single_release,
1136};
1137
1138static int sdebug_target_reset_fail_show(struct seq_file *m, void *p)
1139{
1140 struct scsi_target *starget = (struct scsi_target *)m->private;
1141 struct sdebug_target_info *targetip =
1142 (struct sdebug_target_info *)starget->hostdata;
1143
1144 if (targetip)
1145 seq_printf(m, "%c\n", targetip->reset_fail ? 'Y' : 'N');
1146
1147 return 0;
1148}
1149
1150static int sdebug_target_reset_fail_open(struct inode *inode, struct file *file)
1151{
1152 return single_open(file, sdebug_target_reset_fail_show, inode->i_private);
1153}
1154
1155static ssize_t sdebug_target_reset_fail_write(struct file *file,
1156 const char __user *ubuf, size_t count, loff_t *ppos)
1157{
1158 int ret;
1159 struct scsi_target *starget =
1160 (struct scsi_target *)file->f_inode->i_private;
1161 struct sdebug_target_info *targetip =
1162 (struct sdebug_target_info *)starget->hostdata;
1163
1164 if (targetip) {
1165 ret = kstrtobool_from_user(ubuf, count, &targetip->reset_fail);
1166 return ret < 0 ? ret : count;
1167 }
1168 return -ENODEV;
1169}
1170
1171static const struct file_operations sdebug_target_reset_fail_fops = {
1172 .open = sdebug_target_reset_fail_open,
1173 .read = seq_read,
1174 .write = sdebug_target_reset_fail_write,
1175 .release = single_release,
1176};
1177
1178static int sdebug_target_alloc(struct scsi_target *starget)
1179{
1180 struct sdebug_target_info *targetip;
1181
1182 targetip = kzalloc(sizeof(struct sdebug_target_info), GFP_KERNEL);
1183 if (!targetip)
1184 return -ENOMEM;
1185
1186 async_synchronize_full_domain(&sdebug_async_domain);
1187
1188 targetip->debugfs_entry = debugfs_create_dir(dev_name(&starget->dev),
1189 sdebug_debugfs_root);
1190
1191 debugfs_create_file("fail_reset", 0600, targetip->debugfs_entry, starget,
1192 &sdebug_target_reset_fail_fops);
1193
1194 starget->hostdata = targetip;
1195
1196 return 0;
1197}
1198
1199static void sdebug_tartget_cleanup_async(void *data, async_cookie_t cookie)
1200{
1201 struct sdebug_target_info *targetip = data;
1202
1203 debugfs_remove(targetip->debugfs_entry);
1204 kfree(targetip);
1205}
1206
1207static void sdebug_target_destroy(struct scsi_target *starget)
1208{
1209 struct sdebug_target_info *targetip;
1210
1211 targetip = (struct sdebug_target_info *)starget->hostdata;
1212 if (targetip) {
1213 starget->hostdata = NULL;
1214 async_schedule_domain(sdebug_tartget_cleanup_async, targetip,
1215 &sdebug_async_domain);
1216 }
1217}
1218
1219/* Only do the extra work involved in logical block provisioning if one or
1220 * more of the lbpu, lbpws or lbpws10 parameters are given and we are doing
1221 * real reads and writes (i.e. not skipping them for speed).
1222 */
1223static inline bool scsi_debug_lbp(void)
1224{
1225 return 0 == sdebug_fake_rw &&
1226 (sdebug_lbpu || sdebug_lbpws || sdebug_lbpws10);
1227}
1228
1229static inline bool scsi_debug_atomic_write(void)
1230{
1231 return sdebug_fake_rw == 0 && sdebug_atomic_wr;
1232}
1233
1234static void *lba2fake_store(struct sdeb_store_info *sip,
1235 unsigned long long lba)
1236{
1237 struct sdeb_store_info *lsip = sip;
1238
1239 lba = do_div(lba, sdebug_store_sectors);
1240 if (!sip || !sip->storep) {
1241 WARN_ON_ONCE(true);
1242 lsip = xa_load(per_store_ap, 0); /* should never be NULL */
1243 }
1244 return lsip->storep + lba * sdebug_sector_size;
1245}
1246
1247static struct t10_pi_tuple *dif_store(struct sdeb_store_info *sip,
1248 sector_t sector)
1249{
1250 sector = sector_div(sector, sdebug_store_sectors);
1251
1252 return sip->dif_storep + sector;
1253}
1254
1255static void sdebug_max_tgts_luns(void)
1256{
1257 struct sdebug_host_info *sdbg_host;
1258 struct Scsi_Host *hpnt;
1259
1260 mutex_lock(&sdebug_host_list_mutex);
1261 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
1262 hpnt = sdbg_host->shost;
1263 if ((hpnt->this_id >= 0) &&
1264 (sdebug_num_tgts > hpnt->this_id))
1265 hpnt->max_id = sdebug_num_tgts + 1;
1266 else
1267 hpnt->max_id = sdebug_num_tgts;
1268 /* sdebug_max_luns; */
1269 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
1270 }
1271 mutex_unlock(&sdebug_host_list_mutex);
1272}
1273
1274enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
1275
1276/* Set in_bit to -1 to indicate no bit position of invalid field */
1277static void mk_sense_invalid_fld(struct scsi_cmnd *scp,
1278 enum sdeb_cmd_data c_d,
1279 int in_byte, int in_bit)
1280{
1281 unsigned char *sbuff;
1282 u8 sks[4];
1283 int sl, asc;
1284
1285 sbuff = scp->sense_buffer;
1286 if (!sbuff) {
1287 sdev_printk(KERN_ERR, scp->device,
1288 "%s: sense_buffer is NULL\n", __func__);
1289 return;
1290 }
1291 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
1292 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
1293 scsi_build_sense(scp, sdebug_dsense, ILLEGAL_REQUEST, asc, 0);
1294 memset(sks, 0, sizeof(sks));
1295 sks[0] = 0x80;
1296 if (c_d)
1297 sks[0] |= 0x40;
1298 if (in_bit >= 0) {
1299 sks[0] |= 0x8;
1300 sks[0] |= 0x7 & in_bit;
1301 }
1302 put_unaligned_be16(in_byte, sks + 1);
1303 if (sdebug_dsense) {
1304 sl = sbuff[7] + 8;
1305 sbuff[7] = sl;
1306 sbuff[sl] = 0x2;
1307 sbuff[sl + 1] = 0x6;
1308 memcpy(sbuff + sl + 4, sks, 3);
1309 } else
1310 memcpy(sbuff + 15, sks, 3);
1311 if (sdebug_verbose)
1312 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
1313 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
1314 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
1315}
1316
1317static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
1318{
1319 if (!scp->sense_buffer) {
1320 sdev_printk(KERN_ERR, scp->device,
1321 "%s: sense_buffer is NULL\n", __func__);
1322 return;
1323 }
1324 memset(scp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1325
1326 scsi_build_sense(scp, sdebug_dsense, key, asc, asq);
1327
1328 if (sdebug_verbose)
1329 sdev_printk(KERN_INFO, scp->device,
1330 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
1331 my_name, key, asc, asq);
1332}
1333
1334static void mk_sense_invalid_opcode(struct scsi_cmnd *scp)
1335{
1336 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
1337}
1338
1339static int scsi_debug_ioctl(struct scsi_device *dev, unsigned int cmd,
1340 void __user *arg)
1341{
1342 if (sdebug_verbose) {
1343 if (0x1261 == cmd)
1344 sdev_printk(KERN_INFO, dev,
1345 "%s: BLKFLSBUF [0x1261]\n", __func__);
1346 else if (0x5331 == cmd)
1347 sdev_printk(KERN_INFO, dev,
1348 "%s: CDROM_GET_CAPABILITY [0x5331]\n",
1349 __func__);
1350 else
1351 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
1352 __func__, cmd);
1353 }
1354 return -EINVAL;
1355 /* return -ENOTTY; // correct return but upsets fdisk */
1356}
1357
1358static void config_cdb_len(struct scsi_device *sdev)
1359{
1360 switch (sdebug_cdb_len) {
1361 case 6: /* suggest 6 byte READ, WRITE and MODE SENSE/SELECT */
1362 sdev->use_10_for_rw = false;
1363 sdev->use_16_for_rw = false;
1364 sdev->use_10_for_ms = false;
1365 break;
1366 case 10: /* suggest 10 byte RWs and 6 byte MODE SENSE/SELECT */
1367 sdev->use_10_for_rw = true;
1368 sdev->use_16_for_rw = false;
1369 sdev->use_10_for_ms = false;
1370 break;
1371 case 12: /* suggest 10 byte RWs and 10 byte MODE SENSE/SELECT */
1372 sdev->use_10_for_rw = true;
1373 sdev->use_16_for_rw = false;
1374 sdev->use_10_for_ms = true;
1375 break;
1376 case 16:
1377 sdev->use_10_for_rw = false;
1378 sdev->use_16_for_rw = true;
1379 sdev->use_10_for_ms = true;
1380 break;
1381 case 32: /* No knobs to suggest this so same as 16 for now */
1382 sdev->use_10_for_rw = false;
1383 sdev->use_16_for_rw = true;
1384 sdev->use_10_for_ms = true;
1385 break;
1386 default:
1387 pr_warn("unexpected cdb_len=%d, force to 10\n",
1388 sdebug_cdb_len);
1389 sdev->use_10_for_rw = true;
1390 sdev->use_16_for_rw = false;
1391 sdev->use_10_for_ms = false;
1392 sdebug_cdb_len = 10;
1393 break;
1394 }
1395}
1396
1397static void all_config_cdb_len(void)
1398{
1399 struct sdebug_host_info *sdbg_host;
1400 struct Scsi_Host *shost;
1401 struct scsi_device *sdev;
1402
1403 mutex_lock(&sdebug_host_list_mutex);
1404 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
1405 shost = sdbg_host->shost;
1406 shost_for_each_device(sdev, shost) {
1407 config_cdb_len(sdev);
1408 }
1409 }
1410 mutex_unlock(&sdebug_host_list_mutex);
1411}
1412
1413static void clear_luns_changed_on_target(struct sdebug_dev_info *devip)
1414{
1415 struct sdebug_host_info *sdhp = devip->sdbg_host;
1416 struct sdebug_dev_info *dp;
1417
1418 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
1419 if ((devip->sdbg_host == dp->sdbg_host) &&
1420 (devip->target == dp->target)) {
1421 clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
1422 }
1423 }
1424}
1425
1426static int make_ua(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1427{
1428 int k;
1429
1430 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
1431 if (k != SDEBUG_NUM_UAS) {
1432 const char *cp = NULL;
1433
1434 switch (k) {
1435 case SDEBUG_UA_POR:
1436 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
1437 POWER_ON_RESET_ASCQ);
1438 if (sdebug_verbose)
1439 cp = "power on reset";
1440 break;
1441 case SDEBUG_UA_POOCCUR:
1442 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
1443 POWER_ON_OCCURRED_ASCQ);
1444 if (sdebug_verbose)
1445 cp = "power on occurred";
1446 break;
1447 case SDEBUG_UA_BUS_RESET:
1448 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
1449 BUS_RESET_ASCQ);
1450 if (sdebug_verbose)
1451 cp = "bus reset";
1452 break;
1453 case SDEBUG_UA_MODE_CHANGED:
1454 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
1455 MODE_CHANGED_ASCQ);
1456 if (sdebug_verbose)
1457 cp = "mode parameters changed";
1458 break;
1459 case SDEBUG_UA_CAPACITY_CHANGED:
1460 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
1461 CAPACITY_CHANGED_ASCQ);
1462 if (sdebug_verbose)
1463 cp = "capacity data changed";
1464 break;
1465 case SDEBUG_UA_MICROCODE_CHANGED:
1466 mk_sense_buffer(scp, UNIT_ATTENTION,
1467 TARGET_CHANGED_ASC,
1468 MICROCODE_CHANGED_ASCQ);
1469 if (sdebug_verbose)
1470 cp = "microcode has been changed";
1471 break;
1472 case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET:
1473 mk_sense_buffer(scp, UNIT_ATTENTION,
1474 TARGET_CHANGED_ASC,
1475 MICROCODE_CHANGED_WO_RESET_ASCQ);
1476 if (sdebug_verbose)
1477 cp = "microcode has been changed without reset";
1478 break;
1479 case SDEBUG_UA_LUNS_CHANGED:
1480 /*
1481 * SPC-3 behavior is to report a UNIT ATTENTION with
1482 * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN
1483 * on the target, until a REPORT LUNS command is
1484 * received. SPC-4 behavior is to report it only once.
1485 * NOTE: sdebug_scsi_level does not use the same
1486 * values as struct scsi_device->scsi_level.
1487 */
1488 if (sdebug_scsi_level >= 6) /* SPC-4 and above */
1489 clear_luns_changed_on_target(devip);
1490 mk_sense_buffer(scp, UNIT_ATTENTION,
1491 TARGET_CHANGED_ASC,
1492 LUNS_CHANGED_ASCQ);
1493 if (sdebug_verbose)
1494 cp = "reported luns data has changed";
1495 break;
1496 default:
1497 pr_warn("unexpected unit attention code=%d\n", k);
1498 if (sdebug_verbose)
1499 cp = "unknown";
1500 break;
1501 }
1502 clear_bit(k, devip->uas_bm);
1503 if (sdebug_verbose)
1504 sdev_printk(KERN_INFO, scp->device,
1505 "%s reports: Unit attention: %s\n",
1506 my_name, cp);
1507 return check_condition_result;
1508 }
1509 return 0;
1510}
1511
1512/* Build SCSI "data-in" buffer. Returns 0 if ok else (DID_ERROR << 16). */
1513static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1514 int arr_len)
1515{
1516 int act_len;
1517 struct scsi_data_buffer *sdb = &scp->sdb;
1518
1519 if (!sdb->length)
1520 return 0;
1521 if (scp->sc_data_direction != DMA_FROM_DEVICE)
1522 return DID_ERROR << 16;
1523
1524 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
1525 arr, arr_len);
1526 scsi_set_resid(scp, scsi_bufflen(scp) - act_len);
1527
1528 return 0;
1529}
1530
1531/* Partial build of SCSI "data-in" buffer. Returns 0 if ok else
1532 * (DID_ERROR << 16). Can write to offset in data-in buffer. If multiple
1533 * calls, not required to write in ascending offset order. Assumes resid
1534 * set to scsi_bufflen() prior to any calls.
1535 */
1536static int p_fill_from_dev_buffer(struct scsi_cmnd *scp, const void *arr,
1537 int arr_len, unsigned int off_dst)
1538{
1539 unsigned int act_len, n;
1540 struct scsi_data_buffer *sdb = &scp->sdb;
1541 off_t skip = off_dst;
1542
1543 if (sdb->length <= off_dst)
1544 return 0;
1545 if (scp->sc_data_direction != DMA_FROM_DEVICE)
1546 return DID_ERROR << 16;
1547
1548 act_len = sg_pcopy_from_buffer(sdb->table.sgl, sdb->table.nents,
1549 arr, arr_len, skip);
1550 pr_debug("%s: off_dst=%u, scsi_bufflen=%u, act_len=%u, resid=%d\n",
1551 __func__, off_dst, scsi_bufflen(scp), act_len,
1552 scsi_get_resid(scp));
1553 n = scsi_bufflen(scp) - (off_dst + act_len);
1554 scsi_set_resid(scp, min_t(u32, scsi_get_resid(scp), n));
1555 return 0;
1556}
1557
1558/* Fetches from SCSI "data-out" buffer. Returns number of bytes fetched into
1559 * 'arr' or -1 if error.
1560 */
1561static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1562 int arr_len)
1563{
1564 if (!scsi_bufflen(scp))
1565 return 0;
1566 if (scp->sc_data_direction != DMA_TO_DEVICE)
1567 return -1;
1568
1569 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
1570}
1571
1572
1573static char sdebug_inq_vendor_id[9] = "Linux ";
1574static char sdebug_inq_product_id[17] = "scsi_debug ";
1575static char sdebug_inq_product_rev[5] = SDEBUG_VERSION;
1576/* Use some locally assigned NAAs for SAS addresses. */
1577static const u64 naa3_comp_a = 0x3222222000000000ULL;
1578static const u64 naa3_comp_b = 0x3333333000000000ULL;
1579static const u64 naa3_comp_c = 0x3111111000000000ULL;
1580
1581/* Device identification VPD page. Returns number of bytes placed in arr */
1582static int inquiry_vpd_83(unsigned char *arr, int port_group_id,
1583 int target_dev_id, int dev_id_num,
1584 const char *dev_id_str, int dev_id_str_len,
1585 const uuid_t *lu_name)
1586{
1587 int num, port_a;
1588 char b[32];
1589
1590 port_a = target_dev_id + 1;
1591 /* T10 vendor identifier field format (faked) */
1592 arr[0] = 0x2; /* ASCII */
1593 arr[1] = 0x1;
1594 arr[2] = 0x0;
1595 memcpy(&arr[4], sdebug_inq_vendor_id, 8);
1596 memcpy(&arr[12], sdebug_inq_product_id, 16);
1597 memcpy(&arr[28], dev_id_str, dev_id_str_len);
1598 num = 8 + 16 + dev_id_str_len;
1599 arr[3] = num;
1600 num += 4;
1601 if (dev_id_num >= 0) {
1602 if (sdebug_uuid_ctl) {
1603 /* Locally assigned UUID */
1604 arr[num++] = 0x1; /* binary (not necessarily sas) */
1605 arr[num++] = 0xa; /* PIV=0, lu, naa */
1606 arr[num++] = 0x0;
1607 arr[num++] = 0x12;
1608 arr[num++] = 0x10; /* uuid type=1, locally assigned */
1609 arr[num++] = 0x0;
1610 memcpy(arr + num, lu_name, 16);
1611 num += 16;
1612 } else {
1613 /* NAA-3, Logical unit identifier (binary) */
1614 arr[num++] = 0x1; /* binary (not necessarily sas) */
1615 arr[num++] = 0x3; /* PIV=0, lu, naa */
1616 arr[num++] = 0x0;
1617 arr[num++] = 0x8;
1618 put_unaligned_be64(naa3_comp_b + dev_id_num, arr + num);
1619 num += 8;
1620 }
1621 /* Target relative port number */
1622 arr[num++] = 0x61; /* proto=sas, binary */
1623 arr[num++] = 0x94; /* PIV=1, target port, rel port */
1624 arr[num++] = 0x0; /* reserved */
1625 arr[num++] = 0x4; /* length */
1626 arr[num++] = 0x0; /* reserved */
1627 arr[num++] = 0x0; /* reserved */
1628 arr[num++] = 0x0;
1629 arr[num++] = 0x1; /* relative port A */
1630 }
1631 /* NAA-3, Target port identifier */
1632 arr[num++] = 0x61; /* proto=sas, binary */
1633 arr[num++] = 0x93; /* piv=1, target port, naa */
1634 arr[num++] = 0x0;
1635 arr[num++] = 0x8;
1636 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1637 num += 8;
1638 /* NAA-3, Target port group identifier */
1639 arr[num++] = 0x61; /* proto=sas, binary */
1640 arr[num++] = 0x95; /* piv=1, target port group id */
1641 arr[num++] = 0x0;
1642 arr[num++] = 0x4;
1643 arr[num++] = 0;
1644 arr[num++] = 0;
1645 put_unaligned_be16(port_group_id, arr + num);
1646 num += 2;
1647 /* NAA-3, Target device identifier */
1648 arr[num++] = 0x61; /* proto=sas, binary */
1649 arr[num++] = 0xa3; /* piv=1, target device, naa */
1650 arr[num++] = 0x0;
1651 arr[num++] = 0x8;
1652 put_unaligned_be64(naa3_comp_a + target_dev_id, arr + num);
1653 num += 8;
1654 /* SCSI name string: Target device identifier */
1655 arr[num++] = 0x63; /* proto=sas, UTF-8 */
1656 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
1657 arr[num++] = 0x0;
1658 arr[num++] = 24;
1659 memcpy(arr + num, "naa.32222220", 12);
1660 num += 12;
1661 snprintf(b, sizeof(b), "%08X", target_dev_id);
1662 memcpy(arr + num, b, 8);
1663 num += 8;
1664 memset(arr + num, 0, 4);
1665 num += 4;
1666 return num;
1667}
1668
1669static unsigned char vpd84_data[] = {
1670/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
1671 0x22,0x22,0x22,0x0,0xbb,0x1,
1672 0x22,0x22,0x22,0x0,0xbb,0x2,
1673};
1674
1675/* Software interface identification VPD page */
1676static int inquiry_vpd_84(unsigned char *arr)
1677{
1678 memcpy(arr, vpd84_data, sizeof(vpd84_data));
1679 return sizeof(vpd84_data);
1680}
1681
1682/* Management network addresses VPD page */
1683static int inquiry_vpd_85(unsigned char *arr)
1684{
1685 int num = 0;
1686 const char *na1 = "https://www.kernel.org/config";
1687 const char *na2 = "http://www.kernel.org/log";
1688 int plen, olen;
1689
1690 arr[num++] = 0x1; /* lu, storage config */
1691 arr[num++] = 0x0; /* reserved */
1692 arr[num++] = 0x0;
1693 olen = strlen(na1);
1694 plen = olen + 1;
1695 if (plen % 4)
1696 plen = ((plen / 4) + 1) * 4;
1697 arr[num++] = plen; /* length, null termianted, padded */
1698 memcpy(arr + num, na1, olen);
1699 memset(arr + num + olen, 0, plen - olen);
1700 num += plen;
1701
1702 arr[num++] = 0x4; /* lu, logging */
1703 arr[num++] = 0x0; /* reserved */
1704 arr[num++] = 0x0;
1705 olen = strlen(na2);
1706 plen = olen + 1;
1707 if (plen % 4)
1708 plen = ((plen / 4) + 1) * 4;
1709 arr[num++] = plen; /* length, null terminated, padded */
1710 memcpy(arr + num, na2, olen);
1711 memset(arr + num + olen, 0, plen - olen);
1712 num += plen;
1713
1714 return num;
1715}
1716
1717/* SCSI ports VPD page */
1718static int inquiry_vpd_88(unsigned char *arr, int target_dev_id)
1719{
1720 int num = 0;
1721 int port_a, port_b;
1722
1723 port_a = target_dev_id + 1;
1724 port_b = port_a + 1;
1725 arr[num++] = 0x0; /* reserved */
1726 arr[num++] = 0x0; /* reserved */
1727 arr[num++] = 0x0;
1728 arr[num++] = 0x1; /* relative port 1 (primary) */
1729 memset(arr + num, 0, 6);
1730 num += 6;
1731 arr[num++] = 0x0;
1732 arr[num++] = 12; /* length tp descriptor */
1733 /* naa-5 target port identifier (A) */
1734 arr[num++] = 0x61; /* proto=sas, binary */
1735 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1736 arr[num++] = 0x0; /* reserved */
1737 arr[num++] = 0x8; /* length */
1738 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1739 num += 8;
1740 arr[num++] = 0x0; /* reserved */
1741 arr[num++] = 0x0; /* reserved */
1742 arr[num++] = 0x0;
1743 arr[num++] = 0x2; /* relative port 2 (secondary) */
1744 memset(arr + num, 0, 6);
1745 num += 6;
1746 arr[num++] = 0x0;
1747 arr[num++] = 12; /* length tp descriptor */
1748 /* naa-5 target port identifier (B) */
1749 arr[num++] = 0x61; /* proto=sas, binary */
1750 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1751 arr[num++] = 0x0; /* reserved */
1752 arr[num++] = 0x8; /* length */
1753 put_unaligned_be64(naa3_comp_a + port_b, arr + num);
1754 num += 8;
1755
1756 return num;
1757}
1758
1759
1760static unsigned char vpd89_data[] = {
1761/* from 4th byte */ 0,0,0,0,
1762'l','i','n','u','x',' ',' ',' ',
1763'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
1764'1','2','3','4',
17650x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
17660xec,0,0,0,
17670x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
17680,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
17690x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
17700x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
17710x53,0x41,
17720x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
17730x20,0x20,
17740x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
17750x10,0x80,
17760,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
17770x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
17780x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
17790,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
17800x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
17810x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
17820,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
17830,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17840,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17850,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17860x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
17870,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
17880xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
17890,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
17900,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17910,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17920,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17930,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17940,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17950,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17960,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17970,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17980,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17990,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
18000,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
18010,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
1802};
1803
1804/* ATA Information VPD page */
1805static int inquiry_vpd_89(unsigned char *arr)
1806{
1807 memcpy(arr, vpd89_data, sizeof(vpd89_data));
1808 return sizeof(vpd89_data);
1809}
1810
1811
1812static unsigned char vpdb0_data[] = {
1813 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
1814 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1815 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1816 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1817};
1818
1819/* Block limits VPD page (SBC-3) */
1820static int inquiry_vpd_b0(unsigned char *arr)
1821{
1822 unsigned int gran;
1823
1824 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
1825
1826 /* Optimal transfer length granularity */
1827 if (sdebug_opt_xferlen_exp != 0 &&
1828 sdebug_physblk_exp < sdebug_opt_xferlen_exp)
1829 gran = 1 << sdebug_opt_xferlen_exp;
1830 else
1831 gran = 1 << sdebug_physblk_exp;
1832 put_unaligned_be16(gran, arr + 2);
1833
1834 /* Maximum Transfer Length */
1835 if (sdebug_store_sectors > 0x400)
1836 put_unaligned_be32(sdebug_store_sectors, arr + 4);
1837
1838 /* Optimal Transfer Length */
1839 put_unaligned_be32(sdebug_opt_blks, &arr[8]);
1840
1841 if (sdebug_lbpu) {
1842 /* Maximum Unmap LBA Count */
1843 put_unaligned_be32(sdebug_unmap_max_blocks, &arr[16]);
1844
1845 /* Maximum Unmap Block Descriptor Count */
1846 put_unaligned_be32(sdebug_unmap_max_desc, &arr[20]);
1847 }
1848
1849 /* Unmap Granularity Alignment */
1850 if (sdebug_unmap_alignment) {
1851 put_unaligned_be32(sdebug_unmap_alignment, &arr[28]);
1852 arr[28] |= 0x80; /* UGAVALID */
1853 }
1854
1855 /* Optimal Unmap Granularity */
1856 put_unaligned_be32(sdebug_unmap_granularity, &arr[24]);
1857
1858 /* Maximum WRITE SAME Length */
1859 put_unaligned_be64(sdebug_write_same_length, &arr[32]);
1860
1861 if (sdebug_atomic_wr) {
1862 put_unaligned_be32(sdebug_atomic_wr_max_length, &arr[40]);
1863 put_unaligned_be32(sdebug_atomic_wr_align, &arr[44]);
1864 put_unaligned_be32(sdebug_atomic_wr_gran, &arr[48]);
1865 put_unaligned_be32(sdebug_atomic_wr_max_length_bndry, &arr[52]);
1866 put_unaligned_be32(sdebug_atomic_wr_max_bndry, &arr[56]);
1867 }
1868
1869 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
1870}
1871
1872/* Block device characteristics VPD page (SBC-3) */
1873static int inquiry_vpd_b1(struct sdebug_dev_info *devip, unsigned char *arr)
1874{
1875 memset(arr, 0, 0x3c);
1876 arr[0] = 0;
1877 arr[1] = 1; /* non rotating medium (e.g. solid state) */
1878 arr[2] = 0;
1879 arr[3] = 5; /* less than 1.8" */
1880
1881 return 0x3c;
1882}
1883
1884/* Logical block provisioning VPD page (SBC-4) */
1885static int inquiry_vpd_b2(unsigned char *arr)
1886{
1887 memset(arr, 0, 0x4);
1888 arr[0] = 0; /* threshold exponent */
1889 if (sdebug_lbpu)
1890 arr[1] = 1 << 7;
1891 if (sdebug_lbpws)
1892 arr[1] |= 1 << 6;
1893 if (sdebug_lbpws10)
1894 arr[1] |= 1 << 5;
1895 if (sdebug_lbprz && scsi_debug_lbp())
1896 arr[1] |= (sdebug_lbprz & 0x7) << 2; /* sbc4r07 and later */
1897 /* anc_sup=0; dp=0 (no provisioning group descriptor) */
1898 /* minimum_percentage=0; provisioning_type=0 (unknown) */
1899 /* threshold_percentage=0 */
1900 return 0x4;
1901}
1902
1903/* Zoned block device characteristics VPD page (ZBC mandatory) */
1904static int inquiry_vpd_b6(struct sdebug_dev_info *devip, unsigned char *arr)
1905{
1906 memset(arr, 0, 0x3c);
1907 arr[0] = 0x1; /* set URSWRZ (unrestricted read in seq. wr req zone) */
1908 /*
1909 * Set Optimal number of open sequential write preferred zones and
1910 * Optimal number of non-sequentially written sequential write
1911 * preferred zones fields to 'not reported' (0xffffffff). Leave other
1912 * fields set to zero, apart from Max. number of open swrz_s field.
1913 */
1914 put_unaligned_be32(0xffffffff, &arr[4]);
1915 put_unaligned_be32(0xffffffff, &arr[8]);
1916 if (sdeb_zbc_model == BLK_ZONED_HM && devip->max_open)
1917 put_unaligned_be32(devip->max_open, &arr[12]);
1918 else
1919 put_unaligned_be32(0xffffffff, &arr[12]);
1920 if (devip->zcap < devip->zsize) {
1921 arr[19] = ZBC_CONSTANT_ZONE_START_OFFSET;
1922 put_unaligned_be64(devip->zsize, &arr[20]);
1923 } else {
1924 arr[19] = 0;
1925 }
1926 return 0x3c;
1927}
1928
1929#define SDEBUG_BLE_LEN_AFTER_B4 28 /* thus vpage 32 bytes long */
1930
1931enum { MAXIMUM_NUMBER_OF_STREAMS = 6, PERMANENT_STREAM_COUNT = 5 };
1932
1933/* Block limits extension VPD page (SBC-4) */
1934static int inquiry_vpd_b7(unsigned char *arrb4)
1935{
1936 memset(arrb4, 0, SDEBUG_BLE_LEN_AFTER_B4);
1937 arrb4[1] = 1; /* Reduced stream control support (RSCS) */
1938 put_unaligned_be16(MAXIMUM_NUMBER_OF_STREAMS, &arrb4[2]);
1939 return SDEBUG_BLE_LEN_AFTER_B4;
1940}
1941
1942#define SDEBUG_LONG_INQ_SZ 96
1943#define SDEBUG_MAX_INQ_ARR_SZ 584
1944
1945static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1946{
1947 unsigned char pq_pdt;
1948 unsigned char *arr;
1949 unsigned char *cmd = scp->cmnd;
1950 u32 alloc_len, n;
1951 int ret;
1952 bool have_wlun, is_disk, is_zbc, is_disk_zbc;
1953
1954 alloc_len = get_unaligned_be16(cmd + 3);
1955 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
1956 if (! arr)
1957 return DID_REQUEUE << 16;
1958 is_disk = (sdebug_ptype == TYPE_DISK);
1959 is_zbc = devip->zoned;
1960 is_disk_zbc = (is_disk || is_zbc);
1961 have_wlun = scsi_is_wlun(scp->device->lun);
1962 if (have_wlun)
1963 pq_pdt = TYPE_WLUN; /* present, wlun */
1964 else if (sdebug_no_lun_0 && (devip->lun == SDEBUG_LUN_0_VAL))
1965 pq_pdt = 0x7f; /* not present, PQ=3, PDT=0x1f */
1966 else
1967 pq_pdt = (sdebug_ptype & 0x1f);
1968 arr[0] = pq_pdt;
1969 if (0x2 & cmd[1]) { /* CMDDT bit set */
1970 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
1971 kfree(arr);
1972 return check_condition_result;
1973 } else if (0x1 & cmd[1]) { /* EVPD bit set */
1974 int lu_id_num, port_group_id, target_dev_id;
1975 u32 len;
1976 char lu_id_str[6];
1977 int host_no = devip->sdbg_host->shost->host_no;
1978
1979 arr[1] = cmd[2];
1980 port_group_id = (((host_no + 1) & 0x7f) << 8) +
1981 (devip->channel & 0x7f);
1982 if (sdebug_vpd_use_hostno == 0)
1983 host_no = 0;
1984 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) +
1985 (devip->target * 1000) + devip->lun);
1986 target_dev_id = ((host_no + 1) * 2000) +
1987 (devip->target * 1000) - 3;
1988 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
1989 if (0 == cmd[2]) { /* supported vital product data pages */
1990 n = 4;
1991 arr[n++] = 0x0; /* this page */
1992 arr[n++] = 0x80; /* unit serial number */
1993 arr[n++] = 0x83; /* device identification */
1994 arr[n++] = 0x84; /* software interface ident. */
1995 arr[n++] = 0x85; /* management network addresses */
1996 arr[n++] = 0x86; /* extended inquiry */
1997 arr[n++] = 0x87; /* mode page policy */
1998 arr[n++] = 0x88; /* SCSI ports */
1999 if (is_disk_zbc) { /* SBC or ZBC */
2000 arr[n++] = 0x89; /* ATA information */
2001 arr[n++] = 0xb0; /* Block limits */
2002 arr[n++] = 0xb1; /* Block characteristics */
2003 if (is_disk)
2004 arr[n++] = 0xb2; /* LB Provisioning */
2005 if (is_zbc)
2006 arr[n++] = 0xb6; /* ZB dev. char. */
2007 arr[n++] = 0xb7; /* Block limits extension */
2008 }
2009 arr[3] = n - 4; /* number of supported VPD pages */
2010 } else if (0x80 == cmd[2]) { /* unit serial number */
2011 arr[3] = len;
2012 memcpy(&arr[4], lu_id_str, len);
2013 } else if (0x83 == cmd[2]) { /* device identification */
2014 arr[3] = inquiry_vpd_83(&arr[4], port_group_id,
2015 target_dev_id, lu_id_num,
2016 lu_id_str, len,
2017 &devip->lu_name);
2018 } else if (0x84 == cmd[2]) { /* Software interface ident. */
2019 arr[3] = inquiry_vpd_84(&arr[4]);
2020 } else if (0x85 == cmd[2]) { /* Management network addresses */
2021 arr[3] = inquiry_vpd_85(&arr[4]);
2022 } else if (0x86 == cmd[2]) { /* extended inquiry */
2023 arr[3] = 0x3c; /* number of following entries */
2024 if (sdebug_dif == T10_PI_TYPE3_PROTECTION)
2025 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
2026 else if (have_dif_prot)
2027 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
2028 else
2029 arr[4] = 0x0; /* no protection stuff */
2030 /*
2031 * GROUP_SUP=1; HEADSUP=1 (HEAD OF QUEUE); ORDSUP=1
2032 * (ORDERED queuing); SIMPSUP=1 (SIMPLE queuing).
2033 */
2034 arr[5] = 0x17;
2035 } else if (0x87 == cmd[2]) { /* mode page policy */
2036 arr[3] = 0x8; /* number of following entries */
2037 arr[4] = 0x2; /* disconnect-reconnect mp */
2038 arr[6] = 0x80; /* mlus, shared */
2039 arr[8] = 0x18; /* protocol specific lu */
2040 arr[10] = 0x82; /* mlus, per initiator port */
2041 } else if (0x88 == cmd[2]) { /* SCSI Ports */
2042 arr[3] = inquiry_vpd_88(&arr[4], target_dev_id);
2043 } else if (is_disk_zbc && 0x89 == cmd[2]) { /* ATA info */
2044 n = inquiry_vpd_89(&arr[4]);
2045 put_unaligned_be16(n, arr + 2);
2046 } else if (is_disk_zbc && 0xb0 == cmd[2]) { /* Block limits */
2047 arr[3] = inquiry_vpd_b0(&arr[4]);
2048 } else if (is_disk_zbc && 0xb1 == cmd[2]) { /* Block char. */
2049 arr[3] = inquiry_vpd_b1(devip, &arr[4]);
2050 } else if (is_disk && 0xb2 == cmd[2]) { /* LB Prov. */
2051 arr[3] = inquiry_vpd_b2(&arr[4]);
2052 } else if (is_zbc && cmd[2] == 0xb6) { /* ZB dev. charact. */
2053 arr[3] = inquiry_vpd_b6(devip, &arr[4]);
2054 } else if (cmd[2] == 0xb7) { /* block limits extension page */
2055 arr[3] = inquiry_vpd_b7(&arr[4]);
2056 } else {
2057 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
2058 kfree(arr);
2059 return check_condition_result;
2060 }
2061 len = min_t(u32, get_unaligned_be16(arr + 2) + 4, alloc_len);
2062 ret = fill_from_dev_buffer(scp, arr,
2063 min_t(u32, len, SDEBUG_MAX_INQ_ARR_SZ));
2064 kfree(arr);
2065 return ret;
2066 }
2067 /* drops through here for a standard inquiry */
2068 arr[1] = sdebug_removable ? 0x80 : 0; /* Removable disk */
2069 arr[2] = sdebug_scsi_level;
2070 arr[3] = 2; /* response_data_format==2 */
2071 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
2072 arr[5] = (int)have_dif_prot; /* PROTECT bit */
2073 if (sdebug_vpd_use_hostno == 0)
2074 arr[5] |= 0x10; /* claim: implicit TPGS */
2075 arr[6] = 0x10; /* claim: MultiP */
2076 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
2077 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
2078 memcpy(&arr[8], sdebug_inq_vendor_id, 8);
2079 memcpy(&arr[16], sdebug_inq_product_id, 16);
2080 memcpy(&arr[32], sdebug_inq_product_rev, 4);
2081 /* Use Vendor Specific area to place driver date in ASCII hex */
2082 memcpy(&arr[36], sdebug_version_date, 8);
2083 /* version descriptors (2 bytes each) follow */
2084 put_unaligned_be16(0xc0, arr + 58); /* SAM-6 no version claimed */
2085 put_unaligned_be16(0x5c0, arr + 60); /* SPC-5 no version claimed */
2086 n = 62;
2087 if (is_disk) { /* SBC-4 no version claimed */
2088 put_unaligned_be16(0x600, arr + n);
2089 n += 2;
2090 } else if (sdebug_ptype == TYPE_TAPE) { /* SSC-4 rev 3 */
2091 put_unaligned_be16(0x525, arr + n);
2092 n += 2;
2093 } else if (is_zbc) { /* ZBC BSR INCITS 536 revision 05 */
2094 put_unaligned_be16(0x624, arr + n);
2095 n += 2;
2096 }
2097 put_unaligned_be16(0x2100, arr + n); /* SPL-4 no version claimed */
2098 ret = fill_from_dev_buffer(scp, arr,
2099 min_t(u32, alloc_len, SDEBUG_LONG_INQ_SZ));
2100 kfree(arr);
2101 return ret;
2102}
2103
2104/* See resp_iec_m_pg() for how this data is manipulated */
2105static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
2106 0, 0, 0x0, 0x0};
2107
2108static int resp_requests(struct scsi_cmnd *scp,
2109 struct sdebug_dev_info *devip)
2110{
2111 unsigned char *cmd = scp->cmnd;
2112 unsigned char arr[SCSI_SENSE_BUFFERSIZE]; /* assume >= 18 bytes */
2113 bool dsense = !!(cmd[1] & 1);
2114 u32 alloc_len = cmd[4];
2115 u32 len = 18;
2116 int stopped_state = atomic_read(&devip->stopped);
2117
2118 memset(arr, 0, sizeof(arr));
2119 if (stopped_state > 0) { /* some "pollable" data [spc6r02: 5.12.2] */
2120 if (dsense) {
2121 arr[0] = 0x72;
2122 arr[1] = NOT_READY;
2123 arr[2] = LOGICAL_UNIT_NOT_READY;
2124 arr[3] = (stopped_state == 2) ? 0x1 : 0x2;
2125 len = 8;
2126 } else {
2127 arr[0] = 0x70;
2128 arr[2] = NOT_READY; /* NO_SENSE in sense_key */
2129 arr[7] = 0xa; /* 18 byte sense buffer */
2130 arr[12] = LOGICAL_UNIT_NOT_READY;
2131 arr[13] = (stopped_state == 2) ? 0x1 : 0x2;
2132 }
2133 } else if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
2134 /* Information exceptions control mode page: TEST=1, MRIE=6 */
2135 if (dsense) {
2136 arr[0] = 0x72;
2137 arr[1] = 0x0; /* NO_SENSE in sense_key */
2138 arr[2] = THRESHOLD_EXCEEDED;
2139 arr[3] = 0xff; /* Failure prediction(false) */
2140 len = 8;
2141 } else {
2142 arr[0] = 0x70;
2143 arr[2] = 0x0; /* NO_SENSE in sense_key */
2144 arr[7] = 0xa; /* 18 byte sense buffer */
2145 arr[12] = THRESHOLD_EXCEEDED;
2146 arr[13] = 0xff; /* Failure prediction(false) */
2147 }
2148 } else { /* nothing to report */
2149 if (dsense) {
2150 len = 8;
2151 memset(arr, 0, len);
2152 arr[0] = 0x72;
2153 } else {
2154 memset(arr, 0, len);
2155 arr[0] = 0x70;
2156 arr[7] = 0xa;
2157 }
2158 }
2159 return fill_from_dev_buffer(scp, arr, min_t(u32, len, alloc_len));
2160}
2161
2162static int resp_start_stop(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2163{
2164 unsigned char *cmd = scp->cmnd;
2165 int power_cond, want_stop, stopped_state;
2166 bool changing;
2167
2168 power_cond = (cmd[4] & 0xf0) >> 4;
2169 if (power_cond) {
2170 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
2171 return check_condition_result;
2172 }
2173 want_stop = !(cmd[4] & 1);
2174 stopped_state = atomic_read(&devip->stopped);
2175 if (stopped_state == 2) {
2176 ktime_t now_ts = ktime_get_boottime();
2177
2178 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) {
2179 u64 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts));
2180
2181 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) {
2182 /* tur_ms_to_ready timer extinguished */
2183 atomic_set(&devip->stopped, 0);
2184 stopped_state = 0;
2185 }
2186 }
2187 if (stopped_state == 2) {
2188 if (want_stop) {
2189 stopped_state = 1; /* dummy up success */
2190 } else { /* Disallow tur_ms_to_ready delay to be overridden */
2191 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 0 /* START bit */);
2192 return check_condition_result;
2193 }
2194 }
2195 }
2196 changing = (stopped_state != want_stop);
2197 if (changing)
2198 atomic_xchg(&devip->stopped, want_stop);
2199 if (!changing || (cmd[1] & 0x1)) /* state unchanged or IMMED bit set in cdb */
2200 return SDEG_RES_IMMED_MASK;
2201 else
2202 return 0;
2203}
2204
2205static sector_t get_sdebug_capacity(void)
2206{
2207 static const unsigned int gibibyte = 1073741824;
2208
2209 if (sdebug_virtual_gb > 0)
2210 return (sector_t)sdebug_virtual_gb *
2211 (gibibyte / sdebug_sector_size);
2212 else
2213 return sdebug_store_sectors;
2214}
2215
2216#define SDEBUG_READCAP_ARR_SZ 8
2217static int resp_readcap(struct scsi_cmnd *scp,
2218 struct sdebug_dev_info *devip)
2219{
2220 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
2221 unsigned int capac;
2222
2223 /* following just in case virtual_gb changed */
2224 sdebug_capacity = get_sdebug_capacity();
2225 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
2226 if (sdebug_capacity < 0xffffffff) {
2227 capac = (unsigned int)sdebug_capacity - 1;
2228 put_unaligned_be32(capac, arr + 0);
2229 } else
2230 put_unaligned_be32(0xffffffff, arr + 0);
2231 put_unaligned_be16(sdebug_sector_size, arr + 6);
2232 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
2233}
2234
2235#define SDEBUG_READCAP16_ARR_SZ 32
2236static int resp_readcap16(struct scsi_cmnd *scp,
2237 struct sdebug_dev_info *devip)
2238{
2239 unsigned char *cmd = scp->cmnd;
2240 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
2241 u32 alloc_len;
2242
2243 alloc_len = get_unaligned_be32(cmd + 10);
2244 /* following just in case virtual_gb changed */
2245 sdebug_capacity = get_sdebug_capacity();
2246 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
2247 put_unaligned_be64((u64)(sdebug_capacity - 1), arr + 0);
2248 put_unaligned_be32(sdebug_sector_size, arr + 8);
2249 arr[13] = sdebug_physblk_exp & 0xf;
2250 arr[14] = (sdebug_lowest_aligned >> 8) & 0x3f;
2251
2252 if (scsi_debug_lbp()) {
2253 arr[14] |= 0x80; /* LBPME */
2254 /* from sbc4r07, this LBPRZ field is 1 bit, but the LBPRZ in
2255 * the LB Provisioning VPD page is 3 bits. Note that lbprz=2
2256 * in the wider field maps to 0 in this field.
2257 */
2258 if (sdebug_lbprz & 1) /* precisely what the draft requires */
2259 arr[14] |= 0x40;
2260 }
2261
2262 /*
2263 * Since the scsi_debug READ CAPACITY implementation always reports the
2264 * total disk capacity, set RC BASIS = 1 for host-managed ZBC devices.
2265 */
2266 if (devip->zoned)
2267 arr[12] |= 1 << 4;
2268
2269 arr[15] = sdebug_lowest_aligned & 0xff;
2270
2271 if (have_dif_prot) {
2272 arr[12] = (sdebug_dif - 1) << 1; /* P_TYPE */
2273 arr[12] |= 1; /* PROT_EN */
2274 }
2275
2276 return fill_from_dev_buffer(scp, arr,
2277 min_t(u32, alloc_len, SDEBUG_READCAP16_ARR_SZ));
2278}
2279
2280#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
2281
2282static int resp_report_tgtpgs(struct scsi_cmnd *scp,
2283 struct sdebug_dev_info *devip)
2284{
2285 unsigned char *cmd = scp->cmnd;
2286 unsigned char *arr;
2287 int host_no = devip->sdbg_host->shost->host_no;
2288 int port_group_a, port_group_b, port_a, port_b;
2289 u32 alen, n, rlen;
2290 int ret;
2291
2292 alen = get_unaligned_be32(cmd + 6);
2293 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
2294 if (! arr)
2295 return DID_REQUEUE << 16;
2296 /*
2297 * EVPD page 0x88 states we have two ports, one
2298 * real and a fake port with no device connected.
2299 * So we create two port groups with one port each
2300 * and set the group with port B to unavailable.
2301 */
2302 port_a = 0x1; /* relative port A */
2303 port_b = 0x2; /* relative port B */
2304 port_group_a = (((host_no + 1) & 0x7f) << 8) +
2305 (devip->channel & 0x7f);
2306 port_group_b = (((host_no + 1) & 0x7f) << 8) +
2307 (devip->channel & 0x7f) + 0x80;
2308
2309 /*
2310 * The asymmetric access state is cycled according to the host_id.
2311 */
2312 n = 4;
2313 if (sdebug_vpd_use_hostno == 0) {
2314 arr[n++] = host_no % 3; /* Asymm access state */
2315 arr[n++] = 0x0F; /* claim: all states are supported */
2316 } else {
2317 arr[n++] = 0x0; /* Active/Optimized path */
2318 arr[n++] = 0x01; /* only support active/optimized paths */
2319 }
2320 put_unaligned_be16(port_group_a, arr + n);
2321 n += 2;
2322 arr[n++] = 0; /* Reserved */
2323 arr[n++] = 0; /* Status code */
2324 arr[n++] = 0; /* Vendor unique */
2325 arr[n++] = 0x1; /* One port per group */
2326 arr[n++] = 0; /* Reserved */
2327 arr[n++] = 0; /* Reserved */
2328 put_unaligned_be16(port_a, arr + n);
2329 n += 2;
2330 arr[n++] = 3; /* Port unavailable */
2331 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
2332 put_unaligned_be16(port_group_b, arr + n);
2333 n += 2;
2334 arr[n++] = 0; /* Reserved */
2335 arr[n++] = 0; /* Status code */
2336 arr[n++] = 0; /* Vendor unique */
2337 arr[n++] = 0x1; /* One port per group */
2338 arr[n++] = 0; /* Reserved */
2339 arr[n++] = 0; /* Reserved */
2340 put_unaligned_be16(port_b, arr + n);
2341 n += 2;
2342
2343 rlen = n - 4;
2344 put_unaligned_be32(rlen, arr + 0);
2345
2346 /*
2347 * Return the smallest value of either
2348 * - The allocated length
2349 * - The constructed command length
2350 * - The maximum array size
2351 */
2352 rlen = min(alen, n);
2353 ret = fill_from_dev_buffer(scp, arr,
2354 min_t(u32, rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
2355 kfree(arr);
2356 return ret;
2357}
2358
2359static int resp_rsup_opcodes(struct scsi_cmnd *scp,
2360 struct sdebug_dev_info *devip)
2361{
2362 bool rctd;
2363 u8 reporting_opts, req_opcode, sdeb_i, supp;
2364 u16 req_sa, u;
2365 u32 alloc_len, a_len;
2366 int k, offset, len, errsts, count, bump, na;
2367 const struct opcode_info_t *oip;
2368 const struct opcode_info_t *r_oip;
2369 u8 *arr;
2370 u8 *cmd = scp->cmnd;
2371
2372 rctd = !!(cmd[2] & 0x80);
2373 reporting_opts = cmd[2] & 0x7;
2374 req_opcode = cmd[3];
2375 req_sa = get_unaligned_be16(cmd + 4);
2376 alloc_len = get_unaligned_be32(cmd + 6);
2377 if (alloc_len < 4 || alloc_len > 0xffff) {
2378 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
2379 return check_condition_result;
2380 }
2381 if (alloc_len > 8192)
2382 a_len = 8192;
2383 else
2384 a_len = alloc_len;
2385 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC);
2386 if (NULL == arr) {
2387 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
2388 INSUFF_RES_ASCQ);
2389 return check_condition_result;
2390 }
2391 switch (reporting_opts) {
2392 case 0: /* all commands */
2393 /* count number of commands */
2394 for (count = 0, oip = opcode_info_arr;
2395 oip->num_attached != 0xff; ++oip) {
2396 if (F_INV_OP & oip->flags)
2397 continue;
2398 count += (oip->num_attached + 1);
2399 }
2400 bump = rctd ? 20 : 8;
2401 put_unaligned_be32(count * bump, arr);
2402 for (offset = 4, oip = opcode_info_arr;
2403 oip->num_attached != 0xff && offset < a_len; ++oip) {
2404 if (F_INV_OP & oip->flags)
2405 continue;
2406 na = oip->num_attached;
2407 arr[offset] = oip->opcode;
2408 put_unaligned_be16(oip->sa, arr + offset + 2);
2409 if (rctd)
2410 arr[offset + 5] |= 0x2;
2411 if (FF_SA & oip->flags)
2412 arr[offset + 5] |= 0x1;
2413 put_unaligned_be16(oip->len_mask[0], arr + offset + 6);
2414 if (rctd)
2415 put_unaligned_be16(0xa, arr + offset + 8);
2416 r_oip = oip;
2417 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) {
2418 if (F_INV_OP & oip->flags)
2419 continue;
2420 offset += bump;
2421 arr[offset] = oip->opcode;
2422 put_unaligned_be16(oip->sa, arr + offset + 2);
2423 if (rctd)
2424 arr[offset + 5] |= 0x2;
2425 if (FF_SA & oip->flags)
2426 arr[offset + 5] |= 0x1;
2427 put_unaligned_be16(oip->len_mask[0],
2428 arr + offset + 6);
2429 if (rctd)
2430 put_unaligned_be16(0xa,
2431 arr + offset + 8);
2432 }
2433 oip = r_oip;
2434 offset += bump;
2435 }
2436 break;
2437 case 1: /* one command: opcode only */
2438 case 2: /* one command: opcode plus service action */
2439 case 3: /* one command: if sa==0 then opcode only else opcode+sa */
2440 sdeb_i = opcode_ind_arr[req_opcode];
2441 oip = &opcode_info_arr[sdeb_i];
2442 if (F_INV_OP & oip->flags) {
2443 supp = 1;
2444 offset = 4;
2445 } else {
2446 if (1 == reporting_opts) {
2447 if (FF_SA & oip->flags) {
2448 mk_sense_invalid_fld(scp, SDEB_IN_CDB,
2449 2, 2);
2450 kfree(arr);
2451 return check_condition_result;
2452 }
2453 req_sa = 0;
2454 } else if (2 == reporting_opts &&
2455 0 == (FF_SA & oip->flags)) {
2456 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
2457 kfree(arr); /* point at requested sa */
2458 return check_condition_result;
2459 }
2460 if (0 == (FF_SA & oip->flags) &&
2461 req_opcode == oip->opcode)
2462 supp = 3;
2463 else if (0 == (FF_SA & oip->flags)) {
2464 na = oip->num_attached;
2465 for (k = 0, oip = oip->arrp; k < na;
2466 ++k, ++oip) {
2467 if (req_opcode == oip->opcode)
2468 break;
2469 }
2470 supp = (k >= na) ? 1 : 3;
2471 } else if (req_sa != oip->sa) {
2472 na = oip->num_attached;
2473 for (k = 0, oip = oip->arrp; k < na;
2474 ++k, ++oip) {
2475 if (req_sa == oip->sa)
2476 break;
2477 }
2478 supp = (k >= na) ? 1 : 3;
2479 } else
2480 supp = 3;
2481 if (3 == supp) {
2482 u = oip->len_mask[0];
2483 put_unaligned_be16(u, arr + 2);
2484 arr[4] = oip->opcode;
2485 for (k = 1; k < u; ++k)
2486 arr[4 + k] = (k < 16) ?
2487 oip->len_mask[k] : 0xff;
2488 offset = 4 + u;
2489 } else
2490 offset = 4;
2491 }
2492 arr[1] = (rctd ? 0x80 : 0) | supp;
2493 if (rctd) {
2494 put_unaligned_be16(0xa, arr + offset);
2495 offset += 12;
2496 }
2497 break;
2498 default:
2499 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
2500 kfree(arr);
2501 return check_condition_result;
2502 }
2503 offset = (offset < a_len) ? offset : a_len;
2504 len = (offset < alloc_len) ? offset : alloc_len;
2505 errsts = fill_from_dev_buffer(scp, arr, len);
2506 kfree(arr);
2507 return errsts;
2508}
2509
2510static int resp_rsup_tmfs(struct scsi_cmnd *scp,
2511 struct sdebug_dev_info *devip)
2512{
2513 bool repd;
2514 u32 alloc_len, len;
2515 u8 arr[16];
2516 u8 *cmd = scp->cmnd;
2517
2518 memset(arr, 0, sizeof(arr));
2519 repd = !!(cmd[2] & 0x80);
2520 alloc_len = get_unaligned_be32(cmd + 6);
2521 if (alloc_len < 4) {
2522 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
2523 return check_condition_result;
2524 }
2525 arr[0] = 0xc8; /* ATS | ATSS | LURS */
2526 arr[1] = 0x1; /* ITNRS */
2527 if (repd) {
2528 arr[3] = 0xc;
2529 len = 16;
2530 } else
2531 len = 4;
2532
2533 len = (len < alloc_len) ? len : alloc_len;
2534 return fill_from_dev_buffer(scp, arr, len);
2535}
2536
2537/* <<Following mode page info copied from ST318451LW>> */
2538
2539static int resp_err_recov_pg(unsigned char *p, int pcontrol, int target)
2540{ /* Read-Write Error Recovery page for mode_sense */
2541 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
2542 5, 0, 0xff, 0xff};
2543
2544 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
2545 if (1 == pcontrol)
2546 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
2547 return sizeof(err_recov_pg);
2548}
2549
2550static int resp_disconnect_pg(unsigned char *p, int pcontrol, int target)
2551{ /* Disconnect-Reconnect page for mode_sense */
2552 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
2553 0, 0, 0, 0, 0, 0, 0, 0};
2554
2555 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
2556 if (1 == pcontrol)
2557 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
2558 return sizeof(disconnect_pg);
2559}
2560
2561static int resp_format_pg(unsigned char *p, int pcontrol, int target)
2562{ /* Format device page for mode_sense */
2563 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
2564 0, 0, 0, 0, 0, 0, 0, 0,
2565 0, 0, 0, 0, 0x40, 0, 0, 0};
2566
2567 memcpy(p, format_pg, sizeof(format_pg));
2568 put_unaligned_be16(sdebug_sectors_per, p + 10);
2569 put_unaligned_be16(sdebug_sector_size, p + 12);
2570 if (sdebug_removable)
2571 p[20] |= 0x20; /* should agree with INQUIRY */
2572 if (1 == pcontrol)
2573 memset(p + 2, 0, sizeof(format_pg) - 2);
2574 return sizeof(format_pg);
2575}
2576
2577static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
2578 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
2579 0, 0, 0, 0};
2580
2581static int resp_caching_pg(unsigned char *p, int pcontrol, int target)
2582{ /* Caching page for mode_sense */
2583 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
2584 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
2585 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
2586 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
2587
2588 if (SDEBUG_OPT_N_WCE & sdebug_opts)
2589 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
2590 memcpy(p, caching_pg, sizeof(caching_pg));
2591 if (1 == pcontrol)
2592 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
2593 else if (2 == pcontrol)
2594 memcpy(p, d_caching_pg, sizeof(d_caching_pg));
2595 return sizeof(caching_pg);
2596}
2597
2598static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
2599 0, 0, 0x2, 0x4b};
2600
2601static int resp_ctrl_m_pg(unsigned char *p, int pcontrol, int target)
2602{ /* Control mode page for mode_sense */
2603 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
2604 0, 0, 0, 0};
2605 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
2606 0, 0, 0x2, 0x4b};
2607
2608 if (sdebug_dsense)
2609 ctrl_m_pg[2] |= 0x4;
2610 else
2611 ctrl_m_pg[2] &= ~0x4;
2612
2613 if (sdebug_ato)
2614 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
2615
2616 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
2617 if (1 == pcontrol)
2618 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
2619 else if (2 == pcontrol)
2620 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
2621 return sizeof(ctrl_m_pg);
2622}
2623
2624/* IO Advice Hints Grouping mode page */
2625static int resp_grouping_m_pg(unsigned char *p, int pcontrol, int target)
2626{
2627 /* IO Advice Hints Grouping mode page */
2628 struct grouping_m_pg {
2629 u8 page_code; /* OR 0x40 when subpage_code > 0 */
2630 u8 subpage_code;
2631 __be16 page_length;
2632 u8 reserved[12];
2633 struct scsi_io_group_descriptor descr[MAXIMUM_NUMBER_OF_STREAMS];
2634 };
2635 static const struct grouping_m_pg gr_m_pg = {
2636 .page_code = 0xa | 0x40,
2637 .subpage_code = 5,
2638 .page_length = cpu_to_be16(sizeof(gr_m_pg) - 4),
2639 .descr = {
2640 { .st_enble = 1 },
2641 { .st_enble = 1 },
2642 { .st_enble = 1 },
2643 { .st_enble = 1 },
2644 { .st_enble = 1 },
2645 { .st_enble = 0 },
2646 }
2647 };
2648
2649 BUILD_BUG_ON(sizeof(struct grouping_m_pg) !=
2650 16 + MAXIMUM_NUMBER_OF_STREAMS * 16);
2651 memcpy(p, &gr_m_pg, sizeof(gr_m_pg));
2652 if (1 == pcontrol) {
2653 /* There are no changeable values so clear from byte 4 on. */
2654 memset(p + 4, 0, sizeof(gr_m_pg) - 4);
2655 }
2656 return sizeof(gr_m_pg);
2657}
2658
2659static int resp_iec_m_pg(unsigned char *p, int pcontrol, int target)
2660{ /* Informational Exceptions control mode page for mode_sense */
2661 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
2662 0, 0, 0x0, 0x0};
2663 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
2664 0, 0, 0x0, 0x0};
2665
2666 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
2667 if (1 == pcontrol)
2668 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
2669 else if (2 == pcontrol)
2670 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
2671 return sizeof(iec_m_pg);
2672}
2673
2674static int resp_sas_sf_m_pg(unsigned char *p, int pcontrol, int target)
2675{ /* SAS SSP mode page - short format for mode_sense */
2676 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
2677 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
2678
2679 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
2680 if (1 == pcontrol)
2681 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
2682 return sizeof(sas_sf_m_pg);
2683}
2684
2685
2686static int resp_sas_pcd_m_spg(unsigned char *p, int pcontrol, int target,
2687 int target_dev_id)
2688{ /* SAS phy control and discover mode page for mode_sense */
2689 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
2690 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
2691 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2692 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2693 0x2, 0, 0, 0, 0, 0, 0, 0,
2694 0x88, 0x99, 0, 0, 0, 0, 0, 0,
2695 0, 0, 0, 0, 0, 0, 0, 0,
2696 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
2697 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2698 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2699 0x3, 0, 0, 0, 0, 0, 0, 0,
2700 0x88, 0x99, 0, 0, 0, 0, 0, 0,
2701 0, 0, 0, 0, 0, 0, 0, 0,
2702 };
2703 int port_a, port_b;
2704
2705 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 16);
2706 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 24);
2707 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 64);
2708 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 72);
2709 port_a = target_dev_id + 1;
2710 port_b = port_a + 1;
2711 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
2712 put_unaligned_be32(port_a, p + 20);
2713 put_unaligned_be32(port_b, p + 48 + 20);
2714 if (1 == pcontrol)
2715 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
2716 return sizeof(sas_pcd_m_pg);
2717}
2718
2719static int resp_sas_sha_m_spg(unsigned char *p, int pcontrol)
2720{ /* SAS SSP shared protocol specific port mode subpage */
2721 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
2722 0, 0, 0, 0, 0, 0, 0, 0,
2723 };
2724
2725 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
2726 if (1 == pcontrol)
2727 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
2728 return sizeof(sas_sha_m_pg);
2729}
2730
2731/* PAGE_SIZE is more than necessary but provides room for future expansion. */
2732#define SDEBUG_MAX_MSENSE_SZ PAGE_SIZE
2733
2734static int resp_mode_sense(struct scsi_cmnd *scp,
2735 struct sdebug_dev_info *devip)
2736{
2737 int pcontrol, pcode, subpcode, bd_len;
2738 unsigned char dev_spec;
2739 u32 alloc_len, offset, len;
2740 int target_dev_id;
2741 int target = scp->device->id;
2742 unsigned char *ap;
2743 unsigned char *arr __free(kfree);
2744 unsigned char *cmd = scp->cmnd;
2745 bool dbd, llbaa, msense_6, is_disk, is_zbc;
2746
2747 arr = kzalloc(SDEBUG_MAX_MSENSE_SZ, GFP_ATOMIC);
2748 if (!arr)
2749 return -ENOMEM;
2750 dbd = !!(cmd[1] & 0x8); /* disable block descriptors */
2751 pcontrol = (cmd[2] & 0xc0) >> 6;
2752 pcode = cmd[2] & 0x3f;
2753 subpcode = cmd[3];
2754 msense_6 = (MODE_SENSE == cmd[0]);
2755 llbaa = msense_6 ? false : !!(cmd[1] & 0x10);
2756 is_disk = (sdebug_ptype == TYPE_DISK);
2757 is_zbc = devip->zoned;
2758 if ((is_disk || is_zbc) && !dbd)
2759 bd_len = llbaa ? 16 : 8;
2760 else
2761 bd_len = 0;
2762 alloc_len = msense_6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2763 if (0x3 == pcontrol) { /* Saving values not supported */
2764 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
2765 return check_condition_result;
2766 }
2767 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
2768 (devip->target * 1000) - 3;
2769 /* for disks+zbc set DPOFUA bit and clear write protect (WP) bit */
2770 if (is_disk || is_zbc) {
2771 dev_spec = 0x10; /* =0x90 if WP=1 implies read-only */
2772 if (sdebug_wp)
2773 dev_spec |= 0x80;
2774 } else
2775 dev_spec = 0x0;
2776 if (msense_6) {
2777 arr[2] = dev_spec;
2778 arr[3] = bd_len;
2779 offset = 4;
2780 } else {
2781 arr[3] = dev_spec;
2782 if (16 == bd_len)
2783 arr[4] = 0x1; /* set LONGLBA bit */
2784 arr[7] = bd_len; /* assume 255 or less */
2785 offset = 8;
2786 }
2787 ap = arr + offset;
2788 if ((bd_len > 0) && (!sdebug_capacity))
2789 sdebug_capacity = get_sdebug_capacity();
2790
2791 if (8 == bd_len) {
2792 if (sdebug_capacity > 0xfffffffe)
2793 put_unaligned_be32(0xffffffff, ap + 0);
2794 else
2795 put_unaligned_be32(sdebug_capacity, ap + 0);
2796 put_unaligned_be16(sdebug_sector_size, ap + 6);
2797 offset += bd_len;
2798 ap = arr + offset;
2799 } else if (16 == bd_len) {
2800 put_unaligned_be64((u64)sdebug_capacity, ap + 0);
2801 put_unaligned_be32(sdebug_sector_size, ap + 12);
2802 offset += bd_len;
2803 ap = arr + offset;
2804 }
2805
2806 /*
2807 * N.B. If len>0 before resp_*_pg() call, then form of that call should be:
2808 * len += resp_*_pg(ap + len, pcontrol, target);
2809 */
2810 switch (pcode) {
2811 case 0x1: /* Read-Write error recovery page, direct access */
2812 if (subpcode > 0x0 && subpcode < 0xff)
2813 goto bad_subpcode;
2814 len = resp_err_recov_pg(ap, pcontrol, target);
2815 offset += len;
2816 break;
2817 case 0x2: /* Disconnect-Reconnect page, all devices */
2818 if (subpcode > 0x0 && subpcode < 0xff)
2819 goto bad_subpcode;
2820 len = resp_disconnect_pg(ap, pcontrol, target);
2821 offset += len;
2822 break;
2823 case 0x3: /* Format device page, direct access */
2824 if (subpcode > 0x0 && subpcode < 0xff)
2825 goto bad_subpcode;
2826 if (is_disk) {
2827 len = resp_format_pg(ap, pcontrol, target);
2828 offset += len;
2829 } else {
2830 goto bad_pcode;
2831 }
2832 break;
2833 case 0x8: /* Caching page, direct access */
2834 if (subpcode > 0x0 && subpcode < 0xff)
2835 goto bad_subpcode;
2836 if (is_disk || is_zbc) {
2837 len = resp_caching_pg(ap, pcontrol, target);
2838 offset += len;
2839 } else {
2840 goto bad_pcode;
2841 }
2842 break;
2843 case 0xa: /* Control Mode page, all devices */
2844 switch (subpcode) {
2845 case 0:
2846 len = resp_ctrl_m_pg(ap, pcontrol, target);
2847 break;
2848 case 0x05:
2849 len = resp_grouping_m_pg(ap, pcontrol, target);
2850 break;
2851 case 0xff:
2852 len = resp_ctrl_m_pg(ap, pcontrol, target);
2853 len += resp_grouping_m_pg(ap + len, pcontrol, target);
2854 break;
2855 default:
2856 goto bad_subpcode;
2857 }
2858 offset += len;
2859 break;
2860 case 0x19: /* if spc==1 then sas phy, control+discover */
2861 if (subpcode > 0x2 && subpcode < 0xff)
2862 goto bad_subpcode;
2863 len = 0;
2864 if ((0x0 == subpcode) || (0xff == subpcode))
2865 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2866 if ((0x1 == subpcode) || (0xff == subpcode))
2867 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
2868 target_dev_id);
2869 if ((0x2 == subpcode) || (0xff == subpcode))
2870 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2871 offset += len;
2872 break;
2873 case 0x1c: /* Informational Exceptions Mode page, all devices */
2874 if (subpcode > 0x0 && subpcode < 0xff)
2875 goto bad_subpcode;
2876 len = resp_iec_m_pg(ap, pcontrol, target);
2877 offset += len;
2878 break;
2879 case 0x3f: /* Read all Mode pages */
2880 if (subpcode > 0x0 && subpcode < 0xff)
2881 goto bad_subpcode;
2882 len = resp_err_recov_pg(ap, pcontrol, target);
2883 len += resp_disconnect_pg(ap + len, pcontrol, target);
2884 if (is_disk) {
2885 len += resp_format_pg(ap + len, pcontrol, target);
2886 len += resp_caching_pg(ap + len, pcontrol, target);
2887 } else if (is_zbc) {
2888 len += resp_caching_pg(ap + len, pcontrol, target);
2889 }
2890 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
2891 if (0xff == subpcode)
2892 len += resp_grouping_m_pg(ap + len, pcontrol, target);
2893 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2894 if (0xff == subpcode) {
2895 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
2896 target_dev_id);
2897 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2898 }
2899 len += resp_iec_m_pg(ap + len, pcontrol, target);
2900 offset += len;
2901 break;
2902 default:
2903 goto bad_pcode;
2904 }
2905 if (msense_6)
2906 arr[0] = offset - 1;
2907 else
2908 put_unaligned_be16((offset - 2), arr + 0);
2909 return fill_from_dev_buffer(scp, arr, min_t(u32, alloc_len, offset));
2910
2911bad_pcode:
2912 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2913 return check_condition_result;
2914
2915bad_subpcode:
2916 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2917 return check_condition_result;
2918}
2919
2920#define SDEBUG_MAX_MSELECT_SZ 512
2921
2922static int resp_mode_select(struct scsi_cmnd *scp,
2923 struct sdebug_dev_info *devip)
2924{
2925 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
2926 int param_len, res, mpage;
2927 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
2928 unsigned char *cmd = scp->cmnd;
2929 int mselect6 = (MODE_SELECT == cmd[0]);
2930
2931 memset(arr, 0, sizeof(arr));
2932 pf = cmd[1] & 0x10;
2933 sp = cmd[1] & 0x1;
2934 param_len = mselect6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2935 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
2936 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1);
2937 return check_condition_result;
2938 }
2939 res = fetch_to_dev_buffer(scp, arr, param_len);
2940 if (-1 == res)
2941 return DID_ERROR << 16;
2942 else if (sdebug_verbose && (res < param_len))
2943 sdev_printk(KERN_INFO, scp->device,
2944 "%s: cdb indicated=%d, IO sent=%d bytes\n",
2945 __func__, param_len, res);
2946 md_len = mselect6 ? (arr[0] + 1) : (get_unaligned_be16(arr + 0) + 2);
2947 bd_len = mselect6 ? arr[3] : get_unaligned_be16(arr + 6);
2948 off = bd_len + (mselect6 ? 4 : 8);
2949 if (md_len > 2 || off >= res) {
2950 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1);
2951 return check_condition_result;
2952 }
2953 mpage = arr[off] & 0x3f;
2954 ps = !!(arr[off] & 0x80);
2955 if (ps) {
2956 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7);
2957 return check_condition_result;
2958 }
2959 spf = !!(arr[off] & 0x40);
2960 pg_len = spf ? (get_unaligned_be16(arr + off + 2) + 4) :
2961 (arr[off + 1] + 2);
2962 if ((pg_len + off) > param_len) {
2963 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2964 PARAMETER_LIST_LENGTH_ERR, 0);
2965 return check_condition_result;
2966 }
2967 switch (mpage) {
2968 case 0x8: /* Caching Mode page */
2969 if (caching_pg[1] == arr[off + 1]) {
2970 memcpy(caching_pg + 2, arr + off + 2,
2971 sizeof(caching_pg) - 2);
2972 goto set_mode_changed_ua;
2973 }
2974 break;
2975 case 0xa: /* Control Mode page */
2976 if (ctrl_m_pg[1] == arr[off + 1]) {
2977 memcpy(ctrl_m_pg + 2, arr + off + 2,
2978 sizeof(ctrl_m_pg) - 2);
2979 if (ctrl_m_pg[4] & 0x8)
2980 sdebug_wp = true;
2981 else
2982 sdebug_wp = false;
2983 sdebug_dsense = !!(ctrl_m_pg[2] & 0x4);
2984 goto set_mode_changed_ua;
2985 }
2986 break;
2987 case 0x1c: /* Informational Exceptions Mode page */
2988 if (iec_m_pg[1] == arr[off + 1]) {
2989 memcpy(iec_m_pg + 2, arr + off + 2,
2990 sizeof(iec_m_pg) - 2);
2991 goto set_mode_changed_ua;
2992 }
2993 break;
2994 default:
2995 break;
2996 }
2997 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5);
2998 return check_condition_result;
2999set_mode_changed_ua:
3000 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
3001 return 0;
3002}
3003
3004static int resp_temp_l_pg(unsigned char *arr)
3005{
3006 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
3007 0x0, 0x1, 0x3, 0x2, 0x0, 65,
3008 };
3009
3010 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
3011 return sizeof(temp_l_pg);
3012}
3013
3014static int resp_ie_l_pg(unsigned char *arr)
3015{
3016 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
3017 };
3018
3019 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
3020 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
3021 arr[4] = THRESHOLD_EXCEEDED;
3022 arr[5] = 0xff;
3023 }
3024 return sizeof(ie_l_pg);
3025}
3026
3027static int resp_env_rep_l_spg(unsigned char *arr)
3028{
3029 unsigned char env_rep_l_spg[] = {0x0, 0x0, 0x23, 0x8,
3030 0x0, 40, 72, 0xff, 45, 18, 0, 0,
3031 0x1, 0x0, 0x23, 0x8,
3032 0x0, 55, 72, 35, 55, 45, 0, 0,
3033 };
3034
3035 memcpy(arr, env_rep_l_spg, sizeof(env_rep_l_spg));
3036 return sizeof(env_rep_l_spg);
3037}
3038
3039#define SDEBUG_MAX_LSENSE_SZ 512
3040
3041static int resp_log_sense(struct scsi_cmnd *scp,
3042 struct sdebug_dev_info *devip)
3043{
3044 int ppc, sp, pcode, subpcode;
3045 u32 alloc_len, len, n;
3046 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
3047 unsigned char *cmd = scp->cmnd;
3048
3049 memset(arr, 0, sizeof(arr));
3050 ppc = cmd[1] & 0x2;
3051 sp = cmd[1] & 0x1;
3052 if (ppc || sp) {
3053 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0);
3054 return check_condition_result;
3055 }
3056 pcode = cmd[2] & 0x3f;
3057 subpcode = cmd[3] & 0xff;
3058 alloc_len = get_unaligned_be16(cmd + 7);
3059 arr[0] = pcode;
3060 if (0 == subpcode) {
3061 switch (pcode) {
3062 case 0x0: /* Supported log pages log page */
3063 n = 4;
3064 arr[n++] = 0x0; /* this page */
3065 arr[n++] = 0xd; /* Temperature */
3066 arr[n++] = 0x2f; /* Informational exceptions */
3067 arr[3] = n - 4;
3068 break;
3069 case 0xd: /* Temperature log page */
3070 arr[3] = resp_temp_l_pg(arr + 4);
3071 break;
3072 case 0x2f: /* Informational exceptions log page */
3073 arr[3] = resp_ie_l_pg(arr + 4);
3074 break;
3075 default:
3076 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
3077 return check_condition_result;
3078 }
3079 } else if (0xff == subpcode) {
3080 arr[0] |= 0x40;
3081 arr[1] = subpcode;
3082 switch (pcode) {
3083 case 0x0: /* Supported log pages and subpages log page */
3084 n = 4;
3085 arr[n++] = 0x0;
3086 arr[n++] = 0x0; /* 0,0 page */
3087 arr[n++] = 0x0;
3088 arr[n++] = 0xff; /* this page */
3089 arr[n++] = 0xd;
3090 arr[n++] = 0x0; /* Temperature */
3091 arr[n++] = 0xd;
3092 arr[n++] = 0x1; /* Environment reporting */
3093 arr[n++] = 0xd;
3094 arr[n++] = 0xff; /* all 0xd subpages */
3095 arr[n++] = 0x2f;
3096 arr[n++] = 0x0; /* Informational exceptions */
3097 arr[n++] = 0x2f;
3098 arr[n++] = 0xff; /* all 0x2f subpages */
3099 arr[3] = n - 4;
3100 break;
3101 case 0xd: /* Temperature subpages */
3102 n = 4;
3103 arr[n++] = 0xd;
3104 arr[n++] = 0x0; /* Temperature */
3105 arr[n++] = 0xd;
3106 arr[n++] = 0x1; /* Environment reporting */
3107 arr[n++] = 0xd;
3108 arr[n++] = 0xff; /* these subpages */
3109 arr[3] = n - 4;
3110 break;
3111 case 0x2f: /* Informational exceptions subpages */
3112 n = 4;
3113 arr[n++] = 0x2f;
3114 arr[n++] = 0x0; /* Informational exceptions */
3115 arr[n++] = 0x2f;
3116 arr[n++] = 0xff; /* these subpages */
3117 arr[3] = n - 4;
3118 break;
3119 default:
3120 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
3121 return check_condition_result;
3122 }
3123 } else if (subpcode > 0) {
3124 arr[0] |= 0x40;
3125 arr[1] = subpcode;
3126 if (pcode == 0xd && subpcode == 1)
3127 arr[3] = resp_env_rep_l_spg(arr + 4);
3128 else {
3129 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
3130 return check_condition_result;
3131 }
3132 } else {
3133 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
3134 return check_condition_result;
3135 }
3136 len = min_t(u32, get_unaligned_be16(arr + 2) + 4, alloc_len);
3137 return fill_from_dev_buffer(scp, arr,
3138 min_t(u32, len, SDEBUG_MAX_INQ_ARR_SZ));
3139}
3140
3141static inline bool sdebug_dev_is_zoned(struct sdebug_dev_info *devip)
3142{
3143 return devip->nr_zones != 0;
3144}
3145
3146static struct sdeb_zone_state *zbc_zone(struct sdebug_dev_info *devip,
3147 unsigned long long lba)
3148{
3149 u32 zno = lba >> devip->zsize_shift;
3150 struct sdeb_zone_state *zsp;
3151
3152 if (devip->zcap == devip->zsize || zno < devip->nr_conv_zones)
3153 return &devip->zstate[zno];
3154
3155 /*
3156 * If the zone capacity is less than the zone size, adjust for gap
3157 * zones.
3158 */
3159 zno = 2 * zno - devip->nr_conv_zones;
3160 WARN_ONCE(zno >= devip->nr_zones, "%u > %u\n", zno, devip->nr_zones);
3161 zsp = &devip->zstate[zno];
3162 if (lba >= zsp->z_start + zsp->z_size)
3163 zsp++;
3164 WARN_ON_ONCE(lba >= zsp->z_start + zsp->z_size);
3165 return zsp;
3166}
3167
3168static inline bool zbc_zone_is_conv(struct sdeb_zone_state *zsp)
3169{
3170 return zsp->z_type == ZBC_ZTYPE_CNV;
3171}
3172
3173static inline bool zbc_zone_is_gap(struct sdeb_zone_state *zsp)
3174{
3175 return zsp->z_type == ZBC_ZTYPE_GAP;
3176}
3177
3178static inline bool zbc_zone_is_seq(struct sdeb_zone_state *zsp)
3179{
3180 return !zbc_zone_is_conv(zsp) && !zbc_zone_is_gap(zsp);
3181}
3182
3183static void zbc_close_zone(struct sdebug_dev_info *devip,
3184 struct sdeb_zone_state *zsp)
3185{
3186 enum sdebug_z_cond zc;
3187
3188 if (!zbc_zone_is_seq(zsp))
3189 return;
3190
3191 zc = zsp->z_cond;
3192 if (!(zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN))
3193 return;
3194
3195 if (zc == ZC2_IMPLICIT_OPEN)
3196 devip->nr_imp_open--;
3197 else
3198 devip->nr_exp_open--;
3199
3200 if (zsp->z_wp == zsp->z_start) {
3201 zsp->z_cond = ZC1_EMPTY;
3202 } else {
3203 zsp->z_cond = ZC4_CLOSED;
3204 devip->nr_closed++;
3205 }
3206}
3207
3208static void zbc_close_imp_open_zone(struct sdebug_dev_info *devip)
3209{
3210 struct sdeb_zone_state *zsp = &devip->zstate[0];
3211 unsigned int i;
3212
3213 for (i = 0; i < devip->nr_zones; i++, zsp++) {
3214 if (zsp->z_cond == ZC2_IMPLICIT_OPEN) {
3215 zbc_close_zone(devip, zsp);
3216 return;
3217 }
3218 }
3219}
3220
3221static void zbc_open_zone(struct sdebug_dev_info *devip,
3222 struct sdeb_zone_state *zsp, bool explicit)
3223{
3224 enum sdebug_z_cond zc;
3225
3226 if (!zbc_zone_is_seq(zsp))
3227 return;
3228
3229 zc = zsp->z_cond;
3230 if ((explicit && zc == ZC3_EXPLICIT_OPEN) ||
3231 (!explicit && zc == ZC2_IMPLICIT_OPEN))
3232 return;
3233
3234 /* Close an implicit open zone if necessary */
3235 if (explicit && zsp->z_cond == ZC2_IMPLICIT_OPEN)
3236 zbc_close_zone(devip, zsp);
3237 else if (devip->max_open &&
3238 devip->nr_imp_open + devip->nr_exp_open >= devip->max_open)
3239 zbc_close_imp_open_zone(devip);
3240
3241 if (zsp->z_cond == ZC4_CLOSED)
3242 devip->nr_closed--;
3243 if (explicit) {
3244 zsp->z_cond = ZC3_EXPLICIT_OPEN;
3245 devip->nr_exp_open++;
3246 } else {
3247 zsp->z_cond = ZC2_IMPLICIT_OPEN;
3248 devip->nr_imp_open++;
3249 }
3250}
3251
3252static inline void zbc_set_zone_full(struct sdebug_dev_info *devip,
3253 struct sdeb_zone_state *zsp)
3254{
3255 switch (zsp->z_cond) {
3256 case ZC2_IMPLICIT_OPEN:
3257 devip->nr_imp_open--;
3258 break;
3259 case ZC3_EXPLICIT_OPEN:
3260 devip->nr_exp_open--;
3261 break;
3262 default:
3263 WARN_ONCE(true, "Invalid zone %llu condition %x\n",
3264 zsp->z_start, zsp->z_cond);
3265 break;
3266 }
3267 zsp->z_cond = ZC5_FULL;
3268}
3269
3270static void zbc_inc_wp(struct sdebug_dev_info *devip,
3271 unsigned long long lba, unsigned int num)
3272{
3273 struct sdeb_zone_state *zsp = zbc_zone(devip, lba);
3274 unsigned long long n, end, zend = zsp->z_start + zsp->z_size;
3275
3276 if (!zbc_zone_is_seq(zsp))
3277 return;
3278
3279 if (zsp->z_type == ZBC_ZTYPE_SWR) {
3280 zsp->z_wp += num;
3281 if (zsp->z_wp >= zend)
3282 zbc_set_zone_full(devip, zsp);
3283 return;
3284 }
3285
3286 while (num) {
3287 if (lba != zsp->z_wp)
3288 zsp->z_non_seq_resource = true;
3289
3290 end = lba + num;
3291 if (end >= zend) {
3292 n = zend - lba;
3293 zsp->z_wp = zend;
3294 } else if (end > zsp->z_wp) {
3295 n = num;
3296 zsp->z_wp = end;
3297 } else {
3298 n = num;
3299 }
3300 if (zsp->z_wp >= zend)
3301 zbc_set_zone_full(devip, zsp);
3302
3303 num -= n;
3304 lba += n;
3305 if (num) {
3306 zsp++;
3307 zend = zsp->z_start + zsp->z_size;
3308 }
3309 }
3310}
3311
3312static int check_zbc_access_params(struct scsi_cmnd *scp,
3313 unsigned long long lba, unsigned int num, bool write)
3314{
3315 struct scsi_device *sdp = scp->device;
3316 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
3317 struct sdeb_zone_state *zsp = zbc_zone(devip, lba);
3318 struct sdeb_zone_state *zsp_end = zbc_zone(devip, lba + num - 1);
3319
3320 if (!write) {
3321 /* For host-managed, reads cannot cross zone types boundaries */
3322 if (zsp->z_type != zsp_end->z_type) {
3323 mk_sense_buffer(scp, ILLEGAL_REQUEST,
3324 LBA_OUT_OF_RANGE,
3325 READ_INVDATA_ASCQ);
3326 return check_condition_result;
3327 }
3328 return 0;
3329 }
3330
3331 /* Writing into a gap zone is not allowed */
3332 if (zbc_zone_is_gap(zsp)) {
3333 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE,
3334 ATTEMPT_ACCESS_GAP);
3335 return check_condition_result;
3336 }
3337
3338 /* No restrictions for writes within conventional zones */
3339 if (zbc_zone_is_conv(zsp)) {
3340 if (!zbc_zone_is_conv(zsp_end)) {
3341 mk_sense_buffer(scp, ILLEGAL_REQUEST,
3342 LBA_OUT_OF_RANGE,
3343 WRITE_BOUNDARY_ASCQ);
3344 return check_condition_result;
3345 }
3346 return 0;
3347 }
3348
3349 if (zsp->z_type == ZBC_ZTYPE_SWR) {
3350 /* Writes cannot cross sequential zone boundaries */
3351 if (zsp_end != zsp) {
3352 mk_sense_buffer(scp, ILLEGAL_REQUEST,
3353 LBA_OUT_OF_RANGE,
3354 WRITE_BOUNDARY_ASCQ);
3355 return check_condition_result;
3356 }
3357 /* Cannot write full zones */
3358 if (zsp->z_cond == ZC5_FULL) {
3359 mk_sense_buffer(scp, ILLEGAL_REQUEST,
3360 INVALID_FIELD_IN_CDB, 0);
3361 return check_condition_result;
3362 }
3363 /* Writes must be aligned to the zone WP */
3364 if (lba != zsp->z_wp) {
3365 mk_sense_buffer(scp, ILLEGAL_REQUEST,
3366 LBA_OUT_OF_RANGE,
3367 UNALIGNED_WRITE_ASCQ);
3368 return check_condition_result;
3369 }
3370 }
3371
3372 /* Handle implicit open of closed and empty zones */
3373 if (zsp->z_cond == ZC1_EMPTY || zsp->z_cond == ZC4_CLOSED) {
3374 if (devip->max_open &&
3375 devip->nr_exp_open >= devip->max_open) {
3376 mk_sense_buffer(scp, DATA_PROTECT,
3377 INSUFF_RES_ASC,
3378 INSUFF_ZONE_ASCQ);
3379 return check_condition_result;
3380 }
3381 zbc_open_zone(devip, zsp, false);
3382 }
3383
3384 return 0;
3385}
3386
3387static inline int check_device_access_params
3388 (struct scsi_cmnd *scp, unsigned long long lba,
3389 unsigned int num, bool write)
3390{
3391 struct scsi_device *sdp = scp->device;
3392 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
3393
3394 if (lba + num > sdebug_capacity) {
3395 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
3396 return check_condition_result;
3397 }
3398 /* transfer length excessive (tie in to block limits VPD page) */
3399 if (num > sdebug_store_sectors) {
3400 /* needs work to find which cdb byte 'num' comes from */
3401 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3402 return check_condition_result;
3403 }
3404 if (write && unlikely(sdebug_wp)) {
3405 mk_sense_buffer(scp, DATA_PROTECT, WRITE_PROTECTED, 0x2);
3406 return check_condition_result;
3407 }
3408 if (sdebug_dev_is_zoned(devip))
3409 return check_zbc_access_params(scp, lba, num, write);
3410
3411 return 0;
3412}
3413
3414/*
3415 * Note: if BUG_ON() fires it usually indicates a problem with the parser
3416 * tables. Perhaps a missing F_FAKE_RW or FF_MEDIA_IO flag. Response functions
3417 * that access any of the "stores" in struct sdeb_store_info should call this
3418 * function with bug_if_fake_rw set to true.
3419 */
3420static inline struct sdeb_store_info *devip2sip(struct sdebug_dev_info *devip,
3421 bool bug_if_fake_rw)
3422{
3423 if (sdebug_fake_rw) {
3424 BUG_ON(bug_if_fake_rw); /* See note above */
3425 return NULL;
3426 }
3427 return xa_load(per_store_ap, devip->sdbg_host->si_idx);
3428}
3429
3430static inline void
3431sdeb_read_lock(rwlock_t *lock)
3432{
3433 if (sdebug_no_rwlock)
3434 __acquire(lock);
3435 else
3436 read_lock(lock);
3437}
3438
3439static inline void
3440sdeb_read_unlock(rwlock_t *lock)
3441{
3442 if (sdebug_no_rwlock)
3443 __release(lock);
3444 else
3445 read_unlock(lock);
3446}
3447
3448static inline void
3449sdeb_write_lock(rwlock_t *lock)
3450{
3451 if (sdebug_no_rwlock)
3452 __acquire(lock);
3453 else
3454 write_lock(lock);
3455}
3456
3457static inline void
3458sdeb_write_unlock(rwlock_t *lock)
3459{
3460 if (sdebug_no_rwlock)
3461 __release(lock);
3462 else
3463 write_unlock(lock);
3464}
3465
3466static inline void
3467sdeb_data_read_lock(struct sdeb_store_info *sip)
3468{
3469 BUG_ON(!sip);
3470
3471 sdeb_read_lock(&sip->macc_data_lck);
3472}
3473
3474static inline void
3475sdeb_data_read_unlock(struct sdeb_store_info *sip)
3476{
3477 BUG_ON(!sip);
3478
3479 sdeb_read_unlock(&sip->macc_data_lck);
3480}
3481
3482static inline void
3483sdeb_data_write_lock(struct sdeb_store_info *sip)
3484{
3485 BUG_ON(!sip);
3486
3487 sdeb_write_lock(&sip->macc_data_lck);
3488}
3489
3490static inline void
3491sdeb_data_write_unlock(struct sdeb_store_info *sip)
3492{
3493 BUG_ON(!sip);
3494
3495 sdeb_write_unlock(&sip->macc_data_lck);
3496}
3497
3498static inline void
3499sdeb_data_sector_read_lock(struct sdeb_store_info *sip)
3500{
3501 BUG_ON(!sip);
3502
3503 sdeb_read_lock(&sip->macc_sector_lck);
3504}
3505
3506static inline void
3507sdeb_data_sector_read_unlock(struct sdeb_store_info *sip)
3508{
3509 BUG_ON(!sip);
3510
3511 sdeb_read_unlock(&sip->macc_sector_lck);
3512}
3513
3514static inline void
3515sdeb_data_sector_write_lock(struct sdeb_store_info *sip)
3516{
3517 BUG_ON(!sip);
3518
3519 sdeb_write_lock(&sip->macc_sector_lck);
3520}
3521
3522static inline void
3523sdeb_data_sector_write_unlock(struct sdeb_store_info *sip)
3524{
3525 BUG_ON(!sip);
3526
3527 sdeb_write_unlock(&sip->macc_sector_lck);
3528}
3529
3530/*
3531 * Atomic locking:
3532 * We simplify the atomic model to allow only 1x atomic write and many non-
3533 * atomic reads or writes for all LBAs.
3534
3535 * A RW lock has a similar bahaviour:
3536 * Only 1x writer and many readers.
3537
3538 * So use a RW lock for per-device read and write locking:
3539 * An atomic access grabs the lock as a writer and non-atomic grabs the lock
3540 * as a reader.
3541 */
3542
3543static inline void
3544sdeb_data_lock(struct sdeb_store_info *sip, bool atomic)
3545{
3546 if (atomic)
3547 sdeb_data_write_lock(sip);
3548 else
3549 sdeb_data_read_lock(sip);
3550}
3551
3552static inline void
3553sdeb_data_unlock(struct sdeb_store_info *sip, bool atomic)
3554{
3555 if (atomic)
3556 sdeb_data_write_unlock(sip);
3557 else
3558 sdeb_data_read_unlock(sip);
3559}
3560
3561/* Allow many reads but only 1x write per sector */
3562static inline void
3563sdeb_data_sector_lock(struct sdeb_store_info *sip, bool do_write)
3564{
3565 if (do_write)
3566 sdeb_data_sector_write_lock(sip);
3567 else
3568 sdeb_data_sector_read_lock(sip);
3569}
3570
3571static inline void
3572sdeb_data_sector_unlock(struct sdeb_store_info *sip, bool do_write)
3573{
3574 if (do_write)
3575 sdeb_data_sector_write_unlock(sip);
3576 else
3577 sdeb_data_sector_read_unlock(sip);
3578}
3579
3580static inline void
3581sdeb_meta_read_lock(struct sdeb_store_info *sip)
3582{
3583 if (sdebug_no_rwlock) {
3584 if (sip)
3585 __acquire(&sip->macc_meta_lck);
3586 else
3587 __acquire(&sdeb_fake_rw_lck);
3588 } else {
3589 if (sip)
3590 read_lock(&sip->macc_meta_lck);
3591 else
3592 read_lock(&sdeb_fake_rw_lck);
3593 }
3594}
3595
3596static inline void
3597sdeb_meta_read_unlock(struct sdeb_store_info *sip)
3598{
3599 if (sdebug_no_rwlock) {
3600 if (sip)
3601 __release(&sip->macc_meta_lck);
3602 else
3603 __release(&sdeb_fake_rw_lck);
3604 } else {
3605 if (sip)
3606 read_unlock(&sip->macc_meta_lck);
3607 else
3608 read_unlock(&sdeb_fake_rw_lck);
3609 }
3610}
3611
3612static inline void
3613sdeb_meta_write_lock(struct sdeb_store_info *sip)
3614{
3615 if (sdebug_no_rwlock) {
3616 if (sip)
3617 __acquire(&sip->macc_meta_lck);
3618 else
3619 __acquire(&sdeb_fake_rw_lck);
3620 } else {
3621 if (sip)
3622 write_lock(&sip->macc_meta_lck);
3623 else
3624 write_lock(&sdeb_fake_rw_lck);
3625 }
3626}
3627
3628static inline void
3629sdeb_meta_write_unlock(struct sdeb_store_info *sip)
3630{
3631 if (sdebug_no_rwlock) {
3632 if (sip)
3633 __release(&sip->macc_meta_lck);
3634 else
3635 __release(&sdeb_fake_rw_lck);
3636 } else {
3637 if (sip)
3638 write_unlock(&sip->macc_meta_lck);
3639 else
3640 write_unlock(&sdeb_fake_rw_lck);
3641 }
3642}
3643
3644/* Returns number of bytes copied or -1 if error. */
3645static int do_device_access(struct sdeb_store_info *sip, struct scsi_cmnd *scp,
3646 u32 sg_skip, u64 lba, u32 num, u8 group_number,
3647 bool do_write, bool atomic)
3648{
3649 int ret;
3650 u64 block;
3651 enum dma_data_direction dir;
3652 struct scsi_data_buffer *sdb = &scp->sdb;
3653 u8 *fsp;
3654 int i, total = 0;
3655
3656 /*
3657 * Even though reads are inherently atomic (in this driver), we expect
3658 * the atomic flag only for writes.
3659 */
3660 if (!do_write && atomic)
3661 return -1;
3662
3663 if (do_write) {
3664 dir = DMA_TO_DEVICE;
3665 write_since_sync = true;
3666 } else {
3667 dir = DMA_FROM_DEVICE;
3668 }
3669
3670 if (!sdb->length || !sip)
3671 return 0;
3672 if (scp->sc_data_direction != dir)
3673 return -1;
3674
3675 if (do_write && group_number < ARRAY_SIZE(writes_by_group_number))
3676 atomic_long_inc(&writes_by_group_number[group_number]);
3677
3678 fsp = sip->storep;
3679
3680 block = do_div(lba, sdebug_store_sectors);
3681
3682 /* Only allow 1x atomic write or multiple non-atomic writes at any given time */
3683 sdeb_data_lock(sip, atomic);
3684 for (i = 0; i < num; i++) {
3685 /* We shouldn't need to lock for atomic writes, but do it anyway */
3686 sdeb_data_sector_lock(sip, do_write);
3687 ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
3688 fsp + (block * sdebug_sector_size),
3689 sdebug_sector_size, sg_skip, do_write);
3690 sdeb_data_sector_unlock(sip, do_write);
3691 total += ret;
3692 if (ret != sdebug_sector_size)
3693 break;
3694 sg_skip += sdebug_sector_size;
3695 if (++block >= sdebug_store_sectors)
3696 block = 0;
3697 }
3698 sdeb_data_unlock(sip, atomic);
3699
3700 return total;
3701}
3702
3703/* Returns number of bytes copied or -1 if error. */
3704static int do_dout_fetch(struct scsi_cmnd *scp, u32 num, u8 *doutp)
3705{
3706 struct scsi_data_buffer *sdb = &scp->sdb;
3707
3708 if (!sdb->length)
3709 return 0;
3710 if (scp->sc_data_direction != DMA_TO_DEVICE)
3711 return -1;
3712 return sg_copy_buffer(sdb->table.sgl, sdb->table.nents, doutp,
3713 num * sdebug_sector_size, 0, true);
3714}
3715
3716/* If sip->storep+lba compares equal to arr(num), then copy top half of
3717 * arr into sip->storep+lba and return true. If comparison fails then
3718 * return false. */
3719static bool comp_write_worker(struct sdeb_store_info *sip, u64 lba, u32 num,
3720 const u8 *arr, bool compare_only)
3721{
3722 bool res;
3723 u64 block, rest = 0;
3724 u32 store_blks = sdebug_store_sectors;
3725 u32 lb_size = sdebug_sector_size;
3726 u8 *fsp = sip->storep;
3727
3728 block = do_div(lba, store_blks);
3729 if (block + num > store_blks)
3730 rest = block + num - store_blks;
3731
3732 res = !memcmp(fsp + (block * lb_size), arr, (num - rest) * lb_size);
3733 if (!res)
3734 return res;
3735 if (rest)
3736 res = memcmp(fsp, arr + ((num - rest) * lb_size),
3737 rest * lb_size);
3738 if (!res)
3739 return res;
3740 if (compare_only)
3741 return true;
3742 arr += num * lb_size;
3743 memcpy(fsp + (block * lb_size), arr, (num - rest) * lb_size);
3744 if (rest)
3745 memcpy(fsp, arr + ((num - rest) * lb_size), rest * lb_size);
3746 return res;
3747}
3748
3749static __be16 dif_compute_csum(const void *buf, int len)
3750{
3751 __be16 csum;
3752
3753 if (sdebug_guard)
3754 csum = (__force __be16)ip_compute_csum(buf, len);
3755 else
3756 csum = cpu_to_be16(crc_t10dif(buf, len));
3757
3758 return csum;
3759}
3760
3761static int dif_verify(struct t10_pi_tuple *sdt, const void *data,
3762 sector_t sector, u32 ei_lba)
3763{
3764 __be16 csum = dif_compute_csum(data, sdebug_sector_size);
3765
3766 if (sdt->guard_tag != csum) {
3767 pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
3768 (unsigned long)sector,
3769 be16_to_cpu(sdt->guard_tag),
3770 be16_to_cpu(csum));
3771 return 0x01;
3772 }
3773 if (sdebug_dif == T10_PI_TYPE1_PROTECTION &&
3774 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
3775 pr_err("REF check failed on sector %lu\n",
3776 (unsigned long)sector);
3777 return 0x03;
3778 }
3779 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3780 be32_to_cpu(sdt->ref_tag) != ei_lba) {
3781 pr_err("REF check failed on sector %lu\n",
3782 (unsigned long)sector);
3783 return 0x03;
3784 }
3785 return 0;
3786}
3787
3788static void dif_copy_prot(struct scsi_cmnd *scp, sector_t sector,
3789 unsigned int sectors, bool read)
3790{
3791 size_t resid;
3792 void *paddr;
3793 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
3794 scp->device->hostdata, true);
3795 struct t10_pi_tuple *dif_storep = sip->dif_storep;
3796 const void *dif_store_end = dif_storep + sdebug_store_sectors;
3797 struct sg_mapping_iter miter;
3798
3799 /* Bytes of protection data to copy into sgl */
3800 resid = sectors * sizeof(*dif_storep);
3801
3802 sg_miter_start(&miter, scsi_prot_sglist(scp),
3803 scsi_prot_sg_count(scp), SG_MITER_ATOMIC |
3804 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
3805
3806 while (sg_miter_next(&miter) && resid > 0) {
3807 size_t len = min_t(size_t, miter.length, resid);
3808 void *start = dif_store(sip, sector);
3809 size_t rest = 0;
3810
3811 if (dif_store_end < start + len)
3812 rest = start + len - dif_store_end;
3813
3814 paddr = miter.addr;
3815
3816 if (read)
3817 memcpy(paddr, start, len - rest);
3818 else
3819 memcpy(start, paddr, len - rest);
3820
3821 if (rest) {
3822 if (read)
3823 memcpy(paddr + len - rest, dif_storep, rest);
3824 else
3825 memcpy(dif_storep, paddr + len - rest, rest);
3826 }
3827
3828 sector += len / sizeof(*dif_storep);
3829 resid -= len;
3830 }
3831 sg_miter_stop(&miter);
3832}
3833
3834static int prot_verify_read(struct scsi_cmnd *scp, sector_t start_sec,
3835 unsigned int sectors, u32 ei_lba)
3836{
3837 int ret = 0;
3838 unsigned int i;
3839 sector_t sector;
3840 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
3841 scp->device->hostdata, true);
3842 struct t10_pi_tuple *sdt;
3843
3844 for (i = 0; i < sectors; i++, ei_lba++) {
3845 sector = start_sec + i;
3846 sdt = dif_store(sip, sector);
3847
3848 if (sdt->app_tag == cpu_to_be16(0xffff))
3849 continue;
3850
3851 /*
3852 * Because scsi_debug acts as both initiator and
3853 * target we proceed to verify the PI even if
3854 * RDPROTECT=3. This is done so the "initiator" knows
3855 * which type of error to return. Otherwise we would
3856 * have to iterate over the PI twice.
3857 */
3858 if (scp->cmnd[1] >> 5) { /* RDPROTECT */
3859 ret = dif_verify(sdt, lba2fake_store(sip, sector),
3860 sector, ei_lba);
3861 if (ret) {
3862 dif_errors++;
3863 break;
3864 }
3865 }
3866 }
3867
3868 dif_copy_prot(scp, start_sec, sectors, true);
3869 dix_reads++;
3870
3871 return ret;
3872}
3873
3874static int resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3875{
3876 bool check_prot;
3877 u32 num;
3878 u32 ei_lba;
3879 int ret;
3880 u64 lba;
3881 struct sdeb_store_info *sip = devip2sip(devip, true);
3882 u8 *cmd = scp->cmnd;
3883 bool meta_data_locked = false;
3884
3885 switch (cmd[0]) {
3886 case READ_16:
3887 ei_lba = 0;
3888 lba = get_unaligned_be64(cmd + 2);
3889 num = get_unaligned_be32(cmd + 10);
3890 check_prot = true;
3891 break;
3892 case READ_10:
3893 ei_lba = 0;
3894 lba = get_unaligned_be32(cmd + 2);
3895 num = get_unaligned_be16(cmd + 7);
3896 check_prot = true;
3897 break;
3898 case READ_6:
3899 ei_lba = 0;
3900 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
3901 (u32)(cmd[1] & 0x1f) << 16;
3902 num = (0 == cmd[4]) ? 256 : cmd[4];
3903 check_prot = true;
3904 break;
3905 case READ_12:
3906 ei_lba = 0;
3907 lba = get_unaligned_be32(cmd + 2);
3908 num = get_unaligned_be32(cmd + 6);
3909 check_prot = true;
3910 break;
3911 case XDWRITEREAD_10:
3912 ei_lba = 0;
3913 lba = get_unaligned_be32(cmd + 2);
3914 num = get_unaligned_be16(cmd + 7);
3915 check_prot = false;
3916 break;
3917 default: /* assume READ(32) */
3918 lba = get_unaligned_be64(cmd + 12);
3919 ei_lba = get_unaligned_be32(cmd + 20);
3920 num = get_unaligned_be32(cmd + 28);
3921 check_prot = false;
3922 break;
3923 }
3924 if (unlikely(have_dif_prot && check_prot)) {
3925 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3926 (cmd[1] & 0xe0)) {
3927 mk_sense_invalid_opcode(scp);
3928 return check_condition_result;
3929 }
3930 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3931 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3932 (cmd[1] & 0xe0) == 0)
3933 sdev_printk(KERN_ERR, scp->device, "Unprotected RD "
3934 "to DIF device\n");
3935 }
3936 if (unlikely((sdebug_opts & SDEBUG_OPT_SHORT_TRANSFER) &&
3937 atomic_read(&sdeb_inject_pending))) {
3938 num /= 2;
3939 atomic_set(&sdeb_inject_pending, 0);
3940 }
3941
3942 /*
3943 * When checking device access params, for reads we only check data
3944 * versus what is set at init time, so no need to lock.
3945 */
3946 ret = check_device_access_params(scp, lba, num, false);
3947 if (ret)
3948 return ret;
3949 if (unlikely((SDEBUG_OPT_MEDIUM_ERR & sdebug_opts) &&
3950 (lba <= (sdebug_medium_error_start + sdebug_medium_error_count - 1)) &&
3951 ((lba + num) > sdebug_medium_error_start))) {
3952 /* claim unrecoverable read error */
3953 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
3954 /* set info field and valid bit for fixed descriptor */
3955 if (0x70 == (scp->sense_buffer[0] & 0x7f)) {
3956 scp->sense_buffer[0] |= 0x80; /* Valid bit */
3957 ret = (lba < OPT_MEDIUM_ERR_ADDR)
3958 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
3959 put_unaligned_be32(ret, scp->sense_buffer + 3);
3960 }
3961 scsi_set_resid(scp, scsi_bufflen(scp));
3962 return check_condition_result;
3963 }
3964
3965 if (sdebug_dev_is_zoned(devip) ||
3966 (sdebug_dix && scsi_prot_sg_count(scp))) {
3967 sdeb_meta_read_lock(sip);
3968 meta_data_locked = true;
3969 }
3970
3971 /* DIX + T10 DIF */
3972 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3973 switch (prot_verify_read(scp, lba, num, ei_lba)) {
3974 case 1: /* Guard tag error */
3975 if (cmd[1] >> 5 != 3) { /* RDPROTECT != 3 */
3976 sdeb_meta_read_unlock(sip);
3977 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3978 return check_condition_result;
3979 } else if (scp->prot_flags & SCSI_PROT_GUARD_CHECK) {
3980 sdeb_meta_read_unlock(sip);
3981 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3982 return illegal_condition_result;
3983 }
3984 break;
3985 case 3: /* Reference tag error */
3986 if (cmd[1] >> 5 != 3) { /* RDPROTECT != 3 */
3987 sdeb_meta_read_unlock(sip);
3988 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 3);
3989 return check_condition_result;
3990 } else if (scp->prot_flags & SCSI_PROT_REF_CHECK) {
3991 sdeb_meta_read_unlock(sip);
3992 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 3);
3993 return illegal_condition_result;
3994 }
3995 break;
3996 }
3997 }
3998
3999 ret = do_device_access(sip, scp, 0, lba, num, 0, false, false);
4000 if (meta_data_locked)
4001 sdeb_meta_read_unlock(sip);
4002 if (unlikely(ret == -1))
4003 return DID_ERROR << 16;
4004
4005 scsi_set_resid(scp, scsi_bufflen(scp) - ret);
4006
4007 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
4008 atomic_read(&sdeb_inject_pending))) {
4009 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
4010 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
4011 atomic_set(&sdeb_inject_pending, 0);
4012 return check_condition_result;
4013 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
4014 /* Logical block guard check failed */
4015 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
4016 atomic_set(&sdeb_inject_pending, 0);
4017 return illegal_condition_result;
4018 } else if (SDEBUG_OPT_DIX_ERR & sdebug_opts) {
4019 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
4020 atomic_set(&sdeb_inject_pending, 0);
4021 return illegal_condition_result;
4022 }
4023 }
4024 return 0;
4025}
4026
4027static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
4028 unsigned int sectors, u32 ei_lba)
4029{
4030 int ret;
4031 struct t10_pi_tuple *sdt;
4032 void *daddr;
4033 sector_t sector = start_sec;
4034 int ppage_offset;
4035 int dpage_offset;
4036 struct sg_mapping_iter diter;
4037 struct sg_mapping_iter piter;
4038
4039 BUG_ON(scsi_sg_count(SCpnt) == 0);
4040 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
4041
4042 sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
4043 scsi_prot_sg_count(SCpnt),
4044 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
4045 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
4046 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
4047
4048 /* For each protection page */
4049 while (sg_miter_next(&piter)) {
4050 dpage_offset = 0;
4051 if (WARN_ON(!sg_miter_next(&diter))) {
4052 ret = 0x01;
4053 goto out;
4054 }
4055
4056 for (ppage_offset = 0; ppage_offset < piter.length;
4057 ppage_offset += sizeof(struct t10_pi_tuple)) {
4058 /* If we're at the end of the current
4059 * data page advance to the next one
4060 */
4061 if (dpage_offset >= diter.length) {
4062 if (WARN_ON(!sg_miter_next(&diter))) {
4063 ret = 0x01;
4064 goto out;
4065 }
4066 dpage_offset = 0;
4067 }
4068
4069 sdt = piter.addr + ppage_offset;
4070 daddr = diter.addr + dpage_offset;
4071
4072 if (SCpnt->cmnd[1] >> 5 != 3) { /* WRPROTECT */
4073 ret = dif_verify(sdt, daddr, sector, ei_lba);
4074 if (ret)
4075 goto out;
4076 }
4077
4078 sector++;
4079 ei_lba++;
4080 dpage_offset += sdebug_sector_size;
4081 }
4082 diter.consumed = dpage_offset;
4083 sg_miter_stop(&diter);
4084 }
4085 sg_miter_stop(&piter);
4086
4087 dif_copy_prot(SCpnt, start_sec, sectors, false);
4088 dix_writes++;
4089
4090 return 0;
4091
4092out:
4093 dif_errors++;
4094 sg_miter_stop(&diter);
4095 sg_miter_stop(&piter);
4096 return ret;
4097}
4098
4099static unsigned long lba_to_map_index(sector_t lba)
4100{
4101 if (sdebug_unmap_alignment)
4102 lba += sdebug_unmap_granularity - sdebug_unmap_alignment;
4103 sector_div(lba, sdebug_unmap_granularity);
4104 return lba;
4105}
4106
4107static sector_t map_index_to_lba(unsigned long index)
4108{
4109 sector_t lba = index * sdebug_unmap_granularity;
4110
4111 if (sdebug_unmap_alignment)
4112 lba -= sdebug_unmap_granularity - sdebug_unmap_alignment;
4113 return lba;
4114}
4115
4116static unsigned int map_state(struct sdeb_store_info *sip, sector_t lba,
4117 unsigned int *num)
4118{
4119 sector_t end;
4120 unsigned int mapped;
4121 unsigned long index;
4122 unsigned long next;
4123
4124 index = lba_to_map_index(lba);
4125 mapped = test_bit(index, sip->map_storep);
4126
4127 if (mapped)
4128 next = find_next_zero_bit(sip->map_storep, map_size, index);
4129 else
4130 next = find_next_bit(sip->map_storep, map_size, index);
4131
4132 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
4133 *num = end - lba;
4134 return mapped;
4135}
4136
4137static void map_region(struct sdeb_store_info *sip, sector_t lba,
4138 unsigned int len)
4139{
4140 sector_t end = lba + len;
4141
4142 while (lba < end) {
4143 unsigned long index = lba_to_map_index(lba);
4144
4145 if (index < map_size)
4146 set_bit(index, sip->map_storep);
4147
4148 lba = map_index_to_lba(index + 1);
4149 }
4150}
4151
4152static void unmap_region(struct sdeb_store_info *sip, sector_t lba,
4153 unsigned int len)
4154{
4155 sector_t end = lba + len;
4156 u8 *fsp = sip->storep;
4157
4158 while (lba < end) {
4159 unsigned long index = lba_to_map_index(lba);
4160
4161 if (lba == map_index_to_lba(index) &&
4162 lba + sdebug_unmap_granularity <= end &&
4163 index < map_size) {
4164 clear_bit(index, sip->map_storep);
4165 if (sdebug_lbprz) { /* for LBPRZ=2 return 0xff_s */
4166 memset(fsp + lba * sdebug_sector_size,
4167 (sdebug_lbprz & 1) ? 0 : 0xff,
4168 sdebug_sector_size *
4169 sdebug_unmap_granularity);
4170 }
4171 if (sip->dif_storep) {
4172 memset(sip->dif_storep + lba, 0xff,
4173 sizeof(*sip->dif_storep) *
4174 sdebug_unmap_granularity);
4175 }
4176 }
4177 lba = map_index_to_lba(index + 1);
4178 }
4179}
4180
4181static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4182{
4183 bool check_prot;
4184 u32 num;
4185 u8 group = 0;
4186 u32 ei_lba;
4187 int ret;
4188 u64 lba;
4189 struct sdeb_store_info *sip = devip2sip(devip, true);
4190 u8 *cmd = scp->cmnd;
4191 bool meta_data_locked = false;
4192
4193 switch (cmd[0]) {
4194 case WRITE_16:
4195 ei_lba = 0;
4196 lba = get_unaligned_be64(cmd + 2);
4197 num = get_unaligned_be32(cmd + 10);
4198 group = cmd[14] & 0x3f;
4199 check_prot = true;
4200 break;
4201 case WRITE_10:
4202 ei_lba = 0;
4203 lba = get_unaligned_be32(cmd + 2);
4204 group = cmd[6] & 0x3f;
4205 num = get_unaligned_be16(cmd + 7);
4206 check_prot = true;
4207 break;
4208 case WRITE_6:
4209 ei_lba = 0;
4210 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
4211 (u32)(cmd[1] & 0x1f) << 16;
4212 num = (0 == cmd[4]) ? 256 : cmd[4];
4213 check_prot = true;
4214 break;
4215 case WRITE_12:
4216 ei_lba = 0;
4217 lba = get_unaligned_be32(cmd + 2);
4218 num = get_unaligned_be32(cmd + 6);
4219 group = cmd[6] & 0x3f;
4220 check_prot = true;
4221 break;
4222 case 0x53: /* XDWRITEREAD(10) */
4223 ei_lba = 0;
4224 lba = get_unaligned_be32(cmd + 2);
4225 group = cmd[6] & 0x1f;
4226 num = get_unaligned_be16(cmd + 7);
4227 check_prot = false;
4228 break;
4229 default: /* assume WRITE(32) */
4230 group = cmd[6] & 0x3f;
4231 lba = get_unaligned_be64(cmd + 12);
4232 ei_lba = get_unaligned_be32(cmd + 20);
4233 num = get_unaligned_be32(cmd + 28);
4234 check_prot = false;
4235 break;
4236 }
4237 if (unlikely(have_dif_prot && check_prot)) {
4238 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
4239 (cmd[1] & 0xe0)) {
4240 mk_sense_invalid_opcode(scp);
4241 return check_condition_result;
4242 }
4243 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
4244 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
4245 (cmd[1] & 0xe0) == 0)
4246 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
4247 "to DIF device\n");
4248 }
4249
4250 if (sdebug_dev_is_zoned(devip) ||
4251 (sdebug_dix && scsi_prot_sg_count(scp)) ||
4252 scsi_debug_lbp()) {
4253 sdeb_meta_write_lock(sip);
4254 meta_data_locked = true;
4255 }
4256
4257 ret = check_device_access_params(scp, lba, num, true);
4258 if (ret) {
4259 if (meta_data_locked)
4260 sdeb_meta_write_unlock(sip);
4261 return ret;
4262 }
4263
4264 /* DIX + T10 DIF */
4265 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
4266 switch (prot_verify_write(scp, lba, num, ei_lba)) {
4267 case 1: /* Guard tag error */
4268 if (scp->prot_flags & SCSI_PROT_GUARD_CHECK) {
4269 sdeb_meta_write_unlock(sip);
4270 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
4271 return illegal_condition_result;
4272 } else if (scp->cmnd[1] >> 5 != 3) { /* WRPROTECT != 3 */
4273 sdeb_meta_write_unlock(sip);
4274 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
4275 return check_condition_result;
4276 }
4277 break;
4278 case 3: /* Reference tag error */
4279 if (scp->prot_flags & SCSI_PROT_REF_CHECK) {
4280 sdeb_meta_write_unlock(sip);
4281 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 3);
4282 return illegal_condition_result;
4283 } else if (scp->cmnd[1] >> 5 != 3) { /* WRPROTECT != 3 */
4284 sdeb_meta_write_unlock(sip);
4285 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 3);
4286 return check_condition_result;
4287 }
4288 break;
4289 }
4290 }
4291
4292 ret = do_device_access(sip, scp, 0, lba, num, group, true, false);
4293 if (unlikely(scsi_debug_lbp()))
4294 map_region(sip, lba, num);
4295
4296 /* If ZBC zone then bump its write pointer */
4297 if (sdebug_dev_is_zoned(devip))
4298 zbc_inc_wp(devip, lba, num);
4299 if (meta_data_locked)
4300 sdeb_meta_write_unlock(sip);
4301
4302 if (unlikely(-1 == ret))
4303 return DID_ERROR << 16;
4304 else if (unlikely(sdebug_verbose &&
4305 (ret < (num * sdebug_sector_size))))
4306 sdev_printk(KERN_INFO, scp->device,
4307 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
4308 my_name, num * sdebug_sector_size, ret);
4309
4310 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
4311 atomic_read(&sdeb_inject_pending))) {
4312 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
4313 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
4314 atomic_set(&sdeb_inject_pending, 0);
4315 return check_condition_result;
4316 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
4317 /* Logical block guard check failed */
4318 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
4319 atomic_set(&sdeb_inject_pending, 0);
4320 return illegal_condition_result;
4321 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) {
4322 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
4323 atomic_set(&sdeb_inject_pending, 0);
4324 return illegal_condition_result;
4325 }
4326 }
4327 return 0;
4328}
4329
4330/*
4331 * T10 has only specified WRITE SCATTERED(16) and WRITE SCATTERED(32).
4332 * No READ GATHERED yet (requires bidi or long cdb holding gather list).
4333 */
4334static int resp_write_scat(struct scsi_cmnd *scp,
4335 struct sdebug_dev_info *devip)
4336{
4337 u8 *cmd = scp->cmnd;
4338 u8 *lrdp = NULL;
4339 u8 *up;
4340 struct sdeb_store_info *sip = devip2sip(devip, true);
4341 u8 wrprotect;
4342 u16 lbdof, num_lrd, k;
4343 u32 num, num_by, bt_len, lbdof_blen, sg_off, cum_lb;
4344 u32 lb_size = sdebug_sector_size;
4345 u32 ei_lba;
4346 u64 lba;
4347 u8 group;
4348 int ret, res;
4349 bool is_16;
4350 static const u32 lrd_size = 32; /* + parameter list header size */
4351
4352 if (cmd[0] == VARIABLE_LENGTH_CMD) {
4353 is_16 = false;
4354 group = cmd[6] & 0x3f;
4355 wrprotect = (cmd[10] >> 5) & 0x7;
4356 lbdof = get_unaligned_be16(cmd + 12);
4357 num_lrd = get_unaligned_be16(cmd + 16);
4358 bt_len = get_unaligned_be32(cmd + 28);
4359 } else { /* that leaves WRITE SCATTERED(16) */
4360 is_16 = true;
4361 wrprotect = (cmd[2] >> 5) & 0x7;
4362 lbdof = get_unaligned_be16(cmd + 4);
4363 num_lrd = get_unaligned_be16(cmd + 8);
4364 bt_len = get_unaligned_be32(cmd + 10);
4365 group = cmd[14] & 0x3f;
4366 if (unlikely(have_dif_prot)) {
4367 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
4368 wrprotect) {
4369 mk_sense_invalid_opcode(scp);
4370 return illegal_condition_result;
4371 }
4372 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
4373 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
4374 wrprotect == 0)
4375 sdev_printk(KERN_ERR, scp->device,
4376 "Unprotected WR to DIF device\n");
4377 }
4378 }
4379 if ((num_lrd == 0) || (bt_len == 0))
4380 return 0; /* T10 says these do-nothings are not errors */
4381 if (lbdof == 0) {
4382 if (sdebug_verbose)
4383 sdev_printk(KERN_INFO, scp->device,
4384 "%s: %s: LB Data Offset field bad\n",
4385 my_name, __func__);
4386 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4387 return illegal_condition_result;
4388 }
4389 lbdof_blen = lbdof * lb_size;
4390 if ((lrd_size + (num_lrd * lrd_size)) > lbdof_blen) {
4391 if (sdebug_verbose)
4392 sdev_printk(KERN_INFO, scp->device,
4393 "%s: %s: LBA range descriptors don't fit\n",
4394 my_name, __func__);
4395 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4396 return illegal_condition_result;
4397 }
4398 lrdp = kzalloc(lbdof_blen, GFP_ATOMIC | __GFP_NOWARN);
4399 if (lrdp == NULL)
4400 return SCSI_MLQUEUE_HOST_BUSY;
4401 if (sdebug_verbose)
4402 sdev_printk(KERN_INFO, scp->device,
4403 "%s: %s: Fetch header+scatter_list, lbdof_blen=%u\n",
4404 my_name, __func__, lbdof_blen);
4405 res = fetch_to_dev_buffer(scp, lrdp, lbdof_blen);
4406 if (res == -1) {
4407 ret = DID_ERROR << 16;
4408 goto err_out;
4409 }
4410
4411 /* Just keep it simple and always lock for now */
4412 sdeb_meta_write_lock(sip);
4413 sg_off = lbdof_blen;
4414 /* Spec says Buffer xfer Length field in number of LBs in dout */
4415 cum_lb = 0;
4416 for (k = 0, up = lrdp + lrd_size; k < num_lrd; ++k, up += lrd_size) {
4417 lba = get_unaligned_be64(up + 0);
4418 num = get_unaligned_be32(up + 8);
4419 if (sdebug_verbose)
4420 sdev_printk(KERN_INFO, scp->device,
4421 "%s: %s: k=%d LBA=0x%llx num=%u sg_off=%u\n",
4422 my_name, __func__, k, lba, num, sg_off);
4423 if (num == 0)
4424 continue;
4425 ret = check_device_access_params(scp, lba, num, true);
4426 if (ret)
4427 goto err_out_unlock;
4428 num_by = num * lb_size;
4429 ei_lba = is_16 ? 0 : get_unaligned_be32(up + 12);
4430
4431 if ((cum_lb + num) > bt_len) {
4432 if (sdebug_verbose)
4433 sdev_printk(KERN_INFO, scp->device,
4434 "%s: %s: sum of blocks > data provided\n",
4435 my_name, __func__);
4436 mk_sense_buffer(scp, ILLEGAL_REQUEST, WRITE_ERROR_ASC,
4437 0);
4438 ret = illegal_condition_result;
4439 goto err_out_unlock;
4440 }
4441
4442 /* DIX + T10 DIF */
4443 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
4444 int prot_ret = prot_verify_write(scp, lba, num,
4445 ei_lba);
4446
4447 if (prot_ret) {
4448 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10,
4449 prot_ret);
4450 ret = illegal_condition_result;
4451 goto err_out_unlock;
4452 }
4453 }
4454
4455 /*
4456 * Write ranges atomically to keep as close to pre-atomic
4457 * writes behaviour as possible.
4458 */
4459 ret = do_device_access(sip, scp, sg_off, lba, num, group, true, true);
4460 /* If ZBC zone then bump its write pointer */
4461 if (sdebug_dev_is_zoned(devip))
4462 zbc_inc_wp(devip, lba, num);
4463 if (unlikely(scsi_debug_lbp()))
4464 map_region(sip, lba, num);
4465 if (unlikely(-1 == ret)) {
4466 ret = DID_ERROR << 16;
4467 goto err_out_unlock;
4468 } else if (unlikely(sdebug_verbose && (ret < num_by)))
4469 sdev_printk(KERN_INFO, scp->device,
4470 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
4471 my_name, num_by, ret);
4472
4473 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
4474 atomic_read(&sdeb_inject_pending))) {
4475 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
4476 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
4477 atomic_set(&sdeb_inject_pending, 0);
4478 ret = check_condition_result;
4479 goto err_out_unlock;
4480 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
4481 /* Logical block guard check failed */
4482 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
4483 atomic_set(&sdeb_inject_pending, 0);
4484 ret = illegal_condition_result;
4485 goto err_out_unlock;
4486 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) {
4487 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
4488 atomic_set(&sdeb_inject_pending, 0);
4489 ret = illegal_condition_result;
4490 goto err_out_unlock;
4491 }
4492 }
4493 sg_off += num_by;
4494 cum_lb += num;
4495 }
4496 ret = 0;
4497err_out_unlock:
4498 sdeb_meta_write_unlock(sip);
4499err_out:
4500 kfree(lrdp);
4501 return ret;
4502}
4503
4504static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num,
4505 u32 ei_lba, bool unmap, bool ndob)
4506{
4507 struct scsi_device *sdp = scp->device;
4508 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
4509 unsigned long long i;
4510 u64 block, lbaa;
4511 u32 lb_size = sdebug_sector_size;
4512 int ret;
4513 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
4514 scp->device->hostdata, true);
4515 u8 *fs1p;
4516 u8 *fsp;
4517 bool meta_data_locked = false;
4518
4519 if (sdebug_dev_is_zoned(devip) || scsi_debug_lbp()) {
4520 sdeb_meta_write_lock(sip);
4521 meta_data_locked = true;
4522 }
4523
4524 ret = check_device_access_params(scp, lba, num, true);
4525 if (ret)
4526 goto out;
4527
4528 if (unmap && scsi_debug_lbp()) {
4529 unmap_region(sip, lba, num);
4530 goto out;
4531 }
4532 lbaa = lba;
4533 block = do_div(lbaa, sdebug_store_sectors);
4534 /* if ndob then zero 1 logical block, else fetch 1 logical block */
4535 fsp = sip->storep;
4536 fs1p = fsp + (block * lb_size);
4537 sdeb_data_write_lock(sip);
4538 if (ndob) {
4539 memset(fs1p, 0, lb_size);
4540 ret = 0;
4541 } else
4542 ret = fetch_to_dev_buffer(scp, fs1p, lb_size);
4543
4544 if (-1 == ret) {
4545 ret = DID_ERROR << 16;
4546 goto out;
4547 } else if (sdebug_verbose && !ndob && (ret < lb_size))
4548 sdev_printk(KERN_INFO, scp->device,
4549 "%s: %s: lb size=%u, IO sent=%d bytes\n",
4550 my_name, "write same", lb_size, ret);
4551
4552 /* Copy first sector to remaining blocks */
4553 for (i = 1 ; i < num ; i++) {
4554 lbaa = lba + i;
4555 block = do_div(lbaa, sdebug_store_sectors);
4556 memmove(fsp + (block * lb_size), fs1p, lb_size);
4557 }
4558 if (scsi_debug_lbp())
4559 map_region(sip, lba, num);
4560 /* If ZBC zone then bump its write pointer */
4561 if (sdebug_dev_is_zoned(devip))
4562 zbc_inc_wp(devip, lba, num);
4563 sdeb_data_write_unlock(sip);
4564 ret = 0;
4565out:
4566 if (meta_data_locked)
4567 sdeb_meta_write_unlock(sip);
4568 return ret;
4569}
4570
4571static int resp_write_same_10(struct scsi_cmnd *scp,
4572 struct sdebug_dev_info *devip)
4573{
4574 u8 *cmd = scp->cmnd;
4575 u32 lba;
4576 u16 num;
4577 u32 ei_lba = 0;
4578 bool unmap = false;
4579
4580 if (cmd[1] & 0x8) {
4581 if (sdebug_lbpws10 == 0) {
4582 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
4583 return check_condition_result;
4584 } else
4585 unmap = true;
4586 }
4587 lba = get_unaligned_be32(cmd + 2);
4588 num = get_unaligned_be16(cmd + 7);
4589 if (num > sdebug_write_same_length) {
4590 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
4591 return check_condition_result;
4592 }
4593 return resp_write_same(scp, lba, num, ei_lba, unmap, false);
4594}
4595
4596static int resp_write_same_16(struct scsi_cmnd *scp,
4597 struct sdebug_dev_info *devip)
4598{
4599 u8 *cmd = scp->cmnd;
4600 u64 lba;
4601 u32 num;
4602 u32 ei_lba = 0;
4603 bool unmap = false;
4604 bool ndob = false;
4605
4606 if (cmd[1] & 0x8) { /* UNMAP */
4607 if (sdebug_lbpws == 0) {
4608 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
4609 return check_condition_result;
4610 } else
4611 unmap = true;
4612 }
4613 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */
4614 ndob = true;
4615 lba = get_unaligned_be64(cmd + 2);
4616 num = get_unaligned_be32(cmd + 10);
4617 if (num > sdebug_write_same_length) {
4618 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
4619 return check_condition_result;
4620 }
4621 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob);
4622}
4623
4624/* Note the mode field is in the same position as the (lower) service action
4625 * field. For the Report supported operation codes command, SPC-4 suggests
4626 * each mode of this command should be reported separately; for future. */
4627static int resp_write_buffer(struct scsi_cmnd *scp,
4628 struct sdebug_dev_info *devip)
4629{
4630 u8 *cmd = scp->cmnd;
4631 struct scsi_device *sdp = scp->device;
4632 struct sdebug_dev_info *dp;
4633 u8 mode;
4634
4635 mode = cmd[1] & 0x1f;
4636 switch (mode) {
4637 case 0x4: /* download microcode (MC) and activate (ACT) */
4638 /* set UAs on this device only */
4639 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
4640 set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm);
4641 break;
4642 case 0x5: /* download MC, save and ACT */
4643 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm);
4644 break;
4645 case 0x6: /* download MC with offsets and ACT */
4646 /* set UAs on most devices (LUs) in this target */
4647 list_for_each_entry(dp,
4648 &devip->sdbg_host->dev_info_list,
4649 dev_list)
4650 if (dp->target == sdp->id) {
4651 set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm);
4652 if (devip != dp)
4653 set_bit(SDEBUG_UA_MICROCODE_CHANGED,
4654 dp->uas_bm);
4655 }
4656 break;
4657 case 0x7: /* download MC with offsets, save, and ACT */
4658 /* set UA on all devices (LUs) in this target */
4659 list_for_each_entry(dp,
4660 &devip->sdbg_host->dev_info_list,
4661 dev_list)
4662 if (dp->target == sdp->id)
4663 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET,
4664 dp->uas_bm);
4665 break;
4666 default:
4667 /* do nothing for this command for other mode values */
4668 break;
4669 }
4670 return 0;
4671}
4672
4673static int resp_comp_write(struct scsi_cmnd *scp,
4674 struct sdebug_dev_info *devip)
4675{
4676 u8 *cmd = scp->cmnd;
4677 u8 *arr;
4678 struct sdeb_store_info *sip = devip2sip(devip, true);
4679 u64 lba;
4680 u32 dnum;
4681 u32 lb_size = sdebug_sector_size;
4682 u8 num;
4683 int ret;
4684 int retval = 0;
4685
4686 lba = get_unaligned_be64(cmd + 2);
4687 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */
4688 if (0 == num)
4689 return 0; /* degenerate case, not an error */
4690 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
4691 (cmd[1] & 0xe0)) {
4692 mk_sense_invalid_opcode(scp);
4693 return check_condition_result;
4694 }
4695 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
4696 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
4697 (cmd[1] & 0xe0) == 0)
4698 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
4699 "to DIF device\n");
4700 ret = check_device_access_params(scp, lba, num, false);
4701 if (ret)
4702 return ret;
4703 dnum = 2 * num;
4704 arr = kcalloc(lb_size, dnum, GFP_ATOMIC);
4705 if (NULL == arr) {
4706 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
4707 INSUFF_RES_ASCQ);
4708 return check_condition_result;
4709 }
4710
4711 ret = do_dout_fetch(scp, dnum, arr);
4712 if (ret == -1) {
4713 retval = DID_ERROR << 16;
4714 goto cleanup_free;
4715 } else if (sdebug_verbose && (ret < (dnum * lb_size)))
4716 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb "
4717 "indicated=%u, IO sent=%d bytes\n", my_name,
4718 dnum * lb_size, ret);
4719
4720 sdeb_data_write_lock(sip);
4721 sdeb_meta_write_lock(sip);
4722 if (!comp_write_worker(sip, lba, num, arr, false)) {
4723 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
4724 retval = check_condition_result;
4725 goto cleanup_unlock;
4726 }
4727
4728 /* Cover sip->map_storep (which map_region()) sets with data lock */
4729 if (scsi_debug_lbp())
4730 map_region(sip, lba, num);
4731cleanup_unlock:
4732 sdeb_meta_write_unlock(sip);
4733 sdeb_data_write_unlock(sip);
4734cleanup_free:
4735 kfree(arr);
4736 return retval;
4737}
4738
4739struct unmap_block_desc {
4740 __be64 lba;
4741 __be32 blocks;
4742 __be32 __reserved;
4743};
4744
4745static int resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4746{
4747 unsigned char *buf;
4748 struct unmap_block_desc *desc;
4749 struct sdeb_store_info *sip = devip2sip(devip, true);
4750 unsigned int i, payload_len, descriptors;
4751 int ret;
4752
4753 if (!scsi_debug_lbp())
4754 return 0; /* fib and say its done */
4755 payload_len = get_unaligned_be16(scp->cmnd + 7);
4756 BUG_ON(scsi_bufflen(scp) != payload_len);
4757
4758 descriptors = (payload_len - 8) / 16;
4759 if (descriptors > sdebug_unmap_max_desc) {
4760 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
4761 return check_condition_result;
4762 }
4763
4764 buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC);
4765 if (!buf) {
4766 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
4767 INSUFF_RES_ASCQ);
4768 return check_condition_result;
4769 }
4770
4771 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
4772
4773 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
4774 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
4775
4776 desc = (void *)&buf[8];
4777
4778 sdeb_meta_write_lock(sip);
4779
4780 for (i = 0 ; i < descriptors ; i++) {
4781 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
4782 unsigned int num = get_unaligned_be32(&desc[i].blocks);
4783
4784 ret = check_device_access_params(scp, lba, num, true);
4785 if (ret)
4786 goto out;
4787
4788 unmap_region(sip, lba, num);
4789 }
4790
4791 ret = 0;
4792
4793out:
4794 sdeb_meta_write_unlock(sip);
4795 kfree(buf);
4796
4797 return ret;
4798}
4799
4800#define SDEBUG_GET_LBA_STATUS_LEN 32
4801
4802static int resp_get_lba_status(struct scsi_cmnd *scp,
4803 struct sdebug_dev_info *devip)
4804{
4805 u8 *cmd = scp->cmnd;
4806 u64 lba;
4807 u32 alloc_len, mapped, num;
4808 int ret;
4809 u8 arr[SDEBUG_GET_LBA_STATUS_LEN];
4810
4811 lba = get_unaligned_be64(cmd + 2);
4812 alloc_len = get_unaligned_be32(cmd + 10);
4813
4814 if (alloc_len < 24)
4815 return 0;
4816
4817 ret = check_device_access_params(scp, lba, 1, false);
4818 if (ret)
4819 return ret;
4820
4821 if (scsi_debug_lbp()) {
4822 struct sdeb_store_info *sip = devip2sip(devip, true);
4823
4824 mapped = map_state(sip, lba, &num);
4825 } else {
4826 mapped = 1;
4827 /* following just in case virtual_gb changed */
4828 sdebug_capacity = get_sdebug_capacity();
4829 if (sdebug_capacity - lba <= 0xffffffff)
4830 num = sdebug_capacity - lba;
4831 else
4832 num = 0xffffffff;
4833 }
4834
4835 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
4836 put_unaligned_be32(20, arr); /* Parameter Data Length */
4837 put_unaligned_be64(lba, arr + 8); /* LBA */
4838 put_unaligned_be32(num, arr + 16); /* Number of blocks */
4839 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */
4840
4841 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN);
4842}
4843
4844static int resp_get_stream_status(struct scsi_cmnd *scp,
4845 struct sdebug_dev_info *devip)
4846{
4847 u16 starting_stream_id, stream_id;
4848 const u8 *cmd = scp->cmnd;
4849 u32 alloc_len, offset;
4850 u8 arr[256] = {};
4851 struct scsi_stream_status_header *h = (void *)arr;
4852
4853 starting_stream_id = get_unaligned_be16(cmd + 4);
4854 alloc_len = get_unaligned_be32(cmd + 10);
4855
4856 if (alloc_len < 8) {
4857 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
4858 return check_condition_result;
4859 }
4860
4861 if (starting_stream_id >= MAXIMUM_NUMBER_OF_STREAMS) {
4862 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
4863 return check_condition_result;
4864 }
4865
4866 /*
4867 * The GET STREAM STATUS command only reports status information
4868 * about open streams. Treat the non-permanent stream as open.
4869 */
4870 put_unaligned_be16(MAXIMUM_NUMBER_OF_STREAMS,
4871 &h->number_of_open_streams);
4872
4873 for (offset = 8, stream_id = starting_stream_id;
4874 offset + 8 <= min_t(u32, alloc_len, sizeof(arr)) &&
4875 stream_id < MAXIMUM_NUMBER_OF_STREAMS;
4876 offset += 8, stream_id++) {
4877 struct scsi_stream_status *stream_status = (void *)arr + offset;
4878
4879 stream_status->perm = stream_id < PERMANENT_STREAM_COUNT;
4880 put_unaligned_be16(stream_id,
4881 &stream_status->stream_identifier);
4882 stream_status->rel_lifetime = stream_id + 1;
4883 }
4884 put_unaligned_be32(offset - 8, &h->len); /* PARAMETER DATA LENGTH */
4885
4886 return fill_from_dev_buffer(scp, arr, min(offset, alloc_len));
4887}
4888
4889static int resp_sync_cache(struct scsi_cmnd *scp,
4890 struct sdebug_dev_info *devip)
4891{
4892 int res = 0;
4893 u64 lba;
4894 u32 num_blocks;
4895 u8 *cmd = scp->cmnd;
4896
4897 if (cmd[0] == SYNCHRONIZE_CACHE) { /* 10 byte cdb */
4898 lba = get_unaligned_be32(cmd + 2);
4899 num_blocks = get_unaligned_be16(cmd + 7);
4900 } else { /* SYNCHRONIZE_CACHE(16) */
4901 lba = get_unaligned_be64(cmd + 2);
4902 num_blocks = get_unaligned_be32(cmd + 10);
4903 }
4904 if (lba + num_blocks > sdebug_capacity) {
4905 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4906 return check_condition_result;
4907 }
4908 if (!write_since_sync || (cmd[1] & 0x2))
4909 res = SDEG_RES_IMMED_MASK;
4910 else /* delay if write_since_sync and IMMED clear */
4911 write_since_sync = false;
4912 return res;
4913}
4914
4915/*
4916 * Assuming the LBA+num_blocks is not out-of-range, this function will return
4917 * CONDITION MET if the specified blocks will/have fitted in the cache, and
4918 * a GOOD status otherwise. Model a disk with a big cache and yield
4919 * CONDITION MET. Actually tries to bring range in main memory into the
4920 * cache associated with the CPU(s).
4921 */
4922static int resp_pre_fetch(struct scsi_cmnd *scp,
4923 struct sdebug_dev_info *devip)
4924{
4925 int res = 0;
4926 u64 lba;
4927 u64 block, rest = 0;
4928 u32 nblks;
4929 u8 *cmd = scp->cmnd;
4930 struct sdeb_store_info *sip = devip2sip(devip, true);
4931 u8 *fsp = sip->storep;
4932
4933 if (cmd[0] == PRE_FETCH) { /* 10 byte cdb */
4934 lba = get_unaligned_be32(cmd + 2);
4935 nblks = get_unaligned_be16(cmd + 7);
4936 } else { /* PRE-FETCH(16) */
4937 lba = get_unaligned_be64(cmd + 2);
4938 nblks = get_unaligned_be32(cmd + 10);
4939 }
4940 if (lba + nblks > sdebug_capacity) {
4941 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4942 return check_condition_result;
4943 }
4944 if (!fsp)
4945 goto fini;
4946 /* PRE-FETCH spec says nothing about LBP or PI so skip them */
4947 block = do_div(lba, sdebug_store_sectors);
4948 if (block + nblks > sdebug_store_sectors)
4949 rest = block + nblks - sdebug_store_sectors;
4950
4951 /* Try to bring the PRE-FETCH range into CPU's cache */
4952 sdeb_data_read_lock(sip);
4953 prefetch_range(fsp + (sdebug_sector_size * block),
4954 (nblks - rest) * sdebug_sector_size);
4955 if (rest)
4956 prefetch_range(fsp, rest * sdebug_sector_size);
4957
4958 sdeb_data_read_unlock(sip);
4959fini:
4960 if (cmd[1] & 0x2)
4961 res = SDEG_RES_IMMED_MASK;
4962 return res | condition_met_result;
4963}
4964
4965#define RL_BUCKET_ELEMS 8
4966
4967/* Even though each pseudo target has a REPORT LUNS "well known logical unit"
4968 * (W-LUN), the normal Linux scanning logic does not associate it with a
4969 * device (e.g. /dev/sg7). The following magic will make that association:
4970 * "cd /sys/class/scsi_host/host<n> ; echo '- - 49409' > scan"
4971 * where <n> is a host number. If there are multiple targets in a host then
4972 * the above will associate a W-LUN to each target. To only get a W-LUN
4973 * for target 2, then use "echo '- 2 49409' > scan" .
4974 */
4975static int resp_report_luns(struct scsi_cmnd *scp,
4976 struct sdebug_dev_info *devip)
4977{
4978 unsigned char *cmd = scp->cmnd;
4979 unsigned int alloc_len;
4980 unsigned char select_report;
4981 u64 lun;
4982 struct scsi_lun *lun_p;
4983 u8 arr[RL_BUCKET_ELEMS * sizeof(struct scsi_lun)];
4984 unsigned int lun_cnt; /* normal LUN count (max: 256) */
4985 unsigned int wlun_cnt; /* report luns W-LUN count */
4986 unsigned int tlun_cnt; /* total LUN count */
4987 unsigned int rlen; /* response length (in bytes) */
4988 int k, j, n, res;
4989 unsigned int off_rsp = 0;
4990 const int sz_lun = sizeof(struct scsi_lun);
4991
4992 clear_luns_changed_on_target(devip);
4993
4994 select_report = cmd[2];
4995 alloc_len = get_unaligned_be32(cmd + 6);
4996
4997 if (alloc_len < 4) {
4998 pr_err("alloc len too small %d\n", alloc_len);
4999 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
5000 return check_condition_result;
5001 }
5002
5003 switch (select_report) {
5004 case 0: /* all LUNs apart from W-LUNs */
5005 lun_cnt = sdebug_max_luns;
5006 wlun_cnt = 0;
5007 break;
5008 case 1: /* only W-LUNs */
5009 lun_cnt = 0;
5010 wlun_cnt = 1;
5011 break;
5012 case 2: /* all LUNs */
5013 lun_cnt = sdebug_max_luns;
5014 wlun_cnt = 1;
5015 break;
5016 case 0x10: /* only administrative LUs */
5017 case 0x11: /* see SPC-5 */
5018 case 0x12: /* only subsiduary LUs owned by referenced LU */
5019 default:
5020 pr_debug("select report invalid %d\n", select_report);
5021 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
5022 return check_condition_result;
5023 }
5024
5025 if (sdebug_no_lun_0 && (lun_cnt > 0))
5026 --lun_cnt;
5027
5028 tlun_cnt = lun_cnt + wlun_cnt;
5029 rlen = tlun_cnt * sz_lun; /* excluding 8 byte header */
5030 scsi_set_resid(scp, scsi_bufflen(scp));
5031 pr_debug("select_report %d luns = %d wluns = %d no_lun0 %d\n",
5032 select_report, lun_cnt, wlun_cnt, sdebug_no_lun_0);
5033
5034 /* loops rely on sizeof response header same as sizeof lun (both 8) */
5035 lun = sdebug_no_lun_0 ? 1 : 0;
5036 for (k = 0, j = 0, res = 0; true; ++k, j = 0) {
5037 memset(arr, 0, sizeof(arr));
5038 lun_p = (struct scsi_lun *)&arr[0];
5039 if (k == 0) {
5040 put_unaligned_be32(rlen, &arr[0]);
5041 ++lun_p;
5042 j = 1;
5043 }
5044 for ( ; j < RL_BUCKET_ELEMS; ++j, ++lun_p) {
5045 if ((k * RL_BUCKET_ELEMS) + j > lun_cnt)
5046 break;
5047 int_to_scsilun(lun++, lun_p);
5048 if (lun > 1 && sdebug_lun_am == SAM_LUN_AM_FLAT)
5049 lun_p->scsi_lun[0] |= 0x40;
5050 }
5051 if (j < RL_BUCKET_ELEMS)
5052 break;
5053 n = j * sz_lun;
5054 res = p_fill_from_dev_buffer(scp, arr, n, off_rsp);
5055 if (res)
5056 return res;
5057 off_rsp += n;
5058 }
5059 if (wlun_cnt) {
5060 int_to_scsilun(SCSI_W_LUN_REPORT_LUNS, lun_p);
5061 ++j;
5062 }
5063 if (j > 0)
5064 res = p_fill_from_dev_buffer(scp, arr, j * sz_lun, off_rsp);
5065 return res;
5066}
5067
5068static int resp_verify(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
5069{
5070 bool is_bytchk3 = false;
5071 u8 bytchk;
5072 int ret, j;
5073 u32 vnum, a_num, off;
5074 const u32 lb_size = sdebug_sector_size;
5075 u64 lba;
5076 u8 *arr;
5077 u8 *cmd = scp->cmnd;
5078 struct sdeb_store_info *sip = devip2sip(devip, true);
5079
5080 bytchk = (cmd[1] >> 1) & 0x3;
5081 if (bytchk == 0) {
5082 return 0; /* always claim internal verify okay */
5083 } else if (bytchk == 2) {
5084 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
5085 return check_condition_result;
5086 } else if (bytchk == 3) {
5087 is_bytchk3 = true; /* 1 block sent, compared repeatedly */
5088 }
5089 switch (cmd[0]) {
5090 case VERIFY_16:
5091 lba = get_unaligned_be64(cmd + 2);
5092 vnum = get_unaligned_be32(cmd + 10);
5093 break;
5094 case VERIFY: /* is VERIFY(10) */
5095 lba = get_unaligned_be32(cmd + 2);
5096 vnum = get_unaligned_be16(cmd + 7);
5097 break;
5098 default:
5099 mk_sense_invalid_opcode(scp);
5100 return check_condition_result;
5101 }
5102 if (vnum == 0)
5103 return 0; /* not an error */
5104 a_num = is_bytchk3 ? 1 : vnum;
5105 /* Treat following check like one for read (i.e. no write) access */
5106 ret = check_device_access_params(scp, lba, a_num, false);
5107 if (ret)
5108 return ret;
5109
5110 arr = kcalloc(lb_size, vnum, GFP_ATOMIC | __GFP_NOWARN);
5111 if (!arr) {
5112 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
5113 INSUFF_RES_ASCQ);
5114 return check_condition_result;
5115 }
5116 /* Not changing store, so only need read access */
5117 sdeb_data_read_lock(sip);
5118
5119 ret = do_dout_fetch(scp, a_num, arr);
5120 if (ret == -1) {
5121 ret = DID_ERROR << 16;
5122 goto cleanup;
5123 } else if (sdebug_verbose && (ret < (a_num * lb_size))) {
5124 sdev_printk(KERN_INFO, scp->device,
5125 "%s: %s: cdb indicated=%u, IO sent=%d bytes\n",
5126 my_name, __func__, a_num * lb_size, ret);
5127 }
5128 if (is_bytchk3) {
5129 for (j = 1, off = lb_size; j < vnum; ++j, off += lb_size)
5130 memcpy(arr + off, arr, lb_size);
5131 }
5132 ret = 0;
5133 if (!comp_write_worker(sip, lba, vnum, arr, true)) {
5134 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
5135 ret = check_condition_result;
5136 goto cleanup;
5137 }
5138cleanup:
5139 sdeb_data_read_unlock(sip);
5140 kfree(arr);
5141 return ret;
5142}
5143
5144#define RZONES_DESC_HD 64
5145
5146/* Report zones depending on start LBA and reporting options */
5147static int resp_report_zones(struct scsi_cmnd *scp,
5148 struct sdebug_dev_info *devip)
5149{
5150 unsigned int rep_max_zones, nrz = 0;
5151 int ret = 0;
5152 u32 alloc_len, rep_opts, rep_len;
5153 bool partial;
5154 u64 lba, zs_lba;
5155 u8 *arr = NULL, *desc;
5156 u8 *cmd = scp->cmnd;
5157 struct sdeb_zone_state *zsp = NULL;
5158 struct sdeb_store_info *sip = devip2sip(devip, false);
5159
5160 if (!sdebug_dev_is_zoned(devip)) {
5161 mk_sense_invalid_opcode(scp);
5162 return check_condition_result;
5163 }
5164 zs_lba = get_unaligned_be64(cmd + 2);
5165 alloc_len = get_unaligned_be32(cmd + 10);
5166 if (alloc_len == 0)
5167 return 0; /* not an error */
5168 rep_opts = cmd[14] & 0x3f;
5169 partial = cmd[14] & 0x80;
5170
5171 if (zs_lba >= sdebug_capacity) {
5172 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
5173 return check_condition_result;
5174 }
5175
5176 rep_max_zones = (alloc_len - 64) >> ilog2(RZONES_DESC_HD);
5177
5178 arr = kzalloc(alloc_len, GFP_ATOMIC | __GFP_NOWARN);
5179 if (!arr) {
5180 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
5181 INSUFF_RES_ASCQ);
5182 return check_condition_result;
5183 }
5184
5185 sdeb_meta_read_lock(sip);
5186
5187 desc = arr + 64;
5188 for (lba = zs_lba; lba < sdebug_capacity;
5189 lba = zsp->z_start + zsp->z_size) {
5190 if (WARN_ONCE(zbc_zone(devip, lba) == zsp, "lba = %llu\n", lba))
5191 break;
5192 zsp = zbc_zone(devip, lba);
5193 switch (rep_opts) {
5194 case 0x00:
5195 /* All zones */
5196 break;
5197 case 0x01:
5198 /* Empty zones */
5199 if (zsp->z_cond != ZC1_EMPTY)
5200 continue;
5201 break;
5202 case 0x02:
5203 /* Implicit open zones */
5204 if (zsp->z_cond != ZC2_IMPLICIT_OPEN)
5205 continue;
5206 break;
5207 case 0x03:
5208 /* Explicit open zones */
5209 if (zsp->z_cond != ZC3_EXPLICIT_OPEN)
5210 continue;
5211 break;
5212 case 0x04:
5213 /* Closed zones */
5214 if (zsp->z_cond != ZC4_CLOSED)
5215 continue;
5216 break;
5217 case 0x05:
5218 /* Full zones */
5219 if (zsp->z_cond != ZC5_FULL)
5220 continue;
5221 break;
5222 case 0x06:
5223 case 0x07:
5224 case 0x10:
5225 /*
5226 * Read-only, offline, reset WP recommended are
5227 * not emulated: no zones to report;
5228 */
5229 continue;
5230 case 0x11:
5231 /* non-seq-resource set */
5232 if (!zsp->z_non_seq_resource)
5233 continue;
5234 break;
5235 case 0x3e:
5236 /* All zones except gap zones. */
5237 if (zbc_zone_is_gap(zsp))
5238 continue;
5239 break;
5240 case 0x3f:
5241 /* Not write pointer (conventional) zones */
5242 if (zbc_zone_is_seq(zsp))
5243 continue;
5244 break;
5245 default:
5246 mk_sense_buffer(scp, ILLEGAL_REQUEST,
5247 INVALID_FIELD_IN_CDB, 0);
5248 ret = check_condition_result;
5249 goto fini;
5250 }
5251
5252 if (nrz < rep_max_zones) {
5253 /* Fill zone descriptor */
5254 desc[0] = zsp->z_type;
5255 desc[1] = zsp->z_cond << 4;
5256 if (zsp->z_non_seq_resource)
5257 desc[1] |= 1 << 1;
5258 put_unaligned_be64((u64)zsp->z_size, desc + 8);
5259 put_unaligned_be64((u64)zsp->z_start, desc + 16);
5260 put_unaligned_be64((u64)zsp->z_wp, desc + 24);
5261 desc += 64;
5262 }
5263
5264 if (partial && nrz >= rep_max_zones)
5265 break;
5266
5267 nrz++;
5268 }
5269
5270 /* Report header */
5271 /* Zone list length. */
5272 put_unaligned_be32(nrz * RZONES_DESC_HD, arr + 0);
5273 /* Maximum LBA */
5274 put_unaligned_be64(sdebug_capacity - 1, arr + 8);
5275 /* Zone starting LBA granularity. */
5276 if (devip->zcap < devip->zsize)
5277 put_unaligned_be64(devip->zsize, arr + 16);
5278
5279 rep_len = (unsigned long)desc - (unsigned long)arr;
5280 ret = fill_from_dev_buffer(scp, arr, min_t(u32, alloc_len, rep_len));
5281
5282fini:
5283 sdeb_meta_read_unlock(sip);
5284 kfree(arr);
5285 return ret;
5286}
5287
5288static int resp_atomic_write(struct scsi_cmnd *scp,
5289 struct sdebug_dev_info *devip)
5290{
5291 struct sdeb_store_info *sip;
5292 u8 *cmd = scp->cmnd;
5293 u16 boundary, len;
5294 u64 lba, lba_tmp;
5295 int ret;
5296
5297 if (!scsi_debug_atomic_write()) {
5298 mk_sense_invalid_opcode(scp);
5299 return check_condition_result;
5300 }
5301
5302 sip = devip2sip(devip, true);
5303
5304 lba = get_unaligned_be64(cmd + 2);
5305 boundary = get_unaligned_be16(cmd + 10);
5306 len = get_unaligned_be16(cmd + 12);
5307
5308 lba_tmp = lba;
5309 if (sdebug_atomic_wr_align &&
5310 do_div(lba_tmp, sdebug_atomic_wr_align)) {
5311 /* Does not meet alignment requirement */
5312 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5313 return check_condition_result;
5314 }
5315
5316 if (sdebug_atomic_wr_gran && len % sdebug_atomic_wr_gran) {
5317 /* Does not meet alignment requirement */
5318 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5319 return check_condition_result;
5320 }
5321
5322 if (boundary > 0) {
5323 if (boundary > sdebug_atomic_wr_max_bndry) {
5324 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 12, -1);
5325 return check_condition_result;
5326 }
5327
5328 if (len > sdebug_atomic_wr_max_length_bndry) {
5329 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 12, -1);
5330 return check_condition_result;
5331 }
5332 } else {
5333 if (len > sdebug_atomic_wr_max_length) {
5334 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 12, -1);
5335 return check_condition_result;
5336 }
5337 }
5338
5339 ret = do_device_access(sip, scp, 0, lba, len, 0, true, true);
5340 if (unlikely(ret == -1))
5341 return DID_ERROR << 16;
5342 if (unlikely(ret != len * sdebug_sector_size))
5343 return DID_ERROR << 16;
5344 return 0;
5345}
5346
5347/* Logic transplanted from tcmu-runner, file_zbc.c */
5348static void zbc_open_all(struct sdebug_dev_info *devip)
5349{
5350 struct sdeb_zone_state *zsp = &devip->zstate[0];
5351 unsigned int i;
5352
5353 for (i = 0; i < devip->nr_zones; i++, zsp++) {
5354 if (zsp->z_cond == ZC4_CLOSED)
5355 zbc_open_zone(devip, &devip->zstate[i], true);
5356 }
5357}
5358
5359static int resp_open_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
5360{
5361 int res = 0;
5362 u64 z_id;
5363 enum sdebug_z_cond zc;
5364 u8 *cmd = scp->cmnd;
5365 struct sdeb_zone_state *zsp;
5366 bool all = cmd[14] & 0x01;
5367 struct sdeb_store_info *sip = devip2sip(devip, false);
5368
5369 if (!sdebug_dev_is_zoned(devip)) {
5370 mk_sense_invalid_opcode(scp);
5371 return check_condition_result;
5372 }
5373 sdeb_meta_write_lock(sip);
5374
5375 if (all) {
5376 /* Check if all closed zones can be open */
5377 if (devip->max_open &&
5378 devip->nr_exp_open + devip->nr_closed > devip->max_open) {
5379 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC,
5380 INSUFF_ZONE_ASCQ);
5381 res = check_condition_result;
5382 goto fini;
5383 }
5384 /* Open all closed zones */
5385 zbc_open_all(devip);
5386 goto fini;
5387 }
5388
5389 /* Open the specified zone */
5390 z_id = get_unaligned_be64(cmd + 2);
5391 if (z_id >= sdebug_capacity) {
5392 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
5393 res = check_condition_result;
5394 goto fini;
5395 }
5396
5397 zsp = zbc_zone(devip, z_id);
5398 if (z_id != zsp->z_start) {
5399 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5400 res = check_condition_result;
5401 goto fini;
5402 }
5403 if (zbc_zone_is_conv(zsp)) {
5404 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5405 res = check_condition_result;
5406 goto fini;
5407 }
5408
5409 zc = zsp->z_cond;
5410 if (zc == ZC3_EXPLICIT_OPEN || zc == ZC5_FULL)
5411 goto fini;
5412
5413 if (devip->max_open && devip->nr_exp_open >= devip->max_open) {
5414 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC,
5415 INSUFF_ZONE_ASCQ);
5416 res = check_condition_result;
5417 goto fini;
5418 }
5419
5420 zbc_open_zone(devip, zsp, true);
5421fini:
5422 sdeb_meta_write_unlock(sip);
5423 return res;
5424}
5425
5426static void zbc_close_all(struct sdebug_dev_info *devip)
5427{
5428 unsigned int i;
5429
5430 for (i = 0; i < devip->nr_zones; i++)
5431 zbc_close_zone(devip, &devip->zstate[i]);
5432}
5433
5434static int resp_close_zone(struct scsi_cmnd *scp,
5435 struct sdebug_dev_info *devip)
5436{
5437 int res = 0;
5438 u64 z_id;
5439 u8 *cmd = scp->cmnd;
5440 struct sdeb_zone_state *zsp;
5441 bool all = cmd[14] & 0x01;
5442 struct sdeb_store_info *sip = devip2sip(devip, false);
5443
5444 if (!sdebug_dev_is_zoned(devip)) {
5445 mk_sense_invalid_opcode(scp);
5446 return check_condition_result;
5447 }
5448
5449 sdeb_meta_write_lock(sip);
5450
5451 if (all) {
5452 zbc_close_all(devip);
5453 goto fini;
5454 }
5455
5456 /* Close specified zone */
5457 z_id = get_unaligned_be64(cmd + 2);
5458 if (z_id >= sdebug_capacity) {
5459 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
5460 res = check_condition_result;
5461 goto fini;
5462 }
5463
5464 zsp = zbc_zone(devip, z_id);
5465 if (z_id != zsp->z_start) {
5466 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5467 res = check_condition_result;
5468 goto fini;
5469 }
5470 if (zbc_zone_is_conv(zsp)) {
5471 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5472 res = check_condition_result;
5473 goto fini;
5474 }
5475
5476 zbc_close_zone(devip, zsp);
5477fini:
5478 sdeb_meta_write_unlock(sip);
5479 return res;
5480}
5481
5482static void zbc_finish_zone(struct sdebug_dev_info *devip,
5483 struct sdeb_zone_state *zsp, bool empty)
5484{
5485 enum sdebug_z_cond zc = zsp->z_cond;
5486
5487 if (zc == ZC4_CLOSED || zc == ZC2_IMPLICIT_OPEN ||
5488 zc == ZC3_EXPLICIT_OPEN || (empty && zc == ZC1_EMPTY)) {
5489 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)
5490 zbc_close_zone(devip, zsp);
5491 if (zsp->z_cond == ZC4_CLOSED)
5492 devip->nr_closed--;
5493 zsp->z_wp = zsp->z_start + zsp->z_size;
5494 zsp->z_cond = ZC5_FULL;
5495 }
5496}
5497
5498static void zbc_finish_all(struct sdebug_dev_info *devip)
5499{
5500 unsigned int i;
5501
5502 for (i = 0; i < devip->nr_zones; i++)
5503 zbc_finish_zone(devip, &devip->zstate[i], false);
5504}
5505
5506static int resp_finish_zone(struct scsi_cmnd *scp,
5507 struct sdebug_dev_info *devip)
5508{
5509 struct sdeb_zone_state *zsp;
5510 int res = 0;
5511 u64 z_id;
5512 u8 *cmd = scp->cmnd;
5513 bool all = cmd[14] & 0x01;
5514 struct sdeb_store_info *sip = devip2sip(devip, false);
5515
5516 if (!sdebug_dev_is_zoned(devip)) {
5517 mk_sense_invalid_opcode(scp);
5518 return check_condition_result;
5519 }
5520
5521 sdeb_meta_write_lock(sip);
5522
5523 if (all) {
5524 zbc_finish_all(devip);
5525 goto fini;
5526 }
5527
5528 /* Finish the specified zone */
5529 z_id = get_unaligned_be64(cmd + 2);
5530 if (z_id >= sdebug_capacity) {
5531 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
5532 res = check_condition_result;
5533 goto fini;
5534 }
5535
5536 zsp = zbc_zone(devip, z_id);
5537 if (z_id != zsp->z_start) {
5538 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5539 res = check_condition_result;
5540 goto fini;
5541 }
5542 if (zbc_zone_is_conv(zsp)) {
5543 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5544 res = check_condition_result;
5545 goto fini;
5546 }
5547
5548 zbc_finish_zone(devip, zsp, true);
5549fini:
5550 sdeb_meta_write_unlock(sip);
5551 return res;
5552}
5553
5554static void zbc_rwp_zone(struct sdebug_dev_info *devip,
5555 struct sdeb_zone_state *zsp)
5556{
5557 enum sdebug_z_cond zc;
5558 struct sdeb_store_info *sip = devip2sip(devip, false);
5559
5560 if (!zbc_zone_is_seq(zsp))
5561 return;
5562
5563 zc = zsp->z_cond;
5564 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)
5565 zbc_close_zone(devip, zsp);
5566
5567 if (zsp->z_cond == ZC4_CLOSED)
5568 devip->nr_closed--;
5569
5570 if (zsp->z_wp > zsp->z_start)
5571 memset(sip->storep + zsp->z_start * sdebug_sector_size, 0,
5572 (zsp->z_wp - zsp->z_start) * sdebug_sector_size);
5573
5574 zsp->z_non_seq_resource = false;
5575 zsp->z_wp = zsp->z_start;
5576 zsp->z_cond = ZC1_EMPTY;
5577}
5578
5579static void zbc_rwp_all(struct sdebug_dev_info *devip)
5580{
5581 unsigned int i;
5582
5583 for (i = 0; i < devip->nr_zones; i++)
5584 zbc_rwp_zone(devip, &devip->zstate[i]);
5585}
5586
5587static int resp_rwp_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
5588{
5589 struct sdeb_zone_state *zsp;
5590 int res = 0;
5591 u64 z_id;
5592 u8 *cmd = scp->cmnd;
5593 bool all = cmd[14] & 0x01;
5594 struct sdeb_store_info *sip = devip2sip(devip, false);
5595
5596 if (!sdebug_dev_is_zoned(devip)) {
5597 mk_sense_invalid_opcode(scp);
5598 return check_condition_result;
5599 }
5600
5601 sdeb_meta_write_lock(sip);
5602
5603 if (all) {
5604 zbc_rwp_all(devip);
5605 goto fini;
5606 }
5607
5608 z_id = get_unaligned_be64(cmd + 2);
5609 if (z_id >= sdebug_capacity) {
5610 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
5611 res = check_condition_result;
5612 goto fini;
5613 }
5614
5615 zsp = zbc_zone(devip, z_id);
5616 if (z_id != zsp->z_start) {
5617 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5618 res = check_condition_result;
5619 goto fini;
5620 }
5621 if (zbc_zone_is_conv(zsp)) {
5622 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5623 res = check_condition_result;
5624 goto fini;
5625 }
5626
5627 zbc_rwp_zone(devip, zsp);
5628fini:
5629 sdeb_meta_write_unlock(sip);
5630 return res;
5631}
5632
5633static u32 get_tag(struct scsi_cmnd *cmnd)
5634{
5635 return blk_mq_unique_tag(scsi_cmd_to_rq(cmnd));
5636}
5637
5638/* Queued (deferred) command completions converge here. */
5639static void sdebug_q_cmd_complete(struct sdebug_defer *sd_dp)
5640{
5641 struct sdebug_queued_cmd *sqcp = container_of(sd_dp, struct sdebug_queued_cmd, sd_dp);
5642 unsigned long flags;
5643 struct scsi_cmnd *scp = sqcp->scmd;
5644 struct sdebug_scsi_cmd *sdsc;
5645 bool aborted;
5646
5647 if (sdebug_statistics) {
5648 atomic_inc(&sdebug_completions);
5649 if (raw_smp_processor_id() != sd_dp->issuing_cpu)
5650 atomic_inc(&sdebug_miss_cpus);
5651 }
5652
5653 if (!scp) {
5654 pr_err("scmd=NULL\n");
5655 goto out;
5656 }
5657
5658 sdsc = scsi_cmd_priv(scp);
5659 spin_lock_irqsave(&sdsc->lock, flags);
5660 aborted = sd_dp->aborted;
5661 if (unlikely(aborted))
5662 sd_dp->aborted = false;
5663 ASSIGN_QUEUED_CMD(scp, NULL);
5664
5665 spin_unlock_irqrestore(&sdsc->lock, flags);
5666
5667 if (aborted) {
5668 pr_info("bypassing scsi_done() due to aborted cmd, kicking-off EH\n");
5669 blk_abort_request(scsi_cmd_to_rq(scp));
5670 goto out;
5671 }
5672
5673 scsi_done(scp); /* callback to mid level */
5674out:
5675 sdebug_free_queued_cmd(sqcp);
5676}
5677
5678/* When high resolution timer goes off this function is called. */
5679static enum hrtimer_restart sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
5680{
5681 struct sdebug_defer *sd_dp = container_of(timer, struct sdebug_defer,
5682 hrt);
5683 sdebug_q_cmd_complete(sd_dp);
5684 return HRTIMER_NORESTART;
5685}
5686
5687/* When work queue schedules work, it calls this function. */
5688static void sdebug_q_cmd_wq_complete(struct work_struct *work)
5689{
5690 struct sdebug_defer *sd_dp = container_of(work, struct sdebug_defer,
5691 ew.work);
5692 sdebug_q_cmd_complete(sd_dp);
5693}
5694
5695static bool got_shared_uuid;
5696static uuid_t shared_uuid;
5697
5698static int sdebug_device_create_zones(struct sdebug_dev_info *devip)
5699{
5700 struct sdeb_zone_state *zsp;
5701 sector_t capacity = get_sdebug_capacity();
5702 sector_t conv_capacity;
5703 sector_t zstart = 0;
5704 unsigned int i;
5705
5706 /*
5707 * Set the zone size: if sdeb_zbc_zone_size_mb is not set, figure out
5708 * a zone size allowing for at least 4 zones on the device. Otherwise,
5709 * use the specified zone size checking that at least 2 zones can be
5710 * created for the device.
5711 */
5712 if (!sdeb_zbc_zone_size_mb) {
5713 devip->zsize = (DEF_ZBC_ZONE_SIZE_MB * SZ_1M)
5714 >> ilog2(sdebug_sector_size);
5715 while (capacity < devip->zsize << 2 && devip->zsize >= 2)
5716 devip->zsize >>= 1;
5717 if (devip->zsize < 2) {
5718 pr_err("Device capacity too small\n");
5719 return -EINVAL;
5720 }
5721 } else {
5722 if (!is_power_of_2(sdeb_zbc_zone_size_mb)) {
5723 pr_err("Zone size is not a power of 2\n");
5724 return -EINVAL;
5725 }
5726 devip->zsize = (sdeb_zbc_zone_size_mb * SZ_1M)
5727 >> ilog2(sdebug_sector_size);
5728 if (devip->zsize >= capacity) {
5729 pr_err("Zone size too large for device capacity\n");
5730 return -EINVAL;
5731 }
5732 }
5733
5734 devip->zsize_shift = ilog2(devip->zsize);
5735 devip->nr_zones = (capacity + devip->zsize - 1) >> devip->zsize_shift;
5736
5737 if (sdeb_zbc_zone_cap_mb == 0) {
5738 devip->zcap = devip->zsize;
5739 } else {
5740 devip->zcap = (sdeb_zbc_zone_cap_mb * SZ_1M) >>
5741 ilog2(sdebug_sector_size);
5742 if (devip->zcap > devip->zsize) {
5743 pr_err("Zone capacity too large\n");
5744 return -EINVAL;
5745 }
5746 }
5747
5748 conv_capacity = (sector_t)sdeb_zbc_nr_conv << devip->zsize_shift;
5749 if (conv_capacity >= capacity) {
5750 pr_err("Number of conventional zones too large\n");
5751 return -EINVAL;
5752 }
5753 devip->nr_conv_zones = sdeb_zbc_nr_conv;
5754 devip->nr_seq_zones = ALIGN(capacity - conv_capacity, devip->zsize) >>
5755 devip->zsize_shift;
5756 devip->nr_zones = devip->nr_conv_zones + devip->nr_seq_zones;
5757
5758 /* Add gap zones if zone capacity is smaller than the zone size */
5759 if (devip->zcap < devip->zsize)
5760 devip->nr_zones += devip->nr_seq_zones;
5761
5762 if (devip->zoned) {
5763 /* zbc_max_open_zones can be 0, meaning "not reported" */
5764 if (sdeb_zbc_max_open >= devip->nr_zones - 1)
5765 devip->max_open = (devip->nr_zones - 1) / 2;
5766 else
5767 devip->max_open = sdeb_zbc_max_open;
5768 }
5769
5770 devip->zstate = kcalloc(devip->nr_zones,
5771 sizeof(struct sdeb_zone_state), GFP_KERNEL);
5772 if (!devip->zstate)
5773 return -ENOMEM;
5774
5775 for (i = 0; i < devip->nr_zones; i++) {
5776 zsp = &devip->zstate[i];
5777
5778 zsp->z_start = zstart;
5779
5780 if (i < devip->nr_conv_zones) {
5781 zsp->z_type = ZBC_ZTYPE_CNV;
5782 zsp->z_cond = ZBC_NOT_WRITE_POINTER;
5783 zsp->z_wp = (sector_t)-1;
5784 zsp->z_size =
5785 min_t(u64, devip->zsize, capacity - zstart);
5786 } else if ((zstart & (devip->zsize - 1)) == 0) {
5787 if (devip->zoned)
5788 zsp->z_type = ZBC_ZTYPE_SWR;
5789 else
5790 zsp->z_type = ZBC_ZTYPE_SWP;
5791 zsp->z_cond = ZC1_EMPTY;
5792 zsp->z_wp = zsp->z_start;
5793 zsp->z_size =
5794 min_t(u64, devip->zcap, capacity - zstart);
5795 } else {
5796 zsp->z_type = ZBC_ZTYPE_GAP;
5797 zsp->z_cond = ZBC_NOT_WRITE_POINTER;
5798 zsp->z_wp = (sector_t)-1;
5799 zsp->z_size = min_t(u64, devip->zsize - devip->zcap,
5800 capacity - zstart);
5801 }
5802
5803 WARN_ON_ONCE((int)zsp->z_size <= 0);
5804 zstart += zsp->z_size;
5805 }
5806
5807 return 0;
5808}
5809
5810static struct sdebug_dev_info *sdebug_device_create(
5811 struct sdebug_host_info *sdbg_host, gfp_t flags)
5812{
5813 struct sdebug_dev_info *devip;
5814
5815 devip = kzalloc(sizeof(*devip), flags);
5816 if (devip) {
5817 if (sdebug_uuid_ctl == 1)
5818 uuid_gen(&devip->lu_name);
5819 else if (sdebug_uuid_ctl == 2) {
5820 if (got_shared_uuid)
5821 devip->lu_name = shared_uuid;
5822 else {
5823 uuid_gen(&shared_uuid);
5824 got_shared_uuid = true;
5825 devip->lu_name = shared_uuid;
5826 }
5827 }
5828 devip->sdbg_host = sdbg_host;
5829 if (sdeb_zbc_in_use) {
5830 devip->zoned = sdeb_zbc_model == BLK_ZONED_HM;
5831 if (sdebug_device_create_zones(devip)) {
5832 kfree(devip);
5833 return NULL;
5834 }
5835 } else {
5836 devip->zoned = false;
5837 }
5838 devip->create_ts = ktime_get_boottime();
5839 atomic_set(&devip->stopped, (sdeb_tur_ms_to_ready > 0 ? 2 : 0));
5840 spin_lock_init(&devip->list_lock);
5841 INIT_LIST_HEAD(&devip->inject_err_list);
5842 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
5843 }
5844 return devip;
5845}
5846
5847static struct sdebug_dev_info *find_build_dev_info(struct scsi_device *sdev)
5848{
5849 struct sdebug_host_info *sdbg_host;
5850 struct sdebug_dev_info *open_devip = NULL;
5851 struct sdebug_dev_info *devip;
5852
5853 sdbg_host = shost_to_sdebug_host(sdev->host);
5854
5855 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
5856 if ((devip->used) && (devip->channel == sdev->channel) &&
5857 (devip->target == sdev->id) &&
5858 (devip->lun == sdev->lun))
5859 return devip;
5860 else {
5861 if ((!devip->used) && (!open_devip))
5862 open_devip = devip;
5863 }
5864 }
5865 if (!open_devip) { /* try and make a new one */
5866 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
5867 if (!open_devip) {
5868 pr_err("out of memory at line %d\n", __LINE__);
5869 return NULL;
5870 }
5871 }
5872
5873 open_devip->channel = sdev->channel;
5874 open_devip->target = sdev->id;
5875 open_devip->lun = sdev->lun;
5876 open_devip->sdbg_host = sdbg_host;
5877 set_bit(SDEBUG_UA_POOCCUR, open_devip->uas_bm);
5878 open_devip->used = true;
5879 return open_devip;
5880}
5881
5882static int scsi_debug_slave_alloc(struct scsi_device *sdp)
5883{
5884 if (sdebug_verbose)
5885 pr_info("slave_alloc <%u %u %u %llu>\n",
5886 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
5887
5888 return 0;
5889}
5890
5891static int scsi_debug_slave_configure(struct scsi_device *sdp)
5892{
5893 struct sdebug_dev_info *devip =
5894 (struct sdebug_dev_info *)sdp->hostdata;
5895 struct dentry *dentry;
5896
5897 if (sdebug_verbose)
5898 pr_info("slave_configure <%u %u %u %llu>\n",
5899 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
5900 if (sdp->host->max_cmd_len != SDEBUG_MAX_CMD_LEN)
5901 sdp->host->max_cmd_len = SDEBUG_MAX_CMD_LEN;
5902 if (devip == NULL) {
5903 devip = find_build_dev_info(sdp);
5904 if (devip == NULL)
5905 return 1; /* no resources, will be marked offline */
5906 }
5907 sdp->hostdata = devip;
5908 if (sdebug_no_uld)
5909 sdp->no_uld_attach = 1;
5910 config_cdb_len(sdp);
5911
5912 if (sdebug_allow_restart)
5913 sdp->allow_restart = 1;
5914
5915 devip->debugfs_entry = debugfs_create_dir(dev_name(&sdp->sdev_dev),
5916 sdebug_debugfs_root);
5917 if (IS_ERR_OR_NULL(devip->debugfs_entry))
5918 pr_info("%s: failed to create debugfs directory for device %s\n",
5919 __func__, dev_name(&sdp->sdev_gendev));
5920
5921 dentry = debugfs_create_file("error", 0600, devip->debugfs_entry, sdp,
5922 &sdebug_error_fops);
5923 if (IS_ERR_OR_NULL(dentry))
5924 pr_info("%s: failed to create error file for device %s\n",
5925 __func__, dev_name(&sdp->sdev_gendev));
5926
5927 return 0;
5928}
5929
5930static void scsi_debug_slave_destroy(struct scsi_device *sdp)
5931{
5932 struct sdebug_dev_info *devip =
5933 (struct sdebug_dev_info *)sdp->hostdata;
5934 struct sdebug_err_inject *err;
5935
5936 if (sdebug_verbose)
5937 pr_info("slave_destroy <%u %u %u %llu>\n",
5938 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
5939
5940 if (!devip)
5941 return;
5942
5943 spin_lock(&devip->list_lock);
5944 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
5945 list_del_rcu(&err->list);
5946 call_rcu(&err->rcu, sdebug_err_free);
5947 }
5948 spin_unlock(&devip->list_lock);
5949
5950 debugfs_remove(devip->debugfs_entry);
5951
5952 /* make this slot available for re-use */
5953 devip->used = false;
5954 sdp->hostdata = NULL;
5955}
5956
5957/* Returns true if we require the queued memory to be freed by the caller. */
5958static bool stop_qc_helper(struct sdebug_defer *sd_dp,
5959 enum sdeb_defer_type defer_t)
5960{
5961 if (defer_t == SDEB_DEFER_HRT) {
5962 int res = hrtimer_try_to_cancel(&sd_dp->hrt);
5963
5964 switch (res) {
5965 case 0: /* Not active, it must have already run */
5966 case -1: /* -1 It's executing the CB */
5967 return false;
5968 case 1: /* Was active, we've now cancelled */
5969 default:
5970 return true;
5971 }
5972 } else if (defer_t == SDEB_DEFER_WQ) {
5973 /* Cancel if pending */
5974 if (cancel_work_sync(&sd_dp->ew.work))
5975 return true;
5976 /* Was not pending, so it must have run */
5977 return false;
5978 } else if (defer_t == SDEB_DEFER_POLL) {
5979 return true;
5980 }
5981
5982 return false;
5983}
5984
5985
5986static bool scsi_debug_stop_cmnd(struct scsi_cmnd *cmnd)
5987{
5988 enum sdeb_defer_type l_defer_t;
5989 struct sdebug_defer *sd_dp;
5990 struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmnd);
5991 struct sdebug_queued_cmd *sqcp = TO_QUEUED_CMD(cmnd);
5992
5993 lockdep_assert_held(&sdsc->lock);
5994
5995 if (!sqcp)
5996 return false;
5997 sd_dp = &sqcp->sd_dp;
5998 l_defer_t = READ_ONCE(sd_dp->defer_t);
5999 ASSIGN_QUEUED_CMD(cmnd, NULL);
6000
6001 if (stop_qc_helper(sd_dp, l_defer_t))
6002 sdebug_free_queued_cmd(sqcp);
6003
6004 return true;
6005}
6006
6007/*
6008 * Called from scsi_debug_abort() only, which is for timed-out cmd.
6009 */
6010static bool scsi_debug_abort_cmnd(struct scsi_cmnd *cmnd)
6011{
6012 struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmnd);
6013 unsigned long flags;
6014 bool res;
6015
6016 spin_lock_irqsave(&sdsc->lock, flags);
6017 res = scsi_debug_stop_cmnd(cmnd);
6018 spin_unlock_irqrestore(&sdsc->lock, flags);
6019
6020 return res;
6021}
6022
6023/*
6024 * All we can do is set the cmnd as internally aborted and wait for it to
6025 * finish. We cannot call scsi_done() as normal completion path may do that.
6026 */
6027static bool sdebug_stop_cmnd(struct request *rq, void *data)
6028{
6029 scsi_debug_abort_cmnd(blk_mq_rq_to_pdu(rq));
6030
6031 return true;
6032}
6033
6034/* Deletes (stops) timers or work queues of all queued commands */
6035static void stop_all_queued(void)
6036{
6037 struct sdebug_host_info *sdhp;
6038
6039 mutex_lock(&sdebug_host_list_mutex);
6040 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
6041 struct Scsi_Host *shost = sdhp->shost;
6042
6043 blk_mq_tagset_busy_iter(&shost->tag_set, sdebug_stop_cmnd, NULL);
6044 }
6045 mutex_unlock(&sdebug_host_list_mutex);
6046}
6047
6048static int sdebug_fail_abort(struct scsi_cmnd *cmnd)
6049{
6050 struct scsi_device *sdp = cmnd->device;
6051 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
6052 struct sdebug_err_inject *err;
6053 unsigned char *cmd = cmnd->cmnd;
6054 int ret = 0;
6055
6056 if (devip == NULL)
6057 return 0;
6058
6059 rcu_read_lock();
6060 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
6061 if (err->type == ERR_ABORT_CMD_FAILED &&
6062 (err->cmd == cmd[0] || err->cmd == 0xff)) {
6063 ret = !!err->cnt;
6064 if (err->cnt < 0)
6065 err->cnt++;
6066
6067 rcu_read_unlock();
6068 return ret;
6069 }
6070 }
6071 rcu_read_unlock();
6072
6073 return 0;
6074}
6075
6076static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
6077{
6078 bool ok = scsi_debug_abort_cmnd(SCpnt);
6079 u8 *cmd = SCpnt->cmnd;
6080 u8 opcode = cmd[0];
6081
6082 ++num_aborts;
6083
6084 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
6085 sdev_printk(KERN_INFO, SCpnt->device,
6086 "%s: command%s found\n", __func__,
6087 ok ? "" : " not");
6088
6089 if (sdebug_fail_abort(SCpnt)) {
6090 scmd_printk(KERN_INFO, SCpnt, "fail abort command 0x%x\n",
6091 opcode);
6092 return FAILED;
6093 }
6094
6095 return SUCCESS;
6096}
6097
6098static bool scsi_debug_stop_all_queued_iter(struct request *rq, void *data)
6099{
6100 struct scsi_device *sdp = data;
6101 struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq);
6102
6103 if (scmd->device == sdp)
6104 scsi_debug_abort_cmnd(scmd);
6105
6106 return true;
6107}
6108
6109/* Deletes (stops) timers or work queues of all queued commands per sdev */
6110static void scsi_debug_stop_all_queued(struct scsi_device *sdp)
6111{
6112 struct Scsi_Host *shost = sdp->host;
6113
6114 blk_mq_tagset_busy_iter(&shost->tag_set,
6115 scsi_debug_stop_all_queued_iter, sdp);
6116}
6117
6118static int sdebug_fail_lun_reset(struct scsi_cmnd *cmnd)
6119{
6120 struct scsi_device *sdp = cmnd->device;
6121 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
6122 struct sdebug_err_inject *err;
6123 unsigned char *cmd = cmnd->cmnd;
6124 int ret = 0;
6125
6126 if (devip == NULL)
6127 return 0;
6128
6129 rcu_read_lock();
6130 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
6131 if (err->type == ERR_LUN_RESET_FAILED &&
6132 (err->cmd == cmd[0] || err->cmd == 0xff)) {
6133 ret = !!err->cnt;
6134 if (err->cnt < 0)
6135 err->cnt++;
6136
6137 rcu_read_unlock();
6138 return ret;
6139 }
6140 }
6141 rcu_read_unlock();
6142
6143 return 0;
6144}
6145
6146static int scsi_debug_device_reset(struct scsi_cmnd *SCpnt)
6147{
6148 struct scsi_device *sdp = SCpnt->device;
6149 struct sdebug_dev_info *devip = sdp->hostdata;
6150 u8 *cmd = SCpnt->cmnd;
6151 u8 opcode = cmd[0];
6152
6153 ++num_dev_resets;
6154
6155 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
6156 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
6157
6158 scsi_debug_stop_all_queued(sdp);
6159 if (devip)
6160 set_bit(SDEBUG_UA_POR, devip->uas_bm);
6161
6162 if (sdebug_fail_lun_reset(SCpnt)) {
6163 scmd_printk(KERN_INFO, SCpnt, "fail lun reset 0x%x\n", opcode);
6164 return FAILED;
6165 }
6166
6167 return SUCCESS;
6168}
6169
6170static int sdebug_fail_target_reset(struct scsi_cmnd *cmnd)
6171{
6172 struct scsi_target *starget = scsi_target(cmnd->device);
6173 struct sdebug_target_info *targetip =
6174 (struct sdebug_target_info *)starget->hostdata;
6175
6176 if (targetip)
6177 return targetip->reset_fail;
6178
6179 return 0;
6180}
6181
6182static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
6183{
6184 struct scsi_device *sdp = SCpnt->device;
6185 struct sdebug_host_info *sdbg_host = shost_to_sdebug_host(sdp->host);
6186 struct sdebug_dev_info *devip;
6187 u8 *cmd = SCpnt->cmnd;
6188 u8 opcode = cmd[0];
6189 int k = 0;
6190
6191 ++num_target_resets;
6192 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
6193 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
6194
6195 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
6196 if (devip->target == sdp->id) {
6197 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
6198 ++k;
6199 }
6200 }
6201
6202 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
6203 sdev_printk(KERN_INFO, sdp,
6204 "%s: %d device(s) found in target\n", __func__, k);
6205
6206 if (sdebug_fail_target_reset(SCpnt)) {
6207 scmd_printk(KERN_INFO, SCpnt, "fail target reset 0x%x\n",
6208 opcode);
6209 return FAILED;
6210 }
6211
6212 return SUCCESS;
6213}
6214
6215static int scsi_debug_bus_reset(struct scsi_cmnd *SCpnt)
6216{
6217 struct scsi_device *sdp = SCpnt->device;
6218 struct sdebug_host_info *sdbg_host = shost_to_sdebug_host(sdp->host);
6219 struct sdebug_dev_info *devip;
6220 int k = 0;
6221
6222 ++num_bus_resets;
6223
6224 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
6225 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
6226
6227 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
6228 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
6229 ++k;
6230 }
6231
6232 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
6233 sdev_printk(KERN_INFO, sdp,
6234 "%s: %d device(s) found in host\n", __func__, k);
6235 return SUCCESS;
6236}
6237
6238static int scsi_debug_host_reset(struct scsi_cmnd *SCpnt)
6239{
6240 struct sdebug_host_info *sdbg_host;
6241 struct sdebug_dev_info *devip;
6242 int k = 0;
6243
6244 ++num_host_resets;
6245 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
6246 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
6247 mutex_lock(&sdebug_host_list_mutex);
6248 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
6249 list_for_each_entry(devip, &sdbg_host->dev_info_list,
6250 dev_list) {
6251 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
6252 ++k;
6253 }
6254 }
6255 mutex_unlock(&sdebug_host_list_mutex);
6256 stop_all_queued();
6257 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
6258 sdev_printk(KERN_INFO, SCpnt->device,
6259 "%s: %d device(s) found\n", __func__, k);
6260 return SUCCESS;
6261}
6262
6263static void sdebug_build_parts(unsigned char *ramp, unsigned long store_size)
6264{
6265 struct msdos_partition *pp;
6266 int starts[SDEBUG_MAX_PARTS + 2], max_part_secs;
6267 int sectors_per_part, num_sectors, k;
6268 int heads_by_sects, start_sec, end_sec;
6269
6270 /* assume partition table already zeroed */
6271 if ((sdebug_num_parts < 1) || (store_size < 1048576))
6272 return;
6273 if (sdebug_num_parts > SDEBUG_MAX_PARTS) {
6274 sdebug_num_parts = SDEBUG_MAX_PARTS;
6275 pr_warn("reducing partitions to %d\n", SDEBUG_MAX_PARTS);
6276 }
6277 num_sectors = (int)get_sdebug_capacity();
6278 sectors_per_part = (num_sectors - sdebug_sectors_per)
6279 / sdebug_num_parts;
6280 heads_by_sects = sdebug_heads * sdebug_sectors_per;
6281 starts[0] = sdebug_sectors_per;
6282 max_part_secs = sectors_per_part;
6283 for (k = 1; k < sdebug_num_parts; ++k) {
6284 starts[k] = ((k * sectors_per_part) / heads_by_sects)
6285 * heads_by_sects;
6286 if (starts[k] - starts[k - 1] < max_part_secs)
6287 max_part_secs = starts[k] - starts[k - 1];
6288 }
6289 starts[sdebug_num_parts] = num_sectors;
6290 starts[sdebug_num_parts + 1] = 0;
6291
6292 ramp[510] = 0x55; /* magic partition markings */
6293 ramp[511] = 0xAA;
6294 pp = (struct msdos_partition *)(ramp + 0x1be);
6295 for (k = 0; starts[k + 1]; ++k, ++pp) {
6296 start_sec = starts[k];
6297 end_sec = starts[k] + max_part_secs - 1;
6298 pp->boot_ind = 0;
6299
6300 pp->cyl = start_sec / heads_by_sects;
6301 pp->head = (start_sec - (pp->cyl * heads_by_sects))
6302 / sdebug_sectors_per;
6303 pp->sector = (start_sec % sdebug_sectors_per) + 1;
6304
6305 pp->end_cyl = end_sec / heads_by_sects;
6306 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
6307 / sdebug_sectors_per;
6308 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
6309
6310 pp->start_sect = cpu_to_le32(start_sec);
6311 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
6312 pp->sys_ind = 0x83; /* plain Linux partition */
6313 }
6314}
6315
6316static void block_unblock_all_queues(bool block)
6317{
6318 struct sdebug_host_info *sdhp;
6319
6320 lockdep_assert_held(&sdebug_host_list_mutex);
6321
6322 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
6323 struct Scsi_Host *shost = sdhp->shost;
6324
6325 if (block)
6326 scsi_block_requests(shost);
6327 else
6328 scsi_unblock_requests(shost);
6329 }
6330}
6331
6332/* Adjust (by rounding down) the sdebug_cmnd_count so abs(every_nth)-1
6333 * commands will be processed normally before triggers occur.
6334 */
6335static void tweak_cmnd_count(void)
6336{
6337 int count, modulo;
6338
6339 modulo = abs(sdebug_every_nth);
6340 if (modulo < 2)
6341 return;
6342
6343 mutex_lock(&sdebug_host_list_mutex);
6344 block_unblock_all_queues(true);
6345 count = atomic_read(&sdebug_cmnd_count);
6346 atomic_set(&sdebug_cmnd_count, (count / modulo) * modulo);
6347 block_unblock_all_queues(false);
6348 mutex_unlock(&sdebug_host_list_mutex);
6349}
6350
6351static void clear_queue_stats(void)
6352{
6353 atomic_set(&sdebug_cmnd_count, 0);
6354 atomic_set(&sdebug_completions, 0);
6355 atomic_set(&sdebug_miss_cpus, 0);
6356 atomic_set(&sdebug_a_tsf, 0);
6357}
6358
6359static bool inject_on_this_cmd(void)
6360{
6361 if (sdebug_every_nth == 0)
6362 return false;
6363 return (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth)) == 0;
6364}
6365
6366#define INCLUSIVE_TIMING_MAX_NS 1000000 /* 1 millisecond */
6367
6368
6369void sdebug_free_queued_cmd(struct sdebug_queued_cmd *sqcp)
6370{
6371 if (sqcp)
6372 kmem_cache_free(queued_cmd_cache, sqcp);
6373}
6374
6375static struct sdebug_queued_cmd *sdebug_alloc_queued_cmd(struct scsi_cmnd *scmd)
6376{
6377 struct sdebug_queued_cmd *sqcp;
6378 struct sdebug_defer *sd_dp;
6379
6380 sqcp = kmem_cache_zalloc(queued_cmd_cache, GFP_ATOMIC);
6381 if (!sqcp)
6382 return NULL;
6383
6384 sd_dp = &sqcp->sd_dp;
6385
6386 hrtimer_init(&sd_dp->hrt, CLOCK_MONOTONIC, HRTIMER_MODE_REL_PINNED);
6387 sd_dp->hrt.function = sdebug_q_cmd_hrt_complete;
6388 INIT_WORK(&sd_dp->ew.work, sdebug_q_cmd_wq_complete);
6389
6390 sqcp->scmd = scmd;
6391
6392 return sqcp;
6393}
6394
6395/* Complete the processing of the thread that queued a SCSI command to this
6396 * driver. It either completes the command by calling cmnd_done() or
6397 * schedules a hr timer or work queue then returns 0. Returns
6398 * SCSI_MLQUEUE_HOST_BUSY if temporarily out of resources.
6399 */
6400static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
6401 int scsi_result,
6402 int (*pfp)(struct scsi_cmnd *,
6403 struct sdebug_dev_info *),
6404 int delta_jiff, int ndelay)
6405{
6406 struct request *rq = scsi_cmd_to_rq(cmnd);
6407 bool polled = rq->cmd_flags & REQ_POLLED;
6408 struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmnd);
6409 unsigned long flags;
6410 u64 ns_from_boot = 0;
6411 struct sdebug_queued_cmd *sqcp;
6412 struct scsi_device *sdp;
6413 struct sdebug_defer *sd_dp;
6414
6415 if (unlikely(devip == NULL)) {
6416 if (scsi_result == 0)
6417 scsi_result = DID_NO_CONNECT << 16;
6418 goto respond_in_thread;
6419 }
6420 sdp = cmnd->device;
6421
6422 if (delta_jiff == 0)
6423 goto respond_in_thread;
6424
6425
6426 if (unlikely(sdebug_every_nth && (SDEBUG_OPT_RARE_TSF & sdebug_opts) &&
6427 (scsi_result == 0))) {
6428 int num_in_q = scsi_device_busy(sdp);
6429 int qdepth = cmnd->device->queue_depth;
6430
6431 if ((num_in_q == qdepth) &&
6432 (atomic_inc_return(&sdebug_a_tsf) >=
6433 abs(sdebug_every_nth))) {
6434 atomic_set(&sdebug_a_tsf, 0);
6435 scsi_result = device_qfull_result;
6436
6437 if (unlikely(SDEBUG_OPT_Q_NOISE & sdebug_opts))
6438 sdev_printk(KERN_INFO, sdp, "%s: num_in_q=%d +1, <inject> status: TASK SET FULL\n",
6439 __func__, num_in_q);
6440 }
6441 }
6442
6443 sqcp = sdebug_alloc_queued_cmd(cmnd);
6444 if (!sqcp) {
6445 pr_err("%s no alloc\n", __func__);
6446 return SCSI_MLQUEUE_HOST_BUSY;
6447 }
6448 sd_dp = &sqcp->sd_dp;
6449
6450 if (polled || (ndelay > 0 && ndelay < INCLUSIVE_TIMING_MAX_NS))
6451 ns_from_boot = ktime_get_boottime_ns();
6452
6453 /* one of the resp_*() response functions is called here */
6454 cmnd->result = pfp ? pfp(cmnd, devip) : 0;
6455 if (cmnd->result & SDEG_RES_IMMED_MASK) {
6456 cmnd->result &= ~SDEG_RES_IMMED_MASK;
6457 delta_jiff = ndelay = 0;
6458 }
6459 if (cmnd->result == 0 && scsi_result != 0)
6460 cmnd->result = scsi_result;
6461 if (cmnd->result == 0 && unlikely(sdebug_opts & SDEBUG_OPT_TRANSPORT_ERR)) {
6462 if (atomic_read(&sdeb_inject_pending)) {
6463 mk_sense_buffer(cmnd, ABORTED_COMMAND, TRANSPORT_PROBLEM, ACK_NAK_TO);
6464 atomic_set(&sdeb_inject_pending, 0);
6465 cmnd->result = check_condition_result;
6466 }
6467 }
6468
6469 if (unlikely(sdebug_verbose && cmnd->result))
6470 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
6471 __func__, cmnd->result);
6472
6473 if (delta_jiff > 0 || ndelay > 0) {
6474 ktime_t kt;
6475
6476 if (delta_jiff > 0) {
6477 u64 ns = jiffies_to_nsecs(delta_jiff);
6478
6479 if (sdebug_random && ns < U32_MAX) {
6480 ns = get_random_u32_below((u32)ns);
6481 } else if (sdebug_random) {
6482 ns >>= 12; /* scale to 4 usec precision */
6483 if (ns < U32_MAX) /* over 4 hours max */
6484 ns = get_random_u32_below((u32)ns);
6485 ns <<= 12;
6486 }
6487 kt = ns_to_ktime(ns);
6488 } else { /* ndelay has a 4.2 second max */
6489 kt = sdebug_random ? get_random_u32_below((u32)ndelay) :
6490 (u32)ndelay;
6491 if (ndelay < INCLUSIVE_TIMING_MAX_NS) {
6492 u64 d = ktime_get_boottime_ns() - ns_from_boot;
6493
6494 if (kt <= d) { /* elapsed duration >= kt */
6495 /* call scsi_done() from this thread */
6496 sdebug_free_queued_cmd(sqcp);
6497 scsi_done(cmnd);
6498 return 0;
6499 }
6500 /* otherwise reduce kt by elapsed time */
6501 kt -= d;
6502 }
6503 }
6504 if (sdebug_statistics)
6505 sd_dp->issuing_cpu = raw_smp_processor_id();
6506 if (polled) {
6507 spin_lock_irqsave(&sdsc->lock, flags);
6508 sd_dp->cmpl_ts = ktime_add(ns_to_ktime(ns_from_boot), kt);
6509 ASSIGN_QUEUED_CMD(cmnd, sqcp);
6510 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_POLL);
6511 spin_unlock_irqrestore(&sdsc->lock, flags);
6512 } else {
6513 /* schedule the invocation of scsi_done() for a later time */
6514 spin_lock_irqsave(&sdsc->lock, flags);
6515 ASSIGN_QUEUED_CMD(cmnd, sqcp);
6516 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_HRT);
6517 hrtimer_start(&sd_dp->hrt, kt, HRTIMER_MODE_REL_PINNED);
6518 /*
6519 * The completion handler will try to grab sqcp->lock,
6520 * so there is no chance that the completion handler
6521 * will call scsi_done() until we release the lock
6522 * here (so ok to keep referencing sdsc).
6523 */
6524 spin_unlock_irqrestore(&sdsc->lock, flags);
6525 }
6526 } else { /* jdelay < 0, use work queue */
6527 if (unlikely((sdebug_opts & SDEBUG_OPT_CMD_ABORT) &&
6528 atomic_read(&sdeb_inject_pending))) {
6529 sd_dp->aborted = true;
6530 atomic_set(&sdeb_inject_pending, 0);
6531 sdev_printk(KERN_INFO, sdp, "abort request tag=%#x\n",
6532 blk_mq_unique_tag_to_tag(get_tag(cmnd)));
6533 }
6534
6535 if (sdebug_statistics)
6536 sd_dp->issuing_cpu = raw_smp_processor_id();
6537 if (polled) {
6538 spin_lock_irqsave(&sdsc->lock, flags);
6539 ASSIGN_QUEUED_CMD(cmnd, sqcp);
6540 sd_dp->cmpl_ts = ns_to_ktime(ns_from_boot);
6541 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_POLL);
6542 spin_unlock_irqrestore(&sdsc->lock, flags);
6543 } else {
6544 spin_lock_irqsave(&sdsc->lock, flags);
6545 ASSIGN_QUEUED_CMD(cmnd, sqcp);
6546 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_WQ);
6547 schedule_work(&sd_dp->ew.work);
6548 spin_unlock_irqrestore(&sdsc->lock, flags);
6549 }
6550 }
6551
6552 return 0;
6553
6554respond_in_thread: /* call back to mid-layer using invocation thread */
6555 cmnd->result = pfp != NULL ? pfp(cmnd, devip) : 0;
6556 cmnd->result &= ~SDEG_RES_IMMED_MASK;
6557 if (cmnd->result == 0 && scsi_result != 0)
6558 cmnd->result = scsi_result;
6559 scsi_done(cmnd);
6560 return 0;
6561}
6562
6563/* Note: The following macros create attribute files in the
6564 /sys/module/scsi_debug/parameters directory. Unfortunately this
6565 driver is unaware of a change and cannot trigger auxiliary actions
6566 as it can when the corresponding attribute in the
6567 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
6568 */
6569module_param_named(add_host, sdebug_add_host, int, S_IRUGO | S_IWUSR);
6570module_param_named(ato, sdebug_ato, int, S_IRUGO);
6571module_param_named(cdb_len, sdebug_cdb_len, int, 0644);
6572module_param_named(clustering, sdebug_clustering, bool, S_IRUGO | S_IWUSR);
6573module_param_named(delay, sdebug_jdelay, int, S_IRUGO | S_IWUSR);
6574module_param_named(dev_size_mb, sdebug_dev_size_mb, int, S_IRUGO);
6575module_param_named(dif, sdebug_dif, int, S_IRUGO);
6576module_param_named(dix, sdebug_dix, int, S_IRUGO);
6577module_param_named(dsense, sdebug_dsense, int, S_IRUGO | S_IWUSR);
6578module_param_named(every_nth, sdebug_every_nth, int, S_IRUGO | S_IWUSR);
6579module_param_named(fake_rw, sdebug_fake_rw, int, S_IRUGO | S_IWUSR);
6580module_param_named(guard, sdebug_guard, uint, S_IRUGO);
6581module_param_named(host_lock, sdebug_host_lock, bool, S_IRUGO | S_IWUSR);
6582module_param_named(host_max_queue, sdebug_host_max_queue, int, S_IRUGO);
6583module_param_string(inq_product, sdebug_inq_product_id,
6584 sizeof(sdebug_inq_product_id), S_IRUGO | S_IWUSR);
6585module_param_string(inq_rev, sdebug_inq_product_rev,
6586 sizeof(sdebug_inq_product_rev), S_IRUGO | S_IWUSR);
6587module_param_string(inq_vendor, sdebug_inq_vendor_id,
6588 sizeof(sdebug_inq_vendor_id), S_IRUGO | S_IWUSR);
6589module_param_named(lbprz, sdebug_lbprz, int, S_IRUGO);
6590module_param_named(lbpu, sdebug_lbpu, int, S_IRUGO);
6591module_param_named(lbpws, sdebug_lbpws, int, S_IRUGO);
6592module_param_named(lbpws10, sdebug_lbpws10, int, S_IRUGO);
6593module_param_named(atomic_wr, sdebug_atomic_wr, int, S_IRUGO);
6594module_param_named(lowest_aligned, sdebug_lowest_aligned, int, S_IRUGO);
6595module_param_named(lun_format, sdebug_lun_am_i, int, S_IRUGO | S_IWUSR);
6596module_param_named(max_luns, sdebug_max_luns, int, S_IRUGO | S_IWUSR);
6597module_param_named(max_queue, sdebug_max_queue, int, S_IRUGO | S_IWUSR);
6598module_param_named(medium_error_count, sdebug_medium_error_count, int,
6599 S_IRUGO | S_IWUSR);
6600module_param_named(medium_error_start, sdebug_medium_error_start, int,
6601 S_IRUGO | S_IWUSR);
6602module_param_named(ndelay, sdebug_ndelay, int, S_IRUGO | S_IWUSR);
6603module_param_named(no_lun_0, sdebug_no_lun_0, int, S_IRUGO | S_IWUSR);
6604module_param_named(no_rwlock, sdebug_no_rwlock, bool, S_IRUGO | S_IWUSR);
6605module_param_named(no_uld, sdebug_no_uld, int, S_IRUGO);
6606module_param_named(num_parts, sdebug_num_parts, int, S_IRUGO);
6607module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR);
6608module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO);
6609module_param_named(opt_xferlen_exp, sdebug_opt_xferlen_exp, int, S_IRUGO);
6610module_param_named(opts, sdebug_opts, int, S_IRUGO | S_IWUSR);
6611module_param_named(per_host_store, sdebug_per_host_store, bool,
6612 S_IRUGO | S_IWUSR);
6613module_param_named(physblk_exp, sdebug_physblk_exp, int, S_IRUGO);
6614module_param_named(ptype, sdebug_ptype, int, S_IRUGO | S_IWUSR);
6615module_param_named(random, sdebug_random, bool, S_IRUGO | S_IWUSR);
6616module_param_named(removable, sdebug_removable, bool, S_IRUGO | S_IWUSR);
6617module_param_named(scsi_level, sdebug_scsi_level, int, S_IRUGO);
6618module_param_named(sector_size, sdebug_sector_size, int, S_IRUGO);
6619module_param_named(statistics, sdebug_statistics, bool, S_IRUGO | S_IWUSR);
6620module_param_named(strict, sdebug_strict, bool, S_IRUGO | S_IWUSR);
6621module_param_named(submit_queues, submit_queues, int, S_IRUGO);
6622module_param_named(poll_queues, poll_queues, int, S_IRUGO);
6623module_param_named(tur_ms_to_ready, sdeb_tur_ms_to_ready, int, S_IRUGO);
6624module_param_named(unmap_alignment, sdebug_unmap_alignment, int, S_IRUGO);
6625module_param_named(unmap_granularity, sdebug_unmap_granularity, int, S_IRUGO);
6626module_param_named(unmap_max_blocks, sdebug_unmap_max_blocks, int, S_IRUGO);
6627module_param_named(unmap_max_desc, sdebug_unmap_max_desc, int, S_IRUGO);
6628module_param_named(atomic_wr_max_length, sdebug_atomic_wr_max_length, int, S_IRUGO);
6629module_param_named(atomic_wr_align, sdebug_atomic_wr_align, int, S_IRUGO);
6630module_param_named(atomic_wr_gran, sdebug_atomic_wr_gran, int, S_IRUGO);
6631module_param_named(atomic_wr_max_length_bndry, sdebug_atomic_wr_max_length_bndry, int, S_IRUGO);
6632module_param_named(atomic_wr_max_bndry, sdebug_atomic_wr_max_bndry, int, S_IRUGO);
6633module_param_named(uuid_ctl, sdebug_uuid_ctl, int, S_IRUGO);
6634module_param_named(virtual_gb, sdebug_virtual_gb, int, S_IRUGO | S_IWUSR);
6635module_param_named(vpd_use_hostno, sdebug_vpd_use_hostno, int,
6636 S_IRUGO | S_IWUSR);
6637module_param_named(wp, sdebug_wp, bool, S_IRUGO | S_IWUSR);
6638module_param_named(write_same_length, sdebug_write_same_length, int,
6639 S_IRUGO | S_IWUSR);
6640module_param_named(zbc, sdeb_zbc_model_s, charp, S_IRUGO);
6641module_param_named(zone_cap_mb, sdeb_zbc_zone_cap_mb, int, S_IRUGO);
6642module_param_named(zone_max_open, sdeb_zbc_max_open, int, S_IRUGO);
6643module_param_named(zone_nr_conv, sdeb_zbc_nr_conv, int, S_IRUGO);
6644module_param_named(zone_size_mb, sdeb_zbc_zone_size_mb, int, S_IRUGO);
6645module_param_named(allow_restart, sdebug_allow_restart, bool, S_IRUGO | S_IWUSR);
6646
6647MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
6648MODULE_DESCRIPTION("SCSI debug adapter driver");
6649MODULE_LICENSE("GPL");
6650MODULE_VERSION(SDEBUG_VERSION);
6651
6652MODULE_PARM_DESC(add_host, "add n hosts, in sysfs if negative remove host(s) (def=1)");
6653MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
6654MODULE_PARM_DESC(cdb_len, "suggest CDB lengths to drivers (def=10)");
6655MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
6656MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
6657MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)");
6658MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
6659MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
6660MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
6661MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
6662MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
6663MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
6664MODULE_PARM_DESC(host_lock, "host_lock is ignored (def=0)");
6665MODULE_PARM_DESC(host_max_queue,
6666 "host max # of queued cmds (0 to max(def) [max_queue fixed equal for !0])");
6667MODULE_PARM_DESC(inq_product, "SCSI INQUIRY product string (def=\"scsi_debug\")");
6668MODULE_PARM_DESC(inq_rev, "SCSI INQUIRY revision string (def=\""
6669 SDEBUG_VERSION "\")");
6670MODULE_PARM_DESC(inq_vendor, "SCSI INQUIRY vendor string (def=\"Linux\")");
6671MODULE_PARM_DESC(lbprz,
6672 "on read unmapped LBs return 0 when 1 (def), return 0xff when 2");
6673MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
6674MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
6675MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
6676MODULE_PARM_DESC(atomic_write, "enable ATOMIC WRITE support, support WRITE ATOMIC(16) (def=0)");
6677MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
6678MODULE_PARM_DESC(lun_format, "LUN format: 0->peripheral (def); 1 --> flat address method");
6679MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
6680MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
6681MODULE_PARM_DESC(medium_error_count, "count of sectors to return follow on MEDIUM error");
6682MODULE_PARM_DESC(medium_error_start, "starting sector number to return MEDIUM error");
6683MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
6684MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
6685MODULE_PARM_DESC(no_rwlock, "don't protect user data reads+writes (def=0)");
6686MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
6687MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
6688MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
6689MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)");
6690MODULE_PARM_DESC(opt_xferlen_exp, "optimal transfer length granularity exponent (def=physblk_exp)");
6691MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
6692MODULE_PARM_DESC(per_host_store, "If set, next positive add_host will get new store (def=0)");
6693MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
6694MODULE_PARM_DESC(poll_queues, "support for iouring iopoll queues (1 to max(submit_queues - 1))");
6695MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
6696MODULE_PARM_DESC(random, "If set, uniformly randomize command duration between 0 and delay_in_ns");
6697MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
6698MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=7[SPC-5])");
6699MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
6700MODULE_PARM_DESC(statistics, "collect statistics on commands, queues (def=0)");
6701MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)");
6702MODULE_PARM_DESC(submit_queues, "support for block multi-queue (def=1)");
6703MODULE_PARM_DESC(tur_ms_to_ready, "TEST UNIT READY millisecs before initial good status (def=0)");
6704MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
6705MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
6706MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
6707MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
6708MODULE_PARM_DESC(atomic_wr_max_length, "max # of blocks can be atomically written in one cmd (def=8192)");
6709MODULE_PARM_DESC(atomic_wr_align, "minimum alignment of atomic write in blocks (def=2)");
6710MODULE_PARM_DESC(atomic_wr_gran, "minimum granularity of atomic write in blocks (def=2)");
6711MODULE_PARM_DESC(atomic_wr_max_length_bndry, "max # of blocks can be atomically written in one cmd with boundary set (def=8192)");
6712MODULE_PARM_DESC(atomic_wr_max_bndry, "max # boundaries per atomic write (def=128)");
6713MODULE_PARM_DESC(uuid_ctl,
6714 "1->use uuid for lu name, 0->don't, 2->all use same (def=0)");
6715MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)");
6716MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
6717MODULE_PARM_DESC(wp, "Write Protect (def=0)");
6718MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
6719MODULE_PARM_DESC(zbc, "'none' [0]; 'aware' [1]; 'managed' [2] (def=0). Can have 'host-' prefix");
6720MODULE_PARM_DESC(zone_cap_mb, "Zone capacity in MiB (def=zone size)");
6721MODULE_PARM_DESC(zone_max_open, "Maximum number of open zones; [0] for no limit (def=auto)");
6722MODULE_PARM_DESC(zone_nr_conv, "Number of conventional zones (def=1)");
6723MODULE_PARM_DESC(zone_size_mb, "Zone size in MiB (def=auto)");
6724MODULE_PARM_DESC(allow_restart, "Set scsi_device's allow_restart flag(def=0)");
6725
6726#define SDEBUG_INFO_LEN 256
6727static char sdebug_info[SDEBUG_INFO_LEN];
6728
6729static const char *scsi_debug_info(struct Scsi_Host *shp)
6730{
6731 int k;
6732
6733 k = scnprintf(sdebug_info, SDEBUG_INFO_LEN, "%s: version %s [%s]\n",
6734 my_name, SDEBUG_VERSION, sdebug_version_date);
6735 if (k >= (SDEBUG_INFO_LEN - 1))
6736 return sdebug_info;
6737 scnprintf(sdebug_info + k, SDEBUG_INFO_LEN - k,
6738 " dev_size_mb=%d, opts=0x%x, submit_queues=%d, %s=%d",
6739 sdebug_dev_size_mb, sdebug_opts, submit_queues,
6740 "statistics", (int)sdebug_statistics);
6741 return sdebug_info;
6742}
6743
6744/* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */
6745static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer,
6746 int length)
6747{
6748 char arr[16];
6749 int opts;
6750 int minLen = length > 15 ? 15 : length;
6751
6752 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
6753 return -EACCES;
6754 memcpy(arr, buffer, minLen);
6755 arr[minLen] = '\0';
6756 if (1 != sscanf(arr, "%d", &opts))
6757 return -EINVAL;
6758 sdebug_opts = opts;
6759 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
6760 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
6761 if (sdebug_every_nth != 0)
6762 tweak_cmnd_count();
6763 return length;
6764}
6765
6766struct sdebug_submit_queue_data {
6767 int *first;
6768 int *last;
6769 int queue_num;
6770};
6771
6772static bool sdebug_submit_queue_iter(struct request *rq, void *opaque)
6773{
6774 struct sdebug_submit_queue_data *data = opaque;
6775 u32 unique_tag = blk_mq_unique_tag(rq);
6776 u16 hwq = blk_mq_unique_tag_to_hwq(unique_tag);
6777 u16 tag = blk_mq_unique_tag_to_tag(unique_tag);
6778 int queue_num = data->queue_num;
6779
6780 if (hwq != queue_num)
6781 return true;
6782
6783 /* Rely on iter'ing in ascending tag order */
6784 if (*data->first == -1)
6785 *data->first = *data->last = tag;
6786 else
6787 *data->last = tag;
6788
6789 return true;
6790}
6791
6792/* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the
6793 * same for each scsi_debug host (if more than one). Some of the counters
6794 * output are not atomics so might be inaccurate in a busy system. */
6795static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
6796{
6797 struct sdebug_host_info *sdhp;
6798 int j;
6799
6800 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n",
6801 SDEBUG_VERSION, sdebug_version_date);
6802 seq_printf(m, "num_tgts=%d, %ssize=%d MB, opts=0x%x, every_nth=%d\n",
6803 sdebug_num_tgts, "shared (ram) ", sdebug_dev_size_mb,
6804 sdebug_opts, sdebug_every_nth);
6805 seq_printf(m, "delay=%d, ndelay=%d, max_luns=%d, sector_size=%d %s\n",
6806 sdebug_jdelay, sdebug_ndelay, sdebug_max_luns,
6807 sdebug_sector_size, "bytes");
6808 seq_printf(m, "cylinders=%d, heads=%d, sectors=%d, command aborts=%d\n",
6809 sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per,
6810 num_aborts);
6811 seq_printf(m, "RESETs: device=%d, target=%d, bus=%d, host=%d\n",
6812 num_dev_resets, num_target_resets, num_bus_resets,
6813 num_host_resets);
6814 seq_printf(m, "dix_reads=%d, dix_writes=%d, dif_errors=%d\n",
6815 dix_reads, dix_writes, dif_errors);
6816 seq_printf(m, "usec_in_jiffy=%lu, statistics=%d\n", TICK_NSEC / 1000,
6817 sdebug_statistics);
6818 seq_printf(m, "cmnd_count=%d, completions=%d, %s=%d, a_tsf=%d, mq_polls=%d\n",
6819 atomic_read(&sdebug_cmnd_count),
6820 atomic_read(&sdebug_completions),
6821 "miss_cpus", atomic_read(&sdebug_miss_cpus),
6822 atomic_read(&sdebug_a_tsf),
6823 atomic_read(&sdeb_mq_poll_count));
6824
6825 seq_printf(m, "submit_queues=%d\n", submit_queues);
6826 for (j = 0; j < submit_queues; ++j) {
6827 int f = -1, l = -1;
6828 struct sdebug_submit_queue_data data = {
6829 .queue_num = j,
6830 .first = &f,
6831 .last = &l,
6832 };
6833 seq_printf(m, " queue %d:\n", j);
6834 blk_mq_tagset_busy_iter(&host->tag_set, sdebug_submit_queue_iter,
6835 &data);
6836 if (f >= 0) {
6837 seq_printf(m, " in_use_bm BUSY: %s: %d,%d\n",
6838 "first,last bits", f, l);
6839 }
6840 }
6841
6842 seq_printf(m, "this host_no=%d\n", host->host_no);
6843 if (!xa_empty(per_store_ap)) {
6844 bool niu;
6845 int idx;
6846 unsigned long l_idx;
6847 struct sdeb_store_info *sip;
6848
6849 seq_puts(m, "\nhost list:\n");
6850 j = 0;
6851 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
6852 idx = sdhp->si_idx;
6853 seq_printf(m, " %d: host_no=%d, si_idx=%d\n", j,
6854 sdhp->shost->host_no, idx);
6855 ++j;
6856 }
6857 seq_printf(m, "\nper_store array [most_recent_idx=%d]:\n",
6858 sdeb_most_recent_idx);
6859 j = 0;
6860 xa_for_each(per_store_ap, l_idx, sip) {
6861 niu = xa_get_mark(per_store_ap, l_idx,
6862 SDEB_XA_NOT_IN_USE);
6863 idx = (int)l_idx;
6864 seq_printf(m, " %d: idx=%d%s\n", j, idx,
6865 (niu ? " not_in_use" : ""));
6866 ++j;
6867 }
6868 }
6869 return 0;
6870}
6871
6872static ssize_t delay_show(struct device_driver *ddp, char *buf)
6873{
6874 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_jdelay);
6875}
6876/* Returns -EBUSY if jdelay is being changed and commands are queued. The unit
6877 * of delay is jiffies.
6878 */
6879static ssize_t delay_store(struct device_driver *ddp, const char *buf,
6880 size_t count)
6881{
6882 int jdelay, res;
6883
6884 if (count > 0 && sscanf(buf, "%d", &jdelay) == 1) {
6885 res = count;
6886 if (sdebug_jdelay != jdelay) {
6887 struct sdebug_host_info *sdhp;
6888
6889 mutex_lock(&sdebug_host_list_mutex);
6890 block_unblock_all_queues(true);
6891
6892 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
6893 struct Scsi_Host *shost = sdhp->shost;
6894
6895 if (scsi_host_busy(shost)) {
6896 res = -EBUSY; /* queued commands */
6897 break;
6898 }
6899 }
6900 if (res > 0) {
6901 sdebug_jdelay = jdelay;
6902 sdebug_ndelay = 0;
6903 }
6904 block_unblock_all_queues(false);
6905 mutex_unlock(&sdebug_host_list_mutex);
6906 }
6907 return res;
6908 }
6909 return -EINVAL;
6910}
6911static DRIVER_ATTR_RW(delay);
6912
6913static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
6914{
6915 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ndelay);
6916}
6917/* Returns -EBUSY if ndelay is being changed and commands are queued */
6918/* If > 0 and accepted then sdebug_jdelay is set to JDELAY_OVERRIDDEN */
6919static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
6920 size_t count)
6921{
6922 int ndelay, res;
6923
6924 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
6925 (ndelay >= 0) && (ndelay < (1000 * 1000 * 1000))) {
6926 res = count;
6927 if (sdebug_ndelay != ndelay) {
6928 struct sdebug_host_info *sdhp;
6929
6930 mutex_lock(&sdebug_host_list_mutex);
6931 block_unblock_all_queues(true);
6932
6933 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
6934 struct Scsi_Host *shost = sdhp->shost;
6935
6936 if (scsi_host_busy(shost)) {
6937 res = -EBUSY; /* queued commands */
6938 break;
6939 }
6940 }
6941
6942 if (res > 0) {
6943 sdebug_ndelay = ndelay;
6944 sdebug_jdelay = ndelay ? JDELAY_OVERRIDDEN
6945 : DEF_JDELAY;
6946 }
6947 block_unblock_all_queues(false);
6948 mutex_unlock(&sdebug_host_list_mutex);
6949 }
6950 return res;
6951 }
6952 return -EINVAL;
6953}
6954static DRIVER_ATTR_RW(ndelay);
6955
6956static ssize_t opts_show(struct device_driver *ddp, char *buf)
6957{
6958 return scnprintf(buf, PAGE_SIZE, "0x%x\n", sdebug_opts);
6959}
6960
6961static ssize_t opts_store(struct device_driver *ddp, const char *buf,
6962 size_t count)
6963{
6964 int opts;
6965 char work[20];
6966
6967 if (sscanf(buf, "%10s", work) == 1) {
6968 if (strncasecmp(work, "0x", 2) == 0) {
6969 if (kstrtoint(work + 2, 16, &opts) == 0)
6970 goto opts_done;
6971 } else {
6972 if (kstrtoint(work, 10, &opts) == 0)
6973 goto opts_done;
6974 }
6975 }
6976 return -EINVAL;
6977opts_done:
6978 sdebug_opts = opts;
6979 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
6980 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
6981 tweak_cmnd_count();
6982 return count;
6983}
6984static DRIVER_ATTR_RW(opts);
6985
6986static ssize_t ptype_show(struct device_driver *ddp, char *buf)
6987{
6988 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ptype);
6989}
6990static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
6991 size_t count)
6992{
6993 int n;
6994
6995 /* Cannot change from or to TYPE_ZBC with sysfs */
6996 if (sdebug_ptype == TYPE_ZBC)
6997 return -EINVAL;
6998
6999 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7000 if (n == TYPE_ZBC)
7001 return -EINVAL;
7002 sdebug_ptype = n;
7003 return count;
7004 }
7005 return -EINVAL;
7006}
7007static DRIVER_ATTR_RW(ptype);
7008
7009static ssize_t dsense_show(struct device_driver *ddp, char *buf)
7010{
7011 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dsense);
7012}
7013static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
7014 size_t count)
7015{
7016 int n;
7017
7018 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7019 sdebug_dsense = n;
7020 return count;
7021 }
7022 return -EINVAL;
7023}
7024static DRIVER_ATTR_RW(dsense);
7025
7026static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
7027{
7028 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_fake_rw);
7029}
7030static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
7031 size_t count)
7032{
7033 int n, idx;
7034
7035 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7036 bool want_store = (n == 0);
7037 struct sdebug_host_info *sdhp;
7038
7039 n = (n > 0);
7040 sdebug_fake_rw = (sdebug_fake_rw > 0);
7041 if (sdebug_fake_rw == n)
7042 return count; /* not transitioning so do nothing */
7043
7044 if (want_store) { /* 1 --> 0 transition, set up store */
7045 if (sdeb_first_idx < 0) {
7046 idx = sdebug_add_store();
7047 if (idx < 0)
7048 return idx;
7049 } else {
7050 idx = sdeb_first_idx;
7051 xa_clear_mark(per_store_ap, idx,
7052 SDEB_XA_NOT_IN_USE);
7053 }
7054 /* make all hosts use same store */
7055 list_for_each_entry(sdhp, &sdebug_host_list,
7056 host_list) {
7057 if (sdhp->si_idx != idx) {
7058 xa_set_mark(per_store_ap, sdhp->si_idx,
7059 SDEB_XA_NOT_IN_USE);
7060 sdhp->si_idx = idx;
7061 }
7062 }
7063 sdeb_most_recent_idx = idx;
7064 } else { /* 0 --> 1 transition is trigger for shrink */
7065 sdebug_erase_all_stores(true /* apart from first */);
7066 }
7067 sdebug_fake_rw = n;
7068 return count;
7069 }
7070 return -EINVAL;
7071}
7072static DRIVER_ATTR_RW(fake_rw);
7073
7074static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
7075{
7076 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_lun_0);
7077}
7078static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
7079 size_t count)
7080{
7081 int n;
7082
7083 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7084 sdebug_no_lun_0 = n;
7085 return count;
7086 }
7087 return -EINVAL;
7088}
7089static DRIVER_ATTR_RW(no_lun_0);
7090
7091static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
7092{
7093 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_tgts);
7094}
7095static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
7096 size_t count)
7097{
7098 int n;
7099
7100 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7101 sdebug_num_tgts = n;
7102 sdebug_max_tgts_luns();
7103 return count;
7104 }
7105 return -EINVAL;
7106}
7107static DRIVER_ATTR_RW(num_tgts);
7108
7109static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
7110{
7111 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dev_size_mb);
7112}
7113static DRIVER_ATTR_RO(dev_size_mb);
7114
7115static ssize_t per_host_store_show(struct device_driver *ddp, char *buf)
7116{
7117 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_per_host_store);
7118}
7119
7120static ssize_t per_host_store_store(struct device_driver *ddp, const char *buf,
7121 size_t count)
7122{
7123 bool v;
7124
7125 if (kstrtobool(buf, &v))
7126 return -EINVAL;
7127
7128 sdebug_per_host_store = v;
7129 return count;
7130}
7131static DRIVER_ATTR_RW(per_host_store);
7132
7133static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
7134{
7135 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_parts);
7136}
7137static DRIVER_ATTR_RO(num_parts);
7138
7139static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
7140{
7141 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_every_nth);
7142}
7143static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
7144 size_t count)
7145{
7146 int nth;
7147 char work[20];
7148
7149 if (sscanf(buf, "%10s", work) == 1) {
7150 if (strncasecmp(work, "0x", 2) == 0) {
7151 if (kstrtoint(work + 2, 16, &nth) == 0)
7152 goto every_nth_done;
7153 } else {
7154 if (kstrtoint(work, 10, &nth) == 0)
7155 goto every_nth_done;
7156 }
7157 }
7158 return -EINVAL;
7159
7160every_nth_done:
7161 sdebug_every_nth = nth;
7162 if (nth && !sdebug_statistics) {
7163 pr_info("every_nth needs statistics=1, set it\n");
7164 sdebug_statistics = true;
7165 }
7166 tweak_cmnd_count();
7167 return count;
7168}
7169static DRIVER_ATTR_RW(every_nth);
7170
7171static ssize_t lun_format_show(struct device_driver *ddp, char *buf)
7172{
7173 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_lun_am);
7174}
7175static ssize_t lun_format_store(struct device_driver *ddp, const char *buf,
7176 size_t count)
7177{
7178 int n;
7179 bool changed;
7180
7181 if (kstrtoint(buf, 0, &n))
7182 return -EINVAL;
7183 if (n >= 0) {
7184 if (n > (int)SAM_LUN_AM_FLAT) {
7185 pr_warn("only LUN address methods 0 and 1 are supported\n");
7186 return -EINVAL;
7187 }
7188 changed = ((int)sdebug_lun_am != n);
7189 sdebug_lun_am = n;
7190 if (changed && sdebug_scsi_level >= 5) { /* >= SPC-3 */
7191 struct sdebug_host_info *sdhp;
7192 struct sdebug_dev_info *dp;
7193
7194 mutex_lock(&sdebug_host_list_mutex);
7195 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
7196 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
7197 set_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
7198 }
7199 }
7200 mutex_unlock(&sdebug_host_list_mutex);
7201 }
7202 return count;
7203 }
7204 return -EINVAL;
7205}
7206static DRIVER_ATTR_RW(lun_format);
7207
7208static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
7209{
7210 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_luns);
7211}
7212static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
7213 size_t count)
7214{
7215 int n;
7216 bool changed;
7217
7218 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7219 if (n > 256) {
7220 pr_warn("max_luns can be no more than 256\n");
7221 return -EINVAL;
7222 }
7223 changed = (sdebug_max_luns != n);
7224 sdebug_max_luns = n;
7225 sdebug_max_tgts_luns();
7226 if (changed && (sdebug_scsi_level >= 5)) { /* >= SPC-3 */
7227 struct sdebug_host_info *sdhp;
7228 struct sdebug_dev_info *dp;
7229
7230 mutex_lock(&sdebug_host_list_mutex);
7231 list_for_each_entry(sdhp, &sdebug_host_list,
7232 host_list) {
7233 list_for_each_entry(dp, &sdhp->dev_info_list,
7234 dev_list) {
7235 set_bit(SDEBUG_UA_LUNS_CHANGED,
7236 dp->uas_bm);
7237 }
7238 }
7239 mutex_unlock(&sdebug_host_list_mutex);
7240 }
7241 return count;
7242 }
7243 return -EINVAL;
7244}
7245static DRIVER_ATTR_RW(max_luns);
7246
7247static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
7248{
7249 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_queue);
7250}
7251/* N.B. max_queue can be changed while there are queued commands. In flight
7252 * commands beyond the new max_queue will be completed. */
7253static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
7254 size_t count)
7255{
7256 int n;
7257
7258 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
7259 (n <= SDEBUG_CANQUEUE) &&
7260 (sdebug_host_max_queue == 0)) {
7261 mutex_lock(&sdebug_host_list_mutex);
7262
7263 /* We may only change sdebug_max_queue when we have no shosts */
7264 if (list_empty(&sdebug_host_list))
7265 sdebug_max_queue = n;
7266 else
7267 count = -EBUSY;
7268 mutex_unlock(&sdebug_host_list_mutex);
7269 return count;
7270 }
7271 return -EINVAL;
7272}
7273static DRIVER_ATTR_RW(max_queue);
7274
7275static ssize_t host_max_queue_show(struct device_driver *ddp, char *buf)
7276{
7277 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_host_max_queue);
7278}
7279
7280static ssize_t no_rwlock_show(struct device_driver *ddp, char *buf)
7281{
7282 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_rwlock);
7283}
7284
7285static ssize_t no_rwlock_store(struct device_driver *ddp, const char *buf, size_t count)
7286{
7287 bool v;
7288
7289 if (kstrtobool(buf, &v))
7290 return -EINVAL;
7291
7292 sdebug_no_rwlock = v;
7293 return count;
7294}
7295static DRIVER_ATTR_RW(no_rwlock);
7296
7297/*
7298 * Since this is used for .can_queue, and we get the hc_idx tag from the bitmap
7299 * in range [0, sdebug_host_max_queue), we can't change it.
7300 */
7301static DRIVER_ATTR_RO(host_max_queue);
7302
7303static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
7304{
7305 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_uld);
7306}
7307static DRIVER_ATTR_RO(no_uld);
7308
7309static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
7310{
7311 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_scsi_level);
7312}
7313static DRIVER_ATTR_RO(scsi_level);
7314
7315static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
7316{
7317 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_virtual_gb);
7318}
7319static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
7320 size_t count)
7321{
7322 int n;
7323 bool changed;
7324
7325 /* Ignore capacity change for ZBC drives for now */
7326 if (sdeb_zbc_in_use)
7327 return -ENOTSUPP;
7328
7329 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7330 changed = (sdebug_virtual_gb != n);
7331 sdebug_virtual_gb = n;
7332 sdebug_capacity = get_sdebug_capacity();
7333 if (changed) {
7334 struct sdebug_host_info *sdhp;
7335 struct sdebug_dev_info *dp;
7336
7337 mutex_lock(&sdebug_host_list_mutex);
7338 list_for_each_entry(sdhp, &sdebug_host_list,
7339 host_list) {
7340 list_for_each_entry(dp, &sdhp->dev_info_list,
7341 dev_list) {
7342 set_bit(SDEBUG_UA_CAPACITY_CHANGED,
7343 dp->uas_bm);
7344 }
7345 }
7346 mutex_unlock(&sdebug_host_list_mutex);
7347 }
7348 return count;
7349 }
7350 return -EINVAL;
7351}
7352static DRIVER_ATTR_RW(virtual_gb);
7353
7354static ssize_t add_host_show(struct device_driver *ddp, char *buf)
7355{
7356 /* absolute number of hosts currently active is what is shown */
7357 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_hosts);
7358}
7359
7360static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
7361 size_t count)
7362{
7363 bool found;
7364 unsigned long idx;
7365 struct sdeb_store_info *sip;
7366 bool want_phs = (sdebug_fake_rw == 0) && sdebug_per_host_store;
7367 int delta_hosts;
7368
7369 if (sscanf(buf, "%d", &delta_hosts) != 1)
7370 return -EINVAL;
7371 if (delta_hosts > 0) {
7372 do {
7373 found = false;
7374 if (want_phs) {
7375 xa_for_each_marked(per_store_ap, idx, sip,
7376 SDEB_XA_NOT_IN_USE) {
7377 sdeb_most_recent_idx = (int)idx;
7378 found = true;
7379 break;
7380 }
7381 if (found) /* re-use case */
7382 sdebug_add_host_helper((int)idx);
7383 else
7384 sdebug_do_add_host(true);
7385 } else {
7386 sdebug_do_add_host(false);
7387 }
7388 } while (--delta_hosts);
7389 } else if (delta_hosts < 0) {
7390 do {
7391 sdebug_do_remove_host(false);
7392 } while (++delta_hosts);
7393 }
7394 return count;
7395}
7396static DRIVER_ATTR_RW(add_host);
7397
7398static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
7399{
7400 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_vpd_use_hostno);
7401}
7402static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
7403 size_t count)
7404{
7405 int n;
7406
7407 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7408 sdebug_vpd_use_hostno = n;
7409 return count;
7410 }
7411 return -EINVAL;
7412}
7413static DRIVER_ATTR_RW(vpd_use_hostno);
7414
7415static ssize_t statistics_show(struct device_driver *ddp, char *buf)
7416{
7417 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_statistics);
7418}
7419static ssize_t statistics_store(struct device_driver *ddp, const char *buf,
7420 size_t count)
7421{
7422 int n;
7423
7424 if ((count > 0) && (sscanf(buf, "%d", &n) == 1) && (n >= 0)) {
7425 if (n > 0)
7426 sdebug_statistics = true;
7427 else {
7428 clear_queue_stats();
7429 sdebug_statistics = false;
7430 }
7431 return count;
7432 }
7433 return -EINVAL;
7434}
7435static DRIVER_ATTR_RW(statistics);
7436
7437static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
7438{
7439 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_sector_size);
7440}
7441static DRIVER_ATTR_RO(sector_size);
7442
7443static ssize_t submit_queues_show(struct device_driver *ddp, char *buf)
7444{
7445 return scnprintf(buf, PAGE_SIZE, "%d\n", submit_queues);
7446}
7447static DRIVER_ATTR_RO(submit_queues);
7448
7449static ssize_t dix_show(struct device_driver *ddp, char *buf)
7450{
7451 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dix);
7452}
7453static DRIVER_ATTR_RO(dix);
7454
7455static ssize_t dif_show(struct device_driver *ddp, char *buf)
7456{
7457 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dif);
7458}
7459static DRIVER_ATTR_RO(dif);
7460
7461static ssize_t guard_show(struct device_driver *ddp, char *buf)
7462{
7463 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_guard);
7464}
7465static DRIVER_ATTR_RO(guard);
7466
7467static ssize_t ato_show(struct device_driver *ddp, char *buf)
7468{
7469 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ato);
7470}
7471static DRIVER_ATTR_RO(ato);
7472
7473static ssize_t map_show(struct device_driver *ddp, char *buf)
7474{
7475 ssize_t count = 0;
7476
7477 if (!scsi_debug_lbp())
7478 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
7479 sdebug_store_sectors);
7480
7481 if (sdebug_fake_rw == 0 && !xa_empty(per_store_ap)) {
7482 struct sdeb_store_info *sip = xa_load(per_store_ap, 0);
7483
7484 if (sip)
7485 count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
7486 (int)map_size, sip->map_storep);
7487 }
7488 buf[count++] = '\n';
7489 buf[count] = '\0';
7490
7491 return count;
7492}
7493static DRIVER_ATTR_RO(map);
7494
7495static ssize_t random_show(struct device_driver *ddp, char *buf)
7496{
7497 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_random);
7498}
7499
7500static ssize_t random_store(struct device_driver *ddp, const char *buf,
7501 size_t count)
7502{
7503 bool v;
7504
7505 if (kstrtobool(buf, &v))
7506 return -EINVAL;
7507
7508 sdebug_random = v;
7509 return count;
7510}
7511static DRIVER_ATTR_RW(random);
7512
7513static ssize_t removable_show(struct device_driver *ddp, char *buf)
7514{
7515 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_removable ? 1 : 0);
7516}
7517static ssize_t removable_store(struct device_driver *ddp, const char *buf,
7518 size_t count)
7519{
7520 int n;
7521
7522 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7523 sdebug_removable = (n > 0);
7524 return count;
7525 }
7526 return -EINVAL;
7527}
7528static DRIVER_ATTR_RW(removable);
7529
7530static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
7531{
7532 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_host_lock);
7533}
7534/* N.B. sdebug_host_lock does nothing, kept for backward compatibility */
7535static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
7536 size_t count)
7537{
7538 int n;
7539
7540 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7541 sdebug_host_lock = (n > 0);
7542 return count;
7543 }
7544 return -EINVAL;
7545}
7546static DRIVER_ATTR_RW(host_lock);
7547
7548static ssize_t strict_show(struct device_driver *ddp, char *buf)
7549{
7550 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_strict);
7551}
7552static ssize_t strict_store(struct device_driver *ddp, const char *buf,
7553 size_t count)
7554{
7555 int n;
7556
7557 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7558 sdebug_strict = (n > 0);
7559 return count;
7560 }
7561 return -EINVAL;
7562}
7563static DRIVER_ATTR_RW(strict);
7564
7565static ssize_t uuid_ctl_show(struct device_driver *ddp, char *buf)
7566{
7567 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_uuid_ctl);
7568}
7569static DRIVER_ATTR_RO(uuid_ctl);
7570
7571static ssize_t cdb_len_show(struct device_driver *ddp, char *buf)
7572{
7573 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_cdb_len);
7574}
7575static ssize_t cdb_len_store(struct device_driver *ddp, const char *buf,
7576 size_t count)
7577{
7578 int ret, n;
7579
7580 ret = kstrtoint(buf, 0, &n);
7581 if (ret)
7582 return ret;
7583 sdebug_cdb_len = n;
7584 all_config_cdb_len();
7585 return count;
7586}
7587static DRIVER_ATTR_RW(cdb_len);
7588
7589static const char * const zbc_model_strs_a[] = {
7590 [BLK_ZONED_NONE] = "none",
7591 [BLK_ZONED_HA] = "host-aware",
7592 [BLK_ZONED_HM] = "host-managed",
7593};
7594
7595static const char * const zbc_model_strs_b[] = {
7596 [BLK_ZONED_NONE] = "no",
7597 [BLK_ZONED_HA] = "aware",
7598 [BLK_ZONED_HM] = "managed",
7599};
7600
7601static const char * const zbc_model_strs_c[] = {
7602 [BLK_ZONED_NONE] = "0",
7603 [BLK_ZONED_HA] = "1",
7604 [BLK_ZONED_HM] = "2",
7605};
7606
7607static int sdeb_zbc_model_str(const char *cp)
7608{
7609 int res = sysfs_match_string(zbc_model_strs_a, cp);
7610
7611 if (res < 0) {
7612 res = sysfs_match_string(zbc_model_strs_b, cp);
7613 if (res < 0) {
7614 res = sysfs_match_string(zbc_model_strs_c, cp);
7615 if (res < 0)
7616 return -EINVAL;
7617 }
7618 }
7619 return res;
7620}
7621
7622static ssize_t zbc_show(struct device_driver *ddp, char *buf)
7623{
7624 return scnprintf(buf, PAGE_SIZE, "%s\n",
7625 zbc_model_strs_a[sdeb_zbc_model]);
7626}
7627static DRIVER_ATTR_RO(zbc);
7628
7629static ssize_t tur_ms_to_ready_show(struct device_driver *ddp, char *buf)
7630{
7631 return scnprintf(buf, PAGE_SIZE, "%d\n", sdeb_tur_ms_to_ready);
7632}
7633static DRIVER_ATTR_RO(tur_ms_to_ready);
7634
7635static ssize_t group_number_stats_show(struct device_driver *ddp, char *buf)
7636{
7637 char *p = buf, *end = buf + PAGE_SIZE;
7638 int i;
7639
7640 for (i = 0; i < ARRAY_SIZE(writes_by_group_number); i++)
7641 p += scnprintf(p, end - p, "%d %ld\n", i,
7642 atomic_long_read(&writes_by_group_number[i]));
7643
7644 return p - buf;
7645}
7646
7647static ssize_t group_number_stats_store(struct device_driver *ddp,
7648 const char *buf, size_t count)
7649{
7650 int i;
7651
7652 for (i = 0; i < ARRAY_SIZE(writes_by_group_number); i++)
7653 atomic_long_set(&writes_by_group_number[i], 0);
7654
7655 return count;
7656}
7657static DRIVER_ATTR_RW(group_number_stats);
7658
7659/* Note: The following array creates attribute files in the
7660 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
7661 files (over those found in the /sys/module/scsi_debug/parameters
7662 directory) is that auxiliary actions can be triggered when an attribute
7663 is changed. For example see: add_host_store() above.
7664 */
7665
7666static struct attribute *sdebug_drv_attrs[] = {
7667 &driver_attr_delay.attr,
7668 &driver_attr_opts.attr,
7669 &driver_attr_ptype.attr,
7670 &driver_attr_dsense.attr,
7671 &driver_attr_fake_rw.attr,
7672 &driver_attr_host_max_queue.attr,
7673 &driver_attr_no_lun_0.attr,
7674 &driver_attr_num_tgts.attr,
7675 &driver_attr_dev_size_mb.attr,
7676 &driver_attr_num_parts.attr,
7677 &driver_attr_every_nth.attr,
7678 &driver_attr_lun_format.attr,
7679 &driver_attr_max_luns.attr,
7680 &driver_attr_max_queue.attr,
7681 &driver_attr_no_rwlock.attr,
7682 &driver_attr_no_uld.attr,
7683 &driver_attr_scsi_level.attr,
7684 &driver_attr_virtual_gb.attr,
7685 &driver_attr_add_host.attr,
7686 &driver_attr_per_host_store.attr,
7687 &driver_attr_vpd_use_hostno.attr,
7688 &driver_attr_sector_size.attr,
7689 &driver_attr_statistics.attr,
7690 &driver_attr_submit_queues.attr,
7691 &driver_attr_dix.attr,
7692 &driver_attr_dif.attr,
7693 &driver_attr_guard.attr,
7694 &driver_attr_ato.attr,
7695 &driver_attr_map.attr,
7696 &driver_attr_random.attr,
7697 &driver_attr_removable.attr,
7698 &driver_attr_host_lock.attr,
7699 &driver_attr_ndelay.attr,
7700 &driver_attr_strict.attr,
7701 &driver_attr_uuid_ctl.attr,
7702 &driver_attr_cdb_len.attr,
7703 &driver_attr_tur_ms_to_ready.attr,
7704 &driver_attr_zbc.attr,
7705 &driver_attr_group_number_stats.attr,
7706 NULL,
7707};
7708ATTRIBUTE_GROUPS(sdebug_drv);
7709
7710static struct device *pseudo_primary;
7711
7712static int __init scsi_debug_init(void)
7713{
7714 bool want_store = (sdebug_fake_rw == 0);
7715 unsigned long sz;
7716 int k, ret, hosts_to_add;
7717 int idx = -1;
7718
7719 if (sdebug_ndelay >= 1000 * 1000 * 1000) {
7720 pr_warn("ndelay must be less than 1 second, ignored\n");
7721 sdebug_ndelay = 0;
7722 } else if (sdebug_ndelay > 0)
7723 sdebug_jdelay = JDELAY_OVERRIDDEN;
7724
7725 switch (sdebug_sector_size) {
7726 case 512:
7727 case 1024:
7728 case 2048:
7729 case 4096:
7730 break;
7731 default:
7732 pr_err("invalid sector_size %d\n", sdebug_sector_size);
7733 return -EINVAL;
7734 }
7735
7736 switch (sdebug_dif) {
7737 case T10_PI_TYPE0_PROTECTION:
7738 break;
7739 case T10_PI_TYPE1_PROTECTION:
7740 case T10_PI_TYPE2_PROTECTION:
7741 case T10_PI_TYPE3_PROTECTION:
7742 have_dif_prot = true;
7743 break;
7744
7745 default:
7746 pr_err("dif must be 0, 1, 2 or 3\n");
7747 return -EINVAL;
7748 }
7749
7750 if (sdebug_num_tgts < 0) {
7751 pr_err("num_tgts must be >= 0\n");
7752 return -EINVAL;
7753 }
7754
7755 if (sdebug_guard > 1) {
7756 pr_err("guard must be 0 or 1\n");
7757 return -EINVAL;
7758 }
7759
7760 if (sdebug_ato > 1) {
7761 pr_err("ato must be 0 or 1\n");
7762 return -EINVAL;
7763 }
7764
7765 if (sdebug_physblk_exp > 15) {
7766 pr_err("invalid physblk_exp %u\n", sdebug_physblk_exp);
7767 return -EINVAL;
7768 }
7769
7770 sdebug_lun_am = sdebug_lun_am_i;
7771 if (sdebug_lun_am > SAM_LUN_AM_FLAT) {
7772 pr_warn("Invalid LUN format %u, using default\n", (int)sdebug_lun_am);
7773 sdebug_lun_am = SAM_LUN_AM_PERIPHERAL;
7774 }
7775
7776 if (sdebug_max_luns > 256) {
7777 if (sdebug_max_luns > 16384) {
7778 pr_warn("max_luns can be no more than 16384, use default\n");
7779 sdebug_max_luns = DEF_MAX_LUNS;
7780 }
7781 sdebug_lun_am = SAM_LUN_AM_FLAT;
7782 }
7783
7784 if (sdebug_lowest_aligned > 0x3fff) {
7785 pr_err("lowest_aligned too big: %u\n", sdebug_lowest_aligned);
7786 return -EINVAL;
7787 }
7788
7789 if (submit_queues < 1) {
7790 pr_err("submit_queues must be 1 or more\n");
7791 return -EINVAL;
7792 }
7793
7794 if ((sdebug_max_queue > SDEBUG_CANQUEUE) || (sdebug_max_queue < 1)) {
7795 pr_err("max_queue must be in range [1, %d]\n", SDEBUG_CANQUEUE);
7796 return -EINVAL;
7797 }
7798
7799 if ((sdebug_host_max_queue > SDEBUG_CANQUEUE) ||
7800 (sdebug_host_max_queue < 0)) {
7801 pr_err("host_max_queue must be in range [0 %d]\n",
7802 SDEBUG_CANQUEUE);
7803 return -EINVAL;
7804 }
7805
7806 if (sdebug_host_max_queue &&
7807 (sdebug_max_queue != sdebug_host_max_queue)) {
7808 sdebug_max_queue = sdebug_host_max_queue;
7809 pr_warn("fixing max submit queue depth to host max queue depth, %d\n",
7810 sdebug_max_queue);
7811 }
7812
7813 /*
7814 * check for host managed zoned block device specified with
7815 * ptype=0x14 or zbc=XXX.
7816 */
7817 if (sdebug_ptype == TYPE_ZBC) {
7818 sdeb_zbc_model = BLK_ZONED_HM;
7819 } else if (sdeb_zbc_model_s && *sdeb_zbc_model_s) {
7820 k = sdeb_zbc_model_str(sdeb_zbc_model_s);
7821 if (k < 0)
7822 return k;
7823 sdeb_zbc_model = k;
7824 switch (sdeb_zbc_model) {
7825 case BLK_ZONED_NONE:
7826 case BLK_ZONED_HA:
7827 sdebug_ptype = TYPE_DISK;
7828 break;
7829 case BLK_ZONED_HM:
7830 sdebug_ptype = TYPE_ZBC;
7831 break;
7832 default:
7833 pr_err("Invalid ZBC model\n");
7834 return -EINVAL;
7835 }
7836 }
7837 if (sdeb_zbc_model != BLK_ZONED_NONE) {
7838 sdeb_zbc_in_use = true;
7839 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT)
7840 sdebug_dev_size_mb = DEF_ZBC_DEV_SIZE_MB;
7841 }
7842
7843 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT)
7844 sdebug_dev_size_mb = DEF_DEV_SIZE_MB;
7845 if (sdebug_dev_size_mb < 1)
7846 sdebug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
7847 sz = (unsigned long)sdebug_dev_size_mb * 1048576;
7848 sdebug_store_sectors = sz / sdebug_sector_size;
7849 sdebug_capacity = get_sdebug_capacity();
7850
7851 /* play around with geometry, don't waste too much on track 0 */
7852 sdebug_heads = 8;
7853 sdebug_sectors_per = 32;
7854 if (sdebug_dev_size_mb >= 256)
7855 sdebug_heads = 64;
7856 else if (sdebug_dev_size_mb >= 16)
7857 sdebug_heads = 32;
7858 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
7859 (sdebug_sectors_per * sdebug_heads);
7860 if (sdebug_cylinders_per >= 1024) {
7861 /* other LLDs do this; implies >= 1GB ram disk ... */
7862 sdebug_heads = 255;
7863 sdebug_sectors_per = 63;
7864 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
7865 (sdebug_sectors_per * sdebug_heads);
7866 }
7867 if (scsi_debug_lbp()) {
7868 sdebug_unmap_max_blocks =
7869 clamp(sdebug_unmap_max_blocks, 0U, 0xffffffffU);
7870
7871 sdebug_unmap_max_desc =
7872 clamp(sdebug_unmap_max_desc, 0U, 256U);
7873
7874 sdebug_unmap_granularity =
7875 clamp(sdebug_unmap_granularity, 1U, 0xffffffffU);
7876
7877 if (sdebug_unmap_alignment &&
7878 sdebug_unmap_granularity <=
7879 sdebug_unmap_alignment) {
7880 pr_err("ERR: unmap_granularity <= unmap_alignment\n");
7881 return -EINVAL;
7882 }
7883 }
7884
7885 xa_init_flags(per_store_ap, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ);
7886 if (want_store) {
7887 idx = sdebug_add_store();
7888 if (idx < 0)
7889 return idx;
7890 }
7891
7892 pseudo_primary = root_device_register("pseudo_0");
7893 if (IS_ERR(pseudo_primary)) {
7894 pr_warn("root_device_register() error\n");
7895 ret = PTR_ERR(pseudo_primary);
7896 goto free_vm;
7897 }
7898 ret = bus_register(&pseudo_lld_bus);
7899 if (ret < 0) {
7900 pr_warn("bus_register error: %d\n", ret);
7901 goto dev_unreg;
7902 }
7903 ret = driver_register(&sdebug_driverfs_driver);
7904 if (ret < 0) {
7905 pr_warn("driver_register error: %d\n", ret);
7906 goto bus_unreg;
7907 }
7908
7909 hosts_to_add = sdebug_add_host;
7910 sdebug_add_host = 0;
7911
7912 queued_cmd_cache = KMEM_CACHE(sdebug_queued_cmd, SLAB_HWCACHE_ALIGN);
7913 if (!queued_cmd_cache) {
7914 ret = -ENOMEM;
7915 goto driver_unreg;
7916 }
7917
7918 sdebug_debugfs_root = debugfs_create_dir("scsi_debug", NULL);
7919 if (IS_ERR_OR_NULL(sdebug_debugfs_root))
7920 pr_info("%s: failed to create initial debugfs directory\n", __func__);
7921
7922 for (k = 0; k < hosts_to_add; k++) {
7923 if (want_store && k == 0) {
7924 ret = sdebug_add_host_helper(idx);
7925 if (ret < 0) {
7926 pr_err("add_host_helper k=%d, error=%d\n",
7927 k, -ret);
7928 break;
7929 }
7930 } else {
7931 ret = sdebug_do_add_host(want_store &&
7932 sdebug_per_host_store);
7933 if (ret < 0) {
7934 pr_err("add_host k=%d error=%d\n", k, -ret);
7935 break;
7936 }
7937 }
7938 }
7939 if (sdebug_verbose)
7940 pr_info("built %d host(s)\n", sdebug_num_hosts);
7941
7942 return 0;
7943
7944driver_unreg:
7945 driver_unregister(&sdebug_driverfs_driver);
7946bus_unreg:
7947 bus_unregister(&pseudo_lld_bus);
7948dev_unreg:
7949 root_device_unregister(pseudo_primary);
7950free_vm:
7951 sdebug_erase_store(idx, NULL);
7952 return ret;
7953}
7954
7955static void __exit scsi_debug_exit(void)
7956{
7957 int k = sdebug_num_hosts;
7958
7959 for (; k; k--)
7960 sdebug_do_remove_host(true);
7961 kmem_cache_destroy(queued_cmd_cache);
7962 driver_unregister(&sdebug_driverfs_driver);
7963 bus_unregister(&pseudo_lld_bus);
7964 root_device_unregister(pseudo_primary);
7965
7966 sdebug_erase_all_stores(false);
7967 xa_destroy(per_store_ap);
7968 debugfs_remove(sdebug_debugfs_root);
7969}
7970
7971device_initcall(scsi_debug_init);
7972module_exit(scsi_debug_exit);
7973
7974static void sdebug_release_adapter(struct device *dev)
7975{
7976 struct sdebug_host_info *sdbg_host;
7977
7978 sdbg_host = dev_to_sdebug_host(dev);
7979 kfree(sdbg_host);
7980}
7981
7982/* idx must be valid, if sip is NULL then it will be obtained using idx */
7983static void sdebug_erase_store(int idx, struct sdeb_store_info *sip)
7984{
7985 if (idx < 0)
7986 return;
7987 if (!sip) {
7988 if (xa_empty(per_store_ap))
7989 return;
7990 sip = xa_load(per_store_ap, idx);
7991 if (!sip)
7992 return;
7993 }
7994 vfree(sip->map_storep);
7995 vfree(sip->dif_storep);
7996 vfree(sip->storep);
7997 xa_erase(per_store_ap, idx);
7998 kfree(sip);
7999}
8000
8001/* Assume apart_from_first==false only in shutdown case. */
8002static void sdebug_erase_all_stores(bool apart_from_first)
8003{
8004 unsigned long idx;
8005 struct sdeb_store_info *sip = NULL;
8006
8007 xa_for_each(per_store_ap, idx, sip) {
8008 if (apart_from_first)
8009 apart_from_first = false;
8010 else
8011 sdebug_erase_store(idx, sip);
8012 }
8013 if (apart_from_first)
8014 sdeb_most_recent_idx = sdeb_first_idx;
8015}
8016
8017/*
8018 * Returns store xarray new element index (idx) if >=0 else negated errno.
8019 * Limit the number of stores to 65536.
8020 */
8021static int sdebug_add_store(void)
8022{
8023 int res;
8024 u32 n_idx;
8025 unsigned long iflags;
8026 unsigned long sz = (unsigned long)sdebug_dev_size_mb * 1048576;
8027 struct sdeb_store_info *sip = NULL;
8028 struct xa_limit xal = { .max = 1 << 16, .min = 0 };
8029
8030 sip = kzalloc(sizeof(*sip), GFP_KERNEL);
8031 if (!sip)
8032 return -ENOMEM;
8033
8034 xa_lock_irqsave(per_store_ap, iflags);
8035 res = __xa_alloc(per_store_ap, &n_idx, sip, xal, GFP_ATOMIC);
8036 if (unlikely(res < 0)) {
8037 xa_unlock_irqrestore(per_store_ap, iflags);
8038 kfree(sip);
8039 pr_warn("%s: xa_alloc() errno=%d\n", __func__, -res);
8040 return res;
8041 }
8042 sdeb_most_recent_idx = n_idx;
8043 if (sdeb_first_idx < 0)
8044 sdeb_first_idx = n_idx;
8045 xa_unlock_irqrestore(per_store_ap, iflags);
8046
8047 res = -ENOMEM;
8048 sip->storep = vzalloc(sz);
8049 if (!sip->storep) {
8050 pr_err("user data oom\n");
8051 goto err;
8052 }
8053 if (sdebug_num_parts > 0)
8054 sdebug_build_parts(sip->storep, sz);
8055
8056 /* DIF/DIX: what T10 calls Protection Information (PI) */
8057 if (sdebug_dix) {
8058 int dif_size;
8059
8060 dif_size = sdebug_store_sectors * sizeof(struct t10_pi_tuple);
8061 sip->dif_storep = vmalloc(dif_size);
8062
8063 pr_info("dif_storep %u bytes @ %pK\n", dif_size,
8064 sip->dif_storep);
8065
8066 if (!sip->dif_storep) {
8067 pr_err("DIX oom\n");
8068 goto err;
8069 }
8070 memset(sip->dif_storep, 0xff, dif_size);
8071 }
8072 /* Logical Block Provisioning */
8073 if (scsi_debug_lbp()) {
8074 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
8075 sip->map_storep = vmalloc(array_size(sizeof(long),
8076 BITS_TO_LONGS(map_size)));
8077
8078 pr_info("%lu provisioning blocks\n", map_size);
8079
8080 if (!sip->map_storep) {
8081 pr_err("LBP map oom\n");
8082 goto err;
8083 }
8084
8085 bitmap_zero(sip->map_storep, map_size);
8086
8087 /* Map first 1KB for partition table */
8088 if (sdebug_num_parts)
8089 map_region(sip, 0, 2);
8090 }
8091
8092 rwlock_init(&sip->macc_data_lck);
8093 rwlock_init(&sip->macc_meta_lck);
8094 rwlock_init(&sip->macc_sector_lck);
8095 return (int)n_idx;
8096err:
8097 sdebug_erase_store((int)n_idx, sip);
8098 pr_warn("%s: failed, errno=%d\n", __func__, -res);
8099 return res;
8100}
8101
8102static int sdebug_add_host_helper(int per_host_idx)
8103{
8104 int k, devs_per_host, idx;
8105 int error = -ENOMEM;
8106 struct sdebug_host_info *sdbg_host;
8107 struct sdebug_dev_info *sdbg_devinfo, *tmp;
8108
8109 sdbg_host = kzalloc(sizeof(*sdbg_host), GFP_KERNEL);
8110 if (!sdbg_host)
8111 return -ENOMEM;
8112 idx = (per_host_idx < 0) ? sdeb_first_idx : per_host_idx;
8113 if (xa_get_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE))
8114 xa_clear_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE);
8115 sdbg_host->si_idx = idx;
8116
8117 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
8118
8119 devs_per_host = sdebug_num_tgts * sdebug_max_luns;
8120 for (k = 0; k < devs_per_host; k++) {
8121 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
8122 if (!sdbg_devinfo)
8123 goto clean;
8124 }
8125
8126 mutex_lock(&sdebug_host_list_mutex);
8127 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
8128 mutex_unlock(&sdebug_host_list_mutex);
8129
8130 sdbg_host->dev.bus = &pseudo_lld_bus;
8131 sdbg_host->dev.parent = pseudo_primary;
8132 sdbg_host->dev.release = &sdebug_release_adapter;
8133 dev_set_name(&sdbg_host->dev, "adapter%d", sdebug_num_hosts);
8134
8135 error = device_register(&sdbg_host->dev);
8136 if (error) {
8137 mutex_lock(&sdebug_host_list_mutex);
8138 list_del(&sdbg_host->host_list);
8139 mutex_unlock(&sdebug_host_list_mutex);
8140 goto clean;
8141 }
8142
8143 ++sdebug_num_hosts;
8144 return 0;
8145
8146clean:
8147 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
8148 dev_list) {
8149 list_del(&sdbg_devinfo->dev_list);
8150 kfree(sdbg_devinfo->zstate);
8151 kfree(sdbg_devinfo);
8152 }
8153 if (sdbg_host->dev.release)
8154 put_device(&sdbg_host->dev);
8155 else
8156 kfree(sdbg_host);
8157 pr_warn("%s: failed, errno=%d\n", __func__, -error);
8158 return error;
8159}
8160
8161static int sdebug_do_add_host(bool mk_new_store)
8162{
8163 int ph_idx = sdeb_most_recent_idx;
8164
8165 if (mk_new_store) {
8166 ph_idx = sdebug_add_store();
8167 if (ph_idx < 0)
8168 return ph_idx;
8169 }
8170 return sdebug_add_host_helper(ph_idx);
8171}
8172
8173static void sdebug_do_remove_host(bool the_end)
8174{
8175 int idx = -1;
8176 struct sdebug_host_info *sdbg_host = NULL;
8177 struct sdebug_host_info *sdbg_host2;
8178
8179 mutex_lock(&sdebug_host_list_mutex);
8180 if (!list_empty(&sdebug_host_list)) {
8181 sdbg_host = list_entry(sdebug_host_list.prev,
8182 struct sdebug_host_info, host_list);
8183 idx = sdbg_host->si_idx;
8184 }
8185 if (!the_end && idx >= 0) {
8186 bool unique = true;
8187
8188 list_for_each_entry(sdbg_host2, &sdebug_host_list, host_list) {
8189 if (sdbg_host2 == sdbg_host)
8190 continue;
8191 if (idx == sdbg_host2->si_idx) {
8192 unique = false;
8193 break;
8194 }
8195 }
8196 if (unique) {
8197 xa_set_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE);
8198 if (idx == sdeb_most_recent_idx)
8199 --sdeb_most_recent_idx;
8200 }
8201 }
8202 if (sdbg_host)
8203 list_del(&sdbg_host->host_list);
8204 mutex_unlock(&sdebug_host_list_mutex);
8205
8206 if (!sdbg_host)
8207 return;
8208
8209 device_unregister(&sdbg_host->dev);
8210 --sdebug_num_hosts;
8211}
8212
8213static int sdebug_change_qdepth(struct scsi_device *sdev, int qdepth)
8214{
8215 struct sdebug_dev_info *devip = sdev->hostdata;
8216
8217 if (!devip)
8218 return -ENODEV;
8219
8220 mutex_lock(&sdebug_host_list_mutex);
8221 block_unblock_all_queues(true);
8222
8223 if (qdepth > SDEBUG_CANQUEUE) {
8224 qdepth = SDEBUG_CANQUEUE;
8225 pr_warn("%s: requested qdepth [%d] exceeds canqueue [%d], trim\n", __func__,
8226 qdepth, SDEBUG_CANQUEUE);
8227 }
8228 if (qdepth < 1)
8229 qdepth = 1;
8230 if (qdepth != sdev->queue_depth)
8231 scsi_change_queue_depth(sdev, qdepth);
8232
8233 block_unblock_all_queues(false);
8234 mutex_unlock(&sdebug_host_list_mutex);
8235
8236 if (SDEBUG_OPT_Q_NOISE & sdebug_opts)
8237 sdev_printk(KERN_INFO, sdev, "%s: qdepth=%d\n", __func__, qdepth);
8238
8239 return sdev->queue_depth;
8240}
8241
8242static bool fake_timeout(struct scsi_cmnd *scp)
8243{
8244 if (0 == (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth))) {
8245 if (sdebug_every_nth < -1)
8246 sdebug_every_nth = -1;
8247 if (SDEBUG_OPT_TIMEOUT & sdebug_opts)
8248 return true; /* ignore command causing timeout */
8249 else if (SDEBUG_OPT_MAC_TIMEOUT & sdebug_opts &&
8250 scsi_medium_access_command(scp))
8251 return true; /* time out reads and writes */
8252 }
8253 return false;
8254}
8255
8256/* Response to TUR or media access command when device stopped */
8257static int resp_not_ready(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
8258{
8259 int stopped_state;
8260 u64 diff_ns = 0;
8261 ktime_t now_ts = ktime_get_boottime();
8262 struct scsi_device *sdp = scp->device;
8263
8264 stopped_state = atomic_read(&devip->stopped);
8265 if (stopped_state == 2) {
8266 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) {
8267 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts));
8268 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) {
8269 /* tur_ms_to_ready timer extinguished */
8270 atomic_set(&devip->stopped, 0);
8271 return 0;
8272 }
8273 }
8274 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x1);
8275 if (sdebug_verbose)
8276 sdev_printk(KERN_INFO, sdp,
8277 "%s: Not ready: in process of becoming ready\n", my_name);
8278 if (scp->cmnd[0] == TEST_UNIT_READY) {
8279 u64 tur_nanosecs_to_ready = (u64)sdeb_tur_ms_to_ready * 1000000;
8280
8281 if (diff_ns <= tur_nanosecs_to_ready)
8282 diff_ns = tur_nanosecs_to_ready - diff_ns;
8283 else
8284 diff_ns = tur_nanosecs_to_ready;
8285 /* As per 20-061r2 approved for spc6 by T10 on 20200716 */
8286 do_div(diff_ns, 1000000); /* diff_ns becomes milliseconds */
8287 scsi_set_sense_information(scp->sense_buffer, SCSI_SENSE_BUFFERSIZE,
8288 diff_ns);
8289 return check_condition_result;
8290 }
8291 }
8292 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2);
8293 if (sdebug_verbose)
8294 sdev_printk(KERN_INFO, sdp, "%s: Not ready: initializing command required\n",
8295 my_name);
8296 return check_condition_result;
8297}
8298
8299static void sdebug_map_queues(struct Scsi_Host *shost)
8300{
8301 int i, qoff;
8302
8303 if (shost->nr_hw_queues == 1)
8304 return;
8305
8306 for (i = 0, qoff = 0; i < HCTX_MAX_TYPES; i++) {
8307 struct blk_mq_queue_map *map = &shost->tag_set.map[i];
8308
8309 map->nr_queues = 0;
8310
8311 if (i == HCTX_TYPE_DEFAULT)
8312 map->nr_queues = submit_queues - poll_queues;
8313 else if (i == HCTX_TYPE_POLL)
8314 map->nr_queues = poll_queues;
8315
8316 if (!map->nr_queues) {
8317 BUG_ON(i == HCTX_TYPE_DEFAULT);
8318 continue;
8319 }
8320
8321 map->queue_offset = qoff;
8322 blk_mq_map_queues(map);
8323
8324 qoff += map->nr_queues;
8325 }
8326}
8327
8328struct sdebug_blk_mq_poll_data {
8329 unsigned int queue_num;
8330 int *num_entries;
8331};
8332
8333/*
8334 * We don't handle aborted commands here, but it does not seem possible to have
8335 * aborted polled commands from schedule_resp()
8336 */
8337static bool sdebug_blk_mq_poll_iter(struct request *rq, void *opaque)
8338{
8339 struct sdebug_blk_mq_poll_data *data = opaque;
8340 struct scsi_cmnd *cmd = blk_mq_rq_to_pdu(rq);
8341 struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmd);
8342 struct sdebug_defer *sd_dp;
8343 u32 unique_tag = blk_mq_unique_tag(rq);
8344 u16 hwq = blk_mq_unique_tag_to_hwq(unique_tag);
8345 struct sdebug_queued_cmd *sqcp;
8346 unsigned long flags;
8347 int queue_num = data->queue_num;
8348 ktime_t time;
8349
8350 /* We're only interested in one queue for this iteration */
8351 if (hwq != queue_num)
8352 return true;
8353
8354 /* Subsequent checks would fail if this failed, but check anyway */
8355 if (!test_bit(SCMD_STATE_INFLIGHT, &cmd->state))
8356 return true;
8357
8358 time = ktime_get_boottime();
8359
8360 spin_lock_irqsave(&sdsc->lock, flags);
8361 sqcp = TO_QUEUED_CMD(cmd);
8362 if (!sqcp) {
8363 spin_unlock_irqrestore(&sdsc->lock, flags);
8364 return true;
8365 }
8366
8367 sd_dp = &sqcp->sd_dp;
8368 if (READ_ONCE(sd_dp->defer_t) != SDEB_DEFER_POLL) {
8369 spin_unlock_irqrestore(&sdsc->lock, flags);
8370 return true;
8371 }
8372
8373 if (time < sd_dp->cmpl_ts) {
8374 spin_unlock_irqrestore(&sdsc->lock, flags);
8375 return true;
8376 }
8377
8378 ASSIGN_QUEUED_CMD(cmd, NULL);
8379 spin_unlock_irqrestore(&sdsc->lock, flags);
8380
8381 if (sdebug_statistics) {
8382 atomic_inc(&sdebug_completions);
8383 if (raw_smp_processor_id() != sd_dp->issuing_cpu)
8384 atomic_inc(&sdebug_miss_cpus);
8385 }
8386
8387 sdebug_free_queued_cmd(sqcp);
8388
8389 scsi_done(cmd); /* callback to mid level */
8390 (*data->num_entries)++;
8391 return true;
8392}
8393
8394static int sdebug_blk_mq_poll(struct Scsi_Host *shost, unsigned int queue_num)
8395{
8396 int num_entries = 0;
8397 struct sdebug_blk_mq_poll_data data = {
8398 .queue_num = queue_num,
8399 .num_entries = &num_entries,
8400 };
8401
8402 blk_mq_tagset_busy_iter(&shost->tag_set, sdebug_blk_mq_poll_iter,
8403 &data);
8404
8405 if (num_entries > 0)
8406 atomic_add(num_entries, &sdeb_mq_poll_count);
8407 return num_entries;
8408}
8409
8410static int sdebug_timeout_cmd(struct scsi_cmnd *cmnd)
8411{
8412 struct scsi_device *sdp = cmnd->device;
8413 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
8414 struct sdebug_err_inject *err;
8415 unsigned char *cmd = cmnd->cmnd;
8416 int ret = 0;
8417
8418 if (devip == NULL)
8419 return 0;
8420
8421 rcu_read_lock();
8422 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
8423 if (err->type == ERR_TMOUT_CMD &&
8424 (err->cmd == cmd[0] || err->cmd == 0xff)) {
8425 ret = !!err->cnt;
8426 if (err->cnt < 0)
8427 err->cnt++;
8428
8429 rcu_read_unlock();
8430 return ret;
8431 }
8432 }
8433 rcu_read_unlock();
8434
8435 return 0;
8436}
8437
8438static int sdebug_fail_queue_cmd(struct scsi_cmnd *cmnd)
8439{
8440 struct scsi_device *sdp = cmnd->device;
8441 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
8442 struct sdebug_err_inject *err;
8443 unsigned char *cmd = cmnd->cmnd;
8444 int ret = 0;
8445
8446 if (devip == NULL)
8447 return 0;
8448
8449 rcu_read_lock();
8450 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
8451 if (err->type == ERR_FAIL_QUEUE_CMD &&
8452 (err->cmd == cmd[0] || err->cmd == 0xff)) {
8453 ret = err->cnt ? err->queuecmd_ret : 0;
8454 if (err->cnt < 0)
8455 err->cnt++;
8456
8457 rcu_read_unlock();
8458 return ret;
8459 }
8460 }
8461 rcu_read_unlock();
8462
8463 return 0;
8464}
8465
8466static int sdebug_fail_cmd(struct scsi_cmnd *cmnd, int *retval,
8467 struct sdebug_err_inject *info)
8468{
8469 struct scsi_device *sdp = cmnd->device;
8470 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
8471 struct sdebug_err_inject *err;
8472 unsigned char *cmd = cmnd->cmnd;
8473 int ret = 0;
8474 int result;
8475
8476 if (devip == NULL)
8477 return 0;
8478
8479 rcu_read_lock();
8480 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
8481 if (err->type == ERR_FAIL_CMD &&
8482 (err->cmd == cmd[0] || err->cmd == 0xff)) {
8483 if (!err->cnt) {
8484 rcu_read_unlock();
8485 return 0;
8486 }
8487
8488 ret = !!err->cnt;
8489 rcu_read_unlock();
8490 goto out_handle;
8491 }
8492 }
8493 rcu_read_unlock();
8494
8495 return 0;
8496
8497out_handle:
8498 if (err->cnt < 0)
8499 err->cnt++;
8500 mk_sense_buffer(cmnd, err->sense_key, err->asc, err->asq);
8501 result = err->status_byte | err->host_byte << 16 | err->driver_byte << 24;
8502 *info = *err;
8503 *retval = schedule_resp(cmnd, devip, result, NULL, 0, 0);
8504
8505 return ret;
8506}
8507
8508static int scsi_debug_queuecommand(struct Scsi_Host *shost,
8509 struct scsi_cmnd *scp)
8510{
8511 u8 sdeb_i;
8512 struct scsi_device *sdp = scp->device;
8513 const struct opcode_info_t *oip;
8514 const struct opcode_info_t *r_oip;
8515 struct sdebug_dev_info *devip;
8516 u8 *cmd = scp->cmnd;
8517 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
8518 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *) = NULL;
8519 int k, na;
8520 int errsts = 0;
8521 u64 lun_index = sdp->lun & 0x3FFF;
8522 u32 flags;
8523 u16 sa;
8524 u8 opcode = cmd[0];
8525 bool has_wlun_rl;
8526 bool inject_now;
8527 int ret = 0;
8528 struct sdebug_err_inject err;
8529
8530 scsi_set_resid(scp, 0);
8531 if (sdebug_statistics) {
8532 atomic_inc(&sdebug_cmnd_count);
8533 inject_now = inject_on_this_cmd();
8534 } else {
8535 inject_now = false;
8536 }
8537 if (unlikely(sdebug_verbose &&
8538 !(SDEBUG_OPT_NO_CDB_NOISE & sdebug_opts))) {
8539 char b[120];
8540 int n, len, sb;
8541
8542 len = scp->cmd_len;
8543 sb = (int)sizeof(b);
8544 if (len > 32)
8545 strcpy(b, "too long, over 32 bytes");
8546 else {
8547 for (k = 0, n = 0; k < len && n < sb; ++k)
8548 n += scnprintf(b + n, sb - n, "%02x ",
8549 (u32)cmd[k]);
8550 }
8551 sdev_printk(KERN_INFO, sdp, "%s: tag=%#x, cmd %s\n", my_name,
8552 blk_mq_unique_tag(scsi_cmd_to_rq(scp)), b);
8553 }
8554 if (unlikely(inject_now && (sdebug_opts & SDEBUG_OPT_HOST_BUSY)))
8555 return SCSI_MLQUEUE_HOST_BUSY;
8556 has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS);
8557 if (unlikely(lun_index >= sdebug_max_luns && !has_wlun_rl))
8558 goto err_out;
8559
8560 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */
8561 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */
8562 devip = (struct sdebug_dev_info *)sdp->hostdata;
8563 if (unlikely(!devip)) {
8564 devip = find_build_dev_info(sdp);
8565 if (NULL == devip)
8566 goto err_out;
8567 }
8568
8569 if (sdebug_timeout_cmd(scp)) {
8570 scmd_printk(KERN_INFO, scp, "timeout command 0x%x\n", opcode);
8571 return 0;
8572 }
8573
8574 ret = sdebug_fail_queue_cmd(scp);
8575 if (ret) {
8576 scmd_printk(KERN_INFO, scp, "fail queue command 0x%x with 0x%x\n",
8577 opcode, ret);
8578 return ret;
8579 }
8580
8581 if (sdebug_fail_cmd(scp, &ret, &err)) {
8582 scmd_printk(KERN_INFO, scp,
8583 "fail command 0x%x with hostbyte=0x%x, "
8584 "driverbyte=0x%x, statusbyte=0x%x, "
8585 "sense_key=0x%x, asc=0x%x, asq=0x%x\n",
8586 opcode, err.host_byte, err.driver_byte,
8587 err.status_byte, err.sense_key, err.asc, err.asq);
8588 return ret;
8589 }
8590
8591 if (unlikely(inject_now && !atomic_read(&sdeb_inject_pending)))
8592 atomic_set(&sdeb_inject_pending, 1);
8593
8594 na = oip->num_attached;
8595 r_pfp = oip->pfp;
8596 if (na) { /* multiple commands with this opcode */
8597 r_oip = oip;
8598 if (FF_SA & r_oip->flags) {
8599 if (F_SA_LOW & oip->flags)
8600 sa = 0x1f & cmd[1];
8601 else
8602 sa = get_unaligned_be16(cmd + 8);
8603 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
8604 if (opcode == oip->opcode && sa == oip->sa)
8605 break;
8606 }
8607 } else { /* since no service action only check opcode */
8608 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
8609 if (opcode == oip->opcode)
8610 break;
8611 }
8612 }
8613 if (k > na) {
8614 if (F_SA_LOW & r_oip->flags)
8615 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4);
8616 else if (F_SA_HIGH & r_oip->flags)
8617 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7);
8618 else
8619 mk_sense_invalid_opcode(scp);
8620 goto check_cond;
8621 }
8622 } /* else (when na==0) we assume the oip is a match */
8623 flags = oip->flags;
8624 if (unlikely(F_INV_OP & flags)) {
8625 mk_sense_invalid_opcode(scp);
8626 goto check_cond;
8627 }
8628 if (unlikely(has_wlun_rl && !(F_RL_WLUN_OK & flags))) {
8629 if (sdebug_verbose)
8630 sdev_printk(KERN_INFO, sdp, "%s: Opcode 0x%x not%s\n",
8631 my_name, opcode, " supported for wlun");
8632 mk_sense_invalid_opcode(scp);
8633 goto check_cond;
8634 }
8635 if (unlikely(sdebug_strict)) { /* check cdb against mask */
8636 u8 rem;
8637 int j;
8638
8639 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) {
8640 rem = ~oip->len_mask[k] & cmd[k];
8641 if (rem) {
8642 for (j = 7; j >= 0; --j, rem <<= 1) {
8643 if (0x80 & rem)
8644 break;
8645 }
8646 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j);
8647 goto check_cond;
8648 }
8649 }
8650 }
8651 if (unlikely(!(F_SKIP_UA & flags) &&
8652 find_first_bit(devip->uas_bm,
8653 SDEBUG_NUM_UAS) != SDEBUG_NUM_UAS)) {
8654 errsts = make_ua(scp, devip);
8655 if (errsts)
8656 goto check_cond;
8657 }
8658 if (unlikely(((F_M_ACCESS & flags) || scp->cmnd[0] == TEST_UNIT_READY) &&
8659 atomic_read(&devip->stopped))) {
8660 errsts = resp_not_ready(scp, devip);
8661 if (errsts)
8662 goto fini;
8663 }
8664 if (sdebug_fake_rw && (F_FAKE_RW & flags))
8665 goto fini;
8666 if (unlikely(sdebug_every_nth)) {
8667 if (fake_timeout(scp))
8668 return 0; /* ignore command: make trouble */
8669 }
8670 if (likely(oip->pfp))
8671 pfp = oip->pfp; /* calls a resp_* function */
8672 else
8673 pfp = r_pfp; /* if leaf function ptr NULL, try the root's */
8674
8675fini:
8676 if (F_DELAY_OVERR & flags) /* cmds like INQUIRY respond asap */
8677 return schedule_resp(scp, devip, errsts, pfp, 0, 0);
8678 else if ((flags & F_LONG_DELAY) && (sdebug_jdelay > 0 ||
8679 sdebug_ndelay > 10000)) {
8680 /*
8681 * Skip long delays if ndelay <= 10 microseconds. Otherwise
8682 * for Start Stop Unit (SSU) want at least 1 second delay and
8683 * if sdebug_jdelay>1 want a long delay of that many seconds.
8684 * For Synchronize Cache want 1/20 of SSU's delay.
8685 */
8686 int jdelay = (sdebug_jdelay < 2) ? 1 : sdebug_jdelay;
8687 int denom = (flags & F_SYNC_DELAY) ? 20 : 1;
8688
8689 jdelay = mult_frac(USER_HZ * jdelay, HZ, denom * USER_HZ);
8690 return schedule_resp(scp, devip, errsts, pfp, jdelay, 0);
8691 } else
8692 return schedule_resp(scp, devip, errsts, pfp, sdebug_jdelay,
8693 sdebug_ndelay);
8694check_cond:
8695 return schedule_resp(scp, devip, check_condition_result, NULL, 0, 0);
8696err_out:
8697 return schedule_resp(scp, NULL, DID_NO_CONNECT << 16, NULL, 0, 0);
8698}
8699
8700static int sdebug_init_cmd_priv(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
8701{
8702 struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmd);
8703
8704 spin_lock_init(&sdsc->lock);
8705
8706 return 0;
8707}
8708
8709static struct scsi_host_template sdebug_driver_template = {
8710 .show_info = scsi_debug_show_info,
8711 .write_info = scsi_debug_write_info,
8712 .proc_name = sdebug_proc_name,
8713 .name = "SCSI DEBUG",
8714 .info = scsi_debug_info,
8715 .slave_alloc = scsi_debug_slave_alloc,
8716 .slave_configure = scsi_debug_slave_configure,
8717 .slave_destroy = scsi_debug_slave_destroy,
8718 .ioctl = scsi_debug_ioctl,
8719 .queuecommand = scsi_debug_queuecommand,
8720 .change_queue_depth = sdebug_change_qdepth,
8721 .map_queues = sdebug_map_queues,
8722 .mq_poll = sdebug_blk_mq_poll,
8723 .eh_abort_handler = scsi_debug_abort,
8724 .eh_device_reset_handler = scsi_debug_device_reset,
8725 .eh_target_reset_handler = scsi_debug_target_reset,
8726 .eh_bus_reset_handler = scsi_debug_bus_reset,
8727 .eh_host_reset_handler = scsi_debug_host_reset,
8728 .can_queue = SDEBUG_CANQUEUE,
8729 .this_id = 7,
8730 .sg_tablesize = SG_MAX_SEGMENTS,
8731 .cmd_per_lun = DEF_CMD_PER_LUN,
8732 .max_sectors = -1U,
8733 .max_segment_size = -1U,
8734 .module = THIS_MODULE,
8735 .track_queue_depth = 1,
8736 .cmd_size = sizeof(struct sdebug_scsi_cmd),
8737 .init_cmd_priv = sdebug_init_cmd_priv,
8738 .target_alloc = sdebug_target_alloc,
8739 .target_destroy = sdebug_target_destroy,
8740};
8741
8742static int sdebug_driver_probe(struct device *dev)
8743{
8744 int error = 0;
8745 struct sdebug_host_info *sdbg_host;
8746 struct Scsi_Host *hpnt;
8747 int hprot;
8748
8749 sdbg_host = dev_to_sdebug_host(dev);
8750
8751 sdebug_driver_template.can_queue = sdebug_max_queue;
8752 sdebug_driver_template.cmd_per_lun = sdebug_max_queue;
8753 if (!sdebug_clustering)
8754 sdebug_driver_template.dma_boundary = PAGE_SIZE - 1;
8755
8756 hpnt = scsi_host_alloc(&sdebug_driver_template, 0);
8757 if (NULL == hpnt) {
8758 pr_err("scsi_host_alloc failed\n");
8759 error = -ENODEV;
8760 return error;
8761 }
8762 if (submit_queues > nr_cpu_ids) {
8763 pr_warn("%s: trim submit_queues (was %d) to nr_cpu_ids=%u\n",
8764 my_name, submit_queues, nr_cpu_ids);
8765 submit_queues = nr_cpu_ids;
8766 }
8767 /*
8768 * Decide whether to tell scsi subsystem that we want mq. The
8769 * following should give the same answer for each host.
8770 */
8771 hpnt->nr_hw_queues = submit_queues;
8772 if (sdebug_host_max_queue)
8773 hpnt->host_tagset = 1;
8774
8775 /* poll queues are possible for nr_hw_queues > 1 */
8776 if (hpnt->nr_hw_queues == 1 || (poll_queues < 1)) {
8777 pr_warn("%s: trim poll_queues to 0. poll_q/nr_hw = (%d/%d)\n",
8778 my_name, poll_queues, hpnt->nr_hw_queues);
8779 poll_queues = 0;
8780 }
8781
8782 /*
8783 * Poll queues don't need interrupts, but we need at least one I/O queue
8784 * left over for non-polled I/O.
8785 * If condition not met, trim poll_queues to 1 (just for simplicity).
8786 */
8787 if (poll_queues >= submit_queues) {
8788 if (submit_queues < 3)
8789 pr_warn("%s: trim poll_queues to 1\n", my_name);
8790 else
8791 pr_warn("%s: trim poll_queues to 1. Perhaps try poll_queues=%d\n",
8792 my_name, submit_queues - 1);
8793 poll_queues = 1;
8794 }
8795 if (poll_queues)
8796 hpnt->nr_maps = 3;
8797
8798 sdbg_host->shost = hpnt;
8799 if ((hpnt->this_id >= 0) && (sdebug_num_tgts > hpnt->this_id))
8800 hpnt->max_id = sdebug_num_tgts + 1;
8801 else
8802 hpnt->max_id = sdebug_num_tgts;
8803 /* = sdebug_max_luns; */
8804 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
8805
8806 hprot = 0;
8807
8808 switch (sdebug_dif) {
8809
8810 case T10_PI_TYPE1_PROTECTION:
8811 hprot = SHOST_DIF_TYPE1_PROTECTION;
8812 if (sdebug_dix)
8813 hprot |= SHOST_DIX_TYPE1_PROTECTION;
8814 break;
8815
8816 case T10_PI_TYPE2_PROTECTION:
8817 hprot = SHOST_DIF_TYPE2_PROTECTION;
8818 if (sdebug_dix)
8819 hprot |= SHOST_DIX_TYPE2_PROTECTION;
8820 break;
8821
8822 case T10_PI_TYPE3_PROTECTION:
8823 hprot = SHOST_DIF_TYPE3_PROTECTION;
8824 if (sdebug_dix)
8825 hprot |= SHOST_DIX_TYPE3_PROTECTION;
8826 break;
8827
8828 default:
8829 if (sdebug_dix)
8830 hprot |= SHOST_DIX_TYPE0_PROTECTION;
8831 break;
8832 }
8833
8834 scsi_host_set_prot(hpnt, hprot);
8835
8836 if (have_dif_prot || sdebug_dix)
8837 pr_info("host protection%s%s%s%s%s%s%s\n",
8838 (hprot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
8839 (hprot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
8840 (hprot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
8841 (hprot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
8842 (hprot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
8843 (hprot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
8844 (hprot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
8845
8846 if (sdebug_guard == 1)
8847 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
8848 else
8849 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
8850
8851 sdebug_verbose = !!(SDEBUG_OPT_NOISE & sdebug_opts);
8852 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & sdebug_opts);
8853 if (sdebug_every_nth) /* need stats counters for every_nth */
8854 sdebug_statistics = true;
8855 error = scsi_add_host(hpnt, &sdbg_host->dev);
8856 if (error) {
8857 pr_err("scsi_add_host failed\n");
8858 error = -ENODEV;
8859 scsi_host_put(hpnt);
8860 } else {
8861 scsi_scan_host(hpnt);
8862 }
8863
8864 return error;
8865}
8866
8867static void sdebug_driver_remove(struct device *dev)
8868{
8869 struct sdebug_host_info *sdbg_host;
8870 struct sdebug_dev_info *sdbg_devinfo, *tmp;
8871
8872 sdbg_host = dev_to_sdebug_host(dev);
8873
8874 scsi_remove_host(sdbg_host->shost);
8875
8876 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
8877 dev_list) {
8878 list_del(&sdbg_devinfo->dev_list);
8879 kfree(sdbg_devinfo->zstate);
8880 kfree(sdbg_devinfo);
8881 }
8882
8883 scsi_host_put(sdbg_host->shost);
8884}
8885
8886static const struct bus_type pseudo_lld_bus = {
8887 .name = "pseudo",
8888 .probe = sdebug_driver_probe,
8889 .remove = sdebug_driver_remove,
8890 .drv_groups = sdebug_drv_groups,
8891};