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1/*
2 * vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
3 * Copyright (C) 1992 Eric Youngdale
4 * Simulate a host adapter with 2 disks attached. Do a lot of checking
5 * to make sure that we are not getting blocks mixed up, and PANIC if
6 * anything out of the ordinary is seen.
7 * ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
8 *
9 * This version is more generic, simulating a variable number of disk
10 * (or disk like devices) sharing a common amount of RAM. To be more
11 * realistic, the simulated devices have the transport attributes of
12 * SAS disks.
13 *
14 *
15 * For documentation see http://sg.danny.cz/sg/sdebug26.html
16 *
17 * D. Gilbert (dpg) work for Magneto-Optical device test [20010421]
18 * dpg: work for devfs large number of disks [20010809]
19 * forked for lk 2.5 series [20011216, 20020101]
20 * use vmalloc() more inquiry+mode_sense [20020302]
21 * add timers for delayed responses [20020721]
22 * Patrick Mansfield <patmans@us.ibm.com> max_luns+scsi_level [20021031]
23 * Mike Anderson <andmike@us.ibm.com> sysfs work [20021118]
24 * dpg: change style of boot options to "scsi_debug.num_tgts=2" and
25 * module options to "modprobe scsi_debug num_tgts=2" [20021221]
26 */
27
28#include <linux/module.h>
29
30#include <linux/kernel.h>
31#include <linux/errno.h>
32#include <linux/timer.h>
33#include <linux/slab.h>
34#include <linux/types.h>
35#include <linux/string.h>
36#include <linux/genhd.h>
37#include <linux/fs.h>
38#include <linux/init.h>
39#include <linux/proc_fs.h>
40#include <linux/vmalloc.h>
41#include <linux/moduleparam.h>
42#include <linux/scatterlist.h>
43#include <linux/blkdev.h>
44#include <linux/crc-t10dif.h>
45
46#include <net/checksum.h>
47
48#include <asm/unaligned.h>
49
50#include <scsi/scsi.h>
51#include <scsi/scsi_cmnd.h>
52#include <scsi/scsi_device.h>
53#include <scsi/scsi_host.h>
54#include <scsi/scsicam.h>
55#include <scsi/scsi_eh.h>
56#include <scsi/scsi_dbg.h>
57
58#include "sd.h"
59#include "scsi_logging.h"
60
61#define SCSI_DEBUG_VERSION "1.82"
62static const char * scsi_debug_version_date = "20100324";
63
64/* Additional Sense Code (ASC) */
65#define NO_ADDITIONAL_SENSE 0x0
66#define LOGICAL_UNIT_NOT_READY 0x4
67#define UNRECOVERED_READ_ERR 0x11
68#define PARAMETER_LIST_LENGTH_ERR 0x1a
69#define INVALID_OPCODE 0x20
70#define ADDR_OUT_OF_RANGE 0x21
71#define INVALID_COMMAND_OPCODE 0x20
72#define INVALID_FIELD_IN_CDB 0x24
73#define INVALID_FIELD_IN_PARAM_LIST 0x26
74#define POWERON_RESET 0x29
75#define SAVING_PARAMS_UNSUP 0x39
76#define TRANSPORT_PROBLEM 0x4b
77#define THRESHOLD_EXCEEDED 0x5d
78#define LOW_POWER_COND_ON 0x5e
79
80/* Additional Sense Code Qualifier (ASCQ) */
81#define ACK_NAK_TO 0x3
82
83#define SDEBUG_TAGGED_QUEUING 0 /* 0 | MSG_SIMPLE_TAG | MSG_ORDERED_TAG */
84
85/* Default values for driver parameters */
86#define DEF_NUM_HOST 1
87#define DEF_NUM_TGTS 1
88#define DEF_MAX_LUNS 1
89/* With these defaults, this driver will make 1 host with 1 target
90 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
91 */
92#define DEF_ATO 1
93#define DEF_DELAY 1
94#define DEF_DEV_SIZE_MB 8
95#define DEF_DIF 0
96#define DEF_DIX 0
97#define DEF_D_SENSE 0
98#define DEF_EVERY_NTH 0
99#define DEF_FAKE_RW 0
100#define DEF_GUARD 0
101#define DEF_LBPU 0
102#define DEF_LBPWS 0
103#define DEF_LBPWS10 0
104#define DEF_LOWEST_ALIGNED 0
105#define DEF_NO_LUN_0 0
106#define DEF_NUM_PARTS 0
107#define DEF_OPTS 0
108#define DEF_OPT_BLKS 64
109#define DEF_PHYSBLK_EXP 0
110#define DEF_PTYPE 0
111#define DEF_SCSI_LEVEL 5 /* INQUIRY, byte2 [5->SPC-3] */
112#define DEF_SECTOR_SIZE 512
113#define DEF_UNMAP_ALIGNMENT 0
114#define DEF_UNMAP_GRANULARITY 1
115#define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
116#define DEF_UNMAP_MAX_DESC 256
117#define DEF_VIRTUAL_GB 0
118#define DEF_VPD_USE_HOSTNO 1
119#define DEF_WRITESAME_LENGTH 0xFFFF
120
121/* bit mask values for scsi_debug_opts */
122#define SCSI_DEBUG_OPT_NOISE 1
123#define SCSI_DEBUG_OPT_MEDIUM_ERR 2
124#define SCSI_DEBUG_OPT_TIMEOUT 4
125#define SCSI_DEBUG_OPT_RECOVERED_ERR 8
126#define SCSI_DEBUG_OPT_TRANSPORT_ERR 16
127#define SCSI_DEBUG_OPT_DIF_ERR 32
128#define SCSI_DEBUG_OPT_DIX_ERR 64
129/* When "every_nth" > 0 then modulo "every_nth" commands:
130 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
131 * - a RECOVERED_ERROR is simulated on successful read and write
132 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
133 * - a TRANSPORT_ERROR is simulated on successful read and write
134 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
135 *
136 * When "every_nth" < 0 then after "- every_nth" commands:
137 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
138 * - a RECOVERED_ERROR is simulated on successful read and write
139 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
140 * - a TRANSPORT_ERROR is simulated on successful read and write
141 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
142 * This will continue until some other action occurs (e.g. the user
143 * writing a new value (other than -1 or 1) to every_nth via sysfs).
144 */
145
146/* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
147 * sector on read commands: */
148#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
149#define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
150
151/* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
152 * or "peripheral device" addressing (value 0) */
153#define SAM2_LUN_ADDRESS_METHOD 0
154#define SAM2_WLUN_REPORT_LUNS 0xc101
155
156/* Can queue up to this number of commands. Typically commands that
157 * that have a non-zero delay are queued. */
158#define SCSI_DEBUG_CANQUEUE 255
159
160static int scsi_debug_add_host = DEF_NUM_HOST;
161static int scsi_debug_ato = DEF_ATO;
162static int scsi_debug_delay = DEF_DELAY;
163static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB;
164static int scsi_debug_dif = DEF_DIF;
165static int scsi_debug_dix = DEF_DIX;
166static int scsi_debug_dsense = DEF_D_SENSE;
167static int scsi_debug_every_nth = DEF_EVERY_NTH;
168static int scsi_debug_fake_rw = DEF_FAKE_RW;
169static int scsi_debug_guard = DEF_GUARD;
170static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED;
171static int scsi_debug_max_luns = DEF_MAX_LUNS;
172static int scsi_debug_max_queue = SCSI_DEBUG_CANQUEUE;
173static int scsi_debug_no_lun_0 = DEF_NO_LUN_0;
174static int scsi_debug_no_uld = 0;
175static int scsi_debug_num_parts = DEF_NUM_PARTS;
176static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */
177static int scsi_debug_opt_blks = DEF_OPT_BLKS;
178static int scsi_debug_opts = DEF_OPTS;
179static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP;
180static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */
181static int scsi_debug_scsi_level = DEF_SCSI_LEVEL;
182static int scsi_debug_sector_size = DEF_SECTOR_SIZE;
183static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB;
184static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
185static unsigned int scsi_debug_lbpu = DEF_LBPU;
186static unsigned int scsi_debug_lbpws = DEF_LBPWS;
187static unsigned int scsi_debug_lbpws10 = DEF_LBPWS10;
188static unsigned int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
189static unsigned int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY;
190static unsigned int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
191static unsigned int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
192static unsigned int scsi_debug_write_same_length = DEF_WRITESAME_LENGTH;
193
194static int scsi_debug_cmnd_count = 0;
195
196#define DEV_READONLY(TGT) (0)
197#define DEV_REMOVEABLE(TGT) (0)
198
199static unsigned int sdebug_store_sectors;
200static sector_t sdebug_capacity; /* in sectors */
201
202/* old BIOS stuff, kernel may get rid of them but some mode sense pages
203 may still need them */
204static int sdebug_heads; /* heads per disk */
205static int sdebug_cylinders_per; /* cylinders per surface */
206static int sdebug_sectors_per; /* sectors per cylinder */
207
208#define SDEBUG_MAX_PARTS 4
209
210#define SDEBUG_SENSE_LEN 32
211
212#define SCSI_DEBUG_MAX_CMD_LEN 32
213
214static unsigned int scsi_debug_lbp(void)
215{
216 return scsi_debug_lbpu | scsi_debug_lbpws | scsi_debug_lbpws10;
217}
218
219struct sdebug_dev_info {
220 struct list_head dev_list;
221 unsigned char sense_buff[SDEBUG_SENSE_LEN]; /* weak nexus */
222 unsigned int channel;
223 unsigned int target;
224 unsigned int lun;
225 struct sdebug_host_info *sdbg_host;
226 unsigned int wlun;
227 char reset;
228 char stopped;
229 char used;
230};
231
232struct sdebug_host_info {
233 struct list_head host_list;
234 struct Scsi_Host *shost;
235 struct device dev;
236 struct list_head dev_info_list;
237};
238
239#define to_sdebug_host(d) \
240 container_of(d, struct sdebug_host_info, dev)
241
242static LIST_HEAD(sdebug_host_list);
243static DEFINE_SPINLOCK(sdebug_host_list_lock);
244
245typedef void (* done_funct_t) (struct scsi_cmnd *);
246
247struct sdebug_queued_cmd {
248 int in_use;
249 struct timer_list cmnd_timer;
250 done_funct_t done_funct;
251 struct scsi_cmnd * a_cmnd;
252 int scsi_result;
253};
254static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
255
256static unsigned char * fake_storep; /* ramdisk storage */
257static unsigned char *dif_storep; /* protection info */
258static void *map_storep; /* provisioning map */
259
260static unsigned long map_size;
261static int num_aborts = 0;
262static int num_dev_resets = 0;
263static int num_bus_resets = 0;
264static int num_host_resets = 0;
265static int dix_writes;
266static int dix_reads;
267static int dif_errors;
268
269static DEFINE_SPINLOCK(queued_arr_lock);
270static DEFINE_RWLOCK(atomic_rw);
271
272static char sdebug_proc_name[] = "scsi_debug";
273
274static struct bus_type pseudo_lld_bus;
275
276static inline sector_t dif_offset(sector_t sector)
277{
278 return sector << 3;
279}
280
281static struct device_driver sdebug_driverfs_driver = {
282 .name = sdebug_proc_name,
283 .bus = &pseudo_lld_bus,
284};
285
286static const int check_condition_result =
287 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
288
289static const int illegal_condition_result =
290 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
291
292static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
293 0, 0, 0x2, 0x4b};
294static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
295 0, 0, 0x0, 0x0};
296
297static int sdebug_add_adapter(void);
298static void sdebug_remove_adapter(void);
299
300static void sdebug_max_tgts_luns(void)
301{
302 struct sdebug_host_info *sdbg_host;
303 struct Scsi_Host *hpnt;
304
305 spin_lock(&sdebug_host_list_lock);
306 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
307 hpnt = sdbg_host->shost;
308 if ((hpnt->this_id >= 0) &&
309 (scsi_debug_num_tgts > hpnt->this_id))
310 hpnt->max_id = scsi_debug_num_tgts + 1;
311 else
312 hpnt->max_id = scsi_debug_num_tgts;
313 /* scsi_debug_max_luns; */
314 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS;
315 }
316 spin_unlock(&sdebug_host_list_lock);
317}
318
319static void mk_sense_buffer(struct sdebug_dev_info *devip, int key,
320 int asc, int asq)
321{
322 unsigned char *sbuff;
323
324 sbuff = devip->sense_buff;
325 memset(sbuff, 0, SDEBUG_SENSE_LEN);
326
327 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, key, asc, asq);
328
329 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
330 printk(KERN_INFO "scsi_debug: [sense_key,asc,ascq]: "
331 "[0x%x,0x%x,0x%x]\n", key, asc, asq);
332}
333
334static void get_data_transfer_info(unsigned char *cmd,
335 unsigned long long *lba, unsigned int *num,
336 u32 *ei_lba)
337{
338 *ei_lba = 0;
339
340 switch (*cmd) {
341 case VARIABLE_LENGTH_CMD:
342 *lba = (u64)cmd[19] | (u64)cmd[18] << 8 |
343 (u64)cmd[17] << 16 | (u64)cmd[16] << 24 |
344 (u64)cmd[15] << 32 | (u64)cmd[14] << 40 |
345 (u64)cmd[13] << 48 | (u64)cmd[12] << 56;
346
347 *ei_lba = (u32)cmd[23] | (u32)cmd[22] << 8 |
348 (u32)cmd[21] << 16 | (u32)cmd[20] << 24;
349
350 *num = (u32)cmd[31] | (u32)cmd[30] << 8 | (u32)cmd[29] << 16 |
351 (u32)cmd[28] << 24;
352 break;
353
354 case WRITE_SAME_16:
355 case WRITE_16:
356 case READ_16:
357 *lba = (u64)cmd[9] | (u64)cmd[8] << 8 |
358 (u64)cmd[7] << 16 | (u64)cmd[6] << 24 |
359 (u64)cmd[5] << 32 | (u64)cmd[4] << 40 |
360 (u64)cmd[3] << 48 | (u64)cmd[2] << 56;
361
362 *num = (u32)cmd[13] | (u32)cmd[12] << 8 | (u32)cmd[11] << 16 |
363 (u32)cmd[10] << 24;
364 break;
365 case WRITE_12:
366 case READ_12:
367 *lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 |
368 (u32)cmd[2] << 24;
369
370 *num = (u32)cmd[9] | (u32)cmd[8] << 8 | (u32)cmd[7] << 16 |
371 (u32)cmd[6] << 24;
372 break;
373 case WRITE_SAME:
374 case WRITE_10:
375 case READ_10:
376 case XDWRITEREAD_10:
377 *lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 |
378 (u32)cmd[2] << 24;
379
380 *num = (u32)cmd[8] | (u32)cmd[7] << 8;
381 break;
382 case WRITE_6:
383 case READ_6:
384 *lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
385 (u32)(cmd[1] & 0x1f) << 16;
386 *num = (0 == cmd[4]) ? 256 : cmd[4];
387 break;
388 default:
389 break;
390 }
391}
392
393static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
394{
395 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
396 printk(KERN_INFO "scsi_debug: ioctl: cmd=0x%x\n", cmd);
397 }
398 return -EINVAL;
399 /* return -ENOTTY; // correct return but upsets fdisk */
400}
401
402static int check_readiness(struct scsi_cmnd * SCpnt, int reset_only,
403 struct sdebug_dev_info * devip)
404{
405 if (devip->reset) {
406 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
407 printk(KERN_INFO "scsi_debug: Reporting Unit "
408 "attention: power on reset\n");
409 devip->reset = 0;
410 mk_sense_buffer(devip, UNIT_ATTENTION, POWERON_RESET, 0);
411 return check_condition_result;
412 }
413 if ((0 == reset_only) && devip->stopped) {
414 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
415 printk(KERN_INFO "scsi_debug: Reporting Not "
416 "ready: initializing command required\n");
417 mk_sense_buffer(devip, NOT_READY, LOGICAL_UNIT_NOT_READY,
418 0x2);
419 return check_condition_result;
420 }
421 return 0;
422}
423
424/* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */
425static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
426 int arr_len)
427{
428 int act_len;
429 struct scsi_data_buffer *sdb = scsi_in(scp);
430
431 if (!sdb->length)
432 return 0;
433 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
434 return (DID_ERROR << 16);
435
436 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
437 arr, arr_len);
438 if (sdb->resid)
439 sdb->resid -= act_len;
440 else
441 sdb->resid = scsi_bufflen(scp) - act_len;
442
443 return 0;
444}
445
446/* Returns number of bytes fetched into 'arr' or -1 if error. */
447static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
448 int arr_len)
449{
450 if (!scsi_bufflen(scp))
451 return 0;
452 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE))
453 return -1;
454
455 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
456}
457
458
459static const char * inq_vendor_id = "Linux ";
460static const char * inq_product_id = "scsi_debug ";
461static const char * inq_product_rev = "0004";
462
463static int inquiry_evpd_83(unsigned char * arr, int port_group_id,
464 int target_dev_id, int dev_id_num,
465 const char * dev_id_str,
466 int dev_id_str_len)
467{
468 int num, port_a;
469 char b[32];
470
471 port_a = target_dev_id + 1;
472 /* T10 vendor identifier field format (faked) */
473 arr[0] = 0x2; /* ASCII */
474 arr[1] = 0x1;
475 arr[2] = 0x0;
476 memcpy(&arr[4], inq_vendor_id, 8);
477 memcpy(&arr[12], inq_product_id, 16);
478 memcpy(&arr[28], dev_id_str, dev_id_str_len);
479 num = 8 + 16 + dev_id_str_len;
480 arr[3] = num;
481 num += 4;
482 if (dev_id_num >= 0) {
483 /* NAA-5, Logical unit identifier (binary) */
484 arr[num++] = 0x1; /* binary (not necessarily sas) */
485 arr[num++] = 0x3; /* PIV=0, lu, naa */
486 arr[num++] = 0x0;
487 arr[num++] = 0x8;
488 arr[num++] = 0x53; /* naa-5 ieee company id=0x333333 (fake) */
489 arr[num++] = 0x33;
490 arr[num++] = 0x33;
491 arr[num++] = 0x30;
492 arr[num++] = (dev_id_num >> 24);
493 arr[num++] = (dev_id_num >> 16) & 0xff;
494 arr[num++] = (dev_id_num >> 8) & 0xff;
495 arr[num++] = dev_id_num & 0xff;
496 /* Target relative port number */
497 arr[num++] = 0x61; /* proto=sas, binary */
498 arr[num++] = 0x94; /* PIV=1, target port, rel port */
499 arr[num++] = 0x0; /* reserved */
500 arr[num++] = 0x4; /* length */
501 arr[num++] = 0x0; /* reserved */
502 arr[num++] = 0x0; /* reserved */
503 arr[num++] = 0x0;
504 arr[num++] = 0x1; /* relative port A */
505 }
506 /* NAA-5, Target port identifier */
507 arr[num++] = 0x61; /* proto=sas, binary */
508 arr[num++] = 0x93; /* piv=1, target port, naa */
509 arr[num++] = 0x0;
510 arr[num++] = 0x8;
511 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
512 arr[num++] = 0x22;
513 arr[num++] = 0x22;
514 arr[num++] = 0x20;
515 arr[num++] = (port_a >> 24);
516 arr[num++] = (port_a >> 16) & 0xff;
517 arr[num++] = (port_a >> 8) & 0xff;
518 arr[num++] = port_a & 0xff;
519 /* NAA-5, Target port group identifier */
520 arr[num++] = 0x61; /* proto=sas, binary */
521 arr[num++] = 0x95; /* piv=1, target port group id */
522 arr[num++] = 0x0;
523 arr[num++] = 0x4;
524 arr[num++] = 0;
525 arr[num++] = 0;
526 arr[num++] = (port_group_id >> 8) & 0xff;
527 arr[num++] = port_group_id & 0xff;
528 /* NAA-5, Target device identifier */
529 arr[num++] = 0x61; /* proto=sas, binary */
530 arr[num++] = 0xa3; /* piv=1, target device, naa */
531 arr[num++] = 0x0;
532 arr[num++] = 0x8;
533 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
534 arr[num++] = 0x22;
535 arr[num++] = 0x22;
536 arr[num++] = 0x20;
537 arr[num++] = (target_dev_id >> 24);
538 arr[num++] = (target_dev_id >> 16) & 0xff;
539 arr[num++] = (target_dev_id >> 8) & 0xff;
540 arr[num++] = target_dev_id & 0xff;
541 /* SCSI name string: Target device identifier */
542 arr[num++] = 0x63; /* proto=sas, UTF-8 */
543 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
544 arr[num++] = 0x0;
545 arr[num++] = 24;
546 memcpy(arr + num, "naa.52222220", 12);
547 num += 12;
548 snprintf(b, sizeof(b), "%08X", target_dev_id);
549 memcpy(arr + num, b, 8);
550 num += 8;
551 memset(arr + num, 0, 4);
552 num += 4;
553 return num;
554}
555
556
557static unsigned char vpd84_data[] = {
558/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
559 0x22,0x22,0x22,0x0,0xbb,0x1,
560 0x22,0x22,0x22,0x0,0xbb,0x2,
561};
562
563static int inquiry_evpd_84(unsigned char * arr)
564{
565 memcpy(arr, vpd84_data, sizeof(vpd84_data));
566 return sizeof(vpd84_data);
567}
568
569static int inquiry_evpd_85(unsigned char * arr)
570{
571 int num = 0;
572 const char * na1 = "https://www.kernel.org/config";
573 const char * na2 = "http://www.kernel.org/log";
574 int plen, olen;
575
576 arr[num++] = 0x1; /* lu, storage config */
577 arr[num++] = 0x0; /* reserved */
578 arr[num++] = 0x0;
579 olen = strlen(na1);
580 plen = olen + 1;
581 if (plen % 4)
582 plen = ((plen / 4) + 1) * 4;
583 arr[num++] = plen; /* length, null termianted, padded */
584 memcpy(arr + num, na1, olen);
585 memset(arr + num + olen, 0, plen - olen);
586 num += plen;
587
588 arr[num++] = 0x4; /* lu, logging */
589 arr[num++] = 0x0; /* reserved */
590 arr[num++] = 0x0;
591 olen = strlen(na2);
592 plen = olen + 1;
593 if (plen % 4)
594 plen = ((plen / 4) + 1) * 4;
595 arr[num++] = plen; /* length, null terminated, padded */
596 memcpy(arr + num, na2, olen);
597 memset(arr + num + olen, 0, plen - olen);
598 num += plen;
599
600 return num;
601}
602
603/* SCSI ports VPD page */
604static int inquiry_evpd_88(unsigned char * arr, int target_dev_id)
605{
606 int num = 0;
607 int port_a, port_b;
608
609 port_a = target_dev_id + 1;
610 port_b = port_a + 1;
611 arr[num++] = 0x0; /* reserved */
612 arr[num++] = 0x0; /* reserved */
613 arr[num++] = 0x0;
614 arr[num++] = 0x1; /* relative port 1 (primary) */
615 memset(arr + num, 0, 6);
616 num += 6;
617 arr[num++] = 0x0;
618 arr[num++] = 12; /* length tp descriptor */
619 /* naa-5 target port identifier (A) */
620 arr[num++] = 0x61; /* proto=sas, binary */
621 arr[num++] = 0x93; /* PIV=1, target port, NAA */
622 arr[num++] = 0x0; /* reserved */
623 arr[num++] = 0x8; /* length */
624 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
625 arr[num++] = 0x22;
626 arr[num++] = 0x22;
627 arr[num++] = 0x20;
628 arr[num++] = (port_a >> 24);
629 arr[num++] = (port_a >> 16) & 0xff;
630 arr[num++] = (port_a >> 8) & 0xff;
631 arr[num++] = port_a & 0xff;
632
633 arr[num++] = 0x0; /* reserved */
634 arr[num++] = 0x0; /* reserved */
635 arr[num++] = 0x0;
636 arr[num++] = 0x2; /* relative port 2 (secondary) */
637 memset(arr + num, 0, 6);
638 num += 6;
639 arr[num++] = 0x0;
640 arr[num++] = 12; /* length tp descriptor */
641 /* naa-5 target port identifier (B) */
642 arr[num++] = 0x61; /* proto=sas, binary */
643 arr[num++] = 0x93; /* PIV=1, target port, NAA */
644 arr[num++] = 0x0; /* reserved */
645 arr[num++] = 0x8; /* length */
646 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
647 arr[num++] = 0x22;
648 arr[num++] = 0x22;
649 arr[num++] = 0x20;
650 arr[num++] = (port_b >> 24);
651 arr[num++] = (port_b >> 16) & 0xff;
652 arr[num++] = (port_b >> 8) & 0xff;
653 arr[num++] = port_b & 0xff;
654
655 return num;
656}
657
658
659static unsigned char vpd89_data[] = {
660/* from 4th byte */ 0,0,0,0,
661'l','i','n','u','x',' ',' ',' ',
662'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
663'1','2','3','4',
6640x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
6650xec,0,0,0,
6660x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
6670,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
6680x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
6690x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
6700x53,0x41,
6710x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
6720x20,0x20,
6730x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
6740x10,0x80,
6750,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
6760x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
6770x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
6780,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
6790x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
6800x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
6810,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
6820,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6830,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6840,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6850x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
6860,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
6870xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
6880,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
6890,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6900,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6910,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6920,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6930,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6940,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6950,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6960,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6970,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6980,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6990,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
7000,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
701};
702
703static int inquiry_evpd_89(unsigned char * arr)
704{
705 memcpy(arr, vpd89_data, sizeof(vpd89_data));
706 return sizeof(vpd89_data);
707}
708
709
710/* Block limits VPD page (SBC-3) */
711static unsigned char vpdb0_data[] = {
712 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
713 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
714 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
715 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
716};
717
718static int inquiry_evpd_b0(unsigned char * arr)
719{
720 unsigned int gran;
721
722 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
723
724 /* Optimal transfer length granularity */
725 gran = 1 << scsi_debug_physblk_exp;
726 arr[2] = (gran >> 8) & 0xff;
727 arr[3] = gran & 0xff;
728
729 /* Maximum Transfer Length */
730 if (sdebug_store_sectors > 0x400) {
731 arr[4] = (sdebug_store_sectors >> 24) & 0xff;
732 arr[5] = (sdebug_store_sectors >> 16) & 0xff;
733 arr[6] = (sdebug_store_sectors >> 8) & 0xff;
734 arr[7] = sdebug_store_sectors & 0xff;
735 }
736
737 /* Optimal Transfer Length */
738 put_unaligned_be32(scsi_debug_opt_blks, &arr[8]);
739
740 if (scsi_debug_lbpu) {
741 /* Maximum Unmap LBA Count */
742 put_unaligned_be32(scsi_debug_unmap_max_blocks, &arr[16]);
743
744 /* Maximum Unmap Block Descriptor Count */
745 put_unaligned_be32(scsi_debug_unmap_max_desc, &arr[20]);
746 }
747
748 /* Unmap Granularity Alignment */
749 if (scsi_debug_unmap_alignment) {
750 put_unaligned_be32(scsi_debug_unmap_alignment, &arr[28]);
751 arr[28] |= 0x80; /* UGAVALID */
752 }
753
754 /* Optimal Unmap Granularity */
755 put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]);
756
757 /* Maximum WRITE SAME Length */
758 put_unaligned_be64(scsi_debug_write_same_length, &arr[32]);
759
760 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
761
762 return sizeof(vpdb0_data);
763}
764
765/* Block device characteristics VPD page (SBC-3) */
766static int inquiry_evpd_b1(unsigned char *arr)
767{
768 memset(arr, 0, 0x3c);
769 arr[0] = 0;
770 arr[1] = 1; /* non rotating medium (e.g. solid state) */
771 arr[2] = 0;
772 arr[3] = 5; /* less than 1.8" */
773
774 return 0x3c;
775}
776
777/* Thin provisioning VPD page (SBC-3) */
778static int inquiry_evpd_b2(unsigned char *arr)
779{
780 memset(arr, 0, 0x8);
781 arr[0] = 0; /* threshold exponent */
782
783 if (scsi_debug_lbpu)
784 arr[1] = 1 << 7;
785
786 if (scsi_debug_lbpws)
787 arr[1] |= 1 << 6;
788
789 if (scsi_debug_lbpws10)
790 arr[1] |= 1 << 5;
791
792 return 0x8;
793}
794
795#define SDEBUG_LONG_INQ_SZ 96
796#define SDEBUG_MAX_INQ_ARR_SZ 584
797
798static int resp_inquiry(struct scsi_cmnd * scp, int target,
799 struct sdebug_dev_info * devip)
800{
801 unsigned char pq_pdt;
802 unsigned char * arr;
803 unsigned char *cmd = (unsigned char *)scp->cmnd;
804 int alloc_len, n, ret;
805
806 alloc_len = (cmd[3] << 8) + cmd[4];
807 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
808 if (! arr)
809 return DID_REQUEUE << 16;
810 if (devip->wlun)
811 pq_pdt = 0x1e; /* present, wlun */
812 else if (scsi_debug_no_lun_0 && (0 == devip->lun))
813 pq_pdt = 0x7f; /* not present, no device type */
814 else
815 pq_pdt = (scsi_debug_ptype & 0x1f);
816 arr[0] = pq_pdt;
817 if (0x2 & cmd[1]) { /* CMDDT bit set */
818 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
819 0);
820 kfree(arr);
821 return check_condition_result;
822 } else if (0x1 & cmd[1]) { /* EVPD bit set */
823 int lu_id_num, port_group_id, target_dev_id, len;
824 char lu_id_str[6];
825 int host_no = devip->sdbg_host->shost->host_no;
826
827 port_group_id = (((host_no + 1) & 0x7f) << 8) +
828 (devip->channel & 0x7f);
829 if (0 == scsi_debug_vpd_use_hostno)
830 host_no = 0;
831 lu_id_num = devip->wlun ? -1 : (((host_no + 1) * 2000) +
832 (devip->target * 1000) + devip->lun);
833 target_dev_id = ((host_no + 1) * 2000) +
834 (devip->target * 1000) - 3;
835 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
836 if (0 == cmd[2]) { /* supported vital product data pages */
837 arr[1] = cmd[2]; /*sanity */
838 n = 4;
839 arr[n++] = 0x0; /* this page */
840 arr[n++] = 0x80; /* unit serial number */
841 arr[n++] = 0x83; /* device identification */
842 arr[n++] = 0x84; /* software interface ident. */
843 arr[n++] = 0x85; /* management network addresses */
844 arr[n++] = 0x86; /* extended inquiry */
845 arr[n++] = 0x87; /* mode page policy */
846 arr[n++] = 0x88; /* SCSI ports */
847 arr[n++] = 0x89; /* ATA information */
848 arr[n++] = 0xb0; /* Block limits (SBC) */
849 arr[n++] = 0xb1; /* Block characteristics (SBC) */
850 if (scsi_debug_lbp()) /* Logical Block Prov. (SBC) */
851 arr[n++] = 0xb2;
852 arr[3] = n - 4; /* number of supported VPD pages */
853 } else if (0x80 == cmd[2]) { /* unit serial number */
854 arr[1] = cmd[2]; /*sanity */
855 arr[3] = len;
856 memcpy(&arr[4], lu_id_str, len);
857 } else if (0x83 == cmd[2]) { /* device identification */
858 arr[1] = cmd[2]; /*sanity */
859 arr[3] = inquiry_evpd_83(&arr[4], port_group_id,
860 target_dev_id, lu_id_num,
861 lu_id_str, len);
862 } else if (0x84 == cmd[2]) { /* Software interface ident. */
863 arr[1] = cmd[2]; /*sanity */
864 arr[3] = inquiry_evpd_84(&arr[4]);
865 } else if (0x85 == cmd[2]) { /* Management network addresses */
866 arr[1] = cmd[2]; /*sanity */
867 arr[3] = inquiry_evpd_85(&arr[4]);
868 } else if (0x86 == cmd[2]) { /* extended inquiry */
869 arr[1] = cmd[2]; /*sanity */
870 arr[3] = 0x3c; /* number of following entries */
871 if (scsi_debug_dif == SD_DIF_TYPE3_PROTECTION)
872 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
873 else if (scsi_debug_dif)
874 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
875 else
876 arr[4] = 0x0; /* no protection stuff */
877 arr[5] = 0x7; /* head of q, ordered + simple q's */
878 } else if (0x87 == cmd[2]) { /* mode page policy */
879 arr[1] = cmd[2]; /*sanity */
880 arr[3] = 0x8; /* number of following entries */
881 arr[4] = 0x2; /* disconnect-reconnect mp */
882 arr[6] = 0x80; /* mlus, shared */
883 arr[8] = 0x18; /* protocol specific lu */
884 arr[10] = 0x82; /* mlus, per initiator port */
885 } else if (0x88 == cmd[2]) { /* SCSI Ports */
886 arr[1] = cmd[2]; /*sanity */
887 arr[3] = inquiry_evpd_88(&arr[4], target_dev_id);
888 } else if (0x89 == cmd[2]) { /* ATA information */
889 arr[1] = cmd[2]; /*sanity */
890 n = inquiry_evpd_89(&arr[4]);
891 arr[2] = (n >> 8);
892 arr[3] = (n & 0xff);
893 } else if (0xb0 == cmd[2]) { /* Block limits (SBC) */
894 arr[1] = cmd[2]; /*sanity */
895 arr[3] = inquiry_evpd_b0(&arr[4]);
896 } else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */
897 arr[1] = cmd[2]; /*sanity */
898 arr[3] = inquiry_evpd_b1(&arr[4]);
899 } else if (0xb2 == cmd[2]) { /* Logical Block Prov. (SBC) */
900 arr[1] = cmd[2]; /*sanity */
901 arr[3] = inquiry_evpd_b2(&arr[4]);
902 } else {
903 /* Illegal request, invalid field in cdb */
904 mk_sense_buffer(devip, ILLEGAL_REQUEST,
905 INVALID_FIELD_IN_CDB, 0);
906 kfree(arr);
907 return check_condition_result;
908 }
909 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
910 ret = fill_from_dev_buffer(scp, arr,
911 min(len, SDEBUG_MAX_INQ_ARR_SZ));
912 kfree(arr);
913 return ret;
914 }
915 /* drops through here for a standard inquiry */
916 arr[1] = DEV_REMOVEABLE(target) ? 0x80 : 0; /* Removable disk */
917 arr[2] = scsi_debug_scsi_level;
918 arr[3] = 2; /* response_data_format==2 */
919 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
920 arr[5] = scsi_debug_dif ? 1 : 0; /* PROTECT bit */
921 if (0 == scsi_debug_vpd_use_hostno)
922 arr[5] = 0x10; /* claim: implicit TGPS */
923 arr[6] = 0x10; /* claim: MultiP */
924 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
925 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
926 memcpy(&arr[8], inq_vendor_id, 8);
927 memcpy(&arr[16], inq_product_id, 16);
928 memcpy(&arr[32], inq_product_rev, 4);
929 /* version descriptors (2 bytes each) follow */
930 arr[58] = 0x0; arr[59] = 0x77; /* SAM-3 ANSI */
931 arr[60] = 0x3; arr[61] = 0x14; /* SPC-3 ANSI */
932 n = 62;
933 if (scsi_debug_ptype == 0) {
934 arr[n++] = 0x3; arr[n++] = 0x3d; /* SBC-2 ANSI */
935 } else if (scsi_debug_ptype == 1) {
936 arr[n++] = 0x3; arr[n++] = 0x60; /* SSC-2 no version */
937 }
938 arr[n++] = 0xc; arr[n++] = 0xf; /* SAS-1.1 rev 10 */
939 ret = fill_from_dev_buffer(scp, arr,
940 min(alloc_len, SDEBUG_LONG_INQ_SZ));
941 kfree(arr);
942 return ret;
943}
944
945static int resp_requests(struct scsi_cmnd * scp,
946 struct sdebug_dev_info * devip)
947{
948 unsigned char * sbuff;
949 unsigned char *cmd = (unsigned char *)scp->cmnd;
950 unsigned char arr[SDEBUG_SENSE_LEN];
951 int want_dsense;
952 int len = 18;
953
954 memset(arr, 0, sizeof(arr));
955 if (devip->reset == 1)
956 mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0);
957 want_dsense = !!(cmd[1] & 1) || scsi_debug_dsense;
958 sbuff = devip->sense_buff;
959 if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
960 if (want_dsense) {
961 arr[0] = 0x72;
962 arr[1] = 0x0; /* NO_SENSE in sense_key */
963 arr[2] = THRESHOLD_EXCEEDED;
964 arr[3] = 0xff; /* TEST set and MRIE==6 */
965 } else {
966 arr[0] = 0x70;
967 arr[2] = 0x0; /* NO_SENSE in sense_key */
968 arr[7] = 0xa; /* 18 byte sense buffer */
969 arr[12] = THRESHOLD_EXCEEDED;
970 arr[13] = 0xff; /* TEST set and MRIE==6 */
971 }
972 } else {
973 memcpy(arr, sbuff, SDEBUG_SENSE_LEN);
974 if ((cmd[1] & 1) && (! scsi_debug_dsense)) {
975 /* DESC bit set and sense_buff in fixed format */
976 memset(arr, 0, sizeof(arr));
977 arr[0] = 0x72;
978 arr[1] = sbuff[2]; /* sense key */
979 arr[2] = sbuff[12]; /* asc */
980 arr[3] = sbuff[13]; /* ascq */
981 len = 8;
982 }
983 }
984 mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0);
985 return fill_from_dev_buffer(scp, arr, len);
986}
987
988static int resp_start_stop(struct scsi_cmnd * scp,
989 struct sdebug_dev_info * devip)
990{
991 unsigned char *cmd = (unsigned char *)scp->cmnd;
992 int power_cond, errsts, start;
993
994 if ((errsts = check_readiness(scp, 1, devip)))
995 return errsts;
996 power_cond = (cmd[4] & 0xf0) >> 4;
997 if (power_cond) {
998 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
999 0);
1000 return check_condition_result;
1001 }
1002 start = cmd[4] & 1;
1003 if (start == devip->stopped)
1004 devip->stopped = !start;
1005 return 0;
1006}
1007
1008static sector_t get_sdebug_capacity(void)
1009{
1010 if (scsi_debug_virtual_gb > 0)
1011 return (sector_t)scsi_debug_virtual_gb *
1012 (1073741824 / scsi_debug_sector_size);
1013 else
1014 return sdebug_store_sectors;
1015}
1016
1017#define SDEBUG_READCAP_ARR_SZ 8
1018static int resp_readcap(struct scsi_cmnd * scp,
1019 struct sdebug_dev_info * devip)
1020{
1021 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
1022 unsigned int capac;
1023 int errsts;
1024
1025 if ((errsts = check_readiness(scp, 1, devip)))
1026 return errsts;
1027 /* following just in case virtual_gb changed */
1028 sdebug_capacity = get_sdebug_capacity();
1029 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
1030 if (sdebug_capacity < 0xffffffff) {
1031 capac = (unsigned int)sdebug_capacity - 1;
1032 arr[0] = (capac >> 24);
1033 arr[1] = (capac >> 16) & 0xff;
1034 arr[2] = (capac >> 8) & 0xff;
1035 arr[3] = capac & 0xff;
1036 } else {
1037 arr[0] = 0xff;
1038 arr[1] = 0xff;
1039 arr[2] = 0xff;
1040 arr[3] = 0xff;
1041 }
1042 arr[6] = (scsi_debug_sector_size >> 8) & 0xff;
1043 arr[7] = scsi_debug_sector_size & 0xff;
1044 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1045}
1046
1047#define SDEBUG_READCAP16_ARR_SZ 32
1048static int resp_readcap16(struct scsi_cmnd * scp,
1049 struct sdebug_dev_info * devip)
1050{
1051 unsigned char *cmd = (unsigned char *)scp->cmnd;
1052 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
1053 unsigned long long capac;
1054 int errsts, k, alloc_len;
1055
1056 if ((errsts = check_readiness(scp, 1, devip)))
1057 return errsts;
1058 alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8)
1059 + cmd[13]);
1060 /* following just in case virtual_gb changed */
1061 sdebug_capacity = get_sdebug_capacity();
1062 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
1063 capac = sdebug_capacity - 1;
1064 for (k = 0; k < 8; ++k, capac >>= 8)
1065 arr[7 - k] = capac & 0xff;
1066 arr[8] = (scsi_debug_sector_size >> 24) & 0xff;
1067 arr[9] = (scsi_debug_sector_size >> 16) & 0xff;
1068 arr[10] = (scsi_debug_sector_size >> 8) & 0xff;
1069 arr[11] = scsi_debug_sector_size & 0xff;
1070 arr[13] = scsi_debug_physblk_exp & 0xf;
1071 arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f;
1072
1073 if (scsi_debug_lbp())
1074 arr[14] |= 0x80; /* LBPME */
1075
1076 arr[15] = scsi_debug_lowest_aligned & 0xff;
1077
1078 if (scsi_debug_dif) {
1079 arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */
1080 arr[12] |= 1; /* PROT_EN */
1081 }
1082
1083 return fill_from_dev_buffer(scp, arr,
1084 min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
1085}
1086
1087#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1088
1089static int resp_report_tgtpgs(struct scsi_cmnd * scp,
1090 struct sdebug_dev_info * devip)
1091{
1092 unsigned char *cmd = (unsigned char *)scp->cmnd;
1093 unsigned char * arr;
1094 int host_no = devip->sdbg_host->shost->host_no;
1095 int n, ret, alen, rlen;
1096 int port_group_a, port_group_b, port_a, port_b;
1097
1098 alen = ((cmd[6] << 24) + (cmd[7] << 16) + (cmd[8] << 8)
1099 + cmd[9]);
1100
1101 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1102 if (! arr)
1103 return DID_REQUEUE << 16;
1104 /*
1105 * EVPD page 0x88 states we have two ports, one
1106 * real and a fake port with no device connected.
1107 * So we create two port groups with one port each
1108 * and set the group with port B to unavailable.
1109 */
1110 port_a = 0x1; /* relative port A */
1111 port_b = 0x2; /* relative port B */
1112 port_group_a = (((host_no + 1) & 0x7f) << 8) +
1113 (devip->channel & 0x7f);
1114 port_group_b = (((host_no + 1) & 0x7f) << 8) +
1115 (devip->channel & 0x7f) + 0x80;
1116
1117 /*
1118 * The asymmetric access state is cycled according to the host_id.
1119 */
1120 n = 4;
1121 if (0 == scsi_debug_vpd_use_hostno) {
1122 arr[n++] = host_no % 3; /* Asymm access state */
1123 arr[n++] = 0x0F; /* claim: all states are supported */
1124 } else {
1125 arr[n++] = 0x0; /* Active/Optimized path */
1126 arr[n++] = 0x01; /* claim: only support active/optimized paths */
1127 }
1128 arr[n++] = (port_group_a >> 8) & 0xff;
1129 arr[n++] = port_group_a & 0xff;
1130 arr[n++] = 0; /* Reserved */
1131 arr[n++] = 0; /* Status code */
1132 arr[n++] = 0; /* Vendor unique */
1133 arr[n++] = 0x1; /* One port per group */
1134 arr[n++] = 0; /* Reserved */
1135 arr[n++] = 0; /* Reserved */
1136 arr[n++] = (port_a >> 8) & 0xff;
1137 arr[n++] = port_a & 0xff;
1138 arr[n++] = 3; /* Port unavailable */
1139 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
1140 arr[n++] = (port_group_b >> 8) & 0xff;
1141 arr[n++] = port_group_b & 0xff;
1142 arr[n++] = 0; /* Reserved */
1143 arr[n++] = 0; /* Status code */
1144 arr[n++] = 0; /* Vendor unique */
1145 arr[n++] = 0x1; /* One port per group */
1146 arr[n++] = 0; /* Reserved */
1147 arr[n++] = 0; /* Reserved */
1148 arr[n++] = (port_b >> 8) & 0xff;
1149 arr[n++] = port_b & 0xff;
1150
1151 rlen = n - 4;
1152 arr[0] = (rlen >> 24) & 0xff;
1153 arr[1] = (rlen >> 16) & 0xff;
1154 arr[2] = (rlen >> 8) & 0xff;
1155 arr[3] = rlen & 0xff;
1156
1157 /*
1158 * Return the smallest value of either
1159 * - The allocated length
1160 * - The constructed command length
1161 * - The maximum array size
1162 */
1163 rlen = min(alen,n);
1164 ret = fill_from_dev_buffer(scp, arr,
1165 min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1166 kfree(arr);
1167 return ret;
1168}
1169
1170/* <<Following mode page info copied from ST318451LW>> */
1171
1172static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target)
1173{ /* Read-Write Error Recovery page for mode_sense */
1174 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
1175 5, 0, 0xff, 0xff};
1176
1177 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
1178 if (1 == pcontrol)
1179 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
1180 return sizeof(err_recov_pg);
1181}
1182
1183static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target)
1184{ /* Disconnect-Reconnect page for mode_sense */
1185 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
1186 0, 0, 0, 0, 0, 0, 0, 0};
1187
1188 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
1189 if (1 == pcontrol)
1190 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
1191 return sizeof(disconnect_pg);
1192}
1193
1194static int resp_format_pg(unsigned char * p, int pcontrol, int target)
1195{ /* Format device page for mode_sense */
1196 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
1197 0, 0, 0, 0, 0, 0, 0, 0,
1198 0, 0, 0, 0, 0x40, 0, 0, 0};
1199
1200 memcpy(p, format_pg, sizeof(format_pg));
1201 p[10] = (sdebug_sectors_per >> 8) & 0xff;
1202 p[11] = sdebug_sectors_per & 0xff;
1203 p[12] = (scsi_debug_sector_size >> 8) & 0xff;
1204 p[13] = scsi_debug_sector_size & 0xff;
1205 if (DEV_REMOVEABLE(target))
1206 p[20] |= 0x20; /* should agree with INQUIRY */
1207 if (1 == pcontrol)
1208 memset(p + 2, 0, sizeof(format_pg) - 2);
1209 return sizeof(format_pg);
1210}
1211
1212static int resp_caching_pg(unsigned char * p, int pcontrol, int target)
1213{ /* Caching page for mode_sense */
1214 unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
1215 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
1216
1217 memcpy(p, caching_pg, sizeof(caching_pg));
1218 if (1 == pcontrol)
1219 memset(p + 2, 0, sizeof(caching_pg) - 2);
1220 return sizeof(caching_pg);
1221}
1222
1223static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
1224{ /* Control mode page for mode_sense */
1225 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
1226 0, 0, 0, 0};
1227 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
1228 0, 0, 0x2, 0x4b};
1229
1230 if (scsi_debug_dsense)
1231 ctrl_m_pg[2] |= 0x4;
1232 else
1233 ctrl_m_pg[2] &= ~0x4;
1234
1235 if (scsi_debug_ato)
1236 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
1237
1238 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
1239 if (1 == pcontrol)
1240 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
1241 else if (2 == pcontrol)
1242 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
1243 return sizeof(ctrl_m_pg);
1244}
1245
1246
1247static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target)
1248{ /* Informational Exceptions control mode page for mode_sense */
1249 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
1250 0, 0, 0x0, 0x0};
1251 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1252 0, 0, 0x0, 0x0};
1253
1254 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
1255 if (1 == pcontrol)
1256 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
1257 else if (2 == pcontrol)
1258 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
1259 return sizeof(iec_m_pg);
1260}
1261
1262static int resp_sas_sf_m_pg(unsigned char * p, int pcontrol, int target)
1263{ /* SAS SSP mode page - short format for mode_sense */
1264 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
1265 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
1266
1267 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
1268 if (1 == pcontrol)
1269 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
1270 return sizeof(sas_sf_m_pg);
1271}
1272
1273
1274static int resp_sas_pcd_m_spg(unsigned char * p, int pcontrol, int target,
1275 int target_dev_id)
1276{ /* SAS phy control and discover mode page for mode_sense */
1277 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
1278 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
1279 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1280 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1281 0x2, 0, 0, 0, 0, 0, 0, 0,
1282 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1283 0, 0, 0, 0, 0, 0, 0, 0,
1284 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
1285 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1286 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1287 0x3, 0, 0, 0, 0, 0, 0, 0,
1288 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1289 0, 0, 0, 0, 0, 0, 0, 0,
1290 };
1291 int port_a, port_b;
1292
1293 port_a = target_dev_id + 1;
1294 port_b = port_a + 1;
1295 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
1296 p[20] = (port_a >> 24);
1297 p[21] = (port_a >> 16) & 0xff;
1298 p[22] = (port_a >> 8) & 0xff;
1299 p[23] = port_a & 0xff;
1300 p[48 + 20] = (port_b >> 24);
1301 p[48 + 21] = (port_b >> 16) & 0xff;
1302 p[48 + 22] = (port_b >> 8) & 0xff;
1303 p[48 + 23] = port_b & 0xff;
1304 if (1 == pcontrol)
1305 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
1306 return sizeof(sas_pcd_m_pg);
1307}
1308
1309static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol)
1310{ /* SAS SSP shared protocol specific port mode subpage */
1311 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
1312 0, 0, 0, 0, 0, 0, 0, 0,
1313 };
1314
1315 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
1316 if (1 == pcontrol)
1317 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
1318 return sizeof(sas_sha_m_pg);
1319}
1320
1321#define SDEBUG_MAX_MSENSE_SZ 256
1322
1323static int resp_mode_sense(struct scsi_cmnd * scp, int target,
1324 struct sdebug_dev_info * devip)
1325{
1326 unsigned char dbd, llbaa;
1327 int pcontrol, pcode, subpcode, bd_len;
1328 unsigned char dev_spec;
1329 int k, alloc_len, msense_6, offset, len, errsts, target_dev_id;
1330 unsigned char * ap;
1331 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
1332 unsigned char *cmd = (unsigned char *)scp->cmnd;
1333
1334 if ((errsts = check_readiness(scp, 1, devip)))
1335 return errsts;
1336 dbd = !!(cmd[1] & 0x8);
1337 pcontrol = (cmd[2] & 0xc0) >> 6;
1338 pcode = cmd[2] & 0x3f;
1339 subpcode = cmd[3];
1340 msense_6 = (MODE_SENSE == cmd[0]);
1341 llbaa = msense_6 ? 0 : !!(cmd[1] & 0x10);
1342 if ((0 == scsi_debug_ptype) && (0 == dbd))
1343 bd_len = llbaa ? 16 : 8;
1344 else
1345 bd_len = 0;
1346 alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]);
1347 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
1348 if (0x3 == pcontrol) { /* Saving values not supported */
1349 mk_sense_buffer(devip, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP,
1350 0);
1351 return check_condition_result;
1352 }
1353 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
1354 (devip->target * 1000) - 3;
1355 /* set DPOFUA bit for disks */
1356 if (0 == scsi_debug_ptype)
1357 dev_spec = (DEV_READONLY(target) ? 0x80 : 0x0) | 0x10;
1358 else
1359 dev_spec = 0x0;
1360 if (msense_6) {
1361 arr[2] = dev_spec;
1362 arr[3] = bd_len;
1363 offset = 4;
1364 } else {
1365 arr[3] = dev_spec;
1366 if (16 == bd_len)
1367 arr[4] = 0x1; /* set LONGLBA bit */
1368 arr[7] = bd_len; /* assume 255 or less */
1369 offset = 8;
1370 }
1371 ap = arr + offset;
1372 if ((bd_len > 0) && (!sdebug_capacity))
1373 sdebug_capacity = get_sdebug_capacity();
1374
1375 if (8 == bd_len) {
1376 if (sdebug_capacity > 0xfffffffe) {
1377 ap[0] = 0xff;
1378 ap[1] = 0xff;
1379 ap[2] = 0xff;
1380 ap[3] = 0xff;
1381 } else {
1382 ap[0] = (sdebug_capacity >> 24) & 0xff;
1383 ap[1] = (sdebug_capacity >> 16) & 0xff;
1384 ap[2] = (sdebug_capacity >> 8) & 0xff;
1385 ap[3] = sdebug_capacity & 0xff;
1386 }
1387 ap[6] = (scsi_debug_sector_size >> 8) & 0xff;
1388 ap[7] = scsi_debug_sector_size & 0xff;
1389 offset += bd_len;
1390 ap = arr + offset;
1391 } else if (16 == bd_len) {
1392 unsigned long long capac = sdebug_capacity;
1393
1394 for (k = 0; k < 8; ++k, capac >>= 8)
1395 ap[7 - k] = capac & 0xff;
1396 ap[12] = (scsi_debug_sector_size >> 24) & 0xff;
1397 ap[13] = (scsi_debug_sector_size >> 16) & 0xff;
1398 ap[14] = (scsi_debug_sector_size >> 8) & 0xff;
1399 ap[15] = scsi_debug_sector_size & 0xff;
1400 offset += bd_len;
1401 ap = arr + offset;
1402 }
1403
1404 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
1405 /* TODO: Control Extension page */
1406 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
1407 0);
1408 return check_condition_result;
1409 }
1410 switch (pcode) {
1411 case 0x1: /* Read-Write error recovery page, direct access */
1412 len = resp_err_recov_pg(ap, pcontrol, target);
1413 offset += len;
1414 break;
1415 case 0x2: /* Disconnect-Reconnect page, all devices */
1416 len = resp_disconnect_pg(ap, pcontrol, target);
1417 offset += len;
1418 break;
1419 case 0x3: /* Format device page, direct access */
1420 len = resp_format_pg(ap, pcontrol, target);
1421 offset += len;
1422 break;
1423 case 0x8: /* Caching page, direct access */
1424 len = resp_caching_pg(ap, pcontrol, target);
1425 offset += len;
1426 break;
1427 case 0xa: /* Control Mode page, all devices */
1428 len = resp_ctrl_m_pg(ap, pcontrol, target);
1429 offset += len;
1430 break;
1431 case 0x19: /* if spc==1 then sas phy, control+discover */
1432 if ((subpcode > 0x2) && (subpcode < 0xff)) {
1433 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1434 INVALID_FIELD_IN_CDB, 0);
1435 return check_condition_result;
1436 }
1437 len = 0;
1438 if ((0x0 == subpcode) || (0xff == subpcode))
1439 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
1440 if ((0x1 == subpcode) || (0xff == subpcode))
1441 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
1442 target_dev_id);
1443 if ((0x2 == subpcode) || (0xff == subpcode))
1444 len += resp_sas_sha_m_spg(ap + len, pcontrol);
1445 offset += len;
1446 break;
1447 case 0x1c: /* Informational Exceptions Mode page, all devices */
1448 len = resp_iec_m_pg(ap, pcontrol, target);
1449 offset += len;
1450 break;
1451 case 0x3f: /* Read all Mode pages */
1452 if ((0 == subpcode) || (0xff == subpcode)) {
1453 len = resp_err_recov_pg(ap, pcontrol, target);
1454 len += resp_disconnect_pg(ap + len, pcontrol, target);
1455 len += resp_format_pg(ap + len, pcontrol, target);
1456 len += resp_caching_pg(ap + len, pcontrol, target);
1457 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
1458 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
1459 if (0xff == subpcode) {
1460 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
1461 target, target_dev_id);
1462 len += resp_sas_sha_m_spg(ap + len, pcontrol);
1463 }
1464 len += resp_iec_m_pg(ap + len, pcontrol, target);
1465 } else {
1466 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1467 INVALID_FIELD_IN_CDB, 0);
1468 return check_condition_result;
1469 }
1470 offset += len;
1471 break;
1472 default:
1473 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
1474 0);
1475 return check_condition_result;
1476 }
1477 if (msense_6)
1478 arr[0] = offset - 1;
1479 else {
1480 arr[0] = ((offset - 2) >> 8) & 0xff;
1481 arr[1] = (offset - 2) & 0xff;
1482 }
1483 return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
1484}
1485
1486#define SDEBUG_MAX_MSELECT_SZ 512
1487
1488static int resp_mode_select(struct scsi_cmnd * scp, int mselect6,
1489 struct sdebug_dev_info * devip)
1490{
1491 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
1492 int param_len, res, errsts, mpage;
1493 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
1494 unsigned char *cmd = (unsigned char *)scp->cmnd;
1495
1496 if ((errsts = check_readiness(scp, 1, devip)))
1497 return errsts;
1498 memset(arr, 0, sizeof(arr));
1499 pf = cmd[1] & 0x10;
1500 sp = cmd[1] & 0x1;
1501 param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]);
1502 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
1503 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1504 INVALID_FIELD_IN_CDB, 0);
1505 return check_condition_result;
1506 }
1507 res = fetch_to_dev_buffer(scp, arr, param_len);
1508 if (-1 == res)
1509 return (DID_ERROR << 16);
1510 else if ((res < param_len) &&
1511 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
1512 printk(KERN_INFO "scsi_debug: mode_select: cdb indicated=%d, "
1513 " IO sent=%d bytes\n", param_len, res);
1514 md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2);
1515 bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]);
1516 if (md_len > 2) {
1517 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1518 INVALID_FIELD_IN_PARAM_LIST, 0);
1519 return check_condition_result;
1520 }
1521 off = bd_len + (mselect6 ? 4 : 8);
1522 mpage = arr[off] & 0x3f;
1523 ps = !!(arr[off] & 0x80);
1524 if (ps) {
1525 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1526 INVALID_FIELD_IN_PARAM_LIST, 0);
1527 return check_condition_result;
1528 }
1529 spf = !!(arr[off] & 0x40);
1530 pg_len = spf ? ((arr[off + 2] << 8) + arr[off + 3] + 4) :
1531 (arr[off + 1] + 2);
1532 if ((pg_len + off) > param_len) {
1533 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1534 PARAMETER_LIST_LENGTH_ERR, 0);
1535 return check_condition_result;
1536 }
1537 switch (mpage) {
1538 case 0xa: /* Control Mode page */
1539 if (ctrl_m_pg[1] == arr[off + 1]) {
1540 memcpy(ctrl_m_pg + 2, arr + off + 2,
1541 sizeof(ctrl_m_pg) - 2);
1542 scsi_debug_dsense = !!(ctrl_m_pg[2] & 0x4);
1543 return 0;
1544 }
1545 break;
1546 case 0x1c: /* Informational Exceptions Mode page */
1547 if (iec_m_pg[1] == arr[off + 1]) {
1548 memcpy(iec_m_pg + 2, arr + off + 2,
1549 sizeof(iec_m_pg) - 2);
1550 return 0;
1551 }
1552 break;
1553 default:
1554 break;
1555 }
1556 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1557 INVALID_FIELD_IN_PARAM_LIST, 0);
1558 return check_condition_result;
1559}
1560
1561static int resp_temp_l_pg(unsigned char * arr)
1562{
1563 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
1564 0x0, 0x1, 0x3, 0x2, 0x0, 65,
1565 };
1566
1567 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
1568 return sizeof(temp_l_pg);
1569}
1570
1571static int resp_ie_l_pg(unsigned char * arr)
1572{
1573 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
1574 };
1575
1576 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
1577 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
1578 arr[4] = THRESHOLD_EXCEEDED;
1579 arr[5] = 0xff;
1580 }
1581 return sizeof(ie_l_pg);
1582}
1583
1584#define SDEBUG_MAX_LSENSE_SZ 512
1585
1586static int resp_log_sense(struct scsi_cmnd * scp,
1587 struct sdebug_dev_info * devip)
1588{
1589 int ppc, sp, pcontrol, pcode, subpcode, alloc_len, errsts, len, n;
1590 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
1591 unsigned char *cmd = (unsigned char *)scp->cmnd;
1592
1593 if ((errsts = check_readiness(scp, 1, devip)))
1594 return errsts;
1595 memset(arr, 0, sizeof(arr));
1596 ppc = cmd[1] & 0x2;
1597 sp = cmd[1] & 0x1;
1598 if (ppc || sp) {
1599 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1600 INVALID_FIELD_IN_CDB, 0);
1601 return check_condition_result;
1602 }
1603 pcontrol = (cmd[2] & 0xc0) >> 6;
1604 pcode = cmd[2] & 0x3f;
1605 subpcode = cmd[3] & 0xff;
1606 alloc_len = (cmd[7] << 8) + cmd[8];
1607 arr[0] = pcode;
1608 if (0 == subpcode) {
1609 switch (pcode) {
1610 case 0x0: /* Supported log pages log page */
1611 n = 4;
1612 arr[n++] = 0x0; /* this page */
1613 arr[n++] = 0xd; /* Temperature */
1614 arr[n++] = 0x2f; /* Informational exceptions */
1615 arr[3] = n - 4;
1616 break;
1617 case 0xd: /* Temperature log page */
1618 arr[3] = resp_temp_l_pg(arr + 4);
1619 break;
1620 case 0x2f: /* Informational exceptions log page */
1621 arr[3] = resp_ie_l_pg(arr + 4);
1622 break;
1623 default:
1624 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1625 INVALID_FIELD_IN_CDB, 0);
1626 return check_condition_result;
1627 }
1628 } else if (0xff == subpcode) {
1629 arr[0] |= 0x40;
1630 arr[1] = subpcode;
1631 switch (pcode) {
1632 case 0x0: /* Supported log pages and subpages log page */
1633 n = 4;
1634 arr[n++] = 0x0;
1635 arr[n++] = 0x0; /* 0,0 page */
1636 arr[n++] = 0x0;
1637 arr[n++] = 0xff; /* this page */
1638 arr[n++] = 0xd;
1639 arr[n++] = 0x0; /* Temperature */
1640 arr[n++] = 0x2f;
1641 arr[n++] = 0x0; /* Informational exceptions */
1642 arr[3] = n - 4;
1643 break;
1644 case 0xd: /* Temperature subpages */
1645 n = 4;
1646 arr[n++] = 0xd;
1647 arr[n++] = 0x0; /* Temperature */
1648 arr[3] = n - 4;
1649 break;
1650 case 0x2f: /* Informational exceptions subpages */
1651 n = 4;
1652 arr[n++] = 0x2f;
1653 arr[n++] = 0x0; /* Informational exceptions */
1654 arr[3] = n - 4;
1655 break;
1656 default:
1657 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1658 INVALID_FIELD_IN_CDB, 0);
1659 return check_condition_result;
1660 }
1661 } else {
1662 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1663 INVALID_FIELD_IN_CDB, 0);
1664 return check_condition_result;
1665 }
1666 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
1667 return fill_from_dev_buffer(scp, arr,
1668 min(len, SDEBUG_MAX_INQ_ARR_SZ));
1669}
1670
1671static int check_device_access_params(struct sdebug_dev_info *devi,
1672 unsigned long long lba, unsigned int num)
1673{
1674 if (lba + num > sdebug_capacity) {
1675 mk_sense_buffer(devi, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE, 0);
1676 return check_condition_result;
1677 }
1678 /* transfer length excessive (tie in to block limits VPD page) */
1679 if (num > sdebug_store_sectors) {
1680 mk_sense_buffer(devi, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
1681 return check_condition_result;
1682 }
1683 return 0;
1684}
1685
1686static int do_device_access(struct scsi_cmnd *scmd,
1687 struct sdebug_dev_info *devi,
1688 unsigned long long lba, unsigned int num, int write)
1689{
1690 int ret;
1691 unsigned long long block, rest = 0;
1692 int (*func)(struct scsi_cmnd *, unsigned char *, int);
1693
1694 func = write ? fetch_to_dev_buffer : fill_from_dev_buffer;
1695
1696 block = do_div(lba, sdebug_store_sectors);
1697 if (block + num > sdebug_store_sectors)
1698 rest = block + num - sdebug_store_sectors;
1699
1700 ret = func(scmd, fake_storep + (block * scsi_debug_sector_size),
1701 (num - rest) * scsi_debug_sector_size);
1702 if (!ret && rest)
1703 ret = func(scmd, fake_storep, rest * scsi_debug_sector_size);
1704
1705 return ret;
1706}
1707
1708static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
1709 unsigned int sectors, u32 ei_lba)
1710{
1711 unsigned int i, resid;
1712 struct scatterlist *psgl;
1713 struct sd_dif_tuple *sdt;
1714 sector_t sector;
1715 sector_t tmp_sec = start_sec;
1716 void *paddr;
1717
1718 start_sec = do_div(tmp_sec, sdebug_store_sectors);
1719
1720 sdt = (struct sd_dif_tuple *)(dif_storep + dif_offset(start_sec));
1721
1722 for (i = 0 ; i < sectors ; i++) {
1723 u16 csum;
1724
1725 if (sdt[i].app_tag == 0xffff)
1726 continue;
1727
1728 sector = start_sec + i;
1729
1730 switch (scsi_debug_guard) {
1731 case 1:
1732 csum = ip_compute_csum(fake_storep +
1733 sector * scsi_debug_sector_size,
1734 scsi_debug_sector_size);
1735 break;
1736 case 0:
1737 csum = crc_t10dif(fake_storep +
1738 sector * scsi_debug_sector_size,
1739 scsi_debug_sector_size);
1740 csum = cpu_to_be16(csum);
1741 break;
1742 default:
1743 BUG();
1744 }
1745
1746 if (sdt[i].guard_tag != csum) {
1747 printk(KERN_ERR "%s: GUARD check failed on sector %lu" \
1748 " rcvd 0x%04x, data 0x%04x\n", __func__,
1749 (unsigned long)sector,
1750 be16_to_cpu(sdt[i].guard_tag),
1751 be16_to_cpu(csum));
1752 dif_errors++;
1753 return 0x01;
1754 }
1755
1756 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION &&
1757 be32_to_cpu(sdt[i].ref_tag) != (sector & 0xffffffff)) {
1758 printk(KERN_ERR "%s: REF check failed on sector %lu\n",
1759 __func__, (unsigned long)sector);
1760 dif_errors++;
1761 return 0x03;
1762 }
1763
1764 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
1765 be32_to_cpu(sdt[i].ref_tag) != ei_lba) {
1766 printk(KERN_ERR "%s: REF check failed on sector %lu\n",
1767 __func__, (unsigned long)sector);
1768 dif_errors++;
1769 return 0x03;
1770 }
1771
1772 ei_lba++;
1773 }
1774
1775 resid = sectors * 8; /* Bytes of protection data to copy into sgl */
1776 sector = start_sec;
1777
1778 scsi_for_each_prot_sg(SCpnt, psgl, scsi_prot_sg_count(SCpnt), i) {
1779 int len = min(psgl->length, resid);
1780
1781 paddr = kmap_atomic(sg_page(psgl), KM_IRQ0) + psgl->offset;
1782 memcpy(paddr, dif_storep + dif_offset(sector), len);
1783
1784 sector += len >> 3;
1785 if (sector >= sdebug_store_sectors) {
1786 /* Force wrap */
1787 tmp_sec = sector;
1788 sector = do_div(tmp_sec, sdebug_store_sectors);
1789 }
1790 resid -= len;
1791 kunmap_atomic(paddr, KM_IRQ0);
1792 }
1793
1794 dix_reads++;
1795
1796 return 0;
1797}
1798
1799static int resp_read(struct scsi_cmnd *SCpnt, unsigned long long lba,
1800 unsigned int num, struct sdebug_dev_info *devip,
1801 u32 ei_lba)
1802{
1803 unsigned long iflags;
1804 int ret;
1805
1806 ret = check_device_access_params(devip, lba, num);
1807 if (ret)
1808 return ret;
1809
1810 if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) &&
1811 (lba <= (OPT_MEDIUM_ERR_ADDR + OPT_MEDIUM_ERR_NUM - 1)) &&
1812 ((lba + num) > OPT_MEDIUM_ERR_ADDR)) {
1813 /* claim unrecoverable read error */
1814 mk_sense_buffer(devip, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
1815 /* set info field and valid bit for fixed descriptor */
1816 if (0x70 == (devip->sense_buff[0] & 0x7f)) {
1817 devip->sense_buff[0] |= 0x80; /* Valid bit */
1818 ret = (lba < OPT_MEDIUM_ERR_ADDR)
1819 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
1820 devip->sense_buff[3] = (ret >> 24) & 0xff;
1821 devip->sense_buff[4] = (ret >> 16) & 0xff;
1822 devip->sense_buff[5] = (ret >> 8) & 0xff;
1823 devip->sense_buff[6] = ret & 0xff;
1824 }
1825 scsi_set_resid(SCpnt, scsi_bufflen(SCpnt));
1826 return check_condition_result;
1827 }
1828
1829 /* DIX + T10 DIF */
1830 if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
1831 int prot_ret = prot_verify_read(SCpnt, lba, num, ei_lba);
1832
1833 if (prot_ret) {
1834 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, prot_ret);
1835 return illegal_condition_result;
1836 }
1837 }
1838
1839 read_lock_irqsave(&atomic_rw, iflags);
1840 ret = do_device_access(SCpnt, devip, lba, num, 0);
1841 read_unlock_irqrestore(&atomic_rw, iflags);
1842 return ret;
1843}
1844
1845void dump_sector(unsigned char *buf, int len)
1846{
1847 int i, j;
1848
1849 printk(KERN_ERR ">>> Sector Dump <<<\n");
1850
1851 for (i = 0 ; i < len ; i += 16) {
1852 printk(KERN_ERR "%04d: ", i);
1853
1854 for (j = 0 ; j < 16 ; j++) {
1855 unsigned char c = buf[i+j];
1856 if (c >= 0x20 && c < 0x7e)
1857 printk(" %c ", buf[i+j]);
1858 else
1859 printk("%02x ", buf[i+j]);
1860 }
1861
1862 printk("\n");
1863 }
1864}
1865
1866static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
1867 unsigned int sectors, u32 ei_lba)
1868{
1869 int i, j, ret;
1870 struct sd_dif_tuple *sdt;
1871 struct scatterlist *dsgl = scsi_sglist(SCpnt);
1872 struct scatterlist *psgl = scsi_prot_sglist(SCpnt);
1873 void *daddr, *paddr;
1874 sector_t tmp_sec = start_sec;
1875 sector_t sector;
1876 int ppage_offset;
1877 unsigned short csum;
1878
1879 sector = do_div(tmp_sec, sdebug_store_sectors);
1880
1881 BUG_ON(scsi_sg_count(SCpnt) == 0);
1882 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
1883
1884 paddr = kmap_atomic(sg_page(psgl), KM_IRQ1) + psgl->offset;
1885 ppage_offset = 0;
1886
1887 /* For each data page */
1888 scsi_for_each_sg(SCpnt, dsgl, scsi_sg_count(SCpnt), i) {
1889 daddr = kmap_atomic(sg_page(dsgl), KM_IRQ0) + dsgl->offset;
1890
1891 /* For each sector-sized chunk in data page */
1892 for (j = 0 ; j < dsgl->length ; j += scsi_debug_sector_size) {
1893
1894 /* If we're at the end of the current
1895 * protection page advance to the next one
1896 */
1897 if (ppage_offset >= psgl->length) {
1898 kunmap_atomic(paddr, KM_IRQ1);
1899 psgl = sg_next(psgl);
1900 BUG_ON(psgl == NULL);
1901 paddr = kmap_atomic(sg_page(psgl), KM_IRQ1)
1902 + psgl->offset;
1903 ppage_offset = 0;
1904 }
1905
1906 sdt = paddr + ppage_offset;
1907
1908 switch (scsi_debug_guard) {
1909 case 1:
1910 csum = ip_compute_csum(daddr,
1911 scsi_debug_sector_size);
1912 break;
1913 case 0:
1914 csum = cpu_to_be16(crc_t10dif(daddr,
1915 scsi_debug_sector_size));
1916 break;
1917 default:
1918 BUG();
1919 ret = 0;
1920 goto out;
1921 }
1922
1923 if (sdt->guard_tag != csum) {
1924 printk(KERN_ERR
1925 "%s: GUARD check failed on sector %lu " \
1926 "rcvd 0x%04x, calculated 0x%04x\n",
1927 __func__, (unsigned long)sector,
1928 be16_to_cpu(sdt->guard_tag),
1929 be16_to_cpu(csum));
1930 ret = 0x01;
1931 dump_sector(daddr, scsi_debug_sector_size);
1932 goto out;
1933 }
1934
1935 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION &&
1936 be32_to_cpu(sdt->ref_tag)
1937 != (start_sec & 0xffffffff)) {
1938 printk(KERN_ERR
1939 "%s: REF check failed on sector %lu\n",
1940 __func__, (unsigned long)sector);
1941 ret = 0x03;
1942 dump_sector(daddr, scsi_debug_sector_size);
1943 goto out;
1944 }
1945
1946 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
1947 be32_to_cpu(sdt->ref_tag) != ei_lba) {
1948 printk(KERN_ERR
1949 "%s: REF check failed on sector %lu\n",
1950 __func__, (unsigned long)sector);
1951 ret = 0x03;
1952 dump_sector(daddr, scsi_debug_sector_size);
1953 goto out;
1954 }
1955
1956 /* Would be great to copy this in bigger
1957 * chunks. However, for the sake of
1958 * correctness we need to verify each sector
1959 * before writing it to "stable" storage
1960 */
1961 memcpy(dif_storep + dif_offset(sector), sdt, 8);
1962
1963 sector++;
1964
1965 if (sector == sdebug_store_sectors)
1966 sector = 0; /* Force wrap */
1967
1968 start_sec++;
1969 ei_lba++;
1970 daddr += scsi_debug_sector_size;
1971 ppage_offset += sizeof(struct sd_dif_tuple);
1972 }
1973
1974 kunmap_atomic(daddr, KM_IRQ0);
1975 }
1976
1977 kunmap_atomic(paddr, KM_IRQ1);
1978
1979 dix_writes++;
1980
1981 return 0;
1982
1983out:
1984 dif_errors++;
1985 kunmap_atomic(daddr, KM_IRQ0);
1986 kunmap_atomic(paddr, KM_IRQ1);
1987 return ret;
1988}
1989
1990static unsigned int map_state(sector_t lba, unsigned int *num)
1991{
1992 unsigned int granularity, alignment, mapped;
1993 sector_t block, next, end;
1994
1995 granularity = scsi_debug_unmap_granularity;
1996 alignment = granularity - scsi_debug_unmap_alignment;
1997 block = lba + alignment;
1998 do_div(block, granularity);
1999
2000 mapped = test_bit(block, map_storep);
2001
2002 if (mapped)
2003 next = find_next_zero_bit(map_storep, map_size, block);
2004 else
2005 next = find_next_bit(map_storep, map_size, block);
2006
2007 end = next * granularity - scsi_debug_unmap_alignment;
2008 *num = end - lba;
2009
2010 return mapped;
2011}
2012
2013static void map_region(sector_t lba, unsigned int len)
2014{
2015 unsigned int granularity, alignment;
2016 sector_t end = lba + len;
2017
2018 granularity = scsi_debug_unmap_granularity;
2019 alignment = granularity - scsi_debug_unmap_alignment;
2020
2021 while (lba < end) {
2022 sector_t block, rem;
2023
2024 block = lba + alignment;
2025 rem = do_div(block, granularity);
2026
2027 if (block < map_size)
2028 set_bit(block, map_storep);
2029
2030 lba += granularity - rem;
2031 }
2032}
2033
2034static void unmap_region(sector_t lba, unsigned int len)
2035{
2036 unsigned int granularity, alignment;
2037 sector_t end = lba + len;
2038
2039 granularity = scsi_debug_unmap_granularity;
2040 alignment = granularity - scsi_debug_unmap_alignment;
2041
2042 while (lba < end) {
2043 sector_t block, rem;
2044
2045 block = lba + alignment;
2046 rem = do_div(block, granularity);
2047
2048 if (rem == 0 && lba + granularity <= end &&
2049 block < map_size)
2050 clear_bit(block, map_storep);
2051
2052 lba += granularity - rem;
2053 }
2054}
2055
2056static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba,
2057 unsigned int num, struct sdebug_dev_info *devip,
2058 u32 ei_lba)
2059{
2060 unsigned long iflags;
2061 int ret;
2062
2063 ret = check_device_access_params(devip, lba, num);
2064 if (ret)
2065 return ret;
2066
2067 /* DIX + T10 DIF */
2068 if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
2069 int prot_ret = prot_verify_write(SCpnt, lba, num, ei_lba);
2070
2071 if (prot_ret) {
2072 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, prot_ret);
2073 return illegal_condition_result;
2074 }
2075 }
2076
2077 write_lock_irqsave(&atomic_rw, iflags);
2078 ret = do_device_access(SCpnt, devip, lba, num, 1);
2079 if (scsi_debug_unmap_granularity)
2080 map_region(lba, num);
2081 write_unlock_irqrestore(&atomic_rw, iflags);
2082 if (-1 == ret)
2083 return (DID_ERROR << 16);
2084 else if ((ret < (num * scsi_debug_sector_size)) &&
2085 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2086 printk(KERN_INFO "scsi_debug: write: cdb indicated=%u, "
2087 " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret);
2088
2089 return 0;
2090}
2091
2092static int resp_write_same(struct scsi_cmnd *scmd, unsigned long long lba,
2093 unsigned int num, struct sdebug_dev_info *devip,
2094 u32 ei_lba, unsigned int unmap)
2095{
2096 unsigned long iflags;
2097 unsigned long long i;
2098 int ret;
2099
2100 ret = check_device_access_params(devip, lba, num);
2101 if (ret)
2102 return ret;
2103
2104 if (num > scsi_debug_write_same_length) {
2105 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
2106 0);
2107 return check_condition_result;
2108 }
2109
2110 write_lock_irqsave(&atomic_rw, iflags);
2111
2112 if (unmap && scsi_debug_unmap_granularity) {
2113 unmap_region(lba, num);
2114 goto out;
2115 }
2116
2117 /* Else fetch one logical block */
2118 ret = fetch_to_dev_buffer(scmd,
2119 fake_storep + (lba * scsi_debug_sector_size),
2120 scsi_debug_sector_size);
2121
2122 if (-1 == ret) {
2123 write_unlock_irqrestore(&atomic_rw, iflags);
2124 return (DID_ERROR << 16);
2125 } else if ((ret < (num * scsi_debug_sector_size)) &&
2126 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2127 printk(KERN_INFO "scsi_debug: write same: cdb indicated=%u, "
2128 " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret);
2129
2130 /* Copy first sector to remaining blocks */
2131 for (i = 1 ; i < num ; i++)
2132 memcpy(fake_storep + ((lba + i) * scsi_debug_sector_size),
2133 fake_storep + (lba * scsi_debug_sector_size),
2134 scsi_debug_sector_size);
2135
2136 if (scsi_debug_unmap_granularity)
2137 map_region(lba, num);
2138out:
2139 write_unlock_irqrestore(&atomic_rw, iflags);
2140
2141 return 0;
2142}
2143
2144struct unmap_block_desc {
2145 __be64 lba;
2146 __be32 blocks;
2147 __be32 __reserved;
2148};
2149
2150static int resp_unmap(struct scsi_cmnd * scmd, struct sdebug_dev_info * devip)
2151{
2152 unsigned char *buf;
2153 struct unmap_block_desc *desc;
2154 unsigned int i, payload_len, descriptors;
2155 int ret;
2156
2157 ret = check_readiness(scmd, 1, devip);
2158 if (ret)
2159 return ret;
2160
2161 payload_len = get_unaligned_be16(&scmd->cmnd[7]);
2162 BUG_ON(scsi_bufflen(scmd) != payload_len);
2163
2164 descriptors = (payload_len - 8) / 16;
2165
2166 buf = kmalloc(scsi_bufflen(scmd), GFP_ATOMIC);
2167 if (!buf)
2168 return check_condition_result;
2169
2170 scsi_sg_copy_to_buffer(scmd, buf, scsi_bufflen(scmd));
2171
2172 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
2173 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
2174
2175 desc = (void *)&buf[8];
2176
2177 for (i = 0 ; i < descriptors ; i++) {
2178 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
2179 unsigned int num = get_unaligned_be32(&desc[i].blocks);
2180
2181 ret = check_device_access_params(devip, lba, num);
2182 if (ret)
2183 goto out;
2184
2185 unmap_region(lba, num);
2186 }
2187
2188 ret = 0;
2189
2190out:
2191 kfree(buf);
2192
2193 return ret;
2194}
2195
2196#define SDEBUG_GET_LBA_STATUS_LEN 32
2197
2198static int resp_get_lba_status(struct scsi_cmnd * scmd,
2199 struct sdebug_dev_info * devip)
2200{
2201 unsigned long long lba;
2202 unsigned int alloc_len, mapped, num;
2203 unsigned char arr[SDEBUG_GET_LBA_STATUS_LEN];
2204 int ret;
2205
2206 ret = check_readiness(scmd, 1, devip);
2207 if (ret)
2208 return ret;
2209
2210 lba = get_unaligned_be64(&scmd->cmnd[2]);
2211 alloc_len = get_unaligned_be32(&scmd->cmnd[10]);
2212
2213 if (alloc_len < 24)
2214 return 0;
2215
2216 ret = check_device_access_params(devip, lba, 1);
2217 if (ret)
2218 return ret;
2219
2220 mapped = map_state(lba, &num);
2221
2222 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
2223 put_unaligned_be32(16, &arr[0]); /* Parameter Data Length */
2224 put_unaligned_be64(lba, &arr[8]); /* LBA */
2225 put_unaligned_be32(num, &arr[16]); /* Number of blocks */
2226 arr[20] = !mapped; /* mapped = 0, unmapped = 1 */
2227
2228 return fill_from_dev_buffer(scmd, arr, SDEBUG_GET_LBA_STATUS_LEN);
2229}
2230
2231#define SDEBUG_RLUN_ARR_SZ 256
2232
2233static int resp_report_luns(struct scsi_cmnd * scp,
2234 struct sdebug_dev_info * devip)
2235{
2236 unsigned int alloc_len;
2237 int lun_cnt, i, upper, num, n, wlun, lun;
2238 unsigned char *cmd = (unsigned char *)scp->cmnd;
2239 int select_report = (int)cmd[2];
2240 struct scsi_lun *one_lun;
2241 unsigned char arr[SDEBUG_RLUN_ARR_SZ];
2242 unsigned char * max_addr;
2243
2244 alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
2245 if ((alloc_len < 4) || (select_report > 2)) {
2246 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
2247 0);
2248 return check_condition_result;
2249 }
2250 /* can produce response with up to 16k luns (lun 0 to lun 16383) */
2251 memset(arr, 0, SDEBUG_RLUN_ARR_SZ);
2252 lun_cnt = scsi_debug_max_luns;
2253 if (1 == select_report)
2254 lun_cnt = 0;
2255 else if (scsi_debug_no_lun_0 && (lun_cnt > 0))
2256 --lun_cnt;
2257 wlun = (select_report > 0) ? 1 : 0;
2258 num = lun_cnt + wlun;
2259 arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff;
2260 arr[3] = (sizeof(struct scsi_lun) * num) & 0xff;
2261 n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) /
2262 sizeof(struct scsi_lun)), num);
2263 if (n < num) {
2264 wlun = 0;
2265 lun_cnt = n;
2266 }
2267 one_lun = (struct scsi_lun *) &arr[8];
2268 max_addr = arr + SDEBUG_RLUN_ARR_SZ;
2269 for (i = 0, lun = (scsi_debug_no_lun_0 ? 1 : 0);
2270 ((i < lun_cnt) && ((unsigned char *)(one_lun + i) < max_addr));
2271 i++, lun++) {
2272 upper = (lun >> 8) & 0x3f;
2273 if (upper)
2274 one_lun[i].scsi_lun[0] =
2275 (upper | (SAM2_LUN_ADDRESS_METHOD << 6));
2276 one_lun[i].scsi_lun[1] = lun & 0xff;
2277 }
2278 if (wlun) {
2279 one_lun[i].scsi_lun[0] = (SAM2_WLUN_REPORT_LUNS >> 8) & 0xff;
2280 one_lun[i].scsi_lun[1] = SAM2_WLUN_REPORT_LUNS & 0xff;
2281 i++;
2282 }
2283 alloc_len = (unsigned char *)(one_lun + i) - arr;
2284 return fill_from_dev_buffer(scp, arr,
2285 min((int)alloc_len, SDEBUG_RLUN_ARR_SZ));
2286}
2287
2288static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
2289 unsigned int num, struct sdebug_dev_info *devip)
2290{
2291 int i, j, ret = -1;
2292 unsigned char *kaddr, *buf;
2293 unsigned int offset;
2294 struct scatterlist *sg;
2295 struct scsi_data_buffer *sdb = scsi_in(scp);
2296
2297 /* better not to use temporary buffer. */
2298 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
2299 if (!buf)
2300 return ret;
2301
2302 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
2303
2304 offset = 0;
2305 for_each_sg(sdb->table.sgl, sg, sdb->table.nents, i) {
2306 kaddr = (unsigned char *)kmap_atomic(sg_page(sg), KM_USER0);
2307 if (!kaddr)
2308 goto out;
2309
2310 for (j = 0; j < sg->length; j++)
2311 *(kaddr + sg->offset + j) ^= *(buf + offset + j);
2312
2313 offset += sg->length;
2314 kunmap_atomic(kaddr, KM_USER0);
2315 }
2316 ret = 0;
2317out:
2318 kfree(buf);
2319
2320 return ret;
2321}
2322
2323/* When timer goes off this function is called. */
2324static void timer_intr_handler(unsigned long indx)
2325{
2326 struct sdebug_queued_cmd * sqcp;
2327 unsigned long iflags;
2328
2329 if (indx >= scsi_debug_max_queue) {
2330 printk(KERN_ERR "scsi_debug:timer_intr_handler: indx too "
2331 "large\n");
2332 return;
2333 }
2334 spin_lock_irqsave(&queued_arr_lock, iflags);
2335 sqcp = &queued_arr[(int)indx];
2336 if (! sqcp->in_use) {
2337 printk(KERN_ERR "scsi_debug:timer_intr_handler: Unexpected "
2338 "interrupt\n");
2339 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2340 return;
2341 }
2342 sqcp->in_use = 0;
2343 if (sqcp->done_funct) {
2344 sqcp->a_cmnd->result = sqcp->scsi_result;
2345 sqcp->done_funct(sqcp->a_cmnd); /* callback to mid level */
2346 }
2347 sqcp->done_funct = NULL;
2348 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2349}
2350
2351
2352static struct sdebug_dev_info *
2353sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags)
2354{
2355 struct sdebug_dev_info *devip;
2356
2357 devip = kzalloc(sizeof(*devip), flags);
2358 if (devip) {
2359 devip->sdbg_host = sdbg_host;
2360 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
2361 }
2362 return devip;
2363}
2364
2365static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev)
2366{
2367 struct sdebug_host_info * sdbg_host;
2368 struct sdebug_dev_info * open_devip = NULL;
2369 struct sdebug_dev_info * devip =
2370 (struct sdebug_dev_info *)sdev->hostdata;
2371
2372 if (devip)
2373 return devip;
2374 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
2375 if (!sdbg_host) {
2376 printk(KERN_ERR "Host info NULL\n");
2377 return NULL;
2378 }
2379 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
2380 if ((devip->used) && (devip->channel == sdev->channel) &&
2381 (devip->target == sdev->id) &&
2382 (devip->lun == sdev->lun))
2383 return devip;
2384 else {
2385 if ((!devip->used) && (!open_devip))
2386 open_devip = devip;
2387 }
2388 }
2389 if (!open_devip) { /* try and make a new one */
2390 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
2391 if (!open_devip) {
2392 printk(KERN_ERR "%s: out of memory at line %d\n",
2393 __func__, __LINE__);
2394 return NULL;
2395 }
2396 }
2397
2398 open_devip->channel = sdev->channel;
2399 open_devip->target = sdev->id;
2400 open_devip->lun = sdev->lun;
2401 open_devip->sdbg_host = sdbg_host;
2402 open_devip->reset = 1;
2403 open_devip->used = 1;
2404 memset(open_devip->sense_buff, 0, SDEBUG_SENSE_LEN);
2405 if (scsi_debug_dsense)
2406 open_devip->sense_buff[0] = 0x72;
2407 else {
2408 open_devip->sense_buff[0] = 0x70;
2409 open_devip->sense_buff[7] = 0xa;
2410 }
2411 if (sdev->lun == SAM2_WLUN_REPORT_LUNS)
2412 open_devip->wlun = SAM2_WLUN_REPORT_LUNS & 0xff;
2413
2414 return open_devip;
2415}
2416
2417static int scsi_debug_slave_alloc(struct scsi_device *sdp)
2418{
2419 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2420 printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %u>\n",
2421 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
2422 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue);
2423 return 0;
2424}
2425
2426static int scsi_debug_slave_configure(struct scsi_device *sdp)
2427{
2428 struct sdebug_dev_info *devip;
2429
2430 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2431 printk(KERN_INFO "scsi_debug: slave_configure <%u %u %u %u>\n",
2432 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
2433 if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN)
2434 sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN;
2435 devip = devInfoReg(sdp);
2436 if (NULL == devip)
2437 return 1; /* no resources, will be marked offline */
2438 sdp->hostdata = devip;
2439 if (sdp->host->cmd_per_lun)
2440 scsi_adjust_queue_depth(sdp, SDEBUG_TAGGED_QUEUING,
2441 sdp->host->cmd_per_lun);
2442 blk_queue_max_segment_size(sdp->request_queue, 256 * 1024);
2443 if (scsi_debug_no_uld)
2444 sdp->no_uld_attach = 1;
2445 return 0;
2446}
2447
2448static void scsi_debug_slave_destroy(struct scsi_device *sdp)
2449{
2450 struct sdebug_dev_info *devip =
2451 (struct sdebug_dev_info *)sdp->hostdata;
2452
2453 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2454 printk(KERN_INFO "scsi_debug: slave_destroy <%u %u %u %u>\n",
2455 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
2456 if (devip) {
2457 /* make this slot available for re-use */
2458 devip->used = 0;
2459 sdp->hostdata = NULL;
2460 }
2461}
2462
2463/* Returns 1 if found 'cmnd' and deleted its timer. else returns 0 */
2464static int stop_queued_cmnd(struct scsi_cmnd *cmnd)
2465{
2466 unsigned long iflags;
2467 int k;
2468 struct sdebug_queued_cmd *sqcp;
2469
2470 spin_lock_irqsave(&queued_arr_lock, iflags);
2471 for (k = 0; k < scsi_debug_max_queue; ++k) {
2472 sqcp = &queued_arr[k];
2473 if (sqcp->in_use && (cmnd == sqcp->a_cmnd)) {
2474 del_timer_sync(&sqcp->cmnd_timer);
2475 sqcp->in_use = 0;
2476 sqcp->a_cmnd = NULL;
2477 break;
2478 }
2479 }
2480 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2481 return (k < scsi_debug_max_queue) ? 1 : 0;
2482}
2483
2484/* Deletes (stops) timers of all queued commands */
2485static void stop_all_queued(void)
2486{
2487 unsigned long iflags;
2488 int k;
2489 struct sdebug_queued_cmd *sqcp;
2490
2491 spin_lock_irqsave(&queued_arr_lock, iflags);
2492 for (k = 0; k < scsi_debug_max_queue; ++k) {
2493 sqcp = &queued_arr[k];
2494 if (sqcp->in_use && sqcp->a_cmnd) {
2495 del_timer_sync(&sqcp->cmnd_timer);
2496 sqcp->in_use = 0;
2497 sqcp->a_cmnd = NULL;
2498 }
2499 }
2500 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2501}
2502
2503static int scsi_debug_abort(struct scsi_cmnd * SCpnt)
2504{
2505 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2506 printk(KERN_INFO "scsi_debug: abort\n");
2507 ++num_aborts;
2508 stop_queued_cmnd(SCpnt);
2509 return SUCCESS;
2510}
2511
2512static int scsi_debug_biosparam(struct scsi_device *sdev,
2513 struct block_device * bdev, sector_t capacity, int *info)
2514{
2515 int res;
2516 unsigned char *buf;
2517
2518 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2519 printk(KERN_INFO "scsi_debug: biosparam\n");
2520 buf = scsi_bios_ptable(bdev);
2521 if (buf) {
2522 res = scsi_partsize(buf, capacity,
2523 &info[2], &info[0], &info[1]);
2524 kfree(buf);
2525 if (! res)
2526 return res;
2527 }
2528 info[0] = sdebug_heads;
2529 info[1] = sdebug_sectors_per;
2530 info[2] = sdebug_cylinders_per;
2531 return 0;
2532}
2533
2534static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
2535{
2536 struct sdebug_dev_info * devip;
2537
2538 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2539 printk(KERN_INFO "scsi_debug: device_reset\n");
2540 ++num_dev_resets;
2541 if (SCpnt) {
2542 devip = devInfoReg(SCpnt->device);
2543 if (devip)
2544 devip->reset = 1;
2545 }
2546 return SUCCESS;
2547}
2548
2549static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
2550{
2551 struct sdebug_host_info *sdbg_host;
2552 struct sdebug_dev_info * dev_info;
2553 struct scsi_device * sdp;
2554 struct Scsi_Host * hp;
2555
2556 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2557 printk(KERN_INFO "scsi_debug: bus_reset\n");
2558 ++num_bus_resets;
2559 if (SCpnt && ((sdp = SCpnt->device)) && ((hp = sdp->host))) {
2560 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
2561 if (sdbg_host) {
2562 list_for_each_entry(dev_info,
2563 &sdbg_host->dev_info_list,
2564 dev_list)
2565 dev_info->reset = 1;
2566 }
2567 }
2568 return SUCCESS;
2569}
2570
2571static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
2572{
2573 struct sdebug_host_info * sdbg_host;
2574 struct sdebug_dev_info * dev_info;
2575
2576 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2577 printk(KERN_INFO "scsi_debug: host_reset\n");
2578 ++num_host_resets;
2579 spin_lock(&sdebug_host_list_lock);
2580 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
2581 list_for_each_entry(dev_info, &sdbg_host->dev_info_list,
2582 dev_list)
2583 dev_info->reset = 1;
2584 }
2585 spin_unlock(&sdebug_host_list_lock);
2586 stop_all_queued();
2587 return SUCCESS;
2588}
2589
2590/* Initializes timers in queued array */
2591static void __init init_all_queued(void)
2592{
2593 unsigned long iflags;
2594 int k;
2595 struct sdebug_queued_cmd * sqcp;
2596
2597 spin_lock_irqsave(&queued_arr_lock, iflags);
2598 for (k = 0; k < scsi_debug_max_queue; ++k) {
2599 sqcp = &queued_arr[k];
2600 init_timer(&sqcp->cmnd_timer);
2601 sqcp->in_use = 0;
2602 sqcp->a_cmnd = NULL;
2603 }
2604 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2605}
2606
2607static void __init sdebug_build_parts(unsigned char *ramp,
2608 unsigned long store_size)
2609{
2610 struct partition * pp;
2611 int starts[SDEBUG_MAX_PARTS + 2];
2612 int sectors_per_part, num_sectors, k;
2613 int heads_by_sects, start_sec, end_sec;
2614
2615 /* assume partition table already zeroed */
2616 if ((scsi_debug_num_parts < 1) || (store_size < 1048576))
2617 return;
2618 if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) {
2619 scsi_debug_num_parts = SDEBUG_MAX_PARTS;
2620 printk(KERN_WARNING "scsi_debug:build_parts: reducing "
2621 "partitions to %d\n", SDEBUG_MAX_PARTS);
2622 }
2623 num_sectors = (int)sdebug_store_sectors;
2624 sectors_per_part = (num_sectors - sdebug_sectors_per)
2625 / scsi_debug_num_parts;
2626 heads_by_sects = sdebug_heads * sdebug_sectors_per;
2627 starts[0] = sdebug_sectors_per;
2628 for (k = 1; k < scsi_debug_num_parts; ++k)
2629 starts[k] = ((k * sectors_per_part) / heads_by_sects)
2630 * heads_by_sects;
2631 starts[scsi_debug_num_parts] = num_sectors;
2632 starts[scsi_debug_num_parts + 1] = 0;
2633
2634 ramp[510] = 0x55; /* magic partition markings */
2635 ramp[511] = 0xAA;
2636 pp = (struct partition *)(ramp + 0x1be);
2637 for (k = 0; starts[k + 1]; ++k, ++pp) {
2638 start_sec = starts[k];
2639 end_sec = starts[k + 1] - 1;
2640 pp->boot_ind = 0;
2641
2642 pp->cyl = start_sec / heads_by_sects;
2643 pp->head = (start_sec - (pp->cyl * heads_by_sects))
2644 / sdebug_sectors_per;
2645 pp->sector = (start_sec % sdebug_sectors_per) + 1;
2646
2647 pp->end_cyl = end_sec / heads_by_sects;
2648 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
2649 / sdebug_sectors_per;
2650 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
2651
2652 pp->start_sect = start_sec;
2653 pp->nr_sects = end_sec - start_sec + 1;
2654 pp->sys_ind = 0x83; /* plain Linux partition */
2655 }
2656}
2657
2658static int schedule_resp(struct scsi_cmnd * cmnd,
2659 struct sdebug_dev_info * devip,
2660 done_funct_t done, int scsi_result, int delta_jiff)
2661{
2662 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmnd) {
2663 if (scsi_result) {
2664 struct scsi_device * sdp = cmnd->device;
2665
2666 printk(KERN_INFO "scsi_debug: <%u %u %u %u> "
2667 "non-zero result=0x%x\n", sdp->host->host_no,
2668 sdp->channel, sdp->id, sdp->lun, scsi_result);
2669 }
2670 }
2671 if (cmnd && devip) {
2672 /* simulate autosense by this driver */
2673 if (SAM_STAT_CHECK_CONDITION == (scsi_result & 0xff))
2674 memcpy(cmnd->sense_buffer, devip->sense_buff,
2675 (SCSI_SENSE_BUFFERSIZE > SDEBUG_SENSE_LEN) ?
2676 SDEBUG_SENSE_LEN : SCSI_SENSE_BUFFERSIZE);
2677 }
2678 if (delta_jiff <= 0) {
2679 if (cmnd)
2680 cmnd->result = scsi_result;
2681 if (done)
2682 done(cmnd);
2683 return 0;
2684 } else {
2685 unsigned long iflags;
2686 int k;
2687 struct sdebug_queued_cmd * sqcp = NULL;
2688
2689 spin_lock_irqsave(&queued_arr_lock, iflags);
2690 for (k = 0; k < scsi_debug_max_queue; ++k) {
2691 sqcp = &queued_arr[k];
2692 if (! sqcp->in_use)
2693 break;
2694 }
2695 if (k >= scsi_debug_max_queue) {
2696 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2697 printk(KERN_WARNING "scsi_debug: can_queue exceeded\n");
2698 return 1; /* report busy to mid level */
2699 }
2700 sqcp->in_use = 1;
2701 sqcp->a_cmnd = cmnd;
2702 sqcp->scsi_result = scsi_result;
2703 sqcp->done_funct = done;
2704 sqcp->cmnd_timer.function = timer_intr_handler;
2705 sqcp->cmnd_timer.data = k;
2706 sqcp->cmnd_timer.expires = jiffies + delta_jiff;
2707 add_timer(&sqcp->cmnd_timer);
2708 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2709 if (cmnd)
2710 cmnd->result = 0;
2711 return 0;
2712 }
2713}
2714/* Note: The following macros create attribute files in the
2715 /sys/module/scsi_debug/parameters directory. Unfortunately this
2716 driver is unaware of a change and cannot trigger auxiliary actions
2717 as it can when the corresponding attribute in the
2718 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
2719 */
2720module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR);
2721module_param_named(ato, scsi_debug_ato, int, S_IRUGO);
2722module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR);
2723module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO);
2724module_param_named(dif, scsi_debug_dif, int, S_IRUGO);
2725module_param_named(dix, scsi_debug_dix, int, S_IRUGO);
2726module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR);
2727module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR);
2728module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR);
2729module_param_named(guard, scsi_debug_guard, int, S_IRUGO);
2730module_param_named(lbpu, scsi_debug_lbpu, int, S_IRUGO);
2731module_param_named(lbpws, scsi_debug_lbpws, int, S_IRUGO);
2732module_param_named(lbpws10, scsi_debug_lbpws10, int, S_IRUGO);
2733module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO);
2734module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR);
2735module_param_named(max_queue, scsi_debug_max_queue, int, S_IRUGO | S_IWUSR);
2736module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR);
2737module_param_named(no_uld, scsi_debug_no_uld, int, S_IRUGO);
2738module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO);
2739module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR);
2740module_param_named(opt_blks, scsi_debug_opt_blks, int, S_IRUGO);
2741module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR);
2742module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO);
2743module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR);
2744module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO);
2745module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO);
2746module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO);
2747module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO);
2748module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO);
2749module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, int, S_IRUGO);
2750module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR);
2751module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int,
2752 S_IRUGO | S_IWUSR);
2753module_param_named(write_same_length, scsi_debug_write_same_length, int,
2754 S_IRUGO | S_IWUSR);
2755
2756MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
2757MODULE_DESCRIPTION("SCSI debug adapter driver");
2758MODULE_LICENSE("GPL");
2759MODULE_VERSION(SCSI_DEBUG_VERSION);
2760
2761MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
2762MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
2763MODULE_PARM_DESC(delay, "# of jiffies to delay response(def=1)");
2764MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs(def=8)");
2765MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
2766MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
2767MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
2768MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
2769MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
2770MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
2771MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
2772MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
2773MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
2774MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
2775MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
2776MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to 255(def))");
2777MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
2778MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
2779MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
2780MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
2781MODULE_PARM_DESC(opt_blks, "optimal transfer length in block (def=64)");
2782MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
2783MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
2784MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
2785MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])");
2786MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
2787MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
2788MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
2789MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
2790MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
2791MODULE_PARM_DESC(virtual_gb, "virtual gigabyte size (def=0 -> use dev_size_mb)");
2792MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
2793MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
2794
2795static char sdebug_info[256];
2796
2797static const char * scsi_debug_info(struct Scsi_Host * shp)
2798{
2799 sprintf(sdebug_info, "scsi_debug, version %s [%s], "
2800 "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION,
2801 scsi_debug_version_date, scsi_debug_dev_size_mb,
2802 scsi_debug_opts);
2803 return sdebug_info;
2804}
2805
2806/* scsi_debug_proc_info
2807 * Used if the driver currently has no own support for /proc/scsi
2808 */
2809static int scsi_debug_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset,
2810 int length, int inout)
2811{
2812 int len, pos, begin;
2813 int orig_length;
2814
2815 orig_length = length;
2816
2817 if (inout == 1) {
2818 char arr[16];
2819 int minLen = length > 15 ? 15 : length;
2820
2821 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
2822 return -EACCES;
2823 memcpy(arr, buffer, minLen);
2824 arr[minLen] = '\0';
2825 if (1 != sscanf(arr, "%d", &pos))
2826 return -EINVAL;
2827 scsi_debug_opts = pos;
2828 if (scsi_debug_every_nth != 0)
2829 scsi_debug_cmnd_count = 0;
2830 return length;
2831 }
2832 begin = 0;
2833 pos = len = sprintf(buffer, "scsi_debug adapter driver, version "
2834 "%s [%s]\n"
2835 "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, "
2836 "every_nth=%d(curr:%d)\n"
2837 "delay=%d, max_luns=%d, scsi_level=%d\n"
2838 "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n"
2839 "number of aborts=%d, device_reset=%d, bus_resets=%d, "
2840 "host_resets=%d\ndix_reads=%d dix_writes=%d dif_errors=%d\n",
2841 SCSI_DEBUG_VERSION, scsi_debug_version_date, scsi_debug_num_tgts,
2842 scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth,
2843 scsi_debug_cmnd_count, scsi_debug_delay,
2844 scsi_debug_max_luns, scsi_debug_scsi_level,
2845 scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads,
2846 sdebug_sectors_per, num_aborts, num_dev_resets, num_bus_resets,
2847 num_host_resets, dix_reads, dix_writes, dif_errors);
2848 if (pos < offset) {
2849 len = 0;
2850 begin = pos;
2851 }
2852 *start = buffer + (offset - begin); /* Start of wanted data */
2853 len -= (offset - begin);
2854 if (len > length)
2855 len = length;
2856 return len;
2857}
2858
2859static ssize_t sdebug_delay_show(struct device_driver * ddp, char * buf)
2860{
2861 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay);
2862}
2863
2864static ssize_t sdebug_delay_store(struct device_driver * ddp,
2865 const char * buf, size_t count)
2866{
2867 int delay;
2868 char work[20];
2869
2870 if (1 == sscanf(buf, "%10s", work)) {
2871 if ((1 == sscanf(work, "%d", &delay)) && (delay >= 0)) {
2872 scsi_debug_delay = delay;
2873 return count;
2874 }
2875 }
2876 return -EINVAL;
2877}
2878DRIVER_ATTR(delay, S_IRUGO | S_IWUSR, sdebug_delay_show,
2879 sdebug_delay_store);
2880
2881static ssize_t sdebug_opts_show(struct device_driver * ddp, char * buf)
2882{
2883 return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts);
2884}
2885
2886static ssize_t sdebug_opts_store(struct device_driver * ddp,
2887 const char * buf, size_t count)
2888{
2889 int opts;
2890 char work[20];
2891
2892 if (1 == sscanf(buf, "%10s", work)) {
2893 if (0 == strnicmp(work,"0x", 2)) {
2894 if (1 == sscanf(&work[2], "%x", &opts))
2895 goto opts_done;
2896 } else {
2897 if (1 == sscanf(work, "%d", &opts))
2898 goto opts_done;
2899 }
2900 }
2901 return -EINVAL;
2902opts_done:
2903 scsi_debug_opts = opts;
2904 scsi_debug_cmnd_count = 0;
2905 return count;
2906}
2907DRIVER_ATTR(opts, S_IRUGO | S_IWUSR, sdebug_opts_show,
2908 sdebug_opts_store);
2909
2910static ssize_t sdebug_ptype_show(struct device_driver * ddp, char * buf)
2911{
2912 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype);
2913}
2914static ssize_t sdebug_ptype_store(struct device_driver * ddp,
2915 const char * buf, size_t count)
2916{
2917 int n;
2918
2919 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2920 scsi_debug_ptype = n;
2921 return count;
2922 }
2923 return -EINVAL;
2924}
2925DRIVER_ATTR(ptype, S_IRUGO | S_IWUSR, sdebug_ptype_show, sdebug_ptype_store);
2926
2927static ssize_t sdebug_dsense_show(struct device_driver * ddp, char * buf)
2928{
2929 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense);
2930}
2931static ssize_t sdebug_dsense_store(struct device_driver * ddp,
2932 const char * buf, size_t count)
2933{
2934 int n;
2935
2936 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2937 scsi_debug_dsense = n;
2938 return count;
2939 }
2940 return -EINVAL;
2941}
2942DRIVER_ATTR(dsense, S_IRUGO | S_IWUSR, sdebug_dsense_show,
2943 sdebug_dsense_store);
2944
2945static ssize_t sdebug_fake_rw_show(struct device_driver * ddp, char * buf)
2946{
2947 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw);
2948}
2949static ssize_t sdebug_fake_rw_store(struct device_driver * ddp,
2950 const char * buf, size_t count)
2951{
2952 int n;
2953
2954 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2955 scsi_debug_fake_rw = n;
2956 return count;
2957 }
2958 return -EINVAL;
2959}
2960DRIVER_ATTR(fake_rw, S_IRUGO | S_IWUSR, sdebug_fake_rw_show,
2961 sdebug_fake_rw_store);
2962
2963static ssize_t sdebug_no_lun_0_show(struct device_driver * ddp, char * buf)
2964{
2965 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0);
2966}
2967static ssize_t sdebug_no_lun_0_store(struct device_driver * ddp,
2968 const char * buf, size_t count)
2969{
2970 int n;
2971
2972 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2973 scsi_debug_no_lun_0 = n;
2974 return count;
2975 }
2976 return -EINVAL;
2977}
2978DRIVER_ATTR(no_lun_0, S_IRUGO | S_IWUSR, sdebug_no_lun_0_show,
2979 sdebug_no_lun_0_store);
2980
2981static ssize_t sdebug_num_tgts_show(struct device_driver * ddp, char * buf)
2982{
2983 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts);
2984}
2985static ssize_t sdebug_num_tgts_store(struct device_driver * ddp,
2986 const char * buf, size_t count)
2987{
2988 int n;
2989
2990 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2991 scsi_debug_num_tgts = n;
2992 sdebug_max_tgts_luns();
2993 return count;
2994 }
2995 return -EINVAL;
2996}
2997DRIVER_ATTR(num_tgts, S_IRUGO | S_IWUSR, sdebug_num_tgts_show,
2998 sdebug_num_tgts_store);
2999
3000static ssize_t sdebug_dev_size_mb_show(struct device_driver * ddp, char * buf)
3001{
3002 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb);
3003}
3004DRIVER_ATTR(dev_size_mb, S_IRUGO, sdebug_dev_size_mb_show, NULL);
3005
3006static ssize_t sdebug_num_parts_show(struct device_driver * ddp, char * buf)
3007{
3008 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts);
3009}
3010DRIVER_ATTR(num_parts, S_IRUGO, sdebug_num_parts_show, NULL);
3011
3012static ssize_t sdebug_every_nth_show(struct device_driver * ddp, char * buf)
3013{
3014 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth);
3015}
3016static ssize_t sdebug_every_nth_store(struct device_driver * ddp,
3017 const char * buf, size_t count)
3018{
3019 int nth;
3020
3021 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
3022 scsi_debug_every_nth = nth;
3023 scsi_debug_cmnd_count = 0;
3024 return count;
3025 }
3026 return -EINVAL;
3027}
3028DRIVER_ATTR(every_nth, S_IRUGO | S_IWUSR, sdebug_every_nth_show,
3029 sdebug_every_nth_store);
3030
3031static ssize_t sdebug_max_luns_show(struct device_driver * ddp, char * buf)
3032{
3033 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns);
3034}
3035static ssize_t sdebug_max_luns_store(struct device_driver * ddp,
3036 const char * buf, size_t count)
3037{
3038 int n;
3039
3040 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3041 scsi_debug_max_luns = n;
3042 sdebug_max_tgts_luns();
3043 return count;
3044 }
3045 return -EINVAL;
3046}
3047DRIVER_ATTR(max_luns, S_IRUGO | S_IWUSR, sdebug_max_luns_show,
3048 sdebug_max_luns_store);
3049
3050static ssize_t sdebug_max_queue_show(struct device_driver * ddp, char * buf)
3051{
3052 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_queue);
3053}
3054static ssize_t sdebug_max_queue_store(struct device_driver * ddp,
3055 const char * buf, size_t count)
3056{
3057 int n;
3058
3059 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
3060 (n <= SCSI_DEBUG_CANQUEUE)) {
3061 scsi_debug_max_queue = n;
3062 return count;
3063 }
3064 return -EINVAL;
3065}
3066DRIVER_ATTR(max_queue, S_IRUGO | S_IWUSR, sdebug_max_queue_show,
3067 sdebug_max_queue_store);
3068
3069static ssize_t sdebug_no_uld_show(struct device_driver * ddp, char * buf)
3070{
3071 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_uld);
3072}
3073DRIVER_ATTR(no_uld, S_IRUGO, sdebug_no_uld_show, NULL);
3074
3075static ssize_t sdebug_scsi_level_show(struct device_driver * ddp, char * buf)
3076{
3077 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level);
3078}
3079DRIVER_ATTR(scsi_level, S_IRUGO, sdebug_scsi_level_show, NULL);
3080
3081static ssize_t sdebug_virtual_gb_show(struct device_driver * ddp, char * buf)
3082{
3083 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb);
3084}
3085static ssize_t sdebug_virtual_gb_store(struct device_driver * ddp,
3086 const char * buf, size_t count)
3087{
3088 int n;
3089
3090 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3091 scsi_debug_virtual_gb = n;
3092
3093 sdebug_capacity = get_sdebug_capacity();
3094
3095 return count;
3096 }
3097 return -EINVAL;
3098}
3099DRIVER_ATTR(virtual_gb, S_IRUGO | S_IWUSR, sdebug_virtual_gb_show,
3100 sdebug_virtual_gb_store);
3101
3102static ssize_t sdebug_add_host_show(struct device_driver * ddp, char * buf)
3103{
3104 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host);
3105}
3106
3107static ssize_t sdebug_add_host_store(struct device_driver * ddp,
3108 const char * buf, size_t count)
3109{
3110 int delta_hosts;
3111
3112 if (sscanf(buf, "%d", &delta_hosts) != 1)
3113 return -EINVAL;
3114 if (delta_hosts > 0) {
3115 do {
3116 sdebug_add_adapter();
3117 } while (--delta_hosts);
3118 } else if (delta_hosts < 0) {
3119 do {
3120 sdebug_remove_adapter();
3121 } while (++delta_hosts);
3122 }
3123 return count;
3124}
3125DRIVER_ATTR(add_host, S_IRUGO | S_IWUSR, sdebug_add_host_show,
3126 sdebug_add_host_store);
3127
3128static ssize_t sdebug_vpd_use_hostno_show(struct device_driver * ddp,
3129 char * buf)
3130{
3131 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_vpd_use_hostno);
3132}
3133static ssize_t sdebug_vpd_use_hostno_store(struct device_driver * ddp,
3134 const char * buf, size_t count)
3135{
3136 int n;
3137
3138 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3139 scsi_debug_vpd_use_hostno = n;
3140 return count;
3141 }
3142 return -EINVAL;
3143}
3144DRIVER_ATTR(vpd_use_hostno, S_IRUGO | S_IWUSR, sdebug_vpd_use_hostno_show,
3145 sdebug_vpd_use_hostno_store);
3146
3147static ssize_t sdebug_sector_size_show(struct device_driver * ddp, char * buf)
3148{
3149 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size);
3150}
3151DRIVER_ATTR(sector_size, S_IRUGO, sdebug_sector_size_show, NULL);
3152
3153static ssize_t sdebug_dix_show(struct device_driver *ddp, char *buf)
3154{
3155 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix);
3156}
3157DRIVER_ATTR(dix, S_IRUGO, sdebug_dix_show, NULL);
3158
3159static ssize_t sdebug_dif_show(struct device_driver *ddp, char *buf)
3160{
3161 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif);
3162}
3163DRIVER_ATTR(dif, S_IRUGO, sdebug_dif_show, NULL);
3164
3165static ssize_t sdebug_guard_show(struct device_driver *ddp, char *buf)
3166{
3167 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_guard);
3168}
3169DRIVER_ATTR(guard, S_IRUGO, sdebug_guard_show, NULL);
3170
3171static ssize_t sdebug_ato_show(struct device_driver *ddp, char *buf)
3172{
3173 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato);
3174}
3175DRIVER_ATTR(ato, S_IRUGO, sdebug_ato_show, NULL);
3176
3177static ssize_t sdebug_map_show(struct device_driver *ddp, char *buf)
3178{
3179 ssize_t count;
3180
3181 if (!scsi_debug_lbp())
3182 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
3183 sdebug_store_sectors);
3184
3185 count = bitmap_scnlistprintf(buf, PAGE_SIZE, map_storep, map_size);
3186
3187 buf[count++] = '\n';
3188 buf[count++] = 0;
3189
3190 return count;
3191}
3192DRIVER_ATTR(map, S_IRUGO, sdebug_map_show, NULL);
3193
3194
3195/* Note: The following function creates attribute files in the
3196 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
3197 files (over those found in the /sys/module/scsi_debug/parameters
3198 directory) is that auxiliary actions can be triggered when an attribute
3199 is changed. For example see: sdebug_add_host_store() above.
3200 */
3201static int do_create_driverfs_files(void)
3202{
3203 int ret;
3204
3205 ret = driver_create_file(&sdebug_driverfs_driver, &driver_attr_add_host);
3206 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_delay);
3207 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb);
3208 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dsense);
3209 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_every_nth);
3210 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_fake_rw);
3211 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_luns);
3212 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_queue);
3213 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_no_lun_0);
3214 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_no_uld);
3215 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_parts);
3216 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_tgts);
3217 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ptype);
3218 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_opts);
3219 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_scsi_level);
3220 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb);
3221 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno);
3222 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_sector_size);
3223 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dix);
3224 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dif);
3225 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_guard);
3226 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ato);
3227 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_map);
3228 return ret;
3229}
3230
3231static void do_remove_driverfs_files(void)
3232{
3233 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_map);
3234 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ato);
3235 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_guard);
3236 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dif);
3237 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dix);
3238 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_sector_size);
3239 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno);
3240 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb);
3241 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_scsi_level);
3242 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_opts);
3243 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ptype);
3244 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_tgts);
3245 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_parts);
3246 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_no_uld);
3247 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_no_lun_0);
3248 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_queue);
3249 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_luns);
3250 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_fake_rw);
3251 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_every_nth);
3252 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dsense);
3253 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb);
3254 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_delay);
3255 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_add_host);
3256}
3257
3258struct device *pseudo_primary;
3259
3260static int __init scsi_debug_init(void)
3261{
3262 unsigned long sz;
3263 int host_to_add;
3264 int k;
3265 int ret;
3266
3267 switch (scsi_debug_sector_size) {
3268 case 512:
3269 case 1024:
3270 case 2048:
3271 case 4096:
3272 break;
3273 default:
3274 printk(KERN_ERR "scsi_debug_init: invalid sector_size %d\n",
3275 scsi_debug_sector_size);
3276 return -EINVAL;
3277 }
3278
3279 switch (scsi_debug_dif) {
3280
3281 case SD_DIF_TYPE0_PROTECTION:
3282 case SD_DIF_TYPE1_PROTECTION:
3283 case SD_DIF_TYPE2_PROTECTION:
3284 case SD_DIF_TYPE3_PROTECTION:
3285 break;
3286
3287 default:
3288 printk(KERN_ERR "scsi_debug_init: dif must be 0, 1, 2 or 3\n");
3289 return -EINVAL;
3290 }
3291
3292 if (scsi_debug_guard > 1) {
3293 printk(KERN_ERR "scsi_debug_init: guard must be 0 or 1\n");
3294 return -EINVAL;
3295 }
3296
3297 if (scsi_debug_ato > 1) {
3298 printk(KERN_ERR "scsi_debug_init: ato must be 0 or 1\n");
3299 return -EINVAL;
3300 }
3301
3302 if (scsi_debug_physblk_exp > 15) {
3303 printk(KERN_ERR "scsi_debug_init: invalid physblk_exp %u\n",
3304 scsi_debug_physblk_exp);
3305 return -EINVAL;
3306 }
3307
3308 if (scsi_debug_lowest_aligned > 0x3fff) {
3309 printk(KERN_ERR "scsi_debug_init: lowest_aligned too big: %u\n",
3310 scsi_debug_lowest_aligned);
3311 return -EINVAL;
3312 }
3313
3314 if (scsi_debug_dev_size_mb < 1)
3315 scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
3316 sz = (unsigned long)scsi_debug_dev_size_mb * 1048576;
3317 sdebug_store_sectors = sz / scsi_debug_sector_size;
3318 sdebug_capacity = get_sdebug_capacity();
3319
3320 /* play around with geometry, don't waste too much on track 0 */
3321 sdebug_heads = 8;
3322 sdebug_sectors_per = 32;
3323 if (scsi_debug_dev_size_mb >= 16)
3324 sdebug_heads = 32;
3325 else if (scsi_debug_dev_size_mb >= 256)
3326 sdebug_heads = 64;
3327 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
3328 (sdebug_sectors_per * sdebug_heads);
3329 if (sdebug_cylinders_per >= 1024) {
3330 /* other LLDs do this; implies >= 1GB ram disk ... */
3331 sdebug_heads = 255;
3332 sdebug_sectors_per = 63;
3333 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
3334 (sdebug_sectors_per * sdebug_heads);
3335 }
3336
3337 fake_storep = vmalloc(sz);
3338 if (NULL == fake_storep) {
3339 printk(KERN_ERR "scsi_debug_init: out of memory, 1\n");
3340 return -ENOMEM;
3341 }
3342 memset(fake_storep, 0, sz);
3343 if (scsi_debug_num_parts > 0)
3344 sdebug_build_parts(fake_storep, sz);
3345
3346 if (scsi_debug_dif) {
3347 int dif_size;
3348
3349 dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple);
3350 dif_storep = vmalloc(dif_size);
3351
3352 printk(KERN_ERR "scsi_debug_init: dif_storep %u bytes @ %p\n",
3353 dif_size, dif_storep);
3354
3355 if (dif_storep == NULL) {
3356 printk(KERN_ERR "scsi_debug_init: out of mem. (DIX)\n");
3357 ret = -ENOMEM;
3358 goto free_vm;
3359 }
3360
3361 memset(dif_storep, 0xff, dif_size);
3362 }
3363
3364 /* Logical Block Provisioning */
3365 if (scsi_debug_lbp()) {
3366 unsigned int map_bytes;
3367
3368 scsi_debug_unmap_max_blocks =
3369 clamp(scsi_debug_unmap_max_blocks, 0U, 0xffffffffU);
3370
3371 scsi_debug_unmap_max_desc =
3372 clamp(scsi_debug_unmap_max_desc, 0U, 256U);
3373
3374 scsi_debug_unmap_granularity =
3375 clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU);
3376
3377 if (scsi_debug_unmap_alignment &&
3378 scsi_debug_unmap_granularity < scsi_debug_unmap_alignment) {
3379 printk(KERN_ERR
3380 "%s: ERR: unmap_granularity < unmap_alignment\n",
3381 __func__);
3382 return -EINVAL;
3383 }
3384
3385 map_size = (sdebug_store_sectors / scsi_debug_unmap_granularity);
3386 map_bytes = map_size >> 3;
3387 map_storep = vmalloc(map_bytes);
3388
3389 printk(KERN_INFO "scsi_debug_init: %lu provisioning blocks\n",
3390 map_size);
3391
3392 if (map_storep == NULL) {
3393 printk(KERN_ERR "scsi_debug_init: out of mem. (MAP)\n");
3394 ret = -ENOMEM;
3395 goto free_vm;
3396 }
3397
3398 memset(map_storep, 0x0, map_bytes);
3399
3400 /* Map first 1KB for partition table */
3401 if (scsi_debug_num_parts)
3402 map_region(0, 2);
3403 }
3404
3405 pseudo_primary = root_device_register("pseudo_0");
3406 if (IS_ERR(pseudo_primary)) {
3407 printk(KERN_WARNING "scsi_debug: root_device_register() error\n");
3408 ret = PTR_ERR(pseudo_primary);
3409 goto free_vm;
3410 }
3411 ret = bus_register(&pseudo_lld_bus);
3412 if (ret < 0) {
3413 printk(KERN_WARNING "scsi_debug: bus_register error: %d\n",
3414 ret);
3415 goto dev_unreg;
3416 }
3417 ret = driver_register(&sdebug_driverfs_driver);
3418 if (ret < 0) {
3419 printk(KERN_WARNING "scsi_debug: driver_register error: %d\n",
3420 ret);
3421 goto bus_unreg;
3422 }
3423 ret = do_create_driverfs_files();
3424 if (ret < 0) {
3425 printk(KERN_WARNING "scsi_debug: driver_create_file error: %d\n",
3426 ret);
3427 goto del_files;
3428 }
3429
3430 init_all_queued();
3431
3432 host_to_add = scsi_debug_add_host;
3433 scsi_debug_add_host = 0;
3434
3435 for (k = 0; k < host_to_add; k++) {
3436 if (sdebug_add_adapter()) {
3437 printk(KERN_ERR "scsi_debug_init: "
3438 "sdebug_add_adapter failed k=%d\n", k);
3439 break;
3440 }
3441 }
3442
3443 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
3444 printk(KERN_INFO "scsi_debug_init: built %d host(s)\n",
3445 scsi_debug_add_host);
3446 }
3447 return 0;
3448
3449del_files:
3450 do_remove_driverfs_files();
3451 driver_unregister(&sdebug_driverfs_driver);
3452bus_unreg:
3453 bus_unregister(&pseudo_lld_bus);
3454dev_unreg:
3455 root_device_unregister(pseudo_primary);
3456free_vm:
3457 if (map_storep)
3458 vfree(map_storep);
3459 if (dif_storep)
3460 vfree(dif_storep);
3461 vfree(fake_storep);
3462
3463 return ret;
3464}
3465
3466static void __exit scsi_debug_exit(void)
3467{
3468 int k = scsi_debug_add_host;
3469
3470 stop_all_queued();
3471 for (; k; k--)
3472 sdebug_remove_adapter();
3473 do_remove_driverfs_files();
3474 driver_unregister(&sdebug_driverfs_driver);
3475 bus_unregister(&pseudo_lld_bus);
3476 root_device_unregister(pseudo_primary);
3477
3478 if (dif_storep)
3479 vfree(dif_storep);
3480
3481 vfree(fake_storep);
3482}
3483
3484device_initcall(scsi_debug_init);
3485module_exit(scsi_debug_exit);
3486
3487static void sdebug_release_adapter(struct device * dev)
3488{
3489 struct sdebug_host_info *sdbg_host;
3490
3491 sdbg_host = to_sdebug_host(dev);
3492 kfree(sdbg_host);
3493}
3494
3495static int sdebug_add_adapter(void)
3496{
3497 int k, devs_per_host;
3498 int error = 0;
3499 struct sdebug_host_info *sdbg_host;
3500 struct sdebug_dev_info *sdbg_devinfo, *tmp;
3501
3502 sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL);
3503 if (NULL == sdbg_host) {
3504 printk(KERN_ERR "%s: out of memory at line %d\n",
3505 __func__, __LINE__);
3506 return -ENOMEM;
3507 }
3508
3509 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
3510
3511 devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns;
3512 for (k = 0; k < devs_per_host; k++) {
3513 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
3514 if (!sdbg_devinfo) {
3515 printk(KERN_ERR "%s: out of memory at line %d\n",
3516 __func__, __LINE__);
3517 error = -ENOMEM;
3518 goto clean;
3519 }
3520 }
3521
3522 spin_lock(&sdebug_host_list_lock);
3523 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
3524 spin_unlock(&sdebug_host_list_lock);
3525
3526 sdbg_host->dev.bus = &pseudo_lld_bus;
3527 sdbg_host->dev.parent = pseudo_primary;
3528 sdbg_host->dev.release = &sdebug_release_adapter;
3529 dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host);
3530
3531 error = device_register(&sdbg_host->dev);
3532
3533 if (error)
3534 goto clean;
3535
3536 ++scsi_debug_add_host;
3537 return error;
3538
3539clean:
3540 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
3541 dev_list) {
3542 list_del(&sdbg_devinfo->dev_list);
3543 kfree(sdbg_devinfo);
3544 }
3545
3546 kfree(sdbg_host);
3547 return error;
3548}
3549
3550static void sdebug_remove_adapter(void)
3551{
3552 struct sdebug_host_info * sdbg_host = NULL;
3553
3554 spin_lock(&sdebug_host_list_lock);
3555 if (!list_empty(&sdebug_host_list)) {
3556 sdbg_host = list_entry(sdebug_host_list.prev,
3557 struct sdebug_host_info, host_list);
3558 list_del(&sdbg_host->host_list);
3559 }
3560 spin_unlock(&sdebug_host_list_lock);
3561
3562 if (!sdbg_host)
3563 return;
3564
3565 device_unregister(&sdbg_host->dev);
3566 --scsi_debug_add_host;
3567}
3568
3569static
3570int scsi_debug_queuecommand_lck(struct scsi_cmnd *SCpnt, done_funct_t done)
3571{
3572 unsigned char *cmd = (unsigned char *) SCpnt->cmnd;
3573 int len, k;
3574 unsigned int num;
3575 unsigned long long lba;
3576 u32 ei_lba;
3577 int errsts = 0;
3578 int target = SCpnt->device->id;
3579 struct sdebug_dev_info *devip = NULL;
3580 int inj_recovered = 0;
3581 int inj_transport = 0;
3582 int inj_dif = 0;
3583 int inj_dix = 0;
3584 int delay_override = 0;
3585 int unmap = 0;
3586
3587 scsi_set_resid(SCpnt, 0);
3588 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmd) {
3589 printk(KERN_INFO "scsi_debug: cmd ");
3590 for (k = 0, len = SCpnt->cmd_len; k < len; ++k)
3591 printk("%02x ", (int)cmd[k]);
3592 printk("\n");
3593 }
3594
3595 if (target == SCpnt->device->host->hostt->this_id) {
3596 printk(KERN_INFO "scsi_debug: initiator's id used as "
3597 "target!\n");
3598 return schedule_resp(SCpnt, NULL, done,
3599 DID_NO_CONNECT << 16, 0);
3600 }
3601
3602 if ((SCpnt->device->lun >= scsi_debug_max_luns) &&
3603 (SCpnt->device->lun != SAM2_WLUN_REPORT_LUNS))
3604 return schedule_resp(SCpnt, NULL, done,
3605 DID_NO_CONNECT << 16, 0);
3606 devip = devInfoReg(SCpnt->device);
3607 if (NULL == devip)
3608 return schedule_resp(SCpnt, NULL, done,
3609 DID_NO_CONNECT << 16, 0);
3610
3611 if ((scsi_debug_every_nth != 0) &&
3612 (++scsi_debug_cmnd_count >= abs(scsi_debug_every_nth))) {
3613 scsi_debug_cmnd_count = 0;
3614 if (scsi_debug_every_nth < -1)
3615 scsi_debug_every_nth = -1;
3616 if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts)
3617 return 0; /* ignore command causing timeout */
3618 else if (SCSI_DEBUG_OPT_RECOVERED_ERR & scsi_debug_opts)
3619 inj_recovered = 1; /* to reads and writes below */
3620 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & scsi_debug_opts)
3621 inj_transport = 1; /* to reads and writes below */
3622 else if (SCSI_DEBUG_OPT_DIF_ERR & scsi_debug_opts)
3623 inj_dif = 1; /* to reads and writes below */
3624 else if (SCSI_DEBUG_OPT_DIX_ERR & scsi_debug_opts)
3625 inj_dix = 1; /* to reads and writes below */
3626 }
3627
3628 if (devip->wlun) {
3629 switch (*cmd) {
3630 case INQUIRY:
3631 case REQUEST_SENSE:
3632 case TEST_UNIT_READY:
3633 case REPORT_LUNS:
3634 break; /* only allowable wlun commands */
3635 default:
3636 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3637 printk(KERN_INFO "scsi_debug: Opcode: 0x%x "
3638 "not supported for wlun\n", *cmd);
3639 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3640 INVALID_OPCODE, 0);
3641 errsts = check_condition_result;
3642 return schedule_resp(SCpnt, devip, done, errsts,
3643 0);
3644 }
3645 }
3646
3647 switch (*cmd) {
3648 case INQUIRY: /* mandatory, ignore unit attention */
3649 delay_override = 1;
3650 errsts = resp_inquiry(SCpnt, target, devip);
3651 break;
3652 case REQUEST_SENSE: /* mandatory, ignore unit attention */
3653 delay_override = 1;
3654 errsts = resp_requests(SCpnt, devip);
3655 break;
3656 case REZERO_UNIT: /* actually this is REWIND for SSC */
3657 case START_STOP:
3658 errsts = resp_start_stop(SCpnt, devip);
3659 break;
3660 case ALLOW_MEDIUM_REMOVAL:
3661 errsts = check_readiness(SCpnt, 1, devip);
3662 if (errsts)
3663 break;
3664 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3665 printk(KERN_INFO "scsi_debug: Medium removal %s\n",
3666 cmd[4] ? "inhibited" : "enabled");
3667 break;
3668 case SEND_DIAGNOSTIC: /* mandatory */
3669 errsts = check_readiness(SCpnt, 1, devip);
3670 break;
3671 case TEST_UNIT_READY: /* mandatory */
3672 delay_override = 1;
3673 errsts = check_readiness(SCpnt, 0, devip);
3674 break;
3675 case RESERVE:
3676 errsts = check_readiness(SCpnt, 1, devip);
3677 break;
3678 case RESERVE_10:
3679 errsts = check_readiness(SCpnt, 1, devip);
3680 break;
3681 case RELEASE:
3682 errsts = check_readiness(SCpnt, 1, devip);
3683 break;
3684 case RELEASE_10:
3685 errsts = check_readiness(SCpnt, 1, devip);
3686 break;
3687 case READ_CAPACITY:
3688 errsts = resp_readcap(SCpnt, devip);
3689 break;
3690 case SERVICE_ACTION_IN:
3691 if (cmd[1] == SAI_READ_CAPACITY_16)
3692 errsts = resp_readcap16(SCpnt, devip);
3693 else if (cmd[1] == SAI_GET_LBA_STATUS) {
3694
3695 if (scsi_debug_lbp() == 0) {
3696 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3697 INVALID_COMMAND_OPCODE, 0);
3698 errsts = check_condition_result;
3699 } else
3700 errsts = resp_get_lba_status(SCpnt, devip);
3701 } else {
3702 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3703 INVALID_OPCODE, 0);
3704 errsts = check_condition_result;
3705 }
3706 break;
3707 case MAINTENANCE_IN:
3708 if (MI_REPORT_TARGET_PGS != cmd[1]) {
3709 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3710 INVALID_OPCODE, 0);
3711 errsts = check_condition_result;
3712 break;
3713 }
3714 errsts = resp_report_tgtpgs(SCpnt, devip);
3715 break;
3716 case READ_16:
3717 case READ_12:
3718 case READ_10:
3719 /* READ{10,12,16} and DIF Type 2 are natural enemies */
3720 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
3721 cmd[1] & 0xe0) {
3722 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3723 INVALID_COMMAND_OPCODE, 0);
3724 errsts = check_condition_result;
3725 break;
3726 }
3727
3728 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
3729 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
3730 (cmd[1] & 0xe0) == 0)
3731 printk(KERN_ERR "Unprotected RD/WR to DIF device\n");
3732
3733 /* fall through */
3734 case READ_6:
3735read:
3736 errsts = check_readiness(SCpnt, 0, devip);
3737 if (errsts)
3738 break;
3739 if (scsi_debug_fake_rw)
3740 break;
3741 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3742 errsts = resp_read(SCpnt, lba, num, devip, ei_lba);
3743 if (inj_recovered && (0 == errsts)) {
3744 mk_sense_buffer(devip, RECOVERED_ERROR,
3745 THRESHOLD_EXCEEDED, 0);
3746 errsts = check_condition_result;
3747 } else if (inj_transport && (0 == errsts)) {
3748 mk_sense_buffer(devip, ABORTED_COMMAND,
3749 TRANSPORT_PROBLEM, ACK_NAK_TO);
3750 errsts = check_condition_result;
3751 } else if (inj_dif && (0 == errsts)) {
3752 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1);
3753 errsts = illegal_condition_result;
3754 } else if (inj_dix && (0 == errsts)) {
3755 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1);
3756 errsts = illegal_condition_result;
3757 }
3758 break;
3759 case REPORT_LUNS: /* mandatory, ignore unit attention */
3760 delay_override = 1;
3761 errsts = resp_report_luns(SCpnt, devip);
3762 break;
3763 case VERIFY: /* 10 byte SBC-2 command */
3764 errsts = check_readiness(SCpnt, 0, devip);
3765 break;
3766 case WRITE_16:
3767 case WRITE_12:
3768 case WRITE_10:
3769 /* WRITE{10,12,16} and DIF Type 2 are natural enemies */
3770 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
3771 cmd[1] & 0xe0) {
3772 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3773 INVALID_COMMAND_OPCODE, 0);
3774 errsts = check_condition_result;
3775 break;
3776 }
3777
3778 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
3779 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
3780 (cmd[1] & 0xe0) == 0)
3781 printk(KERN_ERR "Unprotected RD/WR to DIF device\n");
3782
3783 /* fall through */
3784 case WRITE_6:
3785write:
3786 errsts = check_readiness(SCpnt, 0, devip);
3787 if (errsts)
3788 break;
3789 if (scsi_debug_fake_rw)
3790 break;
3791 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3792 errsts = resp_write(SCpnt, lba, num, devip, ei_lba);
3793 if (inj_recovered && (0 == errsts)) {
3794 mk_sense_buffer(devip, RECOVERED_ERROR,
3795 THRESHOLD_EXCEEDED, 0);
3796 errsts = check_condition_result;
3797 } else if (inj_dif && (0 == errsts)) {
3798 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1);
3799 errsts = illegal_condition_result;
3800 } else if (inj_dix && (0 == errsts)) {
3801 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1);
3802 errsts = illegal_condition_result;
3803 }
3804 break;
3805 case WRITE_SAME_16:
3806 case WRITE_SAME:
3807 if (cmd[1] & 0x8) {
3808 if ((*cmd == WRITE_SAME_16 && scsi_debug_lbpws == 0) ||
3809 (*cmd == WRITE_SAME && scsi_debug_lbpws10 == 0)) {
3810 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3811 INVALID_FIELD_IN_CDB, 0);
3812 errsts = check_condition_result;
3813 } else
3814 unmap = 1;
3815 }
3816 if (errsts)
3817 break;
3818 errsts = check_readiness(SCpnt, 0, devip);
3819 if (errsts)
3820 break;
3821 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3822 errsts = resp_write_same(SCpnt, lba, num, devip, ei_lba, unmap);
3823 break;
3824 case UNMAP:
3825 errsts = check_readiness(SCpnt, 0, devip);
3826 if (errsts)
3827 break;
3828
3829 if (scsi_debug_unmap_max_desc == 0 || scsi_debug_lbpu == 0) {
3830 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3831 INVALID_COMMAND_OPCODE, 0);
3832 errsts = check_condition_result;
3833 } else
3834 errsts = resp_unmap(SCpnt, devip);
3835 break;
3836 case MODE_SENSE:
3837 case MODE_SENSE_10:
3838 errsts = resp_mode_sense(SCpnt, target, devip);
3839 break;
3840 case MODE_SELECT:
3841 errsts = resp_mode_select(SCpnt, 1, devip);
3842 break;
3843 case MODE_SELECT_10:
3844 errsts = resp_mode_select(SCpnt, 0, devip);
3845 break;
3846 case LOG_SENSE:
3847 errsts = resp_log_sense(SCpnt, devip);
3848 break;
3849 case SYNCHRONIZE_CACHE:
3850 delay_override = 1;
3851 errsts = check_readiness(SCpnt, 0, devip);
3852 break;
3853 case WRITE_BUFFER:
3854 errsts = check_readiness(SCpnt, 1, devip);
3855 break;
3856 case XDWRITEREAD_10:
3857 if (!scsi_bidi_cmnd(SCpnt)) {
3858 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3859 INVALID_FIELD_IN_CDB, 0);
3860 errsts = check_condition_result;
3861 break;
3862 }
3863
3864 errsts = check_readiness(SCpnt, 0, devip);
3865 if (errsts)
3866 break;
3867 if (scsi_debug_fake_rw)
3868 break;
3869 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3870 errsts = resp_read(SCpnt, lba, num, devip, ei_lba);
3871 if (errsts)
3872 break;
3873 errsts = resp_write(SCpnt, lba, num, devip, ei_lba);
3874 if (errsts)
3875 break;
3876 errsts = resp_xdwriteread(SCpnt, lba, num, devip);
3877 break;
3878 case VARIABLE_LENGTH_CMD:
3879 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION) {
3880
3881 if ((cmd[10] & 0xe0) == 0)
3882 printk(KERN_ERR
3883 "Unprotected RD/WR to DIF device\n");
3884
3885 if (cmd[9] == READ_32) {
3886 BUG_ON(SCpnt->cmd_len < 32);
3887 goto read;
3888 }
3889
3890 if (cmd[9] == WRITE_32) {
3891 BUG_ON(SCpnt->cmd_len < 32);
3892 goto write;
3893 }
3894 }
3895
3896 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3897 INVALID_FIELD_IN_CDB, 0);
3898 errsts = check_condition_result;
3899 break;
3900
3901 default:
3902 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3903 printk(KERN_INFO "scsi_debug: Opcode: 0x%x not "
3904 "supported\n", *cmd);
3905 errsts = check_readiness(SCpnt, 1, devip);
3906 if (errsts)
3907 break; /* Unit attention takes precedence */
3908 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
3909 errsts = check_condition_result;
3910 break;
3911 }
3912 return schedule_resp(SCpnt, devip, done, errsts,
3913 (delay_override ? 0 : scsi_debug_delay));
3914}
3915
3916static DEF_SCSI_QCMD(scsi_debug_queuecommand)
3917
3918static struct scsi_host_template sdebug_driver_template = {
3919 .proc_info = scsi_debug_proc_info,
3920 .proc_name = sdebug_proc_name,
3921 .name = "SCSI DEBUG",
3922 .info = scsi_debug_info,
3923 .slave_alloc = scsi_debug_slave_alloc,
3924 .slave_configure = scsi_debug_slave_configure,
3925 .slave_destroy = scsi_debug_slave_destroy,
3926 .ioctl = scsi_debug_ioctl,
3927 .queuecommand = scsi_debug_queuecommand,
3928 .eh_abort_handler = scsi_debug_abort,
3929 .eh_bus_reset_handler = scsi_debug_bus_reset,
3930 .eh_device_reset_handler = scsi_debug_device_reset,
3931 .eh_host_reset_handler = scsi_debug_host_reset,
3932 .bios_param = scsi_debug_biosparam,
3933 .can_queue = SCSI_DEBUG_CANQUEUE,
3934 .this_id = 7,
3935 .sg_tablesize = 256,
3936 .cmd_per_lun = 16,
3937 .max_sectors = 0xffff,
3938 .use_clustering = DISABLE_CLUSTERING,
3939 .module = THIS_MODULE,
3940};
3941
3942static int sdebug_driver_probe(struct device * dev)
3943{
3944 int error = 0;
3945 struct sdebug_host_info *sdbg_host;
3946 struct Scsi_Host *hpnt;
3947 int host_prot;
3948
3949 sdbg_host = to_sdebug_host(dev);
3950
3951 sdebug_driver_template.can_queue = scsi_debug_max_queue;
3952 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
3953 if (NULL == hpnt) {
3954 printk(KERN_ERR "%s: scsi_register failed\n", __func__);
3955 error = -ENODEV;
3956 return error;
3957 }
3958
3959 sdbg_host->shost = hpnt;
3960 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
3961 if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id))
3962 hpnt->max_id = scsi_debug_num_tgts + 1;
3963 else
3964 hpnt->max_id = scsi_debug_num_tgts;
3965 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; /* = scsi_debug_max_luns; */
3966
3967 host_prot = 0;
3968
3969 switch (scsi_debug_dif) {
3970
3971 case SD_DIF_TYPE1_PROTECTION:
3972 host_prot = SHOST_DIF_TYPE1_PROTECTION;
3973 if (scsi_debug_dix)
3974 host_prot |= SHOST_DIX_TYPE1_PROTECTION;
3975 break;
3976
3977 case SD_DIF_TYPE2_PROTECTION:
3978 host_prot = SHOST_DIF_TYPE2_PROTECTION;
3979 if (scsi_debug_dix)
3980 host_prot |= SHOST_DIX_TYPE2_PROTECTION;
3981 break;
3982
3983 case SD_DIF_TYPE3_PROTECTION:
3984 host_prot = SHOST_DIF_TYPE3_PROTECTION;
3985 if (scsi_debug_dix)
3986 host_prot |= SHOST_DIX_TYPE3_PROTECTION;
3987 break;
3988
3989 default:
3990 if (scsi_debug_dix)
3991 host_prot |= SHOST_DIX_TYPE0_PROTECTION;
3992 break;
3993 }
3994
3995 scsi_host_set_prot(hpnt, host_prot);
3996
3997 printk(KERN_INFO "scsi_debug: host protection%s%s%s%s%s%s%s\n",
3998 (host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
3999 (host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
4000 (host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
4001 (host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
4002 (host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
4003 (host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
4004 (host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
4005
4006 if (scsi_debug_guard == 1)
4007 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
4008 else
4009 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
4010
4011 error = scsi_add_host(hpnt, &sdbg_host->dev);
4012 if (error) {
4013 printk(KERN_ERR "%s: scsi_add_host failed\n", __func__);
4014 error = -ENODEV;
4015 scsi_host_put(hpnt);
4016 } else
4017 scsi_scan_host(hpnt);
4018
4019
4020 return error;
4021}
4022
4023static int sdebug_driver_remove(struct device * dev)
4024{
4025 struct sdebug_host_info *sdbg_host;
4026 struct sdebug_dev_info *sdbg_devinfo, *tmp;
4027
4028 sdbg_host = to_sdebug_host(dev);
4029
4030 if (!sdbg_host) {
4031 printk(KERN_ERR "%s: Unable to locate host info\n",
4032 __func__);
4033 return -ENODEV;
4034 }
4035
4036 scsi_remove_host(sdbg_host->shost);
4037
4038 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
4039 dev_list) {
4040 list_del(&sdbg_devinfo->dev_list);
4041 kfree(sdbg_devinfo);
4042 }
4043
4044 scsi_host_put(sdbg_host->shost);
4045 return 0;
4046}
4047
4048static int pseudo_lld_bus_match(struct device *dev,
4049 struct device_driver *dev_driver)
4050{
4051 return 1;
4052}
4053
4054static struct bus_type pseudo_lld_bus = {
4055 .name = "pseudo",
4056 .match = pseudo_lld_bus_match,
4057 .probe = sdebug_driver_probe,
4058 .remove = sdebug_driver_remove,
4059};
1/*
2 * vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
3 * Copyright (C) 1992 Eric Youngdale
4 * Simulate a host adapter with 2 disks attached. Do a lot of checking
5 * to make sure that we are not getting blocks mixed up, and PANIC if
6 * anything out of the ordinary is seen.
7 * ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
8 *
9 * This version is more generic, simulating a variable number of disk
10 * (or disk like devices) sharing a common amount of RAM. To be more
11 * realistic, the simulated devices have the transport attributes of
12 * SAS disks.
13 *
14 *
15 * For documentation see http://sg.danny.cz/sg/sdebug26.html
16 *
17 * D. Gilbert (dpg) work for Magneto-Optical device test [20010421]
18 * dpg: work for devfs large number of disks [20010809]
19 * forked for lk 2.5 series [20011216, 20020101]
20 * use vmalloc() more inquiry+mode_sense [20020302]
21 * add timers for delayed responses [20020721]
22 * Patrick Mansfield <patmans@us.ibm.com> max_luns+scsi_level [20021031]
23 * Mike Anderson <andmike@us.ibm.com> sysfs work [20021118]
24 * dpg: change style of boot options to "scsi_debug.num_tgts=2" and
25 * module options to "modprobe scsi_debug num_tgts=2" [20021221]
26 */
27
28#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 LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
68#define UNRECOVERED_READ_ERR 0x11
69#define PARAMETER_LIST_LENGTH_ERR 0x1a
70#define INVALID_OPCODE 0x20
71#define ADDR_OUT_OF_RANGE 0x21
72#define INVALID_COMMAND_OPCODE 0x20
73#define INVALID_FIELD_IN_CDB 0x24
74#define INVALID_FIELD_IN_PARAM_LIST 0x26
75#define POWERON_RESET 0x29
76#define SAVING_PARAMS_UNSUP 0x39
77#define TRANSPORT_PROBLEM 0x4b
78#define THRESHOLD_EXCEEDED 0x5d
79#define LOW_POWER_COND_ON 0x5e
80
81/* Additional Sense Code Qualifier (ASCQ) */
82#define ACK_NAK_TO 0x3
83
84#define SDEBUG_TAGGED_QUEUING 0 /* 0 | MSG_SIMPLE_TAG | MSG_ORDERED_TAG */
85
86/* Default values for driver parameters */
87#define DEF_NUM_HOST 1
88#define DEF_NUM_TGTS 1
89#define DEF_MAX_LUNS 1
90/* With these defaults, this driver will make 1 host with 1 target
91 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
92 */
93#define DEF_ATO 1
94#define DEF_DELAY 1
95#define DEF_DEV_SIZE_MB 8
96#define DEF_DIF 0
97#define DEF_DIX 0
98#define DEF_D_SENSE 0
99#define DEF_EVERY_NTH 0
100#define DEF_FAKE_RW 0
101#define DEF_GUARD 0
102#define DEF_LBPU 0
103#define DEF_LBPWS 0
104#define DEF_LBPWS10 0
105#define DEF_LBPRZ 1
106#define DEF_LOWEST_ALIGNED 0
107#define DEF_NO_LUN_0 0
108#define DEF_NUM_PARTS 0
109#define DEF_OPTS 0
110#define DEF_OPT_BLKS 64
111#define DEF_PHYSBLK_EXP 0
112#define DEF_PTYPE 0
113#define DEF_REMOVABLE false
114#define DEF_SCSI_LEVEL 5 /* INQUIRY, byte2 [5->SPC-3] */
115#define DEF_SECTOR_SIZE 512
116#define DEF_UNMAP_ALIGNMENT 0
117#define DEF_UNMAP_GRANULARITY 1
118#define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
119#define DEF_UNMAP_MAX_DESC 256
120#define DEF_VIRTUAL_GB 0
121#define DEF_VPD_USE_HOSTNO 1
122#define DEF_WRITESAME_LENGTH 0xFFFF
123
124/* bit mask values for scsi_debug_opts */
125#define SCSI_DEBUG_OPT_NOISE 1
126#define SCSI_DEBUG_OPT_MEDIUM_ERR 2
127#define SCSI_DEBUG_OPT_TIMEOUT 4
128#define SCSI_DEBUG_OPT_RECOVERED_ERR 8
129#define SCSI_DEBUG_OPT_TRANSPORT_ERR 16
130#define SCSI_DEBUG_OPT_DIF_ERR 32
131#define SCSI_DEBUG_OPT_DIX_ERR 64
132#define SCSI_DEBUG_OPT_MAC_TIMEOUT 128
133/* When "every_nth" > 0 then modulo "every_nth" commands:
134 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
135 * - a RECOVERED_ERROR is simulated on successful read and write
136 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
137 * - a TRANSPORT_ERROR is simulated on successful read and write
138 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
139 *
140 * When "every_nth" < 0 then after "- every_nth" commands:
141 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
142 * - a RECOVERED_ERROR is simulated on successful read and write
143 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
144 * - a TRANSPORT_ERROR is simulated on successful read and write
145 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
146 * This will continue until some other action occurs (e.g. the user
147 * writing a new value (other than -1 or 1) to every_nth via sysfs).
148 */
149
150/* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
151 * sector on read commands: */
152#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
153#define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
154
155/* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
156 * or "peripheral device" addressing (value 0) */
157#define SAM2_LUN_ADDRESS_METHOD 0
158#define SAM2_WLUN_REPORT_LUNS 0xc101
159
160/* Can queue up to this number of commands. Typically commands that
161 * that have a non-zero delay are queued. */
162#define SCSI_DEBUG_CANQUEUE 255
163
164static int scsi_debug_add_host = DEF_NUM_HOST;
165static int scsi_debug_ato = DEF_ATO;
166static int scsi_debug_delay = DEF_DELAY;
167static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB;
168static int scsi_debug_dif = DEF_DIF;
169static int scsi_debug_dix = DEF_DIX;
170static int scsi_debug_dsense = DEF_D_SENSE;
171static int scsi_debug_every_nth = DEF_EVERY_NTH;
172static int scsi_debug_fake_rw = DEF_FAKE_RW;
173static unsigned int scsi_debug_guard = DEF_GUARD;
174static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED;
175static int scsi_debug_max_luns = DEF_MAX_LUNS;
176static int scsi_debug_max_queue = SCSI_DEBUG_CANQUEUE;
177static int scsi_debug_no_lun_0 = DEF_NO_LUN_0;
178static int scsi_debug_no_uld = 0;
179static int scsi_debug_num_parts = DEF_NUM_PARTS;
180static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */
181static int scsi_debug_opt_blks = DEF_OPT_BLKS;
182static int scsi_debug_opts = DEF_OPTS;
183static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP;
184static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */
185static int scsi_debug_scsi_level = DEF_SCSI_LEVEL;
186static int scsi_debug_sector_size = DEF_SECTOR_SIZE;
187static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB;
188static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
189static unsigned int scsi_debug_lbpu = DEF_LBPU;
190static unsigned int scsi_debug_lbpws = DEF_LBPWS;
191static unsigned int scsi_debug_lbpws10 = DEF_LBPWS10;
192static unsigned int scsi_debug_lbprz = DEF_LBPRZ;
193static unsigned int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
194static unsigned int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY;
195static unsigned int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
196static unsigned int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
197static unsigned int scsi_debug_write_same_length = DEF_WRITESAME_LENGTH;
198static bool scsi_debug_removable = DEF_REMOVABLE;
199static bool scsi_debug_clustering;
200
201static int scsi_debug_cmnd_count = 0;
202
203#define DEV_READONLY(TGT) (0)
204
205static unsigned int sdebug_store_sectors;
206static sector_t sdebug_capacity; /* in sectors */
207
208/* old BIOS stuff, kernel may get rid of them but some mode sense pages
209 may still need them */
210static int sdebug_heads; /* heads per disk */
211static int sdebug_cylinders_per; /* cylinders per surface */
212static int sdebug_sectors_per; /* sectors per cylinder */
213
214#define SDEBUG_MAX_PARTS 4
215
216#define SDEBUG_SENSE_LEN 32
217
218#define SCSI_DEBUG_MAX_CMD_LEN 32
219
220static unsigned int scsi_debug_lbp(void)
221{
222 return scsi_debug_lbpu | scsi_debug_lbpws | scsi_debug_lbpws10;
223}
224
225struct sdebug_dev_info {
226 struct list_head dev_list;
227 unsigned char sense_buff[SDEBUG_SENSE_LEN]; /* weak nexus */
228 unsigned int channel;
229 unsigned int target;
230 unsigned int lun;
231 struct sdebug_host_info *sdbg_host;
232 unsigned int wlun;
233 char reset;
234 char stopped;
235 char used;
236};
237
238struct sdebug_host_info {
239 struct list_head host_list;
240 struct Scsi_Host *shost;
241 struct device dev;
242 struct list_head dev_info_list;
243};
244
245#define to_sdebug_host(d) \
246 container_of(d, struct sdebug_host_info, dev)
247
248static LIST_HEAD(sdebug_host_list);
249static DEFINE_SPINLOCK(sdebug_host_list_lock);
250
251typedef void (* done_funct_t) (struct scsi_cmnd *);
252
253struct sdebug_queued_cmd {
254 int in_use;
255 struct timer_list cmnd_timer;
256 done_funct_t done_funct;
257 struct scsi_cmnd * a_cmnd;
258 int scsi_result;
259};
260static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
261
262static unsigned char * fake_storep; /* ramdisk storage */
263static struct sd_dif_tuple *dif_storep; /* protection info */
264static void *map_storep; /* provisioning map */
265
266static unsigned long map_size;
267static int num_aborts = 0;
268static int num_dev_resets = 0;
269static int num_bus_resets = 0;
270static int num_host_resets = 0;
271static int dix_writes;
272static int dix_reads;
273static int dif_errors;
274
275static DEFINE_SPINLOCK(queued_arr_lock);
276static DEFINE_RWLOCK(atomic_rw);
277
278static char sdebug_proc_name[] = "scsi_debug";
279
280static struct bus_type pseudo_lld_bus;
281
282static struct device_driver sdebug_driverfs_driver = {
283 .name = sdebug_proc_name,
284 .bus = &pseudo_lld_bus,
285};
286
287static const int check_condition_result =
288 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
289
290static const int illegal_condition_result =
291 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
292
293static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
294 0, 0, 0x2, 0x4b};
295static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
296 0, 0, 0x0, 0x0};
297
298static void *fake_store(unsigned long long lba)
299{
300 lba = do_div(lba, sdebug_store_sectors);
301
302 return fake_storep + lba * scsi_debug_sector_size;
303}
304
305static struct sd_dif_tuple *dif_store(sector_t sector)
306{
307 sector = do_div(sector, sdebug_store_sectors);
308
309 return dif_storep + sector;
310}
311
312static int sdebug_add_adapter(void);
313static void sdebug_remove_adapter(void);
314
315static void sdebug_max_tgts_luns(void)
316{
317 struct sdebug_host_info *sdbg_host;
318 struct Scsi_Host *hpnt;
319
320 spin_lock(&sdebug_host_list_lock);
321 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
322 hpnt = sdbg_host->shost;
323 if ((hpnt->this_id >= 0) &&
324 (scsi_debug_num_tgts > hpnt->this_id))
325 hpnt->max_id = scsi_debug_num_tgts + 1;
326 else
327 hpnt->max_id = scsi_debug_num_tgts;
328 /* scsi_debug_max_luns; */
329 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS;
330 }
331 spin_unlock(&sdebug_host_list_lock);
332}
333
334static void mk_sense_buffer(struct sdebug_dev_info *devip, int key,
335 int asc, int asq)
336{
337 unsigned char *sbuff;
338
339 sbuff = devip->sense_buff;
340 memset(sbuff, 0, SDEBUG_SENSE_LEN);
341
342 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, key, asc, asq);
343
344 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
345 printk(KERN_INFO "scsi_debug: [sense_key,asc,ascq]: "
346 "[0x%x,0x%x,0x%x]\n", key, asc, asq);
347}
348
349static void get_data_transfer_info(unsigned char *cmd,
350 unsigned long long *lba, unsigned int *num,
351 u32 *ei_lba)
352{
353 *ei_lba = 0;
354
355 switch (*cmd) {
356 case VARIABLE_LENGTH_CMD:
357 *lba = (u64)cmd[19] | (u64)cmd[18] << 8 |
358 (u64)cmd[17] << 16 | (u64)cmd[16] << 24 |
359 (u64)cmd[15] << 32 | (u64)cmd[14] << 40 |
360 (u64)cmd[13] << 48 | (u64)cmd[12] << 56;
361
362 *ei_lba = (u32)cmd[23] | (u32)cmd[22] << 8 |
363 (u32)cmd[21] << 16 | (u32)cmd[20] << 24;
364
365 *num = (u32)cmd[31] | (u32)cmd[30] << 8 | (u32)cmd[29] << 16 |
366 (u32)cmd[28] << 24;
367 break;
368
369 case WRITE_SAME_16:
370 case WRITE_16:
371 case READ_16:
372 *lba = (u64)cmd[9] | (u64)cmd[8] << 8 |
373 (u64)cmd[7] << 16 | (u64)cmd[6] << 24 |
374 (u64)cmd[5] << 32 | (u64)cmd[4] << 40 |
375 (u64)cmd[3] << 48 | (u64)cmd[2] << 56;
376
377 *num = (u32)cmd[13] | (u32)cmd[12] << 8 | (u32)cmd[11] << 16 |
378 (u32)cmd[10] << 24;
379 break;
380 case WRITE_12:
381 case READ_12:
382 *lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 |
383 (u32)cmd[2] << 24;
384
385 *num = (u32)cmd[9] | (u32)cmd[8] << 8 | (u32)cmd[7] << 16 |
386 (u32)cmd[6] << 24;
387 break;
388 case WRITE_SAME:
389 case WRITE_10:
390 case READ_10:
391 case XDWRITEREAD_10:
392 *lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 |
393 (u32)cmd[2] << 24;
394
395 *num = (u32)cmd[8] | (u32)cmd[7] << 8;
396 break;
397 case WRITE_6:
398 case READ_6:
399 *lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
400 (u32)(cmd[1] & 0x1f) << 16;
401 *num = (0 == cmd[4]) ? 256 : cmd[4];
402 break;
403 default:
404 break;
405 }
406}
407
408static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
409{
410 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
411 printk(KERN_INFO "scsi_debug: ioctl: cmd=0x%x\n", cmd);
412 }
413 return -EINVAL;
414 /* return -ENOTTY; // correct return but upsets fdisk */
415}
416
417static int check_readiness(struct scsi_cmnd * SCpnt, int reset_only,
418 struct sdebug_dev_info * devip)
419{
420 if (devip->reset) {
421 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
422 printk(KERN_INFO "scsi_debug: Reporting Unit "
423 "attention: power on reset\n");
424 devip->reset = 0;
425 mk_sense_buffer(devip, UNIT_ATTENTION, POWERON_RESET, 0);
426 return check_condition_result;
427 }
428 if ((0 == reset_only) && devip->stopped) {
429 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
430 printk(KERN_INFO "scsi_debug: Reporting Not "
431 "ready: initializing command required\n");
432 mk_sense_buffer(devip, NOT_READY, LOGICAL_UNIT_NOT_READY,
433 0x2);
434 return check_condition_result;
435 }
436 return 0;
437}
438
439/* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */
440static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
441 int arr_len)
442{
443 int act_len;
444 struct scsi_data_buffer *sdb = scsi_in(scp);
445
446 if (!sdb->length)
447 return 0;
448 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
449 return (DID_ERROR << 16);
450
451 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
452 arr, arr_len);
453 sdb->resid = scsi_bufflen(scp) - act_len;
454
455 return 0;
456}
457
458/* Returns number of bytes fetched into 'arr' or -1 if error. */
459static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
460 int arr_len)
461{
462 if (!scsi_bufflen(scp))
463 return 0;
464 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE))
465 return -1;
466
467 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
468}
469
470
471static const char * inq_vendor_id = "Linux ";
472static const char * inq_product_id = "scsi_debug ";
473static const char * inq_product_rev = "0004";
474
475static int inquiry_evpd_83(unsigned char * arr, int port_group_id,
476 int target_dev_id, int dev_id_num,
477 const char * dev_id_str,
478 int dev_id_str_len)
479{
480 int num, port_a;
481 char b[32];
482
483 port_a = target_dev_id + 1;
484 /* T10 vendor identifier field format (faked) */
485 arr[0] = 0x2; /* ASCII */
486 arr[1] = 0x1;
487 arr[2] = 0x0;
488 memcpy(&arr[4], inq_vendor_id, 8);
489 memcpy(&arr[12], inq_product_id, 16);
490 memcpy(&arr[28], dev_id_str, dev_id_str_len);
491 num = 8 + 16 + dev_id_str_len;
492 arr[3] = num;
493 num += 4;
494 if (dev_id_num >= 0) {
495 /* NAA-5, Logical unit identifier (binary) */
496 arr[num++] = 0x1; /* binary (not necessarily sas) */
497 arr[num++] = 0x3; /* PIV=0, lu, naa */
498 arr[num++] = 0x0;
499 arr[num++] = 0x8;
500 arr[num++] = 0x53; /* naa-5 ieee company id=0x333333 (fake) */
501 arr[num++] = 0x33;
502 arr[num++] = 0x33;
503 arr[num++] = 0x30;
504 arr[num++] = (dev_id_num >> 24);
505 arr[num++] = (dev_id_num >> 16) & 0xff;
506 arr[num++] = (dev_id_num >> 8) & 0xff;
507 arr[num++] = dev_id_num & 0xff;
508 /* Target relative port number */
509 arr[num++] = 0x61; /* proto=sas, binary */
510 arr[num++] = 0x94; /* PIV=1, target port, rel port */
511 arr[num++] = 0x0; /* reserved */
512 arr[num++] = 0x4; /* length */
513 arr[num++] = 0x0; /* reserved */
514 arr[num++] = 0x0; /* reserved */
515 arr[num++] = 0x0;
516 arr[num++] = 0x1; /* relative port A */
517 }
518 /* NAA-5, Target port identifier */
519 arr[num++] = 0x61; /* proto=sas, binary */
520 arr[num++] = 0x93; /* piv=1, target port, naa */
521 arr[num++] = 0x0;
522 arr[num++] = 0x8;
523 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
524 arr[num++] = 0x22;
525 arr[num++] = 0x22;
526 arr[num++] = 0x20;
527 arr[num++] = (port_a >> 24);
528 arr[num++] = (port_a >> 16) & 0xff;
529 arr[num++] = (port_a >> 8) & 0xff;
530 arr[num++] = port_a & 0xff;
531 /* NAA-5, Target port group identifier */
532 arr[num++] = 0x61; /* proto=sas, binary */
533 arr[num++] = 0x95; /* piv=1, target port group id */
534 arr[num++] = 0x0;
535 arr[num++] = 0x4;
536 arr[num++] = 0;
537 arr[num++] = 0;
538 arr[num++] = (port_group_id >> 8) & 0xff;
539 arr[num++] = port_group_id & 0xff;
540 /* NAA-5, Target device identifier */
541 arr[num++] = 0x61; /* proto=sas, binary */
542 arr[num++] = 0xa3; /* piv=1, target device, naa */
543 arr[num++] = 0x0;
544 arr[num++] = 0x8;
545 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
546 arr[num++] = 0x22;
547 arr[num++] = 0x22;
548 arr[num++] = 0x20;
549 arr[num++] = (target_dev_id >> 24);
550 arr[num++] = (target_dev_id >> 16) & 0xff;
551 arr[num++] = (target_dev_id >> 8) & 0xff;
552 arr[num++] = target_dev_id & 0xff;
553 /* SCSI name string: Target device identifier */
554 arr[num++] = 0x63; /* proto=sas, UTF-8 */
555 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
556 arr[num++] = 0x0;
557 arr[num++] = 24;
558 memcpy(arr + num, "naa.52222220", 12);
559 num += 12;
560 snprintf(b, sizeof(b), "%08X", target_dev_id);
561 memcpy(arr + num, b, 8);
562 num += 8;
563 memset(arr + num, 0, 4);
564 num += 4;
565 return num;
566}
567
568
569static unsigned char vpd84_data[] = {
570/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
571 0x22,0x22,0x22,0x0,0xbb,0x1,
572 0x22,0x22,0x22,0x0,0xbb,0x2,
573};
574
575static int inquiry_evpd_84(unsigned char * arr)
576{
577 memcpy(arr, vpd84_data, sizeof(vpd84_data));
578 return sizeof(vpd84_data);
579}
580
581static int inquiry_evpd_85(unsigned char * arr)
582{
583 int num = 0;
584 const char * na1 = "https://www.kernel.org/config";
585 const char * na2 = "http://www.kernel.org/log";
586 int plen, olen;
587
588 arr[num++] = 0x1; /* lu, storage config */
589 arr[num++] = 0x0; /* reserved */
590 arr[num++] = 0x0;
591 olen = strlen(na1);
592 plen = olen + 1;
593 if (plen % 4)
594 plen = ((plen / 4) + 1) * 4;
595 arr[num++] = plen; /* length, null termianted, padded */
596 memcpy(arr + num, na1, olen);
597 memset(arr + num + olen, 0, plen - olen);
598 num += plen;
599
600 arr[num++] = 0x4; /* lu, logging */
601 arr[num++] = 0x0; /* reserved */
602 arr[num++] = 0x0;
603 olen = strlen(na2);
604 plen = olen + 1;
605 if (plen % 4)
606 plen = ((plen / 4) + 1) * 4;
607 arr[num++] = plen; /* length, null terminated, padded */
608 memcpy(arr + num, na2, olen);
609 memset(arr + num + olen, 0, plen - olen);
610 num += plen;
611
612 return num;
613}
614
615/* SCSI ports VPD page */
616static int inquiry_evpd_88(unsigned char * arr, int target_dev_id)
617{
618 int num = 0;
619 int port_a, port_b;
620
621 port_a = target_dev_id + 1;
622 port_b = port_a + 1;
623 arr[num++] = 0x0; /* reserved */
624 arr[num++] = 0x0; /* reserved */
625 arr[num++] = 0x0;
626 arr[num++] = 0x1; /* relative port 1 (primary) */
627 memset(arr + num, 0, 6);
628 num += 6;
629 arr[num++] = 0x0;
630 arr[num++] = 12; /* length tp descriptor */
631 /* naa-5 target port identifier (A) */
632 arr[num++] = 0x61; /* proto=sas, binary */
633 arr[num++] = 0x93; /* PIV=1, target port, NAA */
634 arr[num++] = 0x0; /* reserved */
635 arr[num++] = 0x8; /* length */
636 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
637 arr[num++] = 0x22;
638 arr[num++] = 0x22;
639 arr[num++] = 0x20;
640 arr[num++] = (port_a >> 24);
641 arr[num++] = (port_a >> 16) & 0xff;
642 arr[num++] = (port_a >> 8) & 0xff;
643 arr[num++] = port_a & 0xff;
644
645 arr[num++] = 0x0; /* reserved */
646 arr[num++] = 0x0; /* reserved */
647 arr[num++] = 0x0;
648 arr[num++] = 0x2; /* relative port 2 (secondary) */
649 memset(arr + num, 0, 6);
650 num += 6;
651 arr[num++] = 0x0;
652 arr[num++] = 12; /* length tp descriptor */
653 /* naa-5 target port identifier (B) */
654 arr[num++] = 0x61; /* proto=sas, binary */
655 arr[num++] = 0x93; /* PIV=1, target port, NAA */
656 arr[num++] = 0x0; /* reserved */
657 arr[num++] = 0x8; /* length */
658 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
659 arr[num++] = 0x22;
660 arr[num++] = 0x22;
661 arr[num++] = 0x20;
662 arr[num++] = (port_b >> 24);
663 arr[num++] = (port_b >> 16) & 0xff;
664 arr[num++] = (port_b >> 8) & 0xff;
665 arr[num++] = port_b & 0xff;
666
667 return num;
668}
669
670
671static unsigned char vpd89_data[] = {
672/* from 4th byte */ 0,0,0,0,
673'l','i','n','u','x',' ',' ',' ',
674'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
675'1','2','3','4',
6760x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
6770xec,0,0,0,
6780x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
6790,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
6800x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
6810x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
6820x53,0x41,
6830x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
6840x20,0x20,
6850x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
6860x10,0x80,
6870,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
6880x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
6890x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
6900,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
6910x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
6920x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
6930,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
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,
6970x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
6980,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
6990xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
7000,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,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,
7030,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
7040,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
7050,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
7060,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
7070,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
7080,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
7090,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
7100,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
7110,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
7120,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
713};
714
715static int inquiry_evpd_89(unsigned char * arr)
716{
717 memcpy(arr, vpd89_data, sizeof(vpd89_data));
718 return sizeof(vpd89_data);
719}
720
721
722/* Block limits VPD page (SBC-3) */
723static unsigned char vpdb0_data[] = {
724 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
725 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
726 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
727 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
728};
729
730static int inquiry_evpd_b0(unsigned char * arr)
731{
732 unsigned int gran;
733
734 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
735
736 /* Optimal transfer length granularity */
737 gran = 1 << scsi_debug_physblk_exp;
738 arr[2] = (gran >> 8) & 0xff;
739 arr[3] = gran & 0xff;
740
741 /* Maximum Transfer Length */
742 if (sdebug_store_sectors > 0x400) {
743 arr[4] = (sdebug_store_sectors >> 24) & 0xff;
744 arr[5] = (sdebug_store_sectors >> 16) & 0xff;
745 arr[6] = (sdebug_store_sectors >> 8) & 0xff;
746 arr[7] = sdebug_store_sectors & 0xff;
747 }
748
749 /* Optimal Transfer Length */
750 put_unaligned_be32(scsi_debug_opt_blks, &arr[8]);
751
752 if (scsi_debug_lbpu) {
753 /* Maximum Unmap LBA Count */
754 put_unaligned_be32(scsi_debug_unmap_max_blocks, &arr[16]);
755
756 /* Maximum Unmap Block Descriptor Count */
757 put_unaligned_be32(scsi_debug_unmap_max_desc, &arr[20]);
758 }
759
760 /* Unmap Granularity Alignment */
761 if (scsi_debug_unmap_alignment) {
762 put_unaligned_be32(scsi_debug_unmap_alignment, &arr[28]);
763 arr[28] |= 0x80; /* UGAVALID */
764 }
765
766 /* Optimal Unmap Granularity */
767 put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]);
768
769 /* Maximum WRITE SAME Length */
770 put_unaligned_be64(scsi_debug_write_same_length, &arr[32]);
771
772 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
773
774 return sizeof(vpdb0_data);
775}
776
777/* Block device characteristics VPD page (SBC-3) */
778static int inquiry_evpd_b1(unsigned char *arr)
779{
780 memset(arr, 0, 0x3c);
781 arr[0] = 0;
782 arr[1] = 1; /* non rotating medium (e.g. solid state) */
783 arr[2] = 0;
784 arr[3] = 5; /* less than 1.8" */
785
786 return 0x3c;
787}
788
789/* Logical block provisioning VPD page (SBC-3) */
790static int inquiry_evpd_b2(unsigned char *arr)
791{
792 memset(arr, 0, 0x4);
793 arr[0] = 0; /* threshold exponent */
794
795 if (scsi_debug_lbpu)
796 arr[1] = 1 << 7;
797
798 if (scsi_debug_lbpws)
799 arr[1] |= 1 << 6;
800
801 if (scsi_debug_lbpws10)
802 arr[1] |= 1 << 5;
803
804 if (scsi_debug_lbprz)
805 arr[1] |= 1 << 2;
806
807 return 0x4;
808}
809
810#define SDEBUG_LONG_INQ_SZ 96
811#define SDEBUG_MAX_INQ_ARR_SZ 584
812
813static int resp_inquiry(struct scsi_cmnd * scp, int target,
814 struct sdebug_dev_info * devip)
815{
816 unsigned char pq_pdt;
817 unsigned char * arr;
818 unsigned char *cmd = (unsigned char *)scp->cmnd;
819 int alloc_len, n, ret;
820
821 alloc_len = (cmd[3] << 8) + cmd[4];
822 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
823 if (! arr)
824 return DID_REQUEUE << 16;
825 if (devip->wlun)
826 pq_pdt = 0x1e; /* present, wlun */
827 else if (scsi_debug_no_lun_0 && (0 == devip->lun))
828 pq_pdt = 0x7f; /* not present, no device type */
829 else
830 pq_pdt = (scsi_debug_ptype & 0x1f);
831 arr[0] = pq_pdt;
832 if (0x2 & cmd[1]) { /* CMDDT bit set */
833 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
834 0);
835 kfree(arr);
836 return check_condition_result;
837 } else if (0x1 & cmd[1]) { /* EVPD bit set */
838 int lu_id_num, port_group_id, target_dev_id, len;
839 char lu_id_str[6];
840 int host_no = devip->sdbg_host->shost->host_no;
841
842 port_group_id = (((host_no + 1) & 0x7f) << 8) +
843 (devip->channel & 0x7f);
844 if (0 == scsi_debug_vpd_use_hostno)
845 host_no = 0;
846 lu_id_num = devip->wlun ? -1 : (((host_no + 1) * 2000) +
847 (devip->target * 1000) + devip->lun);
848 target_dev_id = ((host_no + 1) * 2000) +
849 (devip->target * 1000) - 3;
850 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
851 if (0 == cmd[2]) { /* supported vital product data pages */
852 arr[1] = cmd[2]; /*sanity */
853 n = 4;
854 arr[n++] = 0x0; /* this page */
855 arr[n++] = 0x80; /* unit serial number */
856 arr[n++] = 0x83; /* device identification */
857 arr[n++] = 0x84; /* software interface ident. */
858 arr[n++] = 0x85; /* management network addresses */
859 arr[n++] = 0x86; /* extended inquiry */
860 arr[n++] = 0x87; /* mode page policy */
861 arr[n++] = 0x88; /* SCSI ports */
862 arr[n++] = 0x89; /* ATA information */
863 arr[n++] = 0xb0; /* Block limits (SBC) */
864 arr[n++] = 0xb1; /* Block characteristics (SBC) */
865 if (scsi_debug_lbp()) /* Logical Block Prov. (SBC) */
866 arr[n++] = 0xb2;
867 arr[3] = n - 4; /* number of supported VPD pages */
868 } else if (0x80 == cmd[2]) { /* unit serial number */
869 arr[1] = cmd[2]; /*sanity */
870 arr[3] = len;
871 memcpy(&arr[4], lu_id_str, len);
872 } else if (0x83 == cmd[2]) { /* device identification */
873 arr[1] = cmd[2]; /*sanity */
874 arr[3] = inquiry_evpd_83(&arr[4], port_group_id,
875 target_dev_id, lu_id_num,
876 lu_id_str, len);
877 } else if (0x84 == cmd[2]) { /* Software interface ident. */
878 arr[1] = cmd[2]; /*sanity */
879 arr[3] = inquiry_evpd_84(&arr[4]);
880 } else if (0x85 == cmd[2]) { /* Management network addresses */
881 arr[1] = cmd[2]; /*sanity */
882 arr[3] = inquiry_evpd_85(&arr[4]);
883 } else if (0x86 == cmd[2]) { /* extended inquiry */
884 arr[1] = cmd[2]; /*sanity */
885 arr[3] = 0x3c; /* number of following entries */
886 if (scsi_debug_dif == SD_DIF_TYPE3_PROTECTION)
887 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
888 else if (scsi_debug_dif)
889 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
890 else
891 arr[4] = 0x0; /* no protection stuff */
892 arr[5] = 0x7; /* head of q, ordered + simple q's */
893 } else if (0x87 == cmd[2]) { /* mode page policy */
894 arr[1] = cmd[2]; /*sanity */
895 arr[3] = 0x8; /* number of following entries */
896 arr[4] = 0x2; /* disconnect-reconnect mp */
897 arr[6] = 0x80; /* mlus, shared */
898 arr[8] = 0x18; /* protocol specific lu */
899 arr[10] = 0x82; /* mlus, per initiator port */
900 } else if (0x88 == cmd[2]) { /* SCSI Ports */
901 arr[1] = cmd[2]; /*sanity */
902 arr[3] = inquiry_evpd_88(&arr[4], target_dev_id);
903 } else if (0x89 == cmd[2]) { /* ATA information */
904 arr[1] = cmd[2]; /*sanity */
905 n = inquiry_evpd_89(&arr[4]);
906 arr[2] = (n >> 8);
907 arr[3] = (n & 0xff);
908 } else if (0xb0 == cmd[2]) { /* Block limits (SBC) */
909 arr[1] = cmd[2]; /*sanity */
910 arr[3] = inquiry_evpd_b0(&arr[4]);
911 } else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */
912 arr[1] = cmd[2]; /*sanity */
913 arr[3] = inquiry_evpd_b1(&arr[4]);
914 } else if (0xb2 == cmd[2]) { /* Logical Block Prov. (SBC) */
915 arr[1] = cmd[2]; /*sanity */
916 arr[3] = inquiry_evpd_b2(&arr[4]);
917 } else {
918 /* Illegal request, invalid field in cdb */
919 mk_sense_buffer(devip, ILLEGAL_REQUEST,
920 INVALID_FIELD_IN_CDB, 0);
921 kfree(arr);
922 return check_condition_result;
923 }
924 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
925 ret = fill_from_dev_buffer(scp, arr,
926 min(len, SDEBUG_MAX_INQ_ARR_SZ));
927 kfree(arr);
928 return ret;
929 }
930 /* drops through here for a standard inquiry */
931 arr[1] = scsi_debug_removable ? 0x80 : 0; /* Removable disk */
932 arr[2] = scsi_debug_scsi_level;
933 arr[3] = 2; /* response_data_format==2 */
934 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
935 arr[5] = scsi_debug_dif ? 1 : 0; /* PROTECT bit */
936 if (0 == scsi_debug_vpd_use_hostno)
937 arr[5] = 0x10; /* claim: implicit TGPS */
938 arr[6] = 0x10; /* claim: MultiP */
939 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
940 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
941 memcpy(&arr[8], inq_vendor_id, 8);
942 memcpy(&arr[16], inq_product_id, 16);
943 memcpy(&arr[32], inq_product_rev, 4);
944 /* version descriptors (2 bytes each) follow */
945 arr[58] = 0x0; arr[59] = 0x77; /* SAM-3 ANSI */
946 arr[60] = 0x3; arr[61] = 0x14; /* SPC-3 ANSI */
947 n = 62;
948 if (scsi_debug_ptype == 0) {
949 arr[n++] = 0x3; arr[n++] = 0x3d; /* SBC-2 ANSI */
950 } else if (scsi_debug_ptype == 1) {
951 arr[n++] = 0x3; arr[n++] = 0x60; /* SSC-2 no version */
952 }
953 arr[n++] = 0xc; arr[n++] = 0xf; /* SAS-1.1 rev 10 */
954 ret = fill_from_dev_buffer(scp, arr,
955 min(alloc_len, SDEBUG_LONG_INQ_SZ));
956 kfree(arr);
957 return ret;
958}
959
960static int resp_requests(struct scsi_cmnd * scp,
961 struct sdebug_dev_info * devip)
962{
963 unsigned char * sbuff;
964 unsigned char *cmd = (unsigned char *)scp->cmnd;
965 unsigned char arr[SDEBUG_SENSE_LEN];
966 int want_dsense;
967 int len = 18;
968
969 memset(arr, 0, sizeof(arr));
970 if (devip->reset == 1)
971 mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0);
972 want_dsense = !!(cmd[1] & 1) || scsi_debug_dsense;
973 sbuff = devip->sense_buff;
974 if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
975 if (want_dsense) {
976 arr[0] = 0x72;
977 arr[1] = 0x0; /* NO_SENSE in sense_key */
978 arr[2] = THRESHOLD_EXCEEDED;
979 arr[3] = 0xff; /* TEST set and MRIE==6 */
980 } else {
981 arr[0] = 0x70;
982 arr[2] = 0x0; /* NO_SENSE in sense_key */
983 arr[7] = 0xa; /* 18 byte sense buffer */
984 arr[12] = THRESHOLD_EXCEEDED;
985 arr[13] = 0xff; /* TEST set and MRIE==6 */
986 }
987 } else {
988 memcpy(arr, sbuff, SDEBUG_SENSE_LEN);
989 if ((cmd[1] & 1) && (! scsi_debug_dsense)) {
990 /* DESC bit set and sense_buff in fixed format */
991 memset(arr, 0, sizeof(arr));
992 arr[0] = 0x72;
993 arr[1] = sbuff[2]; /* sense key */
994 arr[2] = sbuff[12]; /* asc */
995 arr[3] = sbuff[13]; /* ascq */
996 len = 8;
997 }
998 }
999 mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0);
1000 return fill_from_dev_buffer(scp, arr, len);
1001}
1002
1003static int resp_start_stop(struct scsi_cmnd * scp,
1004 struct sdebug_dev_info * devip)
1005{
1006 unsigned char *cmd = (unsigned char *)scp->cmnd;
1007 int power_cond, errsts, start;
1008
1009 if ((errsts = check_readiness(scp, 1, devip)))
1010 return errsts;
1011 power_cond = (cmd[4] & 0xf0) >> 4;
1012 if (power_cond) {
1013 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
1014 0);
1015 return check_condition_result;
1016 }
1017 start = cmd[4] & 1;
1018 if (start == devip->stopped)
1019 devip->stopped = !start;
1020 return 0;
1021}
1022
1023static sector_t get_sdebug_capacity(void)
1024{
1025 if (scsi_debug_virtual_gb > 0)
1026 return (sector_t)scsi_debug_virtual_gb *
1027 (1073741824 / scsi_debug_sector_size);
1028 else
1029 return sdebug_store_sectors;
1030}
1031
1032#define SDEBUG_READCAP_ARR_SZ 8
1033static int resp_readcap(struct scsi_cmnd * scp,
1034 struct sdebug_dev_info * devip)
1035{
1036 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
1037 unsigned int capac;
1038 int errsts;
1039
1040 if ((errsts = check_readiness(scp, 1, devip)))
1041 return errsts;
1042 /* following just in case virtual_gb changed */
1043 sdebug_capacity = get_sdebug_capacity();
1044 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
1045 if (sdebug_capacity < 0xffffffff) {
1046 capac = (unsigned int)sdebug_capacity - 1;
1047 arr[0] = (capac >> 24);
1048 arr[1] = (capac >> 16) & 0xff;
1049 arr[2] = (capac >> 8) & 0xff;
1050 arr[3] = capac & 0xff;
1051 } else {
1052 arr[0] = 0xff;
1053 arr[1] = 0xff;
1054 arr[2] = 0xff;
1055 arr[3] = 0xff;
1056 }
1057 arr[6] = (scsi_debug_sector_size >> 8) & 0xff;
1058 arr[7] = scsi_debug_sector_size & 0xff;
1059 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1060}
1061
1062#define SDEBUG_READCAP16_ARR_SZ 32
1063static int resp_readcap16(struct scsi_cmnd * scp,
1064 struct sdebug_dev_info * devip)
1065{
1066 unsigned char *cmd = (unsigned char *)scp->cmnd;
1067 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
1068 unsigned long long capac;
1069 int errsts, k, alloc_len;
1070
1071 if ((errsts = check_readiness(scp, 1, devip)))
1072 return errsts;
1073 alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8)
1074 + cmd[13]);
1075 /* following just in case virtual_gb changed */
1076 sdebug_capacity = get_sdebug_capacity();
1077 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
1078 capac = sdebug_capacity - 1;
1079 for (k = 0; k < 8; ++k, capac >>= 8)
1080 arr[7 - k] = capac & 0xff;
1081 arr[8] = (scsi_debug_sector_size >> 24) & 0xff;
1082 arr[9] = (scsi_debug_sector_size >> 16) & 0xff;
1083 arr[10] = (scsi_debug_sector_size >> 8) & 0xff;
1084 arr[11] = scsi_debug_sector_size & 0xff;
1085 arr[13] = scsi_debug_physblk_exp & 0xf;
1086 arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f;
1087
1088 if (scsi_debug_lbp()) {
1089 arr[14] |= 0x80; /* LBPME */
1090 if (scsi_debug_lbprz)
1091 arr[14] |= 0x40; /* LBPRZ */
1092 }
1093
1094 arr[15] = scsi_debug_lowest_aligned & 0xff;
1095
1096 if (scsi_debug_dif) {
1097 arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */
1098 arr[12] |= 1; /* PROT_EN */
1099 }
1100
1101 return fill_from_dev_buffer(scp, arr,
1102 min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
1103}
1104
1105#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1106
1107static int resp_report_tgtpgs(struct scsi_cmnd * scp,
1108 struct sdebug_dev_info * devip)
1109{
1110 unsigned char *cmd = (unsigned char *)scp->cmnd;
1111 unsigned char * arr;
1112 int host_no = devip->sdbg_host->shost->host_no;
1113 int n, ret, alen, rlen;
1114 int port_group_a, port_group_b, port_a, port_b;
1115
1116 alen = ((cmd[6] << 24) + (cmd[7] << 16) + (cmd[8] << 8)
1117 + cmd[9]);
1118
1119 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1120 if (! arr)
1121 return DID_REQUEUE << 16;
1122 /*
1123 * EVPD page 0x88 states we have two ports, one
1124 * real and a fake port with no device connected.
1125 * So we create two port groups with one port each
1126 * and set the group with port B to unavailable.
1127 */
1128 port_a = 0x1; /* relative port A */
1129 port_b = 0x2; /* relative port B */
1130 port_group_a = (((host_no + 1) & 0x7f) << 8) +
1131 (devip->channel & 0x7f);
1132 port_group_b = (((host_no + 1) & 0x7f) << 8) +
1133 (devip->channel & 0x7f) + 0x80;
1134
1135 /*
1136 * The asymmetric access state is cycled according to the host_id.
1137 */
1138 n = 4;
1139 if (0 == scsi_debug_vpd_use_hostno) {
1140 arr[n++] = host_no % 3; /* Asymm access state */
1141 arr[n++] = 0x0F; /* claim: all states are supported */
1142 } else {
1143 arr[n++] = 0x0; /* Active/Optimized path */
1144 arr[n++] = 0x01; /* claim: only support active/optimized paths */
1145 }
1146 arr[n++] = (port_group_a >> 8) & 0xff;
1147 arr[n++] = port_group_a & 0xff;
1148 arr[n++] = 0; /* Reserved */
1149 arr[n++] = 0; /* Status code */
1150 arr[n++] = 0; /* Vendor unique */
1151 arr[n++] = 0x1; /* One port per group */
1152 arr[n++] = 0; /* Reserved */
1153 arr[n++] = 0; /* Reserved */
1154 arr[n++] = (port_a >> 8) & 0xff;
1155 arr[n++] = port_a & 0xff;
1156 arr[n++] = 3; /* Port unavailable */
1157 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
1158 arr[n++] = (port_group_b >> 8) & 0xff;
1159 arr[n++] = port_group_b & 0xff;
1160 arr[n++] = 0; /* Reserved */
1161 arr[n++] = 0; /* Status code */
1162 arr[n++] = 0; /* Vendor unique */
1163 arr[n++] = 0x1; /* One port per group */
1164 arr[n++] = 0; /* Reserved */
1165 arr[n++] = 0; /* Reserved */
1166 arr[n++] = (port_b >> 8) & 0xff;
1167 arr[n++] = port_b & 0xff;
1168
1169 rlen = n - 4;
1170 arr[0] = (rlen >> 24) & 0xff;
1171 arr[1] = (rlen >> 16) & 0xff;
1172 arr[2] = (rlen >> 8) & 0xff;
1173 arr[3] = rlen & 0xff;
1174
1175 /*
1176 * Return the smallest value of either
1177 * - The allocated length
1178 * - The constructed command length
1179 * - The maximum array size
1180 */
1181 rlen = min(alen,n);
1182 ret = fill_from_dev_buffer(scp, arr,
1183 min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1184 kfree(arr);
1185 return ret;
1186}
1187
1188/* <<Following mode page info copied from ST318451LW>> */
1189
1190static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target)
1191{ /* Read-Write Error Recovery page for mode_sense */
1192 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
1193 5, 0, 0xff, 0xff};
1194
1195 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
1196 if (1 == pcontrol)
1197 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
1198 return sizeof(err_recov_pg);
1199}
1200
1201static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target)
1202{ /* Disconnect-Reconnect page for mode_sense */
1203 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
1204 0, 0, 0, 0, 0, 0, 0, 0};
1205
1206 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
1207 if (1 == pcontrol)
1208 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
1209 return sizeof(disconnect_pg);
1210}
1211
1212static int resp_format_pg(unsigned char * p, int pcontrol, int target)
1213{ /* Format device page for mode_sense */
1214 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
1215 0, 0, 0, 0, 0, 0, 0, 0,
1216 0, 0, 0, 0, 0x40, 0, 0, 0};
1217
1218 memcpy(p, format_pg, sizeof(format_pg));
1219 p[10] = (sdebug_sectors_per >> 8) & 0xff;
1220 p[11] = sdebug_sectors_per & 0xff;
1221 p[12] = (scsi_debug_sector_size >> 8) & 0xff;
1222 p[13] = scsi_debug_sector_size & 0xff;
1223 if (scsi_debug_removable)
1224 p[20] |= 0x20; /* should agree with INQUIRY */
1225 if (1 == pcontrol)
1226 memset(p + 2, 0, sizeof(format_pg) - 2);
1227 return sizeof(format_pg);
1228}
1229
1230static int resp_caching_pg(unsigned char * p, int pcontrol, int target)
1231{ /* Caching page for mode_sense */
1232 unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
1233 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
1234
1235 memcpy(p, caching_pg, sizeof(caching_pg));
1236 if (1 == pcontrol)
1237 memset(p + 2, 0, sizeof(caching_pg) - 2);
1238 return sizeof(caching_pg);
1239}
1240
1241static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
1242{ /* Control mode page for mode_sense */
1243 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
1244 0, 0, 0, 0};
1245 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
1246 0, 0, 0x2, 0x4b};
1247
1248 if (scsi_debug_dsense)
1249 ctrl_m_pg[2] |= 0x4;
1250 else
1251 ctrl_m_pg[2] &= ~0x4;
1252
1253 if (scsi_debug_ato)
1254 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
1255
1256 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
1257 if (1 == pcontrol)
1258 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
1259 else if (2 == pcontrol)
1260 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
1261 return sizeof(ctrl_m_pg);
1262}
1263
1264
1265static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target)
1266{ /* Informational Exceptions control mode page for mode_sense */
1267 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
1268 0, 0, 0x0, 0x0};
1269 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1270 0, 0, 0x0, 0x0};
1271
1272 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
1273 if (1 == pcontrol)
1274 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
1275 else if (2 == pcontrol)
1276 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
1277 return sizeof(iec_m_pg);
1278}
1279
1280static int resp_sas_sf_m_pg(unsigned char * p, int pcontrol, int target)
1281{ /* SAS SSP mode page - short format for mode_sense */
1282 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
1283 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
1284
1285 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
1286 if (1 == pcontrol)
1287 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
1288 return sizeof(sas_sf_m_pg);
1289}
1290
1291
1292static int resp_sas_pcd_m_spg(unsigned char * p, int pcontrol, int target,
1293 int target_dev_id)
1294{ /* SAS phy control and discover mode page for mode_sense */
1295 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
1296 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
1297 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1298 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1299 0x2, 0, 0, 0, 0, 0, 0, 0,
1300 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1301 0, 0, 0, 0, 0, 0, 0, 0,
1302 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
1303 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1304 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1305 0x3, 0, 0, 0, 0, 0, 0, 0,
1306 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1307 0, 0, 0, 0, 0, 0, 0, 0,
1308 };
1309 int port_a, port_b;
1310
1311 port_a = target_dev_id + 1;
1312 port_b = port_a + 1;
1313 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
1314 p[20] = (port_a >> 24);
1315 p[21] = (port_a >> 16) & 0xff;
1316 p[22] = (port_a >> 8) & 0xff;
1317 p[23] = port_a & 0xff;
1318 p[48 + 20] = (port_b >> 24);
1319 p[48 + 21] = (port_b >> 16) & 0xff;
1320 p[48 + 22] = (port_b >> 8) & 0xff;
1321 p[48 + 23] = port_b & 0xff;
1322 if (1 == pcontrol)
1323 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
1324 return sizeof(sas_pcd_m_pg);
1325}
1326
1327static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol)
1328{ /* SAS SSP shared protocol specific port mode subpage */
1329 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
1330 0, 0, 0, 0, 0, 0, 0, 0,
1331 };
1332
1333 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
1334 if (1 == pcontrol)
1335 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
1336 return sizeof(sas_sha_m_pg);
1337}
1338
1339#define SDEBUG_MAX_MSENSE_SZ 256
1340
1341static int resp_mode_sense(struct scsi_cmnd * scp, int target,
1342 struct sdebug_dev_info * devip)
1343{
1344 unsigned char dbd, llbaa;
1345 int pcontrol, pcode, subpcode, bd_len;
1346 unsigned char dev_spec;
1347 int k, alloc_len, msense_6, offset, len, errsts, target_dev_id;
1348 unsigned char * ap;
1349 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
1350 unsigned char *cmd = (unsigned char *)scp->cmnd;
1351
1352 if ((errsts = check_readiness(scp, 1, devip)))
1353 return errsts;
1354 dbd = !!(cmd[1] & 0x8);
1355 pcontrol = (cmd[2] & 0xc0) >> 6;
1356 pcode = cmd[2] & 0x3f;
1357 subpcode = cmd[3];
1358 msense_6 = (MODE_SENSE == cmd[0]);
1359 llbaa = msense_6 ? 0 : !!(cmd[1] & 0x10);
1360 if ((0 == scsi_debug_ptype) && (0 == dbd))
1361 bd_len = llbaa ? 16 : 8;
1362 else
1363 bd_len = 0;
1364 alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]);
1365 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
1366 if (0x3 == pcontrol) { /* Saving values not supported */
1367 mk_sense_buffer(devip, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP,
1368 0);
1369 return check_condition_result;
1370 }
1371 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
1372 (devip->target * 1000) - 3;
1373 /* set DPOFUA bit for disks */
1374 if (0 == scsi_debug_ptype)
1375 dev_spec = (DEV_READONLY(target) ? 0x80 : 0x0) | 0x10;
1376 else
1377 dev_spec = 0x0;
1378 if (msense_6) {
1379 arr[2] = dev_spec;
1380 arr[3] = bd_len;
1381 offset = 4;
1382 } else {
1383 arr[3] = dev_spec;
1384 if (16 == bd_len)
1385 arr[4] = 0x1; /* set LONGLBA bit */
1386 arr[7] = bd_len; /* assume 255 or less */
1387 offset = 8;
1388 }
1389 ap = arr + offset;
1390 if ((bd_len > 0) && (!sdebug_capacity))
1391 sdebug_capacity = get_sdebug_capacity();
1392
1393 if (8 == bd_len) {
1394 if (sdebug_capacity > 0xfffffffe) {
1395 ap[0] = 0xff;
1396 ap[1] = 0xff;
1397 ap[2] = 0xff;
1398 ap[3] = 0xff;
1399 } else {
1400 ap[0] = (sdebug_capacity >> 24) & 0xff;
1401 ap[1] = (sdebug_capacity >> 16) & 0xff;
1402 ap[2] = (sdebug_capacity >> 8) & 0xff;
1403 ap[3] = sdebug_capacity & 0xff;
1404 }
1405 ap[6] = (scsi_debug_sector_size >> 8) & 0xff;
1406 ap[7] = scsi_debug_sector_size & 0xff;
1407 offset += bd_len;
1408 ap = arr + offset;
1409 } else if (16 == bd_len) {
1410 unsigned long long capac = sdebug_capacity;
1411
1412 for (k = 0; k < 8; ++k, capac >>= 8)
1413 ap[7 - k] = capac & 0xff;
1414 ap[12] = (scsi_debug_sector_size >> 24) & 0xff;
1415 ap[13] = (scsi_debug_sector_size >> 16) & 0xff;
1416 ap[14] = (scsi_debug_sector_size >> 8) & 0xff;
1417 ap[15] = scsi_debug_sector_size & 0xff;
1418 offset += bd_len;
1419 ap = arr + offset;
1420 }
1421
1422 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
1423 /* TODO: Control Extension page */
1424 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
1425 0);
1426 return check_condition_result;
1427 }
1428 switch (pcode) {
1429 case 0x1: /* Read-Write error recovery page, direct access */
1430 len = resp_err_recov_pg(ap, pcontrol, target);
1431 offset += len;
1432 break;
1433 case 0x2: /* Disconnect-Reconnect page, all devices */
1434 len = resp_disconnect_pg(ap, pcontrol, target);
1435 offset += len;
1436 break;
1437 case 0x3: /* Format device page, direct access */
1438 len = resp_format_pg(ap, pcontrol, target);
1439 offset += len;
1440 break;
1441 case 0x8: /* Caching page, direct access */
1442 len = resp_caching_pg(ap, pcontrol, target);
1443 offset += len;
1444 break;
1445 case 0xa: /* Control Mode page, all devices */
1446 len = resp_ctrl_m_pg(ap, pcontrol, target);
1447 offset += len;
1448 break;
1449 case 0x19: /* if spc==1 then sas phy, control+discover */
1450 if ((subpcode > 0x2) && (subpcode < 0xff)) {
1451 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1452 INVALID_FIELD_IN_CDB, 0);
1453 return check_condition_result;
1454 }
1455 len = 0;
1456 if ((0x0 == subpcode) || (0xff == subpcode))
1457 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
1458 if ((0x1 == subpcode) || (0xff == subpcode))
1459 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
1460 target_dev_id);
1461 if ((0x2 == subpcode) || (0xff == subpcode))
1462 len += resp_sas_sha_m_spg(ap + len, pcontrol);
1463 offset += len;
1464 break;
1465 case 0x1c: /* Informational Exceptions Mode page, all devices */
1466 len = resp_iec_m_pg(ap, pcontrol, target);
1467 offset += len;
1468 break;
1469 case 0x3f: /* Read all Mode pages */
1470 if ((0 == subpcode) || (0xff == subpcode)) {
1471 len = resp_err_recov_pg(ap, pcontrol, target);
1472 len += resp_disconnect_pg(ap + len, pcontrol, target);
1473 len += resp_format_pg(ap + len, pcontrol, target);
1474 len += resp_caching_pg(ap + len, pcontrol, target);
1475 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
1476 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
1477 if (0xff == subpcode) {
1478 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
1479 target, target_dev_id);
1480 len += resp_sas_sha_m_spg(ap + len, pcontrol);
1481 }
1482 len += resp_iec_m_pg(ap + len, pcontrol, target);
1483 } else {
1484 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1485 INVALID_FIELD_IN_CDB, 0);
1486 return check_condition_result;
1487 }
1488 offset += len;
1489 break;
1490 default:
1491 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
1492 0);
1493 return check_condition_result;
1494 }
1495 if (msense_6)
1496 arr[0] = offset - 1;
1497 else {
1498 arr[0] = ((offset - 2) >> 8) & 0xff;
1499 arr[1] = (offset - 2) & 0xff;
1500 }
1501 return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
1502}
1503
1504#define SDEBUG_MAX_MSELECT_SZ 512
1505
1506static int resp_mode_select(struct scsi_cmnd * scp, int mselect6,
1507 struct sdebug_dev_info * devip)
1508{
1509 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
1510 int param_len, res, errsts, mpage;
1511 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
1512 unsigned char *cmd = (unsigned char *)scp->cmnd;
1513
1514 if ((errsts = check_readiness(scp, 1, devip)))
1515 return errsts;
1516 memset(arr, 0, sizeof(arr));
1517 pf = cmd[1] & 0x10;
1518 sp = cmd[1] & 0x1;
1519 param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]);
1520 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
1521 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1522 INVALID_FIELD_IN_CDB, 0);
1523 return check_condition_result;
1524 }
1525 res = fetch_to_dev_buffer(scp, arr, param_len);
1526 if (-1 == res)
1527 return (DID_ERROR << 16);
1528 else if ((res < param_len) &&
1529 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
1530 printk(KERN_INFO "scsi_debug: mode_select: cdb indicated=%d, "
1531 " IO sent=%d bytes\n", param_len, res);
1532 md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2);
1533 bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]);
1534 if (md_len > 2) {
1535 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1536 INVALID_FIELD_IN_PARAM_LIST, 0);
1537 return check_condition_result;
1538 }
1539 off = bd_len + (mselect6 ? 4 : 8);
1540 mpage = arr[off] & 0x3f;
1541 ps = !!(arr[off] & 0x80);
1542 if (ps) {
1543 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1544 INVALID_FIELD_IN_PARAM_LIST, 0);
1545 return check_condition_result;
1546 }
1547 spf = !!(arr[off] & 0x40);
1548 pg_len = spf ? ((arr[off + 2] << 8) + arr[off + 3] + 4) :
1549 (arr[off + 1] + 2);
1550 if ((pg_len + off) > param_len) {
1551 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1552 PARAMETER_LIST_LENGTH_ERR, 0);
1553 return check_condition_result;
1554 }
1555 switch (mpage) {
1556 case 0xa: /* Control Mode page */
1557 if (ctrl_m_pg[1] == arr[off + 1]) {
1558 memcpy(ctrl_m_pg + 2, arr + off + 2,
1559 sizeof(ctrl_m_pg) - 2);
1560 scsi_debug_dsense = !!(ctrl_m_pg[2] & 0x4);
1561 return 0;
1562 }
1563 break;
1564 case 0x1c: /* Informational Exceptions Mode page */
1565 if (iec_m_pg[1] == arr[off + 1]) {
1566 memcpy(iec_m_pg + 2, arr + off + 2,
1567 sizeof(iec_m_pg) - 2);
1568 return 0;
1569 }
1570 break;
1571 default:
1572 break;
1573 }
1574 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1575 INVALID_FIELD_IN_PARAM_LIST, 0);
1576 return check_condition_result;
1577}
1578
1579static int resp_temp_l_pg(unsigned char * arr)
1580{
1581 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
1582 0x0, 0x1, 0x3, 0x2, 0x0, 65,
1583 };
1584
1585 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
1586 return sizeof(temp_l_pg);
1587}
1588
1589static int resp_ie_l_pg(unsigned char * arr)
1590{
1591 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
1592 };
1593
1594 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
1595 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
1596 arr[4] = THRESHOLD_EXCEEDED;
1597 arr[5] = 0xff;
1598 }
1599 return sizeof(ie_l_pg);
1600}
1601
1602#define SDEBUG_MAX_LSENSE_SZ 512
1603
1604static int resp_log_sense(struct scsi_cmnd * scp,
1605 struct sdebug_dev_info * devip)
1606{
1607 int ppc, sp, pcontrol, pcode, subpcode, alloc_len, errsts, len, n;
1608 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
1609 unsigned char *cmd = (unsigned char *)scp->cmnd;
1610
1611 if ((errsts = check_readiness(scp, 1, devip)))
1612 return errsts;
1613 memset(arr, 0, sizeof(arr));
1614 ppc = cmd[1] & 0x2;
1615 sp = cmd[1] & 0x1;
1616 if (ppc || sp) {
1617 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1618 INVALID_FIELD_IN_CDB, 0);
1619 return check_condition_result;
1620 }
1621 pcontrol = (cmd[2] & 0xc0) >> 6;
1622 pcode = cmd[2] & 0x3f;
1623 subpcode = cmd[3] & 0xff;
1624 alloc_len = (cmd[7] << 8) + cmd[8];
1625 arr[0] = pcode;
1626 if (0 == subpcode) {
1627 switch (pcode) {
1628 case 0x0: /* Supported log pages log page */
1629 n = 4;
1630 arr[n++] = 0x0; /* this page */
1631 arr[n++] = 0xd; /* Temperature */
1632 arr[n++] = 0x2f; /* Informational exceptions */
1633 arr[3] = n - 4;
1634 break;
1635 case 0xd: /* Temperature log page */
1636 arr[3] = resp_temp_l_pg(arr + 4);
1637 break;
1638 case 0x2f: /* Informational exceptions log page */
1639 arr[3] = resp_ie_l_pg(arr + 4);
1640 break;
1641 default:
1642 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1643 INVALID_FIELD_IN_CDB, 0);
1644 return check_condition_result;
1645 }
1646 } else if (0xff == subpcode) {
1647 arr[0] |= 0x40;
1648 arr[1] = subpcode;
1649 switch (pcode) {
1650 case 0x0: /* Supported log pages and subpages log page */
1651 n = 4;
1652 arr[n++] = 0x0;
1653 arr[n++] = 0x0; /* 0,0 page */
1654 arr[n++] = 0x0;
1655 arr[n++] = 0xff; /* this page */
1656 arr[n++] = 0xd;
1657 arr[n++] = 0x0; /* Temperature */
1658 arr[n++] = 0x2f;
1659 arr[n++] = 0x0; /* Informational exceptions */
1660 arr[3] = n - 4;
1661 break;
1662 case 0xd: /* Temperature subpages */
1663 n = 4;
1664 arr[n++] = 0xd;
1665 arr[n++] = 0x0; /* Temperature */
1666 arr[3] = n - 4;
1667 break;
1668 case 0x2f: /* Informational exceptions subpages */
1669 n = 4;
1670 arr[n++] = 0x2f;
1671 arr[n++] = 0x0; /* Informational exceptions */
1672 arr[3] = n - 4;
1673 break;
1674 default:
1675 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1676 INVALID_FIELD_IN_CDB, 0);
1677 return check_condition_result;
1678 }
1679 } else {
1680 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1681 INVALID_FIELD_IN_CDB, 0);
1682 return check_condition_result;
1683 }
1684 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
1685 return fill_from_dev_buffer(scp, arr,
1686 min(len, SDEBUG_MAX_INQ_ARR_SZ));
1687}
1688
1689static int check_device_access_params(struct sdebug_dev_info *devi,
1690 unsigned long long lba, unsigned int num)
1691{
1692 if (lba + num > sdebug_capacity) {
1693 mk_sense_buffer(devi, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE, 0);
1694 return check_condition_result;
1695 }
1696 /* transfer length excessive (tie in to block limits VPD page) */
1697 if (num > sdebug_store_sectors) {
1698 mk_sense_buffer(devi, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
1699 return check_condition_result;
1700 }
1701 return 0;
1702}
1703
1704/* Returns number of bytes copied or -1 if error. */
1705static int do_device_access(struct scsi_cmnd *scmd,
1706 struct sdebug_dev_info *devi,
1707 unsigned long long lba, unsigned int num, int write)
1708{
1709 int ret;
1710 unsigned long long block, rest = 0;
1711 struct scsi_data_buffer *sdb;
1712 enum dma_data_direction dir;
1713 size_t (*func)(struct scatterlist *, unsigned int, void *, size_t,
1714 off_t);
1715
1716 if (write) {
1717 sdb = scsi_out(scmd);
1718 dir = DMA_TO_DEVICE;
1719 func = sg_pcopy_to_buffer;
1720 } else {
1721 sdb = scsi_in(scmd);
1722 dir = DMA_FROM_DEVICE;
1723 func = sg_pcopy_from_buffer;
1724 }
1725
1726 if (!sdb->length)
1727 return 0;
1728 if (!(scsi_bidi_cmnd(scmd) || scmd->sc_data_direction == dir))
1729 return -1;
1730
1731 block = do_div(lba, sdebug_store_sectors);
1732 if (block + num > sdebug_store_sectors)
1733 rest = block + num - sdebug_store_sectors;
1734
1735 ret = func(sdb->table.sgl, sdb->table.nents,
1736 fake_storep + (block * scsi_debug_sector_size),
1737 (num - rest) * scsi_debug_sector_size, 0);
1738 if (ret != (num - rest) * scsi_debug_sector_size)
1739 return ret;
1740
1741 if (rest) {
1742 ret += func(sdb->table.sgl, sdb->table.nents,
1743 fake_storep, rest * scsi_debug_sector_size,
1744 (num - rest) * scsi_debug_sector_size);
1745 }
1746
1747 return ret;
1748}
1749
1750static __be16 dif_compute_csum(const void *buf, int len)
1751{
1752 __be16 csum;
1753
1754 if (scsi_debug_guard)
1755 csum = (__force __be16)ip_compute_csum(buf, len);
1756 else
1757 csum = cpu_to_be16(crc_t10dif(buf, len));
1758
1759 return csum;
1760}
1761
1762static int dif_verify(struct sd_dif_tuple *sdt, const void *data,
1763 sector_t sector, u32 ei_lba)
1764{
1765 __be16 csum = dif_compute_csum(data, scsi_debug_sector_size);
1766
1767 if (sdt->guard_tag != csum) {
1768 pr_err("%s: GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
1769 __func__,
1770 (unsigned long)sector,
1771 be16_to_cpu(sdt->guard_tag),
1772 be16_to_cpu(csum));
1773 return 0x01;
1774 }
1775 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION &&
1776 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
1777 pr_err("%s: REF check failed on sector %lu\n",
1778 __func__, (unsigned long)sector);
1779 return 0x03;
1780 }
1781 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
1782 be32_to_cpu(sdt->ref_tag) != ei_lba) {
1783 pr_err("%s: REF check failed on sector %lu\n",
1784 __func__, (unsigned long)sector);
1785 return 0x03;
1786 }
1787 return 0;
1788}
1789
1790static void dif_copy_prot(struct scsi_cmnd *SCpnt, sector_t sector,
1791 unsigned int sectors, bool read)
1792{
1793 size_t resid;
1794 void *paddr;
1795 const void *dif_store_end = dif_storep + sdebug_store_sectors;
1796 struct sg_mapping_iter miter;
1797
1798 /* Bytes of protection data to copy into sgl */
1799 resid = sectors * sizeof(*dif_storep);
1800
1801 sg_miter_start(&miter, scsi_prot_sglist(SCpnt),
1802 scsi_prot_sg_count(SCpnt), SG_MITER_ATOMIC |
1803 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
1804
1805 while (sg_miter_next(&miter) && resid > 0) {
1806 size_t len = min(miter.length, resid);
1807 void *start = dif_store(sector);
1808 size_t rest = 0;
1809
1810 if (dif_store_end < start + len)
1811 rest = start + len - dif_store_end;
1812
1813 paddr = miter.addr;
1814
1815 if (read)
1816 memcpy(paddr, start, len - rest);
1817 else
1818 memcpy(start, paddr, len - rest);
1819
1820 if (rest) {
1821 if (read)
1822 memcpy(paddr + len - rest, dif_storep, rest);
1823 else
1824 memcpy(dif_storep, paddr + len - rest, rest);
1825 }
1826
1827 sector += len / sizeof(*dif_storep);
1828 resid -= len;
1829 }
1830 sg_miter_stop(&miter);
1831}
1832
1833static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
1834 unsigned int sectors, u32 ei_lba)
1835{
1836 unsigned int i;
1837 struct sd_dif_tuple *sdt;
1838 sector_t sector;
1839
1840 for (i = 0; i < sectors; i++, ei_lba++) {
1841 int ret;
1842
1843 sector = start_sec + i;
1844 sdt = dif_store(sector);
1845
1846 if (sdt->app_tag == cpu_to_be16(0xffff))
1847 continue;
1848
1849 ret = dif_verify(sdt, fake_store(sector), sector, ei_lba);
1850 if (ret) {
1851 dif_errors++;
1852 return ret;
1853 }
1854 }
1855
1856 dif_copy_prot(SCpnt, start_sec, sectors, true);
1857 dix_reads++;
1858
1859 return 0;
1860}
1861
1862static int resp_read(struct scsi_cmnd *SCpnt, unsigned long long lba,
1863 unsigned int num, struct sdebug_dev_info *devip,
1864 u32 ei_lba)
1865{
1866 unsigned long iflags;
1867 int ret;
1868
1869 ret = check_device_access_params(devip, lba, num);
1870 if (ret)
1871 return ret;
1872
1873 if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) &&
1874 (lba <= (OPT_MEDIUM_ERR_ADDR + OPT_MEDIUM_ERR_NUM - 1)) &&
1875 ((lba + num) > OPT_MEDIUM_ERR_ADDR)) {
1876 /* claim unrecoverable read error */
1877 mk_sense_buffer(devip, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
1878 /* set info field and valid bit for fixed descriptor */
1879 if (0x70 == (devip->sense_buff[0] & 0x7f)) {
1880 devip->sense_buff[0] |= 0x80; /* Valid bit */
1881 ret = (lba < OPT_MEDIUM_ERR_ADDR)
1882 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
1883 devip->sense_buff[3] = (ret >> 24) & 0xff;
1884 devip->sense_buff[4] = (ret >> 16) & 0xff;
1885 devip->sense_buff[5] = (ret >> 8) & 0xff;
1886 devip->sense_buff[6] = ret & 0xff;
1887 }
1888 scsi_set_resid(SCpnt, scsi_bufflen(SCpnt));
1889 return check_condition_result;
1890 }
1891
1892 read_lock_irqsave(&atomic_rw, iflags);
1893
1894 /* DIX + T10 DIF */
1895 if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
1896 int prot_ret = prot_verify_read(SCpnt, lba, num, ei_lba);
1897
1898 if (prot_ret) {
1899 read_unlock_irqrestore(&atomic_rw, iflags);
1900 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, prot_ret);
1901 return illegal_condition_result;
1902 }
1903 }
1904
1905 ret = do_device_access(SCpnt, devip, lba, num, 0);
1906 read_unlock_irqrestore(&atomic_rw, iflags);
1907 if (ret == -1)
1908 return DID_ERROR << 16;
1909
1910 scsi_in(SCpnt)->resid = scsi_bufflen(SCpnt) - ret;
1911
1912 return 0;
1913}
1914
1915void dump_sector(unsigned char *buf, int len)
1916{
1917 int i, j;
1918
1919 printk(KERN_ERR ">>> Sector Dump <<<\n");
1920
1921 for (i = 0 ; i < len ; i += 16) {
1922 printk(KERN_ERR "%04d: ", i);
1923
1924 for (j = 0 ; j < 16 ; j++) {
1925 unsigned char c = buf[i+j];
1926 if (c >= 0x20 && c < 0x7e)
1927 printk(" %c ", buf[i+j]);
1928 else
1929 printk("%02x ", buf[i+j]);
1930 }
1931
1932 printk("\n");
1933 }
1934}
1935
1936static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
1937 unsigned int sectors, u32 ei_lba)
1938{
1939 int ret;
1940 struct sd_dif_tuple *sdt;
1941 void *daddr;
1942 sector_t sector = start_sec;
1943 int ppage_offset;
1944 int dpage_offset;
1945 struct sg_mapping_iter diter;
1946 struct sg_mapping_iter piter;
1947
1948 BUG_ON(scsi_sg_count(SCpnt) == 0);
1949 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
1950
1951 sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
1952 scsi_prot_sg_count(SCpnt),
1953 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
1954 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
1955 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
1956
1957 /* For each protection page */
1958 while (sg_miter_next(&piter)) {
1959 dpage_offset = 0;
1960 if (WARN_ON(!sg_miter_next(&diter))) {
1961 ret = 0x01;
1962 goto out;
1963 }
1964
1965 for (ppage_offset = 0; ppage_offset < piter.length;
1966 ppage_offset += sizeof(struct sd_dif_tuple)) {
1967 /* If we're at the end of the current
1968 * data page advance to the next one
1969 */
1970 if (dpage_offset >= diter.length) {
1971 if (WARN_ON(!sg_miter_next(&diter))) {
1972 ret = 0x01;
1973 goto out;
1974 }
1975 dpage_offset = 0;
1976 }
1977
1978 sdt = piter.addr + ppage_offset;
1979 daddr = diter.addr + dpage_offset;
1980
1981 ret = dif_verify(sdt, daddr, sector, ei_lba);
1982 if (ret) {
1983 dump_sector(daddr, scsi_debug_sector_size);
1984 goto out;
1985 }
1986
1987 sector++;
1988 ei_lba++;
1989 dpage_offset += scsi_debug_sector_size;
1990 }
1991 diter.consumed = dpage_offset;
1992 sg_miter_stop(&diter);
1993 }
1994 sg_miter_stop(&piter);
1995
1996 dif_copy_prot(SCpnt, start_sec, sectors, false);
1997 dix_writes++;
1998
1999 return 0;
2000
2001out:
2002 dif_errors++;
2003 sg_miter_stop(&diter);
2004 sg_miter_stop(&piter);
2005 return ret;
2006}
2007
2008static unsigned long lba_to_map_index(sector_t lba)
2009{
2010 if (scsi_debug_unmap_alignment) {
2011 lba += scsi_debug_unmap_granularity -
2012 scsi_debug_unmap_alignment;
2013 }
2014 do_div(lba, scsi_debug_unmap_granularity);
2015
2016 return lba;
2017}
2018
2019static sector_t map_index_to_lba(unsigned long index)
2020{
2021 sector_t lba = index * scsi_debug_unmap_granularity;
2022
2023 if (scsi_debug_unmap_alignment) {
2024 lba -= scsi_debug_unmap_granularity -
2025 scsi_debug_unmap_alignment;
2026 }
2027
2028 return lba;
2029}
2030
2031static unsigned int map_state(sector_t lba, unsigned int *num)
2032{
2033 sector_t end;
2034 unsigned int mapped;
2035 unsigned long index;
2036 unsigned long next;
2037
2038 index = lba_to_map_index(lba);
2039 mapped = test_bit(index, map_storep);
2040
2041 if (mapped)
2042 next = find_next_zero_bit(map_storep, map_size, index);
2043 else
2044 next = find_next_bit(map_storep, map_size, index);
2045
2046 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
2047 *num = end - lba;
2048
2049 return mapped;
2050}
2051
2052static void map_region(sector_t lba, unsigned int len)
2053{
2054 sector_t end = lba + len;
2055
2056 while (lba < end) {
2057 unsigned long index = lba_to_map_index(lba);
2058
2059 if (index < map_size)
2060 set_bit(index, map_storep);
2061
2062 lba = map_index_to_lba(index + 1);
2063 }
2064}
2065
2066static void unmap_region(sector_t lba, unsigned int len)
2067{
2068 sector_t end = lba + len;
2069
2070 while (lba < end) {
2071 unsigned long index = lba_to_map_index(lba);
2072
2073 if (lba == map_index_to_lba(index) &&
2074 lba + scsi_debug_unmap_granularity <= end &&
2075 index < map_size) {
2076 clear_bit(index, map_storep);
2077 if (scsi_debug_lbprz) {
2078 memset(fake_storep +
2079 lba * scsi_debug_sector_size, 0,
2080 scsi_debug_sector_size *
2081 scsi_debug_unmap_granularity);
2082 }
2083 if (dif_storep) {
2084 memset(dif_storep + lba, 0xff,
2085 sizeof(*dif_storep) *
2086 scsi_debug_unmap_granularity);
2087 }
2088 }
2089 lba = map_index_to_lba(index + 1);
2090 }
2091}
2092
2093static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba,
2094 unsigned int num, struct sdebug_dev_info *devip,
2095 u32 ei_lba)
2096{
2097 unsigned long iflags;
2098 int ret;
2099
2100 ret = check_device_access_params(devip, lba, num);
2101 if (ret)
2102 return ret;
2103
2104 write_lock_irqsave(&atomic_rw, iflags);
2105
2106 /* DIX + T10 DIF */
2107 if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
2108 int prot_ret = prot_verify_write(SCpnt, lba, num, ei_lba);
2109
2110 if (prot_ret) {
2111 write_unlock_irqrestore(&atomic_rw, iflags);
2112 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, prot_ret);
2113 return illegal_condition_result;
2114 }
2115 }
2116
2117 ret = do_device_access(SCpnt, devip, lba, num, 1);
2118 if (scsi_debug_lbp())
2119 map_region(lba, num);
2120 write_unlock_irqrestore(&atomic_rw, iflags);
2121 if (-1 == ret)
2122 return (DID_ERROR << 16);
2123 else if ((ret < (num * scsi_debug_sector_size)) &&
2124 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2125 printk(KERN_INFO "scsi_debug: write: cdb indicated=%u, "
2126 " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret);
2127
2128 return 0;
2129}
2130
2131static int resp_write_same(struct scsi_cmnd *scmd, unsigned long long lba,
2132 unsigned int num, struct sdebug_dev_info *devip,
2133 u32 ei_lba, unsigned int unmap)
2134{
2135 unsigned long iflags;
2136 unsigned long long i;
2137 int ret;
2138
2139 ret = check_device_access_params(devip, lba, num);
2140 if (ret)
2141 return ret;
2142
2143 if (num > scsi_debug_write_same_length) {
2144 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
2145 0);
2146 return check_condition_result;
2147 }
2148
2149 write_lock_irqsave(&atomic_rw, iflags);
2150
2151 if (unmap && scsi_debug_lbp()) {
2152 unmap_region(lba, num);
2153 goto out;
2154 }
2155
2156 /* Else fetch one logical block */
2157 ret = fetch_to_dev_buffer(scmd,
2158 fake_storep + (lba * scsi_debug_sector_size),
2159 scsi_debug_sector_size);
2160
2161 if (-1 == ret) {
2162 write_unlock_irqrestore(&atomic_rw, iflags);
2163 return (DID_ERROR << 16);
2164 } else if ((ret < (num * scsi_debug_sector_size)) &&
2165 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2166 printk(KERN_INFO "scsi_debug: write same: cdb indicated=%u, "
2167 " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret);
2168
2169 /* Copy first sector to remaining blocks */
2170 for (i = 1 ; i < num ; i++)
2171 memcpy(fake_storep + ((lba + i) * scsi_debug_sector_size),
2172 fake_storep + (lba * scsi_debug_sector_size),
2173 scsi_debug_sector_size);
2174
2175 if (scsi_debug_lbp())
2176 map_region(lba, num);
2177out:
2178 write_unlock_irqrestore(&atomic_rw, iflags);
2179
2180 return 0;
2181}
2182
2183struct unmap_block_desc {
2184 __be64 lba;
2185 __be32 blocks;
2186 __be32 __reserved;
2187};
2188
2189static int resp_unmap(struct scsi_cmnd * scmd, struct sdebug_dev_info * devip)
2190{
2191 unsigned char *buf;
2192 struct unmap_block_desc *desc;
2193 unsigned int i, payload_len, descriptors;
2194 int ret;
2195 unsigned long iflags;
2196
2197 ret = check_readiness(scmd, 1, devip);
2198 if (ret)
2199 return ret;
2200
2201 payload_len = get_unaligned_be16(&scmd->cmnd[7]);
2202 BUG_ON(scsi_bufflen(scmd) != payload_len);
2203
2204 descriptors = (payload_len - 8) / 16;
2205
2206 buf = kmalloc(scsi_bufflen(scmd), GFP_ATOMIC);
2207 if (!buf)
2208 return check_condition_result;
2209
2210 scsi_sg_copy_to_buffer(scmd, buf, scsi_bufflen(scmd));
2211
2212 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
2213 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
2214
2215 desc = (void *)&buf[8];
2216
2217 write_lock_irqsave(&atomic_rw, iflags);
2218
2219 for (i = 0 ; i < descriptors ; i++) {
2220 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
2221 unsigned int num = get_unaligned_be32(&desc[i].blocks);
2222
2223 ret = check_device_access_params(devip, lba, num);
2224 if (ret)
2225 goto out;
2226
2227 unmap_region(lba, num);
2228 }
2229
2230 ret = 0;
2231
2232out:
2233 write_unlock_irqrestore(&atomic_rw, iflags);
2234 kfree(buf);
2235
2236 return ret;
2237}
2238
2239#define SDEBUG_GET_LBA_STATUS_LEN 32
2240
2241static int resp_get_lba_status(struct scsi_cmnd * scmd,
2242 struct sdebug_dev_info * devip)
2243{
2244 unsigned long long lba;
2245 unsigned int alloc_len, mapped, num;
2246 unsigned char arr[SDEBUG_GET_LBA_STATUS_LEN];
2247 int ret;
2248
2249 ret = check_readiness(scmd, 1, devip);
2250 if (ret)
2251 return ret;
2252
2253 lba = get_unaligned_be64(&scmd->cmnd[2]);
2254 alloc_len = get_unaligned_be32(&scmd->cmnd[10]);
2255
2256 if (alloc_len < 24)
2257 return 0;
2258
2259 ret = check_device_access_params(devip, lba, 1);
2260 if (ret)
2261 return ret;
2262
2263 mapped = map_state(lba, &num);
2264
2265 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
2266 put_unaligned_be32(20, &arr[0]); /* Parameter Data Length */
2267 put_unaligned_be64(lba, &arr[8]); /* LBA */
2268 put_unaligned_be32(num, &arr[16]); /* Number of blocks */
2269 arr[20] = !mapped; /* mapped = 0, unmapped = 1 */
2270
2271 return fill_from_dev_buffer(scmd, arr, SDEBUG_GET_LBA_STATUS_LEN);
2272}
2273
2274#define SDEBUG_RLUN_ARR_SZ 256
2275
2276static int resp_report_luns(struct scsi_cmnd * scp,
2277 struct sdebug_dev_info * devip)
2278{
2279 unsigned int alloc_len;
2280 int lun_cnt, i, upper, num, n, wlun, lun;
2281 unsigned char *cmd = (unsigned char *)scp->cmnd;
2282 int select_report = (int)cmd[2];
2283 struct scsi_lun *one_lun;
2284 unsigned char arr[SDEBUG_RLUN_ARR_SZ];
2285 unsigned char * max_addr;
2286
2287 alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
2288 if ((alloc_len < 4) || (select_report > 2)) {
2289 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
2290 0);
2291 return check_condition_result;
2292 }
2293 /* can produce response with up to 16k luns (lun 0 to lun 16383) */
2294 memset(arr, 0, SDEBUG_RLUN_ARR_SZ);
2295 lun_cnt = scsi_debug_max_luns;
2296 if (1 == select_report)
2297 lun_cnt = 0;
2298 else if (scsi_debug_no_lun_0 && (lun_cnt > 0))
2299 --lun_cnt;
2300 wlun = (select_report > 0) ? 1 : 0;
2301 num = lun_cnt + wlun;
2302 arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff;
2303 arr[3] = (sizeof(struct scsi_lun) * num) & 0xff;
2304 n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) /
2305 sizeof(struct scsi_lun)), num);
2306 if (n < num) {
2307 wlun = 0;
2308 lun_cnt = n;
2309 }
2310 one_lun = (struct scsi_lun *) &arr[8];
2311 max_addr = arr + SDEBUG_RLUN_ARR_SZ;
2312 for (i = 0, lun = (scsi_debug_no_lun_0 ? 1 : 0);
2313 ((i < lun_cnt) && ((unsigned char *)(one_lun + i) < max_addr));
2314 i++, lun++) {
2315 upper = (lun >> 8) & 0x3f;
2316 if (upper)
2317 one_lun[i].scsi_lun[0] =
2318 (upper | (SAM2_LUN_ADDRESS_METHOD << 6));
2319 one_lun[i].scsi_lun[1] = lun & 0xff;
2320 }
2321 if (wlun) {
2322 one_lun[i].scsi_lun[0] = (SAM2_WLUN_REPORT_LUNS >> 8) & 0xff;
2323 one_lun[i].scsi_lun[1] = SAM2_WLUN_REPORT_LUNS & 0xff;
2324 i++;
2325 }
2326 alloc_len = (unsigned char *)(one_lun + i) - arr;
2327 return fill_from_dev_buffer(scp, arr,
2328 min((int)alloc_len, SDEBUG_RLUN_ARR_SZ));
2329}
2330
2331static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
2332 unsigned int num, struct sdebug_dev_info *devip)
2333{
2334 int j;
2335 unsigned char *kaddr, *buf;
2336 unsigned int offset;
2337 struct scsi_data_buffer *sdb = scsi_in(scp);
2338 struct sg_mapping_iter miter;
2339
2340 /* better not to use temporary buffer. */
2341 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
2342 if (!buf) {
2343 mk_sense_buffer(devip, NOT_READY,
2344 LOGICAL_UNIT_COMMUNICATION_FAILURE, 0);
2345 return check_condition_result;
2346 }
2347
2348 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
2349
2350 offset = 0;
2351 sg_miter_start(&miter, sdb->table.sgl, sdb->table.nents,
2352 SG_MITER_ATOMIC | SG_MITER_TO_SG);
2353
2354 while (sg_miter_next(&miter)) {
2355 kaddr = miter.addr;
2356 for (j = 0; j < miter.length; j++)
2357 *(kaddr + j) ^= *(buf + offset + j);
2358
2359 offset += miter.length;
2360 }
2361 sg_miter_stop(&miter);
2362 kfree(buf);
2363
2364 return 0;
2365}
2366
2367/* When timer goes off this function is called. */
2368static void timer_intr_handler(unsigned long indx)
2369{
2370 struct sdebug_queued_cmd * sqcp;
2371 unsigned long iflags;
2372
2373 if (indx >= scsi_debug_max_queue) {
2374 printk(KERN_ERR "scsi_debug:timer_intr_handler: indx too "
2375 "large\n");
2376 return;
2377 }
2378 spin_lock_irqsave(&queued_arr_lock, iflags);
2379 sqcp = &queued_arr[(int)indx];
2380 if (! sqcp->in_use) {
2381 printk(KERN_ERR "scsi_debug:timer_intr_handler: Unexpected "
2382 "interrupt\n");
2383 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2384 return;
2385 }
2386 sqcp->in_use = 0;
2387 if (sqcp->done_funct) {
2388 sqcp->a_cmnd->result = sqcp->scsi_result;
2389 sqcp->done_funct(sqcp->a_cmnd); /* callback to mid level */
2390 }
2391 sqcp->done_funct = NULL;
2392 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2393}
2394
2395
2396static struct sdebug_dev_info *
2397sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags)
2398{
2399 struct sdebug_dev_info *devip;
2400
2401 devip = kzalloc(sizeof(*devip), flags);
2402 if (devip) {
2403 devip->sdbg_host = sdbg_host;
2404 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
2405 }
2406 return devip;
2407}
2408
2409static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev)
2410{
2411 struct sdebug_host_info * sdbg_host;
2412 struct sdebug_dev_info * open_devip = NULL;
2413 struct sdebug_dev_info * devip =
2414 (struct sdebug_dev_info *)sdev->hostdata;
2415
2416 if (devip)
2417 return devip;
2418 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
2419 if (!sdbg_host) {
2420 printk(KERN_ERR "Host info NULL\n");
2421 return NULL;
2422 }
2423 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
2424 if ((devip->used) && (devip->channel == sdev->channel) &&
2425 (devip->target == sdev->id) &&
2426 (devip->lun == sdev->lun))
2427 return devip;
2428 else {
2429 if ((!devip->used) && (!open_devip))
2430 open_devip = devip;
2431 }
2432 }
2433 if (!open_devip) { /* try and make a new one */
2434 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
2435 if (!open_devip) {
2436 printk(KERN_ERR "%s: out of memory at line %d\n",
2437 __func__, __LINE__);
2438 return NULL;
2439 }
2440 }
2441
2442 open_devip->channel = sdev->channel;
2443 open_devip->target = sdev->id;
2444 open_devip->lun = sdev->lun;
2445 open_devip->sdbg_host = sdbg_host;
2446 open_devip->reset = 1;
2447 open_devip->used = 1;
2448 memset(open_devip->sense_buff, 0, SDEBUG_SENSE_LEN);
2449 if (scsi_debug_dsense)
2450 open_devip->sense_buff[0] = 0x72;
2451 else {
2452 open_devip->sense_buff[0] = 0x70;
2453 open_devip->sense_buff[7] = 0xa;
2454 }
2455 if (sdev->lun == SAM2_WLUN_REPORT_LUNS)
2456 open_devip->wlun = SAM2_WLUN_REPORT_LUNS & 0xff;
2457
2458 return open_devip;
2459}
2460
2461static int scsi_debug_slave_alloc(struct scsi_device *sdp)
2462{
2463 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2464 printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %u>\n",
2465 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
2466 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue);
2467 return 0;
2468}
2469
2470static int scsi_debug_slave_configure(struct scsi_device *sdp)
2471{
2472 struct sdebug_dev_info *devip;
2473
2474 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2475 printk(KERN_INFO "scsi_debug: slave_configure <%u %u %u %u>\n",
2476 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
2477 if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN)
2478 sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN;
2479 devip = devInfoReg(sdp);
2480 if (NULL == devip)
2481 return 1; /* no resources, will be marked offline */
2482 sdp->hostdata = devip;
2483 if (sdp->host->cmd_per_lun)
2484 scsi_adjust_queue_depth(sdp, SDEBUG_TAGGED_QUEUING,
2485 sdp->host->cmd_per_lun);
2486 blk_queue_max_segment_size(sdp->request_queue, 256 * 1024);
2487 if (scsi_debug_no_uld)
2488 sdp->no_uld_attach = 1;
2489 return 0;
2490}
2491
2492static void scsi_debug_slave_destroy(struct scsi_device *sdp)
2493{
2494 struct sdebug_dev_info *devip =
2495 (struct sdebug_dev_info *)sdp->hostdata;
2496
2497 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2498 printk(KERN_INFO "scsi_debug: slave_destroy <%u %u %u %u>\n",
2499 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
2500 if (devip) {
2501 /* make this slot available for re-use */
2502 devip->used = 0;
2503 sdp->hostdata = NULL;
2504 }
2505}
2506
2507/* Returns 1 if found 'cmnd' and deleted its timer. else returns 0 */
2508static int stop_queued_cmnd(struct scsi_cmnd *cmnd)
2509{
2510 unsigned long iflags;
2511 int k;
2512 struct sdebug_queued_cmd *sqcp;
2513
2514 spin_lock_irqsave(&queued_arr_lock, iflags);
2515 for (k = 0; k < scsi_debug_max_queue; ++k) {
2516 sqcp = &queued_arr[k];
2517 if (sqcp->in_use && (cmnd == sqcp->a_cmnd)) {
2518 del_timer_sync(&sqcp->cmnd_timer);
2519 sqcp->in_use = 0;
2520 sqcp->a_cmnd = NULL;
2521 break;
2522 }
2523 }
2524 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2525 return (k < scsi_debug_max_queue) ? 1 : 0;
2526}
2527
2528/* Deletes (stops) timers of all queued commands */
2529static void stop_all_queued(void)
2530{
2531 unsigned long iflags;
2532 int k;
2533 struct sdebug_queued_cmd *sqcp;
2534
2535 spin_lock_irqsave(&queued_arr_lock, iflags);
2536 for (k = 0; k < scsi_debug_max_queue; ++k) {
2537 sqcp = &queued_arr[k];
2538 if (sqcp->in_use && sqcp->a_cmnd) {
2539 del_timer_sync(&sqcp->cmnd_timer);
2540 sqcp->in_use = 0;
2541 sqcp->a_cmnd = NULL;
2542 }
2543 }
2544 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2545}
2546
2547static int scsi_debug_abort(struct scsi_cmnd * SCpnt)
2548{
2549 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2550 printk(KERN_INFO "scsi_debug: abort\n");
2551 ++num_aborts;
2552 stop_queued_cmnd(SCpnt);
2553 return SUCCESS;
2554}
2555
2556static int scsi_debug_biosparam(struct scsi_device *sdev,
2557 struct block_device * bdev, sector_t capacity, int *info)
2558{
2559 int res;
2560 unsigned char *buf;
2561
2562 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2563 printk(KERN_INFO "scsi_debug: biosparam\n");
2564 buf = scsi_bios_ptable(bdev);
2565 if (buf) {
2566 res = scsi_partsize(buf, capacity,
2567 &info[2], &info[0], &info[1]);
2568 kfree(buf);
2569 if (! res)
2570 return res;
2571 }
2572 info[0] = sdebug_heads;
2573 info[1] = sdebug_sectors_per;
2574 info[2] = sdebug_cylinders_per;
2575 return 0;
2576}
2577
2578static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
2579{
2580 struct sdebug_dev_info * devip;
2581
2582 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2583 printk(KERN_INFO "scsi_debug: device_reset\n");
2584 ++num_dev_resets;
2585 if (SCpnt) {
2586 devip = devInfoReg(SCpnt->device);
2587 if (devip)
2588 devip->reset = 1;
2589 }
2590 return SUCCESS;
2591}
2592
2593static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
2594{
2595 struct sdebug_host_info *sdbg_host;
2596 struct sdebug_dev_info * dev_info;
2597 struct scsi_device * sdp;
2598 struct Scsi_Host * hp;
2599
2600 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2601 printk(KERN_INFO "scsi_debug: bus_reset\n");
2602 ++num_bus_resets;
2603 if (SCpnt && ((sdp = SCpnt->device)) && ((hp = sdp->host))) {
2604 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
2605 if (sdbg_host) {
2606 list_for_each_entry(dev_info,
2607 &sdbg_host->dev_info_list,
2608 dev_list)
2609 dev_info->reset = 1;
2610 }
2611 }
2612 return SUCCESS;
2613}
2614
2615static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
2616{
2617 struct sdebug_host_info * sdbg_host;
2618 struct sdebug_dev_info * dev_info;
2619
2620 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2621 printk(KERN_INFO "scsi_debug: host_reset\n");
2622 ++num_host_resets;
2623 spin_lock(&sdebug_host_list_lock);
2624 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
2625 list_for_each_entry(dev_info, &sdbg_host->dev_info_list,
2626 dev_list)
2627 dev_info->reset = 1;
2628 }
2629 spin_unlock(&sdebug_host_list_lock);
2630 stop_all_queued();
2631 return SUCCESS;
2632}
2633
2634/* Initializes timers in queued array */
2635static void __init init_all_queued(void)
2636{
2637 unsigned long iflags;
2638 int k;
2639 struct sdebug_queued_cmd * sqcp;
2640
2641 spin_lock_irqsave(&queued_arr_lock, iflags);
2642 for (k = 0; k < scsi_debug_max_queue; ++k) {
2643 sqcp = &queued_arr[k];
2644 init_timer(&sqcp->cmnd_timer);
2645 sqcp->in_use = 0;
2646 sqcp->a_cmnd = NULL;
2647 }
2648 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2649}
2650
2651static void __init sdebug_build_parts(unsigned char *ramp,
2652 unsigned long store_size)
2653{
2654 struct partition * pp;
2655 int starts[SDEBUG_MAX_PARTS + 2];
2656 int sectors_per_part, num_sectors, k;
2657 int heads_by_sects, start_sec, end_sec;
2658
2659 /* assume partition table already zeroed */
2660 if ((scsi_debug_num_parts < 1) || (store_size < 1048576))
2661 return;
2662 if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) {
2663 scsi_debug_num_parts = SDEBUG_MAX_PARTS;
2664 printk(KERN_WARNING "scsi_debug:build_parts: reducing "
2665 "partitions to %d\n", SDEBUG_MAX_PARTS);
2666 }
2667 num_sectors = (int)sdebug_store_sectors;
2668 sectors_per_part = (num_sectors - sdebug_sectors_per)
2669 / scsi_debug_num_parts;
2670 heads_by_sects = sdebug_heads * sdebug_sectors_per;
2671 starts[0] = sdebug_sectors_per;
2672 for (k = 1; k < scsi_debug_num_parts; ++k)
2673 starts[k] = ((k * sectors_per_part) / heads_by_sects)
2674 * heads_by_sects;
2675 starts[scsi_debug_num_parts] = num_sectors;
2676 starts[scsi_debug_num_parts + 1] = 0;
2677
2678 ramp[510] = 0x55; /* magic partition markings */
2679 ramp[511] = 0xAA;
2680 pp = (struct partition *)(ramp + 0x1be);
2681 for (k = 0; starts[k + 1]; ++k, ++pp) {
2682 start_sec = starts[k];
2683 end_sec = starts[k + 1] - 1;
2684 pp->boot_ind = 0;
2685
2686 pp->cyl = start_sec / heads_by_sects;
2687 pp->head = (start_sec - (pp->cyl * heads_by_sects))
2688 / sdebug_sectors_per;
2689 pp->sector = (start_sec % sdebug_sectors_per) + 1;
2690
2691 pp->end_cyl = end_sec / heads_by_sects;
2692 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
2693 / sdebug_sectors_per;
2694 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
2695
2696 pp->start_sect = cpu_to_le32(start_sec);
2697 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
2698 pp->sys_ind = 0x83; /* plain Linux partition */
2699 }
2700}
2701
2702static int schedule_resp(struct scsi_cmnd * cmnd,
2703 struct sdebug_dev_info * devip,
2704 done_funct_t done, int scsi_result, int delta_jiff)
2705{
2706 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmnd) {
2707 if (scsi_result) {
2708 struct scsi_device * sdp = cmnd->device;
2709
2710 printk(KERN_INFO "scsi_debug: <%u %u %u %u> "
2711 "non-zero result=0x%x\n", sdp->host->host_no,
2712 sdp->channel, sdp->id, sdp->lun, scsi_result);
2713 }
2714 }
2715 if (cmnd && devip) {
2716 /* simulate autosense by this driver */
2717 if (SAM_STAT_CHECK_CONDITION == (scsi_result & 0xff))
2718 memcpy(cmnd->sense_buffer, devip->sense_buff,
2719 (SCSI_SENSE_BUFFERSIZE > SDEBUG_SENSE_LEN) ?
2720 SDEBUG_SENSE_LEN : SCSI_SENSE_BUFFERSIZE);
2721 }
2722 if (delta_jiff <= 0) {
2723 if (cmnd)
2724 cmnd->result = scsi_result;
2725 if (done)
2726 done(cmnd);
2727 return 0;
2728 } else {
2729 unsigned long iflags;
2730 int k;
2731 struct sdebug_queued_cmd * sqcp = NULL;
2732
2733 spin_lock_irqsave(&queued_arr_lock, iflags);
2734 for (k = 0; k < scsi_debug_max_queue; ++k) {
2735 sqcp = &queued_arr[k];
2736 if (! sqcp->in_use)
2737 break;
2738 }
2739 if (k >= scsi_debug_max_queue) {
2740 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2741 printk(KERN_WARNING "scsi_debug: can_queue exceeded\n");
2742 return 1; /* report busy to mid level */
2743 }
2744 sqcp->in_use = 1;
2745 sqcp->a_cmnd = cmnd;
2746 sqcp->scsi_result = scsi_result;
2747 sqcp->done_funct = done;
2748 sqcp->cmnd_timer.function = timer_intr_handler;
2749 sqcp->cmnd_timer.data = k;
2750 sqcp->cmnd_timer.expires = jiffies + delta_jiff;
2751 add_timer(&sqcp->cmnd_timer);
2752 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2753 if (cmnd)
2754 cmnd->result = 0;
2755 return 0;
2756 }
2757}
2758/* Note: The following macros create attribute files in the
2759 /sys/module/scsi_debug/parameters directory. Unfortunately this
2760 driver is unaware of a change and cannot trigger auxiliary actions
2761 as it can when the corresponding attribute in the
2762 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
2763 */
2764module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR);
2765module_param_named(ato, scsi_debug_ato, int, S_IRUGO);
2766module_param_named(clustering, scsi_debug_clustering, bool, S_IRUGO | S_IWUSR);
2767module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR);
2768module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO);
2769module_param_named(dif, scsi_debug_dif, int, S_IRUGO);
2770module_param_named(dix, scsi_debug_dix, int, S_IRUGO);
2771module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR);
2772module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR);
2773module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR);
2774module_param_named(guard, scsi_debug_guard, uint, S_IRUGO);
2775module_param_named(lbpu, scsi_debug_lbpu, int, S_IRUGO);
2776module_param_named(lbpws, scsi_debug_lbpws, int, S_IRUGO);
2777module_param_named(lbpws10, scsi_debug_lbpws10, int, S_IRUGO);
2778module_param_named(lbprz, scsi_debug_lbprz, int, S_IRUGO);
2779module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO);
2780module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR);
2781module_param_named(max_queue, scsi_debug_max_queue, int, S_IRUGO | S_IWUSR);
2782module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR);
2783module_param_named(no_uld, scsi_debug_no_uld, int, S_IRUGO);
2784module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO);
2785module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR);
2786module_param_named(opt_blks, scsi_debug_opt_blks, int, S_IRUGO);
2787module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR);
2788module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO);
2789module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR);
2790module_param_named(removable, scsi_debug_removable, bool, S_IRUGO | S_IWUSR);
2791module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO);
2792module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO);
2793module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO);
2794module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO);
2795module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO);
2796module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, int, S_IRUGO);
2797module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR);
2798module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int,
2799 S_IRUGO | S_IWUSR);
2800module_param_named(write_same_length, scsi_debug_write_same_length, int,
2801 S_IRUGO | S_IWUSR);
2802
2803MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
2804MODULE_DESCRIPTION("SCSI debug adapter driver");
2805MODULE_LICENSE("GPL");
2806MODULE_VERSION(SCSI_DEBUG_VERSION);
2807
2808MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
2809MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
2810MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
2811MODULE_PARM_DESC(delay, "# of jiffies to delay response(def=1)");
2812MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs(def=8)");
2813MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
2814MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
2815MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
2816MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
2817MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
2818MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
2819MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
2820MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
2821MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
2822MODULE_PARM_DESC(lbprz, "unmapped blocks return 0 on read (def=1)");
2823MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
2824MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
2825MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to 255(def))");
2826MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
2827MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
2828MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
2829MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
2830MODULE_PARM_DESC(opt_blks, "optimal transfer length in block (def=64)");
2831MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
2832MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
2833MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
2834MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
2835MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])");
2836MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
2837MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
2838MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
2839MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
2840MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
2841MODULE_PARM_DESC(virtual_gb, "virtual gigabyte size (def=0 -> use dev_size_mb)");
2842MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
2843MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
2844
2845static char sdebug_info[256];
2846
2847static const char * scsi_debug_info(struct Scsi_Host * shp)
2848{
2849 sprintf(sdebug_info, "scsi_debug, version %s [%s], "
2850 "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION,
2851 scsi_debug_version_date, scsi_debug_dev_size_mb,
2852 scsi_debug_opts);
2853 return sdebug_info;
2854}
2855
2856/* scsi_debug_proc_info
2857 * Used if the driver currently has no own support for /proc/scsi
2858 */
2859static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer, int length)
2860{
2861 char arr[16];
2862 int opts;
2863 int minLen = length > 15 ? 15 : length;
2864
2865 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
2866 return -EACCES;
2867 memcpy(arr, buffer, minLen);
2868 arr[minLen] = '\0';
2869 if (1 != sscanf(arr, "%d", &opts))
2870 return -EINVAL;
2871 scsi_debug_opts = opts;
2872 if (scsi_debug_every_nth != 0)
2873 scsi_debug_cmnd_count = 0;
2874 return length;
2875}
2876
2877static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
2878{
2879 seq_printf(m, "scsi_debug adapter driver, version "
2880 "%s [%s]\n"
2881 "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, "
2882 "every_nth=%d(curr:%d)\n"
2883 "delay=%d, max_luns=%d, scsi_level=%d\n"
2884 "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n"
2885 "number of aborts=%d, device_reset=%d, bus_resets=%d, "
2886 "host_resets=%d\ndix_reads=%d dix_writes=%d dif_errors=%d\n",
2887 SCSI_DEBUG_VERSION, scsi_debug_version_date, scsi_debug_num_tgts,
2888 scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth,
2889 scsi_debug_cmnd_count, scsi_debug_delay,
2890 scsi_debug_max_luns, scsi_debug_scsi_level,
2891 scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads,
2892 sdebug_sectors_per, num_aborts, num_dev_resets, num_bus_resets,
2893 num_host_resets, dix_reads, dix_writes, dif_errors);
2894 return 0;
2895}
2896
2897static ssize_t delay_show(struct device_driver *ddp, char *buf)
2898{
2899 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay);
2900}
2901
2902static ssize_t delay_store(struct device_driver *ddp, const char *buf,
2903 size_t count)
2904{
2905 int delay;
2906 char work[20];
2907
2908 if (1 == sscanf(buf, "%10s", work)) {
2909 if ((1 == sscanf(work, "%d", &delay)) && (delay >= 0)) {
2910 scsi_debug_delay = delay;
2911 return count;
2912 }
2913 }
2914 return -EINVAL;
2915}
2916static DRIVER_ATTR_RW(delay);
2917
2918static ssize_t opts_show(struct device_driver *ddp, char *buf)
2919{
2920 return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts);
2921}
2922
2923static ssize_t opts_store(struct device_driver *ddp, const char *buf,
2924 size_t count)
2925{
2926 int opts;
2927 char work[20];
2928
2929 if (1 == sscanf(buf, "%10s", work)) {
2930 if (0 == strnicmp(work,"0x", 2)) {
2931 if (1 == sscanf(&work[2], "%x", &opts))
2932 goto opts_done;
2933 } else {
2934 if (1 == sscanf(work, "%d", &opts))
2935 goto opts_done;
2936 }
2937 }
2938 return -EINVAL;
2939opts_done:
2940 scsi_debug_opts = opts;
2941 scsi_debug_cmnd_count = 0;
2942 return count;
2943}
2944static DRIVER_ATTR_RW(opts);
2945
2946static ssize_t ptype_show(struct device_driver *ddp, char *buf)
2947{
2948 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype);
2949}
2950static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
2951 size_t count)
2952{
2953 int n;
2954
2955 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2956 scsi_debug_ptype = n;
2957 return count;
2958 }
2959 return -EINVAL;
2960}
2961static DRIVER_ATTR_RW(ptype);
2962
2963static ssize_t dsense_show(struct device_driver *ddp, char *buf)
2964{
2965 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense);
2966}
2967static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
2968 size_t count)
2969{
2970 int n;
2971
2972 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2973 scsi_debug_dsense = n;
2974 return count;
2975 }
2976 return -EINVAL;
2977}
2978static DRIVER_ATTR_RW(dsense);
2979
2980static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
2981{
2982 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw);
2983}
2984static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
2985 size_t count)
2986{
2987 int n;
2988
2989 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2990 scsi_debug_fake_rw = n;
2991 return count;
2992 }
2993 return -EINVAL;
2994}
2995static DRIVER_ATTR_RW(fake_rw);
2996
2997static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
2998{
2999 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0);
3000}
3001static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
3002 size_t count)
3003{
3004 int n;
3005
3006 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3007 scsi_debug_no_lun_0 = n;
3008 return count;
3009 }
3010 return -EINVAL;
3011}
3012static DRIVER_ATTR_RW(no_lun_0);
3013
3014static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
3015{
3016 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts);
3017}
3018static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
3019 size_t count)
3020{
3021 int n;
3022
3023 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3024 scsi_debug_num_tgts = n;
3025 sdebug_max_tgts_luns();
3026 return count;
3027 }
3028 return -EINVAL;
3029}
3030static DRIVER_ATTR_RW(num_tgts);
3031
3032static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
3033{
3034 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb);
3035}
3036static DRIVER_ATTR_RO(dev_size_mb);
3037
3038static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
3039{
3040 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts);
3041}
3042static DRIVER_ATTR_RO(num_parts);
3043
3044static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
3045{
3046 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth);
3047}
3048static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
3049 size_t count)
3050{
3051 int nth;
3052
3053 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
3054 scsi_debug_every_nth = nth;
3055 scsi_debug_cmnd_count = 0;
3056 return count;
3057 }
3058 return -EINVAL;
3059}
3060static DRIVER_ATTR_RW(every_nth);
3061
3062static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
3063{
3064 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns);
3065}
3066static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
3067 size_t count)
3068{
3069 int n;
3070
3071 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3072 scsi_debug_max_luns = n;
3073 sdebug_max_tgts_luns();
3074 return count;
3075 }
3076 return -EINVAL;
3077}
3078static DRIVER_ATTR_RW(max_luns);
3079
3080static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
3081{
3082 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_queue);
3083}
3084static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
3085 size_t count)
3086{
3087 int n;
3088
3089 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
3090 (n <= SCSI_DEBUG_CANQUEUE)) {
3091 scsi_debug_max_queue = n;
3092 return count;
3093 }
3094 return -EINVAL;
3095}
3096static DRIVER_ATTR_RW(max_queue);
3097
3098static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
3099{
3100 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_uld);
3101}
3102static DRIVER_ATTR_RO(no_uld);
3103
3104static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
3105{
3106 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level);
3107}
3108static DRIVER_ATTR_RO(scsi_level);
3109
3110static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
3111{
3112 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb);
3113}
3114static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
3115 size_t count)
3116{
3117 int n;
3118
3119 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3120 scsi_debug_virtual_gb = n;
3121
3122 sdebug_capacity = get_sdebug_capacity();
3123
3124 return count;
3125 }
3126 return -EINVAL;
3127}
3128static DRIVER_ATTR_RW(virtual_gb);
3129
3130static ssize_t add_host_show(struct device_driver *ddp, char *buf)
3131{
3132 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host);
3133}
3134
3135static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
3136 size_t count)
3137{
3138 int delta_hosts;
3139
3140 if (sscanf(buf, "%d", &delta_hosts) != 1)
3141 return -EINVAL;
3142 if (delta_hosts > 0) {
3143 do {
3144 sdebug_add_adapter();
3145 } while (--delta_hosts);
3146 } else if (delta_hosts < 0) {
3147 do {
3148 sdebug_remove_adapter();
3149 } while (++delta_hosts);
3150 }
3151 return count;
3152}
3153static DRIVER_ATTR_RW(add_host);
3154
3155static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
3156{
3157 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_vpd_use_hostno);
3158}
3159static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
3160 size_t count)
3161{
3162 int n;
3163
3164 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3165 scsi_debug_vpd_use_hostno = n;
3166 return count;
3167 }
3168 return -EINVAL;
3169}
3170static DRIVER_ATTR_RW(vpd_use_hostno);
3171
3172static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
3173{
3174 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size);
3175}
3176static DRIVER_ATTR_RO(sector_size);
3177
3178static ssize_t dix_show(struct device_driver *ddp, char *buf)
3179{
3180 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix);
3181}
3182static DRIVER_ATTR_RO(dix);
3183
3184static ssize_t dif_show(struct device_driver *ddp, char *buf)
3185{
3186 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif);
3187}
3188static DRIVER_ATTR_RO(dif);
3189
3190static ssize_t guard_show(struct device_driver *ddp, char *buf)
3191{
3192 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_guard);
3193}
3194static DRIVER_ATTR_RO(guard);
3195
3196static ssize_t ato_show(struct device_driver *ddp, char *buf)
3197{
3198 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato);
3199}
3200static DRIVER_ATTR_RO(ato);
3201
3202static ssize_t map_show(struct device_driver *ddp, char *buf)
3203{
3204 ssize_t count;
3205
3206 if (!scsi_debug_lbp())
3207 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
3208 sdebug_store_sectors);
3209
3210 count = bitmap_scnlistprintf(buf, PAGE_SIZE, map_storep, map_size);
3211
3212 buf[count++] = '\n';
3213 buf[count++] = 0;
3214
3215 return count;
3216}
3217static DRIVER_ATTR_RO(map);
3218
3219static ssize_t removable_show(struct device_driver *ddp, char *buf)
3220{
3221 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_removable ? 1 : 0);
3222}
3223static ssize_t removable_store(struct device_driver *ddp, const char *buf,
3224 size_t count)
3225{
3226 int n;
3227
3228 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3229 scsi_debug_removable = (n > 0);
3230 return count;
3231 }
3232 return -EINVAL;
3233}
3234static DRIVER_ATTR_RW(removable);
3235
3236/* Note: The following array creates attribute files in the
3237 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
3238 files (over those found in the /sys/module/scsi_debug/parameters
3239 directory) is that auxiliary actions can be triggered when an attribute
3240 is changed. For example see: sdebug_add_host_store() above.
3241 */
3242
3243static struct attribute *sdebug_drv_attrs[] = {
3244 &driver_attr_delay.attr,
3245 &driver_attr_opts.attr,
3246 &driver_attr_ptype.attr,
3247 &driver_attr_dsense.attr,
3248 &driver_attr_fake_rw.attr,
3249 &driver_attr_no_lun_0.attr,
3250 &driver_attr_num_tgts.attr,
3251 &driver_attr_dev_size_mb.attr,
3252 &driver_attr_num_parts.attr,
3253 &driver_attr_every_nth.attr,
3254 &driver_attr_max_luns.attr,
3255 &driver_attr_max_queue.attr,
3256 &driver_attr_no_uld.attr,
3257 &driver_attr_scsi_level.attr,
3258 &driver_attr_virtual_gb.attr,
3259 &driver_attr_add_host.attr,
3260 &driver_attr_vpd_use_hostno.attr,
3261 &driver_attr_sector_size.attr,
3262 &driver_attr_dix.attr,
3263 &driver_attr_dif.attr,
3264 &driver_attr_guard.attr,
3265 &driver_attr_ato.attr,
3266 &driver_attr_map.attr,
3267 &driver_attr_removable.attr,
3268 NULL,
3269};
3270ATTRIBUTE_GROUPS(sdebug_drv);
3271
3272static struct 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_dix) {
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 scsi_debug_unmap_max_blocks =
3381 clamp(scsi_debug_unmap_max_blocks, 0U, 0xffffffffU);
3382
3383 scsi_debug_unmap_max_desc =
3384 clamp(scsi_debug_unmap_max_desc, 0U, 256U);
3385
3386 scsi_debug_unmap_granularity =
3387 clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU);
3388
3389 if (scsi_debug_unmap_alignment &&
3390 scsi_debug_unmap_granularity <=
3391 scsi_debug_unmap_alignment) {
3392 printk(KERN_ERR
3393 "%s: ERR: unmap_granularity <= unmap_alignment\n",
3394 __func__);
3395 return -EINVAL;
3396 }
3397
3398 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
3399 map_storep = vmalloc(BITS_TO_LONGS(map_size) * sizeof(long));
3400
3401 printk(KERN_INFO "scsi_debug_init: %lu provisioning blocks\n",
3402 map_size);
3403
3404 if (map_storep == NULL) {
3405 printk(KERN_ERR "scsi_debug_init: out of mem. (MAP)\n");
3406 ret = -ENOMEM;
3407 goto free_vm;
3408 }
3409
3410 bitmap_zero(map_storep, map_size);
3411
3412 /* Map first 1KB for partition table */
3413 if (scsi_debug_num_parts)
3414 map_region(0, 2);
3415 }
3416
3417 pseudo_primary = root_device_register("pseudo_0");
3418 if (IS_ERR(pseudo_primary)) {
3419 printk(KERN_WARNING "scsi_debug: root_device_register() error\n");
3420 ret = PTR_ERR(pseudo_primary);
3421 goto free_vm;
3422 }
3423 ret = bus_register(&pseudo_lld_bus);
3424 if (ret < 0) {
3425 printk(KERN_WARNING "scsi_debug: bus_register error: %d\n",
3426 ret);
3427 goto dev_unreg;
3428 }
3429 ret = driver_register(&sdebug_driverfs_driver);
3430 if (ret < 0) {
3431 printk(KERN_WARNING "scsi_debug: driver_register error: %d\n",
3432 ret);
3433 goto bus_unreg;
3434 }
3435
3436 init_all_queued();
3437
3438 host_to_add = scsi_debug_add_host;
3439 scsi_debug_add_host = 0;
3440
3441 for (k = 0; k < host_to_add; k++) {
3442 if (sdebug_add_adapter()) {
3443 printk(KERN_ERR "scsi_debug_init: "
3444 "sdebug_add_adapter failed k=%d\n", k);
3445 break;
3446 }
3447 }
3448
3449 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
3450 printk(KERN_INFO "scsi_debug_init: built %d host(s)\n",
3451 scsi_debug_add_host);
3452 }
3453 return 0;
3454
3455bus_unreg:
3456 bus_unregister(&pseudo_lld_bus);
3457dev_unreg:
3458 root_device_unregister(pseudo_primary);
3459free_vm:
3460 if (map_storep)
3461 vfree(map_storep);
3462 if (dif_storep)
3463 vfree(dif_storep);
3464 vfree(fake_storep);
3465
3466 return ret;
3467}
3468
3469static void __exit scsi_debug_exit(void)
3470{
3471 int k = scsi_debug_add_host;
3472
3473 stop_all_queued();
3474 for (; k; k--)
3475 sdebug_remove_adapter();
3476 driver_unregister(&sdebug_driverfs_driver);
3477 bus_unregister(&pseudo_lld_bus);
3478 root_device_unregister(pseudo_primary);
3479
3480 if (dif_storep)
3481 vfree(dif_storep);
3482
3483 vfree(fake_storep);
3484}
3485
3486device_initcall(scsi_debug_init);
3487module_exit(scsi_debug_exit);
3488
3489static void sdebug_release_adapter(struct device * dev)
3490{
3491 struct sdebug_host_info *sdbg_host;
3492
3493 sdbg_host = to_sdebug_host(dev);
3494 kfree(sdbg_host);
3495}
3496
3497static int sdebug_add_adapter(void)
3498{
3499 int k, devs_per_host;
3500 int error = 0;
3501 struct sdebug_host_info *sdbg_host;
3502 struct sdebug_dev_info *sdbg_devinfo, *tmp;
3503
3504 sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL);
3505 if (NULL == sdbg_host) {
3506 printk(KERN_ERR "%s: out of memory at line %d\n",
3507 __func__, __LINE__);
3508 return -ENOMEM;
3509 }
3510
3511 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
3512
3513 devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns;
3514 for (k = 0; k < devs_per_host; k++) {
3515 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
3516 if (!sdbg_devinfo) {
3517 printk(KERN_ERR "%s: out of memory at line %d\n",
3518 __func__, __LINE__);
3519 error = -ENOMEM;
3520 goto clean;
3521 }
3522 }
3523
3524 spin_lock(&sdebug_host_list_lock);
3525 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
3526 spin_unlock(&sdebug_host_list_lock);
3527
3528 sdbg_host->dev.bus = &pseudo_lld_bus;
3529 sdbg_host->dev.parent = pseudo_primary;
3530 sdbg_host->dev.release = &sdebug_release_adapter;
3531 dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host);
3532
3533 error = device_register(&sdbg_host->dev);
3534
3535 if (error)
3536 goto clean;
3537
3538 ++scsi_debug_add_host;
3539 return error;
3540
3541clean:
3542 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
3543 dev_list) {
3544 list_del(&sdbg_devinfo->dev_list);
3545 kfree(sdbg_devinfo);
3546 }
3547
3548 kfree(sdbg_host);
3549 return error;
3550}
3551
3552static void sdebug_remove_adapter(void)
3553{
3554 struct sdebug_host_info * sdbg_host = NULL;
3555
3556 spin_lock(&sdebug_host_list_lock);
3557 if (!list_empty(&sdebug_host_list)) {
3558 sdbg_host = list_entry(sdebug_host_list.prev,
3559 struct sdebug_host_info, host_list);
3560 list_del(&sdbg_host->host_list);
3561 }
3562 spin_unlock(&sdebug_host_list_lock);
3563
3564 if (!sdbg_host)
3565 return;
3566
3567 device_unregister(&sdbg_host->dev);
3568 --scsi_debug_add_host;
3569}
3570
3571static
3572int scsi_debug_queuecommand_lck(struct scsi_cmnd *SCpnt, done_funct_t done)
3573{
3574 unsigned char *cmd = (unsigned char *) SCpnt->cmnd;
3575 int len, k;
3576 unsigned int num;
3577 unsigned long long lba;
3578 u32 ei_lba;
3579 int errsts = 0;
3580 int target = SCpnt->device->id;
3581 struct sdebug_dev_info *devip = NULL;
3582 int inj_recovered = 0;
3583 int inj_transport = 0;
3584 int inj_dif = 0;
3585 int inj_dix = 0;
3586 int delay_override = 0;
3587 int unmap = 0;
3588
3589 scsi_set_resid(SCpnt, 0);
3590 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmd) {
3591 printk(KERN_INFO "scsi_debug: cmd ");
3592 for (k = 0, len = SCpnt->cmd_len; k < len; ++k)
3593 printk("%02x ", (int)cmd[k]);
3594 printk("\n");
3595 }
3596
3597 if (target == SCpnt->device->host->hostt->this_id) {
3598 printk(KERN_INFO "scsi_debug: initiator's id used as "
3599 "target!\n");
3600 return schedule_resp(SCpnt, NULL, done,
3601 DID_NO_CONNECT << 16, 0);
3602 }
3603
3604 if ((SCpnt->device->lun >= scsi_debug_max_luns) &&
3605 (SCpnt->device->lun != SAM2_WLUN_REPORT_LUNS))
3606 return schedule_resp(SCpnt, NULL, done,
3607 DID_NO_CONNECT << 16, 0);
3608 devip = devInfoReg(SCpnt->device);
3609 if (NULL == devip)
3610 return schedule_resp(SCpnt, NULL, done,
3611 DID_NO_CONNECT << 16, 0);
3612
3613 if ((scsi_debug_every_nth != 0) &&
3614 (++scsi_debug_cmnd_count >= abs(scsi_debug_every_nth))) {
3615 scsi_debug_cmnd_count = 0;
3616 if (scsi_debug_every_nth < -1)
3617 scsi_debug_every_nth = -1;
3618 if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts)
3619 return 0; /* ignore command causing timeout */
3620 else if (SCSI_DEBUG_OPT_MAC_TIMEOUT & scsi_debug_opts &&
3621 scsi_medium_access_command(SCpnt))
3622 return 0; /* time out reads and writes */
3623 else if (SCSI_DEBUG_OPT_RECOVERED_ERR & scsi_debug_opts)
3624 inj_recovered = 1; /* to reads and writes below */
3625 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & scsi_debug_opts)
3626 inj_transport = 1; /* to reads and writes below */
3627 else if (SCSI_DEBUG_OPT_DIF_ERR & scsi_debug_opts)
3628 inj_dif = 1; /* to reads and writes below */
3629 else if (SCSI_DEBUG_OPT_DIX_ERR & scsi_debug_opts)
3630 inj_dix = 1; /* to reads and writes below */
3631 }
3632
3633 if (devip->wlun) {
3634 switch (*cmd) {
3635 case INQUIRY:
3636 case REQUEST_SENSE:
3637 case TEST_UNIT_READY:
3638 case REPORT_LUNS:
3639 break; /* only allowable wlun commands */
3640 default:
3641 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3642 printk(KERN_INFO "scsi_debug: Opcode: 0x%x "
3643 "not supported for wlun\n", *cmd);
3644 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3645 INVALID_OPCODE, 0);
3646 errsts = check_condition_result;
3647 return schedule_resp(SCpnt, devip, done, errsts,
3648 0);
3649 }
3650 }
3651
3652 switch (*cmd) {
3653 case INQUIRY: /* mandatory, ignore unit attention */
3654 delay_override = 1;
3655 errsts = resp_inquiry(SCpnt, target, devip);
3656 break;
3657 case REQUEST_SENSE: /* mandatory, ignore unit attention */
3658 delay_override = 1;
3659 errsts = resp_requests(SCpnt, devip);
3660 break;
3661 case REZERO_UNIT: /* actually this is REWIND for SSC */
3662 case START_STOP:
3663 errsts = resp_start_stop(SCpnt, devip);
3664 break;
3665 case ALLOW_MEDIUM_REMOVAL:
3666 errsts = check_readiness(SCpnt, 1, devip);
3667 if (errsts)
3668 break;
3669 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3670 printk(KERN_INFO "scsi_debug: Medium removal %s\n",
3671 cmd[4] ? "inhibited" : "enabled");
3672 break;
3673 case SEND_DIAGNOSTIC: /* mandatory */
3674 errsts = check_readiness(SCpnt, 1, devip);
3675 break;
3676 case TEST_UNIT_READY: /* mandatory */
3677 delay_override = 1;
3678 errsts = check_readiness(SCpnt, 0, devip);
3679 break;
3680 case RESERVE:
3681 errsts = check_readiness(SCpnt, 1, devip);
3682 break;
3683 case RESERVE_10:
3684 errsts = check_readiness(SCpnt, 1, devip);
3685 break;
3686 case RELEASE:
3687 errsts = check_readiness(SCpnt, 1, devip);
3688 break;
3689 case RELEASE_10:
3690 errsts = check_readiness(SCpnt, 1, devip);
3691 break;
3692 case READ_CAPACITY:
3693 errsts = resp_readcap(SCpnt, devip);
3694 break;
3695 case SERVICE_ACTION_IN:
3696 if (cmd[1] == SAI_READ_CAPACITY_16)
3697 errsts = resp_readcap16(SCpnt, devip);
3698 else if (cmd[1] == SAI_GET_LBA_STATUS) {
3699
3700 if (scsi_debug_lbp() == 0) {
3701 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3702 INVALID_COMMAND_OPCODE, 0);
3703 errsts = check_condition_result;
3704 } else
3705 errsts = resp_get_lba_status(SCpnt, devip);
3706 } else {
3707 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3708 INVALID_OPCODE, 0);
3709 errsts = check_condition_result;
3710 }
3711 break;
3712 case MAINTENANCE_IN:
3713 if (MI_REPORT_TARGET_PGS != cmd[1]) {
3714 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3715 INVALID_OPCODE, 0);
3716 errsts = check_condition_result;
3717 break;
3718 }
3719 errsts = resp_report_tgtpgs(SCpnt, devip);
3720 break;
3721 case READ_16:
3722 case READ_12:
3723 case READ_10:
3724 /* READ{10,12,16} and DIF Type 2 are natural enemies */
3725 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
3726 cmd[1] & 0xe0) {
3727 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3728 INVALID_COMMAND_OPCODE, 0);
3729 errsts = check_condition_result;
3730 break;
3731 }
3732
3733 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
3734 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
3735 (cmd[1] & 0xe0) == 0)
3736 printk(KERN_ERR "Unprotected RD/WR to DIF device\n");
3737
3738 /* fall through */
3739 case READ_6:
3740read:
3741 errsts = check_readiness(SCpnt, 0, devip);
3742 if (errsts)
3743 break;
3744 if (scsi_debug_fake_rw)
3745 break;
3746 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3747 errsts = resp_read(SCpnt, lba, num, devip, ei_lba);
3748 if (inj_recovered && (0 == errsts)) {
3749 mk_sense_buffer(devip, RECOVERED_ERROR,
3750 THRESHOLD_EXCEEDED, 0);
3751 errsts = check_condition_result;
3752 } else if (inj_transport && (0 == errsts)) {
3753 mk_sense_buffer(devip, ABORTED_COMMAND,
3754 TRANSPORT_PROBLEM, ACK_NAK_TO);
3755 errsts = check_condition_result;
3756 } else if (inj_dif && (0 == errsts)) {
3757 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1);
3758 errsts = illegal_condition_result;
3759 } else if (inj_dix && (0 == errsts)) {
3760 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1);
3761 errsts = illegal_condition_result;
3762 }
3763 break;
3764 case REPORT_LUNS: /* mandatory, ignore unit attention */
3765 delay_override = 1;
3766 errsts = resp_report_luns(SCpnt, devip);
3767 break;
3768 case VERIFY: /* 10 byte SBC-2 command */
3769 errsts = check_readiness(SCpnt, 0, devip);
3770 break;
3771 case WRITE_16:
3772 case WRITE_12:
3773 case WRITE_10:
3774 /* WRITE{10,12,16} and DIF Type 2 are natural enemies */
3775 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
3776 cmd[1] & 0xe0) {
3777 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3778 INVALID_COMMAND_OPCODE, 0);
3779 errsts = check_condition_result;
3780 break;
3781 }
3782
3783 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
3784 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
3785 (cmd[1] & 0xe0) == 0)
3786 printk(KERN_ERR "Unprotected RD/WR to DIF device\n");
3787
3788 /* fall through */
3789 case WRITE_6:
3790write:
3791 errsts = check_readiness(SCpnt, 0, devip);
3792 if (errsts)
3793 break;
3794 if (scsi_debug_fake_rw)
3795 break;
3796 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3797 errsts = resp_write(SCpnt, lba, num, devip, ei_lba);
3798 if (inj_recovered && (0 == errsts)) {
3799 mk_sense_buffer(devip, RECOVERED_ERROR,
3800 THRESHOLD_EXCEEDED, 0);
3801 errsts = check_condition_result;
3802 } else if (inj_dif && (0 == errsts)) {
3803 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1);
3804 errsts = illegal_condition_result;
3805 } else if (inj_dix && (0 == errsts)) {
3806 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1);
3807 errsts = illegal_condition_result;
3808 }
3809 break;
3810 case WRITE_SAME_16:
3811 case WRITE_SAME:
3812 if (cmd[1] & 0x8) {
3813 if ((*cmd == WRITE_SAME_16 && scsi_debug_lbpws == 0) ||
3814 (*cmd == WRITE_SAME && scsi_debug_lbpws10 == 0)) {
3815 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3816 INVALID_FIELD_IN_CDB, 0);
3817 errsts = check_condition_result;
3818 } else
3819 unmap = 1;
3820 }
3821 if (errsts)
3822 break;
3823 errsts = check_readiness(SCpnt, 0, devip);
3824 if (errsts)
3825 break;
3826 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3827 errsts = resp_write_same(SCpnt, lba, num, devip, ei_lba, unmap);
3828 break;
3829 case UNMAP:
3830 errsts = check_readiness(SCpnt, 0, devip);
3831 if (errsts)
3832 break;
3833
3834 if (scsi_debug_unmap_max_desc == 0 || scsi_debug_lbpu == 0) {
3835 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3836 INVALID_COMMAND_OPCODE, 0);
3837 errsts = check_condition_result;
3838 } else
3839 errsts = resp_unmap(SCpnt, devip);
3840 break;
3841 case MODE_SENSE:
3842 case MODE_SENSE_10:
3843 errsts = resp_mode_sense(SCpnt, target, devip);
3844 break;
3845 case MODE_SELECT:
3846 errsts = resp_mode_select(SCpnt, 1, devip);
3847 break;
3848 case MODE_SELECT_10:
3849 errsts = resp_mode_select(SCpnt, 0, devip);
3850 break;
3851 case LOG_SENSE:
3852 errsts = resp_log_sense(SCpnt, devip);
3853 break;
3854 case SYNCHRONIZE_CACHE:
3855 delay_override = 1;
3856 errsts = check_readiness(SCpnt, 0, devip);
3857 break;
3858 case WRITE_BUFFER:
3859 errsts = check_readiness(SCpnt, 1, devip);
3860 break;
3861 case XDWRITEREAD_10:
3862 if (!scsi_bidi_cmnd(SCpnt)) {
3863 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3864 INVALID_FIELD_IN_CDB, 0);
3865 errsts = check_condition_result;
3866 break;
3867 }
3868
3869 errsts = check_readiness(SCpnt, 0, devip);
3870 if (errsts)
3871 break;
3872 if (scsi_debug_fake_rw)
3873 break;
3874 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3875 errsts = resp_read(SCpnt, lba, num, devip, ei_lba);
3876 if (errsts)
3877 break;
3878 errsts = resp_write(SCpnt, lba, num, devip, ei_lba);
3879 if (errsts)
3880 break;
3881 errsts = resp_xdwriteread(SCpnt, lba, num, devip);
3882 break;
3883 case VARIABLE_LENGTH_CMD:
3884 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION) {
3885
3886 if ((cmd[10] & 0xe0) == 0)
3887 printk(KERN_ERR
3888 "Unprotected RD/WR to DIF device\n");
3889
3890 if (cmd[9] == READ_32) {
3891 BUG_ON(SCpnt->cmd_len < 32);
3892 goto read;
3893 }
3894
3895 if (cmd[9] == WRITE_32) {
3896 BUG_ON(SCpnt->cmd_len < 32);
3897 goto write;
3898 }
3899 }
3900
3901 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3902 INVALID_FIELD_IN_CDB, 0);
3903 errsts = check_condition_result;
3904 break;
3905
3906 default:
3907 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3908 printk(KERN_INFO "scsi_debug: Opcode: 0x%x not "
3909 "supported\n", *cmd);
3910 errsts = check_readiness(SCpnt, 1, devip);
3911 if (errsts)
3912 break; /* Unit attention takes precedence */
3913 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
3914 errsts = check_condition_result;
3915 break;
3916 }
3917 return schedule_resp(SCpnt, devip, done, errsts,
3918 (delay_override ? 0 : scsi_debug_delay));
3919}
3920
3921static DEF_SCSI_QCMD(scsi_debug_queuecommand)
3922
3923static struct scsi_host_template sdebug_driver_template = {
3924 .show_info = scsi_debug_show_info,
3925 .write_info = scsi_debug_write_info,
3926 .proc_name = sdebug_proc_name,
3927 .name = "SCSI DEBUG",
3928 .info = scsi_debug_info,
3929 .slave_alloc = scsi_debug_slave_alloc,
3930 .slave_configure = scsi_debug_slave_configure,
3931 .slave_destroy = scsi_debug_slave_destroy,
3932 .ioctl = scsi_debug_ioctl,
3933 .queuecommand = scsi_debug_queuecommand,
3934 .eh_abort_handler = scsi_debug_abort,
3935 .eh_bus_reset_handler = scsi_debug_bus_reset,
3936 .eh_device_reset_handler = scsi_debug_device_reset,
3937 .eh_host_reset_handler = scsi_debug_host_reset,
3938 .bios_param = scsi_debug_biosparam,
3939 .can_queue = SCSI_DEBUG_CANQUEUE,
3940 .this_id = 7,
3941 .sg_tablesize = 256,
3942 .cmd_per_lun = 16,
3943 .max_sectors = 0xffff,
3944 .use_clustering = DISABLE_CLUSTERING,
3945 .module = THIS_MODULE,
3946};
3947
3948static int sdebug_driver_probe(struct device * dev)
3949{
3950 int error = 0;
3951 struct sdebug_host_info *sdbg_host;
3952 struct Scsi_Host *hpnt;
3953 int host_prot;
3954
3955 sdbg_host = to_sdebug_host(dev);
3956
3957 sdebug_driver_template.can_queue = scsi_debug_max_queue;
3958 if (scsi_debug_clustering)
3959 sdebug_driver_template.use_clustering = ENABLE_CLUSTERING;
3960 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
3961 if (NULL == hpnt) {
3962 printk(KERN_ERR "%s: scsi_register failed\n", __func__);
3963 error = -ENODEV;
3964 return error;
3965 }
3966
3967 sdbg_host->shost = hpnt;
3968 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
3969 if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id))
3970 hpnt->max_id = scsi_debug_num_tgts + 1;
3971 else
3972 hpnt->max_id = scsi_debug_num_tgts;
3973 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; /* = scsi_debug_max_luns; */
3974
3975 host_prot = 0;
3976
3977 switch (scsi_debug_dif) {
3978
3979 case SD_DIF_TYPE1_PROTECTION:
3980 host_prot = SHOST_DIF_TYPE1_PROTECTION;
3981 if (scsi_debug_dix)
3982 host_prot |= SHOST_DIX_TYPE1_PROTECTION;
3983 break;
3984
3985 case SD_DIF_TYPE2_PROTECTION:
3986 host_prot = SHOST_DIF_TYPE2_PROTECTION;
3987 if (scsi_debug_dix)
3988 host_prot |= SHOST_DIX_TYPE2_PROTECTION;
3989 break;
3990
3991 case SD_DIF_TYPE3_PROTECTION:
3992 host_prot = SHOST_DIF_TYPE3_PROTECTION;
3993 if (scsi_debug_dix)
3994 host_prot |= SHOST_DIX_TYPE3_PROTECTION;
3995 break;
3996
3997 default:
3998 if (scsi_debug_dix)
3999 host_prot |= SHOST_DIX_TYPE0_PROTECTION;
4000 break;
4001 }
4002
4003 scsi_host_set_prot(hpnt, host_prot);
4004
4005 printk(KERN_INFO "scsi_debug: host protection%s%s%s%s%s%s%s\n",
4006 (host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
4007 (host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
4008 (host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
4009 (host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
4010 (host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
4011 (host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
4012 (host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
4013
4014 if (scsi_debug_guard == 1)
4015 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
4016 else
4017 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
4018
4019 error = scsi_add_host(hpnt, &sdbg_host->dev);
4020 if (error) {
4021 printk(KERN_ERR "%s: scsi_add_host failed\n", __func__);
4022 error = -ENODEV;
4023 scsi_host_put(hpnt);
4024 } else
4025 scsi_scan_host(hpnt);
4026
4027
4028 return error;
4029}
4030
4031static int sdebug_driver_remove(struct device * dev)
4032{
4033 struct sdebug_host_info *sdbg_host;
4034 struct sdebug_dev_info *sdbg_devinfo, *tmp;
4035
4036 sdbg_host = to_sdebug_host(dev);
4037
4038 if (!sdbg_host) {
4039 printk(KERN_ERR "%s: Unable to locate host info\n",
4040 __func__);
4041 return -ENODEV;
4042 }
4043
4044 scsi_remove_host(sdbg_host->shost);
4045
4046 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
4047 dev_list) {
4048 list_del(&sdbg_devinfo->dev_list);
4049 kfree(sdbg_devinfo);
4050 }
4051
4052 scsi_host_put(sdbg_host->shost);
4053 return 0;
4054}
4055
4056static int pseudo_lld_bus_match(struct device *dev,
4057 struct device_driver *dev_driver)
4058{
4059 return 1;
4060}
4061
4062static struct bus_type pseudo_lld_bus = {
4063 .name = "pseudo",
4064 .match = pseudo_lld_bus_match,
4065 .probe = sdebug_driver_probe,
4066 .remove = sdebug_driver_remove,
4067 .drv_groups = sdebug_drv_groups,
4068};