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1da177e4 1/*
1da177e4
LT		 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
23183910
DG		 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.
1da177e4
LT		 13 *
14 *
78d4e5a0 15 * For documentation see http://sg.danny.cz/sg/sdebug26.html
1da177e4
LT		 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
1da177e4
LT		 28#include <linux/module.h>
29
30#include <linux/kernel.h>
1da177e4
LT		 31#include <linux/errno.h>
32#include <linux/timer.h>
5a0e3ad6 33#include <linux/slab.h>
1da177e4
LT		 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>
1da177e4
LT		 40#include <linux/vmalloc.h>
41#include <linux/moduleparam.h>
852e034d 42#include <linux/scatterlist.h>
1da177e4 43#include <linux/blkdev.h>
c6a44287
MP		 44#include <linux/crc-t10dif.h>
45
46#include <net/checksum.h>
9ff26eef 47
44d92694
MP		 48#include <asm/unaligned.h>
49
9ff26eef
FT		 50#include <scsi/scsi.h>
51#include <scsi/scsi_cmnd.h>
52#include <scsi/scsi_device.h>
1da177e4
LT		 53#include <scsi/scsi_host.h>
54#include <scsi/scsicam.h>
a34c4e98 55#include <scsi/scsi_eh.h>
395cef03 56#include <scsi/scsi_dbg.h>
1da177e4 57
c6a44287 58#include "sd.h"
1da177e4 59#include "scsi_logging.h"
1da177e4 60
78d4e5a0
DG		 61#define SCSI_DEBUG_VERSION "1.82"
62static const char * scsi_debug_version_date = "20100324";
1da177e4 63
6f3cbf55 64/* Additional Sense Code (ASC) */
c65b1445
DG		 65#define NO_ADDITIONAL_SENSE 0x0
66#define LOGICAL_UNIT_NOT_READY 0x4
1da177e4 67#define UNRECOVERED_READ_ERR 0x11
c65b1445 68#define PARAMETER_LIST_LENGTH_ERR 0x1a
1da177e4
LT		 69#define INVALID_OPCODE 0x20
70#define ADDR_OUT_OF_RANGE 0x21
395cef03 71#define INVALID_COMMAND_OPCODE 0x20
1da177e4 72#define INVALID_FIELD_IN_CDB 0x24
c65b1445 73#define INVALID_FIELD_IN_PARAM_LIST 0x26
1da177e4
LT		 74#define POWERON_RESET 0x29
75#define SAVING_PARAMS_UNSUP 0x39
6f3cbf55 76#define TRANSPORT_PROBLEM 0x4b
c65b1445
DG		 77#define THRESHOLD_EXCEEDED 0x5d
78#define LOW_POWER_COND_ON 0x5e
1da177e4 79
6f3cbf55
DG		 80/* Additional Sense Code Qualifier (ASCQ) */
81#define ACK_NAK_TO 0x3
82
1da177e4
LT		 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_DELAY 1
93#define DEF_DEV_SIZE_MB 8
94#define DEF_EVERY_NTH 0
95#define DEF_NUM_PARTS 0
96#define DEF_OPTS 0
97#define DEF_SCSI_LEVEL 5 /* INQUIRY, byte2 [5->SPC-3] */
98#define DEF_PTYPE 0
99#define DEF_D_SENSE 0
c65b1445
DG		 100#define DEF_NO_LUN_0 0
101#define DEF_VIRTUAL_GB 0
23183910
DG		 102#define DEF_FAKE_RW 0
103#define DEF_VPD_USE_HOSTNO 1
597136ab 104#define DEF_SECTOR_SIZE 512
c6a44287
MP		 105#define DEF_DIX 0
106#define DEF_DIF 0
107#define DEF_GUARD 0
108#define DEF_ATO 1
ea61fca5
MP		 109#define DEF_PHYSBLK_EXP 0
110#define DEF_LOWEST_ALIGNED 0
e308b3d1 111#define DEF_OPT_BLKS 64
44d92694
MP		 112#define DEF_UNMAP_MAX_BLOCKS 0
113#define DEF_UNMAP_MAX_DESC 0
114#define DEF_UNMAP_GRANULARITY 0
115#define DEF_UNMAP_ALIGNMENT 0
1da177e4
LT		 116
117/* bit mask values for scsi_debug_opts */
118#define SCSI_DEBUG_OPT_NOISE 1
119#define SCSI_DEBUG_OPT_MEDIUM_ERR 2
120#define SCSI_DEBUG_OPT_TIMEOUT 4
121#define SCSI_DEBUG_OPT_RECOVERED_ERR 8
6f3cbf55 122#define SCSI_DEBUG_OPT_TRANSPORT_ERR 16
c6a44287
MP		 123#define SCSI_DEBUG_OPT_DIF_ERR 32
124#define SCSI_DEBUG_OPT_DIX_ERR 64
1da177e4
LT		 125/* When "every_nth" > 0 then modulo "every_nth" commands:
126 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
127 * - a RECOVERED_ERROR is simulated on successful read and write
128 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
6f3cbf55
DG		 129 * - a TRANSPORT_ERROR is simulated on successful read and write
130 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
1da177e4
LT		 131 *
132 * When "every_nth" < 0 then after "- every_nth" commands:
133 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
134 * - a RECOVERED_ERROR is simulated on successful read and write
135 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
6f3cbf55
DG		 136 * - a TRANSPORT_ERROR is simulated on successful read and write
137 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
1da177e4
LT		 138 * This will continue until some other action occurs (e.g. the user
139 * writing a new value (other than -1 or 1) to every_nth via sysfs).
140 */
141
142/* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
143 * sector on read commands: */
144#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
145
146/* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
147 * or "peripheral device" addressing (value 0) */
148#define SAM2_LUN_ADDRESS_METHOD 0
c65b1445 149#define SAM2_WLUN_REPORT_LUNS 0xc101
1da177e4 150
78d4e5a0
DG		 151/* Can queue up to this number of commands. Typically commands that
152 * that have a non-zero delay are queued. */
153#define SCSI_DEBUG_CANQUEUE 255
154
1da177e4
LT		 155static int scsi_debug_add_host = DEF_NUM_HOST;
156static int scsi_debug_delay = DEF_DELAY;
157static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB;
158static int scsi_debug_every_nth = DEF_EVERY_NTH;
159static int scsi_debug_max_luns = DEF_MAX_LUNS;
78d4e5a0 160static int scsi_debug_max_queue = SCSI_DEBUG_CANQUEUE;
1da177e4 161static int scsi_debug_num_parts = DEF_NUM_PARTS;
78d4e5a0 162static int scsi_debug_no_uld = 0;
1da177e4
LT		 163static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */
164static int scsi_debug_opts = DEF_OPTS;
165static int scsi_debug_scsi_level = DEF_SCSI_LEVEL;
166static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */
167static int scsi_debug_dsense = DEF_D_SENSE;
c65b1445
DG		 168static int scsi_debug_no_lun_0 = DEF_NO_LUN_0;
169static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB;
23183910
DG		 170static int scsi_debug_fake_rw = DEF_FAKE_RW;
171static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
597136ab 172static int scsi_debug_sector_size = DEF_SECTOR_SIZE;
c6a44287
MP		 173static int scsi_debug_dix = DEF_DIX;
174static int scsi_debug_dif = DEF_DIF;
175static int scsi_debug_guard = DEF_GUARD;
176static int scsi_debug_ato = DEF_ATO;
ea61fca5
MP		 177static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP;
178static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED;
e308b3d1 179static int scsi_debug_opt_blks = DEF_OPT_BLKS;
44d92694
MP		 180static int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
181static int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
182static int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY;
183static int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
1da177e4
LT		 184
185static int scsi_debug_cmnd_count = 0;
186
187#define DEV_READONLY(TGT) (0)
188#define DEV_REMOVEABLE(TGT) (0)
189
c65b1445 190static unsigned int sdebug_store_sectors;
1da177e4
LT		 191static sector_t sdebug_capacity; /* in sectors */
192
193/* old BIOS stuff, kernel may get rid of them but some mode sense pages
194 may still need them */
195static int sdebug_heads; /* heads per disk */
196static int sdebug_cylinders_per; /* cylinders per surface */
197static int sdebug_sectors_per; /* sectors per cylinder */
198
1da177e4
LT		 199#define SDEBUG_MAX_PARTS 4
200
201#define SDEBUG_SENSE_LEN 32
202
395cef03 203#define SCSI_DEBUG_MAX_CMD_LEN 32
9e603ca0 204
1da177e4
LT		 205struct sdebug_dev_info {
206 struct list_head dev_list;
207 unsigned char sense_buff[SDEBUG_SENSE_LEN]; /* weak nexus */
208 unsigned int channel;
209 unsigned int target;
210 unsigned int lun;
211 struct sdebug_host_info *sdbg_host;
c65b1445 212 unsigned int wlun;
1da177e4 213 char reset;
c65b1445 214 char stopped;
1da177e4
LT		 215 char used;
216};
217
218struct sdebug_host_info {
219 struct list_head host_list;
220 struct Scsi_Host *shost;
221 struct device dev;
222 struct list_head dev_info_list;
223};
224
225#define to_sdebug_host(d) \
226 container_of(d, struct sdebug_host_info, dev)
227
228static LIST_HEAD(sdebug_host_list);
229static DEFINE_SPINLOCK(sdebug_host_list_lock);
230
231typedef void (* done_funct_t) (struct scsi_cmnd *);
232
233struct sdebug_queued_cmd {
234 int in_use;
235 struct timer_list cmnd_timer;
236 done_funct_t done_funct;
237 struct scsi_cmnd * a_cmnd;
238 int scsi_result;
239};
240static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
241
1da177e4 242static unsigned char * fake_storep; /* ramdisk storage */
c6a44287 243static unsigned char *dif_storep; /* protection info */
44d92694 244static void *map_storep; /* provisioning map */
1da177e4 245
44d92694 246static unsigned long map_size;
1da177e4
LT		 247static int num_aborts = 0;
248static int num_dev_resets = 0;
249static int num_bus_resets = 0;
250static int num_host_resets = 0;
c6a44287
MP		 251static int dix_writes;
252static int dix_reads;
253static int dif_errors;
1da177e4
LT		 254
255static DEFINE_SPINLOCK(queued_arr_lock);
256static DEFINE_RWLOCK(atomic_rw);
257
258static char sdebug_proc_name[] = "scsi_debug";
259
1da177e4
LT		 260static struct bus_type pseudo_lld_bus;
261
c6a44287
MP		 262static inline sector_t dif_offset(sector_t sector)
263{
264 return sector << 3;
265}
266
1da177e4
LT		 267static struct device_driver sdebug_driverfs_driver = {
268 .name = sdebug_proc_name,
269 .bus = &pseudo_lld_bus,
1da177e4
LT		 270};
271
272static const int check_condition_result =
273 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
274
c6a44287
MP		 275static const int illegal_condition_result =
276 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
277
c65b1445
DG		 278static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
279 0, 0, 0x2, 0x4b};
280static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
281 0, 0, 0x0, 0x0};
282
1da177e4
LT		 283static int sdebug_add_adapter(void);
284static void sdebug_remove_adapter(void);
1da177e4 285
8dea0d02
FT		 286static void sdebug_max_tgts_luns(void)
287{
288 struct sdebug_host_info *sdbg_host;
289 struct Scsi_Host *hpnt;
290
291 spin_lock(&sdebug_host_list_lock);
292 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
293 hpnt = sdbg_host->shost;
294 if ((hpnt->this_id >= 0) &&
295 (scsi_debug_num_tgts > hpnt->this_id))
296 hpnt->max_id = scsi_debug_num_tgts + 1;
297 else
298 hpnt->max_id = scsi_debug_num_tgts;
299 /* scsi_debug_max_luns; */
300 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS;
301 }
302 spin_unlock(&sdebug_host_list_lock);
303}
304
305static void mk_sense_buffer(struct sdebug_dev_info *devip, int key,
306 int asc, int asq)
307{
308 unsigned char *sbuff;
309
310 sbuff = devip->sense_buff;
311 memset(sbuff, 0, SDEBUG_SENSE_LEN);
312
313 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, key, asc, asq);
314
315 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
316 printk(KERN_INFO "scsi_debug: [sense_key,asc,ascq]: "
317 "[0x%x,0x%x,0x%x]\n", key, asc, asq);
318}
1da177e4 319
3de9f944 320static void get_data_transfer_info(unsigned char *cmd,
395cef03
MP		 321 unsigned long long *lba, unsigned int *num,
322 u32 *ei_lba)
3de9f944 323{
395cef03
MP		 324 *ei_lba = 0;
325
3de9f944 326 switch (*cmd) {
395cef03
MP		 327 case VARIABLE_LENGTH_CMD:
328 *lba = (u64)cmd[19] | (u64)cmd[18] << 8 |
329 (u64)cmd[17] << 16 | (u64)cmd[16] << 24 |
330 (u64)cmd[15] << 32 | (u64)cmd[14] << 40 |
331 (u64)cmd[13] << 48 | (u64)cmd[12] << 56;
332
333 *ei_lba = (u32)cmd[23] | (u32)cmd[22] << 8 |
334 (u32)cmd[21] << 16 | (u32)cmd[20] << 24;
335
336 *num = (u32)cmd[31] | (u32)cmd[30] << 8 | (u32)cmd[29] << 16 |
337 (u32)cmd[28] << 24;
338 break;
339
44d92694 340 case WRITE_SAME_16:
3de9f944
FT		 341 case WRITE_16:
342 case READ_16:
d5cdc989
FT		 343 *lba = (u64)cmd[9] | (u64)cmd[8] << 8 |
344 (u64)cmd[7] << 16 | (u64)cmd[6] << 24 |
345 (u64)cmd[5] << 32 | (u64)cmd[4] << 40 |
346 (u64)cmd[3] << 48 | (u64)cmd[2] << 56;
347
348 *num = (u32)cmd[13] | (u32)cmd[12] << 8 | (u32)cmd[11] << 16 |
349 (u32)cmd[10] << 24;
3de9f944
FT		 350 break;
351 case WRITE_12:
352 case READ_12:
d5cdc989
FT		 353 *lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 |
354 (u32)cmd[2] << 24;
355
356 *num = (u32)cmd[9] | (u32)cmd[8] << 8 | (u32)cmd[7] << 16 |
357 (u32)cmd[6] << 24;
3de9f944 358 break;
44d92694 359 case WRITE_SAME:
3de9f944
FT		 360 case WRITE_10:
361 case READ_10:
c639d14e 362 case XDWRITEREAD_10:
d5cdc989
FT		 363 *lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 |
364 (u32)cmd[2] << 24;
365
366 *num = (u32)cmd[8] | (u32)cmd[7] << 8;
3de9f944
FT		 367 break;
368 case WRITE_6:
369 case READ_6:
d5cdc989
FT		 370 *lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
371 (u32)(cmd[1] & 0x1f) << 16;
3de9f944
FT		 372 *num = (0 == cmd[4]) ? 256 : cmd[4];
373 break;
374 default:
375 break;
376 }
377}
1da177e4 378
1da177e4
LT		 379static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
380{
381 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
382 printk(KERN_INFO "scsi_debug: ioctl: cmd=0x%x\n", cmd);
383 }
384 return -EINVAL;
385 /* return -ENOTTY; // correct return but upsets fdisk */
386}
387
c65b1445
DG		 388static int check_readiness(struct scsi_cmnd * SCpnt, int reset_only,
389 struct sdebug_dev_info * devip)
1da177e4
LT		 390{
391 if (devip->reset) {
392 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
393 printk(KERN_INFO "scsi_debug: Reporting Unit "
394 "attention: power on reset\n");
395 devip->reset = 0;
396 mk_sense_buffer(devip, UNIT_ATTENTION, POWERON_RESET, 0);
397 return check_condition_result;
398 }
c65b1445
DG		 399 if ((0 == reset_only) && devip->stopped) {
400 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
401 printk(KERN_INFO "scsi_debug: Reporting Not "
402 "ready: initializing command required\n");
403 mk_sense_buffer(devip, NOT_READY, LOGICAL_UNIT_NOT_READY,
404 0x2);
405 return check_condition_result;
406 }
1da177e4
LT		 407 return 0;
408}
409
410/* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */
21a61829 411static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1da177e4
LT		 412 int arr_len)
413{
21a61829 414 int act_len;
072d0bb3 415 struct scsi_data_buffer *sdb = scsi_in(scp);
1da177e4 416
072d0bb3 417 if (!sdb->length)
1da177e4 418 return 0;
072d0bb3 419 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
1da177e4 420 return (DID_ERROR << 16);
21a61829
FT		 421
422 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
423 arr, arr_len);
072d0bb3
FT		 424 if (sdb->resid)
425 sdb->resid -= act_len;
c65b1445 426 else
21a61829
FT		 427 sdb->resid = scsi_bufflen(scp) - act_len;
428
1da177e4
LT		 429 return 0;
430}
431
432/* Returns number of bytes fetched into 'arr' or -1 if error. */
21a61829
FT		 433static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
434 int arr_len)
1da177e4 435{
21a61829 436 if (!scsi_bufflen(scp))
1da177e4 437 return 0;
072d0bb3 438 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE))
1da177e4 439 return -1;
21a61829
FT		 440
441 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
1da177e4
LT		 442}
443
444
445static const char * inq_vendor_id = "Linux ";
446static const char * inq_product_id = "scsi_debug ";
447static const char * inq_product_rev = "0004";
448
5a09e398
HR		 449static int inquiry_evpd_83(unsigned char * arr, int port_group_id,
450 int target_dev_id, int dev_id_num,
451 const char * dev_id_str,
c65b1445 452 int dev_id_str_len)
1da177e4 453{
c65b1445
DG		 454 int num, port_a;
455 char b[32];
1da177e4 456
c65b1445 457 port_a = target_dev_id + 1;
1da177e4
LT		 458 /* T10 vendor identifier field format (faked) */
459 arr[0] = 0x2; /* ASCII */
460 arr[1] = 0x1;
461 arr[2] = 0x0;
462 memcpy(&arr[4], inq_vendor_id, 8);
463 memcpy(&arr[12], inq_product_id, 16);
464 memcpy(&arr[28], dev_id_str, dev_id_str_len);
465 num = 8 + 16 + dev_id_str_len;
466 arr[3] = num;
467 num += 4;
c65b1445
DG		 468 if (dev_id_num >= 0) {
469 /* NAA-5, Logical unit identifier (binary) */
470 arr[num++] = 0x1; /* binary (not necessarily sas) */
471 arr[num++] = 0x3; /* PIV=0, lu, naa */
472 arr[num++] = 0x0;
473 arr[num++] = 0x8;
474 arr[num++] = 0x53; /* naa-5 ieee company id=0x333333 (fake) */
475 arr[num++] = 0x33;
476 arr[num++] = 0x33;
477 arr[num++] = 0x30;
478 arr[num++] = (dev_id_num >> 24);
479 arr[num++] = (dev_id_num >> 16) & 0xff;
480 arr[num++] = (dev_id_num >> 8) & 0xff;
481 arr[num++] = dev_id_num & 0xff;
482 /* Target relative port number */
483 arr[num++] = 0x61; /* proto=sas, binary */
484 arr[num++] = 0x94; /* PIV=1, target port, rel port */
485 arr[num++] = 0x0; /* reserved */
486 arr[num++] = 0x4; /* length */
487 arr[num++] = 0x0; /* reserved */
488 arr[num++] = 0x0; /* reserved */
489 arr[num++] = 0x0;
490 arr[num++] = 0x1; /* relative port A */
491 }
492 /* NAA-5, Target port identifier */
493 arr[num++] = 0x61; /* proto=sas, binary */
494 arr[num++] = 0x93; /* piv=1, target port, naa */
495 arr[num++] = 0x0;
496 arr[num++] = 0x8;
497 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
498 arr[num++] = 0x22;
499 arr[num++] = 0x22;
500 arr[num++] = 0x20;
501 arr[num++] = (port_a >> 24);
502 arr[num++] = (port_a >> 16) & 0xff;
503 arr[num++] = (port_a >> 8) & 0xff;
504 arr[num++] = port_a & 0xff;
5a09e398
HR		 505 /* NAA-5, Target port group identifier */
506 arr[num++] = 0x61; /* proto=sas, binary */
507 arr[num++] = 0x95; /* piv=1, target port group id */
508 arr[num++] = 0x0;
509 arr[num++] = 0x4;
510 arr[num++] = 0;
511 arr[num++] = 0;
512 arr[num++] = (port_group_id >> 8) & 0xff;
513 arr[num++] = port_group_id & 0xff;
c65b1445
DG		 514 /* NAA-5, Target device identifier */
515 arr[num++] = 0x61; /* proto=sas, binary */
516 arr[num++] = 0xa3; /* piv=1, target device, naa */
517 arr[num++] = 0x0;
518 arr[num++] = 0x8;
519 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
520 arr[num++] = 0x22;
521 arr[num++] = 0x22;
522 arr[num++] = 0x20;
523 arr[num++] = (target_dev_id >> 24);
524 arr[num++] = (target_dev_id >> 16) & 0xff;
525 arr[num++] = (target_dev_id >> 8) & 0xff;
526 arr[num++] = target_dev_id & 0xff;
527 /* SCSI name string: Target device identifier */
528 arr[num++] = 0x63; /* proto=sas, UTF-8 */
529 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
530 arr[num++] = 0x0;
531 arr[num++] = 24;
532 memcpy(arr + num, "naa.52222220", 12);
533 num += 12;
534 snprintf(b, sizeof(b), "%08X", target_dev_id);
535 memcpy(arr + num, b, 8);
536 num += 8;
537 memset(arr + num, 0, 4);
538 num += 4;
539 return num;
540}
541
542
543static unsigned char vpd84_data[] = {
544/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
545 0x22,0x22,0x22,0x0,0xbb,0x1,
546 0x22,0x22,0x22,0x0,0xbb,0x2,
547};
548
549static int inquiry_evpd_84(unsigned char * arr)
550{
551 memcpy(arr, vpd84_data, sizeof(vpd84_data));
552 return sizeof(vpd84_data);
553}
554
555static int inquiry_evpd_85(unsigned char * arr)
556{
557 int num = 0;
558 const char * na1 = "https://www.kernel.org/config";
559 const char * na2 = "http://www.kernel.org/log";
560 int plen, olen;
561
562 arr[num++] = 0x1; /* lu, storage config */
563 arr[num++] = 0x0; /* reserved */
564 arr[num++] = 0x0;
565 olen = strlen(na1);
566 plen = olen + 1;
567 if (plen % 4)
568 plen = ((plen / 4) + 1) * 4;
569 arr[num++] = plen; /* length, null termianted, padded */
570 memcpy(arr + num, na1, olen);
571 memset(arr + num + olen, 0, plen - olen);
572 num += plen;
573
574 arr[num++] = 0x4; /* lu, logging */
575 arr[num++] = 0x0; /* reserved */
576 arr[num++] = 0x0;
577 olen = strlen(na2);
578 plen = olen + 1;
579 if (plen % 4)
580 plen = ((plen / 4) + 1) * 4;
581 arr[num++] = plen; /* length, null terminated, padded */
582 memcpy(arr + num, na2, olen);
583 memset(arr + num + olen, 0, plen - olen);
584 num += plen;
585
586 return num;
587}
588
589/* SCSI ports VPD page */
590static int inquiry_evpd_88(unsigned char * arr, int target_dev_id)
591{
592 int num = 0;
593 int port_a, port_b;
594
595 port_a = target_dev_id + 1;
596 port_b = port_a + 1;
597 arr[num++] = 0x0; /* reserved */
598 arr[num++] = 0x0; /* reserved */
599 arr[num++] = 0x0;
600 arr[num++] = 0x1; /* relative port 1 (primary) */
601 memset(arr + num, 0, 6);
602 num += 6;
603 arr[num++] = 0x0;
604 arr[num++] = 12; /* length tp descriptor */
605 /* naa-5 target port identifier (A) */
606 arr[num++] = 0x61; /* proto=sas, binary */
607 arr[num++] = 0x93; /* PIV=1, target port, NAA */
608 arr[num++] = 0x0; /* reserved */
609 arr[num++] = 0x8; /* length */
610 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
611 arr[num++] = 0x22;
612 arr[num++] = 0x22;
613 arr[num++] = 0x20;
614 arr[num++] = (port_a >> 24);
615 arr[num++] = (port_a >> 16) & 0xff;
616 arr[num++] = (port_a >> 8) & 0xff;
617 arr[num++] = port_a & 0xff;
618
619 arr[num++] = 0x0; /* reserved */
620 arr[num++] = 0x0; /* reserved */
621 arr[num++] = 0x0;
622 arr[num++] = 0x2; /* relative port 2 (secondary) */
623 memset(arr + num, 0, 6);
624 num += 6;
625 arr[num++] = 0x0;
626 arr[num++] = 12; /* length tp descriptor */
627 /* naa-5 target port identifier (B) */
628 arr[num++] = 0x61; /* proto=sas, binary */
629 arr[num++] = 0x93; /* PIV=1, target port, NAA */
630 arr[num++] = 0x0; /* reserved */
631 arr[num++] = 0x8; /* length */
632 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
633 arr[num++] = 0x22;
634 arr[num++] = 0x22;
635 arr[num++] = 0x20;
636 arr[num++] = (port_b >> 24);
637 arr[num++] = (port_b >> 16) & 0xff;
638 arr[num++] = (port_b >> 8) & 0xff;
639 arr[num++] = port_b & 0xff;
640
641 return num;
642}
643
644
645static unsigned char vpd89_data[] = {
646/* from 4th byte */ 0,0,0,0,
647'l','i','n','u','x',' ',' ',' ',
648'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
649'1','2','3','4',
6500x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
6510xec,0,0,0,
6520x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
6530,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
6540x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
6550x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
6560x53,0x41,
6570x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
6580x20,0x20,
6590x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
6600x10,0x80,
6610,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
6620x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
6630x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
6640,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
6650x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
6660x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
6670,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
6680,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6690,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6700,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6710x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
6720,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
6730xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
6740,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
6750,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6760,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6770,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6780,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6790,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6800,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6810,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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,
6850,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6860,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
687};
688
689static int inquiry_evpd_89(unsigned char * arr)
690{
691 memcpy(arr, vpd89_data, sizeof(vpd89_data));
692 return sizeof(vpd89_data);
693}
694
695
1e49f785 696/* Block limits VPD page (SBC-3) */
c65b1445 697static unsigned char vpdb0_data[] = {
1e49f785
DG		 698 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
699 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
700 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
701 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
c65b1445
DG		 702};
703
704static int inquiry_evpd_b0(unsigned char * arr)
705{
ea61fca5
MP		 706 unsigned int gran;
707
c65b1445 708 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
e308b3d1
MP		 709
710 /* Optimal transfer length granularity */
ea61fca5
MP		 711 gran = 1 << scsi_debug_physblk_exp;
712 arr[2] = (gran >> 8) & 0xff;
713 arr[3] = gran & 0xff;
e308b3d1
MP		 714
715 /* Maximum Transfer Length */
c65b1445
DG		 716 if (sdebug_store_sectors > 0x400) {
717 arr[4] = (sdebug_store_sectors >> 24) & 0xff;
718 arr[5] = (sdebug_store_sectors >> 16) & 0xff;
719 arr[6] = (sdebug_store_sectors >> 8) & 0xff;
720 arr[7] = sdebug_store_sectors & 0xff;
721 }
44d92694 722
e308b3d1
MP		 723 /* Optimal Transfer Length */
724 put_unaligned_be32(scsi_debug_opt_blks, &arr[8]);
725
44d92694
MP		 726 if (scsi_debug_unmap_max_desc) {
727 unsigned int blocks;
728
729 if (scsi_debug_unmap_max_blocks)
730 blocks = scsi_debug_unmap_max_blocks;
731 else
732 blocks = 0xffffffff;
733
e308b3d1 734 /* Maximum Unmap LBA Count */
44d92694 735 put_unaligned_be32(blocks, &arr[16]);
e308b3d1
MP		 736
737 /* Maximum Unmap Block Descriptor Count */
44d92694
MP		 738 put_unaligned_be32(scsi_debug_unmap_max_desc, &arr[20]);
739 }
740
e308b3d1 741 /* Unmap Granularity Alignment */
44d92694
MP		 742 if (scsi_debug_unmap_alignment) {
743 put_unaligned_be32(scsi_debug_unmap_alignment, &arr[28]);
744 arr[28] |= 0x80; /* UGAVALID */
745 }
746
e308b3d1 747 /* Optimal Unmap Granularity */
44d92694
MP		 748 if (scsi_debug_unmap_granularity) {
749 put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]);
750 return 0x3c; /* Mandatory page length for thin provisioning */
751 }
752
c65b1445 753 return sizeof(vpdb0_data);
1da177e4
LT		 754}
755
1e49f785 756/* Block device characteristics VPD page (SBC-3) */
eac6e8e4
MW		 757static int inquiry_evpd_b1(unsigned char *arr)
758{
759 memset(arr, 0, 0x3c);
760 arr[0] = 0;
1e49f785
DG		 761 arr[1] = 1; /* non rotating medium (e.g. solid state) */
762 arr[2] = 0;
763 arr[3] = 5; /* less than 1.8" */
eac6e8e4
MW		 764
765 return 0x3c;
766}
1da177e4
LT		 767
768#define SDEBUG_LONG_INQ_SZ 96
c65b1445 769#define SDEBUG_MAX_INQ_ARR_SZ 584
1da177e4
LT		 770
771static int resp_inquiry(struct scsi_cmnd * scp, int target,
772 struct sdebug_dev_info * devip)
773{
774 unsigned char pq_pdt;
5a09e398 775 unsigned char * arr;
1da177e4 776 unsigned char *cmd = (unsigned char *)scp->cmnd;
5a09e398 777 int alloc_len, n, ret;
1da177e4
LT		 778
779 alloc_len = (cmd[3] << 8) + cmd[4];
6f3cbf55
DG		 780 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
781 if (! arr)
782 return DID_REQUEUE << 16;
c65b1445
DG		 783 if (devip->wlun)
784 pq_pdt = 0x1e; /* present, wlun */
785 else if (scsi_debug_no_lun_0 && (0 == devip->lun))
786 pq_pdt = 0x7f; /* not present, no device type */
787 else
788 pq_pdt = (scsi_debug_ptype & 0x1f);
1da177e4
LT		 789 arr[0] = pq_pdt;
790 if (0x2 & cmd[1]) { /* CMDDT bit set */
791 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
792 0);
5a09e398 793 kfree(arr);
1da177e4
LT		 794 return check_condition_result;
795 } else if (0x1 & cmd[1]) { /* EVPD bit set */
5a09e398 796 int lu_id_num, port_group_id, target_dev_id, len;
c65b1445
DG		 797 char lu_id_str[6];
798 int host_no = devip->sdbg_host->shost->host_no;
1da177e4 799
5a09e398
HR		 800 port_group_id = (((host_no + 1) & 0x7f) << 8) +
801 (devip->channel & 0x7f);
23183910
DG		 802 if (0 == scsi_debug_vpd_use_hostno)
803 host_no = 0;
c65b1445
DG		 804 lu_id_num = devip->wlun ? -1 : (((host_no + 1) * 2000) +
805 (devip->target * 1000) + devip->lun);
806 target_dev_id = ((host_no + 1) * 2000) +
807 (devip->target * 1000) - 3;
808 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
1da177e4 809 if (0 == cmd[2]) { /* supported vital product data pages */
c65b1445
DG		 810 arr[1] = cmd[2]; /*sanity */
811 n = 4;
812 arr[n++] = 0x0; /* this page */
813 arr[n++] = 0x80; /* unit serial number */
814 arr[n++] = 0x83; /* device identification */
815 arr[n++] = 0x84; /* software interface ident. */
816 arr[n++] = 0x85; /* management network addresses */
817 arr[n++] = 0x86; /* extended inquiry */
818 arr[n++] = 0x87; /* mode page policy */
819 arr[n++] = 0x88; /* SCSI ports */
820 arr[n++] = 0x89; /* ATA information */
821 arr[n++] = 0xb0; /* Block limits (SBC) */
eac6e8e4 822 arr[n++] = 0xb1; /* Block characteristics (SBC) */
c65b1445 823 arr[3] = n - 4; /* number of supported VPD pages */
1da177e4 824 } else if (0x80 == cmd[2]) { /* unit serial number */
c65b1445 825 arr[1] = cmd[2]; /*sanity */
1da177e4 826 arr[3] = len;
c65b1445 827 memcpy(&arr[4], lu_id_str, len);
1da177e4 828 } else if (0x83 == cmd[2]) { /* device identification */
c65b1445 829 arr[1] = cmd[2]; /*sanity */
5a09e398
HR		 830 arr[3] = inquiry_evpd_83(&arr[4], port_group_id,
831 target_dev_id, lu_id_num,
832 lu_id_str, len);
c65b1445
DG		 833 } else if (0x84 == cmd[2]) { /* Software interface ident. */
834 arr[1] = cmd[2]; /*sanity */
835 arr[3] = inquiry_evpd_84(&arr[4]);
836 } else if (0x85 == cmd[2]) { /* Management network addresses */
837 arr[1] = cmd[2]; /*sanity */
838 arr[3] = inquiry_evpd_85(&arr[4]);
839 } else if (0x86 == cmd[2]) { /* extended inquiry */
840 arr[1] = cmd[2]; /*sanity */
841 arr[3] = 0x3c; /* number of following entries */
c6a44287
MP		 842 if (scsi_debug_dif == SD_DIF_TYPE3_PROTECTION)
843 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
844 else if (scsi_debug_dif)
845 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
846 else
847 arr[4] = 0x0; /* no protection stuff */
c65b1445
DG		 848 arr[5] = 0x7; /* head of q, ordered + simple q's */
849 } else if (0x87 == cmd[2]) { /* mode page policy */
850 arr[1] = cmd[2]; /*sanity */
851 arr[3] = 0x8; /* number of following entries */
852 arr[4] = 0x2; /* disconnect-reconnect mp */
853 arr[6] = 0x80; /* mlus, shared */
854 arr[8] = 0x18; /* protocol specific lu */
855 arr[10] = 0x82; /* mlus, per initiator port */
856 } else if (0x88 == cmd[2]) { /* SCSI Ports */
857 arr[1] = cmd[2]; /*sanity */
858 arr[3] = inquiry_evpd_88(&arr[4], target_dev_id);
859 } else if (0x89 == cmd[2]) { /* ATA information */
860 arr[1] = cmd[2]; /*sanity */
861 n = inquiry_evpd_89(&arr[4]);
862 arr[2] = (n >> 8);
863 arr[3] = (n & 0xff);
864 } else if (0xb0 == cmd[2]) { /* Block limits (SBC) */
865 arr[1] = cmd[2]; /*sanity */
866 arr[3] = inquiry_evpd_b0(&arr[4]);
eac6e8e4
MW		 867 } else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */
868 arr[1] = cmd[2]; /*sanity */
869 arr[3] = inquiry_evpd_b1(&arr[4]);
1da177e4
LT		 870 } else {
871 /* Illegal request, invalid field in cdb */
872 mk_sense_buffer(devip, ILLEGAL_REQUEST,
873 INVALID_FIELD_IN_CDB, 0);
5a09e398 874 kfree(arr);
1da177e4
LT		 875 return check_condition_result;
876 }
c65b1445 877 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
5a09e398 878 ret = fill_from_dev_buffer(scp, arr,
c65b1445 879 min(len, SDEBUG_MAX_INQ_ARR_SZ));
5a09e398
HR		 880 kfree(arr);
881 return ret;
1da177e4
LT		 882 }
883 /* drops through here for a standard inquiry */
884 arr[1] = DEV_REMOVEABLE(target) ? 0x80 : 0; /* Removable disk */
885 arr[2] = scsi_debug_scsi_level;
886 arr[3] = 2; /* response_data_format==2 */
887 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
c6a44287 888 arr[5] = scsi_debug_dif ? 1 : 0; /* PROTECT bit */
5a09e398
HR		 889 if (0 == scsi_debug_vpd_use_hostno)
890 arr[5] = 0x10; /* claim: implicit TGPS */
c65b1445 891 arr[6] = 0x10; /* claim: MultiP */
1da177e4 892 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
c65b1445 893 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
1da177e4
LT		 894 memcpy(&arr[8], inq_vendor_id, 8);
895 memcpy(&arr[16], inq_product_id, 16);
896 memcpy(&arr[32], inq_product_rev, 4);
897 /* version descriptors (2 bytes each) follow */
c65b1445
DG		 898 arr[58] = 0x0; arr[59] = 0x77; /* SAM-3 ANSI */
899 arr[60] = 0x3; arr[61] = 0x14; /* SPC-3 ANSI */
900 n = 62;
1da177e4 901 if (scsi_debug_ptype == 0) {
c65b1445 902 arr[n++] = 0x3; arr[n++] = 0x3d; /* SBC-2 ANSI */
1da177e4 903 } else if (scsi_debug_ptype == 1) {
c65b1445 904 arr[n++] = 0x3; arr[n++] = 0x60; /* SSC-2 no version */
1da177e4 905 }
c65b1445 906 arr[n++] = 0xc; arr[n++] = 0xf; /* SAS-1.1 rev 10 */
5a09e398 907 ret = fill_from_dev_buffer(scp, arr,
1da177e4 908 min(alloc_len, SDEBUG_LONG_INQ_SZ));
5a09e398
HR		 909 kfree(arr);
910 return ret;
1da177e4
LT		 911}
912
913static int resp_requests(struct scsi_cmnd * scp,
914 struct sdebug_dev_info * devip)
915{
916 unsigned char * sbuff;
917 unsigned char *cmd = (unsigned char *)scp->cmnd;
918 unsigned char arr[SDEBUG_SENSE_LEN];
c65b1445 919 int want_dsense;
1da177e4
LT		 920 int len = 18;
921
c65b1445 922 memset(arr, 0, sizeof(arr));
1da177e4 923 if (devip->reset == 1)
c65b1445
DG		 924 mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0);
925 want_dsense = !!(cmd[1] & 1) || scsi_debug_dsense;
1da177e4 926 sbuff = devip->sense_buff;
c65b1445
DG		 927 if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
928 if (want_dsense) {
929 arr[0] = 0x72;
930 arr[1] = 0x0; /* NO_SENSE in sense_key */
931 arr[2] = THRESHOLD_EXCEEDED;
932 arr[3] = 0xff; /* TEST set and MRIE==6 */
933 } else {
934 arr[0] = 0x70;
935 arr[2] = 0x0; /* NO_SENSE in sense_key */
936 arr[7] = 0xa; /* 18 byte sense buffer */
937 arr[12] = THRESHOLD_EXCEEDED;
938 arr[13] = 0xff; /* TEST set and MRIE==6 */
939 }
c65b1445 940 } else {
1da177e4 941 memcpy(arr, sbuff, SDEBUG_SENSE_LEN);
c65b1445
DG		 942 if ((cmd[1] & 1) && (! scsi_debug_dsense)) {
943 /* DESC bit set and sense_buff in fixed format */
944 memset(arr, 0, sizeof(arr));
945 arr[0] = 0x72;
946 arr[1] = sbuff[2]; /* sense key */
947 arr[2] = sbuff[12]; /* asc */
948 arr[3] = sbuff[13]; /* ascq */
949 len = 8;
950 }
951 }
952 mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0);
1da177e4
LT		 953 return fill_from_dev_buffer(scp, arr, len);
954}
955
c65b1445
DG		 956static int resp_start_stop(struct scsi_cmnd * scp,
957 struct sdebug_dev_info * devip)
958{
959 unsigned char *cmd = (unsigned char *)scp->cmnd;
960 int power_cond, errsts, start;
961
962 if ((errsts = check_readiness(scp, 1, devip)))
963 return errsts;
964 power_cond = (cmd[4] & 0xf0) >> 4;
965 if (power_cond) {
966 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
967 0);
968 return check_condition_result;
969 }
970 start = cmd[4] & 1;
971 if (start == devip->stopped)
972 devip->stopped = !start;
973 return 0;
974}
975
28898873
FT		 976static sector_t get_sdebug_capacity(void)
977{
978 if (scsi_debug_virtual_gb > 0)
5447ed6c
DG		 979 return (sector_t)scsi_debug_virtual_gb *
980 (1073741824 / scsi_debug_sector_size);
28898873
FT		 981 else
982 return sdebug_store_sectors;
983}
984
1da177e4
LT		 985#define SDEBUG_READCAP_ARR_SZ 8
986static int resp_readcap(struct scsi_cmnd * scp,
987 struct sdebug_dev_info * devip)
988{
989 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
c65b1445 990 unsigned int capac;
1da177e4
LT		 991 int errsts;
992
c65b1445 993 if ((errsts = check_readiness(scp, 1, devip)))
1da177e4 994 return errsts;
c65b1445 995 /* following just in case virtual_gb changed */
28898873 996 sdebug_capacity = get_sdebug_capacity();
1da177e4 997 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
c65b1445
DG		 998 if (sdebug_capacity < 0xffffffff) {
999 capac = (unsigned int)sdebug_capacity - 1;
1000 arr[0] = (capac >> 24);
1001 arr[1] = (capac >> 16) & 0xff;
1002 arr[2] = (capac >> 8) & 0xff;
1003 arr[3] = capac & 0xff;
1004 } else {
1005 arr[0] = 0xff;
1006 arr[1] = 0xff;
1007 arr[2] = 0xff;
1008 arr[3] = 0xff;
1009 }
597136ab
MP		 1010 arr[6] = (scsi_debug_sector_size >> 8) & 0xff;
1011 arr[7] = scsi_debug_sector_size & 0xff;
1da177e4
LT		 1012 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1013}
1014
c65b1445
DG		 1015#define SDEBUG_READCAP16_ARR_SZ 32
1016static int resp_readcap16(struct scsi_cmnd * scp,
1017 struct sdebug_dev_info * devip)
1018{
1019 unsigned char *cmd = (unsigned char *)scp->cmnd;
1020 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
1021 unsigned long long capac;
1022 int errsts, k, alloc_len;
1023
1024 if ((errsts = check_readiness(scp, 1, devip)))
1025 return errsts;
1026 alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8)
1027 + cmd[13]);
1028 /* following just in case virtual_gb changed */
28898873 1029 sdebug_capacity = get_sdebug_capacity();
c65b1445
DG		 1030 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
1031 capac = sdebug_capacity - 1;
1032 for (k = 0; k < 8; ++k, capac >>= 8)
1033 arr[7 - k] = capac & 0xff;
597136ab
MP		 1034 arr[8] = (scsi_debug_sector_size >> 24) & 0xff;
1035 arr[9] = (scsi_debug_sector_size >> 16) & 0xff;
1036 arr[10] = (scsi_debug_sector_size >> 8) & 0xff;
1037 arr[11] = scsi_debug_sector_size & 0xff;
ea61fca5
MP		 1038 arr[13] = scsi_debug_physblk_exp & 0xf;
1039 arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f;
44d92694
MP		 1040
1041 if (scsi_debug_unmap_granularity)
1042 arr[14] |= 0x80; /* TPE */
1043
ea61fca5 1044 arr[15] = scsi_debug_lowest_aligned & 0xff;
c6a44287
MP		 1045
1046 if (scsi_debug_dif) {
1047 arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */
1048 arr[12] |= 1; /* PROT_EN */
1049 }
1050
c65b1445
DG		 1051 return fill_from_dev_buffer(scp, arr,
1052 min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
1053}
1054
5a09e398
HR		 1055#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1056
1057static int resp_report_tgtpgs(struct scsi_cmnd * scp,
1058 struct sdebug_dev_info * devip)
1059{
1060 unsigned char *cmd = (unsigned char *)scp->cmnd;
1061 unsigned char * arr;
1062 int host_no = devip->sdbg_host->shost->host_no;
1063 int n, ret, alen, rlen;
1064 int port_group_a, port_group_b, port_a, port_b;
1065
1066 alen = ((cmd[6] << 24) + (cmd[7] << 16) + (cmd[8] << 8)
1067 + cmd[9]);
1068
6f3cbf55
DG		 1069 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1070 if (! arr)
1071 return DID_REQUEUE << 16;
5a09e398
HR		 1072 /*
1073 * EVPD page 0x88 states we have two ports, one
1074 * real and a fake port with no device connected.
1075 * So we create two port groups with one port each
1076 * and set the group with port B to unavailable.
1077 */
1078 port_a = 0x1; /* relative port A */
1079 port_b = 0x2; /* relative port B */
1080 port_group_a = (((host_no + 1) & 0x7f) << 8) +
1081 (devip->channel & 0x7f);
1082 port_group_b = (((host_no + 1) & 0x7f) << 8) +
1083 (devip->channel & 0x7f) + 0x80;
1084
1085 /*
1086 * The asymmetric access state is cycled according to the host_id.
1087 */
1088 n = 4;
1089 if (0 == scsi_debug_vpd_use_hostno) {
1090 arr[n++] = host_no % 3; /* Asymm access state */
1091 arr[n++] = 0x0F; /* claim: all states are supported */
1092 } else {
1093 arr[n++] = 0x0; /* Active/Optimized path */
1094 arr[n++] = 0x01; /* claim: only support active/optimized paths */
1095 }
1096 arr[n++] = (port_group_a >> 8) & 0xff;
1097 arr[n++] = port_group_a & 0xff;
1098 arr[n++] = 0; /* Reserved */
1099 arr[n++] = 0; /* Status code */
1100 arr[n++] = 0; /* Vendor unique */
1101 arr[n++] = 0x1; /* One port per group */
1102 arr[n++] = 0; /* Reserved */
1103 arr[n++] = 0; /* Reserved */
1104 arr[n++] = (port_a >> 8) & 0xff;
1105 arr[n++] = port_a & 0xff;
1106 arr[n++] = 3; /* Port unavailable */
1107 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
1108 arr[n++] = (port_group_b >> 8) & 0xff;
1109 arr[n++] = port_group_b & 0xff;
1110 arr[n++] = 0; /* Reserved */
1111 arr[n++] = 0; /* Status code */
1112 arr[n++] = 0; /* Vendor unique */
1113 arr[n++] = 0x1; /* One port per group */
1114 arr[n++] = 0; /* Reserved */
1115 arr[n++] = 0; /* Reserved */
1116 arr[n++] = (port_b >> 8) & 0xff;
1117 arr[n++] = port_b & 0xff;
1118
1119 rlen = n - 4;
1120 arr[0] = (rlen >> 24) & 0xff;
1121 arr[1] = (rlen >> 16) & 0xff;
1122 arr[2] = (rlen >> 8) & 0xff;
1123 arr[3] = rlen & 0xff;
1124
1125 /*
1126 * Return the smallest value of either
1127 * - The allocated length
1128 * - The constructed command length
1129 * - The maximum array size
1130 */
1131 rlen = min(alen,n);
1132 ret = fill_from_dev_buffer(scp, arr,
1133 min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1134 kfree(arr);
1135 return ret;
1136}
1137
1da177e4
LT		 1138/* <<Following mode page info copied from ST318451LW>> */
1139
1140static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target)
1141{ /* Read-Write Error Recovery page for mode_sense */
1142 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
1143 5, 0, 0xff, 0xff};
1144
1145 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
1146 if (1 == pcontrol)
1147 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
1148 return sizeof(err_recov_pg);
1149}
1150
1151static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target)
1152{ /* Disconnect-Reconnect page for mode_sense */
1153 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
1154 0, 0, 0, 0, 0, 0, 0, 0};
1155
1156 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
1157 if (1 == pcontrol)
1158 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
1159 return sizeof(disconnect_pg);
1160}
1161
1162static int resp_format_pg(unsigned char * p, int pcontrol, int target)
1163{ /* Format device page for mode_sense */
597136ab
MP		 1164 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
1165 0, 0, 0, 0, 0, 0, 0, 0,
1166 0, 0, 0, 0, 0x40, 0, 0, 0};
1167
1168 memcpy(p, format_pg, sizeof(format_pg));
1169 p[10] = (sdebug_sectors_per >> 8) & 0xff;
1170 p[11] = sdebug_sectors_per & 0xff;
1171 p[12] = (scsi_debug_sector_size >> 8) & 0xff;
1172 p[13] = scsi_debug_sector_size & 0xff;
1173 if (DEV_REMOVEABLE(target))
1174 p[20] |= 0x20; /* should agree with INQUIRY */
1175 if (1 == pcontrol)
1176 memset(p + 2, 0, sizeof(format_pg) - 2);
1177 return sizeof(format_pg);
1da177e4
LT		 1178}
1179
1180static int resp_caching_pg(unsigned char * p, int pcontrol, int target)
1181{ /* Caching page for mode_sense */
1182 unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
1183 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
1184
1185 memcpy(p, caching_pg, sizeof(caching_pg));
1186 if (1 == pcontrol)
1187 memset(p + 2, 0, sizeof(caching_pg) - 2);
1188 return sizeof(caching_pg);
1189}
1190
1191static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
1192{ /* Control mode page for mode_sense */
c65b1445
DG		 1193 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
1194 0, 0, 0, 0};
1195 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
1da177e4
LT		 1196 0, 0, 0x2, 0x4b};
1197
1198 if (scsi_debug_dsense)
1199 ctrl_m_pg[2] |= 0x4;
c65b1445
DG		 1200 else
1201 ctrl_m_pg[2] &= ~0x4;
c6a44287
MP		 1202
1203 if (scsi_debug_ato)
1204 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
1205
1da177e4
LT		 1206 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
1207 if (1 == pcontrol)
c65b1445
DG		 1208 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
1209 else if (2 == pcontrol)
1210 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
1da177e4
LT		 1211 return sizeof(ctrl_m_pg);
1212}
1213
c65b1445 1214
1da177e4
LT		 1215static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target)
1216{ /* Informational Exceptions control mode page for mode_sense */
c65b1445
DG		 1217 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
1218 0, 0, 0x0, 0x0};
1219 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1220 0, 0, 0x0, 0x0};
1221
1da177e4
LT		 1222 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
1223 if (1 == pcontrol)
c65b1445
DG		 1224 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
1225 else if (2 == pcontrol)
1226 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
1da177e4
LT		 1227 return sizeof(iec_m_pg);
1228}
1229
c65b1445
DG		 1230static int resp_sas_sf_m_pg(unsigned char * p, int pcontrol, int target)
1231{ /* SAS SSP mode page - short format for mode_sense */
1232 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
1233 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
1234
1235 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
1236 if (1 == pcontrol)
1237 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
1238 return sizeof(sas_sf_m_pg);
1239}
1240
1241
1242static int resp_sas_pcd_m_spg(unsigned char * p, int pcontrol, int target,
1243 int target_dev_id)
1244{ /* SAS phy control and discover mode page for mode_sense */
1245 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
1246 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
1247 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1248 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1249 0x2, 0, 0, 0, 0, 0, 0, 0,
1250 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1251 0, 0, 0, 0, 0, 0, 0, 0,
1252 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
1253 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1254 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1255 0x3, 0, 0, 0, 0, 0, 0, 0,
1256 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1257 0, 0, 0, 0, 0, 0, 0, 0,
1258 };
1259 int port_a, port_b;
1260
1261 port_a = target_dev_id + 1;
1262 port_b = port_a + 1;
1263 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
1264 p[20] = (port_a >> 24);
1265 p[21] = (port_a >> 16) & 0xff;
1266 p[22] = (port_a >> 8) & 0xff;
1267 p[23] = port_a & 0xff;
1268 p[48 + 20] = (port_b >> 24);
1269 p[48 + 21] = (port_b >> 16) & 0xff;
1270 p[48 + 22] = (port_b >> 8) & 0xff;
1271 p[48 + 23] = port_b & 0xff;
1272 if (1 == pcontrol)
1273 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
1274 return sizeof(sas_pcd_m_pg);
1275}
1276
1277static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol)
1278{ /* SAS SSP shared protocol specific port mode subpage */
1279 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
1280 0, 0, 0, 0, 0, 0, 0, 0,
1281 };
1282
1283 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
1284 if (1 == pcontrol)
1285 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
1286 return sizeof(sas_sha_m_pg);
1287}
1288
1da177e4
LT		 1289#define SDEBUG_MAX_MSENSE_SZ 256
1290
1291static int resp_mode_sense(struct scsi_cmnd * scp, int target,
1292 struct sdebug_dev_info * devip)
1293{
23183910
DG		 1294 unsigned char dbd, llbaa;
1295 int pcontrol, pcode, subpcode, bd_len;
1da177e4 1296 unsigned char dev_spec;
23183910 1297 int k, alloc_len, msense_6, offset, len, errsts, target_dev_id;
1da177e4
LT		 1298 unsigned char * ap;
1299 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
1300 unsigned char *cmd = (unsigned char *)scp->cmnd;
1301
c65b1445 1302 if ((errsts = check_readiness(scp, 1, devip)))
1da177e4 1303 return errsts;
23183910 1304 dbd = !!(cmd[1] & 0x8);
1da177e4
LT		 1305 pcontrol = (cmd[2] & 0xc0) >> 6;
1306 pcode = cmd[2] & 0x3f;
1307 subpcode = cmd[3];
1308 msense_6 = (MODE_SENSE == cmd[0]);
23183910
DG		 1309 llbaa = msense_6 ? 0 : !!(cmd[1] & 0x10);
1310 if ((0 == scsi_debug_ptype) && (0 == dbd))
1311 bd_len = llbaa ? 16 : 8;
1312 else
1313 bd_len = 0;
1da177e4
LT		 1314 alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]);
1315 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
1316 if (0x3 == pcontrol) { /* Saving values not supported */
1317 mk_sense_buffer(devip, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP,
1318 0);
1319 return check_condition_result;
1320 }
c65b1445
DG		 1321 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
1322 (devip->target * 1000) - 3;
23183910
DG		 1323 /* set DPOFUA bit for disks */
1324 if (0 == scsi_debug_ptype)
1325 dev_spec = (DEV_READONLY(target) ? 0x80 : 0x0) | 0x10;
1326 else
1327 dev_spec = 0x0;
1da177e4
LT		 1328 if (msense_6) {
1329 arr[2] = dev_spec;
23183910 1330 arr[3] = bd_len;
1da177e4
LT		 1331 offset = 4;
1332 } else {
1333 arr[3] = dev_spec;
23183910
DG		 1334 if (16 == bd_len)
1335 arr[4] = 0x1; /* set LONGLBA bit */
1336 arr[7] = bd_len; /* assume 255 or less */
1da177e4
LT		 1337 offset = 8;
1338 }
1339 ap = arr + offset;
28898873
FT		 1340 if ((bd_len > 0) && (!sdebug_capacity))
1341 sdebug_capacity = get_sdebug_capacity();
1342
23183910
DG		 1343 if (8 == bd_len) {
1344 if (sdebug_capacity > 0xfffffffe) {
1345 ap[0] = 0xff;
1346 ap[1] = 0xff;
1347 ap[2] = 0xff;
1348 ap[3] = 0xff;
1349 } else {
1350 ap[0] = (sdebug_capacity >> 24) & 0xff;
1351 ap[1] = (sdebug_capacity >> 16) & 0xff;
1352 ap[2] = (sdebug_capacity >> 8) & 0xff;
1353 ap[3] = sdebug_capacity & 0xff;
1354 }
597136ab
MP		 1355 ap[6] = (scsi_debug_sector_size >> 8) & 0xff;
1356 ap[7] = scsi_debug_sector_size & 0xff;
23183910
DG		 1357 offset += bd_len;
1358 ap = arr + offset;
1359 } else if (16 == bd_len) {
1360 unsigned long long capac = sdebug_capacity;
1361
1362 for (k = 0; k < 8; ++k, capac >>= 8)
1363 ap[7 - k] = capac & 0xff;
597136ab
MP		 1364 ap[12] = (scsi_debug_sector_size >> 24) & 0xff;
1365 ap[13] = (scsi_debug_sector_size >> 16) & 0xff;
1366 ap[14] = (scsi_debug_sector_size >> 8) & 0xff;
1367 ap[15] = scsi_debug_sector_size & 0xff;
23183910
DG		 1368 offset += bd_len;
1369 ap = arr + offset;
1370 }
1da177e4 1371
c65b1445
DG		 1372 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
1373 /* TODO: Control Extension page */
1da177e4
LT		 1374 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
1375 0);
1376 return check_condition_result;
1377 }
1378 switch (pcode) {
1379 case 0x1: /* Read-Write error recovery page, direct access */
1380 len = resp_err_recov_pg(ap, pcontrol, target);
1381 offset += len;
1382 break;
1383 case 0x2: /* Disconnect-Reconnect page, all devices */
1384 len = resp_disconnect_pg(ap, pcontrol, target);
1385 offset += len;
1386 break;
1387 case 0x3: /* Format device page, direct access */
1388 len = resp_format_pg(ap, pcontrol, target);
1389 offset += len;
1390 break;
1391 case 0x8: /* Caching page, direct access */
1392 len = resp_caching_pg(ap, pcontrol, target);
1393 offset += len;
1394 break;
1395 case 0xa: /* Control Mode page, all devices */
1396 len = resp_ctrl_m_pg(ap, pcontrol, target);
1397 offset += len;
1398 break;
c65b1445
DG		 1399 case 0x19: /* if spc==1 then sas phy, control+discover */
1400 if ((subpcode > 0x2) && (subpcode < 0xff)) {
1401 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1402 INVALID_FIELD_IN_CDB, 0);
1403 return check_condition_result;
1404 }
1405 len = 0;
1406 if ((0x0 == subpcode) || (0xff == subpcode))
1407 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
1408 if ((0x1 == subpcode) || (0xff == subpcode))
1409 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
1410 target_dev_id);
1411 if ((0x2 == subpcode) || (0xff == subpcode))
1412 len += resp_sas_sha_m_spg(ap + len, pcontrol);
1413 offset += len;
1414 break;
1da177e4
LT		 1415 case 0x1c: /* Informational Exceptions Mode page, all devices */
1416 len = resp_iec_m_pg(ap, pcontrol, target);
1417 offset += len;
1418 break;
1419 case 0x3f: /* Read all Mode pages */
c65b1445
DG		 1420 if ((0 == subpcode) || (0xff == subpcode)) {
1421 len = resp_err_recov_pg(ap, pcontrol, target);
1422 len += resp_disconnect_pg(ap + len, pcontrol, target);
1423 len += resp_format_pg(ap + len, pcontrol, target);
1424 len += resp_caching_pg(ap + len, pcontrol, target);
1425 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
1426 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
1427 if (0xff == subpcode) {
1428 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
1429 target, target_dev_id);
1430 len += resp_sas_sha_m_spg(ap + len, pcontrol);
1431 }
1432 len += resp_iec_m_pg(ap + len, pcontrol, target);
1433 } else {
1434 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1435 INVALID_FIELD_IN_CDB, 0);
1436 return check_condition_result;
1437 }
1da177e4
LT		 1438 offset += len;
1439 break;
1440 default:
1441 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
1442 0);
1443 return check_condition_result;
1444 }
1445 if (msense_6)
1446 arr[0] = offset - 1;
1447 else {
1448 arr[0] = ((offset - 2) >> 8) & 0xff;
1449 arr[1] = (offset - 2) & 0xff;
1450 }
1451 return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
1452}
1453
c65b1445
DG		 1454#define SDEBUG_MAX_MSELECT_SZ 512
1455
1456static int resp_mode_select(struct scsi_cmnd * scp, int mselect6,
1457 struct sdebug_dev_info * devip)
1458{
1459 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
1460 int param_len, res, errsts, mpage;
1461 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
1462 unsigned char *cmd = (unsigned char *)scp->cmnd;
1463
1464 if ((errsts = check_readiness(scp, 1, devip)))
1465 return errsts;
1466 memset(arr, 0, sizeof(arr));
1467 pf = cmd[1] & 0x10;
1468 sp = cmd[1] & 0x1;
1469 param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]);
1470 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
1471 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1472 INVALID_FIELD_IN_CDB, 0);
1473 return check_condition_result;
1474 }
1475 res = fetch_to_dev_buffer(scp, arr, param_len);
1476 if (-1 == res)
1477 return (DID_ERROR << 16);
1478 else if ((res < param_len) &&
1479 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
1480 printk(KERN_INFO "scsi_debug: mode_select: cdb indicated=%d, "
1481 " IO sent=%d bytes\n", param_len, res);
1482 md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2);
1483 bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]);
23183910 1484 if (md_len > 2) {
c65b1445
DG		 1485 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1486 INVALID_FIELD_IN_PARAM_LIST, 0);
1487 return check_condition_result;
1488 }
1489 off = bd_len + (mselect6 ? 4 : 8);
1490 mpage = arr[off] & 0x3f;
1491 ps = !!(arr[off] & 0x80);
1492 if (ps) {
1493 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1494 INVALID_FIELD_IN_PARAM_LIST, 0);
1495 return check_condition_result;
1496 }
1497 spf = !!(arr[off] & 0x40);
1498 pg_len = spf ? ((arr[off + 2] << 8) + arr[off + 3] + 4) :
1499 (arr[off + 1] + 2);
1500 if ((pg_len + off) > param_len) {
1501 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1502 PARAMETER_LIST_LENGTH_ERR, 0);
1503 return check_condition_result;
1504 }
1505 switch (mpage) {
1506 case 0xa: /* Control Mode page */
1507 if (ctrl_m_pg[1] == arr[off + 1]) {
1508 memcpy(ctrl_m_pg + 2, arr + off + 2,
1509 sizeof(ctrl_m_pg) - 2);
1510 scsi_debug_dsense = !!(ctrl_m_pg[2] & 0x4);
1511 return 0;
1512 }
1513 break;
1514 case 0x1c: /* Informational Exceptions Mode page */
1515 if (iec_m_pg[1] == arr[off + 1]) {
1516 memcpy(iec_m_pg + 2, arr + off + 2,
1517 sizeof(iec_m_pg) - 2);
1518 return 0;
1519 }
1520 break;
1521 default:
1522 break;
1523 }
1524 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1525 INVALID_FIELD_IN_PARAM_LIST, 0);
1526 return check_condition_result;
1527}
1528
1529static int resp_temp_l_pg(unsigned char * arr)
1530{
1531 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
1532 0x0, 0x1, 0x3, 0x2, 0x0, 65,
1533 };
1534
1535 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
1536 return sizeof(temp_l_pg);
1537}
1538
1539static int resp_ie_l_pg(unsigned char * arr)
1540{
1541 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
1542 };
1543
1544 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
1545 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
1546 arr[4] = THRESHOLD_EXCEEDED;
1547 arr[5] = 0xff;
1548 }
1549 return sizeof(ie_l_pg);
1550}
1551
1552#define SDEBUG_MAX_LSENSE_SZ 512
1553
1554static int resp_log_sense(struct scsi_cmnd * scp,
1555 struct sdebug_dev_info * devip)
1556{
23183910 1557 int ppc, sp, pcontrol, pcode, subpcode, alloc_len, errsts, len, n;
c65b1445
DG		 1558 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
1559 unsigned char *cmd = (unsigned char *)scp->cmnd;
1560
1561 if ((errsts = check_readiness(scp, 1, devip)))
1562 return errsts;
1563 memset(arr, 0, sizeof(arr));
1564 ppc = cmd[1] & 0x2;
1565 sp = cmd[1] & 0x1;
1566 if (ppc || sp) {
1567 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1568 INVALID_FIELD_IN_CDB, 0);
1569 return check_condition_result;
1570 }
1571 pcontrol = (cmd[2] & 0xc0) >> 6;
1572 pcode = cmd[2] & 0x3f;
23183910 1573 subpcode = cmd[3] & 0xff;
c65b1445
DG		 1574 alloc_len = (cmd[7] << 8) + cmd[8];
1575 arr[0] = pcode;
23183910
DG		 1576 if (0 == subpcode) {
1577 switch (pcode) {
1578 case 0x0: /* Supported log pages log page */
1579 n = 4;
1580 arr[n++] = 0x0; /* this page */
1581 arr[n++] = 0xd; /* Temperature */
1582 arr[n++] = 0x2f; /* Informational exceptions */
1583 arr[3] = n - 4;
1584 break;
1585 case 0xd: /* Temperature log page */
1586 arr[3] = resp_temp_l_pg(arr + 4);
1587 break;
1588 case 0x2f: /* Informational exceptions log page */
1589 arr[3] = resp_ie_l_pg(arr + 4);
1590 break;
1591 default:
1592 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1593 INVALID_FIELD_IN_CDB, 0);
1594 return check_condition_result;
1595 }
1596 } else if (0xff == subpcode) {
1597 arr[0] |= 0x40;
1598 arr[1] = subpcode;
1599 switch (pcode) {
1600 case 0x0: /* Supported log pages and subpages log page */
1601 n = 4;
1602 arr[n++] = 0x0;
1603 arr[n++] = 0x0; /* 0,0 page */
1604 arr[n++] = 0x0;
1605 arr[n++] = 0xff; /* this page */
1606 arr[n++] = 0xd;
1607 arr[n++] = 0x0; /* Temperature */
1608 arr[n++] = 0x2f;
1609 arr[n++] = 0x0; /* Informational exceptions */
1610 arr[3] = n - 4;
1611 break;
1612 case 0xd: /* Temperature subpages */
1613 n = 4;
1614 arr[n++] = 0xd;
1615 arr[n++] = 0x0; /* Temperature */
1616 arr[3] = n - 4;
1617 break;
1618 case 0x2f: /* Informational exceptions subpages */
1619 n = 4;
1620 arr[n++] = 0x2f;
1621 arr[n++] = 0x0; /* Informational exceptions */
1622 arr[3] = n - 4;
1623 break;
1624 default:
1625 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1626 INVALID_FIELD_IN_CDB, 0);
1627 return check_condition_result;
1628 }
1629 } else {
c65b1445
DG		 1630 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1631 INVALID_FIELD_IN_CDB, 0);
1632 return check_condition_result;
1633 }
1634 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
1635 return fill_from_dev_buffer(scp, arr,
1636 min(len, SDEBUG_MAX_INQ_ARR_SZ));
1637}
1638
19789100
FT		 1639static int check_device_access_params(struct sdebug_dev_info *devi,
1640 unsigned long long lba, unsigned int num)
1da177e4 1641{
c65b1445 1642 if (lba + num > sdebug_capacity) {
19789100 1643 mk_sense_buffer(devi, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE, 0);
1da177e4
LT		 1644 return check_condition_result;
1645 }
c65b1445
DG		 1646 /* transfer length excessive (tie in to block limits VPD page) */
1647 if (num > sdebug_store_sectors) {
19789100 1648 mk_sense_buffer(devi, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
c65b1445
DG		 1649 return check_condition_result;
1650 }
19789100
FT		 1651 return 0;
1652}
1653
1654static int do_device_access(struct scsi_cmnd *scmd,
1655 struct sdebug_dev_info *devi,
1656 unsigned long long lba, unsigned int num, int write)
1657{
1658 int ret;
1659 unsigned int block, rest = 0;
1660 int (*func)(struct scsi_cmnd *, unsigned char *, int);
1661
1662 func = write ? fetch_to_dev_buffer : fill_from_dev_buffer;
1663
1664 block = do_div(lba, sdebug_store_sectors);
1665 if (block + num > sdebug_store_sectors)
1666 rest = block + num - sdebug_store_sectors;
1667
597136ab
MP		 1668 ret = func(scmd, fake_storep + (block * scsi_debug_sector_size),
1669 (num - rest) * scsi_debug_sector_size);
19789100 1670 if (!ret && rest)
597136ab 1671 ret = func(scmd, fake_storep, rest * scsi_debug_sector_size);
19789100
FT		 1672
1673 return ret;
1674}
1675
c6a44287 1676static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
395cef03 1677 unsigned int sectors, u32 ei_lba)
c6a44287
MP		 1678{
1679 unsigned int i, resid;
1680 struct scatterlist *psgl;
1681 struct sd_dif_tuple *sdt;
1682 sector_t sector;
1683 sector_t tmp_sec = start_sec;
1684 void *paddr;
1685
1686 start_sec = do_div(tmp_sec, sdebug_store_sectors);
1687
1688 sdt = (struct sd_dif_tuple *)(dif_storep + dif_offset(start_sec));
1689
1690 for (i = 0 ; i < sectors ; i++) {
1691 u16 csum;
1692
1693 if (sdt[i].app_tag == 0xffff)
1694 continue;
1695
1696 sector = start_sec + i;
1697
1698 switch (scsi_debug_guard) {
1699 case 1:
1700 csum = ip_compute_csum(fake_storep +
1701 sector * scsi_debug_sector_size,
1702 scsi_debug_sector_size);
1703 break;
1704 case 0:
1705 csum = crc_t10dif(fake_storep +
1706 sector * scsi_debug_sector_size,
1707 scsi_debug_sector_size);
1708 csum = cpu_to_be16(csum);
1709 break;
1710 default:
1711 BUG();
1712 }
1713
1714 if (sdt[i].guard_tag != csum) {
1715 printk(KERN_ERR "%s: GUARD check failed on sector %lu" \
1716 " rcvd 0x%04x, data 0x%04x\n", __func__,
1717 (unsigned long)sector,
1718 be16_to_cpu(sdt[i].guard_tag),
1719 be16_to_cpu(csum));
1720 dif_errors++;
1721 return 0x01;
1722 }
1723
395cef03 1724 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION &&
c6a44287
MP		 1725 be32_to_cpu(sdt[i].ref_tag) != (sector & 0xffffffff)) {
1726 printk(KERN_ERR "%s: REF check failed on sector %lu\n",
1727 __func__, (unsigned long)sector);
1728 dif_errors++;
1729 return 0x03;
1730 }
395cef03
MP		 1731
1732 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
1733 be32_to_cpu(sdt[i].ref_tag) != ei_lba) {
1734 printk(KERN_ERR "%s: REF check failed on sector %lu\n",
1735 __func__, (unsigned long)sector);
1736 dif_errors++;
1737 return 0x03;
1738 }
1739
1740 ei_lba++;
c6a44287
MP		 1741 }
1742
1743 resid = sectors * 8; /* Bytes of protection data to copy into sgl */
1744 sector = start_sec;
1745
1746 scsi_for_each_prot_sg(SCpnt, psgl, scsi_prot_sg_count(SCpnt), i) {
1747 int len = min(psgl->length, resid);
1748
1749 paddr = kmap_atomic(sg_page(psgl), KM_IRQ0) + psgl->offset;
1750 memcpy(paddr, dif_storep + dif_offset(sector), len);
1751
1752 sector += len >> 3;
1753 if (sector >= sdebug_store_sectors) {
1754 /* Force wrap */
1755 tmp_sec = sector;
1756 sector = do_div(tmp_sec, sdebug_store_sectors);
1757 }
1758 resid -= len;
1759 kunmap_atomic(paddr, KM_IRQ0);
1760 }
1761
1762 dix_reads++;
1763
1764 return 0;
1765}
1766
19789100 1767static int resp_read(struct scsi_cmnd *SCpnt, unsigned long long lba,
395cef03
MP		 1768 unsigned int num, struct sdebug_dev_info *devip,
1769 u32 ei_lba)
19789100
FT		 1770{
1771 unsigned long iflags;
1772 int ret;
1773
1774 ret = check_device_access_params(devip, lba, num);
1775 if (ret)
1776 return ret;
1777
1da177e4 1778 if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) &&
c65b1445
DG		 1779 (lba <= OPT_MEDIUM_ERR_ADDR) &&
1780 ((lba + num) > OPT_MEDIUM_ERR_ADDR)) {
1781 /* claim unrecoverable read error */
1da177e4
LT		 1782 mk_sense_buffer(devip, MEDIUM_ERROR, UNRECOVERED_READ_ERR,
1783 0);
c65b1445
DG		 1784 /* set info field and valid bit for fixed descriptor */
1785 if (0x70 == (devip->sense_buff[0] & 0x7f)) {
1786 devip->sense_buff[0] |= 0x80; /* Valid bit */
1787 ret = OPT_MEDIUM_ERR_ADDR;
1788 devip->sense_buff[3] = (ret >> 24) & 0xff;
1789 devip->sense_buff[4] = (ret >> 16) & 0xff;
1790 devip->sense_buff[5] = (ret >> 8) & 0xff;
1791 devip->sense_buff[6] = ret & 0xff;
1792 }
1da177e4
LT		 1793 return check_condition_result;
1794 }
c6a44287
MP		 1795
1796 /* DIX + T10 DIF */
1797 if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
395cef03 1798 int prot_ret = prot_verify_read(SCpnt, lba, num, ei_lba);
c6a44287
MP		 1799
1800 if (prot_ret) {
1801 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, prot_ret);
1802 return illegal_condition_result;
1803 }
1804 }
1805
1da177e4 1806 read_lock_irqsave(&atomic_rw, iflags);
19789100 1807 ret = do_device_access(SCpnt, devip, lba, num, 0);
1da177e4
LT		 1808 read_unlock_irqrestore(&atomic_rw, iflags);
1809 return ret;
1810}
1811
c6a44287
MP		 1812void dump_sector(unsigned char *buf, int len)
1813{
1814 int i, j;
1815
1816 printk(KERN_ERR ">>> Sector Dump <<<\n");
1817
1818 for (i = 0 ; i < len ; i += 16) {
1819 printk(KERN_ERR "%04d: ", i);
1820
1821 for (j = 0 ; j < 16 ; j++) {
1822 unsigned char c = buf[i+j];
1823 if (c >= 0x20 && c < 0x7e)
1824 printk(" %c ", buf[i+j]);
1825 else
1826 printk("%02x ", buf[i+j]);
1827 }
1828
1829 printk("\n");
1830 }
1831}
1832
1833static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
395cef03 1834 unsigned int sectors, u32 ei_lba)
c6a44287
MP		 1835{
1836 int i, j, ret;
1837 struct sd_dif_tuple *sdt;
1838 struct scatterlist *dsgl = scsi_sglist(SCpnt);
1839 struct scatterlist *psgl = scsi_prot_sglist(SCpnt);
1840 void *daddr, *paddr;
1841 sector_t tmp_sec = start_sec;
1842 sector_t sector;
1843 int ppage_offset;
1844 unsigned short csum;
1845
1846 sector = do_div(tmp_sec, sdebug_store_sectors);
1847
c6a44287
MP		 1848 BUG_ON(scsi_sg_count(SCpnt) == 0);
1849 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
1850
1851 paddr = kmap_atomic(sg_page(psgl), KM_IRQ1) + psgl->offset;
1852 ppage_offset = 0;
1853
1854 /* For each data page */
1855 scsi_for_each_sg(SCpnt, dsgl, scsi_sg_count(SCpnt), i) {
1856 daddr = kmap_atomic(sg_page(dsgl), KM_IRQ0) + dsgl->offset;
1857
1858 /* For each sector-sized chunk in data page */
1859 for (j = 0 ; j < dsgl->length ; j += scsi_debug_sector_size) {
1860
1861 /* If we're at the end of the current
1862 * protection page advance to the next one
1863 */
1864 if (ppage_offset >= psgl->length) {
1865 kunmap_atomic(paddr, KM_IRQ1);
1866 psgl = sg_next(psgl);
1867 BUG_ON(psgl == NULL);
1868 paddr = kmap_atomic(sg_page(psgl), KM_IRQ1)
1869 + psgl->offset;
1870 ppage_offset = 0;
1871 }
1872
1873 sdt = paddr + ppage_offset;
1874
1875 switch (scsi_debug_guard) {
1876 case 1:
1877 csum = ip_compute_csum(daddr,
1878 scsi_debug_sector_size);
1879 break;
1880 case 0:
1881 csum = cpu_to_be16(crc_t10dif(daddr,
1882 scsi_debug_sector_size));
1883 break;
1884 default:
1885 BUG();
1886 ret = 0;
1887 goto out;
1888 }
1889
1890 if (sdt->guard_tag != csum) {
1891 printk(KERN_ERR
1892 "%s: GUARD check failed on sector %lu " \
1893 "rcvd 0x%04x, calculated 0x%04x\n",
1894 __func__, (unsigned long)sector,
1895 be16_to_cpu(sdt->guard_tag),
1896 be16_to_cpu(csum));
1897 ret = 0x01;
1898 dump_sector(daddr, scsi_debug_sector_size);
1899 goto out;
1900 }
1901
395cef03 1902 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION &&
c6a44287
MP		 1903 be32_to_cpu(sdt->ref_tag)
1904 != (start_sec & 0xffffffff)) {
1905 printk(KERN_ERR
1906 "%s: REF check failed on sector %lu\n",
1907 __func__, (unsigned long)sector);
1908 ret = 0x03;
1909 dump_sector(daddr, scsi_debug_sector_size);
1910 goto out;
1911 }
1912
395cef03
MP		 1913 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
1914 be32_to_cpu(sdt->ref_tag) != ei_lba) {
1915 printk(KERN_ERR
1916 "%s: REF check failed on sector %lu\n",
1917 __func__, (unsigned long)sector);
1918 ret = 0x03;
1919 dump_sector(daddr, scsi_debug_sector_size);
1920 goto out;
1921 }
1922
c6a44287
MP		 1923 /* Would be great to copy this in bigger
1924 * chunks. However, for the sake of
1925 * correctness we need to verify each sector
1926 * before writing it to "stable" storage
1927 */
1928 memcpy(dif_storep + dif_offset(sector), sdt, 8);
1929
1930 sector++;
1931
1932 if (sector == sdebug_store_sectors)
1933 sector = 0; /* Force wrap */
1934
1935 start_sec++;
395cef03 1936 ei_lba++;
c6a44287
MP		 1937 daddr += scsi_debug_sector_size;
1938 ppage_offset += sizeof(struct sd_dif_tuple);
1939 }
1940
1941 kunmap_atomic(daddr, KM_IRQ0);
1942 }
1943
1944 kunmap_atomic(paddr, KM_IRQ1);
1945
1946 dix_writes++;
1947
1948 return 0;
1949
1950out:
1951 dif_errors++;
1952 kunmap_atomic(daddr, KM_IRQ0);
1953 kunmap_atomic(paddr, KM_IRQ1);
1954 return ret;
1955}
1956
44d92694
MP		 1957static unsigned int map_state(sector_t lba, unsigned int *num)
1958{
1959 unsigned int granularity, alignment, mapped;
1960 sector_t block, next, end;
1961
1962 granularity = scsi_debug_unmap_granularity;
1963 alignment = granularity - scsi_debug_unmap_alignment;
1964 block = lba + alignment;
1965 do_div(block, granularity);
1966
1967 mapped = test_bit(block, map_storep);
1968
1969 if (mapped)
1970 next = find_next_zero_bit(map_storep, map_size, block);
1971 else
1972 next = find_next_bit(map_storep, map_size, block);
1973
1974 end = next * granularity - scsi_debug_unmap_alignment;
1975 *num = end - lba;
1976
1977 return mapped;
1978}
1979
1980static void map_region(sector_t lba, unsigned int len)
1981{
1982 unsigned int granularity, alignment;
1983 sector_t end = lba + len;
1984
1985 granularity = scsi_debug_unmap_granularity;
1986 alignment = granularity - scsi_debug_unmap_alignment;
1987
1988 while (lba < end) {
1989 sector_t block, rem;
1990
1991 block = lba + alignment;
1992 rem = do_div(block, granularity);
1993
9ab98f57
FT		 1994 if (block < map_size)
1995 set_bit(block, map_storep);
44d92694
MP		 1996
1997 lba += granularity - rem;
1998 }
1999}
2000
2001static void unmap_region(sector_t lba, unsigned int len)
2002{
2003 unsigned int granularity, alignment;
2004 sector_t end = lba + len;
2005
2006 granularity = scsi_debug_unmap_granularity;
2007 alignment = granularity - scsi_debug_unmap_alignment;
2008
2009 while (lba < end) {
2010 sector_t block, rem;
2011
2012 block = lba + alignment;
2013 rem = do_div(block, granularity);
2014
9ab98f57
FT		 2015 if (rem == 0 && lba + granularity <= end &&
2016 block < map_size)
44d92694
MP		 2017 clear_bit(block, map_storep);
2018
2019 lba += granularity - rem;
2020 }
2021}
2022
19789100 2023static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba,
395cef03
MP		 2024 unsigned int num, struct sdebug_dev_info *devip,
2025 u32 ei_lba)
1da177e4
LT		 2026{
2027 unsigned long iflags;
19789100 2028 int ret;
1da177e4 2029
19789100
FT		 2030 ret = check_device_access_params(devip, lba, num);
2031 if (ret)
2032 return ret;
1da177e4 2033
c6a44287
MP		 2034 /* DIX + T10 DIF */
2035 if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
395cef03 2036 int prot_ret = prot_verify_write(SCpnt, lba, num, ei_lba);
c6a44287
MP		 2037
2038 if (prot_ret) {
2039 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, prot_ret);
2040 return illegal_condition_result;
2041 }
2042 }
2043
1da177e4 2044 write_lock_irqsave(&atomic_rw, iflags);
19789100 2045 ret = do_device_access(SCpnt, devip, lba, num, 1);
44d92694
MP		 2046 if (scsi_debug_unmap_granularity)
2047 map_region(lba, num);
1da177e4 2048 write_unlock_irqrestore(&atomic_rw, iflags);
19789100 2049 if (-1 == ret)
1da177e4 2050 return (DID_ERROR << 16);
597136ab 2051 else if ((ret < (num * scsi_debug_sector_size)) &&
1da177e4 2052 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
c65b1445 2053 printk(KERN_INFO "scsi_debug: write: cdb indicated=%u, "
597136ab 2054 " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret);
44d92694
MP		 2055
2056 return 0;
2057}
2058
2059static int resp_write_same(struct scsi_cmnd *scmd, unsigned long long lba,
2060 unsigned int num, struct sdebug_dev_info *devip,
2061 u32 ei_lba, unsigned int unmap)
2062{
2063 unsigned long iflags;
2064 unsigned long long i;
2065 int ret;
2066
2067 ret = check_device_access_params(devip, lba, num);
2068 if (ret)
2069 return ret;
2070
2071 write_lock_irqsave(&atomic_rw, iflags);
2072
2073 if (unmap && scsi_debug_unmap_granularity) {
2074 unmap_region(lba, num);
2075 goto out;
2076 }
2077
2078 /* Else fetch one logical block */
2079 ret = fetch_to_dev_buffer(scmd,
2080 fake_storep + (lba * scsi_debug_sector_size),
2081 scsi_debug_sector_size);
2082
2083 if (-1 == ret) {
2084 write_unlock_irqrestore(&atomic_rw, iflags);
2085 return (DID_ERROR << 16);
2086 } else if ((ret < (num * scsi_debug_sector_size)) &&
2087 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2088 printk(KERN_INFO "scsi_debug: write same: cdb indicated=%u, "
2089 " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret);
2090
2091 /* Copy first sector to remaining blocks */
2092 for (i = 1 ; i < num ; i++)
2093 memcpy(fake_storep + ((lba + i) * scsi_debug_sector_size),
2094 fake_storep + (lba * scsi_debug_sector_size),
2095 scsi_debug_sector_size);
2096
2097 if (scsi_debug_unmap_granularity)
2098 map_region(lba, num);
2099out:
2100 write_unlock_irqrestore(&atomic_rw, iflags);
2101
1da177e4
LT		 2102 return 0;
2103}
2104
44d92694
MP		 2105struct unmap_block_desc {
2106 __be64 lba;
2107 __be32 blocks;
2108 __be32 __reserved;
2109};
2110
2111static int resp_unmap(struct scsi_cmnd * scmd, struct sdebug_dev_info * devip)
2112{
2113 unsigned char *buf;
2114 struct unmap_block_desc *desc;
2115 unsigned int i, payload_len, descriptors;
2116 int ret;
2117
2118 ret = check_readiness(scmd, 1, devip);
2119 if (ret)
2120 return ret;
2121
2122 payload_len = get_unaligned_be16(&scmd->cmnd[7]);
2123 BUG_ON(scsi_bufflen(scmd) != payload_len);
2124
2125 descriptors = (payload_len - 8) / 16;
2126
2127 buf = kmalloc(scsi_bufflen(scmd), GFP_ATOMIC);
2128 if (!buf)
2129 return check_condition_result;
2130
2131 scsi_sg_copy_to_buffer(scmd, buf, scsi_bufflen(scmd));
2132
2133 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
2134 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
2135
2136 desc = (void *)&buf[8];
2137
2138 for (i = 0 ; i < descriptors ; i++) {
2139 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
2140 unsigned int num = get_unaligned_be32(&desc[i].blocks);
2141
2142 ret = check_device_access_params(devip, lba, num);
2143 if (ret)
2144 goto out;
2145
2146 unmap_region(lba, num);
2147 }
2148
2149 ret = 0;
2150
2151out:
2152 kfree(buf);
2153
2154 return ret;
2155}
2156
2157#define SDEBUG_GET_LBA_STATUS_LEN 32
2158
2159static int resp_get_lba_status(struct scsi_cmnd * scmd,
2160 struct sdebug_dev_info * devip)
2161{
2162 unsigned long long lba;
2163 unsigned int alloc_len, mapped, num;
2164 unsigned char arr[SDEBUG_GET_LBA_STATUS_LEN];
2165 int ret;
2166
2167 ret = check_readiness(scmd, 1, devip);
2168 if (ret)
2169 return ret;
2170
2171 lba = get_unaligned_be64(&scmd->cmnd[2]);
2172 alloc_len = get_unaligned_be32(&scmd->cmnd[10]);
2173
2174 if (alloc_len < 24)
2175 return 0;
2176
2177 ret = check_device_access_params(devip, lba, 1);
2178 if (ret)
2179 return ret;
2180
2181 mapped = map_state(lba, &num);
2182
2183 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
2184 put_unaligned_be32(16, &arr[0]); /* Parameter Data Length */
2185 put_unaligned_be64(lba, &arr[8]); /* LBA */
2186 put_unaligned_be32(num, &arr[16]); /* Number of blocks */
2187 arr[20] = !mapped; /* mapped = 0, unmapped = 1 */
2188
2189 return fill_from_dev_buffer(scmd, arr, SDEBUG_GET_LBA_STATUS_LEN);
2190}
2191
c65b1445 2192#define SDEBUG_RLUN_ARR_SZ 256
1da177e4
LT		 2193
2194static int resp_report_luns(struct scsi_cmnd * scp,
2195 struct sdebug_dev_info * devip)
2196{
2197 unsigned int alloc_len;
c65b1445 2198 int lun_cnt, i, upper, num, n, wlun, lun;
1da177e4
LT		 2199 unsigned char *cmd = (unsigned char *)scp->cmnd;
2200 int select_report = (int)cmd[2];
2201 struct scsi_lun *one_lun;
2202 unsigned char arr[SDEBUG_RLUN_ARR_SZ];
c65b1445 2203 unsigned char * max_addr;
1da177e4
LT		 2204
2205 alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
c65b1445 2206 if ((alloc_len < 4) || (select_report > 2)) {
1da177e4
LT		 2207 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
2208 0);
2209 return check_condition_result;
2210 }
2211 /* can produce response with up to 16k luns (lun 0 to lun 16383) */
2212 memset(arr, 0, SDEBUG_RLUN_ARR_SZ);
2213 lun_cnt = scsi_debug_max_luns;
c65b1445
DG		 2214 if (1 == select_report)
2215 lun_cnt = 0;
2216 else if (scsi_debug_no_lun_0 && (lun_cnt > 0))
2217 --lun_cnt;
2218 wlun = (select_report > 0) ? 1 : 0;
2219 num = lun_cnt + wlun;
2220 arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff;
2221 arr[3] = (sizeof(struct scsi_lun) * num) & 0xff;
2222 n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) /
2223 sizeof(struct scsi_lun)), num);
2224 if (n < num) {
2225 wlun = 0;
2226 lun_cnt = n;
2227 }
1da177e4 2228 one_lun = (struct scsi_lun *) &arr[8];
c65b1445
DG		 2229 max_addr = arr + SDEBUG_RLUN_ARR_SZ;
2230 for (i = 0, lun = (scsi_debug_no_lun_0 ? 1 : 0);
2231 ((i < lun_cnt) && ((unsigned char *)(one_lun + i) < max_addr));
2232 i++, lun++) {
2233 upper = (lun >> 8) & 0x3f;
1da177e4
LT		 2234 if (upper)
2235 one_lun[i].scsi_lun[0] =
2236 (upper | (SAM2_LUN_ADDRESS_METHOD << 6));
c65b1445
DG		 2237 one_lun[i].scsi_lun[1] = lun & 0xff;
2238 }
2239 if (wlun) {
2240 one_lun[i].scsi_lun[0] = (SAM2_WLUN_REPORT_LUNS >> 8) & 0xff;
2241 one_lun[i].scsi_lun[1] = SAM2_WLUN_REPORT_LUNS & 0xff;
2242 i++;
1da177e4 2243 }
c65b1445 2244 alloc_len = (unsigned char *)(one_lun + i) - arr;
1da177e4
LT		 2245 return fill_from_dev_buffer(scp, arr,
2246 min((int)alloc_len, SDEBUG_RLUN_ARR_SZ));
2247}
2248
c639d14e
FT		 2249static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
2250 unsigned int num, struct sdebug_dev_info *devip)
2251{
2252 int i, j, ret = -1;
2253 unsigned char *kaddr, *buf;
2254 unsigned int offset;
2255 struct scatterlist *sg;
2256 struct scsi_data_buffer *sdb = scsi_in(scp);
2257
2258 /* better not to use temporary buffer. */
2259 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
2260 if (!buf)
2261 return ret;
2262
21a61829 2263 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
c639d14e
FT		 2264
2265 offset = 0;
2266 for_each_sg(sdb->table.sgl, sg, sdb->table.nents, i) {
2267 kaddr = (unsigned char *)kmap_atomic(sg_page(sg), KM_USER0);
2268 if (!kaddr)
2269 goto out;
2270
2271 for (j = 0; j < sg->length; j++)
2272 *(kaddr + sg->offset + j) ^= *(buf + offset + j);
2273
2274 offset += sg->length;
2275 kunmap_atomic(kaddr, KM_USER0);
2276 }
2277 ret = 0;
2278out:
2279 kfree(buf);
2280
2281 return ret;
2282}
2283
1da177e4
LT		 2284/* When timer goes off this function is called. */
2285static void timer_intr_handler(unsigned long indx)
2286{
2287 struct sdebug_queued_cmd * sqcp;
2288 unsigned long iflags;
2289
78d4e5a0 2290 if (indx >= scsi_debug_max_queue) {
1da177e4
LT		 2291 printk(KERN_ERR "scsi_debug:timer_intr_handler: indx too "
2292 "large\n");
2293 return;
2294 }
2295 spin_lock_irqsave(&queued_arr_lock, iflags);
2296 sqcp = &queued_arr[(int)indx];
2297 if (! sqcp->in_use) {
2298 printk(KERN_ERR "scsi_debug:timer_intr_handler: Unexpected "
2299 "interrupt\n");
2300 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2301 return;
2302 }
2303 sqcp->in_use = 0;
2304 if (sqcp->done_funct) {
2305 sqcp->a_cmnd->result = sqcp->scsi_result;
2306 sqcp->done_funct(sqcp->a_cmnd); /* callback to mid level */
2307 }
2308 sqcp->done_funct = NULL;
2309 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2310}
2311
1da177e4 2312
8dea0d02
FT		 2313static struct sdebug_dev_info *
2314sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags)
5cb2fc06
FT		 2315{
2316 struct sdebug_dev_info *devip;
2317
2318 devip = kzalloc(sizeof(*devip), flags);
2319 if (devip) {
2320 devip->sdbg_host = sdbg_host;
2321 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
2322 }
2323 return devip;
2324}
2325
1da177e4
LT		 2326static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev)
2327{
2328 struct sdebug_host_info * sdbg_host;
2329 struct sdebug_dev_info * open_devip = NULL;
2330 struct sdebug_dev_info * devip =
2331 (struct sdebug_dev_info *)sdev->hostdata;
2332
2333 if (devip)
2334 return devip;
d1e4c9c5
FT		 2335 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
2336 if (!sdbg_host) {
1da177e4
LT		 2337 printk(KERN_ERR "Host info NULL\n");
2338 return NULL;
2339 }
2340 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
2341 if ((devip->used) && (devip->channel == sdev->channel) &&
2342 (devip->target == sdev->id) &&
2343 (devip->lun == sdev->lun))
2344 return devip;
2345 else {
2346 if ((!devip->used) && (!open_devip))
2347 open_devip = devip;
2348 }
2349 }
5cb2fc06
FT		 2350 if (!open_devip) { /* try and make a new one */
2351 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
2352 if (!open_devip) {
1da177e4 2353 printk(KERN_ERR "%s: out of memory at line %d\n",
cadbd4a5 2354 __func__, __LINE__);
1da177e4
LT		 2355 return NULL;
2356 }
1da177e4 2357 }
a75869d1
FT		 2358
2359 open_devip->channel = sdev->channel;
2360 open_devip->target = sdev->id;
2361 open_devip->lun = sdev->lun;
2362 open_devip->sdbg_host = sdbg_host;
2363 open_devip->reset = 1;
2364 open_devip->used = 1;
2365 memset(open_devip->sense_buff, 0, SDEBUG_SENSE_LEN);
2366 if (scsi_debug_dsense)
2367 open_devip->sense_buff[0] = 0x72;
2368 else {
2369 open_devip->sense_buff[0] = 0x70;
2370 open_devip->sense_buff[7] = 0xa;
2371 }
2372 if (sdev->lun == SAM2_WLUN_REPORT_LUNS)
2373 open_devip->wlun = SAM2_WLUN_REPORT_LUNS & 0xff;
2374
2375 return open_devip;
1da177e4
LT		 2376}
2377
8dea0d02 2378static int scsi_debug_slave_alloc(struct scsi_device *sdp)
1da177e4 2379{
8dea0d02
FT		 2380 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2381 printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %u>\n",
2382 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
75ad23bc 2383 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue);
8dea0d02
FT		 2384 return 0;
2385}
1da177e4 2386
8dea0d02
FT		 2387static int scsi_debug_slave_configure(struct scsi_device *sdp)
2388{
2389 struct sdebug_dev_info *devip;
a34c4e98 2390
8dea0d02
FT		 2391 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2392 printk(KERN_INFO "scsi_debug: slave_configure <%u %u %u %u>\n",
2393 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
2394 if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN)
2395 sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN;
2396 devip = devInfoReg(sdp);
2397 if (NULL == devip)
2398 return 1; /* no resources, will be marked offline */
2399 sdp->hostdata = devip;
2400 if (sdp->host->cmd_per_lun)
2401 scsi_adjust_queue_depth(sdp, SDEBUG_TAGGED_QUEUING,
2402 sdp->host->cmd_per_lun);
2403 blk_queue_max_segment_size(sdp->request_queue, 256 * 1024);
78d4e5a0
DG		 2404 if (scsi_debug_no_uld)
2405 sdp->no_uld_attach = 1;
8dea0d02
FT		 2406 return 0;
2407}
2408
2409static void scsi_debug_slave_destroy(struct scsi_device *sdp)
2410{
2411 struct sdebug_dev_info *devip =
2412 (struct sdebug_dev_info *)sdp->hostdata;
a34c4e98 2413
1da177e4 2414 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
8dea0d02
FT		 2415 printk(KERN_INFO "scsi_debug: slave_destroy <%u %u %u %u>\n",
2416 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
2417 if (devip) {
2418 /* make this slot avaliable for re-use */
2419 devip->used = 0;
2420 sdp->hostdata = NULL;
2421 }
2422}
2423
2424/* Returns 1 if found 'cmnd' and deleted its timer. else returns 0 */
2425static int stop_queued_cmnd(struct scsi_cmnd *cmnd)
2426{
2427 unsigned long iflags;
2428 int k;
2429 struct sdebug_queued_cmd *sqcp;
2430
2431 spin_lock_irqsave(&queued_arr_lock, iflags);
78d4e5a0 2432 for (k = 0; k < scsi_debug_max_queue; ++k) {
8dea0d02
FT		 2433 sqcp = &queued_arr[k];
2434 if (sqcp->in_use && (cmnd == sqcp->a_cmnd)) {
2435 del_timer_sync(&sqcp->cmnd_timer);
2436 sqcp->in_use = 0;
2437 sqcp->a_cmnd = NULL;
2438 break;
2439 }
2440 }
2441 spin_unlock_irqrestore(&queued_arr_lock, iflags);
78d4e5a0 2442 return (k < scsi_debug_max_queue) ? 1 : 0;
8dea0d02
FT		 2443}
2444
2445/* Deletes (stops) timers of all queued commands */
2446static void stop_all_queued(void)
2447{
2448 unsigned long iflags;
2449 int k;
2450 struct sdebug_queued_cmd *sqcp;
2451
2452 spin_lock_irqsave(&queued_arr_lock, iflags);
78d4e5a0 2453 for (k = 0; k < scsi_debug_max_queue; ++k) {
8dea0d02
FT		 2454 sqcp = &queued_arr[k];
2455 if (sqcp->in_use && sqcp->a_cmnd) {
2456 del_timer_sync(&sqcp->cmnd_timer);
2457 sqcp->in_use = 0;
2458 sqcp->a_cmnd = NULL;
2459 }
2460 }
2461 spin_unlock_irqrestore(&queued_arr_lock, iflags);
1da177e4
LT		 2462}
2463
2464static int scsi_debug_abort(struct scsi_cmnd * SCpnt)
2465{
2466 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2467 printk(KERN_INFO "scsi_debug: abort\n");
2468 ++num_aborts;
2469 stop_queued_cmnd(SCpnt);
2470 return SUCCESS;
2471}
2472
2473static int scsi_debug_biosparam(struct scsi_device *sdev,
2474 struct block_device * bdev, sector_t capacity, int *info)
2475{
2476 int res;
2477 unsigned char *buf;
2478
2479 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2480 printk(KERN_INFO "scsi_debug: biosparam\n");
2481 buf = scsi_bios_ptable(bdev);
2482 if (buf) {
2483 res = scsi_partsize(buf, capacity,
2484 &info[2], &info[0], &info[1]);
2485 kfree(buf);
2486 if (! res)
2487 return res;
2488 }
2489 info[0] = sdebug_heads;
2490 info[1] = sdebug_sectors_per;
2491 info[2] = sdebug_cylinders_per;
2492 return 0;
2493}
2494
2495static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
2496{
2497 struct sdebug_dev_info * devip;
2498
2499 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2500 printk(KERN_INFO "scsi_debug: device_reset\n");
2501 ++num_dev_resets;
2502 if (SCpnt) {
2503 devip = devInfoReg(SCpnt->device);
2504 if (devip)
2505 devip->reset = 1;
2506 }
2507 return SUCCESS;
2508}
2509
2510static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
2511{
2512 struct sdebug_host_info *sdbg_host;
2513 struct sdebug_dev_info * dev_info;
2514 struct scsi_device * sdp;
2515 struct Scsi_Host * hp;
2516
2517 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2518 printk(KERN_INFO "scsi_debug: bus_reset\n");
2519 ++num_bus_resets;
2520 if (SCpnt && ((sdp = SCpnt->device)) && ((hp = sdp->host))) {
d1e4c9c5 2521 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
1da177e4
LT		 2522 if (sdbg_host) {
2523 list_for_each_entry(dev_info,
2524 &sdbg_host->dev_info_list,
2525 dev_list)
2526 dev_info->reset = 1;
2527 }
2528 }
2529 return SUCCESS;
2530}
2531
2532static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
2533{
2534 struct sdebug_host_info * sdbg_host;
2535 struct sdebug_dev_info * dev_info;
2536
2537 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2538 printk(KERN_INFO "scsi_debug: host_reset\n");
2539 ++num_host_resets;
2540 spin_lock(&sdebug_host_list_lock);
2541 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
2542 list_for_each_entry(dev_info, &sdbg_host->dev_info_list,
2543 dev_list)
2544 dev_info->reset = 1;
2545 }
2546 spin_unlock(&sdebug_host_list_lock);
2547 stop_all_queued();
2548 return SUCCESS;
2549}
2550
1da177e4
LT		 2551/* Initializes timers in queued array */
2552static void __init init_all_queued(void)
2553{
2554 unsigned long iflags;
2555 int k;
2556 struct sdebug_queued_cmd * sqcp;
2557
2558 spin_lock_irqsave(&queued_arr_lock, iflags);
78d4e5a0 2559 for (k = 0; k < scsi_debug_max_queue; ++k) {
1da177e4
LT		 2560 sqcp = &queued_arr[k];
2561 init_timer(&sqcp->cmnd_timer);
2562 sqcp->in_use = 0;
2563 sqcp->a_cmnd = NULL;
2564 }
2565 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2566}
2567
f58b0efb 2568static void __init sdebug_build_parts(unsigned char *ramp,
5f2578e5 2569 unsigned long store_size)
1da177e4
LT		 2570{
2571 struct partition * pp;
2572 int starts[SDEBUG_MAX_PARTS + 2];
2573 int sectors_per_part, num_sectors, k;
2574 int heads_by_sects, start_sec, end_sec;
2575
2576 /* assume partition table already zeroed */
f58b0efb 2577 if ((scsi_debug_num_parts < 1) || (store_size < 1048576))
1da177e4
LT		 2578 return;
2579 if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) {
2580 scsi_debug_num_parts = SDEBUG_MAX_PARTS;
2581 printk(KERN_WARNING "scsi_debug:build_parts: reducing "
2582 "partitions to %d\n", SDEBUG_MAX_PARTS);
2583 }
c65b1445 2584 num_sectors = (int)sdebug_store_sectors;
1da177e4
LT		 2585 sectors_per_part = (num_sectors - sdebug_sectors_per)
2586 / scsi_debug_num_parts;
2587 heads_by_sects = sdebug_heads * sdebug_sectors_per;
2588 starts[0] = sdebug_sectors_per;
2589 for (k = 1; k < scsi_debug_num_parts; ++k)
2590 starts[k] = ((k * sectors_per_part) / heads_by_sects)
2591 * heads_by_sects;
2592 starts[scsi_debug_num_parts] = num_sectors;
2593 starts[scsi_debug_num_parts + 1] = 0;
2594
2595 ramp[510] = 0x55; /* magic partition markings */
2596 ramp[511] = 0xAA;
2597 pp = (struct partition *)(ramp + 0x1be);
2598 for (k = 0; starts[k + 1]; ++k, ++pp) {
2599 start_sec = starts[k];
2600 end_sec = starts[k + 1] - 1;
2601 pp->boot_ind = 0;
2602
2603 pp->cyl = start_sec / heads_by_sects;
2604 pp->head = (start_sec - (pp->cyl * heads_by_sects))
2605 / sdebug_sectors_per;
2606 pp->sector = (start_sec % sdebug_sectors_per) + 1;
2607
2608 pp->end_cyl = end_sec / heads_by_sects;
2609 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
2610 / sdebug_sectors_per;
2611 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
2612
2613 pp->start_sect = start_sec;
2614 pp->nr_sects = end_sec - start_sec + 1;
2615 pp->sys_ind = 0x83; /* plain Linux partition */
2616 }
2617}
2618
2619static int schedule_resp(struct scsi_cmnd * cmnd,
2620 struct sdebug_dev_info * devip,
2621 done_funct_t done, int scsi_result, int delta_jiff)
2622{
2623 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmnd) {
2624 if (scsi_result) {
2625 struct scsi_device * sdp = cmnd->device;
2626
c65b1445
DG		 2627 printk(KERN_INFO "scsi_debug: <%u %u %u %u> "
2628 "non-zero result=0x%x\n", sdp->host->host_no,
2629 sdp->channel, sdp->id, sdp->lun, scsi_result);
1da177e4
LT		 2630 }
2631 }
2632 if (cmnd && devip) {
2633 /* simulate autosense by this driver */
2634 if (SAM_STAT_CHECK_CONDITION == (scsi_result & 0xff))
2635 memcpy(cmnd->sense_buffer, devip->sense_buff,
2636 (SCSI_SENSE_BUFFERSIZE > SDEBUG_SENSE_LEN) ?
2637 SDEBUG_SENSE_LEN : SCSI_SENSE_BUFFERSIZE);
2638 }
2639 if (delta_jiff <= 0) {
2640 if (cmnd)
2641 cmnd->result = scsi_result;
2642 if (done)
2643 done(cmnd);
2644 return 0;
2645 } else {
2646 unsigned long iflags;
2647 int k;
2648 struct sdebug_queued_cmd * sqcp = NULL;
2649
2650 spin_lock_irqsave(&queued_arr_lock, iflags);
78d4e5a0 2651 for (k = 0; k < scsi_debug_max_queue; ++k) {
1da177e4
LT		 2652 sqcp = &queued_arr[k];
2653 if (! sqcp->in_use)
2654 break;
2655 }
78d4e5a0 2656 if (k >= scsi_debug_max_queue) {
1da177e4
LT		 2657 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2658 printk(KERN_WARNING "scsi_debug: can_queue exceeded\n");
2659 return 1; /* report busy to mid level */
2660 }
2661 sqcp->in_use = 1;
2662 sqcp->a_cmnd = cmnd;
2663 sqcp->scsi_result = scsi_result;
2664 sqcp->done_funct = done;
2665 sqcp->cmnd_timer.function = timer_intr_handler;
2666 sqcp->cmnd_timer.data = k;
2667 sqcp->cmnd_timer.expires = jiffies + delta_jiff;
2668 add_timer(&sqcp->cmnd_timer);
2669 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2670 if (cmnd)
2671 cmnd->result = 0;
2672 return 0;
2673 }
2674}
23183910
DG		 2675/* Note: The following macros create attribute files in the
2676 /sys/module/scsi_debug/parameters directory. Unfortunately this
2677 driver is unaware of a change and cannot trigger auxiliary actions
2678 as it can when the corresponding attribute in the
2679 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
2680 */
c65b1445
DG		 2681module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR);
2682module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR);
2683module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO);
2684module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR);
2685module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR);
23183910 2686module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR);
c65b1445 2687module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR);
78d4e5a0 2688module_param_named(max_queue, scsi_debug_max_queue, int, S_IRUGO | S_IWUSR);
c65b1445 2689module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR);
78d4e5a0 2690module_param_named(no_uld, scsi_debug_no_uld, int, S_IRUGO);
c65b1445
DG		 2691module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO);
2692module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR);
2693module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR);
2694module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR);
2695module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO);
2696module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR);
23183910
DG		 2697module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int,
2698 S_IRUGO | S_IWUSR);
597136ab 2699module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO);
c6a44287
MP		 2700module_param_named(dix, scsi_debug_dix, int, S_IRUGO);
2701module_param_named(dif, scsi_debug_dif, int, S_IRUGO);
2702module_param_named(guard, scsi_debug_guard, int, S_IRUGO);
2703module_param_named(ato, scsi_debug_ato, int, S_IRUGO);
ea61fca5 2704module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO);
e308b3d1 2705module_param_named(opt_blks, scsi_debug_opt_blks, int, S_IRUGO);
ea61fca5 2706module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO);
44d92694
MP		 2707module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO);
2708module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, int, S_IRUGO);
2709module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO);
2710module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO);
1da177e4
LT		 2711
2712MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
2713MODULE_DESCRIPTION("SCSI debug adapter driver");
2714MODULE_LICENSE("GPL");
2715MODULE_VERSION(SCSI_DEBUG_VERSION);
2716
2717MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
2718MODULE_PARM_DESC(delay, "# of jiffies to delay response(def=1)");
c65b1445
DG		 2719MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs(def=8)");
2720MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
beb87c33 2721MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
23183910 2722MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
c65b1445 2723MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
78d4e5a0 2724MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to 255(def))");
c65b1445 2725MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
78d4e5a0 2726MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
1da177e4 2727MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
c65b1445 2728MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
6f3cbf55 2729MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
1da177e4
LT		 2730MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
2731MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])");
c65b1445 2732MODULE_PARM_DESC(virtual_gb, "virtual gigabyte size (def=0 -> use dev_size_mb)");
23183910 2733MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
ea61fca5
MP		 2734MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
2735MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
e308b3d1 2736MODULE_PARM_DESC(opt_blks, "optimal transfer length in block (def=64)");
ea61fca5 2737MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
c6a44287
MP		 2738MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
2739MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
2740MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
2741MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
44d92694
MP		 2742MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0)");
2743MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=0)");
2744MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=0)");
2745MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
1da177e4
LT		 2746
2747static char sdebug_info[256];
2748
2749static const char * scsi_debug_info(struct Scsi_Host * shp)
2750{
2751 sprintf(sdebug_info, "scsi_debug, version %s [%s], "
2752 "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION,
2753 scsi_debug_version_date, scsi_debug_dev_size_mb,
2754 scsi_debug_opts);
2755 return sdebug_info;
2756}
2757
2758/* scsi_debug_proc_info
2759 * Used if the driver currently has no own support for /proc/scsi
2760 */
2761static int scsi_debug_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset,
2762 int length, int inout)
2763{
2764 int len, pos, begin;
2765 int orig_length;
2766
2767 orig_length = length;
2768
2769 if (inout == 1) {
2770 char arr[16];
2771 int minLen = length > 15 ? 15 : length;
2772
2773 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
2774 return -EACCES;
2775 memcpy(arr, buffer, minLen);
2776 arr[minLen] = '\0';
2777 if (1 != sscanf(arr, "%d", &pos))
2778 return -EINVAL;
2779 scsi_debug_opts = pos;
2780 if (scsi_debug_every_nth != 0)
2781 scsi_debug_cmnd_count = 0;
2782 return length;
2783 }
2784 begin = 0;
2785 pos = len = sprintf(buffer, "scsi_debug adapter driver, version "
2786 "%s [%s]\n"
2787 "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, "
2788 "every_nth=%d(curr:%d)\n"
2789 "delay=%d, max_luns=%d, scsi_level=%d\n"
2790 "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n"
2791 "number of aborts=%d, device_reset=%d, bus_resets=%d, "
c6a44287 2792 "host_resets=%d\ndix_reads=%d dix_writes=%d dif_errors=%d\n",
1da177e4
LT		 2793 SCSI_DEBUG_VERSION, scsi_debug_version_date, scsi_debug_num_tgts,
2794 scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth,
2795 scsi_debug_cmnd_count, scsi_debug_delay,
2796 scsi_debug_max_luns, scsi_debug_scsi_level,
597136ab
MP		 2797 scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads,
2798 sdebug_sectors_per, num_aborts, num_dev_resets, num_bus_resets,
c6a44287 2799 num_host_resets, dix_reads, dix_writes, dif_errors);
1da177e4
LT		 2800 if (pos < offset) {
2801 len = 0;
2802 begin = pos;
2803 }
2804 *start = buffer + (offset - begin); /* Start of wanted data */
2805 len -= (offset - begin);
2806 if (len > length)
2807 len = length;
2808 return len;
2809}
2810
2811static ssize_t sdebug_delay_show(struct device_driver * ddp, char * buf)
2812{
2813 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay);
2814}
2815
2816static ssize_t sdebug_delay_store(struct device_driver * ddp,
2817 const char * buf, size_t count)
2818{
2819 int delay;
2820 char work[20];
2821
2822 if (1 == sscanf(buf, "%10s", work)) {
2823 if ((1 == sscanf(work, "%d", &delay)) && (delay >= 0)) {
2824 scsi_debug_delay = delay;
2825 return count;
2826 }
2827 }
2828 return -EINVAL;
2829}
2830DRIVER_ATTR(delay, S_IRUGO | S_IWUSR, sdebug_delay_show,
2831 sdebug_delay_store);
2832
2833static ssize_t sdebug_opts_show(struct device_driver * ddp, char * buf)
2834{
2835 return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts);
2836}
2837
2838static ssize_t sdebug_opts_store(struct device_driver * ddp,
2839 const char * buf, size_t count)
2840{
2841 int opts;
2842 char work[20];
2843
2844 if (1 == sscanf(buf, "%10s", work)) {
2845 if (0 == strnicmp(work,"0x", 2)) {
2846 if (1 == sscanf(&work[2], "%x", &opts))
2847 goto opts_done;
2848 } else {
2849 if (1 == sscanf(work, "%d", &opts))
2850 goto opts_done;
2851 }
2852 }
2853 return -EINVAL;
2854opts_done:
2855 scsi_debug_opts = opts;
2856 scsi_debug_cmnd_count = 0;
2857 return count;
2858}
2859DRIVER_ATTR(opts, S_IRUGO | S_IWUSR, sdebug_opts_show,
2860 sdebug_opts_store);
2861
2862static ssize_t sdebug_ptype_show(struct device_driver * ddp, char * buf)
2863{
2864 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype);
2865}
2866static ssize_t sdebug_ptype_store(struct device_driver * ddp,
2867 const char * buf, size_t count)
2868{
2869 int n;
2870
2871 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2872 scsi_debug_ptype = n;
2873 return count;
2874 }
2875 return -EINVAL;
2876}
2877DRIVER_ATTR(ptype, S_IRUGO | S_IWUSR, sdebug_ptype_show, sdebug_ptype_store);
2878
2879static ssize_t sdebug_dsense_show(struct device_driver * ddp, char * buf)
2880{
2881 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense);
2882}
2883static ssize_t sdebug_dsense_store(struct device_driver * ddp,
2884 const char * buf, size_t count)
2885{
2886 int n;
2887
2888 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2889 scsi_debug_dsense = n;
2890 return count;
2891 }
2892 return -EINVAL;
2893}
2894DRIVER_ATTR(dsense, S_IRUGO | S_IWUSR, sdebug_dsense_show,
2895 sdebug_dsense_store);
2896
23183910
DG		 2897static ssize_t sdebug_fake_rw_show(struct device_driver * ddp, char * buf)
2898{
2899 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw);
2900}
2901static ssize_t sdebug_fake_rw_store(struct device_driver * ddp,
2902 const char * buf, size_t count)
2903{
2904 int n;
2905
2906 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2907 scsi_debug_fake_rw = n;
2908 return count;
2909 }
2910 return -EINVAL;
2911}
2912DRIVER_ATTR(fake_rw, S_IRUGO | S_IWUSR, sdebug_fake_rw_show,
2913 sdebug_fake_rw_store);
2914
c65b1445
DG		 2915static ssize_t sdebug_no_lun_0_show(struct device_driver * ddp, char * buf)
2916{
2917 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0);
2918}
2919static ssize_t sdebug_no_lun_0_store(struct device_driver * ddp,
2920 const char * buf, size_t count)
2921{
2922 int n;
2923
2924 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2925 scsi_debug_no_lun_0 = n;
2926 return count;
2927 }
2928 return -EINVAL;
2929}
2930DRIVER_ATTR(no_lun_0, S_IRUGO | S_IWUSR, sdebug_no_lun_0_show,
2931 sdebug_no_lun_0_store);
2932
1da177e4
LT		 2933static ssize_t sdebug_num_tgts_show(struct device_driver * ddp, char * buf)
2934{
2935 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts);
2936}
2937static ssize_t sdebug_num_tgts_store(struct device_driver * ddp,
2938 const char * buf, size_t count)
2939{
2940 int n;
2941
2942 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2943 scsi_debug_num_tgts = n;
2944 sdebug_max_tgts_luns();
2945 return count;
2946 }
2947 return -EINVAL;
2948}
2949DRIVER_ATTR(num_tgts, S_IRUGO | S_IWUSR, sdebug_num_tgts_show,
2950 sdebug_num_tgts_store);
2951
2952static ssize_t sdebug_dev_size_mb_show(struct device_driver * ddp, char * buf)
2953{
2954 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb);
2955}
2956DRIVER_ATTR(dev_size_mb, S_IRUGO, sdebug_dev_size_mb_show, NULL);
2957
2958static ssize_t sdebug_num_parts_show(struct device_driver * ddp, char * buf)
2959{
2960 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts);
2961}
2962DRIVER_ATTR(num_parts, S_IRUGO, sdebug_num_parts_show, NULL);
2963
2964static ssize_t sdebug_every_nth_show(struct device_driver * ddp, char * buf)
2965{
2966 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth);
2967}
2968static ssize_t sdebug_every_nth_store(struct device_driver * ddp,
2969 const char * buf, size_t count)
2970{
2971 int nth;
2972
2973 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
2974 scsi_debug_every_nth = nth;
2975 scsi_debug_cmnd_count = 0;
2976 return count;
2977 }
2978 return -EINVAL;
2979}
2980DRIVER_ATTR(every_nth, S_IRUGO | S_IWUSR, sdebug_every_nth_show,
2981 sdebug_every_nth_store);
2982
2983static ssize_t sdebug_max_luns_show(struct device_driver * ddp, char * buf)
2984{
2985 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns);
2986}
2987static ssize_t sdebug_max_luns_store(struct device_driver * ddp,
2988 const char * buf, size_t count)
2989{
2990 int n;
2991
2992 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2993 scsi_debug_max_luns = n;
2994 sdebug_max_tgts_luns();
2995 return count;
2996 }
2997 return -EINVAL;
2998}
2999DRIVER_ATTR(max_luns, S_IRUGO | S_IWUSR, sdebug_max_luns_show,
3000 sdebug_max_luns_store);
3001
78d4e5a0
DG		 3002static ssize_t sdebug_max_queue_show(struct device_driver * ddp, char * buf)
3003{
3004 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_queue);
3005}
3006static ssize_t sdebug_max_queue_store(struct device_driver * ddp,
3007 const char * buf, size_t count)
3008{
3009 int n;
3010
3011 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
3012 (n <= SCSI_DEBUG_CANQUEUE)) {
3013 scsi_debug_max_queue = n;
3014 return count;
3015 }
3016 return -EINVAL;
3017}
3018DRIVER_ATTR(max_queue, S_IRUGO | S_IWUSR, sdebug_max_queue_show,
3019 sdebug_max_queue_store);
3020
3021static ssize_t sdebug_no_uld_show(struct device_driver * ddp, char * buf)
3022{
3023 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_uld);
3024}
3025DRIVER_ATTR(no_uld, S_IRUGO, sdebug_no_uld_show, NULL);
3026
1da177e4
LT		 3027static ssize_t sdebug_scsi_level_show(struct device_driver * ddp, char * buf)
3028{
3029 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level);
3030}
3031DRIVER_ATTR(scsi_level, S_IRUGO, sdebug_scsi_level_show, NULL);
3032
c65b1445
DG		 3033static ssize_t sdebug_virtual_gb_show(struct device_driver * ddp, char * buf)
3034{
3035 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb);
3036}
3037static ssize_t sdebug_virtual_gb_store(struct device_driver * ddp,
3038 const char * buf, size_t count)
3039{
3040 int n;
3041
3042 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3043 scsi_debug_virtual_gb = n;
28898873
FT		 3044
3045 sdebug_capacity = get_sdebug_capacity();
3046
c65b1445
DG		 3047 return count;
3048 }
3049 return -EINVAL;
3050}
3051DRIVER_ATTR(virtual_gb, S_IRUGO | S_IWUSR, sdebug_virtual_gb_show,
3052 sdebug_virtual_gb_store);
3053
1da177e4
LT		 3054static ssize_t sdebug_add_host_show(struct device_driver * ddp, char * buf)
3055{
3056 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host);
3057}
3058
3059static ssize_t sdebug_add_host_store(struct device_driver * ddp,
3060 const char * buf, size_t count)
3061{
f3df41cf 3062 int delta_hosts;
1da177e4 3063
f3df41cf 3064 if (sscanf(buf, "%d", &delta_hosts) != 1)
1da177e4 3065 return -EINVAL;
1da177e4
LT		 3066 if (delta_hosts > 0) {
3067 do {
3068 sdebug_add_adapter();
3069 } while (--delta_hosts);
3070 } else if (delta_hosts < 0) {
3071 do {
3072 sdebug_remove_adapter();
3073 } while (++delta_hosts);
3074 }
3075 return count;
3076}
f3df41cf 3077DRIVER_ATTR(add_host, S_IRUGO | S_IWUSR, sdebug_add_host_show,
1da177e4
LT		 3078 sdebug_add_host_store);
3079
23183910
DG		 3080static ssize_t sdebug_vpd_use_hostno_show(struct device_driver * ddp,
3081 char * buf)
3082{
3083 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_vpd_use_hostno);
3084}
3085static ssize_t sdebug_vpd_use_hostno_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_vpd_use_hostno = n;
3092 return count;
3093 }
3094 return -EINVAL;
3095}
3096DRIVER_ATTR(vpd_use_hostno, S_IRUGO | S_IWUSR, sdebug_vpd_use_hostno_show,
3097 sdebug_vpd_use_hostno_store);
3098
597136ab
MP		 3099static ssize_t sdebug_sector_size_show(struct device_driver * ddp, char * buf)
3100{
3101 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size);
3102}
3103DRIVER_ATTR(sector_size, S_IRUGO, sdebug_sector_size_show, NULL);
3104
c6a44287
MP		 3105static ssize_t sdebug_dix_show(struct device_driver *ddp, char *buf)
3106{
3107 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix);
3108}
3109DRIVER_ATTR(dix, S_IRUGO, sdebug_dix_show, NULL);
3110
3111static ssize_t sdebug_dif_show(struct device_driver *ddp, char *buf)
3112{
3113 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif);
3114}
3115DRIVER_ATTR(dif, S_IRUGO, sdebug_dif_show, NULL);
3116
3117static ssize_t sdebug_guard_show(struct device_driver *ddp, char *buf)
3118{
3119 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_guard);
3120}
3121DRIVER_ATTR(guard, S_IRUGO, sdebug_guard_show, NULL);
3122
3123static ssize_t sdebug_ato_show(struct device_driver *ddp, char *buf)
3124{
3125 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato);
3126}
3127DRIVER_ATTR(ato, S_IRUGO, sdebug_ato_show, NULL);
3128
44d92694
MP		 3129static ssize_t sdebug_map_show(struct device_driver *ddp, char *buf)
3130{
3131 ssize_t count;
3132
3133 if (scsi_debug_unmap_granularity == 0)
3134 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
3135 sdebug_store_sectors);
3136
3137 count = bitmap_scnlistprintf(buf, PAGE_SIZE, map_storep, map_size);
3138
3139 buf[count++] = '\n';
3140 buf[count++] = 0;
3141
3142 return count;
3143}
3144DRIVER_ATTR(map, S_IRUGO, sdebug_map_show, NULL);
3145
c6a44287 3146
23183910
DG		 3147/* Note: The following function creates attribute files in the
3148 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
3149 files (over those found in the /sys/module/scsi_debug/parameters
3150 directory) is that auxiliary actions can be triggered when an attribute
3151 is changed. For example see: sdebug_add_host_store() above.
3152 */
6ecaff7f 3153static int do_create_driverfs_files(void)
1da177e4 3154{
6ecaff7f
RD		 3155 int ret;
3156
3157 ret = driver_create_file(&sdebug_driverfs_driver, &driver_attr_add_host);
3158 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_delay);
3159 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb);
3160 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dsense);
3161 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_every_nth);
23183910 3162 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_fake_rw);
6ecaff7f 3163 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_luns);
78d4e5a0 3164 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_queue);
23183910 3165 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_no_lun_0);
78d4e5a0 3166 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_no_uld);
6ecaff7f 3167 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_parts);
23183910 3168 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_tgts);
6ecaff7f
RD		 3169 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ptype);
3170 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_opts);
3171 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_scsi_level);
23183910
DG		 3172 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb);
3173 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno);
597136ab 3174 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_sector_size);
c6a44287
MP		 3175 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dix);
3176 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dif);
3177 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_guard);
3178 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ato);
44d92694 3179 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_map);
6ecaff7f 3180 return ret;
1da177e4
LT		 3181}
3182
3183static void do_remove_driverfs_files(void)
3184{
44d92694 3185 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_map);
c6a44287
MP		 3186 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ato);
3187 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_guard);
3188 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dif);
3189 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dix);
597136ab 3190 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_sector_size);
23183910
DG		 3191 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno);
3192 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb);
1da177e4
LT		 3193 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_scsi_level);
3194 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_opts);
3195 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ptype);
1da177e4 3196 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_tgts);
23183910 3197 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_parts);
78d4e5a0 3198 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_no_uld);
23183910 3199 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_no_lun_0);
78d4e5a0 3200 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_queue);
1da177e4 3201 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_luns);
23183910 3202 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_fake_rw);
1da177e4
LT		 3203 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_every_nth);
3204 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dsense);
3205 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb);
3206 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_delay);
3207 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_add_host);
3208}
3209
8dea0d02
FT		 3210static void pseudo_0_release(struct device *dev)
3211{
3212 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3213 printk(KERN_INFO "scsi_debug: pseudo_0_release() called\n");
3214}
3215
3216static struct device pseudo_primary = {
71610f55 3217 .init_name = "pseudo_0",
8dea0d02
FT		 3218 .release = pseudo_0_release,
3219};
3220
1da177e4
LT		 3221static int __init scsi_debug_init(void)
3222{
5f2578e5 3223 unsigned long sz;
1da177e4
LT		 3224 int host_to_add;
3225 int k;
6ecaff7f 3226 int ret;
1da177e4 3227
597136ab
MP		 3228 switch (scsi_debug_sector_size) {
3229 case 512:
3230 case 1024:
3231 case 2048:
3232 case 4096:
3233 break;
3234 default:
c6a44287 3235 printk(KERN_ERR "scsi_debug_init: invalid sector_size %d\n",
597136ab
MP		 3236 scsi_debug_sector_size);
3237 return -EINVAL;
3238 }
3239
c6a44287
MP		 3240 switch (scsi_debug_dif) {
3241
3242 case SD_DIF_TYPE0_PROTECTION:
3243 case SD_DIF_TYPE1_PROTECTION:
395cef03 3244 case SD_DIF_TYPE2_PROTECTION:
c6a44287
MP		 3245 case SD_DIF_TYPE3_PROTECTION:
3246 break;
3247
3248 default:
395cef03 3249 printk(KERN_ERR "scsi_debug_init: dif must be 0, 1, 2 or 3\n");
c6a44287
MP		 3250 return -EINVAL;
3251 }
3252
3253 if (scsi_debug_guard > 1) {
3254 printk(KERN_ERR "scsi_debug_init: guard must be 0 or 1\n");
3255 return -EINVAL;
3256 }
3257
3258 if (scsi_debug_ato > 1) {
3259 printk(KERN_ERR "scsi_debug_init: ato must be 0 or 1\n");
3260 return -EINVAL;
3261 }
3262
ea61fca5
MP		 3263 if (scsi_debug_physblk_exp > 15) {
3264 printk(KERN_ERR "scsi_debug_init: invalid physblk_exp %u\n",
3265 scsi_debug_physblk_exp);
3266 return -EINVAL;
3267 }
3268
3269 if (scsi_debug_lowest_aligned > 0x3fff) {
3270 printk(KERN_ERR "scsi_debug_init: lowest_aligned too big: %u\n",
3271 scsi_debug_lowest_aligned);
3272 return -EINVAL;
3273 }
3274
1da177e4
LT		 3275 if (scsi_debug_dev_size_mb < 1)
3276 scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
5f2578e5 3277 sz = (unsigned long)scsi_debug_dev_size_mb * 1048576;
597136ab 3278 sdebug_store_sectors = sz / scsi_debug_sector_size;
28898873 3279 sdebug_capacity = get_sdebug_capacity();
1da177e4
LT		 3280
3281 /* play around with geometry, don't waste too much on track 0 */
3282 sdebug_heads = 8;
3283 sdebug_sectors_per = 32;
3284 if (scsi_debug_dev_size_mb >= 16)
3285 sdebug_heads = 32;
3286 else if (scsi_debug_dev_size_mb >= 256)
3287 sdebug_heads = 64;
3288 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
3289 (sdebug_sectors_per * sdebug_heads);
3290 if (sdebug_cylinders_per >= 1024) {
3291 /* other LLDs do this; implies >= 1GB ram disk ... */
3292 sdebug_heads = 255;
3293 sdebug_sectors_per = 63;
3294 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
3295 (sdebug_sectors_per * sdebug_heads);
3296 }
3297
1da177e4
LT		 3298 fake_storep = vmalloc(sz);
3299 if (NULL == fake_storep) {
3300 printk(KERN_ERR "scsi_debug_init: out of memory, 1\n");
3301 return -ENOMEM;
3302 }
3303 memset(fake_storep, 0, sz);
3304 if (scsi_debug_num_parts > 0)
f58b0efb 3305 sdebug_build_parts(fake_storep, sz);
1da177e4 3306
c6a44287
MP		 3307 if (scsi_debug_dif) {
3308 int dif_size;
3309
3310 dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple);
3311 dif_storep = vmalloc(dif_size);
3312
3313 printk(KERN_ERR "scsi_debug_init: dif_storep %u bytes @ %p\n",
3314 dif_size, dif_storep);
3315
3316 if (dif_storep == NULL) {
3317 printk(KERN_ERR "scsi_debug_init: out of mem. (DIX)\n");
3318 ret = -ENOMEM;
3319 goto free_vm;
3320 }
3321
3322 memset(dif_storep, 0xff, dif_size);
3323 }
3324
44d92694
MP		 3325 if (scsi_debug_unmap_granularity) {
3326 unsigned int map_bytes;
3327
3328 if (scsi_debug_unmap_granularity < scsi_debug_unmap_alignment) {
3329 printk(KERN_ERR
3330 "%s: ERR: unmap_granularity < unmap_alignment\n",
3331 __func__);
3332 return -EINVAL;
3333 }
3334
3335 map_size = (sdebug_store_sectors / scsi_debug_unmap_granularity);
3336 map_bytes = map_size >> 3;
3337 map_storep = vmalloc(map_bytes);
3338
3339 printk(KERN_INFO "scsi_debug_init: %lu provisioning blocks\n",
3340 map_size);
3341
3342 if (map_storep == NULL) {
3343 printk(KERN_ERR "scsi_debug_init: out of mem. (MAP)\n");
3344 ret = -ENOMEM;
3345 goto free_vm;
3346 }
3347
3348 memset(map_storep, 0x0, map_bytes);
3349
3350 /* Map first 1KB for partition table */
3351 if (scsi_debug_num_parts)
3352 map_region(0, 2);
3353 }
3354
6ecaff7f
RD		 3355 ret = device_register(&pseudo_primary);
3356 if (ret < 0) {
3357 printk(KERN_WARNING "scsi_debug: device_register error: %d\n",
3358 ret);
3359 goto free_vm;
3360 }
3361 ret = bus_register(&pseudo_lld_bus);
3362 if (ret < 0) {
3363 printk(KERN_WARNING "scsi_debug: bus_register error: %d\n",
3364 ret);
3365 goto dev_unreg;
3366 }
3367 ret = driver_register(&sdebug_driverfs_driver);
3368 if (ret < 0) {
3369 printk(KERN_WARNING "scsi_debug: driver_register error: %d\n",
3370 ret);
3371 goto bus_unreg;
3372 }
3373 ret = do_create_driverfs_files();
3374 if (ret < 0) {
3375 printk(KERN_WARNING "scsi_debug: driver_create_file error: %d\n",
3376 ret);
3377 goto del_files;
3378 }
1da177e4 3379
6ecaff7f 3380 init_all_queued();
1da177e4 3381
1da177e4
LT		 3382 host_to_add = scsi_debug_add_host;
3383 scsi_debug_add_host = 0;
3384
3385 for (k = 0; k < host_to_add; k++) {
3386 if (sdebug_add_adapter()) {
3387 printk(KERN_ERR "scsi_debug_init: "
3388 "sdebug_add_adapter failed k=%d\n", k);
3389 break;
3390 }
3391 }
3392
3393 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
3394 printk(KERN_INFO "scsi_debug_init: built %d host(s)\n",
3395 scsi_debug_add_host);
3396 }
3397 return 0;
6ecaff7f
RD		 3398
3399del_files:
3400 do_remove_driverfs_files();
3401 driver_unregister(&sdebug_driverfs_driver);
3402bus_unreg:
3403 bus_unregister(&pseudo_lld_bus);
3404dev_unreg:
3405 device_unregister(&pseudo_primary);
3406free_vm:
44d92694
MP		 3407 if (map_storep)
3408 vfree(map_storep);
c6a44287
MP		 3409 if (dif_storep)
3410 vfree(dif_storep);
6ecaff7f
RD		 3411 vfree(fake_storep);
3412
3413 return ret;
1da177e4
LT		 3414}
3415
3416static void __exit scsi_debug_exit(void)
3417{
3418 int k = scsi_debug_add_host;
3419
3420 stop_all_queued();
3421 for (; k; k--)
3422 sdebug_remove_adapter();
3423 do_remove_driverfs_files();
3424 driver_unregister(&sdebug_driverfs_driver);
3425 bus_unregister(&pseudo_lld_bus);
3426 device_unregister(&pseudo_primary);
3427
c6a44287
MP		 3428 if (dif_storep)
3429 vfree(dif_storep);
3430
1da177e4
LT		 3431 vfree(fake_storep);
3432}
3433
3434device_initcall(scsi_debug_init);
3435module_exit(scsi_debug_exit);
3436
1da177e4
LT		 3437static void sdebug_release_adapter(struct device * dev)
3438{
3439 struct sdebug_host_info *sdbg_host;
3440
3441 sdbg_host = to_sdebug_host(dev);
3442 kfree(sdbg_host);
3443}
3444
3445static int sdebug_add_adapter(void)
3446{
3447 int k, devs_per_host;
3448 int error = 0;
3449 struct sdebug_host_info *sdbg_host;
8b40228f 3450 struct sdebug_dev_info *sdbg_devinfo, *tmp;
1da177e4 3451
c65b1445 3452 sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL);
1da177e4
LT		 3453 if (NULL == sdbg_host) {
3454 printk(KERN_ERR "%s: out of memory at line %d\n",
cadbd4a5 3455 __func__, __LINE__);
1da177e4
LT		 3456 return -ENOMEM;
3457 }
3458
1da177e4
LT		 3459 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
3460
3461 devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns;
3462 for (k = 0; k < devs_per_host; k++) {
5cb2fc06
FT		 3463 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
3464 if (!sdbg_devinfo) {
1da177e4 3465 printk(KERN_ERR "%s: out of memory at line %d\n",
cadbd4a5 3466 __func__, __LINE__);
1da177e4
LT		 3467 error = -ENOMEM;
3468 goto clean;
3469 }
1da177e4
LT		 3470 }
3471
3472 spin_lock(&sdebug_host_list_lock);
3473 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
3474 spin_unlock(&sdebug_host_list_lock);
3475
3476 sdbg_host->dev.bus = &pseudo_lld_bus;
3477 sdbg_host->dev.parent = &pseudo_primary;
3478 sdbg_host->dev.release = &sdebug_release_adapter;
71610f55 3479 dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host);
1da177e4
LT		 3480
3481 error = device_register(&sdbg_host->dev);
3482
3483 if (error)
3484 goto clean;
3485
3486 ++scsi_debug_add_host;
3487 return error;
3488
3489clean:
8b40228f
FT		 3490 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
3491 dev_list) {
1da177e4
LT		 3492 list_del(&sdbg_devinfo->dev_list);
3493 kfree(sdbg_devinfo);
3494 }
3495
3496 kfree(sdbg_host);
3497 return error;
3498}
3499
3500static void sdebug_remove_adapter(void)
3501{
3502 struct sdebug_host_info * sdbg_host = NULL;
3503
3504 spin_lock(&sdebug_host_list_lock);
3505 if (!list_empty(&sdebug_host_list)) {
3506 sdbg_host = list_entry(sdebug_host_list.prev,
3507 struct sdebug_host_info, host_list);
3508 list_del(&sdbg_host->host_list);
3509 }
3510 spin_unlock(&sdebug_host_list_lock);
3511
3512 if (!sdbg_host)
3513 return;
3514
3515 device_unregister(&sdbg_host->dev);
3516 --scsi_debug_add_host;
3517}
3518
639db475
FT		 3519static
3520int scsi_debug_queuecommand(struct scsi_cmnd *SCpnt, done_funct_t done)
3521{
3522 unsigned char *cmd = (unsigned char *) SCpnt->cmnd;
3523 int len, k;
3524 unsigned int num;
3525 unsigned long long lba;
395cef03 3526 u32 ei_lba;
639db475
FT		 3527 int errsts = 0;
3528 int target = SCpnt->device->id;
3529 struct sdebug_dev_info *devip = NULL;
3530 int inj_recovered = 0;
3531 int inj_transport = 0;
c6a44287
MP		 3532 int inj_dif = 0;
3533 int inj_dix = 0;
639db475 3534 int delay_override = 0;
44d92694 3535 int unmap = 0;
639db475
FT		 3536
3537 scsi_set_resid(SCpnt, 0);
3538 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmd) {
3539 printk(KERN_INFO "scsi_debug: cmd ");
3540 for (k = 0, len = SCpnt->cmd_len; k < len; ++k)
3541 printk("%02x ", (int)cmd[k]);
3542 printk("\n");
3543 }
3544
3545 if (target == SCpnt->device->host->hostt->this_id) {
3546 printk(KERN_INFO "scsi_debug: initiator's id used as "
3547 "target!\n");
3548 return schedule_resp(SCpnt, NULL, done,
3549 DID_NO_CONNECT << 16, 0);
3550 }
3551
3552 if ((SCpnt->device->lun >= scsi_debug_max_luns) &&
3553 (SCpnt->device->lun != SAM2_WLUN_REPORT_LUNS))
3554 return schedule_resp(SCpnt, NULL, done,
3555 DID_NO_CONNECT << 16, 0);
3556 devip = devInfoReg(SCpnt->device);
3557 if (NULL == devip)
3558 return schedule_resp(SCpnt, NULL, done,
3559 DID_NO_CONNECT << 16, 0);
3560
3561 if ((scsi_debug_every_nth != 0) &&
3562 (++scsi_debug_cmnd_count >= abs(scsi_debug_every_nth))) {
3563 scsi_debug_cmnd_count = 0;
3564 if (scsi_debug_every_nth < -1)
3565 scsi_debug_every_nth = -1;
3566 if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts)
3567 return 0; /* ignore command causing timeout */
3568 else if (SCSI_DEBUG_OPT_RECOVERED_ERR & scsi_debug_opts)
3569 inj_recovered = 1; /* to reads and writes below */
3570 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & scsi_debug_opts)
3571 inj_transport = 1; /* to reads and writes below */
c6a44287
MP		 3572 else if (SCSI_DEBUG_OPT_DIF_ERR & scsi_debug_opts)
3573 inj_dif = 1; /* to reads and writes below */
3574 else if (SCSI_DEBUG_OPT_DIX_ERR & scsi_debug_opts)
3575 inj_dix = 1; /* to reads and writes below */
639db475
FT		 3576 }
3577
3578 if (devip->wlun) {
3579 switch (*cmd) {
3580 case INQUIRY:
3581 case REQUEST_SENSE:
3582 case TEST_UNIT_READY:
3583 case REPORT_LUNS:
3584 break; /* only allowable wlun commands */
3585 default:
3586 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3587 printk(KERN_INFO "scsi_debug: Opcode: 0x%x "
3588 "not supported for wlun\n", *cmd);
3589 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3590 INVALID_OPCODE, 0);
3591 errsts = check_condition_result;
3592 return schedule_resp(SCpnt, devip, done, errsts,
3593 0);
3594 }
3595 }
3596
3597 switch (*cmd) {
3598 case INQUIRY: /* mandatory, ignore unit attention */
3599 delay_override = 1;
3600 errsts = resp_inquiry(SCpnt, target, devip);
3601 break;
3602 case REQUEST_SENSE: /* mandatory, ignore unit attention */
3603 delay_override = 1;
3604 errsts = resp_requests(SCpnt, devip);
3605 break;
3606 case REZERO_UNIT: /* actually this is REWIND for SSC */
3607 case START_STOP:
3608 errsts = resp_start_stop(SCpnt, devip);
3609 break;
3610 case ALLOW_MEDIUM_REMOVAL:
3611 errsts = check_readiness(SCpnt, 1, devip);
3612 if (errsts)
3613 break;
3614 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3615 printk(KERN_INFO "scsi_debug: Medium removal %s\n",
3616 cmd[4] ? "inhibited" : "enabled");
3617 break;
3618 case SEND_DIAGNOSTIC: /* mandatory */
3619 errsts = check_readiness(SCpnt, 1, devip);
3620 break;
3621 case TEST_UNIT_READY: /* mandatory */
3622 delay_override = 1;
3623 errsts = check_readiness(SCpnt, 0, devip);
3624 break;
3625 case RESERVE:
3626 errsts = check_readiness(SCpnt, 1, devip);
3627 break;
3628 case RESERVE_10:
3629 errsts = check_readiness(SCpnt, 1, devip);
3630 break;
3631 case RELEASE:
3632 errsts = check_readiness(SCpnt, 1, devip);
3633 break;
3634 case RELEASE_10:
3635 errsts = check_readiness(SCpnt, 1, devip);
3636 break;
3637 case READ_CAPACITY:
3638 errsts = resp_readcap(SCpnt, devip);
3639 break;
3640 case SERVICE_ACTION_IN:
44d92694
MP		 3641 if (cmd[1] == SAI_READ_CAPACITY_16)
3642 errsts = resp_readcap16(SCpnt, devip);
3643 else if (cmd[1] == SAI_GET_LBA_STATUS) {
3644
3645 if (scsi_debug_unmap_max_desc == 0) {
3646 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3647 INVALID_COMMAND_OPCODE, 0);
3648 errsts = check_condition_result;
3649 } else
3650 errsts = resp_get_lba_status(SCpnt, devip);
3651 } else {
639db475
FT		 3652 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3653 INVALID_OPCODE, 0);
3654 errsts = check_condition_result;
639db475 3655 }
639db475
FT		 3656 break;
3657 case MAINTENANCE_IN:
3658 if (MI_REPORT_TARGET_PGS != cmd[1]) {
3659 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3660 INVALID_OPCODE, 0);
3661 errsts = check_condition_result;
3662 break;
3663 }
3664 errsts = resp_report_tgtpgs(SCpnt, devip);
3665 break;
3666 case READ_16:
3667 case READ_12:
3668 case READ_10:
395cef03
MP		 3669 /* READ{10,12,16} and DIF Type 2 are natural enemies */
3670 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
3671 cmd[1] & 0xe0) {
3672 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3673 INVALID_COMMAND_OPCODE, 0);
3674 errsts = check_condition_result;
3675 break;
3676 }
3677
3678 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
3679 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
3680 (cmd[1] & 0xe0) == 0)
3681 printk(KERN_ERR "Unprotected RD/WR to DIF device\n");
3682
3683 /* fall through */
639db475 3684 case READ_6:
395cef03 3685read:
639db475
FT		 3686 errsts = check_readiness(SCpnt, 0, devip);
3687 if (errsts)
3688 break;
3689 if (scsi_debug_fake_rw)
3690 break;
395cef03
MP		 3691 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3692 errsts = resp_read(SCpnt, lba, num, devip, ei_lba);
639db475
FT		 3693 if (inj_recovered && (0 == errsts)) {
3694 mk_sense_buffer(devip, RECOVERED_ERROR,
3695 THRESHOLD_EXCEEDED, 0);
3696 errsts = check_condition_result;
3697 } else if (inj_transport && (0 == errsts)) {
3698 mk_sense_buffer(devip, ABORTED_COMMAND,
3699 TRANSPORT_PROBLEM, ACK_NAK_TO);
3700 errsts = check_condition_result;
c6a44287
MP		 3701 } else if (inj_dif && (0 == errsts)) {
3702 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1);
3703 errsts = illegal_condition_result;
3704 } else if (inj_dix && (0 == errsts)) {
3705 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1);
3706 errsts = illegal_condition_result;
639db475
FT		 3707 }
3708 break;
3709 case REPORT_LUNS: /* mandatory, ignore unit attention */
3710 delay_override = 1;
3711 errsts = resp_report_luns(SCpnt, devip);
3712 break;
3713 case VERIFY: /* 10 byte SBC-2 command */
3714 errsts = check_readiness(SCpnt, 0, devip);
3715 break;
3716 case WRITE_16:
3717 case WRITE_12:
3718 case WRITE_10:
395cef03
MP		 3719 /* WRITE{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 */
639db475 3734 case WRITE_6:
395cef03 3735write:
639db475
FT		 3736 errsts = check_readiness(SCpnt, 0, devip);
3737 if (errsts)
3738 break;
3739 if (scsi_debug_fake_rw)
3740 break;
395cef03
MP		 3741 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3742 errsts = resp_write(SCpnt, lba, num, devip, ei_lba);
639db475
FT		 3743 if (inj_recovered && (0 == errsts)) {
3744 mk_sense_buffer(devip, RECOVERED_ERROR,
3745 THRESHOLD_EXCEEDED, 0);
3746 errsts = check_condition_result;
c6a44287
MP		 3747 } else if (inj_dif && (0 == errsts)) {
3748 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1);
3749 errsts = illegal_condition_result;
3750 } else if (inj_dix && (0 == errsts)) {
3751 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1);
3752 errsts = illegal_condition_result;
639db475
FT		 3753 }
3754 break;
44d92694
MP		 3755 case WRITE_SAME_16:
3756 if (cmd[1] & 0x8)
3757 unmap = 1;
3758 /* fall through */
3759 case WRITE_SAME:
3760 errsts = check_readiness(SCpnt, 0, devip);
3761 if (errsts)
3762 break;
3763 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3764 errsts = resp_write_same(SCpnt, lba, num, devip, ei_lba, unmap);
3765 break;
3766 case UNMAP:
3767 errsts = check_readiness(SCpnt, 0, devip);
3768 if (errsts)
3769 break;
3770
3771 if (scsi_debug_unmap_max_desc == 0) {
3772 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3773 INVALID_COMMAND_OPCODE, 0);
3774 errsts = check_condition_result;
3775 } else
3776 errsts = resp_unmap(SCpnt, devip);
3777 break;
639db475
FT		 3778 case MODE_SENSE:
3779 case MODE_SENSE_10:
3780 errsts = resp_mode_sense(SCpnt, target, devip);
3781 break;
3782 case MODE_SELECT:
3783 errsts = resp_mode_select(SCpnt, 1, devip);
3784 break;
3785 case MODE_SELECT_10:
3786 errsts = resp_mode_select(SCpnt, 0, devip);
3787 break;
3788 case LOG_SENSE:
3789 errsts = resp_log_sense(SCpnt, devip);
3790 break;
3791 case SYNCHRONIZE_CACHE:
3792 delay_override = 1;
3793 errsts = check_readiness(SCpnt, 0, devip);
3794 break;
3795 case WRITE_BUFFER:
3796 errsts = check_readiness(SCpnt, 1, devip);
3797 break;
3798 case XDWRITEREAD_10:
3799 if (!scsi_bidi_cmnd(SCpnt)) {
3800 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3801 INVALID_FIELD_IN_CDB, 0);
3802 errsts = check_condition_result;
3803 break;
3804 }
3805
3806 errsts = check_readiness(SCpnt, 0, devip);
3807 if (errsts)
3808 break;
3809 if (scsi_debug_fake_rw)
3810 break;
395cef03
MP		 3811 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3812 errsts = resp_read(SCpnt, lba, num, devip, ei_lba);
639db475
FT		 3813 if (errsts)
3814 break;
395cef03 3815 errsts = resp_write(SCpnt, lba, num, devip, ei_lba);
639db475
FT		 3816 if (errsts)
3817 break;
3818 errsts = resp_xdwriteread(SCpnt, lba, num, devip);
3819 break;
395cef03
MP		 3820 case VARIABLE_LENGTH_CMD:
3821 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION) {
3822
3823 if ((cmd[10] & 0xe0) == 0)
3824 printk(KERN_ERR
3825 "Unprotected RD/WR to DIF device\n");
3826
3827 if (cmd[9] == READ_32) {
3828 BUG_ON(SCpnt->cmd_len < 32);
3829 goto read;
3830 }
3831
3832 if (cmd[9] == WRITE_32) {
3833 BUG_ON(SCpnt->cmd_len < 32);
3834 goto write;
3835 }
3836 }
3837
3838 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3839 INVALID_FIELD_IN_CDB, 0);
3840 errsts = check_condition_result;
3841 break;
3842
639db475
FT		 3843 default:
3844 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3845 printk(KERN_INFO "scsi_debug: Opcode: 0x%x not "
3846 "supported\n", *cmd);
3847 errsts = check_readiness(SCpnt, 1, devip);
3848 if (errsts)
3849 break; /* Unit attention takes precedence */
3850 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
3851 errsts = check_condition_result;
3852 break;
3853 }
3854 return schedule_resp(SCpnt, devip, done, errsts,
3855 (delay_override ? 0 : scsi_debug_delay));
3856}
3857
9e603ca0
FT		 3858static struct scsi_host_template sdebug_driver_template = {
3859 .proc_info = scsi_debug_proc_info,
3860 .proc_name = sdebug_proc_name,
3861 .name = "SCSI DEBUG",
3862 .info = scsi_debug_info,
3863 .slave_alloc = scsi_debug_slave_alloc,
3864 .slave_configure = scsi_debug_slave_configure,
3865 .slave_destroy = scsi_debug_slave_destroy,
3866 .ioctl = scsi_debug_ioctl,
3867 .queuecommand = scsi_debug_queuecommand,
3868 .eh_abort_handler = scsi_debug_abort,
3869 .eh_bus_reset_handler = scsi_debug_bus_reset,
3870 .eh_device_reset_handler = scsi_debug_device_reset,
3871 .eh_host_reset_handler = scsi_debug_host_reset,
3872 .bios_param = scsi_debug_biosparam,
3873 .can_queue = SCSI_DEBUG_CANQUEUE,
3874 .this_id = 7,
3875 .sg_tablesize = 256,
3876 .cmd_per_lun = 16,
3877 .max_sectors = 0xffff,
3878 .use_clustering = DISABLE_CLUSTERING,
3879 .module = THIS_MODULE,
3880};
3881
1da177e4
LT		 3882static int sdebug_driver_probe(struct device * dev)
3883{
3884 int error = 0;
3885 struct sdebug_host_info *sdbg_host;
3886 struct Scsi_Host *hpnt;
c6a44287 3887 int host_prot;
1da177e4
LT		 3888
3889 sdbg_host = to_sdebug_host(dev);
3890
78d4e5a0
DG		 3891 sdebug_driver_template.can_queue = scsi_debug_max_queue;
3892 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
3893 if (NULL == hpnt) {
3894 printk(KERN_ERR "%s: scsi_register failed\n", __func__);
3895 error = -ENODEV;
1da177e4 3896 return error;
78d4e5a0 3897 }
1da177e4
LT		 3898
3899 sdbg_host->shost = hpnt;
3900 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
3901 if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id))
3902 hpnt->max_id = scsi_debug_num_tgts + 1;
3903 else
3904 hpnt->max_id = scsi_debug_num_tgts;
c65b1445 3905 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; /* = scsi_debug_max_luns; */
1da177e4 3906
c6a44287
MP		 3907 host_prot = 0;
3908
3909 switch (scsi_debug_dif) {
3910
3911 case SD_DIF_TYPE1_PROTECTION:
3912 host_prot = SHOST_DIF_TYPE1_PROTECTION;
3913 if (scsi_debug_dix)
3914 host_prot |= SHOST_DIX_TYPE1_PROTECTION;
3915 break;
3916
3917 case SD_DIF_TYPE2_PROTECTION:
3918 host_prot = SHOST_DIF_TYPE2_PROTECTION;
3919 if (scsi_debug_dix)
3920 host_prot |= SHOST_DIX_TYPE2_PROTECTION;
3921 break;
3922
3923 case SD_DIF_TYPE3_PROTECTION:
3924 host_prot = SHOST_DIF_TYPE3_PROTECTION;
3925 if (scsi_debug_dix)
3926 host_prot |= SHOST_DIX_TYPE3_PROTECTION;
3927 break;
3928
3929 default:
3930 if (scsi_debug_dix)
3931 host_prot |= SHOST_DIX_TYPE0_PROTECTION;
3932 break;
3933 }
3934
3935 scsi_host_set_prot(hpnt, host_prot);
3936
3937 printk(KERN_INFO "scsi_debug: host protection%s%s%s%s%s%s%s\n",
3938 (host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
3939 (host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
3940 (host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
3941 (host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
3942 (host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
3943 (host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
3944 (host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
3945
3946 if (scsi_debug_guard == 1)
3947 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
3948 else
3949 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
3950
1da177e4
LT		 3951 error = scsi_add_host(hpnt, &sdbg_host->dev);
3952 if (error) {
cadbd4a5 3953 printk(KERN_ERR "%s: scsi_add_host failed\n", __func__);
1da177e4
LT		 3954 error = -ENODEV;
3955 scsi_host_put(hpnt);
3956 } else
3957 scsi_scan_host(hpnt);
3958
3959
3960 return error;
3961}
3962
3963static int sdebug_driver_remove(struct device * dev)
3964{
1da177e4 3965 struct sdebug_host_info *sdbg_host;
8b40228f 3966 struct sdebug_dev_info *sdbg_devinfo, *tmp;
1da177e4
LT		 3967
3968 sdbg_host = to_sdebug_host(dev);
3969
3970 if (!sdbg_host) {
3971 printk(KERN_ERR "%s: Unable to locate host info\n",
cadbd4a5 3972 __func__);
1da177e4
LT		 3973 return -ENODEV;
3974 }
3975
3976 scsi_remove_host(sdbg_host->shost);
3977
8b40228f
FT		 3978 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
3979 dev_list) {
1da177e4
LT		 3980 list_del(&sdbg_devinfo->dev_list);
3981 kfree(sdbg_devinfo);
3982 }
3983
3984 scsi_host_put(sdbg_host->shost);
3985 return 0;
3986}
3987
8dea0d02
FT		 3988static int pseudo_lld_bus_match(struct device *dev,
3989 struct device_driver *dev_driver)
1da177e4 3990{
8dea0d02 3991 return 1;
1da177e4 3992}
8dea0d02
FT		 3993
3994static struct bus_type pseudo_lld_bus = {
3995 .name = "pseudo",
3996 .match = pseudo_lld_bus_match,
3997 .probe = sdebug_driver_probe,
3998 .remove = sdebug_driver_remove,
3999};
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