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random: allow fractional bits to be tracked
[linux-2.6-block.git] / drivers / scsi / scsi_debug.c
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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 */
5b94e232 92#define DEF_ATO 1
1da177e4
LT		 93#define DEF_DELAY 1
94#define DEF_DEV_SIZE_MB 8
5b94e232
MP		 95#define DEF_DIF 0
96#define DEF_DIX 0
1da177e4 97#define DEF_D_SENSE 0
5b94e232 98#define DEF_EVERY_NTH 0
23183910 99#define DEF_FAKE_RW 0
c6a44287 100#define DEF_GUARD 0
5b94e232
MP		 101#define DEF_LBPU 0
102#define DEF_LBPWS 0
103#define DEF_LBPWS10 0
be1dd78d 104#define DEF_LBPRZ 1
ea61fca5 105#define DEF_LOWEST_ALIGNED 0
5b94e232
MP		 106#define DEF_NO_LUN_0 0
107#define DEF_NUM_PARTS 0
108#define DEF_OPTS 0
e308b3d1 109#define DEF_OPT_BLKS 64
5b94e232
MP		 110#define DEF_PHYSBLK_EXP 0
111#define DEF_PTYPE 0
d986788b 112#define DEF_REMOVABLE false
5b94e232
MP		 113#define DEF_SCSI_LEVEL 5 /* INQUIRY, byte2 [5->SPC-3] */
114#define DEF_SECTOR_SIZE 512
115#define DEF_UNMAP_ALIGNMENT 0
116#define DEF_UNMAP_GRANULARITY 1
6014759c
MP		 117#define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
118#define DEF_UNMAP_MAX_DESC 256
5b94e232
MP		 119#define DEF_VIRTUAL_GB 0
120#define DEF_VPD_USE_HOSTNO 1
121#define DEF_WRITESAME_LENGTH 0xFFFF
1da177e4
LT		 122
123/* bit mask values for scsi_debug_opts */
124#define SCSI_DEBUG_OPT_NOISE 1
125#define SCSI_DEBUG_OPT_MEDIUM_ERR 2
126#define SCSI_DEBUG_OPT_TIMEOUT 4
127#define SCSI_DEBUG_OPT_RECOVERED_ERR 8
6f3cbf55 128#define SCSI_DEBUG_OPT_TRANSPORT_ERR 16
c6a44287
MP		 129#define SCSI_DEBUG_OPT_DIF_ERR 32
130#define SCSI_DEBUG_OPT_DIX_ERR 64
18a4d0a2 131#define SCSI_DEBUG_OPT_MAC_TIMEOUT 128
1da177e4
LT		 132/* When "every_nth" > 0 then modulo "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 *
139 * When "every_nth" < 0 then after "- every_nth" commands:
140 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
141 * - a RECOVERED_ERROR is simulated on successful read and write
142 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
6f3cbf55
DG		 143 * - a TRANSPORT_ERROR is simulated on successful read and write
144 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
1da177e4
LT		 145 * This will continue until some other action occurs (e.g. the user
146 * writing a new value (other than -1 or 1) to every_nth via sysfs).
147 */
148
149/* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
150 * sector on read commands: */
151#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
32f7ef73 152#define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
1da177e4
LT		 153
154/* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
155 * or "peripheral device" addressing (value 0) */
156#define SAM2_LUN_ADDRESS_METHOD 0
c65b1445 157#define SAM2_WLUN_REPORT_LUNS 0xc101
1da177e4 158
78d4e5a0
DG		 159/* Can queue up to this number of commands. Typically commands that
160 * that have a non-zero delay are queued. */
161#define SCSI_DEBUG_CANQUEUE 255
162
1da177e4 163static int scsi_debug_add_host = DEF_NUM_HOST;
5b94e232 164static int scsi_debug_ato = DEF_ATO;
1da177e4
LT		 165static int scsi_debug_delay = DEF_DELAY;
166static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB;
5b94e232
MP		 167static int scsi_debug_dif = DEF_DIF;
168static int scsi_debug_dix = DEF_DIX;
169static int scsi_debug_dsense = DEF_D_SENSE;
1da177e4 170static int scsi_debug_every_nth = DEF_EVERY_NTH;
5b94e232
MP		 171static int scsi_debug_fake_rw = DEF_FAKE_RW;
172static int scsi_debug_guard = DEF_GUARD;
173static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED;
1da177e4 174static int scsi_debug_max_luns = DEF_MAX_LUNS;
78d4e5a0 175static int scsi_debug_max_queue = SCSI_DEBUG_CANQUEUE;
5b94e232 176static int scsi_debug_no_lun_0 = DEF_NO_LUN_0;
78d4e5a0 177static int scsi_debug_no_uld = 0;
5b94e232 178static int scsi_debug_num_parts = DEF_NUM_PARTS;
1da177e4 179static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */
5b94e232 180static int scsi_debug_opt_blks = DEF_OPT_BLKS;
1da177e4 181static int scsi_debug_opts = DEF_OPTS;
5b94e232 182static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP;
1da177e4 183static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */
5b94e232
MP		 184static int scsi_debug_scsi_level = DEF_SCSI_LEVEL;
185static int scsi_debug_sector_size = DEF_SECTOR_SIZE;
c65b1445 186static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB;
23183910 187static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
5b94e232
MP		 188static unsigned int scsi_debug_lbpu = DEF_LBPU;
189static unsigned int scsi_debug_lbpws = DEF_LBPWS;
190static unsigned int scsi_debug_lbpws10 = DEF_LBPWS10;
be1dd78d 191static unsigned int scsi_debug_lbprz = DEF_LBPRZ;
6014759c 192static unsigned int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
5b94e232
MP		 193static unsigned int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY;
194static unsigned int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
195static unsigned int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
196static unsigned int scsi_debug_write_same_length = DEF_WRITESAME_LENGTH;
d986788b 197static bool scsi_debug_removable = DEF_REMOVABLE;
1da177e4
LT		 198
199static int scsi_debug_cmnd_count = 0;
200
201#define DEV_READONLY(TGT) (0)
1da177e4 202
c65b1445 203static unsigned int sdebug_store_sectors;
1da177e4
LT		 204static sector_t sdebug_capacity; /* in sectors */
205
206/* old BIOS stuff, kernel may get rid of them but some mode sense pages
207 may still need them */
208static int sdebug_heads; /* heads per disk */
209static int sdebug_cylinders_per; /* cylinders per surface */
210static int sdebug_sectors_per; /* sectors per cylinder */
211
1da177e4
LT		 212#define SDEBUG_MAX_PARTS 4
213
214#define SDEBUG_SENSE_LEN 32
215
395cef03 216#define SCSI_DEBUG_MAX_CMD_LEN 32
9e603ca0 217
5b94e232
MP		 218static unsigned int scsi_debug_lbp(void)
219{
220 return scsi_debug_lbpu | scsi_debug_lbpws | scsi_debug_lbpws10;
221}
222
1da177e4
LT		 223struct sdebug_dev_info {
224 struct list_head dev_list;
225 unsigned char sense_buff[SDEBUG_SENSE_LEN]; /* weak nexus */
226 unsigned int channel;
227 unsigned int target;
228 unsigned int lun;
229 struct sdebug_host_info *sdbg_host;
c65b1445 230 unsigned int wlun;
1da177e4 231 char reset;
c65b1445 232 char stopped;
1da177e4
LT		 233 char used;
234};
235
236struct sdebug_host_info {
237 struct list_head host_list;
238 struct Scsi_Host *shost;
239 struct device dev;
240 struct list_head dev_info_list;
241};
242
243#define to_sdebug_host(d) \
244 container_of(d, struct sdebug_host_info, dev)
245
246static LIST_HEAD(sdebug_host_list);
247static DEFINE_SPINLOCK(sdebug_host_list_lock);
248
249typedef void (* done_funct_t) (struct scsi_cmnd *);
250
251struct sdebug_queued_cmd {
252 int in_use;
253 struct timer_list cmnd_timer;
254 done_funct_t done_funct;
255 struct scsi_cmnd * a_cmnd;
256 int scsi_result;
257};
258static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
259
1da177e4 260static unsigned char * fake_storep; /* ramdisk storage */
e18d8bea 261static struct sd_dif_tuple *dif_storep; /* protection info */
44d92694 262static void *map_storep; /* provisioning map */
1da177e4 263
44d92694 264static unsigned long map_size;
1da177e4
LT		 265static int num_aborts = 0;
266static int num_dev_resets = 0;
267static int num_bus_resets = 0;
268static int num_host_resets = 0;
c6a44287
MP		 269static int dix_writes;
270static int dix_reads;
271static int dif_errors;
1da177e4
LT		 272
273static DEFINE_SPINLOCK(queued_arr_lock);
274static DEFINE_RWLOCK(atomic_rw);
275
276static char sdebug_proc_name[] = "scsi_debug";
277
1da177e4
LT		 278static struct bus_type pseudo_lld_bus;
279
280static struct device_driver sdebug_driverfs_driver = {
281 .name = sdebug_proc_name,
282 .bus = &pseudo_lld_bus,
1da177e4
LT		 283};
284
285static const int check_condition_result =
286 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
287
c6a44287
MP		 288static const int illegal_condition_result =
289 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
290
c65b1445
DG		 291static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
292 0, 0, 0x2, 0x4b};
293static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
294 0, 0, 0x0, 0x0};
295
1da177e4
LT		 296static int sdebug_add_adapter(void);
297static void sdebug_remove_adapter(void);
1da177e4 298
8dea0d02
FT		 299static void sdebug_max_tgts_luns(void)
300{
301 struct sdebug_host_info *sdbg_host;
302 struct Scsi_Host *hpnt;
303
304 spin_lock(&sdebug_host_list_lock);
305 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
306 hpnt = sdbg_host->shost;
307 if ((hpnt->this_id >= 0) &&
308 (scsi_debug_num_tgts > hpnt->this_id))
309 hpnt->max_id = scsi_debug_num_tgts + 1;
310 else
311 hpnt->max_id = scsi_debug_num_tgts;
312 /* scsi_debug_max_luns; */
313 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS;
314 }
315 spin_unlock(&sdebug_host_list_lock);
316}
317
318static void mk_sense_buffer(struct sdebug_dev_info *devip, int key,
319 int asc, int asq)
320{
321 unsigned char *sbuff;
322
323 sbuff = devip->sense_buff;
324 memset(sbuff, 0, SDEBUG_SENSE_LEN);
325
326 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, key, asc, asq);
327
328 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
329 printk(KERN_INFO "scsi_debug: [sense_key,asc,ascq]: "
330 "[0x%x,0x%x,0x%x]\n", key, asc, asq);
331}
1da177e4 332
3de9f944 333static void get_data_transfer_info(unsigned char *cmd,
395cef03
MP		 334 unsigned long long *lba, unsigned int *num,
335 u32 *ei_lba)
3de9f944 336{
395cef03
MP		 337 *ei_lba = 0;
338
3de9f944 339 switch (*cmd) {
395cef03
MP		 340 case VARIABLE_LENGTH_CMD:
341 *lba = (u64)cmd[19] | (u64)cmd[18] << 8 |
342 (u64)cmd[17] << 16 | (u64)cmd[16] << 24 |
343 (u64)cmd[15] << 32 | (u64)cmd[14] << 40 |
344 (u64)cmd[13] << 48 | (u64)cmd[12] << 56;
345
346 *ei_lba = (u32)cmd[23] | (u32)cmd[22] << 8 |
347 (u32)cmd[21] << 16 | (u32)cmd[20] << 24;
348
349 *num = (u32)cmd[31] | (u32)cmd[30] << 8 | (u32)cmd[29] << 16 |
350 (u32)cmd[28] << 24;
351 break;
352
44d92694 353 case WRITE_SAME_16:
3de9f944
FT		 354 case WRITE_16:
355 case READ_16:
d5cdc989
FT		 356 *lba = (u64)cmd[9] | (u64)cmd[8] << 8 |
357 (u64)cmd[7] << 16 | (u64)cmd[6] << 24 |
358 (u64)cmd[5] << 32 | (u64)cmd[4] << 40 |
359 (u64)cmd[3] << 48 | (u64)cmd[2] << 56;
360
361 *num = (u32)cmd[13] | (u32)cmd[12] << 8 | (u32)cmd[11] << 16 |
362 (u32)cmd[10] << 24;
3de9f944
FT		 363 break;
364 case WRITE_12:
365 case READ_12:
d5cdc989
FT		 366 *lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 |
367 (u32)cmd[2] << 24;
368
369 *num = (u32)cmd[9] | (u32)cmd[8] << 8 | (u32)cmd[7] << 16 |
370 (u32)cmd[6] << 24;
3de9f944 371 break;
44d92694 372 case WRITE_SAME:
3de9f944
FT		 373 case WRITE_10:
374 case READ_10:
c639d14e 375 case XDWRITEREAD_10:
d5cdc989
FT		 376 *lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 |
377 (u32)cmd[2] << 24;
378
379 *num = (u32)cmd[8] | (u32)cmd[7] << 8;
3de9f944
FT		 380 break;
381 case WRITE_6:
382 case READ_6:
d5cdc989
FT		 383 *lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
384 (u32)(cmd[1] & 0x1f) << 16;
3de9f944
FT		 385 *num = (0 == cmd[4]) ? 256 : cmd[4];
386 break;
387 default:
388 break;
389 }
390}
1da177e4 391
1da177e4
LT		 392static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
393{
394 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
395 printk(KERN_INFO "scsi_debug: ioctl: cmd=0x%x\n", cmd);
396 }
397 return -EINVAL;
398 /* return -ENOTTY; // correct return but upsets fdisk */
399}
400
c65b1445
DG		 401static int check_readiness(struct scsi_cmnd * SCpnt, int reset_only,
402 struct sdebug_dev_info * devip)
1da177e4
LT		 403{
404 if (devip->reset) {
405 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
406 printk(KERN_INFO "scsi_debug: Reporting Unit "
407 "attention: power on reset\n");
408 devip->reset = 0;
409 mk_sense_buffer(devip, UNIT_ATTENTION, POWERON_RESET, 0);
410 return check_condition_result;
411 }
c65b1445
DG		 412 if ((0 == reset_only) && devip->stopped) {
413 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
414 printk(KERN_INFO "scsi_debug: Reporting Not "
415 "ready: initializing command required\n");
416 mk_sense_buffer(devip, NOT_READY, LOGICAL_UNIT_NOT_READY,
417 0x2);
418 return check_condition_result;
419 }
1da177e4
LT		 420 return 0;
421}
422
423/* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */
21a61829 424static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1da177e4
LT		 425 int arr_len)
426{
21a61829 427 int act_len;
072d0bb3 428 struct scsi_data_buffer *sdb = scsi_in(scp);
1da177e4 429
072d0bb3 430 if (!sdb->length)
1da177e4 431 return 0;
072d0bb3 432 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
1da177e4 433 return (DID_ERROR << 16);
21a61829
FT		 434
435 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
436 arr, arr_len);
a4517511 437 sdb->resid = scsi_bufflen(scp) - act_len;
21a61829 438
1da177e4
LT		 439 return 0;
440}
441
442/* Returns number of bytes fetched into 'arr' or -1 if error. */
21a61829
FT		 443static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
444 int arr_len)
1da177e4 445{
21a61829 446 if (!scsi_bufflen(scp))
1da177e4 447 return 0;
072d0bb3 448 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE))
1da177e4 449 return -1;
21a61829
FT		 450
451 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
1da177e4
LT		 452}
453
454
455static const char * inq_vendor_id = "Linux ";
456static const char * inq_product_id = "scsi_debug ";
457static const char * inq_product_rev = "0004";
458
5a09e398
HR		 459static int inquiry_evpd_83(unsigned char * arr, int port_group_id,
460 int target_dev_id, int dev_id_num,
461 const char * dev_id_str,
c65b1445 462 int dev_id_str_len)
1da177e4 463{
c65b1445
DG		 464 int num, port_a;
465 char b[32];
1da177e4 466
c65b1445 467 port_a = target_dev_id + 1;
1da177e4
LT		 468 /* T10 vendor identifier field format (faked) */
469 arr[0] = 0x2; /* ASCII */
470 arr[1] = 0x1;
471 arr[2] = 0x0;
472 memcpy(&arr[4], inq_vendor_id, 8);
473 memcpy(&arr[12], inq_product_id, 16);
474 memcpy(&arr[28], dev_id_str, dev_id_str_len);
475 num = 8 + 16 + dev_id_str_len;
476 arr[3] = num;
477 num += 4;
c65b1445
DG		 478 if (dev_id_num >= 0) {
479 /* NAA-5, Logical unit identifier (binary) */
480 arr[num++] = 0x1; /* binary (not necessarily sas) */
481 arr[num++] = 0x3; /* PIV=0, lu, naa */
482 arr[num++] = 0x0;
483 arr[num++] = 0x8;
484 arr[num++] = 0x53; /* naa-5 ieee company id=0x333333 (fake) */
485 arr[num++] = 0x33;
486 arr[num++] = 0x33;
487 arr[num++] = 0x30;
488 arr[num++] = (dev_id_num >> 24);
489 arr[num++] = (dev_id_num >> 16) & 0xff;
490 arr[num++] = (dev_id_num >> 8) & 0xff;
491 arr[num++] = dev_id_num & 0xff;
492 /* Target relative port number */
493 arr[num++] = 0x61; /* proto=sas, binary */
494 arr[num++] = 0x94; /* PIV=1, target port, rel port */
495 arr[num++] = 0x0; /* reserved */
496 arr[num++] = 0x4; /* length */
497 arr[num++] = 0x0; /* reserved */
498 arr[num++] = 0x0; /* reserved */
499 arr[num++] = 0x0;
500 arr[num++] = 0x1; /* relative port A */
501 }
502 /* NAA-5, Target port identifier */
503 arr[num++] = 0x61; /* proto=sas, binary */
504 arr[num++] = 0x93; /* piv=1, target port, naa */
505 arr[num++] = 0x0;
506 arr[num++] = 0x8;
507 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
508 arr[num++] = 0x22;
509 arr[num++] = 0x22;
510 arr[num++] = 0x20;
511 arr[num++] = (port_a >> 24);
512 arr[num++] = (port_a >> 16) & 0xff;
513 arr[num++] = (port_a >> 8) & 0xff;
514 arr[num++] = port_a & 0xff;
5a09e398
HR		 515 /* NAA-5, Target port group identifier */
516 arr[num++] = 0x61; /* proto=sas, binary */
517 arr[num++] = 0x95; /* piv=1, target port group id */
518 arr[num++] = 0x0;
519 arr[num++] = 0x4;
520 arr[num++] = 0;
521 arr[num++] = 0;
522 arr[num++] = (port_group_id >> 8) & 0xff;
523 arr[num++] = port_group_id & 0xff;
c65b1445
DG		 524 /* NAA-5, Target device identifier */
525 arr[num++] = 0x61; /* proto=sas, binary */
526 arr[num++] = 0xa3; /* piv=1, target device, naa */
527 arr[num++] = 0x0;
528 arr[num++] = 0x8;
529 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
530 arr[num++] = 0x22;
531 arr[num++] = 0x22;
532 arr[num++] = 0x20;
533 arr[num++] = (target_dev_id >> 24);
534 arr[num++] = (target_dev_id >> 16) & 0xff;
535 arr[num++] = (target_dev_id >> 8) & 0xff;
536 arr[num++] = target_dev_id & 0xff;
537 /* SCSI name string: Target device identifier */
538 arr[num++] = 0x63; /* proto=sas, UTF-8 */
539 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
540 arr[num++] = 0x0;
541 arr[num++] = 24;
542 memcpy(arr + num, "naa.52222220", 12);
543 num += 12;
544 snprintf(b, sizeof(b), "%08X", target_dev_id);
545 memcpy(arr + num, b, 8);
546 num += 8;
547 memset(arr + num, 0, 4);
548 num += 4;
549 return num;
550}
551
552
553static unsigned char vpd84_data[] = {
554/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
555 0x22,0x22,0x22,0x0,0xbb,0x1,
556 0x22,0x22,0x22,0x0,0xbb,0x2,
557};
558
559static int inquiry_evpd_84(unsigned char * arr)
560{
561 memcpy(arr, vpd84_data, sizeof(vpd84_data));
562 return sizeof(vpd84_data);
563}
564
565static int inquiry_evpd_85(unsigned char * arr)
566{
567 int num = 0;
568 const char * na1 = "https://www.kernel.org/config";
569 const char * na2 = "http://www.kernel.org/log";
570 int plen, olen;
571
572 arr[num++] = 0x1; /* lu, storage config */
573 arr[num++] = 0x0; /* reserved */
574 arr[num++] = 0x0;
575 olen = strlen(na1);
576 plen = olen + 1;
577 if (plen % 4)
578 plen = ((plen / 4) + 1) * 4;
579 arr[num++] = plen; /* length, null termianted, padded */
580 memcpy(arr + num, na1, olen);
581 memset(arr + num + olen, 0, plen - olen);
582 num += plen;
583
584 arr[num++] = 0x4; /* lu, logging */
585 arr[num++] = 0x0; /* reserved */
586 arr[num++] = 0x0;
587 olen = strlen(na2);
588 plen = olen + 1;
589 if (plen % 4)
590 plen = ((plen / 4) + 1) * 4;
591 arr[num++] = plen; /* length, null terminated, padded */
592 memcpy(arr + num, na2, olen);
593 memset(arr + num + olen, 0, plen - olen);
594 num += plen;
595
596 return num;
597}
598
599/* SCSI ports VPD page */
600static int inquiry_evpd_88(unsigned char * arr, int target_dev_id)
601{
602 int num = 0;
603 int port_a, port_b;
604
605 port_a = target_dev_id + 1;
606 port_b = port_a + 1;
607 arr[num++] = 0x0; /* reserved */
608 arr[num++] = 0x0; /* reserved */
609 arr[num++] = 0x0;
610 arr[num++] = 0x1; /* relative port 1 (primary) */
611 memset(arr + num, 0, 6);
612 num += 6;
613 arr[num++] = 0x0;
614 arr[num++] = 12; /* length tp descriptor */
615 /* naa-5 target port identifier (A) */
616 arr[num++] = 0x61; /* proto=sas, binary */
617 arr[num++] = 0x93; /* PIV=1, target port, NAA */
618 arr[num++] = 0x0; /* reserved */
619 arr[num++] = 0x8; /* length */
620 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
621 arr[num++] = 0x22;
622 arr[num++] = 0x22;
623 arr[num++] = 0x20;
624 arr[num++] = (port_a >> 24);
625 arr[num++] = (port_a >> 16) & 0xff;
626 arr[num++] = (port_a >> 8) & 0xff;
627 arr[num++] = port_a & 0xff;
628
629 arr[num++] = 0x0; /* reserved */
630 arr[num++] = 0x0; /* reserved */
631 arr[num++] = 0x0;
632 arr[num++] = 0x2; /* relative port 2 (secondary) */
633 memset(arr + num, 0, 6);
634 num += 6;
635 arr[num++] = 0x0;
636 arr[num++] = 12; /* length tp descriptor */
637 /* naa-5 target port identifier (B) */
638 arr[num++] = 0x61; /* proto=sas, binary */
639 arr[num++] = 0x93; /* PIV=1, target port, NAA */
640 arr[num++] = 0x0; /* reserved */
641 arr[num++] = 0x8; /* length */
642 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
643 arr[num++] = 0x22;
644 arr[num++] = 0x22;
645 arr[num++] = 0x20;
646 arr[num++] = (port_b >> 24);
647 arr[num++] = (port_b >> 16) & 0xff;
648 arr[num++] = (port_b >> 8) & 0xff;
649 arr[num++] = port_b & 0xff;
650
651 return num;
652}
653
654
655static unsigned char vpd89_data[] = {
656/* from 4th byte */ 0,0,0,0,
657'l','i','n','u','x',' ',' ',' ',
658'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
659'1','2','3','4',
6600x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
6610xec,0,0,0,
6620x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
6630,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
6640x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
6650x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
6660x53,0x41,
6670x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
6680x20,0x20,
6690x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
6700x10,0x80,
6710,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
6720x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
6730x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
6740,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
6750x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
6760x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
6770,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
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,
6810x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
6820,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
6830xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
6840,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
6850,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6860,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6870,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6880,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6890,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6900,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6910,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6920,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6930,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6940,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6950,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
6960,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
697};
698
699static int inquiry_evpd_89(unsigned char * arr)
700{
701 memcpy(arr, vpd89_data, sizeof(vpd89_data));
702 return sizeof(vpd89_data);
703}
704
705
1e49f785 706/* Block limits VPD page (SBC-3) */
c65b1445 707static unsigned char vpdb0_data[] = {
1e49f785
DG		 708 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
709 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
710 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
711 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
c65b1445
DG		 712};
713
714static int inquiry_evpd_b0(unsigned char * arr)
715{
ea61fca5
MP		 716 unsigned int gran;
717
c65b1445 718 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
e308b3d1
MP		 719
720 /* Optimal transfer length granularity */
ea61fca5
MP		 721 gran = 1 << scsi_debug_physblk_exp;
722 arr[2] = (gran >> 8) & 0xff;
723 arr[3] = gran & 0xff;
e308b3d1
MP		 724
725 /* Maximum Transfer Length */
c65b1445
DG		 726 if (sdebug_store_sectors > 0x400) {
727 arr[4] = (sdebug_store_sectors >> 24) & 0xff;
728 arr[5] = (sdebug_store_sectors >> 16) & 0xff;
729 arr[6] = (sdebug_store_sectors >> 8) & 0xff;
730 arr[7] = sdebug_store_sectors & 0xff;
731 }
44d92694 732
e308b3d1
MP		 733 /* Optimal Transfer Length */
734 put_unaligned_be32(scsi_debug_opt_blks, &arr[8]);
735
5b94e232 736 if (scsi_debug_lbpu) {
e308b3d1 737 /* Maximum Unmap LBA Count */
6014759c 738 put_unaligned_be32(scsi_debug_unmap_max_blocks, &arr[16]);
e308b3d1
MP		 739
740 /* Maximum Unmap Block Descriptor Count */
44d92694
MP		 741 put_unaligned_be32(scsi_debug_unmap_max_desc, &arr[20]);
742 }
743
e308b3d1 744 /* Unmap Granularity Alignment */
44d92694
MP		 745 if (scsi_debug_unmap_alignment) {
746 put_unaligned_be32(scsi_debug_unmap_alignment, &arr[28]);
747 arr[28] |= 0x80; /* UGAVALID */
748 }
749
e308b3d1 750 /* Optimal Unmap Granularity */
6014759c
MP		 751 put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]);
752
5b94e232
MP		 753 /* Maximum WRITE SAME Length */
754 put_unaligned_be64(scsi_debug_write_same_length, &arr[32]);
755
756 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
44d92694 757
c65b1445 758 return sizeof(vpdb0_data);
1da177e4
LT		 759}
760
1e49f785 761/* Block device characteristics VPD page (SBC-3) */
eac6e8e4
MW		 762static int inquiry_evpd_b1(unsigned char *arr)
763{
764 memset(arr, 0, 0x3c);
765 arr[0] = 0;
1e49f785
DG		 766 arr[1] = 1; /* non rotating medium (e.g. solid state) */
767 arr[2] = 0;
768 arr[3] = 5; /* less than 1.8" */
eac6e8e4
MW		 769
770 return 0x3c;
771}
1da177e4 772
be1dd78d 773/* Logical block provisioning VPD page (SBC-3) */
6014759c
MP		 774static int inquiry_evpd_b2(unsigned char *arr)
775{
3f0bc3b3 776 memset(arr, 0, 0x4);
6014759c
MP		 777 arr[0] = 0; /* threshold exponent */
778
5b94e232 779 if (scsi_debug_lbpu)
6014759c
MP		 780 arr[1] = 1 << 7;
781
5b94e232 782 if (scsi_debug_lbpws)
6014759c
MP		 783 arr[1] |= 1 << 6;
784
5b94e232
MP		 785 if (scsi_debug_lbpws10)
786 arr[1] |= 1 << 5;
787
be1dd78d
ES		 788 if (scsi_debug_lbprz)
789 arr[1] |= 1 << 2;
790
3f0bc3b3 791 return 0x4;
6014759c
MP		 792}
793
1da177e4 794#define SDEBUG_LONG_INQ_SZ 96
c65b1445 795#define SDEBUG_MAX_INQ_ARR_SZ 584
1da177e4
LT		 796
797static int resp_inquiry(struct scsi_cmnd * scp, int target,
798 struct sdebug_dev_info * devip)
799{
800 unsigned char pq_pdt;
5a09e398 801 unsigned char * arr;
1da177e4 802 unsigned char *cmd = (unsigned char *)scp->cmnd;
5a09e398 803 int alloc_len, n, ret;
1da177e4
LT		 804
805 alloc_len = (cmd[3] << 8) + cmd[4];
6f3cbf55
DG		 806 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
807 if (! arr)
808 return DID_REQUEUE << 16;
c65b1445
DG		 809 if (devip->wlun)
810 pq_pdt = 0x1e; /* present, wlun */
811 else if (scsi_debug_no_lun_0 && (0 == devip->lun))
812 pq_pdt = 0x7f; /* not present, no device type */
813 else
814 pq_pdt = (scsi_debug_ptype & 0x1f);
1da177e4
LT		 815 arr[0] = pq_pdt;
816 if (0x2 & cmd[1]) { /* CMDDT bit set */
817 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
818 0);
5a09e398 819 kfree(arr);
1da177e4
LT		 820 return check_condition_result;
821 } else if (0x1 & cmd[1]) { /* EVPD bit set */
5a09e398 822 int lu_id_num, port_group_id, target_dev_id, len;
c65b1445
DG		 823 char lu_id_str[6];
824 int host_no = devip->sdbg_host->shost->host_no;
1da177e4 825
5a09e398
HR		 826 port_group_id = (((host_no + 1) & 0x7f) << 8) +
827 (devip->channel & 0x7f);
23183910
DG		 828 if (0 == scsi_debug_vpd_use_hostno)
829 host_no = 0;
c65b1445
DG		 830 lu_id_num = devip->wlun ? -1 : (((host_no + 1) * 2000) +
831 (devip->target * 1000) + devip->lun);
832 target_dev_id = ((host_no + 1) * 2000) +
833 (devip->target * 1000) - 3;
834 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
1da177e4 835 if (0 == cmd[2]) { /* supported vital product data pages */
c65b1445
DG		 836 arr[1] = cmd[2]; /*sanity */
837 n = 4;
838 arr[n++] = 0x0; /* this page */
839 arr[n++] = 0x80; /* unit serial number */
840 arr[n++] = 0x83; /* device identification */
841 arr[n++] = 0x84; /* software interface ident. */
842 arr[n++] = 0x85; /* management network addresses */
843 arr[n++] = 0x86; /* extended inquiry */
844 arr[n++] = 0x87; /* mode page policy */
845 arr[n++] = 0x88; /* SCSI ports */
846 arr[n++] = 0x89; /* ATA information */
847 arr[n++] = 0xb0; /* Block limits (SBC) */
eac6e8e4 848 arr[n++] = 0xb1; /* Block characteristics (SBC) */
5b94e232
MP		 849 if (scsi_debug_lbp()) /* Logical Block Prov. (SBC) */
850 arr[n++] = 0xb2;
c65b1445 851 arr[3] = n - 4; /* number of supported VPD pages */
1da177e4 852 } else if (0x80 == cmd[2]) { /* unit serial number */
c65b1445 853 arr[1] = cmd[2]; /*sanity */
1da177e4 854 arr[3] = len;
c65b1445 855 memcpy(&arr[4], lu_id_str, len);
1da177e4 856 } else if (0x83 == cmd[2]) { /* device identification */
c65b1445 857 arr[1] = cmd[2]; /*sanity */
5a09e398
HR		 858 arr[3] = inquiry_evpd_83(&arr[4], port_group_id,
859 target_dev_id, lu_id_num,
860 lu_id_str, len);
c65b1445
DG		 861 } else if (0x84 == cmd[2]) { /* Software interface ident. */
862 arr[1] = cmd[2]; /*sanity */
863 arr[3] = inquiry_evpd_84(&arr[4]);
864 } else if (0x85 == cmd[2]) { /* Management network addresses */
865 arr[1] = cmd[2]; /*sanity */
866 arr[3] = inquiry_evpd_85(&arr[4]);
867 } else if (0x86 == cmd[2]) { /* extended inquiry */
868 arr[1] = cmd[2]; /*sanity */
869 arr[3] = 0x3c; /* number of following entries */
c6a44287
MP		 870 if (scsi_debug_dif == SD_DIF_TYPE3_PROTECTION)
871 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
872 else if (scsi_debug_dif)
873 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
874 else
875 arr[4] = 0x0; /* no protection stuff */
c65b1445
DG		 876 arr[5] = 0x7; /* head of q, ordered + simple q's */
877 } else if (0x87 == cmd[2]) { /* mode page policy */
878 arr[1] = cmd[2]; /*sanity */
879 arr[3] = 0x8; /* number of following entries */
880 arr[4] = 0x2; /* disconnect-reconnect mp */
881 arr[6] = 0x80; /* mlus, shared */
882 arr[8] = 0x18; /* protocol specific lu */
883 arr[10] = 0x82; /* mlus, per initiator port */
884 } else if (0x88 == cmd[2]) { /* SCSI Ports */
885 arr[1] = cmd[2]; /*sanity */
886 arr[3] = inquiry_evpd_88(&arr[4], target_dev_id);
887 } else if (0x89 == cmd[2]) { /* ATA information */
888 arr[1] = cmd[2]; /*sanity */
889 n = inquiry_evpd_89(&arr[4]);
890 arr[2] = (n >> 8);
891 arr[3] = (n & 0xff);
892 } else if (0xb0 == cmd[2]) { /* Block limits (SBC) */
893 arr[1] = cmd[2]; /*sanity */
894 arr[3] = inquiry_evpd_b0(&arr[4]);
eac6e8e4
MW		 895 } else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */
896 arr[1] = cmd[2]; /*sanity */
897 arr[3] = inquiry_evpd_b1(&arr[4]);
5b94e232 898 } else if (0xb2 == cmd[2]) { /* Logical Block Prov. (SBC) */
6014759c
MP		 899 arr[1] = cmd[2]; /*sanity */
900 arr[3] = inquiry_evpd_b2(&arr[4]);
1da177e4
LT		 901 } else {
902 /* Illegal request, invalid field in cdb */
903 mk_sense_buffer(devip, ILLEGAL_REQUEST,
904 INVALID_FIELD_IN_CDB, 0);
5a09e398 905 kfree(arr);
1da177e4
LT		 906 return check_condition_result;
907 }
c65b1445 908 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
5a09e398 909 ret = fill_from_dev_buffer(scp, arr,
c65b1445 910 min(len, SDEBUG_MAX_INQ_ARR_SZ));
5a09e398
HR		 911 kfree(arr);
912 return ret;
1da177e4
LT		 913 }
914 /* drops through here for a standard inquiry */
d986788b 915 arr[1] = scsi_debug_removable ? 0x80 : 0; /* Removable disk */
1da177e4
LT		 916 arr[2] = scsi_debug_scsi_level;
917 arr[3] = 2; /* response_data_format==2 */
918 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
c6a44287 919 arr[5] = scsi_debug_dif ? 1 : 0; /* PROTECT bit */
5a09e398
HR		 920 if (0 == scsi_debug_vpd_use_hostno)
921 arr[5] = 0x10; /* claim: implicit TGPS */
c65b1445 922 arr[6] = 0x10; /* claim: MultiP */
1da177e4 923 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
c65b1445 924 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
1da177e4
LT		 925 memcpy(&arr[8], inq_vendor_id, 8);
926 memcpy(&arr[16], inq_product_id, 16);
927 memcpy(&arr[32], inq_product_rev, 4);
928 /* version descriptors (2 bytes each) follow */
c65b1445
DG		 929 arr[58] = 0x0; arr[59] = 0x77; /* SAM-3 ANSI */
930 arr[60] = 0x3; arr[61] = 0x14; /* SPC-3 ANSI */
931 n = 62;
1da177e4 932 if (scsi_debug_ptype == 0) {
c65b1445 933 arr[n++] = 0x3; arr[n++] = 0x3d; /* SBC-2 ANSI */
1da177e4 934 } else if (scsi_debug_ptype == 1) {
c65b1445 935 arr[n++] = 0x3; arr[n++] = 0x60; /* SSC-2 no version */
1da177e4 936 }
c65b1445 937 arr[n++] = 0xc; arr[n++] = 0xf; /* SAS-1.1 rev 10 */
5a09e398 938 ret = fill_from_dev_buffer(scp, arr,
1da177e4 939 min(alloc_len, SDEBUG_LONG_INQ_SZ));
5a09e398
HR		 940 kfree(arr);
941 return ret;
1da177e4
LT		 942}
943
944static int resp_requests(struct scsi_cmnd * scp,
945 struct sdebug_dev_info * devip)
946{
947 unsigned char * sbuff;
948 unsigned char *cmd = (unsigned char *)scp->cmnd;
949 unsigned char arr[SDEBUG_SENSE_LEN];
c65b1445 950 int want_dsense;
1da177e4
LT		 951 int len = 18;
952
c65b1445 953 memset(arr, 0, sizeof(arr));
1da177e4 954 if (devip->reset == 1)
c65b1445
DG		 955 mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0);
956 want_dsense = !!(cmd[1] & 1) || scsi_debug_dsense;
1da177e4 957 sbuff = devip->sense_buff;
c65b1445
DG		 958 if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
959 if (want_dsense) {
960 arr[0] = 0x72;
961 arr[1] = 0x0; /* NO_SENSE in sense_key */
962 arr[2] = THRESHOLD_EXCEEDED;
963 arr[3] = 0xff; /* TEST set and MRIE==6 */
964 } else {
965 arr[0] = 0x70;
966 arr[2] = 0x0; /* NO_SENSE in sense_key */
967 arr[7] = 0xa; /* 18 byte sense buffer */
968 arr[12] = THRESHOLD_EXCEEDED;
969 arr[13] = 0xff; /* TEST set and MRIE==6 */
970 }
c65b1445 971 } else {
1da177e4 972 memcpy(arr, sbuff, SDEBUG_SENSE_LEN);
c65b1445
DG		 973 if ((cmd[1] & 1) && (! scsi_debug_dsense)) {
974 /* DESC bit set and sense_buff in fixed format */
975 memset(arr, 0, sizeof(arr));
976 arr[0] = 0x72;
977 arr[1] = sbuff[2]; /* sense key */
978 arr[2] = sbuff[12]; /* asc */
979 arr[3] = sbuff[13]; /* ascq */
980 len = 8;
981 }
982 }
983 mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0);
1da177e4
LT		 984 return fill_from_dev_buffer(scp, arr, len);
985}
986
c65b1445
DG		 987static int resp_start_stop(struct scsi_cmnd * scp,
988 struct sdebug_dev_info * devip)
989{
990 unsigned char *cmd = (unsigned char *)scp->cmnd;
991 int power_cond, errsts, start;
992
993 if ((errsts = check_readiness(scp, 1, devip)))
994 return errsts;
995 power_cond = (cmd[4] & 0xf0) >> 4;
996 if (power_cond) {
997 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
998 0);
999 return check_condition_result;
1000 }
1001 start = cmd[4] & 1;
1002 if (start == devip->stopped)
1003 devip->stopped = !start;
1004 return 0;
1005}
1006
28898873
FT		 1007static sector_t get_sdebug_capacity(void)
1008{
1009 if (scsi_debug_virtual_gb > 0)
5447ed6c
DG		 1010 return (sector_t)scsi_debug_virtual_gb *
1011 (1073741824 / scsi_debug_sector_size);
28898873
FT		 1012 else
1013 return sdebug_store_sectors;
1014}
1015
1da177e4
LT		 1016#define SDEBUG_READCAP_ARR_SZ 8
1017static int resp_readcap(struct scsi_cmnd * scp,
1018 struct sdebug_dev_info * devip)
1019{
1020 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
c65b1445 1021 unsigned int capac;
1da177e4
LT		 1022 int errsts;
1023
c65b1445 1024 if ((errsts = check_readiness(scp, 1, devip)))
1da177e4 1025 return errsts;
c65b1445 1026 /* following just in case virtual_gb changed */
28898873 1027 sdebug_capacity = get_sdebug_capacity();
1da177e4 1028 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
c65b1445
DG		 1029 if (sdebug_capacity < 0xffffffff) {
1030 capac = (unsigned int)sdebug_capacity - 1;
1031 arr[0] = (capac >> 24);
1032 arr[1] = (capac >> 16) & 0xff;
1033 arr[2] = (capac >> 8) & 0xff;
1034 arr[3] = capac & 0xff;
1035 } else {
1036 arr[0] = 0xff;
1037 arr[1] = 0xff;
1038 arr[2] = 0xff;
1039 arr[3] = 0xff;
1040 }
597136ab
MP		 1041 arr[6] = (scsi_debug_sector_size >> 8) & 0xff;
1042 arr[7] = scsi_debug_sector_size & 0xff;
1da177e4
LT		 1043 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1044}
1045
c65b1445
DG		 1046#define SDEBUG_READCAP16_ARR_SZ 32
1047static int resp_readcap16(struct scsi_cmnd * scp,
1048 struct sdebug_dev_info * devip)
1049{
1050 unsigned char *cmd = (unsigned char *)scp->cmnd;
1051 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
1052 unsigned long long capac;
1053 int errsts, k, alloc_len;
1054
1055 if ((errsts = check_readiness(scp, 1, devip)))
1056 return errsts;
1057 alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8)
1058 + cmd[13]);
1059 /* following just in case virtual_gb changed */
28898873 1060 sdebug_capacity = get_sdebug_capacity();
c65b1445
DG		 1061 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
1062 capac = sdebug_capacity - 1;
1063 for (k = 0; k < 8; ++k, capac >>= 8)
1064 arr[7 - k] = capac & 0xff;
597136ab
MP		 1065 arr[8] = (scsi_debug_sector_size >> 24) & 0xff;
1066 arr[9] = (scsi_debug_sector_size >> 16) & 0xff;
1067 arr[10] = (scsi_debug_sector_size >> 8) & 0xff;
1068 arr[11] = scsi_debug_sector_size & 0xff;
ea61fca5
MP		 1069 arr[13] = scsi_debug_physblk_exp & 0xf;
1070 arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f;
44d92694 1071
be1dd78d 1072 if (scsi_debug_lbp()) {
5b94e232 1073 arr[14] |= 0x80; /* LBPME */
be1dd78d
ES		 1074 if (scsi_debug_lbprz)
1075 arr[14] |= 0x40; /* LBPRZ */
1076 }
44d92694 1077
ea61fca5 1078 arr[15] = scsi_debug_lowest_aligned & 0xff;
c6a44287
MP		 1079
1080 if (scsi_debug_dif) {
1081 arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */
1082 arr[12] |= 1; /* PROT_EN */
1083 }
1084
c65b1445
DG		 1085 return fill_from_dev_buffer(scp, arr,
1086 min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
1087}
1088
5a09e398
HR		 1089#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1090
1091static int resp_report_tgtpgs(struct scsi_cmnd * scp,
1092 struct sdebug_dev_info * devip)
1093{
1094 unsigned char *cmd = (unsigned char *)scp->cmnd;
1095 unsigned char * arr;
1096 int host_no = devip->sdbg_host->shost->host_no;
1097 int n, ret, alen, rlen;
1098 int port_group_a, port_group_b, port_a, port_b;
1099
1100 alen = ((cmd[6] << 24) + (cmd[7] << 16) + (cmd[8] << 8)
1101 + cmd[9]);
1102
6f3cbf55
DG		 1103 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1104 if (! arr)
1105 return DID_REQUEUE << 16;
5a09e398
HR		 1106 /*
1107 * EVPD page 0x88 states we have two ports, one
1108 * real and a fake port with no device connected.
1109 * So we create two port groups with one port each
1110 * and set the group with port B to unavailable.
1111 */
1112 port_a = 0x1; /* relative port A */
1113 port_b = 0x2; /* relative port B */
1114 port_group_a = (((host_no + 1) & 0x7f) << 8) +
1115 (devip->channel & 0x7f);
1116 port_group_b = (((host_no + 1) & 0x7f) << 8) +
1117 (devip->channel & 0x7f) + 0x80;
1118
1119 /*
1120 * The asymmetric access state is cycled according to the host_id.
1121 */
1122 n = 4;
1123 if (0 == scsi_debug_vpd_use_hostno) {
1124 arr[n++] = host_no % 3; /* Asymm access state */
1125 arr[n++] = 0x0F; /* claim: all states are supported */
1126 } else {
1127 arr[n++] = 0x0; /* Active/Optimized path */
1128 arr[n++] = 0x01; /* claim: only support active/optimized paths */
1129 }
1130 arr[n++] = (port_group_a >> 8) & 0xff;
1131 arr[n++] = port_group_a & 0xff;
1132 arr[n++] = 0; /* Reserved */
1133 arr[n++] = 0; /* Status code */
1134 arr[n++] = 0; /* Vendor unique */
1135 arr[n++] = 0x1; /* One port per group */
1136 arr[n++] = 0; /* Reserved */
1137 arr[n++] = 0; /* Reserved */
1138 arr[n++] = (port_a >> 8) & 0xff;
1139 arr[n++] = port_a & 0xff;
1140 arr[n++] = 3; /* Port unavailable */
1141 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
1142 arr[n++] = (port_group_b >> 8) & 0xff;
1143 arr[n++] = port_group_b & 0xff;
1144 arr[n++] = 0; /* Reserved */
1145 arr[n++] = 0; /* Status code */
1146 arr[n++] = 0; /* Vendor unique */
1147 arr[n++] = 0x1; /* One port per group */
1148 arr[n++] = 0; /* Reserved */
1149 arr[n++] = 0; /* Reserved */
1150 arr[n++] = (port_b >> 8) & 0xff;
1151 arr[n++] = port_b & 0xff;
1152
1153 rlen = n - 4;
1154 arr[0] = (rlen >> 24) & 0xff;
1155 arr[1] = (rlen >> 16) & 0xff;
1156 arr[2] = (rlen >> 8) & 0xff;
1157 arr[3] = rlen & 0xff;
1158
1159 /*
1160 * Return the smallest value of either
1161 * - The allocated length
1162 * - The constructed command length
1163 * - The maximum array size
1164 */
1165 rlen = min(alen,n);
1166 ret = fill_from_dev_buffer(scp, arr,
1167 min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1168 kfree(arr);
1169 return ret;
1170}
1171
1da177e4
LT		 1172/* <<Following mode page info copied from ST318451LW>> */
1173
1174static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target)
1175{ /* Read-Write Error Recovery page for mode_sense */
1176 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
1177 5, 0, 0xff, 0xff};
1178
1179 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
1180 if (1 == pcontrol)
1181 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
1182 return sizeof(err_recov_pg);
1183}
1184
1185static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target)
1186{ /* Disconnect-Reconnect page for mode_sense */
1187 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
1188 0, 0, 0, 0, 0, 0, 0, 0};
1189
1190 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
1191 if (1 == pcontrol)
1192 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
1193 return sizeof(disconnect_pg);
1194}
1195
1196static int resp_format_pg(unsigned char * p, int pcontrol, int target)
1197{ /* Format device page for mode_sense */
597136ab
MP		 1198 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
1199 0, 0, 0, 0, 0, 0, 0, 0,
1200 0, 0, 0, 0, 0x40, 0, 0, 0};
1201
1202 memcpy(p, format_pg, sizeof(format_pg));
1203 p[10] = (sdebug_sectors_per >> 8) & 0xff;
1204 p[11] = sdebug_sectors_per & 0xff;
1205 p[12] = (scsi_debug_sector_size >> 8) & 0xff;
1206 p[13] = scsi_debug_sector_size & 0xff;
d986788b 1207 if (scsi_debug_removable)
597136ab
MP		 1208 p[20] |= 0x20; /* should agree with INQUIRY */
1209 if (1 == pcontrol)
1210 memset(p + 2, 0, sizeof(format_pg) - 2);
1211 return sizeof(format_pg);
1da177e4
LT		 1212}
1213
1214static int resp_caching_pg(unsigned char * p, int pcontrol, int target)
1215{ /* Caching page for mode_sense */
1216 unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
1217 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
1218
1219 memcpy(p, caching_pg, sizeof(caching_pg));
1220 if (1 == pcontrol)
1221 memset(p + 2, 0, sizeof(caching_pg) - 2);
1222 return sizeof(caching_pg);
1223}
1224
1225static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
1226{ /* Control mode page for mode_sense */
c65b1445
DG		 1227 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
1228 0, 0, 0, 0};
1229 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
1da177e4
LT		 1230 0, 0, 0x2, 0x4b};
1231
1232 if (scsi_debug_dsense)
1233 ctrl_m_pg[2] |= 0x4;
c65b1445
DG		 1234 else
1235 ctrl_m_pg[2] &= ~0x4;
c6a44287
MP		 1236
1237 if (scsi_debug_ato)
1238 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
1239
1da177e4
LT		 1240 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
1241 if (1 == pcontrol)
c65b1445
DG		 1242 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
1243 else if (2 == pcontrol)
1244 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
1da177e4
LT		 1245 return sizeof(ctrl_m_pg);
1246}
1247
c65b1445 1248
1da177e4
LT		 1249static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target)
1250{ /* Informational Exceptions control mode page for mode_sense */
c65b1445
DG		 1251 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
1252 0, 0, 0x0, 0x0};
1253 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1254 0, 0, 0x0, 0x0};
1255
1da177e4
LT		 1256 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
1257 if (1 == pcontrol)
c65b1445
DG		 1258 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
1259 else if (2 == pcontrol)
1260 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
1da177e4
LT		 1261 return sizeof(iec_m_pg);
1262}
1263
c65b1445
DG		 1264static int resp_sas_sf_m_pg(unsigned char * p, int pcontrol, int target)
1265{ /* SAS SSP mode page - short format for mode_sense */
1266 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
1267 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
1268
1269 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
1270 if (1 == pcontrol)
1271 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
1272 return sizeof(sas_sf_m_pg);
1273}
1274
1275
1276static int resp_sas_pcd_m_spg(unsigned char * p, int pcontrol, int target,
1277 int target_dev_id)
1278{ /* SAS phy control and discover mode page for mode_sense */
1279 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
1280 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
1281 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1282 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1283 0x2, 0, 0, 0, 0, 0, 0, 0,
1284 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1285 0, 0, 0, 0, 0, 0, 0, 0,
1286 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
1287 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1288 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1289 0x3, 0, 0, 0, 0, 0, 0, 0,
1290 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1291 0, 0, 0, 0, 0, 0, 0, 0,
1292 };
1293 int port_a, port_b;
1294
1295 port_a = target_dev_id + 1;
1296 port_b = port_a + 1;
1297 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
1298 p[20] = (port_a >> 24);
1299 p[21] = (port_a >> 16) & 0xff;
1300 p[22] = (port_a >> 8) & 0xff;
1301 p[23] = port_a & 0xff;
1302 p[48 + 20] = (port_b >> 24);
1303 p[48 + 21] = (port_b >> 16) & 0xff;
1304 p[48 + 22] = (port_b >> 8) & 0xff;
1305 p[48 + 23] = port_b & 0xff;
1306 if (1 == pcontrol)
1307 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
1308 return sizeof(sas_pcd_m_pg);
1309}
1310
1311static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol)
1312{ /* SAS SSP shared protocol specific port mode subpage */
1313 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
1314 0, 0, 0, 0, 0, 0, 0, 0,
1315 };
1316
1317 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
1318 if (1 == pcontrol)
1319 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
1320 return sizeof(sas_sha_m_pg);
1321}
1322
1da177e4
LT		 1323#define SDEBUG_MAX_MSENSE_SZ 256
1324
1325static int resp_mode_sense(struct scsi_cmnd * scp, int target,
1326 struct sdebug_dev_info * devip)
1327{
23183910
DG		 1328 unsigned char dbd, llbaa;
1329 int pcontrol, pcode, subpcode, bd_len;
1da177e4 1330 unsigned char dev_spec;
23183910 1331 int k, alloc_len, msense_6, offset, len, errsts, target_dev_id;
1da177e4
LT		 1332 unsigned char * ap;
1333 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
1334 unsigned char *cmd = (unsigned char *)scp->cmnd;
1335
c65b1445 1336 if ((errsts = check_readiness(scp, 1, devip)))
1da177e4 1337 return errsts;
23183910 1338 dbd = !!(cmd[1] & 0x8);
1da177e4
LT		 1339 pcontrol = (cmd[2] & 0xc0) >> 6;
1340 pcode = cmd[2] & 0x3f;
1341 subpcode = cmd[3];
1342 msense_6 = (MODE_SENSE == cmd[0]);
23183910
DG		 1343 llbaa = msense_6 ? 0 : !!(cmd[1] & 0x10);
1344 if ((0 == scsi_debug_ptype) && (0 == dbd))
1345 bd_len = llbaa ? 16 : 8;
1346 else
1347 bd_len = 0;
1da177e4
LT		 1348 alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]);
1349 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
1350 if (0x3 == pcontrol) { /* Saving values not supported */
1351 mk_sense_buffer(devip, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP,
1352 0);
1353 return check_condition_result;
1354 }
c65b1445
DG		 1355 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
1356 (devip->target * 1000) - 3;
23183910
DG		 1357 /* set DPOFUA bit for disks */
1358 if (0 == scsi_debug_ptype)
1359 dev_spec = (DEV_READONLY(target) ? 0x80 : 0x0) | 0x10;
1360 else
1361 dev_spec = 0x0;
1da177e4
LT		 1362 if (msense_6) {
1363 arr[2] = dev_spec;
23183910 1364 arr[3] = bd_len;
1da177e4
LT		 1365 offset = 4;
1366 } else {
1367 arr[3] = dev_spec;
23183910
DG		 1368 if (16 == bd_len)
1369 arr[4] = 0x1; /* set LONGLBA bit */
1370 arr[7] = bd_len; /* assume 255 or less */
1da177e4
LT		 1371 offset = 8;
1372 }
1373 ap = arr + offset;
28898873
FT		 1374 if ((bd_len > 0) && (!sdebug_capacity))
1375 sdebug_capacity = get_sdebug_capacity();
1376
23183910
DG		 1377 if (8 == bd_len) {
1378 if (sdebug_capacity > 0xfffffffe) {
1379 ap[0] = 0xff;
1380 ap[1] = 0xff;
1381 ap[2] = 0xff;
1382 ap[3] = 0xff;
1383 } else {
1384 ap[0] = (sdebug_capacity >> 24) & 0xff;
1385 ap[1] = (sdebug_capacity >> 16) & 0xff;
1386 ap[2] = (sdebug_capacity >> 8) & 0xff;
1387 ap[3] = sdebug_capacity & 0xff;
1388 }
597136ab
MP		 1389 ap[6] = (scsi_debug_sector_size >> 8) & 0xff;
1390 ap[7] = scsi_debug_sector_size & 0xff;
23183910
DG		 1391 offset += bd_len;
1392 ap = arr + offset;
1393 } else if (16 == bd_len) {
1394 unsigned long long capac = sdebug_capacity;
1395
1396 for (k = 0; k < 8; ++k, capac >>= 8)
1397 ap[7 - k] = capac & 0xff;
597136ab
MP		 1398 ap[12] = (scsi_debug_sector_size >> 24) & 0xff;
1399 ap[13] = (scsi_debug_sector_size >> 16) & 0xff;
1400 ap[14] = (scsi_debug_sector_size >> 8) & 0xff;
1401 ap[15] = scsi_debug_sector_size & 0xff;
23183910
DG		 1402 offset += bd_len;
1403 ap = arr + offset;
1404 }
1da177e4 1405
c65b1445
DG		 1406 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
1407 /* TODO: Control Extension page */
1da177e4
LT		 1408 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
1409 0);
1410 return check_condition_result;
1411 }
1412 switch (pcode) {
1413 case 0x1: /* Read-Write error recovery page, direct access */
1414 len = resp_err_recov_pg(ap, pcontrol, target);
1415 offset += len;
1416 break;
1417 case 0x2: /* Disconnect-Reconnect page, all devices */
1418 len = resp_disconnect_pg(ap, pcontrol, target);
1419 offset += len;
1420 break;
1421 case 0x3: /* Format device page, direct access */
1422 len = resp_format_pg(ap, pcontrol, target);
1423 offset += len;
1424 break;
1425 case 0x8: /* Caching page, direct access */
1426 len = resp_caching_pg(ap, pcontrol, target);
1427 offset += len;
1428 break;
1429 case 0xa: /* Control Mode page, all devices */
1430 len = resp_ctrl_m_pg(ap, pcontrol, target);
1431 offset += len;
1432 break;
c65b1445
DG		 1433 case 0x19: /* if spc==1 then sas phy, control+discover */
1434 if ((subpcode > 0x2) && (subpcode < 0xff)) {
1435 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1436 INVALID_FIELD_IN_CDB, 0);
1437 return check_condition_result;
1438 }
1439 len = 0;
1440 if ((0x0 == subpcode) || (0xff == subpcode))
1441 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
1442 if ((0x1 == subpcode) || (0xff == subpcode))
1443 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
1444 target_dev_id);
1445 if ((0x2 == subpcode) || (0xff == subpcode))
1446 len += resp_sas_sha_m_spg(ap + len, pcontrol);
1447 offset += len;
1448 break;
1da177e4
LT		 1449 case 0x1c: /* Informational Exceptions Mode page, all devices */
1450 len = resp_iec_m_pg(ap, pcontrol, target);
1451 offset += len;
1452 break;
1453 case 0x3f: /* Read all Mode pages */
c65b1445
DG		 1454 if ((0 == subpcode) || (0xff == subpcode)) {
1455 len = resp_err_recov_pg(ap, pcontrol, target);
1456 len += resp_disconnect_pg(ap + len, pcontrol, target);
1457 len += resp_format_pg(ap + len, pcontrol, target);
1458 len += resp_caching_pg(ap + len, pcontrol, target);
1459 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
1460 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
1461 if (0xff == subpcode) {
1462 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
1463 target, target_dev_id);
1464 len += resp_sas_sha_m_spg(ap + len, pcontrol);
1465 }
1466 len += resp_iec_m_pg(ap + len, pcontrol, target);
1467 } else {
1468 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1469 INVALID_FIELD_IN_CDB, 0);
1470 return check_condition_result;
1471 }
1da177e4
LT		 1472 offset += len;
1473 break;
1474 default:
1475 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
1476 0);
1477 return check_condition_result;
1478 }
1479 if (msense_6)
1480 arr[0] = offset - 1;
1481 else {
1482 arr[0] = ((offset - 2) >> 8) & 0xff;
1483 arr[1] = (offset - 2) & 0xff;
1484 }
1485 return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
1486}
1487
c65b1445
DG		 1488#define SDEBUG_MAX_MSELECT_SZ 512
1489
1490static int resp_mode_select(struct scsi_cmnd * scp, int mselect6,
1491 struct sdebug_dev_info * devip)
1492{
1493 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
1494 int param_len, res, errsts, mpage;
1495 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
1496 unsigned char *cmd = (unsigned char *)scp->cmnd;
1497
1498 if ((errsts = check_readiness(scp, 1, devip)))
1499 return errsts;
1500 memset(arr, 0, sizeof(arr));
1501 pf = cmd[1] & 0x10;
1502 sp = cmd[1] & 0x1;
1503 param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]);
1504 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
1505 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1506 INVALID_FIELD_IN_CDB, 0);
1507 return check_condition_result;
1508 }
1509 res = fetch_to_dev_buffer(scp, arr, param_len);
1510 if (-1 == res)
1511 return (DID_ERROR << 16);
1512 else if ((res < param_len) &&
1513 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
1514 printk(KERN_INFO "scsi_debug: mode_select: cdb indicated=%d, "
1515 " IO sent=%d bytes\n", param_len, res);
1516 md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2);
1517 bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]);
23183910 1518 if (md_len > 2) {
c65b1445
DG		 1519 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1520 INVALID_FIELD_IN_PARAM_LIST, 0);
1521 return check_condition_result;
1522 }
1523 off = bd_len + (mselect6 ? 4 : 8);
1524 mpage = arr[off] & 0x3f;
1525 ps = !!(arr[off] & 0x80);
1526 if (ps) {
1527 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1528 INVALID_FIELD_IN_PARAM_LIST, 0);
1529 return check_condition_result;
1530 }
1531 spf = !!(arr[off] & 0x40);
1532 pg_len = spf ? ((arr[off + 2] << 8) + arr[off + 3] + 4) :
1533 (arr[off + 1] + 2);
1534 if ((pg_len + off) > param_len) {
1535 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1536 PARAMETER_LIST_LENGTH_ERR, 0);
1537 return check_condition_result;
1538 }
1539 switch (mpage) {
1540 case 0xa: /* Control Mode page */
1541 if (ctrl_m_pg[1] == arr[off + 1]) {
1542 memcpy(ctrl_m_pg + 2, arr + off + 2,
1543 sizeof(ctrl_m_pg) - 2);
1544 scsi_debug_dsense = !!(ctrl_m_pg[2] & 0x4);
1545 return 0;
1546 }
1547 break;
1548 case 0x1c: /* Informational Exceptions Mode page */
1549 if (iec_m_pg[1] == arr[off + 1]) {
1550 memcpy(iec_m_pg + 2, arr + off + 2,
1551 sizeof(iec_m_pg) - 2);
1552 return 0;
1553 }
1554 break;
1555 default:
1556 break;
1557 }
1558 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1559 INVALID_FIELD_IN_PARAM_LIST, 0);
1560 return check_condition_result;
1561}
1562
1563static int resp_temp_l_pg(unsigned char * arr)
1564{
1565 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
1566 0x0, 0x1, 0x3, 0x2, 0x0, 65,
1567 };
1568
1569 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
1570 return sizeof(temp_l_pg);
1571}
1572
1573static int resp_ie_l_pg(unsigned char * arr)
1574{
1575 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
1576 };
1577
1578 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
1579 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
1580 arr[4] = THRESHOLD_EXCEEDED;
1581 arr[5] = 0xff;
1582 }
1583 return sizeof(ie_l_pg);
1584}
1585
1586#define SDEBUG_MAX_LSENSE_SZ 512
1587
1588static int resp_log_sense(struct scsi_cmnd * scp,
1589 struct sdebug_dev_info * devip)
1590{
23183910 1591 int ppc, sp, pcontrol, pcode, subpcode, alloc_len, errsts, len, n;
c65b1445
DG		 1592 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
1593 unsigned char *cmd = (unsigned char *)scp->cmnd;
1594
1595 if ((errsts = check_readiness(scp, 1, devip)))
1596 return errsts;
1597 memset(arr, 0, sizeof(arr));
1598 ppc = cmd[1] & 0x2;
1599 sp = cmd[1] & 0x1;
1600 if (ppc || sp) {
1601 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1602 INVALID_FIELD_IN_CDB, 0);
1603 return check_condition_result;
1604 }
1605 pcontrol = (cmd[2] & 0xc0) >> 6;
1606 pcode = cmd[2] & 0x3f;
23183910 1607 subpcode = cmd[3] & 0xff;
c65b1445
DG		 1608 alloc_len = (cmd[7] << 8) + cmd[8];
1609 arr[0] = pcode;
23183910
DG		 1610 if (0 == subpcode) {
1611 switch (pcode) {
1612 case 0x0: /* Supported log pages log page */
1613 n = 4;
1614 arr[n++] = 0x0; /* this page */
1615 arr[n++] = 0xd; /* Temperature */
1616 arr[n++] = 0x2f; /* Informational exceptions */
1617 arr[3] = n - 4;
1618 break;
1619 case 0xd: /* Temperature log page */
1620 arr[3] = resp_temp_l_pg(arr + 4);
1621 break;
1622 case 0x2f: /* Informational exceptions log page */
1623 arr[3] = resp_ie_l_pg(arr + 4);
1624 break;
1625 default:
1626 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1627 INVALID_FIELD_IN_CDB, 0);
1628 return check_condition_result;
1629 }
1630 } else if (0xff == subpcode) {
1631 arr[0] |= 0x40;
1632 arr[1] = subpcode;
1633 switch (pcode) {
1634 case 0x0: /* Supported log pages and subpages log page */
1635 n = 4;
1636 arr[n++] = 0x0;
1637 arr[n++] = 0x0; /* 0,0 page */
1638 arr[n++] = 0x0;
1639 arr[n++] = 0xff; /* this page */
1640 arr[n++] = 0xd;
1641 arr[n++] = 0x0; /* Temperature */
1642 arr[n++] = 0x2f;
1643 arr[n++] = 0x0; /* Informational exceptions */
1644 arr[3] = n - 4;
1645 break;
1646 case 0xd: /* Temperature subpages */
1647 n = 4;
1648 arr[n++] = 0xd;
1649 arr[n++] = 0x0; /* Temperature */
1650 arr[3] = n - 4;
1651 break;
1652 case 0x2f: /* Informational exceptions subpages */
1653 n = 4;
1654 arr[n++] = 0x2f;
1655 arr[n++] = 0x0; /* Informational exceptions */
1656 arr[3] = n - 4;
1657 break;
1658 default:
1659 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1660 INVALID_FIELD_IN_CDB, 0);
1661 return check_condition_result;
1662 }
1663 } else {
c65b1445
DG		 1664 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1665 INVALID_FIELD_IN_CDB, 0);
1666 return check_condition_result;
1667 }
1668 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
1669 return fill_from_dev_buffer(scp, arr,
1670 min(len, SDEBUG_MAX_INQ_ARR_SZ));
1671}
1672
19789100
FT		 1673static int check_device_access_params(struct sdebug_dev_info *devi,
1674 unsigned long long lba, unsigned int num)
1da177e4 1675{
c65b1445 1676 if (lba + num > sdebug_capacity) {
19789100 1677 mk_sense_buffer(devi, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE, 0);
1da177e4
LT		 1678 return check_condition_result;
1679 }
c65b1445
DG		 1680 /* transfer length excessive (tie in to block limits VPD page) */
1681 if (num > sdebug_store_sectors) {
19789100 1682 mk_sense_buffer(devi, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
c65b1445
DG		 1683 return check_condition_result;
1684 }
19789100
FT		 1685 return 0;
1686}
1687
a4517511 1688/* Returns number of bytes copied or -1 if error. */
19789100
FT		 1689static int do_device_access(struct scsi_cmnd *scmd,
1690 struct sdebug_dev_info *devi,
1691 unsigned long long lba, unsigned int num, int write)
1692{
1693 int ret;
a361cc00 1694 unsigned long long block, rest = 0;
a4517511
AM		 1695 struct scsi_data_buffer *sdb;
1696 enum dma_data_direction dir;
1697 size_t (*func)(struct scatterlist *, unsigned int, void *, size_t,
1698 off_t);
1699
1700 if (write) {
1701 sdb = scsi_out(scmd);
1702 dir = DMA_TO_DEVICE;
1703 func = sg_pcopy_to_buffer;
1704 } else {
1705 sdb = scsi_in(scmd);
1706 dir = DMA_FROM_DEVICE;
1707 func = sg_pcopy_from_buffer;
1708 }
19789100 1709
a4517511
AM		 1710 if (!sdb->length)
1711 return 0;
1712 if (!(scsi_bidi_cmnd(scmd) || scmd->sc_data_direction == dir))
1713 return -1;
19789100
FT		 1714
1715 block = do_div(lba, sdebug_store_sectors);
1716 if (block + num > sdebug_store_sectors)
1717 rest = block + num - sdebug_store_sectors;
1718
a4517511
AM		 1719 ret = func(sdb->table.sgl, sdb->table.nents,
1720 fake_storep + (block * scsi_debug_sector_size),
1721 (num - rest) * scsi_debug_sector_size, 0);
1722 if (ret != (num - rest) * scsi_debug_sector_size)
1723 return ret;
1724
1725 if (rest) {
1726 ret += func(sdb->table.sgl, sdb->table.nents,
1727 fake_storep, rest * scsi_debug_sector_size,
1728 (num - rest) * scsi_debug_sector_size);
1729 }
19789100
FT		 1730
1731 return ret;
1732}
1733
beb40ea4
AM		 1734static u16 dif_compute_csum(const void *buf, int len)
1735{
1736 u16 csum;
1737
1738 switch (scsi_debug_guard) {
1739 case 1:
1740 csum = ip_compute_csum(buf, len);
1741 break;
1742 case 0:
1743 csum = cpu_to_be16(crc_t10dif(buf, len));
1744 break;
1745 }
1746 return csum;
1747}
1748
1749static int dif_verify(struct sd_dif_tuple *sdt, const void *data,
1750 sector_t sector, u32 ei_lba)
1751{
1752 u16 csum = dif_compute_csum(data, scsi_debug_sector_size);
1753
1754 if (sdt->guard_tag != csum) {
1755 pr_err("%s: GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
1756 __func__,
1757 (unsigned long)sector,
1758 be16_to_cpu(sdt->guard_tag),
1759 be16_to_cpu(csum));
1760 return 0x01;
1761 }
1762 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION &&
1763 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
1764 pr_err("%s: REF check failed on sector %lu\n",
1765 __func__, (unsigned long)sector);
1766 return 0x03;
1767 }
1768 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
1769 be32_to_cpu(sdt->ref_tag) != ei_lba) {
1770 pr_err("%s: REF check failed on sector %lu\n",
1771 __func__, (unsigned long)sector);
1772 dif_errors++;
1773 return 0x03;
1774 }
1775 return 0;
1776}
1777
c6a44287 1778static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
395cef03 1779 unsigned int sectors, u32 ei_lba)
c6a44287
MP		 1780{
1781 unsigned int i, resid;
1782 struct scatterlist *psgl;
1783 struct sd_dif_tuple *sdt;
1784 sector_t sector;
1785 sector_t tmp_sec = start_sec;
1786 void *paddr;
1787
1788 start_sec = do_div(tmp_sec, sdebug_store_sectors);
1789
e18d8bea 1790 sdt = dif_storep + start_sec;
c6a44287
MP		 1791
1792 for (i = 0 ; i < sectors ; i++) {
beb40ea4 1793 int ret;
c6a44287
MP		 1794
1795 if (sdt[i].app_tag == 0xffff)
1796 continue;
1797
1798 sector = start_sec + i;
1799
beb40ea4
AM		 1800 ret = dif_verify(&sdt[i],
1801 fake_storep + sector * scsi_debug_sector_size,
1802 sector, ei_lba);
1803 if (ret) {
c6a44287 1804 dif_errors++;
beb40ea4 1805 return ret;
395cef03
MP		 1806 }
1807
1808 ei_lba++;
c6a44287
MP		 1809 }
1810
e18d8bea
AM		 1811 /* Bytes of protection data to copy into sgl */
1812 resid = sectors * sizeof(*dif_storep);
c6a44287
MP		 1813 sector = start_sec;
1814
1815 scsi_for_each_prot_sg(SCpnt, psgl, scsi_prot_sg_count(SCpnt), i) {
1816 int len = min(psgl->length, resid);
1817
77dfce07 1818 paddr = kmap_atomic(sg_page(psgl)) + psgl->offset;
e18d8bea 1819 memcpy(paddr, dif_storep + sector, len);
c6a44287 1820
e18d8bea 1821 sector += len / sizeof(*dif_storep);
c6a44287
MP		 1822 if (sector >= sdebug_store_sectors) {
1823 /* Force wrap */
1824 tmp_sec = sector;
1825 sector = do_div(tmp_sec, sdebug_store_sectors);
1826 }
1827 resid -= len;
77dfce07 1828 kunmap_atomic(paddr);
c6a44287
MP		 1829 }
1830
1831 dix_reads++;
1832
1833 return 0;
1834}
1835
19789100 1836static int resp_read(struct scsi_cmnd *SCpnt, unsigned long long lba,
395cef03
MP		 1837 unsigned int num, struct sdebug_dev_info *devip,
1838 u32 ei_lba)
19789100
FT		 1839{
1840 unsigned long iflags;
1841 int ret;
1842
1843 ret = check_device_access_params(devip, lba, num);
1844 if (ret)
1845 return ret;
1846
1da177e4 1847 if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) &&
32f7ef73 1848 (lba <= (OPT_MEDIUM_ERR_ADDR + OPT_MEDIUM_ERR_NUM - 1)) &&
c65b1445
DG		 1849 ((lba + num) > OPT_MEDIUM_ERR_ADDR)) {
1850 /* claim unrecoverable read error */
32f7ef73 1851 mk_sense_buffer(devip, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
c65b1445
DG		 1852 /* set info field and valid bit for fixed descriptor */
1853 if (0x70 == (devip->sense_buff[0] & 0x7f)) {
1854 devip->sense_buff[0] |= 0x80; /* Valid bit */
32f7ef73
DG		 1855 ret = (lba < OPT_MEDIUM_ERR_ADDR)
1856 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
c65b1445
DG		 1857 devip->sense_buff[3] = (ret >> 24) & 0xff;
1858 devip->sense_buff[4] = (ret >> 16) & 0xff;
1859 devip->sense_buff[5] = (ret >> 8) & 0xff;
1860 devip->sense_buff[6] = ret & 0xff;
1861 }
a87e3a67 1862 scsi_set_resid(SCpnt, scsi_bufflen(SCpnt));
1da177e4
LT		 1863 return check_condition_result;
1864 }
c6a44287
MP		 1865
1866 /* DIX + T10 DIF */
1867 if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
395cef03 1868 int prot_ret = prot_verify_read(SCpnt, lba, num, ei_lba);
c6a44287
MP		 1869
1870 if (prot_ret) {
1871 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, prot_ret);
1872 return illegal_condition_result;
1873 }
1874 }
1875
1da177e4 1876 read_lock_irqsave(&atomic_rw, iflags);
19789100 1877 ret = do_device_access(SCpnt, devip, lba, num, 0);
1da177e4 1878 read_unlock_irqrestore(&atomic_rw, iflags);
a4517511
AM		 1879 if (ret == -1)
1880 return DID_ERROR << 16;
1881
1882 scsi_in(SCpnt)->resid = scsi_bufflen(SCpnt) - ret;
1883
1884 return 0;
1da177e4
LT		 1885}
1886
c6a44287
MP		 1887void dump_sector(unsigned char *buf, int len)
1888{
1889 int i, j;
1890
1891 printk(KERN_ERR ">>> Sector Dump <<<\n");
1892
1893 for (i = 0 ; i < len ; i += 16) {
1894 printk(KERN_ERR "%04d: ", i);
1895
1896 for (j = 0 ; j < 16 ; j++) {
1897 unsigned char c = buf[i+j];
1898 if (c >= 0x20 && c < 0x7e)
1899 printk(" %c ", buf[i+j]);
1900 else
1901 printk("%02x ", buf[i+j]);
1902 }
1903
1904 printk("\n");
1905 }
1906}
1907
1908static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
395cef03 1909 unsigned int sectors, u32 ei_lba)
c6a44287
MP		 1910{
1911 int i, j, ret;
1912 struct sd_dif_tuple *sdt;
1913 struct scatterlist *dsgl = scsi_sglist(SCpnt);
1914 struct scatterlist *psgl = scsi_prot_sglist(SCpnt);
1915 void *daddr, *paddr;
1916 sector_t tmp_sec = start_sec;
1917 sector_t sector;
1918 int ppage_offset;
c6a44287
MP		 1919
1920 sector = do_div(tmp_sec, sdebug_store_sectors);
1921
c6a44287
MP		 1922 BUG_ON(scsi_sg_count(SCpnt) == 0);
1923 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
1924
c6a44287
MP		 1925 ppage_offset = 0;
1926
1927 /* For each data page */
1928 scsi_for_each_sg(SCpnt, dsgl, scsi_sg_count(SCpnt), i) {
77dfce07 1929 daddr = kmap_atomic(sg_page(dsgl)) + dsgl->offset;
fc3fc352 1930 paddr = kmap_atomic(sg_page(psgl)) + psgl->offset;
c6a44287
MP		 1931
1932 /* For each sector-sized chunk in data page */
518d9df8 1933 for (j = 0; j < dsgl->length; j += scsi_debug_sector_size) {
c6a44287
MP		 1934
1935 /* If we're at the end of the current
1936 * protection page advance to the next one
1937 */
1938 if (ppage_offset >= psgl->length) {
77dfce07 1939 kunmap_atomic(paddr);
c6a44287
MP		 1940 psgl = sg_next(psgl);
1941 BUG_ON(psgl == NULL);
77dfce07 1942 paddr = kmap_atomic(sg_page(psgl))
c6a44287
MP		 1943 + psgl->offset;
1944 ppage_offset = 0;
1945 }
1946
1947 sdt = paddr + ppage_offset;
1948
beb40ea4
AM		 1949 ret = dif_verify(sdt, daddr + j, start_sec, ei_lba);
1950 if (ret) {
518d9df8 1951 dump_sector(daddr + j, scsi_debug_sector_size);
395cef03
MP		 1952 goto out;
1953 }
1954
c6a44287
MP		 1955 /* Would be great to copy this in bigger
1956 * chunks. However, for the sake of
1957 * correctness we need to verify each sector
1958 * before writing it to "stable" storage
1959 */
e18d8bea 1960 memcpy(dif_storep + sector, sdt, sizeof(*sdt));
c6a44287
MP		 1961
1962 sector++;
1963
1964 if (sector == sdebug_store_sectors)
1965 sector = 0; /* Force wrap */
1966
1967 start_sec++;
395cef03 1968 ei_lba++;
c6a44287
MP		 1969 ppage_offset += sizeof(struct sd_dif_tuple);
1970 }
1971
fc3fc352 1972 kunmap_atomic(paddr);
77dfce07 1973 kunmap_atomic(daddr);
c6a44287
MP		 1974 }
1975
c6a44287
MP		 1976 dix_writes++;
1977
1978 return 0;
1979
1980out:
1981 dif_errors++;
77dfce07 1982 kunmap_atomic(paddr);
fc3fc352 1983 kunmap_atomic(daddr);
c6a44287
MP		 1984 return ret;
1985}
1986
b90ebc3d
AM		 1987static unsigned long lba_to_map_index(sector_t lba)
1988{
1989 if (scsi_debug_unmap_alignment) {
1990 lba += scsi_debug_unmap_granularity -
1991 scsi_debug_unmap_alignment;
1992 }
1993 do_div(lba, scsi_debug_unmap_granularity);
1994
1995 return lba;
1996}
1997
1998static sector_t map_index_to_lba(unsigned long index)
44d92694 1999{
b90ebc3d
AM		 2000 return index * scsi_debug_unmap_granularity -
2001 scsi_debug_unmap_alignment;
2002}
44d92694 2003
b90ebc3d
AM		 2004static unsigned int map_state(sector_t lba, unsigned int *num)
2005{
2006 sector_t end;
2007 unsigned int mapped;
2008 unsigned long index;
2009 unsigned long next;
44d92694 2010
b90ebc3d
AM		 2011 index = lba_to_map_index(lba);
2012 mapped = test_bit(index, map_storep);
44d92694
MP		 2013
2014 if (mapped)
b90ebc3d 2015 next = find_next_zero_bit(map_storep, map_size, index);
44d92694 2016 else
b90ebc3d 2017 next = find_next_bit(map_storep, map_size, index);
44d92694 2018
b90ebc3d 2019 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
44d92694
MP		 2020 *num = end - lba;
2021
2022 return mapped;
2023}
2024
2025static void map_region(sector_t lba, unsigned int len)
2026{
44d92694
MP		 2027 sector_t end = lba + len;
2028
44d92694 2029 while (lba < end) {
b90ebc3d 2030 unsigned long index = lba_to_map_index(lba);
44d92694 2031
b90ebc3d
AM		 2032 if (index < map_size)
2033 set_bit(index, map_storep);
44d92694 2034
b90ebc3d 2035 lba = map_index_to_lba(index + 1);
44d92694
MP		 2036 }
2037}
2038
2039static void unmap_region(sector_t lba, unsigned int len)
2040{
44d92694
MP		 2041 sector_t end = lba + len;
2042
44d92694 2043 while (lba < end) {
b90ebc3d 2044 unsigned long index = lba_to_map_index(lba);
44d92694 2045
b90ebc3d
AM		 2046 if (lba == map_index_to_lba(index) &&
2047 lba + scsi_debug_unmap_granularity <= end &&
2048 index < map_size) {
2049 clear_bit(index, map_storep);
2050 if (scsi_debug_lbprz) {
be1dd78d 2051 memset(fake_storep +
cc34a8e6
AM		 2052 lba * scsi_debug_sector_size, 0,
2053 scsi_debug_sector_size *
2054 scsi_debug_unmap_granularity);
b90ebc3d 2055 }
e9926b43
AM		 2056 if (dif_storep) {
2057 memset(dif_storep + lba, 0xff,
2058 sizeof(*dif_storep) *
2059 scsi_debug_unmap_granularity);
2060 }
be1dd78d 2061 }
b90ebc3d 2062 lba = map_index_to_lba(index + 1);
44d92694
MP		 2063 }
2064}
2065
19789100 2066static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba,
395cef03
MP		 2067 unsigned int num, struct sdebug_dev_info *devip,
2068 u32 ei_lba)
1da177e4
LT		 2069{
2070 unsigned long iflags;
19789100 2071 int ret;
1da177e4 2072
19789100
FT		 2073 ret = check_device_access_params(devip, lba, num);
2074 if (ret)
2075 return ret;
1da177e4 2076
c6a44287
MP		 2077 /* DIX + T10 DIF */
2078 if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
395cef03 2079 int prot_ret = prot_verify_write(SCpnt, lba, num, ei_lba);
c6a44287
MP		 2080
2081 if (prot_ret) {
2082 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, prot_ret);
2083 return illegal_condition_result;
2084 }
2085 }
2086
1da177e4 2087 write_lock_irqsave(&atomic_rw, iflags);
19789100 2088 ret = do_device_access(SCpnt, devip, lba, num, 1);
9ed8d3dc 2089 if (scsi_debug_lbp())
44d92694 2090 map_region(lba, num);
1da177e4 2091 write_unlock_irqrestore(&atomic_rw, iflags);
19789100 2092 if (-1 == ret)
1da177e4 2093 return (DID_ERROR << 16);
597136ab 2094 else if ((ret < (num * scsi_debug_sector_size)) &&
1da177e4 2095 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
c65b1445 2096 printk(KERN_INFO "scsi_debug: write: cdb indicated=%u, "
597136ab 2097 " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret);
44d92694
MP		 2098
2099 return 0;
2100}
2101
2102static int resp_write_same(struct scsi_cmnd *scmd, unsigned long long lba,
2103 unsigned int num, struct sdebug_dev_info *devip,
2104 u32 ei_lba, unsigned int unmap)
2105{
2106 unsigned long iflags;
2107 unsigned long long i;
2108 int ret;
2109
2110 ret = check_device_access_params(devip, lba, num);
2111 if (ret)
2112 return ret;
2113
5b94e232
MP		 2114 if (num > scsi_debug_write_same_length) {
2115 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
2116 0);
2117 return check_condition_result;
2118 }
2119
44d92694
MP		 2120 write_lock_irqsave(&atomic_rw, iflags);
2121
9ed8d3dc 2122 if (unmap && scsi_debug_lbp()) {
44d92694
MP		 2123 unmap_region(lba, num);
2124 goto out;
2125 }
2126
2127 /* Else fetch one logical block */
2128 ret = fetch_to_dev_buffer(scmd,
2129 fake_storep + (lba * scsi_debug_sector_size),
2130 scsi_debug_sector_size);
2131
2132 if (-1 == ret) {
2133 write_unlock_irqrestore(&atomic_rw, iflags);
2134 return (DID_ERROR << 16);
2135 } else if ((ret < (num * scsi_debug_sector_size)) &&
2136 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2137 printk(KERN_INFO "scsi_debug: write same: cdb indicated=%u, "
2138 " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret);
2139
2140 /* Copy first sector to remaining blocks */
2141 for (i = 1 ; i < num ; i++)
2142 memcpy(fake_storep + ((lba + i) * scsi_debug_sector_size),
2143 fake_storep + (lba * scsi_debug_sector_size),
2144 scsi_debug_sector_size);
2145
9ed8d3dc 2146 if (scsi_debug_lbp())
44d92694
MP		 2147 map_region(lba, num);
2148out:
2149 write_unlock_irqrestore(&atomic_rw, iflags);
2150
1da177e4
LT		 2151 return 0;
2152}
2153
44d92694
MP		 2154struct unmap_block_desc {
2155 __be64 lba;
2156 __be32 blocks;
2157 __be32 __reserved;
2158};
2159
2160static int resp_unmap(struct scsi_cmnd * scmd, struct sdebug_dev_info * devip)
2161{
2162 unsigned char *buf;
2163 struct unmap_block_desc *desc;
2164 unsigned int i, payload_len, descriptors;
2165 int ret;
2166
2167 ret = check_readiness(scmd, 1, devip);
2168 if (ret)
2169 return ret;
2170
2171 payload_len = get_unaligned_be16(&scmd->cmnd[7]);
2172 BUG_ON(scsi_bufflen(scmd) != payload_len);
2173
2174 descriptors = (payload_len - 8) / 16;
2175
2176 buf = kmalloc(scsi_bufflen(scmd), GFP_ATOMIC);
2177 if (!buf)
2178 return check_condition_result;
2179
2180 scsi_sg_copy_to_buffer(scmd, buf, scsi_bufflen(scmd));
2181
2182 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
2183 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
2184
2185 desc = (void *)&buf[8];
2186
2187 for (i = 0 ; i < descriptors ; i++) {
2188 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
2189 unsigned int num = get_unaligned_be32(&desc[i].blocks);
2190
2191 ret = check_device_access_params(devip, lba, num);
2192 if (ret)
2193 goto out;
2194
2195 unmap_region(lba, num);
2196 }
2197
2198 ret = 0;
2199
2200out:
2201 kfree(buf);
2202
2203 return ret;
2204}
2205
2206#define SDEBUG_GET_LBA_STATUS_LEN 32
2207
2208static int resp_get_lba_status(struct scsi_cmnd * scmd,
2209 struct sdebug_dev_info * devip)
2210{
2211 unsigned long long lba;
2212 unsigned int alloc_len, mapped, num;
2213 unsigned char arr[SDEBUG_GET_LBA_STATUS_LEN];
2214 int ret;
2215
2216 ret = check_readiness(scmd, 1, devip);
2217 if (ret)
2218 return ret;
2219
2220 lba = get_unaligned_be64(&scmd->cmnd[2]);
2221 alloc_len = get_unaligned_be32(&scmd->cmnd[10]);
2222
2223 if (alloc_len < 24)
2224 return 0;
2225
2226 ret = check_device_access_params(devip, lba, 1);
2227 if (ret)
2228 return ret;
2229
2230 mapped = map_state(lba, &num);
2231
2232 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
de13e965 2233 put_unaligned_be32(20, &arr[0]); /* Parameter Data Length */
44d92694
MP		 2234 put_unaligned_be64(lba, &arr[8]); /* LBA */
2235 put_unaligned_be32(num, &arr[16]); /* Number of blocks */
2236 arr[20] = !mapped; /* mapped = 0, unmapped = 1 */
2237
2238 return fill_from_dev_buffer(scmd, arr, SDEBUG_GET_LBA_STATUS_LEN);
2239}
2240
c65b1445 2241#define SDEBUG_RLUN_ARR_SZ 256
1da177e4
LT		 2242
2243static int resp_report_luns(struct scsi_cmnd * scp,
2244 struct sdebug_dev_info * devip)
2245{
2246 unsigned int alloc_len;
c65b1445 2247 int lun_cnt, i, upper, num, n, wlun, lun;
1da177e4
LT		 2248 unsigned char *cmd = (unsigned char *)scp->cmnd;
2249 int select_report = (int)cmd[2];
2250 struct scsi_lun *one_lun;
2251 unsigned char arr[SDEBUG_RLUN_ARR_SZ];
c65b1445 2252 unsigned char * max_addr;
1da177e4
LT		 2253
2254 alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
c65b1445 2255 if ((alloc_len < 4) || (select_report > 2)) {
1da177e4
LT		 2256 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
2257 0);
2258 return check_condition_result;
2259 }
2260 /* can produce response with up to 16k luns (lun 0 to lun 16383) */
2261 memset(arr, 0, SDEBUG_RLUN_ARR_SZ);
2262 lun_cnt = scsi_debug_max_luns;
c65b1445
DG		 2263 if (1 == select_report)
2264 lun_cnt = 0;
2265 else if (scsi_debug_no_lun_0 && (lun_cnt > 0))
2266 --lun_cnt;
2267 wlun = (select_report > 0) ? 1 : 0;
2268 num = lun_cnt + wlun;
2269 arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff;
2270 arr[3] = (sizeof(struct scsi_lun) * num) & 0xff;
2271 n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) /
2272 sizeof(struct scsi_lun)), num);
2273 if (n < num) {
2274 wlun = 0;
2275 lun_cnt = n;
2276 }
1da177e4 2277 one_lun = (struct scsi_lun *) &arr[8];
c65b1445
DG		 2278 max_addr = arr + SDEBUG_RLUN_ARR_SZ;
2279 for (i = 0, lun = (scsi_debug_no_lun_0 ? 1 : 0);
2280 ((i < lun_cnt) && ((unsigned char *)(one_lun + i) < max_addr));
2281 i++, lun++) {
2282 upper = (lun >> 8) & 0x3f;
1da177e4
LT		 2283 if (upper)
2284 one_lun[i].scsi_lun[0] =
2285 (upper | (SAM2_LUN_ADDRESS_METHOD << 6));
c65b1445
DG		 2286 one_lun[i].scsi_lun[1] = lun & 0xff;
2287 }
2288 if (wlun) {
2289 one_lun[i].scsi_lun[0] = (SAM2_WLUN_REPORT_LUNS >> 8) & 0xff;
2290 one_lun[i].scsi_lun[1] = SAM2_WLUN_REPORT_LUNS & 0xff;
2291 i++;
1da177e4 2292 }
c65b1445 2293 alloc_len = (unsigned char *)(one_lun + i) - arr;
1da177e4
LT		 2294 return fill_from_dev_buffer(scp, arr,
2295 min((int)alloc_len, SDEBUG_RLUN_ARR_SZ));
2296}
2297
c639d14e
FT		 2298static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
2299 unsigned int num, struct sdebug_dev_info *devip)
2300{
2301 int i, j, ret = -1;
2302 unsigned char *kaddr, *buf;
2303 unsigned int offset;
2304 struct scatterlist *sg;
2305 struct scsi_data_buffer *sdb = scsi_in(scp);
2306
2307 /* better not to use temporary buffer. */
2308 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
2309 if (!buf)
2310 return ret;
2311
21a61829 2312 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
c639d14e
FT		 2313
2314 offset = 0;
2315 for_each_sg(sdb->table.sgl, sg, sdb->table.nents, i) {
77dfce07 2316 kaddr = (unsigned char *)kmap_atomic(sg_page(sg));
c639d14e
FT		 2317 if (!kaddr)
2318 goto out;
2319
2320 for (j = 0; j < sg->length; j++)
2321 *(kaddr + sg->offset + j) ^= *(buf + offset + j);
2322
2323 offset += sg->length;
77dfce07 2324 kunmap_atomic(kaddr);
c639d14e
FT		 2325 }
2326 ret = 0;
2327out:
2328 kfree(buf);
2329
2330 return ret;
2331}
2332
1da177e4
LT		 2333/* When timer goes off this function is called. */
2334static void timer_intr_handler(unsigned long indx)
2335{
2336 struct sdebug_queued_cmd * sqcp;
2337 unsigned long iflags;
2338
78d4e5a0 2339 if (indx >= scsi_debug_max_queue) {
1da177e4
LT		 2340 printk(KERN_ERR "scsi_debug:timer_intr_handler: indx too "
2341 "large\n");
2342 return;
2343 }
2344 spin_lock_irqsave(&queued_arr_lock, iflags);
2345 sqcp = &queued_arr[(int)indx];
2346 if (! sqcp->in_use) {
2347 printk(KERN_ERR "scsi_debug:timer_intr_handler: Unexpected "
2348 "interrupt\n");
2349 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2350 return;
2351 }
2352 sqcp->in_use = 0;
2353 if (sqcp->done_funct) {
2354 sqcp->a_cmnd->result = sqcp->scsi_result;
2355 sqcp->done_funct(sqcp->a_cmnd); /* callback to mid level */
2356 }
2357 sqcp->done_funct = NULL;
2358 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2359}
2360
1da177e4 2361
8dea0d02
FT		 2362static struct sdebug_dev_info *
2363sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags)
5cb2fc06
FT		 2364{
2365 struct sdebug_dev_info *devip;
2366
2367 devip = kzalloc(sizeof(*devip), flags);
2368 if (devip) {
2369 devip->sdbg_host = sdbg_host;
2370 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
2371 }
2372 return devip;
2373}
2374
1da177e4
LT		 2375static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev)
2376{
2377 struct sdebug_host_info * sdbg_host;
2378 struct sdebug_dev_info * open_devip = NULL;
2379 struct sdebug_dev_info * devip =
2380 (struct sdebug_dev_info *)sdev->hostdata;
2381
2382 if (devip)
2383 return devip;
d1e4c9c5
FT		 2384 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
2385 if (!sdbg_host) {
1da177e4
LT		 2386 printk(KERN_ERR "Host info NULL\n");
2387 return NULL;
2388 }
2389 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
2390 if ((devip->used) && (devip->channel == sdev->channel) &&
2391 (devip->target == sdev->id) &&
2392 (devip->lun == sdev->lun))
2393 return devip;
2394 else {
2395 if ((!devip->used) && (!open_devip))
2396 open_devip = devip;
2397 }
2398 }
5cb2fc06
FT		 2399 if (!open_devip) { /* try and make a new one */
2400 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
2401 if (!open_devip) {
1da177e4 2402 printk(KERN_ERR "%s: out of memory at line %d\n",
cadbd4a5 2403 __func__, __LINE__);
1da177e4
LT		 2404 return NULL;
2405 }
1da177e4 2406 }
a75869d1
FT		 2407
2408 open_devip->channel = sdev->channel;
2409 open_devip->target = sdev->id;
2410 open_devip->lun = sdev->lun;
2411 open_devip->sdbg_host = sdbg_host;
2412 open_devip->reset = 1;
2413 open_devip->used = 1;
2414 memset(open_devip->sense_buff, 0, SDEBUG_SENSE_LEN);
2415 if (scsi_debug_dsense)
2416 open_devip->sense_buff[0] = 0x72;
2417 else {
2418 open_devip->sense_buff[0] = 0x70;
2419 open_devip->sense_buff[7] = 0xa;
2420 }
2421 if (sdev->lun == SAM2_WLUN_REPORT_LUNS)
2422 open_devip->wlun = SAM2_WLUN_REPORT_LUNS & 0xff;
2423
2424 return open_devip;
1da177e4
LT		 2425}
2426
8dea0d02 2427static int scsi_debug_slave_alloc(struct scsi_device *sdp)
1da177e4 2428{
8dea0d02
FT		 2429 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2430 printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %u>\n",
2431 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
75ad23bc 2432 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue);
8dea0d02
FT		 2433 return 0;
2434}
1da177e4 2435
8dea0d02
FT		 2436static int scsi_debug_slave_configure(struct scsi_device *sdp)
2437{
2438 struct sdebug_dev_info *devip;
a34c4e98 2439
8dea0d02
FT		 2440 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2441 printk(KERN_INFO "scsi_debug: slave_configure <%u %u %u %u>\n",
2442 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
2443 if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN)
2444 sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN;
2445 devip = devInfoReg(sdp);
2446 if (NULL == devip)
2447 return 1; /* no resources, will be marked offline */
2448 sdp->hostdata = devip;
2449 if (sdp->host->cmd_per_lun)
2450 scsi_adjust_queue_depth(sdp, SDEBUG_TAGGED_QUEUING,
2451 sdp->host->cmd_per_lun);
2452 blk_queue_max_segment_size(sdp->request_queue, 256 * 1024);
78d4e5a0
DG		 2453 if (scsi_debug_no_uld)
2454 sdp->no_uld_attach = 1;
8dea0d02
FT		 2455 return 0;
2456}
2457
2458static void scsi_debug_slave_destroy(struct scsi_device *sdp)
2459{
2460 struct sdebug_dev_info *devip =
2461 (struct sdebug_dev_info *)sdp->hostdata;
a34c4e98 2462
1da177e4 2463 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
8dea0d02
FT		 2464 printk(KERN_INFO "scsi_debug: slave_destroy <%u %u %u %u>\n",
2465 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
2466 if (devip) {
25985edc 2467 /* make this slot available for re-use */
8dea0d02
FT		 2468 devip->used = 0;
2469 sdp->hostdata = NULL;
2470 }
2471}
2472
2473/* Returns 1 if found 'cmnd' and deleted its timer. else returns 0 */
2474static int stop_queued_cmnd(struct scsi_cmnd *cmnd)
2475{
2476 unsigned long iflags;
2477 int k;
2478 struct sdebug_queued_cmd *sqcp;
2479
2480 spin_lock_irqsave(&queued_arr_lock, iflags);
78d4e5a0 2481 for (k = 0; k < scsi_debug_max_queue; ++k) {
8dea0d02
FT		 2482 sqcp = &queued_arr[k];
2483 if (sqcp->in_use && (cmnd == sqcp->a_cmnd)) {
2484 del_timer_sync(&sqcp->cmnd_timer);
2485 sqcp->in_use = 0;
2486 sqcp->a_cmnd = NULL;
2487 break;
2488 }
2489 }
2490 spin_unlock_irqrestore(&queued_arr_lock, iflags);
78d4e5a0 2491 return (k < scsi_debug_max_queue) ? 1 : 0;
8dea0d02
FT		 2492}
2493
2494/* Deletes (stops) timers of all queued commands */
2495static void stop_all_queued(void)
2496{
2497 unsigned long iflags;
2498 int k;
2499 struct sdebug_queued_cmd *sqcp;
2500
2501 spin_lock_irqsave(&queued_arr_lock, iflags);
78d4e5a0 2502 for (k = 0; k < scsi_debug_max_queue; ++k) {
8dea0d02
FT		 2503 sqcp = &queued_arr[k];
2504 if (sqcp->in_use && sqcp->a_cmnd) {
2505 del_timer_sync(&sqcp->cmnd_timer);
2506 sqcp->in_use = 0;
2507 sqcp->a_cmnd = NULL;
2508 }
2509 }
2510 spin_unlock_irqrestore(&queued_arr_lock, iflags);
1da177e4
LT		 2511}
2512
2513static int scsi_debug_abort(struct scsi_cmnd * SCpnt)
2514{
2515 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2516 printk(KERN_INFO "scsi_debug: abort\n");
2517 ++num_aborts;
2518 stop_queued_cmnd(SCpnt);
2519 return SUCCESS;
2520}
2521
2522static int scsi_debug_biosparam(struct scsi_device *sdev,
2523 struct block_device * bdev, sector_t capacity, int *info)
2524{
2525 int res;
2526 unsigned char *buf;
2527
2528 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2529 printk(KERN_INFO "scsi_debug: biosparam\n");
2530 buf = scsi_bios_ptable(bdev);
2531 if (buf) {
2532 res = scsi_partsize(buf, capacity,
2533 &info[2], &info[0], &info[1]);
2534 kfree(buf);
2535 if (! res)
2536 return res;
2537 }
2538 info[0] = sdebug_heads;
2539 info[1] = sdebug_sectors_per;
2540 info[2] = sdebug_cylinders_per;
2541 return 0;
2542}
2543
2544static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
2545{
2546 struct sdebug_dev_info * devip;
2547
2548 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2549 printk(KERN_INFO "scsi_debug: device_reset\n");
2550 ++num_dev_resets;
2551 if (SCpnt) {
2552 devip = devInfoReg(SCpnt->device);
2553 if (devip)
2554 devip->reset = 1;
2555 }
2556 return SUCCESS;
2557}
2558
2559static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
2560{
2561 struct sdebug_host_info *sdbg_host;
2562 struct sdebug_dev_info * dev_info;
2563 struct scsi_device * sdp;
2564 struct Scsi_Host * hp;
2565
2566 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2567 printk(KERN_INFO "scsi_debug: bus_reset\n");
2568 ++num_bus_resets;
2569 if (SCpnt && ((sdp = SCpnt->device)) && ((hp = sdp->host))) {
d1e4c9c5 2570 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
1da177e4
LT		 2571 if (sdbg_host) {
2572 list_for_each_entry(dev_info,
2573 &sdbg_host->dev_info_list,
2574 dev_list)
2575 dev_info->reset = 1;
2576 }
2577 }
2578 return SUCCESS;
2579}
2580
2581static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
2582{
2583 struct sdebug_host_info * sdbg_host;
2584 struct sdebug_dev_info * dev_info;
2585
2586 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2587 printk(KERN_INFO "scsi_debug: host_reset\n");
2588 ++num_host_resets;
2589 spin_lock(&sdebug_host_list_lock);
2590 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
2591 list_for_each_entry(dev_info, &sdbg_host->dev_info_list,
2592 dev_list)
2593 dev_info->reset = 1;
2594 }
2595 spin_unlock(&sdebug_host_list_lock);
2596 stop_all_queued();
2597 return SUCCESS;
2598}
2599
1da177e4
LT		 2600/* Initializes timers in queued array */
2601static void __init init_all_queued(void)
2602{
2603 unsigned long iflags;
2604 int k;
2605 struct sdebug_queued_cmd * sqcp;
2606
2607 spin_lock_irqsave(&queued_arr_lock, iflags);
78d4e5a0 2608 for (k = 0; k < scsi_debug_max_queue; ++k) {
1da177e4
LT		 2609 sqcp = &queued_arr[k];
2610 init_timer(&sqcp->cmnd_timer);
2611 sqcp->in_use = 0;
2612 sqcp->a_cmnd = NULL;
2613 }
2614 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2615}
2616
f58b0efb 2617static void __init sdebug_build_parts(unsigned char *ramp,
5f2578e5 2618 unsigned long store_size)
1da177e4
LT		 2619{
2620 struct partition * pp;
2621 int starts[SDEBUG_MAX_PARTS + 2];
2622 int sectors_per_part, num_sectors, k;
2623 int heads_by_sects, start_sec, end_sec;
2624
2625 /* assume partition table already zeroed */
f58b0efb 2626 if ((scsi_debug_num_parts < 1) || (store_size < 1048576))
1da177e4
LT		 2627 return;
2628 if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) {
2629 scsi_debug_num_parts = SDEBUG_MAX_PARTS;
2630 printk(KERN_WARNING "scsi_debug:build_parts: reducing "
2631 "partitions to %d\n", SDEBUG_MAX_PARTS);
2632 }
c65b1445 2633 num_sectors = (int)sdebug_store_sectors;
1da177e4
LT		 2634 sectors_per_part = (num_sectors - sdebug_sectors_per)
2635 / scsi_debug_num_parts;
2636 heads_by_sects = sdebug_heads * sdebug_sectors_per;
2637 starts[0] = sdebug_sectors_per;
2638 for (k = 1; k < scsi_debug_num_parts; ++k)
2639 starts[k] = ((k * sectors_per_part) / heads_by_sects)
2640 * heads_by_sects;
2641 starts[scsi_debug_num_parts] = num_sectors;
2642 starts[scsi_debug_num_parts + 1] = 0;
2643
2644 ramp[510] = 0x55; /* magic partition markings */
2645 ramp[511] = 0xAA;
2646 pp = (struct partition *)(ramp + 0x1be);
2647 for (k = 0; starts[k + 1]; ++k, ++pp) {
2648 start_sec = starts[k];
2649 end_sec = starts[k + 1] - 1;
2650 pp->boot_ind = 0;
2651
2652 pp->cyl = start_sec / heads_by_sects;
2653 pp->head = (start_sec - (pp->cyl * heads_by_sects))
2654 / sdebug_sectors_per;
2655 pp->sector = (start_sec % sdebug_sectors_per) + 1;
2656
2657 pp->end_cyl = end_sec / heads_by_sects;
2658 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
2659 / sdebug_sectors_per;
2660 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
2661
2662 pp->start_sect = start_sec;
2663 pp->nr_sects = end_sec - start_sec + 1;
2664 pp->sys_ind = 0x83; /* plain Linux partition */
2665 }
2666}
2667
2668static int schedule_resp(struct scsi_cmnd * cmnd,
2669 struct sdebug_dev_info * devip,
2670 done_funct_t done, int scsi_result, int delta_jiff)
2671{
2672 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmnd) {
2673 if (scsi_result) {
2674 struct scsi_device * sdp = cmnd->device;
2675
c65b1445
DG		 2676 printk(KERN_INFO "scsi_debug: <%u %u %u %u> "
2677 "non-zero result=0x%x\n", sdp->host->host_no,
2678 sdp->channel, sdp->id, sdp->lun, scsi_result);
1da177e4
LT		 2679 }
2680 }
2681 if (cmnd && devip) {
2682 /* simulate autosense by this driver */
2683 if (SAM_STAT_CHECK_CONDITION == (scsi_result & 0xff))
2684 memcpy(cmnd->sense_buffer, devip->sense_buff,
2685 (SCSI_SENSE_BUFFERSIZE > SDEBUG_SENSE_LEN) ?
2686 SDEBUG_SENSE_LEN : SCSI_SENSE_BUFFERSIZE);
2687 }
2688 if (delta_jiff <= 0) {
2689 if (cmnd)
2690 cmnd->result = scsi_result;
2691 if (done)
2692 done(cmnd);
2693 return 0;
2694 } else {
2695 unsigned long iflags;
2696 int k;
2697 struct sdebug_queued_cmd * sqcp = NULL;
2698
2699 spin_lock_irqsave(&queued_arr_lock, iflags);
78d4e5a0 2700 for (k = 0; k < scsi_debug_max_queue; ++k) {
1da177e4
LT		 2701 sqcp = &queued_arr[k];
2702 if (! sqcp->in_use)
2703 break;
2704 }
78d4e5a0 2705 if (k >= scsi_debug_max_queue) {
1da177e4
LT		 2706 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2707 printk(KERN_WARNING "scsi_debug: can_queue exceeded\n");
2708 return 1; /* report busy to mid level */
2709 }
2710 sqcp->in_use = 1;
2711 sqcp->a_cmnd = cmnd;
2712 sqcp->scsi_result = scsi_result;
2713 sqcp->done_funct = done;
2714 sqcp->cmnd_timer.function = timer_intr_handler;
2715 sqcp->cmnd_timer.data = k;
2716 sqcp->cmnd_timer.expires = jiffies + delta_jiff;
2717 add_timer(&sqcp->cmnd_timer);
2718 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2719 if (cmnd)
2720 cmnd->result = 0;
2721 return 0;
2722 }
2723}
23183910
DG		 2724/* Note: The following macros create attribute files in the
2725 /sys/module/scsi_debug/parameters directory. Unfortunately this
2726 driver is unaware of a change and cannot trigger auxiliary actions
2727 as it can when the corresponding attribute in the
2728 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
2729 */
c65b1445 2730module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR);
5b94e232 2731module_param_named(ato, scsi_debug_ato, int, S_IRUGO);
c65b1445
DG		 2732module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR);
2733module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO);
5b94e232
MP		 2734module_param_named(dif, scsi_debug_dif, int, S_IRUGO);
2735module_param_named(dix, scsi_debug_dix, int, S_IRUGO);
c65b1445
DG		 2736module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR);
2737module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR);
23183910 2738module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR);
5b94e232
MP		 2739module_param_named(guard, scsi_debug_guard, int, S_IRUGO);
2740module_param_named(lbpu, scsi_debug_lbpu, int, S_IRUGO);
2741module_param_named(lbpws, scsi_debug_lbpws, int, S_IRUGO);
2742module_param_named(lbpws10, scsi_debug_lbpws10, int, S_IRUGO);
be1dd78d 2743module_param_named(lbprz, scsi_debug_lbprz, int, S_IRUGO);
5b94e232 2744module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO);
c65b1445 2745module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR);
78d4e5a0 2746module_param_named(max_queue, scsi_debug_max_queue, int, S_IRUGO | S_IWUSR);
c65b1445 2747module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR);
78d4e5a0 2748module_param_named(no_uld, scsi_debug_no_uld, int, S_IRUGO);
c65b1445
DG		 2749module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO);
2750module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR);
5b94e232 2751module_param_named(opt_blks, scsi_debug_opt_blks, int, S_IRUGO);
c65b1445 2752module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR);
5b94e232 2753module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO);
c65b1445 2754module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR);
d986788b 2755module_param_named(removable, scsi_debug_removable, bool, S_IRUGO | S_IWUSR);
c65b1445 2756module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO);
597136ab 2757module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO);
5b94e232
MP		 2758module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO);
2759module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO);
44d92694
MP		 2760module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO);
2761module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, int, S_IRUGO);
5b94e232
MP		 2762module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR);
2763module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int,
2764 S_IRUGO | S_IWUSR);
2765module_param_named(write_same_length, scsi_debug_write_same_length, int,
2766 S_IRUGO | S_IWUSR);
1da177e4
LT		 2767
2768MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
2769MODULE_DESCRIPTION("SCSI debug adapter driver");
2770MODULE_LICENSE("GPL");
2771MODULE_VERSION(SCSI_DEBUG_VERSION);
2772
2773MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
5b94e232 2774MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
1da177e4 2775MODULE_PARM_DESC(delay, "# of jiffies to delay response(def=1)");
c65b1445 2776MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs(def=8)");
5b94e232
MP		 2777MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
2778MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
c65b1445 2779MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
beb87c33 2780MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
23183910 2781MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
5b94e232
MP		 2782MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
2783MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
2784MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
2785MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
be1dd78d 2786MODULE_PARM_DESC(lbprz, "unmapped blocks return 0 on read (def=1)");
5b94e232 2787MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
c65b1445 2788MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
78d4e5a0 2789MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to 255(def))");
c65b1445 2790MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
78d4e5a0 2791MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
1da177e4 2792MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
c65b1445 2793MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
5b94e232 2794MODULE_PARM_DESC(opt_blks, "optimal transfer length in block (def=64)");
6f3cbf55 2795MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
5b94e232 2796MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
1da177e4 2797MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
d986788b 2798MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
1da177e4 2799MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])");
ea61fca5 2800MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
5b94e232
MP		 2801MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
2802MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
6014759c
MP		 2803MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
2804MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
5b94e232
MP		 2805MODULE_PARM_DESC(virtual_gb, "virtual gigabyte size (def=0 -> use dev_size_mb)");
2806MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
2807MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
1da177e4
LT		 2808
2809static char sdebug_info[256];
2810
2811static const char * scsi_debug_info(struct Scsi_Host * shp)
2812{
2813 sprintf(sdebug_info, "scsi_debug, version %s [%s], "
2814 "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION,
2815 scsi_debug_version_date, scsi_debug_dev_size_mb,
2816 scsi_debug_opts);
2817 return sdebug_info;
2818}
2819
2820/* scsi_debug_proc_info
2821 * Used if the driver currently has no own support for /proc/scsi
2822 */
c8ed555a 2823static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer, int length)
1da177e4 2824{
c8ed555a
AV		 2825 char arr[16];
2826 int opts;
2827 int minLen = length > 15 ? 15 : length;
1da177e4 2828
c8ed555a
AV		 2829 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
2830 return -EACCES;
2831 memcpy(arr, buffer, minLen);
2832 arr[minLen] = '\0';
2833 if (1 != sscanf(arr, "%d", &opts))
2834 return -EINVAL;
2835 scsi_debug_opts = opts;
2836 if (scsi_debug_every_nth != 0)
2837 scsi_debug_cmnd_count = 0;
2838 return length;
2839}
1da177e4 2840
c8ed555a
AV		 2841static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
2842{
2843 seq_printf(m, "scsi_debug adapter driver, version "
1da177e4
LT		 2844 "%s [%s]\n"
2845 "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, "
2846 "every_nth=%d(curr:%d)\n"
2847 "delay=%d, max_luns=%d, scsi_level=%d\n"
2848 "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n"
2849 "number of aborts=%d, device_reset=%d, bus_resets=%d, "
c6a44287 2850 "host_resets=%d\ndix_reads=%d dix_writes=%d dif_errors=%d\n",
1da177e4
LT		 2851 SCSI_DEBUG_VERSION, scsi_debug_version_date, scsi_debug_num_tgts,
2852 scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth,
2853 scsi_debug_cmnd_count, scsi_debug_delay,
2854 scsi_debug_max_luns, scsi_debug_scsi_level,
597136ab
MP		 2855 scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads,
2856 sdebug_sectors_per, num_aborts, num_dev_resets, num_bus_resets,
c6a44287 2857 num_host_resets, dix_reads, dix_writes, dif_errors);
c8ed555a 2858 return 0;
1da177e4
LT		 2859}
2860
2861static ssize_t sdebug_delay_show(struct device_driver * ddp, char * buf)
2862{
2863 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay);
2864}
2865
2866static ssize_t sdebug_delay_store(struct device_driver * ddp,
2867 const char * buf, size_t count)
2868{
2869 int delay;
2870 char work[20];
2871
2872 if (1 == sscanf(buf, "%10s", work)) {
2873 if ((1 == sscanf(work, "%d", &delay)) && (delay >= 0)) {
2874 scsi_debug_delay = delay;
2875 return count;
2876 }
2877 }
2878 return -EINVAL;
2879}
2880DRIVER_ATTR(delay, S_IRUGO | S_IWUSR, sdebug_delay_show,
2881 sdebug_delay_store);
2882
2883static ssize_t sdebug_opts_show(struct device_driver * ddp, char * buf)
2884{
2885 return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts);
2886}
2887
2888static ssize_t sdebug_opts_store(struct device_driver * ddp,
2889 const char * buf, size_t count)
2890{
2891 int opts;
2892 char work[20];
2893
2894 if (1 == sscanf(buf, "%10s", work)) {
2895 if (0 == strnicmp(work,"0x", 2)) {
2896 if (1 == sscanf(&work[2], "%x", &opts))
2897 goto opts_done;
2898 } else {
2899 if (1 == sscanf(work, "%d", &opts))
2900 goto opts_done;
2901 }
2902 }
2903 return -EINVAL;
2904opts_done:
2905 scsi_debug_opts = opts;
2906 scsi_debug_cmnd_count = 0;
2907 return count;
2908}
2909DRIVER_ATTR(opts, S_IRUGO | S_IWUSR, sdebug_opts_show,
2910 sdebug_opts_store);
2911
2912static ssize_t sdebug_ptype_show(struct device_driver * ddp, char * buf)
2913{
2914 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype);
2915}
2916static ssize_t sdebug_ptype_store(struct device_driver * ddp,
2917 const char * buf, size_t count)
2918{
2919 int n;
2920
2921 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2922 scsi_debug_ptype = n;
2923 return count;
2924 }
2925 return -EINVAL;
2926}
2927DRIVER_ATTR(ptype, S_IRUGO | S_IWUSR, sdebug_ptype_show, sdebug_ptype_store);
2928
2929static ssize_t sdebug_dsense_show(struct device_driver * ddp, char * buf)
2930{
2931 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense);
2932}
2933static ssize_t sdebug_dsense_store(struct device_driver * ddp,
2934 const char * buf, size_t count)
2935{
2936 int n;
2937
2938 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2939 scsi_debug_dsense = n;
2940 return count;
2941 }
2942 return -EINVAL;
2943}
2944DRIVER_ATTR(dsense, S_IRUGO | S_IWUSR, sdebug_dsense_show,
2945 sdebug_dsense_store);
2946
23183910
DG		 2947static ssize_t sdebug_fake_rw_show(struct device_driver * ddp, char * buf)
2948{
2949 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw);
2950}
2951static ssize_t sdebug_fake_rw_store(struct device_driver * ddp,
2952 const char * buf, size_t count)
2953{
2954 int n;
2955
2956 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2957 scsi_debug_fake_rw = n;
2958 return count;
2959 }
2960 return -EINVAL;
2961}
2962DRIVER_ATTR(fake_rw, S_IRUGO | S_IWUSR, sdebug_fake_rw_show,
2963 sdebug_fake_rw_store);
2964
c65b1445
DG		 2965static ssize_t sdebug_no_lun_0_show(struct device_driver * ddp, char * buf)
2966{
2967 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0);
2968}
2969static ssize_t sdebug_no_lun_0_store(struct device_driver * ddp,
2970 const char * buf, size_t count)
2971{
2972 int n;
2973
2974 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2975 scsi_debug_no_lun_0 = n;
2976 return count;
2977 }
2978 return -EINVAL;
2979}
2980DRIVER_ATTR(no_lun_0, S_IRUGO | S_IWUSR, sdebug_no_lun_0_show,
2981 sdebug_no_lun_0_store);
2982
1da177e4
LT		 2983static ssize_t sdebug_num_tgts_show(struct device_driver * ddp, char * buf)
2984{
2985 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts);
2986}
2987static ssize_t sdebug_num_tgts_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_num_tgts = n;
2994 sdebug_max_tgts_luns();
2995 return count;
2996 }
2997 return -EINVAL;
2998}
2999DRIVER_ATTR(num_tgts, S_IRUGO | S_IWUSR, sdebug_num_tgts_show,
3000 sdebug_num_tgts_store);
3001
3002static ssize_t sdebug_dev_size_mb_show(struct device_driver * ddp, char * buf)
3003{
3004 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb);
3005}
3006DRIVER_ATTR(dev_size_mb, S_IRUGO, sdebug_dev_size_mb_show, NULL);
3007
3008static ssize_t sdebug_num_parts_show(struct device_driver * ddp, char * buf)
3009{
3010 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts);
3011}
3012DRIVER_ATTR(num_parts, S_IRUGO, sdebug_num_parts_show, NULL);
3013
3014static ssize_t sdebug_every_nth_show(struct device_driver * ddp, char * buf)
3015{
3016 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth);
3017}
3018static ssize_t sdebug_every_nth_store(struct device_driver * ddp,
3019 const char * buf, size_t count)
3020{
3021 int nth;
3022
3023 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
3024 scsi_debug_every_nth = nth;
3025 scsi_debug_cmnd_count = 0;
3026 return count;
3027 }
3028 return -EINVAL;
3029}
3030DRIVER_ATTR(every_nth, S_IRUGO | S_IWUSR, sdebug_every_nth_show,
3031 sdebug_every_nth_store);
3032
3033static ssize_t sdebug_max_luns_show(struct device_driver * ddp, char * buf)
3034{
3035 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns);
3036}
3037static ssize_t sdebug_max_luns_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_max_luns = n;
3044 sdebug_max_tgts_luns();
3045 return count;
3046 }
3047 return -EINVAL;
3048}
3049DRIVER_ATTR(max_luns, S_IRUGO | S_IWUSR, sdebug_max_luns_show,
3050 sdebug_max_luns_store);
3051
78d4e5a0
DG		 3052static ssize_t sdebug_max_queue_show(struct device_driver * ddp, char * buf)
3053{
3054 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_queue);
3055}
3056static ssize_t sdebug_max_queue_store(struct device_driver * ddp,
3057 const char * buf, size_t count)
3058{
3059 int n;
3060
3061 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
3062 (n <= SCSI_DEBUG_CANQUEUE)) {
3063 scsi_debug_max_queue = n;
3064 return count;
3065 }
3066 return -EINVAL;
3067}
3068DRIVER_ATTR(max_queue, S_IRUGO | S_IWUSR, sdebug_max_queue_show,
3069 sdebug_max_queue_store);
3070
3071static ssize_t sdebug_no_uld_show(struct device_driver * ddp, char * buf)
3072{
3073 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_uld);
3074}
3075DRIVER_ATTR(no_uld, S_IRUGO, sdebug_no_uld_show, NULL);
3076
1da177e4
LT		 3077static ssize_t sdebug_scsi_level_show(struct device_driver * ddp, char * buf)
3078{
3079 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level);
3080}
3081DRIVER_ATTR(scsi_level, S_IRUGO, sdebug_scsi_level_show, NULL);
3082
c65b1445
DG		 3083static ssize_t sdebug_virtual_gb_show(struct device_driver * ddp, char * buf)
3084{
3085 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb);
3086}
3087static ssize_t sdebug_virtual_gb_store(struct device_driver * ddp,
3088 const char * buf, size_t count)
3089{
3090 int n;
3091
3092 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3093 scsi_debug_virtual_gb = n;
28898873
FT		 3094
3095 sdebug_capacity = get_sdebug_capacity();
3096
c65b1445
DG		 3097 return count;
3098 }
3099 return -EINVAL;
3100}
3101DRIVER_ATTR(virtual_gb, S_IRUGO | S_IWUSR, sdebug_virtual_gb_show,
3102 sdebug_virtual_gb_store);
3103
1da177e4
LT		 3104static ssize_t sdebug_add_host_show(struct device_driver * ddp, char * buf)
3105{
3106 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host);
3107}
3108
3109static ssize_t sdebug_add_host_store(struct device_driver * ddp,
3110 const char * buf, size_t count)
3111{
f3df41cf 3112 int delta_hosts;
1da177e4 3113
f3df41cf 3114 if (sscanf(buf, "%d", &delta_hosts) != 1)
1da177e4 3115 return -EINVAL;
1da177e4
LT		 3116 if (delta_hosts > 0) {
3117 do {
3118 sdebug_add_adapter();
3119 } while (--delta_hosts);
3120 } else if (delta_hosts < 0) {
3121 do {
3122 sdebug_remove_adapter();
3123 } while (++delta_hosts);
3124 }
3125 return count;
3126}
f3df41cf 3127DRIVER_ATTR(add_host, S_IRUGO | S_IWUSR, sdebug_add_host_show,
1da177e4
LT		 3128 sdebug_add_host_store);
3129
23183910
DG		 3130static ssize_t sdebug_vpd_use_hostno_show(struct device_driver * ddp,
3131 char * buf)
3132{
3133 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_vpd_use_hostno);
3134}
3135static ssize_t sdebug_vpd_use_hostno_store(struct device_driver * ddp,
3136 const char * buf, size_t count)
3137{
3138 int n;
3139
3140 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3141 scsi_debug_vpd_use_hostno = n;
3142 return count;
3143 }
3144 return -EINVAL;
3145}
3146DRIVER_ATTR(vpd_use_hostno, S_IRUGO | S_IWUSR, sdebug_vpd_use_hostno_show,
3147 sdebug_vpd_use_hostno_store);
3148
597136ab
MP		 3149static ssize_t sdebug_sector_size_show(struct device_driver * ddp, char * buf)
3150{
3151 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size);
3152}
3153DRIVER_ATTR(sector_size, S_IRUGO, sdebug_sector_size_show, NULL);
3154
c6a44287
MP		 3155static ssize_t sdebug_dix_show(struct device_driver *ddp, char *buf)
3156{
3157 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix);
3158}
3159DRIVER_ATTR(dix, S_IRUGO, sdebug_dix_show, NULL);
3160
3161static ssize_t sdebug_dif_show(struct device_driver *ddp, char *buf)
3162{
3163 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif);
3164}
3165DRIVER_ATTR(dif, S_IRUGO, sdebug_dif_show, NULL);
3166
3167static ssize_t sdebug_guard_show(struct device_driver *ddp, char *buf)
3168{
3169 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_guard);
3170}
3171DRIVER_ATTR(guard, S_IRUGO, sdebug_guard_show, NULL);
3172
3173static ssize_t sdebug_ato_show(struct device_driver *ddp, char *buf)
3174{
3175 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato);
3176}
3177DRIVER_ATTR(ato, S_IRUGO, sdebug_ato_show, NULL);
3178
44d92694
MP		 3179static ssize_t sdebug_map_show(struct device_driver *ddp, char *buf)
3180{
3181 ssize_t count;
3182
5b94e232 3183 if (!scsi_debug_lbp())
44d92694
MP		 3184 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
3185 sdebug_store_sectors);
3186
3187 count = bitmap_scnlistprintf(buf, PAGE_SIZE, map_storep, map_size);
3188
3189 buf[count++] = '\n';
3190 buf[count++] = 0;
3191
3192 return count;
3193}
3194DRIVER_ATTR(map, S_IRUGO, sdebug_map_show, NULL);
3195
d986788b
MP		 3196static ssize_t sdebug_removable_show(struct device_driver *ddp,
3197 char *buf)
3198{
3199 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_removable ? 1 : 0);
3200}
3201static ssize_t sdebug_removable_store(struct device_driver *ddp,
3202 const char *buf, size_t count)
3203{
3204 int n;
3205
3206 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3207 scsi_debug_removable = (n > 0);
3208 return count;
3209 }
3210 return -EINVAL;
3211}
3212DRIVER_ATTR(removable, S_IRUGO | S_IWUSR, sdebug_removable_show,
3213 sdebug_removable_store);
3214
c6a44287 3215
23183910
DG		 3216/* Note: The following function creates attribute files in the
3217 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
3218 files (over those found in the /sys/module/scsi_debug/parameters
3219 directory) is that auxiliary actions can be triggered when an attribute
3220 is changed. For example see: sdebug_add_host_store() above.
3221 */
6ecaff7f 3222static int do_create_driverfs_files(void)
1da177e4 3223{
6ecaff7f
RD		 3224 int ret;
3225
3226 ret = driver_create_file(&sdebug_driverfs_driver, &driver_attr_add_host);
3227 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_delay);
3228 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb);
3229 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dsense);
3230 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_every_nth);
23183910 3231 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_fake_rw);
6ecaff7f 3232 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_luns);
78d4e5a0 3233 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_queue);
23183910 3234 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_no_lun_0);
78d4e5a0 3235 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_no_uld);
6ecaff7f 3236 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_parts);
23183910 3237 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_tgts);
6ecaff7f
RD		 3238 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ptype);
3239 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_opts);
d986788b 3240 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_removable);
6ecaff7f 3241 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_scsi_level);
23183910
DG		 3242 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb);
3243 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno);
597136ab 3244 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_sector_size);
c6a44287
MP		 3245 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dix);
3246 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dif);
3247 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_guard);
3248 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ato);
44d92694 3249 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_map);
6ecaff7f 3250 return ret;
1da177e4
LT		 3251}
3252
3253static void do_remove_driverfs_files(void)
3254{
44d92694 3255 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_map);
c6a44287
MP		 3256 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ato);
3257 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_guard);
3258 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dif);
3259 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dix);
597136ab 3260 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_sector_size);
23183910
DG		 3261 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno);
3262 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb);
1da177e4
LT		 3263 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_scsi_level);
3264 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_opts);
3265 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ptype);
d986788b 3266 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_removable);
1da177e4 3267 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_tgts);
23183910 3268 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_parts);
78d4e5a0 3269 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_no_uld);
23183910 3270 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_no_lun_0);
78d4e5a0 3271 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_queue);
1da177e4 3272 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_luns);
23183910 3273 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_fake_rw);
1da177e4
LT		 3274 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_every_nth);
3275 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dsense);
3276 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb);
3277 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_delay);
3278 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_add_host);
3279}
3280
9b906779 3281struct device *pseudo_primary;
8dea0d02 3282
1da177e4
LT		 3283static int __init scsi_debug_init(void)
3284{
5f2578e5 3285 unsigned long sz;
1da177e4
LT		 3286 int host_to_add;
3287 int k;
6ecaff7f 3288 int ret;
1da177e4 3289
597136ab
MP		 3290 switch (scsi_debug_sector_size) {
3291 case 512:
3292 case 1024:
3293 case 2048:
3294 case 4096:
3295 break;
3296 default:
c6a44287 3297 printk(KERN_ERR "scsi_debug_init: invalid sector_size %d\n",
597136ab
MP		 3298 scsi_debug_sector_size);
3299 return -EINVAL;
3300 }
3301
c6a44287
MP		 3302 switch (scsi_debug_dif) {
3303
3304 case SD_DIF_TYPE0_PROTECTION:
3305 case SD_DIF_TYPE1_PROTECTION:
395cef03 3306 case SD_DIF_TYPE2_PROTECTION:
c6a44287
MP		 3307 case SD_DIF_TYPE3_PROTECTION:
3308 break;
3309
3310 default:
395cef03 3311 printk(KERN_ERR "scsi_debug_init: dif must be 0, 1, 2 or 3\n");
c6a44287
MP		 3312 return -EINVAL;
3313 }
3314
3315 if (scsi_debug_guard > 1) {
3316 printk(KERN_ERR "scsi_debug_init: guard must be 0 or 1\n");
3317 return -EINVAL;
3318 }
3319
3320 if (scsi_debug_ato > 1) {
3321 printk(KERN_ERR "scsi_debug_init: ato must be 0 or 1\n");
3322 return -EINVAL;
3323 }
3324
ea61fca5
MP		 3325 if (scsi_debug_physblk_exp > 15) {
3326 printk(KERN_ERR "scsi_debug_init: invalid physblk_exp %u\n",
3327 scsi_debug_physblk_exp);
3328 return -EINVAL;
3329 }
3330
3331 if (scsi_debug_lowest_aligned > 0x3fff) {
3332 printk(KERN_ERR "scsi_debug_init: lowest_aligned too big: %u\n",
3333 scsi_debug_lowest_aligned);
3334 return -EINVAL;
3335 }
3336
1da177e4
LT		 3337 if (scsi_debug_dev_size_mb < 1)
3338 scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
5f2578e5 3339 sz = (unsigned long)scsi_debug_dev_size_mb * 1048576;
597136ab 3340 sdebug_store_sectors = sz / scsi_debug_sector_size;
28898873 3341 sdebug_capacity = get_sdebug_capacity();
1da177e4
LT		 3342
3343 /* play around with geometry, don't waste too much on track 0 */
3344 sdebug_heads = 8;
3345 sdebug_sectors_per = 32;
3346 if (scsi_debug_dev_size_mb >= 16)
3347 sdebug_heads = 32;
3348 else if (scsi_debug_dev_size_mb >= 256)
3349 sdebug_heads = 64;
3350 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
3351 (sdebug_sectors_per * sdebug_heads);
3352 if (sdebug_cylinders_per >= 1024) {
3353 /* other LLDs do this; implies >= 1GB ram disk ... */
3354 sdebug_heads = 255;
3355 sdebug_sectors_per = 63;
3356 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
3357 (sdebug_sectors_per * sdebug_heads);
3358 }
3359
1da177e4
LT		 3360 fake_storep = vmalloc(sz);
3361 if (NULL == fake_storep) {
3362 printk(KERN_ERR "scsi_debug_init: out of memory, 1\n");
3363 return -ENOMEM;
3364 }
3365 memset(fake_storep, 0, sz);
3366 if (scsi_debug_num_parts > 0)
f58b0efb 3367 sdebug_build_parts(fake_storep, sz);
1da177e4 3368
7cb69d03 3369 if (scsi_debug_dix) {
c6a44287
MP		 3370 int dif_size;
3371
3372 dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple);
3373 dif_storep = vmalloc(dif_size);
3374
3375 printk(KERN_ERR "scsi_debug_init: dif_storep %u bytes @ %p\n",
3376 dif_size, dif_storep);
3377
3378 if (dif_storep == NULL) {
3379 printk(KERN_ERR "scsi_debug_init: out of mem. (DIX)\n");
3380 ret = -ENOMEM;
3381 goto free_vm;
3382 }
3383
3384 memset(dif_storep, 0xff, dif_size);
3385 }
3386
5b94e232
MP		 3387 /* Logical Block Provisioning */
3388 if (scsi_debug_lbp()) {
6014759c
MP		 3389 scsi_debug_unmap_max_blocks =
3390 clamp(scsi_debug_unmap_max_blocks, 0U, 0xffffffffU);
3391
3392 scsi_debug_unmap_max_desc =
3393 clamp(scsi_debug_unmap_max_desc, 0U, 256U);
3394
3395 scsi_debug_unmap_granularity =
3396 clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU);
3397
3398 if (scsi_debug_unmap_alignment &&
ac17078a
AM		 3399 scsi_debug_unmap_granularity <=
3400 scsi_debug_unmap_alignment) {
44d92694 3401 printk(KERN_ERR
ac17078a 3402 "%s: ERR: unmap_granularity <= unmap_alignment\n",
44d92694
MP		 3403 __func__);
3404 return -EINVAL;
3405 }
3406
b90ebc3d
AM		 3407 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
3408 map_storep = vmalloc(BITS_TO_LONGS(map_size) * sizeof(long));
44d92694
MP		 3409
3410 printk(KERN_INFO "scsi_debug_init: %lu provisioning blocks\n",
3411 map_size);
3412
3413 if (map_storep == NULL) {
3414 printk(KERN_ERR "scsi_debug_init: out of mem. (MAP)\n");
3415 ret = -ENOMEM;
3416 goto free_vm;
3417 }
3418
b90ebc3d 3419 bitmap_zero(map_storep, map_size);
44d92694
MP		 3420
3421 /* Map first 1KB for partition table */
3422 if (scsi_debug_num_parts)
3423 map_region(0, 2);
3424 }
3425
9b906779
NB		 3426 pseudo_primary = root_device_register("pseudo_0");
3427 if (IS_ERR(pseudo_primary)) {
3428 printk(KERN_WARNING "scsi_debug: root_device_register() error\n");
3429 ret = PTR_ERR(pseudo_primary);
6ecaff7f
RD		 3430 goto free_vm;
3431 }
3432 ret = bus_register(&pseudo_lld_bus);
3433 if (ret < 0) {
3434 printk(KERN_WARNING "scsi_debug: bus_register error: %d\n",
3435 ret);
3436 goto dev_unreg;
3437 }
3438 ret = driver_register(&sdebug_driverfs_driver);
3439 if (ret < 0) {
3440 printk(KERN_WARNING "scsi_debug: driver_register error: %d\n",
3441 ret);
3442 goto bus_unreg;
3443 }
3444 ret = do_create_driverfs_files();
3445 if (ret < 0) {
3446 printk(KERN_WARNING "scsi_debug: driver_create_file error: %d\n",
3447 ret);
3448 goto del_files;
3449 }
1da177e4 3450
6ecaff7f 3451 init_all_queued();
1da177e4 3452
1da177e4
LT		 3453 host_to_add = scsi_debug_add_host;
3454 scsi_debug_add_host = 0;
3455
3456 for (k = 0; k < host_to_add; k++) {
3457 if (sdebug_add_adapter()) {
3458 printk(KERN_ERR "scsi_debug_init: "
3459 "sdebug_add_adapter failed k=%d\n", k);
3460 break;
3461 }
3462 }
3463
3464 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
3465 printk(KERN_INFO "scsi_debug_init: built %d host(s)\n",
3466 scsi_debug_add_host);
3467 }
3468 return 0;
6ecaff7f
RD		 3469
3470del_files:
3471 do_remove_driverfs_files();
3472 driver_unregister(&sdebug_driverfs_driver);
3473bus_unreg:
3474 bus_unregister(&pseudo_lld_bus);
3475dev_unreg:
9b906779 3476 root_device_unregister(pseudo_primary);
6ecaff7f 3477free_vm:
44d92694
MP		 3478 if (map_storep)
3479 vfree(map_storep);
c6a44287
MP		 3480 if (dif_storep)
3481 vfree(dif_storep);
6ecaff7f
RD		 3482 vfree(fake_storep);
3483
3484 return ret;
1da177e4
LT		 3485}
3486
3487static void __exit scsi_debug_exit(void)
3488{
3489 int k = scsi_debug_add_host;
3490
3491 stop_all_queued();
3492 for (; k; k--)
3493 sdebug_remove_adapter();
3494 do_remove_driverfs_files();
3495 driver_unregister(&sdebug_driverfs_driver);
3496 bus_unregister(&pseudo_lld_bus);
9b906779 3497 root_device_unregister(pseudo_primary);
1da177e4 3498
c6a44287
MP		 3499 if (dif_storep)
3500 vfree(dif_storep);
3501
1da177e4
LT		 3502 vfree(fake_storep);
3503}
3504
3505device_initcall(scsi_debug_init);
3506module_exit(scsi_debug_exit);
3507
1da177e4
LT		 3508static void sdebug_release_adapter(struct device * dev)
3509{
3510 struct sdebug_host_info *sdbg_host;
3511
3512 sdbg_host = to_sdebug_host(dev);
3513 kfree(sdbg_host);
3514}
3515
3516static int sdebug_add_adapter(void)
3517{
3518 int k, devs_per_host;
3519 int error = 0;
3520 struct sdebug_host_info *sdbg_host;
8b40228f 3521 struct sdebug_dev_info *sdbg_devinfo, *tmp;
1da177e4 3522
c65b1445 3523 sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL);
1da177e4
LT		 3524 if (NULL == sdbg_host) {
3525 printk(KERN_ERR "%s: out of memory at line %d\n",
cadbd4a5 3526 __func__, __LINE__);
1da177e4
LT		 3527 return -ENOMEM;
3528 }
3529
1da177e4
LT		 3530 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
3531
3532 devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns;
3533 for (k = 0; k < devs_per_host; k++) {
5cb2fc06
FT		 3534 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
3535 if (!sdbg_devinfo) {
1da177e4 3536 printk(KERN_ERR "%s: out of memory at line %d\n",
cadbd4a5 3537 __func__, __LINE__);
1da177e4
LT		 3538 error = -ENOMEM;
3539 goto clean;
3540 }
1da177e4
LT		 3541 }
3542
3543 spin_lock(&sdebug_host_list_lock);
3544 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
3545 spin_unlock(&sdebug_host_list_lock);
3546
3547 sdbg_host->dev.bus = &pseudo_lld_bus;
9b906779 3548 sdbg_host->dev.parent = pseudo_primary;
1da177e4 3549 sdbg_host->dev.release = &sdebug_release_adapter;
71610f55 3550 dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host);
1da177e4
LT		 3551
3552 error = device_register(&sdbg_host->dev);
3553
3554 if (error)
3555 goto clean;
3556
3557 ++scsi_debug_add_host;
3558 return error;
3559
3560clean:
8b40228f
FT		 3561 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
3562 dev_list) {
1da177e4
LT		 3563 list_del(&sdbg_devinfo->dev_list);
3564 kfree(sdbg_devinfo);
3565 }
3566
3567 kfree(sdbg_host);
3568 return error;
3569}
3570
3571static void sdebug_remove_adapter(void)
3572{
3573 struct sdebug_host_info * sdbg_host = NULL;
3574
3575 spin_lock(&sdebug_host_list_lock);
3576 if (!list_empty(&sdebug_host_list)) {
3577 sdbg_host = list_entry(sdebug_host_list.prev,
3578 struct sdebug_host_info, host_list);
3579 list_del(&sdbg_host->host_list);
3580 }
3581 spin_unlock(&sdebug_host_list_lock);
3582
3583 if (!sdbg_host)
3584 return;
3585
3586 device_unregister(&sdbg_host->dev);
3587 --scsi_debug_add_host;
3588}
3589
639db475 3590static
f281233d 3591int scsi_debug_queuecommand_lck(struct scsi_cmnd *SCpnt, done_funct_t done)
639db475
FT		 3592{
3593 unsigned char *cmd = (unsigned char *) SCpnt->cmnd;
3594 int len, k;
3595 unsigned int num;
3596 unsigned long long lba;
395cef03 3597 u32 ei_lba;
639db475
FT		 3598 int errsts = 0;
3599 int target = SCpnt->device->id;
3600 struct sdebug_dev_info *devip = NULL;
3601 int inj_recovered = 0;
3602 int inj_transport = 0;
c6a44287
MP		 3603 int inj_dif = 0;
3604 int inj_dix = 0;
639db475 3605 int delay_override = 0;
44d92694 3606 int unmap = 0;
639db475
FT		 3607
3608 scsi_set_resid(SCpnt, 0);
3609 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmd) {
3610 printk(KERN_INFO "scsi_debug: cmd ");
3611 for (k = 0, len = SCpnt->cmd_len; k < len; ++k)
3612 printk("%02x ", (int)cmd[k]);
3613 printk("\n");
3614 }
3615
3616 if (target == SCpnt->device->host->hostt->this_id) {
3617 printk(KERN_INFO "scsi_debug: initiator's id used as "
3618 "target!\n");
3619 return schedule_resp(SCpnt, NULL, done,
3620 DID_NO_CONNECT << 16, 0);
3621 }
3622
3623 if ((SCpnt->device->lun >= scsi_debug_max_luns) &&
3624 (SCpnt->device->lun != SAM2_WLUN_REPORT_LUNS))
3625 return schedule_resp(SCpnt, NULL, done,
3626 DID_NO_CONNECT << 16, 0);
3627 devip = devInfoReg(SCpnt->device);
3628 if (NULL == devip)
3629 return schedule_resp(SCpnt, NULL, done,
3630 DID_NO_CONNECT << 16, 0);
3631
3632 if ((scsi_debug_every_nth != 0) &&
3633 (++scsi_debug_cmnd_count >= abs(scsi_debug_every_nth))) {
3634 scsi_debug_cmnd_count = 0;
3635 if (scsi_debug_every_nth < -1)
3636 scsi_debug_every_nth = -1;
3637 if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts)
3638 return 0; /* ignore command causing timeout */
18a4d0a2
MP		 3639 else if (SCSI_DEBUG_OPT_MAC_TIMEOUT & scsi_debug_opts &&
3640 scsi_medium_access_command(SCpnt))
3641 return 0; /* time out reads and writes */
639db475
FT		 3642 else if (SCSI_DEBUG_OPT_RECOVERED_ERR & scsi_debug_opts)
3643 inj_recovered = 1; /* to reads and writes below */
3644 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & scsi_debug_opts)
3645 inj_transport = 1; /* to reads and writes below */
c6a44287
MP		 3646 else if (SCSI_DEBUG_OPT_DIF_ERR & scsi_debug_opts)
3647 inj_dif = 1; /* to reads and writes below */
3648 else if (SCSI_DEBUG_OPT_DIX_ERR & scsi_debug_opts)
3649 inj_dix = 1; /* to reads and writes below */
639db475
FT		 3650 }
3651
3652 if (devip->wlun) {
3653 switch (*cmd) {
3654 case INQUIRY:
3655 case REQUEST_SENSE:
3656 case TEST_UNIT_READY:
3657 case REPORT_LUNS:
3658 break; /* only allowable wlun commands */
3659 default:
3660 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3661 printk(KERN_INFO "scsi_debug: Opcode: 0x%x "
3662 "not supported for wlun\n", *cmd);
3663 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3664 INVALID_OPCODE, 0);
3665 errsts = check_condition_result;
3666 return schedule_resp(SCpnt, devip, done, errsts,
3667 0);
3668 }
3669 }
3670
3671 switch (*cmd) {
3672 case INQUIRY: /* mandatory, ignore unit attention */
3673 delay_override = 1;
3674 errsts = resp_inquiry(SCpnt, target, devip);
3675 break;
3676 case REQUEST_SENSE: /* mandatory, ignore unit attention */
3677 delay_override = 1;
3678 errsts = resp_requests(SCpnt, devip);
3679 break;
3680 case REZERO_UNIT: /* actually this is REWIND for SSC */
3681 case START_STOP:
3682 errsts = resp_start_stop(SCpnt, devip);
3683 break;
3684 case ALLOW_MEDIUM_REMOVAL:
3685 errsts = check_readiness(SCpnt, 1, devip);
3686 if (errsts)
3687 break;
3688 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3689 printk(KERN_INFO "scsi_debug: Medium removal %s\n",
3690 cmd[4] ? "inhibited" : "enabled");
3691 break;
3692 case SEND_DIAGNOSTIC: /* mandatory */
3693 errsts = check_readiness(SCpnt, 1, devip);
3694 break;
3695 case TEST_UNIT_READY: /* mandatory */
3696 delay_override = 1;
3697 errsts = check_readiness(SCpnt, 0, devip);
3698 break;
3699 case RESERVE:
3700 errsts = check_readiness(SCpnt, 1, devip);
3701 break;
3702 case RESERVE_10:
3703 errsts = check_readiness(SCpnt, 1, devip);
3704 break;
3705 case RELEASE:
3706 errsts = check_readiness(SCpnt, 1, devip);
3707 break;
3708 case RELEASE_10:
3709 errsts = check_readiness(SCpnt, 1, devip);
3710 break;
3711 case READ_CAPACITY:
3712 errsts = resp_readcap(SCpnt, devip);
3713 break;
3714 case SERVICE_ACTION_IN:
44d92694
MP		 3715 if (cmd[1] == SAI_READ_CAPACITY_16)
3716 errsts = resp_readcap16(SCpnt, devip);
3717 else if (cmd[1] == SAI_GET_LBA_STATUS) {
3718
5b94e232 3719 if (scsi_debug_lbp() == 0) {
44d92694
MP		 3720 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3721 INVALID_COMMAND_OPCODE, 0);
3722 errsts = check_condition_result;
3723 } else
3724 errsts = resp_get_lba_status(SCpnt, devip);
3725 } else {
639db475
FT		 3726 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3727 INVALID_OPCODE, 0);
3728 errsts = check_condition_result;
639db475 3729 }
639db475
FT		 3730 break;
3731 case MAINTENANCE_IN:
3732 if (MI_REPORT_TARGET_PGS != cmd[1]) {
3733 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3734 INVALID_OPCODE, 0);
3735 errsts = check_condition_result;
3736 break;
3737 }
3738 errsts = resp_report_tgtpgs(SCpnt, devip);
3739 break;
3740 case READ_16:
3741 case READ_12:
3742 case READ_10:
395cef03
MP		 3743 /* READ{10,12,16} and DIF Type 2 are natural enemies */
3744 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
3745 cmd[1] & 0xe0) {
3746 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3747 INVALID_COMMAND_OPCODE, 0);
3748 errsts = check_condition_result;
3749 break;
3750 }
3751
3752 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
3753 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
3754 (cmd[1] & 0xe0) == 0)
3755 printk(KERN_ERR "Unprotected RD/WR to DIF device\n");
3756
3757 /* fall through */
639db475 3758 case READ_6:
395cef03 3759read:
639db475
FT		 3760 errsts = check_readiness(SCpnt, 0, devip);
3761 if (errsts)
3762 break;
3763 if (scsi_debug_fake_rw)
3764 break;
395cef03
MP		 3765 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3766 errsts = resp_read(SCpnt, lba, num, devip, ei_lba);
639db475
FT		 3767 if (inj_recovered && (0 == errsts)) {
3768 mk_sense_buffer(devip, RECOVERED_ERROR,
3769 THRESHOLD_EXCEEDED, 0);
3770 errsts = check_condition_result;
3771 } else if (inj_transport && (0 == errsts)) {
3772 mk_sense_buffer(devip, ABORTED_COMMAND,
3773 TRANSPORT_PROBLEM, ACK_NAK_TO);
3774 errsts = check_condition_result;
c6a44287
MP		 3775 } else if (inj_dif && (0 == errsts)) {
3776 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1);
3777 errsts = illegal_condition_result;
3778 } else if (inj_dix && (0 == errsts)) {
3779 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1);
3780 errsts = illegal_condition_result;
639db475
FT		 3781 }
3782 break;
3783 case REPORT_LUNS: /* mandatory, ignore unit attention */
3784 delay_override = 1;
3785 errsts = resp_report_luns(SCpnt, devip);
3786 break;
3787 case VERIFY: /* 10 byte SBC-2 command */
3788 errsts = check_readiness(SCpnt, 0, devip);
3789 break;
3790 case WRITE_16:
3791 case WRITE_12:
3792 case WRITE_10:
395cef03
MP		 3793 /* WRITE{10,12,16} and DIF Type 2 are natural enemies */
3794 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
3795 cmd[1] & 0xe0) {
3796 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3797 INVALID_COMMAND_OPCODE, 0);
3798 errsts = check_condition_result;
3799 break;
3800 }
3801
3802 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
3803 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
3804 (cmd[1] & 0xe0) == 0)
3805 printk(KERN_ERR "Unprotected RD/WR to DIF device\n");
3806
3807 /* fall through */
639db475 3808 case WRITE_6:
395cef03 3809write:
639db475
FT		 3810 errsts = check_readiness(SCpnt, 0, devip);
3811 if (errsts)
3812 break;
3813 if (scsi_debug_fake_rw)
3814 break;
395cef03
MP		 3815 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3816 errsts = resp_write(SCpnt, lba, num, devip, ei_lba);
639db475
FT		 3817 if (inj_recovered && (0 == errsts)) {
3818 mk_sense_buffer(devip, RECOVERED_ERROR,
3819 THRESHOLD_EXCEEDED, 0);
3820 errsts = check_condition_result;
c6a44287
MP		 3821 } else if (inj_dif && (0 == errsts)) {
3822 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1);
3823 errsts = illegal_condition_result;
3824 } else if (inj_dix && (0 == errsts)) {
3825 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1);
3826 errsts = illegal_condition_result;
639db475
FT		 3827 }
3828 break;
44d92694 3829 case WRITE_SAME_16:
5b94e232 3830 case WRITE_SAME:
6014759c 3831 if (cmd[1] & 0x8) {
5b94e232
MP		 3832 if ((*cmd == WRITE_SAME_16 && scsi_debug_lbpws == 0) ||
3833 (*cmd == WRITE_SAME && scsi_debug_lbpws10 == 0)) {
6014759c
MP		 3834 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3835 INVALID_FIELD_IN_CDB, 0);
3836 errsts = check_condition_result;
3837 } else
3838 unmap = 1;
3839 }
3840 if (errsts)
3841 break;
44d92694
MP		 3842 errsts = check_readiness(SCpnt, 0, devip);
3843 if (errsts)
3844 break;
3845 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3846 errsts = resp_write_same(SCpnt, lba, num, devip, ei_lba, unmap);
3847 break;
3848 case UNMAP:
3849 errsts = check_readiness(SCpnt, 0, devip);
3850 if (errsts)
3851 break;
3852
5b94e232 3853 if (scsi_debug_unmap_max_desc == 0 || scsi_debug_lbpu == 0) {
44d92694
MP		 3854 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3855 INVALID_COMMAND_OPCODE, 0);
3856 errsts = check_condition_result;
3857 } else
3858 errsts = resp_unmap(SCpnt, devip);
3859 break;
639db475
FT		 3860 case MODE_SENSE:
3861 case MODE_SENSE_10:
3862 errsts = resp_mode_sense(SCpnt, target, devip);
3863 break;
3864 case MODE_SELECT:
3865 errsts = resp_mode_select(SCpnt, 1, devip);
3866 break;
3867 case MODE_SELECT_10:
3868 errsts = resp_mode_select(SCpnt, 0, devip);
3869 break;
3870 case LOG_SENSE:
3871 errsts = resp_log_sense(SCpnt, devip);
3872 break;
3873 case SYNCHRONIZE_CACHE:
3874 delay_override = 1;
3875 errsts = check_readiness(SCpnt, 0, devip);
3876 break;
3877 case WRITE_BUFFER:
3878 errsts = check_readiness(SCpnt, 1, devip);
3879 break;
3880 case XDWRITEREAD_10:
3881 if (!scsi_bidi_cmnd(SCpnt)) {
3882 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3883 INVALID_FIELD_IN_CDB, 0);
3884 errsts = check_condition_result;
3885 break;
3886 }
3887
3888 errsts = check_readiness(SCpnt, 0, devip);
3889 if (errsts)
3890 break;
3891 if (scsi_debug_fake_rw)
3892 break;
395cef03
MP		 3893 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3894 errsts = resp_read(SCpnt, lba, num, devip, ei_lba);
639db475
FT		 3895 if (errsts)
3896 break;
395cef03 3897 errsts = resp_write(SCpnt, lba, num, devip, ei_lba);
639db475
FT		 3898 if (errsts)
3899 break;
3900 errsts = resp_xdwriteread(SCpnt, lba, num, devip);
3901 break;
395cef03
MP		 3902 case VARIABLE_LENGTH_CMD:
3903 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION) {
3904
3905 if ((cmd[10] & 0xe0) == 0)
3906 printk(KERN_ERR
3907 "Unprotected RD/WR to DIF device\n");
3908
3909 if (cmd[9] == READ_32) {
3910 BUG_ON(SCpnt->cmd_len < 32);
3911 goto read;
3912 }
3913
3914 if (cmd[9] == WRITE_32) {
3915 BUG_ON(SCpnt->cmd_len < 32);
3916 goto write;
3917 }
3918 }
3919
3920 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3921 INVALID_FIELD_IN_CDB, 0);
3922 errsts = check_condition_result;
3923 break;
3924
639db475
FT		 3925 default:
3926 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3927 printk(KERN_INFO "scsi_debug: Opcode: 0x%x not "
3928 "supported\n", *cmd);
3929 errsts = check_readiness(SCpnt, 1, devip);
3930 if (errsts)
3931 break; /* Unit attention takes precedence */
3932 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
3933 errsts = check_condition_result;
3934 break;
3935 }
3936 return schedule_resp(SCpnt, devip, done, errsts,
3937 (delay_override ? 0 : scsi_debug_delay));
3938}
3939
f281233d
JG		 3940static DEF_SCSI_QCMD(scsi_debug_queuecommand)
3941
9e603ca0 3942static struct scsi_host_template sdebug_driver_template = {
c8ed555a
AV		 3943 .show_info = scsi_debug_show_info,
3944 .write_info = scsi_debug_write_info,
9e603ca0
FT		 3945 .proc_name = sdebug_proc_name,
3946 .name = "SCSI DEBUG",
3947 .info = scsi_debug_info,
3948 .slave_alloc = scsi_debug_slave_alloc,
3949 .slave_configure = scsi_debug_slave_configure,
3950 .slave_destroy = scsi_debug_slave_destroy,
3951 .ioctl = scsi_debug_ioctl,
3952 .queuecommand = scsi_debug_queuecommand,
3953 .eh_abort_handler = scsi_debug_abort,
3954 .eh_bus_reset_handler = scsi_debug_bus_reset,
3955 .eh_device_reset_handler = scsi_debug_device_reset,
3956 .eh_host_reset_handler = scsi_debug_host_reset,
3957 .bios_param = scsi_debug_biosparam,
3958 .can_queue = SCSI_DEBUG_CANQUEUE,
3959 .this_id = 7,
3960 .sg_tablesize = 256,
3961 .cmd_per_lun = 16,
3962 .max_sectors = 0xffff,
3963 .use_clustering = DISABLE_CLUSTERING,
3964 .module = THIS_MODULE,
3965};
3966
1da177e4
LT		 3967static int sdebug_driver_probe(struct device * dev)
3968{
3969 int error = 0;
3970 struct sdebug_host_info *sdbg_host;
3971 struct Scsi_Host *hpnt;
c6a44287 3972 int host_prot;
1da177e4
LT		 3973
3974 sdbg_host = to_sdebug_host(dev);
3975
78d4e5a0
DG		 3976 sdebug_driver_template.can_queue = scsi_debug_max_queue;
3977 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
3978 if (NULL == hpnt) {
3979 printk(KERN_ERR "%s: scsi_register failed\n", __func__);
3980 error = -ENODEV;
1da177e4 3981 return error;
78d4e5a0 3982 }
1da177e4
LT		 3983
3984 sdbg_host->shost = hpnt;
3985 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
3986 if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id))
3987 hpnt->max_id = scsi_debug_num_tgts + 1;
3988 else
3989 hpnt->max_id = scsi_debug_num_tgts;
c65b1445 3990 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; /* = scsi_debug_max_luns; */
1da177e4 3991
c6a44287
MP		 3992 host_prot = 0;
3993
3994 switch (scsi_debug_dif) {
3995
3996 case SD_DIF_TYPE1_PROTECTION:
3997 host_prot = SHOST_DIF_TYPE1_PROTECTION;
3998 if (scsi_debug_dix)
3999 host_prot |= SHOST_DIX_TYPE1_PROTECTION;
4000 break;
4001
4002 case SD_DIF_TYPE2_PROTECTION:
4003 host_prot = SHOST_DIF_TYPE2_PROTECTION;
4004 if (scsi_debug_dix)
4005 host_prot |= SHOST_DIX_TYPE2_PROTECTION;
4006 break;
4007
4008 case SD_DIF_TYPE3_PROTECTION:
4009 host_prot = SHOST_DIF_TYPE3_PROTECTION;
4010 if (scsi_debug_dix)
4011 host_prot |= SHOST_DIX_TYPE3_PROTECTION;
4012 break;
4013
4014 default:
4015 if (scsi_debug_dix)
4016 host_prot |= SHOST_DIX_TYPE0_PROTECTION;
4017 break;
4018 }
4019
4020 scsi_host_set_prot(hpnt, host_prot);
4021
4022 printk(KERN_INFO "scsi_debug: host protection%s%s%s%s%s%s%s\n",
4023 (host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
4024 (host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
4025 (host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
4026 (host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
4027 (host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
4028 (host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
4029 (host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
4030
4031 if (scsi_debug_guard == 1)
4032 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
4033 else
4034 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
4035
1da177e4
LT		 4036 error = scsi_add_host(hpnt, &sdbg_host->dev);
4037 if (error) {
cadbd4a5 4038 printk(KERN_ERR "%s: scsi_add_host failed\n", __func__);
1da177e4
LT		 4039 error = -ENODEV;
4040 scsi_host_put(hpnt);
4041 } else
4042 scsi_scan_host(hpnt);
4043
4044
4045 return error;
4046}
4047
4048static int sdebug_driver_remove(struct device * dev)
4049{
1da177e4 4050 struct sdebug_host_info *sdbg_host;
8b40228f 4051 struct sdebug_dev_info *sdbg_devinfo, *tmp;
1da177e4
LT		 4052
4053 sdbg_host = to_sdebug_host(dev);
4054
4055 if (!sdbg_host) {
4056 printk(KERN_ERR "%s: Unable to locate host info\n",
cadbd4a5 4057 __func__);
1da177e4
LT		 4058 return -ENODEV;
4059 }
4060
4061 scsi_remove_host(sdbg_host->shost);
4062
8b40228f
FT		 4063 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
4064 dev_list) {
1da177e4
LT		 4065 list_del(&sdbg_devinfo->dev_list);
4066 kfree(sdbg_devinfo);
4067 }
4068
4069 scsi_host_put(sdbg_host->shost);
4070 return 0;
4071}
4072
8dea0d02
FT		 4073static int pseudo_lld_bus_match(struct device *dev,
4074 struct device_driver *dev_driver)
1da177e4 4075{
8dea0d02 4076 return 1;
1da177e4 4077}
8dea0d02
FT		 4078
4079static struct bus_type pseudo_lld_bus = {
4080 .name = "pseudo",
4081 .match = pseudo_lld_bus_match,
4082 .probe = sdebug_driver_probe,
4083 .remove = sdebug_driver_remove,
4084};
Linux 6.x block layer and io_uring tree(s)