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Merge branch 'x86-reboot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[deliverable/linux.git] / drivers / scsi / scsi_debug.c
CommitLineData
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{
a027b5b9
AM		 2000 sector_t lba = index * scsi_debug_unmap_granularity;
2001
2002 if (scsi_debug_unmap_alignment) {
2003 lba -= scsi_debug_unmap_granularity -
2004 scsi_debug_unmap_alignment;
2005 }
2006
2007 return lba;
b90ebc3d 2008}
44d92694 2009
b90ebc3d
AM		 2010static unsigned int map_state(sector_t lba, unsigned int *num)
2011{
2012 sector_t end;
2013 unsigned int mapped;
2014 unsigned long index;
2015 unsigned long next;
44d92694 2016
b90ebc3d
AM		 2017 index = lba_to_map_index(lba);
2018 mapped = test_bit(index, map_storep);
44d92694
MP		 2019
2020 if (mapped)
b90ebc3d 2021 next = find_next_zero_bit(map_storep, map_size, index);
44d92694 2022 else
b90ebc3d 2023 next = find_next_bit(map_storep, map_size, index);
44d92694 2024
b90ebc3d 2025 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
44d92694
MP		 2026 *num = end - lba;
2027
2028 return mapped;
2029}
2030
2031static void map_region(sector_t lba, unsigned int len)
2032{
44d92694
MP		 2033 sector_t end = lba + len;
2034
44d92694 2035 while (lba < end) {
b90ebc3d 2036 unsigned long index = lba_to_map_index(lba);
44d92694 2037
b90ebc3d
AM		 2038 if (index < map_size)
2039 set_bit(index, map_storep);
44d92694 2040
b90ebc3d 2041 lba = map_index_to_lba(index + 1);
44d92694
MP		 2042 }
2043}
2044
2045static void unmap_region(sector_t lba, unsigned int len)
2046{
44d92694
MP		 2047 sector_t end = lba + len;
2048
44d92694 2049 while (lba < end) {
b90ebc3d 2050 unsigned long index = lba_to_map_index(lba);
44d92694 2051
b90ebc3d
AM		 2052 if (lba == map_index_to_lba(index) &&
2053 lba + scsi_debug_unmap_granularity <= end &&
2054 index < map_size) {
2055 clear_bit(index, map_storep);
2056 if (scsi_debug_lbprz) {
be1dd78d 2057 memset(fake_storep +
cc34a8e6
AM		 2058 lba * scsi_debug_sector_size, 0,
2059 scsi_debug_sector_size *
2060 scsi_debug_unmap_granularity);
b90ebc3d 2061 }
e9926b43
AM		 2062 if (dif_storep) {
2063 memset(dif_storep + lba, 0xff,
2064 sizeof(*dif_storep) *
2065 scsi_debug_unmap_granularity);
2066 }
be1dd78d 2067 }
b90ebc3d 2068 lba = map_index_to_lba(index + 1);
44d92694
MP		 2069 }
2070}
2071
19789100 2072static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba,
395cef03
MP		 2073 unsigned int num, struct sdebug_dev_info *devip,
2074 u32 ei_lba)
1da177e4
LT		 2075{
2076 unsigned long iflags;
19789100 2077 int ret;
1da177e4 2078
19789100
FT		 2079 ret = check_device_access_params(devip, lba, num);
2080 if (ret)
2081 return ret;
1da177e4 2082
c6a44287
MP		 2083 /* DIX + T10 DIF */
2084 if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
395cef03 2085 int prot_ret = prot_verify_write(SCpnt, lba, num, ei_lba);
c6a44287
MP		 2086
2087 if (prot_ret) {
2088 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, prot_ret);
2089 return illegal_condition_result;
2090 }
2091 }
2092
1da177e4 2093 write_lock_irqsave(&atomic_rw, iflags);
19789100 2094 ret = do_device_access(SCpnt, devip, lba, num, 1);
9ed8d3dc 2095 if (scsi_debug_lbp())
44d92694 2096 map_region(lba, num);
1da177e4 2097 write_unlock_irqrestore(&atomic_rw, iflags);
19789100 2098 if (-1 == ret)
1da177e4 2099 return (DID_ERROR << 16);
597136ab 2100 else if ((ret < (num * scsi_debug_sector_size)) &&
1da177e4 2101 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
c65b1445 2102 printk(KERN_INFO "scsi_debug: write: cdb indicated=%u, "
597136ab 2103 " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret);
44d92694
MP		 2104
2105 return 0;
2106}
2107
2108static int resp_write_same(struct scsi_cmnd *scmd, unsigned long long lba,
2109 unsigned int num, struct sdebug_dev_info *devip,
2110 u32 ei_lba, unsigned int unmap)
2111{
2112 unsigned long iflags;
2113 unsigned long long i;
2114 int ret;
2115
2116 ret = check_device_access_params(devip, lba, num);
2117 if (ret)
2118 return ret;
2119
5b94e232
MP		 2120 if (num > scsi_debug_write_same_length) {
2121 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
2122 0);
2123 return check_condition_result;
2124 }
2125
44d92694
MP		 2126 write_lock_irqsave(&atomic_rw, iflags);
2127
9ed8d3dc 2128 if (unmap && scsi_debug_lbp()) {
44d92694
MP		 2129 unmap_region(lba, num);
2130 goto out;
2131 }
2132
2133 /* Else fetch one logical block */
2134 ret = fetch_to_dev_buffer(scmd,
2135 fake_storep + (lba * scsi_debug_sector_size),
2136 scsi_debug_sector_size);
2137
2138 if (-1 == ret) {
2139 write_unlock_irqrestore(&atomic_rw, iflags);
2140 return (DID_ERROR << 16);
2141 } else if ((ret < (num * scsi_debug_sector_size)) &&
2142 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2143 printk(KERN_INFO "scsi_debug: write same: cdb indicated=%u, "
2144 " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret);
2145
2146 /* Copy first sector to remaining blocks */
2147 for (i = 1 ; i < num ; i++)
2148 memcpy(fake_storep + ((lba + i) * scsi_debug_sector_size),
2149 fake_storep + (lba * scsi_debug_sector_size),
2150 scsi_debug_sector_size);
2151
9ed8d3dc 2152 if (scsi_debug_lbp())
44d92694
MP		 2153 map_region(lba, num);
2154out:
2155 write_unlock_irqrestore(&atomic_rw, iflags);
2156
1da177e4
LT		 2157 return 0;
2158}
2159
44d92694
MP		 2160struct unmap_block_desc {
2161 __be64 lba;
2162 __be32 blocks;
2163 __be32 __reserved;
2164};
2165
2166static int resp_unmap(struct scsi_cmnd * scmd, struct sdebug_dev_info * devip)
2167{
2168 unsigned char *buf;
2169 struct unmap_block_desc *desc;
2170 unsigned int i, payload_len, descriptors;
2171 int ret;
2172
2173 ret = check_readiness(scmd, 1, devip);
2174 if (ret)
2175 return ret;
2176
2177 payload_len = get_unaligned_be16(&scmd->cmnd[7]);
2178 BUG_ON(scsi_bufflen(scmd) != payload_len);
2179
2180 descriptors = (payload_len - 8) / 16;
2181
2182 buf = kmalloc(scsi_bufflen(scmd), GFP_ATOMIC);
2183 if (!buf)
2184 return check_condition_result;
2185
2186 scsi_sg_copy_to_buffer(scmd, buf, scsi_bufflen(scmd));
2187
2188 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
2189 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
2190
2191 desc = (void *)&buf[8];
2192
2193 for (i = 0 ; i < descriptors ; i++) {
2194 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
2195 unsigned int num = get_unaligned_be32(&desc[i].blocks);
2196
2197 ret = check_device_access_params(devip, lba, num);
2198 if (ret)
2199 goto out;
2200
2201 unmap_region(lba, num);
2202 }
2203
2204 ret = 0;
2205
2206out:
2207 kfree(buf);
2208
2209 return ret;
2210}
2211
2212#define SDEBUG_GET_LBA_STATUS_LEN 32
2213
2214static int resp_get_lba_status(struct scsi_cmnd * scmd,
2215 struct sdebug_dev_info * devip)
2216{
2217 unsigned long long lba;
2218 unsigned int alloc_len, mapped, num;
2219 unsigned char arr[SDEBUG_GET_LBA_STATUS_LEN];
2220 int ret;
2221
2222 ret = check_readiness(scmd, 1, devip);
2223 if (ret)
2224 return ret;
2225
2226 lba = get_unaligned_be64(&scmd->cmnd[2]);
2227 alloc_len = get_unaligned_be32(&scmd->cmnd[10]);
2228
2229 if (alloc_len < 24)
2230 return 0;
2231
2232 ret = check_device_access_params(devip, lba, 1);
2233 if (ret)
2234 return ret;
2235
2236 mapped = map_state(lba, &num);
2237
2238 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
de13e965 2239 put_unaligned_be32(20, &arr[0]); /* Parameter Data Length */
44d92694
MP		 2240 put_unaligned_be64(lba, &arr[8]); /* LBA */
2241 put_unaligned_be32(num, &arr[16]); /* Number of blocks */
2242 arr[20] = !mapped; /* mapped = 0, unmapped = 1 */
2243
2244 return fill_from_dev_buffer(scmd, arr, SDEBUG_GET_LBA_STATUS_LEN);
2245}
2246
c65b1445 2247#define SDEBUG_RLUN_ARR_SZ 256
1da177e4
LT		 2248
2249static int resp_report_luns(struct scsi_cmnd * scp,
2250 struct sdebug_dev_info * devip)
2251{
2252 unsigned int alloc_len;
c65b1445 2253 int lun_cnt, i, upper, num, n, wlun, lun;
1da177e4
LT		 2254 unsigned char *cmd = (unsigned char *)scp->cmnd;
2255 int select_report = (int)cmd[2];
2256 struct scsi_lun *one_lun;
2257 unsigned char arr[SDEBUG_RLUN_ARR_SZ];
c65b1445 2258 unsigned char * max_addr;
1da177e4
LT		 2259
2260 alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
c65b1445 2261 if ((alloc_len < 4) || (select_report > 2)) {
1da177e4
LT		 2262 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
2263 0);
2264 return check_condition_result;
2265 }
2266 /* can produce response with up to 16k luns (lun 0 to lun 16383) */
2267 memset(arr, 0, SDEBUG_RLUN_ARR_SZ);
2268 lun_cnt = scsi_debug_max_luns;
c65b1445
DG		 2269 if (1 == select_report)
2270 lun_cnt = 0;
2271 else if (scsi_debug_no_lun_0 && (lun_cnt > 0))
2272 --lun_cnt;
2273 wlun = (select_report > 0) ? 1 : 0;
2274 num = lun_cnt + wlun;
2275 arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff;
2276 arr[3] = (sizeof(struct scsi_lun) * num) & 0xff;
2277 n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) /
2278 sizeof(struct scsi_lun)), num);
2279 if (n < num) {
2280 wlun = 0;
2281 lun_cnt = n;
2282 }
1da177e4 2283 one_lun = (struct scsi_lun *) &arr[8];
c65b1445
DG		 2284 max_addr = arr + SDEBUG_RLUN_ARR_SZ;
2285 for (i = 0, lun = (scsi_debug_no_lun_0 ? 1 : 0);
2286 ((i < lun_cnt) && ((unsigned char *)(one_lun + i) < max_addr));
2287 i++, lun++) {
2288 upper = (lun >> 8) & 0x3f;
1da177e4
LT		 2289 if (upper)
2290 one_lun[i].scsi_lun[0] =
2291 (upper | (SAM2_LUN_ADDRESS_METHOD << 6));
c65b1445
DG		 2292 one_lun[i].scsi_lun[1] = lun & 0xff;
2293 }
2294 if (wlun) {
2295 one_lun[i].scsi_lun[0] = (SAM2_WLUN_REPORT_LUNS >> 8) & 0xff;
2296 one_lun[i].scsi_lun[1] = SAM2_WLUN_REPORT_LUNS & 0xff;
2297 i++;
1da177e4 2298 }
c65b1445 2299 alloc_len = (unsigned char *)(one_lun + i) - arr;
1da177e4
LT		 2300 return fill_from_dev_buffer(scp, arr,
2301 min((int)alloc_len, SDEBUG_RLUN_ARR_SZ));
2302}
2303
c639d14e
FT		 2304static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
2305 unsigned int num, struct sdebug_dev_info *devip)
2306{
2307 int i, j, ret = -1;
2308 unsigned char *kaddr, *buf;
2309 unsigned int offset;
2310 struct scatterlist *sg;
2311 struct scsi_data_buffer *sdb = scsi_in(scp);
2312
2313 /* better not to use temporary buffer. */
2314 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
2315 if (!buf)
2316 return ret;
2317
21a61829 2318 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
c639d14e
FT		 2319
2320 offset = 0;
2321 for_each_sg(sdb->table.sgl, sg, sdb->table.nents, i) {
77dfce07 2322 kaddr = (unsigned char *)kmap_atomic(sg_page(sg));
c639d14e
FT		 2323 if (!kaddr)
2324 goto out;
2325
2326 for (j = 0; j < sg->length; j++)
2327 *(kaddr + sg->offset + j) ^= *(buf + offset + j);
2328
2329 offset += sg->length;
77dfce07 2330 kunmap_atomic(kaddr);
c639d14e
FT		 2331 }
2332 ret = 0;
2333out:
2334 kfree(buf);
2335
2336 return ret;
2337}
2338
1da177e4
LT		 2339/* When timer goes off this function is called. */
2340static void timer_intr_handler(unsigned long indx)
2341{
2342 struct sdebug_queued_cmd * sqcp;
2343 unsigned long iflags;
2344
78d4e5a0 2345 if (indx >= scsi_debug_max_queue) {
1da177e4
LT		 2346 printk(KERN_ERR "scsi_debug:timer_intr_handler: indx too "
2347 "large\n");
2348 return;
2349 }
2350 spin_lock_irqsave(&queued_arr_lock, iflags);
2351 sqcp = &queued_arr[(int)indx];
2352 if (! sqcp->in_use) {
2353 printk(KERN_ERR "scsi_debug:timer_intr_handler: Unexpected "
2354 "interrupt\n");
2355 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2356 return;
2357 }
2358 sqcp->in_use = 0;
2359 if (sqcp->done_funct) {
2360 sqcp->a_cmnd->result = sqcp->scsi_result;
2361 sqcp->done_funct(sqcp->a_cmnd); /* callback to mid level */
2362 }
2363 sqcp->done_funct = NULL;
2364 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2365}
2366
1da177e4 2367
8dea0d02
FT		 2368static struct sdebug_dev_info *
2369sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags)
5cb2fc06
FT		 2370{
2371 struct sdebug_dev_info *devip;
2372
2373 devip = kzalloc(sizeof(*devip), flags);
2374 if (devip) {
2375 devip->sdbg_host = sdbg_host;
2376 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
2377 }
2378 return devip;
2379}
2380
1da177e4
LT		 2381static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev)
2382{
2383 struct sdebug_host_info * sdbg_host;
2384 struct sdebug_dev_info * open_devip = NULL;
2385 struct sdebug_dev_info * devip =
2386 (struct sdebug_dev_info *)sdev->hostdata;
2387
2388 if (devip)
2389 return devip;
d1e4c9c5
FT		 2390 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
2391 if (!sdbg_host) {
1da177e4
LT		 2392 printk(KERN_ERR "Host info NULL\n");
2393 return NULL;
2394 }
2395 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
2396 if ((devip->used) && (devip->channel == sdev->channel) &&
2397 (devip->target == sdev->id) &&
2398 (devip->lun == sdev->lun))
2399 return devip;
2400 else {
2401 if ((!devip->used) && (!open_devip))
2402 open_devip = devip;
2403 }
2404 }
5cb2fc06
FT		 2405 if (!open_devip) { /* try and make a new one */
2406 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
2407 if (!open_devip) {
1da177e4 2408 printk(KERN_ERR "%s: out of memory at line %d\n",
cadbd4a5 2409 __func__, __LINE__);
1da177e4
LT		 2410 return NULL;
2411 }
1da177e4 2412 }
a75869d1
FT		 2413
2414 open_devip->channel = sdev->channel;
2415 open_devip->target = sdev->id;
2416 open_devip->lun = sdev->lun;
2417 open_devip->sdbg_host = sdbg_host;
2418 open_devip->reset = 1;
2419 open_devip->used = 1;
2420 memset(open_devip->sense_buff, 0, SDEBUG_SENSE_LEN);
2421 if (scsi_debug_dsense)
2422 open_devip->sense_buff[0] = 0x72;
2423 else {
2424 open_devip->sense_buff[0] = 0x70;
2425 open_devip->sense_buff[7] = 0xa;
2426 }
2427 if (sdev->lun == SAM2_WLUN_REPORT_LUNS)
2428 open_devip->wlun = SAM2_WLUN_REPORT_LUNS & 0xff;
2429
2430 return open_devip;
1da177e4
LT		 2431}
2432
8dea0d02 2433static int scsi_debug_slave_alloc(struct scsi_device *sdp)
1da177e4 2434{
8dea0d02
FT		 2435 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2436 printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %u>\n",
2437 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
75ad23bc 2438 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue);
8dea0d02
FT		 2439 return 0;
2440}
1da177e4 2441
8dea0d02
FT		 2442static int scsi_debug_slave_configure(struct scsi_device *sdp)
2443{
2444 struct sdebug_dev_info *devip;
a34c4e98 2445
8dea0d02
FT		 2446 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2447 printk(KERN_INFO "scsi_debug: slave_configure <%u %u %u %u>\n",
2448 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
2449 if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN)
2450 sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN;
2451 devip = devInfoReg(sdp);
2452 if (NULL == devip)
2453 return 1; /* no resources, will be marked offline */
2454 sdp->hostdata = devip;
2455 if (sdp->host->cmd_per_lun)
2456 scsi_adjust_queue_depth(sdp, SDEBUG_TAGGED_QUEUING,
2457 sdp->host->cmd_per_lun);
2458 blk_queue_max_segment_size(sdp->request_queue, 256 * 1024);
78d4e5a0
DG		 2459 if (scsi_debug_no_uld)
2460 sdp->no_uld_attach = 1;
8dea0d02
FT		 2461 return 0;
2462}
2463
2464static void scsi_debug_slave_destroy(struct scsi_device *sdp)
2465{
2466 struct sdebug_dev_info *devip =
2467 (struct sdebug_dev_info *)sdp->hostdata;
a34c4e98 2468
1da177e4 2469 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
8dea0d02
FT		 2470 printk(KERN_INFO "scsi_debug: slave_destroy <%u %u %u %u>\n",
2471 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
2472 if (devip) {
25985edc 2473 /* make this slot available for re-use */
8dea0d02
FT		 2474 devip->used = 0;
2475 sdp->hostdata = NULL;
2476 }
2477}
2478
2479/* Returns 1 if found 'cmnd' and deleted its timer. else returns 0 */
2480static int stop_queued_cmnd(struct scsi_cmnd *cmnd)
2481{
2482 unsigned long iflags;
2483 int k;
2484 struct sdebug_queued_cmd *sqcp;
2485
2486 spin_lock_irqsave(&queued_arr_lock, iflags);
78d4e5a0 2487 for (k = 0; k < scsi_debug_max_queue; ++k) {
8dea0d02
FT		 2488 sqcp = &queued_arr[k];
2489 if (sqcp->in_use && (cmnd == sqcp->a_cmnd)) {
2490 del_timer_sync(&sqcp->cmnd_timer);
2491 sqcp->in_use = 0;
2492 sqcp->a_cmnd = NULL;
2493 break;
2494 }
2495 }
2496 spin_unlock_irqrestore(&queued_arr_lock, iflags);
78d4e5a0 2497 return (k < scsi_debug_max_queue) ? 1 : 0;
8dea0d02
FT		 2498}
2499
2500/* Deletes (stops) timers of all queued commands */
2501static void stop_all_queued(void)
2502{
2503 unsigned long iflags;
2504 int k;
2505 struct sdebug_queued_cmd *sqcp;
2506
2507 spin_lock_irqsave(&queued_arr_lock, iflags);
78d4e5a0 2508 for (k = 0; k < scsi_debug_max_queue; ++k) {
8dea0d02
FT		 2509 sqcp = &queued_arr[k];
2510 if (sqcp->in_use && sqcp->a_cmnd) {
2511 del_timer_sync(&sqcp->cmnd_timer);
2512 sqcp->in_use = 0;
2513 sqcp->a_cmnd = NULL;
2514 }
2515 }
2516 spin_unlock_irqrestore(&queued_arr_lock, iflags);
1da177e4
LT		 2517}
2518
2519static int scsi_debug_abort(struct scsi_cmnd * SCpnt)
2520{
2521 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2522 printk(KERN_INFO "scsi_debug: abort\n");
2523 ++num_aborts;
2524 stop_queued_cmnd(SCpnt);
2525 return SUCCESS;
2526}
2527
2528static int scsi_debug_biosparam(struct scsi_device *sdev,
2529 struct block_device * bdev, sector_t capacity, int *info)
2530{
2531 int res;
2532 unsigned char *buf;
2533
2534 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2535 printk(KERN_INFO "scsi_debug: biosparam\n");
2536 buf = scsi_bios_ptable(bdev);
2537 if (buf) {
2538 res = scsi_partsize(buf, capacity,
2539 &info[2], &info[0], &info[1]);
2540 kfree(buf);
2541 if (! res)
2542 return res;
2543 }
2544 info[0] = sdebug_heads;
2545 info[1] = sdebug_sectors_per;
2546 info[2] = sdebug_cylinders_per;
2547 return 0;
2548}
2549
2550static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
2551{
2552 struct sdebug_dev_info * devip;
2553
2554 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2555 printk(KERN_INFO "scsi_debug: device_reset\n");
2556 ++num_dev_resets;
2557 if (SCpnt) {
2558 devip = devInfoReg(SCpnt->device);
2559 if (devip)
2560 devip->reset = 1;
2561 }
2562 return SUCCESS;
2563}
2564
2565static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
2566{
2567 struct sdebug_host_info *sdbg_host;
2568 struct sdebug_dev_info * dev_info;
2569 struct scsi_device * sdp;
2570 struct Scsi_Host * hp;
2571
2572 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2573 printk(KERN_INFO "scsi_debug: bus_reset\n");
2574 ++num_bus_resets;
2575 if (SCpnt && ((sdp = SCpnt->device)) && ((hp = sdp->host))) {
d1e4c9c5 2576 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
1da177e4
LT		 2577 if (sdbg_host) {
2578 list_for_each_entry(dev_info,
2579 &sdbg_host->dev_info_list,
2580 dev_list)
2581 dev_info->reset = 1;
2582 }
2583 }
2584 return SUCCESS;
2585}
2586
2587static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
2588{
2589 struct sdebug_host_info * sdbg_host;
2590 struct sdebug_dev_info * dev_info;
2591
2592 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2593 printk(KERN_INFO "scsi_debug: host_reset\n");
2594 ++num_host_resets;
2595 spin_lock(&sdebug_host_list_lock);
2596 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
2597 list_for_each_entry(dev_info, &sdbg_host->dev_info_list,
2598 dev_list)
2599 dev_info->reset = 1;
2600 }
2601 spin_unlock(&sdebug_host_list_lock);
2602 stop_all_queued();
2603 return SUCCESS;
2604}
2605
1da177e4
LT		 2606/* Initializes timers in queued array */
2607static void __init init_all_queued(void)
2608{
2609 unsigned long iflags;
2610 int k;
2611 struct sdebug_queued_cmd * sqcp;
2612
2613 spin_lock_irqsave(&queued_arr_lock, iflags);
78d4e5a0 2614 for (k = 0; k < scsi_debug_max_queue; ++k) {
1da177e4
LT		 2615 sqcp = &queued_arr[k];
2616 init_timer(&sqcp->cmnd_timer);
2617 sqcp->in_use = 0;
2618 sqcp->a_cmnd = NULL;
2619 }
2620 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2621}
2622
f58b0efb 2623static void __init sdebug_build_parts(unsigned char *ramp,
5f2578e5 2624 unsigned long store_size)
1da177e4
LT		 2625{
2626 struct partition * pp;
2627 int starts[SDEBUG_MAX_PARTS + 2];
2628 int sectors_per_part, num_sectors, k;
2629 int heads_by_sects, start_sec, end_sec;
2630
2631 /* assume partition table already zeroed */
f58b0efb 2632 if ((scsi_debug_num_parts < 1) || (store_size < 1048576))
1da177e4
LT		 2633 return;
2634 if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) {
2635 scsi_debug_num_parts = SDEBUG_MAX_PARTS;
2636 printk(KERN_WARNING "scsi_debug:build_parts: reducing "
2637 "partitions to %d\n", SDEBUG_MAX_PARTS);
2638 }
c65b1445 2639 num_sectors = (int)sdebug_store_sectors;
1da177e4
LT		 2640 sectors_per_part = (num_sectors - sdebug_sectors_per)
2641 / scsi_debug_num_parts;
2642 heads_by_sects = sdebug_heads * sdebug_sectors_per;
2643 starts[0] = sdebug_sectors_per;
2644 for (k = 1; k < scsi_debug_num_parts; ++k)
2645 starts[k] = ((k * sectors_per_part) / heads_by_sects)
2646 * heads_by_sects;
2647 starts[scsi_debug_num_parts] = num_sectors;
2648 starts[scsi_debug_num_parts + 1] = 0;
2649
2650 ramp[510] = 0x55; /* magic partition markings */
2651 ramp[511] = 0xAA;
2652 pp = (struct partition *)(ramp + 0x1be);
2653 for (k = 0; starts[k + 1]; ++k, ++pp) {
2654 start_sec = starts[k];
2655 end_sec = starts[k + 1] - 1;
2656 pp->boot_ind = 0;
2657
2658 pp->cyl = start_sec / heads_by_sects;
2659 pp->head = (start_sec - (pp->cyl * heads_by_sects))
2660 / sdebug_sectors_per;
2661 pp->sector = (start_sec % sdebug_sectors_per) + 1;
2662
2663 pp->end_cyl = end_sec / heads_by_sects;
2664 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
2665 / sdebug_sectors_per;
2666 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
2667
150c3544
AM		 2668 pp->start_sect = cpu_to_le32(start_sec);
2669 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
1da177e4
LT		 2670 pp->sys_ind = 0x83; /* plain Linux partition */
2671 }
2672}
2673
2674static int schedule_resp(struct scsi_cmnd * cmnd,
2675 struct sdebug_dev_info * devip,
2676 done_funct_t done, int scsi_result, int delta_jiff)
2677{
2678 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmnd) {
2679 if (scsi_result) {
2680 struct scsi_device * sdp = cmnd->device;
2681
c65b1445
DG		 2682 printk(KERN_INFO "scsi_debug: <%u %u %u %u> "
2683 "non-zero result=0x%x\n", sdp->host->host_no,
2684 sdp->channel, sdp->id, sdp->lun, scsi_result);
1da177e4
LT		 2685 }
2686 }
2687 if (cmnd && devip) {
2688 /* simulate autosense by this driver */
2689 if (SAM_STAT_CHECK_CONDITION == (scsi_result & 0xff))
2690 memcpy(cmnd->sense_buffer, devip->sense_buff,
2691 (SCSI_SENSE_BUFFERSIZE > SDEBUG_SENSE_LEN) ?
2692 SDEBUG_SENSE_LEN : SCSI_SENSE_BUFFERSIZE);
2693 }
2694 if (delta_jiff <= 0) {
2695 if (cmnd)
2696 cmnd->result = scsi_result;
2697 if (done)
2698 done(cmnd);
2699 return 0;
2700 } else {
2701 unsigned long iflags;
2702 int k;
2703 struct sdebug_queued_cmd * sqcp = NULL;
2704
2705 spin_lock_irqsave(&queued_arr_lock, iflags);
78d4e5a0 2706 for (k = 0; k < scsi_debug_max_queue; ++k) {
1da177e4
LT		 2707 sqcp = &queued_arr[k];
2708 if (! sqcp->in_use)
2709 break;
2710 }
78d4e5a0 2711 if (k >= scsi_debug_max_queue) {
1da177e4
LT		 2712 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2713 printk(KERN_WARNING "scsi_debug: can_queue exceeded\n");
2714 return 1; /* report busy to mid level */
2715 }
2716 sqcp->in_use = 1;
2717 sqcp->a_cmnd = cmnd;
2718 sqcp->scsi_result = scsi_result;
2719 sqcp->done_funct = done;
2720 sqcp->cmnd_timer.function = timer_intr_handler;
2721 sqcp->cmnd_timer.data = k;
2722 sqcp->cmnd_timer.expires = jiffies + delta_jiff;
2723 add_timer(&sqcp->cmnd_timer);
2724 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2725 if (cmnd)
2726 cmnd->result = 0;
2727 return 0;
2728 }
2729}
23183910
DG		 2730/* Note: The following macros create attribute files in the
2731 /sys/module/scsi_debug/parameters directory. Unfortunately this
2732 driver is unaware of a change and cannot trigger auxiliary actions
2733 as it can when the corresponding attribute in the
2734 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
2735 */
c65b1445 2736module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR);
5b94e232 2737module_param_named(ato, scsi_debug_ato, int, S_IRUGO);
c65b1445
DG		 2738module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR);
2739module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO);
5b94e232
MP		 2740module_param_named(dif, scsi_debug_dif, int, S_IRUGO);
2741module_param_named(dix, scsi_debug_dix, int, S_IRUGO);
c65b1445
DG		 2742module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR);
2743module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR);
23183910 2744module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR);
5b94e232
MP		 2745module_param_named(guard, scsi_debug_guard, int, S_IRUGO);
2746module_param_named(lbpu, scsi_debug_lbpu, int, S_IRUGO);
2747module_param_named(lbpws, scsi_debug_lbpws, int, S_IRUGO);
2748module_param_named(lbpws10, scsi_debug_lbpws10, int, S_IRUGO);
be1dd78d 2749module_param_named(lbprz, scsi_debug_lbprz, int, S_IRUGO);
5b94e232 2750module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO);
c65b1445 2751module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR);
78d4e5a0 2752module_param_named(max_queue, scsi_debug_max_queue, int, S_IRUGO | S_IWUSR);
c65b1445 2753module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR);
78d4e5a0 2754module_param_named(no_uld, scsi_debug_no_uld, int, S_IRUGO);
c65b1445
DG		 2755module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO);
2756module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR);
5b94e232 2757module_param_named(opt_blks, scsi_debug_opt_blks, int, S_IRUGO);
c65b1445 2758module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR);
5b94e232 2759module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO);
c65b1445 2760module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR);
d986788b 2761module_param_named(removable, scsi_debug_removable, bool, S_IRUGO | S_IWUSR);
c65b1445 2762module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO);
597136ab 2763module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO);
5b94e232
MP		 2764module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO);
2765module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO);
44d92694
MP		 2766module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO);
2767module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, int, S_IRUGO);
5b94e232
MP		 2768module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR);
2769module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int,
2770 S_IRUGO | S_IWUSR);
2771module_param_named(write_same_length, scsi_debug_write_same_length, int,
2772 S_IRUGO | S_IWUSR);
1da177e4
LT		 2773
2774MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
2775MODULE_DESCRIPTION("SCSI debug adapter driver");
2776MODULE_LICENSE("GPL");
2777MODULE_VERSION(SCSI_DEBUG_VERSION);
2778
2779MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
5b94e232 2780MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
1da177e4 2781MODULE_PARM_DESC(delay, "# of jiffies to delay response(def=1)");
c65b1445 2782MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs(def=8)");
5b94e232
MP		 2783MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
2784MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
c65b1445 2785MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
beb87c33 2786MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
23183910 2787MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
5b94e232
MP		 2788MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
2789MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
2790MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
2791MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
be1dd78d 2792MODULE_PARM_DESC(lbprz, "unmapped blocks return 0 on read (def=1)");
5b94e232 2793MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
c65b1445 2794MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
78d4e5a0 2795MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to 255(def))");
c65b1445 2796MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
78d4e5a0 2797MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
1da177e4 2798MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
c65b1445 2799MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
5b94e232 2800MODULE_PARM_DESC(opt_blks, "optimal transfer length in block (def=64)");
6f3cbf55 2801MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
5b94e232 2802MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
1da177e4 2803MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
d986788b 2804MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
1da177e4 2805MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])");
ea61fca5 2806MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
5b94e232
MP		 2807MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
2808MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
6014759c
MP		 2809MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
2810MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
5b94e232
MP		 2811MODULE_PARM_DESC(virtual_gb, "virtual gigabyte size (def=0 -> use dev_size_mb)");
2812MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
2813MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
1da177e4
LT		 2814
2815static char sdebug_info[256];
2816
2817static const char * scsi_debug_info(struct Scsi_Host * shp)
2818{
2819 sprintf(sdebug_info, "scsi_debug, version %s [%s], "
2820 "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION,
2821 scsi_debug_version_date, scsi_debug_dev_size_mb,
2822 scsi_debug_opts);
2823 return sdebug_info;
2824}
2825
2826/* scsi_debug_proc_info
2827 * Used if the driver currently has no own support for /proc/scsi
2828 */
c8ed555a 2829static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer, int length)
1da177e4 2830{
c8ed555a
AV		 2831 char arr[16];
2832 int opts;
2833 int minLen = length > 15 ? 15 : length;
1da177e4 2834
c8ed555a
AV		 2835 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
2836 return -EACCES;
2837 memcpy(arr, buffer, minLen);
2838 arr[minLen] = '\0';
2839 if (1 != sscanf(arr, "%d", &opts))
2840 return -EINVAL;
2841 scsi_debug_opts = opts;
2842 if (scsi_debug_every_nth != 0)
2843 scsi_debug_cmnd_count = 0;
2844 return length;
2845}
1da177e4 2846
c8ed555a
AV		 2847static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
2848{
2849 seq_printf(m, "scsi_debug adapter driver, version "
1da177e4
LT		 2850 "%s [%s]\n"
2851 "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, "
2852 "every_nth=%d(curr:%d)\n"
2853 "delay=%d, max_luns=%d, scsi_level=%d\n"
2854 "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n"
2855 "number of aborts=%d, device_reset=%d, bus_resets=%d, "
c6a44287 2856 "host_resets=%d\ndix_reads=%d dix_writes=%d dif_errors=%d\n",
1da177e4
LT		 2857 SCSI_DEBUG_VERSION, scsi_debug_version_date, scsi_debug_num_tgts,
2858 scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth,
2859 scsi_debug_cmnd_count, scsi_debug_delay,
2860 scsi_debug_max_luns, scsi_debug_scsi_level,
597136ab
MP		 2861 scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads,
2862 sdebug_sectors_per, num_aborts, num_dev_resets, num_bus_resets,
c6a44287 2863 num_host_resets, dix_reads, dix_writes, dif_errors);
c8ed555a 2864 return 0;
1da177e4
LT		 2865}
2866
2867static ssize_t sdebug_delay_show(struct device_driver * ddp, char * buf)
2868{
2869 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay);
2870}
2871
2872static ssize_t sdebug_delay_store(struct device_driver * ddp,
2873 const char * buf, size_t count)
2874{
2875 int delay;
2876 char work[20];
2877
2878 if (1 == sscanf(buf, "%10s", work)) {
2879 if ((1 == sscanf(work, "%d", &delay)) && (delay >= 0)) {
2880 scsi_debug_delay = delay;
2881 return count;
2882 }
2883 }
2884 return -EINVAL;
2885}
2886DRIVER_ATTR(delay, S_IRUGO | S_IWUSR, sdebug_delay_show,
2887 sdebug_delay_store);
2888
2889static ssize_t sdebug_opts_show(struct device_driver * ddp, char * buf)
2890{
2891 return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts);
2892}
2893
2894static ssize_t sdebug_opts_store(struct device_driver * ddp,
2895 const char * buf, size_t count)
2896{
2897 int opts;
2898 char work[20];
2899
2900 if (1 == sscanf(buf, "%10s", work)) {
2901 if (0 == strnicmp(work,"0x", 2)) {
2902 if (1 == sscanf(&work[2], "%x", &opts))
2903 goto opts_done;
2904 } else {
2905 if (1 == sscanf(work, "%d", &opts))
2906 goto opts_done;
2907 }
2908 }
2909 return -EINVAL;
2910opts_done:
2911 scsi_debug_opts = opts;
2912 scsi_debug_cmnd_count = 0;
2913 return count;
2914}
2915DRIVER_ATTR(opts, S_IRUGO | S_IWUSR, sdebug_opts_show,
2916 sdebug_opts_store);
2917
2918static ssize_t sdebug_ptype_show(struct device_driver * ddp, char * buf)
2919{
2920 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype);
2921}
2922static ssize_t sdebug_ptype_store(struct device_driver * ddp,
2923 const char * buf, size_t count)
2924{
2925 int n;
2926
2927 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2928 scsi_debug_ptype = n;
2929 return count;
2930 }
2931 return -EINVAL;
2932}
2933DRIVER_ATTR(ptype, S_IRUGO | S_IWUSR, sdebug_ptype_show, sdebug_ptype_store);
2934
2935static ssize_t sdebug_dsense_show(struct device_driver * ddp, char * buf)
2936{
2937 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense);
2938}
2939static ssize_t sdebug_dsense_store(struct device_driver * ddp,
2940 const char * buf, size_t count)
2941{
2942 int n;
2943
2944 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2945 scsi_debug_dsense = n;
2946 return count;
2947 }
2948 return -EINVAL;
2949}
2950DRIVER_ATTR(dsense, S_IRUGO | S_IWUSR, sdebug_dsense_show,
2951 sdebug_dsense_store);
2952
23183910
DG		 2953static ssize_t sdebug_fake_rw_show(struct device_driver * ddp, char * buf)
2954{
2955 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw);
2956}
2957static ssize_t sdebug_fake_rw_store(struct device_driver * ddp,
2958 const char * buf, size_t count)
2959{
2960 int n;
2961
2962 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2963 scsi_debug_fake_rw = n;
2964 return count;
2965 }
2966 return -EINVAL;
2967}
2968DRIVER_ATTR(fake_rw, S_IRUGO | S_IWUSR, sdebug_fake_rw_show,
2969 sdebug_fake_rw_store);
2970
c65b1445
DG		 2971static ssize_t sdebug_no_lun_0_show(struct device_driver * ddp, char * buf)
2972{
2973 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0);
2974}
2975static ssize_t sdebug_no_lun_0_store(struct device_driver * ddp,
2976 const char * buf, size_t count)
2977{
2978 int n;
2979
2980 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2981 scsi_debug_no_lun_0 = n;
2982 return count;
2983 }
2984 return -EINVAL;
2985}
2986DRIVER_ATTR(no_lun_0, S_IRUGO | S_IWUSR, sdebug_no_lun_0_show,
2987 sdebug_no_lun_0_store);
2988
1da177e4
LT		 2989static ssize_t sdebug_num_tgts_show(struct device_driver * ddp, char * buf)
2990{
2991 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts);
2992}
2993static ssize_t sdebug_num_tgts_store(struct device_driver * ddp,
2994 const char * buf, size_t count)
2995{
2996 int n;
2997
2998 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2999 scsi_debug_num_tgts = n;
3000 sdebug_max_tgts_luns();
3001 return count;
3002 }
3003 return -EINVAL;
3004}
3005DRIVER_ATTR(num_tgts, S_IRUGO | S_IWUSR, sdebug_num_tgts_show,
3006 sdebug_num_tgts_store);
3007
3008static ssize_t sdebug_dev_size_mb_show(struct device_driver * ddp, char * buf)
3009{
3010 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb);
3011}
3012DRIVER_ATTR(dev_size_mb, S_IRUGO, sdebug_dev_size_mb_show, NULL);
3013
3014static ssize_t sdebug_num_parts_show(struct device_driver * ddp, char * buf)
3015{
3016 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts);
3017}
3018DRIVER_ATTR(num_parts, S_IRUGO, sdebug_num_parts_show, NULL);
3019
3020static ssize_t sdebug_every_nth_show(struct device_driver * ddp, char * buf)
3021{
3022 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth);
3023}
3024static ssize_t sdebug_every_nth_store(struct device_driver * ddp,
3025 const char * buf, size_t count)
3026{
3027 int nth;
3028
3029 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
3030 scsi_debug_every_nth = nth;
3031 scsi_debug_cmnd_count = 0;
3032 return count;
3033 }
3034 return -EINVAL;
3035}
3036DRIVER_ATTR(every_nth, S_IRUGO | S_IWUSR, sdebug_every_nth_show,
3037 sdebug_every_nth_store);
3038
3039static ssize_t sdebug_max_luns_show(struct device_driver * ddp, char * buf)
3040{
3041 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns);
3042}
3043static ssize_t sdebug_max_luns_store(struct device_driver * ddp,
3044 const char * buf, size_t count)
3045{
3046 int n;
3047
3048 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3049 scsi_debug_max_luns = n;
3050 sdebug_max_tgts_luns();
3051 return count;
3052 }
3053 return -EINVAL;
3054}
3055DRIVER_ATTR(max_luns, S_IRUGO | S_IWUSR, sdebug_max_luns_show,
3056 sdebug_max_luns_store);
3057
78d4e5a0
DG		 3058static ssize_t sdebug_max_queue_show(struct device_driver * ddp, char * buf)
3059{
3060 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_queue);
3061}
3062static ssize_t sdebug_max_queue_store(struct device_driver * ddp,
3063 const char * buf, size_t count)
3064{
3065 int n;
3066
3067 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
3068 (n <= SCSI_DEBUG_CANQUEUE)) {
3069 scsi_debug_max_queue = n;
3070 return count;
3071 }
3072 return -EINVAL;
3073}
3074DRIVER_ATTR(max_queue, S_IRUGO | S_IWUSR, sdebug_max_queue_show,
3075 sdebug_max_queue_store);
3076
3077static ssize_t sdebug_no_uld_show(struct device_driver * ddp, char * buf)
3078{
3079 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_uld);
3080}
3081DRIVER_ATTR(no_uld, S_IRUGO, sdebug_no_uld_show, NULL);
3082
1da177e4
LT		 3083static ssize_t sdebug_scsi_level_show(struct device_driver * ddp, char * buf)
3084{
3085 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level);
3086}
3087DRIVER_ATTR(scsi_level, S_IRUGO, sdebug_scsi_level_show, NULL);
3088
c65b1445
DG		 3089static ssize_t sdebug_virtual_gb_show(struct device_driver * ddp, char * buf)
3090{
3091 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb);
3092}
3093static ssize_t sdebug_virtual_gb_store(struct device_driver * ddp,
3094 const char * buf, size_t count)
3095{
3096 int n;
3097
3098 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3099 scsi_debug_virtual_gb = n;
28898873
FT		 3100
3101 sdebug_capacity = get_sdebug_capacity();
3102
c65b1445
DG		 3103 return count;
3104 }
3105 return -EINVAL;
3106}
3107DRIVER_ATTR(virtual_gb, S_IRUGO | S_IWUSR, sdebug_virtual_gb_show,
3108 sdebug_virtual_gb_store);
3109
1da177e4
LT		 3110static ssize_t sdebug_add_host_show(struct device_driver * ddp, char * buf)
3111{
3112 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host);
3113}
3114
3115static ssize_t sdebug_add_host_store(struct device_driver * ddp,
3116 const char * buf, size_t count)
3117{
f3df41cf 3118 int delta_hosts;
1da177e4 3119
f3df41cf 3120 if (sscanf(buf, "%d", &delta_hosts) != 1)
1da177e4 3121 return -EINVAL;
1da177e4
LT		 3122 if (delta_hosts > 0) {
3123 do {
3124 sdebug_add_adapter();
3125 } while (--delta_hosts);
3126 } else if (delta_hosts < 0) {
3127 do {
3128 sdebug_remove_adapter();
3129 } while (++delta_hosts);
3130 }
3131 return count;
3132}
f3df41cf 3133DRIVER_ATTR(add_host, S_IRUGO | S_IWUSR, sdebug_add_host_show,
1da177e4
LT		 3134 sdebug_add_host_store);
3135
23183910
DG		 3136static ssize_t sdebug_vpd_use_hostno_show(struct device_driver * ddp,
3137 char * buf)
3138{
3139 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_vpd_use_hostno);
3140}
3141static ssize_t sdebug_vpd_use_hostno_store(struct device_driver * ddp,
3142 const char * buf, size_t count)
3143{
3144 int n;
3145
3146 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3147 scsi_debug_vpd_use_hostno = n;
3148 return count;
3149 }
3150 return -EINVAL;
3151}
3152DRIVER_ATTR(vpd_use_hostno, S_IRUGO | S_IWUSR, sdebug_vpd_use_hostno_show,
3153 sdebug_vpd_use_hostno_store);
3154
597136ab
MP		 3155static ssize_t sdebug_sector_size_show(struct device_driver * ddp, char * buf)
3156{
3157 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size);
3158}
3159DRIVER_ATTR(sector_size, S_IRUGO, sdebug_sector_size_show, NULL);
3160
c6a44287
MP		 3161static ssize_t sdebug_dix_show(struct device_driver *ddp, char *buf)
3162{
3163 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix);
3164}
3165DRIVER_ATTR(dix, S_IRUGO, sdebug_dix_show, NULL);
3166
3167static ssize_t sdebug_dif_show(struct device_driver *ddp, char *buf)
3168{
3169 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif);
3170}
3171DRIVER_ATTR(dif, S_IRUGO, sdebug_dif_show, NULL);
3172
3173static ssize_t sdebug_guard_show(struct device_driver *ddp, char *buf)
3174{
3175 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_guard);
3176}
3177DRIVER_ATTR(guard, S_IRUGO, sdebug_guard_show, NULL);
3178
3179static ssize_t sdebug_ato_show(struct device_driver *ddp, char *buf)
3180{
3181 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato);
3182}
3183DRIVER_ATTR(ato, S_IRUGO, sdebug_ato_show, NULL);
3184
44d92694
MP		 3185static ssize_t sdebug_map_show(struct device_driver *ddp, char *buf)
3186{
3187 ssize_t count;
3188
5b94e232 3189 if (!scsi_debug_lbp())
44d92694
MP		 3190 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
3191 sdebug_store_sectors);
3192
3193 count = bitmap_scnlistprintf(buf, PAGE_SIZE, map_storep, map_size);
3194
3195 buf[count++] = '\n';
3196 buf[count++] = 0;
3197
3198 return count;
3199}
3200DRIVER_ATTR(map, S_IRUGO, sdebug_map_show, NULL);
3201
d986788b
MP		 3202static ssize_t sdebug_removable_show(struct device_driver *ddp,
3203 char *buf)
3204{
3205 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_removable ? 1 : 0);
3206}
3207static ssize_t sdebug_removable_store(struct device_driver *ddp,
3208 const char *buf, size_t count)
3209{
3210 int n;
3211
3212 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3213 scsi_debug_removable = (n > 0);
3214 return count;
3215 }
3216 return -EINVAL;
3217}
3218DRIVER_ATTR(removable, S_IRUGO | S_IWUSR, sdebug_removable_show,
3219 sdebug_removable_store);
3220
c6a44287 3221
23183910
DG		 3222/* Note: The following function creates attribute files in the
3223 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
3224 files (over those found in the /sys/module/scsi_debug/parameters
3225 directory) is that auxiliary actions can be triggered when an attribute
3226 is changed. For example see: sdebug_add_host_store() above.
3227 */
6ecaff7f 3228static int do_create_driverfs_files(void)
1da177e4 3229{
6ecaff7f
RD		 3230 int ret;
3231
3232 ret = driver_create_file(&sdebug_driverfs_driver, &driver_attr_add_host);
3233 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_delay);
3234 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb);
3235 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dsense);
3236 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_every_nth);
23183910 3237 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_fake_rw);
6ecaff7f 3238 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_luns);
78d4e5a0 3239 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_queue);
23183910 3240 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_no_lun_0);
78d4e5a0 3241 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_no_uld);
6ecaff7f 3242 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_parts);
23183910 3243 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_tgts);
6ecaff7f
RD		 3244 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ptype);
3245 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_opts);
d986788b 3246 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_removable);
6ecaff7f 3247 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_scsi_level);
23183910
DG		 3248 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb);
3249 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno);
597136ab 3250 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_sector_size);
c6a44287
MP		 3251 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dix);
3252 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dif);
3253 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_guard);
3254 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ato);
44d92694 3255 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_map);
6ecaff7f 3256 return ret;
1da177e4
LT		 3257}
3258
3259static void do_remove_driverfs_files(void)
3260{
44d92694 3261 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_map);
c6a44287
MP		 3262 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ato);
3263 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_guard);
3264 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dif);
3265 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dix);
597136ab 3266 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_sector_size);
23183910
DG		 3267 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno);
3268 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb);
1da177e4
LT		 3269 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_scsi_level);
3270 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_opts);
3271 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ptype);
d986788b 3272 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_removable);
1da177e4 3273 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_tgts);
23183910 3274 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_parts);
78d4e5a0 3275 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_no_uld);
23183910 3276 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_no_lun_0);
78d4e5a0 3277 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_queue);
1da177e4 3278 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_luns);
23183910 3279 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_fake_rw);
1da177e4
LT		 3280 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_every_nth);
3281 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dsense);
3282 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb);
3283 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_delay);
3284 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_add_host);
3285}
3286
9b906779 3287struct device *pseudo_primary;
8dea0d02 3288
1da177e4
LT		 3289static int __init scsi_debug_init(void)
3290{
5f2578e5 3291 unsigned long sz;
1da177e4
LT		 3292 int host_to_add;
3293 int k;
6ecaff7f 3294 int ret;
1da177e4 3295
597136ab
MP		 3296 switch (scsi_debug_sector_size) {
3297 case 512:
3298 case 1024:
3299 case 2048:
3300 case 4096:
3301 break;
3302 default:
c6a44287 3303 printk(KERN_ERR "scsi_debug_init: invalid sector_size %d\n",
597136ab
MP		 3304 scsi_debug_sector_size);
3305 return -EINVAL;
3306 }
3307
c6a44287
MP		 3308 switch (scsi_debug_dif) {
3309
3310 case SD_DIF_TYPE0_PROTECTION:
3311 case SD_DIF_TYPE1_PROTECTION:
395cef03 3312 case SD_DIF_TYPE2_PROTECTION:
c6a44287
MP		 3313 case SD_DIF_TYPE3_PROTECTION:
3314 break;
3315
3316 default:
395cef03 3317 printk(KERN_ERR "scsi_debug_init: dif must be 0, 1, 2 or 3\n");
c6a44287
MP		 3318 return -EINVAL;
3319 }
3320
3321 if (scsi_debug_guard > 1) {
3322 printk(KERN_ERR "scsi_debug_init: guard must be 0 or 1\n");
3323 return -EINVAL;
3324 }
3325
3326 if (scsi_debug_ato > 1) {
3327 printk(KERN_ERR "scsi_debug_init: ato must be 0 or 1\n");
3328 return -EINVAL;
3329 }
3330
ea61fca5
MP		 3331 if (scsi_debug_physblk_exp > 15) {
3332 printk(KERN_ERR "scsi_debug_init: invalid physblk_exp %u\n",
3333 scsi_debug_physblk_exp);
3334 return -EINVAL;
3335 }
3336
3337 if (scsi_debug_lowest_aligned > 0x3fff) {
3338 printk(KERN_ERR "scsi_debug_init: lowest_aligned too big: %u\n",
3339 scsi_debug_lowest_aligned);
3340 return -EINVAL;
3341 }
3342
1da177e4
LT		 3343 if (scsi_debug_dev_size_mb < 1)
3344 scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
5f2578e5 3345 sz = (unsigned long)scsi_debug_dev_size_mb * 1048576;
597136ab 3346 sdebug_store_sectors = sz / scsi_debug_sector_size;
28898873 3347 sdebug_capacity = get_sdebug_capacity();
1da177e4
LT		 3348
3349 /* play around with geometry, don't waste too much on track 0 */
3350 sdebug_heads = 8;
3351 sdebug_sectors_per = 32;
3352 if (scsi_debug_dev_size_mb >= 16)
3353 sdebug_heads = 32;
3354 else if (scsi_debug_dev_size_mb >= 256)
3355 sdebug_heads = 64;
3356 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
3357 (sdebug_sectors_per * sdebug_heads);
3358 if (sdebug_cylinders_per >= 1024) {
3359 /* other LLDs do this; implies >= 1GB ram disk ... */
3360 sdebug_heads = 255;
3361 sdebug_sectors_per = 63;
3362 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
3363 (sdebug_sectors_per * sdebug_heads);
3364 }
3365
1da177e4
LT		 3366 fake_storep = vmalloc(sz);
3367 if (NULL == fake_storep) {
3368 printk(KERN_ERR "scsi_debug_init: out of memory, 1\n");
3369 return -ENOMEM;
3370 }
3371 memset(fake_storep, 0, sz);
3372 if (scsi_debug_num_parts > 0)
f58b0efb 3373 sdebug_build_parts(fake_storep, sz);
1da177e4 3374
7cb69d03 3375 if (scsi_debug_dix) {
c6a44287
MP		 3376 int dif_size;
3377
3378 dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple);
3379 dif_storep = vmalloc(dif_size);
3380
3381 printk(KERN_ERR "scsi_debug_init: dif_storep %u bytes @ %p\n",
3382 dif_size, dif_storep);
3383
3384 if (dif_storep == NULL) {
3385 printk(KERN_ERR "scsi_debug_init: out of mem. (DIX)\n");
3386 ret = -ENOMEM;
3387 goto free_vm;
3388 }
3389
3390 memset(dif_storep, 0xff, dif_size);
3391 }
3392
5b94e232
MP		 3393 /* Logical Block Provisioning */
3394 if (scsi_debug_lbp()) {
6014759c
MP		 3395 scsi_debug_unmap_max_blocks =
3396 clamp(scsi_debug_unmap_max_blocks, 0U, 0xffffffffU);
3397
3398 scsi_debug_unmap_max_desc =
3399 clamp(scsi_debug_unmap_max_desc, 0U, 256U);
3400
3401 scsi_debug_unmap_granularity =
3402 clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU);
3403
3404 if (scsi_debug_unmap_alignment &&
ac17078a
AM		 3405 scsi_debug_unmap_granularity <=
3406 scsi_debug_unmap_alignment) {
44d92694 3407 printk(KERN_ERR
ac17078a 3408 "%s: ERR: unmap_granularity <= unmap_alignment\n",
44d92694
MP		 3409 __func__);
3410 return -EINVAL;
3411 }
3412
b90ebc3d
AM		 3413 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
3414 map_storep = vmalloc(BITS_TO_LONGS(map_size) * sizeof(long));
44d92694
MP		 3415
3416 printk(KERN_INFO "scsi_debug_init: %lu provisioning blocks\n",
3417 map_size);
3418
3419 if (map_storep == NULL) {
3420 printk(KERN_ERR "scsi_debug_init: out of mem. (MAP)\n");
3421 ret = -ENOMEM;
3422 goto free_vm;
3423 }
3424
b90ebc3d 3425 bitmap_zero(map_storep, map_size);
44d92694
MP		 3426
3427 /* Map first 1KB for partition table */
3428 if (scsi_debug_num_parts)
3429 map_region(0, 2);
3430 }
3431
9b906779
NB		 3432 pseudo_primary = root_device_register("pseudo_0");
3433 if (IS_ERR(pseudo_primary)) {
3434 printk(KERN_WARNING "scsi_debug: root_device_register() error\n");
3435 ret = PTR_ERR(pseudo_primary);
6ecaff7f
RD		 3436 goto free_vm;
3437 }
3438 ret = bus_register(&pseudo_lld_bus);
3439 if (ret < 0) {
3440 printk(KERN_WARNING "scsi_debug: bus_register error: %d\n",
3441 ret);
3442 goto dev_unreg;
3443 }
3444 ret = driver_register(&sdebug_driverfs_driver);
3445 if (ret < 0) {
3446 printk(KERN_WARNING "scsi_debug: driver_register error: %d\n",
3447 ret);
3448 goto bus_unreg;
3449 }
3450 ret = do_create_driverfs_files();
3451 if (ret < 0) {
3452 printk(KERN_WARNING "scsi_debug: driver_create_file error: %d\n",
3453 ret);
3454 goto del_files;
3455 }
1da177e4 3456
6ecaff7f 3457 init_all_queued();
1da177e4 3458
1da177e4
LT		 3459 host_to_add = scsi_debug_add_host;
3460 scsi_debug_add_host = 0;
3461
3462 for (k = 0; k < host_to_add; k++) {
3463 if (sdebug_add_adapter()) {
3464 printk(KERN_ERR "scsi_debug_init: "
3465 "sdebug_add_adapter failed k=%d\n", k);
3466 break;
3467 }
3468 }
3469
3470 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
3471 printk(KERN_INFO "scsi_debug_init: built %d host(s)\n",
3472 scsi_debug_add_host);
3473 }
3474 return 0;
6ecaff7f
RD		 3475
3476del_files:
3477 do_remove_driverfs_files();
3478 driver_unregister(&sdebug_driverfs_driver);
3479bus_unreg:
3480 bus_unregister(&pseudo_lld_bus);
3481dev_unreg:
9b906779 3482 root_device_unregister(pseudo_primary);
6ecaff7f 3483free_vm:
44d92694
MP		 3484 if (map_storep)
3485 vfree(map_storep);
c6a44287
MP		 3486 if (dif_storep)
3487 vfree(dif_storep);
6ecaff7f
RD		 3488 vfree(fake_storep);
3489
3490 return ret;
1da177e4
LT		 3491}
3492
3493static void __exit scsi_debug_exit(void)
3494{
3495 int k = scsi_debug_add_host;
3496
3497 stop_all_queued();
3498 for (; k; k--)
3499 sdebug_remove_adapter();
3500 do_remove_driverfs_files();
3501 driver_unregister(&sdebug_driverfs_driver);
3502 bus_unregister(&pseudo_lld_bus);
9b906779 3503 root_device_unregister(pseudo_primary);
1da177e4 3504
c6a44287
MP		 3505 if (dif_storep)
3506 vfree(dif_storep);
3507
1da177e4
LT		 3508 vfree(fake_storep);
3509}
3510
3511device_initcall(scsi_debug_init);
3512module_exit(scsi_debug_exit);
3513
1da177e4
LT		 3514static void sdebug_release_adapter(struct device * dev)
3515{
3516 struct sdebug_host_info *sdbg_host;
3517
3518 sdbg_host = to_sdebug_host(dev);
3519 kfree(sdbg_host);
3520}
3521
3522static int sdebug_add_adapter(void)
3523{
3524 int k, devs_per_host;
3525 int error = 0;
3526 struct sdebug_host_info *sdbg_host;
8b40228f 3527 struct sdebug_dev_info *sdbg_devinfo, *tmp;
1da177e4 3528
c65b1445 3529 sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL);
1da177e4
LT		 3530 if (NULL == sdbg_host) {
3531 printk(KERN_ERR "%s: out of memory at line %d\n",
cadbd4a5 3532 __func__, __LINE__);
1da177e4
LT		 3533 return -ENOMEM;
3534 }
3535
1da177e4
LT		 3536 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
3537
3538 devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns;
3539 for (k = 0; k < devs_per_host; k++) {
5cb2fc06
FT		 3540 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
3541 if (!sdbg_devinfo) {
1da177e4 3542 printk(KERN_ERR "%s: out of memory at line %d\n",
cadbd4a5 3543 __func__, __LINE__);
1da177e4
LT		 3544 error = -ENOMEM;
3545 goto clean;
3546 }
1da177e4
LT		 3547 }
3548
3549 spin_lock(&sdebug_host_list_lock);
3550 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
3551 spin_unlock(&sdebug_host_list_lock);
3552
3553 sdbg_host->dev.bus = &pseudo_lld_bus;
9b906779 3554 sdbg_host->dev.parent = pseudo_primary;
1da177e4 3555 sdbg_host->dev.release = &sdebug_release_adapter;
71610f55 3556 dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host);
1da177e4
LT		 3557
3558 error = device_register(&sdbg_host->dev);
3559
3560 if (error)
3561 goto clean;
3562
3563 ++scsi_debug_add_host;
3564 return error;
3565
3566clean:
8b40228f
FT		 3567 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
3568 dev_list) {
1da177e4
LT		 3569 list_del(&sdbg_devinfo->dev_list);
3570 kfree(sdbg_devinfo);
3571 }
3572
3573 kfree(sdbg_host);
3574 return error;
3575}
3576
3577static void sdebug_remove_adapter(void)
3578{
3579 struct sdebug_host_info * sdbg_host = NULL;
3580
3581 spin_lock(&sdebug_host_list_lock);
3582 if (!list_empty(&sdebug_host_list)) {
3583 sdbg_host = list_entry(sdebug_host_list.prev,
3584 struct sdebug_host_info, host_list);
3585 list_del(&sdbg_host->host_list);
3586 }
3587 spin_unlock(&sdebug_host_list_lock);
3588
3589 if (!sdbg_host)
3590 return;
3591
3592 device_unregister(&sdbg_host->dev);
3593 --scsi_debug_add_host;
3594}
3595
639db475 3596static
f281233d 3597int scsi_debug_queuecommand_lck(struct scsi_cmnd *SCpnt, done_funct_t done)
639db475
FT		 3598{
3599 unsigned char *cmd = (unsigned char *) SCpnt->cmnd;
3600 int len, k;
3601 unsigned int num;
3602 unsigned long long lba;
395cef03 3603 u32 ei_lba;
639db475
FT		 3604 int errsts = 0;
3605 int target = SCpnt->device->id;
3606 struct sdebug_dev_info *devip = NULL;
3607 int inj_recovered = 0;
3608 int inj_transport = 0;
c6a44287
MP		 3609 int inj_dif = 0;
3610 int inj_dix = 0;
639db475 3611 int delay_override = 0;
44d92694 3612 int unmap = 0;
639db475
FT		 3613
3614 scsi_set_resid(SCpnt, 0);
3615 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmd) {
3616 printk(KERN_INFO "scsi_debug: cmd ");
3617 for (k = 0, len = SCpnt->cmd_len; k < len; ++k)
3618 printk("%02x ", (int)cmd[k]);
3619 printk("\n");
3620 }
3621
3622 if (target == SCpnt->device->host->hostt->this_id) {
3623 printk(KERN_INFO "scsi_debug: initiator's id used as "
3624 "target!\n");
3625 return schedule_resp(SCpnt, NULL, done,
3626 DID_NO_CONNECT << 16, 0);
3627 }
3628
3629 if ((SCpnt->device->lun >= scsi_debug_max_luns) &&
3630 (SCpnt->device->lun != SAM2_WLUN_REPORT_LUNS))
3631 return schedule_resp(SCpnt, NULL, done,
3632 DID_NO_CONNECT << 16, 0);
3633 devip = devInfoReg(SCpnt->device);
3634 if (NULL == devip)
3635 return schedule_resp(SCpnt, NULL, done,
3636 DID_NO_CONNECT << 16, 0);
3637
3638 if ((scsi_debug_every_nth != 0) &&
3639 (++scsi_debug_cmnd_count >= abs(scsi_debug_every_nth))) {
3640 scsi_debug_cmnd_count = 0;
3641 if (scsi_debug_every_nth < -1)
3642 scsi_debug_every_nth = -1;
3643 if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts)
3644 return 0; /* ignore command causing timeout */
18a4d0a2
MP		 3645 else if (SCSI_DEBUG_OPT_MAC_TIMEOUT & scsi_debug_opts &&
3646 scsi_medium_access_command(SCpnt))
3647 return 0; /* time out reads and writes */
639db475
FT		 3648 else if (SCSI_DEBUG_OPT_RECOVERED_ERR & scsi_debug_opts)
3649 inj_recovered = 1; /* to reads and writes below */
3650 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & scsi_debug_opts)
3651 inj_transport = 1; /* to reads and writes below */
c6a44287
MP		 3652 else if (SCSI_DEBUG_OPT_DIF_ERR & scsi_debug_opts)
3653 inj_dif = 1; /* to reads and writes below */
3654 else if (SCSI_DEBUG_OPT_DIX_ERR & scsi_debug_opts)
3655 inj_dix = 1; /* to reads and writes below */
639db475
FT		 3656 }
3657
3658 if (devip->wlun) {
3659 switch (*cmd) {
3660 case INQUIRY:
3661 case REQUEST_SENSE:
3662 case TEST_UNIT_READY:
3663 case REPORT_LUNS:
3664 break; /* only allowable wlun commands */
3665 default:
3666 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3667 printk(KERN_INFO "scsi_debug: Opcode: 0x%x "
3668 "not supported for wlun\n", *cmd);
3669 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3670 INVALID_OPCODE, 0);
3671 errsts = check_condition_result;
3672 return schedule_resp(SCpnt, devip, done, errsts,
3673 0);
3674 }
3675 }
3676
3677 switch (*cmd) {
3678 case INQUIRY: /* mandatory, ignore unit attention */
3679 delay_override = 1;
3680 errsts = resp_inquiry(SCpnt, target, devip);
3681 break;
3682 case REQUEST_SENSE: /* mandatory, ignore unit attention */
3683 delay_override = 1;
3684 errsts = resp_requests(SCpnt, devip);
3685 break;
3686 case REZERO_UNIT: /* actually this is REWIND for SSC */
3687 case START_STOP:
3688 errsts = resp_start_stop(SCpnt, devip);
3689 break;
3690 case ALLOW_MEDIUM_REMOVAL:
3691 errsts = check_readiness(SCpnt, 1, devip);
3692 if (errsts)
3693 break;
3694 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3695 printk(KERN_INFO "scsi_debug: Medium removal %s\n",
3696 cmd[4] ? "inhibited" : "enabled");
3697 break;
3698 case SEND_DIAGNOSTIC: /* mandatory */
3699 errsts = check_readiness(SCpnt, 1, devip);
3700 break;
3701 case TEST_UNIT_READY: /* mandatory */
3702 delay_override = 1;
3703 errsts = check_readiness(SCpnt, 0, devip);
3704 break;
3705 case RESERVE:
3706 errsts = check_readiness(SCpnt, 1, devip);
3707 break;
3708 case RESERVE_10:
3709 errsts = check_readiness(SCpnt, 1, devip);
3710 break;
3711 case RELEASE:
3712 errsts = check_readiness(SCpnt, 1, devip);
3713 break;
3714 case RELEASE_10:
3715 errsts = check_readiness(SCpnt, 1, devip);
3716 break;
3717 case READ_CAPACITY:
3718 errsts = resp_readcap(SCpnt, devip);
3719 break;
3720 case SERVICE_ACTION_IN:
44d92694
MP		 3721 if (cmd[1] == SAI_READ_CAPACITY_16)
3722 errsts = resp_readcap16(SCpnt, devip);
3723 else if (cmd[1] == SAI_GET_LBA_STATUS) {
3724
5b94e232 3725 if (scsi_debug_lbp() == 0) {
44d92694
MP		 3726 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3727 INVALID_COMMAND_OPCODE, 0);
3728 errsts = check_condition_result;
3729 } else
3730 errsts = resp_get_lba_status(SCpnt, devip);
3731 } else {
639db475
FT		 3732 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3733 INVALID_OPCODE, 0);
3734 errsts = check_condition_result;
639db475 3735 }
639db475
FT		 3736 break;
3737 case MAINTENANCE_IN:
3738 if (MI_REPORT_TARGET_PGS != cmd[1]) {
3739 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3740 INVALID_OPCODE, 0);
3741 errsts = check_condition_result;
3742 break;
3743 }
3744 errsts = resp_report_tgtpgs(SCpnt, devip);
3745 break;
3746 case READ_16:
3747 case READ_12:
3748 case READ_10:
395cef03
MP		 3749 /* READ{10,12,16} and DIF Type 2 are natural enemies */
3750 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
3751 cmd[1] & 0xe0) {
3752 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3753 INVALID_COMMAND_OPCODE, 0);
3754 errsts = check_condition_result;
3755 break;
3756 }
3757
3758 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
3759 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
3760 (cmd[1] & 0xe0) == 0)
3761 printk(KERN_ERR "Unprotected RD/WR to DIF device\n");
3762
3763 /* fall through */
639db475 3764 case READ_6:
395cef03 3765read:
639db475
FT		 3766 errsts = check_readiness(SCpnt, 0, devip);
3767 if (errsts)
3768 break;
3769 if (scsi_debug_fake_rw)
3770 break;
395cef03
MP		 3771 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3772 errsts = resp_read(SCpnt, lba, num, devip, ei_lba);
639db475
FT		 3773 if (inj_recovered && (0 == errsts)) {
3774 mk_sense_buffer(devip, RECOVERED_ERROR,
3775 THRESHOLD_EXCEEDED, 0);
3776 errsts = check_condition_result;
3777 } else if (inj_transport && (0 == errsts)) {
3778 mk_sense_buffer(devip, ABORTED_COMMAND,
3779 TRANSPORT_PROBLEM, ACK_NAK_TO);
3780 errsts = check_condition_result;
c6a44287
MP		 3781 } else if (inj_dif && (0 == errsts)) {
3782 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1);
3783 errsts = illegal_condition_result;
3784 } else if (inj_dix && (0 == errsts)) {
3785 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1);
3786 errsts = illegal_condition_result;
639db475
FT		 3787 }
3788 break;
3789 case REPORT_LUNS: /* mandatory, ignore unit attention */
3790 delay_override = 1;
3791 errsts = resp_report_luns(SCpnt, devip);
3792 break;
3793 case VERIFY: /* 10 byte SBC-2 command */
3794 errsts = check_readiness(SCpnt, 0, devip);
3795 break;
3796 case WRITE_16:
3797 case WRITE_12:
3798 case WRITE_10:
395cef03
MP		 3799 /* WRITE{10,12,16} and DIF Type 2 are natural enemies */
3800 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
3801 cmd[1] & 0xe0) {
3802 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3803 INVALID_COMMAND_OPCODE, 0);
3804 errsts = check_condition_result;
3805 break;
3806 }
3807
3808 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
3809 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
3810 (cmd[1] & 0xe0) == 0)
3811 printk(KERN_ERR "Unprotected RD/WR to DIF device\n");
3812
3813 /* fall through */
639db475 3814 case WRITE_6:
395cef03 3815write:
639db475
FT		 3816 errsts = check_readiness(SCpnt, 0, devip);
3817 if (errsts)
3818 break;
3819 if (scsi_debug_fake_rw)
3820 break;
395cef03
MP		 3821 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3822 errsts = resp_write(SCpnt, lba, num, devip, ei_lba);
639db475
FT		 3823 if (inj_recovered && (0 == errsts)) {
3824 mk_sense_buffer(devip, RECOVERED_ERROR,
3825 THRESHOLD_EXCEEDED, 0);
3826 errsts = check_condition_result;
c6a44287
MP		 3827 } else if (inj_dif && (0 == errsts)) {
3828 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1);
3829 errsts = illegal_condition_result;
3830 } else if (inj_dix && (0 == errsts)) {
3831 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1);
3832 errsts = illegal_condition_result;
639db475
FT		 3833 }
3834 break;
44d92694 3835 case WRITE_SAME_16:
5b94e232 3836 case WRITE_SAME:
6014759c 3837 if (cmd[1] & 0x8) {
5b94e232
MP		 3838 if ((*cmd == WRITE_SAME_16 && scsi_debug_lbpws == 0) ||
3839 (*cmd == WRITE_SAME && scsi_debug_lbpws10 == 0)) {
6014759c
MP		 3840 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3841 INVALID_FIELD_IN_CDB, 0);
3842 errsts = check_condition_result;
3843 } else
3844 unmap = 1;
3845 }
3846 if (errsts)
3847 break;
44d92694
MP		 3848 errsts = check_readiness(SCpnt, 0, devip);
3849 if (errsts)
3850 break;
3851 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3852 errsts = resp_write_same(SCpnt, lba, num, devip, ei_lba, unmap);
3853 break;
3854 case UNMAP:
3855 errsts = check_readiness(SCpnt, 0, devip);
3856 if (errsts)
3857 break;
3858
5b94e232 3859 if (scsi_debug_unmap_max_desc == 0 || scsi_debug_lbpu == 0) {
44d92694
MP		 3860 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3861 INVALID_COMMAND_OPCODE, 0);
3862 errsts = check_condition_result;
3863 } else
3864 errsts = resp_unmap(SCpnt, devip);
3865 break;
639db475
FT		 3866 case MODE_SENSE:
3867 case MODE_SENSE_10:
3868 errsts = resp_mode_sense(SCpnt, target, devip);
3869 break;
3870 case MODE_SELECT:
3871 errsts = resp_mode_select(SCpnt, 1, devip);
3872 break;
3873 case MODE_SELECT_10:
3874 errsts = resp_mode_select(SCpnt, 0, devip);
3875 break;
3876 case LOG_SENSE:
3877 errsts = resp_log_sense(SCpnt, devip);
3878 break;
3879 case SYNCHRONIZE_CACHE:
3880 delay_override = 1;
3881 errsts = check_readiness(SCpnt, 0, devip);
3882 break;
3883 case WRITE_BUFFER:
3884 errsts = check_readiness(SCpnt, 1, devip);
3885 break;
3886 case XDWRITEREAD_10:
3887 if (!scsi_bidi_cmnd(SCpnt)) {
3888 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3889 INVALID_FIELD_IN_CDB, 0);
3890 errsts = check_condition_result;
3891 break;
3892 }
3893
3894 errsts = check_readiness(SCpnt, 0, devip);
3895 if (errsts)
3896 break;
3897 if (scsi_debug_fake_rw)
3898 break;
395cef03
MP		 3899 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3900 errsts = resp_read(SCpnt, lba, num, devip, ei_lba);
639db475
FT		 3901 if (errsts)
3902 break;
395cef03 3903 errsts = resp_write(SCpnt, lba, num, devip, ei_lba);
639db475
FT		 3904 if (errsts)
3905 break;
3906 errsts = resp_xdwriteread(SCpnt, lba, num, devip);
3907 break;
395cef03
MP		 3908 case VARIABLE_LENGTH_CMD:
3909 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION) {
3910
3911 if ((cmd[10] & 0xe0) == 0)
3912 printk(KERN_ERR
3913 "Unprotected RD/WR to DIF device\n");
3914
3915 if (cmd[9] == READ_32) {
3916 BUG_ON(SCpnt->cmd_len < 32);
3917 goto read;
3918 }
3919
3920 if (cmd[9] == WRITE_32) {
3921 BUG_ON(SCpnt->cmd_len < 32);
3922 goto write;
3923 }
3924 }
3925
3926 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3927 INVALID_FIELD_IN_CDB, 0);
3928 errsts = check_condition_result;
3929 break;
3930
639db475
FT		 3931 default:
3932 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3933 printk(KERN_INFO "scsi_debug: Opcode: 0x%x not "
3934 "supported\n", *cmd);
3935 errsts = check_readiness(SCpnt, 1, devip);
3936 if (errsts)
3937 break; /* Unit attention takes precedence */
3938 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
3939 errsts = check_condition_result;
3940 break;
3941 }
3942 return schedule_resp(SCpnt, devip, done, errsts,
3943 (delay_override ? 0 : scsi_debug_delay));
3944}
3945
f281233d
JG		 3946static DEF_SCSI_QCMD(scsi_debug_queuecommand)
3947
9e603ca0 3948static struct scsi_host_template sdebug_driver_template = {
c8ed555a
AV		 3949 .show_info = scsi_debug_show_info,
3950 .write_info = scsi_debug_write_info,
9e603ca0
FT		 3951 .proc_name = sdebug_proc_name,
3952 .name = "SCSI DEBUG",
3953 .info = scsi_debug_info,
3954 .slave_alloc = scsi_debug_slave_alloc,
3955 .slave_configure = scsi_debug_slave_configure,
3956 .slave_destroy = scsi_debug_slave_destroy,
3957 .ioctl = scsi_debug_ioctl,
3958 .queuecommand = scsi_debug_queuecommand,
3959 .eh_abort_handler = scsi_debug_abort,
3960 .eh_bus_reset_handler = scsi_debug_bus_reset,
3961 .eh_device_reset_handler = scsi_debug_device_reset,
3962 .eh_host_reset_handler = scsi_debug_host_reset,
3963 .bios_param = scsi_debug_biosparam,
3964 .can_queue = SCSI_DEBUG_CANQUEUE,
3965 .this_id = 7,
3966 .sg_tablesize = 256,
3967 .cmd_per_lun = 16,
3968 .max_sectors = 0xffff,
3969 .use_clustering = DISABLE_CLUSTERING,
3970 .module = THIS_MODULE,
3971};
3972
1da177e4
LT		 3973static int sdebug_driver_probe(struct device * dev)
3974{
3975 int error = 0;
3976 struct sdebug_host_info *sdbg_host;
3977 struct Scsi_Host *hpnt;
c6a44287 3978 int host_prot;
1da177e4
LT		 3979
3980 sdbg_host = to_sdebug_host(dev);
3981
78d4e5a0
DG		 3982 sdebug_driver_template.can_queue = scsi_debug_max_queue;
3983 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
3984 if (NULL == hpnt) {
3985 printk(KERN_ERR "%s: scsi_register failed\n", __func__);
3986 error = -ENODEV;
1da177e4 3987 return error;
78d4e5a0 3988 }
1da177e4
LT		 3989
3990 sdbg_host->shost = hpnt;
3991 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
3992 if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id))
3993 hpnt->max_id = scsi_debug_num_tgts + 1;
3994 else
3995 hpnt->max_id = scsi_debug_num_tgts;
c65b1445 3996 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; /* = scsi_debug_max_luns; */
1da177e4 3997
c6a44287
MP		 3998 host_prot = 0;
3999
4000 switch (scsi_debug_dif) {
4001
4002 case SD_DIF_TYPE1_PROTECTION:
4003 host_prot = SHOST_DIF_TYPE1_PROTECTION;
4004 if (scsi_debug_dix)
4005 host_prot |= SHOST_DIX_TYPE1_PROTECTION;
4006 break;
4007
4008 case SD_DIF_TYPE2_PROTECTION:
4009 host_prot = SHOST_DIF_TYPE2_PROTECTION;
4010 if (scsi_debug_dix)
4011 host_prot |= SHOST_DIX_TYPE2_PROTECTION;
4012 break;
4013
4014 case SD_DIF_TYPE3_PROTECTION:
4015 host_prot = SHOST_DIF_TYPE3_PROTECTION;
4016 if (scsi_debug_dix)
4017 host_prot |= SHOST_DIX_TYPE3_PROTECTION;
4018 break;
4019
4020 default:
4021 if (scsi_debug_dix)
4022 host_prot |= SHOST_DIX_TYPE0_PROTECTION;
4023 break;
4024 }
4025
4026 scsi_host_set_prot(hpnt, host_prot);
4027
4028 printk(KERN_INFO "scsi_debug: host protection%s%s%s%s%s%s%s\n",
4029 (host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
4030 (host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
4031 (host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
4032 (host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
4033 (host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
4034 (host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
4035 (host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
4036
4037 if (scsi_debug_guard == 1)
4038 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
4039 else
4040 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
4041
1da177e4
LT		 4042 error = scsi_add_host(hpnt, &sdbg_host->dev);
4043 if (error) {
cadbd4a5 4044 printk(KERN_ERR "%s: scsi_add_host failed\n", __func__);
1da177e4
LT		 4045 error = -ENODEV;
4046 scsi_host_put(hpnt);
4047 } else
4048 scsi_scan_host(hpnt);
4049
4050
4051 return error;
4052}
4053
4054static int sdebug_driver_remove(struct device * dev)
4055{
1da177e4 4056 struct sdebug_host_info *sdbg_host;
8b40228f 4057 struct sdebug_dev_info *sdbg_devinfo, *tmp;
1da177e4
LT		 4058
4059 sdbg_host = to_sdebug_host(dev);
4060
4061 if (!sdbg_host) {
4062 printk(KERN_ERR "%s: Unable to locate host info\n",
cadbd4a5 4063 __func__);
1da177e4
LT		 4064 return -ENODEV;
4065 }
4066
4067 scsi_remove_host(sdbg_host->shost);
4068
8b40228f
FT		 4069 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
4070 dev_list) {
1da177e4
LT		 4071 list_del(&sdbg_devinfo->dev_list);
4072 kfree(sdbg_devinfo);
4073 }
4074
4075 scsi_host_put(sdbg_host->shost);
4076 return 0;
4077}
4078
8dea0d02
FT		 4079static int pseudo_lld_bus_match(struct device *dev,
4080 struct device_driver *dev_driver)
1da177e4 4081{
8dea0d02 4082 return 1;
1da177e4 4083}
8dea0d02
FT		 4084
4085static struct bus_type pseudo_lld_bus = {
4086 .name = "pseudo",
4087 .match = pseudo_lld_bus_match,
4088 .probe = sdebug_driver_probe,
4089 .remove = sdebug_driver_remove,
4090};
Linux kernel - Deliverables
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