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Merge branch 'misc' into for-linus
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / scsi / scsi_debug.c
1 /*
2 * vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
3 * Copyright (C) 1992 Eric Youngdale
4 * Simulate a host adapter with 2 disks attached. Do a lot of checking
5 * to make sure that we are not getting blocks mixed up, and PANIC if
6 * anything out of the ordinary is seen.
7 * ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
8 *
9 * This version is more generic, simulating a variable number of disk
10 * (or disk like devices) sharing a common amount of RAM. To be more
11 * realistic, the simulated devices have the transport attributes of
12 * SAS disks.
13 *
14 *
15 * For documentation see http://sg.danny.cz/sg/sdebug26.html
16 *
17 * D. Gilbert (dpg) work for Magneto-Optical device test [20010421]
18 * dpg: work for devfs large number of disks [20010809]
19 * forked for lk 2.5 series [20011216, 20020101]
20 * use vmalloc() more inquiry+mode_sense [20020302]
21 * add timers for delayed responses [20020721]
22 * Patrick Mansfield <patmans@us.ibm.com> max_luns+scsi_level [20021031]
23 * Mike Anderson <andmike@us.ibm.com> sysfs work [20021118]
24 * dpg: change style of boot options to "scsi_debug.num_tgts=2" and
25 * module options to "modprobe scsi_debug num_tgts=2" [20021221]
26 */
27
28 #include <linux/module.h>
29
30 #include <linux/kernel.h>
31 #include <linux/errno.h>
32 #include <linux/timer.h>
33 #include <linux/slab.h>
34 #include <linux/types.h>
35 #include <linux/string.h>
36 #include <linux/genhd.h>
37 #include <linux/fs.h>
38 #include <linux/init.h>
39 #include <linux/proc_fs.h>
40 #include <linux/vmalloc.h>
41 #include <linux/moduleparam.h>
42 #include <linux/scatterlist.h>
43 #include <linux/blkdev.h>
44 #include <linux/crc-t10dif.h>
45
46 #include <net/checksum.h>
47
48 #include <asm/unaligned.h>
49
50 #include <scsi/scsi.h>
51 #include <scsi/scsi_cmnd.h>
52 #include <scsi/scsi_device.h>
53 #include <scsi/scsi_host.h>
54 #include <scsi/scsicam.h>
55 #include <scsi/scsi_eh.h>
56 #include <scsi/scsi_dbg.h>
57
58 #include "sd.h"
59 #include "scsi_logging.h"
60
61 #define SCSI_DEBUG_VERSION "1.82"
62 static const char * scsi_debug_version_date = "20100324";
63
64 /* Additional Sense Code (ASC) */
65 #define NO_ADDITIONAL_SENSE 0x0
66 #define LOGICAL_UNIT_NOT_READY 0x4
67 #define UNRECOVERED_READ_ERR 0x11
68 #define PARAMETER_LIST_LENGTH_ERR 0x1a
69 #define INVALID_OPCODE 0x20
70 #define ADDR_OUT_OF_RANGE 0x21
71 #define INVALID_COMMAND_OPCODE 0x20
72 #define INVALID_FIELD_IN_CDB 0x24
73 #define INVALID_FIELD_IN_PARAM_LIST 0x26
74 #define POWERON_RESET 0x29
75 #define SAVING_PARAMS_UNSUP 0x39
76 #define TRANSPORT_PROBLEM 0x4b
77 #define THRESHOLD_EXCEEDED 0x5d
78 #define LOW_POWER_COND_ON 0x5e
79
80 /* Additional Sense Code Qualifier (ASCQ) */
81 #define ACK_NAK_TO 0x3
82
83 #define SDEBUG_TAGGED_QUEUING 0 /* 0 | MSG_SIMPLE_TAG | MSG_ORDERED_TAG */
84
85 /* Default values for driver parameters */
86 #define DEF_NUM_HOST 1
87 #define DEF_NUM_TGTS 1
88 #define DEF_MAX_LUNS 1
89 /* With these defaults, this driver will make 1 host with 1 target
90 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
91 */
92 #define DEF_ATO 1
93 #define DEF_DELAY 1
94 #define DEF_DEV_SIZE_MB 8
95 #define DEF_DIF 0
96 #define DEF_DIX 0
97 #define DEF_D_SENSE 0
98 #define DEF_EVERY_NTH 0
99 #define DEF_FAKE_RW 0
100 #define DEF_GUARD 0
101 #define DEF_LBPU 0
102 #define DEF_LBPWS 0
103 #define DEF_LBPWS10 0
104 #define DEF_LBPRZ 1
105 #define DEF_LOWEST_ALIGNED 0
106 #define DEF_NO_LUN_0 0
107 #define DEF_NUM_PARTS 0
108 #define DEF_OPTS 0
109 #define DEF_OPT_BLKS 64
110 #define DEF_PHYSBLK_EXP 0
111 #define DEF_PTYPE 0
112 #define DEF_REMOVABLE false
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
117 #define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
118 #define DEF_UNMAP_MAX_DESC 256
119 #define DEF_VIRTUAL_GB 0
120 #define DEF_VPD_USE_HOSTNO 1
121 #define DEF_WRITESAME_LENGTH 0xFFFF
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
128 #define SCSI_DEBUG_OPT_TRANSPORT_ERR 16
129 #define SCSI_DEBUG_OPT_DIF_ERR 32
130 #define SCSI_DEBUG_OPT_DIX_ERR 64
131 #define SCSI_DEBUG_OPT_MAC_TIMEOUT 128
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.
136 * - a TRANSPORT_ERROR is simulated on successful read and write
137 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
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.
143 * - a TRANSPORT_ERROR is simulated on successful read and write
144 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
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 */
152 #define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
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
157 #define SAM2_WLUN_REPORT_LUNS 0xc101
158
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
163 static int scsi_debug_add_host = DEF_NUM_HOST;
164 static int scsi_debug_ato = DEF_ATO;
165 static int scsi_debug_delay = DEF_DELAY;
166 static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB;
167 static int scsi_debug_dif = DEF_DIF;
168 static int scsi_debug_dix = DEF_DIX;
169 static int scsi_debug_dsense = DEF_D_SENSE;
170 static int scsi_debug_every_nth = DEF_EVERY_NTH;
171 static int scsi_debug_fake_rw = DEF_FAKE_RW;
172 static int scsi_debug_guard = DEF_GUARD;
173 static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED;
174 static int scsi_debug_max_luns = DEF_MAX_LUNS;
175 static int scsi_debug_max_queue = SCSI_DEBUG_CANQUEUE;
176 static int scsi_debug_no_lun_0 = DEF_NO_LUN_0;
177 static int scsi_debug_no_uld = 0;
178 static int scsi_debug_num_parts = DEF_NUM_PARTS;
179 static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */
180 static int scsi_debug_opt_blks = DEF_OPT_BLKS;
181 static int scsi_debug_opts = DEF_OPTS;
182 static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP;
183 static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */
184 static int scsi_debug_scsi_level = DEF_SCSI_LEVEL;
185 static int scsi_debug_sector_size = DEF_SECTOR_SIZE;
186 static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB;
187 static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
188 static unsigned int scsi_debug_lbpu = DEF_LBPU;
189 static unsigned int scsi_debug_lbpws = DEF_LBPWS;
190 static unsigned int scsi_debug_lbpws10 = DEF_LBPWS10;
191 static unsigned int scsi_debug_lbprz = DEF_LBPRZ;
192 static unsigned int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
193 static unsigned int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY;
194 static unsigned int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
195 static unsigned int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
196 static unsigned int scsi_debug_write_same_length = DEF_WRITESAME_LENGTH;
197 static bool scsi_debug_removable = DEF_REMOVABLE;
198
199 static int scsi_debug_cmnd_count = 0;
200
201 #define DEV_READONLY(TGT) (0)
202
203 static unsigned int sdebug_store_sectors;
204 static 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 */
208 static int sdebug_heads; /* heads per disk */
209 static int sdebug_cylinders_per; /* cylinders per surface */
210 static int sdebug_sectors_per; /* sectors per cylinder */
211
212 #define SDEBUG_MAX_PARTS 4
213
214 #define SDEBUG_SENSE_LEN 32
215
216 #define SCSI_DEBUG_MAX_CMD_LEN 32
217
218 static unsigned int scsi_debug_lbp(void)
219 {
220 return scsi_debug_lbpu | scsi_debug_lbpws | scsi_debug_lbpws10;
221 }
222
223 struct 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;
230 unsigned int wlun;
231 char reset;
232 char stopped;
233 char used;
234 };
235
236 struct 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
246 static LIST_HEAD(sdebug_host_list);
247 static DEFINE_SPINLOCK(sdebug_host_list_lock);
248
249 typedef void (* done_funct_t) (struct scsi_cmnd *);
250
251 struct 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 };
258 static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
259
260 static unsigned char * fake_storep; /* ramdisk storage */
261 static unsigned char *dif_storep; /* protection info */
262 static void *map_storep; /* provisioning map */
263
264 static unsigned long map_size;
265 static int num_aborts = 0;
266 static int num_dev_resets = 0;
267 static int num_bus_resets = 0;
268 static int num_host_resets = 0;
269 static int dix_writes;
270 static int dix_reads;
271 static int dif_errors;
272
273 static DEFINE_SPINLOCK(queued_arr_lock);
274 static DEFINE_RWLOCK(atomic_rw);
275
276 static char sdebug_proc_name[] = "scsi_debug";
277
278 static struct bus_type pseudo_lld_bus;
279
280 static inline sector_t dif_offset(sector_t sector)
281 {
282 return sector << 3;
283 }
284
285 static struct device_driver sdebug_driverfs_driver = {
286 .name = sdebug_proc_name,
287 .bus = &pseudo_lld_bus,
288 };
289
290 static const int check_condition_result =
291 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
292
293 static const int illegal_condition_result =
294 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
295
296 static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
297 0, 0, 0x2, 0x4b};
298 static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
299 0, 0, 0x0, 0x0};
300
301 static int sdebug_add_adapter(void);
302 static void sdebug_remove_adapter(void);
303
304 static void sdebug_max_tgts_luns(void)
305 {
306 struct sdebug_host_info *sdbg_host;
307 struct Scsi_Host *hpnt;
308
309 spin_lock(&sdebug_host_list_lock);
310 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
311 hpnt = sdbg_host->shost;
312 if ((hpnt->this_id >= 0) &&
313 (scsi_debug_num_tgts > hpnt->this_id))
314 hpnt->max_id = scsi_debug_num_tgts + 1;
315 else
316 hpnt->max_id = scsi_debug_num_tgts;
317 /* scsi_debug_max_luns; */
318 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS;
319 }
320 spin_unlock(&sdebug_host_list_lock);
321 }
322
323 static void mk_sense_buffer(struct sdebug_dev_info *devip, int key,
324 int asc, int asq)
325 {
326 unsigned char *sbuff;
327
328 sbuff = devip->sense_buff;
329 memset(sbuff, 0, SDEBUG_SENSE_LEN);
330
331 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, key, asc, asq);
332
333 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
334 printk(KERN_INFO "scsi_debug: [sense_key,asc,ascq]: "
335 "[0x%x,0x%x,0x%x]\n", key, asc, asq);
336 }
337
338 static void get_data_transfer_info(unsigned char *cmd,
339 unsigned long long *lba, unsigned int *num,
340 u32 *ei_lba)
341 {
342 *ei_lba = 0;
343
344 switch (*cmd) {
345 case VARIABLE_LENGTH_CMD:
346 *lba = (u64)cmd[19] | (u64)cmd[18] << 8 |
347 (u64)cmd[17] << 16 | (u64)cmd[16] << 24 |
348 (u64)cmd[15] << 32 | (u64)cmd[14] << 40 |
349 (u64)cmd[13] << 48 | (u64)cmd[12] << 56;
350
351 *ei_lba = (u32)cmd[23] | (u32)cmd[22] << 8 |
352 (u32)cmd[21] << 16 | (u32)cmd[20] << 24;
353
354 *num = (u32)cmd[31] | (u32)cmd[30] << 8 | (u32)cmd[29] << 16 |
355 (u32)cmd[28] << 24;
356 break;
357
358 case WRITE_SAME_16:
359 case WRITE_16:
360 case READ_16:
361 *lba = (u64)cmd[9] | (u64)cmd[8] << 8 |
362 (u64)cmd[7] << 16 | (u64)cmd[6] << 24 |
363 (u64)cmd[5] << 32 | (u64)cmd[4] << 40 |
364 (u64)cmd[3] << 48 | (u64)cmd[2] << 56;
365
366 *num = (u32)cmd[13] | (u32)cmd[12] << 8 | (u32)cmd[11] << 16 |
367 (u32)cmd[10] << 24;
368 break;
369 case WRITE_12:
370 case READ_12:
371 *lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 |
372 (u32)cmd[2] << 24;
373
374 *num = (u32)cmd[9] | (u32)cmd[8] << 8 | (u32)cmd[7] << 16 |
375 (u32)cmd[6] << 24;
376 break;
377 case WRITE_SAME:
378 case WRITE_10:
379 case READ_10:
380 case XDWRITEREAD_10:
381 *lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 |
382 (u32)cmd[2] << 24;
383
384 *num = (u32)cmd[8] | (u32)cmd[7] << 8;
385 break;
386 case WRITE_6:
387 case READ_6:
388 *lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
389 (u32)(cmd[1] & 0x1f) << 16;
390 *num = (0 == cmd[4]) ? 256 : cmd[4];
391 break;
392 default:
393 break;
394 }
395 }
396
397 static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
398 {
399 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
400 printk(KERN_INFO "scsi_debug: ioctl: cmd=0x%x\n", cmd);
401 }
402 return -EINVAL;
403 /* return -ENOTTY; // correct return but upsets fdisk */
404 }
405
406 static int check_readiness(struct scsi_cmnd * SCpnt, int reset_only,
407 struct sdebug_dev_info * devip)
408 {
409 if (devip->reset) {
410 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
411 printk(KERN_INFO "scsi_debug: Reporting Unit "
412 "attention: power on reset\n");
413 devip->reset = 0;
414 mk_sense_buffer(devip, UNIT_ATTENTION, POWERON_RESET, 0);
415 return check_condition_result;
416 }
417 if ((0 == reset_only) && devip->stopped) {
418 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
419 printk(KERN_INFO "scsi_debug: Reporting Not "
420 "ready: initializing command required\n");
421 mk_sense_buffer(devip, NOT_READY, LOGICAL_UNIT_NOT_READY,
422 0x2);
423 return check_condition_result;
424 }
425 return 0;
426 }
427
428 /* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */
429 static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
430 int arr_len)
431 {
432 int act_len;
433 struct scsi_data_buffer *sdb = scsi_in(scp);
434
435 if (!sdb->length)
436 return 0;
437 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
438 return (DID_ERROR << 16);
439
440 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
441 arr, arr_len);
442 if (sdb->resid)
443 sdb->resid -= act_len;
444 else
445 sdb->resid = scsi_bufflen(scp) - act_len;
446
447 return 0;
448 }
449
450 /* Returns number of bytes fetched into 'arr' or -1 if error. */
451 static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
452 int arr_len)
453 {
454 if (!scsi_bufflen(scp))
455 return 0;
456 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE))
457 return -1;
458
459 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
460 }
461
462
463 static const char * inq_vendor_id = "Linux ";
464 static const char * inq_product_id = "scsi_debug ";
465 static const char * inq_product_rev = "0004";
466
467 static int inquiry_evpd_83(unsigned char * arr, int port_group_id,
468 int target_dev_id, int dev_id_num,
469 const char * dev_id_str,
470 int dev_id_str_len)
471 {
472 int num, port_a;
473 char b[32];
474
475 port_a = target_dev_id + 1;
476 /* T10 vendor identifier field format (faked) */
477 arr[0] = 0x2; /* ASCII */
478 arr[1] = 0x1;
479 arr[2] = 0x0;
480 memcpy(&arr[4], inq_vendor_id, 8);
481 memcpy(&arr[12], inq_product_id, 16);
482 memcpy(&arr[28], dev_id_str, dev_id_str_len);
483 num = 8 + 16 + dev_id_str_len;
484 arr[3] = num;
485 num += 4;
486 if (dev_id_num >= 0) {
487 /* NAA-5, Logical unit identifier (binary) */
488 arr[num++] = 0x1; /* binary (not necessarily sas) */
489 arr[num++] = 0x3; /* PIV=0, lu, naa */
490 arr[num++] = 0x0;
491 arr[num++] = 0x8;
492 arr[num++] = 0x53; /* naa-5 ieee company id=0x333333 (fake) */
493 arr[num++] = 0x33;
494 arr[num++] = 0x33;
495 arr[num++] = 0x30;
496 arr[num++] = (dev_id_num >> 24);
497 arr[num++] = (dev_id_num >> 16) & 0xff;
498 arr[num++] = (dev_id_num >> 8) & 0xff;
499 arr[num++] = dev_id_num & 0xff;
500 /* Target relative port number */
501 arr[num++] = 0x61; /* proto=sas, binary */
502 arr[num++] = 0x94; /* PIV=1, target port, rel port */
503 arr[num++] = 0x0; /* reserved */
504 arr[num++] = 0x4; /* length */
505 arr[num++] = 0x0; /* reserved */
506 arr[num++] = 0x0; /* reserved */
507 arr[num++] = 0x0;
508 arr[num++] = 0x1; /* relative port A */
509 }
510 /* NAA-5, Target port identifier */
511 arr[num++] = 0x61; /* proto=sas, binary */
512 arr[num++] = 0x93; /* piv=1, target port, naa */
513 arr[num++] = 0x0;
514 arr[num++] = 0x8;
515 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
516 arr[num++] = 0x22;
517 arr[num++] = 0x22;
518 arr[num++] = 0x20;
519 arr[num++] = (port_a >> 24);
520 arr[num++] = (port_a >> 16) & 0xff;
521 arr[num++] = (port_a >> 8) & 0xff;
522 arr[num++] = port_a & 0xff;
523 /* NAA-5, Target port group identifier */
524 arr[num++] = 0x61; /* proto=sas, binary */
525 arr[num++] = 0x95; /* piv=1, target port group id */
526 arr[num++] = 0x0;
527 arr[num++] = 0x4;
528 arr[num++] = 0;
529 arr[num++] = 0;
530 arr[num++] = (port_group_id >> 8) & 0xff;
531 arr[num++] = port_group_id & 0xff;
532 /* NAA-5, Target device identifier */
533 arr[num++] = 0x61; /* proto=sas, binary */
534 arr[num++] = 0xa3; /* piv=1, target device, naa */
535 arr[num++] = 0x0;
536 arr[num++] = 0x8;
537 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
538 arr[num++] = 0x22;
539 arr[num++] = 0x22;
540 arr[num++] = 0x20;
541 arr[num++] = (target_dev_id >> 24);
542 arr[num++] = (target_dev_id >> 16) & 0xff;
543 arr[num++] = (target_dev_id >> 8) & 0xff;
544 arr[num++] = target_dev_id & 0xff;
545 /* SCSI name string: Target device identifier */
546 arr[num++] = 0x63; /* proto=sas, UTF-8 */
547 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
548 arr[num++] = 0x0;
549 arr[num++] = 24;
550 memcpy(arr + num, "naa.52222220", 12);
551 num += 12;
552 snprintf(b, sizeof(b), "%08X", target_dev_id);
553 memcpy(arr + num, b, 8);
554 num += 8;
555 memset(arr + num, 0, 4);
556 num += 4;
557 return num;
558 }
559
560
561 static unsigned char vpd84_data[] = {
562 /* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
563 0x22,0x22,0x22,0x0,0xbb,0x1,
564 0x22,0x22,0x22,0x0,0xbb,0x2,
565 };
566
567 static int inquiry_evpd_84(unsigned char * arr)
568 {
569 memcpy(arr, vpd84_data, sizeof(vpd84_data));
570 return sizeof(vpd84_data);
571 }
572
573 static int inquiry_evpd_85(unsigned char * arr)
574 {
575 int num = 0;
576 const char * na1 = "https://www.kernel.org/config";
577 const char * na2 = "http://www.kernel.org/log";
578 int plen, olen;
579
580 arr[num++] = 0x1; /* lu, storage config */
581 arr[num++] = 0x0; /* reserved */
582 arr[num++] = 0x0;
583 olen = strlen(na1);
584 plen = olen + 1;
585 if (plen % 4)
586 plen = ((plen / 4) + 1) * 4;
587 arr[num++] = plen; /* length, null termianted, padded */
588 memcpy(arr + num, na1, olen);
589 memset(arr + num + olen, 0, plen - olen);
590 num += plen;
591
592 arr[num++] = 0x4; /* lu, logging */
593 arr[num++] = 0x0; /* reserved */
594 arr[num++] = 0x0;
595 olen = strlen(na2);
596 plen = olen + 1;
597 if (plen % 4)
598 plen = ((plen / 4) + 1) * 4;
599 arr[num++] = plen; /* length, null terminated, padded */
600 memcpy(arr + num, na2, olen);
601 memset(arr + num + olen, 0, plen - olen);
602 num += plen;
603
604 return num;
605 }
606
607 /* SCSI ports VPD page */
608 static int inquiry_evpd_88(unsigned char * arr, int target_dev_id)
609 {
610 int num = 0;
611 int port_a, port_b;
612
613 port_a = target_dev_id + 1;
614 port_b = port_a + 1;
615 arr[num++] = 0x0; /* reserved */
616 arr[num++] = 0x0; /* reserved */
617 arr[num++] = 0x0;
618 arr[num++] = 0x1; /* relative port 1 (primary) */
619 memset(arr + num, 0, 6);
620 num += 6;
621 arr[num++] = 0x0;
622 arr[num++] = 12; /* length tp descriptor */
623 /* naa-5 target port identifier (A) */
624 arr[num++] = 0x61; /* proto=sas, binary */
625 arr[num++] = 0x93; /* PIV=1, target port, NAA */
626 arr[num++] = 0x0; /* reserved */
627 arr[num++] = 0x8; /* length */
628 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
629 arr[num++] = 0x22;
630 arr[num++] = 0x22;
631 arr[num++] = 0x20;
632 arr[num++] = (port_a >> 24);
633 arr[num++] = (port_a >> 16) & 0xff;
634 arr[num++] = (port_a >> 8) & 0xff;
635 arr[num++] = port_a & 0xff;
636
637 arr[num++] = 0x0; /* reserved */
638 arr[num++] = 0x0; /* reserved */
639 arr[num++] = 0x0;
640 arr[num++] = 0x2; /* relative port 2 (secondary) */
641 memset(arr + num, 0, 6);
642 num += 6;
643 arr[num++] = 0x0;
644 arr[num++] = 12; /* length tp descriptor */
645 /* naa-5 target port identifier (B) */
646 arr[num++] = 0x61; /* proto=sas, binary */
647 arr[num++] = 0x93; /* PIV=1, target port, NAA */
648 arr[num++] = 0x0; /* reserved */
649 arr[num++] = 0x8; /* length */
650 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
651 arr[num++] = 0x22;
652 arr[num++] = 0x22;
653 arr[num++] = 0x20;
654 arr[num++] = (port_b >> 24);
655 arr[num++] = (port_b >> 16) & 0xff;
656 arr[num++] = (port_b >> 8) & 0xff;
657 arr[num++] = port_b & 0xff;
658
659 return num;
660 }
661
662
663 static unsigned char vpd89_data[] = {
664 /* from 4th byte */ 0,0,0,0,
665 'l','i','n','u','x',' ',' ',' ',
666 'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
667 '1','2','3','4',
668 0x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
669 0xec,0,0,0,
670 0x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
671 0,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
672 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
673 0x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
674 0x53,0x41,
675 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
676 0x20,0x20,
677 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
678 0x10,0x80,
679 0,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
680 0x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
681 0x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
682 0,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
683 0x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
684 0x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
685 0,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
686 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
687 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
688 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
689 0x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
690 0,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
691 0xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
692 0,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
693 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
694 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
695 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
696 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
697 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
698 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
699 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
700 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
701 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
702 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
703 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
704 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
705 };
706
707 static int inquiry_evpd_89(unsigned char * arr)
708 {
709 memcpy(arr, vpd89_data, sizeof(vpd89_data));
710 return sizeof(vpd89_data);
711 }
712
713
714 /* Block limits VPD page (SBC-3) */
715 static unsigned char vpdb0_data[] = {
716 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
717 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
718 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
719 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
720 };
721
722 static int inquiry_evpd_b0(unsigned char * arr)
723 {
724 unsigned int gran;
725
726 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
727
728 /* Optimal transfer length granularity */
729 gran = 1 << scsi_debug_physblk_exp;
730 arr[2] = (gran >> 8) & 0xff;
731 arr[3] = gran & 0xff;
732
733 /* Maximum Transfer Length */
734 if (sdebug_store_sectors > 0x400) {
735 arr[4] = (sdebug_store_sectors >> 24) & 0xff;
736 arr[5] = (sdebug_store_sectors >> 16) & 0xff;
737 arr[6] = (sdebug_store_sectors >> 8) & 0xff;
738 arr[7] = sdebug_store_sectors & 0xff;
739 }
740
741 /* Optimal Transfer Length */
742 put_unaligned_be32(scsi_debug_opt_blks, &arr[8]);
743
744 if (scsi_debug_lbpu) {
745 /* Maximum Unmap LBA Count */
746 put_unaligned_be32(scsi_debug_unmap_max_blocks, &arr[16]);
747
748 /* Maximum Unmap Block Descriptor Count */
749 put_unaligned_be32(scsi_debug_unmap_max_desc, &arr[20]);
750 }
751
752 /* Unmap Granularity Alignment */
753 if (scsi_debug_unmap_alignment) {
754 put_unaligned_be32(scsi_debug_unmap_alignment, &arr[28]);
755 arr[28] |= 0x80; /* UGAVALID */
756 }
757
758 /* Optimal Unmap Granularity */
759 put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]);
760
761 /* Maximum WRITE SAME Length */
762 put_unaligned_be64(scsi_debug_write_same_length, &arr[32]);
763
764 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
765
766 return sizeof(vpdb0_data);
767 }
768
769 /* Block device characteristics VPD page (SBC-3) */
770 static int inquiry_evpd_b1(unsigned char *arr)
771 {
772 memset(arr, 0, 0x3c);
773 arr[0] = 0;
774 arr[1] = 1; /* non rotating medium (e.g. solid state) */
775 arr[2] = 0;
776 arr[3] = 5; /* less than 1.8" */
777
778 return 0x3c;
779 }
780
781 /* Logical block provisioning VPD page (SBC-3) */
782 static int inquiry_evpd_b2(unsigned char *arr)
783 {
784 memset(arr, 0, 0x4);
785 arr[0] = 0; /* threshold exponent */
786
787 if (scsi_debug_lbpu)
788 arr[1] = 1 << 7;
789
790 if (scsi_debug_lbpws)
791 arr[1] |= 1 << 6;
792
793 if (scsi_debug_lbpws10)
794 arr[1] |= 1 << 5;
795
796 if (scsi_debug_lbprz)
797 arr[1] |= 1 << 2;
798
799 return 0x4;
800 }
801
802 #define SDEBUG_LONG_INQ_SZ 96
803 #define SDEBUG_MAX_INQ_ARR_SZ 584
804
805 static int resp_inquiry(struct scsi_cmnd * scp, int target,
806 struct sdebug_dev_info * devip)
807 {
808 unsigned char pq_pdt;
809 unsigned char * arr;
810 unsigned char *cmd = (unsigned char *)scp->cmnd;
811 int alloc_len, n, ret;
812
813 alloc_len = (cmd[3] << 8) + cmd[4];
814 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
815 if (! arr)
816 return DID_REQUEUE << 16;
817 if (devip->wlun)
818 pq_pdt = 0x1e; /* present, wlun */
819 else if (scsi_debug_no_lun_0 && (0 == devip->lun))
820 pq_pdt = 0x7f; /* not present, no device type */
821 else
822 pq_pdt = (scsi_debug_ptype & 0x1f);
823 arr[0] = pq_pdt;
824 if (0x2 & cmd[1]) { /* CMDDT bit set */
825 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
826 0);
827 kfree(arr);
828 return check_condition_result;
829 } else if (0x1 & cmd[1]) { /* EVPD bit set */
830 int lu_id_num, port_group_id, target_dev_id, len;
831 char lu_id_str[6];
832 int host_no = devip->sdbg_host->shost->host_no;
833
834 port_group_id = (((host_no + 1) & 0x7f) << 8) +
835 (devip->channel & 0x7f);
836 if (0 == scsi_debug_vpd_use_hostno)
837 host_no = 0;
838 lu_id_num = devip->wlun ? -1 : (((host_no + 1) * 2000) +
839 (devip->target * 1000) + devip->lun);
840 target_dev_id = ((host_no + 1) * 2000) +
841 (devip->target * 1000) - 3;
842 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
843 if (0 == cmd[2]) { /* supported vital product data pages */
844 arr[1] = cmd[2]; /*sanity */
845 n = 4;
846 arr[n++] = 0x0; /* this page */
847 arr[n++] = 0x80; /* unit serial number */
848 arr[n++] = 0x83; /* device identification */
849 arr[n++] = 0x84; /* software interface ident. */
850 arr[n++] = 0x85; /* management network addresses */
851 arr[n++] = 0x86; /* extended inquiry */
852 arr[n++] = 0x87; /* mode page policy */
853 arr[n++] = 0x88; /* SCSI ports */
854 arr[n++] = 0x89; /* ATA information */
855 arr[n++] = 0xb0; /* Block limits (SBC) */
856 arr[n++] = 0xb1; /* Block characteristics (SBC) */
857 if (scsi_debug_lbp()) /* Logical Block Prov. (SBC) */
858 arr[n++] = 0xb2;
859 arr[3] = n - 4; /* number of supported VPD pages */
860 } else if (0x80 == cmd[2]) { /* unit serial number */
861 arr[1] = cmd[2]; /*sanity */
862 arr[3] = len;
863 memcpy(&arr[4], lu_id_str, len);
864 } else if (0x83 == cmd[2]) { /* device identification */
865 arr[1] = cmd[2]; /*sanity */
866 arr[3] = inquiry_evpd_83(&arr[4], port_group_id,
867 target_dev_id, lu_id_num,
868 lu_id_str, len);
869 } else if (0x84 == cmd[2]) { /* Software interface ident. */
870 arr[1] = cmd[2]; /*sanity */
871 arr[3] = inquiry_evpd_84(&arr[4]);
872 } else if (0x85 == cmd[2]) { /* Management network addresses */
873 arr[1] = cmd[2]; /*sanity */
874 arr[3] = inquiry_evpd_85(&arr[4]);
875 } else if (0x86 == cmd[2]) { /* extended inquiry */
876 arr[1] = cmd[2]; /*sanity */
877 arr[3] = 0x3c; /* number of following entries */
878 if (scsi_debug_dif == SD_DIF_TYPE3_PROTECTION)
879 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
880 else if (scsi_debug_dif)
881 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
882 else
883 arr[4] = 0x0; /* no protection stuff */
884 arr[5] = 0x7; /* head of q, ordered + simple q's */
885 } else if (0x87 == cmd[2]) { /* mode page policy */
886 arr[1] = cmd[2]; /*sanity */
887 arr[3] = 0x8; /* number of following entries */
888 arr[4] = 0x2; /* disconnect-reconnect mp */
889 arr[6] = 0x80; /* mlus, shared */
890 arr[8] = 0x18; /* protocol specific lu */
891 arr[10] = 0x82; /* mlus, per initiator port */
892 } else if (0x88 == cmd[2]) { /* SCSI Ports */
893 arr[1] = cmd[2]; /*sanity */
894 arr[3] = inquiry_evpd_88(&arr[4], target_dev_id);
895 } else if (0x89 == cmd[2]) { /* ATA information */
896 arr[1] = cmd[2]; /*sanity */
897 n = inquiry_evpd_89(&arr[4]);
898 arr[2] = (n >> 8);
899 arr[3] = (n & 0xff);
900 } else if (0xb0 == cmd[2]) { /* Block limits (SBC) */
901 arr[1] = cmd[2]; /*sanity */
902 arr[3] = inquiry_evpd_b0(&arr[4]);
903 } else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */
904 arr[1] = cmd[2]; /*sanity */
905 arr[3] = inquiry_evpd_b1(&arr[4]);
906 } else if (0xb2 == cmd[2]) { /* Logical Block Prov. (SBC) */
907 arr[1] = cmd[2]; /*sanity */
908 arr[3] = inquiry_evpd_b2(&arr[4]);
909 } else {
910 /* Illegal request, invalid field in cdb */
911 mk_sense_buffer(devip, ILLEGAL_REQUEST,
912 INVALID_FIELD_IN_CDB, 0);
913 kfree(arr);
914 return check_condition_result;
915 }
916 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
917 ret = fill_from_dev_buffer(scp, arr,
918 min(len, SDEBUG_MAX_INQ_ARR_SZ));
919 kfree(arr);
920 return ret;
921 }
922 /* drops through here for a standard inquiry */
923 arr[1] = scsi_debug_removable ? 0x80 : 0; /* Removable disk */
924 arr[2] = scsi_debug_scsi_level;
925 arr[3] = 2; /* response_data_format==2 */
926 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
927 arr[5] = scsi_debug_dif ? 1 : 0; /* PROTECT bit */
928 if (0 == scsi_debug_vpd_use_hostno)
929 arr[5] = 0x10; /* claim: implicit TGPS */
930 arr[6] = 0x10; /* claim: MultiP */
931 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
932 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
933 memcpy(&arr[8], inq_vendor_id, 8);
934 memcpy(&arr[16], inq_product_id, 16);
935 memcpy(&arr[32], inq_product_rev, 4);
936 /* version descriptors (2 bytes each) follow */
937 arr[58] = 0x0; arr[59] = 0x77; /* SAM-3 ANSI */
938 arr[60] = 0x3; arr[61] = 0x14; /* SPC-3 ANSI */
939 n = 62;
940 if (scsi_debug_ptype == 0) {
941 arr[n++] = 0x3; arr[n++] = 0x3d; /* SBC-2 ANSI */
942 } else if (scsi_debug_ptype == 1) {
943 arr[n++] = 0x3; arr[n++] = 0x60; /* SSC-2 no version */
944 }
945 arr[n++] = 0xc; arr[n++] = 0xf; /* SAS-1.1 rev 10 */
946 ret = fill_from_dev_buffer(scp, arr,
947 min(alloc_len, SDEBUG_LONG_INQ_SZ));
948 kfree(arr);
949 return ret;
950 }
951
952 static int resp_requests(struct scsi_cmnd * scp,
953 struct sdebug_dev_info * devip)
954 {
955 unsigned char * sbuff;
956 unsigned char *cmd = (unsigned char *)scp->cmnd;
957 unsigned char arr[SDEBUG_SENSE_LEN];
958 int want_dsense;
959 int len = 18;
960
961 memset(arr, 0, sizeof(arr));
962 if (devip->reset == 1)
963 mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0);
964 want_dsense = !!(cmd[1] & 1) || scsi_debug_dsense;
965 sbuff = devip->sense_buff;
966 if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
967 if (want_dsense) {
968 arr[0] = 0x72;
969 arr[1] = 0x0; /* NO_SENSE in sense_key */
970 arr[2] = THRESHOLD_EXCEEDED;
971 arr[3] = 0xff; /* TEST set and MRIE==6 */
972 } else {
973 arr[0] = 0x70;
974 arr[2] = 0x0; /* NO_SENSE in sense_key */
975 arr[7] = 0xa; /* 18 byte sense buffer */
976 arr[12] = THRESHOLD_EXCEEDED;
977 arr[13] = 0xff; /* TEST set and MRIE==6 */
978 }
979 } else {
980 memcpy(arr, sbuff, SDEBUG_SENSE_LEN);
981 if ((cmd[1] & 1) && (! scsi_debug_dsense)) {
982 /* DESC bit set and sense_buff in fixed format */
983 memset(arr, 0, sizeof(arr));
984 arr[0] = 0x72;
985 arr[1] = sbuff[2]; /* sense key */
986 arr[2] = sbuff[12]; /* asc */
987 arr[3] = sbuff[13]; /* ascq */
988 len = 8;
989 }
990 }
991 mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0);
992 return fill_from_dev_buffer(scp, arr, len);
993 }
994
995 static int resp_start_stop(struct scsi_cmnd * scp,
996 struct sdebug_dev_info * devip)
997 {
998 unsigned char *cmd = (unsigned char *)scp->cmnd;
999 int power_cond, errsts, start;
1000
1001 if ((errsts = check_readiness(scp, 1, devip)))
1002 return errsts;
1003 power_cond = (cmd[4] & 0xf0) >> 4;
1004 if (power_cond) {
1005 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
1006 0);
1007 return check_condition_result;
1008 }
1009 start = cmd[4] & 1;
1010 if (start == devip->stopped)
1011 devip->stopped = !start;
1012 return 0;
1013 }
1014
1015 static sector_t get_sdebug_capacity(void)
1016 {
1017 if (scsi_debug_virtual_gb > 0)
1018 return (sector_t)scsi_debug_virtual_gb *
1019 (1073741824 / scsi_debug_sector_size);
1020 else
1021 return sdebug_store_sectors;
1022 }
1023
1024 #define SDEBUG_READCAP_ARR_SZ 8
1025 static int resp_readcap(struct scsi_cmnd * scp,
1026 struct sdebug_dev_info * devip)
1027 {
1028 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
1029 unsigned int capac;
1030 int errsts;
1031
1032 if ((errsts = check_readiness(scp, 1, devip)))
1033 return errsts;
1034 /* following just in case virtual_gb changed */
1035 sdebug_capacity = get_sdebug_capacity();
1036 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
1037 if (sdebug_capacity < 0xffffffff) {
1038 capac = (unsigned int)sdebug_capacity - 1;
1039 arr[0] = (capac >> 24);
1040 arr[1] = (capac >> 16) & 0xff;
1041 arr[2] = (capac >> 8) & 0xff;
1042 arr[3] = capac & 0xff;
1043 } else {
1044 arr[0] = 0xff;
1045 arr[1] = 0xff;
1046 arr[2] = 0xff;
1047 arr[3] = 0xff;
1048 }
1049 arr[6] = (scsi_debug_sector_size >> 8) & 0xff;
1050 arr[7] = scsi_debug_sector_size & 0xff;
1051 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1052 }
1053
1054 #define SDEBUG_READCAP16_ARR_SZ 32
1055 static int resp_readcap16(struct scsi_cmnd * scp,
1056 struct sdebug_dev_info * devip)
1057 {
1058 unsigned char *cmd = (unsigned char *)scp->cmnd;
1059 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
1060 unsigned long long capac;
1061 int errsts, k, alloc_len;
1062
1063 if ((errsts = check_readiness(scp, 1, devip)))
1064 return errsts;
1065 alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8)
1066 + cmd[13]);
1067 /* following just in case virtual_gb changed */
1068 sdebug_capacity = get_sdebug_capacity();
1069 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
1070 capac = sdebug_capacity - 1;
1071 for (k = 0; k < 8; ++k, capac >>= 8)
1072 arr[7 - k] = capac & 0xff;
1073 arr[8] = (scsi_debug_sector_size >> 24) & 0xff;
1074 arr[9] = (scsi_debug_sector_size >> 16) & 0xff;
1075 arr[10] = (scsi_debug_sector_size >> 8) & 0xff;
1076 arr[11] = scsi_debug_sector_size & 0xff;
1077 arr[13] = scsi_debug_physblk_exp & 0xf;
1078 arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f;
1079
1080 if (scsi_debug_lbp()) {
1081 arr[14] |= 0x80; /* LBPME */
1082 if (scsi_debug_lbprz)
1083 arr[14] |= 0x40; /* LBPRZ */
1084 }
1085
1086 arr[15] = scsi_debug_lowest_aligned & 0xff;
1087
1088 if (scsi_debug_dif) {
1089 arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */
1090 arr[12] |= 1; /* PROT_EN */
1091 }
1092
1093 return fill_from_dev_buffer(scp, arr,
1094 min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
1095 }
1096
1097 #define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1098
1099 static int resp_report_tgtpgs(struct scsi_cmnd * scp,
1100 struct sdebug_dev_info * devip)
1101 {
1102 unsigned char *cmd = (unsigned char *)scp->cmnd;
1103 unsigned char * arr;
1104 int host_no = devip->sdbg_host->shost->host_no;
1105 int n, ret, alen, rlen;
1106 int port_group_a, port_group_b, port_a, port_b;
1107
1108 alen = ((cmd[6] << 24) + (cmd[7] << 16) + (cmd[8] << 8)
1109 + cmd[9]);
1110
1111 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1112 if (! arr)
1113 return DID_REQUEUE << 16;
1114 /*
1115 * EVPD page 0x88 states we have two ports, one
1116 * real and a fake port with no device connected.
1117 * So we create two port groups with one port each
1118 * and set the group with port B to unavailable.
1119 */
1120 port_a = 0x1; /* relative port A */
1121 port_b = 0x2; /* relative port B */
1122 port_group_a = (((host_no + 1) & 0x7f) << 8) +
1123 (devip->channel & 0x7f);
1124 port_group_b = (((host_no + 1) & 0x7f) << 8) +
1125 (devip->channel & 0x7f) + 0x80;
1126
1127 /*
1128 * The asymmetric access state is cycled according to the host_id.
1129 */
1130 n = 4;
1131 if (0 == scsi_debug_vpd_use_hostno) {
1132 arr[n++] = host_no % 3; /* Asymm access state */
1133 arr[n++] = 0x0F; /* claim: all states are supported */
1134 } else {
1135 arr[n++] = 0x0; /* Active/Optimized path */
1136 arr[n++] = 0x01; /* claim: only support active/optimized paths */
1137 }
1138 arr[n++] = (port_group_a >> 8) & 0xff;
1139 arr[n++] = port_group_a & 0xff;
1140 arr[n++] = 0; /* Reserved */
1141 arr[n++] = 0; /* Status code */
1142 arr[n++] = 0; /* Vendor unique */
1143 arr[n++] = 0x1; /* One port per group */
1144 arr[n++] = 0; /* Reserved */
1145 arr[n++] = 0; /* Reserved */
1146 arr[n++] = (port_a >> 8) & 0xff;
1147 arr[n++] = port_a & 0xff;
1148 arr[n++] = 3; /* Port unavailable */
1149 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
1150 arr[n++] = (port_group_b >> 8) & 0xff;
1151 arr[n++] = port_group_b & 0xff;
1152 arr[n++] = 0; /* Reserved */
1153 arr[n++] = 0; /* Status code */
1154 arr[n++] = 0; /* Vendor unique */
1155 arr[n++] = 0x1; /* One port per group */
1156 arr[n++] = 0; /* Reserved */
1157 arr[n++] = 0; /* Reserved */
1158 arr[n++] = (port_b >> 8) & 0xff;
1159 arr[n++] = port_b & 0xff;
1160
1161 rlen = n - 4;
1162 arr[0] = (rlen >> 24) & 0xff;
1163 arr[1] = (rlen >> 16) & 0xff;
1164 arr[2] = (rlen >> 8) & 0xff;
1165 arr[3] = rlen & 0xff;
1166
1167 /*
1168 * Return the smallest value of either
1169 * - The allocated length
1170 * - The constructed command length
1171 * - The maximum array size
1172 */
1173 rlen = min(alen,n);
1174 ret = fill_from_dev_buffer(scp, arr,
1175 min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1176 kfree(arr);
1177 return ret;
1178 }
1179
1180 /* <<Following mode page info copied from ST318451LW>> */
1181
1182 static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target)
1183 { /* Read-Write Error Recovery page for mode_sense */
1184 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
1185 5, 0, 0xff, 0xff};
1186
1187 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
1188 if (1 == pcontrol)
1189 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
1190 return sizeof(err_recov_pg);
1191 }
1192
1193 static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target)
1194 { /* Disconnect-Reconnect page for mode_sense */
1195 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
1196 0, 0, 0, 0, 0, 0, 0, 0};
1197
1198 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
1199 if (1 == pcontrol)
1200 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
1201 return sizeof(disconnect_pg);
1202 }
1203
1204 static int resp_format_pg(unsigned char * p, int pcontrol, int target)
1205 { /* Format device page for mode_sense */
1206 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
1207 0, 0, 0, 0, 0, 0, 0, 0,
1208 0, 0, 0, 0, 0x40, 0, 0, 0};
1209
1210 memcpy(p, format_pg, sizeof(format_pg));
1211 p[10] = (sdebug_sectors_per >> 8) & 0xff;
1212 p[11] = sdebug_sectors_per & 0xff;
1213 p[12] = (scsi_debug_sector_size >> 8) & 0xff;
1214 p[13] = scsi_debug_sector_size & 0xff;
1215 if (scsi_debug_removable)
1216 p[20] |= 0x20; /* should agree with INQUIRY */
1217 if (1 == pcontrol)
1218 memset(p + 2, 0, sizeof(format_pg) - 2);
1219 return sizeof(format_pg);
1220 }
1221
1222 static int resp_caching_pg(unsigned char * p, int pcontrol, int target)
1223 { /* Caching page for mode_sense */
1224 unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
1225 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
1226
1227 memcpy(p, caching_pg, sizeof(caching_pg));
1228 if (1 == pcontrol)
1229 memset(p + 2, 0, sizeof(caching_pg) - 2);
1230 return sizeof(caching_pg);
1231 }
1232
1233 static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
1234 { /* Control mode page for mode_sense */
1235 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
1236 0, 0, 0, 0};
1237 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
1238 0, 0, 0x2, 0x4b};
1239
1240 if (scsi_debug_dsense)
1241 ctrl_m_pg[2] |= 0x4;
1242 else
1243 ctrl_m_pg[2] &= ~0x4;
1244
1245 if (scsi_debug_ato)
1246 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
1247
1248 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
1249 if (1 == pcontrol)
1250 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
1251 else if (2 == pcontrol)
1252 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
1253 return sizeof(ctrl_m_pg);
1254 }
1255
1256
1257 static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target)
1258 { /* Informational Exceptions control mode page for mode_sense */
1259 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
1260 0, 0, 0x0, 0x0};
1261 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1262 0, 0, 0x0, 0x0};
1263
1264 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
1265 if (1 == pcontrol)
1266 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
1267 else if (2 == pcontrol)
1268 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
1269 return sizeof(iec_m_pg);
1270 }
1271
1272 static int resp_sas_sf_m_pg(unsigned char * p, int pcontrol, int target)
1273 { /* SAS SSP mode page - short format for mode_sense */
1274 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
1275 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
1276
1277 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
1278 if (1 == pcontrol)
1279 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
1280 return sizeof(sas_sf_m_pg);
1281 }
1282
1283
1284 static int resp_sas_pcd_m_spg(unsigned char * p, int pcontrol, int target,
1285 int target_dev_id)
1286 { /* SAS phy control and discover mode page for mode_sense */
1287 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
1288 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
1289 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1290 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1291 0x2, 0, 0, 0, 0, 0, 0, 0,
1292 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1293 0, 0, 0, 0, 0, 0, 0, 0,
1294 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
1295 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1296 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1297 0x3, 0, 0, 0, 0, 0, 0, 0,
1298 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1299 0, 0, 0, 0, 0, 0, 0, 0,
1300 };
1301 int port_a, port_b;
1302
1303 port_a = target_dev_id + 1;
1304 port_b = port_a + 1;
1305 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
1306 p[20] = (port_a >> 24);
1307 p[21] = (port_a >> 16) & 0xff;
1308 p[22] = (port_a >> 8) & 0xff;
1309 p[23] = port_a & 0xff;
1310 p[48 + 20] = (port_b >> 24);
1311 p[48 + 21] = (port_b >> 16) & 0xff;
1312 p[48 + 22] = (port_b >> 8) & 0xff;
1313 p[48 + 23] = port_b & 0xff;
1314 if (1 == pcontrol)
1315 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
1316 return sizeof(sas_pcd_m_pg);
1317 }
1318
1319 static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol)
1320 { /* SAS SSP shared protocol specific port mode subpage */
1321 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
1322 0, 0, 0, 0, 0, 0, 0, 0,
1323 };
1324
1325 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
1326 if (1 == pcontrol)
1327 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
1328 return sizeof(sas_sha_m_pg);
1329 }
1330
1331 #define SDEBUG_MAX_MSENSE_SZ 256
1332
1333 static int resp_mode_sense(struct scsi_cmnd * scp, int target,
1334 struct sdebug_dev_info * devip)
1335 {
1336 unsigned char dbd, llbaa;
1337 int pcontrol, pcode, subpcode, bd_len;
1338 unsigned char dev_spec;
1339 int k, alloc_len, msense_6, offset, len, errsts, target_dev_id;
1340 unsigned char * ap;
1341 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
1342 unsigned char *cmd = (unsigned char *)scp->cmnd;
1343
1344 if ((errsts = check_readiness(scp, 1, devip)))
1345 return errsts;
1346 dbd = !!(cmd[1] & 0x8);
1347 pcontrol = (cmd[2] & 0xc0) >> 6;
1348 pcode = cmd[2] & 0x3f;
1349 subpcode = cmd[3];
1350 msense_6 = (MODE_SENSE == cmd[0]);
1351 llbaa = msense_6 ? 0 : !!(cmd[1] & 0x10);
1352 if ((0 == scsi_debug_ptype) && (0 == dbd))
1353 bd_len = llbaa ? 16 : 8;
1354 else
1355 bd_len = 0;
1356 alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]);
1357 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
1358 if (0x3 == pcontrol) { /* Saving values not supported */
1359 mk_sense_buffer(devip, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP,
1360 0);
1361 return check_condition_result;
1362 }
1363 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
1364 (devip->target * 1000) - 3;
1365 /* set DPOFUA bit for disks */
1366 if (0 == scsi_debug_ptype)
1367 dev_spec = (DEV_READONLY(target) ? 0x80 : 0x0) | 0x10;
1368 else
1369 dev_spec = 0x0;
1370 if (msense_6) {
1371 arr[2] = dev_spec;
1372 arr[3] = bd_len;
1373 offset = 4;
1374 } else {
1375 arr[3] = dev_spec;
1376 if (16 == bd_len)
1377 arr[4] = 0x1; /* set LONGLBA bit */
1378 arr[7] = bd_len; /* assume 255 or less */
1379 offset = 8;
1380 }
1381 ap = arr + offset;
1382 if ((bd_len > 0) && (!sdebug_capacity))
1383 sdebug_capacity = get_sdebug_capacity();
1384
1385 if (8 == bd_len) {
1386 if (sdebug_capacity > 0xfffffffe) {
1387 ap[0] = 0xff;
1388 ap[1] = 0xff;
1389 ap[2] = 0xff;
1390 ap[3] = 0xff;
1391 } else {
1392 ap[0] = (sdebug_capacity >> 24) & 0xff;
1393 ap[1] = (sdebug_capacity >> 16) & 0xff;
1394 ap[2] = (sdebug_capacity >> 8) & 0xff;
1395 ap[3] = sdebug_capacity & 0xff;
1396 }
1397 ap[6] = (scsi_debug_sector_size >> 8) & 0xff;
1398 ap[7] = scsi_debug_sector_size & 0xff;
1399 offset += bd_len;
1400 ap = arr + offset;
1401 } else if (16 == bd_len) {
1402 unsigned long long capac = sdebug_capacity;
1403
1404 for (k = 0; k < 8; ++k, capac >>= 8)
1405 ap[7 - k] = capac & 0xff;
1406 ap[12] = (scsi_debug_sector_size >> 24) & 0xff;
1407 ap[13] = (scsi_debug_sector_size >> 16) & 0xff;
1408 ap[14] = (scsi_debug_sector_size >> 8) & 0xff;
1409 ap[15] = scsi_debug_sector_size & 0xff;
1410 offset += bd_len;
1411 ap = arr + offset;
1412 }
1413
1414 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
1415 /* TODO: Control Extension page */
1416 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
1417 0);
1418 return check_condition_result;
1419 }
1420 switch (pcode) {
1421 case 0x1: /* Read-Write error recovery page, direct access */
1422 len = resp_err_recov_pg(ap, pcontrol, target);
1423 offset += len;
1424 break;
1425 case 0x2: /* Disconnect-Reconnect page, all devices */
1426 len = resp_disconnect_pg(ap, pcontrol, target);
1427 offset += len;
1428 break;
1429 case 0x3: /* Format device page, direct access */
1430 len = resp_format_pg(ap, pcontrol, target);
1431 offset += len;
1432 break;
1433 case 0x8: /* Caching page, direct access */
1434 len = resp_caching_pg(ap, pcontrol, target);
1435 offset += len;
1436 break;
1437 case 0xa: /* Control Mode page, all devices */
1438 len = resp_ctrl_m_pg(ap, pcontrol, target);
1439 offset += len;
1440 break;
1441 case 0x19: /* if spc==1 then sas phy, control+discover */
1442 if ((subpcode > 0x2) && (subpcode < 0xff)) {
1443 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1444 INVALID_FIELD_IN_CDB, 0);
1445 return check_condition_result;
1446 }
1447 len = 0;
1448 if ((0x0 == subpcode) || (0xff == subpcode))
1449 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
1450 if ((0x1 == subpcode) || (0xff == subpcode))
1451 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
1452 target_dev_id);
1453 if ((0x2 == subpcode) || (0xff == subpcode))
1454 len += resp_sas_sha_m_spg(ap + len, pcontrol);
1455 offset += len;
1456 break;
1457 case 0x1c: /* Informational Exceptions Mode page, all devices */
1458 len = resp_iec_m_pg(ap, pcontrol, target);
1459 offset += len;
1460 break;
1461 case 0x3f: /* Read all Mode pages */
1462 if ((0 == subpcode) || (0xff == subpcode)) {
1463 len = resp_err_recov_pg(ap, pcontrol, target);
1464 len += resp_disconnect_pg(ap + len, pcontrol, target);
1465 len += resp_format_pg(ap + len, pcontrol, target);
1466 len += resp_caching_pg(ap + len, pcontrol, target);
1467 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
1468 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
1469 if (0xff == subpcode) {
1470 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
1471 target, target_dev_id);
1472 len += resp_sas_sha_m_spg(ap + len, pcontrol);
1473 }
1474 len += resp_iec_m_pg(ap + len, pcontrol, target);
1475 } else {
1476 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1477 INVALID_FIELD_IN_CDB, 0);
1478 return check_condition_result;
1479 }
1480 offset += len;
1481 break;
1482 default:
1483 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
1484 0);
1485 return check_condition_result;
1486 }
1487 if (msense_6)
1488 arr[0] = offset - 1;
1489 else {
1490 arr[0] = ((offset - 2) >> 8) & 0xff;
1491 arr[1] = (offset - 2) & 0xff;
1492 }
1493 return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
1494 }
1495
1496 #define SDEBUG_MAX_MSELECT_SZ 512
1497
1498 static int resp_mode_select(struct scsi_cmnd * scp, int mselect6,
1499 struct sdebug_dev_info * devip)
1500 {
1501 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
1502 int param_len, res, errsts, mpage;
1503 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
1504 unsigned char *cmd = (unsigned char *)scp->cmnd;
1505
1506 if ((errsts = check_readiness(scp, 1, devip)))
1507 return errsts;
1508 memset(arr, 0, sizeof(arr));
1509 pf = cmd[1] & 0x10;
1510 sp = cmd[1] & 0x1;
1511 param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]);
1512 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
1513 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1514 INVALID_FIELD_IN_CDB, 0);
1515 return check_condition_result;
1516 }
1517 res = fetch_to_dev_buffer(scp, arr, param_len);
1518 if (-1 == res)
1519 return (DID_ERROR << 16);
1520 else if ((res < param_len) &&
1521 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
1522 printk(KERN_INFO "scsi_debug: mode_select: cdb indicated=%d, "
1523 " IO sent=%d bytes\n", param_len, res);
1524 md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2);
1525 bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]);
1526 if (md_len > 2) {
1527 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1528 INVALID_FIELD_IN_PARAM_LIST, 0);
1529 return check_condition_result;
1530 }
1531 off = bd_len + (mselect6 ? 4 : 8);
1532 mpage = arr[off] & 0x3f;
1533 ps = !!(arr[off] & 0x80);
1534 if (ps) {
1535 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1536 INVALID_FIELD_IN_PARAM_LIST, 0);
1537 return check_condition_result;
1538 }
1539 spf = !!(arr[off] & 0x40);
1540 pg_len = spf ? ((arr[off + 2] << 8) + arr[off + 3] + 4) :
1541 (arr[off + 1] + 2);
1542 if ((pg_len + off) > param_len) {
1543 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1544 PARAMETER_LIST_LENGTH_ERR, 0);
1545 return check_condition_result;
1546 }
1547 switch (mpage) {
1548 case 0xa: /* Control Mode page */
1549 if (ctrl_m_pg[1] == arr[off + 1]) {
1550 memcpy(ctrl_m_pg + 2, arr + off + 2,
1551 sizeof(ctrl_m_pg) - 2);
1552 scsi_debug_dsense = !!(ctrl_m_pg[2] & 0x4);
1553 return 0;
1554 }
1555 break;
1556 case 0x1c: /* Informational Exceptions Mode page */
1557 if (iec_m_pg[1] == arr[off + 1]) {
1558 memcpy(iec_m_pg + 2, arr + off + 2,
1559 sizeof(iec_m_pg) - 2);
1560 return 0;
1561 }
1562 break;
1563 default:
1564 break;
1565 }
1566 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1567 INVALID_FIELD_IN_PARAM_LIST, 0);
1568 return check_condition_result;
1569 }
1570
1571 static int resp_temp_l_pg(unsigned char * arr)
1572 {
1573 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
1574 0x0, 0x1, 0x3, 0x2, 0x0, 65,
1575 };
1576
1577 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
1578 return sizeof(temp_l_pg);
1579 }
1580
1581 static int resp_ie_l_pg(unsigned char * arr)
1582 {
1583 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
1584 };
1585
1586 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
1587 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
1588 arr[4] = THRESHOLD_EXCEEDED;
1589 arr[5] = 0xff;
1590 }
1591 return sizeof(ie_l_pg);
1592 }
1593
1594 #define SDEBUG_MAX_LSENSE_SZ 512
1595
1596 static int resp_log_sense(struct scsi_cmnd * scp,
1597 struct sdebug_dev_info * devip)
1598 {
1599 int ppc, sp, pcontrol, pcode, subpcode, alloc_len, errsts, len, n;
1600 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
1601 unsigned char *cmd = (unsigned char *)scp->cmnd;
1602
1603 if ((errsts = check_readiness(scp, 1, devip)))
1604 return errsts;
1605 memset(arr, 0, sizeof(arr));
1606 ppc = cmd[1] & 0x2;
1607 sp = cmd[1] & 0x1;
1608 if (ppc || sp) {
1609 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1610 INVALID_FIELD_IN_CDB, 0);
1611 return check_condition_result;
1612 }
1613 pcontrol = (cmd[2] & 0xc0) >> 6;
1614 pcode = cmd[2] & 0x3f;
1615 subpcode = cmd[3] & 0xff;
1616 alloc_len = (cmd[7] << 8) + cmd[8];
1617 arr[0] = pcode;
1618 if (0 == subpcode) {
1619 switch (pcode) {
1620 case 0x0: /* Supported log pages log page */
1621 n = 4;
1622 arr[n++] = 0x0; /* this page */
1623 arr[n++] = 0xd; /* Temperature */
1624 arr[n++] = 0x2f; /* Informational exceptions */
1625 arr[3] = n - 4;
1626 break;
1627 case 0xd: /* Temperature log page */
1628 arr[3] = resp_temp_l_pg(arr + 4);
1629 break;
1630 case 0x2f: /* Informational exceptions log page */
1631 arr[3] = resp_ie_l_pg(arr + 4);
1632 break;
1633 default:
1634 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1635 INVALID_FIELD_IN_CDB, 0);
1636 return check_condition_result;
1637 }
1638 } else if (0xff == subpcode) {
1639 arr[0] |= 0x40;
1640 arr[1] = subpcode;
1641 switch (pcode) {
1642 case 0x0: /* Supported log pages and subpages log page */
1643 n = 4;
1644 arr[n++] = 0x0;
1645 arr[n++] = 0x0; /* 0,0 page */
1646 arr[n++] = 0x0;
1647 arr[n++] = 0xff; /* this page */
1648 arr[n++] = 0xd;
1649 arr[n++] = 0x0; /* Temperature */
1650 arr[n++] = 0x2f;
1651 arr[n++] = 0x0; /* Informational exceptions */
1652 arr[3] = n - 4;
1653 break;
1654 case 0xd: /* Temperature subpages */
1655 n = 4;
1656 arr[n++] = 0xd;
1657 arr[n++] = 0x0; /* Temperature */
1658 arr[3] = n - 4;
1659 break;
1660 case 0x2f: /* Informational exceptions subpages */
1661 n = 4;
1662 arr[n++] = 0x2f;
1663 arr[n++] = 0x0; /* Informational exceptions */
1664 arr[3] = n - 4;
1665 break;
1666 default:
1667 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1668 INVALID_FIELD_IN_CDB, 0);
1669 return check_condition_result;
1670 }
1671 } else {
1672 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1673 INVALID_FIELD_IN_CDB, 0);
1674 return check_condition_result;
1675 }
1676 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
1677 return fill_from_dev_buffer(scp, arr,
1678 min(len, SDEBUG_MAX_INQ_ARR_SZ));
1679 }
1680
1681 static int check_device_access_params(struct sdebug_dev_info *devi,
1682 unsigned long long lba, unsigned int num)
1683 {
1684 if (lba + num > sdebug_capacity) {
1685 mk_sense_buffer(devi, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE, 0);
1686 return check_condition_result;
1687 }
1688 /* transfer length excessive (tie in to block limits VPD page) */
1689 if (num > sdebug_store_sectors) {
1690 mk_sense_buffer(devi, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
1691 return check_condition_result;
1692 }
1693 return 0;
1694 }
1695
1696 static int do_device_access(struct scsi_cmnd *scmd,
1697 struct sdebug_dev_info *devi,
1698 unsigned long long lba, unsigned int num, int write)
1699 {
1700 int ret;
1701 unsigned long long block, rest = 0;
1702 int (*func)(struct scsi_cmnd *, unsigned char *, int);
1703
1704 func = write ? fetch_to_dev_buffer : fill_from_dev_buffer;
1705
1706 block = do_div(lba, sdebug_store_sectors);
1707 if (block + num > sdebug_store_sectors)
1708 rest = block + num - sdebug_store_sectors;
1709
1710 ret = func(scmd, fake_storep + (block * scsi_debug_sector_size),
1711 (num - rest) * scsi_debug_sector_size);
1712 if (!ret && rest)
1713 ret = func(scmd, fake_storep, rest * scsi_debug_sector_size);
1714
1715 return ret;
1716 }
1717
1718 static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
1719 unsigned int sectors, u32 ei_lba)
1720 {
1721 unsigned int i, resid;
1722 struct scatterlist *psgl;
1723 struct sd_dif_tuple *sdt;
1724 sector_t sector;
1725 sector_t tmp_sec = start_sec;
1726 void *paddr;
1727
1728 start_sec = do_div(tmp_sec, sdebug_store_sectors);
1729
1730 sdt = (struct sd_dif_tuple *)(dif_storep + dif_offset(start_sec));
1731
1732 for (i = 0 ; i < sectors ; i++) {
1733 u16 csum;
1734
1735 if (sdt[i].app_tag == 0xffff)
1736 continue;
1737
1738 sector = start_sec + i;
1739
1740 switch (scsi_debug_guard) {
1741 case 1:
1742 csum = ip_compute_csum(fake_storep +
1743 sector * scsi_debug_sector_size,
1744 scsi_debug_sector_size);
1745 break;
1746 case 0:
1747 csum = crc_t10dif(fake_storep +
1748 sector * scsi_debug_sector_size,
1749 scsi_debug_sector_size);
1750 csum = cpu_to_be16(csum);
1751 break;
1752 default:
1753 BUG();
1754 }
1755
1756 if (sdt[i].guard_tag != csum) {
1757 printk(KERN_ERR "%s: GUARD check failed on sector %lu" \
1758 " rcvd 0x%04x, data 0x%04x\n", __func__,
1759 (unsigned long)sector,
1760 be16_to_cpu(sdt[i].guard_tag),
1761 be16_to_cpu(csum));
1762 dif_errors++;
1763 return 0x01;
1764 }
1765
1766 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION &&
1767 be32_to_cpu(sdt[i].ref_tag) != (sector & 0xffffffff)) {
1768 printk(KERN_ERR "%s: REF check failed on sector %lu\n",
1769 __func__, (unsigned long)sector);
1770 dif_errors++;
1771 return 0x03;
1772 }
1773
1774 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
1775 be32_to_cpu(sdt[i].ref_tag) != ei_lba) {
1776 printk(KERN_ERR "%s: REF check failed on sector %lu\n",
1777 __func__, (unsigned long)sector);
1778 dif_errors++;
1779 return 0x03;
1780 }
1781
1782 ei_lba++;
1783 }
1784
1785 resid = sectors * 8; /* Bytes of protection data to copy into sgl */
1786 sector = start_sec;
1787
1788 scsi_for_each_prot_sg(SCpnt, psgl, scsi_prot_sg_count(SCpnt), i) {
1789 int len = min(psgl->length, resid);
1790
1791 paddr = kmap_atomic(sg_page(psgl)) + psgl->offset;
1792 memcpy(paddr, dif_storep + dif_offset(sector), len);
1793
1794 sector += len >> 3;
1795 if (sector >= sdebug_store_sectors) {
1796 /* Force wrap */
1797 tmp_sec = sector;
1798 sector = do_div(tmp_sec, sdebug_store_sectors);
1799 }
1800 resid -= len;
1801 kunmap_atomic(paddr);
1802 }
1803
1804 dix_reads++;
1805
1806 return 0;
1807 }
1808
1809 static int resp_read(struct scsi_cmnd *SCpnt, unsigned long long lba,
1810 unsigned int num, struct sdebug_dev_info *devip,
1811 u32 ei_lba)
1812 {
1813 unsigned long iflags;
1814 int ret;
1815
1816 ret = check_device_access_params(devip, lba, num);
1817 if (ret)
1818 return ret;
1819
1820 if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) &&
1821 (lba <= (OPT_MEDIUM_ERR_ADDR + OPT_MEDIUM_ERR_NUM - 1)) &&
1822 ((lba + num) > OPT_MEDIUM_ERR_ADDR)) {
1823 /* claim unrecoverable read error */
1824 mk_sense_buffer(devip, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
1825 /* set info field and valid bit for fixed descriptor */
1826 if (0x70 == (devip->sense_buff[0] & 0x7f)) {
1827 devip->sense_buff[0] |= 0x80; /* Valid bit */
1828 ret = (lba < OPT_MEDIUM_ERR_ADDR)
1829 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
1830 devip->sense_buff[3] = (ret >> 24) & 0xff;
1831 devip->sense_buff[4] = (ret >> 16) & 0xff;
1832 devip->sense_buff[5] = (ret >> 8) & 0xff;
1833 devip->sense_buff[6] = ret & 0xff;
1834 }
1835 scsi_set_resid(SCpnt, scsi_bufflen(SCpnt));
1836 return check_condition_result;
1837 }
1838
1839 /* DIX + T10 DIF */
1840 if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
1841 int prot_ret = prot_verify_read(SCpnt, lba, num, ei_lba);
1842
1843 if (prot_ret) {
1844 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, prot_ret);
1845 return illegal_condition_result;
1846 }
1847 }
1848
1849 read_lock_irqsave(&atomic_rw, iflags);
1850 ret = do_device_access(SCpnt, devip, lba, num, 0);
1851 read_unlock_irqrestore(&atomic_rw, iflags);
1852 return ret;
1853 }
1854
1855 void dump_sector(unsigned char *buf, int len)
1856 {
1857 int i, j;
1858
1859 printk(KERN_ERR ">>> Sector Dump <<<\n");
1860
1861 for (i = 0 ; i < len ; i += 16) {
1862 printk(KERN_ERR "%04d: ", i);
1863
1864 for (j = 0 ; j < 16 ; j++) {
1865 unsigned char c = buf[i+j];
1866 if (c >= 0x20 && c < 0x7e)
1867 printk(" %c ", buf[i+j]);
1868 else
1869 printk("%02x ", buf[i+j]);
1870 }
1871
1872 printk("\n");
1873 }
1874 }
1875
1876 static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
1877 unsigned int sectors, u32 ei_lba)
1878 {
1879 int i, j, ret;
1880 struct sd_dif_tuple *sdt;
1881 struct scatterlist *dsgl = scsi_sglist(SCpnt);
1882 struct scatterlist *psgl = scsi_prot_sglist(SCpnt);
1883 void *daddr, *paddr;
1884 sector_t tmp_sec = start_sec;
1885 sector_t sector;
1886 int ppage_offset;
1887 unsigned short csum;
1888
1889 sector = do_div(tmp_sec, sdebug_store_sectors);
1890
1891 BUG_ON(scsi_sg_count(SCpnt) == 0);
1892 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
1893
1894 paddr = kmap_atomic(sg_page(psgl)) + psgl->offset;
1895 ppage_offset = 0;
1896
1897 /* For each data page */
1898 scsi_for_each_sg(SCpnt, dsgl, scsi_sg_count(SCpnt), i) {
1899 daddr = kmap_atomic(sg_page(dsgl)) + dsgl->offset;
1900
1901 /* For each sector-sized chunk in data page */
1902 for (j = 0 ; j < dsgl->length ; j += scsi_debug_sector_size) {
1903
1904 /* If we're at the end of the current
1905 * protection page advance to the next one
1906 */
1907 if (ppage_offset >= psgl->length) {
1908 kunmap_atomic(paddr);
1909 psgl = sg_next(psgl);
1910 BUG_ON(psgl == NULL);
1911 paddr = kmap_atomic(sg_page(psgl))
1912 + psgl->offset;
1913 ppage_offset = 0;
1914 }
1915
1916 sdt = paddr + ppage_offset;
1917
1918 switch (scsi_debug_guard) {
1919 case 1:
1920 csum = ip_compute_csum(daddr,
1921 scsi_debug_sector_size);
1922 break;
1923 case 0:
1924 csum = cpu_to_be16(crc_t10dif(daddr,
1925 scsi_debug_sector_size));
1926 break;
1927 default:
1928 BUG();
1929 ret = 0;
1930 goto out;
1931 }
1932
1933 if (sdt->guard_tag != csum) {
1934 printk(KERN_ERR
1935 "%s: GUARD check failed on sector %lu " \
1936 "rcvd 0x%04x, calculated 0x%04x\n",
1937 __func__, (unsigned long)sector,
1938 be16_to_cpu(sdt->guard_tag),
1939 be16_to_cpu(csum));
1940 ret = 0x01;
1941 dump_sector(daddr, scsi_debug_sector_size);
1942 goto out;
1943 }
1944
1945 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION &&
1946 be32_to_cpu(sdt->ref_tag)
1947 != (start_sec & 0xffffffff)) {
1948 printk(KERN_ERR
1949 "%s: REF check failed on sector %lu\n",
1950 __func__, (unsigned long)sector);
1951 ret = 0x03;
1952 dump_sector(daddr, scsi_debug_sector_size);
1953 goto out;
1954 }
1955
1956 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
1957 be32_to_cpu(sdt->ref_tag) != ei_lba) {
1958 printk(KERN_ERR
1959 "%s: REF check failed on sector %lu\n",
1960 __func__, (unsigned long)sector);
1961 ret = 0x03;
1962 dump_sector(daddr, scsi_debug_sector_size);
1963 goto out;
1964 }
1965
1966 /* Would be great to copy this in bigger
1967 * chunks. However, for the sake of
1968 * correctness we need to verify each sector
1969 * before writing it to "stable" storage
1970 */
1971 memcpy(dif_storep + dif_offset(sector), sdt, 8);
1972
1973 sector++;
1974
1975 if (sector == sdebug_store_sectors)
1976 sector = 0; /* Force wrap */
1977
1978 start_sec++;
1979 ei_lba++;
1980 daddr += scsi_debug_sector_size;
1981 ppage_offset += sizeof(struct sd_dif_tuple);
1982 }
1983
1984 kunmap_atomic(daddr);
1985 }
1986
1987 kunmap_atomic(paddr);
1988
1989 dix_writes++;
1990
1991 return 0;
1992
1993 out:
1994 dif_errors++;
1995 kunmap_atomic(daddr);
1996 kunmap_atomic(paddr);
1997 return ret;
1998 }
1999
2000 static unsigned long lba_to_map_index(sector_t lba)
2001 {
2002 if (scsi_debug_unmap_alignment) {
2003 lba += scsi_debug_unmap_granularity -
2004 scsi_debug_unmap_alignment;
2005 }
2006 do_div(lba, scsi_debug_unmap_granularity);
2007
2008 return lba;
2009 }
2010
2011 static sector_t map_index_to_lba(unsigned long index)
2012 {
2013 return index * scsi_debug_unmap_granularity -
2014 scsi_debug_unmap_alignment;
2015 }
2016
2017 static unsigned int map_state(sector_t lba, unsigned int *num)
2018 {
2019 sector_t end;
2020 unsigned int mapped;
2021 unsigned long index;
2022 unsigned long next;
2023
2024 index = lba_to_map_index(lba);
2025 mapped = test_bit(index, map_storep);
2026
2027 if (mapped)
2028 next = find_next_zero_bit(map_storep, map_size, index);
2029 else
2030 next = find_next_bit(map_storep, map_size, index);
2031
2032 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
2033 *num = end - lba;
2034
2035 return mapped;
2036 }
2037
2038 static void map_region(sector_t lba, unsigned int len)
2039 {
2040 sector_t end = lba + len;
2041
2042 while (lba < end) {
2043 unsigned long index = lba_to_map_index(lba);
2044
2045 if (index < map_size)
2046 set_bit(index, map_storep);
2047
2048 lba = map_index_to_lba(index + 1);
2049 }
2050 }
2051
2052 static void unmap_region(sector_t lba, unsigned int len)
2053 {
2054 sector_t end = lba + len;
2055
2056 while (lba < end) {
2057 unsigned long index = lba_to_map_index(lba);
2058
2059 if (lba == map_index_to_lba(index) &&
2060 lba + scsi_debug_unmap_granularity <= end &&
2061 index < map_size) {
2062 clear_bit(index, map_storep);
2063 if (scsi_debug_lbprz) {
2064 memset(fake_storep +
2065 lba * scsi_debug_sector_size, 0,
2066 scsi_debug_sector_size *
2067 scsi_debug_unmap_granularity);
2068 }
2069 }
2070 lba = map_index_to_lba(index + 1);
2071 }
2072 }
2073
2074 static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba,
2075 unsigned int num, struct sdebug_dev_info *devip,
2076 u32 ei_lba)
2077 {
2078 unsigned long iflags;
2079 int ret;
2080
2081 ret = check_device_access_params(devip, lba, num);
2082 if (ret)
2083 return ret;
2084
2085 /* DIX + T10 DIF */
2086 if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
2087 int prot_ret = prot_verify_write(SCpnt, lba, num, ei_lba);
2088
2089 if (prot_ret) {
2090 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, prot_ret);
2091 return illegal_condition_result;
2092 }
2093 }
2094
2095 write_lock_irqsave(&atomic_rw, iflags);
2096 ret = do_device_access(SCpnt, devip, lba, num, 1);
2097 if (scsi_debug_lbp())
2098 map_region(lba, num);
2099 write_unlock_irqrestore(&atomic_rw, iflags);
2100 if (-1 == ret)
2101 return (DID_ERROR << 16);
2102 else if ((ret < (num * scsi_debug_sector_size)) &&
2103 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2104 printk(KERN_INFO "scsi_debug: write: cdb indicated=%u, "
2105 " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret);
2106
2107 return 0;
2108 }
2109
2110 static int resp_write_same(struct scsi_cmnd *scmd, unsigned long long lba,
2111 unsigned int num, struct sdebug_dev_info *devip,
2112 u32 ei_lba, unsigned int unmap)
2113 {
2114 unsigned long iflags;
2115 unsigned long long i;
2116 int ret;
2117
2118 ret = check_device_access_params(devip, lba, num);
2119 if (ret)
2120 return ret;
2121
2122 if (num > scsi_debug_write_same_length) {
2123 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
2124 0);
2125 return check_condition_result;
2126 }
2127
2128 write_lock_irqsave(&atomic_rw, iflags);
2129
2130 if (unmap && scsi_debug_lbp()) {
2131 unmap_region(lba, num);
2132 goto out;
2133 }
2134
2135 /* Else fetch one logical block */
2136 ret = fetch_to_dev_buffer(scmd,
2137 fake_storep + (lba * scsi_debug_sector_size),
2138 scsi_debug_sector_size);
2139
2140 if (-1 == ret) {
2141 write_unlock_irqrestore(&atomic_rw, iflags);
2142 return (DID_ERROR << 16);
2143 } else if ((ret < (num * scsi_debug_sector_size)) &&
2144 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2145 printk(KERN_INFO "scsi_debug: write same: cdb indicated=%u, "
2146 " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret);
2147
2148 /* Copy first sector to remaining blocks */
2149 for (i = 1 ; i < num ; i++)
2150 memcpy(fake_storep + ((lba + i) * scsi_debug_sector_size),
2151 fake_storep + (lba * scsi_debug_sector_size),
2152 scsi_debug_sector_size);
2153
2154 if (scsi_debug_lbp())
2155 map_region(lba, num);
2156 out:
2157 write_unlock_irqrestore(&atomic_rw, iflags);
2158
2159 return 0;
2160 }
2161
2162 struct unmap_block_desc {
2163 __be64 lba;
2164 __be32 blocks;
2165 __be32 __reserved;
2166 };
2167
2168 static int resp_unmap(struct scsi_cmnd * scmd, struct sdebug_dev_info * devip)
2169 {
2170 unsigned char *buf;
2171 struct unmap_block_desc *desc;
2172 unsigned int i, payload_len, descriptors;
2173 int ret;
2174
2175 ret = check_readiness(scmd, 1, devip);
2176 if (ret)
2177 return ret;
2178
2179 payload_len = get_unaligned_be16(&scmd->cmnd[7]);
2180 BUG_ON(scsi_bufflen(scmd) != payload_len);
2181
2182 descriptors = (payload_len - 8) / 16;
2183
2184 buf = kmalloc(scsi_bufflen(scmd), GFP_ATOMIC);
2185 if (!buf)
2186 return check_condition_result;
2187
2188 scsi_sg_copy_to_buffer(scmd, buf, scsi_bufflen(scmd));
2189
2190 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
2191 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
2192
2193 desc = (void *)&buf[8];
2194
2195 for (i = 0 ; i < descriptors ; i++) {
2196 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
2197 unsigned int num = get_unaligned_be32(&desc[i].blocks);
2198
2199 ret = check_device_access_params(devip, lba, num);
2200 if (ret)
2201 goto out;
2202
2203 unmap_region(lba, num);
2204 }
2205
2206 ret = 0;
2207
2208 out:
2209 kfree(buf);
2210
2211 return ret;
2212 }
2213
2214 #define SDEBUG_GET_LBA_STATUS_LEN 32
2215
2216 static int resp_get_lba_status(struct scsi_cmnd * scmd,
2217 struct sdebug_dev_info * devip)
2218 {
2219 unsigned long long lba;
2220 unsigned int alloc_len, mapped, num;
2221 unsigned char arr[SDEBUG_GET_LBA_STATUS_LEN];
2222 int ret;
2223
2224 ret = check_readiness(scmd, 1, devip);
2225 if (ret)
2226 return ret;
2227
2228 lba = get_unaligned_be64(&scmd->cmnd[2]);
2229 alloc_len = get_unaligned_be32(&scmd->cmnd[10]);
2230
2231 if (alloc_len < 24)
2232 return 0;
2233
2234 ret = check_device_access_params(devip, lba, 1);
2235 if (ret)
2236 return ret;
2237
2238 mapped = map_state(lba, &num);
2239
2240 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
2241 put_unaligned_be32(20, &arr[0]); /* Parameter Data Length */
2242 put_unaligned_be64(lba, &arr[8]); /* LBA */
2243 put_unaligned_be32(num, &arr[16]); /* Number of blocks */
2244 arr[20] = !mapped; /* mapped = 0, unmapped = 1 */
2245
2246 return fill_from_dev_buffer(scmd, arr, SDEBUG_GET_LBA_STATUS_LEN);
2247 }
2248
2249 #define SDEBUG_RLUN_ARR_SZ 256
2250
2251 static int resp_report_luns(struct scsi_cmnd * scp,
2252 struct sdebug_dev_info * devip)
2253 {
2254 unsigned int alloc_len;
2255 int lun_cnt, i, upper, num, n, wlun, lun;
2256 unsigned char *cmd = (unsigned char *)scp->cmnd;
2257 int select_report = (int)cmd[2];
2258 struct scsi_lun *one_lun;
2259 unsigned char arr[SDEBUG_RLUN_ARR_SZ];
2260 unsigned char * max_addr;
2261
2262 alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
2263 if ((alloc_len < 4) || (select_report > 2)) {
2264 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
2265 0);
2266 return check_condition_result;
2267 }
2268 /* can produce response with up to 16k luns (lun 0 to lun 16383) */
2269 memset(arr, 0, SDEBUG_RLUN_ARR_SZ);
2270 lun_cnt = scsi_debug_max_luns;
2271 if (1 == select_report)
2272 lun_cnt = 0;
2273 else if (scsi_debug_no_lun_0 && (lun_cnt > 0))
2274 --lun_cnt;
2275 wlun = (select_report > 0) ? 1 : 0;
2276 num = lun_cnt + wlun;
2277 arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff;
2278 arr[3] = (sizeof(struct scsi_lun) * num) & 0xff;
2279 n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) /
2280 sizeof(struct scsi_lun)), num);
2281 if (n < num) {
2282 wlun = 0;
2283 lun_cnt = n;
2284 }
2285 one_lun = (struct scsi_lun *) &arr[8];
2286 max_addr = arr + SDEBUG_RLUN_ARR_SZ;
2287 for (i = 0, lun = (scsi_debug_no_lun_0 ? 1 : 0);
2288 ((i < lun_cnt) && ((unsigned char *)(one_lun + i) < max_addr));
2289 i++, lun++) {
2290 upper = (lun >> 8) & 0x3f;
2291 if (upper)
2292 one_lun[i].scsi_lun[0] =
2293 (upper | (SAM2_LUN_ADDRESS_METHOD << 6));
2294 one_lun[i].scsi_lun[1] = lun & 0xff;
2295 }
2296 if (wlun) {
2297 one_lun[i].scsi_lun[0] = (SAM2_WLUN_REPORT_LUNS >> 8) & 0xff;
2298 one_lun[i].scsi_lun[1] = SAM2_WLUN_REPORT_LUNS & 0xff;
2299 i++;
2300 }
2301 alloc_len = (unsigned char *)(one_lun + i) - arr;
2302 return fill_from_dev_buffer(scp, arr,
2303 min((int)alloc_len, SDEBUG_RLUN_ARR_SZ));
2304 }
2305
2306 static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
2307 unsigned int num, struct sdebug_dev_info *devip)
2308 {
2309 int i, j, ret = -1;
2310 unsigned char *kaddr, *buf;
2311 unsigned int offset;
2312 struct scatterlist *sg;
2313 struct scsi_data_buffer *sdb = scsi_in(scp);
2314
2315 /* better not to use temporary buffer. */
2316 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
2317 if (!buf)
2318 return ret;
2319
2320 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
2321
2322 offset = 0;
2323 for_each_sg(sdb->table.sgl, sg, sdb->table.nents, i) {
2324 kaddr = (unsigned char *)kmap_atomic(sg_page(sg));
2325 if (!kaddr)
2326 goto out;
2327
2328 for (j = 0; j < sg->length; j++)
2329 *(kaddr + sg->offset + j) ^= *(buf + offset + j);
2330
2331 offset += sg->length;
2332 kunmap_atomic(kaddr);
2333 }
2334 ret = 0;
2335 out:
2336 kfree(buf);
2337
2338 return ret;
2339 }
2340
2341 /* When timer goes off this function is called. */
2342 static void timer_intr_handler(unsigned long indx)
2343 {
2344 struct sdebug_queued_cmd * sqcp;
2345 unsigned long iflags;
2346
2347 if (indx >= scsi_debug_max_queue) {
2348 printk(KERN_ERR "scsi_debug:timer_intr_handler: indx too "
2349 "large\n");
2350 return;
2351 }
2352 spin_lock_irqsave(&queued_arr_lock, iflags);
2353 sqcp = &queued_arr[(int)indx];
2354 if (! sqcp->in_use) {
2355 printk(KERN_ERR "scsi_debug:timer_intr_handler: Unexpected "
2356 "interrupt\n");
2357 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2358 return;
2359 }
2360 sqcp->in_use = 0;
2361 if (sqcp->done_funct) {
2362 sqcp->a_cmnd->result = sqcp->scsi_result;
2363 sqcp->done_funct(sqcp->a_cmnd); /* callback to mid level */
2364 }
2365 sqcp->done_funct = NULL;
2366 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2367 }
2368
2369
2370 static struct sdebug_dev_info *
2371 sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags)
2372 {
2373 struct sdebug_dev_info *devip;
2374
2375 devip = kzalloc(sizeof(*devip), flags);
2376 if (devip) {
2377 devip->sdbg_host = sdbg_host;
2378 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
2379 }
2380 return devip;
2381 }
2382
2383 static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev)
2384 {
2385 struct sdebug_host_info * sdbg_host;
2386 struct sdebug_dev_info * open_devip = NULL;
2387 struct sdebug_dev_info * devip =
2388 (struct sdebug_dev_info *)sdev->hostdata;
2389
2390 if (devip)
2391 return devip;
2392 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
2393 if (!sdbg_host) {
2394 printk(KERN_ERR "Host info NULL\n");
2395 return NULL;
2396 }
2397 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
2398 if ((devip->used) && (devip->channel == sdev->channel) &&
2399 (devip->target == sdev->id) &&
2400 (devip->lun == sdev->lun))
2401 return devip;
2402 else {
2403 if ((!devip->used) && (!open_devip))
2404 open_devip = devip;
2405 }
2406 }
2407 if (!open_devip) { /* try and make a new one */
2408 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
2409 if (!open_devip) {
2410 printk(KERN_ERR "%s: out of memory at line %d\n",
2411 __func__, __LINE__);
2412 return NULL;
2413 }
2414 }
2415
2416 open_devip->channel = sdev->channel;
2417 open_devip->target = sdev->id;
2418 open_devip->lun = sdev->lun;
2419 open_devip->sdbg_host = sdbg_host;
2420 open_devip->reset = 1;
2421 open_devip->used = 1;
2422 memset(open_devip->sense_buff, 0, SDEBUG_SENSE_LEN);
2423 if (scsi_debug_dsense)
2424 open_devip->sense_buff[0] = 0x72;
2425 else {
2426 open_devip->sense_buff[0] = 0x70;
2427 open_devip->sense_buff[7] = 0xa;
2428 }
2429 if (sdev->lun == SAM2_WLUN_REPORT_LUNS)
2430 open_devip->wlun = SAM2_WLUN_REPORT_LUNS & 0xff;
2431
2432 return open_devip;
2433 }
2434
2435 static int scsi_debug_slave_alloc(struct scsi_device *sdp)
2436 {
2437 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2438 printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %u>\n",
2439 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
2440 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue);
2441 return 0;
2442 }
2443
2444 static int scsi_debug_slave_configure(struct scsi_device *sdp)
2445 {
2446 struct sdebug_dev_info *devip;
2447
2448 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2449 printk(KERN_INFO "scsi_debug: slave_configure <%u %u %u %u>\n",
2450 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
2451 if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN)
2452 sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN;
2453 devip = devInfoReg(sdp);
2454 if (NULL == devip)
2455 return 1; /* no resources, will be marked offline */
2456 sdp->hostdata = devip;
2457 if (sdp->host->cmd_per_lun)
2458 scsi_adjust_queue_depth(sdp, SDEBUG_TAGGED_QUEUING,
2459 sdp->host->cmd_per_lun);
2460 blk_queue_max_segment_size(sdp->request_queue, 256 * 1024);
2461 if (scsi_debug_no_uld)
2462 sdp->no_uld_attach = 1;
2463 return 0;
2464 }
2465
2466 static void scsi_debug_slave_destroy(struct scsi_device *sdp)
2467 {
2468 struct sdebug_dev_info *devip =
2469 (struct sdebug_dev_info *)sdp->hostdata;
2470
2471 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2472 printk(KERN_INFO "scsi_debug: slave_destroy <%u %u %u %u>\n",
2473 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
2474 if (devip) {
2475 /* make this slot available for re-use */
2476 devip->used = 0;
2477 sdp->hostdata = NULL;
2478 }
2479 }
2480
2481 /* Returns 1 if found 'cmnd' and deleted its timer. else returns 0 */
2482 static int stop_queued_cmnd(struct scsi_cmnd *cmnd)
2483 {
2484 unsigned long iflags;
2485 int k;
2486 struct sdebug_queued_cmd *sqcp;
2487
2488 spin_lock_irqsave(&queued_arr_lock, iflags);
2489 for (k = 0; k < scsi_debug_max_queue; ++k) {
2490 sqcp = &queued_arr[k];
2491 if (sqcp->in_use && (cmnd == sqcp->a_cmnd)) {
2492 del_timer_sync(&sqcp->cmnd_timer);
2493 sqcp->in_use = 0;
2494 sqcp->a_cmnd = NULL;
2495 break;
2496 }
2497 }
2498 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2499 return (k < scsi_debug_max_queue) ? 1 : 0;
2500 }
2501
2502 /* Deletes (stops) timers of all queued commands */
2503 static void stop_all_queued(void)
2504 {
2505 unsigned long iflags;
2506 int k;
2507 struct sdebug_queued_cmd *sqcp;
2508
2509 spin_lock_irqsave(&queued_arr_lock, iflags);
2510 for (k = 0; k < scsi_debug_max_queue; ++k) {
2511 sqcp = &queued_arr[k];
2512 if (sqcp->in_use && sqcp->a_cmnd) {
2513 del_timer_sync(&sqcp->cmnd_timer);
2514 sqcp->in_use = 0;
2515 sqcp->a_cmnd = NULL;
2516 }
2517 }
2518 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2519 }
2520
2521 static int scsi_debug_abort(struct scsi_cmnd * SCpnt)
2522 {
2523 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2524 printk(KERN_INFO "scsi_debug: abort\n");
2525 ++num_aborts;
2526 stop_queued_cmnd(SCpnt);
2527 return SUCCESS;
2528 }
2529
2530 static int scsi_debug_biosparam(struct scsi_device *sdev,
2531 struct block_device * bdev, sector_t capacity, int *info)
2532 {
2533 int res;
2534 unsigned char *buf;
2535
2536 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2537 printk(KERN_INFO "scsi_debug: biosparam\n");
2538 buf = scsi_bios_ptable(bdev);
2539 if (buf) {
2540 res = scsi_partsize(buf, capacity,
2541 &info[2], &info[0], &info[1]);
2542 kfree(buf);
2543 if (! res)
2544 return res;
2545 }
2546 info[0] = sdebug_heads;
2547 info[1] = sdebug_sectors_per;
2548 info[2] = sdebug_cylinders_per;
2549 return 0;
2550 }
2551
2552 static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
2553 {
2554 struct sdebug_dev_info * devip;
2555
2556 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2557 printk(KERN_INFO "scsi_debug: device_reset\n");
2558 ++num_dev_resets;
2559 if (SCpnt) {
2560 devip = devInfoReg(SCpnt->device);
2561 if (devip)
2562 devip->reset = 1;
2563 }
2564 return SUCCESS;
2565 }
2566
2567 static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
2568 {
2569 struct sdebug_host_info *sdbg_host;
2570 struct sdebug_dev_info * dev_info;
2571 struct scsi_device * sdp;
2572 struct Scsi_Host * hp;
2573
2574 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2575 printk(KERN_INFO "scsi_debug: bus_reset\n");
2576 ++num_bus_resets;
2577 if (SCpnt && ((sdp = SCpnt->device)) && ((hp = sdp->host))) {
2578 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
2579 if (sdbg_host) {
2580 list_for_each_entry(dev_info,
2581 &sdbg_host->dev_info_list,
2582 dev_list)
2583 dev_info->reset = 1;
2584 }
2585 }
2586 return SUCCESS;
2587 }
2588
2589 static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
2590 {
2591 struct sdebug_host_info * sdbg_host;
2592 struct sdebug_dev_info * dev_info;
2593
2594 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2595 printk(KERN_INFO "scsi_debug: host_reset\n");
2596 ++num_host_resets;
2597 spin_lock(&sdebug_host_list_lock);
2598 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
2599 list_for_each_entry(dev_info, &sdbg_host->dev_info_list,
2600 dev_list)
2601 dev_info->reset = 1;
2602 }
2603 spin_unlock(&sdebug_host_list_lock);
2604 stop_all_queued();
2605 return SUCCESS;
2606 }
2607
2608 /* Initializes timers in queued array */
2609 static void __init init_all_queued(void)
2610 {
2611 unsigned long iflags;
2612 int k;
2613 struct sdebug_queued_cmd * sqcp;
2614
2615 spin_lock_irqsave(&queued_arr_lock, iflags);
2616 for (k = 0; k < scsi_debug_max_queue; ++k) {
2617 sqcp = &queued_arr[k];
2618 init_timer(&sqcp->cmnd_timer);
2619 sqcp->in_use = 0;
2620 sqcp->a_cmnd = NULL;
2621 }
2622 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2623 }
2624
2625 static void __init sdebug_build_parts(unsigned char *ramp,
2626 unsigned long store_size)
2627 {
2628 struct partition * pp;
2629 int starts[SDEBUG_MAX_PARTS + 2];
2630 int sectors_per_part, num_sectors, k;
2631 int heads_by_sects, start_sec, end_sec;
2632
2633 /* assume partition table already zeroed */
2634 if ((scsi_debug_num_parts < 1) || (store_size < 1048576))
2635 return;
2636 if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) {
2637 scsi_debug_num_parts = SDEBUG_MAX_PARTS;
2638 printk(KERN_WARNING "scsi_debug:build_parts: reducing "
2639 "partitions to %d\n", SDEBUG_MAX_PARTS);
2640 }
2641 num_sectors = (int)sdebug_store_sectors;
2642 sectors_per_part = (num_sectors - sdebug_sectors_per)
2643 / scsi_debug_num_parts;
2644 heads_by_sects = sdebug_heads * sdebug_sectors_per;
2645 starts[0] = sdebug_sectors_per;
2646 for (k = 1; k < scsi_debug_num_parts; ++k)
2647 starts[k] = ((k * sectors_per_part) / heads_by_sects)
2648 * heads_by_sects;
2649 starts[scsi_debug_num_parts] = num_sectors;
2650 starts[scsi_debug_num_parts + 1] = 0;
2651
2652 ramp[510] = 0x55; /* magic partition markings */
2653 ramp[511] = 0xAA;
2654 pp = (struct partition *)(ramp + 0x1be);
2655 for (k = 0; starts[k + 1]; ++k, ++pp) {
2656 start_sec = starts[k];
2657 end_sec = starts[k + 1] - 1;
2658 pp->boot_ind = 0;
2659
2660 pp->cyl = start_sec / heads_by_sects;
2661 pp->head = (start_sec - (pp->cyl * heads_by_sects))
2662 / sdebug_sectors_per;
2663 pp->sector = (start_sec % sdebug_sectors_per) + 1;
2664
2665 pp->end_cyl = end_sec / heads_by_sects;
2666 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
2667 / sdebug_sectors_per;
2668 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
2669
2670 pp->start_sect = start_sec;
2671 pp->nr_sects = end_sec - start_sec + 1;
2672 pp->sys_ind = 0x83; /* plain Linux partition */
2673 }
2674 }
2675
2676 static int schedule_resp(struct scsi_cmnd * cmnd,
2677 struct sdebug_dev_info * devip,
2678 done_funct_t done, int scsi_result, int delta_jiff)
2679 {
2680 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmnd) {
2681 if (scsi_result) {
2682 struct scsi_device * sdp = cmnd->device;
2683
2684 printk(KERN_INFO "scsi_debug: <%u %u %u %u> "
2685 "non-zero result=0x%x\n", sdp->host->host_no,
2686 sdp->channel, sdp->id, sdp->lun, scsi_result);
2687 }
2688 }
2689 if (cmnd && devip) {
2690 /* simulate autosense by this driver */
2691 if (SAM_STAT_CHECK_CONDITION == (scsi_result & 0xff))
2692 memcpy(cmnd->sense_buffer, devip->sense_buff,
2693 (SCSI_SENSE_BUFFERSIZE > SDEBUG_SENSE_LEN) ?
2694 SDEBUG_SENSE_LEN : SCSI_SENSE_BUFFERSIZE);
2695 }
2696 if (delta_jiff <= 0) {
2697 if (cmnd)
2698 cmnd->result = scsi_result;
2699 if (done)
2700 done(cmnd);
2701 return 0;
2702 } else {
2703 unsigned long iflags;
2704 int k;
2705 struct sdebug_queued_cmd * sqcp = NULL;
2706
2707 spin_lock_irqsave(&queued_arr_lock, iflags);
2708 for (k = 0; k < scsi_debug_max_queue; ++k) {
2709 sqcp = &queued_arr[k];
2710 if (! sqcp->in_use)
2711 break;
2712 }
2713 if (k >= scsi_debug_max_queue) {
2714 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2715 printk(KERN_WARNING "scsi_debug: can_queue exceeded\n");
2716 return 1; /* report busy to mid level */
2717 }
2718 sqcp->in_use = 1;
2719 sqcp->a_cmnd = cmnd;
2720 sqcp->scsi_result = scsi_result;
2721 sqcp->done_funct = done;
2722 sqcp->cmnd_timer.function = timer_intr_handler;
2723 sqcp->cmnd_timer.data = k;
2724 sqcp->cmnd_timer.expires = jiffies + delta_jiff;
2725 add_timer(&sqcp->cmnd_timer);
2726 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2727 if (cmnd)
2728 cmnd->result = 0;
2729 return 0;
2730 }
2731 }
2732 /* Note: The following macros create attribute files in the
2733 /sys/module/scsi_debug/parameters directory. Unfortunately this
2734 driver is unaware of a change and cannot trigger auxiliary actions
2735 as it can when the corresponding attribute in the
2736 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
2737 */
2738 module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR);
2739 module_param_named(ato, scsi_debug_ato, int, S_IRUGO);
2740 module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR);
2741 module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO);
2742 module_param_named(dif, scsi_debug_dif, int, S_IRUGO);
2743 module_param_named(dix, scsi_debug_dix, int, S_IRUGO);
2744 module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR);
2745 module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR);
2746 module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR);
2747 module_param_named(guard, scsi_debug_guard, int, S_IRUGO);
2748 module_param_named(lbpu, scsi_debug_lbpu, int, S_IRUGO);
2749 module_param_named(lbpws, scsi_debug_lbpws, int, S_IRUGO);
2750 module_param_named(lbpws10, scsi_debug_lbpws10, int, S_IRUGO);
2751 module_param_named(lbprz, scsi_debug_lbprz, int, S_IRUGO);
2752 module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO);
2753 module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR);
2754 module_param_named(max_queue, scsi_debug_max_queue, int, S_IRUGO | S_IWUSR);
2755 module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR);
2756 module_param_named(no_uld, scsi_debug_no_uld, int, S_IRUGO);
2757 module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO);
2758 module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR);
2759 module_param_named(opt_blks, scsi_debug_opt_blks, int, S_IRUGO);
2760 module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR);
2761 module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO);
2762 module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR);
2763 module_param_named(removable, scsi_debug_removable, bool, S_IRUGO | S_IWUSR);
2764 module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO);
2765 module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO);
2766 module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO);
2767 module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO);
2768 module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO);
2769 module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, int, S_IRUGO);
2770 module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR);
2771 module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int,
2772 S_IRUGO | S_IWUSR);
2773 module_param_named(write_same_length, scsi_debug_write_same_length, int,
2774 S_IRUGO | S_IWUSR);
2775
2776 MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
2777 MODULE_DESCRIPTION("SCSI debug adapter driver");
2778 MODULE_LICENSE("GPL");
2779 MODULE_VERSION(SCSI_DEBUG_VERSION);
2780
2781 MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
2782 MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
2783 MODULE_PARM_DESC(delay, "# of jiffies to delay response(def=1)");
2784 MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs(def=8)");
2785 MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
2786 MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
2787 MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
2788 MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
2789 MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
2790 MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
2791 MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
2792 MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
2793 MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
2794 MODULE_PARM_DESC(lbprz, "unmapped blocks return 0 on read (def=1)");
2795 MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
2796 MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
2797 MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to 255(def))");
2798 MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
2799 MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
2800 MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
2801 MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
2802 MODULE_PARM_DESC(opt_blks, "optimal transfer length in block (def=64)");
2803 MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
2804 MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
2805 MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
2806 MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
2807 MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])");
2808 MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
2809 MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
2810 MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
2811 MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
2812 MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
2813 MODULE_PARM_DESC(virtual_gb, "virtual gigabyte size (def=0 -> use dev_size_mb)");
2814 MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
2815 MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
2816
2817 static char sdebug_info[256];
2818
2819 static const char * scsi_debug_info(struct Scsi_Host * shp)
2820 {
2821 sprintf(sdebug_info, "scsi_debug, version %s [%s], "
2822 "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION,
2823 scsi_debug_version_date, scsi_debug_dev_size_mb,
2824 scsi_debug_opts);
2825 return sdebug_info;
2826 }
2827
2828 /* scsi_debug_proc_info
2829 * Used if the driver currently has no own support for /proc/scsi
2830 */
2831 static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer, int length)
2832 {
2833 char arr[16];
2834 int opts;
2835 int minLen = length > 15 ? 15 : length;
2836
2837 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
2838 return -EACCES;
2839 memcpy(arr, buffer, minLen);
2840 arr[minLen] = '\0';
2841 if (1 != sscanf(arr, "%d", &opts))
2842 return -EINVAL;
2843 scsi_debug_opts = opts;
2844 if (scsi_debug_every_nth != 0)
2845 scsi_debug_cmnd_count = 0;
2846 return length;
2847 }
2848
2849 static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
2850 {
2851 seq_printf(m, "scsi_debug adapter driver, version "
2852 "%s [%s]\n"
2853 "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, "
2854 "every_nth=%d(curr:%d)\n"
2855 "delay=%d, max_luns=%d, scsi_level=%d\n"
2856 "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n"
2857 "number of aborts=%d, device_reset=%d, bus_resets=%d, "
2858 "host_resets=%d\ndix_reads=%d dix_writes=%d dif_errors=%d\n",
2859 SCSI_DEBUG_VERSION, scsi_debug_version_date, scsi_debug_num_tgts,
2860 scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth,
2861 scsi_debug_cmnd_count, scsi_debug_delay,
2862 scsi_debug_max_luns, scsi_debug_scsi_level,
2863 scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads,
2864 sdebug_sectors_per, num_aborts, num_dev_resets, num_bus_resets,
2865 num_host_resets, dix_reads, dix_writes, dif_errors);
2866 return 0;
2867 }
2868
2869 static ssize_t sdebug_delay_show(struct device_driver * ddp, char * buf)
2870 {
2871 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay);
2872 }
2873
2874 static ssize_t sdebug_delay_store(struct device_driver * ddp,
2875 const char * buf, size_t count)
2876 {
2877 int delay;
2878 char work[20];
2879
2880 if (1 == sscanf(buf, "%10s", work)) {
2881 if ((1 == sscanf(work, "%d", &delay)) && (delay >= 0)) {
2882 scsi_debug_delay = delay;
2883 return count;
2884 }
2885 }
2886 return -EINVAL;
2887 }
2888 DRIVER_ATTR(delay, S_IRUGO | S_IWUSR, sdebug_delay_show,
2889 sdebug_delay_store);
2890
2891 static ssize_t sdebug_opts_show(struct device_driver * ddp, char * buf)
2892 {
2893 return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts);
2894 }
2895
2896 static ssize_t sdebug_opts_store(struct device_driver * ddp,
2897 const char * buf, size_t count)
2898 {
2899 int opts;
2900 char work[20];
2901
2902 if (1 == sscanf(buf, "%10s", work)) {
2903 if (0 == strnicmp(work,"0x", 2)) {
2904 if (1 == sscanf(&work[2], "%x", &opts))
2905 goto opts_done;
2906 } else {
2907 if (1 == sscanf(work, "%d", &opts))
2908 goto opts_done;
2909 }
2910 }
2911 return -EINVAL;
2912 opts_done:
2913 scsi_debug_opts = opts;
2914 scsi_debug_cmnd_count = 0;
2915 return count;
2916 }
2917 DRIVER_ATTR(opts, S_IRUGO | S_IWUSR, sdebug_opts_show,
2918 sdebug_opts_store);
2919
2920 static ssize_t sdebug_ptype_show(struct device_driver * ddp, char * buf)
2921 {
2922 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype);
2923 }
2924 static ssize_t sdebug_ptype_store(struct device_driver * ddp,
2925 const char * buf, size_t count)
2926 {
2927 int n;
2928
2929 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2930 scsi_debug_ptype = n;
2931 return count;
2932 }
2933 return -EINVAL;
2934 }
2935 DRIVER_ATTR(ptype, S_IRUGO | S_IWUSR, sdebug_ptype_show, sdebug_ptype_store);
2936
2937 static ssize_t sdebug_dsense_show(struct device_driver * ddp, char * buf)
2938 {
2939 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense);
2940 }
2941 static ssize_t sdebug_dsense_store(struct device_driver * ddp,
2942 const char * buf, size_t count)
2943 {
2944 int n;
2945
2946 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2947 scsi_debug_dsense = n;
2948 return count;
2949 }
2950 return -EINVAL;
2951 }
2952 DRIVER_ATTR(dsense, S_IRUGO | S_IWUSR, sdebug_dsense_show,
2953 sdebug_dsense_store);
2954
2955 static ssize_t sdebug_fake_rw_show(struct device_driver * ddp, char * buf)
2956 {
2957 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw);
2958 }
2959 static ssize_t sdebug_fake_rw_store(struct device_driver * ddp,
2960 const char * buf, size_t count)
2961 {
2962 int n;
2963
2964 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2965 scsi_debug_fake_rw = n;
2966 return count;
2967 }
2968 return -EINVAL;
2969 }
2970 DRIVER_ATTR(fake_rw, S_IRUGO | S_IWUSR, sdebug_fake_rw_show,
2971 sdebug_fake_rw_store);
2972
2973 static ssize_t sdebug_no_lun_0_show(struct device_driver * ddp, char * buf)
2974 {
2975 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0);
2976 }
2977 static ssize_t sdebug_no_lun_0_store(struct device_driver * ddp,
2978 const char * buf, size_t count)
2979 {
2980 int n;
2981
2982 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2983 scsi_debug_no_lun_0 = n;
2984 return count;
2985 }
2986 return -EINVAL;
2987 }
2988 DRIVER_ATTR(no_lun_0, S_IRUGO | S_IWUSR, sdebug_no_lun_0_show,
2989 sdebug_no_lun_0_store);
2990
2991 static ssize_t sdebug_num_tgts_show(struct device_driver * ddp, char * buf)
2992 {
2993 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts);
2994 }
2995 static ssize_t sdebug_num_tgts_store(struct device_driver * ddp,
2996 const char * buf, size_t count)
2997 {
2998 int n;
2999
3000 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3001 scsi_debug_num_tgts = n;
3002 sdebug_max_tgts_luns();
3003 return count;
3004 }
3005 return -EINVAL;
3006 }
3007 DRIVER_ATTR(num_tgts, S_IRUGO | S_IWUSR, sdebug_num_tgts_show,
3008 sdebug_num_tgts_store);
3009
3010 static ssize_t sdebug_dev_size_mb_show(struct device_driver * ddp, char * buf)
3011 {
3012 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb);
3013 }
3014 DRIVER_ATTR(dev_size_mb, S_IRUGO, sdebug_dev_size_mb_show, NULL);
3015
3016 static ssize_t sdebug_num_parts_show(struct device_driver * ddp, char * buf)
3017 {
3018 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts);
3019 }
3020 DRIVER_ATTR(num_parts, S_IRUGO, sdebug_num_parts_show, NULL);
3021
3022 static ssize_t sdebug_every_nth_show(struct device_driver * ddp, char * buf)
3023 {
3024 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth);
3025 }
3026 static ssize_t sdebug_every_nth_store(struct device_driver * ddp,
3027 const char * buf, size_t count)
3028 {
3029 int nth;
3030
3031 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
3032 scsi_debug_every_nth = nth;
3033 scsi_debug_cmnd_count = 0;
3034 return count;
3035 }
3036 return -EINVAL;
3037 }
3038 DRIVER_ATTR(every_nth, S_IRUGO | S_IWUSR, sdebug_every_nth_show,
3039 sdebug_every_nth_store);
3040
3041 static ssize_t sdebug_max_luns_show(struct device_driver * ddp, char * buf)
3042 {
3043 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns);
3044 }
3045 static ssize_t sdebug_max_luns_store(struct device_driver * ddp,
3046 const char * buf, size_t count)
3047 {
3048 int n;
3049
3050 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3051 scsi_debug_max_luns = n;
3052 sdebug_max_tgts_luns();
3053 return count;
3054 }
3055 return -EINVAL;
3056 }
3057 DRIVER_ATTR(max_luns, S_IRUGO | S_IWUSR, sdebug_max_luns_show,
3058 sdebug_max_luns_store);
3059
3060 static ssize_t sdebug_max_queue_show(struct device_driver * ddp, char * buf)
3061 {
3062 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_queue);
3063 }
3064 static ssize_t sdebug_max_queue_store(struct device_driver * ddp,
3065 const char * buf, size_t count)
3066 {
3067 int n;
3068
3069 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
3070 (n <= SCSI_DEBUG_CANQUEUE)) {
3071 scsi_debug_max_queue = n;
3072 return count;
3073 }
3074 return -EINVAL;
3075 }
3076 DRIVER_ATTR(max_queue, S_IRUGO | S_IWUSR, sdebug_max_queue_show,
3077 sdebug_max_queue_store);
3078
3079 static ssize_t sdebug_no_uld_show(struct device_driver * ddp, char * buf)
3080 {
3081 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_uld);
3082 }
3083 DRIVER_ATTR(no_uld, S_IRUGO, sdebug_no_uld_show, NULL);
3084
3085 static ssize_t sdebug_scsi_level_show(struct device_driver * ddp, char * buf)
3086 {
3087 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level);
3088 }
3089 DRIVER_ATTR(scsi_level, S_IRUGO, sdebug_scsi_level_show, NULL);
3090
3091 static ssize_t sdebug_virtual_gb_show(struct device_driver * ddp, char * buf)
3092 {
3093 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb);
3094 }
3095 static ssize_t sdebug_virtual_gb_store(struct device_driver * ddp,
3096 const char * buf, size_t count)
3097 {
3098 int n;
3099
3100 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3101 scsi_debug_virtual_gb = n;
3102
3103 sdebug_capacity = get_sdebug_capacity();
3104
3105 return count;
3106 }
3107 return -EINVAL;
3108 }
3109 DRIVER_ATTR(virtual_gb, S_IRUGO | S_IWUSR, sdebug_virtual_gb_show,
3110 sdebug_virtual_gb_store);
3111
3112 static ssize_t sdebug_add_host_show(struct device_driver * ddp, char * buf)
3113 {
3114 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host);
3115 }
3116
3117 static ssize_t sdebug_add_host_store(struct device_driver * ddp,
3118 const char * buf, size_t count)
3119 {
3120 int delta_hosts;
3121
3122 if (sscanf(buf, "%d", &delta_hosts) != 1)
3123 return -EINVAL;
3124 if (delta_hosts > 0) {
3125 do {
3126 sdebug_add_adapter();
3127 } while (--delta_hosts);
3128 } else if (delta_hosts < 0) {
3129 do {
3130 sdebug_remove_adapter();
3131 } while (++delta_hosts);
3132 }
3133 return count;
3134 }
3135 DRIVER_ATTR(add_host, S_IRUGO | S_IWUSR, sdebug_add_host_show,
3136 sdebug_add_host_store);
3137
3138 static ssize_t sdebug_vpd_use_hostno_show(struct device_driver * ddp,
3139 char * buf)
3140 {
3141 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_vpd_use_hostno);
3142 }
3143 static ssize_t sdebug_vpd_use_hostno_store(struct device_driver * ddp,
3144 const char * buf, size_t count)
3145 {
3146 int n;
3147
3148 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3149 scsi_debug_vpd_use_hostno = n;
3150 return count;
3151 }
3152 return -EINVAL;
3153 }
3154 DRIVER_ATTR(vpd_use_hostno, S_IRUGO | S_IWUSR, sdebug_vpd_use_hostno_show,
3155 sdebug_vpd_use_hostno_store);
3156
3157 static ssize_t sdebug_sector_size_show(struct device_driver * ddp, char * buf)
3158 {
3159 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size);
3160 }
3161 DRIVER_ATTR(sector_size, S_IRUGO, sdebug_sector_size_show, NULL);
3162
3163 static ssize_t sdebug_dix_show(struct device_driver *ddp, char *buf)
3164 {
3165 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix);
3166 }
3167 DRIVER_ATTR(dix, S_IRUGO, sdebug_dix_show, NULL);
3168
3169 static ssize_t sdebug_dif_show(struct device_driver *ddp, char *buf)
3170 {
3171 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif);
3172 }
3173 DRIVER_ATTR(dif, S_IRUGO, sdebug_dif_show, NULL);
3174
3175 static ssize_t sdebug_guard_show(struct device_driver *ddp, char *buf)
3176 {
3177 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_guard);
3178 }
3179 DRIVER_ATTR(guard, S_IRUGO, sdebug_guard_show, NULL);
3180
3181 static ssize_t sdebug_ato_show(struct device_driver *ddp, char *buf)
3182 {
3183 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato);
3184 }
3185 DRIVER_ATTR(ato, S_IRUGO, sdebug_ato_show, NULL);
3186
3187 static ssize_t sdebug_map_show(struct device_driver *ddp, char *buf)
3188 {
3189 ssize_t count;
3190
3191 if (!scsi_debug_lbp())
3192 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
3193 sdebug_store_sectors);
3194
3195 count = bitmap_scnlistprintf(buf, PAGE_SIZE, map_storep, map_size);
3196
3197 buf[count++] = '\n';
3198 buf[count++] = 0;
3199
3200 return count;
3201 }
3202 DRIVER_ATTR(map, S_IRUGO, sdebug_map_show, NULL);
3203
3204 static ssize_t sdebug_removable_show(struct device_driver *ddp,
3205 char *buf)
3206 {
3207 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_removable ? 1 : 0);
3208 }
3209 static ssize_t sdebug_removable_store(struct device_driver *ddp,
3210 const char *buf, size_t count)
3211 {
3212 int n;
3213
3214 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
3215 scsi_debug_removable = (n > 0);
3216 return count;
3217 }
3218 return -EINVAL;
3219 }
3220 DRIVER_ATTR(removable, S_IRUGO | S_IWUSR, sdebug_removable_show,
3221 sdebug_removable_store);
3222
3223
3224 /* Note: The following function creates attribute files in the
3225 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
3226 files (over those found in the /sys/module/scsi_debug/parameters
3227 directory) is that auxiliary actions can be triggered when an attribute
3228 is changed. For example see: sdebug_add_host_store() above.
3229 */
3230 static int do_create_driverfs_files(void)
3231 {
3232 int ret;
3233
3234 ret = driver_create_file(&sdebug_driverfs_driver, &driver_attr_add_host);
3235 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_delay);
3236 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb);
3237 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dsense);
3238 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_every_nth);
3239 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_fake_rw);
3240 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_luns);
3241 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_queue);
3242 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_no_lun_0);
3243 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_no_uld);
3244 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_parts);
3245 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_tgts);
3246 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ptype);
3247 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_opts);
3248 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_removable);
3249 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_scsi_level);
3250 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb);
3251 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno);
3252 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_sector_size);
3253 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dix);
3254 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dif);
3255 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_guard);
3256 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ato);
3257 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_map);
3258 return ret;
3259 }
3260
3261 static void do_remove_driverfs_files(void)
3262 {
3263 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_map);
3264 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ato);
3265 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_guard);
3266 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dif);
3267 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dix);
3268 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_sector_size);
3269 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno);
3270 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb);
3271 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_scsi_level);
3272 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_opts);
3273 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ptype);
3274 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_removable);
3275 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_tgts);
3276 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_parts);
3277 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_no_uld);
3278 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_no_lun_0);
3279 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_queue);
3280 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_luns);
3281 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_fake_rw);
3282 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_every_nth);
3283 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dsense);
3284 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb);
3285 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_delay);
3286 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_add_host);
3287 }
3288
3289 struct device *pseudo_primary;
3290
3291 static int __init scsi_debug_init(void)
3292 {
3293 unsigned long sz;
3294 int host_to_add;
3295 int k;
3296 int ret;
3297
3298 switch (scsi_debug_sector_size) {
3299 case 512:
3300 case 1024:
3301 case 2048:
3302 case 4096:
3303 break;
3304 default:
3305 printk(KERN_ERR "scsi_debug_init: invalid sector_size %d\n",
3306 scsi_debug_sector_size);
3307 return -EINVAL;
3308 }
3309
3310 switch (scsi_debug_dif) {
3311
3312 case SD_DIF_TYPE0_PROTECTION:
3313 case SD_DIF_TYPE1_PROTECTION:
3314 case SD_DIF_TYPE2_PROTECTION:
3315 case SD_DIF_TYPE3_PROTECTION:
3316 break;
3317
3318 default:
3319 printk(KERN_ERR "scsi_debug_init: dif must be 0, 1, 2 or 3\n");
3320 return -EINVAL;
3321 }
3322
3323 if (scsi_debug_guard > 1) {
3324 printk(KERN_ERR "scsi_debug_init: guard must be 0 or 1\n");
3325 return -EINVAL;
3326 }
3327
3328 if (scsi_debug_ato > 1) {
3329 printk(KERN_ERR "scsi_debug_init: ato must be 0 or 1\n");
3330 return -EINVAL;
3331 }
3332
3333 if (scsi_debug_physblk_exp > 15) {
3334 printk(KERN_ERR "scsi_debug_init: invalid physblk_exp %u\n",
3335 scsi_debug_physblk_exp);
3336 return -EINVAL;
3337 }
3338
3339 if (scsi_debug_lowest_aligned > 0x3fff) {
3340 printk(KERN_ERR "scsi_debug_init: lowest_aligned too big: %u\n",
3341 scsi_debug_lowest_aligned);
3342 return -EINVAL;
3343 }
3344
3345 if (scsi_debug_dev_size_mb < 1)
3346 scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
3347 sz = (unsigned long)scsi_debug_dev_size_mb * 1048576;
3348 sdebug_store_sectors = sz / scsi_debug_sector_size;
3349 sdebug_capacity = get_sdebug_capacity();
3350
3351 /* play around with geometry, don't waste too much on track 0 */
3352 sdebug_heads = 8;
3353 sdebug_sectors_per = 32;
3354 if (scsi_debug_dev_size_mb >= 16)
3355 sdebug_heads = 32;
3356 else if (scsi_debug_dev_size_mb >= 256)
3357 sdebug_heads = 64;
3358 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
3359 (sdebug_sectors_per * sdebug_heads);
3360 if (sdebug_cylinders_per >= 1024) {
3361 /* other LLDs do this; implies >= 1GB ram disk ... */
3362 sdebug_heads = 255;
3363 sdebug_sectors_per = 63;
3364 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
3365 (sdebug_sectors_per * sdebug_heads);
3366 }
3367
3368 fake_storep = vmalloc(sz);
3369 if (NULL == fake_storep) {
3370 printk(KERN_ERR "scsi_debug_init: out of memory, 1\n");
3371 return -ENOMEM;
3372 }
3373 memset(fake_storep, 0, sz);
3374 if (scsi_debug_num_parts > 0)
3375 sdebug_build_parts(fake_storep, sz);
3376
3377 if (scsi_debug_dif) {
3378 int dif_size;
3379
3380 dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple);
3381 dif_storep = vmalloc(dif_size);
3382
3383 printk(KERN_ERR "scsi_debug_init: dif_storep %u bytes @ %p\n",
3384 dif_size, dif_storep);
3385
3386 if (dif_storep == NULL) {
3387 printk(KERN_ERR "scsi_debug_init: out of mem. (DIX)\n");
3388 ret = -ENOMEM;
3389 goto free_vm;
3390 }
3391
3392 memset(dif_storep, 0xff, dif_size);
3393 }
3394
3395 /* Logical Block Provisioning */
3396 if (scsi_debug_lbp()) {
3397 scsi_debug_unmap_max_blocks =
3398 clamp(scsi_debug_unmap_max_blocks, 0U, 0xffffffffU);
3399
3400 scsi_debug_unmap_max_desc =
3401 clamp(scsi_debug_unmap_max_desc, 0U, 256U);
3402
3403 scsi_debug_unmap_granularity =
3404 clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU);
3405
3406 if (scsi_debug_unmap_alignment &&
3407 scsi_debug_unmap_granularity <=
3408 scsi_debug_unmap_alignment) {
3409 printk(KERN_ERR
3410 "%s: ERR: unmap_granularity <= unmap_alignment\n",
3411 __func__);
3412 return -EINVAL;
3413 }
3414
3415 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
3416 map_storep = vmalloc(BITS_TO_LONGS(map_size) * sizeof(long));
3417
3418 printk(KERN_INFO "scsi_debug_init: %lu provisioning blocks\n",
3419 map_size);
3420
3421 if (map_storep == NULL) {
3422 printk(KERN_ERR "scsi_debug_init: out of mem. (MAP)\n");
3423 ret = -ENOMEM;
3424 goto free_vm;
3425 }
3426
3427 bitmap_zero(map_storep, map_size);
3428
3429 /* Map first 1KB for partition table */
3430 if (scsi_debug_num_parts)
3431 map_region(0, 2);
3432 }
3433
3434 pseudo_primary = root_device_register("pseudo_0");
3435 if (IS_ERR(pseudo_primary)) {
3436 printk(KERN_WARNING "scsi_debug: root_device_register() error\n");
3437 ret = PTR_ERR(pseudo_primary);
3438 goto free_vm;
3439 }
3440 ret = bus_register(&pseudo_lld_bus);
3441 if (ret < 0) {
3442 printk(KERN_WARNING "scsi_debug: bus_register error: %d\n",
3443 ret);
3444 goto dev_unreg;
3445 }
3446 ret = driver_register(&sdebug_driverfs_driver);
3447 if (ret < 0) {
3448 printk(KERN_WARNING "scsi_debug: driver_register error: %d\n",
3449 ret);
3450 goto bus_unreg;
3451 }
3452 ret = do_create_driverfs_files();
3453 if (ret < 0) {
3454 printk(KERN_WARNING "scsi_debug: driver_create_file error: %d\n",
3455 ret);
3456 goto del_files;
3457 }
3458
3459 init_all_queued();
3460
3461 host_to_add = scsi_debug_add_host;
3462 scsi_debug_add_host = 0;
3463
3464 for (k = 0; k < host_to_add; k++) {
3465 if (sdebug_add_adapter()) {
3466 printk(KERN_ERR "scsi_debug_init: "
3467 "sdebug_add_adapter failed k=%d\n", k);
3468 break;
3469 }
3470 }
3471
3472 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
3473 printk(KERN_INFO "scsi_debug_init: built %d host(s)\n",
3474 scsi_debug_add_host);
3475 }
3476 return 0;
3477
3478 del_files:
3479 do_remove_driverfs_files();
3480 driver_unregister(&sdebug_driverfs_driver);
3481 bus_unreg:
3482 bus_unregister(&pseudo_lld_bus);
3483 dev_unreg:
3484 root_device_unregister(pseudo_primary);
3485 free_vm:
3486 if (map_storep)
3487 vfree(map_storep);
3488 if (dif_storep)
3489 vfree(dif_storep);
3490 vfree(fake_storep);
3491
3492 return ret;
3493 }
3494
3495 static void __exit scsi_debug_exit(void)
3496 {
3497 int k = scsi_debug_add_host;
3498
3499 stop_all_queued();
3500 for (; k; k--)
3501 sdebug_remove_adapter();
3502 do_remove_driverfs_files();
3503 driver_unregister(&sdebug_driverfs_driver);
3504 bus_unregister(&pseudo_lld_bus);
3505 root_device_unregister(pseudo_primary);
3506
3507 if (dif_storep)
3508 vfree(dif_storep);
3509
3510 vfree(fake_storep);
3511 }
3512
3513 device_initcall(scsi_debug_init);
3514 module_exit(scsi_debug_exit);
3515
3516 static void sdebug_release_adapter(struct device * dev)
3517 {
3518 struct sdebug_host_info *sdbg_host;
3519
3520 sdbg_host = to_sdebug_host(dev);
3521 kfree(sdbg_host);
3522 }
3523
3524 static int sdebug_add_adapter(void)
3525 {
3526 int k, devs_per_host;
3527 int error = 0;
3528 struct sdebug_host_info *sdbg_host;
3529 struct sdebug_dev_info *sdbg_devinfo, *tmp;
3530
3531 sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL);
3532 if (NULL == sdbg_host) {
3533 printk(KERN_ERR "%s: out of memory at line %d\n",
3534 __func__, __LINE__);
3535 return -ENOMEM;
3536 }
3537
3538 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
3539
3540 devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns;
3541 for (k = 0; k < devs_per_host; k++) {
3542 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
3543 if (!sdbg_devinfo) {
3544 printk(KERN_ERR "%s: out of memory at line %d\n",
3545 __func__, __LINE__);
3546 error = -ENOMEM;
3547 goto clean;
3548 }
3549 }
3550
3551 spin_lock(&sdebug_host_list_lock);
3552 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
3553 spin_unlock(&sdebug_host_list_lock);
3554
3555 sdbg_host->dev.bus = &pseudo_lld_bus;
3556 sdbg_host->dev.parent = pseudo_primary;
3557 sdbg_host->dev.release = &sdebug_release_adapter;
3558 dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host);
3559
3560 error = device_register(&sdbg_host->dev);
3561
3562 if (error)
3563 goto clean;
3564
3565 ++scsi_debug_add_host;
3566 return error;
3567
3568 clean:
3569 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
3570 dev_list) {
3571 list_del(&sdbg_devinfo->dev_list);
3572 kfree(sdbg_devinfo);
3573 }
3574
3575 kfree(sdbg_host);
3576 return error;
3577 }
3578
3579 static void sdebug_remove_adapter(void)
3580 {
3581 struct sdebug_host_info * sdbg_host = NULL;
3582
3583 spin_lock(&sdebug_host_list_lock);
3584 if (!list_empty(&sdebug_host_list)) {
3585 sdbg_host = list_entry(sdebug_host_list.prev,
3586 struct sdebug_host_info, host_list);
3587 list_del(&sdbg_host->host_list);
3588 }
3589 spin_unlock(&sdebug_host_list_lock);
3590
3591 if (!sdbg_host)
3592 return;
3593
3594 device_unregister(&sdbg_host->dev);
3595 --scsi_debug_add_host;
3596 }
3597
3598 static
3599 int scsi_debug_queuecommand_lck(struct scsi_cmnd *SCpnt, done_funct_t done)
3600 {
3601 unsigned char *cmd = (unsigned char *) SCpnt->cmnd;
3602 int len, k;
3603 unsigned int num;
3604 unsigned long long lba;
3605 u32 ei_lba;
3606 int errsts = 0;
3607 int target = SCpnt->device->id;
3608 struct sdebug_dev_info *devip = NULL;
3609 int inj_recovered = 0;
3610 int inj_transport = 0;
3611 int inj_dif = 0;
3612 int inj_dix = 0;
3613 int delay_override = 0;
3614 int unmap = 0;
3615
3616 scsi_set_resid(SCpnt, 0);
3617 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmd) {
3618 printk(KERN_INFO "scsi_debug: cmd ");
3619 for (k = 0, len = SCpnt->cmd_len; k < len; ++k)
3620 printk("%02x ", (int)cmd[k]);
3621 printk("\n");
3622 }
3623
3624 if (target == SCpnt->device->host->hostt->this_id) {
3625 printk(KERN_INFO "scsi_debug: initiator's id used as "
3626 "target!\n");
3627 return schedule_resp(SCpnt, NULL, done,
3628 DID_NO_CONNECT << 16, 0);
3629 }
3630
3631 if ((SCpnt->device->lun >= scsi_debug_max_luns) &&
3632 (SCpnt->device->lun != SAM2_WLUN_REPORT_LUNS))
3633 return schedule_resp(SCpnt, NULL, done,
3634 DID_NO_CONNECT << 16, 0);
3635 devip = devInfoReg(SCpnt->device);
3636 if (NULL == devip)
3637 return schedule_resp(SCpnt, NULL, done,
3638 DID_NO_CONNECT << 16, 0);
3639
3640 if ((scsi_debug_every_nth != 0) &&
3641 (++scsi_debug_cmnd_count >= abs(scsi_debug_every_nth))) {
3642 scsi_debug_cmnd_count = 0;
3643 if (scsi_debug_every_nth < -1)
3644 scsi_debug_every_nth = -1;
3645 if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts)
3646 return 0; /* ignore command causing timeout */
3647 else if (SCSI_DEBUG_OPT_MAC_TIMEOUT & scsi_debug_opts &&
3648 scsi_medium_access_command(SCpnt))
3649 return 0; /* time out reads and writes */
3650 else if (SCSI_DEBUG_OPT_RECOVERED_ERR & scsi_debug_opts)
3651 inj_recovered = 1; /* to reads and writes below */
3652 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & scsi_debug_opts)
3653 inj_transport = 1; /* to reads and writes below */
3654 else if (SCSI_DEBUG_OPT_DIF_ERR & scsi_debug_opts)
3655 inj_dif = 1; /* to reads and writes below */
3656 else if (SCSI_DEBUG_OPT_DIX_ERR & scsi_debug_opts)
3657 inj_dix = 1; /* to reads and writes below */
3658 }
3659
3660 if (devip->wlun) {
3661 switch (*cmd) {
3662 case INQUIRY:
3663 case REQUEST_SENSE:
3664 case TEST_UNIT_READY:
3665 case REPORT_LUNS:
3666 break; /* only allowable wlun commands */
3667 default:
3668 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3669 printk(KERN_INFO "scsi_debug: Opcode: 0x%x "
3670 "not supported for wlun\n", *cmd);
3671 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3672 INVALID_OPCODE, 0);
3673 errsts = check_condition_result;
3674 return schedule_resp(SCpnt, devip, done, errsts,
3675 0);
3676 }
3677 }
3678
3679 switch (*cmd) {
3680 case INQUIRY: /* mandatory, ignore unit attention */
3681 delay_override = 1;
3682 errsts = resp_inquiry(SCpnt, target, devip);
3683 break;
3684 case REQUEST_SENSE: /* mandatory, ignore unit attention */
3685 delay_override = 1;
3686 errsts = resp_requests(SCpnt, devip);
3687 break;
3688 case REZERO_UNIT: /* actually this is REWIND for SSC */
3689 case START_STOP:
3690 errsts = resp_start_stop(SCpnt, devip);
3691 break;
3692 case ALLOW_MEDIUM_REMOVAL:
3693 errsts = check_readiness(SCpnt, 1, devip);
3694 if (errsts)
3695 break;
3696 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3697 printk(KERN_INFO "scsi_debug: Medium removal %s\n",
3698 cmd[4] ? "inhibited" : "enabled");
3699 break;
3700 case SEND_DIAGNOSTIC: /* mandatory */
3701 errsts = check_readiness(SCpnt, 1, devip);
3702 break;
3703 case TEST_UNIT_READY: /* mandatory */
3704 delay_override = 1;
3705 errsts = check_readiness(SCpnt, 0, devip);
3706 break;
3707 case RESERVE:
3708 errsts = check_readiness(SCpnt, 1, devip);
3709 break;
3710 case RESERVE_10:
3711 errsts = check_readiness(SCpnt, 1, devip);
3712 break;
3713 case RELEASE:
3714 errsts = check_readiness(SCpnt, 1, devip);
3715 break;
3716 case RELEASE_10:
3717 errsts = check_readiness(SCpnt, 1, devip);
3718 break;
3719 case READ_CAPACITY:
3720 errsts = resp_readcap(SCpnt, devip);
3721 break;
3722 case SERVICE_ACTION_IN:
3723 if (cmd[1] == SAI_READ_CAPACITY_16)
3724 errsts = resp_readcap16(SCpnt, devip);
3725 else if (cmd[1] == SAI_GET_LBA_STATUS) {
3726
3727 if (scsi_debug_lbp() == 0) {
3728 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3729 INVALID_COMMAND_OPCODE, 0);
3730 errsts = check_condition_result;
3731 } else
3732 errsts = resp_get_lba_status(SCpnt, devip);
3733 } else {
3734 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3735 INVALID_OPCODE, 0);
3736 errsts = check_condition_result;
3737 }
3738 break;
3739 case MAINTENANCE_IN:
3740 if (MI_REPORT_TARGET_PGS != cmd[1]) {
3741 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3742 INVALID_OPCODE, 0);
3743 errsts = check_condition_result;
3744 break;
3745 }
3746 errsts = resp_report_tgtpgs(SCpnt, devip);
3747 break;
3748 case READ_16:
3749 case READ_12:
3750 case READ_10:
3751 /* READ{10,12,16} and DIF Type 2 are natural enemies */
3752 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
3753 cmd[1] & 0xe0) {
3754 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3755 INVALID_COMMAND_OPCODE, 0);
3756 errsts = check_condition_result;
3757 break;
3758 }
3759
3760 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
3761 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
3762 (cmd[1] & 0xe0) == 0)
3763 printk(KERN_ERR "Unprotected RD/WR to DIF device\n");
3764
3765 /* fall through */
3766 case READ_6:
3767 read:
3768 errsts = check_readiness(SCpnt, 0, devip);
3769 if (errsts)
3770 break;
3771 if (scsi_debug_fake_rw)
3772 break;
3773 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3774 errsts = resp_read(SCpnt, lba, num, devip, ei_lba);
3775 if (inj_recovered && (0 == errsts)) {
3776 mk_sense_buffer(devip, RECOVERED_ERROR,
3777 THRESHOLD_EXCEEDED, 0);
3778 errsts = check_condition_result;
3779 } else if (inj_transport && (0 == errsts)) {
3780 mk_sense_buffer(devip, ABORTED_COMMAND,
3781 TRANSPORT_PROBLEM, ACK_NAK_TO);
3782 errsts = check_condition_result;
3783 } else if (inj_dif && (0 == errsts)) {
3784 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1);
3785 errsts = illegal_condition_result;
3786 } else if (inj_dix && (0 == errsts)) {
3787 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1);
3788 errsts = illegal_condition_result;
3789 }
3790 break;
3791 case REPORT_LUNS: /* mandatory, ignore unit attention */
3792 delay_override = 1;
3793 errsts = resp_report_luns(SCpnt, devip);
3794 break;
3795 case VERIFY: /* 10 byte SBC-2 command */
3796 errsts = check_readiness(SCpnt, 0, devip);
3797 break;
3798 case WRITE_16:
3799 case WRITE_12:
3800 case WRITE_10:
3801 /* WRITE{10,12,16} and DIF Type 2 are natural enemies */
3802 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
3803 cmd[1] & 0xe0) {
3804 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3805 INVALID_COMMAND_OPCODE, 0);
3806 errsts = check_condition_result;
3807 break;
3808 }
3809
3810 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
3811 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
3812 (cmd[1] & 0xe0) == 0)
3813 printk(KERN_ERR "Unprotected RD/WR to DIF device\n");
3814
3815 /* fall through */
3816 case WRITE_6:
3817 write:
3818 errsts = check_readiness(SCpnt, 0, devip);
3819 if (errsts)
3820 break;
3821 if (scsi_debug_fake_rw)
3822 break;
3823 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3824 errsts = resp_write(SCpnt, lba, num, devip, ei_lba);
3825 if (inj_recovered && (0 == errsts)) {
3826 mk_sense_buffer(devip, RECOVERED_ERROR,
3827 THRESHOLD_EXCEEDED, 0);
3828 errsts = check_condition_result;
3829 } else if (inj_dif && (0 == errsts)) {
3830 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1);
3831 errsts = illegal_condition_result;
3832 } else if (inj_dix && (0 == errsts)) {
3833 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1);
3834 errsts = illegal_condition_result;
3835 }
3836 break;
3837 case WRITE_SAME_16:
3838 case WRITE_SAME:
3839 if (cmd[1] & 0x8) {
3840 if ((*cmd == WRITE_SAME_16 && scsi_debug_lbpws == 0) ||
3841 (*cmd == WRITE_SAME && scsi_debug_lbpws10 == 0)) {
3842 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3843 INVALID_FIELD_IN_CDB, 0);
3844 errsts = check_condition_result;
3845 } else
3846 unmap = 1;
3847 }
3848 if (errsts)
3849 break;
3850 errsts = check_readiness(SCpnt, 0, devip);
3851 if (errsts)
3852 break;
3853 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3854 errsts = resp_write_same(SCpnt, lba, num, devip, ei_lba, unmap);
3855 break;
3856 case UNMAP:
3857 errsts = check_readiness(SCpnt, 0, devip);
3858 if (errsts)
3859 break;
3860
3861 if (scsi_debug_unmap_max_desc == 0 || scsi_debug_lbpu == 0) {
3862 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3863 INVALID_COMMAND_OPCODE, 0);
3864 errsts = check_condition_result;
3865 } else
3866 errsts = resp_unmap(SCpnt, devip);
3867 break;
3868 case MODE_SENSE:
3869 case MODE_SENSE_10:
3870 errsts = resp_mode_sense(SCpnt, target, devip);
3871 break;
3872 case MODE_SELECT:
3873 errsts = resp_mode_select(SCpnt, 1, devip);
3874 break;
3875 case MODE_SELECT_10:
3876 errsts = resp_mode_select(SCpnt, 0, devip);
3877 break;
3878 case LOG_SENSE:
3879 errsts = resp_log_sense(SCpnt, devip);
3880 break;
3881 case SYNCHRONIZE_CACHE:
3882 delay_override = 1;
3883 errsts = check_readiness(SCpnt, 0, devip);
3884 break;
3885 case WRITE_BUFFER:
3886 errsts = check_readiness(SCpnt, 1, devip);
3887 break;
3888 case XDWRITEREAD_10:
3889 if (!scsi_bidi_cmnd(SCpnt)) {
3890 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3891 INVALID_FIELD_IN_CDB, 0);
3892 errsts = check_condition_result;
3893 break;
3894 }
3895
3896 errsts = check_readiness(SCpnt, 0, devip);
3897 if (errsts)
3898 break;
3899 if (scsi_debug_fake_rw)
3900 break;
3901 get_data_transfer_info(cmd, &lba, &num, &ei_lba);
3902 errsts = resp_read(SCpnt, lba, num, devip, ei_lba);
3903 if (errsts)
3904 break;
3905 errsts = resp_write(SCpnt, lba, num, devip, ei_lba);
3906 if (errsts)
3907 break;
3908 errsts = resp_xdwriteread(SCpnt, lba, num, devip);
3909 break;
3910 case VARIABLE_LENGTH_CMD:
3911 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION) {
3912
3913 if ((cmd[10] & 0xe0) == 0)
3914 printk(KERN_ERR
3915 "Unprotected RD/WR to DIF device\n");
3916
3917 if (cmd[9] == READ_32) {
3918 BUG_ON(SCpnt->cmd_len < 32);
3919 goto read;
3920 }
3921
3922 if (cmd[9] == WRITE_32) {
3923 BUG_ON(SCpnt->cmd_len < 32);
3924 goto write;
3925 }
3926 }
3927
3928 mk_sense_buffer(devip, ILLEGAL_REQUEST,
3929 INVALID_FIELD_IN_CDB, 0);
3930 errsts = check_condition_result;
3931 break;
3932
3933 default:
3934 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3935 printk(KERN_INFO "scsi_debug: Opcode: 0x%x not "
3936 "supported\n", *cmd);
3937 errsts = check_readiness(SCpnt, 1, devip);
3938 if (errsts)
3939 break; /* Unit attention takes precedence */
3940 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
3941 errsts = check_condition_result;
3942 break;
3943 }
3944 return schedule_resp(SCpnt, devip, done, errsts,
3945 (delay_override ? 0 : scsi_debug_delay));
3946 }
3947
3948 static DEF_SCSI_QCMD(scsi_debug_queuecommand)
3949
3950 static struct scsi_host_template sdebug_driver_template = {
3951 .show_info = scsi_debug_show_info,
3952 .write_info = scsi_debug_write_info,
3953 .proc_name = sdebug_proc_name,
3954 .name = "SCSI DEBUG",
3955 .info = scsi_debug_info,
3956 .slave_alloc = scsi_debug_slave_alloc,
3957 .slave_configure = scsi_debug_slave_configure,
3958 .slave_destroy = scsi_debug_slave_destroy,
3959 .ioctl = scsi_debug_ioctl,
3960 .queuecommand = scsi_debug_queuecommand,
3961 .eh_abort_handler = scsi_debug_abort,
3962 .eh_bus_reset_handler = scsi_debug_bus_reset,
3963 .eh_device_reset_handler = scsi_debug_device_reset,
3964 .eh_host_reset_handler = scsi_debug_host_reset,
3965 .bios_param = scsi_debug_biosparam,
3966 .can_queue = SCSI_DEBUG_CANQUEUE,
3967 .this_id = 7,
3968 .sg_tablesize = 256,
3969 .cmd_per_lun = 16,
3970 .max_sectors = 0xffff,
3971 .use_clustering = DISABLE_CLUSTERING,
3972 .module = THIS_MODULE,
3973 };
3974
3975 static int sdebug_driver_probe(struct device * dev)
3976 {
3977 int error = 0;
3978 struct sdebug_host_info *sdbg_host;
3979 struct Scsi_Host *hpnt;
3980 int host_prot;
3981
3982 sdbg_host = to_sdebug_host(dev);
3983
3984 sdebug_driver_template.can_queue = scsi_debug_max_queue;
3985 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
3986 if (NULL == hpnt) {
3987 printk(KERN_ERR "%s: scsi_register failed\n", __func__);
3988 error = -ENODEV;
3989 return error;
3990 }
3991
3992 sdbg_host->shost = hpnt;
3993 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
3994 if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id))
3995 hpnt->max_id = scsi_debug_num_tgts + 1;
3996 else
3997 hpnt->max_id = scsi_debug_num_tgts;
3998 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; /* = scsi_debug_max_luns; */
3999
4000 host_prot = 0;
4001
4002 switch (scsi_debug_dif) {
4003
4004 case SD_DIF_TYPE1_PROTECTION:
4005 host_prot = SHOST_DIF_TYPE1_PROTECTION;
4006 if (scsi_debug_dix)
4007 host_prot |= SHOST_DIX_TYPE1_PROTECTION;
4008 break;
4009
4010 case SD_DIF_TYPE2_PROTECTION:
4011 host_prot = SHOST_DIF_TYPE2_PROTECTION;
4012 if (scsi_debug_dix)
4013 host_prot |= SHOST_DIX_TYPE2_PROTECTION;
4014 break;
4015
4016 case SD_DIF_TYPE3_PROTECTION:
4017 host_prot = SHOST_DIF_TYPE3_PROTECTION;
4018 if (scsi_debug_dix)
4019 host_prot |= SHOST_DIX_TYPE3_PROTECTION;
4020 break;
4021
4022 default:
4023 if (scsi_debug_dix)
4024 host_prot |= SHOST_DIX_TYPE0_PROTECTION;
4025 break;
4026 }
4027
4028 scsi_host_set_prot(hpnt, host_prot);
4029
4030 printk(KERN_INFO "scsi_debug: host protection%s%s%s%s%s%s%s\n",
4031 (host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
4032 (host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
4033 (host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
4034 (host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
4035 (host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
4036 (host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
4037 (host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
4038
4039 if (scsi_debug_guard == 1)
4040 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
4041 else
4042 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
4043
4044 error = scsi_add_host(hpnt, &sdbg_host->dev);
4045 if (error) {
4046 printk(KERN_ERR "%s: scsi_add_host failed\n", __func__);
4047 error = -ENODEV;
4048 scsi_host_put(hpnt);
4049 } else
4050 scsi_scan_host(hpnt);
4051
4052
4053 return error;
4054 }
4055
4056 static int sdebug_driver_remove(struct device * dev)
4057 {
4058 struct sdebug_host_info *sdbg_host;
4059 struct sdebug_dev_info *sdbg_devinfo, *tmp;
4060
4061 sdbg_host = to_sdebug_host(dev);
4062
4063 if (!sdbg_host) {
4064 printk(KERN_ERR "%s: Unable to locate host info\n",
4065 __func__);
4066 return -ENODEV;
4067 }
4068
4069 scsi_remove_host(sdbg_host->shost);
4070
4071 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
4072 dev_list) {
4073 list_del(&sdbg_devinfo->dev_list);
4074 kfree(sdbg_devinfo);
4075 }
4076
4077 scsi_host_put(sdbg_host->shost);
4078 return 0;
4079 }
4080
4081 static int pseudo_lld_bus_match(struct device *dev,
4082 struct device_driver *dev_driver)
4083 {
4084 return 1;
4085 }
4086
4087 static struct bus_type pseudo_lld_bus = {
4088 .name = "pseudo",
4089 .match = pseudo_lld_bus_match,
4090 .probe = sdebug_driver_probe,
4091 .remove = sdebug_driver_remove,
4092 };
kernel source for telekom puls (alcatel/mediatek)