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Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6
[linux-2.6/lfs.git] / drivers / scsi / scsi_debug.c
blobf6600bfb5bde71ffc244260ec6aa1aec4cf59469
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://www.torque.net/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/types.h>
34 #include <linux/string.h>
35 #include <linux/genhd.h>
36 #include <linux/fs.h>
37 #include <linux/init.h>
38 #include <linux/proc_fs.h>
39 #include <linux/vmalloc.h>
40 #include <linux/moduleparam.h>
41 #include <linux/scatterlist.h>
42 #include <linux/blkdev.h>
43
44 #include <scsi/scsi.h>
45 #include <scsi/scsi_cmnd.h>
46 #include <scsi/scsi_device.h>
47 #include <scsi/scsi_host.h>
48 #include <scsi/scsicam.h>
49 #include <scsi/scsi_eh.h>
50
51 #include <linux/stat.h>
52
53 #include "scsi_logging.h"
54
55 #define SCSI_DEBUG_VERSION "1.81"
56 static const char * scsi_debug_version_date = "20070104";
57
58 /* Additional Sense Code (ASC) */
59 #define NO_ADDITIONAL_SENSE 0x0
60 #define LOGICAL_UNIT_NOT_READY 0x4
61 #define UNRECOVERED_READ_ERR 0x11
62 #define PARAMETER_LIST_LENGTH_ERR 0x1a
63 #define INVALID_OPCODE 0x20
64 #define ADDR_OUT_OF_RANGE 0x21
65 #define INVALID_FIELD_IN_CDB 0x24
66 #define INVALID_FIELD_IN_PARAM_LIST 0x26
67 #define POWERON_RESET 0x29
68 #define SAVING_PARAMS_UNSUP 0x39
69 #define TRANSPORT_PROBLEM 0x4b
70 #define THRESHOLD_EXCEEDED 0x5d
71 #define LOW_POWER_COND_ON 0x5e
72
73 /* Additional Sense Code Qualifier (ASCQ) */
74 #define ACK_NAK_TO 0x3
75
76 #define SDEBUG_TAGGED_QUEUING 0 /* 0 | MSG_SIMPLE_TAG | MSG_ORDERED_TAG */
77
78 /* Default values for driver parameters */
79 #define DEF_NUM_HOST 1
80 #define DEF_NUM_TGTS 1
81 #define DEF_MAX_LUNS 1
82 /* With these defaults, this driver will make 1 host with 1 target
83 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
84 */
85 #define DEF_DELAY 1
86 #define DEF_DEV_SIZE_MB 8
87 #define DEF_EVERY_NTH 0
88 #define DEF_NUM_PARTS 0
89 #define DEF_OPTS 0
90 #define DEF_SCSI_LEVEL 5 /* INQUIRY, byte2 [5->SPC-3] */
91 #define DEF_PTYPE 0
92 #define DEF_D_SENSE 0
93 #define DEF_NO_LUN_0 0
94 #define DEF_VIRTUAL_GB 0
95 #define DEF_FAKE_RW 0
96 #define DEF_VPD_USE_HOSTNO 1
97
98 /* bit mask values for scsi_debug_opts */
99 #define SCSI_DEBUG_OPT_NOISE 1
100 #define SCSI_DEBUG_OPT_MEDIUM_ERR 2
101 #define SCSI_DEBUG_OPT_TIMEOUT 4
102 #define SCSI_DEBUG_OPT_RECOVERED_ERR 8
103 #define SCSI_DEBUG_OPT_TRANSPORT_ERR 16
104 /* When "every_nth" > 0 then modulo "every_nth" commands:
105 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
106 * - a RECOVERED_ERROR is simulated on successful read and write
107 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
108 * - a TRANSPORT_ERROR is simulated on successful read and write
109 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
110 *
111 * When "every_nth" < 0 then after "- every_nth" commands:
112 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
113 * - a RECOVERED_ERROR is simulated on successful read and write
114 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
115 * - a TRANSPORT_ERROR is simulated on successful read and write
116 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
117 * This will continue until some other action occurs (e.g. the user
118 * writing a new value (other than -1 or 1) to every_nth via sysfs).
119 */
120
121 /* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
122 * sector on read commands: */
123 #define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
124
125 /* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
126 * or "peripheral device" addressing (value 0) */
127 #define SAM2_LUN_ADDRESS_METHOD 0
128 #define SAM2_WLUN_REPORT_LUNS 0xc101
129
130 static int scsi_debug_add_host = DEF_NUM_HOST;
131 static int scsi_debug_delay = DEF_DELAY;
132 static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB;
133 static int scsi_debug_every_nth = DEF_EVERY_NTH;
134 static int scsi_debug_max_luns = DEF_MAX_LUNS;
135 static int scsi_debug_num_parts = DEF_NUM_PARTS;
136 static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */
137 static int scsi_debug_opts = DEF_OPTS;
138 static int scsi_debug_scsi_level = DEF_SCSI_LEVEL;
139 static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */
140 static int scsi_debug_dsense = DEF_D_SENSE;
141 static int scsi_debug_no_lun_0 = DEF_NO_LUN_0;
142 static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB;
143 static int scsi_debug_fake_rw = DEF_FAKE_RW;
144 static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
145
146 static int scsi_debug_cmnd_count = 0;
147
148 #define DEV_READONLY(TGT) (0)
149 #define DEV_REMOVEABLE(TGT) (0)
150
151 static unsigned int sdebug_store_sectors;
152 static sector_t sdebug_capacity; /* in sectors */
153
154 /* old BIOS stuff, kernel may get rid of them but some mode sense pages
155 may still need them */
156 static int sdebug_heads; /* heads per disk */
157 static int sdebug_cylinders_per; /* cylinders per surface */
158 static int sdebug_sectors_per; /* sectors per cylinder */
159
160 /* default sector size is 512 bytes, 2**9 bytes */
161 #define POW2_SECT_SIZE 9
162 #define SECT_SIZE (1 << POW2_SECT_SIZE)
163 #define SECT_SIZE_PER(TGT) SECT_SIZE
164
165 #define SDEBUG_MAX_PARTS 4
166
167 #define SDEBUG_SENSE_LEN 32
168
169 #define SCSI_DEBUG_CANQUEUE 255
170 #define SCSI_DEBUG_MAX_CMD_LEN 16
171
172 struct sdebug_dev_info {
173 struct list_head dev_list;
174 unsigned char sense_buff[SDEBUG_SENSE_LEN]; /* weak nexus */
175 unsigned int channel;
176 unsigned int target;
177 unsigned int lun;
178 struct sdebug_host_info *sdbg_host;
179 unsigned int wlun;
180 char reset;
181 char stopped;
182 char used;
183 };
184
185 struct sdebug_host_info {
186 struct list_head host_list;
187 struct Scsi_Host *shost;
188 struct device dev;
189 struct list_head dev_info_list;
190 };
191
192 #define to_sdebug_host(d) \
193 container_of(d, struct sdebug_host_info, dev)
194
195 static LIST_HEAD(sdebug_host_list);
196 static DEFINE_SPINLOCK(sdebug_host_list_lock);
197
198 typedef void (* done_funct_t) (struct scsi_cmnd *);
199
200 struct sdebug_queued_cmd {
201 int in_use;
202 struct timer_list cmnd_timer;
203 done_funct_t done_funct;
204 struct scsi_cmnd * a_cmnd;
205 int scsi_result;
206 };
207 static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
208
209 static unsigned char * fake_storep; /* ramdisk storage */
210
211 static int num_aborts = 0;
212 static int num_dev_resets = 0;
213 static int num_bus_resets = 0;
214 static int num_host_resets = 0;
215
216 static DEFINE_SPINLOCK(queued_arr_lock);
217 static DEFINE_RWLOCK(atomic_rw);
218
219 static char sdebug_proc_name[] = "scsi_debug";
220
221 static struct bus_type pseudo_lld_bus;
222
223 static struct device_driver sdebug_driverfs_driver = {
224 .name = sdebug_proc_name,
225 .bus = &pseudo_lld_bus,
226 };
227
228 static const int check_condition_result =
229 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
230
231 static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
232 0, 0, 0x2, 0x4b};
233 static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
234 0, 0, 0x0, 0x0};
235
236 static int sdebug_add_adapter(void);
237 static void sdebug_remove_adapter(void);
238
239 static void sdebug_max_tgts_luns(void)
240 {
241 struct sdebug_host_info *sdbg_host;
242 struct Scsi_Host *hpnt;
243
244 spin_lock(&sdebug_host_list_lock);
245 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
246 hpnt = sdbg_host->shost;
247 if ((hpnt->this_id >= 0) &&
248 (scsi_debug_num_tgts > hpnt->this_id))
249 hpnt->max_id = scsi_debug_num_tgts + 1;
250 else
251 hpnt->max_id = scsi_debug_num_tgts;
252 /* scsi_debug_max_luns; */
253 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS;
254 }
255 spin_unlock(&sdebug_host_list_lock);
256 }
257
258 static void mk_sense_buffer(struct sdebug_dev_info *devip, int key,
259 int asc, int asq)
260 {
261 unsigned char *sbuff;
262
263 sbuff = devip->sense_buff;
264 memset(sbuff, 0, SDEBUG_SENSE_LEN);
265
266 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, key, asc, asq);
267
268 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
269 printk(KERN_INFO "scsi_debug: [sense_key,asc,ascq]: "
270 "[0x%x,0x%x,0x%x]\n", key, asc, asq);
271 }
272
273 static void get_data_transfer_info(unsigned char *cmd,
274 unsigned long long *lba, unsigned int *num)
275 {
276 switch (*cmd) {
277 case WRITE_16:
278 case READ_16:
279 *lba = (u64)cmd[9] | (u64)cmd[8] << 8 |
280 (u64)cmd[7] << 16 | (u64)cmd[6] << 24 |
281 (u64)cmd[5] << 32 | (u64)cmd[4] << 40 |
282 (u64)cmd[3] << 48 | (u64)cmd[2] << 56;
283
284 *num = (u32)cmd[13] | (u32)cmd[12] << 8 | (u32)cmd[11] << 16 |
285 (u32)cmd[10] << 24;
286 break;
287 case WRITE_12:
288 case READ_12:
289 *lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 |
290 (u32)cmd[2] << 24;
291
292 *num = (u32)cmd[9] | (u32)cmd[8] << 8 | (u32)cmd[7] << 16 |
293 (u32)cmd[6] << 24;
294 break;
295 case WRITE_10:
296 case READ_10:
297 case XDWRITEREAD_10:
298 *lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 |
299 (u32)cmd[2] << 24;
300
301 *num = (u32)cmd[8] | (u32)cmd[7] << 8;
302 break;
303 case WRITE_6:
304 case READ_6:
305 *lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
306 (u32)(cmd[1] & 0x1f) << 16;
307 *num = (0 == cmd[4]) ? 256 : cmd[4];
308 break;
309 default:
310 break;
311 }
312 }
313
314 static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
315 {
316 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
317 printk(KERN_INFO "scsi_debug: ioctl: cmd=0x%x\n", cmd);
318 }
319 return -EINVAL;
320 /* return -ENOTTY; // correct return but upsets fdisk */
321 }
322
323 static int check_readiness(struct scsi_cmnd * SCpnt, int reset_only,
324 struct sdebug_dev_info * devip)
325 {
326 if (devip->reset) {
327 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
328 printk(KERN_INFO "scsi_debug: Reporting Unit "
329 "attention: power on reset\n");
330 devip->reset = 0;
331 mk_sense_buffer(devip, UNIT_ATTENTION, POWERON_RESET, 0);
332 return check_condition_result;
333 }
334 if ((0 == reset_only) && devip->stopped) {
335 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
336 printk(KERN_INFO "scsi_debug: Reporting Not "
337 "ready: initializing command required\n");
338 mk_sense_buffer(devip, NOT_READY, LOGICAL_UNIT_NOT_READY,
339 0x2);
340 return check_condition_result;
341 }
342 return 0;
343 }
344
345 /* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */
346 static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
347 int arr_len)
348 {
349 int act_len;
350 struct scsi_data_buffer *sdb = scsi_in(scp);
351
352 if (!sdb->length)
353 return 0;
354 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
355 return (DID_ERROR << 16);
356
357 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
358 arr, arr_len);
359 if (sdb->resid)
360 sdb->resid -= act_len;
361 else
362 sdb->resid = scsi_bufflen(scp) - act_len;
363
364 return 0;
365 }
366
367 /* Returns number of bytes fetched into 'arr' or -1 if error. */
368 static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
369 int arr_len)
370 {
371 if (!scsi_bufflen(scp))
372 return 0;
373 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE))
374 return -1;
375
376 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
377 }
378
379
380 static const char * inq_vendor_id = "Linux ";
381 static const char * inq_product_id = "scsi_debug ";
382 static const char * inq_product_rev = "0004";
383
384 static int inquiry_evpd_83(unsigned char * arr, int port_group_id,
385 int target_dev_id, int dev_id_num,
386 const char * dev_id_str,
387 int dev_id_str_len)
388 {
389 int num, port_a;
390 char b[32];
391
392 port_a = target_dev_id + 1;
393 /* T10 vendor identifier field format (faked) */
394 arr[0] = 0x2; /* ASCII */
395 arr[1] = 0x1;
396 arr[2] = 0x0;
397 memcpy(&arr[4], inq_vendor_id, 8);
398 memcpy(&arr[12], inq_product_id, 16);
399 memcpy(&arr[28], dev_id_str, dev_id_str_len);
400 num = 8 + 16 + dev_id_str_len;
401 arr[3] = num;
402 num += 4;
403 if (dev_id_num >= 0) {
404 /* NAA-5, Logical unit identifier (binary) */
405 arr[num++] = 0x1; /* binary (not necessarily sas) */
406 arr[num++] = 0x3; /* PIV=0, lu, naa */
407 arr[num++] = 0x0;
408 arr[num++] = 0x8;
409 arr[num++] = 0x53; /* naa-5 ieee company id=0x333333 (fake) */
410 arr[num++] = 0x33;
411 arr[num++] = 0x33;
412 arr[num++] = 0x30;
413 arr[num++] = (dev_id_num >> 24);
414 arr[num++] = (dev_id_num >> 16) & 0xff;
415 arr[num++] = (dev_id_num >> 8) & 0xff;
416 arr[num++] = dev_id_num & 0xff;
417 /* Target relative port number */
418 arr[num++] = 0x61; /* proto=sas, binary */
419 arr[num++] = 0x94; /* PIV=1, target port, rel port */
420 arr[num++] = 0x0; /* reserved */
421 arr[num++] = 0x4; /* length */
422 arr[num++] = 0x0; /* reserved */
423 arr[num++] = 0x0; /* reserved */
424 arr[num++] = 0x0;
425 arr[num++] = 0x1; /* relative port A */
426 }
427 /* NAA-5, Target port identifier */
428 arr[num++] = 0x61; /* proto=sas, binary */
429 arr[num++] = 0x93; /* piv=1, target port, naa */
430 arr[num++] = 0x0;
431 arr[num++] = 0x8;
432 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
433 arr[num++] = 0x22;
434 arr[num++] = 0x22;
435 arr[num++] = 0x20;
436 arr[num++] = (port_a >> 24);
437 arr[num++] = (port_a >> 16) & 0xff;
438 arr[num++] = (port_a >> 8) & 0xff;
439 arr[num++] = port_a & 0xff;
440 /* NAA-5, Target port group identifier */
441 arr[num++] = 0x61; /* proto=sas, binary */
442 arr[num++] = 0x95; /* piv=1, target port group id */
443 arr[num++] = 0x0;
444 arr[num++] = 0x4;
445 arr[num++] = 0;
446 arr[num++] = 0;
447 arr[num++] = (port_group_id >> 8) & 0xff;
448 arr[num++] = port_group_id & 0xff;
449 /* NAA-5, Target device identifier */
450 arr[num++] = 0x61; /* proto=sas, binary */
451 arr[num++] = 0xa3; /* piv=1, target device, naa */
452 arr[num++] = 0x0;
453 arr[num++] = 0x8;
454 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
455 arr[num++] = 0x22;
456 arr[num++] = 0x22;
457 arr[num++] = 0x20;
458 arr[num++] = (target_dev_id >> 24);
459 arr[num++] = (target_dev_id >> 16) & 0xff;
460 arr[num++] = (target_dev_id >> 8) & 0xff;
461 arr[num++] = target_dev_id & 0xff;
462 /* SCSI name string: Target device identifier */
463 arr[num++] = 0x63; /* proto=sas, UTF-8 */
464 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
465 arr[num++] = 0x0;
466 arr[num++] = 24;
467 memcpy(arr + num, "naa.52222220", 12);
468 num += 12;
469 snprintf(b, sizeof(b), "%08X", target_dev_id);
470 memcpy(arr + num, b, 8);
471 num += 8;
472 memset(arr + num, 0, 4);
473 num += 4;
474 return num;
475 }
476
477
478 static unsigned char vpd84_data[] = {
479 /* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
480 0x22,0x22,0x22,0x0,0xbb,0x1,
481 0x22,0x22,0x22,0x0,0xbb,0x2,
482 };
483
484 static int inquiry_evpd_84(unsigned char * arr)
485 {
486 memcpy(arr, vpd84_data, sizeof(vpd84_data));
487 return sizeof(vpd84_data);
488 }
489
490 static int inquiry_evpd_85(unsigned char * arr)
491 {
492 int num = 0;
493 const char * na1 = "https://www.kernel.org/config";
494 const char * na2 = "http://www.kernel.org/log";
495 int plen, olen;
496
497 arr[num++] = 0x1; /* lu, storage config */
498 arr[num++] = 0x0; /* reserved */
499 arr[num++] = 0x0;
500 olen = strlen(na1);
501 plen = olen + 1;
502 if (plen % 4)
503 plen = ((plen / 4) + 1) * 4;
504 arr[num++] = plen; /* length, null termianted, padded */
505 memcpy(arr + num, na1, olen);
506 memset(arr + num + olen, 0, plen - olen);
507 num += plen;
508
509 arr[num++] = 0x4; /* lu, logging */
510 arr[num++] = 0x0; /* reserved */
511 arr[num++] = 0x0;
512 olen = strlen(na2);
513 plen = olen + 1;
514 if (plen % 4)
515 plen = ((plen / 4) + 1) * 4;
516 arr[num++] = plen; /* length, null terminated, padded */
517 memcpy(arr + num, na2, olen);
518 memset(arr + num + olen, 0, plen - olen);
519 num += plen;
520
521 return num;
522 }
523
524 /* SCSI ports VPD page */
525 static int inquiry_evpd_88(unsigned char * arr, int target_dev_id)
526 {
527 int num = 0;
528 int port_a, port_b;
529
530 port_a = target_dev_id + 1;
531 port_b = port_a + 1;
532 arr[num++] = 0x0; /* reserved */
533 arr[num++] = 0x0; /* reserved */
534 arr[num++] = 0x0;
535 arr[num++] = 0x1; /* relative port 1 (primary) */
536 memset(arr + num, 0, 6);
537 num += 6;
538 arr[num++] = 0x0;
539 arr[num++] = 12; /* length tp descriptor */
540 /* naa-5 target port identifier (A) */
541 arr[num++] = 0x61; /* proto=sas, binary */
542 arr[num++] = 0x93; /* PIV=1, target port, NAA */
543 arr[num++] = 0x0; /* reserved */
544 arr[num++] = 0x8; /* length */
545 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
546 arr[num++] = 0x22;
547 arr[num++] = 0x22;
548 arr[num++] = 0x20;
549 arr[num++] = (port_a >> 24);
550 arr[num++] = (port_a >> 16) & 0xff;
551 arr[num++] = (port_a >> 8) & 0xff;
552 arr[num++] = port_a & 0xff;
553
554 arr[num++] = 0x0; /* reserved */
555 arr[num++] = 0x0; /* reserved */
556 arr[num++] = 0x0;
557 arr[num++] = 0x2; /* relative port 2 (secondary) */
558 memset(arr + num, 0, 6);
559 num += 6;
560 arr[num++] = 0x0;
561 arr[num++] = 12; /* length tp descriptor */
562 /* naa-5 target port identifier (B) */
563 arr[num++] = 0x61; /* proto=sas, binary */
564 arr[num++] = 0x93; /* PIV=1, target port, NAA */
565 arr[num++] = 0x0; /* reserved */
566 arr[num++] = 0x8; /* length */
567 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
568 arr[num++] = 0x22;
569 arr[num++] = 0x22;
570 arr[num++] = 0x20;
571 arr[num++] = (port_b >> 24);
572 arr[num++] = (port_b >> 16) & 0xff;
573 arr[num++] = (port_b >> 8) & 0xff;
574 arr[num++] = port_b & 0xff;
575
576 return num;
577 }
578
579
580 static unsigned char vpd89_data[] = {
581 /* from 4th byte */ 0,0,0,0,
582 'l','i','n','u','x',' ',' ',' ',
583 'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
584 '1','2','3','4',
585 0x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
586 0xec,0,0,0,
587 0x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
588 0,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
589 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
590 0x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
591 0x53,0x41,
592 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
593 0x20,0x20,
594 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
595 0x10,0x80,
596 0,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
597 0x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
598 0x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
599 0,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
600 0x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
601 0x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
602 0,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
603 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
604 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
605 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
606 0x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
607 0,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
608 0xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
609 0,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
610 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
611 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
612 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
613 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
614 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
615 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
616 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
617 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
618 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
619 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
620 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
621 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
622 };
623
624 static int inquiry_evpd_89(unsigned char * arr)
625 {
626 memcpy(arr, vpd89_data, sizeof(vpd89_data));
627 return sizeof(vpd89_data);
628 }
629
630
631 static unsigned char vpdb0_data[] = {
632 /* from 4th byte */ 0,0,0,4,
633 0,0,0x4,0,
634 0,0,0,64,
635 };
636
637 static int inquiry_evpd_b0(unsigned char * arr)
638 {
639 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
640 if (sdebug_store_sectors > 0x400) {
641 arr[4] = (sdebug_store_sectors >> 24) & 0xff;
642 arr[5] = (sdebug_store_sectors >> 16) & 0xff;
643 arr[6] = (sdebug_store_sectors >> 8) & 0xff;
644 arr[7] = sdebug_store_sectors & 0xff;
645 }
646 return sizeof(vpdb0_data);
647 }
648
649
650 #define SDEBUG_LONG_INQ_SZ 96
651 #define SDEBUG_MAX_INQ_ARR_SZ 584
652
653 static int resp_inquiry(struct scsi_cmnd * scp, int target,
654 struct sdebug_dev_info * devip)
655 {
656 unsigned char pq_pdt;
657 unsigned char * arr;
658 unsigned char *cmd = (unsigned char *)scp->cmnd;
659 int alloc_len, n, ret;
660
661 alloc_len = (cmd[3] << 8) + cmd[4];
662 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
663 if (! arr)
664 return DID_REQUEUE << 16;
665 if (devip->wlun)
666 pq_pdt = 0x1e; /* present, wlun */
667 else if (scsi_debug_no_lun_0 && (0 == devip->lun))
668 pq_pdt = 0x7f; /* not present, no device type */
669 else
670 pq_pdt = (scsi_debug_ptype & 0x1f);
671 arr[0] = pq_pdt;
672 if (0x2 & cmd[1]) { /* CMDDT bit set */
673 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
674 0);
675 kfree(arr);
676 return check_condition_result;
677 } else if (0x1 & cmd[1]) { /* EVPD bit set */
678 int lu_id_num, port_group_id, target_dev_id, len;
679 char lu_id_str[6];
680 int host_no = devip->sdbg_host->shost->host_no;
681
682 port_group_id = (((host_no + 1) & 0x7f) << 8) +
683 (devip->channel & 0x7f);
684 if (0 == scsi_debug_vpd_use_hostno)
685 host_no = 0;
686 lu_id_num = devip->wlun ? -1 : (((host_no + 1) * 2000) +
687 (devip->target * 1000) + devip->lun);
688 target_dev_id = ((host_no + 1) * 2000) +
689 (devip->target * 1000) - 3;
690 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
691 if (0 == cmd[2]) { /* supported vital product data pages */
692 arr[1] = cmd[2]; /*sanity */
693 n = 4;
694 arr[n++] = 0x0; /* this page */
695 arr[n++] = 0x80; /* unit serial number */
696 arr[n++] = 0x83; /* device identification */
697 arr[n++] = 0x84; /* software interface ident. */
698 arr[n++] = 0x85; /* management network addresses */
699 arr[n++] = 0x86; /* extended inquiry */
700 arr[n++] = 0x87; /* mode page policy */
701 arr[n++] = 0x88; /* SCSI ports */
702 arr[n++] = 0x89; /* ATA information */
703 arr[n++] = 0xb0; /* Block limits (SBC) */
704 arr[3] = n - 4; /* number of supported VPD pages */
705 } else if (0x80 == cmd[2]) { /* unit serial number */
706 arr[1] = cmd[2]; /*sanity */
707 arr[3] = len;
708 memcpy(&arr[4], lu_id_str, len);
709 } else if (0x83 == cmd[2]) { /* device identification */
710 arr[1] = cmd[2]; /*sanity */
711 arr[3] = inquiry_evpd_83(&arr[4], port_group_id,
712 target_dev_id, lu_id_num,
713 lu_id_str, len);
714 } else if (0x84 == cmd[2]) { /* Software interface ident. */
715 arr[1] = cmd[2]; /*sanity */
716 arr[3] = inquiry_evpd_84(&arr[4]);
717 } else if (0x85 == cmd[2]) { /* Management network addresses */
718 arr[1] = cmd[2]; /*sanity */
719 arr[3] = inquiry_evpd_85(&arr[4]);
720 } else if (0x86 == cmd[2]) { /* extended inquiry */
721 arr[1] = cmd[2]; /*sanity */
722 arr[3] = 0x3c; /* number of following entries */
723 arr[4] = 0x0; /* no protection stuff */
724 arr[5] = 0x7; /* head of q, ordered + simple q's */
725 } else if (0x87 == cmd[2]) { /* mode page policy */
726 arr[1] = cmd[2]; /*sanity */
727 arr[3] = 0x8; /* number of following entries */
728 arr[4] = 0x2; /* disconnect-reconnect mp */
729 arr[6] = 0x80; /* mlus, shared */
730 arr[8] = 0x18; /* protocol specific lu */
731 arr[10] = 0x82; /* mlus, per initiator port */
732 } else if (0x88 == cmd[2]) { /* SCSI Ports */
733 arr[1] = cmd[2]; /*sanity */
734 arr[3] = inquiry_evpd_88(&arr[4], target_dev_id);
735 } else if (0x89 == cmd[2]) { /* ATA information */
736 arr[1] = cmd[2]; /*sanity */
737 n = inquiry_evpd_89(&arr[4]);
738 arr[2] = (n >> 8);
739 arr[3] = (n & 0xff);
740 } else if (0xb0 == cmd[2]) { /* Block limits (SBC) */
741 arr[1] = cmd[2]; /*sanity */
742 arr[3] = inquiry_evpd_b0(&arr[4]);
743 } else {
744 /* Illegal request, invalid field in cdb */
745 mk_sense_buffer(devip, ILLEGAL_REQUEST,
746 INVALID_FIELD_IN_CDB, 0);
747 kfree(arr);
748 return check_condition_result;
749 }
750 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
751 ret = fill_from_dev_buffer(scp, arr,
752 min(len, SDEBUG_MAX_INQ_ARR_SZ));
753 kfree(arr);
754 return ret;
755 }
756 /* drops through here for a standard inquiry */
757 arr[1] = DEV_REMOVEABLE(target) ? 0x80 : 0; /* Removable disk */
758 arr[2] = scsi_debug_scsi_level;
759 arr[3] = 2; /* response_data_format==2 */
760 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
761 if (0 == scsi_debug_vpd_use_hostno)
762 arr[5] = 0x10; /* claim: implicit TGPS */
763 arr[6] = 0x10; /* claim: MultiP */
764 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
765 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
766 memcpy(&arr[8], inq_vendor_id, 8);
767 memcpy(&arr[16], inq_product_id, 16);
768 memcpy(&arr[32], inq_product_rev, 4);
769 /* version descriptors (2 bytes each) follow */
770 arr[58] = 0x0; arr[59] = 0x77; /* SAM-3 ANSI */
771 arr[60] = 0x3; arr[61] = 0x14; /* SPC-3 ANSI */
772 n = 62;
773 if (scsi_debug_ptype == 0) {
774 arr[n++] = 0x3; arr[n++] = 0x3d; /* SBC-2 ANSI */
775 } else if (scsi_debug_ptype == 1) {
776 arr[n++] = 0x3; arr[n++] = 0x60; /* SSC-2 no version */
777 }
778 arr[n++] = 0xc; arr[n++] = 0xf; /* SAS-1.1 rev 10 */
779 ret = fill_from_dev_buffer(scp, arr,
780 min(alloc_len, SDEBUG_LONG_INQ_SZ));
781 kfree(arr);
782 return ret;
783 }
784
785 static int resp_requests(struct scsi_cmnd * scp,
786 struct sdebug_dev_info * devip)
787 {
788 unsigned char * sbuff;
789 unsigned char *cmd = (unsigned char *)scp->cmnd;
790 unsigned char arr[SDEBUG_SENSE_LEN];
791 int want_dsense;
792 int len = 18;
793
794 memset(arr, 0, sizeof(arr));
795 if (devip->reset == 1)
796 mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0);
797 want_dsense = !!(cmd[1] & 1) || scsi_debug_dsense;
798 sbuff = devip->sense_buff;
799 if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
800 if (want_dsense) {
801 arr[0] = 0x72;
802 arr[1] = 0x0; /* NO_SENSE in sense_key */
803 arr[2] = THRESHOLD_EXCEEDED;
804 arr[3] = 0xff; /* TEST set and MRIE==6 */
805 } else {
806 arr[0] = 0x70;
807 arr[2] = 0x0; /* NO_SENSE in sense_key */
808 arr[7] = 0xa; /* 18 byte sense buffer */
809 arr[12] = THRESHOLD_EXCEEDED;
810 arr[13] = 0xff; /* TEST set and MRIE==6 */
811 }
812 } else {
813 memcpy(arr, sbuff, SDEBUG_SENSE_LEN);
814 if ((cmd[1] & 1) && (! scsi_debug_dsense)) {
815 /* DESC bit set and sense_buff in fixed format */
816 memset(arr, 0, sizeof(arr));
817 arr[0] = 0x72;
818 arr[1] = sbuff[2]; /* sense key */
819 arr[2] = sbuff[12]; /* asc */
820 arr[3] = sbuff[13]; /* ascq */
821 len = 8;
822 }
823 }
824 mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0);
825 return fill_from_dev_buffer(scp, arr, len);
826 }
827
828 static int resp_start_stop(struct scsi_cmnd * scp,
829 struct sdebug_dev_info * devip)
830 {
831 unsigned char *cmd = (unsigned char *)scp->cmnd;
832 int power_cond, errsts, start;
833
834 if ((errsts = check_readiness(scp, 1, devip)))
835 return errsts;
836 power_cond = (cmd[4] & 0xf0) >> 4;
837 if (power_cond) {
838 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
839 0);
840 return check_condition_result;
841 }
842 start = cmd[4] & 1;
843 if (start == devip->stopped)
844 devip->stopped = !start;
845 return 0;
846 }
847
848 static sector_t get_sdebug_capacity(void)
849 {
850 if (scsi_debug_virtual_gb > 0)
851 return 2048 * 1024 * scsi_debug_virtual_gb;
852 else
853 return sdebug_store_sectors;
854 }
855
856 #define SDEBUG_READCAP_ARR_SZ 8
857 static int resp_readcap(struct scsi_cmnd * scp,
858 struct sdebug_dev_info * devip)
859 {
860 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
861 unsigned int capac;
862 int errsts;
863
864 if ((errsts = check_readiness(scp, 1, devip)))
865 return errsts;
866 /* following just in case virtual_gb changed */
867 sdebug_capacity = get_sdebug_capacity();
868 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
869 if (sdebug_capacity < 0xffffffff) {
870 capac = (unsigned int)sdebug_capacity - 1;
871 arr[0] = (capac >> 24);
872 arr[1] = (capac >> 16) & 0xff;
873 arr[2] = (capac >> 8) & 0xff;
874 arr[3] = capac & 0xff;
875 } else {
876 arr[0] = 0xff;
877 arr[1] = 0xff;
878 arr[2] = 0xff;
879 arr[3] = 0xff;
880 }
881 arr[6] = (SECT_SIZE_PER(target) >> 8) & 0xff;
882 arr[7] = SECT_SIZE_PER(target) & 0xff;
883 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
884 }
885
886 #define SDEBUG_READCAP16_ARR_SZ 32
887 static int resp_readcap16(struct scsi_cmnd * scp,
888 struct sdebug_dev_info * devip)
889 {
890 unsigned char *cmd = (unsigned char *)scp->cmnd;
891 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
892 unsigned long long capac;
893 int errsts, k, alloc_len;
894
895 if ((errsts = check_readiness(scp, 1, devip)))
896 return errsts;
897 alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8)
898 + cmd[13]);
899 /* following just in case virtual_gb changed */
900 sdebug_capacity = get_sdebug_capacity();
901 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
902 capac = sdebug_capacity - 1;
903 for (k = 0; k < 8; ++k, capac >>= 8)
904 arr[7 - k] = capac & 0xff;
905 arr[8] = (SECT_SIZE_PER(target) >> 24) & 0xff;
906 arr[9] = (SECT_SIZE_PER(target) >> 16) & 0xff;
907 arr[10] = (SECT_SIZE_PER(target) >> 8) & 0xff;
908 arr[11] = SECT_SIZE_PER(target) & 0xff;
909 return fill_from_dev_buffer(scp, arr,
910 min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
911 }
912
913 #define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
914
915 static int resp_report_tgtpgs(struct scsi_cmnd * scp,
916 struct sdebug_dev_info * devip)
917 {
918 unsigned char *cmd = (unsigned char *)scp->cmnd;
919 unsigned char * arr;
920 int host_no = devip->sdbg_host->shost->host_no;
921 int n, ret, alen, rlen;
922 int port_group_a, port_group_b, port_a, port_b;
923
924 alen = ((cmd[6] << 24) + (cmd[7] << 16) + (cmd[8] << 8)
925 + cmd[9]);
926
927 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
928 if (! arr)
929 return DID_REQUEUE << 16;
930 /*
931 * EVPD page 0x88 states we have two ports, one
932 * real and a fake port with no device connected.
933 * So we create two port groups with one port each
934 * and set the group with port B to unavailable.
935 */
936 port_a = 0x1; /* relative port A */
937 port_b = 0x2; /* relative port B */
938 port_group_a = (((host_no + 1) & 0x7f) << 8) +
939 (devip->channel & 0x7f);
940 port_group_b = (((host_no + 1) & 0x7f) << 8) +
941 (devip->channel & 0x7f) + 0x80;
942
943 /*
944 * The asymmetric access state is cycled according to the host_id.
945 */
946 n = 4;
947 if (0 == scsi_debug_vpd_use_hostno) {
948 arr[n++] = host_no % 3; /* Asymm access state */
949 arr[n++] = 0x0F; /* claim: all states are supported */
950 } else {
951 arr[n++] = 0x0; /* Active/Optimized path */
952 arr[n++] = 0x01; /* claim: only support active/optimized paths */
953 }
954 arr[n++] = (port_group_a >> 8) & 0xff;
955 arr[n++] = port_group_a & 0xff;
956 arr[n++] = 0; /* Reserved */
957 arr[n++] = 0; /* Status code */
958 arr[n++] = 0; /* Vendor unique */
959 arr[n++] = 0x1; /* One port per group */
960 arr[n++] = 0; /* Reserved */
961 arr[n++] = 0; /* Reserved */
962 arr[n++] = (port_a >> 8) & 0xff;
963 arr[n++] = port_a & 0xff;
964 arr[n++] = 3; /* Port unavailable */
965 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
966 arr[n++] = (port_group_b >> 8) & 0xff;
967 arr[n++] = port_group_b & 0xff;
968 arr[n++] = 0; /* Reserved */
969 arr[n++] = 0; /* Status code */
970 arr[n++] = 0; /* Vendor unique */
971 arr[n++] = 0x1; /* One port per group */
972 arr[n++] = 0; /* Reserved */
973 arr[n++] = 0; /* Reserved */
974 arr[n++] = (port_b >> 8) & 0xff;
975 arr[n++] = port_b & 0xff;
976
977 rlen = n - 4;
978 arr[0] = (rlen >> 24) & 0xff;
979 arr[1] = (rlen >> 16) & 0xff;
980 arr[2] = (rlen >> 8) & 0xff;
981 arr[3] = rlen & 0xff;
982
983 /*
984 * Return the smallest value of either
985 * - The allocated length
986 * - The constructed command length
987 * - The maximum array size
988 */
989 rlen = min(alen,n);
990 ret = fill_from_dev_buffer(scp, arr,
991 min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
992 kfree(arr);
993 return ret;
994 }
995
996 /* <<Following mode page info copied from ST318451LW>> */
997
998 static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target)
999 { /* Read-Write Error Recovery page for mode_sense */
1000 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
1001 5, 0, 0xff, 0xff};
1002
1003 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
1004 if (1 == pcontrol)
1005 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
1006 return sizeof(err_recov_pg);
1007 }
1008
1009 static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target)
1010 { /* Disconnect-Reconnect page for mode_sense */
1011 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
1012 0, 0, 0, 0, 0, 0, 0, 0};
1013
1014 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
1015 if (1 == pcontrol)
1016 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
1017 return sizeof(disconnect_pg);
1018 }
1019
1020 static int resp_format_pg(unsigned char * p, int pcontrol, int target)
1021 { /* Format device page for mode_sense */
1022 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
1023 0, 0, 0, 0, 0, 0, 0, 0,
1024 0, 0, 0, 0, 0x40, 0, 0, 0};
1025
1026 memcpy(p, format_pg, sizeof(format_pg));
1027 p[10] = (sdebug_sectors_per >> 8) & 0xff;
1028 p[11] = sdebug_sectors_per & 0xff;
1029 p[12] = (SECT_SIZE >> 8) & 0xff;
1030 p[13] = SECT_SIZE & 0xff;
1031 if (DEV_REMOVEABLE(target))
1032 p[20] |= 0x20; /* should agree with INQUIRY */
1033 if (1 == pcontrol)
1034 memset(p + 2, 0, sizeof(format_pg) - 2);
1035 return sizeof(format_pg);
1036 }
1037
1038 static int resp_caching_pg(unsigned char * p, int pcontrol, int target)
1039 { /* Caching page for mode_sense */
1040 unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
1041 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
1042
1043 memcpy(p, caching_pg, sizeof(caching_pg));
1044 if (1 == pcontrol)
1045 memset(p + 2, 0, sizeof(caching_pg) - 2);
1046 return sizeof(caching_pg);
1047 }
1048
1049 static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
1050 { /* Control mode page for mode_sense */
1051 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
1052 0, 0, 0, 0};
1053 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
1054 0, 0, 0x2, 0x4b};
1055
1056 if (scsi_debug_dsense)
1057 ctrl_m_pg[2] |= 0x4;
1058 else
1059 ctrl_m_pg[2] &= ~0x4;
1060 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
1061 if (1 == pcontrol)
1062 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
1063 else if (2 == pcontrol)
1064 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
1065 return sizeof(ctrl_m_pg);
1066 }
1067
1068
1069 static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target)
1070 { /* Informational Exceptions control mode page for mode_sense */
1071 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
1072 0, 0, 0x0, 0x0};
1073 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1074 0, 0, 0x0, 0x0};
1075
1076 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
1077 if (1 == pcontrol)
1078 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
1079 else if (2 == pcontrol)
1080 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
1081 return sizeof(iec_m_pg);
1082 }
1083
1084 static int resp_sas_sf_m_pg(unsigned char * p, int pcontrol, int target)
1085 { /* SAS SSP mode page - short format for mode_sense */
1086 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
1087 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
1088
1089 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
1090 if (1 == pcontrol)
1091 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
1092 return sizeof(sas_sf_m_pg);
1093 }
1094
1095
1096 static int resp_sas_pcd_m_spg(unsigned char * p, int pcontrol, int target,
1097 int target_dev_id)
1098 { /* SAS phy control and discover mode page for mode_sense */
1099 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
1100 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
1101 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1102 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1103 0x2, 0, 0, 0, 0, 0, 0, 0,
1104 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1105 0, 0, 0, 0, 0, 0, 0, 0,
1106 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
1107 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1108 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1109 0x3, 0, 0, 0, 0, 0, 0, 0,
1110 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1111 0, 0, 0, 0, 0, 0, 0, 0,
1112 };
1113 int port_a, port_b;
1114
1115 port_a = target_dev_id + 1;
1116 port_b = port_a + 1;
1117 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
1118 p[20] = (port_a >> 24);
1119 p[21] = (port_a >> 16) & 0xff;
1120 p[22] = (port_a >> 8) & 0xff;
1121 p[23] = port_a & 0xff;
1122 p[48 + 20] = (port_b >> 24);
1123 p[48 + 21] = (port_b >> 16) & 0xff;
1124 p[48 + 22] = (port_b >> 8) & 0xff;
1125 p[48 + 23] = port_b & 0xff;
1126 if (1 == pcontrol)
1127 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
1128 return sizeof(sas_pcd_m_pg);
1129 }
1130
1131 static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol)
1132 { /* SAS SSP shared protocol specific port mode subpage */
1133 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
1134 0, 0, 0, 0, 0, 0, 0, 0,
1135 };
1136
1137 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
1138 if (1 == pcontrol)
1139 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
1140 return sizeof(sas_sha_m_pg);
1141 }
1142
1143 #define SDEBUG_MAX_MSENSE_SZ 256
1144
1145 static int resp_mode_sense(struct scsi_cmnd * scp, int target,
1146 struct sdebug_dev_info * devip)
1147 {
1148 unsigned char dbd, llbaa;
1149 int pcontrol, pcode, subpcode, bd_len;
1150 unsigned char dev_spec;
1151 int k, alloc_len, msense_6, offset, len, errsts, target_dev_id;
1152 unsigned char * ap;
1153 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
1154 unsigned char *cmd = (unsigned char *)scp->cmnd;
1155
1156 if ((errsts = check_readiness(scp, 1, devip)))
1157 return errsts;
1158 dbd = !!(cmd[1] & 0x8);
1159 pcontrol = (cmd[2] & 0xc0) >> 6;
1160 pcode = cmd[2] & 0x3f;
1161 subpcode = cmd[3];
1162 msense_6 = (MODE_SENSE == cmd[0]);
1163 llbaa = msense_6 ? 0 : !!(cmd[1] & 0x10);
1164 if ((0 == scsi_debug_ptype) && (0 == dbd))
1165 bd_len = llbaa ? 16 : 8;
1166 else
1167 bd_len = 0;
1168 alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]);
1169 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
1170 if (0x3 == pcontrol) { /* Saving values not supported */
1171 mk_sense_buffer(devip, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP,
1172 0);
1173 return check_condition_result;
1174 }
1175 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
1176 (devip->target * 1000) - 3;
1177 /* set DPOFUA bit for disks */
1178 if (0 == scsi_debug_ptype)
1179 dev_spec = (DEV_READONLY(target) ? 0x80 : 0x0) | 0x10;
1180 else
1181 dev_spec = 0x0;
1182 if (msense_6) {
1183 arr[2] = dev_spec;
1184 arr[3] = bd_len;
1185 offset = 4;
1186 } else {
1187 arr[3] = dev_spec;
1188 if (16 == bd_len)
1189 arr[4] = 0x1; /* set LONGLBA bit */
1190 arr[7] = bd_len; /* assume 255 or less */
1191 offset = 8;
1192 }
1193 ap = arr + offset;
1194 if ((bd_len > 0) && (!sdebug_capacity))
1195 sdebug_capacity = get_sdebug_capacity();
1196
1197 if (8 == bd_len) {
1198 if (sdebug_capacity > 0xfffffffe) {
1199 ap[0] = 0xff;
1200 ap[1] = 0xff;
1201 ap[2] = 0xff;
1202 ap[3] = 0xff;
1203 } else {
1204 ap[0] = (sdebug_capacity >> 24) & 0xff;
1205 ap[1] = (sdebug_capacity >> 16) & 0xff;
1206 ap[2] = (sdebug_capacity >> 8) & 0xff;
1207 ap[3] = sdebug_capacity & 0xff;
1208 }
1209 ap[6] = (SECT_SIZE_PER(target) >> 8) & 0xff;
1210 ap[7] = SECT_SIZE_PER(target) & 0xff;
1211 offset += bd_len;
1212 ap = arr + offset;
1213 } else if (16 == bd_len) {
1214 unsigned long long capac = sdebug_capacity;
1215
1216 for (k = 0; k < 8; ++k, capac >>= 8)
1217 ap[7 - k] = capac & 0xff;
1218 ap[12] = (SECT_SIZE_PER(target) >> 24) & 0xff;
1219 ap[13] = (SECT_SIZE_PER(target) >> 16) & 0xff;
1220 ap[14] = (SECT_SIZE_PER(target) >> 8) & 0xff;
1221 ap[15] = SECT_SIZE_PER(target) & 0xff;
1222 offset += bd_len;
1223 ap = arr + offset;
1224 }
1225
1226 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
1227 /* TODO: Control Extension page */
1228 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
1229 0);
1230 return check_condition_result;
1231 }
1232 switch (pcode) {
1233 case 0x1: /* Read-Write error recovery page, direct access */
1234 len = resp_err_recov_pg(ap, pcontrol, target);
1235 offset += len;
1236 break;
1237 case 0x2: /* Disconnect-Reconnect page, all devices */
1238 len = resp_disconnect_pg(ap, pcontrol, target);
1239 offset += len;
1240 break;
1241 case 0x3: /* Format device page, direct access */
1242 len = resp_format_pg(ap, pcontrol, target);
1243 offset += len;
1244 break;
1245 case 0x8: /* Caching page, direct access */
1246 len = resp_caching_pg(ap, pcontrol, target);
1247 offset += len;
1248 break;
1249 case 0xa: /* Control Mode page, all devices */
1250 len = resp_ctrl_m_pg(ap, pcontrol, target);
1251 offset += len;
1252 break;
1253 case 0x19: /* if spc==1 then sas phy, control+discover */
1254 if ((subpcode > 0x2) && (subpcode < 0xff)) {
1255 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1256 INVALID_FIELD_IN_CDB, 0);
1257 return check_condition_result;
1258 }
1259 len = 0;
1260 if ((0x0 == subpcode) || (0xff == subpcode))
1261 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
1262 if ((0x1 == subpcode) || (0xff == subpcode))
1263 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
1264 target_dev_id);
1265 if ((0x2 == subpcode) || (0xff == subpcode))
1266 len += resp_sas_sha_m_spg(ap + len, pcontrol);
1267 offset += len;
1268 break;
1269 case 0x1c: /* Informational Exceptions Mode page, all devices */
1270 len = resp_iec_m_pg(ap, pcontrol, target);
1271 offset += len;
1272 break;
1273 case 0x3f: /* Read all Mode pages */
1274 if ((0 == subpcode) || (0xff == subpcode)) {
1275 len = resp_err_recov_pg(ap, pcontrol, target);
1276 len += resp_disconnect_pg(ap + len, pcontrol, target);
1277 len += resp_format_pg(ap + len, pcontrol, target);
1278 len += resp_caching_pg(ap + len, pcontrol, target);
1279 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
1280 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
1281 if (0xff == subpcode) {
1282 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
1283 target, target_dev_id);
1284 len += resp_sas_sha_m_spg(ap + len, pcontrol);
1285 }
1286 len += resp_iec_m_pg(ap + len, pcontrol, target);
1287 } else {
1288 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1289 INVALID_FIELD_IN_CDB, 0);
1290 return check_condition_result;
1291 }
1292 offset += len;
1293 break;
1294 default:
1295 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
1296 0);
1297 return check_condition_result;
1298 }
1299 if (msense_6)
1300 arr[0] = offset - 1;
1301 else {
1302 arr[0] = ((offset - 2) >> 8) & 0xff;
1303 arr[1] = (offset - 2) & 0xff;
1304 }
1305 return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
1306 }
1307
1308 #define SDEBUG_MAX_MSELECT_SZ 512
1309
1310 static int resp_mode_select(struct scsi_cmnd * scp, int mselect6,
1311 struct sdebug_dev_info * devip)
1312 {
1313 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
1314 int param_len, res, errsts, mpage;
1315 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
1316 unsigned char *cmd = (unsigned char *)scp->cmnd;
1317
1318 if ((errsts = check_readiness(scp, 1, devip)))
1319 return errsts;
1320 memset(arr, 0, sizeof(arr));
1321 pf = cmd[1] & 0x10;
1322 sp = cmd[1] & 0x1;
1323 param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]);
1324 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
1325 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1326 INVALID_FIELD_IN_CDB, 0);
1327 return check_condition_result;
1328 }
1329 res = fetch_to_dev_buffer(scp, arr, param_len);
1330 if (-1 == res)
1331 return (DID_ERROR << 16);
1332 else if ((res < param_len) &&
1333 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
1334 printk(KERN_INFO "scsi_debug: mode_select: cdb indicated=%d, "
1335 " IO sent=%d bytes\n", param_len, res);
1336 md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2);
1337 bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]);
1338 if (md_len > 2) {
1339 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1340 INVALID_FIELD_IN_PARAM_LIST, 0);
1341 return check_condition_result;
1342 }
1343 off = bd_len + (mselect6 ? 4 : 8);
1344 mpage = arr[off] & 0x3f;
1345 ps = !!(arr[off] & 0x80);
1346 if (ps) {
1347 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1348 INVALID_FIELD_IN_PARAM_LIST, 0);
1349 return check_condition_result;
1350 }
1351 spf = !!(arr[off] & 0x40);
1352 pg_len = spf ? ((arr[off + 2] << 8) + arr[off + 3] + 4) :
1353 (arr[off + 1] + 2);
1354 if ((pg_len + off) > param_len) {
1355 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1356 PARAMETER_LIST_LENGTH_ERR, 0);
1357 return check_condition_result;
1358 }
1359 switch (mpage) {
1360 case 0xa: /* Control Mode page */
1361 if (ctrl_m_pg[1] == arr[off + 1]) {
1362 memcpy(ctrl_m_pg + 2, arr + off + 2,
1363 sizeof(ctrl_m_pg) - 2);
1364 scsi_debug_dsense = !!(ctrl_m_pg[2] & 0x4);
1365 return 0;
1366 }
1367 break;
1368 case 0x1c: /* Informational Exceptions Mode page */
1369 if (iec_m_pg[1] == arr[off + 1]) {
1370 memcpy(iec_m_pg + 2, arr + off + 2,
1371 sizeof(iec_m_pg) - 2);
1372 return 0;
1373 }
1374 break;
1375 default:
1376 break;
1377 }
1378 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1379 INVALID_FIELD_IN_PARAM_LIST, 0);
1380 return check_condition_result;
1381 }
1382
1383 static int resp_temp_l_pg(unsigned char * arr)
1384 {
1385 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
1386 0x0, 0x1, 0x3, 0x2, 0x0, 65,
1387 };
1388
1389 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
1390 return sizeof(temp_l_pg);
1391 }
1392
1393 static int resp_ie_l_pg(unsigned char * arr)
1394 {
1395 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
1396 };
1397
1398 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
1399 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
1400 arr[4] = THRESHOLD_EXCEEDED;
1401 arr[5] = 0xff;
1402 }
1403 return sizeof(ie_l_pg);
1404 }
1405
1406 #define SDEBUG_MAX_LSENSE_SZ 512
1407
1408 static int resp_log_sense(struct scsi_cmnd * scp,
1409 struct sdebug_dev_info * devip)
1410 {
1411 int ppc, sp, pcontrol, pcode, subpcode, alloc_len, errsts, len, n;
1412 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
1413 unsigned char *cmd = (unsigned char *)scp->cmnd;
1414
1415 if ((errsts = check_readiness(scp, 1, devip)))
1416 return errsts;
1417 memset(arr, 0, sizeof(arr));
1418 ppc = cmd[1] & 0x2;
1419 sp = cmd[1] & 0x1;
1420 if (ppc || sp) {
1421 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1422 INVALID_FIELD_IN_CDB, 0);
1423 return check_condition_result;
1424 }
1425 pcontrol = (cmd[2] & 0xc0) >> 6;
1426 pcode = cmd[2] & 0x3f;
1427 subpcode = cmd[3] & 0xff;
1428 alloc_len = (cmd[7] << 8) + cmd[8];
1429 arr[0] = pcode;
1430 if (0 == subpcode) {
1431 switch (pcode) {
1432 case 0x0: /* Supported log pages log page */
1433 n = 4;
1434 arr[n++] = 0x0; /* this page */
1435 arr[n++] = 0xd; /* Temperature */
1436 arr[n++] = 0x2f; /* Informational exceptions */
1437 arr[3] = n - 4;
1438 break;
1439 case 0xd: /* Temperature log page */
1440 arr[3] = resp_temp_l_pg(arr + 4);
1441 break;
1442 case 0x2f: /* Informational exceptions log page */
1443 arr[3] = resp_ie_l_pg(arr + 4);
1444 break;
1445 default:
1446 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1447 INVALID_FIELD_IN_CDB, 0);
1448 return check_condition_result;
1449 }
1450 } else if (0xff == subpcode) {
1451 arr[0] |= 0x40;
1452 arr[1] = subpcode;
1453 switch (pcode) {
1454 case 0x0: /* Supported log pages and subpages log page */
1455 n = 4;
1456 arr[n++] = 0x0;
1457 arr[n++] = 0x0; /* 0,0 page */
1458 arr[n++] = 0x0;
1459 arr[n++] = 0xff; /* this page */
1460 arr[n++] = 0xd;
1461 arr[n++] = 0x0; /* Temperature */
1462 arr[n++] = 0x2f;
1463 arr[n++] = 0x0; /* Informational exceptions */
1464 arr[3] = n - 4;
1465 break;
1466 case 0xd: /* Temperature subpages */
1467 n = 4;
1468 arr[n++] = 0xd;
1469 arr[n++] = 0x0; /* Temperature */
1470 arr[3] = n - 4;
1471 break;
1472 case 0x2f: /* Informational exceptions subpages */
1473 n = 4;
1474 arr[n++] = 0x2f;
1475 arr[n++] = 0x0; /* Informational exceptions */
1476 arr[3] = n - 4;
1477 break;
1478 default:
1479 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1480 INVALID_FIELD_IN_CDB, 0);
1481 return check_condition_result;
1482 }
1483 } else {
1484 mk_sense_buffer(devip, ILLEGAL_REQUEST,
1485 INVALID_FIELD_IN_CDB, 0);
1486 return check_condition_result;
1487 }
1488 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
1489 return fill_from_dev_buffer(scp, arr,
1490 min(len, SDEBUG_MAX_INQ_ARR_SZ));
1491 }
1492
1493 static int check_device_access_params(struct sdebug_dev_info *devi,
1494 unsigned long long lba, unsigned int num)
1495 {
1496 if (lba + num > sdebug_capacity) {
1497 mk_sense_buffer(devi, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE, 0);
1498 return check_condition_result;
1499 }
1500 /* transfer length excessive (tie in to block limits VPD page) */
1501 if (num > sdebug_store_sectors) {
1502 mk_sense_buffer(devi, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
1503 return check_condition_result;
1504 }
1505 return 0;
1506 }
1507
1508 static int do_device_access(struct scsi_cmnd *scmd,
1509 struct sdebug_dev_info *devi,
1510 unsigned long long lba, unsigned int num, int write)
1511 {
1512 int ret;
1513 unsigned int block, rest = 0;
1514 int (*func)(struct scsi_cmnd *, unsigned char *, int);
1515
1516 func = write ? fetch_to_dev_buffer : fill_from_dev_buffer;
1517
1518 block = do_div(lba, sdebug_store_sectors);
1519 if (block + num > sdebug_store_sectors)
1520 rest = block + num - sdebug_store_sectors;
1521
1522 ret = func(scmd, fake_storep + (block * SECT_SIZE),
1523 (num - rest) * SECT_SIZE);
1524 if (!ret && rest)
1525 ret = func(scmd, fake_storep, rest * SECT_SIZE);
1526
1527 return ret;
1528 }
1529
1530 static int resp_read(struct scsi_cmnd *SCpnt, unsigned long long lba,
1531 unsigned int num, struct sdebug_dev_info *devip)
1532 {
1533 unsigned long iflags;
1534 int ret;
1535
1536 ret = check_device_access_params(devip, lba, num);
1537 if (ret)
1538 return ret;
1539
1540 if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) &&
1541 (lba <= OPT_MEDIUM_ERR_ADDR) &&
1542 ((lba + num) > OPT_MEDIUM_ERR_ADDR)) {
1543 /* claim unrecoverable read error */
1544 mk_sense_buffer(devip, MEDIUM_ERROR, UNRECOVERED_READ_ERR,
1545 0);
1546 /* set info field and valid bit for fixed descriptor */
1547 if (0x70 == (devip->sense_buff[0] & 0x7f)) {
1548 devip->sense_buff[0] |= 0x80; /* Valid bit */
1549 ret = OPT_MEDIUM_ERR_ADDR;
1550 devip->sense_buff[3] = (ret >> 24) & 0xff;
1551 devip->sense_buff[4] = (ret >> 16) & 0xff;
1552 devip->sense_buff[5] = (ret >> 8) & 0xff;
1553 devip->sense_buff[6] = ret & 0xff;
1554 }
1555 return check_condition_result;
1556 }
1557 read_lock_irqsave(&atomic_rw, iflags);
1558 ret = do_device_access(SCpnt, devip, lba, num, 0);
1559 read_unlock_irqrestore(&atomic_rw, iflags);
1560 return ret;
1561 }
1562
1563 static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba,
1564 unsigned int num, struct sdebug_dev_info *devip)
1565 {
1566 unsigned long iflags;
1567 int ret;
1568
1569 ret = check_device_access_params(devip, lba, num);
1570 if (ret)
1571 return ret;
1572
1573 write_lock_irqsave(&atomic_rw, iflags);
1574 ret = do_device_access(SCpnt, devip, lba, num, 1);
1575 write_unlock_irqrestore(&atomic_rw, iflags);
1576 if (-1 == ret)
1577 return (DID_ERROR << 16);
1578 else if ((ret < (num * SECT_SIZE)) &&
1579 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
1580 printk(KERN_INFO "scsi_debug: write: cdb indicated=%u, "
1581 " IO sent=%d bytes\n", num * SECT_SIZE, ret);
1582 return 0;
1583 }
1584
1585 #define SDEBUG_RLUN_ARR_SZ 256
1586
1587 static int resp_report_luns(struct scsi_cmnd * scp,
1588 struct sdebug_dev_info * devip)
1589 {
1590 unsigned int alloc_len;
1591 int lun_cnt, i, upper, num, n, wlun, lun;
1592 unsigned char *cmd = (unsigned char *)scp->cmnd;
1593 int select_report = (int)cmd[2];
1594 struct scsi_lun *one_lun;
1595 unsigned char arr[SDEBUG_RLUN_ARR_SZ];
1596 unsigned char * max_addr;
1597
1598 alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
1599 if ((alloc_len < 4) || (select_report > 2)) {
1600 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
1601 0);
1602 return check_condition_result;
1603 }
1604 /* can produce response with up to 16k luns (lun 0 to lun 16383) */
1605 memset(arr, 0, SDEBUG_RLUN_ARR_SZ);
1606 lun_cnt = scsi_debug_max_luns;
1607 if (1 == select_report)
1608 lun_cnt = 0;
1609 else if (scsi_debug_no_lun_0 && (lun_cnt > 0))
1610 --lun_cnt;
1611 wlun = (select_report > 0) ? 1 : 0;
1612 num = lun_cnt + wlun;
1613 arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff;
1614 arr[3] = (sizeof(struct scsi_lun) * num) & 0xff;
1615 n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) /
1616 sizeof(struct scsi_lun)), num);
1617 if (n < num) {
1618 wlun = 0;
1619 lun_cnt = n;
1620 }
1621 one_lun = (struct scsi_lun *) &arr[8];
1622 max_addr = arr + SDEBUG_RLUN_ARR_SZ;
1623 for (i = 0, lun = (scsi_debug_no_lun_0 ? 1 : 0);
1624 ((i < lun_cnt) && ((unsigned char *)(one_lun + i) < max_addr));
1625 i++, lun++) {
1626 upper = (lun >> 8) & 0x3f;
1627 if (upper)
1628 one_lun[i].scsi_lun[0] =
1629 (upper | (SAM2_LUN_ADDRESS_METHOD << 6));
1630 one_lun[i].scsi_lun[1] = lun & 0xff;
1631 }
1632 if (wlun) {
1633 one_lun[i].scsi_lun[0] = (SAM2_WLUN_REPORT_LUNS >> 8) & 0xff;
1634 one_lun[i].scsi_lun[1] = SAM2_WLUN_REPORT_LUNS & 0xff;
1635 i++;
1636 }
1637 alloc_len = (unsigned char *)(one_lun + i) - arr;
1638 return fill_from_dev_buffer(scp, arr,
1639 min((int)alloc_len, SDEBUG_RLUN_ARR_SZ));
1640 }
1641
1642 static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
1643 unsigned int num, struct sdebug_dev_info *devip)
1644 {
1645 int i, j, ret = -1;
1646 unsigned char *kaddr, *buf;
1647 unsigned int offset;
1648 struct scatterlist *sg;
1649 struct scsi_data_buffer *sdb = scsi_in(scp);
1650
1651 /* better not to use temporary buffer. */
1652 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
1653 if (!buf)
1654 return ret;
1655
1656 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
1657
1658 offset = 0;
1659 for_each_sg(sdb->table.sgl, sg, sdb->table.nents, i) {
1660 kaddr = (unsigned char *)kmap_atomic(sg_page(sg), KM_USER0);
1661 if (!kaddr)
1662 goto out;
1663
1664 for (j = 0; j < sg->length; j++)
1665 *(kaddr + sg->offset + j) ^= *(buf + offset + j);
1666
1667 offset += sg->length;
1668 kunmap_atomic(kaddr, KM_USER0);
1669 }
1670 ret = 0;
1671 out:
1672 kfree(buf);
1673
1674 return ret;
1675 }
1676
1677 /* When timer goes off this function is called. */
1678 static void timer_intr_handler(unsigned long indx)
1679 {
1680 struct sdebug_queued_cmd * sqcp;
1681 unsigned long iflags;
1682
1683 if (indx >= SCSI_DEBUG_CANQUEUE) {
1684 printk(KERN_ERR "scsi_debug:timer_intr_handler: indx too "
1685 "large\n");
1686 return;
1687 }
1688 spin_lock_irqsave(&queued_arr_lock, iflags);
1689 sqcp = &queued_arr[(int)indx];
1690 if (! sqcp->in_use) {
1691 printk(KERN_ERR "scsi_debug:timer_intr_handler: Unexpected "
1692 "interrupt\n");
1693 spin_unlock_irqrestore(&queued_arr_lock, iflags);
1694 return;
1695 }
1696 sqcp->in_use = 0;
1697 if (sqcp->done_funct) {
1698 sqcp->a_cmnd->result = sqcp->scsi_result;
1699 sqcp->done_funct(sqcp->a_cmnd); /* callback to mid level */
1700 }
1701 sqcp->done_funct = NULL;
1702 spin_unlock_irqrestore(&queued_arr_lock, iflags);
1703 }
1704
1705
1706 static struct sdebug_dev_info *
1707 sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags)
1708 {
1709 struct sdebug_dev_info *devip;
1710
1711 devip = kzalloc(sizeof(*devip), flags);
1712 if (devip) {
1713 devip->sdbg_host = sdbg_host;
1714 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
1715 }
1716 return devip;
1717 }
1718
1719 static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev)
1720 {
1721 struct sdebug_host_info * sdbg_host;
1722 struct sdebug_dev_info * open_devip = NULL;
1723 struct sdebug_dev_info * devip =
1724 (struct sdebug_dev_info *)sdev->hostdata;
1725
1726 if (devip)
1727 return devip;
1728 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
1729 if (!sdbg_host) {
1730 printk(KERN_ERR "Host info NULL\n");
1731 return NULL;
1732 }
1733 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
1734 if ((devip->used) && (devip->channel == sdev->channel) &&
1735 (devip->target == sdev->id) &&
1736 (devip->lun == sdev->lun))
1737 return devip;
1738 else {
1739 if ((!devip->used) && (!open_devip))
1740 open_devip = devip;
1741 }
1742 }
1743 if (!open_devip) { /* try and make a new one */
1744 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
1745 if (!open_devip) {
1746 printk(KERN_ERR "%s: out of memory at line %d\n",
1747 __FUNCTION__, __LINE__);
1748 return NULL;
1749 }
1750 }
1751
1752 open_devip->channel = sdev->channel;
1753 open_devip->target = sdev->id;
1754 open_devip->lun = sdev->lun;
1755 open_devip->sdbg_host = sdbg_host;
1756 open_devip->reset = 1;
1757 open_devip->used = 1;
1758 memset(open_devip->sense_buff, 0, SDEBUG_SENSE_LEN);
1759 if (scsi_debug_dsense)
1760 open_devip->sense_buff[0] = 0x72;
1761 else {
1762 open_devip->sense_buff[0] = 0x70;
1763 open_devip->sense_buff[7] = 0xa;
1764 }
1765 if (sdev->lun == SAM2_WLUN_REPORT_LUNS)
1766 open_devip->wlun = SAM2_WLUN_REPORT_LUNS & 0xff;
1767
1768 return open_devip;
1769 }
1770
1771 static int scsi_debug_slave_alloc(struct scsi_device *sdp)
1772 {
1773 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
1774 printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %u>\n",
1775 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
1776 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue);
1777 return 0;
1778 }
1779
1780 static int scsi_debug_slave_configure(struct scsi_device *sdp)
1781 {
1782 struct sdebug_dev_info *devip;
1783
1784 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
1785 printk(KERN_INFO "scsi_debug: slave_configure <%u %u %u %u>\n",
1786 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
1787 if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN)
1788 sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN;
1789 devip = devInfoReg(sdp);
1790 if (NULL == devip)
1791 return 1; /* no resources, will be marked offline */
1792 sdp->hostdata = devip;
1793 if (sdp->host->cmd_per_lun)
1794 scsi_adjust_queue_depth(sdp, SDEBUG_TAGGED_QUEUING,
1795 sdp->host->cmd_per_lun);
1796 blk_queue_max_segment_size(sdp->request_queue, 256 * 1024);
1797 return 0;
1798 }
1799
1800 static void scsi_debug_slave_destroy(struct scsi_device *sdp)
1801 {
1802 struct sdebug_dev_info *devip =
1803 (struct sdebug_dev_info *)sdp->hostdata;
1804
1805 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
1806 printk(KERN_INFO "scsi_debug: slave_destroy <%u %u %u %u>\n",
1807 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
1808 if (devip) {
1809 /* make this slot avaliable for re-use */
1810 devip->used = 0;
1811 sdp->hostdata = NULL;
1812 }
1813 }
1814
1815 /* Returns 1 if found 'cmnd' and deleted its timer. else returns 0 */
1816 static int stop_queued_cmnd(struct scsi_cmnd *cmnd)
1817 {
1818 unsigned long iflags;
1819 int k;
1820 struct sdebug_queued_cmd *sqcp;
1821
1822 spin_lock_irqsave(&queued_arr_lock, iflags);
1823 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
1824 sqcp = &queued_arr[k];
1825 if (sqcp->in_use && (cmnd == sqcp->a_cmnd)) {
1826 del_timer_sync(&sqcp->cmnd_timer);
1827 sqcp->in_use = 0;
1828 sqcp->a_cmnd = NULL;
1829 break;
1830 }
1831 }
1832 spin_unlock_irqrestore(&queued_arr_lock, iflags);
1833 return (k < SCSI_DEBUG_CANQUEUE) ? 1 : 0;
1834 }
1835
1836 /* Deletes (stops) timers of all queued commands */
1837 static void stop_all_queued(void)
1838 {
1839 unsigned long iflags;
1840 int k;
1841 struct sdebug_queued_cmd *sqcp;
1842
1843 spin_lock_irqsave(&queued_arr_lock, iflags);
1844 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
1845 sqcp = &queued_arr[k];
1846 if (sqcp->in_use && sqcp->a_cmnd) {
1847 del_timer_sync(&sqcp->cmnd_timer);
1848 sqcp->in_use = 0;
1849 sqcp->a_cmnd = NULL;
1850 }
1851 }
1852 spin_unlock_irqrestore(&queued_arr_lock, iflags);
1853 }
1854
1855 static int scsi_debug_abort(struct scsi_cmnd * SCpnt)
1856 {
1857 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
1858 printk(KERN_INFO "scsi_debug: abort\n");
1859 ++num_aborts;
1860 stop_queued_cmnd(SCpnt);
1861 return SUCCESS;
1862 }
1863
1864 static int scsi_debug_biosparam(struct scsi_device *sdev,
1865 struct block_device * bdev, sector_t capacity, int *info)
1866 {
1867 int res;
1868 unsigned char *buf;
1869
1870 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
1871 printk(KERN_INFO "scsi_debug: biosparam\n");
1872 buf = scsi_bios_ptable(bdev);
1873 if (buf) {
1874 res = scsi_partsize(buf, capacity,
1875 &info[2], &info[0], &info[1]);
1876 kfree(buf);
1877 if (! res)
1878 return res;
1879 }
1880 info[0] = sdebug_heads;
1881 info[1] = sdebug_sectors_per;
1882 info[2] = sdebug_cylinders_per;
1883 return 0;
1884 }
1885
1886 static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
1887 {
1888 struct sdebug_dev_info * devip;
1889
1890 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
1891 printk(KERN_INFO "scsi_debug: device_reset\n");
1892 ++num_dev_resets;
1893 if (SCpnt) {
1894 devip = devInfoReg(SCpnt->device);
1895 if (devip)
1896 devip->reset = 1;
1897 }
1898 return SUCCESS;
1899 }
1900
1901 static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
1902 {
1903 struct sdebug_host_info *sdbg_host;
1904 struct sdebug_dev_info * dev_info;
1905 struct scsi_device * sdp;
1906 struct Scsi_Host * hp;
1907
1908 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
1909 printk(KERN_INFO "scsi_debug: bus_reset\n");
1910 ++num_bus_resets;
1911 if (SCpnt && ((sdp = SCpnt->device)) && ((hp = sdp->host))) {
1912 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
1913 if (sdbg_host) {
1914 list_for_each_entry(dev_info,
1915 &sdbg_host->dev_info_list,
1916 dev_list)
1917 dev_info->reset = 1;
1918 }
1919 }
1920 return SUCCESS;
1921 }
1922
1923 static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
1924 {
1925 struct sdebug_host_info * sdbg_host;
1926 struct sdebug_dev_info * dev_info;
1927
1928 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
1929 printk(KERN_INFO "scsi_debug: host_reset\n");
1930 ++num_host_resets;
1931 spin_lock(&sdebug_host_list_lock);
1932 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
1933 list_for_each_entry(dev_info, &sdbg_host->dev_info_list,
1934 dev_list)
1935 dev_info->reset = 1;
1936 }
1937 spin_unlock(&sdebug_host_list_lock);
1938 stop_all_queued();
1939 return SUCCESS;
1940 }
1941
1942 /* Initializes timers in queued array */
1943 static void __init init_all_queued(void)
1944 {
1945 unsigned long iflags;
1946 int k;
1947 struct sdebug_queued_cmd * sqcp;
1948
1949 spin_lock_irqsave(&queued_arr_lock, iflags);
1950 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
1951 sqcp = &queued_arr[k];
1952 init_timer(&sqcp->cmnd_timer);
1953 sqcp->in_use = 0;
1954 sqcp->a_cmnd = NULL;
1955 }
1956 spin_unlock_irqrestore(&queued_arr_lock, iflags);
1957 }
1958
1959 static void __init sdebug_build_parts(unsigned char *ramp,
1960 unsigned long store_size)
1961 {
1962 struct partition * pp;
1963 int starts[SDEBUG_MAX_PARTS + 2];
1964 int sectors_per_part, num_sectors, k;
1965 int heads_by_sects, start_sec, end_sec;
1966
1967 /* assume partition table already zeroed */
1968 if ((scsi_debug_num_parts < 1) || (store_size < 1048576))
1969 return;
1970 if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) {
1971 scsi_debug_num_parts = SDEBUG_MAX_PARTS;
1972 printk(KERN_WARNING "scsi_debug:build_parts: reducing "
1973 "partitions to %d\n", SDEBUG_MAX_PARTS);
1974 }
1975 num_sectors = (int)sdebug_store_sectors;
1976 sectors_per_part = (num_sectors - sdebug_sectors_per)
1977 / scsi_debug_num_parts;
1978 heads_by_sects = sdebug_heads * sdebug_sectors_per;
1979 starts[0] = sdebug_sectors_per;
1980 for (k = 1; k < scsi_debug_num_parts; ++k)
1981 starts[k] = ((k * sectors_per_part) / heads_by_sects)
1982 * heads_by_sects;
1983 starts[scsi_debug_num_parts] = num_sectors;
1984 starts[scsi_debug_num_parts + 1] = 0;
1985
1986 ramp[510] = 0x55; /* magic partition markings */
1987 ramp[511] = 0xAA;
1988 pp = (struct partition *)(ramp + 0x1be);
1989 for (k = 0; starts[k + 1]; ++k, ++pp) {
1990 start_sec = starts[k];
1991 end_sec = starts[k + 1] - 1;
1992 pp->boot_ind = 0;
1993
1994 pp->cyl = start_sec / heads_by_sects;
1995 pp->head = (start_sec - (pp->cyl * heads_by_sects))
1996 / sdebug_sectors_per;
1997 pp->sector = (start_sec % sdebug_sectors_per) + 1;
1998
1999 pp->end_cyl = end_sec / heads_by_sects;
2000 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
2001 / sdebug_sectors_per;
2002 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
2003
2004 pp->start_sect = start_sec;
2005 pp->nr_sects = end_sec - start_sec + 1;
2006 pp->sys_ind = 0x83; /* plain Linux partition */
2007 }
2008 }
2009
2010 static int schedule_resp(struct scsi_cmnd * cmnd,
2011 struct sdebug_dev_info * devip,
2012 done_funct_t done, int scsi_result, int delta_jiff)
2013 {
2014 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmnd) {
2015 if (scsi_result) {
2016 struct scsi_device * sdp = cmnd->device;
2017
2018 printk(KERN_INFO "scsi_debug: <%u %u %u %u> "
2019 "non-zero result=0x%x\n", sdp->host->host_no,
2020 sdp->channel, sdp->id, sdp->lun, scsi_result);
2021 }
2022 }
2023 if (cmnd && devip) {
2024 /* simulate autosense by this driver */
2025 if (SAM_STAT_CHECK_CONDITION == (scsi_result & 0xff))
2026 memcpy(cmnd->sense_buffer, devip->sense_buff,
2027 (SCSI_SENSE_BUFFERSIZE > SDEBUG_SENSE_LEN) ?
2028 SDEBUG_SENSE_LEN : SCSI_SENSE_BUFFERSIZE);
2029 }
2030 if (delta_jiff <= 0) {
2031 if (cmnd)
2032 cmnd->result = scsi_result;
2033 if (done)
2034 done(cmnd);
2035 return 0;
2036 } else {
2037 unsigned long iflags;
2038 int k;
2039 struct sdebug_queued_cmd * sqcp = NULL;
2040
2041 spin_lock_irqsave(&queued_arr_lock, iflags);
2042 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
2043 sqcp = &queued_arr[k];
2044 if (! sqcp->in_use)
2045 break;
2046 }
2047 if (k >= SCSI_DEBUG_CANQUEUE) {
2048 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2049 printk(KERN_WARNING "scsi_debug: can_queue exceeded\n");
2050 return 1; /* report busy to mid level */
2051 }
2052 sqcp->in_use = 1;
2053 sqcp->a_cmnd = cmnd;
2054 sqcp->scsi_result = scsi_result;
2055 sqcp->done_funct = done;
2056 sqcp->cmnd_timer.function = timer_intr_handler;
2057 sqcp->cmnd_timer.data = k;
2058 sqcp->cmnd_timer.expires = jiffies + delta_jiff;
2059 add_timer(&sqcp->cmnd_timer);
2060 spin_unlock_irqrestore(&queued_arr_lock, iflags);
2061 if (cmnd)
2062 cmnd->result = 0;
2063 return 0;
2064 }
2065 }
2066 /* Note: The following macros create attribute files in the
2067 /sys/module/scsi_debug/parameters directory. Unfortunately this
2068 driver is unaware of a change and cannot trigger auxiliary actions
2069 as it can when the corresponding attribute in the
2070 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
2071 */
2072 module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR);
2073 module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR);
2074 module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO);
2075 module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR);
2076 module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR);
2077 module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR);
2078 module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR);
2079 module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR);
2080 module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO);
2081 module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR);
2082 module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR);
2083 module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR);
2084 module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO);
2085 module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR);
2086 module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int,
2087 S_IRUGO | S_IWUSR);
2088
2089 MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
2090 MODULE_DESCRIPTION("SCSI debug adapter driver");
2091 MODULE_LICENSE("GPL");
2092 MODULE_VERSION(SCSI_DEBUG_VERSION);
2093
2094 MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
2095 MODULE_PARM_DESC(delay, "# of jiffies to delay response(def=1)");
2096 MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs(def=8)");
2097 MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
2098 MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
2099 MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
2100 MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
2101 MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
2102 MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
2103 MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
2104 MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
2105 MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
2106 MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])");
2107 MODULE_PARM_DESC(virtual_gb, "virtual gigabyte size (def=0 -> use dev_size_mb)");
2108 MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
2109
2110
2111 static char sdebug_info[256];
2112
2113 static const char * scsi_debug_info(struct Scsi_Host * shp)
2114 {
2115 sprintf(sdebug_info, "scsi_debug, version %s [%s], "
2116 "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION,
2117 scsi_debug_version_date, scsi_debug_dev_size_mb,
2118 scsi_debug_opts);
2119 return sdebug_info;
2120 }
2121
2122 /* scsi_debug_proc_info
2123 * Used if the driver currently has no own support for /proc/scsi
2124 */
2125 static int scsi_debug_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset,
2126 int length, int inout)
2127 {
2128 int len, pos, begin;
2129 int orig_length;
2130
2131 orig_length = length;
2132
2133 if (inout == 1) {
2134 char arr[16];
2135 int minLen = length > 15 ? 15 : length;
2136
2137 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
2138 return -EACCES;
2139 memcpy(arr, buffer, minLen);
2140 arr[minLen] = '\0';
2141 if (1 != sscanf(arr, "%d", &pos))
2142 return -EINVAL;
2143 scsi_debug_opts = pos;
2144 if (scsi_debug_every_nth != 0)
2145 scsi_debug_cmnd_count = 0;
2146 return length;
2147 }
2148 begin = 0;
2149 pos = len = sprintf(buffer, "scsi_debug adapter driver, version "
2150 "%s [%s]\n"
2151 "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, "
2152 "every_nth=%d(curr:%d)\n"
2153 "delay=%d, max_luns=%d, scsi_level=%d\n"
2154 "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n"
2155 "number of aborts=%d, device_reset=%d, bus_resets=%d, "
2156 "host_resets=%d\n",
2157 SCSI_DEBUG_VERSION, scsi_debug_version_date, scsi_debug_num_tgts,
2158 scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth,
2159 scsi_debug_cmnd_count, scsi_debug_delay,
2160 scsi_debug_max_luns, scsi_debug_scsi_level,
2161 SECT_SIZE, sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per,
2162 num_aborts, num_dev_resets, num_bus_resets, num_host_resets);
2163 if (pos < offset) {
2164 len = 0;
2165 begin = pos;
2166 }
2167 *start = buffer + (offset - begin); /* Start of wanted data */
2168 len -= (offset - begin);
2169 if (len > length)
2170 len = length;
2171 return len;
2172 }
2173
2174 static ssize_t sdebug_delay_show(struct device_driver * ddp, char * buf)
2175 {
2176 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay);
2177 }
2178
2179 static ssize_t sdebug_delay_store(struct device_driver * ddp,
2180 const char * buf, size_t count)
2181 {
2182 int delay;
2183 char work[20];
2184
2185 if (1 == sscanf(buf, "%10s", work)) {
2186 if ((1 == sscanf(work, "%d", &delay)) && (delay >= 0)) {
2187 scsi_debug_delay = delay;
2188 return count;
2189 }
2190 }
2191 return -EINVAL;
2192 }
2193 DRIVER_ATTR(delay, S_IRUGO | S_IWUSR, sdebug_delay_show,
2194 sdebug_delay_store);
2195
2196 static ssize_t sdebug_opts_show(struct device_driver * ddp, char * buf)
2197 {
2198 return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts);
2199 }
2200
2201 static ssize_t sdebug_opts_store(struct device_driver * ddp,
2202 const char * buf, size_t count)
2203 {
2204 int opts;
2205 char work[20];
2206
2207 if (1 == sscanf(buf, "%10s", work)) {
2208 if (0 == strnicmp(work,"0x", 2)) {
2209 if (1 == sscanf(&work[2], "%x", &opts))
2210 goto opts_done;
2211 } else {
2212 if (1 == sscanf(work, "%d", &opts))
2213 goto opts_done;
2214 }
2215 }
2216 return -EINVAL;
2217 opts_done:
2218 scsi_debug_opts = opts;
2219 scsi_debug_cmnd_count = 0;
2220 return count;
2221 }
2222 DRIVER_ATTR(opts, S_IRUGO | S_IWUSR, sdebug_opts_show,
2223 sdebug_opts_store);
2224
2225 static ssize_t sdebug_ptype_show(struct device_driver * ddp, char * buf)
2226 {
2227 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype);
2228 }
2229 static ssize_t sdebug_ptype_store(struct device_driver * ddp,
2230 const char * buf, size_t count)
2231 {
2232 int n;
2233
2234 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2235 scsi_debug_ptype = n;
2236 return count;
2237 }
2238 return -EINVAL;
2239 }
2240 DRIVER_ATTR(ptype, S_IRUGO | S_IWUSR, sdebug_ptype_show, sdebug_ptype_store);
2241
2242 static ssize_t sdebug_dsense_show(struct device_driver * ddp, char * buf)
2243 {
2244 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense);
2245 }
2246 static ssize_t sdebug_dsense_store(struct device_driver * ddp,
2247 const char * buf, size_t count)
2248 {
2249 int n;
2250
2251 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2252 scsi_debug_dsense = n;
2253 return count;
2254 }
2255 return -EINVAL;
2256 }
2257 DRIVER_ATTR(dsense, S_IRUGO | S_IWUSR, sdebug_dsense_show,
2258 sdebug_dsense_store);
2259
2260 static ssize_t sdebug_fake_rw_show(struct device_driver * ddp, char * buf)
2261 {
2262 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw);
2263 }
2264 static ssize_t sdebug_fake_rw_store(struct device_driver * ddp,
2265 const char * buf, size_t count)
2266 {
2267 int n;
2268
2269 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2270 scsi_debug_fake_rw = n;
2271 return count;
2272 }
2273 return -EINVAL;
2274 }
2275 DRIVER_ATTR(fake_rw, S_IRUGO | S_IWUSR, sdebug_fake_rw_show,
2276 sdebug_fake_rw_store);
2277
2278 static ssize_t sdebug_no_lun_0_show(struct device_driver * ddp, char * buf)
2279 {
2280 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0);
2281 }
2282 static ssize_t sdebug_no_lun_0_store(struct device_driver * ddp,
2283 const char * buf, size_t count)
2284 {
2285 int n;
2286
2287 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2288 scsi_debug_no_lun_0 = n;
2289 return count;
2290 }
2291 return -EINVAL;
2292 }
2293 DRIVER_ATTR(no_lun_0, S_IRUGO | S_IWUSR, sdebug_no_lun_0_show,
2294 sdebug_no_lun_0_store);
2295
2296 static ssize_t sdebug_num_tgts_show(struct device_driver * ddp, char * buf)
2297 {
2298 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts);
2299 }
2300 static ssize_t sdebug_num_tgts_store(struct device_driver * ddp,
2301 const char * buf, size_t count)
2302 {
2303 int n;
2304
2305 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2306 scsi_debug_num_tgts = n;
2307 sdebug_max_tgts_luns();
2308 return count;
2309 }
2310 return -EINVAL;
2311 }
2312 DRIVER_ATTR(num_tgts, S_IRUGO | S_IWUSR, sdebug_num_tgts_show,
2313 sdebug_num_tgts_store);
2314
2315 static ssize_t sdebug_dev_size_mb_show(struct device_driver * ddp, char * buf)
2316 {
2317 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb);
2318 }
2319 DRIVER_ATTR(dev_size_mb, S_IRUGO, sdebug_dev_size_mb_show, NULL);
2320
2321 static ssize_t sdebug_num_parts_show(struct device_driver * ddp, char * buf)
2322 {
2323 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts);
2324 }
2325 DRIVER_ATTR(num_parts, S_IRUGO, sdebug_num_parts_show, NULL);
2326
2327 static ssize_t sdebug_every_nth_show(struct device_driver * ddp, char * buf)
2328 {
2329 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth);
2330 }
2331 static ssize_t sdebug_every_nth_store(struct device_driver * ddp,
2332 const char * buf, size_t count)
2333 {
2334 int nth;
2335
2336 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
2337 scsi_debug_every_nth = nth;
2338 scsi_debug_cmnd_count = 0;
2339 return count;
2340 }
2341 return -EINVAL;
2342 }
2343 DRIVER_ATTR(every_nth, S_IRUGO | S_IWUSR, sdebug_every_nth_show,
2344 sdebug_every_nth_store);
2345
2346 static ssize_t sdebug_max_luns_show(struct device_driver * ddp, char * buf)
2347 {
2348 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns);
2349 }
2350 static ssize_t sdebug_max_luns_store(struct device_driver * ddp,
2351 const char * buf, size_t count)
2352 {
2353 int n;
2354
2355 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2356 scsi_debug_max_luns = n;
2357 sdebug_max_tgts_luns();
2358 return count;
2359 }
2360 return -EINVAL;
2361 }
2362 DRIVER_ATTR(max_luns, S_IRUGO | S_IWUSR, sdebug_max_luns_show,
2363 sdebug_max_luns_store);
2364
2365 static ssize_t sdebug_scsi_level_show(struct device_driver * ddp, char * buf)
2366 {
2367 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level);
2368 }
2369 DRIVER_ATTR(scsi_level, S_IRUGO, sdebug_scsi_level_show, NULL);
2370
2371 static ssize_t sdebug_virtual_gb_show(struct device_driver * ddp, char * buf)
2372 {
2373 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb);
2374 }
2375 static ssize_t sdebug_virtual_gb_store(struct device_driver * ddp,
2376 const char * buf, size_t count)
2377 {
2378 int n;
2379
2380 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2381 scsi_debug_virtual_gb = n;
2382
2383 sdebug_capacity = get_sdebug_capacity();
2384
2385 return count;
2386 }
2387 return -EINVAL;
2388 }
2389 DRIVER_ATTR(virtual_gb, S_IRUGO | S_IWUSR, sdebug_virtual_gb_show,
2390 sdebug_virtual_gb_store);
2391
2392 static ssize_t sdebug_add_host_show(struct device_driver * ddp, char * buf)
2393 {
2394 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host);
2395 }
2396
2397 static ssize_t sdebug_add_host_store(struct device_driver * ddp,
2398 const char * buf, size_t count)
2399 {
2400 int delta_hosts;
2401
2402 if (sscanf(buf, "%d", &delta_hosts) != 1)
2403 return -EINVAL;
2404 if (delta_hosts > 0) {
2405 do {
2406 sdebug_add_adapter();
2407 } while (--delta_hosts);
2408 } else if (delta_hosts < 0) {
2409 do {
2410 sdebug_remove_adapter();
2411 } while (++delta_hosts);
2412 }
2413 return count;
2414 }
2415 DRIVER_ATTR(add_host, S_IRUGO | S_IWUSR, sdebug_add_host_show,
2416 sdebug_add_host_store);
2417
2418 static ssize_t sdebug_vpd_use_hostno_show(struct device_driver * ddp,
2419 char * buf)
2420 {
2421 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_vpd_use_hostno);
2422 }
2423 static ssize_t sdebug_vpd_use_hostno_store(struct device_driver * ddp,
2424 const char * buf, size_t count)
2425 {
2426 int n;
2427
2428 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
2429 scsi_debug_vpd_use_hostno = n;
2430 return count;
2431 }
2432 return -EINVAL;
2433 }
2434 DRIVER_ATTR(vpd_use_hostno, S_IRUGO | S_IWUSR, sdebug_vpd_use_hostno_show,
2435 sdebug_vpd_use_hostno_store);
2436
2437 /* Note: The following function creates attribute files in the
2438 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
2439 files (over those found in the /sys/module/scsi_debug/parameters
2440 directory) is that auxiliary actions can be triggered when an attribute
2441 is changed. For example see: sdebug_add_host_store() above.
2442 */
2443 static int do_create_driverfs_files(void)
2444 {
2445 int ret;
2446
2447 ret = driver_create_file(&sdebug_driverfs_driver, &driver_attr_add_host);
2448 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_delay);
2449 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb);
2450 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dsense);
2451 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_every_nth);
2452 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_fake_rw);
2453 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_luns);
2454 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_no_lun_0);
2455 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_parts);
2456 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_tgts);
2457 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ptype);
2458 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_opts);
2459 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_scsi_level);
2460 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb);
2461 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno);
2462 return ret;
2463 }
2464
2465 static void do_remove_driverfs_files(void)
2466 {
2467 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno);
2468 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb);
2469 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_scsi_level);
2470 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_opts);
2471 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ptype);
2472 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_tgts);
2473 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_parts);
2474 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_no_lun_0);
2475 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_luns);
2476 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_fake_rw);
2477 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_every_nth);
2478 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dsense);
2479 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb);
2480 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_delay);
2481 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_add_host);
2482 }
2483
2484 static void pseudo_0_release(struct device *dev)
2485 {
2486 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2487 printk(KERN_INFO "scsi_debug: pseudo_0_release() called\n");
2488 }
2489
2490 static struct device pseudo_primary = {
2491 .bus_id = "pseudo_0",
2492 .release = pseudo_0_release,
2493 };
2494
2495 static int __init scsi_debug_init(void)
2496 {
2497 unsigned long sz;
2498 int host_to_add;
2499 int k;
2500 int ret;
2501
2502 if (scsi_debug_dev_size_mb < 1)
2503 scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
2504 sz = (unsigned long)scsi_debug_dev_size_mb * 1048576;
2505 sdebug_store_sectors = sz / SECT_SIZE;
2506 sdebug_capacity = get_sdebug_capacity();
2507
2508 /* play around with geometry, don't waste too much on track 0 */
2509 sdebug_heads = 8;
2510 sdebug_sectors_per = 32;
2511 if (scsi_debug_dev_size_mb >= 16)
2512 sdebug_heads = 32;
2513 else if (scsi_debug_dev_size_mb >= 256)
2514 sdebug_heads = 64;
2515 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
2516 (sdebug_sectors_per * sdebug_heads);
2517 if (sdebug_cylinders_per >= 1024) {
2518 /* other LLDs do this; implies >= 1GB ram disk ... */
2519 sdebug_heads = 255;
2520 sdebug_sectors_per = 63;
2521 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
2522 (sdebug_sectors_per * sdebug_heads);
2523 }
2524
2525 fake_storep = vmalloc(sz);
2526 if (NULL == fake_storep) {
2527 printk(KERN_ERR "scsi_debug_init: out of memory, 1\n");
2528 return -ENOMEM;
2529 }
2530 memset(fake_storep, 0, sz);
2531 if (scsi_debug_num_parts > 0)
2532 sdebug_build_parts(fake_storep, sz);
2533
2534 ret = device_register(&pseudo_primary);
2535 if (ret < 0) {
2536 printk(KERN_WARNING "scsi_debug: device_register error: %d\n",
2537 ret);
2538 goto free_vm;
2539 }
2540 ret = bus_register(&pseudo_lld_bus);
2541 if (ret < 0) {
2542 printk(KERN_WARNING "scsi_debug: bus_register error: %d\n",
2543 ret);
2544 goto dev_unreg;
2545 }
2546 ret = driver_register(&sdebug_driverfs_driver);
2547 if (ret < 0) {
2548 printk(KERN_WARNING "scsi_debug: driver_register error: %d\n",
2549 ret);
2550 goto bus_unreg;
2551 }
2552 ret = do_create_driverfs_files();
2553 if (ret < 0) {
2554 printk(KERN_WARNING "scsi_debug: driver_create_file error: %d\n",
2555 ret);
2556 goto del_files;
2557 }
2558
2559 init_all_queued();
2560
2561 host_to_add = scsi_debug_add_host;
2562 scsi_debug_add_host = 0;
2563
2564 for (k = 0; k < host_to_add; k++) {
2565 if (sdebug_add_adapter()) {
2566 printk(KERN_ERR "scsi_debug_init: "
2567 "sdebug_add_adapter failed k=%d\n", k);
2568 break;
2569 }
2570 }
2571
2572 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
2573 printk(KERN_INFO "scsi_debug_init: built %d host(s)\n",
2574 scsi_debug_add_host);
2575 }
2576 return 0;
2577
2578 del_files:
2579 do_remove_driverfs_files();
2580 driver_unregister(&sdebug_driverfs_driver);
2581 bus_unreg:
2582 bus_unregister(&pseudo_lld_bus);
2583 dev_unreg:
2584 device_unregister(&pseudo_primary);
2585 free_vm:
2586 vfree(fake_storep);
2587
2588 return ret;
2589 }
2590
2591 static void __exit scsi_debug_exit(void)
2592 {
2593 int k = scsi_debug_add_host;
2594
2595 stop_all_queued();
2596 for (; k; k--)
2597 sdebug_remove_adapter();
2598 do_remove_driverfs_files();
2599 driver_unregister(&sdebug_driverfs_driver);
2600 bus_unregister(&pseudo_lld_bus);
2601 device_unregister(&pseudo_primary);
2602
2603 vfree(fake_storep);
2604 }
2605
2606 device_initcall(scsi_debug_init);
2607 module_exit(scsi_debug_exit);
2608
2609 static void sdebug_release_adapter(struct device * dev)
2610 {
2611 struct sdebug_host_info *sdbg_host;
2612
2613 sdbg_host = to_sdebug_host(dev);
2614 kfree(sdbg_host);
2615 }
2616
2617 static int sdebug_add_adapter(void)
2618 {
2619 int k, devs_per_host;
2620 int error = 0;
2621 struct sdebug_host_info *sdbg_host;
2622 struct sdebug_dev_info *sdbg_devinfo, *tmp;
2623
2624 sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL);
2625 if (NULL == sdbg_host) {
2626 printk(KERN_ERR "%s: out of memory at line %d\n",
2627 __FUNCTION__, __LINE__);
2628 return -ENOMEM;
2629 }
2630
2631 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
2632
2633 devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns;
2634 for (k = 0; k < devs_per_host; k++) {
2635 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
2636 if (!sdbg_devinfo) {
2637 printk(KERN_ERR "%s: out of memory at line %d\n",
2638 __FUNCTION__, __LINE__);
2639 error = -ENOMEM;
2640 goto clean;
2641 }
2642 }
2643
2644 spin_lock(&sdebug_host_list_lock);
2645 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
2646 spin_unlock(&sdebug_host_list_lock);
2647
2648 sdbg_host->dev.bus = &pseudo_lld_bus;
2649 sdbg_host->dev.parent = &pseudo_primary;
2650 sdbg_host->dev.release = &sdebug_release_adapter;
2651 sprintf(sdbg_host->dev.bus_id, "adapter%d", scsi_debug_add_host);
2652
2653 error = device_register(&sdbg_host->dev);
2654
2655 if (error)
2656 goto clean;
2657
2658 ++scsi_debug_add_host;
2659 return error;
2660
2661 clean:
2662 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
2663 dev_list) {
2664 list_del(&sdbg_devinfo->dev_list);
2665 kfree(sdbg_devinfo);
2666 }
2667
2668 kfree(sdbg_host);
2669 return error;
2670 }
2671
2672 static void sdebug_remove_adapter(void)
2673 {
2674 struct sdebug_host_info * sdbg_host = NULL;
2675
2676 spin_lock(&sdebug_host_list_lock);
2677 if (!list_empty(&sdebug_host_list)) {
2678 sdbg_host = list_entry(sdebug_host_list.prev,
2679 struct sdebug_host_info, host_list);
2680 list_del(&sdbg_host->host_list);
2681 }
2682 spin_unlock(&sdebug_host_list_lock);
2683
2684 if (!sdbg_host)
2685 return;
2686
2687 device_unregister(&sdbg_host->dev);
2688 --scsi_debug_add_host;
2689 }
2690
2691 static
2692 int scsi_debug_queuecommand(struct scsi_cmnd *SCpnt, done_funct_t done)
2693 {
2694 unsigned char *cmd = (unsigned char *) SCpnt->cmnd;
2695 int len, k;
2696 unsigned int num;
2697 unsigned long long lba;
2698 int errsts = 0;
2699 int target = SCpnt->device->id;
2700 struct sdebug_dev_info *devip = NULL;
2701 int inj_recovered = 0;
2702 int inj_transport = 0;
2703 int delay_override = 0;
2704
2705 scsi_set_resid(SCpnt, 0);
2706 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmd) {
2707 printk(KERN_INFO "scsi_debug: cmd ");
2708 for (k = 0, len = SCpnt->cmd_len; k < len; ++k)
2709 printk("%02x ", (int)cmd[k]);
2710 printk("\n");
2711 }
2712
2713 if (target == SCpnt->device->host->hostt->this_id) {
2714 printk(KERN_INFO "scsi_debug: initiator's id used as "
2715 "target!\n");
2716 return schedule_resp(SCpnt, NULL, done,
2717 DID_NO_CONNECT << 16, 0);
2718 }
2719
2720 if ((SCpnt->device->lun >= scsi_debug_max_luns) &&
2721 (SCpnt->device->lun != SAM2_WLUN_REPORT_LUNS))
2722 return schedule_resp(SCpnt, NULL, done,
2723 DID_NO_CONNECT << 16, 0);
2724 devip = devInfoReg(SCpnt->device);
2725 if (NULL == devip)
2726 return schedule_resp(SCpnt, NULL, done,
2727 DID_NO_CONNECT << 16, 0);
2728
2729 if ((scsi_debug_every_nth != 0) &&
2730 (++scsi_debug_cmnd_count >= abs(scsi_debug_every_nth))) {
2731 scsi_debug_cmnd_count = 0;
2732 if (scsi_debug_every_nth < -1)
2733 scsi_debug_every_nth = -1;
2734 if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts)
2735 return 0; /* ignore command causing timeout */
2736 else if (SCSI_DEBUG_OPT_RECOVERED_ERR & scsi_debug_opts)
2737 inj_recovered = 1; /* to reads and writes below */
2738 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & scsi_debug_opts)
2739 inj_transport = 1; /* to reads and writes below */
2740 }
2741
2742 if (devip->wlun) {
2743 switch (*cmd) {
2744 case INQUIRY:
2745 case REQUEST_SENSE:
2746 case TEST_UNIT_READY:
2747 case REPORT_LUNS:
2748 break; /* only allowable wlun commands */
2749 default:
2750 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2751 printk(KERN_INFO "scsi_debug: Opcode: 0x%x "
2752 "not supported for wlun\n", *cmd);
2753 mk_sense_buffer(devip, ILLEGAL_REQUEST,
2754 INVALID_OPCODE, 0);
2755 errsts = check_condition_result;
2756 return schedule_resp(SCpnt, devip, done, errsts,
2757 0);
2758 }
2759 }
2760
2761 switch (*cmd) {
2762 case INQUIRY: /* mandatory, ignore unit attention */
2763 delay_override = 1;
2764 errsts = resp_inquiry(SCpnt, target, devip);
2765 break;
2766 case REQUEST_SENSE: /* mandatory, ignore unit attention */
2767 delay_override = 1;
2768 errsts = resp_requests(SCpnt, devip);
2769 break;
2770 case REZERO_UNIT: /* actually this is REWIND for SSC */
2771 case START_STOP:
2772 errsts = resp_start_stop(SCpnt, devip);
2773 break;
2774 case ALLOW_MEDIUM_REMOVAL:
2775 errsts = check_readiness(SCpnt, 1, devip);
2776 if (errsts)
2777 break;
2778 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2779 printk(KERN_INFO "scsi_debug: Medium removal %s\n",
2780 cmd[4] ? "inhibited" : "enabled");
2781 break;
2782 case SEND_DIAGNOSTIC: /* mandatory */
2783 errsts = check_readiness(SCpnt, 1, devip);
2784 break;
2785 case TEST_UNIT_READY: /* mandatory */
2786 delay_override = 1;
2787 errsts = check_readiness(SCpnt, 0, devip);
2788 break;
2789 case RESERVE:
2790 errsts = check_readiness(SCpnt, 1, devip);
2791 break;
2792 case RESERVE_10:
2793 errsts = check_readiness(SCpnt, 1, devip);
2794 break;
2795 case RELEASE:
2796 errsts = check_readiness(SCpnt, 1, devip);
2797 break;
2798 case RELEASE_10:
2799 errsts = check_readiness(SCpnt, 1, devip);
2800 break;
2801 case READ_CAPACITY:
2802 errsts = resp_readcap(SCpnt, devip);
2803 break;
2804 case SERVICE_ACTION_IN:
2805 if (SAI_READ_CAPACITY_16 != cmd[1]) {
2806 mk_sense_buffer(devip, ILLEGAL_REQUEST,
2807 INVALID_OPCODE, 0);
2808 errsts = check_condition_result;
2809 break;
2810 }
2811 errsts = resp_readcap16(SCpnt, devip);
2812 break;
2813 case MAINTENANCE_IN:
2814 if (MI_REPORT_TARGET_PGS != cmd[1]) {
2815 mk_sense_buffer(devip, ILLEGAL_REQUEST,
2816 INVALID_OPCODE, 0);
2817 errsts = check_condition_result;
2818 break;
2819 }
2820 errsts = resp_report_tgtpgs(SCpnt, devip);
2821 break;
2822 case READ_16:
2823 case READ_12:
2824 case READ_10:
2825 case READ_6:
2826 errsts = check_readiness(SCpnt, 0, devip);
2827 if (errsts)
2828 break;
2829 if (scsi_debug_fake_rw)
2830 break;
2831 get_data_transfer_info(cmd, &lba, &num);
2832 errsts = resp_read(SCpnt, lba, num, devip);
2833 if (inj_recovered && (0 == errsts)) {
2834 mk_sense_buffer(devip, RECOVERED_ERROR,
2835 THRESHOLD_EXCEEDED, 0);
2836 errsts = check_condition_result;
2837 } else if (inj_transport && (0 == errsts)) {
2838 mk_sense_buffer(devip, ABORTED_COMMAND,
2839 TRANSPORT_PROBLEM, ACK_NAK_TO);
2840 errsts = check_condition_result;
2841 }
2842 break;
2843 case REPORT_LUNS: /* mandatory, ignore unit attention */
2844 delay_override = 1;
2845 errsts = resp_report_luns(SCpnt, devip);
2846 break;
2847 case VERIFY: /* 10 byte SBC-2 command */
2848 errsts = check_readiness(SCpnt, 0, devip);
2849 break;
2850 case WRITE_16:
2851 case WRITE_12:
2852 case WRITE_10:
2853 case WRITE_6:
2854 errsts = check_readiness(SCpnt, 0, devip);
2855 if (errsts)
2856 break;
2857 if (scsi_debug_fake_rw)
2858 break;
2859 get_data_transfer_info(cmd, &lba, &num);
2860 errsts = resp_write(SCpnt, lba, num, devip);
2861 if (inj_recovered && (0 == errsts)) {
2862 mk_sense_buffer(devip, RECOVERED_ERROR,
2863 THRESHOLD_EXCEEDED, 0);
2864 errsts = check_condition_result;
2865 }
2866 break;
2867 case MODE_SENSE:
2868 case MODE_SENSE_10:
2869 errsts = resp_mode_sense(SCpnt, target, devip);
2870 break;
2871 case MODE_SELECT:
2872 errsts = resp_mode_select(SCpnt, 1, devip);
2873 break;
2874 case MODE_SELECT_10:
2875 errsts = resp_mode_select(SCpnt, 0, devip);
2876 break;
2877 case LOG_SENSE:
2878 errsts = resp_log_sense(SCpnt, devip);
2879 break;
2880 case SYNCHRONIZE_CACHE:
2881 delay_override = 1;
2882 errsts = check_readiness(SCpnt, 0, devip);
2883 break;
2884 case WRITE_BUFFER:
2885 errsts = check_readiness(SCpnt, 1, devip);
2886 break;
2887 case XDWRITEREAD_10:
2888 if (!scsi_bidi_cmnd(SCpnt)) {
2889 mk_sense_buffer(devip, ILLEGAL_REQUEST,
2890 INVALID_FIELD_IN_CDB, 0);
2891 errsts = check_condition_result;
2892 break;
2893 }
2894
2895 errsts = check_readiness(SCpnt, 0, devip);
2896 if (errsts)
2897 break;
2898 if (scsi_debug_fake_rw)
2899 break;
2900 get_data_transfer_info(cmd, &lba, &num);
2901 errsts = resp_read(SCpnt, lba, num, devip);
2902 if (errsts)
2903 break;
2904 errsts = resp_write(SCpnt, lba, num, devip);
2905 if (errsts)
2906 break;
2907 errsts = resp_xdwriteread(SCpnt, lba, num, devip);
2908 break;
2909 default:
2910 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
2911 printk(KERN_INFO "scsi_debug: Opcode: 0x%x not "
2912 "supported\n", *cmd);
2913 errsts = check_readiness(SCpnt, 1, devip);
2914 if (errsts)
2915 break; /* Unit attention takes precedence */
2916 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
2917 errsts = check_condition_result;
2918 break;
2919 }
2920 return schedule_resp(SCpnt, devip, done, errsts,
2921 (delay_override ? 0 : scsi_debug_delay));
2922 }
2923
2924 static struct scsi_host_template sdebug_driver_template = {
2925 .proc_info = scsi_debug_proc_info,
2926 .proc_name = sdebug_proc_name,
2927 .name = "SCSI DEBUG",
2928 .info = scsi_debug_info,
2929 .slave_alloc = scsi_debug_slave_alloc,
2930 .slave_configure = scsi_debug_slave_configure,
2931 .slave_destroy = scsi_debug_slave_destroy,
2932 .ioctl = scsi_debug_ioctl,
2933 .queuecommand = scsi_debug_queuecommand,
2934 .eh_abort_handler = scsi_debug_abort,
2935 .eh_bus_reset_handler = scsi_debug_bus_reset,
2936 .eh_device_reset_handler = scsi_debug_device_reset,
2937 .eh_host_reset_handler = scsi_debug_host_reset,
2938 .bios_param = scsi_debug_biosparam,
2939 .can_queue = SCSI_DEBUG_CANQUEUE,
2940 .this_id = 7,
2941 .sg_tablesize = 256,
2942 .cmd_per_lun = 16,
2943 .max_sectors = 0xffff,
2944 .use_clustering = DISABLE_CLUSTERING,
2945 .module = THIS_MODULE,
2946 };
2947
2948 static int sdebug_driver_probe(struct device * dev)
2949 {
2950 int error = 0;
2951 struct sdebug_host_info *sdbg_host;
2952 struct Scsi_Host *hpnt;
2953
2954 sdbg_host = to_sdebug_host(dev);
2955
2956 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
2957 if (NULL == hpnt) {
2958 printk(KERN_ERR "%s: scsi_register failed\n", __FUNCTION__);
2959 error = -ENODEV;
2960 return error;
2961 }
2962
2963 sdbg_host->shost = hpnt;
2964 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
2965 if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id))
2966 hpnt->max_id = scsi_debug_num_tgts + 1;
2967 else
2968 hpnt->max_id = scsi_debug_num_tgts;
2969 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; /* = scsi_debug_max_luns; */
2970
2971 error = scsi_add_host(hpnt, &sdbg_host->dev);
2972 if (error) {
2973 printk(KERN_ERR "%s: scsi_add_host failed\n", __FUNCTION__);
2974 error = -ENODEV;
2975 scsi_host_put(hpnt);
2976 } else
2977 scsi_scan_host(hpnt);
2978
2979
2980 return error;
2981 }
2982
2983 static int sdebug_driver_remove(struct device * dev)
2984 {
2985 struct sdebug_host_info *sdbg_host;
2986 struct sdebug_dev_info *sdbg_devinfo, *tmp;
2987
2988 sdbg_host = to_sdebug_host(dev);
2989
2990 if (!sdbg_host) {
2991 printk(KERN_ERR "%s: Unable to locate host info\n",
2992 __FUNCTION__);
2993 return -ENODEV;
2994 }
2995
2996 scsi_remove_host(sdbg_host->shost);
2997
2998 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
2999 dev_list) {
3000 list_del(&sdbg_devinfo->dev_list);
3001 kfree(sdbg_devinfo);
3002 }
3003
3004 scsi_host_put(sdbg_host->shost);
3005 return 0;
3006 }
3007
3008 static int pseudo_lld_bus_match(struct device *dev,
3009 struct device_driver *dev_driver)
3010 {
3011 return 1;
3012 }
3013
3014 static struct bus_type pseudo_lld_bus = {
3015 .name = "pseudo",
3016 .match = pseudo_lld_bus_match,
3017 .probe = sdebug_driver_probe,
3018 .remove = sdebug_driver_remove,
3019 };
Log-structured file system for Linux