Merge remote-tracking branch 'asoc/topic/core' into asoc-next
[linux-2.6-block.git] / drivers / scsi / scsi_sysfs.c
CommitLineData
1da177e4
LT
1/*
2 * scsi_sysfs.c
3 *
4 * SCSI sysfs interface routines.
5 *
6 * Created to pull SCSI mid layer sysfs routines into one file.
7 */
8
1da177e4 9#include <linux/module.h>
5a0e3ad6 10#include <linux/slab.h>
1da177e4
LT
11#include <linux/init.h>
12#include <linux/blkdev.h>
13#include <linux/device.h>
bc4f2401 14#include <linux/pm_runtime.h>
1da177e4
LT
15
16#include <scsi/scsi.h>
17#include <scsi/scsi_device.h>
18#include <scsi/scsi_host.h>
19#include <scsi/scsi_tcq.h>
20#include <scsi/scsi_transport.h>
44818efb 21#include <scsi/scsi_driver.h>
1da177e4
LT
22
23#include "scsi_priv.h"
24#include "scsi_logging.h"
25
b0ed4336
HR
26static struct device_type scsi_dev_type;
27
0ad78200 28static const struct {
1da177e4
LT
29 enum scsi_device_state value;
30 char *name;
31} sdev_states[] = {
32 { SDEV_CREATED, "created" },
33 { SDEV_RUNNING, "running" },
34 { SDEV_CANCEL, "cancel" },
35 { SDEV_DEL, "deleted" },
36 { SDEV_QUIESCE, "quiesce" },
37 { SDEV_OFFLINE, "offline" },
1b8d2620 38 { SDEV_TRANSPORT_OFFLINE, "transport-offline" },
1da177e4 39 { SDEV_BLOCK, "blocked" },
6f4267e3 40 { SDEV_CREATED_BLOCK, "created-blocked" },
1da177e4
LT
41};
42
43const char *scsi_device_state_name(enum scsi_device_state state)
44{
45 int i;
46 char *name = NULL;
47
6391a113 48 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
1da177e4
LT
49 if (sdev_states[i].value == state) {
50 name = sdev_states[i].name;
51 break;
52 }
53 }
54 return name;
55}
56
0ad78200 57static const struct {
d3301874
MA
58 enum scsi_host_state value;
59 char *name;
60} shost_states[] = {
61 { SHOST_CREATED, "created" },
62 { SHOST_RUNNING, "running" },
63 { SHOST_CANCEL, "cancel" },
64 { SHOST_DEL, "deleted" },
65 { SHOST_RECOVERY, "recovery" },
939647ee
JB
66 { SHOST_CANCEL_RECOVERY, "cancel/recovery" },
67 { SHOST_DEL_RECOVERY, "deleted/recovery", },
d3301874
MA
68};
69const char *scsi_host_state_name(enum scsi_host_state state)
70{
71 int i;
72 char *name = NULL;
73
6391a113 74 for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
d3301874
MA
75 if (shost_states[i].value == state) {
76 name = shost_states[i].name;
77 break;
78 }
79 }
80 return name;
81}
82
9cb78c16 83static int check_set(unsigned long long *val, char *src)
1da177e4
LT
84{
85 char *last;
86
87 if (strncmp(src, "-", 20) == 0) {
88 *val = SCAN_WILD_CARD;
89 } else {
90 /*
91 * Doesn't check for int overflow
92 */
9cb78c16 93 *val = simple_strtoull(src, &last, 0);
1da177e4
LT
94 if (*last != '\0')
95 return 1;
96 }
97 return 0;
98}
99
100static int scsi_scan(struct Scsi_Host *shost, const char *str)
101{
9cb78c16
HR
102 char s1[15], s2[15], s3[17], junk;
103 unsigned long long channel, id, lun;
1da177e4
LT
104 int res;
105
9cb78c16 106 res = sscanf(str, "%10s %10s %16s %c", s1, s2, s3, &junk);
1da177e4
LT
107 if (res != 3)
108 return -EINVAL;
109 if (check_set(&channel, s1))
110 return -EINVAL;
111 if (check_set(&id, s2))
112 return -EINVAL;
113 if (check_set(&lun, s3))
114 return -EINVAL;
e02f3f59
CH
115 if (shost->transportt->user_scan)
116 res = shost->transportt->user_scan(shost, channel, id, lun);
117 else
118 res = scsi_scan_host_selected(shost, channel, id, lun, 1);
1da177e4
LT
119 return res;
120}
121
122/*
123 * shost_show_function: macro to create an attr function that can be used to
124 * show a non-bit field.
125 */
126#define shost_show_function(name, field, format_string) \
127static ssize_t \
ee959b00
TJ
128show_##name (struct device *dev, struct device_attribute *attr, \
129 char *buf) \
1da177e4 130{ \
ee959b00 131 struct Scsi_Host *shost = class_to_shost(dev); \
1da177e4
LT
132 return snprintf (buf, 20, format_string, shost->field); \
133}
134
135/*
136 * shost_rd_attr: macro to create a function and attribute variable for a
137 * read only field.
138 */
139#define shost_rd_attr2(name, field, format_string) \
140 shost_show_function(name, field, format_string) \
ee959b00 141static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
1da177e4
LT
142
143#define shost_rd_attr(field, format_string) \
144shost_rd_attr2(field, field, format_string)
145
146/*
147 * Create the actual show/store functions and data structures.
148 */
149
ee959b00
TJ
150static ssize_t
151store_scan(struct device *dev, struct device_attribute *attr,
152 const char *buf, size_t count)
1da177e4 153{
ee959b00 154 struct Scsi_Host *shost = class_to_shost(dev);
1da177e4
LT
155 int res;
156
157 res = scsi_scan(shost, buf);
158 if (res == 0)
159 res = count;
160 return res;
161};
ee959b00 162static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan);
1da177e4 163
d3301874 164static ssize_t
ee959b00
TJ
165store_shost_state(struct device *dev, struct device_attribute *attr,
166 const char *buf, size_t count)
d3301874
MA
167{
168 int i;
ee959b00 169 struct Scsi_Host *shost = class_to_shost(dev);
d3301874
MA
170 enum scsi_host_state state = 0;
171
6391a113 172 for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
d3301874
MA
173 const int len = strlen(shost_states[i].name);
174 if (strncmp(shost_states[i].name, buf, len) == 0 &&
175 buf[len] == '\n') {
176 state = shost_states[i].value;
177 break;
178 }
179 }
180 if (!state)
181 return -EINVAL;
182
183 if (scsi_host_set_state(shost, state))
184 return -EINVAL;
185 return count;
186}
187
188static ssize_t
ee959b00 189show_shost_state(struct device *dev, struct device_attribute *attr, char *buf)
d3301874 190{
ee959b00 191 struct Scsi_Host *shost = class_to_shost(dev);
d3301874
MA
192 const char *name = scsi_host_state_name(shost->shost_state);
193
194 if (!name)
195 return -EINVAL;
196
197 return snprintf(buf, 20, "%s\n", name);
198}
199
ee959b00
TJ
200/* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */
201struct device_attribute dev_attr_hstate =
202 __ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state);
d3301874 203
5dc2b89e
FT
204static ssize_t
205show_shost_mode(unsigned int mode, char *buf)
206{
207 ssize_t len = 0;
208
209 if (mode & MODE_INITIATOR)
210 len = sprintf(buf, "%s", "Initiator");
211
212 if (mode & MODE_TARGET)
213 len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target");
214
215 len += sprintf(buf + len, "\n");
216
217 return len;
218}
219
ee959b00
TJ
220static ssize_t
221show_shost_supported_mode(struct device *dev, struct device_attribute *attr,
222 char *buf)
5dc2b89e 223{
ee959b00 224 struct Scsi_Host *shost = class_to_shost(dev);
7a39ac3f 225 unsigned int supported_mode = shost->hostt->supported_mode;
5dc2b89e 226
7a39ac3f
JB
227 if (supported_mode == MODE_UNKNOWN)
228 /* by default this should be initiator */
229 supported_mode = MODE_INITIATOR;
230
231 return show_shost_mode(supported_mode, buf);
5dc2b89e
FT
232}
233
ee959b00 234static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL);
5dc2b89e 235
ee959b00
TJ
236static ssize_t
237show_shost_active_mode(struct device *dev,
238 struct device_attribute *attr, char *buf)
5dc2b89e 239{
ee959b00 240 struct Scsi_Host *shost = class_to_shost(dev);
5dc2b89e
FT
241
242 if (shost->active_mode == MODE_UNKNOWN)
243 return snprintf(buf, 20, "unknown\n");
244 else
245 return show_shost_mode(shost->active_mode, buf);
246}
247
ee959b00 248static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL);
5dc2b89e 249
072f19b4 250static int check_reset_type(const char *str)
29443691 251{
072f19b4 252 if (sysfs_streq(str, "adapter"))
29443691 253 return SCSI_ADAPTER_RESET;
072f19b4 254 else if (sysfs_streq(str, "firmware"))
29443691
VC
255 return SCSI_FIRMWARE_RESET;
256 else
257 return 0;
258}
259
260static ssize_t
261store_host_reset(struct device *dev, struct device_attribute *attr,
262 const char *buf, size_t count)
263{
264 struct Scsi_Host *shost = class_to_shost(dev);
265 struct scsi_host_template *sht = shost->hostt;
266 int ret = -EINVAL;
29443691
VC
267 int type;
268
072f19b4 269 type = check_reset_type(buf);
29443691
VC
270 if (!type)
271 goto exit_store_host_reset;
272
273 if (sht->host_reset)
274 ret = sht->host_reset(shost, type);
275
276exit_store_host_reset:
277 if (ret == 0)
278 ret = count;
279 return ret;
280}
281
282static DEVICE_ATTR(host_reset, S_IWUSR, NULL, store_host_reset);
283
b4562022
HR
284static ssize_t
285show_shost_eh_deadline(struct device *dev,
286 struct device_attribute *attr, char *buf)
287{
288 struct Scsi_Host *shost = class_to_shost(dev);
289
bb3b621a
RM
290 if (shost->eh_deadline == -1)
291 return snprintf(buf, strlen("off") + 2, "off\n");
292 return sprintf(buf, "%u\n", shost->eh_deadline / HZ);
b4562022
HR
293}
294
295static ssize_t
296store_shost_eh_deadline(struct device *dev, struct device_attribute *attr,
297 const char *buf, size_t count)
298{
299 struct Scsi_Host *shost = class_to_shost(dev);
300 int ret = -EINVAL;
bb3b621a 301 unsigned long deadline, flags;
b4562022 302
ad469a57
HR
303 if (shost->transportt &&
304 (shost->transportt->eh_strategy_handler ||
305 !shost->hostt->eh_host_reset_handler))
b4562022
HR
306 return ret;
307
bb3b621a
RM
308 if (!strncmp(buf, "off", strlen("off")))
309 deadline = -1;
310 else {
311 ret = kstrtoul(buf, 10, &deadline);
312 if (ret)
313 return ret;
314 if (deadline * HZ > UINT_MAX)
315 return -EINVAL;
316 }
317
318 spin_lock_irqsave(shost->host_lock, flags);
319 if (scsi_host_in_recovery(shost))
320 ret = -EBUSY;
321 else {
322 if (deadline == -1)
323 shost->eh_deadline = -1;
324 else
b4562022 325 shost->eh_deadline = deadline * HZ;
bb3b621a
RM
326
327 ret = count;
b4562022 328 }
bb3b621a
RM
329 spin_unlock_irqrestore(shost->host_lock, flags);
330
b4562022
HR
331 return ret;
332}
333
334static DEVICE_ATTR(eh_deadline, S_IRUGO | S_IWUSR, show_shost_eh_deadline, store_shost_eh_deadline);
335
d285203c 336shost_rd_attr(use_blk_mq, "%d\n");
1da177e4 337shost_rd_attr(unique_id, "%u\n");
1da177e4 338shost_rd_attr(cmd_per_lun, "%hd\n");
ed632da8 339shost_rd_attr(can_queue, "%hd\n");
1da177e4 340shost_rd_attr(sg_tablesize, "%hu\n");
13f05c8d 341shost_rd_attr(sg_prot_tablesize, "%hu\n");
1da177e4 342shost_rd_attr(unchecked_isa_dma, "%d\n");
4469f987
MP
343shost_rd_attr(prot_capabilities, "%u\n");
344shost_rd_attr(prot_guard_type, "%hd\n");
1da177e4
LT
345shost_rd_attr2(proc_name, hostt->proc_name, "%s\n");
346
74665016
CH
347static ssize_t
348show_host_busy(struct device *dev, struct device_attribute *attr, char *buf)
349{
350 struct Scsi_Host *shost = class_to_shost(dev);
351 return snprintf(buf, 20, "%d\n", atomic_read(&shost->host_busy));
352}
353static DEVICE_ATTR(host_busy, S_IRUGO, show_host_busy, NULL);
354
f7120a4f 355static struct attribute *scsi_sysfs_shost_attrs[] = {
d285203c 356 &dev_attr_use_blk_mq.attr,
f7120a4f
HR
357 &dev_attr_unique_id.attr,
358 &dev_attr_host_busy.attr,
359 &dev_attr_cmd_per_lun.attr,
360 &dev_attr_can_queue.attr,
361 &dev_attr_sg_tablesize.attr,
13f05c8d 362 &dev_attr_sg_prot_tablesize.attr,
f7120a4f
HR
363 &dev_attr_unchecked_isa_dma.attr,
364 &dev_attr_proc_name.attr,
365 &dev_attr_scan.attr,
366 &dev_attr_hstate.attr,
367 &dev_attr_supported_mode.attr,
368 &dev_attr_active_mode.attr,
4469f987
MP
369 &dev_attr_prot_capabilities.attr,
370 &dev_attr_prot_guard_type.attr,
29443691 371 &dev_attr_host_reset.attr,
b4562022 372 &dev_attr_eh_deadline.attr,
f7120a4f
HR
373 NULL
374};
375
376struct attribute_group scsi_shost_attr_group = {
377 .attrs = scsi_sysfs_shost_attrs,
378};
379
a4dbd674 380const struct attribute_group *scsi_sysfs_shost_attr_groups[] = {
f7120a4f 381 &scsi_shost_attr_group,
1da177e4
LT
382 NULL
383};
384
ee959b00 385static void scsi_device_cls_release(struct device *class_dev)
1da177e4
LT
386{
387 struct scsi_device *sdev;
388
389 sdev = class_to_sdev(class_dev);
390 put_device(&sdev->sdev_gendev);
391}
392
65f27f38 393static void scsi_device_dev_release_usercontext(struct work_struct *work)
1da177e4
LT
394{
395 struct scsi_device *sdev;
396 struct device *parent;
a341cd0f 397 struct list_head *this, *tmp;
1da177e4
LT
398 unsigned long flags;
399
65f27f38
DH
400 sdev = container_of(work, struct scsi_device, ew.work);
401
402 parent = sdev->sdev_gendev.parent;
1da177e4
LT
403
404 spin_lock_irqsave(sdev->host->host_lock, flags);
1da177e4
LT
405 list_del(&sdev->siblings);
406 list_del(&sdev->same_target_siblings);
407 list_del(&sdev->starved_entry);
408 spin_unlock_irqrestore(sdev->host->host_lock, flags);
409
a341cd0f
JG
410 cancel_work_sync(&sdev->event_work);
411
412 list_for_each_safe(this, tmp, &sdev->event_list) {
413 struct scsi_event *evt;
414
415 evt = list_entry(this, struct scsi_event, node);
416 list_del(&evt->node);
417 kfree(evt);
418 }
419
e73e079b 420 blk_put_queue(sdev->request_queue);
86cbfb56
JB
421 /* NULL queue means the device can't be used */
422 sdev->request_queue = NULL;
1da177e4 423
b3ae8780
HR
424 kfree(sdev->vpd_pg83);
425 kfree(sdev->vpd_pg80);
1da177e4
LT
426 kfree(sdev->inquiry);
427 kfree(sdev);
428
429 if (parent)
430 put_device(parent);
431}
432
65110b21
JB
433static void scsi_device_dev_release(struct device *dev)
434{
ffedb452 435 struct scsi_device *sdp = to_scsi_device(dev);
65f27f38 436 execute_in_process_context(scsi_device_dev_release_usercontext,
ffedb452 437 &sdp->ew);
65110b21
JB
438}
439
52c1da39 440static struct class sdev_class = {
1da177e4 441 .name = "scsi_device",
ee959b00 442 .dev_release = scsi_device_cls_release,
1da177e4
LT
443};
444
445/* all probing is done in the individual ->probe routines */
446static int scsi_bus_match(struct device *dev, struct device_driver *gendrv)
447{
b0ed4336
HR
448 struct scsi_device *sdp;
449
450 if (dev->type != &scsi_dev_type)
451 return 0;
452
453 sdp = to_scsi_device(dev);
1da177e4
LT
454 if (sdp->no_uld_attach)
455 return 0;
456 return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0;
457}
458
7eff2e7a 459static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
d7b8bcb0 460{
1f42ea7b
JB
461 struct scsi_device *sdev;
462
463 if (dev->type != &scsi_dev_type)
464 return 0;
465
466 sdev = to_scsi_device(dev);
d7b8bcb0 467
7eff2e7a 468 add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type);
d7b8bcb0
MT
469 return 0;
470}
471
1da177e4
LT
472struct bus_type scsi_bus_type = {
473 .name = "scsi",
474 .match = scsi_bus_match,
d7b8bcb0 475 .uevent = scsi_bus_uevent,
aa338601 476#ifdef CONFIG_PM
db5bd1e0 477 .pm = &scsi_bus_pm_ops,
e6da54d8 478#endif
1da177e4 479};
a6a8d9f8 480EXPORT_SYMBOL_GPL(scsi_bus_type);
1da177e4
LT
481
482int scsi_sysfs_register(void)
483{
484 int error;
485
486 error = bus_register(&scsi_bus_type);
487 if (!error) {
488 error = class_register(&sdev_class);
489 if (error)
490 bus_unregister(&scsi_bus_type);
491 }
492
493 return error;
494}
495
496void scsi_sysfs_unregister(void)
497{
498 class_unregister(&sdev_class);
499 bus_unregister(&scsi_bus_type);
500}
501
502/*
503 * sdev_show_function: macro to create an attr function that can be used to
504 * show a non-bit field.
505 */
506#define sdev_show_function(field, format_string) \
507static ssize_t \
ee959b00
TJ
508sdev_show_##field (struct device *dev, struct device_attribute *attr, \
509 char *buf) \
1da177e4
LT
510{ \
511 struct scsi_device *sdev; \
512 sdev = to_scsi_device(dev); \
513 return snprintf (buf, 20, format_string, sdev->field); \
514} \
515
516/*
517 * sdev_rd_attr: macro to create a function and attribute variable for a
518 * read only field.
519 */
520#define sdev_rd_attr(field, format_string) \
521 sdev_show_function(field, format_string) \
522static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL);
523
524
525/*
160e7f67 526 * sdev_rw_attr: create a function and attribute variable for a
1da177e4
LT
527 * read/write field.
528 */
529#define sdev_rw_attr(field, format_string) \
530 sdev_show_function(field, format_string) \
531 \
532static ssize_t \
ee959b00
TJ
533sdev_store_##field (struct device *dev, struct device_attribute *attr, \
534 const char *buf, size_t count) \
1da177e4
LT
535{ \
536 struct scsi_device *sdev; \
537 sdev = to_scsi_device(dev); \
160e7f67 538 sscanf (buf, format_string, &sdev->field); \
1da177e4
LT
539 return count; \
540} \
541static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
542
543/* Currently we don't export bit fields, but we might in future,
544 * so leave this code in */
545#if 0
546/*
547 * sdev_rd_attr: create a function and attribute variable for a
548 * read/write bit field.
549 */
550#define sdev_rw_attr_bit(field) \
551 sdev_show_function(field, "%d\n") \
552 \
553static ssize_t \
ee959b00
TJ
554sdev_store_##field (struct device *dev, struct device_attribute *attr, \
555 const char *buf, size_t count) \
1da177e4
LT
556{ \
557 int ret; \
558 struct scsi_device *sdev; \
559 ret = scsi_sdev_check_buf_bit(buf); \
560 if (ret >= 0) { \
561 sdev = to_scsi_device(dev); \
562 sdev->field = ret; \
563 ret = count; \
564 } \
565 return ret; \
566} \
567static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
568
569/*
570 * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1",
571 * else return -EINVAL.
572 */
573static int scsi_sdev_check_buf_bit(const char *buf)
574{
575 if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
576 if (buf[0] == '1')
577 return 1;
578 else if (buf[0] == '0')
579 return 0;
580 else
581 return -EINVAL;
582 } else
583 return -EINVAL;
584}
585#endif
586/*
587 * Create the actual show/store functions and data structures.
588 */
1da177e4
LT
589sdev_rd_attr (type, "%d\n");
590sdev_rd_attr (scsi_level, "%d\n");
591sdev_rd_attr (vendor, "%.8s\n");
592sdev_rd_attr (model, "%.16s\n");
593sdev_rd_attr (rev, "%.4s\n");
594
71e75c97
CH
595static ssize_t
596sdev_show_device_busy(struct device *dev, struct device_attribute *attr,
597 char *buf)
598{
599 struct scsi_device *sdev = to_scsi_device(dev);
600 return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_busy));
601}
602static DEVICE_ATTR(device_busy, S_IRUGO, sdev_show_device_busy, NULL);
603
cd9070c9
CH
604static ssize_t
605sdev_show_device_blocked(struct device *dev, struct device_attribute *attr,
606 char *buf)
607{
608 struct scsi_device *sdev = to_scsi_device(dev);
609 return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_blocked));
610}
611static DEVICE_ATTR(device_blocked, S_IRUGO, sdev_show_device_blocked, NULL);
612
242f9dcb
JA
613/*
614 * TODO: can we make these symlinks to the block layer ones?
615 */
1da177e4 616static ssize_t
10523b3b 617sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT
618{
619 struct scsi_device *sdev;
620 sdev = to_scsi_device(dev);
242f9dcb 621 return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ);
1da177e4
LT
622}
623
624static ssize_t
ee959b00
TJ
625sdev_store_timeout (struct device *dev, struct device_attribute *attr,
626 const char *buf, size_t count)
1da177e4
LT
627{
628 struct scsi_device *sdev;
629 int timeout;
630 sdev = to_scsi_device(dev);
631 sscanf (buf, "%d\n", &timeout);
242f9dcb 632 blk_queue_rq_timeout(sdev->request_queue, timeout * HZ);
1da177e4
LT
633 return count;
634}
635static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout);
636
0816c925
MP
637static ssize_t
638sdev_show_eh_timeout(struct device *dev, struct device_attribute *attr, char *buf)
639{
640 struct scsi_device *sdev;
641 sdev = to_scsi_device(dev);
642 return snprintf(buf, 20, "%u\n", sdev->eh_timeout / HZ);
643}
644
645static ssize_t
646sdev_store_eh_timeout(struct device *dev, struct device_attribute *attr,
647 const char *buf, size_t count)
648{
649 struct scsi_device *sdev;
650 unsigned int eh_timeout;
651 int err;
652
653 if (!capable(CAP_SYS_ADMIN))
654 return -EACCES;
655
656 sdev = to_scsi_device(dev);
657 err = kstrtouint(buf, 10, &eh_timeout);
658 if (err)
659 return err;
660 sdev->eh_timeout = eh_timeout * HZ;
661
662 return count;
663}
664static DEVICE_ATTR(eh_timeout, S_IRUGO | S_IWUSR, sdev_show_eh_timeout, sdev_store_eh_timeout);
665
1da177e4 666static ssize_t
ee959b00
TJ
667store_rescan_field (struct device *dev, struct device_attribute *attr,
668 const char *buf, size_t count)
1da177e4
LT
669{
670 scsi_rescan_device(dev);
671 return count;
672}
673static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field);
674
ee959b00
TJ
675static ssize_t
676sdev_store_delete(struct device *dev, struct device_attribute *attr,
677 const char *buf, size_t count)
1da177e4 678{
ac0ece91
TH
679 if (device_remove_file_self(dev, attr))
680 scsi_remove_device(to_scsi_device(dev));
1da177e4
LT
681 return count;
682};
683static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete);
684
685static ssize_t
ee959b00
TJ
686store_state_field(struct device *dev, struct device_attribute *attr,
687 const char *buf, size_t count)
1da177e4
LT
688{
689 int i;
690 struct scsi_device *sdev = to_scsi_device(dev);
691 enum scsi_device_state state = 0;
692
6391a113 693 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
1da177e4
LT
694 const int len = strlen(sdev_states[i].name);
695 if (strncmp(sdev_states[i].name, buf, len) == 0 &&
696 buf[len] == '\n') {
697 state = sdev_states[i].value;
698 break;
699 }
700 }
701 if (!state)
702 return -EINVAL;
703
704 if (scsi_device_set_state(sdev, state))
705 return -EINVAL;
706 return count;
707}
708
709static ssize_t
10523b3b 710show_state_field(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT
711{
712 struct scsi_device *sdev = to_scsi_device(dev);
713 const char *name = scsi_device_state_name(sdev->sdev_state);
714
715 if (!name)
716 return -EINVAL;
717
718 return snprintf(buf, 20, "%s\n", name);
719}
720
721static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field);
722
723static ssize_t
ee959b00
TJ
724show_queue_type_field(struct device *dev, struct device_attribute *attr,
725 char *buf)
1da177e4
LT
726{
727 struct scsi_device *sdev = to_scsi_device(dev);
728 const char *name = "none";
729
609aa22f 730 if (sdev->simple_tags)
1da177e4
LT
731 name = "simple";
732
733 return snprintf(buf, 20, "%s\n", name);
734}
735
276b20d0
HR
736static ssize_t
737store_queue_type_field(struct device *dev, struct device_attribute *attr,
738 const char *buf, size_t count)
739{
740 struct scsi_device *sdev = to_scsi_device(dev);
276b20d0 741
efc3c1df 742 if (!sdev->tagged_supported)
276b20d0 743 return -EINVAL;
efc3c1df
CH
744
745 sdev_printk(KERN_INFO, sdev,
746 "ignoring write to deprecated queue_type attribute");
276b20d0
HR
747 return count;
748}
749
750static DEVICE_ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field,
751 store_queue_type_field);
1da177e4 752
b3ae8780
HR
753#define sdev_vpd_pg_attr(_page) \
754static ssize_t \
755show_vpd_##_page(struct file *filp, struct kobject *kobj, \
756 struct bin_attribute *bin_attr, \
757 char *buf, loff_t off, size_t count) \
758{ \
759 struct device *dev = container_of(kobj, struct device, kobj); \
760 struct scsi_device *sdev = to_scsi_device(dev); \
761 if (!sdev->vpd_##_page) \
762 return -EINVAL; \
763 return memory_read_from_buffer(buf, count, &off, \
764 sdev->vpd_##_page, \
765 sdev->vpd_##_page##_len); \
766} \
767static struct bin_attribute dev_attr_vpd_##_page = { \
768 .attr = {.name = __stringify(vpd_##_page), .mode = S_IRUGO }, \
769 .size = 0, \
770 .read = show_vpd_##_page, \
771};
772
773sdev_vpd_pg_attr(pg83);
774sdev_vpd_pg_attr(pg80);
1da177e4
LT
775
776static ssize_t
b3ae8780
HR
777show_iostat_counterbits(struct device *dev, struct device_attribute *attr,
778 char *buf)
1da177e4
LT
779{
780 return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8);
781}
782
783static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL);
784
785#define show_sdev_iostat(field) \
786static ssize_t \
ee959b00
TJ
787show_iostat_##field(struct device *dev, struct device_attribute *attr, \
788 char *buf) \
1da177e4
LT
789{ \
790 struct scsi_device *sdev = to_scsi_device(dev); \
791 unsigned long long count = atomic_read(&sdev->field); \
792 return snprintf(buf, 20, "0x%llx\n", count); \
793} \
794static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL)
795
796show_sdev_iostat(iorequest_cnt);
797show_sdev_iostat(iodone_cnt);
798show_sdev_iostat(ioerr_cnt);
799
d7b8bcb0
MT
800static ssize_t
801sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
802{
803 struct scsi_device *sdev;
804 sdev = to_scsi_device(dev);
805 return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type);
806}
807static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL);
1da177e4 808
a341cd0f
JG
809#define DECLARE_EVT_SHOW(name, Cap_name) \
810static ssize_t \
811sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \
ee959b00 812 char *buf) \
a341cd0f
JG
813{ \
814 struct scsi_device *sdev = to_scsi_device(dev); \
815 int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\
816 return snprintf(buf, 20, "%d\n", val); \
817}
818
819#define DECLARE_EVT_STORE(name, Cap_name) \
820static ssize_t \
ee959b00 821sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\
a341cd0f
JG
822 const char *buf, size_t count) \
823{ \
824 struct scsi_device *sdev = to_scsi_device(dev); \
825 int val = simple_strtoul(buf, NULL, 0); \
826 if (val == 0) \
827 clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
828 else if (val == 1) \
829 set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
830 else \
831 return -EINVAL; \
832 return count; \
833}
834
835#define DECLARE_EVT(name, Cap_name) \
836 DECLARE_EVT_SHOW(name, Cap_name) \
837 DECLARE_EVT_STORE(name, Cap_name) \
838 static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \
839 sdev_store_evt_##name);
840#define REF_EVT(name) &dev_attr_evt_##name.attr
841
842DECLARE_EVT(media_change, MEDIA_CHANGE)
279afdfe
EM
843DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED)
844DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED)
845DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED)
846DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED)
847DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED)
a341cd0f 848
ee959b00 849static ssize_t
276b20d0
HR
850sdev_store_queue_depth(struct device *dev, struct device_attribute *attr,
851 const char *buf, size_t count)
1da177e4
LT
852{
853 int depth, retval;
854 struct scsi_device *sdev = to_scsi_device(dev);
855 struct scsi_host_template *sht = sdev->host->hostt;
856
857 if (!sht->change_queue_depth)
858 return -EINVAL;
859
860 depth = simple_strtoul(buf, NULL, 0);
861
1278dd68 862 if (depth < 1 || depth > sdev->host->can_queue)
1da177e4
LT
863 return -EINVAL;
864
db5ed4df 865 retval = sht->change_queue_depth(sdev, depth);
1da177e4
LT
866 if (retval < 0)
867 return retval;
868
4a84067d
VD
869 sdev->max_queue_depth = sdev->queue_depth;
870
1da177e4
LT
871 return count;
872}
276b20d0 873sdev_show_function(queue_depth, "%d\n");
1da177e4 874
276b20d0
HR
875static DEVICE_ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth,
876 sdev_store_queue_depth);
1da177e4 877
4a84067d
VD
878static ssize_t
879sdev_show_queue_ramp_up_period(struct device *dev,
880 struct device_attribute *attr,
881 char *buf)
882{
883 struct scsi_device *sdev;
884 sdev = to_scsi_device(dev);
885 return snprintf(buf, 20, "%u\n",
886 jiffies_to_msecs(sdev->queue_ramp_up_period));
887}
888
889static ssize_t
890sdev_store_queue_ramp_up_period(struct device *dev,
891 struct device_attribute *attr,
892 const char *buf, size_t count)
893{
894 struct scsi_device *sdev = to_scsi_device(dev);
f7c65af5 895 unsigned int period;
4a84067d 896
f7c65af5 897 if (kstrtouint(buf, 10, &period))
4a84067d
VD
898 return -EINVAL;
899
900 sdev->queue_ramp_up_period = msecs_to_jiffies(period);
901 return period;
902}
903
276b20d0
HR
904static DEVICE_ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR,
905 sdev_show_queue_ramp_up_period,
906 sdev_store_queue_ramp_up_period);
4a84067d 907
276b20d0
HR
908static umode_t scsi_sdev_attr_is_visible(struct kobject *kobj,
909 struct attribute *attr, int i)
1da177e4 910{
276b20d0 911 struct device *dev = container_of(kobj, struct device, kobj);
1da177e4 912 struct scsi_device *sdev = to_scsi_device(dev);
1da177e4 913
1da177e4 914
276b20d0
HR
915 if (attr == &dev_attr_queue_depth.attr &&
916 !sdev->host->hostt->change_queue_depth)
917 return S_IRUGO;
1da177e4 918
276b20d0
HR
919 if (attr == &dev_attr_queue_ramp_up_period.attr &&
920 !sdev->host->hostt->change_queue_depth)
921 return 0;
1da177e4 922
276b20d0 923 return attr->mode;
1da177e4
LT
924}
925
276b20d0
HR
926/* Default template for device attributes. May NOT be modified */
927static struct attribute *scsi_sdev_attrs[] = {
928 &dev_attr_device_blocked.attr,
929 &dev_attr_type.attr,
930 &dev_attr_scsi_level.attr,
931 &dev_attr_device_busy.attr,
932 &dev_attr_vendor.attr,
933 &dev_attr_model.attr,
934 &dev_attr_rev.attr,
935 &dev_attr_rescan.attr,
936 &dev_attr_delete.attr,
937 &dev_attr_state.attr,
938 &dev_attr_timeout.attr,
939 &dev_attr_eh_timeout.attr,
940 &dev_attr_iocounterbits.attr,
941 &dev_attr_iorequest_cnt.attr,
942 &dev_attr_iodone_cnt.attr,
943 &dev_attr_ioerr_cnt.attr,
944 &dev_attr_modalias.attr,
945 &dev_attr_queue_depth.attr,
946 &dev_attr_queue_type.attr,
947 &dev_attr_queue_ramp_up_period.attr,
948 REF_EVT(media_change),
949 REF_EVT(inquiry_change_reported),
950 REF_EVT(capacity_change_reported),
951 REF_EVT(soft_threshold_reached),
952 REF_EVT(mode_parameter_change_reported),
953 REF_EVT(lun_change_reported),
954 NULL
955};
956
b3ae8780
HR
957static struct bin_attribute *scsi_sdev_bin_attrs[] = {
958 &dev_attr_vpd_pg83,
959 &dev_attr_vpd_pg80,
960 NULL
961};
276b20d0
HR
962static struct attribute_group scsi_sdev_attr_group = {
963 .attrs = scsi_sdev_attrs,
b3ae8780 964 .bin_attrs = scsi_sdev_bin_attrs,
276b20d0
HR
965 .is_visible = scsi_sdev_attr_is_visible,
966};
967
968static const struct attribute_group *scsi_sdev_attr_groups[] = {
969 &scsi_sdev_attr_group,
970 NULL
971};
972
643eb2d9
JB
973static int scsi_target_add(struct scsi_target *starget)
974{
975 int error;
976
977 if (starget->state != STARGET_CREATED)
978 return 0;
979
980 error = device_add(&starget->dev);
981 if (error) {
982 dev_err(&starget->dev, "target device_add failed, error %d\n", error);
643eb2d9
JB
983 return error;
984 }
985 transport_add_device(&starget->dev);
986 starget->state = STARGET_RUNNING;
987
bc4f2401
AS
988 pm_runtime_set_active(&starget->dev);
989 pm_runtime_enable(&starget->dev);
990 device_enable_async_suspend(&starget->dev);
991
643eb2d9
JB
992 return 0;
993}
994
1da177e4
LT
995/**
996 * scsi_sysfs_add_sdev - add scsi device to sysfs
997 * @sdev: scsi_device to add
998 *
999 * Return value:
1000 * 0 on Success / non-zero on Failure
1001 **/
1002int scsi_sysfs_add_sdev(struct scsi_device *sdev)
1003{
1004 int error, i;
80ed71ce 1005 struct request_queue *rq = sdev->request_queue;
643eb2d9 1006 struct scsi_target *starget = sdev->sdev_target;
1da177e4 1007
ee37e09d
AS
1008 error = scsi_device_set_state(sdev, SDEV_RUNNING);
1009 if (error)
1da177e4
LT
1010 return error;
1011
643eb2d9
JB
1012 error = scsi_target_add(starget);
1013 if (error)
1014 return error;
1015
1016 transport_configure_device(&starget->dev);
bc4f2401 1017
4cb077d9 1018 device_enable_async_suspend(&sdev->sdev_gendev);
bc4f2401
AS
1019 scsi_autopm_get_target(starget);
1020 pm_runtime_set_active(&sdev->sdev_gendev);
1021 pm_runtime_forbid(&sdev->sdev_gendev);
1022 pm_runtime_enable(&sdev->sdev_gendev);
1023 scsi_autopm_put_target(starget);
1024
bc4f2401
AS
1025 scsi_autopm_get_device(sdev);
1026
1da177e4
LT
1027 error = device_add(&sdev->sdev_gendev);
1028 if (error) {
73d8c34f
AS
1029 sdev_printk(KERN_INFO, sdev,
1030 "failed to add device: %d\n", error);
ee37e09d 1031 return error;
1da177e4 1032 }
4cb077d9 1033 device_enable_async_suspend(&sdev->sdev_dev);
ee959b00 1034 error = device_add(&sdev->sdev_dev);
1da177e4 1035 if (error) {
73d8c34f
AS
1036 sdev_printk(KERN_INFO, sdev,
1037 "failed to add class device: %d\n", error);
860dc736 1038 device_del(&sdev->sdev_gendev);
ee37e09d 1039 return error;
1da177e4 1040 }
860dc736
JB
1041 transport_add_device(&sdev->sdev_gendev);
1042 sdev->is_visible = 1;
1da177e4 1043
97f46ae4 1044 error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL);
80ed71ce
JB
1045
1046 if (error)
860dc736
JB
1047 /* we're treating error on bsg register as non-fatal,
1048 * so pretend nothing went wrong */
80ed71ce
JB
1049 sdev_printk(KERN_INFO, sdev,
1050 "Failed to register bsg queue, errno=%d\n", error);
1051
bfd12944 1052 /* add additional host specific attributes */
1da177e4
LT
1053 if (sdev->host->hostt->sdev_attrs) {
1054 for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) {
bfd12944 1055 error = device_create_file(&sdev->sdev_gendev,
1da177e4 1056 sdev->host->hostt->sdev_attrs[i]);
860dc736 1057 if (error)
ee37e09d 1058 return error;
1da177e4
LT
1059 }
1060 }
1da177e4 1061
6fe8c1db 1062 scsi_autopm_put_device(sdev);
1da177e4
LT
1063 return error;
1064}
1065
903f4fed 1066void __scsi_remove_device(struct scsi_device *sdev)
1da177e4 1067{
df133c21
JB
1068 struct device *dev = &sdev->sdev_gendev;
1069
860dc736
JB
1070 if (sdev->is_visible) {
1071 if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0)
1072 return;
1da177e4 1073
860dc736
JB
1074 bsg_unregister_queue(sdev->request_queue);
1075 device_unregister(&sdev->sdev_dev);
1076 transport_remove_device(dev);
1077 device_del(dev);
1078 } else
1079 put_device(&sdev->sdev_dev);
b485462a
BVA
1080
1081 /*
1082 * Stop accepting new requests and wait until all queuecommand() and
1083 * scsi_run_queue() invocations have finished before tearing down the
1084 * device.
1085 */
1da177e4 1086 scsi_device_set_state(sdev, SDEV_DEL);
b485462a
BVA
1087 blk_cleanup_queue(sdev->request_queue);
1088 cancel_work_sync(&sdev->requeue_work);
1089
1da177e4
LT
1090 if (sdev->host->hostt->slave_destroy)
1091 sdev->host->hostt->slave_destroy(sdev);
df133c21 1092 transport_destroy_device(dev);
86cbfb56 1093
e63ed0d7
JB
1094 /*
1095 * Paired with the kref_get() in scsi_sysfs_initialize(). We have
1096 * remoed sysfs visibility from the device, so make the target
1097 * invisible if this was the last device underneath it.
1098 */
1099 scsi_target_reap(scsi_target(sdev));
1100
df133c21 1101 put_device(dev);
903f4fed
AS
1102}
1103
1104/**
1105 * scsi_remove_device - unregister a device from the scsi bus
1106 * @sdev: scsi_device to unregister
1107 **/
1108void scsi_remove_device(struct scsi_device *sdev)
1109{
54195002
AS
1110 struct Scsi_Host *shost = sdev->host;
1111
0b950672 1112 mutex_lock(&shost->scan_mutex);
903f4fed 1113 __scsi_remove_device(sdev);
0b950672 1114 mutex_unlock(&shost->scan_mutex);
1da177e4
LT
1115}
1116EXPORT_SYMBOL(scsi_remove_device);
1117
44818efb 1118static void __scsi_remove_target(struct scsi_target *starget)
1da177e4
LT
1119{
1120 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1121 unsigned long flags;
a64358db 1122 struct scsi_device *sdev;
1da177e4
LT
1123
1124 spin_lock_irqsave(shost->host_lock, flags);
a64358db
AS
1125 restart:
1126 list_for_each_entry(sdev, &shost->__devices, siblings) {
1da177e4 1127 if (sdev->channel != starget->channel ||
a64358db 1128 sdev->id != starget->id ||
546ae796 1129 scsi_device_get(sdev))
1da177e4
LT
1130 continue;
1131 spin_unlock_irqrestore(shost->host_lock, flags);
1132 scsi_remove_device(sdev);
546ae796 1133 scsi_device_put(sdev);
1da177e4 1134 spin_lock_irqsave(shost->host_lock, flags);
a64358db 1135 goto restart;
1da177e4
LT
1136 }
1137 spin_unlock_irqrestore(shost->host_lock, flags);
20b1e674 1138}
1139
1da177e4
LT
1140/**
1141 * scsi_remove_target - try to remove a target and all its devices
1142 * @dev: generic starget or parent of generic stargets to be removed
1143 *
1144 * Note: This is slightly racy. It is possible that if the user
1145 * requests the addition of another device then the target won't be
1146 * removed.
1147 */
1148void scsi_remove_target(struct device *dev)
1149{
3b661a92 1150 struct Scsi_Host *shost = dev_to_shost(dev->parent);
bc3f02a7 1151 struct scsi_target *starget, *last = NULL;
3b661a92
DW
1152 unsigned long flags;
1153
bc3f02a7
DW
1154 /* remove targets being careful to lookup next entry before
1155 * deleting the last
1156 */
3b661a92
DW
1157 spin_lock_irqsave(shost->host_lock, flags);
1158 list_for_each_entry(starget, &shost->__targets, siblings) {
1159 if (starget->state == STARGET_DEL)
1160 continue;
1161 if (starget->dev.parent == dev || &starget->dev == dev) {
bc3f02a7 1162 /* assuming new targets arrive at the end */
e63ed0d7 1163 kref_get(&starget->reap_ref);
bc3f02a7
DW
1164 spin_unlock_irqrestore(shost->host_lock, flags);
1165 if (last)
1166 scsi_target_reap(last);
1167 last = starget;
1168 __scsi_remove_target(starget);
1169 spin_lock_irqsave(shost->host_lock, flags);
3b661a92 1170 }
1da177e4 1171 }
3b661a92 1172 spin_unlock_irqrestore(shost->host_lock, flags);
1da177e4 1173
bc3f02a7
DW
1174 if (last)
1175 scsi_target_reap(last);
1da177e4
LT
1176}
1177EXPORT_SYMBOL(scsi_remove_target);
1178
1179int scsi_register_driver(struct device_driver *drv)
1180{
1181 drv->bus = &scsi_bus_type;
1182
1183 return driver_register(drv);
1184}
1185EXPORT_SYMBOL(scsi_register_driver);
1186
1187int scsi_register_interface(struct class_interface *intf)
1188{
1189 intf->class = &sdev_class;
1190
1191 return class_interface_register(intf);
1192}
1193EXPORT_SYMBOL(scsi_register_interface);
1194
1da177e4
LT
1195/**
1196 * scsi_sysfs_add_host - add scsi host to subsystem
1197 * @shost: scsi host struct to add to subsystem
1da177e4
LT
1198 **/
1199int scsi_sysfs_add_host(struct Scsi_Host *shost)
1200{
1201 int error, i;
1202
f7120a4f 1203 /* add host specific attributes */
1da177e4
LT
1204 if (shost->hostt->shost_attrs) {
1205 for (i = 0; shost->hostt->shost_attrs[i]; i++) {
ee959b00 1206 error = device_create_file(&shost->shost_dev,
f7120a4f 1207 shost->hostt->shost_attrs[i]);
1da177e4
LT
1208 if (error)
1209 return error;
1210 }
1211 }
1212
1213 transport_register_device(&shost->shost_gendev);
d52b3815 1214 transport_configure_device(&shost->shost_gendev);
1da177e4
LT
1215 return 0;
1216}
1217
bfd12944
KS
1218static struct device_type scsi_dev_type = {
1219 .name = "scsi_device",
1220 .release = scsi_device_dev_release,
1221 .groups = scsi_sdev_attr_groups,
1222};
1223
1da177e4
LT
1224void scsi_sysfs_device_initialize(struct scsi_device *sdev)
1225{
1226 unsigned long flags;
1227 struct Scsi_Host *shost = sdev->host;
1228 struct scsi_target *starget = sdev->sdev_target;
1229
1230 device_initialize(&sdev->sdev_gendev);
1231 sdev->sdev_gendev.bus = &scsi_bus_type;
bfd12944 1232 sdev->sdev_gendev.type = &scsi_dev_type;
9cb78c16 1233 dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%llu",
71610f55
KS
1234 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1235
ee959b00 1236 device_initialize(&sdev->sdev_dev);
37e6ba00 1237 sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev);
ee959b00 1238 sdev->sdev_dev.class = &sdev_class;
9cb78c16 1239 dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%llu",
71610f55 1240 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
50c4e964
AS
1241 /*
1242 * Get a default scsi_level from the target (derived from sibling
1243 * devices). This is the best we can do for guessing how to set
1244 * sdev->lun_in_cdb for the initial INQUIRY command. For LUN 0 the
1245 * setting doesn't matter, because all the bits are zero anyway.
1246 * But it does matter for higher LUNs.
1247 */
7c9d6f16 1248 sdev->scsi_level = starget->scsi_level;
50c4e964
AS
1249 if (sdev->scsi_level <= SCSI_2 &&
1250 sdev->scsi_level != SCSI_UNKNOWN &&
1251 !shost->no_scsi2_lun_in_cdb)
1252 sdev->lun_in_cdb = 1;
1253
1da177e4
LT
1254 transport_setup_device(&sdev->sdev_gendev);
1255 spin_lock_irqsave(shost->host_lock, flags);
1256 list_add_tail(&sdev->same_target_siblings, &starget->devices);
1257 list_add_tail(&sdev->siblings, &shost->__devices);
1258 spin_unlock_irqrestore(shost->host_lock, flags);
e63ed0d7
JB
1259 /*
1260 * device can now only be removed via __scsi_remove_device() so hold
1261 * the target. Target will be held in CREATED state until something
1262 * beneath it becomes visible (in which case it moves to RUNNING)
1263 */
1264 kref_get(&starget->reap_ref);
1da177e4
LT
1265}
1266
1267int scsi_is_sdev_device(const struct device *dev)
1268{
13ba9bcb 1269 return dev->type == &scsi_dev_type;
1da177e4
LT
1270}
1271EXPORT_SYMBOL(scsi_is_sdev_device);
1272
1273/* A blank transport template that is used in drivers that don't
1274 * yet implement Transport Attributes */
1275struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, };