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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
9#include <linux/module.h>
10#include <linux/slab.h>
11#include <linux/init.h>
12#include <linux/blkdev.h>
13#include <linux/device.h>
14#include <linux/pm_runtime.h>
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>
21#include <scsi/scsi_driver.h>
22
23#include "scsi_priv.h"
24#include "scsi_logging.h"
25
26static struct device_type scsi_dev_type;
27
28static const struct {
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" },
38 { SDEV_BLOCK, "blocked" },
39 { SDEV_CREATED_BLOCK, "created-blocked" },
40};
41
42const char *scsi_device_state_name(enum scsi_device_state state)
43{
44 int i;
45 char *name = NULL;
46
47 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
48 if (sdev_states[i].value == state) {
49 name = sdev_states[i].name;
50 break;
51 }
52 }
53 return name;
54}
55
56static const struct {
57 enum scsi_host_state value;
58 char *name;
59} shost_states[] = {
60 { SHOST_CREATED, "created" },
61 { SHOST_RUNNING, "running" },
62 { SHOST_CANCEL, "cancel" },
63 { SHOST_DEL, "deleted" },
64 { SHOST_RECOVERY, "recovery" },
65 { SHOST_CANCEL_RECOVERY, "cancel/recovery" },
66 { SHOST_DEL_RECOVERY, "deleted/recovery", },
67};
68const char *scsi_host_state_name(enum scsi_host_state state)
69{
70 int i;
71 char *name = NULL;
72
73 for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
74 if (shost_states[i].value == state) {
75 name = shost_states[i].name;
76 break;
77 }
78 }
79 return name;
80}
81
82static int check_set(unsigned int *val, char *src)
83{
84 char *last;
85
86 if (strncmp(src, "-", 20) == 0) {
87 *val = SCAN_WILD_CARD;
88 } else {
89 /*
90 * Doesn't check for int overflow
91 */
92 *val = simple_strtoul(src, &last, 0);
93 if (*last != '\0')
94 return 1;
95 }
96 return 0;
97}
98
99static int scsi_scan(struct Scsi_Host *shost, const char *str)
100{
101 char s1[15], s2[15], s3[15], junk;
102 unsigned int channel, id, lun;
103 int res;
104
105 res = sscanf(str, "%10s %10s %10s %c", s1, s2, s3, &junk);
106 if (res != 3)
107 return -EINVAL;
108 if (check_set(&channel, s1))
109 return -EINVAL;
110 if (check_set(&id, s2))
111 return -EINVAL;
112 if (check_set(&lun, s3))
113 return -EINVAL;
114 if (shost->transportt->user_scan)
115 res = shost->transportt->user_scan(shost, channel, id, lun);
116 else
117 res = scsi_scan_host_selected(shost, channel, id, lun, 1);
118 return res;
119}
120
121/*
122 * shost_show_function: macro to create an attr function that can be used to
123 * show a non-bit field.
124 */
125#define shost_show_function(name, field, format_string) \
126static ssize_t \
127show_##name (struct device *dev, struct device_attribute *attr, \
128 char *buf) \
129{ \
130 struct Scsi_Host *shost = class_to_shost(dev); \
131 return snprintf (buf, 20, format_string, shost->field); \
132}
133
134/*
135 * shost_rd_attr: macro to create a function and attribute variable for a
136 * read only field.
137 */
138#define shost_rd_attr2(name, field, format_string) \
139 shost_show_function(name, field, format_string) \
140static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
141
142#define shost_rd_attr(field, format_string) \
143shost_rd_attr2(field, field, format_string)
144
145/*
146 * Create the actual show/store functions and data structures.
147 */
148
149static ssize_t
150store_scan(struct device *dev, struct device_attribute *attr,
151 const char *buf, size_t count)
152{
153 struct Scsi_Host *shost = class_to_shost(dev);
154 int res;
155
156 res = scsi_scan(shost, buf);
157 if (res == 0)
158 res = count;
159 return res;
160};
161static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan);
162
163static ssize_t
164store_shost_state(struct device *dev, struct device_attribute *attr,
165 const char *buf, size_t count)
166{
167 int i;
168 struct Scsi_Host *shost = class_to_shost(dev);
169 enum scsi_host_state state = 0;
170
171 for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
172 const int len = strlen(shost_states[i].name);
173 if (strncmp(shost_states[i].name, buf, len) == 0 &&
174 buf[len] == '\n') {
175 state = shost_states[i].value;
176 break;
177 }
178 }
179 if (!state)
180 return -EINVAL;
181
182 if (scsi_host_set_state(shost, state))
183 return -EINVAL;
184 return count;
185}
186
187static ssize_t
188show_shost_state(struct device *dev, struct device_attribute *attr, char *buf)
189{
190 struct Scsi_Host *shost = class_to_shost(dev);
191 const char *name = scsi_host_state_name(shost->shost_state);
192
193 if (!name)
194 return -EINVAL;
195
196 return snprintf(buf, 20, "%s\n", name);
197}
198
199/* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */
200struct device_attribute dev_attr_hstate =
201 __ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state);
202
203static ssize_t
204show_shost_mode(unsigned int mode, char *buf)
205{
206 ssize_t len = 0;
207
208 if (mode & MODE_INITIATOR)
209 len = sprintf(buf, "%s", "Initiator");
210
211 if (mode & MODE_TARGET)
212 len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target");
213
214 len += sprintf(buf + len, "\n");
215
216 return len;
217}
218
219static ssize_t
220show_shost_supported_mode(struct device *dev, struct device_attribute *attr,
221 char *buf)
222{
223 struct Scsi_Host *shost = class_to_shost(dev);
224 unsigned int supported_mode = shost->hostt->supported_mode;
225
226 if (supported_mode == MODE_UNKNOWN)
227 /* by default this should be initiator */
228 supported_mode = MODE_INITIATOR;
229
230 return show_shost_mode(supported_mode, buf);
231}
232
233static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL);
234
235static ssize_t
236show_shost_active_mode(struct device *dev,
237 struct device_attribute *attr, char *buf)
238{
239 struct Scsi_Host *shost = class_to_shost(dev);
240
241 if (shost->active_mode == MODE_UNKNOWN)
242 return snprintf(buf, 20, "unknown\n");
243 else
244 return show_shost_mode(shost->active_mode, buf);
245}
246
247static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL);
248
249shost_rd_attr(unique_id, "%u\n");
250shost_rd_attr(host_busy, "%hu\n");
251shost_rd_attr(cmd_per_lun, "%hd\n");
252shost_rd_attr(can_queue, "%hd\n");
253shost_rd_attr(sg_tablesize, "%hu\n");
254shost_rd_attr(sg_prot_tablesize, "%hu\n");
255shost_rd_attr(unchecked_isa_dma, "%d\n");
256shost_rd_attr(prot_capabilities, "%u\n");
257shost_rd_attr(prot_guard_type, "%hd\n");
258shost_rd_attr2(proc_name, hostt->proc_name, "%s\n");
259
260static struct attribute *scsi_sysfs_shost_attrs[] = {
261 &dev_attr_unique_id.attr,
262 &dev_attr_host_busy.attr,
263 &dev_attr_cmd_per_lun.attr,
264 &dev_attr_can_queue.attr,
265 &dev_attr_sg_tablesize.attr,
266 &dev_attr_sg_prot_tablesize.attr,
267 &dev_attr_unchecked_isa_dma.attr,
268 &dev_attr_proc_name.attr,
269 &dev_attr_scan.attr,
270 &dev_attr_hstate.attr,
271 &dev_attr_supported_mode.attr,
272 &dev_attr_active_mode.attr,
273 &dev_attr_prot_capabilities.attr,
274 &dev_attr_prot_guard_type.attr,
275 NULL
276};
277
278struct attribute_group scsi_shost_attr_group = {
279 .attrs = scsi_sysfs_shost_attrs,
280};
281
282const struct attribute_group *scsi_sysfs_shost_attr_groups[] = {
283 &scsi_shost_attr_group,
284 NULL
285};
286
287static void scsi_device_cls_release(struct device *class_dev)
288{
289 struct scsi_device *sdev;
290
291 sdev = class_to_sdev(class_dev);
292 put_device(&sdev->sdev_gendev);
293}
294
295static void scsi_device_dev_release_usercontext(struct work_struct *work)
296{
297 struct scsi_device *sdev;
298 struct device *parent;
299 struct scsi_target *starget;
300 struct list_head *this, *tmp;
301 unsigned long flags;
302
303 sdev = container_of(work, struct scsi_device, ew.work);
304
305 parent = sdev->sdev_gendev.parent;
306 starget = to_scsi_target(parent);
307
308 spin_lock_irqsave(sdev->host->host_lock, flags);
309 starget->reap_ref++;
310 list_del(&sdev->siblings);
311 list_del(&sdev->same_target_siblings);
312 list_del(&sdev->starved_entry);
313 spin_unlock_irqrestore(sdev->host->host_lock, flags);
314
315 cancel_work_sync(&sdev->event_work);
316
317 list_for_each_safe(this, tmp, &sdev->event_list) {
318 struct scsi_event *evt;
319
320 evt = list_entry(this, struct scsi_event, node);
321 list_del(&evt->node);
322 kfree(evt);
323 }
324
325 blk_put_queue(sdev->request_queue);
326 /* NULL queue means the device can't be used */
327 sdev->request_queue = NULL;
328
329 scsi_target_reap(scsi_target(sdev));
330
331 kfree(sdev->inquiry);
332 kfree(sdev);
333
334 if (parent)
335 put_device(parent);
336}
337
338static void scsi_device_dev_release(struct device *dev)
339{
340 struct scsi_device *sdp = to_scsi_device(dev);
341 execute_in_process_context(scsi_device_dev_release_usercontext,
342 &sdp->ew);
343}
344
345static struct class sdev_class = {
346 .name = "scsi_device",
347 .dev_release = scsi_device_cls_release,
348};
349
350/* all probing is done in the individual ->probe routines */
351static int scsi_bus_match(struct device *dev, struct device_driver *gendrv)
352{
353 struct scsi_device *sdp;
354
355 if (dev->type != &scsi_dev_type)
356 return 0;
357
358 sdp = to_scsi_device(dev);
359 if (sdp->no_uld_attach)
360 return 0;
361 return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0;
362}
363
364static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
365{
366 struct scsi_device *sdev;
367
368 if (dev->type != &scsi_dev_type)
369 return 0;
370
371 sdev = to_scsi_device(dev);
372
373 add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type);
374 return 0;
375}
376
377struct bus_type scsi_bus_type = {
378 .name = "scsi",
379 .match = scsi_bus_match,
380 .uevent = scsi_bus_uevent,
381#ifdef CONFIG_PM
382 .pm = &scsi_bus_pm_ops,
383#endif
384};
385EXPORT_SYMBOL_GPL(scsi_bus_type);
386
387int scsi_sysfs_register(void)
388{
389 int error;
390
391 error = bus_register(&scsi_bus_type);
392 if (!error) {
393 error = class_register(&sdev_class);
394 if (error)
395 bus_unregister(&scsi_bus_type);
396 }
397
398 return error;
399}
400
401void scsi_sysfs_unregister(void)
402{
403 class_unregister(&sdev_class);
404 bus_unregister(&scsi_bus_type);
405}
406
407/*
408 * sdev_show_function: macro to create an attr function that can be used to
409 * show a non-bit field.
410 */
411#define sdev_show_function(field, format_string) \
412static ssize_t \
413sdev_show_##field (struct device *dev, struct device_attribute *attr, \
414 char *buf) \
415{ \
416 struct scsi_device *sdev; \
417 sdev = to_scsi_device(dev); \
418 return snprintf (buf, 20, format_string, sdev->field); \
419} \
420
421/*
422 * sdev_rd_attr: macro to create a function and attribute variable for a
423 * read only field.
424 */
425#define sdev_rd_attr(field, format_string) \
426 sdev_show_function(field, format_string) \
427static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL);
428
429
430/*
431 * sdev_rw_attr: create a function and attribute variable for a
432 * read/write field.
433 */
434#define sdev_rw_attr(field, format_string) \
435 sdev_show_function(field, format_string) \
436 \
437static ssize_t \
438sdev_store_##field (struct device *dev, struct device_attribute *attr, \
439 const char *buf, size_t count) \
440{ \
441 struct scsi_device *sdev; \
442 sdev = to_scsi_device(dev); \
443 sscanf (buf, format_string, &sdev->field); \
444 return count; \
445} \
446static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
447
448/* Currently we don't export bit fields, but we might in future,
449 * so leave this code in */
450#if 0
451/*
452 * sdev_rd_attr: create a function and attribute variable for a
453 * read/write bit field.
454 */
455#define sdev_rw_attr_bit(field) \
456 sdev_show_function(field, "%d\n") \
457 \
458static ssize_t \
459sdev_store_##field (struct device *dev, struct device_attribute *attr, \
460 const char *buf, size_t count) \
461{ \
462 int ret; \
463 struct scsi_device *sdev; \
464 ret = scsi_sdev_check_buf_bit(buf); \
465 if (ret >= 0) { \
466 sdev = to_scsi_device(dev); \
467 sdev->field = ret; \
468 ret = count; \
469 } \
470 return ret; \
471} \
472static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
473
474/*
475 * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1",
476 * else return -EINVAL.
477 */
478static int scsi_sdev_check_buf_bit(const char *buf)
479{
480 if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
481 if (buf[0] == '1')
482 return 1;
483 else if (buf[0] == '0')
484 return 0;
485 else
486 return -EINVAL;
487 } else
488 return -EINVAL;
489}
490#endif
491/*
492 * Create the actual show/store functions and data structures.
493 */
494sdev_rd_attr (device_blocked, "%d\n");
495sdev_rd_attr (queue_depth, "%d\n");
496sdev_rd_attr (type, "%d\n");
497sdev_rd_attr (scsi_level, "%d\n");
498sdev_rd_attr (vendor, "%.8s\n");
499sdev_rd_attr (model, "%.16s\n");
500sdev_rd_attr (rev, "%.4s\n");
501
502/*
503 * TODO: can we make these symlinks to the block layer ones?
504 */
505static ssize_t
506sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf)
507{
508 struct scsi_device *sdev;
509 sdev = to_scsi_device(dev);
510 return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ);
511}
512
513static ssize_t
514sdev_store_timeout (struct device *dev, struct device_attribute *attr,
515 const char *buf, size_t count)
516{
517 struct scsi_device *sdev;
518 int timeout;
519 sdev = to_scsi_device(dev);
520 sscanf (buf, "%d\n", &timeout);
521 blk_queue_rq_timeout(sdev->request_queue, timeout * HZ);
522 return count;
523}
524static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout);
525
526static ssize_t
527store_rescan_field (struct device *dev, struct device_attribute *attr,
528 const char *buf, size_t count)
529{
530 scsi_rescan_device(dev);
531 return count;
532}
533static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field);
534
535static void sdev_store_delete_callback(struct device *dev)
536{
537 scsi_remove_device(to_scsi_device(dev));
538}
539
540static ssize_t
541sdev_store_delete(struct device *dev, struct device_attribute *attr,
542 const char *buf, size_t count)
543{
544 int rc;
545
546 /* An attribute cannot be unregistered by one of its own methods,
547 * so we have to use this roundabout approach.
548 */
549 rc = device_schedule_callback(dev, sdev_store_delete_callback);
550 if (rc)
551 count = rc;
552 return count;
553};
554static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete);
555
556static ssize_t
557store_state_field(struct device *dev, struct device_attribute *attr,
558 const char *buf, size_t count)
559{
560 int i;
561 struct scsi_device *sdev = to_scsi_device(dev);
562 enum scsi_device_state state = 0;
563
564 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
565 const int len = strlen(sdev_states[i].name);
566 if (strncmp(sdev_states[i].name, buf, len) == 0 &&
567 buf[len] == '\n') {
568 state = sdev_states[i].value;
569 break;
570 }
571 }
572 if (!state)
573 return -EINVAL;
574
575 if (scsi_device_set_state(sdev, state))
576 return -EINVAL;
577 return count;
578}
579
580static ssize_t
581show_state_field(struct device *dev, struct device_attribute *attr, char *buf)
582{
583 struct scsi_device *sdev = to_scsi_device(dev);
584 const char *name = scsi_device_state_name(sdev->sdev_state);
585
586 if (!name)
587 return -EINVAL;
588
589 return snprintf(buf, 20, "%s\n", name);
590}
591
592static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field);
593
594static ssize_t
595show_queue_type_field(struct device *dev, struct device_attribute *attr,
596 char *buf)
597{
598 struct scsi_device *sdev = to_scsi_device(dev);
599 const char *name = "none";
600
601 if (sdev->ordered_tags)
602 name = "ordered";
603 else if (sdev->simple_tags)
604 name = "simple";
605
606 return snprintf(buf, 20, "%s\n", name);
607}
608
609static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL);
610
611static ssize_t
612show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf)
613{
614 return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8);
615}
616
617static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL);
618
619#define show_sdev_iostat(field) \
620static ssize_t \
621show_iostat_##field(struct device *dev, struct device_attribute *attr, \
622 char *buf) \
623{ \
624 struct scsi_device *sdev = to_scsi_device(dev); \
625 unsigned long long count = atomic_read(&sdev->field); \
626 return snprintf(buf, 20, "0x%llx\n", count); \
627} \
628static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL)
629
630show_sdev_iostat(iorequest_cnt);
631show_sdev_iostat(iodone_cnt);
632show_sdev_iostat(ioerr_cnt);
633
634static ssize_t
635sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
636{
637 struct scsi_device *sdev;
638 sdev = to_scsi_device(dev);
639 return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type);
640}
641static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL);
642
643#define DECLARE_EVT_SHOW(name, Cap_name) \
644static ssize_t \
645sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \
646 char *buf) \
647{ \
648 struct scsi_device *sdev = to_scsi_device(dev); \
649 int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\
650 return snprintf(buf, 20, "%d\n", val); \
651}
652
653#define DECLARE_EVT_STORE(name, Cap_name) \
654static ssize_t \
655sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\
656 const char *buf, size_t count) \
657{ \
658 struct scsi_device *sdev = to_scsi_device(dev); \
659 int val = simple_strtoul(buf, NULL, 0); \
660 if (val == 0) \
661 clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
662 else if (val == 1) \
663 set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
664 else \
665 return -EINVAL; \
666 return count; \
667}
668
669#define DECLARE_EVT(name, Cap_name) \
670 DECLARE_EVT_SHOW(name, Cap_name) \
671 DECLARE_EVT_STORE(name, Cap_name) \
672 static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \
673 sdev_store_evt_##name);
674#define REF_EVT(name) &dev_attr_evt_##name.attr
675
676DECLARE_EVT(media_change, MEDIA_CHANGE)
677
678/* Default template for device attributes. May NOT be modified */
679static struct attribute *scsi_sdev_attrs[] = {
680 &dev_attr_device_blocked.attr,
681 &dev_attr_type.attr,
682 &dev_attr_scsi_level.attr,
683 &dev_attr_vendor.attr,
684 &dev_attr_model.attr,
685 &dev_attr_rev.attr,
686 &dev_attr_rescan.attr,
687 &dev_attr_delete.attr,
688 &dev_attr_state.attr,
689 &dev_attr_timeout.attr,
690 &dev_attr_iocounterbits.attr,
691 &dev_attr_iorequest_cnt.attr,
692 &dev_attr_iodone_cnt.attr,
693 &dev_attr_ioerr_cnt.attr,
694 &dev_attr_modalias.attr,
695 REF_EVT(media_change),
696 NULL
697};
698
699static struct attribute_group scsi_sdev_attr_group = {
700 .attrs = scsi_sdev_attrs,
701};
702
703static const struct attribute_group *scsi_sdev_attr_groups[] = {
704 &scsi_sdev_attr_group,
705 NULL
706};
707
708static ssize_t
709sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr,
710 const char *buf, size_t count)
711{
712 int depth, retval;
713 struct scsi_device *sdev = to_scsi_device(dev);
714 struct scsi_host_template *sht = sdev->host->hostt;
715
716 if (!sht->change_queue_depth)
717 return -EINVAL;
718
719 depth = simple_strtoul(buf, NULL, 0);
720
721 if (depth < 1)
722 return -EINVAL;
723
724 retval = sht->change_queue_depth(sdev, depth,
725 SCSI_QDEPTH_DEFAULT);
726 if (retval < 0)
727 return retval;
728
729 sdev->max_queue_depth = sdev->queue_depth;
730
731 return count;
732}
733
734static struct device_attribute sdev_attr_queue_depth_rw =
735 __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth,
736 sdev_store_queue_depth_rw);
737
738static ssize_t
739sdev_show_queue_ramp_up_period(struct device *dev,
740 struct device_attribute *attr,
741 char *buf)
742{
743 struct scsi_device *sdev;
744 sdev = to_scsi_device(dev);
745 return snprintf(buf, 20, "%u\n",
746 jiffies_to_msecs(sdev->queue_ramp_up_period));
747}
748
749static ssize_t
750sdev_store_queue_ramp_up_period(struct device *dev,
751 struct device_attribute *attr,
752 const char *buf, size_t count)
753{
754 struct scsi_device *sdev = to_scsi_device(dev);
755 unsigned long period;
756
757 if (strict_strtoul(buf, 10, &period))
758 return -EINVAL;
759
760 sdev->queue_ramp_up_period = msecs_to_jiffies(period);
761 return period;
762}
763
764static struct device_attribute sdev_attr_queue_ramp_up_period =
765 __ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR,
766 sdev_show_queue_ramp_up_period,
767 sdev_store_queue_ramp_up_period);
768
769static ssize_t
770sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr,
771 const char *buf, size_t count)
772{
773 struct scsi_device *sdev = to_scsi_device(dev);
774 struct scsi_host_template *sht = sdev->host->hostt;
775 int tag_type = 0, retval;
776 int prev_tag_type = scsi_get_tag_type(sdev);
777
778 if (!sdev->tagged_supported || !sht->change_queue_type)
779 return -EINVAL;
780
781 if (strncmp(buf, "ordered", 7) == 0)
782 tag_type = MSG_ORDERED_TAG;
783 else if (strncmp(buf, "simple", 6) == 0)
784 tag_type = MSG_SIMPLE_TAG;
785 else if (strncmp(buf, "none", 4) != 0)
786 return -EINVAL;
787
788 if (tag_type == prev_tag_type)
789 return count;
790
791 retval = sht->change_queue_type(sdev, tag_type);
792 if (retval < 0)
793 return retval;
794
795 return count;
796}
797
798static int scsi_target_add(struct scsi_target *starget)
799{
800 int error;
801
802 if (starget->state != STARGET_CREATED)
803 return 0;
804
805 error = device_add(&starget->dev);
806 if (error) {
807 dev_err(&starget->dev, "target device_add failed, error %d\n", error);
808 return error;
809 }
810 transport_add_device(&starget->dev);
811 starget->state = STARGET_RUNNING;
812
813 pm_runtime_set_active(&starget->dev);
814 pm_runtime_enable(&starget->dev);
815 device_enable_async_suspend(&starget->dev);
816
817 return 0;
818}
819
820static struct device_attribute sdev_attr_queue_type_rw =
821 __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field,
822 sdev_store_queue_type_rw);
823
824/**
825 * scsi_sysfs_add_sdev - add scsi device to sysfs
826 * @sdev: scsi_device to add
827 *
828 * Return value:
829 * 0 on Success / non-zero on Failure
830 **/
831int scsi_sysfs_add_sdev(struct scsi_device *sdev)
832{
833 int error, i;
834 struct request_queue *rq = sdev->request_queue;
835 struct scsi_target *starget = sdev->sdev_target;
836
837 error = scsi_device_set_state(sdev, SDEV_RUNNING);
838 if (error)
839 return error;
840
841 error = scsi_target_add(starget);
842 if (error)
843 return error;
844
845 transport_configure_device(&starget->dev);
846
847 device_enable_async_suspend(&sdev->sdev_gendev);
848 scsi_autopm_get_target(starget);
849 pm_runtime_set_active(&sdev->sdev_gendev);
850 pm_runtime_forbid(&sdev->sdev_gendev);
851 pm_runtime_enable(&sdev->sdev_gendev);
852 scsi_autopm_put_target(starget);
853
854 /* The following call will keep sdev active indefinitely, until
855 * its driver does a corresponding scsi_autopm_pm_device(). Only
856 * drivers supporting autosuspend will do this.
857 */
858 scsi_autopm_get_device(sdev);
859
860 error = device_add(&sdev->sdev_gendev);
861 if (error) {
862 sdev_printk(KERN_INFO, sdev,
863 "failed to add device: %d\n", error);
864 return error;
865 }
866 device_enable_async_suspend(&sdev->sdev_dev);
867 error = device_add(&sdev->sdev_dev);
868 if (error) {
869 sdev_printk(KERN_INFO, sdev,
870 "failed to add class device: %d\n", error);
871 device_del(&sdev->sdev_gendev);
872 return error;
873 }
874 transport_add_device(&sdev->sdev_gendev);
875 sdev->is_visible = 1;
876
877 /* create queue files, which may be writable, depending on the host */
878 if (sdev->host->hostt->change_queue_depth) {
879 error = device_create_file(&sdev->sdev_gendev,
880 &sdev_attr_queue_depth_rw);
881 error = device_create_file(&sdev->sdev_gendev,
882 &sdev_attr_queue_ramp_up_period);
883 }
884 else
885 error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_depth);
886 if (error)
887 return error;
888
889 if (sdev->host->hostt->change_queue_type)
890 error = device_create_file(&sdev->sdev_gendev, &sdev_attr_queue_type_rw);
891 else
892 error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_type);
893 if (error)
894 return error;
895
896 error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL);
897
898 if (error)
899 /* we're treating error on bsg register as non-fatal,
900 * so pretend nothing went wrong */
901 sdev_printk(KERN_INFO, sdev,
902 "Failed to register bsg queue, errno=%d\n", error);
903
904 /* add additional host specific attributes */
905 if (sdev->host->hostt->sdev_attrs) {
906 for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) {
907 error = device_create_file(&sdev->sdev_gendev,
908 sdev->host->hostt->sdev_attrs[i]);
909 if (error)
910 return error;
911 }
912 }
913
914 return error;
915}
916
917void __scsi_remove_device(struct scsi_device *sdev)
918{
919 struct device *dev = &sdev->sdev_gendev;
920
921 if (sdev->is_visible) {
922 if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0)
923 return;
924
925 bsg_unregister_queue(sdev->request_queue);
926 device_unregister(&sdev->sdev_dev);
927 transport_remove_device(dev);
928 device_del(dev);
929 } else
930 put_device(&sdev->sdev_dev);
931 scsi_device_set_state(sdev, SDEV_DEL);
932 if (sdev->host->hostt->slave_destroy)
933 sdev->host->hostt->slave_destroy(sdev);
934 transport_destroy_device(dev);
935
936 /* cause the request function to reject all I/O requests */
937 sdev->request_queue->queuedata = NULL;
938
939 /* Freeing the queue signals to block that we're done */
940 scsi_free_queue(sdev->request_queue);
941 put_device(dev);
942}
943
944/**
945 * scsi_remove_device - unregister a device from the scsi bus
946 * @sdev: scsi_device to unregister
947 **/
948void scsi_remove_device(struct scsi_device *sdev)
949{
950 struct Scsi_Host *shost = sdev->host;
951
952 mutex_lock(&shost->scan_mutex);
953 __scsi_remove_device(sdev);
954 mutex_unlock(&shost->scan_mutex);
955}
956EXPORT_SYMBOL(scsi_remove_device);
957
958static void __scsi_remove_target(struct scsi_target *starget)
959{
960 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
961 unsigned long flags;
962 struct scsi_device *sdev;
963
964 spin_lock_irqsave(shost->host_lock, flags);
965 starget->reap_ref++;
966 restart:
967 list_for_each_entry(sdev, &shost->__devices, siblings) {
968 if (sdev->channel != starget->channel ||
969 sdev->id != starget->id ||
970 scsi_device_get(sdev))
971 continue;
972 spin_unlock_irqrestore(shost->host_lock, flags);
973 scsi_remove_device(sdev);
974 scsi_device_put(sdev);
975 spin_lock_irqsave(shost->host_lock, flags);
976 goto restart;
977 }
978 spin_unlock_irqrestore(shost->host_lock, flags);
979 scsi_target_reap(starget);
980}
981
982static int __remove_child (struct device * dev, void * data)
983{
984 if (scsi_is_target_device(dev))
985 __scsi_remove_target(to_scsi_target(dev));
986 return 0;
987}
988
989/**
990 * scsi_remove_target - try to remove a target and all its devices
991 * @dev: generic starget or parent of generic stargets to be removed
992 *
993 * Note: This is slightly racy. It is possible that if the user
994 * requests the addition of another device then the target won't be
995 * removed.
996 */
997void scsi_remove_target(struct device *dev)
998{
999 if (scsi_is_target_device(dev)) {
1000 __scsi_remove_target(to_scsi_target(dev));
1001 return;
1002 }
1003
1004 get_device(dev);
1005 device_for_each_child(dev, NULL, __remove_child);
1006 put_device(dev);
1007}
1008EXPORT_SYMBOL(scsi_remove_target);
1009
1010int scsi_register_driver(struct device_driver *drv)
1011{
1012 drv->bus = &scsi_bus_type;
1013
1014 return driver_register(drv);
1015}
1016EXPORT_SYMBOL(scsi_register_driver);
1017
1018int scsi_register_interface(struct class_interface *intf)
1019{
1020 intf->class = &sdev_class;
1021
1022 return class_interface_register(intf);
1023}
1024EXPORT_SYMBOL(scsi_register_interface);
1025
1026/**
1027 * scsi_sysfs_add_host - add scsi host to subsystem
1028 * @shost: scsi host struct to add to subsystem
1029 **/
1030int scsi_sysfs_add_host(struct Scsi_Host *shost)
1031{
1032 int error, i;
1033
1034 /* add host specific attributes */
1035 if (shost->hostt->shost_attrs) {
1036 for (i = 0; shost->hostt->shost_attrs[i]; i++) {
1037 error = device_create_file(&shost->shost_dev,
1038 shost->hostt->shost_attrs[i]);
1039 if (error)
1040 return error;
1041 }
1042 }
1043
1044 transport_register_device(&shost->shost_gendev);
1045 transport_configure_device(&shost->shost_gendev);
1046 return 0;
1047}
1048
1049static struct device_type scsi_dev_type = {
1050 .name = "scsi_device",
1051 .release = scsi_device_dev_release,
1052 .groups = scsi_sdev_attr_groups,
1053};
1054
1055void scsi_sysfs_device_initialize(struct scsi_device *sdev)
1056{
1057 unsigned long flags;
1058 struct Scsi_Host *shost = sdev->host;
1059 struct scsi_target *starget = sdev->sdev_target;
1060
1061 device_initialize(&sdev->sdev_gendev);
1062 sdev->sdev_gendev.bus = &scsi_bus_type;
1063 sdev->sdev_gendev.type = &scsi_dev_type;
1064 dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%d",
1065 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1066
1067 device_initialize(&sdev->sdev_dev);
1068 sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev);
1069 sdev->sdev_dev.class = &sdev_class;
1070 dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%d",
1071 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1072 sdev->scsi_level = starget->scsi_level;
1073 transport_setup_device(&sdev->sdev_gendev);
1074 spin_lock_irqsave(shost->host_lock, flags);
1075 list_add_tail(&sdev->same_target_siblings, &starget->devices);
1076 list_add_tail(&sdev->siblings, &shost->__devices);
1077 spin_unlock_irqrestore(shost->host_lock, flags);
1078}
1079
1080int scsi_is_sdev_device(const struct device *dev)
1081{
1082 return dev->type == &scsi_dev_type;
1083}
1084EXPORT_SYMBOL(scsi_is_sdev_device);
1085
1086/* A blank transport template that is used in drivers that don't
1087 * yet implement Transport Attributes */
1088struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, };
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
9#include <linux/module.h>
10#include <linux/slab.h>
11#include <linux/init.h>
12#include <linux/blkdev.h>
13#include <linux/device.h>
14#include <linux/pm_runtime.h>
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>
21#include <scsi/scsi_driver.h>
22
23#include "scsi_priv.h"
24#include "scsi_logging.h"
25
26static struct device_type scsi_dev_type;
27
28static const struct {
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" },
38 { SDEV_BLOCK, "blocked" },
39 { SDEV_CREATED_BLOCK, "created-blocked" },
40};
41
42const char *scsi_device_state_name(enum scsi_device_state state)
43{
44 int i;
45 char *name = NULL;
46
47 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
48 if (sdev_states[i].value == state) {
49 name = sdev_states[i].name;
50 break;
51 }
52 }
53 return name;
54}
55
56static const struct {
57 enum scsi_host_state value;
58 char *name;
59} shost_states[] = {
60 { SHOST_CREATED, "created" },
61 { SHOST_RUNNING, "running" },
62 { SHOST_CANCEL, "cancel" },
63 { SHOST_DEL, "deleted" },
64 { SHOST_RECOVERY, "recovery" },
65 { SHOST_CANCEL_RECOVERY, "cancel/recovery" },
66 { SHOST_DEL_RECOVERY, "deleted/recovery", },
67};
68const char *scsi_host_state_name(enum scsi_host_state state)
69{
70 int i;
71 char *name = NULL;
72
73 for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
74 if (shost_states[i].value == state) {
75 name = shost_states[i].name;
76 break;
77 }
78 }
79 return name;
80}
81
82static int check_set(unsigned int *val, char *src)
83{
84 char *last;
85
86 if (strncmp(src, "-", 20) == 0) {
87 *val = SCAN_WILD_CARD;
88 } else {
89 /*
90 * Doesn't check for int overflow
91 */
92 *val = simple_strtoul(src, &last, 0);
93 if (*last != '\0')
94 return 1;
95 }
96 return 0;
97}
98
99static int scsi_scan(struct Scsi_Host *shost, const char *str)
100{
101 char s1[15], s2[15], s3[15], junk;
102 unsigned int channel, id, lun;
103 int res;
104
105 res = sscanf(str, "%10s %10s %10s %c", s1, s2, s3, &junk);
106 if (res != 3)
107 return -EINVAL;
108 if (check_set(&channel, s1))
109 return -EINVAL;
110 if (check_set(&id, s2))
111 return -EINVAL;
112 if (check_set(&lun, s3))
113 return -EINVAL;
114 if (shost->transportt->user_scan)
115 res = shost->transportt->user_scan(shost, channel, id, lun);
116 else
117 res = scsi_scan_host_selected(shost, channel, id, lun, 1);
118 return res;
119}
120
121/*
122 * shost_show_function: macro to create an attr function that can be used to
123 * show a non-bit field.
124 */
125#define shost_show_function(name, field, format_string) \
126static ssize_t \
127show_##name (struct device *dev, struct device_attribute *attr, \
128 char *buf) \
129{ \
130 struct Scsi_Host *shost = class_to_shost(dev); \
131 return snprintf (buf, 20, format_string, shost->field); \
132}
133
134/*
135 * shost_rd_attr: macro to create a function and attribute variable for a
136 * read only field.
137 */
138#define shost_rd_attr2(name, field, format_string) \
139 shost_show_function(name, field, format_string) \
140static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
141
142#define shost_rd_attr(field, format_string) \
143shost_rd_attr2(field, field, format_string)
144
145/*
146 * Create the actual show/store functions and data structures.
147 */
148
149static ssize_t
150store_scan(struct device *dev, struct device_attribute *attr,
151 const char *buf, size_t count)
152{
153 struct Scsi_Host *shost = class_to_shost(dev);
154 int res;
155
156 res = scsi_scan(shost, buf);
157 if (res == 0)
158 res = count;
159 return res;
160};
161static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan);
162
163static ssize_t
164store_shost_state(struct device *dev, struct device_attribute *attr,
165 const char *buf, size_t count)
166{
167 int i;
168 struct Scsi_Host *shost = class_to_shost(dev);
169 enum scsi_host_state state = 0;
170
171 for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
172 const int len = strlen(shost_states[i].name);
173 if (strncmp(shost_states[i].name, buf, len) == 0 &&
174 buf[len] == '\n') {
175 state = shost_states[i].value;
176 break;
177 }
178 }
179 if (!state)
180 return -EINVAL;
181
182 if (scsi_host_set_state(shost, state))
183 return -EINVAL;
184 return count;
185}
186
187static ssize_t
188show_shost_state(struct device *dev, struct device_attribute *attr, char *buf)
189{
190 struct Scsi_Host *shost = class_to_shost(dev);
191 const char *name = scsi_host_state_name(shost->shost_state);
192
193 if (!name)
194 return -EINVAL;
195
196 return snprintf(buf, 20, "%s\n", name);
197}
198
199/* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */
200struct device_attribute dev_attr_hstate =
201 __ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state);
202
203static ssize_t
204show_shost_mode(unsigned int mode, char *buf)
205{
206 ssize_t len = 0;
207
208 if (mode & MODE_INITIATOR)
209 len = sprintf(buf, "%s", "Initiator");
210
211 if (mode & MODE_TARGET)
212 len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target");
213
214 len += sprintf(buf + len, "\n");
215
216 return len;
217}
218
219static ssize_t
220show_shost_supported_mode(struct device *dev, struct device_attribute *attr,
221 char *buf)
222{
223 struct Scsi_Host *shost = class_to_shost(dev);
224 unsigned int supported_mode = shost->hostt->supported_mode;
225
226 if (supported_mode == MODE_UNKNOWN)
227 /* by default this should be initiator */
228 supported_mode = MODE_INITIATOR;
229
230 return show_shost_mode(supported_mode, buf);
231}
232
233static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL);
234
235static ssize_t
236show_shost_active_mode(struct device *dev,
237 struct device_attribute *attr, char *buf)
238{
239 struct Scsi_Host *shost = class_to_shost(dev);
240
241 if (shost->active_mode == MODE_UNKNOWN)
242 return snprintf(buf, 20, "unknown\n");
243 else
244 return show_shost_mode(shost->active_mode, buf);
245}
246
247static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL);
248
249static int check_reset_type(char *str)
250{
251 if (strncmp(str, "adapter", 10) == 0)
252 return SCSI_ADAPTER_RESET;
253 else if (strncmp(str, "firmware", 10) == 0)
254 return SCSI_FIRMWARE_RESET;
255 else
256 return 0;
257}
258
259static ssize_t
260store_host_reset(struct device *dev, struct device_attribute *attr,
261 const char *buf, size_t count)
262{
263 struct Scsi_Host *shost = class_to_shost(dev);
264 struct scsi_host_template *sht = shost->hostt;
265 int ret = -EINVAL;
266 char str[10];
267 int type;
268
269 sscanf(buf, "%s", str);
270 type = check_reset_type(str);
271
272 if (!type)
273 goto exit_store_host_reset;
274
275 if (sht->host_reset)
276 ret = sht->host_reset(shost, type);
277
278exit_store_host_reset:
279 if (ret == 0)
280 ret = count;
281 return ret;
282}
283
284static DEVICE_ATTR(host_reset, S_IWUSR, NULL, store_host_reset);
285
286shost_rd_attr(unique_id, "%u\n");
287shost_rd_attr(host_busy, "%hu\n");
288shost_rd_attr(cmd_per_lun, "%hd\n");
289shost_rd_attr(can_queue, "%hd\n");
290shost_rd_attr(sg_tablesize, "%hu\n");
291shost_rd_attr(sg_prot_tablesize, "%hu\n");
292shost_rd_attr(unchecked_isa_dma, "%d\n");
293shost_rd_attr(prot_capabilities, "%u\n");
294shost_rd_attr(prot_guard_type, "%hd\n");
295shost_rd_attr2(proc_name, hostt->proc_name, "%s\n");
296
297static struct attribute *scsi_sysfs_shost_attrs[] = {
298 &dev_attr_unique_id.attr,
299 &dev_attr_host_busy.attr,
300 &dev_attr_cmd_per_lun.attr,
301 &dev_attr_can_queue.attr,
302 &dev_attr_sg_tablesize.attr,
303 &dev_attr_sg_prot_tablesize.attr,
304 &dev_attr_unchecked_isa_dma.attr,
305 &dev_attr_proc_name.attr,
306 &dev_attr_scan.attr,
307 &dev_attr_hstate.attr,
308 &dev_attr_supported_mode.attr,
309 &dev_attr_active_mode.attr,
310 &dev_attr_prot_capabilities.attr,
311 &dev_attr_prot_guard_type.attr,
312 &dev_attr_host_reset.attr,
313 NULL
314};
315
316struct attribute_group scsi_shost_attr_group = {
317 .attrs = scsi_sysfs_shost_attrs,
318};
319
320const struct attribute_group *scsi_sysfs_shost_attr_groups[] = {
321 &scsi_shost_attr_group,
322 NULL
323};
324
325static void scsi_device_cls_release(struct device *class_dev)
326{
327 struct scsi_device *sdev;
328
329 sdev = class_to_sdev(class_dev);
330 put_device(&sdev->sdev_gendev);
331}
332
333static void scsi_device_dev_release_usercontext(struct work_struct *work)
334{
335 struct scsi_device *sdev;
336 struct device *parent;
337 struct scsi_target *starget;
338 struct list_head *this, *tmp;
339 unsigned long flags;
340
341 sdev = container_of(work, struct scsi_device, ew.work);
342
343 parent = sdev->sdev_gendev.parent;
344 starget = to_scsi_target(parent);
345
346 spin_lock_irqsave(sdev->host->host_lock, flags);
347 starget->reap_ref++;
348 list_del(&sdev->siblings);
349 list_del(&sdev->same_target_siblings);
350 list_del(&sdev->starved_entry);
351 spin_unlock_irqrestore(sdev->host->host_lock, flags);
352
353 cancel_work_sync(&sdev->event_work);
354
355 list_for_each_safe(this, tmp, &sdev->event_list) {
356 struct scsi_event *evt;
357
358 evt = list_entry(this, struct scsi_event, node);
359 list_del(&evt->node);
360 kfree(evt);
361 }
362
363 blk_put_queue(sdev->request_queue);
364 /* NULL queue means the device can't be used */
365 sdev->request_queue = NULL;
366
367 scsi_target_reap(scsi_target(sdev));
368
369 kfree(sdev->inquiry);
370 kfree(sdev);
371
372 if (parent)
373 put_device(parent);
374}
375
376static void scsi_device_dev_release(struct device *dev)
377{
378 struct scsi_device *sdp = to_scsi_device(dev);
379 execute_in_process_context(scsi_device_dev_release_usercontext,
380 &sdp->ew);
381}
382
383static struct class sdev_class = {
384 .name = "scsi_device",
385 .dev_release = scsi_device_cls_release,
386};
387
388/* all probing is done in the individual ->probe routines */
389static int scsi_bus_match(struct device *dev, struct device_driver *gendrv)
390{
391 struct scsi_device *sdp;
392
393 if (dev->type != &scsi_dev_type)
394 return 0;
395
396 sdp = to_scsi_device(dev);
397 if (sdp->no_uld_attach)
398 return 0;
399 return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0;
400}
401
402static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
403{
404 struct scsi_device *sdev;
405
406 if (dev->type != &scsi_dev_type)
407 return 0;
408
409 sdev = to_scsi_device(dev);
410
411 add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type);
412 return 0;
413}
414
415struct bus_type scsi_bus_type = {
416 .name = "scsi",
417 .match = scsi_bus_match,
418 .uevent = scsi_bus_uevent,
419#ifdef CONFIG_PM
420 .pm = &scsi_bus_pm_ops,
421#endif
422};
423EXPORT_SYMBOL_GPL(scsi_bus_type);
424
425int scsi_sysfs_register(void)
426{
427 int error;
428
429 error = bus_register(&scsi_bus_type);
430 if (!error) {
431 error = class_register(&sdev_class);
432 if (error)
433 bus_unregister(&scsi_bus_type);
434 }
435
436 return error;
437}
438
439void scsi_sysfs_unregister(void)
440{
441 class_unregister(&sdev_class);
442 bus_unregister(&scsi_bus_type);
443}
444
445/*
446 * sdev_show_function: macro to create an attr function that can be used to
447 * show a non-bit field.
448 */
449#define sdev_show_function(field, format_string) \
450static ssize_t \
451sdev_show_##field (struct device *dev, struct device_attribute *attr, \
452 char *buf) \
453{ \
454 struct scsi_device *sdev; \
455 sdev = to_scsi_device(dev); \
456 return snprintf (buf, 20, format_string, sdev->field); \
457} \
458
459/*
460 * sdev_rd_attr: macro to create a function and attribute variable for a
461 * read only field.
462 */
463#define sdev_rd_attr(field, format_string) \
464 sdev_show_function(field, format_string) \
465static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL);
466
467
468/*
469 * sdev_rw_attr: create a function and attribute variable for a
470 * read/write field.
471 */
472#define sdev_rw_attr(field, format_string) \
473 sdev_show_function(field, format_string) \
474 \
475static ssize_t \
476sdev_store_##field (struct device *dev, struct device_attribute *attr, \
477 const char *buf, size_t count) \
478{ \
479 struct scsi_device *sdev; \
480 sdev = to_scsi_device(dev); \
481 sscanf (buf, format_string, &sdev->field); \
482 return count; \
483} \
484static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
485
486/* Currently we don't export bit fields, but we might in future,
487 * so leave this code in */
488#if 0
489/*
490 * sdev_rd_attr: create a function and attribute variable for a
491 * read/write bit field.
492 */
493#define sdev_rw_attr_bit(field) \
494 sdev_show_function(field, "%d\n") \
495 \
496static ssize_t \
497sdev_store_##field (struct device *dev, struct device_attribute *attr, \
498 const char *buf, size_t count) \
499{ \
500 int ret; \
501 struct scsi_device *sdev; \
502 ret = scsi_sdev_check_buf_bit(buf); \
503 if (ret >= 0) { \
504 sdev = to_scsi_device(dev); \
505 sdev->field = ret; \
506 ret = count; \
507 } \
508 return ret; \
509} \
510static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
511
512/*
513 * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1",
514 * else return -EINVAL.
515 */
516static int scsi_sdev_check_buf_bit(const char *buf)
517{
518 if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
519 if (buf[0] == '1')
520 return 1;
521 else if (buf[0] == '0')
522 return 0;
523 else
524 return -EINVAL;
525 } else
526 return -EINVAL;
527}
528#endif
529/*
530 * Create the actual show/store functions and data structures.
531 */
532sdev_rd_attr (device_blocked, "%d\n");
533sdev_rd_attr (queue_depth, "%d\n");
534sdev_rd_attr (type, "%d\n");
535sdev_rd_attr (scsi_level, "%d\n");
536sdev_rd_attr (vendor, "%.8s\n");
537sdev_rd_attr (model, "%.16s\n");
538sdev_rd_attr (rev, "%.4s\n");
539
540/*
541 * TODO: can we make these symlinks to the block layer ones?
542 */
543static ssize_t
544sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf)
545{
546 struct scsi_device *sdev;
547 sdev = to_scsi_device(dev);
548 return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ);
549}
550
551static ssize_t
552sdev_store_timeout (struct device *dev, struct device_attribute *attr,
553 const char *buf, size_t count)
554{
555 struct scsi_device *sdev;
556 int timeout;
557 sdev = to_scsi_device(dev);
558 sscanf (buf, "%d\n", &timeout);
559 blk_queue_rq_timeout(sdev->request_queue, timeout * HZ);
560 return count;
561}
562static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout);
563
564static ssize_t
565store_rescan_field (struct device *dev, struct device_attribute *attr,
566 const char *buf, size_t count)
567{
568 scsi_rescan_device(dev);
569 return count;
570}
571static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field);
572
573static void sdev_store_delete_callback(struct device *dev)
574{
575 scsi_remove_device(to_scsi_device(dev));
576}
577
578static ssize_t
579sdev_store_delete(struct device *dev, struct device_attribute *attr,
580 const char *buf, size_t count)
581{
582 int rc;
583
584 /* An attribute cannot be unregistered by one of its own methods,
585 * so we have to use this roundabout approach.
586 */
587 rc = device_schedule_callback(dev, sdev_store_delete_callback);
588 if (rc)
589 count = rc;
590 return count;
591};
592static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete);
593
594static ssize_t
595store_state_field(struct device *dev, struct device_attribute *attr,
596 const char *buf, size_t count)
597{
598 int i;
599 struct scsi_device *sdev = to_scsi_device(dev);
600 enum scsi_device_state state = 0;
601
602 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
603 const int len = strlen(sdev_states[i].name);
604 if (strncmp(sdev_states[i].name, buf, len) == 0 &&
605 buf[len] == '\n') {
606 state = sdev_states[i].value;
607 break;
608 }
609 }
610 if (!state)
611 return -EINVAL;
612
613 if (scsi_device_set_state(sdev, state))
614 return -EINVAL;
615 return count;
616}
617
618static ssize_t
619show_state_field(struct device *dev, struct device_attribute *attr, char *buf)
620{
621 struct scsi_device *sdev = to_scsi_device(dev);
622 const char *name = scsi_device_state_name(sdev->sdev_state);
623
624 if (!name)
625 return -EINVAL;
626
627 return snprintf(buf, 20, "%s\n", name);
628}
629
630static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field);
631
632static ssize_t
633show_queue_type_field(struct device *dev, struct device_attribute *attr,
634 char *buf)
635{
636 struct scsi_device *sdev = to_scsi_device(dev);
637 const char *name = "none";
638
639 if (sdev->ordered_tags)
640 name = "ordered";
641 else if (sdev->simple_tags)
642 name = "simple";
643
644 return snprintf(buf, 20, "%s\n", name);
645}
646
647static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL);
648
649static ssize_t
650show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf)
651{
652 return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8);
653}
654
655static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL);
656
657#define show_sdev_iostat(field) \
658static ssize_t \
659show_iostat_##field(struct device *dev, struct device_attribute *attr, \
660 char *buf) \
661{ \
662 struct scsi_device *sdev = to_scsi_device(dev); \
663 unsigned long long count = atomic_read(&sdev->field); \
664 return snprintf(buf, 20, "0x%llx\n", count); \
665} \
666static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL)
667
668show_sdev_iostat(iorequest_cnt);
669show_sdev_iostat(iodone_cnt);
670show_sdev_iostat(ioerr_cnt);
671
672static ssize_t
673sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
674{
675 struct scsi_device *sdev;
676 sdev = to_scsi_device(dev);
677 return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type);
678}
679static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL);
680
681#define DECLARE_EVT_SHOW(name, Cap_name) \
682static ssize_t \
683sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \
684 char *buf) \
685{ \
686 struct scsi_device *sdev = to_scsi_device(dev); \
687 int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\
688 return snprintf(buf, 20, "%d\n", val); \
689}
690
691#define DECLARE_EVT_STORE(name, Cap_name) \
692static ssize_t \
693sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\
694 const char *buf, size_t count) \
695{ \
696 struct scsi_device *sdev = to_scsi_device(dev); \
697 int val = simple_strtoul(buf, NULL, 0); \
698 if (val == 0) \
699 clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
700 else if (val == 1) \
701 set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
702 else \
703 return -EINVAL; \
704 return count; \
705}
706
707#define DECLARE_EVT(name, Cap_name) \
708 DECLARE_EVT_SHOW(name, Cap_name) \
709 DECLARE_EVT_STORE(name, Cap_name) \
710 static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \
711 sdev_store_evt_##name);
712#define REF_EVT(name) &dev_attr_evt_##name.attr
713
714DECLARE_EVT(media_change, MEDIA_CHANGE)
715
716/* Default template for device attributes. May NOT be modified */
717static struct attribute *scsi_sdev_attrs[] = {
718 &dev_attr_device_blocked.attr,
719 &dev_attr_type.attr,
720 &dev_attr_scsi_level.attr,
721 &dev_attr_vendor.attr,
722 &dev_attr_model.attr,
723 &dev_attr_rev.attr,
724 &dev_attr_rescan.attr,
725 &dev_attr_delete.attr,
726 &dev_attr_state.attr,
727 &dev_attr_timeout.attr,
728 &dev_attr_iocounterbits.attr,
729 &dev_attr_iorequest_cnt.attr,
730 &dev_attr_iodone_cnt.attr,
731 &dev_attr_ioerr_cnt.attr,
732 &dev_attr_modalias.attr,
733 REF_EVT(media_change),
734 NULL
735};
736
737static struct attribute_group scsi_sdev_attr_group = {
738 .attrs = scsi_sdev_attrs,
739};
740
741static const struct attribute_group *scsi_sdev_attr_groups[] = {
742 &scsi_sdev_attr_group,
743 NULL
744};
745
746static ssize_t
747sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr,
748 const char *buf, size_t count)
749{
750 int depth, retval;
751 struct scsi_device *sdev = to_scsi_device(dev);
752 struct scsi_host_template *sht = sdev->host->hostt;
753
754 if (!sht->change_queue_depth)
755 return -EINVAL;
756
757 depth = simple_strtoul(buf, NULL, 0);
758
759 if (depth < 1)
760 return -EINVAL;
761
762 retval = sht->change_queue_depth(sdev, depth,
763 SCSI_QDEPTH_DEFAULT);
764 if (retval < 0)
765 return retval;
766
767 sdev->max_queue_depth = sdev->queue_depth;
768
769 return count;
770}
771
772static struct device_attribute sdev_attr_queue_depth_rw =
773 __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth,
774 sdev_store_queue_depth_rw);
775
776static ssize_t
777sdev_show_queue_ramp_up_period(struct device *dev,
778 struct device_attribute *attr,
779 char *buf)
780{
781 struct scsi_device *sdev;
782 sdev = to_scsi_device(dev);
783 return snprintf(buf, 20, "%u\n",
784 jiffies_to_msecs(sdev->queue_ramp_up_period));
785}
786
787static ssize_t
788sdev_store_queue_ramp_up_period(struct device *dev,
789 struct device_attribute *attr,
790 const char *buf, size_t count)
791{
792 struct scsi_device *sdev = to_scsi_device(dev);
793 unsigned long period;
794
795 if (strict_strtoul(buf, 10, &period))
796 return -EINVAL;
797
798 sdev->queue_ramp_up_period = msecs_to_jiffies(period);
799 return period;
800}
801
802static struct device_attribute sdev_attr_queue_ramp_up_period =
803 __ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR,
804 sdev_show_queue_ramp_up_period,
805 sdev_store_queue_ramp_up_period);
806
807static ssize_t
808sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr,
809 const char *buf, size_t count)
810{
811 struct scsi_device *sdev = to_scsi_device(dev);
812 struct scsi_host_template *sht = sdev->host->hostt;
813 int tag_type = 0, retval;
814 int prev_tag_type = scsi_get_tag_type(sdev);
815
816 if (!sdev->tagged_supported || !sht->change_queue_type)
817 return -EINVAL;
818
819 if (strncmp(buf, "ordered", 7) == 0)
820 tag_type = MSG_ORDERED_TAG;
821 else if (strncmp(buf, "simple", 6) == 0)
822 tag_type = MSG_SIMPLE_TAG;
823 else if (strncmp(buf, "none", 4) != 0)
824 return -EINVAL;
825
826 if (tag_type == prev_tag_type)
827 return count;
828
829 retval = sht->change_queue_type(sdev, tag_type);
830 if (retval < 0)
831 return retval;
832
833 return count;
834}
835
836static int scsi_target_add(struct scsi_target *starget)
837{
838 int error;
839
840 if (starget->state != STARGET_CREATED)
841 return 0;
842
843 error = device_add(&starget->dev);
844 if (error) {
845 dev_err(&starget->dev, "target device_add failed, error %d\n", error);
846 return error;
847 }
848 transport_add_device(&starget->dev);
849 starget->state = STARGET_RUNNING;
850
851 pm_runtime_set_active(&starget->dev);
852 pm_runtime_enable(&starget->dev);
853 device_enable_async_suspend(&starget->dev);
854
855 return 0;
856}
857
858static struct device_attribute sdev_attr_queue_type_rw =
859 __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field,
860 sdev_store_queue_type_rw);
861
862/**
863 * scsi_sysfs_add_sdev - add scsi device to sysfs
864 * @sdev: scsi_device to add
865 *
866 * Return value:
867 * 0 on Success / non-zero on Failure
868 **/
869int scsi_sysfs_add_sdev(struct scsi_device *sdev)
870{
871 int error, i;
872 struct request_queue *rq = sdev->request_queue;
873 struct scsi_target *starget = sdev->sdev_target;
874
875 error = scsi_device_set_state(sdev, SDEV_RUNNING);
876 if (error)
877 return error;
878
879 error = scsi_target_add(starget);
880 if (error)
881 return error;
882
883 transport_configure_device(&starget->dev);
884
885 device_enable_async_suspend(&sdev->sdev_gendev);
886 scsi_autopm_get_target(starget);
887 pm_runtime_set_active(&sdev->sdev_gendev);
888 pm_runtime_forbid(&sdev->sdev_gendev);
889 pm_runtime_enable(&sdev->sdev_gendev);
890 scsi_autopm_put_target(starget);
891
892 /* The following call will keep sdev active indefinitely, until
893 * its driver does a corresponding scsi_autopm_pm_device(). Only
894 * drivers supporting autosuspend will do this.
895 */
896 scsi_autopm_get_device(sdev);
897
898 error = device_add(&sdev->sdev_gendev);
899 if (error) {
900 sdev_printk(KERN_INFO, sdev,
901 "failed to add device: %d\n", error);
902 return error;
903 }
904 device_enable_async_suspend(&sdev->sdev_dev);
905 error = device_add(&sdev->sdev_dev);
906 if (error) {
907 sdev_printk(KERN_INFO, sdev,
908 "failed to add class device: %d\n", error);
909 device_del(&sdev->sdev_gendev);
910 return error;
911 }
912 transport_add_device(&sdev->sdev_gendev);
913 sdev->is_visible = 1;
914
915 /* create queue files, which may be writable, depending on the host */
916 if (sdev->host->hostt->change_queue_depth) {
917 error = device_create_file(&sdev->sdev_gendev,
918 &sdev_attr_queue_depth_rw);
919 error = device_create_file(&sdev->sdev_gendev,
920 &sdev_attr_queue_ramp_up_period);
921 }
922 else
923 error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_depth);
924 if (error)
925 return error;
926
927 if (sdev->host->hostt->change_queue_type)
928 error = device_create_file(&sdev->sdev_gendev, &sdev_attr_queue_type_rw);
929 else
930 error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_type);
931 if (error)
932 return error;
933
934 error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL);
935
936 if (error)
937 /* we're treating error on bsg register as non-fatal,
938 * so pretend nothing went wrong */
939 sdev_printk(KERN_INFO, sdev,
940 "Failed to register bsg queue, errno=%d\n", error);
941
942 /* add additional host specific attributes */
943 if (sdev->host->hostt->sdev_attrs) {
944 for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) {
945 error = device_create_file(&sdev->sdev_gendev,
946 sdev->host->hostt->sdev_attrs[i]);
947 if (error)
948 return error;
949 }
950 }
951
952 return error;
953}
954
955void __scsi_remove_device(struct scsi_device *sdev)
956{
957 struct device *dev = &sdev->sdev_gendev;
958
959 if (sdev->is_visible) {
960 if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0)
961 return;
962
963 bsg_unregister_queue(sdev->request_queue);
964 device_unregister(&sdev->sdev_dev);
965 transport_remove_device(dev);
966 device_del(dev);
967 } else
968 put_device(&sdev->sdev_dev);
969 scsi_device_set_state(sdev, SDEV_DEL);
970 if (sdev->host->hostt->slave_destroy)
971 sdev->host->hostt->slave_destroy(sdev);
972 transport_destroy_device(dev);
973
974 /* Freeing the queue signals to block that we're done */
975 blk_cleanup_queue(sdev->request_queue);
976 put_device(dev);
977}
978
979/**
980 * scsi_remove_device - unregister a device from the scsi bus
981 * @sdev: scsi_device to unregister
982 **/
983void scsi_remove_device(struct scsi_device *sdev)
984{
985 struct Scsi_Host *shost = sdev->host;
986
987 mutex_lock(&shost->scan_mutex);
988 __scsi_remove_device(sdev);
989 mutex_unlock(&shost->scan_mutex);
990}
991EXPORT_SYMBOL(scsi_remove_device);
992
993static void __scsi_remove_target(struct scsi_target *starget)
994{
995 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
996 unsigned long flags;
997 struct scsi_device *sdev;
998
999 spin_lock_irqsave(shost->host_lock, flags);
1000 restart:
1001 list_for_each_entry(sdev, &shost->__devices, siblings) {
1002 if (sdev->channel != starget->channel ||
1003 sdev->id != starget->id ||
1004 scsi_device_get(sdev))
1005 continue;
1006 spin_unlock_irqrestore(shost->host_lock, flags);
1007 scsi_remove_device(sdev);
1008 scsi_device_put(sdev);
1009 spin_lock_irqsave(shost->host_lock, flags);
1010 goto restart;
1011 }
1012 spin_unlock_irqrestore(shost->host_lock, flags);
1013}
1014
1015/**
1016 * scsi_remove_target - try to remove a target and all its devices
1017 * @dev: generic starget or parent of generic stargets to be removed
1018 *
1019 * Note: This is slightly racy. It is possible that if the user
1020 * requests the addition of another device then the target won't be
1021 * removed.
1022 */
1023void scsi_remove_target(struct device *dev)
1024{
1025 struct Scsi_Host *shost = dev_to_shost(dev->parent);
1026 struct scsi_target *starget, *last = NULL;
1027 unsigned long flags;
1028
1029 /* remove targets being careful to lookup next entry before
1030 * deleting the last
1031 */
1032 spin_lock_irqsave(shost->host_lock, flags);
1033 list_for_each_entry(starget, &shost->__targets, siblings) {
1034 if (starget->state == STARGET_DEL)
1035 continue;
1036 if (starget->dev.parent == dev || &starget->dev == dev) {
1037 /* assuming new targets arrive at the end */
1038 starget->reap_ref++;
1039 spin_unlock_irqrestore(shost->host_lock, flags);
1040 if (last)
1041 scsi_target_reap(last);
1042 last = starget;
1043 __scsi_remove_target(starget);
1044 spin_lock_irqsave(shost->host_lock, flags);
1045 }
1046 }
1047 spin_unlock_irqrestore(shost->host_lock, flags);
1048
1049 if (last)
1050 scsi_target_reap(last);
1051}
1052EXPORT_SYMBOL(scsi_remove_target);
1053
1054int scsi_register_driver(struct device_driver *drv)
1055{
1056 drv->bus = &scsi_bus_type;
1057
1058 return driver_register(drv);
1059}
1060EXPORT_SYMBOL(scsi_register_driver);
1061
1062int scsi_register_interface(struct class_interface *intf)
1063{
1064 intf->class = &sdev_class;
1065
1066 return class_interface_register(intf);
1067}
1068EXPORT_SYMBOL(scsi_register_interface);
1069
1070/**
1071 * scsi_sysfs_add_host - add scsi host to subsystem
1072 * @shost: scsi host struct to add to subsystem
1073 **/
1074int scsi_sysfs_add_host(struct Scsi_Host *shost)
1075{
1076 int error, i;
1077
1078 /* add host specific attributes */
1079 if (shost->hostt->shost_attrs) {
1080 for (i = 0; shost->hostt->shost_attrs[i]; i++) {
1081 error = device_create_file(&shost->shost_dev,
1082 shost->hostt->shost_attrs[i]);
1083 if (error)
1084 return error;
1085 }
1086 }
1087
1088 transport_register_device(&shost->shost_gendev);
1089 transport_configure_device(&shost->shost_gendev);
1090 return 0;
1091}
1092
1093static struct device_type scsi_dev_type = {
1094 .name = "scsi_device",
1095 .release = scsi_device_dev_release,
1096 .groups = scsi_sdev_attr_groups,
1097};
1098
1099void scsi_sysfs_device_initialize(struct scsi_device *sdev)
1100{
1101 unsigned long flags;
1102 struct Scsi_Host *shost = sdev->host;
1103 struct scsi_target *starget = sdev->sdev_target;
1104
1105 device_initialize(&sdev->sdev_gendev);
1106 sdev->sdev_gendev.bus = &scsi_bus_type;
1107 sdev->sdev_gendev.type = &scsi_dev_type;
1108 dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%d",
1109 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1110
1111 device_initialize(&sdev->sdev_dev);
1112 sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev);
1113 sdev->sdev_dev.class = &sdev_class;
1114 dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%d",
1115 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1116 sdev->scsi_level = starget->scsi_level;
1117 transport_setup_device(&sdev->sdev_gendev);
1118 spin_lock_irqsave(shost->host_lock, flags);
1119 list_add_tail(&sdev->same_target_siblings, &starget->devices);
1120 list_add_tail(&sdev->siblings, &shost->__devices);
1121 spin_unlock_irqrestore(shost->host_lock, flags);
1122}
1123
1124int scsi_is_sdev_device(const struct device *dev)
1125{
1126 return dev->type == &scsi_dev_type;
1127}
1128EXPORT_SYMBOL(scsi_is_sdev_device);
1129
1130/* A blank transport template that is used in drivers that don't
1131 * yet implement Transport Attributes */
1132struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, };