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10#include <linux/module.h>
11#include <linux/slab.h>
12#include <linux/init.h>
13#include <linux/blkdev.h>
14#include <linux/device.h>
15#include <linux/pm_runtime.h>
16
17#include <scsi/scsi.h>
18#include <scsi/scsi_device.h>
19#include <scsi/scsi_host.h>
20#include <scsi/scsi_tcq.h>
21#include <scsi/scsi_dh.h>
22#include <scsi/scsi_transport.h>
23#include <scsi/scsi_driver.h>
24#include <scsi/scsi_devinfo.h>
25
26#include "scsi_priv.h"
27#include "scsi_logging.h"
28
29static struct device_type scsi_dev_type;
30
31static const struct {
32 enum scsi_device_state value;
33 char *name;
34} sdev_states[] = {
35 { SDEV_CREATED, "created" },
36 { SDEV_RUNNING, "running" },
37 { SDEV_CANCEL, "cancel" },
38 { SDEV_DEL, "deleted" },
39 { SDEV_QUIESCE, "quiesce" },
40 { SDEV_OFFLINE, "offline" },
41 { SDEV_TRANSPORT_OFFLINE, "transport-offline" },
42 { SDEV_BLOCK, "blocked" },
43 { SDEV_CREATED_BLOCK, "created-blocked" },
44};
45
46const char *scsi_device_state_name(enum scsi_device_state state)
47{
48 int i;
49 char *name = NULL;
50
51 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
52 if (sdev_states[i].value == state) {
53 name = sdev_states[i].name;
54 break;
55 }
56 }
57 return name;
58}
59
60static const struct {
61 enum scsi_host_state value;
62 char *name;
63} shost_states[] = {
64 { SHOST_CREATED, "created" },
65 { SHOST_RUNNING, "running" },
66 { SHOST_CANCEL, "cancel" },
67 { SHOST_DEL, "deleted" },
68 { SHOST_RECOVERY, "recovery" },
69 { SHOST_CANCEL_RECOVERY, "cancel/recovery" },
70 { SHOST_DEL_RECOVERY, "deleted/recovery", },
71};
72const char *scsi_host_state_name(enum scsi_host_state state)
73{
74 int i;
75 char *name = NULL;
76
77 for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
78 if (shost_states[i].value == state) {
79 name = shost_states[i].name;
80 break;
81 }
82 }
83 return name;
84}
85
86#ifdef CONFIG_SCSI_DH
87static const struct {
88 unsigned char value;
89 char *name;
90} sdev_access_states[] = {
91 { SCSI_ACCESS_STATE_OPTIMAL, "active/optimized" },
92 { SCSI_ACCESS_STATE_ACTIVE, "active/non-optimized" },
93 { SCSI_ACCESS_STATE_STANDBY, "standby" },
94 { SCSI_ACCESS_STATE_UNAVAILABLE, "unavailable" },
95 { SCSI_ACCESS_STATE_LBA, "lba-dependent" },
96 { SCSI_ACCESS_STATE_OFFLINE, "offline" },
97 { SCSI_ACCESS_STATE_TRANSITIONING, "transitioning" },
98};
99
100static const char *scsi_access_state_name(unsigned char state)
101{
102 int i;
103 char *name = NULL;
104
105 for (i = 0; i < ARRAY_SIZE(sdev_access_states); i++) {
106 if (sdev_access_states[i].value == state) {
107 name = sdev_access_states[i].name;
108 break;
109 }
110 }
111 return name;
112}
113#endif
114
115static int check_set(unsigned long long *val, char *src)
116{
117 char *last;
118
119 if (strcmp(src, "-") == 0) {
120 *val = SCAN_WILD_CARD;
121 } else {
122
123
124
125 *val = simple_strtoull(src, &last, 0);
126 if (*last != '\0')
127 return 1;
128 }
129 return 0;
130}
131
132static int scsi_scan(struct Scsi_Host *shost, const char *str)
133{
134 char s1[15], s2[15], s3[17], junk;
135 unsigned long long channel, id, lun;
136 int res;
137
138 res = sscanf(str, "%10s %10s %16s %c", s1, s2, s3, &junk);
139 if (res != 3)
140 return -EINVAL;
141 if (check_set(&channel, s1))
142 return -EINVAL;
143 if (check_set(&id, s2))
144 return -EINVAL;
145 if (check_set(&lun, s3))
146 return -EINVAL;
147 if (shost->transportt->user_scan)
148 res = shost->transportt->user_scan(shost, channel, id, lun);
149 else
150 res = scsi_scan_host_selected(shost, channel, id, lun,
151 SCSI_SCAN_MANUAL);
152 return res;
153}
154
155
156
157
158
159#define shost_show_function(name, field, format_string) \
160static ssize_t \
161show_##name (struct device *dev, struct device_attribute *attr, \
162 char *buf) \
163{ \
164 struct Scsi_Host *shost = class_to_shost(dev); \
165 return snprintf (buf, 20, format_string, shost->field); \
166}
167
168
169
170
171
172#define shost_rd_attr2(name, field, format_string) \
173 shost_show_function(name, field, format_string) \
174static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
175
176#define shost_rd_attr(field, format_string) \
177shost_rd_attr2(field, field, format_string)
178
179
180
181
182
183static ssize_t
184store_scan(struct device *dev, struct device_attribute *attr,
185 const char *buf, size_t count)
186{
187 struct Scsi_Host *shost = class_to_shost(dev);
188 int res;
189
190 res = scsi_scan(shost, buf);
191 if (res == 0)
192 res = count;
193 return res;
194};
195static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan);
196
197static ssize_t
198store_shost_state(struct device *dev, struct device_attribute *attr,
199 const char *buf, size_t count)
200{
201 int i;
202 struct Scsi_Host *shost = class_to_shost(dev);
203 enum scsi_host_state state = 0;
204
205 for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
206 const int len = strlen(shost_states[i].name);
207 if (strncmp(shost_states[i].name, buf, len) == 0 &&
208 buf[len] == '\n') {
209 state = shost_states[i].value;
210 break;
211 }
212 }
213 if (!state)
214 return -EINVAL;
215
216 if (scsi_host_set_state(shost, state))
217 return -EINVAL;
218 return count;
219}
220
221static ssize_t
222show_shost_state(struct device *dev, struct device_attribute *attr, char *buf)
223{
224 struct Scsi_Host *shost = class_to_shost(dev);
225 const char *name = scsi_host_state_name(shost->shost_state);
226
227 if (!name)
228 return -EINVAL;
229
230 return snprintf(buf, 20, "%s\n", name);
231}
232
233
234static struct device_attribute dev_attr_hstate =
235 __ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state);
236
237static ssize_t
238show_shost_mode(unsigned int mode, char *buf)
239{
240 ssize_t len = 0;
241
242 if (mode & MODE_INITIATOR)
243 len = sprintf(buf, "%s", "Initiator");
244
245 if (mode & MODE_TARGET)
246 len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target");
247
248 len += sprintf(buf + len, "\n");
249
250 return len;
251}
252
253static ssize_t
254show_shost_supported_mode(struct device *dev, struct device_attribute *attr,
255 char *buf)
256{
257 struct Scsi_Host *shost = class_to_shost(dev);
258 unsigned int supported_mode = shost->hostt->supported_mode;
259
260 if (supported_mode == MODE_UNKNOWN)
261
262 supported_mode = MODE_INITIATOR;
263
264 return show_shost_mode(supported_mode, buf);
265}
266
267static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL);
268
269static ssize_t
270show_shost_active_mode(struct device *dev,
271 struct device_attribute *attr, char *buf)
272{
273 struct Scsi_Host *shost = class_to_shost(dev);
274
275 if (shost->active_mode == MODE_UNKNOWN)
276 return snprintf(buf, 20, "unknown\n");
277 else
278 return show_shost_mode(shost->active_mode, buf);
279}
280
281static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL);
282
283static int check_reset_type(const char *str)
284{
285 if (sysfs_streq(str, "adapter"))
286 return SCSI_ADAPTER_RESET;
287 else if (sysfs_streq(str, "firmware"))
288 return SCSI_FIRMWARE_RESET;
289 else
290 return 0;
291}
292
293static ssize_t
294store_host_reset(struct device *dev, struct device_attribute *attr,
295 const char *buf, size_t count)
296{
297 struct Scsi_Host *shost = class_to_shost(dev);
298 struct scsi_host_template *sht = shost->hostt;
299 int ret = -EINVAL;
300 int type;
301
302 type = check_reset_type(buf);
303 if (!type)
304 goto exit_store_host_reset;
305
306 if (sht->host_reset)
307 ret = sht->host_reset(shost, type);
308 else
309 ret = -EOPNOTSUPP;
310
311exit_store_host_reset:
312 if (ret == 0)
313 ret = count;
314 return ret;
315}
316
317static DEVICE_ATTR(host_reset, S_IWUSR, NULL, store_host_reset);
318
319static ssize_t
320show_shost_eh_deadline(struct device *dev,
321 struct device_attribute *attr, char *buf)
322{
323 struct Scsi_Host *shost = class_to_shost(dev);
324
325 if (shost->eh_deadline == -1)
326 return snprintf(buf, strlen("off") + 2, "off\n");
327 return sprintf(buf, "%u\n", shost->eh_deadline / HZ);
328}
329
330static ssize_t
331store_shost_eh_deadline(struct device *dev, struct device_attribute *attr,
332 const char *buf, size_t count)
333{
334 struct Scsi_Host *shost = class_to_shost(dev);
335 int ret = -EINVAL;
336 unsigned long deadline, flags;
337
338 if (shost->transportt &&
339 (shost->transportt->eh_strategy_handler ||
340 !shost->hostt->eh_host_reset_handler))
341 return ret;
342
343 if (!strncmp(buf, "off", strlen("off")))
344 deadline = -1;
345 else {
346 ret = kstrtoul(buf, 10, &deadline);
347 if (ret)
348 return ret;
349 if (deadline * HZ > UINT_MAX)
350 return -EINVAL;
351 }
352
353 spin_lock_irqsave(shost->host_lock, flags);
354 if (scsi_host_in_recovery(shost))
355 ret = -EBUSY;
356 else {
357 if (deadline == -1)
358 shost->eh_deadline = -1;
359 else
360 shost->eh_deadline = deadline * HZ;
361
362 ret = count;
363 }
364 spin_unlock_irqrestore(shost->host_lock, flags);
365
366 return ret;
367}
368
369static DEVICE_ATTR(eh_deadline, S_IRUGO | S_IWUSR, show_shost_eh_deadline, store_shost_eh_deadline);
370
371shost_rd_attr(unique_id, "%u\n");
372shost_rd_attr(cmd_per_lun, "%hd\n");
373shost_rd_attr(can_queue, "%d\n");
374shost_rd_attr(sg_tablesize, "%hu\n");
375shost_rd_attr(sg_prot_tablesize, "%hu\n");
376shost_rd_attr(unchecked_isa_dma, "%d\n");
377shost_rd_attr(prot_capabilities, "%u\n");
378shost_rd_attr(prot_guard_type, "%hd\n");
379shost_rd_attr2(proc_name, hostt->proc_name, "%s\n");
380
381static ssize_t
382show_host_busy(struct device *dev, struct device_attribute *attr, char *buf)
383{
384 struct Scsi_Host *shost = class_to_shost(dev);
385 return snprintf(buf, 20, "%d\n", scsi_host_busy(shost));
386}
387static DEVICE_ATTR(host_busy, S_IRUGO, show_host_busy, NULL);
388
389static ssize_t
390show_use_blk_mq(struct device *dev, struct device_attribute *attr, char *buf)
391{
392 return sprintf(buf, "1\n");
393}
394static DEVICE_ATTR(use_blk_mq, S_IRUGO, show_use_blk_mq, NULL);
395
396static ssize_t
397show_nr_hw_queues(struct device *dev, struct device_attribute *attr, char *buf)
398{
399 struct Scsi_Host *shost = class_to_shost(dev);
400 struct blk_mq_tag_set *tag_set = &shost->tag_set;
401
402 return snprintf(buf, 20, "%d\n", tag_set->nr_hw_queues);
403}
404static DEVICE_ATTR(nr_hw_queues, S_IRUGO, show_nr_hw_queues, NULL);
405
406static struct attribute *scsi_sysfs_shost_attrs[] = {
407 &dev_attr_use_blk_mq.attr,
408 &dev_attr_unique_id.attr,
409 &dev_attr_host_busy.attr,
410 &dev_attr_cmd_per_lun.attr,
411 &dev_attr_can_queue.attr,
412 &dev_attr_sg_tablesize.attr,
413 &dev_attr_sg_prot_tablesize.attr,
414 &dev_attr_unchecked_isa_dma.attr,
415 &dev_attr_proc_name.attr,
416 &dev_attr_scan.attr,
417 &dev_attr_hstate.attr,
418 &dev_attr_supported_mode.attr,
419 &dev_attr_active_mode.attr,
420 &dev_attr_prot_capabilities.attr,
421 &dev_attr_prot_guard_type.attr,
422 &dev_attr_host_reset.attr,
423 &dev_attr_eh_deadline.attr,
424 &dev_attr_nr_hw_queues.attr,
425 NULL
426};
427
428static struct attribute_group scsi_shost_attr_group = {
429 .attrs = scsi_sysfs_shost_attrs,
430};
431
432const struct attribute_group *scsi_sysfs_shost_attr_groups[] = {
433 &scsi_shost_attr_group,
434 NULL
435};
436
437static void scsi_device_cls_release(struct device *class_dev)
438{
439 struct scsi_device *sdev;
440
441 sdev = class_to_sdev(class_dev);
442 put_device(&sdev->sdev_gendev);
443}
444
445static void scsi_device_dev_release_usercontext(struct work_struct *work)
446{
447 struct scsi_device *sdev;
448 struct device *parent;
449 struct list_head *this, *tmp;
450 struct scsi_vpd *vpd_pg80 = NULL, *vpd_pg83 = NULL;
451 struct scsi_vpd *vpd_pg0 = NULL, *vpd_pg89 = NULL;
452 unsigned long flags;
453 struct module *mod;
454
455 sdev = container_of(work, struct scsi_device, ew.work);
456
457 mod = sdev->host->hostt->module;
458
459 scsi_dh_release_device(sdev);
460
461 parent = sdev->sdev_gendev.parent;
462
463 spin_lock_irqsave(sdev->host->host_lock, flags);
464 list_del(&sdev->siblings);
465 list_del(&sdev->same_target_siblings);
466 list_del(&sdev->starved_entry);
467 spin_unlock_irqrestore(sdev->host->host_lock, flags);
468
469 cancel_work_sync(&sdev->event_work);
470
471 list_for_each_safe(this, tmp, &sdev->event_list) {
472 struct scsi_event *evt;
473
474 evt = list_entry(this, struct scsi_event, node);
475 list_del(&evt->node);
476 kfree(evt);
477 }
478
479 blk_put_queue(sdev->request_queue);
480
481 sdev->request_queue = NULL;
482
483 sbitmap_free(sdev->budget_map);
484 kfree(sdev->budget_map);
485
486 mutex_lock(&sdev->inquiry_mutex);
487 vpd_pg0 = rcu_replace_pointer(sdev->vpd_pg0, vpd_pg0,
488 lockdep_is_held(&sdev->inquiry_mutex));
489 vpd_pg80 = rcu_replace_pointer(sdev->vpd_pg80, vpd_pg80,
490 lockdep_is_held(&sdev->inquiry_mutex));
491 vpd_pg83 = rcu_replace_pointer(sdev->vpd_pg83, vpd_pg83,
492 lockdep_is_held(&sdev->inquiry_mutex));
493 vpd_pg89 = rcu_replace_pointer(sdev->vpd_pg89, vpd_pg89,
494 lockdep_is_held(&sdev->inquiry_mutex));
495 mutex_unlock(&sdev->inquiry_mutex);
496
497 if (vpd_pg0)
498 kfree_rcu(vpd_pg0, rcu);
499 if (vpd_pg83)
500 kfree_rcu(vpd_pg83, rcu);
501 if (vpd_pg80)
502 kfree_rcu(vpd_pg80, rcu);
503 if (vpd_pg89)
504 kfree_rcu(vpd_pg89, rcu);
505 kfree(sdev->inquiry);
506 kfree(sdev);
507
508 if (parent)
509 put_device(parent);
510 module_put(mod);
511}
512
513static void scsi_device_dev_release(struct device *dev)
514{
515 struct scsi_device *sdp = to_scsi_device(dev);
516
517
518 if (!try_module_get(sdp->host->hostt->module))
519 sdp->host->hostt->module = NULL;
520
521 execute_in_process_context(scsi_device_dev_release_usercontext,
522 &sdp->ew);
523}
524
525static struct class sdev_class = {
526 .name = "scsi_device",
527 .dev_release = scsi_device_cls_release,
528};
529
530
531static int scsi_bus_match(struct device *dev, struct device_driver *gendrv)
532{
533 struct scsi_device *sdp;
534
535 if (dev->type != &scsi_dev_type)
536 return 0;
537
538 sdp = to_scsi_device(dev);
539 if (sdp->no_uld_attach)
540 return 0;
541 return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0;
542}
543
544static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
545{
546 struct scsi_device *sdev;
547
548 if (dev->type != &scsi_dev_type)
549 return 0;
550
551 sdev = to_scsi_device(dev);
552
553 add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type);
554 return 0;
555}
556
557struct bus_type scsi_bus_type = {
558 .name = "scsi",
559 .match = scsi_bus_match,
560 .uevent = scsi_bus_uevent,
561#ifdef CONFIG_PM
562 .pm = &scsi_bus_pm_ops,
563#endif
564};
565EXPORT_SYMBOL_GPL(scsi_bus_type);
566
567int scsi_sysfs_register(void)
568{
569 int error;
570
571 error = bus_register(&scsi_bus_type);
572 if (!error) {
573 error = class_register(&sdev_class);
574 if (error)
575 bus_unregister(&scsi_bus_type);
576 }
577
578 return error;
579}
580
581void scsi_sysfs_unregister(void)
582{
583 class_unregister(&sdev_class);
584 bus_unregister(&scsi_bus_type);
585}
586
587
588
589
590
591#define sdev_show_function(field, format_string) \
592static ssize_t \
593sdev_show_##field (struct device *dev, struct device_attribute *attr, \
594 char *buf) \
595{ \
596 struct scsi_device *sdev; \
597 sdev = to_scsi_device(dev); \
598 return snprintf (buf, 20, format_string, sdev->field); \
599} \
600
601
602
603
604
605#define sdev_rd_attr(field, format_string) \
606 sdev_show_function(field, format_string) \
607static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL);
608
609
610
611
612
613
614#define sdev_rw_attr(field, format_string) \
615 sdev_show_function(field, format_string) \
616 \
617static ssize_t \
618sdev_store_##field (struct device *dev, struct device_attribute *attr, \
619 const char *buf, size_t count) \
620{ \
621 struct scsi_device *sdev; \
622 sdev = to_scsi_device(dev); \
623 sscanf (buf, format_string, &sdev->field); \
624 return count; \
625} \
626static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
627
628
629
630#if 0
631
632
633
634
635#define sdev_rw_attr_bit(field) \
636 sdev_show_function(field, "%d\n") \
637 \
638static ssize_t \
639sdev_store_##field (struct device *dev, struct device_attribute *attr, \
640 const char *buf, size_t count) \
641{ \
642 int ret; \
643 struct scsi_device *sdev; \
644 ret = scsi_sdev_check_buf_bit(buf); \
645 if (ret >= 0) { \
646 sdev = to_scsi_device(dev); \
647 sdev->field = ret; \
648 ret = count; \
649 } \
650 return ret; \
651} \
652static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
653
654
655
656
657
658static int scsi_sdev_check_buf_bit(const char *buf)
659{
660 if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
661 if (buf[0] == '1')
662 return 1;
663 else if (buf[0] == '0')
664 return 0;
665 else
666 return -EINVAL;
667 } else
668 return -EINVAL;
669}
670#endif
671
672
673
674sdev_rd_attr (type, "%d\n");
675sdev_rd_attr (scsi_level, "%d\n");
676sdev_rd_attr (vendor, "%.8s\n");
677sdev_rd_attr (model, "%.16s\n");
678sdev_rd_attr (rev, "%.4s\n");
679
680static ssize_t
681sdev_show_device_busy(struct device *dev, struct device_attribute *attr,
682 char *buf)
683{
684 struct scsi_device *sdev = to_scsi_device(dev);
685 return snprintf(buf, 20, "%d\n", scsi_device_busy(sdev));
686}
687static DEVICE_ATTR(device_busy, S_IRUGO, sdev_show_device_busy, NULL);
688
689static ssize_t
690sdev_show_device_blocked(struct device *dev, struct device_attribute *attr,
691 char *buf)
692{
693 struct scsi_device *sdev = to_scsi_device(dev);
694 return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_blocked));
695}
696static DEVICE_ATTR(device_blocked, S_IRUGO, sdev_show_device_blocked, NULL);
697
698static ssize_t
699sdev_show_unpriv_sgio (struct device *dev, struct device_attribute *attr, char *buf)
700{
701 struct scsi_device *sdev;
702 int bit;
703
704 sdev = to_scsi_device(dev);
705 bit = test_bit(QUEUE_FLAG_UNPRIV_SGIO, &sdev->request_queue->queue_flags);
706 return snprintf(buf, 20, "%d\n", bit);
707}
708
709static ssize_t
710sdev_store_unpriv_sgio (struct device *dev, struct device_attribute *attr,
711 const char *buf, size_t count)
712{
713 struct scsi_device *sdev;
714 struct request_queue *q;
715 int err;
716 unsigned long val;
717
718 if (!capable(CAP_SYS_ADMIN))
719 return -EPERM;
720
721 sdev = to_scsi_device(dev);
722 q = sdev->request_queue;
723 err = kstrtoul(buf, 10, &val);
724 if (err)
725 return -EINVAL;
726
727 if (val)
728 blk_queue_flag_set(QUEUE_FLAG_UNPRIV_SGIO, q);
729 else
730 blk_queue_flag_clear(QUEUE_FLAG_UNPRIV_SGIO, q);
731 return count;
732}
733static DEVICE_ATTR(unpriv_sgio, S_IRUGO | S_IWUSR, sdev_show_unpriv_sgio, sdev_store_unpriv_sgio);
734
735
736
737
738static ssize_t
739sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf)
740{
741 struct scsi_device *sdev;
742 sdev = to_scsi_device(dev);
743 return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ);
744}
745
746static ssize_t
747sdev_store_timeout (struct device *dev, struct device_attribute *attr,
748 const char *buf, size_t count)
749{
750 struct scsi_device *sdev;
751 int timeout;
752 sdev = to_scsi_device(dev);
753 sscanf (buf, "%d\n", &timeout);
754 blk_queue_rq_timeout(sdev->request_queue, timeout * HZ);
755 return count;
756}
757static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout);
758
759static ssize_t
760sdev_show_eh_timeout(struct device *dev, struct device_attribute *attr, char *buf)
761{
762 struct scsi_device *sdev;
763 sdev = to_scsi_device(dev);
764 return snprintf(buf, 20, "%u\n", sdev->eh_timeout / HZ);
765}
766
767static ssize_t
768sdev_store_eh_timeout(struct device *dev, struct device_attribute *attr,
769 const char *buf, size_t count)
770{
771 struct scsi_device *sdev;
772 unsigned int eh_timeout;
773 int err;
774
775 if (!capable(CAP_SYS_ADMIN))
776 return -EACCES;
777
778 sdev = to_scsi_device(dev);
779 err = kstrtouint(buf, 10, &eh_timeout);
780 if (err)
781 return err;
782 sdev->eh_timeout = eh_timeout * HZ;
783
784 return count;
785}
786static DEVICE_ATTR(eh_timeout, S_IRUGO | S_IWUSR, sdev_show_eh_timeout, sdev_store_eh_timeout);
787
788static ssize_t
789store_rescan_field (struct device *dev, struct device_attribute *attr,
790 const char *buf, size_t count)
791{
792 scsi_rescan_device(dev);
793 return count;
794}
795static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field);
796
797static ssize_t
798sdev_store_delete(struct device *dev, struct device_attribute *attr,
799 const char *buf, size_t count)
800{
801 struct kernfs_node *kn;
802 struct scsi_device *sdev = to_scsi_device(dev);
803
804
805
806
807
808 if (scsi_device_get(sdev))
809 return -ENODEV;
810
811 kn = sysfs_break_active_protection(&dev->kobj, &attr->attr);
812 WARN_ON_ONCE(!kn);
813
814
815
816
817
818
819
820
821
822
823 device_remove_file(dev, attr);
824 scsi_remove_device(sdev);
825 if (kn)
826 sysfs_unbreak_active_protection(kn);
827 scsi_device_put(sdev);
828 return count;
829};
830static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete);
831
832static ssize_t
833store_state_field(struct device *dev, struct device_attribute *attr,
834 const char *buf, size_t count)
835{
836 int i, ret;
837 struct scsi_device *sdev = to_scsi_device(dev);
838 enum scsi_device_state state = 0;
839
840 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
841 const int len = strlen(sdev_states[i].name);
842 if (strncmp(sdev_states[i].name, buf, len) == 0 &&
843 buf[len] == '\n') {
844 state = sdev_states[i].value;
845 break;
846 }
847 }
848 if (!state)
849 return -EINVAL;
850
851 mutex_lock(&sdev->state_mutex);
852 ret = scsi_device_set_state(sdev, state);
853
854
855
856
857
858
859
860
861 if (ret == 0 && state == SDEV_RUNNING) {
862 blk_mq_run_hw_queues(sdev->request_queue, true);
863 scsi_rescan_device(dev);
864 }
865 mutex_unlock(&sdev->state_mutex);
866
867 return ret == 0 ? count : -EINVAL;
868}
869
870static ssize_t
871show_state_field(struct device *dev, struct device_attribute *attr, char *buf)
872{
873 struct scsi_device *sdev = to_scsi_device(dev);
874 const char *name = scsi_device_state_name(sdev->sdev_state);
875
876 if (!name)
877 return -EINVAL;
878
879 return snprintf(buf, 20, "%s\n", name);
880}
881
882static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field);
883
884static ssize_t
885show_queue_type_field(struct device *dev, struct device_attribute *attr,
886 char *buf)
887{
888 struct scsi_device *sdev = to_scsi_device(dev);
889 const char *name = "none";
890
891 if (sdev->simple_tags)
892 name = "simple";
893
894 return snprintf(buf, 20, "%s\n", name);
895}
896
897static ssize_t
898store_queue_type_field(struct device *dev, struct device_attribute *attr,
899 const char *buf, size_t count)
900{
901 struct scsi_device *sdev = to_scsi_device(dev);
902
903 if (!sdev->tagged_supported)
904 return -EINVAL;
905
906 sdev_printk(KERN_INFO, sdev,
907 "ignoring write to deprecated queue_type attribute");
908 return count;
909}
910
911static DEVICE_ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field,
912 store_queue_type_field);
913
914#define sdev_vpd_pg_attr(_page) \
915static ssize_t \
916show_vpd_##_page(struct file *filp, struct kobject *kobj, \
917 struct bin_attribute *bin_attr, \
918 char *buf, loff_t off, size_t count) \
919{ \
920 struct device *dev = kobj_to_dev(kobj); \
921 struct scsi_device *sdev = to_scsi_device(dev); \
922 struct scsi_vpd *vpd_page; \
923 int ret = -EINVAL; \
924 \
925 rcu_read_lock(); \
926 vpd_page = rcu_dereference(sdev->vpd_##_page); \
927 if (vpd_page) \
928 ret = memory_read_from_buffer(buf, count, &off, \
929 vpd_page->data, vpd_page->len); \
930 rcu_read_unlock(); \
931 return ret; \
932} \
933static struct bin_attribute dev_attr_vpd_##_page = { \
934 .attr = {.name = __stringify(vpd_##_page), .mode = S_IRUGO }, \
935 .size = 0, \
936 .read = show_vpd_##_page, \
937};
938
939sdev_vpd_pg_attr(pg83);
940sdev_vpd_pg_attr(pg80);
941sdev_vpd_pg_attr(pg89);
942sdev_vpd_pg_attr(pg0);
943
944static ssize_t show_inquiry(struct file *filep, struct kobject *kobj,
945 struct bin_attribute *bin_attr,
946 char *buf, loff_t off, size_t count)
947{
948 struct device *dev = kobj_to_dev(kobj);
949 struct scsi_device *sdev = to_scsi_device(dev);
950
951 if (!sdev->inquiry)
952 return -EINVAL;
953
954 return memory_read_from_buffer(buf, count, &off, sdev->inquiry,
955 sdev->inquiry_len);
956}
957
958static struct bin_attribute dev_attr_inquiry = {
959 .attr = {
960 .name = "inquiry",
961 .mode = S_IRUGO,
962 },
963 .size = 0,
964 .read = show_inquiry,
965};
966
967static ssize_t
968show_iostat_counterbits(struct device *dev, struct device_attribute *attr,
969 char *buf)
970{
971 return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8);
972}
973
974static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL);
975
976#define show_sdev_iostat(field) \
977static ssize_t \
978show_iostat_##field(struct device *dev, struct device_attribute *attr, \
979 char *buf) \
980{ \
981 struct scsi_device *sdev = to_scsi_device(dev); \
982 unsigned long long count = atomic_read(&sdev->field); \
983 return snprintf(buf, 20, "0x%llx\n", count); \
984} \
985static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL)
986
987show_sdev_iostat(iorequest_cnt);
988show_sdev_iostat(iodone_cnt);
989show_sdev_iostat(ioerr_cnt);
990
991static ssize_t
992sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
993{
994 struct scsi_device *sdev;
995 sdev = to_scsi_device(dev);
996 return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type);
997}
998static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL);
999
1000#define DECLARE_EVT_SHOW(name, Cap_name) \
1001static ssize_t \
1002sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \
1003 char *buf) \
1004{ \
1005 struct scsi_device *sdev = to_scsi_device(dev); \
1006 int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\
1007 return snprintf(buf, 20, "%d\n", val); \
1008}
1009
1010#define DECLARE_EVT_STORE(name, Cap_name) \
1011static ssize_t \
1012sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\
1013 const char *buf, size_t count) \
1014{ \
1015 struct scsi_device *sdev = to_scsi_device(dev); \
1016 int val = simple_strtoul(buf, NULL, 0); \
1017 if (val == 0) \
1018 clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
1019 else if (val == 1) \
1020 set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
1021 else \
1022 return -EINVAL; \
1023 return count; \
1024}
1025
1026#define DECLARE_EVT(name, Cap_name) \
1027 DECLARE_EVT_SHOW(name, Cap_name) \
1028 DECLARE_EVT_STORE(name, Cap_name) \
1029 static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \
1030 sdev_store_evt_##name);
1031#define REF_EVT(name) &dev_attr_evt_##name.attr
1032
1033DECLARE_EVT(media_change, MEDIA_CHANGE)
1034DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED)
1035DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED)
1036DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED)
1037DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED)
1038DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED)
1039
1040static ssize_t
1041sdev_store_queue_depth(struct device *dev, struct device_attribute *attr,
1042 const char *buf, size_t count)
1043{
1044 int depth, retval;
1045 struct scsi_device *sdev = to_scsi_device(dev);
1046 struct scsi_host_template *sht = sdev->host->hostt;
1047
1048 if (!sht->change_queue_depth)
1049 return -EINVAL;
1050
1051 depth = simple_strtoul(buf, NULL, 0);
1052
1053 if (depth < 1 || depth > sdev->host->can_queue)
1054 return -EINVAL;
1055
1056 retval = sht->change_queue_depth(sdev, depth);
1057 if (retval < 0)
1058 return retval;
1059
1060 sdev->max_queue_depth = sdev->queue_depth;
1061
1062 return count;
1063}
1064sdev_show_function(queue_depth, "%d\n");
1065
1066static DEVICE_ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth,
1067 sdev_store_queue_depth);
1068
1069static ssize_t
1070sdev_show_wwid(struct device *dev, struct device_attribute *attr,
1071 char *buf)
1072{
1073 struct scsi_device *sdev = to_scsi_device(dev);
1074 ssize_t count;
1075
1076 count = scsi_vpd_lun_id(sdev, buf, PAGE_SIZE);
1077 if (count > 0) {
1078 buf[count] = '\n';
1079 count++;
1080 }
1081 return count;
1082}
1083static DEVICE_ATTR(wwid, S_IRUGO, sdev_show_wwid, NULL);
1084
1085#define BLIST_FLAG_NAME(name) \
1086 [const_ilog2((__force __u64)BLIST_##name)] = #name
1087static const char *const sdev_bflags_name[] = {
1088#include "scsi_devinfo_tbl.c"
1089};
1090#undef BLIST_FLAG_NAME
1091
1092static ssize_t
1093sdev_show_blacklist(struct device *dev, struct device_attribute *attr,
1094 char *buf)
1095{
1096 struct scsi_device *sdev = to_scsi_device(dev);
1097 int i;
1098 ssize_t len = 0;
1099
1100 for (i = 0; i < sizeof(sdev->sdev_bflags) * BITS_PER_BYTE; i++) {
1101 const char *name = NULL;
1102
1103 if (!(sdev->sdev_bflags & (__force blist_flags_t)BIT(i)))
1104 continue;
1105 if (i < ARRAY_SIZE(sdev_bflags_name) && sdev_bflags_name[i])
1106 name = sdev_bflags_name[i];
1107
1108 if (name)
1109 len += scnprintf(buf + len, PAGE_SIZE - len,
1110 "%s%s", len ? " " : "", name);
1111 else
1112 len += scnprintf(buf + len, PAGE_SIZE - len,
1113 "%sINVALID_BIT(%d)", len ? " " : "", i);
1114 }
1115 if (len)
1116 len += scnprintf(buf + len, PAGE_SIZE - len, "\n");
1117 return len;
1118}
1119static DEVICE_ATTR(blacklist, S_IRUGO, sdev_show_blacklist, NULL);
1120
1121#ifdef CONFIG_SCSI_DH
1122static ssize_t
1123sdev_show_dh_state(struct device *dev, struct device_attribute *attr,
1124 char *buf)
1125{
1126 struct scsi_device *sdev = to_scsi_device(dev);
1127
1128 if (!sdev->handler)
1129 return snprintf(buf, 20, "detached\n");
1130
1131 return snprintf(buf, 20, "%s\n", sdev->handler->name);
1132}
1133
1134static ssize_t
1135sdev_store_dh_state(struct device *dev, struct device_attribute *attr,
1136 const char *buf, size_t count)
1137{
1138 struct scsi_device *sdev = to_scsi_device(dev);
1139 int err = -EINVAL;
1140
1141 if (sdev->sdev_state == SDEV_CANCEL ||
1142 sdev->sdev_state == SDEV_DEL)
1143 return -ENODEV;
1144
1145 if (!sdev->handler) {
1146
1147
1148
1149 err = scsi_dh_attach(sdev->request_queue, buf);
1150 } else if (!strncmp(buf, "activate", 8)) {
1151
1152
1153
1154 if (sdev->handler->activate)
1155 err = sdev->handler->activate(sdev, NULL, NULL);
1156 else
1157 err = 0;
1158 } else if (!strncmp(buf, "detach", 6)) {
1159
1160
1161
1162 sdev_printk(KERN_WARNING, sdev,
1163 "can't detach handler %s.\n",
1164 sdev->handler->name);
1165 err = -EINVAL;
1166 }
1167
1168 return err < 0 ? err : count;
1169}
1170
1171static DEVICE_ATTR(dh_state, S_IRUGO | S_IWUSR, sdev_show_dh_state,
1172 sdev_store_dh_state);
1173
1174static ssize_t
1175sdev_show_access_state(struct device *dev,
1176 struct device_attribute *attr,
1177 char *buf)
1178{
1179 struct scsi_device *sdev = to_scsi_device(dev);
1180 unsigned char access_state;
1181 const char *access_state_name;
1182
1183 if (!sdev->handler)
1184 return -EINVAL;
1185
1186 access_state = (sdev->access_state & SCSI_ACCESS_STATE_MASK);
1187 access_state_name = scsi_access_state_name(access_state);
1188
1189 return sprintf(buf, "%s\n",
1190 access_state_name ? access_state_name : "unknown");
1191}
1192static DEVICE_ATTR(access_state, S_IRUGO, sdev_show_access_state, NULL);
1193
1194static ssize_t
1195sdev_show_preferred_path(struct device *dev,
1196 struct device_attribute *attr,
1197 char *buf)
1198{
1199 struct scsi_device *sdev = to_scsi_device(dev);
1200
1201 if (!sdev->handler)
1202 return -EINVAL;
1203
1204 if (sdev->access_state & SCSI_ACCESS_STATE_PREFERRED)
1205 return sprintf(buf, "1\n");
1206 else
1207 return sprintf(buf, "0\n");
1208}
1209static DEVICE_ATTR(preferred_path, S_IRUGO, sdev_show_preferred_path, NULL);
1210#endif
1211
1212static ssize_t
1213sdev_show_queue_ramp_up_period(struct device *dev,
1214 struct device_attribute *attr,
1215 char *buf)
1216{
1217 struct scsi_device *sdev;
1218 sdev = to_scsi_device(dev);
1219 return snprintf(buf, 20, "%u\n",
1220 jiffies_to_msecs(sdev->queue_ramp_up_period));
1221}
1222
1223static ssize_t
1224sdev_store_queue_ramp_up_period(struct device *dev,
1225 struct device_attribute *attr,
1226 const char *buf, size_t count)
1227{
1228 struct scsi_device *sdev = to_scsi_device(dev);
1229 unsigned int period;
1230
1231 if (kstrtouint(buf, 10, &period))
1232 return -EINVAL;
1233
1234 sdev->queue_ramp_up_period = msecs_to_jiffies(period);
1235 return count;
1236}
1237
1238static DEVICE_ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR,
1239 sdev_show_queue_ramp_up_period,
1240 sdev_store_queue_ramp_up_period);
1241
1242static umode_t scsi_sdev_attr_is_visible(struct kobject *kobj,
1243 struct attribute *attr, int i)
1244{
1245 struct device *dev = kobj_to_dev(kobj);
1246 struct scsi_device *sdev = to_scsi_device(dev);
1247
1248
1249 if (attr == &dev_attr_queue_depth.attr &&
1250 !sdev->host->hostt->change_queue_depth)
1251 return S_IRUGO;
1252
1253 if (attr == &dev_attr_queue_ramp_up_period.attr &&
1254 !sdev->host->hostt->change_queue_depth)
1255 return 0;
1256
1257#ifdef CONFIG_SCSI_DH
1258 if (attr == &dev_attr_access_state.attr &&
1259 !sdev->handler)
1260 return 0;
1261 if (attr == &dev_attr_preferred_path.attr &&
1262 !sdev->handler)
1263 return 0;
1264#endif
1265 return attr->mode;
1266}
1267
1268static umode_t scsi_sdev_bin_attr_is_visible(struct kobject *kobj,
1269 struct bin_attribute *attr, int i)
1270{
1271 struct device *dev = kobj_to_dev(kobj);
1272 struct scsi_device *sdev = to_scsi_device(dev);
1273
1274
1275 if (attr == &dev_attr_vpd_pg0 && !sdev->vpd_pg0)
1276 return 0;
1277
1278 if (attr == &dev_attr_vpd_pg80 && !sdev->vpd_pg80)
1279 return 0;
1280
1281 if (attr == &dev_attr_vpd_pg83 && !sdev->vpd_pg83)
1282 return 0;
1283
1284 if (attr == &dev_attr_vpd_pg89 && !sdev->vpd_pg89)
1285 return 0;
1286
1287 return S_IRUGO;
1288}
1289
1290
1291static struct attribute *scsi_sdev_attrs[] = {
1292 &dev_attr_device_blocked.attr,
1293 &dev_attr_type.attr,
1294 &dev_attr_scsi_level.attr,
1295 &dev_attr_device_busy.attr,
1296 &dev_attr_vendor.attr,
1297 &dev_attr_model.attr,
1298 &dev_attr_rev.attr,
1299 &dev_attr_rescan.attr,
1300 &dev_attr_delete.attr,
1301 &dev_attr_state.attr,
1302 &dev_attr_unpriv_sgio.attr,
1303 &dev_attr_timeout.attr,
1304 &dev_attr_eh_timeout.attr,
1305 &dev_attr_iocounterbits.attr,
1306 &dev_attr_iorequest_cnt.attr,
1307 &dev_attr_iodone_cnt.attr,
1308 &dev_attr_ioerr_cnt.attr,
1309 &dev_attr_modalias.attr,
1310 &dev_attr_queue_depth.attr,
1311 &dev_attr_queue_type.attr,
1312 &dev_attr_wwid.attr,
1313 &dev_attr_blacklist.attr,
1314#ifdef CONFIG_SCSI_DH
1315 &dev_attr_dh_state.attr,
1316 &dev_attr_access_state.attr,
1317 &dev_attr_preferred_path.attr,
1318#endif
1319 &dev_attr_queue_ramp_up_period.attr,
1320 REF_EVT(media_change),
1321 REF_EVT(inquiry_change_reported),
1322 REF_EVT(capacity_change_reported),
1323 REF_EVT(soft_threshold_reached),
1324 REF_EVT(mode_parameter_change_reported),
1325 REF_EVT(lun_change_reported),
1326 NULL
1327};
1328
1329static struct bin_attribute *scsi_sdev_bin_attrs[] = {
1330 &dev_attr_vpd_pg0,
1331 &dev_attr_vpd_pg83,
1332 &dev_attr_vpd_pg80,
1333 &dev_attr_vpd_pg89,
1334 &dev_attr_inquiry,
1335 NULL
1336};
1337static struct attribute_group scsi_sdev_attr_group = {
1338 .attrs = scsi_sdev_attrs,
1339 .bin_attrs = scsi_sdev_bin_attrs,
1340 .is_visible = scsi_sdev_attr_is_visible,
1341 .is_bin_visible = scsi_sdev_bin_attr_is_visible,
1342};
1343
1344static const struct attribute_group *scsi_sdev_attr_groups[] = {
1345 &scsi_sdev_attr_group,
1346 NULL
1347};
1348
1349static int scsi_target_add(struct scsi_target *starget)
1350{
1351 int error;
1352
1353 if (starget->state != STARGET_CREATED)
1354 return 0;
1355
1356 error = device_add(&starget->dev);
1357 if (error) {
1358 dev_err(&starget->dev, "target device_add failed, error %d\n", error);
1359 return error;
1360 }
1361 transport_add_device(&starget->dev);
1362 starget->state = STARGET_RUNNING;
1363
1364 pm_runtime_set_active(&starget->dev);
1365 pm_runtime_enable(&starget->dev);
1366 device_enable_async_suspend(&starget->dev);
1367
1368 return 0;
1369}
1370
1371
1372
1373
1374
1375
1376
1377
1378int scsi_sysfs_add_sdev(struct scsi_device *sdev)
1379{
1380 int error, i;
1381 struct request_queue *rq = sdev->request_queue;
1382 struct scsi_target *starget = sdev->sdev_target;
1383
1384 error = scsi_target_add(starget);
1385 if (error)
1386 return error;
1387
1388 transport_configure_device(&starget->dev);
1389
1390 device_enable_async_suspend(&sdev->sdev_gendev);
1391 scsi_autopm_get_target(starget);
1392 pm_runtime_set_active(&sdev->sdev_gendev);
1393 pm_runtime_forbid(&sdev->sdev_gendev);
1394 pm_runtime_enable(&sdev->sdev_gendev);
1395 scsi_autopm_put_target(starget);
1396
1397 scsi_autopm_get_device(sdev);
1398
1399 scsi_dh_add_device(sdev);
1400
1401 error = device_add(&sdev->sdev_gendev);
1402 if (error) {
1403 sdev_printk(KERN_INFO, sdev,
1404 "failed to add device: %d\n", error);
1405 return error;
1406 }
1407
1408 device_enable_async_suspend(&sdev->sdev_dev);
1409 error = device_add(&sdev->sdev_dev);
1410 if (error) {
1411 sdev_printk(KERN_INFO, sdev,
1412 "failed to add class device: %d\n", error);
1413 device_del(&sdev->sdev_gendev);
1414 return error;
1415 }
1416 transport_add_device(&sdev->sdev_gendev);
1417 sdev->is_visible = 1;
1418
1419 error = bsg_scsi_register_queue(rq, &sdev->sdev_gendev);
1420 if (error)
1421
1422
1423 sdev_printk(KERN_INFO, sdev,
1424 "Failed to register bsg queue, errno=%d\n", error);
1425
1426
1427 if (sdev->host->hostt->sdev_attrs) {
1428 for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) {
1429 error = device_create_file(&sdev->sdev_gendev,
1430 sdev->host->hostt->sdev_attrs[i]);
1431 if (error)
1432 return error;
1433 }
1434 }
1435
1436 if (sdev->host->hostt->sdev_groups) {
1437 error = sysfs_create_groups(&sdev->sdev_gendev.kobj,
1438 sdev->host->hostt->sdev_groups);
1439 if (error)
1440 return error;
1441 }
1442
1443 scsi_autopm_put_device(sdev);
1444 return error;
1445}
1446
1447void __scsi_remove_device(struct scsi_device *sdev)
1448{
1449 struct device *dev = &sdev->sdev_gendev;
1450 int res;
1451
1452
1453
1454
1455
1456
1457 if (sdev->sdev_state == SDEV_DEL)
1458 return;
1459
1460 if (sdev->is_visible) {
1461
1462
1463
1464
1465 mutex_lock(&sdev->state_mutex);
1466
1467
1468
1469
1470
1471 res = scsi_device_set_state(sdev, SDEV_CANCEL);
1472 if (res != 0) {
1473 res = scsi_device_set_state(sdev, SDEV_DEL);
1474 if (res == 0)
1475 scsi_start_queue(sdev);
1476 }
1477 mutex_unlock(&sdev->state_mutex);
1478
1479 if (res != 0)
1480 return;
1481
1482 if (sdev->host->hostt->sdev_groups)
1483 sysfs_remove_groups(&sdev->sdev_gendev.kobj,
1484 sdev->host->hostt->sdev_groups);
1485
1486 bsg_unregister_queue(sdev->request_queue);
1487 device_unregister(&sdev->sdev_dev);
1488 transport_remove_device(dev);
1489 device_del(dev);
1490 } else
1491 put_device(&sdev->sdev_dev);
1492
1493
1494
1495
1496
1497
1498 mutex_lock(&sdev->state_mutex);
1499 scsi_device_set_state(sdev, SDEV_DEL);
1500 mutex_unlock(&sdev->state_mutex);
1501
1502 blk_cleanup_queue(sdev->request_queue);
1503 cancel_work_sync(&sdev->requeue_work);
1504
1505 if (sdev->host->hostt->slave_destroy)
1506 sdev->host->hostt->slave_destroy(sdev);
1507 transport_destroy_device(dev);
1508
1509
1510
1511
1512
1513
1514 scsi_target_reap(scsi_target(sdev));
1515
1516 put_device(dev);
1517}
1518
1519
1520
1521
1522
1523void scsi_remove_device(struct scsi_device *sdev)
1524{
1525 struct Scsi_Host *shost = sdev->host;
1526
1527 mutex_lock(&shost->scan_mutex);
1528 __scsi_remove_device(sdev);
1529 mutex_unlock(&shost->scan_mutex);
1530}
1531EXPORT_SYMBOL(scsi_remove_device);
1532
1533static void __scsi_remove_target(struct scsi_target *starget)
1534{
1535 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1536 unsigned long flags;
1537 struct scsi_device *sdev;
1538
1539 spin_lock_irqsave(shost->host_lock, flags);
1540 restart:
1541 list_for_each_entry(sdev, &shost->__devices, siblings) {
1542
1543
1544
1545
1546
1547
1548 if (sdev->channel != starget->channel ||
1549 sdev->id != starget->id)
1550 continue;
1551 if (sdev->sdev_state == SDEV_DEL ||
1552 sdev->sdev_state == SDEV_CANCEL ||
1553 !get_device(&sdev->sdev_gendev))
1554 continue;
1555 spin_unlock_irqrestore(shost->host_lock, flags);
1556 scsi_remove_device(sdev);
1557 put_device(&sdev->sdev_gendev);
1558 spin_lock_irqsave(shost->host_lock, flags);
1559 goto restart;
1560 }
1561 spin_unlock_irqrestore(shost->host_lock, flags);
1562}
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572void scsi_remove_target(struct device *dev)
1573{
1574 struct Scsi_Host *shost = dev_to_shost(dev->parent);
1575 struct scsi_target *starget;
1576 unsigned long flags;
1577
1578restart:
1579 spin_lock_irqsave(shost->host_lock, flags);
1580 list_for_each_entry(starget, &shost->__targets, siblings) {
1581 if (starget->state == STARGET_DEL ||
1582 starget->state == STARGET_REMOVE ||
1583 starget->state == STARGET_CREATED_REMOVE)
1584 continue;
1585 if (starget->dev.parent == dev || &starget->dev == dev) {
1586 kref_get(&starget->reap_ref);
1587 if (starget->state == STARGET_CREATED)
1588 starget->state = STARGET_CREATED_REMOVE;
1589 else
1590 starget->state = STARGET_REMOVE;
1591 spin_unlock_irqrestore(shost->host_lock, flags);
1592 __scsi_remove_target(starget);
1593 scsi_target_reap(starget);
1594 goto restart;
1595 }
1596 }
1597 spin_unlock_irqrestore(shost->host_lock, flags);
1598}
1599EXPORT_SYMBOL(scsi_remove_target);
1600
1601int scsi_register_driver(struct device_driver *drv)
1602{
1603 drv->bus = &scsi_bus_type;
1604
1605 return driver_register(drv);
1606}
1607EXPORT_SYMBOL(scsi_register_driver);
1608
1609int scsi_register_interface(struct class_interface *intf)
1610{
1611 intf->class = &sdev_class;
1612
1613 return class_interface_register(intf);
1614}
1615EXPORT_SYMBOL(scsi_register_interface);
1616
1617
1618
1619
1620
1621int scsi_sysfs_add_host(struct Scsi_Host *shost)
1622{
1623 int error, i;
1624
1625
1626 if (shost->hostt->shost_attrs) {
1627 for (i = 0; shost->hostt->shost_attrs[i]; i++) {
1628 error = device_create_file(&shost->shost_dev,
1629 shost->hostt->shost_attrs[i]);
1630 if (error)
1631 return error;
1632 }
1633 }
1634
1635 transport_register_device(&shost->shost_gendev);
1636 transport_configure_device(&shost->shost_gendev);
1637 return 0;
1638}
1639
1640static struct device_type scsi_dev_type = {
1641 .name = "scsi_device",
1642 .release = scsi_device_dev_release,
1643 .groups = scsi_sdev_attr_groups,
1644};
1645
1646void scsi_sysfs_device_initialize(struct scsi_device *sdev)
1647{
1648 unsigned long flags;
1649 struct Scsi_Host *shost = sdev->host;
1650 struct scsi_target *starget = sdev->sdev_target;
1651
1652 device_initialize(&sdev->sdev_gendev);
1653 sdev->sdev_gendev.bus = &scsi_bus_type;
1654 sdev->sdev_gendev.type = &scsi_dev_type;
1655 dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%llu",
1656 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1657
1658 device_initialize(&sdev->sdev_dev);
1659 sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev);
1660 sdev->sdev_dev.class = &sdev_class;
1661 dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%llu",
1662 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1663
1664
1665
1666
1667
1668
1669
1670 sdev->scsi_level = starget->scsi_level;
1671 if (sdev->scsi_level <= SCSI_2 &&
1672 sdev->scsi_level != SCSI_UNKNOWN &&
1673 !shost->no_scsi2_lun_in_cdb)
1674 sdev->lun_in_cdb = 1;
1675
1676 transport_setup_device(&sdev->sdev_gendev);
1677 spin_lock_irqsave(shost->host_lock, flags);
1678 list_add_tail(&sdev->same_target_siblings, &starget->devices);
1679 list_add_tail(&sdev->siblings, &shost->__devices);
1680 spin_unlock_irqrestore(shost->host_lock, flags);
1681
1682
1683
1684
1685
1686 kref_get(&starget->reap_ref);
1687}
1688
1689int scsi_is_sdev_device(const struct device *dev)
1690{
1691 return dev->type == &scsi_dev_type;
1692}
1693EXPORT_SYMBOL(scsi_is_sdev_device);
1694
1695
1696
1697struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, };
1698