1
2
3
4
5
6
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_dh.h>
21#include <scsi/scsi_transport.h>
22#include <scsi/scsi_driver.h>
23#include <scsi/scsi_devinfo.h>
24
25#include "scsi_priv.h"
26#include "scsi_logging.h"
27
28static struct device_type scsi_dev_type;
29
30static const struct {
31 enum scsi_device_state value;
32 char *name;
33} sdev_states[] = {
34 { SDEV_CREATED, "created" },
35 { SDEV_RUNNING, "running" },
36 { SDEV_CANCEL, "cancel" },
37 { SDEV_DEL, "deleted" },
38 { SDEV_QUIESCE, "quiesce" },
39 { SDEV_OFFLINE, "offline" },
40 { SDEV_TRANSPORT_OFFLINE, "transport-offline" },
41 { SDEV_BLOCK, "blocked" },
42 { SDEV_CREATED_BLOCK, "created-blocked" },
43};
44
45const char *scsi_device_state_name(enum scsi_device_state state)
46{
47 int i;
48 char *name = NULL;
49
50 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
51 if (sdev_states[i].value == state) {
52 name = sdev_states[i].name;
53 break;
54 }
55 }
56 return name;
57}
58
59static const struct {
60 enum scsi_host_state value;
61 char *name;
62} shost_states[] = {
63 { SHOST_CREATED, "created" },
64 { SHOST_RUNNING, "running" },
65 { SHOST_CANCEL, "cancel" },
66 { SHOST_DEL, "deleted" },
67 { SHOST_RECOVERY, "recovery" },
68 { SHOST_CANCEL_RECOVERY, "cancel/recovery" },
69 { SHOST_DEL_RECOVERY, "deleted/recovery", },
70};
71const char *scsi_host_state_name(enum scsi_host_state state)
72{
73 int i;
74 char *name = NULL;
75
76 for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
77 if (shost_states[i].value == state) {
78 name = shost_states[i].name;
79 break;
80 }
81 }
82 return name;
83}
84
85#ifdef CONFIG_SCSI_DH
86static const struct {
87 unsigned char value;
88 char *name;
89} sdev_access_states[] = {
90 { SCSI_ACCESS_STATE_OPTIMAL, "active/optimized" },
91 { SCSI_ACCESS_STATE_ACTIVE, "active/non-optimized" },
92 { SCSI_ACCESS_STATE_STANDBY, "standby" },
93 { SCSI_ACCESS_STATE_UNAVAILABLE, "unavailable" },
94 { SCSI_ACCESS_STATE_LBA, "lba-dependent" },
95 { SCSI_ACCESS_STATE_OFFLINE, "offline" },
96 { SCSI_ACCESS_STATE_TRANSITIONING, "transitioning" },
97};
98
99static const char *scsi_access_state_name(unsigned char state)
100{
101 int i;
102 char *name = NULL;
103
104 for (i = 0; i < ARRAY_SIZE(sdev_access_states); i++) {
105 if (sdev_access_states[i].value == state) {
106 name = sdev_access_states[i].name;
107 break;
108 }
109 }
110 return name;
111}
112#endif
113
114static int check_set(unsigned long long *val, char *src)
115{
116 char *last;
117
118 if (strcmp(src, "-") == 0) {
119 *val = SCAN_WILD_CARD;
120 } else {
121
122
123
124 *val = simple_strtoull(src, &last, 0);
125 if (*last != '\0')
126 return 1;
127 }
128 return 0;
129}
130
131static int scsi_scan(struct Scsi_Host *shost, const char *str)
132{
133 char s1[15], s2[15], s3[17], junk;
134 unsigned long long channel, id, lun;
135 int res;
136
137 res = sscanf(str, "%10s %10s %16s %c", s1, s2, s3, &junk);
138 if (res != 3)
139 return -EINVAL;
140 if (check_set(&channel, s1))
141 return -EINVAL;
142 if (check_set(&id, s2))
143 return -EINVAL;
144 if (check_set(&lun, s3))
145 return -EINVAL;
146 if (shost->transportt->user_scan)
147 res = shost->transportt->user_scan(shost, channel, id, lun);
148 else
149 res = scsi_scan_host_selected(shost, channel, id, lun,
150 SCSI_SCAN_MANUAL);
151 return res;
152}
153
154
155
156
157
158#define shost_show_function(name, field, format_string) \
159static ssize_t \
160show_##name (struct device *dev, struct device_attribute *attr, \
161 char *buf) \
162{ \
163 struct Scsi_Host *shost = class_to_shost(dev); \
164 return snprintf (buf, 20, format_string, shost->field); \
165}
166
167
168
169
170
171#define shost_rd_attr2(name, field, format_string) \
172 shost_show_function(name, field, format_string) \
173static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
174
175#define shost_rd_attr(field, format_string) \
176shost_rd_attr2(field, field, format_string)
177
178
179
180
181
182static ssize_t
183store_scan(struct device *dev, struct device_attribute *attr,
184 const char *buf, size_t count)
185{
186 struct Scsi_Host *shost = class_to_shost(dev);
187 int res;
188
189 res = scsi_scan(shost, buf);
190 if (res == 0)
191 res = count;
192 return res;
193};
194static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan);
195
196static ssize_t
197store_shost_state(struct device *dev, struct device_attribute *attr,
198 const char *buf, size_t count)
199{
200 int i;
201 struct Scsi_Host *shost = class_to_shost(dev);
202 enum scsi_host_state state = 0;
203
204 for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
205 const int len = strlen(shost_states[i].name);
206 if (strncmp(shost_states[i].name, buf, len) == 0 &&
207 buf[len] == '\n') {
208 state = shost_states[i].value;
209 break;
210 }
211 }
212 if (!state)
213 return -EINVAL;
214
215 if (scsi_host_set_state(shost, state))
216 return -EINVAL;
217 return count;
218}
219
220static ssize_t
221show_shost_state(struct device *dev, struct device_attribute *attr, char *buf)
222{
223 struct Scsi_Host *shost = class_to_shost(dev);
224 const char *name = scsi_host_state_name(shost->shost_state);
225
226 if (!name)
227 return -EINVAL;
228
229 return snprintf(buf, 20, "%s\n", name);
230}
231
232
233static struct device_attribute dev_attr_hstate =
234 __ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state);
235
236static ssize_t
237show_shost_mode(unsigned int mode, char *buf)
238{
239 ssize_t len = 0;
240
241 if (mode & MODE_INITIATOR)
242 len = sprintf(buf, "%s", "Initiator");
243
244 if (mode & MODE_TARGET)
245 len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target");
246
247 len += sprintf(buf + len, "\n");
248
249 return len;
250}
251
252static ssize_t
253show_shost_supported_mode(struct device *dev, struct device_attribute *attr,
254 char *buf)
255{
256 struct Scsi_Host *shost = class_to_shost(dev);
257 unsigned int supported_mode = shost->hostt->supported_mode;
258
259 if (supported_mode == MODE_UNKNOWN)
260
261 supported_mode = MODE_INITIATOR;
262
263 return show_shost_mode(supported_mode, buf);
264}
265
266static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL);
267
268static ssize_t
269show_shost_active_mode(struct device *dev,
270 struct device_attribute *attr, char *buf)
271{
272 struct Scsi_Host *shost = class_to_shost(dev);
273
274 if (shost->active_mode == MODE_UNKNOWN)
275 return snprintf(buf, 20, "unknown\n");
276 else
277 return show_shost_mode(shost->active_mode, buf);
278}
279
280static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL);
281
282static int check_reset_type(const char *str)
283{
284 if (sysfs_streq(str, "adapter"))
285 return SCSI_ADAPTER_RESET;
286 else if (sysfs_streq(str, "firmware"))
287 return SCSI_FIRMWARE_RESET;
288 else
289 return 0;
290}
291
292static ssize_t
293store_host_reset(struct device *dev, struct device_attribute *attr,
294 const char *buf, size_t count)
295{
296 struct Scsi_Host *shost = class_to_shost(dev);
297 struct scsi_host_template *sht = shost->hostt;
298 int ret = -EINVAL;
299 int type;
300
301 type = check_reset_type(buf);
302 if (!type)
303 goto exit_store_host_reset;
304
305 if (sht->host_reset)
306 ret = sht->host_reset(shost, type);
307 else
308 ret = -EOPNOTSUPP;
309
310exit_store_host_reset:
311 if (ret == 0)
312 ret = count;
313 return ret;
314}
315
316static DEVICE_ATTR(host_reset, S_IWUSR, NULL, store_host_reset);
317
318static ssize_t
319show_shost_eh_deadline(struct device *dev,
320 struct device_attribute *attr, char *buf)
321{
322 struct Scsi_Host *shost = class_to_shost(dev);
323
324 if (shost->eh_deadline == -1)
325 return snprintf(buf, strlen("off") + 2, "off\n");
326 return sprintf(buf, "%u\n", shost->eh_deadline / HZ);
327}
328
329static ssize_t
330store_shost_eh_deadline(struct device *dev, struct device_attribute *attr,
331 const char *buf, size_t count)
332{
333 struct Scsi_Host *shost = class_to_shost(dev);
334 int ret = -EINVAL;
335 unsigned long deadline, flags;
336
337 if (shost->transportt &&
338 (shost->transportt->eh_strategy_handler ||
339 !shost->hostt->eh_host_reset_handler))
340 return ret;
341
342 if (!strncmp(buf, "off", strlen("off")))
343 deadline = -1;
344 else {
345 ret = kstrtoul(buf, 10, &deadline);
346 if (ret)
347 return ret;
348 if (deadline * HZ > UINT_MAX)
349 return -EINVAL;
350 }
351
352 spin_lock_irqsave(shost->host_lock, flags);
353 if (scsi_host_in_recovery(shost))
354 ret = -EBUSY;
355 else {
356 if (deadline == -1)
357 shost->eh_deadline = -1;
358 else
359 shost->eh_deadline = deadline * HZ;
360
361 ret = count;
362 }
363 spin_unlock_irqrestore(shost->host_lock, flags);
364
365 return ret;
366}
367
368static DEVICE_ATTR(eh_deadline, S_IRUGO | S_IWUSR, show_shost_eh_deadline, store_shost_eh_deadline);
369
370shost_rd_attr(unique_id, "%u\n");
371shost_rd_attr(cmd_per_lun, "%hd\n");
372shost_rd_attr(can_queue, "%hd\n");
373shost_rd_attr(sg_tablesize, "%hu\n");
374shost_rd_attr(sg_prot_tablesize, "%hu\n");
375shost_rd_attr(unchecked_isa_dma, "%d\n");
376shost_rd_attr(prot_capabilities, "%u\n");
377shost_rd_attr(prot_guard_type, "%hd\n");
378shost_rd_attr2(proc_name, hostt->proc_name, "%s\n");
379
380static ssize_t
381show_host_busy(struct device *dev, struct device_attribute *attr, char *buf)
382{
383 struct Scsi_Host *shost = class_to_shost(dev);
384 return snprintf(buf, 20, "%d\n", scsi_host_busy(shost));
385}
386static DEVICE_ATTR(host_busy, S_IRUGO, show_host_busy, NULL);
387
388static ssize_t
389show_use_blk_mq(struct device *dev, struct device_attribute *attr, char *buf)
390{
391 return sprintf(buf, "1\n");
392}
393static DEVICE_ATTR(use_blk_mq, S_IRUGO, show_use_blk_mq, NULL);
394
395static struct attribute *scsi_sysfs_shost_attrs[] = {
396 &dev_attr_use_blk_mq.attr,
397 &dev_attr_unique_id.attr,
398 &dev_attr_host_busy.attr,
399 &dev_attr_cmd_per_lun.attr,
400 &dev_attr_can_queue.attr,
401 &dev_attr_sg_tablesize.attr,
402 &dev_attr_sg_prot_tablesize.attr,
403 &dev_attr_unchecked_isa_dma.attr,
404 &dev_attr_proc_name.attr,
405 &dev_attr_scan.attr,
406 &dev_attr_hstate.attr,
407 &dev_attr_supported_mode.attr,
408 &dev_attr_active_mode.attr,
409 &dev_attr_prot_capabilities.attr,
410 &dev_attr_prot_guard_type.attr,
411 &dev_attr_host_reset.attr,
412 &dev_attr_eh_deadline.attr,
413 NULL
414};
415
416static struct attribute_group scsi_shost_attr_group = {
417 .attrs = scsi_sysfs_shost_attrs,
418};
419
420const struct attribute_group *scsi_sysfs_shost_attr_groups[] = {
421 &scsi_shost_attr_group,
422 NULL
423};
424
425static void scsi_device_cls_release(struct device *class_dev)
426{
427 struct scsi_device *sdev;
428
429 sdev = class_to_sdev(class_dev);
430 put_device(&sdev->sdev_gendev);
431}
432
433static void scsi_device_dev_release_usercontext(struct work_struct *work)
434{
435 struct scsi_device *sdev;
436 struct device *parent;
437 struct list_head *this, *tmp;
438 struct scsi_vpd *vpd_pg80 = NULL, *vpd_pg83 = NULL;
439 unsigned long flags;
440
441 sdev = container_of(work, struct scsi_device, ew.work);
442
443 scsi_dh_release_device(sdev);
444
445 parent = sdev->sdev_gendev.parent;
446
447 spin_lock_irqsave(sdev->host->host_lock, flags);
448 list_del(&sdev->siblings);
449 list_del(&sdev->same_target_siblings);
450 list_del(&sdev->starved_entry);
451 spin_unlock_irqrestore(sdev->host->host_lock, flags);
452
453 cancel_work_sync(&sdev->event_work);
454
455 list_for_each_safe(this, tmp, &sdev->event_list) {
456 struct scsi_event *evt;
457
458 evt = list_entry(this, struct scsi_event, node);
459 list_del(&evt->node);
460 kfree(evt);
461 }
462
463 blk_put_queue(sdev->request_queue);
464
465 sdev->request_queue = NULL;
466
467 mutex_lock(&sdev->inquiry_mutex);
468 rcu_swap_protected(sdev->vpd_pg80, vpd_pg80,
469 lockdep_is_held(&sdev->inquiry_mutex));
470 rcu_swap_protected(sdev->vpd_pg83, vpd_pg83,
471 lockdep_is_held(&sdev->inquiry_mutex));
472 mutex_unlock(&sdev->inquiry_mutex);
473
474 if (vpd_pg83)
475 kfree_rcu(vpd_pg83, rcu);
476 if (vpd_pg80)
477 kfree_rcu(vpd_pg80, rcu);
478 kfree(sdev->inquiry);
479 kfree(sdev);
480
481 if (parent)
482 put_device(parent);
483}
484
485static void scsi_device_dev_release(struct device *dev)
486{
487 struct scsi_device *sdp = to_scsi_device(dev);
488 execute_in_process_context(scsi_device_dev_release_usercontext,
489 &sdp->ew);
490}
491
492static struct class sdev_class = {
493 .name = "scsi_device",
494 .dev_release = scsi_device_cls_release,
495};
496
497
498static int scsi_bus_match(struct device *dev, struct device_driver *gendrv)
499{
500 struct scsi_device *sdp;
501
502 if (dev->type != &scsi_dev_type)
503 return 0;
504
505 sdp = to_scsi_device(dev);
506 if (sdp->no_uld_attach)
507 return 0;
508 return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0;
509}
510
511static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
512{
513 struct scsi_device *sdev;
514
515 if (dev->type != &scsi_dev_type)
516 return 0;
517
518 sdev = to_scsi_device(dev);
519
520 add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type);
521 return 0;
522}
523
524struct bus_type scsi_bus_type = {
525 .name = "scsi",
526 .match = scsi_bus_match,
527 .uevent = scsi_bus_uevent,
528#ifdef CONFIG_PM
529 .pm = &scsi_bus_pm_ops,
530#endif
531};
532EXPORT_SYMBOL_GPL(scsi_bus_type);
533
534int scsi_sysfs_register(void)
535{
536 int error;
537
538 error = bus_register(&scsi_bus_type);
539 if (!error) {
540 error = class_register(&sdev_class);
541 if (error)
542 bus_unregister(&scsi_bus_type);
543 }
544
545 return error;
546}
547
548void scsi_sysfs_unregister(void)
549{
550 class_unregister(&sdev_class);
551 bus_unregister(&scsi_bus_type);
552}
553
554
555
556
557
558#define sdev_show_function(field, format_string) \
559static ssize_t \
560sdev_show_##field (struct device *dev, struct device_attribute *attr, \
561 char *buf) \
562{ \
563 struct scsi_device *sdev; \
564 sdev = to_scsi_device(dev); \
565 return snprintf (buf, 20, format_string, sdev->field); \
566} \
567
568
569
570
571
572#define sdev_rd_attr(field, format_string) \
573 sdev_show_function(field, format_string) \
574static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL);
575
576
577
578
579
580
581#define sdev_rw_attr(field, format_string) \
582 sdev_show_function(field, format_string) \
583 \
584static ssize_t \
585sdev_store_##field (struct device *dev, struct device_attribute *attr, \
586 const char *buf, size_t count) \
587{ \
588 struct scsi_device *sdev; \
589 sdev = to_scsi_device(dev); \
590 sscanf (buf, format_string, &sdev->field); \
591 return count; \
592} \
593static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
594
595
596
597#if 0
598
599
600
601
602#define sdev_rw_attr_bit(field) \
603 sdev_show_function(field, "%d\n") \
604 \
605static ssize_t \
606sdev_store_##field (struct device *dev, struct device_attribute *attr, \
607 const char *buf, size_t count) \
608{ \
609 int ret; \
610 struct scsi_device *sdev; \
611 ret = scsi_sdev_check_buf_bit(buf); \
612 if (ret >= 0) { \
613 sdev = to_scsi_device(dev); \
614 sdev->field = ret; \
615 ret = count; \
616 } \
617 return ret; \
618} \
619static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
620
621
622
623
624
625static int scsi_sdev_check_buf_bit(const char *buf)
626{
627 if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
628 if (buf[0] == '1')
629 return 1;
630 else if (buf[0] == '0')
631 return 0;
632 else
633 return -EINVAL;
634 } else
635 return -EINVAL;
636}
637#endif
638
639
640
641sdev_rd_attr (type, "%d\n");
642sdev_rd_attr (scsi_level, "%d\n");
643sdev_rd_attr (vendor, "%.8s\n");
644sdev_rd_attr (model, "%.16s\n");
645sdev_rd_attr (rev, "%.4s\n");
646
647static ssize_t
648sdev_show_device_busy(struct device *dev, struct device_attribute *attr,
649 char *buf)
650{
651 struct scsi_device *sdev = to_scsi_device(dev);
652 return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_busy));
653}
654static DEVICE_ATTR(device_busy, S_IRUGO, sdev_show_device_busy, NULL);
655
656static ssize_t
657sdev_show_device_blocked(struct device *dev, struct device_attribute *attr,
658 char *buf)
659{
660 struct scsi_device *sdev = to_scsi_device(dev);
661 return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_blocked));
662}
663static DEVICE_ATTR(device_blocked, S_IRUGO, sdev_show_device_blocked, NULL);
664
665
666
667
668static ssize_t
669sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf)
670{
671 struct scsi_device *sdev;
672 sdev = to_scsi_device(dev);
673 return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ);
674}
675
676static ssize_t
677sdev_store_timeout (struct device *dev, struct device_attribute *attr,
678 const char *buf, size_t count)
679{
680 struct scsi_device *sdev;
681 int timeout;
682 sdev = to_scsi_device(dev);
683 sscanf (buf, "%d\n", &timeout);
684 blk_queue_rq_timeout(sdev->request_queue, timeout * HZ);
685 return count;
686}
687static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout);
688
689static ssize_t
690sdev_show_eh_timeout(struct device *dev, struct device_attribute *attr, char *buf)
691{
692 struct scsi_device *sdev;
693 sdev = to_scsi_device(dev);
694 return snprintf(buf, 20, "%u\n", sdev->eh_timeout / HZ);
695}
696
697static ssize_t
698sdev_store_eh_timeout(struct device *dev, struct device_attribute *attr,
699 const char *buf, size_t count)
700{
701 struct scsi_device *sdev;
702 unsigned int eh_timeout;
703 int err;
704
705 if (!capable(CAP_SYS_ADMIN))
706 return -EACCES;
707
708 sdev = to_scsi_device(dev);
709 err = kstrtouint(buf, 10, &eh_timeout);
710 if (err)
711 return err;
712 sdev->eh_timeout = eh_timeout * HZ;
713
714 return count;
715}
716static DEVICE_ATTR(eh_timeout, S_IRUGO | S_IWUSR, sdev_show_eh_timeout, sdev_store_eh_timeout);
717
718static ssize_t
719store_rescan_field (struct device *dev, struct device_attribute *attr,
720 const char *buf, size_t count)
721{
722 scsi_rescan_device(dev);
723 return count;
724}
725static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field);
726
727static ssize_t
728sdev_store_delete(struct device *dev, struct device_attribute *attr,
729 const char *buf, size_t count)
730{
731 struct kernfs_node *kn;
732
733 kn = sysfs_break_active_protection(&dev->kobj, &attr->attr);
734 WARN_ON_ONCE(!kn);
735
736
737
738
739
740
741
742
743
744
745 device_remove_file(dev, attr);
746 scsi_remove_device(to_scsi_device(dev));
747 if (kn)
748 sysfs_unbreak_active_protection(kn);
749 return count;
750};
751static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete);
752
753static ssize_t
754store_state_field(struct device *dev, struct device_attribute *attr,
755 const char *buf, size_t count)
756{
757 int i, ret;
758 struct scsi_device *sdev = to_scsi_device(dev);
759 enum scsi_device_state state = 0;
760
761 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
762 const int len = strlen(sdev_states[i].name);
763 if (strncmp(sdev_states[i].name, buf, len) == 0 &&
764 buf[len] == '\n') {
765 state = sdev_states[i].value;
766 break;
767 }
768 }
769 if (!state)
770 return -EINVAL;
771
772 mutex_lock(&sdev->state_mutex);
773 ret = scsi_device_set_state(sdev, state);
774
775
776
777
778 if (ret == 0 && state == SDEV_RUNNING)
779 blk_mq_run_hw_queues(sdev->request_queue, true);
780 mutex_unlock(&sdev->state_mutex);
781
782 return ret == 0 ? count : -EINVAL;
783}
784
785static ssize_t
786show_state_field(struct device *dev, struct device_attribute *attr, char *buf)
787{
788 struct scsi_device *sdev = to_scsi_device(dev);
789 const char *name = scsi_device_state_name(sdev->sdev_state);
790
791 if (!name)
792 return -EINVAL;
793
794 return snprintf(buf, 20, "%s\n", name);
795}
796
797static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field);
798
799static ssize_t
800show_queue_type_field(struct device *dev, struct device_attribute *attr,
801 char *buf)
802{
803 struct scsi_device *sdev = to_scsi_device(dev);
804 const char *name = "none";
805
806 if (sdev->simple_tags)
807 name = "simple";
808
809 return snprintf(buf, 20, "%s\n", name);
810}
811
812static ssize_t
813store_queue_type_field(struct device *dev, struct device_attribute *attr,
814 const char *buf, size_t count)
815{
816 struct scsi_device *sdev = to_scsi_device(dev);
817
818 if (!sdev->tagged_supported)
819 return -EINVAL;
820
821 sdev_printk(KERN_INFO, sdev,
822 "ignoring write to deprecated queue_type attribute");
823 return count;
824}
825
826static DEVICE_ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field,
827 store_queue_type_field);
828
829#define sdev_vpd_pg_attr(_page) \
830static ssize_t \
831show_vpd_##_page(struct file *filp, struct kobject *kobj, \
832 struct bin_attribute *bin_attr, \
833 char *buf, loff_t off, size_t count) \
834{ \
835 struct device *dev = container_of(kobj, struct device, kobj); \
836 struct scsi_device *sdev = to_scsi_device(dev); \
837 struct scsi_vpd *vpd_page; \
838 int ret = -EINVAL; \
839 \
840 rcu_read_lock(); \
841 vpd_page = rcu_dereference(sdev->vpd_##_page); \
842 if (vpd_page) \
843 ret = memory_read_from_buffer(buf, count, &off, \
844 vpd_page->data, vpd_page->len); \
845 rcu_read_unlock(); \
846 return ret; \
847} \
848static struct bin_attribute dev_attr_vpd_##_page = { \
849 .attr = {.name = __stringify(vpd_##_page), .mode = S_IRUGO }, \
850 .size = 0, \
851 .read = show_vpd_##_page, \
852};
853
854sdev_vpd_pg_attr(pg83);
855sdev_vpd_pg_attr(pg80);
856
857static ssize_t show_inquiry(struct file *filep, struct kobject *kobj,
858 struct bin_attribute *bin_attr,
859 char *buf, loff_t off, size_t count)
860{
861 struct device *dev = container_of(kobj, struct device, kobj);
862 struct scsi_device *sdev = to_scsi_device(dev);
863
864 if (!sdev->inquiry)
865 return -EINVAL;
866
867 return memory_read_from_buffer(buf, count, &off, sdev->inquiry,
868 sdev->inquiry_len);
869}
870
871static struct bin_attribute dev_attr_inquiry = {
872 .attr = {
873 .name = "inquiry",
874 .mode = S_IRUGO,
875 },
876 .size = 0,
877 .read = show_inquiry,
878};
879
880static ssize_t
881show_iostat_counterbits(struct device *dev, struct device_attribute *attr,
882 char *buf)
883{
884 return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8);
885}
886
887static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL);
888
889#define show_sdev_iostat(field) \
890static ssize_t \
891show_iostat_##field(struct device *dev, struct device_attribute *attr, \
892 char *buf) \
893{ \
894 struct scsi_device *sdev = to_scsi_device(dev); \
895 unsigned long long count = atomic_read(&sdev->field); \
896 return snprintf(buf, 20, "0x%llx\n", count); \
897} \
898static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL)
899
900show_sdev_iostat(iorequest_cnt);
901show_sdev_iostat(iodone_cnt);
902show_sdev_iostat(ioerr_cnt);
903
904static ssize_t
905sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
906{
907 struct scsi_device *sdev;
908 sdev = to_scsi_device(dev);
909 return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type);
910}
911static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL);
912
913#define DECLARE_EVT_SHOW(name, Cap_name) \
914static ssize_t \
915sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \
916 char *buf) \
917{ \
918 struct scsi_device *sdev = to_scsi_device(dev); \
919 int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\
920 return snprintf(buf, 20, "%d\n", val); \
921}
922
923#define DECLARE_EVT_STORE(name, Cap_name) \
924static ssize_t \
925sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\
926 const char *buf, size_t count) \
927{ \
928 struct scsi_device *sdev = to_scsi_device(dev); \
929 int val = simple_strtoul(buf, NULL, 0); \
930 if (val == 0) \
931 clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
932 else if (val == 1) \
933 set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
934 else \
935 return -EINVAL; \
936 return count; \
937}
938
939#define DECLARE_EVT(name, Cap_name) \
940 DECLARE_EVT_SHOW(name, Cap_name) \
941 DECLARE_EVT_STORE(name, Cap_name) \
942 static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \
943 sdev_store_evt_##name);
944#define REF_EVT(name) &dev_attr_evt_##name.attr
945
946DECLARE_EVT(media_change, MEDIA_CHANGE)
947DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED)
948DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED)
949DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED)
950DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED)
951DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED)
952
953static ssize_t
954sdev_store_queue_depth(struct device *dev, struct device_attribute *attr,
955 const char *buf, size_t count)
956{
957 int depth, retval;
958 struct scsi_device *sdev = to_scsi_device(dev);
959 struct scsi_host_template *sht = sdev->host->hostt;
960
961 if (!sht->change_queue_depth)
962 return -EINVAL;
963
964 depth = simple_strtoul(buf, NULL, 0);
965
966 if (depth < 1 || depth > sdev->host->can_queue)
967 return -EINVAL;
968
969 retval = sht->change_queue_depth(sdev, depth);
970 if (retval < 0)
971 return retval;
972
973 sdev->max_queue_depth = sdev->queue_depth;
974
975 return count;
976}
977sdev_show_function(queue_depth, "%d\n");
978
979static DEVICE_ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth,
980 sdev_store_queue_depth);
981
982static ssize_t
983sdev_show_wwid(struct device *dev, struct device_attribute *attr,
984 char *buf)
985{
986 struct scsi_device *sdev = to_scsi_device(dev);
987 ssize_t count;
988
989 count = scsi_vpd_lun_id(sdev, buf, PAGE_SIZE);
990 if (count > 0) {
991 buf[count] = '\n';
992 count++;
993 }
994 return count;
995}
996static DEVICE_ATTR(wwid, S_IRUGO, sdev_show_wwid, NULL);
997
998#define BLIST_FLAG_NAME(name) \
999 [const_ilog2((__force __u64)BLIST_##name)] = #name
1000static const char *const sdev_bflags_name[] = {
1001#include "scsi_devinfo_tbl.c"
1002};
1003#undef BLIST_FLAG_NAME
1004
1005static ssize_t
1006sdev_show_blacklist(struct device *dev, struct device_attribute *attr,
1007 char *buf)
1008{
1009 struct scsi_device *sdev = to_scsi_device(dev);
1010 int i;
1011 ssize_t len = 0;
1012
1013 for (i = 0; i < sizeof(sdev->sdev_bflags) * BITS_PER_BYTE; i++) {
1014 const char *name = NULL;
1015
1016 if (!(sdev->sdev_bflags & (__force blist_flags_t)BIT(i)))
1017 continue;
1018 if (i < ARRAY_SIZE(sdev_bflags_name) && sdev_bflags_name[i])
1019 name = sdev_bflags_name[i];
1020
1021 if (name)
1022 len += snprintf(buf + len, PAGE_SIZE - len,
1023 "%s%s", len ? " " : "", name);
1024 else
1025 len += snprintf(buf + len, PAGE_SIZE - len,
1026 "%sINVALID_BIT(%d)", len ? " " : "", i);
1027 }
1028 if (len)
1029 len += snprintf(buf + len, PAGE_SIZE - len, "\n");
1030 return len;
1031}
1032static DEVICE_ATTR(blacklist, S_IRUGO, sdev_show_blacklist, NULL);
1033
1034#ifdef CONFIG_SCSI_DH
1035static ssize_t
1036sdev_show_dh_state(struct device *dev, struct device_attribute *attr,
1037 char *buf)
1038{
1039 struct scsi_device *sdev = to_scsi_device(dev);
1040
1041 if (!sdev->handler)
1042 return snprintf(buf, 20, "detached\n");
1043
1044 return snprintf(buf, 20, "%s\n", sdev->handler->name);
1045}
1046
1047static ssize_t
1048sdev_store_dh_state(struct device *dev, struct device_attribute *attr,
1049 const char *buf, size_t count)
1050{
1051 struct scsi_device *sdev = to_scsi_device(dev);
1052 int err = -EINVAL;
1053
1054 if (sdev->sdev_state == SDEV_CANCEL ||
1055 sdev->sdev_state == SDEV_DEL)
1056 return -ENODEV;
1057
1058 if (!sdev->handler) {
1059
1060
1061
1062 err = scsi_dh_attach(sdev->request_queue, buf);
1063 } else if (!strncmp(buf, "activate", 8)) {
1064
1065
1066
1067 if (sdev->handler->activate)
1068 err = sdev->handler->activate(sdev, NULL, NULL);
1069 else
1070 err = 0;
1071 } else if (!strncmp(buf, "detach", 6)) {
1072
1073
1074
1075 sdev_printk(KERN_WARNING, sdev,
1076 "can't detach handler %s.\n",
1077 sdev->handler->name);
1078 err = -EINVAL;
1079 }
1080
1081 return err < 0 ? err : count;
1082}
1083
1084static DEVICE_ATTR(dh_state, S_IRUGO | S_IWUSR, sdev_show_dh_state,
1085 sdev_store_dh_state);
1086
1087static ssize_t
1088sdev_show_access_state(struct device *dev,
1089 struct device_attribute *attr,
1090 char *buf)
1091{
1092 struct scsi_device *sdev = to_scsi_device(dev);
1093 unsigned char access_state;
1094 const char *access_state_name;
1095
1096 if (!sdev->handler)
1097 return -EINVAL;
1098
1099 access_state = (sdev->access_state & SCSI_ACCESS_STATE_MASK);
1100 access_state_name = scsi_access_state_name(access_state);
1101
1102 return sprintf(buf, "%s\n",
1103 access_state_name ? access_state_name : "unknown");
1104}
1105static DEVICE_ATTR(access_state, S_IRUGO, sdev_show_access_state, NULL);
1106
1107static ssize_t
1108sdev_show_preferred_path(struct device *dev,
1109 struct device_attribute *attr,
1110 char *buf)
1111{
1112 struct scsi_device *sdev = to_scsi_device(dev);
1113
1114 if (!sdev->handler)
1115 return -EINVAL;
1116
1117 if (sdev->access_state & SCSI_ACCESS_STATE_PREFERRED)
1118 return sprintf(buf, "1\n");
1119 else
1120 return sprintf(buf, "0\n");
1121}
1122static DEVICE_ATTR(preferred_path, S_IRUGO, sdev_show_preferred_path, NULL);
1123#endif
1124
1125static ssize_t
1126sdev_show_queue_ramp_up_period(struct device *dev,
1127 struct device_attribute *attr,
1128 char *buf)
1129{
1130 struct scsi_device *sdev;
1131 sdev = to_scsi_device(dev);
1132 return snprintf(buf, 20, "%u\n",
1133 jiffies_to_msecs(sdev->queue_ramp_up_period));
1134}
1135
1136static ssize_t
1137sdev_store_queue_ramp_up_period(struct device *dev,
1138 struct device_attribute *attr,
1139 const char *buf, size_t count)
1140{
1141 struct scsi_device *sdev = to_scsi_device(dev);
1142 unsigned int period;
1143
1144 if (kstrtouint(buf, 10, &period))
1145 return -EINVAL;
1146
1147 sdev->queue_ramp_up_period = msecs_to_jiffies(period);
1148 return count;
1149}
1150
1151static DEVICE_ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR,
1152 sdev_show_queue_ramp_up_period,
1153 sdev_store_queue_ramp_up_period);
1154
1155static umode_t scsi_sdev_attr_is_visible(struct kobject *kobj,
1156 struct attribute *attr, int i)
1157{
1158 struct device *dev = container_of(kobj, struct device, kobj);
1159 struct scsi_device *sdev = to_scsi_device(dev);
1160
1161
1162 if (attr == &dev_attr_queue_depth.attr &&
1163 !sdev->host->hostt->change_queue_depth)
1164 return S_IRUGO;
1165
1166 if (attr == &dev_attr_queue_ramp_up_period.attr &&
1167 !sdev->host->hostt->change_queue_depth)
1168 return 0;
1169
1170#ifdef CONFIG_SCSI_DH
1171 if (attr == &dev_attr_access_state.attr &&
1172 !sdev->handler)
1173 return 0;
1174 if (attr == &dev_attr_preferred_path.attr &&
1175 !sdev->handler)
1176 return 0;
1177#endif
1178 return attr->mode;
1179}
1180
1181static umode_t scsi_sdev_bin_attr_is_visible(struct kobject *kobj,
1182 struct bin_attribute *attr, int i)
1183{
1184 struct device *dev = container_of(kobj, struct device, kobj);
1185 struct scsi_device *sdev = to_scsi_device(dev);
1186
1187
1188 if (attr == &dev_attr_vpd_pg80 && !sdev->vpd_pg80)
1189 return 0;
1190
1191 if (attr == &dev_attr_vpd_pg83 && !sdev->vpd_pg83)
1192 return 0;
1193
1194 return S_IRUGO;
1195}
1196
1197
1198static struct attribute *scsi_sdev_attrs[] = {
1199 &dev_attr_device_blocked.attr,
1200 &dev_attr_type.attr,
1201 &dev_attr_scsi_level.attr,
1202 &dev_attr_device_busy.attr,
1203 &dev_attr_vendor.attr,
1204 &dev_attr_model.attr,
1205 &dev_attr_rev.attr,
1206 &dev_attr_rescan.attr,
1207 &dev_attr_delete.attr,
1208 &dev_attr_state.attr,
1209 &dev_attr_timeout.attr,
1210 &dev_attr_eh_timeout.attr,
1211 &dev_attr_iocounterbits.attr,
1212 &dev_attr_iorequest_cnt.attr,
1213 &dev_attr_iodone_cnt.attr,
1214 &dev_attr_ioerr_cnt.attr,
1215 &dev_attr_modalias.attr,
1216 &dev_attr_queue_depth.attr,
1217 &dev_attr_queue_type.attr,
1218 &dev_attr_wwid.attr,
1219 &dev_attr_blacklist.attr,
1220#ifdef CONFIG_SCSI_DH
1221 &dev_attr_dh_state.attr,
1222 &dev_attr_access_state.attr,
1223 &dev_attr_preferred_path.attr,
1224#endif
1225 &dev_attr_queue_ramp_up_period.attr,
1226 REF_EVT(media_change),
1227 REF_EVT(inquiry_change_reported),
1228 REF_EVT(capacity_change_reported),
1229 REF_EVT(soft_threshold_reached),
1230 REF_EVT(mode_parameter_change_reported),
1231 REF_EVT(lun_change_reported),
1232 NULL
1233};
1234
1235static struct bin_attribute *scsi_sdev_bin_attrs[] = {
1236 &dev_attr_vpd_pg83,
1237 &dev_attr_vpd_pg80,
1238 &dev_attr_inquiry,
1239 NULL
1240};
1241static struct attribute_group scsi_sdev_attr_group = {
1242 .attrs = scsi_sdev_attrs,
1243 .bin_attrs = scsi_sdev_bin_attrs,
1244 .is_visible = scsi_sdev_attr_is_visible,
1245 .is_bin_visible = scsi_sdev_bin_attr_is_visible,
1246};
1247
1248static const struct attribute_group *scsi_sdev_attr_groups[] = {
1249 &scsi_sdev_attr_group,
1250 NULL
1251};
1252
1253static int scsi_target_add(struct scsi_target *starget)
1254{
1255 int error;
1256
1257 if (starget->state != STARGET_CREATED)
1258 return 0;
1259
1260 error = device_add(&starget->dev);
1261 if (error) {
1262 dev_err(&starget->dev, "target device_add failed, error %d\n", error);
1263 return error;
1264 }
1265 transport_add_device(&starget->dev);
1266 starget->state = STARGET_RUNNING;
1267
1268 pm_runtime_set_active(&starget->dev);
1269 pm_runtime_enable(&starget->dev);
1270 device_enable_async_suspend(&starget->dev);
1271
1272 return 0;
1273}
1274
1275
1276
1277
1278
1279
1280
1281
1282int scsi_sysfs_add_sdev(struct scsi_device *sdev)
1283{
1284 int error, i;
1285 struct request_queue *rq = sdev->request_queue;
1286 struct scsi_target *starget = sdev->sdev_target;
1287
1288 error = scsi_target_add(starget);
1289 if (error)
1290 return error;
1291
1292 transport_configure_device(&starget->dev);
1293
1294 device_enable_async_suspend(&sdev->sdev_gendev);
1295 scsi_autopm_get_target(starget);
1296 pm_runtime_set_active(&sdev->sdev_gendev);
1297 pm_runtime_forbid(&sdev->sdev_gendev);
1298 pm_runtime_enable(&sdev->sdev_gendev);
1299 scsi_autopm_put_target(starget);
1300
1301 scsi_autopm_get_device(sdev);
1302
1303 scsi_dh_add_device(sdev);
1304
1305 error = device_add(&sdev->sdev_gendev);
1306 if (error) {
1307 sdev_printk(KERN_INFO, sdev,
1308 "failed to add device: %d\n", error);
1309 return error;
1310 }
1311
1312 device_enable_async_suspend(&sdev->sdev_dev);
1313 error = device_add(&sdev->sdev_dev);
1314 if (error) {
1315 sdev_printk(KERN_INFO, sdev,
1316 "failed to add class device: %d\n", error);
1317 device_del(&sdev->sdev_gendev);
1318 return error;
1319 }
1320 transport_add_device(&sdev->sdev_gendev);
1321 sdev->is_visible = 1;
1322
1323 error = bsg_scsi_register_queue(rq, &sdev->sdev_gendev);
1324 if (error)
1325
1326
1327 sdev_printk(KERN_INFO, sdev,
1328 "Failed to register bsg queue, errno=%d\n", error);
1329
1330
1331 if (sdev->host->hostt->sdev_attrs) {
1332 for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) {
1333 error = device_create_file(&sdev->sdev_gendev,
1334 sdev->host->hostt->sdev_attrs[i]);
1335 if (error)
1336 return error;
1337 }
1338 }
1339
1340 if (sdev->host->hostt->sdev_groups) {
1341 error = sysfs_create_groups(&sdev->sdev_gendev.kobj,
1342 sdev->host->hostt->sdev_groups);
1343 if (error)
1344 return error;
1345 }
1346
1347 scsi_autopm_put_device(sdev);
1348 return error;
1349}
1350
1351void __scsi_remove_device(struct scsi_device *sdev)
1352{
1353 struct device *dev = &sdev->sdev_gendev;
1354 int res;
1355
1356
1357
1358
1359
1360
1361 if (sdev->sdev_state == SDEV_DEL)
1362 return;
1363
1364 if (sdev->is_visible) {
1365
1366
1367
1368
1369 mutex_lock(&sdev->state_mutex);
1370
1371
1372
1373
1374
1375 res = scsi_device_set_state(sdev, SDEV_CANCEL);
1376 if (res != 0) {
1377 res = scsi_device_set_state(sdev, SDEV_DEL);
1378 if (res == 0)
1379 scsi_start_queue(sdev);
1380 }
1381 mutex_unlock(&sdev->state_mutex);
1382
1383 if (res != 0)
1384 return;
1385
1386 if (sdev->host->hostt->sdev_groups)
1387 sysfs_remove_groups(&sdev->sdev_gendev.kobj,
1388 sdev->host->hostt->sdev_groups);
1389
1390 bsg_unregister_queue(sdev->request_queue);
1391 device_unregister(&sdev->sdev_dev);
1392 transport_remove_device(dev);
1393 device_del(dev);
1394 } else
1395 put_device(&sdev->sdev_dev);
1396
1397
1398
1399
1400
1401
1402 mutex_lock(&sdev->state_mutex);
1403 scsi_device_set_state(sdev, SDEV_DEL);
1404 mutex_unlock(&sdev->state_mutex);
1405
1406 blk_cleanup_queue(sdev->request_queue);
1407 cancel_work_sync(&sdev->requeue_work);
1408
1409 if (sdev->host->hostt->slave_destroy)
1410 sdev->host->hostt->slave_destroy(sdev);
1411 transport_destroy_device(dev);
1412
1413
1414
1415
1416
1417
1418 scsi_target_reap(scsi_target(sdev));
1419
1420 put_device(dev);
1421}
1422
1423
1424
1425
1426
1427void scsi_remove_device(struct scsi_device *sdev)
1428{
1429 struct Scsi_Host *shost = sdev->host;
1430
1431 mutex_lock(&shost->scan_mutex);
1432 __scsi_remove_device(sdev);
1433 mutex_unlock(&shost->scan_mutex);
1434}
1435EXPORT_SYMBOL(scsi_remove_device);
1436
1437static void __scsi_remove_target(struct scsi_target *starget)
1438{
1439 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1440 unsigned long flags;
1441 struct scsi_device *sdev;
1442
1443 spin_lock_irqsave(shost->host_lock, flags);
1444 restart:
1445 list_for_each_entry(sdev, &shost->__devices, siblings) {
1446
1447
1448
1449
1450
1451
1452 if (sdev->channel != starget->channel ||
1453 sdev->id != starget->id)
1454 continue;
1455 if (sdev->sdev_state == SDEV_DEL ||
1456 sdev->sdev_state == SDEV_CANCEL ||
1457 !get_device(&sdev->sdev_gendev))
1458 continue;
1459 spin_unlock_irqrestore(shost->host_lock, flags);
1460 scsi_remove_device(sdev);
1461 put_device(&sdev->sdev_gendev);
1462 spin_lock_irqsave(shost->host_lock, flags);
1463 goto restart;
1464 }
1465 spin_unlock_irqrestore(shost->host_lock, flags);
1466}
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476void scsi_remove_target(struct device *dev)
1477{
1478 struct Scsi_Host *shost = dev_to_shost(dev->parent);
1479 struct scsi_target *starget;
1480 unsigned long flags;
1481
1482restart:
1483 spin_lock_irqsave(shost->host_lock, flags);
1484 list_for_each_entry(starget, &shost->__targets, siblings) {
1485 if (starget->state == STARGET_DEL ||
1486 starget->state == STARGET_REMOVE ||
1487 starget->state == STARGET_CREATED_REMOVE)
1488 continue;
1489 if (starget->dev.parent == dev || &starget->dev == dev) {
1490 kref_get(&starget->reap_ref);
1491 if (starget->state == STARGET_CREATED)
1492 starget->state = STARGET_CREATED_REMOVE;
1493 else
1494 starget->state = STARGET_REMOVE;
1495 spin_unlock_irqrestore(shost->host_lock, flags);
1496 __scsi_remove_target(starget);
1497 scsi_target_reap(starget);
1498 goto restart;
1499 }
1500 }
1501 spin_unlock_irqrestore(shost->host_lock, flags);
1502}
1503EXPORT_SYMBOL(scsi_remove_target);
1504
1505int scsi_register_driver(struct device_driver *drv)
1506{
1507 drv->bus = &scsi_bus_type;
1508
1509 return driver_register(drv);
1510}
1511EXPORT_SYMBOL(scsi_register_driver);
1512
1513int scsi_register_interface(struct class_interface *intf)
1514{
1515 intf->class = &sdev_class;
1516
1517 return class_interface_register(intf);
1518}
1519EXPORT_SYMBOL(scsi_register_interface);
1520
1521
1522
1523
1524
1525int scsi_sysfs_add_host(struct Scsi_Host *shost)
1526{
1527 int error, i;
1528
1529
1530 if (shost->hostt->shost_attrs) {
1531 for (i = 0; shost->hostt->shost_attrs[i]; i++) {
1532 error = device_create_file(&shost->shost_dev,
1533 shost->hostt->shost_attrs[i]);
1534 if (error)
1535 return error;
1536 }
1537 }
1538
1539 transport_register_device(&shost->shost_gendev);
1540 transport_configure_device(&shost->shost_gendev);
1541 return 0;
1542}
1543
1544static struct device_type scsi_dev_type = {
1545 .name = "scsi_device",
1546 .release = scsi_device_dev_release,
1547 .groups = scsi_sdev_attr_groups,
1548};
1549
1550void scsi_sysfs_device_initialize(struct scsi_device *sdev)
1551{
1552 unsigned long flags;
1553 struct Scsi_Host *shost = sdev->host;
1554 struct scsi_target *starget = sdev->sdev_target;
1555
1556 device_initialize(&sdev->sdev_gendev);
1557 sdev->sdev_gendev.bus = &scsi_bus_type;
1558 sdev->sdev_gendev.type = &scsi_dev_type;
1559 dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%llu",
1560 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1561
1562 device_initialize(&sdev->sdev_dev);
1563 sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev);
1564 sdev->sdev_dev.class = &sdev_class;
1565 dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%llu",
1566 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1567
1568
1569
1570
1571
1572
1573
1574 sdev->scsi_level = starget->scsi_level;
1575 if (sdev->scsi_level <= SCSI_2 &&
1576 sdev->scsi_level != SCSI_UNKNOWN &&
1577 !shost->no_scsi2_lun_in_cdb)
1578 sdev->lun_in_cdb = 1;
1579
1580 transport_setup_device(&sdev->sdev_gendev);
1581 spin_lock_irqsave(shost->host_lock, flags);
1582 list_add_tail(&sdev->same_target_siblings, &starget->devices);
1583 list_add_tail(&sdev->siblings, &shost->__devices);
1584 spin_unlock_irqrestore(shost->host_lock, flags);
1585
1586
1587
1588
1589
1590 kref_get(&starget->reap_ref);
1591}
1592
1593int scsi_is_sdev_device(const struct device *dev)
1594{
1595 return dev->type == &scsi_dev_type;
1596}
1597EXPORT_SYMBOL(scsi_is_sdev_device);
1598
1599
1600
1601struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, };
1602
