4 * SCSI sysfs interface routines.
6 * Created to pull SCSI mid layer sysfs routines into one file.
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>
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>
23 #include "scsi_priv.h"
24 #include "scsi_logging.h"
26 static struct device_type scsi_dev_type;
29 enum scsi_device_state value;
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_TRANSPORT_OFFLINE, "transport-offline" },
39 { SDEV_BLOCK, "blocked" },
40 { SDEV_CREATED_BLOCK, "created-blocked" },
43 const char *scsi_device_state_name(enum scsi_device_state state)
48 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
49 if (sdev_states[i].value == state) {
50 name = sdev_states[i].name;
58 enum scsi_host_state value;
61 { SHOST_CREATED, "created" },
62 { SHOST_RUNNING, "running" },
63 { SHOST_CANCEL, "cancel" },
64 { SHOST_DEL, "deleted" },
65 { SHOST_RECOVERY, "recovery" },
66 { SHOST_CANCEL_RECOVERY, "cancel/recovery" },
67 { SHOST_DEL_RECOVERY, "deleted/recovery", },
69 const char *scsi_host_state_name(enum scsi_host_state state)
74 for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
75 if (shost_states[i].value == state) {
76 name = shost_states[i].name;
83 static int check_set(unsigned int *val, char *src)
87 if (strncmp(src, "-", 20) == 0) {
88 *val = SCAN_WILD_CARD;
91 * Doesn't check for int overflow
93 *val = simple_strtoul(src, &last, 0);
100 static int scsi_scan(struct Scsi_Host *shost, const char *str)
102 char s1[15], s2[15], s3[15], junk;
103 unsigned int channel, id, lun;
106 res = sscanf(str, "%10s %10s %10s %c", s1, s2, s3, &junk);
109 if (check_set(&channel, s1))
111 if (check_set(&id, s2))
113 if (check_set(&lun, s3))
115 if (shost->transportt->user_scan)
116 res = shost->transportt->user_scan(shost, channel, id, lun);
118 res = scsi_scan_host_selected(shost, channel, id, lun, 1);
123 * shost_show_function: macro to create an attr function that can be used to
124 * show a non-bit field.
126 #define shost_show_function(name, field, format_string) \
128 show_##name (struct device *dev, struct device_attribute *attr, \
131 struct Scsi_Host *shost = class_to_shost(dev); \
132 return snprintf (buf, 20, format_string, shost->field); \
136 * shost_rd_attr: macro to create a function and attribute variable for a
139 #define shost_rd_attr2(name, field, format_string) \
140 shost_show_function(name, field, format_string) \
141 static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
143 #define shost_rd_attr(field, format_string) \
144 shost_rd_attr2(field, field, format_string)
147 * Create the actual show/store functions and data structures.
151 store_scan(struct device *dev, struct device_attribute *attr,
152 const char *buf, size_t count)
154 struct Scsi_Host *shost = class_to_shost(dev);
157 res = scsi_scan(shost, buf);
162 static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan);
165 store_shost_state(struct device *dev, struct device_attribute *attr,
166 const char *buf, size_t count)
169 struct Scsi_Host *shost = class_to_shost(dev);
170 enum scsi_host_state state = 0;
172 for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
173 const int len = strlen(shost_states[i].name);
174 if (strncmp(shost_states[i].name, buf, len) == 0 &&
176 state = shost_states[i].value;
183 if (scsi_host_set_state(shost, state))
189 show_shost_state(struct device *dev, struct device_attribute *attr, char *buf)
191 struct Scsi_Host *shost = class_to_shost(dev);
192 const char *name = scsi_host_state_name(shost->shost_state);
197 return snprintf(buf, 20, "%s\n", name);
200 /* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */
201 struct device_attribute dev_attr_hstate =
202 __ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state);
205 show_shost_mode(unsigned int mode, char *buf)
209 if (mode & MODE_INITIATOR)
210 len = sprintf(buf, "%s", "Initiator");
212 if (mode & MODE_TARGET)
213 len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target");
215 len += sprintf(buf + len, "\n");
221 show_shost_supported_mode(struct device *dev, struct device_attribute *attr,
224 struct Scsi_Host *shost = class_to_shost(dev);
225 unsigned int supported_mode = shost->hostt->supported_mode;
227 if (supported_mode == MODE_UNKNOWN)
228 /* by default this should be initiator */
229 supported_mode = MODE_INITIATOR;
231 return show_shost_mode(supported_mode, buf);
234 static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL);
237 show_shost_active_mode(struct device *dev,
238 struct device_attribute *attr, char *buf)
240 struct Scsi_Host *shost = class_to_shost(dev);
242 if (shost->active_mode == MODE_UNKNOWN)
243 return snprintf(buf, 20, "unknown\n");
245 return show_shost_mode(shost->active_mode, buf);
248 static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL);
250 static int check_reset_type(const char *str)
252 if (sysfs_streq(str, "adapter"))
253 return SCSI_ADAPTER_RESET;
254 else if (sysfs_streq(str, "firmware"))
255 return SCSI_FIRMWARE_RESET;
261 store_host_reset(struct device *dev, struct device_attribute *attr,
262 const char *buf, size_t count)
264 struct Scsi_Host *shost = class_to_shost(dev);
265 struct scsi_host_template *sht = shost->hostt;
269 type = check_reset_type(buf);
271 goto exit_store_host_reset;
274 ret = sht->host_reset(shost, type);
276 exit_store_host_reset:
282 static DEVICE_ATTR(host_reset, S_IWUSR, NULL, store_host_reset);
285 show_shost_eh_deadline(struct device *dev,
286 struct device_attribute *attr, char *buf)
288 struct Scsi_Host *shost = class_to_shost(dev);
290 if (shost->eh_deadline == -1)
291 return snprintf(buf, strlen("off") + 2, "off\n");
292 return sprintf(buf, "%u\n", shost->eh_deadline / HZ);
296 store_shost_eh_deadline(struct device *dev, struct device_attribute *attr,
297 const char *buf, size_t count)
299 struct Scsi_Host *shost = class_to_shost(dev);
301 unsigned long deadline, flags;
303 if (shost->transportt &&
304 (shost->transportt->eh_strategy_handler ||
305 !shost->hostt->eh_host_reset_handler))
308 if (!strncmp(buf, "off", strlen("off")))
311 ret = kstrtoul(buf, 10, &deadline);
314 if (deadline * HZ > UINT_MAX)
318 spin_lock_irqsave(shost->host_lock, flags);
319 if (scsi_host_in_recovery(shost))
323 shost->eh_deadline = -1;
325 shost->eh_deadline = deadline * HZ;
329 spin_unlock_irqrestore(shost->host_lock, flags);
334 static DEVICE_ATTR(eh_deadline, S_IRUGO | S_IWUSR, show_shost_eh_deadline, store_shost_eh_deadline);
336 shost_rd_attr(unique_id, "%u\n");
337 shost_rd_attr(host_busy, "%hu\n");
338 shost_rd_attr(cmd_per_lun, "%hd\n");
339 shost_rd_attr(can_queue, "%hd\n");
340 shost_rd_attr(sg_tablesize, "%hu\n");
341 shost_rd_attr(sg_prot_tablesize, "%hu\n");
342 shost_rd_attr(unchecked_isa_dma, "%d\n");
343 shost_rd_attr(prot_capabilities, "%u\n");
344 shost_rd_attr(prot_guard_type, "%hd\n");
345 shost_rd_attr2(proc_name, hostt->proc_name, "%s\n");
347 static struct attribute *scsi_sysfs_shost_attrs[] = {
348 &dev_attr_unique_id.attr,
349 &dev_attr_host_busy.attr,
350 &dev_attr_cmd_per_lun.attr,
351 &dev_attr_can_queue.attr,
352 &dev_attr_sg_tablesize.attr,
353 &dev_attr_sg_prot_tablesize.attr,
354 &dev_attr_unchecked_isa_dma.attr,
355 &dev_attr_proc_name.attr,
357 &dev_attr_hstate.attr,
358 &dev_attr_supported_mode.attr,
359 &dev_attr_active_mode.attr,
360 &dev_attr_prot_capabilities.attr,
361 &dev_attr_prot_guard_type.attr,
362 &dev_attr_host_reset.attr,
363 &dev_attr_eh_deadline.attr,
367 struct attribute_group scsi_shost_attr_group = {
368 .attrs = scsi_sysfs_shost_attrs,
371 const struct attribute_group *scsi_sysfs_shost_attr_groups[] = {
372 &scsi_shost_attr_group,
376 static void scsi_device_cls_release(struct device *class_dev)
378 struct scsi_device *sdev;
380 sdev = class_to_sdev(class_dev);
381 put_device(&sdev->sdev_gendev);
384 static void scsi_device_dev_release_usercontext(struct work_struct *work)
386 struct scsi_device *sdev;
387 struct device *parent;
388 struct list_head *this, *tmp;
391 sdev = container_of(work, struct scsi_device, ew.work);
393 parent = sdev->sdev_gendev.parent;
395 spin_lock_irqsave(sdev->host->host_lock, flags);
396 list_del(&sdev->siblings);
397 list_del(&sdev->same_target_siblings);
398 list_del(&sdev->starved_entry);
399 spin_unlock_irqrestore(sdev->host->host_lock, flags);
401 cancel_work_sync(&sdev->event_work);
403 list_for_each_safe(this, tmp, &sdev->event_list) {
404 struct scsi_event *evt;
406 evt = list_entry(this, struct scsi_event, node);
407 list_del(&evt->node);
411 blk_put_queue(sdev->request_queue);
412 /* NULL queue means the device can't be used */
413 sdev->request_queue = NULL;
415 kfree(sdev->inquiry);
422 static void scsi_device_dev_release(struct device *dev)
424 struct scsi_device *sdp = to_scsi_device(dev);
425 execute_in_process_context(scsi_device_dev_release_usercontext,
429 static struct class sdev_class = {
430 .name = "scsi_device",
431 .dev_release = scsi_device_cls_release,
434 /* all probing is done in the individual ->probe routines */
435 static int scsi_bus_match(struct device *dev, struct device_driver *gendrv)
437 struct scsi_device *sdp;
439 if (dev->type != &scsi_dev_type)
442 sdp = to_scsi_device(dev);
443 if (sdp->no_uld_attach)
445 return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0;
448 static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
450 struct scsi_device *sdev;
452 if (dev->type != &scsi_dev_type)
455 sdev = to_scsi_device(dev);
457 add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type);
461 struct bus_type scsi_bus_type = {
463 .match = scsi_bus_match,
464 .uevent = scsi_bus_uevent,
466 .pm = &scsi_bus_pm_ops,
469 EXPORT_SYMBOL_GPL(scsi_bus_type);
471 int scsi_sysfs_register(void)
475 error = bus_register(&scsi_bus_type);
477 error = class_register(&sdev_class);
479 bus_unregister(&scsi_bus_type);
485 void scsi_sysfs_unregister(void)
487 class_unregister(&sdev_class);
488 bus_unregister(&scsi_bus_type);
492 * sdev_show_function: macro to create an attr function that can be used to
493 * show a non-bit field.
495 #define sdev_show_function(field, format_string) \
497 sdev_show_##field (struct device *dev, struct device_attribute *attr, \
500 struct scsi_device *sdev; \
501 sdev = to_scsi_device(dev); \
502 return snprintf (buf, 20, format_string, sdev->field); \
506 * sdev_rd_attr: macro to create a function and attribute variable for a
509 #define sdev_rd_attr(field, format_string) \
510 sdev_show_function(field, format_string) \
511 static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL);
515 * sdev_rw_attr: create a function and attribute variable for a
518 #define sdev_rw_attr(field, format_string) \
519 sdev_show_function(field, format_string) \
522 sdev_store_##field (struct device *dev, struct device_attribute *attr, \
523 const char *buf, size_t count) \
525 struct scsi_device *sdev; \
526 sdev = to_scsi_device(dev); \
527 sscanf (buf, format_string, &sdev->field); \
530 static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
532 /* Currently we don't export bit fields, but we might in future,
533 * so leave this code in */
536 * sdev_rd_attr: create a function and attribute variable for a
537 * read/write bit field.
539 #define sdev_rw_attr_bit(field) \
540 sdev_show_function(field, "%d\n") \
543 sdev_store_##field (struct device *dev, struct device_attribute *attr, \
544 const char *buf, size_t count) \
547 struct scsi_device *sdev; \
548 ret = scsi_sdev_check_buf_bit(buf); \
550 sdev = to_scsi_device(dev); \
556 static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
559 * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1",
560 * else return -EINVAL.
562 static int scsi_sdev_check_buf_bit(const char *buf)
564 if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
567 else if (buf[0] == '0')
576 * Create the actual show/store functions and data structures.
578 sdev_rd_attr (device_blocked, "%d\n");
579 sdev_rd_attr (device_busy, "%d\n");
580 sdev_rd_attr (type, "%d\n");
581 sdev_rd_attr (scsi_level, "%d\n");
582 sdev_rd_attr (vendor, "%.8s\n");
583 sdev_rd_attr (model, "%.16s\n");
584 sdev_rd_attr (rev, "%.4s\n");
587 * TODO: can we make these symlinks to the block layer ones?
590 sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf)
592 struct scsi_device *sdev;
593 sdev = to_scsi_device(dev);
594 return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ);
598 sdev_store_timeout (struct device *dev, struct device_attribute *attr,
599 const char *buf, size_t count)
601 struct scsi_device *sdev;
603 sdev = to_scsi_device(dev);
604 sscanf (buf, "%d\n", &timeout);
605 blk_queue_rq_timeout(sdev->request_queue, timeout * HZ);
608 static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout);
611 sdev_show_eh_timeout(struct device *dev, struct device_attribute *attr, char *buf)
613 struct scsi_device *sdev;
614 sdev = to_scsi_device(dev);
615 return snprintf(buf, 20, "%u\n", sdev->eh_timeout / HZ);
619 sdev_store_eh_timeout(struct device *dev, struct device_attribute *attr,
620 const char *buf, size_t count)
622 struct scsi_device *sdev;
623 unsigned int eh_timeout;
626 if (!capable(CAP_SYS_ADMIN))
629 sdev = to_scsi_device(dev);
630 err = kstrtouint(buf, 10, &eh_timeout);
633 sdev->eh_timeout = eh_timeout * HZ;
637 static DEVICE_ATTR(eh_timeout, S_IRUGO | S_IWUSR, sdev_show_eh_timeout, sdev_store_eh_timeout);
640 store_rescan_field (struct device *dev, struct device_attribute *attr,
641 const char *buf, size_t count)
643 scsi_rescan_device(dev);
646 static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field);
648 static void sdev_store_delete_callback(struct device *dev)
650 scsi_remove_device(to_scsi_device(dev));
654 sdev_store_delete(struct device *dev, struct device_attribute *attr,
655 const char *buf, size_t count)
659 /* An attribute cannot be unregistered by one of its own methods,
660 * so we have to use this roundabout approach.
662 rc = device_schedule_callback(dev, sdev_store_delete_callback);
667 static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete);
670 store_state_field(struct device *dev, struct device_attribute *attr,
671 const char *buf, size_t count)
674 struct scsi_device *sdev = to_scsi_device(dev);
675 enum scsi_device_state state = 0;
677 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
678 const int len = strlen(sdev_states[i].name);
679 if (strncmp(sdev_states[i].name, buf, len) == 0 &&
681 state = sdev_states[i].value;
688 if (scsi_device_set_state(sdev, state))
694 show_state_field(struct device *dev, struct device_attribute *attr, char *buf)
696 struct scsi_device *sdev = to_scsi_device(dev);
697 const char *name = scsi_device_state_name(sdev->sdev_state);
702 return snprintf(buf, 20, "%s\n", name);
705 static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field);
708 show_queue_type_field(struct device *dev, struct device_attribute *attr,
711 struct scsi_device *sdev = to_scsi_device(dev);
712 const char *name = "none";
714 if (sdev->ordered_tags)
716 else if (sdev->simple_tags)
719 return snprintf(buf, 20, "%s\n", name);
723 store_queue_type_field(struct device *dev, struct device_attribute *attr,
724 const char *buf, size_t count)
726 struct scsi_device *sdev = to_scsi_device(dev);
727 struct scsi_host_template *sht = sdev->host->hostt;
728 int tag_type = 0, retval;
729 int prev_tag_type = scsi_get_tag_type(sdev);
731 if (!sdev->tagged_supported || !sht->change_queue_type)
734 if (strncmp(buf, "ordered", 7) == 0)
735 tag_type = MSG_ORDERED_TAG;
736 else if (strncmp(buf, "simple", 6) == 0)
737 tag_type = MSG_SIMPLE_TAG;
738 else if (strncmp(buf, "none", 4) != 0)
741 if (tag_type == prev_tag_type)
744 retval = sht->change_queue_type(sdev, tag_type);
751 static DEVICE_ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field,
752 store_queue_type_field);
755 show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf)
757 return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8);
760 static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL);
762 #define show_sdev_iostat(field) \
764 show_iostat_##field(struct device *dev, struct device_attribute *attr, \
767 struct scsi_device *sdev = to_scsi_device(dev); \
768 unsigned long long count = atomic_read(&sdev->field); \
769 return snprintf(buf, 20, "0x%llx\n", count); \
771 static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL)
773 show_sdev_iostat(iorequest_cnt);
774 show_sdev_iostat(iodone_cnt);
775 show_sdev_iostat(ioerr_cnt);
778 sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
780 struct scsi_device *sdev;
781 sdev = to_scsi_device(dev);
782 return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type);
784 static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL);
786 #define DECLARE_EVT_SHOW(name, Cap_name) \
788 sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \
791 struct scsi_device *sdev = to_scsi_device(dev); \
792 int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\
793 return snprintf(buf, 20, "%d\n", val); \
796 #define DECLARE_EVT_STORE(name, Cap_name) \
798 sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\
799 const char *buf, size_t count) \
801 struct scsi_device *sdev = to_scsi_device(dev); \
802 int val = simple_strtoul(buf, NULL, 0); \
804 clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
806 set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
812 #define DECLARE_EVT(name, Cap_name) \
813 DECLARE_EVT_SHOW(name, Cap_name) \
814 DECLARE_EVT_STORE(name, Cap_name) \
815 static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \
816 sdev_store_evt_##name);
817 #define REF_EVT(name) &dev_attr_evt_##name.attr
819 DECLARE_EVT(media_change, MEDIA_CHANGE)
820 DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED)
821 DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED)
822 DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED)
823 DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED)
824 DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED)
827 sdev_store_queue_depth(struct device *dev, struct device_attribute *attr,
828 const char *buf, size_t count)
831 struct scsi_device *sdev = to_scsi_device(dev);
832 struct scsi_host_template *sht = sdev->host->hostt;
834 if (!sht->change_queue_depth)
837 depth = simple_strtoul(buf, NULL, 0);
842 retval = sht->change_queue_depth(sdev, depth,
843 SCSI_QDEPTH_DEFAULT);
847 sdev->max_queue_depth = sdev->queue_depth;
851 sdev_show_function(queue_depth, "%d\n");
853 static DEVICE_ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth,
854 sdev_store_queue_depth);
857 sdev_show_queue_ramp_up_period(struct device *dev,
858 struct device_attribute *attr,
861 struct scsi_device *sdev;
862 sdev = to_scsi_device(dev);
863 return snprintf(buf, 20, "%u\n",
864 jiffies_to_msecs(sdev->queue_ramp_up_period));
868 sdev_store_queue_ramp_up_period(struct device *dev,
869 struct device_attribute *attr,
870 const char *buf, size_t count)
872 struct scsi_device *sdev = to_scsi_device(dev);
873 unsigned long period;
875 if (strict_strtoul(buf, 10, &period))
878 sdev->queue_ramp_up_period = msecs_to_jiffies(period);
882 static DEVICE_ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR,
883 sdev_show_queue_ramp_up_period,
884 sdev_store_queue_ramp_up_period);
886 static umode_t scsi_sdev_attr_is_visible(struct kobject *kobj,
887 struct attribute *attr, int i)
889 struct device *dev = container_of(kobj, struct device, kobj);
890 struct scsi_device *sdev = to_scsi_device(dev);
893 if (attr == &dev_attr_queue_depth.attr &&
894 !sdev->host->hostt->change_queue_depth)
897 if (attr == &dev_attr_queue_ramp_up_period.attr &&
898 !sdev->host->hostt->change_queue_depth)
901 if (attr == &dev_attr_queue_type.attr &&
902 !sdev->host->hostt->change_queue_type)
908 /* Default template for device attributes. May NOT be modified */
909 static struct attribute *scsi_sdev_attrs[] = {
910 &dev_attr_device_blocked.attr,
912 &dev_attr_scsi_level.attr,
913 &dev_attr_device_busy.attr,
914 &dev_attr_vendor.attr,
915 &dev_attr_model.attr,
917 &dev_attr_rescan.attr,
918 &dev_attr_delete.attr,
919 &dev_attr_state.attr,
920 &dev_attr_timeout.attr,
921 &dev_attr_eh_timeout.attr,
922 &dev_attr_iocounterbits.attr,
923 &dev_attr_iorequest_cnt.attr,
924 &dev_attr_iodone_cnt.attr,
925 &dev_attr_ioerr_cnt.attr,
926 &dev_attr_modalias.attr,
927 &dev_attr_queue_depth.attr,
928 &dev_attr_queue_type.attr,
929 &dev_attr_queue_ramp_up_period.attr,
930 REF_EVT(media_change),
931 REF_EVT(inquiry_change_reported),
932 REF_EVT(capacity_change_reported),
933 REF_EVT(soft_threshold_reached),
934 REF_EVT(mode_parameter_change_reported),
935 REF_EVT(lun_change_reported),
939 static struct attribute_group scsi_sdev_attr_group = {
940 .attrs = scsi_sdev_attrs,
941 .is_visible = scsi_sdev_attr_is_visible,
944 static const struct attribute_group *scsi_sdev_attr_groups[] = {
945 &scsi_sdev_attr_group,
949 static int scsi_target_add(struct scsi_target *starget)
953 if (starget->state != STARGET_CREATED)
956 error = device_add(&starget->dev);
958 dev_err(&starget->dev, "target device_add failed, error %d\n", error);
961 transport_add_device(&starget->dev);
962 starget->state = STARGET_RUNNING;
964 pm_runtime_set_active(&starget->dev);
965 pm_runtime_enable(&starget->dev);
966 device_enable_async_suspend(&starget->dev);
972 * scsi_sysfs_add_sdev - add scsi device to sysfs
973 * @sdev: scsi_device to add
976 * 0 on Success / non-zero on Failure
978 int scsi_sysfs_add_sdev(struct scsi_device *sdev)
981 struct request_queue *rq = sdev->request_queue;
982 struct scsi_target *starget = sdev->sdev_target;
984 error = scsi_device_set_state(sdev, SDEV_RUNNING);
988 error = scsi_target_add(starget);
992 transport_configure_device(&starget->dev);
994 device_enable_async_suspend(&sdev->sdev_gendev);
995 scsi_autopm_get_target(starget);
996 pm_runtime_set_active(&sdev->sdev_gendev);
997 pm_runtime_forbid(&sdev->sdev_gendev);
998 pm_runtime_enable(&sdev->sdev_gendev);
999 scsi_autopm_put_target(starget);
1001 /* The following call will keep sdev active indefinitely, until
1002 * its driver does a corresponding scsi_autopm_pm_device(). Only
1003 * drivers supporting autosuspend will do this.
1005 scsi_autopm_get_device(sdev);
1007 error = device_add(&sdev->sdev_gendev);
1009 sdev_printk(KERN_INFO, sdev,
1010 "failed to add device: %d\n", error);
1013 device_enable_async_suspend(&sdev->sdev_dev);
1014 error = device_add(&sdev->sdev_dev);
1016 sdev_printk(KERN_INFO, sdev,
1017 "failed to add class device: %d\n", error);
1018 device_del(&sdev->sdev_gendev);
1021 transport_add_device(&sdev->sdev_gendev);
1022 sdev->is_visible = 1;
1024 error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL);
1027 /* we're treating error on bsg register as non-fatal,
1028 * so pretend nothing went wrong */
1029 sdev_printk(KERN_INFO, sdev,
1030 "Failed to register bsg queue, errno=%d\n", error);
1032 /* add additional host specific attributes */
1033 if (sdev->host->hostt->sdev_attrs) {
1034 for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) {
1035 error = device_create_file(&sdev->sdev_gendev,
1036 sdev->host->hostt->sdev_attrs[i]);
1045 void __scsi_remove_device(struct scsi_device *sdev)
1047 struct device *dev = &sdev->sdev_gendev;
1049 if (sdev->is_visible) {
1050 if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0)
1053 bsg_unregister_queue(sdev->request_queue);
1054 device_unregister(&sdev->sdev_dev);
1055 transport_remove_device(dev);
1058 put_device(&sdev->sdev_dev);
1061 * Stop accepting new requests and wait until all queuecommand() and
1062 * scsi_run_queue() invocations have finished before tearing down the
1065 scsi_device_set_state(sdev, SDEV_DEL);
1066 blk_cleanup_queue(sdev->request_queue);
1067 cancel_work_sync(&sdev->requeue_work);
1069 if (sdev->host->hostt->slave_destroy)
1070 sdev->host->hostt->slave_destroy(sdev);
1071 transport_destroy_device(dev);
1074 * Paired with the kref_get() in scsi_sysfs_initialize(). We have
1075 * remoed sysfs visibility from the device, so make the target
1076 * invisible if this was the last device underneath it.
1078 scsi_target_reap(scsi_target(sdev));
1084 * scsi_remove_device - unregister a device from the scsi bus
1085 * @sdev: scsi_device to unregister
1087 void scsi_remove_device(struct scsi_device *sdev)
1089 struct Scsi_Host *shost = sdev->host;
1091 mutex_lock(&shost->scan_mutex);
1092 __scsi_remove_device(sdev);
1093 mutex_unlock(&shost->scan_mutex);
1095 EXPORT_SYMBOL(scsi_remove_device);
1097 static void __scsi_remove_target(struct scsi_target *starget)
1099 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1100 unsigned long flags;
1101 struct scsi_device *sdev;
1103 spin_lock_irqsave(shost->host_lock, flags);
1105 list_for_each_entry(sdev, &shost->__devices, siblings) {
1106 if (sdev->channel != starget->channel ||
1107 sdev->id != starget->id ||
1108 scsi_device_get(sdev))
1110 spin_unlock_irqrestore(shost->host_lock, flags);
1111 scsi_remove_device(sdev);
1112 scsi_device_put(sdev);
1113 spin_lock_irqsave(shost->host_lock, flags);
1116 spin_unlock_irqrestore(shost->host_lock, flags);
1120 * scsi_remove_target - try to remove a target and all its devices
1121 * @dev: generic starget or parent of generic stargets to be removed
1123 * Note: This is slightly racy. It is possible that if the user
1124 * requests the addition of another device then the target won't be
1127 void scsi_remove_target(struct device *dev)
1129 struct Scsi_Host *shost = dev_to_shost(dev->parent);
1130 struct scsi_target *starget, *last = NULL;
1131 unsigned long flags;
1133 /* remove targets being careful to lookup next entry before
1136 spin_lock_irqsave(shost->host_lock, flags);
1137 list_for_each_entry(starget, &shost->__targets, siblings) {
1138 if (starget->state == STARGET_DEL)
1140 if (starget->dev.parent == dev || &starget->dev == dev) {
1141 /* assuming new targets arrive at the end */
1142 kref_get(&starget->reap_ref);
1143 spin_unlock_irqrestore(shost->host_lock, flags);
1145 scsi_target_reap(last);
1147 __scsi_remove_target(starget);
1148 spin_lock_irqsave(shost->host_lock, flags);
1151 spin_unlock_irqrestore(shost->host_lock, flags);
1154 scsi_target_reap(last);
1156 EXPORT_SYMBOL(scsi_remove_target);
1158 int scsi_register_driver(struct device_driver *drv)
1160 drv->bus = &scsi_bus_type;
1162 return driver_register(drv);
1164 EXPORT_SYMBOL(scsi_register_driver);
1166 int scsi_register_interface(struct class_interface *intf)
1168 intf->class = &sdev_class;
1170 return class_interface_register(intf);
1172 EXPORT_SYMBOL(scsi_register_interface);
1175 * scsi_sysfs_add_host - add scsi host to subsystem
1176 * @shost: scsi host struct to add to subsystem
1178 int scsi_sysfs_add_host(struct Scsi_Host *shost)
1182 /* add host specific attributes */
1183 if (shost->hostt->shost_attrs) {
1184 for (i = 0; shost->hostt->shost_attrs[i]; i++) {
1185 error = device_create_file(&shost->shost_dev,
1186 shost->hostt->shost_attrs[i]);
1192 transport_register_device(&shost->shost_gendev);
1193 transport_configure_device(&shost->shost_gendev);
1197 static struct device_type scsi_dev_type = {
1198 .name = "scsi_device",
1199 .release = scsi_device_dev_release,
1200 .groups = scsi_sdev_attr_groups,
1203 void scsi_sysfs_device_initialize(struct scsi_device *sdev)
1205 unsigned long flags;
1206 struct Scsi_Host *shost = sdev->host;
1207 struct scsi_target *starget = sdev->sdev_target;
1209 device_initialize(&sdev->sdev_gendev);
1210 sdev->sdev_gendev.bus = &scsi_bus_type;
1211 sdev->sdev_gendev.type = &scsi_dev_type;
1212 dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%d",
1213 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1215 device_initialize(&sdev->sdev_dev);
1216 sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev);
1217 sdev->sdev_dev.class = &sdev_class;
1218 dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%d",
1219 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1220 sdev->scsi_level = starget->scsi_level;
1221 transport_setup_device(&sdev->sdev_gendev);
1222 spin_lock_irqsave(shost->host_lock, flags);
1223 list_add_tail(&sdev->same_target_siblings, &starget->devices);
1224 list_add_tail(&sdev->siblings, &shost->__devices);
1225 spin_unlock_irqrestore(shost->host_lock, flags);
1227 * device can now only be removed via __scsi_remove_device() so hold
1228 * the target. Target will be held in CREATED state until something
1229 * beneath it becomes visible (in which case it moves to RUNNING)
1231 kref_get(&starget->reap_ref);
1234 int scsi_is_sdev_device(const struct device *dev)
1236 return dev->type == &scsi_dev_type;
1238 EXPORT_SYMBOL(scsi_is_sdev_device);
1240 /* A blank transport template that is used in drivers that don't
1241 * yet implement Transport Attributes */
1242 struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, };