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 return sprintf(buf, "%d\n", shost->eh_deadline / HZ);
294 store_shost_eh_deadline(struct device *dev, struct device_attribute *attr,
295 const char *buf, size_t count)
297 struct Scsi_Host *shost = class_to_shost(dev);
302 if (shost->transportt && shost->transportt->eh_strategy_handler)
305 if (sscanf(buf, "%d\n", &deadline) == 1) {
306 spin_lock_irqsave(shost->host_lock, flags);
307 if (scsi_host_in_recovery(shost))
310 shost->eh_deadline = deadline * HZ;
313 spin_unlock_irqrestore(shost->host_lock, flags);
318 static DEVICE_ATTR(eh_deadline, S_IRUGO | S_IWUSR, show_shost_eh_deadline, store_shost_eh_deadline);
320 shost_rd_attr(unique_id, "%u\n");
321 shost_rd_attr(host_busy, "%hu\n");
322 shost_rd_attr(cmd_per_lun, "%hd\n");
323 shost_rd_attr(can_queue, "%hd\n");
324 shost_rd_attr(sg_tablesize, "%hu\n");
325 shost_rd_attr(sg_prot_tablesize, "%hu\n");
326 shost_rd_attr(unchecked_isa_dma, "%d\n");
327 shost_rd_attr(prot_capabilities, "%u\n");
328 shost_rd_attr(prot_guard_type, "%hd\n");
329 shost_rd_attr2(proc_name, hostt->proc_name, "%s\n");
331 static struct attribute *scsi_sysfs_shost_attrs[] = {
332 &dev_attr_unique_id.attr,
333 &dev_attr_host_busy.attr,
334 &dev_attr_cmd_per_lun.attr,
335 &dev_attr_can_queue.attr,
336 &dev_attr_sg_tablesize.attr,
337 &dev_attr_sg_prot_tablesize.attr,
338 &dev_attr_unchecked_isa_dma.attr,
339 &dev_attr_proc_name.attr,
341 &dev_attr_hstate.attr,
342 &dev_attr_supported_mode.attr,
343 &dev_attr_active_mode.attr,
344 &dev_attr_prot_capabilities.attr,
345 &dev_attr_prot_guard_type.attr,
346 &dev_attr_host_reset.attr,
347 &dev_attr_eh_deadline.attr,
351 struct attribute_group scsi_shost_attr_group = {
352 .attrs = scsi_sysfs_shost_attrs,
355 const struct attribute_group *scsi_sysfs_shost_attr_groups[] = {
356 &scsi_shost_attr_group,
360 static void scsi_device_cls_release(struct device *class_dev)
362 struct scsi_device *sdev;
364 sdev = class_to_sdev(class_dev);
365 put_device(&sdev->sdev_gendev);
368 static void scsi_device_dev_release_usercontext(struct work_struct *work)
370 struct scsi_device *sdev;
371 struct device *parent;
372 struct scsi_target *starget;
373 struct list_head *this, *tmp;
376 sdev = container_of(work, struct scsi_device, ew.work);
378 parent = sdev->sdev_gendev.parent;
379 starget = to_scsi_target(parent);
381 spin_lock_irqsave(sdev->host->host_lock, flags);
383 list_del(&sdev->siblings);
384 list_del(&sdev->same_target_siblings);
385 list_del(&sdev->starved_entry);
386 spin_unlock_irqrestore(sdev->host->host_lock, flags);
388 cancel_work_sync(&sdev->event_work);
390 list_for_each_safe(this, tmp, &sdev->event_list) {
391 struct scsi_event *evt;
393 evt = list_entry(this, struct scsi_event, node);
394 list_del(&evt->node);
398 blk_put_queue(sdev->request_queue);
399 /* NULL queue means the device can't be used */
400 sdev->request_queue = NULL;
402 scsi_target_reap(scsi_target(sdev));
404 kfree(sdev->inquiry);
411 static void scsi_device_dev_release(struct device *dev)
413 struct scsi_device *sdp = to_scsi_device(dev);
414 execute_in_process_context(scsi_device_dev_release_usercontext,
418 static struct class sdev_class = {
419 .name = "scsi_device",
420 .dev_release = scsi_device_cls_release,
423 /* all probing is done in the individual ->probe routines */
424 static int scsi_bus_match(struct device *dev, struct device_driver *gendrv)
426 struct scsi_device *sdp;
428 if (dev->type != &scsi_dev_type)
431 sdp = to_scsi_device(dev);
432 if (sdp->no_uld_attach)
434 return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0;
437 static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
439 struct scsi_device *sdev;
441 if (dev->type != &scsi_dev_type)
444 sdev = to_scsi_device(dev);
446 add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type);
450 struct bus_type scsi_bus_type = {
452 .match = scsi_bus_match,
453 .uevent = scsi_bus_uevent,
455 .pm = &scsi_bus_pm_ops,
458 EXPORT_SYMBOL_GPL(scsi_bus_type);
460 int scsi_sysfs_register(void)
464 error = bus_register(&scsi_bus_type);
466 error = class_register(&sdev_class);
468 bus_unregister(&scsi_bus_type);
474 void scsi_sysfs_unregister(void)
476 class_unregister(&sdev_class);
477 bus_unregister(&scsi_bus_type);
481 * sdev_show_function: macro to create an attr function that can be used to
482 * show a non-bit field.
484 #define sdev_show_function(field, format_string) \
486 sdev_show_##field (struct device *dev, struct device_attribute *attr, \
489 struct scsi_device *sdev; \
490 sdev = to_scsi_device(dev); \
491 return snprintf (buf, 20, format_string, sdev->field); \
495 * sdev_rd_attr: macro to create a function and attribute variable for a
498 #define sdev_rd_attr(field, format_string) \
499 sdev_show_function(field, format_string) \
500 static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL);
504 * sdev_rw_attr: create a function and attribute variable for a
507 #define sdev_rw_attr(field, format_string) \
508 sdev_show_function(field, format_string) \
511 sdev_store_##field (struct device *dev, struct device_attribute *attr, \
512 const char *buf, size_t count) \
514 struct scsi_device *sdev; \
515 sdev = to_scsi_device(dev); \
516 sscanf (buf, format_string, &sdev->field); \
519 static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
521 /* Currently we don't export bit fields, but we might in future,
522 * so leave this code in */
525 * sdev_rd_attr: create a function and attribute variable for a
526 * read/write bit field.
528 #define sdev_rw_attr_bit(field) \
529 sdev_show_function(field, "%d\n") \
532 sdev_store_##field (struct device *dev, struct device_attribute *attr, \
533 const char *buf, size_t count) \
536 struct scsi_device *sdev; \
537 ret = scsi_sdev_check_buf_bit(buf); \
539 sdev = to_scsi_device(dev); \
545 static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
548 * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1",
549 * else return -EINVAL.
551 static int scsi_sdev_check_buf_bit(const char *buf)
553 if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
556 else if (buf[0] == '0')
565 * Create the actual show/store functions and data structures.
567 sdev_rd_attr (device_blocked, "%d\n");
568 sdev_rd_attr (queue_depth, "%d\n");
569 sdev_rd_attr (device_busy, "%d\n");
570 sdev_rd_attr (type, "%d\n");
571 sdev_rd_attr (scsi_level, "%d\n");
572 sdev_rd_attr (vendor, "%.8s\n");
573 sdev_rd_attr (model, "%.16s\n");
574 sdev_rd_attr (rev, "%.4s\n");
577 * TODO: can we make these symlinks to the block layer ones?
580 sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf)
582 struct scsi_device *sdev;
583 sdev = to_scsi_device(dev);
584 return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ);
588 sdev_store_timeout (struct device *dev, struct device_attribute *attr,
589 const char *buf, size_t count)
591 struct scsi_device *sdev;
593 sdev = to_scsi_device(dev);
594 sscanf (buf, "%d\n", &timeout);
595 blk_queue_rq_timeout(sdev->request_queue, timeout * HZ);
598 static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout);
601 sdev_show_eh_timeout(struct device *dev, struct device_attribute *attr, char *buf)
603 struct scsi_device *sdev;
604 sdev = to_scsi_device(dev);
605 return snprintf(buf, 20, "%u\n", sdev->eh_timeout / HZ);
609 sdev_store_eh_timeout(struct device *dev, struct device_attribute *attr,
610 const char *buf, size_t count)
612 struct scsi_device *sdev;
613 unsigned int eh_timeout;
616 if (!capable(CAP_SYS_ADMIN))
619 sdev = to_scsi_device(dev);
620 err = kstrtouint(buf, 10, &eh_timeout);
623 sdev->eh_timeout = eh_timeout * HZ;
627 static DEVICE_ATTR(eh_timeout, S_IRUGO | S_IWUSR, sdev_show_eh_timeout, sdev_store_eh_timeout);
630 store_rescan_field (struct device *dev, struct device_attribute *attr,
631 const char *buf, size_t count)
633 scsi_rescan_device(dev);
636 static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field);
638 static void sdev_store_delete_callback(struct device *dev)
640 scsi_remove_device(to_scsi_device(dev));
644 sdev_store_delete(struct device *dev, struct device_attribute *attr,
645 const char *buf, size_t count)
649 /* An attribute cannot be unregistered by one of its own methods,
650 * so we have to use this roundabout approach.
652 rc = device_schedule_callback(dev, sdev_store_delete_callback);
657 static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete);
660 store_state_field(struct device *dev, struct device_attribute *attr,
661 const char *buf, size_t count)
664 struct scsi_device *sdev = to_scsi_device(dev);
665 enum scsi_device_state state = 0;
667 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
668 const int len = strlen(sdev_states[i].name);
669 if (strncmp(sdev_states[i].name, buf, len) == 0 &&
671 state = sdev_states[i].value;
678 if (scsi_device_set_state(sdev, state))
684 show_state_field(struct device *dev, struct device_attribute *attr, char *buf)
686 struct scsi_device *sdev = to_scsi_device(dev);
687 const char *name = scsi_device_state_name(sdev->sdev_state);
692 return snprintf(buf, 20, "%s\n", name);
695 static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field);
698 show_queue_type_field(struct device *dev, struct device_attribute *attr,
701 struct scsi_device *sdev = to_scsi_device(dev);
702 const char *name = "none";
704 if (sdev->ordered_tags)
706 else if (sdev->simple_tags)
709 return snprintf(buf, 20, "%s\n", name);
712 static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL);
715 show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf)
717 return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8);
720 static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL);
722 #define show_sdev_iostat(field) \
724 show_iostat_##field(struct device *dev, struct device_attribute *attr, \
727 struct scsi_device *sdev = to_scsi_device(dev); \
728 unsigned long long count = atomic_read(&sdev->field); \
729 return snprintf(buf, 20, "0x%llx\n", count); \
731 static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL)
733 show_sdev_iostat(iorequest_cnt);
734 show_sdev_iostat(iodone_cnt);
735 show_sdev_iostat(ioerr_cnt);
738 sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
740 struct scsi_device *sdev;
741 sdev = to_scsi_device(dev);
742 return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type);
744 static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL);
746 #define DECLARE_EVT_SHOW(name, Cap_name) \
748 sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \
751 struct scsi_device *sdev = to_scsi_device(dev); \
752 int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\
753 return snprintf(buf, 20, "%d\n", val); \
756 #define DECLARE_EVT_STORE(name, Cap_name) \
758 sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\
759 const char *buf, size_t count) \
761 struct scsi_device *sdev = to_scsi_device(dev); \
762 int val = simple_strtoul(buf, NULL, 0); \
764 clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
766 set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
772 #define DECLARE_EVT(name, Cap_name) \
773 DECLARE_EVT_SHOW(name, Cap_name) \
774 DECLARE_EVT_STORE(name, Cap_name) \
775 static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \
776 sdev_store_evt_##name);
777 #define REF_EVT(name) &dev_attr_evt_##name.attr
779 DECLARE_EVT(media_change, MEDIA_CHANGE)
780 DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED)
781 DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED)
782 DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED)
783 DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED)
784 DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED)
786 /* Default template for device attributes. May NOT be modified */
787 static struct attribute *scsi_sdev_attrs[] = {
788 &dev_attr_device_blocked.attr,
790 &dev_attr_scsi_level.attr,
791 &dev_attr_device_busy.attr,
792 &dev_attr_vendor.attr,
793 &dev_attr_model.attr,
795 &dev_attr_rescan.attr,
796 &dev_attr_delete.attr,
797 &dev_attr_state.attr,
798 &dev_attr_timeout.attr,
799 &dev_attr_eh_timeout.attr,
800 &dev_attr_iocounterbits.attr,
801 &dev_attr_iorequest_cnt.attr,
802 &dev_attr_iodone_cnt.attr,
803 &dev_attr_ioerr_cnt.attr,
804 &dev_attr_modalias.attr,
805 REF_EVT(media_change),
806 REF_EVT(inquiry_change_reported),
807 REF_EVT(capacity_change_reported),
808 REF_EVT(soft_threshold_reached),
809 REF_EVT(mode_parameter_change_reported),
810 REF_EVT(lun_change_reported),
814 static struct attribute_group scsi_sdev_attr_group = {
815 .attrs = scsi_sdev_attrs,
818 static const struct attribute_group *scsi_sdev_attr_groups[] = {
819 &scsi_sdev_attr_group,
824 sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr,
825 const char *buf, size_t count)
828 struct scsi_device *sdev = to_scsi_device(dev);
829 struct scsi_host_template *sht = sdev->host->hostt;
831 if (!sht->change_queue_depth)
834 depth = simple_strtoul(buf, NULL, 0);
839 retval = sht->change_queue_depth(sdev, depth,
840 SCSI_QDEPTH_DEFAULT);
844 sdev->max_queue_depth = sdev->queue_depth;
849 static struct device_attribute sdev_attr_queue_depth_rw =
850 __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth,
851 sdev_store_queue_depth_rw);
854 sdev_show_queue_ramp_up_period(struct device *dev,
855 struct device_attribute *attr,
858 struct scsi_device *sdev;
859 sdev = to_scsi_device(dev);
860 return snprintf(buf, 20, "%u\n",
861 jiffies_to_msecs(sdev->queue_ramp_up_period));
865 sdev_store_queue_ramp_up_period(struct device *dev,
866 struct device_attribute *attr,
867 const char *buf, size_t count)
869 struct scsi_device *sdev = to_scsi_device(dev);
870 unsigned long period;
872 if (strict_strtoul(buf, 10, &period))
875 sdev->queue_ramp_up_period = msecs_to_jiffies(period);
879 static struct device_attribute sdev_attr_queue_ramp_up_period =
880 __ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR,
881 sdev_show_queue_ramp_up_period,
882 sdev_store_queue_ramp_up_period);
885 sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr,
886 const char *buf, size_t count)
888 struct scsi_device *sdev = to_scsi_device(dev);
889 struct scsi_host_template *sht = sdev->host->hostt;
890 int tag_type = 0, retval;
891 int prev_tag_type = scsi_get_tag_type(sdev);
893 if (!sdev->tagged_supported || !sht->change_queue_type)
896 if (strncmp(buf, "ordered", 7) == 0)
897 tag_type = MSG_ORDERED_TAG;
898 else if (strncmp(buf, "simple", 6) == 0)
899 tag_type = MSG_SIMPLE_TAG;
900 else if (strncmp(buf, "none", 4) != 0)
903 if (tag_type == prev_tag_type)
906 retval = sht->change_queue_type(sdev, tag_type);
913 static int scsi_target_add(struct scsi_target *starget)
917 if (starget->state != STARGET_CREATED)
920 error = device_add(&starget->dev);
922 dev_err(&starget->dev, "target device_add failed, error %d\n", error);
925 transport_add_device(&starget->dev);
926 starget->state = STARGET_RUNNING;
928 pm_runtime_set_active(&starget->dev);
929 pm_runtime_enable(&starget->dev);
930 device_enable_async_suspend(&starget->dev);
935 static struct device_attribute sdev_attr_queue_type_rw =
936 __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field,
937 sdev_store_queue_type_rw);
940 * scsi_sysfs_add_sdev - add scsi device to sysfs
941 * @sdev: scsi_device to add
944 * 0 on Success / non-zero on Failure
946 int scsi_sysfs_add_sdev(struct scsi_device *sdev)
949 struct request_queue *rq = sdev->request_queue;
950 struct scsi_target *starget = sdev->sdev_target;
952 error = scsi_device_set_state(sdev, SDEV_RUNNING);
956 error = scsi_target_add(starget);
960 transport_configure_device(&starget->dev);
962 device_enable_async_suspend(&sdev->sdev_gendev);
963 scsi_autopm_get_target(starget);
964 pm_runtime_set_active(&sdev->sdev_gendev);
965 pm_runtime_forbid(&sdev->sdev_gendev);
966 pm_runtime_enable(&sdev->sdev_gendev);
967 scsi_autopm_put_target(starget);
969 /* The following call will keep sdev active indefinitely, until
970 * its driver does a corresponding scsi_autopm_pm_device(). Only
971 * drivers supporting autosuspend will do this.
973 scsi_autopm_get_device(sdev);
975 error = device_add(&sdev->sdev_gendev);
977 sdev_printk(KERN_INFO, sdev,
978 "failed to add device: %d\n", error);
981 device_enable_async_suspend(&sdev->sdev_dev);
982 error = device_add(&sdev->sdev_dev);
984 sdev_printk(KERN_INFO, sdev,
985 "failed to add class device: %d\n", error);
986 device_del(&sdev->sdev_gendev);
989 transport_add_device(&sdev->sdev_gendev);
990 sdev->is_visible = 1;
992 /* create queue files, which may be writable, depending on the host */
993 if (sdev->host->hostt->change_queue_depth) {
994 error = device_create_file(&sdev->sdev_gendev,
995 &sdev_attr_queue_depth_rw);
996 error = device_create_file(&sdev->sdev_gendev,
997 &sdev_attr_queue_ramp_up_period);
1000 error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_depth);
1004 if (sdev->host->hostt->change_queue_type)
1005 error = device_create_file(&sdev->sdev_gendev, &sdev_attr_queue_type_rw);
1007 error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_type);
1011 error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL);
1014 /* we're treating error on bsg register as non-fatal,
1015 * so pretend nothing went wrong */
1016 sdev_printk(KERN_INFO, sdev,
1017 "Failed to register bsg queue, errno=%d\n", error);
1019 /* add additional host specific attributes */
1020 if (sdev->host->hostt->sdev_attrs) {
1021 for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) {
1022 error = device_create_file(&sdev->sdev_gendev,
1023 sdev->host->hostt->sdev_attrs[i]);
1032 void __scsi_remove_device(struct scsi_device *sdev)
1034 struct device *dev = &sdev->sdev_gendev;
1036 if (sdev->is_visible) {
1037 if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0)
1040 bsg_unregister_queue(sdev->request_queue);
1041 device_unregister(&sdev->sdev_dev);
1042 transport_remove_device(dev);
1045 put_device(&sdev->sdev_dev);
1048 * Stop accepting new requests and wait until all queuecommand() and
1049 * scsi_run_queue() invocations have finished before tearing down the
1052 scsi_device_set_state(sdev, SDEV_DEL);
1053 blk_cleanup_queue(sdev->request_queue);
1054 cancel_work_sync(&sdev->requeue_work);
1056 if (sdev->host->hostt->slave_destroy)
1057 sdev->host->hostt->slave_destroy(sdev);
1058 transport_destroy_device(dev);
1064 * scsi_remove_device - unregister a device from the scsi bus
1065 * @sdev: scsi_device to unregister
1067 void scsi_remove_device(struct scsi_device *sdev)
1069 struct Scsi_Host *shost = sdev->host;
1071 mutex_lock(&shost->scan_mutex);
1072 __scsi_remove_device(sdev);
1073 mutex_unlock(&shost->scan_mutex);
1075 EXPORT_SYMBOL(scsi_remove_device);
1077 static void __scsi_remove_target(struct scsi_target *starget)
1079 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1080 unsigned long flags;
1081 struct scsi_device *sdev;
1083 spin_lock_irqsave(shost->host_lock, flags);
1085 list_for_each_entry(sdev, &shost->__devices, siblings) {
1086 if (sdev->channel != starget->channel ||
1087 sdev->id != starget->id ||
1088 scsi_device_get(sdev))
1090 spin_unlock_irqrestore(shost->host_lock, flags);
1091 scsi_remove_device(sdev);
1092 scsi_device_put(sdev);
1093 spin_lock_irqsave(shost->host_lock, flags);
1096 spin_unlock_irqrestore(shost->host_lock, flags);
1100 * scsi_remove_target - try to remove a target and all its devices
1101 * @dev: generic starget or parent of generic stargets to be removed
1103 * Note: This is slightly racy. It is possible that if the user
1104 * requests the addition of another device then the target won't be
1107 void scsi_remove_target(struct device *dev)
1109 struct Scsi_Host *shost = dev_to_shost(dev->parent);
1110 struct scsi_target *starget, *last = NULL;
1111 unsigned long flags;
1113 /* remove targets being careful to lookup next entry before
1116 spin_lock_irqsave(shost->host_lock, flags);
1117 list_for_each_entry(starget, &shost->__targets, siblings) {
1118 if (starget->state == STARGET_DEL)
1120 if (starget->dev.parent == dev || &starget->dev == dev) {
1121 /* assuming new targets arrive at the end */
1122 starget->reap_ref++;
1123 spin_unlock_irqrestore(shost->host_lock, flags);
1125 scsi_target_reap(last);
1127 __scsi_remove_target(starget);
1128 spin_lock_irqsave(shost->host_lock, flags);
1131 spin_unlock_irqrestore(shost->host_lock, flags);
1134 scsi_target_reap(last);
1136 EXPORT_SYMBOL(scsi_remove_target);
1138 int scsi_register_driver(struct device_driver *drv)
1140 drv->bus = &scsi_bus_type;
1142 return driver_register(drv);
1144 EXPORT_SYMBOL(scsi_register_driver);
1146 int scsi_register_interface(struct class_interface *intf)
1148 intf->class = &sdev_class;
1150 return class_interface_register(intf);
1152 EXPORT_SYMBOL(scsi_register_interface);
1155 * scsi_sysfs_add_host - add scsi host to subsystem
1156 * @shost: scsi host struct to add to subsystem
1158 int scsi_sysfs_add_host(struct Scsi_Host *shost)
1162 /* add host specific attributes */
1163 if (shost->hostt->shost_attrs) {
1164 for (i = 0; shost->hostt->shost_attrs[i]; i++) {
1165 error = device_create_file(&shost->shost_dev,
1166 shost->hostt->shost_attrs[i]);
1172 transport_register_device(&shost->shost_gendev);
1173 transport_configure_device(&shost->shost_gendev);
1177 static struct device_type scsi_dev_type = {
1178 .name = "scsi_device",
1179 .release = scsi_device_dev_release,
1180 .groups = scsi_sdev_attr_groups,
1183 void scsi_sysfs_device_initialize(struct scsi_device *sdev)
1185 unsigned long flags;
1186 struct Scsi_Host *shost = sdev->host;
1187 struct scsi_target *starget = sdev->sdev_target;
1189 device_initialize(&sdev->sdev_gendev);
1190 sdev->sdev_gendev.bus = &scsi_bus_type;
1191 sdev->sdev_gendev.type = &scsi_dev_type;
1192 dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%d",
1193 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1195 device_initialize(&sdev->sdev_dev);
1196 sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev);
1197 sdev->sdev_dev.class = &sdev_class;
1198 dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%d",
1199 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1200 sdev->scsi_level = starget->scsi_level;
1201 transport_setup_device(&sdev->sdev_gendev);
1202 spin_lock_irqsave(shost->host_lock, flags);
1203 list_add_tail(&sdev->same_target_siblings, &starget->devices);
1204 list_add_tail(&sdev->siblings, &shost->__devices);
1205 spin_unlock_irqrestore(shost->host_lock, flags);
1208 int scsi_is_sdev_device(const struct device *dev)
1210 return dev->type == &scsi_dev_type;
1212 EXPORT_SYMBOL(scsi_is_sdev_device);
1214 /* A blank transport template that is used in drivers that don't
1215 * yet implement Transport Attributes */
1216 struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, };