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->vpd_pg83);
416 kfree(sdev->vpd_pg80);
417 kfree(sdev->inquiry);
424 static void scsi_device_dev_release(struct device *dev)
426 struct scsi_device *sdp = to_scsi_device(dev);
427 execute_in_process_context(scsi_device_dev_release_usercontext,
431 static struct class sdev_class = {
432 .name = "scsi_device",
433 .dev_release = scsi_device_cls_release,
436 /* all probing is done in the individual ->probe routines */
437 static int scsi_bus_match(struct device *dev, struct device_driver *gendrv)
439 struct scsi_device *sdp;
441 if (dev->type != &scsi_dev_type)
444 sdp = to_scsi_device(dev);
445 if (sdp->no_uld_attach)
447 return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0;
450 static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
452 struct scsi_device *sdev;
454 if (dev->type != &scsi_dev_type)
457 sdev = to_scsi_device(dev);
459 add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type);
463 struct bus_type scsi_bus_type = {
465 .match = scsi_bus_match,
466 .uevent = scsi_bus_uevent,
468 .pm = &scsi_bus_pm_ops,
471 EXPORT_SYMBOL_GPL(scsi_bus_type);
473 int scsi_sysfs_register(void)
477 error = bus_register(&scsi_bus_type);
479 error = class_register(&sdev_class);
481 bus_unregister(&scsi_bus_type);
487 void scsi_sysfs_unregister(void)
489 class_unregister(&sdev_class);
490 bus_unregister(&scsi_bus_type);
494 * sdev_show_function: macro to create an attr function that can be used to
495 * show a non-bit field.
497 #define sdev_show_function(field, format_string) \
499 sdev_show_##field (struct device *dev, struct device_attribute *attr, \
502 struct scsi_device *sdev; \
503 sdev = to_scsi_device(dev); \
504 return snprintf (buf, 20, format_string, sdev->field); \
508 * sdev_rd_attr: macro to create a function and attribute variable for a
511 #define sdev_rd_attr(field, format_string) \
512 sdev_show_function(field, format_string) \
513 static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL);
517 * sdev_rw_attr: create a function and attribute variable for a
520 #define sdev_rw_attr(field, format_string) \
521 sdev_show_function(field, format_string) \
524 sdev_store_##field (struct device *dev, struct device_attribute *attr, \
525 const char *buf, size_t count) \
527 struct scsi_device *sdev; \
528 sdev = to_scsi_device(dev); \
529 sscanf (buf, format_string, &sdev->field); \
532 static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
534 /* Currently we don't export bit fields, but we might in future,
535 * so leave this code in */
538 * sdev_rd_attr: create a function and attribute variable for a
539 * read/write bit field.
541 #define sdev_rw_attr_bit(field) \
542 sdev_show_function(field, "%d\n") \
545 sdev_store_##field (struct device *dev, struct device_attribute *attr, \
546 const char *buf, size_t count) \
549 struct scsi_device *sdev; \
550 ret = scsi_sdev_check_buf_bit(buf); \
552 sdev = to_scsi_device(dev); \
558 static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
561 * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1",
562 * else return -EINVAL.
564 static int scsi_sdev_check_buf_bit(const char *buf)
566 if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
569 else if (buf[0] == '0')
578 * Create the actual show/store functions and data structures.
580 sdev_rd_attr (device_blocked, "%d\n");
581 sdev_rd_attr (device_busy, "%d\n");
582 sdev_rd_attr (type, "%d\n");
583 sdev_rd_attr (scsi_level, "%d\n");
584 sdev_rd_attr (vendor, "%.8s\n");
585 sdev_rd_attr (model, "%.16s\n");
586 sdev_rd_attr (rev, "%.4s\n");
589 * TODO: can we make these symlinks to the block layer ones?
592 sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf)
594 struct scsi_device *sdev;
595 sdev = to_scsi_device(dev);
596 return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ);
600 sdev_store_timeout (struct device *dev, struct device_attribute *attr,
601 const char *buf, size_t count)
603 struct scsi_device *sdev;
605 sdev = to_scsi_device(dev);
606 sscanf (buf, "%d\n", &timeout);
607 blk_queue_rq_timeout(sdev->request_queue, timeout * HZ);
610 static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout);
613 sdev_show_eh_timeout(struct device *dev, struct device_attribute *attr, char *buf)
615 struct scsi_device *sdev;
616 sdev = to_scsi_device(dev);
617 return snprintf(buf, 20, "%u\n", sdev->eh_timeout / HZ);
621 sdev_store_eh_timeout(struct device *dev, struct device_attribute *attr,
622 const char *buf, size_t count)
624 struct scsi_device *sdev;
625 unsigned int eh_timeout;
628 if (!capable(CAP_SYS_ADMIN))
631 sdev = to_scsi_device(dev);
632 err = kstrtouint(buf, 10, &eh_timeout);
635 sdev->eh_timeout = eh_timeout * HZ;
639 static DEVICE_ATTR(eh_timeout, S_IRUGO | S_IWUSR, sdev_show_eh_timeout, sdev_store_eh_timeout);
642 store_rescan_field (struct device *dev, struct device_attribute *attr,
643 const char *buf, size_t count)
645 scsi_rescan_device(dev);
648 static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field);
651 sdev_store_delete(struct device *dev, struct device_attribute *attr,
652 const char *buf, size_t count)
654 if (device_remove_file_self(dev, attr))
655 scsi_remove_device(to_scsi_device(dev));
658 static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete);
661 store_state_field(struct device *dev, struct device_attribute *attr,
662 const char *buf, size_t count)
665 struct scsi_device *sdev = to_scsi_device(dev);
666 enum scsi_device_state state = 0;
668 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
669 const int len = strlen(sdev_states[i].name);
670 if (strncmp(sdev_states[i].name, buf, len) == 0 &&
672 state = sdev_states[i].value;
679 if (scsi_device_set_state(sdev, state))
685 show_state_field(struct device *dev, struct device_attribute *attr, char *buf)
687 struct scsi_device *sdev = to_scsi_device(dev);
688 const char *name = scsi_device_state_name(sdev->sdev_state);
693 return snprintf(buf, 20, "%s\n", name);
696 static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field);
699 show_queue_type_field(struct device *dev, struct device_attribute *attr,
702 struct scsi_device *sdev = to_scsi_device(dev);
703 const char *name = "none";
705 if (sdev->ordered_tags)
707 else if (sdev->simple_tags)
710 return snprintf(buf, 20, "%s\n", name);
714 store_queue_type_field(struct device *dev, struct device_attribute *attr,
715 const char *buf, size_t count)
717 struct scsi_device *sdev = to_scsi_device(dev);
718 struct scsi_host_template *sht = sdev->host->hostt;
719 int tag_type = 0, retval;
720 int prev_tag_type = scsi_get_tag_type(sdev);
722 if (!sdev->tagged_supported || !sht->change_queue_type)
725 if (strncmp(buf, "ordered", 7) == 0)
726 tag_type = MSG_ORDERED_TAG;
727 else if (strncmp(buf, "simple", 6) == 0)
728 tag_type = MSG_SIMPLE_TAG;
729 else if (strncmp(buf, "none", 4) != 0)
732 if (tag_type == prev_tag_type)
735 retval = sht->change_queue_type(sdev, tag_type);
742 static DEVICE_ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field,
743 store_queue_type_field);
745 #define sdev_vpd_pg_attr(_page) \
747 show_vpd_##_page(struct file *filp, struct kobject *kobj, \
748 struct bin_attribute *bin_attr, \
749 char *buf, loff_t off, size_t count) \
751 struct device *dev = container_of(kobj, struct device, kobj); \
752 struct scsi_device *sdev = to_scsi_device(dev); \
753 if (!sdev->vpd_##_page) \
755 return memory_read_from_buffer(buf, count, &off, \
757 sdev->vpd_##_page##_len); \
759 static struct bin_attribute dev_attr_vpd_##_page = { \
760 .attr = {.name = __stringify(vpd_##_page), .mode = S_IRUGO }, \
762 .read = show_vpd_##_page, \
765 sdev_vpd_pg_attr(pg83);
766 sdev_vpd_pg_attr(pg80);
769 show_iostat_counterbits(struct device *dev, struct device_attribute *attr,
772 return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8);
775 static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL);
777 #define show_sdev_iostat(field) \
779 show_iostat_##field(struct device *dev, struct device_attribute *attr, \
782 struct scsi_device *sdev = to_scsi_device(dev); \
783 unsigned long long count = atomic_read(&sdev->field); \
784 return snprintf(buf, 20, "0x%llx\n", count); \
786 static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL)
788 show_sdev_iostat(iorequest_cnt);
789 show_sdev_iostat(iodone_cnt);
790 show_sdev_iostat(ioerr_cnt);
793 sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
795 struct scsi_device *sdev;
796 sdev = to_scsi_device(dev);
797 return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type);
799 static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL);
801 #define DECLARE_EVT_SHOW(name, Cap_name) \
803 sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \
806 struct scsi_device *sdev = to_scsi_device(dev); \
807 int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\
808 return snprintf(buf, 20, "%d\n", val); \
811 #define DECLARE_EVT_STORE(name, Cap_name) \
813 sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\
814 const char *buf, size_t count) \
816 struct scsi_device *sdev = to_scsi_device(dev); \
817 int val = simple_strtoul(buf, NULL, 0); \
819 clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
821 set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
827 #define DECLARE_EVT(name, Cap_name) \
828 DECLARE_EVT_SHOW(name, Cap_name) \
829 DECLARE_EVT_STORE(name, Cap_name) \
830 static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \
831 sdev_store_evt_##name);
832 #define REF_EVT(name) &dev_attr_evt_##name.attr
834 DECLARE_EVT(media_change, MEDIA_CHANGE)
835 DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED)
836 DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED)
837 DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED)
838 DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED)
839 DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED)
842 sdev_store_queue_depth(struct device *dev, struct device_attribute *attr,
843 const char *buf, size_t count)
846 struct scsi_device *sdev = to_scsi_device(dev);
847 struct scsi_host_template *sht = sdev->host->hostt;
849 if (!sht->change_queue_depth)
852 depth = simple_strtoul(buf, NULL, 0);
857 retval = sht->change_queue_depth(sdev, depth,
858 SCSI_QDEPTH_DEFAULT);
862 sdev->max_queue_depth = sdev->queue_depth;
866 sdev_show_function(queue_depth, "%d\n");
868 static DEVICE_ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth,
869 sdev_store_queue_depth);
872 sdev_show_queue_ramp_up_period(struct device *dev,
873 struct device_attribute *attr,
876 struct scsi_device *sdev;
877 sdev = to_scsi_device(dev);
878 return snprintf(buf, 20, "%u\n",
879 jiffies_to_msecs(sdev->queue_ramp_up_period));
883 sdev_store_queue_ramp_up_period(struct device *dev,
884 struct device_attribute *attr,
885 const char *buf, size_t count)
887 struct scsi_device *sdev = to_scsi_device(dev);
888 unsigned long period;
890 if (strict_strtoul(buf, 10, &period))
893 sdev->queue_ramp_up_period = msecs_to_jiffies(period);
897 static DEVICE_ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR,
898 sdev_show_queue_ramp_up_period,
899 sdev_store_queue_ramp_up_period);
901 static umode_t scsi_sdev_attr_is_visible(struct kobject *kobj,
902 struct attribute *attr, int i)
904 struct device *dev = container_of(kobj, struct device, kobj);
905 struct scsi_device *sdev = to_scsi_device(dev);
908 if (attr == &dev_attr_queue_depth.attr &&
909 !sdev->host->hostt->change_queue_depth)
912 if (attr == &dev_attr_queue_ramp_up_period.attr &&
913 !sdev->host->hostt->change_queue_depth)
916 if (attr == &dev_attr_queue_type.attr &&
917 !sdev->host->hostt->change_queue_type)
923 /* Default template for device attributes. May NOT be modified */
924 static struct attribute *scsi_sdev_attrs[] = {
925 &dev_attr_device_blocked.attr,
927 &dev_attr_scsi_level.attr,
928 &dev_attr_device_busy.attr,
929 &dev_attr_vendor.attr,
930 &dev_attr_model.attr,
932 &dev_attr_rescan.attr,
933 &dev_attr_delete.attr,
934 &dev_attr_state.attr,
935 &dev_attr_timeout.attr,
936 &dev_attr_eh_timeout.attr,
937 &dev_attr_iocounterbits.attr,
938 &dev_attr_iorequest_cnt.attr,
939 &dev_attr_iodone_cnt.attr,
940 &dev_attr_ioerr_cnt.attr,
941 &dev_attr_modalias.attr,
942 &dev_attr_queue_depth.attr,
943 &dev_attr_queue_type.attr,
944 &dev_attr_queue_ramp_up_period.attr,
945 REF_EVT(media_change),
946 REF_EVT(inquiry_change_reported),
947 REF_EVT(capacity_change_reported),
948 REF_EVT(soft_threshold_reached),
949 REF_EVT(mode_parameter_change_reported),
950 REF_EVT(lun_change_reported),
954 static struct bin_attribute *scsi_sdev_bin_attrs[] = {
959 static struct attribute_group scsi_sdev_attr_group = {
960 .attrs = scsi_sdev_attrs,
961 .bin_attrs = scsi_sdev_bin_attrs,
962 .is_visible = scsi_sdev_attr_is_visible,
965 static const struct attribute_group *scsi_sdev_attr_groups[] = {
966 &scsi_sdev_attr_group,
970 static int scsi_target_add(struct scsi_target *starget)
974 if (starget->state != STARGET_CREATED)
977 error = device_add(&starget->dev);
979 dev_err(&starget->dev, "target device_add failed, error %d\n", error);
982 transport_add_device(&starget->dev);
983 starget->state = STARGET_RUNNING;
985 pm_runtime_set_active(&starget->dev);
986 pm_runtime_enable(&starget->dev);
987 device_enable_async_suspend(&starget->dev);
993 * scsi_sysfs_add_sdev - add scsi device to sysfs
994 * @sdev: scsi_device to add
997 * 0 on Success / non-zero on Failure
999 int scsi_sysfs_add_sdev(struct scsi_device *sdev)
1002 struct request_queue *rq = sdev->request_queue;
1003 struct scsi_target *starget = sdev->sdev_target;
1005 error = scsi_device_set_state(sdev, SDEV_RUNNING);
1009 error = scsi_target_add(starget);
1013 transport_configure_device(&starget->dev);
1015 device_enable_async_suspend(&sdev->sdev_gendev);
1016 scsi_autopm_get_target(starget);
1017 pm_runtime_set_active(&sdev->sdev_gendev);
1018 pm_runtime_forbid(&sdev->sdev_gendev);
1019 pm_runtime_enable(&sdev->sdev_gendev);
1020 scsi_autopm_put_target(starget);
1022 /* The following call will keep sdev active indefinitely, until
1023 * its driver does a corresponding scsi_autopm_pm_device(). Only
1024 * drivers supporting autosuspend will do this.
1026 scsi_autopm_get_device(sdev);
1028 error = device_add(&sdev->sdev_gendev);
1030 sdev_printk(KERN_INFO, sdev,
1031 "failed to add device: %d\n", error);
1034 device_enable_async_suspend(&sdev->sdev_dev);
1035 error = device_add(&sdev->sdev_dev);
1037 sdev_printk(KERN_INFO, sdev,
1038 "failed to add class device: %d\n", error);
1039 device_del(&sdev->sdev_gendev);
1042 transport_add_device(&sdev->sdev_gendev);
1043 sdev->is_visible = 1;
1045 error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL);
1048 /* we're treating error on bsg register as non-fatal,
1049 * so pretend nothing went wrong */
1050 sdev_printk(KERN_INFO, sdev,
1051 "Failed to register bsg queue, errno=%d\n", error);
1053 /* add additional host specific attributes */
1054 if (sdev->host->hostt->sdev_attrs) {
1055 for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) {
1056 error = device_create_file(&sdev->sdev_gendev,
1057 sdev->host->hostt->sdev_attrs[i]);
1066 void __scsi_remove_device(struct scsi_device *sdev)
1068 struct device *dev = &sdev->sdev_gendev;
1070 if (sdev->is_visible) {
1071 if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0)
1074 bsg_unregister_queue(sdev->request_queue);
1075 device_unregister(&sdev->sdev_dev);
1076 transport_remove_device(dev);
1079 put_device(&sdev->sdev_dev);
1082 * Stop accepting new requests and wait until all queuecommand() and
1083 * scsi_run_queue() invocations have finished before tearing down the
1086 scsi_device_set_state(sdev, SDEV_DEL);
1087 blk_cleanup_queue(sdev->request_queue);
1088 cancel_work_sync(&sdev->requeue_work);
1090 if (sdev->host->hostt->slave_destroy)
1091 sdev->host->hostt->slave_destroy(sdev);
1092 transport_destroy_device(dev);
1095 * Paired with the kref_get() in scsi_sysfs_initialize(). We have
1096 * remoed sysfs visibility from the device, so make the target
1097 * invisible if this was the last device underneath it.
1099 scsi_target_reap(scsi_target(sdev));
1105 * scsi_remove_device - unregister a device from the scsi bus
1106 * @sdev: scsi_device to unregister
1108 void scsi_remove_device(struct scsi_device *sdev)
1110 struct Scsi_Host *shost = sdev->host;
1112 mutex_lock(&shost->scan_mutex);
1113 __scsi_remove_device(sdev);
1114 mutex_unlock(&shost->scan_mutex);
1116 EXPORT_SYMBOL(scsi_remove_device);
1118 static void __scsi_remove_target(struct scsi_target *starget)
1120 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1121 unsigned long flags;
1122 struct scsi_device *sdev;
1124 spin_lock_irqsave(shost->host_lock, flags);
1126 list_for_each_entry(sdev, &shost->__devices, siblings) {
1127 if (sdev->channel != starget->channel ||
1128 sdev->id != starget->id ||
1129 scsi_device_get(sdev))
1131 spin_unlock_irqrestore(shost->host_lock, flags);
1132 scsi_remove_device(sdev);
1133 scsi_device_put(sdev);
1134 spin_lock_irqsave(shost->host_lock, flags);
1137 spin_unlock_irqrestore(shost->host_lock, flags);
1141 * scsi_remove_target - try to remove a target and all its devices
1142 * @dev: generic starget or parent of generic stargets to be removed
1144 * Note: This is slightly racy. It is possible that if the user
1145 * requests the addition of another device then the target won't be
1148 void scsi_remove_target(struct device *dev)
1150 struct Scsi_Host *shost = dev_to_shost(dev->parent);
1151 struct scsi_target *starget, *last = NULL;
1152 unsigned long flags;
1154 /* remove targets being careful to lookup next entry before
1157 spin_lock_irqsave(shost->host_lock, flags);
1158 list_for_each_entry(starget, &shost->__targets, siblings) {
1159 if (starget->state == STARGET_DEL)
1161 if (starget->dev.parent == dev || &starget->dev == dev) {
1162 /* assuming new targets arrive at the end */
1163 kref_get(&starget->reap_ref);
1164 spin_unlock_irqrestore(shost->host_lock, flags);
1166 scsi_target_reap(last);
1168 __scsi_remove_target(starget);
1169 spin_lock_irqsave(shost->host_lock, flags);
1172 spin_unlock_irqrestore(shost->host_lock, flags);
1175 scsi_target_reap(last);
1177 EXPORT_SYMBOL(scsi_remove_target);
1179 int scsi_register_driver(struct device_driver *drv)
1181 drv->bus = &scsi_bus_type;
1183 return driver_register(drv);
1185 EXPORT_SYMBOL(scsi_register_driver);
1187 int scsi_register_interface(struct class_interface *intf)
1189 intf->class = &sdev_class;
1191 return class_interface_register(intf);
1193 EXPORT_SYMBOL(scsi_register_interface);
1196 * scsi_sysfs_add_host - add scsi host to subsystem
1197 * @shost: scsi host struct to add to subsystem
1199 int scsi_sysfs_add_host(struct Scsi_Host *shost)
1203 /* add host specific attributes */
1204 if (shost->hostt->shost_attrs) {
1205 for (i = 0; shost->hostt->shost_attrs[i]; i++) {
1206 error = device_create_file(&shost->shost_dev,
1207 shost->hostt->shost_attrs[i]);
1213 transport_register_device(&shost->shost_gendev);
1214 transport_configure_device(&shost->shost_gendev);
1218 static struct device_type scsi_dev_type = {
1219 .name = "scsi_device",
1220 .release = scsi_device_dev_release,
1221 .groups = scsi_sdev_attr_groups,
1224 void scsi_sysfs_device_initialize(struct scsi_device *sdev)
1226 unsigned long flags;
1227 struct Scsi_Host *shost = sdev->host;
1228 struct scsi_target *starget = sdev->sdev_target;
1230 device_initialize(&sdev->sdev_gendev);
1231 sdev->sdev_gendev.bus = &scsi_bus_type;
1232 sdev->sdev_gendev.type = &scsi_dev_type;
1233 dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%d",
1234 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1236 device_initialize(&sdev->sdev_dev);
1237 sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev);
1238 sdev->sdev_dev.class = &sdev_class;
1239 dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%d",
1240 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1241 sdev->scsi_level = starget->scsi_level;
1242 transport_setup_device(&sdev->sdev_gendev);
1243 spin_lock_irqsave(shost->host_lock, flags);
1244 list_add_tail(&sdev->same_target_siblings, &starget->devices);
1245 list_add_tail(&sdev->siblings, &shost->__devices);
1246 spin_unlock_irqrestore(shost->host_lock, flags);
1248 * device can now only be removed via __scsi_remove_device() so hold
1249 * the target. Target will be held in CREATED state until something
1250 * beneath it becomes visible (in which case it moves to RUNNING)
1252 kref_get(&starget->reap_ref);
1255 int scsi_is_sdev_device(const struct device *dev)
1257 return dev->type == &scsi_dev_type;
1259 EXPORT_SYMBOL(scsi_is_sdev_device);
1261 /* A blank transport template that is used in drivers that don't
1262 * yet implement Transport Attributes */
1263 struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, };