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 long long *val, char *src)
87 if (strncmp(src, "-", 20) == 0) {
88 *val = SCAN_WILD_CARD;
91 * Doesn't check for int overflow
93 *val = simple_strtoull(src, &last, 0);
100 static int scsi_scan(struct Scsi_Host *shost, const char *str)
102 char s1[15], s2[15], s3[17], junk;
103 unsigned long long channel, id, lun;
106 res = sscanf(str, "%10s %10s %16s %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(use_blk_mq, "%d\n");
337 shost_rd_attr(unique_id, "%u\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");
348 show_host_busy(struct device *dev, struct device_attribute *attr, char *buf)
350 struct Scsi_Host *shost = class_to_shost(dev);
351 return snprintf(buf, 20, "%d\n", atomic_read(&shost->host_busy));
353 static DEVICE_ATTR(host_busy, S_IRUGO, show_host_busy, NULL);
355 static struct attribute *scsi_sysfs_shost_attrs[] = {
356 &dev_attr_use_blk_mq.attr,
357 &dev_attr_unique_id.attr,
358 &dev_attr_host_busy.attr,
359 &dev_attr_cmd_per_lun.attr,
360 &dev_attr_can_queue.attr,
361 &dev_attr_sg_tablesize.attr,
362 &dev_attr_sg_prot_tablesize.attr,
363 &dev_attr_unchecked_isa_dma.attr,
364 &dev_attr_proc_name.attr,
366 &dev_attr_hstate.attr,
367 &dev_attr_supported_mode.attr,
368 &dev_attr_active_mode.attr,
369 &dev_attr_prot_capabilities.attr,
370 &dev_attr_prot_guard_type.attr,
371 &dev_attr_host_reset.attr,
372 &dev_attr_eh_deadline.attr,
376 struct attribute_group scsi_shost_attr_group = {
377 .attrs = scsi_sysfs_shost_attrs,
380 const struct attribute_group *scsi_sysfs_shost_attr_groups[] = {
381 &scsi_shost_attr_group,
385 static void scsi_device_cls_release(struct device *class_dev)
387 struct scsi_device *sdev;
389 sdev = class_to_sdev(class_dev);
390 put_device(&sdev->sdev_gendev);
393 static void scsi_device_dev_release_usercontext(struct work_struct *work)
395 struct scsi_device *sdev;
396 struct device *parent;
397 struct list_head *this, *tmp;
400 sdev = container_of(work, struct scsi_device, ew.work);
402 parent = sdev->sdev_gendev.parent;
404 spin_lock_irqsave(sdev->host->host_lock, flags);
405 list_del(&sdev->siblings);
406 list_del(&sdev->same_target_siblings);
407 list_del(&sdev->starved_entry);
408 spin_unlock_irqrestore(sdev->host->host_lock, flags);
410 cancel_work_sync(&sdev->event_work);
412 list_for_each_safe(this, tmp, &sdev->event_list) {
413 struct scsi_event *evt;
415 evt = list_entry(this, struct scsi_event, node);
416 list_del(&evt->node);
420 blk_put_queue(sdev->request_queue);
421 /* NULL queue means the device can't be used */
422 sdev->request_queue = NULL;
424 kfree(sdev->vpd_pg83);
425 kfree(sdev->vpd_pg80);
426 kfree(sdev->inquiry);
433 static void scsi_device_dev_release(struct device *dev)
435 struct scsi_device *sdp = to_scsi_device(dev);
436 execute_in_process_context(scsi_device_dev_release_usercontext,
440 static struct class sdev_class = {
441 .name = "scsi_device",
442 .dev_release = scsi_device_cls_release,
445 /* all probing is done in the individual ->probe routines */
446 static int scsi_bus_match(struct device *dev, struct device_driver *gendrv)
448 struct scsi_device *sdp;
450 if (dev->type != &scsi_dev_type)
453 sdp = to_scsi_device(dev);
454 if (sdp->no_uld_attach)
456 return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0;
459 static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
461 struct scsi_device *sdev;
463 if (dev->type != &scsi_dev_type)
466 sdev = to_scsi_device(dev);
468 add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type);
472 struct bus_type scsi_bus_type = {
474 .match = scsi_bus_match,
475 .uevent = scsi_bus_uevent,
477 .pm = &scsi_bus_pm_ops,
480 EXPORT_SYMBOL_GPL(scsi_bus_type);
482 int scsi_sysfs_register(void)
486 error = bus_register(&scsi_bus_type);
488 error = class_register(&sdev_class);
490 bus_unregister(&scsi_bus_type);
496 void scsi_sysfs_unregister(void)
498 class_unregister(&sdev_class);
499 bus_unregister(&scsi_bus_type);
503 * sdev_show_function: macro to create an attr function that can be used to
504 * show a non-bit field.
506 #define sdev_show_function(field, format_string) \
508 sdev_show_##field (struct device *dev, struct device_attribute *attr, \
511 struct scsi_device *sdev; \
512 sdev = to_scsi_device(dev); \
513 return snprintf (buf, 20, format_string, sdev->field); \
517 * sdev_rd_attr: macro to create a function and attribute variable for a
520 #define sdev_rd_attr(field, format_string) \
521 sdev_show_function(field, format_string) \
522 static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL);
526 * sdev_rw_attr: create a function and attribute variable for a
529 #define sdev_rw_attr(field, format_string) \
530 sdev_show_function(field, format_string) \
533 sdev_store_##field (struct device *dev, struct device_attribute *attr, \
534 const char *buf, size_t count) \
536 struct scsi_device *sdev; \
537 sdev = to_scsi_device(dev); \
538 sscanf (buf, format_string, &sdev->field); \
541 static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
543 /* Currently we don't export bit fields, but we might in future,
544 * so leave this code in */
547 * sdev_rd_attr: create a function and attribute variable for a
548 * read/write bit field.
550 #define sdev_rw_attr_bit(field) \
551 sdev_show_function(field, "%d\n") \
554 sdev_store_##field (struct device *dev, struct device_attribute *attr, \
555 const char *buf, size_t count) \
558 struct scsi_device *sdev; \
559 ret = scsi_sdev_check_buf_bit(buf); \
561 sdev = to_scsi_device(dev); \
567 static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
570 * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1",
571 * else return -EINVAL.
573 static int scsi_sdev_check_buf_bit(const char *buf)
575 if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
578 else if (buf[0] == '0')
587 * Create the actual show/store functions and data structures.
589 sdev_rd_attr (type, "%d\n");
590 sdev_rd_attr (scsi_level, "%d\n");
591 sdev_rd_attr (vendor, "%.8s\n");
592 sdev_rd_attr (model, "%.16s\n");
593 sdev_rd_attr (rev, "%.4s\n");
596 sdev_show_device_busy(struct device *dev, struct device_attribute *attr,
599 struct scsi_device *sdev = to_scsi_device(dev);
600 return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_busy));
602 static DEVICE_ATTR(device_busy, S_IRUGO, sdev_show_device_busy, NULL);
605 sdev_show_device_blocked(struct device *dev, struct device_attribute *attr,
608 struct scsi_device *sdev = to_scsi_device(dev);
609 return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_blocked));
611 static DEVICE_ATTR(device_blocked, S_IRUGO, sdev_show_device_blocked, NULL);
614 * TODO: can we make these symlinks to the block layer ones?
617 sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf)
619 struct scsi_device *sdev;
620 sdev = to_scsi_device(dev);
621 return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ);
625 sdev_store_timeout (struct device *dev, struct device_attribute *attr,
626 const char *buf, size_t count)
628 struct scsi_device *sdev;
630 sdev = to_scsi_device(dev);
631 sscanf (buf, "%d\n", &timeout);
632 blk_queue_rq_timeout(sdev->request_queue, timeout * HZ);
635 static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout);
638 sdev_show_eh_timeout(struct device *dev, struct device_attribute *attr, char *buf)
640 struct scsi_device *sdev;
641 sdev = to_scsi_device(dev);
642 return snprintf(buf, 20, "%u\n", sdev->eh_timeout / HZ);
646 sdev_store_eh_timeout(struct device *dev, struct device_attribute *attr,
647 const char *buf, size_t count)
649 struct scsi_device *sdev;
650 unsigned int eh_timeout;
653 if (!capable(CAP_SYS_ADMIN))
656 sdev = to_scsi_device(dev);
657 err = kstrtouint(buf, 10, &eh_timeout);
660 sdev->eh_timeout = eh_timeout * HZ;
664 static DEVICE_ATTR(eh_timeout, S_IRUGO | S_IWUSR, sdev_show_eh_timeout, sdev_store_eh_timeout);
667 store_rescan_field (struct device *dev, struct device_attribute *attr,
668 const char *buf, size_t count)
670 scsi_rescan_device(dev);
673 static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field);
676 sdev_store_delete(struct device *dev, struct device_attribute *attr,
677 const char *buf, size_t count)
679 if (device_remove_file_self(dev, attr))
680 scsi_remove_device(to_scsi_device(dev));
683 static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete);
686 store_state_field(struct device *dev, struct device_attribute *attr,
687 const char *buf, size_t count)
690 struct scsi_device *sdev = to_scsi_device(dev);
691 enum scsi_device_state state = 0;
693 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
694 const int len = strlen(sdev_states[i].name);
695 if (strncmp(sdev_states[i].name, buf, len) == 0 &&
697 state = sdev_states[i].value;
704 if (scsi_device_set_state(sdev, state))
710 show_state_field(struct device *dev, struct device_attribute *attr, char *buf)
712 struct scsi_device *sdev = to_scsi_device(dev);
713 const char *name = scsi_device_state_name(sdev->sdev_state);
718 return snprintf(buf, 20, "%s\n", name);
721 static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field);
724 show_queue_type_field(struct device *dev, struct device_attribute *attr,
727 struct scsi_device *sdev = to_scsi_device(dev);
728 const char *name = "none";
730 if (sdev->ordered_tags)
732 else if (sdev->simple_tags)
735 return snprintf(buf, 20, "%s\n", name);
739 store_queue_type_field(struct device *dev, struct device_attribute *attr,
740 const char *buf, size_t count)
742 struct scsi_device *sdev = to_scsi_device(dev);
743 struct scsi_host_template *sht = sdev->host->hostt;
744 int tag_type = 0, retval;
745 int prev_tag_type = scsi_get_tag_type(sdev);
747 if (!sdev->tagged_supported || !sht->change_queue_type)
750 if (strncmp(buf, "ordered", 7) == 0)
751 tag_type = MSG_ORDERED_TAG;
752 else if (strncmp(buf, "simple", 6) == 0)
753 tag_type = MSG_SIMPLE_TAG;
754 else if (strncmp(buf, "none", 4) != 0)
757 if (tag_type == prev_tag_type)
760 retval = sht->change_queue_type(sdev, tag_type);
767 static DEVICE_ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field,
768 store_queue_type_field);
770 #define sdev_vpd_pg_attr(_page) \
772 show_vpd_##_page(struct file *filp, struct kobject *kobj, \
773 struct bin_attribute *bin_attr, \
774 char *buf, loff_t off, size_t count) \
776 struct device *dev = container_of(kobj, struct device, kobj); \
777 struct scsi_device *sdev = to_scsi_device(dev); \
778 if (!sdev->vpd_##_page) \
780 return memory_read_from_buffer(buf, count, &off, \
782 sdev->vpd_##_page##_len); \
784 static struct bin_attribute dev_attr_vpd_##_page = { \
785 .attr = {.name = __stringify(vpd_##_page), .mode = S_IRUGO }, \
787 .read = show_vpd_##_page, \
790 sdev_vpd_pg_attr(pg83);
791 sdev_vpd_pg_attr(pg80);
794 show_iostat_counterbits(struct device *dev, struct device_attribute *attr,
797 return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8);
800 static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL);
802 #define show_sdev_iostat(field) \
804 show_iostat_##field(struct device *dev, struct device_attribute *attr, \
807 struct scsi_device *sdev = to_scsi_device(dev); \
808 unsigned long long count = atomic_read(&sdev->field); \
809 return snprintf(buf, 20, "0x%llx\n", count); \
811 static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL)
813 show_sdev_iostat(iorequest_cnt);
814 show_sdev_iostat(iodone_cnt);
815 show_sdev_iostat(ioerr_cnt);
818 sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
820 struct scsi_device *sdev;
821 sdev = to_scsi_device(dev);
822 return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type);
824 static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL);
826 #define DECLARE_EVT_SHOW(name, Cap_name) \
828 sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \
831 struct scsi_device *sdev = to_scsi_device(dev); \
832 int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\
833 return snprintf(buf, 20, "%d\n", val); \
836 #define DECLARE_EVT_STORE(name, Cap_name) \
838 sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\
839 const char *buf, size_t count) \
841 struct scsi_device *sdev = to_scsi_device(dev); \
842 int val = simple_strtoul(buf, NULL, 0); \
844 clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
846 set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
852 #define DECLARE_EVT(name, Cap_name) \
853 DECLARE_EVT_SHOW(name, Cap_name) \
854 DECLARE_EVT_STORE(name, Cap_name) \
855 static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \
856 sdev_store_evt_##name);
857 #define REF_EVT(name) &dev_attr_evt_##name.attr
859 DECLARE_EVT(media_change, MEDIA_CHANGE)
860 DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED)
861 DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED)
862 DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED)
863 DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED)
864 DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED)
867 sdev_store_queue_depth(struct device *dev, struct device_attribute *attr,
868 const char *buf, size_t count)
871 struct scsi_device *sdev = to_scsi_device(dev);
872 struct scsi_host_template *sht = sdev->host->hostt;
874 if (!sht->change_queue_depth)
877 depth = simple_strtoul(buf, NULL, 0);
882 retval = sht->change_queue_depth(sdev, depth,
883 SCSI_QDEPTH_DEFAULT);
887 sdev->max_queue_depth = sdev->queue_depth;
891 sdev_show_function(queue_depth, "%d\n");
893 static DEVICE_ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth,
894 sdev_store_queue_depth);
897 sdev_show_queue_ramp_up_period(struct device *dev,
898 struct device_attribute *attr,
901 struct scsi_device *sdev;
902 sdev = to_scsi_device(dev);
903 return snprintf(buf, 20, "%u\n",
904 jiffies_to_msecs(sdev->queue_ramp_up_period));
908 sdev_store_queue_ramp_up_period(struct device *dev,
909 struct device_attribute *attr,
910 const char *buf, size_t count)
912 struct scsi_device *sdev = to_scsi_device(dev);
915 if (kstrtouint(buf, 10, &period))
918 sdev->queue_ramp_up_period = msecs_to_jiffies(period);
922 static DEVICE_ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR,
923 sdev_show_queue_ramp_up_period,
924 sdev_store_queue_ramp_up_period);
926 static umode_t scsi_sdev_attr_is_visible(struct kobject *kobj,
927 struct attribute *attr, int i)
929 struct device *dev = container_of(kobj, struct device, kobj);
930 struct scsi_device *sdev = to_scsi_device(dev);
933 if (attr == &dev_attr_queue_depth.attr &&
934 !sdev->host->hostt->change_queue_depth)
937 if (attr == &dev_attr_queue_ramp_up_period.attr &&
938 !sdev->host->hostt->change_queue_depth)
941 if (attr == &dev_attr_queue_type.attr &&
942 !sdev->host->hostt->change_queue_type)
948 /* Default template for device attributes. May NOT be modified */
949 static struct attribute *scsi_sdev_attrs[] = {
950 &dev_attr_device_blocked.attr,
952 &dev_attr_scsi_level.attr,
953 &dev_attr_device_busy.attr,
954 &dev_attr_vendor.attr,
955 &dev_attr_model.attr,
957 &dev_attr_rescan.attr,
958 &dev_attr_delete.attr,
959 &dev_attr_state.attr,
960 &dev_attr_timeout.attr,
961 &dev_attr_eh_timeout.attr,
962 &dev_attr_iocounterbits.attr,
963 &dev_attr_iorequest_cnt.attr,
964 &dev_attr_iodone_cnt.attr,
965 &dev_attr_ioerr_cnt.attr,
966 &dev_attr_modalias.attr,
967 &dev_attr_queue_depth.attr,
968 &dev_attr_queue_type.attr,
969 &dev_attr_queue_ramp_up_period.attr,
970 REF_EVT(media_change),
971 REF_EVT(inquiry_change_reported),
972 REF_EVT(capacity_change_reported),
973 REF_EVT(soft_threshold_reached),
974 REF_EVT(mode_parameter_change_reported),
975 REF_EVT(lun_change_reported),
979 static struct bin_attribute *scsi_sdev_bin_attrs[] = {
984 static struct attribute_group scsi_sdev_attr_group = {
985 .attrs = scsi_sdev_attrs,
986 .bin_attrs = scsi_sdev_bin_attrs,
987 .is_visible = scsi_sdev_attr_is_visible,
990 static const struct attribute_group *scsi_sdev_attr_groups[] = {
991 &scsi_sdev_attr_group,
995 static int scsi_target_add(struct scsi_target *starget)
999 if (starget->state != STARGET_CREATED)
1002 error = device_add(&starget->dev);
1004 dev_err(&starget->dev, "target device_add failed, error %d\n", error);
1007 transport_add_device(&starget->dev);
1008 starget->state = STARGET_RUNNING;
1010 pm_runtime_set_active(&starget->dev);
1011 pm_runtime_enable(&starget->dev);
1012 device_enable_async_suspend(&starget->dev);
1018 * scsi_sysfs_add_sdev - add scsi device to sysfs
1019 * @sdev: scsi_device to add
1022 * 0 on Success / non-zero on Failure
1024 int scsi_sysfs_add_sdev(struct scsi_device *sdev)
1027 struct request_queue *rq = sdev->request_queue;
1028 struct scsi_target *starget = sdev->sdev_target;
1030 error = scsi_device_set_state(sdev, SDEV_RUNNING);
1034 error = scsi_target_add(starget);
1038 transport_configure_device(&starget->dev);
1040 device_enable_async_suspend(&sdev->sdev_gendev);
1041 scsi_autopm_get_target(starget);
1042 pm_runtime_set_active(&sdev->sdev_gendev);
1043 pm_runtime_forbid(&sdev->sdev_gendev);
1044 pm_runtime_enable(&sdev->sdev_gendev);
1045 scsi_autopm_put_target(starget);
1047 scsi_autopm_get_device(sdev);
1049 error = device_add(&sdev->sdev_gendev);
1051 sdev_printk(KERN_INFO, sdev,
1052 "failed to add device: %d\n", error);
1055 device_enable_async_suspend(&sdev->sdev_dev);
1056 error = device_add(&sdev->sdev_dev);
1058 sdev_printk(KERN_INFO, sdev,
1059 "failed to add class device: %d\n", error);
1060 device_del(&sdev->sdev_gendev);
1063 transport_add_device(&sdev->sdev_gendev);
1064 sdev->is_visible = 1;
1066 error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL);
1069 /* we're treating error on bsg register as non-fatal,
1070 * so pretend nothing went wrong */
1071 sdev_printk(KERN_INFO, sdev,
1072 "Failed to register bsg queue, errno=%d\n", error);
1074 /* add additional host specific attributes */
1075 if (sdev->host->hostt->sdev_attrs) {
1076 for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) {
1077 error = device_create_file(&sdev->sdev_gendev,
1078 sdev->host->hostt->sdev_attrs[i]);
1084 scsi_autopm_put_device(sdev);
1088 void __scsi_remove_device(struct scsi_device *sdev)
1090 struct device *dev = &sdev->sdev_gendev;
1092 if (sdev->is_visible) {
1093 if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0)
1096 bsg_unregister_queue(sdev->request_queue);
1097 device_unregister(&sdev->sdev_dev);
1098 transport_remove_device(dev);
1101 put_device(&sdev->sdev_dev);
1104 * Stop accepting new requests and wait until all queuecommand() and
1105 * scsi_run_queue() invocations have finished before tearing down the
1108 scsi_device_set_state(sdev, SDEV_DEL);
1109 blk_cleanup_queue(sdev->request_queue);
1110 cancel_work_sync(&sdev->requeue_work);
1112 if (sdev->host->hostt->slave_destroy)
1113 sdev->host->hostt->slave_destroy(sdev);
1114 transport_destroy_device(dev);
1117 * Paired with the kref_get() in scsi_sysfs_initialize(). We have
1118 * remoed sysfs visibility from the device, so make the target
1119 * invisible if this was the last device underneath it.
1121 scsi_target_reap(scsi_target(sdev));
1127 * scsi_remove_device - unregister a device from the scsi bus
1128 * @sdev: scsi_device to unregister
1130 void scsi_remove_device(struct scsi_device *sdev)
1132 struct Scsi_Host *shost = sdev->host;
1134 mutex_lock(&shost->scan_mutex);
1135 __scsi_remove_device(sdev);
1136 mutex_unlock(&shost->scan_mutex);
1138 EXPORT_SYMBOL(scsi_remove_device);
1140 static void __scsi_remove_target(struct scsi_target *starget)
1142 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1143 unsigned long flags;
1144 struct scsi_device *sdev;
1146 spin_lock_irqsave(shost->host_lock, flags);
1148 list_for_each_entry(sdev, &shost->__devices, siblings) {
1149 if (sdev->channel != starget->channel ||
1150 sdev->id != starget->id ||
1151 scsi_device_get(sdev))
1153 spin_unlock_irqrestore(shost->host_lock, flags);
1154 scsi_remove_device(sdev);
1155 scsi_device_put(sdev);
1156 spin_lock_irqsave(shost->host_lock, flags);
1159 spin_unlock_irqrestore(shost->host_lock, flags);
1163 * scsi_remove_target - try to remove a target and all its devices
1164 * @dev: generic starget or parent of generic stargets to be removed
1166 * Note: This is slightly racy. It is possible that if the user
1167 * requests the addition of another device then the target won't be
1170 void scsi_remove_target(struct device *dev)
1172 struct Scsi_Host *shost = dev_to_shost(dev->parent);
1173 struct scsi_target *starget, *last = NULL;
1174 unsigned long flags;
1176 /* remove targets being careful to lookup next entry before
1179 spin_lock_irqsave(shost->host_lock, flags);
1180 list_for_each_entry(starget, &shost->__targets, siblings) {
1181 if (starget->state == STARGET_DEL)
1183 if (starget->dev.parent == dev || &starget->dev == dev) {
1184 /* assuming new targets arrive at the end */
1185 kref_get(&starget->reap_ref);
1186 spin_unlock_irqrestore(shost->host_lock, flags);
1188 scsi_target_reap(last);
1190 __scsi_remove_target(starget);
1191 spin_lock_irqsave(shost->host_lock, flags);
1194 spin_unlock_irqrestore(shost->host_lock, flags);
1197 scsi_target_reap(last);
1199 EXPORT_SYMBOL(scsi_remove_target);
1201 int scsi_register_driver(struct device_driver *drv)
1203 drv->bus = &scsi_bus_type;
1205 return driver_register(drv);
1207 EXPORT_SYMBOL(scsi_register_driver);
1209 int scsi_register_interface(struct class_interface *intf)
1211 intf->class = &sdev_class;
1213 return class_interface_register(intf);
1215 EXPORT_SYMBOL(scsi_register_interface);
1218 * scsi_sysfs_add_host - add scsi host to subsystem
1219 * @shost: scsi host struct to add to subsystem
1221 int scsi_sysfs_add_host(struct Scsi_Host *shost)
1225 /* add host specific attributes */
1226 if (shost->hostt->shost_attrs) {
1227 for (i = 0; shost->hostt->shost_attrs[i]; i++) {
1228 error = device_create_file(&shost->shost_dev,
1229 shost->hostt->shost_attrs[i]);
1235 transport_register_device(&shost->shost_gendev);
1236 transport_configure_device(&shost->shost_gendev);
1240 static struct device_type scsi_dev_type = {
1241 .name = "scsi_device",
1242 .release = scsi_device_dev_release,
1243 .groups = scsi_sdev_attr_groups,
1246 void scsi_sysfs_device_initialize(struct scsi_device *sdev)
1248 unsigned long flags;
1249 struct Scsi_Host *shost = sdev->host;
1250 struct scsi_target *starget = sdev->sdev_target;
1252 device_initialize(&sdev->sdev_gendev);
1253 sdev->sdev_gendev.bus = &scsi_bus_type;
1254 sdev->sdev_gendev.type = &scsi_dev_type;
1255 dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%llu",
1256 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1258 device_initialize(&sdev->sdev_dev);
1259 sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev);
1260 sdev->sdev_dev.class = &sdev_class;
1261 dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%llu",
1262 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1264 * Get a default scsi_level from the target (derived from sibling
1265 * devices). This is the best we can do for guessing how to set
1266 * sdev->lun_in_cdb for the initial INQUIRY command. For LUN 0 the
1267 * setting doesn't matter, because all the bits are zero anyway.
1268 * But it does matter for higher LUNs.
1270 sdev->scsi_level = starget->scsi_level;
1271 if (sdev->scsi_level <= SCSI_2 &&
1272 sdev->scsi_level != SCSI_UNKNOWN &&
1273 !shost->no_scsi2_lun_in_cdb)
1274 sdev->lun_in_cdb = 1;
1276 transport_setup_device(&sdev->sdev_gendev);
1277 spin_lock_irqsave(shost->host_lock, flags);
1278 list_add_tail(&sdev->same_target_siblings, &starget->devices);
1279 list_add_tail(&sdev->siblings, &shost->__devices);
1280 spin_unlock_irqrestore(shost->host_lock, flags);
1282 * device can now only be removed via __scsi_remove_device() so hold
1283 * the target. Target will be held in CREATED state until something
1284 * beneath it becomes visible (in which case it moves to RUNNING)
1286 kref_get(&starget->reap_ref);
1289 int scsi_is_sdev_device(const struct device *dev)
1291 return dev->type == &scsi_dev_type;
1293 EXPORT_SYMBOL(scsi_is_sdev_device);
1295 /* A blank transport template that is used in drivers that don't
1296 * yet implement Transport Attributes */
1297 struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, };