1 // SPDX-License-Identifier: GPL-2.0-only
5 * SCSI sysfs interface routines.
7 * Created to pull SCSI mid layer sysfs routines into one file.
10 #include <linux/module.h>
11 #include <linux/slab.h>
12 #include <linux/init.h>
13 #include <linux/blkdev.h>
14 #include <linux/device.h>
15 #include <linux/pm_runtime.h>
17 #include <scsi/scsi.h>
18 #include <scsi/scsi_device.h>
19 #include <scsi/scsi_host.h>
20 #include <scsi/scsi_tcq.h>
21 #include <scsi/scsi_dh.h>
22 #include <scsi/scsi_transport.h>
23 #include <scsi/scsi_driver.h>
24 #include <scsi/scsi_devinfo.h>
26 #include "scsi_priv.h"
27 #include "scsi_logging.h"
29 static struct device_type scsi_dev_type
;
32 enum scsi_device_state value
;
35 { SDEV_CREATED
, "created" },
36 { SDEV_RUNNING
, "running" },
37 { SDEV_CANCEL
, "cancel" },
38 { SDEV_DEL
, "deleted" },
39 { SDEV_QUIESCE
, "quiesce" },
40 { SDEV_OFFLINE
, "offline" },
41 { SDEV_TRANSPORT_OFFLINE
, "transport-offline" },
42 { SDEV_BLOCK
, "blocked" },
43 { SDEV_CREATED_BLOCK
, "created-blocked" },
46 const char *scsi_device_state_name(enum scsi_device_state state
)
51 for (i
= 0; i
< ARRAY_SIZE(sdev_states
); i
++) {
52 if (sdev_states
[i
].value
== state
) {
53 name
= sdev_states
[i
].name
;
61 enum scsi_host_state value
;
64 { SHOST_CREATED
, "created" },
65 { SHOST_RUNNING
, "running" },
66 { SHOST_CANCEL
, "cancel" },
67 { SHOST_DEL
, "deleted" },
68 { SHOST_RECOVERY
, "recovery" },
69 { SHOST_CANCEL_RECOVERY
, "cancel/recovery" },
70 { SHOST_DEL_RECOVERY
, "deleted/recovery", },
72 const char *scsi_host_state_name(enum scsi_host_state state
)
77 for (i
= 0; i
< ARRAY_SIZE(shost_states
); i
++) {
78 if (shost_states
[i
].value
== state
) {
79 name
= shost_states
[i
].name
;
90 } sdev_access_states
[] = {
91 { SCSI_ACCESS_STATE_OPTIMAL
, "active/optimized" },
92 { SCSI_ACCESS_STATE_ACTIVE
, "active/non-optimized" },
93 { SCSI_ACCESS_STATE_STANDBY
, "standby" },
94 { SCSI_ACCESS_STATE_UNAVAILABLE
, "unavailable" },
95 { SCSI_ACCESS_STATE_LBA
, "lba-dependent" },
96 { SCSI_ACCESS_STATE_OFFLINE
, "offline" },
97 { SCSI_ACCESS_STATE_TRANSITIONING
, "transitioning" },
100 static const char *scsi_access_state_name(unsigned char state
)
105 for (i
= 0; i
< ARRAY_SIZE(sdev_access_states
); i
++) {
106 if (sdev_access_states
[i
].value
== state
) {
107 name
= sdev_access_states
[i
].name
;
115 static int check_set(unsigned long long *val
, char *src
)
119 if (strcmp(src
, "-") == 0) {
120 *val
= SCAN_WILD_CARD
;
123 * Doesn't check for int overflow
125 *val
= simple_strtoull(src
, &last
, 0);
132 static int scsi_scan(struct Scsi_Host
*shost
, const char *str
)
134 char s1
[15], s2
[15], s3
[17], junk
;
135 unsigned long long channel
, id
, lun
;
138 res
= sscanf(str
, "%10s %10s %16s %c", s1
, s2
, s3
, &junk
);
141 if (check_set(&channel
, s1
))
143 if (check_set(&id
, s2
))
145 if (check_set(&lun
, s3
))
147 if (shost
->transportt
->user_scan
)
148 res
= shost
->transportt
->user_scan(shost
, channel
, id
, lun
);
150 res
= scsi_scan_host_selected(shost
, channel
, id
, lun
,
156 * shost_show_function: macro to create an attr function that can be used to
157 * show a non-bit field.
159 #define shost_show_function(name, field, format_string) \
161 show_##name (struct device *dev, struct device_attribute *attr, \
164 struct Scsi_Host *shost = class_to_shost(dev); \
165 return snprintf (buf, 20, format_string, shost->field); \
169 * shost_rd_attr: macro to create a function and attribute variable for a
172 #define shost_rd_attr2(name, field, format_string) \
173 shost_show_function(name, field, format_string) \
174 static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
176 #define shost_rd_attr(field, format_string) \
177 shost_rd_attr2(field, field, format_string)
180 * Create the actual show/store functions and data structures.
184 store_scan(struct device
*dev
, struct device_attribute
*attr
,
185 const char *buf
, size_t count
)
187 struct Scsi_Host
*shost
= class_to_shost(dev
);
190 res
= scsi_scan(shost
, buf
);
195 static DEVICE_ATTR(scan
, S_IWUSR
, NULL
, store_scan
);
198 store_shost_state(struct device
*dev
, struct device_attribute
*attr
,
199 const char *buf
, size_t count
)
202 struct Scsi_Host
*shost
= class_to_shost(dev
);
203 enum scsi_host_state state
= 0;
205 for (i
= 0; i
< ARRAY_SIZE(shost_states
); i
++) {
206 const int len
= strlen(shost_states
[i
].name
);
207 if (strncmp(shost_states
[i
].name
, buf
, len
) == 0 &&
209 state
= shost_states
[i
].value
;
216 if (scsi_host_set_state(shost
, state
))
222 show_shost_state(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
224 struct Scsi_Host
*shost
= class_to_shost(dev
);
225 const char *name
= scsi_host_state_name(shost
->shost_state
);
230 return snprintf(buf
, 20, "%s\n", name
);
233 /* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */
234 static struct device_attribute dev_attr_hstate
=
235 __ATTR(state
, S_IRUGO
| S_IWUSR
, show_shost_state
, store_shost_state
);
238 show_shost_mode(unsigned int mode
, char *buf
)
242 if (mode
& MODE_INITIATOR
)
243 len
= sprintf(buf
, "%s", "Initiator");
245 if (mode
& MODE_TARGET
)
246 len
+= sprintf(buf
+ len
, "%s%s", len
? ", " : "", "Target");
248 len
+= sprintf(buf
+ len
, "\n");
254 show_shost_supported_mode(struct device
*dev
, struct device_attribute
*attr
,
257 struct Scsi_Host
*shost
= class_to_shost(dev
);
258 unsigned int supported_mode
= shost
->hostt
->supported_mode
;
260 if (supported_mode
== MODE_UNKNOWN
)
261 /* by default this should be initiator */
262 supported_mode
= MODE_INITIATOR
;
264 return show_shost_mode(supported_mode
, buf
);
267 static DEVICE_ATTR(supported_mode
, S_IRUGO
| S_IWUSR
, show_shost_supported_mode
, NULL
);
270 show_shost_active_mode(struct device
*dev
,
271 struct device_attribute
*attr
, char *buf
)
273 struct Scsi_Host
*shost
= class_to_shost(dev
);
275 if (shost
->active_mode
== MODE_UNKNOWN
)
276 return snprintf(buf
, 20, "unknown\n");
278 return show_shost_mode(shost
->active_mode
, buf
);
281 static DEVICE_ATTR(active_mode
, S_IRUGO
| S_IWUSR
, show_shost_active_mode
, NULL
);
283 static int check_reset_type(const char *str
)
285 if (sysfs_streq(str
, "adapter"))
286 return SCSI_ADAPTER_RESET
;
287 else if (sysfs_streq(str
, "firmware"))
288 return SCSI_FIRMWARE_RESET
;
294 store_host_reset(struct device
*dev
, struct device_attribute
*attr
,
295 const char *buf
, size_t count
)
297 struct Scsi_Host
*shost
= class_to_shost(dev
);
298 struct scsi_host_template
*sht
= shost
->hostt
;
302 type
= check_reset_type(buf
);
304 goto exit_store_host_reset
;
307 ret
= sht
->host_reset(shost
, type
);
311 exit_store_host_reset
:
317 static DEVICE_ATTR(host_reset
, S_IWUSR
, NULL
, store_host_reset
);
320 show_shost_eh_deadline(struct device
*dev
,
321 struct device_attribute
*attr
, char *buf
)
323 struct Scsi_Host
*shost
= class_to_shost(dev
);
325 if (shost
->eh_deadline
== -1)
326 return snprintf(buf
, strlen("off") + 2, "off\n");
327 return sprintf(buf
, "%u\n", shost
->eh_deadline
/ HZ
);
331 store_shost_eh_deadline(struct device
*dev
, struct device_attribute
*attr
,
332 const char *buf
, size_t count
)
334 struct Scsi_Host
*shost
= class_to_shost(dev
);
336 unsigned long deadline
, flags
;
338 if (shost
->transportt
&&
339 (shost
->transportt
->eh_strategy_handler
||
340 !shost
->hostt
->eh_host_reset_handler
))
343 if (!strncmp(buf
, "off", strlen("off")))
346 ret
= kstrtoul(buf
, 10, &deadline
);
349 if (deadline
* HZ
> UINT_MAX
)
353 spin_lock_irqsave(shost
->host_lock
, flags
);
354 if (scsi_host_in_recovery(shost
))
358 shost
->eh_deadline
= -1;
360 shost
->eh_deadline
= deadline
* HZ
;
364 spin_unlock_irqrestore(shost
->host_lock
, flags
);
369 static DEVICE_ATTR(eh_deadline
, S_IRUGO
| S_IWUSR
, show_shost_eh_deadline
, store_shost_eh_deadline
);
371 shost_rd_attr(unique_id
, "%u\n");
372 shost_rd_attr(cmd_per_lun
, "%hd\n");
373 shost_rd_attr(can_queue
, "%hd\n");
374 shost_rd_attr(sg_tablesize
, "%hu\n");
375 shost_rd_attr(sg_prot_tablesize
, "%hu\n");
376 shost_rd_attr(unchecked_isa_dma
, "%d\n");
377 shost_rd_attr(prot_capabilities
, "%u\n");
378 shost_rd_attr(prot_guard_type
, "%hd\n");
379 shost_rd_attr2(proc_name
, hostt
->proc_name
, "%s\n");
382 show_host_busy(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
384 struct Scsi_Host
*shost
= class_to_shost(dev
);
385 return snprintf(buf
, 20, "%d\n", scsi_host_busy(shost
));
387 static DEVICE_ATTR(host_busy
, S_IRUGO
, show_host_busy
, NULL
);
390 show_use_blk_mq(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
392 return sprintf(buf
, "1\n");
394 static DEVICE_ATTR(use_blk_mq
, S_IRUGO
, show_use_blk_mq
, NULL
);
396 static struct attribute
*scsi_sysfs_shost_attrs
[] = {
397 &dev_attr_use_blk_mq
.attr
,
398 &dev_attr_unique_id
.attr
,
399 &dev_attr_host_busy
.attr
,
400 &dev_attr_cmd_per_lun
.attr
,
401 &dev_attr_can_queue
.attr
,
402 &dev_attr_sg_tablesize
.attr
,
403 &dev_attr_sg_prot_tablesize
.attr
,
404 &dev_attr_unchecked_isa_dma
.attr
,
405 &dev_attr_proc_name
.attr
,
407 &dev_attr_hstate
.attr
,
408 &dev_attr_supported_mode
.attr
,
409 &dev_attr_active_mode
.attr
,
410 &dev_attr_prot_capabilities
.attr
,
411 &dev_attr_prot_guard_type
.attr
,
412 &dev_attr_host_reset
.attr
,
413 &dev_attr_eh_deadline
.attr
,
417 static struct attribute_group scsi_shost_attr_group
= {
418 .attrs
= scsi_sysfs_shost_attrs
,
421 const struct attribute_group
*scsi_sysfs_shost_attr_groups
[] = {
422 &scsi_shost_attr_group
,
426 static void scsi_device_cls_release(struct device
*class_dev
)
428 struct scsi_device
*sdev
;
430 sdev
= class_to_sdev(class_dev
);
431 put_device(&sdev
->sdev_gendev
);
434 static void scsi_device_dev_release_usercontext(struct work_struct
*work
)
436 struct scsi_device
*sdev
;
437 struct device
*parent
;
438 struct list_head
*this, *tmp
;
439 struct scsi_vpd
*vpd_pg80
= NULL
, *vpd_pg83
= NULL
;
442 sdev
= container_of(work
, struct scsi_device
, ew
.work
);
444 scsi_dh_release_device(sdev
);
446 parent
= sdev
->sdev_gendev
.parent
;
448 spin_lock_irqsave(sdev
->host
->host_lock
, flags
);
449 list_del(&sdev
->siblings
);
450 list_del(&sdev
->same_target_siblings
);
451 list_del(&sdev
->starved_entry
);
452 spin_unlock_irqrestore(sdev
->host
->host_lock
, flags
);
454 cancel_work_sync(&sdev
->event_work
);
456 list_for_each_safe(this, tmp
, &sdev
->event_list
) {
457 struct scsi_event
*evt
;
459 evt
= list_entry(this, struct scsi_event
, node
);
460 list_del(&evt
->node
);
464 blk_put_queue(sdev
->request_queue
);
465 /* NULL queue means the device can't be used */
466 sdev
->request_queue
= NULL
;
468 mutex_lock(&sdev
->inquiry_mutex
);
469 rcu_swap_protected(sdev
->vpd_pg80
, vpd_pg80
,
470 lockdep_is_held(&sdev
->inquiry_mutex
));
471 rcu_swap_protected(sdev
->vpd_pg83
, vpd_pg83
,
472 lockdep_is_held(&sdev
->inquiry_mutex
));
473 mutex_unlock(&sdev
->inquiry_mutex
);
476 kfree_rcu(vpd_pg83
, rcu
);
478 kfree_rcu(vpd_pg80
, rcu
);
479 kfree(sdev
->inquiry
);
486 static void scsi_device_dev_release(struct device
*dev
)
488 struct scsi_device
*sdp
= to_scsi_device(dev
);
489 execute_in_process_context(scsi_device_dev_release_usercontext
,
493 static struct class sdev_class
= {
494 .name
= "scsi_device",
495 .dev_release
= scsi_device_cls_release
,
498 /* all probing is done in the individual ->probe routines */
499 static int scsi_bus_match(struct device
*dev
, struct device_driver
*gendrv
)
501 struct scsi_device
*sdp
;
503 if (dev
->type
!= &scsi_dev_type
)
506 sdp
= to_scsi_device(dev
);
507 if (sdp
->no_uld_attach
)
509 return (sdp
->inq_periph_qual
== SCSI_INQ_PQ_CON
)? 1: 0;
512 static int scsi_bus_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
514 struct scsi_device
*sdev
;
516 if (dev
->type
!= &scsi_dev_type
)
519 sdev
= to_scsi_device(dev
);
521 add_uevent_var(env
, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT
, sdev
->type
);
525 struct bus_type scsi_bus_type
= {
527 .match
= scsi_bus_match
,
528 .uevent
= scsi_bus_uevent
,
530 .pm
= &scsi_bus_pm_ops
,
533 EXPORT_SYMBOL_GPL(scsi_bus_type
);
535 int scsi_sysfs_register(void)
539 error
= bus_register(&scsi_bus_type
);
541 error
= class_register(&sdev_class
);
543 bus_unregister(&scsi_bus_type
);
549 void scsi_sysfs_unregister(void)
551 class_unregister(&sdev_class
);
552 bus_unregister(&scsi_bus_type
);
556 * sdev_show_function: macro to create an attr function that can be used to
557 * show a non-bit field.
559 #define sdev_show_function(field, format_string) \
561 sdev_show_##field (struct device *dev, struct device_attribute *attr, \
564 struct scsi_device *sdev; \
565 sdev = to_scsi_device(dev); \
566 return snprintf (buf, 20, format_string, sdev->field); \
570 * sdev_rd_attr: macro to create a function and attribute variable for a
573 #define sdev_rd_attr(field, format_string) \
574 sdev_show_function(field, format_string) \
575 static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL);
579 * sdev_rw_attr: create a function and attribute variable for a
582 #define sdev_rw_attr(field, format_string) \
583 sdev_show_function(field, format_string) \
586 sdev_store_##field (struct device *dev, struct device_attribute *attr, \
587 const char *buf, size_t count) \
589 struct scsi_device *sdev; \
590 sdev = to_scsi_device(dev); \
591 sscanf (buf, format_string, &sdev->field); \
594 static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
596 /* Currently we don't export bit fields, but we might in future,
597 * so leave this code in */
600 * sdev_rd_attr: create a function and attribute variable for a
601 * read/write bit field.
603 #define sdev_rw_attr_bit(field) \
604 sdev_show_function(field, "%d\n") \
607 sdev_store_##field (struct device *dev, struct device_attribute *attr, \
608 const char *buf, size_t count) \
611 struct scsi_device *sdev; \
612 ret = scsi_sdev_check_buf_bit(buf); \
614 sdev = to_scsi_device(dev); \
620 static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
623 * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1",
624 * else return -EINVAL.
626 static int scsi_sdev_check_buf_bit(const char *buf
)
628 if ((buf
[1] == '\0') || ((buf
[1] == '\n') && (buf
[2] == '\0'))) {
631 else if (buf
[0] == '0')
640 * Create the actual show/store functions and data structures.
642 sdev_rd_attr (type
, "%d\n");
643 sdev_rd_attr (scsi_level
, "%d\n");
644 sdev_rd_attr (vendor
, "%.8s\n");
645 sdev_rd_attr (model
, "%.16s\n");
646 sdev_rd_attr (rev
, "%.4s\n");
649 sdev_show_device_busy(struct device
*dev
, struct device_attribute
*attr
,
652 struct scsi_device
*sdev
= to_scsi_device(dev
);
653 return snprintf(buf
, 20, "%d\n", atomic_read(&sdev
->device_busy
));
655 static DEVICE_ATTR(device_busy
, S_IRUGO
, sdev_show_device_busy
, NULL
);
658 sdev_show_device_blocked(struct device
*dev
, struct device_attribute
*attr
,
661 struct scsi_device
*sdev
= to_scsi_device(dev
);
662 return snprintf(buf
, 20, "%d\n", atomic_read(&sdev
->device_blocked
));
664 static DEVICE_ATTR(device_blocked
, S_IRUGO
, sdev_show_device_blocked
, NULL
);
667 * TODO: can we make these symlinks to the block layer ones?
670 sdev_show_timeout (struct device
*dev
, struct device_attribute
*attr
, char *buf
)
672 struct scsi_device
*sdev
;
673 sdev
= to_scsi_device(dev
);
674 return snprintf(buf
, 20, "%d\n", sdev
->request_queue
->rq_timeout
/ HZ
);
678 sdev_store_timeout (struct device
*dev
, struct device_attribute
*attr
,
679 const char *buf
, size_t count
)
681 struct scsi_device
*sdev
;
683 sdev
= to_scsi_device(dev
);
684 sscanf (buf
, "%d\n", &timeout
);
685 blk_queue_rq_timeout(sdev
->request_queue
, timeout
* HZ
);
688 static DEVICE_ATTR(timeout
, S_IRUGO
| S_IWUSR
, sdev_show_timeout
, sdev_store_timeout
);
691 sdev_show_eh_timeout(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
693 struct scsi_device
*sdev
;
694 sdev
= to_scsi_device(dev
);
695 return snprintf(buf
, 20, "%u\n", sdev
->eh_timeout
/ HZ
);
699 sdev_store_eh_timeout(struct device
*dev
, struct device_attribute
*attr
,
700 const char *buf
, size_t count
)
702 struct scsi_device
*sdev
;
703 unsigned int eh_timeout
;
706 if (!capable(CAP_SYS_ADMIN
))
709 sdev
= to_scsi_device(dev
);
710 err
= kstrtouint(buf
, 10, &eh_timeout
);
713 sdev
->eh_timeout
= eh_timeout
* HZ
;
717 static DEVICE_ATTR(eh_timeout
, S_IRUGO
| S_IWUSR
, sdev_show_eh_timeout
, sdev_store_eh_timeout
);
720 store_rescan_field (struct device
*dev
, struct device_attribute
*attr
,
721 const char *buf
, size_t count
)
723 scsi_rescan_device(dev
);
726 static DEVICE_ATTR(rescan
, S_IWUSR
, NULL
, store_rescan_field
);
729 sdev_store_delete(struct device
*dev
, struct device_attribute
*attr
,
730 const char *buf
, size_t count
)
732 struct kernfs_node
*kn
;
734 kn
= sysfs_break_active_protection(&dev
->kobj
, &attr
->attr
);
737 * Concurrent writes into the "delete" sysfs attribute may trigger
738 * concurrent calls to device_remove_file() and scsi_remove_device().
739 * device_remove_file() handles concurrent removal calls by
740 * serializing these and by ignoring the second and later removal
741 * attempts. Concurrent calls of scsi_remove_device() are
742 * serialized. The second and later calls of scsi_remove_device() are
743 * ignored because the first call of that function changes the device
744 * state into SDEV_DEL.
746 device_remove_file(dev
, attr
);
747 scsi_remove_device(to_scsi_device(dev
));
749 sysfs_unbreak_active_protection(kn
);
752 static DEVICE_ATTR(delete, S_IWUSR
, NULL
, sdev_store_delete
);
755 store_state_field(struct device
*dev
, struct device_attribute
*attr
,
756 const char *buf
, size_t count
)
759 struct scsi_device
*sdev
= to_scsi_device(dev
);
760 enum scsi_device_state state
= 0;
762 for (i
= 0; i
< ARRAY_SIZE(sdev_states
); i
++) {
763 const int len
= strlen(sdev_states
[i
].name
);
764 if (strncmp(sdev_states
[i
].name
, buf
, len
) == 0 &&
766 state
= sdev_states
[i
].value
;
773 mutex_lock(&sdev
->state_mutex
);
774 ret
= scsi_device_set_state(sdev
, state
);
776 * If the device state changes to SDEV_RUNNING, we need to run
777 * the queue to avoid I/O hang.
779 if (ret
== 0 && state
== SDEV_RUNNING
)
780 blk_mq_run_hw_queues(sdev
->request_queue
, true);
781 mutex_unlock(&sdev
->state_mutex
);
783 return ret
== 0 ? count
: -EINVAL
;
787 show_state_field(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
789 struct scsi_device
*sdev
= to_scsi_device(dev
);
790 const char *name
= scsi_device_state_name(sdev
->sdev_state
);
795 return snprintf(buf
, 20, "%s\n", name
);
798 static DEVICE_ATTR(state
, S_IRUGO
| S_IWUSR
, show_state_field
, store_state_field
);
801 show_queue_type_field(struct device
*dev
, struct device_attribute
*attr
,
804 struct scsi_device
*sdev
= to_scsi_device(dev
);
805 const char *name
= "none";
807 if (sdev
->simple_tags
)
810 return snprintf(buf
, 20, "%s\n", name
);
814 store_queue_type_field(struct device
*dev
, struct device_attribute
*attr
,
815 const char *buf
, size_t count
)
817 struct scsi_device
*sdev
= to_scsi_device(dev
);
819 if (!sdev
->tagged_supported
)
822 sdev_printk(KERN_INFO
, sdev
,
823 "ignoring write to deprecated queue_type attribute");
827 static DEVICE_ATTR(queue_type
, S_IRUGO
| S_IWUSR
, show_queue_type_field
,
828 store_queue_type_field
);
830 #define sdev_vpd_pg_attr(_page) \
832 show_vpd_##_page(struct file *filp, struct kobject *kobj, \
833 struct bin_attribute *bin_attr, \
834 char *buf, loff_t off, size_t count) \
836 struct device *dev = container_of(kobj, struct device, kobj); \
837 struct scsi_device *sdev = to_scsi_device(dev); \
838 struct scsi_vpd *vpd_page; \
842 vpd_page = rcu_dereference(sdev->vpd_##_page); \
844 ret = memory_read_from_buffer(buf, count, &off, \
845 vpd_page->data, vpd_page->len); \
849 static struct bin_attribute dev_attr_vpd_##_page = { \
850 .attr = {.name = __stringify(vpd_##_page), .mode = S_IRUGO }, \
852 .read = show_vpd_##_page, \
855 sdev_vpd_pg_attr(pg83
);
856 sdev_vpd_pg_attr(pg80
);
858 static ssize_t
show_inquiry(struct file
*filep
, struct kobject
*kobj
,
859 struct bin_attribute
*bin_attr
,
860 char *buf
, loff_t off
, size_t count
)
862 struct device
*dev
= container_of(kobj
, struct device
, kobj
);
863 struct scsi_device
*sdev
= to_scsi_device(dev
);
868 return memory_read_from_buffer(buf
, count
, &off
, sdev
->inquiry
,
872 static struct bin_attribute dev_attr_inquiry
= {
878 .read
= show_inquiry
,
882 show_iostat_counterbits(struct device
*dev
, struct device_attribute
*attr
,
885 return snprintf(buf
, 20, "%d\n", (int)sizeof(atomic_t
) * 8);
888 static DEVICE_ATTR(iocounterbits
, S_IRUGO
, show_iostat_counterbits
, NULL
);
890 #define show_sdev_iostat(field) \
892 show_iostat_##field(struct device *dev, struct device_attribute *attr, \
895 struct scsi_device *sdev = to_scsi_device(dev); \
896 unsigned long long count = atomic_read(&sdev->field); \
897 return snprintf(buf, 20, "0x%llx\n", count); \
899 static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL)
901 show_sdev_iostat(iorequest_cnt
);
902 show_sdev_iostat(iodone_cnt
);
903 show_sdev_iostat(ioerr_cnt
);
906 sdev_show_modalias(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
908 struct scsi_device
*sdev
;
909 sdev
= to_scsi_device(dev
);
910 return snprintf (buf
, 20, SCSI_DEVICE_MODALIAS_FMT
"\n", sdev
->type
);
912 static DEVICE_ATTR(modalias
, S_IRUGO
, sdev_show_modalias
, NULL
);
914 #define DECLARE_EVT_SHOW(name, Cap_name) \
916 sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \
919 struct scsi_device *sdev = to_scsi_device(dev); \
920 int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\
921 return snprintf(buf, 20, "%d\n", val); \
924 #define DECLARE_EVT_STORE(name, Cap_name) \
926 sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\
927 const char *buf, size_t count) \
929 struct scsi_device *sdev = to_scsi_device(dev); \
930 int val = simple_strtoul(buf, NULL, 0); \
932 clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
934 set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
940 #define DECLARE_EVT(name, Cap_name) \
941 DECLARE_EVT_SHOW(name, Cap_name) \
942 DECLARE_EVT_STORE(name, Cap_name) \
943 static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \
944 sdev_store_evt_##name);
945 #define REF_EVT(name) &dev_attr_evt_##name.attr
947 DECLARE_EVT(media_change
, MEDIA_CHANGE
)
948 DECLARE_EVT(inquiry_change_reported
, INQUIRY_CHANGE_REPORTED
)
949 DECLARE_EVT(capacity_change_reported
, CAPACITY_CHANGE_REPORTED
)
950 DECLARE_EVT(soft_threshold_reached
, SOFT_THRESHOLD_REACHED_REPORTED
)
951 DECLARE_EVT(mode_parameter_change_reported
, MODE_PARAMETER_CHANGE_REPORTED
)
952 DECLARE_EVT(lun_change_reported
, LUN_CHANGE_REPORTED
)
955 sdev_store_queue_depth(struct device
*dev
, struct device_attribute
*attr
,
956 const char *buf
, size_t count
)
959 struct scsi_device
*sdev
= to_scsi_device(dev
);
960 struct scsi_host_template
*sht
= sdev
->host
->hostt
;
962 if (!sht
->change_queue_depth
)
965 depth
= simple_strtoul(buf
, NULL
, 0);
967 if (depth
< 1 || depth
> sdev
->host
->can_queue
)
970 retval
= sht
->change_queue_depth(sdev
, depth
);
974 sdev
->max_queue_depth
= sdev
->queue_depth
;
978 sdev_show_function(queue_depth
, "%d\n");
980 static DEVICE_ATTR(queue_depth
, S_IRUGO
| S_IWUSR
, sdev_show_queue_depth
,
981 sdev_store_queue_depth
);
984 sdev_show_wwid(struct device
*dev
, struct device_attribute
*attr
,
987 struct scsi_device
*sdev
= to_scsi_device(dev
);
990 count
= scsi_vpd_lun_id(sdev
, buf
, PAGE_SIZE
);
997 static DEVICE_ATTR(wwid
, S_IRUGO
, sdev_show_wwid
, NULL
);
999 #define BLIST_FLAG_NAME(name) \
1000 [const_ilog2((__force __u64)BLIST_##name)] = #name
1001 static const char *const sdev_bflags_name
[] = {
1002 #include "scsi_devinfo_tbl.c"
1004 #undef BLIST_FLAG_NAME
1007 sdev_show_blacklist(struct device
*dev
, struct device_attribute
*attr
,
1010 struct scsi_device
*sdev
= to_scsi_device(dev
);
1014 for (i
= 0; i
< sizeof(sdev
->sdev_bflags
) * BITS_PER_BYTE
; i
++) {
1015 const char *name
= NULL
;
1017 if (!(sdev
->sdev_bflags
& (__force blist_flags_t
)BIT(i
)))
1019 if (i
< ARRAY_SIZE(sdev_bflags_name
) && sdev_bflags_name
[i
])
1020 name
= sdev_bflags_name
[i
];
1023 len
+= snprintf(buf
+ len
, PAGE_SIZE
- len
,
1024 "%s%s", len
? " " : "", name
);
1026 len
+= snprintf(buf
+ len
, PAGE_SIZE
- len
,
1027 "%sINVALID_BIT(%d)", len
? " " : "", i
);
1030 len
+= snprintf(buf
+ len
, PAGE_SIZE
- len
, "\n");
1033 static DEVICE_ATTR(blacklist
, S_IRUGO
, sdev_show_blacklist
, NULL
);
1035 #ifdef CONFIG_SCSI_DH
1037 sdev_show_dh_state(struct device
*dev
, struct device_attribute
*attr
,
1040 struct scsi_device
*sdev
= to_scsi_device(dev
);
1043 return snprintf(buf
, 20, "detached\n");
1045 return snprintf(buf
, 20, "%s\n", sdev
->handler
->name
);
1049 sdev_store_dh_state(struct device
*dev
, struct device_attribute
*attr
,
1050 const char *buf
, size_t count
)
1052 struct scsi_device
*sdev
= to_scsi_device(dev
);
1055 if (sdev
->sdev_state
== SDEV_CANCEL
||
1056 sdev
->sdev_state
== SDEV_DEL
)
1059 if (!sdev
->handler
) {
1061 * Attach to a device handler
1063 err
= scsi_dh_attach(sdev
->request_queue
, buf
);
1064 } else if (!strncmp(buf
, "activate", 8)) {
1066 * Activate a device handler
1068 if (sdev
->handler
->activate
)
1069 err
= sdev
->handler
->activate(sdev
, NULL
, NULL
);
1072 } else if (!strncmp(buf
, "detach", 6)) {
1074 * Detach from a device handler
1076 sdev_printk(KERN_WARNING
, sdev
,
1077 "can't detach handler %s.\n",
1078 sdev
->handler
->name
);
1082 return err
< 0 ? err
: count
;
1085 static DEVICE_ATTR(dh_state
, S_IRUGO
| S_IWUSR
, sdev_show_dh_state
,
1086 sdev_store_dh_state
);
1089 sdev_show_access_state(struct device
*dev
,
1090 struct device_attribute
*attr
,
1093 struct scsi_device
*sdev
= to_scsi_device(dev
);
1094 unsigned char access_state
;
1095 const char *access_state_name
;
1100 access_state
= (sdev
->access_state
& SCSI_ACCESS_STATE_MASK
);
1101 access_state_name
= scsi_access_state_name(access_state
);
1103 return sprintf(buf
, "%s\n",
1104 access_state_name
? access_state_name
: "unknown");
1106 static DEVICE_ATTR(access_state
, S_IRUGO
, sdev_show_access_state
, NULL
);
1109 sdev_show_preferred_path(struct device
*dev
,
1110 struct device_attribute
*attr
,
1113 struct scsi_device
*sdev
= to_scsi_device(dev
);
1118 if (sdev
->access_state
& SCSI_ACCESS_STATE_PREFERRED
)
1119 return sprintf(buf
, "1\n");
1121 return sprintf(buf
, "0\n");
1123 static DEVICE_ATTR(preferred_path
, S_IRUGO
, sdev_show_preferred_path
, NULL
);
1127 sdev_show_queue_ramp_up_period(struct device
*dev
,
1128 struct device_attribute
*attr
,
1131 struct scsi_device
*sdev
;
1132 sdev
= to_scsi_device(dev
);
1133 return snprintf(buf
, 20, "%u\n",
1134 jiffies_to_msecs(sdev
->queue_ramp_up_period
));
1138 sdev_store_queue_ramp_up_period(struct device
*dev
,
1139 struct device_attribute
*attr
,
1140 const char *buf
, size_t count
)
1142 struct scsi_device
*sdev
= to_scsi_device(dev
);
1143 unsigned int period
;
1145 if (kstrtouint(buf
, 10, &period
))
1148 sdev
->queue_ramp_up_period
= msecs_to_jiffies(period
);
1152 static DEVICE_ATTR(queue_ramp_up_period
, S_IRUGO
| S_IWUSR
,
1153 sdev_show_queue_ramp_up_period
,
1154 sdev_store_queue_ramp_up_period
);
1156 static umode_t
scsi_sdev_attr_is_visible(struct kobject
*kobj
,
1157 struct attribute
*attr
, int i
)
1159 struct device
*dev
= container_of(kobj
, struct device
, kobj
);
1160 struct scsi_device
*sdev
= to_scsi_device(dev
);
1163 if (attr
== &dev_attr_queue_depth
.attr
&&
1164 !sdev
->host
->hostt
->change_queue_depth
)
1167 if (attr
== &dev_attr_queue_ramp_up_period
.attr
&&
1168 !sdev
->host
->hostt
->change_queue_depth
)
1171 #ifdef CONFIG_SCSI_DH
1172 if (attr
== &dev_attr_access_state
.attr
&&
1175 if (attr
== &dev_attr_preferred_path
.attr
&&
1182 static umode_t
scsi_sdev_bin_attr_is_visible(struct kobject
*kobj
,
1183 struct bin_attribute
*attr
, int i
)
1185 struct device
*dev
= container_of(kobj
, struct device
, kobj
);
1186 struct scsi_device
*sdev
= to_scsi_device(dev
);
1189 if (attr
== &dev_attr_vpd_pg80
&& !sdev
->vpd_pg80
)
1192 if (attr
== &dev_attr_vpd_pg83
&& !sdev
->vpd_pg83
)
1198 /* Default template for device attributes. May NOT be modified */
1199 static struct attribute
*scsi_sdev_attrs
[] = {
1200 &dev_attr_device_blocked
.attr
,
1201 &dev_attr_type
.attr
,
1202 &dev_attr_scsi_level
.attr
,
1203 &dev_attr_device_busy
.attr
,
1204 &dev_attr_vendor
.attr
,
1205 &dev_attr_model
.attr
,
1207 &dev_attr_rescan
.attr
,
1208 &dev_attr_delete
.attr
,
1209 &dev_attr_state
.attr
,
1210 &dev_attr_timeout
.attr
,
1211 &dev_attr_eh_timeout
.attr
,
1212 &dev_attr_iocounterbits
.attr
,
1213 &dev_attr_iorequest_cnt
.attr
,
1214 &dev_attr_iodone_cnt
.attr
,
1215 &dev_attr_ioerr_cnt
.attr
,
1216 &dev_attr_modalias
.attr
,
1217 &dev_attr_queue_depth
.attr
,
1218 &dev_attr_queue_type
.attr
,
1219 &dev_attr_wwid
.attr
,
1220 &dev_attr_blacklist
.attr
,
1221 #ifdef CONFIG_SCSI_DH
1222 &dev_attr_dh_state
.attr
,
1223 &dev_attr_access_state
.attr
,
1224 &dev_attr_preferred_path
.attr
,
1226 &dev_attr_queue_ramp_up_period
.attr
,
1227 REF_EVT(media_change
),
1228 REF_EVT(inquiry_change_reported
),
1229 REF_EVT(capacity_change_reported
),
1230 REF_EVT(soft_threshold_reached
),
1231 REF_EVT(mode_parameter_change_reported
),
1232 REF_EVT(lun_change_reported
),
1236 static struct bin_attribute
*scsi_sdev_bin_attrs
[] = {
1242 static struct attribute_group scsi_sdev_attr_group
= {
1243 .attrs
= scsi_sdev_attrs
,
1244 .bin_attrs
= scsi_sdev_bin_attrs
,
1245 .is_visible
= scsi_sdev_attr_is_visible
,
1246 .is_bin_visible
= scsi_sdev_bin_attr_is_visible
,
1249 static const struct attribute_group
*scsi_sdev_attr_groups
[] = {
1250 &scsi_sdev_attr_group
,
1254 static int scsi_target_add(struct scsi_target
*starget
)
1258 if (starget
->state
!= STARGET_CREATED
)
1261 error
= device_add(&starget
->dev
);
1263 dev_err(&starget
->dev
, "target device_add failed, error %d\n", error
);
1266 transport_add_device(&starget
->dev
);
1267 starget
->state
= STARGET_RUNNING
;
1269 pm_runtime_set_active(&starget
->dev
);
1270 pm_runtime_enable(&starget
->dev
);
1271 device_enable_async_suspend(&starget
->dev
);
1277 * scsi_sysfs_add_sdev - add scsi device to sysfs
1278 * @sdev: scsi_device to add
1281 * 0 on Success / non-zero on Failure
1283 int scsi_sysfs_add_sdev(struct scsi_device
*sdev
)
1286 struct request_queue
*rq
= sdev
->request_queue
;
1287 struct scsi_target
*starget
= sdev
->sdev_target
;
1289 error
= scsi_target_add(starget
);
1293 transport_configure_device(&starget
->dev
);
1295 device_enable_async_suspend(&sdev
->sdev_gendev
);
1296 scsi_autopm_get_target(starget
);
1297 pm_runtime_set_active(&sdev
->sdev_gendev
);
1298 pm_runtime_forbid(&sdev
->sdev_gendev
);
1299 pm_runtime_enable(&sdev
->sdev_gendev
);
1300 scsi_autopm_put_target(starget
);
1302 scsi_autopm_get_device(sdev
);
1304 scsi_dh_add_device(sdev
);
1306 error
= device_add(&sdev
->sdev_gendev
);
1308 sdev_printk(KERN_INFO
, sdev
,
1309 "failed to add device: %d\n", error
);
1313 device_enable_async_suspend(&sdev
->sdev_dev
);
1314 error
= device_add(&sdev
->sdev_dev
);
1316 sdev_printk(KERN_INFO
, sdev
,
1317 "failed to add class device: %d\n", error
);
1318 device_del(&sdev
->sdev_gendev
);
1321 transport_add_device(&sdev
->sdev_gendev
);
1322 sdev
->is_visible
= 1;
1324 error
= bsg_scsi_register_queue(rq
, &sdev
->sdev_gendev
);
1326 /* we're treating error on bsg register as non-fatal,
1327 * so pretend nothing went wrong */
1328 sdev_printk(KERN_INFO
, sdev
,
1329 "Failed to register bsg queue, errno=%d\n", error
);
1331 /* add additional host specific attributes */
1332 if (sdev
->host
->hostt
->sdev_attrs
) {
1333 for (i
= 0; sdev
->host
->hostt
->sdev_attrs
[i
]; i
++) {
1334 error
= device_create_file(&sdev
->sdev_gendev
,
1335 sdev
->host
->hostt
->sdev_attrs
[i
]);
1341 if (sdev
->host
->hostt
->sdev_groups
) {
1342 error
= sysfs_create_groups(&sdev
->sdev_gendev
.kobj
,
1343 sdev
->host
->hostt
->sdev_groups
);
1348 scsi_autopm_put_device(sdev
);
1352 void __scsi_remove_device(struct scsi_device
*sdev
)
1354 struct device
*dev
= &sdev
->sdev_gendev
;
1358 * This cleanup path is not reentrant and while it is impossible
1359 * to get a new reference with scsi_device_get() someone can still
1360 * hold a previously acquired one.
1362 if (sdev
->sdev_state
== SDEV_DEL
)
1365 if (sdev
->is_visible
) {
1367 * If scsi_internal_target_block() is running concurrently,
1368 * wait until it has finished before changing the device state.
1370 mutex_lock(&sdev
->state_mutex
);
1372 * If blocked, we go straight to DEL and restart the queue so
1373 * any commands issued during driver shutdown (like sync
1374 * cache) are errored immediately.
1376 res
= scsi_device_set_state(sdev
, SDEV_CANCEL
);
1378 res
= scsi_device_set_state(sdev
, SDEV_DEL
);
1380 scsi_start_queue(sdev
);
1382 mutex_unlock(&sdev
->state_mutex
);
1387 if (sdev
->host
->hostt
->sdev_groups
)
1388 sysfs_remove_groups(&sdev
->sdev_gendev
.kobj
,
1389 sdev
->host
->hostt
->sdev_groups
);
1391 bsg_unregister_queue(sdev
->request_queue
);
1392 device_unregister(&sdev
->sdev_dev
);
1393 transport_remove_device(dev
);
1396 put_device(&sdev
->sdev_dev
);
1399 * Stop accepting new requests and wait until all queuecommand() and
1400 * scsi_run_queue() invocations have finished before tearing down the
1403 mutex_lock(&sdev
->state_mutex
);
1404 scsi_device_set_state(sdev
, SDEV_DEL
);
1405 mutex_unlock(&sdev
->state_mutex
);
1407 blk_cleanup_queue(sdev
->request_queue
);
1408 cancel_work_sync(&sdev
->requeue_work
);
1410 if (sdev
->host
->hostt
->slave_destroy
)
1411 sdev
->host
->hostt
->slave_destroy(sdev
);
1412 transport_destroy_device(dev
);
1415 * Paired with the kref_get() in scsi_sysfs_initialize(). We have
1416 * remoed sysfs visibility from the device, so make the target
1417 * invisible if this was the last device underneath it.
1419 scsi_target_reap(scsi_target(sdev
));
1425 * scsi_remove_device - unregister a device from the scsi bus
1426 * @sdev: scsi_device to unregister
1428 void scsi_remove_device(struct scsi_device
*sdev
)
1430 struct Scsi_Host
*shost
= sdev
->host
;
1432 mutex_lock(&shost
->scan_mutex
);
1433 __scsi_remove_device(sdev
);
1434 mutex_unlock(&shost
->scan_mutex
);
1436 EXPORT_SYMBOL(scsi_remove_device
);
1438 static void __scsi_remove_target(struct scsi_target
*starget
)
1440 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
1441 unsigned long flags
;
1442 struct scsi_device
*sdev
;
1444 spin_lock_irqsave(shost
->host_lock
, flags
);
1446 list_for_each_entry(sdev
, &shost
->__devices
, siblings
) {
1448 * We cannot call scsi_device_get() here, as
1449 * we might've been called from rmmod() causing
1450 * scsi_device_get() to fail the module_is_live()
1453 if (sdev
->channel
!= starget
->channel
||
1454 sdev
->id
!= starget
->id
)
1456 if (sdev
->sdev_state
== SDEV_DEL
||
1457 sdev
->sdev_state
== SDEV_CANCEL
||
1458 !get_device(&sdev
->sdev_gendev
))
1460 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1461 scsi_remove_device(sdev
);
1462 put_device(&sdev
->sdev_gendev
);
1463 spin_lock_irqsave(shost
->host_lock
, flags
);
1466 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1470 * scsi_remove_target - try to remove a target and all its devices
1471 * @dev: generic starget or parent of generic stargets to be removed
1473 * Note: This is slightly racy. It is possible that if the user
1474 * requests the addition of another device then the target won't be
1477 void scsi_remove_target(struct device
*dev
)
1479 struct Scsi_Host
*shost
= dev_to_shost(dev
->parent
);
1480 struct scsi_target
*starget
;
1481 unsigned long flags
;
1484 spin_lock_irqsave(shost
->host_lock
, flags
);
1485 list_for_each_entry(starget
, &shost
->__targets
, siblings
) {
1486 if (starget
->state
== STARGET_DEL
||
1487 starget
->state
== STARGET_REMOVE
||
1488 starget
->state
== STARGET_CREATED_REMOVE
)
1490 if (starget
->dev
.parent
== dev
|| &starget
->dev
== dev
) {
1491 kref_get(&starget
->reap_ref
);
1492 if (starget
->state
== STARGET_CREATED
)
1493 starget
->state
= STARGET_CREATED_REMOVE
;
1495 starget
->state
= STARGET_REMOVE
;
1496 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1497 __scsi_remove_target(starget
);
1498 scsi_target_reap(starget
);
1502 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1504 EXPORT_SYMBOL(scsi_remove_target
);
1506 int scsi_register_driver(struct device_driver
*drv
)
1508 drv
->bus
= &scsi_bus_type
;
1510 return driver_register(drv
);
1512 EXPORT_SYMBOL(scsi_register_driver
);
1514 int scsi_register_interface(struct class_interface
*intf
)
1516 intf
->class = &sdev_class
;
1518 return class_interface_register(intf
);
1520 EXPORT_SYMBOL(scsi_register_interface
);
1523 * scsi_sysfs_add_host - add scsi host to subsystem
1524 * @shost: scsi host struct to add to subsystem
1526 int scsi_sysfs_add_host(struct Scsi_Host
*shost
)
1530 /* add host specific attributes */
1531 if (shost
->hostt
->shost_attrs
) {
1532 for (i
= 0; shost
->hostt
->shost_attrs
[i
]; i
++) {
1533 error
= device_create_file(&shost
->shost_dev
,
1534 shost
->hostt
->shost_attrs
[i
]);
1540 transport_register_device(&shost
->shost_gendev
);
1541 transport_configure_device(&shost
->shost_gendev
);
1545 static struct device_type scsi_dev_type
= {
1546 .name
= "scsi_device",
1547 .release
= scsi_device_dev_release
,
1548 .groups
= scsi_sdev_attr_groups
,
1551 void scsi_sysfs_device_initialize(struct scsi_device
*sdev
)
1553 unsigned long flags
;
1554 struct Scsi_Host
*shost
= sdev
->host
;
1555 struct scsi_target
*starget
= sdev
->sdev_target
;
1557 device_initialize(&sdev
->sdev_gendev
);
1558 sdev
->sdev_gendev
.bus
= &scsi_bus_type
;
1559 sdev
->sdev_gendev
.type
= &scsi_dev_type
;
1560 dev_set_name(&sdev
->sdev_gendev
, "%d:%d:%d:%llu",
1561 sdev
->host
->host_no
, sdev
->channel
, sdev
->id
, sdev
->lun
);
1563 device_initialize(&sdev
->sdev_dev
);
1564 sdev
->sdev_dev
.parent
= get_device(&sdev
->sdev_gendev
);
1565 sdev
->sdev_dev
.class = &sdev_class
;
1566 dev_set_name(&sdev
->sdev_dev
, "%d:%d:%d:%llu",
1567 sdev
->host
->host_no
, sdev
->channel
, sdev
->id
, sdev
->lun
);
1569 * Get a default scsi_level from the target (derived from sibling
1570 * devices). This is the best we can do for guessing how to set
1571 * sdev->lun_in_cdb for the initial INQUIRY command. For LUN 0 the
1572 * setting doesn't matter, because all the bits are zero anyway.
1573 * But it does matter for higher LUNs.
1575 sdev
->scsi_level
= starget
->scsi_level
;
1576 if (sdev
->scsi_level
<= SCSI_2
&&
1577 sdev
->scsi_level
!= SCSI_UNKNOWN
&&
1578 !shost
->no_scsi2_lun_in_cdb
)
1579 sdev
->lun_in_cdb
= 1;
1581 transport_setup_device(&sdev
->sdev_gendev
);
1582 spin_lock_irqsave(shost
->host_lock
, flags
);
1583 list_add_tail(&sdev
->same_target_siblings
, &starget
->devices
);
1584 list_add_tail(&sdev
->siblings
, &shost
->__devices
);
1585 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1587 * device can now only be removed via __scsi_remove_device() so hold
1588 * the target. Target will be held in CREATED state until something
1589 * beneath it becomes visible (in which case it moves to RUNNING)
1591 kref_get(&starget
->reap_ref
);
1594 int scsi_is_sdev_device(const struct device
*dev
)
1596 return dev
->type
== &scsi_dev_type
;
1598 EXPORT_SYMBOL(scsi_is_sdev_device
);
1600 /* A blank transport template that is used in drivers that don't
1601 * yet implement Transport Attributes */
1602 struct scsi_transport_template blank_transport_template
= { { { {NULL
, }, }, }, };