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/init.h>
11 #include <linux/blkdev.h>
12 #include <linux/device.h>
14 #include <scsi/scsi.h>
15 #include <scsi/scsi_device.h>
16 #include <scsi/scsi_host.h>
17 #include <scsi/scsi_tcq.h>
18 #include <scsi/scsi_transport.h>
19 #include <scsi/scsi_driver.h>
21 #include "scsi_priv.h"
22 #include "scsi_logging.h"
24 static struct device_type scsi_dev_type
;
27 enum scsi_device_state value
;
30 { SDEV_CREATED
, "created" },
31 { SDEV_RUNNING
, "running" },
32 { SDEV_CANCEL
, "cancel" },
33 { SDEV_DEL
, "deleted" },
34 { SDEV_QUIESCE
, "quiesce" },
35 { SDEV_OFFLINE
, "offline" },
36 { SDEV_BLOCK
, "blocked" },
37 { SDEV_CREATED_BLOCK
, "created-blocked" },
40 const char *scsi_device_state_name(enum scsi_device_state state
)
45 for (i
= 0; i
< ARRAY_SIZE(sdev_states
); i
++) {
46 if (sdev_states
[i
].value
== state
) {
47 name
= sdev_states
[i
].name
;
55 enum scsi_host_state value
;
58 { SHOST_CREATED
, "created" },
59 { SHOST_RUNNING
, "running" },
60 { SHOST_CANCEL
, "cancel" },
61 { SHOST_DEL
, "deleted" },
62 { SHOST_RECOVERY
, "recovery" },
63 { SHOST_CANCEL_RECOVERY
, "cancel/recovery" },
64 { SHOST_DEL_RECOVERY
, "deleted/recovery", },
66 const char *scsi_host_state_name(enum scsi_host_state state
)
71 for (i
= 0; i
< ARRAY_SIZE(shost_states
); i
++) {
72 if (shost_states
[i
].value
== state
) {
73 name
= shost_states
[i
].name
;
80 static int check_set(unsigned int *val
, char *src
)
84 if (strncmp(src
, "-", 20) == 0) {
85 *val
= SCAN_WILD_CARD
;
88 * Doesn't check for int overflow
90 *val
= simple_strtoul(src
, &last
, 0);
97 static int scsi_scan(struct Scsi_Host
*shost
, const char *str
)
99 char s1
[15], s2
[15], s3
[15], junk
;
100 unsigned int channel
, id
, lun
;
103 res
= sscanf(str
, "%10s %10s %10s %c", s1
, s2
, s3
, &junk
);
106 if (check_set(&channel
, s1
))
108 if (check_set(&id
, s2
))
110 if (check_set(&lun
, s3
))
112 if (shost
->transportt
->user_scan
)
113 res
= shost
->transportt
->user_scan(shost
, channel
, id
, lun
);
115 res
= scsi_scan_host_selected(shost
, channel
, id
, lun
, 1);
120 * shost_show_function: macro to create an attr function that can be used to
121 * show a non-bit field.
123 #define shost_show_function(name, field, format_string) \
125 show_##name (struct device *dev, struct device_attribute *attr, \
128 struct Scsi_Host *shost = class_to_shost(dev); \
129 return snprintf (buf, 20, format_string, shost->field); \
133 * shost_rd_attr: macro to create a function and attribute variable for a
136 #define shost_rd_attr2(name, field, format_string) \
137 shost_show_function(name, field, format_string) \
138 static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
140 #define shost_rd_attr(field, format_string) \
141 shost_rd_attr2(field, field, format_string)
144 * Create the actual show/store functions and data structures.
148 store_scan(struct device
*dev
, struct device_attribute
*attr
,
149 const char *buf
, size_t count
)
151 struct Scsi_Host
*shost
= class_to_shost(dev
);
154 res
= scsi_scan(shost
, buf
);
159 static DEVICE_ATTR(scan
, S_IWUSR
, NULL
, store_scan
);
162 store_shost_state(struct device
*dev
, struct device_attribute
*attr
,
163 const char *buf
, size_t count
)
166 struct Scsi_Host
*shost
= class_to_shost(dev
);
167 enum scsi_host_state state
= 0;
169 for (i
= 0; i
< ARRAY_SIZE(shost_states
); i
++) {
170 const int len
= strlen(shost_states
[i
].name
);
171 if (strncmp(shost_states
[i
].name
, buf
, len
) == 0 &&
173 state
= shost_states
[i
].value
;
180 if (scsi_host_set_state(shost
, state
))
186 show_shost_state(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
188 struct Scsi_Host
*shost
= class_to_shost(dev
);
189 const char *name
= scsi_host_state_name(shost
->shost_state
);
194 return snprintf(buf
, 20, "%s\n", name
);
197 /* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */
198 struct device_attribute dev_attr_hstate
=
199 __ATTR(state
, S_IRUGO
| S_IWUSR
, show_shost_state
, store_shost_state
);
202 show_shost_mode(unsigned int mode
, char *buf
)
206 if (mode
& MODE_INITIATOR
)
207 len
= sprintf(buf
, "%s", "Initiator");
209 if (mode
& MODE_TARGET
)
210 len
+= sprintf(buf
+ len
, "%s%s", len
? ", " : "", "Target");
212 len
+= sprintf(buf
+ len
, "\n");
218 show_shost_supported_mode(struct device
*dev
, struct device_attribute
*attr
,
221 struct Scsi_Host
*shost
= class_to_shost(dev
);
222 unsigned int supported_mode
= shost
->hostt
->supported_mode
;
224 if (supported_mode
== MODE_UNKNOWN
)
225 /* by default this should be initiator */
226 supported_mode
= MODE_INITIATOR
;
228 return show_shost_mode(supported_mode
, buf
);
231 static DEVICE_ATTR(supported_mode
, S_IRUGO
| S_IWUSR
, show_shost_supported_mode
, NULL
);
234 show_shost_active_mode(struct device
*dev
,
235 struct device_attribute
*attr
, char *buf
)
237 struct Scsi_Host
*shost
= class_to_shost(dev
);
239 if (shost
->active_mode
== MODE_UNKNOWN
)
240 return snprintf(buf
, 20, "unknown\n");
242 return show_shost_mode(shost
->active_mode
, buf
);
245 static DEVICE_ATTR(active_mode
, S_IRUGO
| S_IWUSR
, show_shost_active_mode
, NULL
);
247 shost_rd_attr(unique_id
, "%u\n");
248 shost_rd_attr(host_busy
, "%hu\n");
249 shost_rd_attr(cmd_per_lun
, "%hd\n");
250 shost_rd_attr(can_queue
, "%hd\n");
251 shost_rd_attr(sg_tablesize
, "%hu\n");
252 shost_rd_attr(unchecked_isa_dma
, "%d\n");
253 shost_rd_attr(prot_capabilities
, "%u\n");
254 shost_rd_attr(prot_guard_type
, "%hd\n");
255 shost_rd_attr2(proc_name
, hostt
->proc_name
, "%s\n");
257 static struct attribute
*scsi_sysfs_shost_attrs
[] = {
258 &dev_attr_unique_id
.attr
,
259 &dev_attr_host_busy
.attr
,
260 &dev_attr_cmd_per_lun
.attr
,
261 &dev_attr_can_queue
.attr
,
262 &dev_attr_sg_tablesize
.attr
,
263 &dev_attr_unchecked_isa_dma
.attr
,
264 &dev_attr_proc_name
.attr
,
266 &dev_attr_hstate
.attr
,
267 &dev_attr_supported_mode
.attr
,
268 &dev_attr_active_mode
.attr
,
269 &dev_attr_prot_capabilities
.attr
,
270 &dev_attr_prot_guard_type
.attr
,
274 struct attribute_group scsi_shost_attr_group
= {
275 .attrs
= scsi_sysfs_shost_attrs
,
278 const struct attribute_group
*scsi_sysfs_shost_attr_groups
[] = {
279 &scsi_shost_attr_group
,
283 static void scsi_device_cls_release(struct device
*class_dev
)
285 struct scsi_device
*sdev
;
287 sdev
= class_to_sdev(class_dev
);
288 put_device(&sdev
->sdev_gendev
);
291 static void scsi_device_dev_release_usercontext(struct work_struct
*work
)
293 struct scsi_device
*sdev
;
294 struct device
*parent
;
295 struct scsi_target
*starget
;
296 struct list_head
*this, *tmp
;
299 sdev
= container_of(work
, struct scsi_device
, ew
.work
);
301 parent
= sdev
->sdev_gendev
.parent
;
302 starget
= to_scsi_target(parent
);
304 spin_lock_irqsave(sdev
->host
->host_lock
, flags
);
306 list_del(&sdev
->siblings
);
307 list_del(&sdev
->same_target_siblings
);
308 list_del(&sdev
->starved_entry
);
309 spin_unlock_irqrestore(sdev
->host
->host_lock
, flags
);
311 cancel_work_sync(&sdev
->event_work
);
313 list_for_each_safe(this, tmp
, &sdev
->event_list
) {
314 struct scsi_event
*evt
;
316 evt
= list_entry(this, struct scsi_event
, node
);
317 list_del(&evt
->node
);
321 if (sdev
->request_queue
) {
322 sdev
->request_queue
->queuedata
= NULL
;
323 /* user context needed to free queue */
324 scsi_free_queue(sdev
->request_queue
);
325 /* temporary expedient, try to catch use of queue lock
326 * after free of sdev */
327 sdev
->request_queue
= NULL
;
330 scsi_target_reap(scsi_target(sdev
));
332 kfree(sdev
->inquiry
);
339 static void scsi_device_dev_release(struct device
*dev
)
341 struct scsi_device
*sdp
= to_scsi_device(dev
);
342 execute_in_process_context(scsi_device_dev_release_usercontext
,
346 static struct class sdev_class
= {
347 .name
= "scsi_device",
348 .dev_release
= scsi_device_cls_release
,
351 /* all probing is done in the individual ->probe routines */
352 static int scsi_bus_match(struct device
*dev
, struct device_driver
*gendrv
)
354 struct scsi_device
*sdp
;
356 if (dev
->type
!= &scsi_dev_type
)
359 sdp
= to_scsi_device(dev
);
360 if (sdp
->no_uld_attach
)
362 return (sdp
->inq_periph_qual
== SCSI_INQ_PQ_CON
)? 1: 0;
365 static int scsi_bus_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
367 struct scsi_device
*sdev
;
369 if (dev
->type
!= &scsi_dev_type
)
372 sdev
= to_scsi_device(dev
);
374 add_uevent_var(env
, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT
, sdev
->type
);
378 static int scsi_bus_suspend(struct device
* dev
, pm_message_t state
)
380 struct device_driver
*drv
;
381 struct scsi_device
*sdev
;
384 if (dev
->type
!= &scsi_dev_type
)
388 sdev
= to_scsi_device(dev
);
390 err
= scsi_device_quiesce(sdev
);
394 if (drv
&& drv
->suspend
) {
395 err
= drv
->suspend(dev
, state
);
403 static int scsi_bus_resume(struct device
* dev
)
405 struct device_driver
*drv
;
406 struct scsi_device
*sdev
;
409 if (dev
->type
!= &scsi_dev_type
)
413 sdev
= to_scsi_device(dev
);
415 if (drv
&& drv
->resume
)
416 err
= drv
->resume(dev
);
418 scsi_device_resume(sdev
);
423 struct bus_type scsi_bus_type
= {
425 .match
= scsi_bus_match
,
426 .uevent
= scsi_bus_uevent
,
427 .suspend
= scsi_bus_suspend
,
428 .resume
= scsi_bus_resume
,
430 EXPORT_SYMBOL_GPL(scsi_bus_type
);
432 int scsi_sysfs_register(void)
436 error
= bus_register(&scsi_bus_type
);
438 error
= class_register(&sdev_class
);
440 bus_unregister(&scsi_bus_type
);
446 void scsi_sysfs_unregister(void)
448 class_unregister(&sdev_class
);
449 bus_unregister(&scsi_bus_type
);
453 * sdev_show_function: macro to create an attr function that can be used to
454 * show a non-bit field.
456 #define sdev_show_function(field, format_string) \
458 sdev_show_##field (struct device *dev, struct device_attribute *attr, \
461 struct scsi_device *sdev; \
462 sdev = to_scsi_device(dev); \
463 return snprintf (buf, 20, format_string, sdev->field); \
467 * sdev_rd_attr: macro to create a function and attribute variable for a
470 #define sdev_rd_attr(field, format_string) \
471 sdev_show_function(field, format_string) \
472 static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL);
476 * sdev_rd_attr: create a function and attribute variable for a
479 #define sdev_rw_attr(field, format_string) \
480 sdev_show_function(field, format_string) \
483 sdev_store_##field (struct device *dev, struct device_attribute *attr, \
484 const char *buf, size_t count) \
486 struct scsi_device *sdev; \
487 sdev = to_scsi_device(dev); \
488 snscanf (buf, 20, format_string, &sdev->field); \
491 static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
493 /* Currently we don't export bit fields, but we might in future,
494 * so leave this code in */
497 * sdev_rd_attr: create a function and attribute variable for a
498 * read/write bit field.
500 #define sdev_rw_attr_bit(field) \
501 sdev_show_function(field, "%d\n") \
504 sdev_store_##field (struct device *dev, struct device_attribute *attr, \
505 const char *buf, size_t count) \
508 struct scsi_device *sdev; \
509 ret = scsi_sdev_check_buf_bit(buf); \
511 sdev = to_scsi_device(dev); \
517 static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
520 * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1",
521 * else return -EINVAL.
523 static int scsi_sdev_check_buf_bit(const char *buf
)
525 if ((buf
[1] == '\0') || ((buf
[1] == '\n') && (buf
[2] == '\0'))) {
528 else if (buf
[0] == '0')
537 * Create the actual show/store functions and data structures.
539 sdev_rd_attr (device_blocked
, "%d\n");
540 sdev_rd_attr (queue_depth
, "%d\n");
541 sdev_rd_attr (type
, "%d\n");
542 sdev_rd_attr (scsi_level
, "%d\n");
543 sdev_rd_attr (vendor
, "%.8s\n");
544 sdev_rd_attr (model
, "%.16s\n");
545 sdev_rd_attr (rev
, "%.4s\n");
548 * TODO: can we make these symlinks to the block layer ones?
551 sdev_show_timeout (struct device
*dev
, struct device_attribute
*attr
, char *buf
)
553 struct scsi_device
*sdev
;
554 sdev
= to_scsi_device(dev
);
555 return snprintf(buf
, 20, "%d\n", sdev
->request_queue
->rq_timeout
/ HZ
);
559 sdev_store_timeout (struct device
*dev
, struct device_attribute
*attr
,
560 const char *buf
, size_t count
)
562 struct scsi_device
*sdev
;
564 sdev
= to_scsi_device(dev
);
565 sscanf (buf
, "%d\n", &timeout
);
566 blk_queue_rq_timeout(sdev
->request_queue
, timeout
* HZ
);
569 static DEVICE_ATTR(timeout
, S_IRUGO
| S_IWUSR
, sdev_show_timeout
, sdev_store_timeout
);
572 store_rescan_field (struct device
*dev
, struct device_attribute
*attr
,
573 const char *buf
, size_t count
)
575 scsi_rescan_device(dev
);
578 static DEVICE_ATTR(rescan
, S_IWUSR
, NULL
, store_rescan_field
);
580 static void sdev_store_delete_callback(struct device
*dev
)
582 scsi_remove_device(to_scsi_device(dev
));
586 sdev_store_delete(struct device
*dev
, struct device_attribute
*attr
,
587 const char *buf
, size_t count
)
591 /* An attribute cannot be unregistered by one of its own methods,
592 * so we have to use this roundabout approach.
594 rc
= device_schedule_callback(dev
, sdev_store_delete_callback
);
599 static DEVICE_ATTR(delete, S_IWUSR
, NULL
, sdev_store_delete
);
602 store_state_field(struct device
*dev
, struct device_attribute
*attr
,
603 const char *buf
, size_t count
)
606 struct scsi_device
*sdev
= to_scsi_device(dev
);
607 enum scsi_device_state state
= 0;
609 for (i
= 0; i
< ARRAY_SIZE(sdev_states
); i
++) {
610 const int len
= strlen(sdev_states
[i
].name
);
611 if (strncmp(sdev_states
[i
].name
, buf
, len
) == 0 &&
613 state
= sdev_states
[i
].value
;
620 if (scsi_device_set_state(sdev
, state
))
626 show_state_field(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
628 struct scsi_device
*sdev
= to_scsi_device(dev
);
629 const char *name
= scsi_device_state_name(sdev
->sdev_state
);
634 return snprintf(buf
, 20, "%s\n", name
);
637 static DEVICE_ATTR(state
, S_IRUGO
| S_IWUSR
, show_state_field
, store_state_field
);
640 show_queue_type_field(struct device
*dev
, struct device_attribute
*attr
,
643 struct scsi_device
*sdev
= to_scsi_device(dev
);
644 const char *name
= "none";
646 if (sdev
->ordered_tags
)
648 else if (sdev
->simple_tags
)
651 return snprintf(buf
, 20, "%s\n", name
);
654 static DEVICE_ATTR(queue_type
, S_IRUGO
, show_queue_type_field
, NULL
);
657 show_iostat_counterbits(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
659 return snprintf(buf
, 20, "%d\n", (int)sizeof(atomic_t
) * 8);
662 static DEVICE_ATTR(iocounterbits
, S_IRUGO
, show_iostat_counterbits
, NULL
);
664 #define show_sdev_iostat(field) \
666 show_iostat_##field(struct device *dev, struct device_attribute *attr, \
669 struct scsi_device *sdev = to_scsi_device(dev); \
670 unsigned long long count = atomic_read(&sdev->field); \
671 return snprintf(buf, 20, "0x%llx\n", count); \
673 static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL)
675 show_sdev_iostat(iorequest_cnt
);
676 show_sdev_iostat(iodone_cnt
);
677 show_sdev_iostat(ioerr_cnt
);
680 sdev_show_modalias(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
682 struct scsi_device
*sdev
;
683 sdev
= to_scsi_device(dev
);
684 return snprintf (buf
, 20, SCSI_DEVICE_MODALIAS_FMT
"\n", sdev
->type
);
686 static DEVICE_ATTR(modalias
, S_IRUGO
, sdev_show_modalias
, NULL
);
688 #define DECLARE_EVT_SHOW(name, Cap_name) \
690 sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \
693 struct scsi_device *sdev = to_scsi_device(dev); \
694 int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\
695 return snprintf(buf, 20, "%d\n", val); \
698 #define DECLARE_EVT_STORE(name, Cap_name) \
700 sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\
701 const char *buf, size_t count) \
703 struct scsi_device *sdev = to_scsi_device(dev); \
704 int val = simple_strtoul(buf, NULL, 0); \
706 clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
708 set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
714 #define DECLARE_EVT(name, Cap_name) \
715 DECLARE_EVT_SHOW(name, Cap_name) \
716 DECLARE_EVT_STORE(name, Cap_name) \
717 static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \
718 sdev_store_evt_##name);
719 #define REF_EVT(name) &dev_attr_evt_##name.attr
721 DECLARE_EVT(media_change
, MEDIA_CHANGE
)
723 /* Default template for device attributes. May NOT be modified */
724 static struct attribute
*scsi_sdev_attrs
[] = {
725 &dev_attr_device_blocked
.attr
,
727 &dev_attr_scsi_level
.attr
,
728 &dev_attr_vendor
.attr
,
729 &dev_attr_model
.attr
,
731 &dev_attr_rescan
.attr
,
732 &dev_attr_delete
.attr
,
733 &dev_attr_state
.attr
,
734 &dev_attr_timeout
.attr
,
735 &dev_attr_iocounterbits
.attr
,
736 &dev_attr_iorequest_cnt
.attr
,
737 &dev_attr_iodone_cnt
.attr
,
738 &dev_attr_ioerr_cnt
.attr
,
739 &dev_attr_modalias
.attr
,
740 REF_EVT(media_change
),
744 static struct attribute_group scsi_sdev_attr_group
= {
745 .attrs
= scsi_sdev_attrs
,
748 static const struct attribute_group
*scsi_sdev_attr_groups
[] = {
749 &scsi_sdev_attr_group
,
754 sdev_store_queue_depth_rw(struct device
*dev
, struct device_attribute
*attr
,
755 const char *buf
, size_t count
)
758 struct scsi_device
*sdev
= to_scsi_device(dev
);
759 struct scsi_host_template
*sht
= sdev
->host
->hostt
;
761 if (!sht
->change_queue_depth
)
764 depth
= simple_strtoul(buf
, NULL
, 0);
769 retval
= sht
->change_queue_depth(sdev
, depth
);
776 static struct device_attribute sdev_attr_queue_depth_rw
=
777 __ATTR(queue_depth
, S_IRUGO
| S_IWUSR
, sdev_show_queue_depth
,
778 sdev_store_queue_depth_rw
);
781 sdev_store_queue_type_rw(struct device
*dev
, struct device_attribute
*attr
,
782 const char *buf
, size_t count
)
784 struct scsi_device
*sdev
= to_scsi_device(dev
);
785 struct scsi_host_template
*sht
= sdev
->host
->hostt
;
786 int tag_type
= 0, retval
;
787 int prev_tag_type
= scsi_get_tag_type(sdev
);
789 if (!sdev
->tagged_supported
|| !sht
->change_queue_type
)
792 if (strncmp(buf
, "ordered", 7) == 0)
793 tag_type
= MSG_ORDERED_TAG
;
794 else if (strncmp(buf
, "simple", 6) == 0)
795 tag_type
= MSG_SIMPLE_TAG
;
796 else if (strncmp(buf
, "none", 4) != 0)
799 if (tag_type
== prev_tag_type
)
802 retval
= sht
->change_queue_type(sdev
, tag_type
);
809 static int scsi_target_add(struct scsi_target
*starget
)
813 if (starget
->state
!= STARGET_CREATED
)
816 error
= device_add(&starget
->dev
);
818 dev_err(&starget
->dev
, "target device_add failed, error %d\n", error
);
819 get_device(&starget
->dev
);
820 scsi_target_reap(starget
);
821 put_device(&starget
->dev
);
824 transport_add_device(&starget
->dev
);
825 starget
->state
= STARGET_RUNNING
;
830 static struct device_attribute sdev_attr_queue_type_rw
=
831 __ATTR(queue_type
, S_IRUGO
| S_IWUSR
, show_queue_type_field
,
832 sdev_store_queue_type_rw
);
835 * scsi_sysfs_add_sdev - add scsi device to sysfs
836 * @sdev: scsi_device to add
839 * 0 on Success / non-zero on Failure
841 int scsi_sysfs_add_sdev(struct scsi_device
*sdev
)
844 struct request_queue
*rq
= sdev
->request_queue
;
845 struct scsi_target
*starget
= sdev
->sdev_target
;
847 if ((error
= scsi_device_set_state(sdev
, SDEV_RUNNING
)) != 0)
850 error
= scsi_target_add(starget
);
854 transport_configure_device(&starget
->dev
);
855 error
= device_add(&sdev
->sdev_gendev
);
857 printk(KERN_INFO
"error 1\n");
860 error
= device_add(&sdev
->sdev_dev
);
862 printk(KERN_INFO
"error 2\n");
863 device_del(&sdev
->sdev_gendev
);
866 transport_add_device(&sdev
->sdev_gendev
);
867 sdev
->is_visible
= 1;
869 /* create queue files, which may be writable, depending on the host */
870 if (sdev
->host
->hostt
->change_queue_depth
)
871 error
= device_create_file(&sdev
->sdev_gendev
, &sdev_attr_queue_depth_rw
);
873 error
= device_create_file(&sdev
->sdev_gendev
, &dev_attr_queue_depth
);
877 if (sdev
->host
->hostt
->change_queue_type
)
878 error
= device_create_file(&sdev
->sdev_gendev
, &sdev_attr_queue_type_rw
);
880 error
= device_create_file(&sdev
->sdev_gendev
, &dev_attr_queue_type
);
884 error
= bsg_register_queue(rq
, &sdev
->sdev_gendev
, NULL
, NULL
);
887 /* we're treating error on bsg register as non-fatal,
888 * so pretend nothing went wrong */
889 sdev_printk(KERN_INFO
, sdev
,
890 "Failed to register bsg queue, errno=%d\n", error
);
892 /* add additional host specific attributes */
893 if (sdev
->host
->hostt
->sdev_attrs
) {
894 for (i
= 0; sdev
->host
->hostt
->sdev_attrs
[i
]; i
++) {
895 error
= device_create_file(&sdev
->sdev_gendev
,
896 sdev
->host
->hostt
->sdev_attrs
[i
]);
905 __scsi_remove_device(sdev
);
910 void __scsi_remove_device(struct scsi_device
*sdev
)
912 struct device
*dev
= &sdev
->sdev_gendev
;
914 if (sdev
->is_visible
) {
915 if (scsi_device_set_state(sdev
, SDEV_CANCEL
) != 0)
918 bsg_unregister_queue(sdev
->request_queue
);
919 device_unregister(&sdev
->sdev_dev
);
920 transport_remove_device(dev
);
923 put_device(&sdev
->sdev_dev
);
924 scsi_device_set_state(sdev
, SDEV_DEL
);
925 if (sdev
->host
->hostt
->slave_destroy
)
926 sdev
->host
->hostt
->slave_destroy(sdev
);
927 transport_destroy_device(dev
);
932 * scsi_remove_device - unregister a device from the scsi bus
933 * @sdev: scsi_device to unregister
935 void scsi_remove_device(struct scsi_device
*sdev
)
937 struct Scsi_Host
*shost
= sdev
->host
;
939 mutex_lock(&shost
->scan_mutex
);
940 __scsi_remove_device(sdev
);
941 mutex_unlock(&shost
->scan_mutex
);
943 EXPORT_SYMBOL(scsi_remove_device
);
945 static void __scsi_remove_target(struct scsi_target
*starget
)
947 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
949 struct scsi_device
*sdev
;
951 spin_lock_irqsave(shost
->host_lock
, flags
);
954 list_for_each_entry(sdev
, &shost
->__devices
, siblings
) {
955 if (sdev
->channel
!= starget
->channel
||
956 sdev
->id
!= starget
->id
||
957 sdev
->sdev_state
== SDEV_DEL
)
959 spin_unlock_irqrestore(shost
->host_lock
, flags
);
960 scsi_remove_device(sdev
);
961 spin_lock_irqsave(shost
->host_lock
, flags
);
964 spin_unlock_irqrestore(shost
->host_lock
, flags
);
965 scsi_target_reap(starget
);
968 static int __remove_child (struct device
* dev
, void * data
)
970 if (scsi_is_target_device(dev
))
971 __scsi_remove_target(to_scsi_target(dev
));
976 * scsi_remove_target - try to remove a target and all its devices
977 * @dev: generic starget or parent of generic stargets to be removed
979 * Note: This is slightly racy. It is possible that if the user
980 * requests the addition of another device then the target won't be
983 void scsi_remove_target(struct device
*dev
)
987 if (scsi_is_target_device(dev
)) {
988 __scsi_remove_target(to_scsi_target(dev
));
992 rdev
= get_device(dev
);
993 device_for_each_child(dev
, NULL
, __remove_child
);
996 EXPORT_SYMBOL(scsi_remove_target
);
998 int scsi_register_driver(struct device_driver
*drv
)
1000 drv
->bus
= &scsi_bus_type
;
1002 return driver_register(drv
);
1004 EXPORT_SYMBOL(scsi_register_driver
);
1006 int scsi_register_interface(struct class_interface
*intf
)
1008 intf
->class = &sdev_class
;
1010 return class_interface_register(intf
);
1012 EXPORT_SYMBOL(scsi_register_interface
);
1015 * scsi_sysfs_add_host - add scsi host to subsystem
1016 * @shost: scsi host struct to add to subsystem
1018 int scsi_sysfs_add_host(struct Scsi_Host
*shost
)
1022 /* add host specific attributes */
1023 if (shost
->hostt
->shost_attrs
) {
1024 for (i
= 0; shost
->hostt
->shost_attrs
[i
]; i
++) {
1025 error
= device_create_file(&shost
->shost_dev
,
1026 shost
->hostt
->shost_attrs
[i
]);
1032 transport_register_device(&shost
->shost_gendev
);
1033 transport_configure_device(&shost
->shost_gendev
);
1037 static struct device_type scsi_dev_type
= {
1038 .name
= "scsi_device",
1039 .release
= scsi_device_dev_release
,
1040 .groups
= scsi_sdev_attr_groups
,
1043 void scsi_sysfs_device_initialize(struct scsi_device
*sdev
)
1045 unsigned long flags
;
1046 struct Scsi_Host
*shost
= sdev
->host
;
1047 struct scsi_target
*starget
= sdev
->sdev_target
;
1049 device_initialize(&sdev
->sdev_gendev
);
1050 sdev
->sdev_gendev
.bus
= &scsi_bus_type
;
1051 sdev
->sdev_gendev
.type
= &scsi_dev_type
;
1052 dev_set_name(&sdev
->sdev_gendev
, "%d:%d:%d:%d",
1053 sdev
->host
->host_no
, sdev
->channel
, sdev
->id
, sdev
->lun
);
1055 device_initialize(&sdev
->sdev_dev
);
1056 sdev
->sdev_dev
.parent
= get_device(&sdev
->sdev_gendev
);
1057 sdev
->sdev_dev
.class = &sdev_class
;
1058 dev_set_name(&sdev
->sdev_dev
, "%d:%d:%d:%d",
1059 sdev
->host
->host_no
, sdev
->channel
, sdev
->id
, sdev
->lun
);
1060 sdev
->scsi_level
= starget
->scsi_level
;
1061 transport_setup_device(&sdev
->sdev_gendev
);
1062 spin_lock_irqsave(shost
->host_lock
, flags
);
1063 list_add_tail(&sdev
->same_target_siblings
, &starget
->devices
);
1064 list_add_tail(&sdev
->siblings
, &shost
->__devices
);
1065 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1068 int scsi_is_sdev_device(const struct device
*dev
)
1070 return dev
->type
== &scsi_dev_type
;
1072 EXPORT_SYMBOL(scsi_is_sdev_device
);
1074 /* A blank transport template that is used in drivers that don't
1075 * yet implement Transport Attributes */
1076 struct scsi_transport_template blank_transport_template
= { { { {NULL
, }, }, }, };