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>
20 #include "scsi_priv.h"
21 #include "scsi_logging.h"
24 enum scsi_device_state value;
27 { SDEV_CREATED, "created" },
28 { SDEV_RUNNING, "running" },
29 { SDEV_CANCEL, "cancel" },
30 { SDEV_DEL, "deleted" },
31 { SDEV_QUIESCE, "quiesce" },
32 { SDEV_OFFLINE, "offline" },
33 { SDEV_BLOCK, "blocked" },
36 const char *scsi_device_state_name(enum scsi_device_state state)
41 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
42 if (sdev_states[i].value == state) {
43 name = sdev_states[i].name;
51 enum scsi_host_state value;
54 { SHOST_CREATED, "created" },
55 { SHOST_RUNNING, "running" },
56 { SHOST_CANCEL, "cancel" },
57 { SHOST_DEL, "deleted" },
58 { SHOST_RECOVERY, "recovery" },
59 { SHOST_CANCEL_RECOVERY, "cancel/recovery" },
60 { SHOST_DEL_RECOVERY, "deleted/recovery", },
62 const char *scsi_host_state_name(enum scsi_host_state state)
67 for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
68 if (shost_states[i].value == state) {
69 name = shost_states[i].name;
76 static int check_set(unsigned int *val, char *src)
80 if (strncmp(src, "-", 20) == 0) {
81 *val = SCAN_WILD_CARD;
84 * Doesn't check for int overflow
86 *val = simple_strtoul(src, &last, 0);
93 static int scsi_scan(struct Scsi_Host *shost, const char *str)
95 char s1[15], s2[15], s3[15], junk;
96 unsigned int channel, id, lun;
99 res = sscanf(str, "%10s %10s %10s %c", s1, s2, s3, &junk);
102 if (check_set(&channel, s1))
104 if (check_set(&id, s2))
106 if (check_set(&lun, s3))
108 if (shost->transportt->user_scan)
109 res = shost->transportt->user_scan(shost, channel, id, lun);
111 res = scsi_scan_host_selected(shost, channel, id, lun, 1);
116 * shost_show_function: macro to create an attr function that can be used to
117 * show a non-bit field.
119 #define shost_show_function(name, field, format_string) \
121 show_##name (struct class_device *class_dev, char *buf) \
123 struct Scsi_Host *shost = class_to_shost(class_dev); \
124 return snprintf (buf, 20, format_string, shost->field); \
128 * shost_rd_attr: macro to create a function and attribute variable for a
131 #define shost_rd_attr2(name, field, format_string) \
132 shost_show_function(name, field, format_string) \
133 static CLASS_DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
135 #define shost_rd_attr(field, format_string) \
136 shost_rd_attr2(field, field, format_string)
139 * Create the actual show/store functions and data structures.
142 static ssize_t store_scan(struct class_device *class_dev, const char *buf,
145 struct Scsi_Host *shost = class_to_shost(class_dev);
148 res = scsi_scan(shost, buf);
153 static CLASS_DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan);
156 store_shost_state(struct class_device *class_dev, const char *buf, size_t count)
159 struct Scsi_Host *shost = class_to_shost(class_dev);
160 enum scsi_host_state state = 0;
162 for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
163 const int len = strlen(shost_states[i].name);
164 if (strncmp(shost_states[i].name, buf, len) == 0 &&
166 state = shost_states[i].value;
173 if (scsi_host_set_state(shost, state))
179 show_shost_state(struct class_device *class_dev, char *buf)
181 struct Scsi_Host *shost = class_to_shost(class_dev);
182 const char *name = scsi_host_state_name(shost->shost_state);
187 return snprintf(buf, 20, "%s\n", name);
190 static CLASS_DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state);
192 shost_rd_attr(unique_id, "%u\n");
193 shost_rd_attr(host_busy, "%hu\n");
194 shost_rd_attr(cmd_per_lun, "%hd\n");
195 shost_rd_attr(can_queue, "%hd\n");
196 shost_rd_attr(sg_tablesize, "%hu\n");
197 shost_rd_attr(unchecked_isa_dma, "%d\n");
198 shost_rd_attr2(proc_name, hostt->proc_name, "%s\n");
200 static struct class_device_attribute *scsi_sysfs_shost_attrs[] = {
201 &class_device_attr_unique_id,
202 &class_device_attr_host_busy,
203 &class_device_attr_cmd_per_lun,
204 &class_device_attr_can_queue,
205 &class_device_attr_sg_tablesize,
206 &class_device_attr_unchecked_isa_dma,
207 &class_device_attr_proc_name,
208 &class_device_attr_scan,
209 &class_device_attr_state,
213 static void scsi_device_cls_release(struct class_device *class_dev)
215 struct scsi_device *sdev;
217 sdev = class_to_sdev(class_dev);
218 put_device(&sdev->sdev_gendev);
221 static void scsi_device_dev_release_usercontext(struct work_struct *work)
223 struct scsi_device *sdev;
224 struct device *parent;
225 struct scsi_target *starget;
228 sdev = container_of(work, struct scsi_device, ew.work);
230 parent = sdev->sdev_gendev.parent;
231 starget = to_scsi_target(parent);
233 spin_lock_irqsave(sdev->host->host_lock, flags);
235 list_del(&sdev->siblings);
236 list_del(&sdev->same_target_siblings);
237 list_del(&sdev->starved_entry);
238 spin_unlock_irqrestore(sdev->host->host_lock, flags);
240 if (sdev->request_queue) {
241 sdev->request_queue->queuedata = NULL;
242 /* user context needed to free queue */
243 scsi_free_queue(sdev->request_queue);
244 /* temporary expedient, try to catch use of queue lock
245 * after free of sdev */
246 sdev->request_queue = NULL;
249 scsi_target_reap(scsi_target(sdev));
251 kfree(sdev->inquiry);
258 static void scsi_device_dev_release(struct device *dev)
260 struct scsi_device *sdp = to_scsi_device(dev);
261 execute_in_process_context(scsi_device_dev_release_usercontext,
265 static struct class sdev_class = {
266 .name = "scsi_device",
267 .release = scsi_device_cls_release,
270 /* all probing is done in the individual ->probe routines */
271 static int scsi_bus_match(struct device *dev, struct device_driver *gendrv)
273 struct scsi_device *sdp = to_scsi_device(dev);
274 if (sdp->no_uld_attach)
276 return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0;
279 static int scsi_bus_suspend(struct device * dev, pm_message_t state)
281 struct device_driver *drv = dev->driver;
282 struct scsi_device *sdev = to_scsi_device(dev);
283 struct scsi_host_template *sht = sdev->host->hostt;
286 err = scsi_device_quiesce(sdev);
290 /* call HLD suspend first */
291 if (drv && drv->suspend) {
292 err = drv->suspend(dev, state);
297 /* then, call host suspend */
299 err = sht->suspend(sdev, state);
301 if (drv && drv->resume)
310 static int scsi_bus_resume(struct device * dev)
312 struct device_driver *drv = dev->driver;
313 struct scsi_device *sdev = to_scsi_device(dev);
314 struct scsi_host_template *sht = sdev->host->hostt;
315 int err = 0, err2 = 0;
317 /* call host resume first */
319 err = sht->resume(sdev);
321 /* then, call HLD resume */
322 if (drv && drv->resume)
323 err2 = drv->resume(dev);
325 scsi_device_resume(sdev);
327 /* favor LLD failure */
328 return err ? err : err2;;
331 struct bus_type scsi_bus_type = {
333 .match = scsi_bus_match,
334 .suspend = scsi_bus_suspend,
335 .resume = scsi_bus_resume,
338 int scsi_sysfs_register(void)
342 error = bus_register(&scsi_bus_type);
344 error = class_register(&sdev_class);
346 bus_unregister(&scsi_bus_type);
352 void scsi_sysfs_unregister(void)
354 class_unregister(&sdev_class);
355 bus_unregister(&scsi_bus_type);
359 * sdev_show_function: macro to create an attr function that can be used to
360 * show a non-bit field.
362 #define sdev_show_function(field, format_string) \
364 sdev_show_##field (struct device *dev, struct device_attribute *attr, char *buf) \
366 struct scsi_device *sdev; \
367 sdev = to_scsi_device(dev); \
368 return snprintf (buf, 20, format_string, sdev->field); \
372 * sdev_rd_attr: macro to create a function and attribute variable for a
375 #define sdev_rd_attr(field, format_string) \
376 sdev_show_function(field, format_string) \
377 static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL);
381 * sdev_rd_attr: create a function and attribute variable for a
384 #define sdev_rw_attr(field, format_string) \
385 sdev_show_function(field, format_string) \
388 sdev_store_##field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
390 struct scsi_device *sdev; \
391 sdev = to_scsi_device(dev); \
392 snscanf (buf, 20, format_string, &sdev->field); \
395 static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
397 /* Currently we don't export bit fields, but we might in future,
398 * so leave this code in */
401 * sdev_rd_attr: create a function and attribute variable for a
402 * read/write bit field.
404 #define sdev_rw_attr_bit(field) \
405 sdev_show_function(field, "%d\n") \
408 sdev_store_##field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
411 struct scsi_device *sdev; \
412 ret = scsi_sdev_check_buf_bit(buf); \
414 sdev = to_scsi_device(dev); \
420 static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
423 * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1",
424 * else return -EINVAL.
426 static int scsi_sdev_check_buf_bit(const char *buf)
428 if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
431 else if (buf[0] == '0')
440 * Create the actual show/store functions and data structures.
442 sdev_rd_attr (device_blocked, "%d\n");
443 sdev_rd_attr (queue_depth, "%d\n");
444 sdev_rd_attr (type, "%d\n");
445 sdev_rd_attr (scsi_level, "%d\n");
446 sdev_rd_attr (vendor, "%.8s\n");
447 sdev_rd_attr (model, "%.16s\n");
448 sdev_rd_attr (rev, "%.4s\n");
451 sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf)
453 struct scsi_device *sdev;
454 sdev = to_scsi_device(dev);
455 return snprintf (buf, 20, "%d\n", sdev->timeout / HZ);
459 sdev_store_timeout (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
461 struct scsi_device *sdev;
463 sdev = to_scsi_device(dev);
464 sscanf (buf, "%d\n", &timeout);
465 sdev->timeout = timeout * HZ;
468 static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout);
471 store_rescan_field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
473 scsi_rescan_device(dev);
476 static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field);
478 static ssize_t sdev_store_delete(struct device *dev, struct device_attribute *attr, const char *buf,
481 scsi_remove_device(to_scsi_device(dev));
484 static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete);
487 store_state_field(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
490 struct scsi_device *sdev = to_scsi_device(dev);
491 enum scsi_device_state state = 0;
493 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
494 const int len = strlen(sdev_states[i].name);
495 if (strncmp(sdev_states[i].name, buf, len) == 0 &&
497 state = sdev_states[i].value;
504 if (scsi_device_set_state(sdev, state))
510 show_state_field(struct device *dev, struct device_attribute *attr, char *buf)
512 struct scsi_device *sdev = to_scsi_device(dev);
513 const char *name = scsi_device_state_name(sdev->sdev_state);
518 return snprintf(buf, 20, "%s\n", name);
521 static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field);
524 show_queue_type_field(struct device *dev, struct device_attribute *attr, char *buf)
526 struct scsi_device *sdev = to_scsi_device(dev);
527 const char *name = "none";
529 if (sdev->ordered_tags)
531 else if (sdev->simple_tags)
534 return snprintf(buf, 20, "%s\n", name);
537 static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL);
540 show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf)
542 return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8);
545 static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL);
547 #define show_sdev_iostat(field) \
549 show_iostat_##field(struct device *dev, struct device_attribute *attr, char *buf) \
551 struct scsi_device *sdev = to_scsi_device(dev); \
552 unsigned long long count = atomic_read(&sdev->field); \
553 return snprintf(buf, 20, "0x%llx\n", count); \
555 static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL)
557 show_sdev_iostat(iorequest_cnt);
558 show_sdev_iostat(iodone_cnt);
559 show_sdev_iostat(ioerr_cnt);
562 /* Default template for device attributes. May NOT be modified */
563 static struct device_attribute *scsi_sysfs_sdev_attrs[] = {
564 &dev_attr_device_blocked,
565 &dev_attr_queue_depth,
566 &dev_attr_queue_type,
568 &dev_attr_scsi_level,
576 &dev_attr_iocounterbits,
577 &dev_attr_iorequest_cnt,
578 &dev_attr_iodone_cnt,
583 static ssize_t sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr, const char *buf,
587 struct scsi_device *sdev = to_scsi_device(dev);
588 struct scsi_host_template *sht = sdev->host->hostt;
590 if (!sht->change_queue_depth)
593 depth = simple_strtoul(buf, NULL, 0);
598 retval = sht->change_queue_depth(sdev, depth);
605 static struct device_attribute sdev_attr_queue_depth_rw =
606 __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth,
607 sdev_store_queue_depth_rw);
609 static ssize_t sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr, const char *buf,
612 struct scsi_device *sdev = to_scsi_device(dev);
613 struct scsi_host_template *sht = sdev->host->hostt;
614 int tag_type = 0, retval;
615 int prev_tag_type = scsi_get_tag_type(sdev);
617 if (!sdev->tagged_supported || !sht->change_queue_type)
620 if (strncmp(buf, "ordered", 7) == 0)
621 tag_type = MSG_ORDERED_TAG;
622 else if (strncmp(buf, "simple", 6) == 0)
623 tag_type = MSG_SIMPLE_TAG;
624 else if (strncmp(buf, "none", 4) != 0)
627 if (tag_type == prev_tag_type)
630 retval = sht->change_queue_type(sdev, tag_type);
637 static struct device_attribute sdev_attr_queue_type_rw =
638 __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field,
639 sdev_store_queue_type_rw);
641 static struct device_attribute *attr_changed_internally(
642 struct Scsi_Host *shost,
643 struct device_attribute * attr)
645 if (!strcmp("queue_depth", attr->attr.name)
646 && shost->hostt->change_queue_depth)
647 return &sdev_attr_queue_depth_rw;
648 else if (!strcmp("queue_type", attr->attr.name)
649 && shost->hostt->change_queue_type)
650 return &sdev_attr_queue_type_rw;
655 static struct device_attribute *attr_overridden(
656 struct device_attribute **attrs,
657 struct device_attribute *attr)
663 for (i = 0; attrs[i]; i++)
664 if (!strcmp(attrs[i]->attr.name, attr->attr.name))
669 static int attr_add(struct device *dev, struct device_attribute *attr)
671 struct device_attribute *base_attr;
674 * Spare the caller from having to copy things it's not interested in.
676 base_attr = attr_overridden(scsi_sysfs_sdev_attrs, attr);
678 /* extend permissions */
679 attr->attr.mode |= base_attr->attr.mode;
681 /* override null show/store with default */
683 attr->show = base_attr->show;
685 attr->store = base_attr->store;
688 return device_create_file(dev, attr);
692 * scsi_sysfs_add_sdev - add scsi device to sysfs
693 * @sdev: scsi_device to add
696 * 0 on Success / non-zero on Failure
698 int scsi_sysfs_add_sdev(struct scsi_device *sdev)
702 if ((error = scsi_device_set_state(sdev, SDEV_RUNNING)) != 0)
705 error = device_add(&sdev->sdev_gendev);
707 put_device(sdev->sdev_gendev.parent);
708 printk(KERN_INFO "error 1\n");
711 error = class_device_add(&sdev->sdev_classdev);
713 printk(KERN_INFO "error 2\n");
717 /* take a reference for the sdev_classdev; this is
718 * released by the sdev_class .release */
719 get_device(&sdev->sdev_gendev);
720 if (sdev->host->hostt->sdev_attrs) {
721 for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) {
722 error = attr_add(&sdev->sdev_gendev,
723 sdev->host->hostt->sdev_attrs[i]);
725 __scsi_remove_device(sdev);
731 for (i = 0; scsi_sysfs_sdev_attrs[i]; i++) {
732 if (!attr_overridden(sdev->host->hostt->sdev_attrs,
733 scsi_sysfs_sdev_attrs[i])) {
734 struct device_attribute * attr =
735 attr_changed_internally(sdev->host,
736 scsi_sysfs_sdev_attrs[i]);
737 error = device_create_file(&sdev->sdev_gendev, attr);
739 __scsi_remove_device(sdev);
745 transport_add_device(&sdev->sdev_gendev);
750 scsi_device_set_state(sdev, SDEV_CANCEL);
752 device_del(&sdev->sdev_gendev);
753 transport_destroy_device(&sdev->sdev_gendev);
754 put_device(&sdev->sdev_gendev);
759 void __scsi_remove_device(struct scsi_device *sdev)
761 struct device *dev = &sdev->sdev_gendev;
763 if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0)
766 class_device_unregister(&sdev->sdev_classdev);
767 transport_remove_device(dev);
769 scsi_device_set_state(sdev, SDEV_DEL);
770 if (sdev->host->hostt->slave_destroy)
771 sdev->host->hostt->slave_destroy(sdev);
772 transport_destroy_device(dev);
777 * scsi_remove_device - unregister a device from the scsi bus
778 * @sdev: scsi_device to unregister
780 void scsi_remove_device(struct scsi_device *sdev)
782 struct Scsi_Host *shost = sdev->host;
784 mutex_lock(&shost->scan_mutex);
785 __scsi_remove_device(sdev);
786 mutex_unlock(&shost->scan_mutex);
788 EXPORT_SYMBOL(scsi_remove_device);
790 void __scsi_remove_target(struct scsi_target *starget)
792 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
794 struct scsi_device *sdev;
796 spin_lock_irqsave(shost->host_lock, flags);
799 list_for_each_entry(sdev, &shost->__devices, siblings) {
800 if (sdev->channel != starget->channel ||
801 sdev->id != starget->id ||
802 sdev->sdev_state == SDEV_DEL)
804 spin_unlock_irqrestore(shost->host_lock, flags);
805 scsi_remove_device(sdev);
806 spin_lock_irqsave(shost->host_lock, flags);
809 spin_unlock_irqrestore(shost->host_lock, flags);
810 scsi_target_reap(starget);
813 static int __remove_child (struct device * dev, void * data)
815 if (scsi_is_target_device(dev))
816 __scsi_remove_target(to_scsi_target(dev));
821 * scsi_remove_target - try to remove a target and all its devices
822 * @dev: generic starget or parent of generic stargets to be removed
824 * Note: This is slightly racy. It is possible that if the user
825 * requests the addition of another device then the target won't be
828 void scsi_remove_target(struct device *dev)
832 if (scsi_is_target_device(dev)) {
833 __scsi_remove_target(to_scsi_target(dev));
837 rdev = get_device(dev);
838 device_for_each_child(dev, NULL, __remove_child);
841 EXPORT_SYMBOL(scsi_remove_target);
843 int scsi_register_driver(struct device_driver *drv)
845 drv->bus = &scsi_bus_type;
847 return driver_register(drv);
849 EXPORT_SYMBOL(scsi_register_driver);
851 int scsi_register_interface(struct class_interface *intf)
853 intf->class = &sdev_class;
855 return class_interface_register(intf);
857 EXPORT_SYMBOL(scsi_register_interface);
860 static struct class_device_attribute *class_attr_overridden(
861 struct class_device_attribute **attrs,
862 struct class_device_attribute *attr)
868 for (i = 0; attrs[i]; i++)
869 if (!strcmp(attrs[i]->attr.name, attr->attr.name))
874 static int class_attr_add(struct class_device *classdev,
875 struct class_device_attribute *attr)
877 struct class_device_attribute *base_attr;
880 * Spare the caller from having to copy things it's not interested in.
882 base_attr = class_attr_overridden(scsi_sysfs_shost_attrs, attr);
884 /* extend permissions */
885 attr->attr.mode |= base_attr->attr.mode;
887 /* override null show/store with default */
889 attr->show = base_attr->show;
891 attr->store = base_attr->store;
894 return class_device_create_file(classdev, attr);
898 * scsi_sysfs_add_host - add scsi host to subsystem
899 * @shost: scsi host struct to add to subsystem
900 * @dev: parent struct device pointer
902 int scsi_sysfs_add_host(struct Scsi_Host *shost)
906 if (shost->hostt->shost_attrs) {
907 for (i = 0; shost->hostt->shost_attrs[i]; i++) {
908 error = class_attr_add(&shost->shost_classdev,
909 shost->hostt->shost_attrs[i]);
915 for (i = 0; scsi_sysfs_shost_attrs[i]; i++) {
916 if (!class_attr_overridden(shost->hostt->shost_attrs,
917 scsi_sysfs_shost_attrs[i])) {
918 error = class_device_create_file(&shost->shost_classdev,
919 scsi_sysfs_shost_attrs[i]);
925 transport_register_device(&shost->shost_gendev);
929 void scsi_sysfs_device_initialize(struct scsi_device *sdev)
932 struct Scsi_Host *shost = sdev->host;
933 struct scsi_target *starget = sdev->sdev_target;
935 device_initialize(&sdev->sdev_gendev);
936 sdev->sdev_gendev.bus = &scsi_bus_type;
937 sdev->sdev_gendev.release = scsi_device_dev_release;
938 sprintf(sdev->sdev_gendev.bus_id,"%d:%d:%d:%d",
939 sdev->host->host_no, sdev->channel, sdev->id,
942 class_device_initialize(&sdev->sdev_classdev);
943 sdev->sdev_classdev.dev = &sdev->sdev_gendev;
944 sdev->sdev_classdev.class = &sdev_class;
945 snprintf(sdev->sdev_classdev.class_id, BUS_ID_SIZE,
946 "%d:%d:%d:%d", sdev->host->host_no,
947 sdev->channel, sdev->id, sdev->lun);
948 sdev->scsi_level = starget->scsi_level;
949 transport_setup_device(&sdev->sdev_gendev);
950 spin_lock_irqsave(shost->host_lock, flags);
951 list_add_tail(&sdev->same_target_siblings, &starget->devices);
952 list_add_tail(&sdev->siblings, &shost->__devices);
953 spin_unlock_irqrestore(shost->host_lock, flags);
956 int scsi_is_sdev_device(const struct device *dev)
958 return dev->release == scsi_device_dev_release;
960 EXPORT_SYMBOL(scsi_is_sdev_device);
962 /* A blank transport template that is used in drivers that don't
963 * yet implement Transport Attributes */
964 struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, };