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 /* NULL queue means the device can't be used */
322 sdev->request_queue = NULL;
324 scsi_target_reap(scsi_target(sdev));
326 kfree(sdev->inquiry);
333 static void scsi_device_dev_release(struct device *dev)
335 struct scsi_device *sdp = to_scsi_device(dev);
336 execute_in_process_context(scsi_device_dev_release_usercontext,
340 static struct class sdev_class = {
341 .name = "scsi_device",
342 .dev_release = scsi_device_cls_release,
345 /* all probing is done in the individual ->probe routines */
346 static int scsi_bus_match(struct device *dev, struct device_driver *gendrv)
348 struct scsi_device *sdp;
350 if (dev->type != &scsi_dev_type)
353 sdp = to_scsi_device(dev);
354 if (sdp->no_uld_attach)
356 return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0;
359 static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
361 struct scsi_device *sdev;
363 if (dev->type != &scsi_dev_type)
366 sdev = to_scsi_device(dev);
368 add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type);
372 static int scsi_bus_suspend(struct device * dev, pm_message_t state)
374 struct device_driver *drv;
375 struct scsi_device *sdev;
378 if (dev->type != &scsi_dev_type)
382 sdev = to_scsi_device(dev);
384 err = scsi_device_quiesce(sdev);
388 if (drv && drv->suspend) {
389 err = drv->suspend(dev, state);
397 static int scsi_bus_resume(struct device * dev)
399 struct device_driver *drv;
400 struct scsi_device *sdev;
403 if (dev->type != &scsi_dev_type)
407 sdev = to_scsi_device(dev);
409 if (drv && drv->resume)
410 err = drv->resume(dev);
412 scsi_device_resume(sdev);
417 struct bus_type scsi_bus_type = {
419 .match = scsi_bus_match,
420 .uevent = scsi_bus_uevent,
421 .suspend = scsi_bus_suspend,
422 .resume = scsi_bus_resume,
424 EXPORT_SYMBOL_GPL(scsi_bus_type);
426 int scsi_sysfs_register(void)
430 error = bus_register(&scsi_bus_type);
432 error = class_register(&sdev_class);
434 bus_unregister(&scsi_bus_type);
440 void scsi_sysfs_unregister(void)
442 class_unregister(&sdev_class);
443 bus_unregister(&scsi_bus_type);
447 * sdev_show_function: macro to create an attr function that can be used to
448 * show a non-bit field.
450 #define sdev_show_function(field, format_string) \
452 sdev_show_##field (struct device *dev, struct device_attribute *attr, \
455 struct scsi_device *sdev; \
456 sdev = to_scsi_device(dev); \
457 return snprintf (buf, 20, format_string, sdev->field); \
461 * sdev_rd_attr: macro to create a function and attribute variable for a
464 #define sdev_rd_attr(field, format_string) \
465 sdev_show_function(field, format_string) \
466 static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL);
470 * sdev_rd_attr: create a function and attribute variable for a
473 #define sdev_rw_attr(field, format_string) \
474 sdev_show_function(field, format_string) \
477 sdev_store_##field (struct device *dev, struct device_attribute *attr, \
478 const char *buf, size_t count) \
480 struct scsi_device *sdev; \
481 sdev = to_scsi_device(dev); \
482 snscanf (buf, 20, format_string, &sdev->field); \
485 static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
487 /* Currently we don't export bit fields, but we might in future,
488 * so leave this code in */
491 * sdev_rd_attr: create a function and attribute variable for a
492 * read/write bit field.
494 #define sdev_rw_attr_bit(field) \
495 sdev_show_function(field, "%d\n") \
498 sdev_store_##field (struct device *dev, struct device_attribute *attr, \
499 const char *buf, size_t count) \
502 struct scsi_device *sdev; \
503 ret = scsi_sdev_check_buf_bit(buf); \
505 sdev = to_scsi_device(dev); \
511 static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
514 * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1",
515 * else return -EINVAL.
517 static int scsi_sdev_check_buf_bit(const char *buf)
519 if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
522 else if (buf[0] == '0')
531 * Create the actual show/store functions and data structures.
533 sdev_rd_attr (device_blocked, "%d\n");
534 sdev_rd_attr (queue_depth, "%d\n");
535 sdev_rd_attr (type, "%d\n");
536 sdev_rd_attr (scsi_level, "%d\n");
537 sdev_rd_attr (vendor, "%.8s\n");
538 sdev_rd_attr (model, "%.16s\n");
539 sdev_rd_attr (rev, "%.4s\n");
542 * TODO: can we make these symlinks to the block layer ones?
545 sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf)
547 struct scsi_device *sdev;
548 sdev = to_scsi_device(dev);
549 return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ);
553 sdev_store_timeout (struct device *dev, struct device_attribute *attr,
554 const char *buf, size_t count)
556 struct scsi_device *sdev;
558 sdev = to_scsi_device(dev);
559 sscanf (buf, "%d\n", &timeout);
560 blk_queue_rq_timeout(sdev->request_queue, timeout * HZ);
563 static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout);
566 store_rescan_field (struct device *dev, struct device_attribute *attr,
567 const char *buf, size_t count)
569 scsi_rescan_device(dev);
572 static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field);
574 static void sdev_store_delete_callback(struct device *dev)
576 scsi_remove_device(to_scsi_device(dev));
580 sdev_store_delete(struct device *dev, struct device_attribute *attr,
581 const char *buf, size_t count)
585 /* An attribute cannot be unregistered by one of its own methods,
586 * so we have to use this roundabout approach.
588 rc = device_schedule_callback(dev, sdev_store_delete_callback);
593 static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete);
596 store_state_field(struct device *dev, struct device_attribute *attr,
597 const char *buf, size_t count)
600 struct scsi_device *sdev = to_scsi_device(dev);
601 enum scsi_device_state state = 0;
603 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
604 const int len = strlen(sdev_states[i].name);
605 if (strncmp(sdev_states[i].name, buf, len) == 0 &&
607 state = sdev_states[i].value;
614 if (scsi_device_set_state(sdev, state))
620 show_state_field(struct device *dev, struct device_attribute *attr, char *buf)
622 struct scsi_device *sdev = to_scsi_device(dev);
623 const char *name = scsi_device_state_name(sdev->sdev_state);
628 return snprintf(buf, 20, "%s\n", name);
631 static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field);
634 show_queue_type_field(struct device *dev, struct device_attribute *attr,
637 struct scsi_device *sdev = to_scsi_device(dev);
638 const char *name = "none";
640 if (sdev->ordered_tags)
642 else if (sdev->simple_tags)
645 return snprintf(buf, 20, "%s\n", name);
648 static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL);
651 show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf)
653 return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8);
656 static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL);
658 #define show_sdev_iostat(field) \
660 show_iostat_##field(struct device *dev, struct device_attribute *attr, \
663 struct scsi_device *sdev = to_scsi_device(dev); \
664 unsigned long long count = atomic_read(&sdev->field); \
665 return snprintf(buf, 20, "0x%llx\n", count); \
667 static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL)
669 show_sdev_iostat(iorequest_cnt);
670 show_sdev_iostat(iodone_cnt);
671 show_sdev_iostat(ioerr_cnt);
674 sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
676 struct scsi_device *sdev;
677 sdev = to_scsi_device(dev);
678 return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type);
680 static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL);
682 #define DECLARE_EVT_SHOW(name, Cap_name) \
684 sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \
687 struct scsi_device *sdev = to_scsi_device(dev); \
688 int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\
689 return snprintf(buf, 20, "%d\n", val); \
692 #define DECLARE_EVT_STORE(name, Cap_name) \
694 sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\
695 const char *buf, size_t count) \
697 struct scsi_device *sdev = to_scsi_device(dev); \
698 int val = simple_strtoul(buf, NULL, 0); \
700 clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
702 set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
708 #define DECLARE_EVT(name, Cap_name) \
709 DECLARE_EVT_SHOW(name, Cap_name) \
710 DECLARE_EVT_STORE(name, Cap_name) \
711 static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \
712 sdev_store_evt_##name);
713 #define REF_EVT(name) &dev_attr_evt_##name.attr
715 DECLARE_EVT(media_change, MEDIA_CHANGE)
717 /* Default template for device attributes. May NOT be modified */
718 static struct attribute *scsi_sdev_attrs[] = {
719 &dev_attr_device_blocked.attr,
721 &dev_attr_scsi_level.attr,
722 &dev_attr_vendor.attr,
723 &dev_attr_model.attr,
725 &dev_attr_rescan.attr,
726 &dev_attr_delete.attr,
727 &dev_attr_state.attr,
728 &dev_attr_timeout.attr,
729 &dev_attr_iocounterbits.attr,
730 &dev_attr_iorequest_cnt.attr,
731 &dev_attr_iodone_cnt.attr,
732 &dev_attr_ioerr_cnt.attr,
733 &dev_attr_modalias.attr,
734 REF_EVT(media_change),
738 static struct attribute_group scsi_sdev_attr_group = {
739 .attrs = scsi_sdev_attrs,
742 static const struct attribute_group *scsi_sdev_attr_groups[] = {
743 &scsi_sdev_attr_group,
748 sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr,
749 const char *buf, size_t count)
752 struct scsi_device *sdev = to_scsi_device(dev);
753 struct scsi_host_template *sht = sdev->host->hostt;
755 if (!sht->change_queue_depth)
758 depth = simple_strtoul(buf, NULL, 0);
763 retval = sht->change_queue_depth(sdev, depth);
770 static struct device_attribute sdev_attr_queue_depth_rw =
771 __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth,
772 sdev_store_queue_depth_rw);
775 sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr,
776 const char *buf, size_t count)
778 struct scsi_device *sdev = to_scsi_device(dev);
779 struct scsi_host_template *sht = sdev->host->hostt;
780 int tag_type = 0, retval;
781 int prev_tag_type = scsi_get_tag_type(sdev);
783 if (!sdev->tagged_supported || !sht->change_queue_type)
786 if (strncmp(buf, "ordered", 7) == 0)
787 tag_type = MSG_ORDERED_TAG;
788 else if (strncmp(buf, "simple", 6) == 0)
789 tag_type = MSG_SIMPLE_TAG;
790 else if (strncmp(buf, "none", 4) != 0)
793 if (tag_type == prev_tag_type)
796 retval = sht->change_queue_type(sdev, tag_type);
803 static int scsi_target_add(struct scsi_target *starget)
807 if (starget->state != STARGET_CREATED)
810 error = device_add(&starget->dev);
812 dev_err(&starget->dev, "target device_add failed, error %d\n", error);
813 get_device(&starget->dev);
814 scsi_target_reap(starget);
815 put_device(&starget->dev);
818 transport_add_device(&starget->dev);
819 starget->state = STARGET_RUNNING;
824 static struct device_attribute sdev_attr_queue_type_rw =
825 __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field,
826 sdev_store_queue_type_rw);
829 * scsi_sysfs_add_sdev - add scsi device to sysfs
830 * @sdev: scsi_device to add
833 * 0 on Success / non-zero on Failure
835 int scsi_sysfs_add_sdev(struct scsi_device *sdev)
838 struct request_queue *rq = sdev->request_queue;
839 struct scsi_target *starget = sdev->sdev_target;
841 if ((error = scsi_device_set_state(sdev, SDEV_RUNNING)) != 0)
844 error = scsi_target_add(starget);
848 transport_configure_device(&starget->dev);
849 error = device_add(&sdev->sdev_gendev);
851 printk(KERN_INFO "error 1\n");
854 error = device_add(&sdev->sdev_dev);
856 printk(KERN_INFO "error 2\n");
857 device_del(&sdev->sdev_gendev);
860 transport_add_device(&sdev->sdev_gendev);
861 sdev->is_visible = 1;
863 /* create queue files, which may be writable, depending on the host */
864 if (sdev->host->hostt->change_queue_depth)
865 error = device_create_file(&sdev->sdev_gendev, &sdev_attr_queue_depth_rw);
867 error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_depth);
871 if (sdev->host->hostt->change_queue_type)
872 error = device_create_file(&sdev->sdev_gendev, &sdev_attr_queue_type_rw);
874 error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_type);
878 error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL);
881 /* we're treating error on bsg register as non-fatal,
882 * so pretend nothing went wrong */
883 sdev_printk(KERN_INFO, sdev,
884 "Failed to register bsg queue, errno=%d\n", error);
886 /* add additional host specific attributes */
887 if (sdev->host->hostt->sdev_attrs) {
888 for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) {
889 error = device_create_file(&sdev->sdev_gendev,
890 sdev->host->hostt->sdev_attrs[i]);
899 __scsi_remove_device(sdev);
904 void __scsi_remove_device(struct scsi_device *sdev)
906 struct device *dev = &sdev->sdev_gendev;
908 if (sdev->is_visible) {
909 if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0)
912 bsg_unregister_queue(sdev->request_queue);
913 device_unregister(&sdev->sdev_dev);
914 transport_remove_device(dev);
917 put_device(&sdev->sdev_dev);
918 scsi_device_set_state(sdev, SDEV_DEL);
919 if (sdev->host->hostt->slave_destroy)
920 sdev->host->hostt->slave_destroy(sdev);
921 transport_destroy_device(dev);
923 /* cause the request function to reject all I/O requests */
924 sdev->request_queue->queuedata = NULL;
926 /* Freeing the queue signals to block that we're done */
927 scsi_free_queue(sdev->request_queue);
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 scsi_device_get(sdev))
959 spin_unlock_irqrestore(shost->host_lock, flags);
960 scsi_remove_device(sdev);
961 scsi_device_put(sdev);
962 spin_lock_irqsave(shost->host_lock, flags);
965 spin_unlock_irqrestore(shost->host_lock, flags);
966 scsi_target_reap(starget);
969 static int __remove_child (struct device * dev, void * data)
971 if (scsi_is_target_device(dev))
972 __scsi_remove_target(to_scsi_target(dev));
977 * scsi_remove_target - try to remove a target and all its devices
978 * @dev: generic starget or parent of generic stargets to be removed
980 * Note: This is slightly racy. It is possible that if the user
981 * requests the addition of another device then the target won't be
984 void scsi_remove_target(struct device *dev)
988 if (scsi_is_target_device(dev)) {
989 __scsi_remove_target(to_scsi_target(dev));
993 rdev = get_device(dev);
994 device_for_each_child(dev, NULL, __remove_child);
997 EXPORT_SYMBOL(scsi_remove_target);
999 int scsi_register_driver(struct device_driver *drv)
1001 drv->bus = &scsi_bus_type;
1003 return driver_register(drv);
1005 EXPORT_SYMBOL(scsi_register_driver);
1007 int scsi_register_interface(struct class_interface *intf)
1009 intf->class = &sdev_class;
1011 return class_interface_register(intf);
1013 EXPORT_SYMBOL(scsi_register_interface);
1016 * scsi_sysfs_add_host - add scsi host to subsystem
1017 * @shost: scsi host struct to add to subsystem
1019 int scsi_sysfs_add_host(struct Scsi_Host *shost)
1023 /* add host specific attributes */
1024 if (shost->hostt->shost_attrs) {
1025 for (i = 0; shost->hostt->shost_attrs[i]; i++) {
1026 error = device_create_file(&shost->shost_dev,
1027 shost->hostt->shost_attrs[i]);
1033 transport_register_device(&shost->shost_gendev);
1034 transport_configure_device(&shost->shost_gendev);
1038 static struct device_type scsi_dev_type = {
1039 .name = "scsi_device",
1040 .release = scsi_device_dev_release,
1041 .groups = scsi_sdev_attr_groups,
1044 void scsi_sysfs_device_initialize(struct scsi_device *sdev)
1046 unsigned long flags;
1047 struct Scsi_Host *shost = sdev->host;
1048 struct scsi_target *starget = sdev->sdev_target;
1050 device_initialize(&sdev->sdev_gendev);
1051 sdev->sdev_gendev.bus = &scsi_bus_type;
1052 sdev->sdev_gendev.type = &scsi_dev_type;
1053 dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%d",
1054 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1056 device_initialize(&sdev->sdev_dev);
1057 sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev);
1058 sdev->sdev_dev.class = &sdev_class;
1059 dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%d",
1060 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1061 sdev->scsi_level = starget->scsi_level;
1062 transport_setup_device(&sdev->sdev_gendev);
1063 spin_lock_irqsave(shost->host_lock, flags);
1064 list_add_tail(&sdev->same_target_siblings, &starget->devices);
1065 list_add_tail(&sdev->siblings, &shost->__devices);
1066 spin_unlock_irqrestore(shost->host_lock, flags);
1069 int scsi_is_sdev_device(const struct device *dev)
1071 return dev->type == &scsi_dev_type;
1073 EXPORT_SYMBOL(scsi_is_sdev_device);
1075 /* A blank transport template that is used in drivers that don't
1076 * yet implement Transport Attributes */
1077 struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, };