4 * SCSI sysfs interface routines.
6 * Created to pull SCSI mid layer sysfs routines into one file.
9 #include <linux/module.h>
10 #include <linux/slab.h>
11 #include <linux/init.h>
12 #include <linux/blkdev.h>
13 #include <linux/device.h>
14 #include <linux/pm_runtime.h>
16 #include <scsi/scsi.h>
17 #include <scsi/scsi_device.h>
18 #include <scsi/scsi_host.h>
19 #include <scsi/scsi_tcq.h>
20 #include <scsi/scsi_transport.h>
21 #include <scsi/scsi_driver.h>
23 #include "scsi_priv.h"
24 #include "scsi_logging.h"
26 static struct device_type scsi_dev_type;
29 enum scsi_device_state value;
32 { SDEV_CREATED, "created" },
33 { SDEV_RUNNING, "running" },
34 { SDEV_CANCEL, "cancel" },
35 { SDEV_DEL, "deleted" },
36 { SDEV_QUIESCE, "quiesce" },
37 { SDEV_OFFLINE, "offline" },
38 { SDEV_BLOCK, "blocked" },
39 { SDEV_CREATED_BLOCK, "created-blocked" },
42 const char *scsi_device_state_name(enum scsi_device_state state)
47 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
48 if (sdev_states[i].value == state) {
49 name = sdev_states[i].name;
57 enum scsi_host_state value;
60 { SHOST_CREATED, "created" },
61 { SHOST_RUNNING, "running" },
62 { SHOST_CANCEL, "cancel" },
63 { SHOST_DEL, "deleted" },
64 { SHOST_RECOVERY, "recovery" },
65 { SHOST_CANCEL_RECOVERY, "cancel/recovery" },
66 { SHOST_DEL_RECOVERY, "deleted/recovery", },
68 const char *scsi_host_state_name(enum scsi_host_state state)
73 for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
74 if (shost_states[i].value == state) {
75 name = shost_states[i].name;
82 static int check_set(unsigned int *val, char *src)
86 if (strncmp(src, "-", 20) == 0) {
87 *val = SCAN_WILD_CARD;
90 * Doesn't check for int overflow
92 *val = simple_strtoul(src, &last, 0);
99 static int scsi_scan(struct Scsi_Host *shost, const char *str)
101 char s1[15], s2[15], s3[15], junk;
102 unsigned int channel, id, lun;
105 res = sscanf(str, "%10s %10s %10s %c", s1, s2, s3, &junk);
108 if (check_set(&channel, s1))
110 if (check_set(&id, s2))
112 if (check_set(&lun, s3))
114 if (shost->transportt->user_scan)
115 res = shost->transportt->user_scan(shost, channel, id, lun);
117 res = scsi_scan_host_selected(shost, channel, id, lun, 1);
122 * shost_show_function: macro to create an attr function that can be used to
123 * show a non-bit field.
125 #define shost_show_function(name, field, format_string) \
127 show_##name (struct device *dev, struct device_attribute *attr, \
130 struct Scsi_Host *shost = class_to_shost(dev); \
131 return snprintf (buf, 20, format_string, shost->field); \
135 * shost_rd_attr: macro to create a function and attribute variable for a
138 #define shost_rd_attr2(name, field, format_string) \
139 shost_show_function(name, field, format_string) \
140 static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
142 #define shost_rd_attr(field, format_string) \
143 shost_rd_attr2(field, field, format_string)
146 * Create the actual show/store functions and data structures.
150 store_scan(struct device *dev, struct device_attribute *attr,
151 const char *buf, size_t count)
153 struct Scsi_Host *shost = class_to_shost(dev);
156 res = scsi_scan(shost, buf);
161 static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan);
164 store_shost_state(struct device *dev, struct device_attribute *attr,
165 const char *buf, size_t count)
168 struct Scsi_Host *shost = class_to_shost(dev);
169 enum scsi_host_state state = 0;
171 for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
172 const int len = strlen(shost_states[i].name);
173 if (strncmp(shost_states[i].name, buf, len) == 0 &&
175 state = shost_states[i].value;
182 if (scsi_host_set_state(shost, state))
188 show_shost_state(struct device *dev, struct device_attribute *attr, char *buf)
190 struct Scsi_Host *shost = class_to_shost(dev);
191 const char *name = scsi_host_state_name(shost->shost_state);
196 return snprintf(buf, 20, "%s\n", name);
199 /* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */
200 struct device_attribute dev_attr_hstate =
201 __ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state);
204 show_shost_mode(unsigned int mode, char *buf)
208 if (mode & MODE_INITIATOR)
209 len = sprintf(buf, "%s", "Initiator");
211 if (mode & MODE_TARGET)
212 len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target");
214 len += sprintf(buf + len, "\n");
220 show_shost_supported_mode(struct device *dev, struct device_attribute *attr,
223 struct Scsi_Host *shost = class_to_shost(dev);
224 unsigned int supported_mode = shost->hostt->supported_mode;
226 if (supported_mode == MODE_UNKNOWN)
227 /* by default this should be initiator */
228 supported_mode = MODE_INITIATOR;
230 return show_shost_mode(supported_mode, buf);
233 static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL);
236 show_shost_active_mode(struct device *dev,
237 struct device_attribute *attr, char *buf)
239 struct Scsi_Host *shost = class_to_shost(dev);
241 if (shost->active_mode == MODE_UNKNOWN)
242 return snprintf(buf, 20, "unknown\n");
244 return show_shost_mode(shost->active_mode, buf);
247 static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL);
249 shost_rd_attr(unique_id, "%u\n");
250 shost_rd_attr(host_busy, "%hu\n");
251 shost_rd_attr(cmd_per_lun, "%hd\n");
252 shost_rd_attr(can_queue, "%hd\n");
253 shost_rd_attr(sg_tablesize, "%hu\n");
254 shost_rd_attr(sg_prot_tablesize, "%hu\n");
255 shost_rd_attr(unchecked_isa_dma, "%d\n");
256 shost_rd_attr(prot_capabilities, "%u\n");
257 shost_rd_attr(prot_guard_type, "%hd\n");
258 shost_rd_attr2(proc_name, hostt->proc_name, "%s\n");
260 static struct attribute *scsi_sysfs_shost_attrs[] = {
261 &dev_attr_unique_id.attr,
262 &dev_attr_host_busy.attr,
263 &dev_attr_cmd_per_lun.attr,
264 &dev_attr_can_queue.attr,
265 &dev_attr_sg_tablesize.attr,
266 &dev_attr_sg_prot_tablesize.attr,
267 &dev_attr_unchecked_isa_dma.attr,
268 &dev_attr_proc_name.attr,
270 &dev_attr_hstate.attr,
271 &dev_attr_supported_mode.attr,
272 &dev_attr_active_mode.attr,
273 &dev_attr_prot_capabilities.attr,
274 &dev_attr_prot_guard_type.attr,
278 struct attribute_group scsi_shost_attr_group = {
279 .attrs = scsi_sysfs_shost_attrs,
282 const struct attribute_group *scsi_sysfs_shost_attr_groups[] = {
283 &scsi_shost_attr_group,
287 static void scsi_device_cls_release(struct device *class_dev)
289 struct scsi_device *sdev;
291 sdev = class_to_sdev(class_dev);
292 put_device(&sdev->sdev_gendev);
295 static void scsi_device_dev_release_usercontext(struct work_struct *work)
297 struct scsi_device *sdev;
298 struct device *parent;
299 struct scsi_target *starget;
300 struct list_head *this, *tmp;
303 sdev = container_of(work, struct scsi_device, ew.work);
305 parent = sdev->sdev_gendev.parent;
306 starget = to_scsi_target(parent);
308 spin_lock_irqsave(sdev->host->host_lock, flags);
310 list_del(&sdev->siblings);
311 list_del(&sdev->same_target_siblings);
312 list_del(&sdev->starved_entry);
313 spin_unlock_irqrestore(sdev->host->host_lock, flags);
315 cancel_work_sync(&sdev->event_work);
317 list_for_each_safe(this, tmp, &sdev->event_list) {
318 struct scsi_event *evt;
320 evt = list_entry(this, struct scsi_event, node);
321 list_del(&evt->node);
325 blk_put_queue(sdev->request_queue);
326 /* NULL queue means the device can't be used */
327 sdev->request_queue = NULL;
329 scsi_target_reap(scsi_target(sdev));
331 kfree(sdev->inquiry);
338 static void scsi_device_dev_release(struct device *dev)
340 struct scsi_device *sdp = to_scsi_device(dev);
341 execute_in_process_context(scsi_device_dev_release_usercontext,
345 static struct class sdev_class = {
346 .name = "scsi_device",
347 .dev_release = scsi_device_cls_release,
350 /* all probing is done in the individual ->probe routines */
351 static int scsi_bus_match(struct device *dev, struct device_driver *gendrv)
353 struct scsi_device *sdp;
355 if (dev->type != &scsi_dev_type)
358 sdp = to_scsi_device(dev);
359 if (sdp->no_uld_attach)
361 return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0;
364 static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
366 struct scsi_device *sdev;
368 if (dev->type != &scsi_dev_type)
371 sdev = to_scsi_device(dev);
373 add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type);
377 struct bus_type scsi_bus_type = {
379 .match = scsi_bus_match,
380 .uevent = scsi_bus_uevent,
382 .pm = &scsi_bus_pm_ops,
385 EXPORT_SYMBOL_GPL(scsi_bus_type);
387 int scsi_sysfs_register(void)
391 error = bus_register(&scsi_bus_type);
393 error = class_register(&sdev_class);
395 bus_unregister(&scsi_bus_type);
401 void scsi_sysfs_unregister(void)
403 class_unregister(&sdev_class);
404 bus_unregister(&scsi_bus_type);
408 * sdev_show_function: macro to create an attr function that can be used to
409 * show a non-bit field.
411 #define sdev_show_function(field, format_string) \
413 sdev_show_##field (struct device *dev, struct device_attribute *attr, \
416 struct scsi_device *sdev; \
417 sdev = to_scsi_device(dev); \
418 return snprintf (buf, 20, format_string, sdev->field); \
422 * sdev_rd_attr: macro to create a function and attribute variable for a
425 #define sdev_rd_attr(field, format_string) \
426 sdev_show_function(field, format_string) \
427 static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL);
431 * sdev_rw_attr: create a function and attribute variable for a
434 #define sdev_rw_attr(field, format_string) \
435 sdev_show_function(field, format_string) \
438 sdev_store_##field (struct device *dev, struct device_attribute *attr, \
439 const char *buf, size_t count) \
441 struct scsi_device *sdev; \
442 sdev = to_scsi_device(dev); \
443 sscanf (buf, format_string, &sdev->field); \
446 static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
448 /* Currently we don't export bit fields, but we might in future,
449 * so leave this code in */
452 * sdev_rd_attr: create a function and attribute variable for a
453 * read/write bit field.
455 #define sdev_rw_attr_bit(field) \
456 sdev_show_function(field, "%d\n") \
459 sdev_store_##field (struct device *dev, struct device_attribute *attr, \
460 const char *buf, size_t count) \
463 struct scsi_device *sdev; \
464 ret = scsi_sdev_check_buf_bit(buf); \
466 sdev = to_scsi_device(dev); \
472 static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
475 * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1",
476 * else return -EINVAL.
478 static int scsi_sdev_check_buf_bit(const char *buf)
480 if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
483 else if (buf[0] == '0')
492 * Create the actual show/store functions and data structures.
494 sdev_rd_attr (device_blocked, "%d\n");
495 sdev_rd_attr (queue_depth, "%d\n");
496 sdev_rd_attr (type, "%d\n");
497 sdev_rd_attr (scsi_level, "%d\n");
498 sdev_rd_attr (vendor, "%.8s\n");
499 sdev_rd_attr (model, "%.16s\n");
500 sdev_rd_attr (rev, "%.4s\n");
503 * TODO: can we make these symlinks to the block layer ones?
506 sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf)
508 struct scsi_device *sdev;
509 sdev = to_scsi_device(dev);
510 return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ);
514 sdev_store_timeout (struct device *dev, struct device_attribute *attr,
515 const char *buf, size_t count)
517 struct scsi_device *sdev;
519 sdev = to_scsi_device(dev);
520 sscanf (buf, "%d\n", &timeout);
521 blk_queue_rq_timeout(sdev->request_queue, timeout * HZ);
524 static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout);
527 store_rescan_field (struct device *dev, struct device_attribute *attr,
528 const char *buf, size_t count)
530 scsi_rescan_device(dev);
533 static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field);
535 static void sdev_store_delete_callback(struct device *dev)
537 scsi_remove_device(to_scsi_device(dev));
541 sdev_store_delete(struct device *dev, struct device_attribute *attr,
542 const char *buf, size_t count)
546 /* An attribute cannot be unregistered by one of its own methods,
547 * so we have to use this roundabout approach.
549 rc = device_schedule_callback(dev, sdev_store_delete_callback);
554 static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete);
557 store_state_field(struct device *dev, struct device_attribute *attr,
558 const char *buf, size_t count)
561 struct scsi_device *sdev = to_scsi_device(dev);
562 enum scsi_device_state state = 0;
564 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
565 const int len = strlen(sdev_states[i].name);
566 if (strncmp(sdev_states[i].name, buf, len) == 0 &&
568 state = sdev_states[i].value;
575 if (scsi_device_set_state(sdev, state))
581 show_state_field(struct device *dev, struct device_attribute *attr, char *buf)
583 struct scsi_device *sdev = to_scsi_device(dev);
584 const char *name = scsi_device_state_name(sdev->sdev_state);
589 return snprintf(buf, 20, "%s\n", name);
592 static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field);
595 show_queue_type_field(struct device *dev, struct device_attribute *attr,
598 struct scsi_device *sdev = to_scsi_device(dev);
599 const char *name = "none";
601 if (sdev->ordered_tags)
603 else if (sdev->simple_tags)
606 return snprintf(buf, 20, "%s\n", name);
609 static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL);
612 show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf)
614 return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8);
617 static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL);
619 #define show_sdev_iostat(field) \
621 show_iostat_##field(struct device *dev, struct device_attribute *attr, \
624 struct scsi_device *sdev = to_scsi_device(dev); \
625 unsigned long long count = atomic_read(&sdev->field); \
626 return snprintf(buf, 20, "0x%llx\n", count); \
628 static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL)
630 show_sdev_iostat(iorequest_cnt);
631 show_sdev_iostat(iodone_cnt);
632 show_sdev_iostat(ioerr_cnt);
635 sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
637 struct scsi_device *sdev;
638 sdev = to_scsi_device(dev);
639 return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type);
641 static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL);
643 #define DECLARE_EVT_SHOW(name, Cap_name) \
645 sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \
648 struct scsi_device *sdev = to_scsi_device(dev); \
649 int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\
650 return snprintf(buf, 20, "%d\n", val); \
653 #define DECLARE_EVT_STORE(name, Cap_name) \
655 sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\
656 const char *buf, size_t count) \
658 struct scsi_device *sdev = to_scsi_device(dev); \
659 int val = simple_strtoul(buf, NULL, 0); \
661 clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
663 set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
669 #define DECLARE_EVT(name, Cap_name) \
670 DECLARE_EVT_SHOW(name, Cap_name) \
671 DECLARE_EVT_STORE(name, Cap_name) \
672 static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \
673 sdev_store_evt_##name);
674 #define REF_EVT(name) &dev_attr_evt_##name.attr
676 DECLARE_EVT(media_change, MEDIA_CHANGE)
678 /* Default template for device attributes. May NOT be modified */
679 static struct attribute *scsi_sdev_attrs[] = {
680 &dev_attr_device_blocked.attr,
682 &dev_attr_scsi_level.attr,
683 &dev_attr_vendor.attr,
684 &dev_attr_model.attr,
686 &dev_attr_rescan.attr,
687 &dev_attr_delete.attr,
688 &dev_attr_state.attr,
689 &dev_attr_timeout.attr,
690 &dev_attr_iocounterbits.attr,
691 &dev_attr_iorequest_cnt.attr,
692 &dev_attr_iodone_cnt.attr,
693 &dev_attr_ioerr_cnt.attr,
694 &dev_attr_modalias.attr,
695 REF_EVT(media_change),
699 static struct attribute_group scsi_sdev_attr_group = {
700 .attrs = scsi_sdev_attrs,
703 static const struct attribute_group *scsi_sdev_attr_groups[] = {
704 &scsi_sdev_attr_group,
709 sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr,
710 const char *buf, size_t count)
713 struct scsi_device *sdev = to_scsi_device(dev);
714 struct scsi_host_template *sht = sdev->host->hostt;
716 if (!sht->change_queue_depth)
719 depth = simple_strtoul(buf, NULL, 0);
724 retval = sht->change_queue_depth(sdev, depth,
725 SCSI_QDEPTH_DEFAULT);
729 sdev->max_queue_depth = sdev->queue_depth;
734 static struct device_attribute sdev_attr_queue_depth_rw =
735 __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth,
736 sdev_store_queue_depth_rw);
739 sdev_show_queue_ramp_up_period(struct device *dev,
740 struct device_attribute *attr,
743 struct scsi_device *sdev;
744 sdev = to_scsi_device(dev);
745 return snprintf(buf, 20, "%u\n",
746 jiffies_to_msecs(sdev->queue_ramp_up_period));
750 sdev_store_queue_ramp_up_period(struct device *dev,
751 struct device_attribute *attr,
752 const char *buf, size_t count)
754 struct scsi_device *sdev = to_scsi_device(dev);
755 unsigned long period;
757 if (strict_strtoul(buf, 10, &period))
760 sdev->queue_ramp_up_period = msecs_to_jiffies(period);
764 static struct device_attribute sdev_attr_queue_ramp_up_period =
765 __ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR,
766 sdev_show_queue_ramp_up_period,
767 sdev_store_queue_ramp_up_period);
770 sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr,
771 const char *buf, size_t count)
773 struct scsi_device *sdev = to_scsi_device(dev);
774 struct scsi_host_template *sht = sdev->host->hostt;
775 int tag_type = 0, retval;
776 int prev_tag_type = scsi_get_tag_type(sdev);
778 if (!sdev->tagged_supported || !sht->change_queue_type)
781 if (strncmp(buf, "ordered", 7) == 0)
782 tag_type = MSG_ORDERED_TAG;
783 else if (strncmp(buf, "simple", 6) == 0)
784 tag_type = MSG_SIMPLE_TAG;
785 else if (strncmp(buf, "none", 4) != 0)
788 if (tag_type == prev_tag_type)
791 retval = sht->change_queue_type(sdev, tag_type);
798 static int scsi_target_add(struct scsi_target *starget)
802 if (starget->state != STARGET_CREATED)
805 error = device_add(&starget->dev);
807 dev_err(&starget->dev, "target device_add failed, error %d\n", error);
810 transport_add_device(&starget->dev);
811 starget->state = STARGET_RUNNING;
813 pm_runtime_set_active(&starget->dev);
814 pm_runtime_enable(&starget->dev);
815 device_enable_async_suspend(&starget->dev);
820 static struct device_attribute sdev_attr_queue_type_rw =
821 __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field,
822 sdev_store_queue_type_rw);
825 * scsi_sysfs_add_sdev - add scsi device to sysfs
826 * @sdev: scsi_device to add
829 * 0 on Success / non-zero on Failure
831 int scsi_sysfs_add_sdev(struct scsi_device *sdev)
834 struct request_queue *rq = sdev->request_queue;
835 struct scsi_target *starget = sdev->sdev_target;
837 error = scsi_device_set_state(sdev, SDEV_RUNNING);
841 error = scsi_target_add(starget);
845 transport_configure_device(&starget->dev);
847 device_enable_async_suspend(&sdev->sdev_gendev);
848 scsi_autopm_get_target(starget);
849 pm_runtime_set_active(&sdev->sdev_gendev);
850 pm_runtime_forbid(&sdev->sdev_gendev);
851 pm_runtime_enable(&sdev->sdev_gendev);
852 scsi_autopm_put_target(starget);
854 /* The following call will keep sdev active indefinitely, until
855 * its driver does a corresponding scsi_autopm_pm_device(). Only
856 * drivers supporting autosuspend will do this.
858 scsi_autopm_get_device(sdev);
860 error = device_add(&sdev->sdev_gendev);
862 sdev_printk(KERN_INFO, sdev,
863 "failed to add device: %d\n", error);
866 device_enable_async_suspend(&sdev->sdev_dev);
867 error = device_add(&sdev->sdev_dev);
869 sdev_printk(KERN_INFO, sdev,
870 "failed to add class device: %d\n", error);
871 device_del(&sdev->sdev_gendev);
874 transport_add_device(&sdev->sdev_gendev);
875 sdev->is_visible = 1;
877 /* create queue files, which may be writable, depending on the host */
878 if (sdev->host->hostt->change_queue_depth) {
879 error = device_create_file(&sdev->sdev_gendev,
880 &sdev_attr_queue_depth_rw);
881 error = device_create_file(&sdev->sdev_gendev,
882 &sdev_attr_queue_ramp_up_period);
885 error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_depth);
889 if (sdev->host->hostt->change_queue_type)
890 error = device_create_file(&sdev->sdev_gendev, &sdev_attr_queue_type_rw);
892 error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_type);
896 error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL);
899 /* we're treating error on bsg register as non-fatal,
900 * so pretend nothing went wrong */
901 sdev_printk(KERN_INFO, sdev,
902 "Failed to register bsg queue, errno=%d\n", error);
904 /* add additional host specific attributes */
905 if (sdev->host->hostt->sdev_attrs) {
906 for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) {
907 error = device_create_file(&sdev->sdev_gendev,
908 sdev->host->hostt->sdev_attrs[i]);
917 void __scsi_remove_device(struct scsi_device *sdev)
919 struct device *dev = &sdev->sdev_gendev;
921 if (sdev->is_visible) {
922 if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0)
925 bsg_unregister_queue(sdev->request_queue);
926 device_unregister(&sdev->sdev_dev);
927 transport_remove_device(dev);
930 put_device(&sdev->sdev_dev);
931 scsi_device_set_state(sdev, SDEV_DEL);
932 if (sdev->host->hostt->slave_destroy)
933 sdev->host->hostt->slave_destroy(sdev);
934 transport_destroy_device(dev);
936 /* cause the request function to reject all I/O requests */
937 sdev->request_queue->queuedata = NULL;
939 /* Freeing the queue signals to block that we're done */
940 scsi_free_queue(sdev->request_queue);
945 * scsi_remove_device - unregister a device from the scsi bus
946 * @sdev: scsi_device to unregister
948 void scsi_remove_device(struct scsi_device *sdev)
950 struct Scsi_Host *shost = sdev->host;
952 mutex_lock(&shost->scan_mutex);
953 __scsi_remove_device(sdev);
954 mutex_unlock(&shost->scan_mutex);
956 EXPORT_SYMBOL(scsi_remove_device);
958 static void __scsi_remove_target(struct scsi_target *starget)
960 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
962 struct scsi_device *sdev;
964 spin_lock_irqsave(shost->host_lock, flags);
967 list_for_each_entry(sdev, &shost->__devices, siblings) {
968 if (sdev->channel != starget->channel ||
969 sdev->id != starget->id ||
970 scsi_device_get(sdev))
972 spin_unlock_irqrestore(shost->host_lock, flags);
973 scsi_remove_device(sdev);
974 scsi_device_put(sdev);
975 spin_lock_irqsave(shost->host_lock, flags);
978 spin_unlock_irqrestore(shost->host_lock, flags);
979 scsi_target_reap(starget);
982 static int __remove_child (struct device * dev, void * data)
984 if (scsi_is_target_device(dev))
985 __scsi_remove_target(to_scsi_target(dev));
990 * scsi_remove_target - try to remove a target and all its devices
991 * @dev: generic starget or parent of generic stargets to be removed
993 * Note: This is slightly racy. It is possible that if the user
994 * requests the addition of another device then the target won't be
997 void scsi_remove_target(struct device *dev)
999 if (scsi_is_target_device(dev)) {
1000 __scsi_remove_target(to_scsi_target(dev));
1005 device_for_each_child(dev, NULL, __remove_child);
1008 EXPORT_SYMBOL(scsi_remove_target);
1010 int scsi_register_driver(struct device_driver *drv)
1012 drv->bus = &scsi_bus_type;
1014 return driver_register(drv);
1016 EXPORT_SYMBOL(scsi_register_driver);
1018 int scsi_register_interface(struct class_interface *intf)
1020 intf->class = &sdev_class;
1022 return class_interface_register(intf);
1024 EXPORT_SYMBOL(scsi_register_interface);
1027 * scsi_sysfs_add_host - add scsi host to subsystem
1028 * @shost: scsi host struct to add to subsystem
1030 int scsi_sysfs_add_host(struct Scsi_Host *shost)
1034 /* add host specific attributes */
1035 if (shost->hostt->shost_attrs) {
1036 for (i = 0; shost->hostt->shost_attrs[i]; i++) {
1037 error = device_create_file(&shost->shost_dev,
1038 shost->hostt->shost_attrs[i]);
1044 transport_register_device(&shost->shost_gendev);
1045 transport_configure_device(&shost->shost_gendev);
1049 static struct device_type scsi_dev_type = {
1050 .name = "scsi_device",
1051 .release = scsi_device_dev_release,
1052 .groups = scsi_sdev_attr_groups,
1055 void scsi_sysfs_device_initialize(struct scsi_device *sdev)
1057 unsigned long flags;
1058 struct Scsi_Host *shost = sdev->host;
1059 struct scsi_target *starget = sdev->sdev_target;
1061 device_initialize(&sdev->sdev_gendev);
1062 sdev->sdev_gendev.bus = &scsi_bus_type;
1063 sdev->sdev_gendev.type = &scsi_dev_type;
1064 dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%d",
1065 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1067 device_initialize(&sdev->sdev_dev);
1068 sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev);
1069 sdev->sdev_dev.class = &sdev_class;
1070 dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%d",
1071 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1072 sdev->scsi_level = starget->scsi_level;
1073 transport_setup_device(&sdev->sdev_gendev);
1074 spin_lock_irqsave(shost->host_lock, flags);
1075 list_add_tail(&sdev->same_target_siblings, &starget->devices);
1076 list_add_tail(&sdev->siblings, &shost->__devices);
1077 spin_unlock_irqrestore(shost->host_lock, flags);
1080 int scsi_is_sdev_device(const struct device *dev)
1082 return dev->type == &scsi_dev_type;
1084 EXPORT_SYMBOL(scsi_is_sdev_device);
1086 /* A blank transport template that is used in drivers that don't
1087 * yet implement Transport Attributes */
1088 struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, };