mac80211: let cfg80211 manage auth state
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / scsi / scsi_sysfs.c
blob392d8db33905cbe31f1e2f96644552d9b692eb27
1 /*
2 * scsi_sysfs.c
4 * SCSI sysfs interface routines.
6 * Created to pull SCSI mid layer sysfs routines into one file.
7 */
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;
26 static const struct {
27 enum scsi_device_state value;
28 char *name;
29 } sdev_states[] = {
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)
42 int i;
43 char *name = NULL;
45 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
46 if (sdev_states[i].value == state) {
47 name = sdev_states[i].name;
48 break;
51 return name;
54 static const struct {
55 enum scsi_host_state value;
56 char *name;
57 } shost_states[] = {
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)
68 int i;
69 char *name = NULL;
71 for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
72 if (shost_states[i].value == state) {
73 name = shost_states[i].name;
74 break;
77 return name;
80 static int check_set(unsigned int *val, char *src)
82 char *last;
84 if (strncmp(src, "-", 20) == 0) {
85 *val = SCAN_WILD_CARD;
86 } else {
88 * Doesn't check for int overflow
90 *val = simple_strtoul(src, &last, 0);
91 if (*last != '\0')
92 return 1;
94 return 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;
101 int res;
103 res = sscanf(str, "%10s %10s %10s %c", s1, s2, s3, &junk);
104 if (res != 3)
105 return -EINVAL;
106 if (check_set(&channel, s1))
107 return -EINVAL;
108 if (check_set(&id, s2))
109 return -EINVAL;
110 if (check_set(&lun, s3))
111 return -EINVAL;
112 if (shost->transportt->user_scan)
113 res = shost->transportt->user_scan(shost, channel, id, lun);
114 else
115 res = scsi_scan_host_selected(shost, channel, id, lun, 1);
116 return res;
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) \
124 static ssize_t \
125 show_##name (struct device *dev, struct device_attribute *attr, \
126 char *buf) \
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
134 * read only field.
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.
147 static ssize_t
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);
152 int res;
154 res = scsi_scan(shost, buf);
155 if (res == 0)
156 res = count;
157 return res;
159 static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan);
161 static ssize_t
162 store_shost_state(struct device *dev, struct device_attribute *attr,
163 const char *buf, size_t count)
165 int i;
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 &&
172 buf[len] == '\n') {
173 state = shost_states[i].value;
174 break;
177 if (!state)
178 return -EINVAL;
180 if (scsi_host_set_state(shost, state))
181 return -EINVAL;
182 return count;
185 static ssize_t
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);
191 if (!name)
192 return -EINVAL;
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);
201 static ssize_t
202 show_shost_mode(unsigned int mode, char *buf)
204 ssize_t len = 0;
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");
214 return len;
217 static ssize_t
218 show_shost_supported_mode(struct device *dev, struct device_attribute *attr,
219 char *buf)
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);
233 static ssize_t
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");
241 else
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,
265 &dev_attr_scan.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,
271 NULL
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,
280 NULL
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;
297 unsigned long flags;
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);
305 starget->reap_ref++;
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);
318 kfree(evt);
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);
333 kfree(sdev);
335 if (parent)
336 put_device(parent);
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,
343 &sdp->ew);
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)
357 return 0;
359 sdp = to_scsi_device(dev);
360 if (sdp->no_uld_attach)
361 return 0;
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)
370 return 0;
372 sdev = to_scsi_device(dev);
374 add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type);
375 return 0;
378 static int scsi_bus_suspend(struct device * dev, pm_message_t state)
380 struct device_driver *drv;
381 struct scsi_device *sdev;
382 int err;
384 if (dev->type != &scsi_dev_type)
385 return 0;
387 drv = dev->driver;
388 sdev = to_scsi_device(dev);
390 err = scsi_device_quiesce(sdev);
391 if (err)
392 return err;
394 if (drv && drv->suspend) {
395 err = drv->suspend(dev, state);
396 if (err)
397 return err;
400 return 0;
403 static int scsi_bus_resume(struct device * dev)
405 struct device_driver *drv;
406 struct scsi_device *sdev;
407 int err = 0;
409 if (dev->type != &scsi_dev_type)
410 return 0;
412 drv = dev->driver;
413 sdev = to_scsi_device(dev);
415 if (drv && drv->resume)
416 err = drv->resume(dev);
418 scsi_device_resume(sdev);
420 return err;
423 struct bus_type scsi_bus_type = {
424 .name = "scsi",
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)
434 int error;
436 error = bus_register(&scsi_bus_type);
437 if (!error) {
438 error = class_register(&sdev_class);
439 if (error)
440 bus_unregister(&scsi_bus_type);
443 return error;
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) \
457 static ssize_t \
458 sdev_show_##field (struct device *dev, struct device_attribute *attr, \
459 char *buf) \
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
468 * read only field.
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
477 * read/write field.
479 #define sdev_rw_attr(field, format_string) \
480 sdev_show_function(field, format_string) \
482 static ssize_t \
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); \
489 return count; \
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 */
495 #if 0
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") \
503 static ssize_t \
504 sdev_store_##field (struct device *dev, struct device_attribute *attr, \
505 const char *buf, size_t count) \
507 int ret; \
508 struct scsi_device *sdev; \
509 ret = scsi_sdev_check_buf_bit(buf); \
510 if (ret >= 0) { \
511 sdev = to_scsi_device(dev); \
512 sdev->field = ret; \
513 ret = count; \
515 return ret; \
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'))) {
526 if (buf[0] == '1')
527 return 1;
528 else if (buf[0] == '0')
529 return 0;
530 else
531 return -EINVAL;
532 } else
533 return -EINVAL;
535 #endif
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?
550 static ssize_t
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);
558 static ssize_t
559 sdev_store_timeout (struct device *dev, struct device_attribute *attr,
560 const char *buf, size_t count)
562 struct scsi_device *sdev;
563 int timeout;
564 sdev = to_scsi_device(dev);
565 sscanf (buf, "%d\n", &timeout);
566 blk_queue_rq_timeout(sdev->request_queue, timeout * HZ);
567 return count;
569 static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout);
571 static ssize_t
572 store_rescan_field (struct device *dev, struct device_attribute *attr,
573 const char *buf, size_t count)
575 scsi_rescan_device(dev);
576 return count;
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));
585 static ssize_t
586 sdev_store_delete(struct device *dev, struct device_attribute *attr,
587 const char *buf, size_t count)
589 int rc;
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);
595 if (rc)
596 count = rc;
597 return count;
599 static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete);
601 static ssize_t
602 store_state_field(struct device *dev, struct device_attribute *attr,
603 const char *buf, size_t count)
605 int i;
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 &&
612 buf[len] == '\n') {
613 state = sdev_states[i].value;
614 break;
617 if (!state)
618 return -EINVAL;
620 if (scsi_device_set_state(sdev, state))
621 return -EINVAL;
622 return count;
625 static ssize_t
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);
631 if (!name)
632 return -EINVAL;
634 return snprintf(buf, 20, "%s\n", name);
637 static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field);
639 static ssize_t
640 show_queue_type_field(struct device *dev, struct device_attribute *attr,
641 char *buf)
643 struct scsi_device *sdev = to_scsi_device(dev);
644 const char *name = "none";
646 if (sdev->ordered_tags)
647 name = "ordered";
648 else if (sdev->simple_tags)
649 name = "simple";
651 return snprintf(buf, 20, "%s\n", name);
654 static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL);
656 static ssize_t
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) \
665 static ssize_t \
666 show_iostat_##field(struct device *dev, struct device_attribute *attr, \
667 char *buf) \
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);
679 static ssize_t
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) \
689 static ssize_t \
690 sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \
691 char *buf) \
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) \
699 static ssize_t \
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); \
705 if (val == 0) \
706 clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
707 else if (val == 1) \
708 set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
709 else \
710 return -EINVAL; \
711 return count; \
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,
726 &dev_attr_type.attr,
727 &dev_attr_scsi_level.attr,
728 &dev_attr_vendor.attr,
729 &dev_attr_model.attr,
730 &dev_attr_rev.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),
741 NULL
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,
750 NULL
753 static ssize_t
754 sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr,
755 const char *buf, size_t count)
757 int depth, retval;
758 struct scsi_device *sdev = to_scsi_device(dev);
759 struct scsi_host_template *sht = sdev->host->hostt;
761 if (!sht->change_queue_depth)
762 return -EINVAL;
764 depth = simple_strtoul(buf, NULL, 0);
766 if (depth < 1)
767 return -EINVAL;
769 retval = sht->change_queue_depth(sdev, depth);
770 if (retval < 0)
771 return retval;
773 return count;
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);
780 static ssize_t
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)
790 return -EINVAL;
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)
797 return -EINVAL;
799 if (tag_type == prev_tag_type)
800 return count;
802 retval = sht->change_queue_type(sdev, tag_type);
803 if (retval < 0)
804 return retval;
806 return count;
809 static int scsi_target_add(struct scsi_target *starget)
811 int error;
813 if (starget->state != STARGET_CREATED)
814 return 0;
816 error = device_add(&starget->dev);
817 if (error) {
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);
822 return error;
824 transport_add_device(&starget->dev);
825 starget->state = STARGET_RUNNING;
827 return 0;
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
838 * Return value:
839 * 0 on Success / non-zero on Failure
841 int scsi_sysfs_add_sdev(struct scsi_device *sdev)
843 int error, i;
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)
848 return error;
850 error = scsi_target_add(starget);
851 if (error)
852 return error;
854 transport_configure_device(&starget->dev);
855 error = device_add(&sdev->sdev_gendev);
856 if (error) {
857 printk(KERN_INFO "error 1\n");
858 goto out_remove;
860 error = device_add(&sdev->sdev_dev);
861 if (error) {
862 printk(KERN_INFO "error 2\n");
863 device_del(&sdev->sdev_gendev);
864 goto out_remove;
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);
872 else
873 error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_depth);
874 if (error)
875 goto out_remove;
877 if (sdev->host->hostt->change_queue_type)
878 error = device_create_file(&sdev->sdev_gendev, &sdev_attr_queue_type_rw);
879 else
880 error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_type);
881 if (error)
882 goto out_remove;
884 error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL);
886 if (error)
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]);
897 if (error)
898 goto out_remove;
902 return 0;
904 out_remove:
905 __scsi_remove_device(sdev);
906 return error;
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)
916 return;
918 bsg_unregister_queue(sdev->request_queue);
919 device_unregister(&sdev->sdev_dev);
920 transport_remove_device(dev);
921 device_del(dev);
922 } else
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);
928 put_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);
948 unsigned long flags;
949 struct scsi_device *sdev;
951 spin_lock_irqsave(shost->host_lock, flags);
952 starget->reap_ref++;
953 restart:
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)
958 continue;
959 spin_unlock_irqrestore(shost->host_lock, flags);
960 scsi_remove_device(sdev);
961 spin_lock_irqsave(shost->host_lock, flags);
962 goto restart;
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));
972 return 0;
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
981 * removed.
983 void scsi_remove_target(struct device *dev)
985 struct device *rdev;
987 if (scsi_is_target_device(dev)) {
988 __scsi_remove_target(to_scsi_target(dev));
989 return;
992 rdev = get_device(dev);
993 device_for_each_child(dev, NULL, __remove_child);
994 put_device(rdev);
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)
1020 int error, i;
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]);
1027 if (error)
1028 return error;
1032 transport_register_device(&shost->shost_gendev);
1033 transport_configure_device(&shost->shost_gendev);
1034 return 0;
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, }, }, }, };