blob: fa4711d127449834373a4881f96fc4f48f79aa80 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * scsi_sysfs.c
3 *
4 * SCSI sysfs interface routines.
5 *
6 * Created to pull SCSI mid layer sysfs routines into one file.
7 */
8
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#include <linux/module.h>
10#include <linux/init.h>
11#include <linux/blkdev.h>
12#include <linux/device.h>
13
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>
Adrian Bunk44818ef2007-07-09 11:59:59 -070019#include <scsi/scsi_driver.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070020
21#include "scsi_priv.h"
22#include "scsi_logging.h"
23
Hannes Reineckeb0ed4332008-03-18 14:32:28 +010024static struct device_type scsi_dev_type;
25
Arjan van de Ven0ad78202005-11-28 16:22:25 +010026static const struct {
Linus Torvalds1da177e2005-04-16 15:20:36 -070027 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" },
James Bottomley6f4267e2008-08-22 16:53:31 -050037 { SDEV_CREATED_BLOCK, "created-blocked" },
Linus Torvalds1da177e2005-04-16 15:20:36 -070038};
39
40const char *scsi_device_state_name(enum scsi_device_state state)
41{
42 int i;
43 char *name = NULL;
44
Tobias Klauser6391a112006-06-08 22:23:48 -070045 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070046 if (sdev_states[i].value == state) {
47 name = sdev_states[i].name;
48 break;
49 }
50 }
51 return name;
52}
53
Arjan van de Ven0ad78202005-11-28 16:22:25 +010054static const struct {
Mike Andersond3301872005-06-16 11:12:38 -070055 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" },
James Bottomley939647e2005-09-18 15:05:20 -050063 { SHOST_CANCEL_RECOVERY, "cancel/recovery" },
64 { SHOST_DEL_RECOVERY, "deleted/recovery", },
Mike Andersond3301872005-06-16 11:12:38 -070065};
66const char *scsi_host_state_name(enum scsi_host_state state)
67{
68 int i;
69 char *name = NULL;
70
Tobias Klauser6391a112006-06-08 22:23:48 -070071 for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
Mike Andersond3301872005-06-16 11:12:38 -070072 if (shost_states[i].value == state) {
73 name = shost_states[i].name;
74 break;
75 }
76 }
77 return name;
78}
79
Linus Torvalds1da177e2005-04-16 15:20:36 -070080static int check_set(unsigned int *val, char *src)
81{
82 char *last;
83
84 if (strncmp(src, "-", 20) == 0) {
85 *val = SCAN_WILD_CARD;
86 } else {
87 /*
88 * Doesn't check for int overflow
89 */
90 *val = simple_strtoul(src, &last, 0);
91 if (*last != '\0')
92 return 1;
93 }
94 return 0;
95}
96
97static int scsi_scan(struct Scsi_Host *shost, const char *str)
98{
99 char s1[15], s2[15], s3[15], junk;
100 unsigned int channel, id, lun;
101 int res;
102
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;
Christoph Hellwige02f3f52006-01-13 19:04:00 +0100112 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 return res;
117}
118
119/*
120 * shost_show_function: macro to create an attr function that can be used to
121 * show a non-bit field.
122 */
123#define shost_show_function(name, field, format_string) \
124static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100125show_##name (struct device *dev, struct device_attribute *attr, \
126 char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127{ \
Tony Jonesee959b02008-02-22 00:13:36 +0100128 struct Scsi_Host *shost = class_to_shost(dev); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 return snprintf (buf, 20, format_string, shost->field); \
130}
131
132/*
133 * shost_rd_attr: macro to create a function and attribute variable for a
134 * read only field.
135 */
136#define shost_rd_attr2(name, field, format_string) \
137 shost_show_function(name, field, format_string) \
Tony Jonesee959b02008-02-22 00:13:36 +0100138static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139
140#define shost_rd_attr(field, format_string) \
141shost_rd_attr2(field, field, format_string)
142
143/*
144 * Create the actual show/store functions and data structures.
145 */
146
Tony Jonesee959b02008-02-22 00:13:36 +0100147static ssize_t
148store_scan(struct device *dev, struct device_attribute *attr,
149 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150{
Tony Jonesee959b02008-02-22 00:13:36 +0100151 struct Scsi_Host *shost = class_to_shost(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 int res;
153
154 res = scsi_scan(shost, buf);
155 if (res == 0)
156 res = count;
157 return res;
158};
Tony Jonesee959b02008-02-22 00:13:36 +0100159static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
Mike Andersond3301872005-06-16 11:12:38 -0700161static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100162store_shost_state(struct device *dev, struct device_attribute *attr,
163 const char *buf, size_t count)
Mike Andersond3301872005-06-16 11:12:38 -0700164{
165 int i;
Tony Jonesee959b02008-02-22 00:13:36 +0100166 struct Scsi_Host *shost = class_to_shost(dev);
Mike Andersond3301872005-06-16 11:12:38 -0700167 enum scsi_host_state state = 0;
168
Tobias Klauser6391a112006-06-08 22:23:48 -0700169 for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
Mike Andersond3301872005-06-16 11:12:38 -0700170 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;
175 }
176 }
177 if (!state)
178 return -EINVAL;
179
180 if (scsi_host_set_state(shost, state))
181 return -EINVAL;
182 return count;
183}
184
185static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100186show_shost_state(struct device *dev, struct device_attribute *attr, char *buf)
Mike Andersond3301872005-06-16 11:12:38 -0700187{
Tony Jonesee959b02008-02-22 00:13:36 +0100188 struct Scsi_Host *shost = class_to_shost(dev);
Mike Andersond3301872005-06-16 11:12:38 -0700189 const char *name = scsi_host_state_name(shost->shost_state);
190
191 if (!name)
192 return -EINVAL;
193
194 return snprintf(buf, 20, "%s\n", name);
195}
196
Tony Jonesee959b02008-02-22 00:13:36 +0100197/* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */
198struct device_attribute dev_attr_hstate =
199 __ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state);
Mike Andersond3301872005-06-16 11:12:38 -0700200
FUJITA Tomonori5dc2b892007-09-01 02:02:20 +0900201static ssize_t
202show_shost_mode(unsigned int mode, char *buf)
203{
204 ssize_t len = 0;
205
206 if (mode & MODE_INITIATOR)
207 len = sprintf(buf, "%s", "Initiator");
208
209 if (mode & MODE_TARGET)
210 len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target");
211
212 len += sprintf(buf + len, "\n");
213
214 return len;
215}
216
Tony Jonesee959b02008-02-22 00:13:36 +0100217static ssize_t
218show_shost_supported_mode(struct device *dev, struct device_attribute *attr,
219 char *buf)
FUJITA Tomonori5dc2b892007-09-01 02:02:20 +0900220{
Tony Jonesee959b02008-02-22 00:13:36 +0100221 struct Scsi_Host *shost = class_to_shost(dev);
James Bottomley7a39ac32007-09-25 22:45:53 -0500222 unsigned int supported_mode = shost->hostt->supported_mode;
FUJITA Tomonori5dc2b892007-09-01 02:02:20 +0900223
James Bottomley7a39ac32007-09-25 22:45:53 -0500224 if (supported_mode == MODE_UNKNOWN)
225 /* by default this should be initiator */
226 supported_mode = MODE_INITIATOR;
227
228 return show_shost_mode(supported_mode, buf);
FUJITA Tomonori5dc2b892007-09-01 02:02:20 +0900229}
230
Tony Jonesee959b02008-02-22 00:13:36 +0100231static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL);
FUJITA Tomonori5dc2b892007-09-01 02:02:20 +0900232
Tony Jonesee959b02008-02-22 00:13:36 +0100233static ssize_t
234show_shost_active_mode(struct device *dev,
235 struct device_attribute *attr, char *buf)
FUJITA Tomonori5dc2b892007-09-01 02:02:20 +0900236{
Tony Jonesee959b02008-02-22 00:13:36 +0100237 struct Scsi_Host *shost = class_to_shost(dev);
FUJITA Tomonori5dc2b892007-09-01 02:02:20 +0900238
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);
243}
244
Tony Jonesee959b02008-02-22 00:13:36 +0100245static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL);
FUJITA Tomonori5dc2b892007-09-01 02:02:20 +0900246
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247shost_rd_attr(unique_id, "%u\n");
248shost_rd_attr(host_busy, "%hu\n");
249shost_rd_attr(cmd_per_lun, "%hd\n");
James Bottomleyed632da2006-10-16 10:06:27 -0500250shost_rd_attr(can_queue, "%hd\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251shost_rd_attr(sg_tablesize, "%hu\n");
252shost_rd_attr(unchecked_isa_dma, "%d\n");
Martin K. Petersen4469f982008-07-17 04:28:30 -0400253shost_rd_attr(prot_capabilities, "%u\n");
254shost_rd_attr(prot_guard_type, "%hd\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255shost_rd_attr2(proc_name, hostt->proc_name, "%s\n");
256
Hannes Reineckef7120a42008-03-18 14:32:28 +0100257static 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,
Martin K. Petersen4469f982008-07-17 04:28:30 -0400269 &dev_attr_prot_capabilities.attr,
270 &dev_attr_prot_guard_type.attr,
Hannes Reineckef7120a42008-03-18 14:32:28 +0100271 NULL
272};
273
274struct attribute_group scsi_shost_attr_group = {
275 .attrs = scsi_sysfs_shost_attrs,
276};
277
278struct attribute_group *scsi_sysfs_shost_attr_groups[] = {
279 &scsi_shost_attr_group,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 NULL
281};
282
Tony Jonesee959b02008-02-22 00:13:36 +0100283static void scsi_device_cls_release(struct device *class_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284{
285 struct scsi_device *sdev;
286
287 sdev = class_to_sdev(class_dev);
288 put_device(&sdev->sdev_gendev);
289}
290
David Howells65f27f32006-11-22 14:55:48 +0000291static void scsi_device_dev_release_usercontext(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292{
293 struct scsi_device *sdev;
294 struct device *parent;
295 struct scsi_target *starget;
Jeff Garzika341cd02007-10-29 17:15:22 -0400296 struct list_head *this, *tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 unsigned long flags;
298
David Howells65f27f32006-11-22 14:55:48 +0000299 sdev = container_of(work, struct scsi_device, ew.work);
300
301 parent = sdev->sdev_gendev.parent;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 starget = to_scsi_target(parent);
303
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);
310
Jeff Garzika341cd02007-10-29 17:15:22 -0400311 cancel_work_sync(&sdev->event_work);
312
313 list_for_each_safe(this, tmp, &sdev->event_list) {
314 struct scsi_event *evt;
315
316 evt = list_entry(this, struct scsi_event, node);
317 list_del(&evt->node);
318 kfree(evt);
319 }
320
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 if (sdev->request_queue) {
322 sdev->request_queue->queuedata = NULL;
James Bottomley65110b22006-02-14 10:48:46 -0600323 /* user context needed to free queue */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 scsi_free_queue(sdev->request_queue);
c2a93312005-04-12 16:38:09 -0500325 /* temporary expedient, try to catch use of queue lock
326 * after free of sdev */
327 sdev->request_queue = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 }
329
330 scsi_target_reap(scsi_target(sdev));
331
332 kfree(sdev->inquiry);
333 kfree(sdev);
334
335 if (parent)
336 put_device(parent);
337}
338
James Bottomley65110b22006-02-14 10:48:46 -0600339static void scsi_device_dev_release(struct device *dev)
340{
James Bottomleyffedb452006-02-23 14:27:18 -0600341 struct scsi_device *sdp = to_scsi_device(dev);
David Howells65f27f32006-11-22 14:55:48 +0000342 execute_in_process_context(scsi_device_dev_release_usercontext,
James Bottomleyffedb452006-02-23 14:27:18 -0600343 &sdp->ew);
James Bottomley65110b22006-02-14 10:48:46 -0600344}
345
Adrian Bunk52c1da32005-06-23 22:05:33 -0700346static struct class sdev_class = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 .name = "scsi_device",
Tony Jonesee959b02008-02-22 00:13:36 +0100348 .dev_release = scsi_device_cls_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349};
350
351/* all probing is done in the individual ->probe routines */
352static int scsi_bus_match(struct device *dev, struct device_driver *gendrv)
353{
Hannes Reineckeb0ed4332008-03-18 14:32:28 +0100354 struct scsi_device *sdp;
355
356 if (dev->type != &scsi_dev_type)
357 return 0;
358
359 sdp = to_scsi_device(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 if (sdp->no_uld_attach)
361 return 0;
362 return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0;
363}
364
Kay Sievers7eff2e72007-08-14 15:15:12 +0200365static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
Michael Tokarevd7b8bcb2006-10-27 16:02:37 +0400366{
James Bottomley1f42ea72008-05-22 12:34:41 +0100367 struct scsi_device *sdev;
368
369 if (dev->type != &scsi_dev_type)
370 return 0;
371
372 sdev = to_scsi_device(dev);
Michael Tokarevd7b8bcb2006-10-27 16:02:37 +0400373
Kay Sievers7eff2e72007-08-14 15:15:12 +0200374 add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type);
Michael Tokarevd7b8bcb2006-10-27 16:02:37 +0400375 return 0;
376}
377
Jens Axboe9b847542006-01-06 09:28:07 +0100378static int scsi_bus_suspend(struct device * dev, pm_message_t state)
379{
Hannes Reineckeb0ed4332008-03-18 14:32:28 +0100380 struct device_driver *drv;
381 struct scsi_device *sdev;
Jens Axboe9b847542006-01-06 09:28:07 +0100382 int err;
383
Hannes Reineckeb0ed4332008-03-18 14:32:28 +0100384 if (dev->type != &scsi_dev_type)
385 return 0;
386
387 drv = dev->driver;
388 sdev = to_scsi_device(dev);
389
Jens Axboe9b847542006-01-06 09:28:07 +0100390 err = scsi_device_quiesce(sdev);
391 if (err)
392 return err;
393
Tejun Heoc3c94c52007-03-21 00:13:59 +0900394 if (drv && drv->suspend) {
395 err = drv->suspend(dev, state);
396 if (err)
397 return err;
398 }
Jens Axboe9b847542006-01-06 09:28:07 +0100399
Tejun Heoc3c94c52007-03-21 00:13:59 +0900400 return 0;
Jens Axboe9b847542006-01-06 09:28:07 +0100401}
402
403static int scsi_bus_resume(struct device * dev)
404{
Hannes Reineckeb0ed4332008-03-18 14:32:28 +0100405 struct device_driver *drv;
406 struct scsi_device *sdev;
Tejun Heo1dfcda02007-03-21 16:05:16 +0900407 int err = 0;
Jens Axboe9b847542006-01-06 09:28:07 +0100408
Hannes Reineckeb0ed4332008-03-18 14:32:28 +0100409 if (dev->type != &scsi_dev_type)
410 return 0;
411
412 drv = dev->driver;
413 sdev = to_scsi_device(dev);
414
Tejun Heoc3c94c52007-03-21 00:13:59 +0900415 if (drv && drv->resume)
Tejun Heo1dfcda02007-03-21 16:05:16 +0900416 err = drv->resume(dev);
Tejun Heoc3c94c52007-03-21 00:13:59 +0900417
Jens Axboe9b847542006-01-06 09:28:07 +0100418 scsi_device_resume(sdev);
Tejun Heoc3c94c52007-03-21 00:13:59 +0900419
Tejun Heo1dfcda02007-03-21 16:05:16 +0900420 return err;
Jens Axboe9b847542006-01-06 09:28:07 +0100421}
422
James Bottomley751bf4d2008-01-02 11:14:30 -0600423static int scsi_bus_remove(struct device *dev)
424{
425 struct device_driver *drv = dev->driver;
426 struct scsi_device *sdev = to_scsi_device(dev);
427 int err = 0;
428
429 /* reset the prep_fn back to the default since the
430 * driver may have altered it and it's being removed */
431 blk_queue_prep_rq(sdev->request_queue, scsi_prep_fn);
432
433 if (drv && drv->remove)
434 err = drv->remove(dev);
435
436 return 0;
437}
438
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439struct bus_type scsi_bus_type = {
440 .name = "scsi",
441 .match = scsi_bus_match,
Michael Tokarevd7b8bcb2006-10-27 16:02:37 +0400442 .uevent = scsi_bus_uevent,
Jens Axboe9b847542006-01-06 09:28:07 +0100443 .suspend = scsi_bus_suspend,
444 .resume = scsi_bus_resume,
James Bottomley751bf4d2008-01-02 11:14:30 -0600445 .remove = scsi_bus_remove,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446};
Chandra Seetharamana6a8d9f2008-05-01 14:49:46 -0700447EXPORT_SYMBOL_GPL(scsi_bus_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448
449int scsi_sysfs_register(void)
450{
451 int error;
452
453 error = bus_register(&scsi_bus_type);
454 if (!error) {
455 error = class_register(&sdev_class);
456 if (error)
457 bus_unregister(&scsi_bus_type);
458 }
459
460 return error;
461}
462
463void scsi_sysfs_unregister(void)
464{
465 class_unregister(&sdev_class);
466 bus_unregister(&scsi_bus_type);
467}
468
469/*
470 * sdev_show_function: macro to create an attr function that can be used to
471 * show a non-bit field.
472 */
473#define sdev_show_function(field, format_string) \
474static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100475sdev_show_##field (struct device *dev, struct device_attribute *attr, \
476 char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477{ \
478 struct scsi_device *sdev; \
479 sdev = to_scsi_device(dev); \
480 return snprintf (buf, 20, format_string, sdev->field); \
481} \
482
483/*
484 * sdev_rd_attr: macro to create a function and attribute variable for a
485 * read only field.
486 */
487#define sdev_rd_attr(field, format_string) \
488 sdev_show_function(field, format_string) \
489static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL);
490
491
492/*
493 * sdev_rd_attr: create a function and attribute variable for a
494 * read/write field.
495 */
496#define sdev_rw_attr(field, format_string) \
497 sdev_show_function(field, format_string) \
498 \
499static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100500sdev_store_##field (struct device *dev, struct device_attribute *attr, \
501 const char *buf, size_t count) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502{ \
503 struct scsi_device *sdev; \
504 sdev = to_scsi_device(dev); \
505 snscanf (buf, 20, format_string, &sdev->field); \
506 return count; \
507} \
508static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
509
510/* Currently we don't export bit fields, but we might in future,
511 * so leave this code in */
512#if 0
513/*
514 * sdev_rd_attr: create a function and attribute variable for a
515 * read/write bit field.
516 */
517#define sdev_rw_attr_bit(field) \
518 sdev_show_function(field, "%d\n") \
519 \
520static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100521sdev_store_##field (struct device *dev, struct device_attribute *attr, \
522 const char *buf, size_t count) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523{ \
524 int ret; \
525 struct scsi_device *sdev; \
526 ret = scsi_sdev_check_buf_bit(buf); \
527 if (ret >= 0) { \
528 sdev = to_scsi_device(dev); \
529 sdev->field = ret; \
530 ret = count; \
531 } \
532 return ret; \
533} \
534static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
535
536/*
537 * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1",
538 * else return -EINVAL.
539 */
540static int scsi_sdev_check_buf_bit(const char *buf)
541{
542 if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
543 if (buf[0] == '1')
544 return 1;
545 else if (buf[0] == '0')
546 return 0;
547 else
548 return -EINVAL;
549 } else
550 return -EINVAL;
551}
552#endif
553/*
554 * Create the actual show/store functions and data structures.
555 */
556sdev_rd_attr (device_blocked, "%d\n");
557sdev_rd_attr (queue_depth, "%d\n");
558sdev_rd_attr (type, "%d\n");
559sdev_rd_attr (scsi_level, "%d\n");
560sdev_rd_attr (vendor, "%.8s\n");
561sdev_rd_attr (model, "%.16s\n");
562sdev_rd_attr (rev, "%.4s\n");
563
Jens Axboe242f9dc2008-09-14 05:55:09 -0700564/*
565 * TODO: can we make these symlinks to the block layer ones?
566 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567static ssize_t
Yani Ioannou10523b32005-05-17 06:43:37 -0400568sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569{
570 struct scsi_device *sdev;
571 sdev = to_scsi_device(dev);
Jens Axboe242f9dc2008-09-14 05:55:09 -0700572 return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573}
574
575static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100576sdev_store_timeout (struct device *dev, struct device_attribute *attr,
577 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578{
579 struct scsi_device *sdev;
580 int timeout;
581 sdev = to_scsi_device(dev);
582 sscanf (buf, "%d\n", &timeout);
Jens Axboe242f9dc2008-09-14 05:55:09 -0700583 blk_queue_rq_timeout(sdev->request_queue, timeout * HZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 return count;
585}
586static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout);
587
588static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100589store_rescan_field (struct device *dev, struct device_attribute *attr,
590 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591{
592 scsi_rescan_device(dev);
593 return count;
594}
595static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field);
596
Alan Sternd9a9cdf2007-03-15 15:50:34 -0400597static void sdev_store_delete_callback(struct device *dev)
598{
599 scsi_remove_device(to_scsi_device(dev));
600}
601
Tony Jonesee959b02008-02-22 00:13:36 +0100602static ssize_t
603sdev_store_delete(struct device *dev, struct device_attribute *attr,
604 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605{
Alan Sternd9a9cdf2007-03-15 15:50:34 -0400606 int rc;
607
608 /* An attribute cannot be unregistered by one of its own methods,
609 * so we have to use this roundabout approach.
610 */
611 rc = device_schedule_callback(dev, sdev_store_delete_callback);
612 if (rc)
613 count = rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614 return count;
615};
616static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete);
617
618static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100619store_state_field(struct device *dev, struct device_attribute *attr,
620 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621{
622 int i;
623 struct scsi_device *sdev = to_scsi_device(dev);
624 enum scsi_device_state state = 0;
625
Tobias Klauser6391a112006-06-08 22:23:48 -0700626 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 const int len = strlen(sdev_states[i].name);
628 if (strncmp(sdev_states[i].name, buf, len) == 0 &&
629 buf[len] == '\n') {
630 state = sdev_states[i].value;
631 break;
632 }
633 }
634 if (!state)
635 return -EINVAL;
636
637 if (scsi_device_set_state(sdev, state))
638 return -EINVAL;
639 return count;
640}
641
642static ssize_t
Yani Ioannou10523b32005-05-17 06:43:37 -0400643show_state_field(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644{
645 struct scsi_device *sdev = to_scsi_device(dev);
646 const char *name = scsi_device_state_name(sdev->sdev_state);
647
648 if (!name)
649 return -EINVAL;
650
651 return snprintf(buf, 20, "%s\n", name);
652}
653
654static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field);
655
656static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100657show_queue_type_field(struct device *dev, struct device_attribute *attr,
658 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659{
660 struct scsi_device *sdev = to_scsi_device(dev);
661 const char *name = "none";
662
663 if (sdev->ordered_tags)
664 name = "ordered";
665 else if (sdev->simple_tags)
666 name = "simple";
667
668 return snprintf(buf, 20, "%s\n", name);
669}
670
671static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL);
672
673static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100674show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675{
676 return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8);
677}
678
679static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL);
680
681#define show_sdev_iostat(field) \
682static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100683show_iostat_##field(struct device *dev, struct device_attribute *attr, \
684 char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685{ \
686 struct scsi_device *sdev = to_scsi_device(dev); \
687 unsigned long long count = atomic_read(&sdev->field); \
688 return snprintf(buf, 20, "0x%llx\n", count); \
689} \
690static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL)
691
692show_sdev_iostat(iorequest_cnt);
693show_sdev_iostat(iodone_cnt);
694show_sdev_iostat(ioerr_cnt);
695
Michael Tokarevd7b8bcb2006-10-27 16:02:37 +0400696static ssize_t
697sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
698{
699 struct scsi_device *sdev;
700 sdev = to_scsi_device(dev);
701 return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type);
702}
703static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704
Jeff Garzika341cd02007-10-29 17:15:22 -0400705#define DECLARE_EVT_SHOW(name, Cap_name) \
706static ssize_t \
707sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \
Tony Jonesee959b02008-02-22 00:13:36 +0100708 char *buf) \
Jeff Garzika341cd02007-10-29 17:15:22 -0400709{ \
710 struct scsi_device *sdev = to_scsi_device(dev); \
711 int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\
712 return snprintf(buf, 20, "%d\n", val); \
713}
714
715#define DECLARE_EVT_STORE(name, Cap_name) \
716static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100717sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\
Jeff Garzika341cd02007-10-29 17:15:22 -0400718 const char *buf, size_t count) \
719{ \
720 struct scsi_device *sdev = to_scsi_device(dev); \
721 int val = simple_strtoul(buf, NULL, 0); \
722 if (val == 0) \
723 clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
724 else if (val == 1) \
725 set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
726 else \
727 return -EINVAL; \
728 return count; \
729}
730
731#define DECLARE_EVT(name, Cap_name) \
732 DECLARE_EVT_SHOW(name, Cap_name) \
733 DECLARE_EVT_STORE(name, Cap_name) \
734 static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \
735 sdev_store_evt_##name);
736#define REF_EVT(name) &dev_attr_evt_##name.attr
737
738DECLARE_EVT(media_change, MEDIA_CHANGE)
739
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740/* Default template for device attributes. May NOT be modified */
Kay Sieversbfd12942007-09-11 17:00:14 +0200741static struct attribute *scsi_sdev_attrs[] = {
742 &dev_attr_device_blocked.attr,
743 &dev_attr_type.attr,
744 &dev_attr_scsi_level.attr,
745 &dev_attr_vendor.attr,
746 &dev_attr_model.attr,
747 &dev_attr_rev.attr,
748 &dev_attr_rescan.attr,
749 &dev_attr_delete.attr,
750 &dev_attr_state.attr,
751 &dev_attr_timeout.attr,
752 &dev_attr_iocounterbits.attr,
753 &dev_attr_iorequest_cnt.attr,
754 &dev_attr_iodone_cnt.attr,
755 &dev_attr_ioerr_cnt.attr,
756 &dev_attr_modalias.attr,
Jeff Garzika341cd02007-10-29 17:15:22 -0400757 REF_EVT(media_change),
Kay Sieversbfd12942007-09-11 17:00:14 +0200758 NULL
759};
760
761static struct attribute_group scsi_sdev_attr_group = {
762 .attrs = scsi_sdev_attrs,
763};
764
765static struct attribute_group *scsi_sdev_attr_groups[] = {
766 &scsi_sdev_attr_group,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 NULL
768};
769
Tony Jonesee959b02008-02-22 00:13:36 +0100770static ssize_t
771sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr,
772 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773{
774 int depth, retval;
775 struct scsi_device *sdev = to_scsi_device(dev);
776 struct scsi_host_template *sht = sdev->host->hostt;
777
778 if (!sht->change_queue_depth)
779 return -EINVAL;
780
781 depth = simple_strtoul(buf, NULL, 0);
782
783 if (depth < 1)
784 return -EINVAL;
785
786 retval = sht->change_queue_depth(sdev, depth);
787 if (retval < 0)
788 return retval;
789
790 return count;
791}
792
793static struct device_attribute sdev_attr_queue_depth_rw =
794 __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth,
795 sdev_store_queue_depth_rw);
796
Tony Jonesee959b02008-02-22 00:13:36 +0100797static ssize_t
798sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr,
799 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800{
801 struct scsi_device *sdev = to_scsi_device(dev);
802 struct scsi_host_template *sht = sdev->host->hostt;
803 int tag_type = 0, retval;
804 int prev_tag_type = scsi_get_tag_type(sdev);
805
806 if (!sdev->tagged_supported || !sht->change_queue_type)
807 return -EINVAL;
808
809 if (strncmp(buf, "ordered", 7) == 0)
810 tag_type = MSG_ORDERED_TAG;
811 else if (strncmp(buf, "simple", 6) == 0)
812 tag_type = MSG_SIMPLE_TAG;
813 else if (strncmp(buf, "none", 4) != 0)
814 return -EINVAL;
815
816 if (tag_type == prev_tag_type)
817 return count;
818
819 retval = sht->change_queue_type(sdev, tag_type);
820 if (retval < 0)
821 return retval;
822
823 return count;
824}
825
James Bottomley643eb2d2008-03-22 22:42:27 -0500826static int scsi_target_add(struct scsi_target *starget)
827{
828 int error;
829
830 if (starget->state != STARGET_CREATED)
831 return 0;
832
833 error = device_add(&starget->dev);
834 if (error) {
835 dev_err(&starget->dev, "target device_add failed, error %d\n", error);
836 get_device(&starget->dev);
837 scsi_target_reap(starget);
838 put_device(&starget->dev);
839 return error;
840 }
841 transport_add_device(&starget->dev);
842 starget->state = STARGET_RUNNING;
843
844 return 0;
845}
846
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847static struct device_attribute sdev_attr_queue_type_rw =
848 __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field,
849 sdev_store_queue_type_rw);
850
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851/**
852 * scsi_sysfs_add_sdev - add scsi device to sysfs
853 * @sdev: scsi_device to add
854 *
855 * Return value:
856 * 0 on Success / non-zero on Failure
857 **/
858int scsi_sysfs_add_sdev(struct scsi_device *sdev)
859{
860 int error, i;
James Bottomley80ed71c2007-07-19 10:15:10 -0500861 struct request_queue *rq = sdev->request_queue;
James Bottomley643eb2d2008-03-22 22:42:27 -0500862 struct scsi_target *starget = sdev->sdev_target;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863
864 if ((error = scsi_device_set_state(sdev, SDEV_RUNNING)) != 0)
865 return error;
866
James Bottomley643eb2d2008-03-22 22:42:27 -0500867 error = scsi_target_add(starget);
868 if (error)
869 return error;
870
871 transport_configure_device(&starget->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872 error = device_add(&sdev->sdev_gendev);
873 if (error) {
874 put_device(sdev->sdev_gendev.parent);
875 printk(KERN_INFO "error 1\n");
876 return error;
877 }
Tony Jonesee959b02008-02-22 00:13:36 +0100878 error = device_add(&sdev->sdev_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879 if (error) {
880 printk(KERN_INFO "error 2\n");
881 goto clean_device;
882 }
883
Tony Jonesee959b02008-02-22 00:13:36 +0100884 /* take a reference for the sdev_dev; this is
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885 * released by the sdev_class .release */
886 get_device(&sdev->sdev_gendev);
James Bottomley80ed71c2007-07-19 10:15:10 -0500887
Kay Sieversbfd12942007-09-11 17:00:14 +0200888 /* create queue files, which may be writable, depending on the host */
889 if (sdev->host->hostt->change_queue_depth)
890 error = device_create_file(&sdev->sdev_gendev, &sdev_attr_queue_depth_rw);
891 else
892 error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_depth);
893 if (error) {
894 __scsi_remove_device(sdev);
895 goto out;
896 }
897 if (sdev->host->hostt->change_queue_type)
898 error = device_create_file(&sdev->sdev_gendev, &sdev_attr_queue_type_rw);
899 else
900 error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_type);
901 if (error) {
902 __scsi_remove_device(sdev);
903 goto out;
904 }
905
FUJITA Tomonori97f46ae2008-04-19 00:43:14 +0900906 error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL);
James Bottomley80ed71c2007-07-19 10:15:10 -0500907
908 if (error)
909 sdev_printk(KERN_INFO, sdev,
910 "Failed to register bsg queue, errno=%d\n", error);
911
912 /* we're treating error on bsg register as non-fatal, so pretend
913 * nothing went wrong */
914 error = 0;
915
Kay Sieversbfd12942007-09-11 17:00:14 +0200916 /* add additional host specific attributes */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 if (sdev->host->hostt->sdev_attrs) {
918 for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) {
Kay Sieversbfd12942007-09-11 17:00:14 +0200919 error = device_create_file(&sdev->sdev_gendev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 sdev->host->hostt->sdev_attrs[i]);
921 if (error) {
Alan Stern903f4fe2005-07-26 10:20:53 -0400922 __scsi_remove_device(sdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923 goto out;
924 }
925 }
926 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927
928 transport_add_device(&sdev->sdev_gendev);
929 out:
930 return error;
931
932 clean_device:
933 scsi_device_set_state(sdev, SDEV_CANCEL);
934
935 device_del(&sdev->sdev_gendev);
936 transport_destroy_device(&sdev->sdev_gendev);
937 put_device(&sdev->sdev_gendev);
938
939 return error;
940}
941
Alan Stern903f4fe2005-07-26 10:20:53 -0400942void __scsi_remove_device(struct scsi_device *sdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943{
James Bottomleydf133c22005-11-06 11:47:08 -0600944 struct device *dev = &sdev->sdev_gendev;
945
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946 if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0)
Alan Stern903f4fe2005-07-26 10:20:53 -0400947 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948
James Bottomley0feed272008-03-26 09:09:19 -0700949 bsg_unregister_queue(sdev->request_queue);
Tony Jonesee959b02008-02-22 00:13:36 +0100950 device_unregister(&sdev->sdev_dev);
James Bottomleydf133c22005-11-06 11:47:08 -0600951 transport_remove_device(dev);
952 device_del(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953 scsi_device_set_state(sdev, SDEV_DEL);
954 if (sdev->host->hostt->slave_destroy)
955 sdev->host->hostt->slave_destroy(sdev);
James Bottomleydf133c22005-11-06 11:47:08 -0600956 transport_destroy_device(dev);
957 put_device(dev);
Alan Stern903f4fe2005-07-26 10:20:53 -0400958}
959
960/**
961 * scsi_remove_device - unregister a device from the scsi bus
962 * @sdev: scsi_device to unregister
963 **/
964void scsi_remove_device(struct scsi_device *sdev)
965{
Alan Stern54195002005-09-15 21:52:51 -0400966 struct Scsi_Host *shost = sdev->host;
967
Arjan van de Ven0b950672006-01-11 13:16:10 +0100968 mutex_lock(&shost->scan_mutex);
Alan Stern903f4fe2005-07-26 10:20:53 -0400969 __scsi_remove_device(sdev);
Arjan van de Ven0b950672006-01-11 13:16:10 +0100970 mutex_unlock(&shost->scan_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971}
972EXPORT_SYMBOL(scsi_remove_device);
973
Adrian Bunk44818ef2007-07-09 11:59:59 -0700974static void __scsi_remove_target(struct scsi_target *starget)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975{
976 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
977 unsigned long flags;
Alan Sterna64358d2005-07-26 10:27:10 -0400978 struct scsi_device *sdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979
980 spin_lock_irqsave(shost->host_lock, flags);
981 starget->reap_ref++;
Alan Sterna64358d2005-07-26 10:27:10 -0400982 restart:
983 list_for_each_entry(sdev, &shost->__devices, siblings) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 if (sdev->channel != starget->channel ||
Alan Sterna64358d2005-07-26 10:27:10 -0400985 sdev->id != starget->id ||
986 sdev->sdev_state == SDEV_DEL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987 continue;
988 spin_unlock_irqrestore(shost->host_lock, flags);
989 scsi_remove_device(sdev);
990 spin_lock_irqsave(shost->host_lock, flags);
Alan Sterna64358d2005-07-26 10:27:10 -0400991 goto restart;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992 }
993 spin_unlock_irqrestore(shost->host_lock, flags);
994 scsi_target_reap(starget);
995}
996
mochel@digitalimplant.org20b1e672005-03-24 19:03:59 -0800997static int __remove_child (struct device * dev, void * data)
998{
999 if (scsi_is_target_device(dev))
1000 __scsi_remove_target(to_scsi_target(dev));
1001 return 0;
1002}
1003
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004/**
1005 * scsi_remove_target - try to remove a target and all its devices
1006 * @dev: generic starget or parent of generic stargets to be removed
1007 *
1008 * Note: This is slightly racy. It is possible that if the user
1009 * requests the addition of another device then the target won't be
1010 * removed.
1011 */
1012void scsi_remove_target(struct device *dev)
1013{
mochel@digitalimplant.org20b1e672005-03-24 19:03:59 -08001014 struct device *rdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001015
1016 if (scsi_is_target_device(dev)) {
1017 __scsi_remove_target(to_scsi_target(dev));
1018 return;
1019 }
1020
1021 rdev = get_device(dev);
mochel@digitalimplant.org20b1e672005-03-24 19:03:59 -08001022 device_for_each_child(dev, NULL, __remove_child);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023 put_device(rdev);
1024}
1025EXPORT_SYMBOL(scsi_remove_target);
1026
1027int scsi_register_driver(struct device_driver *drv)
1028{
1029 drv->bus = &scsi_bus_type;
1030
1031 return driver_register(drv);
1032}
1033EXPORT_SYMBOL(scsi_register_driver);
1034
1035int scsi_register_interface(struct class_interface *intf)
1036{
1037 intf->class = &sdev_class;
1038
1039 return class_interface_register(intf);
1040}
1041EXPORT_SYMBOL(scsi_register_interface);
1042
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043/**
1044 * scsi_sysfs_add_host - add scsi host to subsystem
1045 * @shost: scsi host struct to add to subsystem
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046 **/
1047int scsi_sysfs_add_host(struct Scsi_Host *shost)
1048{
1049 int error, i;
1050
Hannes Reineckef7120a42008-03-18 14:32:28 +01001051 /* add host specific attributes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052 if (shost->hostt->shost_attrs) {
1053 for (i = 0; shost->hostt->shost_attrs[i]; i++) {
Tony Jonesee959b02008-02-22 00:13:36 +01001054 error = device_create_file(&shost->shost_dev,
Hannes Reineckef7120a42008-03-18 14:32:28 +01001055 shost->hostt->shost_attrs[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056 if (error)
1057 return error;
1058 }
1059 }
1060
1061 transport_register_device(&shost->shost_gendev);
James Bottomleyd52b3812008-01-05 09:38:30 -06001062 transport_configure_device(&shost->shost_gendev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063 return 0;
1064}
1065
Kay Sieversbfd12942007-09-11 17:00:14 +02001066static struct device_type scsi_dev_type = {
1067 .name = "scsi_device",
1068 .release = scsi_device_dev_release,
1069 .groups = scsi_sdev_attr_groups,
1070};
1071
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072void scsi_sysfs_device_initialize(struct scsi_device *sdev)
1073{
1074 unsigned long flags;
1075 struct Scsi_Host *shost = sdev->host;
1076 struct scsi_target *starget = sdev->sdev_target;
1077
1078 device_initialize(&sdev->sdev_gendev);
1079 sdev->sdev_gendev.bus = &scsi_bus_type;
Kay Sieversbfd12942007-09-11 17:00:14 +02001080 sdev->sdev_gendev.type = &scsi_dev_type;
Kay Sievers71610f52008-12-03 22:41:36 +01001081 dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%d",
1082 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1083
Tony Jonesee959b02008-02-22 00:13:36 +01001084 device_initialize(&sdev->sdev_dev);
1085 sdev->sdev_dev.parent = &sdev->sdev_gendev;
1086 sdev->sdev_dev.class = &sdev_class;
Kay Sievers71610f52008-12-03 22:41:36 +01001087 dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%d",
1088 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
Alan Stern7c9d6f12007-01-08 11:12:32 -05001089 sdev->scsi_level = starget->scsi_level;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090 transport_setup_device(&sdev->sdev_gendev);
1091 spin_lock_irqsave(shost->host_lock, flags);
1092 list_add_tail(&sdev->same_target_siblings, &starget->devices);
1093 list_add_tail(&sdev->siblings, &shost->__devices);
1094 spin_unlock_irqrestore(shost->host_lock, flags);
1095}
1096
1097int scsi_is_sdev_device(const struct device *dev)
1098{
Kay Sievers13ba9bc2007-09-26 19:54:49 +02001099 return dev->type == &scsi_dev_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100}
1101EXPORT_SYMBOL(scsi_is_sdev_device);
1102
1103/* A blank transport template that is used in drivers that don't
1104 * yet implement Transport Attributes */
1105struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, };