blob: fde54537d715cf185f1d6edef655cee1136c2beb [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
David Brownella4dbd672009-06-24 10:06:31 -0700278const struct attribute_group *scsi_sysfs_shost_attr_groups[] = {
Hannes Reineckef7120a42008-03-18 14:32:28 +0100279 &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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423struct bus_type scsi_bus_type = {
424 .name = "scsi",
425 .match = scsi_bus_match,
Michael Tokarevd7b8bcb2006-10-27 16:02:37 +0400426 .uevent = scsi_bus_uevent,
Jens Axboe9b847542006-01-06 09:28:07 +0100427 .suspend = scsi_bus_suspend,
428 .resume = scsi_bus_resume,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429};
Chandra Seetharamana6a8d9f2008-05-01 14:49:46 -0700430EXPORT_SYMBOL_GPL(scsi_bus_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431
432int scsi_sysfs_register(void)
433{
434 int error;
435
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);
441 }
442
443 return error;
444}
445
446void scsi_sysfs_unregister(void)
447{
448 class_unregister(&sdev_class);
449 bus_unregister(&scsi_bus_type);
450}
451
452/*
453 * sdev_show_function: macro to create an attr function that can be used to
454 * show a non-bit field.
455 */
456#define sdev_show_function(field, format_string) \
457static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100458sdev_show_##field (struct device *dev, struct device_attribute *attr, \
459 char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460{ \
461 struct scsi_device *sdev; \
462 sdev = to_scsi_device(dev); \
463 return snprintf (buf, 20, format_string, sdev->field); \
464} \
465
466/*
467 * sdev_rd_attr: macro to create a function and attribute variable for a
468 * read only field.
469 */
470#define sdev_rd_attr(field, format_string) \
471 sdev_show_function(field, format_string) \
472static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL);
473
474
475/*
476 * sdev_rd_attr: create a function and attribute variable for a
477 * read/write field.
478 */
479#define sdev_rw_attr(field, format_string) \
480 sdev_show_function(field, format_string) \
481 \
482static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100483sdev_store_##field (struct device *dev, struct device_attribute *attr, \
484 const char *buf, size_t count) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485{ \
486 struct scsi_device *sdev; \
487 sdev = to_scsi_device(dev); \
488 snscanf (buf, 20, format_string, &sdev->field); \
489 return count; \
490} \
491static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
492
493/* Currently we don't export bit fields, but we might in future,
494 * so leave this code in */
495#if 0
496/*
497 * sdev_rd_attr: create a function and attribute variable for a
498 * read/write bit field.
499 */
500#define sdev_rw_attr_bit(field) \
501 sdev_show_function(field, "%d\n") \
502 \
503static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100504sdev_store_##field (struct device *dev, struct device_attribute *attr, \
505 const char *buf, size_t count) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506{ \
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; \
514 } \
515 return ret; \
516} \
517static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
518
519/*
520 * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1",
521 * else return -EINVAL.
522 */
523static int scsi_sdev_check_buf_bit(const char *buf)
524{
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;
534}
535#endif
536/*
537 * Create the actual show/store functions and data structures.
538 */
539sdev_rd_attr (device_blocked, "%d\n");
540sdev_rd_attr (queue_depth, "%d\n");
541sdev_rd_attr (type, "%d\n");
542sdev_rd_attr (scsi_level, "%d\n");
543sdev_rd_attr (vendor, "%.8s\n");
544sdev_rd_attr (model, "%.16s\n");
545sdev_rd_attr (rev, "%.4s\n");
546
Jens Axboe242f9dc2008-09-14 05:55:09 -0700547/*
548 * TODO: can we make these symlinks to the block layer ones?
549 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550static ssize_t
Yani Ioannou10523b32005-05-17 06:43:37 -0400551sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552{
553 struct scsi_device *sdev;
554 sdev = to_scsi_device(dev);
Jens Axboe242f9dc2008-09-14 05:55:09 -0700555 return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556}
557
558static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100559sdev_store_timeout (struct device *dev, struct device_attribute *attr,
560 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561{
562 struct scsi_device *sdev;
563 int timeout;
564 sdev = to_scsi_device(dev);
565 sscanf (buf, "%d\n", &timeout);
Jens Axboe242f9dc2008-09-14 05:55:09 -0700566 blk_queue_rq_timeout(sdev->request_queue, timeout * HZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567 return count;
568}
569static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout);
570
571static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100572store_rescan_field (struct device *dev, struct device_attribute *attr,
573 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574{
575 scsi_rescan_device(dev);
576 return count;
577}
578static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field);
579
Alan Sternd9a9cdf2007-03-15 15:50:34 -0400580static void sdev_store_delete_callback(struct device *dev)
581{
582 scsi_remove_device(to_scsi_device(dev));
583}
584
Tony Jonesee959b02008-02-22 00:13:36 +0100585static ssize_t
586sdev_store_delete(struct device *dev, struct device_attribute *attr,
587 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588{
Alan Sternd9a9cdf2007-03-15 15:50:34 -0400589 int rc;
590
591 /* An attribute cannot be unregistered by one of its own methods,
592 * so we have to use this roundabout approach.
593 */
594 rc = device_schedule_callback(dev, sdev_store_delete_callback);
595 if (rc)
596 count = rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597 return count;
598};
599static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete);
600
601static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100602store_state_field(struct device *dev, struct device_attribute *attr,
603 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604{
605 int i;
606 struct scsi_device *sdev = to_scsi_device(dev);
607 enum scsi_device_state state = 0;
608
Tobias Klauser6391a112006-06-08 22:23:48 -0700609 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610 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;
615 }
616 }
617 if (!state)
618 return -EINVAL;
619
620 if (scsi_device_set_state(sdev, state))
621 return -EINVAL;
622 return count;
623}
624
625static ssize_t
Yani Ioannou10523b32005-05-17 06:43:37 -0400626show_state_field(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627{
628 struct scsi_device *sdev = to_scsi_device(dev);
629 const char *name = scsi_device_state_name(sdev->sdev_state);
630
631 if (!name)
632 return -EINVAL;
633
634 return snprintf(buf, 20, "%s\n", name);
635}
636
637static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field);
638
639static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100640show_queue_type_field(struct device *dev, struct device_attribute *attr,
641 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642{
643 struct scsi_device *sdev = to_scsi_device(dev);
644 const char *name = "none";
645
646 if (sdev->ordered_tags)
647 name = "ordered";
648 else if (sdev->simple_tags)
649 name = "simple";
650
651 return snprintf(buf, 20, "%s\n", name);
652}
653
654static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL);
655
656static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100657show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658{
659 return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8);
660}
661
662static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL);
663
664#define show_sdev_iostat(field) \
665static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100666show_iostat_##field(struct device *dev, struct device_attribute *attr, \
667 char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668{ \
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); \
672} \
673static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL)
674
675show_sdev_iostat(iorequest_cnt);
676show_sdev_iostat(iodone_cnt);
677show_sdev_iostat(ioerr_cnt);
678
Michael Tokarevd7b8bcb2006-10-27 16:02:37 +0400679static ssize_t
680sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
681{
682 struct scsi_device *sdev;
683 sdev = to_scsi_device(dev);
684 return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type);
685}
686static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687
Jeff Garzika341cd02007-10-29 17:15:22 -0400688#define DECLARE_EVT_SHOW(name, Cap_name) \
689static ssize_t \
690sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \
Tony Jonesee959b02008-02-22 00:13:36 +0100691 char *buf) \
Jeff Garzika341cd02007-10-29 17:15:22 -0400692{ \
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); \
696}
697
698#define DECLARE_EVT_STORE(name, Cap_name) \
699static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100700sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\
Jeff Garzika341cd02007-10-29 17:15:22 -0400701 const char *buf, size_t count) \
702{ \
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; \
712}
713
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
720
721DECLARE_EVT(media_change, MEDIA_CHANGE)
722
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723/* Default template for device attributes. May NOT be modified */
Kay Sieversbfd12942007-09-11 17:00:14 +0200724static 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,
Jeff Garzika341cd02007-10-29 17:15:22 -0400740 REF_EVT(media_change),
Kay Sieversbfd12942007-09-11 17:00:14 +0200741 NULL
742};
743
744static struct attribute_group scsi_sdev_attr_group = {
745 .attrs = scsi_sdev_attrs,
746};
747
David Brownella4dbd672009-06-24 10:06:31 -0700748static const struct attribute_group *scsi_sdev_attr_groups[] = {
Kay Sieversbfd12942007-09-11 17:00:14 +0200749 &scsi_sdev_attr_group,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750 NULL
751};
752
Tony Jonesee959b02008-02-22 00:13:36 +0100753static ssize_t
754sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr,
755 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756{
757 int depth, retval;
758 struct scsi_device *sdev = to_scsi_device(dev);
759 struct scsi_host_template *sht = sdev->host->hostt;
760
761 if (!sht->change_queue_depth)
762 return -EINVAL;
763
764 depth = simple_strtoul(buf, NULL, 0);
765
766 if (depth < 1)
767 return -EINVAL;
768
769 retval = sht->change_queue_depth(sdev, depth);
770 if (retval < 0)
771 return retval;
772
773 return count;
774}
775
776static 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);
779
Tony Jonesee959b02008-02-22 00:13:36 +0100780static ssize_t
781sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr,
782 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783{
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);
788
789 if (!sdev->tagged_supported || !sht->change_queue_type)
790 return -EINVAL;
791
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;
798
799 if (tag_type == prev_tag_type)
800 return count;
801
802 retval = sht->change_queue_type(sdev, tag_type);
803 if (retval < 0)
804 return retval;
805
806 return count;
807}
808
James Bottomley643eb2d2008-03-22 22:42:27 -0500809static int scsi_target_add(struct scsi_target *starget)
810{
811 int error;
812
813 if (starget->state != STARGET_CREATED)
814 return 0;
815
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;
823 }
824 transport_add_device(&starget->dev);
825 starget->state = STARGET_RUNNING;
826
827 return 0;
828}
829
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830static 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);
833
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834/**
835 * scsi_sysfs_add_sdev - add scsi device to sysfs
836 * @sdev: scsi_device to add
837 *
838 * Return value:
839 * 0 on Success / non-zero on Failure
840 **/
841int scsi_sysfs_add_sdev(struct scsi_device *sdev)
842{
843 int error, i;
James Bottomley80ed71c2007-07-19 10:15:10 -0500844 struct request_queue *rq = sdev->request_queue;
James Bottomley643eb2d2008-03-22 22:42:27 -0500845 struct scsi_target *starget = sdev->sdev_target;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846
847 if ((error = scsi_device_set_state(sdev, SDEV_RUNNING)) != 0)
848 return error;
849
James Bottomley643eb2d2008-03-22 22:42:27 -0500850 error = scsi_target_add(starget);
851 if (error)
852 return error;
853
854 transport_configure_device(&starget->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855 error = device_add(&sdev->sdev_gendev);
856 if (error) {
857 put_device(sdev->sdev_gendev.parent);
858 printk(KERN_INFO "error 1\n");
859 return error;
860 }
Tony Jonesee959b02008-02-22 00:13:36 +0100861 error = device_add(&sdev->sdev_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862 if (error) {
863 printk(KERN_INFO "error 2\n");
864 goto clean_device;
865 }
866
Tony Jonesee959b02008-02-22 00:13:36 +0100867 /* take a reference for the sdev_dev; this is
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868 * released by the sdev_class .release */
869 get_device(&sdev->sdev_gendev);
James Bottomley80ed71c2007-07-19 10:15:10 -0500870
Kay Sieversbfd12942007-09-11 17:00:14 +0200871 /* create queue files, which may be writable, depending on the host */
872 if (sdev->host->hostt->change_queue_depth)
873 error = device_create_file(&sdev->sdev_gendev, &sdev_attr_queue_depth_rw);
874 else
875 error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_depth);
876 if (error) {
877 __scsi_remove_device(sdev);
878 goto out;
879 }
880 if (sdev->host->hostt->change_queue_type)
881 error = device_create_file(&sdev->sdev_gendev, &sdev_attr_queue_type_rw);
882 else
883 error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_type);
884 if (error) {
885 __scsi_remove_device(sdev);
886 goto out;
887 }
888
FUJITA Tomonori97f46ae2008-04-19 00:43:14 +0900889 error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL);
James Bottomley80ed71c2007-07-19 10:15:10 -0500890
891 if (error)
892 sdev_printk(KERN_INFO, sdev,
893 "Failed to register bsg queue, errno=%d\n", error);
894
895 /* we're treating error on bsg register as non-fatal, so pretend
896 * nothing went wrong */
897 error = 0;
898
Kay Sieversbfd12942007-09-11 17:00:14 +0200899 /* add additional host specific attributes */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900 if (sdev->host->hostt->sdev_attrs) {
901 for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) {
Kay Sieversbfd12942007-09-11 17:00:14 +0200902 error = device_create_file(&sdev->sdev_gendev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903 sdev->host->hostt->sdev_attrs[i]);
904 if (error) {
Alan Stern903f4fe2005-07-26 10:20:53 -0400905 __scsi_remove_device(sdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906 goto out;
907 }
908 }
909 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910
911 transport_add_device(&sdev->sdev_gendev);
912 out:
913 return error;
914
915 clean_device:
916 scsi_device_set_state(sdev, SDEV_CANCEL);
917
918 device_del(&sdev->sdev_gendev);
919 transport_destroy_device(&sdev->sdev_gendev);
920 put_device(&sdev->sdev_gendev);
921
922 return error;
923}
924
Alan Stern903f4fe2005-07-26 10:20:53 -0400925void __scsi_remove_device(struct scsi_device *sdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926{
James Bottomleydf133c22005-11-06 11:47:08 -0600927 struct device *dev = &sdev->sdev_gendev;
928
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929 if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0)
Alan Stern903f4fe2005-07-26 10:20:53 -0400930 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931
James Bottomley0feed272008-03-26 09:09:19 -0700932 bsg_unregister_queue(sdev->request_queue);
Tony Jonesee959b02008-02-22 00:13:36 +0100933 device_unregister(&sdev->sdev_dev);
James Bottomleydf133c22005-11-06 11:47:08 -0600934 transport_remove_device(dev);
935 device_del(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936 scsi_device_set_state(sdev, SDEV_DEL);
937 if (sdev->host->hostt->slave_destroy)
938 sdev->host->hostt->slave_destroy(sdev);
James Bottomleydf133c22005-11-06 11:47:08 -0600939 transport_destroy_device(dev);
940 put_device(dev);
Alan Stern903f4fe2005-07-26 10:20:53 -0400941}
942
943/**
944 * scsi_remove_device - unregister a device from the scsi bus
945 * @sdev: scsi_device to unregister
946 **/
947void scsi_remove_device(struct scsi_device *sdev)
948{
Alan Stern54195002005-09-15 21:52:51 -0400949 struct Scsi_Host *shost = sdev->host;
950
Arjan van de Ven0b950672006-01-11 13:16:10 +0100951 mutex_lock(&shost->scan_mutex);
Alan Stern903f4fe2005-07-26 10:20:53 -0400952 __scsi_remove_device(sdev);
Arjan van de Ven0b950672006-01-11 13:16:10 +0100953 mutex_unlock(&shost->scan_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954}
955EXPORT_SYMBOL(scsi_remove_device);
956
Adrian Bunk44818ef2007-07-09 11:59:59 -0700957static void __scsi_remove_target(struct scsi_target *starget)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958{
959 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
960 unsigned long flags;
Alan Sterna64358d2005-07-26 10:27:10 -0400961 struct scsi_device *sdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962
963 spin_lock_irqsave(shost->host_lock, flags);
964 starget->reap_ref++;
Alan Sterna64358d2005-07-26 10:27:10 -0400965 restart:
966 list_for_each_entry(sdev, &shost->__devices, siblings) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967 if (sdev->channel != starget->channel ||
Alan Sterna64358d2005-07-26 10:27:10 -0400968 sdev->id != starget->id ||
969 sdev->sdev_state == SDEV_DEL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970 continue;
971 spin_unlock_irqrestore(shost->host_lock, flags);
972 scsi_remove_device(sdev);
973 spin_lock_irqsave(shost->host_lock, flags);
Alan Sterna64358d2005-07-26 10:27:10 -0400974 goto restart;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975 }
976 spin_unlock_irqrestore(shost->host_lock, flags);
977 scsi_target_reap(starget);
978}
979
mochel@digitalimplant.org20b1e672005-03-24 19:03:59 -0800980static int __remove_child (struct device * dev, void * data)
981{
982 if (scsi_is_target_device(dev))
983 __scsi_remove_target(to_scsi_target(dev));
984 return 0;
985}
986
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987/**
988 * scsi_remove_target - try to remove a target and all its devices
989 * @dev: generic starget or parent of generic stargets to be removed
990 *
991 * Note: This is slightly racy. It is possible that if the user
992 * requests the addition of another device then the target won't be
993 * removed.
994 */
995void scsi_remove_target(struct device *dev)
996{
mochel@digitalimplant.org20b1e672005-03-24 19:03:59 -0800997 struct device *rdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998
999 if (scsi_is_target_device(dev)) {
1000 __scsi_remove_target(to_scsi_target(dev));
1001 return;
1002 }
1003
1004 rdev = get_device(dev);
mochel@digitalimplant.org20b1e672005-03-24 19:03:59 -08001005 device_for_each_child(dev, NULL, __remove_child);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006 put_device(rdev);
1007}
1008EXPORT_SYMBOL(scsi_remove_target);
1009
1010int scsi_register_driver(struct device_driver *drv)
1011{
1012 drv->bus = &scsi_bus_type;
1013
1014 return driver_register(drv);
1015}
1016EXPORT_SYMBOL(scsi_register_driver);
1017
1018int scsi_register_interface(struct class_interface *intf)
1019{
1020 intf->class = &sdev_class;
1021
1022 return class_interface_register(intf);
1023}
1024EXPORT_SYMBOL(scsi_register_interface);
1025
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026/**
1027 * scsi_sysfs_add_host - add scsi host to subsystem
1028 * @shost: scsi host struct to add to subsystem
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029 **/
1030int scsi_sysfs_add_host(struct Scsi_Host *shost)
1031{
1032 int error, i;
1033
Hannes Reineckef7120a42008-03-18 14:32:28 +01001034 /* add host specific attributes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 if (shost->hostt->shost_attrs) {
1036 for (i = 0; shost->hostt->shost_attrs[i]; i++) {
Tony Jonesee959b02008-02-22 00:13:36 +01001037 error = device_create_file(&shost->shost_dev,
Hannes Reineckef7120a42008-03-18 14:32:28 +01001038 shost->hostt->shost_attrs[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039 if (error)
1040 return error;
1041 }
1042 }
1043
1044 transport_register_device(&shost->shost_gendev);
James Bottomleyd52b3812008-01-05 09:38:30 -06001045 transport_configure_device(&shost->shost_gendev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046 return 0;
1047}
1048
Kay Sieversbfd12942007-09-11 17:00:14 +02001049static struct device_type scsi_dev_type = {
1050 .name = "scsi_device",
1051 .release = scsi_device_dev_release,
1052 .groups = scsi_sdev_attr_groups,
1053};
1054
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055void scsi_sysfs_device_initialize(struct scsi_device *sdev)
1056{
1057 unsigned long flags;
1058 struct Scsi_Host *shost = sdev->host;
1059 struct scsi_target *starget = sdev->sdev_target;
1060
1061 device_initialize(&sdev->sdev_gendev);
1062 sdev->sdev_gendev.bus = &scsi_bus_type;
Kay Sieversbfd12942007-09-11 17:00:14 +02001063 sdev->sdev_gendev.type = &scsi_dev_type;
Kay Sievers71610f52008-12-03 22:41:36 +01001064 dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%d",
1065 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1066
Tony Jonesee959b02008-02-22 00:13:36 +01001067 device_initialize(&sdev->sdev_dev);
1068 sdev->sdev_dev.parent = &sdev->sdev_gendev;
1069 sdev->sdev_dev.class = &sdev_class;
Kay Sievers71610f52008-12-03 22:41:36 +01001070 dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%d",
1071 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
Alan Stern7c9d6f12007-01-08 11:12:32 -05001072 sdev->scsi_level = starget->scsi_level;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073 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);
1078}
1079
1080int scsi_is_sdev_device(const struct device *dev)
1081{
Kay Sievers13ba9bc2007-09-26 19:54:49 +02001082 return dev->type == &scsi_dev_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083}
1084EXPORT_SYMBOL(scsi_is_sdev_device);
1085
1086/* A blank transport template that is used in drivers that don't
1087 * yet implement Transport Attributes */
1088struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, };