blob: b333389f248ffec291958014a39829156a188bd0 [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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090010#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070011#include <linux/init.h>
12#include <linux/blkdev.h>
13#include <linux/device.h>
Alan Sternbc4f2402010-06-17 10:41:42 -040014#include <linux/pm_runtime.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015
16#include <scsi/scsi.h>
17#include <scsi/scsi_device.h>
18#include <scsi/scsi_host.h>
19#include <scsi/scsi_tcq.h>
20#include <scsi/scsi_transport.h>
Adrian Bunk44818ef2007-07-09 11:59:59 -070021#include <scsi/scsi_driver.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022
23#include "scsi_priv.h"
24#include "scsi_logging.h"
25
Hannes Reineckeb0ed4332008-03-18 14:32:28 +010026static struct device_type scsi_dev_type;
27
Arjan van de Ven0ad78202005-11-28 16:22:25 +010028static const struct {
Linus Torvalds1da177e2005-04-16 15:20:36 -070029 enum scsi_device_state value;
30 char *name;
31} sdev_states[] = {
32 { SDEV_CREATED, "created" },
33 { SDEV_RUNNING, "running" },
34 { SDEV_CANCEL, "cancel" },
35 { SDEV_DEL, "deleted" },
36 { SDEV_QUIESCE, "quiesce" },
37 { SDEV_OFFLINE, "offline" },
Mike Christie1b8d2622012-05-17 23:56:56 -050038 { SDEV_TRANSPORT_OFFLINE, "transport-offline" },
Linus Torvalds1da177e2005-04-16 15:20:36 -070039 { SDEV_BLOCK, "blocked" },
James Bottomley6f4267e2008-08-22 16:53:31 -050040 { SDEV_CREATED_BLOCK, "created-blocked" },
Linus Torvalds1da177e2005-04-16 15:20:36 -070041};
42
43const char *scsi_device_state_name(enum scsi_device_state state)
44{
45 int i;
46 char *name = NULL;
47
Tobias Klauser6391a112006-06-08 22:23:48 -070048 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070049 if (sdev_states[i].value == state) {
50 name = sdev_states[i].name;
51 break;
52 }
53 }
54 return name;
55}
56
Arjan van de Ven0ad78202005-11-28 16:22:25 +010057static const struct {
Mike Andersond3301872005-06-16 11:12:38 -070058 enum scsi_host_state value;
59 char *name;
60} shost_states[] = {
61 { SHOST_CREATED, "created" },
62 { SHOST_RUNNING, "running" },
63 { SHOST_CANCEL, "cancel" },
64 { SHOST_DEL, "deleted" },
65 { SHOST_RECOVERY, "recovery" },
James Bottomley939647e2005-09-18 15:05:20 -050066 { SHOST_CANCEL_RECOVERY, "cancel/recovery" },
67 { SHOST_DEL_RECOVERY, "deleted/recovery", },
Mike Andersond3301872005-06-16 11:12:38 -070068};
69const char *scsi_host_state_name(enum scsi_host_state state)
70{
71 int i;
72 char *name = NULL;
73
Tobias Klauser6391a112006-06-08 22:23:48 -070074 for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
Mike Andersond3301872005-06-16 11:12:38 -070075 if (shost_states[i].value == state) {
76 name = shost_states[i].name;
77 break;
78 }
79 }
80 return name;
81}
82
Hannes Reinecke9cb78c12014-06-25 15:27:36 +020083static int check_set(unsigned long long *val, char *src)
Linus Torvalds1da177e2005-04-16 15:20:36 -070084{
85 char *last;
86
87 if (strncmp(src, "-", 20) == 0) {
88 *val = SCAN_WILD_CARD;
89 } else {
90 /*
91 * Doesn't check for int overflow
92 */
Hannes Reinecke9cb78c12014-06-25 15:27:36 +020093 *val = simple_strtoull(src, &last, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 if (*last != '\0')
95 return 1;
96 }
97 return 0;
98}
99
100static int scsi_scan(struct Scsi_Host *shost, const char *str)
101{
Hannes Reinecke9cb78c12014-06-25 15:27:36 +0200102 char s1[15], s2[15], s3[17], junk;
103 unsigned long long channel, id, lun;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 int res;
105
Hannes Reinecke9cb78c12014-06-25 15:27:36 +0200106 res = sscanf(str, "%10s %10s %16s %c", s1, s2, s3, &junk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 if (res != 3)
108 return -EINVAL;
109 if (check_set(&channel, s1))
110 return -EINVAL;
111 if (check_set(&id, s2))
112 return -EINVAL;
113 if (check_set(&lun, s3))
114 return -EINVAL;
Christoph Hellwige02f3f52006-01-13 19:04:00 +0100115 if (shost->transportt->user_scan)
116 res = shost->transportt->user_scan(shost, channel, id, lun);
117 else
118 res = scsi_scan_host_selected(shost, channel, id, lun, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 return res;
120}
121
122/*
123 * shost_show_function: macro to create an attr function that can be used to
124 * show a non-bit field.
125 */
126#define shost_show_function(name, field, format_string) \
127static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100128show_##name (struct device *dev, struct device_attribute *attr, \
129 char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130{ \
Tony Jonesee959b02008-02-22 00:13:36 +0100131 struct Scsi_Host *shost = class_to_shost(dev); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 return snprintf (buf, 20, format_string, shost->field); \
133}
134
135/*
136 * shost_rd_attr: macro to create a function and attribute variable for a
137 * read only field.
138 */
139#define shost_rd_attr2(name, field, format_string) \
140 shost_show_function(name, field, format_string) \
Tony Jonesee959b02008-02-22 00:13:36 +0100141static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142
143#define shost_rd_attr(field, format_string) \
144shost_rd_attr2(field, field, format_string)
145
146/*
147 * Create the actual show/store functions and data structures.
148 */
149
Tony Jonesee959b02008-02-22 00:13:36 +0100150static ssize_t
151store_scan(struct device *dev, struct device_attribute *attr,
152 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153{
Tony Jonesee959b02008-02-22 00:13:36 +0100154 struct Scsi_Host *shost = class_to_shost(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 int res;
156
157 res = scsi_scan(shost, buf);
158 if (res == 0)
159 res = count;
160 return res;
161};
Tony Jonesee959b02008-02-22 00:13:36 +0100162static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163
Mike Andersond3301872005-06-16 11:12:38 -0700164static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100165store_shost_state(struct device *dev, struct device_attribute *attr,
166 const char *buf, size_t count)
Mike Andersond3301872005-06-16 11:12:38 -0700167{
168 int i;
Tony Jonesee959b02008-02-22 00:13:36 +0100169 struct Scsi_Host *shost = class_to_shost(dev);
Mike Andersond3301872005-06-16 11:12:38 -0700170 enum scsi_host_state state = 0;
171
Tobias Klauser6391a112006-06-08 22:23:48 -0700172 for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
Mike Andersond3301872005-06-16 11:12:38 -0700173 const int len = strlen(shost_states[i].name);
174 if (strncmp(shost_states[i].name, buf, len) == 0 &&
175 buf[len] == '\n') {
176 state = shost_states[i].value;
177 break;
178 }
179 }
180 if (!state)
181 return -EINVAL;
182
183 if (scsi_host_set_state(shost, state))
184 return -EINVAL;
185 return count;
186}
187
188static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100189show_shost_state(struct device *dev, struct device_attribute *attr, char *buf)
Mike Andersond3301872005-06-16 11:12:38 -0700190{
Tony Jonesee959b02008-02-22 00:13:36 +0100191 struct Scsi_Host *shost = class_to_shost(dev);
Mike Andersond3301872005-06-16 11:12:38 -0700192 const char *name = scsi_host_state_name(shost->shost_state);
193
194 if (!name)
195 return -EINVAL;
196
197 return snprintf(buf, 20, "%s\n", name);
198}
199
Tony Jonesee959b02008-02-22 00:13:36 +0100200/* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */
201struct device_attribute dev_attr_hstate =
202 __ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state);
Mike Andersond3301872005-06-16 11:12:38 -0700203
FUJITA Tomonori5dc2b892007-09-01 02:02:20 +0900204static ssize_t
205show_shost_mode(unsigned int mode, char *buf)
206{
207 ssize_t len = 0;
208
209 if (mode & MODE_INITIATOR)
210 len = sprintf(buf, "%s", "Initiator");
211
212 if (mode & MODE_TARGET)
213 len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target");
214
215 len += sprintf(buf + len, "\n");
216
217 return len;
218}
219
Tony Jonesee959b02008-02-22 00:13:36 +0100220static ssize_t
221show_shost_supported_mode(struct device *dev, struct device_attribute *attr,
222 char *buf)
FUJITA Tomonori5dc2b892007-09-01 02:02:20 +0900223{
Tony Jonesee959b02008-02-22 00:13:36 +0100224 struct Scsi_Host *shost = class_to_shost(dev);
James Bottomley7a39ac32007-09-25 22:45:53 -0500225 unsigned int supported_mode = shost->hostt->supported_mode;
FUJITA Tomonori5dc2b892007-09-01 02:02:20 +0900226
James Bottomley7a39ac32007-09-25 22:45:53 -0500227 if (supported_mode == MODE_UNKNOWN)
228 /* by default this should be initiator */
229 supported_mode = MODE_INITIATOR;
230
231 return show_shost_mode(supported_mode, buf);
FUJITA Tomonori5dc2b892007-09-01 02:02:20 +0900232}
233
Tony Jonesee959b02008-02-22 00:13:36 +0100234static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL);
FUJITA Tomonori5dc2b892007-09-01 02:02:20 +0900235
Tony Jonesee959b02008-02-22 00:13:36 +0100236static ssize_t
237show_shost_active_mode(struct device *dev,
238 struct device_attribute *attr, char *buf)
FUJITA Tomonori5dc2b892007-09-01 02:02:20 +0900239{
Tony Jonesee959b02008-02-22 00:13:36 +0100240 struct Scsi_Host *shost = class_to_shost(dev);
FUJITA Tomonori5dc2b892007-09-01 02:02:20 +0900241
242 if (shost->active_mode == MODE_UNKNOWN)
243 return snprintf(buf, 20, "unknown\n");
244 else
245 return show_shost_mode(shost->active_mode, buf);
246}
247
Tony Jonesee959b02008-02-22 00:13:36 +0100248static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL);
FUJITA Tomonori5dc2b892007-09-01 02:02:20 +0900249
Sasha Levin072f19b2012-11-15 15:51:46 -0500250static int check_reset_type(const char *str)
Vikas Chaudhary29443692011-08-12 02:51:28 -0700251{
Sasha Levin072f19b2012-11-15 15:51:46 -0500252 if (sysfs_streq(str, "adapter"))
Vikas Chaudhary29443692011-08-12 02:51:28 -0700253 return SCSI_ADAPTER_RESET;
Sasha Levin072f19b2012-11-15 15:51:46 -0500254 else if (sysfs_streq(str, "firmware"))
Vikas Chaudhary29443692011-08-12 02:51:28 -0700255 return SCSI_FIRMWARE_RESET;
256 else
257 return 0;
258}
259
260static ssize_t
261store_host_reset(struct device *dev, struct device_attribute *attr,
262 const char *buf, size_t count)
263{
264 struct Scsi_Host *shost = class_to_shost(dev);
265 struct scsi_host_template *sht = shost->hostt;
266 int ret = -EINVAL;
Vikas Chaudhary29443692011-08-12 02:51:28 -0700267 int type;
268
Sasha Levin072f19b2012-11-15 15:51:46 -0500269 type = check_reset_type(buf);
Vikas Chaudhary29443692011-08-12 02:51:28 -0700270 if (!type)
271 goto exit_store_host_reset;
272
273 if (sht->host_reset)
274 ret = sht->host_reset(shost, type);
275
276exit_store_host_reset:
277 if (ret == 0)
278 ret = count;
279 return ret;
280}
281
282static DEVICE_ATTR(host_reset, S_IWUSR, NULL, store_host_reset);
283
Hannes Reineckeb4562022013-10-23 10:51:21 +0200284static ssize_t
285show_shost_eh_deadline(struct device *dev,
286 struct device_attribute *attr, char *buf)
287{
288 struct Scsi_Host *shost = class_to_shost(dev);
289
Ren Mingxinbb3b6212013-11-11 13:44:56 +0100290 if (shost->eh_deadline == -1)
291 return snprintf(buf, strlen("off") + 2, "off\n");
292 return sprintf(buf, "%u\n", shost->eh_deadline / HZ);
Hannes Reineckeb4562022013-10-23 10:51:21 +0200293}
294
295static ssize_t
296store_shost_eh_deadline(struct device *dev, struct device_attribute *attr,
297 const char *buf, size_t count)
298{
299 struct Scsi_Host *shost = class_to_shost(dev);
300 int ret = -EINVAL;
Ren Mingxinbb3b6212013-11-11 13:44:56 +0100301 unsigned long deadline, flags;
Hannes Reineckeb4562022013-10-23 10:51:21 +0200302
Hannes Reineckead469a52014-01-17 16:05:38 +0100303 if (shost->transportt &&
304 (shost->transportt->eh_strategy_handler ||
305 !shost->hostt->eh_host_reset_handler))
Hannes Reineckeb4562022013-10-23 10:51:21 +0200306 return ret;
307
Ren Mingxinbb3b6212013-11-11 13:44:56 +0100308 if (!strncmp(buf, "off", strlen("off")))
309 deadline = -1;
310 else {
311 ret = kstrtoul(buf, 10, &deadline);
312 if (ret)
313 return ret;
314 if (deadline * HZ > UINT_MAX)
315 return -EINVAL;
Hannes Reineckeb4562022013-10-23 10:51:21 +0200316 }
Ren Mingxinbb3b6212013-11-11 13:44:56 +0100317
318 spin_lock_irqsave(shost->host_lock, flags);
319 if (scsi_host_in_recovery(shost))
320 ret = -EBUSY;
321 else {
322 if (deadline == -1)
323 shost->eh_deadline = -1;
324 else
325 shost->eh_deadline = deadline * HZ;
326
327 ret = count;
328 }
329 spin_unlock_irqrestore(shost->host_lock, flags);
330
Hannes Reineckeb4562022013-10-23 10:51:21 +0200331 return ret;
332}
333
334static DEVICE_ATTR(eh_deadline, S_IRUGO | S_IWUSR, show_shost_eh_deadline, store_shost_eh_deadline);
335
Christoph Hellwigd2852032014-01-17 12:06:53 +0100336shost_rd_attr(use_blk_mq, "%d\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337shost_rd_attr(unique_id, "%u\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338shost_rd_attr(cmd_per_lun, "%hd\n");
James Bottomleyed632da2006-10-16 10:06:27 -0500339shost_rd_attr(can_queue, "%hd\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340shost_rd_attr(sg_tablesize, "%hu\n");
Martin K. Petersen13f05c82010-09-10 20:50:10 +0200341shost_rd_attr(sg_prot_tablesize, "%hu\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342shost_rd_attr(unchecked_isa_dma, "%d\n");
Martin K. Petersen4469f982008-07-17 04:28:30 -0400343shost_rd_attr(prot_capabilities, "%u\n");
344shost_rd_attr(prot_guard_type, "%hd\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345shost_rd_attr2(proc_name, hostt->proc_name, "%s\n");
346
Christoph Hellwig74665012014-01-22 15:29:29 +0100347static ssize_t
348show_host_busy(struct device *dev, struct device_attribute *attr, char *buf)
349{
350 struct Scsi_Host *shost = class_to_shost(dev);
351 return snprintf(buf, 20, "%d\n", atomic_read(&shost->host_busy));
352}
353static DEVICE_ATTR(host_busy, S_IRUGO, show_host_busy, NULL);
354
Hannes Reineckef7120a42008-03-18 14:32:28 +0100355static struct attribute *scsi_sysfs_shost_attrs[] = {
Christoph Hellwigd2852032014-01-17 12:06:53 +0100356 &dev_attr_use_blk_mq.attr,
Hannes Reineckef7120a42008-03-18 14:32:28 +0100357 &dev_attr_unique_id.attr,
358 &dev_attr_host_busy.attr,
359 &dev_attr_cmd_per_lun.attr,
360 &dev_attr_can_queue.attr,
361 &dev_attr_sg_tablesize.attr,
Martin K. Petersen13f05c82010-09-10 20:50:10 +0200362 &dev_attr_sg_prot_tablesize.attr,
Hannes Reineckef7120a42008-03-18 14:32:28 +0100363 &dev_attr_unchecked_isa_dma.attr,
364 &dev_attr_proc_name.attr,
365 &dev_attr_scan.attr,
366 &dev_attr_hstate.attr,
367 &dev_attr_supported_mode.attr,
368 &dev_attr_active_mode.attr,
Martin K. Petersen4469f982008-07-17 04:28:30 -0400369 &dev_attr_prot_capabilities.attr,
370 &dev_attr_prot_guard_type.attr,
Vikas Chaudhary29443692011-08-12 02:51:28 -0700371 &dev_attr_host_reset.attr,
Hannes Reineckeb4562022013-10-23 10:51:21 +0200372 &dev_attr_eh_deadline.attr,
Hannes Reineckef7120a42008-03-18 14:32:28 +0100373 NULL
374};
375
376struct attribute_group scsi_shost_attr_group = {
377 .attrs = scsi_sysfs_shost_attrs,
378};
379
David Brownella4dbd672009-06-24 10:06:31 -0700380const struct attribute_group *scsi_sysfs_shost_attr_groups[] = {
Hannes Reineckef7120a42008-03-18 14:32:28 +0100381 &scsi_shost_attr_group,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 NULL
383};
384
Tony Jonesee959b02008-02-22 00:13:36 +0100385static void scsi_device_cls_release(struct device *class_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386{
387 struct scsi_device *sdev;
388
389 sdev = class_to_sdev(class_dev);
390 put_device(&sdev->sdev_gendev);
391}
392
David Howells65f27f32006-11-22 14:55:48 +0000393static void scsi_device_dev_release_usercontext(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394{
395 struct scsi_device *sdev;
396 struct device *parent;
Jeff Garzika341cd02007-10-29 17:15:22 -0400397 struct list_head *this, *tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 unsigned long flags;
399
David Howells65f27f32006-11-22 14:55:48 +0000400 sdev = container_of(work, struct scsi_device, ew.work);
401
402 parent = sdev->sdev_gendev.parent;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403
404 spin_lock_irqsave(sdev->host->host_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 list_del(&sdev->siblings);
406 list_del(&sdev->same_target_siblings);
407 list_del(&sdev->starved_entry);
408 spin_unlock_irqrestore(sdev->host->host_lock, flags);
409
Jeff Garzika341cd02007-10-29 17:15:22 -0400410 cancel_work_sync(&sdev->event_work);
411
412 list_for_each_safe(this, tmp, &sdev->event_list) {
413 struct scsi_event *evt;
414
415 evt = list_entry(this, struct scsi_event, node);
416 list_del(&evt->node);
417 kfree(evt);
418 }
419
James Bottomleye73e0792011-05-25 15:52:14 -0500420 blk_put_queue(sdev->request_queue);
James Bottomley86cbfb52011-04-22 10:39:59 -0500421 /* NULL queue means the device can't be used */
422 sdev->request_queue = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423
Hannes Reineckeb3ae8782014-03-15 09:51:49 +0100424 kfree(sdev->vpd_pg83);
425 kfree(sdev->vpd_pg80);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 kfree(sdev->inquiry);
427 kfree(sdev);
428
429 if (parent)
430 put_device(parent);
431}
432
James Bottomley65110b22006-02-14 10:48:46 -0600433static void scsi_device_dev_release(struct device *dev)
434{
James Bottomleyffedb452006-02-23 14:27:18 -0600435 struct scsi_device *sdp = to_scsi_device(dev);
David Howells65f27f32006-11-22 14:55:48 +0000436 execute_in_process_context(scsi_device_dev_release_usercontext,
James Bottomleyffedb452006-02-23 14:27:18 -0600437 &sdp->ew);
James Bottomley65110b22006-02-14 10:48:46 -0600438}
439
Adrian Bunk52c1da32005-06-23 22:05:33 -0700440static struct class sdev_class = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 .name = "scsi_device",
Tony Jonesee959b02008-02-22 00:13:36 +0100442 .dev_release = scsi_device_cls_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443};
444
445/* all probing is done in the individual ->probe routines */
446static int scsi_bus_match(struct device *dev, struct device_driver *gendrv)
447{
Hannes Reineckeb0ed4332008-03-18 14:32:28 +0100448 struct scsi_device *sdp;
449
450 if (dev->type != &scsi_dev_type)
451 return 0;
452
453 sdp = to_scsi_device(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 if (sdp->no_uld_attach)
455 return 0;
456 return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0;
457}
458
Kay Sievers7eff2e72007-08-14 15:15:12 +0200459static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
Michael Tokarevd7b8bcb2006-10-27 16:02:37 +0400460{
James Bottomley1f42ea72008-05-22 12:34:41 +0100461 struct scsi_device *sdev;
462
463 if (dev->type != &scsi_dev_type)
464 return 0;
465
466 sdev = to_scsi_device(dev);
Michael Tokarevd7b8bcb2006-10-27 16:02:37 +0400467
Kay Sievers7eff2e72007-08-14 15:15:12 +0200468 add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type);
Michael Tokarevd7b8bcb2006-10-27 16:02:37 +0400469 return 0;
470}
471
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472struct bus_type scsi_bus_type = {
473 .name = "scsi",
474 .match = scsi_bus_match,
Michael Tokarevd7b8bcb2006-10-27 16:02:37 +0400475 .uevent = scsi_bus_uevent,
Rafael J. Wysockiaa338602011-02-11 00:06:54 +0100476#ifdef CONFIG_PM
Alan Sterndb5bd1e2010-06-17 10:36:49 -0400477 .pm = &scsi_bus_pm_ops,
Alan Sterne6da54d2010-08-05 13:17:10 -0400478#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479};
Chandra Seetharamana6a8d9f2008-05-01 14:49:46 -0700480EXPORT_SYMBOL_GPL(scsi_bus_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481
482int scsi_sysfs_register(void)
483{
484 int error;
485
486 error = bus_register(&scsi_bus_type);
487 if (!error) {
488 error = class_register(&sdev_class);
489 if (error)
490 bus_unregister(&scsi_bus_type);
491 }
492
493 return error;
494}
495
496void scsi_sysfs_unregister(void)
497{
498 class_unregister(&sdev_class);
499 bus_unregister(&scsi_bus_type);
500}
501
502/*
503 * sdev_show_function: macro to create an attr function that can be used to
504 * show a non-bit field.
505 */
506#define sdev_show_function(field, format_string) \
507static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100508sdev_show_##field (struct device *dev, struct device_attribute *attr, \
509 char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510{ \
511 struct scsi_device *sdev; \
512 sdev = to_scsi_device(dev); \
513 return snprintf (buf, 20, format_string, sdev->field); \
514} \
515
516/*
517 * sdev_rd_attr: macro to create a function and attribute variable for a
518 * read only field.
519 */
520#define sdev_rd_attr(field, format_string) \
521 sdev_show_function(field, format_string) \
522static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL);
523
524
525/*
Tomohiro Kusumi160e7f62010-04-14 15:15:14 +0900526 * sdev_rw_attr: create a function and attribute variable for a
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527 * read/write field.
528 */
529#define sdev_rw_attr(field, format_string) \
530 sdev_show_function(field, format_string) \
531 \
532static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100533sdev_store_##field (struct device *dev, struct device_attribute *attr, \
534 const char *buf, size_t count) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535{ \
536 struct scsi_device *sdev; \
537 sdev = to_scsi_device(dev); \
Tomohiro Kusumi160e7f62010-04-14 15:15:14 +0900538 sscanf (buf, format_string, &sdev->field); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 return count; \
540} \
541static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
542
543/* Currently we don't export bit fields, but we might in future,
544 * so leave this code in */
545#if 0
546/*
547 * sdev_rd_attr: create a function and attribute variable for a
548 * read/write bit field.
549 */
550#define sdev_rw_attr_bit(field) \
551 sdev_show_function(field, "%d\n") \
552 \
553static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100554sdev_store_##field (struct device *dev, struct device_attribute *attr, \
555 const char *buf, size_t count) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556{ \
557 int ret; \
558 struct scsi_device *sdev; \
559 ret = scsi_sdev_check_buf_bit(buf); \
560 if (ret >= 0) { \
561 sdev = to_scsi_device(dev); \
562 sdev->field = ret; \
563 ret = count; \
564 } \
565 return ret; \
566} \
567static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
568
569/*
570 * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1",
571 * else return -EINVAL.
572 */
573static int scsi_sdev_check_buf_bit(const char *buf)
574{
575 if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
576 if (buf[0] == '1')
577 return 1;
578 else if (buf[0] == '0')
579 return 0;
580 else
581 return -EINVAL;
582 } else
583 return -EINVAL;
584}
585#endif
586/*
587 * Create the actual show/store functions and data structures.
588 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589sdev_rd_attr (type, "%d\n");
590sdev_rd_attr (scsi_level, "%d\n");
591sdev_rd_attr (vendor, "%.8s\n");
592sdev_rd_attr (model, "%.16s\n");
593sdev_rd_attr (rev, "%.4s\n");
594
Christoph Hellwig71e75c92014-04-11 19:07:01 +0200595static ssize_t
596sdev_show_device_busy(struct device *dev, struct device_attribute *attr,
597 char *buf)
598{
599 struct scsi_device *sdev = to_scsi_device(dev);
600 return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_busy));
601}
602static DEVICE_ATTR(device_busy, S_IRUGO, sdev_show_device_busy, NULL);
603
Christoph Hellwigcd9070c2014-01-23 12:07:41 +0100604static ssize_t
605sdev_show_device_blocked(struct device *dev, struct device_attribute *attr,
606 char *buf)
607{
608 struct scsi_device *sdev = to_scsi_device(dev);
609 return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_blocked));
610}
611static DEVICE_ATTR(device_blocked, S_IRUGO, sdev_show_device_blocked, NULL);
612
Jens Axboe242f9dc2008-09-14 05:55:09 -0700613/*
614 * TODO: can we make these symlinks to the block layer ones?
615 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616static ssize_t
Yani Ioannou10523b32005-05-17 06:43:37 -0400617sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618{
619 struct scsi_device *sdev;
620 sdev = to_scsi_device(dev);
Jens Axboe242f9dc2008-09-14 05:55:09 -0700621 return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622}
623
624static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100625sdev_store_timeout (struct device *dev, struct device_attribute *attr,
626 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627{
628 struct scsi_device *sdev;
629 int timeout;
630 sdev = to_scsi_device(dev);
631 sscanf (buf, "%d\n", &timeout);
Jens Axboe242f9dc2008-09-14 05:55:09 -0700632 blk_queue_rq_timeout(sdev->request_queue, timeout * HZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 return count;
634}
635static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout);
636
637static ssize_t
Martin K. Petersen0816c922013-05-10 10:36:04 -0400638sdev_show_eh_timeout(struct device *dev, struct device_attribute *attr, char *buf)
639{
640 struct scsi_device *sdev;
641 sdev = to_scsi_device(dev);
642 return snprintf(buf, 20, "%u\n", sdev->eh_timeout / HZ);
643}
644
645static ssize_t
646sdev_store_eh_timeout(struct device *dev, struct device_attribute *attr,
647 const char *buf, size_t count)
648{
649 struct scsi_device *sdev;
650 unsigned int eh_timeout;
651 int err;
652
653 if (!capable(CAP_SYS_ADMIN))
654 return -EACCES;
655
656 sdev = to_scsi_device(dev);
657 err = kstrtouint(buf, 10, &eh_timeout);
658 if (err)
659 return err;
660 sdev->eh_timeout = eh_timeout * HZ;
661
662 return count;
663}
664static DEVICE_ATTR(eh_timeout, S_IRUGO | S_IWUSR, sdev_show_eh_timeout, sdev_store_eh_timeout);
665
666static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100667store_rescan_field (struct device *dev, struct device_attribute *attr,
668 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669{
670 scsi_rescan_device(dev);
671 return count;
672}
673static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field);
674
Tony Jonesee959b02008-02-22 00:13:36 +0100675static ssize_t
676sdev_store_delete(struct device *dev, struct device_attribute *attr,
677 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678{
Tejun Heoac0ece92014-02-03 14:03:03 -0500679 if (device_remove_file_self(dev, attr))
680 scsi_remove_device(to_scsi_device(dev));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681 return count;
682};
683static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete);
684
685static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100686store_state_field(struct device *dev, struct device_attribute *attr,
687 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688{
689 int i;
690 struct scsi_device *sdev = to_scsi_device(dev);
691 enum scsi_device_state state = 0;
692
Tobias Klauser6391a112006-06-08 22:23:48 -0700693 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 const int len = strlen(sdev_states[i].name);
695 if (strncmp(sdev_states[i].name, buf, len) == 0 &&
696 buf[len] == '\n') {
697 state = sdev_states[i].value;
698 break;
699 }
700 }
701 if (!state)
702 return -EINVAL;
703
704 if (scsi_device_set_state(sdev, state))
705 return -EINVAL;
706 return count;
707}
708
709static ssize_t
Yani Ioannou10523b32005-05-17 06:43:37 -0400710show_state_field(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711{
712 struct scsi_device *sdev = to_scsi_device(dev);
713 const char *name = scsi_device_state_name(sdev->sdev_state);
714
715 if (!name)
716 return -EINVAL;
717
718 return snprintf(buf, 20, "%s\n", name);
719}
720
721static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field);
722
723static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100724show_queue_type_field(struct device *dev, struct device_attribute *attr,
725 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726{
727 struct scsi_device *sdev = to_scsi_device(dev);
728 const char *name = "none";
729
Christoph Hellwig609aa222014-10-30 11:54:58 +0100730 if (sdev->simple_tags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 name = "simple";
732
733 return snprintf(buf, 20, "%s\n", name);
734}
735
Hannes Reinecke276b20d2014-03-15 09:51:47 +0100736static ssize_t
737store_queue_type_field(struct device *dev, struct device_attribute *attr,
738 const char *buf, size_t count)
739{
740 struct scsi_device *sdev = to_scsi_device(dev);
Hannes Reinecke276b20d2014-03-15 09:51:47 +0100741
Christoph Hellwigefc3c1d2014-11-24 15:36:18 +0100742 if (!sdev->tagged_supported)
Hannes Reinecke276b20d2014-03-15 09:51:47 +0100743 return -EINVAL;
Christoph Hellwigefc3c1d2014-11-24 15:36:18 +0100744
745 sdev_printk(KERN_INFO, sdev,
746 "ignoring write to deprecated queue_type attribute");
Hannes Reinecke276b20d2014-03-15 09:51:47 +0100747 return count;
748}
749
750static DEVICE_ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field,
751 store_queue_type_field);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752
Hannes Reineckeb3ae8782014-03-15 09:51:49 +0100753#define sdev_vpd_pg_attr(_page) \
754static ssize_t \
755show_vpd_##_page(struct file *filp, struct kobject *kobj, \
756 struct bin_attribute *bin_attr, \
757 char *buf, loff_t off, size_t count) \
758{ \
759 struct device *dev = container_of(kobj, struct device, kobj); \
760 struct scsi_device *sdev = to_scsi_device(dev); \
761 if (!sdev->vpd_##_page) \
762 return -EINVAL; \
763 return memory_read_from_buffer(buf, count, &off, \
764 sdev->vpd_##_page, \
765 sdev->vpd_##_page##_len); \
766} \
767static struct bin_attribute dev_attr_vpd_##_page = { \
768 .attr = {.name = __stringify(vpd_##_page), .mode = S_IRUGO }, \
769 .size = 0, \
770 .read = show_vpd_##_page, \
771};
772
773sdev_vpd_pg_attr(pg83);
774sdev_vpd_pg_attr(pg80);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775
776static ssize_t
Hannes Reineckeb3ae8782014-03-15 09:51:49 +0100777show_iostat_counterbits(struct device *dev, struct device_attribute *attr,
778 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779{
780 return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8);
781}
782
783static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL);
784
785#define show_sdev_iostat(field) \
786static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100787show_iostat_##field(struct device *dev, struct device_attribute *attr, \
788 char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789{ \
790 struct scsi_device *sdev = to_scsi_device(dev); \
791 unsigned long long count = atomic_read(&sdev->field); \
792 return snprintf(buf, 20, "0x%llx\n", count); \
793} \
794static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL)
795
796show_sdev_iostat(iorequest_cnt);
797show_sdev_iostat(iodone_cnt);
798show_sdev_iostat(ioerr_cnt);
799
Michael Tokarevd7b8bcb2006-10-27 16:02:37 +0400800static ssize_t
801sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
802{
803 struct scsi_device *sdev;
804 sdev = to_scsi_device(dev);
805 return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type);
806}
807static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808
Jeff Garzika341cd02007-10-29 17:15:22 -0400809#define DECLARE_EVT_SHOW(name, Cap_name) \
810static ssize_t \
811sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \
Tony Jonesee959b02008-02-22 00:13:36 +0100812 char *buf) \
Jeff Garzika341cd02007-10-29 17:15:22 -0400813{ \
814 struct scsi_device *sdev = to_scsi_device(dev); \
815 int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\
816 return snprintf(buf, 20, "%d\n", val); \
817}
818
819#define DECLARE_EVT_STORE(name, Cap_name) \
820static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100821sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\
Jeff Garzika341cd02007-10-29 17:15:22 -0400822 const char *buf, size_t count) \
823{ \
824 struct scsi_device *sdev = to_scsi_device(dev); \
825 int val = simple_strtoul(buf, NULL, 0); \
826 if (val == 0) \
827 clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
828 else if (val == 1) \
829 set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
830 else \
831 return -EINVAL; \
832 return count; \
833}
834
835#define DECLARE_EVT(name, Cap_name) \
836 DECLARE_EVT_SHOW(name, Cap_name) \
837 DECLARE_EVT_STORE(name, Cap_name) \
838 static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \
839 sdev_store_evt_##name);
840#define REF_EVT(name) &dev_attr_evt_##name.attr
841
842DECLARE_EVT(media_change, MEDIA_CHANGE)
Ewan D. Milne279afdf2013-08-08 15:07:48 -0400843DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED)
844DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED)
845DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED)
846DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED)
847DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED)
Jeff Garzika341cd02007-10-29 17:15:22 -0400848
Tony Jonesee959b02008-02-22 00:13:36 +0100849static ssize_t
Hannes Reinecke276b20d2014-03-15 09:51:47 +0100850sdev_store_queue_depth(struct device *dev, struct device_attribute *attr,
851 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852{
853 int depth, retval;
854 struct scsi_device *sdev = to_scsi_device(dev);
855 struct scsi_host_template *sht = sdev->host->hostt;
856
857 if (!sht->change_queue_depth)
858 return -EINVAL;
859
860 depth = simple_strtoul(buf, NULL, 0);
861
Jens Axboe1278dd62015-07-13 08:24:39 -0600862 if (depth < 1 || depth > sdev->host->can_queue)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863 return -EINVAL;
864
Christoph Hellwigdb5ed4d2014-11-13 15:08:42 +0100865 retval = sht->change_queue_depth(sdev, depth);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 if (retval < 0)
867 return retval;
868
Vasu Dev4a840672009-10-22 15:46:33 -0700869 sdev->max_queue_depth = sdev->queue_depth;
870
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871 return count;
872}
Hannes Reinecke276b20d2014-03-15 09:51:47 +0100873sdev_show_function(queue_depth, "%d\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874
Hannes Reinecke276b20d2014-03-15 09:51:47 +0100875static DEVICE_ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth,
876 sdev_store_queue_depth);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877
Tony Jonesee959b02008-02-22 00:13:36 +0100878static ssize_t
Vasu Dev4a840672009-10-22 15:46:33 -0700879sdev_show_queue_ramp_up_period(struct device *dev,
880 struct device_attribute *attr,
881 char *buf)
882{
883 struct scsi_device *sdev;
884 sdev = to_scsi_device(dev);
885 return snprintf(buf, 20, "%u\n",
886 jiffies_to_msecs(sdev->queue_ramp_up_period));
887}
888
889static ssize_t
890sdev_store_queue_ramp_up_period(struct device *dev,
891 struct device_attribute *attr,
892 const char *buf, size_t count)
893{
894 struct scsi_device *sdev = to_scsi_device(dev);
Daniel Walterf7c65af2014-08-08 14:24:05 -0700895 unsigned int period;
Vasu Dev4a840672009-10-22 15:46:33 -0700896
Daniel Walterf7c65af2014-08-08 14:24:05 -0700897 if (kstrtouint(buf, 10, &period))
Vasu Dev4a840672009-10-22 15:46:33 -0700898 return -EINVAL;
899
900 sdev->queue_ramp_up_period = msecs_to_jiffies(period);
901 return period;
902}
903
Hannes Reinecke276b20d2014-03-15 09:51:47 +0100904static DEVICE_ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR,
905 sdev_show_queue_ramp_up_period,
906 sdev_store_queue_ramp_up_period);
Vasu Dev4a840672009-10-22 15:46:33 -0700907
Hannes Reinecke276b20d2014-03-15 09:51:47 +0100908static umode_t scsi_sdev_attr_is_visible(struct kobject *kobj,
909 struct attribute *attr, int i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910{
Hannes Reinecke276b20d2014-03-15 09:51:47 +0100911 struct device *dev = container_of(kobj, struct device, kobj);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912 struct scsi_device *sdev = to_scsi_device(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914
Hannes Reinecke276b20d2014-03-15 09:51:47 +0100915 if (attr == &dev_attr_queue_depth.attr &&
916 !sdev->host->hostt->change_queue_depth)
917 return S_IRUGO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918
Hannes Reinecke276b20d2014-03-15 09:51:47 +0100919 if (attr == &dev_attr_queue_ramp_up_period.attr &&
920 !sdev->host->hostt->change_queue_depth)
921 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922
Hannes Reinecke276b20d2014-03-15 09:51:47 +0100923 return attr->mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924}
925
Hannes Reinecke276b20d2014-03-15 09:51:47 +0100926/* Default template for device attributes. May NOT be modified */
927static struct attribute *scsi_sdev_attrs[] = {
928 &dev_attr_device_blocked.attr,
929 &dev_attr_type.attr,
930 &dev_attr_scsi_level.attr,
931 &dev_attr_device_busy.attr,
932 &dev_attr_vendor.attr,
933 &dev_attr_model.attr,
934 &dev_attr_rev.attr,
935 &dev_attr_rescan.attr,
936 &dev_attr_delete.attr,
937 &dev_attr_state.attr,
938 &dev_attr_timeout.attr,
939 &dev_attr_eh_timeout.attr,
940 &dev_attr_iocounterbits.attr,
941 &dev_attr_iorequest_cnt.attr,
942 &dev_attr_iodone_cnt.attr,
943 &dev_attr_ioerr_cnt.attr,
944 &dev_attr_modalias.attr,
945 &dev_attr_queue_depth.attr,
946 &dev_attr_queue_type.attr,
947 &dev_attr_queue_ramp_up_period.attr,
948 REF_EVT(media_change),
949 REF_EVT(inquiry_change_reported),
950 REF_EVT(capacity_change_reported),
951 REF_EVT(soft_threshold_reached),
952 REF_EVT(mode_parameter_change_reported),
953 REF_EVT(lun_change_reported),
954 NULL
955};
956
Hannes Reineckeb3ae8782014-03-15 09:51:49 +0100957static struct bin_attribute *scsi_sdev_bin_attrs[] = {
958 &dev_attr_vpd_pg83,
959 &dev_attr_vpd_pg80,
960 NULL
961};
Hannes Reinecke276b20d2014-03-15 09:51:47 +0100962static struct attribute_group scsi_sdev_attr_group = {
963 .attrs = scsi_sdev_attrs,
Hannes Reineckeb3ae8782014-03-15 09:51:49 +0100964 .bin_attrs = scsi_sdev_bin_attrs,
Hannes Reinecke276b20d2014-03-15 09:51:47 +0100965 .is_visible = scsi_sdev_attr_is_visible,
966};
967
968static const struct attribute_group *scsi_sdev_attr_groups[] = {
969 &scsi_sdev_attr_group,
970 NULL
971};
972
James Bottomley643eb2d2008-03-22 22:42:27 -0500973static int scsi_target_add(struct scsi_target *starget)
974{
975 int error;
976
977 if (starget->state != STARGET_CREATED)
978 return 0;
979
980 error = device_add(&starget->dev);
981 if (error) {
982 dev_err(&starget->dev, "target device_add failed, error %d\n", error);
James Bottomley643eb2d2008-03-22 22:42:27 -0500983 return error;
984 }
985 transport_add_device(&starget->dev);
986 starget->state = STARGET_RUNNING;
987
Alan Sternbc4f2402010-06-17 10:41:42 -0400988 pm_runtime_set_active(&starget->dev);
989 pm_runtime_enable(&starget->dev);
990 device_enable_async_suspend(&starget->dev);
991
James Bottomley643eb2d2008-03-22 22:42:27 -0500992 return 0;
993}
994
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995/**
996 * scsi_sysfs_add_sdev - add scsi device to sysfs
997 * @sdev: scsi_device to add
998 *
999 * Return value:
1000 * 0 on Success / non-zero on Failure
1001 **/
1002int scsi_sysfs_add_sdev(struct scsi_device *sdev)
1003{
1004 int error, i;
James Bottomley80ed71c2007-07-19 10:15:10 -05001005 struct request_queue *rq = sdev->request_queue;
James Bottomley643eb2d2008-03-22 22:42:27 -05001006 struct scsi_target *starget = sdev->sdev_target;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007
Alan Sternee37e092010-02-12 12:13:55 -05001008 error = scsi_device_set_state(sdev, SDEV_RUNNING);
1009 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010 return error;
1011
James Bottomley643eb2d2008-03-22 22:42:27 -05001012 error = scsi_target_add(starget);
1013 if (error)
1014 return error;
1015
1016 transport_configure_device(&starget->dev);
Alan Sternbc4f2402010-06-17 10:41:42 -04001017
Rafael J. Wysocki4cb077d2010-02-08 19:18:26 +01001018 device_enable_async_suspend(&sdev->sdev_gendev);
Alan Sternbc4f2402010-06-17 10:41:42 -04001019 scsi_autopm_get_target(starget);
1020 pm_runtime_set_active(&sdev->sdev_gendev);
1021 pm_runtime_forbid(&sdev->sdev_gendev);
1022 pm_runtime_enable(&sdev->sdev_gendev);
1023 scsi_autopm_put_target(starget);
1024
Alan Sternbc4f2402010-06-17 10:41:42 -04001025 scsi_autopm_get_device(sdev);
1026
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027 error = device_add(&sdev->sdev_gendev);
1028 if (error) {
Alan Stern73d8c342010-11-15 16:03:04 -05001029 sdev_printk(KERN_INFO, sdev,
1030 "failed to add device: %d\n", error);
Alan Sternee37e092010-02-12 12:13:55 -05001031 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032 }
Christoph Hellwig086b91d2015-08-27 14:16:57 +02001033
1034 error = scsi_dh_add_device(sdev);
1035 if (error) {
1036 sdev_printk(KERN_INFO, sdev,
1037 "failed to add device handler: %d\n", error);
1038 return error;
1039 }
1040
Rafael J. Wysocki4cb077d2010-02-08 19:18:26 +01001041 device_enable_async_suspend(&sdev->sdev_dev);
Tony Jonesee959b02008-02-22 00:13:36 +01001042 error = device_add(&sdev->sdev_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043 if (error) {
Alan Stern73d8c342010-11-15 16:03:04 -05001044 sdev_printk(KERN_INFO, sdev,
1045 "failed to add class device: %d\n", error);
Christoph Hellwig086b91d2015-08-27 14:16:57 +02001046 scsi_dh_remove_device(sdev);
James Bottomley860dc732009-11-19 17:48:29 -05001047 device_del(&sdev->sdev_gendev);
Alan Sternee37e092010-02-12 12:13:55 -05001048 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049 }
James Bottomley860dc732009-11-19 17:48:29 -05001050 transport_add_device(&sdev->sdev_gendev);
1051 sdev->is_visible = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052
FUJITA Tomonori97f46ae2008-04-19 00:43:14 +09001053 error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL);
James Bottomley80ed71c2007-07-19 10:15:10 -05001054
1055 if (error)
James Bottomley860dc732009-11-19 17:48:29 -05001056 /* we're treating error on bsg register as non-fatal,
1057 * so pretend nothing went wrong */
James Bottomley80ed71c2007-07-19 10:15:10 -05001058 sdev_printk(KERN_INFO, sdev,
1059 "Failed to register bsg queue, errno=%d\n", error);
1060
Kay Sieversbfd12942007-09-11 17:00:14 +02001061 /* add additional host specific attributes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062 if (sdev->host->hostt->sdev_attrs) {
1063 for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) {
Kay Sieversbfd12942007-09-11 17:00:14 +02001064 error = device_create_file(&sdev->sdev_gendev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065 sdev->host->hostt->sdev_attrs[i]);
James Bottomley860dc732009-11-19 17:48:29 -05001066 if (error)
Alan Sternee37e092010-02-12 12:13:55 -05001067 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068 }
1069 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070
Subhash Jadavani6fe8c1d2014-09-10 14:54:09 +03001071 scsi_autopm_put_device(sdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073}
1074
Alan Stern903f4fe2005-07-26 10:20:53 -04001075void __scsi_remove_device(struct scsi_device *sdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076{
James Bottomleydf133c22005-11-06 11:47:08 -06001077 struct device *dev = &sdev->sdev_gendev;
1078
James Bottomley860dc732009-11-19 17:48:29 -05001079 if (sdev->is_visible) {
1080 if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0)
1081 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082
James Bottomley860dc732009-11-19 17:48:29 -05001083 bsg_unregister_queue(sdev->request_queue);
1084 device_unregister(&sdev->sdev_dev);
1085 transport_remove_device(dev);
Christoph Hellwig086b91d2015-08-27 14:16:57 +02001086 scsi_dh_remove_device(sdev);
James Bottomley860dc732009-11-19 17:48:29 -05001087 device_del(dev);
1088 } else
1089 put_device(&sdev->sdev_dev);
Bart Van Asscheb4854622012-06-29 15:36:07 +00001090
1091 /*
1092 * Stop accepting new requests and wait until all queuecommand() and
1093 * scsi_run_queue() invocations have finished before tearing down the
1094 * device.
1095 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096 scsi_device_set_state(sdev, SDEV_DEL);
Bart Van Asscheb4854622012-06-29 15:36:07 +00001097 blk_cleanup_queue(sdev->request_queue);
1098 cancel_work_sync(&sdev->requeue_work);
1099
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100 if (sdev->host->hostt->slave_destroy)
1101 sdev->host->hostt->slave_destroy(sdev);
James Bottomleydf133c22005-11-06 11:47:08 -06001102 transport_destroy_device(dev);
James Bottomley86cbfb52011-04-22 10:39:59 -05001103
James Bottomleye63ed0d2014-01-21 07:00:50 -08001104 /*
1105 * Paired with the kref_get() in scsi_sysfs_initialize(). We have
1106 * remoed sysfs visibility from the device, so make the target
1107 * invisible if this was the last device underneath it.
1108 */
1109 scsi_target_reap(scsi_target(sdev));
1110
James Bottomleydf133c22005-11-06 11:47:08 -06001111 put_device(dev);
Alan Stern903f4fe2005-07-26 10:20:53 -04001112}
1113
1114/**
1115 * scsi_remove_device - unregister a device from the scsi bus
1116 * @sdev: scsi_device to unregister
1117 **/
1118void scsi_remove_device(struct scsi_device *sdev)
1119{
Alan Stern54195002005-09-15 21:52:51 -04001120 struct Scsi_Host *shost = sdev->host;
1121
Arjan van de Ven0b950672006-01-11 13:16:10 +01001122 mutex_lock(&shost->scan_mutex);
Alan Stern903f4fe2005-07-26 10:20:53 -04001123 __scsi_remove_device(sdev);
Arjan van de Ven0b950672006-01-11 13:16:10 +01001124 mutex_unlock(&shost->scan_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125}
1126EXPORT_SYMBOL(scsi_remove_device);
1127
Adrian Bunk44818ef2007-07-09 11:59:59 -07001128static void __scsi_remove_target(struct scsi_target *starget)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129{
1130 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1131 unsigned long flags;
Alan Sterna64358d2005-07-26 10:27:10 -04001132 struct scsi_device *sdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133
1134 spin_lock_irqsave(shost->host_lock, flags);
Alan Sterna64358d2005-07-26 10:27:10 -04001135 restart:
1136 list_for_each_entry(sdev, &shost->__devices, siblings) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137 if (sdev->channel != starget->channel ||
Alan Sterna64358d2005-07-26 10:27:10 -04001138 sdev->id != starget->id ||
Christof Schmitt546ae792010-10-06 13:19:44 +02001139 scsi_device_get(sdev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140 continue;
1141 spin_unlock_irqrestore(shost->host_lock, flags);
1142 scsi_remove_device(sdev);
Christof Schmitt546ae792010-10-06 13:19:44 +02001143 scsi_device_put(sdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144 spin_lock_irqsave(shost->host_lock, flags);
Alan Sterna64358d2005-07-26 10:27:10 -04001145 goto restart;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146 }
1147 spin_unlock_irqrestore(shost->host_lock, flags);
mochel@digitalimplant.org20b1e672005-03-24 19:03:59 -08001148}
1149
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150/**
1151 * scsi_remove_target - try to remove a target and all its devices
1152 * @dev: generic starget or parent of generic stargets to be removed
1153 *
1154 * Note: This is slightly racy. It is possible that if the user
1155 * requests the addition of another device then the target won't be
1156 * removed.
1157 */
1158void scsi_remove_target(struct device *dev)
1159{
Dan Williams3b661a92012-06-21 23:47:28 -07001160 struct Scsi_Host *shost = dev_to_shost(dev->parent);
Dan Williamsbc3f02a2012-08-28 22:12:10 -07001161 struct scsi_target *starget, *last = NULL;
Dan Williams3b661a92012-06-21 23:47:28 -07001162 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163
Dan Williamsbc3f02a2012-08-28 22:12:10 -07001164 /* remove targets being careful to lookup next entry before
1165 * deleting the last
1166 */
Dan Williams3b661a92012-06-21 23:47:28 -07001167 spin_lock_irqsave(shost->host_lock, flags);
1168 list_for_each_entry(starget, &shost->__targets, siblings) {
1169 if (starget->state == STARGET_DEL)
1170 continue;
1171 if (starget->dev.parent == dev || &starget->dev == dev) {
Dan Williamsbc3f02a2012-08-28 22:12:10 -07001172 /* assuming new targets arrive at the end */
James Bottomleye63ed0d2014-01-21 07:00:50 -08001173 kref_get(&starget->reap_ref);
Dan Williamsbc3f02a2012-08-28 22:12:10 -07001174 spin_unlock_irqrestore(shost->host_lock, flags);
1175 if (last)
1176 scsi_target_reap(last);
1177 last = starget;
1178 __scsi_remove_target(starget);
1179 spin_lock_irqsave(shost->host_lock, flags);
Dan Williams3b661a92012-06-21 23:47:28 -07001180 }
1181 }
1182 spin_unlock_irqrestore(shost->host_lock, flags);
1183
Dan Williamsbc3f02a2012-08-28 22:12:10 -07001184 if (last)
1185 scsi_target_reap(last);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186}
1187EXPORT_SYMBOL(scsi_remove_target);
1188
1189int scsi_register_driver(struct device_driver *drv)
1190{
1191 drv->bus = &scsi_bus_type;
1192
1193 return driver_register(drv);
1194}
1195EXPORT_SYMBOL(scsi_register_driver);
1196
1197int scsi_register_interface(struct class_interface *intf)
1198{
1199 intf->class = &sdev_class;
1200
1201 return class_interface_register(intf);
1202}
1203EXPORT_SYMBOL(scsi_register_interface);
1204
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205/**
1206 * scsi_sysfs_add_host - add scsi host to subsystem
1207 * @shost: scsi host struct to add to subsystem
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208 **/
1209int scsi_sysfs_add_host(struct Scsi_Host *shost)
1210{
1211 int error, i;
1212
Hannes Reineckef7120a42008-03-18 14:32:28 +01001213 /* add host specific attributes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214 if (shost->hostt->shost_attrs) {
1215 for (i = 0; shost->hostt->shost_attrs[i]; i++) {
Tony Jonesee959b02008-02-22 00:13:36 +01001216 error = device_create_file(&shost->shost_dev,
Hannes Reineckef7120a42008-03-18 14:32:28 +01001217 shost->hostt->shost_attrs[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218 if (error)
1219 return error;
1220 }
1221 }
1222
1223 transport_register_device(&shost->shost_gendev);
James Bottomleyd52b3812008-01-05 09:38:30 -06001224 transport_configure_device(&shost->shost_gendev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225 return 0;
1226}
1227
Kay Sieversbfd12942007-09-11 17:00:14 +02001228static struct device_type scsi_dev_type = {
1229 .name = "scsi_device",
1230 .release = scsi_device_dev_release,
1231 .groups = scsi_sdev_attr_groups,
1232};
1233
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234void scsi_sysfs_device_initialize(struct scsi_device *sdev)
1235{
1236 unsigned long flags;
1237 struct Scsi_Host *shost = sdev->host;
1238 struct scsi_target *starget = sdev->sdev_target;
1239
1240 device_initialize(&sdev->sdev_gendev);
1241 sdev->sdev_gendev.bus = &scsi_bus_type;
Kay Sieversbfd12942007-09-11 17:00:14 +02001242 sdev->sdev_gendev.type = &scsi_dev_type;
Hannes Reinecke9cb78c12014-06-25 15:27:36 +02001243 dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%llu",
Kay Sievers71610f52008-12-03 22:41:36 +01001244 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1245
Tony Jonesee959b02008-02-22 00:13:36 +01001246 device_initialize(&sdev->sdev_dev);
James Bottomley37e6ba02009-10-02 13:30:08 -05001247 sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev);
Tony Jonesee959b02008-02-22 00:13:36 +01001248 sdev->sdev_dev.class = &sdev_class;
Hannes Reinecke9cb78c12014-06-25 15:27:36 +02001249 dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%llu",
Kay Sievers71610f52008-12-03 22:41:36 +01001250 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
Alan Stern50c4e962014-09-02 11:35:50 -04001251 /*
1252 * Get a default scsi_level from the target (derived from sibling
1253 * devices). This is the best we can do for guessing how to set
1254 * sdev->lun_in_cdb for the initial INQUIRY command. For LUN 0 the
1255 * setting doesn't matter, because all the bits are zero anyway.
1256 * But it does matter for higher LUNs.
1257 */
Alan Stern7c9d6f12007-01-08 11:12:32 -05001258 sdev->scsi_level = starget->scsi_level;
Alan Stern50c4e962014-09-02 11:35:50 -04001259 if (sdev->scsi_level <= SCSI_2 &&
1260 sdev->scsi_level != SCSI_UNKNOWN &&
1261 !shost->no_scsi2_lun_in_cdb)
1262 sdev->lun_in_cdb = 1;
1263
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264 transport_setup_device(&sdev->sdev_gendev);
1265 spin_lock_irqsave(shost->host_lock, flags);
1266 list_add_tail(&sdev->same_target_siblings, &starget->devices);
1267 list_add_tail(&sdev->siblings, &shost->__devices);
1268 spin_unlock_irqrestore(shost->host_lock, flags);
James Bottomleye63ed0d2014-01-21 07:00:50 -08001269 /*
1270 * device can now only be removed via __scsi_remove_device() so hold
1271 * the target. Target will be held in CREATED state until something
1272 * beneath it becomes visible (in which case it moves to RUNNING)
1273 */
1274 kref_get(&starget->reap_ref);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275}
1276
1277int scsi_is_sdev_device(const struct device *dev)
1278{
Kay Sievers13ba9bc2007-09-26 19:54:49 +02001279 return dev->type == &scsi_dev_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001280}
1281EXPORT_SYMBOL(scsi_is_sdev_device);
1282
1283/* A blank transport template that is used in drivers that don't
1284 * yet implement Transport Attributes */
1285struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, };