blob: 82dfe07b1d47f7e1f8ae3517191f15d190168834 [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>
Hannes Reinecke41f95dd2015-12-01 10:16:41 +010020#include <scsi/scsi_dh.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include <scsi/scsi_transport.h>
Adrian Bunk44818ef2007-07-09 11:59:59 -070022#include <scsi/scsi_driver.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023
24#include "scsi_priv.h"
25#include "scsi_logging.h"
26
Hannes Reineckeb0ed4332008-03-18 14:32:28 +010027static struct device_type scsi_dev_type;
28
Arjan van de Ven0ad78202005-11-28 16:22:25 +010029static const struct {
Linus Torvalds1da177e2005-04-16 15:20:36 -070030 enum scsi_device_state value;
31 char *name;
32} sdev_states[] = {
33 { SDEV_CREATED, "created" },
34 { SDEV_RUNNING, "running" },
35 { SDEV_CANCEL, "cancel" },
36 { SDEV_DEL, "deleted" },
37 { SDEV_QUIESCE, "quiesce" },
38 { SDEV_OFFLINE, "offline" },
Mike Christie1b8d2622012-05-17 23:56:56 -050039 { SDEV_TRANSPORT_OFFLINE, "transport-offline" },
Linus Torvalds1da177e2005-04-16 15:20:36 -070040 { SDEV_BLOCK, "blocked" },
James Bottomley6f4267e2008-08-22 16:53:31 -050041 { SDEV_CREATED_BLOCK, "created-blocked" },
Linus Torvalds1da177e2005-04-16 15:20:36 -070042};
43
44const char *scsi_device_state_name(enum scsi_device_state state)
45{
46 int i;
47 char *name = NULL;
48
Tobias Klauser6391a112006-06-08 22:23:48 -070049 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 if (sdev_states[i].value == state) {
51 name = sdev_states[i].name;
52 break;
53 }
54 }
55 return name;
56}
57
Arjan van de Ven0ad78202005-11-28 16:22:25 +010058static const struct {
Mike Andersond3301872005-06-16 11:12:38 -070059 enum scsi_host_state value;
60 char *name;
61} shost_states[] = {
62 { SHOST_CREATED, "created" },
63 { SHOST_RUNNING, "running" },
64 { SHOST_CANCEL, "cancel" },
65 { SHOST_DEL, "deleted" },
66 { SHOST_RECOVERY, "recovery" },
James Bottomley939647e2005-09-18 15:05:20 -050067 { SHOST_CANCEL_RECOVERY, "cancel/recovery" },
68 { SHOST_DEL_RECOVERY, "deleted/recovery", },
Mike Andersond3301872005-06-16 11:12:38 -070069};
70const char *scsi_host_state_name(enum scsi_host_state state)
71{
72 int i;
73 char *name = NULL;
74
Tobias Klauser6391a112006-06-08 22:23:48 -070075 for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
Mike Andersond3301872005-06-16 11:12:38 -070076 if (shost_states[i].value == state) {
77 name = shost_states[i].name;
78 break;
79 }
80 }
81 return name;
82}
83
Bart Van Assched78540d2016-03-28 11:13:16 -070084#ifdef CONFIG_SCSI_DH
Hannes Reinecke77c9df92016-03-03 07:54:07 +010085static const struct {
86 unsigned char value;
87 char *name;
88} sdev_access_states[] = {
89 { SCSI_ACCESS_STATE_OPTIMAL, "active/optimized" },
90 { SCSI_ACCESS_STATE_ACTIVE, "active/non-optimized" },
91 { SCSI_ACCESS_STATE_STANDBY, "standby" },
92 { SCSI_ACCESS_STATE_UNAVAILABLE, "unavailable" },
93 { SCSI_ACCESS_STATE_LBA, "lba-dependent" },
94 { SCSI_ACCESS_STATE_OFFLINE, "offline" },
95 { SCSI_ACCESS_STATE_TRANSITIONING, "transitioning" },
96};
97
Bart Van Assched78540d2016-03-28 11:13:16 -070098static const char *scsi_access_state_name(unsigned char state)
Hannes Reinecke77c9df92016-03-03 07:54:07 +010099{
100 int i;
101 char *name = NULL;
102
103 for (i = 0; i < ARRAY_SIZE(sdev_access_states); i++) {
104 if (sdev_access_states[i].value == state) {
105 name = sdev_access_states[i].name;
106 break;
107 }
108 }
109 return name;
110}
Bart Van Assched78540d2016-03-28 11:13:16 -0700111#endif
Hannes Reinecke77c9df92016-03-03 07:54:07 +0100112
Hannes Reinecke9cb78c12014-06-25 15:27:36 +0200113static int check_set(unsigned long long *val, char *src)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114{
115 char *last;
116
117 if (strncmp(src, "-", 20) == 0) {
118 *val = SCAN_WILD_CARD;
119 } else {
120 /*
121 * Doesn't check for int overflow
122 */
Hannes Reinecke9cb78c12014-06-25 15:27:36 +0200123 *val = simple_strtoull(src, &last, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 if (*last != '\0')
125 return 1;
126 }
127 return 0;
128}
129
130static int scsi_scan(struct Scsi_Host *shost, const char *str)
131{
Hannes Reinecke9cb78c12014-06-25 15:27:36 +0200132 char s1[15], s2[15], s3[17], junk;
133 unsigned long long channel, id, lun;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 int res;
135
Hannes Reinecke9cb78c12014-06-25 15:27:36 +0200136 res = sscanf(str, "%10s %10s %16s %c", s1, s2, s3, &junk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 if (res != 3)
138 return -EINVAL;
139 if (check_set(&channel, s1))
140 return -EINVAL;
141 if (check_set(&id, s2))
142 return -EINVAL;
143 if (check_set(&lun, s3))
144 return -EINVAL;
Christoph Hellwige02f3f52006-01-13 19:04:00 +0100145 if (shost->transportt->user_scan)
146 res = shost->transportt->user_scan(shost, channel, id, lun);
147 else
Hannes Reinecke1d645082016-03-17 08:39:45 +0100148 res = scsi_scan_host_selected(shost, channel, id, lun,
149 SCSI_SCAN_MANUAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 return res;
151}
152
153/*
154 * shost_show_function: macro to create an attr function that can be used to
155 * show a non-bit field.
156 */
157#define shost_show_function(name, field, format_string) \
158static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100159show_##name (struct device *dev, struct device_attribute *attr, \
160 char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161{ \
Tony Jonesee959b02008-02-22 00:13:36 +0100162 struct Scsi_Host *shost = class_to_shost(dev); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 return snprintf (buf, 20, format_string, shost->field); \
164}
165
166/*
167 * shost_rd_attr: macro to create a function and attribute variable for a
168 * read only field.
169 */
170#define shost_rd_attr2(name, field, format_string) \
171 shost_show_function(name, field, format_string) \
Tony Jonesee959b02008-02-22 00:13:36 +0100172static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
174#define shost_rd_attr(field, format_string) \
175shost_rd_attr2(field, field, format_string)
176
177/*
178 * Create the actual show/store functions and data structures.
179 */
180
Tony Jonesee959b02008-02-22 00:13:36 +0100181static ssize_t
182store_scan(struct device *dev, struct device_attribute *attr,
183 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184{
Tony Jonesee959b02008-02-22 00:13:36 +0100185 struct Scsi_Host *shost = class_to_shost(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 int res;
187
188 res = scsi_scan(shost, buf);
189 if (res == 0)
190 res = count;
191 return res;
192};
Tony Jonesee959b02008-02-22 00:13:36 +0100193static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194
Mike Andersond3301872005-06-16 11:12:38 -0700195static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100196store_shost_state(struct device *dev, struct device_attribute *attr,
197 const char *buf, size_t count)
Mike Andersond3301872005-06-16 11:12:38 -0700198{
199 int i;
Tony Jonesee959b02008-02-22 00:13:36 +0100200 struct Scsi_Host *shost = class_to_shost(dev);
Mike Andersond3301872005-06-16 11:12:38 -0700201 enum scsi_host_state state = 0;
202
Tobias Klauser6391a112006-06-08 22:23:48 -0700203 for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
Mike Andersond3301872005-06-16 11:12:38 -0700204 const int len = strlen(shost_states[i].name);
205 if (strncmp(shost_states[i].name, buf, len) == 0 &&
206 buf[len] == '\n') {
207 state = shost_states[i].value;
208 break;
209 }
210 }
211 if (!state)
212 return -EINVAL;
213
214 if (scsi_host_set_state(shost, state))
215 return -EINVAL;
216 return count;
217}
218
219static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100220show_shost_state(struct device *dev, struct device_attribute *attr, char *buf)
Mike Andersond3301872005-06-16 11:12:38 -0700221{
Tony Jonesee959b02008-02-22 00:13:36 +0100222 struct Scsi_Host *shost = class_to_shost(dev);
Mike Andersond3301872005-06-16 11:12:38 -0700223 const char *name = scsi_host_state_name(shost->shost_state);
224
225 if (!name)
226 return -EINVAL;
227
228 return snprintf(buf, 20, "%s\n", name);
229}
230
Tony Jonesee959b02008-02-22 00:13:36 +0100231/* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */
Bart Van Assched78540d2016-03-28 11:13:16 -0700232static struct device_attribute dev_attr_hstate =
Tony Jonesee959b02008-02-22 00:13:36 +0100233 __ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state);
Mike Andersond3301872005-06-16 11:12:38 -0700234
FUJITA Tomonori5dc2b892007-09-01 02:02:20 +0900235static ssize_t
236show_shost_mode(unsigned int mode, char *buf)
237{
238 ssize_t len = 0;
239
240 if (mode & MODE_INITIATOR)
241 len = sprintf(buf, "%s", "Initiator");
242
243 if (mode & MODE_TARGET)
244 len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target");
245
246 len += sprintf(buf + len, "\n");
247
248 return len;
249}
250
Tony Jonesee959b02008-02-22 00:13:36 +0100251static ssize_t
252show_shost_supported_mode(struct device *dev, struct device_attribute *attr,
253 char *buf)
FUJITA Tomonori5dc2b892007-09-01 02:02:20 +0900254{
Tony Jonesee959b02008-02-22 00:13:36 +0100255 struct Scsi_Host *shost = class_to_shost(dev);
James Bottomley7a39ac32007-09-25 22:45:53 -0500256 unsigned int supported_mode = shost->hostt->supported_mode;
FUJITA Tomonori5dc2b892007-09-01 02:02:20 +0900257
James Bottomley7a39ac32007-09-25 22:45:53 -0500258 if (supported_mode == MODE_UNKNOWN)
259 /* by default this should be initiator */
260 supported_mode = MODE_INITIATOR;
261
262 return show_shost_mode(supported_mode, buf);
FUJITA Tomonori5dc2b892007-09-01 02:02:20 +0900263}
264
Tony Jonesee959b02008-02-22 00:13:36 +0100265static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL);
FUJITA Tomonori5dc2b892007-09-01 02:02:20 +0900266
Tony Jonesee959b02008-02-22 00:13:36 +0100267static ssize_t
268show_shost_active_mode(struct device *dev,
269 struct device_attribute *attr, char *buf)
FUJITA Tomonori5dc2b892007-09-01 02:02:20 +0900270{
Tony Jonesee959b02008-02-22 00:13:36 +0100271 struct Scsi_Host *shost = class_to_shost(dev);
FUJITA Tomonori5dc2b892007-09-01 02:02:20 +0900272
273 if (shost->active_mode == MODE_UNKNOWN)
274 return snprintf(buf, 20, "unknown\n");
275 else
276 return show_shost_mode(shost->active_mode, buf);
277}
278
Tony Jonesee959b02008-02-22 00:13:36 +0100279static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL);
FUJITA Tomonori5dc2b892007-09-01 02:02:20 +0900280
Sasha Levin072f19b2012-11-15 15:51:46 -0500281static int check_reset_type(const char *str)
Vikas Chaudhary29443692011-08-12 02:51:28 -0700282{
Sasha Levin072f19b2012-11-15 15:51:46 -0500283 if (sysfs_streq(str, "adapter"))
Vikas Chaudhary29443692011-08-12 02:51:28 -0700284 return SCSI_ADAPTER_RESET;
Sasha Levin072f19b2012-11-15 15:51:46 -0500285 else if (sysfs_streq(str, "firmware"))
Vikas Chaudhary29443692011-08-12 02:51:28 -0700286 return SCSI_FIRMWARE_RESET;
287 else
288 return 0;
289}
290
291static ssize_t
292store_host_reset(struct device *dev, struct device_attribute *attr,
293 const char *buf, size_t count)
294{
295 struct Scsi_Host *shost = class_to_shost(dev);
296 struct scsi_host_template *sht = shost->hostt;
297 int ret = -EINVAL;
Vikas Chaudhary29443692011-08-12 02:51:28 -0700298 int type;
299
Sasha Levin072f19b2012-11-15 15:51:46 -0500300 type = check_reset_type(buf);
Vikas Chaudhary29443692011-08-12 02:51:28 -0700301 if (!type)
302 goto exit_store_host_reset;
303
304 if (sht->host_reset)
305 ret = sht->host_reset(shost, type);
306
307exit_store_host_reset:
308 if (ret == 0)
309 ret = count;
310 return ret;
311}
312
313static DEVICE_ATTR(host_reset, S_IWUSR, NULL, store_host_reset);
314
Hannes Reineckeb4562022013-10-23 10:51:21 +0200315static ssize_t
316show_shost_eh_deadline(struct device *dev,
317 struct device_attribute *attr, char *buf)
318{
319 struct Scsi_Host *shost = class_to_shost(dev);
320
Ren Mingxinbb3b6212013-11-11 13:44:56 +0100321 if (shost->eh_deadline == -1)
322 return snprintf(buf, strlen("off") + 2, "off\n");
323 return sprintf(buf, "%u\n", shost->eh_deadline / HZ);
Hannes Reineckeb4562022013-10-23 10:51:21 +0200324}
325
326static ssize_t
327store_shost_eh_deadline(struct device *dev, struct device_attribute *attr,
328 const char *buf, size_t count)
329{
330 struct Scsi_Host *shost = class_to_shost(dev);
331 int ret = -EINVAL;
Ren Mingxinbb3b6212013-11-11 13:44:56 +0100332 unsigned long deadline, flags;
Hannes Reineckeb4562022013-10-23 10:51:21 +0200333
Hannes Reineckead469a52014-01-17 16:05:38 +0100334 if (shost->transportt &&
335 (shost->transportt->eh_strategy_handler ||
336 !shost->hostt->eh_host_reset_handler))
Hannes Reineckeb4562022013-10-23 10:51:21 +0200337 return ret;
338
Ren Mingxinbb3b6212013-11-11 13:44:56 +0100339 if (!strncmp(buf, "off", strlen("off")))
340 deadline = -1;
341 else {
342 ret = kstrtoul(buf, 10, &deadline);
343 if (ret)
344 return ret;
345 if (deadline * HZ > UINT_MAX)
346 return -EINVAL;
Hannes Reineckeb4562022013-10-23 10:51:21 +0200347 }
Ren Mingxinbb3b6212013-11-11 13:44:56 +0100348
349 spin_lock_irqsave(shost->host_lock, flags);
350 if (scsi_host_in_recovery(shost))
351 ret = -EBUSY;
352 else {
353 if (deadline == -1)
354 shost->eh_deadline = -1;
355 else
356 shost->eh_deadline = deadline * HZ;
357
358 ret = count;
359 }
360 spin_unlock_irqrestore(shost->host_lock, flags);
361
Hannes Reineckeb4562022013-10-23 10:51:21 +0200362 return ret;
363}
364
365static DEVICE_ATTR(eh_deadline, S_IRUGO | S_IWUSR, show_shost_eh_deadline, store_shost_eh_deadline);
366
Christoph Hellwigd2852032014-01-17 12:06:53 +0100367shost_rd_attr(use_blk_mq, "%d\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368shost_rd_attr(unique_id, "%u\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369shost_rd_attr(cmd_per_lun, "%hd\n");
James Bottomleyed632da2006-10-16 10:06:27 -0500370shost_rd_attr(can_queue, "%hd\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371shost_rd_attr(sg_tablesize, "%hu\n");
Martin K. Petersen13f05c82010-09-10 20:50:10 +0200372shost_rd_attr(sg_prot_tablesize, "%hu\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373shost_rd_attr(unchecked_isa_dma, "%d\n");
Martin K. Petersen4469f982008-07-17 04:28:30 -0400374shost_rd_attr(prot_capabilities, "%u\n");
375shost_rd_attr(prot_guard_type, "%hd\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376shost_rd_attr2(proc_name, hostt->proc_name, "%s\n");
377
Christoph Hellwig74665012014-01-22 15:29:29 +0100378static ssize_t
379show_host_busy(struct device *dev, struct device_attribute *attr, char *buf)
380{
381 struct Scsi_Host *shost = class_to_shost(dev);
382 return snprintf(buf, 20, "%d\n", atomic_read(&shost->host_busy));
383}
384static DEVICE_ATTR(host_busy, S_IRUGO, show_host_busy, NULL);
385
Hannes Reineckef7120a42008-03-18 14:32:28 +0100386static struct attribute *scsi_sysfs_shost_attrs[] = {
Christoph Hellwigd2852032014-01-17 12:06:53 +0100387 &dev_attr_use_blk_mq.attr,
Hannes Reineckef7120a42008-03-18 14:32:28 +0100388 &dev_attr_unique_id.attr,
389 &dev_attr_host_busy.attr,
390 &dev_attr_cmd_per_lun.attr,
391 &dev_attr_can_queue.attr,
392 &dev_attr_sg_tablesize.attr,
Martin K. Petersen13f05c82010-09-10 20:50:10 +0200393 &dev_attr_sg_prot_tablesize.attr,
Hannes Reineckef7120a42008-03-18 14:32:28 +0100394 &dev_attr_unchecked_isa_dma.attr,
395 &dev_attr_proc_name.attr,
396 &dev_attr_scan.attr,
397 &dev_attr_hstate.attr,
398 &dev_attr_supported_mode.attr,
399 &dev_attr_active_mode.attr,
Martin K. Petersen4469f982008-07-17 04:28:30 -0400400 &dev_attr_prot_capabilities.attr,
401 &dev_attr_prot_guard_type.attr,
Vikas Chaudhary29443692011-08-12 02:51:28 -0700402 &dev_attr_host_reset.attr,
Hannes Reineckeb4562022013-10-23 10:51:21 +0200403 &dev_attr_eh_deadline.attr,
Hannes Reineckef7120a42008-03-18 14:32:28 +0100404 NULL
405};
406
Bart Van Assched78540d2016-03-28 11:13:16 -0700407static struct attribute_group scsi_shost_attr_group = {
Hannes Reineckef7120a42008-03-18 14:32:28 +0100408 .attrs = scsi_sysfs_shost_attrs,
409};
410
David Brownella4dbd672009-06-24 10:06:31 -0700411const struct attribute_group *scsi_sysfs_shost_attr_groups[] = {
Hannes Reineckef7120a42008-03-18 14:32:28 +0100412 &scsi_shost_attr_group,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 NULL
414};
415
Tony Jonesee959b02008-02-22 00:13:36 +0100416static void scsi_device_cls_release(struct device *class_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417{
418 struct scsi_device *sdev;
419
420 sdev = class_to_sdev(class_dev);
421 put_device(&sdev->sdev_gendev);
422}
423
David Howells65f27f32006-11-22 14:55:48 +0000424static void scsi_device_dev_release_usercontext(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425{
426 struct scsi_device *sdev;
427 struct device *parent;
Jeff Garzika341cd02007-10-29 17:15:22 -0400428 struct list_head *this, *tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 unsigned long flags;
430
David Howells65f27f32006-11-22 14:55:48 +0000431 sdev = container_of(work, struct scsi_device, ew.work);
432
Junichi Nomura23695e42015-10-06 04:32:57 +0000433 scsi_dh_release_device(sdev);
434
David Howells65f27f32006-11-22 14:55:48 +0000435 parent = sdev->sdev_gendev.parent;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436
437 spin_lock_irqsave(sdev->host->host_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 list_del(&sdev->siblings);
439 list_del(&sdev->same_target_siblings);
440 list_del(&sdev->starved_entry);
441 spin_unlock_irqrestore(sdev->host->host_lock, flags);
442
Jeff Garzika341cd02007-10-29 17:15:22 -0400443 cancel_work_sync(&sdev->event_work);
444
445 list_for_each_safe(this, tmp, &sdev->event_list) {
446 struct scsi_event *evt;
447
448 evt = list_entry(this, struct scsi_event, node);
449 list_del(&evt->node);
450 kfree(evt);
451 }
452
James Bottomleye73e0792011-05-25 15:52:14 -0500453 blk_put_queue(sdev->request_queue);
James Bottomley86cbfb52011-04-22 10:39:59 -0500454 /* NULL queue means the device can't be used */
455 sdev->request_queue = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456
Hannes Reineckeb3ae8782014-03-15 09:51:49 +0100457 kfree(sdev->vpd_pg83);
458 kfree(sdev->vpd_pg80);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 kfree(sdev->inquiry);
460 kfree(sdev);
461
462 if (parent)
463 put_device(parent);
464}
465
James Bottomley65110b22006-02-14 10:48:46 -0600466static void scsi_device_dev_release(struct device *dev)
467{
James Bottomleyffedb452006-02-23 14:27:18 -0600468 struct scsi_device *sdp = to_scsi_device(dev);
David Howells65f27f32006-11-22 14:55:48 +0000469 execute_in_process_context(scsi_device_dev_release_usercontext,
James Bottomleyffedb452006-02-23 14:27:18 -0600470 &sdp->ew);
James Bottomley65110b22006-02-14 10:48:46 -0600471}
472
Adrian Bunk52c1da32005-06-23 22:05:33 -0700473static struct class sdev_class = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 .name = "scsi_device",
Tony Jonesee959b02008-02-22 00:13:36 +0100475 .dev_release = scsi_device_cls_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476};
477
478/* all probing is done in the individual ->probe routines */
479static int scsi_bus_match(struct device *dev, struct device_driver *gendrv)
480{
Hannes Reineckeb0ed4332008-03-18 14:32:28 +0100481 struct scsi_device *sdp;
482
483 if (dev->type != &scsi_dev_type)
484 return 0;
485
486 sdp = to_scsi_device(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 if (sdp->no_uld_attach)
488 return 0;
489 return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0;
490}
491
Kay Sievers7eff2e72007-08-14 15:15:12 +0200492static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
Michael Tokarevd7b8bcb2006-10-27 16:02:37 +0400493{
James Bottomley1f42ea72008-05-22 12:34:41 +0100494 struct scsi_device *sdev;
495
496 if (dev->type != &scsi_dev_type)
497 return 0;
498
499 sdev = to_scsi_device(dev);
Michael Tokarevd7b8bcb2006-10-27 16:02:37 +0400500
Kay Sievers7eff2e72007-08-14 15:15:12 +0200501 add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type);
Michael Tokarevd7b8bcb2006-10-27 16:02:37 +0400502 return 0;
503}
504
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505struct bus_type scsi_bus_type = {
506 .name = "scsi",
507 .match = scsi_bus_match,
Michael Tokarevd7b8bcb2006-10-27 16:02:37 +0400508 .uevent = scsi_bus_uevent,
Rafael J. Wysockiaa338602011-02-11 00:06:54 +0100509#ifdef CONFIG_PM
Alan Sterndb5bd1e2010-06-17 10:36:49 -0400510 .pm = &scsi_bus_pm_ops,
Alan Sterne6da54d2010-08-05 13:17:10 -0400511#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512};
Chandra Seetharamana6a8d9f2008-05-01 14:49:46 -0700513EXPORT_SYMBOL_GPL(scsi_bus_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514
515int scsi_sysfs_register(void)
516{
517 int error;
518
519 error = bus_register(&scsi_bus_type);
520 if (!error) {
521 error = class_register(&sdev_class);
522 if (error)
523 bus_unregister(&scsi_bus_type);
524 }
525
526 return error;
527}
528
529void scsi_sysfs_unregister(void)
530{
531 class_unregister(&sdev_class);
532 bus_unregister(&scsi_bus_type);
533}
534
535/*
536 * sdev_show_function: macro to create an attr function that can be used to
537 * show a non-bit field.
538 */
539#define sdev_show_function(field, format_string) \
540static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100541sdev_show_##field (struct device *dev, struct device_attribute *attr, \
542 char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543{ \
544 struct scsi_device *sdev; \
545 sdev = to_scsi_device(dev); \
546 return snprintf (buf, 20, format_string, sdev->field); \
547} \
548
549/*
550 * sdev_rd_attr: macro to create a function and attribute variable for a
551 * read only field.
552 */
553#define sdev_rd_attr(field, format_string) \
554 sdev_show_function(field, format_string) \
555static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL);
556
557
558/*
Tomohiro Kusumi160e7f62010-04-14 15:15:14 +0900559 * sdev_rw_attr: create a function and attribute variable for a
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 * read/write field.
561 */
562#define sdev_rw_attr(field, format_string) \
563 sdev_show_function(field, format_string) \
564 \
565static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100566sdev_store_##field (struct device *dev, struct device_attribute *attr, \
567 const char *buf, size_t count) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568{ \
569 struct scsi_device *sdev; \
570 sdev = to_scsi_device(dev); \
Tomohiro Kusumi160e7f62010-04-14 15:15:14 +0900571 sscanf (buf, format_string, &sdev->field); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 return count; \
573} \
574static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
575
576/* Currently we don't export bit fields, but we might in future,
577 * so leave this code in */
578#if 0
579/*
580 * sdev_rd_attr: create a function and attribute variable for a
581 * read/write bit field.
582 */
583#define sdev_rw_attr_bit(field) \
584 sdev_show_function(field, "%d\n") \
585 \
586static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100587sdev_store_##field (struct device *dev, struct device_attribute *attr, \
588 const char *buf, size_t count) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589{ \
590 int ret; \
591 struct scsi_device *sdev; \
592 ret = scsi_sdev_check_buf_bit(buf); \
593 if (ret >= 0) { \
594 sdev = to_scsi_device(dev); \
595 sdev->field = ret; \
596 ret = count; \
597 } \
598 return ret; \
599} \
600static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
601
602/*
603 * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1",
604 * else return -EINVAL.
605 */
606static int scsi_sdev_check_buf_bit(const char *buf)
607{
608 if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
609 if (buf[0] == '1')
610 return 1;
611 else if (buf[0] == '0')
612 return 0;
613 else
614 return -EINVAL;
615 } else
616 return -EINVAL;
617}
618#endif
619/*
620 * Create the actual show/store functions and data structures.
621 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622sdev_rd_attr (type, "%d\n");
623sdev_rd_attr (scsi_level, "%d\n");
624sdev_rd_attr (vendor, "%.8s\n");
625sdev_rd_attr (model, "%.16s\n");
626sdev_rd_attr (rev, "%.4s\n");
627
Christoph Hellwig71e75c92014-04-11 19:07:01 +0200628static ssize_t
629sdev_show_device_busy(struct device *dev, struct device_attribute *attr,
630 char *buf)
631{
632 struct scsi_device *sdev = to_scsi_device(dev);
633 return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_busy));
634}
635static DEVICE_ATTR(device_busy, S_IRUGO, sdev_show_device_busy, NULL);
636
Christoph Hellwigcd9070c2014-01-23 12:07:41 +0100637static ssize_t
638sdev_show_device_blocked(struct device *dev, struct device_attribute *attr,
639 char *buf)
640{
641 struct scsi_device *sdev = to_scsi_device(dev);
642 return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_blocked));
643}
644static DEVICE_ATTR(device_blocked, S_IRUGO, sdev_show_device_blocked, NULL);
645
Jens Axboe242f9dc2008-09-14 05:55:09 -0700646/*
647 * TODO: can we make these symlinks to the block layer ones?
648 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649static ssize_t
Yani Ioannou10523b32005-05-17 06:43:37 -0400650sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651{
652 struct scsi_device *sdev;
653 sdev = to_scsi_device(dev);
Jens Axboe242f9dc2008-09-14 05:55:09 -0700654 return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655}
656
657static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100658sdev_store_timeout (struct device *dev, struct device_attribute *attr,
659 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660{
661 struct scsi_device *sdev;
662 int timeout;
663 sdev = to_scsi_device(dev);
664 sscanf (buf, "%d\n", &timeout);
Jens Axboe242f9dc2008-09-14 05:55:09 -0700665 blk_queue_rq_timeout(sdev->request_queue, timeout * HZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666 return count;
667}
668static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout);
669
670static ssize_t
Martin K. Petersen0816c922013-05-10 10:36:04 -0400671sdev_show_eh_timeout(struct device *dev, struct device_attribute *attr, char *buf)
672{
673 struct scsi_device *sdev;
674 sdev = to_scsi_device(dev);
675 return snprintf(buf, 20, "%u\n", sdev->eh_timeout / HZ);
676}
677
678static ssize_t
679sdev_store_eh_timeout(struct device *dev, struct device_attribute *attr,
680 const char *buf, size_t count)
681{
682 struct scsi_device *sdev;
683 unsigned int eh_timeout;
684 int err;
685
686 if (!capable(CAP_SYS_ADMIN))
687 return -EACCES;
688
689 sdev = to_scsi_device(dev);
690 err = kstrtouint(buf, 10, &eh_timeout);
691 if (err)
692 return err;
693 sdev->eh_timeout = eh_timeout * HZ;
694
695 return count;
696}
697static DEVICE_ATTR(eh_timeout, S_IRUGO | S_IWUSR, sdev_show_eh_timeout, sdev_store_eh_timeout);
698
699static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100700store_rescan_field (struct device *dev, struct device_attribute *attr,
701 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702{
703 scsi_rescan_device(dev);
704 return count;
705}
706static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field);
707
Tony Jonesee959b02008-02-22 00:13:36 +0100708static ssize_t
709sdev_store_delete(struct device *dev, struct device_attribute *attr,
710 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711{
Tejun Heoac0ece92014-02-03 14:03:03 -0500712 if (device_remove_file_self(dev, attr))
713 scsi_remove_device(to_scsi_device(dev));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 return count;
715};
716static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete);
717
718static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100719store_state_field(struct device *dev, struct device_attribute *attr,
720 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721{
722 int i;
723 struct scsi_device *sdev = to_scsi_device(dev);
724 enum scsi_device_state state = 0;
725
Tobias Klauser6391a112006-06-08 22:23:48 -0700726 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 const int len = strlen(sdev_states[i].name);
728 if (strncmp(sdev_states[i].name, buf, len) == 0 &&
729 buf[len] == '\n') {
730 state = sdev_states[i].value;
731 break;
732 }
733 }
734 if (!state)
735 return -EINVAL;
736
737 if (scsi_device_set_state(sdev, state))
738 return -EINVAL;
739 return count;
740}
741
742static ssize_t
Yani Ioannou10523b32005-05-17 06:43:37 -0400743show_state_field(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744{
745 struct scsi_device *sdev = to_scsi_device(dev);
746 const char *name = scsi_device_state_name(sdev->sdev_state);
747
748 if (!name)
749 return -EINVAL;
750
751 return snprintf(buf, 20, "%s\n", name);
752}
753
754static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field);
755
756static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100757show_queue_type_field(struct device *dev, struct device_attribute *attr,
758 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759{
760 struct scsi_device *sdev = to_scsi_device(dev);
761 const char *name = "none";
762
Christoph Hellwig609aa222014-10-30 11:54:58 +0100763 if (sdev->simple_tags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 name = "simple";
765
766 return snprintf(buf, 20, "%s\n", name);
767}
768
Hannes Reinecke276b20d2014-03-15 09:51:47 +0100769static ssize_t
770store_queue_type_field(struct device *dev, struct device_attribute *attr,
771 const char *buf, size_t count)
772{
773 struct scsi_device *sdev = to_scsi_device(dev);
Hannes Reinecke276b20d2014-03-15 09:51:47 +0100774
Christoph Hellwigefc3c1d2014-11-24 15:36:18 +0100775 if (!sdev->tagged_supported)
Hannes Reinecke276b20d2014-03-15 09:51:47 +0100776 return -EINVAL;
Christoph Hellwigefc3c1d2014-11-24 15:36:18 +0100777
778 sdev_printk(KERN_INFO, sdev,
779 "ignoring write to deprecated queue_type attribute");
Hannes Reinecke276b20d2014-03-15 09:51:47 +0100780 return count;
781}
782
783static DEVICE_ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field,
784 store_queue_type_field);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785
Hannes Reineckeb3ae8782014-03-15 09:51:49 +0100786#define sdev_vpd_pg_attr(_page) \
787static ssize_t \
788show_vpd_##_page(struct file *filp, struct kobject *kobj, \
789 struct bin_attribute *bin_attr, \
790 char *buf, loff_t off, size_t count) \
791{ \
792 struct device *dev = container_of(kobj, struct device, kobj); \
793 struct scsi_device *sdev = to_scsi_device(dev); \
Hannes Reinecke09e2b0b2015-11-09 13:24:28 +0100794 int ret; \
Hannes Reineckeb3ae8782014-03-15 09:51:49 +0100795 if (!sdev->vpd_##_page) \
796 return -EINVAL; \
Hannes Reinecke09e2b0b2015-11-09 13:24:28 +0100797 rcu_read_lock(); \
798 ret = memory_read_from_buffer(buf, count, &off, \
799 rcu_dereference(sdev->vpd_##_page), \
Hannes Reineckeb3ae8782014-03-15 09:51:49 +0100800 sdev->vpd_##_page##_len); \
Hannes Reinecke09e2b0b2015-11-09 13:24:28 +0100801 rcu_read_unlock(); \
802 return ret; \
Hannes Reineckeb3ae8782014-03-15 09:51:49 +0100803} \
804static struct bin_attribute dev_attr_vpd_##_page = { \
805 .attr = {.name = __stringify(vpd_##_page), .mode = S_IRUGO }, \
806 .size = 0, \
807 .read = show_vpd_##_page, \
808};
809
810sdev_vpd_pg_attr(pg83);
811sdev_vpd_pg_attr(pg80);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812
Johannes Thumshirn92e62462015-11-09 10:56:57 +0100813static ssize_t show_inquiry(struct file *filep, struct kobject *kobj,
814 struct bin_attribute *bin_attr,
815 char *buf, loff_t off, size_t count)
816{
817 struct device *dev = container_of(kobj, struct device, kobj);
818 struct scsi_device *sdev = to_scsi_device(dev);
819
820 if (!sdev->inquiry)
821 return -EINVAL;
822
823 return memory_read_from_buffer(buf, count, &off, sdev->inquiry,
824 sdev->inquiry_len);
825}
826
827static struct bin_attribute dev_attr_inquiry = {
828 .attr = {
829 .name = "inquiry",
830 .mode = S_IRUGO,
831 },
832 .size = 0,
833 .read = show_inquiry,
834};
835
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836static ssize_t
Hannes Reineckeb3ae8782014-03-15 09:51:49 +0100837show_iostat_counterbits(struct device *dev, struct device_attribute *attr,
838 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839{
840 return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8);
841}
842
843static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL);
844
845#define show_sdev_iostat(field) \
846static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100847show_iostat_##field(struct device *dev, struct device_attribute *attr, \
848 char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849{ \
850 struct scsi_device *sdev = to_scsi_device(dev); \
851 unsigned long long count = atomic_read(&sdev->field); \
852 return snprintf(buf, 20, "0x%llx\n", count); \
853} \
854static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL)
855
856show_sdev_iostat(iorequest_cnt);
857show_sdev_iostat(iodone_cnt);
858show_sdev_iostat(ioerr_cnt);
859
Michael Tokarevd7b8bcb2006-10-27 16:02:37 +0400860static ssize_t
861sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
862{
863 struct scsi_device *sdev;
864 sdev = to_scsi_device(dev);
865 return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type);
866}
867static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868
Jeff Garzika341cd02007-10-29 17:15:22 -0400869#define DECLARE_EVT_SHOW(name, Cap_name) \
870static ssize_t \
871sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \
Tony Jonesee959b02008-02-22 00:13:36 +0100872 char *buf) \
Jeff Garzika341cd02007-10-29 17:15:22 -0400873{ \
874 struct scsi_device *sdev = to_scsi_device(dev); \
875 int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\
876 return snprintf(buf, 20, "%d\n", val); \
877}
878
879#define DECLARE_EVT_STORE(name, Cap_name) \
880static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100881sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\
Jeff Garzika341cd02007-10-29 17:15:22 -0400882 const char *buf, size_t count) \
883{ \
884 struct scsi_device *sdev = to_scsi_device(dev); \
885 int val = simple_strtoul(buf, NULL, 0); \
886 if (val == 0) \
887 clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
888 else if (val == 1) \
889 set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
890 else \
891 return -EINVAL; \
892 return count; \
893}
894
895#define DECLARE_EVT(name, Cap_name) \
896 DECLARE_EVT_SHOW(name, Cap_name) \
897 DECLARE_EVT_STORE(name, Cap_name) \
898 static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \
899 sdev_store_evt_##name);
900#define REF_EVT(name) &dev_attr_evt_##name.attr
901
902DECLARE_EVT(media_change, MEDIA_CHANGE)
Ewan D. Milne279afdf2013-08-08 15:07:48 -0400903DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED)
904DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED)
905DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED)
906DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED)
907DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED)
Jeff Garzika341cd02007-10-29 17:15:22 -0400908
Tony Jonesee959b02008-02-22 00:13:36 +0100909static ssize_t
Hannes Reinecke276b20d2014-03-15 09:51:47 +0100910sdev_store_queue_depth(struct device *dev, struct device_attribute *attr,
911 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912{
913 int depth, retval;
914 struct scsi_device *sdev = to_scsi_device(dev);
915 struct scsi_host_template *sht = sdev->host->hostt;
916
917 if (!sht->change_queue_depth)
918 return -EINVAL;
919
920 depth = simple_strtoul(buf, NULL, 0);
921
Jens Axboe1278dd62015-07-13 08:24:39 -0600922 if (depth < 1 || depth > sdev->host->can_queue)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923 return -EINVAL;
924
Christoph Hellwigdb5ed4d2014-11-13 15:08:42 +0100925 retval = sht->change_queue_depth(sdev, depth);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926 if (retval < 0)
927 return retval;
928
Vasu Dev4a840672009-10-22 15:46:33 -0700929 sdev->max_queue_depth = sdev->queue_depth;
930
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931 return count;
932}
Hannes Reinecke276b20d2014-03-15 09:51:47 +0100933sdev_show_function(queue_depth, "%d\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934
Hannes Reinecke276b20d2014-03-15 09:51:47 +0100935static DEVICE_ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth,
936 sdev_store_queue_depth);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937
Hannes Reinecke248d4fe2015-12-01 10:16:56 +0100938static ssize_t
939sdev_show_wwid(struct device *dev, struct device_attribute *attr,
940 char *buf)
941{
942 struct scsi_device *sdev = to_scsi_device(dev);
943 ssize_t count;
944
945 count = scsi_vpd_lun_id(sdev, buf, PAGE_SIZE);
946 if (count > 0) {
947 buf[count] = '\n';
948 count++;
949 }
950 return count;
951}
952static DEVICE_ATTR(wwid, S_IRUGO, sdev_show_wwid, NULL);
953
Hannes Reinecke41f95dd2015-12-01 10:16:41 +0100954#ifdef CONFIG_SCSI_DH
955static ssize_t
956sdev_show_dh_state(struct device *dev, struct device_attribute *attr,
957 char *buf)
958{
959 struct scsi_device *sdev = to_scsi_device(dev);
960
961 if (!sdev->handler)
962 return snprintf(buf, 20, "detached\n");
963
964 return snprintf(buf, 20, "%s\n", sdev->handler->name);
965}
966
967static ssize_t
968sdev_store_dh_state(struct device *dev, struct device_attribute *attr,
969 const char *buf, size_t count)
970{
971 struct scsi_device *sdev = to_scsi_device(dev);
972 int err = -EINVAL;
973
974 if (sdev->sdev_state == SDEV_CANCEL ||
975 sdev->sdev_state == SDEV_DEL)
976 return -ENODEV;
977
978 if (!sdev->handler) {
979 /*
980 * Attach to a device handler
981 */
982 err = scsi_dh_attach(sdev->request_queue, buf);
983 } else if (!strncmp(buf, "activate", 8)) {
984 /*
985 * Activate a device handler
986 */
987 if (sdev->handler->activate)
988 err = sdev->handler->activate(sdev, NULL, NULL);
989 else
990 err = 0;
991 } else if (!strncmp(buf, "detach", 6)) {
992 /*
993 * Detach from a device handler
994 */
995 sdev_printk(KERN_WARNING, sdev,
996 "can't detach handler %s.\n",
997 sdev->handler->name);
998 err = -EINVAL;
999 }
1000
1001 return err < 0 ? err : count;
1002}
1003
1004static DEVICE_ATTR(dh_state, S_IRUGO | S_IWUSR, sdev_show_dh_state,
1005 sdev_store_dh_state);
Hannes Reinecke77c9df92016-03-03 07:54:07 +01001006
1007static ssize_t
1008sdev_show_access_state(struct device *dev,
1009 struct device_attribute *attr,
1010 char *buf)
1011{
1012 struct scsi_device *sdev = to_scsi_device(dev);
1013 unsigned char access_state;
1014 const char *access_state_name;
1015
1016 if (!sdev->handler)
1017 return -EINVAL;
1018
1019 access_state = (sdev->access_state & SCSI_ACCESS_STATE_MASK);
1020 access_state_name = scsi_access_state_name(access_state);
1021
1022 return sprintf(buf, "%s\n",
1023 access_state_name ? access_state_name : "unknown");
1024}
1025static DEVICE_ATTR(access_state, S_IRUGO, sdev_show_access_state, NULL);
1026
1027static ssize_t
1028sdev_show_preferred_path(struct device *dev,
1029 struct device_attribute *attr,
1030 char *buf)
1031{
1032 struct scsi_device *sdev = to_scsi_device(dev);
1033
1034 if (!sdev->handler)
1035 return -EINVAL;
1036
1037 if (sdev->access_state & SCSI_ACCESS_STATE_PREFERRED)
1038 return sprintf(buf, "1\n");
1039 else
1040 return sprintf(buf, "0\n");
1041}
1042static DEVICE_ATTR(preferred_path, S_IRUGO, sdev_show_preferred_path, NULL);
Hannes Reinecke41f95dd2015-12-01 10:16:41 +01001043#endif
1044
Tony Jonesee959b02008-02-22 00:13:36 +01001045static ssize_t
Vasu Dev4a840672009-10-22 15:46:33 -07001046sdev_show_queue_ramp_up_period(struct device *dev,
1047 struct device_attribute *attr,
1048 char *buf)
1049{
1050 struct scsi_device *sdev;
1051 sdev = to_scsi_device(dev);
1052 return snprintf(buf, 20, "%u\n",
1053 jiffies_to_msecs(sdev->queue_ramp_up_period));
1054}
1055
1056static ssize_t
1057sdev_store_queue_ramp_up_period(struct device *dev,
1058 struct device_attribute *attr,
1059 const char *buf, size_t count)
1060{
1061 struct scsi_device *sdev = to_scsi_device(dev);
Daniel Walterf7c65af2014-08-08 14:24:05 -07001062 unsigned int period;
Vasu Dev4a840672009-10-22 15:46:33 -07001063
Daniel Walterf7c65af2014-08-08 14:24:05 -07001064 if (kstrtouint(buf, 10, &period))
Vasu Dev4a840672009-10-22 15:46:33 -07001065 return -EINVAL;
1066
1067 sdev->queue_ramp_up_period = msecs_to_jiffies(period);
Peter Oberparleiter5cb9b402015-10-26 15:54:23 +01001068 return count;
Vasu Dev4a840672009-10-22 15:46:33 -07001069}
1070
Hannes Reinecke276b20d2014-03-15 09:51:47 +01001071static DEVICE_ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR,
1072 sdev_show_queue_ramp_up_period,
1073 sdev_store_queue_ramp_up_period);
Vasu Dev4a840672009-10-22 15:46:33 -07001074
Hannes Reinecke276b20d2014-03-15 09:51:47 +01001075static umode_t scsi_sdev_attr_is_visible(struct kobject *kobj,
1076 struct attribute *attr, int i)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077{
Hannes Reinecke276b20d2014-03-15 09:51:47 +01001078 struct device *dev = container_of(kobj, struct device, kobj);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079 struct scsi_device *sdev = to_scsi_device(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081
Hannes Reinecke276b20d2014-03-15 09:51:47 +01001082 if (attr == &dev_attr_queue_depth.attr &&
1083 !sdev->host->hostt->change_queue_depth)
1084 return S_IRUGO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085
Hannes Reinecke276b20d2014-03-15 09:51:47 +01001086 if (attr == &dev_attr_queue_ramp_up_period.attr &&
1087 !sdev->host->hostt->change_queue_depth)
1088 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089
Hannes Reinecke77c9df92016-03-03 07:54:07 +01001090#ifdef CONFIG_SCSI_DH
1091 if (attr == &dev_attr_access_state.attr &&
1092 !sdev->handler)
1093 return 0;
1094 if (attr == &dev_attr_preferred_path.attr &&
1095 !sdev->handler)
1096 return 0;
1097#endif
Hannes Reinecke276b20d2014-03-15 09:51:47 +01001098 return attr->mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099}
1100
Hannes Reinecke7e479762016-03-03 07:41:24 +01001101static umode_t scsi_sdev_bin_attr_is_visible(struct kobject *kobj,
1102 struct bin_attribute *attr, int i)
1103{
1104 struct device *dev = container_of(kobj, struct device, kobj);
1105 struct scsi_device *sdev = to_scsi_device(dev);
1106
1107
1108 if (attr == &dev_attr_vpd_pg80 && !sdev->vpd_pg80)
1109 return 0;
1110
Hannes Reinecke68887582016-03-10 11:25:26 +01001111 if (attr == &dev_attr_vpd_pg83 && !sdev->vpd_pg83)
Hannes Reinecke7e479762016-03-03 07:41:24 +01001112 return 0;
1113
1114 return S_IRUGO;
1115}
1116
Hannes Reinecke276b20d2014-03-15 09:51:47 +01001117/* Default template for device attributes. May NOT be modified */
1118static struct attribute *scsi_sdev_attrs[] = {
1119 &dev_attr_device_blocked.attr,
1120 &dev_attr_type.attr,
1121 &dev_attr_scsi_level.attr,
1122 &dev_attr_device_busy.attr,
1123 &dev_attr_vendor.attr,
1124 &dev_attr_model.attr,
1125 &dev_attr_rev.attr,
1126 &dev_attr_rescan.attr,
1127 &dev_attr_delete.attr,
1128 &dev_attr_state.attr,
1129 &dev_attr_timeout.attr,
1130 &dev_attr_eh_timeout.attr,
1131 &dev_attr_iocounterbits.attr,
1132 &dev_attr_iorequest_cnt.attr,
1133 &dev_attr_iodone_cnt.attr,
1134 &dev_attr_ioerr_cnt.attr,
1135 &dev_attr_modalias.attr,
1136 &dev_attr_queue_depth.attr,
1137 &dev_attr_queue_type.attr,
Hannes Reinecke248d4fe2015-12-01 10:16:56 +01001138 &dev_attr_wwid.attr,
Hannes Reinecke41f95dd2015-12-01 10:16:41 +01001139#ifdef CONFIG_SCSI_DH
1140 &dev_attr_dh_state.attr,
Hannes Reinecke77c9df92016-03-03 07:54:07 +01001141 &dev_attr_access_state.attr,
1142 &dev_attr_preferred_path.attr,
Hannes Reinecke41f95dd2015-12-01 10:16:41 +01001143#endif
Hannes Reinecke276b20d2014-03-15 09:51:47 +01001144 &dev_attr_queue_ramp_up_period.attr,
1145 REF_EVT(media_change),
1146 REF_EVT(inquiry_change_reported),
1147 REF_EVT(capacity_change_reported),
1148 REF_EVT(soft_threshold_reached),
1149 REF_EVT(mode_parameter_change_reported),
1150 REF_EVT(lun_change_reported),
1151 NULL
1152};
1153
Hannes Reineckeb3ae8782014-03-15 09:51:49 +01001154static struct bin_attribute *scsi_sdev_bin_attrs[] = {
1155 &dev_attr_vpd_pg83,
1156 &dev_attr_vpd_pg80,
Johannes Thumshirn92e62462015-11-09 10:56:57 +01001157 &dev_attr_inquiry,
Hannes Reineckeb3ae8782014-03-15 09:51:49 +01001158 NULL
1159};
Hannes Reinecke276b20d2014-03-15 09:51:47 +01001160static struct attribute_group scsi_sdev_attr_group = {
1161 .attrs = scsi_sdev_attrs,
Hannes Reineckeb3ae8782014-03-15 09:51:49 +01001162 .bin_attrs = scsi_sdev_bin_attrs,
Hannes Reinecke276b20d2014-03-15 09:51:47 +01001163 .is_visible = scsi_sdev_attr_is_visible,
Hannes Reinecke7e479762016-03-03 07:41:24 +01001164 .is_bin_visible = scsi_sdev_bin_attr_is_visible,
Hannes Reinecke276b20d2014-03-15 09:51:47 +01001165};
1166
1167static const struct attribute_group *scsi_sdev_attr_groups[] = {
1168 &scsi_sdev_attr_group,
1169 NULL
1170};
1171
James Bottomley643eb2d2008-03-22 22:42:27 -05001172static int scsi_target_add(struct scsi_target *starget)
1173{
1174 int error;
1175
1176 if (starget->state != STARGET_CREATED)
1177 return 0;
1178
1179 error = device_add(&starget->dev);
1180 if (error) {
1181 dev_err(&starget->dev, "target device_add failed, error %d\n", error);
James Bottomley643eb2d2008-03-22 22:42:27 -05001182 return error;
1183 }
1184 transport_add_device(&starget->dev);
1185 starget->state = STARGET_RUNNING;
1186
Alan Sternbc4f2402010-06-17 10:41:42 -04001187 pm_runtime_set_active(&starget->dev);
1188 pm_runtime_enable(&starget->dev);
1189 device_enable_async_suspend(&starget->dev);
1190
James Bottomley643eb2d2008-03-22 22:42:27 -05001191 return 0;
1192}
1193
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194/**
1195 * scsi_sysfs_add_sdev - add scsi device to sysfs
1196 * @sdev: scsi_device to add
1197 *
1198 * Return value:
1199 * 0 on Success / non-zero on Failure
1200 **/
1201int scsi_sysfs_add_sdev(struct scsi_device *sdev)
1202{
1203 int error, i;
James Bottomley80ed71c2007-07-19 10:15:10 -05001204 struct request_queue *rq = sdev->request_queue;
James Bottomley643eb2d2008-03-22 22:42:27 -05001205 struct scsi_target *starget = sdev->sdev_target;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206
James Bottomley643eb2d2008-03-22 22:42:27 -05001207 error = scsi_target_add(starget);
1208 if (error)
1209 return error;
1210
1211 transport_configure_device(&starget->dev);
Alan Sternbc4f2402010-06-17 10:41:42 -04001212
Rafael J. Wysocki4cb077d2010-02-08 19:18:26 +01001213 device_enable_async_suspend(&sdev->sdev_gendev);
Alan Sternbc4f2402010-06-17 10:41:42 -04001214 scsi_autopm_get_target(starget);
1215 pm_runtime_set_active(&sdev->sdev_gendev);
1216 pm_runtime_forbid(&sdev->sdev_gendev);
1217 pm_runtime_enable(&sdev->sdev_gendev);
1218 scsi_autopm_put_target(starget);
1219
Alan Sternbc4f2402010-06-17 10:41:42 -04001220 scsi_autopm_get_device(sdev);
1221
Christoph Hellwig086b91d2015-08-27 14:16:57 +02001222 error = scsi_dh_add_device(sdev);
Hannes Reinecke221255a2015-12-01 10:16:42 +01001223 if (error)
1224 /*
1225 * device_handler is optional, so any error can be ignored
1226 */
Christoph Hellwig086b91d2015-08-27 14:16:57 +02001227 sdev_printk(KERN_INFO, sdev,
1228 "failed to add device handler: %d\n", error);
Christoph Hellwig086b91d2015-08-27 14:16:57 +02001229
Hannes Reinecke4cd24592016-03-03 07:54:12 +01001230 error = device_add(&sdev->sdev_gendev);
1231 if (error) {
1232 sdev_printk(KERN_INFO, sdev,
1233 "failed to add device: %d\n", error);
1234 scsi_dh_remove_device(sdev);
1235 return error;
1236 }
1237
Rafael J. Wysocki4cb077d2010-02-08 19:18:26 +01001238 device_enable_async_suspend(&sdev->sdev_dev);
Tony Jonesee959b02008-02-22 00:13:36 +01001239 error = device_add(&sdev->sdev_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240 if (error) {
Alan Stern73d8c342010-11-15 16:03:04 -05001241 sdev_printk(KERN_INFO, sdev,
1242 "failed to add class device: %d\n", error);
Christoph Hellwig086b91d2015-08-27 14:16:57 +02001243 scsi_dh_remove_device(sdev);
James Bottomley860dc732009-11-19 17:48:29 -05001244 device_del(&sdev->sdev_gendev);
Alan Sternee37e092010-02-12 12:13:55 -05001245 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246 }
James Bottomley860dc732009-11-19 17:48:29 -05001247 transport_add_device(&sdev->sdev_gendev);
1248 sdev->is_visible = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249
FUJITA Tomonori97f46ae2008-04-19 00:43:14 +09001250 error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL);
James Bottomley80ed71c2007-07-19 10:15:10 -05001251
1252 if (error)
James Bottomley860dc732009-11-19 17:48:29 -05001253 /* we're treating error on bsg register as non-fatal,
1254 * so pretend nothing went wrong */
James Bottomley80ed71c2007-07-19 10:15:10 -05001255 sdev_printk(KERN_INFO, sdev,
1256 "Failed to register bsg queue, errno=%d\n", error);
1257
Kay Sieversbfd12942007-09-11 17:00:14 +02001258 /* add additional host specific attributes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259 if (sdev->host->hostt->sdev_attrs) {
1260 for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) {
Kay Sieversbfd12942007-09-11 17:00:14 +02001261 error = device_create_file(&sdev->sdev_gendev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262 sdev->host->hostt->sdev_attrs[i]);
James Bottomley860dc732009-11-19 17:48:29 -05001263 if (error)
Alan Sternee37e092010-02-12 12:13:55 -05001264 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001265 }
1266 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267
Subhash Jadavani6fe8c1d2014-09-10 14:54:09 +03001268 scsi_autopm_put_device(sdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270}
1271
Alan Stern903f4fe2005-07-26 10:20:53 -04001272void __scsi_remove_device(struct scsi_device *sdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273{
James Bottomleydf133c22005-11-06 11:47:08 -06001274 struct device *dev = &sdev->sdev_gendev;
1275
Vitaly Kuznetsovbe821fd2015-11-19 14:02:19 +01001276 /*
1277 * This cleanup path is not reentrant and while it is impossible
1278 * to get a new reference with scsi_device_get() someone can still
1279 * hold a previously acquired one.
1280 */
1281 if (sdev->sdev_state == SDEV_DEL)
1282 return;
1283
James Bottomley860dc732009-11-19 17:48:29 -05001284 if (sdev->is_visible) {
1285 if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0)
1286 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001287
James Bottomley860dc732009-11-19 17:48:29 -05001288 bsg_unregister_queue(sdev->request_queue);
1289 device_unregister(&sdev->sdev_dev);
1290 transport_remove_device(dev);
Christoph Hellwig086b91d2015-08-27 14:16:57 +02001291 scsi_dh_remove_device(sdev);
Bart Van Asschee619e6c2015-11-20 14:11:01 -08001292 device_del(dev);
1293 } else
1294 put_device(&sdev->sdev_dev);
Bart Van Asscheb4854622012-06-29 15:36:07 +00001295
1296 /*
1297 * Stop accepting new requests and wait until all queuecommand() and
1298 * scsi_run_queue() invocations have finished before tearing down the
1299 * device.
1300 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301 scsi_device_set_state(sdev, SDEV_DEL);
Bart Van Asscheb4854622012-06-29 15:36:07 +00001302 blk_cleanup_queue(sdev->request_queue);
1303 cancel_work_sync(&sdev->requeue_work);
1304
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305 if (sdev->host->hostt->slave_destroy)
1306 sdev->host->hostt->slave_destroy(sdev);
James Bottomleydf133c22005-11-06 11:47:08 -06001307 transport_destroy_device(dev);
James Bottomley86cbfb52011-04-22 10:39:59 -05001308
James Bottomleye63ed0d2014-01-21 07:00:50 -08001309 /*
1310 * Paired with the kref_get() in scsi_sysfs_initialize(). We have
1311 * remoed sysfs visibility from the device, so make the target
1312 * invisible if this was the last device underneath it.
1313 */
1314 scsi_target_reap(scsi_target(sdev));
1315
James Bottomleydf133c22005-11-06 11:47:08 -06001316 put_device(dev);
Alan Stern903f4fe2005-07-26 10:20:53 -04001317}
1318
1319/**
1320 * scsi_remove_device - unregister a device from the scsi bus
1321 * @sdev: scsi_device to unregister
1322 **/
1323void scsi_remove_device(struct scsi_device *sdev)
1324{
Alan Stern54195002005-09-15 21:52:51 -04001325 struct Scsi_Host *shost = sdev->host;
1326
Arjan van de Ven0b950672006-01-11 13:16:10 +01001327 mutex_lock(&shost->scan_mutex);
Alan Stern903f4fe2005-07-26 10:20:53 -04001328 __scsi_remove_device(sdev);
Arjan van de Ven0b950672006-01-11 13:16:10 +01001329 mutex_unlock(&shost->scan_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330}
1331EXPORT_SYMBOL(scsi_remove_device);
1332
Adrian Bunk44818ef2007-07-09 11:59:59 -07001333static void __scsi_remove_target(struct scsi_target *starget)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001334{
1335 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1336 unsigned long flags;
Alan Sterna64358d2005-07-26 10:27:10 -04001337 struct scsi_device *sdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001338
1339 spin_lock_irqsave(shost->host_lock, flags);
Alan Sterna64358d2005-07-26 10:27:10 -04001340 restart:
1341 list_for_each_entry(sdev, &shost->__devices, siblings) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342 if (sdev->channel != starget->channel ||
Alan Sterna64358d2005-07-26 10:27:10 -04001343 sdev->id != starget->id ||
Christof Schmitt546ae792010-10-06 13:19:44 +02001344 scsi_device_get(sdev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345 continue;
1346 spin_unlock_irqrestore(shost->host_lock, flags);
1347 scsi_remove_device(sdev);
Christof Schmitt546ae792010-10-06 13:19:44 +02001348 scsi_device_put(sdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349 spin_lock_irqsave(shost->host_lock, flags);
Alan Sterna64358d2005-07-26 10:27:10 -04001350 goto restart;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351 }
1352 spin_unlock_irqrestore(shost->host_lock, flags);
mochel@digitalimplant.org20b1e672005-03-24 19:03:59 -08001353}
1354
Linus Torvalds1da177e2005-04-16 15:20:36 -07001355/**
1356 * scsi_remove_target - try to remove a target and all its devices
1357 * @dev: generic starget or parent of generic stargets to be removed
1358 *
1359 * Note: This is slightly racy. It is possible that if the user
1360 * requests the addition of another device then the target won't be
1361 * removed.
1362 */
1363void scsi_remove_target(struct device *dev)
1364{
Dan Williams3b661a92012-06-21 23:47:28 -07001365 struct Scsi_Host *shost = dev_to_shost(dev->parent);
Johannes Thumshirn305c2e72016-04-05 11:50:45 +02001366 struct scsi_target *starget;
Dan Williams3b661a92012-06-21 23:47:28 -07001367 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368
Christoph Hellwig40998192015-10-19 16:35:46 +02001369restart:
Dan Williams3b661a92012-06-21 23:47:28 -07001370 spin_lock_irqsave(shost->host_lock, flags);
1371 list_for_each_entry(starget, &shost->__targets, siblings) {
James Bottomley90a88d62016-02-10 08:03:26 -08001372 if (starget->state == STARGET_DEL ||
Johannes Thumshirn305c2e72016-04-05 11:50:45 +02001373 starget->state == STARGET_REMOVE)
Dan Williams3b661a92012-06-21 23:47:28 -07001374 continue;
1375 if (starget->dev.parent == dev || &starget->dev == dev) {
James Bottomleye63ed0d2014-01-21 07:00:50 -08001376 kref_get(&starget->reap_ref);
Johannes Thumshirnf05795d2016-04-05 11:50:44 +02001377 starget->state = STARGET_REMOVE;
Dan Williamsbc3f02a2012-08-28 22:12:10 -07001378 spin_unlock_irqrestore(shost->host_lock, flags);
Dan Williamsbc3f02a2012-08-28 22:12:10 -07001379 __scsi_remove_target(starget);
Christoph Hellwig40998192015-10-19 16:35:46 +02001380 scsi_target_reap(starget);
1381 goto restart;
Dan Williams3b661a92012-06-21 23:47:28 -07001382 }
1383 }
1384 spin_unlock_irqrestore(shost->host_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385}
1386EXPORT_SYMBOL(scsi_remove_target);
1387
1388int scsi_register_driver(struct device_driver *drv)
1389{
1390 drv->bus = &scsi_bus_type;
1391
1392 return driver_register(drv);
1393}
1394EXPORT_SYMBOL(scsi_register_driver);
1395
1396int scsi_register_interface(struct class_interface *intf)
1397{
1398 intf->class = &sdev_class;
1399
1400 return class_interface_register(intf);
1401}
1402EXPORT_SYMBOL(scsi_register_interface);
1403
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404/**
1405 * scsi_sysfs_add_host - add scsi host to subsystem
1406 * @shost: scsi host struct to add to subsystem
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407 **/
1408int scsi_sysfs_add_host(struct Scsi_Host *shost)
1409{
1410 int error, i;
1411
Hannes Reineckef7120a42008-03-18 14:32:28 +01001412 /* add host specific attributes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413 if (shost->hostt->shost_attrs) {
1414 for (i = 0; shost->hostt->shost_attrs[i]; i++) {
Tony Jonesee959b02008-02-22 00:13:36 +01001415 error = device_create_file(&shost->shost_dev,
Hannes Reineckef7120a42008-03-18 14:32:28 +01001416 shost->hostt->shost_attrs[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001417 if (error)
1418 return error;
1419 }
1420 }
1421
1422 transport_register_device(&shost->shost_gendev);
James Bottomleyd52b3812008-01-05 09:38:30 -06001423 transport_configure_device(&shost->shost_gendev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424 return 0;
1425}
1426
Kay Sieversbfd12942007-09-11 17:00:14 +02001427static struct device_type scsi_dev_type = {
1428 .name = "scsi_device",
1429 .release = scsi_device_dev_release,
1430 .groups = scsi_sdev_attr_groups,
1431};
1432
Linus Torvalds1da177e2005-04-16 15:20:36 -07001433void scsi_sysfs_device_initialize(struct scsi_device *sdev)
1434{
1435 unsigned long flags;
1436 struct Scsi_Host *shost = sdev->host;
1437 struct scsi_target *starget = sdev->sdev_target;
1438
1439 device_initialize(&sdev->sdev_gendev);
1440 sdev->sdev_gendev.bus = &scsi_bus_type;
Kay Sieversbfd12942007-09-11 17:00:14 +02001441 sdev->sdev_gendev.type = &scsi_dev_type;
Hannes Reinecke9cb78c12014-06-25 15:27:36 +02001442 dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%llu",
Kay Sievers71610f52008-12-03 22:41:36 +01001443 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1444
Tony Jonesee959b02008-02-22 00:13:36 +01001445 device_initialize(&sdev->sdev_dev);
James Bottomley37e6ba02009-10-02 13:30:08 -05001446 sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev);
Tony Jonesee959b02008-02-22 00:13:36 +01001447 sdev->sdev_dev.class = &sdev_class;
Hannes Reinecke9cb78c12014-06-25 15:27:36 +02001448 dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%llu",
Kay Sievers71610f52008-12-03 22:41:36 +01001449 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
Alan Stern50c4e962014-09-02 11:35:50 -04001450 /*
1451 * Get a default scsi_level from the target (derived from sibling
1452 * devices). This is the best we can do for guessing how to set
1453 * sdev->lun_in_cdb for the initial INQUIRY command. For LUN 0 the
1454 * setting doesn't matter, because all the bits are zero anyway.
1455 * But it does matter for higher LUNs.
1456 */
Alan Stern7c9d6f12007-01-08 11:12:32 -05001457 sdev->scsi_level = starget->scsi_level;
Alan Stern50c4e962014-09-02 11:35:50 -04001458 if (sdev->scsi_level <= SCSI_2 &&
1459 sdev->scsi_level != SCSI_UNKNOWN &&
1460 !shost->no_scsi2_lun_in_cdb)
1461 sdev->lun_in_cdb = 1;
1462
Linus Torvalds1da177e2005-04-16 15:20:36 -07001463 transport_setup_device(&sdev->sdev_gendev);
1464 spin_lock_irqsave(shost->host_lock, flags);
1465 list_add_tail(&sdev->same_target_siblings, &starget->devices);
1466 list_add_tail(&sdev->siblings, &shost->__devices);
1467 spin_unlock_irqrestore(shost->host_lock, flags);
James Bottomleye63ed0d2014-01-21 07:00:50 -08001468 /*
1469 * device can now only be removed via __scsi_remove_device() so hold
1470 * the target. Target will be held in CREATED state until something
1471 * beneath it becomes visible (in which case it moves to RUNNING)
1472 */
1473 kref_get(&starget->reap_ref);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001474}
1475
1476int scsi_is_sdev_device(const struct device *dev)
1477{
Kay Sievers13ba9bc2007-09-26 19:54:49 +02001478 return dev->type == &scsi_dev_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001479}
1480EXPORT_SYMBOL(scsi_is_sdev_device);
1481
1482/* A blank transport template that is used in drivers that don't
1483 * yet implement Transport Attributes */
1484struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, };