Commit | Line | Data |
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457c8996 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* |
3 | * scsi_sysfs.c | |
4 | * | |
5 | * SCSI sysfs interface routines. | |
6 | * | |
7 | * Created to pull SCSI mid layer sysfs routines into one file. | |
8 | */ | |
9 | ||
1da177e4 | 10 | #include <linux/module.h> |
5a0e3ad6 | 11 | #include <linux/slab.h> |
1da177e4 LT |
12 | #include <linux/init.h> |
13 | #include <linux/blkdev.h> | |
14 | #include <linux/device.h> | |
bc4f2401 | 15 | #include <linux/pm_runtime.h> |
ead09dd3 | 16 | #include <linux/bsg.h> |
1da177e4 LT |
17 | |
18 | #include <scsi/scsi.h> | |
19 | #include <scsi/scsi_device.h> | |
20 | #include <scsi/scsi_host.h> | |
21 | #include <scsi/scsi_tcq.h> | |
41f95dd2 | 22 | #include <scsi/scsi_dh.h> |
1da177e4 | 23 | #include <scsi/scsi_transport.h> |
44818efb | 24 | #include <scsi/scsi_driver.h> |
345e2960 | 25 | #include <scsi/scsi_devinfo.h> |
1da177e4 LT |
26 | |
27 | #include "scsi_priv.h" | |
28 | #include "scsi_logging.h" | |
29 | ||
517bcc2b | 30 | static const struct device_type scsi_dev_type; |
b0ed4336 | 31 | |
0ad78200 | 32 | static const struct { |
1da177e4 LT |
33 | enum scsi_device_state value; |
34 | char *name; | |
35 | } sdev_states[] = { | |
36 | { SDEV_CREATED, "created" }, | |
37 | { SDEV_RUNNING, "running" }, | |
38 | { SDEV_CANCEL, "cancel" }, | |
39 | { SDEV_DEL, "deleted" }, | |
40 | { SDEV_QUIESCE, "quiesce" }, | |
41 | { SDEV_OFFLINE, "offline" }, | |
1b8d2620 | 42 | { SDEV_TRANSPORT_OFFLINE, "transport-offline" }, |
1da177e4 | 43 | { SDEV_BLOCK, "blocked" }, |
6f4267e3 | 44 | { SDEV_CREATED_BLOCK, "created-blocked" }, |
1da177e4 LT |
45 | }; |
46 | ||
47 | const char *scsi_device_state_name(enum scsi_device_state state) | |
48 | { | |
49 | int i; | |
50 | char *name = NULL; | |
51 | ||
6391a113 | 52 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
53 | if (sdev_states[i].value == state) { |
54 | name = sdev_states[i].name; | |
55 | break; | |
56 | } | |
57 | } | |
58 | return name; | |
59 | } | |
60 | ||
0ad78200 | 61 | static const struct { |
d3301874 MA |
62 | enum scsi_host_state value; |
63 | char *name; | |
64 | } shost_states[] = { | |
65 | { SHOST_CREATED, "created" }, | |
66 | { SHOST_RUNNING, "running" }, | |
67 | { SHOST_CANCEL, "cancel" }, | |
68 | { SHOST_DEL, "deleted" }, | |
69 | { SHOST_RECOVERY, "recovery" }, | |
939647ee JB |
70 | { SHOST_CANCEL_RECOVERY, "cancel/recovery" }, |
71 | { SHOST_DEL_RECOVERY, "deleted/recovery", }, | |
d3301874 MA |
72 | }; |
73 | const char *scsi_host_state_name(enum scsi_host_state state) | |
74 | { | |
75 | int i; | |
76 | char *name = NULL; | |
77 | ||
6391a113 | 78 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
79 | if (shost_states[i].value == state) { |
80 | name = shost_states[i].name; | |
81 | break; | |
82 | } | |
83 | } | |
84 | return name; | |
85 | } | |
86 | ||
d78540da | 87 | #ifdef CONFIG_SCSI_DH |
77c9df96 HR |
88 | static const struct { |
89 | unsigned char value; | |
90 | char *name; | |
91 | } sdev_access_states[] = { | |
92 | { SCSI_ACCESS_STATE_OPTIMAL, "active/optimized" }, | |
93 | { SCSI_ACCESS_STATE_ACTIVE, "active/non-optimized" }, | |
94 | { SCSI_ACCESS_STATE_STANDBY, "standby" }, | |
95 | { SCSI_ACCESS_STATE_UNAVAILABLE, "unavailable" }, | |
96 | { SCSI_ACCESS_STATE_LBA, "lba-dependent" }, | |
97 | { SCSI_ACCESS_STATE_OFFLINE, "offline" }, | |
98 | { SCSI_ACCESS_STATE_TRANSITIONING, "transitioning" }, | |
99 | }; | |
100 | ||
d78540da | 101 | static const char *scsi_access_state_name(unsigned char state) |
77c9df96 HR |
102 | { |
103 | int i; | |
104 | char *name = NULL; | |
105 | ||
106 | for (i = 0; i < ARRAY_SIZE(sdev_access_states); i++) { | |
107 | if (sdev_access_states[i].value == state) { | |
108 | name = sdev_access_states[i].name; | |
109 | break; | |
110 | } | |
111 | } | |
112 | return name; | |
113 | } | |
d78540da | 114 | #endif |
77c9df96 | 115 | |
9cb78c16 | 116 | static int check_set(unsigned long long *val, char *src) |
1da177e4 LT |
117 | { |
118 | char *last; | |
119 | ||
3991e460 | 120 | if (strcmp(src, "-") == 0) { |
1da177e4 LT |
121 | *val = SCAN_WILD_CARD; |
122 | } else { | |
123 | /* | |
124 | * Doesn't check for int overflow | |
125 | */ | |
9cb78c16 | 126 | *val = simple_strtoull(src, &last, 0); |
1da177e4 LT |
127 | if (*last != '\0') |
128 | return 1; | |
129 | } | |
130 | return 0; | |
131 | } | |
132 | ||
133 | static int scsi_scan(struct Scsi_Host *shost, const char *str) | |
134 | { | |
9cb78c16 HR |
135 | char s1[15], s2[15], s3[17], junk; |
136 | unsigned long long channel, id, lun; | |
1da177e4 LT |
137 | int res; |
138 | ||
9cb78c16 | 139 | res = sscanf(str, "%10s %10s %16s %c", s1, s2, s3, &junk); |
1da177e4 LT |
140 | if (res != 3) |
141 | return -EINVAL; | |
142 | if (check_set(&channel, s1)) | |
143 | return -EINVAL; | |
144 | if (check_set(&id, s2)) | |
145 | return -EINVAL; | |
146 | if (check_set(&lun, s3)) | |
147 | return -EINVAL; | |
e02f3f59 CH |
148 | if (shost->transportt->user_scan) |
149 | res = shost->transportt->user_scan(shost, channel, id, lun); | |
150 | else | |
1d645088 HR |
151 | res = scsi_scan_host_selected(shost, channel, id, lun, |
152 | SCSI_SCAN_MANUAL); | |
1da177e4 LT |
153 | return res; |
154 | } | |
155 | ||
156 | /* | |
157 | * shost_show_function: macro to create an attr function that can be used to | |
158 | * show a non-bit field. | |
159 | */ | |
160 | #define shost_show_function(name, field, format_string) \ | |
161 | static ssize_t \ | |
ee959b00 TJ |
162 | show_##name (struct device *dev, struct device_attribute *attr, \ |
163 | char *buf) \ | |
1da177e4 | 164 | { \ |
ee959b00 | 165 | struct Scsi_Host *shost = class_to_shost(dev); \ |
1da177e4 LT |
166 | return snprintf (buf, 20, format_string, shost->field); \ |
167 | } | |
168 | ||
169 | /* | |
170 | * shost_rd_attr: macro to create a function and attribute variable for a | |
171 | * read only field. | |
172 | */ | |
173 | #define shost_rd_attr2(name, field, format_string) \ | |
174 | shost_show_function(name, field, format_string) \ | |
ee959b00 | 175 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); |
1da177e4 LT |
176 | |
177 | #define shost_rd_attr(field, format_string) \ | |
178 | shost_rd_attr2(field, field, format_string) | |
179 | ||
180 | /* | |
181 | * Create the actual show/store functions and data structures. | |
182 | */ | |
183 | ||
ee959b00 TJ |
184 | static ssize_t |
185 | store_scan(struct device *dev, struct device_attribute *attr, | |
186 | const char *buf, size_t count) | |
1da177e4 | 187 | { |
ee959b00 | 188 | struct Scsi_Host *shost = class_to_shost(dev); |
1da177e4 LT |
189 | int res; |
190 | ||
191 | res = scsi_scan(shost, buf); | |
192 | if (res == 0) | |
193 | res = count; | |
194 | return res; | |
195 | }; | |
ee959b00 | 196 | static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); |
1da177e4 | 197 | |
d3301874 | 198 | static ssize_t |
ee959b00 TJ |
199 | store_shost_state(struct device *dev, struct device_attribute *attr, |
200 | const char *buf, size_t count) | |
d3301874 MA |
201 | { |
202 | int i; | |
ee959b00 | 203 | struct Scsi_Host *shost = class_to_shost(dev); |
d3301874 MA |
204 | enum scsi_host_state state = 0; |
205 | ||
6391a113 | 206 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
207 | const int len = strlen(shost_states[i].name); |
208 | if (strncmp(shost_states[i].name, buf, len) == 0 && | |
209 | buf[len] == '\n') { | |
210 | state = shost_states[i].value; | |
211 | break; | |
212 | } | |
213 | } | |
214 | if (!state) | |
215 | return -EINVAL; | |
216 | ||
217 | if (scsi_host_set_state(shost, state)) | |
218 | return -EINVAL; | |
219 | return count; | |
220 | } | |
221 | ||
222 | static ssize_t | |
ee959b00 | 223 | show_shost_state(struct device *dev, struct device_attribute *attr, char *buf) |
d3301874 | 224 | { |
ee959b00 | 225 | struct Scsi_Host *shost = class_to_shost(dev); |
d3301874 MA |
226 | const char *name = scsi_host_state_name(shost->shost_state); |
227 | ||
228 | if (!name) | |
229 | return -EINVAL; | |
230 | ||
231 | return snprintf(buf, 20, "%s\n", name); | |
232 | } | |
233 | ||
ee959b00 | 234 | /* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */ |
d78540da | 235 | static struct device_attribute dev_attr_hstate = |
ee959b00 | 236 | __ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state); |
d3301874 | 237 | |
5dc2b89e FT |
238 | static ssize_t |
239 | show_shost_mode(unsigned int mode, char *buf) | |
240 | { | |
241 | ssize_t len = 0; | |
242 | ||
243 | if (mode & MODE_INITIATOR) | |
244 | len = sprintf(buf, "%s", "Initiator"); | |
245 | ||
246 | if (mode & MODE_TARGET) | |
247 | len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target"); | |
248 | ||
249 | len += sprintf(buf + len, "\n"); | |
250 | ||
251 | return len; | |
252 | } | |
253 | ||
ee959b00 TJ |
254 | static ssize_t |
255 | show_shost_supported_mode(struct device *dev, struct device_attribute *attr, | |
256 | char *buf) | |
5dc2b89e | 257 | { |
ee959b00 | 258 | struct Scsi_Host *shost = class_to_shost(dev); |
7a39ac3f | 259 | unsigned int supported_mode = shost->hostt->supported_mode; |
5dc2b89e | 260 | |
7a39ac3f JB |
261 | if (supported_mode == MODE_UNKNOWN) |
262 | /* by default this should be initiator */ | |
263 | supported_mode = MODE_INITIATOR; | |
264 | ||
265 | return show_shost_mode(supported_mode, buf); | |
5dc2b89e FT |
266 | } |
267 | ||
ee959b00 | 268 | static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL); |
5dc2b89e | 269 | |
ee959b00 TJ |
270 | static ssize_t |
271 | show_shost_active_mode(struct device *dev, | |
272 | struct device_attribute *attr, char *buf) | |
5dc2b89e | 273 | { |
ee959b00 | 274 | struct Scsi_Host *shost = class_to_shost(dev); |
5dc2b89e FT |
275 | |
276 | if (shost->active_mode == MODE_UNKNOWN) | |
277 | return snprintf(buf, 20, "unknown\n"); | |
278 | else | |
279 | return show_shost_mode(shost->active_mode, buf); | |
280 | } | |
281 | ||
ee959b00 | 282 | static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL); |
5dc2b89e | 283 | |
072f19b4 | 284 | static int check_reset_type(const char *str) |
29443691 | 285 | { |
072f19b4 | 286 | if (sysfs_streq(str, "adapter")) |
29443691 | 287 | return SCSI_ADAPTER_RESET; |
072f19b4 | 288 | else if (sysfs_streq(str, "firmware")) |
29443691 VC |
289 | return SCSI_FIRMWARE_RESET; |
290 | else | |
291 | return 0; | |
292 | } | |
293 | ||
294 | static ssize_t | |
295 | store_host_reset(struct device *dev, struct device_attribute *attr, | |
296 | const char *buf, size_t count) | |
297 | { | |
298 | struct Scsi_Host *shost = class_to_shost(dev); | |
31435de9 | 299 | const struct scsi_host_template *sht = shost->hostt; |
29443691 | 300 | int ret = -EINVAL; |
29443691 VC |
301 | int type; |
302 | ||
072f19b4 | 303 | type = check_reset_type(buf); |
29443691 VC |
304 | if (!type) |
305 | goto exit_store_host_reset; | |
306 | ||
307 | if (sht->host_reset) | |
308 | ret = sht->host_reset(shost, type); | |
92227b8d | 309 | else |
310 | ret = -EOPNOTSUPP; | |
29443691 VC |
311 | |
312 | exit_store_host_reset: | |
313 | if (ret == 0) | |
314 | ret = count; | |
315 | return ret; | |
316 | } | |
317 | ||
318 | static DEVICE_ATTR(host_reset, S_IWUSR, NULL, store_host_reset); | |
319 | ||
b4562022 HR |
320 | static ssize_t |
321 | show_shost_eh_deadline(struct device *dev, | |
322 | struct device_attribute *attr, char *buf) | |
323 | { | |
324 | struct Scsi_Host *shost = class_to_shost(dev); | |
325 | ||
bb3b621a RM |
326 | if (shost->eh_deadline == -1) |
327 | return snprintf(buf, strlen("off") + 2, "off\n"); | |
328 | return sprintf(buf, "%u\n", shost->eh_deadline / HZ); | |
b4562022 HR |
329 | } |
330 | ||
331 | static ssize_t | |
332 | store_shost_eh_deadline(struct device *dev, struct device_attribute *attr, | |
333 | const char *buf, size_t count) | |
334 | { | |
335 | struct Scsi_Host *shost = class_to_shost(dev); | |
336 | int ret = -EINVAL; | |
bb3b621a | 337 | unsigned long deadline, flags; |
b4562022 | 338 | |
ad469a57 HR |
339 | if (shost->transportt && |
340 | (shost->transportt->eh_strategy_handler || | |
341 | !shost->hostt->eh_host_reset_handler)) | |
b4562022 HR |
342 | return ret; |
343 | ||
bb3b621a RM |
344 | if (!strncmp(buf, "off", strlen("off"))) |
345 | deadline = -1; | |
346 | else { | |
347 | ret = kstrtoul(buf, 10, &deadline); | |
348 | if (ret) | |
349 | return ret; | |
350 | if (deadline * HZ > UINT_MAX) | |
351 | return -EINVAL; | |
352 | } | |
353 | ||
354 | spin_lock_irqsave(shost->host_lock, flags); | |
355 | if (scsi_host_in_recovery(shost)) | |
356 | ret = -EBUSY; | |
357 | else { | |
358 | if (deadline == -1) | |
359 | shost->eh_deadline = -1; | |
360 | else | |
b4562022 | 361 | shost->eh_deadline = deadline * HZ; |
bb3b621a RM |
362 | |
363 | ret = count; | |
b4562022 | 364 | } |
bb3b621a RM |
365 | spin_unlock_irqrestore(shost->host_lock, flags); |
366 | ||
b4562022 HR |
367 | return ret; |
368 | } | |
369 | ||
370 | static DEVICE_ATTR(eh_deadline, S_IRUGO | S_IWUSR, show_shost_eh_deadline, store_shost_eh_deadline); | |
371 | ||
1da177e4 | 372 | shost_rd_attr(unique_id, "%u\n"); |
1da177e4 | 373 | shost_rd_attr(cmd_per_lun, "%hd\n"); |
88392820 | 374 | shost_rd_attr(can_queue, "%d\n"); |
1da177e4 | 375 | shost_rd_attr(sg_tablesize, "%hu\n"); |
13f05c8d | 376 | shost_rd_attr(sg_prot_tablesize, "%hu\n"); |
4469f987 MP |
377 | shost_rd_attr(prot_capabilities, "%u\n"); |
378 | shost_rd_attr(prot_guard_type, "%hd\n"); | |
1da177e4 LT |
379 | shost_rd_attr2(proc_name, hostt->proc_name, "%s\n"); |
380 | ||
74665016 CH |
381 | static ssize_t |
382 | show_host_busy(struct device *dev, struct device_attribute *attr, char *buf) | |
383 | { | |
384 | struct Scsi_Host *shost = class_to_shost(dev); | |
c84b023a | 385 | return snprintf(buf, 20, "%d\n", scsi_host_busy(shost)); |
74665016 CH |
386 | } |
387 | static DEVICE_ATTR(host_busy, S_IRUGO, show_host_busy, NULL); | |
388 | ||
f664a3cc JA |
389 | static ssize_t |
390 | show_use_blk_mq(struct device *dev, struct device_attribute *attr, char *buf) | |
391 | { | |
392 | return sprintf(buf, "1\n"); | |
393 | } | |
394 | static DEVICE_ATTR(use_blk_mq, S_IRUGO, show_use_blk_mq, NULL); | |
395 | ||
64f1501b JG |
396 | static ssize_t |
397 | show_nr_hw_queues(struct device *dev, struct device_attribute *attr, char *buf) | |
398 | { | |
399 | struct Scsi_Host *shost = class_to_shost(dev); | |
400 | struct blk_mq_tag_set *tag_set = &shost->tag_set; | |
401 | ||
402 | return snprintf(buf, 20, "%d\n", tag_set->nr_hw_queues); | |
403 | } | |
404 | static DEVICE_ATTR(nr_hw_queues, S_IRUGO, show_nr_hw_queues, NULL); | |
405 | ||
f7120a4f | 406 | static struct attribute *scsi_sysfs_shost_attrs[] = { |
d285203c | 407 | &dev_attr_use_blk_mq.attr, |
f7120a4f HR |
408 | &dev_attr_unique_id.attr, |
409 | &dev_attr_host_busy.attr, | |
410 | &dev_attr_cmd_per_lun.attr, | |
411 | &dev_attr_can_queue.attr, | |
412 | &dev_attr_sg_tablesize.attr, | |
13f05c8d | 413 | &dev_attr_sg_prot_tablesize.attr, |
f7120a4f HR |
414 | &dev_attr_proc_name.attr, |
415 | &dev_attr_scan.attr, | |
416 | &dev_attr_hstate.attr, | |
417 | &dev_attr_supported_mode.attr, | |
418 | &dev_attr_active_mode.attr, | |
4469f987 MP |
419 | &dev_attr_prot_capabilities.attr, |
420 | &dev_attr_prot_guard_type.attr, | |
29443691 | 421 | &dev_attr_host_reset.attr, |
b4562022 | 422 | &dev_attr_eh_deadline.attr, |
64f1501b | 423 | &dev_attr_nr_hw_queues.attr, |
f7120a4f HR |
424 | NULL |
425 | }; | |
426 | ||
0a84486d | 427 | static const struct attribute_group scsi_shost_attr_group = { |
f7120a4f HR |
428 | .attrs = scsi_sysfs_shost_attrs, |
429 | }; | |
430 | ||
0a84486d BVA |
431 | const struct attribute_group *scsi_shost_groups[] = { |
432 | &scsi_shost_attr_group, | |
433 | NULL | |
434 | }; | |
435 | ||
ee959b00 | 436 | static void scsi_device_cls_release(struct device *class_dev) |
1da177e4 LT |
437 | { |
438 | struct scsi_device *sdev; | |
439 | ||
440 | sdev = class_to_sdev(class_dev); | |
441 | put_device(&sdev->sdev_gendev); | |
442 | } | |
443 | ||
f93ed747 | 444 | static void scsi_device_dev_release(struct device *dev) |
1da177e4 | 445 | { |
f93ed747 | 446 | struct scsi_device *sdev = to_scsi_device(dev); |
1da177e4 | 447 | struct device *parent; |
a341cd0f | 448 | struct list_head *this, *tmp; |
ccf1e004 | 449 | struct scsi_vpd *vpd_pg80 = NULL, *vpd_pg83 = NULL; |
d188b067 | 450 | struct scsi_vpd *vpd_pg0 = NULL, *vpd_pg89 = NULL; |
e60ac0b9 | 451 | struct scsi_vpd *vpd_pgb0 = NULL, *vpd_pgb1 = NULL, *vpd_pgb2 = NULL; |
96b171d6 | 452 | struct scsi_vpd *vpd_pgb7 = NULL; |
1da177e4 | 453 | unsigned long flags; |
f2b85040 | 454 | |
2542fc95 BVA |
455 | might_sleep(); |
456 | ||
23695e41 JN |
457 | scsi_dh_release_device(sdev); |
458 | ||
65f27f38 | 459 | parent = sdev->sdev_gendev.parent; |
1da177e4 LT |
460 | |
461 | spin_lock_irqsave(sdev->host->host_lock, flags); | |
1da177e4 LT |
462 | list_del(&sdev->siblings); |
463 | list_del(&sdev->same_target_siblings); | |
464 | list_del(&sdev->starved_entry); | |
465 | spin_unlock_irqrestore(sdev->host->host_lock, flags); | |
466 | ||
a341cd0f JG |
467 | cancel_work_sync(&sdev->event_work); |
468 | ||
469 | list_for_each_safe(this, tmp, &sdev->event_list) { | |
470 | struct scsi_event *evt; | |
471 | ||
472 | evt = list_entry(this, struct scsi_event, node); | |
473 | list_del(&evt->node); | |
474 | kfree(evt); | |
475 | } | |
476 | ||
e73e079b | 477 | blk_put_queue(sdev->request_queue); |
86cbfb56 JB |
478 | /* NULL queue means the device can't be used */ |
479 | sdev->request_queue = NULL; | |
1da177e4 | 480 | |
020b0f0a ML |
481 | sbitmap_free(&sdev->budget_map); |
482 | ||
ccf1e004 | 483 | mutex_lock(&sdev->inquiry_mutex); |
ef2cc88e LT |
484 | vpd_pg0 = rcu_replace_pointer(sdev->vpd_pg0, vpd_pg0, |
485 | lockdep_is_held(&sdev->inquiry_mutex)); | |
c0eaf15c PM |
486 | vpd_pg80 = rcu_replace_pointer(sdev->vpd_pg80, vpd_pg80, |
487 | lockdep_is_held(&sdev->inquiry_mutex)); | |
488 | vpd_pg83 = rcu_replace_pointer(sdev->vpd_pg83, vpd_pg83, | |
489 | lockdep_is_held(&sdev->inquiry_mutex)); | |
ef2cc88e LT |
490 | vpd_pg89 = rcu_replace_pointer(sdev->vpd_pg89, vpd_pg89, |
491 | lockdep_is_held(&sdev->inquiry_mutex)); | |
e60ac0b9 MP |
492 | vpd_pgb0 = rcu_replace_pointer(sdev->vpd_pgb0, vpd_pgb0, |
493 | lockdep_is_held(&sdev->inquiry_mutex)); | |
494 | vpd_pgb1 = rcu_replace_pointer(sdev->vpd_pgb1, vpd_pgb1, | |
495 | lockdep_is_held(&sdev->inquiry_mutex)); | |
496 | vpd_pgb2 = rcu_replace_pointer(sdev->vpd_pgb2, vpd_pgb2, | |
497 | lockdep_is_held(&sdev->inquiry_mutex)); | |
96b171d6 BVA |
498 | vpd_pgb7 = rcu_replace_pointer(sdev->vpd_pgb7, vpd_pgb7, |
499 | lockdep_is_held(&sdev->inquiry_mutex)); | |
ccf1e004 BVA |
500 | mutex_unlock(&sdev->inquiry_mutex); |
501 | ||
d188b067 RA |
502 | if (vpd_pg0) |
503 | kfree_rcu(vpd_pg0, rcu); | |
ccf1e004 BVA |
504 | if (vpd_pg83) |
505 | kfree_rcu(vpd_pg83, rcu); | |
506 | if (vpd_pg80) | |
507 | kfree_rcu(vpd_pg80, rcu); | |
d188b067 RA |
508 | if (vpd_pg89) |
509 | kfree_rcu(vpd_pg89, rcu); | |
e60ac0b9 MP |
510 | if (vpd_pgb0) |
511 | kfree_rcu(vpd_pgb0, rcu); | |
512 | if (vpd_pgb1) | |
513 | kfree_rcu(vpd_pgb1, rcu); | |
514 | if (vpd_pgb2) | |
515 | kfree_rcu(vpd_pgb2, rcu); | |
96b171d6 BVA |
516 | if (vpd_pgb7) |
517 | kfree_rcu(vpd_pgb7, rcu); | |
1da177e4 LT |
518 | kfree(sdev->inquiry); |
519 | kfree(sdev); | |
520 | ||
521 | if (parent) | |
522 | put_device(parent); | |
65110b21 JB |
523 | } |
524 | ||
52c1da39 | 525 | static struct class sdev_class = { |
1da177e4 | 526 | .name = "scsi_device", |
ee959b00 | 527 | .dev_release = scsi_device_cls_release, |
1da177e4 LT |
528 | }; |
529 | ||
530 | /* all probing is done in the individual ->probe routines */ | |
531 | static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) | |
532 | { | |
b0ed4336 HR |
533 | struct scsi_device *sdp; |
534 | ||
535 | if (dev->type != &scsi_dev_type) | |
536 | return 0; | |
537 | ||
538 | sdp = to_scsi_device(dev); | |
1da177e4 LT |
539 | if (sdp->no_uld_attach) |
540 | return 0; | |
541 | return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; | |
542 | } | |
543 | ||
2a81ada3 | 544 | static int scsi_bus_uevent(const struct device *dev, struct kobj_uevent_env *env) |
d7b8bcb0 | 545 | { |
2a81ada3 | 546 | const struct scsi_device *sdev; |
1f42ea7b JB |
547 | |
548 | if (dev->type != &scsi_dev_type) | |
549 | return 0; | |
550 | ||
551 | sdev = to_scsi_device(dev); | |
d7b8bcb0 | 552 | |
7eff2e7a | 553 | add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type); |
d7b8bcb0 MT |
554 | return 0; |
555 | } | |
556 | ||
a0bcad23 | 557 | const struct bus_type scsi_bus_type = { |
1da177e4 LT |
558 | .name = "scsi", |
559 | .match = scsi_bus_match, | |
d7b8bcb0 | 560 | .uevent = scsi_bus_uevent, |
aa338601 | 561 | #ifdef CONFIG_PM |
db5bd1e0 | 562 | .pm = &scsi_bus_pm_ops, |
e6da54d8 | 563 | #endif |
1da177e4 LT |
564 | }; |
565 | ||
566 | int scsi_sysfs_register(void) | |
567 | { | |
568 | int error; | |
569 | ||
570 | error = bus_register(&scsi_bus_type); | |
571 | if (!error) { | |
572 | error = class_register(&sdev_class); | |
573 | if (error) | |
574 | bus_unregister(&scsi_bus_type); | |
575 | } | |
576 | ||
577 | return error; | |
578 | } | |
579 | ||
580 | void scsi_sysfs_unregister(void) | |
581 | { | |
582 | class_unregister(&sdev_class); | |
583 | bus_unregister(&scsi_bus_type); | |
584 | } | |
585 | ||
586 | /* | |
587 | * sdev_show_function: macro to create an attr function that can be used to | |
588 | * show a non-bit field. | |
589 | */ | |
590 | #define sdev_show_function(field, format_string) \ | |
591 | static ssize_t \ | |
ee959b00 TJ |
592 | sdev_show_##field (struct device *dev, struct device_attribute *attr, \ |
593 | char *buf) \ | |
1da177e4 LT |
594 | { \ |
595 | struct scsi_device *sdev; \ | |
596 | sdev = to_scsi_device(dev); \ | |
597 | return snprintf (buf, 20, format_string, sdev->field); \ | |
598 | } \ | |
599 | ||
600 | /* | |
601 | * sdev_rd_attr: macro to create a function and attribute variable for a | |
602 | * read only field. | |
603 | */ | |
604 | #define sdev_rd_attr(field, format_string) \ | |
605 | sdev_show_function(field, format_string) \ | |
606 | static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); | |
607 | ||
608 | ||
609 | /* | |
160e7f67 | 610 | * sdev_rw_attr: create a function and attribute variable for a |
1da177e4 LT |
611 | * read/write field. |
612 | */ | |
613 | #define sdev_rw_attr(field, format_string) \ | |
614 | sdev_show_function(field, format_string) \ | |
615 | \ | |
616 | static ssize_t \ | |
ee959b00 TJ |
617 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
618 | const char *buf, size_t count) \ | |
1da177e4 LT |
619 | { \ |
620 | struct scsi_device *sdev; \ | |
621 | sdev = to_scsi_device(dev); \ | |
160e7f67 | 622 | sscanf (buf, format_string, &sdev->field); \ |
1da177e4 LT |
623 | return count; \ |
624 | } \ | |
625 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
626 | ||
627 | /* Currently we don't export bit fields, but we might in future, | |
628 | * so leave this code in */ | |
629 | #if 0 | |
630 | /* | |
631 | * sdev_rd_attr: create a function and attribute variable for a | |
632 | * read/write bit field. | |
633 | */ | |
634 | #define sdev_rw_attr_bit(field) \ | |
635 | sdev_show_function(field, "%d\n") \ | |
636 | \ | |
637 | static ssize_t \ | |
ee959b00 TJ |
638 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
639 | const char *buf, size_t count) \ | |
1da177e4 LT |
640 | { \ |
641 | int ret; \ | |
642 | struct scsi_device *sdev; \ | |
643 | ret = scsi_sdev_check_buf_bit(buf); \ | |
644 | if (ret >= 0) { \ | |
645 | sdev = to_scsi_device(dev); \ | |
646 | sdev->field = ret; \ | |
647 | ret = count; \ | |
648 | } \ | |
649 | return ret; \ | |
650 | } \ | |
651 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
652 | ||
653 | /* | |
654 | * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", | |
655 | * else return -EINVAL. | |
656 | */ | |
657 | static int scsi_sdev_check_buf_bit(const char *buf) | |
658 | { | |
659 | if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { | |
660 | if (buf[0] == '1') | |
661 | return 1; | |
662 | else if (buf[0] == '0') | |
663 | return 0; | |
664 | else | |
665 | return -EINVAL; | |
666 | } else | |
667 | return -EINVAL; | |
668 | } | |
669 | #endif | |
670 | /* | |
671 | * Create the actual show/store functions and data structures. | |
672 | */ | |
1da177e4 LT |
673 | sdev_rd_attr (type, "%d\n"); |
674 | sdev_rd_attr (scsi_level, "%d\n"); | |
675 | sdev_rd_attr (vendor, "%.8s\n"); | |
676 | sdev_rd_attr (model, "%.16s\n"); | |
677 | sdev_rd_attr (rev, "%.4s\n"); | |
62488520 | 678 | sdev_rd_attr (cdl_supported, "%d\n"); |
1da177e4 | 679 | |
71e75c97 CH |
680 | static ssize_t |
681 | sdev_show_device_busy(struct device *dev, struct device_attribute *attr, | |
682 | char *buf) | |
683 | { | |
684 | struct scsi_device *sdev = to_scsi_device(dev); | |
8278807a | 685 | return snprintf(buf, 20, "%d\n", scsi_device_busy(sdev)); |
71e75c97 CH |
686 | } |
687 | static DEVICE_ATTR(device_busy, S_IRUGO, sdev_show_device_busy, NULL); | |
688 | ||
cd9070c9 CH |
689 | static ssize_t |
690 | sdev_show_device_blocked(struct device *dev, struct device_attribute *attr, | |
691 | char *buf) | |
692 | { | |
693 | struct scsi_device *sdev = to_scsi_device(dev); | |
694 | return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_blocked)); | |
695 | } | |
696 | static DEVICE_ATTR(device_blocked, S_IRUGO, sdev_show_device_blocked, NULL); | |
697 | ||
242f9dcb JA |
698 | /* |
699 | * TODO: can we make these symlinks to the block layer ones? | |
700 | */ | |
1da177e4 | 701 | static ssize_t |
10523b3b | 702 | sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
703 | { |
704 | struct scsi_device *sdev; | |
705 | sdev = to_scsi_device(dev); | |
242f9dcb | 706 | return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ); |
1da177e4 LT |
707 | } |
708 | ||
709 | static ssize_t | |
ee959b00 TJ |
710 | sdev_store_timeout (struct device *dev, struct device_attribute *attr, |
711 | const char *buf, size_t count) | |
1da177e4 LT |
712 | { |
713 | struct scsi_device *sdev; | |
714 | int timeout; | |
715 | sdev = to_scsi_device(dev); | |
716 | sscanf (buf, "%d\n", &timeout); | |
242f9dcb | 717 | blk_queue_rq_timeout(sdev->request_queue, timeout * HZ); |
1da177e4 LT |
718 | return count; |
719 | } | |
720 | static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); | |
721 | ||
0816c925 MP |
722 | static ssize_t |
723 | sdev_show_eh_timeout(struct device *dev, struct device_attribute *attr, char *buf) | |
724 | { | |
725 | struct scsi_device *sdev; | |
726 | sdev = to_scsi_device(dev); | |
727 | return snprintf(buf, 20, "%u\n", sdev->eh_timeout / HZ); | |
728 | } | |
729 | ||
730 | static ssize_t | |
731 | sdev_store_eh_timeout(struct device *dev, struct device_attribute *attr, | |
732 | const char *buf, size_t count) | |
733 | { | |
734 | struct scsi_device *sdev; | |
735 | unsigned int eh_timeout; | |
736 | int err; | |
737 | ||
738 | if (!capable(CAP_SYS_ADMIN)) | |
739 | return -EACCES; | |
740 | ||
741 | sdev = to_scsi_device(dev); | |
742 | err = kstrtouint(buf, 10, &eh_timeout); | |
743 | if (err) | |
744 | return err; | |
745 | sdev->eh_timeout = eh_timeout * HZ; | |
746 | ||
747 | return count; | |
748 | } | |
749 | static DEVICE_ATTR(eh_timeout, S_IRUGO | S_IWUSR, sdev_show_eh_timeout, sdev_store_eh_timeout); | |
750 | ||
1da177e4 | 751 | static ssize_t |
ee959b00 TJ |
752 | store_rescan_field (struct device *dev, struct device_attribute *attr, |
753 | const char *buf, size_t count) | |
1da177e4 | 754 | { |
79519528 | 755 | scsi_rescan_device(to_scsi_device(dev)); |
1da177e4 LT |
756 | return count; |
757 | } | |
758 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); | |
759 | ||
ee959b00 TJ |
760 | static ssize_t |
761 | sdev_store_delete(struct device *dev, struct device_attribute *attr, | |
762 | const char *buf, size_t count) | |
1da177e4 | 763 | { |
0ee223b2 | 764 | struct kernfs_node *kn; |
77c30128 YY |
765 | struct scsi_device *sdev = to_scsi_device(dev); |
766 | ||
767 | /* | |
768 | * We need to try to get module, avoiding the module been removed | |
769 | * during delete. | |
770 | */ | |
771 | if (scsi_device_get(sdev)) | |
772 | return -ENODEV; | |
0ee223b2 BVA |
773 | |
774 | kn = sysfs_break_active_protection(&dev->kobj, &attr->attr); | |
775 | WARN_ON_ONCE(!kn); | |
776 | /* | |
777 | * Concurrent writes into the "delete" sysfs attribute may trigger | |
778 | * concurrent calls to device_remove_file() and scsi_remove_device(). | |
779 | * device_remove_file() handles concurrent removal calls by | |
780 | * serializing these and by ignoring the second and later removal | |
781 | * attempts. Concurrent calls of scsi_remove_device() are | |
782 | * serialized. The second and later calls of scsi_remove_device() are | |
783 | * ignored because the first call of that function changes the device | |
784 | * state into SDEV_DEL. | |
785 | */ | |
786 | device_remove_file(dev, attr); | |
77c30128 | 787 | scsi_remove_device(sdev); |
0ee223b2 BVA |
788 | if (kn) |
789 | sysfs_unbreak_active_protection(kn); | |
77c30128 | 790 | scsi_device_put(sdev); |
1da177e4 LT |
791 | return count; |
792 | }; | |
793 | static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); | |
794 | ||
795 | static ssize_t | |
ee959b00 TJ |
796 | store_state_field(struct device *dev, struct device_attribute *attr, |
797 | const char *buf, size_t count) | |
1da177e4 | 798 | { |
0db6ca8a | 799 | int i, ret; |
1da177e4 LT |
800 | struct scsi_device *sdev = to_scsi_device(dev); |
801 | enum scsi_device_state state = 0; | |
4edd8cd4 | 802 | bool rescan_dev = false; |
1da177e4 | 803 | |
6391a113 | 804 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
805 | const int len = strlen(sdev_states[i].name); |
806 | if (strncmp(sdev_states[i].name, buf, len) == 0 && | |
807 | buf[len] == '\n') { | |
808 | state = sdev_states[i].value; | |
809 | break; | |
810 | } | |
811 | } | |
ac88c1f6 BVA |
812 | switch (state) { |
813 | case SDEV_RUNNING: | |
814 | case SDEV_OFFLINE: | |
815 | break; | |
816 | default: | |
1da177e4 | 817 | return -EINVAL; |
ac88c1f6 | 818 | } |
1da177e4 | 819 | |
0db6ca8a | 820 | mutex_lock(&sdev->state_mutex); |
2331ce61 US |
821 | switch (sdev->sdev_state) { |
822 | case SDEV_RUNNING: | |
823 | case SDEV_OFFLINE: | |
824 | break; | |
825 | default: | |
826 | mutex_unlock(&sdev->state_mutex); | |
827 | return -EINVAL; | |
828 | } | |
4edd8cd4 | 829 | if (sdev->sdev_state == SDEV_RUNNING && state == SDEV_RUNNING) { |
eb97545d | 830 | ret = 0; |
4edd8cd4 MC |
831 | } else { |
832 | ret = scsi_device_set_state(sdev, state); | |
833 | if (ret == 0 && state == SDEV_RUNNING) | |
834 | rescan_dev = true; | |
835 | } | |
836 | mutex_unlock(&sdev->state_mutex); | |
837 | ||
838 | if (rescan_dev) { | |
839 | /* | |
840 | * If the device state changes to SDEV_RUNNING, we need to | |
841 | * run the queue to avoid I/O hang, and rescan the device | |
842 | * to revalidate it. Running the queue first is necessary | |
843 | * because another thread may be waiting inside | |
844 | * blk_mq_freeze_queue_wait() and because that call may be | |
845 | * waiting for pending I/O to finish. | |
846 | */ | |
70fc085c | 847 | blk_mq_run_hw_queues(sdev->request_queue, true); |
79519528 | 848 | scsi_rescan_device(sdev); |
f0f82e24 | 849 | } |
0db6ca8a BVA |
850 | |
851 | return ret == 0 ? count : -EINVAL; | |
1da177e4 LT |
852 | } |
853 | ||
854 | static ssize_t | |
10523b3b | 855 | show_state_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
856 | { |
857 | struct scsi_device *sdev = to_scsi_device(dev); | |
858 | const char *name = scsi_device_state_name(sdev->sdev_state); | |
859 | ||
860 | if (!name) | |
861 | return -EINVAL; | |
862 | ||
863 | return snprintf(buf, 20, "%s\n", name); | |
864 | } | |
865 | ||
866 | static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); | |
867 | ||
868 | static ssize_t | |
ee959b00 TJ |
869 | show_queue_type_field(struct device *dev, struct device_attribute *attr, |
870 | char *buf) | |
1da177e4 LT |
871 | { |
872 | struct scsi_device *sdev = to_scsi_device(dev); | |
873 | const char *name = "none"; | |
874 | ||
609aa22f | 875 | if (sdev->simple_tags) |
1da177e4 LT |
876 | name = "simple"; |
877 | ||
878 | return snprintf(buf, 20, "%s\n", name); | |
879 | } | |
880 | ||
276b20d0 HR |
881 | static ssize_t |
882 | store_queue_type_field(struct device *dev, struct device_attribute *attr, | |
883 | const char *buf, size_t count) | |
884 | { | |
885 | struct scsi_device *sdev = to_scsi_device(dev); | |
276b20d0 | 886 | |
efc3c1df | 887 | if (!sdev->tagged_supported) |
276b20d0 | 888 | return -EINVAL; |
efc3c1df CH |
889 | |
890 | sdev_printk(KERN_INFO, sdev, | |
891 | "ignoring write to deprecated queue_type attribute"); | |
276b20d0 HR |
892 | return count; |
893 | } | |
894 | ||
895 | static DEVICE_ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, | |
896 | store_queue_type_field); | |
1da177e4 | 897 | |
b3ae8780 HR |
898 | #define sdev_vpd_pg_attr(_page) \ |
899 | static ssize_t \ | |
900 | show_vpd_##_page(struct file *filp, struct kobject *kobj, \ | |
901 | struct bin_attribute *bin_attr, \ | |
902 | char *buf, loff_t off, size_t count) \ | |
903 | { \ | |
9e7bd945 | 904 | struct device *dev = kobj_to_dev(kobj); \ |
b3ae8780 | 905 | struct scsi_device *sdev = to_scsi_device(dev); \ |
ccf1e004 BVA |
906 | struct scsi_vpd *vpd_page; \ |
907 | int ret = -EINVAL; \ | |
908 | \ | |
09e2b0b1 | 909 | rcu_read_lock(); \ |
ccf1e004 BVA |
910 | vpd_page = rcu_dereference(sdev->vpd_##_page); \ |
911 | if (vpd_page) \ | |
912 | ret = memory_read_from_buffer(buf, count, &off, \ | |
913 | vpd_page->data, vpd_page->len); \ | |
09e2b0b1 | 914 | rcu_read_unlock(); \ |
ccf1e004 | 915 | return ret; \ |
b3ae8780 HR |
916 | } \ |
917 | static struct bin_attribute dev_attr_vpd_##_page = { \ | |
918 | .attr = {.name = __stringify(vpd_##_page), .mode = S_IRUGO }, \ | |
919 | .size = 0, \ | |
920 | .read = show_vpd_##_page, \ | |
921 | }; | |
922 | ||
923 | sdev_vpd_pg_attr(pg83); | |
924 | sdev_vpd_pg_attr(pg80); | |
d188b067 | 925 | sdev_vpd_pg_attr(pg89); |
e60ac0b9 MP |
926 | sdev_vpd_pg_attr(pgb0); |
927 | sdev_vpd_pg_attr(pgb1); | |
928 | sdev_vpd_pg_attr(pgb2); | |
96b171d6 | 929 | sdev_vpd_pg_attr(pgb7); |
d188b067 | 930 | sdev_vpd_pg_attr(pg0); |
1da177e4 | 931 | |
92e6246c JT |
932 | static ssize_t show_inquiry(struct file *filep, struct kobject *kobj, |
933 | struct bin_attribute *bin_attr, | |
934 | char *buf, loff_t off, size_t count) | |
935 | { | |
9e7bd945 | 936 | struct device *dev = kobj_to_dev(kobj); |
92e6246c JT |
937 | struct scsi_device *sdev = to_scsi_device(dev); |
938 | ||
939 | if (!sdev->inquiry) | |
940 | return -EINVAL; | |
941 | ||
942 | return memory_read_from_buffer(buf, count, &off, sdev->inquiry, | |
943 | sdev->inquiry_len); | |
944 | } | |
945 | ||
946 | static struct bin_attribute dev_attr_inquiry = { | |
947 | .attr = { | |
948 | .name = "inquiry", | |
949 | .mode = S_IRUGO, | |
950 | }, | |
951 | .size = 0, | |
952 | .read = show_inquiry, | |
953 | }; | |
954 | ||
1da177e4 | 955 | static ssize_t |
b3ae8780 HR |
956 | show_iostat_counterbits(struct device *dev, struct device_attribute *attr, |
957 | char *buf) | |
1da177e4 LT |
958 | { |
959 | return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); | |
960 | } | |
961 | ||
962 | static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); | |
963 | ||
964 | #define show_sdev_iostat(field) \ | |
965 | static ssize_t \ | |
ee959b00 TJ |
966 | show_iostat_##field(struct device *dev, struct device_attribute *attr, \ |
967 | char *buf) \ | |
1da177e4 LT |
968 | { \ |
969 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
970 | unsigned long long count = atomic_read(&sdev->field); \ | |
971 | return snprintf(buf, 20, "0x%llx\n", count); \ | |
972 | } \ | |
973 | static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) | |
974 | ||
975 | show_sdev_iostat(iorequest_cnt); | |
976 | show_sdev_iostat(iodone_cnt); | |
977 | show_sdev_iostat(ioerr_cnt); | |
48517eef | 978 | show_sdev_iostat(iotmo_cnt); |
1da177e4 | 979 | |
d7b8bcb0 MT |
980 | static ssize_t |
981 | sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf) | |
982 | { | |
983 | struct scsi_device *sdev; | |
984 | sdev = to_scsi_device(dev); | |
985 | return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type); | |
986 | } | |
987 | static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL); | |
1da177e4 | 988 | |
a341cd0f JG |
989 | #define DECLARE_EVT_SHOW(name, Cap_name) \ |
990 | static ssize_t \ | |
991 | sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \ | |
ee959b00 | 992 | char *buf) \ |
a341cd0f JG |
993 | { \ |
994 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
995 | int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\ | |
996 | return snprintf(buf, 20, "%d\n", val); \ | |
997 | } | |
998 | ||
999 | #define DECLARE_EVT_STORE(name, Cap_name) \ | |
1000 | static ssize_t \ | |
ee959b00 | 1001 | sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\ |
a341cd0f JG |
1002 | const char *buf, size_t count) \ |
1003 | { \ | |
1004 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
1005 | int val = simple_strtoul(buf, NULL, 0); \ | |
1006 | if (val == 0) \ | |
1007 | clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
1008 | else if (val == 1) \ | |
1009 | set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
1010 | else \ | |
1011 | return -EINVAL; \ | |
1012 | return count; \ | |
1013 | } | |
1014 | ||
1015 | #define DECLARE_EVT(name, Cap_name) \ | |
1016 | DECLARE_EVT_SHOW(name, Cap_name) \ | |
1017 | DECLARE_EVT_STORE(name, Cap_name) \ | |
1018 | static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \ | |
1019 | sdev_store_evt_##name); | |
1020 | #define REF_EVT(name) &dev_attr_evt_##name.attr | |
1021 | ||
1022 | DECLARE_EVT(media_change, MEDIA_CHANGE) | |
279afdfe EM |
1023 | DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED) |
1024 | DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED) | |
1025 | DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED) | |
1026 | DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED) | |
1027 | DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED) | |
a341cd0f | 1028 | |
ee959b00 | 1029 | static ssize_t |
276b20d0 HR |
1030 | sdev_store_queue_depth(struct device *dev, struct device_attribute *attr, |
1031 | const char *buf, size_t count) | |
1da177e4 LT |
1032 | { |
1033 | int depth, retval; | |
1034 | struct scsi_device *sdev = to_scsi_device(dev); | |
31435de9 | 1035 | const struct scsi_host_template *sht = sdev->host->hostt; |
1da177e4 LT |
1036 | |
1037 | if (!sht->change_queue_depth) | |
1038 | return -EINVAL; | |
1039 | ||
1040 | depth = simple_strtoul(buf, NULL, 0); | |
1041 | ||
1278dd68 | 1042 | if (depth < 1 || depth > sdev->host->can_queue) |
1da177e4 LT |
1043 | return -EINVAL; |
1044 | ||
db5ed4df | 1045 | retval = sht->change_queue_depth(sdev, depth); |
1da177e4 LT |
1046 | if (retval < 0) |
1047 | return retval; | |
1048 | ||
4a84067d VD |
1049 | sdev->max_queue_depth = sdev->queue_depth; |
1050 | ||
1da177e4 LT |
1051 | return count; |
1052 | } | |
276b20d0 | 1053 | sdev_show_function(queue_depth, "%d\n"); |
1da177e4 | 1054 | |
276b20d0 HR |
1055 | static DEVICE_ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, |
1056 | sdev_store_queue_depth); | |
1da177e4 | 1057 | |
248d4fe9 HR |
1058 | static ssize_t |
1059 | sdev_show_wwid(struct device *dev, struct device_attribute *attr, | |
1060 | char *buf) | |
1061 | { | |
1062 | struct scsi_device *sdev = to_scsi_device(dev); | |
1063 | ssize_t count; | |
1064 | ||
1065 | count = scsi_vpd_lun_id(sdev, buf, PAGE_SIZE); | |
1066 | if (count > 0) { | |
1067 | buf[count] = '\n'; | |
1068 | count++; | |
1069 | } | |
1070 | return count; | |
1071 | } | |
1072 | static DEVICE_ATTR(wwid, S_IRUGO, sdev_show_wwid, NULL); | |
1073 | ||
093b8886 | 1074 | #define BLIST_FLAG_NAME(name) \ |
14098803 | 1075 | [const_ilog2((__force __u64)BLIST_##name)] = #name |
345e2960 HR |
1076 | static const char *const sdev_bflags_name[] = { |
1077 | #include "scsi_devinfo_tbl.c" | |
1078 | }; | |
1079 | #undef BLIST_FLAG_NAME | |
1080 | ||
1081 | static ssize_t | |
1082 | sdev_show_blacklist(struct device *dev, struct device_attribute *attr, | |
1083 | char *buf) | |
1084 | { | |
1085 | struct scsi_device *sdev = to_scsi_device(dev); | |
1086 | int i; | |
1087 | ssize_t len = 0; | |
1088 | ||
1089 | for (i = 0; i < sizeof(sdev->sdev_bflags) * BITS_PER_BYTE; i++) { | |
1090 | const char *name = NULL; | |
1091 | ||
093b8886 | 1092 | if (!(sdev->sdev_bflags & (__force blist_flags_t)BIT(i))) |
345e2960 HR |
1093 | continue; |
1094 | if (i < ARRAY_SIZE(sdev_bflags_name) && sdev_bflags_name[i]) | |
1095 | name = sdev_bflags_name[i]; | |
1096 | ||
1097 | if (name) | |
81546b32 TI |
1098 | len += scnprintf(buf + len, PAGE_SIZE - len, |
1099 | "%s%s", len ? " " : "", name); | |
345e2960 | 1100 | else |
81546b32 TI |
1101 | len += scnprintf(buf + len, PAGE_SIZE - len, |
1102 | "%sINVALID_BIT(%d)", len ? " " : "", i); | |
345e2960 HR |
1103 | } |
1104 | if (len) | |
81546b32 | 1105 | len += scnprintf(buf + len, PAGE_SIZE - len, "\n"); |
345e2960 HR |
1106 | return len; |
1107 | } | |
1108 | static DEVICE_ATTR(blacklist, S_IRUGO, sdev_show_blacklist, NULL); | |
1109 | ||
41f95dd2 HR |
1110 | #ifdef CONFIG_SCSI_DH |
1111 | static ssize_t | |
1112 | sdev_show_dh_state(struct device *dev, struct device_attribute *attr, | |
1113 | char *buf) | |
1114 | { | |
1115 | struct scsi_device *sdev = to_scsi_device(dev); | |
1116 | ||
1117 | if (!sdev->handler) | |
1118 | return snprintf(buf, 20, "detached\n"); | |
1119 | ||
1120 | return snprintf(buf, 20, "%s\n", sdev->handler->name); | |
1121 | } | |
1122 | ||
1123 | static ssize_t | |
1124 | sdev_store_dh_state(struct device *dev, struct device_attribute *attr, | |
1125 | const char *buf, size_t count) | |
1126 | { | |
1127 | struct scsi_device *sdev = to_scsi_device(dev); | |
1128 | int err = -EINVAL; | |
1129 | ||
1130 | if (sdev->sdev_state == SDEV_CANCEL || | |
1131 | sdev->sdev_state == SDEV_DEL) | |
1132 | return -ENODEV; | |
1133 | ||
1134 | if (!sdev->handler) { | |
1135 | /* | |
1136 | * Attach to a device handler | |
1137 | */ | |
1138 | err = scsi_dh_attach(sdev->request_queue, buf); | |
1139 | } else if (!strncmp(buf, "activate", 8)) { | |
1140 | /* | |
1141 | * Activate a device handler | |
1142 | */ | |
1143 | if (sdev->handler->activate) | |
1144 | err = sdev->handler->activate(sdev, NULL, NULL); | |
1145 | else | |
1146 | err = 0; | |
1147 | } else if (!strncmp(buf, "detach", 6)) { | |
1148 | /* | |
1149 | * Detach from a device handler | |
1150 | */ | |
1151 | sdev_printk(KERN_WARNING, sdev, | |
1152 | "can't detach handler %s.\n", | |
1153 | sdev->handler->name); | |
1154 | err = -EINVAL; | |
1155 | } | |
1156 | ||
1157 | return err < 0 ? err : count; | |
1158 | } | |
1159 | ||
1160 | static DEVICE_ATTR(dh_state, S_IRUGO | S_IWUSR, sdev_show_dh_state, | |
1161 | sdev_store_dh_state); | |
77c9df96 HR |
1162 | |
1163 | static ssize_t | |
1164 | sdev_show_access_state(struct device *dev, | |
1165 | struct device_attribute *attr, | |
1166 | char *buf) | |
1167 | { | |
1168 | struct scsi_device *sdev = to_scsi_device(dev); | |
1169 | unsigned char access_state; | |
1170 | const char *access_state_name; | |
1171 | ||
1172 | if (!sdev->handler) | |
1173 | return -EINVAL; | |
1174 | ||
1175 | access_state = (sdev->access_state & SCSI_ACCESS_STATE_MASK); | |
1176 | access_state_name = scsi_access_state_name(access_state); | |
1177 | ||
1178 | return sprintf(buf, "%s\n", | |
1179 | access_state_name ? access_state_name : "unknown"); | |
1180 | } | |
1181 | static DEVICE_ATTR(access_state, S_IRUGO, sdev_show_access_state, NULL); | |
1182 | ||
1183 | static ssize_t | |
1184 | sdev_show_preferred_path(struct device *dev, | |
1185 | struct device_attribute *attr, | |
1186 | char *buf) | |
1187 | { | |
1188 | struct scsi_device *sdev = to_scsi_device(dev); | |
1189 | ||
1190 | if (!sdev->handler) | |
1191 | return -EINVAL; | |
1192 | ||
1193 | if (sdev->access_state & SCSI_ACCESS_STATE_PREFERRED) | |
1194 | return sprintf(buf, "1\n"); | |
1195 | else | |
1196 | return sprintf(buf, "0\n"); | |
1197 | } | |
1198 | static DEVICE_ATTR(preferred_path, S_IRUGO, sdev_show_preferred_path, NULL); | |
41f95dd2 HR |
1199 | #endif |
1200 | ||
4a84067d VD |
1201 | static ssize_t |
1202 | sdev_show_queue_ramp_up_period(struct device *dev, | |
1203 | struct device_attribute *attr, | |
1204 | char *buf) | |
1205 | { | |
1206 | struct scsi_device *sdev; | |
1207 | sdev = to_scsi_device(dev); | |
1208 | return snprintf(buf, 20, "%u\n", | |
1209 | jiffies_to_msecs(sdev->queue_ramp_up_period)); | |
1210 | } | |
1211 | ||
1212 | static ssize_t | |
1213 | sdev_store_queue_ramp_up_period(struct device *dev, | |
1214 | struct device_attribute *attr, | |
1215 | const char *buf, size_t count) | |
1216 | { | |
1217 | struct scsi_device *sdev = to_scsi_device(dev); | |
f7c65af5 | 1218 | unsigned int period; |
4a84067d | 1219 | |
f7c65af5 | 1220 | if (kstrtouint(buf, 10, &period)) |
4a84067d VD |
1221 | return -EINVAL; |
1222 | ||
1223 | sdev->queue_ramp_up_period = msecs_to_jiffies(period); | |
5cb9b40d | 1224 | return count; |
4a84067d VD |
1225 | } |
1226 | ||
276b20d0 HR |
1227 | static DEVICE_ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR, |
1228 | sdev_show_queue_ramp_up_period, | |
1229 | sdev_store_queue_ramp_up_period); | |
4a84067d | 1230 | |
1b22cfb1 DLM |
1231 | static ssize_t sdev_show_cdl_enable(struct device *dev, |
1232 | struct device_attribute *attr, char *buf) | |
1233 | { | |
1234 | struct scsi_device *sdev = to_scsi_device(dev); | |
1235 | ||
1236 | return sysfs_emit(buf, "%d\n", (int)sdev->cdl_enable); | |
1237 | } | |
1238 | ||
1239 | static ssize_t sdev_store_cdl_enable(struct device *dev, | |
1240 | struct device_attribute *attr, | |
1241 | const char *buf, size_t count) | |
1242 | { | |
1243 | int ret; | |
1244 | bool v; | |
1245 | ||
1246 | if (kstrtobool(buf, &v)) | |
1247 | return -EINVAL; | |
1248 | ||
1249 | ret = scsi_cdl_enable(to_scsi_device(dev), v); | |
1250 | if (ret) | |
1251 | return ret; | |
1252 | ||
1253 | return count; | |
1254 | } | |
1255 | static DEVICE_ATTR(cdl_enable, S_IRUGO | S_IWUSR, | |
1256 | sdev_show_cdl_enable, sdev_store_cdl_enable); | |
1257 | ||
276b20d0 HR |
1258 | static umode_t scsi_sdev_attr_is_visible(struct kobject *kobj, |
1259 | struct attribute *attr, int i) | |
1da177e4 | 1260 | { |
9e7bd945 | 1261 | struct device *dev = kobj_to_dev(kobj); |
1da177e4 | 1262 | struct scsi_device *sdev = to_scsi_device(dev); |
1da177e4 | 1263 | |
1da177e4 | 1264 | |
276b20d0 HR |
1265 | if (attr == &dev_attr_queue_depth.attr && |
1266 | !sdev->host->hostt->change_queue_depth) | |
1267 | return S_IRUGO; | |
1da177e4 | 1268 | |
276b20d0 HR |
1269 | if (attr == &dev_attr_queue_ramp_up_period.attr && |
1270 | !sdev->host->hostt->change_queue_depth) | |
1271 | return 0; | |
1da177e4 | 1272 | |
276b20d0 | 1273 | return attr->mode; |
1da177e4 LT |
1274 | } |
1275 | ||
7e47976b HR |
1276 | static umode_t scsi_sdev_bin_attr_is_visible(struct kobject *kobj, |
1277 | struct bin_attribute *attr, int i) | |
1278 | { | |
9e7bd945 | 1279 | struct device *dev = kobj_to_dev(kobj); |
7e47976b HR |
1280 | struct scsi_device *sdev = to_scsi_device(dev); |
1281 | ||
1282 | ||
d188b067 RA |
1283 | if (attr == &dev_attr_vpd_pg0 && !sdev->vpd_pg0) |
1284 | return 0; | |
1285 | ||
7e47976b HR |
1286 | if (attr == &dev_attr_vpd_pg80 && !sdev->vpd_pg80) |
1287 | return 0; | |
1288 | ||
68887582 | 1289 | if (attr == &dev_attr_vpd_pg83 && !sdev->vpd_pg83) |
7e47976b HR |
1290 | return 0; |
1291 | ||
d188b067 RA |
1292 | if (attr == &dev_attr_vpd_pg89 && !sdev->vpd_pg89) |
1293 | return 0; | |
1294 | ||
e60ac0b9 MP |
1295 | if (attr == &dev_attr_vpd_pgb0 && !sdev->vpd_pgb0) |
1296 | return 0; | |
1297 | ||
1298 | if (attr == &dev_attr_vpd_pgb1 && !sdev->vpd_pgb1) | |
1299 | return 0; | |
1300 | ||
1301 | if (attr == &dev_attr_vpd_pgb2 && !sdev->vpd_pgb2) | |
1302 | return 0; | |
1303 | ||
96b171d6 BVA |
1304 | if (attr == &dev_attr_vpd_pgb7 && !sdev->vpd_pgb7) |
1305 | return 0; | |
1306 | ||
7e47976b HR |
1307 | return S_IRUGO; |
1308 | } | |
1309 | ||
276b20d0 HR |
1310 | /* Default template for device attributes. May NOT be modified */ |
1311 | static struct attribute *scsi_sdev_attrs[] = { | |
1312 | &dev_attr_device_blocked.attr, | |
1313 | &dev_attr_type.attr, | |
1314 | &dev_attr_scsi_level.attr, | |
1315 | &dev_attr_device_busy.attr, | |
1316 | &dev_attr_vendor.attr, | |
1317 | &dev_attr_model.attr, | |
1318 | &dev_attr_rev.attr, | |
1319 | &dev_attr_rescan.attr, | |
1320 | &dev_attr_delete.attr, | |
1321 | &dev_attr_state.attr, | |
1322 | &dev_attr_timeout.attr, | |
1323 | &dev_attr_eh_timeout.attr, | |
1324 | &dev_attr_iocounterbits.attr, | |
1325 | &dev_attr_iorequest_cnt.attr, | |
1326 | &dev_attr_iodone_cnt.attr, | |
1327 | &dev_attr_ioerr_cnt.attr, | |
48517eef | 1328 | &dev_attr_iotmo_cnt.attr, |
276b20d0 HR |
1329 | &dev_attr_modalias.attr, |
1330 | &dev_attr_queue_depth.attr, | |
1331 | &dev_attr_queue_type.attr, | |
248d4fe9 | 1332 | &dev_attr_wwid.attr, |
345e2960 | 1333 | &dev_attr_blacklist.attr, |
41f95dd2 HR |
1334 | #ifdef CONFIG_SCSI_DH |
1335 | &dev_attr_dh_state.attr, | |
77c9df96 HR |
1336 | &dev_attr_access_state.attr, |
1337 | &dev_attr_preferred_path.attr, | |
41f95dd2 | 1338 | #endif |
276b20d0 | 1339 | &dev_attr_queue_ramp_up_period.attr, |
62488520 | 1340 | &dev_attr_cdl_supported.attr, |
1b22cfb1 | 1341 | &dev_attr_cdl_enable.attr, |
276b20d0 HR |
1342 | REF_EVT(media_change), |
1343 | REF_EVT(inquiry_change_reported), | |
1344 | REF_EVT(capacity_change_reported), | |
1345 | REF_EVT(soft_threshold_reached), | |
1346 | REF_EVT(mode_parameter_change_reported), | |
1347 | REF_EVT(lun_change_reported), | |
1348 | NULL | |
1349 | }; | |
1350 | ||
b3ae8780 | 1351 | static struct bin_attribute *scsi_sdev_bin_attrs[] = { |
d188b067 | 1352 | &dev_attr_vpd_pg0, |
b3ae8780 HR |
1353 | &dev_attr_vpd_pg83, |
1354 | &dev_attr_vpd_pg80, | |
d188b067 | 1355 | &dev_attr_vpd_pg89, |
e60ac0b9 MP |
1356 | &dev_attr_vpd_pgb0, |
1357 | &dev_attr_vpd_pgb1, | |
1358 | &dev_attr_vpd_pgb2, | |
96b171d6 | 1359 | &dev_attr_vpd_pgb7, |
92e6246c | 1360 | &dev_attr_inquiry, |
b3ae8780 HR |
1361 | NULL |
1362 | }; | |
276b20d0 HR |
1363 | static struct attribute_group scsi_sdev_attr_group = { |
1364 | .attrs = scsi_sdev_attrs, | |
b3ae8780 | 1365 | .bin_attrs = scsi_sdev_bin_attrs, |
276b20d0 | 1366 | .is_visible = scsi_sdev_attr_is_visible, |
7e47976b | 1367 | .is_bin_visible = scsi_sdev_bin_attr_is_visible, |
276b20d0 HR |
1368 | }; |
1369 | ||
1370 | static const struct attribute_group *scsi_sdev_attr_groups[] = { | |
1371 | &scsi_sdev_attr_group, | |
1372 | NULL | |
1373 | }; | |
1374 | ||
643eb2d9 JB |
1375 | static int scsi_target_add(struct scsi_target *starget) |
1376 | { | |
1377 | int error; | |
1378 | ||
1379 | if (starget->state != STARGET_CREATED) | |
1380 | return 0; | |
1381 | ||
1382 | error = device_add(&starget->dev); | |
1383 | if (error) { | |
1384 | dev_err(&starget->dev, "target device_add failed, error %d\n", error); | |
643eb2d9 JB |
1385 | return error; |
1386 | } | |
1387 | transport_add_device(&starget->dev); | |
1388 | starget->state = STARGET_RUNNING; | |
1389 | ||
bc4f2401 AS |
1390 | pm_runtime_set_active(&starget->dev); |
1391 | pm_runtime_enable(&starget->dev); | |
1392 | device_enable_async_suspend(&starget->dev); | |
1393 | ||
643eb2d9 JB |
1394 | return 0; |
1395 | } | |
1396 | ||
1da177e4 LT |
1397 | /** |
1398 | * scsi_sysfs_add_sdev - add scsi device to sysfs | |
1399 | * @sdev: scsi_device to add | |
1400 | * | |
1401 | * Return value: | |
1402 | * 0 on Success / non-zero on Failure | |
1403 | **/ | |
1404 | int scsi_sysfs_add_sdev(struct scsi_device *sdev) | |
1405 | { | |
92c4b58b | 1406 | int error; |
643eb2d9 | 1407 | struct scsi_target *starget = sdev->sdev_target; |
1da177e4 | 1408 | |
643eb2d9 JB |
1409 | error = scsi_target_add(starget); |
1410 | if (error) | |
1411 | return error; | |
1412 | ||
1413 | transport_configure_device(&starget->dev); | |
bc4f2401 | 1414 | |
4cb077d9 | 1415 | device_enable_async_suspend(&sdev->sdev_gendev); |
bc4f2401 AS |
1416 | scsi_autopm_get_target(starget); |
1417 | pm_runtime_set_active(&sdev->sdev_gendev); | |
c74f8056 SC |
1418 | if (!sdev->rpm_autosuspend) |
1419 | pm_runtime_forbid(&sdev->sdev_gendev); | |
bc4f2401 AS |
1420 | pm_runtime_enable(&sdev->sdev_gendev); |
1421 | scsi_autopm_put_target(starget); | |
1422 | ||
bc4f2401 AS |
1423 | scsi_autopm_get_device(sdev); |
1424 | ||
2930f817 | 1425 | scsi_dh_add_device(sdev); |
086b91d0 | 1426 | |
4cd2459c HR |
1427 | error = device_add(&sdev->sdev_gendev); |
1428 | if (error) { | |
1429 | sdev_printk(KERN_INFO, sdev, | |
1430 | "failed to add device: %d\n", error); | |
4cd2459c HR |
1431 | return error; |
1432 | } | |
1433 | ||
4cb077d9 | 1434 | device_enable_async_suspend(&sdev->sdev_dev); |
ee959b00 | 1435 | error = device_add(&sdev->sdev_dev); |
1da177e4 | 1436 | if (error) { |
73d8c34f AS |
1437 | sdev_printk(KERN_INFO, sdev, |
1438 | "failed to add class device: %d\n", error); | |
860dc736 | 1439 | device_del(&sdev->sdev_gendev); |
ee37e09d | 1440 | return error; |
1da177e4 | 1441 | } |
860dc736 JB |
1442 | transport_add_device(&sdev->sdev_gendev); |
1443 | sdev->is_visible = 1; | |
1da177e4 | 1444 | |
ead09dd3 CH |
1445 | if (IS_ENABLED(CONFIG_BLK_DEV_BSG)) { |
1446 | sdev->bsg_dev = scsi_bsg_register_queue(sdev); | |
1447 | if (IS_ERR(sdev->bsg_dev)) { | |
5f7cf82c | 1448 | error = PTR_ERR(sdev->bsg_dev); |
ead09dd3 CH |
1449 | sdev_printk(KERN_INFO, sdev, |
1450 | "Failed to register bsg queue, errno=%d\n", | |
1451 | error); | |
1452 | sdev->bsg_dev = NULL; | |
1453 | } | |
1454 | } | |
80ed71ce | 1455 | |
6fe8c1db | 1456 | scsi_autopm_put_device(sdev); |
1da177e4 LT |
1457 | return error; |
1458 | } | |
1459 | ||
903f4fed | 1460 | void __scsi_remove_device(struct scsi_device *sdev) |
1da177e4 | 1461 | { |
df133c21 | 1462 | struct device *dev = &sdev->sdev_gendev; |
0db6ca8a | 1463 | int res; |
df133c21 | 1464 | |
be821fd8 VK |
1465 | /* |
1466 | * This cleanup path is not reentrant and while it is impossible | |
1467 | * to get a new reference with scsi_device_get() someone can still | |
1468 | * hold a previously acquired one. | |
1469 | */ | |
1470 | if (sdev->sdev_state == SDEV_DEL) | |
1471 | return; | |
1472 | ||
860dc736 | 1473 | if (sdev->is_visible) { |
0db6ca8a BVA |
1474 | /* |
1475 | * If scsi_internal_target_block() is running concurrently, | |
1476 | * wait until it has finished before changing the device state. | |
1477 | */ | |
1478 | mutex_lock(&sdev->state_mutex); | |
255ee932 BVA |
1479 | /* |
1480 | * If blocked, we go straight to DEL and restart the queue so | |
1481 | * any commands issued during driver shutdown (like sync | |
1482 | * cache) are errored immediately. | |
1483 | */ | |
0db6ca8a | 1484 | res = scsi_device_set_state(sdev, SDEV_CANCEL); |
255ee932 BVA |
1485 | if (res != 0) { |
1486 | res = scsi_device_set_state(sdev, SDEV_DEL); | |
1487 | if (res == 0) | |
1488 | scsi_start_queue(sdev); | |
1489 | } | |
0db6ca8a BVA |
1490 | mutex_unlock(&sdev->state_mutex); |
1491 | ||
1492 | if (res != 0) | |
860dc736 | 1493 | return; |
1da177e4 | 1494 | |
ead09dd3 CH |
1495 | if (IS_ENABLED(CONFIG_BLK_DEV_BSG) && sdev->bsg_dev) |
1496 | bsg_unregister_queue(sdev->bsg_dev); | |
860dc736 JB |
1497 | device_unregister(&sdev->sdev_dev); |
1498 | transport_remove_device(dev); | |
e619e6cb BVA |
1499 | device_del(dev); |
1500 | } else | |
1501 | put_device(&sdev->sdev_dev); | |
b485462a BVA |
1502 | |
1503 | /* | |
1504 | * Stop accepting new requests and wait until all queuecommand() and | |
1505 | * scsi_run_queue() invocations have finished before tearing down the | |
1506 | * device. | |
1507 | */ | |
0db6ca8a | 1508 | mutex_lock(&sdev->state_mutex); |
1da177e4 | 1509 | scsi_device_set_state(sdev, SDEV_DEL); |
0db6ca8a BVA |
1510 | mutex_unlock(&sdev->state_mutex); |
1511 | ||
6f8191fd | 1512 | blk_mq_destroy_queue(sdev->request_queue); |
8fe4ce58 | 1513 | kref_put(&sdev->host->tagset_refcnt, scsi_mq_free_tags); |
b485462a BVA |
1514 | cancel_work_sync(&sdev->requeue_work); |
1515 | ||
1da177e4 LT |
1516 | if (sdev->host->hostt->slave_destroy) |
1517 | sdev->host->hostt->slave_destroy(sdev); | |
df133c21 | 1518 | transport_destroy_device(dev); |
86cbfb56 | 1519 | |
e63ed0d7 JB |
1520 | /* |
1521 | * Paired with the kref_get() in scsi_sysfs_initialize(). We have | |
eee8910f | 1522 | * removed sysfs visibility from the device, so make the target |
e63ed0d7 JB |
1523 | * invisible if this was the last device underneath it. |
1524 | */ | |
1525 | scsi_target_reap(scsi_target(sdev)); | |
1526 | ||
df133c21 | 1527 | put_device(dev); |
903f4fed AS |
1528 | } |
1529 | ||
1530 | /** | |
1531 | * scsi_remove_device - unregister a device from the scsi bus | |
1532 | * @sdev: scsi_device to unregister | |
1533 | **/ | |
1534 | void scsi_remove_device(struct scsi_device *sdev) | |
1535 | { | |
54195002 AS |
1536 | struct Scsi_Host *shost = sdev->host; |
1537 | ||
0b950672 | 1538 | mutex_lock(&shost->scan_mutex); |
903f4fed | 1539 | __scsi_remove_device(sdev); |
0b950672 | 1540 | mutex_unlock(&shost->scan_mutex); |
1da177e4 LT |
1541 | } |
1542 | EXPORT_SYMBOL(scsi_remove_device); | |
1543 | ||
44818efb | 1544 | static void __scsi_remove_target(struct scsi_target *starget) |
1da177e4 LT |
1545 | { |
1546 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
1547 | unsigned long flags; | |
a64358db | 1548 | struct scsi_device *sdev; |
1da177e4 LT |
1549 | |
1550 | spin_lock_irqsave(shost->host_lock, flags); | |
a64358db AS |
1551 | restart: |
1552 | list_for_each_entry(sdev, &shost->__devices, siblings) { | |
fbce4d97 HR |
1553 | /* |
1554 | * We cannot call scsi_device_get() here, as | |
1555 | * we might've been called from rmmod() causing | |
1556 | * scsi_device_get() to fail the module_is_live() | |
1557 | * check. | |
1558 | */ | |
1da177e4 | 1559 | if (sdev->channel != starget->channel || |
81b6c999 HR |
1560 | sdev->id != starget->id) |
1561 | continue; | |
1562 | if (sdev->sdev_state == SDEV_DEL || | |
1563 | sdev->sdev_state == SDEV_CANCEL || | |
fbce4d97 | 1564 | !get_device(&sdev->sdev_gendev)) |
1da177e4 LT |
1565 | continue; |
1566 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1567 | scsi_remove_device(sdev); | |
fbce4d97 | 1568 | put_device(&sdev->sdev_gendev); |
1da177e4 | 1569 | spin_lock_irqsave(shost->host_lock, flags); |
a64358db | 1570 | goto restart; |
1da177e4 LT |
1571 | } |
1572 | spin_unlock_irqrestore(shost->host_lock, flags); | |
20b1e674 | 1573 | } |
1574 | ||
1da177e4 LT |
1575 | /** |
1576 | * scsi_remove_target - try to remove a target and all its devices | |
1577 | * @dev: generic starget or parent of generic stargets to be removed | |
1578 | * | |
1579 | * Note: This is slightly racy. It is possible that if the user | |
1580 | * requests the addition of another device then the target won't be | |
1581 | * removed. | |
1582 | */ | |
1583 | void scsi_remove_target(struct device *dev) | |
1584 | { | |
3b661a92 | 1585 | struct Scsi_Host *shost = dev_to_shost(dev->parent); |
305c2e71 | 1586 | struct scsi_target *starget; |
3b661a92 DW |
1587 | unsigned long flags; |
1588 | ||
40998193 | 1589 | restart: |
3b661a92 DW |
1590 | spin_lock_irqsave(shost->host_lock, flags); |
1591 | list_for_each_entry(starget, &shost->__targets, siblings) { | |
90a88d6e | 1592 | if (starget->state == STARGET_DEL || |
f9279c96 EM |
1593 | starget->state == STARGET_REMOVE || |
1594 | starget->state == STARGET_CREATED_REMOVE) | |
3b661a92 DW |
1595 | continue; |
1596 | if (starget->dev.parent == dev || &starget->dev == dev) { | |
e63ed0d7 | 1597 | kref_get(&starget->reap_ref); |
f9279c96 EM |
1598 | if (starget->state == STARGET_CREATED) |
1599 | starget->state = STARGET_CREATED_REMOVE; | |
1600 | else | |
1601 | starget->state = STARGET_REMOVE; | |
bc3f02a7 | 1602 | spin_unlock_irqrestore(shost->host_lock, flags); |
bc3f02a7 | 1603 | __scsi_remove_target(starget); |
40998193 CH |
1604 | scsi_target_reap(starget); |
1605 | goto restart; | |
3b661a92 | 1606 | } |
1da177e4 | 1607 | } |
3b661a92 | 1608 | spin_unlock_irqrestore(shost->host_lock, flags); |
1da177e4 LT |
1609 | } |
1610 | EXPORT_SYMBOL(scsi_remove_target); | |
1611 | ||
65a09ba2 | 1612 | int __scsi_register_driver(struct device_driver *drv, struct module *owner) |
1da177e4 LT |
1613 | { |
1614 | drv->bus = &scsi_bus_type; | |
65a09ba2 | 1615 | drv->owner = owner; |
1da177e4 LT |
1616 | |
1617 | return driver_register(drv); | |
1618 | } | |
65a09ba2 | 1619 | EXPORT_SYMBOL(__scsi_register_driver); |
1da177e4 LT |
1620 | |
1621 | int scsi_register_interface(struct class_interface *intf) | |
1622 | { | |
1623 | intf->class = &sdev_class; | |
1624 | ||
1625 | return class_interface_register(intf); | |
1626 | } | |
1627 | EXPORT_SYMBOL(scsi_register_interface); | |
1628 | ||
1da177e4 LT |
1629 | /** |
1630 | * scsi_sysfs_add_host - add scsi host to subsystem | |
1631 | * @shost: scsi host struct to add to subsystem | |
1da177e4 LT |
1632 | **/ |
1633 | int scsi_sysfs_add_host(struct Scsi_Host *shost) | |
1634 | { | |
1da177e4 | 1635 | transport_register_device(&shost->shost_gendev); |
d52b3815 | 1636 | transport_configure_device(&shost->shost_gendev); |
1da177e4 LT |
1637 | return 0; |
1638 | } | |
1639 | ||
517bcc2b | 1640 | static const struct device_type scsi_dev_type = { |
bfd12944 KS |
1641 | .name = "scsi_device", |
1642 | .release = scsi_device_dev_release, | |
1643 | .groups = scsi_sdev_attr_groups, | |
1644 | }; | |
1645 | ||
1da177e4 LT |
1646 | void scsi_sysfs_device_initialize(struct scsi_device *sdev) |
1647 | { | |
1648 | unsigned long flags; | |
1649 | struct Scsi_Host *shost = sdev->host; | |
31435de9 | 1650 | const struct scsi_host_template *hostt = shost->hostt; |
1da177e4 LT |
1651 | struct scsi_target *starget = sdev->sdev_target; |
1652 | ||
1653 | device_initialize(&sdev->sdev_gendev); | |
1654 | sdev->sdev_gendev.bus = &scsi_bus_type; | |
bfd12944 | 1655 | sdev->sdev_gendev.type = &scsi_dev_type; |
a19a93e4 | 1656 | scsi_enable_async_suspend(&sdev->sdev_gendev); |
9cb78c16 | 1657 | dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%llu", |
71610f55 | 1658 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); |
3a71f0f7 | 1659 | sdev->sdev_gendev.groups = hostt->sdev_groups; |
71610f55 | 1660 | |
ee959b00 | 1661 | device_initialize(&sdev->sdev_dev); |
37e6ba00 | 1662 | sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev); |
ee959b00 | 1663 | sdev->sdev_dev.class = &sdev_class; |
9cb78c16 | 1664 | dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%llu", |
71610f55 | 1665 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); |
50c4e964 AS |
1666 | /* |
1667 | * Get a default scsi_level from the target (derived from sibling | |
1668 | * devices). This is the best we can do for guessing how to set | |
1669 | * sdev->lun_in_cdb for the initial INQUIRY command. For LUN 0 the | |
1670 | * setting doesn't matter, because all the bits are zero anyway. | |
1671 | * But it does matter for higher LUNs. | |
1672 | */ | |
7c9d6f16 | 1673 | sdev->scsi_level = starget->scsi_level; |
50c4e964 AS |
1674 | if (sdev->scsi_level <= SCSI_2 && |
1675 | sdev->scsi_level != SCSI_UNKNOWN && | |
1676 | !shost->no_scsi2_lun_in_cdb) | |
1677 | sdev->lun_in_cdb = 1; | |
1678 | ||
1da177e4 LT |
1679 | transport_setup_device(&sdev->sdev_gendev); |
1680 | spin_lock_irqsave(shost->host_lock, flags); | |
1681 | list_add_tail(&sdev->same_target_siblings, &starget->devices); | |
1682 | list_add_tail(&sdev->siblings, &shost->__devices); | |
1683 | spin_unlock_irqrestore(shost->host_lock, flags); | |
e63ed0d7 JB |
1684 | /* |
1685 | * device can now only be removed via __scsi_remove_device() so hold | |
1686 | * the target. Target will be held in CREATED state until something | |
1687 | * beneath it becomes visible (in which case it moves to RUNNING) | |
1688 | */ | |
1689 | kref_get(&starget->reap_ref); | |
1da177e4 LT |
1690 | } |
1691 | ||
1692 | int scsi_is_sdev_device(const struct device *dev) | |
1693 | { | |
13ba9bcb | 1694 | return dev->type == &scsi_dev_type; |
1da177e4 LT |
1695 | } |
1696 | EXPORT_SYMBOL(scsi_is_sdev_device); | |
1697 | ||
1698 | /* A blank transport template that is used in drivers that don't | |
1699 | * yet implement Transport Attributes */ | |
1700 | struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |