Commit | Line | Data |
---|---|---|
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 | ||
b0ed4336 HR |
30 | static struct device_type scsi_dev_type; |
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); | |
299 | struct scsi_host_template *sht = shost->hostt; | |
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 | ||
65f27f38 | 444 | static void scsi_device_dev_release_usercontext(struct work_struct *work) |
1da177e4 | 445 | { |
fe442604 BVA |
446 | struct scsi_device *sdev = container_of(work, struct scsi_device, |
447 | ew.work); | |
448 | struct scsi_target *starget = sdev->sdev_target; | |
1da177e4 | 449 | struct device *parent; |
a341cd0f | 450 | struct list_head *this, *tmp; |
ccf1e004 | 451 | struct scsi_vpd *vpd_pg80 = NULL, *vpd_pg83 = NULL; |
d188b067 | 452 | struct scsi_vpd *vpd_pg0 = NULL, *vpd_pg89 = NULL; |
e60ac0b9 | 453 | struct scsi_vpd *vpd_pgb0 = NULL, *vpd_pgb1 = NULL, *vpd_pgb2 = NULL; |
1da177e4 | 454 | unsigned long flags; |
f2b85040 | 455 | |
23695e41 JN |
456 | scsi_dh_release_device(sdev); |
457 | ||
65f27f38 | 458 | parent = sdev->sdev_gendev.parent; |
1da177e4 LT |
459 | |
460 | spin_lock_irqsave(sdev->host->host_lock, flags); | |
1da177e4 LT |
461 | list_del(&sdev->siblings); |
462 | list_del(&sdev->same_target_siblings); | |
463 | list_del(&sdev->starved_entry); | |
464 | spin_unlock_irqrestore(sdev->host->host_lock, flags); | |
465 | ||
a341cd0f JG |
466 | cancel_work_sync(&sdev->event_work); |
467 | ||
468 | list_for_each_safe(this, tmp, &sdev->event_list) { | |
469 | struct scsi_event *evt; | |
470 | ||
471 | evt = list_entry(this, struct scsi_event, node); | |
472 | list_del(&evt->node); | |
473 | kfree(evt); | |
474 | } | |
475 | ||
e73e079b | 476 | blk_put_queue(sdev->request_queue); |
86cbfb56 JB |
477 | /* NULL queue means the device can't be used */ |
478 | sdev->request_queue = NULL; | |
1da177e4 | 479 | |
020b0f0a ML |
480 | sbitmap_free(&sdev->budget_map); |
481 | ||
ccf1e004 | 482 | mutex_lock(&sdev->inquiry_mutex); |
ef2cc88e LT |
483 | vpd_pg0 = rcu_replace_pointer(sdev->vpd_pg0, vpd_pg0, |
484 | lockdep_is_held(&sdev->inquiry_mutex)); | |
c0eaf15c PM |
485 | vpd_pg80 = rcu_replace_pointer(sdev->vpd_pg80, vpd_pg80, |
486 | lockdep_is_held(&sdev->inquiry_mutex)); | |
487 | vpd_pg83 = rcu_replace_pointer(sdev->vpd_pg83, vpd_pg83, | |
488 | lockdep_is_held(&sdev->inquiry_mutex)); | |
ef2cc88e LT |
489 | vpd_pg89 = rcu_replace_pointer(sdev->vpd_pg89, vpd_pg89, |
490 | lockdep_is_held(&sdev->inquiry_mutex)); | |
e60ac0b9 MP |
491 | vpd_pgb0 = rcu_replace_pointer(sdev->vpd_pgb0, vpd_pgb0, |
492 | lockdep_is_held(&sdev->inquiry_mutex)); | |
493 | vpd_pgb1 = rcu_replace_pointer(sdev->vpd_pgb1, vpd_pgb1, | |
494 | lockdep_is_held(&sdev->inquiry_mutex)); | |
495 | vpd_pgb2 = rcu_replace_pointer(sdev->vpd_pgb2, vpd_pgb2, | |
496 | lockdep_is_held(&sdev->inquiry_mutex)); | |
ccf1e004 BVA |
497 | mutex_unlock(&sdev->inquiry_mutex); |
498 | ||
d188b067 RA |
499 | if (vpd_pg0) |
500 | kfree_rcu(vpd_pg0, rcu); | |
ccf1e004 BVA |
501 | if (vpd_pg83) |
502 | kfree_rcu(vpd_pg83, rcu); | |
503 | if (vpd_pg80) | |
504 | kfree_rcu(vpd_pg80, rcu); | |
d188b067 RA |
505 | if (vpd_pg89) |
506 | kfree_rcu(vpd_pg89, rcu); | |
e60ac0b9 MP |
507 | if (vpd_pgb0) |
508 | kfree_rcu(vpd_pgb0, rcu); | |
509 | if (vpd_pgb1) | |
510 | kfree_rcu(vpd_pgb1, rcu); | |
511 | if (vpd_pgb2) | |
512 | kfree_rcu(vpd_pgb2, rcu); | |
1da177e4 LT |
513 | kfree(sdev->inquiry); |
514 | kfree(sdev); | |
515 | ||
fe442604 BVA |
516 | if (starget && atomic_dec_return(&starget->sdev_count) == 0) |
517 | wake_up(&starget->sdev_wq); | |
518 | ||
1da177e4 LT |
519 | if (parent) |
520 | put_device(parent); | |
521 | } | |
522 | ||
65110b21 JB |
523 | static void scsi_device_dev_release(struct device *dev) |
524 | { | |
ffedb452 | 525 | struct scsi_device *sdp = to_scsi_device(dev); |
65f27f38 | 526 | execute_in_process_context(scsi_device_dev_release_usercontext, |
ffedb452 | 527 | &sdp->ew); |
65110b21 JB |
528 | } |
529 | ||
52c1da39 | 530 | static struct class sdev_class = { |
1da177e4 | 531 | .name = "scsi_device", |
ee959b00 | 532 | .dev_release = scsi_device_cls_release, |
1da177e4 LT |
533 | }; |
534 | ||
535 | /* all probing is done in the individual ->probe routines */ | |
536 | static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) | |
537 | { | |
b0ed4336 HR |
538 | struct scsi_device *sdp; |
539 | ||
540 | if (dev->type != &scsi_dev_type) | |
541 | return 0; | |
542 | ||
543 | sdp = to_scsi_device(dev); | |
1da177e4 LT |
544 | if (sdp->no_uld_attach) |
545 | return 0; | |
546 | return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; | |
547 | } | |
548 | ||
7eff2e7a | 549 | static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
d7b8bcb0 | 550 | { |
1f42ea7b JB |
551 | struct scsi_device *sdev; |
552 | ||
553 | if (dev->type != &scsi_dev_type) | |
554 | return 0; | |
555 | ||
556 | sdev = to_scsi_device(dev); | |
d7b8bcb0 | 557 | |
7eff2e7a | 558 | add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type); |
d7b8bcb0 MT |
559 | return 0; |
560 | } | |
561 | ||
1da177e4 LT |
562 | struct bus_type scsi_bus_type = { |
563 | .name = "scsi", | |
564 | .match = scsi_bus_match, | |
d7b8bcb0 | 565 | .uevent = scsi_bus_uevent, |
aa338601 | 566 | #ifdef CONFIG_PM |
db5bd1e0 | 567 | .pm = &scsi_bus_pm_ops, |
e6da54d8 | 568 | #endif |
1da177e4 LT |
569 | }; |
570 | ||
571 | int scsi_sysfs_register(void) | |
572 | { | |
573 | int error; | |
574 | ||
575 | error = bus_register(&scsi_bus_type); | |
576 | if (!error) { | |
577 | error = class_register(&sdev_class); | |
578 | if (error) | |
579 | bus_unregister(&scsi_bus_type); | |
580 | } | |
581 | ||
582 | return error; | |
583 | } | |
584 | ||
585 | void scsi_sysfs_unregister(void) | |
586 | { | |
587 | class_unregister(&sdev_class); | |
588 | bus_unregister(&scsi_bus_type); | |
589 | } | |
590 | ||
591 | /* | |
592 | * sdev_show_function: macro to create an attr function that can be used to | |
593 | * show a non-bit field. | |
594 | */ | |
595 | #define sdev_show_function(field, format_string) \ | |
596 | static ssize_t \ | |
ee959b00 TJ |
597 | sdev_show_##field (struct device *dev, struct device_attribute *attr, \ |
598 | char *buf) \ | |
1da177e4 LT |
599 | { \ |
600 | struct scsi_device *sdev; \ | |
601 | sdev = to_scsi_device(dev); \ | |
602 | return snprintf (buf, 20, format_string, sdev->field); \ | |
603 | } \ | |
604 | ||
605 | /* | |
606 | * sdev_rd_attr: macro to create a function and attribute variable for a | |
607 | * read only field. | |
608 | */ | |
609 | #define sdev_rd_attr(field, format_string) \ | |
610 | sdev_show_function(field, format_string) \ | |
611 | static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); | |
612 | ||
613 | ||
614 | /* | |
160e7f67 | 615 | * sdev_rw_attr: create a function and attribute variable for a |
1da177e4 LT |
616 | * read/write field. |
617 | */ | |
618 | #define sdev_rw_attr(field, format_string) \ | |
619 | sdev_show_function(field, format_string) \ | |
620 | \ | |
621 | static ssize_t \ | |
ee959b00 TJ |
622 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
623 | const char *buf, size_t count) \ | |
1da177e4 LT |
624 | { \ |
625 | struct scsi_device *sdev; \ | |
626 | sdev = to_scsi_device(dev); \ | |
160e7f67 | 627 | sscanf (buf, format_string, &sdev->field); \ |
1da177e4 LT |
628 | return count; \ |
629 | } \ | |
630 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
631 | ||
632 | /* Currently we don't export bit fields, but we might in future, | |
633 | * so leave this code in */ | |
634 | #if 0 | |
635 | /* | |
636 | * sdev_rd_attr: create a function and attribute variable for a | |
637 | * read/write bit field. | |
638 | */ | |
639 | #define sdev_rw_attr_bit(field) \ | |
640 | sdev_show_function(field, "%d\n") \ | |
641 | \ | |
642 | static ssize_t \ | |
ee959b00 TJ |
643 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
644 | const char *buf, size_t count) \ | |
1da177e4 LT |
645 | { \ |
646 | int ret; \ | |
647 | struct scsi_device *sdev; \ | |
648 | ret = scsi_sdev_check_buf_bit(buf); \ | |
649 | if (ret >= 0) { \ | |
650 | sdev = to_scsi_device(dev); \ | |
651 | sdev->field = ret; \ | |
652 | ret = count; \ | |
653 | } \ | |
654 | return ret; \ | |
655 | } \ | |
656 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
657 | ||
658 | /* | |
659 | * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", | |
660 | * else return -EINVAL. | |
661 | */ | |
662 | static int scsi_sdev_check_buf_bit(const char *buf) | |
663 | { | |
664 | if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { | |
665 | if (buf[0] == '1') | |
666 | return 1; | |
667 | else if (buf[0] == '0') | |
668 | return 0; | |
669 | else | |
670 | return -EINVAL; | |
671 | } else | |
672 | return -EINVAL; | |
673 | } | |
674 | #endif | |
675 | /* | |
676 | * Create the actual show/store functions and data structures. | |
677 | */ | |
1da177e4 LT |
678 | sdev_rd_attr (type, "%d\n"); |
679 | sdev_rd_attr (scsi_level, "%d\n"); | |
680 | sdev_rd_attr (vendor, "%.8s\n"); | |
681 | sdev_rd_attr (model, "%.16s\n"); | |
682 | sdev_rd_attr (rev, "%.4s\n"); | |
683 | ||
71e75c97 CH |
684 | static ssize_t |
685 | sdev_show_device_busy(struct device *dev, struct device_attribute *attr, | |
686 | char *buf) | |
687 | { | |
688 | struct scsi_device *sdev = to_scsi_device(dev); | |
8278807a | 689 | return snprintf(buf, 20, "%d\n", scsi_device_busy(sdev)); |
71e75c97 CH |
690 | } |
691 | static DEVICE_ATTR(device_busy, S_IRUGO, sdev_show_device_busy, NULL); | |
692 | ||
cd9070c9 CH |
693 | static ssize_t |
694 | sdev_show_device_blocked(struct device *dev, struct device_attribute *attr, | |
695 | char *buf) | |
696 | { | |
697 | struct scsi_device *sdev = to_scsi_device(dev); | |
698 | return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_blocked)); | |
699 | } | |
700 | static DEVICE_ATTR(device_blocked, S_IRUGO, sdev_show_device_blocked, NULL); | |
701 | ||
242f9dcb JA |
702 | /* |
703 | * TODO: can we make these symlinks to the block layer ones? | |
704 | */ | |
1da177e4 | 705 | static ssize_t |
10523b3b | 706 | sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
707 | { |
708 | struct scsi_device *sdev; | |
709 | sdev = to_scsi_device(dev); | |
242f9dcb | 710 | return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ); |
1da177e4 LT |
711 | } |
712 | ||
713 | static ssize_t | |
ee959b00 TJ |
714 | sdev_store_timeout (struct device *dev, struct device_attribute *attr, |
715 | const char *buf, size_t count) | |
1da177e4 LT |
716 | { |
717 | struct scsi_device *sdev; | |
718 | int timeout; | |
719 | sdev = to_scsi_device(dev); | |
720 | sscanf (buf, "%d\n", &timeout); | |
242f9dcb | 721 | blk_queue_rq_timeout(sdev->request_queue, timeout * HZ); |
1da177e4 LT |
722 | return count; |
723 | } | |
724 | static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); | |
725 | ||
0816c925 MP |
726 | static ssize_t |
727 | sdev_show_eh_timeout(struct device *dev, struct device_attribute *attr, char *buf) | |
728 | { | |
729 | struct scsi_device *sdev; | |
730 | sdev = to_scsi_device(dev); | |
731 | return snprintf(buf, 20, "%u\n", sdev->eh_timeout / HZ); | |
732 | } | |
733 | ||
734 | static ssize_t | |
735 | sdev_store_eh_timeout(struct device *dev, struct device_attribute *attr, | |
736 | const char *buf, size_t count) | |
737 | { | |
738 | struct scsi_device *sdev; | |
739 | unsigned int eh_timeout; | |
740 | int err; | |
741 | ||
742 | if (!capable(CAP_SYS_ADMIN)) | |
743 | return -EACCES; | |
744 | ||
745 | sdev = to_scsi_device(dev); | |
746 | err = kstrtouint(buf, 10, &eh_timeout); | |
747 | if (err) | |
748 | return err; | |
749 | sdev->eh_timeout = eh_timeout * HZ; | |
750 | ||
751 | return count; | |
752 | } | |
753 | static DEVICE_ATTR(eh_timeout, S_IRUGO | S_IWUSR, sdev_show_eh_timeout, sdev_store_eh_timeout); | |
754 | ||
1da177e4 | 755 | static ssize_t |
ee959b00 TJ |
756 | store_rescan_field (struct device *dev, struct device_attribute *attr, |
757 | const char *buf, size_t count) | |
1da177e4 LT |
758 | { |
759 | scsi_rescan_device(dev); | |
760 | return count; | |
761 | } | |
762 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); | |
763 | ||
ee959b00 TJ |
764 | static ssize_t |
765 | sdev_store_delete(struct device *dev, struct device_attribute *attr, | |
766 | const char *buf, size_t count) | |
1da177e4 | 767 | { |
0ee223b2 | 768 | struct kernfs_node *kn; |
77c30128 YY |
769 | struct scsi_device *sdev = to_scsi_device(dev); |
770 | ||
771 | /* | |
772 | * We need to try to get module, avoiding the module been removed | |
773 | * during delete. | |
774 | */ | |
775 | if (scsi_device_get(sdev)) | |
776 | return -ENODEV; | |
0ee223b2 BVA |
777 | |
778 | kn = sysfs_break_active_protection(&dev->kobj, &attr->attr); | |
779 | WARN_ON_ONCE(!kn); | |
780 | /* | |
781 | * Concurrent writes into the "delete" sysfs attribute may trigger | |
782 | * concurrent calls to device_remove_file() and scsi_remove_device(). | |
783 | * device_remove_file() handles concurrent removal calls by | |
784 | * serializing these and by ignoring the second and later removal | |
785 | * attempts. Concurrent calls of scsi_remove_device() are | |
786 | * serialized. The second and later calls of scsi_remove_device() are | |
787 | * ignored because the first call of that function changes the device | |
788 | * state into SDEV_DEL. | |
789 | */ | |
790 | device_remove_file(dev, attr); | |
77c30128 | 791 | scsi_remove_device(sdev); |
0ee223b2 BVA |
792 | if (kn) |
793 | sysfs_unbreak_active_protection(kn); | |
77c30128 | 794 | scsi_device_put(sdev); |
1da177e4 LT |
795 | return count; |
796 | }; | |
797 | static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); | |
798 | ||
799 | static ssize_t | |
ee959b00 TJ |
800 | store_state_field(struct device *dev, struct device_attribute *attr, |
801 | const char *buf, size_t count) | |
1da177e4 | 802 | { |
0db6ca8a | 803 | int i, ret; |
1da177e4 LT |
804 | struct scsi_device *sdev = to_scsi_device(dev); |
805 | enum scsi_device_state state = 0; | |
4edd8cd4 | 806 | bool rescan_dev = false; |
1da177e4 | 807 | |
6391a113 | 808 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
809 | const int len = strlen(sdev_states[i].name); |
810 | if (strncmp(sdev_states[i].name, buf, len) == 0 && | |
811 | buf[len] == '\n') { | |
812 | state = sdev_states[i].value; | |
813 | break; | |
814 | } | |
815 | } | |
ac88c1f6 BVA |
816 | switch (state) { |
817 | case SDEV_RUNNING: | |
818 | case SDEV_OFFLINE: | |
819 | break; | |
820 | default: | |
1da177e4 | 821 | return -EINVAL; |
ac88c1f6 | 822 | } |
1da177e4 | 823 | |
0db6ca8a | 824 | mutex_lock(&sdev->state_mutex); |
4edd8cd4 | 825 | if (sdev->sdev_state == SDEV_RUNNING && state == SDEV_RUNNING) { |
eb97545d | 826 | ret = 0; |
4edd8cd4 MC |
827 | } else { |
828 | ret = scsi_device_set_state(sdev, state); | |
829 | if (ret == 0 && state == SDEV_RUNNING) | |
830 | rescan_dev = true; | |
831 | } | |
832 | mutex_unlock(&sdev->state_mutex); | |
833 | ||
834 | if (rescan_dev) { | |
835 | /* | |
836 | * If the device state changes to SDEV_RUNNING, we need to | |
837 | * run the queue to avoid I/O hang, and rescan the device | |
838 | * to revalidate it. Running the queue first is necessary | |
839 | * because another thread may be waiting inside | |
840 | * blk_mq_freeze_queue_wait() and because that call may be | |
841 | * waiting for pending I/O to finish. | |
842 | */ | |
70fc085c | 843 | blk_mq_run_hw_queues(sdev->request_queue, true); |
02c6dcd5 | 844 | scsi_rescan_device(dev); |
f0f82e24 | 845 | } |
0db6ca8a BVA |
846 | |
847 | return ret == 0 ? count : -EINVAL; | |
1da177e4 LT |
848 | } |
849 | ||
850 | static ssize_t | |
10523b3b | 851 | show_state_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
852 | { |
853 | struct scsi_device *sdev = to_scsi_device(dev); | |
854 | const char *name = scsi_device_state_name(sdev->sdev_state); | |
855 | ||
856 | if (!name) | |
857 | return -EINVAL; | |
858 | ||
859 | return snprintf(buf, 20, "%s\n", name); | |
860 | } | |
861 | ||
862 | static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); | |
863 | ||
864 | static ssize_t | |
ee959b00 TJ |
865 | show_queue_type_field(struct device *dev, struct device_attribute *attr, |
866 | char *buf) | |
1da177e4 LT |
867 | { |
868 | struct scsi_device *sdev = to_scsi_device(dev); | |
869 | const char *name = "none"; | |
870 | ||
609aa22f | 871 | if (sdev->simple_tags) |
1da177e4 LT |
872 | name = "simple"; |
873 | ||
874 | return snprintf(buf, 20, "%s\n", name); | |
875 | } | |
876 | ||
276b20d0 HR |
877 | static ssize_t |
878 | store_queue_type_field(struct device *dev, struct device_attribute *attr, | |
879 | const char *buf, size_t count) | |
880 | { | |
881 | struct scsi_device *sdev = to_scsi_device(dev); | |
276b20d0 | 882 | |
efc3c1df | 883 | if (!sdev->tagged_supported) |
276b20d0 | 884 | return -EINVAL; |
efc3c1df CH |
885 | |
886 | sdev_printk(KERN_INFO, sdev, | |
887 | "ignoring write to deprecated queue_type attribute"); | |
276b20d0 HR |
888 | return count; |
889 | } | |
890 | ||
891 | static DEVICE_ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, | |
892 | store_queue_type_field); | |
1da177e4 | 893 | |
b3ae8780 HR |
894 | #define sdev_vpd_pg_attr(_page) \ |
895 | static ssize_t \ | |
896 | show_vpd_##_page(struct file *filp, struct kobject *kobj, \ | |
897 | struct bin_attribute *bin_attr, \ | |
898 | char *buf, loff_t off, size_t count) \ | |
899 | { \ | |
9e7bd945 | 900 | struct device *dev = kobj_to_dev(kobj); \ |
b3ae8780 | 901 | struct scsi_device *sdev = to_scsi_device(dev); \ |
ccf1e004 BVA |
902 | struct scsi_vpd *vpd_page; \ |
903 | int ret = -EINVAL; \ | |
904 | \ | |
09e2b0b1 | 905 | rcu_read_lock(); \ |
ccf1e004 BVA |
906 | vpd_page = rcu_dereference(sdev->vpd_##_page); \ |
907 | if (vpd_page) \ | |
908 | ret = memory_read_from_buffer(buf, count, &off, \ | |
909 | vpd_page->data, vpd_page->len); \ | |
09e2b0b1 | 910 | rcu_read_unlock(); \ |
ccf1e004 | 911 | return ret; \ |
b3ae8780 HR |
912 | } \ |
913 | static struct bin_attribute dev_attr_vpd_##_page = { \ | |
914 | .attr = {.name = __stringify(vpd_##_page), .mode = S_IRUGO }, \ | |
915 | .size = 0, \ | |
916 | .read = show_vpd_##_page, \ | |
917 | }; | |
918 | ||
919 | sdev_vpd_pg_attr(pg83); | |
920 | sdev_vpd_pg_attr(pg80); | |
d188b067 | 921 | sdev_vpd_pg_attr(pg89); |
e60ac0b9 MP |
922 | sdev_vpd_pg_attr(pgb0); |
923 | sdev_vpd_pg_attr(pgb1); | |
924 | sdev_vpd_pg_attr(pgb2); | |
d188b067 | 925 | sdev_vpd_pg_attr(pg0); |
1da177e4 | 926 | |
92e6246c JT |
927 | static ssize_t show_inquiry(struct file *filep, struct kobject *kobj, |
928 | struct bin_attribute *bin_attr, | |
929 | char *buf, loff_t off, size_t count) | |
930 | { | |
9e7bd945 | 931 | struct device *dev = kobj_to_dev(kobj); |
92e6246c JT |
932 | struct scsi_device *sdev = to_scsi_device(dev); |
933 | ||
934 | if (!sdev->inquiry) | |
935 | return -EINVAL; | |
936 | ||
937 | return memory_read_from_buffer(buf, count, &off, sdev->inquiry, | |
938 | sdev->inquiry_len); | |
939 | } | |
940 | ||
941 | static struct bin_attribute dev_attr_inquiry = { | |
942 | .attr = { | |
943 | .name = "inquiry", | |
944 | .mode = S_IRUGO, | |
945 | }, | |
946 | .size = 0, | |
947 | .read = show_inquiry, | |
948 | }; | |
949 | ||
1da177e4 | 950 | static ssize_t |
b3ae8780 HR |
951 | show_iostat_counterbits(struct device *dev, struct device_attribute *attr, |
952 | char *buf) | |
1da177e4 LT |
953 | { |
954 | return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); | |
955 | } | |
956 | ||
957 | static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); | |
958 | ||
959 | #define show_sdev_iostat(field) \ | |
960 | static ssize_t \ | |
ee959b00 TJ |
961 | show_iostat_##field(struct device *dev, struct device_attribute *attr, \ |
962 | char *buf) \ | |
1da177e4 LT |
963 | { \ |
964 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
965 | unsigned long long count = atomic_read(&sdev->field); \ | |
966 | return snprintf(buf, 20, "0x%llx\n", count); \ | |
967 | } \ | |
968 | static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) | |
969 | ||
970 | show_sdev_iostat(iorequest_cnt); | |
971 | show_sdev_iostat(iodone_cnt); | |
972 | show_sdev_iostat(ioerr_cnt); | |
973 | ||
d7b8bcb0 MT |
974 | static ssize_t |
975 | sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf) | |
976 | { | |
977 | struct scsi_device *sdev; | |
978 | sdev = to_scsi_device(dev); | |
979 | return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type); | |
980 | } | |
981 | static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL); | |
1da177e4 | 982 | |
a341cd0f JG |
983 | #define DECLARE_EVT_SHOW(name, Cap_name) \ |
984 | static ssize_t \ | |
985 | sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \ | |
ee959b00 | 986 | char *buf) \ |
a341cd0f JG |
987 | { \ |
988 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
989 | int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\ | |
990 | return snprintf(buf, 20, "%d\n", val); \ | |
991 | } | |
992 | ||
993 | #define DECLARE_EVT_STORE(name, Cap_name) \ | |
994 | static ssize_t \ | |
ee959b00 | 995 | sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\ |
a341cd0f JG |
996 | const char *buf, size_t count) \ |
997 | { \ | |
998 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
999 | int val = simple_strtoul(buf, NULL, 0); \ | |
1000 | if (val == 0) \ | |
1001 | clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
1002 | else if (val == 1) \ | |
1003 | set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
1004 | else \ | |
1005 | return -EINVAL; \ | |
1006 | return count; \ | |
1007 | } | |
1008 | ||
1009 | #define DECLARE_EVT(name, Cap_name) \ | |
1010 | DECLARE_EVT_SHOW(name, Cap_name) \ | |
1011 | DECLARE_EVT_STORE(name, Cap_name) \ | |
1012 | static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \ | |
1013 | sdev_store_evt_##name); | |
1014 | #define REF_EVT(name) &dev_attr_evt_##name.attr | |
1015 | ||
1016 | DECLARE_EVT(media_change, MEDIA_CHANGE) | |
279afdfe EM |
1017 | DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED) |
1018 | DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED) | |
1019 | DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED) | |
1020 | DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED) | |
1021 | DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED) | |
a341cd0f | 1022 | |
ee959b00 | 1023 | static ssize_t |
276b20d0 HR |
1024 | sdev_store_queue_depth(struct device *dev, struct device_attribute *attr, |
1025 | const char *buf, size_t count) | |
1da177e4 LT |
1026 | { |
1027 | int depth, retval; | |
1028 | struct scsi_device *sdev = to_scsi_device(dev); | |
1029 | struct scsi_host_template *sht = sdev->host->hostt; | |
1030 | ||
1031 | if (!sht->change_queue_depth) | |
1032 | return -EINVAL; | |
1033 | ||
1034 | depth = simple_strtoul(buf, NULL, 0); | |
1035 | ||
1278dd68 | 1036 | if (depth < 1 || depth > sdev->host->can_queue) |
1da177e4 LT |
1037 | return -EINVAL; |
1038 | ||
db5ed4df | 1039 | retval = sht->change_queue_depth(sdev, depth); |
1da177e4 LT |
1040 | if (retval < 0) |
1041 | return retval; | |
1042 | ||
4a84067d VD |
1043 | sdev->max_queue_depth = sdev->queue_depth; |
1044 | ||
1da177e4 LT |
1045 | return count; |
1046 | } | |
276b20d0 | 1047 | sdev_show_function(queue_depth, "%d\n"); |
1da177e4 | 1048 | |
276b20d0 HR |
1049 | static DEVICE_ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, |
1050 | sdev_store_queue_depth); | |
1da177e4 | 1051 | |
248d4fe9 HR |
1052 | static ssize_t |
1053 | sdev_show_wwid(struct device *dev, struct device_attribute *attr, | |
1054 | char *buf) | |
1055 | { | |
1056 | struct scsi_device *sdev = to_scsi_device(dev); | |
1057 | ssize_t count; | |
1058 | ||
1059 | count = scsi_vpd_lun_id(sdev, buf, PAGE_SIZE); | |
1060 | if (count > 0) { | |
1061 | buf[count] = '\n'; | |
1062 | count++; | |
1063 | } | |
1064 | return count; | |
1065 | } | |
1066 | static DEVICE_ATTR(wwid, S_IRUGO, sdev_show_wwid, NULL); | |
1067 | ||
093b8886 | 1068 | #define BLIST_FLAG_NAME(name) \ |
14098803 | 1069 | [const_ilog2((__force __u64)BLIST_##name)] = #name |
345e2960 HR |
1070 | static const char *const sdev_bflags_name[] = { |
1071 | #include "scsi_devinfo_tbl.c" | |
1072 | }; | |
1073 | #undef BLIST_FLAG_NAME | |
1074 | ||
1075 | static ssize_t | |
1076 | sdev_show_blacklist(struct device *dev, struct device_attribute *attr, | |
1077 | char *buf) | |
1078 | { | |
1079 | struct scsi_device *sdev = to_scsi_device(dev); | |
1080 | int i; | |
1081 | ssize_t len = 0; | |
1082 | ||
1083 | for (i = 0; i < sizeof(sdev->sdev_bflags) * BITS_PER_BYTE; i++) { | |
1084 | const char *name = NULL; | |
1085 | ||
093b8886 | 1086 | if (!(sdev->sdev_bflags & (__force blist_flags_t)BIT(i))) |
345e2960 HR |
1087 | continue; |
1088 | if (i < ARRAY_SIZE(sdev_bflags_name) && sdev_bflags_name[i]) | |
1089 | name = sdev_bflags_name[i]; | |
1090 | ||
1091 | if (name) | |
81546b32 TI |
1092 | len += scnprintf(buf + len, PAGE_SIZE - len, |
1093 | "%s%s", len ? " " : "", name); | |
345e2960 | 1094 | else |
81546b32 TI |
1095 | len += scnprintf(buf + len, PAGE_SIZE - len, |
1096 | "%sINVALID_BIT(%d)", len ? " " : "", i); | |
345e2960 HR |
1097 | } |
1098 | if (len) | |
81546b32 | 1099 | len += scnprintf(buf + len, PAGE_SIZE - len, "\n"); |
345e2960 HR |
1100 | return len; |
1101 | } | |
1102 | static DEVICE_ATTR(blacklist, S_IRUGO, sdev_show_blacklist, NULL); | |
1103 | ||
41f95dd2 HR |
1104 | #ifdef CONFIG_SCSI_DH |
1105 | static ssize_t | |
1106 | sdev_show_dh_state(struct device *dev, struct device_attribute *attr, | |
1107 | char *buf) | |
1108 | { | |
1109 | struct scsi_device *sdev = to_scsi_device(dev); | |
1110 | ||
1111 | if (!sdev->handler) | |
1112 | return snprintf(buf, 20, "detached\n"); | |
1113 | ||
1114 | return snprintf(buf, 20, "%s\n", sdev->handler->name); | |
1115 | } | |
1116 | ||
1117 | static ssize_t | |
1118 | sdev_store_dh_state(struct device *dev, struct device_attribute *attr, | |
1119 | const char *buf, size_t count) | |
1120 | { | |
1121 | struct scsi_device *sdev = to_scsi_device(dev); | |
1122 | int err = -EINVAL; | |
1123 | ||
1124 | if (sdev->sdev_state == SDEV_CANCEL || | |
1125 | sdev->sdev_state == SDEV_DEL) | |
1126 | return -ENODEV; | |
1127 | ||
1128 | if (!sdev->handler) { | |
1129 | /* | |
1130 | * Attach to a device handler | |
1131 | */ | |
1132 | err = scsi_dh_attach(sdev->request_queue, buf); | |
1133 | } else if (!strncmp(buf, "activate", 8)) { | |
1134 | /* | |
1135 | * Activate a device handler | |
1136 | */ | |
1137 | if (sdev->handler->activate) | |
1138 | err = sdev->handler->activate(sdev, NULL, NULL); | |
1139 | else | |
1140 | err = 0; | |
1141 | } else if (!strncmp(buf, "detach", 6)) { | |
1142 | /* | |
1143 | * Detach from a device handler | |
1144 | */ | |
1145 | sdev_printk(KERN_WARNING, sdev, | |
1146 | "can't detach handler %s.\n", | |
1147 | sdev->handler->name); | |
1148 | err = -EINVAL; | |
1149 | } | |
1150 | ||
1151 | return err < 0 ? err : count; | |
1152 | } | |
1153 | ||
1154 | static DEVICE_ATTR(dh_state, S_IRUGO | S_IWUSR, sdev_show_dh_state, | |
1155 | sdev_store_dh_state); | |
77c9df96 HR |
1156 | |
1157 | static ssize_t | |
1158 | sdev_show_access_state(struct device *dev, | |
1159 | struct device_attribute *attr, | |
1160 | char *buf) | |
1161 | { | |
1162 | struct scsi_device *sdev = to_scsi_device(dev); | |
1163 | unsigned char access_state; | |
1164 | const char *access_state_name; | |
1165 | ||
1166 | if (!sdev->handler) | |
1167 | return -EINVAL; | |
1168 | ||
1169 | access_state = (sdev->access_state & SCSI_ACCESS_STATE_MASK); | |
1170 | access_state_name = scsi_access_state_name(access_state); | |
1171 | ||
1172 | return sprintf(buf, "%s\n", | |
1173 | access_state_name ? access_state_name : "unknown"); | |
1174 | } | |
1175 | static DEVICE_ATTR(access_state, S_IRUGO, sdev_show_access_state, NULL); | |
1176 | ||
1177 | static ssize_t | |
1178 | sdev_show_preferred_path(struct device *dev, | |
1179 | struct device_attribute *attr, | |
1180 | char *buf) | |
1181 | { | |
1182 | struct scsi_device *sdev = to_scsi_device(dev); | |
1183 | ||
1184 | if (!sdev->handler) | |
1185 | return -EINVAL; | |
1186 | ||
1187 | if (sdev->access_state & SCSI_ACCESS_STATE_PREFERRED) | |
1188 | return sprintf(buf, "1\n"); | |
1189 | else | |
1190 | return sprintf(buf, "0\n"); | |
1191 | } | |
1192 | static DEVICE_ATTR(preferred_path, S_IRUGO, sdev_show_preferred_path, NULL); | |
41f95dd2 HR |
1193 | #endif |
1194 | ||
4a84067d VD |
1195 | static ssize_t |
1196 | sdev_show_queue_ramp_up_period(struct device *dev, | |
1197 | struct device_attribute *attr, | |
1198 | char *buf) | |
1199 | { | |
1200 | struct scsi_device *sdev; | |
1201 | sdev = to_scsi_device(dev); | |
1202 | return snprintf(buf, 20, "%u\n", | |
1203 | jiffies_to_msecs(sdev->queue_ramp_up_period)); | |
1204 | } | |
1205 | ||
1206 | static ssize_t | |
1207 | sdev_store_queue_ramp_up_period(struct device *dev, | |
1208 | struct device_attribute *attr, | |
1209 | const char *buf, size_t count) | |
1210 | { | |
1211 | struct scsi_device *sdev = to_scsi_device(dev); | |
f7c65af5 | 1212 | unsigned int period; |
4a84067d | 1213 | |
f7c65af5 | 1214 | if (kstrtouint(buf, 10, &period)) |
4a84067d VD |
1215 | return -EINVAL; |
1216 | ||
1217 | sdev->queue_ramp_up_period = msecs_to_jiffies(period); | |
5cb9b40d | 1218 | return count; |
4a84067d VD |
1219 | } |
1220 | ||
276b20d0 HR |
1221 | static DEVICE_ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR, |
1222 | sdev_show_queue_ramp_up_period, | |
1223 | sdev_store_queue_ramp_up_period); | |
4a84067d | 1224 | |
276b20d0 HR |
1225 | static umode_t scsi_sdev_attr_is_visible(struct kobject *kobj, |
1226 | struct attribute *attr, int i) | |
1da177e4 | 1227 | { |
9e7bd945 | 1228 | struct device *dev = kobj_to_dev(kobj); |
1da177e4 | 1229 | struct scsi_device *sdev = to_scsi_device(dev); |
1da177e4 | 1230 | |
1da177e4 | 1231 | |
276b20d0 HR |
1232 | if (attr == &dev_attr_queue_depth.attr && |
1233 | !sdev->host->hostt->change_queue_depth) | |
1234 | return S_IRUGO; | |
1da177e4 | 1235 | |
276b20d0 HR |
1236 | if (attr == &dev_attr_queue_ramp_up_period.attr && |
1237 | !sdev->host->hostt->change_queue_depth) | |
1238 | return 0; | |
1da177e4 | 1239 | |
276b20d0 | 1240 | return attr->mode; |
1da177e4 LT |
1241 | } |
1242 | ||
7e47976b HR |
1243 | static umode_t scsi_sdev_bin_attr_is_visible(struct kobject *kobj, |
1244 | struct bin_attribute *attr, int i) | |
1245 | { | |
9e7bd945 | 1246 | struct device *dev = kobj_to_dev(kobj); |
7e47976b HR |
1247 | struct scsi_device *sdev = to_scsi_device(dev); |
1248 | ||
1249 | ||
d188b067 RA |
1250 | if (attr == &dev_attr_vpd_pg0 && !sdev->vpd_pg0) |
1251 | return 0; | |
1252 | ||
7e47976b HR |
1253 | if (attr == &dev_attr_vpd_pg80 && !sdev->vpd_pg80) |
1254 | return 0; | |
1255 | ||
68887582 | 1256 | if (attr == &dev_attr_vpd_pg83 && !sdev->vpd_pg83) |
7e47976b HR |
1257 | return 0; |
1258 | ||
d188b067 RA |
1259 | if (attr == &dev_attr_vpd_pg89 && !sdev->vpd_pg89) |
1260 | return 0; | |
1261 | ||
e60ac0b9 MP |
1262 | if (attr == &dev_attr_vpd_pgb0 && !sdev->vpd_pgb0) |
1263 | return 0; | |
1264 | ||
1265 | if (attr == &dev_attr_vpd_pgb1 && !sdev->vpd_pgb1) | |
1266 | return 0; | |
1267 | ||
1268 | if (attr == &dev_attr_vpd_pgb2 && !sdev->vpd_pgb2) | |
1269 | return 0; | |
1270 | ||
7e47976b HR |
1271 | return S_IRUGO; |
1272 | } | |
1273 | ||
276b20d0 HR |
1274 | /* Default template for device attributes. May NOT be modified */ |
1275 | static struct attribute *scsi_sdev_attrs[] = { | |
1276 | &dev_attr_device_blocked.attr, | |
1277 | &dev_attr_type.attr, | |
1278 | &dev_attr_scsi_level.attr, | |
1279 | &dev_attr_device_busy.attr, | |
1280 | &dev_attr_vendor.attr, | |
1281 | &dev_attr_model.attr, | |
1282 | &dev_attr_rev.attr, | |
1283 | &dev_attr_rescan.attr, | |
1284 | &dev_attr_delete.attr, | |
1285 | &dev_attr_state.attr, | |
1286 | &dev_attr_timeout.attr, | |
1287 | &dev_attr_eh_timeout.attr, | |
1288 | &dev_attr_iocounterbits.attr, | |
1289 | &dev_attr_iorequest_cnt.attr, | |
1290 | &dev_attr_iodone_cnt.attr, | |
1291 | &dev_attr_ioerr_cnt.attr, | |
1292 | &dev_attr_modalias.attr, | |
1293 | &dev_attr_queue_depth.attr, | |
1294 | &dev_attr_queue_type.attr, | |
248d4fe9 | 1295 | &dev_attr_wwid.attr, |
345e2960 | 1296 | &dev_attr_blacklist.attr, |
41f95dd2 HR |
1297 | #ifdef CONFIG_SCSI_DH |
1298 | &dev_attr_dh_state.attr, | |
77c9df96 HR |
1299 | &dev_attr_access_state.attr, |
1300 | &dev_attr_preferred_path.attr, | |
41f95dd2 | 1301 | #endif |
276b20d0 HR |
1302 | &dev_attr_queue_ramp_up_period.attr, |
1303 | REF_EVT(media_change), | |
1304 | REF_EVT(inquiry_change_reported), | |
1305 | REF_EVT(capacity_change_reported), | |
1306 | REF_EVT(soft_threshold_reached), | |
1307 | REF_EVT(mode_parameter_change_reported), | |
1308 | REF_EVT(lun_change_reported), | |
1309 | NULL | |
1310 | }; | |
1311 | ||
b3ae8780 | 1312 | static struct bin_attribute *scsi_sdev_bin_attrs[] = { |
d188b067 | 1313 | &dev_attr_vpd_pg0, |
b3ae8780 HR |
1314 | &dev_attr_vpd_pg83, |
1315 | &dev_attr_vpd_pg80, | |
d188b067 | 1316 | &dev_attr_vpd_pg89, |
e60ac0b9 MP |
1317 | &dev_attr_vpd_pgb0, |
1318 | &dev_attr_vpd_pgb1, | |
1319 | &dev_attr_vpd_pgb2, | |
92e6246c | 1320 | &dev_attr_inquiry, |
b3ae8780 HR |
1321 | NULL |
1322 | }; | |
276b20d0 HR |
1323 | static struct attribute_group scsi_sdev_attr_group = { |
1324 | .attrs = scsi_sdev_attrs, | |
b3ae8780 | 1325 | .bin_attrs = scsi_sdev_bin_attrs, |
276b20d0 | 1326 | .is_visible = scsi_sdev_attr_is_visible, |
7e47976b | 1327 | .is_bin_visible = scsi_sdev_bin_attr_is_visible, |
276b20d0 HR |
1328 | }; |
1329 | ||
1330 | static const struct attribute_group *scsi_sdev_attr_groups[] = { | |
1331 | &scsi_sdev_attr_group, | |
1332 | NULL | |
1333 | }; | |
1334 | ||
643eb2d9 JB |
1335 | static int scsi_target_add(struct scsi_target *starget) |
1336 | { | |
1337 | int error; | |
1338 | ||
1339 | if (starget->state != STARGET_CREATED) | |
1340 | return 0; | |
1341 | ||
1342 | error = device_add(&starget->dev); | |
1343 | if (error) { | |
1344 | dev_err(&starget->dev, "target device_add failed, error %d\n", error); | |
643eb2d9 JB |
1345 | return error; |
1346 | } | |
1347 | transport_add_device(&starget->dev); | |
1348 | starget->state = STARGET_RUNNING; | |
1349 | ||
bc4f2401 AS |
1350 | pm_runtime_set_active(&starget->dev); |
1351 | pm_runtime_enable(&starget->dev); | |
1352 | device_enable_async_suspend(&starget->dev); | |
1353 | ||
643eb2d9 JB |
1354 | return 0; |
1355 | } | |
1356 | ||
1da177e4 LT |
1357 | /** |
1358 | * scsi_sysfs_add_sdev - add scsi device to sysfs | |
1359 | * @sdev: scsi_device to add | |
1360 | * | |
1361 | * Return value: | |
1362 | * 0 on Success / non-zero on Failure | |
1363 | **/ | |
1364 | int scsi_sysfs_add_sdev(struct scsi_device *sdev) | |
1365 | { | |
92c4b58b | 1366 | int error; |
643eb2d9 | 1367 | struct scsi_target *starget = sdev->sdev_target; |
1da177e4 | 1368 | |
643eb2d9 JB |
1369 | error = scsi_target_add(starget); |
1370 | if (error) | |
1371 | return error; | |
1372 | ||
1373 | transport_configure_device(&starget->dev); | |
bc4f2401 | 1374 | |
4cb077d9 | 1375 | device_enable_async_suspend(&sdev->sdev_gendev); |
bc4f2401 AS |
1376 | scsi_autopm_get_target(starget); |
1377 | pm_runtime_set_active(&sdev->sdev_gendev); | |
c74f8056 SC |
1378 | if (!sdev->rpm_autosuspend) |
1379 | pm_runtime_forbid(&sdev->sdev_gendev); | |
bc4f2401 AS |
1380 | pm_runtime_enable(&sdev->sdev_gendev); |
1381 | scsi_autopm_put_target(starget); | |
1382 | ||
bc4f2401 AS |
1383 | scsi_autopm_get_device(sdev); |
1384 | ||
2930f817 | 1385 | scsi_dh_add_device(sdev); |
086b91d0 | 1386 | |
4cd2459c HR |
1387 | error = device_add(&sdev->sdev_gendev); |
1388 | if (error) { | |
1389 | sdev_printk(KERN_INFO, sdev, | |
1390 | "failed to add device: %d\n", error); | |
4cd2459c HR |
1391 | return error; |
1392 | } | |
1393 | ||
4cb077d9 | 1394 | device_enable_async_suspend(&sdev->sdev_dev); |
ee959b00 | 1395 | error = device_add(&sdev->sdev_dev); |
1da177e4 | 1396 | if (error) { |
73d8c34f AS |
1397 | sdev_printk(KERN_INFO, sdev, |
1398 | "failed to add class device: %d\n", error); | |
860dc736 | 1399 | device_del(&sdev->sdev_gendev); |
ee37e09d | 1400 | return error; |
1da177e4 | 1401 | } |
860dc736 JB |
1402 | transport_add_device(&sdev->sdev_gendev); |
1403 | sdev->is_visible = 1; | |
1da177e4 | 1404 | |
ead09dd3 CH |
1405 | if (IS_ENABLED(CONFIG_BLK_DEV_BSG)) { |
1406 | sdev->bsg_dev = scsi_bsg_register_queue(sdev); | |
1407 | if (IS_ERR(sdev->bsg_dev)) { | |
5f7cf82c | 1408 | error = PTR_ERR(sdev->bsg_dev); |
ead09dd3 CH |
1409 | sdev_printk(KERN_INFO, sdev, |
1410 | "Failed to register bsg queue, errno=%d\n", | |
1411 | error); | |
1412 | sdev->bsg_dev = NULL; | |
1413 | } | |
1414 | } | |
80ed71ce | 1415 | |
6fe8c1db | 1416 | scsi_autopm_put_device(sdev); |
1da177e4 LT |
1417 | return error; |
1418 | } | |
1419 | ||
903f4fed | 1420 | void __scsi_remove_device(struct scsi_device *sdev) |
1da177e4 | 1421 | { |
df133c21 | 1422 | struct device *dev = &sdev->sdev_gendev; |
0db6ca8a | 1423 | int res; |
df133c21 | 1424 | |
be821fd8 VK |
1425 | /* |
1426 | * This cleanup path is not reentrant and while it is impossible | |
1427 | * to get a new reference with scsi_device_get() someone can still | |
1428 | * hold a previously acquired one. | |
1429 | */ | |
1430 | if (sdev->sdev_state == SDEV_DEL) | |
1431 | return; | |
1432 | ||
860dc736 | 1433 | if (sdev->is_visible) { |
0db6ca8a BVA |
1434 | /* |
1435 | * If scsi_internal_target_block() is running concurrently, | |
1436 | * wait until it has finished before changing the device state. | |
1437 | */ | |
1438 | mutex_lock(&sdev->state_mutex); | |
255ee932 BVA |
1439 | /* |
1440 | * If blocked, we go straight to DEL and restart the queue so | |
1441 | * any commands issued during driver shutdown (like sync | |
1442 | * cache) are errored immediately. | |
1443 | */ | |
0db6ca8a | 1444 | res = scsi_device_set_state(sdev, SDEV_CANCEL); |
255ee932 BVA |
1445 | if (res != 0) { |
1446 | res = scsi_device_set_state(sdev, SDEV_DEL); | |
1447 | if (res == 0) | |
1448 | scsi_start_queue(sdev); | |
1449 | } | |
0db6ca8a BVA |
1450 | mutex_unlock(&sdev->state_mutex); |
1451 | ||
1452 | if (res != 0) | |
860dc736 | 1453 | return; |
1da177e4 | 1454 | |
ead09dd3 CH |
1455 | if (IS_ENABLED(CONFIG_BLK_DEV_BSG) && sdev->bsg_dev) |
1456 | bsg_unregister_queue(sdev->bsg_dev); | |
860dc736 JB |
1457 | device_unregister(&sdev->sdev_dev); |
1458 | transport_remove_device(dev); | |
e619e6cb BVA |
1459 | device_del(dev); |
1460 | } else | |
1461 | put_device(&sdev->sdev_dev); | |
b485462a BVA |
1462 | |
1463 | /* | |
1464 | * Stop accepting new requests and wait until all queuecommand() and | |
1465 | * scsi_run_queue() invocations have finished before tearing down the | |
1466 | * device. | |
1467 | */ | |
0db6ca8a | 1468 | mutex_lock(&sdev->state_mutex); |
1da177e4 | 1469 | scsi_device_set_state(sdev, SDEV_DEL); |
0db6ca8a BVA |
1470 | mutex_unlock(&sdev->state_mutex); |
1471 | ||
6f8191fd | 1472 | blk_mq_destroy_queue(sdev->request_queue); |
b485462a BVA |
1473 | cancel_work_sync(&sdev->requeue_work); |
1474 | ||
1da177e4 LT |
1475 | if (sdev->host->hostt->slave_destroy) |
1476 | sdev->host->hostt->slave_destroy(sdev); | |
df133c21 | 1477 | transport_destroy_device(dev); |
86cbfb56 | 1478 | |
e63ed0d7 JB |
1479 | /* |
1480 | * Paired with the kref_get() in scsi_sysfs_initialize(). We have | |
eee8910f | 1481 | * removed sysfs visibility from the device, so make the target |
e63ed0d7 JB |
1482 | * invisible if this was the last device underneath it. |
1483 | */ | |
1484 | scsi_target_reap(scsi_target(sdev)); | |
1485 | ||
df133c21 | 1486 | put_device(dev); |
903f4fed AS |
1487 | } |
1488 | ||
1489 | /** | |
1490 | * scsi_remove_device - unregister a device from the scsi bus | |
1491 | * @sdev: scsi_device to unregister | |
1492 | **/ | |
1493 | void scsi_remove_device(struct scsi_device *sdev) | |
1494 | { | |
54195002 AS |
1495 | struct Scsi_Host *shost = sdev->host; |
1496 | ||
0b950672 | 1497 | mutex_lock(&shost->scan_mutex); |
903f4fed | 1498 | __scsi_remove_device(sdev); |
0b950672 | 1499 | mutex_unlock(&shost->scan_mutex); |
1da177e4 LT |
1500 | } |
1501 | EXPORT_SYMBOL(scsi_remove_device); | |
1502 | ||
44818efb | 1503 | static void __scsi_remove_target(struct scsi_target *starget) |
1da177e4 LT |
1504 | { |
1505 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
1506 | unsigned long flags; | |
a64358db | 1507 | struct scsi_device *sdev; |
1da177e4 LT |
1508 | |
1509 | spin_lock_irqsave(shost->host_lock, flags); | |
a64358db AS |
1510 | restart: |
1511 | list_for_each_entry(sdev, &shost->__devices, siblings) { | |
fbce4d97 HR |
1512 | /* |
1513 | * We cannot call scsi_device_get() here, as | |
1514 | * we might've been called from rmmod() causing | |
1515 | * scsi_device_get() to fail the module_is_live() | |
1516 | * check. | |
1517 | */ | |
1da177e4 | 1518 | if (sdev->channel != starget->channel || |
81b6c999 HR |
1519 | sdev->id != starget->id) |
1520 | continue; | |
1521 | if (sdev->sdev_state == SDEV_DEL || | |
1522 | sdev->sdev_state == SDEV_CANCEL || | |
fbce4d97 | 1523 | !get_device(&sdev->sdev_gendev)) |
1da177e4 LT |
1524 | continue; |
1525 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1526 | scsi_remove_device(sdev); | |
fbce4d97 | 1527 | put_device(&sdev->sdev_gendev); |
1da177e4 | 1528 | spin_lock_irqsave(shost->host_lock, flags); |
a64358db | 1529 | goto restart; |
1da177e4 LT |
1530 | } |
1531 | spin_unlock_irqrestore(shost->host_lock, flags); | |
fe442604 BVA |
1532 | |
1533 | /* | |
1534 | * After scsi_remove_target() returns its caller can remove resources | |
1535 | * associated with @starget, e.g. an rport or session. Wait until all | |
1536 | * devices associated with @starget have been removed to prevent that | |
1537 | * a SCSI error handling callback function triggers a use-after-free. | |
1538 | */ | |
1539 | wait_event(starget->sdev_wq, atomic_read(&starget->sdev_count) == 0); | |
20b1e674 | 1540 | } |
1541 | ||
1da177e4 LT |
1542 | /** |
1543 | * scsi_remove_target - try to remove a target and all its devices | |
1544 | * @dev: generic starget or parent of generic stargets to be removed | |
1545 | * | |
1546 | * Note: This is slightly racy. It is possible that if the user | |
1547 | * requests the addition of another device then the target won't be | |
1548 | * removed. | |
1549 | */ | |
1550 | void scsi_remove_target(struct device *dev) | |
1551 | { | |
3b661a92 | 1552 | struct Scsi_Host *shost = dev_to_shost(dev->parent); |
305c2e71 | 1553 | struct scsi_target *starget; |
3b661a92 DW |
1554 | unsigned long flags; |
1555 | ||
40998193 | 1556 | restart: |
3b661a92 DW |
1557 | spin_lock_irqsave(shost->host_lock, flags); |
1558 | list_for_each_entry(starget, &shost->__targets, siblings) { | |
90a88d6e | 1559 | if (starget->state == STARGET_DEL || |
f9279c96 EM |
1560 | starget->state == STARGET_REMOVE || |
1561 | starget->state == STARGET_CREATED_REMOVE) | |
3b661a92 DW |
1562 | continue; |
1563 | if (starget->dev.parent == dev || &starget->dev == dev) { | |
e63ed0d7 | 1564 | kref_get(&starget->reap_ref); |
f9279c96 EM |
1565 | if (starget->state == STARGET_CREATED) |
1566 | starget->state = STARGET_CREATED_REMOVE; | |
1567 | else | |
1568 | starget->state = STARGET_REMOVE; | |
bc3f02a7 | 1569 | spin_unlock_irqrestore(shost->host_lock, flags); |
bc3f02a7 | 1570 | __scsi_remove_target(starget); |
40998193 CH |
1571 | scsi_target_reap(starget); |
1572 | goto restart; | |
3b661a92 | 1573 | } |
1da177e4 | 1574 | } |
3b661a92 | 1575 | spin_unlock_irqrestore(shost->host_lock, flags); |
1da177e4 LT |
1576 | } |
1577 | EXPORT_SYMBOL(scsi_remove_target); | |
1578 | ||
1579 | int scsi_register_driver(struct device_driver *drv) | |
1580 | { | |
1581 | drv->bus = &scsi_bus_type; | |
1582 | ||
1583 | return driver_register(drv); | |
1584 | } | |
1585 | EXPORT_SYMBOL(scsi_register_driver); | |
1586 | ||
1587 | int scsi_register_interface(struct class_interface *intf) | |
1588 | { | |
1589 | intf->class = &sdev_class; | |
1590 | ||
1591 | return class_interface_register(intf); | |
1592 | } | |
1593 | EXPORT_SYMBOL(scsi_register_interface); | |
1594 | ||
1da177e4 LT |
1595 | /** |
1596 | * scsi_sysfs_add_host - add scsi host to subsystem | |
1597 | * @shost: scsi host struct to add to subsystem | |
1da177e4 LT |
1598 | **/ |
1599 | int scsi_sysfs_add_host(struct Scsi_Host *shost) | |
1600 | { | |
1da177e4 | 1601 | transport_register_device(&shost->shost_gendev); |
d52b3815 | 1602 | transport_configure_device(&shost->shost_gendev); |
1da177e4 LT |
1603 | return 0; |
1604 | } | |
1605 | ||
bfd12944 KS |
1606 | static struct device_type scsi_dev_type = { |
1607 | .name = "scsi_device", | |
1608 | .release = scsi_device_dev_release, | |
1609 | .groups = scsi_sdev_attr_groups, | |
1610 | }; | |
1611 | ||
1da177e4 LT |
1612 | void scsi_sysfs_device_initialize(struct scsi_device *sdev) |
1613 | { | |
1614 | unsigned long flags; | |
1615 | struct Scsi_Host *shost = sdev->host; | |
92c4b58b | 1616 | struct scsi_host_template *hostt = shost->hostt; |
1da177e4 LT |
1617 | struct scsi_target *starget = sdev->sdev_target; |
1618 | ||
1619 | device_initialize(&sdev->sdev_gendev); | |
1620 | sdev->sdev_gendev.bus = &scsi_bus_type; | |
bfd12944 | 1621 | sdev->sdev_gendev.type = &scsi_dev_type; |
a19a93e4 | 1622 | scsi_enable_async_suspend(&sdev->sdev_gendev); |
9cb78c16 | 1623 | dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%llu", |
71610f55 | 1624 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); |
3a71f0f7 | 1625 | sdev->sdev_gendev.groups = hostt->sdev_groups; |
71610f55 | 1626 | |
ee959b00 | 1627 | device_initialize(&sdev->sdev_dev); |
37e6ba00 | 1628 | sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev); |
ee959b00 | 1629 | sdev->sdev_dev.class = &sdev_class; |
9cb78c16 | 1630 | dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%llu", |
71610f55 | 1631 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); |
50c4e964 AS |
1632 | /* |
1633 | * Get a default scsi_level from the target (derived from sibling | |
1634 | * devices). This is the best we can do for guessing how to set | |
1635 | * sdev->lun_in_cdb for the initial INQUIRY command. For LUN 0 the | |
1636 | * setting doesn't matter, because all the bits are zero anyway. | |
1637 | * But it does matter for higher LUNs. | |
1638 | */ | |
7c9d6f16 | 1639 | sdev->scsi_level = starget->scsi_level; |
50c4e964 AS |
1640 | if (sdev->scsi_level <= SCSI_2 && |
1641 | sdev->scsi_level != SCSI_UNKNOWN && | |
1642 | !shost->no_scsi2_lun_in_cdb) | |
1643 | sdev->lun_in_cdb = 1; | |
1644 | ||
1da177e4 LT |
1645 | transport_setup_device(&sdev->sdev_gendev); |
1646 | spin_lock_irqsave(shost->host_lock, flags); | |
1647 | list_add_tail(&sdev->same_target_siblings, &starget->devices); | |
1648 | list_add_tail(&sdev->siblings, &shost->__devices); | |
1649 | spin_unlock_irqrestore(shost->host_lock, flags); | |
fe442604 BVA |
1650 | |
1651 | atomic_inc(&starget->sdev_count); | |
1652 | ||
e63ed0d7 JB |
1653 | /* |
1654 | * device can now only be removed via __scsi_remove_device() so hold | |
1655 | * the target. Target will be held in CREATED state until something | |
1656 | * beneath it becomes visible (in which case it moves to RUNNING) | |
1657 | */ | |
1658 | kref_get(&starget->reap_ref); | |
1da177e4 LT |
1659 | } |
1660 | ||
1661 | int scsi_is_sdev_device(const struct device *dev) | |
1662 | { | |
13ba9bcb | 1663 | return dev->type == &scsi_dev_type; |
1da177e4 LT |
1664 | } |
1665 | EXPORT_SYMBOL(scsi_is_sdev_device); | |
1666 | ||
1667 | /* A blank transport template that is used in drivers that don't | |
1668 | * yet implement Transport Attributes */ | |
1669 | struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |