Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * scsi_sysfs.c | |
3 | * | |
4 | * SCSI sysfs interface routines. | |
5 | * | |
6 | * Created to pull SCSI mid layer sysfs routines into one file. | |
7 | */ | |
8 | ||
1da177e4 | 9 | #include <linux/module.h> |
5a0e3ad6 | 10 | #include <linux/slab.h> |
1da177e4 LT |
11 | #include <linux/init.h> |
12 | #include <linux/blkdev.h> | |
13 | #include <linux/device.h> | |
bc4f2401 | 14 | #include <linux/pm_runtime.h> |
1da177e4 LT |
15 | |
16 | #include <scsi/scsi.h> | |
17 | #include <scsi/scsi_device.h> | |
18 | #include <scsi/scsi_host.h> | |
19 | #include <scsi/scsi_tcq.h> | |
41f95dd2 | 20 | #include <scsi/scsi_dh.h> |
1da177e4 | 21 | #include <scsi/scsi_transport.h> |
44818efb | 22 | #include <scsi/scsi_driver.h> |
1da177e4 LT |
23 | |
24 | #include "scsi_priv.h" | |
25 | #include "scsi_logging.h" | |
26 | ||
b0ed4336 HR |
27 | static struct device_type scsi_dev_type; |
28 | ||
0ad78200 | 29 | static const struct { |
1da177e4 LT |
30 | enum scsi_device_state value; |
31 | char *name; | |
32 | } sdev_states[] = { | |
33 | { SDEV_CREATED, "created" }, | |
34 | { SDEV_RUNNING, "running" }, | |
35 | { SDEV_CANCEL, "cancel" }, | |
36 | { SDEV_DEL, "deleted" }, | |
37 | { SDEV_QUIESCE, "quiesce" }, | |
38 | { SDEV_OFFLINE, "offline" }, | |
1b8d2620 | 39 | { SDEV_TRANSPORT_OFFLINE, "transport-offline" }, |
1da177e4 | 40 | { SDEV_BLOCK, "blocked" }, |
6f4267e3 | 41 | { SDEV_CREATED_BLOCK, "created-blocked" }, |
1da177e4 LT |
42 | }; |
43 | ||
44 | const char *scsi_device_state_name(enum scsi_device_state state) | |
45 | { | |
46 | int i; | |
47 | char *name = NULL; | |
48 | ||
6391a113 | 49 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
50 | if (sdev_states[i].value == state) { |
51 | name = sdev_states[i].name; | |
52 | break; | |
53 | } | |
54 | } | |
55 | return name; | |
56 | } | |
57 | ||
0ad78200 | 58 | static const struct { |
d3301874 MA |
59 | enum scsi_host_state value; |
60 | char *name; | |
61 | } shost_states[] = { | |
62 | { SHOST_CREATED, "created" }, | |
63 | { SHOST_RUNNING, "running" }, | |
64 | { SHOST_CANCEL, "cancel" }, | |
65 | { SHOST_DEL, "deleted" }, | |
66 | { SHOST_RECOVERY, "recovery" }, | |
939647ee JB |
67 | { SHOST_CANCEL_RECOVERY, "cancel/recovery" }, |
68 | { SHOST_DEL_RECOVERY, "deleted/recovery", }, | |
d3301874 MA |
69 | }; |
70 | const char *scsi_host_state_name(enum scsi_host_state state) | |
71 | { | |
72 | int i; | |
73 | char *name = NULL; | |
74 | ||
6391a113 | 75 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
76 | if (shost_states[i].value == state) { |
77 | name = shost_states[i].name; | |
78 | break; | |
79 | } | |
80 | } | |
81 | return name; | |
82 | } | |
83 | ||
9cb78c16 | 84 | static int check_set(unsigned long long *val, char *src) |
1da177e4 LT |
85 | { |
86 | char *last; | |
87 | ||
88 | if (strncmp(src, "-", 20) == 0) { | |
89 | *val = SCAN_WILD_CARD; | |
90 | } else { | |
91 | /* | |
92 | * Doesn't check for int overflow | |
93 | */ | |
9cb78c16 | 94 | *val = simple_strtoull(src, &last, 0); |
1da177e4 LT |
95 | if (*last != '\0') |
96 | return 1; | |
97 | } | |
98 | return 0; | |
99 | } | |
100 | ||
101 | static int scsi_scan(struct Scsi_Host *shost, const char *str) | |
102 | { | |
9cb78c16 HR |
103 | char s1[15], s2[15], s3[17], junk; |
104 | unsigned long long channel, id, lun; | |
1da177e4 LT |
105 | int res; |
106 | ||
9cb78c16 | 107 | res = sscanf(str, "%10s %10s %16s %c", s1, s2, s3, &junk); |
1da177e4 LT |
108 | if (res != 3) |
109 | return -EINVAL; | |
110 | if (check_set(&channel, s1)) | |
111 | return -EINVAL; | |
112 | if (check_set(&id, s2)) | |
113 | return -EINVAL; | |
114 | if (check_set(&lun, s3)) | |
115 | return -EINVAL; | |
e02f3f59 CH |
116 | if (shost->transportt->user_scan) |
117 | res = shost->transportt->user_scan(shost, channel, id, lun); | |
118 | else | |
119 | res = scsi_scan_host_selected(shost, channel, id, lun, 1); | |
1da177e4 LT |
120 | return res; |
121 | } | |
122 | ||
123 | /* | |
124 | * shost_show_function: macro to create an attr function that can be used to | |
125 | * show a non-bit field. | |
126 | */ | |
127 | #define shost_show_function(name, field, format_string) \ | |
128 | static ssize_t \ | |
ee959b00 TJ |
129 | show_##name (struct device *dev, struct device_attribute *attr, \ |
130 | char *buf) \ | |
1da177e4 | 131 | { \ |
ee959b00 | 132 | struct Scsi_Host *shost = class_to_shost(dev); \ |
1da177e4 LT |
133 | return snprintf (buf, 20, format_string, shost->field); \ |
134 | } | |
135 | ||
136 | /* | |
137 | * shost_rd_attr: macro to create a function and attribute variable for a | |
138 | * read only field. | |
139 | */ | |
140 | #define shost_rd_attr2(name, field, format_string) \ | |
141 | shost_show_function(name, field, format_string) \ | |
ee959b00 | 142 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); |
1da177e4 LT |
143 | |
144 | #define shost_rd_attr(field, format_string) \ | |
145 | shost_rd_attr2(field, field, format_string) | |
146 | ||
147 | /* | |
148 | * Create the actual show/store functions and data structures. | |
149 | */ | |
150 | ||
ee959b00 TJ |
151 | static ssize_t |
152 | store_scan(struct device *dev, struct device_attribute *attr, | |
153 | const char *buf, size_t count) | |
1da177e4 | 154 | { |
ee959b00 | 155 | struct Scsi_Host *shost = class_to_shost(dev); |
1da177e4 LT |
156 | int res; |
157 | ||
158 | res = scsi_scan(shost, buf); | |
159 | if (res == 0) | |
160 | res = count; | |
161 | return res; | |
162 | }; | |
ee959b00 | 163 | static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); |
1da177e4 | 164 | |
d3301874 | 165 | static ssize_t |
ee959b00 TJ |
166 | store_shost_state(struct device *dev, struct device_attribute *attr, |
167 | const char *buf, size_t count) | |
d3301874 MA |
168 | { |
169 | int i; | |
ee959b00 | 170 | struct Scsi_Host *shost = class_to_shost(dev); |
d3301874 MA |
171 | enum scsi_host_state state = 0; |
172 | ||
6391a113 | 173 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
174 | const int len = strlen(shost_states[i].name); |
175 | if (strncmp(shost_states[i].name, buf, len) == 0 && | |
176 | buf[len] == '\n') { | |
177 | state = shost_states[i].value; | |
178 | break; | |
179 | } | |
180 | } | |
181 | if (!state) | |
182 | return -EINVAL; | |
183 | ||
184 | if (scsi_host_set_state(shost, state)) | |
185 | return -EINVAL; | |
186 | return count; | |
187 | } | |
188 | ||
189 | static ssize_t | |
ee959b00 | 190 | show_shost_state(struct device *dev, struct device_attribute *attr, char *buf) |
d3301874 | 191 | { |
ee959b00 | 192 | struct Scsi_Host *shost = class_to_shost(dev); |
d3301874 MA |
193 | const char *name = scsi_host_state_name(shost->shost_state); |
194 | ||
195 | if (!name) | |
196 | return -EINVAL; | |
197 | ||
198 | return snprintf(buf, 20, "%s\n", name); | |
199 | } | |
200 | ||
ee959b00 TJ |
201 | /* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */ |
202 | struct device_attribute dev_attr_hstate = | |
203 | __ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state); | |
d3301874 | 204 | |
5dc2b89e FT |
205 | static ssize_t |
206 | show_shost_mode(unsigned int mode, char *buf) | |
207 | { | |
208 | ssize_t len = 0; | |
209 | ||
210 | if (mode & MODE_INITIATOR) | |
211 | len = sprintf(buf, "%s", "Initiator"); | |
212 | ||
213 | if (mode & MODE_TARGET) | |
214 | len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target"); | |
215 | ||
216 | len += sprintf(buf + len, "\n"); | |
217 | ||
218 | return len; | |
219 | } | |
220 | ||
ee959b00 TJ |
221 | static ssize_t |
222 | show_shost_supported_mode(struct device *dev, struct device_attribute *attr, | |
223 | char *buf) | |
5dc2b89e | 224 | { |
ee959b00 | 225 | struct Scsi_Host *shost = class_to_shost(dev); |
7a39ac3f | 226 | unsigned int supported_mode = shost->hostt->supported_mode; |
5dc2b89e | 227 | |
7a39ac3f JB |
228 | if (supported_mode == MODE_UNKNOWN) |
229 | /* by default this should be initiator */ | |
230 | supported_mode = MODE_INITIATOR; | |
231 | ||
232 | return show_shost_mode(supported_mode, buf); | |
5dc2b89e FT |
233 | } |
234 | ||
ee959b00 | 235 | static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL); |
5dc2b89e | 236 | |
ee959b00 TJ |
237 | static ssize_t |
238 | show_shost_active_mode(struct device *dev, | |
239 | struct device_attribute *attr, char *buf) | |
5dc2b89e | 240 | { |
ee959b00 | 241 | struct Scsi_Host *shost = class_to_shost(dev); |
5dc2b89e FT |
242 | |
243 | if (shost->active_mode == MODE_UNKNOWN) | |
244 | return snprintf(buf, 20, "unknown\n"); | |
245 | else | |
246 | return show_shost_mode(shost->active_mode, buf); | |
247 | } | |
248 | ||
ee959b00 | 249 | static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL); |
5dc2b89e | 250 | |
072f19b4 | 251 | static int check_reset_type(const char *str) |
29443691 | 252 | { |
072f19b4 | 253 | if (sysfs_streq(str, "adapter")) |
29443691 | 254 | return SCSI_ADAPTER_RESET; |
072f19b4 | 255 | else if (sysfs_streq(str, "firmware")) |
29443691 VC |
256 | return SCSI_FIRMWARE_RESET; |
257 | else | |
258 | return 0; | |
259 | } | |
260 | ||
261 | static ssize_t | |
262 | store_host_reset(struct device *dev, struct device_attribute *attr, | |
263 | const char *buf, size_t count) | |
264 | { | |
265 | struct Scsi_Host *shost = class_to_shost(dev); | |
266 | struct scsi_host_template *sht = shost->hostt; | |
267 | int ret = -EINVAL; | |
29443691 VC |
268 | int type; |
269 | ||
072f19b4 | 270 | type = check_reset_type(buf); |
29443691 VC |
271 | if (!type) |
272 | goto exit_store_host_reset; | |
273 | ||
274 | if (sht->host_reset) | |
275 | ret = sht->host_reset(shost, type); | |
276 | ||
277 | exit_store_host_reset: | |
278 | if (ret == 0) | |
279 | ret = count; | |
280 | return ret; | |
281 | } | |
282 | ||
283 | static DEVICE_ATTR(host_reset, S_IWUSR, NULL, store_host_reset); | |
284 | ||
b4562022 HR |
285 | static ssize_t |
286 | show_shost_eh_deadline(struct device *dev, | |
287 | struct device_attribute *attr, char *buf) | |
288 | { | |
289 | struct Scsi_Host *shost = class_to_shost(dev); | |
290 | ||
bb3b621a RM |
291 | if (shost->eh_deadline == -1) |
292 | return snprintf(buf, strlen("off") + 2, "off\n"); | |
293 | return sprintf(buf, "%u\n", shost->eh_deadline / HZ); | |
b4562022 HR |
294 | } |
295 | ||
296 | static ssize_t | |
297 | store_shost_eh_deadline(struct device *dev, struct device_attribute *attr, | |
298 | const char *buf, size_t count) | |
299 | { | |
300 | struct Scsi_Host *shost = class_to_shost(dev); | |
301 | int ret = -EINVAL; | |
bb3b621a | 302 | unsigned long deadline, flags; |
b4562022 | 303 | |
ad469a57 HR |
304 | if (shost->transportt && |
305 | (shost->transportt->eh_strategy_handler || | |
306 | !shost->hostt->eh_host_reset_handler)) | |
b4562022 HR |
307 | return ret; |
308 | ||
bb3b621a RM |
309 | if (!strncmp(buf, "off", strlen("off"))) |
310 | deadline = -1; | |
311 | else { | |
312 | ret = kstrtoul(buf, 10, &deadline); | |
313 | if (ret) | |
314 | return ret; | |
315 | if (deadline * HZ > UINT_MAX) | |
316 | return -EINVAL; | |
317 | } | |
318 | ||
319 | spin_lock_irqsave(shost->host_lock, flags); | |
320 | if (scsi_host_in_recovery(shost)) | |
321 | ret = -EBUSY; | |
322 | else { | |
323 | if (deadline == -1) | |
324 | shost->eh_deadline = -1; | |
325 | else | |
b4562022 | 326 | shost->eh_deadline = deadline * HZ; |
bb3b621a RM |
327 | |
328 | ret = count; | |
b4562022 | 329 | } |
bb3b621a RM |
330 | spin_unlock_irqrestore(shost->host_lock, flags); |
331 | ||
b4562022 HR |
332 | return ret; |
333 | } | |
334 | ||
335 | static DEVICE_ATTR(eh_deadline, S_IRUGO | S_IWUSR, show_shost_eh_deadline, store_shost_eh_deadline); | |
336 | ||
d285203c | 337 | shost_rd_attr(use_blk_mq, "%d\n"); |
1da177e4 | 338 | shost_rd_attr(unique_id, "%u\n"); |
1da177e4 | 339 | shost_rd_attr(cmd_per_lun, "%hd\n"); |
ed632da8 | 340 | shost_rd_attr(can_queue, "%hd\n"); |
1da177e4 | 341 | shost_rd_attr(sg_tablesize, "%hu\n"); |
13f05c8d | 342 | shost_rd_attr(sg_prot_tablesize, "%hu\n"); |
1da177e4 | 343 | shost_rd_attr(unchecked_isa_dma, "%d\n"); |
4469f987 MP |
344 | shost_rd_attr(prot_capabilities, "%u\n"); |
345 | shost_rd_attr(prot_guard_type, "%hd\n"); | |
1da177e4 LT |
346 | shost_rd_attr2(proc_name, hostt->proc_name, "%s\n"); |
347 | ||
74665016 CH |
348 | static ssize_t |
349 | show_host_busy(struct device *dev, struct device_attribute *attr, char *buf) | |
350 | { | |
351 | struct Scsi_Host *shost = class_to_shost(dev); | |
352 | return snprintf(buf, 20, "%d\n", atomic_read(&shost->host_busy)); | |
353 | } | |
354 | static DEVICE_ATTR(host_busy, S_IRUGO, show_host_busy, NULL); | |
355 | ||
f7120a4f | 356 | static struct attribute *scsi_sysfs_shost_attrs[] = { |
d285203c | 357 | &dev_attr_use_blk_mq.attr, |
f7120a4f HR |
358 | &dev_attr_unique_id.attr, |
359 | &dev_attr_host_busy.attr, | |
360 | &dev_attr_cmd_per_lun.attr, | |
361 | &dev_attr_can_queue.attr, | |
362 | &dev_attr_sg_tablesize.attr, | |
13f05c8d | 363 | &dev_attr_sg_prot_tablesize.attr, |
f7120a4f HR |
364 | &dev_attr_unchecked_isa_dma.attr, |
365 | &dev_attr_proc_name.attr, | |
366 | &dev_attr_scan.attr, | |
367 | &dev_attr_hstate.attr, | |
368 | &dev_attr_supported_mode.attr, | |
369 | &dev_attr_active_mode.attr, | |
4469f987 MP |
370 | &dev_attr_prot_capabilities.attr, |
371 | &dev_attr_prot_guard_type.attr, | |
29443691 | 372 | &dev_attr_host_reset.attr, |
b4562022 | 373 | &dev_attr_eh_deadline.attr, |
f7120a4f HR |
374 | NULL |
375 | }; | |
376 | ||
377 | struct attribute_group scsi_shost_attr_group = { | |
378 | .attrs = scsi_sysfs_shost_attrs, | |
379 | }; | |
380 | ||
a4dbd674 | 381 | const struct attribute_group *scsi_sysfs_shost_attr_groups[] = { |
f7120a4f | 382 | &scsi_shost_attr_group, |
1da177e4 LT |
383 | NULL |
384 | }; | |
385 | ||
ee959b00 | 386 | static void scsi_device_cls_release(struct device *class_dev) |
1da177e4 LT |
387 | { |
388 | struct scsi_device *sdev; | |
389 | ||
390 | sdev = class_to_sdev(class_dev); | |
391 | put_device(&sdev->sdev_gendev); | |
392 | } | |
393 | ||
65f27f38 | 394 | static void scsi_device_dev_release_usercontext(struct work_struct *work) |
1da177e4 LT |
395 | { |
396 | struct scsi_device *sdev; | |
397 | struct device *parent; | |
a341cd0f | 398 | struct list_head *this, *tmp; |
1da177e4 LT |
399 | unsigned long flags; |
400 | ||
65f27f38 DH |
401 | sdev = container_of(work, struct scsi_device, ew.work); |
402 | ||
23695e41 JN |
403 | scsi_dh_release_device(sdev); |
404 | ||
65f27f38 | 405 | parent = sdev->sdev_gendev.parent; |
1da177e4 LT |
406 | |
407 | spin_lock_irqsave(sdev->host->host_lock, flags); | |
1da177e4 LT |
408 | list_del(&sdev->siblings); |
409 | list_del(&sdev->same_target_siblings); | |
410 | list_del(&sdev->starved_entry); | |
411 | spin_unlock_irqrestore(sdev->host->host_lock, flags); | |
412 | ||
a341cd0f JG |
413 | cancel_work_sync(&sdev->event_work); |
414 | ||
415 | list_for_each_safe(this, tmp, &sdev->event_list) { | |
416 | struct scsi_event *evt; | |
417 | ||
418 | evt = list_entry(this, struct scsi_event, node); | |
419 | list_del(&evt->node); | |
420 | kfree(evt); | |
421 | } | |
422 | ||
e73e079b | 423 | blk_put_queue(sdev->request_queue); |
86cbfb56 JB |
424 | /* NULL queue means the device can't be used */ |
425 | sdev->request_queue = NULL; | |
1da177e4 | 426 | |
b3ae8780 HR |
427 | kfree(sdev->vpd_pg83); |
428 | kfree(sdev->vpd_pg80); | |
1da177e4 LT |
429 | kfree(sdev->inquiry); |
430 | kfree(sdev); | |
431 | ||
432 | if (parent) | |
433 | put_device(parent); | |
434 | } | |
435 | ||
65110b21 JB |
436 | static void scsi_device_dev_release(struct device *dev) |
437 | { | |
ffedb452 | 438 | struct scsi_device *sdp = to_scsi_device(dev); |
65f27f38 | 439 | execute_in_process_context(scsi_device_dev_release_usercontext, |
ffedb452 | 440 | &sdp->ew); |
65110b21 JB |
441 | } |
442 | ||
52c1da39 | 443 | static struct class sdev_class = { |
1da177e4 | 444 | .name = "scsi_device", |
ee959b00 | 445 | .dev_release = scsi_device_cls_release, |
1da177e4 LT |
446 | }; |
447 | ||
448 | /* all probing is done in the individual ->probe routines */ | |
449 | static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) | |
450 | { | |
b0ed4336 HR |
451 | struct scsi_device *sdp; |
452 | ||
453 | if (dev->type != &scsi_dev_type) | |
454 | return 0; | |
455 | ||
456 | sdp = to_scsi_device(dev); | |
1da177e4 LT |
457 | if (sdp->no_uld_attach) |
458 | return 0; | |
459 | return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; | |
460 | } | |
461 | ||
7eff2e7a | 462 | static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
d7b8bcb0 | 463 | { |
1f42ea7b JB |
464 | struct scsi_device *sdev; |
465 | ||
466 | if (dev->type != &scsi_dev_type) | |
467 | return 0; | |
468 | ||
469 | sdev = to_scsi_device(dev); | |
d7b8bcb0 | 470 | |
7eff2e7a | 471 | add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type); |
d7b8bcb0 MT |
472 | return 0; |
473 | } | |
474 | ||
1da177e4 LT |
475 | struct bus_type scsi_bus_type = { |
476 | .name = "scsi", | |
477 | .match = scsi_bus_match, | |
d7b8bcb0 | 478 | .uevent = scsi_bus_uevent, |
aa338601 | 479 | #ifdef CONFIG_PM |
db5bd1e0 | 480 | .pm = &scsi_bus_pm_ops, |
e6da54d8 | 481 | #endif |
1da177e4 | 482 | }; |
a6a8d9f8 | 483 | EXPORT_SYMBOL_GPL(scsi_bus_type); |
1da177e4 LT |
484 | |
485 | int scsi_sysfs_register(void) | |
486 | { | |
487 | int error; | |
488 | ||
489 | error = bus_register(&scsi_bus_type); | |
490 | if (!error) { | |
491 | error = class_register(&sdev_class); | |
492 | if (error) | |
493 | bus_unregister(&scsi_bus_type); | |
494 | } | |
495 | ||
496 | return error; | |
497 | } | |
498 | ||
499 | void scsi_sysfs_unregister(void) | |
500 | { | |
501 | class_unregister(&sdev_class); | |
502 | bus_unregister(&scsi_bus_type); | |
503 | } | |
504 | ||
505 | /* | |
506 | * sdev_show_function: macro to create an attr function that can be used to | |
507 | * show a non-bit field. | |
508 | */ | |
509 | #define sdev_show_function(field, format_string) \ | |
510 | static ssize_t \ | |
ee959b00 TJ |
511 | sdev_show_##field (struct device *dev, struct device_attribute *attr, \ |
512 | char *buf) \ | |
1da177e4 LT |
513 | { \ |
514 | struct scsi_device *sdev; \ | |
515 | sdev = to_scsi_device(dev); \ | |
516 | return snprintf (buf, 20, format_string, sdev->field); \ | |
517 | } \ | |
518 | ||
519 | /* | |
520 | * sdev_rd_attr: macro to create a function and attribute variable for a | |
521 | * read only field. | |
522 | */ | |
523 | #define sdev_rd_attr(field, format_string) \ | |
524 | sdev_show_function(field, format_string) \ | |
525 | static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); | |
526 | ||
527 | ||
528 | /* | |
160e7f67 | 529 | * sdev_rw_attr: create a function and attribute variable for a |
1da177e4 LT |
530 | * read/write field. |
531 | */ | |
532 | #define sdev_rw_attr(field, format_string) \ | |
533 | sdev_show_function(field, format_string) \ | |
534 | \ | |
535 | static ssize_t \ | |
ee959b00 TJ |
536 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
537 | const char *buf, size_t count) \ | |
1da177e4 LT |
538 | { \ |
539 | struct scsi_device *sdev; \ | |
540 | sdev = to_scsi_device(dev); \ | |
160e7f67 | 541 | sscanf (buf, format_string, &sdev->field); \ |
1da177e4 LT |
542 | return count; \ |
543 | } \ | |
544 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
545 | ||
546 | /* Currently we don't export bit fields, but we might in future, | |
547 | * so leave this code in */ | |
548 | #if 0 | |
549 | /* | |
550 | * sdev_rd_attr: create a function and attribute variable for a | |
551 | * read/write bit field. | |
552 | */ | |
553 | #define sdev_rw_attr_bit(field) \ | |
554 | sdev_show_function(field, "%d\n") \ | |
555 | \ | |
556 | static ssize_t \ | |
ee959b00 TJ |
557 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
558 | const char *buf, size_t count) \ | |
1da177e4 LT |
559 | { \ |
560 | int ret; \ | |
561 | struct scsi_device *sdev; \ | |
562 | ret = scsi_sdev_check_buf_bit(buf); \ | |
563 | if (ret >= 0) { \ | |
564 | sdev = to_scsi_device(dev); \ | |
565 | sdev->field = ret; \ | |
566 | ret = count; \ | |
567 | } \ | |
568 | return ret; \ | |
569 | } \ | |
570 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
571 | ||
572 | /* | |
573 | * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", | |
574 | * else return -EINVAL. | |
575 | */ | |
576 | static int scsi_sdev_check_buf_bit(const char *buf) | |
577 | { | |
578 | if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { | |
579 | if (buf[0] == '1') | |
580 | return 1; | |
581 | else if (buf[0] == '0') | |
582 | return 0; | |
583 | else | |
584 | return -EINVAL; | |
585 | } else | |
586 | return -EINVAL; | |
587 | } | |
588 | #endif | |
589 | /* | |
590 | * Create the actual show/store functions and data structures. | |
591 | */ | |
1da177e4 LT |
592 | sdev_rd_attr (type, "%d\n"); |
593 | sdev_rd_attr (scsi_level, "%d\n"); | |
594 | sdev_rd_attr (vendor, "%.8s\n"); | |
595 | sdev_rd_attr (model, "%.16s\n"); | |
596 | sdev_rd_attr (rev, "%.4s\n"); | |
597 | ||
71e75c97 CH |
598 | static ssize_t |
599 | sdev_show_device_busy(struct device *dev, struct device_attribute *attr, | |
600 | char *buf) | |
601 | { | |
602 | struct scsi_device *sdev = to_scsi_device(dev); | |
603 | return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_busy)); | |
604 | } | |
605 | static DEVICE_ATTR(device_busy, S_IRUGO, sdev_show_device_busy, NULL); | |
606 | ||
cd9070c9 CH |
607 | static ssize_t |
608 | sdev_show_device_blocked(struct device *dev, struct device_attribute *attr, | |
609 | char *buf) | |
610 | { | |
611 | struct scsi_device *sdev = to_scsi_device(dev); | |
612 | return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_blocked)); | |
613 | } | |
614 | static DEVICE_ATTR(device_blocked, S_IRUGO, sdev_show_device_blocked, NULL); | |
615 | ||
242f9dcb JA |
616 | /* |
617 | * TODO: can we make these symlinks to the block layer ones? | |
618 | */ | |
1da177e4 | 619 | static ssize_t |
10523b3b | 620 | sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
621 | { |
622 | struct scsi_device *sdev; | |
623 | sdev = to_scsi_device(dev); | |
242f9dcb | 624 | return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ); |
1da177e4 LT |
625 | } |
626 | ||
627 | static ssize_t | |
ee959b00 TJ |
628 | sdev_store_timeout (struct device *dev, struct device_attribute *attr, |
629 | const char *buf, size_t count) | |
1da177e4 LT |
630 | { |
631 | struct scsi_device *sdev; | |
632 | int timeout; | |
633 | sdev = to_scsi_device(dev); | |
634 | sscanf (buf, "%d\n", &timeout); | |
242f9dcb | 635 | blk_queue_rq_timeout(sdev->request_queue, timeout * HZ); |
1da177e4 LT |
636 | return count; |
637 | } | |
638 | static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); | |
639 | ||
0816c925 MP |
640 | static ssize_t |
641 | sdev_show_eh_timeout(struct device *dev, struct device_attribute *attr, char *buf) | |
642 | { | |
643 | struct scsi_device *sdev; | |
644 | sdev = to_scsi_device(dev); | |
645 | return snprintf(buf, 20, "%u\n", sdev->eh_timeout / HZ); | |
646 | } | |
647 | ||
648 | static ssize_t | |
649 | sdev_store_eh_timeout(struct device *dev, struct device_attribute *attr, | |
650 | const char *buf, size_t count) | |
651 | { | |
652 | struct scsi_device *sdev; | |
653 | unsigned int eh_timeout; | |
654 | int err; | |
655 | ||
656 | if (!capable(CAP_SYS_ADMIN)) | |
657 | return -EACCES; | |
658 | ||
659 | sdev = to_scsi_device(dev); | |
660 | err = kstrtouint(buf, 10, &eh_timeout); | |
661 | if (err) | |
662 | return err; | |
663 | sdev->eh_timeout = eh_timeout * HZ; | |
664 | ||
665 | return count; | |
666 | } | |
667 | static DEVICE_ATTR(eh_timeout, S_IRUGO | S_IWUSR, sdev_show_eh_timeout, sdev_store_eh_timeout); | |
668 | ||
1da177e4 | 669 | static ssize_t |
ee959b00 TJ |
670 | store_rescan_field (struct device *dev, struct device_attribute *attr, |
671 | const char *buf, size_t count) | |
1da177e4 LT |
672 | { |
673 | scsi_rescan_device(dev); | |
674 | return count; | |
675 | } | |
676 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); | |
677 | ||
ee959b00 TJ |
678 | static ssize_t |
679 | sdev_store_delete(struct device *dev, struct device_attribute *attr, | |
680 | const char *buf, size_t count) | |
1da177e4 | 681 | { |
ac0ece91 TH |
682 | if (device_remove_file_self(dev, attr)) |
683 | scsi_remove_device(to_scsi_device(dev)); | |
1da177e4 LT |
684 | return count; |
685 | }; | |
686 | static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); | |
687 | ||
688 | static ssize_t | |
ee959b00 TJ |
689 | store_state_field(struct device *dev, struct device_attribute *attr, |
690 | const char *buf, size_t count) | |
1da177e4 LT |
691 | { |
692 | int i; | |
693 | struct scsi_device *sdev = to_scsi_device(dev); | |
694 | enum scsi_device_state state = 0; | |
695 | ||
6391a113 | 696 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
697 | const int len = strlen(sdev_states[i].name); |
698 | if (strncmp(sdev_states[i].name, buf, len) == 0 && | |
699 | buf[len] == '\n') { | |
700 | state = sdev_states[i].value; | |
701 | break; | |
702 | } | |
703 | } | |
704 | if (!state) | |
705 | return -EINVAL; | |
706 | ||
707 | if (scsi_device_set_state(sdev, state)) | |
708 | return -EINVAL; | |
709 | return count; | |
710 | } | |
711 | ||
712 | static ssize_t | |
10523b3b | 713 | show_state_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
714 | { |
715 | struct scsi_device *sdev = to_scsi_device(dev); | |
716 | const char *name = scsi_device_state_name(sdev->sdev_state); | |
717 | ||
718 | if (!name) | |
719 | return -EINVAL; | |
720 | ||
721 | return snprintf(buf, 20, "%s\n", name); | |
722 | } | |
723 | ||
724 | static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); | |
725 | ||
726 | static ssize_t | |
ee959b00 TJ |
727 | show_queue_type_field(struct device *dev, struct device_attribute *attr, |
728 | char *buf) | |
1da177e4 LT |
729 | { |
730 | struct scsi_device *sdev = to_scsi_device(dev); | |
731 | const char *name = "none"; | |
732 | ||
609aa22f | 733 | if (sdev->simple_tags) |
1da177e4 LT |
734 | name = "simple"; |
735 | ||
736 | return snprintf(buf, 20, "%s\n", name); | |
737 | } | |
738 | ||
276b20d0 HR |
739 | static ssize_t |
740 | store_queue_type_field(struct device *dev, struct device_attribute *attr, | |
741 | const char *buf, size_t count) | |
742 | { | |
743 | struct scsi_device *sdev = to_scsi_device(dev); | |
276b20d0 | 744 | |
efc3c1df | 745 | if (!sdev->tagged_supported) |
276b20d0 | 746 | return -EINVAL; |
efc3c1df CH |
747 | |
748 | sdev_printk(KERN_INFO, sdev, | |
749 | "ignoring write to deprecated queue_type attribute"); | |
276b20d0 HR |
750 | return count; |
751 | } | |
752 | ||
753 | static DEVICE_ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, | |
754 | store_queue_type_field); | |
1da177e4 | 755 | |
b3ae8780 HR |
756 | #define sdev_vpd_pg_attr(_page) \ |
757 | static ssize_t \ | |
758 | show_vpd_##_page(struct file *filp, struct kobject *kobj, \ | |
759 | struct bin_attribute *bin_attr, \ | |
760 | char *buf, loff_t off, size_t count) \ | |
761 | { \ | |
762 | struct device *dev = container_of(kobj, struct device, kobj); \ | |
763 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
09e2b0b1 | 764 | int ret; \ |
b3ae8780 HR |
765 | if (!sdev->vpd_##_page) \ |
766 | return -EINVAL; \ | |
09e2b0b1 HR |
767 | rcu_read_lock(); \ |
768 | ret = memory_read_from_buffer(buf, count, &off, \ | |
769 | rcu_dereference(sdev->vpd_##_page), \ | |
b3ae8780 | 770 | sdev->vpd_##_page##_len); \ |
09e2b0b1 HR |
771 | rcu_read_unlock(); \ |
772 | return ret; \ | |
b3ae8780 HR |
773 | } \ |
774 | static struct bin_attribute dev_attr_vpd_##_page = { \ | |
775 | .attr = {.name = __stringify(vpd_##_page), .mode = S_IRUGO }, \ | |
776 | .size = 0, \ | |
777 | .read = show_vpd_##_page, \ | |
778 | }; | |
779 | ||
780 | sdev_vpd_pg_attr(pg83); | |
781 | sdev_vpd_pg_attr(pg80); | |
1da177e4 | 782 | |
92e6246c JT |
783 | static ssize_t show_inquiry(struct file *filep, struct kobject *kobj, |
784 | struct bin_attribute *bin_attr, | |
785 | char *buf, loff_t off, size_t count) | |
786 | { | |
787 | struct device *dev = container_of(kobj, struct device, kobj); | |
788 | struct scsi_device *sdev = to_scsi_device(dev); | |
789 | ||
790 | if (!sdev->inquiry) | |
791 | return -EINVAL; | |
792 | ||
793 | return memory_read_from_buffer(buf, count, &off, sdev->inquiry, | |
794 | sdev->inquiry_len); | |
795 | } | |
796 | ||
797 | static struct bin_attribute dev_attr_inquiry = { | |
798 | .attr = { | |
799 | .name = "inquiry", | |
800 | .mode = S_IRUGO, | |
801 | }, | |
802 | .size = 0, | |
803 | .read = show_inquiry, | |
804 | }; | |
805 | ||
1da177e4 | 806 | static ssize_t |
b3ae8780 HR |
807 | show_iostat_counterbits(struct device *dev, struct device_attribute *attr, |
808 | char *buf) | |
1da177e4 LT |
809 | { |
810 | return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); | |
811 | } | |
812 | ||
813 | static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); | |
814 | ||
815 | #define show_sdev_iostat(field) \ | |
816 | static ssize_t \ | |
ee959b00 TJ |
817 | show_iostat_##field(struct device *dev, struct device_attribute *attr, \ |
818 | char *buf) \ | |
1da177e4 LT |
819 | { \ |
820 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
821 | unsigned long long count = atomic_read(&sdev->field); \ | |
822 | return snprintf(buf, 20, "0x%llx\n", count); \ | |
823 | } \ | |
824 | static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) | |
825 | ||
826 | show_sdev_iostat(iorequest_cnt); | |
827 | show_sdev_iostat(iodone_cnt); | |
828 | show_sdev_iostat(ioerr_cnt); | |
829 | ||
d7b8bcb0 MT |
830 | static ssize_t |
831 | sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf) | |
832 | { | |
833 | struct scsi_device *sdev; | |
834 | sdev = to_scsi_device(dev); | |
835 | return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type); | |
836 | } | |
837 | static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL); | |
1da177e4 | 838 | |
a341cd0f JG |
839 | #define DECLARE_EVT_SHOW(name, Cap_name) \ |
840 | static ssize_t \ | |
841 | sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \ | |
ee959b00 | 842 | char *buf) \ |
a341cd0f JG |
843 | { \ |
844 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
845 | int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\ | |
846 | return snprintf(buf, 20, "%d\n", val); \ | |
847 | } | |
848 | ||
849 | #define DECLARE_EVT_STORE(name, Cap_name) \ | |
850 | static ssize_t \ | |
ee959b00 | 851 | sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\ |
a341cd0f JG |
852 | const char *buf, size_t count) \ |
853 | { \ | |
854 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
855 | int val = simple_strtoul(buf, NULL, 0); \ | |
856 | if (val == 0) \ | |
857 | clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
858 | else if (val == 1) \ | |
859 | set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
860 | else \ | |
861 | return -EINVAL; \ | |
862 | return count; \ | |
863 | } | |
864 | ||
865 | #define DECLARE_EVT(name, Cap_name) \ | |
866 | DECLARE_EVT_SHOW(name, Cap_name) \ | |
867 | DECLARE_EVT_STORE(name, Cap_name) \ | |
868 | static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \ | |
869 | sdev_store_evt_##name); | |
870 | #define REF_EVT(name) &dev_attr_evt_##name.attr | |
871 | ||
872 | DECLARE_EVT(media_change, MEDIA_CHANGE) | |
279afdfe EM |
873 | DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED) |
874 | DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED) | |
875 | DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED) | |
876 | DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED) | |
877 | DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED) | |
a341cd0f | 878 | |
ee959b00 | 879 | static ssize_t |
276b20d0 HR |
880 | sdev_store_queue_depth(struct device *dev, struct device_attribute *attr, |
881 | const char *buf, size_t count) | |
1da177e4 LT |
882 | { |
883 | int depth, retval; | |
884 | struct scsi_device *sdev = to_scsi_device(dev); | |
885 | struct scsi_host_template *sht = sdev->host->hostt; | |
886 | ||
887 | if (!sht->change_queue_depth) | |
888 | return -EINVAL; | |
889 | ||
890 | depth = simple_strtoul(buf, NULL, 0); | |
891 | ||
1278dd68 | 892 | if (depth < 1 || depth > sdev->host->can_queue) |
1da177e4 LT |
893 | return -EINVAL; |
894 | ||
db5ed4df | 895 | retval = sht->change_queue_depth(sdev, depth); |
1da177e4 LT |
896 | if (retval < 0) |
897 | return retval; | |
898 | ||
4a84067d VD |
899 | sdev->max_queue_depth = sdev->queue_depth; |
900 | ||
1da177e4 LT |
901 | return count; |
902 | } | |
276b20d0 | 903 | sdev_show_function(queue_depth, "%d\n"); |
1da177e4 | 904 | |
276b20d0 HR |
905 | static DEVICE_ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, |
906 | sdev_store_queue_depth); | |
1da177e4 | 907 | |
248d4fe9 HR |
908 | static ssize_t |
909 | sdev_show_wwid(struct device *dev, struct device_attribute *attr, | |
910 | char *buf) | |
911 | { | |
912 | struct scsi_device *sdev = to_scsi_device(dev); | |
913 | ssize_t count; | |
914 | ||
915 | count = scsi_vpd_lun_id(sdev, buf, PAGE_SIZE); | |
916 | if (count > 0) { | |
917 | buf[count] = '\n'; | |
918 | count++; | |
919 | } | |
920 | return count; | |
921 | } | |
922 | static DEVICE_ATTR(wwid, S_IRUGO, sdev_show_wwid, NULL); | |
923 | ||
41f95dd2 HR |
924 | #ifdef CONFIG_SCSI_DH |
925 | static ssize_t | |
926 | sdev_show_dh_state(struct device *dev, struct device_attribute *attr, | |
927 | char *buf) | |
928 | { | |
929 | struct scsi_device *sdev = to_scsi_device(dev); | |
930 | ||
931 | if (!sdev->handler) | |
932 | return snprintf(buf, 20, "detached\n"); | |
933 | ||
934 | return snprintf(buf, 20, "%s\n", sdev->handler->name); | |
935 | } | |
936 | ||
937 | static ssize_t | |
938 | sdev_store_dh_state(struct device *dev, struct device_attribute *attr, | |
939 | const char *buf, size_t count) | |
940 | { | |
941 | struct scsi_device *sdev = to_scsi_device(dev); | |
942 | int err = -EINVAL; | |
943 | ||
944 | if (sdev->sdev_state == SDEV_CANCEL || | |
945 | sdev->sdev_state == SDEV_DEL) | |
946 | return -ENODEV; | |
947 | ||
948 | if (!sdev->handler) { | |
949 | /* | |
950 | * Attach to a device handler | |
951 | */ | |
952 | err = scsi_dh_attach(sdev->request_queue, buf); | |
953 | } else if (!strncmp(buf, "activate", 8)) { | |
954 | /* | |
955 | * Activate a device handler | |
956 | */ | |
957 | if (sdev->handler->activate) | |
958 | err = sdev->handler->activate(sdev, NULL, NULL); | |
959 | else | |
960 | err = 0; | |
961 | } else if (!strncmp(buf, "detach", 6)) { | |
962 | /* | |
963 | * Detach from a device handler | |
964 | */ | |
965 | sdev_printk(KERN_WARNING, sdev, | |
966 | "can't detach handler %s.\n", | |
967 | sdev->handler->name); | |
968 | err = -EINVAL; | |
969 | } | |
970 | ||
971 | return err < 0 ? err : count; | |
972 | } | |
973 | ||
974 | static DEVICE_ATTR(dh_state, S_IRUGO | S_IWUSR, sdev_show_dh_state, | |
975 | sdev_store_dh_state); | |
976 | #endif | |
977 | ||
4a84067d VD |
978 | static ssize_t |
979 | sdev_show_queue_ramp_up_period(struct device *dev, | |
980 | struct device_attribute *attr, | |
981 | char *buf) | |
982 | { | |
983 | struct scsi_device *sdev; | |
984 | sdev = to_scsi_device(dev); | |
985 | return snprintf(buf, 20, "%u\n", | |
986 | jiffies_to_msecs(sdev->queue_ramp_up_period)); | |
987 | } | |
988 | ||
989 | static ssize_t | |
990 | sdev_store_queue_ramp_up_period(struct device *dev, | |
991 | struct device_attribute *attr, | |
992 | const char *buf, size_t count) | |
993 | { | |
994 | struct scsi_device *sdev = to_scsi_device(dev); | |
f7c65af5 | 995 | unsigned int period; |
4a84067d | 996 | |
f7c65af5 | 997 | if (kstrtouint(buf, 10, &period)) |
4a84067d VD |
998 | return -EINVAL; |
999 | ||
1000 | sdev->queue_ramp_up_period = msecs_to_jiffies(period); | |
5cb9b40d | 1001 | return count; |
4a84067d VD |
1002 | } |
1003 | ||
276b20d0 HR |
1004 | static DEVICE_ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR, |
1005 | sdev_show_queue_ramp_up_period, | |
1006 | sdev_store_queue_ramp_up_period); | |
4a84067d | 1007 | |
276b20d0 HR |
1008 | static umode_t scsi_sdev_attr_is_visible(struct kobject *kobj, |
1009 | struct attribute *attr, int i) | |
1da177e4 | 1010 | { |
276b20d0 | 1011 | struct device *dev = container_of(kobj, struct device, kobj); |
1da177e4 | 1012 | struct scsi_device *sdev = to_scsi_device(dev); |
1da177e4 | 1013 | |
1da177e4 | 1014 | |
276b20d0 HR |
1015 | if (attr == &dev_attr_queue_depth.attr && |
1016 | !sdev->host->hostt->change_queue_depth) | |
1017 | return S_IRUGO; | |
1da177e4 | 1018 | |
276b20d0 HR |
1019 | if (attr == &dev_attr_queue_ramp_up_period.attr && |
1020 | !sdev->host->hostt->change_queue_depth) | |
1021 | return 0; | |
1da177e4 | 1022 | |
276b20d0 | 1023 | return attr->mode; |
1da177e4 LT |
1024 | } |
1025 | ||
276b20d0 HR |
1026 | /* Default template for device attributes. May NOT be modified */ |
1027 | static struct attribute *scsi_sdev_attrs[] = { | |
1028 | &dev_attr_device_blocked.attr, | |
1029 | &dev_attr_type.attr, | |
1030 | &dev_attr_scsi_level.attr, | |
1031 | &dev_attr_device_busy.attr, | |
1032 | &dev_attr_vendor.attr, | |
1033 | &dev_attr_model.attr, | |
1034 | &dev_attr_rev.attr, | |
1035 | &dev_attr_rescan.attr, | |
1036 | &dev_attr_delete.attr, | |
1037 | &dev_attr_state.attr, | |
1038 | &dev_attr_timeout.attr, | |
1039 | &dev_attr_eh_timeout.attr, | |
1040 | &dev_attr_iocounterbits.attr, | |
1041 | &dev_attr_iorequest_cnt.attr, | |
1042 | &dev_attr_iodone_cnt.attr, | |
1043 | &dev_attr_ioerr_cnt.attr, | |
1044 | &dev_attr_modalias.attr, | |
1045 | &dev_attr_queue_depth.attr, | |
1046 | &dev_attr_queue_type.attr, | |
248d4fe9 | 1047 | &dev_attr_wwid.attr, |
41f95dd2 HR |
1048 | #ifdef CONFIG_SCSI_DH |
1049 | &dev_attr_dh_state.attr, | |
1050 | #endif | |
276b20d0 HR |
1051 | &dev_attr_queue_ramp_up_period.attr, |
1052 | REF_EVT(media_change), | |
1053 | REF_EVT(inquiry_change_reported), | |
1054 | REF_EVT(capacity_change_reported), | |
1055 | REF_EVT(soft_threshold_reached), | |
1056 | REF_EVT(mode_parameter_change_reported), | |
1057 | REF_EVT(lun_change_reported), | |
1058 | NULL | |
1059 | }; | |
1060 | ||
b3ae8780 HR |
1061 | static struct bin_attribute *scsi_sdev_bin_attrs[] = { |
1062 | &dev_attr_vpd_pg83, | |
1063 | &dev_attr_vpd_pg80, | |
92e6246c | 1064 | &dev_attr_inquiry, |
b3ae8780 HR |
1065 | NULL |
1066 | }; | |
276b20d0 HR |
1067 | static struct attribute_group scsi_sdev_attr_group = { |
1068 | .attrs = scsi_sdev_attrs, | |
b3ae8780 | 1069 | .bin_attrs = scsi_sdev_bin_attrs, |
276b20d0 HR |
1070 | .is_visible = scsi_sdev_attr_is_visible, |
1071 | }; | |
1072 | ||
1073 | static const struct attribute_group *scsi_sdev_attr_groups[] = { | |
1074 | &scsi_sdev_attr_group, | |
1075 | NULL | |
1076 | }; | |
1077 | ||
643eb2d9 JB |
1078 | static int scsi_target_add(struct scsi_target *starget) |
1079 | { | |
1080 | int error; | |
1081 | ||
1082 | if (starget->state != STARGET_CREATED) | |
1083 | return 0; | |
1084 | ||
1085 | error = device_add(&starget->dev); | |
1086 | if (error) { | |
1087 | dev_err(&starget->dev, "target device_add failed, error %d\n", error); | |
643eb2d9 JB |
1088 | return error; |
1089 | } | |
1090 | transport_add_device(&starget->dev); | |
1091 | starget->state = STARGET_RUNNING; | |
1092 | ||
bc4f2401 AS |
1093 | pm_runtime_set_active(&starget->dev); |
1094 | pm_runtime_enable(&starget->dev); | |
1095 | device_enable_async_suspend(&starget->dev); | |
1096 | ||
643eb2d9 JB |
1097 | return 0; |
1098 | } | |
1099 | ||
1da177e4 LT |
1100 | /** |
1101 | * scsi_sysfs_add_sdev - add scsi device to sysfs | |
1102 | * @sdev: scsi_device to add | |
1103 | * | |
1104 | * Return value: | |
1105 | * 0 on Success / non-zero on Failure | |
1106 | **/ | |
1107 | int scsi_sysfs_add_sdev(struct scsi_device *sdev) | |
1108 | { | |
1109 | int error, i; | |
80ed71ce | 1110 | struct request_queue *rq = sdev->request_queue; |
643eb2d9 | 1111 | struct scsi_target *starget = sdev->sdev_target; |
1da177e4 | 1112 | |
ee37e09d AS |
1113 | error = scsi_device_set_state(sdev, SDEV_RUNNING); |
1114 | if (error) | |
1da177e4 LT |
1115 | return error; |
1116 | ||
643eb2d9 JB |
1117 | error = scsi_target_add(starget); |
1118 | if (error) | |
1119 | return error; | |
1120 | ||
1121 | transport_configure_device(&starget->dev); | |
bc4f2401 | 1122 | |
4cb077d9 | 1123 | device_enable_async_suspend(&sdev->sdev_gendev); |
bc4f2401 AS |
1124 | scsi_autopm_get_target(starget); |
1125 | pm_runtime_set_active(&sdev->sdev_gendev); | |
1126 | pm_runtime_forbid(&sdev->sdev_gendev); | |
1127 | pm_runtime_enable(&sdev->sdev_gendev); | |
1128 | scsi_autopm_put_target(starget); | |
1129 | ||
bc4f2401 AS |
1130 | scsi_autopm_get_device(sdev); |
1131 | ||
1da177e4 LT |
1132 | error = device_add(&sdev->sdev_gendev); |
1133 | if (error) { | |
73d8c34f AS |
1134 | sdev_printk(KERN_INFO, sdev, |
1135 | "failed to add device: %d\n", error); | |
ee37e09d | 1136 | return error; |
1da177e4 | 1137 | } |
086b91d0 CH |
1138 | |
1139 | error = scsi_dh_add_device(sdev); | |
221255ae HR |
1140 | if (error) |
1141 | /* | |
1142 | * device_handler is optional, so any error can be ignored | |
1143 | */ | |
086b91d0 CH |
1144 | sdev_printk(KERN_INFO, sdev, |
1145 | "failed to add device handler: %d\n", error); | |
086b91d0 | 1146 | |
4cb077d9 | 1147 | device_enable_async_suspend(&sdev->sdev_dev); |
ee959b00 | 1148 | error = device_add(&sdev->sdev_dev); |
1da177e4 | 1149 | if (error) { |
73d8c34f AS |
1150 | sdev_printk(KERN_INFO, sdev, |
1151 | "failed to add class device: %d\n", error); | |
086b91d0 | 1152 | scsi_dh_remove_device(sdev); |
860dc736 | 1153 | device_del(&sdev->sdev_gendev); |
ee37e09d | 1154 | return error; |
1da177e4 | 1155 | } |
860dc736 JB |
1156 | transport_add_device(&sdev->sdev_gendev); |
1157 | sdev->is_visible = 1; | |
1da177e4 | 1158 | |
97f46ae4 | 1159 | error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL); |
80ed71ce JB |
1160 | |
1161 | if (error) | |
860dc736 JB |
1162 | /* we're treating error on bsg register as non-fatal, |
1163 | * so pretend nothing went wrong */ | |
80ed71ce JB |
1164 | sdev_printk(KERN_INFO, sdev, |
1165 | "Failed to register bsg queue, errno=%d\n", error); | |
1166 | ||
bfd12944 | 1167 | /* add additional host specific attributes */ |
1da177e4 LT |
1168 | if (sdev->host->hostt->sdev_attrs) { |
1169 | for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { | |
bfd12944 | 1170 | error = device_create_file(&sdev->sdev_gendev, |
1da177e4 | 1171 | sdev->host->hostt->sdev_attrs[i]); |
860dc736 | 1172 | if (error) |
ee37e09d | 1173 | return error; |
1da177e4 LT |
1174 | } |
1175 | } | |
1da177e4 | 1176 | |
6fe8c1db | 1177 | scsi_autopm_put_device(sdev); |
1da177e4 LT |
1178 | return error; |
1179 | } | |
1180 | ||
903f4fed | 1181 | void __scsi_remove_device(struct scsi_device *sdev) |
1da177e4 | 1182 | { |
df133c21 JB |
1183 | struct device *dev = &sdev->sdev_gendev; |
1184 | ||
be821fd8 VK |
1185 | /* |
1186 | * This cleanup path is not reentrant and while it is impossible | |
1187 | * to get a new reference with scsi_device_get() someone can still | |
1188 | * hold a previously acquired one. | |
1189 | */ | |
1190 | if (sdev->sdev_state == SDEV_DEL) | |
1191 | return; | |
1192 | ||
860dc736 JB |
1193 | if (sdev->is_visible) { |
1194 | if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0) | |
1195 | return; | |
1da177e4 | 1196 | |
860dc736 JB |
1197 | bsg_unregister_queue(sdev->request_queue); |
1198 | device_unregister(&sdev->sdev_dev); | |
1199 | transport_remove_device(dev); | |
086b91d0 | 1200 | scsi_dh_remove_device(sdev); |
e619e6cb BVA |
1201 | device_del(dev); |
1202 | } else | |
1203 | put_device(&sdev->sdev_dev); | |
b485462a BVA |
1204 | |
1205 | /* | |
1206 | * Stop accepting new requests and wait until all queuecommand() and | |
1207 | * scsi_run_queue() invocations have finished before tearing down the | |
1208 | * device. | |
1209 | */ | |
1da177e4 | 1210 | scsi_device_set_state(sdev, SDEV_DEL); |
b485462a BVA |
1211 | blk_cleanup_queue(sdev->request_queue); |
1212 | cancel_work_sync(&sdev->requeue_work); | |
1213 | ||
1da177e4 LT |
1214 | if (sdev->host->hostt->slave_destroy) |
1215 | sdev->host->hostt->slave_destroy(sdev); | |
df133c21 | 1216 | transport_destroy_device(dev); |
86cbfb56 | 1217 | |
e63ed0d7 JB |
1218 | /* |
1219 | * Paired with the kref_get() in scsi_sysfs_initialize(). We have | |
1220 | * remoed sysfs visibility from the device, so make the target | |
1221 | * invisible if this was the last device underneath it. | |
1222 | */ | |
1223 | scsi_target_reap(scsi_target(sdev)); | |
1224 | ||
df133c21 | 1225 | put_device(dev); |
903f4fed AS |
1226 | } |
1227 | ||
1228 | /** | |
1229 | * scsi_remove_device - unregister a device from the scsi bus | |
1230 | * @sdev: scsi_device to unregister | |
1231 | **/ | |
1232 | void scsi_remove_device(struct scsi_device *sdev) | |
1233 | { | |
54195002 AS |
1234 | struct Scsi_Host *shost = sdev->host; |
1235 | ||
0b950672 | 1236 | mutex_lock(&shost->scan_mutex); |
903f4fed | 1237 | __scsi_remove_device(sdev); |
0b950672 | 1238 | mutex_unlock(&shost->scan_mutex); |
1da177e4 LT |
1239 | } |
1240 | EXPORT_SYMBOL(scsi_remove_device); | |
1241 | ||
44818efb | 1242 | static void __scsi_remove_target(struct scsi_target *starget) |
1da177e4 LT |
1243 | { |
1244 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
1245 | unsigned long flags; | |
a64358db | 1246 | struct scsi_device *sdev; |
1da177e4 LT |
1247 | |
1248 | spin_lock_irqsave(shost->host_lock, flags); | |
a64358db AS |
1249 | restart: |
1250 | list_for_each_entry(sdev, &shost->__devices, siblings) { | |
1da177e4 | 1251 | if (sdev->channel != starget->channel || |
a64358db | 1252 | sdev->id != starget->id || |
546ae796 | 1253 | scsi_device_get(sdev)) |
1da177e4 LT |
1254 | continue; |
1255 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1256 | scsi_remove_device(sdev); | |
546ae796 | 1257 | scsi_device_put(sdev); |
1da177e4 | 1258 | spin_lock_irqsave(shost->host_lock, flags); |
a64358db | 1259 | goto restart; |
1da177e4 LT |
1260 | } |
1261 | spin_unlock_irqrestore(shost->host_lock, flags); | |
20b1e674 | 1262 | } |
1263 | ||
1da177e4 LT |
1264 | /** |
1265 | * scsi_remove_target - try to remove a target and all its devices | |
1266 | * @dev: generic starget or parent of generic stargets to be removed | |
1267 | * | |
1268 | * Note: This is slightly racy. It is possible that if the user | |
1269 | * requests the addition of another device then the target won't be | |
1270 | * removed. | |
1271 | */ | |
1272 | void scsi_remove_target(struct device *dev) | |
1273 | { | |
3b661a92 | 1274 | struct Scsi_Host *shost = dev_to_shost(dev->parent); |
40998193 | 1275 | struct scsi_target *starget; |
3b661a92 DW |
1276 | unsigned long flags; |
1277 | ||
40998193 | 1278 | restart: |
3b661a92 DW |
1279 | spin_lock_irqsave(shost->host_lock, flags); |
1280 | list_for_each_entry(starget, &shost->__targets, siblings) { | |
1281 | if (starget->state == STARGET_DEL) | |
1282 | continue; | |
1283 | if (starget->dev.parent == dev || &starget->dev == dev) { | |
e63ed0d7 | 1284 | kref_get(&starget->reap_ref); |
bc3f02a7 | 1285 | spin_unlock_irqrestore(shost->host_lock, flags); |
bc3f02a7 | 1286 | __scsi_remove_target(starget); |
40998193 CH |
1287 | scsi_target_reap(starget); |
1288 | goto restart; | |
3b661a92 | 1289 | } |
1da177e4 | 1290 | } |
3b661a92 | 1291 | spin_unlock_irqrestore(shost->host_lock, flags); |
1da177e4 LT |
1292 | } |
1293 | EXPORT_SYMBOL(scsi_remove_target); | |
1294 | ||
1295 | int scsi_register_driver(struct device_driver *drv) | |
1296 | { | |
1297 | drv->bus = &scsi_bus_type; | |
1298 | ||
1299 | return driver_register(drv); | |
1300 | } | |
1301 | EXPORT_SYMBOL(scsi_register_driver); | |
1302 | ||
1303 | int scsi_register_interface(struct class_interface *intf) | |
1304 | { | |
1305 | intf->class = &sdev_class; | |
1306 | ||
1307 | return class_interface_register(intf); | |
1308 | } | |
1309 | EXPORT_SYMBOL(scsi_register_interface); | |
1310 | ||
1da177e4 LT |
1311 | /** |
1312 | * scsi_sysfs_add_host - add scsi host to subsystem | |
1313 | * @shost: scsi host struct to add to subsystem | |
1da177e4 LT |
1314 | **/ |
1315 | int scsi_sysfs_add_host(struct Scsi_Host *shost) | |
1316 | { | |
1317 | int error, i; | |
1318 | ||
f7120a4f | 1319 | /* add host specific attributes */ |
1da177e4 LT |
1320 | if (shost->hostt->shost_attrs) { |
1321 | for (i = 0; shost->hostt->shost_attrs[i]; i++) { | |
ee959b00 | 1322 | error = device_create_file(&shost->shost_dev, |
f7120a4f | 1323 | shost->hostt->shost_attrs[i]); |
1da177e4 LT |
1324 | if (error) |
1325 | return error; | |
1326 | } | |
1327 | } | |
1328 | ||
1329 | transport_register_device(&shost->shost_gendev); | |
d52b3815 | 1330 | transport_configure_device(&shost->shost_gendev); |
1da177e4 LT |
1331 | return 0; |
1332 | } | |
1333 | ||
bfd12944 KS |
1334 | static struct device_type scsi_dev_type = { |
1335 | .name = "scsi_device", | |
1336 | .release = scsi_device_dev_release, | |
1337 | .groups = scsi_sdev_attr_groups, | |
1338 | }; | |
1339 | ||
1da177e4 LT |
1340 | void scsi_sysfs_device_initialize(struct scsi_device *sdev) |
1341 | { | |
1342 | unsigned long flags; | |
1343 | struct Scsi_Host *shost = sdev->host; | |
1344 | struct scsi_target *starget = sdev->sdev_target; | |
1345 | ||
1346 | device_initialize(&sdev->sdev_gendev); | |
1347 | sdev->sdev_gendev.bus = &scsi_bus_type; | |
bfd12944 | 1348 | sdev->sdev_gendev.type = &scsi_dev_type; |
9cb78c16 | 1349 | dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%llu", |
71610f55 KS |
1350 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); |
1351 | ||
ee959b00 | 1352 | device_initialize(&sdev->sdev_dev); |
37e6ba00 | 1353 | sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev); |
ee959b00 | 1354 | sdev->sdev_dev.class = &sdev_class; |
9cb78c16 | 1355 | dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%llu", |
71610f55 | 1356 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); |
50c4e964 AS |
1357 | /* |
1358 | * Get a default scsi_level from the target (derived from sibling | |
1359 | * devices). This is the best we can do for guessing how to set | |
1360 | * sdev->lun_in_cdb for the initial INQUIRY command. For LUN 0 the | |
1361 | * setting doesn't matter, because all the bits are zero anyway. | |
1362 | * But it does matter for higher LUNs. | |
1363 | */ | |
7c9d6f16 | 1364 | sdev->scsi_level = starget->scsi_level; |
50c4e964 AS |
1365 | if (sdev->scsi_level <= SCSI_2 && |
1366 | sdev->scsi_level != SCSI_UNKNOWN && | |
1367 | !shost->no_scsi2_lun_in_cdb) | |
1368 | sdev->lun_in_cdb = 1; | |
1369 | ||
1da177e4 LT |
1370 | transport_setup_device(&sdev->sdev_gendev); |
1371 | spin_lock_irqsave(shost->host_lock, flags); | |
1372 | list_add_tail(&sdev->same_target_siblings, &starget->devices); | |
1373 | list_add_tail(&sdev->siblings, &shost->__devices); | |
1374 | spin_unlock_irqrestore(shost->host_lock, flags); | |
e63ed0d7 JB |
1375 | /* |
1376 | * device can now only be removed via __scsi_remove_device() so hold | |
1377 | * the target. Target will be held in CREATED state until something | |
1378 | * beneath it becomes visible (in which case it moves to RUNNING) | |
1379 | */ | |
1380 | kref_get(&starget->reap_ref); | |
1da177e4 LT |
1381 | } |
1382 | ||
1383 | int scsi_is_sdev_device(const struct device *dev) | |
1384 | { | |
13ba9bcb | 1385 | return dev->type == &scsi_dev_type; |
1da177e4 LT |
1386 | } |
1387 | EXPORT_SYMBOL(scsi_is_sdev_device); | |
1388 | ||
1389 | /* A blank transport template that is used in drivers that don't | |
1390 | * yet implement Transport Attributes */ | |
1391 | struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |