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> | |
20 | #include <scsi/scsi_transport.h> | |
44818efb | 21 | #include <scsi/scsi_driver.h> |
1da177e4 LT |
22 | |
23 | #include "scsi_priv.h" | |
24 | #include "scsi_logging.h" | |
25 | ||
b0ed4336 HR |
26 | static struct device_type scsi_dev_type; |
27 | ||
0ad78200 | 28 | static const struct { |
1da177e4 LT |
29 | enum scsi_device_state value; |
30 | char *name; | |
31 | } sdev_states[] = { | |
32 | { SDEV_CREATED, "created" }, | |
33 | { SDEV_RUNNING, "running" }, | |
34 | { SDEV_CANCEL, "cancel" }, | |
35 | { SDEV_DEL, "deleted" }, | |
36 | { SDEV_QUIESCE, "quiesce" }, | |
37 | { SDEV_OFFLINE, "offline" }, | |
1b8d2620 | 38 | { SDEV_TRANSPORT_OFFLINE, "transport-offline" }, |
1da177e4 | 39 | { SDEV_BLOCK, "blocked" }, |
6f4267e3 | 40 | { SDEV_CREATED_BLOCK, "created-blocked" }, |
1da177e4 LT |
41 | }; |
42 | ||
43 | const char *scsi_device_state_name(enum scsi_device_state state) | |
44 | { | |
45 | int i; | |
46 | char *name = NULL; | |
47 | ||
6391a113 | 48 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
49 | if (sdev_states[i].value == state) { |
50 | name = sdev_states[i].name; | |
51 | break; | |
52 | } | |
53 | } | |
54 | return name; | |
55 | } | |
56 | ||
0ad78200 | 57 | static const struct { |
d3301874 MA |
58 | enum scsi_host_state value; |
59 | char *name; | |
60 | } shost_states[] = { | |
61 | { SHOST_CREATED, "created" }, | |
62 | { SHOST_RUNNING, "running" }, | |
63 | { SHOST_CANCEL, "cancel" }, | |
64 | { SHOST_DEL, "deleted" }, | |
65 | { SHOST_RECOVERY, "recovery" }, | |
939647ee JB |
66 | { SHOST_CANCEL_RECOVERY, "cancel/recovery" }, |
67 | { SHOST_DEL_RECOVERY, "deleted/recovery", }, | |
d3301874 MA |
68 | }; |
69 | const char *scsi_host_state_name(enum scsi_host_state state) | |
70 | { | |
71 | int i; | |
72 | char *name = NULL; | |
73 | ||
6391a113 | 74 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
75 | if (shost_states[i].value == state) { |
76 | name = shost_states[i].name; | |
77 | break; | |
78 | } | |
79 | } | |
80 | return name; | |
81 | } | |
82 | ||
1da177e4 LT |
83 | static int check_set(unsigned int *val, char *src) |
84 | { | |
85 | char *last; | |
86 | ||
87 | if (strncmp(src, "-", 20) == 0) { | |
88 | *val = SCAN_WILD_CARD; | |
89 | } else { | |
90 | /* | |
91 | * Doesn't check for int overflow | |
92 | */ | |
93 | *val = simple_strtoul(src, &last, 0); | |
94 | if (*last != '\0') | |
95 | return 1; | |
96 | } | |
97 | return 0; | |
98 | } | |
99 | ||
100 | static int scsi_scan(struct Scsi_Host *shost, const char *str) | |
101 | { | |
102 | char s1[15], s2[15], s3[15], junk; | |
103 | unsigned int channel, id, lun; | |
104 | int res; | |
105 | ||
106 | res = sscanf(str, "%10s %10s %10s %c", s1, s2, s3, &junk); | |
107 | if (res != 3) | |
108 | return -EINVAL; | |
109 | if (check_set(&channel, s1)) | |
110 | return -EINVAL; | |
111 | if (check_set(&id, s2)) | |
112 | return -EINVAL; | |
113 | if (check_set(&lun, s3)) | |
114 | return -EINVAL; | |
e02f3f59 CH |
115 | if (shost->transportt->user_scan) |
116 | res = shost->transportt->user_scan(shost, channel, id, lun); | |
117 | else | |
118 | res = scsi_scan_host_selected(shost, channel, id, lun, 1); | |
1da177e4 LT |
119 | return res; |
120 | } | |
121 | ||
122 | /* | |
123 | * shost_show_function: macro to create an attr function that can be used to | |
124 | * show a non-bit field. | |
125 | */ | |
126 | #define shost_show_function(name, field, format_string) \ | |
127 | static ssize_t \ | |
ee959b00 TJ |
128 | show_##name (struct device *dev, struct device_attribute *attr, \ |
129 | char *buf) \ | |
1da177e4 | 130 | { \ |
ee959b00 | 131 | struct Scsi_Host *shost = class_to_shost(dev); \ |
1da177e4 LT |
132 | return snprintf (buf, 20, format_string, shost->field); \ |
133 | } | |
134 | ||
135 | /* | |
136 | * shost_rd_attr: macro to create a function and attribute variable for a | |
137 | * read only field. | |
138 | */ | |
139 | #define shost_rd_attr2(name, field, format_string) \ | |
140 | shost_show_function(name, field, format_string) \ | |
ee959b00 | 141 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); |
1da177e4 LT |
142 | |
143 | #define shost_rd_attr(field, format_string) \ | |
144 | shost_rd_attr2(field, field, format_string) | |
145 | ||
146 | /* | |
147 | * Create the actual show/store functions and data structures. | |
148 | */ | |
149 | ||
ee959b00 TJ |
150 | static ssize_t |
151 | store_scan(struct device *dev, struct device_attribute *attr, | |
152 | const char *buf, size_t count) | |
1da177e4 | 153 | { |
ee959b00 | 154 | struct Scsi_Host *shost = class_to_shost(dev); |
1da177e4 LT |
155 | int res; |
156 | ||
157 | res = scsi_scan(shost, buf); | |
158 | if (res == 0) | |
159 | res = count; | |
160 | return res; | |
161 | }; | |
ee959b00 | 162 | static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); |
1da177e4 | 163 | |
d3301874 | 164 | static ssize_t |
ee959b00 TJ |
165 | store_shost_state(struct device *dev, struct device_attribute *attr, |
166 | const char *buf, size_t count) | |
d3301874 MA |
167 | { |
168 | int i; | |
ee959b00 | 169 | struct Scsi_Host *shost = class_to_shost(dev); |
d3301874 MA |
170 | enum scsi_host_state state = 0; |
171 | ||
6391a113 | 172 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
173 | const int len = strlen(shost_states[i].name); |
174 | if (strncmp(shost_states[i].name, buf, len) == 0 && | |
175 | buf[len] == '\n') { | |
176 | state = shost_states[i].value; | |
177 | break; | |
178 | } | |
179 | } | |
180 | if (!state) | |
181 | return -EINVAL; | |
182 | ||
183 | if (scsi_host_set_state(shost, state)) | |
184 | return -EINVAL; | |
185 | return count; | |
186 | } | |
187 | ||
188 | static ssize_t | |
ee959b00 | 189 | show_shost_state(struct device *dev, struct device_attribute *attr, char *buf) |
d3301874 | 190 | { |
ee959b00 | 191 | struct Scsi_Host *shost = class_to_shost(dev); |
d3301874 MA |
192 | const char *name = scsi_host_state_name(shost->shost_state); |
193 | ||
194 | if (!name) | |
195 | return -EINVAL; | |
196 | ||
197 | return snprintf(buf, 20, "%s\n", name); | |
198 | } | |
199 | ||
ee959b00 TJ |
200 | /* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */ |
201 | struct device_attribute dev_attr_hstate = | |
202 | __ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state); | |
d3301874 | 203 | |
5dc2b89e FT |
204 | static ssize_t |
205 | show_shost_mode(unsigned int mode, char *buf) | |
206 | { | |
207 | ssize_t len = 0; | |
208 | ||
209 | if (mode & MODE_INITIATOR) | |
210 | len = sprintf(buf, "%s", "Initiator"); | |
211 | ||
212 | if (mode & MODE_TARGET) | |
213 | len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target"); | |
214 | ||
215 | len += sprintf(buf + len, "\n"); | |
216 | ||
217 | return len; | |
218 | } | |
219 | ||
ee959b00 TJ |
220 | static ssize_t |
221 | show_shost_supported_mode(struct device *dev, struct device_attribute *attr, | |
222 | char *buf) | |
5dc2b89e | 223 | { |
ee959b00 | 224 | struct Scsi_Host *shost = class_to_shost(dev); |
7a39ac3f | 225 | unsigned int supported_mode = shost->hostt->supported_mode; |
5dc2b89e | 226 | |
7a39ac3f JB |
227 | if (supported_mode == MODE_UNKNOWN) |
228 | /* by default this should be initiator */ | |
229 | supported_mode = MODE_INITIATOR; | |
230 | ||
231 | return show_shost_mode(supported_mode, buf); | |
5dc2b89e FT |
232 | } |
233 | ||
ee959b00 | 234 | static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL); |
5dc2b89e | 235 | |
ee959b00 TJ |
236 | static ssize_t |
237 | show_shost_active_mode(struct device *dev, | |
238 | struct device_attribute *attr, char *buf) | |
5dc2b89e | 239 | { |
ee959b00 | 240 | struct Scsi_Host *shost = class_to_shost(dev); |
5dc2b89e FT |
241 | |
242 | if (shost->active_mode == MODE_UNKNOWN) | |
243 | return snprintf(buf, 20, "unknown\n"); | |
244 | else | |
245 | return show_shost_mode(shost->active_mode, buf); | |
246 | } | |
247 | ||
ee959b00 | 248 | static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL); |
5dc2b89e | 249 | |
072f19b4 | 250 | static int check_reset_type(const char *str) |
29443691 | 251 | { |
072f19b4 | 252 | if (sysfs_streq(str, "adapter")) |
29443691 | 253 | return SCSI_ADAPTER_RESET; |
072f19b4 | 254 | else if (sysfs_streq(str, "firmware")) |
29443691 VC |
255 | return SCSI_FIRMWARE_RESET; |
256 | else | |
257 | return 0; | |
258 | } | |
259 | ||
260 | static ssize_t | |
261 | store_host_reset(struct device *dev, struct device_attribute *attr, | |
262 | const char *buf, size_t count) | |
263 | { | |
264 | struct Scsi_Host *shost = class_to_shost(dev); | |
265 | struct scsi_host_template *sht = shost->hostt; | |
266 | int ret = -EINVAL; | |
29443691 VC |
267 | int type; |
268 | ||
072f19b4 | 269 | type = check_reset_type(buf); |
29443691 VC |
270 | if (!type) |
271 | goto exit_store_host_reset; | |
272 | ||
273 | if (sht->host_reset) | |
274 | ret = sht->host_reset(shost, type); | |
275 | ||
276 | exit_store_host_reset: | |
277 | if (ret == 0) | |
278 | ret = count; | |
279 | return ret; | |
280 | } | |
281 | ||
282 | static DEVICE_ATTR(host_reset, S_IWUSR, NULL, store_host_reset); | |
283 | ||
b4562022 HR |
284 | static ssize_t |
285 | show_shost_eh_deadline(struct device *dev, | |
286 | struct device_attribute *attr, char *buf) | |
287 | { | |
288 | struct Scsi_Host *shost = class_to_shost(dev); | |
289 | ||
bb3b621a RM |
290 | if (shost->eh_deadline == -1) |
291 | return snprintf(buf, strlen("off") + 2, "off\n"); | |
292 | return sprintf(buf, "%u\n", shost->eh_deadline / HZ); | |
b4562022 HR |
293 | } |
294 | ||
295 | static ssize_t | |
296 | store_shost_eh_deadline(struct device *dev, struct device_attribute *attr, | |
297 | const char *buf, size_t count) | |
298 | { | |
299 | struct Scsi_Host *shost = class_to_shost(dev); | |
300 | int ret = -EINVAL; | |
bb3b621a | 301 | unsigned long deadline, flags; |
b4562022 | 302 | |
ad469a57 HR |
303 | if (shost->transportt && |
304 | (shost->transportt->eh_strategy_handler || | |
305 | !shost->hostt->eh_host_reset_handler)) | |
b4562022 HR |
306 | return ret; |
307 | ||
bb3b621a RM |
308 | if (!strncmp(buf, "off", strlen("off"))) |
309 | deadline = -1; | |
310 | else { | |
311 | ret = kstrtoul(buf, 10, &deadline); | |
312 | if (ret) | |
313 | return ret; | |
314 | if (deadline * HZ > UINT_MAX) | |
315 | return -EINVAL; | |
316 | } | |
317 | ||
318 | spin_lock_irqsave(shost->host_lock, flags); | |
319 | if (scsi_host_in_recovery(shost)) | |
320 | ret = -EBUSY; | |
321 | else { | |
322 | if (deadline == -1) | |
323 | shost->eh_deadline = -1; | |
324 | else | |
b4562022 | 325 | shost->eh_deadline = deadline * HZ; |
bb3b621a RM |
326 | |
327 | ret = count; | |
b4562022 | 328 | } |
bb3b621a RM |
329 | spin_unlock_irqrestore(shost->host_lock, flags); |
330 | ||
b4562022 HR |
331 | return ret; |
332 | } | |
333 | ||
334 | static DEVICE_ATTR(eh_deadline, S_IRUGO | S_IWUSR, show_shost_eh_deadline, store_shost_eh_deadline); | |
335 | ||
1da177e4 LT |
336 | shost_rd_attr(unique_id, "%u\n"); |
337 | shost_rd_attr(host_busy, "%hu\n"); | |
338 | shost_rd_attr(cmd_per_lun, "%hd\n"); | |
ed632da8 | 339 | shost_rd_attr(can_queue, "%hd\n"); |
1da177e4 | 340 | shost_rd_attr(sg_tablesize, "%hu\n"); |
13f05c8d | 341 | shost_rd_attr(sg_prot_tablesize, "%hu\n"); |
1da177e4 | 342 | shost_rd_attr(unchecked_isa_dma, "%d\n"); |
4469f987 MP |
343 | shost_rd_attr(prot_capabilities, "%u\n"); |
344 | shost_rd_attr(prot_guard_type, "%hd\n"); | |
1da177e4 LT |
345 | shost_rd_attr2(proc_name, hostt->proc_name, "%s\n"); |
346 | ||
f7120a4f HR |
347 | static struct attribute *scsi_sysfs_shost_attrs[] = { |
348 | &dev_attr_unique_id.attr, | |
349 | &dev_attr_host_busy.attr, | |
350 | &dev_attr_cmd_per_lun.attr, | |
351 | &dev_attr_can_queue.attr, | |
352 | &dev_attr_sg_tablesize.attr, | |
13f05c8d | 353 | &dev_attr_sg_prot_tablesize.attr, |
f7120a4f HR |
354 | &dev_attr_unchecked_isa_dma.attr, |
355 | &dev_attr_proc_name.attr, | |
356 | &dev_attr_scan.attr, | |
357 | &dev_attr_hstate.attr, | |
358 | &dev_attr_supported_mode.attr, | |
359 | &dev_attr_active_mode.attr, | |
4469f987 MP |
360 | &dev_attr_prot_capabilities.attr, |
361 | &dev_attr_prot_guard_type.attr, | |
29443691 | 362 | &dev_attr_host_reset.attr, |
b4562022 | 363 | &dev_attr_eh_deadline.attr, |
f7120a4f HR |
364 | NULL |
365 | }; | |
366 | ||
367 | struct attribute_group scsi_shost_attr_group = { | |
368 | .attrs = scsi_sysfs_shost_attrs, | |
369 | }; | |
370 | ||
a4dbd674 | 371 | const struct attribute_group *scsi_sysfs_shost_attr_groups[] = { |
f7120a4f | 372 | &scsi_shost_attr_group, |
1da177e4 LT |
373 | NULL |
374 | }; | |
375 | ||
ee959b00 | 376 | static void scsi_device_cls_release(struct device *class_dev) |
1da177e4 LT |
377 | { |
378 | struct scsi_device *sdev; | |
379 | ||
380 | sdev = class_to_sdev(class_dev); | |
381 | put_device(&sdev->sdev_gendev); | |
382 | } | |
383 | ||
65f27f38 | 384 | static void scsi_device_dev_release_usercontext(struct work_struct *work) |
1da177e4 LT |
385 | { |
386 | struct scsi_device *sdev; | |
387 | struct device *parent; | |
a341cd0f | 388 | struct list_head *this, *tmp; |
1da177e4 LT |
389 | unsigned long flags; |
390 | ||
65f27f38 DH |
391 | sdev = container_of(work, struct scsi_device, ew.work); |
392 | ||
393 | parent = sdev->sdev_gendev.parent; | |
1da177e4 LT |
394 | |
395 | spin_lock_irqsave(sdev->host->host_lock, flags); | |
1da177e4 LT |
396 | list_del(&sdev->siblings); |
397 | list_del(&sdev->same_target_siblings); | |
398 | list_del(&sdev->starved_entry); | |
399 | spin_unlock_irqrestore(sdev->host->host_lock, flags); | |
400 | ||
a341cd0f JG |
401 | cancel_work_sync(&sdev->event_work); |
402 | ||
403 | list_for_each_safe(this, tmp, &sdev->event_list) { | |
404 | struct scsi_event *evt; | |
405 | ||
406 | evt = list_entry(this, struct scsi_event, node); | |
407 | list_del(&evt->node); | |
408 | kfree(evt); | |
409 | } | |
410 | ||
e73e079b | 411 | blk_put_queue(sdev->request_queue); |
86cbfb56 JB |
412 | /* NULL queue means the device can't be used */ |
413 | sdev->request_queue = NULL; | |
1da177e4 | 414 | |
b3ae8780 HR |
415 | kfree(sdev->vpd_pg83); |
416 | kfree(sdev->vpd_pg80); | |
1da177e4 LT |
417 | kfree(sdev->inquiry); |
418 | kfree(sdev); | |
419 | ||
420 | if (parent) | |
421 | put_device(parent); | |
422 | } | |
423 | ||
65110b21 JB |
424 | static void scsi_device_dev_release(struct device *dev) |
425 | { | |
ffedb452 | 426 | struct scsi_device *sdp = to_scsi_device(dev); |
65f27f38 | 427 | execute_in_process_context(scsi_device_dev_release_usercontext, |
ffedb452 | 428 | &sdp->ew); |
65110b21 JB |
429 | } |
430 | ||
52c1da39 | 431 | static struct class sdev_class = { |
1da177e4 | 432 | .name = "scsi_device", |
ee959b00 | 433 | .dev_release = scsi_device_cls_release, |
1da177e4 LT |
434 | }; |
435 | ||
436 | /* all probing is done in the individual ->probe routines */ | |
437 | static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) | |
438 | { | |
b0ed4336 HR |
439 | struct scsi_device *sdp; |
440 | ||
441 | if (dev->type != &scsi_dev_type) | |
442 | return 0; | |
443 | ||
444 | sdp = to_scsi_device(dev); | |
1da177e4 LT |
445 | if (sdp->no_uld_attach) |
446 | return 0; | |
447 | return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; | |
448 | } | |
449 | ||
7eff2e7a | 450 | static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
d7b8bcb0 | 451 | { |
1f42ea7b JB |
452 | struct scsi_device *sdev; |
453 | ||
454 | if (dev->type != &scsi_dev_type) | |
455 | return 0; | |
456 | ||
457 | sdev = to_scsi_device(dev); | |
d7b8bcb0 | 458 | |
7eff2e7a | 459 | add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type); |
d7b8bcb0 MT |
460 | return 0; |
461 | } | |
462 | ||
1da177e4 LT |
463 | struct bus_type scsi_bus_type = { |
464 | .name = "scsi", | |
465 | .match = scsi_bus_match, | |
d7b8bcb0 | 466 | .uevent = scsi_bus_uevent, |
aa338601 | 467 | #ifdef CONFIG_PM |
db5bd1e0 | 468 | .pm = &scsi_bus_pm_ops, |
e6da54d8 | 469 | #endif |
1da177e4 | 470 | }; |
a6a8d9f8 | 471 | EXPORT_SYMBOL_GPL(scsi_bus_type); |
1da177e4 LT |
472 | |
473 | int scsi_sysfs_register(void) | |
474 | { | |
475 | int error; | |
476 | ||
477 | error = bus_register(&scsi_bus_type); | |
478 | if (!error) { | |
479 | error = class_register(&sdev_class); | |
480 | if (error) | |
481 | bus_unregister(&scsi_bus_type); | |
482 | } | |
483 | ||
484 | return error; | |
485 | } | |
486 | ||
487 | void scsi_sysfs_unregister(void) | |
488 | { | |
489 | class_unregister(&sdev_class); | |
490 | bus_unregister(&scsi_bus_type); | |
491 | } | |
492 | ||
493 | /* | |
494 | * sdev_show_function: macro to create an attr function that can be used to | |
495 | * show a non-bit field. | |
496 | */ | |
497 | #define sdev_show_function(field, format_string) \ | |
498 | static ssize_t \ | |
ee959b00 TJ |
499 | sdev_show_##field (struct device *dev, struct device_attribute *attr, \ |
500 | char *buf) \ | |
1da177e4 LT |
501 | { \ |
502 | struct scsi_device *sdev; \ | |
503 | sdev = to_scsi_device(dev); \ | |
504 | return snprintf (buf, 20, format_string, sdev->field); \ | |
505 | } \ | |
506 | ||
507 | /* | |
508 | * sdev_rd_attr: macro to create a function and attribute variable for a | |
509 | * read only field. | |
510 | */ | |
511 | #define sdev_rd_attr(field, format_string) \ | |
512 | sdev_show_function(field, format_string) \ | |
513 | static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); | |
514 | ||
515 | ||
516 | /* | |
160e7f67 | 517 | * sdev_rw_attr: create a function and attribute variable for a |
1da177e4 LT |
518 | * read/write field. |
519 | */ | |
520 | #define sdev_rw_attr(field, format_string) \ | |
521 | sdev_show_function(field, format_string) \ | |
522 | \ | |
523 | static ssize_t \ | |
ee959b00 TJ |
524 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
525 | const char *buf, size_t count) \ | |
1da177e4 LT |
526 | { \ |
527 | struct scsi_device *sdev; \ | |
528 | sdev = to_scsi_device(dev); \ | |
160e7f67 | 529 | sscanf (buf, format_string, &sdev->field); \ |
1da177e4 LT |
530 | return count; \ |
531 | } \ | |
532 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
533 | ||
534 | /* Currently we don't export bit fields, but we might in future, | |
535 | * so leave this code in */ | |
536 | #if 0 | |
537 | /* | |
538 | * sdev_rd_attr: create a function and attribute variable for a | |
539 | * read/write bit field. | |
540 | */ | |
541 | #define sdev_rw_attr_bit(field) \ | |
542 | sdev_show_function(field, "%d\n") \ | |
543 | \ | |
544 | static ssize_t \ | |
ee959b00 TJ |
545 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
546 | const char *buf, size_t count) \ | |
1da177e4 LT |
547 | { \ |
548 | int ret; \ | |
549 | struct scsi_device *sdev; \ | |
550 | ret = scsi_sdev_check_buf_bit(buf); \ | |
551 | if (ret >= 0) { \ | |
552 | sdev = to_scsi_device(dev); \ | |
553 | sdev->field = ret; \ | |
554 | ret = count; \ | |
555 | } \ | |
556 | return ret; \ | |
557 | } \ | |
558 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
559 | ||
560 | /* | |
561 | * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", | |
562 | * else return -EINVAL. | |
563 | */ | |
564 | static int scsi_sdev_check_buf_bit(const char *buf) | |
565 | { | |
566 | if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { | |
567 | if (buf[0] == '1') | |
568 | return 1; | |
569 | else if (buf[0] == '0') | |
570 | return 0; | |
571 | else | |
572 | return -EINVAL; | |
573 | } else | |
574 | return -EINVAL; | |
575 | } | |
576 | #endif | |
577 | /* | |
578 | * Create the actual show/store functions and data structures. | |
579 | */ | |
580 | sdev_rd_attr (device_blocked, "%d\n"); | |
522db3c9 | 581 | sdev_rd_attr (device_busy, "%d\n"); |
1da177e4 LT |
582 | sdev_rd_attr (type, "%d\n"); |
583 | sdev_rd_attr (scsi_level, "%d\n"); | |
584 | sdev_rd_attr (vendor, "%.8s\n"); | |
585 | sdev_rd_attr (model, "%.16s\n"); | |
586 | sdev_rd_attr (rev, "%.4s\n"); | |
587 | ||
242f9dcb JA |
588 | /* |
589 | * TODO: can we make these symlinks to the block layer ones? | |
590 | */ | |
1da177e4 | 591 | static ssize_t |
10523b3b | 592 | sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
593 | { |
594 | struct scsi_device *sdev; | |
595 | sdev = to_scsi_device(dev); | |
242f9dcb | 596 | return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ); |
1da177e4 LT |
597 | } |
598 | ||
599 | static ssize_t | |
ee959b00 TJ |
600 | sdev_store_timeout (struct device *dev, struct device_attribute *attr, |
601 | const char *buf, size_t count) | |
1da177e4 LT |
602 | { |
603 | struct scsi_device *sdev; | |
604 | int timeout; | |
605 | sdev = to_scsi_device(dev); | |
606 | sscanf (buf, "%d\n", &timeout); | |
242f9dcb | 607 | blk_queue_rq_timeout(sdev->request_queue, timeout * HZ); |
1da177e4 LT |
608 | return count; |
609 | } | |
610 | static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); | |
611 | ||
0816c925 MP |
612 | static ssize_t |
613 | sdev_show_eh_timeout(struct device *dev, struct device_attribute *attr, char *buf) | |
614 | { | |
615 | struct scsi_device *sdev; | |
616 | sdev = to_scsi_device(dev); | |
617 | return snprintf(buf, 20, "%u\n", sdev->eh_timeout / HZ); | |
618 | } | |
619 | ||
620 | static ssize_t | |
621 | sdev_store_eh_timeout(struct device *dev, struct device_attribute *attr, | |
622 | const char *buf, size_t count) | |
623 | { | |
624 | struct scsi_device *sdev; | |
625 | unsigned int eh_timeout; | |
626 | int err; | |
627 | ||
628 | if (!capable(CAP_SYS_ADMIN)) | |
629 | return -EACCES; | |
630 | ||
631 | sdev = to_scsi_device(dev); | |
632 | err = kstrtouint(buf, 10, &eh_timeout); | |
633 | if (err) | |
634 | return err; | |
635 | sdev->eh_timeout = eh_timeout * HZ; | |
636 | ||
637 | return count; | |
638 | } | |
639 | static DEVICE_ATTR(eh_timeout, S_IRUGO | S_IWUSR, sdev_show_eh_timeout, sdev_store_eh_timeout); | |
640 | ||
1da177e4 | 641 | static ssize_t |
ee959b00 TJ |
642 | store_rescan_field (struct device *dev, struct device_attribute *attr, |
643 | const char *buf, size_t count) | |
1da177e4 LT |
644 | { |
645 | scsi_rescan_device(dev); | |
646 | return count; | |
647 | } | |
648 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); | |
649 | ||
ee959b00 TJ |
650 | static ssize_t |
651 | sdev_store_delete(struct device *dev, struct device_attribute *attr, | |
652 | const char *buf, size_t count) | |
1da177e4 | 653 | { |
ac0ece91 TH |
654 | if (device_remove_file_self(dev, attr)) |
655 | scsi_remove_device(to_scsi_device(dev)); | |
1da177e4 LT |
656 | return count; |
657 | }; | |
658 | static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); | |
659 | ||
660 | static ssize_t | |
ee959b00 TJ |
661 | store_state_field(struct device *dev, struct device_attribute *attr, |
662 | const char *buf, size_t count) | |
1da177e4 LT |
663 | { |
664 | int i; | |
665 | struct scsi_device *sdev = to_scsi_device(dev); | |
666 | enum scsi_device_state state = 0; | |
667 | ||
6391a113 | 668 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
669 | const int len = strlen(sdev_states[i].name); |
670 | if (strncmp(sdev_states[i].name, buf, len) == 0 && | |
671 | buf[len] == '\n') { | |
672 | state = sdev_states[i].value; | |
673 | break; | |
674 | } | |
675 | } | |
676 | if (!state) | |
677 | return -EINVAL; | |
678 | ||
679 | if (scsi_device_set_state(sdev, state)) | |
680 | return -EINVAL; | |
681 | return count; | |
682 | } | |
683 | ||
684 | static ssize_t | |
10523b3b | 685 | show_state_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
686 | { |
687 | struct scsi_device *sdev = to_scsi_device(dev); | |
688 | const char *name = scsi_device_state_name(sdev->sdev_state); | |
689 | ||
690 | if (!name) | |
691 | return -EINVAL; | |
692 | ||
693 | return snprintf(buf, 20, "%s\n", name); | |
694 | } | |
695 | ||
696 | static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); | |
697 | ||
698 | static ssize_t | |
ee959b00 TJ |
699 | show_queue_type_field(struct device *dev, struct device_attribute *attr, |
700 | char *buf) | |
1da177e4 LT |
701 | { |
702 | struct scsi_device *sdev = to_scsi_device(dev); | |
703 | const char *name = "none"; | |
704 | ||
705 | if (sdev->ordered_tags) | |
706 | name = "ordered"; | |
707 | else if (sdev->simple_tags) | |
708 | name = "simple"; | |
709 | ||
710 | return snprintf(buf, 20, "%s\n", name); | |
711 | } | |
712 | ||
276b20d0 HR |
713 | static ssize_t |
714 | store_queue_type_field(struct device *dev, struct device_attribute *attr, | |
715 | const char *buf, size_t count) | |
716 | { | |
717 | struct scsi_device *sdev = to_scsi_device(dev); | |
718 | struct scsi_host_template *sht = sdev->host->hostt; | |
719 | int tag_type = 0, retval; | |
720 | int prev_tag_type = scsi_get_tag_type(sdev); | |
721 | ||
722 | if (!sdev->tagged_supported || !sht->change_queue_type) | |
723 | return -EINVAL; | |
724 | ||
725 | if (strncmp(buf, "ordered", 7) == 0) | |
726 | tag_type = MSG_ORDERED_TAG; | |
727 | else if (strncmp(buf, "simple", 6) == 0) | |
728 | tag_type = MSG_SIMPLE_TAG; | |
729 | else if (strncmp(buf, "none", 4) != 0) | |
730 | return -EINVAL; | |
731 | ||
732 | if (tag_type == prev_tag_type) | |
733 | return count; | |
734 | ||
735 | retval = sht->change_queue_type(sdev, tag_type); | |
736 | if (retval < 0) | |
737 | return retval; | |
738 | ||
739 | return count; | |
740 | } | |
741 | ||
742 | static DEVICE_ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, | |
743 | store_queue_type_field); | |
1da177e4 | 744 | |
b3ae8780 HR |
745 | #define sdev_vpd_pg_attr(_page) \ |
746 | static ssize_t \ | |
747 | show_vpd_##_page(struct file *filp, struct kobject *kobj, \ | |
748 | struct bin_attribute *bin_attr, \ | |
749 | char *buf, loff_t off, size_t count) \ | |
750 | { \ | |
751 | struct device *dev = container_of(kobj, struct device, kobj); \ | |
752 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
753 | if (!sdev->vpd_##_page) \ | |
754 | return -EINVAL; \ | |
755 | return memory_read_from_buffer(buf, count, &off, \ | |
756 | sdev->vpd_##_page, \ | |
757 | sdev->vpd_##_page##_len); \ | |
758 | } \ | |
759 | static struct bin_attribute dev_attr_vpd_##_page = { \ | |
760 | .attr = {.name = __stringify(vpd_##_page), .mode = S_IRUGO }, \ | |
761 | .size = 0, \ | |
762 | .read = show_vpd_##_page, \ | |
763 | }; | |
764 | ||
765 | sdev_vpd_pg_attr(pg83); | |
766 | sdev_vpd_pg_attr(pg80); | |
1da177e4 LT |
767 | |
768 | static ssize_t | |
b3ae8780 HR |
769 | show_iostat_counterbits(struct device *dev, struct device_attribute *attr, |
770 | char *buf) | |
1da177e4 LT |
771 | { |
772 | return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); | |
773 | } | |
774 | ||
775 | static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); | |
776 | ||
777 | #define show_sdev_iostat(field) \ | |
778 | static ssize_t \ | |
ee959b00 TJ |
779 | show_iostat_##field(struct device *dev, struct device_attribute *attr, \ |
780 | char *buf) \ | |
1da177e4 LT |
781 | { \ |
782 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
783 | unsigned long long count = atomic_read(&sdev->field); \ | |
784 | return snprintf(buf, 20, "0x%llx\n", count); \ | |
785 | } \ | |
786 | static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) | |
787 | ||
788 | show_sdev_iostat(iorequest_cnt); | |
789 | show_sdev_iostat(iodone_cnt); | |
790 | show_sdev_iostat(ioerr_cnt); | |
791 | ||
d7b8bcb0 MT |
792 | static ssize_t |
793 | sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf) | |
794 | { | |
795 | struct scsi_device *sdev; | |
796 | sdev = to_scsi_device(dev); | |
797 | return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type); | |
798 | } | |
799 | static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL); | |
1da177e4 | 800 | |
a341cd0f JG |
801 | #define DECLARE_EVT_SHOW(name, Cap_name) \ |
802 | static ssize_t \ | |
803 | sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \ | |
ee959b00 | 804 | char *buf) \ |
a341cd0f JG |
805 | { \ |
806 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
807 | int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\ | |
808 | return snprintf(buf, 20, "%d\n", val); \ | |
809 | } | |
810 | ||
811 | #define DECLARE_EVT_STORE(name, Cap_name) \ | |
812 | static ssize_t \ | |
ee959b00 | 813 | sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\ |
a341cd0f JG |
814 | const char *buf, size_t count) \ |
815 | { \ | |
816 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
817 | int val = simple_strtoul(buf, NULL, 0); \ | |
818 | if (val == 0) \ | |
819 | clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
820 | else if (val == 1) \ | |
821 | set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
822 | else \ | |
823 | return -EINVAL; \ | |
824 | return count; \ | |
825 | } | |
826 | ||
827 | #define DECLARE_EVT(name, Cap_name) \ | |
828 | DECLARE_EVT_SHOW(name, Cap_name) \ | |
829 | DECLARE_EVT_STORE(name, Cap_name) \ | |
830 | static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \ | |
831 | sdev_store_evt_##name); | |
832 | #define REF_EVT(name) &dev_attr_evt_##name.attr | |
833 | ||
834 | DECLARE_EVT(media_change, MEDIA_CHANGE) | |
279afdfe EM |
835 | DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED) |
836 | DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED) | |
837 | DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED) | |
838 | DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED) | |
839 | DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED) | |
a341cd0f | 840 | |
ee959b00 | 841 | static ssize_t |
276b20d0 HR |
842 | sdev_store_queue_depth(struct device *dev, struct device_attribute *attr, |
843 | const char *buf, size_t count) | |
1da177e4 LT |
844 | { |
845 | int depth, retval; | |
846 | struct scsi_device *sdev = to_scsi_device(dev); | |
847 | struct scsi_host_template *sht = sdev->host->hostt; | |
848 | ||
849 | if (!sht->change_queue_depth) | |
850 | return -EINVAL; | |
851 | ||
852 | depth = simple_strtoul(buf, NULL, 0); | |
853 | ||
854 | if (depth < 1) | |
855 | return -EINVAL; | |
856 | ||
e881a172 MC |
857 | retval = sht->change_queue_depth(sdev, depth, |
858 | SCSI_QDEPTH_DEFAULT); | |
1da177e4 LT |
859 | if (retval < 0) |
860 | return retval; | |
861 | ||
4a84067d VD |
862 | sdev->max_queue_depth = sdev->queue_depth; |
863 | ||
1da177e4 LT |
864 | return count; |
865 | } | |
276b20d0 | 866 | sdev_show_function(queue_depth, "%d\n"); |
1da177e4 | 867 | |
276b20d0 HR |
868 | static DEVICE_ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, |
869 | sdev_store_queue_depth); | |
1da177e4 | 870 | |
4a84067d VD |
871 | static ssize_t |
872 | sdev_show_queue_ramp_up_period(struct device *dev, | |
873 | struct device_attribute *attr, | |
874 | char *buf) | |
875 | { | |
876 | struct scsi_device *sdev; | |
877 | sdev = to_scsi_device(dev); | |
878 | return snprintf(buf, 20, "%u\n", | |
879 | jiffies_to_msecs(sdev->queue_ramp_up_period)); | |
880 | } | |
881 | ||
882 | static ssize_t | |
883 | sdev_store_queue_ramp_up_period(struct device *dev, | |
884 | struct device_attribute *attr, | |
885 | const char *buf, size_t count) | |
886 | { | |
887 | struct scsi_device *sdev = to_scsi_device(dev); | |
888 | unsigned long period; | |
889 | ||
890 | if (strict_strtoul(buf, 10, &period)) | |
891 | return -EINVAL; | |
892 | ||
893 | sdev->queue_ramp_up_period = msecs_to_jiffies(period); | |
894 | return period; | |
895 | } | |
896 | ||
276b20d0 HR |
897 | static DEVICE_ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR, |
898 | sdev_show_queue_ramp_up_period, | |
899 | sdev_store_queue_ramp_up_period); | |
4a84067d | 900 | |
276b20d0 HR |
901 | static umode_t scsi_sdev_attr_is_visible(struct kobject *kobj, |
902 | struct attribute *attr, int i) | |
1da177e4 | 903 | { |
276b20d0 | 904 | struct device *dev = container_of(kobj, struct device, kobj); |
1da177e4 | 905 | struct scsi_device *sdev = to_scsi_device(dev); |
1da177e4 | 906 | |
1da177e4 | 907 | |
276b20d0 HR |
908 | if (attr == &dev_attr_queue_depth.attr && |
909 | !sdev->host->hostt->change_queue_depth) | |
910 | return S_IRUGO; | |
1da177e4 | 911 | |
276b20d0 HR |
912 | if (attr == &dev_attr_queue_ramp_up_period.attr && |
913 | !sdev->host->hostt->change_queue_depth) | |
914 | return 0; | |
1da177e4 | 915 | |
276b20d0 HR |
916 | if (attr == &dev_attr_queue_type.attr && |
917 | !sdev->host->hostt->change_queue_type) | |
918 | return S_IRUGO; | |
1da177e4 | 919 | |
276b20d0 | 920 | return attr->mode; |
1da177e4 LT |
921 | } |
922 | ||
276b20d0 HR |
923 | /* Default template for device attributes. May NOT be modified */ |
924 | static struct attribute *scsi_sdev_attrs[] = { | |
925 | &dev_attr_device_blocked.attr, | |
926 | &dev_attr_type.attr, | |
927 | &dev_attr_scsi_level.attr, | |
928 | &dev_attr_device_busy.attr, | |
929 | &dev_attr_vendor.attr, | |
930 | &dev_attr_model.attr, | |
931 | &dev_attr_rev.attr, | |
932 | &dev_attr_rescan.attr, | |
933 | &dev_attr_delete.attr, | |
934 | &dev_attr_state.attr, | |
935 | &dev_attr_timeout.attr, | |
936 | &dev_attr_eh_timeout.attr, | |
937 | &dev_attr_iocounterbits.attr, | |
938 | &dev_attr_iorequest_cnt.attr, | |
939 | &dev_attr_iodone_cnt.attr, | |
940 | &dev_attr_ioerr_cnt.attr, | |
941 | &dev_attr_modalias.attr, | |
942 | &dev_attr_queue_depth.attr, | |
943 | &dev_attr_queue_type.attr, | |
944 | &dev_attr_queue_ramp_up_period.attr, | |
945 | REF_EVT(media_change), | |
946 | REF_EVT(inquiry_change_reported), | |
947 | REF_EVT(capacity_change_reported), | |
948 | REF_EVT(soft_threshold_reached), | |
949 | REF_EVT(mode_parameter_change_reported), | |
950 | REF_EVT(lun_change_reported), | |
951 | NULL | |
952 | }; | |
953 | ||
b3ae8780 HR |
954 | static struct bin_attribute *scsi_sdev_bin_attrs[] = { |
955 | &dev_attr_vpd_pg83, | |
956 | &dev_attr_vpd_pg80, | |
957 | NULL | |
958 | }; | |
276b20d0 HR |
959 | static struct attribute_group scsi_sdev_attr_group = { |
960 | .attrs = scsi_sdev_attrs, | |
b3ae8780 | 961 | .bin_attrs = scsi_sdev_bin_attrs, |
276b20d0 HR |
962 | .is_visible = scsi_sdev_attr_is_visible, |
963 | }; | |
964 | ||
965 | static const struct attribute_group *scsi_sdev_attr_groups[] = { | |
966 | &scsi_sdev_attr_group, | |
967 | NULL | |
968 | }; | |
969 | ||
643eb2d9 JB |
970 | static int scsi_target_add(struct scsi_target *starget) |
971 | { | |
972 | int error; | |
973 | ||
974 | if (starget->state != STARGET_CREATED) | |
975 | return 0; | |
976 | ||
977 | error = device_add(&starget->dev); | |
978 | if (error) { | |
979 | dev_err(&starget->dev, "target device_add failed, error %d\n", error); | |
643eb2d9 JB |
980 | return error; |
981 | } | |
982 | transport_add_device(&starget->dev); | |
983 | starget->state = STARGET_RUNNING; | |
984 | ||
bc4f2401 AS |
985 | pm_runtime_set_active(&starget->dev); |
986 | pm_runtime_enable(&starget->dev); | |
987 | device_enable_async_suspend(&starget->dev); | |
988 | ||
643eb2d9 JB |
989 | return 0; |
990 | } | |
991 | ||
1da177e4 LT |
992 | /** |
993 | * scsi_sysfs_add_sdev - add scsi device to sysfs | |
994 | * @sdev: scsi_device to add | |
995 | * | |
996 | * Return value: | |
997 | * 0 on Success / non-zero on Failure | |
998 | **/ | |
999 | int scsi_sysfs_add_sdev(struct scsi_device *sdev) | |
1000 | { | |
1001 | int error, i; | |
80ed71ce | 1002 | struct request_queue *rq = sdev->request_queue; |
643eb2d9 | 1003 | struct scsi_target *starget = sdev->sdev_target; |
1da177e4 | 1004 | |
ee37e09d AS |
1005 | error = scsi_device_set_state(sdev, SDEV_RUNNING); |
1006 | if (error) | |
1da177e4 LT |
1007 | return error; |
1008 | ||
643eb2d9 JB |
1009 | error = scsi_target_add(starget); |
1010 | if (error) | |
1011 | return error; | |
1012 | ||
1013 | transport_configure_device(&starget->dev); | |
bc4f2401 | 1014 | |
4cb077d9 | 1015 | device_enable_async_suspend(&sdev->sdev_gendev); |
bc4f2401 AS |
1016 | scsi_autopm_get_target(starget); |
1017 | pm_runtime_set_active(&sdev->sdev_gendev); | |
1018 | pm_runtime_forbid(&sdev->sdev_gendev); | |
1019 | pm_runtime_enable(&sdev->sdev_gendev); | |
1020 | scsi_autopm_put_target(starget); | |
1021 | ||
1022 | /* The following call will keep sdev active indefinitely, until | |
1023 | * its driver does a corresponding scsi_autopm_pm_device(). Only | |
1024 | * drivers supporting autosuspend will do this. | |
1025 | */ | |
1026 | scsi_autopm_get_device(sdev); | |
1027 | ||
1da177e4 LT |
1028 | error = device_add(&sdev->sdev_gendev); |
1029 | if (error) { | |
73d8c34f AS |
1030 | sdev_printk(KERN_INFO, sdev, |
1031 | "failed to add device: %d\n", error); | |
ee37e09d | 1032 | return error; |
1da177e4 | 1033 | } |
4cb077d9 | 1034 | device_enable_async_suspend(&sdev->sdev_dev); |
ee959b00 | 1035 | error = device_add(&sdev->sdev_dev); |
1da177e4 | 1036 | if (error) { |
73d8c34f AS |
1037 | sdev_printk(KERN_INFO, sdev, |
1038 | "failed to add class device: %d\n", error); | |
860dc736 | 1039 | device_del(&sdev->sdev_gendev); |
ee37e09d | 1040 | return error; |
1da177e4 | 1041 | } |
860dc736 JB |
1042 | transport_add_device(&sdev->sdev_gendev); |
1043 | sdev->is_visible = 1; | |
1da177e4 | 1044 | |
97f46ae4 | 1045 | error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL); |
80ed71ce JB |
1046 | |
1047 | if (error) | |
860dc736 JB |
1048 | /* we're treating error on bsg register as non-fatal, |
1049 | * so pretend nothing went wrong */ | |
80ed71ce JB |
1050 | sdev_printk(KERN_INFO, sdev, |
1051 | "Failed to register bsg queue, errno=%d\n", error); | |
1052 | ||
bfd12944 | 1053 | /* add additional host specific attributes */ |
1da177e4 LT |
1054 | if (sdev->host->hostt->sdev_attrs) { |
1055 | for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { | |
bfd12944 | 1056 | error = device_create_file(&sdev->sdev_gendev, |
1da177e4 | 1057 | sdev->host->hostt->sdev_attrs[i]); |
860dc736 | 1058 | if (error) |
ee37e09d | 1059 | return error; |
1da177e4 LT |
1060 | } |
1061 | } | |
1da177e4 | 1062 | |
1da177e4 LT |
1063 | return error; |
1064 | } | |
1065 | ||
903f4fed | 1066 | void __scsi_remove_device(struct scsi_device *sdev) |
1da177e4 | 1067 | { |
df133c21 JB |
1068 | struct device *dev = &sdev->sdev_gendev; |
1069 | ||
860dc736 JB |
1070 | if (sdev->is_visible) { |
1071 | if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0) | |
1072 | return; | |
1da177e4 | 1073 | |
860dc736 JB |
1074 | bsg_unregister_queue(sdev->request_queue); |
1075 | device_unregister(&sdev->sdev_dev); | |
1076 | transport_remove_device(dev); | |
1077 | device_del(dev); | |
1078 | } else | |
1079 | put_device(&sdev->sdev_dev); | |
b485462a BVA |
1080 | |
1081 | /* | |
1082 | * Stop accepting new requests and wait until all queuecommand() and | |
1083 | * scsi_run_queue() invocations have finished before tearing down the | |
1084 | * device. | |
1085 | */ | |
1da177e4 | 1086 | scsi_device_set_state(sdev, SDEV_DEL); |
b485462a BVA |
1087 | blk_cleanup_queue(sdev->request_queue); |
1088 | cancel_work_sync(&sdev->requeue_work); | |
1089 | ||
1da177e4 LT |
1090 | if (sdev->host->hostt->slave_destroy) |
1091 | sdev->host->hostt->slave_destroy(sdev); | |
df133c21 | 1092 | transport_destroy_device(dev); |
86cbfb56 | 1093 | |
e63ed0d7 JB |
1094 | /* |
1095 | * Paired with the kref_get() in scsi_sysfs_initialize(). We have | |
1096 | * remoed sysfs visibility from the device, so make the target | |
1097 | * invisible if this was the last device underneath it. | |
1098 | */ | |
1099 | scsi_target_reap(scsi_target(sdev)); | |
1100 | ||
df133c21 | 1101 | put_device(dev); |
903f4fed AS |
1102 | } |
1103 | ||
1104 | /** | |
1105 | * scsi_remove_device - unregister a device from the scsi bus | |
1106 | * @sdev: scsi_device to unregister | |
1107 | **/ | |
1108 | void scsi_remove_device(struct scsi_device *sdev) | |
1109 | { | |
54195002 AS |
1110 | struct Scsi_Host *shost = sdev->host; |
1111 | ||
0b950672 | 1112 | mutex_lock(&shost->scan_mutex); |
903f4fed | 1113 | __scsi_remove_device(sdev); |
0b950672 | 1114 | mutex_unlock(&shost->scan_mutex); |
1da177e4 LT |
1115 | } |
1116 | EXPORT_SYMBOL(scsi_remove_device); | |
1117 | ||
44818efb | 1118 | static void __scsi_remove_target(struct scsi_target *starget) |
1da177e4 LT |
1119 | { |
1120 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
1121 | unsigned long flags; | |
a64358db | 1122 | struct scsi_device *sdev; |
1da177e4 LT |
1123 | |
1124 | spin_lock_irqsave(shost->host_lock, flags); | |
a64358db AS |
1125 | restart: |
1126 | list_for_each_entry(sdev, &shost->__devices, siblings) { | |
1da177e4 | 1127 | if (sdev->channel != starget->channel || |
a64358db | 1128 | sdev->id != starget->id || |
546ae796 | 1129 | scsi_device_get(sdev)) |
1da177e4 LT |
1130 | continue; |
1131 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1132 | scsi_remove_device(sdev); | |
546ae796 | 1133 | scsi_device_put(sdev); |
1da177e4 | 1134 | spin_lock_irqsave(shost->host_lock, flags); |
a64358db | 1135 | goto restart; |
1da177e4 LT |
1136 | } |
1137 | spin_unlock_irqrestore(shost->host_lock, flags); | |
20b1e674 | 1138 | } |
1139 | ||
1da177e4 LT |
1140 | /** |
1141 | * scsi_remove_target - try to remove a target and all its devices | |
1142 | * @dev: generic starget or parent of generic stargets to be removed | |
1143 | * | |
1144 | * Note: This is slightly racy. It is possible that if the user | |
1145 | * requests the addition of another device then the target won't be | |
1146 | * removed. | |
1147 | */ | |
1148 | void scsi_remove_target(struct device *dev) | |
1149 | { | |
3b661a92 | 1150 | struct Scsi_Host *shost = dev_to_shost(dev->parent); |
bc3f02a7 | 1151 | struct scsi_target *starget, *last = NULL; |
3b661a92 DW |
1152 | unsigned long flags; |
1153 | ||
bc3f02a7 DW |
1154 | /* remove targets being careful to lookup next entry before |
1155 | * deleting the last | |
1156 | */ | |
3b661a92 DW |
1157 | spin_lock_irqsave(shost->host_lock, flags); |
1158 | list_for_each_entry(starget, &shost->__targets, siblings) { | |
1159 | if (starget->state == STARGET_DEL) | |
1160 | continue; | |
1161 | if (starget->dev.parent == dev || &starget->dev == dev) { | |
bc3f02a7 | 1162 | /* assuming new targets arrive at the end */ |
e63ed0d7 | 1163 | kref_get(&starget->reap_ref); |
bc3f02a7 DW |
1164 | spin_unlock_irqrestore(shost->host_lock, flags); |
1165 | if (last) | |
1166 | scsi_target_reap(last); | |
1167 | last = starget; | |
1168 | __scsi_remove_target(starget); | |
1169 | spin_lock_irqsave(shost->host_lock, flags); | |
3b661a92 | 1170 | } |
1da177e4 | 1171 | } |
3b661a92 | 1172 | spin_unlock_irqrestore(shost->host_lock, flags); |
1da177e4 | 1173 | |
bc3f02a7 DW |
1174 | if (last) |
1175 | scsi_target_reap(last); | |
1da177e4 LT |
1176 | } |
1177 | EXPORT_SYMBOL(scsi_remove_target); | |
1178 | ||
1179 | int scsi_register_driver(struct device_driver *drv) | |
1180 | { | |
1181 | drv->bus = &scsi_bus_type; | |
1182 | ||
1183 | return driver_register(drv); | |
1184 | } | |
1185 | EXPORT_SYMBOL(scsi_register_driver); | |
1186 | ||
1187 | int scsi_register_interface(struct class_interface *intf) | |
1188 | { | |
1189 | intf->class = &sdev_class; | |
1190 | ||
1191 | return class_interface_register(intf); | |
1192 | } | |
1193 | EXPORT_SYMBOL(scsi_register_interface); | |
1194 | ||
1da177e4 LT |
1195 | /** |
1196 | * scsi_sysfs_add_host - add scsi host to subsystem | |
1197 | * @shost: scsi host struct to add to subsystem | |
1da177e4 LT |
1198 | **/ |
1199 | int scsi_sysfs_add_host(struct Scsi_Host *shost) | |
1200 | { | |
1201 | int error, i; | |
1202 | ||
f7120a4f | 1203 | /* add host specific attributes */ |
1da177e4 LT |
1204 | if (shost->hostt->shost_attrs) { |
1205 | for (i = 0; shost->hostt->shost_attrs[i]; i++) { | |
ee959b00 | 1206 | error = device_create_file(&shost->shost_dev, |
f7120a4f | 1207 | shost->hostt->shost_attrs[i]); |
1da177e4 LT |
1208 | if (error) |
1209 | return error; | |
1210 | } | |
1211 | } | |
1212 | ||
1213 | transport_register_device(&shost->shost_gendev); | |
d52b3815 | 1214 | transport_configure_device(&shost->shost_gendev); |
1da177e4 LT |
1215 | return 0; |
1216 | } | |
1217 | ||
bfd12944 KS |
1218 | static struct device_type scsi_dev_type = { |
1219 | .name = "scsi_device", | |
1220 | .release = scsi_device_dev_release, | |
1221 | .groups = scsi_sdev_attr_groups, | |
1222 | }; | |
1223 | ||
1da177e4 LT |
1224 | void scsi_sysfs_device_initialize(struct scsi_device *sdev) |
1225 | { | |
1226 | unsigned long flags; | |
1227 | struct Scsi_Host *shost = sdev->host; | |
1228 | struct scsi_target *starget = sdev->sdev_target; | |
1229 | ||
1230 | device_initialize(&sdev->sdev_gendev); | |
1231 | sdev->sdev_gendev.bus = &scsi_bus_type; | |
bfd12944 | 1232 | sdev->sdev_gendev.type = &scsi_dev_type; |
71610f55 KS |
1233 | dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%d", |
1234 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); | |
1235 | ||
ee959b00 | 1236 | device_initialize(&sdev->sdev_dev); |
37e6ba00 | 1237 | sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev); |
ee959b00 | 1238 | sdev->sdev_dev.class = &sdev_class; |
71610f55 KS |
1239 | dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%d", |
1240 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); | |
7c9d6f16 | 1241 | sdev->scsi_level = starget->scsi_level; |
1da177e4 LT |
1242 | transport_setup_device(&sdev->sdev_gendev); |
1243 | spin_lock_irqsave(shost->host_lock, flags); | |
1244 | list_add_tail(&sdev->same_target_siblings, &starget->devices); | |
1245 | list_add_tail(&sdev->siblings, &shost->__devices); | |
1246 | spin_unlock_irqrestore(shost->host_lock, flags); | |
e63ed0d7 JB |
1247 | /* |
1248 | * device can now only be removed via __scsi_remove_device() so hold | |
1249 | * the target. Target will be held in CREATED state until something | |
1250 | * beneath it becomes visible (in which case it moves to RUNNING) | |
1251 | */ | |
1252 | kref_get(&starget->reap_ref); | |
1da177e4 LT |
1253 | } |
1254 | ||
1255 | int scsi_is_sdev_device(const struct device *dev) | |
1256 | { | |
13ba9bcb | 1257 | return dev->type == &scsi_dev_type; |
1da177e4 LT |
1258 | } |
1259 | EXPORT_SYMBOL(scsi_is_sdev_device); | |
1260 | ||
1261 | /* A blank transport template that is used in drivers that don't | |
1262 | * yet implement Transport Attributes */ | |
1263 | struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |