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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 HR |
302 | |
303 | if (shost->transportt && shost->transportt->eh_strategy_handler) | |
304 | return ret; | |
305 | ||
bb3b621a RM |
306 | if (!strncmp(buf, "off", strlen("off"))) |
307 | deadline = -1; | |
308 | else { | |
309 | ret = kstrtoul(buf, 10, &deadline); | |
310 | if (ret) | |
311 | return ret; | |
312 | if (deadline * HZ > UINT_MAX) | |
313 | return -EINVAL; | |
314 | } | |
315 | ||
316 | spin_lock_irqsave(shost->host_lock, flags); | |
317 | if (scsi_host_in_recovery(shost)) | |
318 | ret = -EBUSY; | |
319 | else { | |
320 | if (deadline == -1) | |
321 | shost->eh_deadline = -1; | |
322 | else | |
b4562022 | 323 | shost->eh_deadline = deadline * HZ; |
bb3b621a RM |
324 | |
325 | ret = count; | |
b4562022 | 326 | } |
bb3b621a RM |
327 | spin_unlock_irqrestore(shost->host_lock, flags); |
328 | ||
b4562022 HR |
329 | return ret; |
330 | } | |
331 | ||
332 | static DEVICE_ATTR(eh_deadline, S_IRUGO | S_IWUSR, show_shost_eh_deadline, store_shost_eh_deadline); | |
333 | ||
1da177e4 LT |
334 | shost_rd_attr(unique_id, "%u\n"); |
335 | shost_rd_attr(host_busy, "%hu\n"); | |
336 | shost_rd_attr(cmd_per_lun, "%hd\n"); | |
ed632da8 | 337 | shost_rd_attr(can_queue, "%hd\n"); |
1da177e4 | 338 | shost_rd_attr(sg_tablesize, "%hu\n"); |
13f05c8d | 339 | shost_rd_attr(sg_prot_tablesize, "%hu\n"); |
1da177e4 | 340 | shost_rd_attr(unchecked_isa_dma, "%d\n"); |
4469f987 MP |
341 | shost_rd_attr(prot_capabilities, "%u\n"); |
342 | shost_rd_attr(prot_guard_type, "%hd\n"); | |
1da177e4 LT |
343 | shost_rd_attr2(proc_name, hostt->proc_name, "%s\n"); |
344 | ||
f7120a4f HR |
345 | static struct attribute *scsi_sysfs_shost_attrs[] = { |
346 | &dev_attr_unique_id.attr, | |
347 | &dev_attr_host_busy.attr, | |
348 | &dev_attr_cmd_per_lun.attr, | |
349 | &dev_attr_can_queue.attr, | |
350 | &dev_attr_sg_tablesize.attr, | |
13f05c8d | 351 | &dev_attr_sg_prot_tablesize.attr, |
f7120a4f HR |
352 | &dev_attr_unchecked_isa_dma.attr, |
353 | &dev_attr_proc_name.attr, | |
354 | &dev_attr_scan.attr, | |
355 | &dev_attr_hstate.attr, | |
356 | &dev_attr_supported_mode.attr, | |
357 | &dev_attr_active_mode.attr, | |
4469f987 MP |
358 | &dev_attr_prot_capabilities.attr, |
359 | &dev_attr_prot_guard_type.attr, | |
29443691 | 360 | &dev_attr_host_reset.attr, |
b4562022 | 361 | &dev_attr_eh_deadline.attr, |
f7120a4f HR |
362 | NULL |
363 | }; | |
364 | ||
365 | struct attribute_group scsi_shost_attr_group = { | |
366 | .attrs = scsi_sysfs_shost_attrs, | |
367 | }; | |
368 | ||
a4dbd674 | 369 | const struct attribute_group *scsi_sysfs_shost_attr_groups[] = { |
f7120a4f | 370 | &scsi_shost_attr_group, |
1da177e4 LT |
371 | NULL |
372 | }; | |
373 | ||
ee959b00 | 374 | static void scsi_device_cls_release(struct device *class_dev) |
1da177e4 LT |
375 | { |
376 | struct scsi_device *sdev; | |
377 | ||
378 | sdev = class_to_sdev(class_dev); | |
379 | put_device(&sdev->sdev_gendev); | |
380 | } | |
381 | ||
65f27f38 | 382 | static void scsi_device_dev_release_usercontext(struct work_struct *work) |
1da177e4 LT |
383 | { |
384 | struct scsi_device *sdev; | |
385 | struct device *parent; | |
386 | struct scsi_target *starget; | |
a341cd0f | 387 | struct list_head *this, *tmp; |
1da177e4 LT |
388 | unsigned long flags; |
389 | ||
65f27f38 DH |
390 | sdev = container_of(work, struct scsi_device, ew.work); |
391 | ||
392 | parent = sdev->sdev_gendev.parent; | |
1da177e4 LT |
393 | starget = to_scsi_target(parent); |
394 | ||
395 | spin_lock_irqsave(sdev->host->host_lock, flags); | |
396 | starget->reap_ref++; | |
397 | list_del(&sdev->siblings); | |
398 | list_del(&sdev->same_target_siblings); | |
399 | list_del(&sdev->starved_entry); | |
400 | spin_unlock_irqrestore(sdev->host->host_lock, flags); | |
401 | ||
a341cd0f JG |
402 | cancel_work_sync(&sdev->event_work); |
403 | ||
404 | list_for_each_safe(this, tmp, &sdev->event_list) { | |
405 | struct scsi_event *evt; | |
406 | ||
407 | evt = list_entry(this, struct scsi_event, node); | |
408 | list_del(&evt->node); | |
409 | kfree(evt); | |
410 | } | |
411 | ||
e73e079b | 412 | blk_put_queue(sdev->request_queue); |
86cbfb56 JB |
413 | /* NULL queue means the device can't be used */ |
414 | sdev->request_queue = NULL; | |
1da177e4 LT |
415 | |
416 | scsi_target_reap(scsi_target(sdev)); | |
417 | ||
418 | kfree(sdev->inquiry); | |
419 | kfree(sdev); | |
420 | ||
421 | if (parent) | |
422 | put_device(parent); | |
423 | } | |
424 | ||
65110b21 JB |
425 | static void scsi_device_dev_release(struct device *dev) |
426 | { | |
ffedb452 | 427 | struct scsi_device *sdp = to_scsi_device(dev); |
65f27f38 | 428 | execute_in_process_context(scsi_device_dev_release_usercontext, |
ffedb452 | 429 | &sdp->ew); |
65110b21 JB |
430 | } |
431 | ||
52c1da39 | 432 | static struct class sdev_class = { |
1da177e4 | 433 | .name = "scsi_device", |
ee959b00 | 434 | .dev_release = scsi_device_cls_release, |
1da177e4 LT |
435 | }; |
436 | ||
437 | /* all probing is done in the individual ->probe routines */ | |
438 | static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) | |
439 | { | |
b0ed4336 HR |
440 | struct scsi_device *sdp; |
441 | ||
442 | if (dev->type != &scsi_dev_type) | |
443 | return 0; | |
444 | ||
445 | sdp = to_scsi_device(dev); | |
1da177e4 LT |
446 | if (sdp->no_uld_attach) |
447 | return 0; | |
448 | return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; | |
449 | } | |
450 | ||
7eff2e7a | 451 | static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
d7b8bcb0 | 452 | { |
1f42ea7b JB |
453 | struct scsi_device *sdev; |
454 | ||
455 | if (dev->type != &scsi_dev_type) | |
456 | return 0; | |
457 | ||
458 | sdev = to_scsi_device(dev); | |
d7b8bcb0 | 459 | |
7eff2e7a | 460 | add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type); |
d7b8bcb0 MT |
461 | return 0; |
462 | } | |
463 | ||
1da177e4 LT |
464 | struct bus_type scsi_bus_type = { |
465 | .name = "scsi", | |
466 | .match = scsi_bus_match, | |
d7b8bcb0 | 467 | .uevent = scsi_bus_uevent, |
aa338601 | 468 | #ifdef CONFIG_PM |
db5bd1e0 | 469 | .pm = &scsi_bus_pm_ops, |
e6da54d8 | 470 | #endif |
1da177e4 | 471 | }; |
a6a8d9f8 | 472 | EXPORT_SYMBOL_GPL(scsi_bus_type); |
1da177e4 LT |
473 | |
474 | int scsi_sysfs_register(void) | |
475 | { | |
476 | int error; | |
477 | ||
478 | error = bus_register(&scsi_bus_type); | |
479 | if (!error) { | |
480 | error = class_register(&sdev_class); | |
481 | if (error) | |
482 | bus_unregister(&scsi_bus_type); | |
483 | } | |
484 | ||
485 | return error; | |
486 | } | |
487 | ||
488 | void scsi_sysfs_unregister(void) | |
489 | { | |
490 | class_unregister(&sdev_class); | |
491 | bus_unregister(&scsi_bus_type); | |
492 | } | |
493 | ||
494 | /* | |
495 | * sdev_show_function: macro to create an attr function that can be used to | |
496 | * show a non-bit field. | |
497 | */ | |
498 | #define sdev_show_function(field, format_string) \ | |
499 | static ssize_t \ | |
ee959b00 TJ |
500 | sdev_show_##field (struct device *dev, struct device_attribute *attr, \ |
501 | char *buf) \ | |
1da177e4 LT |
502 | { \ |
503 | struct scsi_device *sdev; \ | |
504 | sdev = to_scsi_device(dev); \ | |
505 | return snprintf (buf, 20, format_string, sdev->field); \ | |
506 | } \ | |
507 | ||
508 | /* | |
509 | * sdev_rd_attr: macro to create a function and attribute variable for a | |
510 | * read only field. | |
511 | */ | |
512 | #define sdev_rd_attr(field, format_string) \ | |
513 | sdev_show_function(field, format_string) \ | |
514 | static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); | |
515 | ||
516 | ||
517 | /* | |
160e7f67 | 518 | * sdev_rw_attr: create a function and attribute variable for a |
1da177e4 LT |
519 | * read/write field. |
520 | */ | |
521 | #define sdev_rw_attr(field, format_string) \ | |
522 | sdev_show_function(field, format_string) \ | |
523 | \ | |
524 | static ssize_t \ | |
ee959b00 TJ |
525 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
526 | const char *buf, size_t count) \ | |
1da177e4 LT |
527 | { \ |
528 | struct scsi_device *sdev; \ | |
529 | sdev = to_scsi_device(dev); \ | |
160e7f67 | 530 | sscanf (buf, format_string, &sdev->field); \ |
1da177e4 LT |
531 | return count; \ |
532 | } \ | |
533 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
534 | ||
535 | /* Currently we don't export bit fields, but we might in future, | |
536 | * so leave this code in */ | |
537 | #if 0 | |
538 | /* | |
539 | * sdev_rd_attr: create a function and attribute variable for a | |
540 | * read/write bit field. | |
541 | */ | |
542 | #define sdev_rw_attr_bit(field) \ | |
543 | sdev_show_function(field, "%d\n") \ | |
544 | \ | |
545 | static ssize_t \ | |
ee959b00 TJ |
546 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
547 | const char *buf, size_t count) \ | |
1da177e4 LT |
548 | { \ |
549 | int ret; \ | |
550 | struct scsi_device *sdev; \ | |
551 | ret = scsi_sdev_check_buf_bit(buf); \ | |
552 | if (ret >= 0) { \ | |
553 | sdev = to_scsi_device(dev); \ | |
554 | sdev->field = ret; \ | |
555 | ret = count; \ | |
556 | } \ | |
557 | return ret; \ | |
558 | } \ | |
559 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
560 | ||
561 | /* | |
562 | * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", | |
563 | * else return -EINVAL. | |
564 | */ | |
565 | static int scsi_sdev_check_buf_bit(const char *buf) | |
566 | { | |
567 | if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { | |
568 | if (buf[0] == '1') | |
569 | return 1; | |
570 | else if (buf[0] == '0') | |
571 | return 0; | |
572 | else | |
573 | return -EINVAL; | |
574 | } else | |
575 | return -EINVAL; | |
576 | } | |
577 | #endif | |
578 | /* | |
579 | * Create the actual show/store functions and data structures. | |
580 | */ | |
581 | sdev_rd_attr (device_blocked, "%d\n"); | |
582 | sdev_rd_attr (queue_depth, "%d\n"); | |
522db3c9 | 583 | sdev_rd_attr (device_busy, "%d\n"); |
1da177e4 LT |
584 | sdev_rd_attr (type, "%d\n"); |
585 | sdev_rd_attr (scsi_level, "%d\n"); | |
586 | sdev_rd_attr (vendor, "%.8s\n"); | |
587 | sdev_rd_attr (model, "%.16s\n"); | |
588 | sdev_rd_attr (rev, "%.4s\n"); | |
589 | ||
242f9dcb JA |
590 | /* |
591 | * TODO: can we make these symlinks to the block layer ones? | |
592 | */ | |
1da177e4 | 593 | static ssize_t |
10523b3b | 594 | sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
595 | { |
596 | struct scsi_device *sdev; | |
597 | sdev = to_scsi_device(dev); | |
242f9dcb | 598 | return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ); |
1da177e4 LT |
599 | } |
600 | ||
601 | static ssize_t | |
ee959b00 TJ |
602 | sdev_store_timeout (struct device *dev, struct device_attribute *attr, |
603 | const char *buf, size_t count) | |
1da177e4 LT |
604 | { |
605 | struct scsi_device *sdev; | |
606 | int timeout; | |
607 | sdev = to_scsi_device(dev); | |
608 | sscanf (buf, "%d\n", &timeout); | |
242f9dcb | 609 | blk_queue_rq_timeout(sdev->request_queue, timeout * HZ); |
1da177e4 LT |
610 | return count; |
611 | } | |
612 | static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); | |
613 | ||
0816c925 MP |
614 | static ssize_t |
615 | sdev_show_eh_timeout(struct device *dev, struct device_attribute *attr, char *buf) | |
616 | { | |
617 | struct scsi_device *sdev; | |
618 | sdev = to_scsi_device(dev); | |
619 | return snprintf(buf, 20, "%u\n", sdev->eh_timeout / HZ); | |
620 | } | |
621 | ||
622 | static ssize_t | |
623 | sdev_store_eh_timeout(struct device *dev, struct device_attribute *attr, | |
624 | const char *buf, size_t count) | |
625 | { | |
626 | struct scsi_device *sdev; | |
627 | unsigned int eh_timeout; | |
628 | int err; | |
629 | ||
630 | if (!capable(CAP_SYS_ADMIN)) | |
631 | return -EACCES; | |
632 | ||
633 | sdev = to_scsi_device(dev); | |
634 | err = kstrtouint(buf, 10, &eh_timeout); | |
635 | if (err) | |
636 | return err; | |
637 | sdev->eh_timeout = eh_timeout * HZ; | |
638 | ||
639 | return count; | |
640 | } | |
641 | static DEVICE_ATTR(eh_timeout, S_IRUGO | S_IWUSR, sdev_show_eh_timeout, sdev_store_eh_timeout); | |
642 | ||
1da177e4 | 643 | static ssize_t |
ee959b00 TJ |
644 | store_rescan_field (struct device *dev, struct device_attribute *attr, |
645 | const char *buf, size_t count) | |
1da177e4 LT |
646 | { |
647 | scsi_rescan_device(dev); | |
648 | return count; | |
649 | } | |
650 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); | |
651 | ||
d9a9cdfb AS |
652 | static void sdev_store_delete_callback(struct device *dev) |
653 | { | |
654 | scsi_remove_device(to_scsi_device(dev)); | |
655 | } | |
656 | ||
ee959b00 TJ |
657 | static ssize_t |
658 | sdev_store_delete(struct device *dev, struct device_attribute *attr, | |
659 | const char *buf, size_t count) | |
1da177e4 | 660 | { |
d9a9cdfb AS |
661 | int rc; |
662 | ||
663 | /* An attribute cannot be unregistered by one of its own methods, | |
664 | * so we have to use this roundabout approach. | |
665 | */ | |
666 | rc = device_schedule_callback(dev, sdev_store_delete_callback); | |
667 | if (rc) | |
668 | count = rc; | |
1da177e4 LT |
669 | return count; |
670 | }; | |
671 | static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); | |
672 | ||
673 | static ssize_t | |
ee959b00 TJ |
674 | store_state_field(struct device *dev, struct device_attribute *attr, |
675 | const char *buf, size_t count) | |
1da177e4 LT |
676 | { |
677 | int i; | |
678 | struct scsi_device *sdev = to_scsi_device(dev); | |
679 | enum scsi_device_state state = 0; | |
680 | ||
6391a113 | 681 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
682 | const int len = strlen(sdev_states[i].name); |
683 | if (strncmp(sdev_states[i].name, buf, len) == 0 && | |
684 | buf[len] == '\n') { | |
685 | state = sdev_states[i].value; | |
686 | break; | |
687 | } | |
688 | } | |
689 | if (!state) | |
690 | return -EINVAL; | |
691 | ||
692 | if (scsi_device_set_state(sdev, state)) | |
693 | return -EINVAL; | |
694 | return count; | |
695 | } | |
696 | ||
697 | static ssize_t | |
10523b3b | 698 | show_state_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
699 | { |
700 | struct scsi_device *sdev = to_scsi_device(dev); | |
701 | const char *name = scsi_device_state_name(sdev->sdev_state); | |
702 | ||
703 | if (!name) | |
704 | return -EINVAL; | |
705 | ||
706 | return snprintf(buf, 20, "%s\n", name); | |
707 | } | |
708 | ||
709 | static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); | |
710 | ||
711 | static ssize_t | |
ee959b00 TJ |
712 | show_queue_type_field(struct device *dev, struct device_attribute *attr, |
713 | char *buf) | |
1da177e4 LT |
714 | { |
715 | struct scsi_device *sdev = to_scsi_device(dev); | |
716 | const char *name = "none"; | |
717 | ||
718 | if (sdev->ordered_tags) | |
719 | name = "ordered"; | |
720 | else if (sdev->simple_tags) | |
721 | name = "simple"; | |
722 | ||
723 | return snprintf(buf, 20, "%s\n", name); | |
724 | } | |
725 | ||
726 | static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL); | |
727 | ||
728 | static ssize_t | |
ee959b00 | 729 | show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
730 | { |
731 | return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); | |
732 | } | |
733 | ||
734 | static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); | |
735 | ||
736 | #define show_sdev_iostat(field) \ | |
737 | static ssize_t \ | |
ee959b00 TJ |
738 | show_iostat_##field(struct device *dev, struct device_attribute *attr, \ |
739 | char *buf) \ | |
1da177e4 LT |
740 | { \ |
741 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
742 | unsigned long long count = atomic_read(&sdev->field); \ | |
743 | return snprintf(buf, 20, "0x%llx\n", count); \ | |
744 | } \ | |
745 | static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) | |
746 | ||
747 | show_sdev_iostat(iorequest_cnt); | |
748 | show_sdev_iostat(iodone_cnt); | |
749 | show_sdev_iostat(ioerr_cnt); | |
750 | ||
d7b8bcb0 MT |
751 | static ssize_t |
752 | sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf) | |
753 | { | |
754 | struct scsi_device *sdev; | |
755 | sdev = to_scsi_device(dev); | |
756 | return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type); | |
757 | } | |
758 | static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL); | |
1da177e4 | 759 | |
a341cd0f JG |
760 | #define DECLARE_EVT_SHOW(name, Cap_name) \ |
761 | static ssize_t \ | |
762 | sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \ | |
ee959b00 | 763 | char *buf) \ |
a341cd0f JG |
764 | { \ |
765 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
766 | int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\ | |
767 | return snprintf(buf, 20, "%d\n", val); \ | |
768 | } | |
769 | ||
770 | #define DECLARE_EVT_STORE(name, Cap_name) \ | |
771 | static ssize_t \ | |
ee959b00 | 772 | sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\ |
a341cd0f JG |
773 | const char *buf, size_t count) \ |
774 | { \ | |
775 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
776 | int val = simple_strtoul(buf, NULL, 0); \ | |
777 | if (val == 0) \ | |
778 | clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
779 | else if (val == 1) \ | |
780 | set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
781 | else \ | |
782 | return -EINVAL; \ | |
783 | return count; \ | |
784 | } | |
785 | ||
786 | #define DECLARE_EVT(name, Cap_name) \ | |
787 | DECLARE_EVT_SHOW(name, Cap_name) \ | |
788 | DECLARE_EVT_STORE(name, Cap_name) \ | |
789 | static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \ | |
790 | sdev_store_evt_##name); | |
791 | #define REF_EVT(name) &dev_attr_evt_##name.attr | |
792 | ||
793 | DECLARE_EVT(media_change, MEDIA_CHANGE) | |
279afdfe EM |
794 | DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED) |
795 | DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED) | |
796 | DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED) | |
797 | DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED) | |
798 | DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED) | |
a341cd0f | 799 | |
1da177e4 | 800 | /* Default template for device attributes. May NOT be modified */ |
bfd12944 KS |
801 | static struct attribute *scsi_sdev_attrs[] = { |
802 | &dev_attr_device_blocked.attr, | |
803 | &dev_attr_type.attr, | |
804 | &dev_attr_scsi_level.attr, | |
522db3c9 | 805 | &dev_attr_device_busy.attr, |
bfd12944 KS |
806 | &dev_attr_vendor.attr, |
807 | &dev_attr_model.attr, | |
808 | &dev_attr_rev.attr, | |
809 | &dev_attr_rescan.attr, | |
810 | &dev_attr_delete.attr, | |
811 | &dev_attr_state.attr, | |
812 | &dev_attr_timeout.attr, | |
0816c925 | 813 | &dev_attr_eh_timeout.attr, |
bfd12944 KS |
814 | &dev_attr_iocounterbits.attr, |
815 | &dev_attr_iorequest_cnt.attr, | |
816 | &dev_attr_iodone_cnt.attr, | |
817 | &dev_attr_ioerr_cnt.attr, | |
818 | &dev_attr_modalias.attr, | |
a341cd0f | 819 | REF_EVT(media_change), |
279afdfe EM |
820 | REF_EVT(inquiry_change_reported), |
821 | REF_EVT(capacity_change_reported), | |
822 | REF_EVT(soft_threshold_reached), | |
823 | REF_EVT(mode_parameter_change_reported), | |
824 | REF_EVT(lun_change_reported), | |
bfd12944 KS |
825 | NULL |
826 | }; | |
827 | ||
828 | static struct attribute_group scsi_sdev_attr_group = { | |
829 | .attrs = scsi_sdev_attrs, | |
830 | }; | |
831 | ||
a4dbd674 | 832 | static const struct attribute_group *scsi_sdev_attr_groups[] = { |
bfd12944 | 833 | &scsi_sdev_attr_group, |
1da177e4 LT |
834 | NULL |
835 | }; | |
836 | ||
ee959b00 TJ |
837 | static ssize_t |
838 | sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr, | |
839 | const char *buf, size_t count) | |
1da177e4 LT |
840 | { |
841 | int depth, retval; | |
842 | struct scsi_device *sdev = to_scsi_device(dev); | |
843 | struct scsi_host_template *sht = sdev->host->hostt; | |
844 | ||
845 | if (!sht->change_queue_depth) | |
846 | return -EINVAL; | |
847 | ||
848 | depth = simple_strtoul(buf, NULL, 0); | |
849 | ||
850 | if (depth < 1) | |
851 | return -EINVAL; | |
852 | ||
e881a172 MC |
853 | retval = sht->change_queue_depth(sdev, depth, |
854 | SCSI_QDEPTH_DEFAULT); | |
1da177e4 LT |
855 | if (retval < 0) |
856 | return retval; | |
857 | ||
4a84067d VD |
858 | sdev->max_queue_depth = sdev->queue_depth; |
859 | ||
1da177e4 LT |
860 | return count; |
861 | } | |
862 | ||
863 | static struct device_attribute sdev_attr_queue_depth_rw = | |
864 | __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, | |
865 | sdev_store_queue_depth_rw); | |
866 | ||
4a84067d VD |
867 | static ssize_t |
868 | sdev_show_queue_ramp_up_period(struct device *dev, | |
869 | struct device_attribute *attr, | |
870 | char *buf) | |
871 | { | |
872 | struct scsi_device *sdev; | |
873 | sdev = to_scsi_device(dev); | |
874 | return snprintf(buf, 20, "%u\n", | |
875 | jiffies_to_msecs(sdev->queue_ramp_up_period)); | |
876 | } | |
877 | ||
878 | static ssize_t | |
879 | sdev_store_queue_ramp_up_period(struct device *dev, | |
880 | struct device_attribute *attr, | |
881 | const char *buf, size_t count) | |
882 | { | |
883 | struct scsi_device *sdev = to_scsi_device(dev); | |
884 | unsigned long period; | |
885 | ||
886 | if (strict_strtoul(buf, 10, &period)) | |
887 | return -EINVAL; | |
888 | ||
889 | sdev->queue_ramp_up_period = msecs_to_jiffies(period); | |
890 | return period; | |
891 | } | |
892 | ||
893 | static struct device_attribute sdev_attr_queue_ramp_up_period = | |
894 | __ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR, | |
895 | sdev_show_queue_ramp_up_period, | |
896 | sdev_store_queue_ramp_up_period); | |
897 | ||
ee959b00 TJ |
898 | static ssize_t |
899 | sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr, | |
900 | const char *buf, size_t count) | |
1da177e4 LT |
901 | { |
902 | struct scsi_device *sdev = to_scsi_device(dev); | |
903 | struct scsi_host_template *sht = sdev->host->hostt; | |
904 | int tag_type = 0, retval; | |
905 | int prev_tag_type = scsi_get_tag_type(sdev); | |
906 | ||
907 | if (!sdev->tagged_supported || !sht->change_queue_type) | |
908 | return -EINVAL; | |
909 | ||
910 | if (strncmp(buf, "ordered", 7) == 0) | |
911 | tag_type = MSG_ORDERED_TAG; | |
912 | else if (strncmp(buf, "simple", 6) == 0) | |
913 | tag_type = MSG_SIMPLE_TAG; | |
914 | else if (strncmp(buf, "none", 4) != 0) | |
915 | return -EINVAL; | |
916 | ||
917 | if (tag_type == prev_tag_type) | |
918 | return count; | |
919 | ||
920 | retval = sht->change_queue_type(sdev, tag_type); | |
921 | if (retval < 0) | |
922 | return retval; | |
923 | ||
924 | return count; | |
925 | } | |
926 | ||
643eb2d9 JB |
927 | static int scsi_target_add(struct scsi_target *starget) |
928 | { | |
929 | int error; | |
930 | ||
931 | if (starget->state != STARGET_CREATED) | |
932 | return 0; | |
933 | ||
934 | error = device_add(&starget->dev); | |
935 | if (error) { | |
936 | dev_err(&starget->dev, "target device_add failed, error %d\n", error); | |
643eb2d9 JB |
937 | return error; |
938 | } | |
939 | transport_add_device(&starget->dev); | |
940 | starget->state = STARGET_RUNNING; | |
941 | ||
bc4f2401 AS |
942 | pm_runtime_set_active(&starget->dev); |
943 | pm_runtime_enable(&starget->dev); | |
944 | device_enable_async_suspend(&starget->dev); | |
945 | ||
643eb2d9 JB |
946 | return 0; |
947 | } | |
948 | ||
1da177e4 LT |
949 | static struct device_attribute sdev_attr_queue_type_rw = |
950 | __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, | |
951 | sdev_store_queue_type_rw); | |
952 | ||
1da177e4 LT |
953 | /** |
954 | * scsi_sysfs_add_sdev - add scsi device to sysfs | |
955 | * @sdev: scsi_device to add | |
956 | * | |
957 | * Return value: | |
958 | * 0 on Success / non-zero on Failure | |
959 | **/ | |
960 | int scsi_sysfs_add_sdev(struct scsi_device *sdev) | |
961 | { | |
962 | int error, i; | |
80ed71ce | 963 | struct request_queue *rq = sdev->request_queue; |
643eb2d9 | 964 | struct scsi_target *starget = sdev->sdev_target; |
1da177e4 | 965 | |
ee37e09d AS |
966 | error = scsi_device_set_state(sdev, SDEV_RUNNING); |
967 | if (error) | |
1da177e4 LT |
968 | return error; |
969 | ||
643eb2d9 JB |
970 | error = scsi_target_add(starget); |
971 | if (error) | |
972 | return error; | |
973 | ||
974 | transport_configure_device(&starget->dev); | |
bc4f2401 | 975 | |
4cb077d9 | 976 | device_enable_async_suspend(&sdev->sdev_gendev); |
bc4f2401 AS |
977 | scsi_autopm_get_target(starget); |
978 | pm_runtime_set_active(&sdev->sdev_gendev); | |
979 | pm_runtime_forbid(&sdev->sdev_gendev); | |
980 | pm_runtime_enable(&sdev->sdev_gendev); | |
981 | scsi_autopm_put_target(starget); | |
982 | ||
983 | /* The following call will keep sdev active indefinitely, until | |
984 | * its driver does a corresponding scsi_autopm_pm_device(). Only | |
985 | * drivers supporting autosuspend will do this. | |
986 | */ | |
987 | scsi_autopm_get_device(sdev); | |
988 | ||
1da177e4 LT |
989 | error = device_add(&sdev->sdev_gendev); |
990 | if (error) { | |
73d8c34f AS |
991 | sdev_printk(KERN_INFO, sdev, |
992 | "failed to add device: %d\n", error); | |
ee37e09d | 993 | return error; |
1da177e4 | 994 | } |
4cb077d9 | 995 | device_enable_async_suspend(&sdev->sdev_dev); |
ee959b00 | 996 | error = device_add(&sdev->sdev_dev); |
1da177e4 | 997 | if (error) { |
73d8c34f AS |
998 | sdev_printk(KERN_INFO, sdev, |
999 | "failed to add class device: %d\n", error); | |
860dc736 | 1000 | device_del(&sdev->sdev_gendev); |
ee37e09d | 1001 | return error; |
1da177e4 | 1002 | } |
860dc736 JB |
1003 | transport_add_device(&sdev->sdev_gendev); |
1004 | sdev->is_visible = 1; | |
1da177e4 | 1005 | |
bfd12944 | 1006 | /* create queue files, which may be writable, depending on the host */ |
4a84067d VD |
1007 | if (sdev->host->hostt->change_queue_depth) { |
1008 | error = device_create_file(&sdev->sdev_gendev, | |
1009 | &sdev_attr_queue_depth_rw); | |
1010 | error = device_create_file(&sdev->sdev_gendev, | |
1011 | &sdev_attr_queue_ramp_up_period); | |
1012 | } | |
bfd12944 KS |
1013 | else |
1014 | error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_depth); | |
860dc736 | 1015 | if (error) |
ee37e09d | 1016 | return error; |
860dc736 | 1017 | |
bfd12944 KS |
1018 | if (sdev->host->hostt->change_queue_type) |
1019 | error = device_create_file(&sdev->sdev_gendev, &sdev_attr_queue_type_rw); | |
1020 | else | |
1021 | error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_type); | |
860dc736 | 1022 | if (error) |
ee37e09d | 1023 | return error; |
bfd12944 | 1024 | |
97f46ae4 | 1025 | error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL); |
80ed71ce JB |
1026 | |
1027 | if (error) | |
860dc736 JB |
1028 | /* we're treating error on bsg register as non-fatal, |
1029 | * so pretend nothing went wrong */ | |
80ed71ce JB |
1030 | sdev_printk(KERN_INFO, sdev, |
1031 | "Failed to register bsg queue, errno=%d\n", error); | |
1032 | ||
bfd12944 | 1033 | /* add additional host specific attributes */ |
1da177e4 LT |
1034 | if (sdev->host->hostt->sdev_attrs) { |
1035 | for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { | |
bfd12944 | 1036 | error = device_create_file(&sdev->sdev_gendev, |
1da177e4 | 1037 | sdev->host->hostt->sdev_attrs[i]); |
860dc736 | 1038 | if (error) |
ee37e09d | 1039 | return error; |
1da177e4 LT |
1040 | } |
1041 | } | |
1da177e4 | 1042 | |
1da177e4 LT |
1043 | return error; |
1044 | } | |
1045 | ||
903f4fed | 1046 | void __scsi_remove_device(struct scsi_device *sdev) |
1da177e4 | 1047 | { |
df133c21 JB |
1048 | struct device *dev = &sdev->sdev_gendev; |
1049 | ||
860dc736 JB |
1050 | if (sdev->is_visible) { |
1051 | if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0) | |
1052 | return; | |
1da177e4 | 1053 | |
860dc736 JB |
1054 | bsg_unregister_queue(sdev->request_queue); |
1055 | device_unregister(&sdev->sdev_dev); | |
1056 | transport_remove_device(dev); | |
1057 | device_del(dev); | |
1058 | } else | |
1059 | put_device(&sdev->sdev_dev); | |
b485462a BVA |
1060 | |
1061 | /* | |
1062 | * Stop accepting new requests and wait until all queuecommand() and | |
1063 | * scsi_run_queue() invocations have finished before tearing down the | |
1064 | * device. | |
1065 | */ | |
1da177e4 | 1066 | scsi_device_set_state(sdev, SDEV_DEL); |
b485462a BVA |
1067 | blk_cleanup_queue(sdev->request_queue); |
1068 | cancel_work_sync(&sdev->requeue_work); | |
1069 | ||
1da177e4 LT |
1070 | if (sdev->host->hostt->slave_destroy) |
1071 | sdev->host->hostt->slave_destroy(sdev); | |
df133c21 | 1072 | transport_destroy_device(dev); |
86cbfb56 | 1073 | |
df133c21 | 1074 | put_device(dev); |
903f4fed AS |
1075 | } |
1076 | ||
1077 | /** | |
1078 | * scsi_remove_device - unregister a device from the scsi bus | |
1079 | * @sdev: scsi_device to unregister | |
1080 | **/ | |
1081 | void scsi_remove_device(struct scsi_device *sdev) | |
1082 | { | |
54195002 AS |
1083 | struct Scsi_Host *shost = sdev->host; |
1084 | ||
0b950672 | 1085 | mutex_lock(&shost->scan_mutex); |
903f4fed | 1086 | __scsi_remove_device(sdev); |
0b950672 | 1087 | mutex_unlock(&shost->scan_mutex); |
1da177e4 LT |
1088 | } |
1089 | EXPORT_SYMBOL(scsi_remove_device); | |
1090 | ||
44818efb | 1091 | static void __scsi_remove_target(struct scsi_target *starget) |
1da177e4 LT |
1092 | { |
1093 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
1094 | unsigned long flags; | |
a64358db | 1095 | struct scsi_device *sdev; |
1da177e4 LT |
1096 | |
1097 | spin_lock_irqsave(shost->host_lock, flags); | |
a64358db AS |
1098 | restart: |
1099 | list_for_each_entry(sdev, &shost->__devices, siblings) { | |
1da177e4 | 1100 | if (sdev->channel != starget->channel || |
a64358db | 1101 | sdev->id != starget->id || |
546ae796 | 1102 | scsi_device_get(sdev)) |
1da177e4 LT |
1103 | continue; |
1104 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1105 | scsi_remove_device(sdev); | |
546ae796 | 1106 | scsi_device_put(sdev); |
1da177e4 | 1107 | spin_lock_irqsave(shost->host_lock, flags); |
a64358db | 1108 | goto restart; |
1da177e4 LT |
1109 | } |
1110 | spin_unlock_irqrestore(shost->host_lock, flags); | |
20b1e674 PM |
1111 | } |
1112 | ||
1da177e4 LT |
1113 | /** |
1114 | * scsi_remove_target - try to remove a target and all its devices | |
1115 | * @dev: generic starget or parent of generic stargets to be removed | |
1116 | * | |
1117 | * Note: This is slightly racy. It is possible that if the user | |
1118 | * requests the addition of another device then the target won't be | |
1119 | * removed. | |
1120 | */ | |
1121 | void scsi_remove_target(struct device *dev) | |
1122 | { | |
3b661a92 | 1123 | struct Scsi_Host *shost = dev_to_shost(dev->parent); |
bc3f02a7 | 1124 | struct scsi_target *starget, *last = NULL; |
3b661a92 DW |
1125 | unsigned long flags; |
1126 | ||
bc3f02a7 DW |
1127 | /* remove targets being careful to lookup next entry before |
1128 | * deleting the last | |
1129 | */ | |
3b661a92 DW |
1130 | spin_lock_irqsave(shost->host_lock, flags); |
1131 | list_for_each_entry(starget, &shost->__targets, siblings) { | |
1132 | if (starget->state == STARGET_DEL) | |
1133 | continue; | |
1134 | if (starget->dev.parent == dev || &starget->dev == dev) { | |
bc3f02a7 DW |
1135 | /* assuming new targets arrive at the end */ |
1136 | starget->reap_ref++; | |
1137 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1138 | if (last) | |
1139 | scsi_target_reap(last); | |
1140 | last = starget; | |
1141 | __scsi_remove_target(starget); | |
1142 | spin_lock_irqsave(shost->host_lock, flags); | |
3b661a92 | 1143 | } |
1da177e4 | 1144 | } |
3b661a92 | 1145 | spin_unlock_irqrestore(shost->host_lock, flags); |
1da177e4 | 1146 | |
bc3f02a7 DW |
1147 | if (last) |
1148 | scsi_target_reap(last); | |
1da177e4 LT |
1149 | } |
1150 | EXPORT_SYMBOL(scsi_remove_target); | |
1151 | ||
1152 | int scsi_register_driver(struct device_driver *drv) | |
1153 | { | |
1154 | drv->bus = &scsi_bus_type; | |
1155 | ||
1156 | return driver_register(drv); | |
1157 | } | |
1158 | EXPORT_SYMBOL(scsi_register_driver); | |
1159 | ||
1160 | int scsi_register_interface(struct class_interface *intf) | |
1161 | { | |
1162 | intf->class = &sdev_class; | |
1163 | ||
1164 | return class_interface_register(intf); | |
1165 | } | |
1166 | EXPORT_SYMBOL(scsi_register_interface); | |
1167 | ||
1da177e4 LT |
1168 | /** |
1169 | * scsi_sysfs_add_host - add scsi host to subsystem | |
1170 | * @shost: scsi host struct to add to subsystem | |
1da177e4 LT |
1171 | **/ |
1172 | int scsi_sysfs_add_host(struct Scsi_Host *shost) | |
1173 | { | |
1174 | int error, i; | |
1175 | ||
f7120a4f | 1176 | /* add host specific attributes */ |
1da177e4 LT |
1177 | if (shost->hostt->shost_attrs) { |
1178 | for (i = 0; shost->hostt->shost_attrs[i]; i++) { | |
ee959b00 | 1179 | error = device_create_file(&shost->shost_dev, |
f7120a4f | 1180 | shost->hostt->shost_attrs[i]); |
1da177e4 LT |
1181 | if (error) |
1182 | return error; | |
1183 | } | |
1184 | } | |
1185 | ||
1186 | transport_register_device(&shost->shost_gendev); | |
d52b3815 | 1187 | transport_configure_device(&shost->shost_gendev); |
1da177e4 LT |
1188 | return 0; |
1189 | } | |
1190 | ||
bfd12944 KS |
1191 | static struct device_type scsi_dev_type = { |
1192 | .name = "scsi_device", | |
1193 | .release = scsi_device_dev_release, | |
1194 | .groups = scsi_sdev_attr_groups, | |
1195 | }; | |
1196 | ||
1da177e4 LT |
1197 | void scsi_sysfs_device_initialize(struct scsi_device *sdev) |
1198 | { | |
1199 | unsigned long flags; | |
1200 | struct Scsi_Host *shost = sdev->host; | |
1201 | struct scsi_target *starget = sdev->sdev_target; | |
1202 | ||
1203 | device_initialize(&sdev->sdev_gendev); | |
1204 | sdev->sdev_gendev.bus = &scsi_bus_type; | |
bfd12944 | 1205 | sdev->sdev_gendev.type = &scsi_dev_type; |
71610f55 KS |
1206 | dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%d", |
1207 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); | |
1208 | ||
ee959b00 | 1209 | device_initialize(&sdev->sdev_dev); |
37e6ba00 | 1210 | sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev); |
ee959b00 | 1211 | sdev->sdev_dev.class = &sdev_class; |
71610f55 KS |
1212 | dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%d", |
1213 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); | |
7c9d6f16 | 1214 | sdev->scsi_level = starget->scsi_level; |
1da177e4 LT |
1215 | transport_setup_device(&sdev->sdev_gendev); |
1216 | spin_lock_irqsave(shost->host_lock, flags); | |
1217 | list_add_tail(&sdev->same_target_siblings, &starget->devices); | |
1218 | list_add_tail(&sdev->siblings, &shost->__devices); | |
1219 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1220 | } | |
1221 | ||
1222 | int scsi_is_sdev_device(const struct device *dev) | |
1223 | { | |
13ba9bcb | 1224 | return dev->type == &scsi_dev_type; |
1da177e4 LT |
1225 | } |
1226 | EXPORT_SYMBOL(scsi_is_sdev_device); | |
1227 | ||
1228 | /* A blank transport template that is used in drivers that don't | |
1229 | * yet implement Transport Attributes */ | |
1230 | struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |