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Commit | Line | Data |
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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 | ||
290 | return sprintf(buf, "%d\n", shost->eh_deadline / HZ); | |
291 | } | |
292 | ||
293 | static ssize_t | |
294 | store_shost_eh_deadline(struct device *dev, struct device_attribute *attr, | |
295 | const char *buf, size_t count) | |
296 | { | |
297 | struct Scsi_Host *shost = class_to_shost(dev); | |
298 | int ret = -EINVAL; | |
299 | int deadline; | |
300 | unsigned long flags; | |
301 | ||
302 | if (shost->transportt && shost->transportt->eh_strategy_handler) | |
303 | return ret; | |
304 | ||
305 | if (sscanf(buf, "%d\n", &deadline) == 1) { | |
306 | spin_lock_irqsave(shost->host_lock, flags); | |
307 | if (scsi_host_in_recovery(shost)) | |
308 | ret = -EBUSY; | |
309 | else { | |
310 | shost->eh_deadline = deadline * HZ; | |
311 | ret = count; | |
312 | } | |
313 | spin_unlock_irqrestore(shost->host_lock, flags); | |
314 | } | |
315 | return ret; | |
316 | } | |
317 | ||
318 | static DEVICE_ATTR(eh_deadline, S_IRUGO | S_IWUSR, show_shost_eh_deadline, store_shost_eh_deadline); | |
319 | ||
1da177e4 LT |
320 | shost_rd_attr(unique_id, "%u\n"); |
321 | shost_rd_attr(host_busy, "%hu\n"); | |
322 | shost_rd_attr(cmd_per_lun, "%hd\n"); | |
ed632da8 | 323 | shost_rd_attr(can_queue, "%hd\n"); |
1da177e4 | 324 | shost_rd_attr(sg_tablesize, "%hu\n"); |
13f05c8d | 325 | shost_rd_attr(sg_prot_tablesize, "%hu\n"); |
1da177e4 | 326 | shost_rd_attr(unchecked_isa_dma, "%d\n"); |
4469f987 MP |
327 | shost_rd_attr(prot_capabilities, "%u\n"); |
328 | shost_rd_attr(prot_guard_type, "%hd\n"); | |
1da177e4 LT |
329 | shost_rd_attr2(proc_name, hostt->proc_name, "%s\n"); |
330 | ||
f7120a4f HR |
331 | static struct attribute *scsi_sysfs_shost_attrs[] = { |
332 | &dev_attr_unique_id.attr, | |
333 | &dev_attr_host_busy.attr, | |
334 | &dev_attr_cmd_per_lun.attr, | |
335 | &dev_attr_can_queue.attr, | |
336 | &dev_attr_sg_tablesize.attr, | |
13f05c8d | 337 | &dev_attr_sg_prot_tablesize.attr, |
f7120a4f HR |
338 | &dev_attr_unchecked_isa_dma.attr, |
339 | &dev_attr_proc_name.attr, | |
340 | &dev_attr_scan.attr, | |
341 | &dev_attr_hstate.attr, | |
342 | &dev_attr_supported_mode.attr, | |
343 | &dev_attr_active_mode.attr, | |
4469f987 MP |
344 | &dev_attr_prot_capabilities.attr, |
345 | &dev_attr_prot_guard_type.attr, | |
29443691 | 346 | &dev_attr_host_reset.attr, |
b4562022 | 347 | &dev_attr_eh_deadline.attr, |
f7120a4f HR |
348 | NULL |
349 | }; | |
350 | ||
351 | struct attribute_group scsi_shost_attr_group = { | |
352 | .attrs = scsi_sysfs_shost_attrs, | |
353 | }; | |
354 | ||
a4dbd674 | 355 | const struct attribute_group *scsi_sysfs_shost_attr_groups[] = { |
f7120a4f | 356 | &scsi_shost_attr_group, |
1da177e4 LT |
357 | NULL |
358 | }; | |
359 | ||
ee959b00 | 360 | static void scsi_device_cls_release(struct device *class_dev) |
1da177e4 LT |
361 | { |
362 | struct scsi_device *sdev; | |
363 | ||
364 | sdev = class_to_sdev(class_dev); | |
365 | put_device(&sdev->sdev_gendev); | |
366 | } | |
367 | ||
65f27f38 | 368 | static void scsi_device_dev_release_usercontext(struct work_struct *work) |
1da177e4 LT |
369 | { |
370 | struct scsi_device *sdev; | |
371 | struct device *parent; | |
372 | struct scsi_target *starget; | |
a341cd0f | 373 | struct list_head *this, *tmp; |
1da177e4 LT |
374 | unsigned long flags; |
375 | ||
65f27f38 DH |
376 | sdev = container_of(work, struct scsi_device, ew.work); |
377 | ||
378 | parent = sdev->sdev_gendev.parent; | |
1da177e4 LT |
379 | starget = to_scsi_target(parent); |
380 | ||
381 | spin_lock_irqsave(sdev->host->host_lock, flags); | |
382 | starget->reap_ref++; | |
383 | list_del(&sdev->siblings); | |
384 | list_del(&sdev->same_target_siblings); | |
385 | list_del(&sdev->starved_entry); | |
386 | spin_unlock_irqrestore(sdev->host->host_lock, flags); | |
387 | ||
a341cd0f JG |
388 | cancel_work_sync(&sdev->event_work); |
389 | ||
390 | list_for_each_safe(this, tmp, &sdev->event_list) { | |
391 | struct scsi_event *evt; | |
392 | ||
393 | evt = list_entry(this, struct scsi_event, node); | |
394 | list_del(&evt->node); | |
395 | kfree(evt); | |
396 | } | |
397 | ||
e73e079b | 398 | blk_put_queue(sdev->request_queue); |
86cbfb56 JB |
399 | /* NULL queue means the device can't be used */ |
400 | sdev->request_queue = NULL; | |
1da177e4 LT |
401 | |
402 | scsi_target_reap(scsi_target(sdev)); | |
403 | ||
404 | kfree(sdev->inquiry); | |
405 | kfree(sdev); | |
406 | ||
407 | if (parent) | |
408 | put_device(parent); | |
409 | } | |
410 | ||
65110b21 JB |
411 | static void scsi_device_dev_release(struct device *dev) |
412 | { | |
ffedb452 | 413 | struct scsi_device *sdp = to_scsi_device(dev); |
65f27f38 | 414 | execute_in_process_context(scsi_device_dev_release_usercontext, |
ffedb452 | 415 | &sdp->ew); |
65110b21 JB |
416 | } |
417 | ||
52c1da39 | 418 | static struct class sdev_class = { |
1da177e4 | 419 | .name = "scsi_device", |
ee959b00 | 420 | .dev_release = scsi_device_cls_release, |
1da177e4 LT |
421 | }; |
422 | ||
423 | /* all probing is done in the individual ->probe routines */ | |
424 | static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) | |
425 | { | |
b0ed4336 HR |
426 | struct scsi_device *sdp; |
427 | ||
428 | if (dev->type != &scsi_dev_type) | |
429 | return 0; | |
430 | ||
431 | sdp = to_scsi_device(dev); | |
1da177e4 LT |
432 | if (sdp->no_uld_attach) |
433 | return 0; | |
434 | return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; | |
435 | } | |
436 | ||
7eff2e7a | 437 | static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
d7b8bcb0 | 438 | { |
1f42ea7b JB |
439 | struct scsi_device *sdev; |
440 | ||
441 | if (dev->type != &scsi_dev_type) | |
442 | return 0; | |
443 | ||
444 | sdev = to_scsi_device(dev); | |
d7b8bcb0 | 445 | |
7eff2e7a | 446 | add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type); |
d7b8bcb0 MT |
447 | return 0; |
448 | } | |
449 | ||
1da177e4 LT |
450 | struct bus_type scsi_bus_type = { |
451 | .name = "scsi", | |
452 | .match = scsi_bus_match, | |
d7b8bcb0 | 453 | .uevent = scsi_bus_uevent, |
aa338601 | 454 | #ifdef CONFIG_PM |
db5bd1e0 | 455 | .pm = &scsi_bus_pm_ops, |
e6da54d8 | 456 | #endif |
1da177e4 | 457 | }; |
a6a8d9f8 | 458 | EXPORT_SYMBOL_GPL(scsi_bus_type); |
1da177e4 LT |
459 | |
460 | int scsi_sysfs_register(void) | |
461 | { | |
462 | int error; | |
463 | ||
464 | error = bus_register(&scsi_bus_type); | |
465 | if (!error) { | |
466 | error = class_register(&sdev_class); | |
467 | if (error) | |
468 | bus_unregister(&scsi_bus_type); | |
469 | } | |
470 | ||
471 | return error; | |
472 | } | |
473 | ||
474 | void scsi_sysfs_unregister(void) | |
475 | { | |
476 | class_unregister(&sdev_class); | |
477 | bus_unregister(&scsi_bus_type); | |
478 | } | |
479 | ||
480 | /* | |
481 | * sdev_show_function: macro to create an attr function that can be used to | |
482 | * show a non-bit field. | |
483 | */ | |
484 | #define sdev_show_function(field, format_string) \ | |
485 | static ssize_t \ | |
ee959b00 TJ |
486 | sdev_show_##field (struct device *dev, struct device_attribute *attr, \ |
487 | char *buf) \ | |
1da177e4 LT |
488 | { \ |
489 | struct scsi_device *sdev; \ | |
490 | sdev = to_scsi_device(dev); \ | |
491 | return snprintf (buf, 20, format_string, sdev->field); \ | |
492 | } \ | |
493 | ||
494 | /* | |
495 | * sdev_rd_attr: macro to create a function and attribute variable for a | |
496 | * read only field. | |
497 | */ | |
498 | #define sdev_rd_attr(field, format_string) \ | |
499 | sdev_show_function(field, format_string) \ | |
500 | static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); | |
501 | ||
502 | ||
503 | /* | |
160e7f67 | 504 | * sdev_rw_attr: create a function and attribute variable for a |
1da177e4 LT |
505 | * read/write field. |
506 | */ | |
507 | #define sdev_rw_attr(field, format_string) \ | |
508 | sdev_show_function(field, format_string) \ | |
509 | \ | |
510 | static ssize_t \ | |
ee959b00 TJ |
511 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
512 | const char *buf, size_t count) \ | |
1da177e4 LT |
513 | { \ |
514 | struct scsi_device *sdev; \ | |
515 | sdev = to_scsi_device(dev); \ | |
160e7f67 | 516 | sscanf (buf, format_string, &sdev->field); \ |
1da177e4 LT |
517 | return count; \ |
518 | } \ | |
519 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
520 | ||
521 | /* Currently we don't export bit fields, but we might in future, | |
522 | * so leave this code in */ | |
523 | #if 0 | |
524 | /* | |
525 | * sdev_rd_attr: create a function and attribute variable for a | |
526 | * read/write bit field. | |
527 | */ | |
528 | #define sdev_rw_attr_bit(field) \ | |
529 | sdev_show_function(field, "%d\n") \ | |
530 | \ | |
531 | static ssize_t \ | |
ee959b00 TJ |
532 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
533 | const char *buf, size_t count) \ | |
1da177e4 LT |
534 | { \ |
535 | int ret; \ | |
536 | struct scsi_device *sdev; \ | |
537 | ret = scsi_sdev_check_buf_bit(buf); \ | |
538 | if (ret >= 0) { \ | |
539 | sdev = to_scsi_device(dev); \ | |
540 | sdev->field = ret; \ | |
541 | ret = count; \ | |
542 | } \ | |
543 | return ret; \ | |
544 | } \ | |
545 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
546 | ||
547 | /* | |
548 | * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", | |
549 | * else return -EINVAL. | |
550 | */ | |
551 | static int scsi_sdev_check_buf_bit(const char *buf) | |
552 | { | |
553 | if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { | |
554 | if (buf[0] == '1') | |
555 | return 1; | |
556 | else if (buf[0] == '0') | |
557 | return 0; | |
558 | else | |
559 | return -EINVAL; | |
560 | } else | |
561 | return -EINVAL; | |
562 | } | |
563 | #endif | |
564 | /* | |
565 | * Create the actual show/store functions and data structures. | |
566 | */ | |
567 | sdev_rd_attr (device_blocked, "%d\n"); | |
568 | sdev_rd_attr (queue_depth, "%d\n"); | |
522db3c9 | 569 | sdev_rd_attr (device_busy, "%d\n"); |
1da177e4 LT |
570 | sdev_rd_attr (type, "%d\n"); |
571 | sdev_rd_attr (scsi_level, "%d\n"); | |
572 | sdev_rd_attr (vendor, "%.8s\n"); | |
573 | sdev_rd_attr (model, "%.16s\n"); | |
574 | sdev_rd_attr (rev, "%.4s\n"); | |
575 | ||
242f9dcb JA |
576 | /* |
577 | * TODO: can we make these symlinks to the block layer ones? | |
578 | */ | |
1da177e4 | 579 | static ssize_t |
10523b3b | 580 | sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
581 | { |
582 | struct scsi_device *sdev; | |
583 | sdev = to_scsi_device(dev); | |
242f9dcb | 584 | return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ); |
1da177e4 LT |
585 | } |
586 | ||
587 | static ssize_t | |
ee959b00 TJ |
588 | sdev_store_timeout (struct device *dev, struct device_attribute *attr, |
589 | const char *buf, size_t count) | |
1da177e4 LT |
590 | { |
591 | struct scsi_device *sdev; | |
592 | int timeout; | |
593 | sdev = to_scsi_device(dev); | |
594 | sscanf (buf, "%d\n", &timeout); | |
242f9dcb | 595 | blk_queue_rq_timeout(sdev->request_queue, timeout * HZ); |
1da177e4 LT |
596 | return count; |
597 | } | |
598 | static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); | |
599 | ||
0816c925 MP |
600 | static ssize_t |
601 | sdev_show_eh_timeout(struct device *dev, struct device_attribute *attr, char *buf) | |
602 | { | |
603 | struct scsi_device *sdev; | |
604 | sdev = to_scsi_device(dev); | |
605 | return snprintf(buf, 20, "%u\n", sdev->eh_timeout / HZ); | |
606 | } | |
607 | ||
608 | static ssize_t | |
609 | sdev_store_eh_timeout(struct device *dev, struct device_attribute *attr, | |
610 | const char *buf, size_t count) | |
611 | { | |
612 | struct scsi_device *sdev; | |
613 | unsigned int eh_timeout; | |
614 | int err; | |
615 | ||
616 | if (!capable(CAP_SYS_ADMIN)) | |
617 | return -EACCES; | |
618 | ||
619 | sdev = to_scsi_device(dev); | |
620 | err = kstrtouint(buf, 10, &eh_timeout); | |
621 | if (err) | |
622 | return err; | |
623 | sdev->eh_timeout = eh_timeout * HZ; | |
624 | ||
625 | return count; | |
626 | } | |
627 | static DEVICE_ATTR(eh_timeout, S_IRUGO | S_IWUSR, sdev_show_eh_timeout, sdev_store_eh_timeout); | |
628 | ||
1da177e4 | 629 | static ssize_t |
ee959b00 TJ |
630 | store_rescan_field (struct device *dev, struct device_attribute *attr, |
631 | const char *buf, size_t count) | |
1da177e4 LT |
632 | { |
633 | scsi_rescan_device(dev); | |
634 | return count; | |
635 | } | |
636 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); | |
637 | ||
d9a9cdfb AS |
638 | static void sdev_store_delete_callback(struct device *dev) |
639 | { | |
640 | scsi_remove_device(to_scsi_device(dev)); | |
641 | } | |
642 | ||
ee959b00 TJ |
643 | static ssize_t |
644 | sdev_store_delete(struct device *dev, struct device_attribute *attr, | |
645 | const char *buf, size_t count) | |
1da177e4 | 646 | { |
d9a9cdfb AS |
647 | int rc; |
648 | ||
649 | /* An attribute cannot be unregistered by one of its own methods, | |
650 | * so we have to use this roundabout approach. | |
651 | */ | |
652 | rc = device_schedule_callback(dev, sdev_store_delete_callback); | |
653 | if (rc) | |
654 | count = rc; | |
1da177e4 LT |
655 | return count; |
656 | }; | |
657 | static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); | |
658 | ||
659 | static ssize_t | |
ee959b00 TJ |
660 | store_state_field(struct device *dev, struct device_attribute *attr, |
661 | const char *buf, size_t count) | |
1da177e4 LT |
662 | { |
663 | int i; | |
664 | struct scsi_device *sdev = to_scsi_device(dev); | |
665 | enum scsi_device_state state = 0; | |
666 | ||
6391a113 | 667 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
668 | const int len = strlen(sdev_states[i].name); |
669 | if (strncmp(sdev_states[i].name, buf, len) == 0 && | |
670 | buf[len] == '\n') { | |
671 | state = sdev_states[i].value; | |
672 | break; | |
673 | } | |
674 | } | |
675 | if (!state) | |
676 | return -EINVAL; | |
677 | ||
678 | if (scsi_device_set_state(sdev, state)) | |
679 | return -EINVAL; | |
680 | return count; | |
681 | } | |
682 | ||
683 | static ssize_t | |
10523b3b | 684 | show_state_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
685 | { |
686 | struct scsi_device *sdev = to_scsi_device(dev); | |
687 | const char *name = scsi_device_state_name(sdev->sdev_state); | |
688 | ||
689 | if (!name) | |
690 | return -EINVAL; | |
691 | ||
692 | return snprintf(buf, 20, "%s\n", name); | |
693 | } | |
694 | ||
695 | static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); | |
696 | ||
697 | static ssize_t | |
ee959b00 TJ |
698 | show_queue_type_field(struct device *dev, struct device_attribute *attr, |
699 | char *buf) | |
1da177e4 LT |
700 | { |
701 | struct scsi_device *sdev = to_scsi_device(dev); | |
702 | const char *name = "none"; | |
703 | ||
704 | if (sdev->ordered_tags) | |
705 | name = "ordered"; | |
706 | else if (sdev->simple_tags) | |
707 | name = "simple"; | |
708 | ||
709 | return snprintf(buf, 20, "%s\n", name); | |
710 | } | |
711 | ||
712 | static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL); | |
713 | ||
714 | static ssize_t | |
ee959b00 | 715 | show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
716 | { |
717 | return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); | |
718 | } | |
719 | ||
720 | static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); | |
721 | ||
722 | #define show_sdev_iostat(field) \ | |
723 | static ssize_t \ | |
ee959b00 TJ |
724 | show_iostat_##field(struct device *dev, struct device_attribute *attr, \ |
725 | char *buf) \ | |
1da177e4 LT |
726 | { \ |
727 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
728 | unsigned long long count = atomic_read(&sdev->field); \ | |
729 | return snprintf(buf, 20, "0x%llx\n", count); \ | |
730 | } \ | |
731 | static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) | |
732 | ||
733 | show_sdev_iostat(iorequest_cnt); | |
734 | show_sdev_iostat(iodone_cnt); | |
735 | show_sdev_iostat(ioerr_cnt); | |
736 | ||
d7b8bcb0 MT |
737 | static ssize_t |
738 | sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf) | |
739 | { | |
740 | struct scsi_device *sdev; | |
741 | sdev = to_scsi_device(dev); | |
742 | return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type); | |
743 | } | |
744 | static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL); | |
1da177e4 | 745 | |
a341cd0f JG |
746 | #define DECLARE_EVT_SHOW(name, Cap_name) \ |
747 | static ssize_t \ | |
748 | sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \ | |
ee959b00 | 749 | char *buf) \ |
a341cd0f JG |
750 | { \ |
751 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
752 | int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\ | |
753 | return snprintf(buf, 20, "%d\n", val); \ | |
754 | } | |
755 | ||
756 | #define DECLARE_EVT_STORE(name, Cap_name) \ | |
757 | static ssize_t \ | |
ee959b00 | 758 | sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\ |
a341cd0f JG |
759 | const char *buf, size_t count) \ |
760 | { \ | |
761 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
762 | int val = simple_strtoul(buf, NULL, 0); \ | |
763 | if (val == 0) \ | |
764 | clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
765 | else if (val == 1) \ | |
766 | set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
767 | else \ | |
768 | return -EINVAL; \ | |
769 | return count; \ | |
770 | } | |
771 | ||
772 | #define DECLARE_EVT(name, Cap_name) \ | |
773 | DECLARE_EVT_SHOW(name, Cap_name) \ | |
774 | DECLARE_EVT_STORE(name, Cap_name) \ | |
775 | static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \ | |
776 | sdev_store_evt_##name); | |
777 | #define REF_EVT(name) &dev_attr_evt_##name.attr | |
778 | ||
779 | DECLARE_EVT(media_change, MEDIA_CHANGE) | |
279afdfe EM |
780 | DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED) |
781 | DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED) | |
782 | DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED) | |
783 | DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED) | |
784 | DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED) | |
a341cd0f | 785 | |
1da177e4 | 786 | /* Default template for device attributes. May NOT be modified */ |
bfd12944 KS |
787 | static struct attribute *scsi_sdev_attrs[] = { |
788 | &dev_attr_device_blocked.attr, | |
789 | &dev_attr_type.attr, | |
790 | &dev_attr_scsi_level.attr, | |
522db3c9 | 791 | &dev_attr_device_busy.attr, |
bfd12944 KS |
792 | &dev_attr_vendor.attr, |
793 | &dev_attr_model.attr, | |
794 | &dev_attr_rev.attr, | |
795 | &dev_attr_rescan.attr, | |
796 | &dev_attr_delete.attr, | |
797 | &dev_attr_state.attr, | |
798 | &dev_attr_timeout.attr, | |
0816c925 | 799 | &dev_attr_eh_timeout.attr, |
bfd12944 KS |
800 | &dev_attr_iocounterbits.attr, |
801 | &dev_attr_iorequest_cnt.attr, | |
802 | &dev_attr_iodone_cnt.attr, | |
803 | &dev_attr_ioerr_cnt.attr, | |
804 | &dev_attr_modalias.attr, | |
a341cd0f | 805 | REF_EVT(media_change), |
279afdfe EM |
806 | REF_EVT(inquiry_change_reported), |
807 | REF_EVT(capacity_change_reported), | |
808 | REF_EVT(soft_threshold_reached), | |
809 | REF_EVT(mode_parameter_change_reported), | |
810 | REF_EVT(lun_change_reported), | |
bfd12944 KS |
811 | NULL |
812 | }; | |
813 | ||
814 | static struct attribute_group scsi_sdev_attr_group = { | |
815 | .attrs = scsi_sdev_attrs, | |
816 | }; | |
817 | ||
a4dbd674 | 818 | static const struct attribute_group *scsi_sdev_attr_groups[] = { |
bfd12944 | 819 | &scsi_sdev_attr_group, |
1da177e4 LT |
820 | NULL |
821 | }; | |
822 | ||
ee959b00 TJ |
823 | static ssize_t |
824 | sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr, | |
825 | const char *buf, size_t count) | |
1da177e4 LT |
826 | { |
827 | int depth, retval; | |
828 | struct scsi_device *sdev = to_scsi_device(dev); | |
829 | struct scsi_host_template *sht = sdev->host->hostt; | |
830 | ||
831 | if (!sht->change_queue_depth) | |
832 | return -EINVAL; | |
833 | ||
834 | depth = simple_strtoul(buf, NULL, 0); | |
835 | ||
836 | if (depth < 1) | |
837 | return -EINVAL; | |
838 | ||
e881a172 MC |
839 | retval = sht->change_queue_depth(sdev, depth, |
840 | SCSI_QDEPTH_DEFAULT); | |
1da177e4 LT |
841 | if (retval < 0) |
842 | return retval; | |
843 | ||
4a84067d VD |
844 | sdev->max_queue_depth = sdev->queue_depth; |
845 | ||
1da177e4 LT |
846 | return count; |
847 | } | |
848 | ||
849 | static struct device_attribute sdev_attr_queue_depth_rw = | |
850 | __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, | |
851 | sdev_store_queue_depth_rw); | |
852 | ||
4a84067d VD |
853 | static ssize_t |
854 | sdev_show_queue_ramp_up_period(struct device *dev, | |
855 | struct device_attribute *attr, | |
856 | char *buf) | |
857 | { | |
858 | struct scsi_device *sdev; | |
859 | sdev = to_scsi_device(dev); | |
860 | return snprintf(buf, 20, "%u\n", | |
861 | jiffies_to_msecs(sdev->queue_ramp_up_period)); | |
862 | } | |
863 | ||
864 | static ssize_t | |
865 | sdev_store_queue_ramp_up_period(struct device *dev, | |
866 | struct device_attribute *attr, | |
867 | const char *buf, size_t count) | |
868 | { | |
869 | struct scsi_device *sdev = to_scsi_device(dev); | |
870 | unsigned long period; | |
871 | ||
872 | if (strict_strtoul(buf, 10, &period)) | |
873 | return -EINVAL; | |
874 | ||
875 | sdev->queue_ramp_up_period = msecs_to_jiffies(period); | |
876 | return period; | |
877 | } | |
878 | ||
879 | static struct device_attribute sdev_attr_queue_ramp_up_period = | |
880 | __ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR, | |
881 | sdev_show_queue_ramp_up_period, | |
882 | sdev_store_queue_ramp_up_period); | |
883 | ||
ee959b00 TJ |
884 | static ssize_t |
885 | sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr, | |
886 | const char *buf, size_t count) | |
1da177e4 LT |
887 | { |
888 | struct scsi_device *sdev = to_scsi_device(dev); | |
889 | struct scsi_host_template *sht = sdev->host->hostt; | |
890 | int tag_type = 0, retval; | |
891 | int prev_tag_type = scsi_get_tag_type(sdev); | |
892 | ||
893 | if (!sdev->tagged_supported || !sht->change_queue_type) | |
894 | return -EINVAL; | |
895 | ||
896 | if (strncmp(buf, "ordered", 7) == 0) | |
897 | tag_type = MSG_ORDERED_TAG; | |
898 | else if (strncmp(buf, "simple", 6) == 0) | |
899 | tag_type = MSG_SIMPLE_TAG; | |
900 | else if (strncmp(buf, "none", 4) != 0) | |
901 | return -EINVAL; | |
902 | ||
903 | if (tag_type == prev_tag_type) | |
904 | return count; | |
905 | ||
906 | retval = sht->change_queue_type(sdev, tag_type); | |
907 | if (retval < 0) | |
908 | return retval; | |
909 | ||
910 | return count; | |
911 | } | |
912 | ||
643eb2d9 JB |
913 | static int scsi_target_add(struct scsi_target *starget) |
914 | { | |
915 | int error; | |
916 | ||
917 | if (starget->state != STARGET_CREATED) | |
918 | return 0; | |
919 | ||
920 | error = device_add(&starget->dev); | |
921 | if (error) { | |
922 | dev_err(&starget->dev, "target device_add failed, error %d\n", error); | |
643eb2d9 JB |
923 | return error; |
924 | } | |
925 | transport_add_device(&starget->dev); | |
926 | starget->state = STARGET_RUNNING; | |
927 | ||
bc4f2401 AS |
928 | pm_runtime_set_active(&starget->dev); |
929 | pm_runtime_enable(&starget->dev); | |
930 | device_enable_async_suspend(&starget->dev); | |
931 | ||
643eb2d9 JB |
932 | return 0; |
933 | } | |
934 | ||
1da177e4 LT |
935 | static struct device_attribute sdev_attr_queue_type_rw = |
936 | __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, | |
937 | sdev_store_queue_type_rw); | |
938 | ||
1da177e4 LT |
939 | /** |
940 | * scsi_sysfs_add_sdev - add scsi device to sysfs | |
941 | * @sdev: scsi_device to add | |
942 | * | |
943 | * Return value: | |
944 | * 0 on Success / non-zero on Failure | |
945 | **/ | |
946 | int scsi_sysfs_add_sdev(struct scsi_device *sdev) | |
947 | { | |
948 | int error, i; | |
80ed71ce | 949 | struct request_queue *rq = sdev->request_queue; |
643eb2d9 | 950 | struct scsi_target *starget = sdev->sdev_target; |
1da177e4 | 951 | |
ee37e09d AS |
952 | error = scsi_device_set_state(sdev, SDEV_RUNNING); |
953 | if (error) | |
1da177e4 LT |
954 | return error; |
955 | ||
643eb2d9 JB |
956 | error = scsi_target_add(starget); |
957 | if (error) | |
958 | return error; | |
959 | ||
960 | transport_configure_device(&starget->dev); | |
bc4f2401 | 961 | |
4cb077d9 | 962 | device_enable_async_suspend(&sdev->sdev_gendev); |
bc4f2401 AS |
963 | scsi_autopm_get_target(starget); |
964 | pm_runtime_set_active(&sdev->sdev_gendev); | |
965 | pm_runtime_forbid(&sdev->sdev_gendev); | |
966 | pm_runtime_enable(&sdev->sdev_gendev); | |
967 | scsi_autopm_put_target(starget); | |
968 | ||
969 | /* The following call will keep sdev active indefinitely, until | |
970 | * its driver does a corresponding scsi_autopm_pm_device(). Only | |
971 | * drivers supporting autosuspend will do this. | |
972 | */ | |
973 | scsi_autopm_get_device(sdev); | |
974 | ||
1da177e4 LT |
975 | error = device_add(&sdev->sdev_gendev); |
976 | if (error) { | |
73d8c34f AS |
977 | sdev_printk(KERN_INFO, sdev, |
978 | "failed to add device: %d\n", error); | |
ee37e09d | 979 | return error; |
1da177e4 | 980 | } |
4cb077d9 | 981 | device_enable_async_suspend(&sdev->sdev_dev); |
ee959b00 | 982 | error = device_add(&sdev->sdev_dev); |
1da177e4 | 983 | if (error) { |
73d8c34f AS |
984 | sdev_printk(KERN_INFO, sdev, |
985 | "failed to add class device: %d\n", error); | |
860dc736 | 986 | device_del(&sdev->sdev_gendev); |
ee37e09d | 987 | return error; |
1da177e4 | 988 | } |
860dc736 JB |
989 | transport_add_device(&sdev->sdev_gendev); |
990 | sdev->is_visible = 1; | |
1da177e4 | 991 | |
bfd12944 | 992 | /* create queue files, which may be writable, depending on the host */ |
4a84067d VD |
993 | if (sdev->host->hostt->change_queue_depth) { |
994 | error = device_create_file(&sdev->sdev_gendev, | |
995 | &sdev_attr_queue_depth_rw); | |
996 | error = device_create_file(&sdev->sdev_gendev, | |
997 | &sdev_attr_queue_ramp_up_period); | |
998 | } | |
bfd12944 KS |
999 | else |
1000 | error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_depth); | |
860dc736 | 1001 | if (error) |
ee37e09d | 1002 | return error; |
860dc736 | 1003 | |
bfd12944 KS |
1004 | if (sdev->host->hostt->change_queue_type) |
1005 | error = device_create_file(&sdev->sdev_gendev, &sdev_attr_queue_type_rw); | |
1006 | else | |
1007 | error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_type); | |
860dc736 | 1008 | if (error) |
ee37e09d | 1009 | return error; |
bfd12944 | 1010 | |
97f46ae4 | 1011 | error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL); |
80ed71ce JB |
1012 | |
1013 | if (error) | |
860dc736 JB |
1014 | /* we're treating error on bsg register as non-fatal, |
1015 | * so pretend nothing went wrong */ | |
80ed71ce JB |
1016 | sdev_printk(KERN_INFO, sdev, |
1017 | "Failed to register bsg queue, errno=%d\n", error); | |
1018 | ||
bfd12944 | 1019 | /* add additional host specific attributes */ |
1da177e4 LT |
1020 | if (sdev->host->hostt->sdev_attrs) { |
1021 | for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { | |
bfd12944 | 1022 | error = device_create_file(&sdev->sdev_gendev, |
1da177e4 | 1023 | sdev->host->hostt->sdev_attrs[i]); |
860dc736 | 1024 | if (error) |
ee37e09d | 1025 | return error; |
1da177e4 LT |
1026 | } |
1027 | } | |
1da177e4 | 1028 | |
1da177e4 LT |
1029 | return error; |
1030 | } | |
1031 | ||
903f4fed | 1032 | void __scsi_remove_device(struct scsi_device *sdev) |
1da177e4 | 1033 | { |
df133c21 JB |
1034 | struct device *dev = &sdev->sdev_gendev; |
1035 | ||
860dc736 JB |
1036 | if (sdev->is_visible) { |
1037 | if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0) | |
1038 | return; | |
1da177e4 | 1039 | |
860dc736 JB |
1040 | bsg_unregister_queue(sdev->request_queue); |
1041 | device_unregister(&sdev->sdev_dev); | |
1042 | transport_remove_device(dev); | |
1043 | device_del(dev); | |
1044 | } else | |
1045 | put_device(&sdev->sdev_dev); | |
b485462a BVA |
1046 | |
1047 | /* | |
1048 | * Stop accepting new requests and wait until all queuecommand() and | |
1049 | * scsi_run_queue() invocations have finished before tearing down the | |
1050 | * device. | |
1051 | */ | |
1da177e4 | 1052 | scsi_device_set_state(sdev, SDEV_DEL); |
b485462a BVA |
1053 | blk_cleanup_queue(sdev->request_queue); |
1054 | cancel_work_sync(&sdev->requeue_work); | |
1055 | ||
1da177e4 LT |
1056 | if (sdev->host->hostt->slave_destroy) |
1057 | sdev->host->hostt->slave_destroy(sdev); | |
df133c21 | 1058 | transport_destroy_device(dev); |
86cbfb56 | 1059 | |
df133c21 | 1060 | put_device(dev); |
903f4fed AS |
1061 | } |
1062 | ||
1063 | /** | |
1064 | * scsi_remove_device - unregister a device from the scsi bus | |
1065 | * @sdev: scsi_device to unregister | |
1066 | **/ | |
1067 | void scsi_remove_device(struct scsi_device *sdev) | |
1068 | { | |
54195002 AS |
1069 | struct Scsi_Host *shost = sdev->host; |
1070 | ||
0b950672 | 1071 | mutex_lock(&shost->scan_mutex); |
903f4fed | 1072 | __scsi_remove_device(sdev); |
0b950672 | 1073 | mutex_unlock(&shost->scan_mutex); |
1da177e4 LT |
1074 | } |
1075 | EXPORT_SYMBOL(scsi_remove_device); | |
1076 | ||
44818efb | 1077 | static void __scsi_remove_target(struct scsi_target *starget) |
1da177e4 LT |
1078 | { |
1079 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
1080 | unsigned long flags; | |
a64358db | 1081 | struct scsi_device *sdev; |
1da177e4 LT |
1082 | |
1083 | spin_lock_irqsave(shost->host_lock, flags); | |
a64358db AS |
1084 | restart: |
1085 | list_for_each_entry(sdev, &shost->__devices, siblings) { | |
1da177e4 | 1086 | if (sdev->channel != starget->channel || |
a64358db | 1087 | sdev->id != starget->id || |
546ae796 | 1088 | scsi_device_get(sdev)) |
1da177e4 LT |
1089 | continue; |
1090 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1091 | scsi_remove_device(sdev); | |
546ae796 | 1092 | scsi_device_put(sdev); |
1da177e4 | 1093 | spin_lock_irqsave(shost->host_lock, flags); |
a64358db | 1094 | goto restart; |
1da177e4 LT |
1095 | } |
1096 | spin_unlock_irqrestore(shost->host_lock, flags); | |
20b1e674 PM |
1097 | } |
1098 | ||
1da177e4 LT |
1099 | /** |
1100 | * scsi_remove_target - try to remove a target and all its devices | |
1101 | * @dev: generic starget or parent of generic stargets to be removed | |
1102 | * | |
1103 | * Note: This is slightly racy. It is possible that if the user | |
1104 | * requests the addition of another device then the target won't be | |
1105 | * removed. | |
1106 | */ | |
1107 | void scsi_remove_target(struct device *dev) | |
1108 | { | |
3b661a92 | 1109 | struct Scsi_Host *shost = dev_to_shost(dev->parent); |
bc3f02a7 | 1110 | struct scsi_target *starget, *last = NULL; |
3b661a92 DW |
1111 | unsigned long flags; |
1112 | ||
bc3f02a7 DW |
1113 | /* remove targets being careful to lookup next entry before |
1114 | * deleting the last | |
1115 | */ | |
3b661a92 DW |
1116 | spin_lock_irqsave(shost->host_lock, flags); |
1117 | list_for_each_entry(starget, &shost->__targets, siblings) { | |
1118 | if (starget->state == STARGET_DEL) | |
1119 | continue; | |
1120 | if (starget->dev.parent == dev || &starget->dev == dev) { | |
bc3f02a7 DW |
1121 | /* assuming new targets arrive at the end */ |
1122 | starget->reap_ref++; | |
1123 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1124 | if (last) | |
1125 | scsi_target_reap(last); | |
1126 | last = starget; | |
1127 | __scsi_remove_target(starget); | |
1128 | spin_lock_irqsave(shost->host_lock, flags); | |
3b661a92 | 1129 | } |
1da177e4 | 1130 | } |
3b661a92 | 1131 | spin_unlock_irqrestore(shost->host_lock, flags); |
1da177e4 | 1132 | |
bc3f02a7 DW |
1133 | if (last) |
1134 | scsi_target_reap(last); | |
1da177e4 LT |
1135 | } |
1136 | EXPORT_SYMBOL(scsi_remove_target); | |
1137 | ||
1138 | int scsi_register_driver(struct device_driver *drv) | |
1139 | { | |
1140 | drv->bus = &scsi_bus_type; | |
1141 | ||
1142 | return driver_register(drv); | |
1143 | } | |
1144 | EXPORT_SYMBOL(scsi_register_driver); | |
1145 | ||
1146 | int scsi_register_interface(struct class_interface *intf) | |
1147 | { | |
1148 | intf->class = &sdev_class; | |
1149 | ||
1150 | return class_interface_register(intf); | |
1151 | } | |
1152 | EXPORT_SYMBOL(scsi_register_interface); | |
1153 | ||
1da177e4 LT |
1154 | /** |
1155 | * scsi_sysfs_add_host - add scsi host to subsystem | |
1156 | * @shost: scsi host struct to add to subsystem | |
1da177e4 LT |
1157 | **/ |
1158 | int scsi_sysfs_add_host(struct Scsi_Host *shost) | |
1159 | { | |
1160 | int error, i; | |
1161 | ||
f7120a4f | 1162 | /* add host specific attributes */ |
1da177e4 LT |
1163 | if (shost->hostt->shost_attrs) { |
1164 | for (i = 0; shost->hostt->shost_attrs[i]; i++) { | |
ee959b00 | 1165 | error = device_create_file(&shost->shost_dev, |
f7120a4f | 1166 | shost->hostt->shost_attrs[i]); |
1da177e4 LT |
1167 | if (error) |
1168 | return error; | |
1169 | } | |
1170 | } | |
1171 | ||
1172 | transport_register_device(&shost->shost_gendev); | |
d52b3815 | 1173 | transport_configure_device(&shost->shost_gendev); |
1da177e4 LT |
1174 | return 0; |
1175 | } | |
1176 | ||
bfd12944 KS |
1177 | static struct device_type scsi_dev_type = { |
1178 | .name = "scsi_device", | |
1179 | .release = scsi_device_dev_release, | |
1180 | .groups = scsi_sdev_attr_groups, | |
1181 | }; | |
1182 | ||
1da177e4 LT |
1183 | void scsi_sysfs_device_initialize(struct scsi_device *sdev) |
1184 | { | |
1185 | unsigned long flags; | |
1186 | struct Scsi_Host *shost = sdev->host; | |
1187 | struct scsi_target *starget = sdev->sdev_target; | |
1188 | ||
1189 | device_initialize(&sdev->sdev_gendev); | |
1190 | sdev->sdev_gendev.bus = &scsi_bus_type; | |
bfd12944 | 1191 | sdev->sdev_gendev.type = &scsi_dev_type; |
71610f55 KS |
1192 | dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%d", |
1193 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); | |
1194 | ||
ee959b00 | 1195 | device_initialize(&sdev->sdev_dev); |
37e6ba00 | 1196 | sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev); |
ee959b00 | 1197 | sdev->sdev_dev.class = &sdev_class; |
71610f55 KS |
1198 | dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%d", |
1199 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); | |
7c9d6f16 | 1200 | sdev->scsi_level = starget->scsi_level; |
1da177e4 LT |
1201 | transport_setup_device(&sdev->sdev_gendev); |
1202 | spin_lock_irqsave(shost->host_lock, flags); | |
1203 | list_add_tail(&sdev->same_target_siblings, &starget->devices); | |
1204 | list_add_tail(&sdev->siblings, &shost->__devices); | |
1205 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1206 | } | |
1207 | ||
1208 | int scsi_is_sdev_device(const struct device *dev) | |
1209 | { | |
13ba9bcb | 1210 | return dev->type == &scsi_dev_type; |
1da177e4 LT |
1211 | } |
1212 | EXPORT_SYMBOL(scsi_is_sdev_device); | |
1213 | ||
1214 | /* A blank transport template that is used in drivers that don't | |
1215 | * yet implement Transport Attributes */ | |
1216 | struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |