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 LT |
9 | #include <linux/module.h> |
10 | #include <linux/init.h> | |
11 | #include <linux/blkdev.h> | |
12 | #include <linux/device.h> | |
13 | ||
14 | #include <scsi/scsi.h> | |
15 | #include <scsi/scsi_device.h> | |
16 | #include <scsi/scsi_host.h> | |
17 | #include <scsi/scsi_tcq.h> | |
18 | #include <scsi/scsi_transport.h> | |
44818efb | 19 | #include <scsi/scsi_driver.h> |
1da177e4 LT |
20 | |
21 | #include "scsi_priv.h" | |
22 | #include "scsi_logging.h" | |
23 | ||
0ad78200 | 24 | static const struct { |
1da177e4 LT |
25 | enum scsi_device_state value; |
26 | char *name; | |
27 | } sdev_states[] = { | |
28 | { SDEV_CREATED, "created" }, | |
29 | { SDEV_RUNNING, "running" }, | |
30 | { SDEV_CANCEL, "cancel" }, | |
31 | { SDEV_DEL, "deleted" }, | |
32 | { SDEV_QUIESCE, "quiesce" }, | |
33 | { SDEV_OFFLINE, "offline" }, | |
34 | { SDEV_BLOCK, "blocked" }, | |
35 | }; | |
36 | ||
37 | const char *scsi_device_state_name(enum scsi_device_state state) | |
38 | { | |
39 | int i; | |
40 | char *name = NULL; | |
41 | ||
6391a113 | 42 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
43 | if (sdev_states[i].value == state) { |
44 | name = sdev_states[i].name; | |
45 | break; | |
46 | } | |
47 | } | |
48 | return name; | |
49 | } | |
50 | ||
0ad78200 | 51 | static const struct { |
d3301874 MA |
52 | enum scsi_host_state value; |
53 | char *name; | |
54 | } shost_states[] = { | |
55 | { SHOST_CREATED, "created" }, | |
56 | { SHOST_RUNNING, "running" }, | |
57 | { SHOST_CANCEL, "cancel" }, | |
58 | { SHOST_DEL, "deleted" }, | |
59 | { SHOST_RECOVERY, "recovery" }, | |
939647ee JB |
60 | { SHOST_CANCEL_RECOVERY, "cancel/recovery" }, |
61 | { SHOST_DEL_RECOVERY, "deleted/recovery", }, | |
d3301874 MA |
62 | }; |
63 | const char *scsi_host_state_name(enum scsi_host_state state) | |
64 | { | |
65 | int i; | |
66 | char *name = NULL; | |
67 | ||
6391a113 | 68 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
69 | if (shost_states[i].value == state) { |
70 | name = shost_states[i].name; | |
71 | break; | |
72 | } | |
73 | } | |
74 | return name; | |
75 | } | |
76 | ||
1da177e4 LT |
77 | static int check_set(unsigned int *val, char *src) |
78 | { | |
79 | char *last; | |
80 | ||
81 | if (strncmp(src, "-", 20) == 0) { | |
82 | *val = SCAN_WILD_CARD; | |
83 | } else { | |
84 | /* | |
85 | * Doesn't check for int overflow | |
86 | */ | |
87 | *val = simple_strtoul(src, &last, 0); | |
88 | if (*last != '\0') | |
89 | return 1; | |
90 | } | |
91 | return 0; | |
92 | } | |
93 | ||
94 | static int scsi_scan(struct Scsi_Host *shost, const char *str) | |
95 | { | |
96 | char s1[15], s2[15], s3[15], junk; | |
97 | unsigned int channel, id, lun; | |
98 | int res; | |
99 | ||
100 | res = sscanf(str, "%10s %10s %10s %c", s1, s2, s3, &junk); | |
101 | if (res != 3) | |
102 | return -EINVAL; | |
103 | if (check_set(&channel, s1)) | |
104 | return -EINVAL; | |
105 | if (check_set(&id, s2)) | |
106 | return -EINVAL; | |
107 | if (check_set(&lun, s3)) | |
108 | return -EINVAL; | |
e02f3f59 CH |
109 | if (shost->transportt->user_scan) |
110 | res = shost->transportt->user_scan(shost, channel, id, lun); | |
111 | else | |
112 | res = scsi_scan_host_selected(shost, channel, id, lun, 1); | |
1da177e4 LT |
113 | return res; |
114 | } | |
115 | ||
116 | /* | |
117 | * shost_show_function: macro to create an attr function that can be used to | |
118 | * show a non-bit field. | |
119 | */ | |
120 | #define shost_show_function(name, field, format_string) \ | |
121 | static ssize_t \ | |
122 | show_##name (struct class_device *class_dev, char *buf) \ | |
123 | { \ | |
124 | struct Scsi_Host *shost = class_to_shost(class_dev); \ | |
125 | return snprintf (buf, 20, format_string, shost->field); \ | |
126 | } | |
127 | ||
128 | /* | |
129 | * shost_rd_attr: macro to create a function and attribute variable for a | |
130 | * read only field. | |
131 | */ | |
132 | #define shost_rd_attr2(name, field, format_string) \ | |
133 | shost_show_function(name, field, format_string) \ | |
134 | static CLASS_DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); | |
135 | ||
136 | #define shost_rd_attr(field, format_string) \ | |
137 | shost_rd_attr2(field, field, format_string) | |
138 | ||
139 | /* | |
140 | * Create the actual show/store functions and data structures. | |
141 | */ | |
142 | ||
143 | static ssize_t store_scan(struct class_device *class_dev, const char *buf, | |
144 | size_t count) | |
145 | { | |
146 | struct Scsi_Host *shost = class_to_shost(class_dev); | |
147 | int res; | |
148 | ||
149 | res = scsi_scan(shost, buf); | |
150 | if (res == 0) | |
151 | res = count; | |
152 | return res; | |
153 | }; | |
154 | static CLASS_DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); | |
155 | ||
d3301874 MA |
156 | static ssize_t |
157 | store_shost_state(struct class_device *class_dev, const char *buf, size_t count) | |
158 | { | |
159 | int i; | |
160 | struct Scsi_Host *shost = class_to_shost(class_dev); | |
161 | enum scsi_host_state state = 0; | |
162 | ||
6391a113 | 163 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
164 | const int len = strlen(shost_states[i].name); |
165 | if (strncmp(shost_states[i].name, buf, len) == 0 && | |
166 | buf[len] == '\n') { | |
167 | state = shost_states[i].value; | |
168 | break; | |
169 | } | |
170 | } | |
171 | if (!state) | |
172 | return -EINVAL; | |
173 | ||
174 | if (scsi_host_set_state(shost, state)) | |
175 | return -EINVAL; | |
176 | return count; | |
177 | } | |
178 | ||
179 | static ssize_t | |
180 | show_shost_state(struct class_device *class_dev, char *buf) | |
181 | { | |
182 | struct Scsi_Host *shost = class_to_shost(class_dev); | |
183 | const char *name = scsi_host_state_name(shost->shost_state); | |
184 | ||
185 | if (!name) | |
186 | return -EINVAL; | |
187 | ||
188 | return snprintf(buf, 20, "%s\n", name); | |
189 | } | |
190 | ||
191 | static CLASS_DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state); | |
192 | ||
5dc2b89e FT |
193 | static ssize_t |
194 | show_shost_mode(unsigned int mode, char *buf) | |
195 | { | |
196 | ssize_t len = 0; | |
197 | ||
198 | if (mode & MODE_INITIATOR) | |
199 | len = sprintf(buf, "%s", "Initiator"); | |
200 | ||
201 | if (mode & MODE_TARGET) | |
202 | len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target"); | |
203 | ||
204 | len += sprintf(buf + len, "\n"); | |
205 | ||
206 | return len; | |
207 | } | |
208 | ||
209 | static ssize_t show_shost_supported_mode(struct class_device *class_dev, char *buf) | |
210 | { | |
211 | struct Scsi_Host *shost = class_to_shost(class_dev); | |
7a39ac3f | 212 | unsigned int supported_mode = shost->hostt->supported_mode; |
5dc2b89e | 213 | |
7a39ac3f JB |
214 | if (supported_mode == MODE_UNKNOWN) |
215 | /* by default this should be initiator */ | |
216 | supported_mode = MODE_INITIATOR; | |
217 | ||
218 | return show_shost_mode(supported_mode, buf); | |
5dc2b89e FT |
219 | } |
220 | ||
221 | static CLASS_DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL); | |
222 | ||
223 | static ssize_t show_shost_active_mode(struct class_device *class_dev, char *buf) | |
224 | { | |
225 | struct Scsi_Host *shost = class_to_shost(class_dev); | |
226 | ||
227 | if (shost->active_mode == MODE_UNKNOWN) | |
228 | return snprintf(buf, 20, "unknown\n"); | |
229 | else | |
230 | return show_shost_mode(shost->active_mode, buf); | |
231 | } | |
232 | ||
233 | static CLASS_DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL); | |
234 | ||
1da177e4 LT |
235 | shost_rd_attr(unique_id, "%u\n"); |
236 | shost_rd_attr(host_busy, "%hu\n"); | |
237 | shost_rd_attr(cmd_per_lun, "%hd\n"); | |
ed632da8 | 238 | shost_rd_attr(can_queue, "%hd\n"); |
1da177e4 LT |
239 | shost_rd_attr(sg_tablesize, "%hu\n"); |
240 | shost_rd_attr(unchecked_isa_dma, "%d\n"); | |
241 | shost_rd_attr2(proc_name, hostt->proc_name, "%s\n"); | |
242 | ||
243 | static struct class_device_attribute *scsi_sysfs_shost_attrs[] = { | |
244 | &class_device_attr_unique_id, | |
245 | &class_device_attr_host_busy, | |
246 | &class_device_attr_cmd_per_lun, | |
ed632da8 | 247 | &class_device_attr_can_queue, |
1da177e4 LT |
248 | &class_device_attr_sg_tablesize, |
249 | &class_device_attr_unchecked_isa_dma, | |
250 | &class_device_attr_proc_name, | |
251 | &class_device_attr_scan, | |
d3301874 | 252 | &class_device_attr_state, |
5dc2b89e FT |
253 | &class_device_attr_supported_mode, |
254 | &class_device_attr_active_mode, | |
1da177e4 LT |
255 | NULL |
256 | }; | |
257 | ||
258 | static void scsi_device_cls_release(struct class_device *class_dev) | |
259 | { | |
260 | struct scsi_device *sdev; | |
261 | ||
262 | sdev = class_to_sdev(class_dev); | |
263 | put_device(&sdev->sdev_gendev); | |
264 | } | |
265 | ||
65f27f38 | 266 | static void scsi_device_dev_release_usercontext(struct work_struct *work) |
1da177e4 LT |
267 | { |
268 | struct scsi_device *sdev; | |
269 | struct device *parent; | |
270 | struct scsi_target *starget; | |
a341cd0f | 271 | struct list_head *this, *tmp; |
1da177e4 LT |
272 | unsigned long flags; |
273 | ||
65f27f38 DH |
274 | sdev = container_of(work, struct scsi_device, ew.work); |
275 | ||
276 | parent = sdev->sdev_gendev.parent; | |
1da177e4 LT |
277 | starget = to_scsi_target(parent); |
278 | ||
279 | spin_lock_irqsave(sdev->host->host_lock, flags); | |
280 | starget->reap_ref++; | |
281 | list_del(&sdev->siblings); | |
282 | list_del(&sdev->same_target_siblings); | |
283 | list_del(&sdev->starved_entry); | |
284 | spin_unlock_irqrestore(sdev->host->host_lock, flags); | |
285 | ||
a341cd0f JG |
286 | cancel_work_sync(&sdev->event_work); |
287 | ||
288 | list_for_each_safe(this, tmp, &sdev->event_list) { | |
289 | struct scsi_event *evt; | |
290 | ||
291 | evt = list_entry(this, struct scsi_event, node); | |
292 | list_del(&evt->node); | |
293 | kfree(evt); | |
294 | } | |
295 | ||
1da177e4 LT |
296 | if (sdev->request_queue) { |
297 | sdev->request_queue->queuedata = NULL; | |
65110b21 | 298 | /* user context needed to free queue */ |
1da177e4 | 299 | scsi_free_queue(sdev->request_queue); |
c2a9331c | 300 | /* temporary expedient, try to catch use of queue lock |
301 | * after free of sdev */ | |
302 | sdev->request_queue = NULL; | |
1da177e4 LT |
303 | } |
304 | ||
305 | scsi_target_reap(scsi_target(sdev)); | |
306 | ||
307 | kfree(sdev->inquiry); | |
308 | kfree(sdev); | |
309 | ||
310 | if (parent) | |
311 | put_device(parent); | |
312 | } | |
313 | ||
65110b21 JB |
314 | static void scsi_device_dev_release(struct device *dev) |
315 | { | |
ffedb452 | 316 | struct scsi_device *sdp = to_scsi_device(dev); |
65f27f38 | 317 | execute_in_process_context(scsi_device_dev_release_usercontext, |
ffedb452 | 318 | &sdp->ew); |
65110b21 JB |
319 | } |
320 | ||
52c1da39 | 321 | static struct class sdev_class = { |
1da177e4 LT |
322 | .name = "scsi_device", |
323 | .release = scsi_device_cls_release, | |
324 | }; | |
325 | ||
326 | /* all probing is done in the individual ->probe routines */ | |
327 | static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) | |
328 | { | |
329 | struct scsi_device *sdp = to_scsi_device(dev); | |
330 | if (sdp->no_uld_attach) | |
331 | return 0; | |
332 | return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; | |
333 | } | |
334 | ||
7eff2e7a | 335 | static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
d7b8bcb0 MT |
336 | { |
337 | struct scsi_device *sdev = to_scsi_device(dev); | |
d7b8bcb0 | 338 | |
7eff2e7a | 339 | add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type); |
d7b8bcb0 MT |
340 | return 0; |
341 | } | |
342 | ||
9b847548 JA |
343 | static int scsi_bus_suspend(struct device * dev, pm_message_t state) |
344 | { | |
c3c94c5a | 345 | struct device_driver *drv = dev->driver; |
9b847548 | 346 | struct scsi_device *sdev = to_scsi_device(dev); |
9b847548 JA |
347 | int err; |
348 | ||
349 | err = scsi_device_quiesce(sdev); | |
350 | if (err) | |
351 | return err; | |
352 | ||
c3c94c5a TH |
353 | if (drv && drv->suspend) { |
354 | err = drv->suspend(dev, state); | |
355 | if (err) | |
356 | return err; | |
357 | } | |
358 | ||
c3c94c5a | 359 | return 0; |
9b847548 JA |
360 | } |
361 | ||
362 | static int scsi_bus_resume(struct device * dev) | |
363 | { | |
c3c94c5a | 364 | struct device_driver *drv = dev->driver; |
9b847548 | 365 | struct scsi_device *sdev = to_scsi_device(dev); |
1dfcda06 | 366 | int err = 0; |
9b847548 | 367 | |
c3c94c5a | 368 | if (drv && drv->resume) |
1dfcda06 | 369 | err = drv->resume(dev); |
c3c94c5a | 370 | |
9b847548 | 371 | scsi_device_resume(sdev); |
c3c94c5a | 372 | |
1dfcda06 | 373 | return err; |
9b847548 JA |
374 | } |
375 | ||
751bf4d7 JB |
376 | static int scsi_bus_remove(struct device *dev) |
377 | { | |
378 | struct device_driver *drv = dev->driver; | |
379 | struct scsi_device *sdev = to_scsi_device(dev); | |
380 | int err = 0; | |
381 | ||
382 | /* reset the prep_fn back to the default since the | |
383 | * driver may have altered it and it's being removed */ | |
384 | blk_queue_prep_rq(sdev->request_queue, scsi_prep_fn); | |
385 | ||
386 | if (drv && drv->remove) | |
387 | err = drv->remove(dev); | |
388 | ||
389 | return 0; | |
390 | } | |
391 | ||
1da177e4 LT |
392 | struct bus_type scsi_bus_type = { |
393 | .name = "scsi", | |
394 | .match = scsi_bus_match, | |
d7b8bcb0 | 395 | .uevent = scsi_bus_uevent, |
9b847548 JA |
396 | .suspend = scsi_bus_suspend, |
397 | .resume = scsi_bus_resume, | |
751bf4d7 | 398 | .remove = scsi_bus_remove, |
1da177e4 LT |
399 | }; |
400 | ||
401 | int scsi_sysfs_register(void) | |
402 | { | |
403 | int error; | |
404 | ||
405 | error = bus_register(&scsi_bus_type); | |
406 | if (!error) { | |
407 | error = class_register(&sdev_class); | |
408 | if (error) | |
409 | bus_unregister(&scsi_bus_type); | |
410 | } | |
411 | ||
412 | return error; | |
413 | } | |
414 | ||
415 | void scsi_sysfs_unregister(void) | |
416 | { | |
417 | class_unregister(&sdev_class); | |
418 | bus_unregister(&scsi_bus_type); | |
419 | } | |
420 | ||
421 | /* | |
422 | * sdev_show_function: macro to create an attr function that can be used to | |
423 | * show a non-bit field. | |
424 | */ | |
425 | #define sdev_show_function(field, format_string) \ | |
426 | static ssize_t \ | |
10523b3b | 427 | sdev_show_##field (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
428 | { \ |
429 | struct scsi_device *sdev; \ | |
430 | sdev = to_scsi_device(dev); \ | |
431 | return snprintf (buf, 20, format_string, sdev->field); \ | |
432 | } \ | |
433 | ||
434 | /* | |
435 | * sdev_rd_attr: macro to create a function and attribute variable for a | |
436 | * read only field. | |
437 | */ | |
438 | #define sdev_rd_attr(field, format_string) \ | |
439 | sdev_show_function(field, format_string) \ | |
440 | static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); | |
441 | ||
442 | ||
443 | /* | |
444 | * sdev_rd_attr: create a function and attribute variable for a | |
445 | * read/write field. | |
446 | */ | |
447 | #define sdev_rw_attr(field, format_string) \ | |
448 | sdev_show_function(field, format_string) \ | |
449 | \ | |
450 | static ssize_t \ | |
10523b3b | 451 | sdev_store_##field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \ |
1da177e4 LT |
452 | { \ |
453 | struct scsi_device *sdev; \ | |
454 | sdev = to_scsi_device(dev); \ | |
455 | snscanf (buf, 20, format_string, &sdev->field); \ | |
456 | return count; \ | |
457 | } \ | |
458 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
459 | ||
460 | /* Currently we don't export bit fields, but we might in future, | |
461 | * so leave this code in */ | |
462 | #if 0 | |
463 | /* | |
464 | * sdev_rd_attr: create a function and attribute variable for a | |
465 | * read/write bit field. | |
466 | */ | |
467 | #define sdev_rw_attr_bit(field) \ | |
468 | sdev_show_function(field, "%d\n") \ | |
469 | \ | |
470 | static ssize_t \ | |
10523b3b | 471 | sdev_store_##field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \ |
1da177e4 LT |
472 | { \ |
473 | int ret; \ | |
474 | struct scsi_device *sdev; \ | |
475 | ret = scsi_sdev_check_buf_bit(buf); \ | |
476 | if (ret >= 0) { \ | |
477 | sdev = to_scsi_device(dev); \ | |
478 | sdev->field = ret; \ | |
479 | ret = count; \ | |
480 | } \ | |
481 | return ret; \ | |
482 | } \ | |
483 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
484 | ||
485 | /* | |
486 | * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", | |
487 | * else return -EINVAL. | |
488 | */ | |
489 | static int scsi_sdev_check_buf_bit(const char *buf) | |
490 | { | |
491 | if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { | |
492 | if (buf[0] == '1') | |
493 | return 1; | |
494 | else if (buf[0] == '0') | |
495 | return 0; | |
496 | else | |
497 | return -EINVAL; | |
498 | } else | |
499 | return -EINVAL; | |
500 | } | |
501 | #endif | |
502 | /* | |
503 | * Create the actual show/store functions and data structures. | |
504 | */ | |
505 | sdev_rd_attr (device_blocked, "%d\n"); | |
506 | sdev_rd_attr (queue_depth, "%d\n"); | |
507 | sdev_rd_attr (type, "%d\n"); | |
508 | sdev_rd_attr (scsi_level, "%d\n"); | |
509 | sdev_rd_attr (vendor, "%.8s\n"); | |
510 | sdev_rd_attr (model, "%.16s\n"); | |
511 | sdev_rd_attr (rev, "%.4s\n"); | |
512 | ||
513 | static ssize_t | |
10523b3b | 514 | sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
515 | { |
516 | struct scsi_device *sdev; | |
517 | sdev = to_scsi_device(dev); | |
518 | return snprintf (buf, 20, "%d\n", sdev->timeout / HZ); | |
519 | } | |
520 | ||
521 | static ssize_t | |
10523b3b | 522 | sdev_store_timeout (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
523 | { |
524 | struct scsi_device *sdev; | |
525 | int timeout; | |
526 | sdev = to_scsi_device(dev); | |
527 | sscanf (buf, "%d\n", &timeout); | |
528 | sdev->timeout = timeout * HZ; | |
529 | return count; | |
530 | } | |
531 | static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); | |
532 | ||
533 | static ssize_t | |
10523b3b | 534 | store_rescan_field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
535 | { |
536 | scsi_rescan_device(dev); | |
537 | return count; | |
538 | } | |
539 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); | |
540 | ||
d9a9cdfb AS |
541 | static void sdev_store_delete_callback(struct device *dev) |
542 | { | |
543 | scsi_remove_device(to_scsi_device(dev)); | |
544 | } | |
545 | ||
10523b3b | 546 | static ssize_t sdev_store_delete(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
547 | size_t count) |
548 | { | |
d9a9cdfb AS |
549 | int rc; |
550 | ||
551 | /* An attribute cannot be unregistered by one of its own methods, | |
552 | * so we have to use this roundabout approach. | |
553 | */ | |
554 | rc = device_schedule_callback(dev, sdev_store_delete_callback); | |
555 | if (rc) | |
556 | count = rc; | |
1da177e4 LT |
557 | return count; |
558 | }; | |
559 | static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); | |
560 | ||
561 | static ssize_t | |
10523b3b | 562 | store_state_field(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
563 | { |
564 | int i; | |
565 | struct scsi_device *sdev = to_scsi_device(dev); | |
566 | enum scsi_device_state state = 0; | |
567 | ||
6391a113 | 568 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
569 | const int len = strlen(sdev_states[i].name); |
570 | if (strncmp(sdev_states[i].name, buf, len) == 0 && | |
571 | buf[len] == '\n') { | |
572 | state = sdev_states[i].value; | |
573 | break; | |
574 | } | |
575 | } | |
576 | if (!state) | |
577 | return -EINVAL; | |
578 | ||
579 | if (scsi_device_set_state(sdev, state)) | |
580 | return -EINVAL; | |
581 | return count; | |
582 | } | |
583 | ||
584 | static ssize_t | |
10523b3b | 585 | show_state_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
586 | { |
587 | struct scsi_device *sdev = to_scsi_device(dev); | |
588 | const char *name = scsi_device_state_name(sdev->sdev_state); | |
589 | ||
590 | if (!name) | |
591 | return -EINVAL; | |
592 | ||
593 | return snprintf(buf, 20, "%s\n", name); | |
594 | } | |
595 | ||
596 | static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); | |
597 | ||
598 | static ssize_t | |
10523b3b | 599 | show_queue_type_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
600 | { |
601 | struct scsi_device *sdev = to_scsi_device(dev); | |
602 | const char *name = "none"; | |
603 | ||
604 | if (sdev->ordered_tags) | |
605 | name = "ordered"; | |
606 | else if (sdev->simple_tags) | |
607 | name = "simple"; | |
608 | ||
609 | return snprintf(buf, 20, "%s\n", name); | |
610 | } | |
611 | ||
612 | static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL); | |
613 | ||
614 | static ssize_t | |
10523b3b | 615 | show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
616 | { |
617 | return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); | |
618 | } | |
619 | ||
620 | static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); | |
621 | ||
622 | #define show_sdev_iostat(field) \ | |
623 | static ssize_t \ | |
10523b3b | 624 | show_iostat_##field(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
625 | { \ |
626 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
627 | unsigned long long count = atomic_read(&sdev->field); \ | |
628 | return snprintf(buf, 20, "0x%llx\n", count); \ | |
629 | } \ | |
630 | static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) | |
631 | ||
632 | show_sdev_iostat(iorequest_cnt); | |
633 | show_sdev_iostat(iodone_cnt); | |
634 | show_sdev_iostat(ioerr_cnt); | |
635 | ||
d7b8bcb0 MT |
636 | static ssize_t |
637 | sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf) | |
638 | { | |
639 | struct scsi_device *sdev; | |
640 | sdev = to_scsi_device(dev); | |
641 | return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type); | |
642 | } | |
643 | static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL); | |
1da177e4 | 644 | |
a341cd0f JG |
645 | #define DECLARE_EVT_SHOW(name, Cap_name) \ |
646 | static ssize_t \ | |
647 | sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \ | |
648 | char *buf) \ | |
649 | { \ | |
650 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
651 | int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\ | |
652 | return snprintf(buf, 20, "%d\n", val); \ | |
653 | } | |
654 | ||
655 | #define DECLARE_EVT_STORE(name, Cap_name) \ | |
656 | static ssize_t \ | |
657 | sdev_store_evt_##name(struct device *dev, struct device_attribute *attr, \ | |
658 | const char *buf, size_t count) \ | |
659 | { \ | |
660 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
661 | int val = simple_strtoul(buf, NULL, 0); \ | |
662 | if (val == 0) \ | |
663 | clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
664 | else if (val == 1) \ | |
665 | set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
666 | else \ | |
667 | return -EINVAL; \ | |
668 | return count; \ | |
669 | } | |
670 | ||
671 | #define DECLARE_EVT(name, Cap_name) \ | |
672 | DECLARE_EVT_SHOW(name, Cap_name) \ | |
673 | DECLARE_EVT_STORE(name, Cap_name) \ | |
674 | static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \ | |
675 | sdev_store_evt_##name); | |
676 | #define REF_EVT(name) &dev_attr_evt_##name.attr | |
677 | ||
678 | DECLARE_EVT(media_change, MEDIA_CHANGE) | |
679 | ||
1da177e4 | 680 | /* Default template for device attributes. May NOT be modified */ |
bfd12944 KS |
681 | static struct attribute *scsi_sdev_attrs[] = { |
682 | &dev_attr_device_blocked.attr, | |
683 | &dev_attr_type.attr, | |
684 | &dev_attr_scsi_level.attr, | |
685 | &dev_attr_vendor.attr, | |
686 | &dev_attr_model.attr, | |
687 | &dev_attr_rev.attr, | |
688 | &dev_attr_rescan.attr, | |
689 | &dev_attr_delete.attr, | |
690 | &dev_attr_state.attr, | |
691 | &dev_attr_timeout.attr, | |
692 | &dev_attr_iocounterbits.attr, | |
693 | &dev_attr_iorequest_cnt.attr, | |
694 | &dev_attr_iodone_cnt.attr, | |
695 | &dev_attr_ioerr_cnt.attr, | |
696 | &dev_attr_modalias.attr, | |
a341cd0f | 697 | REF_EVT(media_change), |
bfd12944 KS |
698 | NULL |
699 | }; | |
700 | ||
701 | static struct attribute_group scsi_sdev_attr_group = { | |
702 | .attrs = scsi_sdev_attrs, | |
703 | }; | |
704 | ||
705 | static struct attribute_group *scsi_sdev_attr_groups[] = { | |
706 | &scsi_sdev_attr_group, | |
1da177e4 LT |
707 | NULL |
708 | }; | |
709 | ||
10523b3b | 710 | static ssize_t sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
711 | size_t count) |
712 | { | |
713 | int depth, retval; | |
714 | struct scsi_device *sdev = to_scsi_device(dev); | |
715 | struct scsi_host_template *sht = sdev->host->hostt; | |
716 | ||
717 | if (!sht->change_queue_depth) | |
718 | return -EINVAL; | |
719 | ||
720 | depth = simple_strtoul(buf, NULL, 0); | |
721 | ||
722 | if (depth < 1) | |
723 | return -EINVAL; | |
724 | ||
725 | retval = sht->change_queue_depth(sdev, depth); | |
726 | if (retval < 0) | |
727 | return retval; | |
728 | ||
729 | return count; | |
730 | } | |
731 | ||
732 | static struct device_attribute sdev_attr_queue_depth_rw = | |
733 | __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, | |
734 | sdev_store_queue_depth_rw); | |
735 | ||
10523b3b | 736 | static ssize_t sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
737 | size_t count) |
738 | { | |
739 | struct scsi_device *sdev = to_scsi_device(dev); | |
740 | struct scsi_host_template *sht = sdev->host->hostt; | |
741 | int tag_type = 0, retval; | |
742 | int prev_tag_type = scsi_get_tag_type(sdev); | |
743 | ||
744 | if (!sdev->tagged_supported || !sht->change_queue_type) | |
745 | return -EINVAL; | |
746 | ||
747 | if (strncmp(buf, "ordered", 7) == 0) | |
748 | tag_type = MSG_ORDERED_TAG; | |
749 | else if (strncmp(buf, "simple", 6) == 0) | |
750 | tag_type = MSG_SIMPLE_TAG; | |
751 | else if (strncmp(buf, "none", 4) != 0) | |
752 | return -EINVAL; | |
753 | ||
754 | if (tag_type == prev_tag_type) | |
755 | return count; | |
756 | ||
757 | retval = sht->change_queue_type(sdev, tag_type); | |
758 | if (retval < 0) | |
759 | return retval; | |
760 | ||
761 | return count; | |
762 | } | |
763 | ||
764 | static struct device_attribute sdev_attr_queue_type_rw = | |
765 | __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, | |
766 | sdev_store_queue_type_rw); | |
767 | ||
1da177e4 LT |
768 | /** |
769 | * scsi_sysfs_add_sdev - add scsi device to sysfs | |
770 | * @sdev: scsi_device to add | |
771 | * | |
772 | * Return value: | |
773 | * 0 on Success / non-zero on Failure | |
774 | **/ | |
775 | int scsi_sysfs_add_sdev(struct scsi_device *sdev) | |
776 | { | |
777 | int error, i; | |
80ed71ce | 778 | struct request_queue *rq = sdev->request_queue; |
1da177e4 LT |
779 | |
780 | if ((error = scsi_device_set_state(sdev, SDEV_RUNNING)) != 0) | |
781 | return error; | |
782 | ||
783 | error = device_add(&sdev->sdev_gendev); | |
784 | if (error) { | |
785 | put_device(sdev->sdev_gendev.parent); | |
786 | printk(KERN_INFO "error 1\n"); | |
787 | return error; | |
788 | } | |
789 | error = class_device_add(&sdev->sdev_classdev); | |
790 | if (error) { | |
791 | printk(KERN_INFO "error 2\n"); | |
792 | goto clean_device; | |
793 | } | |
794 | ||
795 | /* take a reference for the sdev_classdev; this is | |
796 | * released by the sdev_class .release */ | |
797 | get_device(&sdev->sdev_gendev); | |
80ed71ce | 798 | |
bfd12944 KS |
799 | /* create queue files, which may be writable, depending on the host */ |
800 | if (sdev->host->hostt->change_queue_depth) | |
801 | error = device_create_file(&sdev->sdev_gendev, &sdev_attr_queue_depth_rw); | |
802 | else | |
803 | error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_depth); | |
804 | if (error) { | |
805 | __scsi_remove_device(sdev); | |
806 | goto out; | |
807 | } | |
808 | if (sdev->host->hostt->change_queue_type) | |
809 | error = device_create_file(&sdev->sdev_gendev, &sdev_attr_queue_type_rw); | |
810 | else | |
811 | error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_type); | |
812 | if (error) { | |
813 | __scsi_remove_device(sdev); | |
814 | goto out; | |
815 | } | |
816 | ||
39dca558 | 817 | error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL); |
80ed71ce JB |
818 | |
819 | if (error) | |
820 | sdev_printk(KERN_INFO, sdev, | |
821 | "Failed to register bsg queue, errno=%d\n", error); | |
822 | ||
823 | /* we're treating error on bsg register as non-fatal, so pretend | |
824 | * nothing went wrong */ | |
825 | error = 0; | |
826 | ||
bfd12944 | 827 | /* add additional host specific attributes */ |
1da177e4 LT |
828 | if (sdev->host->hostt->sdev_attrs) { |
829 | for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { | |
bfd12944 | 830 | error = device_create_file(&sdev->sdev_gendev, |
1da177e4 LT |
831 | sdev->host->hostt->sdev_attrs[i]); |
832 | if (error) { | |
903f4fed | 833 | __scsi_remove_device(sdev); |
1da177e4 LT |
834 | goto out; |
835 | } | |
836 | } | |
837 | } | |
1da177e4 LT |
838 | |
839 | transport_add_device(&sdev->sdev_gendev); | |
840 | out: | |
841 | return error; | |
842 | ||
843 | clean_device: | |
844 | scsi_device_set_state(sdev, SDEV_CANCEL); | |
845 | ||
846 | device_del(&sdev->sdev_gendev); | |
847 | transport_destroy_device(&sdev->sdev_gendev); | |
848 | put_device(&sdev->sdev_gendev); | |
849 | ||
850 | return error; | |
851 | } | |
852 | ||
903f4fed | 853 | void __scsi_remove_device(struct scsi_device *sdev) |
1da177e4 | 854 | { |
df133c21 JB |
855 | struct device *dev = &sdev->sdev_gendev; |
856 | ||
1da177e4 | 857 | if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0) |
903f4fed | 858 | return; |
1da177e4 | 859 | |
80ed71ce | 860 | bsg_unregister_queue(sdev->request_queue); |
1da177e4 | 861 | class_device_unregister(&sdev->sdev_classdev); |
df133c21 JB |
862 | transport_remove_device(dev); |
863 | device_del(dev); | |
1da177e4 LT |
864 | scsi_device_set_state(sdev, SDEV_DEL); |
865 | if (sdev->host->hostt->slave_destroy) | |
866 | sdev->host->hostt->slave_destroy(sdev); | |
df133c21 JB |
867 | transport_destroy_device(dev); |
868 | put_device(dev); | |
903f4fed AS |
869 | } |
870 | ||
871 | /** | |
872 | * scsi_remove_device - unregister a device from the scsi bus | |
873 | * @sdev: scsi_device to unregister | |
874 | **/ | |
875 | void scsi_remove_device(struct scsi_device *sdev) | |
876 | { | |
54195002 AS |
877 | struct Scsi_Host *shost = sdev->host; |
878 | ||
0b950672 | 879 | mutex_lock(&shost->scan_mutex); |
903f4fed | 880 | __scsi_remove_device(sdev); |
0b950672 | 881 | mutex_unlock(&shost->scan_mutex); |
1da177e4 LT |
882 | } |
883 | EXPORT_SYMBOL(scsi_remove_device); | |
884 | ||
44818efb | 885 | static void __scsi_remove_target(struct scsi_target *starget) |
1da177e4 LT |
886 | { |
887 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
888 | unsigned long flags; | |
a64358db | 889 | struct scsi_device *sdev; |
1da177e4 LT |
890 | |
891 | spin_lock_irqsave(shost->host_lock, flags); | |
892 | starget->reap_ref++; | |
a64358db AS |
893 | restart: |
894 | list_for_each_entry(sdev, &shost->__devices, siblings) { | |
1da177e4 | 895 | if (sdev->channel != starget->channel || |
a64358db AS |
896 | sdev->id != starget->id || |
897 | sdev->sdev_state == SDEV_DEL) | |
1da177e4 LT |
898 | continue; |
899 | spin_unlock_irqrestore(shost->host_lock, flags); | |
900 | scsi_remove_device(sdev); | |
901 | spin_lock_irqsave(shost->host_lock, flags); | |
a64358db | 902 | goto restart; |
1da177e4 LT |
903 | } |
904 | spin_unlock_irqrestore(shost->host_lock, flags); | |
905 | scsi_target_reap(starget); | |
906 | } | |
907 | ||
20b1e674 | 908 | static int __remove_child (struct device * dev, void * data) |
909 | { | |
910 | if (scsi_is_target_device(dev)) | |
911 | __scsi_remove_target(to_scsi_target(dev)); | |
912 | return 0; | |
913 | } | |
914 | ||
1da177e4 LT |
915 | /** |
916 | * scsi_remove_target - try to remove a target and all its devices | |
917 | * @dev: generic starget or parent of generic stargets to be removed | |
918 | * | |
919 | * Note: This is slightly racy. It is possible that if the user | |
920 | * requests the addition of another device then the target won't be | |
921 | * removed. | |
922 | */ | |
923 | void scsi_remove_target(struct device *dev) | |
924 | { | |
20b1e674 | 925 | struct device *rdev; |
1da177e4 LT |
926 | |
927 | if (scsi_is_target_device(dev)) { | |
928 | __scsi_remove_target(to_scsi_target(dev)); | |
929 | return; | |
930 | } | |
931 | ||
932 | rdev = get_device(dev); | |
20b1e674 | 933 | device_for_each_child(dev, NULL, __remove_child); |
1da177e4 LT |
934 | put_device(rdev); |
935 | } | |
936 | EXPORT_SYMBOL(scsi_remove_target); | |
937 | ||
938 | int scsi_register_driver(struct device_driver *drv) | |
939 | { | |
940 | drv->bus = &scsi_bus_type; | |
941 | ||
942 | return driver_register(drv); | |
943 | } | |
944 | EXPORT_SYMBOL(scsi_register_driver); | |
945 | ||
946 | int scsi_register_interface(struct class_interface *intf) | |
947 | { | |
948 | intf->class = &sdev_class; | |
949 | ||
950 | return class_interface_register(intf); | |
951 | } | |
952 | EXPORT_SYMBOL(scsi_register_interface); | |
953 | ||
954 | ||
955 | static struct class_device_attribute *class_attr_overridden( | |
956 | struct class_device_attribute **attrs, | |
957 | struct class_device_attribute *attr) | |
958 | { | |
959 | int i; | |
960 | ||
961 | if (!attrs) | |
962 | return NULL; | |
963 | for (i = 0; attrs[i]; i++) | |
964 | if (!strcmp(attrs[i]->attr.name, attr->attr.name)) | |
965 | return attrs[i]; | |
966 | return NULL; | |
967 | } | |
968 | ||
969 | static int class_attr_add(struct class_device *classdev, | |
970 | struct class_device_attribute *attr) | |
971 | { | |
972 | struct class_device_attribute *base_attr; | |
973 | ||
974 | /* | |
975 | * Spare the caller from having to copy things it's not interested in. | |
976 | */ | |
977 | base_attr = class_attr_overridden(scsi_sysfs_shost_attrs, attr); | |
978 | if (base_attr) { | |
979 | /* extend permissions */ | |
980 | attr->attr.mode |= base_attr->attr.mode; | |
981 | ||
982 | /* override null show/store with default */ | |
983 | if (!attr->show) | |
984 | attr->show = base_attr->show; | |
985 | if (!attr->store) | |
986 | attr->store = base_attr->store; | |
987 | } | |
988 | ||
989 | return class_device_create_file(classdev, attr); | |
990 | } | |
991 | ||
992 | /** | |
993 | * scsi_sysfs_add_host - add scsi host to subsystem | |
994 | * @shost: scsi host struct to add to subsystem | |
995 | * @dev: parent struct device pointer | |
996 | **/ | |
997 | int scsi_sysfs_add_host(struct Scsi_Host *shost) | |
998 | { | |
999 | int error, i; | |
1000 | ||
1001 | if (shost->hostt->shost_attrs) { | |
1002 | for (i = 0; shost->hostt->shost_attrs[i]; i++) { | |
1003 | error = class_attr_add(&shost->shost_classdev, | |
1004 | shost->hostt->shost_attrs[i]); | |
1005 | if (error) | |
1006 | return error; | |
1007 | } | |
1008 | } | |
1009 | ||
1010 | for (i = 0; scsi_sysfs_shost_attrs[i]; i++) { | |
1011 | if (!class_attr_overridden(shost->hostt->shost_attrs, | |
1012 | scsi_sysfs_shost_attrs[i])) { | |
1013 | error = class_device_create_file(&shost->shost_classdev, | |
1014 | scsi_sysfs_shost_attrs[i]); | |
1015 | if (error) | |
1016 | return error; | |
1017 | } | |
1018 | } | |
1019 | ||
1020 | transport_register_device(&shost->shost_gendev); | |
1021 | return 0; | |
1022 | } | |
1023 | ||
bfd12944 KS |
1024 | static struct device_type scsi_dev_type = { |
1025 | .name = "scsi_device", | |
1026 | .release = scsi_device_dev_release, | |
1027 | .groups = scsi_sdev_attr_groups, | |
1028 | }; | |
1029 | ||
1da177e4 LT |
1030 | void scsi_sysfs_device_initialize(struct scsi_device *sdev) |
1031 | { | |
1032 | unsigned long flags; | |
1033 | struct Scsi_Host *shost = sdev->host; | |
1034 | struct scsi_target *starget = sdev->sdev_target; | |
1035 | ||
1036 | device_initialize(&sdev->sdev_gendev); | |
1037 | sdev->sdev_gendev.bus = &scsi_bus_type; | |
bfd12944 | 1038 | sdev->sdev_gendev.type = &scsi_dev_type; |
1da177e4 LT |
1039 | sprintf(sdev->sdev_gendev.bus_id,"%d:%d:%d:%d", |
1040 | sdev->host->host_no, sdev->channel, sdev->id, | |
1041 | sdev->lun); | |
1042 | ||
1043 | class_device_initialize(&sdev->sdev_classdev); | |
1044 | sdev->sdev_classdev.dev = &sdev->sdev_gendev; | |
1045 | sdev->sdev_classdev.class = &sdev_class; | |
1046 | snprintf(sdev->sdev_classdev.class_id, BUS_ID_SIZE, | |
1047 | "%d:%d:%d:%d", sdev->host->host_no, | |
1048 | sdev->channel, sdev->id, sdev->lun); | |
7c9d6f16 | 1049 | sdev->scsi_level = starget->scsi_level; |
1da177e4 LT |
1050 | transport_setup_device(&sdev->sdev_gendev); |
1051 | spin_lock_irqsave(shost->host_lock, flags); | |
1052 | list_add_tail(&sdev->same_target_siblings, &starget->devices); | |
1053 | list_add_tail(&sdev->siblings, &shost->__devices); | |
1054 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1055 | } | |
1056 | ||
1057 | int scsi_is_sdev_device(const struct device *dev) | |
1058 | { | |
13ba9bcb | 1059 | return dev->type == &scsi_dev_type; |
1da177e4 LT |
1060 | } |
1061 | EXPORT_SYMBOL(scsi_is_sdev_device); | |
1062 | ||
1063 | /* A blank transport template that is used in drivers that don't | |
1064 | * yet implement Transport Attributes */ | |
1065 | struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |