]>
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 | ||
1da177e4 LT |
193 | shost_rd_attr(unique_id, "%u\n"); |
194 | shost_rd_attr(host_busy, "%hu\n"); | |
195 | shost_rd_attr(cmd_per_lun, "%hd\n"); | |
ed632da8 | 196 | shost_rd_attr(can_queue, "%hd\n"); |
1da177e4 LT |
197 | shost_rd_attr(sg_tablesize, "%hu\n"); |
198 | shost_rd_attr(unchecked_isa_dma, "%d\n"); | |
199 | shost_rd_attr2(proc_name, hostt->proc_name, "%s\n"); | |
200 | ||
201 | static struct class_device_attribute *scsi_sysfs_shost_attrs[] = { | |
202 | &class_device_attr_unique_id, | |
203 | &class_device_attr_host_busy, | |
204 | &class_device_attr_cmd_per_lun, | |
ed632da8 | 205 | &class_device_attr_can_queue, |
1da177e4 LT |
206 | &class_device_attr_sg_tablesize, |
207 | &class_device_attr_unchecked_isa_dma, | |
208 | &class_device_attr_proc_name, | |
209 | &class_device_attr_scan, | |
d3301874 | 210 | &class_device_attr_state, |
1da177e4 LT |
211 | NULL |
212 | }; | |
213 | ||
214 | static void scsi_device_cls_release(struct class_device *class_dev) | |
215 | { | |
216 | struct scsi_device *sdev; | |
217 | ||
218 | sdev = class_to_sdev(class_dev); | |
219 | put_device(&sdev->sdev_gendev); | |
220 | } | |
221 | ||
65f27f38 | 222 | static void scsi_device_dev_release_usercontext(struct work_struct *work) |
1da177e4 LT |
223 | { |
224 | struct scsi_device *sdev; | |
225 | struct device *parent; | |
226 | struct scsi_target *starget; | |
227 | unsigned long flags; | |
228 | ||
65f27f38 DH |
229 | sdev = container_of(work, struct scsi_device, ew.work); |
230 | ||
231 | parent = sdev->sdev_gendev.parent; | |
1da177e4 LT |
232 | starget = to_scsi_target(parent); |
233 | ||
234 | spin_lock_irqsave(sdev->host->host_lock, flags); | |
235 | starget->reap_ref++; | |
236 | list_del(&sdev->siblings); | |
237 | list_del(&sdev->same_target_siblings); | |
238 | list_del(&sdev->starved_entry); | |
239 | spin_unlock_irqrestore(sdev->host->host_lock, flags); | |
240 | ||
241 | if (sdev->request_queue) { | |
242 | sdev->request_queue->queuedata = NULL; | |
65110b21 | 243 | /* user context needed to free queue */ |
1da177e4 | 244 | scsi_free_queue(sdev->request_queue); |
c2a9331c JB |
245 | /* temporary expedient, try to catch use of queue lock |
246 | * after free of sdev */ | |
247 | sdev->request_queue = NULL; | |
1da177e4 LT |
248 | } |
249 | ||
250 | scsi_target_reap(scsi_target(sdev)); | |
251 | ||
252 | kfree(sdev->inquiry); | |
253 | kfree(sdev); | |
254 | ||
255 | if (parent) | |
256 | put_device(parent); | |
257 | } | |
258 | ||
65110b21 JB |
259 | static void scsi_device_dev_release(struct device *dev) |
260 | { | |
ffedb452 | 261 | struct scsi_device *sdp = to_scsi_device(dev); |
65f27f38 | 262 | execute_in_process_context(scsi_device_dev_release_usercontext, |
ffedb452 | 263 | &sdp->ew); |
65110b21 JB |
264 | } |
265 | ||
52c1da39 | 266 | static struct class sdev_class = { |
1da177e4 LT |
267 | .name = "scsi_device", |
268 | .release = scsi_device_cls_release, | |
269 | }; | |
270 | ||
271 | /* all probing is done in the individual ->probe routines */ | |
272 | static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) | |
273 | { | |
274 | struct scsi_device *sdp = to_scsi_device(dev); | |
275 | if (sdp->no_uld_attach) | |
276 | return 0; | |
277 | return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; | |
278 | } | |
279 | ||
7eff2e7a | 280 | static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
d7b8bcb0 MT |
281 | { |
282 | struct scsi_device *sdev = to_scsi_device(dev); | |
d7b8bcb0 | 283 | |
7eff2e7a | 284 | add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type); |
d7b8bcb0 MT |
285 | return 0; |
286 | } | |
287 | ||
9b847548 JA |
288 | static int scsi_bus_suspend(struct device * dev, pm_message_t state) |
289 | { | |
c3c94c5a | 290 | struct device_driver *drv = dev->driver; |
9b847548 | 291 | struct scsi_device *sdev = to_scsi_device(dev); |
9b847548 JA |
292 | int err; |
293 | ||
294 | err = scsi_device_quiesce(sdev); | |
295 | if (err) | |
296 | return err; | |
297 | ||
c3c94c5a TH |
298 | if (drv && drv->suspend) { |
299 | err = drv->suspend(dev, state); | |
300 | if (err) | |
301 | return err; | |
302 | } | |
303 | ||
c3c94c5a | 304 | return 0; |
9b847548 JA |
305 | } |
306 | ||
307 | static int scsi_bus_resume(struct device * dev) | |
308 | { | |
c3c94c5a | 309 | struct device_driver *drv = dev->driver; |
9b847548 | 310 | struct scsi_device *sdev = to_scsi_device(dev); |
1dfcda06 | 311 | int err = 0; |
9b847548 | 312 | |
c3c94c5a | 313 | if (drv && drv->resume) |
1dfcda06 | 314 | err = drv->resume(dev); |
c3c94c5a | 315 | |
9b847548 | 316 | scsi_device_resume(sdev); |
c3c94c5a | 317 | |
1dfcda06 | 318 | return err; |
9b847548 JA |
319 | } |
320 | ||
1da177e4 LT |
321 | struct bus_type scsi_bus_type = { |
322 | .name = "scsi", | |
323 | .match = scsi_bus_match, | |
d7b8bcb0 | 324 | .uevent = scsi_bus_uevent, |
9b847548 JA |
325 | .suspend = scsi_bus_suspend, |
326 | .resume = scsi_bus_resume, | |
1da177e4 LT |
327 | }; |
328 | ||
329 | int scsi_sysfs_register(void) | |
330 | { | |
331 | int error; | |
332 | ||
333 | error = bus_register(&scsi_bus_type); | |
334 | if (!error) { | |
335 | error = class_register(&sdev_class); | |
336 | if (error) | |
337 | bus_unregister(&scsi_bus_type); | |
338 | } | |
339 | ||
340 | return error; | |
341 | } | |
342 | ||
343 | void scsi_sysfs_unregister(void) | |
344 | { | |
345 | class_unregister(&sdev_class); | |
346 | bus_unregister(&scsi_bus_type); | |
347 | } | |
348 | ||
349 | /* | |
350 | * sdev_show_function: macro to create an attr function that can be used to | |
351 | * show a non-bit field. | |
352 | */ | |
353 | #define sdev_show_function(field, format_string) \ | |
354 | static ssize_t \ | |
10523b3b | 355 | sdev_show_##field (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
356 | { \ |
357 | struct scsi_device *sdev; \ | |
358 | sdev = to_scsi_device(dev); \ | |
359 | return snprintf (buf, 20, format_string, sdev->field); \ | |
360 | } \ | |
361 | ||
362 | /* | |
363 | * sdev_rd_attr: macro to create a function and attribute variable for a | |
364 | * read only field. | |
365 | */ | |
366 | #define sdev_rd_attr(field, format_string) \ | |
367 | sdev_show_function(field, format_string) \ | |
368 | static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); | |
369 | ||
370 | ||
371 | /* | |
372 | * sdev_rd_attr: create a function and attribute variable for a | |
373 | * read/write field. | |
374 | */ | |
375 | #define sdev_rw_attr(field, format_string) \ | |
376 | sdev_show_function(field, format_string) \ | |
377 | \ | |
378 | static ssize_t \ | |
10523b3b | 379 | sdev_store_##field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \ |
1da177e4 LT |
380 | { \ |
381 | struct scsi_device *sdev; \ | |
382 | sdev = to_scsi_device(dev); \ | |
383 | snscanf (buf, 20, format_string, &sdev->field); \ | |
384 | return count; \ | |
385 | } \ | |
386 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
387 | ||
388 | /* Currently we don't export bit fields, but we might in future, | |
389 | * so leave this code in */ | |
390 | #if 0 | |
391 | /* | |
392 | * sdev_rd_attr: create a function and attribute variable for a | |
393 | * read/write bit field. | |
394 | */ | |
395 | #define sdev_rw_attr_bit(field) \ | |
396 | sdev_show_function(field, "%d\n") \ | |
397 | \ | |
398 | static ssize_t \ | |
10523b3b | 399 | sdev_store_##field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \ |
1da177e4 LT |
400 | { \ |
401 | int ret; \ | |
402 | struct scsi_device *sdev; \ | |
403 | ret = scsi_sdev_check_buf_bit(buf); \ | |
404 | if (ret >= 0) { \ | |
405 | sdev = to_scsi_device(dev); \ | |
406 | sdev->field = ret; \ | |
407 | ret = count; \ | |
408 | } \ | |
409 | return ret; \ | |
410 | } \ | |
411 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
412 | ||
413 | /* | |
414 | * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", | |
415 | * else return -EINVAL. | |
416 | */ | |
417 | static int scsi_sdev_check_buf_bit(const char *buf) | |
418 | { | |
419 | if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { | |
420 | if (buf[0] == '1') | |
421 | return 1; | |
422 | else if (buf[0] == '0') | |
423 | return 0; | |
424 | else | |
425 | return -EINVAL; | |
426 | } else | |
427 | return -EINVAL; | |
428 | } | |
429 | #endif | |
430 | /* | |
431 | * Create the actual show/store functions and data structures. | |
432 | */ | |
433 | sdev_rd_attr (device_blocked, "%d\n"); | |
434 | sdev_rd_attr (queue_depth, "%d\n"); | |
435 | sdev_rd_attr (type, "%d\n"); | |
436 | sdev_rd_attr (scsi_level, "%d\n"); | |
437 | sdev_rd_attr (vendor, "%.8s\n"); | |
438 | sdev_rd_attr (model, "%.16s\n"); | |
439 | sdev_rd_attr (rev, "%.4s\n"); | |
440 | ||
441 | static ssize_t | |
10523b3b | 442 | sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
443 | { |
444 | struct scsi_device *sdev; | |
445 | sdev = to_scsi_device(dev); | |
446 | return snprintf (buf, 20, "%d\n", sdev->timeout / HZ); | |
447 | } | |
448 | ||
449 | static ssize_t | |
10523b3b | 450 | sdev_store_timeout (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
451 | { |
452 | struct scsi_device *sdev; | |
453 | int timeout; | |
454 | sdev = to_scsi_device(dev); | |
455 | sscanf (buf, "%d\n", &timeout); | |
456 | sdev->timeout = timeout * HZ; | |
457 | return count; | |
458 | } | |
459 | static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); | |
460 | ||
461 | static ssize_t | |
10523b3b | 462 | store_rescan_field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
463 | { |
464 | scsi_rescan_device(dev); | |
465 | return count; | |
466 | } | |
467 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); | |
468 | ||
d9a9cdfb AS |
469 | static void sdev_store_delete_callback(struct device *dev) |
470 | { | |
471 | scsi_remove_device(to_scsi_device(dev)); | |
472 | } | |
473 | ||
10523b3b | 474 | static ssize_t sdev_store_delete(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
475 | size_t count) |
476 | { | |
d9a9cdfb AS |
477 | int rc; |
478 | ||
479 | /* An attribute cannot be unregistered by one of its own methods, | |
480 | * so we have to use this roundabout approach. | |
481 | */ | |
482 | rc = device_schedule_callback(dev, sdev_store_delete_callback); | |
483 | if (rc) | |
484 | count = rc; | |
1da177e4 LT |
485 | return count; |
486 | }; | |
487 | static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); | |
488 | ||
489 | static ssize_t | |
10523b3b | 490 | store_state_field(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
491 | { |
492 | int i; | |
493 | struct scsi_device *sdev = to_scsi_device(dev); | |
494 | enum scsi_device_state state = 0; | |
495 | ||
6391a113 | 496 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
497 | const int len = strlen(sdev_states[i].name); |
498 | if (strncmp(sdev_states[i].name, buf, len) == 0 && | |
499 | buf[len] == '\n') { | |
500 | state = sdev_states[i].value; | |
501 | break; | |
502 | } | |
503 | } | |
504 | if (!state) | |
505 | return -EINVAL; | |
506 | ||
507 | if (scsi_device_set_state(sdev, state)) | |
508 | return -EINVAL; | |
509 | return count; | |
510 | } | |
511 | ||
512 | static ssize_t | |
10523b3b | 513 | show_state_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
514 | { |
515 | struct scsi_device *sdev = to_scsi_device(dev); | |
516 | const char *name = scsi_device_state_name(sdev->sdev_state); | |
517 | ||
518 | if (!name) | |
519 | return -EINVAL; | |
520 | ||
521 | return snprintf(buf, 20, "%s\n", name); | |
522 | } | |
523 | ||
524 | static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); | |
525 | ||
526 | static ssize_t | |
10523b3b | 527 | show_queue_type_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
528 | { |
529 | struct scsi_device *sdev = to_scsi_device(dev); | |
530 | const char *name = "none"; | |
531 | ||
532 | if (sdev->ordered_tags) | |
533 | name = "ordered"; | |
534 | else if (sdev->simple_tags) | |
535 | name = "simple"; | |
536 | ||
537 | return snprintf(buf, 20, "%s\n", name); | |
538 | } | |
539 | ||
540 | static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL); | |
541 | ||
542 | static ssize_t | |
10523b3b | 543 | show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
544 | { |
545 | return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); | |
546 | } | |
547 | ||
548 | static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); | |
549 | ||
550 | #define show_sdev_iostat(field) \ | |
551 | static ssize_t \ | |
10523b3b | 552 | show_iostat_##field(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
553 | { \ |
554 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
555 | unsigned long long count = atomic_read(&sdev->field); \ | |
556 | return snprintf(buf, 20, "0x%llx\n", count); \ | |
557 | } \ | |
558 | static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) | |
559 | ||
560 | show_sdev_iostat(iorequest_cnt); | |
561 | show_sdev_iostat(iodone_cnt); | |
562 | show_sdev_iostat(ioerr_cnt); | |
563 | ||
d7b8bcb0 MT |
564 | static ssize_t |
565 | sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf) | |
566 | { | |
567 | struct scsi_device *sdev; | |
568 | sdev = to_scsi_device(dev); | |
569 | return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type); | |
570 | } | |
571 | static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL); | |
1da177e4 LT |
572 | |
573 | /* Default template for device attributes. May NOT be modified */ | |
574 | static struct device_attribute *scsi_sysfs_sdev_attrs[] = { | |
575 | &dev_attr_device_blocked, | |
576 | &dev_attr_queue_depth, | |
577 | &dev_attr_queue_type, | |
578 | &dev_attr_type, | |
579 | &dev_attr_scsi_level, | |
580 | &dev_attr_vendor, | |
581 | &dev_attr_model, | |
582 | &dev_attr_rev, | |
583 | &dev_attr_rescan, | |
584 | &dev_attr_delete, | |
585 | &dev_attr_state, | |
586 | &dev_attr_timeout, | |
587 | &dev_attr_iocounterbits, | |
588 | &dev_attr_iorequest_cnt, | |
589 | &dev_attr_iodone_cnt, | |
590 | &dev_attr_ioerr_cnt, | |
d7b8bcb0 | 591 | &dev_attr_modalias, |
1da177e4 LT |
592 | NULL |
593 | }; | |
594 | ||
10523b3b | 595 | static ssize_t sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
596 | size_t count) |
597 | { | |
598 | int depth, retval; | |
599 | struct scsi_device *sdev = to_scsi_device(dev); | |
600 | struct scsi_host_template *sht = sdev->host->hostt; | |
601 | ||
602 | if (!sht->change_queue_depth) | |
603 | return -EINVAL; | |
604 | ||
605 | depth = simple_strtoul(buf, NULL, 0); | |
606 | ||
607 | if (depth < 1) | |
608 | return -EINVAL; | |
609 | ||
610 | retval = sht->change_queue_depth(sdev, depth); | |
611 | if (retval < 0) | |
612 | return retval; | |
613 | ||
614 | return count; | |
615 | } | |
616 | ||
617 | static struct device_attribute sdev_attr_queue_depth_rw = | |
618 | __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, | |
619 | sdev_store_queue_depth_rw); | |
620 | ||
10523b3b | 621 | static ssize_t sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
622 | size_t count) |
623 | { | |
624 | struct scsi_device *sdev = to_scsi_device(dev); | |
625 | struct scsi_host_template *sht = sdev->host->hostt; | |
626 | int tag_type = 0, retval; | |
627 | int prev_tag_type = scsi_get_tag_type(sdev); | |
628 | ||
629 | if (!sdev->tagged_supported || !sht->change_queue_type) | |
630 | return -EINVAL; | |
631 | ||
632 | if (strncmp(buf, "ordered", 7) == 0) | |
633 | tag_type = MSG_ORDERED_TAG; | |
634 | else if (strncmp(buf, "simple", 6) == 0) | |
635 | tag_type = MSG_SIMPLE_TAG; | |
636 | else if (strncmp(buf, "none", 4) != 0) | |
637 | return -EINVAL; | |
638 | ||
639 | if (tag_type == prev_tag_type) | |
640 | return count; | |
641 | ||
642 | retval = sht->change_queue_type(sdev, tag_type); | |
643 | if (retval < 0) | |
644 | return retval; | |
645 | ||
646 | return count; | |
647 | } | |
648 | ||
649 | static struct device_attribute sdev_attr_queue_type_rw = | |
650 | __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, | |
651 | sdev_store_queue_type_rw); | |
652 | ||
653 | static struct device_attribute *attr_changed_internally( | |
654 | struct Scsi_Host *shost, | |
655 | struct device_attribute * attr) | |
656 | { | |
657 | if (!strcmp("queue_depth", attr->attr.name) | |
658 | && shost->hostt->change_queue_depth) | |
659 | return &sdev_attr_queue_depth_rw; | |
660 | else if (!strcmp("queue_type", attr->attr.name) | |
661 | && shost->hostt->change_queue_type) | |
662 | return &sdev_attr_queue_type_rw; | |
663 | return attr; | |
664 | } | |
665 | ||
666 | ||
667 | static struct device_attribute *attr_overridden( | |
668 | struct device_attribute **attrs, | |
669 | struct device_attribute *attr) | |
670 | { | |
671 | int i; | |
672 | ||
673 | if (!attrs) | |
674 | return NULL; | |
675 | for (i = 0; attrs[i]; i++) | |
676 | if (!strcmp(attrs[i]->attr.name, attr->attr.name)) | |
677 | return attrs[i]; | |
678 | return NULL; | |
679 | } | |
680 | ||
681 | static int attr_add(struct device *dev, struct device_attribute *attr) | |
682 | { | |
683 | struct device_attribute *base_attr; | |
684 | ||
685 | /* | |
686 | * Spare the caller from having to copy things it's not interested in. | |
687 | */ | |
688 | base_attr = attr_overridden(scsi_sysfs_sdev_attrs, attr); | |
689 | if (base_attr) { | |
690 | /* extend permissions */ | |
691 | attr->attr.mode |= base_attr->attr.mode; | |
692 | ||
693 | /* override null show/store with default */ | |
694 | if (!attr->show) | |
695 | attr->show = base_attr->show; | |
696 | if (!attr->store) | |
697 | attr->store = base_attr->store; | |
698 | } | |
699 | ||
700 | return device_create_file(dev, attr); | |
701 | } | |
702 | ||
703 | /** | |
704 | * scsi_sysfs_add_sdev - add scsi device to sysfs | |
705 | * @sdev: scsi_device to add | |
706 | * | |
707 | * Return value: | |
708 | * 0 on Success / non-zero on Failure | |
709 | **/ | |
710 | int scsi_sysfs_add_sdev(struct scsi_device *sdev) | |
711 | { | |
712 | int error, i; | |
80ed71ce | 713 | struct request_queue *rq = sdev->request_queue; |
1da177e4 LT |
714 | |
715 | if ((error = scsi_device_set_state(sdev, SDEV_RUNNING)) != 0) | |
716 | return error; | |
717 | ||
718 | error = device_add(&sdev->sdev_gendev); | |
719 | if (error) { | |
720 | put_device(sdev->sdev_gendev.parent); | |
721 | printk(KERN_INFO "error 1\n"); | |
722 | return error; | |
723 | } | |
724 | error = class_device_add(&sdev->sdev_classdev); | |
725 | if (error) { | |
726 | printk(KERN_INFO "error 2\n"); | |
727 | goto clean_device; | |
728 | } | |
729 | ||
730 | /* take a reference for the sdev_classdev; this is | |
731 | * released by the sdev_class .release */ | |
732 | get_device(&sdev->sdev_gendev); | |
80ed71ce | 733 | |
39dca558 | 734 | error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL); |
80ed71ce JB |
735 | |
736 | if (error) | |
737 | sdev_printk(KERN_INFO, sdev, | |
738 | "Failed to register bsg queue, errno=%d\n", error); | |
739 | ||
740 | /* we're treating error on bsg register as non-fatal, so pretend | |
741 | * nothing went wrong */ | |
742 | error = 0; | |
743 | ||
1da177e4 LT |
744 | if (sdev->host->hostt->sdev_attrs) { |
745 | for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { | |
746 | error = attr_add(&sdev->sdev_gendev, | |
747 | sdev->host->hostt->sdev_attrs[i]); | |
748 | if (error) { | |
903f4fed | 749 | __scsi_remove_device(sdev); |
1da177e4 LT |
750 | goto out; |
751 | } | |
752 | } | |
753 | } | |
754 | ||
755 | for (i = 0; scsi_sysfs_sdev_attrs[i]; i++) { | |
756 | if (!attr_overridden(sdev->host->hostt->sdev_attrs, | |
757 | scsi_sysfs_sdev_attrs[i])) { | |
758 | struct device_attribute * attr = | |
759 | attr_changed_internally(sdev->host, | |
760 | scsi_sysfs_sdev_attrs[i]); | |
761 | error = device_create_file(&sdev->sdev_gendev, attr); | |
762 | if (error) { | |
903f4fed | 763 | __scsi_remove_device(sdev); |
1da177e4 LT |
764 | goto out; |
765 | } | |
766 | } | |
767 | } | |
768 | ||
769 | transport_add_device(&sdev->sdev_gendev); | |
770 | out: | |
771 | return error; | |
772 | ||
773 | clean_device: | |
774 | scsi_device_set_state(sdev, SDEV_CANCEL); | |
775 | ||
776 | device_del(&sdev->sdev_gendev); | |
777 | transport_destroy_device(&sdev->sdev_gendev); | |
778 | put_device(&sdev->sdev_gendev); | |
779 | ||
780 | return error; | |
781 | } | |
782 | ||
903f4fed | 783 | void __scsi_remove_device(struct scsi_device *sdev) |
1da177e4 | 784 | { |
df133c21 JB |
785 | struct device *dev = &sdev->sdev_gendev; |
786 | ||
1da177e4 | 787 | if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0) |
903f4fed | 788 | return; |
1da177e4 | 789 | |
80ed71ce | 790 | bsg_unregister_queue(sdev->request_queue); |
1da177e4 | 791 | class_device_unregister(&sdev->sdev_classdev); |
df133c21 JB |
792 | transport_remove_device(dev); |
793 | device_del(dev); | |
1da177e4 LT |
794 | scsi_device_set_state(sdev, SDEV_DEL); |
795 | if (sdev->host->hostt->slave_destroy) | |
796 | sdev->host->hostt->slave_destroy(sdev); | |
df133c21 JB |
797 | transport_destroy_device(dev); |
798 | put_device(dev); | |
903f4fed AS |
799 | } |
800 | ||
801 | /** | |
802 | * scsi_remove_device - unregister a device from the scsi bus | |
803 | * @sdev: scsi_device to unregister | |
804 | **/ | |
805 | void scsi_remove_device(struct scsi_device *sdev) | |
806 | { | |
54195002 AS |
807 | struct Scsi_Host *shost = sdev->host; |
808 | ||
0b950672 | 809 | mutex_lock(&shost->scan_mutex); |
903f4fed | 810 | __scsi_remove_device(sdev); |
0b950672 | 811 | mutex_unlock(&shost->scan_mutex); |
1da177e4 LT |
812 | } |
813 | EXPORT_SYMBOL(scsi_remove_device); | |
814 | ||
44818efb | 815 | static void __scsi_remove_target(struct scsi_target *starget) |
1da177e4 LT |
816 | { |
817 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
818 | unsigned long flags; | |
a64358db | 819 | struct scsi_device *sdev; |
1da177e4 LT |
820 | |
821 | spin_lock_irqsave(shost->host_lock, flags); | |
822 | starget->reap_ref++; | |
a64358db AS |
823 | restart: |
824 | list_for_each_entry(sdev, &shost->__devices, siblings) { | |
1da177e4 | 825 | if (sdev->channel != starget->channel || |
a64358db AS |
826 | sdev->id != starget->id || |
827 | sdev->sdev_state == SDEV_DEL) | |
1da177e4 LT |
828 | continue; |
829 | spin_unlock_irqrestore(shost->host_lock, flags); | |
830 | scsi_remove_device(sdev); | |
831 | spin_lock_irqsave(shost->host_lock, flags); | |
a64358db | 832 | goto restart; |
1da177e4 LT |
833 | } |
834 | spin_unlock_irqrestore(shost->host_lock, flags); | |
835 | scsi_target_reap(starget); | |
836 | } | |
837 | ||
20b1e674 PM |
838 | static int __remove_child (struct device * dev, void * data) |
839 | { | |
840 | if (scsi_is_target_device(dev)) | |
841 | __scsi_remove_target(to_scsi_target(dev)); | |
842 | return 0; | |
843 | } | |
844 | ||
1da177e4 LT |
845 | /** |
846 | * scsi_remove_target - try to remove a target and all its devices | |
847 | * @dev: generic starget or parent of generic stargets to be removed | |
848 | * | |
849 | * Note: This is slightly racy. It is possible that if the user | |
850 | * requests the addition of another device then the target won't be | |
851 | * removed. | |
852 | */ | |
853 | void scsi_remove_target(struct device *dev) | |
854 | { | |
20b1e674 | 855 | struct device *rdev; |
1da177e4 LT |
856 | |
857 | if (scsi_is_target_device(dev)) { | |
858 | __scsi_remove_target(to_scsi_target(dev)); | |
859 | return; | |
860 | } | |
861 | ||
862 | rdev = get_device(dev); | |
20b1e674 | 863 | device_for_each_child(dev, NULL, __remove_child); |
1da177e4 LT |
864 | put_device(rdev); |
865 | } | |
866 | EXPORT_SYMBOL(scsi_remove_target); | |
867 | ||
868 | int scsi_register_driver(struct device_driver *drv) | |
869 | { | |
870 | drv->bus = &scsi_bus_type; | |
871 | ||
872 | return driver_register(drv); | |
873 | } | |
874 | EXPORT_SYMBOL(scsi_register_driver); | |
875 | ||
876 | int scsi_register_interface(struct class_interface *intf) | |
877 | { | |
878 | intf->class = &sdev_class; | |
879 | ||
880 | return class_interface_register(intf); | |
881 | } | |
882 | EXPORT_SYMBOL(scsi_register_interface); | |
883 | ||
884 | ||
885 | static struct class_device_attribute *class_attr_overridden( | |
886 | struct class_device_attribute **attrs, | |
887 | struct class_device_attribute *attr) | |
888 | { | |
889 | int i; | |
890 | ||
891 | if (!attrs) | |
892 | return NULL; | |
893 | for (i = 0; attrs[i]; i++) | |
894 | if (!strcmp(attrs[i]->attr.name, attr->attr.name)) | |
895 | return attrs[i]; | |
896 | return NULL; | |
897 | } | |
898 | ||
899 | static int class_attr_add(struct class_device *classdev, | |
900 | struct class_device_attribute *attr) | |
901 | { | |
902 | struct class_device_attribute *base_attr; | |
903 | ||
904 | /* | |
905 | * Spare the caller from having to copy things it's not interested in. | |
906 | */ | |
907 | base_attr = class_attr_overridden(scsi_sysfs_shost_attrs, attr); | |
908 | if (base_attr) { | |
909 | /* extend permissions */ | |
910 | attr->attr.mode |= base_attr->attr.mode; | |
911 | ||
912 | /* override null show/store with default */ | |
913 | if (!attr->show) | |
914 | attr->show = base_attr->show; | |
915 | if (!attr->store) | |
916 | attr->store = base_attr->store; | |
917 | } | |
918 | ||
919 | return class_device_create_file(classdev, attr); | |
920 | } | |
921 | ||
922 | /** | |
923 | * scsi_sysfs_add_host - add scsi host to subsystem | |
924 | * @shost: scsi host struct to add to subsystem | |
925 | * @dev: parent struct device pointer | |
926 | **/ | |
927 | int scsi_sysfs_add_host(struct Scsi_Host *shost) | |
928 | { | |
929 | int error, i; | |
930 | ||
931 | if (shost->hostt->shost_attrs) { | |
932 | for (i = 0; shost->hostt->shost_attrs[i]; i++) { | |
933 | error = class_attr_add(&shost->shost_classdev, | |
934 | shost->hostt->shost_attrs[i]); | |
935 | if (error) | |
936 | return error; | |
937 | } | |
938 | } | |
939 | ||
940 | for (i = 0; scsi_sysfs_shost_attrs[i]; i++) { | |
941 | if (!class_attr_overridden(shost->hostt->shost_attrs, | |
942 | scsi_sysfs_shost_attrs[i])) { | |
943 | error = class_device_create_file(&shost->shost_classdev, | |
944 | scsi_sysfs_shost_attrs[i]); | |
945 | if (error) | |
946 | return error; | |
947 | } | |
948 | } | |
949 | ||
950 | transport_register_device(&shost->shost_gendev); | |
951 | return 0; | |
952 | } | |
953 | ||
954 | void scsi_sysfs_device_initialize(struct scsi_device *sdev) | |
955 | { | |
956 | unsigned long flags; | |
957 | struct Scsi_Host *shost = sdev->host; | |
958 | struct scsi_target *starget = sdev->sdev_target; | |
959 | ||
960 | device_initialize(&sdev->sdev_gendev); | |
961 | sdev->sdev_gendev.bus = &scsi_bus_type; | |
962 | sdev->sdev_gendev.release = scsi_device_dev_release; | |
963 | sprintf(sdev->sdev_gendev.bus_id,"%d:%d:%d:%d", | |
964 | sdev->host->host_no, sdev->channel, sdev->id, | |
965 | sdev->lun); | |
966 | ||
967 | class_device_initialize(&sdev->sdev_classdev); | |
968 | sdev->sdev_classdev.dev = &sdev->sdev_gendev; | |
969 | sdev->sdev_classdev.class = &sdev_class; | |
970 | snprintf(sdev->sdev_classdev.class_id, BUS_ID_SIZE, | |
971 | "%d:%d:%d:%d", sdev->host->host_no, | |
972 | sdev->channel, sdev->id, sdev->lun); | |
7c9d6f16 | 973 | sdev->scsi_level = starget->scsi_level; |
1da177e4 LT |
974 | transport_setup_device(&sdev->sdev_gendev); |
975 | spin_lock_irqsave(shost->host_lock, flags); | |
976 | list_add_tail(&sdev->same_target_siblings, &starget->devices); | |
977 | list_add_tail(&sdev->siblings, &shost->__devices); | |
978 | spin_unlock_irqrestore(shost->host_lock, flags); | |
979 | } | |
980 | ||
981 | int scsi_is_sdev_device(const struct device *dev) | |
982 | { | |
983 | return dev->release == scsi_device_dev_release; | |
984 | } | |
985 | EXPORT_SYMBOL(scsi_is_sdev_device); | |
986 | ||
987 | /* A blank transport template that is used in drivers that don't | |
988 | * yet implement Transport Attributes */ | |
989 | struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |