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> | |
19 | ||
20 | #include "scsi_priv.h" | |
21 | #include "scsi_logging.h" | |
22 | ||
0ad78200 | 23 | static const struct { |
1da177e4 LT |
24 | enum scsi_device_state value; |
25 | char *name; | |
26 | } sdev_states[] = { | |
27 | { SDEV_CREATED, "created" }, | |
28 | { SDEV_RUNNING, "running" }, | |
29 | { SDEV_CANCEL, "cancel" }, | |
30 | { SDEV_DEL, "deleted" }, | |
31 | { SDEV_QUIESCE, "quiesce" }, | |
32 | { SDEV_OFFLINE, "offline" }, | |
33 | { SDEV_BLOCK, "blocked" }, | |
34 | }; | |
35 | ||
36 | const char *scsi_device_state_name(enum scsi_device_state state) | |
37 | { | |
38 | int i; | |
39 | char *name = NULL; | |
40 | ||
6391a113 | 41 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
42 | if (sdev_states[i].value == state) { |
43 | name = sdev_states[i].name; | |
44 | break; | |
45 | } | |
46 | } | |
47 | return name; | |
48 | } | |
49 | ||
0ad78200 | 50 | static const struct { |
d3301874 MA |
51 | enum scsi_host_state value; |
52 | char *name; | |
53 | } shost_states[] = { | |
54 | { SHOST_CREATED, "created" }, | |
55 | { SHOST_RUNNING, "running" }, | |
56 | { SHOST_CANCEL, "cancel" }, | |
57 | { SHOST_DEL, "deleted" }, | |
58 | { SHOST_RECOVERY, "recovery" }, | |
939647ee JB |
59 | { SHOST_CANCEL_RECOVERY, "cancel/recovery" }, |
60 | { SHOST_DEL_RECOVERY, "deleted/recovery", }, | |
d3301874 MA |
61 | }; |
62 | const char *scsi_host_state_name(enum scsi_host_state state) | |
63 | { | |
64 | int i; | |
65 | char *name = NULL; | |
66 | ||
6391a113 | 67 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
68 | if (shost_states[i].value == state) { |
69 | name = shost_states[i].name; | |
70 | break; | |
71 | } | |
72 | } | |
73 | return name; | |
74 | } | |
75 | ||
1da177e4 LT |
76 | static int check_set(unsigned int *val, char *src) |
77 | { | |
78 | char *last; | |
79 | ||
80 | if (strncmp(src, "-", 20) == 0) { | |
81 | *val = SCAN_WILD_CARD; | |
82 | } else { | |
83 | /* | |
84 | * Doesn't check for int overflow | |
85 | */ | |
86 | *val = simple_strtoul(src, &last, 0); | |
87 | if (*last != '\0') | |
88 | return 1; | |
89 | } | |
90 | return 0; | |
91 | } | |
92 | ||
93 | static int scsi_scan(struct Scsi_Host *shost, const char *str) | |
94 | { | |
95 | char s1[15], s2[15], s3[15], junk; | |
96 | unsigned int channel, id, lun; | |
97 | int res; | |
98 | ||
99 | res = sscanf(str, "%10s %10s %10s %c", s1, s2, s3, &junk); | |
100 | if (res != 3) | |
101 | return -EINVAL; | |
102 | if (check_set(&channel, s1)) | |
103 | return -EINVAL; | |
104 | if (check_set(&id, s2)) | |
105 | return -EINVAL; | |
106 | if (check_set(&lun, s3)) | |
107 | return -EINVAL; | |
e02f3f59 CH |
108 | if (shost->transportt->user_scan) |
109 | res = shost->transportt->user_scan(shost, channel, id, lun); | |
110 | else | |
111 | res = scsi_scan_host_selected(shost, channel, id, lun, 1); | |
1da177e4 LT |
112 | return res; |
113 | } | |
114 | ||
115 | /* | |
116 | * shost_show_function: macro to create an attr function that can be used to | |
117 | * show a non-bit field. | |
118 | */ | |
119 | #define shost_show_function(name, field, format_string) \ | |
120 | static ssize_t \ | |
121 | show_##name (struct class_device *class_dev, char *buf) \ | |
122 | { \ | |
123 | struct Scsi_Host *shost = class_to_shost(class_dev); \ | |
124 | return snprintf (buf, 20, format_string, shost->field); \ | |
125 | } | |
126 | ||
127 | /* | |
128 | * shost_rd_attr: macro to create a function and attribute variable for a | |
129 | * read only field. | |
130 | */ | |
131 | #define shost_rd_attr2(name, field, format_string) \ | |
132 | shost_show_function(name, field, format_string) \ | |
133 | static CLASS_DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); | |
134 | ||
135 | #define shost_rd_attr(field, format_string) \ | |
136 | shost_rd_attr2(field, field, format_string) | |
137 | ||
138 | /* | |
139 | * Create the actual show/store functions and data structures. | |
140 | */ | |
141 | ||
142 | static ssize_t store_scan(struct class_device *class_dev, const char *buf, | |
143 | size_t count) | |
144 | { | |
145 | struct Scsi_Host *shost = class_to_shost(class_dev); | |
146 | int res; | |
147 | ||
148 | res = scsi_scan(shost, buf); | |
149 | if (res == 0) | |
150 | res = count; | |
151 | return res; | |
152 | }; | |
153 | static CLASS_DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); | |
154 | ||
d3301874 MA |
155 | static ssize_t |
156 | store_shost_state(struct class_device *class_dev, const char *buf, size_t count) | |
157 | { | |
158 | int i; | |
159 | struct Scsi_Host *shost = class_to_shost(class_dev); | |
160 | enum scsi_host_state state = 0; | |
161 | ||
6391a113 | 162 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
163 | const int len = strlen(shost_states[i].name); |
164 | if (strncmp(shost_states[i].name, buf, len) == 0 && | |
165 | buf[len] == '\n') { | |
166 | state = shost_states[i].value; | |
167 | break; | |
168 | } | |
169 | } | |
170 | if (!state) | |
171 | return -EINVAL; | |
172 | ||
173 | if (scsi_host_set_state(shost, state)) | |
174 | return -EINVAL; | |
175 | return count; | |
176 | } | |
177 | ||
178 | static ssize_t | |
179 | show_shost_state(struct class_device *class_dev, char *buf) | |
180 | { | |
181 | struct Scsi_Host *shost = class_to_shost(class_dev); | |
182 | const char *name = scsi_host_state_name(shost->shost_state); | |
183 | ||
184 | if (!name) | |
185 | return -EINVAL; | |
186 | ||
187 | return snprintf(buf, 20, "%s\n", name); | |
188 | } | |
189 | ||
190 | static CLASS_DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state); | |
191 | ||
1da177e4 LT |
192 | shost_rd_attr(unique_id, "%u\n"); |
193 | shost_rd_attr(host_busy, "%hu\n"); | |
194 | shost_rd_attr(cmd_per_lun, "%hd\n"); | |
ed632da8 | 195 | shost_rd_attr(can_queue, "%hd\n"); |
1da177e4 LT |
196 | shost_rd_attr(sg_tablesize, "%hu\n"); |
197 | shost_rd_attr(unchecked_isa_dma, "%d\n"); | |
198 | shost_rd_attr2(proc_name, hostt->proc_name, "%s\n"); | |
199 | ||
200 | static struct class_device_attribute *scsi_sysfs_shost_attrs[] = { | |
201 | &class_device_attr_unique_id, | |
202 | &class_device_attr_host_busy, | |
203 | &class_device_attr_cmd_per_lun, | |
ed632da8 | 204 | &class_device_attr_can_queue, |
1da177e4 LT |
205 | &class_device_attr_sg_tablesize, |
206 | &class_device_attr_unchecked_isa_dma, | |
207 | &class_device_attr_proc_name, | |
208 | &class_device_attr_scan, | |
d3301874 | 209 | &class_device_attr_state, |
1da177e4 LT |
210 | NULL |
211 | }; | |
212 | ||
213 | static void scsi_device_cls_release(struct class_device *class_dev) | |
214 | { | |
215 | struct scsi_device *sdev; | |
216 | ||
217 | sdev = class_to_sdev(class_dev); | |
218 | put_device(&sdev->sdev_gendev); | |
219 | } | |
220 | ||
65f27f38 | 221 | static void scsi_device_dev_release_usercontext(struct work_struct *work) |
1da177e4 LT |
222 | { |
223 | struct scsi_device *sdev; | |
224 | struct device *parent; | |
225 | struct scsi_target *starget; | |
226 | unsigned long flags; | |
227 | ||
65f27f38 DH |
228 | sdev = container_of(work, struct scsi_device, ew.work); |
229 | ||
230 | parent = sdev->sdev_gendev.parent; | |
1da177e4 LT |
231 | starget = to_scsi_target(parent); |
232 | ||
233 | spin_lock_irqsave(sdev->host->host_lock, flags); | |
234 | starget->reap_ref++; | |
235 | list_del(&sdev->siblings); | |
236 | list_del(&sdev->same_target_siblings); | |
237 | list_del(&sdev->starved_entry); | |
238 | spin_unlock_irqrestore(sdev->host->host_lock, flags); | |
239 | ||
240 | if (sdev->request_queue) { | |
241 | sdev->request_queue->queuedata = NULL; | |
65110b21 | 242 | /* user context needed to free queue */ |
1da177e4 | 243 | scsi_free_queue(sdev->request_queue); |
c2a9331c | 244 | /* temporary expedient, try to catch use of queue lock |
245 | * after free of sdev */ | |
246 | sdev->request_queue = NULL; | |
1da177e4 LT |
247 | } |
248 | ||
249 | scsi_target_reap(scsi_target(sdev)); | |
250 | ||
251 | kfree(sdev->inquiry); | |
252 | kfree(sdev); | |
253 | ||
254 | if (parent) | |
255 | put_device(parent); | |
256 | } | |
257 | ||
65110b21 JB |
258 | static void scsi_device_dev_release(struct device *dev) |
259 | { | |
ffedb452 | 260 | struct scsi_device *sdp = to_scsi_device(dev); |
65f27f38 | 261 | execute_in_process_context(scsi_device_dev_release_usercontext, |
ffedb452 | 262 | &sdp->ew); |
65110b21 JB |
263 | } |
264 | ||
52c1da39 | 265 | static struct class sdev_class = { |
1da177e4 LT |
266 | .name = "scsi_device", |
267 | .release = scsi_device_cls_release, | |
268 | }; | |
269 | ||
270 | /* all probing is done in the individual ->probe routines */ | |
271 | static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) | |
272 | { | |
273 | struct scsi_device *sdp = to_scsi_device(dev); | |
274 | if (sdp->no_uld_attach) | |
275 | return 0; | |
276 | return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; | |
277 | } | |
278 | ||
d7b8bcb0 MT |
279 | static int scsi_bus_uevent(struct device *dev, char **envp, int num_envp, |
280 | char *buffer, int buffer_size) | |
281 | { | |
282 | struct scsi_device *sdev = to_scsi_device(dev); | |
283 | int i = 0; | |
284 | int length = 0; | |
285 | ||
286 | add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length, | |
287 | "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type); | |
288 | envp[i] = NULL; | |
289 | return 0; | |
290 | } | |
291 | ||
9b847548 JA |
292 | static int scsi_bus_suspend(struct device * dev, pm_message_t state) |
293 | { | |
c3c94c5a | 294 | struct device_driver *drv = dev->driver; |
9b847548 JA |
295 | struct scsi_device *sdev = to_scsi_device(dev); |
296 | struct scsi_host_template *sht = sdev->host->hostt; | |
297 | int err; | |
298 | ||
299 | err = scsi_device_quiesce(sdev); | |
300 | if (err) | |
301 | return err; | |
302 | ||
c3c94c5a TH |
303 | /* call HLD suspend first */ |
304 | if (drv && drv->suspend) { | |
305 | err = drv->suspend(dev, state); | |
306 | if (err) | |
307 | return err; | |
308 | } | |
309 | ||
310 | /* then, call host suspend */ | |
311 | if (sht->suspend) { | |
082776e4 | 312 | err = sht->suspend(sdev, state); |
c3c94c5a TH |
313 | if (err) { |
314 | if (drv && drv->resume) | |
315 | drv->resume(dev); | |
316 | return err; | |
317 | } | |
318 | } | |
9b847548 | 319 | |
c3c94c5a | 320 | return 0; |
9b847548 JA |
321 | } |
322 | ||
323 | static int scsi_bus_resume(struct device * dev) | |
324 | { | |
c3c94c5a | 325 | struct device_driver *drv = dev->driver; |
9b847548 JA |
326 | struct scsi_device *sdev = to_scsi_device(dev); |
327 | struct scsi_host_template *sht = sdev->host->hostt; | |
c3c94c5a | 328 | int err = 0, err2 = 0; |
9b847548 | 329 | |
c3c94c5a | 330 | /* call host resume first */ |
9b847548 JA |
331 | if (sht->resume) |
332 | err = sht->resume(sdev); | |
333 | ||
c3c94c5a TH |
334 | /* then, call HLD resume */ |
335 | if (drv && drv->resume) | |
336 | err2 = drv->resume(dev); | |
337 | ||
9b847548 | 338 | scsi_device_resume(sdev); |
c3c94c5a TH |
339 | |
340 | /* favor LLD failure */ | |
341 | return err ? err : err2;; | |
9b847548 JA |
342 | } |
343 | ||
1da177e4 LT |
344 | struct bus_type scsi_bus_type = { |
345 | .name = "scsi", | |
346 | .match = scsi_bus_match, | |
d7b8bcb0 | 347 | .uevent = scsi_bus_uevent, |
9b847548 JA |
348 | .suspend = scsi_bus_suspend, |
349 | .resume = scsi_bus_resume, | |
1da177e4 LT |
350 | }; |
351 | ||
352 | int scsi_sysfs_register(void) | |
353 | { | |
354 | int error; | |
355 | ||
356 | error = bus_register(&scsi_bus_type); | |
357 | if (!error) { | |
358 | error = class_register(&sdev_class); | |
359 | if (error) | |
360 | bus_unregister(&scsi_bus_type); | |
361 | } | |
362 | ||
363 | return error; | |
364 | } | |
365 | ||
366 | void scsi_sysfs_unregister(void) | |
367 | { | |
368 | class_unregister(&sdev_class); | |
369 | bus_unregister(&scsi_bus_type); | |
370 | } | |
371 | ||
372 | /* | |
373 | * sdev_show_function: macro to create an attr function that can be used to | |
374 | * show a non-bit field. | |
375 | */ | |
376 | #define sdev_show_function(field, format_string) \ | |
377 | static ssize_t \ | |
10523b3b | 378 | sdev_show_##field (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
379 | { \ |
380 | struct scsi_device *sdev; \ | |
381 | sdev = to_scsi_device(dev); \ | |
382 | return snprintf (buf, 20, format_string, sdev->field); \ | |
383 | } \ | |
384 | ||
385 | /* | |
386 | * sdev_rd_attr: macro to create a function and attribute variable for a | |
387 | * read only field. | |
388 | */ | |
389 | #define sdev_rd_attr(field, format_string) \ | |
390 | sdev_show_function(field, format_string) \ | |
391 | static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); | |
392 | ||
393 | ||
394 | /* | |
395 | * sdev_rd_attr: create a function and attribute variable for a | |
396 | * read/write field. | |
397 | */ | |
398 | #define sdev_rw_attr(field, format_string) \ | |
399 | sdev_show_function(field, format_string) \ | |
400 | \ | |
401 | static ssize_t \ | |
10523b3b | 402 | sdev_store_##field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \ |
1da177e4 LT |
403 | { \ |
404 | struct scsi_device *sdev; \ | |
405 | sdev = to_scsi_device(dev); \ | |
406 | snscanf (buf, 20, format_string, &sdev->field); \ | |
407 | return count; \ | |
408 | } \ | |
409 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
410 | ||
411 | /* Currently we don't export bit fields, but we might in future, | |
412 | * so leave this code in */ | |
413 | #if 0 | |
414 | /* | |
415 | * sdev_rd_attr: create a function and attribute variable for a | |
416 | * read/write bit field. | |
417 | */ | |
418 | #define sdev_rw_attr_bit(field) \ | |
419 | sdev_show_function(field, "%d\n") \ | |
420 | \ | |
421 | static ssize_t \ | |
10523b3b | 422 | sdev_store_##field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \ |
1da177e4 LT |
423 | { \ |
424 | int ret; \ | |
425 | struct scsi_device *sdev; \ | |
426 | ret = scsi_sdev_check_buf_bit(buf); \ | |
427 | if (ret >= 0) { \ | |
428 | sdev = to_scsi_device(dev); \ | |
429 | sdev->field = ret; \ | |
430 | ret = count; \ | |
431 | } \ | |
432 | return ret; \ | |
433 | } \ | |
434 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
435 | ||
436 | /* | |
437 | * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", | |
438 | * else return -EINVAL. | |
439 | */ | |
440 | static int scsi_sdev_check_buf_bit(const char *buf) | |
441 | { | |
442 | if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { | |
443 | if (buf[0] == '1') | |
444 | return 1; | |
445 | else if (buf[0] == '0') | |
446 | return 0; | |
447 | else | |
448 | return -EINVAL; | |
449 | } else | |
450 | return -EINVAL; | |
451 | } | |
452 | #endif | |
453 | /* | |
454 | * Create the actual show/store functions and data structures. | |
455 | */ | |
456 | sdev_rd_attr (device_blocked, "%d\n"); | |
457 | sdev_rd_attr (queue_depth, "%d\n"); | |
458 | sdev_rd_attr (type, "%d\n"); | |
459 | sdev_rd_attr (scsi_level, "%d\n"); | |
460 | sdev_rd_attr (vendor, "%.8s\n"); | |
461 | sdev_rd_attr (model, "%.16s\n"); | |
462 | sdev_rd_attr (rev, "%.4s\n"); | |
463 | ||
464 | static ssize_t | |
10523b3b | 465 | sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
466 | { |
467 | struct scsi_device *sdev; | |
468 | sdev = to_scsi_device(dev); | |
469 | return snprintf (buf, 20, "%d\n", sdev->timeout / HZ); | |
470 | } | |
471 | ||
472 | static ssize_t | |
10523b3b | 473 | sdev_store_timeout (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
474 | { |
475 | struct scsi_device *sdev; | |
476 | int timeout; | |
477 | sdev = to_scsi_device(dev); | |
478 | sscanf (buf, "%d\n", &timeout); | |
479 | sdev->timeout = timeout * HZ; | |
480 | return count; | |
481 | } | |
482 | static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); | |
483 | ||
484 | static ssize_t | |
10523b3b | 485 | store_rescan_field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
486 | { |
487 | scsi_rescan_device(dev); | |
488 | return count; | |
489 | } | |
490 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); | |
491 | ||
d9a9cdfb AS |
492 | static void sdev_store_delete_callback(struct device *dev) |
493 | { | |
494 | scsi_remove_device(to_scsi_device(dev)); | |
495 | } | |
496 | ||
10523b3b | 497 | static ssize_t sdev_store_delete(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
498 | size_t count) |
499 | { | |
d9a9cdfb AS |
500 | int rc; |
501 | ||
502 | /* An attribute cannot be unregistered by one of its own methods, | |
503 | * so we have to use this roundabout approach. | |
504 | */ | |
505 | rc = device_schedule_callback(dev, sdev_store_delete_callback); | |
506 | if (rc) | |
507 | count = rc; | |
1da177e4 LT |
508 | return count; |
509 | }; | |
510 | static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); | |
511 | ||
512 | static ssize_t | |
10523b3b | 513 | store_state_field(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
514 | { |
515 | int i; | |
516 | struct scsi_device *sdev = to_scsi_device(dev); | |
517 | enum scsi_device_state state = 0; | |
518 | ||
6391a113 | 519 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
520 | const int len = strlen(sdev_states[i].name); |
521 | if (strncmp(sdev_states[i].name, buf, len) == 0 && | |
522 | buf[len] == '\n') { | |
523 | state = sdev_states[i].value; | |
524 | break; | |
525 | } | |
526 | } | |
527 | if (!state) | |
528 | return -EINVAL; | |
529 | ||
530 | if (scsi_device_set_state(sdev, state)) | |
531 | return -EINVAL; | |
532 | return count; | |
533 | } | |
534 | ||
535 | static ssize_t | |
10523b3b | 536 | show_state_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
537 | { |
538 | struct scsi_device *sdev = to_scsi_device(dev); | |
539 | const char *name = scsi_device_state_name(sdev->sdev_state); | |
540 | ||
541 | if (!name) | |
542 | return -EINVAL; | |
543 | ||
544 | return snprintf(buf, 20, "%s\n", name); | |
545 | } | |
546 | ||
547 | static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); | |
548 | ||
549 | static ssize_t | |
10523b3b | 550 | show_queue_type_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
551 | { |
552 | struct scsi_device *sdev = to_scsi_device(dev); | |
553 | const char *name = "none"; | |
554 | ||
555 | if (sdev->ordered_tags) | |
556 | name = "ordered"; | |
557 | else if (sdev->simple_tags) | |
558 | name = "simple"; | |
559 | ||
560 | return snprintf(buf, 20, "%s\n", name); | |
561 | } | |
562 | ||
563 | static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL); | |
564 | ||
565 | static ssize_t | |
10523b3b | 566 | show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
567 | { |
568 | return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); | |
569 | } | |
570 | ||
571 | static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); | |
572 | ||
573 | #define show_sdev_iostat(field) \ | |
574 | static ssize_t \ | |
10523b3b | 575 | show_iostat_##field(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
576 | { \ |
577 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
578 | unsigned long long count = atomic_read(&sdev->field); \ | |
579 | return snprintf(buf, 20, "0x%llx\n", count); \ | |
580 | } \ | |
581 | static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) | |
582 | ||
583 | show_sdev_iostat(iorequest_cnt); | |
584 | show_sdev_iostat(iodone_cnt); | |
585 | show_sdev_iostat(ioerr_cnt); | |
586 | ||
d7b8bcb0 MT |
587 | static ssize_t |
588 | sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf) | |
589 | { | |
590 | struct scsi_device *sdev; | |
591 | sdev = to_scsi_device(dev); | |
592 | return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type); | |
593 | } | |
594 | static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL); | |
1da177e4 LT |
595 | |
596 | /* Default template for device attributes. May NOT be modified */ | |
597 | static struct device_attribute *scsi_sysfs_sdev_attrs[] = { | |
598 | &dev_attr_device_blocked, | |
599 | &dev_attr_queue_depth, | |
600 | &dev_attr_queue_type, | |
601 | &dev_attr_type, | |
602 | &dev_attr_scsi_level, | |
603 | &dev_attr_vendor, | |
604 | &dev_attr_model, | |
605 | &dev_attr_rev, | |
606 | &dev_attr_rescan, | |
607 | &dev_attr_delete, | |
608 | &dev_attr_state, | |
609 | &dev_attr_timeout, | |
610 | &dev_attr_iocounterbits, | |
611 | &dev_attr_iorequest_cnt, | |
612 | &dev_attr_iodone_cnt, | |
613 | &dev_attr_ioerr_cnt, | |
d7b8bcb0 | 614 | &dev_attr_modalias, |
1da177e4 LT |
615 | NULL |
616 | }; | |
617 | ||
10523b3b | 618 | static ssize_t sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
619 | size_t count) |
620 | { | |
621 | int depth, retval; | |
622 | struct scsi_device *sdev = to_scsi_device(dev); | |
623 | struct scsi_host_template *sht = sdev->host->hostt; | |
624 | ||
625 | if (!sht->change_queue_depth) | |
626 | return -EINVAL; | |
627 | ||
628 | depth = simple_strtoul(buf, NULL, 0); | |
629 | ||
630 | if (depth < 1) | |
631 | return -EINVAL; | |
632 | ||
633 | retval = sht->change_queue_depth(sdev, depth); | |
634 | if (retval < 0) | |
635 | return retval; | |
636 | ||
637 | return count; | |
638 | } | |
639 | ||
640 | static struct device_attribute sdev_attr_queue_depth_rw = | |
641 | __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, | |
642 | sdev_store_queue_depth_rw); | |
643 | ||
10523b3b | 644 | static ssize_t sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
645 | size_t count) |
646 | { | |
647 | struct scsi_device *sdev = to_scsi_device(dev); | |
648 | struct scsi_host_template *sht = sdev->host->hostt; | |
649 | int tag_type = 0, retval; | |
650 | int prev_tag_type = scsi_get_tag_type(sdev); | |
651 | ||
652 | if (!sdev->tagged_supported || !sht->change_queue_type) | |
653 | return -EINVAL; | |
654 | ||
655 | if (strncmp(buf, "ordered", 7) == 0) | |
656 | tag_type = MSG_ORDERED_TAG; | |
657 | else if (strncmp(buf, "simple", 6) == 0) | |
658 | tag_type = MSG_SIMPLE_TAG; | |
659 | else if (strncmp(buf, "none", 4) != 0) | |
660 | return -EINVAL; | |
661 | ||
662 | if (tag_type == prev_tag_type) | |
663 | return count; | |
664 | ||
665 | retval = sht->change_queue_type(sdev, tag_type); | |
666 | if (retval < 0) | |
667 | return retval; | |
668 | ||
669 | return count; | |
670 | } | |
671 | ||
672 | static struct device_attribute sdev_attr_queue_type_rw = | |
673 | __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, | |
674 | sdev_store_queue_type_rw); | |
675 | ||
676 | static struct device_attribute *attr_changed_internally( | |
677 | struct Scsi_Host *shost, | |
678 | struct device_attribute * attr) | |
679 | { | |
680 | if (!strcmp("queue_depth", attr->attr.name) | |
681 | && shost->hostt->change_queue_depth) | |
682 | return &sdev_attr_queue_depth_rw; | |
683 | else if (!strcmp("queue_type", attr->attr.name) | |
684 | && shost->hostt->change_queue_type) | |
685 | return &sdev_attr_queue_type_rw; | |
686 | return attr; | |
687 | } | |
688 | ||
689 | ||
690 | static struct device_attribute *attr_overridden( | |
691 | struct device_attribute **attrs, | |
692 | struct device_attribute *attr) | |
693 | { | |
694 | int i; | |
695 | ||
696 | if (!attrs) | |
697 | return NULL; | |
698 | for (i = 0; attrs[i]; i++) | |
699 | if (!strcmp(attrs[i]->attr.name, attr->attr.name)) | |
700 | return attrs[i]; | |
701 | return NULL; | |
702 | } | |
703 | ||
704 | static int attr_add(struct device *dev, struct device_attribute *attr) | |
705 | { | |
706 | struct device_attribute *base_attr; | |
707 | ||
708 | /* | |
709 | * Spare the caller from having to copy things it's not interested in. | |
710 | */ | |
711 | base_attr = attr_overridden(scsi_sysfs_sdev_attrs, attr); | |
712 | if (base_attr) { | |
713 | /* extend permissions */ | |
714 | attr->attr.mode |= base_attr->attr.mode; | |
715 | ||
716 | /* override null show/store with default */ | |
717 | if (!attr->show) | |
718 | attr->show = base_attr->show; | |
719 | if (!attr->store) | |
720 | attr->store = base_attr->store; | |
721 | } | |
722 | ||
723 | return device_create_file(dev, attr); | |
724 | } | |
725 | ||
726 | /** | |
727 | * scsi_sysfs_add_sdev - add scsi device to sysfs | |
728 | * @sdev: scsi_device to add | |
729 | * | |
730 | * Return value: | |
731 | * 0 on Success / non-zero on Failure | |
732 | **/ | |
733 | int scsi_sysfs_add_sdev(struct scsi_device *sdev) | |
734 | { | |
735 | int error, i; | |
736 | ||
737 | if ((error = scsi_device_set_state(sdev, SDEV_RUNNING)) != 0) | |
738 | return error; | |
739 | ||
740 | error = device_add(&sdev->sdev_gendev); | |
741 | if (error) { | |
742 | put_device(sdev->sdev_gendev.parent); | |
743 | printk(KERN_INFO "error 1\n"); | |
744 | return error; | |
745 | } | |
746 | error = class_device_add(&sdev->sdev_classdev); | |
747 | if (error) { | |
748 | printk(KERN_INFO "error 2\n"); | |
749 | goto clean_device; | |
750 | } | |
751 | ||
752 | /* take a reference for the sdev_classdev; this is | |
753 | * released by the sdev_class .release */ | |
754 | get_device(&sdev->sdev_gendev); | |
755 | if (sdev->host->hostt->sdev_attrs) { | |
756 | for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { | |
757 | error = attr_add(&sdev->sdev_gendev, | |
758 | sdev->host->hostt->sdev_attrs[i]); | |
759 | if (error) { | |
903f4fed | 760 | __scsi_remove_device(sdev); |
1da177e4 LT |
761 | goto out; |
762 | } | |
763 | } | |
764 | } | |
765 | ||
766 | for (i = 0; scsi_sysfs_sdev_attrs[i]; i++) { | |
767 | if (!attr_overridden(sdev->host->hostt->sdev_attrs, | |
768 | scsi_sysfs_sdev_attrs[i])) { | |
769 | struct device_attribute * attr = | |
770 | attr_changed_internally(sdev->host, | |
771 | scsi_sysfs_sdev_attrs[i]); | |
772 | error = device_create_file(&sdev->sdev_gendev, attr); | |
773 | if (error) { | |
903f4fed | 774 | __scsi_remove_device(sdev); |
1da177e4 LT |
775 | goto out; |
776 | } | |
777 | } | |
778 | } | |
779 | ||
780 | transport_add_device(&sdev->sdev_gendev); | |
781 | out: | |
782 | return error; | |
783 | ||
784 | clean_device: | |
785 | scsi_device_set_state(sdev, SDEV_CANCEL); | |
786 | ||
787 | device_del(&sdev->sdev_gendev); | |
788 | transport_destroy_device(&sdev->sdev_gendev); | |
789 | put_device(&sdev->sdev_gendev); | |
790 | ||
791 | return error; | |
792 | } | |
793 | ||
903f4fed | 794 | void __scsi_remove_device(struct scsi_device *sdev) |
1da177e4 | 795 | { |
df133c21 JB |
796 | struct device *dev = &sdev->sdev_gendev; |
797 | ||
1da177e4 | 798 | if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0) |
903f4fed | 799 | return; |
1da177e4 LT |
800 | |
801 | class_device_unregister(&sdev->sdev_classdev); | |
df133c21 JB |
802 | transport_remove_device(dev); |
803 | device_del(dev); | |
1da177e4 LT |
804 | scsi_device_set_state(sdev, SDEV_DEL); |
805 | if (sdev->host->hostt->slave_destroy) | |
806 | sdev->host->hostt->slave_destroy(sdev); | |
df133c21 JB |
807 | transport_destroy_device(dev); |
808 | put_device(dev); | |
903f4fed AS |
809 | } |
810 | ||
811 | /** | |
812 | * scsi_remove_device - unregister a device from the scsi bus | |
813 | * @sdev: scsi_device to unregister | |
814 | **/ | |
815 | void scsi_remove_device(struct scsi_device *sdev) | |
816 | { | |
54195002 AS |
817 | struct Scsi_Host *shost = sdev->host; |
818 | ||
0b950672 | 819 | mutex_lock(&shost->scan_mutex); |
903f4fed | 820 | __scsi_remove_device(sdev); |
0b950672 | 821 | mutex_unlock(&shost->scan_mutex); |
1da177e4 LT |
822 | } |
823 | EXPORT_SYMBOL(scsi_remove_device); | |
824 | ||
825 | void __scsi_remove_target(struct scsi_target *starget) | |
826 | { | |
827 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
828 | unsigned long flags; | |
a64358db | 829 | struct scsi_device *sdev; |
1da177e4 LT |
830 | |
831 | spin_lock_irqsave(shost->host_lock, flags); | |
832 | starget->reap_ref++; | |
a64358db AS |
833 | restart: |
834 | list_for_each_entry(sdev, &shost->__devices, siblings) { | |
1da177e4 | 835 | if (sdev->channel != starget->channel || |
a64358db AS |
836 | sdev->id != starget->id || |
837 | sdev->sdev_state == SDEV_DEL) | |
1da177e4 LT |
838 | continue; |
839 | spin_unlock_irqrestore(shost->host_lock, flags); | |
840 | scsi_remove_device(sdev); | |
841 | spin_lock_irqsave(shost->host_lock, flags); | |
a64358db | 842 | goto restart; |
1da177e4 LT |
843 | } |
844 | spin_unlock_irqrestore(shost->host_lock, flags); | |
845 | scsi_target_reap(starget); | |
846 | } | |
847 | ||
20b1e674 | 848 | static int __remove_child (struct device * dev, void * data) |
849 | { | |
850 | if (scsi_is_target_device(dev)) | |
851 | __scsi_remove_target(to_scsi_target(dev)); | |
852 | return 0; | |
853 | } | |
854 | ||
1da177e4 LT |
855 | /** |
856 | * scsi_remove_target - try to remove a target and all its devices | |
857 | * @dev: generic starget or parent of generic stargets to be removed | |
858 | * | |
859 | * Note: This is slightly racy. It is possible that if the user | |
860 | * requests the addition of another device then the target won't be | |
861 | * removed. | |
862 | */ | |
863 | void scsi_remove_target(struct device *dev) | |
864 | { | |
20b1e674 | 865 | struct device *rdev; |
1da177e4 LT |
866 | |
867 | if (scsi_is_target_device(dev)) { | |
868 | __scsi_remove_target(to_scsi_target(dev)); | |
869 | return; | |
870 | } | |
871 | ||
872 | rdev = get_device(dev); | |
20b1e674 | 873 | device_for_each_child(dev, NULL, __remove_child); |
1da177e4 LT |
874 | put_device(rdev); |
875 | } | |
876 | EXPORT_SYMBOL(scsi_remove_target); | |
877 | ||
878 | int scsi_register_driver(struct device_driver *drv) | |
879 | { | |
880 | drv->bus = &scsi_bus_type; | |
881 | ||
882 | return driver_register(drv); | |
883 | } | |
884 | EXPORT_SYMBOL(scsi_register_driver); | |
885 | ||
886 | int scsi_register_interface(struct class_interface *intf) | |
887 | { | |
888 | intf->class = &sdev_class; | |
889 | ||
890 | return class_interface_register(intf); | |
891 | } | |
892 | EXPORT_SYMBOL(scsi_register_interface); | |
893 | ||
894 | ||
895 | static struct class_device_attribute *class_attr_overridden( | |
896 | struct class_device_attribute **attrs, | |
897 | struct class_device_attribute *attr) | |
898 | { | |
899 | int i; | |
900 | ||
901 | if (!attrs) | |
902 | return NULL; | |
903 | for (i = 0; attrs[i]; i++) | |
904 | if (!strcmp(attrs[i]->attr.name, attr->attr.name)) | |
905 | return attrs[i]; | |
906 | return NULL; | |
907 | } | |
908 | ||
909 | static int class_attr_add(struct class_device *classdev, | |
910 | struct class_device_attribute *attr) | |
911 | { | |
912 | struct class_device_attribute *base_attr; | |
913 | ||
914 | /* | |
915 | * Spare the caller from having to copy things it's not interested in. | |
916 | */ | |
917 | base_attr = class_attr_overridden(scsi_sysfs_shost_attrs, attr); | |
918 | if (base_attr) { | |
919 | /* extend permissions */ | |
920 | attr->attr.mode |= base_attr->attr.mode; | |
921 | ||
922 | /* override null show/store with default */ | |
923 | if (!attr->show) | |
924 | attr->show = base_attr->show; | |
925 | if (!attr->store) | |
926 | attr->store = base_attr->store; | |
927 | } | |
928 | ||
929 | return class_device_create_file(classdev, attr); | |
930 | } | |
931 | ||
932 | /** | |
933 | * scsi_sysfs_add_host - add scsi host to subsystem | |
934 | * @shost: scsi host struct to add to subsystem | |
935 | * @dev: parent struct device pointer | |
936 | **/ | |
937 | int scsi_sysfs_add_host(struct Scsi_Host *shost) | |
938 | { | |
939 | int error, i; | |
940 | ||
941 | if (shost->hostt->shost_attrs) { | |
942 | for (i = 0; shost->hostt->shost_attrs[i]; i++) { | |
943 | error = class_attr_add(&shost->shost_classdev, | |
944 | shost->hostt->shost_attrs[i]); | |
945 | if (error) | |
946 | return error; | |
947 | } | |
948 | } | |
949 | ||
950 | for (i = 0; scsi_sysfs_shost_attrs[i]; i++) { | |
951 | if (!class_attr_overridden(shost->hostt->shost_attrs, | |
952 | scsi_sysfs_shost_attrs[i])) { | |
953 | error = class_device_create_file(&shost->shost_classdev, | |
954 | scsi_sysfs_shost_attrs[i]); | |
955 | if (error) | |
956 | return error; | |
957 | } | |
958 | } | |
959 | ||
960 | transport_register_device(&shost->shost_gendev); | |
961 | return 0; | |
962 | } | |
963 | ||
964 | void scsi_sysfs_device_initialize(struct scsi_device *sdev) | |
965 | { | |
966 | unsigned long flags; | |
967 | struct Scsi_Host *shost = sdev->host; | |
968 | struct scsi_target *starget = sdev->sdev_target; | |
969 | ||
970 | device_initialize(&sdev->sdev_gendev); | |
971 | sdev->sdev_gendev.bus = &scsi_bus_type; | |
972 | sdev->sdev_gendev.release = scsi_device_dev_release; | |
973 | sprintf(sdev->sdev_gendev.bus_id,"%d:%d:%d:%d", | |
974 | sdev->host->host_no, sdev->channel, sdev->id, | |
975 | sdev->lun); | |
976 | ||
977 | class_device_initialize(&sdev->sdev_classdev); | |
978 | sdev->sdev_classdev.dev = &sdev->sdev_gendev; | |
979 | sdev->sdev_classdev.class = &sdev_class; | |
980 | snprintf(sdev->sdev_classdev.class_id, BUS_ID_SIZE, | |
981 | "%d:%d:%d:%d", sdev->host->host_no, | |
982 | sdev->channel, sdev->id, sdev->lun); | |
7c9d6f16 | 983 | sdev->scsi_level = starget->scsi_level; |
1da177e4 LT |
984 | transport_setup_device(&sdev->sdev_gendev); |
985 | spin_lock_irqsave(shost->host_lock, flags); | |
986 | list_add_tail(&sdev->same_target_siblings, &starget->devices); | |
987 | list_add_tail(&sdev->siblings, &shost->__devices); | |
988 | spin_unlock_irqrestore(shost->host_lock, flags); | |
989 | } | |
990 | ||
991 | int scsi_is_sdev_device(const struct device *dev) | |
992 | { | |
993 | return dev->release == scsi_device_dev_release; | |
994 | } | |
995 | EXPORT_SYMBOL(scsi_is_sdev_device); | |
996 | ||
997 | /* A blank transport template that is used in drivers that don't | |
998 | * yet implement Transport Attributes */ | |
999 | struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |