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 | ||
9 | #include <linux/config.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/blkdev.h> | |
13 | #include <linux/device.h> | |
14 | ||
15 | #include <scsi/scsi.h> | |
16 | #include <scsi/scsi_device.h> | |
17 | #include <scsi/scsi_host.h> | |
18 | #include <scsi/scsi_tcq.h> | |
19 | #include <scsi/scsi_transport.h> | |
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 | ||
42 | for (i = 0; i < sizeof(sdev_states)/sizeof(sdev_states[0]); i++) { | |
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 | ||
68 | for (i = 0; i < sizeof(shost_states)/sizeof(shost_states[0]); i++) { | |
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 | ||
163 | for (i = 0; i < sizeof(shost_states)/sizeof(shost_states[0]); i++) { | |
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"); | |
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, | |
204 | &class_device_attr_sg_tablesize, | |
205 | &class_device_attr_unchecked_isa_dma, | |
206 | &class_device_attr_proc_name, | |
207 | &class_device_attr_scan, | |
d3301874 | 208 | &class_device_attr_state, |
1da177e4 LT |
209 | NULL |
210 | }; | |
211 | ||
212 | static void scsi_device_cls_release(struct class_device *class_dev) | |
213 | { | |
214 | struct scsi_device *sdev; | |
215 | ||
216 | sdev = class_to_sdev(class_dev); | |
217 | put_device(&sdev->sdev_gendev); | |
218 | } | |
219 | ||
65110b21 | 220 | static void scsi_device_dev_release_usercontext(void *data) |
1da177e4 | 221 | { |
65110b21 | 222 | struct device *dev = data; |
1da177e4 LT |
223 | struct scsi_device *sdev; |
224 | struct device *parent; | |
225 | struct scsi_target *starget; | |
226 | unsigned long flags; | |
227 | ||
228 | parent = dev->parent; | |
229 | sdev = to_scsi_device(dev); | |
230 | starget = to_scsi_target(parent); | |
231 | ||
232 | spin_lock_irqsave(sdev->host->host_lock, flags); | |
233 | starget->reap_ref++; | |
234 | list_del(&sdev->siblings); | |
235 | list_del(&sdev->same_target_siblings); | |
236 | list_del(&sdev->starved_entry); | |
237 | spin_unlock_irqrestore(sdev->host->host_lock, flags); | |
238 | ||
239 | if (sdev->request_queue) { | |
240 | sdev->request_queue->queuedata = NULL; | |
65110b21 | 241 | /* user context needed to free queue */ |
1da177e4 | 242 | scsi_free_queue(sdev->request_queue); |
c2a9331c | 243 | /* temporary expedient, try to catch use of queue lock |
244 | * after free of sdev */ | |
245 | sdev->request_queue = NULL; | |
1da177e4 LT |
246 | } |
247 | ||
248 | scsi_target_reap(scsi_target(sdev)); | |
249 | ||
250 | kfree(sdev->inquiry); | |
251 | kfree(sdev); | |
252 | ||
253 | if (parent) | |
254 | put_device(parent); | |
255 | } | |
256 | ||
65110b21 JB |
257 | static void scsi_device_dev_release(struct device *dev) |
258 | { | |
ffedb452 JB |
259 | struct scsi_device *sdp = to_scsi_device(dev); |
260 | execute_in_process_context(scsi_device_dev_release_usercontext, dev, | |
261 | &sdp->ew); | |
65110b21 JB |
262 | } |
263 | ||
52c1da39 | 264 | static struct class sdev_class = { |
1da177e4 LT |
265 | .name = "scsi_device", |
266 | .release = scsi_device_cls_release, | |
267 | }; | |
268 | ||
269 | /* all probing is done in the individual ->probe routines */ | |
270 | static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) | |
271 | { | |
272 | struct scsi_device *sdp = to_scsi_device(dev); | |
273 | if (sdp->no_uld_attach) | |
274 | return 0; | |
275 | return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; | |
276 | } | |
277 | ||
9b847548 JA |
278 | static int scsi_bus_suspend(struct device * dev, pm_message_t state) |
279 | { | |
280 | struct scsi_device *sdev = to_scsi_device(dev); | |
281 | struct scsi_host_template *sht = sdev->host->hostt; | |
282 | int err; | |
283 | ||
284 | err = scsi_device_quiesce(sdev); | |
285 | if (err) | |
286 | return err; | |
287 | ||
288 | if (sht->suspend) | |
082776e4 | 289 | err = sht->suspend(sdev, state); |
9b847548 JA |
290 | |
291 | return err; | |
292 | } | |
293 | ||
294 | static int scsi_bus_resume(struct device * dev) | |
295 | { | |
296 | struct scsi_device *sdev = to_scsi_device(dev); | |
297 | struct scsi_host_template *sht = sdev->host->hostt; | |
298 | int err = 0; | |
299 | ||
300 | if (sht->resume) | |
301 | err = sht->resume(sdev); | |
302 | ||
303 | scsi_device_resume(sdev); | |
304 | return err; | |
305 | } | |
306 | ||
1da177e4 LT |
307 | struct bus_type scsi_bus_type = { |
308 | .name = "scsi", | |
309 | .match = scsi_bus_match, | |
9b847548 JA |
310 | .suspend = scsi_bus_suspend, |
311 | .resume = scsi_bus_resume, | |
1da177e4 LT |
312 | }; |
313 | ||
314 | int scsi_sysfs_register(void) | |
315 | { | |
316 | int error; | |
317 | ||
318 | error = bus_register(&scsi_bus_type); | |
319 | if (!error) { | |
320 | error = class_register(&sdev_class); | |
321 | if (error) | |
322 | bus_unregister(&scsi_bus_type); | |
323 | } | |
324 | ||
325 | return error; | |
326 | } | |
327 | ||
328 | void scsi_sysfs_unregister(void) | |
329 | { | |
330 | class_unregister(&sdev_class); | |
331 | bus_unregister(&scsi_bus_type); | |
332 | } | |
333 | ||
334 | /* | |
335 | * sdev_show_function: macro to create an attr function that can be used to | |
336 | * show a non-bit field. | |
337 | */ | |
338 | #define sdev_show_function(field, format_string) \ | |
339 | static ssize_t \ | |
10523b3b | 340 | sdev_show_##field (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
341 | { \ |
342 | struct scsi_device *sdev; \ | |
343 | sdev = to_scsi_device(dev); \ | |
344 | return snprintf (buf, 20, format_string, sdev->field); \ | |
345 | } \ | |
346 | ||
347 | /* | |
348 | * sdev_rd_attr: macro to create a function and attribute variable for a | |
349 | * read only field. | |
350 | */ | |
351 | #define sdev_rd_attr(field, format_string) \ | |
352 | sdev_show_function(field, format_string) \ | |
353 | static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); | |
354 | ||
355 | ||
356 | /* | |
357 | * sdev_rd_attr: create a function and attribute variable for a | |
358 | * read/write field. | |
359 | */ | |
360 | #define sdev_rw_attr(field, format_string) \ | |
361 | sdev_show_function(field, format_string) \ | |
362 | \ | |
363 | static ssize_t \ | |
10523b3b | 364 | sdev_store_##field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \ |
1da177e4 LT |
365 | { \ |
366 | struct scsi_device *sdev; \ | |
367 | sdev = to_scsi_device(dev); \ | |
368 | snscanf (buf, 20, format_string, &sdev->field); \ | |
369 | return count; \ | |
370 | } \ | |
371 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
372 | ||
373 | /* Currently we don't export bit fields, but we might in future, | |
374 | * so leave this code in */ | |
375 | #if 0 | |
376 | /* | |
377 | * sdev_rd_attr: create a function and attribute variable for a | |
378 | * read/write bit field. | |
379 | */ | |
380 | #define sdev_rw_attr_bit(field) \ | |
381 | sdev_show_function(field, "%d\n") \ | |
382 | \ | |
383 | static ssize_t \ | |
10523b3b | 384 | sdev_store_##field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \ |
1da177e4 LT |
385 | { \ |
386 | int ret; \ | |
387 | struct scsi_device *sdev; \ | |
388 | ret = scsi_sdev_check_buf_bit(buf); \ | |
389 | if (ret >= 0) { \ | |
390 | sdev = to_scsi_device(dev); \ | |
391 | sdev->field = ret; \ | |
392 | ret = count; \ | |
393 | } \ | |
394 | return ret; \ | |
395 | } \ | |
396 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
397 | ||
398 | /* | |
399 | * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", | |
400 | * else return -EINVAL. | |
401 | */ | |
402 | static int scsi_sdev_check_buf_bit(const char *buf) | |
403 | { | |
404 | if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { | |
405 | if (buf[0] == '1') | |
406 | return 1; | |
407 | else if (buf[0] == '0') | |
408 | return 0; | |
409 | else | |
410 | return -EINVAL; | |
411 | } else | |
412 | return -EINVAL; | |
413 | } | |
414 | #endif | |
415 | /* | |
416 | * Create the actual show/store functions and data structures. | |
417 | */ | |
418 | sdev_rd_attr (device_blocked, "%d\n"); | |
419 | sdev_rd_attr (queue_depth, "%d\n"); | |
420 | sdev_rd_attr (type, "%d\n"); | |
421 | sdev_rd_attr (scsi_level, "%d\n"); | |
422 | sdev_rd_attr (vendor, "%.8s\n"); | |
423 | sdev_rd_attr (model, "%.16s\n"); | |
424 | sdev_rd_attr (rev, "%.4s\n"); | |
425 | ||
426 | static ssize_t | |
10523b3b | 427 | sdev_show_timeout (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, "%d\n", sdev->timeout / HZ); | |
432 | } | |
433 | ||
434 | static ssize_t | |
10523b3b | 435 | sdev_store_timeout (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
436 | { |
437 | struct scsi_device *sdev; | |
438 | int timeout; | |
439 | sdev = to_scsi_device(dev); | |
440 | sscanf (buf, "%d\n", &timeout); | |
441 | sdev->timeout = timeout * HZ; | |
442 | return count; | |
443 | } | |
444 | static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); | |
445 | ||
446 | static ssize_t | |
10523b3b | 447 | store_rescan_field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
448 | { |
449 | scsi_rescan_device(dev); | |
450 | return count; | |
451 | } | |
452 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); | |
453 | ||
10523b3b | 454 | static ssize_t sdev_store_delete(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
455 | size_t count) |
456 | { | |
457 | scsi_remove_device(to_scsi_device(dev)); | |
458 | return count; | |
459 | }; | |
460 | static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); | |
461 | ||
462 | static ssize_t | |
10523b3b | 463 | store_state_field(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
464 | { |
465 | int i; | |
466 | struct scsi_device *sdev = to_scsi_device(dev); | |
467 | enum scsi_device_state state = 0; | |
468 | ||
469 | for (i = 0; i < sizeof(sdev_states)/sizeof(sdev_states[0]); i++) { | |
470 | const int len = strlen(sdev_states[i].name); | |
471 | if (strncmp(sdev_states[i].name, buf, len) == 0 && | |
472 | buf[len] == '\n') { | |
473 | state = sdev_states[i].value; | |
474 | break; | |
475 | } | |
476 | } | |
477 | if (!state) | |
478 | return -EINVAL; | |
479 | ||
480 | if (scsi_device_set_state(sdev, state)) | |
481 | return -EINVAL; | |
482 | return count; | |
483 | } | |
484 | ||
485 | static ssize_t | |
10523b3b | 486 | show_state_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
487 | { |
488 | struct scsi_device *sdev = to_scsi_device(dev); | |
489 | const char *name = scsi_device_state_name(sdev->sdev_state); | |
490 | ||
491 | if (!name) | |
492 | return -EINVAL; | |
493 | ||
494 | return snprintf(buf, 20, "%s\n", name); | |
495 | } | |
496 | ||
497 | static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); | |
498 | ||
499 | static ssize_t | |
10523b3b | 500 | show_queue_type_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
501 | { |
502 | struct scsi_device *sdev = to_scsi_device(dev); | |
503 | const char *name = "none"; | |
504 | ||
505 | if (sdev->ordered_tags) | |
506 | name = "ordered"; | |
507 | else if (sdev->simple_tags) | |
508 | name = "simple"; | |
509 | ||
510 | return snprintf(buf, 20, "%s\n", name); | |
511 | } | |
512 | ||
513 | static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL); | |
514 | ||
515 | static ssize_t | |
10523b3b | 516 | show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
517 | { |
518 | return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); | |
519 | } | |
520 | ||
521 | static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); | |
522 | ||
523 | #define show_sdev_iostat(field) \ | |
524 | static ssize_t \ | |
10523b3b | 525 | show_iostat_##field(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
526 | { \ |
527 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
528 | unsigned long long count = atomic_read(&sdev->field); \ | |
529 | return snprintf(buf, 20, "0x%llx\n", count); \ | |
530 | } \ | |
531 | static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) | |
532 | ||
533 | show_sdev_iostat(iorequest_cnt); | |
534 | show_sdev_iostat(iodone_cnt); | |
535 | show_sdev_iostat(ioerr_cnt); | |
536 | ||
537 | ||
538 | /* Default template for device attributes. May NOT be modified */ | |
539 | static struct device_attribute *scsi_sysfs_sdev_attrs[] = { | |
540 | &dev_attr_device_blocked, | |
541 | &dev_attr_queue_depth, | |
542 | &dev_attr_queue_type, | |
543 | &dev_attr_type, | |
544 | &dev_attr_scsi_level, | |
545 | &dev_attr_vendor, | |
546 | &dev_attr_model, | |
547 | &dev_attr_rev, | |
548 | &dev_attr_rescan, | |
549 | &dev_attr_delete, | |
550 | &dev_attr_state, | |
551 | &dev_attr_timeout, | |
552 | &dev_attr_iocounterbits, | |
553 | &dev_attr_iorequest_cnt, | |
554 | &dev_attr_iodone_cnt, | |
555 | &dev_attr_ioerr_cnt, | |
556 | NULL | |
557 | }; | |
558 | ||
10523b3b | 559 | static ssize_t sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
560 | size_t count) |
561 | { | |
562 | int depth, retval; | |
563 | struct scsi_device *sdev = to_scsi_device(dev); | |
564 | struct scsi_host_template *sht = sdev->host->hostt; | |
565 | ||
566 | if (!sht->change_queue_depth) | |
567 | return -EINVAL; | |
568 | ||
569 | depth = simple_strtoul(buf, NULL, 0); | |
570 | ||
571 | if (depth < 1) | |
572 | return -EINVAL; | |
573 | ||
574 | retval = sht->change_queue_depth(sdev, depth); | |
575 | if (retval < 0) | |
576 | return retval; | |
577 | ||
578 | return count; | |
579 | } | |
580 | ||
581 | static struct device_attribute sdev_attr_queue_depth_rw = | |
582 | __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, | |
583 | sdev_store_queue_depth_rw); | |
584 | ||
10523b3b | 585 | static ssize_t sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
586 | size_t count) |
587 | { | |
588 | struct scsi_device *sdev = to_scsi_device(dev); | |
589 | struct scsi_host_template *sht = sdev->host->hostt; | |
590 | int tag_type = 0, retval; | |
591 | int prev_tag_type = scsi_get_tag_type(sdev); | |
592 | ||
593 | if (!sdev->tagged_supported || !sht->change_queue_type) | |
594 | return -EINVAL; | |
595 | ||
596 | if (strncmp(buf, "ordered", 7) == 0) | |
597 | tag_type = MSG_ORDERED_TAG; | |
598 | else if (strncmp(buf, "simple", 6) == 0) | |
599 | tag_type = MSG_SIMPLE_TAG; | |
600 | else if (strncmp(buf, "none", 4) != 0) | |
601 | return -EINVAL; | |
602 | ||
603 | if (tag_type == prev_tag_type) | |
604 | return count; | |
605 | ||
606 | retval = sht->change_queue_type(sdev, tag_type); | |
607 | if (retval < 0) | |
608 | return retval; | |
609 | ||
610 | return count; | |
611 | } | |
612 | ||
613 | static struct device_attribute sdev_attr_queue_type_rw = | |
614 | __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, | |
615 | sdev_store_queue_type_rw); | |
616 | ||
617 | static struct device_attribute *attr_changed_internally( | |
618 | struct Scsi_Host *shost, | |
619 | struct device_attribute * attr) | |
620 | { | |
621 | if (!strcmp("queue_depth", attr->attr.name) | |
622 | && shost->hostt->change_queue_depth) | |
623 | return &sdev_attr_queue_depth_rw; | |
624 | else if (!strcmp("queue_type", attr->attr.name) | |
625 | && shost->hostt->change_queue_type) | |
626 | return &sdev_attr_queue_type_rw; | |
627 | return attr; | |
628 | } | |
629 | ||
630 | ||
631 | static struct device_attribute *attr_overridden( | |
632 | struct device_attribute **attrs, | |
633 | struct device_attribute *attr) | |
634 | { | |
635 | int i; | |
636 | ||
637 | if (!attrs) | |
638 | return NULL; | |
639 | for (i = 0; attrs[i]; i++) | |
640 | if (!strcmp(attrs[i]->attr.name, attr->attr.name)) | |
641 | return attrs[i]; | |
642 | return NULL; | |
643 | } | |
644 | ||
645 | static int attr_add(struct device *dev, struct device_attribute *attr) | |
646 | { | |
647 | struct device_attribute *base_attr; | |
648 | ||
649 | /* | |
650 | * Spare the caller from having to copy things it's not interested in. | |
651 | */ | |
652 | base_attr = attr_overridden(scsi_sysfs_sdev_attrs, attr); | |
653 | if (base_attr) { | |
654 | /* extend permissions */ | |
655 | attr->attr.mode |= base_attr->attr.mode; | |
656 | ||
657 | /* override null show/store with default */ | |
658 | if (!attr->show) | |
659 | attr->show = base_attr->show; | |
660 | if (!attr->store) | |
661 | attr->store = base_attr->store; | |
662 | } | |
663 | ||
664 | return device_create_file(dev, attr); | |
665 | } | |
666 | ||
667 | /** | |
668 | * scsi_sysfs_add_sdev - add scsi device to sysfs | |
669 | * @sdev: scsi_device to add | |
670 | * | |
671 | * Return value: | |
672 | * 0 on Success / non-zero on Failure | |
673 | **/ | |
674 | int scsi_sysfs_add_sdev(struct scsi_device *sdev) | |
675 | { | |
676 | int error, i; | |
677 | ||
678 | if ((error = scsi_device_set_state(sdev, SDEV_RUNNING)) != 0) | |
679 | return error; | |
680 | ||
681 | error = device_add(&sdev->sdev_gendev); | |
682 | if (error) { | |
683 | put_device(sdev->sdev_gendev.parent); | |
684 | printk(KERN_INFO "error 1\n"); | |
685 | return error; | |
686 | } | |
687 | error = class_device_add(&sdev->sdev_classdev); | |
688 | if (error) { | |
689 | printk(KERN_INFO "error 2\n"); | |
690 | goto clean_device; | |
691 | } | |
692 | ||
693 | /* take a reference for the sdev_classdev; this is | |
694 | * released by the sdev_class .release */ | |
695 | get_device(&sdev->sdev_gendev); | |
696 | if (sdev->host->hostt->sdev_attrs) { | |
697 | for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { | |
698 | error = attr_add(&sdev->sdev_gendev, | |
699 | sdev->host->hostt->sdev_attrs[i]); | |
700 | if (error) { | |
903f4fed | 701 | __scsi_remove_device(sdev); |
1da177e4 LT |
702 | goto out; |
703 | } | |
704 | } | |
705 | } | |
706 | ||
707 | for (i = 0; scsi_sysfs_sdev_attrs[i]; i++) { | |
708 | if (!attr_overridden(sdev->host->hostt->sdev_attrs, | |
709 | scsi_sysfs_sdev_attrs[i])) { | |
710 | struct device_attribute * attr = | |
711 | attr_changed_internally(sdev->host, | |
712 | scsi_sysfs_sdev_attrs[i]); | |
713 | error = device_create_file(&sdev->sdev_gendev, attr); | |
714 | if (error) { | |
903f4fed | 715 | __scsi_remove_device(sdev); |
1da177e4 LT |
716 | goto out; |
717 | } | |
718 | } | |
719 | } | |
720 | ||
721 | transport_add_device(&sdev->sdev_gendev); | |
722 | out: | |
723 | return error; | |
724 | ||
725 | clean_device: | |
726 | scsi_device_set_state(sdev, SDEV_CANCEL); | |
727 | ||
728 | device_del(&sdev->sdev_gendev); | |
729 | transport_destroy_device(&sdev->sdev_gendev); | |
730 | put_device(&sdev->sdev_gendev); | |
731 | ||
732 | return error; | |
733 | } | |
734 | ||
903f4fed | 735 | void __scsi_remove_device(struct scsi_device *sdev) |
1da177e4 | 736 | { |
df133c21 JB |
737 | struct device *dev = &sdev->sdev_gendev; |
738 | ||
1da177e4 | 739 | if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0) |
903f4fed | 740 | return; |
1da177e4 LT |
741 | |
742 | class_device_unregister(&sdev->sdev_classdev); | |
df133c21 JB |
743 | transport_remove_device(dev); |
744 | device_del(dev); | |
1da177e4 LT |
745 | scsi_device_set_state(sdev, SDEV_DEL); |
746 | if (sdev->host->hostt->slave_destroy) | |
747 | sdev->host->hostt->slave_destroy(sdev); | |
df133c21 JB |
748 | transport_destroy_device(dev); |
749 | put_device(dev); | |
903f4fed AS |
750 | } |
751 | ||
752 | /** | |
753 | * scsi_remove_device - unregister a device from the scsi bus | |
754 | * @sdev: scsi_device to unregister | |
755 | **/ | |
756 | void scsi_remove_device(struct scsi_device *sdev) | |
757 | { | |
54195002 AS |
758 | struct Scsi_Host *shost = sdev->host; |
759 | ||
0b950672 | 760 | mutex_lock(&shost->scan_mutex); |
903f4fed | 761 | __scsi_remove_device(sdev); |
0b950672 | 762 | mutex_unlock(&shost->scan_mutex); |
1da177e4 LT |
763 | } |
764 | EXPORT_SYMBOL(scsi_remove_device); | |
765 | ||
766 | void __scsi_remove_target(struct scsi_target *starget) | |
767 | { | |
768 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
769 | unsigned long flags; | |
a64358db | 770 | struct scsi_device *sdev; |
1da177e4 LT |
771 | |
772 | spin_lock_irqsave(shost->host_lock, flags); | |
773 | starget->reap_ref++; | |
a64358db AS |
774 | restart: |
775 | list_for_each_entry(sdev, &shost->__devices, siblings) { | |
1da177e4 | 776 | if (sdev->channel != starget->channel || |
a64358db AS |
777 | sdev->id != starget->id || |
778 | sdev->sdev_state == SDEV_DEL) | |
1da177e4 LT |
779 | continue; |
780 | spin_unlock_irqrestore(shost->host_lock, flags); | |
781 | scsi_remove_device(sdev); | |
782 | spin_lock_irqsave(shost->host_lock, flags); | |
a64358db | 783 | goto restart; |
1da177e4 LT |
784 | } |
785 | spin_unlock_irqrestore(shost->host_lock, flags); | |
786 | scsi_target_reap(starget); | |
787 | } | |
788 | ||
20b1e674 | 789 | static int __remove_child (struct device * dev, void * data) |
790 | { | |
791 | if (scsi_is_target_device(dev)) | |
792 | __scsi_remove_target(to_scsi_target(dev)); | |
793 | return 0; | |
794 | } | |
795 | ||
1da177e4 LT |
796 | /** |
797 | * scsi_remove_target - try to remove a target and all its devices | |
798 | * @dev: generic starget or parent of generic stargets to be removed | |
799 | * | |
800 | * Note: This is slightly racy. It is possible that if the user | |
801 | * requests the addition of another device then the target won't be | |
802 | * removed. | |
803 | */ | |
804 | void scsi_remove_target(struct device *dev) | |
805 | { | |
20b1e674 | 806 | struct device *rdev; |
1da177e4 LT |
807 | |
808 | if (scsi_is_target_device(dev)) { | |
809 | __scsi_remove_target(to_scsi_target(dev)); | |
810 | return; | |
811 | } | |
812 | ||
813 | rdev = get_device(dev); | |
20b1e674 | 814 | device_for_each_child(dev, NULL, __remove_child); |
1da177e4 LT |
815 | put_device(rdev); |
816 | } | |
817 | EXPORT_SYMBOL(scsi_remove_target); | |
818 | ||
819 | int scsi_register_driver(struct device_driver *drv) | |
820 | { | |
821 | drv->bus = &scsi_bus_type; | |
822 | ||
823 | return driver_register(drv); | |
824 | } | |
825 | EXPORT_SYMBOL(scsi_register_driver); | |
826 | ||
827 | int scsi_register_interface(struct class_interface *intf) | |
828 | { | |
829 | intf->class = &sdev_class; | |
830 | ||
831 | return class_interface_register(intf); | |
832 | } | |
833 | EXPORT_SYMBOL(scsi_register_interface); | |
834 | ||
835 | ||
836 | static struct class_device_attribute *class_attr_overridden( | |
837 | struct class_device_attribute **attrs, | |
838 | struct class_device_attribute *attr) | |
839 | { | |
840 | int i; | |
841 | ||
842 | if (!attrs) | |
843 | return NULL; | |
844 | for (i = 0; attrs[i]; i++) | |
845 | if (!strcmp(attrs[i]->attr.name, attr->attr.name)) | |
846 | return attrs[i]; | |
847 | return NULL; | |
848 | } | |
849 | ||
850 | static int class_attr_add(struct class_device *classdev, | |
851 | struct class_device_attribute *attr) | |
852 | { | |
853 | struct class_device_attribute *base_attr; | |
854 | ||
855 | /* | |
856 | * Spare the caller from having to copy things it's not interested in. | |
857 | */ | |
858 | base_attr = class_attr_overridden(scsi_sysfs_shost_attrs, attr); | |
859 | if (base_attr) { | |
860 | /* extend permissions */ | |
861 | attr->attr.mode |= base_attr->attr.mode; | |
862 | ||
863 | /* override null show/store with default */ | |
864 | if (!attr->show) | |
865 | attr->show = base_attr->show; | |
866 | if (!attr->store) | |
867 | attr->store = base_attr->store; | |
868 | } | |
869 | ||
870 | return class_device_create_file(classdev, attr); | |
871 | } | |
872 | ||
873 | /** | |
874 | * scsi_sysfs_add_host - add scsi host to subsystem | |
875 | * @shost: scsi host struct to add to subsystem | |
876 | * @dev: parent struct device pointer | |
877 | **/ | |
878 | int scsi_sysfs_add_host(struct Scsi_Host *shost) | |
879 | { | |
880 | int error, i; | |
881 | ||
882 | if (shost->hostt->shost_attrs) { | |
883 | for (i = 0; shost->hostt->shost_attrs[i]; i++) { | |
884 | error = class_attr_add(&shost->shost_classdev, | |
885 | shost->hostt->shost_attrs[i]); | |
886 | if (error) | |
887 | return error; | |
888 | } | |
889 | } | |
890 | ||
891 | for (i = 0; scsi_sysfs_shost_attrs[i]; i++) { | |
892 | if (!class_attr_overridden(shost->hostt->shost_attrs, | |
893 | scsi_sysfs_shost_attrs[i])) { | |
894 | error = class_device_create_file(&shost->shost_classdev, | |
895 | scsi_sysfs_shost_attrs[i]); | |
896 | if (error) | |
897 | return error; | |
898 | } | |
899 | } | |
900 | ||
901 | transport_register_device(&shost->shost_gendev); | |
902 | return 0; | |
903 | } | |
904 | ||
905 | void scsi_sysfs_device_initialize(struct scsi_device *sdev) | |
906 | { | |
907 | unsigned long flags; | |
908 | struct Scsi_Host *shost = sdev->host; | |
909 | struct scsi_target *starget = sdev->sdev_target; | |
910 | ||
911 | device_initialize(&sdev->sdev_gendev); | |
912 | sdev->sdev_gendev.bus = &scsi_bus_type; | |
913 | sdev->sdev_gendev.release = scsi_device_dev_release; | |
914 | sprintf(sdev->sdev_gendev.bus_id,"%d:%d:%d:%d", | |
915 | sdev->host->host_no, sdev->channel, sdev->id, | |
916 | sdev->lun); | |
917 | ||
918 | class_device_initialize(&sdev->sdev_classdev); | |
919 | sdev->sdev_classdev.dev = &sdev->sdev_gendev; | |
920 | sdev->sdev_classdev.class = &sdev_class; | |
921 | snprintf(sdev->sdev_classdev.class_id, BUS_ID_SIZE, | |
922 | "%d:%d:%d:%d", sdev->host->host_no, | |
923 | sdev->channel, sdev->id, sdev->lun); | |
924 | sdev->scsi_level = SCSI_2; | |
925 | transport_setup_device(&sdev->sdev_gendev); | |
926 | spin_lock_irqsave(shost->host_lock, flags); | |
927 | list_add_tail(&sdev->same_target_siblings, &starget->devices); | |
928 | list_add_tail(&sdev->siblings, &shost->__devices); | |
929 | spin_unlock_irqrestore(shost->host_lock, flags); | |
930 | } | |
931 | ||
932 | int scsi_is_sdev_device(const struct device *dev) | |
933 | { | |
934 | return dev->release == scsi_device_dev_release; | |
935 | } | |
936 | EXPORT_SYMBOL(scsi_is_sdev_device); | |
937 | ||
938 | /* A blank transport template that is used in drivers that don't | |
939 | * yet implement Transport Attributes */ | |
940 | struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |