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 | ||
24 | static struct { | |
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 | ||
51 | static int check_set(unsigned int *val, char *src) | |
52 | { | |
53 | char *last; | |
54 | ||
55 | if (strncmp(src, "-", 20) == 0) { | |
56 | *val = SCAN_WILD_CARD; | |
57 | } else { | |
58 | /* | |
59 | * Doesn't check for int overflow | |
60 | */ | |
61 | *val = simple_strtoul(src, &last, 0); | |
62 | if (*last != '\0') | |
63 | return 1; | |
64 | } | |
65 | return 0; | |
66 | } | |
67 | ||
68 | static int scsi_scan(struct Scsi_Host *shost, const char *str) | |
69 | { | |
70 | char s1[15], s2[15], s3[15], junk; | |
71 | unsigned int channel, id, lun; | |
72 | int res; | |
73 | ||
74 | res = sscanf(str, "%10s %10s %10s %c", s1, s2, s3, &junk); | |
75 | if (res != 3) | |
76 | return -EINVAL; | |
77 | if (check_set(&channel, s1)) | |
78 | return -EINVAL; | |
79 | if (check_set(&id, s2)) | |
80 | return -EINVAL; | |
81 | if (check_set(&lun, s3)) | |
82 | return -EINVAL; | |
83 | res = scsi_scan_host_selected(shost, channel, id, lun, 1); | |
84 | return res; | |
85 | } | |
86 | ||
87 | /* | |
88 | * shost_show_function: macro to create an attr function that can be used to | |
89 | * show a non-bit field. | |
90 | */ | |
91 | #define shost_show_function(name, field, format_string) \ | |
92 | static ssize_t \ | |
93 | show_##name (struct class_device *class_dev, char *buf) \ | |
94 | { \ | |
95 | struct Scsi_Host *shost = class_to_shost(class_dev); \ | |
96 | return snprintf (buf, 20, format_string, shost->field); \ | |
97 | } | |
98 | ||
99 | /* | |
100 | * shost_rd_attr: macro to create a function and attribute variable for a | |
101 | * read only field. | |
102 | */ | |
103 | #define shost_rd_attr2(name, field, format_string) \ | |
104 | shost_show_function(name, field, format_string) \ | |
105 | static CLASS_DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); | |
106 | ||
107 | #define shost_rd_attr(field, format_string) \ | |
108 | shost_rd_attr2(field, field, format_string) | |
109 | ||
110 | /* | |
111 | * Create the actual show/store functions and data structures. | |
112 | */ | |
113 | ||
114 | static ssize_t store_scan(struct class_device *class_dev, const char *buf, | |
115 | size_t count) | |
116 | { | |
117 | struct Scsi_Host *shost = class_to_shost(class_dev); | |
118 | int res; | |
119 | ||
120 | res = scsi_scan(shost, buf); | |
121 | if (res == 0) | |
122 | res = count; | |
123 | return res; | |
124 | }; | |
125 | static CLASS_DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); | |
126 | ||
127 | shost_rd_attr(unique_id, "%u\n"); | |
128 | shost_rd_attr(host_busy, "%hu\n"); | |
129 | shost_rd_attr(cmd_per_lun, "%hd\n"); | |
130 | shost_rd_attr(sg_tablesize, "%hu\n"); | |
131 | shost_rd_attr(unchecked_isa_dma, "%d\n"); | |
132 | shost_rd_attr2(proc_name, hostt->proc_name, "%s\n"); | |
133 | ||
134 | static struct class_device_attribute *scsi_sysfs_shost_attrs[] = { | |
135 | &class_device_attr_unique_id, | |
136 | &class_device_attr_host_busy, | |
137 | &class_device_attr_cmd_per_lun, | |
138 | &class_device_attr_sg_tablesize, | |
139 | &class_device_attr_unchecked_isa_dma, | |
140 | &class_device_attr_proc_name, | |
141 | &class_device_attr_scan, | |
142 | NULL | |
143 | }; | |
144 | ||
145 | static void scsi_device_cls_release(struct class_device *class_dev) | |
146 | { | |
147 | struct scsi_device *sdev; | |
148 | ||
149 | sdev = class_to_sdev(class_dev); | |
150 | put_device(&sdev->sdev_gendev); | |
151 | } | |
152 | ||
153 | void scsi_device_dev_release(struct device *dev) | |
154 | { | |
155 | struct scsi_device *sdev; | |
156 | struct device *parent; | |
157 | struct scsi_target *starget; | |
158 | unsigned long flags; | |
159 | ||
160 | parent = dev->parent; | |
161 | sdev = to_scsi_device(dev); | |
162 | starget = to_scsi_target(parent); | |
163 | ||
164 | spin_lock_irqsave(sdev->host->host_lock, flags); | |
165 | starget->reap_ref++; | |
166 | list_del(&sdev->siblings); | |
167 | list_del(&sdev->same_target_siblings); | |
168 | list_del(&sdev->starved_entry); | |
169 | spin_unlock_irqrestore(sdev->host->host_lock, flags); | |
170 | ||
171 | if (sdev->request_queue) { | |
172 | sdev->request_queue->queuedata = NULL; | |
173 | scsi_free_queue(sdev->request_queue); | |
174 | } | |
175 | ||
176 | scsi_target_reap(scsi_target(sdev)); | |
177 | ||
178 | kfree(sdev->inquiry); | |
179 | kfree(sdev); | |
180 | ||
181 | if (parent) | |
182 | put_device(parent); | |
183 | } | |
184 | ||
185 | struct class sdev_class = { | |
186 | .name = "scsi_device", | |
187 | .release = scsi_device_cls_release, | |
188 | }; | |
189 | ||
190 | /* all probing is done in the individual ->probe routines */ | |
191 | static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) | |
192 | { | |
193 | struct scsi_device *sdp = to_scsi_device(dev); | |
194 | if (sdp->no_uld_attach) | |
195 | return 0; | |
196 | return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; | |
197 | } | |
198 | ||
199 | struct bus_type scsi_bus_type = { | |
200 | .name = "scsi", | |
201 | .match = scsi_bus_match, | |
202 | }; | |
203 | ||
204 | int scsi_sysfs_register(void) | |
205 | { | |
206 | int error; | |
207 | ||
208 | error = bus_register(&scsi_bus_type); | |
209 | if (!error) { | |
210 | error = class_register(&sdev_class); | |
211 | if (error) | |
212 | bus_unregister(&scsi_bus_type); | |
213 | } | |
214 | ||
215 | return error; | |
216 | } | |
217 | ||
218 | void scsi_sysfs_unregister(void) | |
219 | { | |
220 | class_unregister(&sdev_class); | |
221 | bus_unregister(&scsi_bus_type); | |
222 | } | |
223 | ||
224 | /* | |
225 | * sdev_show_function: macro to create an attr function that can be used to | |
226 | * show a non-bit field. | |
227 | */ | |
228 | #define sdev_show_function(field, format_string) \ | |
229 | static ssize_t \ | |
230 | sdev_show_##field (struct device *dev, char *buf) \ | |
231 | { \ | |
232 | struct scsi_device *sdev; \ | |
233 | sdev = to_scsi_device(dev); \ | |
234 | return snprintf (buf, 20, format_string, sdev->field); \ | |
235 | } \ | |
236 | ||
237 | /* | |
238 | * sdev_rd_attr: macro to create a function and attribute variable for a | |
239 | * read only field. | |
240 | */ | |
241 | #define sdev_rd_attr(field, format_string) \ | |
242 | sdev_show_function(field, format_string) \ | |
243 | static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); | |
244 | ||
245 | ||
246 | /* | |
247 | * sdev_rd_attr: create a function and attribute variable for a | |
248 | * read/write field. | |
249 | */ | |
250 | #define sdev_rw_attr(field, format_string) \ | |
251 | sdev_show_function(field, format_string) \ | |
252 | \ | |
253 | static ssize_t \ | |
254 | sdev_store_##field (struct device *dev, const char *buf, size_t count) \ | |
255 | { \ | |
256 | struct scsi_device *sdev; \ | |
257 | sdev = to_scsi_device(dev); \ | |
258 | snscanf (buf, 20, format_string, &sdev->field); \ | |
259 | return count; \ | |
260 | } \ | |
261 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
262 | ||
263 | /* Currently we don't export bit fields, but we might in future, | |
264 | * so leave this code in */ | |
265 | #if 0 | |
266 | /* | |
267 | * sdev_rd_attr: create a function and attribute variable for a | |
268 | * read/write bit field. | |
269 | */ | |
270 | #define sdev_rw_attr_bit(field) \ | |
271 | sdev_show_function(field, "%d\n") \ | |
272 | \ | |
273 | static ssize_t \ | |
274 | sdev_store_##field (struct device *dev, const char *buf, size_t count) \ | |
275 | { \ | |
276 | int ret; \ | |
277 | struct scsi_device *sdev; \ | |
278 | ret = scsi_sdev_check_buf_bit(buf); \ | |
279 | if (ret >= 0) { \ | |
280 | sdev = to_scsi_device(dev); \ | |
281 | sdev->field = ret; \ | |
282 | ret = count; \ | |
283 | } \ | |
284 | return ret; \ | |
285 | } \ | |
286 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
287 | ||
288 | /* | |
289 | * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", | |
290 | * else return -EINVAL. | |
291 | */ | |
292 | static int scsi_sdev_check_buf_bit(const char *buf) | |
293 | { | |
294 | if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { | |
295 | if (buf[0] == '1') | |
296 | return 1; | |
297 | else if (buf[0] == '0') | |
298 | return 0; | |
299 | else | |
300 | return -EINVAL; | |
301 | } else | |
302 | return -EINVAL; | |
303 | } | |
304 | #endif | |
305 | /* | |
306 | * Create the actual show/store functions and data structures. | |
307 | */ | |
308 | sdev_rd_attr (device_blocked, "%d\n"); | |
309 | sdev_rd_attr (queue_depth, "%d\n"); | |
310 | sdev_rd_attr (type, "%d\n"); | |
311 | sdev_rd_attr (scsi_level, "%d\n"); | |
312 | sdev_rd_attr (vendor, "%.8s\n"); | |
313 | sdev_rd_attr (model, "%.16s\n"); | |
314 | sdev_rd_attr (rev, "%.4s\n"); | |
315 | ||
316 | static ssize_t | |
317 | sdev_show_timeout (struct device *dev, char *buf) | |
318 | { | |
319 | struct scsi_device *sdev; | |
320 | sdev = to_scsi_device(dev); | |
321 | return snprintf (buf, 20, "%d\n", sdev->timeout / HZ); | |
322 | } | |
323 | ||
324 | static ssize_t | |
325 | sdev_store_timeout (struct device *dev, const char *buf, size_t count) | |
326 | { | |
327 | struct scsi_device *sdev; | |
328 | int timeout; | |
329 | sdev = to_scsi_device(dev); | |
330 | sscanf (buf, "%d\n", &timeout); | |
331 | sdev->timeout = timeout * HZ; | |
332 | return count; | |
333 | } | |
334 | static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); | |
335 | ||
336 | static ssize_t | |
337 | store_rescan_field (struct device *dev, const char *buf, size_t count) | |
338 | { | |
339 | scsi_rescan_device(dev); | |
340 | return count; | |
341 | } | |
342 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); | |
343 | ||
344 | static ssize_t sdev_store_delete(struct device *dev, const char *buf, | |
345 | size_t count) | |
346 | { | |
347 | scsi_remove_device(to_scsi_device(dev)); | |
348 | return count; | |
349 | }; | |
350 | static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); | |
351 | ||
352 | static ssize_t | |
353 | store_state_field(struct device *dev, const char *buf, size_t count) | |
354 | { | |
355 | int i; | |
356 | struct scsi_device *sdev = to_scsi_device(dev); | |
357 | enum scsi_device_state state = 0; | |
358 | ||
359 | for (i = 0; i < sizeof(sdev_states)/sizeof(sdev_states[0]); i++) { | |
360 | const int len = strlen(sdev_states[i].name); | |
361 | if (strncmp(sdev_states[i].name, buf, len) == 0 && | |
362 | buf[len] == '\n') { | |
363 | state = sdev_states[i].value; | |
364 | break; | |
365 | } | |
366 | } | |
367 | if (!state) | |
368 | return -EINVAL; | |
369 | ||
370 | if (scsi_device_set_state(sdev, state)) | |
371 | return -EINVAL; | |
372 | return count; | |
373 | } | |
374 | ||
375 | static ssize_t | |
376 | show_state_field(struct device *dev, char *buf) | |
377 | { | |
378 | struct scsi_device *sdev = to_scsi_device(dev); | |
379 | const char *name = scsi_device_state_name(sdev->sdev_state); | |
380 | ||
381 | if (!name) | |
382 | return -EINVAL; | |
383 | ||
384 | return snprintf(buf, 20, "%s\n", name); | |
385 | } | |
386 | ||
387 | static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); | |
388 | ||
389 | static ssize_t | |
390 | show_queue_type_field(struct device *dev, char *buf) | |
391 | { | |
392 | struct scsi_device *sdev = to_scsi_device(dev); | |
393 | const char *name = "none"; | |
394 | ||
395 | if (sdev->ordered_tags) | |
396 | name = "ordered"; | |
397 | else if (sdev->simple_tags) | |
398 | name = "simple"; | |
399 | ||
400 | return snprintf(buf, 20, "%s\n", name); | |
401 | } | |
402 | ||
403 | static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL); | |
404 | ||
405 | static ssize_t | |
406 | show_iostat_counterbits(struct device *dev, char *buf) | |
407 | { | |
408 | return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); | |
409 | } | |
410 | ||
411 | static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); | |
412 | ||
413 | #define show_sdev_iostat(field) \ | |
414 | static ssize_t \ | |
415 | show_iostat_##field(struct device *dev, char *buf) \ | |
416 | { \ | |
417 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
418 | unsigned long long count = atomic_read(&sdev->field); \ | |
419 | return snprintf(buf, 20, "0x%llx\n", count); \ | |
420 | } \ | |
421 | static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) | |
422 | ||
423 | show_sdev_iostat(iorequest_cnt); | |
424 | show_sdev_iostat(iodone_cnt); | |
425 | show_sdev_iostat(ioerr_cnt); | |
426 | ||
427 | ||
428 | /* Default template for device attributes. May NOT be modified */ | |
429 | static struct device_attribute *scsi_sysfs_sdev_attrs[] = { | |
430 | &dev_attr_device_blocked, | |
431 | &dev_attr_queue_depth, | |
432 | &dev_attr_queue_type, | |
433 | &dev_attr_type, | |
434 | &dev_attr_scsi_level, | |
435 | &dev_attr_vendor, | |
436 | &dev_attr_model, | |
437 | &dev_attr_rev, | |
438 | &dev_attr_rescan, | |
439 | &dev_attr_delete, | |
440 | &dev_attr_state, | |
441 | &dev_attr_timeout, | |
442 | &dev_attr_iocounterbits, | |
443 | &dev_attr_iorequest_cnt, | |
444 | &dev_attr_iodone_cnt, | |
445 | &dev_attr_ioerr_cnt, | |
446 | NULL | |
447 | }; | |
448 | ||
449 | static ssize_t sdev_store_queue_depth_rw(struct device *dev, const char *buf, | |
450 | size_t count) | |
451 | { | |
452 | int depth, retval; | |
453 | struct scsi_device *sdev = to_scsi_device(dev); | |
454 | struct scsi_host_template *sht = sdev->host->hostt; | |
455 | ||
456 | if (!sht->change_queue_depth) | |
457 | return -EINVAL; | |
458 | ||
459 | depth = simple_strtoul(buf, NULL, 0); | |
460 | ||
461 | if (depth < 1) | |
462 | return -EINVAL; | |
463 | ||
464 | retval = sht->change_queue_depth(sdev, depth); | |
465 | if (retval < 0) | |
466 | return retval; | |
467 | ||
468 | return count; | |
469 | } | |
470 | ||
471 | static struct device_attribute sdev_attr_queue_depth_rw = | |
472 | __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, | |
473 | sdev_store_queue_depth_rw); | |
474 | ||
475 | static ssize_t sdev_store_queue_type_rw(struct device *dev, const char *buf, | |
476 | size_t count) | |
477 | { | |
478 | struct scsi_device *sdev = to_scsi_device(dev); | |
479 | struct scsi_host_template *sht = sdev->host->hostt; | |
480 | int tag_type = 0, retval; | |
481 | int prev_tag_type = scsi_get_tag_type(sdev); | |
482 | ||
483 | if (!sdev->tagged_supported || !sht->change_queue_type) | |
484 | return -EINVAL; | |
485 | ||
486 | if (strncmp(buf, "ordered", 7) == 0) | |
487 | tag_type = MSG_ORDERED_TAG; | |
488 | else if (strncmp(buf, "simple", 6) == 0) | |
489 | tag_type = MSG_SIMPLE_TAG; | |
490 | else if (strncmp(buf, "none", 4) != 0) | |
491 | return -EINVAL; | |
492 | ||
493 | if (tag_type == prev_tag_type) | |
494 | return count; | |
495 | ||
496 | retval = sht->change_queue_type(sdev, tag_type); | |
497 | if (retval < 0) | |
498 | return retval; | |
499 | ||
500 | return count; | |
501 | } | |
502 | ||
503 | static struct device_attribute sdev_attr_queue_type_rw = | |
504 | __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, | |
505 | sdev_store_queue_type_rw); | |
506 | ||
507 | static struct device_attribute *attr_changed_internally( | |
508 | struct Scsi_Host *shost, | |
509 | struct device_attribute * attr) | |
510 | { | |
511 | if (!strcmp("queue_depth", attr->attr.name) | |
512 | && shost->hostt->change_queue_depth) | |
513 | return &sdev_attr_queue_depth_rw; | |
514 | else if (!strcmp("queue_type", attr->attr.name) | |
515 | && shost->hostt->change_queue_type) | |
516 | return &sdev_attr_queue_type_rw; | |
517 | return attr; | |
518 | } | |
519 | ||
520 | ||
521 | static struct device_attribute *attr_overridden( | |
522 | struct device_attribute **attrs, | |
523 | struct device_attribute *attr) | |
524 | { | |
525 | int i; | |
526 | ||
527 | if (!attrs) | |
528 | return NULL; | |
529 | for (i = 0; attrs[i]; i++) | |
530 | if (!strcmp(attrs[i]->attr.name, attr->attr.name)) | |
531 | return attrs[i]; | |
532 | return NULL; | |
533 | } | |
534 | ||
535 | static int attr_add(struct device *dev, struct device_attribute *attr) | |
536 | { | |
537 | struct device_attribute *base_attr; | |
538 | ||
539 | /* | |
540 | * Spare the caller from having to copy things it's not interested in. | |
541 | */ | |
542 | base_attr = attr_overridden(scsi_sysfs_sdev_attrs, attr); | |
543 | if (base_attr) { | |
544 | /* extend permissions */ | |
545 | attr->attr.mode |= base_attr->attr.mode; | |
546 | ||
547 | /* override null show/store with default */ | |
548 | if (!attr->show) | |
549 | attr->show = base_attr->show; | |
550 | if (!attr->store) | |
551 | attr->store = base_attr->store; | |
552 | } | |
553 | ||
554 | return device_create_file(dev, attr); | |
555 | } | |
556 | ||
557 | /** | |
558 | * scsi_sysfs_add_sdev - add scsi device to sysfs | |
559 | * @sdev: scsi_device to add | |
560 | * | |
561 | * Return value: | |
562 | * 0 on Success / non-zero on Failure | |
563 | **/ | |
564 | int scsi_sysfs_add_sdev(struct scsi_device *sdev) | |
565 | { | |
566 | int error, i; | |
567 | ||
568 | if ((error = scsi_device_set_state(sdev, SDEV_RUNNING)) != 0) | |
569 | return error; | |
570 | ||
571 | error = device_add(&sdev->sdev_gendev); | |
572 | if (error) { | |
573 | put_device(sdev->sdev_gendev.parent); | |
574 | printk(KERN_INFO "error 1\n"); | |
575 | return error; | |
576 | } | |
577 | error = class_device_add(&sdev->sdev_classdev); | |
578 | if (error) { | |
579 | printk(KERN_INFO "error 2\n"); | |
580 | goto clean_device; | |
581 | } | |
582 | ||
583 | /* take a reference for the sdev_classdev; this is | |
584 | * released by the sdev_class .release */ | |
585 | get_device(&sdev->sdev_gendev); | |
586 | if (sdev->host->hostt->sdev_attrs) { | |
587 | for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { | |
588 | error = attr_add(&sdev->sdev_gendev, | |
589 | sdev->host->hostt->sdev_attrs[i]); | |
590 | if (error) { | |
591 | scsi_remove_device(sdev); | |
592 | goto out; | |
593 | } | |
594 | } | |
595 | } | |
596 | ||
597 | for (i = 0; scsi_sysfs_sdev_attrs[i]; i++) { | |
598 | if (!attr_overridden(sdev->host->hostt->sdev_attrs, | |
599 | scsi_sysfs_sdev_attrs[i])) { | |
600 | struct device_attribute * attr = | |
601 | attr_changed_internally(sdev->host, | |
602 | scsi_sysfs_sdev_attrs[i]); | |
603 | error = device_create_file(&sdev->sdev_gendev, attr); | |
604 | if (error) { | |
605 | scsi_remove_device(sdev); | |
606 | goto out; | |
607 | } | |
608 | } | |
609 | } | |
610 | ||
611 | transport_add_device(&sdev->sdev_gendev); | |
612 | out: | |
613 | return error; | |
614 | ||
615 | clean_device: | |
616 | scsi_device_set_state(sdev, SDEV_CANCEL); | |
617 | ||
618 | device_del(&sdev->sdev_gendev); | |
619 | transport_destroy_device(&sdev->sdev_gendev); | |
620 | put_device(&sdev->sdev_gendev); | |
621 | ||
622 | return error; | |
623 | } | |
624 | ||
625 | /** | |
626 | * scsi_remove_device - unregister a device from the scsi bus | |
627 | * @sdev: scsi_device to unregister | |
628 | **/ | |
629 | void scsi_remove_device(struct scsi_device *sdev) | |
630 | { | |
631 | struct Scsi_Host *shost = sdev->host; | |
632 | ||
633 | down(&shost->scan_mutex); | |
634 | if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0) | |
635 | goto out; | |
636 | ||
637 | class_device_unregister(&sdev->sdev_classdev); | |
638 | device_del(&sdev->sdev_gendev); | |
639 | scsi_device_set_state(sdev, SDEV_DEL); | |
640 | if (sdev->host->hostt->slave_destroy) | |
641 | sdev->host->hostt->slave_destroy(sdev); | |
642 | transport_unregister_device(&sdev->sdev_gendev); | |
643 | put_device(&sdev->sdev_gendev); | |
644 | out: | |
645 | up(&shost->scan_mutex); | |
646 | } | |
647 | EXPORT_SYMBOL(scsi_remove_device); | |
648 | ||
649 | void __scsi_remove_target(struct scsi_target *starget) | |
650 | { | |
651 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
652 | unsigned long flags; | |
653 | struct scsi_device *sdev, *tmp; | |
654 | ||
655 | spin_lock_irqsave(shost->host_lock, flags); | |
656 | starget->reap_ref++; | |
657 | list_for_each_entry_safe(sdev, tmp, &shost->__devices, siblings) { | |
658 | if (sdev->channel != starget->channel || | |
659 | sdev->id != starget->id) | |
660 | continue; | |
661 | spin_unlock_irqrestore(shost->host_lock, flags); | |
662 | scsi_remove_device(sdev); | |
663 | spin_lock_irqsave(shost->host_lock, flags); | |
664 | } | |
665 | spin_unlock_irqrestore(shost->host_lock, flags); | |
666 | scsi_target_reap(starget); | |
667 | } | |
668 | ||
669 | /** | |
670 | * scsi_remove_target - try to remove a target and all its devices | |
671 | * @dev: generic starget or parent of generic stargets to be removed | |
672 | * | |
673 | * Note: This is slightly racy. It is possible that if the user | |
674 | * requests the addition of another device then the target won't be | |
675 | * removed. | |
676 | */ | |
677 | void scsi_remove_target(struct device *dev) | |
678 | { | |
679 | struct device *rdev, *idev, *next; | |
680 | ||
681 | if (scsi_is_target_device(dev)) { | |
682 | __scsi_remove_target(to_scsi_target(dev)); | |
683 | return; | |
684 | } | |
685 | ||
686 | rdev = get_device(dev); | |
687 | list_for_each_entry_safe(idev, next, &dev->children, node) { | |
688 | if (scsi_is_target_device(idev)) | |
689 | __scsi_remove_target(to_scsi_target(idev)); | |
690 | } | |
691 | put_device(rdev); | |
692 | } | |
693 | EXPORT_SYMBOL(scsi_remove_target); | |
694 | ||
695 | int scsi_register_driver(struct device_driver *drv) | |
696 | { | |
697 | drv->bus = &scsi_bus_type; | |
698 | ||
699 | return driver_register(drv); | |
700 | } | |
701 | EXPORT_SYMBOL(scsi_register_driver); | |
702 | ||
703 | int scsi_register_interface(struct class_interface *intf) | |
704 | { | |
705 | intf->class = &sdev_class; | |
706 | ||
707 | return class_interface_register(intf); | |
708 | } | |
709 | EXPORT_SYMBOL(scsi_register_interface); | |
710 | ||
711 | ||
712 | static struct class_device_attribute *class_attr_overridden( | |
713 | struct class_device_attribute **attrs, | |
714 | struct class_device_attribute *attr) | |
715 | { | |
716 | int i; | |
717 | ||
718 | if (!attrs) | |
719 | return NULL; | |
720 | for (i = 0; attrs[i]; i++) | |
721 | if (!strcmp(attrs[i]->attr.name, attr->attr.name)) | |
722 | return attrs[i]; | |
723 | return NULL; | |
724 | } | |
725 | ||
726 | static int class_attr_add(struct class_device *classdev, | |
727 | struct class_device_attribute *attr) | |
728 | { | |
729 | struct class_device_attribute *base_attr; | |
730 | ||
731 | /* | |
732 | * Spare the caller from having to copy things it's not interested in. | |
733 | */ | |
734 | base_attr = class_attr_overridden(scsi_sysfs_shost_attrs, attr); | |
735 | if (base_attr) { | |
736 | /* extend permissions */ | |
737 | attr->attr.mode |= base_attr->attr.mode; | |
738 | ||
739 | /* override null show/store with default */ | |
740 | if (!attr->show) | |
741 | attr->show = base_attr->show; | |
742 | if (!attr->store) | |
743 | attr->store = base_attr->store; | |
744 | } | |
745 | ||
746 | return class_device_create_file(classdev, attr); | |
747 | } | |
748 | ||
749 | /** | |
750 | * scsi_sysfs_add_host - add scsi host to subsystem | |
751 | * @shost: scsi host struct to add to subsystem | |
752 | * @dev: parent struct device pointer | |
753 | **/ | |
754 | int scsi_sysfs_add_host(struct Scsi_Host *shost) | |
755 | { | |
756 | int error, i; | |
757 | ||
758 | if (shost->hostt->shost_attrs) { | |
759 | for (i = 0; shost->hostt->shost_attrs[i]; i++) { | |
760 | error = class_attr_add(&shost->shost_classdev, | |
761 | shost->hostt->shost_attrs[i]); | |
762 | if (error) | |
763 | return error; | |
764 | } | |
765 | } | |
766 | ||
767 | for (i = 0; scsi_sysfs_shost_attrs[i]; i++) { | |
768 | if (!class_attr_overridden(shost->hostt->shost_attrs, | |
769 | scsi_sysfs_shost_attrs[i])) { | |
770 | error = class_device_create_file(&shost->shost_classdev, | |
771 | scsi_sysfs_shost_attrs[i]); | |
772 | if (error) | |
773 | return error; | |
774 | } | |
775 | } | |
776 | ||
777 | transport_register_device(&shost->shost_gendev); | |
778 | return 0; | |
779 | } | |
780 | ||
781 | void scsi_sysfs_device_initialize(struct scsi_device *sdev) | |
782 | { | |
783 | unsigned long flags; | |
784 | struct Scsi_Host *shost = sdev->host; | |
785 | struct scsi_target *starget = sdev->sdev_target; | |
786 | ||
787 | device_initialize(&sdev->sdev_gendev); | |
788 | sdev->sdev_gendev.bus = &scsi_bus_type; | |
789 | sdev->sdev_gendev.release = scsi_device_dev_release; | |
790 | sprintf(sdev->sdev_gendev.bus_id,"%d:%d:%d:%d", | |
791 | sdev->host->host_no, sdev->channel, sdev->id, | |
792 | sdev->lun); | |
793 | ||
794 | class_device_initialize(&sdev->sdev_classdev); | |
795 | sdev->sdev_classdev.dev = &sdev->sdev_gendev; | |
796 | sdev->sdev_classdev.class = &sdev_class; | |
797 | snprintf(sdev->sdev_classdev.class_id, BUS_ID_SIZE, | |
798 | "%d:%d:%d:%d", sdev->host->host_no, | |
799 | sdev->channel, sdev->id, sdev->lun); | |
800 | sdev->scsi_level = SCSI_2; | |
801 | transport_setup_device(&sdev->sdev_gendev); | |
802 | spin_lock_irqsave(shost->host_lock, flags); | |
803 | list_add_tail(&sdev->same_target_siblings, &starget->devices); | |
804 | list_add_tail(&sdev->siblings, &shost->__devices); | |
805 | spin_unlock_irqrestore(shost->host_lock, flags); | |
806 | } | |
807 | ||
808 | int scsi_is_sdev_device(const struct device *dev) | |
809 | { | |
810 | return dev->release == scsi_device_dev_release; | |
811 | } | |
812 | EXPORT_SYMBOL(scsi_is_sdev_device); | |
813 | ||
814 | /* A blank transport template that is used in drivers that don't | |
815 | * yet implement Transport Attributes */ | |
816 | struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |