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Commit | Line | Data |
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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); | |
c2a9331c JB |
174 | /* temporary expedient, try to catch use of queue lock |
175 | * after free of sdev */ | |
176 | sdev->request_queue = NULL; | |
1da177e4 LT |
177 | } |
178 | ||
179 | scsi_target_reap(scsi_target(sdev)); | |
180 | ||
181 | kfree(sdev->inquiry); | |
182 | kfree(sdev); | |
183 | ||
184 | if (parent) | |
185 | put_device(parent); | |
186 | } | |
187 | ||
188 | struct class sdev_class = { | |
189 | .name = "scsi_device", | |
190 | .release = scsi_device_cls_release, | |
191 | }; | |
192 | ||
193 | /* all probing is done in the individual ->probe routines */ | |
194 | static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) | |
195 | { | |
196 | struct scsi_device *sdp = to_scsi_device(dev); | |
197 | if (sdp->no_uld_attach) | |
198 | return 0; | |
199 | return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; | |
200 | } | |
201 | ||
202 | struct bus_type scsi_bus_type = { | |
203 | .name = "scsi", | |
204 | .match = scsi_bus_match, | |
205 | }; | |
206 | ||
207 | int scsi_sysfs_register(void) | |
208 | { | |
209 | int error; | |
210 | ||
211 | error = bus_register(&scsi_bus_type); | |
212 | if (!error) { | |
213 | error = class_register(&sdev_class); | |
214 | if (error) | |
215 | bus_unregister(&scsi_bus_type); | |
216 | } | |
217 | ||
218 | return error; | |
219 | } | |
220 | ||
221 | void scsi_sysfs_unregister(void) | |
222 | { | |
223 | class_unregister(&sdev_class); | |
224 | bus_unregister(&scsi_bus_type); | |
225 | } | |
226 | ||
227 | /* | |
228 | * sdev_show_function: macro to create an attr function that can be used to | |
229 | * show a non-bit field. | |
230 | */ | |
231 | #define sdev_show_function(field, format_string) \ | |
232 | static ssize_t \ | |
233 | sdev_show_##field (struct device *dev, char *buf) \ | |
234 | { \ | |
235 | struct scsi_device *sdev; \ | |
236 | sdev = to_scsi_device(dev); \ | |
237 | return snprintf (buf, 20, format_string, sdev->field); \ | |
238 | } \ | |
239 | ||
240 | /* | |
241 | * sdev_rd_attr: macro to create a function and attribute variable for a | |
242 | * read only field. | |
243 | */ | |
244 | #define sdev_rd_attr(field, format_string) \ | |
245 | sdev_show_function(field, format_string) \ | |
246 | static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); | |
247 | ||
248 | ||
249 | /* | |
250 | * sdev_rd_attr: create a function and attribute variable for a | |
251 | * read/write field. | |
252 | */ | |
253 | #define sdev_rw_attr(field, format_string) \ | |
254 | sdev_show_function(field, format_string) \ | |
255 | \ | |
256 | static ssize_t \ | |
257 | sdev_store_##field (struct device *dev, const char *buf, size_t count) \ | |
258 | { \ | |
259 | struct scsi_device *sdev; \ | |
260 | sdev = to_scsi_device(dev); \ | |
261 | snscanf (buf, 20, format_string, &sdev->field); \ | |
262 | return count; \ | |
263 | } \ | |
264 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
265 | ||
266 | /* Currently we don't export bit fields, but we might in future, | |
267 | * so leave this code in */ | |
268 | #if 0 | |
269 | /* | |
270 | * sdev_rd_attr: create a function and attribute variable for a | |
271 | * read/write bit field. | |
272 | */ | |
273 | #define sdev_rw_attr_bit(field) \ | |
274 | sdev_show_function(field, "%d\n") \ | |
275 | \ | |
276 | static ssize_t \ | |
277 | sdev_store_##field (struct device *dev, const char *buf, size_t count) \ | |
278 | { \ | |
279 | int ret; \ | |
280 | struct scsi_device *sdev; \ | |
281 | ret = scsi_sdev_check_buf_bit(buf); \ | |
282 | if (ret >= 0) { \ | |
283 | sdev = to_scsi_device(dev); \ | |
284 | sdev->field = ret; \ | |
285 | ret = count; \ | |
286 | } \ | |
287 | return ret; \ | |
288 | } \ | |
289 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
290 | ||
291 | /* | |
292 | * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", | |
293 | * else return -EINVAL. | |
294 | */ | |
295 | static int scsi_sdev_check_buf_bit(const char *buf) | |
296 | { | |
297 | if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { | |
298 | if (buf[0] == '1') | |
299 | return 1; | |
300 | else if (buf[0] == '0') | |
301 | return 0; | |
302 | else | |
303 | return -EINVAL; | |
304 | } else | |
305 | return -EINVAL; | |
306 | } | |
307 | #endif | |
308 | /* | |
309 | * Create the actual show/store functions and data structures. | |
310 | */ | |
311 | sdev_rd_attr (device_blocked, "%d\n"); | |
312 | sdev_rd_attr (queue_depth, "%d\n"); | |
313 | sdev_rd_attr (type, "%d\n"); | |
314 | sdev_rd_attr (scsi_level, "%d\n"); | |
315 | sdev_rd_attr (vendor, "%.8s\n"); | |
316 | sdev_rd_attr (model, "%.16s\n"); | |
317 | sdev_rd_attr (rev, "%.4s\n"); | |
318 | ||
319 | static ssize_t | |
320 | sdev_show_timeout (struct device *dev, char *buf) | |
321 | { | |
322 | struct scsi_device *sdev; | |
323 | sdev = to_scsi_device(dev); | |
324 | return snprintf (buf, 20, "%d\n", sdev->timeout / HZ); | |
325 | } | |
326 | ||
327 | static ssize_t | |
328 | sdev_store_timeout (struct device *dev, const char *buf, size_t count) | |
329 | { | |
330 | struct scsi_device *sdev; | |
331 | int timeout; | |
332 | sdev = to_scsi_device(dev); | |
333 | sscanf (buf, "%d\n", &timeout); | |
334 | sdev->timeout = timeout * HZ; | |
335 | return count; | |
336 | } | |
337 | static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); | |
338 | ||
339 | static ssize_t | |
340 | store_rescan_field (struct device *dev, const char *buf, size_t count) | |
341 | { | |
342 | scsi_rescan_device(dev); | |
343 | return count; | |
344 | } | |
345 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); | |
346 | ||
347 | static ssize_t sdev_store_delete(struct device *dev, const char *buf, | |
348 | size_t count) | |
349 | { | |
350 | scsi_remove_device(to_scsi_device(dev)); | |
351 | return count; | |
352 | }; | |
353 | static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); | |
354 | ||
355 | static ssize_t | |
356 | store_state_field(struct device *dev, const char *buf, size_t count) | |
357 | { | |
358 | int i; | |
359 | struct scsi_device *sdev = to_scsi_device(dev); | |
360 | enum scsi_device_state state = 0; | |
361 | ||
362 | for (i = 0; i < sizeof(sdev_states)/sizeof(sdev_states[0]); i++) { | |
363 | const int len = strlen(sdev_states[i].name); | |
364 | if (strncmp(sdev_states[i].name, buf, len) == 0 && | |
365 | buf[len] == '\n') { | |
366 | state = sdev_states[i].value; | |
367 | break; | |
368 | } | |
369 | } | |
370 | if (!state) | |
371 | return -EINVAL; | |
372 | ||
373 | if (scsi_device_set_state(sdev, state)) | |
374 | return -EINVAL; | |
375 | return count; | |
376 | } | |
377 | ||
378 | static ssize_t | |
379 | show_state_field(struct device *dev, char *buf) | |
380 | { | |
381 | struct scsi_device *sdev = to_scsi_device(dev); | |
382 | const char *name = scsi_device_state_name(sdev->sdev_state); | |
383 | ||
384 | if (!name) | |
385 | return -EINVAL; | |
386 | ||
387 | return snprintf(buf, 20, "%s\n", name); | |
388 | } | |
389 | ||
390 | static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); | |
391 | ||
392 | static ssize_t | |
393 | show_queue_type_field(struct device *dev, char *buf) | |
394 | { | |
395 | struct scsi_device *sdev = to_scsi_device(dev); | |
396 | const char *name = "none"; | |
397 | ||
398 | if (sdev->ordered_tags) | |
399 | name = "ordered"; | |
400 | else if (sdev->simple_tags) | |
401 | name = "simple"; | |
402 | ||
403 | return snprintf(buf, 20, "%s\n", name); | |
404 | } | |
405 | ||
406 | static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL); | |
407 | ||
408 | static ssize_t | |
409 | show_iostat_counterbits(struct device *dev, char *buf) | |
410 | { | |
411 | return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); | |
412 | } | |
413 | ||
414 | static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); | |
415 | ||
416 | #define show_sdev_iostat(field) \ | |
417 | static ssize_t \ | |
418 | show_iostat_##field(struct device *dev, char *buf) \ | |
419 | { \ | |
420 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
421 | unsigned long long count = atomic_read(&sdev->field); \ | |
422 | return snprintf(buf, 20, "0x%llx\n", count); \ | |
423 | } \ | |
424 | static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) | |
425 | ||
426 | show_sdev_iostat(iorequest_cnt); | |
427 | show_sdev_iostat(iodone_cnt); | |
428 | show_sdev_iostat(ioerr_cnt); | |
429 | ||
430 | ||
431 | /* Default template for device attributes. May NOT be modified */ | |
432 | static struct device_attribute *scsi_sysfs_sdev_attrs[] = { | |
433 | &dev_attr_device_blocked, | |
434 | &dev_attr_queue_depth, | |
435 | &dev_attr_queue_type, | |
436 | &dev_attr_type, | |
437 | &dev_attr_scsi_level, | |
438 | &dev_attr_vendor, | |
439 | &dev_attr_model, | |
440 | &dev_attr_rev, | |
441 | &dev_attr_rescan, | |
442 | &dev_attr_delete, | |
443 | &dev_attr_state, | |
444 | &dev_attr_timeout, | |
445 | &dev_attr_iocounterbits, | |
446 | &dev_attr_iorequest_cnt, | |
447 | &dev_attr_iodone_cnt, | |
448 | &dev_attr_ioerr_cnt, | |
449 | NULL | |
450 | }; | |
451 | ||
452 | static ssize_t sdev_store_queue_depth_rw(struct device *dev, const char *buf, | |
453 | size_t count) | |
454 | { | |
455 | int depth, retval; | |
456 | struct scsi_device *sdev = to_scsi_device(dev); | |
457 | struct scsi_host_template *sht = sdev->host->hostt; | |
458 | ||
459 | if (!sht->change_queue_depth) | |
460 | return -EINVAL; | |
461 | ||
462 | depth = simple_strtoul(buf, NULL, 0); | |
463 | ||
464 | if (depth < 1) | |
465 | return -EINVAL; | |
466 | ||
467 | retval = sht->change_queue_depth(sdev, depth); | |
468 | if (retval < 0) | |
469 | return retval; | |
470 | ||
471 | return count; | |
472 | } | |
473 | ||
474 | static struct device_attribute sdev_attr_queue_depth_rw = | |
475 | __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, | |
476 | sdev_store_queue_depth_rw); | |
477 | ||
478 | static ssize_t sdev_store_queue_type_rw(struct device *dev, const char *buf, | |
479 | size_t count) | |
480 | { | |
481 | struct scsi_device *sdev = to_scsi_device(dev); | |
482 | struct scsi_host_template *sht = sdev->host->hostt; | |
483 | int tag_type = 0, retval; | |
484 | int prev_tag_type = scsi_get_tag_type(sdev); | |
485 | ||
486 | if (!sdev->tagged_supported || !sht->change_queue_type) | |
487 | return -EINVAL; | |
488 | ||
489 | if (strncmp(buf, "ordered", 7) == 0) | |
490 | tag_type = MSG_ORDERED_TAG; | |
491 | else if (strncmp(buf, "simple", 6) == 0) | |
492 | tag_type = MSG_SIMPLE_TAG; | |
493 | else if (strncmp(buf, "none", 4) != 0) | |
494 | return -EINVAL; | |
495 | ||
496 | if (tag_type == prev_tag_type) | |
497 | return count; | |
498 | ||
499 | retval = sht->change_queue_type(sdev, tag_type); | |
500 | if (retval < 0) | |
501 | return retval; | |
502 | ||
503 | return count; | |
504 | } | |
505 | ||
506 | static struct device_attribute sdev_attr_queue_type_rw = | |
507 | __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, | |
508 | sdev_store_queue_type_rw); | |
509 | ||
510 | static struct device_attribute *attr_changed_internally( | |
511 | struct Scsi_Host *shost, | |
512 | struct device_attribute * attr) | |
513 | { | |
514 | if (!strcmp("queue_depth", attr->attr.name) | |
515 | && shost->hostt->change_queue_depth) | |
516 | return &sdev_attr_queue_depth_rw; | |
517 | else if (!strcmp("queue_type", attr->attr.name) | |
518 | && shost->hostt->change_queue_type) | |
519 | return &sdev_attr_queue_type_rw; | |
520 | return attr; | |
521 | } | |
522 | ||
523 | ||
524 | static struct device_attribute *attr_overridden( | |
525 | struct device_attribute **attrs, | |
526 | struct device_attribute *attr) | |
527 | { | |
528 | int i; | |
529 | ||
530 | if (!attrs) | |
531 | return NULL; | |
532 | for (i = 0; attrs[i]; i++) | |
533 | if (!strcmp(attrs[i]->attr.name, attr->attr.name)) | |
534 | return attrs[i]; | |
535 | return NULL; | |
536 | } | |
537 | ||
538 | static int attr_add(struct device *dev, struct device_attribute *attr) | |
539 | { | |
540 | struct device_attribute *base_attr; | |
541 | ||
542 | /* | |
543 | * Spare the caller from having to copy things it's not interested in. | |
544 | */ | |
545 | base_attr = attr_overridden(scsi_sysfs_sdev_attrs, attr); | |
546 | if (base_attr) { | |
547 | /* extend permissions */ | |
548 | attr->attr.mode |= base_attr->attr.mode; | |
549 | ||
550 | /* override null show/store with default */ | |
551 | if (!attr->show) | |
552 | attr->show = base_attr->show; | |
553 | if (!attr->store) | |
554 | attr->store = base_attr->store; | |
555 | } | |
556 | ||
557 | return device_create_file(dev, attr); | |
558 | } | |
559 | ||
560 | /** | |
561 | * scsi_sysfs_add_sdev - add scsi device to sysfs | |
562 | * @sdev: scsi_device to add | |
563 | * | |
564 | * Return value: | |
565 | * 0 on Success / non-zero on Failure | |
566 | **/ | |
567 | int scsi_sysfs_add_sdev(struct scsi_device *sdev) | |
568 | { | |
569 | int error, i; | |
570 | ||
571 | if ((error = scsi_device_set_state(sdev, SDEV_RUNNING)) != 0) | |
572 | return error; | |
573 | ||
574 | error = device_add(&sdev->sdev_gendev); | |
575 | if (error) { | |
576 | put_device(sdev->sdev_gendev.parent); | |
577 | printk(KERN_INFO "error 1\n"); | |
578 | return error; | |
579 | } | |
580 | error = class_device_add(&sdev->sdev_classdev); | |
581 | if (error) { | |
582 | printk(KERN_INFO "error 2\n"); | |
583 | goto clean_device; | |
584 | } | |
585 | ||
586 | /* take a reference for the sdev_classdev; this is | |
587 | * released by the sdev_class .release */ | |
588 | get_device(&sdev->sdev_gendev); | |
589 | if (sdev->host->hostt->sdev_attrs) { | |
590 | for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { | |
591 | error = attr_add(&sdev->sdev_gendev, | |
592 | sdev->host->hostt->sdev_attrs[i]); | |
593 | if (error) { | |
594 | scsi_remove_device(sdev); | |
595 | goto out; | |
596 | } | |
597 | } | |
598 | } | |
599 | ||
600 | for (i = 0; scsi_sysfs_sdev_attrs[i]; i++) { | |
601 | if (!attr_overridden(sdev->host->hostt->sdev_attrs, | |
602 | scsi_sysfs_sdev_attrs[i])) { | |
603 | struct device_attribute * attr = | |
604 | attr_changed_internally(sdev->host, | |
605 | scsi_sysfs_sdev_attrs[i]); | |
606 | error = device_create_file(&sdev->sdev_gendev, attr); | |
607 | if (error) { | |
608 | scsi_remove_device(sdev); | |
609 | goto out; | |
610 | } | |
611 | } | |
612 | } | |
613 | ||
614 | transport_add_device(&sdev->sdev_gendev); | |
615 | out: | |
616 | return error; | |
617 | ||
618 | clean_device: | |
619 | scsi_device_set_state(sdev, SDEV_CANCEL); | |
620 | ||
621 | device_del(&sdev->sdev_gendev); | |
622 | transport_destroy_device(&sdev->sdev_gendev); | |
623 | put_device(&sdev->sdev_gendev); | |
624 | ||
625 | return error; | |
626 | } | |
627 | ||
628 | /** | |
629 | * scsi_remove_device - unregister a device from the scsi bus | |
630 | * @sdev: scsi_device to unregister | |
631 | **/ | |
632 | void scsi_remove_device(struct scsi_device *sdev) | |
633 | { | |
634 | struct Scsi_Host *shost = sdev->host; | |
635 | ||
636 | down(&shost->scan_mutex); | |
637 | if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0) | |
638 | goto out; | |
639 | ||
640 | class_device_unregister(&sdev->sdev_classdev); | |
641 | device_del(&sdev->sdev_gendev); | |
642 | scsi_device_set_state(sdev, SDEV_DEL); | |
643 | if (sdev->host->hostt->slave_destroy) | |
644 | sdev->host->hostt->slave_destroy(sdev); | |
645 | transport_unregister_device(&sdev->sdev_gendev); | |
646 | put_device(&sdev->sdev_gendev); | |
647 | out: | |
648 | up(&shost->scan_mutex); | |
649 | } | |
650 | EXPORT_SYMBOL(scsi_remove_device); | |
651 | ||
652 | void __scsi_remove_target(struct scsi_target *starget) | |
653 | { | |
654 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
655 | unsigned long flags; | |
656 | struct scsi_device *sdev, *tmp; | |
657 | ||
658 | spin_lock_irqsave(shost->host_lock, flags); | |
659 | starget->reap_ref++; | |
660 | list_for_each_entry_safe(sdev, tmp, &shost->__devices, siblings) { | |
661 | if (sdev->channel != starget->channel || | |
662 | sdev->id != starget->id) | |
663 | continue; | |
664 | spin_unlock_irqrestore(shost->host_lock, flags); | |
665 | scsi_remove_device(sdev); | |
666 | spin_lock_irqsave(shost->host_lock, flags); | |
667 | } | |
668 | spin_unlock_irqrestore(shost->host_lock, flags); | |
669 | scsi_target_reap(starget); | |
670 | } | |
671 | ||
20b1e674 PM |
672 | static int __remove_child (struct device * dev, void * data) |
673 | { | |
674 | if (scsi_is_target_device(dev)) | |
675 | __scsi_remove_target(to_scsi_target(dev)); | |
676 | return 0; | |
677 | } | |
678 | ||
1da177e4 LT |
679 | /** |
680 | * scsi_remove_target - try to remove a target and all its devices | |
681 | * @dev: generic starget or parent of generic stargets to be removed | |
682 | * | |
683 | * Note: This is slightly racy. It is possible that if the user | |
684 | * requests the addition of another device then the target won't be | |
685 | * removed. | |
686 | */ | |
687 | void scsi_remove_target(struct device *dev) | |
688 | { | |
20b1e674 | 689 | struct device *rdev; |
1da177e4 LT |
690 | |
691 | if (scsi_is_target_device(dev)) { | |
692 | __scsi_remove_target(to_scsi_target(dev)); | |
693 | return; | |
694 | } | |
695 | ||
696 | rdev = get_device(dev); | |
20b1e674 | 697 | device_for_each_child(dev, NULL, __remove_child); |
1da177e4 LT |
698 | put_device(rdev); |
699 | } | |
700 | EXPORT_SYMBOL(scsi_remove_target); | |
701 | ||
702 | int scsi_register_driver(struct device_driver *drv) | |
703 | { | |
704 | drv->bus = &scsi_bus_type; | |
705 | ||
706 | return driver_register(drv); | |
707 | } | |
708 | EXPORT_SYMBOL(scsi_register_driver); | |
709 | ||
710 | int scsi_register_interface(struct class_interface *intf) | |
711 | { | |
712 | intf->class = &sdev_class; | |
713 | ||
714 | return class_interface_register(intf); | |
715 | } | |
716 | EXPORT_SYMBOL(scsi_register_interface); | |
717 | ||
718 | ||
719 | static struct class_device_attribute *class_attr_overridden( | |
720 | struct class_device_attribute **attrs, | |
721 | struct class_device_attribute *attr) | |
722 | { | |
723 | int i; | |
724 | ||
725 | if (!attrs) | |
726 | return NULL; | |
727 | for (i = 0; attrs[i]; i++) | |
728 | if (!strcmp(attrs[i]->attr.name, attr->attr.name)) | |
729 | return attrs[i]; | |
730 | return NULL; | |
731 | } | |
732 | ||
733 | static int class_attr_add(struct class_device *classdev, | |
734 | struct class_device_attribute *attr) | |
735 | { | |
736 | struct class_device_attribute *base_attr; | |
737 | ||
738 | /* | |
739 | * Spare the caller from having to copy things it's not interested in. | |
740 | */ | |
741 | base_attr = class_attr_overridden(scsi_sysfs_shost_attrs, attr); | |
742 | if (base_attr) { | |
743 | /* extend permissions */ | |
744 | attr->attr.mode |= base_attr->attr.mode; | |
745 | ||
746 | /* override null show/store with default */ | |
747 | if (!attr->show) | |
748 | attr->show = base_attr->show; | |
749 | if (!attr->store) | |
750 | attr->store = base_attr->store; | |
751 | } | |
752 | ||
753 | return class_device_create_file(classdev, attr); | |
754 | } | |
755 | ||
756 | /** | |
757 | * scsi_sysfs_add_host - add scsi host to subsystem | |
758 | * @shost: scsi host struct to add to subsystem | |
759 | * @dev: parent struct device pointer | |
760 | **/ | |
761 | int scsi_sysfs_add_host(struct Scsi_Host *shost) | |
762 | { | |
763 | int error, i; | |
764 | ||
765 | if (shost->hostt->shost_attrs) { | |
766 | for (i = 0; shost->hostt->shost_attrs[i]; i++) { | |
767 | error = class_attr_add(&shost->shost_classdev, | |
768 | shost->hostt->shost_attrs[i]); | |
769 | if (error) | |
770 | return error; | |
771 | } | |
772 | } | |
773 | ||
774 | for (i = 0; scsi_sysfs_shost_attrs[i]; i++) { | |
775 | if (!class_attr_overridden(shost->hostt->shost_attrs, | |
776 | scsi_sysfs_shost_attrs[i])) { | |
777 | error = class_device_create_file(&shost->shost_classdev, | |
778 | scsi_sysfs_shost_attrs[i]); | |
779 | if (error) | |
780 | return error; | |
781 | } | |
782 | } | |
783 | ||
784 | transport_register_device(&shost->shost_gendev); | |
785 | return 0; | |
786 | } | |
787 | ||
788 | void scsi_sysfs_device_initialize(struct scsi_device *sdev) | |
789 | { | |
790 | unsigned long flags; | |
791 | struct Scsi_Host *shost = sdev->host; | |
792 | struct scsi_target *starget = sdev->sdev_target; | |
793 | ||
794 | device_initialize(&sdev->sdev_gendev); | |
795 | sdev->sdev_gendev.bus = &scsi_bus_type; | |
796 | sdev->sdev_gendev.release = scsi_device_dev_release; | |
797 | sprintf(sdev->sdev_gendev.bus_id,"%d:%d:%d:%d", | |
798 | sdev->host->host_no, sdev->channel, sdev->id, | |
799 | sdev->lun); | |
800 | ||
801 | class_device_initialize(&sdev->sdev_classdev); | |
802 | sdev->sdev_classdev.dev = &sdev->sdev_gendev; | |
803 | sdev->sdev_classdev.class = &sdev_class; | |
804 | snprintf(sdev->sdev_classdev.class_id, BUS_ID_SIZE, | |
805 | "%d:%d:%d:%d", sdev->host->host_no, | |
806 | sdev->channel, sdev->id, sdev->lun); | |
807 | sdev->scsi_level = SCSI_2; | |
808 | transport_setup_device(&sdev->sdev_gendev); | |
809 | spin_lock_irqsave(shost->host_lock, flags); | |
810 | list_add_tail(&sdev->same_target_siblings, &starget->devices); | |
811 | list_add_tail(&sdev->siblings, &shost->__devices); | |
812 | spin_unlock_irqrestore(shost->host_lock, flags); | |
813 | } | |
814 | ||
815 | int scsi_is_sdev_device(const struct device *dev) | |
816 | { | |
817 | return dev->release == scsi_device_dev_release; | |
818 | } | |
819 | EXPORT_SYMBOL(scsi_is_sdev_device); | |
820 | ||
821 | /* A blank transport template that is used in drivers that don't | |
822 | * yet implement Transport Attributes */ | |
823 | struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |