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 | ||
d3301874 MA |
51 | static struct { |
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" }, | |
60 | }; | |
61 | const char *scsi_host_state_name(enum scsi_host_state state) | |
62 | { | |
63 | int i; | |
64 | char *name = NULL; | |
65 | ||
66 | for (i = 0; i < sizeof(shost_states)/sizeof(shost_states[0]); i++) { | |
67 | if (shost_states[i].value == state) { | |
68 | name = shost_states[i].name; | |
69 | break; | |
70 | } | |
71 | } | |
72 | return name; | |
73 | } | |
74 | ||
1da177e4 LT |
75 | static int check_set(unsigned int *val, char *src) |
76 | { | |
77 | char *last; | |
78 | ||
79 | if (strncmp(src, "-", 20) == 0) { | |
80 | *val = SCAN_WILD_CARD; | |
81 | } else { | |
82 | /* | |
83 | * Doesn't check for int overflow | |
84 | */ | |
85 | *val = simple_strtoul(src, &last, 0); | |
86 | if (*last != '\0') | |
87 | return 1; | |
88 | } | |
89 | return 0; | |
90 | } | |
91 | ||
92 | static int scsi_scan(struct Scsi_Host *shost, const char *str) | |
93 | { | |
94 | char s1[15], s2[15], s3[15], junk; | |
95 | unsigned int channel, id, lun; | |
96 | int res; | |
97 | ||
98 | res = sscanf(str, "%10s %10s %10s %c", s1, s2, s3, &junk); | |
99 | if (res != 3) | |
100 | return -EINVAL; | |
101 | if (check_set(&channel, s1)) | |
102 | return -EINVAL; | |
103 | if (check_set(&id, s2)) | |
104 | return -EINVAL; | |
105 | if (check_set(&lun, s3)) | |
106 | return -EINVAL; | |
107 | res = scsi_scan_host_selected(shost, channel, id, lun, 1); | |
108 | return res; | |
109 | } | |
110 | ||
111 | /* | |
112 | * shost_show_function: macro to create an attr function that can be used to | |
113 | * show a non-bit field. | |
114 | */ | |
115 | #define shost_show_function(name, field, format_string) \ | |
116 | static ssize_t \ | |
117 | show_##name (struct class_device *class_dev, char *buf) \ | |
118 | { \ | |
119 | struct Scsi_Host *shost = class_to_shost(class_dev); \ | |
120 | return snprintf (buf, 20, format_string, shost->field); \ | |
121 | } | |
122 | ||
123 | /* | |
124 | * shost_rd_attr: macro to create a function and attribute variable for a | |
125 | * read only field. | |
126 | */ | |
127 | #define shost_rd_attr2(name, field, format_string) \ | |
128 | shost_show_function(name, field, format_string) \ | |
129 | static CLASS_DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); | |
130 | ||
131 | #define shost_rd_attr(field, format_string) \ | |
132 | shost_rd_attr2(field, field, format_string) | |
133 | ||
134 | /* | |
135 | * Create the actual show/store functions and data structures. | |
136 | */ | |
137 | ||
138 | static ssize_t store_scan(struct class_device *class_dev, const char *buf, | |
139 | size_t count) | |
140 | { | |
141 | struct Scsi_Host *shost = class_to_shost(class_dev); | |
142 | int res; | |
143 | ||
144 | res = scsi_scan(shost, buf); | |
145 | if (res == 0) | |
146 | res = count; | |
147 | return res; | |
148 | }; | |
149 | static CLASS_DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); | |
150 | ||
d3301874 MA |
151 | static ssize_t |
152 | store_shost_state(struct class_device *class_dev, const char *buf, size_t count) | |
153 | { | |
154 | int i; | |
155 | struct Scsi_Host *shost = class_to_shost(class_dev); | |
156 | enum scsi_host_state state = 0; | |
157 | ||
158 | for (i = 0; i < sizeof(shost_states)/sizeof(shost_states[0]); i++) { | |
159 | const int len = strlen(shost_states[i].name); | |
160 | if (strncmp(shost_states[i].name, buf, len) == 0 && | |
161 | buf[len] == '\n') { | |
162 | state = shost_states[i].value; | |
163 | break; | |
164 | } | |
165 | } | |
166 | if (!state) | |
167 | return -EINVAL; | |
168 | ||
169 | if (scsi_host_set_state(shost, state)) | |
170 | return -EINVAL; | |
171 | return count; | |
172 | } | |
173 | ||
174 | static ssize_t | |
175 | show_shost_state(struct class_device *class_dev, char *buf) | |
176 | { | |
177 | struct Scsi_Host *shost = class_to_shost(class_dev); | |
178 | const char *name = scsi_host_state_name(shost->shost_state); | |
179 | ||
180 | if (!name) | |
181 | return -EINVAL; | |
182 | ||
183 | return snprintf(buf, 20, "%s\n", name); | |
184 | } | |
185 | ||
186 | static CLASS_DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state); | |
187 | ||
1da177e4 LT |
188 | shost_rd_attr(unique_id, "%u\n"); |
189 | shost_rd_attr(host_busy, "%hu\n"); | |
190 | shost_rd_attr(cmd_per_lun, "%hd\n"); | |
191 | shost_rd_attr(sg_tablesize, "%hu\n"); | |
192 | shost_rd_attr(unchecked_isa_dma, "%d\n"); | |
193 | shost_rd_attr2(proc_name, hostt->proc_name, "%s\n"); | |
194 | ||
195 | static struct class_device_attribute *scsi_sysfs_shost_attrs[] = { | |
196 | &class_device_attr_unique_id, | |
197 | &class_device_attr_host_busy, | |
198 | &class_device_attr_cmd_per_lun, | |
199 | &class_device_attr_sg_tablesize, | |
200 | &class_device_attr_unchecked_isa_dma, | |
201 | &class_device_attr_proc_name, | |
202 | &class_device_attr_scan, | |
d3301874 | 203 | &class_device_attr_state, |
1da177e4 LT |
204 | NULL |
205 | }; | |
206 | ||
207 | static void scsi_device_cls_release(struct class_device *class_dev) | |
208 | { | |
209 | struct scsi_device *sdev; | |
210 | ||
211 | sdev = class_to_sdev(class_dev); | |
212 | put_device(&sdev->sdev_gendev); | |
213 | } | |
214 | ||
52c1da39 | 215 | static void scsi_device_dev_release(struct device *dev) |
1da177e4 LT |
216 | { |
217 | struct scsi_device *sdev; | |
218 | struct device *parent; | |
219 | struct scsi_target *starget; | |
220 | unsigned long flags; | |
221 | ||
222 | parent = dev->parent; | |
223 | sdev = to_scsi_device(dev); | |
224 | starget = to_scsi_target(parent); | |
225 | ||
226 | spin_lock_irqsave(sdev->host->host_lock, flags); | |
227 | starget->reap_ref++; | |
228 | list_del(&sdev->siblings); | |
229 | list_del(&sdev->same_target_siblings); | |
230 | list_del(&sdev->starved_entry); | |
231 | spin_unlock_irqrestore(sdev->host->host_lock, flags); | |
232 | ||
233 | if (sdev->request_queue) { | |
234 | sdev->request_queue->queuedata = NULL; | |
235 | scsi_free_queue(sdev->request_queue); | |
c2a9331c | 236 | /* temporary expedient, try to catch use of queue lock |
237 | * after free of sdev */ | |
238 | sdev->request_queue = NULL; | |
1da177e4 LT |
239 | } |
240 | ||
241 | scsi_target_reap(scsi_target(sdev)); | |
242 | ||
243 | kfree(sdev->inquiry); | |
244 | kfree(sdev); | |
245 | ||
246 | if (parent) | |
247 | put_device(parent); | |
248 | } | |
249 | ||
52c1da39 | 250 | static struct class sdev_class = { |
1da177e4 LT |
251 | .name = "scsi_device", |
252 | .release = scsi_device_cls_release, | |
253 | }; | |
254 | ||
255 | /* all probing is done in the individual ->probe routines */ | |
256 | static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) | |
257 | { | |
258 | struct scsi_device *sdp = to_scsi_device(dev); | |
259 | if (sdp->no_uld_attach) | |
260 | return 0; | |
261 | return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; | |
262 | } | |
263 | ||
264 | struct bus_type scsi_bus_type = { | |
265 | .name = "scsi", | |
266 | .match = scsi_bus_match, | |
267 | }; | |
268 | ||
269 | int scsi_sysfs_register(void) | |
270 | { | |
271 | int error; | |
272 | ||
273 | error = bus_register(&scsi_bus_type); | |
274 | if (!error) { | |
275 | error = class_register(&sdev_class); | |
276 | if (error) | |
277 | bus_unregister(&scsi_bus_type); | |
278 | } | |
279 | ||
280 | return error; | |
281 | } | |
282 | ||
283 | void scsi_sysfs_unregister(void) | |
284 | { | |
285 | class_unregister(&sdev_class); | |
286 | bus_unregister(&scsi_bus_type); | |
287 | } | |
288 | ||
289 | /* | |
290 | * sdev_show_function: macro to create an attr function that can be used to | |
291 | * show a non-bit field. | |
292 | */ | |
293 | #define sdev_show_function(field, format_string) \ | |
294 | static ssize_t \ | |
10523b3b | 295 | sdev_show_##field (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
296 | { \ |
297 | struct scsi_device *sdev; \ | |
298 | sdev = to_scsi_device(dev); \ | |
299 | return snprintf (buf, 20, format_string, sdev->field); \ | |
300 | } \ | |
301 | ||
302 | /* | |
303 | * sdev_rd_attr: macro to create a function and attribute variable for a | |
304 | * read only field. | |
305 | */ | |
306 | #define sdev_rd_attr(field, format_string) \ | |
307 | sdev_show_function(field, format_string) \ | |
308 | static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); | |
309 | ||
310 | ||
311 | /* | |
312 | * sdev_rd_attr: create a function and attribute variable for a | |
313 | * read/write field. | |
314 | */ | |
315 | #define sdev_rw_attr(field, format_string) \ | |
316 | sdev_show_function(field, format_string) \ | |
317 | \ | |
318 | static ssize_t \ | |
10523b3b | 319 | sdev_store_##field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \ |
1da177e4 LT |
320 | { \ |
321 | struct scsi_device *sdev; \ | |
322 | sdev = to_scsi_device(dev); \ | |
323 | snscanf (buf, 20, format_string, &sdev->field); \ | |
324 | return count; \ | |
325 | } \ | |
326 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
327 | ||
328 | /* Currently we don't export bit fields, but we might in future, | |
329 | * so leave this code in */ | |
330 | #if 0 | |
331 | /* | |
332 | * sdev_rd_attr: create a function and attribute variable for a | |
333 | * read/write bit field. | |
334 | */ | |
335 | #define sdev_rw_attr_bit(field) \ | |
336 | sdev_show_function(field, "%d\n") \ | |
337 | \ | |
338 | static ssize_t \ | |
10523b3b | 339 | sdev_store_##field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \ |
1da177e4 LT |
340 | { \ |
341 | int ret; \ | |
342 | struct scsi_device *sdev; \ | |
343 | ret = scsi_sdev_check_buf_bit(buf); \ | |
344 | if (ret >= 0) { \ | |
345 | sdev = to_scsi_device(dev); \ | |
346 | sdev->field = ret; \ | |
347 | ret = count; \ | |
348 | } \ | |
349 | return ret; \ | |
350 | } \ | |
351 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
352 | ||
353 | /* | |
354 | * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", | |
355 | * else return -EINVAL. | |
356 | */ | |
357 | static int scsi_sdev_check_buf_bit(const char *buf) | |
358 | { | |
359 | if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { | |
360 | if (buf[0] == '1') | |
361 | return 1; | |
362 | else if (buf[0] == '0') | |
363 | return 0; | |
364 | else | |
365 | return -EINVAL; | |
366 | } else | |
367 | return -EINVAL; | |
368 | } | |
369 | #endif | |
370 | /* | |
371 | * Create the actual show/store functions and data structures. | |
372 | */ | |
373 | sdev_rd_attr (device_blocked, "%d\n"); | |
374 | sdev_rd_attr (queue_depth, "%d\n"); | |
375 | sdev_rd_attr (type, "%d\n"); | |
376 | sdev_rd_attr (scsi_level, "%d\n"); | |
377 | sdev_rd_attr (vendor, "%.8s\n"); | |
378 | sdev_rd_attr (model, "%.16s\n"); | |
379 | sdev_rd_attr (rev, "%.4s\n"); | |
380 | ||
381 | static ssize_t | |
10523b3b | 382 | sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
383 | { |
384 | struct scsi_device *sdev; | |
385 | sdev = to_scsi_device(dev); | |
386 | return snprintf (buf, 20, "%d\n", sdev->timeout / HZ); | |
387 | } | |
388 | ||
389 | static ssize_t | |
10523b3b | 390 | sdev_store_timeout (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
391 | { |
392 | struct scsi_device *sdev; | |
393 | int timeout; | |
394 | sdev = to_scsi_device(dev); | |
395 | sscanf (buf, "%d\n", &timeout); | |
396 | sdev->timeout = timeout * HZ; | |
397 | return count; | |
398 | } | |
399 | static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); | |
400 | ||
401 | static ssize_t | |
10523b3b | 402 | store_rescan_field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
403 | { |
404 | scsi_rescan_device(dev); | |
405 | return count; | |
406 | } | |
407 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); | |
408 | ||
10523b3b | 409 | static ssize_t sdev_store_delete(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
410 | size_t count) |
411 | { | |
412 | scsi_remove_device(to_scsi_device(dev)); | |
413 | return count; | |
414 | }; | |
415 | static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); | |
416 | ||
417 | static ssize_t | |
10523b3b | 418 | store_state_field(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
419 | { |
420 | int i; | |
421 | struct scsi_device *sdev = to_scsi_device(dev); | |
422 | enum scsi_device_state state = 0; | |
423 | ||
424 | for (i = 0; i < sizeof(sdev_states)/sizeof(sdev_states[0]); i++) { | |
425 | const int len = strlen(sdev_states[i].name); | |
426 | if (strncmp(sdev_states[i].name, buf, len) == 0 && | |
427 | buf[len] == '\n') { | |
428 | state = sdev_states[i].value; | |
429 | break; | |
430 | } | |
431 | } | |
432 | if (!state) | |
433 | return -EINVAL; | |
434 | ||
435 | if (scsi_device_set_state(sdev, state)) | |
436 | return -EINVAL; | |
437 | return count; | |
438 | } | |
439 | ||
440 | static ssize_t | |
10523b3b | 441 | show_state_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
442 | { |
443 | struct scsi_device *sdev = to_scsi_device(dev); | |
444 | const char *name = scsi_device_state_name(sdev->sdev_state); | |
445 | ||
446 | if (!name) | |
447 | return -EINVAL; | |
448 | ||
449 | return snprintf(buf, 20, "%s\n", name); | |
450 | } | |
451 | ||
452 | static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); | |
453 | ||
454 | static ssize_t | |
10523b3b | 455 | show_queue_type_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
456 | { |
457 | struct scsi_device *sdev = to_scsi_device(dev); | |
458 | const char *name = "none"; | |
459 | ||
460 | if (sdev->ordered_tags) | |
461 | name = "ordered"; | |
462 | else if (sdev->simple_tags) | |
463 | name = "simple"; | |
464 | ||
465 | return snprintf(buf, 20, "%s\n", name); | |
466 | } | |
467 | ||
468 | static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL); | |
469 | ||
470 | static ssize_t | |
10523b3b | 471 | show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
472 | { |
473 | return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); | |
474 | } | |
475 | ||
476 | static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); | |
477 | ||
478 | #define show_sdev_iostat(field) \ | |
479 | static ssize_t \ | |
10523b3b | 480 | show_iostat_##field(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
481 | { \ |
482 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
483 | unsigned long long count = atomic_read(&sdev->field); \ | |
484 | return snprintf(buf, 20, "0x%llx\n", count); \ | |
485 | } \ | |
486 | static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) | |
487 | ||
488 | show_sdev_iostat(iorequest_cnt); | |
489 | show_sdev_iostat(iodone_cnt); | |
490 | show_sdev_iostat(ioerr_cnt); | |
491 | ||
492 | ||
493 | /* Default template for device attributes. May NOT be modified */ | |
494 | static struct device_attribute *scsi_sysfs_sdev_attrs[] = { | |
495 | &dev_attr_device_blocked, | |
496 | &dev_attr_queue_depth, | |
497 | &dev_attr_queue_type, | |
498 | &dev_attr_type, | |
499 | &dev_attr_scsi_level, | |
500 | &dev_attr_vendor, | |
501 | &dev_attr_model, | |
502 | &dev_attr_rev, | |
503 | &dev_attr_rescan, | |
504 | &dev_attr_delete, | |
505 | &dev_attr_state, | |
506 | &dev_attr_timeout, | |
507 | &dev_attr_iocounterbits, | |
508 | &dev_attr_iorequest_cnt, | |
509 | &dev_attr_iodone_cnt, | |
510 | &dev_attr_ioerr_cnt, | |
511 | NULL | |
512 | }; | |
513 | ||
10523b3b | 514 | static ssize_t sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
515 | size_t count) |
516 | { | |
517 | int depth, retval; | |
518 | struct scsi_device *sdev = to_scsi_device(dev); | |
519 | struct scsi_host_template *sht = sdev->host->hostt; | |
520 | ||
521 | if (!sht->change_queue_depth) | |
522 | return -EINVAL; | |
523 | ||
524 | depth = simple_strtoul(buf, NULL, 0); | |
525 | ||
526 | if (depth < 1) | |
527 | return -EINVAL; | |
528 | ||
529 | retval = sht->change_queue_depth(sdev, depth); | |
530 | if (retval < 0) | |
531 | return retval; | |
532 | ||
533 | return count; | |
534 | } | |
535 | ||
536 | static struct device_attribute sdev_attr_queue_depth_rw = | |
537 | __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, | |
538 | sdev_store_queue_depth_rw); | |
539 | ||
10523b3b | 540 | static ssize_t sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
541 | size_t count) |
542 | { | |
543 | struct scsi_device *sdev = to_scsi_device(dev); | |
544 | struct scsi_host_template *sht = sdev->host->hostt; | |
545 | int tag_type = 0, retval; | |
546 | int prev_tag_type = scsi_get_tag_type(sdev); | |
547 | ||
548 | if (!sdev->tagged_supported || !sht->change_queue_type) | |
549 | return -EINVAL; | |
550 | ||
551 | if (strncmp(buf, "ordered", 7) == 0) | |
552 | tag_type = MSG_ORDERED_TAG; | |
553 | else if (strncmp(buf, "simple", 6) == 0) | |
554 | tag_type = MSG_SIMPLE_TAG; | |
555 | else if (strncmp(buf, "none", 4) != 0) | |
556 | return -EINVAL; | |
557 | ||
558 | if (tag_type == prev_tag_type) | |
559 | return count; | |
560 | ||
561 | retval = sht->change_queue_type(sdev, tag_type); | |
562 | if (retval < 0) | |
563 | return retval; | |
564 | ||
565 | return count; | |
566 | } | |
567 | ||
568 | static struct device_attribute sdev_attr_queue_type_rw = | |
569 | __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, | |
570 | sdev_store_queue_type_rw); | |
571 | ||
572 | static struct device_attribute *attr_changed_internally( | |
573 | struct Scsi_Host *shost, | |
574 | struct device_attribute * attr) | |
575 | { | |
576 | if (!strcmp("queue_depth", attr->attr.name) | |
577 | && shost->hostt->change_queue_depth) | |
578 | return &sdev_attr_queue_depth_rw; | |
579 | else if (!strcmp("queue_type", attr->attr.name) | |
580 | && shost->hostt->change_queue_type) | |
581 | return &sdev_attr_queue_type_rw; | |
582 | return attr; | |
583 | } | |
584 | ||
585 | ||
586 | static struct device_attribute *attr_overridden( | |
587 | struct device_attribute **attrs, | |
588 | struct device_attribute *attr) | |
589 | { | |
590 | int i; | |
591 | ||
592 | if (!attrs) | |
593 | return NULL; | |
594 | for (i = 0; attrs[i]; i++) | |
595 | if (!strcmp(attrs[i]->attr.name, attr->attr.name)) | |
596 | return attrs[i]; | |
597 | return NULL; | |
598 | } | |
599 | ||
600 | static int attr_add(struct device *dev, struct device_attribute *attr) | |
601 | { | |
602 | struct device_attribute *base_attr; | |
603 | ||
604 | /* | |
605 | * Spare the caller from having to copy things it's not interested in. | |
606 | */ | |
607 | base_attr = attr_overridden(scsi_sysfs_sdev_attrs, attr); | |
608 | if (base_attr) { | |
609 | /* extend permissions */ | |
610 | attr->attr.mode |= base_attr->attr.mode; | |
611 | ||
612 | /* override null show/store with default */ | |
613 | if (!attr->show) | |
614 | attr->show = base_attr->show; | |
615 | if (!attr->store) | |
616 | attr->store = base_attr->store; | |
617 | } | |
618 | ||
619 | return device_create_file(dev, attr); | |
620 | } | |
621 | ||
622 | /** | |
623 | * scsi_sysfs_add_sdev - add scsi device to sysfs | |
624 | * @sdev: scsi_device to add | |
625 | * | |
626 | * Return value: | |
627 | * 0 on Success / non-zero on Failure | |
628 | **/ | |
629 | int scsi_sysfs_add_sdev(struct scsi_device *sdev) | |
630 | { | |
631 | int error, i; | |
632 | ||
633 | if ((error = scsi_device_set_state(sdev, SDEV_RUNNING)) != 0) | |
634 | return error; | |
635 | ||
636 | error = device_add(&sdev->sdev_gendev); | |
637 | if (error) { | |
638 | put_device(sdev->sdev_gendev.parent); | |
639 | printk(KERN_INFO "error 1\n"); | |
640 | return error; | |
641 | } | |
642 | error = class_device_add(&sdev->sdev_classdev); | |
643 | if (error) { | |
644 | printk(KERN_INFO "error 2\n"); | |
645 | goto clean_device; | |
646 | } | |
647 | ||
648 | /* take a reference for the sdev_classdev; this is | |
649 | * released by the sdev_class .release */ | |
650 | get_device(&sdev->sdev_gendev); | |
651 | if (sdev->host->hostt->sdev_attrs) { | |
652 | for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { | |
653 | error = attr_add(&sdev->sdev_gendev, | |
654 | sdev->host->hostt->sdev_attrs[i]); | |
655 | if (error) { | |
903f4fed | 656 | __scsi_remove_device(sdev); |
1da177e4 LT |
657 | goto out; |
658 | } | |
659 | } | |
660 | } | |
661 | ||
662 | for (i = 0; scsi_sysfs_sdev_attrs[i]; i++) { | |
663 | if (!attr_overridden(sdev->host->hostt->sdev_attrs, | |
664 | scsi_sysfs_sdev_attrs[i])) { | |
665 | struct device_attribute * attr = | |
666 | attr_changed_internally(sdev->host, | |
667 | scsi_sysfs_sdev_attrs[i]); | |
668 | error = device_create_file(&sdev->sdev_gendev, attr); | |
669 | if (error) { | |
903f4fed | 670 | __scsi_remove_device(sdev); |
1da177e4 LT |
671 | goto out; |
672 | } | |
673 | } | |
674 | } | |
675 | ||
676 | transport_add_device(&sdev->sdev_gendev); | |
677 | out: | |
678 | return error; | |
679 | ||
680 | clean_device: | |
681 | scsi_device_set_state(sdev, SDEV_CANCEL); | |
682 | ||
683 | device_del(&sdev->sdev_gendev); | |
684 | transport_destroy_device(&sdev->sdev_gendev); | |
685 | put_device(&sdev->sdev_gendev); | |
686 | ||
687 | return error; | |
688 | } | |
689 | ||
903f4fed | 690 | void __scsi_remove_device(struct scsi_device *sdev) |
1da177e4 | 691 | { |
1da177e4 | 692 | if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0) |
903f4fed | 693 | return; |
1da177e4 LT |
694 | |
695 | class_device_unregister(&sdev->sdev_classdev); | |
696 | device_del(&sdev->sdev_gendev); | |
697 | scsi_device_set_state(sdev, SDEV_DEL); | |
698 | if (sdev->host->hostt->slave_destroy) | |
699 | sdev->host->hostt->slave_destroy(sdev); | |
700 | transport_unregister_device(&sdev->sdev_gendev); | |
701 | put_device(&sdev->sdev_gendev); | |
903f4fed AS |
702 | } |
703 | ||
704 | /** | |
705 | * scsi_remove_device - unregister a device from the scsi bus | |
706 | * @sdev: scsi_device to unregister | |
707 | **/ | |
708 | void scsi_remove_device(struct scsi_device *sdev) | |
709 | { | |
54195002 AS |
710 | struct Scsi_Host *shost = sdev->host; |
711 | ||
712 | down(&shost->scan_mutex); | |
903f4fed | 713 | __scsi_remove_device(sdev); |
54195002 | 714 | up(&shost->scan_mutex); |
1da177e4 LT |
715 | } |
716 | EXPORT_SYMBOL(scsi_remove_device); | |
717 | ||
718 | void __scsi_remove_target(struct scsi_target *starget) | |
719 | { | |
720 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
721 | unsigned long flags; | |
722 | struct scsi_device *sdev, *tmp; | |
723 | ||
724 | spin_lock_irqsave(shost->host_lock, flags); | |
725 | starget->reap_ref++; | |
726 | list_for_each_entry_safe(sdev, tmp, &shost->__devices, siblings) { | |
727 | if (sdev->channel != starget->channel || | |
728 | sdev->id != starget->id) | |
729 | continue; | |
730 | spin_unlock_irqrestore(shost->host_lock, flags); | |
731 | scsi_remove_device(sdev); | |
732 | spin_lock_irqsave(shost->host_lock, flags); | |
733 | } | |
734 | spin_unlock_irqrestore(shost->host_lock, flags); | |
735 | scsi_target_reap(starget); | |
736 | } | |
737 | ||
20b1e674 | 738 | static int __remove_child (struct device * dev, void * data) |
739 | { | |
740 | if (scsi_is_target_device(dev)) | |
741 | __scsi_remove_target(to_scsi_target(dev)); | |
742 | return 0; | |
743 | } | |
744 | ||
1da177e4 LT |
745 | /** |
746 | * scsi_remove_target - try to remove a target and all its devices | |
747 | * @dev: generic starget or parent of generic stargets to be removed | |
748 | * | |
749 | * Note: This is slightly racy. It is possible that if the user | |
750 | * requests the addition of another device then the target won't be | |
751 | * removed. | |
752 | */ | |
753 | void scsi_remove_target(struct device *dev) | |
754 | { | |
20b1e674 | 755 | struct device *rdev; |
1da177e4 LT |
756 | |
757 | if (scsi_is_target_device(dev)) { | |
758 | __scsi_remove_target(to_scsi_target(dev)); | |
759 | return; | |
760 | } | |
761 | ||
762 | rdev = get_device(dev); | |
20b1e674 | 763 | device_for_each_child(dev, NULL, __remove_child); |
1da177e4 LT |
764 | put_device(rdev); |
765 | } | |
766 | EXPORT_SYMBOL(scsi_remove_target); | |
767 | ||
768 | int scsi_register_driver(struct device_driver *drv) | |
769 | { | |
770 | drv->bus = &scsi_bus_type; | |
771 | ||
772 | return driver_register(drv); | |
773 | } | |
774 | EXPORT_SYMBOL(scsi_register_driver); | |
775 | ||
776 | int scsi_register_interface(struct class_interface *intf) | |
777 | { | |
778 | intf->class = &sdev_class; | |
779 | ||
780 | return class_interface_register(intf); | |
781 | } | |
782 | EXPORT_SYMBOL(scsi_register_interface); | |
783 | ||
784 | ||
785 | static struct class_device_attribute *class_attr_overridden( | |
786 | struct class_device_attribute **attrs, | |
787 | struct class_device_attribute *attr) | |
788 | { | |
789 | int i; | |
790 | ||
791 | if (!attrs) | |
792 | return NULL; | |
793 | for (i = 0; attrs[i]; i++) | |
794 | if (!strcmp(attrs[i]->attr.name, attr->attr.name)) | |
795 | return attrs[i]; | |
796 | return NULL; | |
797 | } | |
798 | ||
799 | static int class_attr_add(struct class_device *classdev, | |
800 | struct class_device_attribute *attr) | |
801 | { | |
802 | struct class_device_attribute *base_attr; | |
803 | ||
804 | /* | |
805 | * Spare the caller from having to copy things it's not interested in. | |
806 | */ | |
807 | base_attr = class_attr_overridden(scsi_sysfs_shost_attrs, attr); | |
808 | if (base_attr) { | |
809 | /* extend permissions */ | |
810 | attr->attr.mode |= base_attr->attr.mode; | |
811 | ||
812 | /* override null show/store with default */ | |
813 | if (!attr->show) | |
814 | attr->show = base_attr->show; | |
815 | if (!attr->store) | |
816 | attr->store = base_attr->store; | |
817 | } | |
818 | ||
819 | return class_device_create_file(classdev, attr); | |
820 | } | |
821 | ||
822 | /** | |
823 | * scsi_sysfs_add_host - add scsi host to subsystem | |
824 | * @shost: scsi host struct to add to subsystem | |
825 | * @dev: parent struct device pointer | |
826 | **/ | |
827 | int scsi_sysfs_add_host(struct Scsi_Host *shost) | |
828 | { | |
829 | int error, i; | |
830 | ||
831 | if (shost->hostt->shost_attrs) { | |
832 | for (i = 0; shost->hostt->shost_attrs[i]; i++) { | |
833 | error = class_attr_add(&shost->shost_classdev, | |
834 | shost->hostt->shost_attrs[i]); | |
835 | if (error) | |
836 | return error; | |
837 | } | |
838 | } | |
839 | ||
840 | for (i = 0; scsi_sysfs_shost_attrs[i]; i++) { | |
841 | if (!class_attr_overridden(shost->hostt->shost_attrs, | |
842 | scsi_sysfs_shost_attrs[i])) { | |
843 | error = class_device_create_file(&shost->shost_classdev, | |
844 | scsi_sysfs_shost_attrs[i]); | |
845 | if (error) | |
846 | return error; | |
847 | } | |
848 | } | |
849 | ||
850 | transport_register_device(&shost->shost_gendev); | |
851 | return 0; | |
852 | } | |
853 | ||
854 | void scsi_sysfs_device_initialize(struct scsi_device *sdev) | |
855 | { | |
856 | unsigned long flags; | |
857 | struct Scsi_Host *shost = sdev->host; | |
858 | struct scsi_target *starget = sdev->sdev_target; | |
859 | ||
860 | device_initialize(&sdev->sdev_gendev); | |
861 | sdev->sdev_gendev.bus = &scsi_bus_type; | |
862 | sdev->sdev_gendev.release = scsi_device_dev_release; | |
863 | sprintf(sdev->sdev_gendev.bus_id,"%d:%d:%d:%d", | |
864 | sdev->host->host_no, sdev->channel, sdev->id, | |
865 | sdev->lun); | |
866 | ||
867 | class_device_initialize(&sdev->sdev_classdev); | |
868 | sdev->sdev_classdev.dev = &sdev->sdev_gendev; | |
869 | sdev->sdev_classdev.class = &sdev_class; | |
870 | snprintf(sdev->sdev_classdev.class_id, BUS_ID_SIZE, | |
871 | "%d:%d:%d:%d", sdev->host->host_no, | |
872 | sdev->channel, sdev->id, sdev->lun); | |
873 | sdev->scsi_level = SCSI_2; | |
874 | transport_setup_device(&sdev->sdev_gendev); | |
875 | spin_lock_irqsave(shost->host_lock, flags); | |
876 | list_add_tail(&sdev->same_target_siblings, &starget->devices); | |
877 | list_add_tail(&sdev->siblings, &shost->__devices); | |
878 | spin_unlock_irqrestore(shost->host_lock, flags); | |
879 | } | |
880 | ||
881 | int scsi_is_sdev_device(const struct device *dev) | |
882 | { | |
883 | return dev->release == scsi_device_dev_release; | |
884 | } | |
885 | EXPORT_SYMBOL(scsi_is_sdev_device); | |
886 | ||
887 | /* A blank transport template that is used in drivers that don't | |
888 | * yet implement Transport Attributes */ | |
889 | struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |