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; | |
109 | res = scsi_scan_host_selected(shost, channel, id, lun, 1); | |
110 | return res; | |
111 | } | |
112 | ||
113 | /* | |
114 | * shost_show_function: macro to create an attr function that can be used to | |
115 | * show a non-bit field. | |
116 | */ | |
117 | #define shost_show_function(name, field, format_string) \ | |
118 | static ssize_t \ | |
119 | show_##name (struct class_device *class_dev, char *buf) \ | |
120 | { \ | |
121 | struct Scsi_Host *shost = class_to_shost(class_dev); \ | |
122 | return snprintf (buf, 20, format_string, shost->field); \ | |
123 | } | |
124 | ||
125 | /* | |
126 | * shost_rd_attr: macro to create a function and attribute variable for a | |
127 | * read only field. | |
128 | */ | |
129 | #define shost_rd_attr2(name, field, format_string) \ | |
130 | shost_show_function(name, field, format_string) \ | |
131 | static CLASS_DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); | |
132 | ||
133 | #define shost_rd_attr(field, format_string) \ | |
134 | shost_rd_attr2(field, field, format_string) | |
135 | ||
136 | /* | |
137 | * Create the actual show/store functions and data structures. | |
138 | */ | |
139 | ||
140 | static ssize_t store_scan(struct class_device *class_dev, const char *buf, | |
141 | size_t count) | |
142 | { | |
143 | struct Scsi_Host *shost = class_to_shost(class_dev); | |
144 | int res; | |
145 | ||
146 | res = scsi_scan(shost, buf); | |
147 | if (res == 0) | |
148 | res = count; | |
149 | return res; | |
150 | }; | |
151 | static CLASS_DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); | |
152 | ||
d3301874 MA |
153 | static ssize_t |
154 | store_shost_state(struct class_device *class_dev, const char *buf, size_t count) | |
155 | { | |
156 | int i; | |
157 | struct Scsi_Host *shost = class_to_shost(class_dev); | |
158 | enum scsi_host_state state = 0; | |
159 | ||
160 | for (i = 0; i < sizeof(shost_states)/sizeof(shost_states[0]); i++) { | |
161 | const int len = strlen(shost_states[i].name); | |
162 | if (strncmp(shost_states[i].name, buf, len) == 0 && | |
163 | buf[len] == '\n') { | |
164 | state = shost_states[i].value; | |
165 | break; | |
166 | } | |
167 | } | |
168 | if (!state) | |
169 | return -EINVAL; | |
170 | ||
171 | if (scsi_host_set_state(shost, state)) | |
172 | return -EINVAL; | |
173 | return count; | |
174 | } | |
175 | ||
176 | static ssize_t | |
177 | show_shost_state(struct class_device *class_dev, char *buf) | |
178 | { | |
179 | struct Scsi_Host *shost = class_to_shost(class_dev); | |
180 | const char *name = scsi_host_state_name(shost->shost_state); | |
181 | ||
182 | if (!name) | |
183 | return -EINVAL; | |
184 | ||
185 | return snprintf(buf, 20, "%s\n", name); | |
186 | } | |
187 | ||
188 | static CLASS_DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state); | |
189 | ||
1da177e4 LT |
190 | shost_rd_attr(unique_id, "%u\n"); |
191 | shost_rd_attr(host_busy, "%hu\n"); | |
192 | shost_rd_attr(cmd_per_lun, "%hd\n"); | |
193 | shost_rd_attr(sg_tablesize, "%hu\n"); | |
194 | shost_rd_attr(unchecked_isa_dma, "%d\n"); | |
195 | shost_rd_attr2(proc_name, hostt->proc_name, "%s\n"); | |
196 | ||
197 | static struct class_device_attribute *scsi_sysfs_shost_attrs[] = { | |
198 | &class_device_attr_unique_id, | |
199 | &class_device_attr_host_busy, | |
200 | &class_device_attr_cmd_per_lun, | |
201 | &class_device_attr_sg_tablesize, | |
202 | &class_device_attr_unchecked_isa_dma, | |
203 | &class_device_attr_proc_name, | |
204 | &class_device_attr_scan, | |
d3301874 | 205 | &class_device_attr_state, |
1da177e4 LT |
206 | NULL |
207 | }; | |
208 | ||
209 | static void scsi_device_cls_release(struct class_device *class_dev) | |
210 | { | |
211 | struct scsi_device *sdev; | |
212 | ||
213 | sdev = class_to_sdev(class_dev); | |
214 | put_device(&sdev->sdev_gendev); | |
215 | } | |
216 | ||
52c1da39 | 217 | static void scsi_device_dev_release(struct device *dev) |
1da177e4 LT |
218 | { |
219 | struct scsi_device *sdev; | |
220 | struct device *parent; | |
221 | struct scsi_target *starget; | |
222 | unsigned long flags; | |
223 | ||
224 | parent = dev->parent; | |
225 | sdev = to_scsi_device(dev); | |
226 | starget = to_scsi_target(parent); | |
227 | ||
228 | spin_lock_irqsave(sdev->host->host_lock, flags); | |
229 | starget->reap_ref++; | |
230 | list_del(&sdev->siblings); | |
231 | list_del(&sdev->same_target_siblings); | |
232 | list_del(&sdev->starved_entry); | |
233 | spin_unlock_irqrestore(sdev->host->host_lock, flags); | |
234 | ||
235 | if (sdev->request_queue) { | |
236 | sdev->request_queue->queuedata = NULL; | |
237 | scsi_free_queue(sdev->request_queue); | |
c2a9331c | 238 | /* temporary expedient, try to catch use of queue lock |
239 | * after free of sdev */ | |
240 | sdev->request_queue = NULL; | |
1da177e4 LT |
241 | } |
242 | ||
243 | scsi_target_reap(scsi_target(sdev)); | |
244 | ||
245 | kfree(sdev->inquiry); | |
246 | kfree(sdev); | |
247 | ||
248 | if (parent) | |
249 | put_device(parent); | |
250 | } | |
251 | ||
52c1da39 | 252 | static struct class sdev_class = { |
1da177e4 LT |
253 | .name = "scsi_device", |
254 | .release = scsi_device_cls_release, | |
255 | }; | |
256 | ||
257 | /* all probing is done in the individual ->probe routines */ | |
258 | static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) | |
259 | { | |
260 | struct scsi_device *sdp = to_scsi_device(dev); | |
261 | if (sdp->no_uld_attach) | |
262 | return 0; | |
263 | return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; | |
264 | } | |
265 | ||
9b847548 JA |
266 | static int scsi_bus_suspend(struct device * dev, pm_message_t state) |
267 | { | |
268 | struct scsi_device *sdev = to_scsi_device(dev); | |
269 | struct scsi_host_template *sht = sdev->host->hostt; | |
270 | int err; | |
271 | ||
272 | err = scsi_device_quiesce(sdev); | |
273 | if (err) | |
274 | return err; | |
275 | ||
276 | if (sht->suspend) | |
277 | err = sht->suspend(sdev); | |
278 | ||
279 | return err; | |
280 | } | |
281 | ||
282 | static int scsi_bus_resume(struct device * dev) | |
283 | { | |
284 | struct scsi_device *sdev = to_scsi_device(dev); | |
285 | struct scsi_host_template *sht = sdev->host->hostt; | |
286 | int err = 0; | |
287 | ||
288 | if (sht->resume) | |
289 | err = sht->resume(sdev); | |
290 | ||
291 | scsi_device_resume(sdev); | |
292 | return err; | |
293 | } | |
294 | ||
1da177e4 LT |
295 | struct bus_type scsi_bus_type = { |
296 | .name = "scsi", | |
297 | .match = scsi_bus_match, | |
9b847548 JA |
298 | .suspend = scsi_bus_suspend, |
299 | .resume = scsi_bus_resume, | |
1da177e4 LT |
300 | }; |
301 | ||
302 | int scsi_sysfs_register(void) | |
303 | { | |
304 | int error; | |
305 | ||
306 | error = bus_register(&scsi_bus_type); | |
307 | if (!error) { | |
308 | error = class_register(&sdev_class); | |
309 | if (error) | |
310 | bus_unregister(&scsi_bus_type); | |
311 | } | |
312 | ||
313 | return error; | |
314 | } | |
315 | ||
316 | void scsi_sysfs_unregister(void) | |
317 | { | |
318 | class_unregister(&sdev_class); | |
319 | bus_unregister(&scsi_bus_type); | |
320 | } | |
321 | ||
322 | /* | |
323 | * sdev_show_function: macro to create an attr function that can be used to | |
324 | * show a non-bit field. | |
325 | */ | |
326 | #define sdev_show_function(field, format_string) \ | |
327 | static ssize_t \ | |
10523b3b | 328 | sdev_show_##field (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
329 | { \ |
330 | struct scsi_device *sdev; \ | |
331 | sdev = to_scsi_device(dev); \ | |
332 | return snprintf (buf, 20, format_string, sdev->field); \ | |
333 | } \ | |
334 | ||
335 | /* | |
336 | * sdev_rd_attr: macro to create a function and attribute variable for a | |
337 | * read only field. | |
338 | */ | |
339 | #define sdev_rd_attr(field, format_string) \ | |
340 | sdev_show_function(field, format_string) \ | |
341 | static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); | |
342 | ||
343 | ||
344 | /* | |
345 | * sdev_rd_attr: create a function and attribute variable for a | |
346 | * read/write field. | |
347 | */ | |
348 | #define sdev_rw_attr(field, format_string) \ | |
349 | sdev_show_function(field, format_string) \ | |
350 | \ | |
351 | static ssize_t \ | |
10523b3b | 352 | sdev_store_##field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \ |
1da177e4 LT |
353 | { \ |
354 | struct scsi_device *sdev; \ | |
355 | sdev = to_scsi_device(dev); \ | |
356 | snscanf (buf, 20, format_string, &sdev->field); \ | |
357 | return count; \ | |
358 | } \ | |
359 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
360 | ||
361 | /* Currently we don't export bit fields, but we might in future, | |
362 | * so leave this code in */ | |
363 | #if 0 | |
364 | /* | |
365 | * sdev_rd_attr: create a function and attribute variable for a | |
366 | * read/write bit field. | |
367 | */ | |
368 | #define sdev_rw_attr_bit(field) \ | |
369 | sdev_show_function(field, "%d\n") \ | |
370 | \ | |
371 | static ssize_t \ | |
10523b3b | 372 | sdev_store_##field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \ |
1da177e4 LT |
373 | { \ |
374 | int ret; \ | |
375 | struct scsi_device *sdev; \ | |
376 | ret = scsi_sdev_check_buf_bit(buf); \ | |
377 | if (ret >= 0) { \ | |
378 | sdev = to_scsi_device(dev); \ | |
379 | sdev->field = ret; \ | |
380 | ret = count; \ | |
381 | } \ | |
382 | return ret; \ | |
383 | } \ | |
384 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
385 | ||
386 | /* | |
387 | * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", | |
388 | * else return -EINVAL. | |
389 | */ | |
390 | static int scsi_sdev_check_buf_bit(const char *buf) | |
391 | { | |
392 | if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { | |
393 | if (buf[0] == '1') | |
394 | return 1; | |
395 | else if (buf[0] == '0') | |
396 | return 0; | |
397 | else | |
398 | return -EINVAL; | |
399 | } else | |
400 | return -EINVAL; | |
401 | } | |
402 | #endif | |
403 | /* | |
404 | * Create the actual show/store functions and data structures. | |
405 | */ | |
406 | sdev_rd_attr (device_blocked, "%d\n"); | |
407 | sdev_rd_attr (queue_depth, "%d\n"); | |
408 | sdev_rd_attr (type, "%d\n"); | |
409 | sdev_rd_attr (scsi_level, "%d\n"); | |
410 | sdev_rd_attr (vendor, "%.8s\n"); | |
411 | sdev_rd_attr (model, "%.16s\n"); | |
412 | sdev_rd_attr (rev, "%.4s\n"); | |
413 | ||
414 | static ssize_t | |
10523b3b | 415 | sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
416 | { |
417 | struct scsi_device *sdev; | |
418 | sdev = to_scsi_device(dev); | |
419 | return snprintf (buf, 20, "%d\n", sdev->timeout / HZ); | |
420 | } | |
421 | ||
422 | static ssize_t | |
10523b3b | 423 | sdev_store_timeout (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
424 | { |
425 | struct scsi_device *sdev; | |
426 | int timeout; | |
427 | sdev = to_scsi_device(dev); | |
428 | sscanf (buf, "%d\n", &timeout); | |
429 | sdev->timeout = timeout * HZ; | |
430 | return count; | |
431 | } | |
432 | static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); | |
433 | ||
434 | static ssize_t | |
10523b3b | 435 | store_rescan_field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
436 | { |
437 | scsi_rescan_device(dev); | |
438 | return count; | |
439 | } | |
440 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); | |
441 | ||
10523b3b | 442 | static ssize_t sdev_store_delete(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
443 | size_t count) |
444 | { | |
445 | scsi_remove_device(to_scsi_device(dev)); | |
446 | return count; | |
447 | }; | |
448 | static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); | |
449 | ||
450 | static ssize_t | |
10523b3b | 451 | store_state_field(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
452 | { |
453 | int i; | |
454 | struct scsi_device *sdev = to_scsi_device(dev); | |
455 | enum scsi_device_state state = 0; | |
456 | ||
457 | for (i = 0; i < sizeof(sdev_states)/sizeof(sdev_states[0]); i++) { | |
458 | const int len = strlen(sdev_states[i].name); | |
459 | if (strncmp(sdev_states[i].name, buf, len) == 0 && | |
460 | buf[len] == '\n') { | |
461 | state = sdev_states[i].value; | |
462 | break; | |
463 | } | |
464 | } | |
465 | if (!state) | |
466 | return -EINVAL; | |
467 | ||
468 | if (scsi_device_set_state(sdev, state)) | |
469 | return -EINVAL; | |
470 | return count; | |
471 | } | |
472 | ||
473 | static ssize_t | |
10523b3b | 474 | show_state_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
475 | { |
476 | struct scsi_device *sdev = to_scsi_device(dev); | |
477 | const char *name = scsi_device_state_name(sdev->sdev_state); | |
478 | ||
479 | if (!name) | |
480 | return -EINVAL; | |
481 | ||
482 | return snprintf(buf, 20, "%s\n", name); | |
483 | } | |
484 | ||
485 | static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); | |
486 | ||
487 | static ssize_t | |
10523b3b | 488 | show_queue_type_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
489 | { |
490 | struct scsi_device *sdev = to_scsi_device(dev); | |
491 | const char *name = "none"; | |
492 | ||
493 | if (sdev->ordered_tags) | |
494 | name = "ordered"; | |
495 | else if (sdev->simple_tags) | |
496 | name = "simple"; | |
497 | ||
498 | return snprintf(buf, 20, "%s\n", name); | |
499 | } | |
500 | ||
501 | static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL); | |
502 | ||
503 | static ssize_t | |
10523b3b | 504 | show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
505 | { |
506 | return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); | |
507 | } | |
508 | ||
509 | static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); | |
510 | ||
511 | #define show_sdev_iostat(field) \ | |
512 | static ssize_t \ | |
10523b3b | 513 | show_iostat_##field(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
514 | { \ |
515 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
516 | unsigned long long count = atomic_read(&sdev->field); \ | |
517 | return snprintf(buf, 20, "0x%llx\n", count); \ | |
518 | } \ | |
519 | static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) | |
520 | ||
521 | show_sdev_iostat(iorequest_cnt); | |
522 | show_sdev_iostat(iodone_cnt); | |
523 | show_sdev_iostat(ioerr_cnt); | |
524 | ||
525 | ||
526 | /* Default template for device attributes. May NOT be modified */ | |
527 | static struct device_attribute *scsi_sysfs_sdev_attrs[] = { | |
528 | &dev_attr_device_blocked, | |
529 | &dev_attr_queue_depth, | |
530 | &dev_attr_queue_type, | |
531 | &dev_attr_type, | |
532 | &dev_attr_scsi_level, | |
533 | &dev_attr_vendor, | |
534 | &dev_attr_model, | |
535 | &dev_attr_rev, | |
536 | &dev_attr_rescan, | |
537 | &dev_attr_delete, | |
538 | &dev_attr_state, | |
539 | &dev_attr_timeout, | |
540 | &dev_attr_iocounterbits, | |
541 | &dev_attr_iorequest_cnt, | |
542 | &dev_attr_iodone_cnt, | |
543 | &dev_attr_ioerr_cnt, | |
544 | NULL | |
545 | }; | |
546 | ||
10523b3b | 547 | static ssize_t sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
548 | size_t count) |
549 | { | |
550 | int depth, retval; | |
551 | struct scsi_device *sdev = to_scsi_device(dev); | |
552 | struct scsi_host_template *sht = sdev->host->hostt; | |
553 | ||
554 | if (!sht->change_queue_depth) | |
555 | return -EINVAL; | |
556 | ||
557 | depth = simple_strtoul(buf, NULL, 0); | |
558 | ||
559 | if (depth < 1) | |
560 | return -EINVAL; | |
561 | ||
562 | retval = sht->change_queue_depth(sdev, depth); | |
563 | if (retval < 0) | |
564 | return retval; | |
565 | ||
566 | return count; | |
567 | } | |
568 | ||
569 | static struct device_attribute sdev_attr_queue_depth_rw = | |
570 | __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, | |
571 | sdev_store_queue_depth_rw); | |
572 | ||
10523b3b | 573 | static ssize_t sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
574 | size_t count) |
575 | { | |
576 | struct scsi_device *sdev = to_scsi_device(dev); | |
577 | struct scsi_host_template *sht = sdev->host->hostt; | |
578 | int tag_type = 0, retval; | |
579 | int prev_tag_type = scsi_get_tag_type(sdev); | |
580 | ||
581 | if (!sdev->tagged_supported || !sht->change_queue_type) | |
582 | return -EINVAL; | |
583 | ||
584 | if (strncmp(buf, "ordered", 7) == 0) | |
585 | tag_type = MSG_ORDERED_TAG; | |
586 | else if (strncmp(buf, "simple", 6) == 0) | |
587 | tag_type = MSG_SIMPLE_TAG; | |
588 | else if (strncmp(buf, "none", 4) != 0) | |
589 | return -EINVAL; | |
590 | ||
591 | if (tag_type == prev_tag_type) | |
592 | return count; | |
593 | ||
594 | retval = sht->change_queue_type(sdev, tag_type); | |
595 | if (retval < 0) | |
596 | return retval; | |
597 | ||
598 | return count; | |
599 | } | |
600 | ||
601 | static struct device_attribute sdev_attr_queue_type_rw = | |
602 | __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, | |
603 | sdev_store_queue_type_rw); | |
604 | ||
605 | static struct device_attribute *attr_changed_internally( | |
606 | struct Scsi_Host *shost, | |
607 | struct device_attribute * attr) | |
608 | { | |
609 | if (!strcmp("queue_depth", attr->attr.name) | |
610 | && shost->hostt->change_queue_depth) | |
611 | return &sdev_attr_queue_depth_rw; | |
612 | else if (!strcmp("queue_type", attr->attr.name) | |
613 | && shost->hostt->change_queue_type) | |
614 | return &sdev_attr_queue_type_rw; | |
615 | return attr; | |
616 | } | |
617 | ||
618 | ||
619 | static struct device_attribute *attr_overridden( | |
620 | struct device_attribute **attrs, | |
621 | struct device_attribute *attr) | |
622 | { | |
623 | int i; | |
624 | ||
625 | if (!attrs) | |
626 | return NULL; | |
627 | for (i = 0; attrs[i]; i++) | |
628 | if (!strcmp(attrs[i]->attr.name, attr->attr.name)) | |
629 | return attrs[i]; | |
630 | return NULL; | |
631 | } | |
632 | ||
633 | static int attr_add(struct device *dev, struct device_attribute *attr) | |
634 | { | |
635 | struct device_attribute *base_attr; | |
636 | ||
637 | /* | |
638 | * Spare the caller from having to copy things it's not interested in. | |
639 | */ | |
640 | base_attr = attr_overridden(scsi_sysfs_sdev_attrs, attr); | |
641 | if (base_attr) { | |
642 | /* extend permissions */ | |
643 | attr->attr.mode |= base_attr->attr.mode; | |
644 | ||
645 | /* override null show/store with default */ | |
646 | if (!attr->show) | |
647 | attr->show = base_attr->show; | |
648 | if (!attr->store) | |
649 | attr->store = base_attr->store; | |
650 | } | |
651 | ||
652 | return device_create_file(dev, attr); | |
653 | } | |
654 | ||
655 | /** | |
656 | * scsi_sysfs_add_sdev - add scsi device to sysfs | |
657 | * @sdev: scsi_device to add | |
658 | * | |
659 | * Return value: | |
660 | * 0 on Success / non-zero on Failure | |
661 | **/ | |
662 | int scsi_sysfs_add_sdev(struct scsi_device *sdev) | |
663 | { | |
664 | int error, i; | |
665 | ||
666 | if ((error = scsi_device_set_state(sdev, SDEV_RUNNING)) != 0) | |
667 | return error; | |
668 | ||
669 | error = device_add(&sdev->sdev_gendev); | |
670 | if (error) { | |
671 | put_device(sdev->sdev_gendev.parent); | |
672 | printk(KERN_INFO "error 1\n"); | |
673 | return error; | |
674 | } | |
675 | error = class_device_add(&sdev->sdev_classdev); | |
676 | if (error) { | |
677 | printk(KERN_INFO "error 2\n"); | |
678 | goto clean_device; | |
679 | } | |
680 | ||
681 | /* take a reference for the sdev_classdev; this is | |
682 | * released by the sdev_class .release */ | |
683 | get_device(&sdev->sdev_gendev); | |
684 | if (sdev->host->hostt->sdev_attrs) { | |
685 | for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { | |
686 | error = attr_add(&sdev->sdev_gendev, | |
687 | sdev->host->hostt->sdev_attrs[i]); | |
688 | if (error) { | |
903f4fed | 689 | __scsi_remove_device(sdev); |
1da177e4 LT |
690 | goto out; |
691 | } | |
692 | } | |
693 | } | |
694 | ||
695 | for (i = 0; scsi_sysfs_sdev_attrs[i]; i++) { | |
696 | if (!attr_overridden(sdev->host->hostt->sdev_attrs, | |
697 | scsi_sysfs_sdev_attrs[i])) { | |
698 | struct device_attribute * attr = | |
699 | attr_changed_internally(sdev->host, | |
700 | scsi_sysfs_sdev_attrs[i]); | |
701 | error = device_create_file(&sdev->sdev_gendev, attr); | |
702 | if (error) { | |
903f4fed | 703 | __scsi_remove_device(sdev); |
1da177e4 LT |
704 | goto out; |
705 | } | |
706 | } | |
707 | } | |
708 | ||
709 | transport_add_device(&sdev->sdev_gendev); | |
710 | out: | |
711 | return error; | |
712 | ||
713 | clean_device: | |
714 | scsi_device_set_state(sdev, SDEV_CANCEL); | |
715 | ||
716 | device_del(&sdev->sdev_gendev); | |
717 | transport_destroy_device(&sdev->sdev_gendev); | |
718 | put_device(&sdev->sdev_gendev); | |
719 | ||
720 | return error; | |
721 | } | |
722 | ||
903f4fed | 723 | void __scsi_remove_device(struct scsi_device *sdev) |
1da177e4 | 724 | { |
df133c21 JB |
725 | struct device *dev = &sdev->sdev_gendev; |
726 | ||
1da177e4 | 727 | if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0) |
903f4fed | 728 | return; |
1da177e4 LT |
729 | |
730 | class_device_unregister(&sdev->sdev_classdev); | |
df133c21 JB |
731 | transport_remove_device(dev); |
732 | device_del(dev); | |
1da177e4 LT |
733 | scsi_device_set_state(sdev, SDEV_DEL); |
734 | if (sdev->host->hostt->slave_destroy) | |
735 | sdev->host->hostt->slave_destroy(sdev); | |
df133c21 JB |
736 | transport_destroy_device(dev); |
737 | put_device(dev); | |
903f4fed AS |
738 | } |
739 | ||
740 | /** | |
741 | * scsi_remove_device - unregister a device from the scsi bus | |
742 | * @sdev: scsi_device to unregister | |
743 | **/ | |
744 | void scsi_remove_device(struct scsi_device *sdev) | |
745 | { | |
54195002 AS |
746 | struct Scsi_Host *shost = sdev->host; |
747 | ||
0b950672 | 748 | mutex_lock(&shost->scan_mutex); |
903f4fed | 749 | __scsi_remove_device(sdev); |
0b950672 | 750 | mutex_unlock(&shost->scan_mutex); |
1da177e4 LT |
751 | } |
752 | EXPORT_SYMBOL(scsi_remove_device); | |
753 | ||
754 | void __scsi_remove_target(struct scsi_target *starget) | |
755 | { | |
756 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
757 | unsigned long flags; | |
a64358db | 758 | struct scsi_device *sdev; |
1da177e4 LT |
759 | |
760 | spin_lock_irqsave(shost->host_lock, flags); | |
761 | starget->reap_ref++; | |
a64358db AS |
762 | restart: |
763 | list_for_each_entry(sdev, &shost->__devices, siblings) { | |
1da177e4 | 764 | if (sdev->channel != starget->channel || |
a64358db AS |
765 | sdev->id != starget->id || |
766 | sdev->sdev_state == SDEV_DEL) | |
1da177e4 LT |
767 | continue; |
768 | spin_unlock_irqrestore(shost->host_lock, flags); | |
769 | scsi_remove_device(sdev); | |
770 | spin_lock_irqsave(shost->host_lock, flags); | |
a64358db | 771 | goto restart; |
1da177e4 LT |
772 | } |
773 | spin_unlock_irqrestore(shost->host_lock, flags); | |
774 | scsi_target_reap(starget); | |
775 | } | |
776 | ||
20b1e674 | 777 | static int __remove_child (struct device * dev, void * data) |
778 | { | |
779 | if (scsi_is_target_device(dev)) | |
780 | __scsi_remove_target(to_scsi_target(dev)); | |
781 | return 0; | |
782 | } | |
783 | ||
1da177e4 LT |
784 | /** |
785 | * scsi_remove_target - try to remove a target and all its devices | |
786 | * @dev: generic starget or parent of generic stargets to be removed | |
787 | * | |
788 | * Note: This is slightly racy. It is possible that if the user | |
789 | * requests the addition of another device then the target won't be | |
790 | * removed. | |
791 | */ | |
792 | void scsi_remove_target(struct device *dev) | |
793 | { | |
20b1e674 | 794 | struct device *rdev; |
1da177e4 LT |
795 | |
796 | if (scsi_is_target_device(dev)) { | |
797 | __scsi_remove_target(to_scsi_target(dev)); | |
798 | return; | |
799 | } | |
800 | ||
801 | rdev = get_device(dev); | |
20b1e674 | 802 | device_for_each_child(dev, NULL, __remove_child); |
1da177e4 LT |
803 | put_device(rdev); |
804 | } | |
805 | EXPORT_SYMBOL(scsi_remove_target); | |
806 | ||
807 | int scsi_register_driver(struct device_driver *drv) | |
808 | { | |
809 | drv->bus = &scsi_bus_type; | |
810 | ||
811 | return driver_register(drv); | |
812 | } | |
813 | EXPORT_SYMBOL(scsi_register_driver); | |
814 | ||
815 | int scsi_register_interface(struct class_interface *intf) | |
816 | { | |
817 | intf->class = &sdev_class; | |
818 | ||
819 | return class_interface_register(intf); | |
820 | } | |
821 | EXPORT_SYMBOL(scsi_register_interface); | |
822 | ||
823 | ||
824 | static struct class_device_attribute *class_attr_overridden( | |
825 | struct class_device_attribute **attrs, | |
826 | struct class_device_attribute *attr) | |
827 | { | |
828 | int i; | |
829 | ||
830 | if (!attrs) | |
831 | return NULL; | |
832 | for (i = 0; attrs[i]; i++) | |
833 | if (!strcmp(attrs[i]->attr.name, attr->attr.name)) | |
834 | return attrs[i]; | |
835 | return NULL; | |
836 | } | |
837 | ||
838 | static int class_attr_add(struct class_device *classdev, | |
839 | struct class_device_attribute *attr) | |
840 | { | |
841 | struct class_device_attribute *base_attr; | |
842 | ||
843 | /* | |
844 | * Spare the caller from having to copy things it's not interested in. | |
845 | */ | |
846 | base_attr = class_attr_overridden(scsi_sysfs_shost_attrs, attr); | |
847 | if (base_attr) { | |
848 | /* extend permissions */ | |
849 | attr->attr.mode |= base_attr->attr.mode; | |
850 | ||
851 | /* override null show/store with default */ | |
852 | if (!attr->show) | |
853 | attr->show = base_attr->show; | |
854 | if (!attr->store) | |
855 | attr->store = base_attr->store; | |
856 | } | |
857 | ||
858 | return class_device_create_file(classdev, attr); | |
859 | } | |
860 | ||
861 | /** | |
862 | * scsi_sysfs_add_host - add scsi host to subsystem | |
863 | * @shost: scsi host struct to add to subsystem | |
864 | * @dev: parent struct device pointer | |
865 | **/ | |
866 | int scsi_sysfs_add_host(struct Scsi_Host *shost) | |
867 | { | |
868 | int error, i; | |
869 | ||
870 | if (shost->hostt->shost_attrs) { | |
871 | for (i = 0; shost->hostt->shost_attrs[i]; i++) { | |
872 | error = class_attr_add(&shost->shost_classdev, | |
873 | shost->hostt->shost_attrs[i]); | |
874 | if (error) | |
875 | return error; | |
876 | } | |
877 | } | |
878 | ||
879 | for (i = 0; scsi_sysfs_shost_attrs[i]; i++) { | |
880 | if (!class_attr_overridden(shost->hostt->shost_attrs, | |
881 | scsi_sysfs_shost_attrs[i])) { | |
882 | error = class_device_create_file(&shost->shost_classdev, | |
883 | scsi_sysfs_shost_attrs[i]); | |
884 | if (error) | |
885 | return error; | |
886 | } | |
887 | } | |
888 | ||
889 | transport_register_device(&shost->shost_gendev); | |
890 | return 0; | |
891 | } | |
892 | ||
893 | void scsi_sysfs_device_initialize(struct scsi_device *sdev) | |
894 | { | |
895 | unsigned long flags; | |
896 | struct Scsi_Host *shost = sdev->host; | |
897 | struct scsi_target *starget = sdev->sdev_target; | |
898 | ||
899 | device_initialize(&sdev->sdev_gendev); | |
900 | sdev->sdev_gendev.bus = &scsi_bus_type; | |
901 | sdev->sdev_gendev.release = scsi_device_dev_release; | |
902 | sprintf(sdev->sdev_gendev.bus_id,"%d:%d:%d:%d", | |
903 | sdev->host->host_no, sdev->channel, sdev->id, | |
904 | sdev->lun); | |
905 | ||
906 | class_device_initialize(&sdev->sdev_classdev); | |
907 | sdev->sdev_classdev.dev = &sdev->sdev_gendev; | |
908 | sdev->sdev_classdev.class = &sdev_class; | |
909 | snprintf(sdev->sdev_classdev.class_id, BUS_ID_SIZE, | |
910 | "%d:%d:%d:%d", sdev->host->host_no, | |
911 | sdev->channel, sdev->id, sdev->lun); | |
912 | sdev->scsi_level = SCSI_2; | |
913 | transport_setup_device(&sdev->sdev_gendev); | |
914 | spin_lock_irqsave(shost->host_lock, flags); | |
915 | list_add_tail(&sdev->same_target_siblings, &starget->devices); | |
916 | list_add_tail(&sdev->siblings, &shost->__devices); | |
917 | spin_unlock_irqrestore(shost->host_lock, flags); | |
918 | } | |
919 | ||
920 | int scsi_is_sdev_device(const struct device *dev) | |
921 | { | |
922 | return dev->release == scsi_device_dev_release; | |
923 | } | |
924 | EXPORT_SYMBOL(scsi_is_sdev_device); | |
925 | ||
926 | /* A blank transport template that is used in drivers that don't | |
927 | * yet implement Transport Attributes */ | |
928 | struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |