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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 | ||
1da177e4 LT |
9 | #include <linux/module.h> |
10 | #include <linux/init.h> | |
11 | #include <linux/blkdev.h> | |
12 | #include <linux/device.h> | |
13 | ||
14 | #include <scsi/scsi.h> | |
15 | #include <scsi/scsi_device.h> | |
16 | #include <scsi/scsi_host.h> | |
17 | #include <scsi/scsi_tcq.h> | |
18 | #include <scsi/scsi_transport.h> | |
19 | ||
20 | #include "scsi_priv.h" | |
21 | #include "scsi_logging.h" | |
22 | ||
0ad78200 | 23 | static const struct { |
1da177e4 LT |
24 | enum scsi_device_state value; |
25 | char *name; | |
26 | } sdev_states[] = { | |
27 | { SDEV_CREATED, "created" }, | |
28 | { SDEV_RUNNING, "running" }, | |
29 | { SDEV_CANCEL, "cancel" }, | |
30 | { SDEV_DEL, "deleted" }, | |
31 | { SDEV_QUIESCE, "quiesce" }, | |
32 | { SDEV_OFFLINE, "offline" }, | |
33 | { SDEV_BLOCK, "blocked" }, | |
34 | }; | |
35 | ||
36 | const char *scsi_device_state_name(enum scsi_device_state state) | |
37 | { | |
38 | int i; | |
39 | char *name = NULL; | |
40 | ||
6391a113 | 41 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
42 | if (sdev_states[i].value == state) { |
43 | name = sdev_states[i].name; | |
44 | break; | |
45 | } | |
46 | } | |
47 | return name; | |
48 | } | |
49 | ||
0ad78200 | 50 | static const struct { |
d3301874 MA |
51 | enum scsi_host_state value; |
52 | char *name; | |
53 | } shost_states[] = { | |
54 | { SHOST_CREATED, "created" }, | |
55 | { SHOST_RUNNING, "running" }, | |
56 | { SHOST_CANCEL, "cancel" }, | |
57 | { SHOST_DEL, "deleted" }, | |
58 | { SHOST_RECOVERY, "recovery" }, | |
939647ee JB |
59 | { SHOST_CANCEL_RECOVERY, "cancel/recovery" }, |
60 | { SHOST_DEL_RECOVERY, "deleted/recovery", }, | |
d3301874 MA |
61 | }; |
62 | const char *scsi_host_state_name(enum scsi_host_state state) | |
63 | { | |
64 | int i; | |
65 | char *name = NULL; | |
66 | ||
6391a113 | 67 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
68 | if (shost_states[i].value == state) { |
69 | name = shost_states[i].name; | |
70 | break; | |
71 | } | |
72 | } | |
73 | return name; | |
74 | } | |
75 | ||
1da177e4 LT |
76 | static int check_set(unsigned int *val, char *src) |
77 | { | |
78 | char *last; | |
79 | ||
80 | if (strncmp(src, "-", 20) == 0) { | |
81 | *val = SCAN_WILD_CARD; | |
82 | } else { | |
83 | /* | |
84 | * Doesn't check for int overflow | |
85 | */ | |
86 | *val = simple_strtoul(src, &last, 0); | |
87 | if (*last != '\0') | |
88 | return 1; | |
89 | } | |
90 | return 0; | |
91 | } | |
92 | ||
93 | static int scsi_scan(struct Scsi_Host *shost, const char *str) | |
94 | { | |
95 | char s1[15], s2[15], s3[15], junk; | |
96 | unsigned int channel, id, lun; | |
97 | int res; | |
98 | ||
99 | res = sscanf(str, "%10s %10s %10s %c", s1, s2, s3, &junk); | |
100 | if (res != 3) | |
101 | return -EINVAL; | |
102 | if (check_set(&channel, s1)) | |
103 | return -EINVAL; | |
104 | if (check_set(&id, s2)) | |
105 | return -EINVAL; | |
106 | if (check_set(&lun, s3)) | |
107 | return -EINVAL; | |
e02f3f59 CH |
108 | if (shost->transportt->user_scan) |
109 | res = shost->transportt->user_scan(shost, channel, id, lun); | |
110 | else | |
111 | res = scsi_scan_host_selected(shost, channel, id, lun, 1); | |
1da177e4 LT |
112 | return res; |
113 | } | |
114 | ||
115 | /* | |
116 | * shost_show_function: macro to create an attr function that can be used to | |
117 | * show a non-bit field. | |
118 | */ | |
119 | #define shost_show_function(name, field, format_string) \ | |
120 | static ssize_t \ | |
121 | show_##name (struct class_device *class_dev, char *buf) \ | |
122 | { \ | |
123 | struct Scsi_Host *shost = class_to_shost(class_dev); \ | |
124 | return snprintf (buf, 20, format_string, shost->field); \ | |
125 | } | |
126 | ||
127 | /* | |
128 | * shost_rd_attr: macro to create a function and attribute variable for a | |
129 | * read only field. | |
130 | */ | |
131 | #define shost_rd_attr2(name, field, format_string) \ | |
132 | shost_show_function(name, field, format_string) \ | |
133 | static CLASS_DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); | |
134 | ||
135 | #define shost_rd_attr(field, format_string) \ | |
136 | shost_rd_attr2(field, field, format_string) | |
137 | ||
138 | /* | |
139 | * Create the actual show/store functions and data structures. | |
140 | */ | |
141 | ||
142 | static ssize_t store_scan(struct class_device *class_dev, const char *buf, | |
143 | size_t count) | |
144 | { | |
145 | struct Scsi_Host *shost = class_to_shost(class_dev); | |
146 | int res; | |
147 | ||
148 | res = scsi_scan(shost, buf); | |
149 | if (res == 0) | |
150 | res = count; | |
151 | return res; | |
152 | }; | |
153 | static CLASS_DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); | |
154 | ||
d3301874 MA |
155 | static ssize_t |
156 | store_shost_state(struct class_device *class_dev, const char *buf, size_t count) | |
157 | { | |
158 | int i; | |
159 | struct Scsi_Host *shost = class_to_shost(class_dev); | |
160 | enum scsi_host_state state = 0; | |
161 | ||
6391a113 | 162 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
163 | const int len = strlen(shost_states[i].name); |
164 | if (strncmp(shost_states[i].name, buf, len) == 0 && | |
165 | buf[len] == '\n') { | |
166 | state = shost_states[i].value; | |
167 | break; | |
168 | } | |
169 | } | |
170 | if (!state) | |
171 | return -EINVAL; | |
172 | ||
173 | if (scsi_host_set_state(shost, state)) | |
174 | return -EINVAL; | |
175 | return count; | |
176 | } | |
177 | ||
178 | static ssize_t | |
179 | show_shost_state(struct class_device *class_dev, char *buf) | |
180 | { | |
181 | struct Scsi_Host *shost = class_to_shost(class_dev); | |
182 | const char *name = scsi_host_state_name(shost->shost_state); | |
183 | ||
184 | if (!name) | |
185 | return -EINVAL; | |
186 | ||
187 | return snprintf(buf, 20, "%s\n", name); | |
188 | } | |
189 | ||
190 | static CLASS_DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state); | |
191 | ||
1da177e4 LT |
192 | shost_rd_attr(unique_id, "%u\n"); |
193 | shost_rd_attr(host_busy, "%hu\n"); | |
194 | shost_rd_attr(cmd_per_lun, "%hd\n"); | |
195 | shost_rd_attr(sg_tablesize, "%hu\n"); | |
196 | shost_rd_attr(unchecked_isa_dma, "%d\n"); | |
197 | shost_rd_attr2(proc_name, hostt->proc_name, "%s\n"); | |
198 | ||
199 | static struct class_device_attribute *scsi_sysfs_shost_attrs[] = { | |
200 | &class_device_attr_unique_id, | |
201 | &class_device_attr_host_busy, | |
202 | &class_device_attr_cmd_per_lun, | |
203 | &class_device_attr_sg_tablesize, | |
204 | &class_device_attr_unchecked_isa_dma, | |
205 | &class_device_attr_proc_name, | |
206 | &class_device_attr_scan, | |
d3301874 | 207 | &class_device_attr_state, |
1da177e4 LT |
208 | NULL |
209 | }; | |
210 | ||
211 | static void scsi_device_cls_release(struct class_device *class_dev) | |
212 | { | |
213 | struct scsi_device *sdev; | |
214 | ||
215 | sdev = class_to_sdev(class_dev); | |
216 | put_device(&sdev->sdev_gendev); | |
217 | } | |
218 | ||
65110b21 | 219 | static void scsi_device_dev_release_usercontext(void *data) |
1da177e4 | 220 | { |
65110b21 | 221 | struct device *dev = data; |
1da177e4 LT |
222 | struct scsi_device *sdev; |
223 | struct device *parent; | |
224 | struct scsi_target *starget; | |
225 | unsigned long flags; | |
226 | ||
227 | parent = dev->parent; | |
228 | sdev = to_scsi_device(dev); | |
229 | starget = to_scsi_target(parent); | |
230 | ||
231 | spin_lock_irqsave(sdev->host->host_lock, flags); | |
232 | starget->reap_ref++; | |
233 | list_del(&sdev->siblings); | |
234 | list_del(&sdev->same_target_siblings); | |
235 | list_del(&sdev->starved_entry); | |
236 | spin_unlock_irqrestore(sdev->host->host_lock, flags); | |
237 | ||
238 | if (sdev->request_queue) { | |
239 | sdev->request_queue->queuedata = NULL; | |
65110b21 | 240 | /* user context needed to free queue */ |
1da177e4 | 241 | scsi_free_queue(sdev->request_queue); |
c2a9331c JB |
242 | /* temporary expedient, try to catch use of queue lock |
243 | * after free of sdev */ | |
244 | sdev->request_queue = NULL; | |
1da177e4 LT |
245 | } |
246 | ||
247 | scsi_target_reap(scsi_target(sdev)); | |
248 | ||
249 | kfree(sdev->inquiry); | |
250 | kfree(sdev); | |
251 | ||
252 | if (parent) | |
253 | put_device(parent); | |
254 | } | |
255 | ||
65110b21 JB |
256 | static void scsi_device_dev_release(struct device *dev) |
257 | { | |
ffedb452 JB |
258 | struct scsi_device *sdp = to_scsi_device(dev); |
259 | execute_in_process_context(scsi_device_dev_release_usercontext, dev, | |
260 | &sdp->ew); | |
65110b21 JB |
261 | } |
262 | ||
52c1da39 | 263 | static struct class sdev_class = { |
1da177e4 LT |
264 | .name = "scsi_device", |
265 | .release = scsi_device_cls_release, | |
266 | }; | |
267 | ||
268 | /* all probing is done in the individual ->probe routines */ | |
269 | static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) | |
270 | { | |
271 | struct scsi_device *sdp = to_scsi_device(dev); | |
272 | if (sdp->no_uld_attach) | |
273 | return 0; | |
274 | return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; | |
275 | } | |
276 | ||
9b847548 JA |
277 | static int scsi_bus_suspend(struct device * dev, pm_message_t state) |
278 | { | |
279 | struct scsi_device *sdev = to_scsi_device(dev); | |
280 | struct scsi_host_template *sht = sdev->host->hostt; | |
281 | int err; | |
282 | ||
283 | err = scsi_device_quiesce(sdev); | |
284 | if (err) | |
285 | return err; | |
286 | ||
287 | if (sht->suspend) | |
082776e4 | 288 | err = sht->suspend(sdev, state); |
9b847548 JA |
289 | |
290 | return err; | |
291 | } | |
292 | ||
293 | static int scsi_bus_resume(struct device * dev) | |
294 | { | |
295 | struct scsi_device *sdev = to_scsi_device(dev); | |
296 | struct scsi_host_template *sht = sdev->host->hostt; | |
297 | int err = 0; | |
298 | ||
299 | if (sht->resume) | |
300 | err = sht->resume(sdev); | |
301 | ||
302 | scsi_device_resume(sdev); | |
303 | return err; | |
304 | } | |
305 | ||
1da177e4 LT |
306 | struct bus_type scsi_bus_type = { |
307 | .name = "scsi", | |
308 | .match = scsi_bus_match, | |
9b847548 JA |
309 | .suspend = scsi_bus_suspend, |
310 | .resume = scsi_bus_resume, | |
1da177e4 LT |
311 | }; |
312 | ||
313 | int scsi_sysfs_register(void) | |
314 | { | |
315 | int error; | |
316 | ||
317 | error = bus_register(&scsi_bus_type); | |
318 | if (!error) { | |
319 | error = class_register(&sdev_class); | |
320 | if (error) | |
321 | bus_unregister(&scsi_bus_type); | |
322 | } | |
323 | ||
324 | return error; | |
325 | } | |
326 | ||
327 | void scsi_sysfs_unregister(void) | |
328 | { | |
329 | class_unregister(&sdev_class); | |
330 | bus_unregister(&scsi_bus_type); | |
331 | } | |
332 | ||
333 | /* | |
334 | * sdev_show_function: macro to create an attr function that can be used to | |
335 | * show a non-bit field. | |
336 | */ | |
337 | #define sdev_show_function(field, format_string) \ | |
338 | static ssize_t \ | |
10523b3b | 339 | sdev_show_##field (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
340 | { \ |
341 | struct scsi_device *sdev; \ | |
342 | sdev = to_scsi_device(dev); \ | |
343 | return snprintf (buf, 20, format_string, sdev->field); \ | |
344 | } \ | |
345 | ||
346 | /* | |
347 | * sdev_rd_attr: macro to create a function and attribute variable for a | |
348 | * read only field. | |
349 | */ | |
350 | #define sdev_rd_attr(field, format_string) \ | |
351 | sdev_show_function(field, format_string) \ | |
352 | static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); | |
353 | ||
354 | ||
355 | /* | |
356 | * sdev_rd_attr: create a function and attribute variable for a | |
357 | * read/write field. | |
358 | */ | |
359 | #define sdev_rw_attr(field, format_string) \ | |
360 | sdev_show_function(field, format_string) \ | |
361 | \ | |
362 | static ssize_t \ | |
10523b3b | 363 | sdev_store_##field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \ |
1da177e4 LT |
364 | { \ |
365 | struct scsi_device *sdev; \ | |
366 | sdev = to_scsi_device(dev); \ | |
367 | snscanf (buf, 20, format_string, &sdev->field); \ | |
368 | return count; \ | |
369 | } \ | |
370 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
371 | ||
372 | /* Currently we don't export bit fields, but we might in future, | |
373 | * so leave this code in */ | |
374 | #if 0 | |
375 | /* | |
376 | * sdev_rd_attr: create a function and attribute variable for a | |
377 | * read/write bit field. | |
378 | */ | |
379 | #define sdev_rw_attr_bit(field) \ | |
380 | sdev_show_function(field, "%d\n") \ | |
381 | \ | |
382 | static ssize_t \ | |
10523b3b | 383 | sdev_store_##field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \ |
1da177e4 LT |
384 | { \ |
385 | int ret; \ | |
386 | struct scsi_device *sdev; \ | |
387 | ret = scsi_sdev_check_buf_bit(buf); \ | |
388 | if (ret >= 0) { \ | |
389 | sdev = to_scsi_device(dev); \ | |
390 | sdev->field = ret; \ | |
391 | ret = count; \ | |
392 | } \ | |
393 | return ret; \ | |
394 | } \ | |
395 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
396 | ||
397 | /* | |
398 | * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", | |
399 | * else return -EINVAL. | |
400 | */ | |
401 | static int scsi_sdev_check_buf_bit(const char *buf) | |
402 | { | |
403 | if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { | |
404 | if (buf[0] == '1') | |
405 | return 1; | |
406 | else if (buf[0] == '0') | |
407 | return 0; | |
408 | else | |
409 | return -EINVAL; | |
410 | } else | |
411 | return -EINVAL; | |
412 | } | |
413 | #endif | |
414 | /* | |
415 | * Create the actual show/store functions and data structures. | |
416 | */ | |
417 | sdev_rd_attr (device_blocked, "%d\n"); | |
418 | sdev_rd_attr (queue_depth, "%d\n"); | |
419 | sdev_rd_attr (type, "%d\n"); | |
420 | sdev_rd_attr (scsi_level, "%d\n"); | |
421 | sdev_rd_attr (vendor, "%.8s\n"); | |
422 | sdev_rd_attr (model, "%.16s\n"); | |
423 | sdev_rd_attr (rev, "%.4s\n"); | |
424 | ||
425 | static ssize_t | |
10523b3b | 426 | sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
427 | { |
428 | struct scsi_device *sdev; | |
429 | sdev = to_scsi_device(dev); | |
430 | return snprintf (buf, 20, "%d\n", sdev->timeout / HZ); | |
431 | } | |
432 | ||
433 | static ssize_t | |
10523b3b | 434 | sdev_store_timeout (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
435 | { |
436 | struct scsi_device *sdev; | |
437 | int timeout; | |
438 | sdev = to_scsi_device(dev); | |
439 | sscanf (buf, "%d\n", &timeout); | |
440 | sdev->timeout = timeout * HZ; | |
441 | return count; | |
442 | } | |
443 | static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); | |
444 | ||
445 | static ssize_t | |
10523b3b | 446 | store_rescan_field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
447 | { |
448 | scsi_rescan_device(dev); | |
449 | return count; | |
450 | } | |
451 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); | |
452 | ||
10523b3b | 453 | static ssize_t sdev_store_delete(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
454 | size_t count) |
455 | { | |
456 | scsi_remove_device(to_scsi_device(dev)); | |
457 | return count; | |
458 | }; | |
459 | static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); | |
460 | ||
461 | static ssize_t | |
10523b3b | 462 | store_state_field(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
463 | { |
464 | int i; | |
465 | struct scsi_device *sdev = to_scsi_device(dev); | |
466 | enum scsi_device_state state = 0; | |
467 | ||
6391a113 | 468 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
469 | const int len = strlen(sdev_states[i].name); |
470 | if (strncmp(sdev_states[i].name, buf, len) == 0 && | |
471 | buf[len] == '\n') { | |
472 | state = sdev_states[i].value; | |
473 | break; | |
474 | } | |
475 | } | |
476 | if (!state) | |
477 | return -EINVAL; | |
478 | ||
479 | if (scsi_device_set_state(sdev, state)) | |
480 | return -EINVAL; | |
481 | return count; | |
482 | } | |
483 | ||
484 | static ssize_t | |
10523b3b | 485 | show_state_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
486 | { |
487 | struct scsi_device *sdev = to_scsi_device(dev); | |
488 | const char *name = scsi_device_state_name(sdev->sdev_state); | |
489 | ||
490 | if (!name) | |
491 | return -EINVAL; | |
492 | ||
493 | return snprintf(buf, 20, "%s\n", name); | |
494 | } | |
495 | ||
496 | static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); | |
497 | ||
498 | static ssize_t | |
10523b3b | 499 | show_queue_type_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
500 | { |
501 | struct scsi_device *sdev = to_scsi_device(dev); | |
502 | const char *name = "none"; | |
503 | ||
504 | if (sdev->ordered_tags) | |
505 | name = "ordered"; | |
506 | else if (sdev->simple_tags) | |
507 | name = "simple"; | |
508 | ||
509 | return snprintf(buf, 20, "%s\n", name); | |
510 | } | |
511 | ||
512 | static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL); | |
513 | ||
514 | static ssize_t | |
10523b3b | 515 | show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
516 | { |
517 | return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); | |
518 | } | |
519 | ||
520 | static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); | |
521 | ||
522 | #define show_sdev_iostat(field) \ | |
523 | static ssize_t \ | |
10523b3b | 524 | show_iostat_##field(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
525 | { \ |
526 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
527 | unsigned long long count = atomic_read(&sdev->field); \ | |
528 | return snprintf(buf, 20, "0x%llx\n", count); \ | |
529 | } \ | |
530 | static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) | |
531 | ||
532 | show_sdev_iostat(iorequest_cnt); | |
533 | show_sdev_iostat(iodone_cnt); | |
534 | show_sdev_iostat(ioerr_cnt); | |
535 | ||
536 | ||
537 | /* Default template for device attributes. May NOT be modified */ | |
538 | static struct device_attribute *scsi_sysfs_sdev_attrs[] = { | |
539 | &dev_attr_device_blocked, | |
540 | &dev_attr_queue_depth, | |
541 | &dev_attr_queue_type, | |
542 | &dev_attr_type, | |
543 | &dev_attr_scsi_level, | |
544 | &dev_attr_vendor, | |
545 | &dev_attr_model, | |
546 | &dev_attr_rev, | |
547 | &dev_attr_rescan, | |
548 | &dev_attr_delete, | |
549 | &dev_attr_state, | |
550 | &dev_attr_timeout, | |
551 | &dev_attr_iocounterbits, | |
552 | &dev_attr_iorequest_cnt, | |
553 | &dev_attr_iodone_cnt, | |
554 | &dev_attr_ioerr_cnt, | |
555 | NULL | |
556 | }; | |
557 | ||
10523b3b | 558 | static ssize_t sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
559 | size_t count) |
560 | { | |
561 | int depth, retval; | |
562 | struct scsi_device *sdev = to_scsi_device(dev); | |
563 | struct scsi_host_template *sht = sdev->host->hostt; | |
564 | ||
565 | if (!sht->change_queue_depth) | |
566 | return -EINVAL; | |
567 | ||
568 | depth = simple_strtoul(buf, NULL, 0); | |
569 | ||
570 | if (depth < 1) | |
571 | return -EINVAL; | |
572 | ||
573 | retval = sht->change_queue_depth(sdev, depth); | |
574 | if (retval < 0) | |
575 | return retval; | |
576 | ||
577 | return count; | |
578 | } | |
579 | ||
580 | static struct device_attribute sdev_attr_queue_depth_rw = | |
581 | __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, | |
582 | sdev_store_queue_depth_rw); | |
583 | ||
10523b3b | 584 | static ssize_t sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
585 | size_t count) |
586 | { | |
587 | struct scsi_device *sdev = to_scsi_device(dev); | |
588 | struct scsi_host_template *sht = sdev->host->hostt; | |
589 | int tag_type = 0, retval; | |
590 | int prev_tag_type = scsi_get_tag_type(sdev); | |
591 | ||
592 | if (!sdev->tagged_supported || !sht->change_queue_type) | |
593 | return -EINVAL; | |
594 | ||
595 | if (strncmp(buf, "ordered", 7) == 0) | |
596 | tag_type = MSG_ORDERED_TAG; | |
597 | else if (strncmp(buf, "simple", 6) == 0) | |
598 | tag_type = MSG_SIMPLE_TAG; | |
599 | else if (strncmp(buf, "none", 4) != 0) | |
600 | return -EINVAL; | |
601 | ||
602 | if (tag_type == prev_tag_type) | |
603 | return count; | |
604 | ||
605 | retval = sht->change_queue_type(sdev, tag_type); | |
606 | if (retval < 0) | |
607 | return retval; | |
608 | ||
609 | return count; | |
610 | } | |
611 | ||
612 | static struct device_attribute sdev_attr_queue_type_rw = | |
613 | __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, | |
614 | sdev_store_queue_type_rw); | |
615 | ||
616 | static struct device_attribute *attr_changed_internally( | |
617 | struct Scsi_Host *shost, | |
618 | struct device_attribute * attr) | |
619 | { | |
620 | if (!strcmp("queue_depth", attr->attr.name) | |
621 | && shost->hostt->change_queue_depth) | |
622 | return &sdev_attr_queue_depth_rw; | |
623 | else if (!strcmp("queue_type", attr->attr.name) | |
624 | && shost->hostt->change_queue_type) | |
625 | return &sdev_attr_queue_type_rw; | |
626 | return attr; | |
627 | } | |
628 | ||
629 | ||
630 | static struct device_attribute *attr_overridden( | |
631 | struct device_attribute **attrs, | |
632 | struct device_attribute *attr) | |
633 | { | |
634 | int i; | |
635 | ||
636 | if (!attrs) | |
637 | return NULL; | |
638 | for (i = 0; attrs[i]; i++) | |
639 | if (!strcmp(attrs[i]->attr.name, attr->attr.name)) | |
640 | return attrs[i]; | |
641 | return NULL; | |
642 | } | |
643 | ||
644 | static int attr_add(struct device *dev, struct device_attribute *attr) | |
645 | { | |
646 | struct device_attribute *base_attr; | |
647 | ||
648 | /* | |
649 | * Spare the caller from having to copy things it's not interested in. | |
650 | */ | |
651 | base_attr = attr_overridden(scsi_sysfs_sdev_attrs, attr); | |
652 | if (base_attr) { | |
653 | /* extend permissions */ | |
654 | attr->attr.mode |= base_attr->attr.mode; | |
655 | ||
656 | /* override null show/store with default */ | |
657 | if (!attr->show) | |
658 | attr->show = base_attr->show; | |
659 | if (!attr->store) | |
660 | attr->store = base_attr->store; | |
661 | } | |
662 | ||
663 | return device_create_file(dev, attr); | |
664 | } | |
665 | ||
666 | /** | |
667 | * scsi_sysfs_add_sdev - add scsi device to sysfs | |
668 | * @sdev: scsi_device to add | |
669 | * | |
670 | * Return value: | |
671 | * 0 on Success / non-zero on Failure | |
672 | **/ | |
673 | int scsi_sysfs_add_sdev(struct scsi_device *sdev) | |
674 | { | |
675 | int error, i; | |
676 | ||
677 | if ((error = scsi_device_set_state(sdev, SDEV_RUNNING)) != 0) | |
678 | return error; | |
679 | ||
680 | error = device_add(&sdev->sdev_gendev); | |
681 | if (error) { | |
682 | put_device(sdev->sdev_gendev.parent); | |
683 | printk(KERN_INFO "error 1\n"); | |
684 | return error; | |
685 | } | |
686 | error = class_device_add(&sdev->sdev_classdev); | |
687 | if (error) { | |
688 | printk(KERN_INFO "error 2\n"); | |
689 | goto clean_device; | |
690 | } | |
691 | ||
692 | /* take a reference for the sdev_classdev; this is | |
693 | * released by the sdev_class .release */ | |
694 | get_device(&sdev->sdev_gendev); | |
695 | if (sdev->host->hostt->sdev_attrs) { | |
696 | for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { | |
697 | error = attr_add(&sdev->sdev_gendev, | |
698 | sdev->host->hostt->sdev_attrs[i]); | |
699 | if (error) { | |
903f4fed | 700 | __scsi_remove_device(sdev); |
1da177e4 LT |
701 | goto out; |
702 | } | |
703 | } | |
704 | } | |
705 | ||
706 | for (i = 0; scsi_sysfs_sdev_attrs[i]; i++) { | |
707 | if (!attr_overridden(sdev->host->hostt->sdev_attrs, | |
708 | scsi_sysfs_sdev_attrs[i])) { | |
709 | struct device_attribute * attr = | |
710 | attr_changed_internally(sdev->host, | |
711 | scsi_sysfs_sdev_attrs[i]); | |
712 | error = device_create_file(&sdev->sdev_gendev, attr); | |
713 | if (error) { | |
903f4fed | 714 | __scsi_remove_device(sdev); |
1da177e4 LT |
715 | goto out; |
716 | } | |
717 | } | |
718 | } | |
719 | ||
720 | transport_add_device(&sdev->sdev_gendev); | |
721 | out: | |
722 | return error; | |
723 | ||
724 | clean_device: | |
725 | scsi_device_set_state(sdev, SDEV_CANCEL); | |
726 | ||
727 | device_del(&sdev->sdev_gendev); | |
728 | transport_destroy_device(&sdev->sdev_gendev); | |
729 | put_device(&sdev->sdev_gendev); | |
730 | ||
731 | return error; | |
732 | } | |
733 | ||
903f4fed | 734 | void __scsi_remove_device(struct scsi_device *sdev) |
1da177e4 | 735 | { |
df133c21 JB |
736 | struct device *dev = &sdev->sdev_gendev; |
737 | ||
1da177e4 | 738 | if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0) |
903f4fed | 739 | return; |
1da177e4 LT |
740 | |
741 | class_device_unregister(&sdev->sdev_classdev); | |
df133c21 JB |
742 | transport_remove_device(dev); |
743 | device_del(dev); | |
1da177e4 LT |
744 | scsi_device_set_state(sdev, SDEV_DEL); |
745 | if (sdev->host->hostt->slave_destroy) | |
746 | sdev->host->hostt->slave_destroy(sdev); | |
df133c21 JB |
747 | transport_destroy_device(dev); |
748 | put_device(dev); | |
903f4fed AS |
749 | } |
750 | ||
751 | /** | |
752 | * scsi_remove_device - unregister a device from the scsi bus | |
753 | * @sdev: scsi_device to unregister | |
754 | **/ | |
755 | void scsi_remove_device(struct scsi_device *sdev) | |
756 | { | |
54195002 AS |
757 | struct Scsi_Host *shost = sdev->host; |
758 | ||
0b950672 | 759 | mutex_lock(&shost->scan_mutex); |
903f4fed | 760 | __scsi_remove_device(sdev); |
0b950672 | 761 | mutex_unlock(&shost->scan_mutex); |
1da177e4 LT |
762 | } |
763 | EXPORT_SYMBOL(scsi_remove_device); | |
764 | ||
765 | void __scsi_remove_target(struct scsi_target *starget) | |
766 | { | |
767 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
768 | unsigned long flags; | |
a64358db | 769 | struct scsi_device *sdev; |
1da177e4 LT |
770 | |
771 | spin_lock_irqsave(shost->host_lock, flags); | |
772 | starget->reap_ref++; | |
a64358db AS |
773 | restart: |
774 | list_for_each_entry(sdev, &shost->__devices, siblings) { | |
1da177e4 | 775 | if (sdev->channel != starget->channel || |
a64358db AS |
776 | sdev->id != starget->id || |
777 | sdev->sdev_state == SDEV_DEL) | |
1da177e4 LT |
778 | continue; |
779 | spin_unlock_irqrestore(shost->host_lock, flags); | |
780 | scsi_remove_device(sdev); | |
781 | spin_lock_irqsave(shost->host_lock, flags); | |
a64358db | 782 | goto restart; |
1da177e4 LT |
783 | } |
784 | spin_unlock_irqrestore(shost->host_lock, flags); | |
785 | scsi_target_reap(starget); | |
786 | } | |
787 | ||
20b1e674 PM |
788 | static int __remove_child (struct device * dev, void * data) |
789 | { | |
790 | if (scsi_is_target_device(dev)) | |
791 | __scsi_remove_target(to_scsi_target(dev)); | |
792 | return 0; | |
793 | } | |
794 | ||
1da177e4 LT |
795 | /** |
796 | * scsi_remove_target - try to remove a target and all its devices | |
797 | * @dev: generic starget or parent of generic stargets to be removed | |
798 | * | |
799 | * Note: This is slightly racy. It is possible that if the user | |
800 | * requests the addition of another device then the target won't be | |
801 | * removed. | |
802 | */ | |
803 | void scsi_remove_target(struct device *dev) | |
804 | { | |
20b1e674 | 805 | struct device *rdev; |
1da177e4 LT |
806 | |
807 | if (scsi_is_target_device(dev)) { | |
808 | __scsi_remove_target(to_scsi_target(dev)); | |
809 | return; | |
810 | } | |
811 | ||
812 | rdev = get_device(dev); | |
20b1e674 | 813 | device_for_each_child(dev, NULL, __remove_child); |
1da177e4 LT |
814 | put_device(rdev); |
815 | } | |
816 | EXPORT_SYMBOL(scsi_remove_target); | |
817 | ||
818 | int scsi_register_driver(struct device_driver *drv) | |
819 | { | |
820 | drv->bus = &scsi_bus_type; | |
821 | ||
822 | return driver_register(drv); | |
823 | } | |
824 | EXPORT_SYMBOL(scsi_register_driver); | |
825 | ||
826 | int scsi_register_interface(struct class_interface *intf) | |
827 | { | |
828 | intf->class = &sdev_class; | |
829 | ||
830 | return class_interface_register(intf); | |
831 | } | |
832 | EXPORT_SYMBOL(scsi_register_interface); | |
833 | ||
834 | ||
835 | static struct class_device_attribute *class_attr_overridden( | |
836 | struct class_device_attribute **attrs, | |
837 | struct class_device_attribute *attr) | |
838 | { | |
839 | int i; | |
840 | ||
841 | if (!attrs) | |
842 | return NULL; | |
843 | for (i = 0; attrs[i]; i++) | |
844 | if (!strcmp(attrs[i]->attr.name, attr->attr.name)) | |
845 | return attrs[i]; | |
846 | return NULL; | |
847 | } | |
848 | ||
849 | static int class_attr_add(struct class_device *classdev, | |
850 | struct class_device_attribute *attr) | |
851 | { | |
852 | struct class_device_attribute *base_attr; | |
853 | ||
854 | /* | |
855 | * Spare the caller from having to copy things it's not interested in. | |
856 | */ | |
857 | base_attr = class_attr_overridden(scsi_sysfs_shost_attrs, attr); | |
858 | if (base_attr) { | |
859 | /* extend permissions */ | |
860 | attr->attr.mode |= base_attr->attr.mode; | |
861 | ||
862 | /* override null show/store with default */ | |
863 | if (!attr->show) | |
864 | attr->show = base_attr->show; | |
865 | if (!attr->store) | |
866 | attr->store = base_attr->store; | |
867 | } | |
868 | ||
869 | return class_device_create_file(classdev, attr); | |
870 | } | |
871 | ||
872 | /** | |
873 | * scsi_sysfs_add_host - add scsi host to subsystem | |
874 | * @shost: scsi host struct to add to subsystem | |
875 | * @dev: parent struct device pointer | |
876 | **/ | |
877 | int scsi_sysfs_add_host(struct Scsi_Host *shost) | |
878 | { | |
879 | int error, i; | |
880 | ||
881 | if (shost->hostt->shost_attrs) { | |
882 | for (i = 0; shost->hostt->shost_attrs[i]; i++) { | |
883 | error = class_attr_add(&shost->shost_classdev, | |
884 | shost->hostt->shost_attrs[i]); | |
885 | if (error) | |
886 | return error; | |
887 | } | |
888 | } | |
889 | ||
890 | for (i = 0; scsi_sysfs_shost_attrs[i]; i++) { | |
891 | if (!class_attr_overridden(shost->hostt->shost_attrs, | |
892 | scsi_sysfs_shost_attrs[i])) { | |
893 | error = class_device_create_file(&shost->shost_classdev, | |
894 | scsi_sysfs_shost_attrs[i]); | |
895 | if (error) | |
896 | return error; | |
897 | } | |
898 | } | |
899 | ||
900 | transport_register_device(&shost->shost_gendev); | |
901 | return 0; | |
902 | } | |
903 | ||
904 | void scsi_sysfs_device_initialize(struct scsi_device *sdev) | |
905 | { | |
906 | unsigned long flags; | |
907 | struct Scsi_Host *shost = sdev->host; | |
908 | struct scsi_target *starget = sdev->sdev_target; | |
909 | ||
910 | device_initialize(&sdev->sdev_gendev); | |
911 | sdev->sdev_gendev.bus = &scsi_bus_type; | |
912 | sdev->sdev_gendev.release = scsi_device_dev_release; | |
913 | sprintf(sdev->sdev_gendev.bus_id,"%d:%d:%d:%d", | |
914 | sdev->host->host_no, sdev->channel, sdev->id, | |
915 | sdev->lun); | |
916 | ||
917 | class_device_initialize(&sdev->sdev_classdev); | |
918 | sdev->sdev_classdev.dev = &sdev->sdev_gendev; | |
919 | sdev->sdev_classdev.class = &sdev_class; | |
920 | snprintf(sdev->sdev_classdev.class_id, BUS_ID_SIZE, | |
921 | "%d:%d:%d:%d", sdev->host->host_no, | |
922 | sdev->channel, sdev->id, sdev->lun); | |
923 | sdev->scsi_level = SCSI_2; | |
924 | transport_setup_device(&sdev->sdev_gendev); | |
925 | spin_lock_irqsave(shost->host_lock, flags); | |
926 | list_add_tail(&sdev->same_target_siblings, &starget->devices); | |
927 | list_add_tail(&sdev->siblings, &shost->__devices); | |
928 | spin_unlock_irqrestore(shost->host_lock, flags); | |
929 | } | |
930 | ||
931 | int scsi_is_sdev_device(const struct device *dev) | |
932 | { | |
933 | return dev->release == scsi_device_dev_release; | |
934 | } | |
935 | EXPORT_SYMBOL(scsi_is_sdev_device); | |
936 | ||
937 | /* A blank transport template that is used in drivers that don't | |
938 | * yet implement Transport Attributes */ | |
939 | struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |