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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * scsi_sysfs.c | |
3 | * | |
4 | * SCSI sysfs interface routines. | |
5 | * | |
6 | * Created to pull SCSI mid layer sysfs routines into one file. | |
7 | */ | |
8 | ||
9 | #include <linux/config.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/blkdev.h> | |
13 | #include <linux/device.h> | |
14 | ||
15 | #include <scsi/scsi.h> | |
16 | #include <scsi/scsi_device.h> | |
17 | #include <scsi/scsi_host.h> | |
18 | #include <scsi/scsi_tcq.h> | |
19 | #include <scsi/scsi_transport.h> | |
20 | ||
21 | #include "scsi_priv.h" | |
22 | #include "scsi_logging.h" | |
23 | ||
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 JB |
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 | ||
266 | struct bus_type scsi_bus_type = { | |
267 | .name = "scsi", | |
268 | .match = scsi_bus_match, | |
269 | }; | |
270 | ||
271 | int scsi_sysfs_register(void) | |
272 | { | |
273 | int error; | |
274 | ||
275 | error = bus_register(&scsi_bus_type); | |
276 | if (!error) { | |
277 | error = class_register(&sdev_class); | |
278 | if (error) | |
279 | bus_unregister(&scsi_bus_type); | |
280 | } | |
281 | ||
282 | return error; | |
283 | } | |
284 | ||
285 | void scsi_sysfs_unregister(void) | |
286 | { | |
287 | class_unregister(&sdev_class); | |
288 | bus_unregister(&scsi_bus_type); | |
289 | } | |
290 | ||
291 | /* | |
292 | * sdev_show_function: macro to create an attr function that can be used to | |
293 | * show a non-bit field. | |
294 | */ | |
295 | #define sdev_show_function(field, format_string) \ | |
296 | static ssize_t \ | |
10523b3b | 297 | sdev_show_##field (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
298 | { \ |
299 | struct scsi_device *sdev; \ | |
300 | sdev = to_scsi_device(dev); \ | |
301 | return snprintf (buf, 20, format_string, sdev->field); \ | |
302 | } \ | |
303 | ||
304 | /* | |
305 | * sdev_rd_attr: macro to create a function and attribute variable for a | |
306 | * read only field. | |
307 | */ | |
308 | #define sdev_rd_attr(field, format_string) \ | |
309 | sdev_show_function(field, format_string) \ | |
310 | static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); | |
311 | ||
312 | ||
313 | /* | |
314 | * sdev_rd_attr: create a function and attribute variable for a | |
315 | * read/write field. | |
316 | */ | |
317 | #define sdev_rw_attr(field, format_string) \ | |
318 | sdev_show_function(field, format_string) \ | |
319 | \ | |
320 | static ssize_t \ | |
10523b3b | 321 | sdev_store_##field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \ |
1da177e4 LT |
322 | { \ |
323 | struct scsi_device *sdev; \ | |
324 | sdev = to_scsi_device(dev); \ | |
325 | snscanf (buf, 20, format_string, &sdev->field); \ | |
326 | return count; \ | |
327 | } \ | |
328 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
329 | ||
330 | /* Currently we don't export bit fields, but we might in future, | |
331 | * so leave this code in */ | |
332 | #if 0 | |
333 | /* | |
334 | * sdev_rd_attr: create a function and attribute variable for a | |
335 | * read/write bit field. | |
336 | */ | |
337 | #define sdev_rw_attr_bit(field) \ | |
338 | sdev_show_function(field, "%d\n") \ | |
339 | \ | |
340 | static ssize_t \ | |
10523b3b | 341 | sdev_store_##field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \ |
1da177e4 LT |
342 | { \ |
343 | int ret; \ | |
344 | struct scsi_device *sdev; \ | |
345 | ret = scsi_sdev_check_buf_bit(buf); \ | |
346 | if (ret >= 0) { \ | |
347 | sdev = to_scsi_device(dev); \ | |
348 | sdev->field = ret; \ | |
349 | ret = count; \ | |
350 | } \ | |
351 | return ret; \ | |
352 | } \ | |
353 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
354 | ||
355 | /* | |
356 | * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", | |
357 | * else return -EINVAL. | |
358 | */ | |
359 | static int scsi_sdev_check_buf_bit(const char *buf) | |
360 | { | |
361 | if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { | |
362 | if (buf[0] == '1') | |
363 | return 1; | |
364 | else if (buf[0] == '0') | |
365 | return 0; | |
366 | else | |
367 | return -EINVAL; | |
368 | } else | |
369 | return -EINVAL; | |
370 | } | |
371 | #endif | |
372 | /* | |
373 | * Create the actual show/store functions and data structures. | |
374 | */ | |
375 | sdev_rd_attr (device_blocked, "%d\n"); | |
376 | sdev_rd_attr (queue_depth, "%d\n"); | |
377 | sdev_rd_attr (type, "%d\n"); | |
378 | sdev_rd_attr (scsi_level, "%d\n"); | |
379 | sdev_rd_attr (vendor, "%.8s\n"); | |
380 | sdev_rd_attr (model, "%.16s\n"); | |
381 | sdev_rd_attr (rev, "%.4s\n"); | |
382 | ||
383 | static ssize_t | |
10523b3b | 384 | sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
385 | { |
386 | struct scsi_device *sdev; | |
387 | sdev = to_scsi_device(dev); | |
388 | return snprintf (buf, 20, "%d\n", sdev->timeout / HZ); | |
389 | } | |
390 | ||
391 | static ssize_t | |
10523b3b | 392 | sdev_store_timeout (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
393 | { |
394 | struct scsi_device *sdev; | |
395 | int timeout; | |
396 | sdev = to_scsi_device(dev); | |
397 | sscanf (buf, "%d\n", &timeout); | |
398 | sdev->timeout = timeout * HZ; | |
399 | return count; | |
400 | } | |
401 | static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); | |
402 | ||
403 | static ssize_t | |
10523b3b | 404 | store_rescan_field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
405 | { |
406 | scsi_rescan_device(dev); | |
407 | return count; | |
408 | } | |
409 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); | |
410 | ||
10523b3b | 411 | static ssize_t sdev_store_delete(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
412 | size_t count) |
413 | { | |
414 | scsi_remove_device(to_scsi_device(dev)); | |
415 | return count; | |
416 | }; | |
417 | static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); | |
418 | ||
419 | static ssize_t | |
10523b3b | 420 | store_state_field(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
421 | { |
422 | int i; | |
423 | struct scsi_device *sdev = to_scsi_device(dev); | |
424 | enum scsi_device_state state = 0; | |
425 | ||
426 | for (i = 0; i < sizeof(sdev_states)/sizeof(sdev_states[0]); i++) { | |
427 | const int len = strlen(sdev_states[i].name); | |
428 | if (strncmp(sdev_states[i].name, buf, len) == 0 && | |
429 | buf[len] == '\n') { | |
430 | state = sdev_states[i].value; | |
431 | break; | |
432 | } | |
433 | } | |
434 | if (!state) | |
435 | return -EINVAL; | |
436 | ||
437 | if (scsi_device_set_state(sdev, state)) | |
438 | return -EINVAL; | |
439 | return count; | |
440 | } | |
441 | ||
442 | static ssize_t | |
10523b3b | 443 | show_state_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
444 | { |
445 | struct scsi_device *sdev = to_scsi_device(dev); | |
446 | const char *name = scsi_device_state_name(sdev->sdev_state); | |
447 | ||
448 | if (!name) | |
449 | return -EINVAL; | |
450 | ||
451 | return snprintf(buf, 20, "%s\n", name); | |
452 | } | |
453 | ||
454 | static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); | |
455 | ||
456 | static ssize_t | |
10523b3b | 457 | show_queue_type_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
458 | { |
459 | struct scsi_device *sdev = to_scsi_device(dev); | |
460 | const char *name = "none"; | |
461 | ||
462 | if (sdev->ordered_tags) | |
463 | name = "ordered"; | |
464 | else if (sdev->simple_tags) | |
465 | name = "simple"; | |
466 | ||
467 | return snprintf(buf, 20, "%s\n", name); | |
468 | } | |
469 | ||
470 | static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL); | |
471 | ||
472 | static ssize_t | |
10523b3b | 473 | show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
474 | { |
475 | return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); | |
476 | } | |
477 | ||
478 | static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); | |
479 | ||
480 | #define show_sdev_iostat(field) \ | |
481 | static ssize_t \ | |
10523b3b | 482 | show_iostat_##field(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
483 | { \ |
484 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
485 | unsigned long long count = atomic_read(&sdev->field); \ | |
486 | return snprintf(buf, 20, "0x%llx\n", count); \ | |
487 | } \ | |
488 | static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) | |
489 | ||
490 | show_sdev_iostat(iorequest_cnt); | |
491 | show_sdev_iostat(iodone_cnt); | |
492 | show_sdev_iostat(ioerr_cnt); | |
493 | ||
494 | ||
495 | /* Default template for device attributes. May NOT be modified */ | |
496 | static struct device_attribute *scsi_sysfs_sdev_attrs[] = { | |
497 | &dev_attr_device_blocked, | |
498 | &dev_attr_queue_depth, | |
499 | &dev_attr_queue_type, | |
500 | &dev_attr_type, | |
501 | &dev_attr_scsi_level, | |
502 | &dev_attr_vendor, | |
503 | &dev_attr_model, | |
504 | &dev_attr_rev, | |
505 | &dev_attr_rescan, | |
506 | &dev_attr_delete, | |
507 | &dev_attr_state, | |
508 | &dev_attr_timeout, | |
509 | &dev_attr_iocounterbits, | |
510 | &dev_attr_iorequest_cnt, | |
511 | &dev_attr_iodone_cnt, | |
512 | &dev_attr_ioerr_cnt, | |
513 | NULL | |
514 | }; | |
515 | ||
10523b3b | 516 | static ssize_t sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
517 | size_t count) |
518 | { | |
519 | int depth, retval; | |
520 | struct scsi_device *sdev = to_scsi_device(dev); | |
521 | struct scsi_host_template *sht = sdev->host->hostt; | |
522 | ||
523 | if (!sht->change_queue_depth) | |
524 | return -EINVAL; | |
525 | ||
526 | depth = simple_strtoul(buf, NULL, 0); | |
527 | ||
528 | if (depth < 1) | |
529 | return -EINVAL; | |
530 | ||
531 | retval = sht->change_queue_depth(sdev, depth); | |
532 | if (retval < 0) | |
533 | return retval; | |
534 | ||
535 | return count; | |
536 | } | |
537 | ||
538 | static struct device_attribute sdev_attr_queue_depth_rw = | |
539 | __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, | |
540 | sdev_store_queue_depth_rw); | |
541 | ||
10523b3b | 542 | static ssize_t sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
543 | size_t count) |
544 | { | |
545 | struct scsi_device *sdev = to_scsi_device(dev); | |
546 | struct scsi_host_template *sht = sdev->host->hostt; | |
547 | int tag_type = 0, retval; | |
548 | int prev_tag_type = scsi_get_tag_type(sdev); | |
549 | ||
550 | if (!sdev->tagged_supported || !sht->change_queue_type) | |
551 | return -EINVAL; | |
552 | ||
553 | if (strncmp(buf, "ordered", 7) == 0) | |
554 | tag_type = MSG_ORDERED_TAG; | |
555 | else if (strncmp(buf, "simple", 6) == 0) | |
556 | tag_type = MSG_SIMPLE_TAG; | |
557 | else if (strncmp(buf, "none", 4) != 0) | |
558 | return -EINVAL; | |
559 | ||
560 | if (tag_type == prev_tag_type) | |
561 | return count; | |
562 | ||
563 | retval = sht->change_queue_type(sdev, tag_type); | |
564 | if (retval < 0) | |
565 | return retval; | |
566 | ||
567 | return count; | |
568 | } | |
569 | ||
570 | static struct device_attribute sdev_attr_queue_type_rw = | |
571 | __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, | |
572 | sdev_store_queue_type_rw); | |
573 | ||
574 | static struct device_attribute *attr_changed_internally( | |
575 | struct Scsi_Host *shost, | |
576 | struct device_attribute * attr) | |
577 | { | |
578 | if (!strcmp("queue_depth", attr->attr.name) | |
579 | && shost->hostt->change_queue_depth) | |
580 | return &sdev_attr_queue_depth_rw; | |
581 | else if (!strcmp("queue_type", attr->attr.name) | |
582 | && shost->hostt->change_queue_type) | |
583 | return &sdev_attr_queue_type_rw; | |
584 | return attr; | |
585 | } | |
586 | ||
587 | ||
588 | static struct device_attribute *attr_overridden( | |
589 | struct device_attribute **attrs, | |
590 | struct device_attribute *attr) | |
591 | { | |
592 | int i; | |
593 | ||
594 | if (!attrs) | |
595 | return NULL; | |
596 | for (i = 0; attrs[i]; i++) | |
597 | if (!strcmp(attrs[i]->attr.name, attr->attr.name)) | |
598 | return attrs[i]; | |
599 | return NULL; | |
600 | } | |
601 | ||
602 | static int attr_add(struct device *dev, struct device_attribute *attr) | |
603 | { | |
604 | struct device_attribute *base_attr; | |
605 | ||
606 | /* | |
607 | * Spare the caller from having to copy things it's not interested in. | |
608 | */ | |
609 | base_attr = attr_overridden(scsi_sysfs_sdev_attrs, attr); | |
610 | if (base_attr) { | |
611 | /* extend permissions */ | |
612 | attr->attr.mode |= base_attr->attr.mode; | |
613 | ||
614 | /* override null show/store with default */ | |
615 | if (!attr->show) | |
616 | attr->show = base_attr->show; | |
617 | if (!attr->store) | |
618 | attr->store = base_attr->store; | |
619 | } | |
620 | ||
621 | return device_create_file(dev, attr); | |
622 | } | |
623 | ||
624 | /** | |
625 | * scsi_sysfs_add_sdev - add scsi device to sysfs | |
626 | * @sdev: scsi_device to add | |
627 | * | |
628 | * Return value: | |
629 | * 0 on Success / non-zero on Failure | |
630 | **/ | |
631 | int scsi_sysfs_add_sdev(struct scsi_device *sdev) | |
632 | { | |
633 | int error, i; | |
634 | ||
635 | if ((error = scsi_device_set_state(sdev, SDEV_RUNNING)) != 0) | |
636 | return error; | |
637 | ||
638 | error = device_add(&sdev->sdev_gendev); | |
639 | if (error) { | |
640 | put_device(sdev->sdev_gendev.parent); | |
641 | printk(KERN_INFO "error 1\n"); | |
642 | return error; | |
643 | } | |
644 | error = class_device_add(&sdev->sdev_classdev); | |
645 | if (error) { | |
646 | printk(KERN_INFO "error 2\n"); | |
647 | goto clean_device; | |
648 | } | |
649 | ||
650 | /* take a reference for the sdev_classdev; this is | |
651 | * released by the sdev_class .release */ | |
652 | get_device(&sdev->sdev_gendev); | |
653 | if (sdev->host->hostt->sdev_attrs) { | |
654 | for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { | |
655 | error = attr_add(&sdev->sdev_gendev, | |
656 | sdev->host->hostt->sdev_attrs[i]); | |
657 | if (error) { | |
903f4fed | 658 | __scsi_remove_device(sdev); |
1da177e4 LT |
659 | goto out; |
660 | } | |
661 | } | |
662 | } | |
663 | ||
664 | for (i = 0; scsi_sysfs_sdev_attrs[i]; i++) { | |
665 | if (!attr_overridden(sdev->host->hostt->sdev_attrs, | |
666 | scsi_sysfs_sdev_attrs[i])) { | |
667 | struct device_attribute * attr = | |
668 | attr_changed_internally(sdev->host, | |
669 | scsi_sysfs_sdev_attrs[i]); | |
670 | error = device_create_file(&sdev->sdev_gendev, attr); | |
671 | if (error) { | |
903f4fed | 672 | __scsi_remove_device(sdev); |
1da177e4 LT |
673 | goto out; |
674 | } | |
675 | } | |
676 | } | |
677 | ||
678 | transport_add_device(&sdev->sdev_gendev); | |
679 | out: | |
680 | return error; | |
681 | ||
682 | clean_device: | |
683 | scsi_device_set_state(sdev, SDEV_CANCEL); | |
684 | ||
685 | device_del(&sdev->sdev_gendev); | |
686 | transport_destroy_device(&sdev->sdev_gendev); | |
687 | put_device(&sdev->sdev_gendev); | |
688 | ||
689 | return error; | |
690 | } | |
691 | ||
903f4fed | 692 | void __scsi_remove_device(struct scsi_device *sdev) |
1da177e4 | 693 | { |
df133c21 JB |
694 | struct device *dev = &sdev->sdev_gendev; |
695 | ||
1da177e4 | 696 | if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0) |
903f4fed | 697 | return; |
1da177e4 LT |
698 | |
699 | class_device_unregister(&sdev->sdev_classdev); | |
df133c21 JB |
700 | transport_remove_device(dev); |
701 | device_del(dev); | |
1da177e4 LT |
702 | scsi_device_set_state(sdev, SDEV_DEL); |
703 | if (sdev->host->hostt->slave_destroy) | |
704 | sdev->host->hostt->slave_destroy(sdev); | |
df133c21 JB |
705 | transport_destroy_device(dev); |
706 | put_device(dev); | |
903f4fed AS |
707 | } |
708 | ||
709 | /** | |
710 | * scsi_remove_device - unregister a device from the scsi bus | |
711 | * @sdev: scsi_device to unregister | |
712 | **/ | |
713 | void scsi_remove_device(struct scsi_device *sdev) | |
714 | { | |
54195002 AS |
715 | struct Scsi_Host *shost = sdev->host; |
716 | ||
717 | down(&shost->scan_mutex); | |
903f4fed | 718 | __scsi_remove_device(sdev); |
54195002 | 719 | up(&shost->scan_mutex); |
1da177e4 LT |
720 | } |
721 | EXPORT_SYMBOL(scsi_remove_device); | |
722 | ||
723 | void __scsi_remove_target(struct scsi_target *starget) | |
724 | { | |
725 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
726 | unsigned long flags; | |
a64358db | 727 | struct scsi_device *sdev; |
1da177e4 LT |
728 | |
729 | spin_lock_irqsave(shost->host_lock, flags); | |
730 | starget->reap_ref++; | |
a64358db AS |
731 | restart: |
732 | list_for_each_entry(sdev, &shost->__devices, siblings) { | |
1da177e4 | 733 | if (sdev->channel != starget->channel || |
a64358db AS |
734 | sdev->id != starget->id || |
735 | sdev->sdev_state == SDEV_DEL) | |
1da177e4 LT |
736 | continue; |
737 | spin_unlock_irqrestore(shost->host_lock, flags); | |
738 | scsi_remove_device(sdev); | |
739 | spin_lock_irqsave(shost->host_lock, flags); | |
a64358db | 740 | goto restart; |
1da177e4 LT |
741 | } |
742 | spin_unlock_irqrestore(shost->host_lock, flags); | |
743 | scsi_target_reap(starget); | |
744 | } | |
745 | ||
20b1e674 PM |
746 | static int __remove_child (struct device * dev, void * data) |
747 | { | |
748 | if (scsi_is_target_device(dev)) | |
749 | __scsi_remove_target(to_scsi_target(dev)); | |
750 | return 0; | |
751 | } | |
752 | ||
1da177e4 LT |
753 | /** |
754 | * scsi_remove_target - try to remove a target and all its devices | |
755 | * @dev: generic starget or parent of generic stargets to be removed | |
756 | * | |
757 | * Note: This is slightly racy. It is possible that if the user | |
758 | * requests the addition of another device then the target won't be | |
759 | * removed. | |
760 | */ | |
761 | void scsi_remove_target(struct device *dev) | |
762 | { | |
20b1e674 | 763 | struct device *rdev; |
1da177e4 LT |
764 | |
765 | if (scsi_is_target_device(dev)) { | |
766 | __scsi_remove_target(to_scsi_target(dev)); | |
767 | return; | |
768 | } | |
769 | ||
770 | rdev = get_device(dev); | |
20b1e674 | 771 | device_for_each_child(dev, NULL, __remove_child); |
1da177e4 LT |
772 | put_device(rdev); |
773 | } | |
774 | EXPORT_SYMBOL(scsi_remove_target); | |
775 | ||
776 | int scsi_register_driver(struct device_driver *drv) | |
777 | { | |
778 | drv->bus = &scsi_bus_type; | |
779 | ||
780 | return driver_register(drv); | |
781 | } | |
782 | EXPORT_SYMBOL(scsi_register_driver); | |
783 | ||
784 | int scsi_register_interface(struct class_interface *intf) | |
785 | { | |
786 | intf->class = &sdev_class; | |
787 | ||
788 | return class_interface_register(intf); | |
789 | } | |
790 | EXPORT_SYMBOL(scsi_register_interface); | |
791 | ||
792 | ||
793 | static struct class_device_attribute *class_attr_overridden( | |
794 | struct class_device_attribute **attrs, | |
795 | struct class_device_attribute *attr) | |
796 | { | |
797 | int i; | |
798 | ||
799 | if (!attrs) | |
800 | return NULL; | |
801 | for (i = 0; attrs[i]; i++) | |
802 | if (!strcmp(attrs[i]->attr.name, attr->attr.name)) | |
803 | return attrs[i]; | |
804 | return NULL; | |
805 | } | |
806 | ||
807 | static int class_attr_add(struct class_device *classdev, | |
808 | struct class_device_attribute *attr) | |
809 | { | |
810 | struct class_device_attribute *base_attr; | |
811 | ||
812 | /* | |
813 | * Spare the caller from having to copy things it's not interested in. | |
814 | */ | |
815 | base_attr = class_attr_overridden(scsi_sysfs_shost_attrs, attr); | |
816 | if (base_attr) { | |
817 | /* extend permissions */ | |
818 | attr->attr.mode |= base_attr->attr.mode; | |
819 | ||
820 | /* override null show/store with default */ | |
821 | if (!attr->show) | |
822 | attr->show = base_attr->show; | |
823 | if (!attr->store) | |
824 | attr->store = base_attr->store; | |
825 | } | |
826 | ||
827 | return class_device_create_file(classdev, attr); | |
828 | } | |
829 | ||
830 | /** | |
831 | * scsi_sysfs_add_host - add scsi host to subsystem | |
832 | * @shost: scsi host struct to add to subsystem | |
833 | * @dev: parent struct device pointer | |
834 | **/ | |
835 | int scsi_sysfs_add_host(struct Scsi_Host *shost) | |
836 | { | |
837 | int error, i; | |
838 | ||
839 | if (shost->hostt->shost_attrs) { | |
840 | for (i = 0; shost->hostt->shost_attrs[i]; i++) { | |
841 | error = class_attr_add(&shost->shost_classdev, | |
842 | shost->hostt->shost_attrs[i]); | |
843 | if (error) | |
844 | return error; | |
845 | } | |
846 | } | |
847 | ||
848 | for (i = 0; scsi_sysfs_shost_attrs[i]; i++) { | |
849 | if (!class_attr_overridden(shost->hostt->shost_attrs, | |
850 | scsi_sysfs_shost_attrs[i])) { | |
851 | error = class_device_create_file(&shost->shost_classdev, | |
852 | scsi_sysfs_shost_attrs[i]); | |
853 | if (error) | |
854 | return error; | |
855 | } | |
856 | } | |
857 | ||
858 | transport_register_device(&shost->shost_gendev); | |
859 | return 0; | |
860 | } | |
861 | ||
862 | void scsi_sysfs_device_initialize(struct scsi_device *sdev) | |
863 | { | |
864 | unsigned long flags; | |
865 | struct Scsi_Host *shost = sdev->host; | |
866 | struct scsi_target *starget = sdev->sdev_target; | |
867 | ||
868 | device_initialize(&sdev->sdev_gendev); | |
869 | sdev->sdev_gendev.bus = &scsi_bus_type; | |
870 | sdev->sdev_gendev.release = scsi_device_dev_release; | |
871 | sprintf(sdev->sdev_gendev.bus_id,"%d:%d:%d:%d", | |
872 | sdev->host->host_no, sdev->channel, sdev->id, | |
873 | sdev->lun); | |
874 | ||
875 | class_device_initialize(&sdev->sdev_classdev); | |
876 | sdev->sdev_classdev.dev = &sdev->sdev_gendev; | |
877 | sdev->sdev_classdev.class = &sdev_class; | |
878 | snprintf(sdev->sdev_classdev.class_id, BUS_ID_SIZE, | |
879 | "%d:%d:%d:%d", sdev->host->host_no, | |
880 | sdev->channel, sdev->id, sdev->lun); | |
881 | sdev->scsi_level = SCSI_2; | |
882 | transport_setup_device(&sdev->sdev_gendev); | |
883 | spin_lock_irqsave(shost->host_lock, flags); | |
884 | list_add_tail(&sdev->same_target_siblings, &starget->devices); | |
885 | list_add_tail(&sdev->siblings, &shost->__devices); | |
886 | spin_unlock_irqrestore(shost->host_lock, flags); | |
887 | } | |
888 | ||
889 | int scsi_is_sdev_device(const struct device *dev) | |
890 | { | |
891 | return dev->release == scsi_device_dev_release; | |
892 | } | |
893 | EXPORT_SYMBOL(scsi_is_sdev_device); | |
894 | ||
895 | /* A blank transport template that is used in drivers that don't | |
896 | * yet implement Transport Attributes */ | |
897 | struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |