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d569d5bb JB |
1 | /* |
2 | * Enclosure Services | |
3 | * | |
4 | * Copyright (C) 2008 James Bottomley <James.Bottomley@HansenPartnership.com> | |
5 | * | |
6 | **----------------------------------------------------------------------------- | |
7 | ** | |
8 | ** This program is free software; you can redistribute it and/or | |
9 | ** modify it under the terms of the GNU General Public License | |
10 | ** version 2 as published by the Free Software Foundation. | |
11 | ** | |
12 | ** This program is distributed in the hope that it will be useful, | |
13 | ** but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | ** GNU General Public License for more details. | |
16 | ** | |
17 | ** You should have received a copy of the GNU General Public License | |
18 | ** along with this program; if not, write to the Free Software | |
19 | ** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
20 | ** | |
21 | **----------------------------------------------------------------------------- | |
22 | */ | |
23 | #include <linux/device.h> | |
24 | #include <linux/enclosure.h> | |
25 | #include <linux/err.h> | |
26 | #include <linux/list.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/mutex.h> | |
5a0e3ad6 | 30 | #include <linux/slab.h> |
d569d5bb JB |
31 | |
32 | static LIST_HEAD(container_list); | |
33 | static DEFINE_MUTEX(container_list_lock); | |
34 | static struct class enclosure_class; | |
d569d5bb JB |
35 | |
36 | /** | |
163f52b6 JB |
37 | * enclosure_find - find an enclosure given a parent device |
38 | * @dev: the parent to match against | |
39 | * @start: Optional enclosure device to start from (NULL if none) | |
d569d5bb | 40 | * |
163f52b6 JB |
41 | * Looks through the list of registered enclosures to find all those |
42 | * with @dev as a parent. Returns NULL if no enclosure is | |
43 | * found. @start can be used as a starting point to obtain multiple | |
44 | * enclosures per parent (should begin with NULL and then be set to | |
45 | * each returned enclosure device). Obtains a reference to the | |
46 | * enclosure class device which must be released with device_put(). | |
47 | * If @start is not NULL, a reference must be taken on it which is | |
48 | * released before returning (this allows a loop through all | |
49 | * enclosures to exit with only the reference on the enclosure of | |
50 | * interest held). Note that the @dev may correspond to the actual | |
51 | * device housing the enclosure, in which case no iteration via @start | |
52 | * is required. | |
d569d5bb | 53 | */ |
163f52b6 JB |
54 | struct enclosure_device *enclosure_find(struct device *dev, |
55 | struct enclosure_device *start) | |
d569d5bb | 56 | { |
ee959b00 | 57 | struct enclosure_device *edev; |
d569d5bb JB |
58 | |
59 | mutex_lock(&container_list_lock); | |
163f52b6 JB |
60 | edev = list_prepare_entry(start, &container_list, node); |
61 | if (start) | |
62 | put_device(&start->edev); | |
63 | ||
64 | list_for_each_entry_continue(edev, &container_list, node) { | |
65 | struct device *parent = edev->edev.parent; | |
66 | /* parent might not be immediate, so iterate up to | |
67 | * the root of the tree if necessary */ | |
68 | while (parent) { | |
69 | if (parent == dev) { | |
70 | get_device(&edev->edev); | |
71 | mutex_unlock(&container_list_lock); | |
72 | return edev; | |
73 | } | |
74 | parent = parent->parent; | |
d569d5bb JB |
75 | } |
76 | } | |
77 | mutex_unlock(&container_list_lock); | |
78 | ||
79 | return NULL; | |
80 | } | |
81 | EXPORT_SYMBOL_GPL(enclosure_find); | |
82 | ||
83 | /** | |
84 | * enclosure_for_each_device - calls a function for each enclosure | |
85 | * @fn: the function to call | |
86 | * @data: the data to pass to each call | |
87 | * | |
88 | * Loops over all the enclosures calling the function. | |
89 | * | |
90 | * Note, this function uses a mutex which will be held across calls to | |
91 | * @fn, so it must have non atomic context, and @fn may (although it | |
92 | * should not) sleep or otherwise cause the mutex to be held for | |
93 | * indefinite periods | |
94 | */ | |
95 | int enclosure_for_each_device(int (*fn)(struct enclosure_device *, void *), | |
96 | void *data) | |
97 | { | |
98 | int error = 0; | |
99 | struct enclosure_device *edev; | |
100 | ||
101 | mutex_lock(&container_list_lock); | |
102 | list_for_each_entry(edev, &container_list, node) { | |
103 | error = fn(edev, data); | |
104 | if (error) | |
105 | break; | |
106 | } | |
107 | mutex_unlock(&container_list_lock); | |
108 | ||
109 | return error; | |
110 | } | |
111 | EXPORT_SYMBOL_GPL(enclosure_for_each_device); | |
112 | ||
113 | /** | |
114 | * enclosure_register - register device as an enclosure | |
115 | * | |
116 | * @dev: device containing the enclosure | |
117 | * @components: number of components in the enclosure | |
118 | * | |
119 | * This sets up the device for being an enclosure. Note that @dev does | |
120 | * not have to be a dedicated enclosure device. It may be some other type | |
121 | * of device that additionally responds to enclosure services | |
122 | */ | |
123 | struct enclosure_device * | |
124 | enclosure_register(struct device *dev, const char *name, int components, | |
125 | struct enclosure_component_callbacks *cb) | |
126 | { | |
127 | struct enclosure_device *edev = | |
128 | kzalloc(sizeof(struct enclosure_device) + | |
129 | sizeof(struct enclosure_component)*components, | |
130 | GFP_KERNEL); | |
131 | int err, i; | |
132 | ||
133 | BUG_ON(!cb); | |
134 | ||
135 | if (!edev) | |
136 | return ERR_PTR(-ENOMEM); | |
137 | ||
138 | edev->components = components; | |
139 | ||
ee959b00 TJ |
140 | edev->edev.class = &enclosure_class; |
141 | edev->edev.parent = get_device(dev); | |
d569d5bb | 142 | edev->cb = cb; |
5e43754f | 143 | dev_set_name(&edev->edev, "%s", name); |
ee959b00 | 144 | err = device_register(&edev->edev); |
d569d5bb JB |
145 | if (err) |
146 | goto err; | |
147 | ||
148 | for (i = 0; i < components; i++) | |
149 | edev->component[i].number = -1; | |
150 | ||
151 | mutex_lock(&container_list_lock); | |
152 | list_add_tail(&edev->node, &container_list); | |
153 | mutex_unlock(&container_list_lock); | |
154 | ||
155 | return edev; | |
156 | ||
157 | err: | |
ee959b00 | 158 | put_device(edev->edev.parent); |
d569d5bb JB |
159 | kfree(edev); |
160 | return ERR_PTR(err); | |
161 | } | |
162 | EXPORT_SYMBOL_GPL(enclosure_register); | |
163 | ||
164 | static struct enclosure_component_callbacks enclosure_null_callbacks; | |
165 | ||
166 | /** | |
167 | * enclosure_unregister - remove an enclosure | |
168 | * | |
169 | * @edev: the registered enclosure to remove; | |
170 | */ | |
171 | void enclosure_unregister(struct enclosure_device *edev) | |
172 | { | |
173 | int i; | |
174 | ||
175 | mutex_lock(&container_list_lock); | |
176 | list_del(&edev->node); | |
177 | mutex_unlock(&container_list_lock); | |
178 | ||
179 | for (i = 0; i < edev->components; i++) | |
180 | if (edev->component[i].number != -1) | |
ee959b00 | 181 | device_unregister(&edev->component[i].cdev); |
d569d5bb JB |
182 | |
183 | /* prevent any callbacks into service user */ | |
184 | edev->cb = &enclosure_null_callbacks; | |
ee959b00 | 185 | device_unregister(&edev->edev); |
d569d5bb JB |
186 | } |
187 | EXPORT_SYMBOL_GPL(enclosure_unregister); | |
188 | ||
cb6b7f40 | 189 | #define ENCLOSURE_NAME_SIZE 64 |
d2fd76e6 | 190 | #define COMPONENT_NAME_SIZE 64 |
cb6b7f40 JB |
191 | |
192 | static void enclosure_link_name(struct enclosure_component *cdev, char *name) | |
193 | { | |
194 | strcpy(name, "enclosure_device:"); | |
71610f55 | 195 | strcat(name, dev_name(&cdev->cdev)); |
cb6b7f40 JB |
196 | } |
197 | ||
198 | static void enclosure_remove_links(struct enclosure_component *cdev) | |
199 | { | |
200 | char name[ENCLOSURE_NAME_SIZE]; | |
201 | ||
a1470c7b JB |
202 | /* |
203 | * In odd circumstances, like multipath devices, something else may | |
204 | * already have removed the links, so check for this condition first. | |
205 | */ | |
206 | if (!cdev->dev->kobj.sd) | |
207 | return; | |
208 | ||
cb6b7f40 JB |
209 | enclosure_link_name(cdev, name); |
210 | sysfs_remove_link(&cdev->dev->kobj, name); | |
211 | sysfs_remove_link(&cdev->cdev.kobj, "device"); | |
212 | } | |
213 | ||
214 | static int enclosure_add_links(struct enclosure_component *cdev) | |
215 | { | |
216 | int error; | |
217 | char name[ENCLOSURE_NAME_SIZE]; | |
218 | ||
219 | error = sysfs_create_link(&cdev->cdev.kobj, &cdev->dev->kobj, "device"); | |
220 | if (error) | |
221 | return error; | |
222 | ||
223 | enclosure_link_name(cdev, name); | |
224 | error = sysfs_create_link(&cdev->dev->kobj, &cdev->cdev.kobj, name); | |
225 | if (error) | |
226 | sysfs_remove_link(&cdev->cdev.kobj, "device"); | |
227 | ||
228 | return error; | |
229 | } | |
230 | ||
ee959b00 | 231 | static void enclosure_release(struct device *cdev) |
d569d5bb JB |
232 | { |
233 | struct enclosure_device *edev = to_enclosure_device(cdev); | |
234 | ||
ee959b00 | 235 | put_device(cdev->parent); |
d569d5bb JB |
236 | kfree(edev); |
237 | } | |
238 | ||
ee959b00 | 239 | static void enclosure_component_release(struct device *dev) |
d569d5bb | 240 | { |
ee959b00 TJ |
241 | struct enclosure_component *cdev = to_enclosure_component(dev); |
242 | ||
cb6b7f40 JB |
243 | if (cdev->dev) { |
244 | enclosure_remove_links(cdev); | |
245 | put_device(cdev->dev); | |
246 | } | |
ee959b00 | 247 | put_device(dev->parent); |
d569d5bb JB |
248 | } |
249 | ||
d2fd76e6 MS |
250 | static struct enclosure_component * |
251 | enclosure_component_find_by_name(struct enclosure_device *edev, | |
252 | const char *name) | |
253 | { | |
254 | int i; | |
255 | const char *cname; | |
256 | struct enclosure_component *ecomp; | |
257 | ||
258 | if (!edev || !name || !name[0]) | |
259 | return NULL; | |
260 | ||
261 | for (i = 0; i < edev->components; i++) { | |
262 | ecomp = &edev->component[i]; | |
263 | cname = dev_name(&ecomp->cdev); | |
264 | if (ecomp->number != -1 && | |
265 | cname && cname[0] && | |
266 | !strcmp(cname, name)) | |
267 | return ecomp; | |
268 | } | |
269 | ||
270 | return NULL; | |
271 | } | |
272 | ||
899826f1 | 273 | static const struct attribute_group *enclosure_component_groups[]; |
cb6b7f40 | 274 | |
d569d5bb JB |
275 | /** |
276 | * enclosure_component_register - add a particular component to an enclosure | |
277 | * @edev: the enclosure to add the component | |
278 | * @num: the device number | |
279 | * @type: the type of component being added | |
280 | * @name: an optional name to appear in sysfs (leave NULL if none) | |
281 | * | |
282 | * Registers the component. The name is optional for enclosures that | |
283 | * give their components a unique name. If not, leave the field NULL | |
284 | * and a name will be assigned. | |
285 | * | |
286 | * Returns a pointer to the enclosure component or an error. | |
287 | */ | |
288 | struct enclosure_component * | |
289 | enclosure_component_register(struct enclosure_device *edev, | |
290 | unsigned int number, | |
291 | enum enclosure_component_type type, | |
292 | const char *name) | |
293 | { | |
294 | struct enclosure_component *ecomp; | |
ee959b00 | 295 | struct device *cdev; |
d2fd76e6 MS |
296 | int err, i; |
297 | char newname[COMPONENT_NAME_SIZE]; | |
d569d5bb JB |
298 | |
299 | if (number >= edev->components) | |
300 | return ERR_PTR(-EINVAL); | |
301 | ||
302 | ecomp = &edev->component[number]; | |
303 | ||
304 | if (ecomp->number != -1) | |
305 | return ERR_PTR(-EINVAL); | |
306 | ||
307 | ecomp->type = type; | |
308 | ecomp->number = number; | |
309 | cdev = &ecomp->cdev; | |
ee959b00 | 310 | cdev->parent = get_device(&edev->edev); |
d2fd76e6 MS |
311 | |
312 | if (name && name[0]) { | |
313 | /* Some hardware (e.g. enclosure in RX300 S6) has components | |
314 | * with non unique names. Registering duplicates in sysfs | |
315 | * will lead to warnings during bootup. So make the names | |
316 | * unique by appending consecutive numbers -1, -2, ... */ | |
317 | i = 1; | |
318 | snprintf(newname, COMPONENT_NAME_SIZE, | |
319 | "%s", name); | |
320 | while (enclosure_component_find_by_name(edev, newname)) | |
321 | snprintf(newname, COMPONENT_NAME_SIZE, | |
322 | "%s-%i", name, i++); | |
323 | dev_set_name(cdev, "%s", newname); | |
324 | } else | |
71610f55 | 325 | dev_set_name(cdev, "%u", number); |
d569d5bb | 326 | |
cb6b7f40 | 327 | cdev->release = enclosure_component_release; |
899826f1 | 328 | cdev->groups = enclosure_component_groups; |
cb6b7f40 | 329 | |
ee959b00 | 330 | err = device_register(cdev); |
a91c1be2 JB |
331 | if (err) { |
332 | ecomp->number = -1; | |
333 | put_device(cdev); | |
334 | return ERR_PTR(err); | |
335 | } | |
d569d5bb JB |
336 | |
337 | return ecomp; | |
338 | } | |
339 | EXPORT_SYMBOL_GPL(enclosure_component_register); | |
340 | ||
341 | /** | |
342 | * enclosure_add_device - add a device as being part of an enclosure | |
343 | * @edev: the enclosure device being added to. | |
344 | * @num: the number of the component | |
345 | * @dev: the device being added | |
346 | * | |
347 | * Declares a real device to reside in slot (or identifier) @num of an | |
348 | * enclosure. This will cause the relevant sysfs links to appear. | |
349 | * This function may also be used to change a device associated with | |
350 | * an enclosure without having to call enclosure_remove_device() in | |
351 | * between. | |
352 | * | |
353 | * Returns zero on success or an error. | |
354 | */ | |
355 | int enclosure_add_device(struct enclosure_device *edev, int component, | |
356 | struct device *dev) | |
357 | { | |
ee959b00 | 358 | struct enclosure_component *cdev; |
d569d5bb JB |
359 | |
360 | if (!edev || component >= edev->components) | |
361 | return -EINVAL; | |
362 | ||
ee959b00 | 363 | cdev = &edev->component[component]; |
d569d5bb | 364 | |
21fab1d0 JB |
365 | if (cdev->dev == dev) |
366 | return -EEXIST; | |
367 | ||
cb6b7f40 JB |
368 | if (cdev->dev) |
369 | enclosure_remove_links(cdev); | |
370 | ||
ee959b00 | 371 | put_device(cdev->dev); |
d569d5bb | 372 | cdev->dev = get_device(dev); |
cb6b7f40 | 373 | return enclosure_add_links(cdev); |
d569d5bb JB |
374 | } |
375 | EXPORT_SYMBOL_GPL(enclosure_add_device); | |
376 | ||
377 | /** | |
378 | * enclosure_remove_device - remove a device from an enclosure | |
379 | * @edev: the enclosure device | |
380 | * @num: the number of the component to remove | |
381 | * | |
382 | * Returns zero on success or an error. | |
383 | * | |
384 | */ | |
43d8eb9c | 385 | int enclosure_remove_device(struct enclosure_device *edev, struct device *dev) |
d569d5bb | 386 | { |
ee959b00 | 387 | struct enclosure_component *cdev; |
43d8eb9c | 388 | int i; |
d569d5bb | 389 | |
43d8eb9c | 390 | if (!edev || !dev) |
d569d5bb JB |
391 | return -EINVAL; |
392 | ||
43d8eb9c JB |
393 | for (i = 0; i < edev->components; i++) { |
394 | cdev = &edev->component[i]; | |
395 | if (cdev->dev == dev) { | |
396 | enclosure_remove_links(cdev); | |
397 | device_del(&cdev->cdev); | |
398 | put_device(dev); | |
399 | cdev->dev = NULL; | |
400 | return device_add(&cdev->cdev); | |
401 | } | |
402 | } | |
403 | return -ENODEV; | |
d569d5bb JB |
404 | } |
405 | EXPORT_SYMBOL_GPL(enclosure_remove_device); | |
406 | ||
407 | /* | |
408 | * sysfs pieces below | |
409 | */ | |
410 | ||
899826f1 GKH |
411 | static ssize_t components_show(struct device *cdev, |
412 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
413 | { |
414 | struct enclosure_device *edev = to_enclosure_device(cdev); | |
415 | ||
416 | return snprintf(buf, 40, "%d\n", edev->components); | |
417 | } | |
899826f1 | 418 | static DEVICE_ATTR_RO(components); |
d569d5bb | 419 | |
899826f1 GKH |
420 | static struct attribute *enclosure_class_attrs[] = { |
421 | &dev_attr_components.attr, | |
422 | NULL, | |
d569d5bb | 423 | }; |
899826f1 | 424 | ATTRIBUTE_GROUPS(enclosure_class); |
d569d5bb JB |
425 | |
426 | static struct class enclosure_class = { | |
427 | .name = "enclosure", | |
428 | .owner = THIS_MODULE, | |
ee959b00 | 429 | .dev_release = enclosure_release, |
899826f1 | 430 | .dev_groups = enclosure_class_groups, |
d569d5bb JB |
431 | }; |
432 | ||
433 | static const char *const enclosure_status [] = { | |
434 | [ENCLOSURE_STATUS_UNSUPPORTED] = "unsupported", | |
435 | [ENCLOSURE_STATUS_OK] = "OK", | |
436 | [ENCLOSURE_STATUS_CRITICAL] = "critical", | |
437 | [ENCLOSURE_STATUS_NON_CRITICAL] = "non-critical", | |
438 | [ENCLOSURE_STATUS_UNRECOVERABLE] = "unrecoverable", | |
439 | [ENCLOSURE_STATUS_NOT_INSTALLED] = "not installed", | |
440 | [ENCLOSURE_STATUS_UNKNOWN] = "unknown", | |
441 | [ENCLOSURE_STATUS_UNAVAILABLE] = "unavailable", | |
cc9b2e9f | 442 | [ENCLOSURE_STATUS_MAX] = NULL, |
d569d5bb JB |
443 | }; |
444 | ||
445 | static const char *const enclosure_type [] = { | |
446 | [ENCLOSURE_COMPONENT_DEVICE] = "device", | |
447 | [ENCLOSURE_COMPONENT_ARRAY_DEVICE] = "array device", | |
448 | }; | |
449 | ||
ee959b00 TJ |
450 | static ssize_t get_component_fault(struct device *cdev, |
451 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
452 | { |
453 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
454 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
455 | ||
456 | if (edev->cb->get_fault) | |
457 | edev->cb->get_fault(edev, ecomp); | |
458 | return snprintf(buf, 40, "%d\n", ecomp->fault); | |
459 | } | |
460 | ||
ee959b00 TJ |
461 | static ssize_t set_component_fault(struct device *cdev, |
462 | struct device_attribute *attr, | |
463 | const char *buf, size_t count) | |
d569d5bb JB |
464 | { |
465 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
466 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
467 | int val = simple_strtoul(buf, NULL, 0); | |
468 | ||
469 | if (edev->cb->set_fault) | |
470 | edev->cb->set_fault(edev, ecomp, val); | |
471 | return count; | |
472 | } | |
473 | ||
ee959b00 TJ |
474 | static ssize_t get_component_status(struct device *cdev, |
475 | struct device_attribute *attr,char *buf) | |
d569d5bb JB |
476 | { |
477 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
478 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
479 | ||
480 | if (edev->cb->get_status) | |
481 | edev->cb->get_status(edev, ecomp); | |
482 | return snprintf(buf, 40, "%s\n", enclosure_status[ecomp->status]); | |
483 | } | |
484 | ||
ee959b00 TJ |
485 | static ssize_t set_component_status(struct device *cdev, |
486 | struct device_attribute *attr, | |
487 | const char *buf, size_t count) | |
d569d5bb JB |
488 | { |
489 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
490 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
491 | int i; | |
492 | ||
493 | for (i = 0; enclosure_status[i]; i++) { | |
494 | if (strncmp(buf, enclosure_status[i], | |
495 | strlen(enclosure_status[i])) == 0 && | |
496 | (buf[strlen(enclosure_status[i])] == '\n' || | |
497 | buf[strlen(enclosure_status[i])] == '\0')) | |
498 | break; | |
499 | } | |
500 | ||
501 | if (enclosure_status[i] && edev->cb->set_status) { | |
502 | edev->cb->set_status(edev, ecomp, i); | |
503 | return count; | |
504 | } else | |
505 | return -EINVAL; | |
506 | } | |
507 | ||
ee959b00 TJ |
508 | static ssize_t get_component_active(struct device *cdev, |
509 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
510 | { |
511 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
512 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
513 | ||
514 | if (edev->cb->get_active) | |
515 | edev->cb->get_active(edev, ecomp); | |
516 | return snprintf(buf, 40, "%d\n", ecomp->active); | |
517 | } | |
518 | ||
ee959b00 TJ |
519 | static ssize_t set_component_active(struct device *cdev, |
520 | struct device_attribute *attr, | |
521 | const char *buf, size_t count) | |
d569d5bb JB |
522 | { |
523 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
524 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
525 | int val = simple_strtoul(buf, NULL, 0); | |
526 | ||
527 | if (edev->cb->set_active) | |
528 | edev->cb->set_active(edev, ecomp, val); | |
529 | return count; | |
530 | } | |
531 | ||
ee959b00 TJ |
532 | static ssize_t get_component_locate(struct device *cdev, |
533 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
534 | { |
535 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
536 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
537 | ||
538 | if (edev->cb->get_locate) | |
539 | edev->cb->get_locate(edev, ecomp); | |
540 | return snprintf(buf, 40, "%d\n", ecomp->locate); | |
541 | } | |
542 | ||
ee959b00 TJ |
543 | static ssize_t set_component_locate(struct device *cdev, |
544 | struct device_attribute *attr, | |
545 | const char *buf, size_t count) | |
d569d5bb JB |
546 | { |
547 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
548 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
549 | int val = simple_strtoul(buf, NULL, 0); | |
550 | ||
551 | if (edev->cb->set_locate) | |
552 | edev->cb->set_locate(edev, ecomp, val); | |
553 | return count; | |
554 | } | |
555 | ||
ee959b00 TJ |
556 | static ssize_t get_component_type(struct device *cdev, |
557 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
558 | { |
559 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
560 | ||
561 | return snprintf(buf, 40, "%s\n", enclosure_type[ecomp->type]); | |
562 | } | |
563 | ||
564 | ||
cb6b7f40 JB |
565 | static DEVICE_ATTR(fault, S_IRUGO | S_IWUSR, get_component_fault, |
566 | set_component_fault); | |
567 | static DEVICE_ATTR(status, S_IRUGO | S_IWUSR, get_component_status, | |
568 | set_component_status); | |
569 | static DEVICE_ATTR(active, S_IRUGO | S_IWUSR, get_component_active, | |
570 | set_component_active); | |
571 | static DEVICE_ATTR(locate, S_IRUGO | S_IWUSR, get_component_locate, | |
572 | set_component_locate); | |
573 | static DEVICE_ATTR(type, S_IRUGO, get_component_type, NULL); | |
574 | ||
575 | static struct attribute *enclosure_component_attrs[] = { | |
576 | &dev_attr_fault.attr, | |
577 | &dev_attr_status.attr, | |
578 | &dev_attr_active.attr, | |
579 | &dev_attr_locate.attr, | |
580 | &dev_attr_type.attr, | |
581 | NULL | |
d569d5bb | 582 | }; |
899826f1 | 583 | ATTRIBUTE_GROUPS(enclosure_component); |
d569d5bb JB |
584 | |
585 | static int __init enclosure_init(void) | |
586 | { | |
587 | int err; | |
588 | ||
589 | err = class_register(&enclosure_class); | |
590 | if (err) | |
591 | return err; | |
d569d5bb JB |
592 | |
593 | return 0; | |
d569d5bb JB |
594 | } |
595 | ||
596 | static void __exit enclosure_exit(void) | |
597 | { | |
d569d5bb JB |
598 | class_unregister(&enclosure_class); |
599 | } | |
600 | ||
601 | module_init(enclosure_init); | |
602 | module_exit(enclosure_exit); | |
603 | ||
604 | MODULE_AUTHOR("James Bottomley"); | |
605 | MODULE_DESCRIPTION("Enclosure Services"); | |
606 | MODULE_LICENSE("GPL v2"); |