Commit | Line | Data |
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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 JB |
189 | #define ENCLOSURE_NAME_SIZE 64 |
190 | ||
191 | static void enclosure_link_name(struct enclosure_component *cdev, char *name) | |
192 | { | |
193 | strcpy(name, "enclosure_device:"); | |
71610f55 | 194 | strcat(name, dev_name(&cdev->cdev)); |
cb6b7f40 JB |
195 | } |
196 | ||
197 | static void enclosure_remove_links(struct enclosure_component *cdev) | |
198 | { | |
199 | char name[ENCLOSURE_NAME_SIZE]; | |
200 | ||
201 | enclosure_link_name(cdev, name); | |
202 | sysfs_remove_link(&cdev->dev->kobj, name); | |
203 | sysfs_remove_link(&cdev->cdev.kobj, "device"); | |
204 | } | |
205 | ||
206 | static int enclosure_add_links(struct enclosure_component *cdev) | |
207 | { | |
208 | int error; | |
209 | char name[ENCLOSURE_NAME_SIZE]; | |
210 | ||
211 | error = sysfs_create_link(&cdev->cdev.kobj, &cdev->dev->kobj, "device"); | |
212 | if (error) | |
213 | return error; | |
214 | ||
215 | enclosure_link_name(cdev, name); | |
216 | error = sysfs_create_link(&cdev->dev->kobj, &cdev->cdev.kobj, name); | |
217 | if (error) | |
218 | sysfs_remove_link(&cdev->cdev.kobj, "device"); | |
219 | ||
220 | return error; | |
221 | } | |
222 | ||
ee959b00 | 223 | static void enclosure_release(struct device *cdev) |
d569d5bb JB |
224 | { |
225 | struct enclosure_device *edev = to_enclosure_device(cdev); | |
226 | ||
ee959b00 | 227 | put_device(cdev->parent); |
d569d5bb JB |
228 | kfree(edev); |
229 | } | |
230 | ||
ee959b00 | 231 | static void enclosure_component_release(struct device *dev) |
d569d5bb | 232 | { |
ee959b00 TJ |
233 | struct enclosure_component *cdev = to_enclosure_component(dev); |
234 | ||
cb6b7f40 JB |
235 | if (cdev->dev) { |
236 | enclosure_remove_links(cdev); | |
237 | put_device(cdev->dev); | |
238 | } | |
ee959b00 | 239 | put_device(dev->parent); |
d569d5bb JB |
240 | } |
241 | ||
a4dbd674 | 242 | static const struct attribute_group *enclosure_groups[]; |
cb6b7f40 | 243 | |
d569d5bb JB |
244 | /** |
245 | * enclosure_component_register - add a particular component to an enclosure | |
246 | * @edev: the enclosure to add the component | |
247 | * @num: the device number | |
248 | * @type: the type of component being added | |
249 | * @name: an optional name to appear in sysfs (leave NULL if none) | |
250 | * | |
251 | * Registers the component. The name is optional for enclosures that | |
252 | * give their components a unique name. If not, leave the field NULL | |
253 | * and a name will be assigned. | |
254 | * | |
255 | * Returns a pointer to the enclosure component or an error. | |
256 | */ | |
257 | struct enclosure_component * | |
258 | enclosure_component_register(struct enclosure_device *edev, | |
259 | unsigned int number, | |
260 | enum enclosure_component_type type, | |
261 | const char *name) | |
262 | { | |
263 | struct enclosure_component *ecomp; | |
ee959b00 | 264 | struct device *cdev; |
d569d5bb JB |
265 | int err; |
266 | ||
267 | if (number >= edev->components) | |
268 | return ERR_PTR(-EINVAL); | |
269 | ||
270 | ecomp = &edev->component[number]; | |
271 | ||
272 | if (ecomp->number != -1) | |
273 | return ERR_PTR(-EINVAL); | |
274 | ||
275 | ecomp->type = type; | |
276 | ecomp->number = number; | |
277 | cdev = &ecomp->cdev; | |
ee959b00 | 278 | cdev->parent = get_device(&edev->edev); |
5e43754f YL |
279 | if (name && name[0]) |
280 | dev_set_name(cdev, "%s", name); | |
d569d5bb | 281 | else |
71610f55 | 282 | dev_set_name(cdev, "%u", number); |
d569d5bb | 283 | |
cb6b7f40 JB |
284 | cdev->release = enclosure_component_release; |
285 | cdev->groups = enclosure_groups; | |
286 | ||
ee959b00 | 287 | err = device_register(cdev); |
d569d5bb JB |
288 | if (err) |
289 | ERR_PTR(err); | |
290 | ||
291 | return ecomp; | |
292 | } | |
293 | EXPORT_SYMBOL_GPL(enclosure_component_register); | |
294 | ||
295 | /** | |
296 | * enclosure_add_device - add a device as being part of an enclosure | |
297 | * @edev: the enclosure device being added to. | |
298 | * @num: the number of the component | |
299 | * @dev: the device being added | |
300 | * | |
301 | * Declares a real device to reside in slot (or identifier) @num of an | |
302 | * enclosure. This will cause the relevant sysfs links to appear. | |
303 | * This function may also be used to change a device associated with | |
304 | * an enclosure without having to call enclosure_remove_device() in | |
305 | * between. | |
306 | * | |
307 | * Returns zero on success or an error. | |
308 | */ | |
309 | int enclosure_add_device(struct enclosure_device *edev, int component, | |
310 | struct device *dev) | |
311 | { | |
ee959b00 | 312 | struct enclosure_component *cdev; |
d569d5bb JB |
313 | |
314 | if (!edev || component >= edev->components) | |
315 | return -EINVAL; | |
316 | ||
ee959b00 | 317 | cdev = &edev->component[component]; |
d569d5bb | 318 | |
21fab1d0 JB |
319 | if (cdev->dev == dev) |
320 | return -EEXIST; | |
321 | ||
cb6b7f40 JB |
322 | if (cdev->dev) |
323 | enclosure_remove_links(cdev); | |
324 | ||
ee959b00 | 325 | put_device(cdev->dev); |
d569d5bb | 326 | cdev->dev = get_device(dev); |
cb6b7f40 | 327 | return enclosure_add_links(cdev); |
d569d5bb JB |
328 | } |
329 | EXPORT_SYMBOL_GPL(enclosure_add_device); | |
330 | ||
331 | /** | |
332 | * enclosure_remove_device - remove a device from an enclosure | |
333 | * @edev: the enclosure device | |
334 | * @num: the number of the component to remove | |
335 | * | |
336 | * Returns zero on success or an error. | |
337 | * | |
338 | */ | |
43d8eb9c | 339 | int enclosure_remove_device(struct enclosure_device *edev, struct device *dev) |
d569d5bb | 340 | { |
ee959b00 | 341 | struct enclosure_component *cdev; |
43d8eb9c | 342 | int i; |
d569d5bb | 343 | |
43d8eb9c | 344 | if (!edev || !dev) |
d569d5bb JB |
345 | return -EINVAL; |
346 | ||
43d8eb9c JB |
347 | for (i = 0; i < edev->components; i++) { |
348 | cdev = &edev->component[i]; | |
349 | if (cdev->dev == dev) { | |
350 | enclosure_remove_links(cdev); | |
351 | device_del(&cdev->cdev); | |
352 | put_device(dev); | |
353 | cdev->dev = NULL; | |
354 | return device_add(&cdev->cdev); | |
355 | } | |
356 | } | |
357 | return -ENODEV; | |
d569d5bb JB |
358 | } |
359 | EXPORT_SYMBOL_GPL(enclosure_remove_device); | |
360 | ||
361 | /* | |
362 | * sysfs pieces below | |
363 | */ | |
364 | ||
ee959b00 TJ |
365 | static ssize_t enclosure_show_components(struct device *cdev, |
366 | struct device_attribute *attr, | |
367 | char *buf) | |
d569d5bb JB |
368 | { |
369 | struct enclosure_device *edev = to_enclosure_device(cdev); | |
370 | ||
371 | return snprintf(buf, 40, "%d\n", edev->components); | |
372 | } | |
373 | ||
ee959b00 | 374 | static struct device_attribute enclosure_attrs[] = { |
d569d5bb JB |
375 | __ATTR(components, S_IRUGO, enclosure_show_components, NULL), |
376 | __ATTR_NULL | |
377 | }; | |
378 | ||
379 | static struct class enclosure_class = { | |
380 | .name = "enclosure", | |
381 | .owner = THIS_MODULE, | |
ee959b00 TJ |
382 | .dev_release = enclosure_release, |
383 | .dev_attrs = enclosure_attrs, | |
d569d5bb JB |
384 | }; |
385 | ||
386 | static const char *const enclosure_status [] = { | |
387 | [ENCLOSURE_STATUS_UNSUPPORTED] = "unsupported", | |
388 | [ENCLOSURE_STATUS_OK] = "OK", | |
389 | [ENCLOSURE_STATUS_CRITICAL] = "critical", | |
390 | [ENCLOSURE_STATUS_NON_CRITICAL] = "non-critical", | |
391 | [ENCLOSURE_STATUS_UNRECOVERABLE] = "unrecoverable", | |
392 | [ENCLOSURE_STATUS_NOT_INSTALLED] = "not installed", | |
393 | [ENCLOSURE_STATUS_UNKNOWN] = "unknown", | |
394 | [ENCLOSURE_STATUS_UNAVAILABLE] = "unavailable", | |
cc9b2e9f | 395 | [ENCLOSURE_STATUS_MAX] = NULL, |
d569d5bb JB |
396 | }; |
397 | ||
398 | static const char *const enclosure_type [] = { | |
399 | [ENCLOSURE_COMPONENT_DEVICE] = "device", | |
400 | [ENCLOSURE_COMPONENT_ARRAY_DEVICE] = "array device", | |
401 | }; | |
402 | ||
ee959b00 TJ |
403 | static ssize_t get_component_fault(struct device *cdev, |
404 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
405 | { |
406 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
407 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
408 | ||
409 | if (edev->cb->get_fault) | |
410 | edev->cb->get_fault(edev, ecomp); | |
411 | return snprintf(buf, 40, "%d\n", ecomp->fault); | |
412 | } | |
413 | ||
ee959b00 TJ |
414 | static ssize_t set_component_fault(struct device *cdev, |
415 | struct device_attribute *attr, | |
416 | const char *buf, size_t count) | |
d569d5bb JB |
417 | { |
418 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
419 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
420 | int val = simple_strtoul(buf, NULL, 0); | |
421 | ||
422 | if (edev->cb->set_fault) | |
423 | edev->cb->set_fault(edev, ecomp, val); | |
424 | return count; | |
425 | } | |
426 | ||
ee959b00 TJ |
427 | static ssize_t get_component_status(struct device *cdev, |
428 | struct device_attribute *attr,char *buf) | |
d569d5bb JB |
429 | { |
430 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
431 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
432 | ||
433 | if (edev->cb->get_status) | |
434 | edev->cb->get_status(edev, ecomp); | |
435 | return snprintf(buf, 40, "%s\n", enclosure_status[ecomp->status]); | |
436 | } | |
437 | ||
ee959b00 TJ |
438 | static ssize_t set_component_status(struct device *cdev, |
439 | struct device_attribute *attr, | |
440 | const char *buf, size_t count) | |
d569d5bb JB |
441 | { |
442 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
443 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
444 | int i; | |
445 | ||
446 | for (i = 0; enclosure_status[i]; i++) { | |
447 | if (strncmp(buf, enclosure_status[i], | |
448 | strlen(enclosure_status[i])) == 0 && | |
449 | (buf[strlen(enclosure_status[i])] == '\n' || | |
450 | buf[strlen(enclosure_status[i])] == '\0')) | |
451 | break; | |
452 | } | |
453 | ||
454 | if (enclosure_status[i] && edev->cb->set_status) { | |
455 | edev->cb->set_status(edev, ecomp, i); | |
456 | return count; | |
457 | } else | |
458 | return -EINVAL; | |
459 | } | |
460 | ||
ee959b00 TJ |
461 | static ssize_t get_component_active(struct device *cdev, |
462 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
463 | { |
464 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
465 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
466 | ||
467 | if (edev->cb->get_active) | |
468 | edev->cb->get_active(edev, ecomp); | |
469 | return snprintf(buf, 40, "%d\n", ecomp->active); | |
470 | } | |
471 | ||
ee959b00 TJ |
472 | static ssize_t set_component_active(struct device *cdev, |
473 | struct device_attribute *attr, | |
474 | const char *buf, size_t count) | |
d569d5bb JB |
475 | { |
476 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
477 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
478 | int val = simple_strtoul(buf, NULL, 0); | |
479 | ||
480 | if (edev->cb->set_active) | |
481 | edev->cb->set_active(edev, ecomp, val); | |
482 | return count; | |
483 | } | |
484 | ||
ee959b00 TJ |
485 | static ssize_t get_component_locate(struct device *cdev, |
486 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
487 | { |
488 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
489 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
490 | ||
491 | if (edev->cb->get_locate) | |
492 | edev->cb->get_locate(edev, ecomp); | |
493 | return snprintf(buf, 40, "%d\n", ecomp->locate); | |
494 | } | |
495 | ||
ee959b00 TJ |
496 | static ssize_t set_component_locate(struct device *cdev, |
497 | struct device_attribute *attr, | |
498 | const char *buf, size_t count) | |
d569d5bb JB |
499 | { |
500 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
501 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
502 | int val = simple_strtoul(buf, NULL, 0); | |
503 | ||
504 | if (edev->cb->set_locate) | |
505 | edev->cb->set_locate(edev, ecomp, val); | |
506 | return count; | |
507 | } | |
508 | ||
ee959b00 TJ |
509 | static ssize_t get_component_type(struct device *cdev, |
510 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
511 | { |
512 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
513 | ||
514 | return snprintf(buf, 40, "%s\n", enclosure_type[ecomp->type]); | |
515 | } | |
516 | ||
517 | ||
cb6b7f40 JB |
518 | static DEVICE_ATTR(fault, S_IRUGO | S_IWUSR, get_component_fault, |
519 | set_component_fault); | |
520 | static DEVICE_ATTR(status, S_IRUGO | S_IWUSR, get_component_status, | |
521 | set_component_status); | |
522 | static DEVICE_ATTR(active, S_IRUGO | S_IWUSR, get_component_active, | |
523 | set_component_active); | |
524 | static DEVICE_ATTR(locate, S_IRUGO | S_IWUSR, get_component_locate, | |
525 | set_component_locate); | |
526 | static DEVICE_ATTR(type, S_IRUGO, get_component_type, NULL); | |
527 | ||
528 | static struct attribute *enclosure_component_attrs[] = { | |
529 | &dev_attr_fault.attr, | |
530 | &dev_attr_status.attr, | |
531 | &dev_attr_active.attr, | |
532 | &dev_attr_locate.attr, | |
533 | &dev_attr_type.attr, | |
534 | NULL | |
d569d5bb JB |
535 | }; |
536 | ||
cb6b7f40 JB |
537 | static struct attribute_group enclosure_group = { |
538 | .attrs = enclosure_component_attrs, | |
539 | }; | |
540 | ||
a4dbd674 | 541 | static const struct attribute_group *enclosure_groups[] = { |
cb6b7f40 JB |
542 | &enclosure_group, |
543 | NULL | |
d569d5bb JB |
544 | }; |
545 | ||
546 | static int __init enclosure_init(void) | |
547 | { | |
548 | int err; | |
549 | ||
550 | err = class_register(&enclosure_class); | |
551 | if (err) | |
552 | return err; | |
d569d5bb JB |
553 | |
554 | return 0; | |
d569d5bb JB |
555 | } |
556 | ||
557 | static void __exit enclosure_exit(void) | |
558 | { | |
d569d5bb JB |
559 | class_unregister(&enclosure_class); |
560 | } | |
561 | ||
562 | module_init(enclosure_init); | |
563 | module_exit(enclosure_exit); | |
564 | ||
565 | MODULE_AUTHOR("James Bottomley"); | |
566 | MODULE_DESCRIPTION("Enclosure Services"); | |
567 | MODULE_LICENSE("GPL v2"); |