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> | |
30 | ||
31 | static LIST_HEAD(container_list); | |
32 | static DEFINE_MUTEX(container_list_lock); | |
33 | static struct class enclosure_class; | |
d569d5bb JB |
34 | |
35 | /** | |
163f52b6 JB |
36 | * enclosure_find - find an enclosure given a parent device |
37 | * @dev: the parent to match against | |
38 | * @start: Optional enclosure device to start from (NULL if none) | |
d569d5bb | 39 | * |
163f52b6 JB |
40 | * Looks through the list of registered enclosures to find all those |
41 | * with @dev as a parent. Returns NULL if no enclosure is | |
42 | * found. @start can be used as a starting point to obtain multiple | |
43 | * enclosures per parent (should begin with NULL and then be set to | |
44 | * each returned enclosure device). Obtains a reference to the | |
45 | * enclosure class device which must be released with device_put(). | |
46 | * If @start is not NULL, a reference must be taken on it which is | |
47 | * released before returning (this allows a loop through all | |
48 | * enclosures to exit with only the reference on the enclosure of | |
49 | * interest held). Note that the @dev may correspond to the actual | |
50 | * device housing the enclosure, in which case no iteration via @start | |
51 | * is required. | |
d569d5bb | 52 | */ |
163f52b6 JB |
53 | struct enclosure_device *enclosure_find(struct device *dev, |
54 | struct enclosure_device *start) | |
d569d5bb | 55 | { |
ee959b00 | 56 | struct enclosure_device *edev; |
d569d5bb JB |
57 | |
58 | mutex_lock(&container_list_lock); | |
163f52b6 JB |
59 | edev = list_prepare_entry(start, &container_list, node); |
60 | if (start) | |
61 | put_device(&start->edev); | |
62 | ||
63 | list_for_each_entry_continue(edev, &container_list, node) { | |
64 | struct device *parent = edev->edev.parent; | |
65 | /* parent might not be immediate, so iterate up to | |
66 | * the root of the tree if necessary */ | |
67 | while (parent) { | |
68 | if (parent == dev) { | |
69 | get_device(&edev->edev); | |
70 | mutex_unlock(&container_list_lock); | |
71 | return edev; | |
72 | } | |
73 | parent = parent->parent; | |
d569d5bb JB |
74 | } |
75 | } | |
76 | mutex_unlock(&container_list_lock); | |
77 | ||
78 | return NULL; | |
79 | } | |
80 | EXPORT_SYMBOL_GPL(enclosure_find); | |
81 | ||
82 | /** | |
83 | * enclosure_for_each_device - calls a function for each enclosure | |
84 | * @fn: the function to call | |
85 | * @data: the data to pass to each call | |
86 | * | |
87 | * Loops over all the enclosures calling the function. | |
88 | * | |
89 | * Note, this function uses a mutex which will be held across calls to | |
90 | * @fn, so it must have non atomic context, and @fn may (although it | |
91 | * should not) sleep or otherwise cause the mutex to be held for | |
92 | * indefinite periods | |
93 | */ | |
94 | int enclosure_for_each_device(int (*fn)(struct enclosure_device *, void *), | |
95 | void *data) | |
96 | { | |
97 | int error = 0; | |
98 | struct enclosure_device *edev; | |
99 | ||
100 | mutex_lock(&container_list_lock); | |
101 | list_for_each_entry(edev, &container_list, node) { | |
102 | error = fn(edev, data); | |
103 | if (error) | |
104 | break; | |
105 | } | |
106 | mutex_unlock(&container_list_lock); | |
107 | ||
108 | return error; | |
109 | } | |
110 | EXPORT_SYMBOL_GPL(enclosure_for_each_device); | |
111 | ||
112 | /** | |
113 | * enclosure_register - register device as an enclosure | |
114 | * | |
115 | * @dev: device containing the enclosure | |
116 | * @components: number of components in the enclosure | |
117 | * | |
118 | * This sets up the device for being an enclosure. Note that @dev does | |
119 | * not have to be a dedicated enclosure device. It may be some other type | |
120 | * of device that additionally responds to enclosure services | |
121 | */ | |
122 | struct enclosure_device * | |
123 | enclosure_register(struct device *dev, const char *name, int components, | |
124 | struct enclosure_component_callbacks *cb) | |
125 | { | |
126 | struct enclosure_device *edev = | |
127 | kzalloc(sizeof(struct enclosure_device) + | |
128 | sizeof(struct enclosure_component)*components, | |
129 | GFP_KERNEL); | |
130 | int err, i; | |
131 | ||
132 | BUG_ON(!cb); | |
133 | ||
134 | if (!edev) | |
135 | return ERR_PTR(-ENOMEM); | |
136 | ||
137 | edev->components = components; | |
138 | ||
ee959b00 TJ |
139 | edev->edev.class = &enclosure_class; |
140 | edev->edev.parent = get_device(dev); | |
d569d5bb | 141 | edev->cb = cb; |
5e43754f | 142 | dev_set_name(&edev->edev, "%s", name); |
ee959b00 | 143 | err = device_register(&edev->edev); |
d569d5bb JB |
144 | if (err) |
145 | goto err; | |
146 | ||
147 | for (i = 0; i < components; i++) | |
148 | edev->component[i].number = -1; | |
149 | ||
150 | mutex_lock(&container_list_lock); | |
151 | list_add_tail(&edev->node, &container_list); | |
152 | mutex_unlock(&container_list_lock); | |
153 | ||
154 | return edev; | |
155 | ||
156 | err: | |
ee959b00 | 157 | put_device(edev->edev.parent); |
d569d5bb JB |
158 | kfree(edev); |
159 | return ERR_PTR(err); | |
160 | } | |
161 | EXPORT_SYMBOL_GPL(enclosure_register); | |
162 | ||
163 | static struct enclosure_component_callbacks enclosure_null_callbacks; | |
164 | ||
165 | /** | |
166 | * enclosure_unregister - remove an enclosure | |
167 | * | |
168 | * @edev: the registered enclosure to remove; | |
169 | */ | |
170 | void enclosure_unregister(struct enclosure_device *edev) | |
171 | { | |
172 | int i; | |
173 | ||
174 | mutex_lock(&container_list_lock); | |
175 | list_del(&edev->node); | |
176 | mutex_unlock(&container_list_lock); | |
177 | ||
178 | for (i = 0; i < edev->components; i++) | |
179 | if (edev->component[i].number != -1) | |
ee959b00 | 180 | device_unregister(&edev->component[i].cdev); |
d569d5bb JB |
181 | |
182 | /* prevent any callbacks into service user */ | |
183 | edev->cb = &enclosure_null_callbacks; | |
ee959b00 | 184 | device_unregister(&edev->edev); |
d569d5bb JB |
185 | } |
186 | EXPORT_SYMBOL_GPL(enclosure_unregister); | |
187 | ||
cb6b7f40 JB |
188 | #define ENCLOSURE_NAME_SIZE 64 |
189 | ||
190 | static void enclosure_link_name(struct enclosure_component *cdev, char *name) | |
191 | { | |
192 | strcpy(name, "enclosure_device:"); | |
71610f55 | 193 | strcat(name, dev_name(&cdev->cdev)); |
cb6b7f40 JB |
194 | } |
195 | ||
196 | static void enclosure_remove_links(struct enclosure_component *cdev) | |
197 | { | |
198 | char name[ENCLOSURE_NAME_SIZE]; | |
199 | ||
200 | enclosure_link_name(cdev, name); | |
201 | sysfs_remove_link(&cdev->dev->kobj, name); | |
202 | sysfs_remove_link(&cdev->cdev.kobj, "device"); | |
203 | } | |
204 | ||
205 | static int enclosure_add_links(struct enclosure_component *cdev) | |
206 | { | |
207 | int error; | |
208 | char name[ENCLOSURE_NAME_SIZE]; | |
209 | ||
210 | error = sysfs_create_link(&cdev->cdev.kobj, &cdev->dev->kobj, "device"); | |
211 | if (error) | |
212 | return error; | |
213 | ||
214 | enclosure_link_name(cdev, name); | |
215 | error = sysfs_create_link(&cdev->dev->kobj, &cdev->cdev.kobj, name); | |
216 | if (error) | |
217 | sysfs_remove_link(&cdev->cdev.kobj, "device"); | |
218 | ||
219 | return error; | |
220 | } | |
221 | ||
ee959b00 | 222 | static void enclosure_release(struct device *cdev) |
d569d5bb JB |
223 | { |
224 | struct enclosure_device *edev = to_enclosure_device(cdev); | |
225 | ||
ee959b00 | 226 | put_device(cdev->parent); |
d569d5bb JB |
227 | kfree(edev); |
228 | } | |
229 | ||
ee959b00 | 230 | static void enclosure_component_release(struct device *dev) |
d569d5bb | 231 | { |
ee959b00 TJ |
232 | struct enclosure_component *cdev = to_enclosure_component(dev); |
233 | ||
cb6b7f40 JB |
234 | if (cdev->dev) { |
235 | enclosure_remove_links(cdev); | |
236 | put_device(cdev->dev); | |
237 | } | |
ee959b00 | 238 | put_device(dev->parent); |
d569d5bb JB |
239 | } |
240 | ||
a4dbd674 | 241 | static const struct attribute_group *enclosure_groups[]; |
cb6b7f40 | 242 | |
d569d5bb JB |
243 | /** |
244 | * enclosure_component_register - add a particular component to an enclosure | |
245 | * @edev: the enclosure to add the component | |
246 | * @num: the device number | |
247 | * @type: the type of component being added | |
248 | * @name: an optional name to appear in sysfs (leave NULL if none) | |
249 | * | |
250 | * Registers the component. The name is optional for enclosures that | |
251 | * give their components a unique name. If not, leave the field NULL | |
252 | * and a name will be assigned. | |
253 | * | |
254 | * Returns a pointer to the enclosure component or an error. | |
255 | */ | |
256 | struct enclosure_component * | |
257 | enclosure_component_register(struct enclosure_device *edev, | |
258 | unsigned int number, | |
259 | enum enclosure_component_type type, | |
260 | const char *name) | |
261 | { | |
262 | struct enclosure_component *ecomp; | |
ee959b00 | 263 | struct device *cdev; |
d569d5bb JB |
264 | int err; |
265 | ||
266 | if (number >= edev->components) | |
267 | return ERR_PTR(-EINVAL); | |
268 | ||
269 | ecomp = &edev->component[number]; | |
270 | ||
271 | if (ecomp->number != -1) | |
272 | return ERR_PTR(-EINVAL); | |
273 | ||
274 | ecomp->type = type; | |
275 | ecomp->number = number; | |
276 | cdev = &ecomp->cdev; | |
ee959b00 | 277 | cdev->parent = get_device(&edev->edev); |
5e43754f YL |
278 | if (name && name[0]) |
279 | dev_set_name(cdev, "%s", name); | |
d569d5bb | 280 | else |
71610f55 | 281 | dev_set_name(cdev, "%u", number); |
d569d5bb | 282 | |
cb6b7f40 JB |
283 | cdev->release = enclosure_component_release; |
284 | cdev->groups = enclosure_groups; | |
285 | ||
ee959b00 | 286 | err = device_register(cdev); |
d569d5bb JB |
287 | if (err) |
288 | ERR_PTR(err); | |
289 | ||
290 | return ecomp; | |
291 | } | |
292 | EXPORT_SYMBOL_GPL(enclosure_component_register); | |
293 | ||
294 | /** | |
295 | * enclosure_add_device - add a device as being part of an enclosure | |
296 | * @edev: the enclosure device being added to. | |
297 | * @num: the number of the component | |
298 | * @dev: the device being added | |
299 | * | |
300 | * Declares a real device to reside in slot (or identifier) @num of an | |
301 | * enclosure. This will cause the relevant sysfs links to appear. | |
302 | * This function may also be used to change a device associated with | |
303 | * an enclosure without having to call enclosure_remove_device() in | |
304 | * between. | |
305 | * | |
306 | * Returns zero on success or an error. | |
307 | */ | |
308 | int enclosure_add_device(struct enclosure_device *edev, int component, | |
309 | struct device *dev) | |
310 | { | |
ee959b00 | 311 | struct enclosure_component *cdev; |
d569d5bb JB |
312 | |
313 | if (!edev || component >= edev->components) | |
314 | return -EINVAL; | |
315 | ||
ee959b00 | 316 | cdev = &edev->component[component]; |
d569d5bb | 317 | |
21fab1d0 JB |
318 | if (cdev->dev == dev) |
319 | return -EEXIST; | |
320 | ||
cb6b7f40 JB |
321 | if (cdev->dev) |
322 | enclosure_remove_links(cdev); | |
323 | ||
ee959b00 | 324 | put_device(cdev->dev); |
d569d5bb | 325 | cdev->dev = get_device(dev); |
cb6b7f40 | 326 | return enclosure_add_links(cdev); |
d569d5bb JB |
327 | } |
328 | EXPORT_SYMBOL_GPL(enclosure_add_device); | |
329 | ||
330 | /** | |
331 | * enclosure_remove_device - remove a device from an enclosure | |
332 | * @edev: the enclosure device | |
333 | * @num: the number of the component to remove | |
334 | * | |
335 | * Returns zero on success or an error. | |
336 | * | |
337 | */ | |
43d8eb9c | 338 | int enclosure_remove_device(struct enclosure_device *edev, struct device *dev) |
d569d5bb | 339 | { |
ee959b00 | 340 | struct enclosure_component *cdev; |
43d8eb9c | 341 | int i; |
d569d5bb | 342 | |
43d8eb9c | 343 | if (!edev || !dev) |
d569d5bb JB |
344 | return -EINVAL; |
345 | ||
43d8eb9c JB |
346 | for (i = 0; i < edev->components; i++) { |
347 | cdev = &edev->component[i]; | |
348 | if (cdev->dev == dev) { | |
349 | enclosure_remove_links(cdev); | |
350 | device_del(&cdev->cdev); | |
351 | put_device(dev); | |
352 | cdev->dev = NULL; | |
353 | return device_add(&cdev->cdev); | |
354 | } | |
355 | } | |
356 | return -ENODEV; | |
d569d5bb JB |
357 | } |
358 | EXPORT_SYMBOL_GPL(enclosure_remove_device); | |
359 | ||
360 | /* | |
361 | * sysfs pieces below | |
362 | */ | |
363 | ||
ee959b00 TJ |
364 | static ssize_t enclosure_show_components(struct device *cdev, |
365 | struct device_attribute *attr, | |
366 | char *buf) | |
d569d5bb JB |
367 | { |
368 | struct enclosure_device *edev = to_enclosure_device(cdev); | |
369 | ||
370 | return snprintf(buf, 40, "%d\n", edev->components); | |
371 | } | |
372 | ||
ee959b00 | 373 | static struct device_attribute enclosure_attrs[] = { |
d569d5bb JB |
374 | __ATTR(components, S_IRUGO, enclosure_show_components, NULL), |
375 | __ATTR_NULL | |
376 | }; | |
377 | ||
378 | static struct class enclosure_class = { | |
379 | .name = "enclosure", | |
380 | .owner = THIS_MODULE, | |
ee959b00 TJ |
381 | .dev_release = enclosure_release, |
382 | .dev_attrs = enclosure_attrs, | |
d569d5bb JB |
383 | }; |
384 | ||
385 | static const char *const enclosure_status [] = { | |
386 | [ENCLOSURE_STATUS_UNSUPPORTED] = "unsupported", | |
387 | [ENCLOSURE_STATUS_OK] = "OK", | |
388 | [ENCLOSURE_STATUS_CRITICAL] = "critical", | |
389 | [ENCLOSURE_STATUS_NON_CRITICAL] = "non-critical", | |
390 | [ENCLOSURE_STATUS_UNRECOVERABLE] = "unrecoverable", | |
391 | [ENCLOSURE_STATUS_NOT_INSTALLED] = "not installed", | |
392 | [ENCLOSURE_STATUS_UNKNOWN] = "unknown", | |
393 | [ENCLOSURE_STATUS_UNAVAILABLE] = "unavailable", | |
cc9b2e9f | 394 | [ENCLOSURE_STATUS_MAX] = NULL, |
d569d5bb JB |
395 | }; |
396 | ||
397 | static const char *const enclosure_type [] = { | |
398 | [ENCLOSURE_COMPONENT_DEVICE] = "device", | |
399 | [ENCLOSURE_COMPONENT_ARRAY_DEVICE] = "array device", | |
400 | }; | |
401 | ||
ee959b00 TJ |
402 | static ssize_t get_component_fault(struct device *cdev, |
403 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
404 | { |
405 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
406 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
407 | ||
408 | if (edev->cb->get_fault) | |
409 | edev->cb->get_fault(edev, ecomp); | |
410 | return snprintf(buf, 40, "%d\n", ecomp->fault); | |
411 | } | |
412 | ||
ee959b00 TJ |
413 | static ssize_t set_component_fault(struct device *cdev, |
414 | struct device_attribute *attr, | |
415 | const char *buf, size_t count) | |
d569d5bb JB |
416 | { |
417 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
418 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
419 | int val = simple_strtoul(buf, NULL, 0); | |
420 | ||
421 | if (edev->cb->set_fault) | |
422 | edev->cb->set_fault(edev, ecomp, val); | |
423 | return count; | |
424 | } | |
425 | ||
ee959b00 TJ |
426 | static ssize_t get_component_status(struct device *cdev, |
427 | struct device_attribute *attr,char *buf) | |
d569d5bb JB |
428 | { |
429 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
430 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
431 | ||
432 | if (edev->cb->get_status) | |
433 | edev->cb->get_status(edev, ecomp); | |
434 | return snprintf(buf, 40, "%s\n", enclosure_status[ecomp->status]); | |
435 | } | |
436 | ||
ee959b00 TJ |
437 | static ssize_t set_component_status(struct device *cdev, |
438 | struct device_attribute *attr, | |
439 | const char *buf, size_t count) | |
d569d5bb JB |
440 | { |
441 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
442 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
443 | int i; | |
444 | ||
445 | for (i = 0; enclosure_status[i]; i++) { | |
446 | if (strncmp(buf, enclosure_status[i], | |
447 | strlen(enclosure_status[i])) == 0 && | |
448 | (buf[strlen(enclosure_status[i])] == '\n' || | |
449 | buf[strlen(enclosure_status[i])] == '\0')) | |
450 | break; | |
451 | } | |
452 | ||
453 | if (enclosure_status[i] && edev->cb->set_status) { | |
454 | edev->cb->set_status(edev, ecomp, i); | |
455 | return count; | |
456 | } else | |
457 | return -EINVAL; | |
458 | } | |
459 | ||
ee959b00 TJ |
460 | static ssize_t get_component_active(struct device *cdev, |
461 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
462 | { |
463 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
464 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
465 | ||
466 | if (edev->cb->get_active) | |
467 | edev->cb->get_active(edev, ecomp); | |
468 | return snprintf(buf, 40, "%d\n", ecomp->active); | |
469 | } | |
470 | ||
ee959b00 TJ |
471 | static ssize_t set_component_active(struct device *cdev, |
472 | struct device_attribute *attr, | |
473 | const char *buf, size_t count) | |
d569d5bb JB |
474 | { |
475 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
476 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
477 | int val = simple_strtoul(buf, NULL, 0); | |
478 | ||
479 | if (edev->cb->set_active) | |
480 | edev->cb->set_active(edev, ecomp, val); | |
481 | return count; | |
482 | } | |
483 | ||
ee959b00 TJ |
484 | static ssize_t get_component_locate(struct device *cdev, |
485 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
486 | { |
487 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
488 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
489 | ||
490 | if (edev->cb->get_locate) | |
491 | edev->cb->get_locate(edev, ecomp); | |
492 | return snprintf(buf, 40, "%d\n", ecomp->locate); | |
493 | } | |
494 | ||
ee959b00 TJ |
495 | static ssize_t set_component_locate(struct device *cdev, |
496 | struct device_attribute *attr, | |
497 | const char *buf, size_t count) | |
d569d5bb JB |
498 | { |
499 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
500 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
501 | int val = simple_strtoul(buf, NULL, 0); | |
502 | ||
503 | if (edev->cb->set_locate) | |
504 | edev->cb->set_locate(edev, ecomp, val); | |
505 | return count; | |
506 | } | |
507 | ||
ee959b00 TJ |
508 | static ssize_t get_component_type(struct device *cdev, |
509 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
510 | { |
511 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
512 | ||
513 | return snprintf(buf, 40, "%s\n", enclosure_type[ecomp->type]); | |
514 | } | |
515 | ||
516 | ||
cb6b7f40 JB |
517 | static DEVICE_ATTR(fault, S_IRUGO | S_IWUSR, get_component_fault, |
518 | set_component_fault); | |
519 | static DEVICE_ATTR(status, S_IRUGO | S_IWUSR, get_component_status, | |
520 | set_component_status); | |
521 | static DEVICE_ATTR(active, S_IRUGO | S_IWUSR, get_component_active, | |
522 | set_component_active); | |
523 | static DEVICE_ATTR(locate, S_IRUGO | S_IWUSR, get_component_locate, | |
524 | set_component_locate); | |
525 | static DEVICE_ATTR(type, S_IRUGO, get_component_type, NULL); | |
526 | ||
527 | static struct attribute *enclosure_component_attrs[] = { | |
528 | &dev_attr_fault.attr, | |
529 | &dev_attr_status.attr, | |
530 | &dev_attr_active.attr, | |
531 | &dev_attr_locate.attr, | |
532 | &dev_attr_type.attr, | |
533 | NULL | |
d569d5bb JB |
534 | }; |
535 | ||
cb6b7f40 JB |
536 | static struct attribute_group enclosure_group = { |
537 | .attrs = enclosure_component_attrs, | |
538 | }; | |
539 | ||
a4dbd674 | 540 | static const struct attribute_group *enclosure_groups[] = { |
cb6b7f40 JB |
541 | &enclosure_group, |
542 | NULL | |
d569d5bb JB |
543 | }; |
544 | ||
545 | static int __init enclosure_init(void) | |
546 | { | |
547 | int err; | |
548 | ||
549 | err = class_register(&enclosure_class); | |
550 | if (err) | |
551 | return err; | |
d569d5bb JB |
552 | |
553 | return 0; | |
d569d5bb JB |
554 | } |
555 | ||
556 | static void __exit enclosure_exit(void) | |
557 | { | |
d569d5bb JB |
558 | class_unregister(&enclosure_class); |
559 | } | |
560 | ||
561 | module_init(enclosure_init); | |
562 | module_exit(enclosure_exit); | |
563 | ||
564 | MODULE_AUTHOR("James Bottomley"); | |
565 | MODULE_DESCRIPTION("Enclosure Services"); | |
566 | MODULE_LICENSE("GPL v2"); |