Commit | Line | Data |
---|---|---|
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 | 275 | /** |
ed09dcc8 | 276 | * enclosure_component_alloc - prepare a new enclosure component |
d569d5bb JB |
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 | * | |
ed09dcc8 DW |
282 | * The name is optional for enclosures that give their components a unique |
283 | * name. If not, leave the field NULL and a name will be assigned. | |
d569d5bb JB |
284 | * |
285 | * Returns a pointer to the enclosure component or an error. | |
286 | */ | |
287 | struct enclosure_component * | |
ed09dcc8 DW |
288 | enclosure_component_alloc(struct enclosure_device *edev, |
289 | unsigned int number, | |
290 | enum enclosure_component_type type, | |
291 | const char *name) | |
d569d5bb JB |
292 | { |
293 | struct enclosure_component *ecomp; | |
ee959b00 | 294 | struct device *cdev; |
ed09dcc8 | 295 | int i; |
d2fd76e6 | 296 | char newname[COMPONENT_NAME_SIZE]; |
d569d5bb JB |
297 | |
298 | if (number >= edev->components) | |
299 | return ERR_PTR(-EINVAL); | |
300 | ||
301 | ecomp = &edev->component[number]; | |
302 | ||
303 | if (ecomp->number != -1) | |
304 | return ERR_PTR(-EINVAL); | |
305 | ||
306 | ecomp->type = type; | |
307 | ecomp->number = number; | |
308 | cdev = &ecomp->cdev; | |
ee959b00 | 309 | cdev->parent = get_device(&edev->edev); |
d2fd76e6 MS |
310 | |
311 | if (name && name[0]) { | |
312 | /* Some hardware (e.g. enclosure in RX300 S6) has components | |
313 | * with non unique names. Registering duplicates in sysfs | |
314 | * will lead to warnings during bootup. So make the names | |
315 | * unique by appending consecutive numbers -1, -2, ... */ | |
316 | i = 1; | |
317 | snprintf(newname, COMPONENT_NAME_SIZE, | |
318 | "%s", name); | |
319 | while (enclosure_component_find_by_name(edev, newname)) | |
320 | snprintf(newname, COMPONENT_NAME_SIZE, | |
321 | "%s-%i", name, i++); | |
322 | dev_set_name(cdev, "%s", newname); | |
323 | } else | |
71610f55 | 324 | dev_set_name(cdev, "%u", number); |
d569d5bb | 325 | |
cb6b7f40 | 326 | cdev->release = enclosure_component_release; |
899826f1 | 327 | cdev->groups = enclosure_component_groups; |
cb6b7f40 | 328 | |
ed09dcc8 DW |
329 | return ecomp; |
330 | } | |
331 | EXPORT_SYMBOL_GPL(enclosure_component_alloc); | |
332 | ||
333 | /** | |
334 | * enclosure_component_register - publishes an initialized enclosure component | |
335 | * @ecomp: component to add | |
336 | * | |
337 | * Returns 0 on successful registration, releases the component otherwise | |
338 | */ | |
339 | int enclosure_component_register(struct enclosure_component *ecomp) | |
340 | { | |
341 | struct device *cdev; | |
342 | int err; | |
343 | ||
344 | cdev = &ecomp->cdev; | |
ee959b00 | 345 | err = device_register(cdev); |
a91c1be2 JB |
346 | if (err) { |
347 | ecomp->number = -1; | |
348 | put_device(cdev); | |
ed09dcc8 | 349 | return err; |
a91c1be2 | 350 | } |
d569d5bb | 351 | |
ed09dcc8 | 352 | return 0; |
d569d5bb JB |
353 | } |
354 | EXPORT_SYMBOL_GPL(enclosure_component_register); | |
355 | ||
356 | /** | |
357 | * enclosure_add_device - add a device as being part of an enclosure | |
358 | * @edev: the enclosure device being added to. | |
359 | * @num: the number of the component | |
360 | * @dev: the device being added | |
361 | * | |
362 | * Declares a real device to reside in slot (or identifier) @num of an | |
363 | * enclosure. This will cause the relevant sysfs links to appear. | |
364 | * This function may also be used to change a device associated with | |
365 | * an enclosure without having to call enclosure_remove_device() in | |
366 | * between. | |
367 | * | |
368 | * Returns zero on success or an error. | |
369 | */ | |
370 | int enclosure_add_device(struct enclosure_device *edev, int component, | |
371 | struct device *dev) | |
372 | { | |
ee959b00 | 373 | struct enclosure_component *cdev; |
d569d5bb JB |
374 | |
375 | if (!edev || component >= edev->components) | |
376 | return -EINVAL; | |
377 | ||
ee959b00 | 378 | cdev = &edev->component[component]; |
d569d5bb | 379 | |
21fab1d0 JB |
380 | if (cdev->dev == dev) |
381 | return -EEXIST; | |
382 | ||
cb6b7f40 JB |
383 | if (cdev->dev) |
384 | enclosure_remove_links(cdev); | |
385 | ||
ee959b00 | 386 | put_device(cdev->dev); |
d569d5bb | 387 | cdev->dev = get_device(dev); |
cb6b7f40 | 388 | return enclosure_add_links(cdev); |
d569d5bb JB |
389 | } |
390 | EXPORT_SYMBOL_GPL(enclosure_add_device); | |
391 | ||
392 | /** | |
393 | * enclosure_remove_device - remove a device from an enclosure | |
394 | * @edev: the enclosure device | |
395 | * @num: the number of the component to remove | |
396 | * | |
397 | * Returns zero on success or an error. | |
398 | * | |
399 | */ | |
43d8eb9c | 400 | int enclosure_remove_device(struct enclosure_device *edev, struct device *dev) |
d569d5bb | 401 | { |
ee959b00 | 402 | struct enclosure_component *cdev; |
43d8eb9c | 403 | int i; |
d569d5bb | 404 | |
43d8eb9c | 405 | if (!edev || !dev) |
d569d5bb JB |
406 | return -EINVAL; |
407 | ||
43d8eb9c JB |
408 | for (i = 0; i < edev->components; i++) { |
409 | cdev = &edev->component[i]; | |
410 | if (cdev->dev == dev) { | |
411 | enclosure_remove_links(cdev); | |
412 | device_del(&cdev->cdev); | |
413 | put_device(dev); | |
414 | cdev->dev = NULL; | |
415 | return device_add(&cdev->cdev); | |
416 | } | |
417 | } | |
418 | return -ENODEV; | |
d569d5bb JB |
419 | } |
420 | EXPORT_SYMBOL_GPL(enclosure_remove_device); | |
421 | ||
422 | /* | |
423 | * sysfs pieces below | |
424 | */ | |
425 | ||
899826f1 GKH |
426 | static ssize_t components_show(struct device *cdev, |
427 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
428 | { |
429 | struct enclosure_device *edev = to_enclosure_device(cdev); | |
430 | ||
431 | return snprintf(buf, 40, "%d\n", edev->components); | |
432 | } | |
899826f1 | 433 | static DEVICE_ATTR_RO(components); |
d569d5bb | 434 | |
967f7bab DW |
435 | static ssize_t id_show(struct device *cdev, |
436 | struct device_attribute *attr, | |
437 | char *buf) | |
438 | { | |
439 | struct enclosure_device *edev = to_enclosure_device(cdev); | |
440 | ||
441 | if (edev->cb->show_id) | |
442 | return edev->cb->show_id(edev, buf); | |
443 | return -EINVAL; | |
444 | } | |
445 | static DEVICE_ATTR_RO(id); | |
446 | ||
899826f1 GKH |
447 | static struct attribute *enclosure_class_attrs[] = { |
448 | &dev_attr_components.attr, | |
967f7bab | 449 | &dev_attr_id.attr, |
899826f1 | 450 | NULL, |
d569d5bb | 451 | }; |
899826f1 | 452 | ATTRIBUTE_GROUPS(enclosure_class); |
d569d5bb JB |
453 | |
454 | static struct class enclosure_class = { | |
455 | .name = "enclosure", | |
456 | .owner = THIS_MODULE, | |
ee959b00 | 457 | .dev_release = enclosure_release, |
899826f1 | 458 | .dev_groups = enclosure_class_groups, |
d569d5bb JB |
459 | }; |
460 | ||
461 | static const char *const enclosure_status [] = { | |
462 | [ENCLOSURE_STATUS_UNSUPPORTED] = "unsupported", | |
463 | [ENCLOSURE_STATUS_OK] = "OK", | |
464 | [ENCLOSURE_STATUS_CRITICAL] = "critical", | |
465 | [ENCLOSURE_STATUS_NON_CRITICAL] = "non-critical", | |
466 | [ENCLOSURE_STATUS_UNRECOVERABLE] = "unrecoverable", | |
467 | [ENCLOSURE_STATUS_NOT_INSTALLED] = "not installed", | |
468 | [ENCLOSURE_STATUS_UNKNOWN] = "unknown", | |
469 | [ENCLOSURE_STATUS_UNAVAILABLE] = "unavailable", | |
cc9b2e9f | 470 | [ENCLOSURE_STATUS_MAX] = NULL, |
d569d5bb JB |
471 | }; |
472 | ||
473 | static const char *const enclosure_type [] = { | |
474 | [ENCLOSURE_COMPONENT_DEVICE] = "device", | |
475 | [ENCLOSURE_COMPONENT_ARRAY_DEVICE] = "array device", | |
476 | }; | |
477 | ||
ee959b00 TJ |
478 | static ssize_t get_component_fault(struct device *cdev, |
479 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
480 | { |
481 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
482 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
483 | ||
484 | if (edev->cb->get_fault) | |
485 | edev->cb->get_fault(edev, ecomp); | |
486 | return snprintf(buf, 40, "%d\n", ecomp->fault); | |
487 | } | |
488 | ||
ee959b00 TJ |
489 | static ssize_t set_component_fault(struct device *cdev, |
490 | struct device_attribute *attr, | |
491 | const char *buf, size_t count) | |
d569d5bb JB |
492 | { |
493 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
494 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
495 | int val = simple_strtoul(buf, NULL, 0); | |
496 | ||
497 | if (edev->cb->set_fault) | |
498 | edev->cb->set_fault(edev, ecomp, val); | |
499 | return count; | |
500 | } | |
501 | ||
ee959b00 TJ |
502 | static ssize_t get_component_status(struct device *cdev, |
503 | struct device_attribute *attr,char *buf) | |
d569d5bb JB |
504 | { |
505 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
506 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
507 | ||
508 | if (edev->cb->get_status) | |
509 | edev->cb->get_status(edev, ecomp); | |
510 | return snprintf(buf, 40, "%s\n", enclosure_status[ecomp->status]); | |
511 | } | |
512 | ||
ee959b00 TJ |
513 | static ssize_t set_component_status(struct device *cdev, |
514 | struct device_attribute *attr, | |
515 | const char *buf, size_t count) | |
d569d5bb JB |
516 | { |
517 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
518 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
519 | int i; | |
520 | ||
521 | for (i = 0; enclosure_status[i]; i++) { | |
522 | if (strncmp(buf, enclosure_status[i], | |
523 | strlen(enclosure_status[i])) == 0 && | |
524 | (buf[strlen(enclosure_status[i])] == '\n' || | |
525 | buf[strlen(enclosure_status[i])] == '\0')) | |
526 | break; | |
527 | } | |
528 | ||
529 | if (enclosure_status[i] && edev->cb->set_status) { | |
530 | edev->cb->set_status(edev, ecomp, i); | |
531 | return count; | |
532 | } else | |
533 | return -EINVAL; | |
534 | } | |
535 | ||
ee959b00 TJ |
536 | static ssize_t get_component_active(struct device *cdev, |
537 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
538 | { |
539 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
540 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
541 | ||
542 | if (edev->cb->get_active) | |
543 | edev->cb->get_active(edev, ecomp); | |
544 | return snprintf(buf, 40, "%d\n", ecomp->active); | |
545 | } | |
546 | ||
ee959b00 TJ |
547 | static ssize_t set_component_active(struct device *cdev, |
548 | struct device_attribute *attr, | |
549 | const char *buf, size_t count) | |
d569d5bb JB |
550 | { |
551 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
552 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
553 | int val = simple_strtoul(buf, NULL, 0); | |
554 | ||
555 | if (edev->cb->set_active) | |
556 | edev->cb->set_active(edev, ecomp, val); | |
557 | return count; | |
558 | } | |
559 | ||
ee959b00 TJ |
560 | static ssize_t get_component_locate(struct device *cdev, |
561 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
562 | { |
563 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
564 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
565 | ||
566 | if (edev->cb->get_locate) | |
567 | edev->cb->get_locate(edev, ecomp); | |
568 | return snprintf(buf, 40, "%d\n", ecomp->locate); | |
569 | } | |
570 | ||
ee959b00 TJ |
571 | static ssize_t set_component_locate(struct device *cdev, |
572 | struct device_attribute *attr, | |
573 | const char *buf, size_t count) | |
d569d5bb JB |
574 | { |
575 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
576 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
577 | int val = simple_strtoul(buf, NULL, 0); | |
578 | ||
579 | if (edev->cb->set_locate) | |
580 | edev->cb->set_locate(edev, ecomp, val); | |
581 | return count; | |
582 | } | |
583 | ||
ee959b00 TJ |
584 | static ssize_t get_component_type(struct device *cdev, |
585 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
586 | { |
587 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
588 | ||
589 | return snprintf(buf, 40, "%s\n", enclosure_type[ecomp->type]); | |
590 | } | |
591 | ||
592 | ||
cb6b7f40 JB |
593 | static DEVICE_ATTR(fault, S_IRUGO | S_IWUSR, get_component_fault, |
594 | set_component_fault); | |
595 | static DEVICE_ATTR(status, S_IRUGO | S_IWUSR, get_component_status, | |
596 | set_component_status); | |
597 | static DEVICE_ATTR(active, S_IRUGO | S_IWUSR, get_component_active, | |
598 | set_component_active); | |
599 | static DEVICE_ATTR(locate, S_IRUGO | S_IWUSR, get_component_locate, | |
600 | set_component_locate); | |
601 | static DEVICE_ATTR(type, S_IRUGO, get_component_type, NULL); | |
602 | ||
603 | static struct attribute *enclosure_component_attrs[] = { | |
604 | &dev_attr_fault.attr, | |
605 | &dev_attr_status.attr, | |
606 | &dev_attr_active.attr, | |
607 | &dev_attr_locate.attr, | |
608 | &dev_attr_type.attr, | |
609 | NULL | |
d569d5bb | 610 | }; |
899826f1 | 611 | ATTRIBUTE_GROUPS(enclosure_component); |
d569d5bb JB |
612 | |
613 | static int __init enclosure_init(void) | |
614 | { | |
615 | int err; | |
616 | ||
617 | err = class_register(&enclosure_class); | |
618 | if (err) | |
619 | return err; | |
d569d5bb JB |
620 | |
621 | return 0; | |
d569d5bb JB |
622 | } |
623 | ||
624 | static void __exit enclosure_exit(void) | |
625 | { | |
d569d5bb JB |
626 | class_unregister(&enclosure_class); |
627 | } | |
628 | ||
629 | module_init(enclosure_init); | |
630 | module_exit(enclosure_exit); | |
631 | ||
632 | MODULE_AUTHOR("James Bottomley"); | |
633 | MODULE_DESCRIPTION("Enclosure Services"); | |
634 | MODULE_LICENSE("GPL v2"); |