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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 | ||
921ce7f5 | 148 | for (i = 0; i < components; i++) { |
d569d5bb | 149 | edev->component[i].number = -1; |
921ce7f5 | 150 | edev->component[i].slot = -1; |
08024885 | 151 | edev->component[i].power_status = 1; |
921ce7f5 | 152 | } |
d569d5bb JB |
153 | |
154 | mutex_lock(&container_list_lock); | |
155 | list_add_tail(&edev->node, &container_list); | |
156 | mutex_unlock(&container_list_lock); | |
157 | ||
158 | return edev; | |
159 | ||
160 | err: | |
ee959b00 | 161 | put_device(edev->edev.parent); |
d569d5bb JB |
162 | kfree(edev); |
163 | return ERR_PTR(err); | |
164 | } | |
165 | EXPORT_SYMBOL_GPL(enclosure_register); | |
166 | ||
167 | static struct enclosure_component_callbacks enclosure_null_callbacks; | |
168 | ||
169 | /** | |
170 | * enclosure_unregister - remove an enclosure | |
171 | * | |
172 | * @edev: the registered enclosure to remove; | |
173 | */ | |
174 | void enclosure_unregister(struct enclosure_device *edev) | |
175 | { | |
176 | int i; | |
177 | ||
178 | mutex_lock(&container_list_lock); | |
179 | list_del(&edev->node); | |
180 | mutex_unlock(&container_list_lock); | |
181 | ||
182 | for (i = 0; i < edev->components; i++) | |
183 | if (edev->component[i].number != -1) | |
ee959b00 | 184 | device_unregister(&edev->component[i].cdev); |
d569d5bb JB |
185 | |
186 | /* prevent any callbacks into service user */ | |
187 | edev->cb = &enclosure_null_callbacks; | |
ee959b00 | 188 | device_unregister(&edev->edev); |
d569d5bb JB |
189 | } |
190 | EXPORT_SYMBOL_GPL(enclosure_unregister); | |
191 | ||
cb6b7f40 | 192 | #define ENCLOSURE_NAME_SIZE 64 |
d2fd76e6 | 193 | #define COMPONENT_NAME_SIZE 64 |
cb6b7f40 JB |
194 | |
195 | static void enclosure_link_name(struct enclosure_component *cdev, char *name) | |
196 | { | |
197 | strcpy(name, "enclosure_device:"); | |
71610f55 | 198 | strcat(name, dev_name(&cdev->cdev)); |
cb6b7f40 JB |
199 | } |
200 | ||
201 | static void enclosure_remove_links(struct enclosure_component *cdev) | |
202 | { | |
203 | char name[ENCLOSURE_NAME_SIZE]; | |
204 | ||
a1470c7b JB |
205 | /* |
206 | * In odd circumstances, like multipath devices, something else may | |
207 | * already have removed the links, so check for this condition first. | |
208 | */ | |
209 | if (!cdev->dev->kobj.sd) | |
210 | return; | |
211 | ||
cb6b7f40 JB |
212 | enclosure_link_name(cdev, name); |
213 | sysfs_remove_link(&cdev->dev->kobj, name); | |
214 | sysfs_remove_link(&cdev->cdev.kobj, "device"); | |
215 | } | |
216 | ||
217 | static int enclosure_add_links(struct enclosure_component *cdev) | |
218 | { | |
219 | int error; | |
220 | char name[ENCLOSURE_NAME_SIZE]; | |
221 | ||
222 | error = sysfs_create_link(&cdev->cdev.kobj, &cdev->dev->kobj, "device"); | |
223 | if (error) | |
224 | return error; | |
225 | ||
226 | enclosure_link_name(cdev, name); | |
227 | error = sysfs_create_link(&cdev->dev->kobj, &cdev->cdev.kobj, name); | |
228 | if (error) | |
229 | sysfs_remove_link(&cdev->cdev.kobj, "device"); | |
230 | ||
231 | return error; | |
232 | } | |
233 | ||
ee959b00 | 234 | static void enclosure_release(struct device *cdev) |
d569d5bb JB |
235 | { |
236 | struct enclosure_device *edev = to_enclosure_device(cdev); | |
237 | ||
ee959b00 | 238 | put_device(cdev->parent); |
d569d5bb JB |
239 | kfree(edev); |
240 | } | |
241 | ||
ee959b00 | 242 | static void enclosure_component_release(struct device *dev) |
d569d5bb | 243 | { |
ee959b00 TJ |
244 | struct enclosure_component *cdev = to_enclosure_component(dev); |
245 | ||
cb6b7f40 JB |
246 | if (cdev->dev) { |
247 | enclosure_remove_links(cdev); | |
248 | put_device(cdev->dev); | |
249 | } | |
ee959b00 | 250 | put_device(dev->parent); |
d569d5bb JB |
251 | } |
252 | ||
d2fd76e6 MS |
253 | static struct enclosure_component * |
254 | enclosure_component_find_by_name(struct enclosure_device *edev, | |
255 | const char *name) | |
256 | { | |
257 | int i; | |
258 | const char *cname; | |
259 | struct enclosure_component *ecomp; | |
260 | ||
261 | if (!edev || !name || !name[0]) | |
262 | return NULL; | |
263 | ||
264 | for (i = 0; i < edev->components; i++) { | |
265 | ecomp = &edev->component[i]; | |
266 | cname = dev_name(&ecomp->cdev); | |
267 | if (ecomp->number != -1 && | |
268 | cname && cname[0] && | |
269 | !strcmp(cname, name)) | |
270 | return ecomp; | |
271 | } | |
272 | ||
273 | return NULL; | |
274 | } | |
275 | ||
899826f1 | 276 | static const struct attribute_group *enclosure_component_groups[]; |
cb6b7f40 | 277 | |
d569d5bb | 278 | /** |
ed09dcc8 | 279 | * enclosure_component_alloc - prepare a new enclosure component |
d569d5bb JB |
280 | * @edev: the enclosure to add the component |
281 | * @num: the device number | |
282 | * @type: the type of component being added | |
283 | * @name: an optional name to appear in sysfs (leave NULL if none) | |
284 | * | |
ed09dcc8 DW |
285 | * The name is optional for enclosures that give their components a unique |
286 | * name. If not, leave the field NULL and a name will be assigned. | |
d569d5bb JB |
287 | * |
288 | * Returns a pointer to the enclosure component or an error. | |
289 | */ | |
290 | struct enclosure_component * | |
ed09dcc8 DW |
291 | enclosure_component_alloc(struct enclosure_device *edev, |
292 | unsigned int number, | |
293 | enum enclosure_component_type type, | |
294 | const char *name) | |
d569d5bb JB |
295 | { |
296 | struct enclosure_component *ecomp; | |
ee959b00 | 297 | struct device *cdev; |
ed09dcc8 | 298 | int i; |
d2fd76e6 | 299 | char newname[COMPONENT_NAME_SIZE]; |
d569d5bb JB |
300 | |
301 | if (number >= edev->components) | |
302 | return ERR_PTR(-EINVAL); | |
303 | ||
304 | ecomp = &edev->component[number]; | |
305 | ||
306 | if (ecomp->number != -1) | |
307 | return ERR_PTR(-EINVAL); | |
308 | ||
309 | ecomp->type = type; | |
310 | ecomp->number = number; | |
311 | cdev = &ecomp->cdev; | |
ee959b00 | 312 | cdev->parent = get_device(&edev->edev); |
d2fd76e6 MS |
313 | |
314 | if (name && name[0]) { | |
315 | /* Some hardware (e.g. enclosure in RX300 S6) has components | |
316 | * with non unique names. Registering duplicates in sysfs | |
317 | * will lead to warnings during bootup. So make the names | |
318 | * unique by appending consecutive numbers -1, -2, ... */ | |
319 | i = 1; | |
320 | snprintf(newname, COMPONENT_NAME_SIZE, | |
321 | "%s", name); | |
322 | while (enclosure_component_find_by_name(edev, newname)) | |
323 | snprintf(newname, COMPONENT_NAME_SIZE, | |
324 | "%s-%i", name, i++); | |
325 | dev_set_name(cdev, "%s", newname); | |
326 | } else | |
71610f55 | 327 | dev_set_name(cdev, "%u", number); |
d569d5bb | 328 | |
cb6b7f40 | 329 | cdev->release = enclosure_component_release; |
899826f1 | 330 | cdev->groups = enclosure_component_groups; |
cb6b7f40 | 331 | |
ed09dcc8 DW |
332 | return ecomp; |
333 | } | |
334 | EXPORT_SYMBOL_GPL(enclosure_component_alloc); | |
335 | ||
336 | /** | |
337 | * enclosure_component_register - publishes an initialized enclosure component | |
338 | * @ecomp: component to add | |
339 | * | |
340 | * Returns 0 on successful registration, releases the component otherwise | |
341 | */ | |
342 | int enclosure_component_register(struct enclosure_component *ecomp) | |
343 | { | |
344 | struct device *cdev; | |
345 | int err; | |
346 | ||
347 | cdev = &ecomp->cdev; | |
ee959b00 | 348 | err = device_register(cdev); |
a91c1be2 JB |
349 | if (err) { |
350 | ecomp->number = -1; | |
351 | put_device(cdev); | |
ed09dcc8 | 352 | return err; |
a91c1be2 | 353 | } |
d569d5bb | 354 | |
ed09dcc8 | 355 | return 0; |
d569d5bb JB |
356 | } |
357 | EXPORT_SYMBOL_GPL(enclosure_component_register); | |
358 | ||
359 | /** | |
360 | * enclosure_add_device - add a device as being part of an enclosure | |
361 | * @edev: the enclosure device being added to. | |
362 | * @num: the number of the component | |
363 | * @dev: the device being added | |
364 | * | |
365 | * Declares a real device to reside in slot (or identifier) @num of an | |
366 | * enclosure. This will cause the relevant sysfs links to appear. | |
367 | * This function may also be used to change a device associated with | |
368 | * an enclosure without having to call enclosure_remove_device() in | |
369 | * between. | |
370 | * | |
371 | * Returns zero on success or an error. | |
372 | */ | |
373 | int enclosure_add_device(struct enclosure_device *edev, int component, | |
374 | struct device *dev) | |
375 | { | |
ee959b00 | 376 | struct enclosure_component *cdev; |
d569d5bb JB |
377 | |
378 | if (!edev || component >= edev->components) | |
379 | return -EINVAL; | |
380 | ||
ee959b00 | 381 | cdev = &edev->component[component]; |
d569d5bb | 382 | |
21fab1d0 JB |
383 | if (cdev->dev == dev) |
384 | return -EEXIST; | |
385 | ||
cb6b7f40 JB |
386 | if (cdev->dev) |
387 | enclosure_remove_links(cdev); | |
388 | ||
ee959b00 | 389 | put_device(cdev->dev); |
d569d5bb | 390 | cdev->dev = get_device(dev); |
cb6b7f40 | 391 | return enclosure_add_links(cdev); |
d569d5bb JB |
392 | } |
393 | EXPORT_SYMBOL_GPL(enclosure_add_device); | |
394 | ||
395 | /** | |
396 | * enclosure_remove_device - remove a device from an enclosure | |
397 | * @edev: the enclosure device | |
398 | * @num: the number of the component to remove | |
399 | * | |
400 | * Returns zero on success or an error. | |
401 | * | |
402 | */ | |
43d8eb9c | 403 | int enclosure_remove_device(struct enclosure_device *edev, struct device *dev) |
d569d5bb | 404 | { |
ee959b00 | 405 | struct enclosure_component *cdev; |
43d8eb9c | 406 | int i; |
d569d5bb | 407 | |
43d8eb9c | 408 | if (!edev || !dev) |
d569d5bb JB |
409 | return -EINVAL; |
410 | ||
43d8eb9c JB |
411 | for (i = 0; i < edev->components; i++) { |
412 | cdev = &edev->component[i]; | |
413 | if (cdev->dev == dev) { | |
414 | enclosure_remove_links(cdev); | |
415 | device_del(&cdev->cdev); | |
416 | put_device(dev); | |
417 | cdev->dev = NULL; | |
418 | return device_add(&cdev->cdev); | |
419 | } | |
420 | } | |
421 | return -ENODEV; | |
d569d5bb JB |
422 | } |
423 | EXPORT_SYMBOL_GPL(enclosure_remove_device); | |
424 | ||
425 | /* | |
426 | * sysfs pieces below | |
427 | */ | |
428 | ||
899826f1 GKH |
429 | static ssize_t components_show(struct device *cdev, |
430 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
431 | { |
432 | struct enclosure_device *edev = to_enclosure_device(cdev); | |
433 | ||
434 | return snprintf(buf, 40, "%d\n", edev->components); | |
435 | } | |
899826f1 | 436 | static DEVICE_ATTR_RO(components); |
d569d5bb | 437 | |
967f7bab DW |
438 | static ssize_t id_show(struct device *cdev, |
439 | struct device_attribute *attr, | |
440 | char *buf) | |
441 | { | |
442 | struct enclosure_device *edev = to_enclosure_device(cdev); | |
443 | ||
444 | if (edev->cb->show_id) | |
445 | return edev->cb->show_id(edev, buf); | |
446 | return -EINVAL; | |
447 | } | |
448 | static DEVICE_ATTR_RO(id); | |
449 | ||
899826f1 GKH |
450 | static struct attribute *enclosure_class_attrs[] = { |
451 | &dev_attr_components.attr, | |
967f7bab | 452 | &dev_attr_id.attr, |
899826f1 | 453 | NULL, |
d569d5bb | 454 | }; |
899826f1 | 455 | ATTRIBUTE_GROUPS(enclosure_class); |
d569d5bb JB |
456 | |
457 | static struct class enclosure_class = { | |
458 | .name = "enclosure", | |
459 | .owner = THIS_MODULE, | |
ee959b00 | 460 | .dev_release = enclosure_release, |
899826f1 | 461 | .dev_groups = enclosure_class_groups, |
d569d5bb JB |
462 | }; |
463 | ||
464 | static const char *const enclosure_status [] = { | |
465 | [ENCLOSURE_STATUS_UNSUPPORTED] = "unsupported", | |
466 | [ENCLOSURE_STATUS_OK] = "OK", | |
467 | [ENCLOSURE_STATUS_CRITICAL] = "critical", | |
468 | [ENCLOSURE_STATUS_NON_CRITICAL] = "non-critical", | |
469 | [ENCLOSURE_STATUS_UNRECOVERABLE] = "unrecoverable", | |
470 | [ENCLOSURE_STATUS_NOT_INSTALLED] = "not installed", | |
471 | [ENCLOSURE_STATUS_UNKNOWN] = "unknown", | |
472 | [ENCLOSURE_STATUS_UNAVAILABLE] = "unavailable", | |
cc9b2e9f | 473 | [ENCLOSURE_STATUS_MAX] = NULL, |
d569d5bb JB |
474 | }; |
475 | ||
476 | static const char *const enclosure_type [] = { | |
477 | [ENCLOSURE_COMPONENT_DEVICE] = "device", | |
478 | [ENCLOSURE_COMPONENT_ARRAY_DEVICE] = "array device", | |
479 | }; | |
480 | ||
ee959b00 TJ |
481 | static ssize_t get_component_fault(struct device *cdev, |
482 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
483 | { |
484 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
485 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
486 | ||
487 | if (edev->cb->get_fault) | |
488 | edev->cb->get_fault(edev, ecomp); | |
489 | return snprintf(buf, 40, "%d\n", ecomp->fault); | |
490 | } | |
491 | ||
ee959b00 TJ |
492 | static ssize_t set_component_fault(struct device *cdev, |
493 | struct device_attribute *attr, | |
494 | const char *buf, size_t count) | |
d569d5bb JB |
495 | { |
496 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
497 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
498 | int val = simple_strtoul(buf, NULL, 0); | |
499 | ||
500 | if (edev->cb->set_fault) | |
501 | edev->cb->set_fault(edev, ecomp, val); | |
502 | return count; | |
503 | } | |
504 | ||
ee959b00 TJ |
505 | static ssize_t get_component_status(struct device *cdev, |
506 | struct device_attribute *attr,char *buf) | |
d569d5bb JB |
507 | { |
508 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
509 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
510 | ||
511 | if (edev->cb->get_status) | |
512 | edev->cb->get_status(edev, ecomp); | |
513 | return snprintf(buf, 40, "%s\n", enclosure_status[ecomp->status]); | |
514 | } | |
515 | ||
ee959b00 TJ |
516 | static ssize_t set_component_status(struct device *cdev, |
517 | struct device_attribute *attr, | |
518 | const char *buf, size_t count) | |
d569d5bb JB |
519 | { |
520 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
521 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
522 | int i; | |
523 | ||
524 | for (i = 0; enclosure_status[i]; i++) { | |
525 | if (strncmp(buf, enclosure_status[i], | |
526 | strlen(enclosure_status[i])) == 0 && | |
527 | (buf[strlen(enclosure_status[i])] == '\n' || | |
528 | buf[strlen(enclosure_status[i])] == '\0')) | |
529 | break; | |
530 | } | |
531 | ||
532 | if (enclosure_status[i] && edev->cb->set_status) { | |
533 | edev->cb->set_status(edev, ecomp, i); | |
534 | return count; | |
535 | } else | |
536 | return -EINVAL; | |
537 | } | |
538 | ||
ee959b00 TJ |
539 | static ssize_t get_component_active(struct device *cdev, |
540 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
541 | { |
542 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
543 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
544 | ||
545 | if (edev->cb->get_active) | |
546 | edev->cb->get_active(edev, ecomp); | |
547 | return snprintf(buf, 40, "%d\n", ecomp->active); | |
548 | } | |
549 | ||
ee959b00 TJ |
550 | static ssize_t set_component_active(struct device *cdev, |
551 | struct device_attribute *attr, | |
552 | const char *buf, size_t count) | |
d569d5bb JB |
553 | { |
554 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
555 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
556 | int val = simple_strtoul(buf, NULL, 0); | |
557 | ||
558 | if (edev->cb->set_active) | |
559 | edev->cb->set_active(edev, ecomp, val); | |
560 | return count; | |
561 | } | |
562 | ||
ee959b00 TJ |
563 | static ssize_t get_component_locate(struct device *cdev, |
564 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
565 | { |
566 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
567 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
568 | ||
569 | if (edev->cb->get_locate) | |
570 | edev->cb->get_locate(edev, ecomp); | |
571 | return snprintf(buf, 40, "%d\n", ecomp->locate); | |
572 | } | |
573 | ||
ee959b00 TJ |
574 | static ssize_t set_component_locate(struct device *cdev, |
575 | struct device_attribute *attr, | |
576 | const char *buf, size_t count) | |
d569d5bb JB |
577 | { |
578 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
579 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
580 | int val = simple_strtoul(buf, NULL, 0); | |
581 | ||
582 | if (edev->cb->set_locate) | |
583 | edev->cb->set_locate(edev, ecomp, val); | |
584 | return count; | |
585 | } | |
586 | ||
08024885 SL |
587 | static ssize_t get_component_power_status(struct device *cdev, |
588 | struct device_attribute *attr, | |
589 | char *buf) | |
590 | { | |
591 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
592 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
593 | ||
594 | if (edev->cb->get_power_status) | |
595 | edev->cb->get_power_status(edev, ecomp); | |
596 | return snprintf(buf, 40, "%s\n", ecomp->power_status ? "on" : "off"); | |
597 | } | |
598 | ||
599 | static ssize_t set_component_power_status(struct device *cdev, | |
600 | struct device_attribute *attr, | |
601 | const char *buf, size_t count) | |
602 | { | |
603 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
604 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
605 | int val; | |
606 | ||
607 | if (strncmp(buf, "on", 2) == 0 && | |
608 | (buf[2] == '\n' || buf[2] == '\0')) | |
609 | val = 1; | |
610 | else if (strncmp(buf, "off", 3) == 0 && | |
611 | (buf[3] == '\n' || buf[3] == '\0')) | |
612 | val = 0; | |
613 | else | |
614 | return -EINVAL; | |
615 | ||
616 | if (edev->cb->set_power_status) | |
617 | edev->cb->set_power_status(edev, ecomp, val); | |
618 | return count; | |
619 | } | |
620 | ||
ee959b00 TJ |
621 | static ssize_t get_component_type(struct device *cdev, |
622 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
623 | { |
624 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
625 | ||
626 | return snprintf(buf, 40, "%s\n", enclosure_type[ecomp->type]); | |
627 | } | |
628 | ||
921ce7f5 DW |
629 | static ssize_t get_component_slot(struct device *cdev, |
630 | struct device_attribute *attr, char *buf) | |
631 | { | |
632 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
633 | int slot; | |
634 | ||
635 | /* if the enclosure does not override then use 'number' as a stand-in */ | |
636 | if (ecomp->slot >= 0) | |
637 | slot = ecomp->slot; | |
638 | else | |
639 | slot = ecomp->number; | |
640 | ||
641 | return snprintf(buf, 40, "%d\n", slot); | |
642 | } | |
d569d5bb | 643 | |
cb6b7f40 JB |
644 | static DEVICE_ATTR(fault, S_IRUGO | S_IWUSR, get_component_fault, |
645 | set_component_fault); | |
646 | static DEVICE_ATTR(status, S_IRUGO | S_IWUSR, get_component_status, | |
647 | set_component_status); | |
648 | static DEVICE_ATTR(active, S_IRUGO | S_IWUSR, get_component_active, | |
649 | set_component_active); | |
650 | static DEVICE_ATTR(locate, S_IRUGO | S_IWUSR, get_component_locate, | |
651 | set_component_locate); | |
08024885 SL |
652 | static DEVICE_ATTR(power_status, S_IRUGO | S_IWUSR, get_component_power_status, |
653 | set_component_power_status); | |
cb6b7f40 | 654 | static DEVICE_ATTR(type, S_IRUGO, get_component_type, NULL); |
921ce7f5 | 655 | static DEVICE_ATTR(slot, S_IRUGO, get_component_slot, NULL); |
cb6b7f40 JB |
656 | |
657 | static struct attribute *enclosure_component_attrs[] = { | |
658 | &dev_attr_fault.attr, | |
659 | &dev_attr_status.attr, | |
660 | &dev_attr_active.attr, | |
661 | &dev_attr_locate.attr, | |
08024885 | 662 | &dev_attr_power_status.attr, |
cb6b7f40 | 663 | &dev_attr_type.attr, |
921ce7f5 | 664 | &dev_attr_slot.attr, |
cb6b7f40 | 665 | NULL |
d569d5bb | 666 | }; |
899826f1 | 667 | ATTRIBUTE_GROUPS(enclosure_component); |
d569d5bb JB |
668 | |
669 | static int __init enclosure_init(void) | |
670 | { | |
671 | int err; | |
672 | ||
673 | err = class_register(&enclosure_class); | |
674 | if (err) | |
675 | return err; | |
d569d5bb JB |
676 | |
677 | return 0; | |
d569d5bb JB |
678 | } |
679 | ||
680 | static void __exit enclosure_exit(void) | |
681 | { | |
d569d5bb JB |
682 | class_unregister(&enclosure_class); |
683 | } | |
684 | ||
685 | module_init(enclosure_init); | |
686 | module_exit(enclosure_exit); | |
687 | ||
688 | MODULE_AUTHOR("James Bottomley"); | |
689 | MODULE_DESCRIPTION("Enclosure Services"); | |
690 | MODULE_LICENSE("GPL v2"); |