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 = | |
e3575c12 | 128 | kzalloc(struct_size(edev, component, components), GFP_KERNEL); |
d569d5bb JB |
129 | int err, i; |
130 | ||
131 | BUG_ON(!cb); | |
132 | ||
133 | if (!edev) | |
134 | return ERR_PTR(-ENOMEM); | |
135 | ||
136 | edev->components = components; | |
137 | ||
ee959b00 TJ |
138 | edev->edev.class = &enclosure_class; |
139 | edev->edev.parent = get_device(dev); | |
d569d5bb | 140 | edev->cb = cb; |
5e43754f | 141 | dev_set_name(&edev->edev, "%s", name); |
ee959b00 | 142 | err = device_register(&edev->edev); |
d569d5bb JB |
143 | if (err) |
144 | goto err; | |
145 | ||
921ce7f5 | 146 | for (i = 0; i < components; i++) { |
d569d5bb | 147 | edev->component[i].number = -1; |
921ce7f5 | 148 | edev->component[i].slot = -1; |
75106523 | 149 | edev->component[i].power_status = -1; |
921ce7f5 | 150 | } |
d569d5bb JB |
151 | |
152 | mutex_lock(&container_list_lock); | |
153 | list_add_tail(&edev->node, &container_list); | |
154 | mutex_unlock(&container_list_lock); | |
155 | ||
156 | return edev; | |
157 | ||
158 | err: | |
ee959b00 | 159 | put_device(edev->edev.parent); |
d569d5bb JB |
160 | kfree(edev); |
161 | return ERR_PTR(err); | |
162 | } | |
163 | EXPORT_SYMBOL_GPL(enclosure_register); | |
164 | ||
165 | static struct enclosure_component_callbacks enclosure_null_callbacks; | |
166 | ||
167 | /** | |
168 | * enclosure_unregister - remove an enclosure | |
169 | * | |
170 | * @edev: the registered enclosure to remove; | |
171 | */ | |
172 | void enclosure_unregister(struct enclosure_device *edev) | |
173 | { | |
174 | int i; | |
175 | ||
176 | mutex_lock(&container_list_lock); | |
177 | list_del(&edev->node); | |
178 | mutex_unlock(&container_list_lock); | |
179 | ||
180 | for (i = 0; i < edev->components; i++) | |
181 | if (edev->component[i].number != -1) | |
ee959b00 | 182 | device_unregister(&edev->component[i].cdev); |
d569d5bb JB |
183 | |
184 | /* prevent any callbacks into service user */ | |
185 | edev->cb = &enclosure_null_callbacks; | |
ee959b00 | 186 | device_unregister(&edev->edev); |
d569d5bb JB |
187 | } |
188 | EXPORT_SYMBOL_GPL(enclosure_unregister); | |
189 | ||
cb6b7f40 | 190 | #define ENCLOSURE_NAME_SIZE 64 |
d2fd76e6 | 191 | #define COMPONENT_NAME_SIZE 64 |
cb6b7f40 JB |
192 | |
193 | static void enclosure_link_name(struct enclosure_component *cdev, char *name) | |
194 | { | |
195 | strcpy(name, "enclosure_device:"); | |
71610f55 | 196 | strcat(name, dev_name(&cdev->cdev)); |
cb6b7f40 JB |
197 | } |
198 | ||
199 | static void enclosure_remove_links(struct enclosure_component *cdev) | |
200 | { | |
201 | char name[ENCLOSURE_NAME_SIZE]; | |
202 | ||
11e52a69 JB |
203 | enclosure_link_name(cdev, name); |
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 | */ | |
11e52a69 JB |
209 | if (cdev->dev->kobj.sd) |
210 | sysfs_remove_link(&cdev->dev->kobj, name); | |
a1470c7b | 211 | |
11e52a69 JB |
212 | if (cdev->cdev.kobj.sd) |
213 | sysfs_remove_link(&cdev->cdev.kobj, "device"); | |
cb6b7f40 JB |
214 | } |
215 | ||
216 | static int enclosure_add_links(struct enclosure_component *cdev) | |
217 | { | |
218 | int error; | |
219 | char name[ENCLOSURE_NAME_SIZE]; | |
220 | ||
221 | error = sysfs_create_link(&cdev->cdev.kobj, &cdev->dev->kobj, "device"); | |
222 | if (error) | |
223 | return error; | |
224 | ||
225 | enclosure_link_name(cdev, name); | |
226 | error = sysfs_create_link(&cdev->dev->kobj, &cdev->cdev.kobj, name); | |
227 | if (error) | |
228 | sysfs_remove_link(&cdev->cdev.kobj, "device"); | |
229 | ||
230 | return error; | |
231 | } | |
232 | ||
ee959b00 | 233 | static void enclosure_release(struct device *cdev) |
d569d5bb JB |
234 | { |
235 | struct enclosure_device *edev = to_enclosure_device(cdev); | |
236 | ||
ee959b00 | 237 | put_device(cdev->parent); |
d569d5bb JB |
238 | kfree(edev); |
239 | } | |
240 | ||
ee959b00 | 241 | static void enclosure_component_release(struct device *dev) |
d569d5bb | 242 | { |
ee959b00 TJ |
243 | struct enclosure_component *cdev = to_enclosure_component(dev); |
244 | ||
cb6b7f40 JB |
245 | if (cdev->dev) { |
246 | enclosure_remove_links(cdev); | |
247 | put_device(cdev->dev); | |
248 | } | |
ee959b00 | 249 | put_device(dev->parent); |
d569d5bb JB |
250 | } |
251 | ||
d2fd76e6 MS |
252 | static struct enclosure_component * |
253 | enclosure_component_find_by_name(struct enclosure_device *edev, | |
254 | const char *name) | |
255 | { | |
256 | int i; | |
257 | const char *cname; | |
258 | struct enclosure_component *ecomp; | |
259 | ||
260 | if (!edev || !name || !name[0]) | |
261 | return NULL; | |
262 | ||
263 | for (i = 0; i < edev->components; i++) { | |
264 | ecomp = &edev->component[i]; | |
265 | cname = dev_name(&ecomp->cdev); | |
266 | if (ecomp->number != -1 && | |
267 | cname && cname[0] && | |
268 | !strcmp(cname, name)) | |
269 | return ecomp; | |
270 | } | |
271 | ||
272 | return NULL; | |
273 | } | |
274 | ||
899826f1 | 275 | static const struct attribute_group *enclosure_component_groups[]; |
cb6b7f40 | 276 | |
d569d5bb | 277 | /** |
ed09dcc8 | 278 | * enclosure_component_alloc - prepare a new enclosure component |
d569d5bb JB |
279 | * @edev: the enclosure to add the component |
280 | * @num: the device number | |
281 | * @type: the type of component being added | |
282 | * @name: an optional name to appear in sysfs (leave NULL if none) | |
283 | * | |
ed09dcc8 DW |
284 | * The name is optional for enclosures that give their components a unique |
285 | * name. If not, leave the field NULL and a name will be assigned. | |
d569d5bb JB |
286 | * |
287 | * Returns a pointer to the enclosure component or an error. | |
288 | */ | |
289 | struct enclosure_component * | |
ed09dcc8 DW |
290 | enclosure_component_alloc(struct enclosure_device *edev, |
291 | unsigned int number, | |
292 | enum enclosure_component_type type, | |
293 | const char *name) | |
d569d5bb JB |
294 | { |
295 | struct enclosure_component *ecomp; | |
ee959b00 | 296 | struct device *cdev; |
ed09dcc8 | 297 | int i; |
d2fd76e6 | 298 | char newname[COMPONENT_NAME_SIZE]; |
d569d5bb JB |
299 | |
300 | if (number >= edev->components) | |
301 | return ERR_PTR(-EINVAL); | |
302 | ||
303 | ecomp = &edev->component[number]; | |
304 | ||
305 | if (ecomp->number != -1) | |
306 | return ERR_PTR(-EINVAL); | |
307 | ||
308 | ecomp->type = type; | |
309 | ecomp->number = number; | |
310 | cdev = &ecomp->cdev; | |
ee959b00 | 311 | cdev->parent = get_device(&edev->edev); |
d2fd76e6 MS |
312 | |
313 | if (name && name[0]) { | |
314 | /* Some hardware (e.g. enclosure in RX300 S6) has components | |
315 | * with non unique names. Registering duplicates in sysfs | |
316 | * will lead to warnings during bootup. So make the names | |
317 | * unique by appending consecutive numbers -1, -2, ... */ | |
318 | i = 1; | |
319 | snprintf(newname, COMPONENT_NAME_SIZE, | |
320 | "%s", name); | |
321 | while (enclosure_component_find_by_name(edev, newname)) | |
322 | snprintf(newname, COMPONENT_NAME_SIZE, | |
323 | "%s-%i", name, i++); | |
324 | dev_set_name(cdev, "%s", newname); | |
325 | } else | |
71610f55 | 326 | dev_set_name(cdev, "%u", number); |
d569d5bb | 327 | |
cb6b7f40 | 328 | cdev->release = enclosure_component_release; |
899826f1 | 329 | cdev->groups = enclosure_component_groups; |
cb6b7f40 | 330 | |
ed09dcc8 DW |
331 | return ecomp; |
332 | } | |
333 | EXPORT_SYMBOL_GPL(enclosure_component_alloc); | |
334 | ||
335 | /** | |
336 | * enclosure_component_register - publishes an initialized enclosure component | |
337 | * @ecomp: component to add | |
338 | * | |
339 | * Returns 0 on successful registration, releases the component otherwise | |
340 | */ | |
341 | int enclosure_component_register(struct enclosure_component *ecomp) | |
342 | { | |
343 | struct device *cdev; | |
344 | int err; | |
345 | ||
346 | cdev = &ecomp->cdev; | |
ee959b00 | 347 | err = device_register(cdev); |
a91c1be2 JB |
348 | if (err) { |
349 | ecomp->number = -1; | |
350 | put_device(cdev); | |
ed09dcc8 | 351 | return err; |
a91c1be2 | 352 | } |
d569d5bb | 353 | |
ed09dcc8 | 354 | return 0; |
d569d5bb JB |
355 | } |
356 | EXPORT_SYMBOL_GPL(enclosure_component_register); | |
357 | ||
358 | /** | |
359 | * enclosure_add_device - add a device as being part of an enclosure | |
360 | * @edev: the enclosure device being added to. | |
361 | * @num: the number of the component | |
362 | * @dev: the device being added | |
363 | * | |
364 | * Declares a real device to reside in slot (or identifier) @num of an | |
365 | * enclosure. This will cause the relevant sysfs links to appear. | |
366 | * This function may also be used to change a device associated with | |
367 | * an enclosure without having to call enclosure_remove_device() in | |
368 | * between. | |
369 | * | |
370 | * Returns zero on success or an error. | |
371 | */ | |
372 | int enclosure_add_device(struct enclosure_device *edev, int component, | |
373 | struct device *dev) | |
374 | { | |
ee959b00 | 375 | struct enclosure_component *cdev; |
62e62ffd | 376 | int err; |
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 | ||
62e62ffd | 386 | if (cdev->dev) { |
cb6b7f40 | 387 | enclosure_remove_links(cdev); |
62e62ffd ML |
388 | put_device(cdev->dev); |
389 | } | |
d569d5bb | 390 | cdev->dev = get_device(dev); |
62e62ffd ML |
391 | err = enclosure_add_links(cdev); |
392 | if (err) { | |
393 | put_device(cdev->dev); | |
394 | cdev->dev = NULL; | |
395 | } | |
396 | return err; | |
d569d5bb JB |
397 | } |
398 | EXPORT_SYMBOL_GPL(enclosure_add_device); | |
399 | ||
400 | /** | |
401 | * enclosure_remove_device - remove a device from an enclosure | |
402 | * @edev: the enclosure device | |
403 | * @num: the number of the component to remove | |
404 | * | |
405 | * Returns zero on success or an error. | |
406 | * | |
407 | */ | |
43d8eb9c | 408 | int enclosure_remove_device(struct enclosure_device *edev, struct device *dev) |
d569d5bb | 409 | { |
ee959b00 | 410 | struct enclosure_component *cdev; |
43d8eb9c | 411 | int i; |
d569d5bb | 412 | |
43d8eb9c | 413 | if (!edev || !dev) |
d569d5bb JB |
414 | return -EINVAL; |
415 | ||
43d8eb9c JB |
416 | for (i = 0; i < edev->components; i++) { |
417 | cdev = &edev->component[i]; | |
418 | if (cdev->dev == dev) { | |
419 | enclosure_remove_links(cdev); | |
420 | device_del(&cdev->cdev); | |
421 | put_device(dev); | |
422 | cdev->dev = NULL; | |
423 | return device_add(&cdev->cdev); | |
424 | } | |
425 | } | |
426 | return -ENODEV; | |
d569d5bb JB |
427 | } |
428 | EXPORT_SYMBOL_GPL(enclosure_remove_device); | |
429 | ||
430 | /* | |
431 | * sysfs pieces below | |
432 | */ | |
433 | ||
899826f1 GKH |
434 | static ssize_t components_show(struct device *cdev, |
435 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
436 | { |
437 | struct enclosure_device *edev = to_enclosure_device(cdev); | |
438 | ||
439 | return snprintf(buf, 40, "%d\n", edev->components); | |
440 | } | |
899826f1 | 441 | static DEVICE_ATTR_RO(components); |
d569d5bb | 442 | |
967f7bab DW |
443 | static ssize_t id_show(struct device *cdev, |
444 | struct device_attribute *attr, | |
445 | char *buf) | |
446 | { | |
447 | struct enclosure_device *edev = to_enclosure_device(cdev); | |
448 | ||
449 | if (edev->cb->show_id) | |
450 | return edev->cb->show_id(edev, buf); | |
451 | return -EINVAL; | |
452 | } | |
453 | static DEVICE_ATTR_RO(id); | |
454 | ||
899826f1 GKH |
455 | static struct attribute *enclosure_class_attrs[] = { |
456 | &dev_attr_components.attr, | |
967f7bab | 457 | &dev_attr_id.attr, |
899826f1 | 458 | NULL, |
d569d5bb | 459 | }; |
899826f1 | 460 | ATTRIBUTE_GROUPS(enclosure_class); |
d569d5bb JB |
461 | |
462 | static struct class enclosure_class = { | |
463 | .name = "enclosure", | |
464 | .owner = THIS_MODULE, | |
ee959b00 | 465 | .dev_release = enclosure_release, |
899826f1 | 466 | .dev_groups = enclosure_class_groups, |
d569d5bb JB |
467 | }; |
468 | ||
367ef846 | 469 | static const char *const enclosure_status[] = { |
d569d5bb JB |
470 | [ENCLOSURE_STATUS_UNSUPPORTED] = "unsupported", |
471 | [ENCLOSURE_STATUS_OK] = "OK", | |
472 | [ENCLOSURE_STATUS_CRITICAL] = "critical", | |
473 | [ENCLOSURE_STATUS_NON_CRITICAL] = "non-critical", | |
474 | [ENCLOSURE_STATUS_UNRECOVERABLE] = "unrecoverable", | |
475 | [ENCLOSURE_STATUS_NOT_INSTALLED] = "not installed", | |
476 | [ENCLOSURE_STATUS_UNKNOWN] = "unknown", | |
477 | [ENCLOSURE_STATUS_UNAVAILABLE] = "unavailable", | |
cc9b2e9f | 478 | [ENCLOSURE_STATUS_MAX] = NULL, |
d569d5bb JB |
479 | }; |
480 | ||
367ef846 | 481 | static const char *const enclosure_type[] = { |
d569d5bb JB |
482 | [ENCLOSURE_COMPONENT_DEVICE] = "device", |
483 | [ENCLOSURE_COMPONENT_ARRAY_DEVICE] = "array device", | |
484 | }; | |
485 | ||
ee959b00 TJ |
486 | static ssize_t get_component_fault(struct device *cdev, |
487 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
488 | { |
489 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
490 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
491 | ||
492 | if (edev->cb->get_fault) | |
493 | edev->cb->get_fault(edev, ecomp); | |
494 | return snprintf(buf, 40, "%d\n", ecomp->fault); | |
495 | } | |
496 | ||
ee959b00 TJ |
497 | static ssize_t set_component_fault(struct device *cdev, |
498 | struct device_attribute *attr, | |
499 | const char *buf, size_t count) | |
d569d5bb JB |
500 | { |
501 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
502 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
503 | int val = simple_strtoul(buf, NULL, 0); | |
504 | ||
505 | if (edev->cb->set_fault) | |
506 | edev->cb->set_fault(edev, ecomp, val); | |
507 | return count; | |
508 | } | |
509 | ||
ee959b00 TJ |
510 | static ssize_t get_component_status(struct device *cdev, |
511 | struct device_attribute *attr,char *buf) | |
d569d5bb JB |
512 | { |
513 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
514 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
515 | ||
516 | if (edev->cb->get_status) | |
517 | edev->cb->get_status(edev, ecomp); | |
518 | return snprintf(buf, 40, "%s\n", enclosure_status[ecomp->status]); | |
519 | } | |
520 | ||
ee959b00 TJ |
521 | static ssize_t set_component_status(struct device *cdev, |
522 | struct device_attribute *attr, | |
523 | const char *buf, size_t count) | |
d569d5bb JB |
524 | { |
525 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
526 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
527 | int i; | |
528 | ||
529 | for (i = 0; enclosure_status[i]; i++) { | |
530 | if (strncmp(buf, enclosure_status[i], | |
531 | strlen(enclosure_status[i])) == 0 && | |
532 | (buf[strlen(enclosure_status[i])] == '\n' || | |
533 | buf[strlen(enclosure_status[i])] == '\0')) | |
534 | break; | |
535 | } | |
536 | ||
537 | if (enclosure_status[i] && edev->cb->set_status) { | |
538 | edev->cb->set_status(edev, ecomp, i); | |
539 | return count; | |
540 | } else | |
541 | return -EINVAL; | |
542 | } | |
543 | ||
ee959b00 TJ |
544 | static ssize_t get_component_active(struct device *cdev, |
545 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
546 | { |
547 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
548 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
549 | ||
550 | if (edev->cb->get_active) | |
551 | edev->cb->get_active(edev, ecomp); | |
552 | return snprintf(buf, 40, "%d\n", ecomp->active); | |
553 | } | |
554 | ||
ee959b00 TJ |
555 | static ssize_t set_component_active(struct device *cdev, |
556 | struct device_attribute *attr, | |
557 | const char *buf, size_t count) | |
d569d5bb JB |
558 | { |
559 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
560 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
561 | int val = simple_strtoul(buf, NULL, 0); | |
562 | ||
563 | if (edev->cb->set_active) | |
564 | edev->cb->set_active(edev, ecomp, val); | |
565 | return count; | |
566 | } | |
567 | ||
ee959b00 TJ |
568 | static ssize_t get_component_locate(struct device *cdev, |
569 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
570 | { |
571 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
572 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
573 | ||
574 | if (edev->cb->get_locate) | |
575 | edev->cb->get_locate(edev, ecomp); | |
576 | return snprintf(buf, 40, "%d\n", ecomp->locate); | |
577 | } | |
578 | ||
ee959b00 TJ |
579 | static ssize_t set_component_locate(struct device *cdev, |
580 | struct device_attribute *attr, | |
581 | const char *buf, size_t count) | |
d569d5bb JB |
582 | { |
583 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
584 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
585 | int val = simple_strtoul(buf, NULL, 0); | |
586 | ||
587 | if (edev->cb->set_locate) | |
588 | edev->cb->set_locate(edev, ecomp, val); | |
589 | return count; | |
590 | } | |
591 | ||
08024885 SL |
592 | static ssize_t get_component_power_status(struct device *cdev, |
593 | struct device_attribute *attr, | |
594 | char *buf) | |
595 | { | |
596 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
597 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
598 | ||
599 | if (edev->cb->get_power_status) | |
600 | edev->cb->get_power_status(edev, ecomp); | |
75106523 MFO |
601 | |
602 | /* If still uninitialized, the callback failed or does not exist. */ | |
603 | if (ecomp->power_status == -1) | |
604 | return (edev->cb->get_power_status) ? -EIO : -ENOTTY; | |
605 | ||
08024885 SL |
606 | return snprintf(buf, 40, "%s\n", ecomp->power_status ? "on" : "off"); |
607 | } | |
608 | ||
609 | static ssize_t set_component_power_status(struct device *cdev, | |
610 | struct device_attribute *attr, | |
611 | const char *buf, size_t count) | |
612 | { | |
613 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
614 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
615 | int val; | |
616 | ||
617 | if (strncmp(buf, "on", 2) == 0 && | |
618 | (buf[2] == '\n' || buf[2] == '\0')) | |
619 | val = 1; | |
620 | else if (strncmp(buf, "off", 3) == 0 && | |
621 | (buf[3] == '\n' || buf[3] == '\0')) | |
622 | val = 0; | |
623 | else | |
624 | return -EINVAL; | |
625 | ||
626 | if (edev->cb->set_power_status) | |
627 | edev->cb->set_power_status(edev, ecomp, val); | |
628 | return count; | |
629 | } | |
630 | ||
ee959b00 TJ |
631 | static ssize_t get_component_type(struct device *cdev, |
632 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
633 | { |
634 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
635 | ||
636 | return snprintf(buf, 40, "%s\n", enclosure_type[ecomp->type]); | |
637 | } | |
638 | ||
921ce7f5 DW |
639 | static ssize_t get_component_slot(struct device *cdev, |
640 | struct device_attribute *attr, char *buf) | |
641 | { | |
642 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
643 | int slot; | |
644 | ||
645 | /* if the enclosure does not override then use 'number' as a stand-in */ | |
646 | if (ecomp->slot >= 0) | |
647 | slot = ecomp->slot; | |
648 | else | |
649 | slot = ecomp->number; | |
650 | ||
651 | return snprintf(buf, 40, "%d\n", slot); | |
652 | } | |
d569d5bb | 653 | |
cb6b7f40 JB |
654 | static DEVICE_ATTR(fault, S_IRUGO | S_IWUSR, get_component_fault, |
655 | set_component_fault); | |
656 | static DEVICE_ATTR(status, S_IRUGO | S_IWUSR, get_component_status, | |
657 | set_component_status); | |
658 | static DEVICE_ATTR(active, S_IRUGO | S_IWUSR, get_component_active, | |
659 | set_component_active); | |
660 | static DEVICE_ATTR(locate, S_IRUGO | S_IWUSR, get_component_locate, | |
661 | set_component_locate); | |
08024885 SL |
662 | static DEVICE_ATTR(power_status, S_IRUGO | S_IWUSR, get_component_power_status, |
663 | set_component_power_status); | |
cb6b7f40 | 664 | static DEVICE_ATTR(type, S_IRUGO, get_component_type, NULL); |
921ce7f5 | 665 | static DEVICE_ATTR(slot, S_IRUGO, get_component_slot, NULL); |
cb6b7f40 JB |
666 | |
667 | static struct attribute *enclosure_component_attrs[] = { | |
668 | &dev_attr_fault.attr, | |
669 | &dev_attr_status.attr, | |
670 | &dev_attr_active.attr, | |
671 | &dev_attr_locate.attr, | |
08024885 | 672 | &dev_attr_power_status.attr, |
cb6b7f40 | 673 | &dev_attr_type.attr, |
921ce7f5 | 674 | &dev_attr_slot.attr, |
cb6b7f40 | 675 | NULL |
d569d5bb | 676 | }; |
899826f1 | 677 | ATTRIBUTE_GROUPS(enclosure_component); |
d569d5bb JB |
678 | |
679 | static int __init enclosure_init(void) | |
680 | { | |
750b54de | 681 | return class_register(&enclosure_class); |
d569d5bb JB |
682 | } |
683 | ||
684 | static void __exit enclosure_exit(void) | |
685 | { | |
d569d5bb JB |
686 | class_unregister(&enclosure_class); |
687 | } | |
688 | ||
689 | module_init(enclosure_init); | |
690 | module_exit(enclosure_exit); | |
691 | ||
692 | MODULE_AUTHOR("James Bottomley"); | |
693 | MODULE_DESCRIPTION("Enclosure Services"); | |
694 | MODULE_LICENSE("GPL v2"); |