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82c29810 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
d569d5bb JB |
2 | /* |
3 | * Enclosure Services | |
4 | * | |
5 | * Copyright (C) 2008 James Bottomley <James.Bottomley@HansenPartnership.com> | |
6 | * | |
7 | **----------------------------------------------------------------------------- | |
8 | ** | |
d569d5bb JB |
9 | ** |
10 | **----------------------------------------------------------------------------- | |
11 | */ | |
12 | #include <linux/device.h> | |
13 | #include <linux/enclosure.h> | |
14 | #include <linux/err.h> | |
15 | #include <linux/list.h> | |
16 | #include <linux/kernel.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/mutex.h> | |
5a0e3ad6 | 19 | #include <linux/slab.h> |
d569d5bb JB |
20 | |
21 | static LIST_HEAD(container_list); | |
22 | static DEFINE_MUTEX(container_list_lock); | |
23 | static struct class enclosure_class; | |
d569d5bb JB |
24 | |
25 | /** | |
163f52b6 JB |
26 | * enclosure_find - find an enclosure given a parent device |
27 | * @dev: the parent to match against | |
28 | * @start: Optional enclosure device to start from (NULL if none) | |
d569d5bb | 29 | * |
163f52b6 JB |
30 | * Looks through the list of registered enclosures to find all those |
31 | * with @dev as a parent. Returns NULL if no enclosure is | |
32 | * found. @start can be used as a starting point to obtain multiple | |
33 | * enclosures per parent (should begin with NULL and then be set to | |
34 | * each returned enclosure device). Obtains a reference to the | |
35 | * enclosure class device which must be released with device_put(). | |
36 | * If @start is not NULL, a reference must be taken on it which is | |
37 | * released before returning (this allows a loop through all | |
38 | * enclosures to exit with only the reference on the enclosure of | |
39 | * interest held). Note that the @dev may correspond to the actual | |
40 | * device housing the enclosure, in which case no iteration via @start | |
41 | * is required. | |
d569d5bb | 42 | */ |
163f52b6 JB |
43 | struct enclosure_device *enclosure_find(struct device *dev, |
44 | struct enclosure_device *start) | |
d569d5bb | 45 | { |
ee959b00 | 46 | struct enclosure_device *edev; |
d569d5bb JB |
47 | |
48 | mutex_lock(&container_list_lock); | |
163f52b6 JB |
49 | edev = list_prepare_entry(start, &container_list, node); |
50 | if (start) | |
51 | put_device(&start->edev); | |
52 | ||
53 | list_for_each_entry_continue(edev, &container_list, node) { | |
54 | struct device *parent = edev->edev.parent; | |
55 | /* parent might not be immediate, so iterate up to | |
56 | * the root of the tree if necessary */ | |
57 | while (parent) { | |
58 | if (parent == dev) { | |
59 | get_device(&edev->edev); | |
60 | mutex_unlock(&container_list_lock); | |
61 | return edev; | |
62 | } | |
63 | parent = parent->parent; | |
d569d5bb JB |
64 | } |
65 | } | |
66 | mutex_unlock(&container_list_lock); | |
67 | ||
68 | return NULL; | |
69 | } | |
70 | EXPORT_SYMBOL_GPL(enclosure_find); | |
71 | ||
72 | /** | |
73 | * enclosure_for_each_device - calls a function for each enclosure | |
74 | * @fn: the function to call | |
75 | * @data: the data to pass to each call | |
76 | * | |
77 | * Loops over all the enclosures calling the function. | |
78 | * | |
79 | * Note, this function uses a mutex which will be held across calls to | |
80 | * @fn, so it must have non atomic context, and @fn may (although it | |
81 | * should not) sleep or otherwise cause the mutex to be held for | |
82 | * indefinite periods | |
83 | */ | |
84 | int enclosure_for_each_device(int (*fn)(struct enclosure_device *, void *), | |
85 | void *data) | |
86 | { | |
87 | int error = 0; | |
88 | struct enclosure_device *edev; | |
89 | ||
90 | mutex_lock(&container_list_lock); | |
91 | list_for_each_entry(edev, &container_list, node) { | |
92 | error = fn(edev, data); | |
93 | if (error) | |
94 | break; | |
95 | } | |
96 | mutex_unlock(&container_list_lock); | |
97 | ||
98 | return error; | |
99 | } | |
100 | EXPORT_SYMBOL_GPL(enclosure_for_each_device); | |
101 | ||
102 | /** | |
103 | * enclosure_register - register device as an enclosure | |
104 | * | |
105 | * @dev: device containing the enclosure | |
106 | * @components: number of components in the enclosure | |
107 | * | |
108 | * This sets up the device for being an enclosure. Note that @dev does | |
109 | * not have to be a dedicated enclosure device. It may be some other type | |
110 | * of device that additionally responds to enclosure services | |
111 | */ | |
112 | struct enclosure_device * | |
113 | enclosure_register(struct device *dev, const char *name, int components, | |
114 | struct enclosure_component_callbacks *cb) | |
115 | { | |
116 | struct enclosure_device *edev = | |
e3575c12 | 117 | kzalloc(struct_size(edev, component, components), GFP_KERNEL); |
d569d5bb JB |
118 | int err, i; |
119 | ||
120 | BUG_ON(!cb); | |
121 | ||
122 | if (!edev) | |
123 | return ERR_PTR(-ENOMEM); | |
124 | ||
125 | edev->components = components; | |
126 | ||
ee959b00 TJ |
127 | edev->edev.class = &enclosure_class; |
128 | edev->edev.parent = get_device(dev); | |
d569d5bb | 129 | edev->cb = cb; |
5e43754f | 130 | dev_set_name(&edev->edev, "%s", name); |
ee959b00 | 131 | err = device_register(&edev->edev); |
d569d5bb JB |
132 | if (err) |
133 | goto err; | |
134 | ||
921ce7f5 | 135 | for (i = 0; i < components; i++) { |
d569d5bb | 136 | edev->component[i].number = -1; |
921ce7f5 | 137 | edev->component[i].slot = -1; |
75106523 | 138 | edev->component[i].power_status = -1; |
921ce7f5 | 139 | } |
d569d5bb JB |
140 | |
141 | mutex_lock(&container_list_lock); | |
142 | list_add_tail(&edev->node, &container_list); | |
143 | mutex_unlock(&container_list_lock); | |
144 | ||
145 | return edev; | |
146 | ||
147 | err: | |
ee959b00 | 148 | put_device(edev->edev.parent); |
d569d5bb JB |
149 | kfree(edev); |
150 | return ERR_PTR(err); | |
151 | } | |
152 | EXPORT_SYMBOL_GPL(enclosure_register); | |
153 | ||
154 | static struct enclosure_component_callbacks enclosure_null_callbacks; | |
155 | ||
156 | /** | |
157 | * enclosure_unregister - remove an enclosure | |
158 | * | |
159 | * @edev: the registered enclosure to remove; | |
160 | */ | |
161 | void enclosure_unregister(struct enclosure_device *edev) | |
162 | { | |
163 | int i; | |
164 | ||
165 | mutex_lock(&container_list_lock); | |
166 | list_del(&edev->node); | |
167 | mutex_unlock(&container_list_lock); | |
168 | ||
169 | for (i = 0; i < edev->components; i++) | |
170 | if (edev->component[i].number != -1) | |
ee959b00 | 171 | device_unregister(&edev->component[i].cdev); |
d569d5bb JB |
172 | |
173 | /* prevent any callbacks into service user */ | |
174 | edev->cb = &enclosure_null_callbacks; | |
ee959b00 | 175 | device_unregister(&edev->edev); |
d569d5bb JB |
176 | } |
177 | EXPORT_SYMBOL_GPL(enclosure_unregister); | |
178 | ||
cb6b7f40 | 179 | #define ENCLOSURE_NAME_SIZE 64 |
d2fd76e6 | 180 | #define COMPONENT_NAME_SIZE 64 |
cb6b7f40 JB |
181 | |
182 | static void enclosure_link_name(struct enclosure_component *cdev, char *name) | |
183 | { | |
184 | strcpy(name, "enclosure_device:"); | |
71610f55 | 185 | strcat(name, dev_name(&cdev->cdev)); |
cb6b7f40 JB |
186 | } |
187 | ||
188 | static void enclosure_remove_links(struct enclosure_component *cdev) | |
189 | { | |
190 | char name[ENCLOSURE_NAME_SIZE]; | |
191 | ||
11e52a69 JB |
192 | enclosure_link_name(cdev, name); |
193 | ||
a1470c7b JB |
194 | /* |
195 | * In odd circumstances, like multipath devices, something else may | |
196 | * already have removed the links, so check for this condition first. | |
197 | */ | |
11e52a69 JB |
198 | if (cdev->dev->kobj.sd) |
199 | sysfs_remove_link(&cdev->dev->kobj, name); | |
a1470c7b | 200 | |
11e52a69 JB |
201 | if (cdev->cdev.kobj.sd) |
202 | sysfs_remove_link(&cdev->cdev.kobj, "device"); | |
cb6b7f40 JB |
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 | ||
d2fd76e6 MS |
241 | static struct enclosure_component * |
242 | enclosure_component_find_by_name(struct enclosure_device *edev, | |
243 | const char *name) | |
244 | { | |
245 | int i; | |
246 | const char *cname; | |
247 | struct enclosure_component *ecomp; | |
248 | ||
249 | if (!edev || !name || !name[0]) | |
250 | return NULL; | |
251 | ||
252 | for (i = 0; i < edev->components; i++) { | |
253 | ecomp = &edev->component[i]; | |
254 | cname = dev_name(&ecomp->cdev); | |
255 | if (ecomp->number != -1 && | |
256 | cname && cname[0] && | |
257 | !strcmp(cname, name)) | |
258 | return ecomp; | |
259 | } | |
260 | ||
261 | return NULL; | |
262 | } | |
263 | ||
899826f1 | 264 | static const struct attribute_group *enclosure_component_groups[]; |
cb6b7f40 | 265 | |
d569d5bb | 266 | /** |
ed09dcc8 | 267 | * enclosure_component_alloc - prepare a new enclosure component |
d569d5bb JB |
268 | * @edev: the enclosure to add the component |
269 | * @num: the device number | |
270 | * @type: the type of component being added | |
271 | * @name: an optional name to appear in sysfs (leave NULL if none) | |
272 | * | |
ed09dcc8 DW |
273 | * The name is optional for enclosures that give their components a unique |
274 | * name. If not, leave the field NULL and a name will be assigned. | |
d569d5bb JB |
275 | * |
276 | * Returns a pointer to the enclosure component or an error. | |
277 | */ | |
278 | struct enclosure_component * | |
ed09dcc8 DW |
279 | enclosure_component_alloc(struct enclosure_device *edev, |
280 | unsigned int number, | |
281 | enum enclosure_component_type type, | |
282 | const char *name) | |
d569d5bb JB |
283 | { |
284 | struct enclosure_component *ecomp; | |
ee959b00 | 285 | struct device *cdev; |
ed09dcc8 | 286 | int i; |
d2fd76e6 | 287 | char newname[COMPONENT_NAME_SIZE]; |
d569d5bb JB |
288 | |
289 | if (number >= edev->components) | |
290 | return ERR_PTR(-EINVAL); | |
291 | ||
292 | ecomp = &edev->component[number]; | |
293 | ||
294 | if (ecomp->number != -1) | |
295 | return ERR_PTR(-EINVAL); | |
296 | ||
297 | ecomp->type = type; | |
298 | ecomp->number = number; | |
299 | cdev = &ecomp->cdev; | |
ee959b00 | 300 | cdev->parent = get_device(&edev->edev); |
d2fd76e6 MS |
301 | |
302 | if (name && name[0]) { | |
303 | /* Some hardware (e.g. enclosure in RX300 S6) has components | |
304 | * with non unique names. Registering duplicates in sysfs | |
305 | * will lead to warnings during bootup. So make the names | |
306 | * unique by appending consecutive numbers -1, -2, ... */ | |
307 | i = 1; | |
308 | snprintf(newname, COMPONENT_NAME_SIZE, | |
309 | "%s", name); | |
310 | while (enclosure_component_find_by_name(edev, newname)) | |
311 | snprintf(newname, COMPONENT_NAME_SIZE, | |
312 | "%s-%i", name, i++); | |
313 | dev_set_name(cdev, "%s", newname); | |
314 | } else | |
71610f55 | 315 | dev_set_name(cdev, "%u", number); |
d569d5bb | 316 | |
cb6b7f40 | 317 | cdev->release = enclosure_component_release; |
899826f1 | 318 | cdev->groups = enclosure_component_groups; |
cb6b7f40 | 319 | |
ed09dcc8 DW |
320 | return ecomp; |
321 | } | |
322 | EXPORT_SYMBOL_GPL(enclosure_component_alloc); | |
323 | ||
324 | /** | |
325 | * enclosure_component_register - publishes an initialized enclosure component | |
326 | * @ecomp: component to add | |
327 | * | |
328 | * Returns 0 on successful registration, releases the component otherwise | |
329 | */ | |
330 | int enclosure_component_register(struct enclosure_component *ecomp) | |
331 | { | |
332 | struct device *cdev; | |
333 | int err; | |
334 | ||
335 | cdev = &ecomp->cdev; | |
ee959b00 | 336 | err = device_register(cdev); |
a91c1be2 JB |
337 | if (err) { |
338 | ecomp->number = -1; | |
339 | put_device(cdev); | |
ed09dcc8 | 340 | return err; |
a91c1be2 | 341 | } |
d569d5bb | 342 | |
ed09dcc8 | 343 | return 0; |
d569d5bb JB |
344 | } |
345 | EXPORT_SYMBOL_GPL(enclosure_component_register); | |
346 | ||
347 | /** | |
348 | * enclosure_add_device - add a device as being part of an enclosure | |
349 | * @edev: the enclosure device being added to. | |
350 | * @num: the number of the component | |
351 | * @dev: the device being added | |
352 | * | |
353 | * Declares a real device to reside in slot (or identifier) @num of an | |
354 | * enclosure. This will cause the relevant sysfs links to appear. | |
355 | * This function may also be used to change a device associated with | |
356 | * an enclosure without having to call enclosure_remove_device() in | |
357 | * between. | |
358 | * | |
359 | * Returns zero on success or an error. | |
360 | */ | |
361 | int enclosure_add_device(struct enclosure_device *edev, int component, | |
362 | struct device *dev) | |
363 | { | |
ee959b00 | 364 | struct enclosure_component *cdev; |
62e62ffd | 365 | int err; |
d569d5bb JB |
366 | |
367 | if (!edev || component >= edev->components) | |
368 | return -EINVAL; | |
369 | ||
ee959b00 | 370 | cdev = &edev->component[component]; |
d569d5bb | 371 | |
21fab1d0 JB |
372 | if (cdev->dev == dev) |
373 | return -EEXIST; | |
374 | ||
62e62ffd | 375 | if (cdev->dev) { |
cb6b7f40 | 376 | enclosure_remove_links(cdev); |
62e62ffd ML |
377 | put_device(cdev->dev); |
378 | } | |
d569d5bb | 379 | cdev->dev = get_device(dev); |
62e62ffd ML |
380 | err = enclosure_add_links(cdev); |
381 | if (err) { | |
382 | put_device(cdev->dev); | |
383 | cdev->dev = NULL; | |
384 | } | |
385 | return err; | |
d569d5bb JB |
386 | } |
387 | EXPORT_SYMBOL_GPL(enclosure_add_device); | |
388 | ||
389 | /** | |
390 | * enclosure_remove_device - remove a device from an enclosure | |
391 | * @edev: the enclosure device | |
392 | * @num: the number of the component to remove | |
393 | * | |
394 | * Returns zero on success or an error. | |
395 | * | |
396 | */ | |
43d8eb9c | 397 | int enclosure_remove_device(struct enclosure_device *edev, struct device *dev) |
d569d5bb | 398 | { |
ee959b00 | 399 | struct enclosure_component *cdev; |
43d8eb9c | 400 | int i; |
d569d5bb | 401 | |
43d8eb9c | 402 | if (!edev || !dev) |
d569d5bb JB |
403 | return -EINVAL; |
404 | ||
43d8eb9c JB |
405 | for (i = 0; i < edev->components; i++) { |
406 | cdev = &edev->component[i]; | |
407 | if (cdev->dev == dev) { | |
408 | enclosure_remove_links(cdev); | |
409 | device_del(&cdev->cdev); | |
410 | put_device(dev); | |
411 | cdev->dev = NULL; | |
412 | return device_add(&cdev->cdev); | |
413 | } | |
414 | } | |
415 | return -ENODEV; | |
d569d5bb JB |
416 | } |
417 | EXPORT_SYMBOL_GPL(enclosure_remove_device); | |
418 | ||
419 | /* | |
420 | * sysfs pieces below | |
421 | */ | |
422 | ||
899826f1 GKH |
423 | static ssize_t components_show(struct device *cdev, |
424 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
425 | { |
426 | struct enclosure_device *edev = to_enclosure_device(cdev); | |
427 | ||
428 | return snprintf(buf, 40, "%d\n", edev->components); | |
429 | } | |
899826f1 | 430 | static DEVICE_ATTR_RO(components); |
d569d5bb | 431 | |
967f7bab DW |
432 | static ssize_t id_show(struct device *cdev, |
433 | struct device_attribute *attr, | |
434 | char *buf) | |
435 | { | |
436 | struct enclosure_device *edev = to_enclosure_device(cdev); | |
437 | ||
438 | if (edev->cb->show_id) | |
439 | return edev->cb->show_id(edev, buf); | |
440 | return -EINVAL; | |
441 | } | |
442 | static DEVICE_ATTR_RO(id); | |
443 | ||
899826f1 GKH |
444 | static struct attribute *enclosure_class_attrs[] = { |
445 | &dev_attr_components.attr, | |
967f7bab | 446 | &dev_attr_id.attr, |
899826f1 | 447 | NULL, |
d569d5bb | 448 | }; |
899826f1 | 449 | ATTRIBUTE_GROUPS(enclosure_class); |
d569d5bb JB |
450 | |
451 | static struct class enclosure_class = { | |
452 | .name = "enclosure", | |
453 | .owner = THIS_MODULE, | |
ee959b00 | 454 | .dev_release = enclosure_release, |
899826f1 | 455 | .dev_groups = enclosure_class_groups, |
d569d5bb JB |
456 | }; |
457 | ||
367ef846 | 458 | static const char *const enclosure_status[] = { |
d569d5bb JB |
459 | [ENCLOSURE_STATUS_UNSUPPORTED] = "unsupported", |
460 | [ENCLOSURE_STATUS_OK] = "OK", | |
461 | [ENCLOSURE_STATUS_CRITICAL] = "critical", | |
462 | [ENCLOSURE_STATUS_NON_CRITICAL] = "non-critical", | |
463 | [ENCLOSURE_STATUS_UNRECOVERABLE] = "unrecoverable", | |
464 | [ENCLOSURE_STATUS_NOT_INSTALLED] = "not installed", | |
465 | [ENCLOSURE_STATUS_UNKNOWN] = "unknown", | |
466 | [ENCLOSURE_STATUS_UNAVAILABLE] = "unavailable", | |
cc9b2e9f | 467 | [ENCLOSURE_STATUS_MAX] = NULL, |
d569d5bb JB |
468 | }; |
469 | ||
367ef846 | 470 | static const char *const enclosure_type[] = { |
d569d5bb JB |
471 | [ENCLOSURE_COMPONENT_DEVICE] = "device", |
472 | [ENCLOSURE_COMPONENT_ARRAY_DEVICE] = "array device", | |
473 | }; | |
474 | ||
ee959b00 TJ |
475 | static ssize_t get_component_fault(struct device *cdev, |
476 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
477 | { |
478 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
479 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
480 | ||
481 | if (edev->cb->get_fault) | |
482 | edev->cb->get_fault(edev, ecomp); | |
483 | return snprintf(buf, 40, "%d\n", ecomp->fault); | |
484 | } | |
485 | ||
ee959b00 TJ |
486 | static ssize_t set_component_fault(struct device *cdev, |
487 | struct device_attribute *attr, | |
488 | const char *buf, size_t count) | |
d569d5bb JB |
489 | { |
490 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
491 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
492 | int val = simple_strtoul(buf, NULL, 0); | |
493 | ||
494 | if (edev->cb->set_fault) | |
495 | edev->cb->set_fault(edev, ecomp, val); | |
496 | return count; | |
497 | } | |
498 | ||
ee959b00 TJ |
499 | static ssize_t get_component_status(struct device *cdev, |
500 | struct device_attribute *attr,char *buf) | |
d569d5bb JB |
501 | { |
502 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
503 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
504 | ||
505 | if (edev->cb->get_status) | |
506 | edev->cb->get_status(edev, ecomp); | |
507 | return snprintf(buf, 40, "%s\n", enclosure_status[ecomp->status]); | |
508 | } | |
509 | ||
ee959b00 TJ |
510 | static ssize_t set_component_status(struct device *cdev, |
511 | struct device_attribute *attr, | |
512 | const char *buf, size_t count) | |
d569d5bb JB |
513 | { |
514 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
515 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
516 | int i; | |
517 | ||
518 | for (i = 0; enclosure_status[i]; i++) { | |
519 | if (strncmp(buf, enclosure_status[i], | |
520 | strlen(enclosure_status[i])) == 0 && | |
521 | (buf[strlen(enclosure_status[i])] == '\n' || | |
522 | buf[strlen(enclosure_status[i])] == '\0')) | |
523 | break; | |
524 | } | |
525 | ||
526 | if (enclosure_status[i] && edev->cb->set_status) { | |
527 | edev->cb->set_status(edev, ecomp, i); | |
528 | return count; | |
529 | } else | |
530 | return -EINVAL; | |
531 | } | |
532 | ||
ee959b00 TJ |
533 | static ssize_t get_component_active(struct device *cdev, |
534 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
535 | { |
536 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
537 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
538 | ||
539 | if (edev->cb->get_active) | |
540 | edev->cb->get_active(edev, ecomp); | |
541 | return snprintf(buf, 40, "%d\n", ecomp->active); | |
542 | } | |
543 | ||
ee959b00 TJ |
544 | static ssize_t set_component_active(struct device *cdev, |
545 | struct device_attribute *attr, | |
546 | const char *buf, size_t count) | |
d569d5bb JB |
547 | { |
548 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
549 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
550 | int val = simple_strtoul(buf, NULL, 0); | |
551 | ||
552 | if (edev->cb->set_active) | |
553 | edev->cb->set_active(edev, ecomp, val); | |
554 | return count; | |
555 | } | |
556 | ||
ee959b00 TJ |
557 | static ssize_t get_component_locate(struct device *cdev, |
558 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
559 | { |
560 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
561 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
562 | ||
563 | if (edev->cb->get_locate) | |
564 | edev->cb->get_locate(edev, ecomp); | |
565 | return snprintf(buf, 40, "%d\n", ecomp->locate); | |
566 | } | |
567 | ||
ee959b00 TJ |
568 | static ssize_t set_component_locate(struct device *cdev, |
569 | struct device_attribute *attr, | |
570 | const char *buf, size_t count) | |
d569d5bb JB |
571 | { |
572 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
573 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
574 | int val = simple_strtoul(buf, NULL, 0); | |
575 | ||
576 | if (edev->cb->set_locate) | |
577 | edev->cb->set_locate(edev, ecomp, val); | |
578 | return count; | |
579 | } | |
580 | ||
08024885 SL |
581 | static ssize_t get_component_power_status(struct device *cdev, |
582 | struct device_attribute *attr, | |
583 | char *buf) | |
584 | { | |
585 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
586 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
587 | ||
588 | if (edev->cb->get_power_status) | |
589 | edev->cb->get_power_status(edev, ecomp); | |
75106523 MFO |
590 | |
591 | /* If still uninitialized, the callback failed or does not exist. */ | |
592 | if (ecomp->power_status == -1) | |
593 | return (edev->cb->get_power_status) ? -EIO : -ENOTTY; | |
594 | ||
08024885 SL |
595 | return snprintf(buf, 40, "%s\n", ecomp->power_status ? "on" : "off"); |
596 | } | |
597 | ||
598 | static ssize_t set_component_power_status(struct device *cdev, | |
599 | struct device_attribute *attr, | |
600 | const char *buf, size_t count) | |
601 | { | |
602 | struct enclosure_device *edev = to_enclosure_device(cdev->parent); | |
603 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
604 | int val; | |
605 | ||
606 | if (strncmp(buf, "on", 2) == 0 && | |
607 | (buf[2] == '\n' || buf[2] == '\0')) | |
608 | val = 1; | |
609 | else if (strncmp(buf, "off", 3) == 0 && | |
610 | (buf[3] == '\n' || buf[3] == '\0')) | |
611 | val = 0; | |
612 | else | |
613 | return -EINVAL; | |
614 | ||
615 | if (edev->cb->set_power_status) | |
616 | edev->cb->set_power_status(edev, ecomp, val); | |
617 | return count; | |
618 | } | |
619 | ||
ee959b00 TJ |
620 | static ssize_t get_component_type(struct device *cdev, |
621 | struct device_attribute *attr, char *buf) | |
d569d5bb JB |
622 | { |
623 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
624 | ||
625 | return snprintf(buf, 40, "%s\n", enclosure_type[ecomp->type]); | |
626 | } | |
627 | ||
921ce7f5 DW |
628 | static ssize_t get_component_slot(struct device *cdev, |
629 | struct device_attribute *attr, char *buf) | |
630 | { | |
631 | struct enclosure_component *ecomp = to_enclosure_component(cdev); | |
632 | int slot; | |
633 | ||
634 | /* if the enclosure does not override then use 'number' as a stand-in */ | |
635 | if (ecomp->slot >= 0) | |
636 | slot = ecomp->slot; | |
637 | else | |
638 | slot = ecomp->number; | |
639 | ||
640 | return snprintf(buf, 40, "%d\n", slot); | |
641 | } | |
d569d5bb | 642 | |
cb6b7f40 JB |
643 | static DEVICE_ATTR(fault, S_IRUGO | S_IWUSR, get_component_fault, |
644 | set_component_fault); | |
645 | static DEVICE_ATTR(status, S_IRUGO | S_IWUSR, get_component_status, | |
646 | set_component_status); | |
647 | static DEVICE_ATTR(active, S_IRUGO | S_IWUSR, get_component_active, | |
648 | set_component_active); | |
649 | static DEVICE_ATTR(locate, S_IRUGO | S_IWUSR, get_component_locate, | |
650 | set_component_locate); | |
08024885 SL |
651 | static DEVICE_ATTR(power_status, S_IRUGO | S_IWUSR, get_component_power_status, |
652 | set_component_power_status); | |
cb6b7f40 | 653 | static DEVICE_ATTR(type, S_IRUGO, get_component_type, NULL); |
921ce7f5 | 654 | static DEVICE_ATTR(slot, S_IRUGO, get_component_slot, NULL); |
cb6b7f40 JB |
655 | |
656 | static struct attribute *enclosure_component_attrs[] = { | |
657 | &dev_attr_fault.attr, | |
658 | &dev_attr_status.attr, | |
659 | &dev_attr_active.attr, | |
660 | &dev_attr_locate.attr, | |
08024885 | 661 | &dev_attr_power_status.attr, |
cb6b7f40 | 662 | &dev_attr_type.attr, |
921ce7f5 | 663 | &dev_attr_slot.attr, |
cb6b7f40 | 664 | NULL |
d569d5bb | 665 | }; |
899826f1 | 666 | ATTRIBUTE_GROUPS(enclosure_component); |
d569d5bb JB |
667 | |
668 | static int __init enclosure_init(void) | |
669 | { | |
750b54de | 670 | return class_register(&enclosure_class); |
d569d5bb JB |
671 | } |
672 | ||
673 | static void __exit enclosure_exit(void) | |
674 | { | |
d569d5bb JB |
675 | class_unregister(&enclosure_class); |
676 | } | |
677 | ||
678 | module_init(enclosure_init); | |
679 | module_exit(enclosure_exit); | |
680 | ||
681 | MODULE_AUTHOR("James Bottomley"); | |
682 | MODULE_DESCRIPTION("Enclosure Services"); | |
683 | MODULE_LICENSE("GPL v2"); |