blob: 180a5442fd4b8d0522cec564ed58cec51386b188 [file] [log] [blame]
James Bottomleyd569d5b2008-02-03 15:40:56 -06001/*
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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090030#include <linux/slab.h>
James Bottomleyd569d5b2008-02-03 15:40:56 -060031
32static LIST_HEAD(container_list);
33static DEFINE_MUTEX(container_list_lock);
34static struct class enclosure_class;
James Bottomleyd569d5b2008-02-03 15:40:56 -060035
36/**
James Bottomley163f52b2009-08-01 00:39:36 +000037 * 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)
James Bottomleyd569d5b2008-02-03 15:40:56 -060040 *
James Bottomley163f52b2009-08-01 00:39:36 +000041 * 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.
James Bottomleyd569d5b2008-02-03 15:40:56 -060053 */
James Bottomley163f52b2009-08-01 00:39:36 +000054struct enclosure_device *enclosure_find(struct device *dev,
55 struct enclosure_device *start)
James Bottomleyd569d5b2008-02-03 15:40:56 -060056{
Tony Jonesee959b02008-02-22 00:13:36 +010057 struct enclosure_device *edev;
James Bottomleyd569d5b2008-02-03 15:40:56 -060058
59 mutex_lock(&container_list_lock);
James Bottomley163f52b2009-08-01 00:39:36 +000060 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;
James Bottomleyd569d5b2008-02-03 15:40:56 -060075 }
76 }
77 mutex_unlock(&container_list_lock);
78
79 return NULL;
80}
81EXPORT_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 */
95int 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}
111EXPORT_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 */
123struct enclosure_device *
124enclosure_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
Tony Jonesee959b02008-02-22 00:13:36 +0100140 edev->edev.class = &enclosure_class;
141 edev->edev.parent = get_device(dev);
James Bottomleyd569d5b2008-02-03 15:40:56 -0600142 edev->cb = cb;
Yinghai Lu5e437542009-04-30 19:13:41 -0700143 dev_set_name(&edev->edev, "%s", name);
Tony Jonesee959b02008-02-22 00:13:36 +0100144 err = device_register(&edev->edev);
James Bottomleyd569d5b2008-02-03 15:40:56 -0600145 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:
Tony Jonesee959b02008-02-22 00:13:36 +0100158 put_device(edev->edev.parent);
James Bottomleyd569d5b2008-02-03 15:40:56 -0600159 kfree(edev);
160 return ERR_PTR(err);
161}
162EXPORT_SYMBOL_GPL(enclosure_register);
163
164static struct enclosure_component_callbacks enclosure_null_callbacks;
165
166/**
167 * enclosure_unregister - remove an enclosure
168 *
169 * @edev: the registered enclosure to remove;
170 */
171void 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)
Tony Jonesee959b02008-02-22 00:13:36 +0100181 device_unregister(&edev->component[i].cdev);
James Bottomleyd569d5b2008-02-03 15:40:56 -0600182
183 /* prevent any callbacks into service user */
184 edev->cb = &enclosure_null_callbacks;
Tony Jonesee959b02008-02-22 00:13:36 +0100185 device_unregister(&edev->edev);
James Bottomleyd569d5b2008-02-03 15:40:56 -0600186}
187EXPORT_SYMBOL_GPL(enclosure_unregister);
188
James Bottomleycb6b7f42008-03-15 13:01:40 -0500189#define ENCLOSURE_NAME_SIZE 64
Markus Stockhausend2fd76e2014-10-04 13:35:15 +0000190#define COMPONENT_NAME_SIZE 64
James Bottomleycb6b7f42008-03-15 13:01:40 -0500191
192static void enclosure_link_name(struct enclosure_component *cdev, char *name)
193{
194 strcpy(name, "enclosure_device:");
Kay Sievers71610f52008-12-03 22:41:36 +0100195 strcat(name, dev_name(&cdev->cdev));
James Bottomleycb6b7f42008-03-15 13:01:40 -0500196}
197
198static void enclosure_remove_links(struct enclosure_component *cdev)
199{
200 char name[ENCLOSURE_NAME_SIZE];
201
James Bottomleya1470c72013-11-15 14:58:00 -0800202 /*
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
James Bottomleycb6b7f42008-03-15 13:01:40 -0500209 enclosure_link_name(cdev, name);
210 sysfs_remove_link(&cdev->dev->kobj, name);
211 sysfs_remove_link(&cdev->cdev.kobj, "device");
212}
213
214static 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
Tony Jonesee959b02008-02-22 00:13:36 +0100231static void enclosure_release(struct device *cdev)
James Bottomleyd569d5b2008-02-03 15:40:56 -0600232{
233 struct enclosure_device *edev = to_enclosure_device(cdev);
234
Tony Jonesee959b02008-02-22 00:13:36 +0100235 put_device(cdev->parent);
James Bottomleyd569d5b2008-02-03 15:40:56 -0600236 kfree(edev);
237}
238
Tony Jonesee959b02008-02-22 00:13:36 +0100239static void enclosure_component_release(struct device *dev)
James Bottomleyd569d5b2008-02-03 15:40:56 -0600240{
Tony Jonesee959b02008-02-22 00:13:36 +0100241 struct enclosure_component *cdev = to_enclosure_component(dev);
242
James Bottomleycb6b7f42008-03-15 13:01:40 -0500243 if (cdev->dev) {
244 enclosure_remove_links(cdev);
245 put_device(cdev->dev);
246 }
Tony Jonesee959b02008-02-22 00:13:36 +0100247 put_device(dev->parent);
James Bottomleyd569d5b2008-02-03 15:40:56 -0600248}
249
Markus Stockhausend2fd76e2014-10-04 13:35:15 +0000250static struct enclosure_component *
251enclosure_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
Greg Kroah-Hartman899826f2013-07-24 15:05:16 -0700273static const struct attribute_group *enclosure_component_groups[];
James Bottomleycb6b7f42008-03-15 13:01:40 -0500274
James Bottomleyd569d5b2008-02-03 15:40:56 -0600275/**
276 * enclosure_component_register - add a particular component to an enclosure
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 *
282 * Registers the component. The name is optional for enclosures that
283 * give their components a unique name. If not, leave the field NULL
284 * and a name will be assigned.
285 *
286 * Returns a pointer to the enclosure component or an error.
287 */
288struct enclosure_component *
289enclosure_component_register(struct enclosure_device *edev,
290 unsigned int number,
291 enum enclosure_component_type type,
292 const char *name)
293{
294 struct enclosure_component *ecomp;
Tony Jonesee959b02008-02-22 00:13:36 +0100295 struct device *cdev;
Markus Stockhausend2fd76e2014-10-04 13:35:15 +0000296 int err, i;
297 char newname[COMPONENT_NAME_SIZE];
James Bottomleyd569d5b2008-02-03 15:40:56 -0600298
299 if (number >= edev->components)
300 return ERR_PTR(-EINVAL);
301
302 ecomp = &edev->component[number];
303
304 if (ecomp->number != -1)
305 return ERR_PTR(-EINVAL);
306
307 ecomp->type = type;
308 ecomp->number = number;
309 cdev = &ecomp->cdev;
Tony Jonesee959b02008-02-22 00:13:36 +0100310 cdev->parent = get_device(&edev->edev);
Markus Stockhausend2fd76e2014-10-04 13:35:15 +0000311
312 if (name && name[0]) {
313 /* Some hardware (e.g. enclosure in RX300 S6) has components
314 * with non unique names. Registering duplicates in sysfs
315 * will lead to warnings during bootup. So make the names
316 * unique by appending consecutive numbers -1, -2, ... */
317 i = 1;
318 snprintf(newname, COMPONENT_NAME_SIZE,
319 "%s", name);
320 while (enclosure_component_find_by_name(edev, newname))
321 snprintf(newname, COMPONENT_NAME_SIZE,
322 "%s-%i", name, i++);
323 dev_set_name(cdev, "%s", newname);
324 } else
Kay Sievers71610f52008-12-03 22:41:36 +0100325 dev_set_name(cdev, "%u", number);
James Bottomleyd569d5b2008-02-03 15:40:56 -0600326
James Bottomleycb6b7f42008-03-15 13:01:40 -0500327 cdev->release = enclosure_component_release;
Greg Kroah-Hartman899826f2013-07-24 15:05:16 -0700328 cdev->groups = enclosure_component_groups;
James Bottomleycb6b7f42008-03-15 13:01:40 -0500329
Tony Jonesee959b02008-02-22 00:13:36 +0100330 err = device_register(cdev);
James Bottomleya91c1be2010-03-12 16:14:42 -0600331 if (err) {
332 ecomp->number = -1;
333 put_device(cdev);
334 return ERR_PTR(err);
335 }
James Bottomleyd569d5b2008-02-03 15:40:56 -0600336
337 return ecomp;
338}
339EXPORT_SYMBOL_GPL(enclosure_component_register);
340
341/**
342 * enclosure_add_device - add a device as being part of an enclosure
343 * @edev: the enclosure device being added to.
344 * @num: the number of the component
345 * @dev: the device being added
346 *
347 * Declares a real device to reside in slot (or identifier) @num of an
348 * enclosure. This will cause the relevant sysfs links to appear.
349 * This function may also be used to change a device associated with
350 * an enclosure without having to call enclosure_remove_device() in
351 * between.
352 *
353 * Returns zero on success or an error.
354 */
355int enclosure_add_device(struct enclosure_device *edev, int component,
356 struct device *dev)
357{
Tony Jonesee959b02008-02-22 00:13:36 +0100358 struct enclosure_component *cdev;
James Bottomleyd569d5b2008-02-03 15:40:56 -0600359
360 if (!edev || component >= edev->components)
361 return -EINVAL;
362
Tony Jonesee959b02008-02-22 00:13:36 +0100363 cdev = &edev->component[component];
James Bottomleyd569d5b2008-02-03 15:40:56 -0600364
James Bottomley21fab1d2009-08-01 00:43:59 +0000365 if (cdev->dev == dev)
366 return -EEXIST;
367
James Bottomleycb6b7f42008-03-15 13:01:40 -0500368 if (cdev->dev)
369 enclosure_remove_links(cdev);
370
Tony Jonesee959b02008-02-22 00:13:36 +0100371 put_device(cdev->dev);
James Bottomleyd569d5b2008-02-03 15:40:56 -0600372 cdev->dev = get_device(dev);
James Bottomleycb6b7f42008-03-15 13:01:40 -0500373 return enclosure_add_links(cdev);
James Bottomleyd569d5b2008-02-03 15:40:56 -0600374}
375EXPORT_SYMBOL_GPL(enclosure_add_device);
376
377/**
378 * enclosure_remove_device - remove a device from an enclosure
379 * @edev: the enclosure device
380 * @num: the number of the component to remove
381 *
382 * Returns zero on success or an error.
383 *
384 */
James Bottomley43d8eb92009-08-01 00:41:22 +0000385int enclosure_remove_device(struct enclosure_device *edev, struct device *dev)
James Bottomleyd569d5b2008-02-03 15:40:56 -0600386{
Tony Jonesee959b02008-02-22 00:13:36 +0100387 struct enclosure_component *cdev;
James Bottomley43d8eb92009-08-01 00:41:22 +0000388 int i;
James Bottomleyd569d5b2008-02-03 15:40:56 -0600389
James Bottomley43d8eb92009-08-01 00:41:22 +0000390 if (!edev || !dev)
James Bottomleyd569d5b2008-02-03 15:40:56 -0600391 return -EINVAL;
392
James Bottomley43d8eb92009-08-01 00:41:22 +0000393 for (i = 0; i < edev->components; i++) {
394 cdev = &edev->component[i];
395 if (cdev->dev == dev) {
396 enclosure_remove_links(cdev);
397 device_del(&cdev->cdev);
398 put_device(dev);
399 cdev->dev = NULL;
400 return device_add(&cdev->cdev);
401 }
402 }
403 return -ENODEV;
James Bottomleyd569d5b2008-02-03 15:40:56 -0600404}
405EXPORT_SYMBOL_GPL(enclosure_remove_device);
406
407/*
408 * sysfs pieces below
409 */
410
Greg Kroah-Hartman899826f2013-07-24 15:05:16 -0700411static ssize_t components_show(struct device *cdev,
412 struct device_attribute *attr, char *buf)
James Bottomleyd569d5b2008-02-03 15:40:56 -0600413{
414 struct enclosure_device *edev = to_enclosure_device(cdev);
415
416 return snprintf(buf, 40, "%d\n", edev->components);
417}
Greg Kroah-Hartman899826f2013-07-24 15:05:16 -0700418static DEVICE_ATTR_RO(components);
James Bottomleyd569d5b2008-02-03 15:40:56 -0600419
Greg Kroah-Hartman899826f2013-07-24 15:05:16 -0700420static struct attribute *enclosure_class_attrs[] = {
421 &dev_attr_components.attr,
422 NULL,
James Bottomleyd569d5b2008-02-03 15:40:56 -0600423};
Greg Kroah-Hartman899826f2013-07-24 15:05:16 -0700424ATTRIBUTE_GROUPS(enclosure_class);
James Bottomleyd569d5b2008-02-03 15:40:56 -0600425
426static struct class enclosure_class = {
427 .name = "enclosure",
428 .owner = THIS_MODULE,
Tony Jonesee959b02008-02-22 00:13:36 +0100429 .dev_release = enclosure_release,
Greg Kroah-Hartman899826f2013-07-24 15:05:16 -0700430 .dev_groups = enclosure_class_groups,
James Bottomleyd569d5b2008-02-03 15:40:56 -0600431};
432
433static const char *const enclosure_status [] = {
434 [ENCLOSURE_STATUS_UNSUPPORTED] = "unsupported",
435 [ENCLOSURE_STATUS_OK] = "OK",
436 [ENCLOSURE_STATUS_CRITICAL] = "critical",
437 [ENCLOSURE_STATUS_NON_CRITICAL] = "non-critical",
438 [ENCLOSURE_STATUS_UNRECOVERABLE] = "unrecoverable",
439 [ENCLOSURE_STATUS_NOT_INSTALLED] = "not installed",
440 [ENCLOSURE_STATUS_UNKNOWN] = "unknown",
441 [ENCLOSURE_STATUS_UNAVAILABLE] = "unavailable",
James Bottomleycc9b2e92009-11-26 09:50:20 -0600442 [ENCLOSURE_STATUS_MAX] = NULL,
James Bottomleyd569d5b2008-02-03 15:40:56 -0600443};
444
445static const char *const enclosure_type [] = {
446 [ENCLOSURE_COMPONENT_DEVICE] = "device",
447 [ENCLOSURE_COMPONENT_ARRAY_DEVICE] = "array device",
448};
449
Tony Jonesee959b02008-02-22 00:13:36 +0100450static ssize_t get_component_fault(struct device *cdev,
451 struct device_attribute *attr, char *buf)
James Bottomleyd569d5b2008-02-03 15:40:56 -0600452{
453 struct enclosure_device *edev = to_enclosure_device(cdev->parent);
454 struct enclosure_component *ecomp = to_enclosure_component(cdev);
455
456 if (edev->cb->get_fault)
457 edev->cb->get_fault(edev, ecomp);
458 return snprintf(buf, 40, "%d\n", ecomp->fault);
459}
460
Tony Jonesee959b02008-02-22 00:13:36 +0100461static ssize_t set_component_fault(struct device *cdev,
462 struct device_attribute *attr,
463 const char *buf, size_t count)
James Bottomleyd569d5b2008-02-03 15:40:56 -0600464{
465 struct enclosure_device *edev = to_enclosure_device(cdev->parent);
466 struct enclosure_component *ecomp = to_enclosure_component(cdev);
467 int val = simple_strtoul(buf, NULL, 0);
468
469 if (edev->cb->set_fault)
470 edev->cb->set_fault(edev, ecomp, val);
471 return count;
472}
473
Tony Jonesee959b02008-02-22 00:13:36 +0100474static ssize_t get_component_status(struct device *cdev,
475 struct device_attribute *attr,char *buf)
James Bottomleyd569d5b2008-02-03 15:40:56 -0600476{
477 struct enclosure_device *edev = to_enclosure_device(cdev->parent);
478 struct enclosure_component *ecomp = to_enclosure_component(cdev);
479
480 if (edev->cb->get_status)
481 edev->cb->get_status(edev, ecomp);
482 return snprintf(buf, 40, "%s\n", enclosure_status[ecomp->status]);
483}
484
Tony Jonesee959b02008-02-22 00:13:36 +0100485static ssize_t set_component_status(struct device *cdev,
486 struct device_attribute *attr,
487 const char *buf, size_t count)
James Bottomleyd569d5b2008-02-03 15:40:56 -0600488{
489 struct enclosure_device *edev = to_enclosure_device(cdev->parent);
490 struct enclosure_component *ecomp = to_enclosure_component(cdev);
491 int i;
492
493 for (i = 0; enclosure_status[i]; i++) {
494 if (strncmp(buf, enclosure_status[i],
495 strlen(enclosure_status[i])) == 0 &&
496 (buf[strlen(enclosure_status[i])] == '\n' ||
497 buf[strlen(enclosure_status[i])] == '\0'))
498 break;
499 }
500
501 if (enclosure_status[i] && edev->cb->set_status) {
502 edev->cb->set_status(edev, ecomp, i);
503 return count;
504 } else
505 return -EINVAL;
506}
507
Tony Jonesee959b02008-02-22 00:13:36 +0100508static ssize_t get_component_active(struct device *cdev,
509 struct device_attribute *attr, char *buf)
James Bottomleyd569d5b2008-02-03 15:40:56 -0600510{
511 struct enclosure_device *edev = to_enclosure_device(cdev->parent);
512 struct enclosure_component *ecomp = to_enclosure_component(cdev);
513
514 if (edev->cb->get_active)
515 edev->cb->get_active(edev, ecomp);
516 return snprintf(buf, 40, "%d\n", ecomp->active);
517}
518
Tony Jonesee959b02008-02-22 00:13:36 +0100519static ssize_t set_component_active(struct device *cdev,
520 struct device_attribute *attr,
521 const char *buf, size_t count)
James Bottomleyd569d5b2008-02-03 15:40:56 -0600522{
523 struct enclosure_device *edev = to_enclosure_device(cdev->parent);
524 struct enclosure_component *ecomp = to_enclosure_component(cdev);
525 int val = simple_strtoul(buf, NULL, 0);
526
527 if (edev->cb->set_active)
528 edev->cb->set_active(edev, ecomp, val);
529 return count;
530}
531
Tony Jonesee959b02008-02-22 00:13:36 +0100532static ssize_t get_component_locate(struct device *cdev,
533 struct device_attribute *attr, char *buf)
James Bottomleyd569d5b2008-02-03 15:40:56 -0600534{
535 struct enclosure_device *edev = to_enclosure_device(cdev->parent);
536 struct enclosure_component *ecomp = to_enclosure_component(cdev);
537
538 if (edev->cb->get_locate)
539 edev->cb->get_locate(edev, ecomp);
540 return snprintf(buf, 40, "%d\n", ecomp->locate);
541}
542
Tony Jonesee959b02008-02-22 00:13:36 +0100543static ssize_t set_component_locate(struct device *cdev,
544 struct device_attribute *attr,
545 const char *buf, size_t count)
James Bottomleyd569d5b2008-02-03 15:40:56 -0600546{
547 struct enclosure_device *edev = to_enclosure_device(cdev->parent);
548 struct enclosure_component *ecomp = to_enclosure_component(cdev);
549 int val = simple_strtoul(buf, NULL, 0);
550
551 if (edev->cb->set_locate)
552 edev->cb->set_locate(edev, ecomp, val);
553 return count;
554}
555
Tony Jonesee959b02008-02-22 00:13:36 +0100556static ssize_t get_component_type(struct device *cdev,
557 struct device_attribute *attr, char *buf)
James Bottomleyd569d5b2008-02-03 15:40:56 -0600558{
559 struct enclosure_component *ecomp = to_enclosure_component(cdev);
560
561 return snprintf(buf, 40, "%s\n", enclosure_type[ecomp->type]);
562}
563
564
James Bottomleycb6b7f42008-03-15 13:01:40 -0500565static DEVICE_ATTR(fault, S_IRUGO | S_IWUSR, get_component_fault,
566 set_component_fault);
567static DEVICE_ATTR(status, S_IRUGO | S_IWUSR, get_component_status,
568 set_component_status);
569static DEVICE_ATTR(active, S_IRUGO | S_IWUSR, get_component_active,
570 set_component_active);
571static DEVICE_ATTR(locate, S_IRUGO | S_IWUSR, get_component_locate,
572 set_component_locate);
573static DEVICE_ATTR(type, S_IRUGO, get_component_type, NULL);
574
575static struct attribute *enclosure_component_attrs[] = {
576 &dev_attr_fault.attr,
577 &dev_attr_status.attr,
578 &dev_attr_active.attr,
579 &dev_attr_locate.attr,
580 &dev_attr_type.attr,
581 NULL
James Bottomleyd569d5b2008-02-03 15:40:56 -0600582};
Greg Kroah-Hartman899826f2013-07-24 15:05:16 -0700583ATTRIBUTE_GROUPS(enclosure_component);
James Bottomleyd569d5b2008-02-03 15:40:56 -0600584
585static int __init enclosure_init(void)
586{
587 int err;
588
589 err = class_register(&enclosure_class);
590 if (err)
591 return err;
James Bottomleyd569d5b2008-02-03 15:40:56 -0600592
593 return 0;
James Bottomleyd569d5b2008-02-03 15:40:56 -0600594}
595
596static void __exit enclosure_exit(void)
597{
James Bottomleyd569d5b2008-02-03 15:40:56 -0600598 class_unregister(&enclosure_class);
599}
600
601module_init(enclosure_init);
602module_exit(enclosure_exit);
603
604MODULE_AUTHOR("James Bottomley");
605MODULE_DESCRIPTION("Enclosure Services");
606MODULE_LICENSE("GPL v2");