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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * kobject.c - library routines for handling generic kernel objects | |
3 | * | |
4 | * Copyright (c) 2002-2003 Patrick Mochel <mochel@osdl.org> | |
f0e7e1bd GKH |
5 | * Copyright (c) 2006-2007 Greg Kroah-Hartman <greg@kroah.com> |
6 | * Copyright (c) 2006-2007 Novell Inc. | |
1da177e4 LT |
7 | * |
8 | * This file is released under the GPLv2. | |
9 | * | |
10 | * | |
11 | * Please see the file Documentation/kobject.txt for critical information | |
12 | * about using the kobject interface. | |
13 | */ | |
14 | ||
15 | #include <linux/kobject.h> | |
eee03164 | 16 | #include <linux/kobj_completion.h> |
1da177e4 | 17 | #include <linux/string.h> |
8bc3bcc9 | 18 | #include <linux/export.h> |
1da177e4 | 19 | #include <linux/stat.h> |
4e57b681 | 20 | #include <linux/slab.h> |
1da177e4 | 21 | |
e34ff490 TH |
22 | /** |
23 | * kobject_namespace - return @kobj's namespace tag | |
24 | * @kobj: kobject in question | |
25 | * | |
26 | * Returns namespace tag of @kobj if its parent has namespace ops enabled | |
27 | * and thus @kobj should have a namespace tag associated with it. Returns | |
28 | * %NULL otherwise. | |
29 | */ | |
30 | const void *kobject_namespace(struct kobject *kobj) | |
31 | { | |
32 | const struct kobj_ns_type_operations *ns_ops = kobj_ns_ops(kobj); | |
cb26a311 | 33 | const void *ns; |
e34ff490 TH |
34 | |
35 | if (!ns_ops || ns_ops->type == KOBJ_NS_TYPE_NONE) | |
36 | return NULL; | |
37 | ||
cb26a311 TH |
38 | ns = kobj->ktype->namespace(kobj); |
39 | WARN_ON(!ns); /* @kobj in a namespace is required to have !NULL tag */ | |
40 | return ns; | |
e34ff490 TH |
41 | } |
42 | ||
e374a2bf GKH |
43 | /* |
44 | * populate_dir - populate directory with attributes. | |
45 | * @kobj: object we're working on. | |
1da177e4 | 46 | * |
e374a2bf GKH |
47 | * Most subsystems have a set of default attributes that are associated |
48 | * with an object that registers with them. This is a helper called during | |
49 | * object registration that loops through the default attributes of the | |
50 | * subsystem and creates attributes files for them in sysfs. | |
1da177e4 | 51 | */ |
e374a2bf | 52 | static int populate_dir(struct kobject *kobj) |
1da177e4 | 53 | { |
e374a2bf GKH |
54 | struct kobj_type *t = get_ktype(kobj); |
55 | struct attribute *attr; | |
1da177e4 LT |
56 | int error = 0; |
57 | int i; | |
e374a2bf | 58 | |
1da177e4 LT |
59 | if (t && t->default_attrs) { |
60 | for (i = 0; (attr = t->default_attrs[i]) != NULL; i++) { | |
e374a2bf GKH |
61 | error = sysfs_create_file(kobj, attr); |
62 | if (error) | |
1da177e4 LT |
63 | break; |
64 | } | |
65 | } | |
66 | return error; | |
67 | } | |
68 | ||
e374a2bf | 69 | static int create_dir(struct kobject *kobj) |
1da177e4 | 70 | { |
e34ff490 TH |
71 | int error; |
72 | ||
73 | error = sysfs_create_dir_ns(kobj, kobject_namespace(kobj)); | |
6b960610 | 74 | if (!error) { |
75 | error = populate_dir(kobj); | |
76 | if (error) | |
77 | sysfs_remove_dir(kobj); | |
1da177e4 LT |
78 | } |
79 | return error; | |
80 | } | |
81 | ||
1da177e4 LT |
82 | static int get_kobj_path_length(struct kobject *kobj) |
83 | { | |
84 | int length = 1; | |
e374a2bf | 85 | struct kobject *parent = kobj; |
1da177e4 | 86 | |
e374a2bf | 87 | /* walk up the ancestors until we hit the one pointing to the |
1da177e4 LT |
88 | * root. |
89 | * Add 1 to strlen for leading '/' of each level. | |
90 | */ | |
91 | do { | |
b365b3da CE |
92 | if (kobject_name(parent) == NULL) |
93 | return 0; | |
1da177e4 LT |
94 | length += strlen(kobject_name(parent)) + 1; |
95 | parent = parent->parent; | |
96 | } while (parent); | |
97 | return length; | |
98 | } | |
99 | ||
100 | static void fill_kobj_path(struct kobject *kobj, char *path, int length) | |
101 | { | |
e374a2bf | 102 | struct kobject *parent; |
1da177e4 LT |
103 | |
104 | --length; | |
105 | for (parent = kobj; parent; parent = parent->parent) { | |
106 | int cur = strlen(kobject_name(parent)); | |
107 | /* back up enough to print this name with '/' */ | |
108 | length -= cur; | |
e374a2bf | 109 | strncpy(path + length, kobject_name(parent), cur); |
1da177e4 LT |
110 | *(path + --length) = '/'; |
111 | } | |
112 | ||
9f66fa2a | 113 | pr_debug("kobject: '%s' (%p): %s: path = '%s'\n", kobject_name(kobj), |
810304db | 114 | kobj, __func__, path); |
1da177e4 LT |
115 | } |
116 | ||
117 | /** | |
72fd4a35 | 118 | * kobject_get_path - generate and return the path associated with a given kobj and kset pair. |
1da177e4 LT |
119 | * |
120 | * @kobj: kobject in question, with which to build the path | |
121 | * @gfp_mask: the allocation type used to allocate the path | |
72fd4a35 RD |
122 | * |
123 | * The result must be freed by the caller with kfree(). | |
1da177e4 | 124 | */ |
fd4f2df2 | 125 | char *kobject_get_path(struct kobject *kobj, gfp_t gfp_mask) |
1da177e4 LT |
126 | { |
127 | char *path; | |
128 | int len; | |
129 | ||
130 | len = get_kobj_path_length(kobj); | |
b365b3da CE |
131 | if (len == 0) |
132 | return NULL; | |
4668edc3 | 133 | path = kzalloc(len, gfp_mask); |
1da177e4 LT |
134 | if (!path) |
135 | return NULL; | |
1da177e4 LT |
136 | fill_kobj_path(kobj, path, len); |
137 | ||
138 | return path; | |
139 | } | |
80fc9f53 | 140 | EXPORT_SYMBOL_GPL(kobject_get_path); |
1da177e4 | 141 | |
0f4dafc0 KS |
142 | /* add the kobject to its kset's list */ |
143 | static void kobj_kset_join(struct kobject *kobj) | |
1da177e4 | 144 | { |
0f4dafc0 | 145 | if (!kobj->kset) |
31b9025a | 146 | return; |
0f4dafc0 KS |
147 | |
148 | kset_get(kobj->kset); | |
149 | spin_lock(&kobj->kset->list_lock); | |
150 | list_add_tail(&kobj->entry, &kobj->kset->list); | |
151 | spin_unlock(&kobj->kset->list_lock); | |
1da177e4 LT |
152 | } |
153 | ||
0f4dafc0 KS |
154 | /* remove the kobject from its kset's list */ |
155 | static void kobj_kset_leave(struct kobject *kobj) | |
156 | { | |
157 | if (!kobj->kset) | |
158 | return; | |
1da177e4 | 159 | |
0f4dafc0 KS |
160 | spin_lock(&kobj->kset->list_lock); |
161 | list_del_init(&kobj->entry); | |
162 | spin_unlock(&kobj->kset->list_lock); | |
163 | kset_put(kobj->kset); | |
164 | } | |
1da177e4 | 165 | |
e374a2bf | 166 | static void kobject_init_internal(struct kobject *kobj) |
1da177e4 | 167 | { |
0f4dafc0 KS |
168 | if (!kobj) |
169 | return; | |
170 | kref_init(&kobj->kref); | |
171 | INIT_LIST_HEAD(&kobj->entry); | |
a4573c48 GKH |
172 | kobj->state_in_sysfs = 0; |
173 | kobj->state_add_uevent_sent = 0; | |
174 | kobj->state_remove_uevent_sent = 0; | |
175 | kobj->state_initialized = 1; | |
1da177e4 LT |
176 | } |
177 | ||
0f4dafc0 | 178 | |
9e7bbccd | 179 | static int kobject_add_internal(struct kobject *kobj) |
1da177e4 LT |
180 | { |
181 | int error = 0; | |
e374a2bf | 182 | struct kobject *parent; |
1da177e4 | 183 | |
0f4dafc0 | 184 | if (!kobj) |
1da177e4 | 185 | return -ENOENT; |
0f4dafc0 | 186 | |
af5ca3f4 | 187 | if (!kobj->name || !kobj->name[0]) { |
d955c78a | 188 | WARN(1, "kobject: (%p): attempted to be registered with empty " |
9f66fa2a | 189 | "name!\n", kobj); |
c171fef5 GKH |
190 | return -EINVAL; |
191 | } | |
1da177e4 | 192 | |
0f4dafc0 | 193 | parent = kobject_get(kobj->parent); |
1da177e4 | 194 | |
0f4dafc0 | 195 | /* join kset if set, use it as parent if we do not already have one */ |
1da177e4 | 196 | if (kobj->kset) { |
0f4dafc0 | 197 | if (!parent) |
1da177e4 | 198 | parent = kobject_get(&kobj->kset->kobj); |
0f4dafc0 | 199 | kobj_kset_join(kobj); |
460f7e9a | 200 | kobj->parent = parent; |
1da177e4 | 201 | } |
1da177e4 | 202 | |
0f4dafc0 | 203 | pr_debug("kobject: '%s' (%p): %s: parent: '%s', set: '%s'\n", |
810304db | 204 | kobject_name(kobj), kobj, __func__, |
0f4dafc0 | 205 | parent ? kobject_name(parent) : "<NULL>", |
e374a2bf | 206 | kobj->kset ? kobject_name(&kobj->kset->kobj) : "<NULL>"); |
0f4dafc0 | 207 | |
90bc6135 | 208 | error = create_dir(kobj); |
1da177e4 | 209 | if (error) { |
0f4dafc0 KS |
210 | kobj_kset_leave(kobj); |
211 | kobject_put(parent); | |
212 | kobj->parent = NULL; | |
dcd0da00 GKH |
213 | |
214 | /* be noisy on error issues */ | |
215 | if (error == -EEXIST) | |
282029c0 DW |
216 | WARN(1, "%s failed for %s with " |
217 | "-EEXIST, don't try to register things with " | |
218 | "the same name in the same directory.\n", | |
219 | __func__, kobject_name(kobj)); | |
dcd0da00 | 220 | else |
282029c0 DW |
221 | WARN(1, "%s failed for %s (error: %d parent: %s)\n", |
222 | __func__, kobject_name(kobj), error, | |
223 | parent ? kobject_name(parent) : "'none'"); | |
0f4dafc0 KS |
224 | } else |
225 | kobj->state_in_sysfs = 1; | |
1da177e4 LT |
226 | |
227 | return error; | |
228 | } | |
229 | ||
663a4743 GKH |
230 | /** |
231 | * kobject_set_name_vargs - Set the name of an kobject | |
232 | * @kobj: struct kobject to set the name of | |
233 | * @fmt: format string used to build the name | |
234 | * @vargs: vargs to format the string. | |
235 | */ | |
1fa5ae85 | 236 | int kobject_set_name_vargs(struct kobject *kobj, const char *fmt, |
663a4743 GKH |
237 | va_list vargs) |
238 | { | |
9f255651 KS |
239 | const char *old_name = kobj->name; |
240 | char *s; | |
663a4743 | 241 | |
8a577ffc KS |
242 | if (kobj->name && !fmt) |
243 | return 0; | |
244 | ||
a4ca6617 KS |
245 | kobj->name = kvasprintf(GFP_KERNEL, fmt, vargs); |
246 | if (!kobj->name) | |
247 | return -ENOMEM; | |
663a4743 | 248 | |
9f255651 | 249 | /* ewww... some of these buggers have '/' in the name ... */ |
25fdeb3f | 250 | while ((s = strchr(kobj->name, '/'))) |
9f255651 KS |
251 | s[0] = '!'; |
252 | ||
253 | kfree(old_name); | |
663a4743 GKH |
254 | return 0; |
255 | } | |
1da177e4 LT |
256 | |
257 | /** | |
8c4606b1 | 258 | * kobject_set_name - Set the name of a kobject |
663a4743 | 259 | * @kobj: struct kobject to set the name of |
8c4606b1 | 260 | * @fmt: format string used to build the name |
1da177e4 | 261 | * |
8c4606b1 GKH |
262 | * This sets the name of the kobject. If you have already added the |
263 | * kobject to the system, you must call kobject_rename() in order to | |
264 | * change the name of the kobject. | |
1da177e4 | 265 | */ |
663a4743 | 266 | int kobject_set_name(struct kobject *kobj, const char *fmt, ...) |
1da177e4 | 267 | { |
a4ca6617 | 268 | va_list vargs; |
663a4743 | 269 | int retval; |
1da177e4 | 270 | |
a4ca6617 KS |
271 | va_start(vargs, fmt); |
272 | retval = kobject_set_name_vargs(kobj, fmt, vargs); | |
273 | va_end(vargs); | |
1da177e4 | 274 | |
663a4743 | 275 | return retval; |
1da177e4 | 276 | } |
1da177e4 LT |
277 | EXPORT_SYMBOL(kobject_set_name); |
278 | ||
e86000d0 | 279 | /** |
f9cb074b | 280 | * kobject_init - initialize a kobject structure |
e86000d0 GKH |
281 | * @kobj: pointer to the kobject to initialize |
282 | * @ktype: pointer to the ktype for this kobject. | |
283 | * | |
284 | * This function will properly initialize a kobject such that it can then | |
285 | * be passed to the kobject_add() call. | |
286 | * | |
287 | * After this function is called, the kobject MUST be cleaned up by a call | |
288 | * to kobject_put(), not by a call to kfree directly to ensure that all of | |
289 | * the memory is cleaned up properly. | |
290 | */ | |
f9cb074b | 291 | void kobject_init(struct kobject *kobj, struct kobj_type *ktype) |
e86000d0 GKH |
292 | { |
293 | char *err_str; | |
294 | ||
295 | if (!kobj) { | |
296 | err_str = "invalid kobject pointer!"; | |
297 | goto error; | |
298 | } | |
299 | if (!ktype) { | |
300 | err_str = "must have a ktype to be initialized properly!\n"; | |
301 | goto error; | |
302 | } | |
0f4dafc0 | 303 | if (kobj->state_initialized) { |
e86000d0 | 304 | /* do not error out as sometimes we can recover */ |
0f4dafc0 KS |
305 | printk(KERN_ERR "kobject (%p): tried to init an initialized " |
306 | "object, something is seriously wrong.\n", kobj); | |
e86000d0 GKH |
307 | dump_stack(); |
308 | } | |
309 | ||
a4573c48 | 310 | kobject_init_internal(kobj); |
e86000d0 GKH |
311 | kobj->ktype = ktype; |
312 | return; | |
313 | ||
314 | error: | |
0f4dafc0 | 315 | printk(KERN_ERR "kobject (%p): %s\n", kobj, err_str); |
e86000d0 GKH |
316 | dump_stack(); |
317 | } | |
f9cb074b | 318 | EXPORT_SYMBOL(kobject_init); |
e86000d0 | 319 | |
244f6cee GKH |
320 | static int kobject_add_varg(struct kobject *kobj, struct kobject *parent, |
321 | const char *fmt, va_list vargs) | |
322 | { | |
244f6cee GKH |
323 | int retval; |
324 | ||
a4ca6617 | 325 | retval = kobject_set_name_vargs(kobj, fmt, vargs); |
244f6cee GKH |
326 | if (retval) { |
327 | printk(KERN_ERR "kobject: can not set name properly!\n"); | |
328 | return retval; | |
329 | } | |
330 | kobj->parent = parent; | |
9e7bbccd | 331 | return kobject_add_internal(kobj); |
244f6cee GKH |
332 | } |
333 | ||
334 | /** | |
b2d6db58 | 335 | * kobject_add - the main kobject add function |
244f6cee GKH |
336 | * @kobj: the kobject to add |
337 | * @parent: pointer to the parent of the kobject. | |
338 | * @fmt: format to name the kobject with. | |
339 | * | |
340 | * The kobject name is set and added to the kobject hierarchy in this | |
341 | * function. | |
342 | * | |
343 | * If @parent is set, then the parent of the @kobj will be set to it. | |
344 | * If @parent is NULL, then the parent of the @kobj will be set to the | |
345 | * kobject associted with the kset assigned to this kobject. If no kset | |
346 | * is assigned to the kobject, then the kobject will be located in the | |
347 | * root of the sysfs tree. | |
348 | * | |
349 | * If this function returns an error, kobject_put() must be called to | |
350 | * properly clean up the memory associated with the object. | |
244f6cee GKH |
351 | * Under no instance should the kobject that is passed to this function |
352 | * be directly freed with a call to kfree(), that can leak memory. | |
353 | * | |
0f4dafc0 | 354 | * Note, no "add" uevent will be created with this call, the caller should set |
244f6cee GKH |
355 | * up all of the necessary sysfs files for the object and then call |
356 | * kobject_uevent() with the UEVENT_ADD parameter to ensure that | |
357 | * userspace is properly notified of this kobject's creation. | |
358 | */ | |
b2d6db58 GKH |
359 | int kobject_add(struct kobject *kobj, struct kobject *parent, |
360 | const char *fmt, ...) | |
244f6cee GKH |
361 | { |
362 | va_list args; | |
363 | int retval; | |
364 | ||
365 | if (!kobj) | |
366 | return -EINVAL; | |
367 | ||
0f4dafc0 KS |
368 | if (!kobj->state_initialized) { |
369 | printk(KERN_ERR "kobject '%s' (%p): tried to add an " | |
370 | "uninitialized object, something is seriously wrong.\n", | |
371 | kobject_name(kobj), kobj); | |
372 | dump_stack(); | |
373 | return -EINVAL; | |
374 | } | |
244f6cee GKH |
375 | va_start(args, fmt); |
376 | retval = kobject_add_varg(kobj, parent, fmt, args); | |
377 | va_end(args); | |
378 | ||
379 | return retval; | |
380 | } | |
b2d6db58 | 381 | EXPORT_SYMBOL(kobject_add); |
244f6cee | 382 | |
c11c4154 GKH |
383 | /** |
384 | * kobject_init_and_add - initialize a kobject structure and add it to the kobject hierarchy | |
385 | * @kobj: pointer to the kobject to initialize | |
386 | * @ktype: pointer to the ktype for this kobject. | |
387 | * @parent: pointer to the parent of this kobject. | |
388 | * @fmt: the name of the kobject. | |
389 | * | |
f9cb074b | 390 | * This function combines the call to kobject_init() and |
b2d6db58 GKH |
391 | * kobject_add(). The same type of error handling after a call to |
392 | * kobject_add() and kobject lifetime rules are the same here. | |
c11c4154 GKH |
393 | */ |
394 | int kobject_init_and_add(struct kobject *kobj, struct kobj_type *ktype, | |
395 | struct kobject *parent, const char *fmt, ...) | |
396 | { | |
397 | va_list args; | |
398 | int retval; | |
399 | ||
f9cb074b | 400 | kobject_init(kobj, ktype); |
c11c4154 GKH |
401 | |
402 | va_start(args, fmt); | |
403 | retval = kobject_add_varg(kobj, parent, fmt, args); | |
404 | va_end(args); | |
405 | ||
406 | return retval; | |
407 | } | |
408 | EXPORT_SYMBOL_GPL(kobject_init_and_add); | |
409 | ||
1da177e4 | 410 | /** |
e374a2bf GKH |
411 | * kobject_rename - change the name of an object |
412 | * @kobj: object in question. | |
413 | * @new_name: object's new name | |
030c1d2b EB |
414 | * |
415 | * It is the responsibility of the caller to provide mutual | |
416 | * exclusion between two different calls of kobject_rename | |
417 | * on the same kobject and to ensure that new_name is valid and | |
418 | * won't conflict with other kobjects. | |
1da177e4 | 419 | */ |
e374a2bf | 420 | int kobject_rename(struct kobject *kobj, const char *new_name) |
1da177e4 LT |
421 | { |
422 | int error = 0; | |
ca2f37db | 423 | const char *devpath = NULL; |
0b4a4fea | 424 | const char *dup_name = NULL, *name; |
ca2f37db JT |
425 | char *devpath_string = NULL; |
426 | char *envp[2]; | |
1da177e4 LT |
427 | |
428 | kobj = kobject_get(kobj); | |
429 | if (!kobj) | |
430 | return -EINVAL; | |
b592fcfe EB |
431 | if (!kobj->parent) |
432 | return -EINVAL; | |
ca2f37db JT |
433 | |
434 | devpath = kobject_get_path(kobj, GFP_KERNEL); | |
435 | if (!devpath) { | |
436 | error = -ENOMEM; | |
437 | goto out; | |
438 | } | |
439 | devpath_string = kmalloc(strlen(devpath) + 15, GFP_KERNEL); | |
440 | if (!devpath_string) { | |
441 | error = -ENOMEM; | |
442 | goto out; | |
443 | } | |
444 | sprintf(devpath_string, "DEVPATH_OLD=%s", devpath); | |
445 | envp[0] = devpath_string; | |
446 | envp[1] = NULL; | |
ca2f37db | 447 | |
0b4a4fea EB |
448 | name = dup_name = kstrdup(new_name, GFP_KERNEL); |
449 | if (!name) { | |
450 | error = -ENOMEM; | |
451 | goto out; | |
452 | } | |
453 | ||
e34ff490 | 454 | error = sysfs_rename_dir_ns(kobj, new_name, kobject_namespace(kobj)); |
0b4a4fea EB |
455 | if (error) |
456 | goto out; | |
457 | ||
458 | /* Install the new kobject name */ | |
459 | dup_name = kobj->name; | |
460 | kobj->name = name; | |
ca2f37db JT |
461 | |
462 | /* This function is mostly/only used for network interface. | |
463 | * Some hotplug package track interfaces by their name and | |
464 | * therefore want to know when the name is changed by the user. */ | |
0b4a4fea | 465 | kobject_uevent_env(kobj, KOBJ_MOVE, envp); |
ca2f37db JT |
466 | |
467 | out: | |
0b4a4fea | 468 | kfree(dup_name); |
ca2f37db JT |
469 | kfree(devpath_string); |
470 | kfree(devpath); | |
b592fcfe EB |
471 | kobject_put(kobj); |
472 | ||
473 | return error; | |
474 | } | |
8344b568 | 475 | EXPORT_SYMBOL_GPL(kobject_rename); |
b592fcfe | 476 | |
8a82472f | 477 | /** |
e374a2bf GKH |
478 | * kobject_move - move object to another parent |
479 | * @kobj: object in question. | |
480 | * @new_parent: object's new parent (can be NULL) | |
8a82472f | 481 | */ |
8a82472f CH |
482 | int kobject_move(struct kobject *kobj, struct kobject *new_parent) |
483 | { | |
484 | int error; | |
485 | struct kobject *old_parent; | |
486 | const char *devpath = NULL; | |
487 | char *devpath_string = NULL; | |
488 | char *envp[2]; | |
489 | ||
490 | kobj = kobject_get(kobj); | |
491 | if (!kobj) | |
492 | return -EINVAL; | |
493 | new_parent = kobject_get(new_parent); | |
494 | if (!new_parent) { | |
c744aeae CH |
495 | if (kobj->kset) |
496 | new_parent = kobject_get(&kobj->kset->kobj); | |
8a82472f | 497 | } |
e34ff490 | 498 | |
8a82472f CH |
499 | /* old object path */ |
500 | devpath = kobject_get_path(kobj, GFP_KERNEL); | |
501 | if (!devpath) { | |
502 | error = -ENOMEM; | |
503 | goto out; | |
504 | } | |
505 | devpath_string = kmalloc(strlen(devpath) + 15, GFP_KERNEL); | |
506 | if (!devpath_string) { | |
507 | error = -ENOMEM; | |
508 | goto out; | |
509 | } | |
510 | sprintf(devpath_string, "DEVPATH_OLD=%s", devpath); | |
511 | envp[0] = devpath_string; | |
512 | envp[1] = NULL; | |
e34ff490 | 513 | error = sysfs_move_dir_ns(kobj, new_parent, kobject_namespace(kobj)); |
8a82472f CH |
514 | if (error) |
515 | goto out; | |
516 | old_parent = kobj->parent; | |
517 | kobj->parent = new_parent; | |
9e993efb | 518 | new_parent = NULL; |
8a82472f CH |
519 | kobject_put(old_parent); |
520 | kobject_uevent_env(kobj, KOBJ_MOVE, envp); | |
521 | out: | |
9e993efb | 522 | kobject_put(new_parent); |
8a82472f CH |
523 | kobject_put(kobj); |
524 | kfree(devpath_string); | |
525 | kfree(devpath); | |
526 | return error; | |
527 | } | |
528 | ||
1da177e4 | 529 | /** |
e374a2bf GKH |
530 | * kobject_del - unlink kobject from hierarchy. |
531 | * @kobj: object. | |
1da177e4 | 532 | */ |
e374a2bf | 533 | void kobject_del(struct kobject *kobj) |
1da177e4 | 534 | { |
31b9025a GKH |
535 | if (!kobj) |
536 | return; | |
0f4dafc0 | 537 | |
1da177e4 | 538 | sysfs_remove_dir(kobj); |
0f4dafc0 KS |
539 | kobj->state_in_sysfs = 0; |
540 | kobj_kset_leave(kobj); | |
541 | kobject_put(kobj->parent); | |
542 | kobj->parent = NULL; | |
1da177e4 LT |
543 | } |
544 | ||
1da177e4 | 545 | /** |
e374a2bf GKH |
546 | * kobject_get - increment refcount for object. |
547 | * @kobj: object. | |
1da177e4 | 548 | */ |
e374a2bf | 549 | struct kobject *kobject_get(struct kobject *kobj) |
1da177e4 LT |
550 | { |
551 | if (kobj) | |
552 | kref_get(&kobj->kref); | |
553 | return kobj; | |
554 | } | |
555 | ||
2d864e41 | 556 | static struct kobject * __must_check kobject_get_unless_zero(struct kobject *kobj) |
a49b7e82 LT |
557 | { |
558 | if (!kref_get_unless_zero(&kobj->kref)) | |
559 | kobj = NULL; | |
560 | return kobj; | |
561 | } | |
562 | ||
18041f47 GKH |
563 | /* |
564 | * kobject_cleanup - free kobject resources. | |
565 | * @kobj: object to cleanup | |
1da177e4 | 566 | */ |
18041f47 | 567 | static void kobject_cleanup(struct kobject *kobj) |
1da177e4 | 568 | { |
0f4dafc0 | 569 | struct kobj_type *t = get_ktype(kobj); |
af5ca3f4 | 570 | const char *name = kobj->name; |
1da177e4 | 571 | |
c817a67e RK |
572 | pr_debug("kobject: '%s' (%p): %s, parent %p\n", |
573 | kobject_name(kobj), kobj, __func__, kobj->parent); | |
0f4dafc0 KS |
574 | |
575 | if (t && !t->release) | |
576 | pr_debug("kobject: '%s' (%p): does not have a release() " | |
577 | "function, it is broken and must be fixed.\n", | |
578 | kobject_name(kobj), kobj); | |
579 | ||
580 | /* send "remove" if the caller did not do it but sent "add" */ | |
581 | if (kobj->state_add_uevent_sent && !kobj->state_remove_uevent_sent) { | |
582 | pr_debug("kobject: '%s' (%p): auto cleanup 'remove' event\n", | |
583 | kobject_name(kobj), kobj); | |
584 | kobject_uevent(kobj, KOBJ_REMOVE); | |
585 | } | |
586 | ||
587 | /* remove from sysfs if the caller did not do it */ | |
588 | if (kobj->state_in_sysfs) { | |
589 | pr_debug("kobject: '%s' (%p): auto cleanup kobject_del\n", | |
590 | kobject_name(kobj), kobj); | |
591 | kobject_del(kobj); | |
592 | } | |
593 | ||
ce2c9cb0 | 594 | if (t && t->release) { |
0f4dafc0 KS |
595 | pr_debug("kobject: '%s' (%p): calling ktype release\n", |
596 | kobject_name(kobj), kobj); | |
1da177e4 | 597 | t->release(kobj); |
0f4dafc0 KS |
598 | } |
599 | ||
600 | /* free name if we allocated it */ | |
af5ca3f4 | 601 | if (name) { |
0f4dafc0 | 602 | pr_debug("kobject: '%s': free name\n", name); |
ce2c9cb0 GKH |
603 | kfree(name); |
604 | } | |
1da177e4 LT |
605 | } |
606 | ||
c817a67e RK |
607 | #ifdef CONFIG_DEBUG_KOBJECT_RELEASE |
608 | static void kobject_delayed_cleanup(struct work_struct *work) | |
609 | { | |
610 | kobject_cleanup(container_of(to_delayed_work(work), | |
611 | struct kobject, release)); | |
612 | } | |
613 | #endif | |
614 | ||
1da177e4 LT |
615 | static void kobject_release(struct kref *kref) |
616 | { | |
c817a67e RK |
617 | struct kobject *kobj = container_of(kref, struct kobject, kref); |
618 | #ifdef CONFIG_DEBUG_KOBJECT_RELEASE | |
619 | pr_debug("kobject: '%s' (%p): %s, parent %p (delayed)\n", | |
620 | kobject_name(kobj), kobj, __func__, kobj->parent); | |
621 | INIT_DELAYED_WORK(&kobj->release, kobject_delayed_cleanup); | |
622 | schedule_delayed_work(&kobj->release, HZ); | |
623 | #else | |
624 | kobject_cleanup(kobj); | |
625 | #endif | |
1da177e4 LT |
626 | } |
627 | ||
628 | /** | |
e374a2bf GKH |
629 | * kobject_put - decrement refcount for object. |
630 | * @kobj: object. | |
1da177e4 | 631 | * |
e374a2bf | 632 | * Decrement the refcount, and if 0, call kobject_cleanup(). |
1da177e4 | 633 | */ |
e374a2bf | 634 | void kobject_put(struct kobject *kobj) |
1da177e4 | 635 | { |
c1ebdae5 | 636 | if (kobj) { |
d955c78a AV |
637 | if (!kobj->state_initialized) |
638 | WARN(1, KERN_WARNING "kobject: '%s' (%p): is not " | |
c1ebdae5 GKH |
639 | "initialized, yet kobject_put() is being " |
640 | "called.\n", kobject_name(kobj), kobj); | |
1da177e4 | 641 | kref_put(&kobj->kref, kobject_release); |
c1ebdae5 | 642 | } |
1da177e4 LT |
643 | } |
644 | ||
3f9e3ee9 | 645 | static void dynamic_kobj_release(struct kobject *kobj) |
7423172a | 646 | { |
810304db | 647 | pr_debug("kobject: (%p): %s\n", kobj, __func__); |
7423172a JN |
648 | kfree(kobj); |
649 | } | |
650 | ||
3f9e3ee9 | 651 | static struct kobj_type dynamic_kobj_ktype = { |
386f275f KS |
652 | .release = dynamic_kobj_release, |
653 | .sysfs_ops = &kobj_sysfs_ops, | |
7423172a JN |
654 | }; |
655 | ||
43968d2f | 656 | /** |
3f9e3ee9 GKH |
657 | * kobject_create - create a struct kobject dynamically |
658 | * | |
659 | * This function creates a kobject structure dynamically and sets it up | |
660 | * to be a "dynamic" kobject with a default release function set up. | |
661 | * | |
662 | * If the kobject was not able to be created, NULL will be returned. | |
43968d2f | 663 | * The kobject structure returned from here must be cleaned up with a |
f9cb074b | 664 | * call to kobject_put() and not kfree(), as kobject_init() has |
43968d2f | 665 | * already been called on this structure. |
3f9e3ee9 | 666 | */ |
43968d2f | 667 | struct kobject *kobject_create(void) |
3f9e3ee9 GKH |
668 | { |
669 | struct kobject *kobj; | |
670 | ||
671 | kobj = kzalloc(sizeof(*kobj), GFP_KERNEL); | |
672 | if (!kobj) | |
673 | return NULL; | |
674 | ||
f9cb074b | 675 | kobject_init(kobj, &dynamic_kobj_ktype); |
3f9e3ee9 GKH |
676 | return kobj; |
677 | } | |
678 | ||
679 | /** | |
680 | * kobject_create_and_add - create a struct kobject dynamically and register it with sysfs | |
681 | * | |
9ff1f838 | 682 | * @name: the name for the kobject |
3f9e3ee9 GKH |
683 | * @parent: the parent kobject of this kobject, if any. |
684 | * | |
f70701a3 | 685 | * This function creates a kobject structure dynamically and registers it |
3f9e3ee9 | 686 | * with sysfs. When you are finished with this structure, call |
78a2d906 | 687 | * kobject_put() and the structure will be dynamically freed when |
3f9e3ee9 GKH |
688 | * it is no longer being used. |
689 | * | |
690 | * If the kobject was not able to be created, NULL will be returned. | |
691 | */ | |
692 | struct kobject *kobject_create_and_add(const char *name, struct kobject *parent) | |
693 | { | |
694 | struct kobject *kobj; | |
695 | int retval; | |
696 | ||
697 | kobj = kobject_create(); | |
698 | if (!kobj) | |
699 | return NULL; | |
700 | ||
b2d6db58 | 701 | retval = kobject_add(kobj, parent, "%s", name); |
3f9e3ee9 GKH |
702 | if (retval) { |
703 | printk(KERN_WARNING "%s: kobject_add error: %d\n", | |
810304db | 704 | __func__, retval); |
3f9e3ee9 GKH |
705 | kobject_put(kobj); |
706 | kobj = NULL; | |
707 | } | |
708 | return kobj; | |
709 | } | |
710 | EXPORT_SYMBOL_GPL(kobject_create_and_add); | |
711 | ||
1da177e4 | 712 | /** |
e374a2bf GKH |
713 | * kset_init - initialize a kset for use |
714 | * @k: kset | |
1da177e4 | 715 | */ |
e374a2bf | 716 | void kset_init(struct kset *k) |
1da177e4 | 717 | { |
e1543ddf | 718 | kobject_init_internal(&k->kobj); |
1da177e4 LT |
719 | INIT_LIST_HEAD(&k->list); |
720 | spin_lock_init(&k->list_lock); | |
721 | } | |
722 | ||
23b5212c KS |
723 | /* default kobject attribute operations */ |
724 | static ssize_t kobj_attr_show(struct kobject *kobj, struct attribute *attr, | |
725 | char *buf) | |
726 | { | |
727 | struct kobj_attribute *kattr; | |
728 | ssize_t ret = -EIO; | |
729 | ||
730 | kattr = container_of(attr, struct kobj_attribute, attr); | |
731 | if (kattr->show) | |
732 | ret = kattr->show(kobj, kattr, buf); | |
733 | return ret; | |
734 | } | |
735 | ||
736 | static ssize_t kobj_attr_store(struct kobject *kobj, struct attribute *attr, | |
737 | const char *buf, size_t count) | |
738 | { | |
739 | struct kobj_attribute *kattr; | |
740 | ssize_t ret = -EIO; | |
741 | ||
742 | kattr = container_of(attr, struct kobj_attribute, attr); | |
743 | if (kattr->store) | |
744 | ret = kattr->store(kobj, kattr, buf, count); | |
745 | return ret; | |
746 | } | |
747 | ||
52cf25d0 | 748 | const struct sysfs_ops kobj_sysfs_ops = { |
23b5212c KS |
749 | .show = kobj_attr_show, |
750 | .store = kobj_attr_store, | |
751 | }; | |
1da177e4 | 752 | |
eee03164 JM |
753 | /** |
754 | * kobj_completion_init - initialize a kobj_completion object. | |
755 | * @kc: kobj_completion | |
756 | * @ktype: type of kobject to initialize | |
757 | * | |
758 | * kobj_completion structures can be embedded within structures with different | |
759 | * lifetime rules. During the release of the enclosing object, we can | |
760 | * wait on the release of the kobject so that we don't free it while it's | |
761 | * still busy. | |
762 | */ | |
763 | void kobj_completion_init(struct kobj_completion *kc, struct kobj_type *ktype) | |
764 | { | |
765 | init_completion(&kc->kc_unregister); | |
766 | kobject_init(&kc->kc_kobj, ktype); | |
767 | } | |
768 | EXPORT_SYMBOL_GPL(kobj_completion_init); | |
769 | ||
770 | /** | |
771 | * kobj_completion_release - release a kobj_completion object | |
772 | * @kobj: kobject embedded in kobj_completion | |
773 | * | |
774 | * Used with kobject_release to notify waiters that the kobject has been | |
775 | * released. | |
776 | */ | |
777 | void kobj_completion_release(struct kobject *kobj) | |
778 | { | |
779 | struct kobj_completion *kc = kobj_to_kobj_completion(kobj); | |
780 | complete(&kc->kc_unregister); | |
781 | } | |
782 | EXPORT_SYMBOL_GPL(kobj_completion_release); | |
783 | ||
784 | /** | |
785 | * kobj_completion_del_and_wait - release the kobject and wait for it | |
786 | * @kc: kobj_completion object to release | |
787 | * | |
788 | * Delete the kobject from sysfs and drop the reference count. Then wait | |
789 | * until any other outstanding references are also dropped. This routine | |
790 | * is only necessary once other references may have been taken on the | |
791 | * kobject. Typically this happens when the kobject has been published | |
792 | * to sysfs via kobject_add. | |
793 | */ | |
794 | void kobj_completion_del_and_wait(struct kobj_completion *kc) | |
795 | { | |
796 | kobject_del(&kc->kc_kobj); | |
797 | kobject_put(&kc->kc_kobj); | |
798 | wait_for_completion(&kc->kc_unregister); | |
799 | } | |
800 | EXPORT_SYMBOL_GPL(kobj_completion_del_and_wait); | |
801 | ||
1da177e4 | 802 | /** |
e374a2bf GKH |
803 | * kset_register - initialize and add a kset. |
804 | * @k: kset. | |
1da177e4 | 805 | */ |
e374a2bf | 806 | int kset_register(struct kset *k) |
1da177e4 | 807 | { |
80f03e34 KS |
808 | int err; |
809 | ||
31b9025a GKH |
810 | if (!k) |
811 | return -EINVAL; | |
80f03e34 | 812 | |
1da177e4 | 813 | kset_init(k); |
12e339ac | 814 | err = kobject_add_internal(&k->kobj); |
80f03e34 KS |
815 | if (err) |
816 | return err; | |
817 | kobject_uevent(&k->kobj, KOBJ_ADD); | |
818 | return 0; | |
1da177e4 LT |
819 | } |
820 | ||
1da177e4 | 821 | /** |
e374a2bf GKH |
822 | * kset_unregister - remove a kset. |
823 | * @k: kset. | |
1da177e4 | 824 | */ |
e374a2bf | 825 | void kset_unregister(struct kset *k) |
1da177e4 | 826 | { |
31b9025a GKH |
827 | if (!k) |
828 | return; | |
78a2d906 | 829 | kobject_put(&k->kobj); |
1da177e4 LT |
830 | } |
831 | ||
1da177e4 | 832 | /** |
e374a2bf GKH |
833 | * kset_find_obj - search for object in kset. |
834 | * @kset: kset we're looking in. | |
835 | * @name: object's name. | |
1da177e4 | 836 | * |
e374a2bf GKH |
837 | * Lock kset via @kset->subsys, and iterate over @kset->list, |
838 | * looking for a matching kobject. If matching object is found | |
839 | * take a reference and return the object. | |
1da177e4 | 840 | */ |
e374a2bf | 841 | struct kobject *kset_find_obj(struct kset *kset, const char *name) |
1da177e4 | 842 | { |
c6a2a3dc | 843 | struct kobject *k; |
e374a2bf | 844 | struct kobject *ret = NULL; |
1da177e4 LT |
845 | |
846 | spin_lock(&kset->list_lock); | |
c25d1dfb | 847 | |
c6a2a3dc | 848 | list_for_each_entry(k, &kset->list, entry) { |
e374a2bf | 849 | if (kobject_name(k) && !strcmp(kobject_name(k), name)) { |
a49b7e82 | 850 | ret = kobject_get_unless_zero(k); |
1da177e4 LT |
851 | break; |
852 | } | |
853 | } | |
c25d1dfb | 854 | |
1da177e4 LT |
855 | spin_unlock(&kset->list_lock); |
856 | return ret; | |
857 | } | |
858 | ||
b727c702 GKH |
859 | static void kset_release(struct kobject *kobj) |
860 | { | |
861 | struct kset *kset = container_of(kobj, struct kset, kobj); | |
9f66fa2a | 862 | pr_debug("kobject: '%s' (%p): %s\n", |
810304db | 863 | kobject_name(kobj), kobj, __func__); |
b727c702 GKH |
864 | kfree(kset); |
865 | } | |
866 | ||
386f275f KS |
867 | static struct kobj_type kset_ktype = { |
868 | .sysfs_ops = &kobj_sysfs_ops, | |
b727c702 GKH |
869 | .release = kset_release, |
870 | }; | |
871 | ||
872 | /** | |
873 | * kset_create - create a struct kset dynamically | |
874 | * | |
875 | * @name: the name for the kset | |
876 | * @uevent_ops: a struct kset_uevent_ops for the kset | |
877 | * @parent_kobj: the parent kobject of this kset, if any. | |
878 | * | |
879 | * This function creates a kset structure dynamically. This structure can | |
880 | * then be registered with the system and show up in sysfs with a call to | |
881 | * kset_register(). When you are finished with this structure, if | |
882 | * kset_register() has been called, call kset_unregister() and the | |
883 | * structure will be dynamically freed when it is no longer being used. | |
884 | * | |
885 | * If the kset was not able to be created, NULL will be returned. | |
886 | */ | |
887 | static struct kset *kset_create(const char *name, | |
9cd43611 | 888 | const struct kset_uevent_ops *uevent_ops, |
b727c702 GKH |
889 | struct kobject *parent_kobj) |
890 | { | |
891 | struct kset *kset; | |
d9cd8f37 | 892 | int retval; |
b727c702 GKH |
893 | |
894 | kset = kzalloc(sizeof(*kset), GFP_KERNEL); | |
895 | if (!kset) | |
896 | return NULL; | |
b7165ebb | 897 | retval = kobject_set_name(&kset->kobj, "%s", name); |
d9cd8f37 DY |
898 | if (retval) { |
899 | kfree(kset); | |
900 | return NULL; | |
901 | } | |
b727c702 GKH |
902 | kset->uevent_ops = uevent_ops; |
903 | kset->kobj.parent = parent_kobj; | |
904 | ||
905 | /* | |
386f275f | 906 | * The kobject of this kset will have a type of kset_ktype and belong to |
b727c702 GKH |
907 | * no kset itself. That way we can properly free it when it is |
908 | * finished being used. | |
909 | */ | |
386f275f | 910 | kset->kobj.ktype = &kset_ktype; |
b727c702 GKH |
911 | kset->kobj.kset = NULL; |
912 | ||
913 | return kset; | |
914 | } | |
915 | ||
916 | /** | |
917 | * kset_create_and_add - create a struct kset dynamically and add it to sysfs | |
918 | * | |
919 | * @name: the name for the kset | |
920 | * @uevent_ops: a struct kset_uevent_ops for the kset | |
921 | * @parent_kobj: the parent kobject of this kset, if any. | |
922 | * | |
923 | * This function creates a kset structure dynamically and registers it | |
924 | * with sysfs. When you are finished with this structure, call | |
925 | * kset_unregister() and the structure will be dynamically freed when it | |
926 | * is no longer being used. | |
927 | * | |
928 | * If the kset was not able to be created, NULL will be returned. | |
929 | */ | |
930 | struct kset *kset_create_and_add(const char *name, | |
9cd43611 | 931 | const struct kset_uevent_ops *uevent_ops, |
b727c702 GKH |
932 | struct kobject *parent_kobj) |
933 | { | |
934 | struct kset *kset; | |
935 | int error; | |
936 | ||
937 | kset = kset_create(name, uevent_ops, parent_kobj); | |
938 | if (!kset) | |
939 | return NULL; | |
940 | error = kset_register(kset); | |
941 | if (error) { | |
942 | kfree(kset); | |
943 | return NULL; | |
944 | } | |
945 | return kset; | |
946 | } | |
947 | EXPORT_SYMBOL_GPL(kset_create_and_add); | |
948 | ||
bc451f20 EB |
949 | |
950 | static DEFINE_SPINLOCK(kobj_ns_type_lock); | |
951 | static const struct kobj_ns_type_operations *kobj_ns_ops_tbl[KOBJ_NS_TYPES]; | |
952 | ||
953 | int kobj_ns_type_register(const struct kobj_ns_type_operations *ops) | |
954 | { | |
955 | enum kobj_ns_type type = ops->type; | |
956 | int error; | |
957 | ||
958 | spin_lock(&kobj_ns_type_lock); | |
959 | ||
960 | error = -EINVAL; | |
961 | if (type >= KOBJ_NS_TYPES) | |
962 | goto out; | |
963 | ||
964 | error = -EINVAL; | |
965 | if (type <= KOBJ_NS_TYPE_NONE) | |
966 | goto out; | |
967 | ||
968 | error = -EBUSY; | |
969 | if (kobj_ns_ops_tbl[type]) | |
970 | goto out; | |
971 | ||
972 | error = 0; | |
973 | kobj_ns_ops_tbl[type] = ops; | |
974 | ||
975 | out: | |
976 | spin_unlock(&kobj_ns_type_lock); | |
977 | return error; | |
978 | } | |
979 | ||
980 | int kobj_ns_type_registered(enum kobj_ns_type type) | |
981 | { | |
982 | int registered = 0; | |
983 | ||
984 | spin_lock(&kobj_ns_type_lock); | |
985 | if ((type > KOBJ_NS_TYPE_NONE) && (type < KOBJ_NS_TYPES)) | |
986 | registered = kobj_ns_ops_tbl[type] != NULL; | |
987 | spin_unlock(&kobj_ns_type_lock); | |
988 | ||
989 | return registered; | |
990 | } | |
991 | ||
992 | const struct kobj_ns_type_operations *kobj_child_ns_ops(struct kobject *parent) | |
993 | { | |
994 | const struct kobj_ns_type_operations *ops = NULL; | |
995 | ||
996 | if (parent && parent->ktype->child_ns_type) | |
997 | ops = parent->ktype->child_ns_type(parent); | |
998 | ||
999 | return ops; | |
1000 | } | |
1001 | ||
1002 | const struct kobj_ns_type_operations *kobj_ns_ops(struct kobject *kobj) | |
1003 | { | |
1004 | return kobj_child_ns_ops(kobj->parent); | |
1005 | } | |
1006 | ||
7dc5dbc8 EB |
1007 | bool kobj_ns_current_may_mount(enum kobj_ns_type type) |
1008 | { | |
730d7d33 | 1009 | bool may_mount = true; |
7dc5dbc8 EB |
1010 | |
1011 | spin_lock(&kobj_ns_type_lock); | |
1012 | if ((type > KOBJ_NS_TYPE_NONE) && (type < KOBJ_NS_TYPES) && | |
1013 | kobj_ns_ops_tbl[type]) | |
1014 | may_mount = kobj_ns_ops_tbl[type]->current_may_mount(); | |
1015 | spin_unlock(&kobj_ns_type_lock); | |
1016 | ||
1017 | return may_mount; | |
1018 | } | |
bc451f20 | 1019 | |
a685e089 | 1020 | void *kobj_ns_grab_current(enum kobj_ns_type type) |
bc451f20 | 1021 | { |
a685e089 | 1022 | void *ns = NULL; |
bc451f20 EB |
1023 | |
1024 | spin_lock(&kobj_ns_type_lock); | |
1025 | if ((type > KOBJ_NS_TYPE_NONE) && (type < KOBJ_NS_TYPES) && | |
1026 | kobj_ns_ops_tbl[type]) | |
a685e089 | 1027 | ns = kobj_ns_ops_tbl[type]->grab_current_ns(); |
bc451f20 EB |
1028 | spin_unlock(&kobj_ns_type_lock); |
1029 | ||
1030 | return ns; | |
1031 | } | |
1032 | ||
1033 | const void *kobj_ns_netlink(enum kobj_ns_type type, struct sock *sk) | |
1034 | { | |
1035 | const void *ns = NULL; | |
1036 | ||
1037 | spin_lock(&kobj_ns_type_lock); | |
1038 | if ((type > KOBJ_NS_TYPE_NONE) && (type < KOBJ_NS_TYPES) && | |
1039 | kobj_ns_ops_tbl[type]) | |
1040 | ns = kobj_ns_ops_tbl[type]->netlink_ns(sk); | |
1041 | spin_unlock(&kobj_ns_type_lock); | |
1042 | ||
1043 | return ns; | |
1044 | } | |
1045 | ||
1046 | const void *kobj_ns_initial(enum kobj_ns_type type) | |
1047 | { | |
1048 | const void *ns = NULL; | |
1049 | ||
1050 | spin_lock(&kobj_ns_type_lock); | |
1051 | if ((type > KOBJ_NS_TYPE_NONE) && (type < KOBJ_NS_TYPES) && | |
1052 | kobj_ns_ops_tbl[type]) | |
1053 | ns = kobj_ns_ops_tbl[type]->initial_ns(); | |
1054 | spin_unlock(&kobj_ns_type_lock); | |
1055 | ||
1056 | return ns; | |
1057 | } | |
1058 | ||
a685e089 | 1059 | void kobj_ns_drop(enum kobj_ns_type type, void *ns) |
bc451f20 | 1060 | { |
a685e089 AV |
1061 | spin_lock(&kobj_ns_type_lock); |
1062 | if ((type > KOBJ_NS_TYPE_NONE) && (type < KOBJ_NS_TYPES) && | |
1063 | kobj_ns_ops_tbl[type] && kobj_ns_ops_tbl[type]->drop_ns) | |
1064 | kobj_ns_ops_tbl[type]->drop_ns(ns); | |
1065 | spin_unlock(&kobj_ns_type_lock); | |
bc451f20 EB |
1066 | } |
1067 | ||
1da177e4 LT |
1068 | EXPORT_SYMBOL(kobject_get); |
1069 | EXPORT_SYMBOL(kobject_put); | |
1da177e4 LT |
1070 | EXPORT_SYMBOL(kobject_del); |
1071 | ||
1072 | EXPORT_SYMBOL(kset_register); | |
1073 | EXPORT_SYMBOL(kset_unregister); |