Commit | Line | Data |
---|---|---|
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> |
89c86a64 | 21 | #include <linux/random.h> |
1da177e4 | 22 | |
e34ff490 TH |
23 | /** |
24 | * kobject_namespace - return @kobj's namespace tag | |
25 | * @kobj: kobject in question | |
26 | * | |
27 | * Returns namespace tag of @kobj if its parent has namespace ops enabled | |
28 | * and thus @kobj should have a namespace tag associated with it. Returns | |
29 | * %NULL otherwise. | |
30 | */ | |
31 | const void *kobject_namespace(struct kobject *kobj) | |
32 | { | |
33 | const struct kobj_ns_type_operations *ns_ops = kobj_ns_ops(kobj); | |
34 | ||
35 | if (!ns_ops || ns_ops->type == KOBJ_NS_TYPE_NONE) | |
36 | return NULL; | |
37 | ||
a1212d27 | 38 | return kobj->ktype->namespace(kobj); |
e34ff490 TH |
39 | } |
40 | ||
e374a2bf GKH |
41 | /* |
42 | * populate_dir - populate directory with attributes. | |
43 | * @kobj: object we're working on. | |
1da177e4 | 44 | * |
e374a2bf GKH |
45 | * Most subsystems have a set of default attributes that are associated |
46 | * with an object that registers with them. This is a helper called during | |
47 | * object registration that loops through the default attributes of the | |
48 | * subsystem and creates attributes files for them in sysfs. | |
1da177e4 | 49 | */ |
e374a2bf | 50 | static int populate_dir(struct kobject *kobj) |
1da177e4 | 51 | { |
e374a2bf GKH |
52 | struct kobj_type *t = get_ktype(kobj); |
53 | struct attribute *attr; | |
1da177e4 LT |
54 | int error = 0; |
55 | int i; | |
e374a2bf | 56 | |
1da177e4 LT |
57 | if (t && t->default_attrs) { |
58 | for (i = 0; (attr = t->default_attrs[i]) != NULL; i++) { | |
e374a2bf GKH |
59 | error = sysfs_create_file(kobj, attr); |
60 | if (error) | |
1da177e4 LT |
61 | break; |
62 | } | |
63 | } | |
64 | return error; | |
65 | } | |
66 | ||
e374a2bf | 67 | static int create_dir(struct kobject *kobj) |
1da177e4 | 68 | { |
c84a3b27 | 69 | const struct kobj_ns_type_operations *ops; |
e34ff490 TH |
70 | int error; |
71 | ||
72 | error = sysfs_create_dir_ns(kobj, kobject_namespace(kobj)); | |
c84a3b27 TH |
73 | if (error) |
74 | return error; | |
75 | ||
76 | error = populate_dir(kobj); | |
77 | if (error) { | |
78 | sysfs_remove_dir(kobj); | |
79 | return error; | |
1da177e4 | 80 | } |
26ea12de TH |
81 | |
82 | /* | |
83 | * @kobj->sd may be deleted by an ancestor going away. Hold an | |
84 | * extra reference so that it stays until @kobj is gone. | |
85 | */ | |
86 | sysfs_get(kobj->sd); | |
87 | ||
c84a3b27 TH |
88 | /* |
89 | * If @kobj has ns_ops, its children need to be filtered based on | |
90 | * their namespace tags. Enable namespace support on @kobj->sd. | |
91 | */ | |
92 | ops = kobj_child_ns_ops(kobj); | |
93 | if (ops) { | |
94 | BUG_ON(ops->type <= KOBJ_NS_TYPE_NONE); | |
95 | BUG_ON(ops->type >= KOBJ_NS_TYPES); | |
96 | BUG_ON(!kobj_ns_type_registered(ops->type)); | |
97 | ||
93b2b8e4 | 98 | kernfs_enable_ns(kobj->sd); |
c84a3b27 TH |
99 | } |
100 | ||
101 | return 0; | |
1da177e4 LT |
102 | } |
103 | ||
1da177e4 LT |
104 | static int get_kobj_path_length(struct kobject *kobj) |
105 | { | |
106 | int length = 1; | |
e374a2bf | 107 | struct kobject *parent = kobj; |
1da177e4 | 108 | |
e374a2bf | 109 | /* walk up the ancestors until we hit the one pointing to the |
1da177e4 LT |
110 | * root. |
111 | * Add 1 to strlen for leading '/' of each level. | |
112 | */ | |
113 | do { | |
b365b3da CE |
114 | if (kobject_name(parent) == NULL) |
115 | return 0; | |
1da177e4 LT |
116 | length += strlen(kobject_name(parent)) + 1; |
117 | parent = parent->parent; | |
118 | } while (parent); | |
119 | return length; | |
120 | } | |
121 | ||
122 | static void fill_kobj_path(struct kobject *kobj, char *path, int length) | |
123 | { | |
e374a2bf | 124 | struct kobject *parent; |
1da177e4 LT |
125 | |
126 | --length; | |
127 | for (parent = kobj; parent; parent = parent->parent) { | |
128 | int cur = strlen(kobject_name(parent)); | |
129 | /* back up enough to print this name with '/' */ | |
130 | length -= cur; | |
e374a2bf | 131 | strncpy(path + length, kobject_name(parent), cur); |
1da177e4 LT |
132 | *(path + --length) = '/'; |
133 | } | |
134 | ||
9f66fa2a | 135 | pr_debug("kobject: '%s' (%p): %s: path = '%s'\n", kobject_name(kobj), |
810304db | 136 | kobj, __func__, path); |
1da177e4 LT |
137 | } |
138 | ||
139 | /** | |
72fd4a35 | 140 | * kobject_get_path - generate and return the path associated with a given kobj and kset pair. |
1da177e4 LT |
141 | * |
142 | * @kobj: kobject in question, with which to build the path | |
143 | * @gfp_mask: the allocation type used to allocate the path | |
72fd4a35 RD |
144 | * |
145 | * The result must be freed by the caller with kfree(). | |
1da177e4 | 146 | */ |
fd4f2df2 | 147 | char *kobject_get_path(struct kobject *kobj, gfp_t gfp_mask) |
1da177e4 LT |
148 | { |
149 | char *path; | |
150 | int len; | |
151 | ||
152 | len = get_kobj_path_length(kobj); | |
b365b3da CE |
153 | if (len == 0) |
154 | return NULL; | |
4668edc3 | 155 | path = kzalloc(len, gfp_mask); |
1da177e4 LT |
156 | if (!path) |
157 | return NULL; | |
1da177e4 LT |
158 | fill_kobj_path(kobj, path, len); |
159 | ||
160 | return path; | |
161 | } | |
80fc9f53 | 162 | EXPORT_SYMBOL_GPL(kobject_get_path); |
1da177e4 | 163 | |
0f4dafc0 KS |
164 | /* add the kobject to its kset's list */ |
165 | static void kobj_kset_join(struct kobject *kobj) | |
1da177e4 | 166 | { |
0f4dafc0 | 167 | if (!kobj->kset) |
31b9025a | 168 | return; |
0f4dafc0 KS |
169 | |
170 | kset_get(kobj->kset); | |
171 | spin_lock(&kobj->kset->list_lock); | |
172 | list_add_tail(&kobj->entry, &kobj->kset->list); | |
173 | spin_unlock(&kobj->kset->list_lock); | |
1da177e4 LT |
174 | } |
175 | ||
0f4dafc0 KS |
176 | /* remove the kobject from its kset's list */ |
177 | static void kobj_kset_leave(struct kobject *kobj) | |
178 | { | |
179 | if (!kobj->kset) | |
180 | return; | |
1da177e4 | 181 | |
0f4dafc0 KS |
182 | spin_lock(&kobj->kset->list_lock); |
183 | list_del_init(&kobj->entry); | |
184 | spin_unlock(&kobj->kset->list_lock); | |
185 | kset_put(kobj->kset); | |
186 | } | |
1da177e4 | 187 | |
e374a2bf | 188 | static void kobject_init_internal(struct kobject *kobj) |
1da177e4 | 189 | { |
0f4dafc0 KS |
190 | if (!kobj) |
191 | return; | |
192 | kref_init(&kobj->kref); | |
193 | INIT_LIST_HEAD(&kobj->entry); | |
a4573c48 GKH |
194 | kobj->state_in_sysfs = 0; |
195 | kobj->state_add_uevent_sent = 0; | |
196 | kobj->state_remove_uevent_sent = 0; | |
197 | kobj->state_initialized = 1; | |
1da177e4 LT |
198 | } |
199 | ||
0f4dafc0 | 200 | |
9e7bbccd | 201 | static int kobject_add_internal(struct kobject *kobj) |
1da177e4 LT |
202 | { |
203 | int error = 0; | |
e374a2bf | 204 | struct kobject *parent; |
1da177e4 | 205 | |
0f4dafc0 | 206 | if (!kobj) |
1da177e4 | 207 | return -ENOENT; |
0f4dafc0 | 208 | |
af5ca3f4 | 209 | if (!kobj->name || !kobj->name[0]) { |
d955c78a | 210 | WARN(1, "kobject: (%p): attempted to be registered with empty " |
9f66fa2a | 211 | "name!\n", kobj); |
c171fef5 GKH |
212 | return -EINVAL; |
213 | } | |
1da177e4 | 214 | |
0f4dafc0 | 215 | parent = kobject_get(kobj->parent); |
1da177e4 | 216 | |
0f4dafc0 | 217 | /* join kset if set, use it as parent if we do not already have one */ |
1da177e4 | 218 | if (kobj->kset) { |
0f4dafc0 | 219 | if (!parent) |
1da177e4 | 220 | parent = kobject_get(&kobj->kset->kobj); |
0f4dafc0 | 221 | kobj_kset_join(kobj); |
460f7e9a | 222 | kobj->parent = parent; |
1da177e4 | 223 | } |
1da177e4 | 224 | |
0f4dafc0 | 225 | pr_debug("kobject: '%s' (%p): %s: parent: '%s', set: '%s'\n", |
810304db | 226 | kobject_name(kobj), kobj, __func__, |
0f4dafc0 | 227 | parent ? kobject_name(parent) : "<NULL>", |
e374a2bf | 228 | kobj->kset ? kobject_name(&kobj->kset->kobj) : "<NULL>"); |
0f4dafc0 | 229 | |
90bc6135 | 230 | error = create_dir(kobj); |
1da177e4 | 231 | if (error) { |
0f4dafc0 KS |
232 | kobj_kset_leave(kobj); |
233 | kobject_put(parent); | |
234 | kobj->parent = NULL; | |
dcd0da00 GKH |
235 | |
236 | /* be noisy on error issues */ | |
237 | if (error == -EEXIST) | |
282029c0 DW |
238 | WARN(1, "%s failed for %s with " |
239 | "-EEXIST, don't try to register things with " | |
240 | "the same name in the same directory.\n", | |
241 | __func__, kobject_name(kobj)); | |
dcd0da00 | 242 | else |
282029c0 DW |
243 | WARN(1, "%s failed for %s (error: %d parent: %s)\n", |
244 | __func__, kobject_name(kobj), error, | |
245 | parent ? kobject_name(parent) : "'none'"); | |
0f4dafc0 KS |
246 | } else |
247 | kobj->state_in_sysfs = 1; | |
1da177e4 LT |
248 | |
249 | return error; | |
250 | } | |
251 | ||
663a4743 GKH |
252 | /** |
253 | * kobject_set_name_vargs - Set the name of an kobject | |
254 | * @kobj: struct kobject to set the name of | |
255 | * @fmt: format string used to build the name | |
256 | * @vargs: vargs to format the string. | |
257 | */ | |
1fa5ae85 | 258 | int kobject_set_name_vargs(struct kobject *kobj, const char *fmt, |
663a4743 GKH |
259 | va_list vargs) |
260 | { | |
9f255651 KS |
261 | const char *old_name = kobj->name; |
262 | char *s; | |
663a4743 | 263 | |
8a577ffc KS |
264 | if (kobj->name && !fmt) |
265 | return 0; | |
266 | ||
a4ca6617 KS |
267 | kobj->name = kvasprintf(GFP_KERNEL, fmt, vargs); |
268 | if (!kobj->name) | |
269 | return -ENOMEM; | |
663a4743 | 270 | |
9f255651 | 271 | /* ewww... some of these buggers have '/' in the name ... */ |
25fdeb3f | 272 | while ((s = strchr(kobj->name, '/'))) |
9f255651 KS |
273 | s[0] = '!'; |
274 | ||
275 | kfree(old_name); | |
663a4743 GKH |
276 | return 0; |
277 | } | |
1da177e4 LT |
278 | |
279 | /** | |
8c4606b1 | 280 | * kobject_set_name - Set the name of a kobject |
663a4743 | 281 | * @kobj: struct kobject to set the name of |
8c4606b1 | 282 | * @fmt: format string used to build the name |
1da177e4 | 283 | * |
8c4606b1 GKH |
284 | * This sets the name of the kobject. If you have already added the |
285 | * kobject to the system, you must call kobject_rename() in order to | |
286 | * change the name of the kobject. | |
1da177e4 | 287 | */ |
663a4743 | 288 | int kobject_set_name(struct kobject *kobj, const char *fmt, ...) |
1da177e4 | 289 | { |
a4ca6617 | 290 | va_list vargs; |
663a4743 | 291 | int retval; |
1da177e4 | 292 | |
a4ca6617 KS |
293 | va_start(vargs, fmt); |
294 | retval = kobject_set_name_vargs(kobj, fmt, vargs); | |
295 | va_end(vargs); | |
1da177e4 | 296 | |
663a4743 | 297 | return retval; |
1da177e4 | 298 | } |
1da177e4 LT |
299 | EXPORT_SYMBOL(kobject_set_name); |
300 | ||
e86000d0 | 301 | /** |
f9cb074b | 302 | * kobject_init - initialize a kobject structure |
e86000d0 GKH |
303 | * @kobj: pointer to the kobject to initialize |
304 | * @ktype: pointer to the ktype for this kobject. | |
305 | * | |
306 | * This function will properly initialize a kobject such that it can then | |
307 | * be passed to the kobject_add() call. | |
308 | * | |
309 | * After this function is called, the kobject MUST be cleaned up by a call | |
310 | * to kobject_put(), not by a call to kfree directly to ensure that all of | |
311 | * the memory is cleaned up properly. | |
312 | */ | |
f9cb074b | 313 | void kobject_init(struct kobject *kobj, struct kobj_type *ktype) |
e86000d0 GKH |
314 | { |
315 | char *err_str; | |
316 | ||
317 | if (!kobj) { | |
318 | err_str = "invalid kobject pointer!"; | |
319 | goto error; | |
320 | } | |
321 | if (!ktype) { | |
322 | err_str = "must have a ktype to be initialized properly!\n"; | |
323 | goto error; | |
324 | } | |
0f4dafc0 | 325 | if (kobj->state_initialized) { |
e86000d0 | 326 | /* do not error out as sometimes we can recover */ |
0f4dafc0 KS |
327 | printk(KERN_ERR "kobject (%p): tried to init an initialized " |
328 | "object, something is seriously wrong.\n", kobj); | |
e86000d0 GKH |
329 | dump_stack(); |
330 | } | |
331 | ||
a4573c48 | 332 | kobject_init_internal(kobj); |
e86000d0 GKH |
333 | kobj->ktype = ktype; |
334 | return; | |
335 | ||
336 | error: | |
0f4dafc0 | 337 | printk(KERN_ERR "kobject (%p): %s\n", kobj, err_str); |
e86000d0 GKH |
338 | dump_stack(); |
339 | } | |
f9cb074b | 340 | EXPORT_SYMBOL(kobject_init); |
e86000d0 | 341 | |
244f6cee GKH |
342 | static int kobject_add_varg(struct kobject *kobj, struct kobject *parent, |
343 | const char *fmt, va_list vargs) | |
344 | { | |
244f6cee GKH |
345 | int retval; |
346 | ||
a4ca6617 | 347 | retval = kobject_set_name_vargs(kobj, fmt, vargs); |
244f6cee GKH |
348 | if (retval) { |
349 | printk(KERN_ERR "kobject: can not set name properly!\n"); | |
350 | return retval; | |
351 | } | |
352 | kobj->parent = parent; | |
9e7bbccd | 353 | return kobject_add_internal(kobj); |
244f6cee GKH |
354 | } |
355 | ||
356 | /** | |
b2d6db58 | 357 | * kobject_add - the main kobject add function |
244f6cee GKH |
358 | * @kobj: the kobject to add |
359 | * @parent: pointer to the parent of the kobject. | |
360 | * @fmt: format to name the kobject with. | |
361 | * | |
362 | * The kobject name is set and added to the kobject hierarchy in this | |
363 | * function. | |
364 | * | |
365 | * If @parent is set, then the parent of the @kobj will be set to it. | |
366 | * If @parent is NULL, then the parent of the @kobj will be set to the | |
367 | * kobject associted with the kset assigned to this kobject. If no kset | |
368 | * is assigned to the kobject, then the kobject will be located in the | |
369 | * root of the sysfs tree. | |
370 | * | |
371 | * If this function returns an error, kobject_put() must be called to | |
372 | * properly clean up the memory associated with the object. | |
244f6cee GKH |
373 | * Under no instance should the kobject that is passed to this function |
374 | * be directly freed with a call to kfree(), that can leak memory. | |
375 | * | |
0f4dafc0 | 376 | * Note, no "add" uevent will be created with this call, the caller should set |
244f6cee GKH |
377 | * up all of the necessary sysfs files for the object and then call |
378 | * kobject_uevent() with the UEVENT_ADD parameter to ensure that | |
379 | * userspace is properly notified of this kobject's creation. | |
380 | */ | |
b2d6db58 GKH |
381 | int kobject_add(struct kobject *kobj, struct kobject *parent, |
382 | const char *fmt, ...) | |
244f6cee GKH |
383 | { |
384 | va_list args; | |
385 | int retval; | |
386 | ||
387 | if (!kobj) | |
388 | return -EINVAL; | |
389 | ||
0f4dafc0 KS |
390 | if (!kobj->state_initialized) { |
391 | printk(KERN_ERR "kobject '%s' (%p): tried to add an " | |
392 | "uninitialized object, something is seriously wrong.\n", | |
393 | kobject_name(kobj), kobj); | |
394 | dump_stack(); | |
395 | return -EINVAL; | |
396 | } | |
244f6cee GKH |
397 | va_start(args, fmt); |
398 | retval = kobject_add_varg(kobj, parent, fmt, args); | |
399 | va_end(args); | |
400 | ||
401 | return retval; | |
402 | } | |
b2d6db58 | 403 | EXPORT_SYMBOL(kobject_add); |
244f6cee | 404 | |
c11c4154 GKH |
405 | /** |
406 | * kobject_init_and_add - initialize a kobject structure and add it to the kobject hierarchy | |
407 | * @kobj: pointer to the kobject to initialize | |
408 | * @ktype: pointer to the ktype for this kobject. | |
409 | * @parent: pointer to the parent of this kobject. | |
410 | * @fmt: the name of the kobject. | |
411 | * | |
f9cb074b | 412 | * This function combines the call to kobject_init() and |
b2d6db58 GKH |
413 | * kobject_add(). The same type of error handling after a call to |
414 | * kobject_add() and kobject lifetime rules are the same here. | |
c11c4154 GKH |
415 | */ |
416 | int kobject_init_and_add(struct kobject *kobj, struct kobj_type *ktype, | |
417 | struct kobject *parent, const char *fmt, ...) | |
418 | { | |
419 | va_list args; | |
420 | int retval; | |
421 | ||
f9cb074b | 422 | kobject_init(kobj, ktype); |
c11c4154 GKH |
423 | |
424 | va_start(args, fmt); | |
425 | retval = kobject_add_varg(kobj, parent, fmt, args); | |
426 | va_end(args); | |
427 | ||
428 | return retval; | |
429 | } | |
430 | EXPORT_SYMBOL_GPL(kobject_init_and_add); | |
431 | ||
1da177e4 | 432 | /** |
e374a2bf GKH |
433 | * kobject_rename - change the name of an object |
434 | * @kobj: object in question. | |
435 | * @new_name: object's new name | |
030c1d2b EB |
436 | * |
437 | * It is the responsibility of the caller to provide mutual | |
438 | * exclusion between two different calls of kobject_rename | |
439 | * on the same kobject and to ensure that new_name is valid and | |
440 | * won't conflict with other kobjects. | |
1da177e4 | 441 | */ |
e374a2bf | 442 | int kobject_rename(struct kobject *kobj, const char *new_name) |
1da177e4 LT |
443 | { |
444 | int error = 0; | |
ca2f37db | 445 | const char *devpath = NULL; |
0b4a4fea | 446 | const char *dup_name = NULL, *name; |
ca2f37db JT |
447 | char *devpath_string = NULL; |
448 | char *envp[2]; | |
1da177e4 LT |
449 | |
450 | kobj = kobject_get(kobj); | |
451 | if (!kobj) | |
452 | return -EINVAL; | |
b592fcfe EB |
453 | if (!kobj->parent) |
454 | return -EINVAL; | |
ca2f37db JT |
455 | |
456 | devpath = kobject_get_path(kobj, GFP_KERNEL); | |
457 | if (!devpath) { | |
458 | error = -ENOMEM; | |
459 | goto out; | |
460 | } | |
461 | devpath_string = kmalloc(strlen(devpath) + 15, GFP_KERNEL); | |
462 | if (!devpath_string) { | |
463 | error = -ENOMEM; | |
464 | goto out; | |
465 | } | |
466 | sprintf(devpath_string, "DEVPATH_OLD=%s", devpath); | |
467 | envp[0] = devpath_string; | |
468 | envp[1] = NULL; | |
ca2f37db | 469 | |
0b4a4fea EB |
470 | name = dup_name = kstrdup(new_name, GFP_KERNEL); |
471 | if (!name) { | |
472 | error = -ENOMEM; | |
473 | goto out; | |
474 | } | |
475 | ||
e34ff490 | 476 | error = sysfs_rename_dir_ns(kobj, new_name, kobject_namespace(kobj)); |
0b4a4fea EB |
477 | if (error) |
478 | goto out; | |
479 | ||
480 | /* Install the new kobject name */ | |
481 | dup_name = kobj->name; | |
482 | kobj->name = name; | |
ca2f37db JT |
483 | |
484 | /* This function is mostly/only used for network interface. | |
485 | * Some hotplug package track interfaces by their name and | |
486 | * therefore want to know when the name is changed by the user. */ | |
0b4a4fea | 487 | kobject_uevent_env(kobj, KOBJ_MOVE, envp); |
ca2f37db JT |
488 | |
489 | out: | |
0b4a4fea | 490 | kfree(dup_name); |
ca2f37db JT |
491 | kfree(devpath_string); |
492 | kfree(devpath); | |
b592fcfe EB |
493 | kobject_put(kobj); |
494 | ||
495 | return error; | |
496 | } | |
8344b568 | 497 | EXPORT_SYMBOL_GPL(kobject_rename); |
b592fcfe | 498 | |
8a82472f | 499 | /** |
e374a2bf GKH |
500 | * kobject_move - move object to another parent |
501 | * @kobj: object in question. | |
502 | * @new_parent: object's new parent (can be NULL) | |
8a82472f | 503 | */ |
8a82472f CH |
504 | int kobject_move(struct kobject *kobj, struct kobject *new_parent) |
505 | { | |
506 | int error; | |
507 | struct kobject *old_parent; | |
508 | const char *devpath = NULL; | |
509 | char *devpath_string = NULL; | |
510 | char *envp[2]; | |
511 | ||
512 | kobj = kobject_get(kobj); | |
513 | if (!kobj) | |
514 | return -EINVAL; | |
515 | new_parent = kobject_get(new_parent); | |
516 | if (!new_parent) { | |
c744aeae CH |
517 | if (kobj->kset) |
518 | new_parent = kobject_get(&kobj->kset->kobj); | |
8a82472f | 519 | } |
e34ff490 | 520 | |
8a82472f CH |
521 | /* old object path */ |
522 | devpath = kobject_get_path(kobj, GFP_KERNEL); | |
523 | if (!devpath) { | |
524 | error = -ENOMEM; | |
525 | goto out; | |
526 | } | |
527 | devpath_string = kmalloc(strlen(devpath) + 15, GFP_KERNEL); | |
528 | if (!devpath_string) { | |
529 | error = -ENOMEM; | |
530 | goto out; | |
531 | } | |
532 | sprintf(devpath_string, "DEVPATH_OLD=%s", devpath); | |
533 | envp[0] = devpath_string; | |
534 | envp[1] = NULL; | |
e34ff490 | 535 | error = sysfs_move_dir_ns(kobj, new_parent, kobject_namespace(kobj)); |
8a82472f CH |
536 | if (error) |
537 | goto out; | |
538 | old_parent = kobj->parent; | |
539 | kobj->parent = new_parent; | |
9e993efb | 540 | new_parent = NULL; |
8a82472f CH |
541 | kobject_put(old_parent); |
542 | kobject_uevent_env(kobj, KOBJ_MOVE, envp); | |
543 | out: | |
9e993efb | 544 | kobject_put(new_parent); |
8a82472f CH |
545 | kobject_put(kobj); |
546 | kfree(devpath_string); | |
547 | kfree(devpath); | |
548 | return error; | |
549 | } | |
550 | ||
1da177e4 | 551 | /** |
e374a2bf GKH |
552 | * kobject_del - unlink kobject from hierarchy. |
553 | * @kobj: object. | |
1da177e4 | 554 | */ |
e374a2bf | 555 | void kobject_del(struct kobject *kobj) |
1da177e4 | 556 | { |
26ea12de TH |
557 | struct sysfs_dirent *sd; |
558 | ||
31b9025a GKH |
559 | if (!kobj) |
560 | return; | |
0f4dafc0 | 561 | |
26ea12de | 562 | sd = kobj->sd; |
1da177e4 | 563 | sysfs_remove_dir(kobj); |
26ea12de TH |
564 | sysfs_put(sd); |
565 | ||
0f4dafc0 KS |
566 | kobj->state_in_sysfs = 0; |
567 | kobj_kset_leave(kobj); | |
568 | kobject_put(kobj->parent); | |
569 | kobj->parent = NULL; | |
1da177e4 LT |
570 | } |
571 | ||
1da177e4 | 572 | /** |
e374a2bf GKH |
573 | * kobject_get - increment refcount for object. |
574 | * @kobj: object. | |
1da177e4 | 575 | */ |
e374a2bf | 576 | struct kobject *kobject_get(struct kobject *kobj) |
1da177e4 LT |
577 | { |
578 | if (kobj) | |
579 | kref_get(&kobj->kref); | |
580 | return kobj; | |
581 | } | |
582 | ||
2d864e41 | 583 | static struct kobject * __must_check kobject_get_unless_zero(struct kobject *kobj) |
a49b7e82 LT |
584 | { |
585 | if (!kref_get_unless_zero(&kobj->kref)) | |
586 | kobj = NULL; | |
587 | return kobj; | |
588 | } | |
589 | ||
18041f47 GKH |
590 | /* |
591 | * kobject_cleanup - free kobject resources. | |
592 | * @kobj: object to cleanup | |
1da177e4 | 593 | */ |
18041f47 | 594 | static void kobject_cleanup(struct kobject *kobj) |
1da177e4 | 595 | { |
0f4dafc0 | 596 | struct kobj_type *t = get_ktype(kobj); |
af5ca3f4 | 597 | const char *name = kobj->name; |
1da177e4 | 598 | |
c817a67e RK |
599 | pr_debug("kobject: '%s' (%p): %s, parent %p\n", |
600 | kobject_name(kobj), kobj, __func__, kobj->parent); | |
0f4dafc0 KS |
601 | |
602 | if (t && !t->release) | |
603 | pr_debug("kobject: '%s' (%p): does not have a release() " | |
604 | "function, it is broken and must be fixed.\n", | |
605 | kobject_name(kobj), kobj); | |
606 | ||
607 | /* send "remove" if the caller did not do it but sent "add" */ | |
608 | if (kobj->state_add_uevent_sent && !kobj->state_remove_uevent_sent) { | |
609 | pr_debug("kobject: '%s' (%p): auto cleanup 'remove' event\n", | |
610 | kobject_name(kobj), kobj); | |
611 | kobject_uevent(kobj, KOBJ_REMOVE); | |
612 | } | |
613 | ||
614 | /* remove from sysfs if the caller did not do it */ | |
615 | if (kobj->state_in_sysfs) { | |
616 | pr_debug("kobject: '%s' (%p): auto cleanup kobject_del\n", | |
617 | kobject_name(kobj), kobj); | |
618 | kobject_del(kobj); | |
619 | } | |
620 | ||
ce2c9cb0 | 621 | if (t && t->release) { |
0f4dafc0 KS |
622 | pr_debug("kobject: '%s' (%p): calling ktype release\n", |
623 | kobject_name(kobj), kobj); | |
1da177e4 | 624 | t->release(kobj); |
0f4dafc0 KS |
625 | } |
626 | ||
627 | /* free name if we allocated it */ | |
af5ca3f4 | 628 | if (name) { |
0f4dafc0 | 629 | pr_debug("kobject: '%s': free name\n", name); |
ce2c9cb0 GKH |
630 | kfree(name); |
631 | } | |
1da177e4 LT |
632 | } |
633 | ||
c817a67e RK |
634 | #ifdef CONFIG_DEBUG_KOBJECT_RELEASE |
635 | static void kobject_delayed_cleanup(struct work_struct *work) | |
636 | { | |
637 | kobject_cleanup(container_of(to_delayed_work(work), | |
638 | struct kobject, release)); | |
639 | } | |
640 | #endif | |
641 | ||
1da177e4 LT |
642 | static void kobject_release(struct kref *kref) |
643 | { | |
c817a67e RK |
644 | struct kobject *kobj = container_of(kref, struct kobject, kref); |
645 | #ifdef CONFIG_DEBUG_KOBJECT_RELEASE | |
89c86a64 BH |
646 | unsigned long delay = HZ + HZ * (get_random_int() & 0x3); |
647 | pr_info("kobject: '%s' (%p): %s, parent %p (delayed %ld)\n", | |
648 | kobject_name(kobj), kobj, __func__, kobj->parent, delay); | |
c817a67e | 649 | INIT_DELAYED_WORK(&kobj->release, kobject_delayed_cleanup); |
89c86a64 BH |
650 | |
651 | schedule_delayed_work(&kobj->release, delay); | |
c817a67e RK |
652 | #else |
653 | kobject_cleanup(kobj); | |
654 | #endif | |
1da177e4 LT |
655 | } |
656 | ||
657 | /** | |
e374a2bf GKH |
658 | * kobject_put - decrement refcount for object. |
659 | * @kobj: object. | |
1da177e4 | 660 | * |
e374a2bf | 661 | * Decrement the refcount, and if 0, call kobject_cleanup(). |
1da177e4 | 662 | */ |
e374a2bf | 663 | void kobject_put(struct kobject *kobj) |
1da177e4 | 664 | { |
c1ebdae5 | 665 | if (kobj) { |
d955c78a AV |
666 | if (!kobj->state_initialized) |
667 | WARN(1, KERN_WARNING "kobject: '%s' (%p): is not " | |
c1ebdae5 GKH |
668 | "initialized, yet kobject_put() is being " |
669 | "called.\n", kobject_name(kobj), kobj); | |
1da177e4 | 670 | kref_put(&kobj->kref, kobject_release); |
c1ebdae5 | 671 | } |
1da177e4 LT |
672 | } |
673 | ||
3f9e3ee9 | 674 | static void dynamic_kobj_release(struct kobject *kobj) |
7423172a | 675 | { |
810304db | 676 | pr_debug("kobject: (%p): %s\n", kobj, __func__); |
7423172a JN |
677 | kfree(kobj); |
678 | } | |
679 | ||
3f9e3ee9 | 680 | static struct kobj_type dynamic_kobj_ktype = { |
386f275f KS |
681 | .release = dynamic_kobj_release, |
682 | .sysfs_ops = &kobj_sysfs_ops, | |
7423172a JN |
683 | }; |
684 | ||
43968d2f | 685 | /** |
3f9e3ee9 GKH |
686 | * kobject_create - create a struct kobject dynamically |
687 | * | |
688 | * This function creates a kobject structure dynamically and sets it up | |
689 | * to be a "dynamic" kobject with a default release function set up. | |
690 | * | |
691 | * If the kobject was not able to be created, NULL will be returned. | |
43968d2f | 692 | * The kobject structure returned from here must be cleaned up with a |
f9cb074b | 693 | * call to kobject_put() and not kfree(), as kobject_init() has |
43968d2f | 694 | * already been called on this structure. |
3f9e3ee9 | 695 | */ |
43968d2f | 696 | struct kobject *kobject_create(void) |
3f9e3ee9 GKH |
697 | { |
698 | struct kobject *kobj; | |
699 | ||
700 | kobj = kzalloc(sizeof(*kobj), GFP_KERNEL); | |
701 | if (!kobj) | |
702 | return NULL; | |
703 | ||
f9cb074b | 704 | kobject_init(kobj, &dynamic_kobj_ktype); |
3f9e3ee9 GKH |
705 | return kobj; |
706 | } | |
707 | ||
708 | /** | |
709 | * kobject_create_and_add - create a struct kobject dynamically and register it with sysfs | |
710 | * | |
9ff1f838 | 711 | * @name: the name for the kobject |
3f9e3ee9 GKH |
712 | * @parent: the parent kobject of this kobject, if any. |
713 | * | |
f70701a3 | 714 | * This function creates a kobject structure dynamically and registers it |
3f9e3ee9 | 715 | * with sysfs. When you are finished with this structure, call |
78a2d906 | 716 | * kobject_put() and the structure will be dynamically freed when |
3f9e3ee9 GKH |
717 | * it is no longer being used. |
718 | * | |
719 | * If the kobject was not able to be created, NULL will be returned. | |
720 | */ | |
721 | struct kobject *kobject_create_and_add(const char *name, struct kobject *parent) | |
722 | { | |
723 | struct kobject *kobj; | |
724 | int retval; | |
725 | ||
726 | kobj = kobject_create(); | |
727 | if (!kobj) | |
728 | return NULL; | |
729 | ||
b2d6db58 | 730 | retval = kobject_add(kobj, parent, "%s", name); |
3f9e3ee9 GKH |
731 | if (retval) { |
732 | printk(KERN_WARNING "%s: kobject_add error: %d\n", | |
810304db | 733 | __func__, retval); |
3f9e3ee9 GKH |
734 | kobject_put(kobj); |
735 | kobj = NULL; | |
736 | } | |
737 | return kobj; | |
738 | } | |
739 | EXPORT_SYMBOL_GPL(kobject_create_and_add); | |
740 | ||
1da177e4 | 741 | /** |
e374a2bf GKH |
742 | * kset_init - initialize a kset for use |
743 | * @k: kset | |
1da177e4 | 744 | */ |
e374a2bf | 745 | void kset_init(struct kset *k) |
1da177e4 | 746 | { |
e1543ddf | 747 | kobject_init_internal(&k->kobj); |
1da177e4 LT |
748 | INIT_LIST_HEAD(&k->list); |
749 | spin_lock_init(&k->list_lock); | |
750 | } | |
751 | ||
23b5212c KS |
752 | /* default kobject attribute operations */ |
753 | static ssize_t kobj_attr_show(struct kobject *kobj, struct attribute *attr, | |
754 | char *buf) | |
755 | { | |
756 | struct kobj_attribute *kattr; | |
757 | ssize_t ret = -EIO; | |
758 | ||
759 | kattr = container_of(attr, struct kobj_attribute, attr); | |
760 | if (kattr->show) | |
761 | ret = kattr->show(kobj, kattr, buf); | |
762 | return ret; | |
763 | } | |
764 | ||
765 | static ssize_t kobj_attr_store(struct kobject *kobj, struct attribute *attr, | |
766 | const char *buf, size_t count) | |
767 | { | |
768 | struct kobj_attribute *kattr; | |
769 | ssize_t ret = -EIO; | |
770 | ||
771 | kattr = container_of(attr, struct kobj_attribute, attr); | |
772 | if (kattr->store) | |
773 | ret = kattr->store(kobj, kattr, buf, count); | |
774 | return ret; | |
775 | } | |
776 | ||
52cf25d0 | 777 | const struct sysfs_ops kobj_sysfs_ops = { |
23b5212c KS |
778 | .show = kobj_attr_show, |
779 | .store = kobj_attr_store, | |
780 | }; | |
1da177e4 | 781 | |
eee03164 JM |
782 | /** |
783 | * kobj_completion_init - initialize a kobj_completion object. | |
784 | * @kc: kobj_completion | |
785 | * @ktype: type of kobject to initialize | |
786 | * | |
787 | * kobj_completion structures can be embedded within structures with different | |
788 | * lifetime rules. During the release of the enclosing object, we can | |
789 | * wait on the release of the kobject so that we don't free it while it's | |
790 | * still busy. | |
791 | */ | |
792 | void kobj_completion_init(struct kobj_completion *kc, struct kobj_type *ktype) | |
793 | { | |
794 | init_completion(&kc->kc_unregister); | |
795 | kobject_init(&kc->kc_kobj, ktype); | |
796 | } | |
797 | EXPORT_SYMBOL_GPL(kobj_completion_init); | |
798 | ||
799 | /** | |
800 | * kobj_completion_release - release a kobj_completion object | |
801 | * @kobj: kobject embedded in kobj_completion | |
802 | * | |
803 | * Used with kobject_release to notify waiters that the kobject has been | |
804 | * released. | |
805 | */ | |
806 | void kobj_completion_release(struct kobject *kobj) | |
807 | { | |
808 | struct kobj_completion *kc = kobj_to_kobj_completion(kobj); | |
809 | complete(&kc->kc_unregister); | |
810 | } | |
811 | EXPORT_SYMBOL_GPL(kobj_completion_release); | |
812 | ||
813 | /** | |
814 | * kobj_completion_del_and_wait - release the kobject and wait for it | |
815 | * @kc: kobj_completion object to release | |
816 | * | |
817 | * Delete the kobject from sysfs and drop the reference count. Then wait | |
818 | * until any other outstanding references are also dropped. This routine | |
819 | * is only necessary once other references may have been taken on the | |
820 | * kobject. Typically this happens when the kobject has been published | |
821 | * to sysfs via kobject_add. | |
822 | */ | |
823 | void kobj_completion_del_and_wait(struct kobj_completion *kc) | |
824 | { | |
825 | kobject_del(&kc->kc_kobj); | |
826 | kobject_put(&kc->kc_kobj); | |
827 | wait_for_completion(&kc->kc_unregister); | |
828 | } | |
829 | EXPORT_SYMBOL_GPL(kobj_completion_del_and_wait); | |
830 | ||
1da177e4 | 831 | /** |
e374a2bf GKH |
832 | * kset_register - initialize and add a kset. |
833 | * @k: kset. | |
1da177e4 | 834 | */ |
e374a2bf | 835 | int kset_register(struct kset *k) |
1da177e4 | 836 | { |
80f03e34 KS |
837 | int err; |
838 | ||
31b9025a GKH |
839 | if (!k) |
840 | return -EINVAL; | |
80f03e34 | 841 | |
1da177e4 | 842 | kset_init(k); |
12e339ac | 843 | err = kobject_add_internal(&k->kobj); |
80f03e34 KS |
844 | if (err) |
845 | return err; | |
846 | kobject_uevent(&k->kobj, KOBJ_ADD); | |
847 | return 0; | |
1da177e4 LT |
848 | } |
849 | ||
1da177e4 | 850 | /** |
e374a2bf GKH |
851 | * kset_unregister - remove a kset. |
852 | * @k: kset. | |
1da177e4 | 853 | */ |
e374a2bf | 854 | void kset_unregister(struct kset *k) |
1da177e4 | 855 | { |
31b9025a GKH |
856 | if (!k) |
857 | return; | |
78a2d906 | 858 | kobject_put(&k->kobj); |
1da177e4 LT |
859 | } |
860 | ||
1da177e4 | 861 | /** |
e374a2bf GKH |
862 | * kset_find_obj - search for object in kset. |
863 | * @kset: kset we're looking in. | |
864 | * @name: object's name. | |
1da177e4 | 865 | * |
e374a2bf GKH |
866 | * Lock kset via @kset->subsys, and iterate over @kset->list, |
867 | * looking for a matching kobject. If matching object is found | |
868 | * take a reference and return the object. | |
1da177e4 | 869 | */ |
e374a2bf | 870 | struct kobject *kset_find_obj(struct kset *kset, const char *name) |
1da177e4 | 871 | { |
c6a2a3dc | 872 | struct kobject *k; |
e374a2bf | 873 | struct kobject *ret = NULL; |
1da177e4 LT |
874 | |
875 | spin_lock(&kset->list_lock); | |
c25d1dfb | 876 | |
c6a2a3dc | 877 | list_for_each_entry(k, &kset->list, entry) { |
e374a2bf | 878 | if (kobject_name(k) && !strcmp(kobject_name(k), name)) { |
a49b7e82 | 879 | ret = kobject_get_unless_zero(k); |
1da177e4 LT |
880 | break; |
881 | } | |
882 | } | |
c25d1dfb | 883 | |
1da177e4 LT |
884 | spin_unlock(&kset->list_lock); |
885 | return ret; | |
886 | } | |
887 | ||
b727c702 GKH |
888 | static void kset_release(struct kobject *kobj) |
889 | { | |
890 | struct kset *kset = container_of(kobj, struct kset, kobj); | |
9f66fa2a | 891 | pr_debug("kobject: '%s' (%p): %s\n", |
810304db | 892 | kobject_name(kobj), kobj, __func__); |
b727c702 GKH |
893 | kfree(kset); |
894 | } | |
895 | ||
386f275f KS |
896 | static struct kobj_type kset_ktype = { |
897 | .sysfs_ops = &kobj_sysfs_ops, | |
b727c702 GKH |
898 | .release = kset_release, |
899 | }; | |
900 | ||
901 | /** | |
902 | * kset_create - create a struct kset dynamically | |
903 | * | |
904 | * @name: the name for the kset | |
905 | * @uevent_ops: a struct kset_uevent_ops for the kset | |
906 | * @parent_kobj: the parent kobject of this kset, if any. | |
907 | * | |
908 | * This function creates a kset structure dynamically. This structure can | |
909 | * then be registered with the system and show up in sysfs with a call to | |
910 | * kset_register(). When you are finished with this structure, if | |
911 | * kset_register() has been called, call kset_unregister() and the | |
912 | * structure will be dynamically freed when it is no longer being used. | |
913 | * | |
914 | * If the kset was not able to be created, NULL will be returned. | |
915 | */ | |
916 | static struct kset *kset_create(const char *name, | |
9cd43611 | 917 | const struct kset_uevent_ops *uevent_ops, |
b727c702 GKH |
918 | struct kobject *parent_kobj) |
919 | { | |
920 | struct kset *kset; | |
d9cd8f37 | 921 | int retval; |
b727c702 GKH |
922 | |
923 | kset = kzalloc(sizeof(*kset), GFP_KERNEL); | |
924 | if (!kset) | |
925 | return NULL; | |
b7165ebb | 926 | retval = kobject_set_name(&kset->kobj, "%s", name); |
d9cd8f37 DY |
927 | if (retval) { |
928 | kfree(kset); | |
929 | return NULL; | |
930 | } | |
b727c702 GKH |
931 | kset->uevent_ops = uevent_ops; |
932 | kset->kobj.parent = parent_kobj; | |
933 | ||
934 | /* | |
386f275f | 935 | * The kobject of this kset will have a type of kset_ktype and belong to |
b727c702 GKH |
936 | * no kset itself. That way we can properly free it when it is |
937 | * finished being used. | |
938 | */ | |
386f275f | 939 | kset->kobj.ktype = &kset_ktype; |
b727c702 GKH |
940 | kset->kobj.kset = NULL; |
941 | ||
942 | return kset; | |
943 | } | |
944 | ||
945 | /** | |
946 | * kset_create_and_add - create a struct kset dynamically and add it to sysfs | |
947 | * | |
948 | * @name: the name for the kset | |
949 | * @uevent_ops: a struct kset_uevent_ops for the kset | |
950 | * @parent_kobj: the parent kobject of this kset, if any. | |
951 | * | |
952 | * This function creates a kset structure dynamically and registers it | |
953 | * with sysfs. When you are finished with this structure, call | |
954 | * kset_unregister() and the structure will be dynamically freed when it | |
955 | * is no longer being used. | |
956 | * | |
957 | * If the kset was not able to be created, NULL will be returned. | |
958 | */ | |
959 | struct kset *kset_create_and_add(const char *name, | |
9cd43611 | 960 | const struct kset_uevent_ops *uevent_ops, |
b727c702 GKH |
961 | struct kobject *parent_kobj) |
962 | { | |
963 | struct kset *kset; | |
964 | int error; | |
965 | ||
966 | kset = kset_create(name, uevent_ops, parent_kobj); | |
967 | if (!kset) | |
968 | return NULL; | |
969 | error = kset_register(kset); | |
970 | if (error) { | |
971 | kfree(kset); | |
972 | return NULL; | |
973 | } | |
974 | return kset; | |
975 | } | |
976 | EXPORT_SYMBOL_GPL(kset_create_and_add); | |
977 | ||
bc451f20 EB |
978 | |
979 | static DEFINE_SPINLOCK(kobj_ns_type_lock); | |
980 | static const struct kobj_ns_type_operations *kobj_ns_ops_tbl[KOBJ_NS_TYPES]; | |
981 | ||
982 | int kobj_ns_type_register(const struct kobj_ns_type_operations *ops) | |
983 | { | |
984 | enum kobj_ns_type type = ops->type; | |
985 | int error; | |
986 | ||
987 | spin_lock(&kobj_ns_type_lock); | |
988 | ||
989 | error = -EINVAL; | |
990 | if (type >= KOBJ_NS_TYPES) | |
991 | goto out; | |
992 | ||
993 | error = -EINVAL; | |
994 | if (type <= KOBJ_NS_TYPE_NONE) | |
995 | goto out; | |
996 | ||
997 | error = -EBUSY; | |
998 | if (kobj_ns_ops_tbl[type]) | |
999 | goto out; | |
1000 | ||
1001 | error = 0; | |
1002 | kobj_ns_ops_tbl[type] = ops; | |
1003 | ||
1004 | out: | |
1005 | spin_unlock(&kobj_ns_type_lock); | |
1006 | return error; | |
1007 | } | |
1008 | ||
1009 | int kobj_ns_type_registered(enum kobj_ns_type type) | |
1010 | { | |
1011 | int registered = 0; | |
1012 | ||
1013 | spin_lock(&kobj_ns_type_lock); | |
1014 | if ((type > KOBJ_NS_TYPE_NONE) && (type < KOBJ_NS_TYPES)) | |
1015 | registered = kobj_ns_ops_tbl[type] != NULL; | |
1016 | spin_unlock(&kobj_ns_type_lock); | |
1017 | ||
1018 | return registered; | |
1019 | } | |
1020 | ||
1021 | const struct kobj_ns_type_operations *kobj_child_ns_ops(struct kobject *parent) | |
1022 | { | |
1023 | const struct kobj_ns_type_operations *ops = NULL; | |
1024 | ||
1025 | if (parent && parent->ktype->child_ns_type) | |
1026 | ops = parent->ktype->child_ns_type(parent); | |
1027 | ||
1028 | return ops; | |
1029 | } | |
1030 | ||
1031 | const struct kobj_ns_type_operations *kobj_ns_ops(struct kobject *kobj) | |
1032 | { | |
1033 | return kobj_child_ns_ops(kobj->parent); | |
1034 | } | |
1035 | ||
7dc5dbc8 EB |
1036 | bool kobj_ns_current_may_mount(enum kobj_ns_type type) |
1037 | { | |
730d7d33 | 1038 | bool may_mount = true; |
7dc5dbc8 EB |
1039 | |
1040 | spin_lock(&kobj_ns_type_lock); | |
1041 | if ((type > KOBJ_NS_TYPE_NONE) && (type < KOBJ_NS_TYPES) && | |
1042 | kobj_ns_ops_tbl[type]) | |
1043 | may_mount = kobj_ns_ops_tbl[type]->current_may_mount(); | |
1044 | spin_unlock(&kobj_ns_type_lock); | |
1045 | ||
1046 | return may_mount; | |
1047 | } | |
bc451f20 | 1048 | |
a685e089 | 1049 | void *kobj_ns_grab_current(enum kobj_ns_type type) |
bc451f20 | 1050 | { |
a685e089 | 1051 | void *ns = NULL; |
bc451f20 EB |
1052 | |
1053 | spin_lock(&kobj_ns_type_lock); | |
1054 | if ((type > KOBJ_NS_TYPE_NONE) && (type < KOBJ_NS_TYPES) && | |
1055 | kobj_ns_ops_tbl[type]) | |
a685e089 | 1056 | ns = kobj_ns_ops_tbl[type]->grab_current_ns(); |
bc451f20 EB |
1057 | spin_unlock(&kobj_ns_type_lock); |
1058 | ||
1059 | return ns; | |
1060 | } | |
1061 | ||
1062 | const void *kobj_ns_netlink(enum kobj_ns_type type, struct sock *sk) | |
1063 | { | |
1064 | const void *ns = NULL; | |
1065 | ||
1066 | spin_lock(&kobj_ns_type_lock); | |
1067 | if ((type > KOBJ_NS_TYPE_NONE) && (type < KOBJ_NS_TYPES) && | |
1068 | kobj_ns_ops_tbl[type]) | |
1069 | ns = kobj_ns_ops_tbl[type]->netlink_ns(sk); | |
1070 | spin_unlock(&kobj_ns_type_lock); | |
1071 | ||
1072 | return ns; | |
1073 | } | |
1074 | ||
1075 | const void *kobj_ns_initial(enum kobj_ns_type type) | |
1076 | { | |
1077 | const void *ns = NULL; | |
1078 | ||
1079 | spin_lock(&kobj_ns_type_lock); | |
1080 | if ((type > KOBJ_NS_TYPE_NONE) && (type < KOBJ_NS_TYPES) && | |
1081 | kobj_ns_ops_tbl[type]) | |
1082 | ns = kobj_ns_ops_tbl[type]->initial_ns(); | |
1083 | spin_unlock(&kobj_ns_type_lock); | |
1084 | ||
1085 | return ns; | |
1086 | } | |
1087 | ||
a685e089 | 1088 | void kobj_ns_drop(enum kobj_ns_type type, void *ns) |
bc451f20 | 1089 | { |
a685e089 AV |
1090 | spin_lock(&kobj_ns_type_lock); |
1091 | if ((type > KOBJ_NS_TYPE_NONE) && (type < KOBJ_NS_TYPES) && | |
1092 | kobj_ns_ops_tbl[type] && kobj_ns_ops_tbl[type]->drop_ns) | |
1093 | kobj_ns_ops_tbl[type]->drop_ns(ns); | |
1094 | spin_unlock(&kobj_ns_type_lock); | |
bc451f20 EB |
1095 | } |
1096 | ||
1da177e4 LT |
1097 | EXPORT_SYMBOL(kobject_get); |
1098 | EXPORT_SYMBOL(kobject_put); | |
1da177e4 LT |
1099 | EXPORT_SYMBOL(kobject_del); |
1100 | ||
1101 | EXPORT_SYMBOL(kset_register); | |
1102 | EXPORT_SYMBOL(kset_unregister); |