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Commit | Line | Data |
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1da177e4 | 1 | /* |
6d66f5cd TH |
2 | * fs/sysfs/file.c - sysfs regular (text) file implementation |
3 | * | |
4 | * Copyright (c) 2001-3 Patrick Mochel | |
5 | * Copyright (c) 2007 SUSE Linux Products GmbH | |
6 | * Copyright (c) 2007 Tejun Heo <teheo@suse.de> | |
7 | * | |
8 | * This file is released under the GPLv2. | |
9 | * | |
10 | * Please see Documentation/filesystems/sysfs.txt for more information. | |
1da177e4 LT |
11 | */ |
12 | ||
13 | #include <linux/module.h> | |
1da177e4 | 14 | #include <linux/kobject.h> |
815d2d50 | 15 | #include <linux/kallsyms.h> |
c6f87733 | 16 | #include <linux/slab.h> |
94bebf4d | 17 | #include <linux/list.h> |
52e8c209 | 18 | #include <linux/mutex.h> |
13c589d5 | 19 | #include <linux/seq_file.h> |
1da177e4 LT |
20 | |
21 | #include "sysfs.h" | |
414985ae | 22 | #include "../kernfs/kernfs-internal.h" |
f6acf8bb | 23 | |
375b611e | 24 | /* |
324a56e1 | 25 | * Determine ktype->sysfs_ops for the given kernfs_node. This function |
375b611e TH |
26 | * must be called while holding an active reference. |
27 | */ | |
324a56e1 | 28 | static const struct sysfs_ops *sysfs_file_ops(struct kernfs_node *kn) |
375b611e | 29 | { |
adc5e8b5 | 30 | struct kobject *kobj = kn->parent->priv; |
375b611e | 31 | |
df23fc39 | 32 | if (kn->flags & KERNFS_LOCKDEP) |
324a56e1 | 33 | lockdep_assert_held(kn); |
375b611e TH |
34 | return kobj->ktype ? kobj->ktype->sysfs_ops : NULL; |
35 | } | |
36 | ||
13c589d5 TH |
37 | /* |
38 | * Reads on sysfs are handled through seq_file, which takes care of hairy | |
39 | * details like buffering and seeking. The following function pipes | |
40 | * sysfs_ops->show() result through seq_file. | |
1da177e4 | 41 | */ |
c2b19daf | 42 | static int sysfs_kf_seq_show(struct seq_file *sf, void *v) |
1da177e4 | 43 | { |
c525aadd | 44 | struct kernfs_open_file *of = sf->private; |
adc5e8b5 | 45 | struct kobject *kobj = of->kn->parent->priv; |
324a56e1 | 46 | const struct sysfs_ops *ops = sysfs_file_ops(of->kn); |
1da177e4 | 47 | ssize_t count; |
c2b19daf | 48 | char *buf; |
1da177e4 | 49 | |
f5c16f29 | 50 | /* acquire buffer and ensure that it's >= PAGE_SIZE and clear */ |
13c589d5 TH |
51 | count = seq_get_buf(sf, &buf); |
52 | if (count < PAGE_SIZE) { | |
53 | seq_commit(sf, -1); | |
54 | return 0; | |
55 | } | |
f5c16f29 | 56 | memset(buf, 0, PAGE_SIZE); |
1da177e4 | 57 | |
13c589d5 | 58 | /* |
c2b19daf TH |
59 | * Invoke show(). Control may reach here via seq file lseek even |
60 | * if @ops->show() isn't implemented. | |
13c589d5 | 61 | */ |
c2b19daf | 62 | if (ops->show) { |
324a56e1 | 63 | count = ops->show(kobj, of->kn->priv, buf); |
c2b19daf TH |
64 | if (count < 0) |
65 | return count; | |
66 | } | |
0ab66088 | 67 | |
8118a859 MX |
68 | /* |
69 | * The code works fine with PAGE_SIZE return but it's likely to | |
70 | * indicate truncated result or overflow in normal use cases. | |
71 | */ | |
815d2d50 AM |
72 | if (count >= (ssize_t)PAGE_SIZE) { |
73 | print_symbol("fill_read_buffer: %s returned bad count\n", | |
74 | (unsigned long)ops->show); | |
75 | /* Try to struggle along */ | |
76 | count = PAGE_SIZE - 1; | |
77 | } | |
13c589d5 TH |
78 | seq_commit(sf, count); |
79 | return 0; | |
1da177e4 LT |
80 | } |
81 | ||
c525aadd | 82 | static ssize_t sysfs_kf_bin_read(struct kernfs_open_file *of, char *buf, |
c2b19daf | 83 | size_t count, loff_t pos) |
2f0c6b75 | 84 | { |
324a56e1 | 85 | struct bin_attribute *battr = of->kn->priv; |
adc5e8b5 | 86 | struct kobject *kobj = of->kn->parent->priv; |
c2b19daf | 87 | loff_t size = file_inode(of->file)->i_size; |
2f0c6b75 | 88 | |
c2b19daf | 89 | if (!count) |
2f0c6b75 TH |
90 | return 0; |
91 | ||
92 | if (size) { | |
eaa5cd92 | 93 | if (pos >= size) |
2f0c6b75 | 94 | return 0; |
c2b19daf TH |
95 | if (pos + count > size) |
96 | count = size - pos; | |
2f0c6b75 TH |
97 | } |
98 | ||
c2b19daf TH |
99 | if (!battr->read) |
100 | return -EIO; | |
101 | ||
102 | return battr->read(of->file, kobj, battr, buf, pos, count); | |
103 | } | |
104 | ||
4ef67a8c N |
105 | /* kernfs read callback for regular sysfs files with pre-alloc */ |
106 | static ssize_t sysfs_kf_read(struct kernfs_open_file *of, char *buf, | |
107 | size_t count, loff_t pos) | |
108 | { | |
109 | const struct sysfs_ops *ops = sysfs_file_ops(of->kn); | |
110 | struct kobject *kobj = of->kn->parent->priv; | |
65da3484 | 111 | size_t len; |
4ef67a8c N |
112 | |
113 | /* | |
114 | * If buf != of->prealloc_buf, we don't know how | |
115 | * large it is, so cannot safely pass it to ->show | |
116 | */ | |
17d0774f | 117 | if (WARN_ON_ONCE(buf != of->prealloc_buf)) |
4ef67a8c | 118 | return 0; |
65da3484 | 119 | len = ops->show(kobj, of->kn->priv, buf); |
17d0774f KK |
120 | if (pos) { |
121 | if (len <= pos) | |
122 | return 0; | |
123 | len -= pos; | |
124 | memmove(buf, buf + pos, len); | |
125 | } | |
65da3484 | 126 | return min(count, len); |
4ef67a8c N |
127 | } |
128 | ||
50b38ca0 | 129 | /* kernfs write callback for regular sysfs files */ |
c525aadd | 130 | static ssize_t sysfs_kf_write(struct kernfs_open_file *of, char *buf, |
50b38ca0 | 131 | size_t count, loff_t pos) |
1da177e4 | 132 | { |
324a56e1 | 133 | const struct sysfs_ops *ops = sysfs_file_ops(of->kn); |
adc5e8b5 | 134 | struct kobject *kobj = of->kn->parent->priv; |
0ab66088 | 135 | |
50b38ca0 TH |
136 | if (!count) |
137 | return 0; | |
0ab66088 | 138 | |
324a56e1 | 139 | return ops->store(kobj, of->kn->priv, buf, count); |
50b38ca0 | 140 | } |
f9b9a621 | 141 | |
50b38ca0 | 142 | /* kernfs write callback for bin sysfs files */ |
c525aadd | 143 | static ssize_t sysfs_kf_bin_write(struct kernfs_open_file *of, char *buf, |
50b38ca0 TH |
144 | size_t count, loff_t pos) |
145 | { | |
324a56e1 | 146 | struct bin_attribute *battr = of->kn->priv; |
adc5e8b5 | 147 | struct kobject *kobj = of->kn->parent->priv; |
50b38ca0 | 148 | loff_t size = file_inode(of->file)->i_size; |
f9b9a621 | 149 | |
50b38ca0 TH |
150 | if (size) { |
151 | if (size <= pos) | |
09368960 | 152 | return -EFBIG; |
50b38ca0 | 153 | count = min_t(ssize_t, count, size - pos); |
f9b9a621 | 154 | } |
50b38ca0 TH |
155 | if (!count) |
156 | return 0; | |
0ab66088 | 157 | |
50b38ca0 TH |
158 | if (!battr->write) |
159 | return -EIO; | |
1da177e4 | 160 | |
50b38ca0 | 161 | return battr->write(of->file, kobj, battr, buf, pos, count); |
1da177e4 LT |
162 | } |
163 | ||
c525aadd | 164 | static int sysfs_kf_bin_mmap(struct kernfs_open_file *of, |
fdbffaa4 TH |
165 | struct vm_area_struct *vma) |
166 | { | |
324a56e1 | 167 | struct bin_attribute *battr = of->kn->priv; |
adc5e8b5 | 168 | struct kobject *kobj = of->kn->parent->priv; |
fdbffaa4 | 169 | |
fdbffaa4 TH |
170 | return battr->mmap(of->file, kobj, battr, vma); |
171 | } | |
172 | ||
324a56e1 | 173 | void sysfs_notify(struct kobject *kobj, const char *dir, const char *attr) |
4508a7a7 | 174 | { |
324a56e1 | 175 | struct kernfs_node *kn = kobj->sd, *tmp; |
51225039 | 176 | |
324a56e1 TH |
177 | if (kn && dir) |
178 | kn = kernfs_find_and_get(kn, dir); | |
024f6471 | 179 | else |
324a56e1 | 180 | kernfs_get(kn); |
024f6471 | 181 | |
324a56e1 TH |
182 | if (kn && attr) { |
183 | tmp = kernfs_find_and_get(kn, attr); | |
184 | kernfs_put(kn); | |
185 | kn = tmp; | |
024f6471 | 186 | } |
51225039 | 187 | |
324a56e1 TH |
188 | if (kn) { |
189 | kernfs_notify(kn); | |
190 | kernfs_put(kn); | |
024f6471 | 191 | } |
4508a7a7 N |
192 | } |
193 | EXPORT_SYMBOL_GPL(sysfs_notify); | |
194 | ||
f6acf8bb TH |
195 | static const struct kernfs_ops sysfs_file_kfops_empty = { |
196 | }; | |
197 | ||
198 | static const struct kernfs_ops sysfs_file_kfops_ro = { | |
199 | .seq_show = sysfs_kf_seq_show, | |
200 | }; | |
201 | ||
202 | static const struct kernfs_ops sysfs_file_kfops_wo = { | |
203 | .write = sysfs_kf_write, | |
204 | }; | |
205 | ||
206 | static const struct kernfs_ops sysfs_file_kfops_rw = { | |
207 | .seq_show = sysfs_kf_seq_show, | |
208 | .write = sysfs_kf_write, | |
209 | }; | |
210 | ||
4ef67a8c N |
211 | static const struct kernfs_ops sysfs_prealloc_kfops_ro = { |
212 | .read = sysfs_kf_read, | |
213 | .prealloc = true, | |
214 | }; | |
215 | ||
2b75869b N |
216 | static const struct kernfs_ops sysfs_prealloc_kfops_wo = { |
217 | .write = sysfs_kf_write, | |
218 | .prealloc = true, | |
219 | }; | |
220 | ||
221 | static const struct kernfs_ops sysfs_prealloc_kfops_rw = { | |
4ef67a8c | 222 | .read = sysfs_kf_read, |
2b75869b N |
223 | .write = sysfs_kf_write, |
224 | .prealloc = true, | |
225 | }; | |
226 | ||
f6acf8bb TH |
227 | static const struct kernfs_ops sysfs_bin_kfops_ro = { |
228 | .read = sysfs_kf_bin_read, | |
229 | }; | |
230 | ||
231 | static const struct kernfs_ops sysfs_bin_kfops_wo = { | |
232 | .write = sysfs_kf_bin_write, | |
233 | }; | |
234 | ||
235 | static const struct kernfs_ops sysfs_bin_kfops_rw = { | |
236 | .read = sysfs_kf_bin_read, | |
237 | .write = sysfs_kf_bin_write, | |
9b2db6e1 TH |
238 | }; |
239 | ||
240 | static const struct kernfs_ops sysfs_bin_kfops_mmap = { | |
241 | .read = sysfs_kf_bin_read, | |
242 | .write = sysfs_kf_bin_write, | |
f6acf8bb TH |
243 | .mmap = sysfs_kf_bin_mmap, |
244 | }; | |
245 | ||
324a56e1 | 246 | int sysfs_add_file_mode_ns(struct kernfs_node *parent, |
a7dc66df | 247 | const struct attribute *attr, bool is_bin, |
496f7394 | 248 | umode_t mode, const void *ns) |
1da177e4 | 249 | { |
517e64f5 | 250 | struct lock_class_key *key = NULL; |
f6acf8bb | 251 | const struct kernfs_ops *ops; |
324a56e1 | 252 | struct kernfs_node *kn; |
471bd7b7 | 253 | loff_t size; |
1da177e4 | 254 | |
a7dc66df | 255 | if (!is_bin) { |
324a56e1 | 256 | struct kobject *kobj = parent->priv; |
f6acf8bb TH |
257 | const struct sysfs_ops *sysfs_ops = kobj->ktype->sysfs_ops; |
258 | ||
259 | /* every kobject with an attribute needs a ktype assigned */ | |
260 | if (WARN(!sysfs_ops, KERN_ERR | |
261 | "missing sysfs attribute operations for kobject: %s\n", | |
262 | kobject_name(kobj))) | |
263 | return -EINVAL; | |
264 | ||
2b75869b N |
265 | if (sysfs_ops->show && sysfs_ops->store) { |
266 | if (mode & SYSFS_PREALLOC) | |
267 | ops = &sysfs_prealloc_kfops_rw; | |
268 | else | |
269 | ops = &sysfs_file_kfops_rw; | |
4ef67a8c N |
270 | } else if (sysfs_ops->show) { |
271 | if (mode & SYSFS_PREALLOC) | |
272 | ops = &sysfs_prealloc_kfops_ro; | |
273 | else | |
274 | ops = &sysfs_file_kfops_ro; | |
275 | } else if (sysfs_ops->store) { | |
2b75869b N |
276 | if (mode & SYSFS_PREALLOC) |
277 | ops = &sysfs_prealloc_kfops_wo; | |
278 | else | |
279 | ops = &sysfs_file_kfops_wo; | |
280 | } else | |
f6acf8bb | 281 | ops = &sysfs_file_kfops_empty; |
471bd7b7 TH |
282 | |
283 | size = PAGE_SIZE; | |
f6acf8bb TH |
284 | } else { |
285 | struct bin_attribute *battr = (void *)attr; | |
286 | ||
9b2db6e1 TH |
287 | if (battr->mmap) |
288 | ops = &sysfs_bin_kfops_mmap; | |
289 | else if (battr->read && battr->write) | |
f6acf8bb TH |
290 | ops = &sysfs_bin_kfops_rw; |
291 | else if (battr->read) | |
292 | ops = &sysfs_bin_kfops_ro; | |
293 | else if (battr->write) | |
294 | ops = &sysfs_bin_kfops_wo; | |
295 | else | |
296 | ops = &sysfs_file_kfops_empty; | |
471bd7b7 TH |
297 | |
298 | size = battr->size; | |
f6acf8bb TH |
299 | } |
300 | ||
517e64f5 TH |
301 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
302 | if (!attr->ignore_lockdep) | |
303 | key = attr->key ?: (struct lock_class_key *)&attr->skey; | |
304 | #endif | |
2b75869b | 305 | kn = __kernfs_create_file(parent, attr->name, mode & 0777, size, ops, |
dfeb0750 | 306 | (void *)attr, ns, key); |
324a56e1 TH |
307 | if (IS_ERR(kn)) { |
308 | if (PTR_ERR(kn) == -EEXIST) | |
309 | sysfs_warn_dup(parent, attr->name); | |
310 | return PTR_ERR(kn); | |
496f7394 TH |
311 | } |
312 | return 0; | |
313 | } | |
314 | ||
324a56e1 | 315 | int sysfs_add_file(struct kernfs_node *parent, const struct attribute *attr, |
a7dc66df | 316 | bool is_bin) |
0f423895 | 317 | { |
324a56e1 | 318 | return sysfs_add_file_mode_ns(parent, attr, is_bin, attr->mode, NULL); |
0f423895 JB |
319 | } |
320 | ||
1da177e4 | 321 | /** |
58292cbe TH |
322 | * sysfs_create_file_ns - create an attribute file for an object with custom ns |
323 | * @kobj: object we're creating for | |
324 | * @attr: attribute descriptor | |
325 | * @ns: namespace the new file should belong to | |
1da177e4 | 326 | */ |
58292cbe TH |
327 | int sysfs_create_file_ns(struct kobject *kobj, const struct attribute *attr, |
328 | const void *ns) | |
1da177e4 | 329 | { |
608e266a | 330 | BUG_ON(!kobj || !kobj->sd || !attr); |
1da177e4 | 331 | |
a7dc66df | 332 | return sysfs_add_file_mode_ns(kobj->sd, attr, false, attr->mode, ns); |
1da177e4 LT |
333 | |
334 | } | |
58292cbe | 335 | EXPORT_SYMBOL_GPL(sysfs_create_file_ns); |
1da177e4 | 336 | |
1c205ae1 AK |
337 | int sysfs_create_files(struct kobject *kobj, const struct attribute **ptr) |
338 | { | |
339 | int err = 0; | |
340 | int i; | |
341 | ||
342 | for (i = 0; ptr[i] && !err; i++) | |
343 | err = sysfs_create_file(kobj, ptr[i]); | |
344 | if (err) | |
345 | while (--i >= 0) | |
346 | sysfs_remove_file(kobj, ptr[i]); | |
347 | return err; | |
348 | } | |
1b866757 | 349 | EXPORT_SYMBOL_GPL(sysfs_create_files); |
1da177e4 | 350 | |
dfa87c82 AS |
351 | /** |
352 | * sysfs_add_file_to_group - add an attribute file to a pre-existing group. | |
353 | * @kobj: object we're acting for. | |
354 | * @attr: attribute descriptor. | |
355 | * @group: group name. | |
356 | */ | |
357 | int sysfs_add_file_to_group(struct kobject *kobj, | |
358 | const struct attribute *attr, const char *group) | |
359 | { | |
324a56e1 | 360 | struct kernfs_node *parent; |
dfa87c82 AS |
361 | int error; |
362 | ||
ccf73cf3 | 363 | if (group) { |
324a56e1 | 364 | parent = kernfs_find_and_get(kobj->sd, group); |
ccf73cf3 | 365 | } else { |
324a56e1 TH |
366 | parent = kobj->sd; |
367 | kernfs_get(parent); | |
ccf73cf3 | 368 | } |
11f24fbd | 369 | |
324a56e1 | 370 | if (!parent) |
608e266a TH |
371 | return -ENOENT; |
372 | ||
324a56e1 TH |
373 | error = sysfs_add_file(parent, attr, false); |
374 | kernfs_put(parent); | |
608e266a | 375 | |
dfa87c82 AS |
376 | return error; |
377 | } | |
378 | EXPORT_SYMBOL_GPL(sysfs_add_file_to_group); | |
379 | ||
31e5abe9 KS |
380 | /** |
381 | * sysfs_chmod_file - update the modified mode value on an object attribute. | |
382 | * @kobj: object we're acting for. | |
383 | * @attr: attribute descriptor. | |
384 | * @mode: file permissions. | |
385 | * | |
386 | */ | |
49c19400 | 387 | int sysfs_chmod_file(struct kobject *kobj, const struct attribute *attr, |
48176a97 | 388 | umode_t mode) |
31e5abe9 | 389 | { |
324a56e1 | 390 | struct kernfs_node *kn; |
bc062b1b | 391 | struct iattr newattrs; |
51225039 TH |
392 | int rc; |
393 | ||
324a56e1 TH |
394 | kn = kernfs_find_and_get(kobj->sd, attr->name); |
395 | if (!kn) | |
5d60418e | 396 | return -ENOENT; |
f88123ea | 397 | |
adc5e8b5 | 398 | newattrs.ia_mode = (mode & S_IALLUGO) | (kn->mode & ~S_IALLUGO); |
4c6974f5 | 399 | newattrs.ia_valid = ATTR_MODE; |
f88123ea | 400 | |
324a56e1 | 401 | rc = kernfs_setattr(kn, &newattrs); |
5d60418e | 402 | |
324a56e1 | 403 | kernfs_put(kn); |
51225039 | 404 | return rc; |
31e5abe9 KS |
405 | } |
406 | EXPORT_SYMBOL_GPL(sysfs_chmod_file); | |
407 | ||
1da177e4 | 408 | /** |
58292cbe TH |
409 | * sysfs_remove_file_ns - remove an object attribute with a custom ns tag |
410 | * @kobj: object we're acting for | |
411 | * @attr: attribute descriptor | |
412 | * @ns: namespace tag of the file to remove | |
1da177e4 | 413 | * |
58292cbe | 414 | * Hash the attribute name and namespace tag and kill the victim. |
1da177e4 | 415 | */ |
58292cbe TH |
416 | void sysfs_remove_file_ns(struct kobject *kobj, const struct attribute *attr, |
417 | const void *ns) | |
1da177e4 | 418 | { |
324a56e1 | 419 | struct kernfs_node *parent = kobj->sd; |
487505c2 | 420 | |
324a56e1 | 421 | kernfs_remove_by_name_ns(parent, attr->name, ns); |
1da177e4 | 422 | } |
58292cbe | 423 | EXPORT_SYMBOL_GPL(sysfs_remove_file_ns); |
1da177e4 | 424 | |
6b0afc2a TH |
425 | /** |
426 | * sysfs_remove_file_self - remove an object attribute from its own method | |
427 | * @kobj: object we're acting for | |
428 | * @attr: attribute descriptor | |
429 | * | |
430 | * See kernfs_remove_self() for details. | |
431 | */ | |
432 | bool sysfs_remove_file_self(struct kobject *kobj, const struct attribute *attr) | |
433 | { | |
434 | struct kernfs_node *parent = kobj->sd; | |
435 | struct kernfs_node *kn; | |
436 | bool ret; | |
437 | ||
438 | kn = kernfs_find_and_get(parent, attr->name); | |
439 | if (WARN_ON_ONCE(!kn)) | |
440 | return false; | |
441 | ||
442 | ret = kernfs_remove_self(kn); | |
443 | ||
444 | kernfs_put(kn); | |
445 | return ret; | |
446 | } | |
447 | ||
1b18dc2b | 448 | void sysfs_remove_files(struct kobject *kobj, const struct attribute **ptr) |
1c205ae1 AK |
449 | { |
450 | int i; | |
451 | for (i = 0; ptr[i]; i++) | |
452 | sysfs_remove_file(kobj, ptr[i]); | |
453 | } | |
1b866757 | 454 | EXPORT_SYMBOL_GPL(sysfs_remove_files); |
1da177e4 | 455 | |
dfa87c82 AS |
456 | /** |
457 | * sysfs_remove_file_from_group - remove an attribute file from a group. | |
458 | * @kobj: object we're acting for. | |
459 | * @attr: attribute descriptor. | |
460 | * @group: group name. | |
461 | */ | |
462 | void sysfs_remove_file_from_group(struct kobject *kobj, | |
463 | const struct attribute *attr, const char *group) | |
464 | { | |
324a56e1 | 465 | struct kernfs_node *parent; |
dfa87c82 | 466 | |
ccf73cf3 | 467 | if (group) { |
324a56e1 | 468 | parent = kernfs_find_and_get(kobj->sd, group); |
ccf73cf3 | 469 | } else { |
324a56e1 TH |
470 | parent = kobj->sd; |
471 | kernfs_get(parent); | |
ccf73cf3 TH |
472 | } |
473 | ||
324a56e1 TH |
474 | if (parent) { |
475 | kernfs_remove_by_name(parent, attr->name); | |
476 | kernfs_put(parent); | |
dfa87c82 AS |
477 | } |
478 | } | |
479 | EXPORT_SYMBOL_GPL(sysfs_remove_file_from_group); | |
480 | ||
3124eb16 TH |
481 | /** |
482 | * sysfs_create_bin_file - create binary file for object. | |
483 | * @kobj: object. | |
484 | * @attr: attribute descriptor. | |
485 | */ | |
486 | int sysfs_create_bin_file(struct kobject *kobj, | |
487 | const struct bin_attribute *attr) | |
488 | { | |
489 | BUG_ON(!kobj || !kobj->sd || !attr); | |
490 | ||
a7dc66df | 491 | return sysfs_add_file(kobj->sd, &attr->attr, true); |
3124eb16 TH |
492 | } |
493 | EXPORT_SYMBOL_GPL(sysfs_create_bin_file); | |
494 | ||
495 | /** | |
496 | * sysfs_remove_bin_file - remove binary file for object. | |
497 | * @kobj: object. | |
498 | * @attr: attribute descriptor. | |
499 | */ | |
500 | void sysfs_remove_bin_file(struct kobject *kobj, | |
501 | const struct bin_attribute *attr) | |
502 | { | |
879f40d1 | 503 | kernfs_remove_by_name(kobj->sd, attr->attr.name); |
3124eb16 TH |
504 | } |
505 | EXPORT_SYMBOL_GPL(sysfs_remove_bin_file); |