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Commit | Line | Data |
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b8441ed2 TH |
1 | /* |
2 | * kernfs.h - pseudo filesystem decoupled from vfs locking | |
3 | * | |
4 | * This file is released under the GPLv2. | |
5 | */ | |
6 | ||
7 | #ifndef __LINUX_KERNFS_H | |
8 | #define __LINUX_KERNFS_H | |
9 | ||
879f40d1 | 10 | #include <linux/kernel.h> |
5d0e26bb | 11 | #include <linux/err.h> |
dd8a5b03 TH |
12 | #include <linux/list.h> |
13 | #include <linux/mutex.h> | |
bc755553 | 14 | #include <linux/idr.h> |
517e64f5 | 15 | #include <linux/lockdep.h> |
cf9e5a73 TH |
16 | #include <linux/rbtree.h> |
17 | #include <linux/atomic.h> | |
abd54f02 | 18 | #include <linux/wait.h> |
879f40d1 | 19 | |
5d60418e | 20 | struct file; |
917f56ca | 21 | struct dentry; |
5d60418e | 22 | struct iattr; |
dd8a5b03 TH |
23 | struct seq_file; |
24 | struct vm_area_struct; | |
4b93dc9b TH |
25 | struct super_block; |
26 | struct file_system_type; | |
5d60418e | 27 | |
c525aadd TH |
28 | struct kernfs_open_node; |
29 | struct kernfs_iattrs; | |
cf9e5a73 TH |
30 | |
31 | enum kernfs_node_type { | |
df23fc39 TH |
32 | KERNFS_DIR = 0x0001, |
33 | KERNFS_FILE = 0x0002, | |
34 | KERNFS_LINK = 0x0004, | |
cf9e5a73 TH |
35 | }; |
36 | ||
df23fc39 | 37 | #define KERNFS_TYPE_MASK 0x000f |
df23fc39 | 38 | #define KERNFS_FLAG_MASK ~KERNFS_TYPE_MASK |
cf9e5a73 TH |
39 | |
40 | enum kernfs_node_flag { | |
d35258ef | 41 | KERNFS_ACTIVATED = 0x0010, |
df23fc39 TH |
42 | KERNFS_NS = 0x0020, |
43 | KERNFS_HAS_SEQ_SHOW = 0x0040, | |
44 | KERNFS_HAS_MMAP = 0x0080, | |
45 | KERNFS_LOCKDEP = 0x0100, | |
2063d608 | 46 | KERNFS_STATIC_NAME = 0x0200, |
6b0afc2a TH |
47 | KERNFS_SUICIDAL = 0x0400, |
48 | KERNFS_SUICIDED = 0x0800, | |
cf9e5a73 TH |
49 | }; |
50 | ||
d35258ef TH |
51 | /* @flags for kernfs_create_root() */ |
52 | enum kernfs_root_flag { | |
555724a8 TH |
53 | /* |
54 | * kernfs_nodes are created in the deactivated state and invisible. | |
55 | * They require explicit kernfs_activate() to become visible. This | |
56 | * can be used to make related nodes become visible atomically | |
57 | * after all nodes are created successfully. | |
58 | */ | |
59 | KERNFS_ROOT_CREATE_DEACTIVATED = 0x0001, | |
60 | ||
61 | /* | |
62 | * For regular flies, if the opener has CAP_DAC_OVERRIDE, open(2) | |
63 | * succeeds regardless of the RW permissions. sysfs had an extra | |
64 | * layer of enforcement where open(2) fails with -EACCES regardless | |
65 | * of CAP_DAC_OVERRIDE if the permission doesn't have the | |
66 | * respective read or write access at all (none of S_IRUGO or | |
67 | * S_IWUGO) or the respective operation isn't implemented. The | |
68 | * following flag enables that behavior. | |
69 | */ | |
70 | KERNFS_ROOT_EXTRA_OPEN_PERM_CHECK = 0x0002, | |
d35258ef TH |
71 | }; |
72 | ||
324a56e1 TH |
73 | /* type-specific structures for kernfs_node union members */ |
74 | struct kernfs_elem_dir { | |
cf9e5a73 | 75 | unsigned long subdirs; |
adc5e8b5 | 76 | /* children rbtree starts here and goes through kn->rb */ |
cf9e5a73 TH |
77 | struct rb_root children; |
78 | ||
79 | /* | |
80 | * The kernfs hierarchy this directory belongs to. This fits | |
324a56e1 | 81 | * better directly in kernfs_node but is here to save space. |
cf9e5a73 TH |
82 | */ |
83 | struct kernfs_root *root; | |
84 | }; | |
85 | ||
324a56e1 TH |
86 | struct kernfs_elem_symlink { |
87 | struct kernfs_node *target_kn; | |
cf9e5a73 TH |
88 | }; |
89 | ||
324a56e1 | 90 | struct kernfs_elem_attr { |
cf9e5a73 | 91 | const struct kernfs_ops *ops; |
c525aadd | 92 | struct kernfs_open_node *open; |
cf9e5a73 TH |
93 | loff_t size; |
94 | }; | |
95 | ||
96 | /* | |
324a56e1 TH |
97 | * kernfs_node - the building block of kernfs hierarchy. Each and every |
98 | * kernfs node is represented by single kernfs_node. Most fields are | |
cf9e5a73 TH |
99 | * private to kernfs and shouldn't be accessed directly by kernfs users. |
100 | * | |
324a56e1 TH |
101 | * As long as s_count reference is held, the kernfs_node itself is |
102 | * accessible. Dereferencing elem or any other outer entity requires | |
103 | * active reference. | |
cf9e5a73 | 104 | */ |
324a56e1 | 105 | struct kernfs_node { |
adc5e8b5 TH |
106 | atomic_t count; |
107 | atomic_t active; | |
cf9e5a73 TH |
108 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
109 | struct lockdep_map dep_map; | |
110 | #endif | |
3eef34ad TH |
111 | /* |
112 | * Use kernfs_get_parent() and kernfs_name/path() instead of | |
113 | * accessing the following two fields directly. If the node is | |
114 | * never moved to a different parent, it is safe to access the | |
115 | * parent directly. | |
116 | */ | |
adc5e8b5 TH |
117 | struct kernfs_node *parent; |
118 | const char *name; | |
cf9e5a73 | 119 | |
adc5e8b5 | 120 | struct rb_node rb; |
cf9e5a73 | 121 | |
adc5e8b5 | 122 | const void *ns; /* namespace tag */ |
9b0925a6 | 123 | unsigned int hash; /* ns + name hash */ |
cf9e5a73 | 124 | union { |
adc5e8b5 TH |
125 | struct kernfs_elem_dir dir; |
126 | struct kernfs_elem_symlink symlink; | |
127 | struct kernfs_elem_attr attr; | |
cf9e5a73 TH |
128 | }; |
129 | ||
130 | void *priv; | |
131 | ||
adc5e8b5 TH |
132 | unsigned short flags; |
133 | umode_t mode; | |
134 | unsigned int ino; | |
c525aadd | 135 | struct kernfs_iattrs *iattr; |
cf9e5a73 | 136 | }; |
b8441ed2 | 137 | |
80b9bbef | 138 | /* |
90c07c89 TH |
139 | * kernfs_syscall_ops may be specified on kernfs_create_root() to support |
140 | * syscalls. These optional callbacks are invoked on the matching syscalls | |
141 | * and can perform any kernfs operations which don't necessarily have to be | |
142 | * the exact operation requested. An active reference is held for each | |
143 | * kernfs_node parameter. | |
80b9bbef | 144 | */ |
90c07c89 | 145 | struct kernfs_syscall_ops { |
6a7fed4e TH |
146 | int (*remount_fs)(struct kernfs_root *root, int *flags, char *data); |
147 | int (*show_options)(struct seq_file *sf, struct kernfs_root *root); | |
148 | ||
80b9bbef TH |
149 | int (*mkdir)(struct kernfs_node *parent, const char *name, |
150 | umode_t mode); | |
151 | int (*rmdir)(struct kernfs_node *kn); | |
152 | int (*rename)(struct kernfs_node *kn, struct kernfs_node *new_parent, | |
153 | const char *new_name); | |
154 | }; | |
155 | ||
ba7443bc TH |
156 | struct kernfs_root { |
157 | /* published fields */ | |
324a56e1 | 158 | struct kernfs_node *kn; |
d35258ef | 159 | unsigned int flags; /* KERNFS_ROOT_* flags */ |
bc755553 TH |
160 | |
161 | /* private fields, do not use outside kernfs proper */ | |
162 | struct ida ino_ida; | |
90c07c89 | 163 | struct kernfs_syscall_ops *syscall_ops; |
7d568a83 TH |
164 | |
165 | /* list of kernfs_super_info of this root, protected by kernfs_mutex */ | |
166 | struct list_head supers; | |
167 | ||
abd54f02 | 168 | wait_queue_head_t deactivate_waitq; |
ba7443bc TH |
169 | }; |
170 | ||
c525aadd | 171 | struct kernfs_open_file { |
dd8a5b03 | 172 | /* published fields */ |
324a56e1 | 173 | struct kernfs_node *kn; |
dd8a5b03 | 174 | struct file *file; |
2536390d | 175 | void *priv; |
dd8a5b03 TH |
176 | |
177 | /* private fields, do not use outside kernfs proper */ | |
178 | struct mutex mutex; | |
179 | int event; | |
180 | struct list_head list; | |
181 | ||
b7ce40cf | 182 | size_t atomic_write_len; |
dd8a5b03 TH |
183 | bool mmapped; |
184 | const struct vm_operations_struct *vm_ops; | |
185 | }; | |
186 | ||
f6acf8bb TH |
187 | struct kernfs_ops { |
188 | /* | |
189 | * Read is handled by either seq_file or raw_read(). | |
190 | * | |
d19b9846 TH |
191 | * If seq_show() is present, seq_file path is active. Other seq |
192 | * operations are optional and if not implemented, the behavior is | |
193 | * equivalent to single_open(). @sf->private points to the | |
c525aadd | 194 | * associated kernfs_open_file. |
f6acf8bb TH |
195 | * |
196 | * read() is bounced through kernel buffer and a read larger than | |
197 | * PAGE_SIZE results in partial operation of PAGE_SIZE. | |
198 | */ | |
199 | int (*seq_show)(struct seq_file *sf, void *v); | |
d19b9846 TH |
200 | |
201 | void *(*seq_start)(struct seq_file *sf, loff_t *ppos); | |
202 | void *(*seq_next)(struct seq_file *sf, void *v, loff_t *ppos); | |
203 | void (*seq_stop)(struct seq_file *sf, void *v); | |
f6acf8bb | 204 | |
c525aadd | 205 | ssize_t (*read)(struct kernfs_open_file *of, char *buf, size_t bytes, |
f6acf8bb TH |
206 | loff_t off); |
207 | ||
208 | /* | |
4d3773c4 TH |
209 | * write() is bounced through kernel buffer. If atomic_write_len |
210 | * is not set, a write larger than PAGE_SIZE results in partial | |
211 | * operations of PAGE_SIZE chunks. If atomic_write_len is set, | |
212 | * writes upto the specified size are executed atomically but | |
213 | * larger ones are rejected with -E2BIG. | |
f6acf8bb | 214 | */ |
4d3773c4 | 215 | size_t atomic_write_len; |
c525aadd | 216 | ssize_t (*write)(struct kernfs_open_file *of, char *buf, size_t bytes, |
f6acf8bb TH |
217 | loff_t off); |
218 | ||
c525aadd | 219 | int (*mmap)(struct kernfs_open_file *of, struct vm_area_struct *vma); |
517e64f5 TH |
220 | |
221 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | |
222 | struct lock_class_key lockdep_key; | |
223 | #endif | |
f6acf8bb TH |
224 | }; |
225 | ||
ba341d55 | 226 | #ifdef CONFIG_KERNFS |
879f40d1 | 227 | |
df23fc39 | 228 | static inline enum kernfs_node_type kernfs_type(struct kernfs_node *kn) |
cf9e5a73 | 229 | { |
df23fc39 | 230 | return kn->flags & KERNFS_TYPE_MASK; |
cf9e5a73 TH |
231 | } |
232 | ||
233 | /** | |
234 | * kernfs_enable_ns - enable namespace under a directory | |
324a56e1 | 235 | * @kn: directory of interest, should be empty |
cf9e5a73 | 236 | * |
324a56e1 TH |
237 | * This is to be called right after @kn is created to enable namespace |
238 | * under it. All children of @kn must have non-NULL namespace tags and | |
cf9e5a73 TH |
239 | * only the ones which match the super_block's tag will be visible. |
240 | */ | |
324a56e1 | 241 | static inline void kernfs_enable_ns(struct kernfs_node *kn) |
cf9e5a73 | 242 | { |
df23fc39 | 243 | WARN_ON_ONCE(kernfs_type(kn) != KERNFS_DIR); |
adc5e8b5 | 244 | WARN_ON_ONCE(!RB_EMPTY_ROOT(&kn->dir.children)); |
df23fc39 | 245 | kn->flags |= KERNFS_NS; |
cf9e5a73 TH |
246 | } |
247 | ||
ac9bba03 TH |
248 | /** |
249 | * kernfs_ns_enabled - test whether namespace is enabled | |
324a56e1 | 250 | * @kn: the node to test |
ac9bba03 TH |
251 | * |
252 | * Test whether namespace filtering is enabled for the children of @ns. | |
253 | */ | |
324a56e1 | 254 | static inline bool kernfs_ns_enabled(struct kernfs_node *kn) |
ac9bba03 | 255 | { |
df23fc39 | 256 | return kn->flags & KERNFS_NS; |
ac9bba03 TH |
257 | } |
258 | ||
3eef34ad TH |
259 | int kernfs_name(struct kernfs_node *kn, char *buf, size_t buflen); |
260 | char * __must_check kernfs_path(struct kernfs_node *kn, char *buf, | |
261 | size_t buflen); | |
262 | void pr_cont_kernfs_name(struct kernfs_node *kn); | |
263 | void pr_cont_kernfs_path(struct kernfs_node *kn); | |
264 | struct kernfs_node *kernfs_get_parent(struct kernfs_node *kn); | |
324a56e1 TH |
265 | struct kernfs_node *kernfs_find_and_get_ns(struct kernfs_node *parent, |
266 | const char *name, const void *ns); | |
267 | void kernfs_get(struct kernfs_node *kn); | |
268 | void kernfs_put(struct kernfs_node *kn); | |
ccf73cf3 | 269 | |
0c23b225 TH |
270 | struct kernfs_node *kernfs_node_from_dentry(struct dentry *dentry); |
271 | struct kernfs_root *kernfs_root_from_sb(struct super_block *sb); | |
272 | ||
90c07c89 | 273 | struct kernfs_root *kernfs_create_root(struct kernfs_syscall_ops *scops, |
d35258ef | 274 | unsigned int flags, void *priv); |
ba7443bc TH |
275 | void kernfs_destroy_root(struct kernfs_root *root); |
276 | ||
324a56e1 | 277 | struct kernfs_node *kernfs_create_dir_ns(struct kernfs_node *parent, |
bb8b9d09 TH |
278 | const char *name, umode_t mode, |
279 | void *priv, const void *ns); | |
2063d608 TH |
280 | struct kernfs_node *__kernfs_create_file(struct kernfs_node *parent, |
281 | const char *name, | |
282 | umode_t mode, loff_t size, | |
283 | const struct kernfs_ops *ops, | |
284 | void *priv, const void *ns, | |
285 | bool name_is_static, | |
286 | struct lock_class_key *key); | |
324a56e1 TH |
287 | struct kernfs_node *kernfs_create_link(struct kernfs_node *parent, |
288 | const char *name, | |
289 | struct kernfs_node *target); | |
d35258ef | 290 | void kernfs_activate(struct kernfs_node *kn); |
324a56e1 | 291 | void kernfs_remove(struct kernfs_node *kn); |
6b0afc2a TH |
292 | void kernfs_break_active_protection(struct kernfs_node *kn); |
293 | void kernfs_unbreak_active_protection(struct kernfs_node *kn); | |
294 | bool kernfs_remove_self(struct kernfs_node *kn); | |
324a56e1 | 295 | int kernfs_remove_by_name_ns(struct kernfs_node *parent, const char *name, |
879f40d1 | 296 | const void *ns); |
324a56e1 | 297 | int kernfs_rename_ns(struct kernfs_node *kn, struct kernfs_node *new_parent, |
890ece16 | 298 | const char *new_name, const void *new_ns); |
324a56e1 TH |
299 | int kernfs_setattr(struct kernfs_node *kn, const struct iattr *iattr); |
300 | void kernfs_notify(struct kernfs_node *kn); | |
879f40d1 | 301 | |
4b93dc9b TH |
302 | const void *kernfs_super_ns(struct super_block *sb); |
303 | struct dentry *kernfs_mount_ns(struct file_system_type *fs_type, int flags, | |
26fc9cd2 JZ |
304 | struct kernfs_root *root, unsigned long magic, |
305 | bool *new_sb_created, const void *ns); | |
4b93dc9b TH |
306 | void kernfs_kill_sb(struct super_block *sb); |
307 | ||
308 | void kernfs_init(void); | |
309 | ||
ba341d55 | 310 | #else /* CONFIG_KERNFS */ |
879f40d1 | 311 | |
df23fc39 | 312 | static inline enum kernfs_node_type kernfs_type(struct kernfs_node *kn) |
cf9e5a73 TH |
313 | { return 0; } /* whatever */ |
314 | ||
324a56e1 | 315 | static inline void kernfs_enable_ns(struct kernfs_node *kn) { } |
cf9e5a73 | 316 | |
324a56e1 | 317 | static inline bool kernfs_ns_enabled(struct kernfs_node *kn) |
ac9bba03 TH |
318 | { return false; } |
319 | ||
3eef34ad TH |
320 | static inline int kernfs_name(struct kernfs_node *kn, char *buf, size_t buflen) |
321 | { return -ENOSYS; } | |
322 | ||
323 | static inline char * __must_check kernfs_path(struct kernfs_node *kn, char *buf, | |
324 | size_t buflen) | |
325 | { return NULL; } | |
326 | ||
327 | static inline void pr_cont_kernfs_name(struct kernfs_node *kn) { } | |
328 | static inline void pr_cont_kernfs_path(struct kernfs_node *kn) { } | |
329 | ||
330 | static inline struct kernfs_node *kernfs_get_parent(struct kernfs_node *kn) | |
331 | { return NULL; } | |
332 | ||
324a56e1 TH |
333 | static inline struct kernfs_node * |
334 | kernfs_find_and_get_ns(struct kernfs_node *parent, const char *name, | |
ccf73cf3 TH |
335 | const void *ns) |
336 | { return NULL; } | |
337 | ||
324a56e1 TH |
338 | static inline void kernfs_get(struct kernfs_node *kn) { } |
339 | static inline void kernfs_put(struct kernfs_node *kn) { } | |
ccf73cf3 | 340 | |
0c23b225 TH |
341 | static inline struct kernfs_node *kernfs_node_from_dentry(struct dentry *dentry) |
342 | { return NULL; } | |
343 | ||
344 | static inline struct kernfs_root *kernfs_root_from_sb(struct super_block *sb) | |
345 | { return NULL; } | |
346 | ||
80b9bbef | 347 | static inline struct kernfs_root * |
d35258ef TH |
348 | kernfs_create_root(struct kernfs_syscall_ops *scops, unsigned int flags, |
349 | void *priv) | |
ba7443bc TH |
350 | { return ERR_PTR(-ENOSYS); } |
351 | ||
352 | static inline void kernfs_destroy_root(struct kernfs_root *root) { } | |
353 | ||
324a56e1 | 354 | static inline struct kernfs_node * |
bb8b9d09 TH |
355 | kernfs_create_dir_ns(struct kernfs_node *parent, const char *name, |
356 | umode_t mode, void *priv, const void *ns) | |
93b2b8e4 TH |
357 | { return ERR_PTR(-ENOSYS); } |
358 | ||
324a56e1 | 359 | static inline struct kernfs_node * |
2063d608 TH |
360 | __kernfs_create_file(struct kernfs_node *parent, const char *name, |
361 | umode_t mode, loff_t size, const struct kernfs_ops *ops, | |
362 | void *priv, const void *ns, bool name_is_static, | |
363 | struct lock_class_key *key) | |
496f7394 TH |
364 | { return ERR_PTR(-ENOSYS); } |
365 | ||
324a56e1 TH |
366 | static inline struct kernfs_node * |
367 | kernfs_create_link(struct kernfs_node *parent, const char *name, | |
368 | struct kernfs_node *target) | |
5d0e26bb TH |
369 | { return ERR_PTR(-ENOSYS); } |
370 | ||
d35258ef TH |
371 | static inline void kernfs_activate(struct kernfs_node *kn) { } |
372 | ||
324a56e1 | 373 | static inline void kernfs_remove(struct kernfs_node *kn) { } |
879f40d1 | 374 | |
6b0afc2a TH |
375 | static inline bool kernfs_remove_self(struct kernfs_node *kn) |
376 | { return false; } | |
377 | ||
324a56e1 | 378 | static inline int kernfs_remove_by_name_ns(struct kernfs_node *kn, |
879f40d1 TH |
379 | const char *name, const void *ns) |
380 | { return -ENOSYS; } | |
381 | ||
324a56e1 TH |
382 | static inline int kernfs_rename_ns(struct kernfs_node *kn, |
383 | struct kernfs_node *new_parent, | |
890ece16 TH |
384 | const char *new_name, const void *new_ns) |
385 | { return -ENOSYS; } | |
386 | ||
324a56e1 | 387 | static inline int kernfs_setattr(struct kernfs_node *kn, |
5d60418e TH |
388 | const struct iattr *iattr) |
389 | { return -ENOSYS; } | |
390 | ||
324a56e1 | 391 | static inline void kernfs_notify(struct kernfs_node *kn) { } |
024f6471 | 392 | |
4b93dc9b TH |
393 | static inline const void *kernfs_super_ns(struct super_block *sb) |
394 | { return NULL; } | |
395 | ||
396 | static inline struct dentry * | |
397 | kernfs_mount_ns(struct file_system_type *fs_type, int flags, | |
26fc9cd2 JZ |
398 | struct kernfs_root *root, unsigned long magic, |
399 | bool *new_sb_created, const void *ns) | |
4b93dc9b TH |
400 | { return ERR_PTR(-ENOSYS); } |
401 | ||
402 | static inline void kernfs_kill_sb(struct super_block *sb) { } | |
403 | ||
404 | static inline void kernfs_init(void) { } | |
405 | ||
ba341d55 | 406 | #endif /* CONFIG_KERNFS */ |
879f40d1 | 407 | |
324a56e1 TH |
408 | static inline struct kernfs_node * |
409 | kernfs_find_and_get(struct kernfs_node *kn, const char *name) | |
ccf73cf3 | 410 | { |
324a56e1 | 411 | return kernfs_find_and_get_ns(kn, name, NULL); |
ccf73cf3 TH |
412 | } |
413 | ||
324a56e1 | 414 | static inline struct kernfs_node * |
bb8b9d09 TH |
415 | kernfs_create_dir(struct kernfs_node *parent, const char *name, umode_t mode, |
416 | void *priv) | |
93b2b8e4 | 417 | { |
bb8b9d09 | 418 | return kernfs_create_dir_ns(parent, name, mode, priv, NULL); |
93b2b8e4 TH |
419 | } |
420 | ||
324a56e1 TH |
421 | static inline struct kernfs_node * |
422 | kernfs_create_file_ns(struct kernfs_node *parent, const char *name, | |
517e64f5 TH |
423 | umode_t mode, loff_t size, const struct kernfs_ops *ops, |
424 | void *priv, const void *ns) | |
425 | { | |
426 | struct lock_class_key *key = NULL; | |
427 | ||
428 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | |
429 | key = (struct lock_class_key *)&ops->lockdep_key; | |
430 | #endif | |
2063d608 TH |
431 | return __kernfs_create_file(parent, name, mode, size, ops, priv, ns, |
432 | false, key); | |
517e64f5 TH |
433 | } |
434 | ||
324a56e1 TH |
435 | static inline struct kernfs_node * |
436 | kernfs_create_file(struct kernfs_node *parent, const char *name, umode_t mode, | |
496f7394 TH |
437 | loff_t size, const struct kernfs_ops *ops, void *priv) |
438 | { | |
439 | return kernfs_create_file_ns(parent, name, mode, size, ops, priv, NULL); | |
440 | } | |
441 | ||
324a56e1 | 442 | static inline int kernfs_remove_by_name(struct kernfs_node *parent, |
879f40d1 TH |
443 | const char *name) |
444 | { | |
445 | return kernfs_remove_by_name_ns(parent, name, NULL); | |
446 | } | |
447 | ||
0c23b225 TH |
448 | static inline int kernfs_rename(struct kernfs_node *kn, |
449 | struct kernfs_node *new_parent, | |
450 | const char *new_name) | |
451 | { | |
452 | return kernfs_rename_ns(kn, new_parent, new_name, NULL); | |
453 | } | |
454 | ||
4b93dc9b TH |
455 | static inline struct dentry * |
456 | kernfs_mount(struct file_system_type *fs_type, int flags, | |
26fc9cd2 JZ |
457 | struct kernfs_root *root, unsigned long magic, |
458 | bool *new_sb_created) | |
4b93dc9b | 459 | { |
26fc9cd2 JZ |
460 | return kernfs_mount_ns(fs_type, flags, root, |
461 | magic, new_sb_created, NULL); | |
4b93dc9b TH |
462 | } |
463 | ||
b8441ed2 | 464 | #endif /* __LINUX_KERNFS_H */ |