Commit | Line | Data |
---|---|---|
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, | |
6b0afc2a TH |
46 | KERNFS_SUICIDAL = 0x0400, |
47 | KERNFS_SUICIDED = 0x0800, | |
ea015218 | 48 | KERNFS_EMPTY_DIR = 0x1000, |
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 | 93 | loff_t size; |
ecca47ce | 94 | struct kernfs_node *notify_next; /* for kernfs_notify() */ |
cf9e5a73 TH |
95 | }; |
96 | ||
97 | /* | |
324a56e1 TH |
98 | * kernfs_node - the building block of kernfs hierarchy. Each and every |
99 | * kernfs node is represented by single kernfs_node. Most fields are | |
cf9e5a73 TH |
100 | * private to kernfs and shouldn't be accessed directly by kernfs users. |
101 | * | |
324a56e1 TH |
102 | * As long as s_count reference is held, the kernfs_node itself is |
103 | * accessible. Dereferencing elem or any other outer entity requires | |
104 | * active reference. | |
cf9e5a73 | 105 | */ |
324a56e1 | 106 | struct kernfs_node { |
adc5e8b5 TH |
107 | atomic_t count; |
108 | atomic_t active; | |
cf9e5a73 TH |
109 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
110 | struct lockdep_map dep_map; | |
111 | #endif | |
3eef34ad TH |
112 | /* |
113 | * Use kernfs_get_parent() and kernfs_name/path() instead of | |
114 | * accessing the following two fields directly. If the node is | |
115 | * never moved to a different parent, it is safe to access the | |
116 | * parent directly. | |
117 | */ | |
adc5e8b5 TH |
118 | struct kernfs_node *parent; |
119 | const char *name; | |
cf9e5a73 | 120 | |
adc5e8b5 | 121 | struct rb_node rb; |
cf9e5a73 | 122 | |
adc5e8b5 | 123 | const void *ns; /* namespace tag */ |
9b0925a6 | 124 | unsigned int hash; /* ns + name hash */ |
cf9e5a73 | 125 | union { |
adc5e8b5 TH |
126 | struct kernfs_elem_dir dir; |
127 | struct kernfs_elem_symlink symlink; | |
128 | struct kernfs_elem_attr attr; | |
cf9e5a73 TH |
129 | }; |
130 | ||
131 | void *priv; | |
132 | ||
adc5e8b5 TH |
133 | unsigned short flags; |
134 | umode_t mode; | |
135 | unsigned int ino; | |
c525aadd | 136 | struct kernfs_iattrs *iattr; |
cf9e5a73 | 137 | }; |
b8441ed2 | 138 | |
80b9bbef | 139 | /* |
90c07c89 TH |
140 | * kernfs_syscall_ops may be specified on kernfs_create_root() to support |
141 | * syscalls. These optional callbacks are invoked on the matching syscalls | |
142 | * and can perform any kernfs operations which don't necessarily have to be | |
143 | * the exact operation requested. An active reference is held for each | |
144 | * kernfs_node parameter. | |
80b9bbef | 145 | */ |
90c07c89 | 146 | struct kernfs_syscall_ops { |
6a7fed4e TH |
147 | int (*remount_fs)(struct kernfs_root *root, int *flags, char *data); |
148 | int (*show_options)(struct seq_file *sf, struct kernfs_root *root); | |
149 | ||
80b9bbef TH |
150 | int (*mkdir)(struct kernfs_node *parent, const char *name, |
151 | umode_t mode); | |
152 | int (*rmdir)(struct kernfs_node *kn); | |
153 | int (*rename)(struct kernfs_node *kn, struct kernfs_node *new_parent, | |
154 | const char *new_name); | |
4f41fc59 SH |
155 | int (*show_path)(struct seq_file *sf, struct kernfs_node *kn, |
156 | struct kernfs_root *root); | |
80b9bbef TH |
157 | }; |
158 | ||
ba7443bc TH |
159 | struct kernfs_root { |
160 | /* published fields */ | |
324a56e1 | 161 | struct kernfs_node *kn; |
d35258ef | 162 | unsigned int flags; /* KERNFS_ROOT_* flags */ |
bc755553 TH |
163 | |
164 | /* private fields, do not use outside kernfs proper */ | |
165 | struct ida ino_ida; | |
90c07c89 | 166 | struct kernfs_syscall_ops *syscall_ops; |
7d568a83 TH |
167 | |
168 | /* list of kernfs_super_info of this root, protected by kernfs_mutex */ | |
169 | struct list_head supers; | |
170 | ||
abd54f02 | 171 | wait_queue_head_t deactivate_waitq; |
ba7443bc TH |
172 | }; |
173 | ||
c525aadd | 174 | struct kernfs_open_file { |
dd8a5b03 | 175 | /* published fields */ |
324a56e1 | 176 | struct kernfs_node *kn; |
dd8a5b03 | 177 | struct file *file; |
2536390d | 178 | void *priv; |
dd8a5b03 TH |
179 | |
180 | /* private fields, do not use outside kernfs proper */ | |
181 | struct mutex mutex; | |
182 | int event; | |
183 | struct list_head list; | |
2b75869b | 184 | char *prealloc_buf; |
dd8a5b03 | 185 | |
b7ce40cf | 186 | size_t atomic_write_len; |
dd8a5b03 TH |
187 | bool mmapped; |
188 | const struct vm_operations_struct *vm_ops; | |
189 | }; | |
190 | ||
f6acf8bb TH |
191 | struct kernfs_ops { |
192 | /* | |
193 | * Read is handled by either seq_file or raw_read(). | |
194 | * | |
d19b9846 TH |
195 | * If seq_show() is present, seq_file path is active. Other seq |
196 | * operations are optional and if not implemented, the behavior is | |
197 | * equivalent to single_open(). @sf->private points to the | |
c525aadd | 198 | * associated kernfs_open_file. |
f6acf8bb TH |
199 | * |
200 | * read() is bounced through kernel buffer and a read larger than | |
201 | * PAGE_SIZE results in partial operation of PAGE_SIZE. | |
202 | */ | |
203 | int (*seq_show)(struct seq_file *sf, void *v); | |
d19b9846 TH |
204 | |
205 | void *(*seq_start)(struct seq_file *sf, loff_t *ppos); | |
206 | void *(*seq_next)(struct seq_file *sf, void *v, loff_t *ppos); | |
207 | void (*seq_stop)(struct seq_file *sf, void *v); | |
f6acf8bb | 208 | |
c525aadd | 209 | ssize_t (*read)(struct kernfs_open_file *of, char *buf, size_t bytes, |
f6acf8bb TH |
210 | loff_t off); |
211 | ||
212 | /* | |
4d3773c4 TH |
213 | * write() is bounced through kernel buffer. If atomic_write_len |
214 | * is not set, a write larger than PAGE_SIZE results in partial | |
215 | * operations of PAGE_SIZE chunks. If atomic_write_len is set, | |
216 | * writes upto the specified size are executed atomically but | |
217 | * larger ones are rejected with -E2BIG. | |
f6acf8bb | 218 | */ |
4d3773c4 | 219 | size_t atomic_write_len; |
2b75869b N |
220 | /* |
221 | * "prealloc" causes a buffer to be allocated at open for | |
222 | * all read/write requests. As ->seq_show uses seq_read() | |
223 | * which does its own allocation, it is incompatible with | |
224 | * ->prealloc. Provide ->read and ->write with ->prealloc. | |
225 | */ | |
226 | bool prealloc; | |
c525aadd | 227 | ssize_t (*write)(struct kernfs_open_file *of, char *buf, size_t bytes, |
f6acf8bb TH |
228 | loff_t off); |
229 | ||
c525aadd | 230 | int (*mmap)(struct kernfs_open_file *of, struct vm_area_struct *vma); |
517e64f5 TH |
231 | |
232 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | |
233 | struct lock_class_key lockdep_key; | |
234 | #endif | |
f6acf8bb TH |
235 | }; |
236 | ||
ba341d55 | 237 | #ifdef CONFIG_KERNFS |
879f40d1 | 238 | |
df23fc39 | 239 | static inline enum kernfs_node_type kernfs_type(struct kernfs_node *kn) |
cf9e5a73 | 240 | { |
df23fc39 | 241 | return kn->flags & KERNFS_TYPE_MASK; |
cf9e5a73 TH |
242 | } |
243 | ||
244 | /** | |
245 | * kernfs_enable_ns - enable namespace under a directory | |
324a56e1 | 246 | * @kn: directory of interest, should be empty |
cf9e5a73 | 247 | * |
324a56e1 TH |
248 | * This is to be called right after @kn is created to enable namespace |
249 | * under it. All children of @kn must have non-NULL namespace tags and | |
cf9e5a73 TH |
250 | * only the ones which match the super_block's tag will be visible. |
251 | */ | |
324a56e1 | 252 | static inline void kernfs_enable_ns(struct kernfs_node *kn) |
cf9e5a73 | 253 | { |
df23fc39 | 254 | WARN_ON_ONCE(kernfs_type(kn) != KERNFS_DIR); |
adc5e8b5 | 255 | WARN_ON_ONCE(!RB_EMPTY_ROOT(&kn->dir.children)); |
df23fc39 | 256 | kn->flags |= KERNFS_NS; |
cf9e5a73 TH |
257 | } |
258 | ||
ac9bba03 TH |
259 | /** |
260 | * kernfs_ns_enabled - test whether namespace is enabled | |
324a56e1 | 261 | * @kn: the node to test |
ac9bba03 TH |
262 | * |
263 | * Test whether namespace filtering is enabled for the children of @ns. | |
264 | */ | |
324a56e1 | 265 | static inline bool kernfs_ns_enabled(struct kernfs_node *kn) |
ac9bba03 | 266 | { |
df23fc39 | 267 | return kn->flags & KERNFS_NS; |
ac9bba03 TH |
268 | } |
269 | ||
3eef34ad | 270 | int kernfs_name(struct kernfs_node *kn, char *buf, size_t buflen); |
9acee9c5 | 271 | size_t kernfs_path_len(struct kernfs_node *kn); |
9f6df573 AK |
272 | int kernfs_path_from_node(struct kernfs_node *root_kn, struct kernfs_node *kn, |
273 | char *buf, size_t buflen); | |
274 | char *kernfs_path(struct kernfs_node *kn, char *buf, size_t buflen); | |
3eef34ad TH |
275 | void pr_cont_kernfs_name(struct kernfs_node *kn); |
276 | void pr_cont_kernfs_path(struct kernfs_node *kn); | |
277 | struct kernfs_node *kernfs_get_parent(struct kernfs_node *kn); | |
324a56e1 TH |
278 | struct kernfs_node *kernfs_find_and_get_ns(struct kernfs_node *parent, |
279 | const char *name, const void *ns); | |
bd96f76a TH |
280 | struct kernfs_node *kernfs_walk_and_get_ns(struct kernfs_node *parent, |
281 | const char *path, const void *ns); | |
324a56e1 TH |
282 | void kernfs_get(struct kernfs_node *kn); |
283 | void kernfs_put(struct kernfs_node *kn); | |
ccf73cf3 | 284 | |
0c23b225 TH |
285 | struct kernfs_node *kernfs_node_from_dentry(struct dentry *dentry); |
286 | struct kernfs_root *kernfs_root_from_sb(struct super_block *sb); | |
fb02915f | 287 | struct inode *kernfs_get_inode(struct super_block *sb, struct kernfs_node *kn); |
0c23b225 | 288 | |
fb3c8315 AK |
289 | struct dentry *kernfs_node_dentry(struct kernfs_node *kn, |
290 | struct super_block *sb); | |
90c07c89 | 291 | struct kernfs_root *kernfs_create_root(struct kernfs_syscall_ops *scops, |
d35258ef | 292 | unsigned int flags, void *priv); |
ba7443bc TH |
293 | void kernfs_destroy_root(struct kernfs_root *root); |
294 | ||
324a56e1 | 295 | struct kernfs_node *kernfs_create_dir_ns(struct kernfs_node *parent, |
bb8b9d09 TH |
296 | const char *name, umode_t mode, |
297 | void *priv, const void *ns); | |
ea015218 EB |
298 | struct kernfs_node *kernfs_create_empty_dir(struct kernfs_node *parent, |
299 | const char *name); | |
2063d608 TH |
300 | struct kernfs_node *__kernfs_create_file(struct kernfs_node *parent, |
301 | const char *name, | |
302 | umode_t mode, loff_t size, | |
303 | const struct kernfs_ops *ops, | |
304 | void *priv, const void *ns, | |
2063d608 | 305 | struct lock_class_key *key); |
324a56e1 TH |
306 | struct kernfs_node *kernfs_create_link(struct kernfs_node *parent, |
307 | const char *name, | |
308 | struct kernfs_node *target); | |
d35258ef | 309 | void kernfs_activate(struct kernfs_node *kn); |
324a56e1 | 310 | void kernfs_remove(struct kernfs_node *kn); |
6b0afc2a TH |
311 | void kernfs_break_active_protection(struct kernfs_node *kn); |
312 | void kernfs_unbreak_active_protection(struct kernfs_node *kn); | |
313 | bool kernfs_remove_self(struct kernfs_node *kn); | |
324a56e1 | 314 | int kernfs_remove_by_name_ns(struct kernfs_node *parent, const char *name, |
879f40d1 | 315 | const void *ns); |
324a56e1 | 316 | int kernfs_rename_ns(struct kernfs_node *kn, struct kernfs_node *new_parent, |
890ece16 | 317 | const char *new_name, const void *new_ns); |
324a56e1 TH |
318 | int kernfs_setattr(struct kernfs_node *kn, const struct iattr *iattr); |
319 | void kernfs_notify(struct kernfs_node *kn); | |
879f40d1 | 320 | |
4b93dc9b TH |
321 | const void *kernfs_super_ns(struct super_block *sb); |
322 | struct dentry *kernfs_mount_ns(struct file_system_type *fs_type, int flags, | |
26fc9cd2 JZ |
323 | struct kernfs_root *root, unsigned long magic, |
324 | bool *new_sb_created, const void *ns); | |
4b93dc9b | 325 | void kernfs_kill_sb(struct super_block *sb); |
4e26445f | 326 | struct super_block *kernfs_pin_sb(struct kernfs_root *root, const void *ns); |
4b93dc9b TH |
327 | |
328 | void kernfs_init(void); | |
329 | ||
ba341d55 | 330 | #else /* CONFIG_KERNFS */ |
879f40d1 | 331 | |
df23fc39 | 332 | static inline enum kernfs_node_type kernfs_type(struct kernfs_node *kn) |
cf9e5a73 TH |
333 | { return 0; } /* whatever */ |
334 | ||
324a56e1 | 335 | static inline void kernfs_enable_ns(struct kernfs_node *kn) { } |
cf9e5a73 | 336 | |
324a56e1 | 337 | static inline bool kernfs_ns_enabled(struct kernfs_node *kn) |
ac9bba03 TH |
338 | { return false; } |
339 | ||
3eef34ad TH |
340 | static inline int kernfs_name(struct kernfs_node *kn, char *buf, size_t buflen) |
341 | { return -ENOSYS; } | |
342 | ||
9acee9c5 TH |
343 | static inline size_t kernfs_path_len(struct kernfs_node *kn) |
344 | { return 0; } | |
345 | ||
9f6df573 AK |
346 | static inline char *kernfs_path(struct kernfs_node *kn, char *buf, |
347 | size_t buflen) | |
3eef34ad TH |
348 | { return NULL; } |
349 | ||
350 | static inline void pr_cont_kernfs_name(struct kernfs_node *kn) { } | |
351 | static inline void pr_cont_kernfs_path(struct kernfs_node *kn) { } | |
352 | ||
353 | static inline struct kernfs_node *kernfs_get_parent(struct kernfs_node *kn) | |
354 | { return NULL; } | |
355 | ||
324a56e1 TH |
356 | static inline struct kernfs_node * |
357 | kernfs_find_and_get_ns(struct kernfs_node *parent, const char *name, | |
ccf73cf3 TH |
358 | const void *ns) |
359 | { return NULL; } | |
bd96f76a TH |
360 | static inline struct kernfs_node * |
361 | kernfs_walk_and_get_ns(struct kernfs_node *parent, const char *path, | |
362 | const void *ns) | |
363 | { return NULL; } | |
ccf73cf3 | 364 | |
324a56e1 TH |
365 | static inline void kernfs_get(struct kernfs_node *kn) { } |
366 | static inline void kernfs_put(struct kernfs_node *kn) { } | |
ccf73cf3 | 367 | |
0c23b225 TH |
368 | static inline struct kernfs_node *kernfs_node_from_dentry(struct dentry *dentry) |
369 | { return NULL; } | |
370 | ||
371 | static inline struct kernfs_root *kernfs_root_from_sb(struct super_block *sb) | |
372 | { return NULL; } | |
373 | ||
fb02915f TH |
374 | static inline struct inode * |
375 | kernfs_get_inode(struct super_block *sb, struct kernfs_node *kn) | |
376 | { return NULL; } | |
377 | ||
80b9bbef | 378 | static inline struct kernfs_root * |
d35258ef TH |
379 | kernfs_create_root(struct kernfs_syscall_ops *scops, unsigned int flags, |
380 | void *priv) | |
ba7443bc TH |
381 | { return ERR_PTR(-ENOSYS); } |
382 | ||
383 | static inline void kernfs_destroy_root(struct kernfs_root *root) { } | |
384 | ||
324a56e1 | 385 | static inline struct kernfs_node * |
bb8b9d09 TH |
386 | kernfs_create_dir_ns(struct kernfs_node *parent, const char *name, |
387 | umode_t mode, void *priv, const void *ns) | |
93b2b8e4 TH |
388 | { return ERR_PTR(-ENOSYS); } |
389 | ||
324a56e1 | 390 | static inline struct kernfs_node * |
2063d608 TH |
391 | __kernfs_create_file(struct kernfs_node *parent, const char *name, |
392 | umode_t mode, loff_t size, const struct kernfs_ops *ops, | |
dfeb0750 | 393 | void *priv, const void *ns, struct lock_class_key *key) |
496f7394 TH |
394 | { return ERR_PTR(-ENOSYS); } |
395 | ||
324a56e1 TH |
396 | static inline struct kernfs_node * |
397 | kernfs_create_link(struct kernfs_node *parent, const char *name, | |
398 | struct kernfs_node *target) | |
5d0e26bb TH |
399 | { return ERR_PTR(-ENOSYS); } |
400 | ||
d35258ef TH |
401 | static inline void kernfs_activate(struct kernfs_node *kn) { } |
402 | ||
324a56e1 | 403 | static inline void kernfs_remove(struct kernfs_node *kn) { } |
879f40d1 | 404 | |
6b0afc2a TH |
405 | static inline bool kernfs_remove_self(struct kernfs_node *kn) |
406 | { return false; } | |
407 | ||
324a56e1 | 408 | static inline int kernfs_remove_by_name_ns(struct kernfs_node *kn, |
879f40d1 TH |
409 | const char *name, const void *ns) |
410 | { return -ENOSYS; } | |
411 | ||
324a56e1 TH |
412 | static inline int kernfs_rename_ns(struct kernfs_node *kn, |
413 | struct kernfs_node *new_parent, | |
890ece16 TH |
414 | const char *new_name, const void *new_ns) |
415 | { return -ENOSYS; } | |
416 | ||
324a56e1 | 417 | static inline int kernfs_setattr(struct kernfs_node *kn, |
5d60418e TH |
418 | const struct iattr *iattr) |
419 | { return -ENOSYS; } | |
420 | ||
324a56e1 | 421 | static inline void kernfs_notify(struct kernfs_node *kn) { } |
024f6471 | 422 | |
4b93dc9b TH |
423 | static inline const void *kernfs_super_ns(struct super_block *sb) |
424 | { return NULL; } | |
425 | ||
426 | static inline struct dentry * | |
427 | kernfs_mount_ns(struct file_system_type *fs_type, int flags, | |
26fc9cd2 JZ |
428 | struct kernfs_root *root, unsigned long magic, |
429 | bool *new_sb_created, const void *ns) | |
4b93dc9b TH |
430 | { return ERR_PTR(-ENOSYS); } |
431 | ||
432 | static inline void kernfs_kill_sb(struct super_block *sb) { } | |
433 | ||
434 | static inline void kernfs_init(void) { } | |
435 | ||
ba341d55 | 436 | #endif /* CONFIG_KERNFS */ |
879f40d1 | 437 | |
324a56e1 TH |
438 | static inline struct kernfs_node * |
439 | kernfs_find_and_get(struct kernfs_node *kn, const char *name) | |
ccf73cf3 | 440 | { |
324a56e1 | 441 | return kernfs_find_and_get_ns(kn, name, NULL); |
ccf73cf3 TH |
442 | } |
443 | ||
bd96f76a TH |
444 | static inline struct kernfs_node * |
445 | kernfs_walk_and_get(struct kernfs_node *kn, const char *path) | |
446 | { | |
447 | return kernfs_walk_and_get_ns(kn, path, NULL); | |
448 | } | |
449 | ||
324a56e1 | 450 | static inline struct kernfs_node * |
bb8b9d09 TH |
451 | kernfs_create_dir(struct kernfs_node *parent, const char *name, umode_t mode, |
452 | void *priv) | |
93b2b8e4 | 453 | { |
bb8b9d09 | 454 | return kernfs_create_dir_ns(parent, name, mode, priv, NULL); |
93b2b8e4 TH |
455 | } |
456 | ||
324a56e1 TH |
457 | static inline struct kernfs_node * |
458 | kernfs_create_file_ns(struct kernfs_node *parent, const char *name, | |
517e64f5 TH |
459 | umode_t mode, loff_t size, const struct kernfs_ops *ops, |
460 | void *priv, const void *ns) | |
461 | { | |
462 | struct lock_class_key *key = NULL; | |
463 | ||
464 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | |
465 | key = (struct lock_class_key *)&ops->lockdep_key; | |
466 | #endif | |
2063d608 | 467 | return __kernfs_create_file(parent, name, mode, size, ops, priv, ns, |
dfeb0750 | 468 | key); |
517e64f5 TH |
469 | } |
470 | ||
324a56e1 TH |
471 | static inline struct kernfs_node * |
472 | kernfs_create_file(struct kernfs_node *parent, const char *name, umode_t mode, | |
496f7394 TH |
473 | loff_t size, const struct kernfs_ops *ops, void *priv) |
474 | { | |
475 | return kernfs_create_file_ns(parent, name, mode, size, ops, priv, NULL); | |
476 | } | |
477 | ||
324a56e1 | 478 | static inline int kernfs_remove_by_name(struct kernfs_node *parent, |
879f40d1 TH |
479 | const char *name) |
480 | { | |
481 | return kernfs_remove_by_name_ns(parent, name, NULL); | |
482 | } | |
483 | ||
0c23b225 TH |
484 | static inline int kernfs_rename(struct kernfs_node *kn, |
485 | struct kernfs_node *new_parent, | |
486 | const char *new_name) | |
487 | { | |
488 | return kernfs_rename_ns(kn, new_parent, new_name, NULL); | |
489 | } | |
490 | ||
4b93dc9b TH |
491 | static inline struct dentry * |
492 | kernfs_mount(struct file_system_type *fs_type, int flags, | |
26fc9cd2 JZ |
493 | struct kernfs_root *root, unsigned long magic, |
494 | bool *new_sb_created) | |
4b93dc9b | 495 | { |
26fc9cd2 JZ |
496 | return kernfs_mount_ns(fs_type, flags, root, |
497 | magic, new_sb_created, NULL); | |
4b93dc9b TH |
498 | } |
499 | ||
b8441ed2 | 500 | #endif /* __LINUX_KERNFS_H */ |