Line data Source code
1 : /* SPDX-License-Identifier: GPL-2.0-only */
2 : /*
3 : * kernfs.h - pseudo filesystem decoupled from vfs locking
4 : */
5 :
6 : #ifndef __LINUX_KERNFS_H
7 : #define __LINUX_KERNFS_H
8 :
9 : #include <linux/kernel.h>
10 : #include <linux/err.h>
11 : #include <linux/list.h>
12 : #include <linux/mutex.h>
13 : #include <linux/idr.h>
14 : #include <linux/lockdep.h>
15 : #include <linux/rbtree.h>
16 : #include <linux/atomic.h>
17 : #include <linux/uidgid.h>
18 : #include <linux/wait.h>
19 :
20 : struct file;
21 : struct dentry;
22 : struct iattr;
23 : struct seq_file;
24 : struct vm_area_struct;
25 : struct super_block;
26 : struct file_system_type;
27 : struct poll_table_struct;
28 : struct fs_context;
29 :
30 : struct kernfs_fs_context;
31 : struct kernfs_open_node;
32 : struct kernfs_iattrs;
33 :
34 : enum kernfs_node_type {
35 : KERNFS_DIR = 0x0001,
36 : KERNFS_FILE = 0x0002,
37 : KERNFS_LINK = 0x0004,
38 : };
39 :
40 : #define KERNFS_TYPE_MASK 0x000f
41 : #define KERNFS_FLAG_MASK ~KERNFS_TYPE_MASK
42 : #define KERNFS_MAX_USER_XATTRS 128
43 : #define KERNFS_USER_XATTR_SIZE_LIMIT (128 << 10)
44 :
45 : enum kernfs_node_flag {
46 : KERNFS_ACTIVATED = 0x0010,
47 : KERNFS_NS = 0x0020,
48 : KERNFS_HAS_SEQ_SHOW = 0x0040,
49 : KERNFS_HAS_MMAP = 0x0080,
50 : KERNFS_LOCKDEP = 0x0100,
51 : KERNFS_SUICIDAL = 0x0400,
52 : KERNFS_SUICIDED = 0x0800,
53 : KERNFS_EMPTY_DIR = 0x1000,
54 : KERNFS_HAS_RELEASE = 0x2000,
55 : };
56 :
57 : /* @flags for kernfs_create_root() */
58 : enum kernfs_root_flag {
59 : /*
60 : * kernfs_nodes are created in the deactivated state and invisible.
61 : * They require explicit kernfs_activate() to become visible. This
62 : * can be used to make related nodes become visible atomically
63 : * after all nodes are created successfully.
64 : */
65 : KERNFS_ROOT_CREATE_DEACTIVATED = 0x0001,
66 :
67 : /*
68 : * For regular files, if the opener has CAP_DAC_OVERRIDE, open(2)
69 : * succeeds regardless of the RW permissions. sysfs had an extra
70 : * layer of enforcement where open(2) fails with -EACCES regardless
71 : * of CAP_DAC_OVERRIDE if the permission doesn't have the
72 : * respective read or write access at all (none of S_IRUGO or
73 : * S_IWUGO) or the respective operation isn't implemented. The
74 : * following flag enables that behavior.
75 : */
76 : KERNFS_ROOT_EXTRA_OPEN_PERM_CHECK = 0x0002,
77 :
78 : /*
79 : * The filesystem supports exportfs operation, so userspace can use
80 : * fhandle to access nodes of the fs.
81 : */
82 : KERNFS_ROOT_SUPPORT_EXPORTOP = 0x0004,
83 :
84 : /*
85 : * Support user xattrs to be written to nodes rooted at this root.
86 : */
87 : KERNFS_ROOT_SUPPORT_USER_XATTR = 0x0008,
88 : };
89 :
90 : /* type-specific structures for kernfs_node union members */
91 : struct kernfs_elem_dir {
92 : unsigned long subdirs;
93 : /* children rbtree starts here and goes through kn->rb */
94 : struct rb_root children;
95 :
96 : /*
97 : * The kernfs hierarchy this directory belongs to. This fits
98 : * better directly in kernfs_node but is here to save space.
99 : */
100 : struct kernfs_root *root;
101 : };
102 :
103 : struct kernfs_elem_symlink {
104 : struct kernfs_node *target_kn;
105 : };
106 :
107 : struct kernfs_elem_attr {
108 : const struct kernfs_ops *ops;
109 : struct kernfs_open_node *open;
110 : loff_t size;
111 : struct kernfs_node *notify_next; /* for kernfs_notify() */
112 : };
113 :
114 : /*
115 : * kernfs_node - the building block of kernfs hierarchy. Each and every
116 : * kernfs node is represented by single kernfs_node. Most fields are
117 : * private to kernfs and shouldn't be accessed directly by kernfs users.
118 : *
119 : * As long as count reference is held, the kernfs_node itself is
120 : * accessible. Dereferencing elem or any other outer entity requires
121 : * active reference.
122 : */
123 : struct kernfs_node {
124 : atomic_t count;
125 : atomic_t active;
126 : #ifdef CONFIG_DEBUG_LOCK_ALLOC
127 : struct lockdep_map dep_map;
128 : #endif
129 : /*
130 : * Use kernfs_get_parent() and kernfs_name/path() instead of
131 : * accessing the following two fields directly. If the node is
132 : * never moved to a different parent, it is safe to access the
133 : * parent directly.
134 : */
135 : struct kernfs_node *parent;
136 : const char *name;
137 :
138 : struct rb_node rb;
139 :
140 : const void *ns; /* namespace tag */
141 : unsigned int hash; /* ns + name hash */
142 : union {
143 : struct kernfs_elem_dir dir;
144 : struct kernfs_elem_symlink symlink;
145 : struct kernfs_elem_attr attr;
146 : };
147 :
148 : void *priv;
149 :
150 : /*
151 : * 64bit unique ID. On 64bit ino setups, id is the ino. On 32bit,
152 : * the low 32bits are ino and upper generation.
153 : */
154 : u64 id;
155 :
156 : unsigned short flags;
157 : umode_t mode;
158 : struct kernfs_iattrs *iattr;
159 : };
160 :
161 : /*
162 : * kernfs_syscall_ops may be specified on kernfs_create_root() to support
163 : * syscalls. These optional callbacks are invoked on the matching syscalls
164 : * and can perform any kernfs operations which don't necessarily have to be
165 : * the exact operation requested. An active reference is held for each
166 : * kernfs_node parameter.
167 : */
168 : struct kernfs_syscall_ops {
169 : int (*show_options)(struct seq_file *sf, struct kernfs_root *root);
170 :
171 : int (*mkdir)(struct kernfs_node *parent, const char *name,
172 : umode_t mode);
173 : int (*rmdir)(struct kernfs_node *kn);
174 : int (*rename)(struct kernfs_node *kn, struct kernfs_node *new_parent,
175 : const char *new_name);
176 : int (*show_path)(struct seq_file *sf, struct kernfs_node *kn,
177 : struct kernfs_root *root);
178 : };
179 :
180 : struct kernfs_root {
181 : /* published fields */
182 : struct kernfs_node *kn;
183 : unsigned int flags; /* KERNFS_ROOT_* flags */
184 :
185 : /* private fields, do not use outside kernfs proper */
186 : struct idr ino_idr;
187 : u32 last_id_lowbits;
188 : u32 id_highbits;
189 : struct kernfs_syscall_ops *syscall_ops;
190 :
191 : /* list of kernfs_super_info of this root, protected by kernfs_mutex */
192 : struct list_head supers;
193 :
194 : wait_queue_head_t deactivate_waitq;
195 : };
196 :
197 : struct kernfs_open_file {
198 : /* published fields */
199 : struct kernfs_node *kn;
200 : struct file *file;
201 : struct seq_file *seq_file;
202 : void *priv;
203 :
204 : /* private fields, do not use outside kernfs proper */
205 : struct mutex mutex;
206 : struct mutex prealloc_mutex;
207 : int event;
208 : struct list_head list;
209 : char *prealloc_buf;
210 :
211 : size_t atomic_write_len;
212 : bool mmapped:1;
213 : bool released:1;
214 : const struct vm_operations_struct *vm_ops;
215 : };
216 :
217 : struct kernfs_ops {
218 : /*
219 : * Optional open/release methods. Both are called with
220 : * @of->seq_file populated.
221 : */
222 : int (*open)(struct kernfs_open_file *of);
223 : void (*release)(struct kernfs_open_file *of);
224 :
225 : /*
226 : * Read is handled by either seq_file or raw_read().
227 : *
228 : * If seq_show() is present, seq_file path is active. Other seq
229 : * operations are optional and if not implemented, the behavior is
230 : * equivalent to single_open(). @sf->private points to the
231 : * associated kernfs_open_file.
232 : *
233 : * read() is bounced through kernel buffer and a read larger than
234 : * PAGE_SIZE results in partial operation of PAGE_SIZE.
235 : */
236 : int (*seq_show)(struct seq_file *sf, void *v);
237 :
238 : void *(*seq_start)(struct seq_file *sf, loff_t *ppos);
239 : void *(*seq_next)(struct seq_file *sf, void *v, loff_t *ppos);
240 : void (*seq_stop)(struct seq_file *sf, void *v);
241 :
242 : ssize_t (*read)(struct kernfs_open_file *of, char *buf, size_t bytes,
243 : loff_t off);
244 :
245 : /*
246 : * write() is bounced through kernel buffer. If atomic_write_len
247 : * is not set, a write larger than PAGE_SIZE results in partial
248 : * operations of PAGE_SIZE chunks. If atomic_write_len is set,
249 : * writes upto the specified size are executed atomically but
250 : * larger ones are rejected with -E2BIG.
251 : */
252 : size_t atomic_write_len;
253 : /*
254 : * "prealloc" causes a buffer to be allocated at open for
255 : * all read/write requests. As ->seq_show uses seq_read()
256 : * which does its own allocation, it is incompatible with
257 : * ->prealloc. Provide ->read and ->write with ->prealloc.
258 : */
259 : bool prealloc;
260 : ssize_t (*write)(struct kernfs_open_file *of, char *buf, size_t bytes,
261 : loff_t off);
262 :
263 : __poll_t (*poll)(struct kernfs_open_file *of,
264 : struct poll_table_struct *pt);
265 :
266 : int (*mmap)(struct kernfs_open_file *of, struct vm_area_struct *vma);
267 :
268 : #ifdef CONFIG_DEBUG_LOCK_ALLOC
269 : struct lock_class_key lockdep_key;
270 : #endif
271 : };
272 :
273 : /*
274 : * The kernfs superblock creation/mount parameter context.
275 : */
276 : struct kernfs_fs_context {
277 : struct kernfs_root *root; /* Root of the hierarchy being mounted */
278 : void *ns_tag; /* Namespace tag of the mount (or NULL) */
279 : unsigned long magic; /* File system specific magic number */
280 :
281 : /* The following are set/used by kernfs_mount() */
282 : bool new_sb_created; /* Set to T if we allocated a new sb */
283 : };
284 :
285 : #ifdef CONFIG_KERNFS
286 :
287 65898 : static inline enum kernfs_node_type kernfs_type(struct kernfs_node *kn)
288 : {
289 65898 : return kn->flags & KERNFS_TYPE_MASK;
290 : }
291 :
292 3558 : static inline ino_t kernfs_id_ino(u64 id)
293 : {
294 : /* id is ino if ino_t is 64bit; otherwise, low 32bits */
295 3558 : if (sizeof(ino_t) >= sizeof(u64))
296 1653 : return id;
297 : else
298 : return (u32)id;
299 : }
300 :
301 1359 : static inline u32 kernfs_id_gen(u64 id)
302 : {
303 : /* gen is fixed at 1 if ino_t is 64bit; otherwise, high 32bits */
304 1359 : if (sizeof(ino_t) >= sizeof(u64))
305 1359 : return 1;
306 : else
307 : return id >> 32;
308 : }
309 :
310 3558 : static inline ino_t kernfs_ino(struct kernfs_node *kn)
311 : {
312 3558 : return kernfs_id_ino(kn->id);
313 : }
314 :
315 1359 : static inline ino_t kernfs_gen(struct kernfs_node *kn)
316 : {
317 1359 : return kernfs_id_gen(kn->id);
318 : }
319 :
320 : /**
321 : * kernfs_enable_ns - enable namespace under a directory
322 : * @kn: directory of interest, should be empty
323 : *
324 : * This is to be called right after @kn is created to enable namespace
325 : * under it. All children of @kn must have non-NULL namespace tags and
326 : * only the ones which match the super_block's tag will be visible.
327 : */
328 3 : static inline void kernfs_enable_ns(struct kernfs_node *kn)
329 : {
330 3 : WARN_ON_ONCE(kernfs_type(kn) != KERNFS_DIR);
331 3 : WARN_ON_ONCE(!RB_EMPTY_ROOT(&kn->dir.children));
332 3 : kn->flags |= KERNFS_NS;
333 3 : }
334 :
335 : /**
336 : * kernfs_ns_enabled - test whether namespace is enabled
337 : * @kn: the node to test
338 : *
339 : * Test whether namespace filtering is enabled for the children of @ns.
340 : */
341 36302 : static inline bool kernfs_ns_enabled(struct kernfs_node *kn)
342 : {
343 36302 : return kn->flags & KERNFS_NS;
344 : }
345 :
346 : int kernfs_name(struct kernfs_node *kn, char *buf, size_t buflen);
347 : int kernfs_path_from_node(struct kernfs_node *root_kn, struct kernfs_node *kn,
348 : char *buf, size_t buflen);
349 : void pr_cont_kernfs_name(struct kernfs_node *kn);
350 : void pr_cont_kernfs_path(struct kernfs_node *kn);
351 : struct kernfs_node *kernfs_get_parent(struct kernfs_node *kn);
352 : struct kernfs_node *kernfs_find_and_get_ns(struct kernfs_node *parent,
353 : const char *name, const void *ns);
354 : struct kernfs_node *kernfs_walk_and_get_ns(struct kernfs_node *parent,
355 : const char *path, const void *ns);
356 : void kernfs_get(struct kernfs_node *kn);
357 : void kernfs_put(struct kernfs_node *kn);
358 :
359 : struct kernfs_node *kernfs_node_from_dentry(struct dentry *dentry);
360 : struct kernfs_root *kernfs_root_from_sb(struct super_block *sb);
361 : struct inode *kernfs_get_inode(struct super_block *sb, struct kernfs_node *kn);
362 :
363 : struct dentry *kernfs_node_dentry(struct kernfs_node *kn,
364 : struct super_block *sb);
365 : struct kernfs_root *kernfs_create_root(struct kernfs_syscall_ops *scops,
366 : unsigned int flags, void *priv);
367 : void kernfs_destroy_root(struct kernfs_root *root);
368 :
369 : struct kernfs_node *kernfs_create_dir_ns(struct kernfs_node *parent,
370 : const char *name, umode_t mode,
371 : kuid_t uid, kgid_t gid,
372 : void *priv, const void *ns);
373 : struct kernfs_node *kernfs_create_empty_dir(struct kernfs_node *parent,
374 : const char *name);
375 : struct kernfs_node *__kernfs_create_file(struct kernfs_node *parent,
376 : const char *name, umode_t mode,
377 : kuid_t uid, kgid_t gid,
378 : loff_t size,
379 : const struct kernfs_ops *ops,
380 : void *priv, const void *ns,
381 : struct lock_class_key *key);
382 : struct kernfs_node *kernfs_create_link(struct kernfs_node *parent,
383 : const char *name,
384 : struct kernfs_node *target);
385 : void kernfs_activate(struct kernfs_node *kn);
386 : void kernfs_remove(struct kernfs_node *kn);
387 : void kernfs_break_active_protection(struct kernfs_node *kn);
388 : void kernfs_unbreak_active_protection(struct kernfs_node *kn);
389 : bool kernfs_remove_self(struct kernfs_node *kn);
390 : int kernfs_remove_by_name_ns(struct kernfs_node *parent, const char *name,
391 : const void *ns);
392 : int kernfs_rename_ns(struct kernfs_node *kn, struct kernfs_node *new_parent,
393 : const char *new_name, const void *new_ns);
394 : int kernfs_setattr(struct kernfs_node *kn, const struct iattr *iattr);
395 : __poll_t kernfs_generic_poll(struct kernfs_open_file *of,
396 : struct poll_table_struct *pt);
397 : void kernfs_notify(struct kernfs_node *kn);
398 :
399 : int kernfs_xattr_get(struct kernfs_node *kn, const char *name,
400 : void *value, size_t size);
401 : int kernfs_xattr_set(struct kernfs_node *kn, const char *name,
402 : const void *value, size_t size, int flags);
403 :
404 : const void *kernfs_super_ns(struct super_block *sb);
405 : int kernfs_get_tree(struct fs_context *fc);
406 : void kernfs_free_fs_context(struct fs_context *fc);
407 : void kernfs_kill_sb(struct super_block *sb);
408 :
409 : void kernfs_init(void);
410 :
411 : struct kernfs_node *kernfs_find_and_get_node_by_id(struct kernfs_root *root,
412 : u64 id);
413 : #else /* CONFIG_KERNFS */
414 :
415 : static inline enum kernfs_node_type kernfs_type(struct kernfs_node *kn)
416 : { return 0; } /* whatever */
417 :
418 : static inline void kernfs_enable_ns(struct kernfs_node *kn) { }
419 :
420 : static inline bool kernfs_ns_enabled(struct kernfs_node *kn)
421 : { return false; }
422 :
423 : static inline int kernfs_name(struct kernfs_node *kn, char *buf, size_t buflen)
424 : { return -ENOSYS; }
425 :
426 : static inline int kernfs_path_from_node(struct kernfs_node *root_kn,
427 : struct kernfs_node *kn,
428 : char *buf, size_t buflen)
429 : { return -ENOSYS; }
430 :
431 : static inline void pr_cont_kernfs_name(struct kernfs_node *kn) { }
432 : static inline void pr_cont_kernfs_path(struct kernfs_node *kn) { }
433 :
434 : static inline struct kernfs_node *kernfs_get_parent(struct kernfs_node *kn)
435 : { return NULL; }
436 :
437 : static inline struct kernfs_node *
438 : kernfs_find_and_get_ns(struct kernfs_node *parent, const char *name,
439 : const void *ns)
440 : { return NULL; }
441 : static inline struct kernfs_node *
442 : kernfs_walk_and_get_ns(struct kernfs_node *parent, const char *path,
443 : const void *ns)
444 : { return NULL; }
445 :
446 : static inline void kernfs_get(struct kernfs_node *kn) { }
447 : static inline void kernfs_put(struct kernfs_node *kn) { }
448 :
449 : static inline struct kernfs_node *kernfs_node_from_dentry(struct dentry *dentry)
450 : { return NULL; }
451 :
452 : static inline struct kernfs_root *kernfs_root_from_sb(struct super_block *sb)
453 : { return NULL; }
454 :
455 : static inline struct inode *
456 : kernfs_get_inode(struct super_block *sb, struct kernfs_node *kn)
457 : { return NULL; }
458 :
459 : static inline struct kernfs_root *
460 : kernfs_create_root(struct kernfs_syscall_ops *scops, unsigned int flags,
461 : void *priv)
462 : { return ERR_PTR(-ENOSYS); }
463 :
464 : static inline void kernfs_destroy_root(struct kernfs_root *root) { }
465 :
466 : static inline struct kernfs_node *
467 : kernfs_create_dir_ns(struct kernfs_node *parent, const char *name,
468 : umode_t mode, kuid_t uid, kgid_t gid,
469 : void *priv, const void *ns)
470 : { return ERR_PTR(-ENOSYS); }
471 :
472 : static inline struct kernfs_node *
473 : __kernfs_create_file(struct kernfs_node *parent, const char *name,
474 : umode_t mode, kuid_t uid, kgid_t gid,
475 : loff_t size, const struct kernfs_ops *ops,
476 : void *priv, const void *ns, struct lock_class_key *key)
477 : { return ERR_PTR(-ENOSYS); }
478 :
479 : static inline struct kernfs_node *
480 : kernfs_create_link(struct kernfs_node *parent, const char *name,
481 : struct kernfs_node *target)
482 : { return ERR_PTR(-ENOSYS); }
483 :
484 : static inline void kernfs_activate(struct kernfs_node *kn) { }
485 :
486 : static inline void kernfs_remove(struct kernfs_node *kn) { }
487 :
488 : static inline bool kernfs_remove_self(struct kernfs_node *kn)
489 : { return false; }
490 :
491 : static inline int kernfs_remove_by_name_ns(struct kernfs_node *kn,
492 : const char *name, const void *ns)
493 : { return -ENOSYS; }
494 :
495 : static inline int kernfs_rename_ns(struct kernfs_node *kn,
496 : struct kernfs_node *new_parent,
497 : const char *new_name, const void *new_ns)
498 : { return -ENOSYS; }
499 :
500 : static inline int kernfs_setattr(struct kernfs_node *kn,
501 : const struct iattr *iattr)
502 : { return -ENOSYS; }
503 :
504 : static inline void kernfs_notify(struct kernfs_node *kn) { }
505 :
506 : static inline int kernfs_xattr_get(struct kernfs_node *kn, const char *name,
507 : void *value, size_t size)
508 : { return -ENOSYS; }
509 :
510 : static inline int kernfs_xattr_set(struct kernfs_node *kn, const char *name,
511 : const void *value, size_t size, int flags)
512 : { return -ENOSYS; }
513 :
514 : static inline const void *kernfs_super_ns(struct super_block *sb)
515 : { return NULL; }
516 :
517 : static inline int kernfs_get_tree(struct fs_context *fc)
518 : { return -ENOSYS; }
519 :
520 : static inline void kernfs_free_fs_context(struct fs_context *fc) { }
521 :
522 : static inline void kernfs_kill_sb(struct super_block *sb) { }
523 :
524 : static inline void kernfs_init(void) { }
525 :
526 : #endif /* CONFIG_KERNFS */
527 :
528 : /**
529 : * kernfs_path - build full path of a given node
530 : * @kn: kernfs_node of interest
531 : * @buf: buffer to copy @kn's name into
532 : * @buflen: size of @buf
533 : *
534 : * If @kn is NULL result will be "(null)".
535 : *
536 : * Returns the length of the full path. If the full length is equal to or
537 : * greater than @buflen, @buf contains the truncated path with the trailing
538 : * '\0'. On error, -errno is returned.
539 : */
540 0 : static inline int kernfs_path(struct kernfs_node *kn, char *buf, size_t buflen)
541 : {
542 0 : return kernfs_path_from_node(kn, NULL, buf, buflen);
543 : }
544 :
545 : static inline struct kernfs_node *
546 98 : kernfs_find_and_get(struct kernfs_node *kn, const char *name)
547 : {
548 98 : return kernfs_find_and_get_ns(kn, name, NULL);
549 : }
550 :
551 : static inline struct kernfs_node *
552 0 : kernfs_walk_and_get(struct kernfs_node *kn, const char *path)
553 : {
554 0 : return kernfs_walk_and_get_ns(kn, path, NULL);
555 : }
556 :
557 : static inline struct kernfs_node *
558 98 : kernfs_create_dir(struct kernfs_node *parent, const char *name, umode_t mode,
559 : void *priv)
560 : {
561 196 : return kernfs_create_dir_ns(parent, name, mode,
562 98 : GLOBAL_ROOT_UID, GLOBAL_ROOT_GID,
563 : priv, NULL);
564 : }
565 :
566 : static inline struct kernfs_node *
567 : kernfs_create_file_ns(struct kernfs_node *parent, const char *name,
568 : umode_t mode, kuid_t uid, kgid_t gid,
569 : loff_t size, const struct kernfs_ops *ops,
570 : void *priv, const void *ns)
571 : {
572 : struct lock_class_key *key = NULL;
573 :
574 : #ifdef CONFIG_DEBUG_LOCK_ALLOC
575 : key = (struct lock_class_key *)&ops->lockdep_key;
576 : #endif
577 : return __kernfs_create_file(parent, name, mode, uid, gid,
578 : size, ops, priv, ns, key);
579 : }
580 :
581 : static inline struct kernfs_node *
582 : kernfs_create_file(struct kernfs_node *parent, const char *name, umode_t mode,
583 : loff_t size, const struct kernfs_ops *ops, void *priv)
584 : {
585 : return kernfs_create_file_ns(parent, name, mode,
586 : GLOBAL_ROOT_UID, GLOBAL_ROOT_GID,
587 : size, ops, priv, NULL);
588 : }
589 :
590 982 : static inline int kernfs_remove_by_name(struct kernfs_node *parent,
591 : const char *name)
592 : {
593 982 : return kernfs_remove_by_name_ns(parent, name, NULL);
594 : }
595 :
596 0 : static inline int kernfs_rename(struct kernfs_node *kn,
597 : struct kernfs_node *new_parent,
598 : const char *new_name)
599 : {
600 0 : return kernfs_rename_ns(kn, new_parent, new_name, NULL);
601 : }
602 :
603 : #endif /* __LINUX_KERNFS_H */
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