Root/fs/internal.h

1/* fs/ internal definitions
2 *
3 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12struct super_block;
13struct linux_binprm;
14struct path;
15
16/*
17 * block_dev.c
18 */
19#ifdef CONFIG_BLOCK
20extern struct super_block *blockdev_superblock;
21extern void __init bdev_cache_init(void);
22
23static inline int sb_is_blkdev_sb(struct super_block *sb)
24{
25    return sb == blockdev_superblock;
26}
27
28extern int __sync_blockdev(struct block_device *bdev, int wait);
29
30#else
31static inline void bdev_cache_init(void)
32{
33}
34
35static inline int sb_is_blkdev_sb(struct super_block *sb)
36{
37    return 0;
38}
39
40static inline int __sync_blockdev(struct block_device *bdev, int wait)
41{
42    return 0;
43}
44#endif
45
46/*
47 * char_dev.c
48 */
49extern void __init chrdev_init(void);
50
51/*
52 * exec.c
53 */
54extern int check_unsafe_exec(struct linux_binprm *);
55
56/*
57 * namespace.c
58 */
59extern int copy_mount_options(const void __user *, unsigned long *);
60extern int copy_mount_string(const void __user *, char **);
61
62extern void free_vfsmnt(struct vfsmount *);
63extern struct vfsmount *alloc_vfsmnt(const char *);
64extern struct vfsmount *__lookup_mnt(struct vfsmount *, struct dentry *, int);
65extern void mnt_set_mountpoint(struct vfsmount *, struct dentry *,
66                struct vfsmount *);
67extern void release_mounts(struct list_head *);
68extern void umount_tree(struct vfsmount *, int, struct list_head *);
69extern struct vfsmount *copy_tree(struct vfsmount *, struct dentry *, int);
70
71extern void __init mnt_init(void);
72
73extern spinlock_t vfsmount_lock;
74
75/*
76 * fs_struct.c
77 */
78extern void chroot_fs_refs(struct path *, struct path *);
79
80/*
81 * file_table.c
82 */
83extern void mark_files_ro(struct super_block *);
84extern struct file *get_empty_filp(void);
85
86/*
87 * super.c
88 */
89extern int do_remount_sb(struct super_block *, int, void *, int);
90
91/*
92 * open.c
93 */
94struct nameidata;
95extern struct file *nameidata_to_filp(struct nameidata *);
96extern void release_open_intent(struct nameidata *);
97

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