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
12#include <linux/lglock.h>
13
14struct super_block;
15struct file_system_type;
16struct linux_binprm;
17struct path;
18
19/*
20 * block_dev.c
21 */
22#ifdef CONFIG_BLOCK
23extern struct super_block *blockdev_superblock;
24extern void __init bdev_cache_init(void);
25
26static inline int sb_is_blkdev_sb(struct super_block *sb)
27{
28    return sb == blockdev_superblock;
29}
30
31extern int __sync_blockdev(struct block_device *bdev, int wait);
32
33#else
34static inline void bdev_cache_init(void)
35{
36}
37
38static inline int sb_is_blkdev_sb(struct super_block *sb)
39{
40    return 0;
41}
42
43static inline int __sync_blockdev(struct block_device *bdev, int wait)
44{
45    return 0;
46}
47#endif
48
49/*
50 * char_dev.c
51 */
52extern void __init chrdev_init(void);
53
54/*
55 * exec.c
56 */
57extern int check_unsafe_exec(struct linux_binprm *);
58
59/*
60 * namespace.c
61 */
62extern int copy_mount_options(const void __user *, unsigned long *);
63extern int copy_mount_string(const void __user *, char **);
64
65extern unsigned int mnt_get_count(struct vfsmount *mnt);
66extern struct vfsmount *__lookup_mnt(struct vfsmount *, struct dentry *, int);
67extern struct vfsmount *lookup_mnt(struct path *);
68extern void mnt_set_mountpoint(struct vfsmount *, struct dentry *,
69                struct vfsmount *);
70extern void release_mounts(struct list_head *);
71extern void umount_tree(struct vfsmount *, int, struct list_head *);
72extern struct vfsmount *copy_tree(struct vfsmount *, struct dentry *, int);
73extern int finish_automount(struct vfsmount *, struct path *);
74
75extern void mnt_make_longterm(struct vfsmount *);
76extern void mnt_make_shortterm(struct vfsmount *);
77
78extern void __init mnt_init(void);
79
80DECLARE_BRLOCK(vfsmount_lock);
81
82
83/*
84 * fs_struct.c
85 */
86extern void chroot_fs_refs(struct path *, struct path *);
87
88/*
89 * file_table.c
90 */
91extern void file_sb_list_add(struct file *f, struct super_block *sb);
92extern void file_sb_list_del(struct file *f);
93extern void mark_files_ro(struct super_block *);
94extern struct file *get_empty_filp(void);
95
96/*
97 * super.c
98 */
99extern int do_remount_sb(struct super_block *, int, void *, int);
100extern void __put_super(struct super_block *sb);
101extern void put_super(struct super_block *sb);
102extern struct dentry *mount_fs(struct file_system_type *,
103                   int, const char *, void *);
104
105/*
106 * open.c
107 */
108struct nameidata;
109extern struct file *nameidata_to_filp(struct nameidata *);
110extern void release_open_intent(struct nameidata *);
111struct open_flags {
112    int open_flag;
113    int mode;
114    int acc_mode;
115    int intent;
116};
117extern struct file *do_filp_open(int dfd, const char *pathname,
118        const struct open_flags *op, int lookup_flags);
119extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
120        const char *, const struct open_flags *, int lookup_flags);
121
122extern long do_handle_open(int mountdirfd,
123               struct file_handle __user *ufh, int open_flag);
124
125/*
126 * inode.c
127 */
128extern spinlock_t inode_sb_list_lock;
129
130/*
131 * fs-writeback.c
132 */
133extern void inode_wb_list_del(struct inode *inode);
134
135extern int get_nr_dirty_inodes(void);
136extern void evict_inodes(struct super_block *);
137extern int invalidate_inodes(struct super_block *, bool);
138

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