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 file_system_type;
14struct linux_binprm;
15struct path;
16struct mount;
17struct shrink_control;
18
19/*
20 * block_dev.c
21 */
22#ifdef CONFIG_BLOCK
23extern void __init bdev_cache_init(void);
24
25extern int __sync_blockdev(struct block_device *bdev, int wait);
26
27#else
28static inline void bdev_cache_init(void)
29{
30}
31
32static inline int __sync_blockdev(struct block_device *bdev, int wait)
33{
34	return 0;
35}
36#endif
37
38/*
39 * buffer.c
40 */
41extern void guard_bio_eod(int rw, struct bio *bio);
42
43/*
44 * char_dev.c
45 */
46extern void __init chrdev_init(void);
47
48/*
49 * namei.c
50 */
51extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
52extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
53			   const char *, unsigned int, struct path *);
54
55/*
56 * namespace.c
57 */
58extern int copy_mount_options(const void __user *, unsigned long *);
59extern char *copy_mount_string(const void __user *);
60
61extern struct vfsmount *lookup_mnt(struct path *);
62extern int finish_automount(struct vfsmount *, struct path *);
63
64extern int sb_prepare_remount_readonly(struct super_block *);
65
66extern void __init mnt_init(void);
67
68extern int __mnt_want_write(struct vfsmount *);
69extern int __mnt_want_write_file(struct file *);
70extern void __mnt_drop_write(struct vfsmount *);
71extern void __mnt_drop_write_file(struct file *);
72
73/*
74 * fs_struct.c
75 */
76extern void chroot_fs_refs(const struct path *, const struct path *);
77
78/*
79 * file_table.c
80 */
81extern struct file *get_empty_filp(void);
82
83/*
84 * super.c
85 */
86extern int do_remount_sb(struct super_block *, int, void *, int);
87extern bool trylock_super(struct super_block *sb);
88extern struct dentry *mount_fs(struct file_system_type *,
89			       int, const char *, void *);
90extern struct super_block *user_get_super(dev_t);
91
92/*
93 * open.c
94 */
95struct open_flags {
96	int open_flag;
97	umode_t mode;
98	int acc_mode;
99	int intent;
100	int lookup_flags;
101};
102extern struct file *do_filp_open(int dfd, struct filename *pathname,
103		const struct open_flags *op);
104extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
105		const char *, const struct open_flags *);
106
107extern long do_handle_open(int mountdirfd,
108			   struct file_handle __user *ufh, int open_flag);
109extern int open_check_o_direct(struct file *f);
110extern int vfs_open(const struct path *, struct file *, const struct cred *);
111
112/*
113 * inode.c
114 */
115extern spinlock_t inode_sb_list_lock;
116extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
117extern void inode_add_lru(struct inode *inode);
118
119/*
120 * fs-writeback.c
121 */
122extern void inode_wb_list_del(struct inode *inode);
123
124extern long get_nr_dirty_inodes(void);
125extern void evict_inodes(struct super_block *);
126extern int invalidate_inodes(struct super_block *, bool);
127
128/*
129 * dcache.c
130 */
131extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
132extern int d_set_mounted(struct dentry *dentry);
133extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
134
135/*
136 * read_write.c
137 */
138extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
139
140/*
141 * pipe.c
142 */
143extern const struct file_operations pipefifo_fops;
144
145/*
146 * fs_pin.c
147 */
148extern void group_pin_kill(struct hlist_head *p);
149extern void mnt_pin_kill(struct mount *m);
150
151/*
152 * fs/nsfs.c
153 */
154extern struct dentry_operations ns_dentry_operations;
155