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 struct super_block;
13 struct file_system_type;
14 struct linux_binprm;
15 struct path;
16 struct mount;
17 struct shrink_control;
18
19 /*
20 * block_dev.c
21 */
22 #ifdef CONFIG_BLOCK
23 extern void __init bdev_cache_init(void);
24
25 extern int __sync_blockdev(struct block_device *bdev, int wait);
26
27 #else
bdev_cache_init(void)28 static inline void bdev_cache_init(void)
29 {
30 }
31
__sync_blockdev(struct block_device * bdev,int wait)32 static inline int __sync_blockdev(struct block_device *bdev, int wait)
33 {
34 return 0;
35 }
36 #endif
37
38 /*
39 * buffer.c
40 */
41 extern void guard_bio_eod(int rw, struct bio *bio);
42
43 /*
44 * char_dev.c
45 */
46 extern void __init chrdev_init(void);
47
48 /*
49 * namei.c
50 */
51 extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
52 extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
53 const char *, unsigned int, struct path *);
54
55 /*
56 * namespace.c
57 */
58 extern int copy_mount_options(const void __user *, unsigned long *);
59 extern char *copy_mount_string(const void __user *);
60
61 extern struct vfsmount *lookup_mnt(struct path *);
62 extern int finish_automount(struct vfsmount *, struct path *);
63
64 extern int sb_prepare_remount_readonly(struct super_block *);
65
66 extern void __init mnt_init(void);
67
68 extern int __mnt_want_write(struct vfsmount *);
69 extern int __mnt_want_write_file(struct file *);
70 extern void __mnt_drop_write(struct vfsmount *);
71 extern void __mnt_drop_write_file(struct file *);
72
73 /*
74 * fs_struct.c
75 */
76 extern void chroot_fs_refs(const struct path *, const struct path *);
77
78 /*
79 * file_table.c
80 */
81 extern struct file *get_empty_filp(void);
82
83 /*
84 * super.c
85 */
86 extern int do_remount_sb(struct super_block *, int, void *, int);
87 extern int do_remount_sb2(struct vfsmount *, struct super_block *, int,
88 void *, int);
89 extern bool trylock_super(struct super_block *sb);
90 extern struct dentry *mount_fs(struct file_system_type *,
91 int, const char *, struct vfsmount *, void *);
92 extern struct super_block *user_get_super(dev_t);
93
94 /*
95 * open.c
96 */
97 struct open_flags {
98 int open_flag;
99 umode_t mode;
100 int acc_mode;
101 int intent;
102 int lookup_flags;
103 };
104 extern struct file *do_filp_open(int dfd, struct filename *pathname,
105 const struct open_flags *op);
106 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
107 const char *, const struct open_flags *);
108
109 extern long do_handle_open(int mountdirfd,
110 struct file_handle __user *ufh, int open_flag);
111 extern int open_check_o_direct(struct file *f);
112 extern int vfs_open(const struct path *, struct file *, const struct cred *);
113
114 /*
115 * inode.c
116 */
117 extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
118 extern void inode_add_lru(struct inode *inode);
119
120 /*
121 * fs-writeback.c
122 */
123 extern void inode_io_list_del(struct inode *inode);
124
125 extern long get_nr_dirty_inodes(void);
126 extern void evict_inodes(struct super_block *);
127 extern int invalidate_inodes(struct super_block *, bool);
128
129 /*
130 * dcache.c
131 */
132 extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
133 extern int d_set_mounted(struct dentry *dentry);
134 extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
135
136 /*
137 * read_write.c
138 */
139 extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
140
141 /*
142 * pipe.c
143 */
144 extern const struct file_operations pipefifo_fops;
145
146 /*
147 * fs_pin.c
148 */
149 extern void group_pin_kill(struct hlist_head *p);
150 extern void mnt_pin_kill(struct mount *m);
151
152 /*
153 * fs/nsfs.c
154 */
155 extern struct dentry_operations ns_dentry_operations;
156