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