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