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 int sb_prepare_remount_readonly(struct super_block *);
54
55 extern void __init mnt_init(void);
56
57 extern struct lglock vfsmount_lock;
58
59
60 /*
61 * fs_struct.c
62 */
63 extern void chroot_fs_refs(struct path *, struct path *);
64
65 /*
66 * file_table.c
67 */
68 extern void file_sb_list_add(struct file *f, struct super_block *sb);
69 extern void file_sb_list_del(struct file *f);
70 extern void mark_files_ro(struct super_block *);
71 extern struct file *get_empty_filp(void);
72
73 /*
74 * super.c
75 */
76 extern int do_remount_sb(struct super_block *, int, void *, int);
77 extern bool grab_super_passive(struct super_block *sb);
78 extern struct dentry *mount_fs(struct file_system_type *,
79 int, const char *, void *);
80 extern struct super_block *user_get_super(dev_t);
81
82 /*
83 * open.c
84 */
85 struct nameidata;
86 extern struct file *nameidata_to_filp(struct nameidata *);
87 extern void release_open_intent(struct nameidata *);
88 struct open_flags {
89 int open_flag;
90 umode_t mode;
91 int acc_mode;
92 int intent;
93 };
94 extern struct file *do_filp_open(int dfd, const char *pathname,
95 const struct open_flags *op, int lookup_flags);
96 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
97 const char *, const struct open_flags *, int lookup_flags);
98
99 extern long do_handle_open(int mountdirfd,
100 struct file_handle __user *ufh, int open_flag);
101
102 /*
103 * inode.c
104 */
105 extern spinlock_t inode_sb_list_lock;
106
107 /*
108 * fs-writeback.c
109 */
110 extern void inode_wb_list_del(struct inode *inode);
111
112 extern int get_nr_dirty_inodes(void);
113 extern void evict_inodes(struct super_block *);
114 extern int invalidate_inodes(struct super_block *, bool);
115
116 /*
117 * dcache.c
118 */
119 extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
120