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 * namei.c
46 */
47 extern int __inode_permission(struct inode *, int);
48
49 /*
50 * namespace.c
51 */
52 extern int copy_mount_options(const void __user *, unsigned long *);
53 extern int copy_mount_string(const void __user *, char **);
54
55 extern struct vfsmount *lookup_mnt(struct path *);
56 extern int finish_automount(struct vfsmount *, struct path *);
57
58 extern int sb_prepare_remount_readonly(struct super_block *);
59
60 extern void __init mnt_init(void);
61
62 extern struct lglock vfsmount_lock;
63
64 extern int __mnt_want_write(struct vfsmount *);
65 extern int __mnt_want_write_file(struct file *);
66 extern void __mnt_drop_write(struct vfsmount *);
67 extern void __mnt_drop_write_file(struct file *);
68
69 /*
70 * fs_struct.c
71 */
72 extern void chroot_fs_refs(const struct path *, const struct path *);
73
74 /*
75 * file_table.c
76 */
77 extern void file_sb_list_add(struct file *f, struct super_block *sb);
78 extern void file_sb_list_del(struct file *f);
79 extern void mark_files_ro(struct super_block *);
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 };
102 extern struct file *do_filp_open(int dfd, struct filename *pathname,
103 const struct open_flags *op, int flags);
104 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
105 const char *, const struct open_flags *, int lookup_flags);
106
107 extern long do_handle_open(int mountdirfd,
108 struct file_handle __user *ufh, int open_flag);
109 extern int open_check_o_direct(struct file *f);
110
111 /*
112 * inode.c
113 */
114 extern spinlock_t inode_sb_list_lock;
115 extern void inode_add_lru(struct inode *inode);
116
117 /*
118 * fs-writeback.c
119 */
120 extern void inode_wb_list_del(struct inode *inode);
121
122 extern int get_nr_dirty_inodes(void);
123 extern void evict_inodes(struct super_block *);
124 extern int invalidate_inodes(struct super_block *, bool);
125
126 /*
127 * dcache.c
128 */
129 extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
130
131 /*
132 * read_write.c
133 */
134 extern ssize_t __kernel_write(struct file *, const char *, size_t, loff_t *);
135
136 /*
137 * splice.c
138 */
139 extern long do_splice_direct(struct file *in, loff_t *ppos, struct file *out,
140 loff_t *opos, size_t len, unsigned int flags);
141
142 /*
143 * pipe.c
144 */
145 extern const struct file_operations pipefifo_fops;
146