internal.h 5.3 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11
/* fs/ internal definitions
 *
 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

12
struct super_block;
13
struct file_system_type;
14
struct iomap;
15
struct iomap_ops;
16
struct linux_binprm;
17
struct path;
18
struct mount;
19
struct shrink_control;
20

21 22 23
/*
 * block_dev.c
 */
24
#ifdef CONFIG_BLOCK
25 26
extern void __init bdev_cache_init(void);

27 28
extern int __sync_blockdev(struct block_device *bdev, int wait);

29
#else
30 31 32
static inline void bdev_cache_init(void)
{
}
33

34 35 36 37
static inline int __sync_blockdev(struct block_device *bdev, int wait)
{
	return 0;
}
38
#endif
39

40 41 42 43
/*
 * buffer.c
 */
extern void guard_bio_eod(int rw, struct bio *bio);
44 45
extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
		get_block_t *get_block, struct iomap *iomap);
46

47 48 49 50 51
/*
 * char_dev.c
 */
extern void __init chrdev_init(void);

D
David Howells 已提交
52 53 54
/*
 * namei.c
 */
55 56 57
extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
			   const char *, unsigned int, struct path *);
58 59
long do_mknodat(int dfd, const char __user *filename, umode_t mode,
		unsigned int dev);
60
long do_mkdirat(int dfd, const char __user *pathname, umode_t mode);
61
long do_rmdir(int dfd, const char __user *pathname);
62
long do_unlinkat(int dfd, struct filename *name);
63 64
long do_symlinkat(const char __user *oldname, int newdfd,
		  const char __user *newname);
65 66
int do_linkat(int olddfd, const char __user *oldname, int newdfd,
	      const char __user *newname, int flags);
D
David Howells 已提交
67

68 69 70
/*
 * namespace.c
 */
71
extern void *copy_mount_options(const void __user *);
72
extern char *copy_mount_string(const void __user *);
73

74
extern struct vfsmount *lookup_mnt(const struct path *);
75
extern int finish_automount(struct vfsmount *, struct path *);
76

77
extern int sb_prepare_remount_readonly(struct super_block *);
A
Al Viro 已提交
78

79
extern void __init mnt_init(void);
80

81 82
extern int __mnt_want_write(struct vfsmount *);
extern int __mnt_want_write_file(struct file *);
83
extern int mnt_want_write_file_path(struct file *);
84 85
extern void __mnt_drop_write(struct vfsmount *);
extern void __mnt_drop_write_file(struct file *);
86
extern void mnt_drop_write_file_path(struct file *);
A
Al Viro 已提交
87

88 89 90
/*
 * fs_struct.c
 */
91
extern void chroot_fs_refs(const struct path *, const struct path *);
92 93 94 95

/*
 * file_table.c
 */
96
extern struct file *get_empty_filp(void);
A
Al Viro 已提交
97 98 99 100 101

/*
 * super.c
 */
extern int do_remount_sb(struct super_block *, int, void *, int);
102
extern bool trylock_super(struct super_block *sb);
103 104
extern struct dentry *mount_fs(struct file_system_type *,
			       int, const char *, void *);
A
Al Viro 已提交
105
extern struct super_block *user_get_super(dev_t);
106 107 108 109

/*
 * open.c
 */
110 111
struct open_flags {
	int open_flag;
112
	umode_t mode;
113 114
	int acc_mode;
	int intent;
115
	int lookup_flags;
116
};
117
extern struct file *do_filp_open(int dfd, struct filename *pathname,
118
		const struct open_flags *op);
A
Al Viro 已提交
119
extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
120
		const char *, const struct open_flags *);
A
Al Viro 已提交
121

122
long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
123
long do_faccessat(int dfd, const char __user *filename, int mode);
124
int do_fchmodat(int dfd, const char __user *filename, umode_t mode);
125 126
int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
		int flag);
127

128
extern int open_check_o_direct(struct file *f);
129
extern int vfs_open(const struct path *, struct file *, const struct cred *);
130

A
Al Viro 已提交
131 132 133
/*
 * inode.c
 */
134
extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
135
extern void inode_add_lru(struct inode *inode);
136
extern int dentry_needs_remove_privs(struct dentry *dentry);
137

138 139 140 141 142 143 144
extern bool __atime_needs_update(const struct path *, struct inode *, bool);
static inline bool atime_needs_update_rcu(const struct path *path,
					  struct inode *inode)
{
	return __atime_needs_update(path, inode, true);
}

145 146 147
/*
 * fs-writeback.c
 */
148
extern void inode_io_list_del(struct inode *inode);
149

150
extern long get_nr_dirty_inodes(void);
151
extern int invalidate_inodes(struct super_block *, bool);
152 153 154 155 156

/*
 * dcache.c
 */
extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
157
extern int d_set_mounted(struct dentry *dentry);
158
extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
A
Al Viro 已提交
159
extern struct dentry *d_alloc_cursor(struct dentry *);
160 161 162 163

/*
 * read_write.c
 */
A
Al Viro 已提交
164
extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
165 166 167 168 169

/*
 * pipe.c
 */
extern const struct file_operations pipefifo_fops;
170 171 172 173

/*
 * fs_pin.c
 */
174
extern void group_pin_kill(struct hlist_head *p);
175
extern void mnt_pin_kill(struct mount *m);
176 177 178 179

/*
 * fs/nsfs.c
 */
180
extern const struct dentry_operations ns_dentry_operations;
181 182 183 184 185 186 187

/*
 * fs/ioctl.c
 */
extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd,
		    unsigned long arg);
extern long vfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
188 189 190 191 192 193 194 195

/*
 * iomap support:
 */
typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len,
		void *data, struct iomap *iomap);

loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length,
196
		unsigned flags, const struct iomap_ops *ops, void *data,
197
		iomap_actor_t actor);
198 199 200

/* direct-io.c: */
int sb_init_dio_done_wq(struct super_block *sb);