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
12struct super_block;
13struct file_system_type;
14struct iomap;
15struct iomap_ops;
16struct linux_binprm;
17struct path;
18struct mount;
19struct shrink_control;
20struct fs_context;
21
22/*
23 * block_dev.c
24 */
25#ifdef CONFIG_BLOCK
26extern void __init bdev_cache_init(void);
27
28extern int __sync_blockdev(struct block_device *bdev, int wait);
29
30#else
31static inline void bdev_cache_init(void)
32{
33}
34
35static inline int __sync_blockdev(struct block_device *bdev, int wait)
36{
37 return 0;
38}
39#endif
40
41/*
42 * buffer.c
43 */
44extern void guard_bio_eod(int rw, struct bio *bio);
45extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
46 get_block_t *get_block, struct iomap *iomap);
47int __generic_write_end(struct inode *inode, loff_t pos, unsigned copied,
48 struct page *page);
49
50/*
51 * char_dev.c
52 */
53extern void __init chrdev_init(void);
54
55/*
56 * fs_context.c
57 */
58extern int parse_monolithic_mount_data(struct fs_context *, void *);
59extern void fc_drop_locked(struct fs_context *);
60
61/*
62 * namei.c
63 */
64extern int filename_lookup(int dfd, struct filename *name, unsigned flags,
65 struct path *path, struct path *root);
66extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
67extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
68 const char *, unsigned int, struct path *);
69long do_mknodat(int dfd, const char __user *filename, umode_t mode,
70 unsigned int dev);
71long do_mkdirat(int dfd, const char __user *pathname, umode_t mode);
72long do_rmdir(int dfd, const char __user *pathname);
73long do_unlinkat(int dfd, struct filename *name);
74long do_symlinkat(const char __user *oldname, int newdfd,
75 const char __user *newname);
76int do_linkat(int olddfd, const char __user *oldname, int newdfd,
77 const char __user *newname, int flags);
78
79/*
80 * namespace.c
81 */
82extern void *copy_mount_options(const void __user *);
83extern char *copy_mount_string(const void __user *);
84
85extern struct vfsmount *lookup_mnt(const struct path *);
86extern int finish_automount(struct vfsmount *, struct path *);
87
88extern int sb_prepare_remount_readonly(struct super_block *);
89
90extern void __init mnt_init(void);
91
92extern int __mnt_want_write(struct vfsmount *);
93extern int __mnt_want_write_file(struct file *);
94extern void __mnt_drop_write(struct vfsmount *);
95extern void __mnt_drop_write_file(struct file *);
96
97/*
98 * fs_struct.c
99 */
100extern void chroot_fs_refs(const struct path *, const struct path *);
101
102/*
103 * file_table.c
104 */
105extern struct file *alloc_empty_file(int, const struct cred *);
106extern struct file *alloc_empty_file_noaccount(int, const struct cred *);
107
108/*
109 * super.c
110 */
111extern int reconfigure_super(struct fs_context *);
112extern bool trylock_super(struct super_block *sb);
113extern struct super_block *user_get_super(dev_t);
114
115/*
116 * open.c
117 */
118struct open_flags {
119 int open_flag;
120 umode_t mode;
121 int acc_mode;
122 int intent;
123 int lookup_flags;
124};
125extern struct file *do_filp_open(int dfd, struct filename *pathname,
126 const struct open_flags *op);
127extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
128 const char *, const struct open_flags *);
129
130long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
131long do_faccessat(int dfd, const char __user *filename, int mode);
132int do_fchmodat(int dfd, const char __user *filename, umode_t mode);
133int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
134 int flag);
135
136extern int vfs_open(const struct path *, struct file *);
137
138/*
139 * inode.c
140 */
141extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
142extern void inode_add_lru(struct inode *inode);
143extern int dentry_needs_remove_privs(struct dentry *dentry);
144
145/*
146 * fs-writeback.c
147 */
148extern void inode_io_list_del(struct inode *inode);
149
150extern long get_nr_dirty_inodes(void);
151extern int invalidate_inodes(struct super_block *, bool);
152
153/*
154 * dcache.c
155 */
156extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
157extern int d_set_mounted(struct dentry *dentry);
158extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
159extern struct dentry *d_alloc_cursor(struct dentry *);
160
161/*
162 * read_write.c
163 */
164extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
165
166/*
167 * pipe.c
168 */
169extern const struct file_operations pipefifo_fops;
170
171/*
172 * fs_pin.c
173 */
174extern void group_pin_kill(struct hlist_head *p);
175extern void mnt_pin_kill(struct mount *m);
176
177/*
178 * fs/nsfs.c
179 */
180extern const struct dentry_operations ns_dentry_operations;
181
182/*
183 * fs/ioctl.c
184 */
185extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd,
186 unsigned long arg);
187
188/*
189 * iomap support:
190 */
191typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len,
192 void *data, struct iomap *iomap);
193
194loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length,
195 unsigned flags, const struct iomap_ops *ops, void *data,
196 iomap_actor_t actor);
197
198/* direct-io.c: */
199int sb_init_dio_done_wq(struct super_block *sb);
200