blob: 3e58863de51444eb4bacb0f84868c1a1b346b2dc
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 | 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 | * block_dev.c |
23 | */ |
24 | #ifdef CONFIG_BLOCK |
25 | extern void __init bdev_cache_init(void); |
26 | |
27 | extern int __sync_blockdev(struct block_device *bdev, int wait); |
28 | |
29 | #else |
30 | static inline void bdev_cache_init(void) |
31 | { |
32 | } |
33 | |
34 | static inline int __sync_blockdev(struct block_device *bdev, int wait) |
35 | { |
36 | return 0; |
37 | } |
38 | #endif |
39 | |
40 | /* |
41 | * buffer.c |
42 | */ |
43 | extern void guard_bio_eod(int rw, struct bio *bio); |
44 | extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len, |
45 | get_block_t *get_block, struct iomap *iomap); |
46 | |
47 | /* |
48 | * char_dev.c |
49 | */ |
50 | extern void __init chrdev_init(void); |
51 | |
52 | /* |
53 | * namei.c |
54 | */ |
55 | extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *); |
56 | extern int vfs_path_lookup(struct dentry *, struct vfsmount *, |
57 | const char *, unsigned int, struct path *); |
58 | |
59 | /* |
60 | * namespace.c |
61 | */ |
62 | extern void *copy_mount_options(const void __user *); |
63 | extern char *copy_mount_string(const void __user *); |
64 | |
65 | extern struct vfsmount *lookup_mnt(struct path *); |
66 | extern int finish_automount(struct vfsmount *, struct path *); |
67 | |
68 | extern int sb_prepare_remount_readonly(struct super_block *); |
69 | |
70 | extern void __init mnt_init(void); |
71 | |
72 | extern int __mnt_want_write(struct vfsmount *); |
73 | extern int __mnt_want_write_file(struct file *); |
74 | extern void __mnt_drop_write(struct vfsmount *); |
75 | extern void __mnt_drop_write_file(struct file *); |
76 | |
77 | /* |
78 | * fs_struct.c |
79 | */ |
80 | extern void chroot_fs_refs(const struct path *, const struct path *); |
81 | |
82 | /* |
83 | * file_table.c |
84 | */ |
85 | extern struct file *get_empty_filp(void); |
86 | |
87 | /* |
88 | * super.c |
89 | */ |
90 | extern int do_remount_sb(struct super_block *, int, void *, int); |
91 | extern int do_remount_sb2(struct vfsmount *, struct super_block *, int, |
92 | void *, int); |
93 | extern bool trylock_super(struct super_block *sb); |
94 | extern struct dentry *mount_fs(struct file_system_type *, |
95 | int, const char *, struct vfsmount *, void *); |
96 | extern struct super_block *user_get_super(dev_t); |
97 | |
98 | /* |
99 | * open.c |
100 | */ |
101 | struct open_flags { |
102 | int open_flag; |
103 | umode_t mode; |
104 | int acc_mode; |
105 | int intent; |
106 | int lookup_flags; |
107 | }; |
108 | extern struct file *do_filp_open(int dfd, struct filename *pathname, |
109 | const struct open_flags *op); |
110 | extern struct file *do_file_open_root(struct dentry *, struct vfsmount *, |
111 | const char *, const struct open_flags *); |
112 | |
113 | extern long do_handle_open(int mountdirfd, |
114 | struct file_handle __user *ufh, int open_flag); |
115 | extern int open_check_o_direct(struct file *f); |
116 | extern int vfs_open(const struct path *, struct file *, const struct cred *); |
117 | extern struct file *filp_clone_open(struct file *); |
118 | |
119 | /* |
120 | * inode.c |
121 | */ |
122 | extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc); |
123 | extern void inode_add_lru(struct inode *inode); |
124 | extern int dentry_needs_remove_privs(struct dentry *dentry); |
125 | |
126 | extern bool __atime_needs_update(const struct path *, struct inode *, bool); |
127 | static inline bool atime_needs_update_rcu(const struct path *path, |
128 | struct inode *inode) |
129 | { |
130 | return __atime_needs_update(path, inode, true); |
131 | } |
132 | |
133 | extern bool atime_needs_update_rcu(const struct path *, struct inode *); |
134 | |
135 | /* |
136 | * fs-writeback.c |
137 | */ |
138 | extern void inode_io_list_del(struct inode *inode); |
139 | |
140 | extern long get_nr_dirty_inodes(void); |
141 | extern int invalidate_inodes(struct super_block *, bool); |
142 | |
143 | /* |
144 | * dcache.c |
145 | */ |
146 | extern struct dentry *__d_alloc(struct super_block *, const struct qstr *); |
147 | extern int d_set_mounted(struct dentry *dentry); |
148 | extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc); |
149 | extern struct dentry *d_alloc_cursor(struct dentry *); |
150 | |
151 | /* |
152 | * read_write.c |
153 | */ |
154 | extern int rw_verify_area(int, struct file *, const loff_t *, size_t); |
155 | |
156 | /* |
157 | * pipe.c |
158 | */ |
159 | extern const struct file_operations pipefifo_fops; |
160 | |
161 | /* |
162 | * fs_pin.c |
163 | */ |
164 | extern void group_pin_kill(struct hlist_head *p); |
165 | extern void mnt_pin_kill(struct mount *m); |
166 | |
167 | /* |
168 | * fs/nsfs.c |
169 | */ |
170 | extern const struct dentry_operations ns_dentry_operations; |
171 | |
172 | /* |
173 | * fs/ioctl.c |
174 | */ |
175 | extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd, |
176 | unsigned long arg); |
177 | extern long vfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
178 | |
179 | /* |
180 | * iomap support: |
181 | */ |
182 | typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len, |
183 | void *data, struct iomap *iomap); |
184 | |
185 | loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length, |
186 | unsigned flags, struct iomap_ops *ops, void *data, |
187 | iomap_actor_t actor); |
188 |