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