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192.168.1.100 / T800 / refs/heads/GSW / . / src / kernel / linux / v4.19 / fs / internal.h
blob: 8d0ca52e2690ff00877bf82942c46409c8b82a24 [file] [log] [blame]
xjb04a4022021-11-25 15:01:52 +0800[diff] [blame]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;
20
21/*
22 * block_dev.c
23 */
24#ifdef CONFIG_BLOCK
25extern void __init bdev_cache_init(void);
26
27extern int __sync_blockdev(struct block_device *bdev, int wait);
28
29#else
30static inline void bdev_cache_init(void)
31{
32}
33
34static inline int __sync_blockdev(struct block_device *bdev, int wait)
35{
36 return 0;
37}
38#endif
39
40/*
41 * buffer.c
42 */
43extern void guard_bio_eod(int rw, struct bio *bio);
44extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
45 get_block_t *get_block, struct iomap *iomap);
46int __generic_write_end(struct inode *inode, loff_t pos, unsigned copied,
47 struct page *page);
48
49/*
50 * char_dev.c
51 */
52extern void __init chrdev_init(void);
53
54/*
55 * namei.c
56 */
57extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
58long do_mknodat(int dfd, const char __user *filename, umode_t mode,
59 unsigned int dev);
60long do_mkdirat(int dfd, const char __user *pathname, umode_t mode);
61long do_rmdir(int dfd, const char __user *pathname);
62long do_unlinkat(int dfd, struct filename *name);
63long do_symlinkat(const char __user *oldname, int newdfd,
64 const char __user *newname);
65int do_linkat(int olddfd, const char __user *oldname, int newdfd,
66 const char __user *newname, int flags);
67
68/*
69 * namespace.c
70 */
71extern void *copy_mount_options(const void __user *);
72extern char *copy_mount_string(const void __user *);
73
74extern struct vfsmount *lookup_mnt(const struct path *);
75extern int finish_automount(struct vfsmount *, struct path *);
76
77extern int sb_prepare_remount_readonly(struct super_block *);
78
79extern void __init mnt_init(void);
80
81extern int __mnt_want_write_file(struct file *);
82extern void __mnt_drop_write_file(struct file *);
83
84/*
85 * fs_struct.c
86 */
87extern void chroot_fs_refs(const struct path *, const struct path *);
88
89/*
90 * file_table.c
91 */
92extern struct file *alloc_empty_file(int, const struct cred *);
93extern struct file *alloc_empty_file_noaccount(int, const struct cred *);
94
95/*
96 * super.c
97 */
98extern int do_remount_sb(struct super_block *, int, void *, int);
99extern int do_remount_sb2(struct vfsmount *, struct super_block *, int,
100 void *, int);
101extern bool trylock_super(struct super_block *sb);
102extern struct dentry *mount_fs(struct file_system_type *,
103 int, const char *, struct vfsmount *, void *);
104extern struct super_block *user_get_super(dev_t);
105
106/*
107 * open.c
108 */
109struct open_flags {
110 int open_flag;
111 umode_t mode;
112 int acc_mode;
113 int intent;
114 int lookup_flags;
115};
116extern struct file *do_filp_open(int dfd, struct filename *pathname,
117 const struct open_flags *op);
118extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
119 const char *, const struct open_flags *);
120
121long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
122long do_faccessat(int dfd, const char __user *filename, int mode);
123int do_fchmodat(int dfd, const char __user *filename, umode_t mode);
124int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
125 int flag);
126
127extern int vfs_open(const struct path *, struct file *);
128
129/*
130 * inode.c
131 */
132extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
133extern void inode_add_lru(struct inode *inode);
134extern int dentry_needs_remove_privs(struct dentry *dentry);
135
136/*
137 * fs-writeback.c
138 */
139extern void inode_io_list_del(struct inode *inode);
140
141extern long get_nr_dirty_inodes(void);
142extern int invalidate_inodes(struct super_block *, bool);
143
144/*
145 * dcache.c
146 */
147extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
148extern int d_set_mounted(struct dentry *dentry);
149extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
150extern struct dentry *d_alloc_cursor(struct dentry *);
151
152/*
153 * read_write.c
154 */
155extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
156
157/*
158 * pipe.c
159 */
160extern const struct file_operations pipefifo_fops;
161
162/*
163 * fs_pin.c
164 */
165extern void group_pin_kill(struct hlist_head *p);
166extern void mnt_pin_kill(struct mount *m);
167
168/*
169 * fs/nsfs.c
170 */
171extern const struct dentry_operations ns_dentry_operations;
172
173/*
174 * fs/ioctl.c
175 */
176extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd,
177 unsigned long arg);
178
179/*
180 * iomap support:
181 */
182typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len,
183 void *data, struct iomap *iomap);
184
185loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length,
186 unsigned flags, const struct iomap_ops *ops, void *data,
187 iomap_actor_t actor);
188
189/* direct-io.c: */
190int sb_init_dio_done_wq(struct super_block *sb);