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192.168.1.100 / T103 / 1f884588077ad3476b9c91cbb0ee9ee0332bbb68 / . / src / kernel / linux / v4.14 / fs / internal.h
blob: b4338451c1e41a837b28d1698c05d927c18ef81c [file] [log] [blame]
rjw1f884582022-01-06 17:20:42 +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);
46
47/*
48 * char_dev.c
49 */
50extern void __init chrdev_init(void);
51
52/*
53 * namei.c
54 */
55extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
56extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
57 const char *, unsigned int, struct path *);
58
59/*
60 * namespace.c
61 */
62extern void *copy_mount_options(const void __user *);
63extern char *copy_mount_string(const void __user *);
64
65extern struct vfsmount *lookup_mnt(const struct path *);
66extern int finish_automount(struct vfsmount *, struct path *);
67
68extern int sb_prepare_remount_readonly(struct super_block *);
69
70extern void __init mnt_init(void);
71
72extern int __mnt_want_write(struct vfsmount *);
73extern int __mnt_want_write_file(struct file *);
74extern int mnt_want_write_file_path(struct file *);
75extern void __mnt_drop_write(struct vfsmount *);
76extern void __mnt_drop_write_file(struct file *);
77extern void mnt_drop_write_file_path(struct file *);
78
79/*
80 * fs_struct.c
81 */
82extern void chroot_fs_refs(const struct path *, const struct path *);
83
84/*
85 * file_table.c
86 */
87extern struct file *get_empty_filp(void);
88
89/*
90 * super.c
91 */
92extern int do_remount_sb(struct super_block *, int, void *, int);
93extern int do_remount_sb2(struct vfsmount *, struct super_block *, int,
94 void *, int);
95extern bool trylock_super(struct super_block *sb);
96extern struct dentry *mount_fs(struct file_system_type *,
97 int, const char *, struct vfsmount *, void *);
98extern struct super_block *user_get_super(dev_t);
99
100/*
101 * open.c
102 */
103struct open_flags {
104 int open_flag;
105 umode_t mode;
106 int acc_mode;
107 int intent;
108 int lookup_flags;
109};
110extern struct file *do_filp_open(int dfd, struct filename *pathname,
111 const struct open_flags *op);
112extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
113 const char *, const struct open_flags *);
114
115extern int open_check_o_direct(struct file *f);
116extern int vfs_open(const struct path *, struct file *, const struct cred *);
117extern struct file *filp_clone_open(struct file *);
118
119/*
120 * inode.c
121 */
122extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
123extern void inode_add_lru(struct inode *inode);
124extern int dentry_needs_remove_privs(struct dentry *dentry);
125
126extern bool __atime_needs_update(const struct path *, struct inode *, bool);
127static 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/*
134 * fs-writeback.c
135 */
136extern void inode_io_list_del(struct inode *inode);
137
138extern long get_nr_dirty_inodes(void);
139extern int invalidate_inodes(struct super_block *, bool);
140
141/*
142 * dcache.c
143 */
144extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
145extern int d_set_mounted(struct dentry *dentry);
146extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
147extern struct dentry *d_alloc_cursor(struct dentry *);
148
149/*
150 * read_write.c
151 */
152extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
153
154/*
155 * pipe.c
156 */
157extern const struct file_operations pipefifo_fops;
158
159/*
160 * fs_pin.c
161 */
162extern void group_pin_kill(struct hlist_head *p);
163extern void mnt_pin_kill(struct mount *m);
164
165/*
166 * fs/nsfs.c
167 */
168extern const struct dentry_operations ns_dentry_operations;
169
170/*
171 * fs/ioctl.c
172 */
173extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd,
174 unsigned long arg);
175extern long vfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
176
177/*
178 * iomap support:
179 */
180typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len,
181 void *data, struct iomap *iomap);
182
183loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length,
184 unsigned flags, const struct iomap_ops *ops, void *data,
185 iomap_actor_t actor);
186
187/* direct-io.c: */
188int sb_init_dio_done_wq(struct super_block *sb);