Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/* fs/ internal definitions
3 *
4 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
6 */
7
8struct super_block;
9struct file_system_type;
10struct iomap;
11struct iomap_ops;
12struct linux_binprm;
13struct path;
14struct mount;
15struct shrink_control;
16struct fs_context;
17struct user_namespace;
18
19/*
20 * block_dev.c
21 */
22#ifdef CONFIG_BLOCK
23extern void __init bdev_cache_init(void);
24
25extern int __sync_blockdev(struct block_device *bdev, int wait);
26
27#else
28static inline void bdev_cache_init(void)
29{
30}
31
32static inline int __sync_blockdev(struct block_device *bdev, int wait)
33{
34 return 0;
35}
36#endif
37
38/*
39 * buffer.c
40 */
41extern void guard_bio_eod(int rw, struct bio *bio);
42extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
43 get_block_t *get_block, struct iomap *iomap);
44
45/*
46 * char_dev.c
47 */
48extern void __init chrdev_init(void);
49
50/*
51 * fs_context.c
52 */
53extern const struct fs_context_operations legacy_fs_context_ops;
54extern int parse_monolithic_mount_data(struct fs_context *, void *);
55extern void fc_drop_locked(struct fs_context *);
56extern void vfs_clean_context(struct fs_context *fc);
57extern int finish_clean_context(struct fs_context *fc);
58
59/*
60 * namei.c
61 */
62extern int filename_lookup(int dfd, struct filename *name, unsigned flags,
63 struct path *path, struct path *root);
64extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
65extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
66 const char *, unsigned int, struct path *);
67long do_mknodat(int dfd, const char __user *filename, umode_t mode,
68 unsigned int dev);
69long do_mkdirat(int dfd, const char __user *pathname, umode_t mode);
70long do_rmdir(int dfd, const char __user *pathname);
71long do_unlinkat(int dfd, struct filename *name);
72long do_symlinkat(const char __user *oldname, int newdfd,
73 const char __user *newname);
74int do_linkat(int olddfd, const char __user *oldname, int newdfd,
75 const char __user *newname, int flags);
76
77/*
78 * namespace.c
79 */
80extern void *copy_mount_options(const void __user *);
81extern char *copy_mount_string(const void __user *);
82
83extern struct vfsmount *lookup_mnt(const struct path *);
84extern int finish_automount(struct vfsmount *, struct path *);
85
86extern int sb_prepare_remount_readonly(struct super_block *);
87
88extern void __init mnt_init(void);
89
90extern int __mnt_want_write_file(struct file *);
91extern void __mnt_drop_write_file(struct file *);
92
93extern void dissolve_on_fput(struct vfsmount *);
94/*
95 * fs_struct.c
96 */
97extern void chroot_fs_refs(const struct path *, const struct path *);
98
99/*
100 * file_table.c
101 */
102extern struct file *alloc_empty_file(int, const struct cred *);
103extern struct file *alloc_empty_file_noaccount(int, const struct cred *);
104
105/*
106 * super.c
107 */
108extern int reconfigure_super(struct fs_context *);
109extern bool trylock_super(struct super_block *sb);
110extern struct super_block *user_get_super(dev_t);
111extern bool mount_capable(struct fs_context *);
112
113/*
114 * open.c
115 */
116struct open_flags {
117 int open_flag;
118 umode_t mode;
119 int acc_mode;
120 int intent;
121 int lookup_flags;
122};
123extern struct file *do_filp_open(int dfd, struct filename *pathname,
124 const struct open_flags *op);
125extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
126 const char *, const struct open_flags *);
127
128long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
129long do_faccessat(int dfd, const char __user *filename, int mode);
130int do_fchmodat(int dfd, const char __user *filename, umode_t mode);
131int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
132 int flag);
133
134extern int vfs_open(const struct path *, struct file *);
135
136/*
137 * inode.c
138 */
139extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
140extern void inode_add_lru(struct inode *inode);
141extern int dentry_needs_remove_privs(struct dentry *dentry);
142
143/*
144 * fs-writeback.c
145 */
146extern void inode_io_list_del(struct inode *inode);
147
148extern long get_nr_dirty_inodes(void);
149extern int invalidate_inodes(struct super_block *, bool);
150
151/*
152 * dcache.c
153 */
154extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
155extern int d_set_mounted(struct dentry *dentry);
156extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
157extern struct dentry *d_alloc_cursor(struct dentry *);
158extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *);
159extern char *simple_dname(struct dentry *, char *, int);
160extern void dput_to_list(struct dentry *, struct list_head *);
161extern void shrink_dentry_list(struct list_head *);
162
163/*
164 * read_write.c
165 */
166extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
167
168/*
169 * pipe.c
170 */
171extern const struct file_operations pipefifo_fops;
172
173/*
174 * fs_pin.c
175 */
176extern void group_pin_kill(struct hlist_head *p);
177extern void mnt_pin_kill(struct mount *m);
178
179/*
180 * fs/nsfs.c
181 */
182extern const struct dentry_operations ns_dentry_operations;
183
184/*
185 * fs/ioctl.c
186 */
187extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd,
188 unsigned long arg);
189
190/* direct-io.c: */
191int sb_init_dio_done_wq(struct super_block *sb);