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;
18struct pipe_inode_info;
19
20/*
21 * block_dev.c
22 */
23#ifdef CONFIG_BLOCK
24extern void __init bdev_cache_init(void);
25
26extern int __sync_blockdev(struct block_device *bdev, int wait);
27void iterate_bdevs(void (*)(struct block_device *, void *), void *);
28void emergency_thaw_bdev(struct super_block *sb);
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}
38static inline void iterate_bdevs(void (*f)(struct block_device *, void *),
39 void *arg)
40{
41}
42static inline int emergency_thaw_bdev(struct super_block *sb)
43{
44 return 0;
45}
46#endif /* CONFIG_BLOCK */
47
48/*
49 * buffer.c
50 */
51extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
52 get_block_t *get_block, struct iomap *iomap);
53
54/*
55 * char_dev.c
56 */
57extern void __init chrdev_init(void);
58
59/*
60 * fs_context.c
61 */
62extern const struct fs_context_operations legacy_fs_context_ops;
63extern int parse_monolithic_mount_data(struct fs_context *, void *);
64extern void fc_drop_locked(struct fs_context *);
65extern void vfs_clean_context(struct fs_context *fc);
66extern int finish_clean_context(struct fs_context *fc);
67
68/*
69 * namei.c
70 */
71extern int filename_lookup(int dfd, struct filename *name, unsigned flags,
72 struct path *path, struct path *root);
73extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
74 const char *, unsigned int, struct path *);
75long do_rmdir(int dfd, struct filename *name);
76long do_unlinkat(int dfd, struct filename *name);
77int may_linkat(struct user_namespace *mnt_userns, struct path *link);
78int do_renameat2(int olddfd, struct filename *oldname, int newdfd,
79 struct filename *newname, unsigned int flags);
80
81/*
82 * namespace.c
83 */
84extern struct vfsmount *lookup_mnt(const struct path *);
85extern int finish_automount(struct vfsmount *, struct path *);
86
87extern int sb_prepare_remount_readonly(struct super_block *);
88
89extern void __init mnt_init(void);
90
91extern int __mnt_want_write_file(struct file *);
92extern void __mnt_drop_write_file(struct file *);
93
94extern void dissolve_on_fput(struct vfsmount *);
95
96int path_mount(const char *dev_name, struct path *path,
97 const char *type_page, unsigned long flags, void *data_page);
98int path_umount(struct path *path, int flags);
99
100/*
101 * fs_struct.c
102 */
103extern void chroot_fs_refs(const struct path *, const struct path *);
104
105/*
106 * file_table.c
107 */
108extern struct file *alloc_empty_file(int, const struct cred *);
109extern struct file *alloc_empty_file_noaccount(int, const struct cred *);
110
111/*
112 * super.c
113 */
114extern int reconfigure_super(struct fs_context *);
115extern bool trylock_super(struct super_block *sb);
116struct super_block *user_get_super(dev_t, bool excl);
117void put_super(struct super_block *sb);
118extern bool mount_capable(struct fs_context *);
119
120/*
121 * open.c
122 */
123struct open_flags {
124 int open_flag;
125 umode_t mode;
126 int acc_mode;
127 int intent;
128 int lookup_flags;
129};
130extern struct file *do_filp_open(int dfd, struct filename *pathname,
131 const struct open_flags *op);
132extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
133 const char *, const struct open_flags *);
134extern struct open_how build_open_how(int flags, umode_t mode);
135extern int build_open_flags(const struct open_how *how, struct open_flags *op);
136extern int __close_fd_get_file(unsigned int fd, struct file **res);
137
138long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
139int chmod_common(const struct path *path, umode_t mode);
140int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
141 int flag);
142int chown_common(const struct path *path, uid_t user, gid_t group);
143extern int vfs_open(const struct path *, struct file *);
144
145/*
146 * inode.c
147 */
148extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
149extern void inode_add_lru(struct inode *inode);
150extern int dentry_needs_remove_privs(struct dentry *dentry);
151
152/*
153 * fs-writeback.c
154 */
155extern long get_nr_dirty_inodes(void);
156extern int invalidate_inodes(struct super_block *, bool);
157
158/*
159 * dcache.c
160 */
161extern int d_set_mounted(struct dentry *dentry);
162extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
163extern struct dentry *d_alloc_cursor(struct dentry *);
164extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *);
165extern char *simple_dname(struct dentry *, char *, int);
166extern void dput_to_list(struct dentry *, struct list_head *);
167extern void shrink_dentry_list(struct list_head *);
168
169/*
170 * read_write.c
171 */
172extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
173
174/*
175 * pipe.c
176 */
177extern const struct file_operations pipefifo_fops;
178
179/*
180 * fs_pin.c
181 */
182extern void group_pin_kill(struct hlist_head *p);
183extern void mnt_pin_kill(struct mount *m);
184
185/*
186 * fs/nsfs.c
187 */
188extern const struct dentry_operations ns_dentry_operations;
189
190/* direct-io.c: */
191int sb_init_dio_done_wq(struct super_block *sb);
192
193/*
194 * fs/stat.c:
195 */
196int do_statx(int dfd, const char __user *filename, unsigned flags,
197 unsigned int mask, struct statx __user *buffer);
198
199/*
200 * fs/splice.c:
201 */
202long splice_file_to_pipe(struct file *in,
203 struct pipe_inode_info *opipe,
204 loff_t *offset,
205 size_t len, unsigned int flags);