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init: add an init_chroot helper
[linux-2.6-block.git] / fs / internal.h
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CommitLineData
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 int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
42 get_block_t *get_block, struct iomap *iomap);
43
44/*
45 * char_dev.c
46 */
47extern void __init chrdev_init(void);
48
49/*
50 * fs_context.c
51 */
52extern const struct fs_context_operations legacy_fs_context_ops;
53extern int parse_monolithic_mount_data(struct fs_context *, void *);
54extern void fc_drop_locked(struct fs_context *);
55extern void vfs_clean_context(struct fs_context *fc);
56extern int finish_clean_context(struct fs_context *fc);
57
58/*
59 * namei.c
60 */
61extern int filename_lookup(int dfd, struct filename *name, unsigned flags,
62 struct path *path, struct path *root);
63extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
64 const char *, unsigned int, struct path *);
65long do_mknodat(int dfd, const char __user *filename, umode_t mode,
66 unsigned int dev);
67long do_mkdirat(int dfd, const char __user *pathname, umode_t mode);
68long do_rmdir(int dfd, struct filename *name);
69long do_unlinkat(int dfd, struct filename *name);
70long do_symlinkat(const char __user *oldname, int newdfd,
71 const char __user *newname);
72int do_linkat(int olddfd, const char __user *oldname, int newdfd,
73 const char __user *newname, int flags);
74
75/*
76 * namespace.c
77 */
78extern void *copy_mount_options(const void __user *);
79extern char *copy_mount_string(const void __user *);
80
81extern struct vfsmount *lookup_mnt(const struct path *);
82extern int finish_automount(struct vfsmount *, struct path *);
83
84extern int sb_prepare_remount_readonly(struct super_block *);
85
86extern void __init mnt_init(void);
87
88extern int __mnt_want_write_file(struct file *);
89extern void __mnt_drop_write_file(struct file *);
90
91extern void dissolve_on_fput(struct vfsmount *);
92
93int path_mount(const char *dev_name, struct path *path,
94 const char *type_page, unsigned long flags, void *data_page);
95int path_umount(struct path *path, int flags);
96
97/*
98 * fs_struct.c
99 */
100extern void chroot_fs_refs(const struct path *, const struct path *);
101
102/*
103 * file_table.c
104 */
105extern struct file *alloc_empty_file(int, const struct cred *);
106extern struct file *alloc_empty_file_noaccount(int, const struct cred *);
107
108/*
109 * super.c
110 */
111extern int reconfigure_super(struct fs_context *);
112extern bool trylock_super(struct super_block *sb);
113extern struct super_block *user_get_super(dev_t);
114extern bool mount_capable(struct fs_context *);
115
116/*
117 * open.c
118 */
119struct open_flags {
120 int open_flag;
121 umode_t mode;
122 int acc_mode;
123 int intent;
124 int lookup_flags;
125};
126extern struct file *do_filp_open(int dfd, struct filename *pathname,
127 const struct open_flags *op);
128extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
129 const char *, const struct open_flags *);
130extern struct open_how build_open_how(int flags, umode_t mode);
131extern int build_open_flags(const struct open_how *how, struct open_flags *op);
132
133long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
134int do_fchmodat(int dfd, const char __user *filename, umode_t mode);
135int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
136 int flag);
137
138extern int vfs_open(const struct path *, struct file *);
139
140/*
141 * inode.c
142 */
143extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
144extern void inode_add_lru(struct inode *inode);
145extern int dentry_needs_remove_privs(struct dentry *dentry);
146
147/*
148 * fs-writeback.c
149 */
150extern long get_nr_dirty_inodes(void);
151extern int invalidate_inodes(struct super_block *, bool);
152
153/*
154 * dcache.c
155 */
156extern int d_set_mounted(struct dentry *dentry);
157extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
158extern struct dentry *d_alloc_cursor(struct dentry *);
159extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *);
160extern char *simple_dname(struct dentry *, char *, int);
161extern void dput_to_list(struct dentry *, struct list_head *);
162extern void shrink_dentry_list(struct list_head *);
163
164/*
165 * read_write.c
166 */
167extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
168
169/*
170 * pipe.c
171 */
172extern const struct file_operations pipefifo_fops;
173
174/*
175 * fs_pin.c
176 */
177extern void group_pin_kill(struct hlist_head *p);
178extern void mnt_pin_kill(struct mount *m);
179
180/*
181 * fs/nsfs.c
182 */
183extern const struct dentry_operations ns_dentry_operations;
184
185/* direct-io.c: */
186int sb_init_dio_done_wq(struct super_block *sb);
187
188/*
189 * fs/stat.c:
190 */
191int do_statx(int dfd, const char __user *filename, unsigned flags,
192 unsigned int mask, struct statx __user *buffer);
Linux 6.x block layer and io_uring tree(s)