Linux kernel mirror (for testing)
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linux
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;
17
18/*
19 * block_dev.c
20 */
21#ifdef CONFIG_BLOCK
22extern void __init bdev_cache_init(void);
23
24extern int __sync_blockdev(struct block_device *bdev, int wait);
25
26#else
27static inline void bdev_cache_init(void)
28{
29}
30
31static inline int __sync_blockdev(struct block_device *bdev, int wait)
32{
33 return 0;
34}
35#endif
36
37/*
38 * buffer.c
39 */
40extern void guard_bio_eod(int rw, struct bio *bio);
41extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
42 get_block_t *get_block, struct iomap *iomap);
43void __generic_write_end(struct inode *inode, loff_t pos, unsigned copied,
44 struct page *page);
45
46/*
47 * char_dev.c
48 */
49extern void __init chrdev_init(void);
50
51/*
52 * fs_context.c
53 */
54extern const struct fs_context_operations legacy_fs_context_ops;
55extern int parse_monolithic_mount_data(struct fs_context *, void *);
56extern void fc_drop_locked(struct fs_context *);
57extern void vfs_clean_context(struct fs_context *fc);
58extern int finish_clean_context(struct fs_context *fc);
59
60/*
61 * namei.c
62 */
63extern int filename_lookup(int dfd, struct filename *name, unsigned flags,
64 struct path *path, struct path *root);
65extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
66extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
67 const char *, unsigned int, struct path *);
68long do_mknodat(int dfd, const char __user *filename, umode_t mode,
69 unsigned int dev);
70long do_mkdirat(int dfd, const char __user *pathname, umode_t mode);
71long do_rmdir(int dfd, const char __user *pathname);
72long do_unlinkat(int dfd, struct filename *name);
73long do_symlinkat(const char __user *oldname, int newdfd,
74 const char __user *newname);
75int do_linkat(int olddfd, const char __user *oldname, int newdfd,
76 const char __user *newname, int flags);
77
78/*
79 * namespace.c
80 */
81extern void *copy_mount_options(const void __user *);
82extern char *copy_mount_string(const void __user *);
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/*
96 * fs_struct.c
97 */
98extern void chroot_fs_refs(const struct path *, const struct path *);
99
100/*
101 * file_table.c
102 */
103extern struct file *alloc_empty_file(int, const struct cred *);
104extern struct file *alloc_empty_file_noaccount(int, const struct cred *);
105
106/*
107 * super.c
108 */
109extern int reconfigure_super(struct fs_context *);
110extern bool trylock_super(struct super_block *sb);
111extern struct super_block *user_get_super(dev_t);
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 *);
159
160/*
161 * read_write.c
162 */
163extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
164
165/*
166 * pipe.c
167 */
168extern const struct file_operations pipefifo_fops;
169
170/*
171 * fs_pin.c
172 */
173extern void group_pin_kill(struct hlist_head *p);
174extern void mnt_pin_kill(struct mount *m);
175
176/*
177 * fs/nsfs.c
178 */
179extern const struct dentry_operations ns_dentry_operations;
180
181/*
182 * fs/ioctl.c
183 */
184extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd,
185 unsigned long arg);
186
187/*
188 * iomap support:
189 */
190typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len,
191 void *data, struct iomap *iomap);
192
193loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length,
194 unsigned flags, const struct iomap_ops *ops, void *data,
195 iomap_actor_t actor);
196
197/* direct-io.c: */
198int sb_init_dio_done_wq(struct super_block *sb);