1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* fs/ internal definitions
4 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
9 struct file_system_type
;
15 struct shrink_control
;
17 struct user_namespace
;
18 struct pipe_inode_info
;
24 extern void __init
bdev_cache_init(void);
26 extern int __sync_blockdev(struct block_device
*bdev
, int wait
);
27 void iterate_bdevs(void (*)(struct block_device
*, void *), void *);
28 void emergency_thaw_bdev(struct super_block
*sb
);
30 static inline void bdev_cache_init(void)
34 static inline int __sync_blockdev(struct block_device
*bdev
, int wait
)
38 static inline void iterate_bdevs(void (*f
)(struct block_device
*, void *),
42 static inline int emergency_thaw_bdev(struct super_block
*sb
)
46 #endif /* CONFIG_BLOCK */
51 int __block_write_begin_int(struct page
*page
, loff_t pos
, unsigned len
,
52 get_block_t
*get_block
, const struct iomap
*iomap
);
57 extern void __init
chrdev_init(void);
62 extern const struct fs_context_operations legacy_fs_context_ops
;
63 extern int parse_monolithic_mount_data(struct fs_context
*, void *);
64 extern void vfs_clean_context(struct fs_context
*fc
);
65 extern int finish_clean_context(struct fs_context
*fc
);
70 extern int filename_lookup(int dfd
, struct filename
*name
, unsigned flags
,
71 struct path
*path
, struct path
*root
);
72 extern int vfs_path_lookup(struct dentry
*, struct vfsmount
*,
73 const char *, unsigned int, struct path
*);
74 int do_rmdir(int dfd
, struct filename
*name
);
75 int do_unlinkat(int dfd
, struct filename
*name
);
76 int may_linkat(struct user_namespace
*mnt_userns
, struct path
*link
);
77 int do_renameat2(int olddfd
, struct filename
*oldname
, int newdfd
,
78 struct filename
*newname
, unsigned int flags
);
79 int do_mkdirat(int dfd
, struct filename
*name
, umode_t mode
);
80 int do_symlinkat(struct filename
*from
, int newdfd
, struct filename
*to
);
81 int do_linkat(int olddfd
, struct filename
*old
, int newdfd
,
82 struct filename
*new, int flags
);
87 extern struct vfsmount
*lookup_mnt(const struct path
*);
88 extern int finish_automount(struct vfsmount
*, struct path
*);
90 extern int sb_prepare_remount_readonly(struct super_block
*);
92 extern void __init
mnt_init(void);
94 extern int __mnt_want_write_file(struct file
*);
95 extern void __mnt_drop_write_file(struct file
*);
97 extern void dissolve_on_fput(struct vfsmount
*);
99 int path_mount(const char *dev_name
, struct path
*path
,
100 const char *type_page
, unsigned long flags
, void *data_page
);
101 int path_umount(struct path
*path
, int flags
);
106 extern void chroot_fs_refs(const struct path
*, const struct path
*);
111 extern struct file
*alloc_empty_file(int, const struct cred
*);
112 extern struct file
*alloc_empty_file_noaccount(int, const struct cred
*);
117 extern int reconfigure_super(struct fs_context
*);
118 extern bool trylock_super(struct super_block
*sb
);
119 struct super_block
*user_get_super(dev_t
, bool excl
);
120 void put_super(struct super_block
*sb
);
121 extern bool mount_capable(struct fs_context
*);
133 extern struct file
*do_filp_open(int dfd
, struct filename
*pathname
,
134 const struct open_flags
*op
);
135 extern struct file
*do_file_open_root(const struct path
*,
136 const char *, const struct open_flags
*);
137 extern struct open_how
build_open_how(int flags
, umode_t mode
);
138 extern int build_open_flags(const struct open_how
*how
, struct open_flags
*op
);
139 extern int __close_fd_get_file(unsigned int fd
, struct file
**res
);
141 long do_sys_ftruncate(unsigned int fd
, loff_t length
, int small
);
142 int chmod_common(const struct path
*path
, umode_t mode
);
143 int do_fchownat(int dfd
, const char __user
*filename
, uid_t user
, gid_t group
,
145 int chown_common(const struct path
*path
, uid_t user
, gid_t group
);
146 extern int vfs_open(const struct path
*, struct file
*);
151 extern long prune_icache_sb(struct super_block
*sb
, struct shrink_control
*sc
);
152 extern void inode_add_lru(struct inode
*inode
);
153 extern int dentry_needs_remove_privs(struct dentry
*dentry
);
158 extern long get_nr_dirty_inodes(void);
159 extern int invalidate_inodes(struct super_block
*, bool);
164 extern int d_set_mounted(struct dentry
*dentry
);
165 extern long prune_dcache_sb(struct super_block
*sb
, struct shrink_control
*sc
);
166 extern struct dentry
*d_alloc_cursor(struct dentry
*);
167 extern struct dentry
* d_alloc_pseudo(struct super_block
*, const struct qstr
*);
168 extern char *simple_dname(struct dentry
*, char *, int);
169 extern void dput_to_list(struct dentry
*, struct list_head
*);
170 extern void shrink_dentry_list(struct list_head
*);
175 extern int rw_verify_area(int, struct file
*, const loff_t
*, size_t);
180 extern const struct file_operations pipefifo_fops
;
185 extern void group_pin_kill(struct hlist_head
*p
);
186 extern void mnt_pin_kill(struct mount
*m
);
191 extern const struct dentry_operations ns_dentry_operations
;
194 int sb_init_dio_done_wq(struct super_block
*sb
);
199 int do_statx(int dfd
, const char __user
*filename
, unsigned flags
,
200 unsigned int mask
, struct statx __user
*buffer
);
205 long splice_file_to_pipe(struct file
*in
,
206 struct pipe_inode_info
*opipe
,
208 size_t len
, unsigned int flags
);