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 emergency_thaw_bdev(struct super_block
*sb
);
29 static inline void bdev_cache_init(void)
33 static inline int __sync_blockdev(struct block_device
*bdev
, int wait
)
37 static inline int emergency_thaw_bdev(struct super_block
*sb
)
41 #endif /* CONFIG_BLOCK */
46 int __block_write_begin_int(struct page
*page
, loff_t pos
, unsigned len
,
47 get_block_t
*get_block
, const struct iomap
*iomap
);
52 extern void __init
chrdev_init(void);
57 extern const struct fs_context_operations legacy_fs_context_ops
;
58 extern int parse_monolithic_mount_data(struct fs_context
*, void *);
59 extern void vfs_clean_context(struct fs_context
*fc
);
60 extern int finish_clean_context(struct fs_context
*fc
);
65 extern int filename_lookup(int dfd
, struct filename
*name
, unsigned flags
,
66 struct path
*path
, struct path
*root
);
67 extern int vfs_path_lookup(struct dentry
*, struct vfsmount
*,
68 const char *, unsigned int, struct path
*);
69 int do_rmdir(int dfd
, struct filename
*name
);
70 int do_unlinkat(int dfd
, struct filename
*name
);
71 int may_linkat(struct user_namespace
*mnt_userns
, struct path
*link
);
72 int do_renameat2(int olddfd
, struct filename
*oldname
, int newdfd
,
73 struct filename
*newname
, unsigned int flags
);
74 int do_mkdirat(int dfd
, struct filename
*name
, umode_t mode
);
75 int do_symlinkat(struct filename
*from
, int newdfd
, struct filename
*to
);
76 int do_linkat(int olddfd
, struct filename
*old
, int newdfd
,
77 struct filename
*new, int flags
);
82 extern struct vfsmount
*lookup_mnt(const struct path
*);
83 extern int finish_automount(struct vfsmount
*, struct path
*);
85 extern int sb_prepare_remount_readonly(struct super_block
*);
87 extern void __init
mnt_init(void);
89 extern int __mnt_want_write_file(struct file
*);
90 extern void __mnt_drop_write_file(struct file
*);
92 extern void dissolve_on_fput(struct vfsmount
*);
94 int path_mount(const char *dev_name
, struct path
*path
,
95 const char *type_page
, unsigned long flags
, void *data_page
);
96 int path_umount(struct path
*path
, int flags
);
101 extern void chroot_fs_refs(const struct path
*, const struct path
*);
106 extern struct file
*alloc_empty_file(int, const struct cred
*);
107 extern struct file
*alloc_empty_file_noaccount(int, const struct cred
*);
112 extern int reconfigure_super(struct fs_context
*);
113 extern bool trylock_super(struct super_block
*sb
);
114 struct super_block
*user_get_super(dev_t
, bool excl
);
115 void put_super(struct super_block
*sb
);
116 extern bool mount_capable(struct fs_context
*);
128 extern struct file
*do_filp_open(int dfd
, struct filename
*pathname
,
129 const struct open_flags
*op
);
130 extern struct file
*do_file_open_root(const struct path
*,
131 const char *, const struct open_flags
*);
132 extern struct open_how
build_open_how(int flags
, umode_t mode
);
133 extern int build_open_flags(const struct open_how
*how
, struct open_flags
*op
);
134 extern int __close_fd_get_file(unsigned int fd
, struct file
**res
);
136 long do_sys_ftruncate(unsigned int fd
, loff_t length
, int small
);
137 int chmod_common(const struct path
*path
, umode_t mode
);
138 int do_fchownat(int dfd
, const char __user
*filename
, uid_t user
, gid_t group
,
140 int chown_common(const struct path
*path
, uid_t user
, gid_t group
);
141 extern int vfs_open(const struct path
*, struct file
*);
146 extern long prune_icache_sb(struct super_block
*sb
, struct shrink_control
*sc
);
147 extern void inode_add_lru(struct inode
*inode
);
148 extern int dentry_needs_remove_privs(struct dentry
*dentry
);
153 extern long get_nr_dirty_inodes(void);
154 extern int invalidate_inodes(struct super_block
*, bool);
159 extern int d_set_mounted(struct dentry
*dentry
);
160 extern long prune_dcache_sb(struct super_block
*sb
, struct shrink_control
*sc
);
161 extern struct dentry
*d_alloc_cursor(struct dentry
*);
162 extern struct dentry
* d_alloc_pseudo(struct super_block
*, const struct qstr
*);
163 extern char *simple_dname(struct dentry
*, char *, int);
164 extern void dput_to_list(struct dentry
*, struct list_head
*);
165 extern void shrink_dentry_list(struct list_head
*);
170 extern int rw_verify_area(int, struct file
*, const loff_t
*, size_t);
175 extern const struct file_operations pipefifo_fops
;
180 extern void group_pin_kill(struct hlist_head
*p
);
181 extern void mnt_pin_kill(struct mount
*m
);
186 extern const struct dentry_operations ns_dentry_operations
;
189 int sb_init_dio_done_wq(struct super_block
*sb
);
194 int do_statx(int dfd
, const char __user
*filename
, unsigned flags
,
195 unsigned int mask
, struct statx __user
*buffer
);
200 long splice_file_to_pipe(struct file
*in
,
201 struct pipe_inode_info
*opipe
,
203 size_t len
, unsigned int flags
);