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 extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
52 get_block_t *get_block, 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 long do_rmdir(int dfd, struct filename *name);
75 long 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);
83 extern struct vfsmount *lookup_mnt(const struct path *);
84 extern int finish_automount(struct vfsmount *, struct path *);
86 extern int sb_prepare_remount_readonly(struct super_block *);
88 extern void __init mnt_init(void);
90 extern int __mnt_want_write_file(struct file *);
91 extern void __mnt_drop_write_file(struct file *);
93 extern void dissolve_on_fput(struct vfsmount *);
95 int path_mount(const char *dev_name, struct path *path,
96 const char *type_page, unsigned long flags, void *data_page);
97 int path_umount(struct path *path, int flags);
102 extern void chroot_fs_refs(const struct path *, const struct path *);
107 extern struct file *alloc_empty_file(int, const struct cred *);
108 extern struct file *alloc_empty_file_noaccount(int, const struct cred *);
113 extern int reconfigure_super(struct fs_context *);
114 extern bool trylock_super(struct super_block *sb);
115 struct super_block *user_get_super(dev_t, bool excl);
116 void put_super(struct super_block *sb);
117 extern bool mount_capable(struct fs_context *);
129 extern struct file *do_filp_open(int dfd, struct filename *pathname,
130 const struct open_flags *op);
131 extern struct file *do_file_open_root(const struct path *,
132 const char *, const struct open_flags *);
133 extern struct open_how build_open_how(int flags, umode_t mode);
134 extern int build_open_flags(const struct open_how *how, struct open_flags *op);
135 extern int __close_fd_get_file(unsigned int fd, struct file **res);
137 long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
138 int chmod_common(const struct path *path, umode_t mode);
139 int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
141 int chown_common(const struct path *path, uid_t user, gid_t group);
142 extern int vfs_open(const struct path *, struct file *);
147 extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
148 extern void inode_add_lru(struct inode *inode);
149 extern int dentry_needs_remove_privs(struct dentry *dentry);
154 extern long get_nr_dirty_inodes(void);
155 extern int invalidate_inodes(struct super_block *, bool);
160 extern int d_set_mounted(struct dentry *dentry);
161 extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
162 extern struct dentry *d_alloc_cursor(struct dentry *);
163 extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *);
164 extern char *simple_dname(struct dentry *, char *, int);
165 extern void dput_to_list(struct dentry *, struct list_head *);
166 extern void shrink_dentry_list(struct list_head *);
171 extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
176 extern const struct file_operations pipefifo_fops;
181 extern void group_pin_kill(struct hlist_head *p);
182 extern void mnt_pin_kill(struct mount *m);
187 extern const struct dentry_operations ns_dentry_operations;
190 int sb_init_dio_done_wq(struct super_block *sb);
195 int do_statx(int dfd, const char __user *filename, unsigned flags,
196 unsigned int mask, struct statx __user *buffer);
201 long splice_file_to_pipe(struct file *in,
202 struct pipe_inode_info *opipe,
204 size_t len, unsigned int flags);