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;
23 extern void __init bdev_cache_init(void);
25 extern int __sync_blockdev(struct block_device *bdev, int wait);
26 void iterate_bdevs(void (*)(struct block_device *, void *), void *);
27 void emergency_thaw_bdev(struct super_block *sb);
28 void bd_forget(struct inode *inode);
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 static inline void bd_forget(struct inode *inode)
49 #endif /* CONFIG_BLOCK */
54 extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
55 get_block_t *get_block, struct iomap *iomap);
60 extern void __init chrdev_init(void);
65 extern const struct fs_context_operations legacy_fs_context_ops;
66 extern int parse_monolithic_mount_data(struct fs_context *, void *);
67 extern void vfs_clean_context(struct fs_context *fc);
68 extern int finish_clean_context(struct fs_context *fc);
73 extern int filename_lookup(int dfd, struct filename *name, unsigned flags,
74 struct path *path, struct path *root);
75 extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
76 const char *, unsigned int, struct path *);
77 long do_rmdir(int dfd, struct filename *name);
78 long do_unlinkat(int dfd, struct filename *name);
79 int may_linkat(struct path *link);
84 extern struct vfsmount *lookup_mnt(const struct path *);
85 extern int finish_automount(struct vfsmount *, struct path *);
87 extern int sb_prepare_remount_readonly(struct super_block *);
89 extern void __init mnt_init(void);
91 extern int __mnt_want_write_file(struct file *);
92 extern void __mnt_drop_write_file(struct file *);
94 extern void dissolve_on_fput(struct vfsmount *);
96 int path_mount(const char *dev_name, struct path *path,
97 const char *type_page, unsigned long flags, void *data_page);
98 int path_umount(struct path *path, int flags);
103 extern void chroot_fs_refs(const struct path *, const struct path *);
108 extern struct file *alloc_empty_file(int, const struct cred *);
109 extern struct file *alloc_empty_file_noaccount(int, const struct cred *);
114 extern int reconfigure_super(struct fs_context *);
115 extern bool trylock_super(struct super_block *sb);
116 extern struct super_block *user_get_super(dev_t);
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(struct dentry *, struct vfsmount *,
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);
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);