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);
28 static inline void bdev_cache_init(void)
32 static inline int __sync_blockdev(struct block_device *bdev, int wait)
41 extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
42 get_block_t *get_block, struct iomap *iomap);
47 extern void __init chrdev_init(void);
52 extern const struct fs_context_operations legacy_fs_context_ops;
53 extern int parse_monolithic_mount_data(struct fs_context *, void *);
54 extern void fc_drop_locked(struct fs_context *);
55 extern void vfs_clean_context(struct fs_context *fc);
56 extern int finish_clean_context(struct fs_context *fc);
61 extern int filename_lookup(int dfd, struct filename *name, unsigned flags,
62 struct path *path, struct path *root);
63 extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
64 extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
65 const char *, unsigned int, struct path *);
66 long do_mknodat(int dfd, const char __user *filename, umode_t mode,
68 long do_mkdirat(int dfd, const char __user *pathname, umode_t mode);
69 long do_rmdir(int dfd, const char __user *pathname);
70 long do_unlinkat(int dfd, struct filename *name);
71 long do_symlinkat(const char __user *oldname, int newdfd,
72 const char __user *newname);
73 int do_linkat(int olddfd, const char __user *oldname, int newdfd,
74 const char __user *newname, int flags);
79 extern void *copy_mount_options(const void __user *);
80 extern char *copy_mount_string(const void __user *);
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 *);
96 extern void chroot_fs_refs(const struct path *, const struct path *);
101 extern struct file *alloc_empty_file(int, const struct cred *);
102 extern struct file *alloc_empty_file_noaccount(int, const struct cred *);
107 extern int reconfigure_super(struct fs_context *);
108 extern bool trylock_super(struct super_block *sb);
109 extern struct super_block *user_get_super(dev_t);
110 extern bool mount_capable(struct fs_context *);
122 extern struct file *do_filp_open(int dfd, struct filename *pathname,
123 const struct open_flags *op);
124 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
125 const char *, const struct open_flags *);
126 extern struct open_how build_open_how(int flags, umode_t mode);
127 extern int build_open_flags(const struct open_how *how, struct open_flags *op);
129 long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
130 long do_faccessat(int dfd, const char __user *filename, int mode);
131 int do_fchmodat(int dfd, const char __user *filename, umode_t mode);
132 int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
135 extern int vfs_open(const struct path *, struct file *);
140 extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
141 extern void inode_add_lru(struct inode *inode);
142 extern int dentry_needs_remove_privs(struct dentry *dentry);
147 extern void inode_io_list_del(struct inode *inode);
149 extern long get_nr_dirty_inodes(void);
150 extern int invalidate_inodes(struct super_block *, bool);
155 extern int d_set_mounted(struct dentry *dentry);
156 extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
157 extern struct dentry *d_alloc_cursor(struct dentry *);
158 extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *);
159 extern char *simple_dname(struct dentry *, char *, int);
160 extern void dput_to_list(struct dentry *, struct list_head *);
161 extern void shrink_dentry_list(struct list_head *);
166 extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
171 extern const struct file_operations pipefifo_fops;
176 extern void group_pin_kill(struct hlist_head *p);
177 extern void mnt_pin_kill(struct mount *m);
182 extern const struct dentry_operations ns_dentry_operations;
185 int sb_init_dio_done_wq(struct super_block *sb);
190 unsigned vfs_stat_set_lookup_flags(unsigned *lookup_flags, int flags);
191 int cp_statx(const struct kstat *stat, struct statx __user *buffer);