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;
25 extern void __init bdev_cache_init(void);
27 void emergency_thaw_bdev(struct super_block *sb);
29 static inline void bdev_cache_init(void)
32 static inline int emergency_thaw_bdev(struct super_block *sb)
36 #endif /* CONFIG_BLOCK */
41 int __block_write_begin_int(struct folio *folio, loff_t pos, unsigned len,
42 get_block_t *get_block, const 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 vfs_clean_context(struct fs_context *fc);
55 extern int finish_clean_context(struct fs_context *fc);
60 extern int filename_lookup(int dfd, struct filename *name, unsigned flags,
61 struct path *path, struct path *root);
62 extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
63 const char *, unsigned int, struct path *);
64 int do_rmdir(int dfd, struct filename *name);
65 int do_unlinkat(int dfd, struct filename *name);
66 int may_linkat(struct user_namespace *mnt_userns, struct path *link);
67 int do_renameat2(int olddfd, struct filename *oldname, int newdfd,
68 struct filename *newname, unsigned int flags);
69 int do_mkdirat(int dfd, struct filename *name, umode_t mode);
70 int do_symlinkat(struct filename *from, int newdfd, struct filename *to);
71 int do_linkat(int olddfd, struct filename *old, int newdfd,
72 struct filename *new, int flags);
77 extern struct vfsmount *lookup_mnt(const struct path *);
78 extern int finish_automount(struct vfsmount *, const struct path *);
80 extern int sb_prepare_remount_readonly(struct super_block *);
82 extern void __init mnt_init(void);
84 extern int __mnt_want_write_file(struct file *);
85 extern void __mnt_drop_write_file(struct file *);
87 extern void dissolve_on_fput(struct vfsmount *);
88 extern bool may_mount(void);
90 int path_mount(const char *dev_name, struct path *path,
91 const char *type_page, unsigned long flags, void *data_page);
92 int path_umount(struct path *path, int flags);
97 extern void chroot_fs_refs(const struct path *, const struct path *);
102 extern struct file *alloc_empty_file(int, const struct cred *);
103 extern struct file *alloc_empty_file_noaccount(int, const struct cred *);
108 extern int reconfigure_super(struct fs_context *);
109 extern bool trylock_super(struct super_block *sb);
110 struct super_block *user_get_super(dev_t, bool excl);
111 void put_super(struct super_block *sb);
112 extern bool mount_capable(struct fs_context *);
124 extern struct file *do_filp_open(int dfd, struct filename *pathname,
125 const struct open_flags *op);
126 extern struct file *do_file_open_root(const struct path *,
127 const char *, const struct open_flags *);
128 extern struct open_how build_open_how(int flags, umode_t mode);
129 extern int build_open_flags(const struct open_how *how, struct open_flags *op);
130 extern struct file *__close_fd_get_file(unsigned int fd);
132 long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
133 int chmod_common(const struct path *path, umode_t mode);
134 int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
136 int chown_common(const struct path *path, uid_t user, gid_t group);
137 extern int vfs_open(const struct path *, struct file *);
142 extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
143 extern int dentry_needs_remove_privs(struct dentry *dentry);
148 extern long get_nr_dirty_inodes(void);
149 extern int invalidate_inodes(struct super_block *, bool);
154 extern int d_set_mounted(struct dentry *dentry);
155 extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
156 extern struct dentry *d_alloc_cursor(struct dentry *);
157 extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *);
158 extern char *simple_dname(struct dentry *, char *, int);
159 extern void dput_to_list(struct dentry *, struct list_head *);
160 extern void shrink_dentry_list(struct list_head *);
165 extern const struct file_operations pipefifo_fops;
170 extern void group_pin_kill(struct hlist_head *p);
171 extern void mnt_pin_kill(struct mount *m);
176 extern const struct dentry_operations ns_dentry_operations;
179 int sb_init_dio_done_wq(struct super_block *sb);
185 int getname_statx_lookup_flags(int flags);
186 int do_statx(int dfd, struct filename *filename, unsigned int flags,
187 unsigned int mask, struct statx __user *buffer);
192 long splice_file_to_pipe(struct file *in,
193 struct pipe_inode_info *opipe,
195 size_t len, unsigned int flags);
201 char name[XATTR_NAME_MAX + 1];
205 /* Value of attribute */
207 const void __user *cvalue;
213 struct xattr_name *kname;
218 ssize_t do_getxattr(struct user_namespace *mnt_userns,
220 struct xattr_ctx *ctx);
222 int setxattr_copy(const char __user *name, struct xattr_ctx *ctx);
223 int do_setxattr(struct user_namespace *mnt_userns, struct dentry *dentry,
224 struct xattr_ctx *ctx);
226 ssize_t __kernel_write_iter(struct file *file, struct iov_iter *from, loff_t *pos);