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 void emergency_thaw_bdev(struct super_block *sb);
28 static inline void bdev_cache_init(void)
31 static inline int emergency_thaw_bdev(struct super_block *sb)
35 #endif /* CONFIG_BLOCK */
40 int __block_write_begin_int(struct folio *folio, loff_t pos, unsigned len,
41 get_block_t *get_block, const struct iomap *iomap);
46 extern void __init chrdev_init(void);
51 extern const struct fs_context_operations legacy_fs_context_ops;
52 extern int parse_monolithic_mount_data(struct fs_context *, void *);
53 extern void vfs_clean_context(struct fs_context *fc);
54 extern int finish_clean_context(struct fs_context *fc);
59 extern int filename_lookup(int dfd, struct filename *name, unsigned flags,
60 struct path *path, struct path *root);
61 extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
62 const char *, unsigned int, struct path *);
63 int do_rmdir(int dfd, struct filename *name);
64 int do_unlinkat(int dfd, struct filename *name);
65 int may_linkat(struct user_namespace *mnt_userns, struct path *link);
66 int do_renameat2(int olddfd, struct filename *oldname, int newdfd,
67 struct filename *newname, unsigned int flags);
68 int do_mkdirat(int dfd, struct filename *name, umode_t mode);
69 int do_symlinkat(struct filename *from, int newdfd, struct filename *to);
70 int do_linkat(int olddfd, struct filename *old, int newdfd,
71 struct filename *new, int flags);
76 extern struct vfsmount *lookup_mnt(const struct path *);
77 extern int finish_automount(struct vfsmount *, const struct path *);
79 extern int sb_prepare_remount_readonly(struct super_block *);
81 extern void __init mnt_init(void);
83 extern int __mnt_want_write_file(struct file *);
84 extern void __mnt_drop_write_file(struct file *);
86 extern void dissolve_on_fput(struct vfsmount *);
87 extern bool may_mount(void);
89 int path_mount(const char *dev_name, struct path *path,
90 const char *type_page, unsigned long flags, void *data_page);
91 int path_umount(struct path *path, int flags);
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 *);
104 static inline void put_file_access(struct file *file)
106 if ((file->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ) {
107 i_readcount_dec(file->f_inode);
108 } else if (file->f_mode & FMODE_WRITER) {
109 put_write_access(file->f_inode);
110 __mnt_drop_write(file->f_path.mnt);
117 extern int reconfigure_super(struct fs_context *);
118 extern bool trylock_super(struct super_block *sb);
119 struct super_block *user_get_super(dev_t, bool excl);
120 void put_super(struct super_block *sb);
121 extern bool mount_capable(struct fs_context *);
133 extern struct file *do_filp_open(int dfd, struct filename *pathname,
134 const struct open_flags *op);
135 extern struct file *do_file_open_root(const struct path *,
136 const char *, const struct open_flags *);
137 extern struct open_how build_open_how(int flags, umode_t mode);
138 extern int build_open_flags(const struct open_how *how, struct open_flags *op);
139 extern struct file *__close_fd_get_file(unsigned int fd);
141 long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
142 int chmod_common(const struct path *path, umode_t mode);
143 int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
145 int chown_common(const struct path *path, uid_t user, gid_t group);
146 extern int vfs_open(const struct path *, struct file *);
151 extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
152 extern int dentry_needs_remove_privs(struct dentry *dentry);
157 extern long get_nr_dirty_inodes(void);
158 extern int invalidate_inodes(struct super_block *, bool);
163 extern int d_set_mounted(struct dentry *dentry);
164 extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
165 extern struct dentry *d_alloc_cursor(struct dentry *);
166 extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *);
167 extern char *simple_dname(struct dentry *, char *, int);
168 extern void dput_to_list(struct dentry *, struct list_head *);
169 extern void shrink_dentry_list(struct list_head *);
174 extern const struct file_operations pipefifo_fops;
179 extern void group_pin_kill(struct hlist_head *p);
180 extern void mnt_pin_kill(struct mount *m);
185 extern const struct dentry_operations ns_dentry_operations;
188 int sb_init_dio_done_wq(struct super_block *sb);
194 int getname_statx_lookup_flags(int flags);
195 int do_statx(int dfd, struct filename *filename, unsigned int 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);
210 char name[XATTR_NAME_MAX + 1];
214 /* Value of attribute */
216 const void __user *cvalue;
222 struct xattr_name *kname;
227 ssize_t do_getxattr(struct user_namespace *mnt_userns,
229 struct xattr_ctx *ctx);
231 int setxattr_copy(const char __user *name, struct xattr_ctx *ctx);
232 int do_setxattr(struct user_namespace *mnt_userns, struct dentry *dentry,
233 struct xattr_ctx *ctx);