include/linux/dnotify.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef _LINUX_DNOTIFY_H
0003 #define _LINUX_DNOTIFY_H
0004 /*
0005  * Directory notification for Linux
0006  *
0007  * Copyright (C) 2000,2002 Stephen Rothwell
0008  */
0009
0010 #include <linux/fs.h>
0011
0012 struct dnotify_struct {
0013     struct dnotify_struct * dn_next;
0014     __u32           dn_mask;
0015     int         dn_fd;
0016     struct file *       dn_filp;
0017     fl_owner_t      dn_owner;
0018 };
0019
0020 #ifdef __KERNEL__
0021
0022
0023 #ifdef CONFIG_DNOTIFY
0024
0025 #define DNOTIFY_ALL_EVENTS (FS_DELETE | FS_DELETE_CHILD |\
0026                 FS_MODIFY | FS_MODIFY_CHILD |\
0027                 FS_ACCESS | FS_ACCESS_CHILD |\
0028                 FS_ATTRIB | FS_ATTRIB_CHILD |\
0029                 FS_CREATE | FS_RENAME |\
0030                 FS_MOVED_FROM | FS_MOVED_TO)
0031
0032 extern void dnotify_flush(struct file *, fl_owner_t);
0033 extern int fcntl_dirnotify(int, struct file *, unsigned long);
0034
0035 #else
0036
0037 static inline void dnotify_flush(struct file *filp, fl_owner_t id)
0038 {
0039 }
0040
0041 static inline int fcntl_dirnotify(int fd, struct file *filp, unsigned long arg)
0042 {
0043     return -EINVAL;
0044 }
0045
0046 #endif /* CONFIG_DNOTIFY */
0047
0048 #endif /* __KERNEL __ */
0049
0050 #endif /* _LINUX_DNOTIFY_H */