1/* 2 * Inode based directory notification for Linux 3 * 4 * Copyright (C) 2005 John McCutchan 5 */ 6 7#ifndef _LINUX_INOTIFY_H 8#define _LINUX_INOTIFY_H 9 10#include <linux/types.h> 11 12/* 13 * struct inotify_event - structure read from the inotify device for each event 14 * 15 * When you are watching a directory, you will receive the filename for events 16 * such as IN_CREATE, IN_DELETE, IN_OPEN, IN_CLOSE, ..., relative to the wd. 17 */ 18struct inotify_event { 19 __s32 wd; /* watch descriptor */ 20 __u32 mask; /* watch mask */ 21 __u32 cookie; /* cookie to synchronize two events */ 22 __u32 len; /* length (including nulls) of name */ 23 char name[0]; /* stub for possible name */ 24}; 25 26/* the following are legal, implemented events that user-space can watch for */ 27#define IN_ACCESS 0x00000001 /* File was accessed */ 28#define IN_MODIFY 0x00000002 /* File was modified */ 29#define IN_ATTRIB 0x00000004 /* Metadata changed */ 30#define IN_CLOSE_WRITE 0x00000008 /* Writtable file was closed */ 31#define IN_CLOSE_NOWRITE 0x00000010 /* Unwrittable file closed */ 32#define IN_OPEN 0x00000020 /* File was opened */ 33#define IN_MOVED_FROM 0x00000040 /* File was moved from X */ 34#define IN_MOVED_TO 0x00000080 /* File was moved to Y */ 35#define IN_CREATE 0x00000100 /* Subfile was created */ 36#define IN_DELETE 0x00000200 /* Subfile was deleted */ 37#define IN_DELETE_SELF 0x00000400 /* Self was deleted */ 38 39/* the following are legal events. they are sent as needed to any watch */ 40#define IN_UNMOUNT 0x00002000 /* Backing fs was unmounted */ 41#define IN_Q_OVERFLOW 0x00004000 /* Event queued overflowed */ 42#define IN_IGNORED 0x00008000 /* File was ignored */ 43 44/* helper events */ 45#define IN_CLOSE (IN_CLOSE_WRITE | IN_CLOSE_NOWRITE) /* close */ 46#define IN_MOVE (IN_MOVED_FROM | IN_MOVED_TO) /* moves */ 47 48/* special flags */ 49#define IN_ISDIR 0x40000000 /* event occurred against dir */ 50#define IN_ONESHOT 0x80000000 /* only send event once */ 51 52/* 53 * All of the events - we build the list by hand so that we can add flags in 54 * the future and not break backward compatibility. Apps will get only the 55 * events that they originally wanted. Be sure to add new events here! 56 */ 57#define IN_ALL_EVENTS (IN_ACCESS | IN_MODIFY | IN_ATTRIB | IN_CLOSE_WRITE | \ 58 IN_CLOSE_NOWRITE | IN_OPEN | IN_MOVED_FROM | \ 59 IN_MOVED_TO | IN_DELETE | IN_CREATE | IN_DELETE_SELF) 60 61#ifdef __KERNEL__ 62 63#include <linux/dcache.h> 64#include <linux/fs.h> 65#include <linux/config.h> 66 67#ifdef CONFIG_INOTIFY 68 69extern void inotify_inode_queue_event(struct inode *, __u32, __u32, 70 const char *); 71extern void inotify_dentry_parent_queue_event(struct dentry *, __u32, __u32, 72 const char *); 73extern void inotify_unmount_inodes(struct list_head *); 74extern void inotify_inode_is_dead(struct inode *); 75extern u32 inotify_get_cookie(void); 76 77#else 78 79static inline void inotify_inode_queue_event(struct inode *inode, 80 __u32 mask, __u32 cookie, 81 const char *filename) 82{ 83} 84 85static inline void inotify_dentry_parent_queue_event(struct dentry *dentry, 86 __u32 mask, __u32 cookie, 87 const char *filename) 88{ 89} 90 91static inline void inotify_unmount_inodes(struct list_head *list) 92{ 93} 94 95static inline void inotify_inode_is_dead(struct inode *inode) 96{ 97} 98 99static inline u32 inotify_get_cookie(void) 100{ 101 return 0; 102} 103 104#endif /* CONFIG_INOTIFY */ 105 106#endif /* __KERNEL __ */ 107 108#endif /* _LINUX_INOTIFY_H */ 109