| 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 |
*/ |
| 18 |
struct 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 |
|
| 69 |
extern void inotify_inode_queue_event(struct inode *, __u32, __u32, |
| 70 |
const char *); |
| 71 |
extern void inotify_dentry_parent_queue_event(struct dentry *, __u32, __u32, |
| 72 |
const char *); |
| 73 |
extern void inotify_unmount_inodes(struct list_head *); |
| 74 |
extern void inotify_inode_is_dead(struct inode *); |
| 75 |
extern u32 inotify_get_cookie(void); |
| 76 |
|
| 77 |
#else |
| 78 |
|
| 79 |
static inline void inotify_inode_queue_event(struct inode *inode, |
| 80 |
__u32 mask, __u32 cookie, |
| 81 |
const char *filename) |
| 82 |
{ |
| 83 |
} |
| 84 |
|
| 85 |
static inline void inotify_dentry_parent_queue_event(struct dentry *dentry, |
| 86 |
__u32 mask, __u32 cookie, |
| 87 |
const char *filename) |
| 88 |
{ |
| 89 |
} |
| 90 |
|
| 91 |
static inline void inotify_unmount_inodes(struct list_head *list) |
| 92 |
{ |
| 93 |
} |
| 94 |
|
| 95 |
static inline void inotify_inode_is_dead(struct inode *inode) |
| 96 |
{ |
| 97 |
} |
| 98 |
|
| 99 |
static 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 */ |
