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0eeca283 RL |
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 */ | |
89204c40 | 38 | #define IN_MOVE_SELF 0x00000800 /* Self was moved */ |
0eeca283 RL |
39 | |
40 | /* the following are legal events. they are sent as needed to any watch */ | |
41 | #define IN_UNMOUNT 0x00002000 /* Backing fs was unmounted */ | |
42 | #define IN_Q_OVERFLOW 0x00004000 /* Event queued overflowed */ | |
43 | #define IN_IGNORED 0x00008000 /* File was ignored */ | |
44 | ||
45 | /* helper events */ | |
46 | #define IN_CLOSE (IN_CLOSE_WRITE | IN_CLOSE_NOWRITE) /* close */ | |
47 | #define IN_MOVE (IN_MOVED_FROM | IN_MOVED_TO) /* moves */ | |
48 | ||
49 | /* special flags */ | |
8140a500 JM |
50 | #define IN_ONLYDIR 0x01000000 /* only watch the path if it is a directory */ |
51 | #define IN_DONT_FOLLOW 0x02000000 /* don't follow a sym link */ | |
7ea6040b | 52 | #define IN_MASK_ADD 0x20000000 /* add to the mask of an already existing watch */ |
0eeca283 RL |
53 | #define IN_ISDIR 0x40000000 /* event occurred against dir */ |
54 | #define IN_ONESHOT 0x80000000 /* only send event once */ | |
55 | ||
56 | /* | |
57 | * All of the events - we build the list by hand so that we can add flags in | |
58 | * the future and not break backward compatibility. Apps will get only the | |
59 | * events that they originally wanted. Be sure to add new events here! | |
60 | */ | |
61 | #define IN_ALL_EVENTS (IN_ACCESS | IN_MODIFY | IN_ATTRIB | IN_CLOSE_WRITE | \ | |
62 | IN_CLOSE_NOWRITE | IN_OPEN | IN_MOVED_FROM | \ | |
89204c40 JM |
63 | IN_MOVED_TO | IN_DELETE | IN_CREATE | IN_DELETE_SELF | \ |
64 | IN_MOVE_SELF) | |
0eeca283 RL |
65 | |
66 | #ifdef __KERNEL__ | |
67 | ||
68 | #include <linux/dcache.h> | |
69 | #include <linux/fs.h> | |
70 | #include <linux/config.h> | |
71 | ||
72 | #ifdef CONFIG_INOTIFY | |
73 | ||
74 | extern void inotify_inode_queue_event(struct inode *, __u32, __u32, | |
75 | const char *); | |
76 | extern void inotify_dentry_parent_queue_event(struct dentry *, __u32, __u32, | |
77 | const char *); | |
78 | extern void inotify_unmount_inodes(struct list_head *); | |
79 | extern void inotify_inode_is_dead(struct inode *); | |
80 | extern u32 inotify_get_cookie(void); | |
81 | ||
82 | #else | |
83 | ||
84 | static inline void inotify_inode_queue_event(struct inode *inode, | |
85 | __u32 mask, __u32 cookie, | |
86 | const char *filename) | |
87 | { | |
88 | } | |
89 | ||
90 | static inline void inotify_dentry_parent_queue_event(struct dentry *dentry, | |
91 | __u32 mask, __u32 cookie, | |
92 | const char *filename) | |
93 | { | |
94 | } | |
95 | ||
96 | static inline void inotify_unmount_inodes(struct list_head *list) | |
97 | { | |
98 | } | |
99 | ||
100 | static inline void inotify_inode_is_dead(struct inode *inode) | |
101 | { | |
102 | } | |
103 | ||
104 | static inline u32 inotify_get_cookie(void) | |
105 | { | |
106 | return 0; | |
107 | } | |
108 | ||
109 | #endif /* CONFIG_INOTIFY */ | |
110 | ||
111 | #endif /* __KERNEL __ */ | |
112 | ||
113 | #endif /* _LINUX_INOTIFY_H */ |