root/mediatomb/sources/inotify.h

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initial mediatomb checkin

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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 */
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