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Subject[2.6.16-rc5-m3 PATCH] inotify: add the monitor for the event source
Current inotify implementation only focus on change of file system, but it doesn't
know who results in this change, this patch adds three fields to struct inotify_event,
tgid, uid and gid, they will save process ID, user ID and user group ID of the process
which leads to change in the file system, such software as anti-virus can make use
of this feature to monitor who is modifying a specific file.

Signed-off-by: Yi Yang <yang.y.yi@gmail.com>
--- a/include/linux/inotify.h.orig 2006-03-08 21:40:12.000000000 +0800
+++ b/include/linux/inotify.h 2006-03-08 23:51:54.000000000 +0800
@@ -19,6 +19,9 @@ struct inotify_event {
__s32 wd; /* watch descriptor */
__u32 mask; /* watch mask */
__u32 cookie; /* cookie to synchronize two events */
+ __u32 tgid; /* process ID of the event source */
+ __u32 uid; /* user ID of the responding process */
+ __u32 gid; /* group ID of the responding process */
__u32 len; /* length (including nulls) of name */
char name[0]; /* stub for possible name */
};
--- a/fs/inotify.c.orig 2006-03-08 20:58:31.000000000 +0800
+++ b/fs/inotify.c 2006-03-09 00:05:47.000000000 +0800
@@ -219,6 +219,9 @@ static struct inotify_kernel_event * ker
kevent->event.wd = wd;
kevent->event.mask = mask;
kevent->event.cookie = cookie;
+ kevent->event.tgid = current->tgid;
+ kevent->event.uid = current->uid;
+ kevent->event.gid = current->gid;

INIT_LIST_HEAD(&kevent->list);


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