From 32a4df13b88afef2a7d869bb7586a7beba90961f Mon Sep 17 00:00:00 2001 From: Eric Paris Date: Thu, 17 Dec 2009 21:24:33 -0500 Subject: fanotify: ignored_mask to ignore events When fanotify receives an event it will check event->mask & ~ignored_mask. If no bits are left the event will not be sent. Signed-off-by: Eric Paris --- fs/notify/fanotify/fanotify.c | 37 +++++++++++++++++++++++-------------- 1 file changed, 23 insertions(+), 14 deletions(-) diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c index f6900022f69..060b177146e 100644 --- a/fs/notify/fanotify/fanotify.c +++ b/fs/notify/fanotify/fanotify.c @@ -100,31 +100,39 @@ static int fanotify_handle_event(struct fsnotify_group *group, struct fsnotify_e } static bool should_send_vfsmount_event(struct fsnotify_group *group, struct vfsmount *mnt, - __u32 mask) + struct inode *inode, __u32 mask) { - struct fsnotify_mark *fsn_mark; - bool send; + struct fsnotify_mark *mnt_mark; + struct fsnotify_mark *inode_mark; pr_debug("%s: group=%p vfsmount=%p mask=%x\n", __func__, group, mnt, mask); - fsn_mark = fsnotify_find_vfsmount_mark(group, mnt); - if (!fsn_mark) + mnt_mark = fsnotify_find_vfsmount_mark(group, mnt); + if (!mnt_mark) return false; - send = (mask & fsn_mark->mask); + mask &= mnt_mark->mask; + mask &= ~mnt_mark->ignored_mask; + + if (mask) { + inode_mark = fsnotify_find_inode_mark(group, inode); + if (inode_mark) { + mask &= ~inode_mark->ignored_mask; + fsnotify_put_mark(inode_mark); + } + } /* find took a reference */ - fsnotify_put_mark(fsn_mark); + fsnotify_put_mark(mnt_mark); - return send; + return mask; } static bool should_send_inode_event(struct fsnotify_group *group, struct inode *inode, __u32 mask) { struct fsnotify_mark *fsn_mark; - bool send; pr_debug("%s: group=%p inode=%p mask=%x\n", __func__, group, inode, mask); @@ -137,20 +145,21 @@ static bool should_send_inode_event(struct fsnotify_group *group, struct inode * * events on the child, don't send it! */ if ((mask & FS_EVENT_ON_CHILD) && !(fsn_mark->mask & FS_EVENT_ON_CHILD)) { - send = false; + mask = 0; } else { /* * We care about children, but do we care about this particular * type of event? */ - mask = (mask & ~FS_EVENT_ON_CHILD); - send = (fsn_mark->mask & mask); + mask &= ~FS_EVENT_ON_CHILD; + mask &= fsn_mark->mask; + mask &= ~fsn_mark->ignored_mask; } /* find took a reference */ fsnotify_put_mark(fsn_mark); - return send; + return mask; } static bool fanotify_should_send_event(struct fsnotify_group *group, struct inode *to_tell, @@ -170,7 +179,7 @@ static bool fanotify_should_send_event(struct fsnotify_group *group, struct inod return false; if (mnt) - return should_send_vfsmount_event(group, mnt, mask); + return should_send_vfsmount_event(group, mnt, to_tell, mask); else return should_send_inode_event(group, to_tell, mask); } -- cgit v1.2.3-70-g09d2