• Eric Paris's avatar
    fsnotify: allow marks to not pin inodes in core · 90b1e7a5
    Eric Paris authored
    inotify marks must pin inodes in core.  dnotify doesn't technically need to
    since they are closed when the directory is closed.  fanotify also need to
    pin inodes in core as it works today.  But the next step is to introduce
    the concept of 'ignored masks' which is actually a mask of events for an
    inode of no interest.  I claim that these should be liberally sent to the
    kernel and should not pin the inode in core.  If the inode is brought back
    in the listener will get an event it may have thought excluded, but this is
    not a serious situation and one any listener should deal with.
    This patch lays the ground work for non-pinning inode marks by using lazy
    inode pinning.  We do not pin a mark until it has a non-zero mask entry.  If a
    listener new sets a mask we never pin the inode.
    Signed-off-by: default avatarEric Paris <eparis@redhat.com>
fanotify_user.c 13.7 KB