• Ilya Dryomov's avatar
    libceph, rbd: ceph_osd_linger_request, watch/notify v2 · 922dab61
    Ilya Dryomov authored
    This adds support and switches rbd to a new, more reliable version of
    watch/notify protocol.  As with the OSD client update, this is mostly
    about getting the right structures linked into the right places so that
    reconnects are properly sent when needed.  watch/notify v2 also
    requires sending regular pings to the OSDs - send_linger_ping().
    
    A major change from the old watch/notify implementation is the
    introduction of ceph_osd_linger_request - linger requests no longer
    piggy back on ceph_osd_request.  ceph_osd_event has been merged into
    ceph_osd_linger_request.
    
    All the details are now hidden within libceph, the interface consists
    of a simple pair of watch/unwatch functions and ceph_osdc_notify_ack().
    ceph_osdc_watch() does return ceph_osd_linger_request, but only to keep
    the lifetime management simple.
    
    ceph_osdc_notify_ack() accepts an optional data payload, which is
    relayed back to the notifier.
    
    Portions of this patch are loosely based on work by Douglas Fuller
    <dfuller@redhat.com> and Mike Christie <michaelc@cs.wisc.edu>.
    Signed-off-by: default avatarIlya Dryomov <idryomov@gmail.com>
    922dab61
ceph_strings.c 1.13 KB