tree 59566142b9a177590c0d38eaaeb6edb7dd01fa8f
parent 7e2766a1135544a2972d2767f3a41afd5f55067f
author Alex Elder <elder@inktank.com> 1364230470 -0500
committer Sage Weil <sage@inktank.com> 1367468242 -0700

libceph: initialize data fields on last msg put

When the last reference to a ceph message is dropped,
ceph_msg_last_put() is called to clean things up.

For "normal" messages (allocated via ceph_msg_new() rather than
being allocated from a memory pool) it's sufficient to just release
resources.  But for a mempool-allocated message we actually have to
re-initialize the data fields in the message back to initial state
so they're ready to go in the event the message gets reused.

Some of this was already done; this fleshes it out so it's done
more completely.

This resolves:
    http://tracker.ceph.com/issues/4540

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>