tree 71f690eef5012f3d3c5df2723cc776701d57dc84
parent c851c49591ebf000c610711e39eea7da5ff05b21
author Alex Elder <elder@inktank.com> 1363288146 -0500
committer Sage Weil <sage@inktank.com> 1367468309 -0700

libceph: move cursor into message

A message will only be processing a single data item at a time, so
there's no need for each data item to have its own cursor.

Move the cursor embedded in the message data structure into the
message itself.  To minimize the impact, keep the data->cursor
field, but make it be a pointer to the cursor in the message.

Move the definition of ceph_msg_data above ceph_msg_data_cursor so
the cursor can point to the data without a forward definition rather
than vice-versa.

This and the upcoming patches are part of:
    http://tracker.ceph.com/issues/3761

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