tree 0f0895ab0291f7ddf2ccbcfbd77018eebce171d5
parent e40152ee1e1c7a63f4777791863215e3faa37a86
author Sage Weil <sage@newdream.net> 1273774746 -0700
committer Sage Weil <sage@newdream.net> 1274117144 -0700

ceph: clean up mds reply, error handling

We would occasionally BUG out in the reply handler because r_reply was
nonzero, due to a race with ceph_mdsc_do_request temporarily setting
r_reply to an ERR_PTR value.  This is unnecessary, messy, and also wrong
in the EIO case.

Clean up by consistently using r_err for errors and r_reply for messages.
Also fix the abort logic to trigger consistently for all errors that return
to the caller early (e.g., EIO from timeout case).  If an abort races with
a reply, use the result from the reply.

Also fix locking for r_err, r_reply update in the reply handler.

Signed-off-by: Sage Weil <sage@newdream.net>