rpc-clnt: Check for transport object during rpc connection cleanup

While doing glfs_fini(), all the xlators are first notified of
PARENT_DOWN. protocol-client xlator on receving that notification
does rpc_clnt_disable which disassociates rpc->conn with its
transport object and does socket shutdown. So any further references
to conn->trans should not happen during rpc connection cleanup which
is done mainly as part of epoll event handling of EPOLLERR/EPOLLHUP.

This is a backport of the below fix-
 http://review.gluster.org/#/c/11845/

BUG: 1254607
Change-Id: I619ec00fd061f77c9b04dfa6fd139620cb44189b
Signed-off-by: Soumya Koduri <skoduri@redhat.com>
Reviewed-on: http://review.gluster.org/11845
Reviewed-by: Raghavendra G <rgowdapp@redhat.com>
Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>
Reviewed-on: http://review.gluster.org/11953
Tested-by: NetBSD Build System <jenkins@build.gluster.org>

0 files changed, 0 insertions, 0 deletions