tree 02f1e29fa6989be3e4de821af3ccf0a1ac6ba688
parent 4099287feb5833c24b5a91e1fe55207cf7559350
author Trond Myklebust <trond.myklebust@primarydata.com> 1436124418 -0400
committer Trond Myklebust <trond.myklebust@primarydata.com> 1436125818 -0400

NFSv4.1: Handle SEQ4_STATUS_BACKCHANNEL_FAULT correctly

RFC5661 states:

      The server has encountered an unrecoverable fault with the
      backchannel (e.g., it has lost track of the sequence ID for a slot
      in the backchannel).  The client MUST stop sending more requests
      on the session's fore channel, wait for all outstanding requests
      to complete on the fore and back channel, and then destroy the
      session.

Ensure we do so...

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>