tree bfaaa512b4efa08bed800330f654ba9637dd2f58
parent 0272e1fd9f4fa8a43357c168e081744f99e67195
author J. Bruce Fields <bfields@citi.umich.edu> 1189601039 -0400
committer J. Bruce Fields <bfields@citi.umich.edu> 1191969117 -0400

knfsd: don't shutdown callbacks until nfsv4 client is freed

If a callback still holds a reference on the client, then it may be
about to perform an rpc call, so it isn't safe to call rpc_shutdown().
(Though rpc_shutdown() does wait for any outstanding rpc's, it can't
know if a new rpc is about to be issued with that client.)

So, wait to shutdown the rpc_client until the reference count on the
client has gone to zero.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>