svcrdma: Drop connection after an RDMA Read error

commit 197115ebf358cb440c73e868b2a0a5ef728decc6 upstream.

When an RPC Call message cannot be pulled from the client, that
is a message loss, by definition. Close the connection to trigger
the client to resend.

Cc: <stable@vger.kernel.org>
Reviewed-by: Tom Talpey <tom@talpey.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
index 6da6608..b2dd01e 100644 (file)
--- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
@@ -857,7 +857,8 @@ out_readfail:
        if (ret == -EINVAL)
                svc_rdma_send_error(rdma_xprt, ctxt, ret);
        svc_rdma_recv_ctxt_put(rdma_xprt, ctxt);
-       return ret;
+       svc_xprt_deferred_close(xprt);
+       return -ENOTCONN;
 
 out_backchannel:
        svc_rdma_handle_bc_reply(rqstp, ctxt);