svcrdma: Drop connection after an RDMA Read error

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>

diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
index 85c8bcaebb80f1b22e70d717b8f3f9e9e5b9989e..3b05f90a3e50dd80c678b76b9198bdac6341b921 100644 (file)
--- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
@@ -852,7 +852,8 @@ 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);