diff options
| -rw-r--r-- | net/sunrpc/xprtrdma/svc_rdma_recvfrom.c | 43 |
1 files changed, 11 insertions, 32 deletions
diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c index 0c6aa8693f20..1e7381ff948b 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c +++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c @@ -305,35 +305,6 @@ err_free: return false; } -static int __svc_rdma_post_recv(struct svcxprt_rdma *rdma, - struct svc_rdma_recv_ctxt *ctxt) -{ - int ret; - - trace_svcrdma_post_recv(ctxt); - ret = ib_post_recv(rdma->sc_qp, &ctxt->rc_recv_wr, NULL); - if (ret) - goto err_post; - return 0; - -err_post: - trace_svcrdma_rq_post_err(rdma, ret); - svc_rdma_recv_ctxt_put(rdma, ctxt); - return ret; -} - -static int svc_rdma_post_recv(struct svcxprt_rdma *rdma) -{ - struct svc_rdma_recv_ctxt *ctxt; - - if (test_bit(XPT_CLOSE, &rdma->sc_xprt.xpt_flags)) - return 0; - ctxt = svc_rdma_recv_ctxt_get(rdma); - if (!ctxt) - return -ENOMEM; - return __svc_rdma_post_recv(rdma, ctxt); -} - /** * svc_rdma_post_recvs - Post initial set of Recv WRs * @rdma: fresh svcxprt_rdma @@ -364,8 +335,17 @@ static void svc_rdma_wc_receive(struct ib_cq *cq, struct ib_wc *wc) if (wc->status != IB_WC_SUCCESS) goto flushed; - if (svc_rdma_post_recv(rdma)) - goto post_err; + /* If receive posting fails, the connection is about to be + * lost anyway. The server will not be able to send a reply + * for this RPC, and the client will retransmit this RPC + * anyway when it reconnects. + * + * Therefore we drop the Receive, even if status was SUCCESS + * to reduce the likelihood of replayed requests once the + * client reconnects. + */ + if (!svc_rdma_refresh_recvs(rdma, 1, false)) + goto flushed; /* All wc fields are now known to be valid */ ctxt->rc_byte_len = wc->byte_len; @@ -380,7 +360,6 @@ static void svc_rdma_wc_receive(struct ib_cq *cq, struct ib_wc *wc) return; flushed: -post_err: svc_rdma_recv_ctxt_put(rdma, ctxt); set_bit(XPT_CLOSE, &rdma->sc_xprt.xpt_flags); svc_xprt_enqueue(&rdma->sc_xprt); |