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[68.40.189.247]) by smtp.gmail.com with ESMTPSA id r65sm3278223itb.19.2019.03.07.16.47.35 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 07 Mar 2019 16:47:35 -0800 (PST) From: Trond Myklebust X-Google-Original-From: Trond Myklebust To: linux-nfs@vger.kernel.org Subject: [PATCH v3 3/3] SUNRPC: Respect RPC call timeouts when retrying transmission Date: Thu, 7 Mar 2019 19:46:23 -0500 Message-Id: <20190308004623.10618-3-trond.myklebust@hammerspace.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190308004623.10618-2-trond.myklebust@hammerspace.com> References: <20190308004623.10618-1-trond.myklebust@hammerspace.com> <20190308004623.10618-2-trond.myklebust@hammerspace.com> MIME-Version: 1.0 Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Fix a regression where soft and softconn requests are not timing out as expected. Fixes: 89f90fe1ad8b ("SUNRPC: Allow calls to xprt_transmit() to drain...") Signed-off-by: Trond Myklebust --- net/sunrpc/clnt.c | 42 ++++++++++++++++++++++++------------------ 1 file changed, 24 insertions(+), 18 deletions(-) diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index b9558e10c6c1..311029b7c33a 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -79,6 +79,7 @@ static int rpc_encode_header(struct rpc_task *task, static int rpc_decode_header(struct rpc_task *task, struct xdr_stream *xdr); static int rpc_ping(struct rpc_clnt *clnt); +static void rpc_check_timeout(struct rpc_task *task); static void rpc_register_client(struct rpc_clnt *clnt) { @@ -1962,8 +1963,7 @@ call_connect_status(struct rpc_task *task) break; if (clnt->cl_autobind) { rpc_force_rebind(clnt); - task->tk_action = call_bind; - return; + goto out_retry; } /* fall through */ case -ECONNRESET: @@ -1983,16 +1983,19 @@ call_connect_status(struct rpc_task *task) /* fall through */ case -ENOTCONN: case -EAGAIN: - /* Check for timeouts before looping back to call_bind */ case -ETIMEDOUT: - task->tk_action = call_timeout; - return; + goto out_retry; case 0: clnt->cl_stats->netreconn++; task->tk_action = call_transmit; return; } rpc_exit(task, status); + return; +out_retry: + /* Check for timeouts before looping back to call_bind */ + task->tk_action = call_bind; + rpc_check_timeout(task); } /* @@ -2069,7 +2072,7 @@ call_transmit_status(struct rpc_task *task) trace_xprt_ping(task->tk_xprt, task->tk_status); rpc_exit(task, task->tk_status); - break; + return; } /* fall through */ case -ECONNRESET: @@ -2081,6 +2084,7 @@ call_transmit_status(struct rpc_task *task) task->tk_status = 0; break; } + rpc_check_timeout(task); } #if defined(CONFIG_SUNRPC_BACKCHANNEL) @@ -2217,7 +2221,7 @@ call_status(struct rpc_task *task) case -EPIPE: case -ENOTCONN: case -EAGAIN: - task->tk_action = call_encode; + task->tk_action = call_timeout; break; case -EIO: /* shutdown or soft timeout */ @@ -2231,20 +2235,13 @@ call_status(struct rpc_task *task) } } -/* - * 6a. Handle RPC timeout - * We do not release the request slot, so we keep using the - * same XID for all retransmits. - */ static void -call_timeout(struct rpc_task *task) +rpc_check_timeout(struct rpc_task *task) { struct rpc_clnt *clnt = task->tk_client; - if (xprt_adjust_timeout(task->tk_rqstp) == 0) { - dprintk("RPC: %5u call_timeout (minor)\n", task->tk_pid); - goto retry; - } + if (xprt_adjust_timeout(task->tk_rqstp) == 0) + return; dprintk("RPC: %5u call_timeout (major)\n", task->tk_pid); task->tk_timeouts++; @@ -2280,10 +2277,19 @@ call_timeout(struct rpc_task *task) * event? RFC2203 requires the server to drop all such requests. */ rpcauth_invalcred(task); +} -retry: +/* + * 6a. Handle RPC timeout + * We do not release the request slot, so we keep using the + * same XID for all retransmits. + */ +static void +call_timeout(struct rpc_task *task) +{ task->tk_action = call_encode; task->tk_status = 0; + rpc_check_timeout(task); } /*