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[68.61.232.219]) by smtp.gmail.com with ESMTPSA id e15sm261039ios.19.2019.04.24.06.39.48 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 24 Apr 2019 06:39:49 -0700 (PDT) Received: from manet.1015granger.net (manet.1015granger.net [192.168.1.51]) by gateway.1015granger.net (8.14.7/8.14.7) with ESMTP id x3ODdmRp011301; Wed, 24 Apr 2019 13:39:48 GMT Subject: [PATCH v3 11/21] xprtrdma: Trace marshaling failures From: Chuck Lever To: anna.schumaker@netapp.com Cc: linux-rdma@vger.kernel.org, linux-nfs@vger.kernel.org Date: Wed, 24 Apr 2019 09:39:48 -0400 Message-ID: <20190424133948.5077.73761.stgit@manet.1015granger.net> In-Reply-To: <20190424133516.5077.67283.stgit@manet.1015granger.net> References: <20190424133516.5077.67283.stgit@manet.1015granger.net> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Record an event when rpcrdma_marshal_req returns a non-zero return value to help track down why an xprt close might have occurred. Signed-off-by: Chuck Lever --- include/trace/events/rpcrdma.h | 27 +++++++++++++++++++++++++++ net/sunrpc/xprtrdma/rpc_rdma.c | 1 + 2 files changed, 28 insertions(+) diff --git a/include/trace/events/rpcrdma.h b/include/trace/events/rpcrdma.h index 962975b..df9851cb 100644 --- a/include/trace/events/rpcrdma.h +++ b/include/trace/events/rpcrdma.h @@ -511,6 +511,33 @@ ) ); +TRACE_EVENT(xprtrdma_marshal_failed, + TP_PROTO(const struct rpc_rqst *rqst, + int ret + ), + + TP_ARGS(rqst, ret), + + TP_STRUCT__entry( + __field(unsigned int, task_id) + __field(unsigned int, client_id) + __field(u32, xid) + __field(int, ret) + ), + + TP_fast_assign( + __entry->task_id = rqst->rq_task->tk_pid; + __entry->client_id = rqst->rq_task->tk_client->cl_clid; + __entry->xid = be32_to_cpu(rqst->rq_xid); + __entry->ret = ret; + ), + + TP_printk("task:%u@%u xid=0x%08x: ret=%d", + __entry->task_id, __entry->client_id, __entry->xid, + __entry->ret + ) +); + TRACE_EVENT(xprtrdma_post_send, TP_PROTO( const struct rpcrdma_req *req, diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c index 231a44b..45cba06 100644 --- a/net/sunrpc/xprtrdma/rpc_rdma.c +++ b/net/sunrpc/xprtrdma/rpc_rdma.c @@ -875,6 +875,7 @@ static bool rpcrdma_prepare_msg_sges(struct rpcrdma_xprt *r_xprt, return 0; out_err: + trace_xprtrdma_marshal_failed(rqst, ret); switch (ret) { case -EAGAIN: xprt_wait_for_buffer_space(rqst->rq_xprt);