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From: Chuck Lever <chuck.lever@oracle.com>
To: bfields@fieldses.org
Cc: linux-nfs@vger.kernel.org, linux-rdma@vger.kernel.org
Subject: [PATCH v3 13/32] SUNRPC: Tracepoint to record errors in svc_xpo_create()
Date: Thu, 21 May 2020 10:34:51 -0400
Message-ID: <20200521143451.3557.45960.stgit@klimt.1015granger.net> (raw)
In-Reply-To: <20200521141100.3557.17098.stgit@klimt.1015granger.net>

Capture transport creation failures.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 include/trace/events/sunrpc.h |   29 +++++++++++++++++++++++++++++
 net/sunrpc/svc_xprt.c         |    7 ++++++-
 2 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/include/trace/events/sunrpc.h b/include/trace/events/sunrpc.h
index 53f2461cf552..f3296ed2b753 100644
--- a/include/trace/events/sunrpc.h
+++ b/include/trace/events/sunrpc.h
@@ -1167,6 +1167,35 @@ DEFINE_EVENT(svc_rqst_status, svc_send,
 		{ (1UL << XPT_KILL_TEMP),	"XPT_KILL_TEMP"},	\
 		{ (1UL << XPT_CONG_CTRL),	"XPT_CONG_CTRL"})
 
+TRACE_EVENT(svc_xprt_create_err,
+	TP_PROTO(
+		const char *program,
+		const char *protocol,
+		struct sockaddr *sap,
+		const struct svc_xprt *xprt
+	),
+
+	TP_ARGS(program, protocol, sap, xprt),
+
+	TP_STRUCT__entry(
+		__field(long, error)
+		__string(program, program)
+		__string(protocol, protocol)
+		__array(unsigned char, addr, sizeof(struct sockaddr_in6))
+	),
+
+	TP_fast_assign(
+		__entry->error = PTR_ERR(xprt);
+		__assign_str(program, program);
+		__assign_str(protocol, protocol);
+		memcpy(__entry->addr, sap, sizeof(__entry->addr));
+	),
+
+	TP_printk("addr=%pISpc program=%s protocol=%s error=%ld",
+		__entry->addr, __get_str(program), __get_str(protocol),
+		__entry->error)
+);
+
 TRACE_EVENT(svc_xprt_do_enqueue,
 	TP_PROTO(struct svc_xprt *xprt, struct svc_rqst *rqst),
 
diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index 07cdbf7d5764..f89e04210a48 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -206,6 +206,7 @@ static struct svc_xprt *__svc_xpo_create(struct svc_xprt_class *xcl,
 		.sin6_port		= htons(port),
 	};
 #endif
+	struct svc_xprt *xprt;
 	struct sockaddr *sap;
 	size_t len;
 
@@ -224,7 +225,11 @@ static struct svc_xprt *__svc_xpo_create(struct svc_xprt_class *xcl,
 		return ERR_PTR(-EAFNOSUPPORT);
 	}
 
-	return xcl->xcl_ops->xpo_create(serv, net, sap, len, flags);
+	xprt = xcl->xcl_ops->xpo_create(serv, net, sap, len, flags);
+	if (IS_ERR(xprt))
+		trace_svc_xprt_create_err(serv->sv_program->pg_name,
+					  xcl->xcl_name, sap, xprt);
+	return xprt;
 }
 
 /*


  parent reply index

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-21 14:33 [PATCH v3 00/32] Possible NFSD patches for v5.8 Chuck Lever
2020-05-21 14:33 ` [PATCH v3 01/32] SUNRPC: Move xpt_mutex into socket xpo_sendto methods Chuck Lever
2020-05-21 14:33 ` [PATCH v3 02/32] svcrdma: Clean up the tracing for rw_ctx_init errors Chuck Lever
2020-05-21 14:33 ` [PATCH v3 03/32] svcrdma: Clean up handling of get_rw_ctx errors Chuck Lever
2020-05-21 14:34 ` [PATCH v3 04/32] svcrdma: Trace page overruns when constructing RDMA Reads Chuck Lever
2020-05-21 14:34 ` [PATCH v3 05/32] svcrdma: trace undersized Write chunks Chuck Lever
2020-05-21 14:34 ` [PATCH v3 06/32] svcrdma: Fix backchannel return code Chuck Lever
2020-05-21 14:34 ` [PATCH v3 07/32] svcrdma: Remove backchannel dprintk call sites Chuck Lever
2020-05-21 14:34 ` [PATCH v3 08/32] svcrdma: Rename tracepoints that record header decoding errors Chuck Lever
2020-05-21 14:34 ` [PATCH v3 09/32] svcrdma: Remove the SVCRDMA_DEBUG macro Chuck Lever
2020-05-21 14:34 ` [PATCH v3 10/32] svcrdma: Displayed remote IP address should match stored address Chuck Lever
2020-05-21 14:34 ` [PATCH v3 11/32] svcrdma: Add tracepoints to report ->xpo_accept failures Chuck Lever
2020-05-21 14:34 ` [PATCH v3 12/32] SUNRPC: Remove kernel memory address from svc_xprt tracepoints Chuck Lever
2020-05-21 14:34 ` Chuck Lever [this message]
2020-05-21 14:34 ` [PATCH v3 14/32] SUNRPC: Trace a few more generic svc_xprt events Chuck Lever
2020-05-21 14:35 ` [PATCH v3 15/32] SUNRPC: Remove "#include <trace/events/skb.h>" Chuck Lever
2020-05-21 14:35 ` [PATCH v3 16/32] SUNRPC: Add more svcsock tracepoints Chuck Lever
2020-05-21 14:35 ` [PATCH v3 17/32] SUNRPC: Replace dprintk call sites in TCP state change callouts Chuck Lever
2020-05-21 14:35 ` [PATCH v3 18/32] SUNRPC: Trace server-side rpcbind registration events Chuck Lever
2020-05-21 14:35 ` [PATCH v3 19/32] SUNRPC: Rename svc_sock::sk_reclen Chuck Lever
2020-05-21 14:35 ` [PATCH v3 20/32] SUNRPC: Restructure svc_tcp_recv_record() Chuck Lever
2020-05-21 14:35 ` [PATCH v3 21/32] SUNRPC: Replace dprintk() call sites in TCP receive path Chuck Lever
2020-05-21 14:35 ` [PATCH v3 22/32] SUNRPC: Refactor recvfrom path dealing with incomplete TCP receives Chuck Lever
2020-05-21 14:35 ` [PATCH v3 23/32] SUNRPC: Clean up svc_release_skb() functions Chuck Lever
2020-05-21 14:35 ` [PATCH v3 24/32] SUNRPC: Refactor svc_recvfrom() Chuck Lever
2020-05-21 14:35 ` [PATCH v3 25/32] SUNRPC: Restructure svc_udp_recvfrom() Chuck Lever
2020-05-21 14:36 ` [PATCH v3 26/32] SUNRPC: svc_show_status() macro should have enum definitions Chuck Lever
2020-05-21 14:36 ` [PATCH v3 27/32] NFSD: Add tracepoints to NFSD's duplicate reply cache Chuck Lever
2020-05-21 14:36 ` [PATCH v3 28/32] NFSD: Add tracepoints to the NFSD state management code Chuck Lever
2020-05-21 14:36 ` [PATCH v3 29/32] NFSD: Add tracepoints for monitoring NFSD callbacks Chuck Lever
2020-05-21 14:36 ` [PATCH v3 30/32] SUNRPC: Clean up request deferral tracepoints Chuck Lever
2020-05-21 14:36 ` [PATCH v3 31/32] NFSD: Squash an annoying compiler warning Chuck Lever
2020-05-21 14:36 ` [PATCH v3 32/32] NFSD: Fix improperly-formatted Doxygen comments Chuck Lever

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