linux-kernel - [PATCH net-next v5 4/5] vsock/test: Introduce enable_so

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Message-Id: <20250521-vsock-linger-v5-4-94827860d1d6@rbox.co>
Date: Wed, 21 May 2025 00:55:22 +0200
From: Michal Luczaj <mhal@...x.co>
To: Stefano Garzarella <sgarzare@...hat.com>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Simon Horman <horms@...nel.org>, "Michael S. Tsirkin" <mst@...hat.com>, 
 Jason Wang <jasowang@...hat.com>, Xuan Zhuo <xuanzhuo@...ux.alibaba.com>, 
 Eugenio Pérez <eperezma@...hat.com>, 
 Stefan Hajnoczi <stefanha@...hat.com>
Cc: virtualization@...ts.linux.dev, netdev@...r.kernel.org, 
 linux-kernel@...r.kernel.org, kvm@...r.kernel.org, 
 Michal Luczaj <mhal@...x.co>
Subject: [PATCH net-next v5 4/5] vsock/test: Introduce enable_so_linger()
 helper

Add a helper function that sets SO_LINGER. Adapt the caller.

Signed-off-by: Michal Luczaj <mhal@...x.co>
---
 tools/testing/vsock/util.c       | 13 +++++++++++++
 tools/testing/vsock/util.h       |  4 ++++
 tools/testing/vsock/vsock_test.c | 10 +---------
 3 files changed, 18 insertions(+), 9 deletions(-)

diff --git a/tools/testing/vsock/util.c b/tools/testing/vsock/util.c
index 120277be14ab2f58e0350adcdd56fc18861399c9..41b47f7deadcda68fddc2b22a6d9bb7847cc0a14 100644
--- a/tools/testing/vsock/util.c
+++ b/tools/testing/vsock/util.c
@@ -823,3 +823,16 @@ void enable_so_zerocopy_check(int fd)
 	setsockopt_int_check(fd, SOL_SOCKET, SO_ZEROCOPY, 1,
 			     "setsockopt SO_ZEROCOPY");
 }
+
+void enable_so_linger(int fd)
+{
+	struct linger optval = {
+		.l_onoff = 1,
+		.l_linger = LINGER_TIMEOUT
+	};
+
+	if (setsockopt(fd, SOL_SOCKET, SO_LINGER, &optval, sizeof(optval))) {
+		perror("setsockopt(SO_LINGER)");
+		exit(EXIT_FAILURE);
+	}
+}
diff --git a/tools/testing/vsock/util.h b/tools/testing/vsock/util.h
index e307f0d4f6940e984b84a95fd0d57598e7c4e35f..1b3d8eb2c4b3c41c9007584177455c4fa442334c 100644
--- a/tools/testing/vsock/util.h
+++ b/tools/testing/vsock/util.h
@@ -14,6 +14,9 @@ enum test_mode {
 
 #define DEFAULT_PEER_PORT	1234
 
+/* Half of the default to not risk timing out the control channel */
+#define LINGER_TIMEOUT		(TIMEOUT / 2)
+
 /* Test runner options */
 struct test_opts {
 	enum test_mode mode;
@@ -80,4 +83,5 @@ void setsockopt_int_check(int fd, int level, int optname, int val,
 void setsockopt_timeval_check(int fd, int level, int optname,
 			      struct timeval val, char const *errmsg);
 void enable_so_zerocopy_check(int fd);
+void enable_so_linger(int fd);
 #endif /* UTIL_H */
diff --git a/tools/testing/vsock/vsock_test.c b/tools/testing/vsock/vsock_test.c
index 4c2c94151070d54d1ed6e6af5a6de0b262a0206e..f401c6a79495bc7fda97012e5bfeabec7dbfb60a 100644
--- a/tools/testing/vsock/vsock_test.c
+++ b/tools/testing/vsock/vsock_test.c
@@ -1813,10 +1813,6 @@ static void test_stream_connect_retry_server(const struct test_opts *opts)
 
 static void test_stream_linger_client(const struct test_opts *opts)
 {
-	struct linger optval = {
-		.l_onoff = 1,
-		.l_linger = 1
-	};
 	int fd;
 
 	fd = vsock_stream_connect(opts->peer_cid, opts->peer_port);
@@ -1825,11 +1821,7 @@ static void test_stream_linger_client(const struct test_opts *opts)
 		exit(EXIT_FAILURE);
 	}
 
-	if (setsockopt(fd, SOL_SOCKET, SO_LINGER, &optval, sizeof(optval))) {
-		perror("setsockopt(SO_LINGER)");
-		exit(EXIT_FAILURE);
-	}
-
+	enable_so_linger(fd);
 	close(fd);
 }
 

-- 
2.49.0