[PATCH bpf-next v5 0/6] use network helpers, part 7

[PATCH bpf-next v5 0/6] use network helpers, part 7

[Geliang Tang]

From: Geliang Tang <tanggeliang@kylinos.cn>

v5:
 - update patch 1, add getsockopt(SO_PROTOCOL) in connect_to_fd() to
fix errors reported by CI.

v4:
 - fix errors reported by CI.

v3:
 - rename start_client to client_socket
 - Use connect_to_addr in connect_to_fd_opt

v2:
 - update patch 2, extract a new helper start_client.
 - drop patch 3, keep must_fail in network_helper_opts.

Drop type and noconnect from network_helper_opts. And use start_server_str
in mptcp and test_tcp_check_syncookie_user.

Patches 1-4 address Martin's comments in the previous series.

Geliang Tang (6):
  selftests/bpf: Drop type from network_helper_opts
  selftests/bpf: Use connect_to_addr in connect_to_fd_opt
  selftests/bpf: Add client_socket helper
  selftests/bpf: Drop noconnect from network_helper_opts
  selftests/bpf: Use start_server_str in mptcp
  selftests/bpf: Use start_server_str in test_tcp_check_syncookie_user

 tools/testing/selftests/bpf/network_helpers.c | 100 +++++++++---------
 tools/testing/selftests/bpf/network_helpers.h |   6 +-
 .../selftests/bpf/prog_tests/bpf_tcp_ca.c     |   2 +-
 .../selftests/bpf/prog_tests/cgroup_v1v2.c    |   4 +-
 .../bpf/prog_tests/ip_check_defrag.c          |  10 +-
 .../testing/selftests/bpf/prog_tests/mptcp.c  |   7 +-
 .../bpf/test_tcp_check_syncookie_user.c       |  29 +----
 7 files changed, 62 insertions(+), 96 deletions(-)

-- 
2.43.0

[PATCH bpf-next v5 1/6] selftests/bpf: Drop type from network_helper_opts

[Geliang Tang]

From: Geliang Tang <tanggeliang@kylinos.cn>

The opts.{type, noconnect} is at least a bit non intuitive or unnecessary.
The only use case now is in test_bpf_ip_check_defrag_ok which ends up
bypassing most (or at least some) of the connect_to_fd_opts() logic. It's
much better that test should have its own connect_to_fd_opts() instead.

This patch adds a new "type" parameter for connect_to_fd_opts(), then
opts->type and getsockopt(SO_TYPE) can be replaced by "type" parameter in
it.

In connect_to_fd(), use getsockopt(SO_TYPE) to get "type" value and pass
it to connect_to_fd_opts().

In bpf_tcp_ca.c and cgroup_v1v2.c, "SOCK_STREAM" types are passed to
connect_to_fd_opts(), and in ip_check_defrag.c, different types "SOCK_RAW"
and "SOCK_DGRAM" are passed to it.

With these changes, the strcut member "type" of network_helper_opts can be
dropped now.

Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
---
 tools/testing/selftests/bpf/network_helpers.c | 45 +++++++++----------
 tools/testing/selftests/bpf/network_helpers.h |  3 +-
 .../selftests/bpf/prog_tests/bpf_tcp_ca.c     |  2 +-
 .../selftests/bpf/prog_tests/cgroup_v1v2.c    |  4 +-
 .../bpf/prog_tests/ip_check_defrag.c          |  5 +--
 5 files changed, 26 insertions(+), 33 deletions(-)

diff --git a/tools/testing/selftests/bpf/network_helpers.c b/tools/testing/selftests/bpf/network_helpers.c
index e20caef06aae..c0646d5a4283 100644
--- a/tools/testing/selftests/bpf/network_helpers.c
+++ b/tools/testing/selftests/bpf/network_helpers.c
@@ -303,36 +303,16 @@ int connect_to_addr(int type, const struct sockaddr_storage *addr, socklen_t add
 	return -1;
 }
 
-int connect_to_fd_opts(int server_fd, const struct network_helper_opts *opts)
+int connect_to_fd_opts(int server_fd, int type, const struct network_helper_opts *opts)
 {
 	struct sockaddr_storage addr;
 	struct sockaddr_in *addr_in;
-	socklen_t addrlen, optlen;
-	int fd, type, protocol;
+	socklen_t addrlen;
+	int fd;
 
 	if (!opts)
 		opts = &default_opts;
 
-	optlen = sizeof(type);
-
-	if (opts->type) {
-		type = opts->type;
-	} else {
-		if (getsockopt(server_fd, SOL_SOCKET, SO_TYPE, &type, &optlen)) {
-			log_err("getsockopt(SOL_TYPE)");
-			return -1;
-		}
-	}
-
-	if (opts->proto) {
-		protocol = opts->proto;
-	} else {
-		if (getsockopt(server_fd, SOL_SOCKET, SO_PROTOCOL, &protocol, &optlen)) {
-			log_err("getsockopt(SOL_PROTOCOL)");
-			return -1;
-		}
-	}
-
 	addrlen = sizeof(addr);
 	if (getsockname(server_fd, (struct sockaddr *)&addr, &addrlen)) {
 		log_err("Failed to get server addr");
@@ -340,7 +320,7 @@ int connect_to_fd_opts(int server_fd, const struct network_helper_opts *opts)
 	}
 
 	addr_in = (struct sockaddr_in *)&addr;
-	fd = socket(addr_in->sin_family, type, protocol);
+	fd = socket(addr_in->sin_family, type, opts->proto);
 	if (fd < 0) {
 		log_err("Failed to create client socket");
 		return -1;
@@ -369,8 +349,23 @@ int connect_to_fd(int server_fd, int timeout_ms)
 	struct network_helper_opts opts = {
 		.timeout_ms = timeout_ms,
 	};
+	int type, protocol;
+	socklen_t optlen;
+
+	optlen = sizeof(type);
+	if (getsockopt(server_fd, SOL_SOCKET, SO_TYPE, &type, &optlen)) {
+		log_err("getsockopt(SOL_TYPE)");
+		return -1;
+	}
+
+	optlen = sizeof(protocol);
+	if (getsockopt(server_fd, SOL_SOCKET, SO_PROTOCOL, &protocol, &optlen)) {
+		log_err("getsockopt(SOL_PROTOCOL)");
+		return -1;
+	}
+	opts.proto = protocol;
 
-	return connect_to_fd_opts(server_fd, &opts);
+	return connect_to_fd_opts(server_fd, type, &opts);
 }
 
 int connect_fd_to_fd(int client_fd, int server_fd, int timeout_ms)
diff --git a/tools/testing/selftests/bpf/network_helpers.h b/tools/testing/selftests/bpf/network_helpers.h
index 11eea8e2e4f1..c92bed35dfe2 100644
--- a/tools/testing/selftests/bpf/network_helpers.h
+++ b/tools/testing/selftests/bpf/network_helpers.h
@@ -25,7 +25,6 @@ struct network_helper_opts {
 	int timeout_ms;
 	bool must_fail;
 	bool noconnect;
-	int type;
 	int proto;
 	int (*post_socket_cb)(int fd, void *opts);
 	void *cb_opts;
@@ -61,7 +60,7 @@ void free_fds(int *fds, unsigned int nr_close_fds);
 int connect_to_addr(int type, const struct sockaddr_storage *addr, socklen_t len,
 		    const struct network_helper_opts *opts);
 int connect_to_fd(int server_fd, int timeout_ms);
-int connect_to_fd_opts(int server_fd, const struct network_helper_opts *opts);
+int connect_to_fd_opts(int server_fd, int type, const struct network_helper_opts *opts);
 int connect_fd_to_fd(int client_fd, int server_fd, int timeout_ms);
 int fastopen_connect(int server_fd, const char *data, unsigned int data_len,
 		     int timeout_ms);
diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c b/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c
index 67358adf5db3..164f237b24dd 100644
--- a/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c
+++ b/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c
@@ -49,7 +49,7 @@ static bool start_test(char *addr_str,
 		goto err;
 
 	/* connect to server */
-	*cli_fd = connect_to_fd_opts(*srv_fd, cli_opts);
+	*cli_fd = connect_to_fd_opts(*srv_fd, SOCK_STREAM, cli_opts);
 	if (!ASSERT_NEQ(*cli_fd, -1, "connect_to_fd_opts"))
 		goto err;
 
diff --git a/tools/testing/selftests/bpf/prog_tests/cgroup_v1v2.c b/tools/testing/selftests/bpf/prog_tests/cgroup_v1v2.c
index addf720428f7..9709c8db7275 100644
--- a/tools/testing/selftests/bpf/prog_tests/cgroup_v1v2.c
+++ b/tools/testing/selftests/bpf/prog_tests/cgroup_v1v2.c
@@ -32,7 +32,7 @@ static int run_test(int cgroup_fd, int server_fd, bool classid)
 		goto out;
 	}
 
-	fd = connect_to_fd_opts(server_fd, &opts);
+	fd = connect_to_fd_opts(server_fd, SOCK_STREAM, &opts);
 	if (fd < 0)
 		err = -1;
 	else
@@ -52,7 +52,7 @@ void test_cgroup_v1v2(void)
 	server_fd = start_server(AF_INET, SOCK_STREAM, NULL, port, 0);
 	if (!ASSERT_GE(server_fd, 0, "server_fd"))
 		return;
-	client_fd = connect_to_fd_opts(server_fd, &opts);
+	client_fd = connect_to_fd_opts(server_fd, SOCK_STREAM, &opts);
 	if (!ASSERT_GE(client_fd, 0, "client_fd")) {
 		close(server_fd);
 		return;
diff --git a/tools/testing/selftests/bpf/prog_tests/ip_check_defrag.c b/tools/testing/selftests/bpf/prog_tests/ip_check_defrag.c
index 284764e7179f..1607a05bf2c2 100644
--- a/tools/testing/selftests/bpf/prog_tests/ip_check_defrag.c
+++ b/tools/testing/selftests/bpf/prog_tests/ip_check_defrag.c
@@ -164,7 +164,6 @@ void test_bpf_ip_check_defrag_ok(bool ipv6)
 	};
 	struct network_helper_opts tx_ops = {
 		.timeout_ms = 1000,
-		.type = SOCK_RAW,
 		.proto = IPPROTO_RAW,
 		.noconnect = true,
 	};
@@ -201,7 +200,7 @@ void test_bpf_ip_check_defrag_ok(bool ipv6)
 	nstoken = open_netns(NS0);
 	if (!ASSERT_OK_PTR(nstoken, "setns ns0"))
 		goto out;
-	client_tx_fd = connect_to_fd_opts(srv_fd, &tx_ops);
+	client_tx_fd = connect_to_fd_opts(srv_fd, SOCK_RAW, &tx_ops);
 	close_netns(nstoken);
 	if (!ASSERT_GE(client_tx_fd, 0, "connect_to_fd_opts"))
 		goto out;
@@ -210,7 +209,7 @@ void test_bpf_ip_check_defrag_ok(bool ipv6)
 	nstoken = open_netns(NS0);
 	if (!ASSERT_OK_PTR(nstoken, "setns ns0"))
 		goto out;
-	client_rx_fd = connect_to_fd_opts(srv_fd, &rx_opts);
+	client_rx_fd = connect_to_fd_opts(srv_fd, SOCK_DGRAM, &rx_opts);
 	close_netns(nstoken);
 	if (!ASSERT_GE(client_rx_fd, 0, "connect_to_fd_opts"))
 		goto out;
-- 
2.43.0

[PATCH bpf-next v5 2/6] selftests/bpf: Use connect_to_addr in connect_to_fd_opt

[Geliang Tang]

From: Geliang Tang <tanggeliang@kylinos.cn>

This patch moves "post_socket_cb" and "noconnect" into connect_to_addr(),
then connect_to_fd_opts() can be implemented by getsockname() and
connect_to_addr(). This change makes connect_to_* interfaces more unified.

Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
---
 tools/testing/selftests/bpf/network_helpers.c | 33 ++++---------------
 1 file changed, 7 insertions(+), 26 deletions(-)

diff --git a/tools/testing/selftests/bpf/network_helpers.c b/tools/testing/selftests/bpf/network_helpers.c
index c0646d5a4283..5d1b4f165def 100644
--- a/tools/testing/selftests/bpf/network_helpers.c
+++ b/tools/testing/selftests/bpf/network_helpers.c
@@ -293,9 +293,14 @@ int connect_to_addr(int type, const struct sockaddr_storage *addr, socklen_t add
 	if (settimeo(fd, opts->timeout_ms))
 		goto error_close;
 
-	if (connect_fd_to_addr(fd, addr, addrlen, opts->must_fail))
+	if (opts->post_socket_cb &&
+	    opts->post_socket_cb(fd, opts->cb_opts))
 		goto error_close;
 
+	if (!opts->noconnect)
+		if (connect_fd_to_addr(fd, addr, addrlen, opts->must_fail))
+			goto error_close;
+
 	return fd;
 
 error_close:
@@ -306,9 +311,7 @@ int connect_to_addr(int type, const struct sockaddr_storage *addr, socklen_t add
 int connect_to_fd_opts(int server_fd, int type, const struct network_helper_opts *opts)
 {
 	struct sockaddr_storage addr;
-	struct sockaddr_in *addr_in;
 	socklen_t addrlen;
-	int fd;
 
 	if (!opts)
 		opts = &default_opts;
@@ -319,29 +322,7 @@ int connect_to_fd_opts(int server_fd, int type, const struct network_helper_opts
 		return -1;
 	}
 
-	addr_in = (struct sockaddr_in *)&addr;
-	fd = socket(addr_in->sin_family, type, opts->proto);
-	if (fd < 0) {
-		log_err("Failed to create client socket");
-		return -1;
-	}
-
-	if (settimeo(fd, opts->timeout_ms))
-		goto error_close;
-
-	if (opts->post_socket_cb &&
-	    opts->post_socket_cb(fd, opts->cb_opts))
-		goto error_close;
-
-	if (!opts->noconnect)
-		if (connect_fd_to_addr(fd, &addr, addrlen, opts->must_fail))
-			goto error_close;
-
-	return fd;
-
-error_close:
-	save_errno_close(fd);
-	return -1;
+	return connect_to_addr(type, &addr, addrlen, opts);
 }
 
 int connect_to_fd(int server_fd, int timeout_ms)
-- 
2.43.0

[PATCH bpf-next v5 3/6] selftests/bpf: Add client_socket helper

[Geliang Tang]

From: Geliang Tang <tanggeliang@kylinos.cn>

This patch extracts a new helper client_socket() from connect_to_fd_opts()
to create the client socket, but don't connect to the server. Then
connect_to_fd_opts() can be implemented using client_socket() and
connect_fd_to_addr(). This helper can be used in connect_to_addr() too,
and make "noconnect" opts useless.

Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
---
 tools/testing/selftests/bpf/network_helpers.c | 37 +++++++++++++++----
 tools/testing/selftests/bpf/network_helpers.h |  2 +
 2 files changed, 31 insertions(+), 8 deletions(-)

diff --git a/tools/testing/selftests/bpf/network_helpers.c b/tools/testing/selftests/bpf/network_helpers.c
index 5d1b4f165def..5f8214e2880d 100644
--- a/tools/testing/selftests/bpf/network_helpers.c
+++ b/tools/testing/selftests/bpf/network_helpers.c
@@ -249,6 +249,34 @@ int fastopen_connect(int server_fd, const char *data, unsigned int data_len,
 	return -1;
 }
 
+int client_socket(int family, int type,
+		  const struct network_helper_opts *opts)
+{
+	int fd;
+
+	if (!opts)
+		opts = &default_opts;
+
+	fd = socket(family, type, opts->proto);
+	if (fd < 0) {
+		log_err("Failed to create client socket");
+		return -1;
+	}
+
+	if (settimeo(fd, opts->timeout_ms))
+		goto error_close;
+
+	if (opts->post_socket_cb &&
+	    opts->post_socket_cb(fd, opts->cb_opts))
+		goto error_close;
+
+	return fd;
+
+error_close:
+	save_errno_close(fd);
+	return -1;
+}
+
 static int connect_fd_to_addr(int fd,
 			      const struct sockaddr_storage *addr,
 			      socklen_t addrlen, const bool must_fail)
@@ -284,19 +312,12 @@ int connect_to_addr(int type, const struct sockaddr_storage *addr, socklen_t add
 	if (!opts)
 		opts = &default_opts;
 
-	fd = socket(addr->ss_family, type, opts->proto);
+	fd = client_socket(addr->ss_family, type, opts);
 	if (fd < 0) {
 		log_err("Failed to create client socket");
 		return -1;
 	}
 
-	if (settimeo(fd, opts->timeout_ms))
-		goto error_close;
-
-	if (opts->post_socket_cb &&
-	    opts->post_socket_cb(fd, opts->cb_opts))
-		goto error_close;
-
 	if (!opts->noconnect)
 		if (connect_fd_to_addr(fd, addr, addrlen, opts->must_fail))
 			goto error_close;
diff --git a/tools/testing/selftests/bpf/network_helpers.h b/tools/testing/selftests/bpf/network_helpers.h
index c92bed35dfe2..e89eadfb02d6 100644
--- a/tools/testing/selftests/bpf/network_helpers.h
+++ b/tools/testing/selftests/bpf/network_helpers.h
@@ -57,6 +57,8 @@ int *start_reuseport_server(int family, int type, const char *addr_str,
 int start_server_addr(int type, const struct sockaddr_storage *addr, socklen_t len,
 		      const struct network_helper_opts *opts);
 void free_fds(int *fds, unsigned int nr_close_fds);
+int client_socket(int family, int type,
+		  const struct network_helper_opts *opts);
 int connect_to_addr(int type, const struct sockaddr_storage *addr, socklen_t len,
 		    const struct network_helper_opts *opts);
 int connect_to_fd(int server_fd, int timeout_ms);
-- 
2.43.0

[PATCH bpf-next v5 4/6] selftests/bpf: Drop noconnect from network_helper_opts

[Geliang Tang]

From: Geliang Tang <tanggeliang@kylinos.cn>

In test_bpf_ip_check_defrag_ok(), the new helper client_socket() can be
used to replace connect_to_fd_opts() with "noconnect" opts, and the strcut
member "noconnect" of network_helper_opts can be dropped now, always
connect to server in connect_to_fd_opts().

Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
---
 tools/testing/selftests/bpf/network_helpers.c            | 5 ++---
 tools/testing/selftests/bpf/network_helpers.h            | 1 -
 tools/testing/selftests/bpf/prog_tests/ip_check_defrag.c | 9 ++++-----
 3 files changed, 6 insertions(+), 9 deletions(-)

diff --git a/tools/testing/selftests/bpf/network_helpers.c b/tools/testing/selftests/bpf/network_helpers.c
index 5f8214e2880d..44c2c8fa542a 100644
--- a/tools/testing/selftests/bpf/network_helpers.c
+++ b/tools/testing/selftests/bpf/network_helpers.c
@@ -318,9 +318,8 @@ int connect_to_addr(int type, const struct sockaddr_storage *addr, socklen_t add
 		return -1;
 	}
 
-	if (!opts->noconnect)
-		if (connect_fd_to_addr(fd, addr, addrlen, opts->must_fail))
-			goto error_close;
+	if (connect_fd_to_addr(fd, addr, addrlen, opts->must_fail))
+		goto error_close;
 
 	return fd;
 
diff --git a/tools/testing/selftests/bpf/network_helpers.h b/tools/testing/selftests/bpf/network_helpers.h
index e89eadfb02d6..9ea36524b9db 100644
--- a/tools/testing/selftests/bpf/network_helpers.h
+++ b/tools/testing/selftests/bpf/network_helpers.h
@@ -24,7 +24,6 @@ typedef __u16 __sum16;
 struct network_helper_opts {
 	int timeout_ms;
 	bool must_fail;
-	bool noconnect;
 	int proto;
 	int (*post_socket_cb)(int fd, void *opts);
 	void *cb_opts;
diff --git a/tools/testing/selftests/bpf/prog_tests/ip_check_defrag.c b/tools/testing/selftests/bpf/prog_tests/ip_check_defrag.c
index 1607a05bf2c2..e73da3de5bf6 100644
--- a/tools/testing/selftests/bpf/prog_tests/ip_check_defrag.c
+++ b/tools/testing/selftests/bpf/prog_tests/ip_check_defrag.c
@@ -158,14 +158,13 @@ static int send_frags6(int client)
 
 void test_bpf_ip_check_defrag_ok(bool ipv6)
 {
+	int family = ipv6 ? AF_INET6 : AF_INET;
 	struct network_helper_opts rx_opts = {
 		.timeout_ms = 1000,
-		.noconnect = true,
 	};
 	struct network_helper_opts tx_ops = {
 		.timeout_ms = 1000,
 		.proto = IPPROTO_RAW,
-		.noconnect = true,
 	};
 	struct sockaddr_storage caddr;
 	struct ip_check_defrag *skel;
@@ -191,7 +190,7 @@ void test_bpf_ip_check_defrag_ok(bool ipv6)
 	nstoken = open_netns(NS1);
 	if (!ASSERT_OK_PTR(nstoken, "setns ns1"))
 		goto out;
-	srv_fd = start_server(ipv6 ? AF_INET6 : AF_INET, SOCK_DGRAM, NULL, SERVER_PORT, 0);
+	srv_fd = start_server(family, SOCK_DGRAM, NULL, SERVER_PORT, 0);
 	close_netns(nstoken);
 	if (!ASSERT_GE(srv_fd, 0, "start_server"))
 		goto out;
@@ -200,7 +199,7 @@ void test_bpf_ip_check_defrag_ok(bool ipv6)
 	nstoken = open_netns(NS0);
 	if (!ASSERT_OK_PTR(nstoken, "setns ns0"))
 		goto out;
-	client_tx_fd = connect_to_fd_opts(srv_fd, SOCK_RAW, &tx_ops);
+	client_tx_fd = client_socket(family, SOCK_RAW, &tx_ops);
 	close_netns(nstoken);
 	if (!ASSERT_GE(client_tx_fd, 0, "connect_to_fd_opts"))
 		goto out;
@@ -209,7 +208,7 @@ void test_bpf_ip_check_defrag_ok(bool ipv6)
 	nstoken = open_netns(NS0);
 	if (!ASSERT_OK_PTR(nstoken, "setns ns0"))
 		goto out;
-	client_rx_fd = connect_to_fd_opts(srv_fd, SOCK_DGRAM, &rx_opts);
+	client_rx_fd = client_socket(family, SOCK_DGRAM, &rx_opts);
 	close_netns(nstoken);
 	if (!ASSERT_GE(client_rx_fd, 0, "connect_to_fd_opts"))
 		goto out;
-- 
2.43.0

[PATCH bpf-next v5 5/6] selftests/bpf: Use start_server_str in mptcp

[Geliang Tang]

From: Geliang Tang <tanggeliang@kylinos.cn>

Since start_server_str() is added now, it can be used in mptcp.c in
start_mptcp_server() instead of using helpers make_sockaddr() and
start_server_addr() to simplify the code.

Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
---
 tools/testing/selftests/bpf/prog_tests/mptcp.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/tools/testing/selftests/bpf/prog_tests/mptcp.c b/tools/testing/selftests/bpf/prog_tests/mptcp.c
index 274d2e033e39..d2ca32fa3b21 100644
--- a/tools/testing/selftests/bpf/prog_tests/mptcp.c
+++ b/tools/testing/selftests/bpf/prog_tests/mptcp.c
@@ -89,13 +89,8 @@ static int start_mptcp_server(int family, const char *addr_str, __u16 port,
 		.timeout_ms	= timeout_ms,
 		.proto		= IPPROTO_MPTCP,
 	};
-	struct sockaddr_storage addr;
-	socklen_t addrlen;
 
-	if (make_sockaddr(family, addr_str, port, &addr, &addrlen))
-		return -1;
-
-	return start_server_addr(SOCK_STREAM, &addr, addrlen, &opts);
+	return start_server_str(family, SOCK_STREAM, addr_str, port, &opts);
 }
 
 static int verify_tsk(int map_fd, int client_fd)
-- 
2.43.0

[PATCH bpf-next v5 6/6] selftests/bpf: Use start_server_str in test_tcp_check_syncookie_user

[Geliang Tang]

From: Geliang Tang <tanggeliang@kylinos.cn>

Since start_server_str() is added now, it can be used in script
test_tcp_check_syncookie_user.c instead of start_server_addr() to
simplify the code.

Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
---
 .../bpf/test_tcp_check_syncookie_user.c       | 29 ++-----------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/tools/testing/selftests/bpf/test_tcp_check_syncookie_user.c b/tools/testing/selftests/bpf/test_tcp_check_syncookie_user.c
index aebc58c24dc5..3844f9b8232a 100644
--- a/tools/testing/selftests/bpf/test_tcp_check_syncookie_user.c
+++ b/tools/testing/selftests/bpf/test_tcp_check_syncookie_user.c
@@ -156,10 +156,6 @@ static int v6only_false(int fd, void *opts)
 int main(int argc, char **argv)
 {
 	struct network_helper_opts opts = { 0 };
-	struct sockaddr_in addr4;
-	struct sockaddr_in6 addr6;
-	struct sockaddr_in addr4dual;
-	struct sockaddr_in6 addr6dual;
 	int server = -1;
 	int server_v6 = -1;
 	int server_dual = -1;
@@ -181,36 +177,17 @@ int main(int argc, char **argv)
 		goto err;
 	}
 
-	memset(&addr4, 0, sizeof(addr4));
-	addr4.sin_family = AF_INET;
-	addr4.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
-	addr4.sin_port = 0;
-	memcpy(&addr4dual, &addr4, sizeof(addr4dual));
-
-	memset(&addr6, 0, sizeof(addr6));
-	addr6.sin6_family = AF_INET6;
-	addr6.sin6_addr = in6addr_loopback;
-	addr6.sin6_port = 0;
-
-	memset(&addr6dual, 0, sizeof(addr6dual));
-	addr6dual.sin6_family = AF_INET6;
-	addr6dual.sin6_addr = in6addr_any;
-	addr6dual.sin6_port = 0;
-
-	server = start_server_addr(SOCK_STREAM, (struct sockaddr_storage *)&addr4,
-				   sizeof(addr4), NULL);
+	server = start_server_str(AF_INET, SOCK_STREAM, "127.0.0.1", 0, NULL);
 	if (server == -1)
 		goto err;
 
 	opts.post_socket_cb = v6only_true;
-	server_v6 = start_server_addr(SOCK_STREAM, (struct sockaddr_storage *)&addr6,
-				      sizeof(addr6), &opts);
+	server_v6 = start_server_str(AF_INET6, SOCK_STREAM, "::1", 0, &opts);
 	if (server_v6 == -1)
 		goto err;
 
 	opts.post_socket_cb = v6only_false;
-	server_dual = start_server_addr(SOCK_STREAM, (struct sockaddr_storage *)&addr6dual,
-					sizeof(addr6dual), &opts);
+	server_dual = start_server_str(AF_INET6, SOCK_STREAM, "::0", 0, &opts);
 	if (server_dual == -1)
 		goto err;
 
-- 
2.43.0

Re: [PATCH bpf-next v5 4/6] selftests/bpf: Drop noconnect from network_helper_opts

[Eduard Zingerman]

On Wed, 2024-06-19 at 10:51 +0800, Geliang Tang wrote:
> From: Geliang Tang <tanggeliang@kylinos.cn>
> 
> In test_bpf_ip_check_defrag_ok(), the new helper client_socket() can be
> used to replace connect_to_fd_opts() with "noconnect" opts, and the strcut
> member "noconnect" of network_helper_opts can be dropped now, always
> connect to server in connect_to_fd_opts().
> 
> Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
> ---

Acked-by: Eduard Zingerman <eddyz87@gmail.com>

Re: [PATCH bpf-next v5 3/6] selftests/bpf: Add client_socket helper

[Eduard Zingerman]

On Wed, 2024-06-19 at 10:51 +0800, Geliang Tang wrote:
> From: Geliang Tang <tanggeliang@kylinos.cn>
> 
> This patch extracts a new helper client_socket() from connect_to_fd_opts()
> to create the client socket, but don't connect to the server. Then
> connect_to_fd_opts() can be implemented using client_socket() and
> connect_fd_to_addr(). This helper can be used in connect_to_addr() too,
> and make "noconnect" opts useless.
> 
> Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
> ---

Acked-by: Eduard Zingerman <eddyz87@gmail.com>

Re: [PATCH bpf-next v5 2/6] selftests/bpf: Use connect_to_addr in connect_to_fd_opt

[Eduard Zingerman]

On Wed, 2024-06-19 at 10:51 +0800, Geliang Tang wrote:
> From: Geliang Tang <tanggeliang@kylinos.cn>
> 
> This patch moves "post_socket_cb" and "noconnect" into connect_to_addr(),
> then connect_to_fd_opts() can be implemented by getsockname() and
> connect_to_addr(). This change makes connect_to_* interfaces more unified.
> 
> Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
> ---

Acked-by: Eduard Zingerman <eddyz87@gmail.com>

Re: [PATCH bpf-next v5 1/6] selftests/bpf: Drop type from network_helper_opts

[Eduard Zingerman]

On Wed, 2024-06-19 at 10:51 +0800, Geliang Tang wrote:
> From: Geliang Tang <tanggeliang@kylinos.cn>
> 
> The opts.{type, noconnect} is at least a bit non intuitive or unnecessary.
> The only use case now is in test_bpf_ip_check_defrag_ok which ends up
> bypassing most (or at least some) of the connect_to_fd_opts() logic. It's
> much better that test should have its own connect_to_fd_opts() instead.
> 
> This patch adds a new "type" parameter for connect_to_fd_opts(), then
> opts->type and getsockopt(SO_TYPE) can be replaced by "type" parameter in
> it.
> 
> In connect_to_fd(), use getsockopt(SO_TYPE) to get "type" value and pass
> it to connect_to_fd_opts().
> 
> In bpf_tcp_ca.c and cgroup_v1v2.c, "SOCK_STREAM" types are passed to
> connect_to_fd_opts(), and in ip_check_defrag.c, different types "SOCK_RAW"
> and "SOCK_DGRAM" are passed to it.
> 
> With these changes, the strcut member "type" of network_helper_opts can be
> dropped now.
> 
> Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
> ---

Acked-by: Eduard Zingerman <eddyz87@gmail.com>

Re: [PATCH bpf-next v5 4/6] selftests/bpf: Drop noconnect from network_helper_opts

[Eduard Zingerman]

On Wed, 2024-06-19 at 10:51 +0800, Geliang Tang wrote:

Oops, sorry, missed two places that should be changed.
Please keep my ack if you respin.

[...]

> diff --git a/tools/testing/selftests/bpf/prog_tests/ip_check_defrag.c b/tools/testing/selftests/bpf/prog_tests/ip_check_defrag.c
> index 1607a05bf2c2..e73da3de5bf6 100644
> --- a/tools/testing/selftests/bpf/prog_tests/ip_check_defrag.c
> +++ b/tools/testing/selftests/bpf/prog_tests/ip_check_defrag.c

[...]

> @@ -200,7 +199,7 @@ void test_bpf_ip_check_defrag_ok(bool ipv6)
>  	nstoken = open_netns(NS0);
>  	if (!ASSERT_OK_PTR(nstoken, "setns ns0"))
>  		goto out;
> -	client_tx_fd = connect_to_fd_opts(srv_fd, SOCK_RAW, &tx_ops);
> +	client_tx_fd = client_socket(family, SOCK_RAW, &tx_ops);
>  	close_netns(nstoken);
>  	if (!ASSERT_GE(client_tx_fd, 0, "connect_to_fd_opts"))

The ASSERT string should be changed.

>  		goto out;
> @@ -209,7 +208,7 @@ void test_bpf_ip_check_defrag_ok(bool ipv6)
>  	nstoken = open_netns(NS0);
>  	if (!ASSERT_OK_PTR(nstoken, "setns ns0"))
>  		goto out;
> -	client_rx_fd = connect_to_fd_opts(srv_fd, SOCK_DGRAM, &rx_opts);
> +	client_rx_fd = client_socket(family, SOCK_DGRAM, &rx_opts);
>  	close_netns(nstoken);
>  	if (!ASSERT_GE(client_rx_fd, 0, "connect_to_fd_opts"))

The ASSERT string should be changed.

>  		goto out;