On 8/3/23 6:41 AM, Geliang Tang wrote:
Implement a new test program mptcpify: if the family is AF_INET or AF_INET6, the type is SOCK_STREAM, and the protocol ID is 0 or IPPROTO_TCP, set it to IPPROTO_MPTCP. It will be hooked in update_socket_protocol().
Extend the MPTCP test base, add a selftest test_mptcpify() for the mptcpify case. Open and load the mptcpify test prog to mptcpify the TCP sockets dynamically, then use start_server() and connect_to_fd() to create a TCP socket, but actually what's created is an MPTCP socket, which can be verified through the outputs of 'ss' and 'nstat' commands.
Reviewed-by: Matthieu Baerts matthieu.baerts@tessares.net Signed-off-by: Geliang Tang geliang.tang@suse.com
.../testing/selftests/bpf/prog_tests/mptcp.c | 94 +++++++++++++++++++ tools/testing/selftests/bpf/progs/mptcpify.c | 25 +++++ 2 files changed, 119 insertions(+) create mode 100644 tools/testing/selftests/bpf/progs/mptcpify.c
diff --git a/tools/testing/selftests/bpf/prog_tests/mptcp.c b/tools/testing/selftests/bpf/prog_tests/mptcp.c index 4407bd5c9e9a..caab3aa6a162 100644 --- a/tools/testing/selftests/bpf/prog_tests/mptcp.c +++ b/tools/testing/selftests/bpf/prog_tests/mptcp.c @@ -6,6 +6,7 @@ #include "cgroup_helpers.h" #include "network_helpers.h" #include "mptcp_sock.skel.h" +#include "mptcpify.skel.h" char NS_TEST[32]; @@ -195,8 +196,101 @@ static void test_base(void) close(cgroup_fd); } +static void send_byte(int fd) +{
- char b = 0x55;
- ASSERT_EQ(write(fd, &b, sizeof(b)), 1, "send single byte");
+}
+static int verify_mptcpify(void) +{
- char cmd[256];
- int err = 0;
- snprintf(cmd, sizeof(cmd),
"ip netns exec %s ss -tOni | grep -q '%s'",NS_TEST, "tcp-ulp-mptcp");
Could you show what is the expected output from the above command line ip netns exec %s ss -tOni ? This way, users can easily reason about the ss states based on tests.
- if (!ASSERT_OK(system(cmd), "No tcp-ulp-mptcp found!"))
err++;- snprintf(cmd, sizeof(cmd),
"ip netns exec %s nstat -asz %s | awk '%s' | grep -q '%s'",NS_TEST, "MPTcpExtMPCapableSYNACKRX","NR==1 {next} {print $2}", "1");
The same thing here. Could you show the expected output with ip netns exec %s nstat -asz %s ?
- if (!ASSERT_OK(system(cmd), "No MPTcpExtMPCapableSYNACKRX found!"))
err++;- return err;
+}
[...]