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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-05 16:54:27 +00:00
8039d35321
This patch adds a base for MPTCP specific tests.
It is currently limited to the is_mptcp field in case of plain TCP
connection because there is no easy way to get the subflow sk from a msk
in userspace. This implies that we cannot lookup the sk_storage attached
to the subflow sk in the sockops program.
v4:
- add copyright 2022 (Andrii)
- use ASSERT_* instead of CHECK_FAIL (Andrii)
- drop SEC("version") (Andrii)
- use is_mptcp in tcp_sock, instead of bpf_tcp_sock (Martin & Andrii)
v5:
- Drop connect_to_mptcp_fd (Martin)
- Use BPF test skeleton (Andrii)
- Use ASSERT_EQ (Andrii)
- Drop the 'msg' parameter of verify_sk
Co-developed-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Nicolas Rybowski <nicolas.rybowski@tessares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Link: https://lore.kernel.org/bpf/20220519233016.105670-4-mathew.j.martineau@linux.intel.com
112 lines
2.3 KiB
C
112 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2020, Tessares SA. */
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/* Copyright (c) 2022, SUSE. */
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#include <test_progs.h>
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#include "cgroup_helpers.h"
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#include "network_helpers.h"
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#include "mptcp_sock.skel.h"
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struct mptcp_storage {
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__u32 invoked;
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__u32 is_mptcp;
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};
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static int verify_sk(int map_fd, int client_fd, __u32 is_mptcp)
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{
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int err, cfd = client_fd;
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struct mptcp_storage val;
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if (is_mptcp == 1)
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return 0;
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err = bpf_map_lookup_elem(map_fd, &cfd, &val);
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if (!ASSERT_OK(err, "bpf_map_lookup_elem"))
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return err;
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if (!ASSERT_EQ(val.invoked, 1, "unexpected invoked count"))
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err++;
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if (!ASSERT_EQ(val.is_mptcp, 0, "unexpected is_mptcp"))
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err++;
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return err;
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}
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static int run_test(int cgroup_fd, int server_fd, bool is_mptcp)
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{
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int client_fd, prog_fd, map_fd, err;
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struct mptcp_sock *sock_skel;
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sock_skel = mptcp_sock__open_and_load();
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if (!ASSERT_OK_PTR(sock_skel, "skel_open_load"))
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return -EIO;
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prog_fd = bpf_program__fd(sock_skel->progs._sockops);
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if (!ASSERT_GE(prog_fd, 0, "bpf_program__fd")) {
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err = -EIO;
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goto out;
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}
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map_fd = bpf_map__fd(sock_skel->maps.socket_storage_map);
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if (!ASSERT_GE(map_fd, 0, "bpf_map__fd")) {
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err = -EIO;
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goto out;
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}
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err = bpf_prog_attach(prog_fd, cgroup_fd, BPF_CGROUP_SOCK_OPS, 0);
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if (!ASSERT_OK(err, "bpf_prog_attach"))
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goto out;
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client_fd = connect_to_fd(server_fd, 0);
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if (!ASSERT_GE(client_fd, 0, "connect to fd")) {
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err = -EIO;
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goto out;
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}
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err += is_mptcp ? verify_sk(map_fd, client_fd, 1) :
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verify_sk(map_fd, client_fd, 0);
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close(client_fd);
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out:
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mptcp_sock__destroy(sock_skel);
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return err;
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}
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static void test_base(void)
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{
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int server_fd, cgroup_fd;
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cgroup_fd = test__join_cgroup("/mptcp");
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if (!ASSERT_GE(cgroup_fd, 0, "test__join_cgroup"))
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return;
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/* without MPTCP */
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server_fd = start_server(AF_INET, SOCK_STREAM, NULL, 0, 0);
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if (!ASSERT_GE(server_fd, 0, "start_server"))
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goto with_mptcp;
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ASSERT_OK(run_test(cgroup_fd, server_fd, false), "run_test tcp");
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close(server_fd);
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with_mptcp:
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/* with MPTCP */
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server_fd = start_mptcp_server(AF_INET, NULL, 0, 0);
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if (!ASSERT_GE(server_fd, 0, "start_mptcp_server"))
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goto close_cgroup_fd;
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ASSERT_OK(run_test(cgroup_fd, server_fd, true), "run_test mptcp");
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close(server_fd);
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close_cgroup_fd:
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close(cgroup_fd);
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}
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void test_mptcp(void)
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{
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if (test__start_subtest("base"))
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test_base();
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}
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