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selftest/bpf: Add test for af_vsock poll()

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Verify that vsock's poll() notices when sk_psock::ingress_msg isn't empty.

Signed-off-by: Michal Luczaj <mhal@rbox.co>
Acked-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20241118-vsock-bpf-poll-close-v1-2-f1b9669cacdc@rbox.co
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: John Fastabend <john.fastabend@gmail.com>
This commit is contained in:
Michal Luczaj 2024-11-18 22:03:42 +01:00 committed by Alexei Starovoitov
parent 9f0fc98145
commit 9c2a2a4513
1 changed files with 46 additions and 0 deletions
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46
tools/testing/selftests/bpf/prog_tests/sockmap_basic.c
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@ -937,6 +937,50 @@ out:
test_sockmap_pass_prog__destroy(skel);
}
static void test_sockmap_skb_verdict_vsock_poll(void)
{
struct test_sockmap_pass_prog *skel;
int err, map, conn, peer;
struct bpf_program *prog;
struct bpf_link *link;
char buf = 'x';
int zero = 0;
skel = test_sockmap_pass_prog__open_and_load();
if (!ASSERT_OK_PTR(skel, "open_and_load"))
return;
if (create_pair(AF_VSOCK, SOCK_STREAM, &conn, &peer))
goto destroy;
prog = skel->progs.prog_skb_verdict;
map = bpf_map__fd(skel->maps.sock_map_rx);
link = bpf_program__attach_sockmap(prog, map);
if (!ASSERT_OK_PTR(link, "bpf_program__attach_sockmap"))
goto close;
err = bpf_map_update_elem(map, &zero, &conn, BPF_ANY);
if (!ASSERT_OK(err, "bpf_map_update_elem"))
goto detach;
if (xsend(peer, &buf, 1, 0) != 1)
goto detach;
err = poll_read(conn, IO_TIMEOUT_SEC);
if (!ASSERT_OK(err, "poll"))
goto detach;
if (xrecv_nonblock(conn, &buf, 1, 0) != 1)
FAIL("xrecv_nonblock");
detach:
bpf_link__detach(link);
close:
xclose(conn);
xclose(peer);
destroy:
test_sockmap_pass_prog__destroy(skel);
}
void test_sockmap_basic(void)
{
if (test__start_subtest("sockmap create_update_free"))
@ -997,4 +1041,6 @@ void test_sockmap_basic(void)
test_skmsg_helpers_with_link(BPF_MAP_TYPE_SOCKMAP);
if (test__start_subtest("sockhash sk_msg attach sockhash helpers with link"))
test_skmsg_helpers_with_link(BPF_MAP_TYPE_SOCKHASH);
if (test__start_subtest("sockmap skb_verdict vsock poll"))
test_sockmap_skb_verdict_vsock_poll();
}