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bpf: sockmap, add tests for proto updates replace socket

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Add test that replaces the same socket with itself. This exercises a
corner case where old element and new element have the same posck.
Test protocols: TCP, UDP, stream af_unix and dgram af_unix.

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Reviewed-by: Jakub Sitnicki <jakub@cloudflare.com>
Link: https://lore.kernel.org/r/20231221232327.43678-6-john.fastabend@gmail.com
This commit is contained in:
John Fastabend 2023-12-21 15:23:27 -08:00 committed by Martin KaFai Lau
parent f1300467dd
commit bdbca46d3f
1 changed files with 69 additions and 0 deletions
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69
tools/testing/selftests/bpf/prog_tests/sockmap_basic.c
View File

@ -695,6 +695,73 @@ out:
test_sockmap_pass_prog__destroy(skel);
}
static void test_sockmap_same_sock(void)
{
struct test_sockmap_pass_prog *skel;
int stream[2], dgram, udp, tcp;
int i, err, map, zero = 0;
skel = test_sockmap_pass_prog__open_and_load();
if (!ASSERT_OK_PTR(skel, "open_and_load"))
return;
map = bpf_map__fd(skel->maps.sock_map_rx);
dgram = xsocket(AF_UNIX, SOCK_DGRAM, 0);
if (dgram < 0) {
test_sockmap_pass_prog__destroy(skel);
return;
}
tcp = connected_socket_v4();
if (!ASSERT_GE(tcp, 0, "connected_socket_v4")) {
close(dgram);
test_sockmap_pass_prog__destroy(skel);
return;
}
udp = xsocket(AF_INET, SOCK_DGRAM | SOCK_NONBLOCK, 0);
if (udp < 0) {
close(dgram);
close(tcp);
test_sockmap_pass_prog__destroy(skel);
return;
}
err = socketpair(AF_UNIX, SOCK_STREAM, 0, stream);
ASSERT_OK(err, "socketpair(af_unix, sock_stream)");
if (err)
goto out;
for (i = 0; i < 2; i++) {
err = bpf_map_update_elem(map, &zero, &stream[0], BPF_ANY);
ASSERT_OK(err, "bpf_map_update_elem(stream)");
}
for (i = 0; i < 2; i++) {
err = bpf_map_update_elem(map, &zero, &dgram, BPF_ANY);
ASSERT_OK(err, "bpf_map_update_elem(dgram)");
}
for (i = 0; i < 2; i++) {
err = bpf_map_update_elem(map, &zero, &udp, BPF_ANY);
ASSERT_OK(err, "bpf_map_update_elem(udp)");
}
for (i = 0; i < 2; i++) {
err = bpf_map_update_elem(map, &zero, &tcp, BPF_ANY);
ASSERT_OK(err, "bpf_map_update_elem(tcp)");
}
err = bpf_map_delete_elem(map, &zero);
ASSERT_OK(err, "bpf_map_delete_elem(entry)");
close(stream[0]);
close(stream[1]);
out:
close(dgram);
close(tcp);
close(udp);
test_sockmap_pass_prog__destroy(skel);
}
void test_sockmap_basic(void)
{
if (test__start_subtest("sockmap create_update_free"))
@ -743,4 +810,6 @@ void test_sockmap_basic(void)
test_sockmap_many_socket();
if (test__start_subtest("sockmap one socket to many maps"))
test_sockmap_many_maps();
if (test__start_subtest("sockmap same socket replace"))
test_sockmap_same_sock();
}