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Date: Sat, 31 Oct 2020 11:52:24 -0700
From: Alexander Duyck <alexander.duyck@...il.com>
To: bpf@...r.kernel.org
Cc: ast@...nel.org, daniel@...earbox.net, kafai@...com,
john.fastabend@...il.com, kernel-team@...com,
netdev@...r.kernel.org, edumazet@...gle.com, brakmo@...com,
andrii.nakryiko@...il.com, alexanderduyck@...com
Subject: [bpf-next PATCH v2 3/5] selftests/bpf: Replace EXPECT_EQ with
ASSERT_EQ and refactor verify_results
From: Alexander Duyck <alexanderduyck@...com>
There is already logic in test_progs.h for asserting that a value is
expected to be another value. So instead of reinventing it we should just
make use of ASSERT_EQ in tcpbpf_user.c. This will allow for better
debugging and integrates much more closely with the test_progs framework.
In addition we can refactor the code a bit to merge together the two
verify functions and tie them together into a single function. Doing this
helps to clean the code up a bit and makes it more readable as all the
verification is now done in one function.
Lastly we can relocate the verification to the end of the run_test since it
is logically part of the test itself. With this we can drop the need for a
return value from run_test since verification becomes the last step of the
call and then immediately following is the tear down of the test setup.
Signed-off-by: Alexander Duyck <alexanderduyck@...com>
---
.../testing/selftests/bpf/prog_tests/tcpbpf_user.c | 114 ++++++++------------
1 file changed, 44 insertions(+), 70 deletions(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/tcpbpf_user.c b/tools/testing/selftests/bpf/prog_tests/tcpbpf_user.c
index 17d4299435df..d96f4084d2f5 100644
--- a/tools/testing/selftests/bpf/prog_tests/tcpbpf_user.c
+++ b/tools/testing/selftests/bpf/prog_tests/tcpbpf_user.c
@@ -10,66 +10,58 @@
static __u32 duration;
-#define EXPECT_EQ(expected, actual, fmt) \
- do { \
- if ((expected) != (actual)) { \
- fprintf(stderr, " Value of: " #actual "\n" \
- " Actual: %" fmt "\n" \
- " Expected: %" fmt "\n", \
- (actual), (expected)); \
- ret--; \
- } \
- } while (0)
-
-int verify_result(const struct tcpbpf_globals *result)
-{
- __u32 expected_events;
- int ret = 0;
-
- expected_events = ((1 << BPF_SOCK_OPS_TIMEOUT_INIT) |
- (1 << BPF_SOCK_OPS_RWND_INIT) |
- (1 << BPF_SOCK_OPS_TCP_CONNECT_CB) |
- (1 << BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB) |
- (1 << BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB) |
- (1 << BPF_SOCK_OPS_NEEDS_ECN) |
- (1 << BPF_SOCK_OPS_STATE_CB) |
- (1 << BPF_SOCK_OPS_TCP_LISTEN_CB));
-
- EXPECT_EQ(expected_events, result->event_map, "#" PRIx32);
- EXPECT_EQ(501ULL, result->bytes_received, "llu");
- EXPECT_EQ(1002ULL, result->bytes_acked, "llu");
- EXPECT_EQ(1, result->data_segs_in, PRIu32);
- EXPECT_EQ(1, result->data_segs_out, PRIu32);
- EXPECT_EQ(0x80, result->bad_cb_test_rv, PRIu32);
- EXPECT_EQ(0, result->good_cb_test_rv, PRIu32);
- EXPECT_EQ(1, result->num_listen, PRIu32);
-
- /* 3 comes from one listening socket + both ends of the connection */
- EXPECT_EQ(3, result->num_close_events, PRIu32);
-
- return ret;
-}
-
-int verify_sockopt_result(int sock_map_fd)
+static void verify_result(int map_fd, int sock_map_fd)
{
+ __u32 expected_events = ((1 << BPF_SOCK_OPS_TIMEOUT_INIT) |
+ (1 << BPF_SOCK_OPS_RWND_INIT) |
+ (1 << BPF_SOCK_OPS_TCP_CONNECT_CB) |
+ (1 << BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB) |
+ (1 << BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB) |
+ (1 << BPF_SOCK_OPS_NEEDS_ECN) |
+ (1 << BPF_SOCK_OPS_STATE_CB) |
+ (1 << BPF_SOCK_OPS_TCP_LISTEN_CB));
+ struct tcpbpf_globals result = { 0 };
__u32 key = 0;
- int ret = 0;
int res;
int rv;
+ rv = bpf_map_lookup_elem(map_fd, &key, &result);
+ if (CHECK(rv, "bpf_map_lookup_elem(map_fd)", "err:%d errno:%d",
+ rv, errno))
+ return;
+
+ /* check global map */
+ CHECK(expected_events != result.event_map, "event_map",
+ "unexpected event_map: actual %#" PRIx32" != expected %#" PRIx32 "\n",
+ result.event_map, expected_events);
+
+ ASSERT_EQ(result.bytes_received, 501, "bytes_received");
+ ASSERT_EQ(result.bytes_acked, 1002, "bytes_acked");
+ ASSERT_EQ(result.data_segs_in, 1, "data_segs_in");
+ ASSERT_EQ(result.data_segs_out, 1, "data_segs_out");
+ ASSERT_EQ(result.bad_cb_test_rv, 0x80, "bad_cb_test_rv");
+ ASSERT_EQ(result.good_cb_test_rv, 0, "good_cb_test_rv");
+ ASSERT_EQ(result.num_listen, 1, "num_listen");
+
+ /* 3 comes from one listening socket + both ends of the connection */
+ ASSERT_EQ(result.num_close_events, 3, "num_close_events");
+
/* check setsockopt for SAVE_SYN */
+ key = 0;
rv = bpf_map_lookup_elem(sock_map_fd, &key, &res);
- EXPECT_EQ(0, rv, "d");
- EXPECT_EQ(0, res, "d");
- key = 1;
+ CHECK(rv, "bpf_map_lookup_elem(sock_map_fd)", "err:%d errno:%d",
+ rv, errno);
+ ASSERT_EQ(res, 0, "bpf_setsockopt(TCP_SAVE_SYN)");
+
/* check getsockopt for SAVED_SYN */
+ key = 1;
rv = bpf_map_lookup_elem(sock_map_fd, &key, &res);
- EXPECT_EQ(0, rv, "d");
- EXPECT_EQ(1, res, "d");
- return ret;
+ CHECK(rv, "bpf_map_lookup_elem(sock_map_fd)", "err:%d errno:%d",
+ rv, errno);
+ ASSERT_EQ(res, 1, "bpf_getsockopt(TCP_SAVED_SYN)");
}
-static int run_test(void)
+static void run_test(int map_fd, int sock_map_fd)
{
int listen_fd = -1, cli_fd = -1, accept_fd = -1;
char buf[1000];
@@ -135,18 +127,17 @@ static int run_test(void)
if (listen_fd != -1)
close(listen_fd);
- return err;
+ if (!err)
+ verify_result(map_fd, sock_map_fd);
}
void test_tcpbpf_user(void)
{
const char *file = "test_tcpbpf_kern.o";
int prog_fd, map_fd, sock_map_fd;
- struct tcpbpf_globals g = {0};
int error = EXIT_FAILURE;
struct bpf_object *obj;
int cg_fd = -1;
- __u32 key = 0;
int rv;
cg_fd = test__join_cgroup(CG_NAME);
@@ -173,24 +164,7 @@ void test_tcpbpf_user(void)
if (sock_map_fd < 0)
goto err;
- if (run_test())
- goto err;
-
- rv = bpf_map_lookup_elem(map_fd, &key, &g);
- if (rv != 0) {
- fprintf(stderr, "FAILED: bpf_map_lookup_elem returns %d\n", rv);
- goto err;
- }
-
- if (verify_result(&g)) {
- fprintf(stderr, "FAILED: Wrong stats\n");
- goto err;
- }
-
- if (verify_sockopt_result(sock_map_fd)) {
- fprintf(stderr, "FAILED: Wrong sockopt stats\n");
- goto err;
- }
+ run_test(map_fd, sock_map_fd);
error = 0;
err:
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