selftests/bpf: Turn on libbpf 1.0 mode and fix all IS_ERR checks

Turn ony libbpf 1.0 mode. Fix all the explicit IS_ERR checks that now will be
broken because libbpf returns NULL on error (and sets errno). Fix
ASSERT_OK_PTR and ASSERT_ERR_PTR to work for both old mode and new modes and
use them throughout selftests. This is trivial to do by using
libbpf_get_error() API that all libbpf users are supposed to use, instead of
IS_ERR checks.

A bunch of checks also did explicit -1 comparison for various fd-returning
APIs. Such checks are replaced with >= 0 or < 0 cases.

There were also few misuses of bpf_object__find_map_by_name() in test_maps.
Those are fixed in this patch as well.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Link: https://lore.kernel.org/bpf/20210525035935.1461796-3-andrii@kernel.org

1 files changed, 4 insertions, 4 deletions

diff --git a/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c b/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c
index ab77596b64e3..1352ec104149 100644
--- a/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c
+++ b/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c
@@ -88,11 +88,11 @@ static void test_sockmap_create_update_free(enum bpf_map_type map_type)
 	int s, map, err;
 
 	s = connected_socket_v4();
-	if (CHECK_FAIL(s == -1))
+	if (CHECK_FAIL(s < 0))
 		return;
 
 	map = bpf_create_map(map_type, sizeof(int), sizeof(int), 1, 0);
-	if (CHECK_FAIL(map == -1)) {
+	if (CHECK_FAIL(map < 0)) {
 		perror("bpf_create_map");
 		goto out;
 	}
@@ -245,7 +245,7 @@ static void test_sockmap_copy(enum bpf_map_type map_type)
 	opts.link_info = &linfo;
 	opts.link_info_len = sizeof(linfo);
 	link = bpf_program__attach_iter(skel->progs.copy, &opts);
-	if (CHECK(IS_ERR(link), "attach_iter", "attach_iter failed\n"))
+	if (!ASSERT_OK_PTR(link, "attach_iter"))
 		goto out;
 
 	iter_fd = bpf_iter_create(bpf_link__fd(link));
@@ -304,7 +304,7 @@ static void test_sockmap_skb_verdict_attach(enum bpf_attach_type first,
 	}
 
 	err = bpf_prog_attach(verdict, map, second, 0);
-	assert(err == -1 && errno == EBUSY);
+	ASSERT_EQ(err, -EBUSY, "prog_attach_fail");
 
 	err = bpf_prog_detach2(verdict, map, first);
 	if (CHECK_FAIL(err)) {