Re: [PATCH bpf-next v3 3/3] libbpf: add selftests for TC-BPF API
From: Yonghong Song <hidden>
Date: 2021-04-21 07:02:47
Also in:
bpf
On 4/20/21 12:37 PM, Kumar Kartikeya Dwivedi wrote:
quoted hunk ↗ jump to hunk
This adds some basic tests for the low level bpf_tc_* API. Reviewed-by: Toke Høiland-Jørgensen <redacted> Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> --- .../selftests/bpf/prog_tests/test_tc_bpf.c | 169 ++++++++++++++++++ .../selftests/bpf/progs/test_tc_bpf_kern.c | 12 ++ 2 files changed, 181 insertions(+) create mode 100644 tools/testing/selftests/bpf/prog_tests/test_tc_bpf.c create mode 100644 tools/testing/selftests/bpf/progs/test_tc_bpf_kern.cdiff --git a/tools/testing/selftests/bpf/prog_tests/test_tc_bpf.c b/tools/testing/selftests/bpf/prog_tests/test_tc_bpf.c new file mode 100644 index 000000000000..563a3944553c --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/test_tc_bpf.c@@ -0,0 +1,169 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include <linux/bpf.h> +#include <linux/err.h> +#include <linux/limits.h> +#include <bpf/libbpf.h> +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <test_progs.h> +#include <linux/if_ether.h> + +#define LO_IFINDEX 1 +
[...]
+
+void test_test_tc_bpf(void)
+{
+ const char *file = "./test_tc_bpf_kern.o";
+ struct bpf_program *clsp;
+ struct bpf_object *obj;
+ int cls_fd, ret;
+
+ obj = bpf_object__open(file);
+ if (!ASSERT_OK_PTR(obj, "bpf_object__open"))
+ return;
+
+ clsp = bpf_object__find_program_by_title(obj, "classifier");
+ if (!ASSERT_OK_PTR(clsp, "bpf_object__find_program_by_title"))
+ goto end;Please use bpf_object__find_program_by_name() API.
quoted hunk ↗ jump to hunk
+ + ret = bpf_object__load(obj); + if (!ASSERT_EQ(ret, 0, "bpf_object__load")) + goto end; + + cls_fd = bpf_program__fd(clsp); + + system("tc qdisc del dev lo clsact"); + + ret = test_tc_internal(cls_fd, BPF_TC_CLSACT_INGRESS); + if (!ASSERT_EQ(ret, 0, "test_tc_internal INGRESS")) + goto end; + + if (!ASSERT_EQ(system("tc qdisc del dev lo clsact"), 0, + "clsact qdisc delete failed")) + goto end; + + ret = test_tc_info(cls_fd); + if (!ASSERT_EQ(ret, 0, "test_tc_info")) + goto end; + + if (!ASSERT_EQ(system("tc qdisc del dev lo clsact"), 0, + "clsact qdisc delete failed")) + goto end; + + ret = test_tc_internal(cls_fd, BPF_TC_CLSACT_EGRESS); + if (!ASSERT_EQ(ret, 0, "test_tc_internal EGRESS")) + goto end; + + ASSERT_EQ(system("tc qdisc del dev lo clsact"), 0, + "clsact qdisc delete failed"); + +end: + bpf_object__close(obj); +}diff --git a/tools/testing/selftests/bpf/progs/test_tc_bpf_kern.c b/tools/testing/selftests/bpf/progs/test_tc_bpf_kern.c new file mode 100644 index 000000000000..18a3a7ed924a --- /dev/null +++ b/tools/testing/selftests/bpf/progs/test_tc_bpf_kern.c@@ -0,0 +1,12 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include <linux/bpf.h> +#include <bpf/bpf_helpers.h> + +/* Dummy prog to test TC-BPF API */ + +SEC("classifier") +int cls(struct __sk_buff *skb) +{ + return 0; +}