On 4/20/21 12:37 PM, Kumar Kartikeya Dwivedi wrote:
This adds some basic tests for the low level bpf_tc_* API.
Reviewed-by: Toke Høiland-Jørgensen <toke@xxxxxxxxxx>
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@xxxxxxxxx>
---
.../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.c
diff --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.
+
+ 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;
+}
