selftests/bpf: add simple BPF_PROG_TEST_RUN examples for flow dissector

Use existing pkt_v4 and pkt_v6 to make sure flow_keys are what we want.

Also, add new bpf_flow_load routine (and flow_dissector_load.h header)
that loads bpf_flow.o program and does all required setup.

Signed-off-by: Stanislav Fomichev <sdf@google.com>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

1 files changed, 5 insertions, 38 deletions

diff --git a/tools/testing/selftests/bpf/flow_dissector_load.c b/tools/testing/selftests/bpf/flow_dissector_load.c
index ae8180b11d5f..77cafa66d048 100644
--- a/tools/testing/selftests/bpf/flow_dissector_load.c
+++ b/tools/testing/selftests/bpf/flow_dissector_load.c
@@ -12,6 +12,7 @@
 #include <bpf/libbpf.h>
 
 #include "bpf_rlimit.h"
+#include "flow_dissector_load.h"
 
 const char *cfg_pin_path = "/sys/fs/bpf/flow_dissector";
 const char *cfg_map_name = "jmp_table";
@@ -21,46 +22,13 @@ char *cfg_path_name;
 
 static void load_and_attach_program(void)
 {
-	struct bpf_program *prog, *main_prog;
-	struct bpf_map *prog_array;
-	int i, fd, prog_fd, ret;
+	int prog_fd, ret;
 	struct bpf_object *obj;
-	int prog_array_fd;
 
-	ret = bpf_prog_load(cfg_path_name, BPF_PROG_TYPE_FLOW_DISSECTOR, &obj,
-			    &prog_fd);
+	ret = bpf_flow_load(&obj, cfg_path_name, cfg_section_name,
+			    cfg_map_name, &prog_fd);
 	if (ret)
-		error(1, 0, "bpf_prog_load %s", cfg_path_name);
-
-	main_prog = bpf_object__find_program_by_title(obj, cfg_section_name);
-	if (!main_prog)
-		error(1, 0, "bpf_object__find_program_by_title %s",
-		      cfg_section_name);
-
-	prog_fd = bpf_program__fd(main_prog);
-	if (prog_fd < 0)
-		error(1, 0, "bpf_program__fd");
-
-	prog_array = bpf_object__find_map_by_name(obj, cfg_map_name);
-	if (!prog_array)
-		error(1, 0, "bpf_object__find_map_by_name %s", cfg_map_name);
-
-	prog_array_fd = bpf_map__fd(prog_array);
-	if (prog_array_fd < 0)
-		error(1, 0, "bpf_map__fd %s", cfg_map_name);
-
-	i = 0;
-	bpf_object__for_each_program(prog, obj) {
-		fd = bpf_program__fd(prog);
-		if (fd < 0)
-			error(1, 0, "bpf_program__fd");
-
-		if (fd != prog_fd) {
-			printf("%d: %s\n", i, bpf_program__title(prog, false));
-			bpf_map_update_elem(prog_array_fd, &i, &fd, BPF_ANY);
-			++i;
-		}
-	}
+		error(1, 0, "bpf_flow_load %s", cfg_path_name);
 
 	ret = bpf_prog_attach(prog_fd, 0 /* Ignore */, BPF_FLOW_DISSECTOR, 0);
 	if (ret)
@@ -69,7 +37,6 @@ static void load_and_attach_program(void)
 	ret = bpf_object__pin(obj, cfg_pin_path);
 	if (ret)
 		error(1, 0, "bpf_object__pin %s", cfg_pin_path);
-
 }
 
 static void detach_program(void)