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Commit b0b04fc4 authored by Alexei Starovoitov's avatar Alexei Starovoitov Committed by Daniel Borkmann
Browse files

selftests/bpf: add xdp noinline test 



add large semi-artificial XDP test with 18 functions to stress test
bpf call verification logic

Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
Acked-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
parent 3bc35c63

tools/testing/selftests/bpf/Makefile

+2 −1
Original line number Diff line number Diff line
@@ -18,7 +18,7 @@ TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test 
TEST_GEN_FILES = test_pkt_access.o test_xdp.o test_l4lb.o test_tcp_estats.o test_obj_id.o \

	test_pkt_md_access.o test_xdp_redirect.o test_xdp_meta.o sockmap_parse_prog.o     \

	sockmap_verdict_prog.o dev_cgroup.o sample_ret0.o test_tracepoint.o \

	test_l4lb_noinline.o

	test_l4lb_noinline.o test_xdp_noinline.o



TEST_PROGS := test_kmod.sh test_xdp_redirect.sh test_xdp_meta.sh \

	test_offload.py
@@ -54,6 +54,7 @@ CLANG_FLAGS = -I. -I./include/uapi -I../../../include/uapi \ 
	      -Wno-compare-distinct-pointer-types



$(OUTPUT)/test_l4lb_noinline.o: CLANG_FLAGS += -fno-inline

$(OUTPUT)/test_xdp_noinline.o: CLANG_FLAGS += -fno-inline



%.o: %.c

	$(CLANG) $(CLANG_FLAGS) \

tools/testing/selftests/bpf/test_progs.c

+81 −0
Original line number Diff line number Diff line
@@ -257,6 +257,86 @@ static void test_l4lb_all(void) 
	test_l4lb(file2);

}



static void test_xdp_noinline(void)

{

	const char *file = "./test_xdp_noinline.o";

	unsigned int nr_cpus = bpf_num_possible_cpus();

	struct vip key = {.protocol = 6};

	struct vip_meta {

		__u32 flags;

		__u32 vip_num;

	} value = {.vip_num = VIP_NUM};

	__u32 stats_key = VIP_NUM;

	struct vip_stats {

		__u64 bytes;

		__u64 pkts;

	} stats[nr_cpus];

	struct real_definition {

		union {

			__be32 dst;

			__be32 dstv6[4];

		};

		__u8 flags;

	} real_def = {.dst = MAGIC_VAL};

	__u32 ch_key = 11, real_num = 3;

	__u32 duration, retval, size;

	int err, i, prog_fd, map_fd;

	__u64 bytes = 0, pkts = 0;

	struct bpf_object *obj;

	char buf[128];

	u32 *magic = (u32 *)buf;



	err = bpf_prog_load(file, BPF_PROG_TYPE_XDP, &obj, &prog_fd);

	if (err) {

		error_cnt++;

		return;

	}



	map_fd = bpf_find_map(__func__, obj, "vip_map");

	if (map_fd < 0)

		goto out;

	bpf_map_update_elem(map_fd, &key, &value, 0);



	map_fd = bpf_find_map(__func__, obj, "ch_rings");

	if (map_fd < 0)

		goto out;

	bpf_map_update_elem(map_fd, &ch_key, &real_num, 0);



	map_fd = bpf_find_map(__func__, obj, "reals");

	if (map_fd < 0)

		goto out;

	bpf_map_update_elem(map_fd, &real_num, &real_def, 0);



	err = bpf_prog_test_run(prog_fd, NUM_ITER, &pkt_v4, sizeof(pkt_v4),

				buf, &size, &retval, &duration);

	CHECK(err || errno || retval != 1 || size != 54 ||

	      *magic != MAGIC_VAL, "ipv4",

	      "err %d errno %d retval %d size %d magic %x\n",

	      err, errno, retval, size, *magic);



	err = bpf_prog_test_run(prog_fd, NUM_ITER, &pkt_v6, sizeof(pkt_v6),

				buf, &size, &retval, &duration);

	CHECK(err || errno || retval != 1 || size != 74 ||

	      *magic != MAGIC_VAL, "ipv6",

	      "err %d errno %d retval %d size %d magic %x\n",

	      err, errno, retval, size, *magic);



	map_fd = bpf_find_map(__func__, obj, "stats");

	if (map_fd < 0)

		goto out;

	bpf_map_lookup_elem(map_fd, &stats_key, stats);

	for (i = 0; i < nr_cpus; i++) {

		bytes += stats[i].bytes;

		pkts += stats[i].pkts;

	}

	if (bytes != MAGIC_BYTES * NUM_ITER * 2 || pkts != NUM_ITER * 2) {

		error_cnt++;

		printf("test_xdp_noinline:FAIL:stats %lld %lld\n", bytes, pkts);

	}

out:

	bpf_object__close(obj);

}



static void test_tcp_estats(void)

{

	const char *file = "./test_tcp_estats.o";
@@ -766,6 +846,7 @@ int main(void) 
	test_pkt_access();

	test_xdp();

	test_l4lb_all();

	test_xdp_noinline();

	test_tcp_estats();

	test_bpf_obj_id();

	test_pkt_md_access();

tools/testing/selftests/bpf/test_xdp_noinline.c

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