bpf: adding tests for map_in_map helpber in libbpf (b1957c92) · Commits · e / devices / android_kernel_fairphone_FP5

tools/testing/selftests/bpf/Makefile

+2 −1

Original line number	Diff line number	Diff line
		@@ -38,7 +38,8 @@ TEST_GEN_FILES = test_pkt_access.o test_xdp.o test_l4lb.o test_tcp_estats.o test
		test_lwt_seg6local.o sendmsg4_prog.o sendmsg6_prog.o test_lirc_mode2_kern.o \
		get_cgroup_id_kern.o socket_cookie_prog.o test_select_reuseport_kern.o \
		test_skb_cgroup_id_kern.o bpf_flow.o netcnt_prog.o \
		test_sk_lookup_kern.o test_xdp_vlan.o test_queue_map.o test_stack_map.o
		test_sk_lookup_kern.o test_xdp_vlan.o test_queue_map.o test_stack_map.o \
		test_map_in_map.o

		# Order correspond to 'make run_tests' order
		TEST_PROGS := test_kmod.sh \

tools/testing/selftests/bpf/test_map_in_map.c

0 → 100644

+49 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0
		/* Copyright (c) 2018 Facebook */
		#include <stddef.h>
		#include <linux/bpf.h>
		#include <linux/types.h>
		#include "bpf_helpers.h"

		struct bpf_map_def SEC("maps") mim_array = {
		.type = BPF_MAP_TYPE_ARRAY_OF_MAPS,
		.key_size = sizeof(int),
		/* must be sizeof(__u32) for map in map */
		.value_size = sizeof(__u32),
		.max_entries = 1,
		.map_flags = 0,
		};

		struct bpf_map_def SEC("maps") mim_hash = {
		.type = BPF_MAP_TYPE_HASH_OF_MAPS,
		.key_size = sizeof(int),
		/* must be sizeof(__u32) for map in map */
		.value_size = sizeof(__u32),
		.max_entries = 1,
		.map_flags = 0,
		};

		SEC("xdp_mimtest")
		int xdp_mimtest0(struct xdp_md *ctx)
		{
		int value = 123;
		int key = 0;
		void *map;

		map = bpf_map_lookup_elem(&mim_array, &key);
		if (!map)
		return XDP_DROP;

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

		map = bpf_map_lookup_elem(&mim_hash, &key);
		if (!map)
		return XDP_DROP;

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

		return XDP_PASS;
		}

		int _version SEC("version") = 1;
		char _license[] SEC("license") = "GPL";

tools/testing/selftests/bpf/test_maps.c

+90 −0

Original line number	Diff line number	Diff line
		@@ -1125,6 +1125,94 @@ static void test_sockmap(int tasks, void *data)
		exit(1);
		}

		#define MAPINMAP_PROG "./test_map_in_map.o"
		static void test_map_in_map(void)
		{
		struct bpf_program *prog;
		struct bpf_object *obj;
		struct bpf_map *map;
		int mim_fd, fd, err;
		int pos = 0;

		obj = bpf_object__open(MAPINMAP_PROG);

		fd = bpf_create_map(BPF_MAP_TYPE_HASH, sizeof(int), sizeof(int),
		2, 0);
		if (fd < 0) {
		printf("Failed to create hashmap '%s'!\n", strerror(errno));
		exit(1);
		}

		map = bpf_object__find_map_by_name(obj, "mim_array");
		if (IS_ERR(map)) {
		printf("Failed to load array of maps from test prog\n");
		goto out_map_in_map;
		}
		err = bpf_map__set_inner_map_fd(map, fd);
		if (err) {
		printf("Failed to set inner_map_fd for array of maps\n");
		goto out_map_in_map;
		}

		map = bpf_object__find_map_by_name(obj, "mim_hash");
		if (IS_ERR(map)) {
		printf("Failed to load hash of maps from test prog\n");
		goto out_map_in_map;
		}
		err = bpf_map__set_inner_map_fd(map, fd);
		if (err) {
		printf("Failed to set inner_map_fd for hash of maps\n");
		goto out_map_in_map;
		}

		bpf_object__for_each_program(prog, obj) {
		bpf_program__set_xdp(prog);
		}
		bpf_object__load(obj);

		map = bpf_object__find_map_by_name(obj, "mim_array");
		if (IS_ERR(map)) {
		printf("Failed to load array of maps from test prog\n");
		goto out_map_in_map;
		}
		mim_fd = bpf_map__fd(map);
		if (mim_fd < 0) {
		printf("Failed to get descriptor for array of maps\n");
		goto out_map_in_map;
		}

		err = bpf_map_update_elem(mim_fd, &pos, &fd, 0);
		if (err) {
		printf("Failed to update array of maps\n");
		goto out_map_in_map;
		}

		map = bpf_object__find_map_by_name(obj, "mim_hash");
		if (IS_ERR(map)) {
		printf("Failed to load hash of maps from test prog\n");
		goto out_map_in_map;
		}
		mim_fd = bpf_map__fd(map);
		if (mim_fd < 0) {
		printf("Failed to get descriptor for hash of maps\n");
		goto out_map_in_map;
		}

		err = bpf_map_update_elem(mim_fd, &pos, &fd, 0);
		if (err) {
		printf("Failed to update hash of maps\n");
		goto out_map_in_map;
		}

		close(fd);
		bpf_object__close(obj);
		return;

		out_map_in_map:
		close(fd);
		exit(1);
		}

		#define MAP_SIZE (32 * 1024)

		static void test_map_large(void)
		@@ -1600,6 +1688,8 @@ static void run_all_tests(void)

		test_queuemap(0, NULL);
		test_stackmap(0, NULL);

		test_map_in_map();
		}

		int main(void)