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authorNikita V. Shirokov <tehnerd@tehnerd.com>2018-11-20 20:55:57 -0800
committerDaniel Borkmann <daniel@iogearbox.net>2018-11-21 23:33:22 +0100
commitb1957c92eba5acad7d8a0a6f968561e08714e978 (patch)
treed13cf3862141d170631ec5371b3b5982000b6866 /tools/testing/selftests/bpf
parentbpf: adding support for map in map in libbpf (diff)
downloadlinux-dev-b1957c92eba5acad7d8a0a6f968561e08714e978.tar.xz
linux-dev-b1957c92eba5acad7d8a0a6f968561e08714e978.zip
bpf: adding tests for map_in_map helpber in libbpf
adding test/example of bpf_map__set_inner_map_fd usage Signed-off-by: Nikita V. Shirokov <tehnerd@tehnerd.com> Acked-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools/testing/selftests/bpf')
-rw-r--r--tools/testing/selftests/bpf/Makefile3
-rw-r--r--tools/testing/selftests/bpf/test_map_in_map.c49
-rw-r--r--tools/testing/selftests/bpf/test_maps.c90
3 files changed, 141 insertions, 1 deletions
diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index 1dde03ea1484..43157bd89165 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -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 \
diff --git a/tools/testing/selftests/bpf/test_map_in_map.c b/tools/testing/selftests/bpf/test_map_in_map.c
new file mode 100644
index 000000000000..ce923e67e08e
--- /dev/null
+++ b/tools/testing/selftests/bpf/test_map_in_map.c
@@ -0,0 +1,49 @@
+// 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";
diff --git a/tools/testing/selftests/bpf/test_maps.c b/tools/testing/selftests/bpf/test_maps.c
index 9f0a5b16a246..9c79ee017df3 100644
--- a/tools/testing/selftests/bpf/test_maps.c
+++ b/tools/testing/selftests/bpf/test_maps.c
@@ -1125,6 +1125,94 @@ out_sockmap:
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)