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bpf: Add tests for map-in-map

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Test cases for array of maps and hash of maps.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Martin KaFai Lau
2017-03-22 10:00:35 -07:00
committed by David S. Miller
parent bcc6b1b7eb
commit fb30d4b712
9 changed files with 451 additions and 18 deletions
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22
samples/bpf/bpf_load.c
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@@ -43,6 +43,7 @@ struct bpf_map_def {
unsigned int value_size;
unsigned int max_entries;
unsigned int map_flags;
unsigned int inner_map_idx;
};
static int populate_prog_array(const char *event, int prog_fd)
@@ -198,11 +199,22 @@ static int load_maps(struct bpf_map_def *maps, int len)
for (i = 0; i < len / sizeof(struct bpf_map_def); i++) {
map_fd[i] = bpf_create_map(maps[i].type,
maps[i].key_size,
maps[i].value_size,
maps[i].max_entries,
maps[i].map_flags);
if (maps[i].type == BPF_MAP_TYPE_ARRAY_OF_MAPS ||
maps[i].type == BPF_MAP_TYPE_HASH_OF_MAPS) {
int inner_map_fd = map_fd[maps[i].inner_map_idx];
map_fd[i] = bpf_create_map_in_map(maps[i].type,
maps[i].key_size,
inner_map_fd,
maps[i].max_entries,
maps[i].map_flags);
} else {
map_fd[i] = bpf_create_map(maps[i].type,
maps[i].key_size,
maps[i].value_size,
maps[i].max_entries,
maps[i].map_flags);
}
if (map_fd[i] < 0) {
printf("failed to create a map: %d %s\n",
errno, strerror(errno));