diff options
| -rw-r--r-- | samples/bpf/test_maps.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/samples/bpf/test_maps.c b/samples/bpf/test_maps.c index 5f5fe5332148..ad466ed33093 100644 --- a/samples/bpf/test_maps.c +++ b/samples/bpf/test_maps.c @@ -236,6 +236,94 @@ static void test_arraymap_sanity(int i, void *data) close(map_fd); } +static void test_percpu_arraymap_many_keys(void) +{ + unsigned nr_cpus = sysconf(_SC_NPROCESSORS_CONF); + unsigned nr_keys = 20000; + long values[nr_cpus]; + int key, map_fd, i; + + map_fd = bpf_create_map(BPF_MAP_TYPE_PERCPU_ARRAY, sizeof(key), + sizeof(values[0]), nr_keys); + if (map_fd < 0) { + printf("failed to create per-cpu arraymap '%s'\n", + strerror(errno)); + exit(1); + } + + for (i = 0; i < nr_cpus; i++) + values[i] = i + 10; + + for (key = 0; key < nr_keys; key++) + assert(bpf_update_elem(map_fd, &key, values, BPF_ANY) == 0); + + for (key = 0; key < nr_keys; key++) { + for (i = 0; i < nr_cpus; i++) + values[i] = 0; + assert(bpf_lookup_elem(map_fd, &key, values) == 0); + for (i = 0; i < nr_cpus; i++) + assert(values[i] == i + 10); + } + + close(map_fd); +} + +static void test_percpu_arraymap_sanity(int i, void *data) +{ + unsigned nr_cpus = sysconf(_SC_NPROCESSORS_CONF); + long values[nr_cpus]; + int key, next_key, map_fd; + + map_fd = bpf_create_map(BPF_MAP_TYPE_PERCPU_ARRAY, sizeof(key), + sizeof(values[0]), 2); + if (map_fd < 0) { + printf("failed to create arraymap '%s'\n", strerror(errno)); + exit(1); + } + + for (i = 0; i < nr_cpus; i++) + values[i] = i + 100; + + key = 1; + /* insert key=1 element */ + assert(bpf_update_elem(map_fd, &key, values, BPF_ANY) == 0); + + values[0] = 0; + assert(bpf_update_elem(map_fd, &key, values, BPF_NOEXIST) == -1 && + errno == EEXIST); + + /* check that key=1 can be found */ + assert(bpf_lookup_elem(map_fd, &key, values) == 0 && values[0] == 100); + + key = 0; + /* check that key=0 is also found and zero initialized */ + assert(bpf_lookup_elem(map_fd, &key, values) == 0 && + values[0] == 0 && values[nr_cpus - 1] == 0); + + + /* check that key=2 cannot be inserted due to max_entries limit */ + key = 2; + assert(bpf_update_elem(map_fd, &key, values, BPF_EXIST) == -1 && + errno == E2BIG); + + /* check that key = 2 doesn't exist */ + assert(bpf_lookup_elem(map_fd, &key, values) == -1 && errno == ENOENT); + + /* iterate over two elements */ + assert(bpf_get_next_key(map_fd, &key, &next_key) == 0 && + next_key == 0); + assert(bpf_get_next_key(map_fd, &next_key, &next_key) == 0 && + next_key == 1); + assert(bpf_get_next_key(map_fd, &next_key, &next_key) == -1 && + errno == ENOENT); + + /* delete shouldn't succeed */ + key = 1; + assert(bpf_delete_elem(map_fd, &key) == -1 && errno == EINVAL); + + close(map_fd); +} + #define MAP_SIZE (32 * 1024) static void test_map_large(void) { @@ -305,6 +393,7 @@ static void test_map_stress(void) run_parallel(100, test_hashmap_sanity, NULL); run_parallel(100, test_percpu_hashmap_sanity, NULL); run_parallel(100, test_arraymap_sanity, NULL); + run_parallel(100, test_percpu_arraymap_sanity, NULL); } #define TASKS 1024 @@ -379,6 +468,9 @@ int main(void) test_hashmap_sanity(0, NULL); test_percpu_hashmap_sanity(0, NULL); test_arraymap_sanity(0, NULL); + test_percpu_arraymap_sanity(0, NULL); + test_percpu_arraymap_many_keys(); + test_map_large(); test_map_parallel(); test_map_stress(); |