[PATCH net 2/2] samples/bpf: add bpf_map_update_elem() tests
From: Alexei Starovoitov <hidden>
Date: 2016-08-05 21:01:31
Subsystem:
bpf [general] (safe dynamic programs and tools), the rest · Maintainers:
Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, Linus Torvalds
increase test coverage to check previously missing 'update when full' Signed-off-by: Alexei Starovoitov <ast@kernel.org> --- samples/bpf/test_maps.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/samples/bpf/test_maps.c b/samples/bpf/test_maps.c
index 47bf0858f9e4..cce2b59751eb 100644
--- a/samples/bpf/test_maps.c
+++ b/samples/bpf/test_maps.c@@ -68,7 +68,16 @@ static void test_hashmap_sanity(int i, void *data) assert(bpf_update_elem(map_fd, &key, &value, BPF_NOEXIST) == -1 && errno == E2BIG); + /* update existing element, thought the map is full */ + key = 1; + assert(bpf_update_elem(map_fd, &key, &value, BPF_EXIST) == 0); + key = 2; + assert(bpf_update_elem(map_fd, &key, &value, BPF_ANY) == 0); + key = 1; + assert(bpf_update_elem(map_fd, &key, &value, BPF_ANY) == 0); + /* check that key = 0 doesn't exist */ + key = 0; assert(bpf_delete_elem(map_fd, &key) == -1 && errno == ENOENT); /* iterate over two elements */
@@ -413,10 +422,12 @@ static void do_work(int fn, void *data) for (i = fn; i < MAP_SIZE; i += TASKS) { key = value = i; - if (do_update) + if (do_update) { assert(bpf_update_elem(map_fd, &key, &value, BPF_NOEXIST) == 0); - else + assert(bpf_update_elem(map_fd, &key, &value, BPF_EXIST) == 0); + } else { assert(bpf_delete_elem(map_fd, &key) == 0); + } } }
--
2.8.0