Commit 4fb5f949 authored by Stanislav Fomichev's avatar Stanislav Fomichev Committed by Daniel Borkmann
Browse files

selftests/bpf: Verify socket storage in cgroup/sock_{create, release} 



Augment udp_limit test to set and verify socket storage value.
That should be enough to exercise the changes from the previous
patch.

Signed-off-by: default avatarStanislav Fomichev <sdf@google.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Acked-by: default avatarSong Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20200729003104.1280813-2-sdf@google.com
parent f7c6cb1d

tools/testing/selftests/bpf/progs/udp_limit.c

+19 −0
Original line number Diff line number Diff line
@@ -6,14 +6,28 @@ 


int invocations = 0, in_use = 0;



struct {

	__uint(type, BPF_MAP_TYPE_SK_STORAGE);

	__uint(map_flags, BPF_F_NO_PREALLOC);

	__type(key, int);

	__type(value, int);

} sk_map SEC(".maps");



SEC("cgroup/sock_create")

int sock(struct bpf_sock *ctx)

{

	int *sk_storage;

	__u32 key;



	if (ctx->type != SOCK_DGRAM)

		return 1;



	sk_storage = bpf_sk_storage_get(&sk_map, ctx, 0,

					BPF_SK_STORAGE_GET_F_CREATE);

	if (!sk_storage)

		return 0;

	*sk_storage = 0xdeadbeef;



	__sync_fetch_and_add(&invocations, 1);



	if (in_use > 0) {
@@ -31,11 +45,16 @@ int sock(struct bpf_sock *ctx) 
SEC("cgroup/sock_release")

int sock_release(struct bpf_sock *ctx)

{

	int *sk_storage;

	__u32 key;



	if (ctx->type != SOCK_DGRAM)

		return 1;



	sk_storage = bpf_sk_storage_get(&sk_map, ctx, 0, 0);

	if (!sk_storage || *sk_storage != 0xdeadbeef)

		return 0;



	__sync_fetch_and_add(&invocations, 1);

	__sync_fetch_and_add(&in_use, -1);

	return 1;