Commit 0e790cbb authored by Joanne Koong's avatar Joanne Koong Committed by Alexei Starovoitov
Browse files

selftests/bpf: Test for associating multiple elements with the local storage 



This patch adds a few calls to the existing local storage selftest to
test that we can associate multiple elements with the local storage.

The sleepable program's call to bpf_sk_storage_get with sk_storage_map2
will lead to an allocation of a new selem under the GFP_KERNEL flag.

Signed-off-by: default avatarJoanne Koong <joannelkoong@gmail.com>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20220318045553.3091807-3-joannekoong@fb.com
parent b00fa38a

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

+19 −0
Original line number Diff line number Diff line
@@ -36,6 +36,13 @@ struct { 
	__type(value, struct local_storage);

} sk_storage_map SEC(".maps");



struct {

	__uint(type, BPF_MAP_TYPE_SK_STORAGE);

	__uint(map_flags, BPF_F_NO_PREALLOC | BPF_F_CLONE);

	__type(key, int);

	__type(value, struct local_storage);

} sk_storage_map2 SEC(".maps");



struct {

	__uint(type, BPF_MAP_TYPE_TASK_STORAGE);

	__uint(map_flags, BPF_F_NO_PREALLOC);
@@ -115,7 +122,19 @@ int BPF_PROG(socket_bind, struct socket *sock, struct sockaddr *address, 
	if (storage->value != DUMMY_STORAGE_VALUE)

		sk_storage_result = -1;



	/* This tests that we can associate multiple elements

	 * with the local storage.

	 */

	storage = bpf_sk_storage_get(&sk_storage_map2, sock->sk, 0,

				     BPF_LOCAL_STORAGE_GET_F_CREATE);

	if (!storage)

		return 0;



	err = bpf_sk_storage_delete(&sk_storage_map, sock->sk);

	if (err)

		return 0;



	err = bpf_sk_storage_delete(&sk_storage_map2, sock->sk);

	if (!err)

		sk_storage_result = err;