From: Stanislav Fomichev <sdf@google.com>
Date: Tue, 28 Jul 2020 17:31:04 -0700
Subject: selftests/bpf: Verify socket storage in cgroup/sock_{create, release}
Patch-mainline: v5.9-rc1
Git-commit: 4fb5f94911405b6d2645d4384c2ae1215bfc6a76
References: bsc#1177028
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: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20200729003104.1280813-2-sdf@google.com
Acked-by: Gary Lin <glin@suse.com>
---
tools/testing/selftests/bpf/progs/udp_limit.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
--- a/tools/testing/selftests/bpf/progs/udp_limit.c
+++ b/tools/testing/selftests/bpf/progs/udp_limit.c
@@ -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;