From: Feng Zhou <zhoufeng.zf@bytedance.com>

At cg_skb hook point, can get classid for v1 or v2, allowing
users to do more functions such as acl.

Signed-off-by: Feng Zhou <zhoufeng.zf@bytedance.com>
---
 net/core/filter.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/net/core/filter.c b/net/core/filter.c
index e4a4454df5f9..a4aa39b6dbba 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -8115,6 +8115,10 @@ cg_skb_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
 		return &bpf_get_listener_sock_proto;
 	case BPF_FUNC_skb_ecn_set_ce:
 		return &bpf_skb_ecn_set_ce_proto;
+#endif
+#ifdef CONFIG_CGROUP_NET_CLASSID
+	case BPF_FUNC_skb_cgroup_classid:
+		return &bpf_skb_cgroup_classid_proto;
 #endif
 	default:
 		return sk_filter_func_proto(func_id, prog);
-- 
2.30.2