From 26282e940baeb59c9b62a40631edbc38550f8d8a Mon Sep 17 00:00:00 2001 From: Andrey Ignatov Date: Thu, 14 May 2020 13:03:45 -0700 Subject: [PATCH] UPSTREAM: bpf: Allow sk lookup helpers in cgroup skb Currently sk lookup helpers are allowed in tc, xdp, sk skb, and cgroup sock_addr programs. But they would be useful in cgroup skb as well so that for example cgroup skb ingress program can lookup a peer socket a packet comes from on same host and make a decision whether to allow or deny this packet based on the properties of that socket, e.g. cgroup that peer socket belongs to. Allow the following sk lookup helpers in cgroup skb: * bpf_sk_lookup_tcp; * bpf_sk_lookup_udp; * bpf_sk_release; * bpf_skc_lookup_tcp. Change-Id: I953621beba53c394af02109580f1370581acc6a1 Signed-off-by: Andrey Ignatov Signed-off-by: Alexei Starovoitov Acked-by: Yonghong Song Link: https://lore.kernel.org/bpf/f8c7ee280f1582b586629436d777b6db00597d63.1589486450.git.rdna@fb.com --- net/core/filter.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/net/core/filter.c b/net/core/filter.c index 0eb20ac55c2c..df85b33d54a8 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -6269,6 +6269,14 @@ cg_skb_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog) return &bpf_skb_cgroup_id_proto; #endif #ifdef CONFIG_INET + case BPF_FUNC_sk_lookup_tcp: + return &bpf_sk_lookup_tcp_proto; + case BPF_FUNC_sk_lookup_udp: + return &bpf_sk_lookup_udp_proto; + case BPF_FUNC_sk_release: + return &bpf_sk_release_proto; + case BPF_FUNC_skc_lookup_tcp: + return &bpf_skc_lookup_tcp_proto; case BPF_FUNC_tcp_sock: return &bpf_tcp_sock_proto; case BPF_FUNC_get_listener_sock: