From: Andrey Ignatov Date: Thu, 14 May 2020 20:03:46 +0000 (-0700) Subject: bpf: Allow skb_ancestor_cgroup_id helper in cgroup skb X-Git-Tag: v5.8-rc1~165^2~185^2^2~3 X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=06d3e4c9f11afc849dc201ecf9ef7a43eeb1dddd;p=nvme.git bpf: Allow skb_ancestor_cgroup_id helper in cgroup skb cgroup skb programs already can use bpf_skb_cgroup_id. Allow bpf_skb_ancestor_cgroup_id as well so that container policies can be implemented for a container that can have sub-cgroups dynamically created, but policies should still be implemented based on cgroup id of container itself not on an id of a sub-cgroup. Signed-off-by: Andrey Ignatov Signed-off-by: Alexei Starovoitov Acked-by: Yonghong Song Link: https://lore.kernel.org/bpf/8874194d6041eba190356453ea9f6071edf5f658.1589486450.git.rdna@fb.com --- diff --git a/net/core/filter.c b/net/core/filter.c index 9c3eada5c86c..a47dc5b9dad4 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -6157,6 +6157,8 @@ cg_skb_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog) #ifdef CONFIG_SOCK_CGROUP_DATA case BPF_FUNC_skb_cgroup_id: return &bpf_skb_cgroup_id_proto; + case BPF_FUNC_skb_ancestor_cgroup_id: + return &bpf_skb_ancestor_cgroup_id_proto; #endif #ifdef CONFIG_INET case BPF_FUNC_sk_lookup_tcp: