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Date: Tue, 6 Sep 2016 15:46:06 +0200 From: Daniel Mack <daniel@...que.org> To: htejun@...com, daniel@...earbox.net, ast@...com Cc: davem@...emloft.net, kafai@...com, fw@...len.de, pablo@...filter.org, harald@...hat.com, netdev@...r.kernel.org, sargun@...gun.me, cgroups@...r.kernel.org, Daniel Mack <daniel@...que.org> Subject: [PATCH v4 4/6] net: filter: run cgroup eBPF ingress programs If the cgroup associated with the receiving socket has an eBPF programs installed, run them from sk_filter_trim_cap(). eBPF programs used in this context are expected to either return 1 to let the packet pass, or != 1 to drop them. The programs have access to the full skb, including the MAC headers. Note that cgroup_bpf_run_filter() is stubbed out as static inline nop for !CONFIG_CGROUP_BPF, and is otherwise guarded by a static key if the feature is unused. Signed-off-by: Daniel Mack <daniel@...que.org> --- net/core/filter.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/net/core/filter.c b/net/core/filter.c index 176b6f2..3662c1a 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -78,6 +78,10 @@ int sk_filter_trim_cap(struct sock *sk, struct sk_buff *skb, unsigned int cap) if (skb_pfmemalloc(skb) && !sock_flag(sk, SOCK_MEMALLOC)) return -ENOMEM; + err = cgroup_bpf_run_filter(sk, skb, BPF_CGROUP_INET_INGRESS); + if (err) + return err; + err = security_sock_rcv_skb(sk, skb); if (err) return err; -- 2.5.5
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