[PATCH v3 4/6] net: filter: run cgroup eBPF ingress programs
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STALE3703d
SUPERSEDED
From: Daniel Mack <daniel@zonque.org>
Date: 2016-08-26 19:59:03
Subsystem:
bpf [general] (safe dynamic programs and tools), bpf [networking] (tcx & tc bpf, sock_addr), networking [general], the rest · Maintainers:
Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Status: Superseded by v4 (posted 2016-09-06). [go to v4]
Revision v3 (4 revisions archived).
Revisions (4)
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@zonque.org> --- net/core/filter.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/net/core/filter.c b/net/core/filter.c
index bc04e5c..163f75b 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c@@ -78,6 +78,11 @@ 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_ATTACH_TYPE_CGROUP_INET_INGRESS); + if (err) + return err; + err = security_sock_rcv_skb(sk, skb); if (err) return err;
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2.5.5