bpf: introduce new program type for skbs on sockets

A class of programs, run from strparser and soon from a new map type called sock map, are used with skb as the context but on established sockets. By creating a specific program type for these we can use bpf helpers that expect full sockets and get the verifier to ensure these helpers are not used out of context. The new type is BPF_PROG_TYPE_SK_SKB. This patch introduces the infrastructure and type.

John Fastabend committed 9 years ago

Commit b005fd11 parent db5980d3 files · +38 −0Browse files

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include/uapi/linux/bpf.h+1−0

@@ -127,6 +127,7 @@ enum bpf_prog_type { · 126 unmodified lines
127	127	BPF_PROG_TYPE_LWT_OUT,
128	128	BPF_PROG_TYPE_LWT_XMIT,
129	129	BPF_PROG_TYPE_SOCK_OPS,
	130	+ BPF_PROG_TYPE_SK_SKB,
130	131	};
131	132
132	133	enum bpf_attach_type {