bpf: add skb->tstamp r/w access from tc clsact and cg skb progs

This could be used to rate limit egress traffic in concert with a qdisc which supports Earliest Departure Time, such as FQ. Write access from cg skb progs only with CAP_SYS_ADMIN, since the value will be used by downstream qdiscs. It might make sense to relax this. Changes v1 -> v2: - allow access from cg skb, write only with CAP_SYS_ADMIN

Vlad Dumitrescu committed 7 years ago

Commit f11216b1 parent ab85b014 files · +60 −0Browse files

Showing the changes to include/uapi/linux (1 of 4 files). Show all

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include/uapi/linux/bpf.h+1−0

@@ -2468,6 +2468,7 @@ struct __sk_buff { · 2467 unmodified lines
2468		2468
2469	__u32 data_meta;	2469	__u32 data_meta;
2470	struct bpf_flow_keys *flow_keys;	2470	struct bpf_flow_keys *flow_keys;
		2471	__u64 tstamp;
2471	};	2472	};
2472		2473
2473	struct bpf_tunnel_key {	2474	struct bpf_tunnel_key {