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bpf: add helper for retrieving current numa node id

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Use case is mainly for soreuseport to select sockets for the local
numa node, but since generic, lets also add this for other networking
and tracing program types.

Suggested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Borkmann 2016-10-21 12:46:33 +02:00 • committed by David S. Miller
commit 2d0e30c30f
6 changed files with 24 additions and 0 deletions
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6
include/uapi/linux/bpf.h
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@ -426,6 +426,12 @@ enum bpf_func_id {
*/
BPF_FUNC_set_hash_invalid,
/**
* bpf_get_numa_node_id()
* Returns the id of the current NUMA node.
*/
BPF_FUNC_get_numa_node_id,
__BPF_FUNC_MAX_ID,
};