commit 03e69b508b6f7c51743055c9f61d1dfeadf4b635
author Daniel Borkmann <daniel@iogearbox.net> Sat Mar 14 02:27:16 2015 +0100
committer David S. Miller <davem@davemloft.net> Sun Mar 15 21:57:25 2015 -0400
tree 4c9199cde0fe876871e20352666d40721d4c1d5f
parent 12028820423bd7705beb5e09889faab95c545ea1

ebpf: add prandom helper for packet sampling

This work is similar to commit 4cd3675ebf74 ("filter: added BPF
random opcode") and adds a possibility for packet sampling in eBPF.

Currently, this is only possible in classic BPF and useful to
combine sampling with f.e. packet sockets, possible also with tc.

Example function proto-type looks like:

  u32 (*prandom_u32)(void) = (void *)BPF_FUNC_get_prandom_u32;

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>