Commit 8937bd80 authored Aug 11, 2016 by Alexei Starovoitov Committed by David S. Miller Aug 12, 2016

bpf: allow bpf_get_prandom_u32() to be used in tracing



bpf_get_prandom_u32() was initially introduced for socket filters
and later requested numberous times to be added to tracing bpf programs
for the same reason as in socket filters: to be able to randomly
select incoming events.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 1633ac0a

kernel/trace/bpf_trace.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -437,6 +437,8 @@ static const struct bpf_func_proto *tracing_func_proto(enum bpf_func_id func_id)
		return bpf_get_probe_write_proto();
		case BPF_FUNC_current_task_under_cgroup:
		return &bpf_current_task_under_cgroup_proto;
		case BPF_FUNC_get_prandom_u32:
		return &bpf_get_prandom_u32_proto;
		default:
		return NULL;
		}