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authorEelco Chaudron <echaudro@redhat.com>2020-03-06 08:59:23 +0000
committerAlexei Starovoitov <ast@kernel.org>2020-03-12 17:47:38 -0700
commitd831ee84bfc9173eecf30dbbc2553ae81b996c60 (patch)
tree52c110beaf9330261d28ed885ea246cb66e39ee8 /kernel/bpf/verifier.c
parent4823b7210b90a10b88b0c56198f894b27a767509 (diff)
bpf: Add bpf_xdp_output() helper
Introduce new helper that reuses existing xdp perf_event output implementation, but can be called from raw_tracepoint programs that receive 'struct xdp_buff *' as a tracepoint argument. Signed-off-by: Eelco Chaudron <echaudro@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Toke Høiland-Jørgensen <toke@redhat.com> Link: https://lore.kernel.org/bpf/158348514556.2239.11050972434793741444.stgit@xdp-tutorial
Diffstat (limited to 'kernel/bpf/verifier.c')
-rw-r--r--kernel/bpf/verifier.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 55d376c53f7d..745f3cfdf3b2 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -3650,7 +3650,8 @@ static int check_map_func_compatibility(struct bpf_verifier_env *env,
if (func_id != BPF_FUNC_perf_event_read &&
func_id != BPF_FUNC_perf_event_output &&
func_id != BPF_FUNC_skb_output &&
- func_id != BPF_FUNC_perf_event_read_value)
+ func_id != BPF_FUNC_perf_event_read_value &&
+ func_id != BPF_FUNC_xdp_output)
goto error;
break;
case BPF_MAP_TYPE_STACK_TRACE:
@@ -3740,6 +3741,7 @@ static int check_map_func_compatibility(struct bpf_verifier_env *env,
case BPF_FUNC_perf_event_output:
case BPF_FUNC_perf_event_read_value:
case BPF_FUNC_skb_output:
+ case BPF_FUNC_xdp_output:
if (map->map_type != BPF_MAP_TYPE_PERF_EVENT_ARRAY)
goto error;
break;