sctp: only check for ECN if peer is using it
Currently only read-only checks are performed up to the point on where
we check if peer is ECN capable, checks which we can avoid otherwise.
The flag ecn_ce_done is only used to perform this check once per
incoming packet, and nothing more.
Thus this patch moves the peer check up.
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index b7c1f7f..d88bb2b 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -6118,12 +6118,11 @@
* chunk later.
*/
- if (!chunk->ecn_ce_done) {
+ if (asoc->peer.ecn_capable && !chunk->ecn_ce_done) {
struct sctp_af *af = SCTP_INPUT_CB(chunk->skb)->af;
chunk->ecn_ce_done = 1;
- if (af->is_ce(sctp_gso_headskb(chunk->skb)) &&
- asoc->peer.ecn_capable) {
+ if (af->is_ce(sctp_gso_headskb(chunk->skb))) {
/* Do real work as sideffect. */
sctp_add_cmd_sf(commands, SCTP_CMD_ECN_CE,
SCTP_U32(tsn));