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sctp: only check for ECN if peer is using it

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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>
This commit is contained in:
Marcelo Ricardo Leitner 2016-07-13 15:09:00 -03:00 committed by David S. Miller
parent d9cef42529
commit 2d47fd120d
1 changed files with 2 additions and 3 deletions
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5
net/sctp/sm_statefuns.c
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@ -6118,12 +6118,11 @@ static int sctp_eat_data(const struct sctp_association *asoc,
* 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));