Commit dc0565ce authored by Li RongQing's avatar Li RongQing Committed by Steffen Klassert
Browse files

xfrm: slightly optimise xfrm_input 



Check x->km.state with XFRM_STATE_ACQ only when state is not
XFRM_STAT_VALID, not everytime

Signed-off-by: default avatarLi RongQing <roy.qing.li@gmail.com>
Signed-off-by: default avatarSteffen Klassert <steffen.klassert@secunet.com>
parent f31e8d4f

net/xfrm/xfrm_input.c

+5 −5
Original line number Diff line number Diff line
@@ -239,13 +239,13 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type) 
		skb->sp->xvec[skb->sp->len++] = x;



		spin_lock(&x->lock);

		if (unlikely(x->km.state == XFRM_STATE_ACQ)) {

			XFRM_INC_STATS(net, LINUX_MIB_XFRMACQUIREERROR);

			goto drop_unlock;

		}



		if (unlikely(x->km.state != XFRM_STATE_VALID)) {

			XFRM_INC_STATS(net, LINUX_MIB_XFRMINSTATEINVALID);

			if (x->km.state == XFRM_STATE_ACQ)

				XFRM_INC_STATS(net, LINUX_MIB_XFRMACQUIREERROR);

			else

				XFRM_INC_STATS(net,

					       LINUX_MIB_XFRMINSTATEINVALID);

			goto drop_unlock;

		}