Commit bcd1f8a4 authored by Steffen Klassert's avatar Steffen Klassert
Browse files

xfrm: Prepare the GRO codepath for hardware offloading. 



On IPsec hardware offloading, we already get a secpath with
valid state attached when the packet enters the GRO handlers.
So check for hardware offload and skip the state lookup in this
case.

Signed-off-by: default avatarSteffen Klassert <steffen.klassert@secunet.com>
parent f1bd7d65

net/ipv4/esp4_offload.c

+23 −19
Original line number Diff line number Diff line
@@ -43,6 +43,8 @@ static struct sk_buff **esp4_gro_receive(struct sk_buff **head, 
	if ((err = xfrm_parse_spi(skb, IPPROTO_ESP, &spi, &seq)) != 0)

		goto out;



	xo = xfrm_offload(skb);

	if (!xo || !(xo->flags & CRYPTO_DONE)) {

		err = secpath_set(skb);

		if (err)

			goto out;
@@ -64,6 +66,8 @@ static struct sk_buff **esp4_gro_receive(struct sk_buff **head, 
			xfrm_state_put(x);

			goto out;

		}

	}



	xo->flags |= XFRM_GRO;



	XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;

net/ipv6/esp6_offload.c

+23 −19
Original line number Diff line number Diff line
@@ -45,6 +45,8 @@ static struct sk_buff **esp6_gro_receive(struct sk_buff **head, 
	if ((err = xfrm_parse_spi(skb, IPPROTO_ESP, &spi, &seq)) != 0)

		goto out;



	xo = xfrm_offload(skb);

	if (!xo || !(xo->flags & CRYPTO_DONE)) {

		err = secpath_set(skb);

		if (err)

			goto out;
@@ -66,6 +68,8 @@ static struct sk_buff **esp6_gro_receive(struct sk_buff **head, 
			xfrm_state_put(x);

			goto out;

		}

	}



	xo->flags |= XFRM_GRO;



	XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6 = NULL;

net/xfrm/xfrm_input.c

+25 −25
Original line number Diff line number Diff line
@@ -223,11 +223,10 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type) 
			seq = XFRM_SKB_CB(skb)->seq.input.low;

			goto resume;

		}



		/* encap_type < -1 indicates a GRO call. */

		encap_type = 0;

		seq = XFRM_SPI_SKB_CB(skb)->seq;

		goto lock;

	}



		if (xo && (xo->flags & CRYPTO_DONE)) {

			crypto_done = true;
@@ -256,6 +255,7 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type) 
				XFRM_INC_STATS(net, LINUX_MIB_XFRMINHDRERROR);

				goto drop;

			}

		}



		goto lock;

	}

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