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| author | David S. Miller <davem@davemloft.net> | 2016-04-09 23:41:41 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-04-09 23:41:41 +0200 |
| commit | ae95d7126104591348d37aaf78c8325967e02386 (patch) | |
| tree | 3270712f030549d77d4c55246d056e02b9def29d /net/ipv4 | |
| parent | ipv6: fix inet6_lookup_listener() (diff) | |
| parent | Merge tag 'tty-4.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/greg... (diff) | |
| download | linux-ae95d7126104591348d37aaf78c8325967e02386.tar.xz linux-ae95d7126104591348d37aaf78c8325967e02386.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/fou.c | 6 | ||||
| -rw-r--r-- | net/ipv4/gre_offload.c | 8 | ||||
| -rw-r--r-- | net/ipv4/ip_gre.c | 13 |
3 files changed, 24 insertions, 3 deletions
diff --git a/net/ipv4/fou.c b/net/ipv4/fou.c index 5738b9771067..d039f8fff57f 100644 --- a/net/ipv4/fou.c +++ b/net/ipv4/fou.c @@ -202,6 +202,9 @@ static struct sk_buff **fou_gro_receive(struct sock *sk, */ NAPI_GRO_CB(skb)->encap_mark = 0; + /* Flag this frame as already having an outer encap header */ + NAPI_GRO_CB(skb)->is_fou = 1; + rcu_read_lock(); offloads = NAPI_GRO_CB(skb)->is_ipv6 ? inet6_offloads : inet_offloads; ops = rcu_dereference(offloads[proto]); @@ -367,6 +370,9 @@ static struct sk_buff **gue_gro_receive(struct sock *sk, */ NAPI_GRO_CB(skb)->encap_mark = 0; + /* Flag this frame as already having an outer encap header */ + NAPI_GRO_CB(skb)->is_fou = 1; + rcu_read_lock(); offloads = NAPI_GRO_CB(skb)->is_ipv6 ? inet6_offloads : inet_offloads; ops = rcu_dereference(offloads[guehdr->proto_ctype]); diff --git a/net/ipv4/gre_offload.c b/net/ipv4/gre_offload.c index c47539d04b88..6a5bd4317866 100644 --- a/net/ipv4/gre_offload.c +++ b/net/ipv4/gre_offload.c @@ -150,6 +150,14 @@ static struct sk_buff **gre_gro_receive(struct sk_buff **head, if ((greh->flags & ~(GRE_KEY|GRE_CSUM)) != 0) goto out; + /* We can only support GRE_CSUM if we can track the location of + * the GRE header. In the case of FOU/GUE we cannot because the + * outer UDP header displaces the GRE header leaving us in a state + * of limbo. + */ + if ((greh->flags & GRE_CSUM) && NAPI_GRO_CB(skb)->is_fou) + goto out; + type = greh->protocol; rcu_read_lock(); diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index 31936d387cfd..af5d1f38217f 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -862,9 +862,16 @@ static void __gre_tunnel_init(struct net_device *dev) dev->hw_features |= GRE_FEATURES; if (!(tunnel->parms.o_flags & TUNNEL_SEQ)) { - /* TCP offload with GRE SEQ is not supported. */ - dev->features |= NETIF_F_GSO_SOFTWARE; - dev->hw_features |= NETIF_F_GSO_SOFTWARE; + /* TCP offload with GRE SEQ is not supported, nor + * can we support 2 levels of outer headers requiring + * an update. + */ + if (!(tunnel->parms.o_flags & TUNNEL_CSUM) || + (tunnel->encap.type == TUNNEL_ENCAP_NONE)) { + dev->features |= NETIF_F_GSO_SOFTWARE; + dev->hw_features |= NETIF_F_GSO_SOFTWARE; + } + /* Can use a lockless transmit, unless we generate * output sequences */ |