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authorFlorian Westphal <fw@strlen.de>2015-08-26 22:17:39 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-10-01 11:36:25 +0200
commitbbd7b7ff10f4d49ffdc2f9fa8310c8d380039739 (patch)
treea1faf4659171b109bdee5f4d504190f8b8547ea9 /net
parentf7600bc155c49ec97830743b4b91288858d01d2d (diff)
net: gso: use feature flag argument in all protocol gso handlers
[ Upstream commit 1e16aa3ddf863c6b9f37eddf52503230a62dedb3 ] skb_gso_segment() has a 'features' argument representing offload features available to the output path. A few handlers, e.g. GRE, instead re-fetch the features of skb->dev and use those instead of the provided ones when handing encapsulation/tunnels. Depending on dev->hw_enc_features of the output device skb_gso_segment() can then return NULL even when the caller has disabled all GSO feature bits, as segmentation of inner header thinks device will take care of segmentation. This e.g. affects the tbf scheduler, which will silently drop GRE-encap GSO skbs that did not fit the remaining token quota as the segmentation does not work when device supports corresponding hw offload capabilities. Cc: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net> [jay.vosburgh: backported to 3.14. ] Signed-off-by: Jay Vosburgh <jay.vosburgh@canonical.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/af_inet.c2
-rw-r--r--net/ipv4/gre_offload.c2
-rw-r--r--net/ipv4/udp.c2
-rw-r--r--net/ipv6/ip6_offload.c2
-rw-r--r--net/mpls/mpls_gso.c2
5 files changed, 5 insertions, 5 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 951fe55b1671..f4c804dbd3b4 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1291,7 +1291,7 @@ static struct sk_buff *inet_gso_segment(struct sk_buff *skb,
encap = SKB_GSO_CB(skb)->encap_level > 0;
if (encap)
- features = skb->dev->hw_enc_features & netif_skb_features(skb);
+ features &= skb->dev->hw_enc_features;
SKB_GSO_CB(skb)->encap_level += ihl;
skb_reset_transport_header(skb);
diff --git a/net/ipv4/gre_offload.c b/net/ipv4/gre_offload.c
index 278836f1a5ad..0da513e7730a 100644
--- a/net/ipv4/gre_offload.c
+++ b/net/ipv4/gre_offload.c
@@ -69,7 +69,7 @@ static struct sk_buff *gre_gso_segment(struct sk_buff *skb,
skb->mac_len = skb_inner_network_offset(skb);
/* segment inner packet. */
- enc_features = skb->dev->hw_enc_features & netif_skb_features(skb);
+ enc_features = skb->dev->hw_enc_features & features;
segs = skb_mac_gso_segment(skb, enc_features);
if (!segs || IS_ERR(segs)) {
skb_gso_error_unwind(skb, protocol, ghl, mac_offset, mac_len);
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 947dcae8a77a..6970e36ad7b8 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -2517,7 +2517,7 @@ struct sk_buff *skb_udp_tunnel_segment(struct sk_buff *skb,
skb->protocol = htons(ETH_P_TEB);
/* segment inner packet. */
- enc_features = skb->dev->hw_enc_features & netif_skb_features(skb);
+ enc_features = skb->dev->hw_enc_features & features;
segs = skb_mac_gso_segment(skb, enc_features);
if (!segs || IS_ERR(segs)) {
skb_gso_error_unwind(skb, protocol, tnl_hlen, mac_offset,
diff --git a/net/ipv6/ip6_offload.c b/net/ipv6/ip6_offload.c
index b2f091566f88..dc46ebae1987 100644
--- a/net/ipv6/ip6_offload.c
+++ b/net/ipv6/ip6_offload.c
@@ -112,7 +112,7 @@ static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb,
encap = SKB_GSO_CB(skb)->encap_level > 0;
if (encap)
- features = skb->dev->hw_enc_features & netif_skb_features(skb);
+ features &= skb->dev->hw_enc_features;
SKB_GSO_CB(skb)->encap_level += sizeof(*ipv6h);
ipv6h = ipv6_hdr(skb);
diff --git a/net/mpls/mpls_gso.c b/net/mpls/mpls_gso.c
index 851cd880b0c0..0c970cbe0405 100644
--- a/net/mpls/mpls_gso.c
+++ b/net/mpls/mpls_gso.c
@@ -47,7 +47,7 @@ static struct sk_buff *mpls_gso_segment(struct sk_buff *skb,
__skb_push(skb, skb->mac_len);
/* Segment inner packet. */
- mpls_features = skb->dev->mpls_features & netif_skb_features(skb);
+ mpls_features = skb->dev->mpls_features & features;
segs = skb_mac_gso_segment(skb, mpls_features);