This patch adds network_offset and inner_network_offset to napi_gro_cb, and makes sure both are set correctly. In the common path there's only one write (skb_gro_reset_offset).
Signed-off-by: Richard Gobert richardbgobert@gmail.com --- include/net/gro.h | 18 ++++++++++++++++-- net/8021q/vlan_core.c | 2 ++ net/core/gro.c | 1 + net/ethernet/eth.c | 1 + net/ipv4/af_inet.c | 5 +---- net/ipv4/gre_offload.c | 1 + net/ipv6/ip6_offload.c | 8 ++++---- 7 files changed, 26 insertions(+), 10 deletions(-)
diff --git a/include/net/gro.h b/include/net/gro.h index cb7282bf3d63..9d1389269509 100644 --- a/include/net/gro.h +++ b/include/net/gro.h @@ -86,6 +86,15 @@ struct napi_gro_cb {
/* used to support CHECKSUM_COMPLETE for tunneling protocols */ __wsum csum; + + /* L3 offsets */ + union { + struct { + u16 network_offset; + u16 inner_network_offset; + }; + u16 network_offsets[2]; + }; };
#define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) @@ -171,12 +180,17 @@ static inline void *skb_gro_header(struct sk_buff *skb, unsigned int hlen, return ptr; }
+static inline int skb_gro_network_offset(const struct sk_buff *skb) +{ + return NAPI_GRO_CB(skb)->network_offsets[NAPI_GRO_CB(skb)->encap_mark]; +} + static inline void *skb_gro_network_header(const struct sk_buff *skb) { if (skb_gro_may_pull(skb, skb_gro_offset(skb))) - return skb_gro_header_fast(skb, skb_network_offset(skb)); + return skb_gro_header_fast(skb, skb_gro_network_offset(skb));
- return skb_network_header(skb); + return skb->data + skb_gro_network_offset(skb); }
static inline __wsum inet_gro_compute_pseudo(const struct sk_buff *skb, diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c index 247704cf70af..355cafe23329 100644 --- a/net/8021q/vlan_core.c +++ b/net/8021q/vlan_core.c @@ -478,6 +478,8 @@ static struct sk_buff *vlan_gro_receive(struct list_head *head, if (unlikely(!vhdr)) goto out;
+ NAPI_GRO_CB(skb)->network_offsets[NAPI_GRO_CB(skb)->encap_mark] = hlen; + type = vhdr->h_vlan_encapsulated_proto;
ptype = gro_find_receive_by_type(type); diff --git a/net/core/gro.c b/net/core/gro.c index 7da3df2c634f..2b42138f816c 100644 --- a/net/core/gro.c +++ b/net/core/gro.c @@ -373,6 +373,7 @@ static inline void skb_gro_reset_offset(struct sk_buff *skb, u32 nhoff) const skb_frag_t *frag0; unsigned int headlen;
+ NAPI_GRO_CB(skb)->network_offset = 0; NAPI_GRO_CB(skb)->data_offset = 0; headlen = skb_headlen(skb); NAPI_GRO_CB(skb)->frag0 = skb->data; diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c index 7515e6bcbb7d..e3eca605bcc7 100644 --- a/net/ethernet/eth.c +++ b/net/ethernet/eth.c @@ -441,6 +441,7 @@ struct sk_buff *eth_gro_receive(struct list_head *head, struct sk_buff *skb)
skb_gro_pull(skb, sizeof(*eh)); skb_gro_postpull_rcsum(skb, eh, sizeof(*eh)); + NAPI_GRO_CB(skb)->inner_network_offset = hlen;
pp = indirect_call_gro_receive_inet(ptype->callbacks.gro_receive, ipv6_gro_receive, inet_gro_receive, diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c index 9334b563a88b..c6bb21c27aee 100644 --- a/net/ipv4/af_inet.c +++ b/net/ipv4/af_inet.c @@ -1567,10 +1567,6 @@ struct sk_buff *inet_gro_receive(struct list_head *head, struct sk_buff *skb)
NAPI_GRO_CB(skb)->is_atomic = !!(iph->frag_off & htons(IP_DF)); NAPI_GRO_CB(skb)->flush |= flush; - skb_set_network_header(skb, off); - /* The above will be needed by the transport layer if there is one - * immediately following this IP hdr. - */
/* Note : No need to call skb_gro_postpull_rcsum() here, * as we already checked checksum over ipv4 header was 0 @@ -1596,6 +1592,7 @@ static struct sk_buff *ipip_gro_receive(struct list_head *head, }
NAPI_GRO_CB(skb)->encap_mark = 1; + NAPI_GRO_CB(skb)->inner_network_offset = skb_gro_offset(skb);
return inet_gro_receive(head, skb); } diff --git a/net/ipv4/gre_offload.c b/net/ipv4/gre_offload.c index d4520c3f7c09..ae596285d78c 100644 --- a/net/ipv4/gre_offload.c +++ b/net/ipv4/gre_offload.c @@ -224,6 +224,7 @@ static struct sk_buff *gre_gro_receive(struct list_head *head, /* Adjusted NAPI_GRO_CB(skb)->csum after skb_gro_pull()*/ skb_gro_postpull_rcsum(skb, greh, grehlen);
+ NAPI_GRO_CB(skb)->inner_network_offset = hlen; pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb); flush = 0;
diff --git a/net/ipv6/ip6_offload.c b/net/ipv6/ip6_offload.c index e3a05b84c76a..d9d3a6bed510 100644 --- a/net/ipv6/ip6_offload.c +++ b/net/ipv6/ip6_offload.c @@ -67,7 +67,7 @@ static int ipv6_gro_pull_exthdrs(struct sk_buff *skb, int off, int proto) off += len; }
- skb_gro_pull(skb, off - skb_network_offset(skb)); + skb_gro_pull(skb, off - skb_gro_network_offset(skb)); return proto; }
@@ -236,8 +236,6 @@ INDIRECT_CALLABLE_SCOPE struct sk_buff *ipv6_gro_receive(struct list_head *head, if (unlikely(!iph)) goto out;
- skb_set_network_header(skb, off); - flush += ntohs(iph->payload_len) != skb->len - hlen;
proto = iph->nexthdr; @@ -259,7 +257,7 @@ INDIRECT_CALLABLE_SCOPE struct sk_buff *ipv6_gro_receive(struct list_head *head, NAPI_GRO_CB(skb)->proto = proto;
flush--; - nlen = skb_network_header_len(skb); + nlen = skb_gro_offset(skb) - off;
list_for_each_entry(p, head, list) { const struct ipv6hdr *iph2; @@ -327,6 +325,7 @@ static struct sk_buff *sit_ip6ip6_gro_receive(struct list_head *head, }
NAPI_GRO_CB(skb)->encap_mark = 1; + NAPI_GRO_CB(skb)->inner_network_offset = skb_gro_offset(skb);
return ipv6_gro_receive(head, skb); } @@ -342,6 +341,7 @@ static struct sk_buff *ip4ip6_gro_receive(struct list_head *head, }
NAPI_GRO_CB(skb)->encap_mark = 1; + NAPI_GRO_CB(skb)->inner_network_offset = skb_gro_offset(skb);
return inet_gro_receive(head, skb); }