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authorPravin B Shelar <pshelar@nicira.com>2013-06-17 17:49:51 -0700
committerDavid S. Miller <davem@davemloft.net>2013-06-19 18:07:41 -0700
commit45f2e9976cb6fc3f1cc533fd53fe74da5a9dbce4 (patch)
treeb3d9024dcadfbd9443ac50047c6643754c0d435b
parent752f36da68e9136df8918461d651723a43627e04 (diff)
gre: export gre_handle_offloads() function.
This is required for OVS GRE offloading. Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/net/gre.h1
-rw-r--r--net/ipv4/gre.c29
-rw-r--r--net/ipv4/ip_gre.c34
3 files changed, 32 insertions, 32 deletions
diff --git a/include/net/gre.h b/include/net/gre.h
index cbb9d51d82c1..a5a4ddf05300 100644
--- a/include/net/gre.h
+++ b/include/net/gre.h
@@ -34,6 +34,7 @@ int gre_cisco_register(struct gre_cisco_protocol *proto);
int gre_cisco_unregister(struct gre_cisco_protocol *proto);
void gre_build_header(struct sk_buff *skb, const struct tnl_ptk_info *tpi,
int hdr_len);
+struct sk_buff *gre_handle_offloads(struct sk_buff *skb, bool gre_csum);
static inline int ip_gre_calc_hlen(__be16 o_flags)
{
diff --git a/net/ipv4/gre.c b/net/ipv4/gre.c
index 1cbc46536d1f..5ecc9c49b4dc 100644
--- a/net/ipv4/gre.c
+++ b/net/ipv4/gre.c
@@ -93,6 +93,35 @@ void gre_build_header(struct sk_buff *skb, const struct tnl_ptk_info *tpi,
}
EXPORT_SYMBOL_GPL(gre_build_header);
+struct sk_buff *gre_handle_offloads(struct sk_buff *skb, bool gre_csum)
+{
+ int err;
+
+ if (likely(!skb->encapsulation)) {
+ skb_reset_inner_headers(skb);
+ skb->encapsulation = 1;
+ }
+
+ if (skb_is_gso(skb)) {
+ err = skb_unclone(skb, GFP_ATOMIC);
+ if (unlikely(err))
+ goto error;
+ skb_shinfo(skb)->gso_type |= SKB_GSO_GRE;
+ return skb;
+ } else if (skb->ip_summed == CHECKSUM_PARTIAL && gre_csum) {
+ err = skb_checksum_help(skb);
+ if (unlikely(err))
+ goto error;
+ } else if (skb->ip_summed != CHECKSUM_PARTIAL)
+ skb->ip_summed = CHECKSUM_NONE;
+
+ return skb;
+error:
+ kfree_skb(skb);
+ return ERR_PTR(err);
+}
+EXPORT_SYMBOL_GPL(gre_handle_offloads);
+
static __sum16 check_checksum(struct sk_buff *skb)
{
__sum16 csum = 0;
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index 362c7c4c13ca..c326e869993a 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -223,31 +223,6 @@ static int ipgre_rcv(struct sk_buff *skb, const struct tnl_ptk_info *tpi)
return PACKET_REJECT;
}
-static struct sk_buff *handle_offloads(struct ip_tunnel *tunnel, struct sk_buff *skb)
-{
- int err;
-
- if (skb_is_gso(skb)) {
- err = skb_unclone(skb, GFP_ATOMIC);
- if (unlikely(err))
- goto error;
- skb_shinfo(skb)->gso_type |= SKB_GSO_GRE;
- return skb;
- } else if (skb->ip_summed == CHECKSUM_PARTIAL &&
- tunnel->parms.o_flags&TUNNEL_CSUM) {
- err = skb_checksum_help(skb);
- if (unlikely(err))
- goto error;
- } else if (skb->ip_summed != CHECKSUM_PARTIAL)
- skb->ip_summed = CHECKSUM_NONE;
-
- return skb;
-
-error:
- kfree_skb(skb);
- return ERR_PTR(err);
-}
-
static void __gre_xmit(struct sk_buff *skb, struct net_device *dev,
const struct iphdr *tnl_params,
__be16 proto)
@@ -255,11 +230,6 @@ static void __gre_xmit(struct sk_buff *skb, struct net_device *dev,
struct ip_tunnel *tunnel = netdev_priv(dev);
struct tnl_ptk_info tpi;
- if (likely(!skb->encapsulation)) {
- skb_reset_inner_headers(skb);
- skb->encapsulation = 1;
- }
-
tpi.flags = tunnel->parms.o_flags;
tpi.proto = proto;
tpi.key = tunnel->parms.o_key;
@@ -279,7 +249,7 @@ static netdev_tx_t ipgre_xmit(struct sk_buff *skb,
struct ip_tunnel *tunnel = netdev_priv(dev);
const struct iphdr *tnl_params;
- skb = handle_offloads(tunnel, skb);
+ skb = gre_handle_offloads(skb, !!(tunnel->parms.o_flags&TUNNEL_CSUM));
if (IS_ERR(skb))
goto out;
@@ -318,7 +288,7 @@ static netdev_tx_t gre_tap_xmit(struct sk_buff *skb,
{
struct ip_tunnel *tunnel = netdev_priv(dev);
- skb = handle_offloads(tunnel, skb);
+ skb = gre_handle_offloads(skb, !!(tunnel->parms.o_flags&TUNNEL_CSUM));
if (IS_ERR(skb))
goto out;