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Date: Thu, 13 Jun 2013 11:24:33 -0700
From: Pravin B Shelar <pshelar@...ira.com>
To: netdev@...r.kernel.org, dev@...nvswitch.org
Cc: Pravin B Shelar <pshelar@...ira.com>
Subject: [PATCH net-next 04/12] gre: export gre_handle_offloads() function.
This is required for OVS GRE offloading.
Signed-off-by: Pravin B Shelar <pshelar@...ira.com>
---
include/net/gre.h | 1 +
net/ipv4/gre.c | 29 +++++++++++++++++++++++++++++
net/ipv4/ip_gre.c | 34 ++--------------------------------
3 files changed, 32 insertions(+), 32 deletions(-)
diff --git a/include/net/gre.h b/include/net/gre.h
index cbb9d51..a5a4ddf 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 1cbc465..5ecc9c4 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 362c7c4..c326e86 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;
--
1.7.1
--
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