[NET]: Avoid copying writable clones in tunnel drivers

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2007-07-09 15:33:40 -07:00 committed by David S. Miller
parent 4839c52b01
commit cfbba49d80
4 changed files with 8 additions and 5 deletions

View file

@ -809,7 +809,8 @@ static int ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
max_headroom = LL_RESERVED_SPACE(tdev) + gre_hlen;
if (skb_headroom(skb) < max_headroom || skb_cloned(skb) || skb_shared(skb)) {
if (skb_headroom(skb) < max_headroom || skb_shared(skb)||
(skb_cloned(skb) && !skb_clone_writable(skb, 0))) {
struct sk_buff *new_skb = skb_realloc_headroom(skb, max_headroom);
if (!new_skb) {
ip_rt_put(rt);

View file

@ -595,7 +595,8 @@ static int ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
*/
max_headroom = (LL_RESERVED_SPACE(tdev)+sizeof(struct iphdr));
if (skb_headroom(skb) < max_headroom || skb_cloned(skb) || skb_shared(skb)) {
if (skb_headroom(skb) < max_headroom || skb_shared(skb) ||
(skb_cloned(skb) && !skb_clone_writable(skb, 0))) {
struct sk_buff *new_skb = skb_realloc_headroom(skb, max_headroom);
if (!new_skb) {
ip_rt_put(rt);

View file

@ -883,8 +883,8 @@ static int ip6_tnl_xmit2(struct sk_buff *skb,
*/
max_headroom += LL_RESERVED_SPACE(tdev);
if (skb_headroom(skb) < max_headroom ||
skb_cloned(skb) || skb_shared(skb)) {
if (skb_headroom(skb) < max_headroom || skb_shared(skb) ||
(skb_cloned(skb) && !skb_clone_writable(skb, 0))) {
struct sk_buff *new_skb;
if (!(new_skb = skb_realloc_headroom(skb, max_headroom)))

View file

@ -532,7 +532,8 @@ static int ipip6_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
*/
max_headroom = LL_RESERVED_SPACE(tdev)+sizeof(struct iphdr);
if (skb_headroom(skb) < max_headroom || skb_cloned(skb) || skb_shared(skb)) {
if (skb_headroom(skb) < max_headroom || skb_shared(skb) ||
(skb_cloned(skb) && !skb_clone_writable(skb, 0))) {
struct sk_buff *new_skb = skb_realloc_headroom(skb, max_headroom);
if (!new_skb) {
ip_rt_put(rt);