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authorHerbert Xu <herbert@gondor.apana.org.au>2009-04-16 13:02:07 +0400
committerDavid S. Miller <davem@davemloft.net>2009-04-16 13:02:07 +0400
commit76620aafd66f0004829764940c5466144969cffc (patch)
tree38041e6938121b5611546c582cd23f289db047b0 /include
parent861ab44059350e5cab350238606cf8814abab93b (diff)
downloadlinux-76620aafd66f0004829764940c5466144969cffc.tar.xz
gro: New frags interface to avoid copying shinfo
It turns out that copying a 16-byte area at ~800k times a second can be really expensive :) This patch redesigns the frags GRO interface to avoid copying that area twice. The two disciples of the frags interface have been converted. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/linux/if_vlan.h6
-rw-r--r--include/linux/netdevice.h22
2 files changed, 12 insertions, 16 deletions
diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h
index e1ff5b14310e..7ff9af1d0f05 100644
--- a/include/linux/if_vlan.h
+++ b/include/linux/if_vlan.h
@@ -118,8 +118,7 @@ extern int vlan_hwaccel_do_receive(struct sk_buff *skb);
extern int vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp,
unsigned int vlan_tci, struct sk_buff *skb);
extern int vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp,
- unsigned int vlan_tci,
- struct napi_gro_fraginfo *info);
+ unsigned int vlan_tci);
#else
static inline struct net_device *vlan_dev_real_dev(const struct net_device *dev)
@@ -154,8 +153,7 @@ static inline int vlan_gro_receive(struct napi_struct *napi,
}
static inline int vlan_gro_frags(struct napi_struct *napi,
- struct vlan_group *grp, unsigned int vlan_tci,
- struct napi_gro_fraginfo *info)
+ struct vlan_group *grp, unsigned int vlan_tci)
{
return NET_RX_DROP;
}
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 2e7783f4a755..54db3ebf2193 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1047,14 +1047,6 @@ struct packet_type {
struct list_head list;
};
-struct napi_gro_fraginfo {
- skb_frag_t frags[MAX_SKB_FRAGS];
- unsigned int nr_frags;
- unsigned int ip_summed;
- unsigned int len;
- __wsum csum;
-};
-
#include <linux/interrupt.h>
#include <linux/notifier.h>
@@ -1442,12 +1434,18 @@ extern int napi_gro_receive(struct napi_struct *napi,
struct sk_buff *skb);
extern void napi_reuse_skb(struct napi_struct *napi,
struct sk_buff *skb);
-extern struct sk_buff * napi_fraginfo_skb(struct napi_struct *napi,
- struct napi_gro_fraginfo *info);
+extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
extern int napi_frags_finish(struct napi_struct *napi,
struct sk_buff *skb, int ret);
-extern int napi_gro_frags(struct napi_struct *napi,
- struct napi_gro_fraginfo *info);
+extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
+extern int napi_gro_frags(struct napi_struct *napi);
+
+static inline void napi_free_frags(struct napi_struct *napi)
+{
+ kfree_skb(napi->skb);
+ napi->skb = NULL;
+}
+
extern void netif_nit_deliver(struct sk_buff *skb);
extern int dev_valid_name(const char *name);
extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);