gro: Add internal interfaces for VLAN
Previously GRO's only entry point from the outside is through napi_gro_receive and napi_gro_frags. These interfaces are for device drivers. This patch rearranges things to provide a new set of interfaces for VLANs. These interfaces are for internal use only. The VLAN code itself can then provide a set of entry points for device drivers. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -1373,8 +1373,14 @@ extern int netif_rx_ni(struct sk_buff *skb);
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#define HAVE_NETIF_RECEIVE_SKB 1
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extern int netif_receive_skb(struct sk_buff *skb);
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extern void napi_gro_flush(struct napi_struct *napi);
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extern int dev_gro_receive(struct napi_struct *napi,
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struct sk_buff *skb);
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extern int napi_gro_receive(struct napi_struct *napi,
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struct sk_buff *skb);
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extern void napi_reuse_skb(struct napi_struct *napi,
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struct sk_buff *skb);
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extern struct sk_buff * napi_fraginfo_skb(struct napi_struct *napi,
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struct napi_gro_fraginfo *info);
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extern int napi_gro_frags(struct napi_struct *napi,
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struct napi_gro_fraginfo *info);
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extern void netif_nit_deliver(struct sk_buff *skb);
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@ -2387,7 +2387,7 @@ void napi_gro_flush(struct napi_struct *napi)
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}
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EXPORT_SYMBOL(napi_gro_flush);
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static int __napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
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int dev_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
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{
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struct sk_buff **pp = NULL;
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struct packet_type *ptype;
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@ -2417,11 +2417,14 @@ static int __napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
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for (p = napi->gro_list; p; p = p->next) {
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count++;
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NAPI_GRO_CB(p)->same_flow =
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p->mac_len == mac_len &&
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!memcmp(skb_mac_header(p), skb_mac_header(skb),
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mac_len);
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NAPI_GRO_CB(p)->flush = 0;
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if (!NAPI_GRO_CB(p)->same_flow)
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continue;
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if (p->mac_len != mac_len ||
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memcmp(skb_mac_header(p), skb_mac_header(skb),
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mac_len))
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NAPI_GRO_CB(p)->same_flow = 0;
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}
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pp = ptype->gro_receive(&napi->gro_list, skb);
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@ -2463,6 +2466,19 @@ ok:
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normal:
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return -1;
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}
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EXPORT_SYMBOL(dev_gro_receive);
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static int __napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
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{
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struct sk_buff *p;
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for (p = napi->gro_list; p; p = p->next) {
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NAPI_GRO_CB(p)->same_flow = 1;
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NAPI_GRO_CB(p)->flush = 0;
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}
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return dev_gro_receive(napi, skb);
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}
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int napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
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{
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@ -2479,11 +2495,26 @@ int napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
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}
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EXPORT_SYMBOL(napi_gro_receive);
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int napi_gro_frags(struct napi_struct *napi, struct napi_gro_fraginfo *info)
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void napi_reuse_skb(struct napi_struct *napi, struct sk_buff *skb)
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{
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skb_shinfo(skb)->nr_frags = 0;
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skb->len -= skb->data_len;
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skb->truesize -= skb->data_len;
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skb->data_len = 0;
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__skb_pull(skb, skb_headlen(skb));
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skb_reserve(skb, NET_IP_ALIGN - skb_headroom(skb));
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napi->skb = skb;
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}
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EXPORT_SYMBOL(napi_reuse_skb);
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struct sk_buff *napi_fraginfo_skb(struct napi_struct *napi,
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struct napi_gro_fraginfo *info)
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{
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struct net_device *dev = napi->dev;
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struct sk_buff *skb = napi->skb;
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int err = NET_RX_DROP;
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napi->skb = NULL;
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@ -2503,16 +2534,31 @@ int napi_gro_frags(struct napi_struct *napi, struct napi_gro_fraginfo *info)
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skb->len += info->len;
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skb->truesize += info->len;
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if (!pskb_may_pull(skb, ETH_HLEN))
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goto reuse;
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err = NET_RX_SUCCESS;
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if (!pskb_may_pull(skb, ETH_HLEN)) {
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napi_reuse_skb(napi, skb);
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goto out;
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}
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skb->protocol = eth_type_trans(skb, dev);
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skb->ip_summed = info->ip_summed;
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skb->csum = info->csum;
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out:
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return skb;
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}
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EXPORT_SYMBOL(napi_fraginfo_skb);
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int napi_gro_frags(struct napi_struct *napi, struct napi_gro_fraginfo *info)
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{
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struct sk_buff *skb = napi_fraginfo_skb(napi, info);
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int err = NET_RX_DROP;
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if (!skb)
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goto out;
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err = NET_RX_SUCCESS;
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switch (__napi_gro_receive(napi, skb)) {
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case -1:
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return netif_receive_skb(skb);
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@ -2521,17 +2567,7 @@ int napi_gro_frags(struct napi_struct *napi, struct napi_gro_fraginfo *info)
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goto out;
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}
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reuse:
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skb_shinfo(skb)->nr_frags = 0;
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skb->len -= skb->data_len;
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skb->truesize -= skb->data_len;
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skb->data_len = 0;
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__skb_pull(skb, skb_headlen(skb));
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skb_reserve(skb, NET_IP_ALIGN - skb_headroom(skb));
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napi->skb = skb;
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napi_reuse_skb(napi, skb);
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out:
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return err;
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