diff options
author | Herbert Xu <herbert@gondor.apana.org.au> | 2009-01-06 21:49:34 +0300 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2009-01-06 21:49:34 +0300 |
commit | 96e93eab20337d063c70d537bd7bc70d90e04fa3 (patch) | |
tree | 6b50a8d19e6c4d99f035dbede3b7836eed5a7d44 /net | |
parent | ff5bfc3584efdadf826a21bc76ef42bdfcf3f612 (diff) | |
download | linux-96e93eab20337d063c70d537bd7bc70d90e04fa3.tar.xz |
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>
Diffstat (limited to 'net')
-rw-r--r-- | net/core/dev.c | 82 |
1 files changed, 59 insertions, 23 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 382df6c09eec..bab8bcedd62e 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2387,7 +2387,7 @@ void napi_gro_flush(struct napi_struct *napi) } EXPORT_SYMBOL(napi_gro_flush); -static int __napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb) +int dev_gro_receive(struct napi_struct *napi, struct sk_buff *skb) { struct sk_buff **pp = NULL; struct packet_type *ptype; @@ -2417,11 +2417,14 @@ static int __napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb) for (p = napi->gro_list; p; p = p->next) { count++; - NAPI_GRO_CB(p)->same_flow = - p->mac_len == mac_len && - !memcmp(skb_mac_header(p), skb_mac_header(skb), - mac_len); - NAPI_GRO_CB(p)->flush = 0; + + if (!NAPI_GRO_CB(p)->same_flow) + continue; + + if (p->mac_len != mac_len || + memcmp(skb_mac_header(p), skb_mac_header(skb), + mac_len)) + NAPI_GRO_CB(p)->same_flow = 0; } pp = ptype->gro_receive(&napi->gro_list, skb); @@ -2463,6 +2466,19 @@ ok: normal: return -1; } +EXPORT_SYMBOL(dev_gro_receive); + +static int __napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb) +{ + struct sk_buff *p; + + for (p = napi->gro_list; p; p = p->next) { + NAPI_GRO_CB(p)->same_flow = 1; + NAPI_GRO_CB(p)->flush = 0; + } + + return dev_gro_receive(napi, skb); +} int napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb) { @@ -2479,11 +2495,26 @@ int napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb) } EXPORT_SYMBOL(napi_gro_receive); -int napi_gro_frags(struct napi_struct *napi, struct napi_gro_fraginfo *info) +void napi_reuse_skb(struct napi_struct *napi, struct sk_buff *skb) +{ + skb_shinfo(skb)->nr_frags = 0; + + skb->len -= skb->data_len; + skb->truesize -= skb->data_len; + skb->data_len = 0; + + __skb_pull(skb, skb_headlen(skb)); + skb_reserve(skb, NET_IP_ALIGN - skb_headroom(skb)); + + napi->skb = skb; +} +EXPORT_SYMBOL(napi_reuse_skb); + +struct sk_buff *napi_fraginfo_skb(struct napi_struct *napi, + struct napi_gro_fraginfo *info) { struct net_device *dev = napi->dev; struct sk_buff *skb = napi->skb; - int err = NET_RX_DROP; napi->skb = NULL; @@ -2503,16 +2534,31 @@ int napi_gro_frags(struct napi_struct *napi, struct napi_gro_fraginfo *info) skb->len += info->len; skb->truesize += info->len; - if (!pskb_may_pull(skb, ETH_HLEN)) - goto reuse; - - err = NET_RX_SUCCESS; + if (!pskb_may_pull(skb, ETH_HLEN)) { + napi_reuse_skb(napi, skb); + goto out; + } skb->protocol = eth_type_trans(skb, dev); skb->ip_summed = info->ip_summed; skb->csum = info->csum; +out: + return skb; +} +EXPORT_SYMBOL(napi_fraginfo_skb); + +int napi_gro_frags(struct napi_struct *napi, struct napi_gro_fraginfo *info) +{ + struct sk_buff *skb = napi_fraginfo_skb(napi, info); + int err = NET_RX_DROP; + + if (!skb) + goto out; + + err = NET_RX_SUCCESS; + switch (__napi_gro_receive(napi, skb)) { case -1: return netif_receive_skb(skb); @@ -2521,17 +2567,7 @@ int napi_gro_frags(struct napi_struct *napi, struct napi_gro_fraginfo *info) goto out; } -reuse: - skb_shinfo(skb)->nr_frags = 0; - - skb->len -= skb->data_len; - skb->truesize -= skb->data_len; - skb->data_len = 0; - - __skb_pull(skb, skb_headlen(skb)); - skb_reserve(skb, NET_IP_ALIGN - skb_headroom(skb)); - - napi->skb = skb; + napi_reuse_skb(napi, skb); out: return err; |