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Driver: Vmxnet3: Copy TCP header to mapped frame for IPv6 packets

소스 검색 
Allows for packet parsing to be done by the fast path. This performance
optimization already exists for IPv4. Add similar logic for IPv6.

Signed-off-by: Amitabha Banerjee <banerjeea@vmware.com>
Signed-off-by: Shrikrishna Khare <skhare@vmware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Shrikrishna Khare
2015-02-28 20:33:09 -08:00
committed by David S. Miller
부모 68932f7188
커밋 759c9359ae
2개의 변경된 파일과 24개의 추가작업 그리고 12개의 파일을 삭제
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31
drivers/net/vmxnet3/vmxnet3_drv.c
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@@ -819,6 +819,7 @@ vmxnet3_parse_and_copy_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
struct vmxnet3_adapter *adapter)
{
struct Vmxnet3_TxDataDesc *tdd;
u8 protocol = 0;
if (ctx->mss) { /* TSO */
ctx->eth_ip_hdr_size = skb_transport_offset(skb);
@@ -831,16 +832,25 @@ vmxnet3_parse_and_copy_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
if (ctx->ipv4) {
const struct iphdr *iph = ip_hdr(skb);
if (iph->protocol == IPPROTO_TCP)
ctx->l4_hdr_size = tcp_hdrlen(skb);
else if (iph->protocol == IPPROTO_UDP)
ctx->l4_hdr_size = sizeof(struct udphdr);
else
ctx->l4_hdr_size = 0;
} else {
/* for simplicity, don't copy L4 headers */
ctx->l4_hdr_size = 0;
protocol = iph->protocol;
} else if (ctx->ipv6) {
const struct ipv6hdr *ipv6h = ipv6_hdr(skb);
protocol = ipv6h->nexthdr;
}
switch (protocol) {
case IPPROTO_TCP:
ctx->l4_hdr_size = tcp_hdrlen(skb);
break;
case IPPROTO_UDP:
ctx->l4_hdr_size = sizeof(struct udphdr);
break;
default:
ctx->l4_hdr_size = 0;
break;
}
ctx->copy_size = min(ctx->eth_ip_hdr_size +
ctx->l4_hdr_size, skb->len);
} else {
@@ -887,7 +897,7 @@ vmxnet3_prepare_tso(struct sk_buff *skb,
iph->check = 0;
tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 0,
IPPROTO_TCP, 0);
} else {
} else if (ctx->ipv6) {
struct ipv6hdr *iph = ipv6_hdr(skb);
tcph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, 0,
@@ -938,6 +948,7 @@ vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
count = txd_estimate(skb);
ctx.ipv4 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IP));
ctx.ipv6 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IPV6));
ctx.mss = skb_shinfo(skb)->gso_size;
if (ctx.mss) {