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ixgbe: Add support for IPv6 and UDP to ixgbe_get_headlen

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This change adds support for IPv6 and UDP to ixgbe_get_headlen. The
advantage to this is that we can now handle ipv4/UDP, ipv6/TCP, and
ipv6/UDP with a single memcpy instead of having to do them in multiple
pskb_may_pull calls.

A quick bit of testing shows that we increase throughput for a single
session of netperf from 8800Mpbs to about 9300Mpbs in the case of ipv6/TCP.
As such overall ipv6 performance should improve with this change.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Stephen Ko  <stephen.s.ko@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Alexander Duyck 2012-05-24 08:26:29 +00:00 • committed by Jeff Kirsher
commit a048b40e0f
1 changed files with 14 additions and 1 deletions
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15
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
View file

@ -1244,6 +1244,7 @@ static unsigned int ixgbe_get_headlen(unsigned char *data,
struct vlan_hdr *vlan;
/* l3 headers */
struct iphdr *ipv4;
struct ipv6hdr *ipv6;
} hdr;
__be16 protocol;
u8 nexthdr = 0; /* default to not TCP */
@ -1284,6 +1285,13 @@ static unsigned int ixgbe_get_headlen(unsigned char *data,
/* record next protocol */
nexthdr = hdr.ipv4->protocol;
hdr.network += hlen;
} else if (protocol == __constant_htons(ETH_P_IPV6)) {
if ((hdr.network - data) > (max_len - sizeof(struct ipv6hdr)))
return max_len;
/* record next protocol */
nexthdr = hdr.ipv6->nexthdr;
hdr.network += sizeof(struct ipv6hdr);
#ifdef IXGBE_FCOE
} else if (protocol == __constant_htons(ETH_P_FCOE)) {
if ((hdr.network - data) > (max_len - FCOE_HEADER_LEN))
@ -1294,7 +1302,7 @@ static unsigned int ixgbe_get_headlen(unsigned char *data,
return hdr.network - data;
}
/* finally sort out TCP */
/* finally sort out TCP/UDP */
if (nexthdr == IPPROTO_TCP) {
if ((hdr.network - data) > (max_len - sizeof(struct tcphdr)))
return max_len;
@ -1307,6 +1315,11 @@ static unsigned int ixgbe_get_headlen(unsigned char *data,
return hdr.network - data;
hdr.network += hlen;
} else if (nexthdr == IPPROTO_UDP) {
if ((hdr.network - data) > (max_len - sizeof(struct udphdr)))
return max_len;
hdr.network += sizeof(struct udphdr);
}
/*