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hw/net: Added CSO for IPv6 

Added fix for checksum offload for IPv6 if a backend doesn't
have a virtual header.
This patch is a part of IPv6 fragmentation.

Signed-off-by: Andrew Melnychenko <andrew@daynix.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Andrew 2020-06-29 04:17:59 +03:00 committed by Jason Wang
parent 650181007a
commit 9a8d949245
1 changed files with 12 additions and 3 deletions
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15
hw/net/net_tx_pkt.c
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@ -468,8 +468,8 @@ static void net_tx_pkt_do_sw_csum(struct NetTxPkt *pkt)
/* num of iovec without vhdr */
uint32_t iov_len = pkt->payload_frags + NET_TX_PKT_PL_START_FRAG - 1;
uint16_t csl;
struct ip_header *iphdr;
size_t csum_offset = pkt->virt_hdr.csum_start + pkt->virt_hdr.csum_offset;
uint16_t l3_proto = eth_get_l3_proto(iov, 1, iov->iov_len);
/* Put zero to checksum field */
iov_from_buf(iov, iov_len, csum_offset, &csum, sizeof csum);
@ -477,9 +477,18 @@ static void net_tx_pkt_do_sw_csum(struct NetTxPkt *pkt)
/* Calculate L4 TCP/UDP checksum */
csl = pkt->payload_len;
csum_cntr = 0;
cso = 0;
/* add pseudo header to csum */
iphdr = pkt->vec[NET_TX_PKT_L3HDR_FRAG].iov_base;
csum_cntr = eth_calc_ip4_pseudo_hdr_csum(iphdr, csl, &cso);
if (l3_proto == ETH_P_IP) {
csum_cntr = eth_calc_ip4_pseudo_hdr_csum(
pkt->vec[NET_TX_PKT_L3HDR_FRAG].iov_base,
csl, &cso);
} else if (l3_proto == ETH_P_IPV6) {
csum_cntr = eth_calc_ip6_pseudo_hdr_csum(
pkt->vec[NET_TX_PKT_L3HDR_FRAG].iov_base,
csl, pkt->l4proto, &cso);
}
/* data checksum */
csum_cntr +=