Commit 9a8d9492 authored by Andrew's avatar Andrew Committed by Jason Wang
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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: default avatarAndrew Melnychenko <andrew@daynix.com>
Signed-off-by: default avatarJason Wang <jasowang@redhat.com>
parent 65018100

hw/net/net_tx_pkt.c

+12 −3
Original line number Diff line number Diff line
@@ -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 +=