diff options
Diffstat (limited to 'tcp_vu.c')
| -rw-r--r-- | tcp_vu.c | 8 |
1 files changed, 6 insertions, 2 deletions
@@ -129,6 +129,7 @@ int tcp_vu_send_flag(const struct ctx *c, struct tcp_tap_conn *conn, int flags) struct vu_virtq_element flags_elem[2]; struct iov_tail payload, l2frame; int elem_cnt, dup_elem_cnt = 0; + uint32_t csum_flags = IP4_CSUM; struct iovec flags_iov[64]; struct tcp_syn_opts opts; struct tcphdr th = { 0 }; @@ -138,6 +139,9 @@ int tcp_vu_send_flag(const struct ctx *c, struct tcp_tap_conn *conn, int flags) uint32_t seq; int ret; + if (*c->pcap || !vu_has_feature(vdev, VIRTIO_NET_F_GUEST_CSUM)) + csum_flags |= TCP_CSUM; + hdrlen = tcp_vu_hdrlen(CONN_V6(conn)); elem_cnt = vu_collect(vdev, vq, &flags_elem[0], 1, @@ -174,7 +178,7 @@ int tcp_vu_send_flag(const struct ctx *c, struct tcp_tap_conn *conn, int flags) iov_from_buf(payload.iov, payload.cnt, payload.off, &opts, optlen); tcp_fill_headers(c, conn, &eh, CONN_V4(conn) ? &ip4h : NULL, CONN_V6(conn) ? &ip6h : NULL, &th, &payload, - optlen, IP4_CSUM | (*c->pcap ? TCP_CSUM : 0), seq); + optlen, csum_flags, seq); vu_pad(flags_elem[0].in_sg, iov_cnt, hdrlen + optlen); @@ -520,7 +524,7 @@ int tcp_vu_data_from_sock(const struct ctx *c, struct tcp_tap_conn *conn) hdrlen = tcp_vu_hdrlen(v6); check = IP4_CSUM; - if (*c->pcap) + if (*c->pcap || !vu_has_feature(vdev, VIRTIO_NET_F_GUEST_CSUM)) check |= TCP_CSUM; for (i = 0, previous_dlen = -1; i < frame_cnt; i++) { struct iovec *iov = &iov_vu[frame[i].idx_iovec]; |