On Fri, Jan 20, 2017 at 02:32:42PM +0800, Jason Wang wrote: > Commit 501db511397f ("virtio: don't set VIRTIO_NET_HDR_F_DATA_VALID on > xmit") in fact disables VIRTIO_HDR_F_DATA_VALID on receiving path too, > fixing this by adding a hint (has_data_valid) and set it only on the > receiving path. > > Cc: Rolf Neugebauer <rolf.neugebauer@xxxxxxxxxx> > Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx> > --- > drivers/net/macvtap.c | 2 +- > drivers/net/tun.c | 2 +- > drivers/net/virtio_net.c | 2 +- > include/linux/virtio_net.h | 6 +++++- > net/packet/af_packet.c | 4 ++-- > 5 files changed, 10 insertions(+), 6 deletions(-) > > diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c > index 5c26653..4026185 100644 > --- a/drivers/net/macvtap.c > +++ b/drivers/net/macvtap.c > @@ -825,7 +825,7 @@ static ssize_t macvtap_put_user(struct macvtap_queue *q, > return -EINVAL; > > if (virtio_net_hdr_from_skb(skb, &vnet_hdr, > - macvtap_is_little_endian(q))) > + macvtap_is_little_endian(q), true)) > BUG(); > > if (copy_to_iter(&vnet_hdr, sizeof(vnet_hdr), iter) != > diff --git a/drivers/net/tun.c b/drivers/net/tun.c > index cd8e02c..2cd10b2 100644 > --- a/drivers/net/tun.c > +++ b/drivers/net/tun.c > @@ -1360,7 +1360,7 @@ static ssize_t tun_put_user(struct tun_struct *tun, > return -EINVAL; > > if (virtio_net_hdr_from_skb(skb, &gso, > - tun_is_little_endian(tun))) { > + tun_is_little_endian(tun), true)) { > struct skb_shared_info *sinfo = skb_shinfo(skb); > pr_err("unexpected GSO type: " > "0x%x, gso_size %d, hdr_len %d\n", > diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c > index 4a10500..3474243 100644 > --- a/drivers/net/virtio_net.c > +++ b/drivers/net/virtio_net.c > @@ -1104,7 +1104,7 @@ static int xmit_skb(struct send_queue *sq, struct sk_buff *skb) > hdr = skb_vnet_hdr(skb); > > if (virtio_net_hdr_from_skb(skb, &hdr->hdr, > - virtio_is_little_endian(vi->vdev))) > + virtio_is_little_endian(vi->vdev), false)) > BUG(); > > if (vi->mergeable_rx_bufs) > diff --git a/include/linux/virtio_net.h b/include/linux/virtio_net.h > index 5643647..5209b5e 100644 > --- a/include/linux/virtio_net.h > +++ b/include/linux/virtio_net.h > @@ -56,7 +56,8 @@ static inline int virtio_net_hdr_to_skb(struct sk_buff *skb, > > static inline int virtio_net_hdr_from_skb(const struct sk_buff *skb, > struct virtio_net_hdr *hdr, > - bool little_endian) > + bool little_endian, > + bool has_data_valid) > { > memset(hdr, 0, sizeof(*hdr)); /* no info leak */ > I would prefer naming it is_rx. Callers should not know about internal details like data valid, the issue we are trying to fix here is that tx and tx headers are slightly different. > @@ -91,6 +92,9 @@ static inline int virtio_net_hdr_from_skb(const struct sk_buff *skb, > skb_checksum_start_offset(skb)); > hdr->csum_offset = __cpu_to_virtio16(little_endian, > skb->csum_offset); > + } else if (has_data_valid && > + skb->ip_summed == CHECKSUM_UNNECESSARY) { > + hdr->flags = VIRTIO_NET_HDR_F_DATA_VALID; > } /* else everything is zero */ > > return 0; > diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c > index b9e1a13..3d555c7 100644 > --- a/net/packet/af_packet.c > +++ b/net/packet/af_packet.c > @@ -1976,7 +1976,7 @@ static int packet_rcv_vnet(struct msghdr *msg, const struct sk_buff *skb, > return -EINVAL; > *len -= sizeof(vnet_hdr); > > - if (virtio_net_hdr_from_skb(skb, &vnet_hdr, vio_le())) > + if (virtio_net_hdr_from_skb(skb, &vnet_hdr, vio_le(), true)) > return -EINVAL; > > return memcpy_to_msg(msg, (void *)&vnet_hdr, sizeof(vnet_hdr)); > @@ -2237,7 +2237,7 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev, > if (po->has_vnet_hdr) { > if (virtio_net_hdr_from_skb(skb, h.raw + macoff - > sizeof(struct virtio_net_hdr), > - vio_le())) { > + vio_le(), true)) { > spin_lock(&sk->sk_receive_queue.lock); > goto drop_n_account; > } > -- > 2.7.4 _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization