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Date: Sat, 31 Jan 2015 19:11:54 +0200
From: "Michael S. Tsirkin" <mst@...hat.com>
To: Vladislav Yasevich <vyasevich@...il.com>
Cc: netdev@...r.kernel.org, virtualization@...ts.linux-foundation.org,
ben@...adent.org.uk, eric.dumazet@...il.com,
hannes@...essinduktion.org,
Vladislav Yasevich <vyasevic@...hat.com>
Subject: Re: [PATCH v2 3/3] Revert "drivers/net: Disable UFO through virtio"
On Fri, Jan 30, 2015 at 02:27:27PM -0500, Vladislav Yasevich wrote:
> This reverts commit 3d0ad09412ffe00c9afa201d01effdb6023d09b4.
>
> Now that GSO functionality can correctly track if the fragment
> id has been selected and select a fragment id if necessary,
> we can re-enable UFO on tap/macvap and virtio devices.
>
> Signed-off-by: Vladislav Yasevich <vyasevic@...hat.com>
Acked-by: Michael S. Tsirkin <mst@...hat.com>
> ---
> drivers/net/macvtap.c | 13 ++++++++-----
> drivers/net/tun.c | 19 ++++++++-----------
> drivers/net/virtio_net.c | 24 ++++++++++--------------
> 3 files changed, 26 insertions(+), 30 deletions(-)
>
> diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c
> index 0b86e46..919f4fc 100644
> --- a/drivers/net/macvtap.c
> +++ b/drivers/net/macvtap.c
> @@ -80,7 +80,7 @@ static struct cdev macvtap_cdev;
> static const struct proto_ops macvtap_socket_ops;
>
> #define TUN_OFFLOADS (NETIF_F_HW_CSUM | NETIF_F_TSO_ECN | NETIF_F_TSO | \
> - NETIF_F_TSO6)
> + NETIF_F_TSO6 | NETIF_F_UFO)
> #define RX_OFFLOADS (NETIF_F_GRO | NETIF_F_LRO)
> #define TAP_FEATURES (NETIF_F_GSO | NETIF_F_SG)
>
> @@ -585,8 +585,6 @@ static int macvtap_skb_from_vnet_hdr(struct macvtap_queue *q,
> gso_type = SKB_GSO_TCPV6;
> break;
> case VIRTIO_NET_HDR_GSO_UDP:
> - pr_warn_once("macvtap: %s: using disabled UFO feature; please fix this program\n",
> - current->comm);
> gso_type = SKB_GSO_UDP;
> break;
> default:
> @@ -633,6 +631,8 @@ static void macvtap_skb_to_vnet_hdr(struct macvtap_queue *q,
> vnet_hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
> else if (sinfo->gso_type & SKB_GSO_TCPV6)
> vnet_hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
> + else if (sinfo->gso_type & SKB_GSO_UDP)
> + vnet_hdr->gso_type = VIRTIO_NET_HDR_GSO_UDP;
> else
> BUG();
> if (sinfo->gso_type & SKB_GSO_TCP_ECN)
> @@ -962,6 +962,9 @@ static int set_offload(struct macvtap_queue *q, unsigned long arg)
> if (arg & TUN_F_TSO6)
> feature_mask |= NETIF_F_TSO6;
> }
> +
> + if (arg & TUN_F_UFO)
> + feature_mask |= NETIF_F_UFO;
> }
>
> /* tun/tap driver inverts the usage for TSO offloads, where
> @@ -972,7 +975,7 @@ static int set_offload(struct macvtap_queue *q, unsigned long arg)
> * When user space turns off TSO, we turn off GSO/LRO so that
> * user-space will not receive TSO frames.
> */
> - if (feature_mask & (NETIF_F_TSO | NETIF_F_TSO6))
> + if (feature_mask & (NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_UFO))
> features |= RX_OFFLOADS;
> else
> features &= ~RX_OFFLOADS;
> @@ -1087,7 +1090,7 @@ static long macvtap_ioctl(struct file *file, unsigned int cmd,
> case TUNSETOFFLOAD:
> /* let the user check for future flags */
> if (arg & ~(TUN_F_CSUM | TUN_F_TSO4 | TUN_F_TSO6 |
> - TUN_F_TSO_ECN))
> + TUN_F_TSO_ECN | TUN_F_UFO))
> return -EINVAL;
>
> rtnl_lock();
> diff --git a/drivers/net/tun.c b/drivers/net/tun.c
> index 5ca42b7..10f9e40 100644
> --- a/drivers/net/tun.c
> +++ b/drivers/net/tun.c
> @@ -186,7 +186,7 @@ struct tun_struct {
> struct net_device *dev;
> netdev_features_t set_features;
> #define TUN_USER_FEATURES (NETIF_F_HW_CSUM|NETIF_F_TSO_ECN|NETIF_F_TSO| \
> - NETIF_F_TSO6)
> + NETIF_F_TSO6|NETIF_F_UFO)
>
> int vnet_hdr_sz;
> int sndbuf;
> @@ -1176,18 +1176,8 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile,
> skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
> break;
> case VIRTIO_NET_HDR_GSO_UDP:
> - {
> - static bool warned;
> -
> - if (!warned) {
> - warned = true;
> - netdev_warn(tun->dev,
> - "%s: using disabled UFO feature; please fix this program\n",
> - current->comm);
> - }
> skb_shinfo(skb)->gso_type = SKB_GSO_UDP;
> break;
> - }
> default:
> tun->dev->stats.rx_frame_errors++;
> kfree_skb(skb);
> @@ -1294,6 +1284,8 @@ static ssize_t tun_put_user(struct tun_struct *tun,
> gso.gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
> else if (sinfo->gso_type & SKB_GSO_TCPV6)
> gso.gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
> + else if (sinfo->gso_type & SKB_GSO_UDP)
> + gso.gso_type = VIRTIO_NET_HDR_GSO_UDP;
> else {
> pr_err("unexpected GSO type: "
> "0x%x, gso_size %d, hdr_len %d\n",
> @@ -1742,6 +1734,11 @@ static int set_offload(struct tun_struct *tun, unsigned long arg)
> features |= NETIF_F_TSO6;
> arg &= ~(TUN_F_TSO4|TUN_F_TSO6);
> }
> +
> + if (arg & TUN_F_UFO) {
> + features |= NETIF_F_UFO;
> + arg &= ~TUN_F_UFO;
> + }
> }
>
> /* This gives the user a way to test for new features in future by
> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
> index 5ca9771..059fdf1 100644
> --- a/drivers/net/virtio_net.c
> +++ b/drivers/net/virtio_net.c
> @@ -490,17 +490,8 @@ static void receive_buf(struct virtnet_info *vi, struct receive_queue *rq,
> skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
> break;
> case VIRTIO_NET_HDR_GSO_UDP:
> - {
> - static bool warned;
> -
> - if (!warned) {
> - warned = true;
> - netdev_warn(dev,
> - "host using disabled UFO feature; please fix it\n");
> - }
> skb_shinfo(skb)->gso_type = SKB_GSO_UDP;
> break;
> - }
> case VIRTIO_NET_HDR_GSO_TCPV6:
> skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
> break;
> @@ -888,6 +879,8 @@ static int xmit_skb(struct send_queue *sq, struct sk_buff *skb)
> hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
> else if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
> hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
> + else if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP)
> + hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_UDP;
> else
> BUG();
> if (skb_shinfo(skb)->gso_type & SKB_GSO_TCP_ECN)
> @@ -1748,7 +1741,7 @@ static int virtnet_probe(struct virtio_device *vdev)
> dev->features |= NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST;
>
> if (virtio_has_feature(vdev, VIRTIO_NET_F_GSO)) {
> - dev->hw_features |= NETIF_F_TSO
> + dev->hw_features |= NETIF_F_TSO | NETIF_F_UFO
> | NETIF_F_TSO_ECN | NETIF_F_TSO6;
> }
> /* Individual feature bits: what can host handle? */
> @@ -1758,9 +1751,11 @@ static int virtnet_probe(struct virtio_device *vdev)
> dev->hw_features |= NETIF_F_TSO6;
> if (virtio_has_feature(vdev, VIRTIO_NET_F_HOST_ECN))
> dev->hw_features |= NETIF_F_TSO_ECN;
> + if (virtio_has_feature(vdev, VIRTIO_NET_F_HOST_UFO))
> + dev->hw_features |= NETIF_F_UFO;
>
> if (gso)
> - dev->features |= dev->hw_features & NETIF_F_ALL_TSO;
> + dev->features |= dev->hw_features & (NETIF_F_ALL_TSO|NETIF_F_UFO);
> /* (!csum && gso) case will be fixed by register_netdev() */
> }
> if (virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_CSUM))
> @@ -1798,7 +1793,8 @@ static int virtnet_probe(struct virtio_device *vdev)
> /* If we can receive ANY GSO packets, we must allocate large ones. */
> if (virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_TSO4) ||
> virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_TSO6) ||
> - virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_ECN))
> + virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_ECN) ||
> + virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_UFO))
> vi->big_packets = true;
>
> if (virtio_has_feature(vdev, VIRTIO_NET_F_MRG_RXBUF))
> @@ -1994,9 +1990,9 @@ static struct virtio_device_id id_table[] = {
> static unsigned int features[] = {
> VIRTIO_NET_F_CSUM, VIRTIO_NET_F_GUEST_CSUM,
> VIRTIO_NET_F_GSO, VIRTIO_NET_F_MAC,
> - VIRTIO_NET_F_HOST_TSO4, VIRTIO_NET_F_HOST_TSO6,
> + VIRTIO_NET_F_HOST_TSO4, VIRTIO_NET_F_HOST_UFO, VIRTIO_NET_F_HOST_TSO6,
> VIRTIO_NET_F_HOST_ECN, VIRTIO_NET_F_GUEST_TSO4, VIRTIO_NET_F_GUEST_TSO6,
> - VIRTIO_NET_F_GUEST_ECN,
> + VIRTIO_NET_F_GUEST_ECN, VIRTIO_NET_F_GUEST_UFO,
> VIRTIO_NET_F_MRG_RXBUF, VIRTIO_NET_F_STATUS, VIRTIO_NET_F_CTRL_VQ,
> VIRTIO_NET_F_CTRL_RX, VIRTIO_NET_F_CTRL_VLAN,
> VIRTIO_NET_F_GUEST_ANNOUNCE, VIRTIO_NET_F_MQ,
> --
> 1.9.3
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