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tun: Allow tap device to send/receive UFO packets.

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- Allow setting UFO on tap device and handle UFO packets.

Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>

---------------------------------------------------------
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sridhar Samudrala 2009-07-14 14:21:04 +00:00 committed by David S. Miller
parent 5c5167515d
commit e36aa25a53
2 changed files with 13 additions and 1 deletions
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13
drivers/net/tun.c
View file

@ -641,6 +641,9 @@ static __inline__ ssize_t tun_get_user(struct tun_struct *tun,
case VIRTIO_NET_HDR_GSO_TCPV6: case VIRTIO_NET_HDR_GSO_TCPV6:
skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
break; break;
case VIRTIO_NET_HDR_GSO_UDP:
skb_shinfo(skb)->gso_type = SKB_GSO_UDP;
break;
default: default:
tun->dev->stats.rx_frame_errors++; tun->dev->stats.rx_frame_errors++;
kfree_skb(skb); kfree_skb(skb);
@ -726,6 +729,8 @@ static __inline__ ssize_t tun_put_user(struct tun_struct *tun,
gso.gso_type = VIRTIO_NET_HDR_GSO_TCPV4; gso.gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
else if (sinfo->gso_type & SKB_GSO_TCPV6) else if (sinfo->gso_type & SKB_GSO_TCPV6)
gso.gso_type = VIRTIO_NET_HDR_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 else
BUG(); BUG();
if (sinfo->gso_type & SKB_GSO_TCP_ECN) if (sinfo->gso_type & SKB_GSO_TCP_ECN)
@ -1073,7 +1078,8 @@ static int set_offload(struct net_device *dev, unsigned long arg)
old_features = dev->features; old_features = dev->features;
/* Unset features, set them as we chew on the arg. */ /* Unset features, set them as we chew on the arg. */
features = (old_features & ~(NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST features = (old_features & ~(NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST
|NETIF_F_TSO_ECN|NETIF_F_TSO|NETIF_F_TSO6)); |NETIF_F_TSO_ECN|NETIF_F_TSO|NETIF_F_TSO6
|NETIF_F_UFO));
if (arg & TUN_F_CSUM) { if (arg & TUN_F_CSUM) {
features |= NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST; features |= NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST;
@ -1090,6 +1096,11 @@ static int set_offload(struct net_device *dev, unsigned long arg)
features |= NETIF_F_TSO6; features |= NETIF_F_TSO6;
arg &= ~(TUN_F_TSO4|TUN_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 /* This gives the user a way to test for new features in future by

1
include/linux/if_tun.h
View file

@ -62,6 +62,7 @@
#define TUN_F_TSO4 0x02 /* I can handle TSO for IPv4 packets */ #define TUN_F_TSO4 0x02 /* I can handle TSO for IPv4 packets */
#define TUN_F_TSO6 0x04 /* I can handle TSO for IPv6 packets */ #define TUN_F_TSO6 0x04 /* I can handle TSO for IPv6 packets */
#define TUN_F_TSO_ECN 0x08 /* I can handle TSO with ECN bits. */ #define TUN_F_TSO_ECN 0x08 /* I can handle TSO with ECN bits. */
#define TUN_F_UFO 0x10 /* I can handle UFO packets */
/* Protocol info prepended to the packets (when IFF_NO_PI is not set) */ /* Protocol info prepended to the packets (when IFF_NO_PI is not set) */
#define TUN_PKT_STRIP 0x0001 #define TUN_PKT_STRIP 0x0001