Willem de Bruijn fd3a886258 net: in virtio_net_hdr only add VLAN_HLEN to csum_start if payload holds vlan ... Tun, tap, virtio, packet and uml vector all use struct virtio_net_hdr to communicate packet metadata to userspace. For skbuffs with vlan, the first two return the packet as it may have existed on the wire, inserting the VLAN tag in the user buffer. Then virtio_net_hdr.csum_start needs to be adjusted by VLAN_HLEN bytes. Commit f09e2249c4 ("macvtap: restore vlan header on user read") added this feature to macvtap. Commit 3ce9b20f19 ("macvtap: Fix csum_start when VLAN tags are present") then fixed up csum_start. Virtio, packet and uml do not insert the vlan header in the user buffer. When introducing virtio_net_hdr_from_skb to deduplicate filling in the virtio_net_hdr, the variant from macvtap which adds VLAN_HLEN was applied uniformly, breaking csum offset for packets with vlan on virtio and packet. Make insertion of VLAN_HLEN optional. Convert the callers to pass it when needed. Fixes: e858fae2b0 ("virtio_net: use common code for virtio_net_hdr and skb GSO conversion") Fixes: 1276f24eee ("packet: use common code for virtio_net_hdr and skb GSO conversion") Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2018-06-07 16:15:38 -04:00
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af_packet.c	net: in virtio_net_hdr only add VLAN_HLEN to csum_start if payload holds vlan	2018-06-07 16:15:38 -04:00
diag.c	packet: pdiag_put_ring() should return TX_RING info for TPACKET_V3	2017-01-10 21:02:42 -05:00
internal.h	packet: fix bitfield update race	2018-04-24 13:17:08 -04:00
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