v11: 1. rename virtio_net_set_hdrlen() to __virtio_net_set_hdrlen(), virtio_net_set_tnl_hdrlen() to __virtio_net_set_tnl_hdrlen(), and add explicitly mention in a comment that such functions must be invoked only after virtio_net_hdr_from_skb()
v10: 1. fix http://lore.kernel.org/all/[email protected] v9: 1. Introduce new helpers to set hdr len, and virtio_net_hdr_tnl_from_skb calls them directly. v8: 1. move changes of virtio_net_hdr_from_skb for udp tunnel to #2 2. remove change for num_sg v7: 1. fix bug reported by robot 2. Still splitting into two commits, as the issues fixed originate from different commits. This separation makes it easier to selectively revert to previous versions. v6: 1. rename to guest_hdrlen 2. introduce a function virtio_net_set_hdrlen to set the hdrlen The commit be50da3e9d4a ("net: virtio_net: implement exact header length guest feature") introduces support for the VIRTIO_NET_F_GUEST_HDRLEN feature in virtio-net. This feature requires virtio-net to set hdr_len to the actual header length of the packet when transmitting, the number of bytes from the start of the packet to the beginning of the transport-layer payload. However, in practice, hdr_len was being set using skb_headlen(skb), which is clearly incorrect. This path set fixes that issue. As discussed in [0], this version checks the VIRTIO_NET_F_GUEST_HDRLEN is negotiated. [0]: http://lore.kernel.org/all/[email protected] Xuan Zhuo (2): virtio-net: correct hdr_len handling for VIRTIO_NET_F_GUEST_HDRLEN virtio-net: correct hdr_len handling for tunnel gso drivers/net/tun_vnet.h | 2 +- drivers/net/virtio_net.c | 6 ++++- include/linux/virtio_net.h | 53 +++++++++++++++++++++++++++++++++++--- 3 files changed, 55 insertions(+), 6 deletions(-) -- 2.32.0.3.g01195cf9f
