From: Willem de Bruijn <will...@google.com>
Extend PACKET_VNET_HDR socket option support to packet sockets with
memory mapped rings.
Patches 2 and 4 add support to tpacket_rcv and tpacket_snd.
Patch 1 prepares for this by moving the relevant virtio_net_hdr
logic out of packet_snd and packet_rcv into helper functions.
GSO transmission requires all headers in the skb linear section.
Patch 3 moves parsing of tx_ring slot headers before skb allocation
to enable allocation with sufficient linear size.
Changes
v1->v2:
- fix bounds checks:
- subtract sizeof(vnet_hdr) before comparing tp_len to size_max
- compare tp_len to size_max also with GSO, just do not truncate to MTU
Willem de Bruijn (4):
packet: move vnet_hdr code to helper functions
packet: vnet_hdr support for tpacket_rcv
packet: parse tpacket header before skb alloc
packet: tpacket_snd gso and checksum offload
net/packet/af_packet.c | 440 +++++++++++++++++++++++++++++--------------------
1 file changed, 263 insertions(+), 177 deletions(-)
--
2.7.0.rc3.207.g0ac5344
