Willem de Bruijn 1d036d25e5 packet: tpacket_snd gso and checksum offload ...

Support socket option PACKET_VNET_HDR together with PACKET_TX_RING.

When enabled, a struct virtio_net_hdr is expected to precede the data
in the ring. The vnet option must be set before the ring is created.

The implementation reuses the existing skb_copy_bits code that is used
when dev->hard_header_len is non-zero. Move this ll_header check to
before the skb alloc and combine it with a test for vnet_hdr->hdr_len.
Allocate and copy the max of the two.

Verified with test program at
github.com/wdebruij/kerneltools/blob/master/tests/psock_txring_vnet.c

Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2016-02-09 06:43:50 -05:00

..

af_packet.c

packet: tpacket_snd gso and checksum offload

2016-02-09 06:43:50 -05:00

diag.c

netlink: make nlmsg_end() and genlmsg_end() void

2015-01-18 01:03:45 -05:00

internal.h

packet: add classic BPF fanout mode

2015-08-17 14:22:47 -07:00

Kconfig

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Makefile

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