[PATCH 0/2] Fix minimum frame size checks in vhost-user paths

[Laurent Vivier <lvivier@redhat.com>]

In the vhost-user code paths, buffers from the virtio queue include
a virtio net header prepended to the Ethernet frame.  The minimum
frame size checks (ETH_ZLEN, i.e. 60 bytes per IEEE 802.3) must
account for this extra header, otherwise the size requested from
vu_collect() and validated in ASSERT() is too small.

This two-patch series:

1. Introduce a VNET_HLEN macro in virtio.h to replace all open-coded
   sizeof(struct virtio_net_hdr_mrg_rxbuf) throughout the vhost-user
   code, improving readability and consistency.

2. Fix the minimum frame size calculations in tcp_vu.c and udp_vu.c
   to use ETH_ZLEN + VNET_HLEN instead of bare ETH_ZLEN, correctly
   accounting for the virtio net header in the buffer size.

Laurent Vivier (2):
  virtio: Introduce VNET_HLEN macro for virtio net header length
  tcp_vu, udp_vu: Account for virtio net header in minimum frame size

 tcp_vu.c    | 29 +++++++++++------------------
 udp_vu.c    | 14 +++++---------
 virtio.h    |  2 ++
 vu_common.c | 13 +++++--------
 vu_common.h |  2 +-
 5 files changed, 24 insertions(+), 36 deletions(-)

-- 
2.52.0