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| author | Cédric Le Goater | 2014-06-24 19:11:32 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin | 2014-06-29 18:39:41 +0200 |
| commit | 032a74a1c0fcdd5fd1c69e56126b4c857ee36611 (patch) | |
| tree | 0a07110ca6192858747c5cf6adc8affab982be65 /hw/char | |
| parent | vhost-user: typo fixups (diff) | |
| download | qemu-032a74a1c0fcdd5fd1c69e56126b4c857ee36611.tar.gz qemu-032a74a1c0fcdd5fd1c69e56126b4c857ee36611.tar.xz qemu-032a74a1c0fcdd5fd1c69e56126b4c857ee36611.zip | |
virtio-net: byteswap virtio-net header
TCP connectivity fails when the guest has a different endianness.
The packets are silently dropped on the host by the tap backend
when they are read from user space because the endianness of the
virtio-net header is in the wrong order. These lines may appear
in the guest console:
[ 454.709327] skbuff: bad partial csum: csum=8704/4096 len=74
[ 455.702554] skbuff: bad partial csum: csum=8704/4096 len=74
The issue that got first spotted with a ppc64le PowerKVM guest,
but it also exists for the less common case of a x86_64 guest run
by a big-endian ppc64 TCG hypervisor.
Signed-off-by: Cédric Le Goater <clg@fr.ibm.com>
[ Ported from PowerKVM,
Greg Kurz <gkurz@linux.vnet.ibm.com> ]
Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/char')
0 files changed, 0 insertions, 0 deletions