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Re: [Qemu-devel] [PATCH 5/6] vhost-net: tell tap backend about the vnet
From: |
Thomas Huth |
Subject: |
Re: [Qemu-devel] [PATCH 5/6] vhost-net: tell tap backend about the vnet endianness |
Date: |
Fri, 19 Jun 2015 11:16:35 +0200 |
Hi,
On Wed, 17 Jun 2015 15:23:49 +0200
Greg Kurz <address@hidden> wrote:
> The default behaviour for TAP/MACVTAP is to consider vnet as native endian.
>
> This patch handles the cases when this is not true:
> - virtio 1.0: always little-endian
> - legacy cross-endian
>
> Signed-off-by: Greg Kurz <address@hidden>
> ---
> hw/net/vhost_net.c | 33 ++++++++++++++++++++++++++++++++-
> 1 file changed, 32 insertions(+), 1 deletion(-)
>
> diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
> index 1c55517e3611..8cbb2f618c1c 100644
> --- a/hw/net/vhost_net.c
> +++ b/hw/net/vhost_net.c
...
> @@ -365,6 +394,8 @@ void vhost_net_stop(VirtIODevice *dev, NetClientState
> *ncs,
> fflush(stderr);
> }
> assert(r >= 0);
> +
> + assert(vhost_net_set_vnet_endian(dev, ncs[0].peer, false) >= 0);
> }
Putting the vhost_net_set_vnet_endian() within the assert statement
looks somewhat wrong to me. assert() gets defined to nothing in case
NDEBUG is defined, so the call would then simply be dropped.
I guess you rather want something like this here:
r = vhost_net_set_vnet_endian(dev, ncs[0].peer, false);
assert(r >= 0);
?
Thomas
- [Qemu-devel] [PATCH 0/6] vhost: cross-endian support, Greg Kurz, 2015/06/17
- [Qemu-devel] [PATCH 3/6] vhost: set vring endianness for legacy virtio, Greg Kurz, 2015/06/17
- [Qemu-devel] [PATCH 5/6] vhost-net: tell tap backend about the vnet endianness, Greg Kurz, 2015/06/17
- Re: [Qemu-devel] [PATCH 5/6] vhost-net: tell tap backend about the vnet endianness,
Thomas Huth <=
- [Qemu-devel] [PATCH 4/6] tap: add VNET_LE/VNET_BE operations, Greg Kurz, 2015/06/17
- [Qemu-devel] [PATCH 6/6] vhost_net: re-enable when cross endian, Greg Kurz, 2015/06/17
- [Qemu-devel] [PATCH 1/6] linux-headers: sync vhost.h, Greg Kurz, 2015/06/17
- [Qemu-devel] [PATCH 2/6] virtio: introduce virtio_legacy_is_cross_endian(), Greg Kurz, 2015/06/17
- Re: [Qemu-devel] [PATCH 0/6] vhost: cross-endian support, Michael S. Tsirkin, 2015/06/17