Re: [Qemu-devel] [PATCH v2] net: Disable netmap backend when not supported

[Stefan Hajnoczi <stefanha@redhat.com>]

On Thu, Feb 20, 2014 at 03:40:43PM +0100, Vincenzo Maffione wrote:
> This patch fixes configure so that the netmap backend is not compiled in if the
> host doesn't support an API version >= 11. A version upper bound (15) has been
> added so that the netmap API can be extended with some minor features without
> requiring QEMU code modifications.
> 
> Moreover, some changes have been done to net/netmap.c in order to reflect the
> current netmap API/ABI (11).
> 
> The NETMAP_WITH_LIBS macro makes possible to include some utilities (e.g.
> netmap ring macros, D(), RD() and other high level functions) through the netmap
> headers. In this way we get rid of the D and RD macro definitions in the QEMU
> code, and we open the way for further code simplifications that will be
> introduced by future patches.
> 
> Signed-off-by: Vincenzo Maffione <v.maffione@gmail.com>
> ---
> Note: This patch is against the net-next/net Stefan's branch.
> 
> Changes against the previous version:
>    (1) more complete commit description
>    (2) add comment in ./configure to explain version checks
> 
>  configure    | 10 +++++++++-
>  net/netmap.c | 55 +++++++++++++------------------------------------------
>  2 files changed, 22 insertions(+), 43 deletions(-)

Thanks for adding the explanations, it will make it easier for people
reading the code to understand this change in the future.

Applied to my net tree:
https://github.com/stefanha/qemu/commits/net

Stefan