net: Adding netmap network backend

This patch adds support for a network backend based on netmap.
netmap is a framework for high speed packet I/O. You can use it
to build extremely fast traffic generators, monitors, software
switches or network middleboxes. Its companion software switch
VALE lets you interconnect virtual machines.
netmap and VALE are implemented as a non-intrusive kernel module,
support NICs from multiple vendors, are part of standard FreeBSD
distributions and available in source format for Linux too.

To compile QEMU with netmap support, use the following configure
options:
    ./configure [...] --enable-netmap --extra-cflags=-I/path/to/netmap/sys
where "/path/to/netmap" contains the netmap source code, available at
    http://info.iet.unipi.it/~luigi/netmap/

The same webpage contains more information about the netmap project
(together with papers and presentations).

Signed-off-by: Vincenzo Maffione <v.maffione@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/net/clients.h b/net/clients.h
index 77932942bd..7322ff5f33 100644
--- a/net/clients.h
+++ b/net/clients.h
@@ -52,4 +52,9 @@ int net_init_vde(const NetClientOptions *opts, const char *name,
                  NetClientState *peer);
 #endif
 
+#ifdef CONFIG_NETMAP
+int net_init_netmap(const NetClientOptions *opts, const char *name,
+                    NetClientState *peer);
+#endif
+
 #endif /* QEMU_NET_CLIENTS_H */