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# Date Author Comment
aa4f082f 09/06/2013 06:01 pm Brad Smith

tap: Use numbered tap/tun devices on all *BSD OS's

The following patch simplifies the *BSD tap/tun code and makes use of numbered
tap/tun interfaces on all *BSD OS's. NetBSD has a patch in their pkgsrc tree
to make use of this feature and DragonFly also supports this as well....
d73fe37e 05/24/2013 05:33 pm Alasdair McLeay

net: support for bridged networking on Mac OS X

tun tap can be implemented on Mac OS X using
http://tuntaposx.sourceforge.net

It behaves in the same way as FreeBSD/OpenBSD implementations, but Qemu
needs a patch to use the OpenBS/FreeBSD code.

As per the patch listed in this forum thread:...
e5dc0b40 02/01/2013 07:03 pm Jason Wang

tap: introduce a helper to get the name of an interface

This patch introduces a helper tap_get_ifname() to get the device name of tap
device. This is needed when ifname is unspecified in the command line and qemu
were asked to create tap device by itself. In this situation, the name were...
264986e2 02/01/2013 07:03 pm Jason Wang

tap: multiqueue support

Recently, linux support multiqueue tap which could let userspace call TUNSETIFF
for a signle device many times to create multiple file descriptors as
independent queues. User could also enable/disabe a specific queue through
TUNSETQUEUE....
94fdc6d0 02/01/2013 07:03 pm Jason Wang

tap: add Linux multiqueue support

This patch add basic multiqueue support for Linux. When multiqueue is needed, we
will first check whether kernel support multiqueue tap before creating more
queues. Two new functions tap_fd_enable() and tap_fd_disable() were introduced...
9c17d615 12/19/2012 09:32 am Paolo Bonzini

softmmu: move include files to include/sysemu/

Signed-off-by: Paolo Bonzini <>
1de7afc9 12/19/2012 09:32 am Paolo Bonzini

misc: move include files to include/qemu/

Signed-off-by: Paolo Bonzini <>
1422e32d 12/19/2012 09:31 am Paolo Bonzini

net: reorganize headers

Move public headers to include/net, and leave private headers in net/.
Put the virtio headers in include/net/tap.h, removing the multiple copies
that existed. Leave include/net/tap.h as the interface for NICs, and
net/tap_int.h as the interface for OS-specific parts of the tap backend....
08c573a8 07/23/2012 01:55 pm Laszlo Ersek

convert net_init_tap() to NetClientOptions

Signed-off-by: Laszlo Ersek <>
Signed-off-by: Stefan Hajnoczi <>
3294ce18 06/09/2012 01:30 pm Michael Tokarev

do not include <libutil.h> needlessly or if it doesn't exist

<libutil.h> and <util.h> on *BSD (some have one, some another)
were #included just for openpty() declaration. The only file
where this function is actually used is qemu-char.c.

In vl.c and net/tap-bsd.c, none of functions declared in libutil.h...
45c245bf 08/07/2011 12:48 pm Manuel Bouyer

Fix network interface tap backend

Fix network interface tap backend work on NetBSD.
It uses an ioctl to get the tap name.

Signed-off-by: Christoph Egger<>
Signed-off-by: Blue Swirl <>
5f668643 12/21/2010 09:44 pm Brad

Add support for OpenBSD to QEMU's tap driver.

Signed-off-by: Brad Smith <>
Signed-off-by: Blue Swirl <>
5251d6ad 09/29/2010 07:15 pm Andreas Färber

tap: Remove double include of util.h

If neither of FreeBSD, FreeBSD_kernel and DragonFly is defined,
util.h is included from tap-bsd.c.
Don't include it again if OpenBSD is defined.

Cc: Blue Swirl <>
Signed-off-by: Andreas Färber <>...
445d892f 09/07/2010 08:27 pm Michael S. Tsirkin

tap: add APIs for vnet header length

Add APIs to control host header length. First user
will be vhost-net.

Signed-off-by: Michael S. Tsirkin <>
73d96e29 03/27/2010 08:41 pm Blue Swirl

Fix BSD and win32 builds

CC    net/tap-bsd.o
/src/qemu/net/tap-bsd.c: In function `tap_open':
/src/qemu/net/tap-bsd.c:93: warning: implicit declaration of function `error_report'
CC    sparc-softmmu/../net/tap-win32.o
cc1: warnings being treated as errors...
1ecda02b 03/16/2010 05:58 pm Markus Armbruster

error: Replace qemu_error() by error_report()

error_report() terminates the message with a newline. Strip it it
from its arguments.

This fixes a few error messages lacking a newline:
net_handle_fd_param()'s "No file descriptor named %s found", and
tap_open()'s "vnet_hdr=1 requested, but no kernel support for...
a167ba50 11/29/2009 07:00 pm Aurelien Jarno

Add support for GNU/kFreeBSD

Signed-off-by: Aurelien Jarno <>
2f859a3c 11/21/2009 11:32 am Juergen Lock

tap-bsd: handle ifname on FreeBSD hosts

Handle ifname on FreeBSD hosts; if no ifname is given, always start
the search from tap0. (Simplified/cleaned up version of what has been
in the FreeBSD ports for a long time.)

Signed-off-by: Juergen Lock <>...
39ca4c08 11/21/2009 11:32 am Juergen Lock

Fix tap breakage on BSD hosts (no IFF_VNET_HDR)

net/tap-bsd.c was assuming IFF_VNET_HDR was always available, which
I think isn't true on any BSD.

Signed-off-by: Juergen Lock <>
Signed-off-by: Blue Swirl <>
71f4effc 10/30/2009 11:38 pm Alexander Graf

Unbreak tap compilation on OS X

Currently compiling the tap sources breaks on Mac OS X. This is because of:

1) tap-linux.h requiring Linux includes
  2) typos
  3) missing #includes

This patch adds what's necessary to compile tap happily on Mac OS X....
9c282718 10/30/2009 03:39 pm Mark McLoughlin

net: move UFO support detection to tap-linux.c

Only supported on Linux

Signed-off-by: Mark McLoughlin <>
Signed-off-by: Anthony Liguori <>
15ac913b 10/30/2009 03:39 pm Mark McLoughlin

net: move tap_set_sndbuf() to tap-linux.c

TUNSETSNDBUF is only available on linux

Signed-off-by: Mark McLoughlin <>
Signed-off-by: Anthony Liguori <>
dc69004c 10/30/2009 03:39 pm Mark McLoughlin

net: move tap_probe_vnet_hdr() to tap-linux.c

Only Linux has support for IFF_VNET_HDR

Signed-off-by: Mark McLoughlin <>
Signed-off-by: Anthony Liguori <>
1faac1f7 10/30/2009 03:39 pm Mark McLoughlin

net: move tap_set_offload() code into tap-linux.c

TUNSETOFFLOAD is only available on Linux

Signed-off-by: Mark McLoughlin <>
Signed-off-by: Anthony Liguori <>
e7e92325 10/30/2009 03:39 pm Mark McLoughlin

net: split BSD tap_open() out into net/tap-bsd.c

Signed-off-by: Mark McLoughlin <>
Signed-off-by: Anthony Liguori <>