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2015-06-17tap: add VNET_LE/VNET_BE operationsGreg Kurz1-0/+2
The linux tap and macvtap backends can be told to parse vnet headers according to little or big endian. This is done through the TUNSETVNETLE and TUNSETVNETBE ioctls. This patch brings all the plumbing for QEMU to use these APIs. 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>
2013-02-27tap: set IFF_ONE_QUEUE per defaultPeter Lieven1-4/+5
historically the kernel queues packets two times. once at the device and second in qdisc. this is believed to cause interface stalls if one of these queues overruns. setting IFF_ONE_QUEUE is the default in kernels >= 3.8. the flag is ignored since then. see kernel commit 5d097109257c03a71845729f8db6b5770c4bbedc Signed-off-by: Peter Lieven <pl@kamp.de> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-02-01tap: import linux multiqueue constantsJason Wang1-0/+4
Import multiqueue constants from if_tun.h from 3.8-rc3. A new ifr flag IFF_MULTI_QUEUE were introduced to create a multiqueue backend by calling TUNSETIFF with the this flag and with the same interface name many times. A new ioctl TUNSETQUEUE were introduced. When doing this ioctl with IFF_DETACH_QUEUE, the queue were disabled in the linux kernel. When doing this ioctl with IFF_ATTACH_QUEUE, the queue were enabled in the linux kernel. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-12-19net: reorganize headersPaolo Bonzini1-18/+2
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. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2010-09-07tap: add APIs for vnet header lengthMichael S. Tsirkin1-0/+2
Add APIs to control host header length. First user will be vhost-net. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2010-09-07tap: generalize code for different vnet header lenMichael S. Tsirkin1-0/+6
Make host vnet header length a structure field in preparation for using this support in linux kernel. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2009-10-30Unbreak Linux buildAnthony Liguori1-1/+1
commit 71f4effce79ec0485586963ea764f2c212c72f26 Author: Alexander Graf <agraf@suse.de> Date: Fri Oct 30 22:27:00 2009 +0100 Unbreak tap compilation on OS X Broke the build on Linux due to a bad #if guard Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-10-30Unbreak tap compilation on OS XAlexander Graf1-0/+4
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. I haven't tested if using tap actually works, but I don't think that's a major issue as that code was probably seriously untested before already. I didn't split the patch, because it's only a few lines of code and splitting is probably not worth the effort here. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-10-30net: move tap-linux.h under net/Mark McLoughlin1-0/+51
Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
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