| Age | Commit message (Collapse) | Author | Files | Lines | |
|---|---|---|---|---|---|
| 2012-02-01 | Add support for net bridge | Corey Bryant | 1 | -0/+3 | |
| The most common use of -net tap is to connect a tap device to a bridge. This requires the use of a script and running qemu as root in order to allocate a tap device to pass to the script. This model is great for portability and flexibility but it's incredibly difficult to eliminate the need to run qemu as root. The only really viable mechanism is to use tunctl to create a tap device, attach it to a bridge as root, and then hand that tap device to qemu. The problem with this mechanism is that it requires administrator intervention whenever a user wants to create a guest. By essentially writing a helper that implements the most common qemu-ifup script that can be safely given cap_net_admin, we can dramatically simplify things for non-privileged users. We still support existing -net tap options as a mechanism for advanced users and backwards compatibility. Currently, this is very Linux centric but there's really no reason why it couldn't be extended for other Unixes. A typical invocation would be similar to one of the following: qemu linux.img -net bridge -net nic,model=virtio qemu linux.img -net tap,helper="/usr/local/libexec/qemu-bridge-helper" -net nic,model=virtio qemu linux.img -netdev bridge,id=hn0 -device virtio-net-pci,netdev=hn0,id=nic1 qemu linux.img -netdev tap,helper="/usr/local/libexec/qemu-bridge-helper",id=hn0 -device virtio-net-pci,netdev=hn0,id=nic1 The default bridge that we attach to is br0. The thinking is that a distro could preconfigure such an interface to allow out-of-the-box bridged networking. Alternatively, if a user wants to use a different bridge, a typical invocation would be simliar to one of the following: qemu linux.img -net bridge,br=qemubr0 -net nic,model=virtio qemu linux.img -net tap,helper="/usr/local/libexec/qemu-bridge-helper --br=qemubr0" -net nic,model=virtio qemu linux.img -netdev bridge,br=qemubr0,id=hn0 -device virtio-net-pci,netdev=hn0,id=nic1 qemu linux.img -netdev tap,helper="/usr/local/libexec/qemu-bridge-helper --br=qemubr0",id=hn0 -device virtio-net-pci,netdev=hn0,id=nic1 Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Richa Marwaha <rmarwah@linux.vnet.ibm.com> Signed-off-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> | |||||
| 2010-09-07 | tap: add APIs for vnet header length | Michael S. Tsirkin | 1 | -0/+4 | |
| Add APIs to control host header length. First user will be vhost-net. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> | |||||
| 2010-04-01 | tap: add API to retrieve vhost net header | Michael S. Tsirkin | 1 | -0/+3 | |
| will be used by virtio-net for vhost net support Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> | |||||
| 2010-04-01 | tap: add interface to get device fd | Michael S. Tsirkin | 1 | -0/+2 | |
| Will be used by vhost to attach/detach to backend. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> | |||||
| 2009-10-30 | net: move UFO support detection to tap-linux.c | Mark McLoughlin | 1 | -0/+1 | |
| Only supported on Linux Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> | |||||
| 2009-10-30 | net: move tap_set_offload() code into tap-linux.c | Mark McLoughlin | 1 | -0/+1 | |
| TUNSETOFFLOAD is only available on Linux Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> | |||||
| 2009-10-30 | net: move tap_probe_vnet_hdr() to tap-linux.c | Mark McLoughlin | 1 | -0/+1 | |
| Only Linux has support for IFF_VNET_HDR Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> | |||||
| 2009-10-30 | net: move tap_set_sndbuf() to tap-linux.c | Mark McLoughlin | 1 | -0/+2 | |
| TUNSETSNDBUF is only available on linux Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> | |||||
| 2009-10-30 | net: move solaris code to net/tap-solaris.c | Mark McLoughlin | 1 | -0/+2 | |
| Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> | |||||
| 2009-10-30 | net: split BSD tap_open() out into net/tap-bsd.c | Mark McLoughlin | 1 | -0/+2 | |
| Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> | |||||
| 2009-10-30 | net: move more stuff into net/tap-win32.c, add net/tap.h | Mark McLoughlin | 1 | -0/+42 | |
| Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> | |||||
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