Cyrille Chépélov
2009-Nov-06 17:19 UTC
[Pkg-xen-devel] Bug#554805: patch to enable routed networking in HVM+ioemu
tag 554805 + patch thanks The problem to solve is that qemu-ifup assumes the world is always bridged, and vif-routed does not know of the concept of TAP devices, and even if it did, it has at this point no way to get at qemu's TAP device anyway. The following set of patches help run in the ioemu-HVM situation: * xend-image.py.diff : modifies the HVM loader so that when running in ioemu-HVM mode, Xend invokes qemu-dm with a phony bridge name, intended for qemu-ifup * qemu-ifup (just the whole script): this version checks for the special bridge name. If it is present, the prefix is truncated and the contents are assumed to be the VIF device name. Since I don't see a much better way for now to provide vif-routing with the TAP device name, a small "mailbox" file is created. WARNING: as is, this creates OR uses a directory within /tmp. This might cause a local privilege escalation. Don't let random users roam on your dom0 -- if this proof of concept is used for production purpose, a real place somewhere safe within /var/run should be used instead. * vif-route.patch: this script now looks for two conditions: 1) the type of the vif is ioemu 2) the mailbox file (left by qemu-ifup) is present (in which case it's assumed to contain a VIF interface name) if both conditions are present, then from that point on vif-route ignores the vifN.0 interface and sets up tapM instead. Net result: on this system, ioemu-HVM guests now have working networking (another guest, which uses netfront-HVM [a SLES 11 VM], also works, but taking advantage of the faster VIF scheme) Thanks in advance, -- Cyrille -------------- next part -------------- A non-text attachment was scrubbed... Name: xend-image.py.diff Type: text/x-patch Size: 1022 bytes Desc: not available URL: <http://lists.alioth.debian.org/pipermail/pkg-xen-devel/attachments/20091106/360d83d6/attachment.bin> -------------- next part -------------- A non-text attachment was scrubbed... Name: qemu-ifup Type: application/x-shellscript Size: 426 bytes Desc: not available URL: <http://lists.alioth.debian.org/pipermail/pkg-xen-devel/attachments/20091106/360d83d6/attachment-0001.bin> -------------- next part -------------- A non-text attachment was scrubbed... Name: vif-route.patch Type: text/x-patch Size: 1672 bytes Desc: not available URL: <http://lists.alioth.debian.org/pipermail/pkg-xen-devel/attachments/20091106/360d83d6/attachment-0002.bin>
Debian Bug Tracking System
2009-Nov-06 17:33 UTC
[Pkg-xen-devel] Processed: patch to enable routed networking in HVM+ioemu
Processing commands for control at bugs.debian.org:> tag 554805 + patchBug #554805 [xen-utils-3.2-1] xen-utils-3.2-1: ioemu routed networking on HVM guests fails Added tag(s) patch.> thanksStopping processing here. Please contact me if you need assistance. Debian bug tracking system administrator (administrator, Debian Bugs database)
Reasonably Related Threads
- Bug#554805: xen-utils-3.2-1: ioemu routed networking on HVM guests fails
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- Routed Xen HVM on Centos 5.5 64bit
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