Markus Groß wrote:
Hi,
I started working on a libxenlight driver for libvirt a few weeks ago. By that time I didn't knew Jim Fehlig was also working on a driver for that api: http://article.gmane.org/gmane.comp.emulators.libvirt/33024
Because I already did some work and there is no driver from Jim yet, I am posting my current version of the driver here.
I was hoping to get an initial submission this week but have been quite ill.
It is a driver for the libxl (libxenlight) interface from the upcoming xen 4.1.
This driver is divided into 3 patches, the first adds the driver without changing anything in libvirt, the second one integrates it into the build system of libvirt. The last one is self explanatory.
However there are a few caveats.
1. The driver offers only basic functionality like: suspend, resume, pinvcpu, etc. create, restore, definexml and others are not yet implemented.
I took the approach of getting define, create, reboot, capabilities, getinfo, and dumpxml implemented.
2. The driver supports libvirtxml <-> xen-xm conversion, thanks to the unified xen driver which already offered this functionality. But since this driver is not part of xen unified, I had to copy this functionality, rather than reusing it.
Yep, same with some of the capabilities code. But I haven't done much in the way of libvirtXML <-> xen-xm conversion since I'm not convinced the libvirt libxenlight driver should even manage vms it has not created (similar to qemu driver). If a vm is started with xl tool, it has a daemon spawned to listen for domain death, CD eject, etc. events. I'm not sure of libvirt libxenlight driver should get involved with that. Hmm, I should just post my current driver so you can take a look. Thanks. Jim
3. To compile libvirt with this driver, there is a new flag --with-xenlight. To fix some linker errors, libvirt has to link against several additional libraries now which are used in xen's libxenlight. These libraries are not directly used within libvirt, but I believe that some of them are GPL licensed, so that could be an issue.
4. To compile the driver you may need to copy the libxl_utils.h from tools/libxl of your xen-source directory to an include dir in your PATH. Right now this file is not copied when installing xen, but I will talk with the xen developers about that.
Please let me know what you think about it.
Thanks, Markus
Markus Groß (3): Add basic libxenlight driver Integrate libxenlight driver into libvirt Add myself to AUTHORS
AUTHORS | 1 + configure.ac | 35 +- include/libvirt/virterror.h | 1 + po/POTFILES.in | 2 + src/Makefile.am | 25 + src/driver.h | 3 +- src/libvirt.c | 13 + src/util/virterror.c | 3 + src/xenlight/xl_driver.c | 948 ++++++++++++++++++ src/xenlight/xl_driver.h | 46 + src/xenlight/xl_driver_private.h | 52 + src/xenlight/xl_utils.c | 1969 ++++++++++++++++++++++++++++++++++++++ src/xenlight/xl_utils.h | 90 ++ tools/virsh.c | 3 + 14 files changed, 3188 insertions(+), 3 deletions(-) create mode 100644 src/xenlight/xl_driver.c create mode 100644 src/xenlight/xl_driver.h create mode 100644 src/xenlight/xl_driver_private.h create mode 100644 src/xenlight/xl_utils.c create mode 100644 src/xenlight/xl_utils.h
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