September 2009 - Libguestfs - libguestfs List Archives

[PATCH] Change handling of spaces on Linux kernel command line
by Richard W.M. Jones 22 Sep '09

22 Sep '09

-- Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones libguestfs lets you edit virtual machines. Supports shell scripting, bindings from many languages. http://et.redhat.com/~rjones/libguestfs/ See what it can do: http://et.redhat.com/~rjones/libguestfs/recipes.html

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[PATCH 00/10] Remove the need for vmchannel
by Richard W.M. Jones 22 Sep '09

22 Sep '09

This set of 10 patches removes the need for any vmchannel implementation, although we can still choose to use vmchannel if we want. In this so-called "null vmchannel" configuration, the appliance connects directly to a port on the library. The exact method is described in patch 9/10. This method still requires SLIRP (user mode networking) so it is not a panacea, because recent versions of qemu allow SLIRP to be removed. We therefore need to continue along the path of exploring alternate vmchannel implementations. [PATCH 01/10] Rearrange qemu command line order (no functional change). [PATCH 02/10] Combine temporary buffers. - General code cleanups. [PATCH 03/10] Remove guestfs_wait_ready (turn it into a no-op). - guestfs_wait_ready is no longer helpful. Since vmchannel and null vmchannel are fundamentally different, we need to remove the split between launch and wait_ready and make launch into a single large function that can handle both cases. [PATCH 04/10] Remove unnecessary extra space from qemu command line. [PATCH 05/10] Make GUESTFWD_PORT into a string. [PATCH 06/10] Rearrange and tidy up code in guestfsd.c - More code cleanups. [PATCH 07/10] Flexible guestfs_vmchannel parameter for future appliances. - Add guestfs_vmchannel=(tcp:<ip>:<port>|...) parameter to the appliance, and make it backwards compatible with older library version. [PATCH 08/10] configure.ac: Check for <netinet/in.h> and <arpa/inet.h> [PATCH 09/10] Implement "null vmchannel" - no vmchannel needed! [PATCH 10/10] Update documentation of qemu / vmchannel. - The implementation of null vmchannel.

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[PATCH] Enable new-style -chardev ... guestfwd command line
by Richard W.M. Jones 18 Sep '09

18 Sep '09

This also changes the name of the "vmchannel" buffer to just "buf", reflecting the fact that it's just used as a temporary buffer, and that the word vmchannel is overloaded. Rich. -- Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones libguestfs lets you edit virtual machines. Supports shell scripting, bindings from many languages. http://et.redhat.com/~rjones/libguestfs/ See what it can do: http://et.redhat.com/~rjones/libguestfs/recipes.html

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[PATCH] Fix code which looked for leaked FDs between each command.
by Richard W.M. Jones 17 Sep '09

17 Sep '09

-- Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones libguestfs lets you edit virtual machines. Supports shell scripting, bindings from many languages. http://et.redhat.com/~rjones/libguestfs/ See what it can do: http://et.redhat.com/~rjones/libguestfs/recipes.html

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[PATCH] Remove explicit guestfs=10.0.2.4:6666 kernel command line parameter.
by Richard W.M. Jones 17 Sep '09

17 Sep '09

This patch is in preparation for allowing libguestfs to use alternate "vmchannel" implementations. Although it's not a functional change, I think it is worthwhile on its own because use of the term "vmchannel" in the names of constants is inappropriate since (a) the "-net channel" option is now properly known upstream as "guestfwd", and (b) no one can agree on what "vmchannel" really means. Rich. -- Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones Read my programming blog: http://rwmj.wordpress.com Fedora now supports 75 OCaml packages (the OPEN alternative to F#) http://cocan.org/getting_started_with_ocaml_on_red_hat_and_fedora

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[PATCH DISCUSSION ONLY] Enable alternate vmchannel method (non-upstream virtio-console).
by Richard W.M. Jones 17 Sep '09

17 Sep '09

This patch is for discussion only. The multiport virtio-console is not accepted upstream, and in any case is currently being rewritten for the nth time. Getting a test environment to test this out is also non-trivial. It look me about a day. You need to compile the alternate qemu (see URL in the patch + attached qemu patch on top of this). You also need to compile the alternate kernel - NOTE: only linux-next kernel given in the URL in the patch will work, earlier kernels will definitely *not* work. You need to create an RPM of this and then build a custom appliance with this kernel. NOTE: Do not use supermin! Then you can test it with a qemu wrapper, like this: LIBGUESTFS_QEMU=~/d/vs-qemu-kvm/qemu.wrapper \ libtool --mode=execute \ ./fish/guestfish -v alloc /tmp/test.img 10M : run : debug ll / (or if you are more adventurous, try running 'make check'). Multiport virtio-console fails on my local machine if the host is under moderate load. I'm currently working on a smaller test case to try to reproduce this more easily. Rich. -- Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into Xen guests. http://et.redhat.com/~rjones/virt-p2v

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[PATCH] Fix verbose packet dumping functions.
by Richard W.M. Jones 17 Sep '09

17 Sep '09

-- Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones New in Fedora 11: Fedora Windows cross-compiler. Compile Windows programs, test, and build Windows installers. Over 70 libraries supprt'd http://fedoraproject.org/wiki/MinGW http://www.annexia.org/fedora_mingw

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[PATCH] Daemon: fix handling of errors from xread.
by Richard W.M. Jones 17 Sep '09

17 Sep '09

This caused me to waste about 3 hours looking for a non-existent "data corrupter" bug, which turned out to be the result of not checking the return value of xread ... Rich. -- Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into Xen guests. http://et.redhat.com/~rjones/virt-p2v

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[PATCH] Disable -Wunsafe-loop-optimizations
by Richard W.M. Jones 17 Sep '09

17 Sep '09

-- Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones virt-top is 'top' for virtual machines. Tiny program with many powerful monitoring features, net stats, disk stats, logging, etc. http://et.redhat.com/~rjones/virt-top

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[PATCH] 'len' should be an unsigned 32 bit int.
by Richard W.M. Jones 17 Sep '09

17 Sep '09

-- Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones libguestfs lets you edit virtual machines. Supports shell scripting, bindings from many languages. http://et.redhat.com/~rjones/libguestfs/ See what it can do: http://et.redhat.com/~rjones/libguestfs/recipes.html

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