[libvirt] [PATCH 0/4] Expose FSFreeze/FSThaw within the guest as commands

[Tomoki Sekiyama]

Any comments?


On 11/18/13 11:38 , "Tomoki Sekiyama" <tomoki.sekiyama at hds.com> wrote:

>Currently FSFreeze and FSThaw are supported by qemu guest agent and they
>are
>used internally in snapshot-create command with --quiesce option.
>However, when users want to utilize the native snapshot feature of storage
>devices (such as LVM over iSCSI, various enterprise storage systems,
>etc.),
>they need to issue fsfreeze command separately from libvirt-driven
>snapshots.
>(OpenStack cinder provides these storages' snapshot feature, but it cannot
> quiesce the guest filesystems automatically for now.)
>
>Although virDomainQemuGuestAgent() API could be used for this purpose, it
>depends too much on specific hypervisor implementation.
>
>This patchset adds virDomainFSFreeze()/virDomainFSThaw() APIs and virsh
>domfsfreeze/domfsthaw commands to enable the users to freeze and thaw
>domain's filesystems cleanly.
>
>The APIs has mountPoint and flags option currently unsupported for future
>extension, as virDomainFSTrim() API.
>Duplicated FSFreeze results in error caused by qemu guest agent.
>
>---
>
>Tomoki Sekiyama (4):
>      Introduce virDomainFSFreeze() public API
>      remote: Implement virDomainFSFreeze and virDomainFSThaw
>      qemu: Implement virDomainFSFreeze
>      virsh: Expose new virDomainFSFreeze and virDomainFSThaw API
>
>
> include/libvirt/libvirt.h.in |    8 ++
> src/access/viraccessperm.c   |    2 -
> src/access/viraccessperm.h   |    6 ++
> src/driver.h                 |   12 ++++
> src/libvirt.c                |   92 +++++++++++++++++++++++++++
> src/libvirt_public.syms      |    6 ++
> src/qemu/qemu_driver.c       |  142
>++++++++++++++++++++++++++++++++++++++++++
> src/remote/remote_driver.c   |    2 +
> src/remote/remote_protocol.x |   26 +++++++-
> src/remote_protocol-structs  |   12 ++++
> src/rpc/gendispatch.pl       |    2 +
> tools/virsh-domain.c         |  108 ++++++++++++++++++++++++++++++++
> tools/virsh.pod              |   17 +++++
> 13 files changed, 433 insertions(+), 2 deletions(-)
>