On 09/15/2014 09:42 AM, Peter Krempa wrote:
> From: Francesco Romani <fromani@xxxxxxxxxx>
>
> Management software wants to be able to allocate disk space on demand.
> To support this they need keep track of the space occupation of the
> block device. This information is reported by qemu as part of block
> stats.
>
> This patch extend the block information in the bulk stats with the
> allocation information.
>
> To keep the same behaviour a helper is extracted from
> qemuMonitorJSONGetBlockExtent in order to get per-device allocation
> information.
>
> Signed-off-by: Francesco Romani <fromani@xxxxxxxxxx>
> ---
> src/libvirt.c | 2 +
> src/qemu/qemu_driver.c | 18 +++++++++
> src/qemu/qemu_monitor.h | 1 +
> src/qemu/qemu_monitor_json.c | 91 ++++++++++++++++++++++++++++++++++----------
> 4 files changed, 92 insertions(+), 20 deletions(-)
>
> diff --git a/src/libvirt.c b/src/libvirt.c
> index ab10a3a..a8892a2 100644
> --- a/src/libvirt.c
> +++ b/src/libvirt.c
> @@ -21654,6 +21654,8 @@ virConnectGetDomainCapabilities(virConnectPtr conn,
> * unsigned long long.
> * "block.<num>.errors" - Xen only: the 'oo_req' value as
> * unsigned long long.
> + * "block.<num>.allocation" - offset of the highest written sector
> + * as unsigned long long.
If we are repeating virDomainGetBlockInfo() here, I'd rather see us
report all 3 pieces of information (allocation, capacity, physical)
instead of just one.
> +typedef enum {
> + QEMU_MONITOR_BLOCK_EXTENT_ERROR_OK,
> + QEMU_MONITOR_BLOCK_EXTENT_ERROR_NOPARENT,
> + QEMU_MONITOR_BLOCK_EXTENT_ERROR_NOSTATS,
> + QEMU_MONITOR_BLOCK_EXTENT_ERROR_NOOFFSET
> +} qemuMonitorBlockExtentError;
We require C99, so please have a trailing comma in the enum (it makes
adding new elements easier, because they don't have to modify an
existing line).
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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