Re: [libvirt] [PATCHv6 08/11] qemu: bulk stats: add block allocation information

From: Francesco Romani <fromani(a)redhat.com&gt; 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(a)redhat.com&gt; --- 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.

+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;