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46a0737e13
Currently the qemuDomainGetBlockInfo will return allocation == physical for most backing stores. For a qcow2 block backed device it's possible to return the highest lv extent allocated from qemu for an active guest. That is a value where allocation != physical and one would hope be less. However, if the guest is not running, then the code falls back to returning allocation == physical. This turns out to be problematic for rhev which monitors the size of the backing store. During a migration, before the VM has been started on the target and while it is deemed inactive on the source, there's a small window of time where the allocation is returned as physical triggering the code to extend the file unnecessarily. Since rhev uses transient domains and this is edge condition for a transient domain, rather than returning good status and allocation == physical when this "window of opportunity" exists, this patch will check for a transient (or non persistent) domain and return a failure to the caller rather than returning the defaults. For a persistent domain, the defaults will be returned. The description for the virDomainGetBlockInfo has been updated to describe the phenomena. |
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| .. | ||
| libvirtd_qemu.aug | ||
| MIGRATION.txt | ||
| qemu_agent.c | ||
| qemu_agent.h | ||
| qemu_bridge_filter.c | ||
| qemu_bridge_filter.h | ||
| qemu_capabilities.c | ||
| qemu_capabilities.h | ||
| qemu_cgroup.c | ||
| qemu_cgroup.h | ||
| qemu_command.c | ||
| qemu_command.h | ||
| qemu_conf.c | ||
| qemu_conf.h | ||
| qemu_domain.c | ||
| qemu_domain.h | ||
| qemu_driver.c | ||
| qemu_driver.h | ||
| qemu_hostdev.c | ||
| qemu_hostdev.h | ||
| qemu_hotplug.c | ||
| qemu_hotplug.h | ||
| qemu_hotplugpriv.h | ||
| qemu_migration.c | ||
| qemu_migration.h | ||
| qemu_monitor_json.c | ||
| qemu_monitor_json.h | ||
| qemu_monitor_text.c | ||
| qemu_monitor_text.h | ||
| qemu_monitor.c | ||
| qemu_monitor.h | ||
| qemu_process.c | ||
| qemu_process.h | ||
| qemu_processpriv.h | ||
| qemu.conf | ||
| test_libvirtd_qemu.aug.in | ||
| THREADS.txt | ||