[libvirt] [PATCH 2/4] qemu: snapshot: Forbid partial internal snapshots

qemu's savevm command does a snapshot of all non readonly disks of a VM. Libvirt though allowed disabling snapshot for certain disk of a VM. --- src/qemu/qemu_driver.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index aa07ef6..e6b6648 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -12621,6 +12621,7 @@ qemuDomainSnapshotPrepare(virConnectPtr conn, bool reuse = (*flags & VIR_DOMAIN_SNAPSHOT_CREATE_REUSE_EXT) != 0; bool atomic = (*flags & VIR_DOMAIN_SNAPSHOT_CREATE_ATOMIC) != 0; bool found_internal = false; + bool forbid_internal = false; int external = 0; qemuDomainObjPrivatePtr priv = vm->privateData; @@ -12689,6 +12690,9 @@ qemuDomainSnapshotPrepare(virConnectPtr conn, break; case VIR_DOMAIN_SNAPSHOT_LOCATION_NONE: + /* Remember seeing a disk that has snapshot disabled */ + if (!dom_disk->readonly) + forbid_internal = true; break; case VIR_DOMAIN_SNAPSHOT_LOCATION_DEFAULT: @@ -12699,12 +12703,13 @@ qemuDomainSnapshotPrepare(virConnectPtr conn, } } - /* internal snapshot requires a disk image to store the memory image to */ - if (def->memory == VIR_DOMAIN_SNAPSHOT_LOCATION_INTERNAL && - !found_internal) { + /* internal snapshot requires a disk image to store the memory image to and + * also disks can't be excluded from a internal snapshot*/ + if ((def->memory == VIR_DOMAIN_SNAPSHOT_LOCATION_INTERNAL && !found_internal) || + (found_internal && forbid_internal)) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", - _("internal checkpoints require at least " - "one disk to be selected for snapshot")); + _("internal snapshots and checkpoints require all " + "disks to be selected for snapshot")); goto cleanup; } -- 1.9.3