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qemu: Defer support checks for external active snapshots to blockdev code or qemu

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Remove libvirt's support check for the target of an external snapshot to
the blockdev code or qemu. This will potentially require a more complex
cleanup but removes a level of hardcoded feature checks.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Peter Krempa 2019-08-13 13:37:17 +02:00
parent a3f8abb003
commit a6aad9f29f
1 changed files with 12 additions and 4 deletions
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16
src/qemu/qemu_driver.c
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@ -14917,7 +14917,8 @@ qemuDomainSnapshotPrepareDiskExternalInactive(virDomainSnapshotDiskDefPtr snapdi
static int
qemuDomainSnapshotPrepareDiskExternalActive(virDomainSnapshotDiskDefPtr snapdisk,
virDomainDiskDefPtr domdisk)
virDomainDiskDefPtr domdisk,
bool blockdev)
{
int actualType = virStorageSourceGetActualType(snapdisk->src);
@ -14934,6 +14935,10 @@ qemuDomainSnapshotPrepareDiskExternalActive(virDomainSnapshotDiskDefPtr snapdisk
break;
case VIR_STORAGE_TYPE_NETWORK:
/* defer all of the checking to either qemu or libvirt's blockdev code */
if (blockdev)
break;
switch ((virStorageNetProtocol) snapdisk->src->protocol) {
case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
break;
@ -14981,7 +14986,8 @@ static int
qemuDomainSnapshotPrepareDiskExternal(virDomainDiskDefPtr disk,
virDomainSnapshotDiskDefPtr snapdisk,
bool active,
bool reuse)
bool reuse,
bool blockdev)
{
struct stat st;
int err;
@ -15004,7 +15010,7 @@ qemuDomainSnapshotPrepareDiskExternal(virDomainDiskDefPtr disk,
if (qemuDomainSnapshotPrepareDiskExternalInactive(snapdisk, disk) < 0)
return -1;
} else {
if (qemuDomainSnapshotPrepareDiskExternalActive(snapdisk, disk) < 0)
if (qemuDomainSnapshotPrepareDiskExternalActive(snapdisk, disk, blockdev) < 0)
return -1;
}
@ -15105,6 +15111,8 @@ qemuDomainSnapshotPrepare(virDomainObjPtr vm,
virDomainSnapshotDefPtr def,
unsigned int *flags)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
bool blockdev = virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BLOCKDEV);
int ret = -1;
size_t i;
bool active = virDomainObjIsActive(vm);
@ -15163,7 +15171,7 @@ qemuDomainSnapshotPrepare(virDomainObjPtr vm,
}
if (qemuDomainSnapshotPrepareDiskExternal(dom_disk, disk,
active, reuse) < 0)
active, reuse, blockdev) < 0)
goto cleanup;
external++;