11 a.m.
Initialize data for the whole backing chain when plugging in or removing
disks when a machine supports -blockdev.
Similarly to startup we need to prepare the structures for the whole
backing chain and take care of the copy-on-read feature.
Signed-off-by: Peter Krempa <pkrempa(a)redhat.com>
---
src/qemu/qemu_hotplug.c | 77 +++++++++++++++++++++++++++++++++++++++----------
1 file changed, 62 insertions(+), 15 deletions(-)
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index 32d0c3862e..6fde7308f7 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -380,6 +380,10 @@ qemuHotplugRemoveManagedPR(virQEMUDriverPtr driver,
struct _qemuHotplugDiskSourceData {
qemuBlockStorageSourceAttachDataPtr *backends;
size_t nbackends;
+
+ /* disk copy-on-read object */
+ virJSONValuePtr corProps;
+ char *corAlias;
};
typedef struct _qemuHotplugDiskSourceData qemuHotplugDiskSourceData;
typedef qemuHotplugDiskSourceData *qemuHotplugDiskSourceDataPtr;
@@ -393,6 +397,9 @@ qemuHotplugDiskSourceDataFree(qemuHotplugDiskSourceDataPtr data)
if (!data)
return;
+ virJSONValueFree(data->corProps);
+ VIR_FREE(data->corAlias);
+
for (i = 0; i < data->nbackends; i++)
qemuBlockStorageSourceAttachDataFree(data->backends[i]);
@@ -461,25 +468,40 @@ qemuHotplugRemoveStorageSourcePrepareData(virStorageSourcePtr src,
static qemuHotplugDiskSourceDataPtr
qemuHotplugDiskSourceRemovePrepare(virDomainDiskDefPtr disk,
- virQEMUCapsPtr qemuCaps ATTRIBUTE_UNUSED)
+ virQEMUCapsPtr qemuCaps)
{
+ qemuDomainDiskPrivatePtr diskPriv = QEMU_DOMAIN_DISK_PRIVATE(disk);
qemuBlockStorageSourceAttachDataPtr backend = NULL;
qemuHotplugDiskSourceDataPtr data = NULL;
qemuHotplugDiskSourceDataPtr ret = NULL;
char *drivealias = NULL;
+ virStorageSourcePtr n;
if (VIR_ALLOC(data) < 0)
return NULL;
- if (!(drivealias = qemuAliasDiskDriveFromDisk(disk)))
- goto cleanup;
+ if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_BLOCKDEV)) {
+ if (VIR_STRDUP(data->corAlias, diskPriv->nodeCopyOnRead) < 0)
+ goto cleanup;
- if (!(backend = qemuHotplugRemoveStorageSourcePrepareData(disk->src,
- drivealias)))
- goto cleanup;
+ for (n = disk->src; virStorageSourceIsBacking(n); n = n->backingStore) {
+ if (!(backend = qemuHotplugRemoveStorageSourcePrepareData(n, NULL)))
+ goto cleanup;
- if (VIR_APPEND_ELEMENT(data->backends, data->nbackends, backend) < 0)
- goto cleanup;
+ if (VIR_APPEND_ELEMENT(data->backends, data->nbackends, backend) <
0)
+ goto cleanup;
+ }
+ } else {
+ if (!(drivealias = qemuAliasDiskDriveFromDisk(disk)))
+ goto cleanup;
+
+ if (!(backend = qemuHotplugRemoveStorageSourcePrepareData(disk->src,
+ drivealias)))
+ goto cleanup;
+
+ if (VIR_APPEND_ELEMENT(data->backends, data->nbackends, backend) < 0)
+ goto cleanup;
+ }
VIR_STEAL_PTR(ret, data);
@@ -502,21 +524,39 @@ static qemuHotplugDiskSourceDataPtr
qemuHotplugDiskSourceAttachPrepare(virDomainDiskDefPtr disk,
virQEMUCapsPtr qemuCaps)
{
- qemuBlockStorageSourceAttachDataPtr backend;
+ qemuBlockStorageSourceAttachDataPtr backend = NULL;
qemuHotplugDiskSourceDataPtr data;
qemuHotplugDiskSourceDataPtr ret = NULL;
+ virStorageSourcePtr n;
if (VIR_ALLOC(data) < 0)
return NULL;
- if (!(backend = qemuBuildStorageSourceAttachPrepareDrive(disk, qemuCaps)))
- goto cleanup;
+ if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_BLOCKDEV)) {
+ if (disk->copy_on_read == VIR_TRISTATE_SWITCH_ON &&
+ !(data->corProps = qemuBlockStorageGetCopyOnReadProps(disk)))
+ goto cleanup;
- if (qemuBuildStorageSourceAttachPrepareCommon(disk->src, backend, qemuCaps) <
0)
- goto cleanup;
+ for (n = disk->src; virStorageSourceIsBacking(n); n = n->backingStore) {
+ if (!(backend = qemuBlockStorageSourceAttachPrepareBlockdev(n)))
+ goto cleanup;
- if (VIR_APPEND_ELEMENT(data->backends, data->nbackends, backend) < 0)
- goto cleanup;
+ if (qemuBuildStorageSourceAttachPrepareCommon(n, backend, qemuCaps) < 0)
+ goto cleanup;
+
+ if (VIR_APPEND_ELEMENT(data->backends, data->nbackends, backend) <
0)
+ goto cleanup;
+ }
+ } else {
+ if (!(backend = qemuBuildStorageSourceAttachPrepareDrive(disk, qemuCaps)))
+ goto cleanup;
+
+ if (qemuBuildStorageSourceAttachPrepareCommon(disk->src, backend, qemuCaps)
< 0)
+ goto cleanup;
+
+ if (VIR_APPEND_ELEMENT(data->backends, data->nbackends, backend) < 0)
+ goto cleanup;
+ }
VIR_STEAL_PTR(ret, data);
@@ -546,6 +586,10 @@ qemuHotplugDiskSourceAttach(qemuMonitorPtr mon,
return -1;
}
+ if (data->corProps &&
+ qemuMonitorAddObject(mon, &data->corProps, &data->corAlias) <
0)
+ return -1;
+
return 0;
}
@@ -566,6 +610,9 @@ qemuHotplugDiskSourceRemove(qemuMonitorPtr mon,
{
size_t i;
+ if (data->corAlias)
+ ignore_value(qemuMonitorDelObject(mon, data->corAlias));
+
for (i = 0; i < data->nbackends; i++)
qemuBlockStorageSourceAttachRollback(mon, data->backends[i]);
}
--
2.16.2