[libvirt] [PATCH RFC 11/11] qemu: backup: Implement support for backup disk bitmap name configuration

[Peter Krempa]

Use the user-configured name of the bitmap when merging the appropriate
bitmaps for an excremental backup so that the user can see it as
configured. Additionally expose the default bitmap name if nothing is
configured.

Signed-off-by: Peter Krempa <pkrempa at redhat.com>
---
 src/qemu/qemu_backup.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/qemu/qemu_backup.c b/src/qemu/qemu_backup.c
index 54e726ca4a..795026d24b 100644
--- a/src/qemu/qemu_backup.c
+++ b/src/qemu/qemu_backup.c
@@ -322,7 +322,10 @@ qemuBackupDiskPrepareDataOne(virDomainObjPtr vm,
         return -1;

     if (incremental) {
-        dd->incrementalBitmap = g_strdup_printf("backup-%s", dd->domdisk->dst);
+        if (dd->backupdisk->exportbitmap)
+            dd->incrementalBitmap = g_strdup(dd->backupdisk->exportbitmap);
+        else
+            dd->incrementalBitmap = g_strdup_printf("backup-%s", dd->domdisk->dst);

         if (qemuBackupDiskPrepareOneBitmaps(dd, actions, incremental,
                                             blockNamedNodeData) < 0)
@@ -368,6 +371,10 @@ static int
 qemuBackupDiskPrepareDataOnePull(virJSONValuePtr actions,
                                  struct qemuBackupDiskData *dd)
 {
+    if (!dd->backupdisk->exportbitmap &&
+        dd->incrementalBitmap)
+        dd->backupdisk->exportbitmap = g_strdup(dd->incrementalBitmap);
+
     if (qemuMonitorTransactionBackup(actions,
                                      dd->domdisk->src->nodeformat,
                                      dd->blockjob->name,
-- 
2.23.0