drive and blockdev backup cannot use readonly bitmaps, because the sync=incremental mechanism actually edits the bitmaps on success.
If you really want to do this operation, use a copied bitmap. Signed-off-by: John Snow <[email protected]> --- blockdev.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/blockdev.c b/blockdev.c index 5d74479ba7..c8255dda0b 100644 --- a/blockdev.c +++ b/blockdev.c @@ -3526,7 +3526,7 @@ static BlockJob *do_drive_backup(DriveBackup *backup, JobTxn *txn, bdrv_unref(target_bs); goto out; } - if (bdrv_dirty_bitmap_check(bmap, BDRV_BITMAP_ALLOW_RO, errp)) { + if (bdrv_dirty_bitmap_check(bmap, BDRV_BITMAP_DEFAULT, errp)) { goto out; } } @@ -3636,7 +3636,7 @@ BlockJob *do_blockdev_backup(BlockdevBackup *backup, JobTxn *txn, error_setg(errp, "Bitmap '%s' could not be found", backup->bitmap); goto out; } - if (bdrv_dirty_bitmap_check(bmap, BDRV_BITMAP_ALLOW_RO, errp)) { + if (bdrv_dirty_bitmap_check(bmap, BDRV_BITMAP_DEFAULT, errp)) { goto out; } } -- 2.17.2
