Message ID | 1503965694-10794-20-git-send-email-mdroth@linux.vnet.ibm.com |
---|---|
State | New |
Headers | show
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Series |
Patch Round-up for stable 2.9.1, freeze on 2017-09-04
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expand
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diff --git a/blockdev.c b/blockdev.c index e2f9c1e..841200e 100644 --- a/blockdev.c +++ b/blockdev.c @@ -3170,6 +3170,7 @@ static BlockJob *do_drive_backup(DriveBackup *backup, BlockJobTxn *txn, Error *local_err = NULL; int flags; int64_t size; + bool set_backing_hd = false; if (!backup->has_speed) { backup->speed = 0; @@ -3220,6 +3221,8 @@ static BlockJob *do_drive_backup(DriveBackup *backup, BlockJobTxn *txn, } if (backup->sync == MIRROR_SYNC_MODE_NONE) { source = bs; + flags |= BDRV_O_NO_BACKING; + set_backing_hd = true; } size = bdrv_getlength(bs); @@ -3246,7 +3249,9 @@ static BlockJob *do_drive_backup(DriveBackup *backup, BlockJobTxn *txn, } if (backup->format) { - options = qdict_new(); + if (!options) { + options = qdict_new(); + } qdict_put_str(options, "driver", backup->format); } @@ -3257,6 +3262,14 @@ static BlockJob *do_drive_backup(DriveBackup *backup, BlockJobTxn *txn, bdrv_set_aio_context(target_bs, aio_context); + if (set_backing_hd) { + bdrv_set_backing_hd(target_bs, source, &local_err); + if (local_err) { + bdrv_unref(target_bs); + goto out; + } + } + if (backup->has_bitmap) { bmap = bdrv_find_dirty_bitmap(bs, backup->bitmap); if (!bmap) {