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[Qemu-block] [PATCH v3 4/7] block/dirty-bitmaps: prohibit readonly bitma


From: John Snow
Subject: [Qemu-block] [PATCH v3 4/7] block/dirty-bitmaps: prohibit readonly bitmaps for backups
Date: Fri, 1 Mar 2019 14:15:42 -0500

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 <address@hidden>
---
 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




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