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block/dirty-bitmaps: prohibit readonly bitmaps for backups

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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 <jsnow@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-id: 20190301191545.8728-5-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
This commit is contained in:
John Snow 2019-03-12 12:05:49 -04:00
parent 3ae96d6684
commit a54a0c113b
1 changed files with 2 additions and 2 deletions
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4
blockdev.c
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@ -3535,7 +3535,7 @@ 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;
}
}
@ -3645,7 +3645,7 @@ 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;
}
}