btrfsck: add --init-csum-tree to replace the csum root with an empty one

This will effectively delete all of your crcs, but at least you'll
be able to mount the FS with nodatasum.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/disk-io.c b/disk-io.c
index 58aec02b..b21a87f8 100644
--- a/disk-io.c
+++ b/disk-io.c
@@ -787,7 +787,8 @@ static struct btrfs_fs_info *__open_ctree_fd(int fp, const char *path,
 				  BTRFS_CSUM_TREE_OBJECTID, csum_root);
 	if (ret) {
 		printk("Couldn't setup csum tree\n");
-		goto out_failed;
+		if (!partial)
+			goto out_failed;
 	}
 	csum_root->track_dirty = 1;