From 361e24ef2f568fe286f7fcc642e1cc8e626f4a88 Mon Sep 17 00:00:00 2001
From: Luke Shumaker <lukeshu@lukeshu.com>
Date: Thu, 7 Jul 2022 04:02:22 -0600
Subject: clear-bad-nodes: support root nodes

---
 pkg/btrfs/btrfsitem/item_uuid.go | 34 +++++-----------------------------
 1 file changed, 5 insertions(+), 29 deletions(-)

(limited to 'pkg/btrfs/btrfsitem')

diff --git a/pkg/btrfs/btrfsitem/item_uuid.go b/pkg/btrfs/btrfsitem/item_uuid.go
index 6b47547..45543b3 100644
--- a/pkg/btrfs/btrfsitem/item_uuid.go
+++ b/pkg/btrfs/btrfsitem/item_uuid.go
@@ -5,36 +5,12 @@ import (
 	"lukeshu.com/btrfs-tools/pkg/btrfs/internal"
 )
 
-// The Key for this item is a UUID, and the item is a list of
-// subvolume IDs (ObjectIDs) that that UUID maps to.
+// The Key for this item is a UUID, and the item is a subvolume IDs
+// that that UUID maps to.
 //
 // key.objectid = first half of UUID
 // key.offset = second half of UUID
-type UUIDMap []internal.ObjID // UUID_SUBVOL=251 UUID_RECEIVED_SUBVOL=252
-
-func (o *UUIDMap) UnmarshalBinary(dat []byte) (int, error) {
-	*o = nil
-	var n int
-	for len(dat) > n {
-		var subvolID internal.ObjID
-		_n, err := binstruct.Unmarshal(dat[n:], &subvolID)
-		n += _n
-		if err != nil {
-			return n, err
-		}
-		*o = append(*o, subvolID)
-	}
-	return n, nil
-}
-
-func (o UUIDMap) MarshalBinary() ([]byte, error) {
-	var ret []byte
-	for _, subvolID := range o {
-		bs, err := binstruct.Marshal(subvolID)
-		ret = append(ret, bs...)
-		if err != nil {
-			return ret, err
-		}
-	}
-	return ret, nil
+type UUIDMap struct { // UUID_SUBVOL=251 UUID_RECEIVED_SUBVOL=252
+	ObjID         internal.ObjID `bin:"off=0, siz=8"`
+	binstruct.End `bin:"off=8"`
 }
-- 
cgit v1.2.3-2-g168b