From 360deca5f2dfb26770a3753f403fd8674936896f Mon Sep 17 00:00:00 2001
From: Axel Burri <axel@tty0.ch>
Date: Wed, 17 Jun 2015 12:42:29 +0200
Subject: [PATCH] btrbk: correct parsing of btrfs subvolume list (allow id <
 top_level)

---
 ChangeLog |  1 +
 btrbk     | 10 +++++++---
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 804243c..2e8911a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,7 @@
 btrbk-current
 
   * Bugfix: fix sorting of dates in schedule().
+  * Bugfix: correct parsing of btrfs subvolume list (closes: #28).
 
 btrbk-0.19.2
 
diff --git a/btrbk b/btrbk
index c17421d..5e8a054 100755
--- a/btrbk
+++ b/btrbk
@@ -895,11 +895,15 @@ sub btr_tree($)
 
   foreach my $node (@$subvol_list)
   {
-    $id{$node->{id}} = $node;
-    $uuid_info{$node->{uuid}} = $node;
-
     $node->{SUBTREE} //= {};
 
+    $id{$node->{id}} = $node;
+    $uuid_info{$node->{uuid}} = $node;
+  }
+
+  # note: it is possible that id < top_level, e.g. after restoring
+  foreach my $node (@$subvol_list)
+  {
     # set SUBTREE / TOP_LEVEL node
     die unless exists($id{$node->{top_level}});
     my $top_level = $id{$node->{top_level}};