From: Josef Bacik <jbacik@fb.com>
Date: Mon, 5 Oct 2015 14:35:29 +0000 (-0400)
Subject: Btrfs: fix qgroup sanity tests
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=d9ee522ba3ab51b7e3c6dfcf3743216371bc810f;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

Btrfs: fix qgroup sanity tests

With my changes to allow us to find old roots when resolving indirect refs I
introduced a regression to the sanity tests.  Since we don't really care to go
down into the fs roots we just need to have the old behavior of returning ENOENT
for dummy roots for the sanity tests.  In the future if we want to get fancy we
can populate the test fs trees with the references as well.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
---

diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index ecbc63d3143e..2adc152a32e3 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -362,6 +362,12 @@ static int __resolve_indirect_ref(struct btrfs_fs_info *fs_info,
 		goto out;
 	}
 
+	if (btrfs_test_is_dummy_root(root)) {
+		srcu_read_unlock(&fs_info->subvol_srcu, index);
+		ret = -ENOENT;
+		goto out;
+	}
+
 	if (path->search_commit_root)
 		root_level = btrfs_header_level(root->commit_root);
 	else if (time_seq == (u64)-1)