[24/43] btrfs: hold a ref on the root in record_reloc_root_in_trans
diff mbox series

Message ID 20200117134758.41494-25-josef@toxicpanda.com
State New
Headers show
Series
  • Cleanup how we handle root refs, part 2
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Commit Message

Josef Bacik Jan. 17, 2020, 1:47 p.m. UTC
We are recording this root in the transaction, so we need to hold a ref
on it until we do that.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
---
 fs/btrfs/relocation.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

Patch
diff mbox series

diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 953978ba46a4..04d7892093bf 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -2604,15 +2604,20 @@  static int record_reloc_root_in_trans(struct btrfs_trans_handle *trans,
 {
 	struct btrfs_fs_info *fs_info = reloc_root->fs_info;
 	struct btrfs_root *root;
+	int ret;
 
 	if (reloc_root->last_trans == trans->transid)
 		return 0;
 
 	root = read_fs_root(fs_info, reloc_root->root_key.offset);
+	if (!btrfs_grab_fs_root(root))
+		BUG();
 	BUG_ON(IS_ERR(root));
 	BUG_ON(root->reloc_root != reloc_root);
+	ret = btrfs_record_root_in_trans(trans, root);
+	btrfs_put_fs_root(root);
 
-	return btrfs_record_root_in_trans(trans, root);
+	return ret;
 }
 
 static noinline_for_stack