From: Josef Bacik <josef@toxicpanda.com>
Date: Fri, 12 Mar 2021 15:25:12 -0500
Subject: btrfs: return an error from btrfs_record_root_in_trans
Git-commit: 03a7e111a94961092e2832a6259d39c8c01d6def
Patch-mainline: v5.13-rc1
References: bsc#1187833

We can create a reloc root when we record the root in the trans, which
can fail for all sorts of different reasons.  Propagate this error up
the chain of callers.  Future patches will fix the callers of
btrfs_record_root_in_trans() to handle the error.

Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Acked-by: Nikolay Borisov <nborisov@suse.com>
---
 fs/btrfs/transaction.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -308,6 +308,7 @@ static int record_root_in_trans(struct b
 			       int force)
 {
 	struct btrfs_fs_info *fs_info = root->fs_info;
+	int ret = 0;

 	if ((test_bit(BTRFS_ROOT_REF_COWS, &root->state) &&
 	    root->last_trans < trans->transid) || force) {
@@ -356,11 +357,11 @@ static int record_root_in_trans(struct b
 		 * lock.  smp_wmb() makes sure that all the writes above are
 		 * done before we pop in the zero below
 		 */
-		btrfs_init_reloc_root(trans, root);
+		ret = btrfs_init_reloc_root(trans, root);
 		smp_mb__before_atomic();
 		clear_bit(BTRFS_ROOT_IN_TRANS_SETUP, &root->state);
 	}
-	return 0;
+	return ret;
 }