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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org,
	stable@vger.kernel.org
Cc: Boris Burkov <boris@bur.io>,
	Qu Wenruo <wqu@suse.com>,
	David Sterba <dsterba@suse.com>,
	Sasha Levin <sashal@kernel.org>,
	clm@fb.com,
	josef@toxicpanda.com,
	linux-btrfs@vger.kernel.org
Subject: [PATCH AUTOSEL 5.4 4/9] btrfs: always clear PERTRANS metadata during commit
Date: Mon, 22 Apr 2024 19:20:09 -0400
Message-ID: <20240422232020.1615476-4-sashal@kernel.org>
In-Reply-To: <20240422232020.1615476-1-sashal@kernel.org>
References: <20240422232020.1615476-1-sashal@kernel.org>
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From: Boris Burkov <boris@bur.io>

[ Upstream commit 6e68de0bb0ed59e0554a0c15ede7308c47351e2d ]

It is possible to clear a root's IN_TRANS tag from the radix tree, but
not clear its PERTRANS, if there is some error in between. Eliminate
that possibility by moving the free up to where we clear the tag.

Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Boris Burkov <boris@bur.io>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/btrfs/transaction.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 89ffc02554069..1d25bf0c55ccf 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -1226,6 +1226,7 @@ static noinline int commit_fs_roots(struct btrfs_trans_handle *trans)
 			radix_tree_tag_clear(&fs_info->fs_roots_radix,
 					(unsigned long)root->root_key.objectid,
 					BTRFS_ROOT_TRANS_TAG);
+			btrfs_qgroup_free_meta_all_pertrans(root);
 			spin_unlock(&fs_info->fs_roots_radix_lock);
 
 			btrfs_free_log(trans, root);
@@ -1250,7 +1251,6 @@ static noinline int commit_fs_roots(struct btrfs_trans_handle *trans)
 			if (ret2)
 				return ret2;
 			spin_lock(&fs_info->fs_roots_radix_lock);
-			btrfs_qgroup_free_meta_all_pertrans(root);
 		}
 	}
 	spin_unlock(&fs_info->fs_roots_radix_lock);
-- 
2.43.0