releases/6.19.12/xfs-factor-out-xfs_attr3_leaf_init.patch

From stable+bounces-232959-greg=kroah.com@vger.kernel.org Thu Apr  2 11:44:28 2026
From: Sasha Levin <sashal@kernel.org>
Date: Thu,  2 Apr 2026 05:44:11 -0400
Subject: xfs: factor out xfs_attr3_leaf_init
To: stable@vger.kernel.org
Cc: Long Li <leo.lilong@huawei.com>, "Darrick J. Wong" <djwong@kernel.org>, Carlos Maiolino <cem@kernel.org>, Sasha Levin <sashal@kernel.org>
Message-ID: <20260402094412.717776-2-sashal@kernel.org>

From: Long Li <leo.lilong@huawei.com>

[ Upstream commit e65bb55d7f8c2041c8fdb73cd29b0b4cad4ed847 ]

Factor out wrapper xfs_attr3_leaf_init function, which exported for
external use.

Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Long Li <leo.lilong@huawei.com>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
Stable-dep-of: b854e1c4eff3 ("xfs: close crash window in attr dabtree inactivation")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/xfs/libxfs/xfs_attr_leaf.c |   22 ++++++++++++++++++++++
 fs/xfs/libxfs/xfs_attr_leaf.h |    3 +++
 2 files changed, 25 insertions(+)

--- a/fs/xfs/libxfs/xfs_attr_leaf.c
+++ b/fs/xfs/libxfs/xfs_attr_leaf.c
@@ -1317,6 +1317,28 @@ xfs_attr3_leaf_create(
 }
 
 /*
+ * Reinitialize an existing attr fork block as an empty leaf, and attach
+ * the buffer to tp.
+ */
+int
+xfs_attr3_leaf_init(
+	struct xfs_trans	*tp,
+	struct xfs_inode	*dp,
+	xfs_dablk_t		blkno)
+{
+	struct xfs_buf		*bp = NULL;
+	struct xfs_da_args	args = {
+		.trans		= tp,
+		.dp		= dp,
+		.owner		= dp->i_ino,
+		.geo		= dp->i_mount->m_attr_geo,
+	};
+
+	ASSERT(tp != NULL);
+
+	return xfs_attr3_leaf_create(&args, blkno, &bp);
+}
+/*
  * Split the leaf node, rebalance, then add the new entry.
  *
  * Returns 0 if the entry was added, 1 if a further split is needed or a
--- a/fs/xfs/libxfs/xfs_attr_leaf.h
+++ b/fs/xfs/libxfs/xfs_attr_leaf.h
@@ -86,6 +86,9 @@ int	xfs_attr3_leaf_list_int(struct xfs_b
 /*
  * Routines used for shrinking the Btree.
  */
+
+int	xfs_attr3_leaf_init(struct xfs_trans *tp, struct xfs_inode *dp,
+				xfs_dablk_t blkno);
 int	xfs_attr3_leaf_toosmall(struct xfs_da_state *state, int *retval);
 void	xfs_attr3_leaf_unbalance(struct xfs_da_state *state,
 				       struct xfs_da_state_blk *drop_blk,