1 files changed, 41 insertions, 0 deletions

diff --git a/fs/xfs/xfs_ialloc_btree.c b/fs/xfs/xfs_ialloc_btree.c
index 83502f3edef0..8c0c4748a8df 100644
--- a/fs/xfs/xfs_ialloc_btree.c
+++ b/fs/xfs/xfs_ialloc_btree.c
@@ -2076,3 +2076,44 @@ xfs_inobt_update(
         }
         return 0;
 }
+
+STATIC struct xfs_btree_cur *
+xfs_inobt_dup_cursor(
+        struct xfs_btree_cur    *cur)
+{
+        return xfs_inobt_init_cursor(cur->bc_mp, cur->bc_tp,
+                        cur->bc_private.a.agbp, cur->bc_private.a.agno);
+}
+
+static const struct xfs_btree_ops xfs_inobt_ops = {
+        .dup_cursor             = xfs_inobt_dup_cursor,
+};
+
+/*
+ * Allocate a new inode btree cursor.
+ */
+struct xfs_btree_cur *                          /* new inode btree cursor */
+xfs_inobt_init_cursor(
+        struct xfs_mount        *mp,            /* file system mount point */
+        struct xfs_trans        *tp,            /* transaction pointer */
+        struct xfs_buf          *agbp,          /* buffer for agi structure */
+        xfs_agnumber_t          agno)           /* allocation group number */
+{
+        struct xfs_agi          *agi = XFS_BUF_TO_AGI(agbp);
+        struct xfs_btree_cur    *cur;
+
+        cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_SLEEP);
+
+        cur->bc_tp = tp;
+        cur->bc_mp = mp;
+        cur->bc_nlevels = be32_to_cpu(agi->agi_level);
+        cur->bc_btnum = XFS_BTNUM_INO;
+        cur->bc_blocklog = mp->m_sb.sb_blocklog;
+
+        cur->bc_ops = &xfs_inobt_ops;
+
+        cur->bc_private.a.agbp = agbp;
+        cur->bc_private.a.agno = agno;
+
+        return cur;
+}