[PATCH 1/6] xfs: fix xfs_rtrmapbt_mem_cursor for non-rmap filesystems

From: Darrick J. Wong <[email protected]>

It's possible to construct an in-memory rtrmap btree for filesystems
that don't have the rmap feature enabled.  The kernel doesn't do this,
but xfs_repair will, if asked to reindex a filesystem that has rtreflink
enabled but not rtrmap.  Therefore, we must create the cursor with
enough levels to handle a maximally sized btree possible.

Cc: <[email protected]> # v6.14
Fixes: 4a61f12eb11958 ("xfs: create a shadow rmap btree during realtime rmap repair")
Signed-off-by: "Darrick J. Wong" <[email protected]>
---
 fs/xfs/libxfs/xfs_rtrmap_btree.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)


diff --git a/fs/xfs/libxfs/xfs_rtrmap_btree.c b/fs/xfs/libxfs/xfs_rtrmap_btree.c
index 0cb2113d5b4045..a15e460a1ec7f4 100644
--- a/fs/xfs/libxfs/xfs_rtrmap_btree.c
+++ b/fs/xfs/libxfs/xfs_rtrmap_btree.c
@@ -618,7 +618,7 @@ xfs_rtrmapbt_mem_cursor(
 	struct xfs_btree_cur	*cur;
 
 	cur = xfs_btree_alloc_cursor(mp, tp, &xfs_rtrmapbt_mem_ops,
-			mp->m_rtrmap_maxlevels, xfs_rtrmapbt_cur_cache);
+			xfs_rtrmapbt_maxlevels_ondisk(), xfs_rtrmapbt_cur_cache);
 	cur->bc_mem.xfbtree = xfbt;
 	cur->bc_nlevels = xfbt->nlevels;
 	cur->bc_group = xfs_group_hold(rtg_group(rtg));