[PATCH 27/51] xfs_repair: fix fino_bno calculation when rmapbt is enabled

[Darrick J. Wong]

In xfs_repair, we calculate where we think mkfs put the root inode
block.  However, the rmapbt component doesn't account for the fact
that mkfs reserved 2 AGFL blocks for the rmapbt, so its calculation
is off by a bit.  This leads to it complaining (incorrectly) about the
root inode block being in the wrong place and blowing up.

Signed-off-by: Darrick J. Wong <darrick.wong at oracle.com>
---
 repair/xfs_repair.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)


diff --git a/repair/xfs_repair.c b/repair/xfs_repair.c
index 933986a..a464cd3 100644
--- a/repair/xfs_repair.c
+++ b/repair/xfs_repair.c
@@ -416,8 +416,10 @@ calc_mkfs(xfs_mount_t *mp)
 	fino_bno = inobt_root + (2 * min(2, mp->m_ag_maxlevels)) + 1;
 	if (xfs_sb_version_hasfinobt(&mp->m_sb))
 		fino_bno++;
-	if (xfs_sb_version_hasrmapbt(&mp->m_sb))
+	if (xfs_sb_version_hasrmapbt(&mp->m_sb)) {
+		fino_bno += min(2, mp->m_ag_maxlevels);
 		fino_bno++;
+	}
 
 	/*
 	 * If the log is allocated in the first allocation group we need to