[PATCH 07/29] xfs: realtime rmap btree transaction reservations

[Darrick J. Wong]

Make sure that there's enough log reservation to handle mapping
and unmapping realtime extents.  We have to reserve enough space
to handle a split in the rtrmapbt to add the record and a second
split in the regular rmapbt to record the rtrmapbt split.

Signed-off-by: Darrick J. Wong <darrick.wong at oracle.com>
---
 libxfs/xfs_trans_resv.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)


diff --git a/libxfs/xfs_trans_resv.c b/libxfs/xfs_trans_resv.c
index 5152a5b..7947d8e 100644
--- a/libxfs/xfs_trans_resv.c
+++ b/libxfs/xfs_trans_resv.c
@@ -82,7 +82,8 @@ xfs_allocfree_log_count(
 
 	blocks = num_ops * 2 * (2 * mp->m_ag_maxlevels - 1);
 	if (xfs_sb_version_hasrmapbt(&mp->m_sb))
-		blocks += num_ops * (2 * mp->m_rmap_maxlevels - 1);
+		blocks += max(num_ops * (2 * mp->m_rmap_maxlevels - 1),
+			      num_ops * (2 * mp->m_rtrmap_maxlevels - 1));
 	if (xfs_sb_version_hasreflink(&mp->m_sb))
 		blocks += num_ops * (2 * mp->m_refc_maxlevels - 1);