[Cluster-devel] [PATCH 07/11] gfs2: Fix marking bitmaps non-full

[Andreas Gruenbacher <agruenba@redhat.com>]

Reservations in gfs can span multiple gfs2_bitmaps (but they won't span
multiple resource groups).  When removing a reservation, we want to
clear the GBF_FULL flags of all involved gfs2_bitmaps, not just that of
the first bitmap.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
 fs/gfs2/rgrp.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index ee6ea7d8cf44..ee981085db33 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -672,7 +672,7 @@ static void __rs_deltree(struct gfs2_blkreserv *rs)
 	RB_CLEAR_NODE(&rs->rs_node);
 
 	if (rs->rs_free) {
-		struct gfs2_bitmap *bi;
+		struct gfs2_bitmap *start, *last;
 
 		/* return reserved blocks to the rgrp */
 		BUG_ON(rs->rs_rgd->rd_reserved < rs->rs_free);
@@ -682,10 +682,15 @@ static void __rs_deltree(struct gfs2_blkreserv *rs)
 		   contiguous with a span of free blocks that follows. Still,
 		   it will force the number to be recalculated later. */
 		rgd->rd_extfail_pt += rs->rs_free;
+		start = gfs2_block_to_bitmap(rgd, rs->rs_start);
+		last = gfs2_block_to_bitmap(rgd,
+				rs->rs_start + rs->rs_free - 1);
 		rs->rs_free = 0;
-		bi = gfs2_block_to_bitmap(rgd, rs->rs_start);
-		if (bi)
-			clear_bit(GBF_FULL, &bi->bi_flags);
+		if (!start || !last)
+			return;
+		do
+			clear_bit(GBF_FULL, &start->bi_flags);
+		while (start++ != last);
 	}
 }
 
-- 
2.17.1