From: NeilBrown <neilb@suse.de>
Date: Tue, 3 May 2011 05:13:46 +0000 (+1000)
Subject: roll: add a possibly-useful assertion.
X-Git-Url: http://git.neil.brown.name/?a=commitdiff_plain;h=56e0f85487184abbae4c3011848d54546844460b;p=LaFS.git

roll: add a possibly-useful assertion.

Signed-off-by: NeilBrown <neilb@suse.de>
---

diff --git a/roll.c b/roll.c
index b6d8e33..11acf65 100644
--- a/roll.c
+++ b/roll.c
@@ -504,6 +504,10 @@ roll_block(struct fs *fs, int fsnum, int inum, int trunc,
 		lafs_pin_dblock(blk, CleanSpace); /* cannot fail during ! ->rolled */
 
 		lafs_iolock_block(&blk->b);
+		/* The '1' in lafs_summary_update assumes SegRef is set, so
+		 * assert that it is.
+		 */
+		LAFS_BUG(!test_bit(B_SegRef, &blk->b.flags), &blk->b);
 		lafs_summary_update(fs, blk->b.inode, blk->b.physaddr, baddr,
 				    0, fs->phase, 1);
 		blk->b.physaddr = baddr;