From d93d98d98f308884d44ccad5f2483dcced1331c1 Mon Sep 17 00:00:00 2001
From: Tor Egge <tegge@FreeBSD.org>
Date: Mon, 15 May 2006 23:18:49 +0000
Subject: [PATCH] Copy last block on file system again after file system has
 been suspended.

Obtained from:	NetBSD
---
 sys/ufs/ffs/ffs_snapshot.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/sys/ufs/ffs/ffs_snapshot.c b/sys/ufs/ffs/ffs_snapshot.c
index 0c011eaafb34..3b1f99bf78b0 100644
--- a/sys/ufs/ffs/ffs_snapshot.c
+++ b/sys/ufs/ffs/ffs_snapshot.c
@@ -424,6 +424,17 @@ restart:
 	}
 	if (collectsnapstats)
 		nanotime(&starttime);
+
+	/* The last block might have changed.  Copy it again to be sure. */
+	error = UFS_BALLOC(vp, lblktosize(fs, (off_t)(numblks - 1)),
+	    fs->fs_bsize, KERNCRED, BA_CLRBUF, &bp);
+	if (error != 0)
+		goto out1;
+	error = readblock(vp, bp, numblks - 1);
+	bp->b_flags |= B_VALIDSUSPWRT;
+	bawrite(bp);
+	if (error != 0)
+		goto out1;
 	/*
 	 * First, copy all the cylinder group maps that have changed.
 	 */