[PATCH v2 6/7] xfs_repair: check that metadata updates have been committed

["Darrick J. Wong" <darrick.wong@oracle.com>]

From: Darrick J. Wong <darrick.wong@oracle.com>

Make sure that any metadata that we repaired or regenerated has been
written to disk.  If that fails, exit with 1 to signal that there are
still errors in the filesystem.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
---
v2: use the usual error reporting to log and exit
---
 repair/xfs_repair.c |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/repair/xfs_repair.c b/repair/xfs_repair.c
index eb1ce546..2ebf6a5b 100644
--- a/repair/xfs_repair.c
+++ b/repair/xfs_repair.c
@@ -703,6 +703,7 @@ main(int argc, char **argv)
 	struct xfs_sb	psb;
 	int		rval;
 	struct xfs_ino_geometry	*igeo;
+	int		error;
 
 	progname = basename(argv[0]);
 	setlocale(LC_ALL, "");
@@ -1104,7 +1105,13 @@ _("Note - stripe unit (%d) and width (%d) were copied from a backup superblock.\
 	 */
 	libxfs_bcache_flush();
 	format_log_max_lsn(mp);
-	libxfs_umount(mp);
+
+	/* Report failure if anything failed to get written to our fs. */
+	error = -libxfs_umount(mp);
+	if (error)
+		do_error(
+	_("File system metadata writeout failed, err=%d.  Re-run xfs_repair."),
+				error);
 
 	if (x.rtdev)
 		libxfs_device_close(x.rtdev);