[PATCH 5/7] mkfs: 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 all the metadata we wrote in the process of formatting
the filesystem have been written correctly, or exit with failure.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 mkfs/xfs_mkfs.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)


diff --git a/mkfs/xfs_mkfs.c b/mkfs/xfs_mkfs.c
index 0f84860f..bbc2da83 100644
--- a/mkfs/xfs_mkfs.c
+++ b/mkfs/xfs_mkfs.c
@@ -3940,8 +3940,11 @@ main(
 	(XFS_BUF_TO_SBP(buf))->sb_inprogress = 0;
 	libxfs_writebuf(buf, LIBXFS_EXIT_ON_FAILURE);
 
-	libxfs_umount(mp);
-	libxfs_destroy(&xi);
+	/* Exit w/ failure if anything failed to get written to our new fs. */
+	error = -libxfs_umount(mp);
+	if (error)
+		exit(1);
 
+	libxfs_destroy(&xi);
 	return 0;
 }