[RFC PATCH 08/11] xfs: have sync_fs op report writeback errors when passed a since pointer

[Jeff Layton]

From: Jeff Layton <jlayton@xxxxxxxxxx>

Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
---
 fs/xfs/xfs_super.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 9255de2767b4..7dc847f48f9f 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1092,6 +1092,7 @@ xfs_fs_sync_fs(
 	int			wait,
 	errseq_t		*since)
 {
+	int			ret;
 	struct xfs_mount	*mp = XFS_M(sb);
 
 	/*
@@ -1110,7 +1111,13 @@ xfs_fs_sync_fs(
 		flush_delayed_work(&mp->m_log->l_work);
 	}
 out:
-	return __sync_blockdev(sb->s_bdev, wait);
+	ret = __sync_blockdev(sb->s_bdev, wait);
+	if (since) {
+		int ret2 = errseq_check_and_advance(&sb->s_wb_err, since);
+		if (ret == 0)
+			ret = ret2;
+	}
+	return ret;
 }
 
 STATIC int
-- 
2.17.0