linux-kernel - [PATCH v2 5/9] dax: set error in mapping when writeback fails

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Message-Id: <20170308162934.21989-6-jlayton@redhat.com>
Date:   Wed,  8 Mar 2017 11:29:30 -0500
From:   Jeff Layton <jlayton@...hat.com>
To:     viro@...iv.linux.org.uk, akpm@...ux-foundation.org
Cc:     konishi.ryusuke@....ntt.co.jp, linux-fsdevel@...r.kernel.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        linux-nilfs@...r.kernel.org, ross.zwisler@...ux.intel.com,
        jack@...e.cz, neilb@...e.com, openosd@...il.com, adilger@...ger.ca,
        James.Bottomley@...senPartnership.com
Subject: [PATCH v2 5/9] dax: set error in mapping when writeback fails

In order to get proper error codes from fsync, we must set an error in
the mapping range when writeback fails.

Signed-off-by: Jeff Layton <jlayton@...hat.com>
---
 fs/dax.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/dax.c b/fs/dax.c
index de622d4282a6..a601137286ed 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -892,8 +892,10 @@ int dax_writeback_mapping_range(struct address_space *mapping,
 
 			ret = dax_writeback_one(bdev, mapping, indices[i],
 					pvec.pages[i]);
-			if (ret < 0)
+			if (ret < 0) {
+				mapping_set_error(mapping, ret);
 				return ret;
+			}
 		}
 	}
 	return 0;
-- 
2.9.3