linux-kernel - [PATCH v2 4/9] nilfs2: set the mapping error when calling SetPageError on writeback

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Date:   Wed,  8 Mar 2017 11:29:29 -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 4/9] nilfs2: set the mapping error when calling SetPageError on writeback

In a later patch, we're going to want to make the fsync codepath not do
a TestClearPageError call as that can override the error set in the
address space. To do that though, we need to ensure that filesystems
that are relying on the PG_error bit for reporting writeback errors
also set an error in the address space.

Ensure that this is set in nilfs2.

Cc: Ryusuke Konishi <konishi.ryusuke@....ntt.co.jp>
Signed-off-by: Jeff Layton <jlayton@...hat.com>
---
 fs/nilfs2/segment.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index febed1217b3f..612d4b446793 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -1745,6 +1745,7 @@ static void nilfs_end_page_io(struct page *page, int err)
 	} else {
 		__set_page_dirty_nobuffers(page);
 		SetPageError(page);
+		mapping_set_error(page_mapping(page), err);
 	}
 
 	end_page_writeback(page);
-- 
2.9.3