linux-ext4 - [PATCH v8 15/18] fs: convert __generic_file_fsync to use errseq

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Message-Id: <20170629131954.28733-16-jlayton@kernel.org>
Date:   Thu, 29 Jun 2017 09:19:51 -0400
From:   jlayton@...nel.org
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Al Viro <viro@...IV.linux.org.uk>, Jan Kara <jack@...e.cz>,
        tytso@....edu, axboe@...nel.dk, mawilcox@...rosoft.com,
        ross.zwisler@...ux.intel.com, corbet@....net,
        Chris Mason <clm@...com>, Josef Bacik <jbacik@...com>,
        David Sterba <dsterba@...e.com>,
        "Darrick J . Wong" <darrick.wong@...cle.com>
Cc:     Carlos Maiolino <cmaiolino@...hat.com>,
        Eryu Guan <eguan@...hat.com>,
        David Howells <dhowells@...hat.com>,
        Christoph Hellwig <hch@...radead.org>,
        Liu Bo <bo.li.liu@...cle.com>, linux-fsdevel@...r.kernel.org,
        linux-mm@...ck.org, linux-ext4@...r.kernel.org,
        linux-xfs@...r.kernel.org, linux-btrfs@...r.kernel.org,
        linux-block@...r.kernel.org
Subject: [PATCH v8 15/18] fs: convert __generic_file_fsync to use errseq_t based reporting

From: Jeff Layton <jlayton@...hat.com>

Signed-off-by: Jeff Layton <jlayton@...hat.com>
---
 fs/libfs.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/fs/libfs.c b/fs/libfs.c
index 1dec90819366..3aabe553fc45 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -974,7 +974,7 @@ int __generic_file_fsync(struct file *file, loff_t start, loff_t end,
 	int err;
 	int ret;
 
-	err = filemap_write_and_wait_range(inode->i_mapping, start, end);
+	err = file_write_and_wait_range(file, start, end);
 	if (err)
 		return err;
 
@@ -991,8 +991,11 @@ int __generic_file_fsync(struct file *file, loff_t start, loff_t end,
 
 out:
 	inode_unlock(inode);
-	err = filemap_check_errors(inode->i_mapping);
-	return ret ? ret : err;
+	/* check and advance again to catch errors after syncing out buffers */
+	err = file_check_and_advance_wb_err(file);
+	if (ret == 0)
+		ret = err;
+	return ret;
 }
 EXPORT_SYMBOL(__generic_file_fsync);
 
-- 
2.13.0