linux-ext4 - [PATCH 3/3] ext4: track writeback errors using the generic tracking infrastructure

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Date:   Mon, 31 Dec 2018 14:48:36 -0500
From:   Theodore Ts'o <tytso@....edu>
To:     Ext4 Developers List <linux-ext4@...r.kernel.org>
CC:     Theodore Ts'o <tytso@....edu>, <stable@...nel.org>
Subject: [PATCH 3/3] ext4: track writeback errors using the generic tracking infrastructure

We already using mapping_set_error() in fs/ext4/page_io.c, so all we
need to do is to use file_check_and_advance_wb_err() when handling
fsync() requests in ext4_sync_file().

Signed-off-by: Theodore Ts'o <tytso@....edu>
Cc: stable@...nel.org
---
 fs/ext4/fsync.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c
index 87a7ff00ef62..712f00995390 100644
--- a/fs/ext4/fsync.c
+++ b/fs/ext4/fsync.c
@@ -164,6 +164,9 @@ int ext4_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
 			ret = err;
 	}
 out:
+	err = file_check_and_advance_wb_err(file);
+	if (ret == 0)
+		ret = err;
 	trace_ext4_sync_file_exit(inode, ret);
 	return ret;
 }
-- 
2.19.1