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From: Jeff Layton <>
Subject: [PATCH v4 2/2] buffer: record blockdev write errors in super_block that it backs
Date: Thu, 13 Feb 2020 16:02:55 -0500
Message-ID: <> (raw)
In-Reply-To: <>

From: Jeff Layton <>

When syncing out a block device (a'la __sync_blockdev), any error
encountered will only be recorded in the bd_inode's mapping. When the
blockdev contains a filesystem however, we'd like to also record the
error in the super_block that's stored there.

Make mark_buffer_write_io_error also record the error in the
corresponding super_block when a writeback error occurs and the block
device contains a mounted superblock.

Signed-off-by: Jeff Layton <>
 fs/buffer.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/buffer.c b/fs/buffer.c
index b8d28370cfd7..451f1be6e1a4 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -1166,6 +1166,8 @@ void mark_buffer_write_io_error(struct buffer_head *bh)
 		mapping_set_error(bh->b_page->mapping, -EIO);
 	if (bh->b_assoc_map)
 		mapping_set_error(bh->b_assoc_map, -EIO);
+	if (bh->b_bdev->bd_super)
+		errseq_set(&bh->b_bdev->bd_super->s_wb_err, -EIO);

  parent reply index

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-13 21:02 [PATCH v4 0/2] vfs: have syncfs() return error when there are writeback errors Jeff Layton
2020-02-13 21:02 ` [PATCH v4 1/2] vfs: track per-sb writeback errors and report them to syncfs Jeff Layton
2020-02-13 21:02 ` Jeff Layton [this message]
2020-03-03 13:10 ` [PATCH v4 0/2] vfs: have syncfs() return error when there are writeback errors Jeff Layton

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