linux-kernel - [PATCH v3 03/11] fs: Introduce ->corrupted

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Message-ID: <20210208105530.3072869-4-ruansy.fnst@cn.fujitsu.com>
Date:   Mon, 8 Feb 2021 18:55:22 +0800
From:   Shiyang Ruan <ruansy.fnst@...fujitsu.com>
To:     <linux-kernel@...r.kernel.org>, <linux-xfs@...r.kernel.org>,
        <linux-nvdimm@...ts.01.org>, <linux-mm@...ck.org>,
        <linux-fsdevel@...r.kernel.org>, <dm-devel@...hat.com>
CC:     <darrick.wong@...cle.com>, <dan.j.williams@...el.com>,
        <david@...morbit.com>, <hch@....de>, <agk@...hat.com>,
        <snitzer@...hat.com>, <rgoldwyn@...e.de>, <qi.fuli@...itsu.com>,
        <y-goto@...itsu.com>
Subject: [PATCH v3 03/11] fs: Introduce ->corrupted_range() for superblock

Memory failure occurs in fsdax mode will finally be handled in
filesystem.  We introduce this interface to find out files or metadata
affected by the corrupted range, and try to recover the corrupted data
if possiable.

Signed-off-by: Shiyang Ruan <ruansy.fnst@...fujitsu.com>
---
 include/linux/fs.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/fs.h b/include/linux/fs.h
index fd47deea7c17..4cc9ff9caa87 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1963,6 +1963,8 @@ struct super_operations {
 				  struct shrink_control *);
 	long (*free_cached_objects)(struct super_block *,
 				    struct shrink_control *);
+	int (*corrupted_range)(struct super_block *sb, struct block_device *bdev,
+			       loff_t offset, size_t len, void *data);
 };
 
 /*
-- 
2.30.0