linux-ext4 - [PATCH v3 3/5] ext4: remove write io error check before read inode block

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Message-ID: <20200620025427.1756360-4-yi.zhang@huawei.com>
Date:   Sat, 20 Jun 2020 10:54:25 +0800
From:   "zhangyi (F)" <yi.zhang@...wei.com>
To:     <linux-ext4@...r.kernel.org>, <tytso@....edu>, <jack@...e.cz>
CC:     <adilger.kernel@...ger.ca>, <zhangxiaoxu5@...wei.com>,
        <yi.zhang@...wei.com>, <linux-fsdevel@...r.kernel.org>
Subject: [PATCH v3 3/5] ext4: remove write io error check before read inode block

After we add async write error check in ext4_journal_get_write_access(),
we can remove the partial fix for filesystem inconsistency problem
caused by reading old data from disk, which in commit <9c83a923c67d>
"ext4: don't read inode block if the buffer has a write error".

Signed-off-by: zhangyi (F) <yi.zhang@...wei.com>
---
 fs/ext4/inode.c | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index f68afc5c0b2d..79b73a86ef6c 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4289,15 +4289,6 @@ static int __ext4_get_inode_loc(struct inode *inode,
 	if (!buffer_uptodate(bh)) {
 		lock_buffer(bh);
 
-		/*
-		 * If the buffer has the write error flag, we have failed
-		 * to write out another inode in the same block.  In this
-		 * case, we don't have to read the block because we may
-		 * read the old inode data successfully.
-		 */
-		if (buffer_write_io_error(bh) && !buffer_uptodate(bh))
-			set_buffer_uptodate(bh);
-
 		if (buffer_uptodate(bh)) {
 			/* someone brought it uptodate while we waited */
 			unlock_buffer(bh);
-- 
2.25.4