linux-ext4 - [PATCH 01/10] ext4: move inode eio simulation behind io completeion

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Message-ID: <20200526071754.33819-2-yi.zhang@huawei.com>
Date:   Tue, 26 May 2020 15:17:45 +0800
From:   "zhangyi (F)" <yi.zhang@...wei.com>
To:     <linux-ext4@...r.kernel.org>
CC:     <tytso@....edu>, <jack@...e.cz>, <adilger.kernel@...ger.ca>,
        <yi.zhang@...wei.com>, <zhangxiaoxu5@...wei.com>
Subject: [PATCH 01/10] ext4: move inode eio simulation behind io completeion

Current EIO simulation of reading inode from disk isn't accurate since
it will not submit bio if the inode buffer is uptodate. Move this
simulation behind read bio completeion just like inode/block bitmap EIO
simulation does.

Signed-off-by: zhangyi (F) <yi.zhang@...wei.com>
---
 fs/ext4/inode.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 2a4aae6acdcb..e0f7e824b3b9 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4279,8 +4279,6 @@ static int __ext4_get_inode_loc(struct inode *inode,
 	bh = sb_getblk(sb, block);
 	if (unlikely(!bh))
 		return -ENOMEM;
-	if (ext4_simulate_fail(sb, EXT4_SIM_INODE_EIO))
-		goto simulate_eio;
 	if (!buffer_uptodate(bh)) {
 		lock_buffer(bh);
 
@@ -4378,8 +4376,8 @@ static int __ext4_get_inode_loc(struct inode *inode,
 		submit_bh(REQ_OP_READ, REQ_META | REQ_PRIO, bh);
 		blk_finish_plug(&plug);
 		wait_on_buffer(bh);
+		ext4_simulate_fail_bh(sb, bh, EXT4_SIM_INODE_EIO);
 		if (!buffer_uptodate(bh)) {
-		simulate_eio:
 			ext4_error_inode_block(inode, block, EIO,
 					       "unable to read itable block");
 			brelse(bh);
-- 
2.21.3