linux-ext4 - Re: [PATCH 1/3] ext4: move inode eio simulation behind io completeion

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 13 Aug 2021 14:55:07 +0200
From:   Jan Kara <jack@...e.cz>
To:     Zhang Yi <yi.zhang@...wei.com>
Cc:     linux-ext4@...r.kernel.org, tytso@....edu,
        adilger.kernel@...ger.ca, jack@...e.cz, yukuai3@...wei.com
Subject: Re: [PATCH 1/3] ext4: move inode eio simulation behind io completeion

On Tue 10-08-21 22:27:20, Zhang Yi wrote:
> No EIO simulation is required if the buffer is uptodate, so move the
> simulation behind read bio completeion just like inode/block bitmap
> simulation does.
> 
> Signed-off-by: Zhang Yi <yi.zhang@...wei.com>

Makes sense. Feel free to add:

Reviewed-by: Jan Kara <jack@...e.cz>

								Honza

> ---
>  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 d8de607849df..eb2526a35254 100644
> --- a/fs/ext4/inode.c
> +++ b/fs/ext4/inode.c
> @@ -4330,8 +4330,6 @@ static int __ext4_get_inode_loc(struct super_block *sb, unsigned long ino,
>  	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);
>  
> @@ -4418,8 +4416,8 @@ static int __ext4_get_inode_loc(struct super_block *sb, unsigned long ino,
>  		ext4_read_bh_nowait(bh, REQ_META | REQ_PRIO, NULL);
>  		blk_finish_plug(&plug);
>  		wait_on_buffer(bh);
> +		ext4_simulate_fail_bh(sb, bh, EXT4_SIM_INODE_EIO);
>  		if (!buffer_uptodate(bh)) {
> -		simulate_eio:
>  			if (ret_block)
>  				*ret_block = block;
>  			brelse(bh);
> -- 
> 2.31.1
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR