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From: Liu Bo <bo.li.liu@oracle.com>
To: josef@toxicpanda.com
Cc: linux-btrfs@vger.kernel.org, kernel-team@fb.com,
	Josef Bacik <jbacik@fb.com>
Subject: Re: [PATCH 2/2] btrfs: increase ctx->pos for delayed dir index
Date: Fri, 28 Jul 2017 11:33:46 -0600	[thread overview]
Message-ID: <20170728173346.GB15815@localhost.localdomain> (raw)
In-Reply-To: <1500923666-29670-2-git-send-email-jbacik@fb.com>

On Mon, Jul 24, 2017 at 03:14:26PM -0400, josef@toxicpanda.com wrote:
> From: Josef Bacik <jbacik@fb.com>
> 
> Our dir_context->pos is supposed to hold the next position we're
> supposed to look.  If we successfully insert a delayed dir index we
> could end up with a duplicate entry because we don't increase ctx->pos
> after doing the dir_emit.
>

Looks good.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>

Thanks,

-liubo
> Signed-off-by: Josef Bacik <jbacik@fb.com>
> ---
>  fs/btrfs/delayed-inode.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/fs/btrfs/delayed-inode.c b/fs/btrfs/delayed-inode.c
> index 8ae409b..19e4ad2 100644
> --- a/fs/btrfs/delayed-inode.c
> +++ b/fs/btrfs/delayed-inode.c
> @@ -1727,6 +1727,7 @@ int btrfs_readdir_delayed_dir_index(struct dir_context *ctx,
>  
>  		if (over)
>  			return 1;
> +		ctx->pos++;
>  	}
>  	return 0;
>  }
> -- 
> 2.7.4
> 
> --
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  reply	other threads:[~2017-07-28 18:35 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-07-24 19:14 [PATCH 1/2][v2] btrfs: fix readdir deadlock with pagefault josef
2017-07-24 19:14 ` [PATCH 2/2] btrfs: increase ctx->pos for delayed dir index josef
2017-07-28 17:33   ` Liu Bo [this message]
2017-07-28 15:27 ` [PATCH 1/2][v2] btrfs: fix readdir deadlock with pagefault David Sterba
2017-07-28 17:33 ` Liu Bo
  -- strict thread matches above, loose matches on Subject: below --
2017-08-01 19:50 [PATCH 1/2][v3] " josef
2017-08-01 19:51 ` [PATCH 2/2] btrfs: increase ctx->pos for delayed dir index josef

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