linux-kernel - Re: no way to swapoff a deleted swap file?

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Message-ID: <20081018204948.GA22140@infradead.org>
Date:	Sat, 18 Oct 2008 16:49:48 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Hugh Dickins <hugh@...itas.com>
Cc:	Willy Tarreau <w@....eu>, Peter Cordes <peter@...des.ca>,
	Bodo Eggert <7eggert@....de>,
	David Newall <davidn@...idnewall.com>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org,
	Christoph Hellwig <hch@...radead.org>,
	linux-mm <linux-mm@...ck.org>
Subject: Re: no way to swapoff a deleted swap file?

On Sat, Oct 18, 2008 at 09:45:14PM +0100, Hugh Dickins wrote:
> --- 2.6.27/fs/namei.c	2008-10-09 23:13:53.000000000 +0100
> +++ linux/fs/namei.c	2008-10-18 21:33:01.000000000 +0100
> @@ -1407,7 +1407,7 @@ static int may_delete(struct inode *dir,
>  	if (IS_APPEND(dir))
>  		return -EPERM;
>  	if (check_sticky(dir, victim->d_inode)||IS_APPEND(victim->d_inode)||
> -	    IS_IMMUTABLE(victim->d_inode))
> +	    IS_IMMUTABLE(victim->d_inode) || IS_SWAPFILE(victim->d_inode))
>  		return -EPERM;
>  	if (isdir) {
>  		if (!S_ISDIR(victim->d_inode->i_mode))

Looks reasonable.
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