linux-kernel - Re: [PATCH] fs: Don't ignore MS_RDONLY in bind and not remount case.

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Message-ID: <20091030055337.GA3406@infradead.org>
Date:	Fri, 30 Oct 2009 01:53:37 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Kusanagi Kouichi <slash@...auone-net.jp>
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fs: Don't ignore MS_RDONLY in bind and not remount
	case.

On Fri, Oct 30, 2009 at 02:31:46PM +0900, Kusanagi Kouichi wrote:
> A readonly bind mount needed to be created in 2 steps
> 
> # mount --bind
> # mount --bind -o remount,ro
> 
> instead of single
> 
> # mount --bind -o ro
> 
> because MS_RDONLY is ignored in bind and not remount case.

I'm pretty sure that was intentional, but I don't remember why anymore.

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