linux-kernel - Re: [patch 01/10] vfs: add path_create() and path

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Message-Id: <20080505211251.6c5dec8d.akpm@linux-foundation.org>
Date:	Mon, 5 May 2008 21:12:51 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Miklos Szeredi <miklos@...redi.hu>
Cc:	hch@...radead.org, viro@...iv.linux.org.uk,
	dave@...ux.vnet.ibm.com, ezk@...sunysb.edu, mhalcrow@...ibm.com,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	Dave Hansen <haveblue@...ibm.com>
Subject: Re: [patch 01/10] vfs: add path_create() and path_mknod()

On Mon, 05 May 2008 12:16:22 +0200 Miklos Szeredi <miklos@...redi.hu> wrote:

> R/O bind mounts require operations which modify the filesystem to be
> wrapped in mnt_want_write()/mnt_drop_write().  Create helpers which do
> this, so callers won't need to bother, and more importantly, cannot
> forget!  Call these path_*, analogous to vfs_*.  Since there are no
> callers of vfs_* left, make them static.

ooh, yum.  This appears to address my main complaint about the r-o-bind-mount
stuff: fragility.

> Overall this patchset is just 23 lines in the red, but at the same
> time it fixes several places in nfsd and the whole of ecryptfs, where
> the mnt_want_write/drop_write() calls were missing.

Yeah, like that.
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