linux-kernel - Re: [RFC][PATCH] make reiserfs stop using 'struct file' for internal xattr operations

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Message-Id: <1190928434.7344.31.camel@localhost>
Date:	Thu, 27 Sep 2007 14:27:14 -0700
From:	Dave Hansen <haveblue@...ibm.com>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Laurent Riffard <laurent.riffard@...e.fr>,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	reiserfs-devel@...r.kernel.org
Subject: Re: [RFC][PATCH] make reiserfs stop using 'struct file' for
	internal xattr operations

On Thu, 2007-09-27 at 22:04 +0100, Christoph Hellwig wrote:
> On Thu, Sep 27, 2007 at 01:53:39PM -0700, Dave Hansen wrote:
> > -int reiserfs_commit_write(struct file *f, struct page *page,
> > -			  unsigned from, unsigned to);
> > -int reiserfs_prepare_write(struct file *f, struct page *page,
> > -			   unsigned from, unsigned to);
> > +int reiserfs_commit_write(struct page *page, unsigned from, unsigned to);
> > +int reiserfs_prepare_write(struct page *page, unsigned from, unsigned to);
> 
> I doubt this will work.  These are also used for the ->prepare_write
> and ->commit_write aops, and the method signature definitively wants
> a file there, even if it's zero..

Oddly enough, I don't see those functions being used in aops:

const struct address_space_operations reiserfs_address_space_operations = {
        .writepage = reiserfs_writepage,
        .readpage = reiserfs_readpage,
        .readpages = reiserfs_readpages,
        .releasepage = reiserfs_releasepage,
        .invalidatepage = reiserfs_invalidatepage,
        .sync_page = block_sync_page,
        .write_begin = reiserfs_write_begin,
        .write_end = reiserfs_write_end,
        .bmap = reiserfs_aop_bmap,
        .direct_IO = reiserfs_direct_IO,
        .set_page_dirty = reiserfs_set_page_dirty,
};

Plus, reiserfs seems to compile with that patch I just sent.  Sure as
heck surprised me.

-- Dave

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