linux-kernel - Re: [Ocfs2-devel] [PATCH 13/39] ocfs2: Add extended attribute support

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Message-ID: <20081008131656.GD25392@lst.de>
Date:	Wed, 8 Oct 2008 15:16:56 +0200
From:	Christoph Hellwig <hch@....de>
To:	Tiger Yang <tiger.yang@...cle.com>
Cc:	Mark Fasheh <mfasheh@...e.com>, Christoph Hellwig <hch@....de>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	ocfs2-devel@....oracle.com
Subject: Re: [Ocfs2-devel] [PATCH 13/39] ocfs2: Add extended attribute support

On Wed, Oct 08, 2008 at 09:56:41AM +0800, Tiger Yang wrote:
> Mark Fasheh wrote:
> >>>+static inline struct xattr_handler *ocfs2_xattr_handler(int name_index)
> >>>+{
> >>>+	struct xattr_handler *handler = NULL;
> >>>+
> >>>+	if (name_index > 0 && name_index < OCFS2_XATTR_MAX)
> >>>+		handler = ocfs2_xattr_handler_map[name_index];
> >>>+
> >>>+	return handler;
> >>>+}
> >>You seem to need the handler mostly for getting back to the prefix
> >>from the handler.  This is a pretty clear indicator that you don't
> >>want to use the xattr_handler splitting but deal with the whole
> >>attr name.  Take a look at the btrfs code after my recent xattr changes
> >>on how to handle this more nicely.
> >
> >Tao, Can you look into this?
> 
> I have looked the patch for btrfs about this. We are different.
> Btrfs store the whole xattr name including the prefix "user." 
> "trusted.", we store index number instead of it.

In which case you shouldn't need to look the handler up anyway.  I'll
re-review the code once you post the next version.

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