linux-kernel - Re: vfs-scale, d_revalidate from nfsd

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Message-ID: <20110114032224.GW19804@ZenIV.linux.org.uk>
Date:	Fri, 14 Jan 2011 03:22:24 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Nick Piggin <npiggin@...il.com>
Cc:	"J. R. Okajima" <hooanon05@...oo.co.jp>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	linux-kernel@...r.kernel.org
Subject: Re: vfs-scale, d_revalidate from nfsd

> BTW, why on the earth do you have that:
> static int xattr_hide_revalidate(struct dentry *dentry, struct nameidata *nd)
> {
>         if (nd->flags & LOOKUP_RCU)
>                 return -ECHILD;
>         return -EPERM;
> }
> when the sole intent of that sucker is to have dentry of /.xattr (pinned
> in dcache and hashed all along) rejected on lookups from root?  IOW, WTF
> bother with -ECHILD here at all?

PS: that's fs/reiserfs/xattr.c
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