linux-ext4 - Re: [PATCH 0/6] Extended file stat system call

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Message-ID: <10104.1335477476@redhat.com>
Date:	Thu, 26 Apr 2012 22:57:56 +0100
From:	David Howells <dhowells@...hat.com>
To:	"Myklebust, Trond" <Trond.Myklebust@...app.com>
Cc:	dhowells@...hat.com, Steve French <smfrench@...il.com>,
	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	"linux-nfs@...r.kernel.org" <linux-nfs@...r.kernel.org>,
	"linux-cifs@...r.kernel.org" <linux-cifs@...r.kernel.org>,
	"samba-technical@...ts.samba.org" <samba-technical@...ts.samba.org>,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
	"wine-devel@...ehq.org" <wine-devel@...ehq.org>,
	"kfm-devel@....org" <kfm-devel@....org>,
	"nautilus-list@...me.org" <nautilus-list@...me.org>,
	"linux-api@...r.kernel.org" <linux-api@...r.kernel.org>,
	"libc-alpha@...rceware.org" <libc-alpha@...rceware.org>
Subject: Re: [PATCH 0/6] Extended file stat system call

Myklebust, Trond <Trond.Myklebust@...app.com> wrote:

> You are still not explaining why they need to know the values at all? If
> the values are bogus, then don't return them, and don't set the flag
> that says they are being returned.

What if the xstat() and struct xstat eventually becomes what userspace uses as
stat() (as a wrapper) and struct stat (if such a thing is possible with glibc
versioning)?  Do older programs that think they're using stat() and don't know
about the extra fields available expect to see a useful value in st_ino?

David
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