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Message-ID: <1335486630.2559.3.camel@lade.trondhjem.org> Date: Fri, 27 Apr 2012 00:30:30 +0000 From: "Myklebust, Trond" <Trond.Myklebust@...app.com> To: David Howells <dhowells@...hat.com> CC: 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 On Thu, 2012-04-26 at 22:57 +0100, David Howells wrote: > 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. > th > 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? Does it really matter whether it is the kernel or userland that is responsible for faking up inode numbers? If userland wants to use xstat() in order to fake up a stat() call, then it gets to take responsibility for the results. -- Trond Myklebust Linux NFS client maintainer NetApp Trond.Myklebust@...app.com www.netapp.com
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