From: David Howells <dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: Dave Chinner <david-FqsqvQoI3Ljby3iVrkZq2A@public.gmane.org>
Cc: dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
adilger-m1MBpc4rdrD3fQ9qLvQP4Q@public.gmane.org,
bfields-uC3wQj2KruNg9hUCZPvPmw@public.gmane.org,
smfrench-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
ben-/+tVBieCtBitmTQ+vhA3Yw@public.gmane.org,
Trond.Myklebust-HgOvQuBEEgTQT0dZR+AlfA@public.gmane.org,
roland-/Z5OmTQCD9xF6kxbq+BtvQ@public.gmane.org,
jra-eUNUBHrolfbYtjvyW6yDsg@public.gmane.org,
bernd.schubert-mPn0NPGs4xGatNDF+KUbs4QuADTiUCJX@public.gmane.org,
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linux-cifs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
samba-technical-w/Ol4Ecudpl8XjKLYN78aQ@public.gmane.org,
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libc-alpha-9JcytcrH/bA+uJoB2kUjGw@public.gmane.org
Subject: Re: Extended file stat: Splitting file- and fs-specific info?
Date: Wed, 09 May 2012 10:21:14 +0100 [thread overview]
Message-ID: <20170.1336555274@redhat.com> (raw)
In-Reply-To: <20120509002420.GL5091@dastard>
Dave Chinner <david-FqsqvQoI3Ljby3iVrkZq2A@public.gmane.org> wrote:
> I don't think we want to expose the inode generation numbers. It is
> trivial to construct NFS file handles (usually just fsid, inode
> number and generation) with that information and hence bypass
> security checks to access files.
I was asked for it by Bernd Schubert for userspace NFS servers and FUSE -
maybe he can say what he wants it for.
I also have a note that Jeremy Allison asked for it, but I can't find where or
why, so that might be an error.
It looks like FreeBSD do have an st_gen field in their stat struct, but it's
only filled in for root. Maybe I could do something like that?
David
WARNING: multiple messages have this Message-ID (diff)
From: David Howells <dhowells@redhat.com>
To: Dave Chinner <david@fromorbit.com>
Cc: dhowells@redhat.com, adilger@dilger.ca, bfields@fieldses.org,
smfrench@gmail.com, ben@decadent.org.uk,
Trond.Myklebust@netapp.com, roland@hack.frob.com, jra@samba.org,
bernd.schubert@itwm.fraunhofer.de, linux-fsdevel@vger.kernel.org,
linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org,
samba-technical@lists.samba.org, linux-ext4@vger.kernel.org,
linux-api@vger.kernel.org, libc-alpha@sourceware.org
Subject: Re: Extended file stat: Splitting file- and fs-specific info?
Date: Wed, 09 May 2012 10:21:14 +0100 [thread overview]
Message-ID: <20170.1336555274@redhat.com> (raw)
In-Reply-To: <20120509002420.GL5091@dastard>
Dave Chinner <david@fromorbit.com> wrote:
> I don't think we want to expose the inode generation numbers. It is
> trivial to construct NFS file handles (usually just fsid, inode
> number and generation) with that information and hence bypass
> security checks to access files.
I was asked for it by Bernd Schubert for userspace NFS servers and FUSE -
maybe he can say what he wants it for.
I also have a note that Jeremy Allison asked for it, but I can't find where or
why, so that might be an error.
It looks like FreeBSD do have an st_gen field in their stat struct, but it's
only filled in for root. Maybe I could do something like that?
David
next prev parent reply other threads:[~2012-05-09 9:21 UTC|newest]
Thread overview: 144+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-19 14:05 [PATCH 0/6] Extended file stat system call David Howells
2012-04-19 14:05 ` David Howells
2012-04-19 14:06 ` [PATCH 3/6] xstat: AFS: Return extended attributes David Howells
2012-04-19 14:06 ` [PATCH 4/6] xstat: NFS: " David Howells
[not found] ` <20120419140653.17272.95035.stgit-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2012-04-19 14:35 ` Myklebust, Trond
2012-04-19 14:35 ` Myklebust, Trond
2012-04-26 13:52 ` David Howells
2012-04-19 14:07 ` [PATCH 5/6] xstat: CIFS: " David Howells
[not found] ` <20120419140706.17272.72290.stgit-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2012-04-19 15:19 ` Steve French
2012-04-19 15:19 ` Steve French
2012-04-19 16:32 ` [PATCH 0/6] Extended file stat system call Roland McGrath
2012-04-19 21:51 ` Paul Eggert
2012-04-19 23:05 ` Roland McGrath
2012-04-26 14:16 ` David Howells
[not found] ` <20173.1335449760-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-26 18:22 ` Roland McGrath
2012-04-26 18:22 ` Roland McGrath
2012-04-26 13:54 ` David Howells
[not found] ` <19184.1335448455-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-26 18:25 ` Roland McGrath
2012-04-26 18:25 ` Roland McGrath
2012-04-27 23:54 ` Paul Eggert
[not found] ` <20120426182524.E5ADF2C0EC-j1d2VQoJOwwHfwO+Tb3JRVaTQe2KTcn/@public.gmane.org>
2012-04-26 21:54 ` David Howells
2012-04-26 21:54 ` David Howells
[not found] ` <9931.1335477281-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-26 22:02 ` Roland McGrath
2012-04-26 22:02 ` Roland McGrath
2012-04-26 22:21 ` Nix
[not found] ` <4F9088D6.9020203-764C0pRuGfqVc3sceRu5cw@public.gmane.org>
2012-04-26 14:04 ` David Howells
2012-04-26 14:04 ` David Howells
[not found] ` <19638.1335449047-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-26 18:24 ` Roland McGrath
2012-04-26 18:24 ` Roland McGrath
[not found] ` <20120419140558.17272.74360.stgit-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2012-04-19 14:06 ` [PATCH 1/6] xstat: Add a pair of system calls to make extended file stats available David Howells
2012-04-19 14:06 ` David Howells
2012-04-19 23:36 ` Andreas Dilger
2012-04-26 13:32 ` David Howells
[not found] ` <18195.1335447156-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-27 0:51 ` Dave Chinner
2012-04-27 0:51 ` Dave Chinner
2012-04-27 3:11 ` Andreas Dilger
2012-04-27 3:11 ` Andreas Dilger
[not found] ` <20120419140612.17272.57774.stgit-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2012-04-24 21:29 ` J. Bruce Fields
2012-04-24 21:29 ` J. Bruce Fields
[not found] ` <20120424212911.GA26073-uC3wQj2KruNg9hUCZPvPmw@public.gmane.org>
2012-04-24 22:08 ` Steve French
2012-04-24 22:08 ` Steve French
2012-04-26 13:45 ` David Howells
[not found] ` <18765.1335447954-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-26 14:28 ` J. Bruce Fields
2012-04-26 14:28 ` J. Bruce Fields
2012-04-26 17:06 ` Steve French
2012-04-26 17:06 ` Steve French
2012-04-25 14:44 ` Andreas Dilger
2012-04-25 14:44 ` Andreas Dilger
2012-04-26 13:40 ` David Howells
[not found] ` <18533.1335447617-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-26 14:23 ` J. Bruce Fields
2012-04-26 14:23 ` J. Bruce Fields
2012-04-30 16:27 ` Ben Hutchings
2012-04-30 20:15 ` David Howells
2012-04-30 20:30 ` J. Bruce Fields
2012-04-30 23:31 ` Ben Hutchings
2012-04-19 14:06 ` [PATCH 2/6] xstat: Ext4: Return extended attributes David Howells
2012-04-19 14:06 ` David Howells
[not found] ` <20120419140625.17272.23303.stgit-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2012-04-19 16:03 ` Steve French
2012-04-19 16:03 ` Steve French
2012-04-26 13:47 ` David Howells
2012-04-26 17:00 ` Steve French
2012-04-26 17:00 ` Steve French
2012-04-19 14:07 ` [PATCH 6/6] xstat: eCryptFS: " David Howells
2012-04-19 14:07 ` David Howells
2012-04-19 17:11 ` [PATCH 0/6] Extended file stat system call Steve French
2012-04-19 17:11 ` Steve French
2012-04-26 14:25 ` David Howells
2012-04-26 14:54 ` Steve French
[not found] ` <CAH2r5mv1Lijdwk5zsQwYJr4Etb6fhrRyNXm-iFCQX+HecboGrQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-04-26 15:25 ` Myklebust, Trond
2012-04-26 15:25 ` Myklebust, Trond
2012-04-26 16:56 ` Steve French
2012-04-26 16:56 ` Steve French
[not found] ` <CAH2r5mt5af-_hxBRKK72iD5Gr99bo91ec78Rov8EGVEx8=21mA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-04-26 17:00 ` Myklebust, Trond
2012-04-26 17:00 ` Myklebust, Trond
2012-04-26 17:03 ` Steve French
2012-04-26 17:03 ` Steve French
[not found] ` <CAH2r5mvmCfLrxRHje6Wx5X84zxPEHwRMUJGsjvWBujMu7w841w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-04-26 17:06 ` Myklebust, Trond
2012-04-26 17:06 ` Myklebust, Trond
[not found] ` <1335460011.9701.30.camel-SyLVLa/KEI9HwK5hSS5vWB2eb7JE58TQ@public.gmane.org>
2012-04-26 17:09 ` Steve French
2012-04-26 17:09 ` Steve French
[not found] ` <CAH2r5muXk+frkFz9X523Ny=RMwJGeqOPH75G1ToNa5QoMo5SkQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-04-26 17:10 ` Steve French
2012-04-26 17:10 ` Steve French
2012-04-26 21:57 ` David Howells
2012-04-26 21:57 ` David Howells
[not found] ` <10104.1335477476-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-26 22:05 ` Roland McGrath
2012-04-26 22:05 ` Roland McGrath
[not found] ` <20120426220552.D98D62C0D3-j1d2VQoJOwwHfwO+Tb3JRVaTQe2KTcn/@public.gmane.org>
2012-04-27 0:33 ` Myklebust, Trond
2012-04-27 0:33 ` Myklebust, Trond
2012-04-27 0:30 ` Myklebust, Trond
2012-04-27 0:30 ` Myklebust, Trond
2012-04-26 15:52 ` David Howells
2012-04-27 0:29 ` Andreas Dilger
2012-04-27 0:29 ` Andreas Dilger
[not found] ` <3F302713-B675-4BAA-B2B7-235E03C5975F-m1MBpc4rdrD3fQ9qLvQP4Q@public.gmane.org>
2012-04-27 9:19 ` David Howells
2012-04-27 9:19 ` David Howells
2012-04-27 1:06 ` Dave Chinner
2012-04-27 1:06 ` Dave Chinner
2012-04-27 3:22 ` Andreas Dilger
[not found] ` <ED5B8F1B-6C99-4516-85FA-A767E94B635F-m1MBpc4rdrD3fQ9qLvQP4Q@public.gmane.org>
2012-04-28 0:38 ` Dave Chinner
2012-04-28 0:38 ` Dave Chinner
2012-04-28 0:54 ` Steve French
2012-04-27 9:39 ` David Howells
[not found] ` <4111.1335519545-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-27 13:13 ` Dave Chinner
2012-04-27 13:13 ` Dave Chinner
2012-04-27 15:10 ` J. Bruce Fields
[not found] ` <20120427151057.GA16580-uC3wQj2KruNg9hUCZPvPmw@public.gmane.org>
2012-04-27 16:32 ` Steve French
2012-04-27 16:32 ` Steve French
2012-04-27 19:31 ` Andreas Dilger
2012-04-28 0:58 ` Dave Chinner
2012-05-10 9:51 ` David Howells
2012-05-08 20:19 ` Extended file stat: Splitting file- and fs-specific info? David Howells
2012-05-08 20:19 ` David Howells
2012-05-08 21:13 ` Myklebust, Trond
2012-05-08 21:13 ` Myklebust, Trond
[not found] ` <16281.1336508382-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-05-09 0:24 ` Dave Chinner
2012-05-09 0:24 ` Dave Chinner
2012-05-09 1:09 ` J. Bruce Fields
2012-05-09 1:09 ` J. Bruce Fields
2012-05-09 4:25 ` Dave Chinner
2012-05-09 11:14 ` J. Bruce Fields
2012-05-09 11:14 ` J. Bruce Fields
2012-05-09 1:16 ` Andreas Dilger
2012-05-09 1:16 ` Andreas Dilger
2012-05-10 9:23 ` David Howells
[not found] ` <14477.1336641794-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-05-10 16:05 ` Andreas Dilger
2012-05-10 16:05 ` Andreas Dilger
2012-05-10 17:10 ` Roland McGrath
2012-05-10 17:10 ` Roland McGrath
2012-05-11 8:54 ` Andreas Dilger
2012-05-09 9:21 ` David Howells [this message]
2012-05-09 9:21 ` David Howells
[not found] ` <20170.1336555274-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-05-09 11:19 ` Christoph Hellwig
2012-05-09 11:19 ` Christoph Hellwig
[not found] ` <20120509111958.GA11345-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2012-05-09 11:55 ` Bernd Schubert
2012-05-09 11:55 ` Bernd Schubert
[not found] ` <4FAA5B24.1020306-mPn0NPGs4xGatNDF+KUbs4QuADTiUCJX@public.gmane.org>
2012-05-09 12:05 ` Christoph Hellwig
2012-05-09 12:05 ` Christoph Hellwig
[not found] ` <20120509120544.GA17535-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2012-05-09 12:25 ` Bernd Schubert
2012-05-09 12:25 ` Bernd Schubert
2012-05-09 13:51 ` Andreas Dilger
2012-05-09 14:12 ` Bernd Schubert
2012-05-10 9:14 ` David Howells
2012-05-10 9:14 ` David Howells
2012-04-19 23:29 ` [PATCH 0/6] Extended file stat system call Andreas Dilger
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