linux-kernel - Re: 2.6.19.1 bug? tar: file changed as we read it

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Message-ID: <200612181115_MC3-1-D578-937D@compuserve.com>
Date:	Mon, 18 Dec 2006 11:13:01 -0500
From:	Chuck Ebbert <76306.1226@...puserve.com>
To:	Avi Kivity <avi@...o.co.il>
Cc:	Andrew Morton <akpm@...l.org>, Steve French <sfrench@...ba.org>,
	linux-cifs-client <linux-cifs-client@...ts.samba.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.19.1 bug?  tar: file changed as we read it

In-Reply-To: <4586408C.2050408@...o.co.il>

On Mon, 18 Dec 2006 09:17:32 +0200, Ava Kivity wrote:

> In 2.6.20-rc1, some of these files have other files with the same name 
> in the same directory (modulo case).  Perhaps this is confusing cifs.
> 
> Can you check where all of the files in your case share that property?
> 
> example:
> 
>     [avi@...ebolt linux-2.6]$ find net -iname ipt_tos.c
>     net/ipv4/netfilter/ipt_TOS.c
>     net/ipv4/netfilter/ipt_tos.c
> 
>     [avi@...ebolt linux-2.6]$ find net -iname ipt_ecn.c
>     net/ipv4/netfilter/ipt_ECN.c
>     net/ipv4/netfilter/ipt_ecn.c

Yes, that's it.

Using smbfs, both files have the same size and contents even though
they're really different:

$ ll ipt_dscp* ipt_DSCP*
-r--r-----  1 me me 2753 Jan 29  2004 ipt_dscp.c
-r--r-----  1 me me 2753 Jan 29  2004 ipt_DSCP.c
$ ll ipt_dscp.c ipt_DSCP.c
-r--r-----  1 me me 2753 Jan 29  2004 ipt_dscp.c
-r--r-----  1 me me 2753 Jan 29  2004 ipt_DSCP.c

With cifs, a directory search shows different sizes but opening
them by name gives identical contents:

$ ll ipt_dscp* ipt_DSCP*
-r-------- 1 me me 1581 Jan 28  2004 ipt_dscp.c
-r-------- 1 me me 2753 Jan 29  2004 ipt_DSCP.c
$ ll ipt_dscp.c ipt_DSCP.c
-r-------- 1 me me 1581 Jan 28  2004 ipt_dscp.c
-r-------- 1 me me 1581 Jan 28  2004 ipt_DSCP.c
$ diff ipt_dscp.c ipt_DSCP.c
$

So where is the bug? On the server?

-- 
MBTI: IXTP

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