linux-kernel - Re: recent nfs change causes autofs regression

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20070831081405.GA21499@janus>
Date:	Fri, 31 Aug 2007 10:14:05 +0200
From:	Frank van Maarseveen <frankvm@...nkvm.com>
To:	Hua Zhong <hzhong@...il.com>
Cc:	'Linux Kernel Mailing List' <linux-kernel@...r.kernel.org>,
	'Linus Torvalds' <torvalds@...ux-foundation.org>,
	akpm@...ux-foundation.org
Subject: Re: recent nfs change causes autofs regression

On Thu, Aug 30, 2007 at 02:07:43PM -0700, Hua Zhong wrote:
> I am re-sending this after help from Ian and git-bisect. To me it's a
> show-stopper: I cannot find an acceptable workaround that I can implement.
> 
> The problem: upgrading to 2.6.23-rc4 from 2.6.22 causes several autofs
> mounts to fail silently - they just not appear when they should.
> 
> I believe it's caused by the NFS change that forces multiple mounts from
> different directories under the same server side filesystem to have the same
> mount options by default, otherwise it returns EBUSY.
> 
> For example, if server has a filesystem /a, and it exports /a/x and /a/y
> (maybe with rw or ro), and a client must mount /a/x and /a/y with the same
> mount options now.
> 
> Since in my setup they are managed by autofs, and the autofs map is managed
> by nis, there is no way I could easily workaround it..
> 
> If we have to live with this regression, I want to hear some suggestions
> about how to fix them realistically. Thanks.
> 
> By the way, I am not sure if I did the bisect right, but FWIW, git-bisect
> says:
> 
> c98451bdb2f3e6d6cc1e03adad641e9497512b49 is first bad commit
> commit c98451bdb2f3e6d6cc1e03adad641e9497512b49
> Author: Frank van Maarseveen <frankvm@...nkvm.com>
> Date:   Mon Jul 9 22:25:29 2007 +0200
> 
>     NLM: fix source address of callback to client
> 
>     Use the destination address of the original NLM request as the
>     source address in callbacks to the client.
> 
>     Signed-off-by: Frank van Maarseveen <frankvm@...nkvm.com>
>     Signed-off-by: Trond Myklebust <Trond.Myklebust@...app.com>
> 
> :040000 040000 675c84bd8b2c50744018becaa0db4aeca19b8f9f
> 105fbd3cb3fa5e3019836b4b5268125d0181a72d M      fs
> :040000 040000 0138796e0806b4ebd1cc3850ed4e8c7ab24d2d41
> 2fec08debe51c20423a88b1a0d4281c683ba5daf M      include

This does not have any relation with the mount problem, assuming commit
and comment do match.

-- 
Frank
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/