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Date: Thu, 15 Jul 2010 12:24:33 -0400
From: Douglas Gilbert <dgilbert@interlog.com>
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To: Konrad Rzeszutek Wilk <konrad@kernel.org>
CC: "Eric W. Biederman" <ebiederm@xmission.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Greg Kroah-Hartman <gregkh@suse.de>, Greg KH <greg@kroah.com>,
        linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org,
        alsa-devel@alsa-project.org, Jens Axboe <axboe@kernel.dk>,
        Stephen Hemminger <shemminger@vyatta.com>,
        Kay Sievers <kay.sievers@vrfy.org>,
        Alan Stern <stern@rowland.harvard.edu>,
        "James E.J. Bottomley" <James.Bottomley@suse.de>,
        Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
        Randy Dunlap <randy.dunlap@oracle.com>, Tejun Heo <tj@kernel.org>,
        "David S. Miller" <davem@davemloft.net>,
        Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.de>,
        Ingo Molnar <mingo@elte.hu>, Peter Zijlstra <a.p.zijlstra@chello.nl>,
        David Howells <dhowells@redhat.com>, Dave Airlie <airlied@gmail.com>
Subject: Re: [PATCH] driver core: remove CONFIG_SYSFS_DEPRECATED
References: <20100709185450.GA29473@kroah.com> <20100714163852.b3c09930.akpm@linux-foundation.org> <m1zkxtinlw.fsf@fess.ebiederm.org> <201007150929.03916.konrad@kernel.org>
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On 10-07-15 09:29 AM, Konrad Rzeszutek Wilk wrote:
>
>>> and the box still won't boot.
>>
>> The reason FC6 doesn't boot is there is a userspace tool
>> I believe in the initrd that cares about symlinks when it should
>> not.
>
> It is not just nash. Also multipathd would fail (as it expects
> the /sys/scsi_host/..<something>  in certain directories), and 'lsscsi'. There
> might be other tools that depend on libsysfs to be affected by this as well.

lsscsi has been "CONFIG_SYSFS_DEPRECATED_V2" tolerant
since version 0.21 released 20080710. The current
version is 0.23 released 20091201 which will soon
be displaced by 0.24 to cope with the most recent
breakages.

Writing a user space tool that relies on sysfs structure
and contents, stable over the whole lk 2.6 series, is
impossible. For a history of my pain with lsscsi see
its ChangeLog.


Happily most of my tools are based on an ioctl! SG_IO
was a suggestion from Joerg Schilling and has now found
its way into most block devices. Now it has a new lease
of life in the bsg driver.

Doug Gilbert


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