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Re: [patch i2o 5/6] i2o_proc files permission [message #12960 is a reply to message #12955]

Wed, 16 May 2007 04:58

vaverin
Messages: 708
Registered: September 2005

Senior Member

Alan Cox wrote:
> On Tue, 15 May 2007 16:47:05 +0400
> Vasily Averin <vvs@sw.ru> wrote:
>
>> Reading from some i2o related proc files can lead to the i2o controller hang due
>> unknown reasons. As a workaround this patch changes the permission of these
>> files to root-only accessible.
>
> I guess you have a crap controller in this case.
>
> This isn't the right fix: Detect your specific buggy control and do not
> register the problem /proc nodes for it at all.

Alan,

We have i2o on one of our testnodes: Adaptec Zero channel RAID 2010S integrated
on MSI MS-9136 motherboard and I don't have access to another i2o hardware.
Also I don't have any ideas how to detect buggy i2o node. As far as I understand
Markus is right, and i2o hardware couldn't handle received message that on the
first glance looks correctly.
>From my POV it is bug in firmware and only vendor is able to fix it correctly.
My patch is not a fix but workaround only -- it just do not allow to crash the
node by any user in case when node admin due some reasons has loaded i2o_proc
module.

Thank you,
Vasily Averin

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[Message index]

		[patch i2o] i2o layer cleanup By: vaverin on Tue, 15 May 2007 12:41
		[patch i2o 1/6] i2o_cfg_passthru cleanup By: vaverin on Tue, 15 May 2007 12:42
		Re: [patch i2o 1/6] i2o_cfg_passthru cleanup By: Alan Cox on Tue, 15 May 2007 16:42
		[patch i2o 2/6] wrong memory access in i2o_block_device_lock() By: vaverin on Tue, 15 May 2007 12:43
		[patch i2o 3/6] i2o message leak in i2o_msg_post_wait_mem() By: vaverin on Tue, 15 May 2007 12:44
		[patch i2o 4/6] i2o proc reading oops By: vaverin on Tue, 15 May 2007 12:45
		[patch i2o 5/6] i2o_proc files permission By: vaverin on Tue, 15 May 2007 12:47
		Re: [patch i2o 5/6] i2o_proc files permission By: vaverin on Tue, 15 May 2007 12:59
		Re: [patch i2o 5/6] i2o_proc files permission By: Greg KH on Wed, 16 May 2007 09:27
		Re: [patch i2o 5/6] i2o_proc files permission By: Alan Cox on Tue, 15 May 2007 16:45
		Re: [patch i2o 5/6] i2o_proc files permission By: vaverin on Wed, 16 May 2007 04:58
		Re: [patch i2o 5/6] i2o_proc files permission By: Alan Cox on Wed, 16 May 2007 12:49
		[patch i2o 6/6] i2o debug output cleanup By: vaverin on Tue, 15 May 2007 12:48
		Re: [patch i2o 6/6] i2o debug output cleanup By: Alan Cox on Tue, 15 May 2007 16:46
		Re: [patch i2o] i2o layer cleanup By: Kirill Korotaev on Tue, 15 May 2007 12:53

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