netdev - Re: [PATCH] IPVS: Fix sysctl warnings about missing strategy

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Message-ID: <m1d4ucz525.fsf@ebiederm.dsl.xmission.com>
Date:	Wed, 14 Nov 2007 18:10:58 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Julian Anastasov <ja@....bg>
Cc:	Simon Horman <horms@...ge.net.au>,
	David Miller <davem@...emloft.net>, borntraeger@...ibm.com,
	netdev@...r.kernel.org, wensong@...ux-vs.org
Subject: Re: [PATCH] IPVS: Fix sysctl warnings about missing strategy

Julian Anastasov <ja@....bg> writes:

> 	I assume /proc/sys is still valid place, only sysctl interface
> is scheduled for removal. 

Yes. The ascii versions of the sysctls that show up in /proc/sys are
definitely still valid.

> So, as long as these entries are not
> accessible from sysctl it is safe to run without strategy handler but if
> values can be changed then we will need strategy handler to
> properly call update_defense_level() as done in proc_do_defense_mode()
> as proc_handler. There could be side effects if new mode is not applied.

Yes.  The current mode of 0644 allows them to be both read and updated
with sys_sysctl.  By removing the ctl_name entry those entries become
inaccessible from the /proc/sys interface.  Which is some easier then
writing a strategy routine.

Eric
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