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Date: Thu, 09 Aug 2007 20:35:55 -0600 From: ebiederm@...ssion.com (Eric W. Biederman) To: YOSHIFUJI Hideaki / µÈÆ£±ÑÌÀ <yoshfuji@...ux-ipv6.org> Cc: davem@...emloft.net, akpm@...ux-foundation.org, linux-kernel@...r.kernel.org, devel@...nvz.org, adobriyan@...ru, netdev@...r.kernel.org Subject: Re: [PATCH 04/10] sysctl: Fix neighbour table sysctls. YOSHIFUJI Hideaki / µÈÆ£±ÑÌÀ <yoshfuji@...ux-ipv6.org> writes: > In article <m1odhg6sbv.fsf@...ederm.dsl.xmission.com> (at Thu, 09 Aug 2007 > 20:23:16 -0600), ebiederm@...ssion.com (Eric W. Biederman) says: > >> YOSHIFUJI Hideaki / µÈÆ£±ÑÌÀ <yoshfuji@...ux-ipv6.org> writes: >> >> > Would you explain why it does not work properly >> > for those cases? >> >> Mostly no appropriate strategy routine was setup to >> report the data to the caller of sys_sysctl. > > I assume that default strategy have been existing for it, no?! > Maybe, I do miss something... I'd have to go through it case by case. But in general unless your proc_handler is proc_dointvec the default strategy routine which does a raw binary copy of your data out will generally do the wrong thing. So especially if your data is jiffies or otherwise needs processing you don't want to use the default strategy routine. Until relatively recently no one was really policing the sysctl interfaces and even now it isn't too serious. Eric - 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/
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