linux-kernel - Re: [PATCH 9/9] netfilter: implement xt

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Message-ID: <alpine.LSU.2.20.1511212125400.24812@nerf40.vanv.qr>
Date:	Sat, 21 Nov 2015 21:26:25 +0100 (CET)
From:	Jan Engelhardt <jengelh@...i.de>
To:	Florian Westphal <fw@...len.de>
cc:	Tejun Heo <tj@...nel.org>, davem@...emloft.net,
	pablo@...filter.org, kaber@...sh.net, kadlec@...ckhole.kfki.hu,
	daniel@...earbox.net, daniel.wagner@...-carit.de,
	nhorman@...driver.co, lizefan@...wei.com, hannes@...xchg.org,
	netdev@...r.kernel.org, netfilter-devel@...r.kernel.org,
	cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-team@...com, ninasc@...com,
	Neil Horman <nhorman@...driver.com>
Subject: Re: [PATCH 9/9] netfilter: implement xt_cgroup cgroup2 path match


On Saturday 2015-11-21 19:54, Florian Westphal wrote:
>
>The only other question I have is wheter PATH_MAX might be a possible
>ABI breaker in future.  It would have to be guaranteed that this is the
>same size forever, else you'd get strange errors on rule insertion if
>the sizes of the kernel and userspace version differs.
>
The same goes for IFNAMSIZ. But, so far, nobody changed it in the kernel,
even though there are voices that 15 characters + '\0' were a tight choice.
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