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Message-ID: <4B4D5BD5.4090903@trash.net> Date: Wed, 13 Jan 2010 06:36:21 +0100 From: Patrick McHardy <kaber@...sh.net> To: Samir Bellabes <sam@...ack.fr> CC: linux-security-module@...r.kernel.org, jamal <hadi@...erus.ca>, Evgeniy Polyakov <zbr@...emap.net>, Neil Horman <nhorman@...driver.com>, netdev@...r.kernel.org, netfilter-devel@...r.kernel.org Subject: Re: [RFC 7/9] snet: introduce snet_netlink.c and snet_netlink.h Samir Bellabes wrote: > Patrick McHardy <kaber@...sh.net> writes: > >> Samir Bellabes wrote: >>> +++ b/security/snet/include/snet_netlink.h >>> + SNET_A_VERSION, /* (NLA_U32) the snet protocol version */ >> You're using this to check for a "compliant protocol version" below. >> This shouldn't be needed as any protocol changes need to be done >> in a compatible fashion. > > what if userspace lib is using a old protocol version ? kernel and > userspace will use incompatible protocol, which may result in errors. Any protocol changes need to be done in a compatible fashion once this is in the upstream kernel, so that case should never happen. > The idea of this 'version' mecanism is to prevent such > incompatibilities, even if the userspace is (un)volontary not using the > good library (which may be the one tagged in the same time as the kernel > running) -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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