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Date: Wed, 11 Jun 2008 13:55:25 -0700 From: Vince Busam <vbusam@...gle.com> To: Julius Volz <juliusv@...gle.com> CC: Patrick McHardy <kaber@...sh.net>, lvs-devel@...r.kernel.org, netdev@...r.kernel.org Subject: Re: [PATCH 00/26] IPVS: Add first IPv6 support to IPVS. Julius Volz wrote: > Ah, but the set/get-sockopt calls also pass a size argument, which is > the size of the passed structs. If the kernel and userspace struct > sizes don't match, it is treated as an error. Is this in case > different compilers pad the structs differently, even if the IPVS > version stays the same? So we could disable the size checks of the passed structs, or key on it to determine if the older ABI was used, keeping a list of the structs that had different sizes around, but that sounds like a gross hack which would get worse if any other fields are added. It would also mean new userspace binaries with the new fields wouldn't work with older kernels, is that a problem? Is this better than the alternatives of breaking the ABI, or duplicating code into a separate ABI? Vince -- 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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