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SubjectRe: [PATCH net-next V3] net: Variable SLAAC: SLAAC with prefixes of arbitrary length in PIO
Hi,

2020年11月13日(金) 0:46 Dmytro Shytyi <dmytro@shytyi.net>:
>
> Variable SLAAC: SLAAC with prefixes of arbitrary length in PIO (randomly
> generated hostID or stable privacy + privacy extensions).
> The main problem is that SLAAC RA or PD allocates a /64 by the Wireless
> carrier 4G, 5G to a mobile hotspot, however segmentation of the /64 via
> SLAAC is required so that downstream interfaces can be further subnetted.
> Example: uCPE device (4G + WI-FI enabled) receives /64 via Wireless, and
> assigns /72 to VNF-Firewall, /72 to WIFI, /72 to VNF-Router, /72 to
> Load-Balancer and /72 to wired connected devices.
> IETF document that defines problem statement:
> draft-mishra-v6ops-variable-slaac-problem-stmt
> IETF document that specifies variable slaac:
> draft-mishra-6man-variable-slaac
>
> Signed-off-by: Dmytro Shytyi <dmytro@shytyi.net>
> Reported-by: kernel test robot <lkp@intel.com>
> ---

> - write_lock_bh(&idev->lock);
> + int ret;
> +#if defined(CONFIG_ARCH_SUPPORTS_INT128)
> + __int128 host_id;
> + __int128 net_prfx;
:

No, this does not help anything.
Please do not rely on __int128.

--yoshfuji

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