Re: [PATCH net-next v3] net/ipv6: Introduce accept_unsolicited_na knob to implement router-side changes for RFC9131

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On 4/13/22 07:34, Arun Ajith S wrote:
Add a new neighbour cache entry in STALE state for routers on receiving
an unsolicited (gratuitous) neighbour advertisement with
target link-layer-address option specified.
This is similar to the arp_accept configuration for IPv4.
A new sysctl endpoint is created to turn on this behaviour:
/proc/sys/net/ipv6/conf/interface/accept_unsolicited_na.


Do we really need to expose this to /proc/sys, for every interface added in the host ?

/proc files creations/deletion cost a lot in environments adding/deleting netns very often.

I would prefer using NETLINK attributes, a single recvmsg() syscall can fetch/set hundreds of them.






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