ipv6: anycast: complete RCU handling of struct ifacaddr6

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struct ifacaddr6 are already freed after RCU grace period.

Add __rcu qualifier to aca_next pointer, and idev->ac_list

Add relevant rcu_assign_pointer() and dereference accessors.

ipv6_chk_acast_dev() no longer needs to acquire idev->lock.

/proc/net/anycast6 is now purely RCU protected, it no
longer acquires idev->lock.

Similarly in6_dump_addrs() can use RCU protection to iterate
through anycast addresses. It was relying on a mixture of RCU
and RTNL but next patches will get rid of RTNL there.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20240223201054.220534-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Eric Dumazet 2024-02-23 20:10:54 +00:00 • committed by Jakub Kicinski

parent 5c237967e6

commit c3718936ec

3 changed files with 27 additions and 42 deletions

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4

include/net/if_inet6.h

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4

net/ipv6/addrconf.c

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61

net/ipv6/anycast.c

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