[PATCH v6 net 0/3] ipv6: Fix two GC issues with permanent routes.

[Kuniyuki Iwashima <kuniyu@google.com>]

Patch 1 fixes the unbounded growth of tb6_gc_hlist due to
permanent routes whose exception routes have all expired.

Patch 2 fixes an issue where exception routes tied to
permanent routes are not properly aged.

Patch 3 is a selftest for the issue fixed by Patch 2.


Changes:
  v6:
    Patch 2: Call fib6_age_exceptions() under RCU

  v5: https://lore.kernel.org/netdev/20260319041427.1528743-1-kuniyu@google.com/
    Add selftest

  v4: https://lore.kernel.org/netdev/20260311052954.1224278-1-kuniyu@google.com/
    Patch 2: s/,/;/ for fib6_gc_args initialisation

  v3: https://lore.kernel.org/netdev/20260309180804.3471287-1-kuniyu@google.com/
    Patch 2: Use IS_ENABLED()

  v2: https://lore.kernel.org/netdev/20260308032304.1841198-1-kuniyu@google.com/
    Patch 2: Fix build failure when CONFIG_IPV6=n (no net->ipv6 definition)

  v1: https://lore.kernel.org/netdev/20260307024709.718395-1-kuniyu@google.com/


Kuniyuki Iwashima (3):
  ipv6: Remove permanent routes from tb6_gc_hlist when all exceptions
    expire.
  ipv6: Don't remove permanent routes with exceptions from tb6_gc_hlist.
  selftest: net: Add GC test for temporary routes with exceptions.

 include/net/ip6_fib.h                    | 21 +++++++-
 net/ipv6/addrconf.c                      |  4 +-
 net/ipv6/ip6_fib.c                       | 15 +++++-
 net/ipv6/route.c                         |  2 +-
 tools/testing/selftests/net/fib_tests.sh | 61 ++++++++++++++++++++++--
 5 files changed, 94 insertions(+), 9 deletions(-)

-- 
2.53.0.959.g497ff81fa9-goog