diff options
| author | David Ahern <dsahern@gmail.com> | 2019-06-08 14:53:22 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-06-10 10:44:56 -0700 |
| commit | f88c9aa12fd0cff9cbb74b490350e6f0fac68296 (patch) | |
| tree | b532d0092407d1764e4be7e8c58ce6e48946b65d /net/ipv4 | |
| parent | 948622f9840ad8d5c979c3c82505d1ee9e1f8b11 (diff) | |
nexthops: Add ipv6 helper to walk all fib6_nh in a nexthop struct
IPv6 has traditionally had a single fib6_nh per fib6_info. With
nexthops we can have multiple fib6_nh associated with a fib6_info.
Add a nexthop helper to invoke a callback for each fib6_nh in a
'struct nexthop'. If the callback returns non-0, the loop is
stopped and the return value passed to the caller.
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/nexthop.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c index 5e48762b6b5f..49e8adce5b96 100644 --- a/net/ipv4/nexthop.c +++ b/net/ipv4/nexthop.c @@ -517,6 +517,37 @@ struct nexthop *nexthop_select_path(struct nexthop *nh, int hash) } EXPORT_SYMBOL_GPL(nexthop_select_path); +int nexthop_for_each_fib6_nh(struct nexthop *nh, + int (*cb)(struct fib6_nh *nh, void *arg), + void *arg) +{ + struct nh_info *nhi; + int err; + + if (nh->is_group) { + struct nh_group *nhg; + int i; + + nhg = rcu_dereference_rtnl(nh->nh_grp); + for (i = 0; i < nhg->num_nh; i++) { + struct nh_grp_entry *nhge = &nhg->nh_entries[i]; + + nhi = rcu_dereference_rtnl(nhge->nh->nh_info); + err = cb(&nhi->fib6_nh, arg); + if (err) + return err; + } + } else { + nhi = rcu_dereference_rtnl(nh->nh_info); + err = cb(&nhi->fib6_nh, arg); + if (err) + return err; + } + + return 0; +} +EXPORT_SYMBOL_GPL(nexthop_for_each_fib6_nh); + int fib6_check_nexthop(struct nexthop *nh, struct fib6_config *cfg, struct netlink_ext_ack *extack) { |