diff options
| author | David Ahern <dsahern@gmail.com> | 2018-05-09 20:34:21 -0700 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2018-05-11 00:10:56 +0200 |
| commit | 1d053da910947afccec96d90892c0f5488c7a9cf (patch) | |
| tree | f442067352f034fadf90177ed8f3a605b7a4e596 /net/ipv6/route.c | |
| parent | 3b290a31bbc5969f9193f73d547a6dc8a25c6f9e (diff) | |
net/ipv6: Extract table lookup from ip6_pol_route
ip6_pol_route is used for ingress and egress FIB lookups. Refactor it
moving the table lookup into a separate fib6_table_lookup that can be
invoked separately and export the new function.
ip6_pol_route now calls fib6_table_lookup and uses the result to generate
a dst based rt6_info.
Signed-off-by: David Ahern <dsahern@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'net/ipv6/route.c')
| -rw-r--r-- | net/ipv6/route.c | 39 |
1 files changed, 25 insertions, 14 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 6a10608d9025..019d8ba9021e 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -1800,21 +1800,12 @@ void rt6_age_exceptions(struct fib6_info *rt, rcu_read_unlock_bh(); } -struct rt6_info *ip6_pol_route(struct net *net, struct fib6_table *table, - int oif, struct flowi6 *fl6, - const struct sk_buff *skb, int flags) +/* must be called with rcu lock held */ +struct fib6_info *fib6_table_lookup(struct net *net, struct fib6_table *table, + int oif, struct flowi6 *fl6, int strict) { struct fib6_node *fn, *saved_fn; struct fib6_info *f6i; - struct rt6_info *rt; - int strict = 0; - - strict |= flags & RT6_LOOKUP_F_IFACE; - strict |= flags & RT6_LOOKUP_F_IGNORE_LINKSTATE; - if (net->ipv6.devconf_all->forwarding == 0) - strict |= RT6_LOOKUP_F_REACHABLE; - - rcu_read_lock(); fn = fib6_node_lookup(&table->tb6_root, &fl6->daddr, &fl6->saddr); saved_fn = fn; @@ -1824,8 +1815,6 @@ struct rt6_info *ip6_pol_route(struct net *net, struct fib6_table *table, redo_rt6_select: f6i = rt6_select(net, fn, oif, strict); - if (f6i->fib6_nsiblings) - f6i = fib6_multipath_select(net, f6i, fl6, oif, skb, strict); if (f6i == net->ipv6.fib6_null_entry) { fn = fib6_backtrack(fn, &fl6->saddr); if (fn) @@ -1838,6 +1827,28 @@ redo_rt6_select: } } + return f6i; +} + +struct rt6_info *ip6_pol_route(struct net *net, struct fib6_table *table, + int oif, struct flowi6 *fl6, + const struct sk_buff *skb, int flags) +{ + struct fib6_info *f6i; + struct rt6_info *rt; + int strict = 0; + + strict |= flags & RT6_LOOKUP_F_IFACE; + strict |= flags & RT6_LOOKUP_F_IGNORE_LINKSTATE; + if (net->ipv6.devconf_all->forwarding == 0) + strict |= RT6_LOOKUP_F_REACHABLE; + + rcu_read_lock(); + + f6i = fib6_table_lookup(net, table, oif, fl6, strict); + if (f6i->fib6_nsiblings) + f6i = fib6_multipath_select(net, f6i, fl6, oif, skb, strict); + if (f6i == net->ipv6.fib6_null_entry) { rt = net->ipv6.ip6_null_entry; rcu_read_unlock(); |