Commit dec9b0e2 authored by David Ahern's avatar David Ahern Committed by David S. Miller
Browse files

net/ipv6: Add rt6_info create function for ip6_pol_route_lookup 



ip6_pol_route_lookup is the lookup function for ip6_route_lookup and
rt6_lookup. At the moment it returns either a reference to a FIB entry
or a cached exception. To move FIB entries to a separate struct, this
lookup function needs to convert FIB entries to an rt6_info that is
returned to the caller.

Signed-off-by: default avatarDavid Ahern <dsahern@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 421842ed

net/ipv6/route.c

+25 −4
Original line number Diff line number Diff line
@@ -1055,6 +1055,19 @@ static bool ip6_hold_safe(struct net *net, struct rt6_info **prt, 
	return false;

}



/* called with rcu_lock held */

static struct rt6_info *ip6_create_rt_rcu(struct rt6_info *rt)

{

	struct net_device *dev = rt->fib6_nh.nh_dev;

	struct rt6_info *nrt;



	nrt = __ip6_dst_alloc(dev_net(dev), dev, 0);

	if (nrt)

		ip6_rt_copy_init(nrt, rt);



	return nrt;

}



static struct rt6_info *ip6_pol_route_lookup(struct net *net,

					     struct fib6_table *table,

					     struct flowi6 *fl6,
@@ -1087,18 +1100,26 @@ restart: 
	}

	/* Search through exception table */

	rt_cache = rt6_find_cached_rt(rt, &fl6->daddr, &fl6->saddr);

	if (rt_cache)

	if (rt_cache) {

		rt = rt_cache;



		if (ip6_hold_safe(net, &rt, true))

			dst_use_noref(&rt->dst, jiffies);

	} else if (dst_hold_safe(&rt->dst)) {

		struct rt6_info *nrt;



		nrt = ip6_create_rt_rcu(rt);

		dst_release(&rt->dst);

		rt = nrt;

	} else {

		rt = net->ipv6.ip6_null_entry;

		dst_hold(&rt->dst);

	}



	rcu_read_unlock();



	trace_fib6_table_lookup(net, rt, table, fl6);



	return rt;



}



struct dst_entry *ip6_route_lookup(struct net *net, struct flowi6 *fl6,

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