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ipv6: Refactor ip6_route_del for cached routes 

Move the removal of cached routes to a helper, ip6_del_cached_rt, that
can be invoked per nexthop. Rename the existig ip6_del_cached_rt to
__ip6_del_cached_rt since it is called by ip6_del_cached_rt.

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern 2019-05-22 20:28:00 -07:00 committed by David S. Miller
parent 1cf844c747
commit 0fa6efc547
1 changed files with 21 additions and 15 deletions
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36
net/ipv6/route.c
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@ -3430,7 +3430,7 @@ out_put:
return err;
}
static int ip6_del_cached_rt(struct rt6_info *rt, struct fib6_config *cfg)
static int __ip6_del_cached_rt(struct rt6_info *rt, struct fib6_config *cfg)
{
int rc = -ESRCH;
@ -3446,10 +3446,25 @@ out:
return rc;
}
static int ip6_del_cached_rt(struct fib6_config *cfg, struct fib6_info *rt,
struct fib6_nh *nh)
{
struct fib6_result res = {
.f6i = rt,
.nh = nh,
};
struct rt6_info *rt_cache;
rt_cache = rt6_find_cached_rt(&res, &cfg->fc_dst, &cfg->fc_src);
if (rt_cache)
return __ip6_del_cached_rt(rt_cache, cfg);
return 0;
}
static int ip6_route_del(struct fib6_config *cfg,
struct netlink_ext_ack *extack)
{
struct rt6_info *rt_cache;
struct fib6_table *table;
struct fib6_info *rt;
struct fib6_node *fn;
@ -3474,21 +3489,12 @@ static int ip6_route_del(struct fib6_config *cfg,
nh = rt->fib6_nh;
if (cfg->fc_flags & RTF_CACHE) {
struct fib6_result res = {
.f6i = rt,
.nh = nh,
};
int rc;
rt_cache = rt6_find_cached_rt(&res,
&cfg->fc_dst,
&cfg->fc_src);
if (rt_cache) {
rc = ip6_del_cached_rt(rt_cache, cfg);
if (rc != -ESRCH) {
rcu_read_unlock();
return rc;
}
rc = ip6_del_cached_rt(cfg, rt, nh);
if (rc != -ESRCH) {
rcu_read_unlock();
return rc;
}
continue;
}