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ipv6: Pass fib6_result to rt6_device_match 

Pass fib6_result to rt6_device_match with f6i set. rt6_device_match
updates f6i in the result if it finds a better match and sets nh.

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern 2019-04-16 14:36:07 -07:00 committed by David S. Miller
parent b748f26092
commit 75ef7389dd
1 changed files with 31 additions and 20 deletions
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51
net/ipv6/route.c
View File

@ -491,29 +491,40 @@ static bool __rt6_device_match(struct net *net, const struct fib6_nh *nh,
return false;
}
static inline struct fib6_info *rt6_device_match(struct net *net,
struct fib6_info *rt,
const struct in6_addr *saddr,
int oif,
int flags)
static void rt6_device_match(struct net *net, struct fib6_result *res,
const struct in6_addr *saddr, int oif, int flags)
{
const struct fib6_nh *nh;
struct fib6_info *sprt;
struct fib6_info *f6i = res->f6i;
struct fib6_info *spf6i;
struct fib6_nh *nh;
if (!oif && ipv6_addr_any(saddr) &&
!(rt->fib6_nh.fib_nh_flags & RTNH_F_DEAD))
return rt;
for (sprt = rt; sprt; sprt = rcu_dereference(sprt->fib6_next)) {
nh = &sprt->fib6_nh;
if (__rt6_device_match(net, nh, saddr, oif, flags))
return sprt;
if (!oif && ipv6_addr_any(saddr)) {
nh = &f6i->fib6_nh;
if (!(nh->fib_nh_flags & RTNH_F_DEAD)) {
res->nh = nh;
return;
}
}
if (oif && flags & RT6_LOOKUP_F_IFACE)
return net->ipv6.fib6_null_entry;
for (spf6i = f6i; spf6i; spf6i = rcu_dereference(spf6i->fib6_next)) {
nh = &spf6i->fib6_nh;
if (__rt6_device_match(net, nh, saddr, oif, flags)) {
res->f6i = spf6i;
res->nh = nh;
}
}
return rt->fib6_nh.fib_nh_flags & RTNH_F_DEAD ? net->ipv6.fib6_null_entry : rt;
if (oif && flags & RT6_LOOKUP_F_IFACE) {
res->f6i = net->ipv6.fib6_null_entry;
res->nh = &res->f6i->fib6_nh;
return;
}
res->nh = &f6i->fib6_nh;
if (res->nh->fib_nh_flags & RTNH_F_DEAD) {
res->f6i = net->ipv6.fib6_null_entry;
res->nh = &res->f6i->fib6_nh;
}
}
#ifdef CONFIG_IPV6_ROUTER_PREF
@ -1089,8 +1100,8 @@ restart:
if (!res.f6i)
res.f6i = net->ipv6.fib6_null_entry;
else
res.f6i = rt6_device_match(net, res.f6i, &fl6->saddr,
fl6->flowi6_oif, flags);
rt6_device_match(net, &res, &fl6->saddr, fl6->flowi6_oif,
flags);
if (res.f6i == net->ipv6.fib6_null_entry) {
fn = fib6_backtrack(fn, &fl6->saddr);