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ipv6: Move pcpu cached routes to fib6_nh

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rt6_info are specific instances of a fib entry and are tied to a
device and gateway - ie., a nexthop. Before nexthop objects, IPv6 fib
entries have separate fib6_info for each nexthop in a multipath route,
so the location of the pcpu cache in the fib6_info struct worked.
However, with nexthop objects a fib6_info can point to a set of nexthops
(yet another alignment of ipv6 with ipv4). Accordingly, the pcpu
cache needs to be moved to the fib6_nh struct so the cached entries
are local to the nexthop specification used to create the rt6_info.

Initialization and free of the pcpu entries moved to fib6_nh_init and
fib6_nh_release.

Change in location only, from fib6_info down to fib6_nh; no other
functional change intended.

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 20:27:55 -07:00
committed by David S. Miller
parent daeceb2df3
commit f40b6ae2b6
4 changed files with 38 additions and 34 deletions
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6
net/ipv6/addrconf.c
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@@ -6341,16 +6341,16 @@ void addrconf_disable_policy_idev(struct inet6_dev *idev, int val)
list_for_each_entry(ifa, &idev->addr_list, if_list) {
spin_lock(&ifa->lock);
if (ifa->rt) {
struct fib6_info *rt = ifa->rt;
struct fib6_nh *nh = &ifa->rt->fib6_nh;
int cpu;
rcu_read_lock();
ifa->rt->dst_nopolicy = val ? true : false;
if (rt->rt6i_pcpu) {
if (nh->rt6i_pcpu) {
for_each_possible_cpu(cpu) {
struct rt6_info **rtp;
rtp = per_cpu_ptr(rt->rt6i_pcpu, cpu);
rtp = per_cpu_ptr(nh->rt6i_pcpu, cpu);
addrconf_set_nopolicy(*rtp, val);
}
}