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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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3
include/net/ip6_fib.h
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@@ -131,6 +131,8 @@ struct fib6_nh {
#ifdef CONFIG_IPV6_ROUTER_PREF
unsigned long last_probe;
#endif
struct rt6_info * __percpu *rt6i_pcpu;
};
struct fib6_info {
@@ -156,7 +158,6 @@ struct fib6_info {
struct rt6key fib6_src;
struct rt6key fib6_prefsrc;
struct rt6_info * __percpu *rt6i_pcpu;
struct rt6_exception_bucket __rcu *rt6i_exception_bucket;
u32 fib6_metric;