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ipv6: Make fib6_nh optional at the end of fib6_info

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Move fib6_nh to the end of fib6_info and make it an array of
size 0. Pass a flag to fib6_info_alloc indicating if the
allocation needs to add space for a fib6_nh.

The current code path always has a fib6_nh allocated with a
fib6_info; with nexthop objects they will be separate.

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 20:27:59 -07:00
committed by David S. Miller
parent cc5c073a69
commit 1cf844c747
7 changed files with 106 additions and 101 deletions
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6
include/net/ip6_fib.h
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@@ -169,8 +169,8 @@ struct fib6_info {
fib6_destroying:1,
unused:3;
struct fib6_nh fib6_nh;
struct rcu_head rcu;
struct fib6_nh fib6_nh[0];
};
struct rt6_info {
@@ -280,7 +280,7 @@ static inline void ip6_rt_put(struct rt6_info *rt)
dst_release(&rt->dst);
}
struct fib6_info *fib6_info_alloc(gfp_t gfp_flags);
struct fib6_info *fib6_info_alloc(gfp_t gfp_flags, bool with_fib6_nh);
void fib6_info_destroy_rcu(struct rcu_head *head);
static inline void fib6_info_hold(struct fib6_info *f6i)
@@ -443,7 +443,7 @@ void rt6_get_prefsrc(const struct rt6_info *rt, struct in6_addr *addr)
static inline struct net_device *fib6_info_nh_dev(const struct fib6_info *f6i)
{
return f6i->fib6_nh.fib_nh_dev;
return f6i->fib6_nh->fib_nh_dev;
}
int fib6_nh_init(struct net *net, struct fib6_nh *fib6_nh,