diff options
Diffstat (limited to 'net/ipv4/route.c')
| -rw-r--r-- | net/ipv4/route.c | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 68cee358d9a3..dd57f4896736 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1857,6 +1857,28 @@ static unsigned int ipv4_default_mtu(const struct dst_entry *dst) return mtu; } +static void rt_init_metrics(struct rtable *rt, struct fib_info *fi) +{ + if (!(rt->fl.flags & FLOWI_FLAG_PRECOW_METRICS)) { + no_cow: + rt->fi = fi; + atomic_inc(&fi->fib_clntref); + dst_init_metrics(&rt->dst, fi->fib_metrics, true); + } else { + struct inet_peer *peer; + + if (!rt->peer) + rt_bind_peer(rt, 1); + peer = rt->peer; + if (!peer) + goto no_cow; + if (inet_metrics_new(peer)) + memcpy(peer->metrics, fi->fib_metrics, + sizeof(u32) * RTAX_MAX); + dst_init_metrics(&rt->dst, peer->metrics, false); + } +} + static void rt_set_nexthop(struct rtable *rt, struct fib_result *res, u32 itag) { struct dst_entry *dst = &rt->dst; @@ -1866,9 +1888,7 @@ static void rt_set_nexthop(struct rtable *rt, struct fib_result *res, u32 itag) if (FIB_RES_GW(*res) && FIB_RES_NH(*res).nh_scope == RT_SCOPE_LINK) rt->rt_gateway = FIB_RES_GW(*res); - rt->fi = fi; - atomic_inc(&fi->fib_clntref); - dst_init_metrics(dst, fi->fib_metrics, true); + rt_init_metrics(rt, fi); #ifdef CONFIG_IP_ROUTE_CLASSID dst->tclassid = FIB_RES_NH(*res).nh_tclassid; #endif |