From 421842edeaf62c4e180b687f5a4efca8c19c49ad Mon Sep 17 00:00:00 2001 From: David Ahern Date: Tue, 17 Apr 2018 17:33:18 -0700 Subject: net/ipv6: Add fib6_null_entry ip6_null_entry will stay a dst based return for lookups that fail to match an entry. Add a new fib6_null_entry which constitutes the root node and leafs for fibs. Replace existing references to ip6_null_entry with the new fib6_null_entry when dealing with FIBs. Signed-off-by: David Ahern Signed-off-by: David S. Miller --- net/ipv6/ip6_fib.c | 26 +++++++++++++------------- 1 file changed, 13 insertions(+), 13 deletions(-) (limited to 'net/ipv6/ip6_fib.c') diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c index f25f4d9831e8..280b69497ad0 100644 --- a/net/ipv6/ip6_fib.c +++ b/net/ipv6/ip6_fib.c @@ -231,7 +231,7 @@ static struct fib6_table *fib6_alloc_table(struct net *net, u32 id) if (table) { table->tb6_id = id; rcu_assign_pointer(table->tb6_root.leaf, - net->ipv6.ip6_null_entry); + net->ipv6.fib6_null_entry); table->tb6_root.fn_flags = RTN_ROOT | RTN_TL_ROOT | RTN_RTINFO; inet_peer_base_init(&table->tb6_peers); } @@ -369,7 +369,7 @@ struct fib6_dump_arg { static void fib6_rt_dump(struct rt6_info *rt, struct fib6_dump_arg *arg) { - if (rt == arg->net->ipv6.ip6_null_entry) + if (rt == arg->net->ipv6.fib6_null_entry) return; call_fib6_entry_notifier(arg->nb, arg->net, FIB_EVENT_ENTRY_ADD, rt); } @@ -658,7 +658,7 @@ static struct fib6_node *fib6_add_1(struct net *net, /* remove null_entry in the root node */ } else if (fn->fn_flags & RTN_TL_ROOT && rcu_access_pointer(fn->leaf) == - net->ipv6.ip6_null_entry) { + net->ipv6.fib6_null_entry) { RCU_INIT_POINTER(fn->leaf, NULL); } @@ -1171,9 +1171,9 @@ int fib6_add(struct fib6_node *root, struct rt6_info *rt, if (!sfn) goto failure; - atomic_inc(&info->nl_net->ipv6.ip6_null_entry->rt6i_ref); + atomic_inc(&info->nl_net->ipv6.fib6_null_entry->rt6i_ref); rcu_assign_pointer(sfn->leaf, - info->nl_net->ipv6.ip6_null_entry); + info->nl_net->ipv6.fib6_null_entry); sfn->fn_flags = RTN_ROOT; /* Now add the first leaf node to new subtree */ @@ -1212,7 +1212,7 @@ int fib6_add(struct fib6_node *root, struct rt6_info *rt, if (fn->fn_flags & RTN_TL_ROOT) { /* put back null_entry for root node */ rcu_assign_pointer(fn->leaf, - info->nl_net->ipv6.ip6_null_entry); + info->nl_net->ipv6.fib6_null_entry); } else { atomic_inc(&rt->rt6i_ref); rcu_assign_pointer(fn->leaf, rt); @@ -1251,7 +1251,7 @@ out: if (!pn_leaf) { WARN_ON(!pn_leaf); pn_leaf = - info->nl_net->ipv6.ip6_null_entry; + info->nl_net->ipv6.fib6_null_entry; } #endif atomic_inc(&pn_leaf->rt6i_ref); @@ -1494,7 +1494,7 @@ static struct rt6_info *fib6_find_prefix(struct net *net, struct fib6_node *child_left, *child_right; if (fn->fn_flags & RTN_ROOT) - return net->ipv6.ip6_null_entry; + return net->ipv6.fib6_null_entry; while (fn) { child_left = rcu_dereference_protected(fn->left, @@ -1531,7 +1531,7 @@ static struct fib6_node *fib6_repair_tree(struct net *net, /* Set fn->leaf to null_entry for root node. */ if (fn->fn_flags & RTN_TL_ROOT) { - rcu_assign_pointer(fn->leaf, net->ipv6.ip6_null_entry); + rcu_assign_pointer(fn->leaf, net->ipv6.fib6_null_entry); return fn; } @@ -1576,7 +1576,7 @@ static struct fib6_node *fib6_repair_tree(struct net *net, #if RT6_DEBUG >= 2 if (!new_fn_leaf) { WARN_ON(!new_fn_leaf); - new_fn_leaf = net->ipv6.ip6_null_entry; + new_fn_leaf = net->ipv6.fib6_null_entry; } #endif atomic_inc(&new_fn_leaf->rt6i_ref); @@ -1726,7 +1726,7 @@ int fib6_del(struct rt6_info *rt, struct nl_info *info) return -ENOENT; } #endif - if (!fn || rt == net->ipv6.ip6_null_entry) + if (!fn || rt == net->ipv6.fib6_null_entry) return -ENOENT; WARN_ON(!(fn->fn_flags & RTN_RTINFO)); @@ -2087,7 +2087,7 @@ static int __net_init fib6_net_init(struct net *net) net->ipv6.fib6_main_tbl->tb6_id = RT6_TABLE_MAIN; rcu_assign_pointer(net->ipv6.fib6_main_tbl->tb6_root.leaf, - net->ipv6.ip6_null_entry); + net->ipv6.fib6_null_entry); net->ipv6.fib6_main_tbl->tb6_root.fn_flags = RTN_ROOT | RTN_TL_ROOT | RTN_RTINFO; inet_peer_base_init(&net->ipv6.fib6_main_tbl->tb6_peers); @@ -2099,7 +2099,7 @@ static int __net_init fib6_net_init(struct net *net) goto out_fib6_main_tbl; net->ipv6.fib6_local_tbl->tb6_id = RT6_TABLE_LOCAL; rcu_assign_pointer(net->ipv6.fib6_local_tbl->tb6_root.leaf, - net->ipv6.ip6_null_entry); + net->ipv6.fib6_null_entry); net->ipv6.fib6_local_tbl->tb6_root.fn_flags = RTN_ROOT | RTN_TL_ROOT | RTN_RTINFO; inet_peer_base_init(&net->ipv6.fib6_local_tbl->tb6_peers); -- cgit v1.2.3