netns: rename peernet2id() to peernet2id_alloc()

In a following commit, a new function will be introduced to only lookup for
a nsid (no allocation if the nsid doesn't exist). To avoid confusion, the
existing function is renamed.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/vxlan.c

@@ -336,7 +336,7 @@ static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan,
 
 	if (!net_eq(dev_net(vxlan->dev), vxlan->net) &&
 	    nla_put_s32(skb, NDA_LINK_NETNSID,
-			peernet2id(dev_net(vxlan->dev), vxlan->net)))
+			peernet2id_alloc(dev_net(vxlan->dev), vxlan->net)))
 		goto nla_put_failure;
 
 	if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr))

include/net/net_namespace.h

@@ -271,7 +271,7 @@ static inline struct net *read_pnet(const possible_net_t *pnet)
 #define __net_initconst	__initconst
 #endif
 
-int peernet2id(struct net *net, struct net *peer);
+int peernet2id_alloc(struct net *net, struct net *peer);
 struct net *get_net_ns_by_id(struct net *net, int id);
 
 struct pernet_operations {

net/core/net_namespace.c

@@ -202,13 +202,13 @@ static int __peernet2id(struct net *net, struct net *peer, bool alloc)
 /* This function returns the id of a peer netns. If no id is assigned, one will
  * be allocated and returned.
  */
-int peernet2id(struct net *net, struct net *peer)
+int peernet2id_alloc(struct net *net, struct net *peer)
 {
 	bool alloc = atomic_read(&peer->count) == 0 ? false : true;
 
 	return __peernet2id(net, peer, alloc);
 }
-EXPORT_SYMBOL(peernet2id);
+EXPORT_SYMBOL(peernet2id_alloc);
 
 struct net *get_net_ns_by_id(struct net *net, int id)
 {

net/core/rtnetlink.c

@@ -1204,7 +1204,7 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
 		struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
 
 		if (!net_eq(dev_net(dev), link_net)) {
-			int id = peernet2id(dev_net(dev), link_net);
+			int id = peernet2id_alloc(dev_net(dev), link_net);
 
 			if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
 				goto nla_put_failure;