rxrpc: Stash the network namespace pointer in rxrpc_local

Stash the network namespace pointer in the rxrpc_local struct in addition
to a pointer to the rxrpc-specific net namespace info. Use this to remove
some places where the socket is passed as a parameter.

Signed-off-by: David Howells <[e-mail]>
cc: Marc Dionne <[e-mail]>
cc: [e-mail]

net/rxrpc/ar-internal.h

···
 	struct rcu_head		rcu;
 	atomic_t		active_users;	/* Number of users of the local endpoint */
 	refcount_t		ref;		/* Number of references to the structure */
-	struct rxrpc_net	*rxnet;		/* The network ns in which this resides */
+	struct net		*net;		/* The network namespace */
+	struct rxrpc_net	*rxnet;		/* Our bits in the network namespace */
 	struct hlist_node	link;
 	struct socket		*socket;	/* my UDP socket */
 	struct task_struct	*io_thread;
···
  */
 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *,
 					 const struct sockaddr_rxrpc *);
-struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *,
-				     struct sockaddr_rxrpc *, gfp_t);
+struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *local,
+				     struct sockaddr_rxrpc *srx, gfp_t gfp);
 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t,
 				    enum rxrpc_peer_trace);
-void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *,
-			     struct rxrpc_peer *);
+void rxrpc_new_incoming_peer(struct rxrpc_local *local, struct rxrpc_peer *peer);
 void rxrpc_destroy_all_peers(struct rxrpc_net *);
 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *, enum rxrpc_peer_trace);
 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *, enum rxrpc_peer_trace);

net/rxrpc/call_accept.c

···
 					  (peer_tail + 1) &
 					  (RXRPC_BACKLOG_MAX - 1));
 
-			rxrpc_new_incoming_peer(rx, local, peer);
+			rxrpc_new_incoming_peer(local, peer);
 		}
 
 		/* Now allocate and set up the connection */

net/rxrpc/conn_client.c

···
 
 	_enter("{%d,%lx},", call->debug_id, call->user_call_ID);
 
-	cp->peer = rxrpc_lookup_peer(rx, cp->local, srx, gfp);
+	cp->peer = rxrpc_lookup_peer(cp->local, srx, gfp);
 	if (!cp->peer)
 		goto error;
 

net/rxrpc/local_object.c

···
 /*
  * Allocate a new local endpoint.
  */
-static struct rxrpc_local *rxrpc_alloc_local(struct rxrpc_net *rxnet,
+static struct rxrpc_local *rxrpc_alloc_local(struct net *net,
 					     const struct sockaddr_rxrpc *srx)
 {
 	struct rxrpc_local *local;
···
 	if (local) {
 		refcount_set(&local->ref, 1);
 		atomic_set(&local->active_users, 1);
-		local->rxnet = rxnet;
+		local->net = net;
+		local->rxnet = rxrpc_net(net);
 		INIT_HLIST_NODE(&local->link);
 		init_rwsem(&local->defrag_sem);
 		init_completion(&local->io_thread_ready);
···
 		goto found;
 	}
 
-	local = rxrpc_alloc_local(rxnet, srx);
+	local = rxrpc_alloc_local(net, srx);
 	if (!local)
 		goto nomem;
 

net/rxrpc/peer_object.c

···
  * assess the MTU size for the network interface through which this peer is
  * reached
  */
-static void rxrpc_assess_MTU_size(struct rxrpc_sock *rx,
+static void rxrpc_assess_MTU_size(struct rxrpc_local *local,
 				  struct rxrpc_peer *peer)
 {
-	struct net *net = sock_net(&rx->sk);
+	struct net *net = local->net;
 	struct dst_entry *dst;
 	struct rtable *rt;
 	struct flowi fl;
···
 /*
  * Initialise peer record.
  */
-static void rxrpc_init_peer(struct rxrpc_sock *rx, struct rxrpc_peer *peer,
+static void rxrpc_init_peer(struct rxrpc_local *local, struct rxrpc_peer *peer,
 			    unsigned long hash_key)
 {
 	peer->hash_key = hash_key;
-	rxrpc_assess_MTU_size(rx, peer);
+	rxrpc_assess_MTU_size(local, peer);
 	peer->mtu = peer->if_mtu;
 	peer->rtt_last_req = ktime_get_real();
 
···
 /*
  * Set up a new peer.
  */
-static struct rxrpc_peer *rxrpc_create_peer(struct rxrpc_sock *rx,
-					    struct rxrpc_local *local,
+static struct rxrpc_peer *rxrpc_create_peer(struct rxrpc_local *local,
 					    struct sockaddr_rxrpc *srx,
 					    unsigned long hash_key,
 					    gfp_t gfp)
···
 	peer = rxrpc_alloc_peer(local, gfp, rxrpc_peer_new_client);
 	if (peer) {
 		memcpy(&peer->srx, srx, sizeof(*srx));
-		rxrpc_init_peer(rx, peer, hash_key);
+		rxrpc_init_peer(local, peer, hash_key);
 	}
 
 	_leave(" = %p", peer);
···
  * since we've already done a search in the list from the non-reentrant context
  * (the data_ready handler) that is the only place we can add new peers.
  */
-void rxrpc_new_incoming_peer(struct rxrpc_sock *rx, struct rxrpc_local *local,
-			     struct rxrpc_peer *peer)
+void rxrpc_new_incoming_peer(struct rxrpc_local *local, struct rxrpc_peer *peer)
 {
 	struct rxrpc_net *rxnet = local->rxnet;
 	unsigned long hash_key;
 
 	hash_key = rxrpc_peer_hash_key(local, &peer->srx);
-	rxrpc_init_peer(rx, peer, hash_key);
+	rxrpc_init_peer(local, peer, hash_key);
 
 	spin_lock(&rxnet->peer_hash_lock);
 	hash_add_rcu(rxnet->peer_hash, &peer->hash_link, hash_key);
···
 /*
  * obtain a remote transport endpoint for the specified address
  */
-struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *rx,
-				     struct rxrpc_local *local,
+struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *local,
 				     struct sockaddr_rxrpc *srx, gfp_t gfp)
 {
 	struct rxrpc_peer *peer, *candidate;
···
 		/* The peer is not yet present in hash - create a candidate
 		 * for a new record and then redo the search.
 		 */
-		candidate = rxrpc_create_peer(rx, local, srx, hash_key, gfp);
+		candidate = rxrpc_create_peer(local, srx, hash_key, gfp);
 		if (!candidate) {
 			_leave(" = NULL [nomem]");
 			return NULL;