---

yaml
---
r: 342031
b: refs/heads/master
c: 45122ca
h: refs/heads/master
i:
  342029: f5f3af2
  342027: 9e55087
  342023: e912375
  342015: d27ce33
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 0b0fe913bf6d551642eb8892ed90be7358906379
+refs/heads/master: 45122ca26ced7fae41049326a3797a73f961db2e

trunk/include/net/sctp/structs.h

@@ -949,6 +949,8 @@ struct sctp_transport {
 
 	/* 64-bit random number sent with heartbeat. */
 	__u64 hb_nonce;
+
+	struct rcu_head rcu;
 };
 
 struct sctp_transport *sctp_transport_new(struct net *, const union sctp_addr *,

trunk/net/sctp/associola.c

@@ -448,7 +448,7 @@ void sctp_association_free(struct sctp_association *asoc)
 	/* Release the transport structures. */
 	list_for_each_safe(pos, temp, &asoc->peer.transport_addr_list) {
 		transport = list_entry(pos, struct sctp_transport, transports);
-		list_del(pos);
+		list_del_rcu(pos);
 		sctp_transport_free(transport);
 	}
 
@@ -568,7 +568,7 @@ void sctp_assoc_rm_peer(struct sctp_association *asoc,
 		sctp_assoc_update_retran_path(asoc);
 
 	/* Remove this peer from the list. */
-	list_del(&peer->transports);
+	list_del_rcu(&peer->transports);
 
 	/* Get the first transport of asoc. */
 	pos = asoc->peer.transport_addr_list.next;
@@ -769,7 +769,7 @@ struct sctp_transport *sctp_assoc_add_peer(struct sctp_association *asoc,
 	peer->state = peer_state;
 
 	/* Attach the remote transport to our asoc.  */
-	list_add_tail(&peer->transports, &asoc->peer.transport_addr_list);
+	list_add_tail_rcu(&peer->transports, &asoc->peer.transport_addr_list);
 	asoc->peer.transport_count++;
 
 	/* If we do not yet have a primary path, set one.  */

trunk/net/sctp/proc.c

@@ -162,15 +162,20 @@ static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_associa
 	struct sctp_af *af;
 
 	primary = &assoc->peer.primary_addr;
-	list_for_each_entry(transport, &assoc->peer.transport_addr_list,
+	rcu_read_lock();
+	list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list,
 			transports) {
 		addr = &transport->ipaddr;
+		if (transport->dead)
+			continue;
+
 		af = sctp_get_af_specific(addr->sa.sa_family);
 		if (af->cmp_addr(addr, primary)) {
 			seq_printf(seq, "*");
 		}
 		af->seq_dump_addr(seq, addr);
 	}
+	rcu_read_unlock();
 }
 
 static void * sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
@@ -441,12 +446,16 @@ static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
 	head = &sctp_assoc_hashtable[hash];
 	sctp_local_bh_disable();
 	read_lock(&head->lock);
+	rcu_read_lock();
 	sctp_for_each_hentry(epb, node, &head->chain) {
 		if (!net_eq(sock_net(epb->sk), seq_file_net(seq)))
 			continue;
 		assoc = sctp_assoc(epb);
-		list_for_each_entry(tsp, &assoc->peer.transport_addr_list,
+		list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
 					transports) {
+			if (tsp->dead)
+				continue;
+
 			/*
 			 * The remote address (ADDR)
 			 */
@@ -492,6 +501,7 @@ static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
 		}
 	}
 
+	rcu_read_unlock();
 	read_unlock(&head->lock);
 	sctp_local_bh_enable();
 

trunk/net/sctp/transport.c

@@ -163,13 +163,11 @@ void sctp_transport_free(struct sctp_transport *transport)
 	sctp_transport_put(transport);
 }
 
-/* Destroy the transport data structure.
- * Assumes there are no more users of this structure.
- */
-static void sctp_transport_destroy(struct sctp_transport *transport)
+static void sctp_transport_destroy_rcu(struct rcu_head *head)
 {
-	SCTP_ASSERT(transport->dead, "Transport is not dead", return);
+	struct sctp_transport *transport;
 
+	transport = container_of(head, struct sctp_transport, rcu);
 	if (transport->asoc)
 		sctp_association_put(transport->asoc);
 
@@ -180,6 +178,16 @@ static void sctp_transport_destroy(struct sctp_transport *transport)
 	SCTP_DBG_OBJCNT_DEC(transport);
 }
 
+/* Destroy the transport data structure.
+ * Assumes there are no more users of this structure.
+ */
+static void sctp_transport_destroy(struct sctp_transport *transport)
+{
+	SCTP_ASSERT(transport->dead, "Transport is not dead", return);
+
+	call_rcu(&transport->rcu, sctp_transport_destroy_rcu);
+}
+
 /* Start T3_rtx timer if it is not already running and update the heartbeat
  * timer.  This routine is called every time a DATA chunk is sent.
  */