Merge conflicts with Yoshfuji's SNMP stats changes.

include/net/sctp/command.h

@@ -94,6 +94,9 @@ typedef enum {
 	SCTP_CMD_REPORT_FWDTSN,	 /* Report new cumulative TSN Ack. */
 	SCTP_CMD_PROCESS_FWDTSN, /* Skips were reported, so process further. */
 	SCTP_CMD_CLEAR_INIT_TAG, /* Clears association peer's inittag. */
+	SCTP_CMD_DEL_NON_PRIMARY, /* Removes non-primary peer transports. */
+	SCTP_CMD_T3_RTX_TIMERS_STOP, /* Stops T3-rtx pending timers */
+	SCTP_CMD_FORCE_PRIM_RETRAN,  /* Forces retrans. over primary path. */
 	SCTP_CMD_LAST
 } sctp_verb_t;
 

include/net/sctp/constants.h

@@ -175,6 +175,10 @@ typedef enum {
 	SCTP_IERROR_BAD_TAG,
 	SCTP_IERROR_BIG_GAP,
 	SCTP_IERROR_DUP_TSN,
+	SCTP_IERROR_HIGH_TSN,
+	SCTP_IERROR_IGNORE_TSN,
+	SCTP_IERROR_NO_DATA,
+	SCTP_IERROR_BAD_STREAM,
 
 } sctp_ierror_t;
 

include/net/sctp/sm.h

@@ -322,6 +322,9 @@ void sctp_send_stale_cookie_err(const struct sctp_endpoint *ep,
 				const struct sctp_chunk *chunk,
 				sctp_cmd_seq_t *commands,
 				struct sctp_chunk *err_chunk);
+int sctp_eat_data(const struct sctp_association *asoc,
+		  struct sctp_chunk *chunk,
+		  sctp_cmd_seq_t *commands);
 
 /* 3rd level prototypes */
 __u32 sctp_generate_tag(const struct sctp_endpoint *);

net/sctp/associola.c

@@ -1093,6 +1093,7 @@ static inline int sctp_peer_needs_update(struct sctp_association *asoc)
 	case SCTP_STATE_ESTABLISHED:
 	case SCTP_STATE_SHUTDOWN_PENDING:
 	case SCTP_STATE_SHUTDOWN_RECEIVED:
+	case SCTP_STATE_SHUTDOWN_SENT:
 		if ((asoc->rwnd > asoc->a_rwnd) &&
 		    ((asoc->rwnd - asoc->a_rwnd) >=
 		     min_t(__u32, (asoc->base.sk->sk_rcvbuf >> 1), asoc->pmtu)))

net/sctp/outqueue.c

@@ -525,10 +525,10 @@ static int sctp_outq_flush_rtx(struct sctp_outq *q, struct sctp_packet *pkt,
 			       int rtx_timeout, int *start_timer)
 {
 	struct list_head *lqueue;
-	struct list_head *lchunk;
+	struct list_head *lchunk, *lchunk1;
 	struct sctp_transport *transport = pkt->transport;
 	sctp_xmit_t status;
-	struct sctp_chunk *chunk;
+	struct sctp_chunk *chunk, *chunk1;
 	struct sctp_association *asoc;
 	int error = 0;
 
@@ -615,6 +615,12 @@ static int sctp_outq_flush_rtx(struct sctp_outq *q, struct sctp_packet *pkt,
 			 * the transmitted list.
 			 */
 			list_add_tail(lchunk, &transport->transmitted);
+
+			/* Mark the chunk as ineligible for fast retransmit 
+			 * after it is retransmitted.
+			 */
+			chunk->fast_retransmit = 0;
+
 			*start_timer = 1;
 			q->empty = 0;
 
@@ -622,6 +628,18 @@ static int sctp_outq_flush_rtx(struct sctp_outq *q, struct sctp_packet *pkt,
 			lchunk = sctp_list_dequeue(lqueue);
 			break;
 		};
+
+		/* If we are here due to a retransmit timeout or a fast
+		 * retransmit and if there are any chunks left in the retransmit
+		 * queue that could not fit in the PMTU sized packet, they need			 * to be marked as ineligible for a subsequent fast retransmit.
+		 */
+		if (rtx_timeout && !lchunk) {
+			list_for_each(lchunk1, lqueue) {
+				chunk1 = list_entry(lchunk1, struct sctp_chunk,
+						    transmitted_list);
+				chunk1->fast_retransmit = 0;
+			}
+		}
 	}
 
 	return error;

net/sctp/sm_make_chunk.c

@@ -1846,8 +1846,7 @@ int sctp_process_init(struct sctp_association *asoc, sctp_cid_t cid,
 		if (unlikely(!idr_pre_get(&sctp_assocs_id, gfp)))
 			goto clean_up;
 		spin_lock_bh(&sctp_assocs_id_lock);
-		error = idr_get_new(&sctp_assocs_id,
-				    (void *)asoc,
+		error = idr_get_new_above(&sctp_assocs_id, (void *)asoc, 1,
 					  &assoc_id);
 		spin_unlock_bh(&sctp_assocs_id_lock);
 		if (error == -EAGAIN)

net/sctp/sm_sideeffect.c

@@ -529,6 +529,23 @@ static void sctp_cmd_hb_timers_stop(sctp_cmd_seq_t *cmds,
 	}
 }
 
+/* Helper function to stop any pending T3-RTX timers */
+static void sctp_cmd_t3_rtx_timers_stop(sctp_cmd_seq_t *cmds,
+				        struct sctp_association *asoc)
+{
+	struct sctp_transport *t;
+	struct list_head *pos;
+
+	list_for_each(pos, &asoc->peer.transport_addr_list) {
+		t = list_entry(pos, struct sctp_transport, transports);
+		if (timer_pending(&t->T3_rtx_timer) &&
+		    del_timer(&t->T3_rtx_timer)) {
+			sctp_transport_put(t);
+		}
+	}
+}
+
+
 /* Helper function to update the heartbeat timer. */
 static void sctp_cmd_hb_timer_update(sctp_cmd_seq_t *cmds,
 				     struct sctp_association *asoc,
@@ -749,6 +766,26 @@ static void sctp_cmd_process_fwdtsn(struct sctp_ulpq *ulpq,
 	return;
 }
 
+/* Helper function to remove the association non-primary peer 
+ * transports.
+ */ 
+static void sctp_cmd_del_non_primary(struct sctp_association *asoc)
+{
+	struct sctp_transport *t;
+	struct list_head *pos;
+	struct list_head *temp;
+
+	list_for_each_safe(pos, temp, &asoc->peer.transport_addr_list) {
+		t = list_entry(pos, struct sctp_transport, transports);
+		if (!sctp_cmp_addr_exact(&t->ipaddr,
+		                         &asoc->peer.primary_addr)) {
+			sctp_assoc_del_peer(asoc, &t->ipaddr);
+		}
+	}
+
+	return;
+}
+
 /* These three macros allow us to pull the debugging code out of the
  * main flow of sctp_do_sm() to keep attention focused on the real
  * functionality there.
@@ -1048,6 +1085,27 @@ int sctp_cmd_interpreter(sctp_event_t event_type, sctp_subtype_t subtype,
 			if (cmd->obj.ptr)
 				sctp_add_cmd_sf(commands, SCTP_CMD_REPLY,
 						SCTP_CHUNK(cmd->obj.ptr));
+
+			/* FIXME - Eventually come up with a cleaner way to
+			 * enabling COOKIE-ECHO + DATA bundling during 
+			 * multihoming stale cookie scenarios, the following 
+			 * command plays with asoc->peer.retran_path to 
+			 * avoid the problem of sending the COOKIE-ECHO and 
+			 * DATA in different paths, which could result 
+			 * in the association being ABORTed if the DATA chunk 
+			 * is processed first by the server.  Checking the
+			 * init error counter simply causes this command
+			 * to be executed only during failed attempts of
+			 * association establishment.
+			 */
+			if ((asoc->peer.retran_path != 
+			     asoc->peer.primary_path) && 
+			    (asoc->counters[SCTP_COUNTER_INIT_ERROR] > 0)) {
+				sctp_add_cmd_sf(commands, 
+				                SCTP_CMD_FORCE_PRIM_RETRAN,
+						SCTP_NULL());
+			}
+
 			break;
 
 		case SCTP_CMD_GEN_SHUTDOWN:
@@ -1282,6 +1340,19 @@ int sctp_cmd_interpreter(sctp_event_t event_type, sctp_subtype_t subtype,
 		case SCTP_CMD_CLEAR_INIT_TAG:
 			asoc->peer.i.init_tag = 0;
 			break;
+		case SCTP_CMD_DEL_NON_PRIMARY:
+			sctp_cmd_del_non_primary(asoc);
+			break;
+		case SCTP_CMD_T3_RTX_TIMERS_STOP:
+			sctp_cmd_t3_rtx_timers_stop(commands, asoc);
+			break;
+		case SCTP_CMD_FORCE_PRIM_RETRAN:
+			t = asoc->peer.retran_path;
+			asoc->peer.retran_path = asoc->peer.primary_path;
+			error = sctp_outq_uncork(&asoc->outqueue);
+			local_cork = 0;
+			asoc->peer.retran_path = t;
+			break;
 		default:
 			printk(KERN_WARNING "Impossible command: %u, %p\n",
 			       cmd->verb, cmd->obj.ptr);

net/sctp/socket.c

@@ -1697,6 +1697,32 @@ static int sctp_setsockopt_peer_addr_params(struct sock *sk,
 	if (copy_from_user(&params, optval, optlen))
 		return -EFAULT;
 
+	/*
+	 * API 7. Socket Options (setting the default value for the endpoint)
+	 * All options that support specific settings on an association by
+	 * filling in either an association id variable or a sockaddr_storage
+	 * SHOULD also support setting of the same value for the entire endpoint
+	 * (i.e. future associations). To accomplish this the following logic is
+	 * used when setting one of these options:
+
+	 * c) If neither the sockaddr_storage or association identification is
+	 *    set i.e. the sockaddr_storage is set to all 0's (INADDR_ANY) and
+	 *    the association identification is 0, the settings are a default
+	 *    and to be applied to the endpoint (all future associations).
+	 */
+
+	/* update default value for endpoint (all future associations) */
+	if (!params.spp_assoc_id && 
+	    sctp_is_any(( union sctp_addr *)&params.spp_address)) {
+		if (params.spp_hbinterval)
+			sctp_sk(sk)->paddrparam.spp_hbinterval =
+						params.spp_hbinterval;
+		if (sctp_max_retrans_path)
+			sctp_sk(sk)->paddrparam.spp_pathmaxrxt =
+						params.spp_pathmaxrxt;
+		return 0;
+	}
+
 	trans = sctp_addr_id2transport(sk, &params.spp_address,
 				       params.spp_assoc_id);
 	if (!trans)
@@ -2864,6 +2890,17 @@ static int sctp_getsockopt_peer_addr_params(struct sock *sk, int len,
 	if (copy_from_user(&params, optval, len))
 		return -EFAULT;
 
+	/* If no association id is specified retrieve the default value
+	 * for the endpoint that will be used for all future associations
+	 */
+	if (!params.spp_assoc_id &&
+	    sctp_is_any(( union sctp_addr *)&params.spp_address)) {
+		params.spp_hbinterval = sctp_sk(sk)->paddrparam.spp_hbinterval;
+		params.spp_pathmaxrxt = sctp_sk(sk)->paddrparam.spp_pathmaxrxt;
+
+		goto done;
+	}
+
 	trans = sctp_addr_id2transport(sk, &params.spp_address,
 				       params.spp_assoc_id);
 	if (!trans)
@@ -2883,6 +2920,7 @@ static int sctp_getsockopt_peer_addr_params(struct sock *sk, int len,
 	 */
 	params.spp_pathmaxrxt = trans->error_threshold;
 
+done:
 	if (copy_to_user(optval, &params, len))
 		return -EFAULT;