--- zzzz-none-000/linux-3.10.107/net/tipc/subscr.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/net/tipc/subscr.c	2021-02-04 17:41:59.000000000 +0000
@@ -2,7 +2,7 @@
  * net/tipc/subscr.c: TIPC network topology service
  *
  * Copyright (c) 2000-2006, Ericsson AB
- * Copyright (c) 2005-2007, 2010-2011, Wind River Systems
+ * Copyright (c) 2005-2007, 2010-2013, Wind River Systems
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -36,38 +36,24 @@
 
 #include "core.h"
 #include "name_table.h"
-#include "port.h"
 #include "subscr.h"
 
 /**
  * struct tipc_subscriber - TIPC network topology subscriber
- * @port_ref: object reference to server port connecting to subscriber
- * @lock: pointer to spinlock controlling access to subscriber's server port
- * @subscriber_list: adjacent subscribers in top. server's list of subscribers
- * @subscription_list: list of subscription objects for this subscriber
+ * @kref: reference counter to tipc_subscription object
+ * @conid: connection identifier to server connecting to subscriber
+ * @lock: control access to subscriber
+ * @subscrp_list: list of subscription objects for this subscriber
  */
 struct tipc_subscriber {
-	u32 port_ref;
-	spinlock_t *lock;
-	struct list_head subscriber_list;
-	struct list_head subscription_list;
-};
-
-/**
- * struct top_srv - TIPC network topology subscription service
- * @setup_port: reference to TIPC port that handles subscription requests
- * @subscription_count: number of active subscriptions (not subscribers!)
- * @subscriber_list: list of ports subscribing to service
- * @lock: spinlock govering access to subscriber list
- */
-struct top_srv {
-	u32 setup_port;
-	atomic_t subscription_count;
-	struct list_head subscriber_list;
+	struct kref kref;
+	int conid;
 	spinlock_t lock;
+	struct list_head subscrp_list;
 };
 
-static struct top_srv topsrv;
+static void tipc_subscrp_delete(struct tipc_subscription *sub);
+static void tipc_subscrb_put(struct tipc_subscriber *subscriber);
 
 /**
  * htohl - convert value to endianness used by destination
@@ -81,41 +67,33 @@
 	return swap ? swab32(in) : in;
 }
 
-/**
- * subscr_send_event - send a message containing a tipc_event to the subscriber
- *
- * Note: Must not hold subscriber's server port lock, since tipc_send() will
- *       try to take the lock if the message is rejected and returned!
- */
-static void subscr_send_event(struct tipc_subscription *sub,
-			      u32 found_lower,
-			      u32 found_upper,
-			      u32 event,
-			      u32 port_ref,
-			      u32 node)
-{
-	struct iovec msg_sect;
+static void tipc_subscrp_send_event(struct tipc_subscription *sub,
+				    u32 found_lower, u32 found_upper,
+				    u32 event, u32 port_ref, u32 node)
+{
+	struct tipc_net *tn = net_generic(sub->net, tipc_net_id);
+	struct tipc_subscriber *subscriber = sub->subscriber;
+	struct kvec msg_sect;
 
 	msg_sect.iov_base = (void *)&sub->evt;
 	msg_sect.iov_len = sizeof(struct tipc_event);
-
 	sub->evt.event = htohl(event, sub->swap);
 	sub->evt.found_lower = htohl(found_lower, sub->swap);
 	sub->evt.found_upper = htohl(found_upper, sub->swap);
 	sub->evt.port.ref = htohl(port_ref, sub->swap);
 	sub->evt.port.node = htohl(node, sub->swap);
-	tipc_send(sub->server_ref, 1, &msg_sect, msg_sect.iov_len);
+	tipc_conn_sendmsg(tn->topsrv, subscriber->conid, NULL,
+			  msg_sect.iov_base, msg_sect.iov_len);
 }
 
 /**
- * tipc_subscr_overlap - test for subscription overlap with the given values
+ * tipc_subscrp_check_overlap - test for subscription overlap with the
+ * given values
  *
  * Returns 1 if there is overlap, otherwise 0.
  */
-int tipc_subscr_overlap(struct tipc_subscription *sub,
-			u32 found_lower,
-			u32 found_upper)
-
+int tipc_subscrp_check_overlap(struct tipc_subscription *sub, u32 found_lower,
+			       u32 found_upper)
 {
 	if (found_lower < sub->seq.lower)
 		found_lower = sub->seq.lower;
@@ -126,170 +104,123 @@
 	return 1;
 }
 
-/**
- * tipc_subscr_report_overlap - issue event if there is subscription overlap
- *
- * Protected by nameseq.lock in name_table.c
- */
-void tipc_subscr_report_overlap(struct tipc_subscription *sub,
-				u32 found_lower,
-				u32 found_upper,
-				u32 event,
-				u32 port_ref,
-				u32 node,
-				int must)
+void tipc_subscrp_report_overlap(struct tipc_subscription *sub, u32 found_lower,
+				 u32 found_upper, u32 event, u32 port_ref,
+				 u32 node, int must)
 {
-	if (!tipc_subscr_overlap(sub, found_lower, found_upper))
+	if (!tipc_subscrp_check_overlap(sub, found_lower, found_upper))
 		return;
 	if (!must && !(sub->filter & TIPC_SUB_PORTS))
 		return;
 
-	subscr_send_event(sub, found_lower, found_upper, event, port_ref, node);
+	tipc_subscrp_send_event(sub, found_lower, found_upper, event, port_ref,
+				node);
 }
 
-/**
- * subscr_timeout - subscription timeout has occurred
- */
-static void subscr_timeout(struct tipc_subscription *sub)
+static void tipc_subscrp_timeout(unsigned long data)
 {
-	struct tipc_port *server_port;
-
-	/* Validate server port reference (in case subscriber is terminating) */
-	server_port = tipc_port_lock(sub->server_ref);
-	if (server_port == NULL)
-		return;
+	struct tipc_subscription *sub = (struct tipc_subscription *)data;
+	struct tipc_subscriber *subscriber = sub->subscriber;
 
-	/* Validate timeout (in case subscription is being cancelled) */
-	if (sub->timeout == TIPC_WAIT_FOREVER) {
-		tipc_port_unlock(server_port);
-		return;
-	}
+	/* Notify subscriber of timeout */
+	tipc_subscrp_send_event(sub, sub->evt.s.seq.lower, sub->evt.s.seq.upper,
+				TIPC_SUBSCR_TIMEOUT, 0, 0);
 
-	/* Unlink subscription from name table */
-	tipc_nametbl_unsubscribe(sub);
+	spin_lock_bh(&subscriber->lock);
+	tipc_subscrp_delete(sub);
+	spin_unlock_bh(&subscriber->lock);
 
-	/* Unlink subscription from subscriber */
-	list_del(&sub->subscription_list);
+	tipc_subscrb_put(subscriber);
+}
 
-	/* Release subscriber's server port */
-	tipc_port_unlock(server_port);
+static void tipc_subscrb_kref_release(struct kref *kref)
+{
+	struct tipc_subscriber *subcriber = container_of(kref,
+					    struct tipc_subscriber, kref);
 
-	/* Notify subscriber of timeout */
-	subscr_send_event(sub, sub->evt.s.seq.lower, sub->evt.s.seq.upper,
-			  TIPC_SUBSCR_TIMEOUT, 0, 0);
+	kfree(subcriber);
+}
 
-	/* Now destroy subscription */
-	k_term_timer(&sub->timer);
-	kfree(sub);
-	atomic_dec(&topsrv.subscription_count);
+static void tipc_subscrb_put(struct tipc_subscriber *subscriber)
+{
+	kref_put(&subscriber->kref, tipc_subscrb_kref_release);
 }
 
-/**
- * subscr_del - delete a subscription within a subscription list
- *
- * Called with subscriber port locked.
- */
-static void subscr_del(struct tipc_subscription *sub)
+static void tipc_subscrb_get(struct tipc_subscriber *subscriber)
 {
-	tipc_nametbl_unsubscribe(sub);
-	list_del(&sub->subscription_list);
-	kfree(sub);
-	atomic_dec(&topsrv.subscription_count);
+	kref_get(&subscriber->kref);
 }
 
-/**
- * subscr_terminate - terminate communication with a subscriber
- *
- * Called with subscriber port locked.  Routine must temporarily release lock
- * to enable subscription timeout routine(s) to finish without deadlocking;
- * the lock is then reclaimed to allow caller to release it upon return.
- * (This should work even in the unlikely event some other thread creates
- * a new object reference in the interim that uses this lock; this routine will
- * simply wait for it to be released, then claim it.)
- */
-static void subscr_terminate(struct tipc_subscriber *subscriber)
+static struct tipc_subscriber *tipc_subscrb_create(int conid)
 {
-	u32 port_ref;
-	struct tipc_subscription *sub;
-	struct tipc_subscription *sub_temp;
+	struct tipc_subscriber *subscriber;
 
-	/* Invalidate subscriber reference */
-	port_ref = subscriber->port_ref;
-	subscriber->port_ref = 0;
-	spin_unlock_bh(subscriber->lock);
-
-	/* Sever connection to subscriber */
-	tipc_shutdown(port_ref);
-	tipc_deleteport(port_ref);
+	subscriber = kzalloc(sizeof(*subscriber), GFP_ATOMIC);
+	if (!subscriber) {
+		pr_warn("Subscriber rejected, no memory\n");
+		return NULL;
+	}
+	kref_init(&subscriber->kref);
+	INIT_LIST_HEAD(&subscriber->subscrp_list);
+	subscriber->conid = conid;
+	spin_lock_init(&subscriber->lock);
+
+	return subscriber;
+}
+
+static void tipc_subscrb_delete(struct tipc_subscriber *subscriber)
+{
+	struct tipc_subscription *sub, *temp;
 
+	spin_lock_bh(&subscriber->lock);
 	/* Destroy any existing subscriptions for subscriber */
-	list_for_each_entry_safe(sub, sub_temp, &subscriber->subscription_list,
-				 subscription_list) {
-		if (sub->timeout != TIPC_WAIT_FOREVER) {
-			k_cancel_timer(&sub->timer);
-			k_term_timer(&sub->timer);
+	list_for_each_entry_safe(sub, temp, &subscriber->subscrp_list,
+				 subscrp_list) {
+		if (del_timer(&sub->timer)) {
+			tipc_subscrp_delete(sub);
+			tipc_subscrb_put(subscriber);
 		}
-		subscr_del(sub);
 	}
+	spin_unlock_bh(&subscriber->lock);
 
-	/* Remove subscriber from topology server's subscriber list */
-	spin_lock_bh(&topsrv.lock);
-	list_del(&subscriber->subscriber_list);
-	spin_unlock_bh(&topsrv.lock);
+	tipc_subscrb_put(subscriber);
+}
 
-	/* Reclaim subscriber lock */
-	spin_lock_bh(subscriber->lock);
+static void tipc_subscrp_delete(struct tipc_subscription *sub)
+{
+	struct tipc_net *tn = net_generic(sub->net, tipc_net_id);
 
-	/* Now destroy subscriber */
-	kfree(subscriber);
+	tipc_nametbl_unsubscribe(sub);
+	list_del(&sub->subscrp_list);
+	kfree(sub);
+	atomic_dec(&tn->subscription_count);
 }
 
-/**
- * subscr_cancel - handle subscription cancellation request
- *
- * Called with subscriber port locked.  Routine must temporarily release lock
- * to enable the subscription timeout routine to finish without deadlocking;
- * the lock is then reclaimed to allow caller to release it upon return.
- *
- * Note that fields of 's' use subscriber's endianness!
- */
-static void subscr_cancel(struct tipc_subscr *s,
-			  struct tipc_subscriber *subscriber)
+static void tipc_subscrp_cancel(struct tipc_subscr *s,
+				struct tipc_subscriber *subscriber)
 {
-	struct tipc_subscription *sub;
-	struct tipc_subscription *sub_temp;
-	int found = 0;
+	struct tipc_subscription *sub, *temp;
 
+	spin_lock_bh(&subscriber->lock);
 	/* Find first matching subscription, exit if not found */
-	list_for_each_entry_safe(sub, sub_temp, &subscriber->subscription_list,
-				 subscription_list) {
+	list_for_each_entry_safe(sub, temp, &subscriber->subscrp_list,
+				 subscrp_list) {
 		if (!memcmp(s, &sub->evt.s, sizeof(struct tipc_subscr))) {
-			found = 1;
+			if (del_timer(&sub->timer)) {
+				tipc_subscrp_delete(sub);
+				tipc_subscrb_put(subscriber);
+			}
 			break;
 		}
 	}
-	if (!found)
-		return;
-
-	/* Cancel subscription timer (if used), then delete subscription */
-	if (sub->timeout != TIPC_WAIT_FOREVER) {
-		sub->timeout = TIPC_WAIT_FOREVER;
-		spin_unlock_bh(subscriber->lock);
-		k_cancel_timer(&sub->timer);
-		k_term_timer(&sub->timer);
-		spin_lock_bh(subscriber->lock);
-	}
-	subscr_del(sub);
+	spin_unlock_bh(&subscriber->lock);
 }
 
-/**
- * subscr_subscribe - create subscription for subscriber
- *
- * Called with subscriber port locked.
- */
-static struct tipc_subscription *subscr_subscribe(struct tipc_subscr *s,
-					     struct tipc_subscriber *subscriber)
+static int tipc_subscrp_create(struct net *net, struct tipc_subscr *s,
+			       struct tipc_subscriber *subscriber,
+			       struct tipc_subscription **sub_p)
 {
+	struct tipc_net *tn = net_generic(net, tipc_net_id);
 	struct tipc_subscription *sub;
 	int swap;
 
@@ -299,245 +230,126 @@
 	/* Detect & process a subscription cancellation request */
 	if (s->filter & htohl(TIPC_SUB_CANCEL, swap)) {
 		s->filter &= ~htohl(TIPC_SUB_CANCEL, swap);
-		subscr_cancel(s, subscriber);
-		return NULL;
+		tipc_subscrp_cancel(s, subscriber);
+		return 0;
 	}
 
 	/* Refuse subscription if global limit exceeded */
-	if (atomic_read(&topsrv.subscription_count) >= TIPC_MAX_SUBSCRIPTIONS) {
+	if (atomic_read(&tn->subscription_count) >= TIPC_MAX_SUBSCRIPTIONS) {
 		pr_warn("Subscription rejected, limit reached (%u)\n",
 			TIPC_MAX_SUBSCRIPTIONS);
-		subscr_terminate(subscriber);
-		return NULL;
+		return -EINVAL;
 	}
 
 	/* Allocate subscription object */
 	sub = kmalloc(sizeof(*sub), GFP_ATOMIC);
 	if (!sub) {
 		pr_warn("Subscription rejected, no memory\n");
-		subscr_terminate(subscriber);
-		return NULL;
+		return -ENOMEM;
 	}
 
 	/* Initialize subscription object */
+	sub->net = net;
 	sub->seq.type = htohl(s->seq.type, swap);
 	sub->seq.lower = htohl(s->seq.lower, swap);
 	sub->seq.upper = htohl(s->seq.upper, swap);
-	sub->timeout = htohl(s->timeout, swap);
+	sub->timeout = msecs_to_jiffies(htohl(s->timeout, swap));
 	sub->filter = htohl(s->filter, swap);
 	if ((!(sub->filter & TIPC_SUB_PORTS) ==
 	     !(sub->filter & TIPC_SUB_SERVICE)) ||
 	    (sub->seq.lower > sub->seq.upper)) {
 		pr_warn("Subscription rejected, illegal request\n");
 		kfree(sub);
-		subscr_terminate(subscriber);
-		return NULL;
+		return -EINVAL;
 	}
-	INIT_LIST_HEAD(&sub->nameseq_list);
-	list_add(&sub->subscription_list, &subscriber->subscription_list);
-	sub->server_ref = subscriber->port_ref;
+	spin_lock_bh(&subscriber->lock);
+	list_add(&sub->subscrp_list, &subscriber->subscrp_list);
+	spin_unlock_bh(&subscriber->lock);
+	sub->subscriber = subscriber;
 	sub->swap = swap;
-	memcpy(&sub->evt.s, s, sizeof(struct tipc_subscr));
-	atomic_inc(&topsrv.subscription_count);
-	if (sub->timeout != TIPC_WAIT_FOREVER) {
-		k_init_timer(&sub->timer,
-			     (Handler)subscr_timeout, (unsigned long)sub);
-		k_start_timer(&sub->timer, sub->timeout);
-	}
-
-	return sub;
+	memcpy(&sub->evt.s, s, sizeof(*s));
+	atomic_inc(&tn->subscription_count);
+	setup_timer(&sub->timer, tipc_subscrp_timeout, (unsigned long)sub);
+	if (sub->timeout != TIPC_WAIT_FOREVER)
+		sub->timeout += jiffies;
+	if (!mod_timer(&sub->timer, sub->timeout))
+		tipc_subscrb_get(subscriber);
+	*sub_p = sub;
+	return 0;
 }
 
-/**
- * subscr_conn_shutdown_event - handle termination request from subscriber
- *
- * Called with subscriber's server port unlocked.
- */
-static void subscr_conn_shutdown_event(void *usr_handle,
-				       u32 port_ref,
-				       struct sk_buff **buf,
-				       unsigned char const *data,
-				       unsigned int size,
-				       int reason)
+/* Handle one termination request for the subscriber */
+static void tipc_subscrb_shutdown_cb(int conid, void *usr_data)
 {
-	struct tipc_subscriber *subscriber = usr_handle;
-	spinlock_t *subscriber_lock;
-
-	if (tipc_port_lock(port_ref) == NULL)
-		return;
-
-	subscriber_lock = subscriber->lock;
-	subscr_terminate(subscriber);
-	spin_unlock_bh(subscriber_lock);
+	tipc_subscrb_delete((struct tipc_subscriber *)usr_data);
 }
 
-/**
- * subscr_conn_msg_event - handle new subscription request from subscriber
- *
- * Called with subscriber's server port unlocked.
- */
-static void subscr_conn_msg_event(void *usr_handle,
-				  u32 port_ref,
-				  struct sk_buff **buf,
-				  const unchar *data,
-				  u32 size)
+/* Handle one request to create a new subscription for the subscriber */
+static void tipc_subscrb_rcv_cb(struct net *net, int conid,
+				struct sockaddr_tipc *addr, void *usr_data,
+				void *buf, size_t len)
 {
-	struct tipc_subscriber *subscriber = usr_handle;
-	spinlock_t *subscriber_lock;
-	struct tipc_subscription *sub;
+	struct tipc_subscriber *subscrb = usr_data;
+	struct tipc_subscription *sub = NULL;
+	struct tipc_net *tn = net_generic(net, tipc_net_id);
 
-	/*
-	 * Lock subscriber's server port (& make a local copy of lock pointer,
-	 * in case subscriber is deleted while processing subscription request)
-	 */
-	if (tipc_port_lock(port_ref) == NULL)
-		return;
-
-	subscriber_lock = subscriber->lock;
+	if (tipc_subscrp_create(net, (struct tipc_subscr *)buf, subscrb, &sub))
+		return tipc_conn_terminate(tn->topsrv, subscrb->conid);
 
-	if (size != sizeof(struct tipc_subscr)) {
-		subscr_terminate(subscriber);
-		spin_unlock_bh(subscriber_lock);
-	} else {
-		sub = subscr_subscribe((struct tipc_subscr *)data, subscriber);
-		spin_unlock_bh(subscriber_lock);
-		if (sub != NULL) {
-
-			/*
-			 * We must release the server port lock before adding a
-			 * subscription to the name table since TIPC needs to be
-			 * able to (re)acquire the port lock if an event message
-			 * issued by the subscription process is rejected and
-			 * returned.  The subscription cannot be deleted while
-			 * it is being added to the name table because:
-			 * a) the single-threading of the native API port code
-			 *    ensures the subscription cannot be cancelled and
-			 *    the subscriber connection cannot be broken, and
-			 * b) the name table lock ensures the subscription
-			 *    timeout code cannot delete the subscription,
-			 * so the subscription object is still protected.
-			 */
-			tipc_nametbl_subscribe(sub);
-		}
-	}
+	if (sub)
+		tipc_nametbl_subscribe(sub);
 }
 
-/**
- * subscr_named_msg_event - handle request to establish a new subscriber
- */
-static void subscr_named_msg_event(void *usr_handle,
-				   u32 port_ref,
-				   struct sk_buff **buf,
-				   const unchar *data,
-				   u32 size,
-				   u32 importance,
-				   struct tipc_portid const *orig,
-				   struct tipc_name_seq const *dest)
+/* Handle one request to establish a new subscriber */
+static void *tipc_subscrb_connect_cb(int conid)
 {
-	struct tipc_subscriber *subscriber;
-	u32 server_port_ref;
-
-	/* Create subscriber object */
-	subscriber = kzalloc(sizeof(struct tipc_subscriber), GFP_ATOMIC);
-	if (subscriber == NULL) {
-		pr_warn("Subscriber rejected, no memory\n");
-		return;
-	}
-	INIT_LIST_HEAD(&subscriber->subscription_list);
-	INIT_LIST_HEAD(&subscriber->subscriber_list);
-
-	/* Create server port & establish connection to subscriber */
-	tipc_createport(subscriber,
-			importance,
-			NULL,
-			NULL,
-			subscr_conn_shutdown_event,
-			NULL,
-			NULL,
-			subscr_conn_msg_event,
-			NULL,
-			&subscriber->port_ref);
-	if (subscriber->port_ref == 0) {
-		pr_warn("Subscriber rejected, unable to create port\n");
-		kfree(subscriber);
-		return;
-	}
-	tipc_connect(subscriber->port_ref, orig);
-
-	/* Lock server port (& save lock address for future use) */
-	subscriber->lock = tipc_port_lock(subscriber->port_ref)->lock;
-
-	/* Add subscriber to topology server's subscriber list */
-	spin_lock_bh(&topsrv.lock);
-	list_add(&subscriber->subscriber_list, &topsrv.subscriber_list);
-	spin_unlock_bh(&topsrv.lock);
-
-	/* Unlock server port */
-	server_port_ref = subscriber->port_ref;
-	spin_unlock_bh(subscriber->lock);
-
-	/* Send an ACK- to complete connection handshaking */
-	tipc_send(server_port_ref, 0, NULL, 0);
-
-	/* Handle optional subscription request */
-	if (size != 0) {
-		subscr_conn_msg_event(subscriber, server_port_ref,
-				      buf, data, size);
-	}
+	return (void *)tipc_subscrb_create(conid);
 }
 
-int tipc_subscr_start(void)
+int tipc_topsrv_start(struct net *net)
 {
-	struct tipc_name_seq seq = {TIPC_TOP_SRV, TIPC_TOP_SRV, TIPC_TOP_SRV};
-	int res;
+	struct tipc_net *tn = net_generic(net, tipc_net_id);
+	const char name[] = "topology_server";
+	struct tipc_server *topsrv;
+	struct sockaddr_tipc *saddr;
 
-	spin_lock_init(&topsrv.lock);
-	INIT_LIST_HEAD(&topsrv.subscriber_list);
+	saddr = kzalloc(sizeof(*saddr), GFP_ATOMIC);
+	if (!saddr)
+		return -ENOMEM;
+	saddr->family			= AF_TIPC;
+	saddr->addrtype			= TIPC_ADDR_NAMESEQ;
+	saddr->addr.nameseq.type	= TIPC_TOP_SRV;
+	saddr->addr.nameseq.lower	= TIPC_TOP_SRV;
+	saddr->addr.nameseq.upper	= TIPC_TOP_SRV;
+	saddr->scope			= TIPC_NODE_SCOPE;
 
-	res = tipc_createport(NULL,
-			      TIPC_CRITICAL_IMPORTANCE,
-			      NULL,
-			      NULL,
-			      NULL,
-			      NULL,
-			      subscr_named_msg_event,
-			      NULL,
-			      NULL,
-			      &topsrv.setup_port);
-	if (res)
-		goto failed;
-
-	res = tipc_publish(topsrv.setup_port, TIPC_NODE_SCOPE, &seq);
-	if (res) {
-		tipc_deleteport(topsrv.setup_port);
-		topsrv.setup_port = 0;
-		goto failed;
+	topsrv = kzalloc(sizeof(*topsrv), GFP_ATOMIC);
+	if (!topsrv) {
+		kfree(saddr);
+		return -ENOMEM;
 	}
+	topsrv->net			= net;
+	topsrv->saddr			= saddr;
+	topsrv->imp			= TIPC_CRITICAL_IMPORTANCE;
+	topsrv->type			= SOCK_SEQPACKET;
+	topsrv->max_rcvbuf_size		= sizeof(struct tipc_subscr);
+	topsrv->tipc_conn_recvmsg	= tipc_subscrb_rcv_cb;
+	topsrv->tipc_conn_new		= tipc_subscrb_connect_cb;
+	topsrv->tipc_conn_shutdown	= tipc_subscrb_shutdown_cb;
 
-	return 0;
+	strncpy(topsrv->name, name, strlen(name) + 1);
+	tn->topsrv = topsrv;
+	atomic_set(&tn->subscription_count, 0);
 
-failed:
-	pr_err("Failed to create subscription service\n");
-	return res;
+	return tipc_server_start(topsrv);
 }
 
-void tipc_subscr_stop(void)
+void tipc_topsrv_stop(struct net *net)
 {
-	struct tipc_subscriber *subscriber;
-	struct tipc_subscriber *subscriber_temp;
-	spinlock_t *subscriber_lock;
+	struct tipc_net *tn = net_generic(net, tipc_net_id);
+	struct tipc_server *topsrv = tn->topsrv;
 
-	if (topsrv.setup_port) {
-		tipc_deleteport(topsrv.setup_port);
-		topsrv.setup_port = 0;
-
-		list_for_each_entry_safe(subscriber, subscriber_temp,
-					 &topsrv.subscriber_list,
-					 subscriber_list) {
-			subscriber_lock = subscriber->lock;
-			spin_lock_bh(subscriber_lock);
-			subscr_terminate(subscriber);
-			spin_unlock_bh(subscriber_lock);
-		}
-	}
+	tipc_server_stop(topsrv);
+	kfree(topsrv->saddr);
+	kfree(topsrv);
 }