tipc: simplify resetting and disabling of bearers

Since commit 4b475e3f2f8e4e241de101c8240f1d74d0470494
("tipc: eliminate delayed link deletion at link failover") the extra
boolean parameter "shutting_down" is not any longer needed for the
functions bearer_disable() and tipc_link_delete_list().

Furhermore, the function tipc_link_reset_links(), called from
bearer_reset()  is now unnecessary. We can just as well delete
all the links, as we do in bearer_disable(), and start over with
creating new links.

This commit introduces those changes.

Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 10 insertions, 32 deletions

diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c
index 99c0bd43feed..00bc0e620532 100644
--- a/net/tipc/bearer.c
+++ b/net/tipc/bearer.c
@@ -71,8 +71,7 @@ static const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = {
         [TIPC_NLA_MEDIA_PROP]           = { .type = NLA_NESTED }
 };
 
-static void bearer_disable(struct net *net, struct tipc_bearer *b_ptr,
-                           bool shutting_down);
+static void bearer_disable(struct net *net, struct tipc_bearer *b_ptr);
 
 /**
  * tipc_media_find - locates specified media object by name
@@ -324,7 +323,7 @@ restart:
 
         res = tipc_disc_create(net, b_ptr, &b_ptr->bcast_addr);
         if (res) {
-                bearer_disable(net, b_ptr, false);
+                bearer_disable(net, b_ptr);
                 pr_warn("Bearer <%s> rejected, discovery object creation failed\n",
                         name);
                 return -EINVAL;
@@ -344,7 +343,7 @@ restart:
 static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b_ptr)
 {
         pr_info("Resetting bearer <%s>\n", b_ptr->name);
-        tipc_link_reset_list(net, b_ptr->identity);
+        tipc_link_delete_list(net, b_ptr->identity);
         tipc_disc_reset(net, b_ptr);
         return 0;
 }
@@ -354,8 +353,7 @@ static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b_ptr)
  *
  * Note: This routine assumes caller holds RTNL lock.
  */
-static void bearer_disable(struct net *net, struct tipc_bearer *b_ptr,
-                           bool shutting_down)
+static void bearer_disable(struct net *net, struct tipc_bearer *b_ptr)
 {
         struct tipc_net *tn = net_generic(net, tipc_net_id);
         u32 i;
@@ -363,7 +361,7 @@ static void bearer_disable(struct net *net, struct tipc_bearer *b_ptr,
         pr_info("Disabling bearer <%s>\n", b_ptr->name);
         b_ptr->media->disable_media(b_ptr);
 
-        tipc_link_delete_list(net, b_ptr->identity, shutting_down);
+        tipc_link_delete_list(net, b_ptr->identity);
         if (b_ptr->link_req)
                 tipc_disc_delete(b_ptr->link_req);
 
@@ -541,7 +539,7 @@ static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
                 break;
         case NETDEV_UNREGISTER:
         case NETDEV_CHANGENAME:
-                bearer_disable(dev_net(dev), b_ptr, false);
+                bearer_disable(dev_net(dev), b_ptr);
                 break;
         }
         return NOTIFY_OK;
@@ -583,7 +581,7 @@ void tipc_bearer_stop(struct net *net)
         for (i = 0; i < MAX_BEARERS; i++) {
                 b_ptr = rtnl_dereference(tn->bearer_list[i]);
                 if (b_ptr) {
-                        bearer_disable(net, b_ptr, true);
+                        bearer_disable(net, b_ptr);
                         tn->bearer_list[i] = NULL;
                 }
         }
@@ -747,7 +745,7 @@ int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
                 return -EINVAL;
         }
 
-        bearer_disable(net, bearer, false);
+        bearer_disable(net, bearer);
         rtnl_unlock();
 
         return 0;
diff --git a/net/tipc/link.c b/net/tipc/link.c
index 374d52335168..266dbc6a34c1 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -311,8 +311,7 @@ void tipc_link_delete(struct tipc_link *l)
         tipc_link_put(l);
 }
 
-void tipc_link_delete_list(struct net *net, unsigned int bearer_id,
-                           bool shutting_down)
+void tipc_link_delete_list(struct net *net, unsigned int bearer_id)
 {
         struct tipc_net *tn = net_generic(net, tipc_net_id);
         struct tipc_link *link;
@@ -476,23 +475,6 @@ void tipc_link_reset(struct tipc_link *l_ptr)
         link_reset_statistics(l_ptr);
 }
 
-void tipc_link_reset_list(struct net *net, unsigned int bearer_id)
-{
-        struct tipc_net *tn = net_generic(net, tipc_net_id);
-        struct tipc_link *l_ptr;
-        struct tipc_node *n_ptr;
-
-        rcu_read_lock();
-        list_for_each_entry_rcu(n_ptr, &tn->node_list, list) {
-                tipc_node_lock(n_ptr);
-                l_ptr = n_ptr->links[bearer_id];
-                if (l_ptr)
-                        tipc_link_reset(l_ptr);
-                tipc_node_unlock(n_ptr);
-        }
-        rcu_read_unlock();
-}
-
 static void link_activate(struct tipc_link *link)
 {
         struct tipc_node *node = link->owner;
diff --git a/net/tipc/link.h b/net/tipc/link.h
index b5b4e3554d4e..dc27bb62b1f5 100644
--- a/net/tipc/link.h
+++ b/net/tipc/link.h
@@ -213,8 +213,7 @@ struct tipc_link *tipc_link_create(struct tipc_node *n_ptr,
                               struct tipc_bearer *b_ptr,
                               const struct tipc_media_addr *media_addr);
 void tipc_link_delete(struct tipc_link *link);
-void tipc_link_delete_list(struct net *net, unsigned int bearer_id,
-                           bool shutting_down);
+void tipc_link_delete_list(struct net *net, unsigned int bearer_id);
 void tipc_link_failover_send_queue(struct tipc_link *l_ptr);
 void tipc_link_dup_queue_xmit(struct tipc_link *l_ptr, struct tipc_link *dest);
 void tipc_link_reset_fragments(struct tipc_link *l_ptr);
@@ -223,7 +222,6 @@ int tipc_link_is_active(struct tipc_link *l_ptr);
 void tipc_link_purge_queues(struct tipc_link *l_ptr);
 void tipc_link_reset_all(struct tipc_node *node);
 void tipc_link_reset(struct tipc_link *l_ptr);
-void tipc_link_reset_list(struct net *net, unsigned int bearer_id);
 int tipc_link_xmit_skb(struct net *net, struct sk_buff *skb, u32 dest,
                        u32 selector);
 int tipc_link_xmit(struct net *net, struct sk_buff_head *list, u32 dest,