tipc: eliminate function tipc_link_activate()

The function tipc_link_activate() is redundant, since it mostly performs
settings that have already been done in a preceding tipc_link_reset().

There are three exceptions to this:
- The actual state change to TIPC_LINK_WORKING. This should anyway be done
  in the FSM, and not in a separate function.
- Registration of the link with the bearer. This should be done by the
  node, since we don't want the link to have any knowledge about its
  specific bearer.
- Call to tipc_node_link_up() for user access registration. With the new
  role distribution between link aggregation and link level this becomes
  the wrong call order; tipc_node_link_up() should instead be called
  directly as a result of a TIPC_LINK_UP event, hence by the node itself.

This commit implements those changes.

Tested-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, 8 insertions, 16 deletions

diff --git a/net/tipc/link.c b/net/tipc/link.c
index cc40aa6eb66c..05837ba7b68c 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -228,6 +228,8 @@ struct tipc_link *tipc_link_create(struct tipc_node *n_ptr,
         l_ptr->peer_session = WILDCARD_SESSION;
         l_ptr->bearer_id = b_ptr->identity;
         l_ptr->tolerance = b_ptr->tolerance;
+        l_ptr->snd_nxt = 1;
+        l_ptr->rcv_nxt = 1;
         l_ptr->state = TIPC_LINK_RESETTING;
 
         l_ptr->pmsg = (struct tipc_msg *)&l_ptr->proto_msg;
@@ -376,6 +378,7 @@ static int tipc_link_fsm_evt(struct tipc_link *l, int evt,
                         pl = node_active_link(l->owner, 0);
                         if (pl && link_probing(pl))
                                 break;
+                        l->state = TIPC_LINK_WORKING;
                         actions |= LINK_ACTIVATE;
                         if (!l->owner->working_links)
                                 actions |= SND_BCAST_SYNC;
@@ -398,6 +401,7 @@ static int tipc_link_fsm_evt(struct tipc_link *l, int evt,
                         pl = node_active_link(l->owner, 0);
                         if (pl && link_probing(pl))
                                 break;
+                        l->state = TIPC_LINK_WORKING;
                         actions |= LINK_ACTIVATE;
                         if (!l->owner->working_links)
                                 actions |= SND_BCAST_SYNC;
@@ -639,19 +643,6 @@ void tipc_link_reset(struct tipc_link *l_ptr)
         link_reset_statistics(l_ptr);
 }
 
-void tipc_link_activate(struct tipc_link *link)
-{
-        struct tipc_node *node = link->owner;
-
-        link->rcv_nxt = 1;
-        link->stats.recv_info = 1;
-        link->silent_intv_cnt = 0;
-        link->state = TIPC_LINK_WORKING;
-        link->exec_mode = TIPC_LINK_OPEN;
-        tipc_node_link_up(node, link->bearer_id);
-        tipc_bearer_add_dest(node->net, link->bearer_id, link->addr);
-}
-
 /**
  * __tipc_link_xmit(): same as tipc_link_xmit, but destlink is known & locked
  * @link: link to use
diff --git a/net/tipc/link.h b/net/tipc/link.h
index 37cfd7d7bf7d..279196d6baac 100644
--- a/net/tipc/link.h
+++ b/net/tipc/link.h
@@ -223,7 +223,6 @@ void tipc_link_purge_queues(struct tipc_link *l_ptr);
 void tipc_link_purge_backlog(struct tipc_link *l);
 void tipc_link_reset_all(struct tipc_node *node);
 void tipc_link_reset(struct tipc_link *l_ptr);
-void tipc_link_activate(struct tipc_link *link);
 int __tipc_link_xmit(struct net *net, struct tipc_link *link,
                      struct sk_buff_head *list);
 int tipc_link_xmit(struct tipc_link *link,      struct sk_buff_head *list,
diff --git a/net/tipc/node.c b/net/tipc/node.c
index e92f84afbf95..558df25a7fc6 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -295,11 +295,13 @@ void tipc_node_link_up(struct tipc_node *n, int bearer_id)
         n->action_flags |= TIPC_NOTIFY_LINK_UP;
         n->link_id = l->peer_bearer_id << 16 | l->bearer_id;
 
+        tipc_bearer_add_dest(n->net, bearer_id, n->addr);
+
         pr_debug("Established link <%s> on network plane %c\n",
                  l->name, l->net_plane);
 
         /* No active links ? => take both active slots */
-        if (*slot0 < 0) {
+        if (!tipc_node_is_up(n)) {
                 *slot0 = bearer_id;
                 *slot1 = bearer_id;
                 node_established_contact(n);
@@ -896,7 +898,7 @@ void tipc_rcv(struct net *net, struct sk_buff *skb, struct tipc_bearer *b)
         rc = tipc_link_rcv(l, skb, &xmitq);
 
         if (unlikely(rc & TIPC_LINK_UP_EVT))
-                tipc_link_activate(l);
+                tipc_node_link_up(n, bearer_id);
         if (unlikely(rc & TIPC_LINK_DOWN_EVT))
                 tipc_link_reset(l);
         skb = NULL;