tipc: Remove prototype code for supporting inter-cluster routing

Eliminates routines and data structures that were intended to allow
TIPC to route messages to other clusters. Currently, TIPC supports only
networks consisting of a single cluster within a single zone, so this
code is unnecessary.

Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

9 files changed, 15 insertions, 543 deletions

diff --git a/net/tipc/addr.h b/net/tipc/addr.h
index a16c6c87208..2490fadd0ca 100644
--- a/net/tipc/addr.h
+++ b/net/tipc/addr.h
@@ -37,21 +37,6 @@
 #ifndef _TIPC_ADDR_H
 #define _TIPC_ADDR_H
 
-static inline u32 own_node(void)
-{
-        return tipc_node(tipc_own_addr);
-}
-
-static inline u32 own_cluster(void)
-{
-        return tipc_cluster(tipc_own_addr);
-}
-
-static inline u32 own_zone(void)
-{
-        return tipc_zone(tipc_own_addr);
-}
-
 static inline int in_own_cluster(u32 addr)
 {
         return !((addr ^ tipc_own_addr) >> 12);
diff --git a/net/tipc/cluster.c b/net/tipc/cluster.c
index 6bc9f07be94..ba6f5bfa0cd 100644
--- a/net/tipc/cluster.c
+++ b/net/tipc/cluster.c
@@ -38,9 +38,6 @@
 #include "cluster.h"
 #include "link.h"
 
-static void tipc_cltr_multicast(struct cluster *c_ptr, struct sk_buff *buf,
-                                u32 lower, u32 upper);
-
 struct tipc_node **tipc_local_nodes = NULL;
 struct tipc_node_map tipc_cltr_bcast_nodes = {0,{0,}};
 
@@ -65,8 +62,7 @@ struct cluster *tipc_cltr_create(u32 addr)
                 return NULL;
         }
 
-        if (in_own_cluster(addr))
-                tipc_local_nodes = c_ptr->nodes;
+        tipc_local_nodes = c_ptr->nodes;
         c_ptr->highest_node = 0;
 
         tipc_net.clusters[1] = c_ptr;
@@ -101,278 +97,6 @@ void tipc_cltr_attach_node(struct cluster *c_ptr, struct tipc_node *n_ptr)
 }
 
 /**
- * tipc_cltr_select_router - select router to a cluster
- *
- * Uses deterministic and fair algorithm.
- */
-
-u32 tipc_cltr_select_router(struct cluster *c_ptr, u32 ref)
-{
-        u32 n_num;
-        u32 ulim = c_ptr->highest_node;
-        u32 mask;
-        u32 tstart;
-
-        assert(!in_own_cluster(c_ptr->addr));
-        if (!ulim)
-                return 0;
-
-        /* Start entry must be random */
-        mask = tipc_max_nodes;
-        while (mask > ulim)
-                mask >>= 1;
-        tstart = ref & mask;
-        n_num = tstart;
-
-        /* Lookup upwards with wrap-around */
-        do {
-                if (tipc_node_is_up(c_ptr->nodes[n_num]))
-                        break;
-        } while (++n_num <= ulim);
-        if (n_num > ulim) {
-                n_num = 1;
-                do {
-                        if (tipc_node_is_up(c_ptr->nodes[n_num]))
-                                break;
-                } while (++n_num < tstart);
-                if (n_num == tstart)
-                        return 0;
-        }
-        assert(n_num <= ulim);
-        return tipc_node_select_router(c_ptr->nodes[n_num], ref);
-}
-
-/**
- * tipc_cltr_select_node - select destination node within a remote cluster
- *
- * Uses deterministic and fair algorithm.
- */
-
-struct tipc_node *tipc_cltr_select_node(struct cluster *c_ptr, u32 selector)
-{
-        u32 n_num;
-        u32 mask = tipc_max_nodes;
-        u32 start_entry;
-
-        assert(!in_own_cluster(c_ptr->addr));
-        if (!c_ptr->highest_node)
-                return NULL;
-
-        /* Start entry must be random */
-        while (mask > c_ptr->highest_node) {
-                mask >>= 1;
-        }
-        start_entry = (selector & mask) ? selector & mask : 1u;
-        assert(start_entry <= c_ptr->highest_node);
-
-        /* Lookup upwards with wrap-around */
-        for (n_num = start_entry; n_num <= c_ptr->highest_node; n_num++) {
-                if (tipc_node_has_active_links(c_ptr->nodes[n_num]))
-                        return c_ptr->nodes[n_num];
-        }
-        for (n_num = 1; n_num < start_entry; n_num++) {
-                if (tipc_node_has_active_links(c_ptr->nodes[n_num]))
-                        return c_ptr->nodes[n_num];
-        }
-        return NULL;
-}
-
-/*
- *    Routing table management: See description in node.c
- */
-
-static struct sk_buff *tipc_cltr_prepare_routing_msg(u32 data_size, u32 dest)
-{
-        u32 size = INT_H_SIZE + data_size;
-        struct sk_buff *buf = tipc_buf_acquire(size);
-        struct tipc_msg *msg;
-
-        if (buf) {
-                msg = buf_msg(buf);
-                memset((char *)msg, 0, size);
-                tipc_msg_init(msg, ROUTE_DISTRIBUTOR, 0, INT_H_SIZE, dest);
-        }
-        return buf;
-}
-
-void tipc_cltr_bcast_new_route(struct cluster *c_ptr, u32 dest,
-                             u32 lower, u32 upper)
-{
-        struct sk_buff *buf = tipc_cltr_prepare_routing_msg(0, c_ptr->addr);
-        struct tipc_msg *msg;
-
-        if (buf) {
-                msg = buf_msg(buf);
-                msg_set_remote_node(msg, dest);
-                msg_set_type(msg, ROUTE_ADDITION);
-                tipc_cltr_multicast(c_ptr, buf, lower, upper);
-        } else {
-                warn("Memory squeeze: broadcast of new route failed\n");
-        }
-}
-
-void tipc_cltr_bcast_lost_route(struct cluster *c_ptr, u32 dest,
-                                u32 lower, u32 upper)
-{
-        struct sk_buff *buf = tipc_cltr_prepare_routing_msg(0, c_ptr->addr);
-        struct tipc_msg *msg;
-
-        if (buf) {
-                msg = buf_msg(buf);
-                msg_set_remote_node(msg, dest);
-                msg_set_type(msg, ROUTE_REMOVAL);
-                tipc_cltr_multicast(c_ptr, buf, lower, upper);
-        } else {
-                warn("Memory squeeze: broadcast of lost route failed\n");
-        }
-}
-
-void tipc_cltr_send_ext_routes(struct cluster *c_ptr, u32 dest)
-{
-        struct sk_buff *buf;
-        struct tipc_msg *msg;
-        u32 highest = c_ptr->highest_node;
-        u32 n_num;
-        int send = 0;
-
-        if (in_own_cluster(c_ptr->addr))
-                return;
-        assert(in_own_cluster(dest));
-        highest = c_ptr->highest_node;
-        buf = tipc_cltr_prepare_routing_msg(highest + 1, c_ptr->addr);
-        if (buf) {
-                msg = buf_msg(buf);
-                msg_set_remote_node(msg, c_ptr->addr);
-                msg_set_type(msg, EXT_ROUTING_TABLE);
-                for (n_num = 1; n_num <= highest; n_num++) {
-                        if (c_ptr->nodes[n_num] &&
-                            tipc_node_has_active_links(c_ptr->nodes[n_num])) {
-                                send = 1;
-                                msg_set_dataoctet(msg, n_num);
-                        }
-                }
-                if (send)
-                        tipc_link_send(buf, dest, dest);
-                else
-                        buf_discard(buf);
-        } else {
-                warn("Memory squeeze: broadcast of external route failed\n");
-        }
-}
-
-void tipc_cltr_recv_routing_table(struct sk_buff *buf)
-{
-        struct tipc_msg *msg = buf_msg(buf);
-        struct cluster *c_ptr;
-        struct tipc_node *n_ptr;
-        unchar *node_table;
-        u32 table_size;
-        u32 router;
-        u32 rem_node = msg_remote_node(msg);
-        u32 z_num;
-        u32 c_num;
-        u32 n_num;
-
-        c_ptr = tipc_cltr_find(rem_node);
-        if (!c_ptr) {
-                c_ptr = tipc_cltr_create(rem_node);
-                if (!c_ptr) {
-                        buf_discard(buf);
-                        return;
-                }
-        }
-
-        node_table = buf->data + msg_hdr_sz(msg);
-        table_size = msg_size(msg) - msg_hdr_sz(msg);
-        router = msg_prevnode(msg);
-        z_num = tipc_zone(rem_node);
-        c_num = tipc_cluster(rem_node);
-
-        switch (msg_type(msg)) {
-        case EXT_ROUTING_TABLE:
-                for (n_num = 1; n_num < table_size; n_num++) {
-                        if (node_table[n_num]) {
-                                u32 addr = tipc_addr(z_num, c_num, n_num);
-                                n_ptr = c_ptr->nodes[n_num];
-                                if (!n_ptr) {
-                                        n_ptr = tipc_node_create(addr);
-                                }
-                                if (n_ptr)
-                                        tipc_node_add_router(n_ptr, router);
-                        }
-                }
-                break;
-        case SLAVE_ROUTING_TABLE:
-                assert(in_own_cluster(c_ptr->addr));
-                break;
-        case ROUTE_ADDITION:
-                assert(!in_own_cluster(c_ptr->addr));
-                n_ptr = c_ptr->nodes[tipc_node(rem_node)];
-                if (!n_ptr)
-                        n_ptr = tipc_node_create(rem_node);
-                if (n_ptr)
-                        tipc_node_add_router(n_ptr, router);
-                break;
-        case ROUTE_REMOVAL:
-                assert(!in_own_cluster(c_ptr->addr));
-                n_ptr = c_ptr->nodes[tipc_node(rem_node)];
-                if (n_ptr)
-                        tipc_node_remove_router(n_ptr, router);
-                break;
-        default:
-                assert(!"Illegal routing manager message received\n");
-        }
-        buf_discard(buf);
-}
-
-void tipc_cltr_remove_as_router(struct cluster *c_ptr, u32 router)
-{
-        u32 n_num;
-
-        if (in_own_cluster(c_ptr->addr))
-                return;
-
-        for (n_num = 1; n_num <= c_ptr->highest_node; n_num++) {
-                if (c_ptr->nodes[n_num]) {
-                        tipc_node_remove_router(c_ptr->nodes[n_num], router);
-                }
-        }
-}
-
-/**
- * tipc_cltr_multicast - multicast message to local nodes
- */
-
-static void tipc_cltr_multicast(struct cluster *c_ptr, struct sk_buff *buf,
-                         u32 lower, u32 upper)
-{
-        struct sk_buff *buf_copy;
-        struct tipc_node *n_ptr;
-        u32 n_num;
-        u32 tstop;
-
-        assert(lower <= upper);
-        assert((lower >= 1) && (lower <= tipc_max_nodes));
-        assert((upper >= 1) && (upper <= tipc_max_nodes));
-        assert(in_own_cluster(c_ptr->addr));
-
-        tstop = c_ptr->highest_node;
-        if (tstop > upper)
-                tstop = upper;
-        for (n_num = lower; n_num <= tstop; n_num++) {
-                n_ptr = c_ptr->nodes[n_num];
-                if (n_ptr && tipc_node_has_active_links(n_ptr)) {
-                        buf_copy = skb_copy(buf, GFP_ATOMIC);
-                        if (buf_copy == NULL)
-                                break;
-                        msg_set_destnode(buf_msg(buf_copy), n_ptr->addr);
-                        tipc_link_send(buf_copy, n_ptr->addr, n_ptr->addr);
-                }
-        }
-        buf_discard(buf);
-}
-
-/**
  * tipc_cltr_broadcast - broadcast message to all nodes within cluster
  */
 
@@ -385,7 +109,6 @@ void tipc_cltr_broadcast(struct sk_buff *buf)
 
         if (tipc_mode == TIPC_NET_MODE) {
                 c_ptr = tipc_cltr_find(tipc_own_addr);
-                assert(in_own_cluster(c_ptr->addr));    /* For now */
 
                 /* Send to nodes */
                 for (n_num = 1; n_num <= c_ptr->highest_node; n_num++) {
diff --git a/net/tipc/cluster.h b/net/tipc/cluster.h
index aa1fd6ab4d1..e4b6e4e2737 100644
--- a/net/tipc/cluster.h
+++ b/net/tipc/cluster.h
@@ -57,20 +57,12 @@ struct cluster {
 extern struct tipc_node **tipc_local_nodes;
 extern struct tipc_node_map tipc_cltr_bcast_nodes;
 
-void tipc_cltr_remove_as_router(struct cluster *c_ptr, u32 router);
-void tipc_cltr_send_ext_routes(struct cluster *c_ptr, u32 dest);
-struct tipc_node *tipc_cltr_select_node(struct cluster *c_ptr, u32 selector);
-u32 tipc_cltr_select_router(struct cluster *c_ptr, u32 ref);
-void tipc_cltr_recv_routing_table(struct sk_buff *buf);
 struct cluster *tipc_cltr_create(u32 addr);
 void tipc_cltr_delete(struct cluster *c_ptr);
 void tipc_cltr_attach_node(struct cluster *c_ptr, struct tipc_node *n_ptr);
 void tipc_cltr_broadcast(struct sk_buff *buf);
 int tipc_cltr_init(void);
 
-void tipc_cltr_bcast_new_route(struct cluster *c_ptr, u32 dest, u32 lo, u32 hi);
-void tipc_cltr_bcast_lost_route(struct cluster *c_ptr, u32 dest, u32 lo, u32 hi);
-
 static inline struct cluster *tipc_cltr_find(u32 addr)
 {
         if (!in_own_cluster(addr))
diff --git a/net/tipc/link.c b/net/tipc/link.c
index cf414cf05e7..671ffd3c0e5 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -1061,7 +1061,7 @@ int tipc_link_send(struct sk_buff *buf, u32 dest, u32 selector)
         int res = -ELINKCONG;
 
         read_lock_bh(&tipc_net_lock);
-        n_ptr = tipc_node_select(dest, selector);
+        n_ptr = tipc_node_find(dest);
         if (n_ptr) {
                 tipc_node_lock(n_ptr);
                 l_ptr = n_ptr->active_links[selector & 1];
@@ -1137,7 +1137,7 @@ int tipc_send_buf_fast(struct sk_buff *buf, u32 destnode)
                 return tipc_port_recv_msg(buf);
 
         read_lock_bh(&tipc_net_lock);
-        n_ptr = tipc_node_select(destnode, selector);
+        n_ptr = tipc_node_find(destnode);
         if (likely(n_ptr)) {
                 tipc_node_lock(n_ptr);
                 l_ptr = n_ptr->active_links[selector];
@@ -1186,7 +1186,7 @@ again:
                         !sender->user_port, &buf);
 
         read_lock_bh(&tipc_net_lock);
-        node = tipc_node_select(destaddr, selector);
+        node = tipc_node_find(destaddr);
         if (likely(node)) {
                 tipc_node_lock(node);
                 l_ptr = node->active_links[selector];
@@ -1376,7 +1376,7 @@ error:
          * Now we have a buffer chain. Select a link and check
          * that packet size is still OK
          */
-        node = tipc_node_select(destaddr, sender->publ.ref & 1);
+        node = tipc_node_find(destaddr);
         if (likely(node)) {
                 tipc_node_lock(node);
                 l_ptr = node->active_links[sender->publ.ref & 1];
@@ -1893,7 +1893,7 @@ deliver:
                                                 continue;
                                         case ROUTE_DISTRIBUTOR:
                                                 tipc_node_unlock(n_ptr);
-                                                tipc_cltr_recv_routing_table(buf);
+                                                buf_discard(buf);
                                                 continue;
                                         case NAME_DISTRIBUTOR:
                                                 tipc_node_unlock(n_ptr);
@@ -2852,7 +2852,6 @@ void tipc_link_set_queue_limits(struct link *l_ptr, u32 window)
         l_ptr->queue_limit[TIPC_HIGH_IMPORTANCE + 4] = 900;
         l_ptr->queue_limit[TIPC_CRITICAL_IMPORTANCE + 4] = 1200;
         l_ptr->queue_limit[CONN_MANAGER] = 1200;
-        l_ptr->queue_limit[ROUTE_DISTRIBUTOR] = 1200;
         l_ptr->queue_limit[CHANGEOVER_PROTOCOL] = 2500;
         l_ptr->queue_limit[NAME_DISTRIBUTOR] = 3000;
         /* FRAGMENT and LAST_FRAGMENT packets */
@@ -3154,7 +3153,7 @@ u32 tipc_link_get_max_pkt(u32 dest, u32 selector)
                 return MAX_MSG_SIZE;
 
         read_lock_bh(&tipc_net_lock);
-        n_ptr = tipc_node_select(dest, selector);
+        n_ptr = tipc_node_find(dest);
         if (n_ptr) {
                 tipc_node_lock(n_ptr);
                 l_ptr = n_ptr->active_links[selector & 1];
diff --git a/net/tipc/msg.h b/net/tipc/msg.h
index c1b6217838e..68b65ef3e74 100644
--- a/net/tipc/msg.h
+++ b/net/tipc/msg.h
@@ -540,7 +540,7 @@ static inline struct tipc_msg *msg_get_wrapped(struct tipc_msg *m)
 #define  MSG_BUNDLER          6
 #define  LINK_PROTOCOL        7
 #define  CONN_MANAGER         8
-#define  ROUTE_DISTRIBUTOR    9
+#define  ROUTE_DISTRIBUTOR    9         /* obsoleted */
 #define  CHANGEOVER_PROTOCOL  10
 #define  NAME_DISTRIBUTOR     11
 #define  MSG_FRAGMENTER       12
@@ -819,11 +819,6 @@ static inline void msg_set_remote_node(struct tipc_msg *m, u32 a)
         msg_set_word(m, msg_hdr_sz(m)/4, a);
 }
 
-static inline void msg_set_dataoctet(struct tipc_msg *m, u32 pos)
-{
-        msg_data(m)[pos + 4] = 1;
-}
-
 /*
  * Segmentation message types
  */
diff --git a/net/tipc/net.c b/net/tipc/net.c
index a25f8bb1e1d..3967f1f6d97 100644
--- a/net/tipc/net.c
+++ b/net/tipc/net.c
@@ -112,48 +112,6 @@
 DEFINE_RWLOCK(tipc_net_lock);
 struct network tipc_net;
 
-struct tipc_node *tipc_net_select_remote_node(u32 addr, u32 ref)
-{
-        struct cluster *c_ptr;
-
-        c_ptr = tipc_net.clusters[1];
-        if (!c_ptr)
-                return NULL;
-        return tipc_cltr_select_node(c_ptr, ref);
-}
-
-u32 tipc_net_select_router(u32 addr, u32 ref)
-{
-        struct cluster *c_ptr;
-
-        c_ptr = tipc_net.clusters[1];
-        if (!c_ptr)
-                return 0;
-        return tipc_cltr_select_router(c_ptr, ref);
-}
-
-void tipc_net_remove_as_router(u32 router)
-{
-        u32 c_num;
-
-        for (c_num = 1; c_num <= tipc_max_clusters; c_num++) {
-                if (!tipc_net.clusters[c_num])
-                        continue;
-                tipc_cltr_remove_as_router(tipc_net.clusters[c_num], router);
-        }
-}
-
-void tipc_net_send_external_routes(u32 dest)
-{
-        u32 c_num;
-
-        for (c_num = 1; c_num <= tipc_max_clusters; c_num++) {
-                if (tipc_net.clusters[c_num])
-                        tipc_cltr_send_ext_routes(tipc_net.clusters[c_num],
-                                                  dest);
-        }
-}
-
 static void net_stop(void)
 {
         u32 c_num;
@@ -225,9 +183,6 @@ void tipc_net_route_msg(struct sk_buff *buf)
                         return;
                 }
                 switch (msg_user(msg)) {
-                case ROUTE_DISTRIBUTOR:
-                        tipc_cltr_recv_routing_table(buf);
-                        break;
                 case NAME_DISTRIBUTOR:
                         tipc_named_recv(buf);
                         break;
diff --git a/net/tipc/net.h b/net/tipc/net.h
index 786c9400747..6e402d9b33e 100644
--- a/net/tipc/net.h
+++ b/net/tipc/net.h
@@ -54,11 +54,7 @@ struct network {
 extern struct network tipc_net;
 extern rwlock_t tipc_net_lock;
 
-void tipc_net_remove_as_router(u32 router);
-void tipc_net_send_external_routes(u32 dest);
 void tipc_net_route_msg(struct sk_buff *buf);
-struct tipc_node *tipc_net_select_remote_node(u32 addr, u32 ref);
-u32 tipc_net_select_router(u32 addr, u32 ref);
 
 int tipc_net_start(u32 addr);
 void tipc_net_stop(void);
diff --git a/net/tipc/node.c b/net/tipc/node.c
index 8ffbdb33b2c..c47cc69eb57 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -95,11 +95,10 @@ struct tipc_node *tipc_node_create(u32 addr)
         }
 
         n_ptr->addr = addr;
-                spin_lock_init(&n_ptr->lock);
+        spin_lock_init(&n_ptr->lock);
         INIT_LIST_HEAD(&n_ptr->nsub);
         n_ptr->owner = c_ptr;
         tipc_cltr_attach_node(c_ptr, n_ptr);
-        n_ptr->last_router = -1;
 
         /* Insert node into ordered list */
         for (curr_node = &tipc_nodes; *curr_node;
@@ -229,14 +228,9 @@ int tipc_node_has_redundant_links(struct tipc_node *n_ptr)
         return n_ptr->working_links > 1;
 }
 
-static int tipc_node_has_active_routes(struct tipc_node *n_ptr)
-{
-        return n_ptr && (n_ptr->last_router >= 0);
-}
-
 int tipc_node_is_up(struct tipc_node *n_ptr)
 {
-        return tipc_node_has_active_links(n_ptr) || tipc_node_has_active_routes(n_ptr);
+        return tipc_node_has_active_links(n_ptr);
 }
 
 struct tipc_node *tipc_node_attach_link(struct link *l_ptr)
@@ -323,36 +317,17 @@ void tipc_node_detach_link(struct tipc_node *n_ptr, struct link *l_ptr)
 
 static void node_established_contact(struct tipc_node *n_ptr)
 {
-        struct cluster *c_ptr;
-
         dbg("node_established_contact:-> %x\n", n_ptr->addr);
-        if (!tipc_node_has_active_routes(n_ptr) && in_own_cluster(n_ptr->addr)) {
-                tipc_k_signal((Handler)tipc_named_node_up, n_ptr->addr);
-        }
+        tipc_k_signal((Handler)tipc_named_node_up, n_ptr->addr);
 
         /* Syncronize broadcast acks */
         n_ptr->bclink.acked = tipc_bclink_get_last_sent();
 
-        if (!in_own_cluster(n_ptr->addr)) {
-                /* Usage case 1 (see above) */
-                c_ptr = tipc_cltr_find(tipc_own_addr);
-                if (!c_ptr)
-                        c_ptr = tipc_cltr_create(tipc_own_addr);
-                if (c_ptr)
-                        tipc_cltr_bcast_new_route(c_ptr, n_ptr->addr, 1,
-                                                  tipc_max_nodes);
-                return;
-        }
-
-        c_ptr = n_ptr->owner;
         if (n_ptr->bclink.supported) {
                 tipc_nmap_add(&tipc_cltr_bcast_nodes, n_ptr->addr);
                 if (n_ptr->addr < tipc_own_addr)
                         tipc_own_tag++;
         }
-
-        /* Case 3 (see above) */
-        tipc_net_send_external_routes(n_ptr->addr);
 }
 
 static void node_cleanup_finished(unsigned long node_addr)
@@ -371,7 +346,6 @@ static void node_cleanup_finished(unsigned long node_addr)
 
 static void node_lost_contact(struct tipc_node *n_ptr)
 {
-        struct cluster *c_ptr;
         struct tipc_node_subscr *ns, *tns;
         char addr_string[16];
         u32 i;
@@ -392,23 +366,11 @@ static void node_lost_contact(struct tipc_node *n_ptr)
         }
 
         /* Update routing tables */
-        if (!in_own_cluster(n_ptr->addr)) {
-                /* Case 4 (see above) */
-                c_ptr = tipc_cltr_find(tipc_own_addr);
-                tipc_cltr_bcast_lost_route(c_ptr, n_ptr->addr, 1,
-                                           tipc_max_nodes);
-        } else {
-                /* Case 5 (see above) */
-                c_ptr = tipc_cltr_find(n_ptr->addr);
-                if (n_ptr->bclink.supported) {
-                        tipc_nmap_remove(&tipc_cltr_bcast_nodes, n_ptr->addr);
-                        if (n_ptr->addr < tipc_own_addr)
-                                tipc_own_tag--;
-                }
-                tipc_net_remove_as_router(n_ptr->addr);
+        if (n_ptr->bclink.supported) {
+                tipc_nmap_remove(&tipc_cltr_bcast_nodes, n_ptr->addr);
+                if (n_ptr->addr < tipc_own_addr)
+                        tipc_own_tag--;
         }
-        if (tipc_node_has_active_routes(n_ptr))
-                return;
 
         info("Lost contact with %s\n",
              tipc_addr_string_fill(addr_string, n_ptr->addr));
@@ -437,120 +399,6 @@ static void node_lost_contact(struct tipc_node *n_ptr)
         tipc_k_signal((Handler)node_cleanup_finished, n_ptr->addr);
 }
 
-/**
- * tipc_node_select_next_hop - find the next-hop node for a message
- *
- * Called by when cluster local lookup has failed.
- */
-
-struct tipc_node *tipc_node_select_next_hop(u32 addr, u32 selector)
-{
-        struct tipc_node *n_ptr;
-        u32 router_addr;
-
-        if (!tipc_addr_domain_valid(addr))
-                return NULL;
-
-        /* Look for direct link to destination processsor */
-        n_ptr = tipc_node_find(addr);
-        if (n_ptr && tipc_node_has_active_links(n_ptr))
-                return n_ptr;
-
-        /* Cluster local system nodes *must* have direct links */
-        if (in_own_cluster(addr))
-                return NULL;
-
-        /* Look for cluster local router with direct link to node */
-        router_addr = tipc_node_select_router(n_ptr, selector);
-        if (router_addr)
-                return tipc_node_select(router_addr, selector);
-
-        /* Inter zone/cluster -- find any direct link to remote cluster */
-        addr = tipc_addr(tipc_zone(addr), tipc_cluster(addr), 0);
-        n_ptr = tipc_net_select_remote_node(addr, selector);
-        if (n_ptr && tipc_node_has_active_links(n_ptr))
-                return n_ptr;
-
-        /* Last resort -- look for any router to anywhere in remote zone */
-        router_addr =  tipc_net_select_router(addr, selector);
-        if (router_addr)
-                return tipc_node_select(router_addr, selector);
-
-        return NULL;
-}
-
-/**
- * tipc_node_select_router - select router to reach specified node
- *
- * Uses a deterministic and fair algorithm for selecting router node.
- */
-
-u32 tipc_node_select_router(struct tipc_node *n_ptr, u32 ref)
-{
-        u32 ulim;
-        u32 mask;
-        u32 start;
-        u32 r;
-
-        if (!n_ptr)
-                return 0;
-
-        if (n_ptr->last_router < 0)
-                return 0;
-        ulim = ((n_ptr->last_router + 1) * 32) - 1;
-
-        /* Start entry must be random */
-        mask = tipc_max_nodes;
-        while (mask > ulim)
-                mask >>= 1;
-        start = ref & mask;
-        r = start;
-
-        /* Lookup upwards with wrap-around */
-        do {
-                if (((n_ptr->routers[r / 32]) >> (r % 32)) & 1)
-                        break;
-        } while (++r <= ulim);
-        if (r > ulim) {
-                r = 1;
-                do {
-                        if (((n_ptr->routers[r / 32]) >> (r % 32)) & 1)
-                                break;
-                } while (++r < start);
-                assert(r != start);
-        }
-        assert(r && (r <= ulim));
-        return tipc_addr(own_zone(), own_cluster(), r);
-}
-
-void tipc_node_add_router(struct tipc_node *n_ptr, u32 router)
-{
-        u32 r_num = tipc_node(router);
-
-        n_ptr->routers[r_num / 32] =
-                ((1 << (r_num % 32)) | n_ptr->routers[r_num / 32]);
-        n_ptr->last_router = tipc_max_nodes / 32;
-        while ((--n_ptr->last_router >= 0) &&
-               !n_ptr->routers[n_ptr->last_router]);
-}
-
-void tipc_node_remove_router(struct tipc_node *n_ptr, u32 router)
-{
-        u32 r_num = tipc_node(router);
-
-        if (n_ptr->last_router < 0)
-                return;         /* No routes */
-
-        n_ptr->routers[r_num / 32] =
-                ((~(1 << (r_num % 32))) & (n_ptr->routers[r_num / 32]));
-        n_ptr->last_router = tipc_max_nodes / 32;
-        while ((--n_ptr->last_router >= 0) &&
-               !n_ptr->routers[n_ptr->last_router]);
-
-        if (!tipc_node_is_up(n_ptr))
-                node_lost_contact(n_ptr);
-}
-
 struct sk_buff *tipc_node_get_nodes(const void *req_tlv_area, int req_tlv_space)
 {
         u32 domain;
diff --git a/net/tipc/node.h b/net/tipc/node.h
index 7bfaf5e8c20..3abaaa24c77 100644
--- a/net/tipc/node.h
+++ b/net/tipc/node.h
@@ -54,8 +54,6 @@
  * @cleanup_required: non-zero if cleaning up after a prior loss of contact
  * @link_cnt: number of links to node
  * @permit_changeover: non-zero if node has redundant links to this system
- * @routers: bitmap (used for multicluster communication)
- * @last_router: (used for multicluster communication)
  * @bclink: broadcast-related info
  *    @supported: non-zero if node supports TIPC b'cast capability
  *    @acked: sequence # of last outbound b'cast message acknowledged by node
@@ -80,8 +78,6 @@ struct tipc_node {
         int working_links;
         int cleanup_required;
         int permit_changeover;
-        u32 routers[512/32];
-        int last_router;
         struct {
                 int supported;
                 u32 acked;
@@ -105,11 +101,7 @@ void tipc_node_link_down(struct tipc_node *n_ptr, struct link *l_ptr);
 void tipc_node_link_up(struct tipc_node *n_ptr, struct link *l_ptr);
 int tipc_node_has_active_links(struct tipc_node *n_ptr);
 int tipc_node_has_redundant_links(struct tipc_node *n_ptr);
-u32 tipc_node_select_router(struct tipc_node *n_ptr, u32 ref);
-struct tipc_node *tipc_node_select_next_hop(u32 addr, u32 selector);
 int tipc_node_is_up(struct tipc_node *n_ptr);
-void tipc_node_add_router(struct tipc_node *n_ptr, u32 router);
-void tipc_node_remove_router(struct tipc_node *n_ptr, u32 router);
 struct sk_buff *tipc_node_get_links(const void *req_tlv_area, int req_tlv_space);
 struct sk_buff *tipc_node_get_nodes(const void *req_tlv_area, int req_tlv_space);
 
@@ -117,22 +109,9 @@ static inline struct tipc_node *tipc_node_find(u32 addr)
 {
         if (likely(in_own_cluster(addr)))
                 return tipc_local_nodes[tipc_node(addr)];
-        else if (tipc_addr_domain_valid(addr)) {
-                struct cluster *c_ptr = tipc_cltr_find(addr);
-
-                if (c_ptr)
-                        return c_ptr->nodes[tipc_node(addr)];
-        }
         return NULL;
 }
 
-static inline struct tipc_node *tipc_node_select(u32 addr, u32 selector)
-{
-        if (likely(in_own_cluster(addr)))
-                return tipc_local_nodes[tipc_node(addr)];
-        return tipc_node_select_next_hop(addr, selector);
-}
-
 static inline void tipc_node_lock(struct tipc_node *n_ptr)
 {
         spin_lock_bh(&n_ptr->lock);