1 files changed, 214 insertions, 290 deletions

diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c
index 96ceefeb9daf..3e41704832de 100644
--- a/net/tipc/bcast.c
+++ b/net/tipc/bcast.c
@@ -1,7 +1,7 @@
 /*
  * net/tipc/bcast.c: TIPC broadcast code
  *
- * Copyright (c) 2004-2006, 2014, Ericsson AB
+ * Copyright (c) 2004-2006, 2014-2015, Ericsson AB
  * Copyright (c) 2004, Intel Corporation.
  * Copyright (c) 2005, 2010-2011, Wind River Systems
  * All rights reserved.
@@ -35,77 +35,14 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include "core.h"
-#include "link.h"
 #include "socket.h"
 #include "msg.h"
 #include "bcast.h"
 #include "name_distr.h"
+#include "core.h"
 
 #define MAX_PKT_DEFAULT_MCAST   1500    /* bcast link max packet size (fixed) */
 #define BCLINK_WIN_DEFAULT      20      /* bcast link window size (default) */
-#define BCBEARER                MAX_BEARERS
-
-/**
- * struct tipc_bcbearer_pair - a pair of bearers used by broadcast link
- * @primary: pointer to primary bearer
- * @secondary: pointer to secondary bearer
- *
- * Bearers must have same priority and same set of reachable destinations
- * to be paired.
- */
-
-struct tipc_bcbearer_pair {
-        struct tipc_bearer *primary;
-        struct tipc_bearer *secondary;
-};
-
-/**
- * struct tipc_bcbearer - bearer used by broadcast link
- * @bearer: (non-standard) broadcast bearer structure
- * @media: (non-standard) broadcast media structure
- * @bpairs: array of bearer pairs
- * @bpairs_temp: temporary array of bearer pairs used by tipc_bcbearer_sort()
- * @remains: temporary node map used by tipc_bcbearer_send()
- * @remains_new: temporary node map used tipc_bcbearer_send()
- *
- * Note: The fields labelled "temporary" are incorporated into the bearer
- * to avoid consuming potentially limited stack space through the use of
- * large local variables within multicast routines.  Concurrent access is
- * prevented through use of the spinlock "bclink_lock".
- */
-struct tipc_bcbearer {
-        struct tipc_bearer bearer;
-        struct tipc_media media;
-        struct tipc_bcbearer_pair bpairs[MAX_BEARERS];
-        struct tipc_bcbearer_pair bpairs_temp[TIPC_MAX_LINK_PRI + 1];
-        struct tipc_node_map remains;
-        struct tipc_node_map remains_new;
-};
-
-/**
- * struct tipc_bclink - link used for broadcast messages
- * @lock: spinlock governing access to structure
- * @link: (non-standard) broadcast link structure
- * @node: (non-standard) node structure representing b'cast link's peer node
- * @flags: represent bclink states
- * @bcast_nodes: map of broadcast-capable nodes
- * @retransmit_to: node that most recently requested a retransmit
- *
- * Handles sequence numbering, fragmentation, bundling, etc.
- */
-struct tipc_bclink {
-        spinlock_t lock;
-        struct tipc_link link;
-        struct tipc_node node;
-        unsigned int flags;
-        struct tipc_node_map bcast_nodes;
-        struct tipc_node *retransmit_to;
-};
-
-static struct tipc_bcbearer *bcbearer;
-static struct tipc_bclink *bclink;
-static struct tipc_link *bcl;
 
 const char tipc_bclink_name[] = "broadcast-link";
 
@@ -115,38 +52,50 @@ static void tipc_nmap_diff(struct tipc_node_map *nm_a,
 static void tipc_nmap_add(struct tipc_node_map *nm_ptr, u32 node);
 static void tipc_nmap_remove(struct tipc_node_map *nm_ptr, u32 node);
 
-static void tipc_bclink_lock(void)
+static void tipc_bclink_lock(struct net *net)
 {
-        spin_lock_bh(&bclink->lock);
+        struct tipc_net *tn = net_generic(net, tipc_net_id);
+
+        spin_lock_bh(&tn->bclink->lock);
 }
 
-static void tipc_bclink_unlock(void)
+static void tipc_bclink_unlock(struct net *net)
 {
+        struct tipc_net *tn = net_generic(net, tipc_net_id);
         struct tipc_node *node = NULL;
 
-        if (likely(!bclink->flags)) {
-                spin_unlock_bh(&bclink->lock);
+        if (likely(!tn->bclink->flags)) {
+                spin_unlock_bh(&tn->bclink->lock);
                 return;
         }
 
-        if (bclink->flags & TIPC_BCLINK_RESET) {
-                bclink->flags &= ~TIPC_BCLINK_RESET;
-                node = tipc_bclink_retransmit_to();
+        if (tn->bclink->flags & TIPC_BCLINK_RESET) {
+                tn->bclink->flags &= ~TIPC_BCLINK_RESET;
+                node = tipc_bclink_retransmit_to(net);
         }
-        spin_unlock_bh(&bclink->lock);
+        spin_unlock_bh(&tn->bclink->lock);
 
         if (node)
                 tipc_link_reset_all(node);
 }
 
+void tipc_bclink_input(struct net *net)
+{
+        struct tipc_net *tn = net_generic(net, tipc_net_id);
+
+        tipc_sk_mcast_rcv(net, &tn->bclink->arrvq, &tn->bclink->inputq);
+}
+
 uint  tipc_bclink_get_mtu(void)
 {
         return MAX_PKT_DEFAULT_MCAST;
 }
 
-void tipc_bclink_set_flags(unsigned int flags)
+void tipc_bclink_set_flags(struct net *net, unsigned int flags)
 {
-        bclink->flags |= flags;
+        struct tipc_net *tn = net_generic(net, tipc_net_id);
+
+        tn->bclink->flags |= flags;
 }
 
 static u32 bcbuf_acks(struct sk_buff *buf)
@@ -164,31 +113,40 @@ static void bcbuf_decr_acks(struct sk_buff *buf)
         bcbuf_set_acks(buf, bcbuf_acks(buf) - 1);
 }
 
-void tipc_bclink_add_node(u32 addr)
+void tipc_bclink_add_node(struct net *net, u32 addr)
 {
-        tipc_bclink_lock();
-        tipc_nmap_add(&bclink->bcast_nodes, addr);
-        tipc_bclink_unlock();
+        struct tipc_net *tn = net_generic(net, tipc_net_id);
+
+        tipc_bclink_lock(net);
+        tipc_nmap_add(&tn->bclink->bcast_nodes, addr);
+        tipc_bclink_unlock(net);
 }
 
-void tipc_bclink_remove_node(u32 addr)
+void tipc_bclink_remove_node(struct net *net, u32 addr)
 {
-        tipc_bclink_lock();
-        tipc_nmap_remove(&bclink->bcast_nodes, addr);
-        tipc_bclink_unlock();
+        struct tipc_net *tn = net_generic(net, tipc_net_id);
+
+        tipc_bclink_lock(net);
+        tipc_nmap_remove(&tn->bclink->bcast_nodes, addr);
+        tipc_bclink_unlock(net);
 }
 
-static void bclink_set_last_sent(void)
+static void bclink_set_last_sent(struct net *net)
 {
+        struct tipc_net *tn = net_generic(net, tipc_net_id);
+        struct tipc_link *bcl = tn->bcl;
+
         if (bcl->next_out)
                 bcl->fsm_msg_cnt = mod(buf_seqno(bcl->next_out) - 1);
         else
                 bcl->fsm_msg_cnt = mod(bcl->next_out_no - 1);
 }
 
-u32 tipc_bclink_get_last_sent(void)
+u32 tipc_bclink_get_last_sent(struct net *net)
 {
-        return bcl->fsm_msg_cnt;
+        struct tipc_net *tn = net_generic(net, tipc_net_id);
+
+        return tn->bcl->fsm_msg_cnt;
 }
 
 static void bclink_update_last_sent(struct tipc_node *node, u32 seqno)
@@ -203,9 +161,11 @@ static void bclink_update_last_sent(struct tipc_node *node, u32 seqno)
  *
  * Called with bclink_lock locked
  */
-struct tipc_node *tipc_bclink_retransmit_to(void)
+struct tipc_node *tipc_bclink_retransmit_to(struct net *net)
 {
-        return bclink->retransmit_to;
+        struct tipc_net *tn = net_generic(net, tipc_net_id);
+
+        return tn->bclink->retransmit_to;
 }
 
 /**
@@ -215,15 +175,17 @@ struct tipc_node *tipc_bclink_retransmit_to(void)
  *
  * Called with bclink_lock locked
  */
-static void bclink_retransmit_pkt(u32 after, u32 to)
+static void bclink_retransmit_pkt(struct tipc_net *tn, u32 after, u32 to)
 {
         struct sk_buff *skb;
+        struct tipc_link *bcl = tn->bcl;
 
         skb_queue_walk(&bcl->outqueue, skb) {
-                if (more(buf_seqno(skb), after))
+                if (more(buf_seqno(skb), after)) {
+                        tipc_link_retransmit(bcl, skb, mod(to - after));
                         break;
+                }
         }
-        tipc_link_retransmit(bcl, skb, mod(to - after));
 }
 
 /**
@@ -231,13 +193,11 @@ static void bclink_retransmit_pkt(u32 after, u32 to)
  *
  * Called with no locks taken
  */
-void tipc_bclink_wakeup_users(void)
+void tipc_bclink_wakeup_users(struct net *net)
 {
-        struct sk_buff *skb;
-
-        while ((skb = skb_dequeue(&bclink->link.waiting_sks)))
-                tipc_sk_rcv(skb);
+        struct tipc_net *tn = net_generic(net, tipc_net_id);
 
+        tipc_sk_rcv(net, &tn->bclink->link.wakeupq);
 }
 
 /**
@@ -252,10 +212,12 @@ void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked)
         struct sk_buff *skb, *tmp;
         struct sk_buff *next;
         unsigned int released = 0;
+        struct net *net = n_ptr->net;
+        struct tipc_net *tn = net_generic(net, tipc_net_id);
 
-        tipc_bclink_lock();
+        tipc_bclink_lock(net);
         /* Bail out if tx queue is empty (no clean up is required) */
-        skb = skb_peek(&bcl->outqueue);
+        skb = skb_peek(&tn->bcl->outqueue);
         if (!skb)
                 goto exit;
 
@@ -266,43 +228,43 @@ void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked)
                  * acknowledge sent messages only (if other nodes still exist)
                  * or both sent and unsent messages (otherwise)
                  */
-                if (bclink->bcast_nodes.count)
-                        acked = bcl->fsm_msg_cnt;
+                if (tn->bclink->bcast_nodes.count)
+                        acked = tn->bcl->fsm_msg_cnt;
                 else
-                        acked = bcl->next_out_no;
+                        acked = tn->bcl->next_out_no;
         } else {
                 /*
                  * Bail out if specified sequence number does not correspond
                  * to a message that has been sent and not yet acknowledged
                  */
                 if (less(acked, buf_seqno(skb)) ||
-                    less(bcl->fsm_msg_cnt, acked) ||
+                    less(tn->bcl->fsm_msg_cnt, acked) ||
                     less_eq(acked, n_ptr->bclink.acked))
                         goto exit;
         }
 
         /* Skip over packets that node has previously acknowledged */
-        skb_queue_walk(&bcl->outqueue, skb) {
+        skb_queue_walk(&tn->bcl->outqueue, skb) {
                 if (more(buf_seqno(skb), n_ptr->bclink.acked))
                         break;
         }
 
         /* Update packets that node is now acknowledging */
-        skb_queue_walk_from_safe(&bcl->outqueue, skb, tmp) {
+        skb_queue_walk_from_safe(&tn->bcl->outqueue, skb, tmp) {
                 if (more(buf_seqno(skb), acked))
                         break;
 
-                next = tipc_skb_queue_next(&bcl->outqueue, skb);
-                if (skb != bcl->next_out) {
+                next = tipc_skb_queue_next(&tn->bcl->outqueue, skb);
+                if (skb != tn->bcl->next_out) {
                         bcbuf_decr_acks(skb);
                 } else {
                         bcbuf_set_acks(skb, 0);
-                        bcl->next_out = next;
-                        bclink_set_last_sent();
+                        tn->bcl->next_out = next;
+                        bclink_set_last_sent(net);
                 }
 
                 if (bcbuf_acks(skb) == 0) {
-                        __skb_unlink(skb, &bcl->outqueue);
+                        __skb_unlink(skb, &tn->bcl->outqueue);
                         kfree_skb(skb);
                         released = 1;
                 }
@@ -310,15 +272,14 @@ void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked)
         n_ptr->bclink.acked = acked;
 
         /* Try resolving broadcast link congestion, if necessary */
-        if (unlikely(bcl->next_out)) {
-                tipc_link_push_packets(bcl);
-                bclink_set_last_sent();
+        if (unlikely(tn->bcl->next_out)) {
+                tipc_link_push_packets(tn->bcl);
+                bclink_set_last_sent(net);
         }
-        if (unlikely(released && !skb_queue_empty(&bcl->waiting_sks)))
+        if (unlikely(released && !skb_queue_empty(&tn->bcl->wakeupq)))
                 n_ptr->action_flags |= TIPC_WAKEUP_BCAST_USERS;
-
 exit:
-        tipc_bclink_unlock();
+        tipc_bclink_unlock(net);
 }
 
 /**
@@ -326,9 +287,12 @@ exit:
  *
  * RCU and node lock set
  */
-void tipc_bclink_update_link_state(struct tipc_node *n_ptr, u32 last_sent)
+void tipc_bclink_update_link_state(struct tipc_node *n_ptr,
+                                   u32 last_sent)
 {
         struct sk_buff *buf;
+        struct net *net = n_ptr->net;
+        struct tipc_net *tn = net_generic(net, tipc_net_id);
 
         /* Ignore "stale" link state info */
         if (less_eq(last_sent, n_ptr->bclink.last_in))
@@ -358,18 +322,18 @@ void tipc_bclink_update_link_state(struct tipc_node *n_ptr, u32 last_sent)
                 struct sk_buff *skb = skb_peek(&n_ptr->bclink.deferred_queue);
                 u32 to = skb ? buf_seqno(skb) - 1 : n_ptr->bclink.last_sent;
 
-                tipc_msg_init(msg, BCAST_PROTOCOL, STATE_MSG,
+                tipc_msg_init(tn->own_addr, msg, BCAST_PROTOCOL, STATE_MSG,
                               INT_H_SIZE, n_ptr->addr);
                 msg_set_non_seq(msg, 1);
-                msg_set_mc_netid(msg, tipc_net_id);
+                msg_set_mc_netid(msg, tn->net_id);
                 msg_set_bcast_ack(msg, n_ptr->bclink.last_in);
                 msg_set_bcgap_after(msg, n_ptr->bclink.last_in);
                 msg_set_bcgap_to(msg, to);
 
-                tipc_bclink_lock();
-                tipc_bearer_send(MAX_BEARERS, buf, NULL);
-                bcl->stats.sent_nacks++;
-                tipc_bclink_unlock();
+                tipc_bclink_lock(net);
+                tipc_bearer_send(net, MAX_BEARERS, buf, NULL);
+                tn->bcl->stats.sent_nacks++;
+                tipc_bclink_unlock(net);
                 kfree_skb(buf);
 
                 n_ptr->bclink.oos_state++;
@@ -382,9 +346,9 @@ void tipc_bclink_update_link_state(struct tipc_node *n_ptr, u32 last_sent)
  * Delay any upcoming NACK by this node if another node has already
  * requested the first message this node is going to ask for.
  */
-static void bclink_peek_nack(struct tipc_msg *msg)
+static void bclink_peek_nack(struct net *net, struct tipc_msg *msg)
 {
-        struct tipc_node *n_ptr = tipc_node_find(msg_destnode(msg));
+        struct tipc_node *n_ptr = tipc_node_find(net, msg_destnode(msg));
 
         if (unlikely(!n_ptr))
                 return;
@@ -399,17 +363,23 @@ static void bclink_peek_nack(struct tipc_msg *msg)
         tipc_node_unlock(n_ptr);
 }
 
-/* tipc_bclink_xmit - broadcast buffer chain to all nodes in cluster
+/* tipc_bclink_xmit - deliver buffer chain to all nodes in cluster
  *                    and to identified node local sockets
+ * @net: the applicable net namespace
  * @list: chain of buffers containing message
  * Consumes the buffer chain, except when returning -ELINKCONG
  * Returns 0 if success, otherwise errno: -ELINKCONG,-EHOSTUNREACH,-EMSGSIZE
  */
-int tipc_bclink_xmit(struct sk_buff_head *list)
+int tipc_bclink_xmit(struct net *net, struct sk_buff_head *list)
 {
+        struct tipc_net *tn = net_generic(net, tipc_net_id);
+        struct tipc_link *bcl = tn->bcl;
+        struct tipc_bclink *bclink = tn->bclink;
         int rc = 0;
         int bc = 0;
         struct sk_buff *skb;
+        struct sk_buff_head arrvq;
+        struct sk_buff_head inputq;
 
         /* Prepare clone of message for local node */
         skb = tipc_msg_reassemble(list);
@@ -418,32 +388,35 @@ int tipc_bclink_xmit(struct sk_buff_head *list)
                 return -EHOSTUNREACH;
         }
 
-        /* Broadcast to all other nodes */
+        /* Broadcast to all nodes */
         if (likely(bclink)) {
-                tipc_bclink_lock();
+                tipc_bclink_lock(net);
                 if (likely(bclink->bcast_nodes.count)) {
-                        rc = __tipc_link_xmit(bcl, list);
+                        rc = __tipc_link_xmit(net, bcl, list);
                         if (likely(!rc)) {
                                 u32 len = skb_queue_len(&bcl->outqueue);
 
-                                bclink_set_last_sent();
+                                bclink_set_last_sent(net);
                                 bcl->stats.queue_sz_counts++;
                                 bcl->stats.accu_queue_sz += len;
                         }
                         bc = 1;
                 }
-                tipc_bclink_unlock();
+                tipc_bclink_unlock(net);
         }
 
         if (unlikely(!bc))
                 __skb_queue_purge(list);
 
-        /* Deliver message clone */
-        if (likely(!rc))
-                tipc_sk_mcast_rcv(skb);
-        else
+        if (unlikely(rc)) {
                 kfree_skb(skb);
-
+                return rc;
+        }
+        /* Deliver message clone */
+        __skb_queue_head_init(&arrvq);
+        skb_queue_head_init(&inputq);
+        __skb_queue_tail(&arrvq, skb);
+        tipc_sk_mcast_rcv(net, &arrvq, &inputq);
         return rc;
 }
 
@@ -454,19 +427,21 @@ int tipc_bclink_xmit(struct sk_buff_head *list)
  */
 static void bclink_accept_pkt(struct tipc_node *node, u32 seqno)
 {
+        struct tipc_net *tn = net_generic(node->net, tipc_net_id);
+
         bclink_update_last_sent(node, seqno);
         node->bclink.last_in = seqno;
         node->bclink.oos_state = 0;
-        bcl->stats.recv_info++;
+        tn->bcl->stats.recv_info++;
 
         /*
          * Unicast an ACK periodically, ensuring that
          * all nodes in the cluster don't ACK at the same time
          */
-        if (((seqno - tipc_own_addr) % TIPC_MIN_LINK_WIN) == 0) {
+        if (((seqno - tn->own_addr) % TIPC_MIN_LINK_WIN) == 0) {
                 tipc_link_proto_xmit(node->active_links[node->addr & 1],
                                      STATE_MSG, 0, 0, 0, 0, 0);
-                bcl->stats.sent_acks++;
+                tn->bcl->stats.sent_acks++;
         }
 }
 
@@ -475,19 +450,24 @@ static void bclink_accept_pkt(struct tipc_node *node, u32 seqno)
  *
  * RCU is locked, no other locks set
  */
-void tipc_bclink_rcv(struct sk_buff *buf)
+void tipc_bclink_rcv(struct net *net, struct sk_buff *buf)
 {
+        struct tipc_net *tn = net_generic(net, tipc_net_id);
+        struct tipc_link *bcl = tn->bcl;
         struct tipc_msg *msg = buf_msg(buf);
         struct tipc_node *node;
         u32 next_in;
         u32 seqno;
         int deferred = 0;
+        int pos = 0;
+        struct sk_buff *iskb;
+        struct sk_buff_head *arrvq, *inputq;
 
         /* Screen out unwanted broadcast messages */
-        if (msg_mc_netid(msg) != tipc_net_id)
+        if (msg_mc_netid(msg) != tn->net_id)
                 goto exit;
 
-        node = tipc_node_find(msg_prevnode(msg));
+        node = tipc_node_find(net, msg_prevnode(msg));
         if (unlikely(!node))
                 goto exit;
 
@@ -499,18 +479,18 @@ void tipc_bclink_rcv(struct sk_buff *buf)
         if (unlikely(msg_user(msg) == BCAST_PROTOCOL)) {
                 if (msg_type(msg) != STATE_MSG)
                         goto unlock;
-                if (msg_destnode(msg) == tipc_own_addr) {
+                if (msg_destnode(msg) == tn->own_addr) {
                         tipc_bclink_acknowledge(node, msg_bcast_ack(msg));
                         tipc_node_unlock(node);
-                        tipc_bclink_lock();
+                        tipc_bclink_lock(net);
                         bcl->stats.recv_nacks++;
-                        bclink->retransmit_to = node;
-                        bclink_retransmit_pkt(msg_bcgap_after(msg),
+                        tn->bclink->retransmit_to = node;
+                        bclink_retransmit_pkt(tn, msg_bcgap_after(msg),
                                               msg_bcgap_to(msg));
-                        tipc_bclink_unlock();
+                        tipc_bclink_unlock(net);
                 } else {
                         tipc_node_unlock(node);
-                        bclink_peek_nack(msg);
+                        bclink_peek_nack(net, msg);
                 }
                 goto exit;
         }
@@ -518,52 +498,54 @@ void tipc_bclink_rcv(struct sk_buff *buf)
         /* Handle in-sequence broadcast message */
         seqno = msg_seqno(msg);
         next_in = mod(node->bclink.last_in + 1);
+        arrvq = &tn->bclink->arrvq;
+        inputq = &tn->bclink->inputq;
 
         if (likely(seqno == next_in)) {
 receive:
                 /* Deliver message to destination */
                 if (likely(msg_isdata(msg))) {
-                        tipc_bclink_lock();
+                        tipc_bclink_lock(net);
                         bclink_accept_pkt(node, seqno);
-                        tipc_bclink_unlock();
+                        spin_lock_bh(&inputq->lock);
+                        __skb_queue_tail(arrvq, buf);
+                        spin_unlock_bh(&inputq->lock);
+                        node->action_flags |= TIPC_BCAST_MSG_EVT;
+                        tipc_bclink_unlock(net);
                         tipc_node_unlock(node);
-                        if (likely(msg_mcast(msg)))
-                                tipc_sk_mcast_rcv(buf);
-                        else
-                                kfree_skb(buf);
                 } else if (msg_user(msg) == MSG_BUNDLER) {
-                        tipc_bclink_lock();
+                        tipc_bclink_lock(net);
                         bclink_accept_pkt(node, seqno);
                         bcl->stats.recv_bundles++;
                         bcl->stats.recv_bundled += msg_msgcnt(msg);
-                        tipc_bclink_unlock();
+                        pos = 0;
+                        while (tipc_msg_extract(buf, &iskb, &pos)) {
+                                spin_lock_bh(&inputq->lock);
+                                __skb_queue_tail(arrvq, iskb);
+                                spin_unlock_bh(&inputq->lock);
+                        }
+                        node->action_flags |= TIPC_BCAST_MSG_EVT;
+                        tipc_bclink_unlock(net);
                         tipc_node_unlock(node);
-                        tipc_link_bundle_rcv(buf);
                 } else if (msg_user(msg) == MSG_FRAGMENTER) {
                         tipc_buf_append(&node->bclink.reasm_buf, &buf);
                         if (unlikely(!buf && !node->bclink.reasm_buf))
                                 goto unlock;
-                        tipc_bclink_lock();
+                        tipc_bclink_lock(net);
                         bclink_accept_pkt(node, seqno);
                         bcl->stats.recv_fragments++;
                         if (buf) {
                                 bcl->stats.recv_fragmented++;
                                 msg = buf_msg(buf);
-                                tipc_bclink_unlock();
+                                tipc_bclink_unlock(net);
                                 goto receive;
                         }
-                        tipc_bclink_unlock();
+                        tipc_bclink_unlock(net);
                         tipc_node_unlock(node);
-                } else if (msg_user(msg) == NAME_DISTRIBUTOR) {
-                        tipc_bclink_lock();
-                        bclink_accept_pkt(node, seqno);
-                        tipc_bclink_unlock();
-                        tipc_node_unlock(node);
-                        tipc_named_rcv(buf);
                 } else {
-                        tipc_bclink_lock();
+                        tipc_bclink_lock(net);
                         bclink_accept_pkt(node, seqno);
-                        tipc_bclink_unlock();
+                        tipc_bclink_unlock(net);
                         tipc_node_unlock(node);
                         kfree_skb(buf);
                 }
@@ -601,14 +583,14 @@ receive:
                 buf = NULL;
         }
 
-        tipc_bclink_lock();
+        tipc_bclink_lock(net);
 
         if (deferred)
                 bcl->stats.deferred_recv++;
         else
                 bcl->stats.duplicates++;
 
-        tipc_bclink_unlock();
+        tipc_bclink_unlock(net);
 
 unlock:
         tipc_node_unlock(node);
@@ -619,7 +601,7 @@ exit:
 u32 tipc_bclink_acks_missing(struct tipc_node *n_ptr)
 {
         return (n_ptr->bclink.recv_permitted &&
-                (tipc_bclink_get_last_sent() != n_ptr->bclink.acked));
+                (tipc_bclink_get_last_sent(n_ptr->net) != n_ptr->bclink.acked));
 }
 
 
@@ -632,11 +614,15 @@ u32 tipc_bclink_acks_missing(struct tipc_node *n_ptr)
  * Returns 0 (packet sent successfully) under all circumstances,
  * since the broadcast link's pseudo-bearer never blocks
  */
-static int tipc_bcbearer_send(struct sk_buff *buf, struct tipc_bearer *unused1,
+static int tipc_bcbearer_send(struct net *net, struct sk_buff *buf,
+                              struct tipc_bearer *unused1,
                               struct tipc_media_addr *unused2)
 {
         int bp_index;
         struct tipc_msg *msg = buf_msg(buf);
+        struct tipc_net *tn = net_generic(net, tipc_net_id);
+        struct tipc_bcbearer *bcbearer = tn->bcbearer;
+        struct tipc_bclink *bclink = tn->bclink;
 
         /* Prepare broadcast link message for reliable transmission,
          * if first time trying to send it;
@@ -646,8 +632,8 @@ static int tipc_bcbearer_send(struct sk_buff *buf, struct tipc_bearer *unused1,
         if (likely(!msg_non_seq(buf_msg(buf)))) {
                 bcbuf_set_acks(buf, bclink->bcast_nodes.count);
                 msg_set_non_seq(msg, 1);
-                msg_set_mc_netid(msg, tipc_net_id);
-                bcl->stats.sent_info++;
+                msg_set_mc_netid(msg, tn->net_id);
+                tn->bcl->stats.sent_info++;
 
                 if (WARN_ON(!bclink->bcast_nodes.count)) {
                         dump_stack();
@@ -676,13 +662,14 @@ static int tipc_bcbearer_send(struct sk_buff *buf, struct tipc_bearer *unused1,
 
                 if (bp_index == 0) {
                         /* Use original buffer for first bearer */
-                        tipc_bearer_send(b->identity, buf, &b->bcast_addr);
+                        tipc_bearer_send(net, b->identity, buf, &b->bcast_addr);
                 } else {
                         /* Avoid concurrent buffer access */
                         tbuf = pskb_copy_for_clone(buf, GFP_ATOMIC);
                         if (!tbuf)
                                 break;
-                        tipc_bearer_send(b->identity, tbuf, &b->bcast_addr);
+                        tipc_bearer_send(net, b->identity, tbuf,
+                                         &b->bcast_addr);
                         kfree_skb(tbuf); /* Bearer keeps a clone */
                 }
                 if (bcbearer->remains_new.count == 0)
@@ -697,15 +684,18 @@ static int tipc_bcbearer_send(struct sk_buff *buf, struct tipc_bearer *unused1,
 /**
  * tipc_bcbearer_sort - create sets of bearer pairs used by broadcast bearer
  */
-void tipc_bcbearer_sort(struct tipc_node_map *nm_ptr, u32 node, bool action)
+void tipc_bcbearer_sort(struct net *net, struct tipc_node_map *nm_ptr,
+                        u32 node, bool action)
 {
+        struct tipc_net *tn = net_generic(net, tipc_net_id);
+        struct tipc_bcbearer *bcbearer = tn->bcbearer;
         struct tipc_bcbearer_pair *bp_temp = bcbearer->bpairs_temp;
         struct tipc_bcbearer_pair *bp_curr;
         struct tipc_bearer *b;
         int b_index;
         int pri;
 
-        tipc_bclink_lock();
+        tipc_bclink_lock(net);
 
         if (action)
                 tipc_nmap_add(nm_ptr, node);
@@ -717,7 +707,7 @@ void tipc_bcbearer_sort(struct tipc_node_map *nm_ptr, u32 node, bool action)
 
         rcu_read_lock();
         for (b_index = 0; b_index < MAX_BEARERS; b_index++) {
-                b = rcu_dereference_rtnl(bearer_list[b_index]);
+                b = rcu_dereference_rtnl(tn->bearer_list[b_index]);
                 if (!b || !b->nodes.count)
                         continue;
 
@@ -752,7 +742,7 @@ void tipc_bcbearer_sort(struct tipc_node_map *nm_ptr, u32 node, bool action)
                 bp_curr++;
         }
 
-        tipc_bclink_unlock();
+        tipc_bclink_unlock(net);
 }
 
 static int __tipc_nl_add_bc_link_stat(struct sk_buff *skb,
@@ -806,19 +796,21 @@ msg_full:
         return -EMSGSIZE;
 }
 
-int tipc_nl_add_bc_link(struct tipc_nl_msg *msg)
+int tipc_nl_add_bc_link(struct net *net, struct tipc_nl_msg *msg)
 {
         int err;
         void *hdr;
         struct nlattr *attrs;
         struct nlattr *prop;
+        struct tipc_net *tn = net_generic(net, tipc_net_id);
+        struct tipc_link *bcl = tn->bcl;
 
         if (!bcl)
                 return 0;
 
-        tipc_bclink_lock();
+        tipc_bclink_lock(net);
 
-        hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family,
+        hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
                           NLM_F_MULTI, TIPC_NL_LINK_GET);
         if (!hdr)
                 return -EMSGSIZE;
@@ -851,7 +843,7 @@ int tipc_nl_add_bc_link(struct tipc_nl_msg *msg)
         if (err)
                 goto attr_msg_full;
 
-        tipc_bclink_unlock();
+        tipc_bclink_unlock(net);
         nla_nest_end(msg->skb, attrs);
         genlmsg_end(msg->skb, hdr);
 
@@ -862,79 +854,49 @@ prop_msg_full:
 attr_msg_full:
         nla_nest_cancel(msg->skb, attrs);
 msg_full:
-        tipc_bclink_unlock();
+        tipc_bclink_unlock(net);
         genlmsg_cancel(msg->skb, hdr);
 
         return -EMSGSIZE;
 }
 
-int tipc_bclink_stats(char *buf, const u32 buf_size)
+int tipc_bclink_reset_stats(struct net *net)
 {
-        int ret;
-        struct tipc_stats *s;
+        struct tipc_net *tn = net_generic(net, tipc_net_id);
+        struct tipc_link *bcl = tn->bcl;
 
         if (!bcl)
-                return 0;
-
-        tipc_bclink_lock();
-
-        s = &bcl->stats;
-
-        ret = tipc_snprintf(buf, buf_size, "Link <%s>\n"
-                            "  Window:%u packets\n",
-                            bcl->name, bcl->queue_limit[0]);
-        ret += tipc_snprintf(buf + ret, buf_size - ret,
-                             "  RX packets:%u fragments:%u/%u bundles:%u/%u\n",
-                             s->recv_info, s->recv_fragments,
-                             s->recv_fragmented, s->recv_bundles,
-                             s->recv_bundled);
-        ret += tipc_snprintf(buf + ret, buf_size - ret,
-                             "  TX packets:%u fragments:%u/%u bundles:%u/%u\n",
-                             s->sent_info, s->sent_fragments,
-                             s->sent_fragmented, s->sent_bundles,
-                             s->sent_bundled);
-        ret += tipc_snprintf(buf + ret, buf_size - ret,
-                             "  RX naks:%u defs:%u dups:%u\n",
-                             s->recv_nacks, s->deferred_recv, s->duplicates);
-        ret += tipc_snprintf(buf + ret, buf_size - ret,
-                             "  TX naks:%u acks:%u dups:%u\n",
-                             s->sent_nacks, s->sent_acks, s->retransmitted);
-        ret += tipc_snprintf(buf + ret, buf_size - ret,
-                             "  Congestion link:%u  Send queue max:%u avg:%u\n",
-                             s->link_congs, s->max_queue_sz,
-                             s->queue_sz_counts ?
-                             (s->accu_queue_sz / s->queue_sz_counts) : 0);
-
-        tipc_bclink_unlock();
-        return ret;
-}
-
-int tipc_bclink_reset_stats(void)
-{
-        if (!bcl)
                 return -ENOPROTOOPT;
 
-        tipc_bclink_lock();
+        tipc_bclink_lock(net);
         memset(&bcl->stats, 0, sizeof(bcl->stats));
-        tipc_bclink_unlock();
+        tipc_bclink_unlock(net);
         return 0;
 }
 
-int tipc_bclink_set_queue_limits(u32 limit)
+int tipc_bclink_set_queue_limits(struct net *net, u32 limit)
 {
+        struct tipc_net *tn = net_generic(net, tipc_net_id);
+        struct tipc_link *bcl = tn->bcl;
+
         if (!bcl)
                 return -ENOPROTOOPT;
         if ((limit < TIPC_MIN_LINK_WIN) || (limit > TIPC_MAX_LINK_WIN))
                 return -EINVAL;
 
-        tipc_bclink_lock();
+        tipc_bclink_lock(net);
         tipc_link_set_queue_limits(bcl, limit);
-        tipc_bclink_unlock();
+        tipc_bclink_unlock(net);
         return 0;
 }
 
-int tipc_bclink_init(void)
+int tipc_bclink_init(struct net *net)
 {
+        struct tipc_net *tn = net_generic(net, tipc_net_id);
+        struct tipc_bcbearer *bcbearer;
+        struct tipc_bclink *bclink;
+        struct tipc_link *bcl;
+
         bcbearer = kzalloc(sizeof(*bcbearer), GFP_ATOMIC);
         if (!bcbearer)
                 return -ENOMEM;
@@ -953,30 +915,39 @@ int tipc_bclink_init(void)
         spin_lock_init(&bclink->lock);
         __skb_queue_head_init(&bcl->outqueue);
         __skb_queue_head_init(&bcl->deferred_queue);
-        skb_queue_head_init(&bcl->waiting_sks);
+        skb_queue_head_init(&bcl->wakeupq);
         bcl->next_out_no = 1;
         spin_lock_init(&bclink->node.lock);
-        __skb_queue_head_init(&bclink->node.waiting_sks);
+        __skb_queue_head_init(&bclink->arrvq);
+        skb_queue_head_init(&bclink->inputq);
         bcl->owner = &bclink->node;
+        bcl->owner->net = net;
         bcl->max_pkt = MAX_PKT_DEFAULT_MCAST;
         tipc_link_set_queue_limits(bcl, BCLINK_WIN_DEFAULT);
         bcl->bearer_id = MAX_BEARERS;
-        rcu_assign_pointer(bearer_list[MAX_BEARERS], &bcbearer->bearer);
+        rcu_assign_pointer(tn->bearer_list[MAX_BEARERS], &bcbearer->bearer);
         bcl->state = WORKING_WORKING;
+        bcl->pmsg = (struct tipc_msg *)&bcl->proto_msg;
+        msg_set_prevnode(bcl->pmsg, tn->own_addr);
         strlcpy(bcl->name, tipc_bclink_name, TIPC_MAX_LINK_NAME);
+        tn->bcbearer = bcbearer;
+        tn->bclink = bclink;
+        tn->bcl = bcl;
         return 0;
 }
 
-void tipc_bclink_stop(void)
+void tipc_bclink_stop(struct net *net)
 {
-        tipc_bclink_lock();
-        tipc_link_purge_queues(bcl);
-        tipc_bclink_unlock();
+        struct tipc_net *tn = net_generic(net, tipc_net_id);
+
+        tipc_bclink_lock(net);
+        tipc_link_purge_queues(tn->bcl);
+        tipc_bclink_unlock(net);
 
-        RCU_INIT_POINTER(bearer_list[BCBEARER], NULL);
+        RCU_INIT_POINTER(tn->bearer_list[BCBEARER], NULL);
         synchronize_net();
-        kfree(bcbearer);
-        kfree(bclink);
+        kfree(tn->bcbearer);
+        kfree(tn->bclink);
 }
 
 /**
@@ -1036,50 +1007,3 @@ static void tipc_nmap_diff(struct tipc_node_map *nm_a,
                 }
         }
 }
-
-/**
- * tipc_port_list_add - add a port to a port list, ensuring no duplicates
- */
-void tipc_port_list_add(struct tipc_port_list *pl_ptr, u32 port)
-{
-        struct tipc_port_list *item = pl_ptr;
-        int i;
-        int item_sz = PLSIZE;
-        int cnt = pl_ptr->count;
-
-        for (; ; cnt -= item_sz, item = item->next) {
-                if (cnt < PLSIZE)
-                        item_sz = cnt;
-                for (i = 0; i < item_sz; i++)
-                        if (item->ports[i] == port)
-                                return;
-                if (i < PLSIZE) {
-                        item->ports[i] = port;
-                        pl_ptr->count++;
-                        return;
-                }
-                if (!item->next) {
-                        item->next = kmalloc(sizeof(*item), GFP_ATOMIC);
-                        if (!item->next) {
-                                pr_warn("Incomplete multicast delivery, no memory\n");
-                                return;
-                        }
-                        item->next->next = NULL;
-                }
-        }
-}
-
-/**
- * tipc_port_list_free - free dynamically created entries in port_list chain
- *
- */
-void tipc_port_list_free(struct tipc_port_list *pl_ptr)
-{
-        struct tipc_port_list *item;
-        struct tipc_port_list *next;
-
-        for (item = pl_ptr->next; item; item = next) {
-                next = item->next;
-                kfree(item);
-        }
-}