1 files changed, 97 insertions, 204 deletions

diff --git a/net/tipc/port.c b/net/tipc/port.c
index b742b2654525..5c14c7801ee6 100644
--- a/net/tipc/port.c
+++ b/net/tipc/port.c
@@ -1,7 +1,7 @@
 /*
  * net/tipc/port.c: TIPC port code
  *
- * Copyright (c) 1992-2007, Ericsson AB
+ * Copyright (c) 1992-2007, 2014, Ericsson AB
  * Copyright (c) 2004-2008, 2010-2013, Wind River Systems
  * All rights reserved.
  *
@@ -38,6 +38,7 @@
 #include "config.h"
 #include "port.h"
 #include "name_table.h"
+#include "socket.h"
 
 /* Connection management: */
 #define PROBING_INTERVAL 3600000        /* [ms] => 1 h */
@@ -54,17 +55,6 @@ static struct sk_buff *port_build_self_abort_msg(struct tipc_port *, u32 err);
 static struct sk_buff *port_build_peer_abort_msg(struct tipc_port *, u32 err);
 static void port_timeout(unsigned long ref);
 
-
-static u32 port_peernode(struct tipc_port *p_ptr)
-{
-        return msg_destnode(&p_ptr->phdr);
-}
-
-static u32 port_peerport(struct tipc_port *p_ptr)
-{
-        return msg_destport(&p_ptr->phdr);
-}
-
 /**
  * tipc_port_peer_msg - verify message was sent by connected port's peer
  *
@@ -76,33 +66,32 @@ int tipc_port_peer_msg(struct tipc_port *p_ptr, struct tipc_msg *msg)
         u32 peernode;
         u32 orignode;
 
-        if (msg_origport(msg) != port_peerport(p_ptr))
+        if (msg_origport(msg) != tipc_port_peerport(p_ptr))
                 return 0;
 
         orignode = msg_orignode(msg);
-        peernode = port_peernode(p_ptr);
+        peernode = tipc_port_peernode(p_ptr);
         return (orignode == peernode) ||
                 (!orignode && (peernode == tipc_own_addr)) ||
                 (!peernode && (orignode == tipc_own_addr));
 }
 
 /**
- * tipc_multicast - send a multicast message to local and remote destinations
+ * tipc_port_mcast_xmit - send a multicast message to local and remote
+ * destinations
  */
-int tipc_multicast(u32 ref, struct tipc_name_seq const *seq,
-                   struct iovec const *msg_sect, unsigned int len)
+int tipc_port_mcast_xmit(struct tipc_port *oport,
+                         struct tipc_name_seq const *seq,
+                         struct iovec const *msg_sect,
+                         unsigned int len)
 {
         struct tipc_msg *hdr;
         struct sk_buff *buf;
         struct sk_buff *ibuf = NULL;
         struct tipc_port_list dports = {0, NULL, };
-        struct tipc_port *oport = tipc_port_deref(ref);
         int ext_targets;
         int res;
 
-        if (unlikely(!oport))
-                return -EINVAL;
-
         /* Create multicast message */
         hdr = &oport->phdr;
         msg_set_type(hdr, TIPC_MCAST_MSG);
@@ -131,7 +120,7 @@ int tipc_multicast(u32 ref, struct tipc_name_seq const *seq,
                                 return -ENOMEM;
                         }
                 }
-                res = tipc_bclink_send_msg(buf);
+                res = tipc_bclink_xmit(buf);
                 if ((res < 0) && (dports.count != 0))
                         kfree_skb(ibuf);
         } else {
@@ -140,7 +129,7 @@ int tipc_multicast(u32 ref, struct tipc_name_seq const *seq,
 
         if (res >= 0) {
                 if (ibuf)
-                        tipc_port_recv_mcast(ibuf, &dports);
+                        tipc_port_mcast_rcv(ibuf, &dports);
         } else {
                 tipc_port_list_free(&dports);
         }
@@ -148,11 +137,11 @@ int tipc_multicast(u32 ref, struct tipc_name_seq const *seq,
 }
 
 /**
- * tipc_port_recv_mcast - deliver multicast message to all destination ports
+ * tipc_port_mcast_rcv - deliver multicast message to all destination ports
  *
  * If there is no port list, perform a lookup to create one
  */
-void tipc_port_recv_mcast(struct sk_buff *buf, struct tipc_port_list *dp)
+void tipc_port_mcast_rcv(struct sk_buff *buf, struct tipc_port_list *dp)
 {
         struct tipc_msg *msg;
         struct tipc_port_list dports = {0, NULL, };
@@ -176,7 +165,7 @@ void tipc_port_recv_mcast(struct sk_buff *buf, struct tipc_port_list *dp)
                 msg_set_destnode(msg, tipc_own_addr);
                 if (dp->count == 1) {
                         msg_set_destport(msg, dp->ports[0]);
-                        tipc_port_recv_msg(buf);
+                        tipc_port_rcv(buf);
                         tipc_port_list_free(dp);
                         return;
                 }
@@ -191,7 +180,7 @@ void tipc_port_recv_mcast(struct sk_buff *buf, struct tipc_port_list *dp)
                         if ((index == 0) && (cnt != 0))
                                 item = item->next;
                         msg_set_destport(buf_msg(b), item->ports[index]);
-                        tipc_port_recv_msg(b);
+                        tipc_port_rcv(b);
                 }
         }
 exit:
@@ -199,40 +188,32 @@ exit:
         tipc_port_list_free(dp);
 }
 
-/**
- * tipc_createport - create a generic TIPC port
+
+void tipc_port_wakeup(struct tipc_port *port)
+{
+        tipc_sock_wakeup(tipc_port_to_sock(port));
+}
+
+/* tipc_port_init - intiate TIPC port and lock it
  *
- * Returns pointer to (locked) TIPC port, or NULL if unable to create it
+ * Returns obtained reference if initialization is successful, zero otherwise
  */
-struct tipc_port *tipc_createport(struct sock *sk,
-                                  u32 (*dispatcher)(struct tipc_port *,
-                                  struct sk_buff *),
-                                  void (*wakeup)(struct tipc_port *),
-                                  const u32 importance)
+u32 tipc_port_init(struct tipc_port *p_ptr,
+                   const unsigned int importance)
 {
-        struct tipc_port *p_ptr;
         struct tipc_msg *msg;
         u32 ref;
 
-        p_ptr = kzalloc(sizeof(*p_ptr), GFP_ATOMIC);
-        if (!p_ptr) {
-                pr_warn("Port creation failed, no memory\n");
-                return NULL;
-        }
         ref = tipc_ref_acquire(p_ptr, &p_ptr->lock);
         if (!ref) {
-                pr_warn("Port creation failed, ref. table exhausted\n");
-                kfree(p_ptr);
-                return NULL;
+                pr_warn("Port registration failed, ref. table exhausted\n");
+                return 0;
         }
 
-        p_ptr->sk = sk;
         p_ptr->max_pkt = MAX_PKT_DEFAULT;
         p_ptr->ref = ref;
         INIT_LIST_HEAD(&p_ptr->wait_list);
         INIT_LIST_HEAD(&p_ptr->subscription.nodesub_list);
-        p_ptr->dispatcher = dispatcher;
-        p_ptr->wakeup = wakeup;
         k_init_timer(&p_ptr->timer, (Handler)port_timeout, ref);
         INIT_LIST_HEAD(&p_ptr->publications);
         INIT_LIST_HEAD(&p_ptr->port_list);
@@ -248,10 +229,10 @@ struct tipc_port *tipc_createport(struct sock *sk,
         msg_set_origport(msg, ref);
         list_add_tail(&p_ptr->port_list, &ports);
         spin_unlock_bh(&tipc_port_list_lock);
-        return p_ptr;
+        return ref;
 }
 
-int tipc_deleteport(struct tipc_port *p_ptr)
+void tipc_port_destroy(struct tipc_port *p_ptr)
 {
         struct sk_buff *buf = NULL;
 
@@ -272,67 +253,7 @@ int tipc_deleteport(struct tipc_port *p_ptr)
         list_del(&p_ptr->wait_list);
         spin_unlock_bh(&tipc_port_list_lock);
         k_term_timer(&p_ptr->timer);
-        kfree(p_ptr);
         tipc_net_route_msg(buf);
-        return 0;
-}
-
-static int port_unreliable(struct tipc_port *p_ptr)
-{
-        return msg_src_droppable(&p_ptr->phdr);
-}
-
-int tipc_portunreliable(u32 ref, unsigned int *isunreliable)
-{
-        struct tipc_port *p_ptr;
-
-        p_ptr = tipc_port_lock(ref);
-        if (!p_ptr)
-                return -EINVAL;
-        *isunreliable = port_unreliable(p_ptr);
-        tipc_port_unlock(p_ptr);
-        return 0;
-}
-
-int tipc_set_portunreliable(u32 ref, unsigned int isunreliable)
-{
-        struct tipc_port *p_ptr;
-
-        p_ptr = tipc_port_lock(ref);
-        if (!p_ptr)
-                return -EINVAL;
-        msg_set_src_droppable(&p_ptr->phdr, (isunreliable != 0));
-        tipc_port_unlock(p_ptr);
-        return 0;
-}
-
-static int port_unreturnable(struct tipc_port *p_ptr)
-{
-        return msg_dest_droppable(&p_ptr->phdr);
-}
-
-int tipc_portunreturnable(u32 ref, unsigned int *isunrejectable)
-{
-        struct tipc_port *p_ptr;
-
-        p_ptr = tipc_port_lock(ref);
-        if (!p_ptr)
-                return -EINVAL;
-        *isunrejectable = port_unreturnable(p_ptr);
-        tipc_port_unlock(p_ptr);
-        return 0;
-}
-
-int tipc_set_portunreturnable(u32 ref, unsigned int isunrejectable)
-{
-        struct tipc_port *p_ptr;
-
-        p_ptr = tipc_port_lock(ref);
-        if (!p_ptr)
-                return -EINVAL;
-        msg_set_dest_droppable(&p_ptr->phdr, (isunrejectable != 0));
-        tipc_port_unlock(p_ptr);
-        return 0;
 }
 
 /*
@@ -350,8 +271,8 @@ static struct sk_buff *port_build_proto_msg(struct tipc_port *p_ptr,
         if (buf) {
                 msg = buf_msg(buf);
                 tipc_msg_init(msg, CONN_MANAGER, type, INT_H_SIZE,
-                              port_peernode(p_ptr));
-                msg_set_destport(msg, port_peerport(p_ptr));
+                              tipc_port_peernode(p_ptr));
+                msg_set_destport(msg, tipc_port_peerport(p_ptr));
                 msg_set_origport(msg, p_ptr->ref);
                 msg_set_msgcnt(msg, ack);
         }
@@ -422,17 +343,17 @@ int tipc_reject_msg(struct sk_buff *buf, u32 err)
         /* send returned message & dispose of rejected message */
         src_node = msg_prevnode(msg);
         if (in_own_node(src_node))
-                tipc_port_recv_msg(rbuf);
+                tipc_port_rcv(rbuf);
         else
-                tipc_link_send(rbuf, src_node, msg_link_selector(rmsg));
+                tipc_link_xmit(rbuf, src_node, msg_link_selector(rmsg));
 exit:
         kfree_skb(buf);
         return data_sz;
 }
 
-int tipc_port_reject_sections(struct tipc_port *p_ptr, struct tipc_msg *hdr,
-                              struct iovec const *msg_sect, unsigned int len,
-                              int err)
+int tipc_port_iovec_reject(struct tipc_port *p_ptr, struct tipc_msg *hdr,
+                           struct iovec const *msg_sect, unsigned int len,
+                           int err)
 {
         struct sk_buff *buf;
         int res;
@@ -519,7 +440,7 @@ static struct sk_buff *port_build_peer_abort_msg(struct tipc_port *p_ptr, u32 er
         return buf;
 }
 
-void tipc_port_recv_proto_msg(struct sk_buff *buf)
+void tipc_port_proto_rcv(struct sk_buff *buf)
 {
         struct tipc_msg *msg = buf_msg(buf);
         struct tipc_port *p_ptr;
@@ -547,13 +468,12 @@ void tipc_port_recv_proto_msg(struct sk_buff *buf)
         /* Process protocol message sent by peer */
         switch (msg_type(msg)) {
         case CONN_ACK:
-                wakeable = tipc_port_congested(p_ptr) && p_ptr->congested &&
-                        p_ptr->wakeup;
+                wakeable = tipc_port_congested(p_ptr) && p_ptr->congested;
                 p_ptr->acked += msg_msgcnt(msg);
                 if (!tipc_port_congested(p_ptr)) {
                         p_ptr->congested = 0;
                         if (wakeable)
-                                p_ptr->wakeup(p_ptr);
+                                tipc_port_wakeup(p_ptr);
                 }
                 break;
         case CONN_PROBE:
@@ -584,8 +504,8 @@ static int port_print(struct tipc_port *p_ptr, char *buf, int len, int full_id)
                 ret = tipc_snprintf(buf, len, "%-10u:", p_ptr->ref);
 
         if (p_ptr->connected) {
-                u32 dport = port_peerport(p_ptr);
-                u32 destnode = port_peernode(p_ptr);
+                u32 dport = tipc_port_peerport(p_ptr);
+                u32 destnode = tipc_port_peernode(p_ptr);
 
                 ret += tipc_snprintf(buf + ret, len - ret,
                                      " connected to <%u.%u.%u:%u>",
@@ -673,34 +593,6 @@ void tipc_acknowledge(u32 ref, u32 ack)
         tipc_net_route_msg(buf);
 }
 
-int tipc_portimportance(u32 ref, unsigned int *importance)
-{
-        struct tipc_port *p_ptr;
-
-        p_ptr = tipc_port_lock(ref);
-        if (!p_ptr)
-                return -EINVAL;
-        *importance = (unsigned int)msg_importance(&p_ptr->phdr);
-        tipc_port_unlock(p_ptr);
-        return 0;
-}
-
-int tipc_set_portimportance(u32 ref, unsigned int imp)
-{
-        struct tipc_port *p_ptr;
-
-        if (imp > TIPC_CRITICAL_IMPORTANCE)
-                return -EINVAL;
-
-        p_ptr = tipc_port_lock(ref);
-        if (!p_ptr)
-                return -EINVAL;
-        msg_set_importance(&p_ptr->phdr, (u32)imp);
-        tipc_port_unlock(p_ptr);
-        return 0;
-}
-
-
 int tipc_publish(struct tipc_port *p_ptr, unsigned int scope,
                  struct tipc_name_seq const *seq)
 {
@@ -760,7 +652,7 @@ int tipc_withdraw(struct tipc_port *p_ptr, unsigned int scope,
         return res;
 }
 
-int tipc_connect(u32 ref, struct tipc_portid const *peer)
+int tipc_port_connect(u32 ref, struct tipc_portid const *peer)
 {
         struct tipc_port *p_ptr;
         int res;
@@ -768,17 +660,17 @@ int tipc_connect(u32 ref, struct tipc_portid const *peer)
         p_ptr = tipc_port_lock(ref);
         if (!p_ptr)
                 return -EINVAL;
-        res = __tipc_connect(ref, p_ptr, peer);
+        res = __tipc_port_connect(ref, p_ptr, peer);
         tipc_port_unlock(p_ptr);
         return res;
 }
 
 /*
- * __tipc_connect - connect to a remote peer
+ * __tipc_port_connect - connect to a remote peer
  *
  * Port must be locked.
  */
-int __tipc_connect(u32 ref, struct tipc_port *p_ptr,
+int __tipc_port_connect(u32 ref, struct tipc_port *p_ptr,
                         struct tipc_portid const *peer)
 {
         struct tipc_msg *msg;
@@ -815,7 +707,7 @@ exit:
  *
  * Port must be locked.
  */
-int __tipc_disconnect(struct tipc_port *tp_ptr)
+int __tipc_port_disconnect(struct tipc_port *tp_ptr)
 {
         if (tp_ptr->connected) {
                 tp_ptr->connected = 0;
@@ -828,10 +720,10 @@ int __tipc_disconnect(struct tipc_port *tp_ptr)
 }
 
 /*
- * tipc_disconnect(): Disconnect port form peer.
+ * tipc_port_disconnect(): Disconnect port form peer.
  *                    This is a node local operation.
  */
-int tipc_disconnect(u32 ref)
+int tipc_port_disconnect(u32 ref)
 {
         struct tipc_port *p_ptr;
         int res;
@@ -839,15 +731,15 @@ int tipc_disconnect(u32 ref)
         p_ptr = tipc_port_lock(ref);
         if (!p_ptr)
                 return -EINVAL;
-        res = __tipc_disconnect(p_ptr);
+        res = __tipc_port_disconnect(p_ptr);
         tipc_port_unlock(p_ptr);
         return res;
 }
 
 /*
- * tipc_shutdown(): Send a SHUTDOWN msg to peer and disconnect
+ * tipc_port_shutdown(): Send a SHUTDOWN msg to peer and disconnect
  */
-int tipc_shutdown(u32 ref)
+int tipc_port_shutdown(u32 ref)
 {
         struct tipc_port *p_ptr;
         struct sk_buff *buf = NULL;
@@ -859,13 +751,13 @@ int tipc_shutdown(u32 ref)
         buf = port_build_peer_abort_msg(p_ptr, TIPC_CONN_SHUTDOWN);
         tipc_port_unlock(p_ptr);
         tipc_net_route_msg(buf);
-        return tipc_disconnect(ref);
+        return tipc_port_disconnect(ref);
 }
 
 /**
- * tipc_port_recv_msg - receive message from lower layer and deliver to port user
+ * tipc_port_rcv - receive message from lower layer and deliver to port user
  */
-int tipc_port_recv_msg(struct sk_buff *buf)
+int tipc_port_rcv(struct sk_buff *buf)
 {
         struct tipc_port *p_ptr;
         struct tipc_msg *msg = buf_msg(buf);
@@ -882,7 +774,7 @@ int tipc_port_recv_msg(struct sk_buff *buf)
         /* validate destination & pass to port, otherwise reject message */
         p_ptr = tipc_port_lock(destport);
         if (likely(p_ptr)) {
-                err = p_ptr->dispatcher(p_ptr, buf);
+                err = tipc_sk_rcv(&tipc_port_to_sock(p_ptr)->sk, buf);
                 tipc_port_unlock(p_ptr);
                 if (likely(!err))
                         return dsz;
@@ -894,43 +786,43 @@ int tipc_port_recv_msg(struct sk_buff *buf)
 }
 
 /*
- *  tipc_port_recv_sections(): Concatenate and deliver sectioned
- *                        message for this node.
+ *  tipc_port_iovec_rcv: Concatenate and deliver sectioned
+ *                       message for this node.
  */
-static int tipc_port_recv_sections(struct tipc_port *sender,
-                                   struct iovec const *msg_sect,
-                                   unsigned int len)
+static int tipc_port_iovec_rcv(struct tipc_port *sender,
+                               struct iovec const *msg_sect,
+                               unsigned int len)
 {
         struct sk_buff *buf;
         int res;
 
         res = tipc_msg_build(&sender->phdr, msg_sect, len, MAX_MSG_SIZE, &buf);
         if (likely(buf))
-                tipc_port_recv_msg(buf);
+                tipc_port_rcv(buf);
         return res;
 }
 
 /**
  * tipc_send - send message sections on connection
  */
-int tipc_send(u32 ref, struct iovec const *msg_sect, unsigned int len)
+int tipc_send(struct tipc_port *p_ptr,
+              struct iovec const *msg_sect,
+              unsigned int len)
 {
-        struct tipc_port *p_ptr;
         u32 destnode;
         int res;
 
-        p_ptr = tipc_port_deref(ref);
-        if (!p_ptr || !p_ptr->connected)
+        if (!p_ptr->connected)
                 return -EINVAL;
 
         p_ptr->congested = 1;
         if (!tipc_port_congested(p_ptr)) {
-                destnode = port_peernode(p_ptr);
+                destnode = tipc_port_peernode(p_ptr);
                 if (likely(!in_own_node(destnode)))
-                        res = tipc_link_send_sections_fast(p_ptr, msg_sect,
-                                                           len, destnode);
+                        res = tipc_link_iovec_xmit_fast(p_ptr, msg_sect, len,
+                                                        destnode);
                 else
-                        res = tipc_port_recv_sections(p_ptr, msg_sect, len);
+                        res = tipc_port_iovec_rcv(p_ptr, msg_sect, len);
 
                 if (likely(res != -ELINKCONG)) {
                         p_ptr->congested = 0;
@@ -939,7 +831,7 @@ int tipc_send(u32 ref, struct iovec const *msg_sect, unsigned int len)
                         return res;
                 }
         }
-        if (port_unreliable(p_ptr)) {
+        if (tipc_port_unreliable(p_ptr)) {
                 p_ptr->congested = 0;
                 return len;
         }
@@ -949,17 +841,18 @@ int tipc_send(u32 ref, struct iovec const *msg_sect, unsigned int len)
 /**
  * tipc_send2name - send message sections to port name
  */
-int tipc_send2name(u32 ref, struct tipc_name const *name, unsigned int domain,
-                   struct iovec const *msg_sect, unsigned int len)
+int tipc_send2name(struct tipc_port *p_ptr,
+                   struct tipc_name const *name,
+                   unsigned int domain,
+                   struct iovec const *msg_sect,
+                   unsigned int len)
 {
-        struct tipc_port *p_ptr;
         struct tipc_msg *msg;
         u32 destnode = domain;
         u32 destport;
         int res;
 
-        p_ptr = tipc_port_deref(ref);
-        if (!p_ptr || p_ptr->connected)
+        if (p_ptr->connected)
                 return -EINVAL;
 
         msg = &p_ptr->phdr;
@@ -974,39 +867,39 @@ int tipc_send2name(u32 ref, struct tipc_name const *name, unsigned int domain,
 
         if (likely(destport || destnode)) {
                 if (likely(in_own_node(destnode)))
-                        res = tipc_port_recv_sections(p_ptr, msg_sect, len);
+                        res = tipc_port_iovec_rcv(p_ptr, msg_sect, len);
                 else if (tipc_own_addr)
-                        res = tipc_link_send_sections_fast(p_ptr, msg_sect,
-                                                           len, destnode);
+                        res = tipc_link_iovec_xmit_fast(p_ptr, msg_sect, len,
+                                                        destnode);
                 else
-                        res = tipc_port_reject_sections(p_ptr, msg, msg_sect,
-                                                        len, TIPC_ERR_NO_NODE);
+                        res = tipc_port_iovec_reject(p_ptr, msg, msg_sect,
+                                                     len, TIPC_ERR_NO_NODE);
                 if (likely(res != -ELINKCONG)) {
                         if (res > 0)
                                 p_ptr->sent++;
                         return res;
                 }
-                if (port_unreliable(p_ptr)) {
+                if (tipc_port_unreliable(p_ptr))
                         return len;
-                }
+
                 return -ELINKCONG;
         }
-        return tipc_port_reject_sections(p_ptr, msg, msg_sect, len,
-                                         TIPC_ERR_NO_NAME);
+        return tipc_port_iovec_reject(p_ptr, msg, msg_sect, len,
+                                      TIPC_ERR_NO_NAME);
 }
 
 /**
  * tipc_send2port - send message sections to port identity
  */
-int tipc_send2port(u32 ref, struct tipc_portid const *dest,
-                   struct iovec const *msg_sect, unsigned int len)
+int tipc_send2port(struct tipc_port *p_ptr,
+                   struct tipc_portid const *dest,
+                   struct iovec const *msg_sect,
+                   unsigned int len)
 {
-        struct tipc_port *p_ptr;
         struct tipc_msg *msg;
         int res;
 
-        p_ptr = tipc_port_deref(ref);
-        if (!p_ptr || p_ptr->connected)
+        if (p_ptr->connected)
                 return -EINVAL;
 
         msg = &p_ptr->phdr;
@@ -1017,20 +910,20 @@ int tipc_send2port(u32 ref, struct tipc_portid const *dest,
         msg_set_hdr_sz(msg, BASIC_H_SIZE);
 
         if (in_own_node(dest->node))
-                res =  tipc_port_recv_sections(p_ptr, msg_sect, len);
+                res =  tipc_port_iovec_rcv(p_ptr, msg_sect, len);
         else if (tipc_own_addr)
-                res = tipc_link_send_sections_fast(p_ptr, msg_sect, len,
-                                                   dest->node);
+                res = tipc_link_iovec_xmit_fast(p_ptr, msg_sect, len,
+                                                dest->node);
         else
-                res = tipc_port_reject_sections(p_ptr, msg, msg_sect, len,
+                res = tipc_port_iovec_reject(p_ptr, msg, msg_sect, len,
                                                 TIPC_ERR_NO_NODE);
         if (likely(res != -ELINKCONG)) {
                 if (res > 0)
                         p_ptr->sent++;
                 return res;
         }
-        if (port_unreliable(p_ptr)) {
+        if (tipc_port_unreliable(p_ptr))
                 return len;
-        }
+
         return -ELINKCONG;
 }