1 files changed, 209 insertions, 0 deletions

diff --git a/net/tipc/port.h b/net/tipc/port.h
new file mode 100644
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+/*
+ * net/tipc/port.h: Include file for TIPC port code
+ * 
+ * Copyright (c) 1994-2006, Ericsson AB
+ * Copyright (c) 2004-2005, Wind River Systems
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the names of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _TIPC_PORT_H
+#define _TIPC_PORT_H
+
+#include <net/tipc/tipc_port.h>
+#include "ref.h"
+#include "net.h"
+#include "msg.h"
+#include "dbg.h"
+#include "node_subscr.h"
+
+/**
+ * struct user_port - TIPC user port (used with native API)
+ * @user_ref: id of user who created user port
+ * @usr_handle: user-specified field
+ * @ref: object reference to associated TIPC port
+ * <various callback routines>
+ * @uport_list: adjacent user ports in list of ports held by user
+ */
+ 
+struct user_port {
+        u32 user_ref;
+        void *usr_handle; 
+        u32 ref;
+        tipc_msg_err_event err_cb; 
+        tipc_named_msg_err_event named_err_cb; 
+        tipc_conn_shutdown_event conn_err_cb; 
+        tipc_msg_event msg_cb; 
+        tipc_named_msg_event named_msg_cb; 
+        tipc_conn_msg_event conn_msg_cb; 
+        tipc_continue_event continue_event_cb;
+        struct list_head uport_list;
+};
+
+/**
+ * struct port - TIPC port structure
+ * @publ: TIPC port info available to privileged users
+ * @port_list: adjacent ports in TIPC's global list of ports
+ * @dispatcher: ptr to routine which handles received messages
+ * @wakeup: ptr to routine to call when port is no longer congested
+ * @user_port: ptr to user port associated with port (if any)
+ * @wait_list: adjacent ports in list of ports waiting on link congestion
+ * @congested_link: ptr to congested link port is waiting on
+ * @waiting_pkts:
+ * @sent:
+ * @acked:
+ * @publications: list of publications for port
+ * @pub_count: total # of publications port has made during its lifetime
+ * @max_pkt: maximum packet size "hint" used when building messages sent by port
+ * @probing_state:
+ * @probing_interval:
+ * @last_in_seqno:
+ * @timer_ref:
+ * @subscription: "node down" subscription used to terminate failed connections
+ */
+
+struct port {
+        struct tipc_port publ;
+        struct list_head port_list;
+        u32 (*dispatcher)(struct tipc_port *, struct sk_buff *);
+        void (*wakeup)(struct tipc_port *);
+        struct user_port *user_port;
+        struct list_head wait_list;
+        struct link *congested_link;
+        u32 waiting_pkts;
+        u32 sent;
+        u32 acked;
+        struct list_head publications;
+        u32 pub_count;
+        u32 max_pkt;
+        u32 probing_state;
+        u32 probing_interval;
+        u32 last_in_seqno;
+        struct timer_list timer;
+        struct node_subscr subscription;
+};
+
+extern spinlock_t port_list_lock;
+struct port_list;
+
+int port_recv_sections(struct port *p_ptr, u32 num_sect, 
+                       struct iovec const *msg_sect);
+int port_reject_sections(struct port *p_ptr, struct tipc_msg *hdr,
+                         struct iovec const *msg_sect, u32 num_sect,
+                         int err);
+struct sk_buff *port_get_ports(void);
+struct sk_buff *port_show_stats(const void *req_tlv_area, int req_tlv_space);
+void port_recv_proto_msg(struct sk_buff *buf);
+void port_recv_mcast(struct sk_buff *buf, struct port_list *dp);
+void port_reinit(void);
+
+/**
+ * port_lock - lock port instance referred to and return its pointer
+ */
+
+static inline struct port *port_lock(u32 ref)
+{
+        return (struct port *)ref_lock(ref);
+}
+
+/** 
+ * port_unlock - unlock a port instance
+ * 
+ * Can use pointer instead of ref_unlock() since port is already locked.
+ */
+
+static inline void port_unlock(struct port *p_ptr)
+{
+        spin_unlock_bh(p_ptr->publ.lock);
+}
+
+static inline struct port* port_deref(u32 ref)
+{
+        return (struct port *)ref_deref(ref);
+}
+
+static inline u32 peer_port(struct port *p_ptr)
+{
+        return msg_destport(&p_ptr->publ.phdr);
+}
+
+static inline u32 peer_node(struct port *p_ptr)
+{
+        return msg_destnode(&p_ptr->publ.phdr);
+}
+
+static inline int port_congested(struct port *p_ptr)
+{
+        return((p_ptr->sent - p_ptr->acked) >= (TIPC_FLOW_CONTROL_WIN * 2));
+}
+
+/** 
+ * port_recv_msg - receive message from lower layer and deliver to port user
+ */
+
+static inline int port_recv_msg(struct sk_buff *buf)
+{
+        struct port *p_ptr;
+        struct tipc_msg *msg = buf_msg(buf);
+        u32 destport = msg_destport(msg);
+        u32 dsz = msg_data_sz(msg);
+        u32 err;
+        
+        /* forward unresolved named message */
+        if (unlikely(!destport)) {
+                net_route_msg(buf);
+                return dsz;
+        }
+
+        /* validate destination & pass to port, otherwise reject message */
+        p_ptr = port_lock(destport);
+        if (likely(p_ptr)) {
+                if (likely(p_ptr->publ.connected)) {
+                        if ((unlikely(msg_origport(msg) != peer_port(p_ptr))) ||
+                            (unlikely(msg_orignode(msg) != peer_node(p_ptr))) ||
+                            (unlikely(!msg_connected(msg)))) {
+                                err = TIPC_ERR_NO_PORT;
+                                port_unlock(p_ptr);
+                                goto reject;
+                        }
+                }
+                err = p_ptr->dispatcher(&p_ptr->publ, buf);
+                port_unlock(p_ptr);
+                if (likely(!err))
+                        return dsz;
+        } else {
+                err = TIPC_ERR_NO_PORT;
+        }
+reject:
+        dbg("port->rejecting, err = %x..\n",err);
+        return tipc_reject_msg(buf, err);
+}
+
+#endif