--- /dev/null
+/*
+ * net/tipc/node.h: Include file for TIPC node management routines
+ *
+ * Copyright (c) 2000-2006, 2014-2015, Ericsson AB
+ * Copyright (c) 2005, 2010-2014, 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_NODE_H
+#define _TIPC_NODE_H
+
+#include "addr.h"
+#include "net.h"
+#include "bearer.h"
+#include "msg.h"
+
+/* Out-of-range value for node signature */
+#define INVALID_NODE_SIG 0x10000
+
+#define NODE_HTABLE_SIZE 512
+
+/* Flags used to take different actions according to flag type
+ * TIPC_WAIT_PEER_LINKS_DOWN: wait to see that peer's links are down
+ * TIPC_WAIT_OWN_LINKS_DOWN: wait until peer node is declared down
+ * TIPC_NOTIFY_NODE_DOWN: notify node is down
+ * TIPC_NOTIFY_NODE_UP: notify node is up
+ * TIPC_DISTRIBUTE_NAME: publish or withdraw link state name type
+ */
+enum {
+ TIPC_MSG_EVT = 1,
+ TIPC_WAIT_PEER_LINKS_DOWN = (1 << 1),
+ TIPC_WAIT_OWN_LINKS_DOWN = (1 << 2),
+ TIPC_NOTIFY_NODE_DOWN = (1 << 3),
+ TIPC_NOTIFY_NODE_UP = (1 << 4),
+ TIPC_WAKEUP_BCAST_USERS = (1 << 5),
+ TIPC_NOTIFY_LINK_UP = (1 << 6),
+ TIPC_NOTIFY_LINK_DOWN = (1 << 7),
+ TIPC_NAMED_MSG_EVT = (1 << 8),
+ TIPC_BCAST_MSG_EVT = (1 << 9),
+ TIPC_BCAST_RESET = (1 << 10)
+};
+
+/**
+ * struct tipc_node_bclink - TIPC node bclink structure
+ * @acked: sequence # of last outbound b'cast message acknowledged by node
+ * @last_in: sequence # of last in-sequence b'cast message received from node
+ * @last_sent: sequence # of last b'cast message sent by node
+ * @oos_state: state tracker for handling OOS b'cast messages
+ * @deferred_queue: deferred queue saved OOS b'cast message received from node
+ * @reasm_buf: broadcast reassembly queue head from node
+ * @inputq_map: bitmap indicating which inqueues should be kicked
+ * @recv_permitted: true if node is allowed to receive b'cast messages
+ */
+struct tipc_node_bclink {
+ u32 acked;
+ u32 last_in;
+ u32 last_sent;
+ u32 oos_state;
+ u32 deferred_size;
+ struct sk_buff_head deferdq;
+ struct sk_buff *reasm_buf;
+ int inputq_map;
+ bool recv_permitted;
+};
+
+/**
+ * struct tipc_node - TIPC node structure
+ * @addr: network address of node
+ * @ref: reference counter to node object
+ * @lock: spinlock governing access to structure
+ * @net: the applicable net namespace
+ * @hash: links to adjacent nodes in unsorted hash chain
+ * @inputq: pointer to input queue containing messages for msg event
+ * @namedq: pointer to name table input queue with name table messages
+ * @curr_link: the link holding the node lock, if any
+ * @active_links: pointers to active links to node
+ * @links: pointers to all links to node
+ * @action_flags: bit mask of different types of node actions
+ * @bclink: broadcast-related info
+ * @list: links to adjacent nodes in sorted list of cluster's nodes
+ * @working_links: number of working links to node (both active and standby)
+ * @link_cnt: number of links to node
+ * @capabilities: bitmap, indicating peer node's functional capabilities
+ * @signature: node instance identifier
+ * @link_id: local and remote bearer ids of changing link, if any
+ * @publ_list: list of publications
+ * @rcu: rcu struct for tipc_node
+ */
+struct tipc_node {
+ u32 addr;
+ struct kref kref;
+ spinlock_t lock;
+ struct net *net;
+ struct hlist_node hash;
+ struct sk_buff_head *inputq;
+ struct sk_buff_head *namedq;
+ struct tipc_link *active_links[2];
+ u32 act_mtus[2];
+ struct tipc_link *links[MAX_BEARERS];
+ int action_flags;
+ struct tipc_node_bclink bclink;
+ struct list_head list;
+ int link_cnt;
+ u16 working_links;
+ u16 capabilities;
+ u32 signature;
+ u32 link_id;
+ struct list_head publ_list;
+ struct list_head conn_sks;
+ struct rcu_head rcu;
+};
+
+struct tipc_node *tipc_node_find(struct net *net, u32 addr);
+void tipc_node_put(struct tipc_node *node);
+struct tipc_node *tipc_node_create(struct net *net, u32 addr);
+void tipc_node_stop(struct net *net);
+void tipc_node_attach_link(struct tipc_node *n_ptr, struct tipc_link *l_ptr);
+void tipc_node_detach_link(struct tipc_node *n_ptr, struct tipc_link *l_ptr);
+void tipc_node_link_down(struct tipc_node *n_ptr, struct tipc_link *l_ptr);
+void tipc_node_link_up(struct tipc_node *n_ptr, struct tipc_link *l_ptr);
+int tipc_node_active_links(struct tipc_node *n_ptr);
+int tipc_node_is_up(struct tipc_node *n_ptr);
+int tipc_node_get_linkname(struct net *net, u32 bearer_id, u32 node,
+ char *linkname, size_t len);
+void tipc_node_unlock(struct tipc_node *node);
+int tipc_node_add_conn(struct net *net, u32 dnode, u32 port, u32 peer_port);
+void tipc_node_remove_conn(struct net *net, u32 dnode, u32 port);
+
+int tipc_nl_node_dump(struct sk_buff *skb, struct netlink_callback *cb);
+
+static inline void tipc_node_lock(struct tipc_node *node)
+{
+ spin_lock_bh(&node->lock);
+}
+
+static inline bool tipc_node_blocked(struct tipc_node *node)
+{
+ return (node->action_flags & (TIPC_WAIT_PEER_LINKS_DOWN |
+ TIPC_NOTIFY_NODE_DOWN | TIPC_WAIT_OWN_LINKS_DOWN));
+}
+
+static inline uint tipc_node_get_mtu(struct net *net, u32 addr, u32 selector)
+{
+ struct tipc_node *node;
+ u32 mtu;
+
+ node = tipc_node_find(net, addr);
+
+ if (likely(node)) {
+ mtu = node->act_mtus[selector & 1];
+ tipc_node_put(node);
+ } else {
+ mtu = MAX_MSG_SIZE;
+ }
+
+ return mtu;
+}
+
+#endif
Code Review / kvmfornfv.git / blobdiff