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174 lines
6.2 KiB
174 lines
6.2 KiB
/* |
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* net/tipc/node.h: Include file for TIPC node management routines |
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* |
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* Copyright (c) 2000-2006, Ericsson AB |
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* Copyright (c) 2005, 2010-2014, Wind River Systems |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the names of the copyright holders nor the names of its |
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* contributors may be used to endorse or promote products derived from |
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* this software without specific prior written permission. |
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* |
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* Alternatively, this software may be distributed under the terms of the |
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* GNU General Public License ("GPL") version 2 as published by the Free |
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* Software Foundation. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#ifndef _TIPC_NODE_H |
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#define _TIPC_NODE_H |
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#include "node_subscr.h" |
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#include "addr.h" |
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#include "net.h" |
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#include "bearer.h" |
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#include "msg.h" |
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/* |
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* Out-of-range value for node signature |
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*/ |
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#define INVALID_NODE_SIG 0x10000 |
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/* Flags used to take different actions according to flag type |
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* TIPC_WAIT_PEER_LINKS_DOWN: wait to see that peer's links are down |
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* TIPC_WAIT_OWN_LINKS_DOWN: wait until peer node is declared down |
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* TIPC_NOTIFY_NODE_DOWN: notify node is down |
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* TIPC_NOTIFY_NODE_UP: notify node is up |
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* TIPC_DISTRIBUTE_NAME: publish or withdraw link state name type |
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*/ |
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enum { |
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TIPC_WAIT_PEER_LINKS_DOWN = (1 << 1), |
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TIPC_WAIT_OWN_LINKS_DOWN = (1 << 2), |
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TIPC_NOTIFY_NODE_DOWN = (1 << 3), |
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TIPC_NOTIFY_NODE_UP = (1 << 4), |
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TIPC_WAKEUP_USERS = (1 << 5), |
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TIPC_WAKEUP_BCAST_USERS = (1 << 6), |
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TIPC_NOTIFY_LINK_UP = (1 << 7), |
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TIPC_NOTIFY_LINK_DOWN = (1 << 8) |
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}; |
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/** |
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* struct tipc_node_bclink - TIPC node bclink structure |
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* @acked: sequence # of last outbound b'cast message acknowledged by node |
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* @last_in: sequence # of last in-sequence b'cast message received from node |
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* @last_sent: sequence # of last b'cast message sent by node |
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* @oos_state: state tracker for handling OOS b'cast messages |
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* @deferred_size: number of OOS b'cast messages in deferred queue |
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* @deferred_head: oldest OOS b'cast message received from node |
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* @deferred_tail: newest OOS b'cast message received from node |
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* @reasm_buf: broadcast reassembly queue head from node |
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* @recv_permitted: true if node is allowed to receive b'cast messages |
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*/ |
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struct tipc_node_bclink { |
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u32 acked; |
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u32 last_in; |
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u32 last_sent; |
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u32 oos_state; |
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u32 deferred_size; |
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struct sk_buff *deferred_head; |
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struct sk_buff *deferred_tail; |
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struct sk_buff *reasm_buf; |
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bool recv_permitted; |
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}; |
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/** |
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* struct tipc_node - TIPC node structure |
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* @addr: network address of node |
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* @lock: spinlock governing access to structure |
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* @hash: links to adjacent nodes in unsorted hash chain |
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* @active_links: pointers to active links to node |
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* @links: pointers to all links to node |
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* @action_flags: bit mask of different types of node actions |
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* @bclink: broadcast-related info |
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* @list: links to adjacent nodes in sorted list of cluster's nodes |
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* @working_links: number of working links to node (both active and standby) |
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* @link_cnt: number of links to node |
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* @signature: node instance identifier |
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* @link_id: local and remote bearer ids of changing link, if any |
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* @nsub: list of "node down" subscriptions monitoring node |
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* @rcu: rcu struct for tipc_node |
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*/ |
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struct tipc_node { |
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u32 addr; |
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spinlock_t lock; |
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struct hlist_node hash; |
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struct tipc_link *active_links[2]; |
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u32 act_mtus[2]; |
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struct tipc_link *links[MAX_BEARERS]; |
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unsigned int action_flags; |
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struct tipc_node_bclink bclink; |
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struct list_head list; |
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int link_cnt; |
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int working_links; |
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u32 signature; |
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u32 link_id; |
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struct list_head nsub; |
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struct sk_buff_head waiting_sks; |
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struct list_head conn_sks; |
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struct rcu_head rcu; |
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}; |
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extern struct list_head tipc_node_list; |
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struct tipc_node *tipc_node_find(u32 addr); |
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struct tipc_node *tipc_node_create(u32 addr); |
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void tipc_node_stop(void); |
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void tipc_node_attach_link(struct tipc_node *n_ptr, struct tipc_link *l_ptr); |
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void tipc_node_detach_link(struct tipc_node *n_ptr, struct tipc_link *l_ptr); |
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void tipc_node_link_down(struct tipc_node *n_ptr, struct tipc_link *l_ptr); |
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void tipc_node_link_up(struct tipc_node *n_ptr, struct tipc_link *l_ptr); |
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int tipc_node_active_links(struct tipc_node *n_ptr); |
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int tipc_node_is_up(struct tipc_node *n_ptr); |
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struct sk_buff *tipc_node_get_links(const void *req_tlv_area, int req_tlv_space); |
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struct sk_buff *tipc_node_get_nodes(const void *req_tlv_area, int req_tlv_space); |
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int tipc_node_get_linkname(u32 bearer_id, u32 node, char *linkname, size_t len); |
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void tipc_node_unlock(struct tipc_node *node); |
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int tipc_node_add_conn(u32 dnode, u32 port, u32 peer_port); |
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void tipc_node_remove_conn(u32 dnode, u32 port); |
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static inline void tipc_node_lock(struct tipc_node *node) |
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{ |
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spin_lock_bh(&node->lock); |
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} |
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static inline bool tipc_node_blocked(struct tipc_node *node) |
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{ |
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return (node->action_flags & (TIPC_WAIT_PEER_LINKS_DOWN | |
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TIPC_NOTIFY_NODE_DOWN | TIPC_WAIT_OWN_LINKS_DOWN)); |
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} |
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static inline uint tipc_node_get_mtu(u32 addr, u32 selector) |
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{ |
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struct tipc_node *node; |
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u32 mtu; |
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node = tipc_node_find(addr); |
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if (likely(node)) |
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mtu = node->act_mtus[selector & 1]; |
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else |
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mtu = MAX_MSG_SIZE; |
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return mtu; |
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} |
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#endif
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