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Diffstat (limited to 'net/tipc/node.h')
| -rw-r--r-- | net/tipc/node.h | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/net/tipc/node.h b/net/tipc/node.h new file mode 100644 index 00000000..72561c97 --- /dev/null +++ b/net/tipc/node.h @@ -0,0 +1,135 @@ +/* + * net/tipc/node.h: Include file for TIPC node management routines + * + * Copyright (c) 2000-2006, Ericsson AB + * Copyright (c) 2005, 2010-2011, 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 "node_subscr.h" +#include "addr.h" +#include "net.h" +#include "bearer.h" + +/* + * Out-of-range value for node signature + */ +#define INVALID_NODE_SIG 0x10000 + +/* Flags used to block (re)establishment of contact with a neighboring node */ + +#define WAIT_PEER_DOWN 0x0001 /* wait to see that peer's links are down */ +#define WAIT_NAMES_GONE 0x0002 /* wait for peer's publications to be purged */ +#define WAIT_NODE_DOWN 0x0004 /* wait until peer node is declared down */ + +/** + * struct tipc_node - TIPC node structure + * @addr: network address of node + * @lock: spinlock governing access to structure + * @hash: links to adjacent nodes in unsorted hash chain + * @list: links to adjacent nodes in sorted list of cluster's nodes + * @nsub: list of "node down" subscriptions monitoring node + * @active_links: pointers to active links to node + * @links: pointers to all links to node + * @working_links: number of working links to node (both active and standby) + * @block_setup: bit mask of conditions preventing link establishment to node + * @link_cnt: number of links to node + * @permit_changeover: non-zero if node has redundant links to this system + * @signature: node instance identifier + * @bclink: broadcast-related info + * @supportable: non-zero if node supports TIPC b'cast link capability + * @supported: non-zero if node supports TIPC b'cast capability + * @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_size: number of OOS b'cast messages in deferred queue + * @deferred_head: oldest OOS b'cast message received from node + * @deferred_tail: newest OOS b'cast message received from node + * @defragm: list of partially reassembled b'cast message fragments from node + */ + +struct tipc_node { + u32 addr; + spinlock_t lock; + struct hlist_node hash; + struct list_head list; + struct list_head nsub; + struct tipc_link *active_links[2]; + struct tipc_link *links[MAX_BEARERS]; + int link_cnt; + int working_links; + int block_setup; + int permit_changeover; + u32 signature; + struct { + u8 supportable; + u8 supported; + u32 acked; + u32 last_in; + u32 last_sent; + u32 oos_state; + u32 deferred_size; + struct sk_buff *deferred_head; + struct sk_buff *deferred_tail; + struct sk_buff *defragm; + } bclink; +}; + +extern struct list_head tipc_node_list; + +struct tipc_node *tipc_node_find(u32 addr); +struct tipc_node *tipc_node_create(u32 addr); +void tipc_node_delete(struct tipc_node *n_ptr); +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_redundant_links(struct tipc_node *n_ptr); +int tipc_node_is_up(struct tipc_node *n_ptr); +struct sk_buff *tipc_node_get_links(const void *req_tlv_area, int req_tlv_space); +struct sk_buff *tipc_node_get_nodes(const void *req_tlv_area, int req_tlv_space); + +static inline void tipc_node_lock(struct tipc_node *n_ptr) +{ + spin_lock_bh(&n_ptr->lock); +} + +static inline void tipc_node_unlock(struct tipc_node *n_ptr) +{ + spin_unlock_bh(&n_ptr->lock); +} + +#endif |