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Diffstat (limited to 'net/tipc/node.h')
| -rw-r--r-- | net/tipc/node.h | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/net/tipc/node.h b/net/tipc/node.h new file mode 100644 index 0000000..6f990da --- /dev/null +++ b/net/tipc/node.h @@ -0,0 +1,146 @@ +/* + * net/tipc/node.h: Include file for TIPC node management routines + * + * Copyright (c) 2000-2006, Ericsson AB + * Copyright (c) 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_NODE_H +#define _TIPC_NODE_H + +#include "node_subscr.h" +#include "addr.h" +#include "cluster.h" +#include "bearer.h" + +/** + * struct tipc_node - TIPC node structure + * @addr: network address of node + * @lock: spinlock governing access to structure + * @owner: pointer to cluster that node belongs to + * @next: pointer to next node 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) + * @link_cnt: number of links to node + * @permit_changeover: non-zero if node has redundant links to this system + * @routers: bitmap (used for multicluster communication) + * @last_router: (used for multicluster communication) + * @bclink: broadcast-related info + * @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 + * @gap_after: sequence # of last message not requiring a NAK request + * @gap_to: sequence # of last message requiring a NAK request + * @nack_sync: counter that determines when NAK requests should be sent + * @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 cluster *owner; + struct tipc_node *next; + struct list_head nsub; + struct link *active_links[2]; + struct link *links[MAX_BEARERS]; + int link_cnt; + int working_links; + int permit_changeover; + u32 routers[512/32]; + int last_router; + struct { + int supported; + u32 acked; + u32 last_in; + u32 gap_after; + u32 gap_to; + u32 nack_sync; + struct sk_buff *deferred_head; + struct sk_buff *deferred_tail; + struct sk_buff *defragm; + } bclink; +}; + +extern struct tipc_node *tipc_nodes; +extern u32 tipc_own_tag; + +struct tipc_node *tipc_node_create(u32 addr); +void tipc_node_delete(struct tipc_node *n_ptr); +struct tipc_node *tipc_node_attach_link(struct link *l_ptr); +void tipc_node_detach_link(struct tipc_node *n_ptr, struct link *l_ptr); +void tipc_node_link_down(struct tipc_node *n_ptr, struct link *l_ptr); +void tipc_node_link_up(struct tipc_node *n_ptr, struct link *l_ptr); +int tipc_node_has_active_links(struct tipc_node *n_ptr); +int tipc_node_has_redundant_links(struct tipc_node *n_ptr); +u32 tipc_node_select_router(struct tipc_node *n_ptr, u32 ref); +struct tipc_node *tipc_node_select_next_hop(u32 addr, u32 selector); +int tipc_node_is_up(struct tipc_node *n_ptr); +void tipc_node_add_router(struct tipc_node *n_ptr, u32 router); +void tipc_node_remove_router(struct tipc_node *n_ptr, u32 router); +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 struct tipc_node *tipc_node_find(u32 addr) +{ + if (likely(in_own_cluster(addr))) + return tipc_local_nodes[tipc_node(addr)]; + else if (tipc_addr_domain_valid(addr)) { + struct cluster *c_ptr = tipc_cltr_find(addr); + + if (c_ptr) + return c_ptr->nodes[tipc_node(addr)]; + } + return NULL; +} + +static inline struct tipc_node *tipc_node_select(u32 addr, u32 selector) +{ + if (likely(in_own_cluster(addr))) + return tipc_local_nodes[tipc_node(addr)]; + return tipc_node_select_next_hop(addr, selector); +} + +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 |
