X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fnet%2Ftipc%2Fnode.h;fp=kernel%2Fnet%2Ftipc%2Fnode.h;h=02d5c20dc5511a1669c0262e17d1127a5b2b6a1e;hb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;hp=0000000000000000000000000000000000000000;hpb=98260f3884f4a202f9ca5eabed40b1354c489b29;p=kvmfornfv.git diff --git a/kernel/net/tipc/node.h b/kernel/net/tipc/node.h new file mode 100644 index 000000000..02d5c20dc --- /dev/null +++ b/kernel/net/tipc/node.h @@ -0,0 +1,187 @@ +/* + * 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