2006-01-02 11:04:38 -07:00
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/*
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* net/tipc/name_distr.c: TIPC name distribution code
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2007-02-09 07:25:21 -07:00
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*
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2006-01-11 11:14:19 -07:00
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* Copyright (c) 2000-2006, Ericsson AB
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2011-02-23 11:51:15 -07:00
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* Copyright (c) 2005, 2010-2011, Wind River Systems
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2006-01-02 11:04:38 -07:00
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* All rights reserved.
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*
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2006-01-11 05:30:43 -07:00
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* Redistribution and use in source and binary forms, with or without
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2006-01-02 11:04:38 -07:00
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* modification, are permitted provided that the following conditions are met:
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*
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2006-01-11 05:30:43 -07:00
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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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2006-01-02 11:04:38 -07:00
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*
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2006-01-11 05:30:43 -07:00
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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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2006-01-02 11:04:38 -07:00
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "core.h"
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#include "link.h"
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#include "name_distr.h"
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#define ITEM_SIZE sizeof(struct distr_item)
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/**
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* struct distr_item - publication info distributed to other nodes
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* @type: name sequence type
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* @lower: name sequence lower bound
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* @upper: name sequence upper bound
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* @ref: publishing port reference
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* @key: publication key
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2007-02-09 07:25:21 -07:00
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*
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2006-01-02 11:04:38 -07:00
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* ===> All fields are stored in network byte order. <===
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2007-02-09 07:25:21 -07:00
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*
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2006-01-02 11:04:38 -07:00
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* First 3 fields identify (name or) name sequence being published.
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* Reference field uniquely identifies port that published name sequence.
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* Key field uniquely identifies publication, in the event a port has
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* multiple publications of the same name sequence.
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2007-02-09 07:25:21 -07:00
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*
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* Note: There is no field that identifies the publishing node because it is
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2006-01-02 11:04:38 -07:00
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* the same for all items contained within a publication message.
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*/
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struct distr_item {
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2006-11-08 01:19:09 -07:00
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__be32 type;
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__be32 lower;
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__be32 upper;
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__be32 ref;
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__be32 key;
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2006-01-02 11:04:38 -07:00
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};
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/**
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2007-02-09 07:25:21 -07:00
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* List of externally visible publications by this node --
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2006-01-02 11:04:38 -07:00
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* that is, all publications having scope > TIPC_NODE_SCOPE.
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*/
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static LIST_HEAD(publ_root);
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2010-12-31 11:59:34 -07:00
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static u32 publ_cnt;
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2006-01-02 11:04:38 -07:00
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/**
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* publ_to_item - add publication info to a publication message
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*/
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static void publ_to_item(struct distr_item *i, struct publication *p)
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{
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i->type = htonl(p->type);
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i->lower = htonl(p->lower);
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i->upper = htonl(p->upper);
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i->ref = htonl(p->ref);
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i->key = htonl(p->key);
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}
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/**
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* named_prepare_buf - allocate & initialize a publication message
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*/
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static struct sk_buff *named_prepare_buf(u32 type, u32 size, u32 dest)
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{
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2011-05-31 13:03:18 -06:00
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struct sk_buff *buf = tipc_buf_acquire(INT_H_SIZE + size);
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2006-01-02 11:04:38 -07:00
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struct tipc_msg *msg;
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if (buf != NULL) {
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msg = buf_msg(buf);
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2011-05-31 13:03:18 -06:00
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tipc_msg_init(msg, NAME_DISTRIBUTOR, type, INT_H_SIZE, dest);
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msg_set_size(msg, INT_H_SIZE + size);
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2006-01-02 11:04:38 -07:00
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}
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return buf;
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}
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2010-12-31 11:59:19 -07:00
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static void named_cluster_distribute(struct sk_buff *buf)
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{
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struct sk_buff *buf_copy;
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struct tipc_node *n_ptr;
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2011-02-25 16:42:52 -07:00
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list_for_each_entry(n_ptr, &tipc_node_list, list) {
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2011-02-28 08:36:21 -07:00
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if (tipc_node_active_links(n_ptr)) {
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2010-12-31 11:59:19 -07:00
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buf_copy = skb_copy(buf, GFP_ATOMIC);
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if (!buf_copy)
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break;
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msg_set_destnode(buf_msg(buf_copy), n_ptr->addr);
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tipc_link_send(buf_copy, n_ptr->addr, n_ptr->addr);
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}
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}
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2011-11-04 11:24:29 -06:00
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kfree_skb(buf);
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2010-12-31 11:59:19 -07:00
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}
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2006-01-02 11:04:38 -07:00
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/**
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2006-01-17 16:38:21 -07:00
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* tipc_named_publish - tell other nodes about a new publication by this node
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2006-01-02 11:04:38 -07:00
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*/
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2006-01-17 16:38:21 -07:00
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void tipc_named_publish(struct publication *publ)
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2006-01-02 11:04:38 -07:00
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{
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struct sk_buff *buf;
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struct distr_item *item;
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2006-10-16 22:56:04 -06:00
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list_add_tail(&publ->local_list, &publ_root);
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2006-01-02 11:04:38 -07:00
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publ_cnt++;
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buf = named_prepare_buf(PUBLICATION, ITEM_SIZE, 0);
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if (!buf) {
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2006-06-26 00:52:17 -06:00
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warn("Publication distribution failure\n");
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2006-01-02 11:04:38 -07:00
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return;
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}
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item = (struct distr_item *)msg_data(buf_msg(buf));
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publ_to_item(item, publ);
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2010-12-31 11:59:19 -07:00
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named_cluster_distribute(buf);
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2006-01-02 11:04:38 -07:00
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}
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/**
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2006-01-17 16:38:21 -07:00
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* tipc_named_withdraw - tell other nodes about a withdrawn publication by this node
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2006-01-02 11:04:38 -07:00
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*/
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2006-01-17 16:38:21 -07:00
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void tipc_named_withdraw(struct publication *publ)
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2006-01-02 11:04:38 -07:00
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{
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struct sk_buff *buf;
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struct distr_item *item;
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list_del(&publ->local_list);
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publ_cnt--;
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buf = named_prepare_buf(WITHDRAWAL, ITEM_SIZE, 0);
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if (!buf) {
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2011-03-30 19:57:33 -06:00
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warn("Withdrawal distribution failure\n");
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2006-01-02 11:04:38 -07:00
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return;
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}
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item = (struct distr_item *)msg_data(buf_msg(buf));
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publ_to_item(item, publ);
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2010-12-31 11:59:19 -07:00
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named_cluster_distribute(buf);
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2006-01-02 11:04:38 -07:00
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}
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/**
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2006-01-17 16:38:21 -07:00
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* tipc_named_node_up - tell specified node about all publications by this node
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2006-01-02 11:04:38 -07:00
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*/
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2011-09-02 11:45:34 -06:00
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void tipc_named_node_up(unsigned long nodearg)
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2006-01-02 11:04:38 -07:00
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{
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2011-05-31 09:05:02 -06:00
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struct tipc_node *n_ptr;
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2011-12-29 18:58:42 -07:00
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struct tipc_link *l_ptr;
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2006-01-02 11:04:38 -07:00
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struct publication *publ;
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2006-03-20 23:36:47 -07:00
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struct distr_item *item = NULL;
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struct sk_buff *buf = NULL;
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2011-05-31 11:38:02 -06:00
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struct list_head message_list;
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2011-09-02 11:45:34 -06:00
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u32 node = (u32)nodearg;
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2006-01-02 11:04:38 -07:00
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u32 left = 0;
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u32 rest;
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2011-05-31 09:05:02 -06:00
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u32 max_item_buf = 0;
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/* compute maximum amount of publication data to send per message */
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read_lock_bh(&tipc_net_lock);
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2011-09-02 11:45:34 -06:00
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n_ptr = tipc_node_find(node);
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2011-05-31 09:05:02 -06:00
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if (n_ptr) {
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tipc_node_lock(n_ptr);
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l_ptr = n_ptr->active_links[0];
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if (l_ptr)
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max_item_buf = ((l_ptr->max_pkt - INT_H_SIZE) /
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ITEM_SIZE) * ITEM_SIZE;
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tipc_node_unlock(n_ptr);
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}
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read_unlock_bh(&tipc_net_lock);
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if (!max_item_buf)
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return;
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2006-01-02 11:04:38 -07:00
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2011-05-31 11:38:02 -06:00
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/* create list of publication messages, then send them as a unit */
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INIT_LIST_HEAD(&message_list);
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2007-02-09 07:25:21 -07:00
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read_lock_bh(&tipc_nametbl_lock);
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2006-01-02 11:04:38 -07:00
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rest = publ_cnt * ITEM_SIZE;
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list_for_each_entry(publ, &publ_root, local_list) {
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if (!buf) {
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left = (rest <= max_item_buf) ? rest : max_item_buf;
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rest -= left;
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2007-02-09 07:25:21 -07:00
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buf = named_prepare_buf(PUBLICATION, left, node);
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2006-06-26 00:52:17 -06:00
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if (!buf) {
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warn("Bulk publication distribution failure\n");
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2006-01-02 11:04:38 -07:00
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goto exit;
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}
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item = (struct distr_item *)msg_data(buf_msg(buf));
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}
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publ_to_item(item, publ);
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item++;
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left -= ITEM_SIZE;
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if (!left) {
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2011-05-31 11:38:02 -06:00
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list_add_tail((struct list_head *)buf, &message_list);
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2006-03-20 23:36:47 -07:00
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buf = NULL;
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2006-01-02 11:04:38 -07:00
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}
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}
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exit:
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2007-02-09 07:25:21 -07:00
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read_unlock_bh(&tipc_nametbl_lock);
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2011-05-31 11:38:02 -06:00
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tipc_link_send_names(&message_list, (u32)node);
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2006-01-02 11:04:38 -07:00
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}
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/**
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2011-02-23 12:13:41 -07:00
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* named_purge_publ - remove publication associated with a failed node
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2007-02-09 07:25:21 -07:00
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*
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* Invoked for each publication issued by a newly failed node.
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2006-01-02 11:04:38 -07:00
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* Removes publication structure from name table & deletes it.
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*/
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2011-02-23 12:13:41 -07:00
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static void named_purge_publ(struct publication *publ)
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2006-01-02 11:04:38 -07:00
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{
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struct publication *p;
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2006-06-26 00:51:37 -06:00
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2007-02-09 07:25:21 -07:00
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write_lock_bh(&tipc_nametbl_lock);
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p = tipc_nametbl_remove_publ(publ->type, publ->lower,
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2006-01-17 16:38:21 -07:00
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publ->node, publ->ref, publ->key);
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2011-02-23 11:51:15 -07:00
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if (p)
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tipc_nodesub_unsubscribe(&p->subscr);
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2006-01-17 16:38:21 -07:00
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write_unlock_bh(&tipc_nametbl_lock);
|
2006-06-26 00:51:37 -06:00
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2007-02-09 07:25:21 -07:00
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if (p != publ) {
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2006-06-26 00:51:37 -06:00
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err("Unable to remove publication from failed node\n"
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"(type=%u, lower=%u, node=0x%x, ref=%u, key=%u)\n",
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publ->type, publ->lower, publ->node, publ->ref, publ->key);
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}
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2010-12-31 11:59:30 -07:00
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kfree(p);
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2006-01-02 11:04:38 -07:00
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}
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/**
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2006-01-17 16:38:21 -07:00
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* tipc_named_recv - process name table update message sent by another node
|
2006-01-02 11:04:38 -07:00
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*/
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2006-01-17 16:38:21 -07:00
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void tipc_named_recv(struct sk_buff *buf)
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2006-01-02 11:04:38 -07:00
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{
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struct publication *publ;
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struct tipc_msg *msg = buf_msg(buf);
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struct distr_item *item = (struct distr_item *)msg_data(msg);
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u32 count = msg_data_sz(msg) / ITEM_SIZE;
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2007-02-09 07:25:21 -07:00
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write_lock_bh(&tipc_nametbl_lock);
|
2006-01-02 11:04:38 -07:00
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while (count--) {
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if (msg_type(msg) == PUBLICATION) {
|
2007-02-09 07:25:21 -07:00
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publ = tipc_nametbl_insert_publ(ntohl(item->type),
|
2006-01-17 16:38:21 -07:00
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ntohl(item->lower),
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ntohl(item->upper),
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TIPC_CLUSTER_SCOPE,
|
2007-02-09 07:25:21 -07:00
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msg_orignode(msg),
|
2006-01-17 16:38:21 -07:00
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ntohl(item->ref),
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ntohl(item->key));
|
2006-01-02 11:04:38 -07:00
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if (publ) {
|
2007-02-09 07:25:21 -07:00
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tipc_nodesub_subscribe(&publ->subscr,
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msg_orignode(msg),
|
2006-01-17 16:38:21 -07:00
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publ,
|
2011-02-23 12:13:41 -07:00
|
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(net_ev_handler)
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named_purge_publ);
|
2006-01-02 11:04:38 -07:00
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}
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} else if (msg_type(msg) == WITHDRAWAL) {
|
2006-01-17 16:38:21 -07:00
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|
publ = tipc_nametbl_remove_publ(ntohl(item->type),
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ntohl(item->lower),
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msg_orignode(msg),
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ntohl(item->ref),
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ntohl(item->key));
|
2006-01-02 11:04:38 -07:00
|
|
|
|
|
|
|
if (publ) {
|
2006-01-17 16:38:21 -07:00
|
|
|
tipc_nodesub_unsubscribe(&publ->subscr);
|
2007-02-09 07:25:21 -07:00
|
|
|
kfree(publ);
|
2006-06-26 00:51:37 -06:00
|
|
|
} else {
|
|
|
|
err("Unable to remove publication by node 0x%x\n"
|
|
|
|
"(type=%u, lower=%u, ref=%u, key=%u)\n",
|
|
|
|
msg_orignode(msg),
|
|
|
|
ntohl(item->type), ntohl(item->lower),
|
|
|
|
ntohl(item->ref), ntohl(item->key));
|
2006-01-02 11:04:38 -07:00
|
|
|
}
|
|
|
|
} else {
|
2006-06-26 00:52:17 -06:00
|
|
|
warn("Unrecognized name table message received\n");
|
2006-01-02 11:04:38 -07:00
|
|
|
}
|
|
|
|
item++;
|
|
|
|
}
|
2007-02-09 07:25:21 -07:00
|
|
|
write_unlock_bh(&tipc_nametbl_lock);
|
2011-11-04 11:24:29 -06:00
|
|
|
kfree_skb(buf);
|
2006-01-02 11:04:38 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2006-01-17 16:38:21 -07:00
|
|
|
* tipc_named_reinit - re-initialize local publication list
|
2007-02-09 07:25:21 -07:00
|
|
|
*
|
2011-10-14 12:42:25 -06:00
|
|
|
* This routine is called whenever TIPC networking is enabled.
|
2006-01-02 11:04:38 -07:00
|
|
|
* All existing publications by this node that have "cluster" or "zone" scope
|
2011-10-14 12:42:25 -06:00
|
|
|
* are updated to reflect the node's new network address.
|
2006-01-02 11:04:38 -07:00
|
|
|
*/
|
|
|
|
|
2006-01-17 16:38:21 -07:00
|
|
|
void tipc_named_reinit(void)
|
2006-01-02 11:04:38 -07:00
|
|
|
{
|
|
|
|
struct publication *publ;
|
|
|
|
|
2007-02-09 07:25:21 -07:00
|
|
|
write_lock_bh(&tipc_nametbl_lock);
|
2011-10-14 12:42:25 -06:00
|
|
|
|
|
|
|
list_for_each_entry(publ, &publ_root, local_list)
|
2006-01-02 11:04:38 -07:00
|
|
|
publ->node = tipc_own_addr;
|
2011-10-14 12:42:25 -06:00
|
|
|
|
2007-02-09 07:25:21 -07:00
|
|
|
write_unlock_bh(&tipc_nametbl_lock);
|
2006-01-02 11:04:38 -07:00
|
|
|
}
|