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c430728526
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
577 lines
14 KiB
C
577 lines
14 KiB
C
/*
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* net/tipc/cluster.c: TIPC cluster management routines
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*
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* Copyright (c) 2000-2006, Ericsson AB
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* Copyright (c) 2005, 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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#include "core.h"
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#include "cluster.h"
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#include "addr.h"
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#include "node_subscr.h"
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#include "link.h"
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#include "node.h"
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#include "net.h"
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#include "msg.h"
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#include "bearer.h"
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static void tipc_cltr_multicast(struct cluster *c_ptr, struct sk_buff *buf,
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u32 lower, u32 upper);
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static struct sk_buff *tipc_cltr_prepare_routing_msg(u32 data_size, u32 dest);
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struct node **tipc_local_nodes = NULL;
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struct node_map tipc_cltr_bcast_nodes = {0,{0,}};
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u32 tipc_highest_allowed_slave = 0;
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struct cluster *tipc_cltr_create(u32 addr)
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{
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struct _zone *z_ptr;
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struct cluster *c_ptr;
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int max_nodes;
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c_ptr = kzalloc(sizeof(*c_ptr), GFP_ATOMIC);
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if (c_ptr == NULL) {
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warn("Cluster creation failure, no memory\n");
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return NULL;
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}
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c_ptr->addr = tipc_addr(tipc_zone(addr), tipc_cluster(addr), 0);
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if (in_own_cluster(addr))
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max_nodes = LOWEST_SLAVE + tipc_max_slaves;
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else
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max_nodes = tipc_max_nodes + 1;
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c_ptr->nodes = kcalloc(max_nodes + 1, sizeof(void*), GFP_ATOMIC);
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if (c_ptr->nodes == NULL) {
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warn("Cluster creation failure, no memory for node area\n");
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kfree(c_ptr);
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return NULL;
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}
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if (in_own_cluster(addr))
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tipc_local_nodes = c_ptr->nodes;
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c_ptr->highest_slave = LOWEST_SLAVE - 1;
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c_ptr->highest_node = 0;
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z_ptr = tipc_zone_find(tipc_zone(addr));
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if (!z_ptr) {
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z_ptr = tipc_zone_create(addr);
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}
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if (!z_ptr) {
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kfree(c_ptr->nodes);
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kfree(c_ptr);
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return NULL;
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}
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tipc_zone_attach_cluster(z_ptr, c_ptr);
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c_ptr->owner = z_ptr;
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return c_ptr;
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}
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void tipc_cltr_delete(struct cluster *c_ptr)
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{
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u32 n_num;
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if (!c_ptr)
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return;
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for (n_num = 1; n_num <= c_ptr->highest_node; n_num++) {
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tipc_node_delete(c_ptr->nodes[n_num]);
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}
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for (n_num = LOWEST_SLAVE; n_num <= c_ptr->highest_slave; n_num++) {
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tipc_node_delete(c_ptr->nodes[n_num]);
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}
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kfree(c_ptr->nodes);
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kfree(c_ptr);
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}
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u32 tipc_cltr_next_node(struct cluster *c_ptr, u32 addr)
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{
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struct node *n_ptr;
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u32 n_num = tipc_node(addr) + 1;
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if (!c_ptr)
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return addr;
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for (; n_num <= c_ptr->highest_node; n_num++) {
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n_ptr = c_ptr->nodes[n_num];
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if (n_ptr && tipc_node_has_active_links(n_ptr))
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return n_ptr->addr;
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}
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for (n_num = 1; n_num < tipc_node(addr); n_num++) {
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n_ptr = c_ptr->nodes[n_num];
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if (n_ptr && tipc_node_has_active_links(n_ptr))
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return n_ptr->addr;
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}
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return 0;
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}
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void tipc_cltr_attach_node(struct cluster *c_ptr, struct node *n_ptr)
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{
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u32 n_num = tipc_node(n_ptr->addr);
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u32 max_n_num = tipc_max_nodes;
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if (in_own_cluster(n_ptr->addr))
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max_n_num = tipc_highest_allowed_slave;
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assert(n_num > 0);
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assert(n_num <= max_n_num);
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assert(c_ptr->nodes[n_num] == 0);
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c_ptr->nodes[n_num] = n_ptr;
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if (n_num > c_ptr->highest_node)
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c_ptr->highest_node = n_num;
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}
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/**
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* tipc_cltr_select_router - select router to a cluster
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*
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* Uses deterministic and fair algorithm.
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*/
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u32 tipc_cltr_select_router(struct cluster *c_ptr, u32 ref)
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{
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u32 n_num;
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u32 ulim = c_ptr->highest_node;
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u32 mask;
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u32 tstart;
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assert(!in_own_cluster(c_ptr->addr));
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if (!ulim)
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return 0;
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/* Start entry must be random */
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mask = tipc_max_nodes;
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while (mask > ulim)
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mask >>= 1;
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tstart = ref & mask;
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n_num = tstart;
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/* Lookup upwards with wrap-around */
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do {
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if (tipc_node_is_up(c_ptr->nodes[n_num]))
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break;
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} while (++n_num <= ulim);
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if (n_num > ulim) {
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n_num = 1;
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do {
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if (tipc_node_is_up(c_ptr->nodes[n_num]))
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break;
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} while (++n_num < tstart);
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if (n_num == tstart)
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return 0;
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}
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assert(n_num <= ulim);
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return tipc_node_select_router(c_ptr->nodes[n_num], ref);
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}
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/**
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* tipc_cltr_select_node - select destination node within a remote cluster
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*
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* Uses deterministic and fair algorithm.
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*/
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struct node *tipc_cltr_select_node(struct cluster *c_ptr, u32 selector)
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{
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u32 n_num;
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u32 mask = tipc_max_nodes;
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u32 start_entry;
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assert(!in_own_cluster(c_ptr->addr));
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if (!c_ptr->highest_node)
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return NULL;
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/* Start entry must be random */
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while (mask > c_ptr->highest_node) {
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mask >>= 1;
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}
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start_entry = (selector & mask) ? selector & mask : 1u;
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assert(start_entry <= c_ptr->highest_node);
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/* Lookup upwards with wrap-around */
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for (n_num = start_entry; n_num <= c_ptr->highest_node; n_num++) {
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if (tipc_node_has_active_links(c_ptr->nodes[n_num]))
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return c_ptr->nodes[n_num];
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}
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for (n_num = 1; n_num < start_entry; n_num++) {
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if (tipc_node_has_active_links(c_ptr->nodes[n_num]))
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return c_ptr->nodes[n_num];
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}
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return NULL;
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}
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/*
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* Routing table management: See description in node.c
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*/
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static struct sk_buff *tipc_cltr_prepare_routing_msg(u32 data_size, u32 dest)
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{
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u32 size = INT_H_SIZE + data_size;
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struct sk_buff *buf = buf_acquire(size);
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struct tipc_msg *msg;
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if (buf) {
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msg = buf_msg(buf);
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memset((char *)msg, 0, size);
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msg_init(msg, ROUTE_DISTRIBUTOR, 0, TIPC_OK, INT_H_SIZE, dest);
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}
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return buf;
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}
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void tipc_cltr_bcast_new_route(struct cluster *c_ptr, u32 dest,
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u32 lower, u32 upper)
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{
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struct sk_buff *buf = tipc_cltr_prepare_routing_msg(0, c_ptr->addr);
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struct tipc_msg *msg;
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if (buf) {
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msg = buf_msg(buf);
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msg_set_remote_node(msg, dest);
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msg_set_type(msg, ROUTE_ADDITION);
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tipc_cltr_multicast(c_ptr, buf, lower, upper);
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} else {
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warn("Memory squeeze: broadcast of new route failed\n");
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}
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}
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void tipc_cltr_bcast_lost_route(struct cluster *c_ptr, u32 dest,
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u32 lower, u32 upper)
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{
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struct sk_buff *buf = tipc_cltr_prepare_routing_msg(0, c_ptr->addr);
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struct tipc_msg *msg;
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if (buf) {
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msg = buf_msg(buf);
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msg_set_remote_node(msg, dest);
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msg_set_type(msg, ROUTE_REMOVAL);
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tipc_cltr_multicast(c_ptr, buf, lower, upper);
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} else {
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warn("Memory squeeze: broadcast of lost route failed\n");
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}
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}
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void tipc_cltr_send_slave_routes(struct cluster *c_ptr, u32 dest)
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{
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struct sk_buff *buf;
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struct tipc_msg *msg;
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u32 highest = c_ptr->highest_slave;
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u32 n_num;
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int send = 0;
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assert(!is_slave(dest));
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assert(in_own_cluster(dest));
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assert(in_own_cluster(c_ptr->addr));
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if (highest <= LOWEST_SLAVE)
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return;
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buf = tipc_cltr_prepare_routing_msg(highest - LOWEST_SLAVE + 1,
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c_ptr->addr);
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if (buf) {
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msg = buf_msg(buf);
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msg_set_remote_node(msg, c_ptr->addr);
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msg_set_type(msg, SLAVE_ROUTING_TABLE);
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for (n_num = LOWEST_SLAVE; n_num <= highest; n_num++) {
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if (c_ptr->nodes[n_num] &&
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tipc_node_has_active_links(c_ptr->nodes[n_num])) {
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send = 1;
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msg_set_dataoctet(msg, n_num);
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}
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}
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if (send)
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tipc_link_send(buf, dest, dest);
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else
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buf_discard(buf);
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} else {
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warn("Memory squeeze: broadcast of lost route failed\n");
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}
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}
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void tipc_cltr_send_ext_routes(struct cluster *c_ptr, u32 dest)
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{
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struct sk_buff *buf;
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struct tipc_msg *msg;
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u32 highest = c_ptr->highest_node;
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u32 n_num;
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int send = 0;
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if (in_own_cluster(c_ptr->addr))
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return;
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assert(!is_slave(dest));
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assert(in_own_cluster(dest));
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highest = c_ptr->highest_node;
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buf = tipc_cltr_prepare_routing_msg(highest + 1, c_ptr->addr);
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if (buf) {
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msg = buf_msg(buf);
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msg_set_remote_node(msg, c_ptr->addr);
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msg_set_type(msg, EXT_ROUTING_TABLE);
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for (n_num = 1; n_num <= highest; n_num++) {
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if (c_ptr->nodes[n_num] &&
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tipc_node_has_active_links(c_ptr->nodes[n_num])) {
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send = 1;
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msg_set_dataoctet(msg, n_num);
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}
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}
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if (send)
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tipc_link_send(buf, dest, dest);
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else
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buf_discard(buf);
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} else {
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warn("Memory squeeze: broadcast of external route failed\n");
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}
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}
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void tipc_cltr_send_local_routes(struct cluster *c_ptr, u32 dest)
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{
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struct sk_buff *buf;
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struct tipc_msg *msg;
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u32 highest = c_ptr->highest_node;
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u32 n_num;
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int send = 0;
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assert(is_slave(dest));
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assert(in_own_cluster(c_ptr->addr));
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buf = tipc_cltr_prepare_routing_msg(highest, c_ptr->addr);
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if (buf) {
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msg = buf_msg(buf);
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msg_set_remote_node(msg, c_ptr->addr);
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msg_set_type(msg, LOCAL_ROUTING_TABLE);
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for (n_num = 1; n_num <= highest; n_num++) {
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if (c_ptr->nodes[n_num] &&
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tipc_node_has_active_links(c_ptr->nodes[n_num])) {
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send = 1;
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msg_set_dataoctet(msg, n_num);
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}
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}
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if (send)
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tipc_link_send(buf, dest, dest);
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else
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buf_discard(buf);
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} else {
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warn("Memory squeeze: broadcast of local route failed\n");
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}
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}
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void tipc_cltr_recv_routing_table(struct sk_buff *buf)
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{
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struct tipc_msg *msg = buf_msg(buf);
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struct cluster *c_ptr;
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struct node *n_ptr;
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unchar *node_table;
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u32 table_size;
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u32 router;
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u32 rem_node = msg_remote_node(msg);
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u32 z_num;
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u32 c_num;
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u32 n_num;
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c_ptr = tipc_cltr_find(rem_node);
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if (!c_ptr) {
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c_ptr = tipc_cltr_create(rem_node);
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if (!c_ptr) {
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buf_discard(buf);
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return;
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}
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}
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node_table = buf->data + msg_hdr_sz(msg);
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table_size = msg_size(msg) - msg_hdr_sz(msg);
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router = msg_prevnode(msg);
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z_num = tipc_zone(rem_node);
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c_num = tipc_cluster(rem_node);
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switch (msg_type(msg)) {
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case LOCAL_ROUTING_TABLE:
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assert(is_slave(tipc_own_addr));
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case EXT_ROUTING_TABLE:
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for (n_num = 1; n_num < table_size; n_num++) {
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if (node_table[n_num]) {
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u32 addr = tipc_addr(z_num, c_num, n_num);
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n_ptr = c_ptr->nodes[n_num];
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if (!n_ptr) {
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n_ptr = tipc_node_create(addr);
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}
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if (n_ptr)
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tipc_node_add_router(n_ptr, router);
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}
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}
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break;
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case SLAVE_ROUTING_TABLE:
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assert(!is_slave(tipc_own_addr));
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assert(in_own_cluster(c_ptr->addr));
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for (n_num = 1; n_num < table_size; n_num++) {
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if (node_table[n_num]) {
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u32 slave_num = n_num + LOWEST_SLAVE;
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u32 addr = tipc_addr(z_num, c_num, slave_num);
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n_ptr = c_ptr->nodes[slave_num];
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if (!n_ptr) {
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n_ptr = tipc_node_create(addr);
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}
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if (n_ptr)
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tipc_node_add_router(n_ptr, router);
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}
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}
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break;
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case ROUTE_ADDITION:
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if (!is_slave(tipc_own_addr)) {
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assert(!in_own_cluster(c_ptr->addr)
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|| is_slave(rem_node));
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} else {
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assert(in_own_cluster(c_ptr->addr)
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&& !is_slave(rem_node));
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}
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n_ptr = c_ptr->nodes[tipc_node(rem_node)];
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if (!n_ptr)
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n_ptr = tipc_node_create(rem_node);
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if (n_ptr)
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tipc_node_add_router(n_ptr, router);
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break;
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case ROUTE_REMOVAL:
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if (!is_slave(tipc_own_addr)) {
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assert(!in_own_cluster(c_ptr->addr)
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|| is_slave(rem_node));
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} else {
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assert(in_own_cluster(c_ptr->addr)
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&& !is_slave(rem_node));
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}
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n_ptr = c_ptr->nodes[tipc_node(rem_node)];
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if (n_ptr)
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tipc_node_remove_router(n_ptr, router);
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break;
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default:
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assert(!"Illegal routing manager message received\n");
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}
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buf_discard(buf);
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}
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void tipc_cltr_remove_as_router(struct cluster *c_ptr, u32 router)
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{
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u32 start_entry;
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u32 tstop;
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u32 n_num;
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if (is_slave(router))
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return; /* Slave nodes can not be routers */
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if (in_own_cluster(c_ptr->addr)) {
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start_entry = LOWEST_SLAVE;
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tstop = c_ptr->highest_slave;
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} else {
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start_entry = 1;
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tstop = c_ptr->highest_node;
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}
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for (n_num = start_entry; n_num <= tstop; n_num++) {
|
|
if (c_ptr->nodes[n_num]) {
|
|
tipc_node_remove_router(c_ptr->nodes[n_num], router);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* tipc_cltr_multicast - multicast message to local nodes
|
|
*/
|
|
|
|
static void tipc_cltr_multicast(struct cluster *c_ptr, struct sk_buff *buf,
|
|
u32 lower, u32 upper)
|
|
{
|
|
struct sk_buff *buf_copy;
|
|
struct node *n_ptr;
|
|
u32 n_num;
|
|
u32 tstop;
|
|
|
|
assert(lower <= upper);
|
|
assert(((lower >= 1) && (lower <= tipc_max_nodes)) ||
|
|
((lower >= LOWEST_SLAVE) && (lower <= tipc_highest_allowed_slave)));
|
|
assert(((upper >= 1) && (upper <= tipc_max_nodes)) ||
|
|
((upper >= LOWEST_SLAVE) && (upper <= tipc_highest_allowed_slave)));
|
|
assert(in_own_cluster(c_ptr->addr));
|
|
|
|
tstop = is_slave(upper) ? c_ptr->highest_slave : c_ptr->highest_node;
|
|
if (tstop > upper)
|
|
tstop = upper;
|
|
for (n_num = lower; n_num <= tstop; n_num++) {
|
|
n_ptr = c_ptr->nodes[n_num];
|
|
if (n_ptr && tipc_node_has_active_links(n_ptr)) {
|
|
buf_copy = skb_copy(buf, GFP_ATOMIC);
|
|
if (buf_copy == NULL)
|
|
break;
|
|
msg_set_destnode(buf_msg(buf_copy), n_ptr->addr);
|
|
tipc_link_send(buf_copy, n_ptr->addr, n_ptr->addr);
|
|
}
|
|
}
|
|
buf_discard(buf);
|
|
}
|
|
|
|
/**
|
|
* tipc_cltr_broadcast - broadcast message to all nodes within cluster
|
|
*/
|
|
|
|
void tipc_cltr_broadcast(struct sk_buff *buf)
|
|
{
|
|
struct sk_buff *buf_copy;
|
|
struct cluster *c_ptr;
|
|
struct node *n_ptr;
|
|
u32 n_num;
|
|
u32 tstart;
|
|
u32 tstop;
|
|
u32 node_type;
|
|
|
|
if (tipc_mode == TIPC_NET_MODE) {
|
|
c_ptr = tipc_cltr_find(tipc_own_addr);
|
|
assert(in_own_cluster(c_ptr->addr)); /* For now */
|
|
|
|
/* Send to standard nodes, then repeat loop sending to slaves */
|
|
tstart = 1;
|
|
tstop = c_ptr->highest_node;
|
|
for (node_type = 1; node_type <= 2; node_type++) {
|
|
for (n_num = tstart; n_num <= tstop; n_num++) {
|
|
n_ptr = c_ptr->nodes[n_num];
|
|
if (n_ptr && tipc_node_has_active_links(n_ptr)) {
|
|
buf_copy = skb_copy(buf, GFP_ATOMIC);
|
|
if (buf_copy == NULL)
|
|
goto exit;
|
|
msg_set_destnode(buf_msg(buf_copy),
|
|
n_ptr->addr);
|
|
tipc_link_send(buf_copy, n_ptr->addr,
|
|
n_ptr->addr);
|
|
}
|
|
}
|
|
tstart = LOWEST_SLAVE;
|
|
tstop = c_ptr->highest_slave;
|
|
}
|
|
}
|
|
exit:
|
|
buf_discard(buf);
|
|
}
|
|
|
|
int tipc_cltr_init(void)
|
|
{
|
|
tipc_highest_allowed_slave = LOWEST_SLAVE + tipc_max_slaves;
|
|
return tipc_cltr_create(tipc_own_addr) ? TIPC_OK : -ENOMEM;
|
|
}
|
|
|