3474753954
If net namespace is supported in tipc, each namespace will be treated as a separate tipc node. Therefore, every namespace must own its private tipc node address. This means the "tipc_own_addr" global variable of node address must be moved to tipc_net structure to satisfy the requirement. It's turned out that users also can assign node address for every namespace. Signed-off-by: Ying Xue <ying.xue@windriver.com> Tested-by: Tero Aho <Tero.Aho@coriant.com> Reviewed-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
146 lines
4.2 KiB
C
146 lines
4.2 KiB
C
/*
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* net/tipc/addr.c: TIPC address utility routines
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*
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* Copyright (c) 2000-2006, Ericsson AB
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* Copyright (c) 2004-2005, 2010-2011, 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 <linux/kernel.h>
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#include "addr.h"
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#include "core.h"
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/**
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* in_own_cluster - test for cluster inclusion; <0.0.0> always matches
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*/
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int in_own_cluster(struct net *net, u32 addr)
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{
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return in_own_cluster_exact(net, addr) || !addr;
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}
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int in_own_cluster_exact(struct net *net, u32 addr)
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{
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struct tipc_net *tn = net_generic(net, tipc_net_id);
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return !((addr ^ tn->own_addr) >> 12);
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}
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/**
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* in_own_node - test for node inclusion; <0.0.0> always matches
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*/
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int in_own_node(struct net *net, u32 addr)
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{
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struct tipc_net *tn = net_generic(net, tipc_net_id);
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return (addr == tn->own_addr) || !addr;
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}
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/**
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* addr_domain - convert 2-bit scope value to equivalent message lookup domain
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*
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* Needed when address of a named message must be looked up a second time
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* after a network hop.
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*/
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u32 addr_domain(struct net *net, u32 sc)
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{
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struct tipc_net *tn = net_generic(net, tipc_net_id);
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if (likely(sc == TIPC_NODE_SCOPE))
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return tn->own_addr;
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if (sc == TIPC_CLUSTER_SCOPE)
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return tipc_cluster_mask(tn->own_addr);
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return tipc_zone_mask(tn->own_addr);
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}
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/**
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* tipc_addr_domain_valid - validates a network domain address
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*
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* Accepts <Z.C.N>, <Z.C.0>, <Z.0.0>, and <0.0.0>,
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* where Z, C, and N are non-zero.
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*
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* Returns 1 if domain address is valid, otherwise 0
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*/
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int tipc_addr_domain_valid(u32 addr)
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{
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u32 n = tipc_node(addr);
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u32 c = tipc_cluster(addr);
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u32 z = tipc_zone(addr);
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if (n && (!z || !c))
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return 0;
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if (c && !z)
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return 0;
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return 1;
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}
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/**
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* tipc_addr_node_valid - validates a proposed network address for this node
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*
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* Accepts <Z.C.N>, where Z, C, and N are non-zero.
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*
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* Returns 1 if address can be used, otherwise 0
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*/
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int tipc_addr_node_valid(u32 addr)
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{
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return tipc_addr_domain_valid(addr) && tipc_node(addr);
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}
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int tipc_in_scope(u32 domain, u32 addr)
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{
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if (!domain || (domain == addr))
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return 1;
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if (domain == tipc_cluster_mask(addr)) /* domain <Z.C.0> */
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return 1;
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if (domain == tipc_zone_mask(addr)) /* domain <Z.0.0> */
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return 1;
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return 0;
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}
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/**
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* tipc_addr_scope - convert message lookup domain to a 2-bit scope value
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*/
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int tipc_addr_scope(u32 domain)
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{
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if (likely(!domain))
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return TIPC_ZONE_SCOPE;
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if (tipc_node(domain))
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return TIPC_NODE_SCOPE;
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if (tipc_cluster(domain))
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return TIPC_CLUSTER_SCOPE;
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return TIPC_ZONE_SCOPE;
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}
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char *tipc_addr_string_fill(char *string, u32 addr)
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{
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snprintf(string, 16, "<%u.%u.%u>",
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tipc_zone(addr), tipc_cluster(addr), tipc_node(addr));
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return string;
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}
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