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When a topology server accepts a connection request from its client, it allocates a connection instance and a tipc_subscriber structure object. The former is used to communicate with client, and the latter is often treated as a subscriber which manages all subscription events requested from a same client. When a topology server receives a request of subscribing name services from a client through the connection, it creates a tipc_subscription structure instance which is seen as a subscription recording what name services are subscribed. In order to manage all subscriptions from a same client, topology server links them into the subscrp_list of the subscriber. So subscriber and subscription completely represents different meanings respectively, but function names associated with them make us so confused that we are unable to easily tell which function is against subscriber and which is to subscription. So we want to eliminate the confusion by renaming them. Signed-off-by: Ying Xue <ying.xue@windriver.com> Reviewed-by: Jon Maloy <jon.maloy@ericson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
84 lines
3.4 KiB
C
84 lines
3.4 KiB
C
/*
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* net/tipc/subscr.h: Include file for TIPC network topology service
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*
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* Copyright (c) 2003-2006, Ericsson AB
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* Copyright (c) 2005-2007, 2012-2013, 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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#ifndef _TIPC_SUBSCR_H
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#define _TIPC_SUBSCR_H
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#include "server.h"
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#define TIPC_MAX_SUBSCRIPTIONS 65535
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#define TIPC_MAX_PUBLICATIONS 65535
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struct tipc_subscription;
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struct tipc_subscriber;
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/**
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* struct tipc_subscription - TIPC network topology subscription object
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* @subscriber: pointer to its subscriber
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* @seq: name sequence associated with subscription
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* @net: point to network namespace
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* @timeout: duration of subscription (in ms)
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* @filter: event filtering to be done for subscription
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* @timer: timer governing subscription duration (optional)
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* @nameseq_list: adjacent subscriptions in name sequence's subscription list
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* @subscrp_list: adjacent subscriptions in subscriber's subscription list
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* @server_ref: object reference of server port associated with subscription
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* @swap: indicates if subscriber uses opposite endianness in its messages
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* @evt: template for events generated by subscription
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*/
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struct tipc_subscription {
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struct tipc_subscriber *subscriber;
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struct tipc_name_seq seq;
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struct net *net;
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unsigned long timeout;
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u32 filter;
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struct timer_list timer;
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struct list_head nameseq_list;
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struct list_head subscrp_list;
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int swap;
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struct tipc_event evt;
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};
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int tipc_subscrp_check_overlap(struct tipc_subscription *sub, u32 found_lower,
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u32 found_upper);
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void tipc_subscrp_report_overlap(struct tipc_subscription *sub,
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u32 found_lower, u32 found_upper, u32 event,
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u32 port_ref, u32 node, int must);
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int tipc_topsrv_start(struct net *net);
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void tipc_topsrv_stop(struct net *net);
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#endif
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