mirror of https://gitee.com/openkylin/linux.git
109 lines
4.0 KiB
C
109 lines
4.0 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) 2003-2017, 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 "topsrv.h"
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#define TIPC_MAX_SUBSCR 65535
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#define TIPC_MAX_PUBLICATIONS 65535
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struct tipc_subscription;
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struct tipc_conn;
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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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* @timer: timer governing subscription duration (optional)
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* @nameseq_list: adjacent subscriptions in name sequence's subscription list
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* @sub_list: adjacent subscriptions in subscriber's subscription list
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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 kref kref;
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struct net *net;
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struct timer_list timer;
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struct list_head nameseq_list;
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struct list_head sub_list;
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struct tipc_event evt;
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int conid;
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bool inactive;
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spinlock_t lock; /* serialize up/down and timer events */
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};
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struct tipc_subscription *tipc_sub_subscribe(struct net *net,
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struct tipc_subscr *s,
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int conid);
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void tipc_sub_unsubscribe(struct tipc_subscription *sub);
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int tipc_sub_check_overlap(struct tipc_name_seq *seq, u32 found_lower,
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u32 found_upper);
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void tipc_sub_report_overlap(struct tipc_subscription *sub,
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u32 found_lower, u32 found_upper,
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u32 event, u32 port, u32 node,
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u32 scope, 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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void tipc_sub_put(struct tipc_subscription *subscription);
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void tipc_sub_get(struct tipc_subscription *subscription);
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#define TIPC_FILTER_MASK (TIPC_SUB_PORTS | TIPC_SUB_SERVICE | TIPC_SUB_CANCEL)
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/* tipc_sub_read - return field_ of struct sub_ in host endian format
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*/
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#define tipc_sub_read(sub_, field_) \
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({ \
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struct tipc_subscr *sub__ = sub_; \
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u32 val__ = (sub__)->field_; \
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int swap_ = !((sub__)->filter & TIPC_FILTER_MASK); \
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(swap_ ? swab32(val__) : val__); \
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})
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/* tipc_evt_write - write val_ to field_ of struct evt_ in user endian format
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*/
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#define tipc_evt_write(evt_, field_, val_) \
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({ \
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struct tipc_event *evt__ = evt_; \
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u32 val__ = val_; \
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int swap_ = !((evt__)->s.filter & (TIPC_FILTER_MASK)); \
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(evt__)->field_ = swap_ ? swab32(val__) : val__; \
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})
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#endif
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