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122 lines
4.5 KiB
122 lines
4.5 KiB
/* |
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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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* Copyright (c) 2020-2021, Red Hat Inc |
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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_PUBL 65535 |
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struct publication; |
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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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* @s: host-endian copy of the user subscription |
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* @evt: template for events generated by subscription |
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* @kref: reference count for this subscription |
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* @net: network namespace associated with subscription |
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* @timer: timer governing subscription duration (optional) |
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* @service_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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* @conid: connection identifier of topology server |
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* @inactive: true if this subscription is inactive |
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* @lock: serialize up/down and timer events |
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*/ |
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struct tipc_subscription { |
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struct tipc_subscr s; |
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struct tipc_event evt; |
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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 service_list; |
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struct list_head sub_list; |
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int conid; |
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bool inactive; |
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spinlock_t lock; |
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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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void tipc_sub_report_overlap(struct tipc_subscription *sub, |
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struct publication *p, |
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u32 event, bool must); |
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int __net_init tipc_topsrv_init_net(struct net *net); |
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void __net_exit tipc_topsrv_exit_net(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_sub_write - write val_ to field_ of struct sub_ in user endian format |
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*/ |
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#define tipc_sub_write(sub_, field_, val_) \ |
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({ \ |
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struct tipc_subscr *sub__ = sub_; \ |
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u32 val__ = val_; \ |
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int swap_ = !((sub__)->filter & TIPC_FILTER_MASK); \ |
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(sub__)->field_ = 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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