1 /* 1 /*
2 * net/tipc/subscr.h: Include file for TIPC ne 2 * net/tipc/subscr.h: Include file for TIPC network topology service
3 * 3 *
4 * Copyright (c) 2003-2017, Ericsson AB 4 * Copyright (c) 2003-2017, Ericsson AB
5 * Copyright (c) 2005-2007, 2012-2013, Wind Ri 5 * Copyright (c) 2005-2007, 2012-2013, Wind River Systems
6 * Copyright (c) 2020-2021, Red Hat Inc <<
7 * All rights reserved. 6 * All rights reserved.
8 * 7 *
9 * Redistribution and use in source and binary 8 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that t 9 * modification, are permitted provided that the following conditions are met:
11 * 10 *
12 * 1. Redistributions of source code must reta 11 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the 12 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must repr 13 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the 14 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials pro 15 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the names of the copyright holde 16 * 3. Neither the names of the copyright holders nor the names of its
18 * contributors may be used to endorse or p 17 * contributors may be used to endorse or promote products derived from
19 * this software without specific prior wri 18 * this software without specific prior written permission.
20 * 19 *
21 * Alternatively, this software may be distrib 20 * Alternatively, this software may be distributed under the terms of the
22 * GNU General Public License ("GPL") version 21 * GNU General Public License ("GPL") version 2 as published by the Free
23 * Software Foundation. 22 * Software Foundation.
24 * 23 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
26 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCL 25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND F 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYR 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
29 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL 28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT L 29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THE 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUD 32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS S 33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE. 34 * POSSIBILITY OF SUCH DAMAGE.
36 */ 35 */
37 36
38 #ifndef _TIPC_SUBSCR_H 37 #ifndef _TIPC_SUBSCR_H
39 #define _TIPC_SUBSCR_H 38 #define _TIPC_SUBSCR_H
40 39
41 #include "topsrv.h" 40 #include "topsrv.h"
42 41
43 #define TIPC_MAX_SUBSCR 65535 42 #define TIPC_MAX_SUBSCR 65535
44 #define TIPC_MAX_PUBL 65535 43 #define TIPC_MAX_PUBL 65535
45 44
46 struct publication; <<
47 struct tipc_subscription; 45 struct tipc_subscription;
48 struct tipc_conn; 46 struct tipc_conn;
49 47
50 /** 48 /**
51 * struct tipc_subscription - TIPC network top 49 * struct tipc_subscription - TIPC network topology subscription object
52 * @s: host-endian copy of the user subscripti !! 50 * @subscriber: pointer to its subscriber
53 * @evt: template for events generated by subs !! 51 * @seq: name sequence associated with subscription
54 * @kref: reference count for this subscriptio <<
55 * @net: network namespace associated with sub <<
56 * @timer: timer governing subscription durati 52 * @timer: timer governing subscription duration (optional)
57 * @service_list: adjacent subscriptions in na !! 53 * @nameseq_list: adjacent subscriptions in name sequence's subscription list
58 * @sub_list: adjacent subscriptions in subscr 54 * @sub_list: adjacent subscriptions in subscriber's subscription list
59 * @conid: connection identifier of topology s !! 55 * @evt: template for events generated by subscription
60 * @inactive: true if this subscription is ina <<
61 * @lock: serialize up/down and timer events <<
62 */ 56 */
63 struct tipc_subscription { 57 struct tipc_subscription {
64 struct tipc_subscr s; <<
65 struct tipc_event evt; <<
66 struct kref kref; 58 struct kref kref;
67 struct net *net; 59 struct net *net;
68 struct timer_list timer; 60 struct timer_list timer;
69 struct list_head service_list; 61 struct list_head service_list;
70 struct list_head sub_list; 62 struct list_head sub_list;
>> 63 struct tipc_event evt;
71 int conid; 64 int conid;
72 bool inactive; 65 bool inactive;
73 spinlock_t lock; !! 66 spinlock_t lock; /* serialize up/down and timer events */
74 }; 67 };
75 68
76 struct tipc_subscription *tipc_sub_subscribe(s 69 struct tipc_subscription *tipc_sub_subscribe(struct net *net,
77 s 70 struct tipc_subscr *s,
78 i 71 int conid);
79 void tipc_sub_unsubscribe(struct tipc_subscrip 72 void tipc_sub_unsubscribe(struct tipc_subscription *sub);
>> 73
>> 74 int tipc_sub_check_overlap(struct tipc_name_seq *seq, u32 found_lower,
>> 75 u32 found_upper);
80 void tipc_sub_report_overlap(struct tipc_subsc 76 void tipc_sub_report_overlap(struct tipc_subscription *sub,
81 struct publicatio !! 77 u32 found_lower, u32 found_upper,
82 u32 event, bool m !! 78 u32 event, u32 port, u32 node,
>> 79 u32 scope, int must);
83 80
84 int __net_init tipc_topsrv_init_net(struct net 81 int __net_init tipc_topsrv_init_net(struct net *net);
85 void __net_exit tipc_topsrv_exit_net(struct ne 82 void __net_exit tipc_topsrv_exit_net(struct net *net);
86 83
87 void tipc_sub_put(struct tipc_subscription *su 84 void tipc_sub_put(struct tipc_subscription *subscription);
88 void tipc_sub_get(struct tipc_subscription *su 85 void tipc_sub_get(struct tipc_subscription *subscription);
89 86
90 #define TIPC_FILTER_MASK (TIPC_SUB_PORTS | TIP 87 #define TIPC_FILTER_MASK (TIPC_SUB_PORTS | TIPC_SUB_SERVICE | TIPC_SUB_CANCEL)
91 88
92 /* tipc_sub_read - return field_ of struct sub 89 /* tipc_sub_read - return field_ of struct sub_ in host endian format
93 */ 90 */
94 #define tipc_sub_read(sub_, field_) 91 #define tipc_sub_read(sub_, field_) \
95 ({ 92 ({ \
96 struct tipc_subscr *sub__ = su 93 struct tipc_subscr *sub__ = sub_; \
97 u32 val__ = (sub__)->field_; 94 u32 val__ = (sub__)->field_; \
98 int swap_ = !((sub__)->filter 95 int swap_ = !((sub__)->filter & TIPC_FILTER_MASK); \
99 (swap_ ? swab32(val__) : val__ 96 (swap_ ? swab32(val__) : val__); \
100 }) <<
101 <<
102 /* tipc_sub_write - write val_ to field_ of st <<
103 */ <<
104 #define tipc_sub_write(sub_, field_, val_) <<
105 ({ <<
106 struct tipc_subscr *sub__ = su <<
107 u32 val__ = val_; <<
108 int swap_ = !((sub__)->filter <<
109 (sub__)->field_ = swap_ ? swab <<
110 }) 97 })
111 98
112 /* tipc_evt_write - write val_ to field_ of st 99 /* tipc_evt_write - write val_ to field_ of struct evt_ in user endian format
113 */ 100 */
114 #define tipc_evt_write(evt_, field_, val_) 101 #define tipc_evt_write(evt_, field_, val_) \
115 ({ 102 ({ \
116 struct tipc_event *evt__ = evt 103 struct tipc_event *evt__ = evt_; \
117 u32 val__ = val_; 104 u32 val__ = val_; \
118 int swap_ = !((evt__)->s.filte 105 int swap_ = !((evt__)->s.filter & (TIPC_FILTER_MASK)); \
119 (evt__)->field_ = swap_ ? swab 106 (evt__)->field_ = swap_ ? swab32(val__) : val__; \
120 }) 107 })
121 108
122 #endif 109 #endif
123 110
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