summaryrefslogtreecommitdiffstats
path: root/net/tipc/bcast.h
blob: cd779816383f22ff18ae33b03e5d87c407cfe10a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
/*
 * net/tipc/bcast.h: Include file for TIPC broadcast code
 *
 * Copyright (c) 2003-2006, Ericsson AB
 * Copyright (c) 2005, Wind River Systems
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the names of the copyright holders nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _TIPC_BCAST_H
#define _TIPC_BCAST_H

#define MAX_NODES 4096
#define WSIZE 32

/**
 * struct tipc_node_map - set of node identifiers
 * @count: # of nodes in set
 * @map: bitmap of node identifiers that are in the set
 */

struct tipc_node_map {
	u32 count;
	u32 map[MAX_NODES / WSIZE];
};


#define PLSIZE 32

/**
 * struct port_list - set of node local destination ports
 * @count: # of ports in set (only valid for first entry in list)
 * @next: pointer to next entry in list
 * @ports: array of port references
 */

struct port_list {
	int count;
	struct port_list *next;
	u32 ports[PLSIZE];
};


struct tipc_node;

extern const char tipc_bclink_name[];

void tipc_nmap_add(struct tipc_node_map *nm_ptr, u32 node);
void tipc_nmap_remove(struct tipc_node_map *nm_ptr, u32 node);

/**
 * tipc_nmap_equal - test for equality of node maps
 */

static inline int tipc_nmap_equal(struct tipc_node_map *nm_a, struct tipc_node_map *nm_b)
{
	return !memcmp(nm_a, nm_b, sizeof(*nm_a));
}

void tipc_nmap_diff(struct tipc_node_map *nm_a, struct tipc_node_map *nm_b,
				  struct tipc_node_map *nm_diff);

/**
 * tipc_port_list_add - add a port to a port list, ensuring no duplicates
 */

static inline void tipc_port_list_add(struct port_list *pl_ptr, u32 port)
{
	struct port_list *item = pl_ptr;
	int i;
	int item_sz = PLSIZE;
	int cnt = pl_ptr->count;

	for (; ; cnt -= item_sz, item = item->next) {
		if (cnt < PLSIZE)
			item_sz = cnt;
		for (i = 0; i < item_sz; i++)
			if (item->ports[i] == port)
				return;
		if (i < PLSIZE) {
			item->ports[i] = port;
			pl_ptr->count++;
			return;
		}
		if (!item->next) {
			item->next = kmalloc(sizeof(*item), GFP_ATOMIC);
			if (!item->next) {
				warn("Incomplete multicast delivery, no memory\n");
				return;
			}
			item->next->next = NULL;
		}
	}
}

/**
 * tipc_port_list_free - free dynamically created entries in port_list chain
 *
 * Note: First item is on stack, so it doesn't need to be released
 */

static inline void tipc_port_list_free(struct port_list *pl_ptr)
{
	struct port_list *item;
	struct port_list *next;

	for (item = pl_ptr->next; item; item = next) {
		next = item->next;
		kfree(item);
	}
}


int  tipc_bclink_init(void);
void tipc_bclink_stop(void);
void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked);
int  tipc_bclink_send_msg(struct sk_buff *buf);
void tipc_bclink_recv_pkt(struct sk_buff *buf);
u32  tipc_bclink_get_last_sent(void);
u32  tipc_bclink_acks_missing(struct tipc_node *n_ptr);
void tipc_bclink_check_gap(struct tipc_node *n_ptr, u32 seqno);
int  tipc_bclink_stats(char *stats_buf, const u32 buf_size);
int  tipc_bclink_reset_stats(void);
int  tipc_bclink_set_queue_limits(u32 limit);
void tipc_bcbearer_sort(void);
void tipc_bcbearer_push(void);

#endif