aboutsummaryrefslogtreecommitdiffstats
path: root/net/tipc/bcast.h
blob: 27d1bba5c9452eed0182ad933317a102f54cbb15 (plain) (blame)
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
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
/*
 * net/tipc/bcast.h: Include file for TIPC broadcast code
 * 
 * Copyright (c) 2003-2005, Ericsson Research Canada
 * Copyright (c) 2005, Wind River Systems
 * Copyright (c) 2005-2006, Ericsson AB
 * 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 node_map - set of node identifiers
 * @count: # of nodes in set
 * @map: bitmap of node identifiers that are in the set
 */

struct 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 node;

extern char bc_link_name[];


/**
 * nmap_get - determine if node exists in a node map
 */

static inline int nmap_get(struct node_map *nm_ptr, u32 node)
{
	int n = tipc_node(node);
	int w = n / WSIZE;
	int b = n % WSIZE;

	return nm_ptr->map[w] & (1 << b);
}

/**
 * nmap_add - add a node to a node map
 */

static inline void nmap_add(struct node_map *nm_ptr, u32 node)
{
	int n = tipc_node(node);
	int w = n / WSIZE;
	u32 mask = (1 << (n % WSIZE));

	if ((nm_ptr->map[w] & mask) == 0) {
		nm_ptr->count++;
		nm_ptr->map[w] |= mask;
	}
}

/** 
 * nmap_remove - remove a node from a node map
 */

static inline void nmap_remove(struct node_map *nm_ptr, u32 node)
{
	int n = tipc_node(node);
	int w = n / WSIZE;
	u32 mask = (1 << (n % WSIZE));

	if ((nm_ptr->map[w] & mask) != 0) {
		nm_ptr->map[w] &= ~mask;
		nm_ptr->count--;
	}
}

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

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

/**
 * nmap_diff - find differences between node maps
 * @nm_a: input node map A
 * @nm_b: input node map B
 * @nm_diff: output node map A-B (i.e. nodes of A that are not in B)
 */

static inline void nmap_diff(struct node_map *nm_a, struct node_map *nm_b,
			     struct node_map *nm_diff)
{
	int stop = sizeof(nm_a->map) / sizeof(u32);
	int w;
	int b;
	u32 map;

	memset(nm_diff, 0, sizeof(*nm_diff));
	for (w = 0; w < stop; w++) {
		map = nm_a->map[w] ^ (nm_a->map[w] & nm_b->map[w]);
		nm_diff->map[w] = map;
		if (map != 0) {
			for (b = 0 ; b < WSIZE; b++) {
				if (map & (1 << b))
					nm_diff->count++;
			}
		}
	}
}

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

static inline void 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("Memory squeeze: multicast destination port list is incomplete\n");
				return;
			}
			item->next->next = NULL;
		}
	}
}

/**
 * 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 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  bclink_init(void);
void bclink_stop(void);
void bclink_acknowledge(struct node *n_ptr, u32 acked);
int  bclink_send_msg(struct sk_buff *buf);
void bclink_recv_pkt(struct sk_buff *buf);
u32  bclink_get_last_sent(void);
u32  bclink_acks_missing(struct node *n_ptr);
void bclink_check_gap(struct node *n_ptr, u32 seqno);
int  bclink_stats(char *stats_buf, const u32 buf_size);
int  bclink_reset_stats(void);
int  bclink_set_queue_limits(u32 limit);
void bcbearer_sort(void);
void bcbearer_push(void);

#endif