2 * net/tipc/bcast.h: Include file for TIPC broadcast code
4 * Copyright (c) 2003-2006, Ericsson AB
5 * Copyright (c) 2005, Wind River Systems
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9 * modification, are permitted provided that the following conditions are met:
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17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
20 * Alternatively, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation.
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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40 #define MAX_NODES 4096
44 * struct node_map - set of node identifiers
45 * @count: # of nodes in set
46 * @map: bitmap of node identifiers that are in the set
51 u32 map[MAX_NODES / WSIZE];
58 * struct port_list - set of node local destination ports
59 * @count: # of ports in set (only valid for first entry in list)
60 * @next: pointer to next entry in list
61 * @ports: array of port references
66 struct port_list *next;
73 extern char tipc_bclink_name[];
77 * nmap_get - determine if node exists in a node map
80 static inline int tipc_nmap_get(struct node_map *nm_ptr, u32 node)
82 int n = tipc_node(node);
86 return nm_ptr->map[w] & (1 << b);
90 * nmap_add - add a node to a node map
93 static inline void tipc_nmap_add(struct node_map *nm_ptr, u32 node)
95 int n = tipc_node(node);
97 u32 mask = (1 << (n % WSIZE));
99 if ((nm_ptr->map[w] & mask) == 0) {
101 nm_ptr->map[w] |= mask;
106 * nmap_remove - remove a node from a node map
109 static inline void tipc_nmap_remove(struct node_map *nm_ptr, u32 node)
111 int n = tipc_node(node);
113 u32 mask = (1 << (n % WSIZE));
115 if ((nm_ptr->map[w] & mask) != 0) {
116 nm_ptr->map[w] &= ~mask;
122 * nmap_equal - test for equality of node maps
125 static inline int tipc_nmap_equal(struct node_map *nm_a, struct node_map *nm_b)
127 return !memcmp(nm_a, nm_b, sizeof(*nm_a));
131 * nmap_diff - find differences between node maps
132 * @nm_a: input node map A
133 * @nm_b: input node map B
134 * @nm_diff: output node map A-B (i.e. nodes of A that are not in B)
137 static inline void tipc_nmap_diff(struct node_map *nm_a, struct node_map *nm_b,
138 struct node_map *nm_diff)
140 int stop = sizeof(nm_a->map) / sizeof(u32);
145 memset(nm_diff, 0, sizeof(*nm_diff));
146 for (w = 0; w < stop; w++) {
147 map = nm_a->map[w] ^ (nm_a->map[w] & nm_b->map[w]);
148 nm_diff->map[w] = map;
150 for (b = 0 ; b < WSIZE; b++) {
159 * port_list_add - add a port to a port list, ensuring no duplicates
162 static inline void tipc_port_list_add(struct port_list *pl_ptr, u32 port)
164 struct port_list *item = pl_ptr;
166 int item_sz = PLSIZE;
167 int cnt = pl_ptr->count;
169 for (; ; cnt -= item_sz, item = item->next) {
172 for (i = 0; i < item_sz; i++)
173 if (item->ports[i] == port)
176 item->ports[i] = port;
181 item->next = kmalloc(sizeof(*item), GFP_ATOMIC);
183 warn("Incomplete multicast delivery, no memory\n");
186 item->next->next = NULL;
192 * port_list_free - free dynamically created entries in port_list chain
194 * Note: First item is on stack, so it doesn't need to be released
197 static inline void tipc_port_list_free(struct port_list *pl_ptr)
199 struct port_list *item;
200 struct port_list *next;
202 for (item = pl_ptr->next; item; item = next) {
209 int tipc_bclink_init(void);
210 void tipc_bclink_stop(void);
211 void tipc_bclink_acknowledge(struct node *n_ptr, u32 acked);
212 int tipc_bclink_send_msg(struct sk_buff *buf);
213 void tipc_bclink_recv_pkt(struct sk_buff *buf);
214 u32 tipc_bclink_get_last_sent(void);
215 u32 tipc_bclink_acks_missing(struct node *n_ptr);
216 void tipc_bclink_check_gap(struct node *n_ptr, u32 seqno);
217 int tipc_bclink_stats(char *stats_buf, const u32 buf_size);
218 int tipc_bclink_reset_stats(void);
219 int tipc_bclink_set_queue_limits(u32 limit);
220 void tipc_bcbearer_sort(void);
221 void tipc_bcbearer_push(void);