1 files changed, 220 insertions, 0 deletions

diff --git a/net/tipc/bcast.h b/net/tipc/bcast.h
new file mode 100644
index 000000000000..cc2ede15c4fd
--- /dev/null
+++ b/net/tipc/bcast.h
@@ -0,0 +1,220 @@
+/*
+ * 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:
+ *
+ * Redistributions of source code must retain the above copyright notice, this 
+ * list of conditions and the following disclaimer.
+ * 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.
+ * 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.
+ *
+ * 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