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078bec826f
We add a new broadcast link transmit function in bclink.c and a new receive function in socket.c. The purpose is to move the branching between external and internal destination down to the link layer, just as we have done with unicast in earlier commits. We also make use of the new link-independent fragmentation support that was introduced in an earlier commit series. This gives a shorter and simpler code path, and makes it possible to obtain copy-free buffer delivery to all node local destination sockets. The new transmission code is added in parallel with the existing one, and will be used by the socket multicast send function in the next commit in this series. Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Reviewed-by: Erik Hugne <erik.hugne@ericsson.com> Reviewed-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
104 lines
3.7 KiB
C
104 lines
3.7 KiB
C
/*
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* net/tipc/bcast.h: Include file for TIPC broadcast code
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*
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* Copyright (c) 2003-2006, 2014, Ericsson AB
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* Copyright (c) 2005, 2010-2011, Wind River Systems
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the names of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _TIPC_BCAST_H
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#define _TIPC_BCAST_H
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#define MAX_NODES 4096
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#define WSIZE 32
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#define TIPC_BCLINK_RESET 1
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/**
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* struct tipc_node_map - set of node identifiers
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* @count: # of nodes in set
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* @map: bitmap of node identifiers that are in the set
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*/
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struct tipc_node_map {
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u32 count;
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u32 map[MAX_NODES / WSIZE];
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};
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#define PLSIZE 32
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/**
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* struct tipc_port_list - set of node local destination ports
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* @count: # of ports in set (only valid for first entry in list)
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* @next: pointer to next entry in list
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* @ports: array of port references
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*/
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struct tipc_port_list {
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int count;
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struct tipc_port_list *next;
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u32 ports[PLSIZE];
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};
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struct tipc_node;
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extern const char tipc_bclink_name[];
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/**
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* tipc_nmap_equal - test for equality of node maps
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*/
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static inline int tipc_nmap_equal(struct tipc_node_map *nm_a,
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struct tipc_node_map *nm_b)
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{
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return !memcmp(nm_a, nm_b, sizeof(*nm_a));
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}
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void tipc_port_list_add(struct tipc_port_list *pl_ptr, u32 port);
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void tipc_port_list_free(struct tipc_port_list *pl_ptr);
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int tipc_bclink_init(void);
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void tipc_bclink_stop(void);
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void tipc_bclink_set_flags(unsigned int flags);
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void tipc_bclink_add_node(u32 addr);
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void tipc_bclink_remove_node(u32 addr);
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struct tipc_node *tipc_bclink_retransmit_to(void);
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void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked);
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int tipc_bclink_xmit(struct sk_buff *buf);
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void tipc_bclink_rcv(struct sk_buff *buf);
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u32 tipc_bclink_get_last_sent(void);
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u32 tipc_bclink_acks_missing(struct tipc_node *n_ptr);
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void tipc_bclink_update_link_state(struct tipc_node *n_ptr, u32 last_sent);
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int tipc_bclink_stats(char *stats_buf, const u32 buf_size);
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int tipc_bclink_reset_stats(void);
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int tipc_bclink_set_queue_limits(u32 limit);
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void tipc_bcbearer_sort(struct tipc_node_map *nm_ptr, u32 node, bool action);
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uint tipc_bclink_get_mtu(void);
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int tipc_bclink_xmit2(struct sk_buff *buf);
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#endif
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