forked from luck/tmp_suning_uos_patched
cb1b728096
In a previous commit in this series we resolved a race problem during unicast message reception. Here, we resolve the same problem at multicast reception. We apply the same technique: an input queue serializing the delivery of arriving buffers. The main difference is that here we do it in two steps. First, the broadcast link feeds arriving buffers into the tail of an arrival queue, which head is consumed at the socket level, and where destination lookup is performed. Second, if the lookup is successful, the resulting buffer clones are fed into a second queue, the input queue. This queue is consumed at reception in the socket just like in the unicast case. Both queues are protected by the same lock, -the one of the input queue. Reviewed-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
62 lines
2.8 KiB
C
62 lines
2.8 KiB
C
/* net/tipc/socket.h: Include file for TIPC socket code
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*
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* Copyright (c) 2014-2015, Ericsson AB
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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_SOCK_H
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#define _TIPC_SOCK_H
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#include <net/sock.h>
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#include <net/genetlink.h>
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#define TIPC_CONNACK_INTV 256
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#define TIPC_FLOWCTRL_WIN (TIPC_CONNACK_INTV * 2)
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#define TIPC_CONN_OVERLOAD_LIMIT ((TIPC_FLOWCTRL_WIN * 2 + 1) * \
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SKB_TRUESIZE(TIPC_MAX_USER_MSG_SIZE))
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int tipc_socket_init(void);
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void tipc_socket_stop(void);
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int tipc_sock_create_local(struct net *net, int type, struct socket **res);
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void tipc_sock_release_local(struct socket *sock);
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int tipc_sock_accept_local(struct socket *sock, struct socket **newsock,
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int flags);
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int tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq);
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struct sk_buff *tipc_sk_socks_show(struct net *net);
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void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq,
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struct sk_buff_head *inputq);
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void tipc_sk_reinit(struct net *net);
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int tipc_sk_rht_init(struct net *net);
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void tipc_sk_rht_destroy(struct net *net);
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int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb);
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int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb);
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#endif
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