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901271e040
In previous commit, we changed the default emulated MTU for UDP bearers to 14k. This commit adds the functionality to set/change the default value by configuring new MTU for UDP media. UDP bearer(s) have to be disabled and enabled back for the new MTU to take effect. Acked-by: Ying Xue <ying.xue@windriver.com> Acked-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: GhantaKrishnamurthy MohanKrishna <mohan.krishna.ghanta.krishnamurthy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
60 lines
2.5 KiB
C
60 lines
2.5 KiB
C
/*
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* net/tipc/udp_media.h: Include file for UDP bearer media
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*
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* Copyright (c) 1996-2006, 2013-2016, 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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#ifdef CONFIG_TIPC_MEDIA_UDP
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#ifndef _TIPC_UDP_MEDIA_H
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#define _TIPC_UDP_MEDIA_H
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#include <linux/ip.h>
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#include <linux/udp.h>
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int tipc_udp_nl_bearer_add(struct tipc_bearer *b, struct nlattr *attr);
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int tipc_udp_nl_add_bearer_data(struct tipc_nl_msg *msg, struct tipc_bearer *b);
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int tipc_udp_nl_dump_remoteip(struct sk_buff *skb, struct netlink_callback *cb);
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/* check if configured MTU is too low for tipc headers */
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static inline bool tipc_udp_mtu_bad(u32 mtu)
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{
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if (mtu >= (TIPC_MIN_BEARER_MTU + sizeof(struct iphdr) +
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sizeof(struct udphdr)))
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return false;
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pr_warn("MTU too low for tipc bearer\n");
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return true;
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}
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#endif
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#endif
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