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265 lines
9.8 KiB
265 lines
9.8 KiB
/* |
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* net/tipc/bearer.h: Include file for TIPC bearer code |
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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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#ifndef _TIPC_BEARER_H |
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#define _TIPC_BEARER_H |
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#include "netlink.h" |
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#include "core.h" |
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#include "msg.h" |
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#include <net/genetlink.h> |
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#define MAX_MEDIA 3 |
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/* Identifiers associated with TIPC message header media address info |
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* - address info field is 32 bytes long |
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* - the field's actual content and length is defined per media |
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* - remaining unused bytes in the field are set to zero |
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*/ |
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#define TIPC_MEDIA_INFO_SIZE 32 |
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#define TIPC_MEDIA_TYPE_OFFSET 3 |
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#define TIPC_MEDIA_ADDR_OFFSET 4 |
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/* |
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* Identifiers of supported TIPC media types |
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*/ |
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#define TIPC_MEDIA_TYPE_ETH 1 |
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#define TIPC_MEDIA_TYPE_IB 2 |
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#define TIPC_MEDIA_TYPE_UDP 3 |
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/* Minimum bearer MTU */ |
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#define TIPC_MIN_BEARER_MTU (MAX_H_SIZE + INT_H_SIZE) |
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/* Identifiers for distinguishing between broadcast/multicast and replicast |
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*/ |
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#define TIPC_BROADCAST_SUPPORT 1 |
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#define TIPC_REPLICAST_SUPPORT 2 |
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/** |
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* struct tipc_media_addr - destination address used by TIPC bearers |
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* @value: address info (format defined by media) |
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* @media_id: TIPC media type identifier |
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* @broadcast: non-zero if address is a broadcast address |
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*/ |
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struct tipc_media_addr { |
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u8 value[TIPC_MEDIA_INFO_SIZE]; |
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u8 media_id; |
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u8 broadcast; |
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}; |
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struct tipc_bearer; |
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/** |
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* struct tipc_media - Media specific info exposed to generic bearer layer |
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* @send_msg: routine which handles buffer transmission |
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* @enable_media: routine which enables a media |
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* @disable_media: routine which disables a media |
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* @addr2str: convert media address format to string |
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* @addr2msg: convert from media addr format to discovery msg addr format |
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* @msg2addr: convert from discovery msg addr format to media addr format |
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* @raw2addr: convert from raw addr format to media addr format |
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* @priority: default link (and bearer) priority |
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* @tolerance: default time (in ms) before declaring link failure |
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* @min_win: minimum window (in packets) before declaring link congestion |
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* @max_win: maximum window (in packets) before declaring link congestion |
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* @mtu: max packet size bearer can support for media type not dependent on |
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* underlying device MTU |
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* @type_id: TIPC media identifier |
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* @hwaddr_len: TIPC media address len |
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* @name: media name |
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*/ |
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struct tipc_media { |
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int (*send_msg)(struct net *net, struct sk_buff *buf, |
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struct tipc_bearer *b, |
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struct tipc_media_addr *dest); |
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int (*enable_media)(struct net *net, struct tipc_bearer *b, |
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struct nlattr *attr[]); |
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void (*disable_media)(struct tipc_bearer *b); |
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int (*addr2str)(struct tipc_media_addr *addr, |
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char *strbuf, |
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int bufsz); |
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int (*addr2msg)(char *msg, struct tipc_media_addr *addr); |
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int (*msg2addr)(struct tipc_bearer *b, |
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struct tipc_media_addr *addr, |
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char *msg); |
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int (*raw2addr)(struct tipc_bearer *b, |
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struct tipc_media_addr *addr, |
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char *raw); |
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u32 priority; |
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u32 tolerance; |
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u32 min_win; |
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u32 max_win; |
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u32 mtu; |
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u32 type_id; |
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u32 hwaddr_len; |
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char name[TIPC_MAX_MEDIA_NAME]; |
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}; |
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/** |
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* struct tipc_bearer - Generic TIPC bearer structure |
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* @media_ptr: pointer to additional media-specific information about bearer |
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* @mtu: max packet size bearer can support |
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* @addr: media-specific address associated with bearer |
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* @name: bearer name (format = media:interface) |
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* @media: ptr to media structure associated with bearer |
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* @bcast_addr: media address used in broadcasting |
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* @pt: packet type for bearer |
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* @rcu: rcu struct for tipc_bearer |
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* @priority: default link priority for bearer |
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* @min_win: minimum window (in packets) before declaring link congestion |
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* @max_win: maximum window (in packets) before declaring link congestion |
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* @tolerance: default link tolerance for bearer |
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* @domain: network domain to which links can be established |
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* @identity: array index of this bearer within TIPC bearer array |
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* @disc: ptr to link setup request |
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* @net_plane: network plane ('A' through 'H') currently associated with bearer |
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* @up: bearer up flag (bit 0) |
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* @refcnt: tipc_bearer reference counter |
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* |
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* Note: media-specific code is responsible for initialization of the fields |
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* indicated below when a bearer is enabled; TIPC's generic bearer code takes |
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* care of initializing all other fields. |
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*/ |
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struct tipc_bearer { |
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void __rcu *media_ptr; /* initialized by media */ |
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u32 mtu; /* initialized by media */ |
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struct tipc_media_addr addr; /* initialized by media */ |
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char name[TIPC_MAX_BEARER_NAME]; |
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struct tipc_media *media; |
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struct tipc_media_addr bcast_addr; |
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struct packet_type pt; |
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struct rcu_head rcu; |
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u32 priority; |
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u32 min_win; |
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u32 max_win; |
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u32 tolerance; |
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u32 domain; |
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u32 identity; |
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struct tipc_discoverer *disc; |
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char net_plane; |
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unsigned long up; |
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refcount_t refcnt; |
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}; |
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struct tipc_bearer_names { |
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char media_name[TIPC_MAX_MEDIA_NAME]; |
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char if_name[TIPC_MAX_IF_NAME]; |
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}; |
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/* |
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* TIPC routines available to supported media types |
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*/ |
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void tipc_rcv(struct net *net, struct sk_buff *skb, struct tipc_bearer *b); |
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/* |
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* Routines made available to TIPC by supported media types |
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*/ |
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extern struct tipc_media eth_media_info; |
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#ifdef CONFIG_TIPC_MEDIA_IB |
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extern struct tipc_media ib_media_info; |
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#endif |
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#ifdef CONFIG_TIPC_MEDIA_UDP |
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extern struct tipc_media udp_media_info; |
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#endif |
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int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info); |
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int __tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info); |
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int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info); |
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int __tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info); |
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int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb); |
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int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info); |
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int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info); |
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int __tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info); |
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int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info); |
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int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb); |
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int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info); |
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int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info); |
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int __tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info); |
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int tipc_media_set_priority(const char *name, u32 new_value); |
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int tipc_media_set_window(const char *name, u32 new_value); |
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int tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a); |
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int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b, |
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struct nlattr *attrs[]); |
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bool tipc_bearer_hold(struct tipc_bearer *b); |
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void tipc_bearer_put(struct tipc_bearer *b); |
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void tipc_disable_l2_media(struct tipc_bearer *b); |
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int tipc_l2_send_msg(struct net *net, struct sk_buff *buf, |
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struct tipc_bearer *b, struct tipc_media_addr *dest); |
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void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest); |
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void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest); |
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struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name); |
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int tipc_bearer_get_name(struct net *net, char *name, u32 bearer_id); |
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struct tipc_media *tipc_media_find(const char *name); |
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int tipc_bearer_setup(void); |
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void tipc_bearer_cleanup(void); |
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void tipc_bearer_stop(struct net *net); |
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int tipc_bearer_mtu(struct net *net, u32 bearer_id); |
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bool tipc_bearer_bcast_support(struct net *net, u32 bearer_id); |
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void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id, |
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struct sk_buff *skb, |
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struct tipc_media_addr *dest); |
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void tipc_bearer_xmit(struct net *net, u32 bearer_id, |
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struct sk_buff_head *xmitq, |
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struct tipc_media_addr *dst, |
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struct tipc_node *__dnode); |
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void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id, |
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struct sk_buff_head *xmitq); |
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void tipc_clone_to_loopback(struct net *net, struct sk_buff_head *pkts); |
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int tipc_attach_loopback(struct net *net); |
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void tipc_detach_loopback(struct net *net); |
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static inline void tipc_loopback_trace(struct net *net, |
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struct sk_buff_head *pkts) |
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{ |
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if (unlikely(dev_nit_active(net->loopback_dev))) |
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tipc_clone_to_loopback(net, pkts); |
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} |
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/* check if device MTU is too low for tipc headers */ |
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static inline bool tipc_mtu_bad(struct net_device *dev, unsigned int reserve) |
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{ |
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if (dev->mtu >= TIPC_MIN_BEARER_MTU + reserve) |
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return false; |
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netdev_warn(dev, "MTU too low for tipc bearer\n"); |
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return true; |
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} |
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#endif /* _TIPC_BEARER_H */
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