214 lines
7.5 KiB
C
214 lines
7.5 KiB
C
/*
|
|
* net/tipc/bearer.h: Include file for TIPC bearer code
|
|
*
|
|
* Copyright (c) 1996-2006, Ericsson AB
|
|
* Copyright (c) 2005, 2010-2011, Wind River Systems
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. 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.
|
|
* 3. 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.
|
|
*
|
|
* Alternatively, this software may be distributed under the terms of the
|
|
* GNU General Public License ("GPL") version 2 as published by the Free
|
|
* Software Foundation.
|
|
*
|
|
* 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_BEARER_H
|
|
#define _TIPC_BEARER_H
|
|
|
|
#include "bcast.h"
|
|
|
|
#define MAX_BEARERS 2
|
|
#define MAX_MEDIA 2
|
|
|
|
/*
|
|
* Identifiers associated with TIPC message header media address info
|
|
*
|
|
* - address info field is 20 bytes long
|
|
* - media type identifier located at offset 3
|
|
* - remaining bytes vary according to media type
|
|
*/
|
|
#define TIPC_MEDIA_ADDR_SIZE 20
|
|
#define TIPC_MEDIA_TYPE_OFFSET 3
|
|
|
|
/*
|
|
* Identifiers of supported TIPC media types
|
|
*/
|
|
#define TIPC_MEDIA_TYPE_ETH 1
|
|
#define TIPC_MEDIA_TYPE_IB 2
|
|
|
|
/**
|
|
* struct tipc_media_addr - destination address used by TIPC bearers
|
|
* @value: address info (format defined by media)
|
|
* @media_id: TIPC media type identifier
|
|
* @broadcast: non-zero if address is a broadcast address
|
|
*/
|
|
struct tipc_media_addr {
|
|
u8 value[TIPC_MEDIA_ADDR_SIZE];
|
|
u8 media_id;
|
|
u8 broadcast;
|
|
};
|
|
|
|
struct tipc_bearer;
|
|
|
|
/**
|
|
* struct tipc_media - TIPC media information available to internal users
|
|
* @send_msg: routine which handles buffer transmission
|
|
* @enable_bearer: routine which enables a bearer
|
|
* @disable_bearer: routine which disables a bearer
|
|
* @addr2str: routine which converts media address to string
|
|
* @addr2msg: routine which converts media address to protocol message area
|
|
* @msg2addr: routine which converts media address from protocol message area
|
|
* @bcast_addr: media address used in broadcasting
|
|
* @priority: default link (and bearer) priority
|
|
* @tolerance: default time (in ms) before declaring link failure
|
|
* @window: default window (in packets) before declaring link congestion
|
|
* @type_id: TIPC media identifier
|
|
* @name: media name
|
|
*/
|
|
struct tipc_media {
|
|
int (*send_msg)(struct sk_buff *buf,
|
|
struct tipc_bearer *b_ptr,
|
|
struct tipc_media_addr *dest);
|
|
int (*enable_bearer)(struct tipc_bearer *b_ptr);
|
|
void (*disable_bearer)(struct tipc_bearer *b_ptr);
|
|
int (*addr2str)(struct tipc_media_addr *a, char *str_buf, int str_size);
|
|
int (*addr2msg)(struct tipc_media_addr *a, char *msg_area);
|
|
int (*msg2addr)(const struct tipc_bearer *b_ptr,
|
|
struct tipc_media_addr *a, char *msg_area);
|
|
u32 priority;
|
|
u32 tolerance;
|
|
u32 window;
|
|
u32 type_id;
|
|
char name[TIPC_MAX_MEDIA_NAME];
|
|
};
|
|
|
|
/**
|
|
* struct tipc_bearer - TIPC bearer structure
|
|
* @usr_handle: pointer to additional media-specific information about bearer
|
|
* @mtu: max packet size bearer can support
|
|
* @blocked: non-zero if bearer is blocked
|
|
* @lock: spinlock for controlling access to bearer
|
|
* @addr: media-specific address associated with bearer
|
|
* @name: bearer name (format = media:interface)
|
|
* @media: ptr to media structure associated with bearer
|
|
* @priority: default link priority for bearer
|
|
* @window: default window size for bearer
|
|
* @tolerance: default link tolerance for bearer
|
|
* @identity: array index of this bearer within TIPC bearer array
|
|
* @link_req: ptr to (optional) structure making periodic link setup requests
|
|
* @links: list of non-congested links associated with bearer
|
|
* @active: non-zero if bearer structure is represents a bearer
|
|
* @net_plane: network plane ('A' through 'H') currently associated with bearer
|
|
* @nodes: indicates which nodes in cluster can be reached through bearer
|
|
*
|
|
* Note: media-specific code is responsible for initialization of the fields
|
|
* indicated below when a bearer is enabled; TIPC's generic bearer code takes
|
|
* care of initializing all other fields.
|
|
*/
|
|
struct tipc_bearer {
|
|
void *usr_handle; /* initalized by media */
|
|
u32 mtu; /* initalized by media */
|
|
int blocked; /* initalized by media */
|
|
struct tipc_media_addr addr; /* initalized by media */
|
|
char name[TIPC_MAX_BEARER_NAME];
|
|
spinlock_t lock;
|
|
struct tipc_media *media;
|
|
struct tipc_media_addr bcast_addr;
|
|
u32 priority;
|
|
u32 window;
|
|
u32 tolerance;
|
|
u32 identity;
|
|
struct tipc_link_req *link_req;
|
|
struct list_head links;
|
|
int active;
|
|
char net_plane;
|
|
struct tipc_node_map nodes;
|
|
};
|
|
|
|
struct tipc_bearer_names {
|
|
char media_name[TIPC_MAX_MEDIA_NAME];
|
|
char if_name[TIPC_MAX_IF_NAME];
|
|
};
|
|
|
|
struct tipc_link;
|
|
|
|
extern struct tipc_bearer tipc_bearers[];
|
|
|
|
/*
|
|
* TIPC routines available to supported media types
|
|
*/
|
|
int tipc_register_media(struct tipc_media *m_ptr);
|
|
|
|
void tipc_recv_msg(struct sk_buff *buf, struct tipc_bearer *tb_ptr);
|
|
|
|
int tipc_block_bearer(const char *name);
|
|
void tipc_continue(struct tipc_bearer *tb_ptr);
|
|
|
|
int tipc_enable_bearer(const char *bearer_name, u32 disc_domain, u32 priority);
|
|
int tipc_disable_bearer(const char *name);
|
|
|
|
/*
|
|
* Routines made available to TIPC by supported media types
|
|
*/
|
|
int tipc_eth_media_start(void);
|
|
void tipc_eth_media_stop(void);
|
|
|
|
#ifdef CONFIG_TIPC_MEDIA_IB
|
|
int tipc_ib_media_start(void);
|
|
void tipc_ib_media_stop(void);
|
|
#else
|
|
static inline int tipc_ib_media_start(void) { return 0; }
|
|
static inline void tipc_ib_media_stop(void) { return; }
|
|
#endif
|
|
|
|
int tipc_media_set_priority(const char *name, u32 new_value);
|
|
int tipc_media_set_window(const char *name, u32 new_value);
|
|
void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a);
|
|
struct sk_buff *tipc_media_get_names(void);
|
|
|
|
struct sk_buff *tipc_bearer_get_names(void);
|
|
void tipc_bearer_add_dest(struct tipc_bearer *b_ptr, u32 dest);
|
|
void tipc_bearer_remove_dest(struct tipc_bearer *b_ptr, u32 dest);
|
|
struct tipc_bearer *tipc_bearer_find(const char *name);
|
|
struct tipc_bearer *tipc_bearer_find_interface(const char *if_name);
|
|
struct tipc_media *tipc_media_find(const char *name);
|
|
int tipc_bearer_blocked(struct tipc_bearer *b_ptr);
|
|
void tipc_bearer_stop(void);
|
|
|
|
/**
|
|
* tipc_bearer_send- sends buffer to destination over bearer
|
|
*
|
|
* IMPORTANT:
|
|
* The media send routine must not alter the buffer being passed in
|
|
* as it may be needed for later retransmission!
|
|
*/
|
|
static inline void tipc_bearer_send(struct tipc_bearer *b, struct sk_buff *buf,
|
|
struct tipc_media_addr *dest)
|
|
{
|
|
b->media->send_msg(buf, b, dest);
|
|
}
|
|
|
|
#endif /* _TIPC_BEARER_H */
|