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Commit b97bf3fd authored by Per Liden's avatar Per Liden Committed by David S. Miller
Browse files

[TIPC] Initial merge 

TIPC (Transparent Inter Process Communication) is a protocol designed for
intra cluster communication. For more information see
http://tipc.sourceforge.net



Signed-off-by: default avatarPer Liden <per.liden@nospam.ericsson.com>
parent 58cba465

include/linux/socket.h

+3 −0
Original line number Diff line number Diff line
@@ -186,6 +186,7 @@ struct ucred { 
#define AF_PPPOX	24	/* PPPoX sockets		*/

#define AF_WANPIPE	25	/* Wanpipe API Sockets */

#define AF_LLC		26	/* Linux LLC			*/

#define AF_TIPC		30	/* TIPC sockets			*/

#define AF_BLUETOOTH	31	/* Bluetooth sockets 		*/

#define AF_MAX		32	/* For now.. */
@@ -218,6 +219,7 @@ struct ucred { 
#define PF_PPPOX	AF_PPPOX

#define PF_WANPIPE	AF_WANPIPE

#define PF_LLC		AF_LLC

#define PF_TIPC		AF_TIPC

#define PF_BLUETOOTH	AF_BLUETOOTH

#define PF_MAX		AF_MAX
@@ -279,6 +281,7 @@ struct ucred { 
#define SOL_LLC		268

#define SOL_DCCP	269

#define SOL_NETLINK	270

#define SOL_TIPC	271



/* IPX options */

#define IPX_TYPE	1

include/linux/tipc.h

0 → 100644
+598 −0
Original line number Diff line number Diff line 
/*

 * include/linux/tipc.h: Include file for TIPC users

 * 

 * Copyright (c) 2003-2005, Ericsson Research Canada

 * Copyright (c) 2005, Wind River Systems

 * Copyright (c) 2005-2006, Ericsson AB

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without 

 * modification, are permitted provided that the following conditions are met:

 *

 * Redistributions of source code must retain the above copyright notice, this 

 * list of conditions and the following disclaimer.

 * 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.

 * 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.

 *

 * 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 _LINUX_TIPC_H_

#define _LINUX_TIPC_H_



#include <linux/types.h>

#include <linux/string.h>

#include <asm/byteorder.h>



/*

 * TIPC addressing primitives

 */

 

struct tipc_portid {

	__u32 ref;

	__u32 node;

};



struct tipc_name {

	__u32 type;

	__u32 instance;

};



struct tipc_name_seq {

	__u32 type;

	__u32 lower;

	__u32 upper;

};



static inline __u32 tipc_addr(unsigned int zone,

			      unsigned int cluster,

			      unsigned int node)

{

	return(zone << 24) | (cluster << 12) | node;

}



static inline unsigned int tipc_zone(__u32 addr)

{

	return  addr >> 24;

}



static inline unsigned int tipc_cluster(__u32 addr)

{

	return(addr >> 12) & 0xfff;

}



static inline unsigned int tipc_node(__u32 addr)

{

	return  addr & 0xfff;

}



/*

 * Application-accessible port name types

 */



#define TIPC_NET_EVENTS		0	/* network event subscription name type */

#define TIPC_TOP_SRV         	1  	/* topology service name type */

#define TIPC_RESERVED_TYPES	64	/* lowest user-publishable name type */



/* 

 * Publication scopes when binding port names and port name sequences

 */



#define TIPC_ZONE_SCOPE         1

#define TIPC_CLUSTER_SCOPE      2     

#define TIPC_NODE_SCOPE         3



/*

 * Limiting values for messages

 */



#define TIPC_MAX_USER_MSG_SIZE 66000



/* 

 * Message importance levels

 */



#define TIPC_LOW_IMPORTANCE     	0  /* default */

#define TIPC_MEDIUM_IMPORTANCE		1

#define TIPC_HIGH_IMPORTANCE		2

#define TIPC_CRITICAL_IMPORTANCE	3



/* 

 * Msg rejection/connection shutdown reasons

 */



#define TIPC_OK			0

#define TIPC_ERR_NO_NAME	1

#define TIPC_ERR_NO_PORT	2

#define TIPC_ERR_NO_NODE	3

#define TIPC_ERR_OVERLOAD	4

#define TIPC_CONN_SHUTDOWN	5



/*

 * TIPC topology subscription service definitions

 */



#define TIPC_SUB_PORTS     	0x01  	/* filter for port availability */

#define TIPC_SUB_SERVICE     	0x02  	/* filter for service availability */

#if 0

/* The following filter options are not currently implemented */

#define TIPC_SUB_NO_BIND_EVTS	0x04	/* filter out "publish" events */

#define TIPC_SUB_NO_UNBIND_EVTS	0x08	/* filter out "withdraw" events */

#define TIPC_SUB_SINGLE_EVT	0x10	/* expire after first event */

#endif



#define TIPC_WAIT_FOREVER   	~0	/* timeout for permanent subscription */



struct tipc_subscr {

	struct tipc_name_seq seq;	/* name sequence of interest */

	__u32 timeout;			/* subscription duration (in ms) */

        __u32 filter;   		/* bitmask of filter options */

	char usr_handle[8];		/* available for subscriber use */

};





#define TIPC_PUBLISHED          1	/* publication event */

#define TIPC_WITHDRAWN          2	/* withdraw event */

#define TIPC_SUBSCR_TIMEOUT     3	/* subscription timeout event */



struct tipc_event {

	__u32 event;			/* event type */

	__u32 found_lower;		/* matching name seq instances */

	__u32 found_upper;		/*    "      "    "     "      */

        struct tipc_portid port;	/* associated port */

	struct tipc_subscr s;		/* associated subscription */

};



/*

 * Socket API

 */



#ifndef AF_TIPC

#define AF_TIPC		30

#endif



#ifndef PF_TIPC

#define PF_TIPC		AF_TIPC

#endif



#ifndef SOL_TIPC

#define SOL_TIPC	271

#endif



#define TIPC_ADDR_NAMESEQ   	1

#define TIPC_ADDR_MCAST         1

#define TIPC_ADDR_NAME      	2

#define TIPC_ADDR_ID        	3



struct sockaddr_tipc {

	unsigned short family;

	unsigned char  addrtype;

	signed   char  scope;

	union {

		struct tipc_portid id;

		struct tipc_name_seq nameseq;

		struct {

			struct tipc_name name;

			__u32 domain; /* 0: own zone */

		} name;

	} addr;

};



/*

 * Ancillary data objects supported by recvmsg()

 */



#define TIPC_ERRINFO	1	/* error info */

#define TIPC_RETDATA	2	/* returned data */

#define TIPC_DESTNAME	3	/* destination name */



/*

 * TIPC-specific socket option values

 */



#define TIPC_IMPORTANCE		127	/* Default: TIPC_LOW_IMPORTANCE */

#define TIPC_SRC_DROPPABLE	128	/* Default: 0 (resend congested msg) */

#define TIPC_DEST_DROPPABLE	129	/* Default: based on socket type */

#define TIPC_CONN_TIMEOUT     	130	/* Default: 8000 (ms)  */



/*

 * Bearer

 */



/* Identifiers of supported TIPC media types */



#define TIPC_MEDIA_TYPE_ETH	1



/* Maximum sizes of TIPC bearer-related names (including terminating NUL) */ 



#define TIPC_MAX_MEDIA_NAME	16	/* format = media */

#define TIPC_MAX_IF_NAME	16	/* format = interface */

#define TIPC_MAX_BEARER_NAME	32	/* format = media:interface */

#define TIPC_MAX_LINK_NAME	60	/* format = Z.C.N:interface-Z.C.N:interface */



struct tipc_media_addr {

	__u32  type;

	union {

		__u8   eth_addr[6];	/* Ethernet bearer */ 

#if 0

		/* Prototypes for other possible bearer types */



		struct {

			__u16 sin_family;

			__u16 sin_port;

			struct {

				__u32 s_addr;

			} sin_addr;

			char pad[4];

		} addr_in;		/* IP-based bearer */

		__u16  sock_descr;	/* generic socket bearer */

#endif

	} dev_addr;

};





/* Link priority limits (range from 0 to # priorities - 1) */



#define TIPC_NUM_LINK_PRI 32



/* Link tolerance limits (min, default, max), in ms */



#define TIPC_MIN_LINK_TOL 50

#define TIPC_DEF_LINK_TOL 1500

#define TIPC_MAX_LINK_TOL 30000



/* Link window limits (min, default, max), in packets */



#define TIPC_MIN_LINK_WIN 16

#define TIPC_DEF_LINK_WIN 50

#define TIPC_MAX_LINK_WIN 150



/*

 * Configuration

 *

 * All configuration management messaging involves sending a request message

 * to the TIPC configuration service on a node, which sends a reply message

 * back.  (In the future multi-message replies may be supported.)

 *

 * Both request and reply messages consist of a transport header and payload.

 * The transport header contains info about the desired operation;

 * the payload consists of zero or more type/length/value (TLV) items

 * which specify parameters or results for the operation.

 *

 * For many operations, the request and reply messages have a fixed number

 * of TLVs (usually zero or one); however, some reply messages may return 

 * a variable number of TLVs.  A failed request is denoted by the presence

 * of an "error string" TLV in the reply message instead of the TLV(s) the

 * reply should contain if the request succeeds.

 */

 

#define TIPC_CFG_SRV	0		/* configuration service name type */



/* 

 * Public commands:

 * May be issued by any process.

 * Accepted by own node, or by remote node only if remote management enabled.                       

 */

 

#define  TIPC_CMD_NOOP   	    0x0000    /* tx none, rx none */

#define  TIPC_CMD_GET_NODES         0x0001    /* tx net_addr, rx node_info(s) */

#define  TIPC_CMD_GET_MEDIA_NAMES   0x0002    /* tx none, rx media_name(s) */

#define  TIPC_CMD_GET_BEARER_NAMES  0x0003    /* tx none, rx bearer_name(s) */

#define  TIPC_CMD_GET_LINKS         0x0004    /* tx net_addr, rx link_info(s) */

#define  TIPC_CMD_SHOW_NAME_TABLE   0x0005    /* tx name_tbl_query, rx ultra_string */

#define  TIPC_CMD_SHOW_PORTS        0x0006    /* tx none, rx ultra_string */

#define  TIPC_CMD_SHOW_LINK_STATS   0x000B    /* tx link_name, rx ultra_string */



#if 0

#define  TIPC_CMD_SHOW_PORT_STATS   0x0008    /* tx port_ref, rx ultra_string */

#define  TIPC_CMD_RESET_PORT_STATS  0x0009    /* tx port_ref, rx none */

#define  TIPC_CMD_GET_ROUTES        0x000A    /* tx ?, rx ? */

#define  TIPC_CMD_GET_LINK_PEER     0x000D    /* tx link_name, rx ? */

#endif



/* 

 * Protected commands:

 * May only be issued by "network administration capable" process.

 * Accepted by own node, or by remote node only if remote management enabled

 * and this node is zone manager.                       

 */



#define  TIPC_CMD_GET_REMOTE_MNG    0x4003    /* tx none, rx unsigned */

#define  TIPC_CMD_GET_MAX_PORTS     0x4004    /* tx none, rx unsigned */

#define  TIPC_CMD_GET_MAX_PUBL      0x4005    /* tx none, rx unsigned */

#define  TIPC_CMD_GET_MAX_SUBSCR    0x4006    /* tx none, rx unsigned */

#define  TIPC_CMD_GET_MAX_ZONES     0x4007    /* tx none, rx unsigned */

#define  TIPC_CMD_GET_MAX_CLUSTERS  0x4008    /* tx none, rx unsigned */

#define  TIPC_CMD_GET_MAX_NODES     0x4009    /* tx none, rx unsigned */

#define  TIPC_CMD_GET_MAX_SLAVES    0x400A    /* tx none, rx unsigned */

#define  TIPC_CMD_GET_NETID         0x400B    /* tx none, rx unsigned */



#define  TIPC_CMD_ENABLE_BEARER     0x4101    /* tx bearer_config, rx none */

#define  TIPC_CMD_DISABLE_BEARER    0x4102    /* tx bearer_name, rx none */

#define  TIPC_CMD_SET_LINK_TOL      0x4107    /* tx link_config, rx none */

#define  TIPC_CMD_SET_LINK_PRI      0x4108    /* tx link_config, rx none */

#define  TIPC_CMD_SET_LINK_WINDOW   0x4109    /* tx link_config, rx none */

#define  TIPC_CMD_SET_LOG_SIZE      0x410A    /* tx unsigned, rx none */

#define  TIPC_CMD_DUMP_LOG          0x410B    /* tx none, rx ultra_string */

#define  TIPC_CMD_RESET_LINK_STATS  0x410C    /* tx link_name, rx none */



#if 0

#define  TIPC_CMD_CREATE_LINK       0x4103    /* tx link_create, rx none */

#define  TIPC_CMD_REMOVE_LINK       0x4104    /* tx link_name, rx none */

#define  TIPC_CMD_BLOCK_LINK        0x4105    /* tx link_name, rx none */

#define  TIPC_CMD_UNBLOCK_LINK      0x4106    /* tx link_name, rx none */

#endif



/* 

 * Private commands:

 * May only be issued by "network administration capable" process.

 * Accepted by own node only; cannot be used on a remote node.                       

 */



#define  TIPC_CMD_SET_NODE_ADDR     0x8001    /* tx net_addr, rx none */

#if 0

#define  TIPC_CMD_SET_ZONE_MASTER   0x8002    /* tx none, rx none */

#endif

#define  TIPC_CMD_SET_REMOTE_MNG    0x8003    /* tx unsigned, rx none */

#define  TIPC_CMD_SET_MAX_PORTS     0x8004    /* tx unsigned, rx none */

#define  TIPC_CMD_SET_MAX_PUBL      0x8005    /* tx unsigned, rx none */

#define  TIPC_CMD_SET_MAX_SUBSCR    0x8006    /* tx unsigned, rx none */

#define  TIPC_CMD_SET_MAX_ZONES     0x8007    /* tx unsigned, rx none */

#define  TIPC_CMD_SET_MAX_CLUSTERS  0x8008    /* tx unsigned, rx none */

#define  TIPC_CMD_SET_MAX_NODES     0x8009    /* tx unsigned, rx none */

#define  TIPC_CMD_SET_MAX_SLAVES    0x800A    /* tx unsigned, rx none */

#define  TIPC_CMD_SET_NETID         0x800B    /* tx unsigned, rx none */



/*

 * TLV types defined for TIPC

 */



#define TIPC_TLV_NONE		0	/* no TLV present */

#define TIPC_TLV_VOID		1	/* empty TLV (0 data bytes)*/

#define TIPC_TLV_UNSIGNED	2	/* 32-bit integer */

#define TIPC_TLV_STRING		3	/* char[128] (max) */

#define TIPC_TLV_LARGE_STRING	4	/* char[2048] (max) */

#define TIPC_TLV_ULTRA_STRING	5	/* char[32768] (max) */



#define TIPC_TLV_ERROR_STRING	16	/* char[128] containing "error code" */

#define TIPC_TLV_NET_ADDR   	17	/* 32-bit integer denoting <Z.C.N> */

#define TIPC_TLV_MEDIA_NAME	18	/* char[MAX_MEDIA_NAME] */

#define TIPC_TLV_BEARER_NAME	19	/* char[MAX_BEARER_NAME] */

#define TIPC_TLV_LINK_NAME	20	/* char[MAX_LINK_NAME] */

#define TIPC_TLV_NODE_INFO	21	/* struct tipc_node_info */

#define TIPC_TLV_LINK_INFO	22	/* struct tipc_link_info */

#define TIPC_TLV_BEARER_CONFIG  23	/* struct tipc_bearer_config */

#define TIPC_TLV_LINK_CONFIG    24	/* struct tipc_link_config */

#define TIPC_TLV_NAME_TBL_QUERY	25	/* struct tipc_name_table_query */

#define TIPC_TLV_PORT_REF   	26	/* 32-bit port reference */



struct tipc_node_info {

	__u32 addr;			/* network address of node */

	__u32 up;			/* 0=down, 1= up */

};



struct tipc_link_info {

	__u32 dest;			/* network address of peer node */

	__u32 up;			/* 0=down, 1=up */

	char str[TIPC_MAX_LINK_NAME];	/* link name */

};



struct tipc_bearer_config {

	__u32 priority;			/* Range [1,31]. Override per link  */

	__u32 detect_scope;     

	char name[TIPC_MAX_BEARER_NAME];

};



struct tipc_link_config {

	__u32 value;

	char name[TIPC_MAX_LINK_NAME];

};



#define TIPC_NTQ_ALLTYPES 0x80000000



struct tipc_name_table_query {

	__u32 depth;	/* 1:type, 2:+name info, 3:+port info, 4+:+debug info */

	__u32 type;	/* {t,l,u} info ignored if high bit of "depth" is set */

	__u32 lowbound; /* (i.e. displays all entries of name table) */

	__u32 upbound;

};



/*

 * The error string TLV is a null-terminated string describing the cause 

 * of the request failure.  To simplify error processing (and to save space)

 * the first character of the string can be a special error code character

 * (lying by the range 0x80 to 0xFF) which represents a pre-defined reason.

 */



#define TIPC_CFG_TLV_ERROR      "\x80"  /* request contains incorrect TLV(s) */

#define TIPC_CFG_NOT_NET_ADMIN  "\x81"	/* must be network administrator */

#define TIPC_CFG_NOT_ZONE_MSTR	"\x82"	/* must be zone master */

#define TIPC_CFG_NO_REMOTE	"\x83"	/* remote management not enabled */

#define TIPC_CFG_NOT_SUPPORTED  "\x84"	/* request is not supported by TIPC */

#define TIPC_CFG_INVALID_VALUE  "\x85"  /* request has invalid argument value */



#if 0

/* prototypes TLV structures for proposed commands */

struct tipc_link_create {

	__u32   domain;

	struct tipc_media_addr peer_addr;

	char bearer_name[MAX_BEARER_NAME];

};



struct tipc_route_info {

	__u32 dest;

	__u32 router;

};

#endif



/*

 * A TLV consists of a descriptor, followed by the TLV value.

 * TLV descriptor fields are stored in network byte order; 

 * TLV values must also be stored in network byte order (where applicable).

 * TLV descriptors must be aligned to addresses which are multiple of 4,

 * so up to 3 bytes of padding may exist at the end of the TLV value area.

 * There must not be any padding between the TLV descriptor and its value.

 */



struct tlv_desc {

	__u16 tlv_len;		/* TLV length (descriptor + value) */

	__u16 tlv_type;		/* TLV identifier */

};



#define TLV_ALIGNTO 4



#define TLV_ALIGN(datalen) (((datalen)+(TLV_ALIGNTO-1)) & ~(TLV_ALIGNTO-1))

#define TLV_LENGTH(datalen) (sizeof(struct tlv_desc) + (datalen))

#define TLV_SPACE(datalen) (TLV_ALIGN(TLV_LENGTH(datalen)))

#define TLV_DATA(tlv) ((void *)((char *)(tlv) + TLV_LENGTH(0)))



static inline int TLV_OK(const void *tlv, __u16 space)

{

	/*

	 * Would also like to check that "tlv" is a multiple of 4,

	 * but don't know how to do this in a portable way.

	 * - Tried doing (!(tlv & (TLV_ALIGNTO-1))), but GCC compiler

	 *   won't allow binary "&" with a pointer.

	 * - Tried casting "tlv" to integer type, but causes warning about size

	 *   mismatch when pointer is bigger than chosen type (int, long, ...).

	 */



	return (space >= TLV_SPACE(0)) &&

		(ntohs(((struct tlv_desc *)tlv)->tlv_len) <= space);

}



static inline int TLV_CHECK(const void *tlv, __u16 space, __u16 exp_type)

{

	return TLV_OK(tlv, space) && 

		(ntohs(((struct tlv_desc *)tlv)->tlv_type) == exp_type);

}



static inline int TLV_SET(void *tlv, __u16 type, void *data, __u16 len)

{

	struct tlv_desc *tlv_ptr;

	int tlv_len;



	tlv_len = TLV_LENGTH(len);

	tlv_ptr = (struct tlv_desc *)tlv;

	tlv_ptr->tlv_type = htons(type);

	tlv_ptr->tlv_len  = htons(tlv_len);

	if (len && data)

		memcpy(TLV_DATA(tlv_ptr), data, tlv_len);

	return TLV_SPACE(len);

}



/*

 * A TLV list descriptor simplifies processing of messages 

 * containing multiple TLVs.

 */



struct tlv_list_desc {

	struct tlv_desc *tlv_ptr;	/* ptr to current TLV */

	__u32 tlv_space;		/* # bytes from curr TLV to list end */

};



static inline void TLV_LIST_INIT(struct tlv_list_desc *list, 

				 void *data, __u32 space)

{

	list->tlv_ptr = (struct tlv_desc *)data;

	list->tlv_space = space;

}

	     

static inline int TLV_LIST_EMPTY(struct tlv_list_desc *list)

{ 

	return (list->tlv_space == 0);

}



static inline int TLV_LIST_CHECK(struct tlv_list_desc *list, __u16 exp_type)

{

	return TLV_CHECK(list->tlv_ptr, list->tlv_space, exp_type);

}



static inline void *TLV_LIST_DATA(struct tlv_list_desc *list)

{

	return TLV_DATA(list->tlv_ptr);

}



static inline void TLV_LIST_STEP(struct tlv_list_desc *list)

{

	__u16 tlv_space = TLV_ALIGN(ntohs(list->tlv_ptr->tlv_len));



        list->tlv_ptr = (struct tlv_desc *)((char *)list->tlv_ptr + tlv_space);

	list->tlv_space -= tlv_space;

}



/*

 * Configuration messages exchanged via NETLINK_GENERIC use the following

 * family id, name, version and command.

 */

#define TIPC_GENL_FAMILY	0x222

#define TIPC_GENL_NAME		"TIPC"

#define TIPC_GENL_VERSION	0x1

#define TIPC_GENL_CMD		0x1



/*

 * TIPC specific header used in NETLINK_GENERIC requests.

 */

struct tipc_genlmsghdr {

	__u32 dest;		/* Destination address */

	__u16 cmd;		/* Command */

	__u16 reserved;		/* Unused */

};



#define TIPC_GENL_HDRLEN	NLMSG_ALIGN(sizeof(struct tipc_genlmsghdr))



/*

 * Configuration messages exchanged via TIPC sockets use the TIPC configuration 

 * message header, which is defined below.  This structure is analogous 

 * to the Netlink message header, but fields are stored in network byte order 

 * and no padding is permitted between the header and the message data 

 * that follows.

 */



struct tipc_cfg_msg_hdr

{

	__u32 tcm_len;		/* Message length (including header) */

	__u16 tcm_type;		/* Command type */

	__u16 tcm_flags;	/* Additional flags */

	char  tcm_reserved[8];	/* Unused */

};



#define TCM_F_REQUEST	0x1	/* Flag: Request message */

#define TCM_F_MORE	0x2	/* Flag: Message to be continued */



#define TCM_ALIGN(datalen)  (((datalen)+3) & ~3)

#define TCM_LENGTH(datalen) (sizeof(struct tipc_cfg_msg_hdr) + datalen)

#define TCM_SPACE(datalen)  (TCM_ALIGN(TCM_LENGTH(datalen)))

#define TCM_DATA(tcm_hdr)   ((void *)((char *)(tcm_hdr) + TCM_LENGTH(0)))



static inline int TCM_SET(void *msg, __u16 cmd, __u16 flags,

			  void *data, __u16 data_len)

{

	struct tipc_cfg_msg_hdr *tcm_hdr;

	int msg_len;



	msg_len = TCM_LENGTH(data_len);

	tcm_hdr = (struct tipc_cfg_msg_hdr *)msg;

	tcm_hdr->tcm_len   = htonl(msg_len);

	tcm_hdr->tcm_type  = htons(cmd);

	tcm_hdr->tcm_flags = htons(flags);

	if (data_len && data)

		memcpy(TCM_DATA(msg), data, data_len);

	return TCM_SPACE(data_len);

}



#endif