[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: Per Liden <per.liden@nospam.ericsson.com>

1 files changed, 598 insertions, 0 deletions

diff --git a/include/linux/tipc.h b/include/linux/tipc.h
new file mode 100644
index 000000000000..ca754f3317f2
--- /dev/null
+++ b/include/linux/tipc.h
@@ -0,0 +1,598 @@
+/*
+ * 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