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authorPer Liden <per.liden@nospam.ericsson.com>2006-01-02 13:04:38 -0500
committerDavid S. Miller <davem@sunset.davemloft.net>2006-01-12 17:06:31 -0500
commitb97bf3fd8f6a16966d4f18983b2c40993ff937d4 (patch)
tree59959f8a0f3087455efdcb430846686f303c5991 /include/linux/tipc.h
parent58cba4650a7a414eabd2b40cc9d8e45fcdf192d9 (diff)
[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>
Diffstat (limited to 'include/linux/tipc.h')
-rw-r--r--include/linux/tipc.h598
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 @@
1/*
2 * include/linux/tipc.h: Include file for TIPC users
3 *
4 * Copyright (c) 2003-2005, Ericsson Research Canada
5 * Copyright (c) 2005, Wind River Systems
6 * Copyright (c) 2005-2006, Ericsson AB
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions are met:
11 *
12 * Redistributions of source code must retain the above copyright notice, this
13 * list of conditions and the following disclaimer.
14 * Redistributions in binary form must reproduce the above copyright notice,
15 * this list of conditions and the following disclaimer in the documentation
16 * and/or other materials provided with the distribution.
17 * Neither the names of the copyright holders nor the names of its
18 * contributors may be used to endorse or promote products derived from this
19 * software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 */
33
34#ifndef _LINUX_TIPC_H_
35#define _LINUX_TIPC_H_
36
37#include <linux/types.h>
38#include <linux/string.h>
39#include <asm/byteorder.h>
40
41/*
42 * TIPC addressing primitives
43 */
44
45struct tipc_portid {
46 __u32 ref;
47 __u32 node;
48};
49
50struct tipc_name {
51 __u32 type;
52 __u32 instance;
53};
54
55struct tipc_name_seq {
56 __u32 type;
57 __u32 lower;
58 __u32 upper;
59};
60
61static inline __u32 tipc_addr(unsigned int zone,
62 unsigned int cluster,
63 unsigned int node)
64{
65 return(zone << 24) | (cluster << 12) | node;
66}
67
68static inline unsigned int tipc_zone(__u32 addr)
69{
70 return addr >> 24;
71}
72
73static inline unsigned int tipc_cluster(__u32 addr)
74{
75 return(addr >> 12) & 0xfff;
76}
77
78static inline unsigned int tipc_node(__u32 addr)
79{
80 return addr & 0xfff;
81}
82
83/*
84 * Application-accessible port name types
85 */
86
87#define TIPC_NET_EVENTS 0 /* network event subscription name type */
88#define TIPC_TOP_SRV 1 /* topology service name type */
89#define TIPC_RESERVED_TYPES 64 /* lowest user-publishable name type */
90
91/*
92 * Publication scopes when binding port names and port name sequences
93 */
94
95#define TIPC_ZONE_SCOPE 1
96#define TIPC_CLUSTER_SCOPE 2
97#define TIPC_NODE_SCOPE 3
98
99/*
100 * Limiting values for messages
101 */
102
103#define TIPC_MAX_USER_MSG_SIZE 66000
104
105/*
106 * Message importance levels
107 */
108
109#define TIPC_LOW_IMPORTANCE 0 /* default */
110#define TIPC_MEDIUM_IMPORTANCE 1
111#define TIPC_HIGH_IMPORTANCE 2
112#define TIPC_CRITICAL_IMPORTANCE 3
113
114/*
115 * Msg rejection/connection shutdown reasons
116 */
117
118#define TIPC_OK 0
119#define TIPC_ERR_NO_NAME 1
120#define TIPC_ERR_NO_PORT 2
121#define TIPC_ERR_NO_NODE 3
122#define TIPC_ERR_OVERLOAD 4
123#define TIPC_CONN_SHUTDOWN 5
124
125/*
126 * TIPC topology subscription service definitions
127 */
128
129#define TIPC_SUB_PORTS 0x01 /* filter for port availability */
130#define TIPC_SUB_SERVICE 0x02 /* filter for service availability */
131#if 0
132/* The following filter options are not currently implemented */
133#define TIPC_SUB_NO_BIND_EVTS 0x04 /* filter out "publish" events */
134#define TIPC_SUB_NO_UNBIND_EVTS 0x08 /* filter out "withdraw" events */
135#define TIPC_SUB_SINGLE_EVT 0x10 /* expire after first event */
136#endif
137
138#define TIPC_WAIT_FOREVER ~0 /* timeout for permanent subscription */
139
140struct tipc_subscr {
141 struct tipc_name_seq seq; /* name sequence of interest */
142 __u32 timeout; /* subscription duration (in ms) */
143 __u32 filter; /* bitmask of filter options */
144 char usr_handle[8]; /* available for subscriber use */
145};
146
147
148#define TIPC_PUBLISHED 1 /* publication event */
149#define TIPC_WITHDRAWN 2 /* withdraw event */
150#define TIPC_SUBSCR_TIMEOUT 3 /* subscription timeout event */
151
152struct tipc_event {
153 __u32 event; /* event type */
154 __u32 found_lower; /* matching name seq instances */
155 __u32 found_upper; /* " " " " */
156 struct tipc_portid port; /* associated port */
157 struct tipc_subscr s; /* associated subscription */
158};
159
160/*
161 * Socket API
162 */
163
164#ifndef AF_TIPC
165#define AF_TIPC 30
166#endif
167
168#ifndef PF_TIPC
169#define PF_TIPC AF_TIPC
170#endif
171
172#ifndef SOL_TIPC
173#define SOL_TIPC 271
174#endif
175
176#define TIPC_ADDR_NAMESEQ 1
177#define TIPC_ADDR_MCAST 1
178#define TIPC_ADDR_NAME 2
179#define TIPC_ADDR_ID 3
180
181struct sockaddr_tipc {
182 unsigned short family;
183 unsigned char addrtype;
184 signed char scope;
185 union {
186 struct tipc_portid id;
187 struct tipc_name_seq nameseq;
188 struct {
189 struct tipc_name name;
190 __u32 domain; /* 0: own zone */
191 } name;
192 } addr;
193};
194
195/*
196 * Ancillary data objects supported by recvmsg()
197 */
198
199#define TIPC_ERRINFO 1 /* error info */
200#define TIPC_RETDATA 2 /* returned data */
201#define TIPC_DESTNAME 3 /* destination name */
202
203/*
204 * TIPC-specific socket option values
205 */
206
207#define TIPC_IMPORTANCE 127 /* Default: TIPC_LOW_IMPORTANCE */
208#define TIPC_SRC_DROPPABLE 128 /* Default: 0 (resend congested msg) */
209#define TIPC_DEST_DROPPABLE 129 /* Default: based on socket type */
210#define TIPC_CONN_TIMEOUT 130 /* Default: 8000 (ms) */
211
212/*
213 * Bearer
214 */
215
216/* Identifiers of supported TIPC media types */
217
218#define TIPC_MEDIA_TYPE_ETH 1
219
220/* Maximum sizes of TIPC bearer-related names (including terminating NUL) */
221
222#define TIPC_MAX_MEDIA_NAME 16 /* format = media */
223#define TIPC_MAX_IF_NAME 16 /* format = interface */
224#define TIPC_MAX_BEARER_NAME 32 /* format = media:interface */
225#define TIPC_MAX_LINK_NAME 60 /* format = Z.C.N:interface-Z.C.N:interface */
226
227struct tipc_media_addr {
228 __u32 type;
229 union {
230 __u8 eth_addr[6]; /* Ethernet bearer */
231#if 0
232 /* Prototypes for other possible bearer types */
233
234 struct {
235 __u16 sin_family;
236 __u16 sin_port;
237 struct {
238 __u32 s_addr;
239 } sin_addr;
240 char pad[4];
241 } addr_in; /* IP-based bearer */
242 __u16 sock_descr; /* generic socket bearer */
243#endif
244 } dev_addr;
245};
246
247
248/* Link priority limits (range from 0 to # priorities - 1) */
249
250#define TIPC_NUM_LINK_PRI 32
251
252/* Link tolerance limits (min, default, max), in ms */
253
254#define TIPC_MIN_LINK_TOL 50
255#define TIPC_DEF_LINK_TOL 1500
256#define TIPC_MAX_LINK_TOL 30000
257
258/* Link window limits (min, default, max), in packets */
259
260#define TIPC_MIN_LINK_WIN 16
261#define TIPC_DEF_LINK_WIN 50
262#define TIPC_MAX_LINK_WIN 150
263
264/*
265 * Configuration
266 *
267 * All configuration management messaging involves sending a request message
268 * to the TIPC configuration service on a node, which sends a reply message
269 * back. (In the future multi-message replies may be supported.)
270 *
271 * Both request and reply messages consist of a transport header and payload.
272 * The transport header contains info about the desired operation;
273 * the payload consists of zero or more type/length/value (TLV) items
274 * which specify parameters or results for the operation.
275 *
276 * For many operations, the request and reply messages have a fixed number
277 * of TLVs (usually zero or one); however, some reply messages may return
278 * a variable number of TLVs. A failed request is denoted by the presence
279 * of an "error string" TLV in the reply message instead of the TLV(s) the
280 * reply should contain if the request succeeds.
281 */
282
283#define TIPC_CFG_SRV 0 /* configuration service name type */
284
285/*
286 * Public commands:
287 * May be issued by any process.
288 * Accepted by own node, or by remote node only if remote management enabled.
289 */
290
291#define TIPC_CMD_NOOP 0x0000 /* tx none, rx none */
292#define TIPC_CMD_GET_NODES 0x0001 /* tx net_addr, rx node_info(s) */
293#define TIPC_CMD_GET_MEDIA_NAMES 0x0002 /* tx none, rx media_name(s) */
294#define TIPC_CMD_GET_BEARER_NAMES 0x0003 /* tx none, rx bearer_name(s) */
295#define TIPC_CMD_GET_LINKS 0x0004 /* tx net_addr, rx link_info(s) */
296#define TIPC_CMD_SHOW_NAME_TABLE 0x0005 /* tx name_tbl_query, rx ultra_string */
297#define TIPC_CMD_SHOW_PORTS 0x0006 /* tx none, rx ultra_string */
298#define TIPC_CMD_SHOW_LINK_STATS 0x000B /* tx link_name, rx ultra_string */
299
300#if 0
301#define TIPC_CMD_SHOW_PORT_STATS 0x0008 /* tx port_ref, rx ultra_string */
302#define TIPC_CMD_RESET_PORT_STATS 0x0009 /* tx port_ref, rx none */
303#define TIPC_CMD_GET_ROUTES 0x000A /* tx ?, rx ? */
304#define TIPC_CMD_GET_LINK_PEER 0x000D /* tx link_name, rx ? */
305#endif
306
307/*
308 * Protected commands:
309 * May only be issued by "network administration capable" process.
310 * Accepted by own node, or by remote node only if remote management enabled
311 * and this node is zone manager.
312 */
313
314#define TIPC_CMD_GET_REMOTE_MNG 0x4003 /* tx none, rx unsigned */
315#define TIPC_CMD_GET_MAX_PORTS 0x4004 /* tx none, rx unsigned */
316#define TIPC_CMD_GET_MAX_PUBL 0x4005 /* tx none, rx unsigned */
317#define TIPC_CMD_GET_MAX_SUBSCR 0x4006 /* tx none, rx unsigned */
318#define TIPC_CMD_GET_MAX_ZONES 0x4007 /* tx none, rx unsigned */
319#define TIPC_CMD_GET_MAX_CLUSTERS 0x4008 /* tx none, rx unsigned */
320#define TIPC_CMD_GET_MAX_NODES 0x4009 /* tx none, rx unsigned */
321#define TIPC_CMD_GET_MAX_SLAVES 0x400A /* tx none, rx unsigned */
322#define TIPC_CMD_GET_NETID 0x400B /* tx none, rx unsigned */
323
324#define TIPC_CMD_ENABLE_BEARER 0x4101 /* tx bearer_config, rx none */
325#define TIPC_CMD_DISABLE_BEARER 0x4102 /* tx bearer_name, rx none */
326#define TIPC_CMD_SET_LINK_TOL 0x4107 /* tx link_config, rx none */
327#define TIPC_CMD_SET_LINK_PRI 0x4108 /* tx link_config, rx none */
328#define TIPC_CMD_SET_LINK_WINDOW 0x4109 /* tx link_config, rx none */
329#define TIPC_CMD_SET_LOG_SIZE 0x410A /* tx unsigned, rx none */
330#define TIPC_CMD_DUMP_LOG 0x410B /* tx none, rx ultra_string */
331#define TIPC_CMD_RESET_LINK_STATS 0x410C /* tx link_name, rx none */
332
333#if 0
334#define TIPC_CMD_CREATE_LINK 0x4103 /* tx link_create, rx none */
335#define TIPC_CMD_REMOVE_LINK 0x4104 /* tx link_name, rx none */
336#define TIPC_CMD_BLOCK_LINK 0x4105 /* tx link_name, rx none */
337#define TIPC_CMD_UNBLOCK_LINK 0x4106 /* tx link_name, rx none */
338#endif
339
340/*
341 * Private commands:
342 * May only be issued by "network administration capable" process.
343 * Accepted by own node only; cannot be used on a remote node.
344 */
345
346#define TIPC_CMD_SET_NODE_ADDR 0x8001 /* tx net_addr, rx none */
347#if 0
348#define TIPC_CMD_SET_ZONE_MASTER 0x8002 /* tx none, rx none */
349#endif
350#define TIPC_CMD_SET_REMOTE_MNG 0x8003 /* tx unsigned, rx none */
351#define TIPC_CMD_SET_MAX_PORTS 0x8004 /* tx unsigned, rx none */
352#define TIPC_CMD_SET_MAX_PUBL 0x8005 /* tx unsigned, rx none */
353#define TIPC_CMD_SET_MAX_SUBSCR 0x8006 /* tx unsigned, rx none */
354#define TIPC_CMD_SET_MAX_ZONES 0x8007 /* tx unsigned, rx none */
355#define TIPC_CMD_SET_MAX_CLUSTERS 0x8008 /* tx unsigned, rx none */
356#define TIPC_CMD_SET_MAX_NODES 0x8009 /* tx unsigned, rx none */
357#define TIPC_CMD_SET_MAX_SLAVES 0x800A /* tx unsigned, rx none */
358#define TIPC_CMD_SET_NETID 0x800B /* tx unsigned, rx none */
359
360/*
361 * TLV types defined for TIPC
362 */
363
364#define TIPC_TLV_NONE 0 /* no TLV present */
365#define TIPC_TLV_VOID 1 /* empty TLV (0 data bytes)*/
366#define TIPC_TLV_UNSIGNED 2 /* 32-bit integer */
367#define TIPC_TLV_STRING 3 /* char[128] (max) */
368#define TIPC_TLV_LARGE_STRING 4 /* char[2048] (max) */
369#define TIPC_TLV_ULTRA_STRING 5 /* char[32768] (max) */
370
371#define TIPC_TLV_ERROR_STRING 16 /* char[128] containing "error code" */
372#define TIPC_TLV_NET_ADDR 17 /* 32-bit integer denoting <Z.C.N> */
373#define TIPC_TLV_MEDIA_NAME 18 /* char[MAX_MEDIA_NAME] */
374#define TIPC_TLV_BEARER_NAME 19 /* char[MAX_BEARER_NAME] */
375#define TIPC_TLV_LINK_NAME 20 /* char[MAX_LINK_NAME] */
376#define TIPC_TLV_NODE_INFO 21 /* struct tipc_node_info */
377#define TIPC_TLV_LINK_INFO 22 /* struct tipc_link_info */
378#define TIPC_TLV_BEARER_CONFIG 23 /* struct tipc_bearer_config */
379#define TIPC_TLV_LINK_CONFIG 24 /* struct tipc_link_config */
380#define TIPC_TLV_NAME_TBL_QUERY 25 /* struct tipc_name_table_query */
381#define TIPC_TLV_PORT_REF 26 /* 32-bit port reference */
382
383struct tipc_node_info {
384 __u32 addr; /* network address of node */
385 __u32 up; /* 0=down, 1= up */
386};
387
388struct tipc_link_info {
389 __u32 dest; /* network address of peer node */
390 __u32 up; /* 0=down, 1=up */
391 char str[TIPC_MAX_LINK_NAME]; /* link name */
392};
393
394struct tipc_bearer_config {
395 __u32 priority; /* Range [1,31]. Override per link */
396 __u32 detect_scope;
397 char name[TIPC_MAX_BEARER_NAME];
398};
399
400struct tipc_link_config {
401 __u32 value;
402 char name[TIPC_MAX_LINK_NAME];
403};
404
405#define TIPC_NTQ_ALLTYPES 0x80000000
406
407struct tipc_name_table_query {
408 __u32 depth; /* 1:type, 2:+name info, 3:+port info, 4+:+debug info */
409 __u32 type; /* {t,l,u} info ignored if high bit of "depth" is set */
410 __u32 lowbound; /* (i.e. displays all entries of name table) */
411 __u32 upbound;
412};
413
414/*
415 * The error string TLV is a null-terminated string describing the cause
416 * of the request failure. To simplify error processing (and to save space)
417 * the first character of the string can be a special error code character
418 * (lying by the range 0x80 to 0xFF) which represents a pre-defined reason.
419 */
420
421#define TIPC_CFG_TLV_ERROR "\x80" /* request contains incorrect TLV(s) */
422#define TIPC_CFG_NOT_NET_ADMIN "\x81" /* must be network administrator */
423#define TIPC_CFG_NOT_ZONE_MSTR "\x82" /* must be zone master */
424#define TIPC_CFG_NO_REMOTE "\x83" /* remote management not enabled */
425#define TIPC_CFG_NOT_SUPPORTED "\x84" /* request is not supported by TIPC */
426#define TIPC_CFG_INVALID_VALUE "\x85" /* request has invalid argument value */
427
428#if 0
429/* prototypes TLV structures for proposed commands */
430struct tipc_link_create {
431 __u32 domain;
432 struct tipc_media_addr peer_addr;
433 char bearer_name[MAX_BEARER_NAME];
434};
435
436struct tipc_route_info {
437 __u32 dest;
438 __u32 router;
439};
440#endif
441
442/*
443 * A TLV consists of a descriptor, followed by the TLV value.
444 * TLV descriptor fields are stored in network byte order;
445 * TLV values must also be stored in network byte order (where applicable).
446 * TLV descriptors must be aligned to addresses which are multiple of 4,
447 * so up to 3 bytes of padding may exist at the end of the TLV value area.
448 * There must not be any padding between the TLV descriptor and its value.
449 */
450
451struct tlv_desc {
452 __u16 tlv_len; /* TLV length (descriptor + value) */
453 __u16 tlv_type; /* TLV identifier */
454};
455
456#define TLV_ALIGNTO 4
457
458#define TLV_ALIGN(datalen) (((datalen)+(TLV_ALIGNTO-1)) & ~(TLV_ALIGNTO-1))
459#define TLV_LENGTH(datalen) (sizeof(struct tlv_desc) + (datalen))
460#define TLV_SPACE(datalen) (TLV_ALIGN(TLV_LENGTH(datalen)))
461#define TLV_DATA(tlv) ((void *)((char *)(tlv) + TLV_LENGTH(0)))
462
463static inline int TLV_OK(const void *tlv, __u16 space)
464{
465 /*
466 * Would also like to check that "tlv" is a multiple of 4,
467 * but don't know how to do this in a portable way.
468 * - Tried doing (!(tlv & (TLV_ALIGNTO-1))), but GCC compiler
469 * won't allow binary "&" with a pointer.
470 * - Tried casting "tlv" to integer type, but causes warning about size
471 * mismatch when pointer is bigger than chosen type (int, long, ...).
472 */
473
474 return (space >= TLV_SPACE(0)) &&
475 (ntohs(((struct tlv_desc *)tlv)->tlv_len) <= space);
476}
477
478static inline int TLV_CHECK(const void *tlv, __u16 space, __u16 exp_type)
479{
480 return TLV_OK(tlv, space) &&
481 (ntohs(((struct tlv_desc *)tlv)->tlv_type) == exp_type);
482}
483
484static inline int TLV_SET(void *tlv, __u16 type, void *data, __u16 len)
485{
486 struct tlv_desc *tlv_ptr;
487 int tlv_len;
488
489 tlv_len = TLV_LENGTH(len);
490 tlv_ptr = (struct tlv_desc *)tlv;
491 tlv_ptr->tlv_type = htons(type);
492 tlv_ptr->tlv_len = htons(tlv_len);
493 if (len && data)
494 memcpy(TLV_DATA(tlv_ptr), data, tlv_len);
495 return TLV_SPACE(len);
496}
497
498/*
499 * A TLV list descriptor simplifies processing of messages
500 * containing multiple TLVs.
501 */
502
503struct tlv_list_desc {
504 struct tlv_desc *tlv_ptr; /* ptr to current TLV */
505 __u32 tlv_space; /* # bytes from curr TLV to list end */
506};
507
508static inline void TLV_LIST_INIT(struct tlv_list_desc *list,
509 void *data, __u32 space)
510{
511 list->tlv_ptr = (struct tlv_desc *)data;
512 list->tlv_space = space;
513}
514
515static inline int TLV_LIST_EMPTY(struct tlv_list_desc *list)
516{
517 return (list->tlv_space == 0);
518}
519
520static inline int TLV_LIST_CHECK(struct tlv_list_desc *list, __u16 exp_type)
521{
522 return TLV_CHECK(list->tlv_ptr, list->tlv_space, exp_type);
523}
524
525static inline void *TLV_LIST_DATA(struct tlv_list_desc *list)
526{
527 return TLV_DATA(list->tlv_ptr);
528}
529
530static inline void TLV_LIST_STEP(struct tlv_list_desc *list)
531{
532 __u16 tlv_space = TLV_ALIGN(ntohs(list->tlv_ptr->tlv_len));
533
534 list->tlv_ptr = (struct tlv_desc *)((char *)list->tlv_ptr + tlv_space);
535 list->tlv_space -= tlv_space;
536}
537
538/*
539 * Configuration messages exchanged via NETLINK_GENERIC use the following
540 * family id, name, version and command.
541 */
542#define TIPC_GENL_FAMILY 0x222
543#define TIPC_GENL_NAME "TIPC"
544#define TIPC_GENL_VERSION 0x1
545#define TIPC_GENL_CMD 0x1
546
547/*
548 * TIPC specific header used in NETLINK_GENERIC requests.
549 */
550struct tipc_genlmsghdr {
551 __u32 dest; /* Destination address */
552 __u16 cmd; /* Command */
553 __u16 reserved; /* Unused */
554};
555
556#define TIPC_GENL_HDRLEN NLMSG_ALIGN(sizeof(struct tipc_genlmsghdr))
557
558/*
559 * Configuration messages exchanged via TIPC sockets use the TIPC configuration
560 * message header, which is defined below. This structure is analogous
561 * to the Netlink message header, but fields are stored in network byte order
562 * and no padding is permitted between the header and the message data
563 * that follows.
564 */
565
566struct tipc_cfg_msg_hdr
567{
568 __u32 tcm_len; /* Message length (including header) */
569 __u16 tcm_type; /* Command type */
570 __u16 tcm_flags; /* Additional flags */
571 char tcm_reserved[8]; /* Unused */
572};
573
574#define TCM_F_REQUEST 0x1 /* Flag: Request message */
575#define TCM_F_MORE 0x2 /* Flag: Message to be continued */
576
577#define TCM_ALIGN(datalen) (((datalen)+3) & ~3)
578#define TCM_LENGTH(datalen) (sizeof(struct tipc_cfg_msg_hdr) + datalen)
579#define TCM_SPACE(datalen) (TCM_ALIGN(TCM_LENGTH(datalen)))
580#define TCM_DATA(tcm_hdr) ((void *)((char *)(tcm_hdr) + TCM_LENGTH(0)))
581
582static inline int TCM_SET(void *msg, __u16 cmd, __u16 flags,
583 void *data, __u16 data_len)
584{
585 struct tipc_cfg_msg_hdr *tcm_hdr;
586 int msg_len;
587
588 msg_len = TCM_LENGTH(data_len);
589 tcm_hdr = (struct tipc_cfg_msg_hdr *)msg;
590 tcm_hdr->tcm_len = htonl(msg_len);
591 tcm_hdr->tcm_type = htons(cmd);
592 tcm_hdr->tcm_flags = htons(flags);
593 if (data_len && data)
594 memcpy(TCM_DATA(msg), data, data_len);
595 return TCM_SPACE(data_len);
596}
597
598#endif