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Linux/include/linux/tipc_config.h

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  1 /*
  2  * include/linux/tipc_config.h: Include file for TIPC configuration interface
  3  * 
  4  * Copyright (c) 2003-2006, Ericsson AB
  5  * Copyright (c) 2005-2007, Wind River Systems
  6  * All rights reserved.
  7  *
  8  * Redistribution and use in source and binary forms, with or without
  9  * modification, are permitted provided that the following conditions are met:
 10  *
 11  * 1. Redistributions of source code must retain the above copyright
 12  *    notice, this list of conditions and the following disclaimer.
 13  * 2. Redistributions in binary form must reproduce the above copyright
 14  *    notice, this list of conditions and the following disclaimer in the
 15  *    documentation and/or other materials provided with the distribution.
 16  * 3. Neither the names of the copyright holders nor the names of its
 17  *    contributors may be used to endorse or promote products derived from
 18  *    this software without specific prior written permission.
 19  *
 20  * Alternatively, this software may be distributed under the terms of the
 21  * GNU General Public License ("GPL") version 2 as published by the Free
 22  * Software Foundation.
 23  *
 24  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 25  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 27  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 28  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 29  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 30  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 31  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 32  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 33  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 34  * POSSIBILITY OF SUCH DAMAGE.
 35  */
 36 
 37 #ifndef _LINUX_TIPC_CONFIG_H_
 38 #define _LINUX_TIPC_CONFIG_H_
 39 
 40 #include <linux/types.h>
 41 #include <linux/string.h>
 42 #include <asm/byteorder.h>
 43 
 44 /*
 45  * Configuration
 46  *
 47  * All configuration management messaging involves sending a request message
 48  * to the TIPC configuration service on a node, which sends a reply message
 49  * back.  (In the future multi-message replies may be supported.)
 50  *
 51  * Both request and reply messages consist of a transport header and payload.
 52  * The transport header contains info about the desired operation;
 53  * the payload consists of zero or more type/length/value (TLV) items
 54  * which specify parameters or results for the operation.
 55  *
 56  * For many operations, the request and reply messages have a fixed number
 57  * of TLVs (usually zero or one); however, some reply messages may return 
 58  * a variable number of TLVs.  A failed request is denoted by the presence
 59  * of an "error string" TLV in the reply message instead of the TLV(s) the
 60  * reply should contain if the request succeeds.
 61  */
 62  
 63 /* 
 64  * Public commands:
 65  * May be issued by any process.
 66  * Accepted by own node, or by remote node only if remote management enabled.                       
 67  */
 68  
 69 #define  TIPC_CMD_NOOP              0x0000    /* tx none, rx none */
 70 #define  TIPC_CMD_GET_NODES         0x0001    /* tx net_addr, rx node_info(s) */
 71 #define  TIPC_CMD_GET_MEDIA_NAMES   0x0002    /* tx none, rx media_name(s) */
 72 #define  TIPC_CMD_GET_BEARER_NAMES  0x0003    /* tx none, rx bearer_name(s) */
 73 #define  TIPC_CMD_GET_LINKS         0x0004    /* tx net_addr, rx link_info(s) */
 74 #define  TIPC_CMD_SHOW_NAME_TABLE   0x0005    /* tx name_tbl_query, rx ultra_string */
 75 #define  TIPC_CMD_SHOW_PORTS        0x0006    /* tx none, rx ultra_string */
 76 #define  TIPC_CMD_SHOW_LINK_STATS   0x000B    /* tx link_name, rx ultra_string */
 77 
 78 #if 0
 79 #define  TIPC_CMD_SHOW_PORT_STATS   0x0008    /* tx port_ref, rx ultra_string */
 80 #define  TIPC_CMD_RESET_PORT_STATS  0x0009    /* tx port_ref, rx none */
 81 #define  TIPC_CMD_GET_ROUTES        0x000A    /* tx ?, rx ? */
 82 #define  TIPC_CMD_GET_LINK_PEER     0x000D    /* tx link_name, rx ? */
 83 #endif
 84 
 85 /* 
 86  * Protected commands:
 87  * May only be issued by "network administration capable" process.
 88  * Accepted by own node, or by remote node only if remote management enabled
 89  * and this node is zone manager.                       
 90  */
 91 
 92 #define  TIPC_CMD_GET_REMOTE_MNG    0x4003    /* tx none, rx unsigned */
 93 #define  TIPC_CMD_GET_MAX_PORTS     0x4004    /* tx none, rx unsigned */
 94 #define  TIPC_CMD_GET_MAX_PUBL      0x4005    /* tx none, rx unsigned */
 95 #define  TIPC_CMD_GET_MAX_SUBSCR    0x4006    /* tx none, rx unsigned */
 96 #define  TIPC_CMD_GET_MAX_ZONES     0x4007    /* tx none, rx unsigned */
 97 #define  TIPC_CMD_GET_MAX_CLUSTERS  0x4008    /* tx none, rx unsigned */
 98 #define  TIPC_CMD_GET_MAX_NODES     0x4009    /* tx none, rx unsigned */
 99 #define  TIPC_CMD_GET_MAX_SLAVES    0x400A    /* tx none, rx unsigned */
100 #define  TIPC_CMD_GET_NETID         0x400B    /* tx none, rx unsigned */
101 
102 #define  TIPC_CMD_ENABLE_BEARER     0x4101    /* tx bearer_config, rx none */
103 #define  TIPC_CMD_DISABLE_BEARER    0x4102    /* tx bearer_name, rx none */
104 #define  TIPC_CMD_SET_LINK_TOL      0x4107    /* tx link_config, rx none */
105 #define  TIPC_CMD_SET_LINK_PRI      0x4108    /* tx link_config, rx none */
106 #define  TIPC_CMD_SET_LINK_WINDOW   0x4109    /* tx link_config, rx none */
107 #define  TIPC_CMD_SET_LOG_SIZE      0x410A    /* tx unsigned, rx none */
108 #define  TIPC_CMD_DUMP_LOG          0x410B    /* tx none, rx ultra_string */
109 #define  TIPC_CMD_RESET_LINK_STATS  0x410C    /* tx link_name, rx none */
110 
111 #if 0
112 #define  TIPC_CMD_CREATE_LINK       0x4103    /* tx link_create, rx none */
113 #define  TIPC_CMD_REMOVE_LINK       0x4104    /* tx link_name, rx none */
114 #define  TIPC_CMD_BLOCK_LINK        0x4105    /* tx link_name, rx none */
115 #define  TIPC_CMD_UNBLOCK_LINK      0x4106    /* tx link_name, rx none */
116 #endif
117 
118 /* 
119  * Private commands:
120  * May only be issued by "network administration capable" process.
121  * Accepted by own node only; cannot be used on a remote node.                       
122  */
123 
124 #define  TIPC_CMD_SET_NODE_ADDR     0x8001    /* tx net_addr, rx none */
125 #if 0
126 #define  TIPC_CMD_SET_ZONE_MASTER   0x8002    /* tx none, rx none */
127 #endif
128 #define  TIPC_CMD_SET_REMOTE_MNG    0x8003    /* tx unsigned, rx none */
129 #define  TIPC_CMD_SET_MAX_PORTS     0x8004    /* tx unsigned, rx none */
130 #define  TIPC_CMD_SET_MAX_PUBL      0x8005    /* tx unsigned, rx none */
131 #define  TIPC_CMD_SET_MAX_SUBSCR    0x8006    /* tx unsigned, rx none */
132 #define  TIPC_CMD_SET_MAX_ZONES     0x8007    /* tx unsigned, rx none */
133 #define  TIPC_CMD_SET_MAX_CLUSTERS  0x8008    /* tx unsigned, rx none */
134 #define  TIPC_CMD_SET_MAX_NODES     0x8009    /* tx unsigned, rx none */
135 #define  TIPC_CMD_SET_MAX_SLAVES    0x800A    /* tx unsigned, rx none */
136 #define  TIPC_CMD_SET_NETID         0x800B    /* tx unsigned, rx none */
137 
138 /*
139  * Reserved commands:
140  * May not be issued by any process.
141  * Used internally by TIPC.
142  */
143 
144 #define  TIPC_CMD_NOT_NET_ADMIN     0xC001    /* tx none, rx none */
145 
146 /*
147  * TLV types defined for TIPC
148  */
149 
150 #define TIPC_TLV_NONE           0       /* no TLV present */
151 #define TIPC_TLV_VOID           1       /* empty TLV (0 data bytes)*/
152 #define TIPC_TLV_UNSIGNED       2       /* 32-bit integer */
153 #define TIPC_TLV_STRING         3       /* char[128] (max) */
154 #define TIPC_TLV_LARGE_STRING   4       /* char[2048] (max) */
155 #define TIPC_TLV_ULTRA_STRING   5       /* char[32768] (max) */
156 
157 #define TIPC_TLV_ERROR_STRING   16      /* char[128] containing "error code" */
158 #define TIPC_TLV_NET_ADDR       17      /* 32-bit integer denoting <Z.C.N> */
159 #define TIPC_TLV_MEDIA_NAME     18      /* char[TIPC_MAX_MEDIA_NAME] */
160 #define TIPC_TLV_BEARER_NAME    19      /* char[TIPC_MAX_BEARER_NAME] */
161 #define TIPC_TLV_LINK_NAME      20      /* char[TIPC_MAX_LINK_NAME] */
162 #define TIPC_TLV_NODE_INFO      21      /* struct tipc_node_info */
163 #define TIPC_TLV_LINK_INFO      22      /* struct tipc_link_info */
164 #define TIPC_TLV_BEARER_CONFIG  23      /* struct tipc_bearer_config */
165 #define TIPC_TLV_LINK_CONFIG    24      /* struct tipc_link_config */
166 #define TIPC_TLV_NAME_TBL_QUERY 25      /* struct tipc_name_table_query */
167 #define TIPC_TLV_PORT_REF       26      /* 32-bit port reference */
168 
169 /*
170  * Maximum sizes of TIPC bearer-related names (including terminating NUL)
171  */ 
172 
173 #define TIPC_MAX_MEDIA_NAME     16      /* format = media */
174 #define TIPC_MAX_IF_NAME        16      /* format = interface */
175 #define TIPC_MAX_BEARER_NAME    32      /* format = media:interface */
176 #define TIPC_MAX_LINK_NAME      60      /* format = Z.C.N:interface-Z.C.N:interface */
177 
178 /*
179  * Link priority limits (min, default, max, media default)
180  */
181 
182 #define TIPC_MIN_LINK_PRI       0
183 #define TIPC_DEF_LINK_PRI       10
184 #define TIPC_MAX_LINK_PRI       31
185 #define TIPC_MEDIA_LINK_PRI     (TIPC_MAX_LINK_PRI + 1)
186 
187 /*
188  * Link tolerance limits (min, default, max), in ms
189  */
190 
191 #define TIPC_MIN_LINK_TOL 50
192 #define TIPC_DEF_LINK_TOL 1500
193 #define TIPC_MAX_LINK_TOL 30000
194 
195 /*
196  * Link window limits (min, default, max), in packets
197  */
198 
199 #define TIPC_MIN_LINK_WIN 16
200 #define TIPC_DEF_LINK_WIN 50
201 #define TIPC_MAX_LINK_WIN 150
202 
203 
204 struct tipc_node_info {
205         __be32 addr;                    /* network address of node */
206         __be32 up;                      /* 0=down, 1= up */
207 };
208 
209 struct tipc_link_info {
210         __be32 dest;                    /* network address of peer node */
211         __be32 up;                      /* 0=down, 1=up */
212         char str[TIPC_MAX_LINK_NAME];   /* link name */
213 };
214 
215 struct tipc_bearer_config {
216         __be32 priority;                /* Range [1,31]. Override per link  */
217         __be32 detect_scope;
218         char name[TIPC_MAX_BEARER_NAME];
219 };
220 
221 struct tipc_link_config {
222         __be32 value;
223         char name[TIPC_MAX_LINK_NAME];
224 };
225 
226 #define TIPC_NTQ_ALLTYPES 0x80000000
227 
228 struct tipc_name_table_query {
229         __be32 depth;   /* 1:type, 2:+name info, 3:+port info, 4+:+debug info */
230         __be32 type;    /* {t,l,u} info ignored if high bit of "depth" is set */
231         __be32 lowbound; /* (i.e. displays all entries of name table) */
232         __be32 upbound;
233 };
234 
235 /*
236  * The error string TLV is a null-terminated string describing the cause 
237  * of the request failure.  To simplify error processing (and to save space)
238  * the first character of the string can be a special error code character
239  * (lying by the range 0x80 to 0xFF) which represents a pre-defined reason.
240  */
241 
242 #define TIPC_CFG_TLV_ERROR      "\x80"  /* request contains incorrect TLV(s) */
243 #define TIPC_CFG_NOT_NET_ADMIN  "\x81"  /* must be network administrator */
244 #define TIPC_CFG_NOT_ZONE_MSTR  "\x82"  /* must be zone master */
245 #define TIPC_CFG_NO_REMOTE      "\x83"  /* remote management not enabled */
246 #define TIPC_CFG_NOT_SUPPORTED  "\x84"  /* request is not supported by TIPC */
247 #define TIPC_CFG_INVALID_VALUE  "\x85"  /* request has invalid argument value */
248 
249 #if 0
250 /* prototypes TLV structures for proposed commands */
251 struct tipc_link_create {
252         __u32   domain;
253         struct tipc_media_addr peer_addr;
254         char bearer_name[TIPC_MAX_BEARER_NAME];
255 };
256 
257 struct tipc_route_info {
258         __u32 dest;
259         __u32 router;
260 };
261 #endif
262 
263 /*
264  * A TLV consists of a descriptor, followed by the TLV value.
265  * TLV descriptor fields are stored in network byte order; 
266  * TLV values must also be stored in network byte order (where applicable).
267  * TLV descriptors must be aligned to addresses which are multiple of 4,
268  * so up to 3 bytes of padding may exist at the end of the TLV value area.
269  * There must not be any padding between the TLV descriptor and its value.
270  */
271 
272 struct tlv_desc {
273         __be16 tlv_len;         /* TLV length (descriptor + value) */
274         __be16 tlv_type;                /* TLV identifier */
275 };
276 
277 #define TLV_ALIGNTO 4
278 
279 #define TLV_ALIGN(datalen) (((datalen)+(TLV_ALIGNTO-1)) & ~(TLV_ALIGNTO-1))
280 #define TLV_LENGTH(datalen) (sizeof(struct tlv_desc) + (datalen))
281 #define TLV_SPACE(datalen) (TLV_ALIGN(TLV_LENGTH(datalen)))
282 #define TLV_DATA(tlv) ((void *)((char *)(tlv) + TLV_LENGTH(0)))
283 
284 static inline int TLV_OK(const void *tlv, __u16 space)
285 {
286         /*
287          * Would also like to check that "tlv" is a multiple of 4,
288          * but don't know how to do this in a portable way.
289          * - Tried doing (!(tlv & (TLV_ALIGNTO-1))), but GCC compiler
290          *   won't allow binary "&" with a pointer.
291          * - Tried casting "tlv" to integer type, but causes warning about size
292          *   mismatch when pointer is bigger than chosen type (int, long, ...).
293          */
294 
295         return (space >= TLV_SPACE(0)) &&
296                 (ntohs(((struct tlv_desc *)tlv)->tlv_len) <= space);
297 }
298 
299 static inline int TLV_CHECK(const void *tlv, __u16 space, __u16 exp_type)
300 {
301         return TLV_OK(tlv, space) && 
302                 (ntohs(((struct tlv_desc *)tlv)->tlv_type) == exp_type);
303 }
304 
305 static inline int TLV_SET(void *tlv, __u16 type, void *data, __u16 len)
306 {
307         struct tlv_desc *tlv_ptr;
308         int tlv_len;
309 
310         tlv_len = TLV_LENGTH(len);
311         tlv_ptr = (struct tlv_desc *)tlv;
312         tlv_ptr->tlv_type = htons(type);
313         tlv_ptr->tlv_len  = htons(tlv_len);
314         if (len && data)
315                 memcpy(TLV_DATA(tlv_ptr), data, tlv_len);
316         return TLV_SPACE(len);
317 }
318 
319 /*
320  * A TLV list descriptor simplifies processing of messages 
321  * containing multiple TLVs.
322  */
323 
324 struct tlv_list_desc {
325         struct tlv_desc *tlv_ptr;       /* ptr to current TLV */
326         __u32 tlv_space;                /* # bytes from curr TLV to list end */
327 };
328 
329 static inline void TLV_LIST_INIT(struct tlv_list_desc *list, 
330                                  void *data, __u32 space)
331 {
332         list->tlv_ptr = (struct tlv_desc *)data;
333         list->tlv_space = space;
334 }
335              
336 static inline int TLV_LIST_EMPTY(struct tlv_list_desc *list)
337 { 
338         return (list->tlv_space == 0);
339 }
340 
341 static inline int TLV_LIST_CHECK(struct tlv_list_desc *list, __u16 exp_type)
342 {
343         return TLV_CHECK(list->tlv_ptr, list->tlv_space, exp_type);
344 }
345 
346 static inline void *TLV_LIST_DATA(struct tlv_list_desc *list)
347 {
348         return TLV_DATA(list->tlv_ptr);
349 }
350 
351 static inline void TLV_LIST_STEP(struct tlv_list_desc *list)
352 {
353         __u16 tlv_space = TLV_ALIGN(ntohs(list->tlv_ptr->tlv_len));
354 
355         list->tlv_ptr = (struct tlv_desc *)((char *)list->tlv_ptr + tlv_space);
356         list->tlv_space -= tlv_space;
357 }
358 
359 /*
360  * Configuration messages exchanged via NETLINK_GENERIC use the following
361  * family id, name, version and command.
362  */
363 #define TIPC_GENL_NAME          "TIPC"
364 #define TIPC_GENL_VERSION       0x1
365 #define TIPC_GENL_CMD           0x1
366 
367 /*
368  * TIPC specific header used in NETLINK_GENERIC requests.
369  */
370 struct tipc_genlmsghdr {
371         __u32 dest;             /* Destination address */
372         __u16 cmd;              /* Command */
373         __u16 reserved;         /* Unused */
374 };
375 
376 #define TIPC_GENL_HDRLEN        NLMSG_ALIGN(sizeof(struct tipc_genlmsghdr))
377 
378 /*
379  * Configuration messages exchanged via TIPC sockets use the TIPC configuration 
380  * message header, which is defined below.  This structure is analogous 
381  * to the Netlink message header, but fields are stored in network byte order 
382  * and no padding is permitted between the header and the message data 
383  * that follows.
384  */
385 
386 struct tipc_cfg_msg_hdr
387 {
388         __be32 tcm_len;         /* Message length (including header) */
389         __be16 tcm_type;        /* Command type */
390         __be16 tcm_flags;       /* Additional flags */
391         char  tcm_reserved[8];  /* Unused */
392 };
393 
394 #define TCM_F_REQUEST   0x1     /* Flag: Request message */
395 #define TCM_F_MORE      0x2     /* Flag: Message to be continued */
396 
397 #define TCM_ALIGN(datalen)  (((datalen)+3) & ~3)
398 #define TCM_LENGTH(datalen) (sizeof(struct tipc_cfg_msg_hdr) + datalen)
399 #define TCM_SPACE(datalen)  (TCM_ALIGN(TCM_LENGTH(datalen)))
400 #define TCM_DATA(tcm_hdr)   ((void *)((char *)(tcm_hdr) + TCM_LENGTH(0)))
401 
402 static inline int TCM_SET(void *msg, __u16 cmd, __u16 flags,
403                           void *data, __u16 data_len)
404 {
405         struct tipc_cfg_msg_hdr *tcm_hdr;
406         int msg_len;
407 
408         msg_len = TCM_LENGTH(data_len);
409         tcm_hdr = (struct tipc_cfg_msg_hdr *)msg;
410         tcm_hdr->tcm_len   = htonl(msg_len);
411         tcm_hdr->tcm_type  = htons(cmd);
412         tcm_hdr->tcm_flags = htons(flags);
413         if (data_len && data)
414                 memcpy(TCM_DATA(msg), data, data_len);
415         return TCM_SPACE(data_len);
416 }
417 
418 #endif
419 

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