include/linux/tipc_config.h

   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, 2010-2011, 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 #ifndef __KERNEL__
  45 #include <arpa/inet.h> /* for ntohs etc. */
  46 #endif
  47
  48 /*
  49  * Configuration
  50  *
  51  * All configuration management messaging involves sending a request message
  52  * to the TIPC configuration service on a node, which sends a reply message
  53  * back.  (In the future multi-message replies may be supported.)
  54  *
  55  * Both request and reply messages consist of a transport header and payload.
  56  * The transport header contains info about the desired operation;
  57  * the payload consists of zero or more type/length/value (TLV) items
  58  * which specify parameters or results for the operation.
  59  *
  60  * For many operations, the request and reply messages have a fixed number
  61  * of TLVs (usually zero or one); however, some reply messages may return
  62  * a variable number of TLVs.  A failed request is denoted by the presence
  63  * of an "error string" TLV in the reply message instead of the TLV(s) the
  64  * reply should contain if the request succeeds.
  65  */
  66
  67 /*
  68  * Public commands:
  69  * May be issued by any process.
  70  * Accepted by own node, or by remote node only if remote management enabled.
  71  */
  72
  73 #define  TIPC_CMD_NOOP              0x0000    /* tx none, rx none */
  74 #define  TIPC_CMD_GET_NODES         0x0001    /* tx net_addr, rx node_info(s) */
  75 #define  TIPC_CMD_GET_MEDIA_NAMES   0x0002    /* tx none, rx media_name(s) */
  76 #define  TIPC_CMD_GET_BEARER_NAMES  0x0003    /* tx none, rx bearer_name(s) */
  77 #define  TIPC_CMD_GET_LINKS         0x0004    /* tx net_addr, rx link_info(s) */
  78 #define  TIPC_CMD_SHOW_NAME_TABLE   0x0005    /* tx name_tbl_query, rx ultra_string */
  79 #define  TIPC_CMD_SHOW_PORTS        0x0006    /* tx none, rx ultra_string */
  80 #define  TIPC_CMD_SHOW_LINK_STATS   0x000B    /* tx link_name, rx ultra_string */
  81 #define  TIPC_CMD_SHOW_STATS        0x000F    /* tx unsigned, rx ultra_string */
  82
  83 /*
  84  * Protected commands:
  85  * May only be issued by "network administration capable" process.
  86  * Accepted by own node, or by remote node only if remote management enabled
  87  * and this node is zone manager.
  88  */
  89
  90 #define  TIPC_CMD_GET_REMOTE_MNG    0x4003    /* tx none, rx unsigned */
  91 #define  TIPC_CMD_GET_MAX_PORTS     0x4004    /* tx none, rx unsigned */
  92 #define  TIPC_CMD_GET_MAX_PUBL      0x4005    /* tx none, rx unsigned */
  93 #define  TIPC_CMD_GET_MAX_SUBSCR    0x4006    /* tx none, rx unsigned */
  94 #define  TIPC_CMD_GET_MAX_ZONES     0x4007    /* obsoleted */
  95 #define  TIPC_CMD_GET_MAX_CLUSTERS  0x4008    /* obsoleted */
  96 #define  TIPC_CMD_GET_MAX_NODES     0x4009    /* obsoleted */
  97 #define  TIPC_CMD_GET_MAX_SLAVES    0x400A    /* obsoleted */
  98 #define  TIPC_CMD_GET_NETID         0x400B    /* tx none, rx unsigned */
  99
 100 #define  TIPC_CMD_ENABLE_BEARER     0x4101    /* tx bearer_config, rx none */
 101 #define  TIPC_CMD_DISABLE_BEARER    0x4102    /* tx bearer_name, rx none */
 102 #define  TIPC_CMD_SET_LINK_TOL      0x4107    /* tx link_config, rx none */
 103 #define  TIPC_CMD_SET_LINK_PRI      0x4108    /* tx link_config, rx none */
 104 #define  TIPC_CMD_SET_LINK_WINDOW   0x4109    /* tx link_config, rx none */
 105 #define  TIPC_CMD_SET_LOG_SIZE      0x410A    /* tx unsigned, rx none */
 106 #define  TIPC_CMD_DUMP_LOG          0x410B    /* tx none, rx ultra_string */
 107 #define  TIPC_CMD_RESET_LINK_STATS  0x410C    /* tx link_name, rx none */
 108
 109 /*
 110  * Private commands:
 111  * May only be issued by "network administration capable" process.
 112  * Accepted by own node only; cannot be used on a remote node.
 113  */
 114
 115 #define  TIPC_CMD_SET_NODE_ADDR     0x8001    /* tx net_addr, rx none */
 116 #define  TIPC_CMD_SET_REMOTE_MNG    0x8003    /* tx unsigned, rx none */
 117 #define  TIPC_CMD_SET_MAX_PORTS     0x8004    /* tx unsigned, rx none */
 118 #define  TIPC_CMD_SET_MAX_PUBL      0x8005    /* tx unsigned, rx none */
 119 #define  TIPC_CMD_SET_MAX_SUBSCR    0x8006    /* tx unsigned, rx none */
 120 #define  TIPC_CMD_SET_MAX_ZONES     0x8007    /* obsoleted */
 121 #define  TIPC_CMD_SET_MAX_CLUSTERS  0x8008    /* obsoleted */
 122 #define  TIPC_CMD_SET_MAX_NODES     0x8009    /* obsoleted */
 123 #define  TIPC_CMD_SET_MAX_SLAVES    0x800A    /* obsoleted */
 124 #define  TIPC_CMD_SET_NETID         0x800B    /* tx unsigned, rx none */
 125
 126 /*
 127  * Reserved commands:
 128  * May not be issued by any process.
 129  * Used internally by TIPC.
 130  */
 131
 132 #define  TIPC_CMD_NOT_NET_ADMIN     0xC001    /* tx none, rx none */
 133
 134 /*
 135  * TLV types defined for TIPC
 136  */
 137
 138 #define TIPC_TLV_NONE           0       /* no TLV present */
 139 #define TIPC_TLV_VOID           1       /* empty TLV (0 data bytes)*/
 140 #define TIPC_TLV_UNSIGNED       2       /* 32-bit integer */
 141 #define TIPC_TLV_STRING         3       /* char[128] (max) */
 142 #define TIPC_TLV_LARGE_STRING   4       /* char[2048] (max) */
 143 #define TIPC_TLV_ULTRA_STRING   5       /* char[32768] (max) */
 144
 145 #define TIPC_TLV_ERROR_STRING   16      /* char[128] containing "error code" */
 146 #define TIPC_TLV_NET_ADDR       17      /* 32-bit integer denoting <Z.C.N> */
 147 #define TIPC_TLV_MEDIA_NAME     18      /* char[TIPC_MAX_MEDIA_NAME] */
 148 #define TIPC_TLV_BEARER_NAME    19      /* char[TIPC_MAX_BEARER_NAME] */
 149 #define TIPC_TLV_LINK_NAME      20      /* char[TIPC_MAX_LINK_NAME] */
 150 #define TIPC_TLV_NODE_INFO      21      /* struct tipc_node_info */
 151 #define TIPC_TLV_LINK_INFO      22      /* struct tipc_link_info */
 152 #define TIPC_TLV_BEARER_CONFIG  23      /* struct tipc_bearer_config */
 153 #define TIPC_TLV_LINK_CONFIG    24      /* struct tipc_link_config */
 154 #define TIPC_TLV_NAME_TBL_QUERY 25      /* struct tipc_name_table_query */
 155 #define TIPC_TLV_PORT_REF       26      /* 32-bit port reference */
 156
 157 /*
 158  * Maximum sizes of TIPC bearer-related names (including terminating NUL)
 159  */
 160
 161 #define TIPC_MAX_MEDIA_NAME     16      /* format = media */
 162 #define TIPC_MAX_IF_NAME        16      /* format = interface */
 163 #define TIPC_MAX_BEARER_NAME    32      /* format = media:interface */
 164 #define TIPC_MAX_LINK_NAME      60      /* format = Z.C.N:interface-Z.C.N:interface */
 165
 166 /*
 167  * Link priority limits (min, default, max, media default)
 168  */
 169
 170 #define TIPC_MIN_LINK_PRI       0
 171 #define TIPC_DEF_LINK_PRI       10
 172 #define TIPC_MAX_LINK_PRI       31
 173 #define TIPC_MEDIA_LINK_PRI     (TIPC_MAX_LINK_PRI + 1)
 174
 175 /*
 176  * Link tolerance limits (min, default, max), in ms
 177  */
 178
 179 #define TIPC_MIN_LINK_TOL 50
 180 #define TIPC_DEF_LINK_TOL 1500
 181 #define TIPC_MAX_LINK_TOL 30000
 182
 183 #if (TIPC_MIN_LINK_TOL < 16)
 184 #error "TIPC_MIN_LINK_TOL is too small (abort limit may be NaN)"
 185 #endif
 186
 187 /*
 188  * Link window limits (min, default, max), in packets
 189  */
 190
 191 #define TIPC_MIN_LINK_WIN 16
 192 #define TIPC_DEF_LINK_WIN 50
 193 #define TIPC_MAX_LINK_WIN 150
 194
 195
 196 struct tipc_node_info {
 197         __be32 addr;                    /* network address of node */
 198         __be32 up;                      /* 0=down, 1= up */
 199 };
 200
 201 struct tipc_link_info {
 202         __be32 dest;                    /* network address of peer node */
 203         __be32 up;                      /* 0=down, 1=up */
 204         char str[TIPC_MAX_LINK_NAME];   /* link name */
 205 };
 206
 207 struct tipc_bearer_config {
 208         __be32 priority;                /* Range [1,31]. Override per link  */
 209         __be32 disc_domain;             /* <Z.C.N> describing desired nodes */
 210         char name[TIPC_MAX_BEARER_NAME];
 211 };
 212
 213 struct tipc_link_config {
 214         __be32 value;
 215         char name[TIPC_MAX_LINK_NAME];
 216 };
 217
 218 #define TIPC_NTQ_ALLTYPES 0x80000000
 219
 220 struct tipc_name_table_query {
 221         __be32 depth;   /* 1:type, 2:+name info, 3:+port info, 4+:+debug info */
 222         __be32 type;    /* {t,l,u} info ignored if high bit of "depth" is set */
 223         __be32 lowbound; /* (i.e. displays all entries of name table) */
 224         __be32 upbound;
 225 };
 226
 227 /*
 228  * The error string TLV is a null-terminated string describing the cause
 229  * of the request failure.  To simplify error processing (and to save space)
 230  * the first character of the string can be a special error code character
 231  * (lying by the range 0x80 to 0xFF) which represents a pre-defined reason.
 232  */
 233
 234 #define TIPC_CFG_TLV_ERROR      "\x80"  /* request contains incorrect TLV(s) */
 235 #define TIPC_CFG_NOT_NET_ADMIN  "\x81"  /* must be network administrator */
 236 #define TIPC_CFG_NOT_ZONE_MSTR  "\x82"  /* must be zone master */
 237 #define TIPC_CFG_NO_REMOTE      "\x83"  /* remote management not enabled */
 238 #define TIPC_CFG_NOT_SUPPORTED  "\x84"  /* request is not supported by TIPC */
 239 #define TIPC_CFG_INVALID_VALUE  "\x85"  /* request has invalid argument value */
 240
 241 /*
 242  * A TLV consists of a descriptor, followed by the TLV value.
 243  * TLV descriptor fields are stored in network byte order;
 244  * TLV values must also be stored in network byte order (where applicable).
 245  * TLV descriptors must be aligned to addresses which are multiple of 4,
 246  * so up to 3 bytes of padding may exist at the end of the TLV value area.
 247  * There must not be any padding between the TLV descriptor and its value.
 248  */
 249
 250 struct tlv_desc {
 251         __be16 tlv_len;         /* TLV length (descriptor + value) */
 252         __be16 tlv_type;                /* TLV identifier */
 253 };
 254
 255 #define TLV_ALIGNTO 4
 256
 257 #define TLV_ALIGN(datalen) (((datalen)+(TLV_ALIGNTO-1)) & ~(TLV_ALIGNTO-1))
 258 #define TLV_LENGTH(datalen) (sizeof(struct tlv_desc) + (datalen))
 259 #define TLV_SPACE(datalen) (TLV_ALIGN(TLV_LENGTH(datalen)))
 260 #define TLV_DATA(tlv) ((void *)((char *)(tlv) + TLV_LENGTH(0)))
 261
 262 static inline int TLV_OK(const void *tlv, __u16 space)
 263 {
 264         /*
 265          * Would also like to check that "tlv" is a multiple of 4,
 266          * but don't know how to do this in a portable way.
 267          * - Tried doing (!(tlv & (TLV_ALIGNTO-1))), but GCC compiler
 268          *   won't allow binary "&" with a pointer.
 269          * - Tried casting "tlv" to integer type, but causes warning about size
 270          *   mismatch when pointer is bigger than chosen type (int, long, ...).
 271          */
 272
 273         return (space >= TLV_SPACE(0)) &&
 274                 (ntohs(((struct tlv_desc *)tlv)->tlv_len) <= space);
 275 }
 276
 277 static inline int TLV_CHECK(const void *tlv, __u16 space, __u16 exp_type)
 278 {
 279         return TLV_OK(tlv, space) &&
 280                 (ntohs(((struct tlv_desc *)tlv)->tlv_type) == exp_type);
 281 }
 282
 283 static inline int TLV_SET(void *tlv, __u16 type, void *data, __u16 len)
 284 {
 285         struct tlv_desc *tlv_ptr;
 286         int tlv_len;
 287
 288         tlv_len = TLV_LENGTH(len);
 289         tlv_ptr = (struct tlv_desc *)tlv;
 290         tlv_ptr->tlv_type = htons(type);
 291         tlv_ptr->tlv_len  = htons(tlv_len);
 292         if (len && data)
 293                 memcpy(TLV_DATA(tlv_ptr), data, tlv_len);
 294         return TLV_SPACE(len);
 295 }
 296
 297 /*
 298  * A TLV list descriptor simplifies processing of messages
 299  * containing multiple TLVs.
 300  */
 301
 302 struct tlv_list_desc {
 303         struct tlv_desc *tlv_ptr;       /* ptr to current TLV */
 304         __u32 tlv_space;                /* # bytes from curr TLV to list end */
 305 };
 306
 307 static inline void TLV_LIST_INIT(struct tlv_list_desc *list,
 308                                  void *data, __u32 space)
 309 {
 310         list->tlv_ptr = (struct tlv_desc *)data;
 311         list->tlv_space = space;
 312 }
 313
 314 static inline int TLV_LIST_EMPTY(struct tlv_list_desc *list)
 315 {
 316         return (list->tlv_space == 0);
 317 }
 318
 319 static inline int TLV_LIST_CHECK(struct tlv_list_desc *list, __u16 exp_type)
 320 {
 321         return TLV_CHECK(list->tlv_ptr, list->tlv_space, exp_type);
 322 }
 323
 324 static inline void *TLV_LIST_DATA(struct tlv_list_desc *list)
 325 {
 326         return TLV_DATA(list->tlv_ptr);
 327 }
 328
 329 static inline void TLV_LIST_STEP(struct tlv_list_desc *list)
 330 {
 331         __u16 tlv_space = TLV_ALIGN(ntohs(list->tlv_ptr->tlv_len));
 332
 333         list->tlv_ptr = (struct tlv_desc *)((char *)list->tlv_ptr + tlv_space);
 334         list->tlv_space -= tlv_space;
 335 }
 336
 337 /*
 338  * Configuration messages exchanged via NETLINK_GENERIC use the following
 339  * family id, name, version and command.
 340  */
 341 #define TIPC_GENL_NAME          "TIPC"
 342 #define TIPC_GENL_VERSION       0x1
 343 #define TIPC_GENL_CMD           0x1
 344
 345 /*
 346  * TIPC specific header used in NETLINK_GENERIC requests.
 347  */
 348 struct tipc_genlmsghdr {
 349         __u32 dest;             /* Destination address */
 350         __u16 cmd;              /* Command */
 351         __u16 reserved;         /* Unused */
 352 };
 353
 354 #define TIPC_GENL_HDRLEN        NLMSG_ALIGN(sizeof(struct tipc_genlmsghdr))
 355
 356 /*
 357  * Configuration messages exchanged via TIPC sockets use the TIPC configuration
 358  * message header, which is defined below.  This structure is analogous
 359  * to the Netlink message header, but fields are stored in network byte order
 360  * and no padding is permitted between the header and the message data
 361  * that follows.
 362  */
 363
 364 struct tipc_cfg_msg_hdr {
 365         __be32 tcm_len;         /* Message length (including header) */
 366         __be16 tcm_type;        /* Command type */
 367         __be16 tcm_flags;       /* Additional flags */
 368         char  tcm_reserved[8];  /* Unused */
 369 };
 370
 371 #define TCM_F_REQUEST   0x1     /* Flag: Request message */
 372 #define TCM_F_MORE      0x2     /* Flag: Message to be continued */
 373
 374 #define TCM_ALIGN(datalen)  (((datalen)+3) & ~3)
 375 #define TCM_LENGTH(datalen) (sizeof(struct tipc_cfg_msg_hdr) + datalen)
 376 #define TCM_SPACE(datalen)  (TCM_ALIGN(TCM_LENGTH(datalen)))
 377 #define TCM_DATA(tcm_hdr)   ((void *)((char *)(tcm_hdr) + TCM_LENGTH(0)))
 378
 379 static inline int TCM_SET(void *msg, __u16 cmd, __u16 flags,
 380                           void *data, __u16 data_len)
 381 {
 382         struct tipc_cfg_msg_hdr *tcm_hdr;
 383         int msg_len;
 384
 385         msg_len = TCM_LENGTH(data_len);
 386         tcm_hdr = (struct tipc_cfg_msg_hdr *)msg;
 387         tcm_hdr->tcm_len   = htonl(msg_len);
 388         tcm_hdr->tcm_type  = htons(cmd);
 389         tcm_hdr->tcm_flags = htons(flags);
 390         if (data_len && data)
 391                 memcpy(TCM_DATA(msg), data, data_len);
 392         return TCM_SPACE(data_len);
 393 }
 394
 395 #endif