include/uapi/linux/tipc_config.h

   1 /*
   2  * include/uapi/linux/tipc_config.h: Header 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 <linux/tipc.h>
  43 #include <asm/byteorder.h>
  44
  45 #ifndef __KERNEL__
  46 #include <arpa/inet.h> /* for ntohs etc. */
  47 #endif
  48
  49 /*
  50  * Configuration
  51  *
  52  * All configuration management messaging involves sending a request message
  53  * to the TIPC configuration service on a node, which sends a reply message
  54  * back.  (In the future multi-message replies may be supported.)
  55  *
  56  * Both request and reply messages consist of a transport header and payload.
  57  * The transport header contains info about the desired operation;
  58  * the payload consists of zero or more type/length/value (TLV) items
  59  * which specify parameters or results for the operation.
  60  *
  61  * For many operations, the request and reply messages have a fixed number
  62  * of TLVs (usually zero or one); however, some reply messages may return
  63  * a variable number of TLVs.  A failed request is denoted by the presence
  64  * of an "error string" TLV in the reply message instead of the TLV(s) the
  65  * reply should contain if the request succeeds.
  66  */
  67
  68 /*
  69  * Public commands:
  70  * May be issued by any process.
  71  * Accepted by own node, or by remote node only if remote management enabled.
  72  */
  73
  74 #define  TIPC_CMD_NOOP              0x0000    /* tx none, rx none */
  75 #define  TIPC_CMD_GET_NODES         0x0001    /* tx net_addr, rx node_info(s) */
  76 #define  TIPC_CMD_GET_MEDIA_NAMES   0x0002    /* tx none, rx media_name(s) */
  77 #define  TIPC_CMD_GET_BEARER_NAMES  0x0003    /* tx none, rx bearer_name(s) */
  78 #define  TIPC_CMD_GET_LINKS         0x0004    /* tx net_addr, rx link_info(s) */
  79 #define  TIPC_CMD_SHOW_NAME_TABLE   0x0005    /* tx name_tbl_query, rx ultra_string */
  80 #define  TIPC_CMD_SHOW_PORTS        0x0006    /* tx none, rx ultra_string */
  81 #define  TIPC_CMD_SHOW_LINK_STATS   0x000B    /* tx link_name, rx ultra_string */
  82 #define  TIPC_CMD_SHOW_STATS        0x000F    /* tx unsigned, rx ultra_string */
  83
  84 /*
  85  * Protected commands:
  86  * May only be issued by "network administration capable" process.
  87  * Accepted by own node, or by remote node only if remote management enabled
  88  * and this node is zone manager.
  89  */
  90
  91 #define  TIPC_CMD_GET_REMOTE_MNG    0x4003    /* tx none, rx unsigned */
  92 #define  TIPC_CMD_GET_MAX_PORTS     0x4004    /* tx none, rx unsigned */
  93 #define  TIPC_CMD_GET_MAX_PUBL      0x4005    /* obsoleted */
  94 #define  TIPC_CMD_GET_MAX_SUBSCR    0x4006    /* obsoleted */
  95 #define  TIPC_CMD_GET_MAX_ZONES     0x4007    /* obsoleted */
  96 #define  TIPC_CMD_GET_MAX_CLUSTERS  0x4008    /* obsoleted */
  97 #define  TIPC_CMD_GET_MAX_NODES     0x4009    /* obsoleted */
  98 #define  TIPC_CMD_GET_MAX_SLAVES    0x400A    /* obsoleted */
  99 #define  TIPC_CMD_GET_NETID         0x400B    /* tx none, rx unsigned */
 100
 101 #define  TIPC_CMD_ENABLE_BEARER     0x4101    /* tx bearer_config, rx none */
 102 #define  TIPC_CMD_DISABLE_BEARER    0x4102    /* tx bearer_name, rx none */
 103 #define  TIPC_CMD_SET_LINK_TOL      0x4107    /* tx link_config, rx none */
 104 #define  TIPC_CMD_SET_LINK_PRI      0x4108    /* tx link_config, rx none */
 105 #define  TIPC_CMD_SET_LINK_WINDOW   0x4109    /* tx link_config, rx none */
 106 #define  TIPC_CMD_SET_LOG_SIZE      0x410A    /* obsoleted */
 107 #define  TIPC_CMD_DUMP_LOG          0x410B    /* obsoleted */
 108 #define  TIPC_CMD_RESET_LINK_STATS  0x410C    /* tx link_name, rx none */
 109
 110 /*
 111  * Private commands:
 112  * May only be issued by "network administration capable" process.
 113  * Accepted by own node only; cannot be used on a remote node.
 114  */
 115
 116 #define  TIPC_CMD_SET_NODE_ADDR     0x8001    /* tx net_addr, rx none */
 117 #define  TIPC_CMD_SET_REMOTE_MNG    0x8003    /* tx unsigned, rx none */
 118 #define  TIPC_CMD_SET_MAX_PORTS     0x8004    /* tx unsigned, rx none */
 119 #define  TIPC_CMD_SET_MAX_PUBL      0x8005    /* obsoleted */
 120 #define  TIPC_CMD_SET_MAX_SUBSCR    0x8006    /* obsoleted */
 121 #define  TIPC_CMD_SET_MAX_ZONES     0x8007    /* obsoleted */
 122 #define  TIPC_CMD_SET_MAX_CLUSTERS  0x8008    /* obsoleted */
 123 #define  TIPC_CMD_SET_MAX_NODES     0x8009    /* obsoleted */
 124 #define  TIPC_CMD_SET_MAX_SLAVES    0x800A    /* obsoleted */
 125 #define  TIPC_CMD_SET_NETID         0x800B    /* tx unsigned, rx none */
 126
 127 /*
 128  * Reserved commands:
 129  * May not be issued by any process.
 130  * Used internally by TIPC.
 131  */
 132
 133 #define  TIPC_CMD_NOT_NET_ADMIN     0xC001    /* tx none, rx none */
 134
 135 /*
 136  * TLV types defined for TIPC
 137  */
 138
 139 #define TIPC_TLV_NONE           0       /* no TLV present */
 140 #define TIPC_TLV_VOID           1       /* empty TLV (0 data bytes)*/
 141 #define TIPC_TLV_UNSIGNED       2       /* 32-bit integer */
 142 #define TIPC_TLV_STRING         3       /* char[128] (max) */
 143 #define TIPC_TLV_LARGE_STRING   4       /* char[2048] (max) */
 144 #define TIPC_TLV_ULTRA_STRING   5       /* char[32768] (max) */
 145
 146 #define TIPC_TLV_ERROR_STRING   16      /* char[128] containing "error code" */
 147 #define TIPC_TLV_NET_ADDR       17      /* 32-bit integer denoting <Z.C.N> */
 148 #define TIPC_TLV_MEDIA_NAME     18      /* char[TIPC_MAX_MEDIA_NAME] */
 149 #define TIPC_TLV_BEARER_NAME    19      /* char[TIPC_MAX_BEARER_NAME] */
 150 #define TIPC_TLV_LINK_NAME      20      /* char[TIPC_MAX_LINK_NAME] */
 151 #define TIPC_TLV_NODE_INFO      21      /* struct tipc_node_info */
 152 #define TIPC_TLV_LINK_INFO      22      /* struct tipc_link_info */
 153 #define TIPC_TLV_BEARER_CONFIG  23      /* struct tipc_bearer_config */
 154 #define TIPC_TLV_LINK_CONFIG    24      /* struct tipc_link_config */
 155 #define TIPC_TLV_NAME_TBL_QUERY 25      /* struct tipc_name_table_query */
 156 #define TIPC_TLV_PORT_REF       26      /* 32-bit port reference */
 157
 158 /*
 159  * Link priority limits (min, default, max, media default)
 160  */
 161
 162 #define TIPC_MIN_LINK_PRI       0
 163 #define TIPC_DEF_LINK_PRI       10
 164 #define TIPC_MAX_LINK_PRI       31
 165 #define TIPC_MEDIA_LINK_PRI     (TIPC_MAX_LINK_PRI + 1)
 166
 167 /*
 168  * Link tolerance limits (min, default, max), in ms
 169  */
 170
 171 #define TIPC_MIN_LINK_TOL 50
 172 #define TIPC_DEF_LINK_TOL 1500
 173 #define TIPC_MAX_LINK_TOL 30000
 174
 175 #if (TIPC_MIN_LINK_TOL < 16)
 176 #error "TIPC_MIN_LINK_TOL is too small (abort limit may be NaN)"
 177 #endif
 178
 179 /*
 180  * Link window limits (min, default, max), in packets
 181  */
 182
 183 #define TIPC_MIN_LINK_WIN 16
 184 #define TIPC_DEF_LINK_WIN 50
 185 #define TIPC_MAX_LINK_WIN 8191
 186
 187
 188 struct tipc_node_info {
 189         __be32 addr;                    /* network address of node */
 190         __be32 up;                      /* 0=down, 1= up */
 191 };
 192
 193 struct tipc_link_info {
 194         __be32 dest;                    /* network address of peer node */
 195         __be32 up;                      /* 0=down, 1=up */
 196         char str[TIPC_MAX_LINK_NAME];   /* link name */
 197 };
 198
 199 struct tipc_bearer_config {
 200         __be32 priority;                /* Range [1,31]. Override per link  */
 201         __be32 disc_domain;             /* <Z.C.N> describing desired nodes */
 202         char name[TIPC_MAX_BEARER_NAME];
 203 };
 204
 205 struct tipc_link_config {
 206         __be32 value;
 207         char name[TIPC_MAX_LINK_NAME];
 208 };
 209
 210 #define TIPC_NTQ_ALLTYPES 0x80000000
 211
 212 struct tipc_name_table_query {
 213         __be32 depth;   /* 1:type, 2:+name info, 3:+port info, 4+:+debug info */
 214         __be32 type;    /* {t,l,u} info ignored if high bit of "depth" is set */
 215         __be32 lowbound; /* (i.e. displays all entries of name table) */
 216         __be32 upbound;
 217 };
 218
 219 /*
 220  * The error string TLV is a null-terminated string describing the cause
 221  * of the request failure.  To simplify error processing (and to save space)
 222  * the first character of the string can be a special error code character
 223  * (lying by the range 0x80 to 0xFF) which represents a pre-defined reason.
 224  */
 225
 226 #define TIPC_CFG_TLV_ERROR      "\x80"  /* request contains incorrect TLV(s) */
 227 #define TIPC_CFG_NOT_NET_ADMIN  "\x81"  /* must be network administrator */
 228 #define TIPC_CFG_NOT_ZONE_MSTR  "\x82"  /* must be zone master */
 229 #define TIPC_CFG_NO_REMOTE      "\x83"  /* remote management not enabled */
 230 #define TIPC_CFG_NOT_SUPPORTED  "\x84"  /* request is not supported by TIPC */
 231 #define TIPC_CFG_INVALID_VALUE  "\x85"  /* request has invalid argument value */
 232
 233 /*
 234  * A TLV consists of a descriptor, followed by the TLV value.
 235  * TLV descriptor fields are stored in network byte order;
 236  * TLV values must also be stored in network byte order (where applicable).
 237  * TLV descriptors must be aligned to addresses which are multiple of 4,
 238  * so up to 3 bytes of padding may exist at the end of the TLV value area.
 239  * There must not be any padding between the TLV descriptor and its value.
 240  */
 241
 242 struct tlv_desc {
 243         __be16 tlv_len;         /* TLV length (descriptor + value) */
 244         __be16 tlv_type;                /* TLV identifier */
 245 };
 246
 247 #define TLV_ALIGNTO 4
 248
 249 #define TLV_ALIGN(datalen) (((datalen)+(TLV_ALIGNTO-1)) & ~(TLV_ALIGNTO-1))
 250 #define TLV_LENGTH(datalen) (sizeof(struct tlv_desc) + (datalen))
 251 #define TLV_SPACE(datalen) (TLV_ALIGN(TLV_LENGTH(datalen)))
 252 #define TLV_DATA(tlv) ((void *)((char *)(tlv) + TLV_LENGTH(0)))
 253
 254 static inline int TLV_OK(const void *tlv, __u16 space)
 255 {
 256         /*
 257          * Would also like to check that "tlv" is a multiple of 4,
 258          * but don't know how to do this in a portable way.
 259          * - Tried doing (!(tlv & (TLV_ALIGNTO-1))), but GCC compiler
 260          *   won't allow binary "&" with a pointer.
 261          * - Tried casting "tlv" to integer type, but causes warning about size
 262          *   mismatch when pointer is bigger than chosen type (int, long, ...).
 263          */
 264
 265         return (space >= TLV_SPACE(0)) &&
 266                 (ntohs(((struct tlv_desc *)tlv)->tlv_len) <= space);
 267 }
 268
 269 static inline int TLV_CHECK(const void *tlv, __u16 space, __u16 exp_type)
 270 {
 271         return TLV_OK(tlv, space) &&
 272                 (ntohs(((struct tlv_desc *)tlv)->tlv_type) == exp_type);
 273 }
 274
 275 static inline int TLV_GET_LEN(struct tlv_desc *tlv)
 276 {
 277         return ntohs(tlv->tlv_len);
 278 }
 279
 280 static inline void TLV_SET_LEN(struct tlv_desc *tlv, __u16 len)
 281 {
 282         tlv->tlv_len = htons(len);
 283 }
 284
 285 static inline int TLV_CHECK_TYPE(struct tlv_desc *tlv,  __u16 type)
 286 {
 287         return (ntohs(tlv->tlv_type) == type);
 288 }
 289
 290 static inline void TLV_SET_TYPE(struct tlv_desc *tlv, __u16 type)
 291 {
 292         tlv->tlv_type = htons(type);
 293 }
 294
 295 static inline int TLV_SET(void *tlv, __u16 type, void *data, __u16 len)
 296 {
 297         struct tlv_desc *tlv_ptr;
 298         int tlv_len;
 299
 300         tlv_len = TLV_LENGTH(len);
 301         tlv_ptr = (struct tlv_desc *)tlv;
 302         tlv_ptr->tlv_type = htons(type);
 303         tlv_ptr->tlv_len  = htons(tlv_len);
 304         if (len && data)
 305                 memcpy(TLV_DATA(tlv_ptr), data, tlv_len);
 306         return TLV_SPACE(len);
 307 }
 308
 309 /*
 310  * A TLV list descriptor simplifies processing of messages
 311  * containing multiple TLVs.
 312  */
 313
 314 struct tlv_list_desc {
 315         struct tlv_desc *tlv_ptr;       /* ptr to current TLV */
 316         __u32 tlv_space;                /* # bytes from curr TLV to list end */
 317 };
 318
 319 static inline void TLV_LIST_INIT(struct tlv_list_desc *list,
 320                                  void *data, __u32 space)
 321 {
 322         list->tlv_ptr = (struct tlv_desc *)data;
 323         list->tlv_space = space;
 324 }
 325
 326 static inline int TLV_LIST_EMPTY(struct tlv_list_desc *list)
 327 {
 328         return (list->tlv_space == 0);
 329 }
 330
 331 static inline int TLV_LIST_CHECK(struct tlv_list_desc *list, __u16 exp_type)
 332 {
 333         return TLV_CHECK(list->tlv_ptr, list->tlv_space, exp_type);
 334 }
 335
 336 static inline void *TLV_LIST_DATA(struct tlv_list_desc *list)
 337 {
 338         return TLV_DATA(list->tlv_ptr);
 339 }
 340
 341 static inline void TLV_LIST_STEP(struct tlv_list_desc *list)
 342 {
 343         __u16 tlv_space = TLV_ALIGN(ntohs(list->tlv_ptr->tlv_len));
 344
 345         list->tlv_ptr = (struct tlv_desc *)((char *)list->tlv_ptr + tlv_space);
 346         list->tlv_space -= tlv_space;
 347 }
 348
 349 /*
 350  * Configuration messages exchanged via NETLINK_GENERIC use the following
 351  * family id, name, version and command.
 352  */
 353 #define TIPC_GENL_NAME          "TIPC"
 354 #define TIPC_GENL_VERSION       0x1
 355 #define TIPC_GENL_CMD           0x1
 356
 357 /*
 358  * TIPC specific header used in NETLINK_GENERIC requests.
 359  */
 360 struct tipc_genlmsghdr {
 361         __u32 dest;             /* Destination address */
 362         __u16 cmd;              /* Command */
 363         __u16 reserved;         /* Unused */
 364 };
 365
 366 #define TIPC_GENL_HDRLEN        NLMSG_ALIGN(sizeof(struct tipc_genlmsghdr))
 367
 368 /*
 369  * Configuration messages exchanged via TIPC sockets use the TIPC configuration
 370  * message header, which is defined below.  This structure is analogous
 371  * to the Netlink message header, but fields are stored in network byte order
 372  * and no padding is permitted between the header and the message data
 373  * that follows.
 374  */
 375
 376 struct tipc_cfg_msg_hdr {
 377         __be32 tcm_len;         /* Message length (including header) */
 378         __be16 tcm_type;        /* Command type */
 379         __be16 tcm_flags;       /* Additional flags */
 380         char  tcm_reserved[8];  /* Unused */
 381 };
 382
 383 #define TCM_F_REQUEST   0x1     /* Flag: Request message */
 384 #define TCM_F_MORE      0x2     /* Flag: Message to be continued */
 385
 386 #define TCM_ALIGN(datalen)  (((datalen)+3) & ~3)
 387 #define TCM_LENGTH(datalen) (sizeof(struct tipc_cfg_msg_hdr) + datalen)
 388 #define TCM_SPACE(datalen)  (TCM_ALIGN(TCM_LENGTH(datalen)))
 389 #define TCM_DATA(tcm_hdr)   ((void *)((char *)(tcm_hdr) + TCM_LENGTH(0)))
 390
 391 static inline int TCM_SET(void *msg, __u16 cmd, __u16 flags,
 392                           void *data, __u16 data_len)
 393 {
 394         struct tipc_cfg_msg_hdr *tcm_hdr;
 395         int msg_len;
 396
 397         msg_len = TCM_LENGTH(data_len);
 398         tcm_hdr = (struct tipc_cfg_msg_hdr *)msg;
 399         tcm_hdr->tcm_len   = htonl(msg_len);
 400         tcm_hdr->tcm_type  = htons(cmd);
 401         tcm_hdr->tcm_flags = htons(flags);
 402         if (data_len && data)
 403                 memcpy(TCM_DATA(msg), data, data_len);
 404         return TCM_SPACE(data_len);
 405 }
 406
 407 #endif