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