1/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */ 2/* 3 * include/uapi/linux/tipc_config.h: Header for TIPC configuration interface 4 * 5 * Copyright (c) 2003-2006, Ericsson AB 6 * Copyright (c) 2005-2007, 2010-2011, Wind River Systems 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 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the names of the copyright holders nor the names of its 18 * contributors may be used to endorse or promote products derived from 19 * this software without specific prior written permission. 20 * 21 * Alternatively, this software may be distributed under the terms of the 22 * GNU General Public License ("GPL") version 2 as published by the Free 23 * Software Foundation. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 26 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 29 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38#ifndef _LINUX_TIPC_CONFIG_H_ 39#define _LINUX_TIPC_CONFIG_H_ 40 41#include <linux/types.h> 42#include <linux/string.h> 43#include <linux/tipc.h> 44#include <asm/byteorder.h> 45 46/* 47 * Configuration 48 * 49 * All configuration management messaging involves sending a request message 50 * to the TIPC configuration service on a node, which sends a reply message 51 * back. (In the future multi-message replies may be supported.) 52 * 53 * Both request and reply messages consist of a transport header and payload. 54 * The transport header contains info about the desired operation; 55 * the payload consists of zero or more type/length/value (TLV) items 56 * which specify parameters or results for the operation. 57 * 58 * For many operations, the request and reply messages have a fixed number 59 * of TLVs (usually zero or one); however, some reply messages may return 60 * a variable number of TLVs. A failed request is denoted by the presence 61 * of an "error string" TLV in the reply message instead of the TLV(s) the 62 * reply should contain if the request succeeds. 63 */ 64 65/* 66 * Public commands: 67 * May be issued by any process. 68 * Accepted by own node, or by remote node only if remote management enabled. 69 */ 70 71#define TIPC_CMD_NOOP 0x0000 /* tx none, rx none */ 72#define TIPC_CMD_GET_NODES 0x0001 /* tx net_addr, rx node_info(s) */ 73#define TIPC_CMD_GET_MEDIA_NAMES 0x0002 /* tx none, rx media_name(s) */ 74#define TIPC_CMD_GET_BEARER_NAMES 0x0003 /* tx none, rx bearer_name(s) */ 75#define TIPC_CMD_GET_LINKS 0x0004 /* tx net_addr, rx link_info(s) */ 76#define TIPC_CMD_SHOW_NAME_TABLE 0x0005 /* tx name_tbl_query, rx ultra_string */ 77#define TIPC_CMD_SHOW_PORTS 0x0006 /* tx none, rx ultra_string */ 78#define TIPC_CMD_SHOW_LINK_STATS 0x000B /* tx link_name, rx ultra_string */ 79#define TIPC_CMD_SHOW_STATS 0x000F /* tx unsigned, rx ultra_string */ 80 81/* 82 * Protected commands: 83 * May only be issued by "network administration capable" process. 84 * Accepted by own node, or by remote node only if remote management enabled 85 * and this node is zone manager. 86 */ 87 88#define TIPC_CMD_GET_REMOTE_MNG 0x4003 /* tx none, rx unsigned */ 89#define TIPC_CMD_GET_MAX_PORTS 0x4004 /* tx none, rx unsigned */ 90#define TIPC_CMD_GET_MAX_PUBL 0x4005 /* obsoleted */ 91#define TIPC_CMD_GET_MAX_SUBSCR 0x4006 /* obsoleted */ 92#define TIPC_CMD_GET_MAX_ZONES 0x4007 /* obsoleted */ 93#define TIPC_CMD_GET_MAX_CLUSTERS 0x4008 /* obsoleted */ 94#define TIPC_CMD_GET_MAX_NODES 0x4009 /* obsoleted */ 95#define TIPC_CMD_GET_MAX_SLAVES 0x400A /* obsoleted */ 96#define TIPC_CMD_GET_NETID 0x400B /* tx none, rx unsigned */ 97 98#define TIPC_CMD_ENABLE_BEARER 0x4101 /* tx bearer_config, rx none */ 99#define TIPC_CMD_DISABLE_BEARER 0x4102 /* tx bearer_name, rx none */ 100#define TIPC_CMD_SET_LINK_TOL 0x4107 /* tx link_config, rx none */ 101#define TIPC_CMD_SET_LINK_PRI 0x4108 /* tx link_config, rx none */ 102#define TIPC_CMD_SET_LINK_WINDOW 0x4109 /* tx link_config, rx none */ 103#define TIPC_CMD_SET_LOG_SIZE 0x410A /* obsoleted */ 104#define TIPC_CMD_DUMP_LOG 0x410B /* obsoleted */ 105#define TIPC_CMD_RESET_LINK_STATS 0x410C /* tx link_name, rx none */ 106 107/* 108 * Private commands: 109 * May only be issued by "network administration capable" process. 110 * Accepted by own node only; cannot be used on a remote node. 111 */ 112 113#define TIPC_CMD_SET_NODE_ADDR 0x8001 /* tx net_addr, rx none */ 114#define TIPC_CMD_SET_REMOTE_MNG 0x8003 /* tx unsigned, rx none */ 115#define TIPC_CMD_SET_MAX_PORTS 0x8004 /* tx unsigned, rx none */ 116#define TIPC_CMD_SET_MAX_PUBL 0x8005 /* obsoleted */ 117#define TIPC_CMD_SET_MAX_SUBSCR 0x8006 /* obsoleted */ 118#define TIPC_CMD_SET_MAX_ZONES 0x8007 /* obsoleted */ 119#define TIPC_CMD_SET_MAX_CLUSTERS 0x8008 /* obsoleted */ 120#define TIPC_CMD_SET_MAX_NODES 0x8009 /* obsoleted */ 121#define TIPC_CMD_SET_MAX_SLAVES 0x800A /* obsoleted */ 122#define TIPC_CMD_SET_NETID 0x800B /* tx unsigned, rx none */ 123 124/* 125 * Reserved commands: 126 * May not be issued by any process. 127 * Used internally by TIPC. 128 */ 129 130#define TIPC_CMD_NOT_NET_ADMIN 0xC001 /* tx none, rx none */ 131 132/* 133 * TLV types defined for TIPC 134 */ 135 136#define TIPC_TLV_NONE 0 /* no TLV present */ 137#define TIPC_TLV_VOID 1 /* empty TLV (0 data bytes)*/ 138#define TIPC_TLV_UNSIGNED 2 /* 32-bit integer */ 139#define TIPC_TLV_STRING 3 /* char[128] (max) */ 140#define TIPC_TLV_LARGE_STRING 4 /* char[2048] (max) */ 141#define TIPC_TLV_ULTRA_STRING 5 /* char[32768] (max) */ 142 143#define TIPC_TLV_ERROR_STRING 16 /* char[128] containing "error code" */ 144#define TIPC_TLV_NET_ADDR 17 /* 32-bit integer denoting <Z.C.N> */ 145#define TIPC_TLV_MEDIA_NAME 18 /* char[TIPC_MAX_MEDIA_NAME] */ 146#define TIPC_TLV_BEARER_NAME 19 /* char[TIPC_MAX_BEARER_NAME] */ 147#define TIPC_TLV_LINK_NAME 20 /* char[TIPC_MAX_LINK_NAME] */ 148#define TIPC_TLV_NODE_INFO 21 /* struct tipc_node_info */ 149#define TIPC_TLV_LINK_INFO 22 /* struct tipc_link_info */ 150#define TIPC_TLV_BEARER_CONFIG 23 /* struct tipc_bearer_config */ 151#define TIPC_TLV_LINK_CONFIG 24 /* struct tipc_link_config */ 152#define TIPC_TLV_NAME_TBL_QUERY 25 /* struct tipc_name_table_query */ 153#define TIPC_TLV_PORT_REF 26 /* 32-bit port reference */ 154 155/* 156 * Link priority limits (min, default, max, media default) 157 */ 158 159#define TIPC_MIN_LINK_PRI 0 160#define TIPC_DEF_LINK_PRI 10 161#define TIPC_MAX_LINK_PRI 31 162#define TIPC_MEDIA_LINK_PRI (TIPC_MAX_LINK_PRI + 1) 163 164/* 165 * Link tolerance limits (min, default, max), in ms 166 */ 167 168#define TIPC_MIN_LINK_TOL 50 169#define TIPC_DEF_LINK_TOL 1500 170#define TIPC_MAX_LINK_TOL 30000 171 172#if (TIPC_MIN_LINK_TOL < 16) 173#error "TIPC_MIN_LINK_TOL is too small (abort limit may be NaN)" 174#endif 175 176/* 177 * Link window limits (min, default, max), in packets 178 */ 179 180#define TIPC_MIN_LINK_WIN 16 181#define TIPC_DEF_LINK_WIN 50 182#define TIPC_MAX_LINK_WIN 8191 183 184/* 185 * Default MTU for UDP media 186 */ 187 188#define TIPC_DEF_LINK_UDP_MTU 14000 189 190struct tipc_node_info { 191 __be32 addr; /* network address of node */ 192 __be32 up; /* 0=down, 1= up */ 193}; 194 195struct tipc_link_info { 196 __be32 dest; /* network address of peer node */ 197 __be32 up; /* 0=down, 1=up */ 198 char str[TIPC_MAX_LINK_NAME]; /* link name */ 199}; 200 201struct tipc_bearer_config { 202 __be32 priority; /* Range [1,31]. Override per link */ 203 __be32 disc_domain; /* <Z.C.N> describing desired nodes */ 204 char name[TIPC_MAX_BEARER_NAME]; 205}; 206 207struct tipc_link_config { 208 __be32 value; 209 char name[TIPC_MAX_LINK_NAME]; 210}; 211 212#define TIPC_NTQ_ALLTYPES 0x80000000 213 214struct tipc_name_table_query { 215 __be32 depth; /* 1:type, 2:+name info, 3:+port info, 4+:+debug info */ 216 __be32 type; /* {t,l,u} info ignored if high bit of "depth" is set */ 217 __be32 lowbound; /* (i.e. displays all entries of name table) */ 218 __be32 upbound; 219}; 220 221/* 222 * The error string TLV is a null-terminated string describing the cause 223 * of the request failure. To simplify error processing (and to save space) 224 * the first character of the string can be a special error code character 225 * (lying by the range 0x80 to 0xFF) which represents a pre-defined reason. 226 */ 227 228#define TIPC_CFG_TLV_ERROR "\x80" /* request contains incorrect TLV(s) */ 229#define TIPC_CFG_NOT_NET_ADMIN "\x81" /* must be network administrator */ 230#define TIPC_CFG_NOT_ZONE_MSTR "\x82" /* must be zone master */ 231#define TIPC_CFG_NO_REMOTE "\x83" /* remote management not enabled */ 232#define TIPC_CFG_NOT_SUPPORTED "\x84" /* request is not supported by TIPC */ 233#define TIPC_CFG_INVALID_VALUE "\x85" /* request has invalid argument value */ 234 235/* 236 * A TLV consists of a descriptor, followed by the TLV value. 237 * TLV descriptor fields are stored in network byte order; 238 * TLV values must also be stored in network byte order (where applicable). 239 * TLV descriptors must be aligned to addresses which are multiple of 4, 240 * so up to 3 bytes of padding may exist at the end of the TLV value area. 241 * There must not be any padding between the TLV descriptor and its value. 242 */ 243 244struct tlv_desc { 245 __be16 tlv_len; /* TLV length (descriptor + value) */ 246 __be16 tlv_type; /* TLV identifier */ 247}; 248 249#define TLV_ALIGNTO 4 250 251#define TLV_ALIGN(datalen) (((datalen)+(TLV_ALIGNTO-1)) & ~(TLV_ALIGNTO-1)) 252#define TLV_LENGTH(datalen) (sizeof(struct tlv_desc) + (datalen)) 253#define TLV_SPACE(datalen) (TLV_ALIGN(TLV_LENGTH(datalen))) 254#define TLV_DATA(tlv) ((void *)((char *)(tlv) + TLV_LENGTH(0))) 255 256static inline int TLV_OK(const void *tlv, __u16 space) 257{ 258 /* 259 * Would also like to check that "tlv" is a multiple of 4, 260 * but don't know how to do this in a portable way. 261 * - Tried doing (!(tlv & (TLV_ALIGNTO-1))), but GCC compiler 262 * won't allow binary "&" with a pointer. 263 * - Tried casting "tlv" to integer type, but causes warning about size 264 * mismatch when pointer is bigger than chosen type (int, long, ...). 265 */ 266 267 return (space >= TLV_SPACE(0)) && 268 (__be16_to_cpu(((struct tlv_desc *)tlv)->tlv_len) <= space); 269} 270 271static inline int TLV_CHECK(const void *tlv, __u16 space, __u16 exp_type) 272{ 273 return TLV_OK(tlv, space) && 274 (__be16_to_cpu(((struct tlv_desc *)tlv)->tlv_type) == exp_type); 275} 276 277static inline int TLV_GET_LEN(struct tlv_desc *tlv) 278{ 279 return __be16_to_cpu(tlv->tlv_len); 280} 281 282static inline void TLV_SET_LEN(struct tlv_desc *tlv, __u16 len) 283{ 284 tlv->tlv_len = __cpu_to_be16(len); 285} 286 287static inline int TLV_CHECK_TYPE(struct tlv_desc *tlv, __u16 type) 288{ 289 return (__be16_to_cpu(tlv->tlv_type) == type); 290} 291 292static inline void TLV_SET_TYPE(struct tlv_desc *tlv, __u16 type) 293{ 294 tlv->tlv_type = __cpu_to_be16(type); 295} 296 297static inline int TLV_SET(void *tlv, __u16 type, void *data, __u16 len) 298{ 299 struct tlv_desc *tlv_ptr; 300 int tlv_len; 301 302 tlv_len = TLV_LENGTH(len); 303 tlv_ptr = (struct tlv_desc *)tlv; 304 tlv_ptr->tlv_type = __cpu_to_be16(type); 305 tlv_ptr->tlv_len = __cpu_to_be16(tlv_len); 306 if (len && data) { 307 memcpy(TLV_DATA(tlv_ptr), data, len); 308 memset((char *)TLV_DATA(tlv_ptr) + len, 0, TLV_SPACE(len) - tlv_len); 309 } 310 return TLV_SPACE(len); 311} 312 313/* 314 * A TLV list descriptor simplifies processing of messages 315 * containing multiple TLVs. 316 */ 317 318struct tlv_list_desc { 319 struct tlv_desc *tlv_ptr; /* ptr to current TLV */ 320 __u32 tlv_space; /* # bytes from curr TLV to list end */ 321}; 322 323static inline void TLV_LIST_INIT(struct tlv_list_desc *list, 324 void *data, __u32 space) 325{ 326 list->tlv_ptr = (struct tlv_desc *)data; 327 list->tlv_space = space; 328} 329 330static inline int TLV_LIST_EMPTY(struct tlv_list_desc *list) 331{ 332 return (list->tlv_space == 0); 333} 334 335static inline int TLV_LIST_CHECK(struct tlv_list_desc *list, __u16 exp_type) 336{ 337 return TLV_CHECK(list->tlv_ptr, list->tlv_space, exp_type); 338} 339 340static inline void *TLV_LIST_DATA(struct tlv_list_desc *list) 341{ 342 return TLV_DATA(list->tlv_ptr); 343} 344 345static inline void TLV_LIST_STEP(struct tlv_list_desc *list) 346{ 347 __u16 tlv_space = TLV_ALIGN(__be16_to_cpu(list->tlv_ptr->tlv_len)); 348 349 list->tlv_ptr = (struct tlv_desc *)((char *)list->tlv_ptr + tlv_space); 350 list->tlv_space -= tlv_space; 351} 352 353/* 354 * Configuration messages exchanged via NETLINK_GENERIC use the following 355 * family id, name, version and command. 356 */ 357#define TIPC_GENL_NAME "TIPC" 358#define TIPC_GENL_VERSION 0x1 359#define TIPC_GENL_CMD 0x1 360 361/* 362 * TIPC specific header used in NETLINK_GENERIC requests. 363 */ 364struct tipc_genlmsghdr { 365 __u32 dest; /* Destination address */ 366 __u16 cmd; /* Command */ 367 __u16 reserved; /* Unused */ 368}; 369 370#define TIPC_GENL_HDRLEN NLMSG_ALIGN(sizeof(struct tipc_genlmsghdr)) 371 372/* 373 * Configuration messages exchanged via TIPC sockets use the TIPC configuration 374 * message header, which is defined below. This structure is analogous 375 * to the Netlink message header, but fields are stored in network byte order 376 * and no padding is permitted between the header and the message data 377 * that follows. 378 */ 379 380struct tipc_cfg_msg_hdr { 381 __be32 tcm_len; /* Message length (including header) */ 382 __be16 tcm_type; /* Command type */ 383 __be16 tcm_flags; /* Additional flags */ 384 char tcm_reserved[8]; /* Unused */ 385}; 386 387#define TCM_F_REQUEST 0x1 /* Flag: Request message */ 388#define TCM_F_MORE 0x2 /* Flag: Message to be continued */ 389 390#define TCM_ALIGN(datalen) (((datalen)+3) & ~3) 391#define TCM_LENGTH(datalen) (sizeof(struct tipc_cfg_msg_hdr) + datalen) 392#define TCM_SPACE(datalen) (TCM_ALIGN(TCM_LENGTH(datalen))) 393#define TCM_DATA(tcm_hdr) ((void *)((char *)(tcm_hdr) + TCM_LENGTH(0))) 394 395static inline int TCM_SET(void *msg, __u16 cmd, __u16 flags, 396 void *data, __u16 data_len) 397{ 398 struct tipc_cfg_msg_hdr *tcm_hdr; 399 int msg_len; 400 401 msg_len = TCM_LENGTH(data_len); 402 tcm_hdr = (struct tipc_cfg_msg_hdr *)msg; 403 tcm_hdr->tcm_len = __cpu_to_be32(msg_len); 404 tcm_hdr->tcm_type = __cpu_to_be16(cmd); 405 tcm_hdr->tcm_flags = __cpu_to_be16(flags); 406 if (data_len && data) { 407 memcpy(TCM_DATA(msg), data, data_len); 408 memset((char *)TCM_DATA(msg) + data_len, 0, TCM_SPACE(data_len) - msg_len); 409 } 410 return TCM_SPACE(data_len); 411} 412 413#endif 414