1/* 2 * net/tipc/msg.h: Include file for TIPC message header routines 3 * 4 * Copyright (c) 2000-2007, 2014-2017 Ericsson AB 5 * Copyright (c) 2005-2008, 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 _TIPC_MSG_H 38#define _TIPC_MSG_H 39 40#include <linux/tipc.h> 41#include "core.h" 42 43/* 44 * Constants and routines used to read and write TIPC payload message headers 45 * 46 * Note: Some items are also used with TIPC internal message headers 47 */ 48#define TIPC_VERSION 2 49struct plist; 50 51/* 52 * Payload message users are defined in TIPC's public API: 53 * - TIPC_LOW_IMPORTANCE 54 * - TIPC_MEDIUM_IMPORTANCE 55 * - TIPC_HIGH_IMPORTANCE 56 * - TIPC_CRITICAL_IMPORTANCE 57 */ 58#define TIPC_SYSTEM_IMPORTANCE 4 59 60 61/* 62 * Payload message types 63 */ 64#define TIPC_CONN_MSG 0 65#define TIPC_MCAST_MSG 1 66#define TIPC_NAMED_MSG 2 67#define TIPC_DIRECT_MSG 3 68#define TIPC_GRP_MEMBER_EVT 4 69#define TIPC_GRP_BCAST_MSG 5 70#define TIPC_GRP_MCAST_MSG 6 71#define TIPC_GRP_UCAST_MSG 7 72 73/* 74 * Internal message users 75 */ 76#define BCAST_PROTOCOL 5 77#define MSG_BUNDLER 6 78#define LINK_PROTOCOL 7 79#define CONN_MANAGER 8 80#define GROUP_PROTOCOL 9 81#define TUNNEL_PROTOCOL 10 82#define NAME_DISTRIBUTOR 11 83#define MSG_FRAGMENTER 12 84#define LINK_CONFIG 13 85#define MSG_CRYPTO 14 86#define SOCK_WAKEUP 14 /* pseudo user */ 87#define TOP_SRV 15 /* pseudo user */ 88 89/* 90 * Message header sizes 91 */ 92#define SHORT_H_SIZE 24 /* In-cluster basic payload message */ 93#define BASIC_H_SIZE 32 /* Basic payload message */ 94#define NAMED_H_SIZE 40 /* Named payload message */ 95#define MCAST_H_SIZE 44 /* Multicast payload message */ 96#define GROUP_H_SIZE 44 /* Group payload message */ 97#define INT_H_SIZE 40 /* Internal messages */ 98#define MIN_H_SIZE 24 /* Smallest legal TIPC header size */ 99#define MAX_H_SIZE 60 /* Largest possible TIPC header size */ 100 101#define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE) 102#define TIPC_MEDIA_INFO_OFFSET 5 103 104extern const int one_page_mtu; 105 106struct tipc_skb_cb { 107 union { 108 struct { 109 struct sk_buff *tail; 110 unsigned long nxt_retr; 111 unsigned long retr_stamp; 112 u32 bytes_read; 113 u32 orig_member; 114 u16 chain_imp; 115 u16 ackers; 116 u16 retr_cnt; 117 } __packed; 118#ifdef CONFIG_TIPC_CRYPTO 119 struct { 120 struct tipc_crypto *rx; 121 struct tipc_aead *last; 122 u8 recurs; 123 } tx_clone_ctx __packed; 124#endif 125 } __packed; 126 union { 127 struct { 128 u8 validated:1; 129#ifdef CONFIG_TIPC_CRYPTO 130 u8 encrypted:1; 131 u8 decrypted:1; 132#define SKB_PROBING 1 133#define SKB_GRACING 2 134 u8 xmit_type:2; 135 u8 tx_clone_deferred:1; 136#endif 137 }; 138 u8 flags; 139 }; 140 u8 reserved; 141#ifdef CONFIG_TIPC_CRYPTO 142 void *crypto_ctx; 143#endif 144} __packed; 145 146#define TIPC_SKB_CB(__skb) ((struct tipc_skb_cb *)&((__skb)->cb[0])) 147 148struct tipc_msg { 149 __be32 hdr[15]; 150}; 151 152/* struct tipc_gap_ack - TIPC Gap ACK block 153 * @ack: seqno of the last consecutive packet in link deferdq 154 * @gap: number of gap packets since the last ack 155 * 156 * E.g: 157 * link deferdq: 1 2 3 4 10 11 13 14 15 20 158 * --> Gap ACK blocks: <4, 5>, <11, 1>, <15, 4>, <20, 0> 159 */ 160struct tipc_gap_ack { 161 __be16 ack; 162 __be16 gap; 163}; 164 165/* struct tipc_gap_ack_blks 166 * @len: actual length of the record 167 * @ugack_cnt: number of Gap ACK blocks for unicast (following the broadcast 168 * ones) 169 * @start_index: starting index for "valid" broadcast Gap ACK blocks 170 * @bgack_cnt: number of Gap ACK blocks for broadcast in the record 171 * @gacks: array of Gap ACK blocks 172 * 173 * 31 16 15 0 174 * +-------------+-------------+-------------+-------------+ 175 * | bgack_cnt | ugack_cnt | len | 176 * +-------------+-------------+-------------+-------------+ - 177 * | gap | ack | | 178 * +-------------+-------------+-------------+-------------+ > bc gacks 179 * : : : | 180 * +-------------+-------------+-------------+-------------+ - 181 * | gap | ack | | 182 * +-------------+-------------+-------------+-------------+ > uc gacks 183 * : : : | 184 * +-------------+-------------+-------------+-------------+ - 185 */ 186struct tipc_gap_ack_blks { 187 __be16 len; 188 union { 189 u8 ugack_cnt; 190 u8 start_index; 191 }; 192 u8 bgack_cnt; 193 struct tipc_gap_ack gacks[]; 194}; 195 196#define MAX_GAP_ACK_BLKS 128 197#define MAX_GAP_ACK_BLKS_SZ (sizeof(struct tipc_gap_ack_blks) + \ 198 sizeof(struct tipc_gap_ack) * MAX_GAP_ACK_BLKS) 199 200static inline struct tipc_msg *buf_msg(struct sk_buff *skb) 201{ 202 return (struct tipc_msg *)skb->data; 203} 204 205static inline u32 msg_word(struct tipc_msg *m, u32 pos) 206{ 207 return ntohl(m->hdr[pos]); 208} 209 210static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val) 211{ 212 m->hdr[w] = htonl(val); 213} 214 215static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask) 216{ 217 return (msg_word(m, w) >> pos) & mask; 218} 219 220static inline void msg_set_bits(struct tipc_msg *m, u32 w, 221 u32 pos, u32 mask, u32 val) 222{ 223 val = (val & mask) << pos; 224 mask = mask << pos; 225 m->hdr[w] &= ~htonl(mask); 226 m->hdr[w] |= htonl(val); 227} 228 229/* 230 * Word 0 231 */ 232static inline u32 msg_version(struct tipc_msg *m) 233{ 234 return msg_bits(m, 0, 29, 7); 235} 236 237static inline void msg_set_version(struct tipc_msg *m) 238{ 239 msg_set_bits(m, 0, 29, 7, TIPC_VERSION); 240} 241 242static inline u32 msg_user(struct tipc_msg *m) 243{ 244 return msg_bits(m, 0, 25, 0xf); 245} 246 247static inline u32 msg_isdata(struct tipc_msg *m) 248{ 249 return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE; 250} 251 252static inline void msg_set_user(struct tipc_msg *m, u32 n) 253{ 254 msg_set_bits(m, 0, 25, 0xf, n); 255} 256 257static inline u32 msg_hdr_sz(struct tipc_msg *m) 258{ 259 return msg_bits(m, 0, 21, 0xf) << 2; 260} 261 262static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n) 263{ 264 msg_set_bits(m, 0, 21, 0xf, n>>2); 265} 266 267static inline u32 msg_size(struct tipc_msg *m) 268{ 269 return msg_bits(m, 0, 0, 0x1ffff); 270} 271 272static inline u32 msg_blocks(struct tipc_msg *m) 273{ 274 return (msg_size(m) / 1024) + 1; 275} 276 277static inline u32 msg_data_sz(struct tipc_msg *m) 278{ 279 return msg_size(m) - msg_hdr_sz(m); 280} 281 282static inline int msg_non_seq(struct tipc_msg *m) 283{ 284 return msg_bits(m, 0, 20, 1); 285} 286 287static inline void msg_set_non_seq(struct tipc_msg *m, u32 n) 288{ 289 msg_set_bits(m, 0, 20, 1, n); 290} 291 292static inline int msg_is_syn(struct tipc_msg *m) 293{ 294 return msg_bits(m, 0, 17, 1); 295} 296 297static inline void msg_set_syn(struct tipc_msg *m, u32 d) 298{ 299 msg_set_bits(m, 0, 17, 1, d); 300} 301 302static inline int msg_dest_droppable(struct tipc_msg *m) 303{ 304 return msg_bits(m, 0, 19, 1); 305} 306 307static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d) 308{ 309 msg_set_bits(m, 0, 19, 1, d); 310} 311 312static inline int msg_is_keepalive(struct tipc_msg *m) 313{ 314 return msg_bits(m, 0, 19, 1); 315} 316 317static inline void msg_set_is_keepalive(struct tipc_msg *m, u32 d) 318{ 319 msg_set_bits(m, 0, 19, 1, d); 320} 321 322static inline int msg_src_droppable(struct tipc_msg *m) 323{ 324 return msg_bits(m, 0, 18, 1); 325} 326 327static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d) 328{ 329 msg_set_bits(m, 0, 18, 1, d); 330} 331 332static inline int msg_ack_required(struct tipc_msg *m) 333{ 334 return msg_bits(m, 0, 18, 1); 335} 336 337static inline void msg_set_ack_required(struct tipc_msg *m) 338{ 339 msg_set_bits(m, 0, 18, 1, 1); 340} 341 342static inline int msg_nagle_ack(struct tipc_msg *m) 343{ 344 return msg_bits(m, 0, 18, 1); 345} 346 347static inline void msg_set_nagle_ack(struct tipc_msg *m) 348{ 349 msg_set_bits(m, 0, 18, 1, 1); 350} 351 352static inline bool msg_is_rcast(struct tipc_msg *m) 353{ 354 return msg_bits(m, 0, 18, 0x1); 355} 356 357static inline void msg_set_is_rcast(struct tipc_msg *m, bool d) 358{ 359 msg_set_bits(m, 0, 18, 0x1, d); 360} 361 362static inline void msg_set_size(struct tipc_msg *m, u32 sz) 363{ 364 m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz); 365} 366 367static inline unchar *msg_data(struct tipc_msg *m) 368{ 369 return ((unchar *)m) + msg_hdr_sz(m); 370} 371 372static inline struct tipc_msg *msg_inner_hdr(struct tipc_msg *m) 373{ 374 return (struct tipc_msg *)msg_data(m); 375} 376 377/* 378 * Word 1 379 */ 380static inline u32 msg_type(struct tipc_msg *m) 381{ 382 return msg_bits(m, 1, 29, 0x7); 383} 384 385static inline void msg_set_type(struct tipc_msg *m, u32 n) 386{ 387 msg_set_bits(m, 1, 29, 0x7, n); 388} 389 390static inline int msg_in_group(struct tipc_msg *m) 391{ 392 int mtyp = msg_type(m); 393 394 return mtyp >= TIPC_GRP_MEMBER_EVT && mtyp <= TIPC_GRP_UCAST_MSG; 395} 396 397static inline bool msg_is_grp_evt(struct tipc_msg *m) 398{ 399 return msg_type(m) == TIPC_GRP_MEMBER_EVT; 400} 401 402static inline u32 msg_named(struct tipc_msg *m) 403{ 404 return msg_type(m) == TIPC_NAMED_MSG; 405} 406 407static inline u32 msg_mcast(struct tipc_msg *m) 408{ 409 int mtyp = msg_type(m); 410 411 return ((mtyp == TIPC_MCAST_MSG) || (mtyp == TIPC_GRP_BCAST_MSG) || 412 (mtyp == TIPC_GRP_MCAST_MSG)); 413} 414 415static inline u32 msg_connected(struct tipc_msg *m) 416{ 417 return msg_type(m) == TIPC_CONN_MSG; 418} 419 420static inline u32 msg_direct(struct tipc_msg *m) 421{ 422 return msg_type(m) == TIPC_DIRECT_MSG; 423} 424 425static inline u32 msg_errcode(struct tipc_msg *m) 426{ 427 return msg_bits(m, 1, 25, 0xf); 428} 429 430static inline void msg_set_errcode(struct tipc_msg *m, u32 err) 431{ 432 msg_set_bits(m, 1, 25, 0xf, err); 433} 434 435static inline void msg_set_bulk(struct tipc_msg *m) 436{ 437 msg_set_bits(m, 1, 28, 0x1, 1); 438} 439 440static inline u32 msg_is_bulk(struct tipc_msg *m) 441{ 442 return msg_bits(m, 1, 28, 0x1); 443} 444 445static inline void msg_set_last_bulk(struct tipc_msg *m) 446{ 447 msg_set_bits(m, 1, 27, 0x1, 1); 448} 449 450static inline u32 msg_is_last_bulk(struct tipc_msg *m) 451{ 452 return msg_bits(m, 1, 27, 0x1); 453} 454 455static inline void msg_set_non_legacy(struct tipc_msg *m) 456{ 457 msg_set_bits(m, 1, 26, 0x1, 1); 458} 459 460static inline u32 msg_is_legacy(struct tipc_msg *m) 461{ 462 return !msg_bits(m, 1, 26, 0x1); 463} 464 465static inline u32 msg_reroute_cnt(struct tipc_msg *m) 466{ 467 return msg_bits(m, 1, 21, 0xf); 468} 469 470static inline void msg_incr_reroute_cnt(struct tipc_msg *m) 471{ 472 msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1); 473} 474 475static inline u32 msg_lookup_scope(struct tipc_msg *m) 476{ 477 return msg_bits(m, 1, 19, 0x3); 478} 479 480static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n) 481{ 482 msg_set_bits(m, 1, 19, 0x3, n); 483} 484 485static inline u16 msg_bcast_ack(struct tipc_msg *m) 486{ 487 return msg_bits(m, 1, 0, 0xffff); 488} 489 490static inline void msg_set_bcast_ack(struct tipc_msg *m, u16 n) 491{ 492 msg_set_bits(m, 1, 0, 0xffff, n); 493} 494 495/* Note: reusing bits in word 1 for ACTIVATE_MSG only, to re-synch 496 * link peer session number 497 */ 498static inline bool msg_dest_session_valid(struct tipc_msg *m) 499{ 500 return msg_bits(m, 1, 16, 0x1); 501} 502 503static inline void msg_set_dest_session_valid(struct tipc_msg *m, bool valid) 504{ 505 msg_set_bits(m, 1, 16, 0x1, valid); 506} 507 508static inline u16 msg_dest_session(struct tipc_msg *m) 509{ 510 return msg_bits(m, 1, 0, 0xffff); 511} 512 513static inline void msg_set_dest_session(struct tipc_msg *m, u16 n) 514{ 515 msg_set_bits(m, 1, 0, 0xffff, n); 516} 517 518/* 519 * Word 2 520 */ 521static inline u16 msg_ack(struct tipc_msg *m) 522{ 523 return msg_bits(m, 2, 16, 0xffff); 524} 525 526static inline void msg_set_ack(struct tipc_msg *m, u16 n) 527{ 528 msg_set_bits(m, 2, 16, 0xffff, n); 529} 530 531static inline u16 msg_seqno(struct tipc_msg *m) 532{ 533 return msg_bits(m, 2, 0, 0xffff); 534} 535 536static inline void msg_set_seqno(struct tipc_msg *m, u16 n) 537{ 538 msg_set_bits(m, 2, 0, 0xffff, n); 539} 540 541/* 542 * Words 3-10 543 */ 544static inline u32 msg_importance(struct tipc_msg *m) 545{ 546 int usr = msg_user(m); 547 548 if (likely((usr <= TIPC_CRITICAL_IMPORTANCE) && !msg_errcode(m))) 549 return usr; 550 if ((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER)) 551 return msg_bits(m, 9, 0, 0x7); 552 return TIPC_SYSTEM_IMPORTANCE; 553} 554 555static inline void msg_set_importance(struct tipc_msg *m, u32 i) 556{ 557 int usr = msg_user(m); 558 559 if (likely((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER))) 560 msg_set_bits(m, 9, 0, 0x7, i); 561 else if (i < TIPC_SYSTEM_IMPORTANCE) 562 msg_set_user(m, i); 563 else 564 pr_warn("Trying to set illegal importance in message\n"); 565} 566 567static inline u32 msg_prevnode(struct tipc_msg *m) 568{ 569 return msg_word(m, 3); 570} 571 572static inline void msg_set_prevnode(struct tipc_msg *m, u32 a) 573{ 574 msg_set_word(m, 3, a); 575} 576 577static inline u32 msg_origport(struct tipc_msg *m) 578{ 579 if (msg_user(m) == MSG_FRAGMENTER) 580 m = msg_inner_hdr(m); 581 return msg_word(m, 4); 582} 583 584static inline void msg_set_origport(struct tipc_msg *m, u32 p) 585{ 586 msg_set_word(m, 4, p); 587} 588 589static inline u16 msg_named_seqno(struct tipc_msg *m) 590{ 591 return msg_bits(m, 4, 0, 0xffff); 592} 593 594static inline void msg_set_named_seqno(struct tipc_msg *m, u16 n) 595{ 596 msg_set_bits(m, 4, 0, 0xffff, n); 597} 598 599static inline u32 msg_destport(struct tipc_msg *m) 600{ 601 return msg_word(m, 5); 602} 603 604static inline void msg_set_destport(struct tipc_msg *m, u32 p) 605{ 606 msg_set_word(m, 5, p); 607} 608 609static inline u32 msg_mc_netid(struct tipc_msg *m) 610{ 611 return msg_word(m, 5); 612} 613 614static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p) 615{ 616 msg_set_word(m, 5, p); 617} 618 619static inline int msg_short(struct tipc_msg *m) 620{ 621 return msg_hdr_sz(m) == SHORT_H_SIZE; 622} 623 624static inline u32 msg_orignode(struct tipc_msg *m) 625{ 626 if (likely(msg_short(m))) 627 return msg_prevnode(m); 628 return msg_word(m, 6); 629} 630 631static inline void msg_set_orignode(struct tipc_msg *m, u32 a) 632{ 633 msg_set_word(m, 6, a); 634} 635 636static inline u32 msg_destnode(struct tipc_msg *m) 637{ 638 return msg_word(m, 7); 639} 640 641static inline void msg_set_destnode(struct tipc_msg *m, u32 a) 642{ 643 msg_set_word(m, 7, a); 644} 645 646static inline u32 msg_nametype(struct tipc_msg *m) 647{ 648 return msg_word(m, 8); 649} 650 651static inline void msg_set_nametype(struct tipc_msg *m, u32 n) 652{ 653 msg_set_word(m, 8, n); 654} 655 656static inline u32 msg_nameinst(struct tipc_msg *m) 657{ 658 return msg_word(m, 9); 659} 660 661static inline u32 msg_namelower(struct tipc_msg *m) 662{ 663 return msg_nameinst(m); 664} 665 666static inline void msg_set_namelower(struct tipc_msg *m, u32 n) 667{ 668 msg_set_word(m, 9, n); 669} 670 671static inline void msg_set_nameinst(struct tipc_msg *m, u32 n) 672{ 673 msg_set_namelower(m, n); 674} 675 676static inline u32 msg_nameupper(struct tipc_msg *m) 677{ 678 return msg_word(m, 10); 679} 680 681static inline void msg_set_nameupper(struct tipc_msg *m, u32 n) 682{ 683 msg_set_word(m, 10, n); 684} 685 686/* 687 * Constants and routines used to read and write TIPC internal message headers 688 */ 689 690/* 691 * Connection management protocol message types 692 */ 693#define CONN_PROBE 0 694#define CONN_PROBE_REPLY 1 695#define CONN_ACK 2 696 697/* 698 * Name distributor message types 699 */ 700#define PUBLICATION 0 701#define WITHDRAWAL 1 702 703/* 704 * Segmentation message types 705 */ 706#define FIRST_FRAGMENT 0 707#define FRAGMENT 1 708#define LAST_FRAGMENT 2 709 710/* 711 * Link management protocol message types 712 */ 713#define STATE_MSG 0 714#define RESET_MSG 1 715#define ACTIVATE_MSG 2 716 717/* 718 * Changeover tunnel message types 719 */ 720#define SYNCH_MSG 0 721#define FAILOVER_MSG 1 722 723/* 724 * Config protocol message types 725 */ 726#define DSC_REQ_MSG 0 727#define DSC_RESP_MSG 1 728#define DSC_TRIAL_MSG 2 729#define DSC_TRIAL_FAIL_MSG 3 730 731/* 732 * Group protocol message types 733 */ 734#define GRP_JOIN_MSG 0 735#define GRP_LEAVE_MSG 1 736#define GRP_ADV_MSG 2 737#define GRP_ACK_MSG 3 738#define GRP_RECLAIM_MSG 4 739#define GRP_REMIT_MSG 5 740 741/* Crypto message types */ 742#define KEY_DISTR_MSG 0 743 744/* 745 * Word 1 746 */ 747static inline u32 msg_seq_gap(struct tipc_msg *m) 748{ 749 return msg_bits(m, 1, 16, 0x1fff); 750} 751 752static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n) 753{ 754 msg_set_bits(m, 1, 16, 0x1fff, n); 755} 756 757static inline u32 msg_node_sig(struct tipc_msg *m) 758{ 759 return msg_bits(m, 1, 0, 0xffff); 760} 761 762static inline void msg_set_node_sig(struct tipc_msg *m, u32 n) 763{ 764 msg_set_bits(m, 1, 0, 0xffff, n); 765} 766 767static inline u32 msg_node_capabilities(struct tipc_msg *m) 768{ 769 return msg_bits(m, 1, 15, 0x1fff); 770} 771 772static inline void msg_set_node_capabilities(struct tipc_msg *m, u32 n) 773{ 774 msg_set_bits(m, 1, 15, 0x1fff, n); 775} 776 777/* 778 * Word 2 779 */ 780static inline u32 msg_dest_domain(struct tipc_msg *m) 781{ 782 return msg_word(m, 2); 783} 784 785static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n) 786{ 787 msg_set_word(m, 2, n); 788} 789 790static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n) 791{ 792 msg_set_bits(m, 2, 16, 0xffff, n); 793} 794 795static inline u32 msg_bcgap_to(struct tipc_msg *m) 796{ 797 return msg_bits(m, 2, 0, 0xffff); 798} 799 800static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n) 801{ 802 msg_set_bits(m, 2, 0, 0xffff, n); 803} 804 805/* 806 * Word 4 807 */ 808static inline u32 msg_last_bcast(struct tipc_msg *m) 809{ 810 return msg_bits(m, 4, 16, 0xffff); 811} 812 813static inline u32 msg_bc_snd_nxt(struct tipc_msg *m) 814{ 815 return msg_last_bcast(m) + 1; 816} 817 818static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n) 819{ 820 msg_set_bits(m, 4, 16, 0xffff, n); 821} 822 823static inline u32 msg_nof_fragms(struct tipc_msg *m) 824{ 825 return msg_bits(m, 4, 0, 0xffff); 826} 827 828static inline void msg_set_nof_fragms(struct tipc_msg *m, u32 n) 829{ 830 msg_set_bits(m, 4, 0, 0xffff, n); 831} 832 833static inline u32 msg_fragm_no(struct tipc_msg *m) 834{ 835 return msg_bits(m, 4, 16, 0xffff); 836} 837 838static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n) 839{ 840 msg_set_bits(m, 4, 16, 0xffff, n); 841} 842 843static inline u16 msg_next_sent(struct tipc_msg *m) 844{ 845 return msg_bits(m, 4, 0, 0xffff); 846} 847 848static inline void msg_set_next_sent(struct tipc_msg *m, u16 n) 849{ 850 msg_set_bits(m, 4, 0, 0xffff, n); 851} 852 853static inline u32 msg_bc_netid(struct tipc_msg *m) 854{ 855 return msg_word(m, 4); 856} 857 858static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id) 859{ 860 msg_set_word(m, 4, id); 861} 862 863static inline u32 msg_link_selector(struct tipc_msg *m) 864{ 865 if (msg_user(m) == MSG_FRAGMENTER) 866 m = (void *)msg_data(m); 867 return msg_bits(m, 4, 0, 1); 868} 869 870/* 871 * Word 5 872 */ 873static inline u16 msg_session(struct tipc_msg *m) 874{ 875 return msg_bits(m, 5, 16, 0xffff); 876} 877 878static inline void msg_set_session(struct tipc_msg *m, u16 n) 879{ 880 msg_set_bits(m, 5, 16, 0xffff, n); 881} 882 883static inline u32 msg_probe(struct tipc_msg *m) 884{ 885 return msg_bits(m, 5, 0, 1); 886} 887 888static inline void msg_set_probe(struct tipc_msg *m, u32 val) 889{ 890 msg_set_bits(m, 5, 0, 1, val); 891} 892 893static inline char msg_net_plane(struct tipc_msg *m) 894{ 895 return msg_bits(m, 5, 1, 7) + 'A'; 896} 897 898static inline void msg_set_net_plane(struct tipc_msg *m, char n) 899{ 900 msg_set_bits(m, 5, 1, 7, (n - 'A')); 901} 902 903static inline u32 msg_linkprio(struct tipc_msg *m) 904{ 905 return msg_bits(m, 5, 4, 0x1f); 906} 907 908static inline void msg_set_linkprio(struct tipc_msg *m, u32 n) 909{ 910 msg_set_bits(m, 5, 4, 0x1f, n); 911} 912 913static inline u32 msg_bearer_id(struct tipc_msg *m) 914{ 915 return msg_bits(m, 5, 9, 0x7); 916} 917 918static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n) 919{ 920 msg_set_bits(m, 5, 9, 0x7, n); 921} 922 923static inline u32 msg_redundant_link(struct tipc_msg *m) 924{ 925 return msg_bits(m, 5, 12, 0x1); 926} 927 928static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r) 929{ 930 msg_set_bits(m, 5, 12, 0x1, r); 931} 932 933static inline u32 msg_peer_stopping(struct tipc_msg *m) 934{ 935 return msg_bits(m, 5, 13, 0x1); 936} 937 938static inline void msg_set_peer_stopping(struct tipc_msg *m, u32 s) 939{ 940 msg_set_bits(m, 5, 13, 0x1, s); 941} 942 943static inline bool msg_bc_ack_invalid(struct tipc_msg *m) 944{ 945 switch (msg_user(m)) { 946 case BCAST_PROTOCOL: 947 case NAME_DISTRIBUTOR: 948 case LINK_PROTOCOL: 949 return msg_bits(m, 5, 14, 0x1); 950 default: 951 return false; 952 } 953} 954 955static inline void msg_set_bc_ack_invalid(struct tipc_msg *m, bool invalid) 956{ 957 msg_set_bits(m, 5, 14, 0x1, invalid); 958} 959 960static inline char *msg_media_addr(struct tipc_msg *m) 961{ 962 return (char *)&m->hdr[TIPC_MEDIA_INFO_OFFSET]; 963} 964 965static inline u32 msg_bc_gap(struct tipc_msg *m) 966{ 967 return msg_bits(m, 8, 0, 0x3ff); 968} 969 970static inline void msg_set_bc_gap(struct tipc_msg *m, u32 n) 971{ 972 msg_set_bits(m, 8, 0, 0x3ff, n); 973} 974 975/* 976 * Word 9 977 */ 978static inline u16 msg_msgcnt(struct tipc_msg *m) 979{ 980 return msg_bits(m, 9, 16, 0xffff); 981} 982 983static inline void msg_set_msgcnt(struct tipc_msg *m, u16 n) 984{ 985 msg_set_bits(m, 9, 16, 0xffff, n); 986} 987 988static inline u16 msg_syncpt(struct tipc_msg *m) 989{ 990 return msg_bits(m, 9, 16, 0xffff); 991} 992 993static inline void msg_set_syncpt(struct tipc_msg *m, u16 n) 994{ 995 msg_set_bits(m, 9, 16, 0xffff, n); 996} 997 998static inline u32 msg_conn_ack(struct tipc_msg *m) 999{ 1000 return msg_bits(m, 9, 16, 0xffff); 1001} 1002 1003static inline void msg_set_conn_ack(struct tipc_msg *m, u32 n) 1004{ 1005 msg_set_bits(m, 9, 16, 0xffff, n); 1006} 1007 1008static inline u16 msg_adv_win(struct tipc_msg *m) 1009{ 1010 return msg_bits(m, 9, 0, 0xffff); 1011} 1012 1013static inline void msg_set_adv_win(struct tipc_msg *m, u16 n) 1014{ 1015 msg_set_bits(m, 9, 0, 0xffff, n); 1016} 1017 1018static inline u32 msg_max_pkt(struct tipc_msg *m) 1019{ 1020 return msg_bits(m, 9, 16, 0xffff) * 4; 1021} 1022 1023static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n) 1024{ 1025 msg_set_bits(m, 9, 16, 0xffff, (n / 4)); 1026} 1027 1028static inline u32 msg_link_tolerance(struct tipc_msg *m) 1029{ 1030 return msg_bits(m, 9, 0, 0xffff); 1031} 1032 1033static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n) 1034{ 1035 msg_set_bits(m, 9, 0, 0xffff, n); 1036} 1037 1038static inline u16 msg_grp_bc_syncpt(struct tipc_msg *m) 1039{ 1040 return msg_bits(m, 9, 16, 0xffff); 1041} 1042 1043static inline void msg_set_grp_bc_syncpt(struct tipc_msg *m, u16 n) 1044{ 1045 msg_set_bits(m, 9, 16, 0xffff, n); 1046} 1047 1048static inline u16 msg_grp_bc_acked(struct tipc_msg *m) 1049{ 1050 return msg_bits(m, 9, 16, 0xffff); 1051} 1052 1053static inline void msg_set_grp_bc_acked(struct tipc_msg *m, u16 n) 1054{ 1055 msg_set_bits(m, 9, 16, 0xffff, n); 1056} 1057 1058static inline u16 msg_grp_remitted(struct tipc_msg *m) 1059{ 1060 return msg_bits(m, 9, 16, 0xffff); 1061} 1062 1063static inline void msg_set_grp_remitted(struct tipc_msg *m, u16 n) 1064{ 1065 msg_set_bits(m, 9, 16, 0xffff, n); 1066} 1067 1068/* Word 10 1069 */ 1070static inline u16 msg_grp_evt(struct tipc_msg *m) 1071{ 1072 return msg_bits(m, 10, 0, 0x3); 1073} 1074 1075static inline void msg_set_grp_evt(struct tipc_msg *m, int n) 1076{ 1077 msg_set_bits(m, 10, 0, 0x3, n); 1078} 1079 1080static inline u16 msg_grp_bc_ack_req(struct tipc_msg *m) 1081{ 1082 return msg_bits(m, 10, 0, 0x1); 1083} 1084 1085static inline void msg_set_grp_bc_ack_req(struct tipc_msg *m, bool n) 1086{ 1087 msg_set_bits(m, 10, 0, 0x1, n); 1088} 1089 1090static inline u16 msg_grp_bc_seqno(struct tipc_msg *m) 1091{ 1092 return msg_bits(m, 10, 16, 0xffff); 1093} 1094 1095static inline void msg_set_grp_bc_seqno(struct tipc_msg *m, u32 n) 1096{ 1097 msg_set_bits(m, 10, 16, 0xffff, n); 1098} 1099 1100static inline bool msg_peer_link_is_up(struct tipc_msg *m) 1101{ 1102 if (likely(msg_user(m) != LINK_PROTOCOL)) 1103 return true; 1104 if (msg_type(m) == STATE_MSG) 1105 return true; 1106 return false; 1107} 1108 1109static inline bool msg_peer_node_is_up(struct tipc_msg *m) 1110{ 1111 if (msg_peer_link_is_up(m)) 1112 return true; 1113 return msg_redundant_link(m); 1114} 1115 1116static inline bool msg_is_reset(struct tipc_msg *hdr) 1117{ 1118 return (msg_user(hdr) == LINK_PROTOCOL) && (msg_type(hdr) == RESET_MSG); 1119} 1120 1121/* Word 13 1122 */ 1123static inline void msg_set_peer_net_hash(struct tipc_msg *m, u32 n) 1124{ 1125 msg_set_word(m, 13, n); 1126} 1127 1128static inline u32 msg_peer_net_hash(struct tipc_msg *m) 1129{ 1130 return msg_word(m, 13); 1131} 1132 1133/* Word 14 1134 */ 1135static inline u32 msg_sugg_node_addr(struct tipc_msg *m) 1136{ 1137 return msg_word(m, 14); 1138} 1139 1140static inline void msg_set_sugg_node_addr(struct tipc_msg *m, u32 n) 1141{ 1142 msg_set_word(m, 14, n); 1143} 1144 1145static inline void msg_set_node_id(struct tipc_msg *hdr, u8 *id) 1146{ 1147 memcpy(msg_data(hdr), id, 16); 1148} 1149 1150static inline u8 *msg_node_id(struct tipc_msg *hdr) 1151{ 1152 return (u8 *)msg_data(hdr); 1153} 1154 1155struct sk_buff *tipc_buf_acquire(u32 size, gfp_t gfp); 1156bool tipc_msg_validate(struct sk_buff **_skb); 1157bool tipc_msg_reverse(u32 own_addr, struct sk_buff **skb, int err); 1158void tipc_skb_reject(struct net *net, int err, struct sk_buff *skb, 1159 struct sk_buff_head *xmitq); 1160void tipc_msg_init(u32 own_addr, struct tipc_msg *m, u32 user, u32 type, 1161 u32 hsize, u32 destnode); 1162struct sk_buff *tipc_msg_create(uint user, uint type, uint hdr_sz, 1163 uint data_sz, u32 dnode, u32 onode, 1164 u32 dport, u32 oport, int errcode); 1165int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf); 1166bool tipc_msg_try_bundle(struct sk_buff *tskb, struct sk_buff **skb, u32 mss, 1167 u32 dnode, bool *new_bundle); 1168bool tipc_msg_extract(struct sk_buff *skb, struct sk_buff **iskb, int *pos); 1169int tipc_msg_fragment(struct sk_buff *skb, const struct tipc_msg *hdr, 1170 int pktmax, struct sk_buff_head *frags); 1171int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m, 1172 int offset, int dsz, int mtu, struct sk_buff_head *list); 1173int tipc_msg_append(struct tipc_msg *hdr, struct msghdr *m, int dlen, 1174 int mss, struct sk_buff_head *txq); 1175bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, int *err); 1176bool tipc_msg_assemble(struct sk_buff_head *list); 1177bool tipc_msg_reassemble(struct sk_buff_head *list, struct sk_buff_head *rcvq); 1178bool tipc_msg_pskb_copy(u32 dst, struct sk_buff_head *msg, 1179 struct sk_buff_head *cpy); 1180bool __tipc_skb_queue_sorted(struct sk_buff_head *list, u16 seqno, 1181 struct sk_buff *skb); 1182bool tipc_msg_skb_clone(struct sk_buff_head *msg, struct sk_buff_head *cpy); 1183 1184static inline u16 buf_seqno(struct sk_buff *skb) 1185{ 1186 return msg_seqno(buf_msg(skb)); 1187} 1188 1189static inline int buf_roundup_len(struct sk_buff *skb) 1190{ 1191 return (skb->len / 1024 + 1) * 1024; 1192} 1193 1194/* tipc_skb_peek(): peek and reserve first buffer in list 1195 * @list: list to be peeked in 1196 * Returns pointer to first buffer in list, if any 1197 */ 1198static inline struct sk_buff *tipc_skb_peek(struct sk_buff_head *list, 1199 spinlock_t *lock) 1200{ 1201 struct sk_buff *skb; 1202 1203 spin_lock_bh(lock); 1204 skb = skb_peek(list); 1205 if (skb) 1206 skb_get(skb); 1207 spin_unlock_bh(lock); 1208 return skb; 1209} 1210 1211/* tipc_skb_peek_port(): find a destination port, ignoring all destinations 1212 * up to and including 'filter'. 1213 * Note: ignoring previously tried destinations minimizes the risk of 1214 * contention on the socket lock 1215 * @list: list to be peeked in 1216 * @filter: last destination to be ignored from search 1217 * Returns a destination port number, of applicable. 1218 */ 1219static inline u32 tipc_skb_peek_port(struct sk_buff_head *list, u32 filter) 1220{ 1221 struct sk_buff *skb; 1222 u32 dport = 0; 1223 bool ignore = true; 1224 1225 spin_lock_bh(&list->lock); 1226 skb_queue_walk(list, skb) { 1227 dport = msg_destport(buf_msg(skb)); 1228 if (!filter || skb_queue_is_last(list, skb)) 1229 break; 1230 if (dport == filter) 1231 ignore = false; 1232 else if (!ignore) 1233 break; 1234 } 1235 spin_unlock_bh(&list->lock); 1236 return dport; 1237} 1238 1239/* tipc_skb_dequeue(): unlink first buffer with dest 'dport' from list 1240 * @list: list to be unlinked from 1241 * @dport: selection criteria for buffer to unlink 1242 */ 1243static inline struct sk_buff *tipc_skb_dequeue(struct sk_buff_head *list, 1244 u32 dport) 1245{ 1246 struct sk_buff *_skb, *tmp, *skb = NULL; 1247 1248 spin_lock_bh(&list->lock); 1249 skb_queue_walk_safe(list, _skb, tmp) { 1250 if (msg_destport(buf_msg(_skb)) == dport) { 1251 __skb_unlink(_skb, list); 1252 skb = _skb; 1253 break; 1254 } 1255 } 1256 spin_unlock_bh(&list->lock); 1257 return skb; 1258} 1259 1260/* tipc_skb_queue_splice_tail - append an skb list to lock protected list 1261 * @list: the new list to append. Not lock protected 1262 * @head: target list. Lock protected. 1263 */ 1264static inline void tipc_skb_queue_splice_tail(struct sk_buff_head *list, 1265 struct sk_buff_head *head) 1266{ 1267 spin_lock_bh(&head->lock); 1268 skb_queue_splice_tail(list, head); 1269 spin_unlock_bh(&head->lock); 1270} 1271 1272/* tipc_skb_queue_splice_tail_init - merge two lock protected skb lists 1273 * @list: the new list to add. Lock protected. Will be reinitialized 1274 * @head: target list. Lock protected. 1275 */ 1276static inline void tipc_skb_queue_splice_tail_init(struct sk_buff_head *list, 1277 struct sk_buff_head *head) 1278{ 1279 struct sk_buff_head tmp; 1280 1281 __skb_queue_head_init(&tmp); 1282 1283 spin_lock_bh(&list->lock); 1284 skb_queue_splice_tail_init(list, &tmp); 1285 spin_unlock_bh(&list->lock); 1286 tipc_skb_queue_splice_tail(&tmp, head); 1287} 1288 1289/* __tipc_skb_dequeue() - dequeue the head skb according to expected seqno 1290 * @list: list to be dequeued from 1291 * @seqno: seqno of the expected msg 1292 * 1293 * returns skb dequeued from the list if its seqno is less than or equal to 1294 * the expected one, otherwise the skb is still hold 1295 * 1296 * Note: must be used with appropriate locks held only 1297 */ 1298static inline struct sk_buff *__tipc_skb_dequeue(struct sk_buff_head *list, 1299 u16 seqno) 1300{ 1301 struct sk_buff *skb = skb_peek(list); 1302 1303 if (skb && less_eq(buf_seqno(skb), seqno)) { 1304 __skb_unlink(skb, list); 1305 return skb; 1306 } 1307 return NULL; 1308} 1309 1310#endif 1311