sys/dev/disk/iscsi/initiator/iscsi.h

   1 /*-
   2  * Copyright (c) 2005-2008 Daniel Braniss <danny@cs.huji.ac.il>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/sys/dev/iscsi/initiator/iscsi.h,v 1.2 2008/11/25 07:17:11 scottl Exp $
  27  */
  28 /*
  29  | $Id: iscsi.h,v 1.17 2006/12/01 09:10:17 danny Exp danny $
  30  */
  31 #ifndef _KERNEL
  32 #include <stdbool.h>
  33 #else
  34 #include <sys/stdint.h>
  35 #endif
  36
  37 #include <sys/objcache.h>
  38 #include <bus/cam/cam.h>
  39 #include <sys/device.h>
  40
  41 #define ISCSIDEV        "iscsi"
  42
  43 #define ISCSI_MAX_TARGETS       4 //64
  44
  45 #define ISCSI_MAX_LUNS          4
  46
  47 /*
  48  | iSCSI commands
  49  */
  50
  51 /*
  52  | Initiator Opcodes:
  53  */
  54 #define ISCSI_NOP_OUT           0x00
  55 #define ISCSI_SCSI_CMD          0x01
  56 #define ISCSI_TASK_CMD          0x02
  57 #define ISCSI_LOGIN_CMD         0x03
  58 #define ISCSI_TEXT_CMD          0x04
  59 #define ISCSI_WRITE_DATA        0x05
  60 #define ISCSI_LOGOUT_CMD        0x06
  61 #define ISCSI_SNACK             0x10
  62 /*
  63  | Target Opcodes:
  64  */
  65 #define ISCSI_NOP_IN            0x20
  66 #define ISCSI_SCSI_RSP          0x21
  67 #define ISCSI_TASK_RSP          0x22
  68 #define ISCSI_LOGIN_RSP         0x23
  69 #define ISCSI_TEXT_RSP          0x24
  70 #define ISCSI_READ_DATA         0x25
  71 #define ISCSI_LOGOUT_RSP        0x26
  72 #define ISCSI_R2T               0x31
  73 #define ISCSI_ASYNC             0x32
  74 #define ISCSI_REJECT            0x3f
  75 /*
  76  | PDU stuff
  77  */
  78 /*
  79  | BHS Basic Header Segment
  80  */
  81 typedef struct bhs {
  82      // the order is network byte order!
  83      u_char     opcode:6;
  84      u_char     I:1;
  85      u_char     _:1;
  86      u_char     __:7;
  87      u_char     F:1;                    // Final bit
  88      u_char     ___[2];
  89
  90      u_int      AHSLength:8;            // in 4byte words
  91      u_int      DSLength:24;            // in bytes
  92
  93      u_int      LUN[2];                 // or Opcode-specific fields
  94      u_int      itt;
  95      u_int      OpcodeSpecificFields[7];
  96 #define CmdSN           OpcodeSpecificFields[1]
  97 #define ExpStSN         OpcodeSpecificFields[2]
  98 #define MaxCmdSN        OpcodeSpecificFields[3]
  99 } bhs_t;
 100
 101 typedef struct ahs {
 102      u_int      len:16;
 103      u_int      type:8;
 104      u_int      spec:8;
 105      char       data[0];
 106 } ahs_t;
 107
 108 typedef struct {
 109      // Sequence Numbers
 110      // (computers were invented to count, right?)
 111      int        cmd;
 112      int        expcmd;
 113      int        maxcmd;
 114 } req_sn_t;
 115
 116 typedef struct {
 117      // Sequence Numbers
 118      // (computers were invented to count, right?)
 119      int        stat;
 120      int        expcmd;
 121      int        maxcmd;
 122 } rsp_sn_t;
 123
 124 typedef struct scsi_req {
 125      u_char     opcode:6; // 0x01
 126      u_char     I:1;
 127      u_char     _:1;
 128
 129      u_char     attr:3;
 130      u_char     _0:2;
 131      u_char     W:1;
 132      u_char     R:1;
 133      u_char     F:1;
 134 #define         iSCSI_TASK_UNTAGGED     0
 135 #define         iSCSI_TASK_SIMPLE       1
 136 #define         iSCSI_TASK_ORDER        2
 137 #define         iSCSI_TASK_HOFQ         3
 138 #define         iSCSI_TASK_ACA          4
 139      char       _1[2];
 140      int        len;
 141      int        lun[2];
 142      int        itt;
 143      int        edtlen;         // expectect data transfere length
 144      int        cmdSN;
 145      int        extStatSN;
 146      int        cdb[4];
 147 } scsi_req_t;
 148
 149 typedef struct scsi_rsp {
 150      char       opcode; // 0x21
 151      u_char     flag;
 152      u_char     response;
 153      u_char     status;
 154
 155      int        len;
 156      int        _[2];
 157      int        itt;
 158      int        stag;
 159      rsp_sn_t   sn;
 160      int        expdatasn;
 161      int        bdrcnt; // bidirectional residual count
 162      int        rcnt;   // residual count
 163 } scsi_rsp_t;
 164
 165 typedef struct nop_out {
 166      // the order is network byte order!
 167      u_char     opcode:6;
 168      u_char     I:1;
 169      u_char     _:1;
 170      u_char     __:7;
 171      u_char     F:1;                    // Final bit
 172      u_char     ___[2];
 173
 174      u_int      len;
 175      u_int      lun[2];
 176      u_int      itt;
 177      u_int      ttt;
 178      req_sn_t   sn;
 179      u_int      mbz[3];
 180 } nop_out_t;
 181
 182 typedef struct nop_in {
 183      // the order is network byte order!
 184      u_char     opcode:6;
 185      u_char     I:1;
 186      u_char     _:1;
 187      u_char     __:7;
 188      u_char     F:1;                    // Final bit
 189      u_char     ___[2];
 190
 191      u_int      len;
 192      u_int      lun[2];
 193      u_int      itt;
 194      u_int      ttt;
 195      rsp_sn_t   sn;
 196      u_int      ____[2];
 197
 198 } nop_in_t;
 199
 200 typedef struct r2t {
 201      u_char     opcode:6;
 202      u_char     I:1;
 203      u_char     _:1;
 204      u_char     __:7;
 205      u_char     F:1;                    // Final bit
 206      u_char     ___[2];
 207
 208      u_int      len;
 209      u_int      lun[2];
 210      u_int      itt;
 211      u_int      ttt;
 212      rsp_sn_t   sn;
 213      u_int      r2tSN;
 214      u_int      bo;
 215      u_int      ddtl;
 216 } r2t_t;
 217
 218 typedef struct data_out {
 219      u_char     opcode:6;
 220      u_char     I:1;
 221      u_char     _:1;
 222      u_char     __:7;
 223      u_char     F:1;                    // Final bit
 224      u_char     ___[2];
 225
 226      u_int      len;
 227      u_int      lun[2];
 228      u_int      itt;
 229      u_int      ttt;
 230      rsp_sn_t   sn;
 231      u_int      dsn;    // data seq. number
 232      u_int      bo;
 233      u_int      ____;
 234 } data_out_t;
 235
 236 typedef struct data_in {
 237      u_char     opcode:6;
 238      u_char     I:1;
 239      u_char     _:1;
 240
 241      u_char     S:1;
 242      u_char     U:1;
 243      u_char     O:1;
 244      u_char     __:3;
 245      u_char     A:1;
 246      u_char     F:1;                    // Final bit
 247      u_char     ___[1];
 248      u_char     status;
 249
 250      u_int      len;
 251      u_int      lun[2];
 252      u_int      itt;
 253      u_int      ttt;
 254      rsp_sn_t   sn;
 255      u_int      dataSN;
 256      u_int      bo;
 257      u_int      ____;
 258 } data_in_t;
 259
 260 typedef struct reject {
 261      u_char     opcode:6;
 262      u_char     _:2;
 263      u_char     F:1;
 264      u_char     __:7;
 265      u_char     reason;
 266      u_char     ___;
 267
 268      u_int      len;
 269      u_int      ____[2];
 270      u_int      tt[2];  // must be -1
 271      rsp_sn_t   sn;
 272      u_int      dataSN; // or R2TSN or reserved
 273      u_int      _____[2];
 274 } reject_t;
 275
 276 typedef struct async {
 277      u_char     opcode:6;
 278      u_char     _:2;
 279      u_char     F:1;
 280      u_char     __:7;
 281      u_char     ___[2];
 282
 283      u_int      len;
 284      u_int      lun[2];
 285      u_int      itt;    // must be -1
 286      u_int      ____;
 287      rsp_sn_t   sn;
 288
 289      u_char     asyncEvent;
 290      u_char     asyncVCode;
 291      u_char     param1[2];
 292      u_char     param2[2];
 293      u_char     param3[2];
 294
 295      u_int      _____;
 296
 297 } async_t;
 298
 299 typedef struct login_req {
 300      char       cmd;    // 0x03
 301
 302      u_char     NSG:2;
 303      u_char     CSG:2;
 304      u_char     _:2;
 305      u_char     C:1;
 306      u_char     T:1;
 307
 308      char       v_max;
 309      char       v_min;
 310
 311      int        len;    // remapped via standard bhs
 312      char       isid[6];
 313      short      tsih;
 314      int        itt;    // Initiator Task Tag;
 315
 316      int        CID:16;
 317      int        rsv:16;
 318
 319      int        cmdSN;
 320      int        expStatSN;
 321      int        unused[4];
 322 } login_req_t;
 323
 324 typedef struct login_rsp {
 325      char       cmd;    // 0x23
 326      u_char     NSG:2;
 327      u_char     CSG:2;
 328      u_char     _1:2;
 329      u_char     C:1;
 330      u_char     T:1;
 331
 332      char       v_max;
 333      char       v_act;
 334
 335      int        len;    // remapped via standard bhs
 336      char       isid[6];
 337      short      tsih;
 338      int        itt;    // Initiator Task Tag;
 339      int        _2;
 340      rsp_sn_t   sn;
 341      int        status:16;
 342      int        _3:16;
 343      int        _4[2];
 344 } login_rsp_t;
 345
 346 typedef struct text_req {
 347      char       cmd;    // 0x04
 348
 349      u_char     _1:6;
 350      u_char     C:1;    // Continuation
 351      u_char     F:1;    // Final
 352      char       _2[2];
 353
 354      int        len;
 355      int        itt;            // Initiator Task Tag
 356      int        LUN[2];
 357      int        ttt;            // Target Transfer Tag
 358      int        cmdSN;
 359      int        expStatSN;
 360      int        unused[4];
 361 } text_req_t;
 362
 363 typedef struct logout_req {
 364      char       cmd;    // 0x06
 365      char       reason; // 0 - close session
 366                         // 1 - close connection
 367                         // 2 - remove the connection for recovery
 368      char       _2[2];
 369
 370      int        len;
 371      int        _r[2];
 372      int        itt;    // Initiator Task Tag;
 373
 374      u_int      CID:16;
 375      u_int      rsv:16;
 376
 377      int        cmdSN;
 378      int        expStatSN;
 379      int        unused[4];
 380 } logout_req_t;
 381
 382 typedef struct logout_rsp {
 383      char       cmd;    // 0x26
 384      char       cbits;
 385      char       _1[2];
 386      int        len;
 387      int        _2[2];
 388      int        itt;
 389      int        _3;
 390      rsp_sn_t   sn;
 391      short      time2wait;
 392      short      time2retain;
 393      int        _4;
 394 } logout_rsp_t;
 395
 396 union ipdu_u {
 397      bhs_t      bhs;
 398      scsi_req_t scsi_req;
 399      scsi_rsp_t scsi_rsp;
 400      nop_out_t  nop_out;
 401      nop_in_t   nop_in;
 402      r2t_t      r2t;
 403      data_out_t data_out;
 404      data_in_t  data_in;
 405      reject_t   reject;
 406      async_t    async;
 407 };
 408
 409 /*
 410  | Sequence Numbers
 411  */
 412 typedef struct {
 413      u_int      itt;
 414      u_int      cmd;
 415      u_int      expCmd;
 416      u_int      maxCmd;
 417      u_int      stat;
 418      u_int      expStat;
 419      u_int      data;
 420 } sn_t;
 421
 422 /*
 423  | in-core version of a Protocol Data Unit
 424  */
 425 typedef struct {
 426      union ipdu_u       ipdu;
 427
 428      ahs_t              *ahs;
 429      u_int              ahs_len;
 430      u_int              ahs_size;       // the allocated size
 431      u_int              hdr_dig;        // header digest
 432
 433      u_char             *ds;
 434      u_int              ds_len;
 435      u_int              ds_size;        // the allocated size
 436      u_int              ds_dig;         // data digest
 437 } pdu_t;
 438
 439 typedef struct opvals {
 440      int        port;
 441      int        tags;
 442      int        maxluns;
 443      int        sockbufsize;
 444
 445      int        maxConnections;
 446      int        maxRecvDataSegmentLength;
 447      int        maxXmitDataSegmentLength; // pseudo ...
 448      int        maxBurstLength;
 449      int        firstBurstLength;
 450      int        defaultTime2Wait;
 451      int        defaultTime2Retain;
 452      int        maxOutstandingR2T;
 453      int        errorRecoveryLevel;
 454      int        targetPortalGroupTag;
 455
 456      bool       initialR2T;
 457      bool       immediateData;
 458      bool       dataPDUInOrder;
 459      bool       dataSequenceInOrder;
 460      char       *headerDigest;
 461      char       *dataDigest;
 462      char       *sessionType;
 463      char       *sendTargets;
 464      char       *targetAddress;
 465      char       *targetAlias;
 466      char       *targetName;
 467      char       *initiatorName;
 468      char       *initiatorAlias;
 469      char       *authMethod;
 470      char       *chapSecret;
 471      char       *chapIName;
 472      char       *chapDigest;
 473      char       *tgtChapName;
 474      char       *tgtChapSecret;
 475      int        tgtChallengeLen;
 476      u_char     tgtChapID;
 477      char       *tgtChapDigest;
 478      char       *iqn;
 479 } isc_opt_t;
 480
 481 /*
 482  | ioctl
 483  */
 484 #define ISCSISETSES     _IOR('i', 1, int)
 485 #define ISCSISETSOC     _IOW('i', 2, int)
 486 #define ISCSISETOPT     _IOW('i', 5, isc_opt_t)
 487 #define ISCSIGETOPT     _IOR('i', 6, isc_opt_t)
 488
 489 #define ISCSISEND       _IOW('i', 10, pdu_t)
 490 #define ISCSIRECV       _IOWR('i', 11, pdu_t)
 491
 492 #define ISCSIPING       _IO('i', 20)
 493 #define ISCSISIGNAL     _IOW('i', 21, int *)
 494
 495 #define ISCSISTART      _IO('i', 30)
 496 #define ISCSIRESTART    _IO('i', 31)
 497 #define ISCSISTOP       _IO('i', 32)
 498
 499 typedef struct iscsi_cam {
 500      path_id_t          path_id;
 501      target_id_t        target_id;
 502      int                target_nluns;
 503      lun_id_t           target_lun[ISCSI_MAX_LUNS];
 504 } iscsi_cam_t;
 505
 506 #define ISCSIGETCAM     _IOR('i', 33, iscsi_cam_t)