include/scsi/iscsi_if.h

   1 /*
   2  * iSCSI User/Kernel Shares (Defines, Constants, Protocol definitions, etc)
   3  *
   4  * Copyright (C) 2005 Dmitry Yusupov
   5  * Copyright (C) 2005 Alex Aizman
   6  * maintained by open-iscsi@googlegroups.com
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published
  10  * by the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16  * General Public License for more details.
  17  *
  18  * See the file COPYING included with this distribution for more details.
  19  */
  20
  21 #ifndef ISCSI_IF_H
  22 #define ISCSI_IF_H
  23
  24 #include <scsi/iscsi_proto.h>
  25 #include <linux/in.h>
  26 #include <linux/in6.h>
  27
  28 #define ISCSI_NL_GRP_ISCSID     1
  29 #define ISCSI_NL_GRP_UIP        2
  30
  31 #define UEVENT_BASE                     10
  32 #define KEVENT_BASE                     100
  33 #define ISCSI_ERR_BASE                  1000
  34
  35 enum iscsi_uevent_e {
  36         ISCSI_UEVENT_UNKNOWN            = 0,
  37
  38         /* down events */
  39         ISCSI_UEVENT_CREATE_SESSION     = UEVENT_BASE + 1,
  40         ISCSI_UEVENT_DESTROY_SESSION    = UEVENT_BASE + 2,
  41         ISCSI_UEVENT_CREATE_CONN        = UEVENT_BASE + 3,
  42         ISCSI_UEVENT_DESTROY_CONN       = UEVENT_BASE + 4,
  43         ISCSI_UEVENT_BIND_CONN          = UEVENT_BASE + 5,
  44         ISCSI_UEVENT_SET_PARAM          = UEVENT_BASE + 6,
  45         ISCSI_UEVENT_START_CONN         = UEVENT_BASE + 7,
  46         ISCSI_UEVENT_STOP_CONN          = UEVENT_BASE + 8,
  47         ISCSI_UEVENT_SEND_PDU           = UEVENT_BASE + 9,
  48         ISCSI_UEVENT_GET_STATS          = UEVENT_BASE + 10,
  49         ISCSI_UEVENT_GET_PARAM          = UEVENT_BASE + 11,
  50
  51         ISCSI_UEVENT_TRANSPORT_EP_CONNECT       = UEVENT_BASE + 12,
  52         ISCSI_UEVENT_TRANSPORT_EP_POLL          = UEVENT_BASE + 13,
  53         ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT    = UEVENT_BASE + 14,
  54
  55         ISCSI_UEVENT_TGT_DSCVR          = UEVENT_BASE + 15,
  56         ISCSI_UEVENT_SET_HOST_PARAM     = UEVENT_BASE + 16,
  57         ISCSI_UEVENT_UNBIND_SESSION     = UEVENT_BASE + 17,
  58         ISCSI_UEVENT_CREATE_BOUND_SESSION               = UEVENT_BASE + 18,
  59         ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST  = UEVENT_BASE + 19,
  60
  61         ISCSI_UEVENT_PATH_UPDATE        = UEVENT_BASE + 20,
  62         ISCSI_UEVENT_SET_IFACE_PARAMS   = UEVENT_BASE + 21,
  63
  64         /* up events */
  65         ISCSI_KEVENT_RECV_PDU           = KEVENT_BASE + 1,
  66         ISCSI_KEVENT_CONN_ERROR         = KEVENT_BASE + 2,
  67         ISCSI_KEVENT_IF_ERROR           = KEVENT_BASE + 3,
  68         ISCSI_KEVENT_DESTROY_SESSION    = KEVENT_BASE + 4,
  69         ISCSI_KEVENT_UNBIND_SESSION     = KEVENT_BASE + 5,
  70         ISCSI_KEVENT_CREATE_SESSION     = KEVENT_BASE + 6,
  71
  72         ISCSI_KEVENT_PATH_REQ           = KEVENT_BASE + 7,
  73         ISCSI_KEVENT_IF_DOWN            = KEVENT_BASE + 8,
  74         ISCSI_KEVENT_CONN_LOGIN_STATE   = KEVENT_BASE + 9,
  75 };
  76
  77 enum iscsi_tgt_dscvr {
  78         ISCSI_TGT_DSCVR_SEND_TARGETS    = 1,
  79         ISCSI_TGT_DSCVR_ISNS            = 2,
  80         ISCSI_TGT_DSCVR_SLP             = 3,
  81 };
  82
  83 struct iscsi_uevent {
  84         uint32_t type; /* k/u events type */
  85         uint32_t iferror; /* carries interface or resource errors */
  86         uint64_t transport_handle;
  87
  88         union {
  89                 /* messages u -> k */
  90                 struct msg_create_session {
  91                         uint32_t        initial_cmdsn;
  92                         uint16_t        cmds_max;
  93                         uint16_t        queue_depth;
  94                 } c_session;
  95                 struct msg_create_bound_session {
  96                         uint64_t        ep_handle;
  97                         uint32_t        initial_cmdsn;
  98                         uint16_t        cmds_max;
  99                         uint16_t        queue_depth;
 100                 } c_bound_session;
 101                 struct msg_destroy_session {
 102                         uint32_t        sid;
 103                 } d_session;
 104                 struct msg_create_conn {
 105                         uint32_t        sid;
 106                         uint32_t        cid;
 107                 } c_conn;
 108                 struct msg_bind_conn {
 109                         uint32_t        sid;
 110                         uint32_t        cid;
 111                         uint64_t        transport_eph;
 112                         uint32_t        is_leading;
 113                 } b_conn;
 114                 struct msg_destroy_conn {
 115                         uint32_t        sid;
 116                         uint32_t        cid;
 117                 } d_conn;
 118                 struct msg_send_pdu {
 119                         uint32_t        sid;
 120                         uint32_t        cid;
 121                         uint32_t        hdr_size;
 122                         uint32_t        data_size;
 123                 } send_pdu;
 124                 struct msg_set_param {
 125                         uint32_t        sid;
 126                         uint32_t        cid;
 127                         uint32_t        param; /* enum iscsi_param */
 128                         uint32_t        len;
 129                 } set_param;
 130                 struct msg_start_conn {
 131                         uint32_t        sid;
 132                         uint32_t        cid;
 133                 } start_conn;
 134                 struct msg_stop_conn {
 135                         uint32_t        sid;
 136                         uint32_t        cid;
 137                         uint64_t        conn_handle;
 138                         uint32_t        flag;
 139                 } stop_conn;
 140                 struct msg_get_stats {
 141                         uint32_t        sid;
 142                         uint32_t        cid;
 143                 } get_stats;
 144                 struct msg_transport_connect {
 145                         uint32_t        non_blocking;
 146                 } ep_connect;
 147                 struct msg_transport_connect_through_host {
 148                         uint32_t        host_no;
 149                         uint32_t        non_blocking;
 150                 } ep_connect_through_host;
 151                 struct msg_transport_poll {
 152                         uint64_t        ep_handle;
 153                         uint32_t        timeout_ms;
 154                 } ep_poll;
 155                 struct msg_transport_disconnect {
 156                         uint64_t        ep_handle;
 157                 } ep_disconnect;
 158                 struct msg_tgt_dscvr {
 159                         enum iscsi_tgt_dscvr    type;
 160                         uint32_t        host_no;
 161                         /*
 162                          * enable = 1 to establish a new connection
 163                          * with the server. enable = 0 to disconnect
 164                          * from the server. Used primarily to switch
 165                          * from one iSNS server to another.
 166                          */
 167                         uint32_t        enable;
 168                 } tgt_dscvr;
 169                 struct msg_set_host_param {
 170                         uint32_t        host_no;
 171                         uint32_t        param; /* enum iscsi_host_param */
 172                         uint32_t        len;
 173                 } set_host_param;
 174                 struct msg_set_path {
 175                         uint32_t        host_no;
 176                 } set_path;
 177                 struct msg_set_iface_params {
 178                         uint32_t        host_no;
 179                         uint32_t        count;
 180                 } set_iface_params;
 181         } u;
 182         union {
 183                 /* messages k -> u */
 184                 int                     retcode;
 185                 struct msg_create_session_ret {
 186                         uint32_t        sid;
 187                         uint32_t        host_no;
 188                 } c_session_ret;
 189                 struct msg_create_conn_ret {
 190                         uint32_t        sid;
 191                         uint32_t        cid;
 192                 } c_conn_ret;
 193                 struct msg_unbind_session {
 194                         uint32_t        sid;
 195                         uint32_t        host_no;
 196                 } unbind_session;
 197                 struct msg_recv_req {
 198                         uint32_t        sid;
 199                         uint32_t        cid;
 200                         uint64_t        recv_handle;
 201                 } recv_req;
 202                 struct msg_conn_login {
 203                         uint32_t        sid;
 204                         uint32_t        cid;
 205                         uint32_t        state; /* enum iscsi_conn_state */
 206                 } conn_login;
 207                 struct msg_conn_error {
 208                         uint32_t        sid;
 209                         uint32_t        cid;
 210                         uint32_t        error; /* enum iscsi_err */
 211                 } connerror;
 212                 struct msg_session_destroyed {
 213                         uint32_t        host_no;
 214                         uint32_t        sid;
 215                 } d_session;
 216                 struct msg_transport_connect_ret {
 217                         uint64_t        handle;
 218                 } ep_connect_ret;
 219                 struct msg_req_path {
 220                         uint32_t        host_no;
 221                 } req_path;
 222                 struct msg_notify_if_down {
 223                         uint32_t        host_no;
 224                 } notify_if_down;
 225         } r;
 226 } __attribute__ ((aligned (sizeof(uint64_t))));
 227
 228 enum iscsi_param_type {
 229         ISCSI_PARAM,            /* iscsi_param (session, conn, target, LU) */
 230         ISCSI_HOST_PARAM,       /* iscsi_host_param */
 231         ISCSI_NET_PARAM,        /* iscsi_net_param */
 232 };
 233
 234 struct iscsi_iface_param_info {
 235         uint32_t iface_num;     /* iface number, 0 - n */
 236         uint32_t len;           /* Actual length of the param */
 237         uint16_t param;         /* iscsi param value */
 238         uint8_t iface_type;     /* IPv4 or IPv6 */
 239         uint8_t param_type;     /* iscsi_param_type */
 240         uint8_t value[0];       /* length sized value follows */
 241 } __packed;
 242
 243 /*
 244  * To keep the struct iscsi_uevent size the same for userspace code
 245  * compatibility, the main structure for ISCSI_UEVENT_PATH_UPDATE and
 246  * ISCSI_KEVENT_PATH_REQ is defined separately and comes after the
 247  * struct iscsi_uevent in the NETLINK_ISCSI message.
 248  */
 249 struct iscsi_path {
 250         uint64_t        handle;
 251         uint8_t         mac_addr[6];
 252         uint8_t         mac_addr_old[6];
 253         uint32_t        ip_addr_len;    /* 4 or 16 */
 254         union {
 255                 struct in_addr  v4_addr;
 256                 struct in6_addr v6_addr;
 257         } src;
 258         union {
 259                 struct in_addr  v4_addr;
 260                 struct in6_addr v6_addr;
 261         } dst;
 262         uint16_t        vlan_id;
 263         uint16_t        pmtu;
 264 } __attribute__ ((aligned (sizeof(uint64_t))));
 265
 266 /* iscsi iface enabled/disabled setting */
 267 #define ISCSI_IFACE_DISABLE     0x01
 268 #define ISCSI_IFACE_ENABLE      0x02
 269
 270 /* ipv4 bootproto */
 271 #define ISCSI_BOOTPROTO_STATIC          0x01
 272 #define ISCSI_BOOTPROTO_DHCP            0x02
 273
 274 /* ipv6 addr autoconfig type */
 275 #define ISCSI_IPV6_AUTOCFG_DISABLE              0x01
 276 #define ISCSI_IPV6_AUTOCFG_ND_ENABLE            0x02
 277 #define ISCSI_IPV6_AUTOCFG_DHCPV6_ENABLE        0x03
 278
 279 /* ipv6 link local addr type */
 280 #define ISCSI_IPV6_LINKLOCAL_AUTOCFG_ENABLE     0x01
 281 #define ISCSI_IPV6_LINKLOCAL_AUTOCFG_DISABLE    0x02
 282
 283 /* ipv6 router addr type */
 284 #define ISCSI_IPV6_ROUTER_AUTOCFG_ENABLE        0x01
 285 #define ISCSI_IPV6_ROUTER_AUTOCFG_DISABLE       0x02
 286
 287 #define ISCSI_IFACE_TYPE_IPV4           0x01
 288 #define ISCSI_IFACE_TYPE_IPV6           0x02
 289
 290 #define ISCSI_MAX_VLAN_ID               4095
 291 #define ISCSI_MAX_VLAN_PRIORITY         7
 292
 293 /* iscsi vlan enable/disabled setting */
 294 #define ISCSI_VLAN_DISABLE      0x01
 295 #define ISCSI_VLAN_ENABLE       0x02
 296
 297 /* iSCSI network params */
 298 enum iscsi_net_param {
 299         ISCSI_NET_PARAM_IPV4_ADDR               = 1,
 300         ISCSI_NET_PARAM_IPV4_SUBNET             = 2,
 301         ISCSI_NET_PARAM_IPV4_GW                 = 3,
 302         ISCSI_NET_PARAM_IPV4_BOOTPROTO          = 4,
 303         ISCSI_NET_PARAM_MAC                     = 5,
 304         ISCSI_NET_PARAM_IPV6_LINKLOCAL          = 6,
 305         ISCSI_NET_PARAM_IPV6_ADDR               = 7,
 306         ISCSI_NET_PARAM_IPV6_ROUTER             = 8,
 307         ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG       = 9,
 308         ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG  = 10,
 309         ISCSI_NET_PARAM_IPV6_ROUTER_AUTOCFG     = 11,
 310         ISCSI_NET_PARAM_IFACE_ENABLE            = 12,
 311         ISCSI_NET_PARAM_VLAN_ID                 = 13,
 312         ISCSI_NET_PARAM_VLAN_PRIORITY           = 14,
 313         ISCSI_NET_PARAM_VLAN_ENABLED            = 15,
 314         ISCSI_NET_PARAM_VLAN_TAG                = 16,
 315         ISCSI_NET_PARAM_IFACE_TYPE              = 17,
 316         ISCSI_NET_PARAM_IFACE_NAME              = 18,
 317         ISCSI_NET_PARAM_MTU                     = 19,
 318         ISCSI_NET_PARAM_PORT                    = 20,
 319 };
 320
 321 enum iscsi_conn_state {
 322         ISCSI_CONN_STATE_FREE,
 323         ISCSI_CONN_STATE_XPT_WAIT,
 324         ISCSI_CONN_STATE_IN_LOGIN,
 325         ISCSI_CONN_STATE_LOGGED_IN,
 326         ISCSI_CONN_STATE_IN_LOGOUT,
 327         ISCSI_CONN_STATE_LOGOUT_REQUESTED,
 328         ISCSI_CONN_STATE_CLEANUP_WAIT,
 329 };
 330
 331 /*
 332  * Common error codes
 333  */
 334 enum iscsi_err {
 335         ISCSI_OK                        = 0,
 336
 337         ISCSI_ERR_DATASN                = ISCSI_ERR_BASE + 1,
 338         ISCSI_ERR_DATA_OFFSET           = ISCSI_ERR_BASE + 2,
 339         ISCSI_ERR_MAX_CMDSN             = ISCSI_ERR_BASE + 3,
 340         ISCSI_ERR_EXP_CMDSN             = ISCSI_ERR_BASE + 4,
 341         ISCSI_ERR_BAD_OPCODE            = ISCSI_ERR_BASE + 5,
 342         ISCSI_ERR_DATALEN               = ISCSI_ERR_BASE + 6,
 343         ISCSI_ERR_AHSLEN                = ISCSI_ERR_BASE + 7,
 344         ISCSI_ERR_PROTO                 = ISCSI_ERR_BASE + 8,
 345         ISCSI_ERR_LUN                   = ISCSI_ERR_BASE + 9,
 346         ISCSI_ERR_BAD_ITT               = ISCSI_ERR_BASE + 10,
 347         ISCSI_ERR_CONN_FAILED           = ISCSI_ERR_BASE + 11,
 348         ISCSI_ERR_R2TSN                 = ISCSI_ERR_BASE + 12,
 349         ISCSI_ERR_SESSION_FAILED        = ISCSI_ERR_BASE + 13,
 350         ISCSI_ERR_HDR_DGST              = ISCSI_ERR_BASE + 14,
 351         ISCSI_ERR_DATA_DGST             = ISCSI_ERR_BASE + 15,
 352         ISCSI_ERR_PARAM_NOT_FOUND       = ISCSI_ERR_BASE + 16,
 353         ISCSI_ERR_NO_SCSI_CMD           = ISCSI_ERR_BASE + 17,
 354         ISCSI_ERR_INVALID_HOST          = ISCSI_ERR_BASE + 18,
 355         ISCSI_ERR_XMIT_FAILED           = ISCSI_ERR_BASE + 19,
 356         ISCSI_ERR_TCP_CONN_CLOSE        = ISCSI_ERR_BASE + 20,
 357         ISCSI_ERR_SCSI_EH_SESSION_RST   = ISCSI_ERR_BASE + 21,
 358 };
 359
 360 /*
 361  * iSCSI Parameters (RFC3720)
 362  */
 363 enum iscsi_param {
 364         /* passed in using netlink set param */
 365         ISCSI_PARAM_MAX_RECV_DLENGTH,
 366         ISCSI_PARAM_MAX_XMIT_DLENGTH,
 367         ISCSI_PARAM_HDRDGST_EN,
 368         ISCSI_PARAM_DATADGST_EN,
 369         ISCSI_PARAM_INITIAL_R2T_EN,
 370         ISCSI_PARAM_MAX_R2T,
 371         ISCSI_PARAM_IMM_DATA_EN,
 372         ISCSI_PARAM_FIRST_BURST,
 373         ISCSI_PARAM_MAX_BURST,
 374         ISCSI_PARAM_PDU_INORDER_EN,
 375         ISCSI_PARAM_DATASEQ_INORDER_EN,
 376         ISCSI_PARAM_ERL,
 377         ISCSI_PARAM_IFMARKER_EN,
 378         ISCSI_PARAM_OFMARKER_EN,
 379         ISCSI_PARAM_EXP_STATSN,
 380         ISCSI_PARAM_TARGET_NAME,
 381         ISCSI_PARAM_TPGT,
 382         ISCSI_PARAM_PERSISTENT_ADDRESS,
 383         ISCSI_PARAM_PERSISTENT_PORT,
 384         ISCSI_PARAM_SESS_RECOVERY_TMO,
 385
 386         /* passed in through bind conn using transport_fd */
 387         ISCSI_PARAM_CONN_PORT,
 388         ISCSI_PARAM_CONN_ADDRESS,
 389
 390         ISCSI_PARAM_USERNAME,
 391         ISCSI_PARAM_USERNAME_IN,
 392         ISCSI_PARAM_PASSWORD,
 393         ISCSI_PARAM_PASSWORD_IN,
 394
 395         ISCSI_PARAM_FAST_ABORT,
 396         ISCSI_PARAM_ABORT_TMO,
 397         ISCSI_PARAM_LU_RESET_TMO,
 398         ISCSI_PARAM_HOST_RESET_TMO,
 399
 400         ISCSI_PARAM_PING_TMO,
 401         ISCSI_PARAM_RECV_TMO,
 402
 403         ISCSI_PARAM_IFACE_NAME,
 404         ISCSI_PARAM_ISID,
 405         ISCSI_PARAM_INITIATOR_NAME,
 406
 407         ISCSI_PARAM_TGT_RESET_TMO,
 408         ISCSI_PARAM_TARGET_ALIAS,
 409         /* must always be last */
 410         ISCSI_PARAM_MAX,
 411 };
 412
 413 /* iSCSI HBA params */
 414 enum iscsi_host_param {
 415         ISCSI_HOST_PARAM_HWADDRESS,
 416         ISCSI_HOST_PARAM_INITIATOR_NAME,
 417         ISCSI_HOST_PARAM_NETDEV_NAME,
 418         ISCSI_HOST_PARAM_IPADDRESS,
 419         ISCSI_HOST_PARAM_MAX,
 420 };
 421
 422 #define iscsi_ptr(_handle) ((void*)(unsigned long)_handle)
 423 #define iscsi_handle(_ptr) ((uint64_t)(unsigned long)_ptr)
 424
 425 /*
 426  * These flags presents iSCSI Data-Path capabilities.
 427  */
 428 #define CAP_RECOVERY_L0         0x1
 429 #define CAP_RECOVERY_L1         0x2
 430 #define CAP_RECOVERY_L2         0x4
 431 #define CAP_MULTI_R2T           0x8
 432 #define CAP_HDRDGST             0x10
 433 #define CAP_DATADGST            0x20
 434 #define CAP_MULTI_CONN          0x40
 435 #define CAP_TEXT_NEGO           0x80
 436 #define CAP_MARKERS             0x100
 437 #define CAP_FW_DB               0x200
 438 #define CAP_SENDTARGETS_OFFLOAD 0x400   /* offload discovery process */
 439 #define CAP_DATA_PATH_OFFLOAD   0x800   /* offload entire IO path */
 440 #define CAP_DIGEST_OFFLOAD      0x1000  /* offload hdr and data digests */
 441 #define CAP_PADDING_OFFLOAD     0x2000  /* offload padding insertion, removal,
 442                                          and verification */
 443 #define CAP_LOGIN_OFFLOAD       0x4000  /* offload session login */
 444
 445 /*
 446  * These flags describes reason of stop_conn() call
 447  */
 448 #define STOP_CONN_TERM          0x1
 449 #define STOP_CONN_SUSPEND       0x2
 450 #define STOP_CONN_RECOVER       0x3
 451
 452 #define ISCSI_STATS_CUSTOM_MAX          32
 453 #define ISCSI_STATS_CUSTOM_DESC_MAX     64
 454 struct iscsi_stats_custom {
 455         char desc[ISCSI_STATS_CUSTOM_DESC_MAX];
 456         uint64_t value;
 457 };
 458
 459 /*
 460  * struct iscsi_stats - iSCSI Statistics (iSCSI MIB)
 461  *
 462  * Note: this structure contains counters collected on per-connection basis.
 463  */
 464 struct iscsi_stats {
 465         /* octets */
 466         uint64_t txdata_octets;
 467         uint64_t rxdata_octets;
 468
 469         /* xmit pdus */
 470         uint32_t noptx_pdus;
 471         uint32_t scsicmd_pdus;
 472         uint32_t tmfcmd_pdus;
 473         uint32_t login_pdus;
 474         uint32_t text_pdus;
 475         uint32_t dataout_pdus;
 476         uint32_t logout_pdus;
 477         uint32_t snack_pdus;
 478
 479         /* recv pdus */
 480         uint32_t noprx_pdus;
 481         uint32_t scsirsp_pdus;
 482         uint32_t tmfrsp_pdus;
 483         uint32_t textrsp_pdus;
 484         uint32_t datain_pdus;
 485         uint32_t logoutrsp_pdus;
 486         uint32_t r2t_pdus;
 487         uint32_t async_pdus;
 488         uint32_t rjt_pdus;
 489
 490         /* errors */
 491         uint32_t digest_err;
 492         uint32_t timeout_err;
 493
 494         /*
 495          * iSCSI Custom Statistics support, i.e. Transport could
 496          * extend existing MIB statistics with its own specific statistics
 497          * up to ISCSI_STATS_CUSTOM_MAX
 498          */
 499         uint32_t custom_length;
 500         struct iscsi_stats_custom custom[0]
 501                 __attribute__ ((aligned (sizeof(uint64_t))));
 502 };
 503
 504 #endif