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         ISCSI_UEVENT_PING               = UEVENT_BASE + 22,
  64         ISCSI_UEVENT_GET_CHAP           = UEVENT_BASE + 23,
  65         ISCSI_UEVENT_DELETE_CHAP        = UEVENT_BASE + 24,
  66
  67         /* up events */
  68         ISCSI_KEVENT_RECV_PDU           = KEVENT_BASE + 1,
  69         ISCSI_KEVENT_CONN_ERROR         = KEVENT_BASE + 2,
  70         ISCSI_KEVENT_IF_ERROR           = KEVENT_BASE + 3,
  71         ISCSI_KEVENT_DESTROY_SESSION    = KEVENT_BASE + 4,
  72         ISCSI_KEVENT_UNBIND_SESSION     = KEVENT_BASE + 5,
  73         ISCSI_KEVENT_CREATE_SESSION     = KEVENT_BASE + 6,
  74
  75         ISCSI_KEVENT_PATH_REQ           = KEVENT_BASE + 7,
  76         ISCSI_KEVENT_IF_DOWN            = KEVENT_BASE + 8,
  77         ISCSI_KEVENT_CONN_LOGIN_STATE   = KEVENT_BASE + 9,
  78         ISCSI_KEVENT_HOST_EVENT         = KEVENT_BASE + 10,
  79         ISCSI_KEVENT_PING_COMP          = KEVENT_BASE + 11,
  80 };
  81
  82 enum iscsi_tgt_dscvr {
  83         ISCSI_TGT_DSCVR_SEND_TARGETS    = 1,
  84         ISCSI_TGT_DSCVR_ISNS            = 2,
  85         ISCSI_TGT_DSCVR_SLP             = 3,
  86 };
  87
  88 enum iscsi_host_event_code {
  89         ISCSI_EVENT_LINKUP              = 1,
  90         ISCSI_EVENT_LINKDOWN,
  91         /* must always be last */
  92         ISCSI_EVENT_MAX,
  93 };
  94
  95 struct iscsi_uevent {
  96         uint32_t type; /* k/u events type */
  97         uint32_t iferror; /* carries interface or resource errors */
  98         uint64_t transport_handle;
  99
 100         union {
 101                 /* messages u -> k */
 102                 struct msg_create_session {
 103                         uint32_t        initial_cmdsn;
 104                         uint16_t        cmds_max;
 105                         uint16_t        queue_depth;
 106                 } c_session;
 107                 struct msg_create_bound_session {
 108                         uint64_t        ep_handle;
 109                         uint32_t        initial_cmdsn;
 110                         uint16_t        cmds_max;
 111                         uint16_t        queue_depth;
 112                 } c_bound_session;
 113                 struct msg_destroy_session {
 114                         uint32_t        sid;
 115                 } d_session;
 116                 struct msg_create_conn {
 117                         uint32_t        sid;
 118                         uint32_t        cid;
 119                 } c_conn;
 120                 struct msg_bind_conn {
 121                         uint32_t        sid;
 122                         uint32_t        cid;
 123                         uint64_t        transport_eph;
 124                         uint32_t        is_leading;
 125                 } b_conn;
 126                 struct msg_destroy_conn {
 127                         uint32_t        sid;
 128                         uint32_t        cid;
 129                 } d_conn;
 130                 struct msg_send_pdu {
 131                         uint32_t        sid;
 132                         uint32_t        cid;
 133                         uint32_t        hdr_size;
 134                         uint32_t        data_size;
 135                 } send_pdu;
 136                 struct msg_set_param {
 137                         uint32_t        sid;
 138                         uint32_t        cid;
 139                         uint32_t        param; /* enum iscsi_param */
 140                         uint32_t        len;
 141                 } set_param;
 142                 struct msg_start_conn {
 143                         uint32_t        sid;
 144                         uint32_t        cid;
 145                 } start_conn;
 146                 struct msg_stop_conn {
 147                         uint32_t        sid;
 148                         uint32_t        cid;
 149                         uint64_t        conn_handle;
 150                         uint32_t        flag;
 151                 } stop_conn;
 152                 struct msg_get_stats {
 153                         uint32_t        sid;
 154                         uint32_t        cid;
 155                 } get_stats;
 156                 struct msg_transport_connect {
 157                         uint32_t        non_blocking;
 158                 } ep_connect;
 159                 struct msg_transport_connect_through_host {
 160                         uint32_t        host_no;
 161                         uint32_t        non_blocking;
 162                 } ep_connect_through_host;
 163                 struct msg_transport_poll {
 164                         uint64_t        ep_handle;
 165                         uint32_t        timeout_ms;
 166                 } ep_poll;
 167                 struct msg_transport_disconnect {
 168                         uint64_t        ep_handle;
 169                 } ep_disconnect;
 170                 struct msg_tgt_dscvr {
 171                         enum iscsi_tgt_dscvr    type;
 172                         uint32_t        host_no;
 173                         /*
 174                          * enable = 1 to establish a new connection
 175                          * with the server. enable = 0 to disconnect
 176                          * from the server. Used primarily to switch
 177                          * from one iSNS server to another.
 178                          */
 179                         uint32_t        enable;
 180                 } tgt_dscvr;
 181                 struct msg_set_host_param {
 182                         uint32_t        host_no;
 183                         uint32_t        param; /* enum iscsi_host_param */
 184                         uint32_t        len;
 185                 } set_host_param;
 186                 struct msg_set_path {
 187                         uint32_t        host_no;
 188                 } set_path;
 189                 struct msg_set_iface_params {
 190                         uint32_t        host_no;
 191                         uint32_t        count;
 192                 } set_iface_params;
 193                 struct msg_iscsi_ping {
 194                         uint32_t        host_no;
 195                         uint32_t        iface_num;
 196                         uint32_t        iface_type;
 197                         uint32_t        payload_size;
 198                         uint32_t        pid;    /* unique ping id associated
 199                                                    with each ping request */
 200                 } iscsi_ping;
 201                 struct msg_get_chap {
 202                         uint32_t        host_no;
 203                         uint32_t        num_entries; /* number of CHAP entries
 204                                                       * on request, number of
 205                                                       * valid CHAP entries on
 206                                                       * response */
 207                         uint16_t        chap_tbl_idx;
 208                 } get_chap;
 209                 struct msg_delete_chap {
 210                        uint32_t        host_no;
 211                        uint16_t        chap_tbl_idx;
 212                 } delete_chap;
 213         } u;
 214         union {
 215                 /* messages k -> u */
 216                 int                     retcode;
 217                 struct msg_create_session_ret {
 218                         uint32_t        sid;
 219                         uint32_t        host_no;
 220                 } c_session_ret;
 221                 struct msg_create_conn_ret {
 222                         uint32_t        sid;
 223                         uint32_t        cid;
 224                 } c_conn_ret;
 225                 struct msg_unbind_session {
 226                         uint32_t        sid;
 227                         uint32_t        host_no;
 228                 } unbind_session;
 229                 struct msg_recv_req {
 230                         uint32_t        sid;
 231                         uint32_t        cid;
 232                         uint64_t        recv_handle;
 233                 } recv_req;
 234                 struct msg_conn_login {
 235                         uint32_t        sid;
 236                         uint32_t        cid;
 237                         uint32_t        state; /* enum iscsi_conn_state */
 238                 } conn_login;
 239                 struct msg_conn_error {
 240                         uint32_t        sid;
 241                         uint32_t        cid;
 242                         uint32_t        error; /* enum iscsi_err */
 243                 } connerror;
 244                 struct msg_session_destroyed {
 245                         uint32_t        host_no;
 246                         uint32_t        sid;
 247                 } d_session;
 248                 struct msg_transport_connect_ret {
 249                         uint64_t        handle;
 250                 } ep_connect_ret;
 251                 struct msg_req_path {
 252                         uint32_t        host_no;
 253                 } req_path;
 254                 struct msg_notify_if_down {
 255                         uint32_t        host_no;
 256                 } notify_if_down;
 257                 struct msg_host_event {
 258                         uint32_t        host_no;
 259                         uint32_t        data_size;
 260                         enum iscsi_host_event_code code;
 261                 } host_event;
 262                 struct msg_ping_comp {
 263                         uint32_t        host_no;
 264                         uint32_t        status;
 265                         uint32_t        pid;    /* unique ping id associated
 266                                                    with each ping request */
 267                         uint32_t        data_size;
 268                 } ping_comp;
 269         } r;
 270 } __attribute__ ((aligned (sizeof(uint64_t))));
 271
 272 enum iscsi_param_type {
 273         ISCSI_PARAM,            /* iscsi_param (session, conn, target, LU) */
 274         ISCSI_HOST_PARAM,       /* iscsi_host_param */
 275         ISCSI_NET_PARAM,        /* iscsi_net_param */
 276 };
 277
 278 struct iscsi_iface_param_info {
 279         uint32_t iface_num;     /* iface number, 0 - n */
 280         uint32_t len;           /* Actual length of the param */
 281         uint16_t param;         /* iscsi param value */
 282         uint8_t iface_type;     /* IPv4 or IPv6 */
 283         uint8_t param_type;     /* iscsi_param_type */
 284         uint8_t value[0];       /* length sized value follows */
 285 } __packed;
 286
 287 /*
 288  * To keep the struct iscsi_uevent size the same for userspace code
 289  * compatibility, the main structure for ISCSI_UEVENT_PATH_UPDATE and
 290  * ISCSI_KEVENT_PATH_REQ is defined separately and comes after the
 291  * struct iscsi_uevent in the NETLINK_ISCSI message.
 292  */
 293 struct iscsi_path {
 294         uint64_t        handle;
 295         uint8_t         mac_addr[6];
 296         uint8_t         mac_addr_old[6];
 297         uint32_t        ip_addr_len;    /* 4 or 16 */
 298         union {
 299                 struct in_addr  v4_addr;
 300                 struct in6_addr v6_addr;
 301         } src;
 302         union {
 303                 struct in_addr  v4_addr;
 304                 struct in6_addr v6_addr;
 305         } dst;
 306         uint16_t        vlan_id;
 307         uint16_t        pmtu;
 308 } __attribute__ ((aligned (sizeof(uint64_t))));
 309
 310 /* iscsi iface enabled/disabled setting */
 311 #define ISCSI_IFACE_DISABLE     0x01
 312 #define ISCSI_IFACE_ENABLE      0x02
 313
 314 /* ipv4 bootproto */
 315 #define ISCSI_BOOTPROTO_STATIC          0x01
 316 #define ISCSI_BOOTPROTO_DHCP            0x02
 317
 318 /* ipv6 addr autoconfig type */
 319 #define ISCSI_IPV6_AUTOCFG_DISABLE              0x01
 320 #define ISCSI_IPV6_AUTOCFG_ND_ENABLE            0x02
 321 #define ISCSI_IPV6_AUTOCFG_DHCPV6_ENABLE        0x03
 322
 323 /* ipv6 link local addr type */
 324 #define ISCSI_IPV6_LINKLOCAL_AUTOCFG_ENABLE     0x01
 325 #define ISCSI_IPV6_LINKLOCAL_AUTOCFG_DISABLE    0x02
 326
 327 /* ipv6 router addr type */
 328 #define ISCSI_IPV6_ROUTER_AUTOCFG_ENABLE        0x01
 329 #define ISCSI_IPV6_ROUTER_AUTOCFG_DISABLE       0x02
 330
 331 #define ISCSI_IFACE_TYPE_IPV4           0x01
 332 #define ISCSI_IFACE_TYPE_IPV6           0x02
 333
 334 #define ISCSI_MAX_VLAN_ID               4095
 335 #define ISCSI_MAX_VLAN_PRIORITY         7
 336
 337 /* iscsi vlan enable/disabled setting */
 338 #define ISCSI_VLAN_DISABLE      0x01
 339 #define ISCSI_VLAN_ENABLE       0x02
 340
 341 /* iSCSI network params */
 342 enum iscsi_net_param {
 343         ISCSI_NET_PARAM_IPV4_ADDR               = 1,
 344         ISCSI_NET_PARAM_IPV4_SUBNET             = 2,
 345         ISCSI_NET_PARAM_IPV4_GW                 = 3,
 346         ISCSI_NET_PARAM_IPV4_BOOTPROTO          = 4,
 347         ISCSI_NET_PARAM_MAC                     = 5,
 348         ISCSI_NET_PARAM_IPV6_LINKLOCAL          = 6,
 349         ISCSI_NET_PARAM_IPV6_ADDR               = 7,
 350         ISCSI_NET_PARAM_IPV6_ROUTER             = 8,
 351         ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG       = 9,
 352         ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG  = 10,
 353         ISCSI_NET_PARAM_IPV6_ROUTER_AUTOCFG     = 11,
 354         ISCSI_NET_PARAM_IFACE_ENABLE            = 12,
 355         ISCSI_NET_PARAM_VLAN_ID                 = 13,
 356         ISCSI_NET_PARAM_VLAN_PRIORITY           = 14,
 357         ISCSI_NET_PARAM_VLAN_ENABLED            = 15,
 358         ISCSI_NET_PARAM_VLAN_TAG                = 16,
 359         ISCSI_NET_PARAM_IFACE_TYPE              = 17,
 360         ISCSI_NET_PARAM_IFACE_NAME              = 18,
 361         ISCSI_NET_PARAM_MTU                     = 19,
 362         ISCSI_NET_PARAM_PORT                    = 20,
 363 };
 364
 365 enum iscsi_conn_state {
 366         ISCSI_CONN_STATE_FREE,
 367         ISCSI_CONN_STATE_XPT_WAIT,
 368         ISCSI_CONN_STATE_IN_LOGIN,
 369         ISCSI_CONN_STATE_LOGGED_IN,
 370         ISCSI_CONN_STATE_IN_LOGOUT,
 371         ISCSI_CONN_STATE_LOGOUT_REQUESTED,
 372         ISCSI_CONN_STATE_CLEANUP_WAIT,
 373 };
 374
 375 /*
 376  * Common error codes
 377  */
 378 enum iscsi_err {
 379         ISCSI_OK                        = 0,
 380
 381         ISCSI_ERR_DATASN                = ISCSI_ERR_BASE + 1,
 382         ISCSI_ERR_DATA_OFFSET           = ISCSI_ERR_BASE + 2,
 383         ISCSI_ERR_MAX_CMDSN             = ISCSI_ERR_BASE + 3,
 384         ISCSI_ERR_EXP_CMDSN             = ISCSI_ERR_BASE + 4,
 385         ISCSI_ERR_BAD_OPCODE            = ISCSI_ERR_BASE + 5,
 386         ISCSI_ERR_DATALEN               = ISCSI_ERR_BASE + 6,
 387         ISCSI_ERR_AHSLEN                = ISCSI_ERR_BASE + 7,
 388         ISCSI_ERR_PROTO                 = ISCSI_ERR_BASE + 8,
 389         ISCSI_ERR_LUN                   = ISCSI_ERR_BASE + 9,
 390         ISCSI_ERR_BAD_ITT               = ISCSI_ERR_BASE + 10,
 391         ISCSI_ERR_CONN_FAILED           = ISCSI_ERR_BASE + 11,
 392         ISCSI_ERR_R2TSN                 = ISCSI_ERR_BASE + 12,
 393         ISCSI_ERR_SESSION_FAILED        = ISCSI_ERR_BASE + 13,
 394         ISCSI_ERR_HDR_DGST              = ISCSI_ERR_BASE + 14,
 395         ISCSI_ERR_DATA_DGST             = ISCSI_ERR_BASE + 15,
 396         ISCSI_ERR_PARAM_NOT_FOUND       = ISCSI_ERR_BASE + 16,
 397         ISCSI_ERR_NO_SCSI_CMD           = ISCSI_ERR_BASE + 17,
 398         ISCSI_ERR_INVALID_HOST          = ISCSI_ERR_BASE + 18,
 399         ISCSI_ERR_XMIT_FAILED           = ISCSI_ERR_BASE + 19,
 400         ISCSI_ERR_TCP_CONN_CLOSE        = ISCSI_ERR_BASE + 20,
 401         ISCSI_ERR_SCSI_EH_SESSION_RST   = ISCSI_ERR_BASE + 21,
 402 };
 403
 404 /*
 405  * iSCSI Parameters (RFC3720)
 406  */
 407 enum iscsi_param {
 408         /* passed in using netlink set param */
 409         ISCSI_PARAM_MAX_RECV_DLENGTH,
 410         ISCSI_PARAM_MAX_XMIT_DLENGTH,
 411         ISCSI_PARAM_HDRDGST_EN,
 412         ISCSI_PARAM_DATADGST_EN,
 413         ISCSI_PARAM_INITIAL_R2T_EN,
 414         ISCSI_PARAM_MAX_R2T,
 415         ISCSI_PARAM_IMM_DATA_EN,
 416         ISCSI_PARAM_FIRST_BURST,
 417         ISCSI_PARAM_MAX_BURST,
 418         ISCSI_PARAM_PDU_INORDER_EN,
 419         ISCSI_PARAM_DATASEQ_INORDER_EN,
 420         ISCSI_PARAM_ERL,
 421         ISCSI_PARAM_IFMARKER_EN,
 422         ISCSI_PARAM_OFMARKER_EN,
 423         ISCSI_PARAM_EXP_STATSN,
 424         ISCSI_PARAM_TARGET_NAME,
 425         ISCSI_PARAM_TPGT,
 426         ISCSI_PARAM_PERSISTENT_ADDRESS,
 427         ISCSI_PARAM_PERSISTENT_PORT,
 428         ISCSI_PARAM_SESS_RECOVERY_TMO,
 429
 430         /* passed in through bind conn using transport_fd */
 431         ISCSI_PARAM_CONN_PORT,
 432         ISCSI_PARAM_CONN_ADDRESS,
 433
 434         ISCSI_PARAM_USERNAME,
 435         ISCSI_PARAM_USERNAME_IN,
 436         ISCSI_PARAM_PASSWORD,
 437         ISCSI_PARAM_PASSWORD_IN,
 438
 439         ISCSI_PARAM_FAST_ABORT,
 440         ISCSI_PARAM_ABORT_TMO,
 441         ISCSI_PARAM_LU_RESET_TMO,
 442         ISCSI_PARAM_HOST_RESET_TMO,
 443
 444         ISCSI_PARAM_PING_TMO,
 445         ISCSI_PARAM_RECV_TMO,
 446
 447         ISCSI_PARAM_IFACE_NAME,
 448         ISCSI_PARAM_ISID,
 449         ISCSI_PARAM_INITIATOR_NAME,
 450
 451         ISCSI_PARAM_TGT_RESET_TMO,
 452         ISCSI_PARAM_TARGET_ALIAS,
 453
 454         ISCSI_PARAM_CHAP_IN_IDX,
 455         ISCSI_PARAM_CHAP_OUT_IDX,
 456         /* must always be last */
 457         ISCSI_PARAM_MAX,
 458 };
 459
 460 /* iSCSI HBA params */
 461 enum iscsi_host_param {
 462         ISCSI_HOST_PARAM_HWADDRESS,
 463         ISCSI_HOST_PARAM_INITIATOR_NAME,
 464         ISCSI_HOST_PARAM_NETDEV_NAME,
 465         ISCSI_HOST_PARAM_IPADDRESS,
 466         ISCSI_HOST_PARAM_PORT_STATE,
 467         ISCSI_HOST_PARAM_PORT_SPEED,
 468         ISCSI_HOST_PARAM_MAX,
 469 };
 470
 471 /* iSCSI port Speed */
 472 enum iscsi_port_speed {
 473         ISCSI_PORT_SPEED_UNKNOWN        = 0x1,
 474         ISCSI_PORT_SPEED_10MBPS         = 0x2,
 475         ISCSI_PORT_SPEED_100MBPS        = 0x4,
 476         ISCSI_PORT_SPEED_1GBPS          = 0x8,
 477         ISCSI_PORT_SPEED_10GBPS         = 0x10,
 478 };
 479
 480 /* iSCSI port state */
 481 enum iscsi_port_state {
 482         ISCSI_PORT_STATE_DOWN           = 0x1,
 483         ISCSI_PORT_STATE_UP             = 0x2,
 484 };
 485
 486 #define iscsi_ptr(_handle) ((void*)(unsigned long)_handle)
 487 #define iscsi_handle(_ptr) ((uint64_t)(unsigned long)_ptr)
 488
 489 /*
 490  * These flags presents iSCSI Data-Path capabilities.
 491  */
 492 #define CAP_RECOVERY_L0         0x1
 493 #define CAP_RECOVERY_L1         0x2
 494 #define CAP_RECOVERY_L2         0x4
 495 #define CAP_MULTI_R2T           0x8
 496 #define CAP_HDRDGST             0x10
 497 #define CAP_DATADGST            0x20
 498 #define CAP_MULTI_CONN          0x40
 499 #define CAP_TEXT_NEGO           0x80
 500 #define CAP_MARKERS             0x100
 501 #define CAP_FW_DB               0x200
 502 #define CAP_SENDTARGETS_OFFLOAD 0x400   /* offload discovery process */
 503 #define CAP_DATA_PATH_OFFLOAD   0x800   /* offload entire IO path */
 504 #define CAP_DIGEST_OFFLOAD      0x1000  /* offload hdr and data digests */
 505 #define CAP_PADDING_OFFLOAD     0x2000  /* offload padding insertion, removal,
 506                                          and verification */
 507 #define CAP_LOGIN_OFFLOAD       0x4000  /* offload session login */
 508
 509 /*
 510  * These flags describes reason of stop_conn() call
 511  */
 512 #define STOP_CONN_TERM          0x1
 513 #define STOP_CONN_SUSPEND       0x2
 514 #define STOP_CONN_RECOVER       0x3
 515
 516 #define ISCSI_STATS_CUSTOM_MAX          32
 517 #define ISCSI_STATS_CUSTOM_DESC_MAX     64
 518 struct iscsi_stats_custom {
 519         char desc[ISCSI_STATS_CUSTOM_DESC_MAX];
 520         uint64_t value;
 521 };
 522
 523 /*
 524  * struct iscsi_stats - iSCSI Statistics (iSCSI MIB)
 525  *
 526  * Note: this structure contains counters collected on per-connection basis.
 527  */
 528 struct iscsi_stats {
 529         /* octets */
 530         uint64_t txdata_octets;
 531         uint64_t rxdata_octets;
 532
 533         /* xmit pdus */
 534         uint32_t noptx_pdus;
 535         uint32_t scsicmd_pdus;
 536         uint32_t tmfcmd_pdus;
 537         uint32_t login_pdus;
 538         uint32_t text_pdus;
 539         uint32_t dataout_pdus;
 540         uint32_t logout_pdus;
 541         uint32_t snack_pdus;
 542
 543         /* recv pdus */
 544         uint32_t noprx_pdus;
 545         uint32_t scsirsp_pdus;
 546         uint32_t tmfrsp_pdus;
 547         uint32_t textrsp_pdus;
 548         uint32_t datain_pdus;
 549         uint32_t logoutrsp_pdus;
 550         uint32_t r2t_pdus;
 551         uint32_t async_pdus;
 552         uint32_t rjt_pdus;
 553
 554         /* errors */
 555         uint32_t digest_err;
 556         uint32_t timeout_err;
 557
 558         /*
 559          * iSCSI Custom Statistics support, i.e. Transport could
 560          * extend existing MIB statistics with its own specific statistics
 561          * up to ISCSI_STATS_CUSTOM_MAX
 562          */
 563         uint32_t custom_length;
 564         struct iscsi_stats_custom custom[0]
 565                 __attribute__ ((aligned (sizeof(uint64_t))));
 566 };
 567
 568 enum chap_type_e {
 569         CHAP_TYPE_OUT,
 570         CHAP_TYPE_IN,
 571 };
 572
 573 #define ISCSI_CHAP_AUTH_NAME_MAX_LEN    256
 574 #define ISCSI_CHAP_AUTH_SECRET_MAX_LEN  256
 575 struct iscsi_chap_rec {
 576         uint16_t chap_tbl_idx;
 577         enum chap_type_e chap_type;
 578         char username[ISCSI_CHAP_AUTH_NAME_MAX_LEN];
 579         uint8_t password[ISCSI_CHAP_AUTH_SECRET_MAX_LEN];
 580         uint8_t password_length;
 581 } __packed;
 582
 583 #endif