include/scsi/iscsi_if.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * iSCSI User/Kernel Shares (Defines, Constants, Protocol definitions, etc)
   4  *
   5  * Copyright (C) 2005 Dmitry Yusupov
   6  * Copyright (C) 2005 Alex Aizman
   7  * maintained by open-iscsi@googlegroups.com
   8  */
   9
  10 #ifndef ISCSI_IF_H
  11 #define ISCSI_IF_H
  12
  13 #include <scsi/iscsi_proto.h>
  14 #include <linux/in.h>
  15 #include <linux/in6.h>
  16
  17 #define ISCSI_NL_GRP_ISCSID     1
  18 #define ISCSI_NL_GRP_UIP        2
  19
  20 #define UEVENT_BASE                     10
  21 #define KEVENT_BASE                     100
  22 #define ISCSI_ERR_BASE                  1000
  23
  24 enum iscsi_uevent_e {
  25         ISCSI_UEVENT_UNKNOWN            = 0,
  26
  27         /* down events */
  28         ISCSI_UEVENT_CREATE_SESSION     = UEVENT_BASE + 1,
  29         ISCSI_UEVENT_DESTROY_SESSION    = UEVENT_BASE + 2,
  30         ISCSI_UEVENT_CREATE_CONN        = UEVENT_BASE + 3,
  31         ISCSI_UEVENT_DESTROY_CONN       = UEVENT_BASE + 4,
  32         ISCSI_UEVENT_BIND_CONN          = UEVENT_BASE + 5,
  33         ISCSI_UEVENT_SET_PARAM          = UEVENT_BASE + 6,
  34         ISCSI_UEVENT_START_CONN         = UEVENT_BASE + 7,
  35         ISCSI_UEVENT_STOP_CONN          = UEVENT_BASE + 8,
  36         ISCSI_UEVENT_SEND_PDU           = UEVENT_BASE + 9,
  37         ISCSI_UEVENT_GET_STATS          = UEVENT_BASE + 10,
  38         ISCSI_UEVENT_GET_PARAM          = UEVENT_BASE + 11,
  39
  40         ISCSI_UEVENT_TRANSPORT_EP_CONNECT       = UEVENT_BASE + 12,
  41         ISCSI_UEVENT_TRANSPORT_EP_POLL          = UEVENT_BASE + 13,
  42         ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT    = UEVENT_BASE + 14,
  43
  44         ISCSI_UEVENT_TGT_DSCVR          = UEVENT_BASE + 15,
  45         ISCSI_UEVENT_SET_HOST_PARAM     = UEVENT_BASE + 16,
  46         ISCSI_UEVENT_UNBIND_SESSION     = UEVENT_BASE + 17,
  47         ISCSI_UEVENT_CREATE_BOUND_SESSION               = UEVENT_BASE + 18,
  48         ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST  = UEVENT_BASE + 19,
  49
  50         ISCSI_UEVENT_PATH_UPDATE        = UEVENT_BASE + 20,
  51         ISCSI_UEVENT_SET_IFACE_PARAMS   = UEVENT_BASE + 21,
  52         ISCSI_UEVENT_PING               = UEVENT_BASE + 22,
  53         ISCSI_UEVENT_GET_CHAP           = UEVENT_BASE + 23,
  54         ISCSI_UEVENT_DELETE_CHAP        = UEVENT_BASE + 24,
  55         ISCSI_UEVENT_SET_FLASHNODE_PARAMS       = UEVENT_BASE + 25,
  56         ISCSI_UEVENT_NEW_FLASHNODE      = UEVENT_BASE + 26,
  57         ISCSI_UEVENT_DEL_FLASHNODE      = UEVENT_BASE + 27,
  58         ISCSI_UEVENT_LOGIN_FLASHNODE    = UEVENT_BASE + 28,
  59         ISCSI_UEVENT_LOGOUT_FLASHNODE   = UEVENT_BASE + 29,
  60         ISCSI_UEVENT_LOGOUT_FLASHNODE_SID       = UEVENT_BASE + 30,
  61         ISCSI_UEVENT_SET_CHAP           = UEVENT_BASE + 31,
  62         ISCSI_UEVENT_GET_HOST_STATS     = UEVENT_BASE + 32,
  63         ISCSI_UEVENT_DESTROY_SESSION_ASYNC      = UEVENT_BASE + 33,
  64
  65         /* up events */
  66         ISCSI_KEVENT_RECV_PDU           = KEVENT_BASE + 1,
  67         ISCSI_KEVENT_CONN_ERROR         = KEVENT_BASE + 2,
  68         ISCSI_KEVENT_IF_ERROR           = KEVENT_BASE + 3,
  69         ISCSI_KEVENT_DESTROY_SESSION    = KEVENT_BASE + 4,
  70         ISCSI_KEVENT_UNBIND_SESSION     = KEVENT_BASE + 5,
  71         ISCSI_KEVENT_CREATE_SESSION     = KEVENT_BASE + 6,
  72
  73         ISCSI_KEVENT_PATH_REQ           = KEVENT_BASE + 7,
  74         ISCSI_KEVENT_IF_DOWN            = KEVENT_BASE + 8,
  75         ISCSI_KEVENT_CONN_LOGIN_STATE   = KEVENT_BASE + 9,
  76         ISCSI_KEVENT_HOST_EVENT         = KEVENT_BASE + 10,
  77         ISCSI_KEVENT_PING_COMP          = KEVENT_BASE + 11,
  78 };
  79
  80 enum iscsi_tgt_dscvr {
  81         ISCSI_TGT_DSCVR_SEND_TARGETS    = 1,
  82         ISCSI_TGT_DSCVR_ISNS            = 2,
  83         ISCSI_TGT_DSCVR_SLP             = 3,
  84 };
  85
  86 enum iscsi_host_event_code {
  87         ISCSI_EVENT_LINKUP              = 1,
  88         ISCSI_EVENT_LINKDOWN,
  89         /* must always be last */
  90         ISCSI_EVENT_MAX,
  91 };
  92
  93 struct iscsi_uevent {
  94         uint32_t type; /* k/u events type */
  95         uint32_t iferror; /* carries interface or resource errors */
  96         uint64_t transport_handle;
  97
  98         union {
  99                 /* messages u -> k */
 100                 struct msg_create_session {
 101                         uint32_t        initial_cmdsn;
 102                         uint16_t        cmds_max;
 103                         uint16_t        queue_depth;
 104                 } c_session;
 105                 struct msg_create_bound_session {
 106                         uint64_t        ep_handle;
 107                         uint32_t        initial_cmdsn;
 108                         uint16_t        cmds_max;
 109                         uint16_t        queue_depth;
 110                 } c_bound_session;
 111                 struct msg_destroy_session {
 112                         uint32_t        sid;
 113                 } d_session;
 114                 struct msg_create_conn {
 115                         uint32_t        sid;
 116                         uint32_t        cid;
 117                 } c_conn;
 118                 struct msg_bind_conn {
 119                         uint32_t        sid;
 120                         uint32_t        cid;
 121                         uint64_t        transport_eph;
 122                         uint32_t        is_leading;
 123                 } b_conn;
 124                 struct msg_destroy_conn {
 125                         uint32_t        sid;
 126                         uint32_t        cid;
 127                 } d_conn;
 128                 struct msg_send_pdu {
 129                         uint32_t        sid;
 130                         uint32_t        cid;
 131                         uint32_t        hdr_size;
 132                         uint32_t        data_size;
 133                 } send_pdu;
 134                 struct msg_set_param {
 135                         uint32_t        sid;
 136                         uint32_t        cid;
 137                         uint32_t        param; /* enum iscsi_param */
 138                         uint32_t        len;
 139                 } set_param;
 140                 struct msg_start_conn {
 141                         uint32_t        sid;
 142                         uint32_t        cid;
 143                 } start_conn;
 144                 struct msg_stop_conn {
 145                         uint32_t        sid;
 146                         uint32_t        cid;
 147                         uint64_t        conn_handle;
 148                         uint32_t        flag;
 149                 } stop_conn;
 150                 struct msg_get_stats {
 151                         uint32_t        sid;
 152                         uint32_t        cid;
 153                 } get_stats;
 154                 struct msg_transport_connect {
 155                         uint32_t        non_blocking;
 156                 } ep_connect;
 157                 struct msg_transport_connect_through_host {
 158                         uint32_t        host_no;
 159                         uint32_t        non_blocking;
 160                 } ep_connect_through_host;
 161                 struct msg_transport_poll {
 162                         uint64_t        ep_handle;
 163                         uint32_t        timeout_ms;
 164                 } ep_poll;
 165                 struct msg_transport_disconnect {
 166                         uint64_t        ep_handle;
 167                 } ep_disconnect;
 168                 struct msg_tgt_dscvr {
 169                         enum iscsi_tgt_dscvr    type;
 170                         uint32_t        host_no;
 171                         /*
 172                          * enable = 1 to establish a new connection
 173                          * with the server. enable = 0 to disconnect
 174                          * from the server. Used primarily to switch
 175                          * from one iSNS server to another.
 176                          */
 177                         uint32_t        enable;
 178                 } tgt_dscvr;
 179                 struct msg_set_host_param {
 180                         uint32_t        host_no;
 181                         uint32_t        param; /* enum iscsi_host_param */
 182                         uint32_t        len;
 183                 } set_host_param;
 184                 struct msg_set_path {
 185                         uint32_t        host_no;
 186                 } set_path;
 187                 struct msg_set_iface_params {
 188                         uint32_t        host_no;
 189                         uint32_t        count;
 190                 } set_iface_params;
 191                 struct msg_iscsi_ping {
 192                         uint32_t        host_no;
 193                         uint32_t        iface_num;
 194                         uint32_t        iface_type;
 195                         uint32_t        payload_size;
 196                         uint32_t        pid;    /* unique ping id associated
 197                                                    with each ping request */
 198                 } iscsi_ping;
 199                 struct msg_get_chap {
 200                         uint32_t        host_no;
 201                         uint32_t        num_entries; /* number of CHAP entries
 202                                                       * on request, number of
 203                                                       * valid CHAP entries on
 204                                                       * response */
 205                         uint16_t        chap_tbl_idx;
 206                 } get_chap;
 207                 struct msg_delete_chap {
 208                        uint32_t        host_no;
 209                        uint16_t        chap_tbl_idx;
 210                 } delete_chap;
 211                 struct msg_set_flashnode_param {
 212                         uint32_t        host_no;
 213                         uint32_t        flashnode_idx;
 214                         uint32_t        count;
 215                 } set_flashnode;
 216                 struct msg_new_flashnode {
 217                         uint32_t        host_no;
 218                         uint32_t        len;
 219                 } new_flashnode;
 220                 struct msg_del_flashnode {
 221                         uint32_t        host_no;
 222                         uint32_t        flashnode_idx;
 223                 } del_flashnode;
 224                 struct msg_login_flashnode {
 225                         uint32_t        host_no;
 226                         uint32_t        flashnode_idx;
 227                 } login_flashnode;
 228                 struct msg_logout_flashnode {
 229                         uint32_t        host_no;
 230                         uint32_t        flashnode_idx;
 231                 } logout_flashnode;
 232                 struct msg_logout_flashnode_sid {
 233                         uint32_t        host_no;
 234                         uint32_t        sid;
 235                 } logout_flashnode_sid;
 236                 struct msg_get_host_stats {
 237                         uint32_t host_no;
 238                 } get_host_stats;
 239         } u;
 240         union {
 241                 /* messages k -> u */
 242                 int                     retcode;
 243                 struct msg_create_session_ret {
 244                         uint32_t        sid;
 245                         uint32_t        host_no;
 246                 } c_session_ret;
 247                 struct msg_create_conn_ret {
 248                         uint32_t        sid;
 249                         uint32_t        cid;
 250                 } c_conn_ret;
 251                 struct msg_unbind_session {
 252                         uint32_t        sid;
 253                         uint32_t        host_no;
 254                 } unbind_session;
 255                 struct msg_recv_req {
 256                         uint32_t        sid;
 257                         uint32_t        cid;
 258                         uint64_t        recv_handle;
 259                 } recv_req;
 260                 struct msg_conn_login {
 261                         uint32_t        sid;
 262                         uint32_t        cid;
 263                         uint32_t        state; /* enum iscsi_conn_state */
 264                 } conn_login;
 265                 struct msg_conn_error {
 266                         uint32_t        sid;
 267                         uint32_t        cid;
 268                         uint32_t        error; /* enum iscsi_err */
 269                 } connerror;
 270                 struct msg_session_destroyed {
 271                         uint32_t        host_no;
 272                         uint32_t        sid;
 273                 } d_session;
 274                 struct msg_transport_connect_ret {
 275                         uint64_t        handle;
 276                 } ep_connect_ret;
 277                 struct msg_req_path {
 278                         uint32_t        host_no;
 279                 } req_path;
 280                 struct msg_notify_if_down {
 281                         uint32_t        host_no;
 282                 } notify_if_down;
 283                 struct msg_host_event {
 284                         uint32_t        host_no;
 285                         uint32_t        data_size;
 286                         enum iscsi_host_event_code code;
 287                 } host_event;
 288                 struct msg_ping_comp {
 289                         uint32_t        host_no;
 290                         uint32_t        status; /* enum
 291                                                  * iscsi_ping_status_code */
 292                         uint32_t        pid;    /* unique ping id associated
 293                                                    with each ping request */
 294                         uint32_t        data_size;
 295                 } ping_comp;
 296                 struct msg_new_flashnode_ret {
 297                         uint32_t        flashnode_idx;
 298                 } new_flashnode_ret;
 299         } r;
 300 } __attribute__ ((aligned (sizeof(uint64_t))));
 301
 302 enum iscsi_param_type {
 303         ISCSI_PARAM,            /* iscsi_param (session, conn, target, LU) */
 304         ISCSI_HOST_PARAM,       /* iscsi_host_param */
 305         ISCSI_NET_PARAM,        /* iscsi_net_param */
 306         ISCSI_FLASHNODE_PARAM,  /* iscsi_flashnode_param */
 307         ISCSI_CHAP_PARAM,       /* iscsi_chap_param */
 308         ISCSI_IFACE_PARAM,      /* iscsi_iface_param */
 309 };
 310
 311 /* structure for minimalist usecase */
 312 struct iscsi_param_info {
 313         uint32_t len;           /* Actual length of the param value */
 314         uint16_t param;         /* iscsi param */
 315         uint8_t value[];        /* length sized value follows */
 316 } __packed;
 317
 318 struct iscsi_iface_param_info {
 319         uint32_t iface_num;     /* iface number, 0 - n */
 320         uint32_t len;           /* Actual length of the param */
 321         uint16_t param;         /* iscsi param value */
 322         uint8_t iface_type;     /* IPv4 or IPv6 */
 323         uint8_t param_type;     /* iscsi_param_type */
 324         uint8_t value[];        /* length sized value follows */
 325 } __packed;
 326
 327 /*
 328  * To keep the struct iscsi_uevent size the same for userspace code
 329  * compatibility, the main structure for ISCSI_UEVENT_PATH_UPDATE and
 330  * ISCSI_KEVENT_PATH_REQ is defined separately and comes after the
 331  * struct iscsi_uevent in the NETLINK_ISCSI message.
 332  */
 333 struct iscsi_path {
 334         uint64_t        handle;
 335         uint8_t         mac_addr[6];
 336         uint8_t         mac_addr_old[6];
 337         uint32_t        ip_addr_len;    /* 4 or 16 */
 338         union {
 339                 struct in_addr  v4_addr;
 340                 struct in6_addr v6_addr;
 341         } src;
 342         union {
 343                 struct in_addr  v4_addr;
 344                 struct in6_addr v6_addr;
 345         } dst;
 346         uint16_t        vlan_id;
 347         uint16_t        pmtu;
 348 } __attribute__ ((aligned (sizeof(uint64_t))));
 349
 350 /* iscsi iface enabled/disabled setting */
 351 #define ISCSI_IFACE_DISABLE     0x01
 352 #define ISCSI_IFACE_ENABLE      0x02
 353
 354 /* ipv4 bootproto */
 355 #define ISCSI_BOOTPROTO_STATIC          0x01
 356 #define ISCSI_BOOTPROTO_DHCP            0x02
 357
 358 /* ipv6 addr autoconfig type */
 359 #define ISCSI_IPV6_AUTOCFG_DISABLE              0x01
 360 #define ISCSI_IPV6_AUTOCFG_ND_ENABLE            0x02
 361 #define ISCSI_IPV6_AUTOCFG_DHCPV6_ENABLE        0x03
 362
 363 /* ipv6 link local addr type */
 364 #define ISCSI_IPV6_LINKLOCAL_AUTOCFG_ENABLE     0x01
 365 #define ISCSI_IPV6_LINKLOCAL_AUTOCFG_DISABLE    0x02
 366
 367 /* ipv6 router addr type */
 368 #define ISCSI_IPV6_ROUTER_AUTOCFG_ENABLE        0x01
 369 #define ISCSI_IPV6_ROUTER_AUTOCFG_DISABLE       0x02
 370
 371 #define ISCSI_IFACE_TYPE_IPV4           0x01
 372 #define ISCSI_IFACE_TYPE_IPV6           0x02
 373
 374 #define ISCSI_MAX_VLAN_ID               4095
 375 #define ISCSI_MAX_VLAN_PRIORITY         7
 376
 377 /* iscsi vlan enable/disabled setting */
 378 #define ISCSI_VLAN_DISABLE      0x01
 379 #define ISCSI_VLAN_ENABLE       0x02
 380
 381 /* iscsi generic enable/disabled setting for various features */
 382 #define ISCSI_NET_PARAM_DISABLE         0x01
 383 #define ISCSI_NET_PARAM_ENABLE          0x02
 384
 385 /* iSCSI network params */
 386 enum iscsi_net_param {
 387         ISCSI_NET_PARAM_IPV4_ADDR               = 1,
 388         ISCSI_NET_PARAM_IPV4_SUBNET,
 389         ISCSI_NET_PARAM_IPV4_GW,
 390         ISCSI_NET_PARAM_IPV4_BOOTPROTO,
 391         ISCSI_NET_PARAM_MAC,
 392         ISCSI_NET_PARAM_IPV6_LINKLOCAL,
 393         ISCSI_NET_PARAM_IPV6_ADDR,
 394         ISCSI_NET_PARAM_IPV6_ROUTER,
 395         ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG,
 396         ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG,
 397         ISCSI_NET_PARAM_IPV6_ROUTER_AUTOCFG,
 398         ISCSI_NET_PARAM_IFACE_ENABLE,
 399         ISCSI_NET_PARAM_VLAN_ID,
 400         ISCSI_NET_PARAM_VLAN_PRIORITY,
 401         ISCSI_NET_PARAM_VLAN_ENABLED,
 402         ISCSI_NET_PARAM_VLAN_TAG,
 403         ISCSI_NET_PARAM_IFACE_TYPE,
 404         ISCSI_NET_PARAM_IFACE_NAME,
 405         ISCSI_NET_PARAM_MTU,
 406         ISCSI_NET_PARAM_PORT,
 407         ISCSI_NET_PARAM_IPADDR_STATE,
 408         ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE,
 409         ISCSI_NET_PARAM_IPV6_ROUTER_STATE,
 410         ISCSI_NET_PARAM_DELAYED_ACK_EN,
 411         ISCSI_NET_PARAM_TCP_NAGLE_DISABLE,
 412         ISCSI_NET_PARAM_TCP_WSF_DISABLE,
 413         ISCSI_NET_PARAM_TCP_WSF,
 414         ISCSI_NET_PARAM_TCP_TIMER_SCALE,
 415         ISCSI_NET_PARAM_TCP_TIMESTAMP_EN,
 416         ISCSI_NET_PARAM_CACHE_ID,
 417         ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN,
 418         ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN,
 419         ISCSI_NET_PARAM_IPV4_TOS_EN,
 420         ISCSI_NET_PARAM_IPV4_TOS,
 421         ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN,
 422         ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN,
 423         ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID,
 424         ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN,
 425         ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN,
 426         ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID,
 427         ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN,
 428         ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE,
 429         ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN,
 430         ISCSI_NET_PARAM_IPV4_TTL,
 431         ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN,
 432         ISCSI_NET_PARAM_IPV6_MLD_EN,
 433         ISCSI_NET_PARAM_IPV6_FLOW_LABEL,
 434         ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS,
 435         ISCSI_NET_PARAM_IPV6_HOP_LIMIT,
 436         ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO,
 437         ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME,
 438         ISCSI_NET_PARAM_IPV6_ND_STALE_TMO,
 439         ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT,
 440         ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU,
 441         ISCSI_NET_PARAM_REDIRECT_EN,
 442 };
 443
 444 enum iscsi_ipaddress_state {
 445         ISCSI_IPDDRESS_STATE_UNCONFIGURED,
 446         ISCSI_IPDDRESS_STATE_ACQUIRING,
 447         ISCSI_IPDDRESS_STATE_TENTATIVE,
 448         ISCSI_IPDDRESS_STATE_VALID,
 449         ISCSI_IPDDRESS_STATE_DISABLING,
 450         ISCSI_IPDDRESS_STATE_INVALID,
 451         ISCSI_IPDDRESS_STATE_DEPRECATED,
 452 };
 453
 454 enum iscsi_router_state {
 455         ISCSI_ROUTER_STATE_UNKNOWN,
 456         ISCSI_ROUTER_STATE_ADVERTISED,
 457         ISCSI_ROUTER_STATE_MANUAL,
 458         ISCSI_ROUTER_STATE_STALE,
 459 };
 460
 461 /* iSCSI specific settings params for iface */
 462 enum iscsi_iface_param {
 463         ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO,
 464         ISCSI_IFACE_PARAM_HDRDGST_EN,
 465         ISCSI_IFACE_PARAM_DATADGST_EN,
 466         ISCSI_IFACE_PARAM_IMM_DATA_EN,
 467         ISCSI_IFACE_PARAM_INITIAL_R2T_EN,
 468         ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN,
 469         ISCSI_IFACE_PARAM_PDU_INORDER_EN,
 470         ISCSI_IFACE_PARAM_ERL,
 471         ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH,
 472         ISCSI_IFACE_PARAM_FIRST_BURST,
 473         ISCSI_IFACE_PARAM_MAX_R2T,
 474         ISCSI_IFACE_PARAM_MAX_BURST,
 475         ISCSI_IFACE_PARAM_CHAP_AUTH_EN,
 476         ISCSI_IFACE_PARAM_BIDI_CHAP_EN,
 477         ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL,
 478         ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN,
 479         ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN,
 480         ISCSI_IFACE_PARAM_INITIATOR_NAME,
 481 };
 482
 483 enum iscsi_conn_state {
 484         ISCSI_CONN_STATE_FREE,
 485         ISCSI_CONN_STATE_XPT_WAIT,
 486         ISCSI_CONN_STATE_IN_LOGIN,
 487         ISCSI_CONN_STATE_LOGGED_IN,
 488         ISCSI_CONN_STATE_IN_LOGOUT,
 489         ISCSI_CONN_STATE_LOGOUT_REQUESTED,
 490         ISCSI_CONN_STATE_CLEANUP_WAIT,
 491 };
 492
 493 /*
 494  * Common error codes
 495  */
 496 enum iscsi_err {
 497         ISCSI_OK                        = 0,
 498
 499         ISCSI_ERR_DATASN                = ISCSI_ERR_BASE + 1,
 500         ISCSI_ERR_DATA_OFFSET           = ISCSI_ERR_BASE + 2,
 501         ISCSI_ERR_MAX_CMDSN             = ISCSI_ERR_BASE + 3,
 502         ISCSI_ERR_EXP_CMDSN             = ISCSI_ERR_BASE + 4,
 503         ISCSI_ERR_BAD_OPCODE            = ISCSI_ERR_BASE + 5,
 504         ISCSI_ERR_DATALEN               = ISCSI_ERR_BASE + 6,
 505         ISCSI_ERR_AHSLEN                = ISCSI_ERR_BASE + 7,
 506         ISCSI_ERR_PROTO                 = ISCSI_ERR_BASE + 8,
 507         ISCSI_ERR_LUN                   = ISCSI_ERR_BASE + 9,
 508         ISCSI_ERR_BAD_ITT               = ISCSI_ERR_BASE + 10,
 509         ISCSI_ERR_CONN_FAILED           = ISCSI_ERR_BASE + 11,
 510         ISCSI_ERR_R2TSN                 = ISCSI_ERR_BASE + 12,
 511         ISCSI_ERR_SESSION_FAILED        = ISCSI_ERR_BASE + 13,
 512         ISCSI_ERR_HDR_DGST              = ISCSI_ERR_BASE + 14,
 513         ISCSI_ERR_DATA_DGST             = ISCSI_ERR_BASE + 15,
 514         ISCSI_ERR_PARAM_NOT_FOUND       = ISCSI_ERR_BASE + 16,
 515         ISCSI_ERR_NO_SCSI_CMD           = ISCSI_ERR_BASE + 17,
 516         ISCSI_ERR_INVALID_HOST          = ISCSI_ERR_BASE + 18,
 517         ISCSI_ERR_XMIT_FAILED           = ISCSI_ERR_BASE + 19,
 518         ISCSI_ERR_TCP_CONN_CLOSE        = ISCSI_ERR_BASE + 20,
 519         ISCSI_ERR_SCSI_EH_SESSION_RST   = ISCSI_ERR_BASE + 21,
 520         ISCSI_ERR_NOP_TIMEDOUT          = ISCSI_ERR_BASE + 22,
 521 };
 522
 523 /*
 524  * iSCSI Parameters (RFC3720)
 525  */
 526 enum iscsi_param {
 527         /* passed in using netlink set param */
 528         ISCSI_PARAM_MAX_RECV_DLENGTH,
 529         ISCSI_PARAM_MAX_XMIT_DLENGTH,
 530         ISCSI_PARAM_HDRDGST_EN,
 531         ISCSI_PARAM_DATADGST_EN,
 532         ISCSI_PARAM_INITIAL_R2T_EN,
 533         ISCSI_PARAM_MAX_R2T,
 534         ISCSI_PARAM_IMM_DATA_EN,
 535         ISCSI_PARAM_FIRST_BURST,
 536         ISCSI_PARAM_MAX_BURST,
 537         ISCSI_PARAM_PDU_INORDER_EN,
 538         ISCSI_PARAM_DATASEQ_INORDER_EN,
 539         ISCSI_PARAM_ERL,
 540         ISCSI_PARAM_IFMARKER_EN,
 541         ISCSI_PARAM_OFMARKER_EN,
 542         ISCSI_PARAM_EXP_STATSN,
 543         ISCSI_PARAM_TARGET_NAME,
 544         ISCSI_PARAM_TPGT,
 545         ISCSI_PARAM_PERSISTENT_ADDRESS,
 546         ISCSI_PARAM_PERSISTENT_PORT,
 547         ISCSI_PARAM_SESS_RECOVERY_TMO,
 548
 549         /* passed in through bind conn using transport_fd */
 550         ISCSI_PARAM_CONN_PORT,
 551         ISCSI_PARAM_CONN_ADDRESS,
 552
 553         ISCSI_PARAM_USERNAME,
 554         ISCSI_PARAM_USERNAME_IN,
 555         ISCSI_PARAM_PASSWORD,
 556         ISCSI_PARAM_PASSWORD_IN,
 557
 558         ISCSI_PARAM_FAST_ABORT,
 559         ISCSI_PARAM_ABORT_TMO,
 560         ISCSI_PARAM_LU_RESET_TMO,
 561         ISCSI_PARAM_HOST_RESET_TMO,
 562
 563         ISCSI_PARAM_PING_TMO,
 564         ISCSI_PARAM_RECV_TMO,
 565
 566         ISCSI_PARAM_IFACE_NAME,
 567         ISCSI_PARAM_ISID,
 568         ISCSI_PARAM_INITIATOR_NAME,
 569
 570         ISCSI_PARAM_TGT_RESET_TMO,
 571         ISCSI_PARAM_TARGET_ALIAS,
 572
 573         ISCSI_PARAM_CHAP_IN_IDX,
 574         ISCSI_PARAM_CHAP_OUT_IDX,
 575
 576         ISCSI_PARAM_BOOT_ROOT,
 577         ISCSI_PARAM_BOOT_NIC,
 578         ISCSI_PARAM_BOOT_TARGET,
 579
 580         ISCSI_PARAM_AUTO_SND_TGT_DISABLE,
 581         ISCSI_PARAM_DISCOVERY_SESS,
 582         ISCSI_PARAM_PORTAL_TYPE,
 583         ISCSI_PARAM_CHAP_AUTH_EN,
 584         ISCSI_PARAM_DISCOVERY_LOGOUT_EN,
 585         ISCSI_PARAM_BIDI_CHAP_EN,
 586         ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL,
 587
 588         ISCSI_PARAM_DEF_TIME2WAIT,
 589         ISCSI_PARAM_DEF_TIME2RETAIN,
 590         ISCSI_PARAM_MAX_SEGMENT_SIZE,
 591         ISCSI_PARAM_STATSN,
 592         ISCSI_PARAM_KEEPALIVE_TMO,
 593         ISCSI_PARAM_LOCAL_PORT,
 594         ISCSI_PARAM_TSID,
 595         ISCSI_PARAM_DEF_TASKMGMT_TMO,
 596
 597         ISCSI_PARAM_TCP_TIMESTAMP_STAT,
 598         ISCSI_PARAM_TCP_WSF_DISABLE,
 599         ISCSI_PARAM_TCP_NAGLE_DISABLE,
 600         ISCSI_PARAM_TCP_TIMER_SCALE,
 601         ISCSI_PARAM_TCP_TIMESTAMP_EN,
 602         ISCSI_PARAM_TCP_XMIT_WSF,
 603         ISCSI_PARAM_TCP_RECV_WSF,
 604         ISCSI_PARAM_IP_FRAGMENT_DISABLE,
 605         ISCSI_PARAM_IPV4_TOS,
 606         ISCSI_PARAM_IPV6_TC,
 607         ISCSI_PARAM_IPV6_FLOW_LABEL,
 608         ISCSI_PARAM_IS_FW_ASSIGNED_IPV6,
 609
 610         ISCSI_PARAM_DISCOVERY_PARENT_IDX,
 611         ISCSI_PARAM_DISCOVERY_PARENT_TYPE,
 612         ISCSI_PARAM_LOCAL_IPADDR,
 613         /* must always be last */
 614         ISCSI_PARAM_MAX,
 615 };
 616
 617 /* iSCSI HBA params */
 618 enum iscsi_host_param {
 619         ISCSI_HOST_PARAM_HWADDRESS,
 620         ISCSI_HOST_PARAM_INITIATOR_NAME,
 621         ISCSI_HOST_PARAM_NETDEV_NAME,
 622         ISCSI_HOST_PARAM_IPADDRESS,
 623         ISCSI_HOST_PARAM_PORT_STATE,
 624         ISCSI_HOST_PARAM_PORT_SPEED,
 625         ISCSI_HOST_PARAM_MAX,
 626 };
 627
 628 /* portal type */
 629 #define PORTAL_TYPE_IPV4        "ipv4"
 630 #define PORTAL_TYPE_IPV6        "ipv6"
 631
 632 /* iSCSI Flash Target params */
 633 enum iscsi_flashnode_param {
 634         ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6,
 635         ISCSI_FLASHNODE_PORTAL_TYPE,
 636         ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE,
 637         ISCSI_FLASHNODE_DISCOVERY_SESS,
 638         ISCSI_FLASHNODE_ENTRY_EN,
 639         ISCSI_FLASHNODE_HDR_DGST_EN,
 640         ISCSI_FLASHNODE_DATA_DGST_EN,
 641         ISCSI_FLASHNODE_IMM_DATA_EN,
 642         ISCSI_FLASHNODE_INITIAL_R2T_EN,
 643         ISCSI_FLASHNODE_DATASEQ_INORDER,
 644         ISCSI_FLASHNODE_PDU_INORDER,
 645         ISCSI_FLASHNODE_CHAP_AUTH_EN,
 646         ISCSI_FLASHNODE_SNACK_REQ_EN,
 647         ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN,
 648         ISCSI_FLASHNODE_BIDI_CHAP_EN,
 649         /* make authentication for discovery sessions optional */
 650         ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL,
 651         ISCSI_FLASHNODE_ERL,
 652         ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT,
 653         ISCSI_FLASHNODE_TCP_NAGLE_DISABLE,
 654         ISCSI_FLASHNODE_TCP_WSF_DISABLE,
 655         ISCSI_FLASHNODE_TCP_TIMER_SCALE,
 656         ISCSI_FLASHNODE_TCP_TIMESTAMP_EN,
 657         ISCSI_FLASHNODE_IP_FRAG_DISABLE,
 658         ISCSI_FLASHNODE_MAX_RECV_DLENGTH,
 659         ISCSI_FLASHNODE_MAX_XMIT_DLENGTH,
 660         ISCSI_FLASHNODE_FIRST_BURST,
 661         ISCSI_FLASHNODE_DEF_TIME2WAIT,
 662         ISCSI_FLASHNODE_DEF_TIME2RETAIN,
 663         ISCSI_FLASHNODE_MAX_R2T,
 664         ISCSI_FLASHNODE_KEEPALIVE_TMO,
 665         ISCSI_FLASHNODE_ISID,
 666         ISCSI_FLASHNODE_TSID,
 667         ISCSI_FLASHNODE_PORT,
 668         ISCSI_FLASHNODE_MAX_BURST,
 669         ISCSI_FLASHNODE_DEF_TASKMGMT_TMO,
 670         ISCSI_FLASHNODE_IPADDR,
 671         ISCSI_FLASHNODE_ALIAS,
 672         ISCSI_FLASHNODE_REDIRECT_IPADDR,
 673         ISCSI_FLASHNODE_MAX_SEGMENT_SIZE,
 674         ISCSI_FLASHNODE_LOCAL_PORT,
 675         ISCSI_FLASHNODE_IPV4_TOS,
 676         ISCSI_FLASHNODE_IPV6_TC,
 677         ISCSI_FLASHNODE_IPV6_FLOW_LABEL,
 678         ISCSI_FLASHNODE_NAME,
 679         ISCSI_FLASHNODE_TPGT,
 680         ISCSI_FLASHNODE_LINK_LOCAL_IPV6,
 681         ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX,
 682         ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE,
 683         ISCSI_FLASHNODE_TCP_XMIT_WSF,
 684         ISCSI_FLASHNODE_TCP_RECV_WSF,
 685         ISCSI_FLASHNODE_CHAP_IN_IDX,
 686         ISCSI_FLASHNODE_CHAP_OUT_IDX,
 687         ISCSI_FLASHNODE_USERNAME,
 688         ISCSI_FLASHNODE_USERNAME_IN,
 689         ISCSI_FLASHNODE_PASSWORD,
 690         ISCSI_FLASHNODE_PASSWORD_IN,
 691         ISCSI_FLASHNODE_STATSN,
 692         ISCSI_FLASHNODE_EXP_STATSN,
 693         ISCSI_FLASHNODE_IS_BOOT_TGT,
 694
 695         ISCSI_FLASHNODE_MAX,
 696 };
 697
 698 struct iscsi_flashnode_param_info {
 699         uint32_t len;           /* Actual length of the param */
 700         uint16_t param;         /* iscsi param value */
 701         uint8_t value[];        /* length sized value follows */
 702 } __packed;
 703
 704 enum iscsi_discovery_parent_type {
 705         ISCSI_DISC_PARENT_UNKNOWN       = 0x1,
 706         ISCSI_DISC_PARENT_SENDTGT       = 0x2,
 707         ISCSI_DISC_PARENT_ISNS          = 0x3,
 708 };
 709
 710 /* iSCSI port Speed */
 711 enum iscsi_port_speed {
 712         ISCSI_PORT_SPEED_UNKNOWN        = 0x1,
 713         ISCSI_PORT_SPEED_10MBPS         = 0x2,
 714         ISCSI_PORT_SPEED_100MBPS        = 0x4,
 715         ISCSI_PORT_SPEED_1GBPS          = 0x8,
 716         ISCSI_PORT_SPEED_10GBPS         = 0x10,
 717         ISCSI_PORT_SPEED_25GBPS         = 0x20,
 718         ISCSI_PORT_SPEED_40GBPS         = 0x40,
 719 };
 720
 721 /* iSCSI port state */
 722 enum iscsi_port_state {
 723         ISCSI_PORT_STATE_DOWN           = 0x1,
 724         ISCSI_PORT_STATE_UP             = 0x2,
 725 };
 726
 727 /* iSCSI PING status/error code */
 728 enum iscsi_ping_status_code {
 729         ISCSI_PING_SUCCESS                      = 0,
 730         ISCSI_PING_FW_DISABLED                  = 0x1,
 731         ISCSI_PING_IPADDR_INVALID               = 0x2,
 732         ISCSI_PING_LINKLOCAL_IPV6_ADDR_INVALID  = 0x3,
 733         ISCSI_PING_TIMEOUT                      = 0x4,
 734         ISCSI_PING_INVALID_DEST_ADDR            = 0x5,
 735         ISCSI_PING_OVERSIZE_PACKET              = 0x6,
 736         ISCSI_PING_ICMP_ERROR                   = 0x7,
 737         ISCSI_PING_MAX_REQ_EXCEEDED             = 0x8,
 738         ISCSI_PING_NO_ARP_RECEIVED              = 0x9,
 739 };
 740
 741 #define iscsi_ptr(_handle) ((void*)(unsigned long)_handle)
 742 #define iscsi_handle(_ptr) ((uint64_t)(unsigned long)_ptr)
 743
 744 /*
 745  * These flags presents iSCSI Data-Path capabilities.
 746  */
 747 #define CAP_RECOVERY_L0         0x1
 748 #define CAP_RECOVERY_L1         0x2
 749 #define CAP_RECOVERY_L2         0x4
 750 #define CAP_MULTI_R2T           0x8
 751 #define CAP_HDRDGST             0x10
 752 #define CAP_DATADGST            0x20
 753 #define CAP_MULTI_CONN          0x40
 754 #define CAP_TEXT_NEGO           0x80
 755 #define CAP_MARKERS             0x100
 756 #define CAP_FW_DB               0x200
 757 #define CAP_SENDTARGETS_OFFLOAD 0x400   /* offload discovery process */
 758 #define CAP_DATA_PATH_OFFLOAD   0x800   /* offload entire IO path */
 759 #define CAP_DIGEST_OFFLOAD      0x1000  /* offload hdr and data digests */
 760 #define CAP_PADDING_OFFLOAD     0x2000  /* offload padding insertion, removal,
 761                                          and verification */
 762 #define CAP_LOGIN_OFFLOAD       0x4000  /* offload session login */
 763
 764 /*
 765  * These flags describes reason of stop_conn() call
 766  */
 767 #define STOP_CONN_TERM          0x1
 768 #define STOP_CONN_SUSPEND       0x2
 769 #define STOP_CONN_RECOVER       0x3
 770
 771 #define ISCSI_STATS_CUSTOM_MAX          32
 772 #define ISCSI_STATS_CUSTOM_DESC_MAX     64
 773 struct iscsi_stats_custom {
 774         char desc[ISCSI_STATS_CUSTOM_DESC_MAX];
 775         uint64_t value;
 776 };
 777
 778 /*
 779  * struct iscsi_stats - iSCSI Statistics (iSCSI MIB)
 780  *
 781  * Note: this structure contains counters collected on per-connection basis.
 782  */
 783 struct iscsi_stats {
 784         /* octets */
 785         uint64_t txdata_octets;
 786         uint64_t rxdata_octets;
 787
 788         /* xmit pdus */
 789         uint32_t noptx_pdus;
 790         uint32_t scsicmd_pdus;
 791         uint32_t tmfcmd_pdus;
 792         uint32_t login_pdus;
 793         uint32_t text_pdus;
 794         uint32_t dataout_pdus;
 795         uint32_t logout_pdus;
 796         uint32_t snack_pdus;
 797
 798         /* recv pdus */
 799         uint32_t noprx_pdus;
 800         uint32_t scsirsp_pdus;
 801         uint32_t tmfrsp_pdus;
 802         uint32_t textrsp_pdus;
 803         uint32_t datain_pdus;
 804         uint32_t logoutrsp_pdus;
 805         uint32_t r2t_pdus;
 806         uint32_t async_pdus;
 807         uint32_t rjt_pdus;
 808
 809         /* errors */
 810         uint32_t digest_err;
 811         uint32_t timeout_err;
 812
 813         /*
 814          * iSCSI Custom Statistics support, i.e. Transport could
 815          * extend existing MIB statistics with its own specific statistics
 816          * up to ISCSI_STATS_CUSTOM_MAX
 817          */
 818         uint32_t custom_length;
 819         struct iscsi_stats_custom custom[]
 820                 __attribute__ ((aligned (sizeof(uint64_t))));
 821 };
 822
 823 enum chap_type_e {
 824         CHAP_TYPE_OUT,
 825         CHAP_TYPE_IN,
 826 };
 827
 828 enum iscsi_chap_param {
 829         ISCSI_CHAP_PARAM_INDEX,
 830         ISCSI_CHAP_PARAM_CHAP_TYPE,
 831         ISCSI_CHAP_PARAM_USERNAME,
 832         ISCSI_CHAP_PARAM_PASSWORD,
 833         ISCSI_CHAP_PARAM_PASSWORD_LEN
 834 };
 835
 836 #define ISCSI_CHAP_AUTH_NAME_MAX_LEN    256
 837 #define ISCSI_CHAP_AUTH_SECRET_MAX_LEN  256
 838 struct iscsi_chap_rec {
 839         uint16_t chap_tbl_idx;
 840         enum chap_type_e chap_type;
 841         char username[ISCSI_CHAP_AUTH_NAME_MAX_LEN];
 842         uint8_t password[ISCSI_CHAP_AUTH_SECRET_MAX_LEN];
 843         uint8_t password_length;
 844 };
 845
 846 #define ISCSI_HOST_STATS_CUSTOM_MAX             32
 847 #define ISCSI_HOST_STATS_CUSTOM_DESC_MAX        64
 848 struct iscsi_host_stats_custom {
 849         char desc[ISCSI_HOST_STATS_CUSTOM_DESC_MAX];
 850         uint64_t value;
 851 };
 852
 853 /* struct iscsi_offload_host_stats: Host statistics,
 854  * Include statistics for MAC, IP, TCP & iSCSI.
 855  */
 856 struct iscsi_offload_host_stats {
 857         /* MAC */
 858         uint64_t mactx_frames;
 859         uint64_t mactx_bytes;
 860         uint64_t mactx_multicast_frames;
 861         uint64_t mactx_broadcast_frames;
 862         uint64_t mactx_pause_frames;
 863         uint64_t mactx_control_frames;
 864         uint64_t mactx_deferral;
 865         uint64_t mactx_excess_deferral;
 866         uint64_t mactx_late_collision;
 867         uint64_t mactx_abort;
 868         uint64_t mactx_single_collision;
 869         uint64_t mactx_multiple_collision;
 870         uint64_t mactx_collision;
 871         uint64_t mactx_frames_dropped;
 872         uint64_t mactx_jumbo_frames;
 873         uint64_t macrx_frames;
 874         uint64_t macrx_bytes;
 875         uint64_t macrx_unknown_control_frames;
 876         uint64_t macrx_pause_frames;
 877         uint64_t macrx_control_frames;
 878         uint64_t macrx_dribble;
 879         uint64_t macrx_frame_length_error;
 880         uint64_t macrx_jabber;
 881         uint64_t macrx_carrier_sense_error;
 882         uint64_t macrx_frame_discarded;
 883         uint64_t macrx_frames_dropped;
 884         uint64_t mac_crc_error;
 885         uint64_t mac_encoding_error;
 886         uint64_t macrx_length_error_large;
 887         uint64_t macrx_length_error_small;
 888         uint64_t macrx_multicast_frames;
 889         uint64_t macrx_broadcast_frames;
 890         /* IP */
 891         uint64_t iptx_packets;
 892         uint64_t iptx_bytes;
 893         uint64_t iptx_fragments;
 894         uint64_t iprx_packets;
 895         uint64_t iprx_bytes;
 896         uint64_t iprx_fragments;
 897         uint64_t ip_datagram_reassembly;
 898         uint64_t ip_invalid_address_error;
 899         uint64_t ip_error_packets;
 900         uint64_t ip_fragrx_overlap;
 901         uint64_t ip_fragrx_outoforder;
 902         uint64_t ip_datagram_reassembly_timeout;
 903         uint64_t ipv6tx_packets;
 904         uint64_t ipv6tx_bytes;
 905         uint64_t ipv6tx_fragments;
 906         uint64_t ipv6rx_packets;
 907         uint64_t ipv6rx_bytes;
 908         uint64_t ipv6rx_fragments;
 909         uint64_t ipv6_datagram_reassembly;
 910         uint64_t ipv6_invalid_address_error;
 911         uint64_t ipv6_error_packets;
 912         uint64_t ipv6_fragrx_overlap;
 913         uint64_t ipv6_fragrx_outoforder;
 914         uint64_t ipv6_datagram_reassembly_timeout;
 915         /* TCP */
 916         uint64_t tcptx_segments;
 917         uint64_t tcptx_bytes;
 918         uint64_t tcprx_segments;
 919         uint64_t tcprx_byte;
 920         uint64_t tcp_duplicate_ack_retx;
 921         uint64_t tcp_retx_timer_expired;
 922         uint64_t tcprx_duplicate_ack;
 923         uint64_t tcprx_pure_ackr;
 924         uint64_t tcptx_delayed_ack;
 925         uint64_t tcptx_pure_ack;
 926         uint64_t tcprx_segment_error;
 927         uint64_t tcprx_segment_outoforder;
 928         uint64_t tcprx_window_probe;
 929         uint64_t tcprx_window_update;
 930         uint64_t tcptx_window_probe_persist;
 931         /* ECC */
 932         uint64_t ecc_error_correction;
 933         /* iSCSI */
 934         uint64_t iscsi_pdu_tx;
 935         uint64_t iscsi_data_bytes_tx;
 936         uint64_t iscsi_pdu_rx;
 937         uint64_t iscsi_data_bytes_rx;
 938         uint64_t iscsi_io_completed;
 939         uint64_t iscsi_unexpected_io_rx;
 940         uint64_t iscsi_format_error;
 941         uint64_t iscsi_hdr_digest_error;
 942         uint64_t iscsi_data_digest_error;
 943         uint64_t iscsi_sequence_error;
 944         /*
 945          * iSCSI Custom Host Statistics support, i.e. Transport could
 946          * extend existing host statistics with its own specific statistics
 947          * up to ISCSI_HOST_STATS_CUSTOM_MAX
 948          */
 949         uint32_t custom_length;
 950         struct iscsi_host_stats_custom custom[]
 951                 __aligned(sizeof(uint64_t));
 952 };
 953
 954 #endif