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
  26 #define UEVENT_BASE                     10
  27 #define KEVENT_BASE                     100
  28 #define ISCSI_ERR_BASE                  1000
  29
  30 enum iscsi_uevent_e {
  31         ISCSI_UEVENT_UNKNOWN            = 0,
  32
  33         /* down events */
  34         ISCSI_UEVENT_CREATE_SESSION     = UEVENT_BASE + 1,
  35         ISCSI_UEVENT_DESTROY_SESSION    = UEVENT_BASE + 2,
  36         ISCSI_UEVENT_CREATE_CONN        = UEVENT_BASE + 3,
  37         ISCSI_UEVENT_DESTROY_CONN       = UEVENT_BASE + 4,
  38         ISCSI_UEVENT_BIND_CONN          = UEVENT_BASE + 5,
  39         ISCSI_UEVENT_SET_PARAM          = UEVENT_BASE + 6,
  40         ISCSI_UEVENT_START_CONN         = UEVENT_BASE + 7,
  41         ISCSI_UEVENT_STOP_CONN          = UEVENT_BASE + 8,
  42         ISCSI_UEVENT_SEND_PDU           = UEVENT_BASE + 9,
  43         ISCSI_UEVENT_GET_STATS          = UEVENT_BASE + 10,
  44         ISCSI_UEVENT_GET_PARAM          = UEVENT_BASE + 11,
  45
  46         ISCSI_UEVENT_TRANSPORT_EP_CONNECT       = UEVENT_BASE + 12,
  47         ISCSI_UEVENT_TRANSPORT_EP_POLL          = UEVENT_BASE + 13,
  48         ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT    = UEVENT_BASE + 14,
  49
  50         ISCSI_UEVENT_TGT_DSCVR          = UEVENT_BASE + 15,
  51         ISCSI_UEVENT_SET_HOST_PARAM     = UEVENT_BASE + 16,
  52         ISCSI_UEVENT_UNBIND_SESSION     = UEVENT_BASE + 17,
  53
  54         /* up events */
  55         ISCSI_KEVENT_RECV_PDU           = KEVENT_BASE + 1,
  56         ISCSI_KEVENT_CONN_ERROR         = KEVENT_BASE + 2,
  57         ISCSI_KEVENT_IF_ERROR           = KEVENT_BASE + 3,
  58         ISCSI_KEVENT_DESTROY_SESSION    = KEVENT_BASE + 4,
  59         ISCSI_KEVENT_UNBIND_SESSION     = KEVENT_BASE + 5,
  60         ISCSI_KEVENT_CREATE_SESSION     = KEVENT_BASE + 6,
  61 };
  62
  63 enum iscsi_tgt_dscvr {
  64         ISCSI_TGT_DSCVR_SEND_TARGETS    = 1,
  65         ISCSI_TGT_DSCVR_ISNS            = 2,
  66         ISCSI_TGT_DSCVR_SLP             = 3,
  67 };
  68
  69 struct iscsi_uevent {
  70         uint32_t type; /* k/u events type */
  71         uint32_t iferror; /* carries interface or resource errors */
  72         uint64_t transport_handle;
  73
  74         union {
  75                 /* messages u -> k */
  76                 struct msg_create_session {
  77                         uint32_t        initial_cmdsn;
  78                         uint16_t        cmds_max;
  79                         uint16_t        queue_depth;
  80                 } c_session;
  81                 struct msg_destroy_session {
  82                         uint32_t        sid;
  83                 } d_session;
  84                 struct msg_create_conn {
  85                         uint32_t        sid;
  86                         uint32_t        cid;
  87                 } c_conn;
  88                 struct msg_bind_conn {
  89                         uint32_t        sid;
  90                         uint32_t        cid;
  91                         uint64_t        transport_eph;
  92                         uint32_t        is_leading;
  93                 } b_conn;
  94                 struct msg_destroy_conn {
  95                         uint32_t        sid;
  96                         uint32_t        cid;
  97                 } d_conn;
  98                 struct msg_send_pdu {
  99                         uint32_t        sid;
 100                         uint32_t        cid;
 101                         uint32_t        hdr_size;
 102                         uint32_t        data_size;
 103                 } send_pdu;
 104                 struct msg_set_param {
 105                         uint32_t        sid;
 106                         uint32_t        cid;
 107                         uint32_t        param; /* enum iscsi_param */
 108                         uint32_t        len;
 109                 } set_param;
 110                 struct msg_start_conn {
 111                         uint32_t        sid;
 112                         uint32_t        cid;
 113                 } start_conn;
 114                 struct msg_stop_conn {
 115                         uint32_t        sid;
 116                         uint32_t        cid;
 117                         uint64_t        conn_handle;
 118                         uint32_t        flag;
 119                 } stop_conn;
 120                 struct msg_get_stats {
 121                         uint32_t        sid;
 122                         uint32_t        cid;
 123                 } get_stats;
 124                 struct msg_transport_connect {
 125                         uint32_t        non_blocking;
 126                 } ep_connect;
 127                 struct msg_transport_poll {
 128                         uint64_t        ep_handle;
 129                         uint32_t        timeout_ms;
 130                 } ep_poll;
 131                 struct msg_transport_disconnect {
 132                         uint64_t        ep_handle;
 133                 } ep_disconnect;
 134                 struct msg_tgt_dscvr {
 135                         enum iscsi_tgt_dscvr    type;
 136                         uint32_t        host_no;
 137                         /*
 138                          * enable = 1 to establish a new connection
 139                          * with the server. enable = 0 to disconnect
 140                          * from the server. Used primarily to switch
 141                          * from one iSNS server to another.
 142                          */
 143                         uint32_t        enable;
 144                 } tgt_dscvr;
 145                 struct msg_set_host_param {
 146                         uint32_t        host_no;
 147                         uint32_t        param; /* enum iscsi_host_param */
 148                         uint32_t        len;
 149                 } set_host_param;
 150         } u;
 151         union {
 152                 /* messages k -> u */
 153                 int                     retcode;
 154                 struct msg_create_session_ret {
 155                         uint32_t        sid;
 156                         uint32_t        host_no;
 157                 } c_session_ret;
 158                 struct msg_create_conn_ret {
 159                         uint32_t        sid;
 160                         uint32_t        cid;
 161                 } c_conn_ret;
 162                 struct msg_unbind_session {
 163                         uint32_t        sid;
 164                         uint32_t        host_no;
 165                 } unbind_session;
 166                 struct msg_recv_req {
 167                         uint32_t        sid;
 168                         uint32_t        cid;
 169                         uint64_t        recv_handle;
 170                 } recv_req;
 171                 struct msg_conn_error {
 172                         uint32_t        sid;
 173                         uint32_t        cid;
 174                         uint32_t        error; /* enum iscsi_err */
 175                 } connerror;
 176                 struct msg_session_destroyed {
 177                         uint32_t        host_no;
 178                         uint32_t        sid;
 179                 } d_session;
 180                 struct msg_transport_connect_ret {
 181                         uint64_t        handle;
 182                 } ep_connect_ret;
 183         } r;
 184 } __attribute__ ((aligned (sizeof(uint64_t))));
 185
 186 /*
 187  * Common error codes
 188  */
 189 enum iscsi_err {
 190         ISCSI_OK                        = 0,
 191
 192         ISCSI_ERR_DATASN                = ISCSI_ERR_BASE + 1,
 193         ISCSI_ERR_DATA_OFFSET           = ISCSI_ERR_BASE + 2,
 194         ISCSI_ERR_MAX_CMDSN             = ISCSI_ERR_BASE + 3,
 195         ISCSI_ERR_EXP_CMDSN             = ISCSI_ERR_BASE + 4,
 196         ISCSI_ERR_BAD_OPCODE            = ISCSI_ERR_BASE + 5,
 197         ISCSI_ERR_DATALEN               = ISCSI_ERR_BASE + 6,
 198         ISCSI_ERR_AHSLEN                = ISCSI_ERR_BASE + 7,
 199         ISCSI_ERR_PROTO                 = ISCSI_ERR_BASE + 8,
 200         ISCSI_ERR_LUN                   = ISCSI_ERR_BASE + 9,
 201         ISCSI_ERR_BAD_ITT               = ISCSI_ERR_BASE + 10,
 202         ISCSI_ERR_CONN_FAILED           = ISCSI_ERR_BASE + 11,
 203         ISCSI_ERR_R2TSN                 = ISCSI_ERR_BASE + 12,
 204         ISCSI_ERR_SESSION_FAILED        = ISCSI_ERR_BASE + 13,
 205         ISCSI_ERR_HDR_DGST              = ISCSI_ERR_BASE + 14,
 206         ISCSI_ERR_DATA_DGST             = ISCSI_ERR_BASE + 15,
 207         ISCSI_ERR_PARAM_NOT_FOUND       = ISCSI_ERR_BASE + 16,
 208         ISCSI_ERR_NO_SCSI_CMD           = ISCSI_ERR_BASE + 17,
 209 };
 210
 211 /*
 212  * iSCSI Parameters (RFC3720)
 213  */
 214 enum iscsi_param {
 215         /* passed in using netlink set param */
 216         ISCSI_PARAM_MAX_RECV_DLENGTH,
 217         ISCSI_PARAM_MAX_XMIT_DLENGTH,
 218         ISCSI_PARAM_HDRDGST_EN,
 219         ISCSI_PARAM_DATADGST_EN,
 220         ISCSI_PARAM_INITIAL_R2T_EN,
 221         ISCSI_PARAM_MAX_R2T,
 222         ISCSI_PARAM_IMM_DATA_EN,
 223         ISCSI_PARAM_FIRST_BURST,
 224         ISCSI_PARAM_MAX_BURST,
 225         ISCSI_PARAM_PDU_INORDER_EN,
 226         ISCSI_PARAM_DATASEQ_INORDER_EN,
 227         ISCSI_PARAM_ERL,
 228         ISCSI_PARAM_IFMARKER_EN,
 229         ISCSI_PARAM_OFMARKER_EN,
 230         ISCSI_PARAM_EXP_STATSN,
 231         ISCSI_PARAM_TARGET_NAME,
 232         ISCSI_PARAM_TPGT,
 233         ISCSI_PARAM_PERSISTENT_ADDRESS,
 234         ISCSI_PARAM_PERSISTENT_PORT,
 235         ISCSI_PARAM_SESS_RECOVERY_TMO,
 236
 237         /* pased in through bind conn using transport_fd */
 238         ISCSI_PARAM_CONN_PORT,
 239         ISCSI_PARAM_CONN_ADDRESS,
 240
 241         ISCSI_PARAM_USERNAME,
 242         ISCSI_PARAM_USERNAME_IN,
 243         ISCSI_PARAM_PASSWORD,
 244         ISCSI_PARAM_PASSWORD_IN,
 245
 246         ISCSI_PARAM_FAST_ABORT,
 247         ISCSI_PARAM_ABORT_TMO,
 248         ISCSI_PARAM_LU_RESET_TMO,
 249         ISCSI_PARAM_HOST_RESET_TMO,
 250
 251         ISCSI_PARAM_PING_TMO,
 252         ISCSI_PARAM_RECV_TMO,
 253         /* must always be last */
 254         ISCSI_PARAM_MAX,
 255 };
 256
 257 #define ISCSI_MAX_RECV_DLENGTH          (1 << ISCSI_PARAM_MAX_RECV_DLENGTH)
 258 #define ISCSI_MAX_XMIT_DLENGTH          (1 << ISCSI_PARAM_MAX_XMIT_DLENGTH)
 259 #define ISCSI_HDRDGST_EN                (1 << ISCSI_PARAM_HDRDGST_EN)
 260 #define ISCSI_DATADGST_EN               (1 << ISCSI_PARAM_DATADGST_EN)
 261 #define ISCSI_INITIAL_R2T_EN            (1 << ISCSI_PARAM_INITIAL_R2T_EN)
 262 #define ISCSI_MAX_R2T                   (1 << ISCSI_PARAM_MAX_R2T)
 263 #define ISCSI_IMM_DATA_EN               (1 << ISCSI_PARAM_IMM_DATA_EN)
 264 #define ISCSI_FIRST_BURST               (1 << ISCSI_PARAM_FIRST_BURST)
 265 #define ISCSI_MAX_BURST                 (1 << ISCSI_PARAM_MAX_BURST)
 266 #define ISCSI_PDU_INORDER_EN            (1 << ISCSI_PARAM_PDU_INORDER_EN)
 267 #define ISCSI_DATASEQ_INORDER_EN        (1 << ISCSI_PARAM_DATASEQ_INORDER_EN)
 268 #define ISCSI_ERL                       (1 << ISCSI_PARAM_ERL)
 269 #define ISCSI_IFMARKER_EN               (1 << ISCSI_PARAM_IFMARKER_EN)
 270 #define ISCSI_OFMARKER_EN               (1 << ISCSI_PARAM_OFMARKER_EN)
 271 #define ISCSI_EXP_STATSN                (1 << ISCSI_PARAM_EXP_STATSN)
 272 #define ISCSI_TARGET_NAME               (1 << ISCSI_PARAM_TARGET_NAME)
 273 #define ISCSI_TPGT                      (1 << ISCSI_PARAM_TPGT)
 274 #define ISCSI_PERSISTENT_ADDRESS        (1 << ISCSI_PARAM_PERSISTENT_ADDRESS)
 275 #define ISCSI_PERSISTENT_PORT           (1 << ISCSI_PARAM_PERSISTENT_PORT)
 276 #define ISCSI_SESS_RECOVERY_TMO         (1 << ISCSI_PARAM_SESS_RECOVERY_TMO)
 277 #define ISCSI_CONN_PORT                 (1 << ISCSI_PARAM_CONN_PORT)
 278 #define ISCSI_CONN_ADDRESS              (1 << ISCSI_PARAM_CONN_ADDRESS)
 279 #define ISCSI_USERNAME                  (1 << ISCSI_PARAM_USERNAME)
 280 #define ISCSI_USERNAME_IN               (1 << ISCSI_PARAM_USERNAME_IN)
 281 #define ISCSI_PASSWORD                  (1 << ISCSI_PARAM_PASSWORD)
 282 #define ISCSI_PASSWORD_IN               (1 << ISCSI_PARAM_PASSWORD_IN)
 283 #define ISCSI_FAST_ABORT                (1 << ISCSI_PARAM_FAST_ABORT)
 284 #define ISCSI_ABORT_TMO                 (1 << ISCSI_PARAM_ABORT_TMO)
 285 #define ISCSI_LU_RESET_TMO              (1 << ISCSI_PARAM_LU_RESET_TMO)
 286 #define ISCSI_HOST_RESET_TMO            (1 << ISCSI_PARAM_HOST_RESET_TMO)
 287 #define ISCSI_PING_TMO                  (1 << ISCSI_PARAM_PING_TMO)
 288 #define ISCSI_RECV_TMO                  (1 << ISCSI_PARAM_RECV_TMO)
 289
 290 /* iSCSI HBA params */
 291 enum iscsi_host_param {
 292         ISCSI_HOST_PARAM_HWADDRESS,
 293         ISCSI_HOST_PARAM_INITIATOR_NAME,
 294         ISCSI_HOST_PARAM_NETDEV_NAME,
 295         ISCSI_HOST_PARAM_IPADDRESS,
 296         ISCSI_HOST_PARAM_MAX,
 297 };
 298
 299 #define ISCSI_HOST_HWADDRESS            (1 << ISCSI_HOST_PARAM_HWADDRESS)
 300 #define ISCSI_HOST_INITIATOR_NAME       (1 << ISCSI_HOST_PARAM_INITIATOR_NAME)
 301 #define ISCSI_HOST_NETDEV_NAME          (1 << ISCSI_HOST_PARAM_NETDEV_NAME)
 302 #define ISCSI_HOST_IPADDRESS            (1 << ISCSI_HOST_PARAM_IPADDRESS)
 303
 304 #define iscsi_ptr(_handle) ((void*)(unsigned long)_handle)
 305 #define iscsi_handle(_ptr) ((uint64_t)(unsigned long)_ptr)
 306 #define hostdata_session(_hostdata) (iscsi_ptr(*(unsigned long *)_hostdata))
 307
 308 /**
 309  * iscsi_hostdata - get LLD hostdata from scsi_host
 310  * @_hostdata: pointer to scsi host's hostdata
 311  **/
 312 #define iscsi_hostdata(_hostdata) ((void*)_hostdata + sizeof(unsigned long))
 313
 314 /*
 315  * These flags presents iSCSI Data-Path capabilities.
 316  */
 317 #define CAP_RECOVERY_L0         0x1
 318 #define CAP_RECOVERY_L1         0x2
 319 #define CAP_RECOVERY_L2         0x4
 320 #define CAP_MULTI_R2T           0x8
 321 #define CAP_HDRDGST             0x10
 322 #define CAP_DATADGST            0x20
 323 #define CAP_MULTI_CONN          0x40
 324 #define CAP_TEXT_NEGO           0x80
 325 #define CAP_MARKERS             0x100
 326 #define CAP_FW_DB               0x200
 327 #define CAP_SENDTARGETS_OFFLOAD 0x400
 328 #define CAP_DATA_PATH_OFFLOAD   0x800
 329
 330 /*
 331  * These flags describes reason of stop_conn() call
 332  */
 333 #define STOP_CONN_TERM          0x1
 334 #define STOP_CONN_SUSPEND       0x2
 335 #define STOP_CONN_RECOVER       0x3
 336
 337 #define ISCSI_STATS_CUSTOM_MAX          32
 338 #define ISCSI_STATS_CUSTOM_DESC_MAX     64
 339 struct iscsi_stats_custom {
 340         char desc[ISCSI_STATS_CUSTOM_DESC_MAX];
 341         uint64_t value;
 342 };
 343
 344 /*
 345  * struct iscsi_stats - iSCSI Statistics (iSCSI MIB)
 346  *
 347  * Note: this structure contains counters collected on per-connection basis.
 348  */
 349 struct iscsi_stats {
 350         /* octets */
 351         uint64_t txdata_octets;
 352         uint64_t rxdata_octets;
 353
 354         /* xmit pdus */
 355         uint32_t noptx_pdus;
 356         uint32_t scsicmd_pdus;
 357         uint32_t tmfcmd_pdus;
 358         uint32_t login_pdus;
 359         uint32_t text_pdus;
 360         uint32_t dataout_pdus;
 361         uint32_t logout_pdus;
 362         uint32_t snack_pdus;
 363
 364         /* recv pdus */
 365         uint32_t noprx_pdus;
 366         uint32_t scsirsp_pdus;
 367         uint32_t tmfrsp_pdus;
 368         uint32_t textrsp_pdus;
 369         uint32_t datain_pdus;
 370         uint32_t logoutrsp_pdus;
 371         uint32_t r2t_pdus;
 372         uint32_t async_pdus;
 373         uint32_t rjt_pdus;
 374
 375         /* errors */
 376         uint32_t digest_err;
 377         uint32_t timeout_err;
 378
 379         /*
 380          * iSCSI Custom Statistics support, i.e. Transport could
 381          * extend existing MIB statistics with its own specific statistics
 382          * up to ISCSI_STATS_CUSTOM_MAX
 383          */
 384         uint32_t custom_length;
 385         struct iscsi_stats_custom custom[0]
 386                 __attribute__ ((aligned (sizeof(uint64_t))));
 387 };
 388
 389 #endif