336 lines
9.1 KiB
C
336 lines
9.1 KiB
C
/*
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* iSCSI User/Kernel Shares (Defines, Constants, Protocol definitions, etc)
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*
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* Copyright (C) 2005 Dmitry Yusupov
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* Copyright (C) 2005 Alex Aizman
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* maintained by open-iscsi@googlegroups.com
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published
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* by the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* See the file COPYING included with this distribution for more details.
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*/
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#ifndef ISCSI_IF_H
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#define ISCSI_IF_H
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#include <scsi/iscsi_proto.h>
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#define UEVENT_BASE 10
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#define KEVENT_BASE 100
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#define ISCSI_ERR_BASE 1000
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enum iscsi_uevent_e {
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ISCSI_UEVENT_UNKNOWN = 0,
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/* down events */
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ISCSI_UEVENT_CREATE_SESSION = UEVENT_BASE + 1,
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ISCSI_UEVENT_DESTROY_SESSION = UEVENT_BASE + 2,
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ISCSI_UEVENT_CREATE_CONN = UEVENT_BASE + 3,
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ISCSI_UEVENT_DESTROY_CONN = UEVENT_BASE + 4,
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ISCSI_UEVENT_BIND_CONN = UEVENT_BASE + 5,
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ISCSI_UEVENT_SET_PARAM = UEVENT_BASE + 6,
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ISCSI_UEVENT_START_CONN = UEVENT_BASE + 7,
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ISCSI_UEVENT_STOP_CONN = UEVENT_BASE + 8,
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ISCSI_UEVENT_SEND_PDU = UEVENT_BASE + 9,
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ISCSI_UEVENT_GET_STATS = UEVENT_BASE + 10,
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ISCSI_UEVENT_GET_PARAM = UEVENT_BASE + 11,
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ISCSI_UEVENT_TRANSPORT_EP_CONNECT = UEVENT_BASE + 12,
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ISCSI_UEVENT_TRANSPORT_EP_POLL = UEVENT_BASE + 13,
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ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT = UEVENT_BASE + 14,
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ISCSI_UEVENT_TGT_DSCVR = UEVENT_BASE + 15,
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/* up events */
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ISCSI_KEVENT_RECV_PDU = KEVENT_BASE + 1,
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ISCSI_KEVENT_CONN_ERROR = KEVENT_BASE + 2,
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ISCSI_KEVENT_IF_ERROR = KEVENT_BASE + 3,
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ISCSI_KEVENT_DESTROY_SESSION = KEVENT_BASE + 4,
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};
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enum iscsi_tgt_dscvr {
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ISCSI_TGT_DSCVR_SEND_TARGETS = 1,
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ISCSI_TGT_DSCVR_ISNS = 2,
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ISCSI_TGT_DSCVR_SLP = 3,
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};
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struct iscsi_uevent {
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uint32_t type; /* k/u events type */
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uint32_t iferror; /* carries interface or resource errors */
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uint64_t transport_handle;
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union {
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/* messages u -> k */
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struct msg_create_session {
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uint32_t initial_cmdsn;
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} c_session;
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struct msg_destroy_session {
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uint32_t sid;
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} d_session;
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struct msg_create_conn {
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uint32_t sid;
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uint32_t cid;
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} c_conn;
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struct msg_bind_conn {
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uint32_t sid;
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uint32_t cid;
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uint64_t transport_eph;
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uint32_t is_leading;
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} b_conn;
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struct msg_destroy_conn {
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uint32_t sid;
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uint32_t cid;
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} d_conn;
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struct msg_send_pdu {
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uint32_t sid;
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uint32_t cid;
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uint32_t hdr_size;
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uint32_t data_size;
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} send_pdu;
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struct msg_set_param {
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uint32_t sid;
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uint32_t cid;
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uint32_t param; /* enum iscsi_param */
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uint32_t len;
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} set_param;
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struct msg_start_conn {
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uint32_t sid;
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uint32_t cid;
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} start_conn;
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struct msg_stop_conn {
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uint32_t sid;
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uint32_t cid;
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uint64_t conn_handle;
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uint32_t flag;
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} stop_conn;
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struct msg_get_stats {
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uint32_t sid;
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uint32_t cid;
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} get_stats;
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struct msg_transport_connect {
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uint32_t non_blocking;
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} ep_connect;
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struct msg_transport_poll {
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uint64_t ep_handle;
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uint32_t timeout_ms;
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} ep_poll;
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struct msg_transport_disconnect {
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uint64_t ep_handle;
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} ep_disconnect;
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struct msg_tgt_dscvr {
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enum iscsi_tgt_dscvr type;
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uint32_t host_no;
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/*
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* enable = 1 to establish a new connection
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* with the server. enable = 0 to disconnect
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* from the server. Used primarily to switch
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* from one iSNS server to another.
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*/
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uint32_t enable;
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} tgt_dscvr;
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} u;
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union {
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/* messages k -> u */
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int retcode;
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struct msg_create_session_ret {
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uint32_t sid;
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uint32_t host_no;
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} c_session_ret;
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struct msg_create_conn_ret {
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uint32_t sid;
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uint32_t cid;
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} c_conn_ret;
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struct msg_recv_req {
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uint32_t sid;
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uint32_t cid;
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uint64_t recv_handle;
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} recv_req;
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struct msg_conn_error {
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uint32_t sid;
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uint32_t cid;
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uint32_t error; /* enum iscsi_err */
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} connerror;
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struct msg_session_destroyed {
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uint32_t host_no;
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uint32_t sid;
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} d_session;
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struct msg_transport_connect_ret {
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uint64_t handle;
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} ep_connect_ret;
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} r;
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} __attribute__ ((aligned (sizeof(uint64_t))));
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/*
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* Common error codes
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*/
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enum iscsi_err {
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ISCSI_OK = 0,
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ISCSI_ERR_DATASN = ISCSI_ERR_BASE + 1,
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ISCSI_ERR_DATA_OFFSET = ISCSI_ERR_BASE + 2,
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ISCSI_ERR_MAX_CMDSN = ISCSI_ERR_BASE + 3,
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ISCSI_ERR_EXP_CMDSN = ISCSI_ERR_BASE + 4,
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ISCSI_ERR_BAD_OPCODE = ISCSI_ERR_BASE + 5,
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ISCSI_ERR_DATALEN = ISCSI_ERR_BASE + 6,
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ISCSI_ERR_AHSLEN = ISCSI_ERR_BASE + 7,
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ISCSI_ERR_PROTO = ISCSI_ERR_BASE + 8,
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ISCSI_ERR_LUN = ISCSI_ERR_BASE + 9,
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ISCSI_ERR_BAD_ITT = ISCSI_ERR_BASE + 10,
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ISCSI_ERR_CONN_FAILED = ISCSI_ERR_BASE + 11,
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ISCSI_ERR_R2TSN = ISCSI_ERR_BASE + 12,
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ISCSI_ERR_SESSION_FAILED = ISCSI_ERR_BASE + 13,
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ISCSI_ERR_HDR_DGST = ISCSI_ERR_BASE + 14,
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ISCSI_ERR_DATA_DGST = ISCSI_ERR_BASE + 15,
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ISCSI_ERR_PARAM_NOT_FOUND = ISCSI_ERR_BASE + 16,
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ISCSI_ERR_NO_SCSI_CMD = ISCSI_ERR_BASE + 17,
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};
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/*
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* iSCSI Parameters (RFC3720)
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*/
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enum iscsi_param {
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/* passed in using netlink set param */
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ISCSI_PARAM_MAX_RECV_DLENGTH,
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ISCSI_PARAM_MAX_XMIT_DLENGTH,
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ISCSI_PARAM_HDRDGST_EN,
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ISCSI_PARAM_DATADGST_EN,
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ISCSI_PARAM_INITIAL_R2T_EN,
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ISCSI_PARAM_MAX_R2T,
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ISCSI_PARAM_IMM_DATA_EN,
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ISCSI_PARAM_FIRST_BURST,
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ISCSI_PARAM_MAX_BURST,
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ISCSI_PARAM_PDU_INORDER_EN,
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ISCSI_PARAM_DATASEQ_INORDER_EN,
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ISCSI_PARAM_ERL,
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ISCSI_PARAM_IFMARKER_EN,
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ISCSI_PARAM_OFMARKER_EN,
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ISCSI_PARAM_EXP_STATSN,
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ISCSI_PARAM_TARGET_NAME,
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ISCSI_PARAM_TPGT,
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ISCSI_PARAM_PERSISTENT_ADDRESS,
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ISCSI_PARAM_PERSISTENT_PORT,
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ISCSI_PARAM_SESS_RECOVERY_TMO,
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/* pased in through bind conn using transport_fd */
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ISCSI_PARAM_CONN_PORT,
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ISCSI_PARAM_CONN_ADDRESS,
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/* must always be last */
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ISCSI_PARAM_MAX,
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};
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#define ISCSI_MAX_RECV_DLENGTH (1 << ISCSI_PARAM_MAX_RECV_DLENGTH)
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#define ISCSI_MAX_XMIT_DLENGTH (1 << ISCSI_PARAM_MAX_XMIT_DLENGTH)
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#define ISCSI_HDRDGST_EN (1 << ISCSI_PARAM_HDRDGST_EN)
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#define ISCSI_DATADGST_EN (1 << ISCSI_PARAM_DATADGST_EN)
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#define ISCSI_INITIAL_R2T_EN (1 << ISCSI_PARAM_INITIAL_R2T_EN)
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#define ISCSI_MAX_R2T (1 << ISCSI_PARAM_MAX_R2T)
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#define ISCSI_IMM_DATA_EN (1 << ISCSI_PARAM_IMM_DATA_EN)
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#define ISCSI_FIRST_BURST (1 << ISCSI_PARAM_FIRST_BURST)
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#define ISCSI_MAX_BURST (1 << ISCSI_PARAM_MAX_BURST)
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#define ISCSI_PDU_INORDER_EN (1 << ISCSI_PARAM_PDU_INORDER_EN)
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#define ISCSI_DATASEQ_INORDER_EN (1 << ISCSI_PARAM_DATASEQ_INORDER_EN)
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#define ISCSI_ERL (1 << ISCSI_PARAM_ERL)
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#define ISCSI_IFMARKER_EN (1 << ISCSI_PARAM_IFMARKER_EN)
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#define ISCSI_OFMARKER_EN (1 << ISCSI_PARAM_OFMARKER_EN)
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#define ISCSI_EXP_STATSN (1 << ISCSI_PARAM_EXP_STATSN)
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#define ISCSI_TARGET_NAME (1 << ISCSI_PARAM_TARGET_NAME)
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#define ISCSI_TPGT (1 << ISCSI_PARAM_TPGT)
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#define ISCSI_PERSISTENT_ADDRESS (1 << ISCSI_PARAM_PERSISTENT_ADDRESS)
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#define ISCSI_PERSISTENT_PORT (1 << ISCSI_PARAM_PERSISTENT_PORT)
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#define ISCSI_SESS_RECOVERY_TMO (1 << ISCSI_PARAM_SESS_RECOVERY_TMO)
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#define ISCSI_CONN_PORT (1 << ISCSI_PARAM_CONN_PORT)
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#define ISCSI_CONN_ADDRESS (1 << ISCSI_PARAM_CONN_ADDRESS)
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#define iscsi_ptr(_handle) ((void*)(unsigned long)_handle)
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#define iscsi_handle(_ptr) ((uint64_t)(unsigned long)_ptr)
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#define hostdata_session(_hostdata) (iscsi_ptr(*(unsigned long *)_hostdata))
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/**
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* iscsi_hostdata - get LLD hostdata from scsi_host
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* @_hostdata: pointer to scsi host's hostdata
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**/
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#define iscsi_hostdata(_hostdata) ((void*)_hostdata + sizeof(unsigned long))
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/*
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* These flags presents iSCSI Data-Path capabilities.
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*/
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#define CAP_RECOVERY_L0 0x1
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#define CAP_RECOVERY_L1 0x2
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#define CAP_RECOVERY_L2 0x4
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#define CAP_MULTI_R2T 0x8
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#define CAP_HDRDGST 0x10
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#define CAP_DATADGST 0x20
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#define CAP_MULTI_CONN 0x40
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#define CAP_TEXT_NEGO 0x80
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#define CAP_MARKERS 0x100
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/*
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* These flags describes reason of stop_conn() call
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*/
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#define STOP_CONN_TERM 0x1
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#define STOP_CONN_SUSPEND 0x2
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#define STOP_CONN_RECOVER 0x3
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#define ISCSI_STATS_CUSTOM_MAX 32
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#define ISCSI_STATS_CUSTOM_DESC_MAX 64
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struct iscsi_stats_custom {
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char desc[ISCSI_STATS_CUSTOM_DESC_MAX];
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uint64_t value;
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};
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/*
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* struct iscsi_stats - iSCSI Statistics (iSCSI MIB)
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*
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* Note: this structure contains counters collected on per-connection basis.
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*/
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struct iscsi_stats {
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/* octets */
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uint64_t txdata_octets;
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uint64_t rxdata_octets;
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/* xmit pdus */
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uint32_t noptx_pdus;
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uint32_t scsicmd_pdus;
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uint32_t tmfcmd_pdus;
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uint32_t login_pdus;
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uint32_t text_pdus;
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uint32_t dataout_pdus;
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uint32_t logout_pdus;
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uint32_t snack_pdus;
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/* recv pdus */
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uint32_t noprx_pdus;
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uint32_t scsirsp_pdus;
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uint32_t tmfrsp_pdus;
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uint32_t textrsp_pdus;
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uint32_t datain_pdus;
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uint32_t logoutrsp_pdus;
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uint32_t r2t_pdus;
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uint32_t async_pdus;
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uint32_t rjt_pdus;
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/* errors */
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uint32_t digest_err;
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uint32_t timeout_err;
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/*
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* iSCSI Custom Statistics support, i.e. Transport could
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* extend existing MIB statistics with its own specific statistics
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* up to ISCSI_STATS_CUSTOM_MAX
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*/
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uint32_t custom_length;
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struct iscsi_stats_custom custom[0]
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__attribute__ ((aligned (sizeof(uint64_t))));
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};
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#endif
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