Merge HEAD from ../scsi-iscsi-2.6

3 files changed, 866 insertions, 147 deletions

diff --git a/include/scsi/iscsi_if.h b/include/scsi/iscsi_if.h
new file mode 100644
index 000000000000..be1bc792ab18
--- /dev/null
+++ b/include/scsi/iscsi_if.h
@@ -0,0 +1,245 @@
+/*
+ * iSCSI User/Kernel Shares (Defines, Constants, Protocol definitions, etc)
+ *
+ * Copyright (C) 2005 Dmitry Yusupov
+ * Copyright (C) 2005 Alex Aizman
+ * maintained by open-iscsi@googlegroups.com
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * See the file COPYING included with this distribution for more details.
+ */
+
+#ifndef ISCSI_IF_H
+#define ISCSI_IF_H
+
+#include <scsi/iscsi_proto.h>
+
+#define UEVENT_BASE                     10
+#define KEVENT_BASE                     100
+#define ISCSI_ERR_BASE                  1000
+
+enum iscsi_uevent_e {
+        ISCSI_UEVENT_UNKNOWN            = 0,
+
+        /* down events */
+        ISCSI_UEVENT_CREATE_SESSION     = UEVENT_BASE + 1,
+        ISCSI_UEVENT_DESTROY_SESSION    = UEVENT_BASE + 2,
+        ISCSI_UEVENT_CREATE_CONN        = UEVENT_BASE + 3,
+        ISCSI_UEVENT_DESTROY_CONN       = UEVENT_BASE + 4,
+        ISCSI_UEVENT_BIND_CONN          = UEVENT_BASE + 5,
+        ISCSI_UEVENT_SET_PARAM          = UEVENT_BASE + 6,
+        ISCSI_UEVENT_START_CONN         = UEVENT_BASE + 7,
+        ISCSI_UEVENT_STOP_CONN          = UEVENT_BASE + 8,
+        ISCSI_UEVENT_SEND_PDU           = UEVENT_BASE + 9,
+        ISCSI_UEVENT_GET_STATS          = UEVENT_BASE + 10,
+        ISCSI_UEVENT_GET_PARAM          = UEVENT_BASE + 11,
+
+        /* up events */
+        ISCSI_KEVENT_RECV_PDU           = KEVENT_BASE + 1,
+        ISCSI_KEVENT_CONN_ERROR         = KEVENT_BASE + 2,
+        ISCSI_KEVENT_IF_ERROR           = KEVENT_BASE + 3,
+};
+
+struct iscsi_uevent {
+        uint32_t type; /* k/u events type */
+        uint32_t iferror; /* carries interface or resource errors */
+        uint64_t transport_handle;
+
+        union {
+                /* messages u -> k */
+                struct msg_create_session {
+                        uint32_t        initial_cmdsn;
+                } c_session;
+                struct msg_destroy_session {
+                        uint64_t        session_handle;
+                        uint32_t        sid;
+                } d_session;
+                struct msg_create_conn {
+                        uint64_t        session_handle;
+                        uint32_t        cid;
+                        uint32_t        sid;
+                } c_conn;
+                struct msg_bind_conn {
+                        uint64_t        session_handle;
+                        uint64_t        conn_handle;
+                        uint32_t        transport_fd;
+                        uint32_t        is_leading;
+                } b_conn;
+                struct msg_destroy_conn {
+                        uint64_t        conn_handle;
+                        uint32_t        cid;
+                } d_conn;
+                struct msg_send_pdu {
+                        uint32_t        hdr_size;
+                        uint32_t        data_size;
+                        uint64_t        conn_handle;
+                } send_pdu;
+                struct msg_set_param {
+                        uint64_t        conn_handle;
+                        uint32_t        param; /* enum iscsi_param */
+                        uint32_t        value;
+                } set_param;
+                struct msg_start_conn {
+                        uint64_t        conn_handle;
+                } start_conn;
+                struct msg_stop_conn {
+                        uint64_t        conn_handle;
+                        uint32_t        flag;
+                } stop_conn;
+                struct msg_get_stats {
+                        uint64_t        conn_handle;
+                } get_stats;
+        } u;
+        union {
+                /* messages k -> u */
+                uint64_t                handle;
+                int                     retcode;
+                struct msg_create_session_ret {
+                        uint64_t        session_handle;
+                        uint32_t        sid;
+                } c_session_ret;
+                struct msg_recv_req {
+                        uint64_t        recv_handle;
+                        uint64_t        conn_handle;
+                } recv_req;
+                struct msg_conn_error {
+                        uint64_t        conn_handle;
+                        uint32_t        error; /* enum iscsi_err */
+                } connerror;
+        } r;
+} __attribute__ ((aligned (sizeof(uint64_t))));
+
+/*
+ * Common error codes
+ */
+enum iscsi_err {
+        ISCSI_OK                        = 0,
+
+        ISCSI_ERR_DATASN                = ISCSI_ERR_BASE + 1,
+        ISCSI_ERR_DATA_OFFSET           = ISCSI_ERR_BASE + 2,
+        ISCSI_ERR_MAX_CMDSN             = ISCSI_ERR_BASE + 3,
+        ISCSI_ERR_EXP_CMDSN             = ISCSI_ERR_BASE + 4,
+        ISCSI_ERR_BAD_OPCODE            = ISCSI_ERR_BASE + 5,
+        ISCSI_ERR_DATALEN               = ISCSI_ERR_BASE + 6,
+        ISCSI_ERR_AHSLEN                = ISCSI_ERR_BASE + 7,
+        ISCSI_ERR_PROTO                 = ISCSI_ERR_BASE + 8,
+        ISCSI_ERR_LUN                   = ISCSI_ERR_BASE + 9,
+        ISCSI_ERR_BAD_ITT               = ISCSI_ERR_BASE + 10,
+        ISCSI_ERR_CONN_FAILED           = ISCSI_ERR_BASE + 11,
+        ISCSI_ERR_R2TSN                 = ISCSI_ERR_BASE + 12,
+        ISCSI_ERR_SESSION_FAILED        = ISCSI_ERR_BASE + 13,
+        ISCSI_ERR_HDR_DGST              = ISCSI_ERR_BASE + 14,
+        ISCSI_ERR_DATA_DGST             = ISCSI_ERR_BASE + 15,
+        ISCSI_ERR_PARAM_NOT_FOUND       = ISCSI_ERR_BASE + 16
+};
+
+/*
+ * iSCSI Parameters (RFC3720)
+ */
+enum iscsi_param {
+        ISCSI_PARAM_MAX_RECV_DLENGTH    = 0,
+        ISCSI_PARAM_MAX_XMIT_DLENGTH    = 1,
+        ISCSI_PARAM_HDRDGST_EN          = 2,
+        ISCSI_PARAM_DATADGST_EN         = 3,
+        ISCSI_PARAM_INITIAL_R2T_EN      = 4,
+        ISCSI_PARAM_MAX_R2T             = 5,
+        ISCSI_PARAM_IMM_DATA_EN         = 6,
+        ISCSI_PARAM_FIRST_BURST         = 7,
+        ISCSI_PARAM_MAX_BURST           = 8,
+        ISCSI_PARAM_PDU_INORDER_EN      = 9,
+        ISCSI_PARAM_DATASEQ_INORDER_EN  = 10,
+        ISCSI_PARAM_ERL                 = 11,
+        ISCSI_PARAM_IFMARKER_EN         = 12,
+        ISCSI_PARAM_OFMARKER_EN         = 13,
+};
+#define ISCSI_PARAM_MAX                 14
+
+typedef uint64_t iscsi_sessionh_t;      /* iSCSI Data-Path session handle */
+typedef uint64_t iscsi_connh_t;         /* iSCSI Data-Path connection handle */
+
+#define iscsi_ptr(_handle) ((void*)(unsigned long)_handle)
+#define iscsi_handle(_ptr) ((uint64_t)(unsigned long)_ptr)
+#define iscsi_hostdata(_hostdata) ((void*)_hostdata + sizeof(unsigned long))
+
+/*
+ * These flags presents iSCSI Data-Path capabilities.
+ */
+#define CAP_RECOVERY_L0         0x1
+#define CAP_RECOVERY_L1         0x2
+#define CAP_RECOVERY_L2         0x4
+#define CAP_MULTI_R2T           0x8
+#define CAP_HDRDGST             0x10
+#define CAP_DATADGST            0x20
+#define CAP_MULTI_CONN          0x40
+#define CAP_TEXT_NEGO           0x80
+#define CAP_MARKERS             0x100
+
+/*
+ * These flags describes reason of stop_conn() call
+ */
+#define STOP_CONN_TERM          0x1
+#define STOP_CONN_SUSPEND       0x2
+#define STOP_CONN_RECOVER       0x3
+
+#define ISCSI_STATS_CUSTOM_MAX          32
+#define ISCSI_STATS_CUSTOM_DESC_MAX     64
+struct iscsi_stats_custom {
+        char desc[ISCSI_STATS_CUSTOM_DESC_MAX];
+        uint64_t value;
+};
+
+/*
+ * struct iscsi_stats - iSCSI Statistics (iSCSI MIB)
+ *
+ * Note: this structure contains counters collected on per-connection basis.
+ */
+struct iscsi_stats {
+        /* octets */
+        uint64_t txdata_octets;
+        uint64_t rxdata_octets;
+
+        /* xmit pdus */
+        uint32_t noptx_pdus;
+        uint32_t scsicmd_pdus;
+        uint32_t tmfcmd_pdus;
+        uint32_t login_pdus;
+        uint32_t text_pdus;
+        uint32_t dataout_pdus;
+        uint32_t logout_pdus;
+        uint32_t snack_pdus;
+
+        /* recv pdus */
+        uint32_t noprx_pdus;
+        uint32_t scsirsp_pdus;
+        uint32_t tmfrsp_pdus;
+        uint32_t textrsp_pdus;
+        uint32_t datain_pdus;
+        uint32_t logoutrsp_pdus;
+        uint32_t r2t_pdus;
+        uint32_t async_pdus;
+        uint32_t rjt_pdus;
+
+        /* errors */
+        uint32_t digest_err;
+        uint32_t timeout_err;
+
+        /*
+         * iSCSI Custom Statistics support, i.e. Transport could
+         * extend existing MIB statistics with its own specific statistics
+         * up to ISCSI_STATS_CUSTOM_MAX
+         */
+        uint32_t custom_length;
+        struct iscsi_stats_custom custom[0]
+                __attribute__ ((aligned (sizeof(uint64_t))));
+};
+
+#endif
diff --git a/include/scsi/iscsi_proto.h b/include/scsi/iscsi_proto.h
new file mode 100644
index 000000000000..6c08551c79f5
--- /dev/null
+++ b/include/scsi/iscsi_proto.h
@@ -0,0 +1,566 @@
+/*
+ * RFC 3720 (iSCSI) protocol data types
+ *
+ * Copyright (C) 2005 Dmitry Yusupov
+ * Copyright (C) 2005 Alex Aizman
+ * maintained by open-iscsi@googlegroups.com
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * See the file COPYING included with this distribution for more details.
+ */
+
+#ifndef ISCSI_PROTO_H
+#define ISCSI_PROTO_H
+
+#define ISCSI_VERSION_STR       "0.3"
+#define ISCSI_DATE_STR          "22-Apr-2005"
+#define ISCSI_DRAFT20_VERSION   0x00
+
+/* default iSCSI listen port for incoming connections */
+#define ISCSI_LISTEN_PORT       3260
+
+/* Padding word length */
+#define PAD_WORD_LEN            4
+
+/*
+ * useful common(control and data pathes) macro
+ */
+#define ntoh24(p) (((p)[0] << 16) | ((p)[1] << 8) | ((p)[2]))
+#define hton24(p, v) { \
+        p[0] = (((v) >> 16) & 0xFF); \
+        p[1] = (((v) >> 8) & 0xFF); \
+        p[2] = ((v) & 0xFF); \
+}
+#define zero_data(p) {p[0]=0;p[1]=0;p[2]=0;}
+
+/*
+ * iSCSI Template Message Header
+ */
+struct iscsi_hdr {
+        uint8_t         opcode;
+        uint8_t         flags;          /* Final bit */
+        uint8_t         rsvd2[2];
+        uint8_t         hlength;        /* AHSs total length */
+        uint8_t         dlength[3];     /* Data length */
+        uint8_t         lun[8];
+        __be32          itt;            /* Initiator Task Tag */
+        __be32          ttt;            /* Target Task Tag */
+        __be32          statsn;
+        __be32          exp_statsn;
+        uint8_t         other[16];
+};
+
+/************************* RFC 3720 Begin *****************************/
+
+#define ISCSI_RESERVED_TAG              0xffffffff
+
+/* Opcode encoding bits */
+#define ISCSI_OP_RETRY                  0x80
+#define ISCSI_OP_IMMEDIATE              0x40
+#define ISCSI_OPCODE_MASK               0x3F
+
+/* Initiator Opcode values */
+#define ISCSI_OP_NOOP_OUT               0x00
+#define ISCSI_OP_SCSI_CMD               0x01
+#define ISCSI_OP_SCSI_TMFUNC            0x02
+#define ISCSI_OP_LOGIN                  0x03
+#define ISCSI_OP_TEXT                   0x04
+#define ISCSI_OP_SCSI_DATA_OUT          0x05
+#define ISCSI_OP_LOGOUT                 0x06
+#define ISCSI_OP_SNACK                  0x10
+
+/* Target Opcode values */
+#define ISCSI_OP_NOOP_IN                0x20
+#define ISCSI_OP_SCSI_CMD_RSP           0x21
+#define ISCSI_OP_SCSI_TMFUNC_RSP        0x22
+#define ISCSI_OP_LOGIN_RSP              0x23
+#define ISCSI_OP_TEXT_RSP               0x24
+#define ISCSI_OP_SCSI_DATA_IN           0x25
+#define ISCSI_OP_LOGOUT_RSP             0x26
+#define ISCSI_OP_R2T                    0x31
+#define ISCSI_OP_ASYNC_EVENT            0x32
+#define ISCSI_OP_REJECT                 0x3f
+
+/* iSCSI PDU Header */
+struct iscsi_cmd {
+        uint8_t opcode;
+        uint8_t flags;
+        uint8_t rsvd2;
+        uint8_t cmdrn;
+        uint8_t hlength;
+        uint8_t dlength[3];
+        uint8_t lun[8];
+        __be32 itt;     /* Initiator Task Tag */
+        __be32 data_length;
+        __be32 cmdsn;
+        __be32 exp_statsn;
+        uint8_t cdb[16];        /* SCSI Command Block */
+        /* Additional Data (Command Dependent) */
+};
+
+/* Command PDU flags */
+#define ISCSI_FLAG_CMD_FINAL            0x80
+#define ISCSI_FLAG_CMD_READ             0x40
+#define ISCSI_FLAG_CMD_WRITE            0x20
+#define ISCSI_FLAG_CMD_ATTR_MASK        0x07    /* 3 bits */
+
+/* SCSI Command Attribute values */
+#define ISCSI_ATTR_UNTAGGED             0
+#define ISCSI_ATTR_SIMPLE               1
+#define ISCSI_ATTR_ORDERED              2
+#define ISCSI_ATTR_HEAD_OF_QUEUE        3
+#define ISCSI_ATTR_ACA                  4
+
+/* SCSI Response Header */
+struct iscsi_cmd_rsp {
+        uint8_t opcode;
+        uint8_t flags;
+        uint8_t response;
+        uint8_t cmd_status;
+        uint8_t hlength;
+        uint8_t dlength[3];
+        uint8_t rsvd[8];
+        __be32  itt;    /* Initiator Task Tag */
+        __be32  rsvd1;
+        __be32  statsn;
+        __be32  exp_cmdsn;
+        __be32  max_cmdsn;
+        __be32  exp_datasn;
+        __be32  bi_residual_count;
+        __be32  residual_count;
+        /* Response or Sense Data (optional) */
+};
+
+/* Command Response PDU flags */
+#define ISCSI_FLAG_CMD_BIDI_OVERFLOW    0x10
+#define ISCSI_FLAG_CMD_BIDI_UNDERFLOW   0x08
+#define ISCSI_FLAG_CMD_OVERFLOW         0x04
+#define ISCSI_FLAG_CMD_UNDERFLOW        0x02
+
+/* iSCSI Status values. Valid if Rsp Selector bit is not set */
+#define ISCSI_STATUS_CMD_COMPLETED      0
+#define ISCSI_STATUS_TARGET_FAILURE     1
+#define ISCSI_STATUS_SUBSYS_FAILURE     2
+
+/* Asynchronous Event Header */
+struct iscsi_async {
+        uint8_t opcode;
+        uint8_t flags;
+        uint8_t rsvd2[2];
+        uint8_t rsvd3;
+        uint8_t dlength[3];
+        uint8_t lun[8];
+        uint8_t rsvd4[8];
+        __be32  statsn;
+        __be32  exp_cmdsn;
+        __be32  max_cmdsn;
+        uint8_t async_event;
+        uint8_t async_vcode;
+        __be16  param1;
+        __be16  param2;
+        __be16  param3;
+        uint8_t rsvd5[4];
+};
+
+/* iSCSI Event Codes */
+#define ISCSI_ASYNC_MSG_SCSI_EVENT                      0
+#define ISCSI_ASYNC_MSG_REQUEST_LOGOUT                  1
+#define ISCSI_ASYNC_MSG_DROPPING_CONNECTION             2
+#define ISCSI_ASYNC_MSG_DROPPING_ALL_CONNECTIONS        3
+#define ISCSI_ASYNC_MSG_PARAM_NEGOTIATION               4
+#define ISCSI_ASYNC_MSG_VENDOR_SPECIFIC                 255
+
+/* NOP-Out Message */
+struct iscsi_nopout {
+        uint8_t opcode;
+        uint8_t flags;
+        __be16  rsvd2;
+        uint8_t rsvd3;
+        uint8_t dlength[3];
+        uint8_t lun[8];
+        __be32  itt;    /* Initiator Task Tag */
+        __be32  ttt;    /* Target Transfer Tag */
+        __be32  cmdsn;
+        __be32  exp_statsn;
+        uint8_t rsvd4[16];
+};
+
+/* NOP-In Message */
+struct iscsi_nopin {
+        uint8_t opcode;
+        uint8_t flags;
+        __be16  rsvd2;
+        uint8_t rsvd3;
+        uint8_t dlength[3];
+        uint8_t lun[8];
+        __be32  itt;    /* Initiator Task Tag */
+        __be32  ttt;    /* Target Transfer Tag */
+        __be32  statsn;
+        __be32  exp_cmdsn;
+        __be32  max_cmdsn;
+        uint8_t rsvd4[12];
+};
+
+/* SCSI Task Management Message Header */
+struct iscsi_tm {
+        uint8_t opcode;
+        uint8_t flags;
+        uint8_t rsvd1[2];
+        uint8_t hlength;
+        uint8_t dlength[3];
+        uint8_t lun[8];
+        __be32  itt;    /* Initiator Task Tag */
+        __be32  rtt;    /* Reference Task Tag */
+        __be32  cmdsn;
+        __be32  exp_statsn;
+        __be32  refcmdsn;
+        __be32  exp_datasn;
+        uint8_t rsvd2[8];
+};
+
+#define ISCSI_FLAG_TASK_MGMT_FUNCTION_MASK      0x7F
+
+/* Function values */
+#define ISCSI_TM_FUNC_ABORT_TASK                1
+#define ISCSI_TM_FUNC_ABORT_TASK_SET            2
+#define ISCSI_TM_FUNC_CLEAR_ACA                 3
+#define ISCSI_TM_FUNC_CLEAR_TASK_SET            4
+#define ISCSI_TM_FUNC_LOGICAL_UNIT_RESET        5
+#define ISCSI_TM_FUNC_TARGET_WARM_RESET         6
+#define ISCSI_TM_FUNC_TARGET_COLD_RESET         7
+#define ISCSI_TM_FUNC_TASK_REASSIGN             8
+
+/* SCSI Task Management Response Header */
+struct iscsi_tm_rsp {
+        uint8_t opcode;
+        uint8_t flags;
+        uint8_t response;       /* see Response values below */
+        uint8_t qualifier;
+        uint8_t hlength;
+        uint8_t dlength[3];
+        uint8_t rsvd2[8];
+        __be32  itt;    /* Initiator Task Tag */
+        __be32  rtt;    /* Reference Task Tag */
+        __be32  statsn;
+        __be32  exp_cmdsn;
+        __be32  max_cmdsn;
+        uint8_t rsvd3[12];
+};
+
+/* Response values */
+#define SCSI_TCP_TM_RESP_COMPLETE       0x00
+#define SCSI_TCP_TM_RESP_NO_TASK        0x01
+#define SCSI_TCP_TM_RESP_NO_LUN         0x02
+#define SCSI_TCP_TM_RESP_TASK_ALLEGIANT 0x03
+#define SCSI_TCP_TM_RESP_NO_FAILOVER    0x04
+#define SCSI_TCP_TM_RESP_NOT_SUPPORTED  0x05
+#define SCSI_TCP_TM_RESP_AUTH_FAILED    0x06
+#define SCSI_TCP_TM_RESP_REJECTED       0xff
+
+/* Ready To Transfer Header */
+struct iscsi_r2t_rsp {
+        uint8_t opcode;
+        uint8_t flags;
+        uint8_t rsvd2[2];
+        uint8_t hlength;
+        uint8_t dlength[3];
+        uint8_t lun[8];
+        __be32  itt;    /* Initiator Task Tag */
+        __be32  ttt;    /* Target Transfer Tag */
+        __be32  statsn;
+        __be32  exp_cmdsn;
+        __be32  max_cmdsn;
+        __be32  r2tsn;
+        __be32  data_offset;
+        __be32  data_length;
+};
+
+/* SCSI Data Hdr */
+struct iscsi_data {
+        uint8_t opcode;
+        uint8_t flags;
+        uint8_t rsvd2[2];
+        uint8_t rsvd3;
+        uint8_t dlength[3];
+        uint8_t lun[8];
+        __be32  itt;
+        __be32  ttt;
+        __be32  rsvd4;
+        __be32  exp_statsn;
+        __be32  rsvd5;
+        __be32  datasn;
+        __be32  offset;
+        __be32  rsvd6;
+        /* Payload */
+};
+
+/* SCSI Data Response Hdr */
+struct iscsi_data_rsp {
+        uint8_t opcode;
+        uint8_t flags;
+        uint8_t rsvd2;
+        uint8_t cmd_status;
+        uint8_t hlength;
+        uint8_t dlength[3];
+        uint8_t lun[8];
+        __be32  itt;
+        __be32  ttt;
+        __be32  statsn;
+        __be32  exp_cmdsn;
+        __be32  max_cmdsn;
+        __be32  datasn;
+        __be32  offset;
+        __be32  residual_count;
+};
+
+/* Data Response PDU flags */
+#define ISCSI_FLAG_DATA_ACK             0x40
+#define ISCSI_FLAG_DATA_OVERFLOW        0x04
+#define ISCSI_FLAG_DATA_UNDERFLOW       0x02
+#define ISCSI_FLAG_DATA_STATUS          0x01
+
+/* Text Header */
+struct iscsi_text {
+        uint8_t opcode;
+        uint8_t flags;
+        uint8_t rsvd2[2];
+        uint8_t hlength;
+        uint8_t dlength[3];
+        uint8_t rsvd4[8];
+        __be32  itt;
+        __be32  ttt;
+        __be32  cmdsn;
+        __be32  exp_statsn;
+        uint8_t rsvd5[16];
+        /* Text - key=value pairs */
+};
+
+#define ISCSI_FLAG_TEXT_CONTINUE        0x40
+
+/* Text Response Header */
+struct iscsi_text_rsp {
+        uint8_t opcode;
+        uint8_t flags;
+        uint8_t rsvd2[2];
+        uint8_t hlength;
+        uint8_t dlength[3];
+        uint8_t rsvd4[8];
+        __be32  itt;
+        __be32  ttt;
+        __be32  statsn;
+        __be32  exp_cmdsn;
+        __be32  max_cmdsn;
+        uint8_t rsvd5[12];
+        /* Text Response - key:value pairs */
+};
+
+/* Login Header */
+struct iscsi_login {
+        uint8_t opcode;
+        uint8_t flags;
+        uint8_t max_version;    /* Max. version supported */
+        uint8_t min_version;    /* Min. version supported */
+        uint8_t hlength;
+        uint8_t dlength[3];
+        uint8_t isid[6];        /* Initiator Session ID */
+        __be16  tsih;   /* Target Session Handle */
+        __be32  itt;    /* Initiator Task Tag */
+        __be16  cid;
+        __be16  rsvd3;
+        __be32  cmdsn;
+        __be32  exp_statsn;
+        uint8_t rsvd5[16];
+};
+
+/* Login PDU flags */
+#define ISCSI_FLAG_LOGIN_TRANSIT                0x80
+#define ISCSI_FLAG_LOGIN_CONTINUE               0x40
+#define ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK     0x0C    /* 2 bits */
+#define ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK        0x03    /* 2 bits */
+
+#define ISCSI_LOGIN_CURRENT_STAGE(flags) \
+        ((flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) >> 2)
+#define ISCSI_LOGIN_NEXT_STAGE(flags) \
+        (flags & ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK)
+
+/* Login Response Header */
+struct iscsi_login_rsp {
+        uint8_t opcode;
+        uint8_t flags;
+        uint8_t max_version;    /* Max. version supported */
+        uint8_t active_version; /* Active version */
+        uint8_t hlength;
+        uint8_t dlength[3];
+        uint8_t isid[6];        /* Initiator Session ID */
+        __be16  tsih;   /* Target Session Handle */
+        __be32  itt;    /* Initiator Task Tag */
+        __be32  rsvd3;
+        __be32  statsn;
+        __be32  exp_cmdsn;
+        __be32  max_cmdsn;
+        uint8_t status_class;   /* see Login RSP ststus classes below */
+        uint8_t status_detail;  /* see Login RSP Status details below */
+        uint8_t rsvd4[10];
+};
+
+/* Login stage (phase) codes for CSG, NSG */
+#define ISCSI_INITIAL_LOGIN_STAGE               -1
+#define ISCSI_SECURITY_NEGOTIATION_STAGE        0
+#define ISCSI_OP_PARMS_NEGOTIATION_STAGE        1
+#define ISCSI_FULL_FEATURE_PHASE                3
+
+/* Login Status response classes */
+#define ISCSI_STATUS_CLS_SUCCESS                0x00
+#define ISCSI_STATUS_CLS_REDIRECT               0x01
+#define ISCSI_STATUS_CLS_INITIATOR_ERR          0x02
+#define ISCSI_STATUS_CLS_TARGET_ERR             0x03
+
+/* Login Status response detail codes */
+/* Class-0 (Success) */
+#define ISCSI_LOGIN_STATUS_ACCEPT               0x00
+
+/* Class-1 (Redirection) */
+#define ISCSI_LOGIN_STATUS_TGT_MOVED_TEMP       0x01
+#define ISCSI_LOGIN_STATUS_TGT_MOVED_PERM       0x02
+
+/* Class-2 (Initiator Error) */
+#define ISCSI_LOGIN_STATUS_INIT_ERR             0x00
+#define ISCSI_LOGIN_STATUS_AUTH_FAILED          0x01
+#define ISCSI_LOGIN_STATUS_TGT_FORBIDDEN        0x02
+#define ISCSI_LOGIN_STATUS_TGT_NOT_FOUND        0x03
+#define ISCSI_LOGIN_STATUS_TGT_REMOVED          0x04
+#define ISCSI_LOGIN_STATUS_NO_VERSION           0x05
+#define ISCSI_LOGIN_STATUS_ISID_ERROR           0x06
+#define ISCSI_LOGIN_STATUS_MISSING_FIELDS       0x07
+#define ISCSI_LOGIN_STATUS_CONN_ADD_FAILED      0x08
+#define ISCSI_LOGIN_STATUS_NO_SESSION_TYPE      0x09
+#define ISCSI_LOGIN_STATUS_NO_SESSION           0x0a
+#define ISCSI_LOGIN_STATUS_INVALID_REQUEST      0x0b
+
+/* Class-3 (Target Error) */
+#define ISCSI_LOGIN_STATUS_TARGET_ERROR         0x00
+#define ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE      0x01
+#define ISCSI_LOGIN_STATUS_NO_RESOURCES         0x02
+
+/* Logout Header */
+struct iscsi_logout {
+        uint8_t opcode;
+        uint8_t flags;
+        uint8_t rsvd1[2];
+        uint8_t hlength;
+        uint8_t dlength[3];
+        uint8_t rsvd2[8];
+        __be32  itt;    /* Initiator Task Tag */
+        __be16  cid;
+        uint8_t rsvd3[2];
+        __be32  cmdsn;
+        __be32  exp_statsn;
+        uint8_t rsvd4[16];
+};
+
+/* Logout PDU flags */
+#define ISCSI_FLAG_LOGOUT_REASON_MASK   0x7F
+
+/* logout reason_code values */
+
+#define ISCSI_LOGOUT_REASON_CLOSE_SESSION       0
+#define ISCSI_LOGOUT_REASON_CLOSE_CONNECTION    1
+#define ISCSI_LOGOUT_REASON_RECOVERY            2
+#define ISCSI_LOGOUT_REASON_AEN_REQUEST         3
+
+/* Logout Response Header */
+struct iscsi_logout_rsp {
+        uint8_t opcode;
+        uint8_t flags;
+        uint8_t response;       /* see Logout response values below */
+        uint8_t rsvd2;
+        uint8_t hlength;
+        uint8_t dlength[3];
+        uint8_t rsvd3[8];
+        __be32  itt;    /* Initiator Task Tag */
+        __be32  rsvd4;
+        __be32  statsn;
+        __be32  exp_cmdsn;
+        __be32  max_cmdsn;
+        __be32  rsvd5;
+        __be16  t2wait;
+        __be16  t2retain;
+        __be32  rsvd6;
+};
+
+/* logout response status values */
+
+#define ISCSI_LOGOUT_SUCCESS                    0
+#define ISCSI_LOGOUT_CID_NOT_FOUND              1
+#define ISCSI_LOGOUT_RECOVERY_UNSUPPORTED       2
+#define ISCSI_LOGOUT_CLEANUP_FAILED             3
+
+/* SNACK Header */
+struct iscsi_snack {
+        uint8_t opcode;
+        uint8_t flags;
+        uint8_t rsvd2[14];
+        __be32  itt;
+        __be32  begrun;
+        __be32  runlength;
+        __be32  exp_statsn;
+        __be32  rsvd3;
+        __be32  exp_datasn;
+        uint8_t rsvd6[8];
+};
+
+/* SNACK PDU flags */
+#define ISCSI_FLAG_SNACK_TYPE_MASK      0x0F    /* 4 bits */
+
+/* Reject Message Header */
+struct iscsi_reject {
+        uint8_t opcode;
+        uint8_t flags;
+        uint8_t reason;
+        uint8_t rsvd2;
+        uint8_t rsvd3;
+        uint8_t dlength[3];
+        uint8_t rsvd4[16];
+        __be32  statsn;
+        __be32  exp_cmdsn;
+        __be32  max_cmdsn;
+        __be32  datasn;
+        uint8_t rsvd5[8];
+        /* Text - Rejected hdr */
+};
+
+/* Reason for Reject */
+#define CMD_BEFORE_LOGIN        1
+#define DATA_DIGEST_ERROR       2
+#define DATA_SNACK_REJECT       3
+#define ISCSI_PROTOCOL_ERROR    4
+#define CMD_NOT_SUPPORTED       5
+#define IMM_CMD_REJECT          6
+#define TASK_IN_PROGRESS        7
+#define INVALID_SNACK           8
+#define BOOKMARK_REJECTED       9
+#define BOOKMARK_NO_RESOURCES   10
+#define NEGOTIATION_RESET       11
+
+/* Max. number of Key=Value pairs in a text message */
+#define MAX_KEY_VALUE_PAIRS     8192
+
+/* maximum length for text keys/values */
+#define KEY_MAXLEN              64
+#define VALUE_MAXLEN            255
+#define TARGET_NAME_MAXLEN      VALUE_MAXLEN
+
+#define DEFAULT_MAX_RECV_DATA_SEGMENT_LENGTH    8192
+
+/************************* RFC 3720 End *****************************/
+
+#endif /* ISCSI_PROTO_H */
diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h
index 1b26a6c0aa2a..f25041c386ec 100644
--- a/include/scsi/scsi_transport_iscsi.h
+++ b/include/scsi/scsi_transport_iscsi.h
@@ -1,8 +1,10 @@
-/* 
+/*
  * iSCSI transport class definitions
  *
  * Copyright (C) IBM Corporation, 2004
- * Copyright (C) Mike Christie, 2004
+ * Copyright (C) Mike Christie, 2004 - 2005
+ * Copyright (C) Dmitry Yusupov, 2004 - 2005
+ * Copyright (C) Alex Aizman, 2004 - 2005
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -21,158 +23,64 @@
 #ifndef SCSI_TRANSPORT_ISCSI_H
 #define SCSI_TRANSPORT_ISCSI_H
 
-#include <linux/config.h>
-#include <linux/in6.h>
-#include <linux/in.h>
-
-struct scsi_transport_template;
+#include <scsi/iscsi_if.h>
 
-struct iscsi_class_session {
-        uint8_t isid[6];
-        uint16_t tsih;
-        int header_digest;              /* 1 CRC32, 0 None */
-        int data_digest;                /* 1 CRC32, 0 None */
-        uint16_t tpgt;
-        union {
-                struct in6_addr sin6_addr;
-                struct in_addr sin_addr;
-        } u;
-        sa_family_t addr_type;          /* must be AF_INET or AF_INET6 */
-        uint16_t port;                  /* must be in network byte order */
-        int initial_r2t;                /* 1 Yes, 0 No */
-        int immediate_data;             /* 1 Yes, 0 No */
-        uint32_t max_recv_data_segment_len;
-        uint32_t max_burst_len;
-        uint32_t first_burst_len;
-        uint16_t def_time2wait;
-        uint16_t def_time2retain;
-        uint16_t max_outstanding_r2t;
-        int data_pdu_in_order;          /* 1 Yes, 0 No */
-        int data_sequence_in_order;     /* 1 Yes, 0 No */
-        int erl;
+/**
+ * struct iscsi_transport - iSCSI Transport template
+ *
+ * @name:               transport name
+ * @caps:               iSCSI Data-Path capabilities
+ * @create_session:     create new iSCSI session object
+ * @destroy_session:    destroy existing iSCSI session object
+ * @create_conn:        create new iSCSI connection
+ * @bind_conn:          associate this connection with existing iSCSI session
+ *                      and specified transport descriptor
+ * @destroy_conn:       destroy inactive iSCSI connection
+ * @set_param:          set iSCSI Data-Path operational parameter
+ * @start_conn:         set connection to be operational
+ * @stop_conn:          suspend/recover/terminate connection
+ * @send_pdu:           send iSCSI PDU, Login, Logout, NOP-Out, Reject, Text.
+ *
+ * Template API provided by iSCSI Transport
+ */
+struct iscsi_transport {
+        struct module *owner;
+        char *name;
+        unsigned int caps;
+        struct scsi_host_template *host_template;
+        int hostdata_size;
+        int max_lun;
+        unsigned int max_conn;
+        unsigned int max_cmd_len;
+        iscsi_sessionh_t (*create_session) (uint32_t initial_cmdsn,
+                                            struct Scsi_Host *shost);
+        void (*destroy_session) (iscsi_sessionh_t session);
+        iscsi_connh_t (*create_conn) (iscsi_sessionh_t session, uint32_t cid);
+        int (*bind_conn) (iscsi_sessionh_t session, iscsi_connh_t conn,
+                          uint32_t transport_fd, int is_leading);
+        int (*start_conn) (iscsi_connh_t conn);
+        void (*stop_conn) (iscsi_connh_t conn, int flag);
+        void (*destroy_conn) (iscsi_connh_t conn);
+        int (*set_param) (iscsi_connh_t conn, enum iscsi_param param,
+                          uint32_t value);
+        int (*get_param) (iscsi_connh_t conn, enum iscsi_param param,
+                          uint32_t *value);
+        int (*send_pdu) (iscsi_connh_t conn, struct iscsi_hdr *hdr,
+                         char *data, uint32_t data_size);
+        void (*get_stats) (iscsi_connh_t conn, struct iscsi_stats *stats);
 };
 
 /*
- * accessor macros
+ * transport registration upcalls
  */
-#define iscsi_isid(x) \
-        (((struct iscsi_class_session *)&(x)->starget_data)->isid)
-#define iscsi_tsih(x) \
-        (((struct iscsi_class_session *)&(x)->starget_data)->tsih)
-#define iscsi_header_digest(x) \
-        (((struct iscsi_class_session *)&(x)->starget_data)->header_digest)
-#define iscsi_data_digest(x) \
-        (((struct iscsi_class_session *)&(x)->starget_data)->data_digest)
-#define iscsi_port(x) \
-        (((struct iscsi_class_session *)&(x)->starget_data)->port)
-#define iscsi_addr_type(x) \
-        (((struct iscsi_class_session *)&(x)->starget_data)->addr_type)
-#define iscsi_sin_addr(x) \
-        (((struct iscsi_class_session *)&(x)->starget_data)->u.sin_addr)
-#define iscsi_sin6_addr(x) \
-        (((struct iscsi_class_session *)&(x)->starget_data)->u.sin6_addr)
-#define iscsi_tpgt(x) \
-        (((struct iscsi_class_session *)&(x)->starget_data)->tpgt)
-#define iscsi_initial_r2t(x) \
-        (((struct iscsi_class_session *)&(x)->starget_data)->initial_r2t)
-#define iscsi_immediate_data(x) \
-        (((struct iscsi_class_session *)&(x)->starget_data)->immediate_data)
-#define iscsi_max_recv_data_segment_len(x) \
-        (((struct iscsi_class_session *)&(x)->starget_data)->max_recv_data_segment_len)
-#define iscsi_max_burst_len(x) \
-        (((struct iscsi_class_session *)&(x)->starget_data)->max_burst_len)
-#define iscsi_first_burst_len(x) \
-        (((struct iscsi_class_session *)&(x)->starget_data)->first_burst_len)
-#define iscsi_def_time2wait(x) \
-        (((struct iscsi_class_session *)&(x)->starget_data)->def_time2wait)
-#define iscsi_def_time2retain(x) \
-        (((struct iscsi_class_session *)&(x)->starget_data)->def_time2retain)
-#define iscsi_max_outstanding_r2t(x) \
-        (((struct iscsi_class_session *)&(x)->starget_data)->max_outstanding_r2t)
-#define iscsi_data_pdu_in_order(x) \
-        (((struct iscsi_class_session *)&(x)->starget_data)->data_pdu_in_order)
-#define iscsi_data_sequence_in_order(x) \
-        (((struct iscsi_class_session *)&(x)->starget_data)->data_sequence_in_order)
-#define iscsi_erl(x) \
-        (((struct iscsi_class_session *)&(x)->starget_data)->erl)
+extern int iscsi_register_transport(struct iscsi_transport *tt);
+extern int iscsi_unregister_transport(struct iscsi_transport *tt);
 
 /*
- * The functions by which the transport class and the driver communicate
+ * control plane upcalls
  */
-struct iscsi_function_template {
-        /*
-         * target attrs
-         */
-        void (*get_isid)(struct scsi_target *);
-        void (*get_tsih)(struct scsi_target *);
-        void (*get_header_digest)(struct scsi_target *);
-        void (*get_data_digest)(struct scsi_target *);
-        void (*get_port)(struct scsi_target *);
-        void (*get_tpgt)(struct scsi_target *);
-        /*
-         * In get_ip_address the lld must set the address and
-         * the address type
-         */
-        void (*get_ip_address)(struct scsi_target *);
-        /*
-         * The lld should snprintf the name or alias to the buffer
-         */
-        ssize_t (*get_target_name)(struct scsi_target *, char *, ssize_t);
-        ssize_t (*get_target_alias)(struct scsi_target *, char *, ssize_t);
-        void (*get_initial_r2t)(struct scsi_target *);
-        void (*get_immediate_data)(struct scsi_target *);
-        void (*get_max_recv_data_segment_len)(struct scsi_target *);
-        void (*get_max_burst_len)(struct scsi_target *);
-        void (*get_first_burst_len)(struct scsi_target *);
-        void (*get_def_time2wait)(struct scsi_target *);
-        void (*get_def_time2retain)(struct scsi_target *);
-        void (*get_max_outstanding_r2t)(struct scsi_target *);
-        void (*get_data_pdu_in_order)(struct scsi_target *);
-        void (*get_data_sequence_in_order)(struct scsi_target *);
-        void (*get_erl)(struct scsi_target *);
-
-        /*
-         * host atts
-         */
-
-        /*
-         * The lld should snprintf the name or alias to the buffer
-         */
-        ssize_t (*get_initiator_alias)(struct Scsi_Host *, char *, ssize_t);
-        ssize_t (*get_initiator_name)(struct Scsi_Host *, char *, ssize_t);
-        /*
-         * The driver sets these to tell the transport class it
-         * wants the attributes displayed in sysfs.  If the show_ flag
-         * is not set, the attribute will be private to the transport
-         * class. We could probably just test if a get_ fn was set
-         * since we only use the values for sysfs but this is how
-         * fc does it too.
-         */
-        unsigned long show_isid:1;
-        unsigned long show_tsih:1;
-        unsigned long show_header_digest:1;
-        unsigned long show_data_digest:1;
-        unsigned long show_port:1;
-        unsigned long show_tpgt:1;
-        unsigned long show_ip_address:1;
-        unsigned long show_target_name:1;
-        unsigned long show_target_alias:1;
-        unsigned long show_initial_r2t:1;
-        unsigned long show_immediate_data:1;
-        unsigned long show_max_recv_data_segment_len:1;
-        unsigned long show_max_burst_len:1;
-        unsigned long show_first_burst_len:1;
-        unsigned long show_def_time2wait:1;
-        unsigned long show_def_time2retain:1;
-        unsigned long show_max_outstanding_r2t:1;
-        unsigned long show_data_pdu_in_order:1;
-        unsigned long show_data_sequence_in_order:1;
-        unsigned long show_erl:1;
-        unsigned long show_initiator_name:1;
-        unsigned long show_initiator_alias:1;
-};
-
-struct scsi_transport_template *iscsi_attach_transport(struct iscsi_function_template *);
-void iscsi_release_transport(struct scsi_transport_template *);
+extern void iscsi_conn_error(iscsi_connh_t conn, enum iscsi_err error);
+extern int iscsi_recv_pdu(iscsi_connh_t conn, struct iscsi_hdr *hdr,
+                          char *data, uint32_t data_size);
 
 #endif