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numam-spdk/include/spdk/iscsi_spec.h
Daniel Verkamp 1e33a802b4 iscsi: fix layout of logout request reason field 
The Logout Request reason field is the low 7 bits of byte byte 1; the
last bit of byte 1 is specified to be always 1, and we shouldn't
consider it to be part of the reason field.

The existing debug print code was parsing the reason field correctly (by
masking it against 0x7f), but it's simpler to just make the reason field
into a bitfield of the proper size; this fixes the real bug in the
reqh->reason != 0 check, which did not use the 0x7f mask.

Fixes GitHub issue #198.

Change-Id: I4813da2236c70dc1761e303b34d321750ee36626
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
Reviewed-on: https://review.gerrithub.io/378658
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Ziye Yang <optimistyzy@gmail.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
2017-09-22 16:11:11 -04:00

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/*-
* BSD LICENSE
*
* Copyright (C) 2008-2012 Daisuke Aoyama <aoyama@peach.ne.jp>.
* Copyright (c) Intel Corporation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* \file
* iSCSI specification definitions
*/
#ifndef SPDK_ISCSI_SPEC_H
#define SPDK_ISCSI_SPEC_H
#include "spdk/stdinc.h"
#include "spdk/assert.h"
#define ISCSI_BHS_LEN 48
#define ISCSI_DIGEST_LEN 4
#define ISCSI_ALIGNMENT 4
/** support version - RFC3720(10.12.4) */
#define ISCSI_VERSION 0x00
#define ISCSI_ALIGN(SIZE) \
(((SIZE) + (ISCSI_ALIGNMENT - 1)) & ~(ISCSI_ALIGNMENT - 1))
/** for authentication key (non encoded 1024bytes) RFC3720(5.1/11.1.4) */
#define ISCSI_TEXT_MAX_VAL_LEN 8192
/**
* RFC 3720 5.1
* If not otherwise specified, the maximum length of a simple-value
* (not its encoded representation) is 255 bytes, not including the delimiter
* (comma or zero byte).
*/
#define ISCSI_TEXT_MAX_SIMPLE_VAL_LEN 255
#define ISCSI_TEXT_MAX_KEY_LEN 63
enum iscsi_op {
/* Initiator opcodes */
ISCSI_OP_NOPOUT = 0x00,
ISCSI_OP_SCSI = 0x01,
ISCSI_OP_TASK = 0x02,
ISCSI_OP_LOGIN = 0x03,
ISCSI_OP_TEXT = 0x04,
ISCSI_OP_SCSI_DATAOUT = 0x05,
ISCSI_OP_LOGOUT = 0x06,
ISCSI_OP_SNACK = 0x10,
ISCSI_OP_VENDOR_1C = 0x1c,
ISCSI_OP_VENDOR_1D = 0x1d,
ISCSI_OP_VENDOR_1E = 0x1e,
/* Target opcodes */
ISCSI_OP_NOPIN = 0x20,
ISCSI_OP_SCSI_RSP = 0x21,
ISCSI_OP_TASK_RSP = 0x22,
ISCSI_OP_LOGIN_RSP = 0x23,
ISCSI_OP_TEXT_RSP = 0x24,
ISCSI_OP_SCSI_DATAIN = 0x25,
ISCSI_OP_LOGOUT_RSP = 0x26,
ISCSI_OP_R2T = 0x31,
ISCSI_OP_ASYNC = 0x32,
ISCSI_OP_VENDOR_3C = 0x3c,
ISCSI_OP_VENDOR_3D = 0x3d,
ISCSI_OP_VENDOR_3E = 0x3e,
ISCSI_OP_REJECT = 0x3f,
};
enum iscsi_task_func {
ISCSI_TASK_FUNC_ABORT_TASK = 1,
ISCSI_TASK_FUNC_ABORT_TASK_SET = 2,
ISCSI_TASK_FUNC_CLEAR_ACA = 3,
ISCSI_TASK_FUNC_CLEAR_TASK_SET = 4,
ISCSI_TASK_FUNC_LOGICAL_UNIT_RESET = 5,
ISCSI_TASK_FUNC_TARGET_WARM_RESET = 6,
ISCSI_TASK_FUNC_TARGET_COLD_RESET = 7,
ISCSI_TASK_FUNC_TASK_REASSIGN = 8,
};
enum iscsi_task_func_resp {
ISCSI_TASK_FUNC_RESP_COMPLETE = 0,
ISCSI_TASK_FUNC_RESP_TASK_NOT_EXIST = 1,
ISCSI_TASK_FUNC_RESP_LUN_NOT_EXIST = 2,
ISCSI_TASK_FUNC_RESP_TASK_STILL_ALLEGIANT = 3,
ISCSI_TASK_FUNC_RESP_REASSIGNMENT_NOT_SUPPORTED = 4,
ISCSI_TASK_FUNC_RESP_FUNC_NOT_SUPPORTED = 5,
ISCSI_TASK_FUNC_RESP_AUTHORIZATION_FAILED = 6,
ISCSI_TASK_FUNC_REJECTED = 255
};
struct iscsi_bhs {
uint8_t opcode : 6;
uint8_t immediate : 1;
uint8_t reserved : 1;
uint8_t flags;
uint8_t rsv[2];
uint8_t total_ahs_len;
uint8_t data_segment_len[3];
uint64_t lun;
uint32_t itt;
uint32_t ttt;
uint32_t stat_sn;
uint32_t exp_stat_sn;
uint32_t max_stat_sn;
uint8_t res3[12];
};
SPDK_STATIC_ASSERT(sizeof(struct iscsi_bhs) == ISCSI_BHS_LEN, "ISCSI_BHS_LEN mismatch");
struct iscsi_bhs_async {
uint8_t opcode : 6; /* opcode = 0x32 */
uint8_t reserved : 2;
uint8_t flags;
uint8_t res[2];
uint8_t total_ahs_len;
uint8_t data_segment_len[3];
uint64_t lun;
uint32_t ffffffff;
uint32_t res3;
uint32_t stat_sn;
uint32_t exp_cmd_sn;
uint32_t max_cmd_sn;
uint8_t async_event;
uint8_t async_vcode;
uint16_t param1;
uint16_t param2;
uint16_t param3;
uint8_t res4[4];
};
struct iscsi_bhs_login_req {
uint8_t opcode : 6; /* opcode = 0x03 */
uint8_t immediate : 1;
uint8_t reserved : 1;
uint8_t flags;
uint8_t version_max;
uint8_t version_min;
uint8_t total_ahs_len;
uint8_t data_segment_len[3];
uint8_t isid[6];
uint16_t tsih;
uint32_t itt;
uint16_t cid;
uint16_t res2;
uint32_t cmd_sn;
uint32_t exp_stat_sn;
uint8_t res3[16];
};
struct iscsi_bhs_login_rsp {
uint8_t opcode : 6; /* opcode = 0x23 */
uint8_t reserved : 2;
uint8_t flags;
uint8_t version_max;
uint8_t version_act;
uint8_t total_ahs_len;
uint8_t data_segment_len[3];
uint8_t isid[6];
uint16_t tsih;
uint32_t itt;
uint32_t res2;
uint32_t stat_sn;
uint32_t exp_cmd_sn;
uint32_t max_cmd_sn;
uint8_t status_class;
uint8_t status_detail;
uint8_t res3[10];
};
struct iscsi_bhs_logout_req {
uint8_t opcode : 6; /* opcode = 0x06 */
uint8_t immediate : 1;
uint8_t reserved : 1;
uint8_t reason : 7;
uint8_t reason_1 : 1;
uint8_t res[2];
uint8_t total_ahs_len;
uint8_t data_segment_len[3];
uint8_t res2[8];
uint32_t itt;
uint16_t cid;
uint16_t res3;
uint32_t cmd_sn;
uint32_t exp_stat_sn;
uint8_t res4[16];
};
struct iscsi_bhs_logout_resp {
uint8_t opcode : 6; /* opcode = 0x26 */
uint8_t reserved : 2;
uint8_t flags;
uint8_t response;
uint8_t res;
uint8_t total_ahs_len;
uint8_t data_segment_len[3];
uint8_t res2[8];
uint32_t itt;
uint32_t res3;
uint32_t stat_sn;
uint32_t exp_cmd_sn;
uint32_t max_cmd_sn;
uint32_t res4;
uint16_t time_2_wait;
uint16_t time_2_retain;
uint32_t res5;
};
struct iscsi_bhs_nop_in {
uint8_t opcode : 6; /* opcode = 0x20 */
uint8_t reserved : 2;
uint8_t flags;
uint8_t res[2];
uint8_t total_ahs_len;
uint8_t data_segment_len[3];
uint64_t lun;
uint32_t itt;
uint32_t ttt;
uint32_t stat_sn;
uint32_t exp_cmd_sn;
uint32_t max_cmd_sn;
uint8_t res3[12];
};
struct iscsi_bhs_nop_out {
uint8_t opcode : 6; /* opcode = 0x00 */
uint8_t immediate : 1;
uint8_t reserved : 1;
uint8_t flags;
uint8_t res[2];
uint8_t total_ahs_len;
uint8_t data_segment_len[3];
uint64_t lun;
uint32_t itt;
uint32_t ttt;
uint32_t cmd_sn;
uint32_t exp_stat_sn;
uint8_t res4[16];
};
struct iscsi_bhs_r2t {
uint8_t opcode : 6; /* opcode = 0x31 */
uint8_t reserved : 2;
uint8_t flags;
uint8_t rsv[2];
uint8_t total_ahs_len;
uint8_t data_segment_len[3];
uint64_t lun;
uint32_t itt;
uint32_t ttt;
uint32_t stat_sn;
uint32_t exp_cmd_sn;
uint32_t max_cmd_sn;
uint32_t r2t_sn;
uint32_t buffer_offset;
uint32_t desired_xfer_len;
};
struct iscsi_bhs_reject {
uint8_t opcode : 6; /* opcode = 0x3f */
uint8_t reserved : 2;
uint8_t flags;
uint8_t reason;
uint8_t res;
uint8_t total_ahs_len;
uint8_t data_segment_len[3];
uint8_t res2[8];
uint32_t ffffffff;
uint32_t res3;
uint32_t stat_sn;
uint32_t exp_cmd_sn;
uint32_t max_cmd_sn;
uint32_t data_sn;
uint8_t res4[8];
};
struct iscsi_bhs_scsi_req {
uint8_t opcode : 6; /* opcode = 0x01 */
uint8_t immediate : 1;
uint8_t reserved : 1;
uint8_t attribute : 3;
uint8_t reserved2 : 2;
uint8_t write_bit : 1;
uint8_t read_bit : 1;
uint8_t final_bit : 1;
uint8_t res[2];
uint8_t total_ahs_len;
uint8_t data_segment_len[3];
uint64_t lun;
uint32_t itt;
uint32_t expected_data_xfer_len;
uint32_t cmd_sn;
uint32_t exp_stat_sn;
uint8_t cdb[16];
};
struct iscsi_bhs_scsi_resp {
uint8_t opcode : 6; /* opcode = 0x21 */
uint8_t reserved : 2;
uint8_t flags;
uint8_t response;
uint8_t status;
uint8_t total_ahs_len;
uint8_t data_segment_len[3];
uint8_t res4[8];
uint32_t itt;
uint32_t snacktag;
uint32_t stat_sn;
uint32_t exp_cmd_sn;
uint32_t max_cmd_sn;
uint32_t exp_data_sn;
uint32_t bi_read_res_cnt;
uint32_t res_cnt;
};
struct iscsi_bhs_data_in {
uint8_t opcode : 6; /* opcode = 0x05 */
uint8_t reserved : 2;
uint8_t flags;
uint8_t res;
uint8_t status;
uint8_t total_ahs_len;
uint8_t data_segment_len[3];
uint64_t lun;
uint32_t itt;
uint32_t ttt;
uint32_t stat_sn;
uint32_t exp_cmd_sn;
uint32_t max_cmd_sn;
uint32_t data_sn;
uint32_t buffer_offset;
uint32_t res_cnt;
};
struct iscsi_bhs_data_out {
uint8_t opcode : 6; /* opcode = 0x25 */
uint8_t reserved : 2;
uint8_t flags;
uint8_t res[2];
uint8_t total_ahs_len;
uint8_t data_segment_len[3];
uint64_t lun;
uint32_t itt;
uint32_t ttt;
uint32_t res3;
uint32_t exp_stat_sn;
uint32_t res4;
uint32_t data_sn;
uint32_t buffer_offset;
uint32_t res5;
};
struct iscsi_bhs_snack_req {
uint8_t opcode : 6; /* opcode = 0x10 */
uint8_t reserved : 2;
uint8_t flags;
uint8_t res[2];
uint8_t total_ahs_len;
uint8_t data_segment_len[3];
uint64_t lun;
uint32_t itt;
uint32_t ttt;
uint32_t res5;
uint32_t exp_stat_sn;
uint8_t res6[8];
uint32_t beg_run;
uint32_t run_len;
};
struct iscsi_bhs_task_req {
uint8_t opcode : 6; /* opcode = 0x02 */
uint8_t immediate : 1;
uint8_t reserved : 1;
uint8_t flags;
uint8_t res[2];
uint8_t total_ahs_len;
uint8_t data_segment_len[3];
uint64_t lun;
uint32_t itt;
uint32_t ref_task_tag;
uint32_t cmd_sn;
uint32_t exp_stat_sn;
uint32_t ref_cmd_sn;
uint32_t exp_data_sn;
uint8_t res5[8];
};
struct iscsi_bhs_task_resp {
uint8_t opcode : 6; /* opcode = 0x22 */
uint8_t reserved : 2;
uint8_t flags;
uint8_t response;
uint8_t res;
uint8_t total_ahs_len;
uint8_t data_segment_len[3];
uint8_t res2[8];
uint32_t itt;
uint32_t res3;
uint32_t stat_sn;
uint32_t exp_cmd_sn;
uint32_t max_cmd_sn;
uint8_t res4[12];
};
struct iscsi_bhs_text_req {
uint8_t opcode : 6; /* opcode = 0x04 */
uint8_t immediate : 1;
uint8_t reserved : 1;
uint8_t flags;
uint8_t res[2];
uint8_t total_ahs_len;
uint8_t data_segment_len[3];
uint64_t lun;
uint32_t itt;
uint32_t ttt;
uint32_t cmd_sn;
uint32_t exp_stat_sn;
uint8_t res3[16];
};
struct iscsi_bhs_text_resp {
uint8_t opcode : 6; /* opcode = 0x24 */
uint8_t reserved : 2;
uint8_t flags;
uint8_t res[2];
uint8_t total_ahs_len;
uint8_t data_segment_len[3];
uint64_t lun;
uint32_t itt;
uint32_t ttt;
uint32_t stat_sn;
uint32_t exp_cmd_sn;
uint32_t max_cmd_sn;
uint8_t res4[12];
};
/* generic flags */
#define ISCSI_FLAG_FINAL 0x80
/* login flags */
#define ISCSI_LOGIN_TRANSIT 0x80
#define ISCSI_LOGIN_CONTINUE 0x40
#define ISCSI_LOGIN_CURRENT_STAGE_MASK 0x0c
#define ISCSI_LOGIN_CURRENT_STAGE_0 0x04
#define ISCSI_LOGIN_CURRENT_STAGE_1 0x08
#define ISCSI_LOGIN_CURRENT_STAGE_3 0x0c
#define ISCSI_LOGIN_NEXT_STAGE_MASK 0x03
#define ISCSI_LOGIN_NEXT_STAGE_0 0x01
#define ISCSI_LOGIN_NEXT_STAGE_1 0x02
#define ISCSI_LOGIN_NEXT_STAGE_3 0x03
/* text flags */
#define ISCSI_TEXT_CONTINUE 0x40
/* datain flags */
#define ISCSI_DATAIN_ACKNOLWEDGE 0x40
#define ISCSI_DATAIN_OVERFLOW 0x04
#define ISCSI_DATAIN_UNDERFLOW 0x02
#define ISCSI_DATAIN_STATUS 0x01
/* SCSI resp flags */
#define ISCSI_SCSI_BIDI_OVERFLOW 0x10
#define ISCSI_SCSI_BIDI_UNDERFLOW 0x08
#define ISCSI_SCSI_OVERFLOW 0x04
#define ISCSI_SCSI_UNDERFLOW 0x02
/* SCSI task flags */
#define ISCSI_TASK_FUNCTION_MASK 0x7f
/* Reason for Reject */
#define ISCSI_REASON_RESERVED 0x1
#define ISCSI_REASON_DATA_DIGEST_ERROR 0x2
#define ISCSI_REASON_DATA_SNACK_REJECT 0x3
#define ISCSI_REASON_PROTOCOL_ERROR 0x4
#define ISCSI_REASON_CMD_NOT_SUPPORTED 0x5
#define ISCSI_REASON_IMM_CMD_REJECT 0x6
#define ISCSI_REASON_TASK_IN_PROGRESS 0x7
#define ISCSI_REASON_INVALID_SNACK 0x8
#define ISCSI_REASON_INVALID_PDU_FIELD 0x9
#define ISCSI_REASON_LONG_OPERATION_REJECT 0xa
#define ISCSI_REASON_NEGOTIATION_RESET 0xb
#define ISCSI_REASON_WAIT_FOR_RESET 0xc
#define ISCSI_FLAG_SNACK_TYPE_DATA 0
#define ISCSI_FLAG_SNACK_TYPE_R2T 0
#define ISCSI_FLAG_SNACK_TYPE_STATUS 1
#define ISCSI_FLAG_SNACK_TYPE_DATA_ACK 2
#define ISCSI_FLAG_SNACK_TYPE_RDATA 3
#define ISCSI_FLAG_SNACK_TYPE_MASK 0x0F /* 4 bits */
struct iscsi_ahs {
/* 0-3 */
uint8_t ahs_len[2];
uint8_t ahs_type;
uint8_t ahs_specific1;
/* 4-x */
uint8_t ahs_specific2[];
};
#define ISCSI_BHS_LOGIN_GET_TBIT(X) (!!(X & ISCSI_LOGIN_TRANSIT))
#define ISCSI_BHS_LOGIN_GET_CBIT(X) (!!(X & ISCSI_LOGIN_CONTINUE))
#define ISCSI_BHS_LOGIN_GET_CSG(X) ((X & ISCSI_LOGIN_CURRENT_STAGE_MASK) >> 2)
#define ISCSI_BHS_LOGIN_GET_NSG(X) (X & ISCSI_LOGIN_NEXT_STAGE_MASK)
#define ISCSI_CLASS_SUCCESS 0x00
#define ISCSI_CLASS_REDIRECT 0x01
#define ISCSI_CLASS_INITIATOR_ERROR 0x02
#define ISCSI_CLASS_TARGET_ERROR 0x03
/* Class (Success) detailed info: 0 */
#define ISCSI_LOGIN_ACCEPT 0x00
/* Class (Redirection) detailed info: 1 */
#define ISCSI_LOGIN_TARGET_TEMPORARILY_MOVED 0x01
#define ISCSI_LOGIN_TARGET_PERMANENTLY_MOVED 0x02
/* Class (Initiator Error) detailed info: 2 */
#define ISCSI_LOGIN_INITIATOR_ERROR 0x00
#define ISCSI_LOGIN_AUTHENT_FAIL 0x01
#define ISCSI_LOGIN_AUTHORIZATION_FAIL 0x02
#define ISCSI_LOGIN_TARGET_NOT_FOUND 0x03
#define ISCSI_LOGIN_TARGET_REMOVED 0x04
#define ISCSI_LOGIN_UNSUPPORTED_VERSION 0x05
#define ISCSI_LOGIN_TOO_MANY_CONNECTIONS 0x06
#define ISCSI_LOGIN_MISSING_PARMS 0x07
#define ISCSI_LOGIN_CONN_ADD_FAIL 0x08
#define ISCSI_LOGIN_NOT_SUPPORTED_SESSION_TYPE 0x09
#define ISCSI_LOGIN_NO_SESSION 0x0a
#define ISCSI_LOGIN_INVALID_LOGIN_REQUEST 0x0b
/* Class (Target Error) detailed info: 3 */
#define ISCSI_LOGIN_STATUS_TARGET_ERROR 0x00
#define ISCSI_LOGIN_STATUS_SERVICE_UNAVAILABLE 0x01
#define ISCSI_LOGIN_STATUS_NO_RESOURCES 0x02
#endif /* SPDK_ISCSI_SPEC_H */
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