/* $OpenBSD: iscsi.h,v 1.7 2010/07/10 22:24:14 jordan Exp $ */ /* * Copyright (c) 2008 David Gwynne * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #ifndef _SYS_SCSI_ISCSI_H #define _SYS_SCSI_ISCSI_H struct iscsi_pdu { u_int8_t opcode; u_int8_t flags; u_int8_t _reserved1[2]; u_int8_t ahslen; u_int8_t datalen[3]; u_int8_t lun[8]; u_int32_t itt; u_int8_t _reserved2[4]; u_int32_t cmdsn; u_int32_t expstatsn; u_int8_t _reserved3[16]; } __packed; /* * Initiator opcodes */ #define ISCSI_OP_I_NOP 0x00 #define ISCSI_OP_SCSI_REQUEST 0x01 #define ISCSI_OP_TASK_REQUEST 0x02 #define ISCSI_OP_LOGIN_REQUEST 0x03 #define ISCSI_OP_TEXT_REQUEST 0x04 #define ISCSI_OP_DATA_OUT 0x05 #define ISCSI_OP_LOGOUT_REQUEST 0x06 #define ISCSI_OP_SNACK_REQUEST 0x10 /* * Target opcodes */ #define ISCSI_OP_T_NOP 0x20 #define ISCSI_OP_SCSI_RESPONSE 0x21 #define ISCSI_OP_TASK_RESPONSE 0x22 #define ISCSI_OP_LOGIN_RESPONSE 0x23 #define ISCSI_OP_TEXT_RESPONSE 0x24 #define ISCSI_OP_DATA_IN 0x25 #define ISCSI_OP_LOGOUT_RESPONSE 0x26 #define ISCSI_OP_R2T 0x31 #define ISCSI_OP_ASYNC 0x32 #define ISCSI_OP_REJECT 0x3f #define ISCSI_PDU_OPCODE(_o) ((_o) & 0x3f) #define ISCSI_PDU_I(_h) ((_h)->opcode & 0x40) #define ISCSI_PDU_F(_h) ((_h)->flags & 0x80) #define ISCSI_OP_F_IMMEDIATE 0x40 /* * various other flags and values */ #define ISCSI_ISID_OUI 0x00000000 #define ISCSI_ISID_EN 0x40000000 #define ISCSI_ISID_RAND 0x80000000 struct iscsi_pdu_scsi_request { u_int8_t opcode; u_int8_t flags; u_int8_t _reserved[2]; u_int8_t ahslen; u_int8_t datalen[3]; u_int8_t lun[8]; u_int32_t itt; u_int32_t bytes; u_int32_t cmdsn; u_int32_t expstatsn; u_int8_t cdb[16]; } __packed; struct iscsi_pdu_scsi_response { u_int8_t opcode; u_int8_t flags; u_int8_t response; u_int8_t status; u_int8_t ahslen; u_int8_t datalen[3]; u_int8_t _reserved[8]; u_int32_t itt; u_int32_t snack; u_int32_t statsn; u_int32_t expcmdsn; u_int32_t maxcmdsn; u_int32_t expdatasn; u_int32_t birescount; u_int32_t rescount; } __packed; #define ISCSI_SCSI_F_F 0x80 #define ISCSI_SCSI_F_R 0x40 #define ISCSI_SCSI_F_W 0x20 #define ISCSI_SCSI_ATTR_UNTAGGED 0 #define ISCSI_SCSI_ATTR_SIMPLE 1 #define ISCSI_SCSI_ATTR_ORDERED 2 #define ISCSI_SCSI_ATTR_HEAD_OF_Q 3 #define ISCSI_SCSI_ATTR_ACA 4 #define ISCSI_SCSI_STAT_GOOD 0x00 #define ISCSI_SCSI_STAT_CHCK_COND 0x02 /* we don't care about the type of the other error conditions */ struct iscsi_pdu_task_request { u_int8_t opcode; u_int8_t flags; u_int8_t reserved[2]; u_int8_t ahslen; u_int8_t datalen[3]; u_int8_t lun[8]; u_int32_t itt; u_int32_t tag; u_int32_t cmdsn; u_int32_t expstatsn; u_int32_t refcmdsn; u_int32_t expdatasn; u_int8_t _reserved[8]; } __packed; struct iscsi_pdu_task_response { u_int8_t opcode; u_int8_t flags; u_int8_t response; u_int8_t _reserved1; u_int8_t ahslen; u_int8_t datalen[3]; u_int8_t _reserved[8]; u_int32_t itt; u_int8_t _reserved2[4]; u_int32_t statsn; u_int32_t expcmdsn; u_int32_t maxcmdsn; u_int8_t _reserved3[12]; } __packed; struct iscsi_pdu_data_out { u_int8_t opcode; u_int8_t flags; u_int8_t _reserved1[2]; u_int8_t ahslen; u_int8_t datalen[3]; u_int8_t lun[8]; u_int32_t itt; u_int32_t ttt; u_int8_t _reserved2[4]; u_int32_t expstatsn; u_int8_t _reserved3[4]; u_int32_t datasn; u_int32_t buffer_offs; u_int8_t _reserved4[4]; } __packed; struct iscsi_pdu_data_in { u_int8_t opcode; u_int8_t flags; u_int8_t _reserved; u_int8_t status; u_int8_t ahslen; u_int8_t datalen[3]; u_int8_t lun[8]; u_int32_t itt; u_int32_t ttt; u_int32_t statsn; u_int32_t expcmdsn; u_int32_t maxcmdsn; u_int32_t datasn; u_int32_t buffer_offs; u_int32_t residual; } __packed; struct iscsi_pdu_rt2 { u_int8_t opcode; u_int8_t flags; u_int8_t _reserved1[2]; u_int8_t ahslen; u_int8_t datalen[3]; u_int8_t lun[8]; u_int32_t itt; u_int32_t ttt; u_int32_t statsn; u_int32_t expcmdsn; u_int32_t maxcmdsn; u_int32_t r2tsn; u_int32_t buffer_offs; u_int32_t desired_datalen; } __packed; struct iscsi_pdu_async { u_int8_t opcode; u_int8_t flags; u_int8_t _reserved1[2]; u_int8_t ahslen; u_int8_t datalen[3]; u_int8_t lun[8]; u_int32_t ffffffff; u_int8_t _reserved2[4]; u_int32_t statsn; u_int32_t expcmdsn; u_int32_t maxcmdsn; u_int8_t event; u_int8_t vcode; u_int16_t param[3]; u_int8_t _reserved3[4]; } __packed; struct iscsi_pdu_text_request { u_int8_t opcode; u_int8_t flags; u_int8_t _reserved1[2]; u_int8_t ahslen; u_int8_t datalen[3]; u_int8_t lun[8]; u_int32_t itt; u_int32_t ttt; u_int32_t cmdsn; u_int32_t expstatsn; u_int8_t _reserved2[16]; } __packed; struct iscsi_pdu_text_response { u_int8_t opcode; u_int8_t flags; u_int8_t _reserved1[2]; u_int8_t ahslen; u_int8_t datalen[3]; u_int8_t lun[8]; u_int32_t itt; u_int32_t ttt; u_int32_t cmdsn; u_int32_t expcmdsn; u_int32_t maxcmdsn; u_int8_t _reserved2[12]; } __packed; #define ISCSI_TEXT_F_F 0x80 #define ISCSI_TEXT_F_C 0x40 struct iscsi_pdu_login_request { u_int8_t opcode; u_int8_t flags; u_int8_t version_max; u_int8_t version_min; u_int8_t ahslen; u_int8_t datalen[3]; u_int32_t isid_base; u_int16_t isid_qual; u_int16_t tsih; u_int32_t itt; u_int16_t cid; u_int8_t _reserved1[2]; u_int32_t cmdsn; u_int32_t expstatsn; u_int8_t _reserved2[16]; } __packed; #define ISCSI_LOGIN_F_T 0x80 #define ISCSI_LOGIN_F_C 0x40 #define ISCSI_LOGIN_F_CSG(x) (((x) & 0x3) << 2) #define ISCSI_LOGIN_F_NSG(x) ((x) & 0x3) #define ISCSI_LOGIN_STG_SECNEG 0 #define ISCSI_LOGIN_STG_OPNEG 1 #define ISCSI_LOGIN_STG_FULL 3 struct iscsi_pdu_login_response { u_int8_t opcode; u_int8_t flags; u_int8_t version_max; u_int8_t version_active; u_int8_t ahslen; u_int8_t datalen[3]; u_int32_t isid_base; u_int16_t isid_qual; u_int16_t tsih; u_int32_t itt; u_int8_t _reserved1[4]; u_int32_t statsn; u_int32_t expcmdsn; u_int32_t maxcmdsn; u_int8_t status_class; u_int8_t status_detail; u_int8_t _reserved2[10]; } __packed; struct iscsi_pdu_logout_request { u_int8_t opcode; u_int8_t flags; u_int8_t _reserved1[2]; u_int8_t ahslen; u_int8_t datalen[3]; u_int8_t _reserved2[8]; u_int32_t itt; u_int16_t cid; u_int8_t _reserved3[2]; u_int32_t cmdsn; u_int32_t expstatsn; u_int8_t _reserved4[16]; } __packed; struct iscsi_pdu_logout_response { u_int8_t opcode; u_int8_t flags; u_int8_t _reserved1[2]; u_int8_t ahslen; u_int8_t datalen[3]; u_int8_t _reserved2[8]; u_int32_t itt; u_int8_t _reserved3[4]; u_int32_t statsn; u_int32_t expcmdsn; u_int32_t maxcmdsn; u_int8_t _reserved4[4]; u_int16_t time2wait; u_int16_t time2retain; u_int8_t _reserved5[4]; } __packed; struct iscsi_pdu_snack_request { u_int8_t opcode; u_int8_t flags; u_int8_t _reserved1[2]; u_int8_t ahslen; u_int8_t datalen[3]; u_int8_t lun[8]; u_int32_t itt; u_int32_t ttt; u_int8_t _reserved2[4]; u_int32_t expstatsn; u_int8_t _reserved3[8]; u_int32_t begrun; u_int32_t runlength; } __packed; struct iscsi_pdu_reject { u_int8_t opcode; u_int8_t flags; u_int8_t reason; u_int8_t _reserved1; u_int8_t ahslen; u_int8_t datalen[3]; u_int8_t _reserved2[8]; u_int32_t ffffffff; u_int8_t _reserved3[4]; u_int32_t statsn; u_int32_t expcmdsn; u_int32_t maxcmdsn; u_int32_t datasn_r2tsn; u_int8_t _reserved4[8]; } __packed; struct iscsi_pdu_nop_out { u_int8_t opcode; u_int8_t flags; u_int8_t _reserved1[2]; u_int8_t ahslen; u_int8_t datalen[3]; u_int8_t lun[8]; u_int32_t itt; u_int32_t ttt; u_int32_t cmdsn; u_int32_t expstatsn; u_int8_t _reserved2[16]; } __packed; struct iscsi_pdu_nop_in { u_int8_t opcode; u_int8_t flags; u_int8_t _reserved1[2]; u_int8_t ahslen; u_int8_t datalen[3]; u_int8_t lun[8]; u_int32_t itt; u_int32_t ttt; u_int32_t statsn; u_int32_t expcmdsn; u_int32_t maxcmdsn; u_int8_t _reserved2[12]; } __packed; #endif /* _SYS_SCSI_ISCSI_H */