[haiku-commits] r38528 - haiku/trunk/headers/private/drivers
- From: andreas.faerber@xxxxxx
- To: haiku-commits@xxxxxxxxxxxxx
- Date: Sat, 4 Sep 2010 23:09:14 +0200 (CEST)
Author: andreasf
Date: 2010-09-04 23:09:13 +0200 (Sat, 04 Sep 2010)
New Revision: 38528
Changeset: http://dev.haiku-os.org/changeset/38528
Added:
haiku/trunk/headers/private/drivers/iscsi_cmds.h
Log:
iSCSI: Add header for protocol
Define structs for iSCSI messages, to be used by boot loader and kernel add-on.
For now it will refuse to compile for Little Endian systems (e.g., x86).
Added: haiku/trunk/headers/private/drivers/iscsi_cmds.h
===================================================================
--- haiku/trunk/headers/private/drivers/iscsi_cmds.h
(rev 0)
+++ haiku/trunk/headers/private/drivers/iscsi_cmds.h 2010-09-04 21:09:13 UTC
(rev 38528)
@@ -0,0 +1,336 @@
+/*
+ * Copyright 2010, Andreas Färber <andreas.faerber@xxxxxx>
+ * All rights reserved. Distributed under the terms of the MIT License.
+ */
+#ifndef ISCSI_CMDS_H
+#define ISCSI_CMDS_H
+
+
+#include <ByteOrder.h>
+
+
+// TODO Add Little Endian support by introducing more macros
+#if __BYTE_ORDER != __BIG_ENDIAN
+#error Only Big Endian systems supported yet.
+#endif
+
+
+// iSCSI Basic Header Segment (BHS) (RFC 3720 10.2.1)
+
+#define ISCSI_BHS_BYTE0 \
+ bool reserved : 1; \
+ bool immediateDelivery : 1; \
+ uint8 opcode : 6;
+
+// TODO This macro is LE-incompatible
+#define ISCSI_BHS_START \
+ ISCSI_BHS_BYTE0 \
+ bool final : 1;
+
+#define ISCSI_BHS_LENGTHS \
+ uint8 totalAHSLength; \
+ uint32 dataSegmentLength : 24;
+
+#define ISCSI_BHS_TASK_TAG \
+ uint32 initiatorTaskTag;
+
+#define ISCSI_BHS_TAGS \
+ ISCSI_BHS_TASK_TAG \
+ uint32 targetTransferTag;
+
+struct iscsi_basic_header_segment {
+ ISCSI_BHS_START
+ uint32 opcodeSpecific : 23;
+ ISCSI_BHS_LENGTHS
+ uint64 lun;
+ ISCSI_BHS_TASK_TAG
+ uint8 opcodeSpecific2[28];
+} _PACKED;
+
+// initiator opcodes
+#define ISCSI_OPCODE_NOP_OUT 0x00
+#define ISCSI_OPCODE_SCSI_COMMAND 0x01
+#define ISCSI_OPCODE_LOGIN_REQUEST 0x03
+#define ISCSI_OPCODE_TEXT_REQUEST 0x04
+#define ISCSI_OPCODE_LOGOUT_REQUEST 0x06
+// target opcodes
+#define ISCSI_OPCODE_NOP_IN 0x20
+#define ISCSI_OPCODE_SCSI_RESPONSE 0x21
+#define ISCSI_OPCODE_LOGIN_RESPONSE 0x23
+#define ISCSI_OPCODE_TEXT_RESPONSE 0x24
+#define ISCSI_OPCODE_SCSI_DATA_IN 0x25
+#define ISCSI_OPCODE_LOGOUT_RESPONSE 0x26
+
+// SCSI Command (RFC 3720 10.3)
+struct iscsi_scsi_command {
+ iscsi_scsi_command()
+ :
+ reserved(0),
+ opcode(ISCSI_OPCODE_SCSI_COMMAND),
+ reserved2(0),
+ reserved3(0)
+ {
+ }
+ ISCSI_BHS_START
+ bool r : 1;
+ bool w : 1;
+ uint8 reserved2 : 2;
+ uint8 attr : 3;
+ uint16 reserved3;
+ ISCSI_BHS_LENGTHS
+ uint64 lun;
+ ISCSI_BHS_TASK_TAG
+ uint32 expectedDataTransferLength;
+ uint32 cmdSN;
+ uint32 expStatSN;
+ uint8 cdb[16];
+} _PACKED;
+
+// SCSI Response (RFC 3720 10.4)
+struct iscsi_scsi_response {
+ ISCSI_BHS_START
+ uint8 reserved2 : 2;
+ bool o : 1;
+ bool u : 1;
+ bool O : 1;
+ bool U : 1;
+ bool reserved3 : 1;
+ uint8 response;
+ uint8 status;
+ ISCSI_BHS_LENGTHS
+ uint32 reserved4[2];
+ ISCSI_BHS_TASK_TAG
+ uint32 snackTag;
+ uint32 statSN;
+ uint32 expCmdSN;
+ uint32 maxCmdSN;
+ uint32 expDataSN;
+ uint32 bidirectionalReadResidualCount;
+ uint32 residualCount;
+} _PACKED;
+
+// SCSI Data-In (RFC 3270 10.7)
+struct iscsi_scsi_data_in {
+ ISCSI_BHS_START
+ bool acknowledge : 1;
+ uint8 reserved2 : 3;
+ bool O : 1;
+ bool U : 1;
+ bool S : 1;
+ uint8 reserved3;
+ uint8 status;
+ ISCSI_BHS_LENGTHS
+ uint64 lun;
+ ISCSI_BHS_TAGS
+ uint32 statSN;
+ uint32 expCmdSN;
+ uint32 maxCmdSN;
+ uint32 dataSN;
+ uint32 bufferOffset;
+ uint32 residualCount;
+} _PACKED;
+
+// Text Request (RFC 3720 10.10)
+struct iscsi_text_request {
+ iscsi_text_request()
+ :
+ reserved(0),
+ opcode(ISCSI_OPCODE_TEXT_REQUEST),
+ reserved2(2)
+ {
+ reserved3[0] = 0;
+ reserved3[1] = 0;
+ reserved3[2] = 0;
+ reserved3[3] = 0;
+ }
+ ISCSI_BHS_START
+ bool c : 1; // continue
+ uint32 reserved2 : 22;
+ ISCSI_BHS_LENGTHS
+ uint64 lun;
+ ISCSI_BHS_TAGS
+ uint32 cmdSN;
+ uint32 expStatSN;
+ uint32 reserved3[4];
+} _PACKED;
+
+// Text Response (RFC 3720 10.11)
+struct iscsi_text_response {
+ ISCSI_BHS_START
+ bool c : 1; // continue
+ uint32 reserved2 : 22;
+ ISCSI_BHS_LENGTHS
+ uint64 lun;
+ ISCSI_BHS_TAGS
+ uint32 statSN;
+ uint32 expCmdSN;
+ uint32 maxCmdSN;
+ uint32 reserved3[3];
+} _PACKED;
+
+struct iscsi_isid {
+ uint8 t : 2;
+ uint8 a : 6;
+ uint16 b;
+ uint8 c;
+ uint16 d;
+} _PACKED;
+
+// Login Request (RFC 3720 10.12)
+struct iscsi_login_request {
+ iscsi_login_request()
+ :
+ reserved(false),
+ immediateDelivery(1),
+ opcode(ISCSI_OPCODE_LOGIN_REQUEST),
+ reserved2(0),
+ reserved3(0)
+ {
+ memset(reserved4, 0, sizeof(reserved4));
+ }
+
+ ISCSI_BHS_BYTE0
+ bool transit : 1;
+ bool c : 1; // continue
+ uint8 reserved2 : 2;
+ uint8 currentStage : 2;
+ uint8 nextStage : 2;
+ uint8 versionMax;
+ uint8 versionMin;
+ ISCSI_BHS_LENGTHS
+ iscsi_isid isid;
+ uint16 tsih;
+ ISCSI_BHS_TASK_TAG
+ uint16 cid;
+ uint16 reserved3;
+ uint32 cmdSN;
+ uint32 expStatSN;
+ uint32 reserved4[4];
+} _PACKED;
+
+#define ISCSI_SESSION_STAGE_SECURITY_NEGOTIATION 0
+#define ISCSI_SESSION_STAGE_LOGIN_OPERATIONAL_NEGOTIATION 1
+#define ISCSI_SESSION_STAGE_FULL_FEATURE_PHASE 3
+
+#define ISCSI_VERSION 0x00
+
+#define ISCSI_ISID_OUI 0
+#define ISCSI_ISID_EN 1
+#define ISCSI_ISID_RANDOM 2
+
+// Login Response (RFC 3720 10.13)
+struct iscsi_login_response {
+ ISCSI_BHS_BYTE0
+ bool transit : 1;
+ bool c : 1; // continue
+ uint8 reserved2 : 2;
+ uint8 currentStage : 2;
+ uint8 nextStage : 2;
+ uint8 versionMax;
+ uint8 versionActive;
+ ISCSI_BHS_LENGTHS
+ iscsi_isid isid;
+ uint16 tsih;
+ ISCSI_BHS_TASK_TAG
+ uint32 reserved3;
+ uint32 statSN;
+ uint32 expCmdSN;
+ uint32 maxCmdSN;
+ uint8 statusClass;
+ uint8 statusDetail;
+ uint16 reserved4;
+ uint32 reserved5[2];
+} _PACKED;
+
+// Logout Request (RFC 3720 10.14)
+struct iscsi_logout_request {
+ iscsi_logout_request()
+ :
+ reserved(0),
+ opcode(ISCSI_OPCODE_LOGOUT_REQUEST),
+ final(true),
+ reserved2(0),
+ reserved4(0)
+ {
+ reserved3[0] = 0;
+ reserved3[1] = 0;
+ reserved5[0] = 0;
+ reserved5[1] = 0;
+ reserved5[2] = 0;
+ reserved5[3] = 0;
+ }
+ ISCSI_BHS_START
+ uint8 reasonCode : 7;
+ uint16 reserved2;
+ ISCSI_BHS_LENGTHS
+ uint32 reserved3[2];
+ ISCSI_BHS_TASK_TAG
+ uint16 cid;
+ uint16 reserved4;
+ uint32 cmdSN;
+ uint32 expStatSN;
+ uint32 reserved5[4];
+} _PACKED;
+
+#define ISCSI_LOGOUT_REASON_CLOSE_SESSION 0
+#define ISCSI_LOGOUT_REASON_CLOSE_CONNECTION 1
+#define ISCSI_LOGOUT_REASON_REMOVE_CONNECTION 2
+
+// Logout Response (RFC 3720 10.15)
+struct iscsi_logout_response {
+ ISCSI_BHS_START
+ uint8 reserved2 : 7;
+ uint8 response;
+ uint8 reserved3;
+ ISCSI_BHS_LENGTHS
+ uint32 reserved4[2];
+ ISCSI_BHS_TASK_TAG
+ uint32 reserved5;
+ uint32 statSN;
+ uint32 expCmdSN;
+ uint32 maxCmdSN;
+ uint32 reserved6;
+ uint16 time2Wait;
+ uint16 time2Remain;
+ uint32 reserved7;
+} _PACKED;
+
+// NOP-Out (RFC 3270, 10.18)
+struct iscsi_nop_out {
+ iscsi_nop_out()
+ :
+ reserved(0),
+ opcode(ISCSI_OPCODE_NOP_OUT),
+ final(true),
+ reserved2(0)
+ {
+ reserved3[0] = 0;
+ reserved3[1] = 0;
+ reserved3[2] = 0;
+ reserved3[3] = 0;
+ }
+ ISCSI_BHS_START
+ uint32 reserved2 : 23;
+ ISCSI_BHS_LENGTHS
+ uint64 lun;
+ ISCSI_BHS_TAGS
+ uint32 cmdSN;
+ uint32 expStatSN;
+ uint32 reserved3[4];
+} _PACKED;
+
+// NOP-In (RFC 3270, 10.19)
+struct iscsi_nop_in {
+ ISCSI_BHS_START
+ uint32 reserved2 : 23;
+ ISCSI_BHS_LENGTHS
+ uint64 lun;
+ ISCSI_BHS_TAGS
+ uint32 statSN;
+ uint32 expCmdSN;
+ uint32 maxCmdSN;
+ uint32 reserved3[3];
+} _PACKED;
+
+
+#endif
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