mirror of
https://github.com/SCST-project/scst.git
synced 2026-08-16 04:06:19 +00:00
Bart Van Assche
31331411e1
already being defined in <scsi/scsi.h> on RHEL 6.0, 6.1 and 6.2 (merge r4032 from trunk). git-svn-id: http://svn.code.sf.net/p/scst/svn/branches/2.2.x@4359 d57e44dd-8a1f-0410-8b47-8ef2f437770f
525 lines
18 KiB
C
525 lines
18 KiB
C
/*
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* include/scst_const.h
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*
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* Copyright (C) 2004 - 2011 Vladislav Bolkhovitin <vst@vlnb.net>
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* Copyright (C) 2007 - 2010 ID7 Ltd.
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* Copyright (C) 2010 - 2011 SCST Ltd.
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*
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* Contains common SCST constants.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2
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* of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __SCST_CONST_H
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#define __SCST_CONST_H
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#ifndef GENERATING_UPSTREAM_PATCH
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/*
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* Include <linux/version.h> only when not converting this header file into
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* a patch for upstream review because only then the symbol LINUX_VERSION_CODE
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* is needed.
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*/
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#include <linux/version.h>
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#endif
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#include <scsi/scsi.h>
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/*
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* Version numbers, the same as for the kernel.
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*
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* Changing it don't forget to change SCST_FIO_REV in scst_vdisk.c
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* and FIO_REV in usr/fileio/common.h as well.
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*/
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#define SCST_VERSION(a, b, c, d) (((a) << 24) + ((b) << 16) + ((c) << 8) + d)
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#define SCST_VERSION_CODE SCST_VERSION(2, 2, 0, 0)
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#ifdef CONFIG_SCST_PROC
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#define SCST_VERSION_STRING_SUFFIX "-procfs"
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#else
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#define SCST_VERSION_STRING_SUFFIX
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#endif
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#define SCST_VERSION_NAME "2.2.1-pre"
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#define SCST_VERSION_STRING SCST_VERSION_NAME SCST_VERSION_STRING_SUFFIX
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#define SCST_CONST_VERSION "$Revision$"
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/*** Shared constants between user and kernel spaces ***/
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/* Max size of CDB */
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#define SCST_MAX_CDB_SIZE 16
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/* Max size of long CDB */
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#define SCST_MAX_LONG_CDB_SIZE 65536
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/* Max size of various names */
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#define SCST_MAX_NAME 50
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/* Max size of external names, like initiator name */
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#define SCST_MAX_EXTERNAL_NAME 256
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/* Max LUN. 2 bits are used for addressing method. */
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#define SCST_MAX_LUN ((1 << (16-2)) - 1)
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/*
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* Size of sense sufficient to carry standard sense data.
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* Warning! It's allocated on stack!
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*/
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#define SCST_STANDARD_SENSE_LEN 18
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/* Max size of sense */
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#define SCST_SENSE_BUFFERSIZE 96
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/*************************************************************
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** Allowed delivery statuses for cmd's delivery_status
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*************************************************************/
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#define SCST_CMD_DELIVERY_SUCCESS 0
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#define SCST_CMD_DELIVERY_FAILED -1
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#define SCST_CMD_DELIVERY_ABORTED -2
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/*************************************************************
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** Values for task management functions
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*************************************************************/
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#define SCST_ABORT_TASK 0
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#define SCST_ABORT_TASK_SET 1
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#define SCST_CLEAR_ACA 2
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#define SCST_CLEAR_TASK_SET 3
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#define SCST_LUN_RESET 4
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#define SCST_TARGET_RESET 5
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/** SCST extensions **/
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/*
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* Notifies about I_T nexus loss event in the corresponding session.
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* Aborts all tasks there, resets the reservation, if any, and sets
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* up the I_T Nexus loss UA.
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*/
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#define SCST_NEXUS_LOSS_SESS 6
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/* Aborts all tasks in the corresponding session */
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#define SCST_ABORT_ALL_TASKS_SESS 7
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/*
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* Notifies about I_T nexus loss event. Aborts all tasks in all sessions
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* of the tgt, resets the reservations, if any, and sets up the I_T Nexus
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* loss UA.
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*/
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#define SCST_NEXUS_LOSS 8
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/* Aborts all tasks in all sessions of the tgt */
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#define SCST_ABORT_ALL_TASKS 9
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/*
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* Internal TM command issued by SCST in scst_unregister_session(). It is the
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* same as SCST_NEXUS_LOSS_SESS, except:
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* - it doesn't call task_mgmt_affected_cmds_done()
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* - it doesn't call task_mgmt_fn_done()
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* - it doesn't queue NEXUS LOSS UA.
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*
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* Target drivers must NEVER use it!!
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*/
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#define SCST_UNREG_SESS_TM 10
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/*
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* Internal TM command issued by SCST in scst_pr_abort_reg(). It aborts all
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* tasks from mcmd->origin_pr_cmd->tgt_dev, except mcmd->origin_pr_cmd.
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* Additionally:
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* - it signals pr_aborting_cmpl completion when all affected
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* commands marked as aborted.
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* - it doesn't call task_mgmt_affected_cmds_done()
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* - it doesn't call task_mgmt_fn_done()
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* - it calls mcmd->origin_pr_cmd->scst_cmd_done() when all affected
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* commands aborted.
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*
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* Target drivers must NEVER use it!!
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*/
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#define SCST_PR_ABORT_ALL 11
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/*************************************************************
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** Values for mgmt cmd's status field. Codes taken from iSCSI
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*************************************************************/
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#define SCST_MGMT_STATUS_SUCCESS 0
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#define SCST_MGMT_STATUS_TASK_NOT_EXIST -1
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#define SCST_MGMT_STATUS_LUN_NOT_EXIST -2
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#define SCST_MGMT_STATUS_FN_NOT_SUPPORTED -5
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#define SCST_MGMT_STATUS_REJECTED -255
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#define SCST_MGMT_STATUS_FAILED -129
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/*************************************************************
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** SCSI LUN addressing methods. See also SAM-2 and the
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** section about eight byte LUNs.
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*************************************************************/
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enum scst_lun_addr_method {
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SCST_LUN_ADDR_METHOD_PERIPHERAL = 0,
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SCST_LUN_ADDR_METHOD_FLAT = 1,
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SCST_LUN_ADDR_METHOD_LUN = 2,
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SCST_LUN_ADDR_METHOD_EXTENDED_LUN = 3,
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};
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/*************************************************************
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** SCSI task attribute queue types
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*************************************************************/
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enum scst_cmd_queue_type {
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SCST_CMD_QUEUE_UNTAGGED = 0,
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SCST_CMD_QUEUE_SIMPLE,
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SCST_CMD_QUEUE_ORDERED,
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SCST_CMD_QUEUE_HEAD_OF_QUEUE,
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SCST_CMD_QUEUE_ACA
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};
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/*************************************************************
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** CDB flags
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*************************************************************/
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enum scst_cdb_flags {
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SCST_TRANSFER_LEN_TYPE_FIXED = 0x0001,
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SCST_SMALL_TIMEOUT = 0x0002,
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SCST_LONG_TIMEOUT = 0x0004,
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SCST_UNKNOWN_LENGTH = 0x0008,
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SCST_INFO_VALID = 0x0010, /* must be single bit */
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SCST_VERIFY_BYTCHK_MISMATCH_ALLOWED = 0x0020,
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SCST_IMPLICIT_HQ = 0x0040,
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SCST_SKIP_UA = 0x0080,
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SCST_WRITE_MEDIUM = 0x0100,
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SCST_LOCAL_CMD = 0x0200,
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SCST_FULLY_LOCAL_CMD = 0x0400,
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SCST_REG_RESERVE_ALLOWED = 0x0800,
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SCST_WRITE_EXCL_ALLOWED = 0x1000,
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SCST_EXCL_ACCESS_ALLOWED = 0x2000,
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#ifdef CONFIG_SCST_TEST_IO_IN_SIRQ
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SCST_TEST_IO_IN_SIRQ_ALLOWED = 0x4000,
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#endif
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SCST_SERIALIZED = 0x8000,
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SCST_STRICTLY_SERIALIZED = 0x10000|SCST_SERIALIZED,
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};
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/*************************************************************
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** Data direction aliases. Changing it don't forget to change
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** scst_to_tgt_dma_dir and SCST_DATA_DIR_MAX as well!!
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*************************************************************/
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#define SCST_DATA_UNKNOWN 0
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#define SCST_DATA_WRITE 1
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#define SCST_DATA_READ 2
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#define SCST_DATA_BIDI (SCST_DATA_WRITE | SCST_DATA_READ)
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#define SCST_DATA_NONE 4
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#define SCST_DATA_DIR_MAX (SCST_DATA_NONE+1)
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#ifdef CONFIG_SCST_PROC
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/*************************************************************
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** Name of the "Default" security group
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*************************************************************/
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#define SCST_DEFAULT_ACG_NAME "Default"
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#endif
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/*************************************************************
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** Default suffix for targets with NULL names
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*************************************************************/
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#define SCST_DEFAULT_TGT_NAME_SUFFIX "_target_"
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/*************************************************************
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** Sense manipulation and examination
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*************************************************************/
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#define SCST_LOAD_SENSE(key_asc_ascq) key_asc_ascq
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#define SCST_SENSE_VALID(sense) ((sense != NULL) && \
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((((const uint8_t *)(sense))[0] & 0x70) == 0x70))
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#define SCST_NO_SENSE(sense) ((sense != NULL) && \
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(((const uint8_t *)(sense))[2] == 0))
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/*************************************************************
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** Sense data for the appropriate errors. Can be used with
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** scst_set_cmd_error()
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*************************************************************/
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#define scst_sense_no_sense NO_SENSE, 0x00, 0
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#define scst_sense_hardw_error HARDWARE_ERROR, 0x44, 0
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#define scst_sense_aborted_command ABORTED_COMMAND, 0x00, 0
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#define scst_sense_invalid_opcode ILLEGAL_REQUEST, 0x20, 0
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#define scst_sense_invalid_field_in_cdb ILLEGAL_REQUEST, 0x24, 0
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#define scst_sense_invalid_field_in_parm_list ILLEGAL_REQUEST, 0x26, 0
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#define scst_sense_parameter_value_invalid ILLEGAL_REQUEST, 0x26, 2
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#define scst_sense_invalid_release ILLEGAL_REQUEST, 0x26, 4
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#define scst_sense_parameter_list_length_invalid \
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ILLEGAL_REQUEST, 0x1A, 0
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#define scst_sense_reset_UA UNIT_ATTENTION, 0x29, 0
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#define scst_sense_nexus_loss_UA UNIT_ATTENTION, 0x29, 0x7
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#define scst_sense_saving_params_unsup ILLEGAL_REQUEST, 0x39, 0
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#define scst_sense_lun_not_supported ILLEGAL_REQUEST, 0x25, 0
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#define scst_sense_data_protect DATA_PROTECT, 0x00, 0
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#define scst_sense_miscompare_error MISCOMPARE, 0x1D, 0
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#define scst_sense_block_out_range_error ILLEGAL_REQUEST, 0x21, 0
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#define scst_sense_medium_changed_UA UNIT_ATTENTION, 0x28, 0
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#define scst_sense_read_error MEDIUM_ERROR, 0x11, 0
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#define scst_sense_write_error MEDIUM_ERROR, 0x03, 0
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#define scst_sense_not_ready NOT_READY, 0x04, 0x10
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#define scst_sense_invalid_message ILLEGAL_REQUEST, 0x49, 0
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#define scst_sense_cleared_by_another_ini_UA UNIT_ATTENTION, 0x2F, 0
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#define scst_sense_capacity_data_changed UNIT_ATTENTION, 0x2A, 0x9
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#define scst_sense_reservation_preempted UNIT_ATTENTION, 0x2A, 0x03
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#define scst_sense_reservation_released UNIT_ATTENTION, 0x2A, 0x04
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#define scst_sense_registrations_preempted UNIT_ATTENTION, 0x2A, 0x05
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#define scst_sense_asym_access_state_changed UNIT_ATTENTION, 0x2A, 0x06
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#define scst_sense_reported_luns_data_changed UNIT_ATTENTION, 0x3F, 0xE
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#define scst_sense_inquery_data_changed UNIT_ATTENTION, 0x3F, 0x3
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/*************************************************************
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* SCSI opcodes not listed anywhere else
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*************************************************************/
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#define INIT_ELEMENT_STATUS 0x07
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#define INIT_ELEMENT_STATUS_RANGE 0x37
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#define PREVENT_ALLOW_MEDIUM 0x1E
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 38) \
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&& (!defined(RHEL_MAJOR) || RHEL_MAJOR -0 <= 5)
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#define READ_ATTRIBUTE 0x8C
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#endif
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#define REQUEST_VOLUME_ADDRESS 0xB5
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 38) \
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&& (!defined(RHEL_MAJOR) || RHEL_MAJOR -0 <= 5)
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#define WRITE_ATTRIBUTE 0x8D
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#endif
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#define WRITE_VERIFY_16 0x8E
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#define VERIFY_6 0x13
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#ifndef VERIFY_12
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#define VERIFY_12 0xAF
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#endif
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#ifndef GENERATING_UPSTREAM_PATCH
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/*
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* The constants below have been defined in the kernel header <scsi/scsi.h>
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* and hence are not needed when this header file is included in kernel code.
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* The definitions below are only used when this header file is included during
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* compilation of SCST's user space components.
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*/
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#ifndef READ_16
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#define READ_16 0x88
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#endif
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#ifndef WRITE_16
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#define WRITE_16 0x8a
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#endif
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#ifndef VERIFY_16
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#define VERIFY_16 0x8f
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#endif
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#ifndef SERVICE_ACTION_IN
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#define SERVICE_ACTION_IN 0x9e
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#endif
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#ifndef SAI_READ_CAPACITY_16
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/* values for service action in */
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#define SAI_READ_CAPACITY_16 0x10
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#endif
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#endif
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#ifndef GENERATING_UPSTREAM_PATCH
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#ifndef REPORT_LUNS
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#define REPORT_LUNS 0xa0
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#endif
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#endif
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33)
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/*
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* From <scsi/scsi.h>. See also commit
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* f57e4502cea471c69782d4790c71d8414ab49a9d.
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*/
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#define UNMAP 0x42
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#endif
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 28)
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/*
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* From <linux/fs.h>. See also commit
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* d30a2605be9d5132d95944916e8f578fcfe4f976.
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*/
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#define BLKDISCARD _IO(0x12,119)
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#endif
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/*************************************************************
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** SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft
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** T10/1561-D Revision 4 Draft dated 7th November 2002.
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*************************************************************/
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#define SAM_STAT_GOOD 0x00
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#define SAM_STAT_CHECK_CONDITION 0x02
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#define SAM_STAT_CONDITION_MET 0x04
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#define SAM_STAT_BUSY 0x08
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#define SAM_STAT_INTERMEDIATE 0x10
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#define SAM_STAT_INTERMEDIATE_CONDITION_MET 0x14
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#define SAM_STAT_RESERVATION_CONFLICT 0x18
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#define SAM_STAT_COMMAND_TERMINATED 0x22 /* obsolete in SAM-3 */
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#define SAM_STAT_TASK_SET_FULL 0x28
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#define SAM_STAT_ACA_ACTIVE 0x30
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#define SAM_STAT_TASK_ABORTED 0x40
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/*************************************************************
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** Control byte field in CDB
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*************************************************************/
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#define CONTROL_BYTE_LINK_BIT 0x01
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#define CONTROL_BYTE_NACA_BIT 0x04
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/*************************************************************
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** Byte 1 in INQUIRY CDB
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*************************************************************/
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#define SCST_INQ_EVPD 0x01
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/*************************************************************
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** Byte 3 in Standard INQUIRY data
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*************************************************************/
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#define SCST_INQ_BYTE3 3
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#define SCST_INQ_NORMACA_BIT 0x20
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/*************************************************************
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** TPGS field in byte 5 of the INQUIRY response (SPC-4).
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*************************************************************/
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enum {
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SCST_INQ_TPGS_MODE_IMPLICIT = 0x10,
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SCST_INQ_TPGS_MODE_EXPLICIT = 0x20,
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};
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/*************************************************************
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** Byte 2 in RESERVE_10 CDB
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*************************************************************/
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#define SCST_RES_3RDPTY 0x10
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#define SCST_RES_LONGID 0x02
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/*************************************************************
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** Values for the control mode page TST field
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*************************************************************/
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#define SCST_CONTR_MODE_ONE_TASK_SET 0
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#define SCST_CONTR_MODE_SEP_TASK_SETS 1
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/*******************************************************************
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** Values for the control mode page QUEUE ALGORITHM MODIFIER field
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*******************************************************************/
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#define SCST_CONTR_MODE_QUEUE_ALG_RESTRICTED_REORDER 0
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#define SCST_CONTR_MODE_QUEUE_ALG_UNRESTRICTED_REORDER 1
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/*************************************************************
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** Values for the control mode page D_SENSE field
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*************************************************************/
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#define SCST_CONTR_MODE_FIXED_SENSE 0
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#define SCST_CONTR_MODE_DESCR_SENSE 1
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/*************************************************************
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** TransportID protocol identifiers
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*************************************************************/
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#define SCSI_TRANSPORTID_PROTOCOLID_FCP2 0
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#define SCSI_TRANSPORTID_PROTOCOLID_SPI5 1
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#define SCSI_TRANSPORTID_PROTOCOLID_SRP 4
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#define SCSI_TRANSPORTID_PROTOCOLID_ISCSI 5
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#define SCSI_TRANSPORTID_PROTOCOLID_SAS 6
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/**
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* enum scst_tg_state - SCSI target port group asymmetric access state.
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*
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* See also the documentation of the REPORT TARGET PORT GROUPS command in SPC-4.
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*/
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enum scst_tg_state {
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SCST_TG_STATE_OPTIMIZED = 0x0,
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SCST_TG_STATE_NONOPTIMIZED = 0x1,
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SCST_TG_STATE_STANDBY = 0x2,
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SCST_TG_STATE_UNAVAILABLE = 0x3,
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SCST_TG_STATE_LBA_DEPENDENT = 0x4,
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SCST_TG_STATE_OFFLINE = 0xe,
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SCST_TG_STATE_TRANSITIONING = 0xf,
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};
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/**
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* Target port group preferred bit.
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*
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* See also the documentation of the REPORT TARGET PORT GROUPS command in SPC-4.
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*/
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enum {
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SCST_TG_PREFERRED = 0x80,
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};
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/**
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* enum scst_tg_sup - Supported SCSI target port group states.
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*
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* See also the documentation of the REPORT TARGET PORT GROUPS command in SPC-4.
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*/
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enum scst_tg_sup {
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SCST_TG_SUP_OPTIMIZED = 0x01,
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SCST_TG_SUP_NONOPTIMIZED = 0x02,
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SCST_TG_SUP_STANDBY = 0x04,
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SCST_TG_SUP_UNAVAILABLE = 0x08,
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SCST_TG_SUP_LBA_DEPENDENT = 0x10,
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SCST_TG_SUP_OFFLINE = 0x40,
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|
SCST_TG_SUP_TRANSITION = 0x80,
|
|
};
|
|
|
|
/*************************************************************
|
|
** Misc SCSI constants
|
|
*************************************************************/
|
|
#define SCST_SENSE_ASC_UA_RESET 0x29
|
|
#define BYTCHK 0x02
|
|
#define POSITION_LEN_SHORT 20
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|
#define POSITION_LEN_LONG 32
|
|
|
|
/*************************************************************
|
|
** Various timeouts
|
|
*************************************************************/
|
|
#define SCST_DEFAULT_TIMEOUT (60 * HZ)
|
|
|
|
#define SCST_GENERIC_CHANGER_TIMEOUT (3 * HZ)
|
|
#define SCST_GENERIC_CHANGER_LONG_TIMEOUT (14000 * HZ)
|
|
|
|
#define SCST_GENERIC_PROCESSOR_TIMEOUT (3 * HZ)
|
|
#define SCST_GENERIC_PROCESSOR_LONG_TIMEOUT (14000 * HZ)
|
|
|
|
#define SCST_GENERIC_TAPE_SMALL_TIMEOUT (3 * HZ)
|
|
#define SCST_GENERIC_TAPE_REG_TIMEOUT (900 * HZ)
|
|
#define SCST_GENERIC_TAPE_LONG_TIMEOUT (14000 * HZ)
|
|
|
|
#define SCST_GENERIC_MODISK_SMALL_TIMEOUT (3 * HZ)
|
|
#define SCST_GENERIC_MODISK_REG_TIMEOUT (900 * HZ)
|
|
#define SCST_GENERIC_MODISK_LONG_TIMEOUT (14000 * HZ)
|
|
|
|
#define SCST_GENERIC_DISK_SMALL_TIMEOUT (3 * HZ)
|
|
#define SCST_GENERIC_DISK_REG_TIMEOUT (60 * HZ)
|
|
#define SCST_GENERIC_DISK_LONG_TIMEOUT (3600 * HZ)
|
|
|
|
#define SCST_GENERIC_RAID_TIMEOUT (3 * HZ)
|
|
#define SCST_GENERIC_RAID_LONG_TIMEOUT (14000 * HZ)
|
|
|
|
#define SCST_GENERIC_CDROM_SMALL_TIMEOUT (3 * HZ)
|
|
#define SCST_GENERIC_CDROM_REG_TIMEOUT (900 * HZ)
|
|
#define SCST_GENERIC_CDROM_LONG_TIMEOUT (14000 * HZ)
|
|
|
|
#define SCST_MAX_OTHER_TIMEOUT (14000 * HZ)
|
|
|
|
/*************************************************************
|
|
** I/O grouping attribute string values. Must match constants
|
|
** w/o '_STR' suffix!
|
|
*************************************************************/
|
|
#define SCST_IO_GROUPING_AUTO_STR "auto"
|
|
#define SCST_IO_GROUPING_THIS_GROUP_ONLY_STR "this_group_only"
|
|
#define SCST_IO_GROUPING_NEVER_STR "never"
|
|
|
|
/*************************************************************
|
|
** Threads pool type attribute string values.
|
|
** Must match scst_dev_type_threads_pool_type!
|
|
*************************************************************/
|
|
#define SCST_THREADS_POOL_PER_INITIATOR_STR "per_initiator"
|
|
#define SCST_THREADS_POOL_SHARED_STR "shared"
|
|
|
|
/*************************************************************
|
|
** Misc constants
|
|
*************************************************************/
|
|
#define SCST_SYSFS_BLOCK_SIZE PAGE_SIZE
|
|
|
|
#define SCST_PR_DIR "/var/lib/scst/pr"
|
|
|
|
#define TID_COMMON_SIZE 24
|
|
|
|
#define SCST_SYSFS_KEY_MARK "[key]"
|
|
|
|
#define SCST_MIN_REL_TGT_ID 1
|
|
#define SCST_MAX_REL_TGT_ID 65535
|
|
|
|
#endif /* __SCST_CONST_H */
|