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scst/scst/include/scst_const.h
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Vladislav Bolkhovitin 04556369b4 - Fix 2 lockdep complains 
- Preliminary update for 2.6.35



git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1864 d57e44dd-8a1f-0410-8b47-8ef2f437770f
2010-07-22 17:38:51 +00:00

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/*
* include/scst_const.h
*
* Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
* Copyright (C) 2007 - 2010 ID7 Ltd.
*
* Contains common SCST constants.
*
* 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, version 2
* of the License.
*
* 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.
*/
#ifndef __SCST_CONST_H
#define __SCST_CONST_H
#ifndef GENERATING_UPSTREAM_PATCH
/*
* Include <linux/version.h> only when not converting this header file into
* a patch for upstream review because only then the symbol LINUX_VERSION_CODE
* is needed.
*/
#include <linux/version.h>
#endif
#include <scsi/scsi.h>
#define SCST_CONST_VERSION "$Revision$"
/*** Shared constants between user and kernel spaces ***/
/* Max size of CDB */
#define SCST_MAX_CDB_SIZE 16
/* Max size of various names */
#define SCST_MAX_NAME 50
/* Max size of external names, like initiator name */
#define SCST_MAX_EXTERNAL_NAME 256
/*
* Size of sense sufficient to carry standard sense data.
* Warning! It's allocated on stack!
*/
#define SCST_STANDARD_SENSE_LEN 18
/* Max size of sense */
#define SCST_SENSE_BUFFERSIZE 96
/*************************************************************
** Allowed delivery statuses for cmd's delivery_status
*************************************************************/
#define SCST_CMD_DELIVERY_SUCCESS 0
#define SCST_CMD_DELIVERY_FAILED -1
#define SCST_CMD_DELIVERY_ABORTED -2
/*************************************************************
** Values for task management functions
*************************************************************/
#define SCST_ABORT_TASK 0
#define SCST_ABORT_TASK_SET 1
#define SCST_CLEAR_ACA 2
#define SCST_CLEAR_TASK_SET 3
#define SCST_LUN_RESET 4
#define SCST_TARGET_RESET 5
/** SCST extensions **/
/*
* Notifies about I_T nexus loss event in the corresponding session.
* Aborts all tasks there, resets the reservation, if any, and sets
* up the I_T Nexus loss UA.
*/
#define SCST_NEXUS_LOSS_SESS 6
/* Aborts all tasks in the corresponding session */
#define SCST_ABORT_ALL_TASKS_SESS 7
/*
* Notifies about I_T nexus loss event. Aborts all tasks in all sessions
* of the tgt, resets the reservations, if any, and sets up the I_T Nexus
* loss UA.
*/
#define SCST_NEXUS_LOSS 8
/* Aborts all tasks in all sessions of the tgt */
#define SCST_ABORT_ALL_TASKS 9
/*
* Internal TM command issued by SCST in scst_unregister_session(). It is the
* same as SCST_NEXUS_LOSS_SESS, except:
* - it doesn't call task_mgmt_affected_cmds_done()
* - it doesn't call task_mgmt_fn_done()
* - it doesn't queue NEXUS LOSS UA.
*
* Target drivers must NEVER use it!!
*/
#define SCST_UNREG_SESS_TM 10
/*
* Internal TM command issued by SCST in scst_pr_abort_reg(). It aborts all
* tasks from mcmd->origin_pr_cmd->tgt_dev, except mcmd->origin_pr_cmd.
* Additionally:
* - it signals pr_aborting_cmpl completion when all affected
* commands marked as aborted.
* - it doesn't call task_mgmt_affected_cmds_done()
* - it doesn't call task_mgmt_fn_done()
* - it calls mcmd->origin_pr_cmd->scst_cmd_done() when all affected
* commands aborted.
*
* Target drivers must NEVER use it!!
*/
#define SCST_PR_ABORT_ALL 11
/*************************************************************
** Values for mgmt cmd's status field. Codes taken from iSCSI
*************************************************************/
#define SCST_MGMT_STATUS_SUCCESS 0
#define SCST_MGMT_STATUS_TASK_NOT_EXIST -1
#define SCST_MGMT_STATUS_LUN_NOT_EXIST -2
#define SCST_MGMT_STATUS_FN_NOT_SUPPORTED -5
#define SCST_MGMT_STATUS_REJECTED -255
#define SCST_MGMT_STATUS_FAILED -129
/*************************************************************
** SCSI task attribute queue types
*************************************************************/
enum scst_cmd_queue_type {
SCST_CMD_QUEUE_UNTAGGED = 0,
SCST_CMD_QUEUE_SIMPLE,
SCST_CMD_QUEUE_ORDERED,
SCST_CMD_QUEUE_HEAD_OF_QUEUE,
SCST_CMD_QUEUE_ACA
};
/*************************************************************
** CDB flags
*************************************************************/
enum scst_cdb_flags {
SCST_TRANSFER_LEN_TYPE_FIXED = 0x0001,
SCST_SMALL_TIMEOUT = 0x0002,
SCST_LONG_TIMEOUT = 0x0004,
SCST_UNKNOWN_LENGTH = 0x0008,
SCST_INFO_VALID = 0x0010, /* must be single bit */
SCST_VERIFY_BYTCHK_MISMATCH_ALLOWED = 0x0020,
SCST_IMPLICIT_HQ = 0x0040,
SCST_SKIP_UA = 0x0080,
SCST_WRITE_MEDIUM = 0x0100,
SCST_LOCAL_CMD = 0x0200,
SCST_FULLY_LOCAL_CMD = 0x0400,
SCST_REG_RESERVE_ALLOWED = 0x0800,
SCST_WRITE_EXCL_ALLOWED = 0x1000,
SCST_EXCL_ACCESS_ALLOWED = 0x2000,
#ifdef CONFIG_SCST_TEST_IO_IN_SIRQ
SCST_TEST_IO_IN_SIRQ_ALLOWED = 0x8000,
#endif
};
/*************************************************************
** Data direction aliases. Changing it don't forget to change
** scst_to_tgt_dma_dir as well!!
*************************************************************/
#define SCST_DATA_UNKNOWN 0
#define SCST_DATA_WRITE 1
#define SCST_DATA_READ 2
#define SCST_DATA_BIDI (SCST_DATA_WRITE | SCST_DATA_READ)
#define SCST_DATA_NONE 4
#ifdef CONFIG_SCST_PROC
/*************************************************************
** Name of the "Default" security group
*************************************************************/
#define SCST_DEFAULT_ACG_NAME "Default"
#endif
/*************************************************************
** Default suffix for targets with NULL names
*************************************************************/
#define SCST_DEFAULT_TGT_NAME_SUFFIX "_target_"
/*************************************************************
** Sense manipulation and examination
*************************************************************/
#define SCST_LOAD_SENSE(key_asc_ascq) key_asc_ascq
#define SCST_SENSE_VALID(sense) ((sense != NULL) && \
((((const uint8_t *)(sense))[0] & 0x70) == 0x70))
#define SCST_NO_SENSE(sense) ((sense != NULL) && \
(((const uint8_t *)(sense))[2] == 0))
/*************************************************************
** Sense data for the appropriate errors. Can be used with
** scst_set_cmd_error()
*************************************************************/
#define scst_sense_no_sense NO_SENSE, 0x00, 0
#define scst_sense_hardw_error HARDWARE_ERROR, 0x44, 0
#define scst_sense_aborted_command ABORTED_COMMAND, 0x00, 0
#define scst_sense_invalid_opcode ILLEGAL_REQUEST, 0x20, 0
#define scst_sense_invalid_field_in_cdb ILLEGAL_REQUEST, 0x24, 0
#define scst_sense_invalid_field_in_parm_list ILLEGAL_REQUEST, 0x26, 0
#define scst_sense_parameter_value_invalid ILLEGAL_REQUEST, 0x26, 2
#define scst_sense_invalid_release ILLEGAL_REQUEST, 0x26, 4
#define scst_sense_parameter_list_length_invalid \
ILLEGAL_REQUEST, 0x1A, 0
#define scst_sense_reset_UA UNIT_ATTENTION, 0x29, 0
#define scst_sense_nexus_loss_UA UNIT_ATTENTION, 0x29, 0x7
#define scst_sense_saving_params_unsup ILLEGAL_REQUEST, 0x39, 0
#define scst_sense_lun_not_supported ILLEGAL_REQUEST, 0x25, 0
#define scst_sense_data_protect DATA_PROTECT, 0x00, 0
#define scst_sense_miscompare_error MISCOMPARE, 0x1D, 0
#define scst_sense_block_out_range_error ILLEGAL_REQUEST, 0x21, 0
#define scst_sense_medium_changed_UA UNIT_ATTENTION, 0x28, 0
#define scst_sense_read_error MEDIUM_ERROR, 0x11, 0
#define scst_sense_write_error MEDIUM_ERROR, 0x03, 0
#define scst_sense_not_ready NOT_READY, 0x04, 0x10
#define scst_sense_invalid_message ILLEGAL_REQUEST, 0x49, 0
#define scst_sense_cleared_by_another_ini_UA UNIT_ATTENTION, 0x2F, 0
#define scst_sense_capacity_data_changed UNIT_ATTENTION, 0x2A, 0x9
#define scst_sense_reservation_preempted UNIT_ATTENTION, 0x2A, 0x03
#define scst_sense_reservation_released UNIT_ATTENTION, 0x2A, 0x04
#define scst_sense_registrations_preempted UNIT_ATTENTION, 0x2A, 0x05
#define scst_sense_reported_luns_data_changed UNIT_ATTENTION, 0x3F, 0xE
#define scst_sense_inquery_data_changed UNIT_ATTENTION, 0x3F, 0x3
/*************************************************************
* SCSI opcodes not listed anywhere else
*************************************************************/
#define REPORT_DEVICE_IDENTIFIER 0xA3
#define INIT_ELEMENT_STATUS 0x07
#define INIT_ELEMENT_STATUS_RANGE 0x37
#define PREVENT_ALLOW_MEDIUM 0x1E
#define READ_ATTRIBUTE 0x8C
#define REQUEST_VOLUME_ADDRESS 0xB5
#define WRITE_ATTRIBUTE 0x8D
#define WRITE_VERIFY_16 0x8E
#define VERIFY_6 0x13
#ifndef VERIFY_12
#define VERIFY_12 0xAF
#endif
#ifndef GENERATING_UPSTREAM_PATCH
/*
* The constants below have been defined in the kernel header <scsi/scsi.h>
* and hence are not needed when this header file is included in kernel code.
* The definitions below are only used when this header file is included during
* compilation of SCST's user space components.
*/
#ifndef READ_16
#define READ_16 0x88
#endif
#ifndef WRITE_16
#define WRITE_16 0x8a
#endif
#ifndef VERIFY_16
#define VERIFY_16 0x8f
#endif
#ifndef SERVICE_ACTION_IN
#define SERVICE_ACTION_IN 0x9e
#endif
#ifndef SAI_READ_CAPACITY_16
/* values for service action in */
#define SAI_READ_CAPACITY_16 0x10
#endif
#endif
#ifndef GENERATING_UPSTREAM_PATCH
#ifndef REPORT_LUNS
#define REPORT_LUNS 0xa0
#endif
#endif
/*************************************************************
** SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft
** T10/1561-D Revision 4 Draft dated 7th November 2002.
*************************************************************/
#define SAM_STAT_GOOD 0x00
#define SAM_STAT_CHECK_CONDITION 0x02
#define SAM_STAT_CONDITION_MET 0x04
#define SAM_STAT_BUSY 0x08
#define SAM_STAT_INTERMEDIATE 0x10
#define SAM_STAT_INTERMEDIATE_CONDITION_MET 0x14
#define SAM_STAT_RESERVATION_CONFLICT 0x18
#define SAM_STAT_COMMAND_TERMINATED 0x22 /* obsolete in SAM-3 */
#define SAM_STAT_TASK_SET_FULL 0x28
#define SAM_STAT_ACA_ACTIVE 0x30
#define SAM_STAT_TASK_ABORTED 0x40
/*************************************************************
** Control byte field in CDB
*************************************************************/
#define CONTROL_BYTE_LINK_BIT 0x01
#define CONTROL_BYTE_NACA_BIT 0x04
/*************************************************************
** Byte 1 in INQUIRY CDB
*************************************************************/
#define SCST_INQ_EVPD 0x01
/*************************************************************
** Byte 3 in Standard INQUIRY data
*************************************************************/
#define SCST_INQ_BYTE3 3
#define SCST_INQ_NORMACA_BIT 0x20
/*************************************************************
** Byte 2 in RESERVE_10 CDB
*************************************************************/
#define SCST_RES_3RDPTY 0x10
#define SCST_RES_LONGID 0x02
/*************************************************************
** Values for the control mode page TST field
*************************************************************/
#define SCST_CONTR_MODE_ONE_TASK_SET 0
#define SCST_CONTR_MODE_SEP_TASK_SETS 1
/*******************************************************************
** Values for the control mode page QUEUE ALGORITHM MODIFIER field
*******************************************************************/
#define SCST_CONTR_MODE_QUEUE_ALG_RESTRICTED_REORDER 0
#define SCST_CONTR_MODE_QUEUE_ALG_UNRESTRICTED_REORDER 1
/*************************************************************
** Values for the control mode page D_SENSE field
*************************************************************/
#define SCST_CONTR_MODE_FIXED_SENSE 0
#define SCST_CONTR_MODE_DESCR_SENSE 1
/*************************************************************
** TransportID protocol identifiers
*************************************************************/
#define SCSI_TRANSPORTID_PROTOCOLID_FCP2 0
#define SCSI_TRANSPORTID_PROTOCOLID_SPI5 1
#define SCSI_TRANSPORTID_PROTOCOLID_SRP 4
#define SCSI_TRANSPORTID_PROTOCOLID_ISCSI 5
#define SCSI_TRANSPORTID_PROTOCOLID_SAS 6
/*************************************************************
** Misc SCSI constants
*************************************************************/
#define SCST_SENSE_ASC_UA_RESET 0x29
#define BYTCHK 0x02
#define POSITION_LEN_SHORT 20
#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 */
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