/* * include/scst_const.h * * Copyright (C) 2004 - 2018 Vladislav Bolkhovitin * Copyright (C) 2007 - 2018 Western Digital Corporation * * Contains common SCST constants. This file supposed to be included * from both kernel and user spaces. * * 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 only when not converting this header file into * a patch for upstream review because only then the symbol LINUX_VERSION_CODE * is needed. */ #include #endif #include #ifndef __KERNEL__ #include #endif #include "scst_itf_ver.h" /* * Version numbers, the same as for the kernel. * * Changing it don't forget to change SCST_FIO_REV in scst_vdisk.c * and FIO_REV in usr/fileio/common.h as well. */ #define SCST_VERSION(a, b, c, d) (((a) << 24) + ((b) << 16) + ((c) << 8) + d) #define SCST_VERSION_CODE SCST_VERSION(3, 4, 0, 0) #define SCST_VERSION_STRING_SUFFIX #define SCST_VERSION_NAME "3.4.0-pre1" #define SCST_VERSION_STRING SCST_VERSION_NAME SCST_VERSION_STRING_SUFFIX #define SCST_CONST_VERSION SCST_CONST_INTF_VER /*** Shared constants between user and kernel spaces ***/ /* Max size of CDB */ #define SCST_MAX_CDB_SIZE 16 /* Max size of long CDB */ #define SCST_MAX_LONG_CDB_SIZE 65536 /* Max size of various names */ #define SCST_MAX_NAME 50 /* Max size of external names, like initiator name */ #define SCST_MAX_EXTERNAL_NAME 256 /* Max LUN. 2 bits are used for addressing method. */ #define SCST_MAX_LUN ((1 << (16-2)) - 1) /* * 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 252 /************************************************************* ** 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 ** ** !! Adding new extensions don't forget to update ** !! scst_tm_fn_name as well! **/ /* * Notifies about I_T nexus loss event in the corresponding session. * Aborts all tasks there 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, and sets up in them 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 /* Extra status meaning that the received stage completed, not done */ #define SCST_MGMT_STATUS_RECEIVED_STAGE_COMPLETED 200 /************************************************************* ** SCSI LUN addressing methods. See also SAM-2 and the ** section about eight byte LUNs. *************************************************************/ enum scst_lun_addr_method { SCST_LUN_ADDR_METHOD_PERIPHERAL = 0, SCST_LUN_ADDR_METHOD_FLAT = 1, SCST_LUN_ADDR_METHOD_LUN = 2, SCST_LUN_ADDR_METHOD_EXTENDED_LUN = 3, }; /************************************************************* ** 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. All must be single bit fit in int32. Bit fields ** approach (unsigned int x:1) was not used, because those ** flags supposed to be passed to the user space where another ** compiler with another bitfields layout can be used. ***************************************************************/ enum scst_cdb_flags { /* * !! Both timeouts must be the lowest bits to match * !! scst_generic_parse() expectations! */ SCST_SMALL_TIMEOUT = 0x0001, SCST_LONG_TIMEOUT = 0x0002, #define SCST_BOTH_TIMEOUTS (SCST_SMALL_TIMEOUT | SCST_LONG_TIMEOUT) SCST_TRANSFER_LEN_TYPE_FIXED = 0x0004, SCST_UNKNOWN_LBA = 0x0008, SCST_UNKNOWN_LENGTH = 0x0010, SCST_INFO_VALID = 0x0020, /* * Set if LBA not defined for this CDB. The "NOT" approach * was used to make sure that all dev handlers either init * cmd->lba or set this flag (for backward compatibility) */ SCST_LBA_NOT_VALID = 0x0040, SCST_IMPLICIT_HQ = 0x0080, SCST_SKIP_UA = 0x0100, SCST_WRITE_MEDIUM = 0x0200, SCST_LOCAL_CMD = 0x0400, /* * Set if CDB is fully locally handled by SCST. Dev handlers * parse() and dev_done() not called for such commands */ SCST_FULLY_LOCAL_CMD = 0x0800, SCST_REG_RESERVE_ALLOWED = 0x1000, SCST_WRITE_EXCL_ALLOWED = 0x2000, SCST_EXCL_ACCESS_ALLOWED = 0x4000, #ifdef CONFIG_SCST_TEST_IO_IN_SIRQ SCST_TEST_IO_IN_SIRQ_ALLOWED = 0x8000, #endif SCST_SERIALIZED = 0x10000, SCST_STRICTLY_SERIALIZED = 0x20000|SCST_SERIALIZED, SCST_CAN_GEN_3PARTY_COMMANDS = 0x40000, SCST_DESCRIPTORS_BASED = 0x80000, SCST_SCSI_ATOMIC = 0x100000, }; /************************************************************* ** Data direction aliases. Changing it don't forget to change ** scst_to_tgt_dma_dir and SCST_DATA_DIR_MAX as well!! *************************************************************/ typedef enum scst_data_direction { SCST_DATA_UNKNOWN = 0, SCST_DATA_WRITE = 1, SCST_DATA_READ = 2, SCST_DATA_BIDI = (SCST_DATA_WRITE | SCST_DATA_READ), SCST_DATA_NONE = 4, } scst_data_direction; #define SCST_DATA_DIR_MAX (SCST_DATA_NONE+1) /************************************************************* ** 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 static inline int scst_sense_valid(const uint8_t *sense) { return (sense != NULL) && ((sense[0] & 0x70) == 0x70); } static inline int scst_no_sense(const uint8_t *sense) { return (sense != NULL) && (sense[2] == 0); } static inline int scst_sense_response_code(const uint8_t *sense) { return sense[0] & 0x7F; } /************************************************************* ** Sense data for the appropriate errors. Can be used with ** scst_set_cmd_error(). Column order: key, ASC, ASCQ. See ** also http://www.t10.org/lists/asc-num.htm. *************************************************************/ /* NO_SENSE is 0 */ #define scst_sense_no_sense NO_SENSE, 0x00, 0 /* NOT_READY is 2 */ #define scst_sense_format_in_progress NOT_READY, 0x04, 0x04 #define scst_sense_alua_transitioning NOT_READY, 0x04, 0x0A #define scst_sense_alua_standby NOT_READY, 0x04, 0x0B #define scst_sense_alua_unav NOT_READY, 0x04, 0x0C #define scst_sense_no_medium NOT_READY, 0x3a, 0 /* MEDIUM_ERROR is 3 */ #define scst_sense_write_error MEDIUM_ERROR, 0x03, 0 #define scst_sense_read_error MEDIUM_ERROR, 0x11, 0 /* HARDWARE_ERROR is 4 */ #define scst_sense_hardw_error HARDWARE_ERROR, 0x44, 0 /* non-retriable */ #define scst_sense_set_target_pgs_failed HARDWARE_ERROR, 0x67, 0xA /* ILLEGAL_REQUEST is 5 */ #define scst_sense_operation_in_progress ILLEGAL_REQUEST, 0x0, 0x16 #define scst_sense_parameter_list_length_invalid ILLEGAL_REQUEST, 0x1A, 0 #define scst_sense_invalid_opcode ILLEGAL_REQUEST, 0x20, 0 #define scst_sense_block_out_range_error ILLEGAL_REQUEST, 0x21, 0 /* Don't use it directly, use scst_set_invalid_field_in_cdb() instead! */ #define scst_sense_invalid_field_in_cdb ILLEGAL_REQUEST, 0x24, 0 #define scst_sense_lun_not_supported ILLEGAL_REQUEST, 0x25, 0 /* Don't use it directly, use scst_set_invalid_field_in_parm_list() instead! */ #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_too_many_target_descriptors ILLEGAL_REQUEST, 0x26, 6 #define scst_sense_unsupported_tgt_descr_type ILLEGAL_REQUEST, 0x26, 7 #define scst_sense_too_many_segment_descriptors ILLEGAL_REQUEST, 0x26, 8 #define scst_sense_unsupported_seg_descr_type ILLEGAL_REQUEST, 0x26, 9 #define scst_sense_inline_data_length_exceeded ILLEGAL_REQUEST, 0x26, 0xB #define scst_sense_saving_params_unsup ILLEGAL_REQUEST, 0x39, 0 #define scst_sense_invalid_message ILLEGAL_REQUEST, 0x49, 0 #define scst_sense_parameter_list_length_invalid ILLEGAL_REQUEST, 0x1A, 0 #define scst_sense_invalid_field_in_command_information_unit ILLEGAL_REQUEST, 0xE, 0x3 /* UNIT_ATTENTION is 6 */ #define scst_sense_medium_changed_UA UNIT_ATTENTION, 0x28, 0 #define scst_sense_reset_UA UNIT_ATTENTION, 0x29, 0 #define scst_sense_nexus_loss_UA UNIT_ATTENTION, 0x29, 0x7 #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_asym_access_state_changed UNIT_ATTENTION, 0x2A, 0x06 #define scst_sense_capacity_data_changed UNIT_ATTENTION, 0x2A, 0x9 #define scst_sense_cleared_by_another_ini_UA UNIT_ATTENTION, 0x2F, 0 #define scst_sense_tp_soft_threshold_reached UNIT_ATTENTION, 0x38, 0x7 #define scst_sense_inquiry_data_changed UNIT_ATTENTION, 0x3F, 0x3 #define scst_sense_reported_luns_data_changed UNIT_ATTENTION, 0x3F, 0xE /* DATA_PROTECT is 7 */ #define scst_sense_data_protect DATA_PROTECT, 0x00, 0 #define scst_space_allocation_failed_write_protect DATA_PROTECT, 0x27, 7 /* ABORTED_COMMAND is 0xb */ #define scst_sense_aborted_command ABORTED_COMMAND, 0x00, 0 #define scst_logical_block_guard_check_failed ABORTED_COMMAND, 0x10, 1 #define scst_logical_block_app_tag_check_failed ABORTED_COMMAND, 0x10, 2 #define scst_logical_block_ref_tag_check_failed ABORTED_COMMAND, 0x10, 3 #define scst_sense_internal_failure ABORTED_COMMAND, 0x44, 0 /* retriable */ /* MISCOMPARE is 0xe */ #define scst_sense_miscompare_error MISCOMPARE, 0x1D, 0 /************************************************************* * SCSI opcodes not listed anywhere else *************************************************************/ #define INIT_ELEMENT_STATUS 0x07 #define INIT_ELEMENT_STATUS_RANGE 0x37 #define PREVENT_ALLOW_MEDIUM 0x1E #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 38) \ && (!defined(RHEL_MAJOR) || RHEL_MAJOR -0 <= 5) #define READ_ATTRIBUTE 0x8C #endif #define REQUEST_VOLUME_ADDRESS 0xB5 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 38) \ && (!defined(RHEL_MAJOR) || RHEL_MAJOR -0 <= 5) #define WRITE_ATTRIBUTE 0x8D #endif #if (!defined(__KERNEL__) || LINUX_VERSION_CODE < KERNEL_VERSION(4, 12, 0)) &&\ !defined(WRITE_VERIFY_16) #define WRITE_VERIFY_16 0x8E #endif #define VERIFY_6 0x13 #ifndef VERIFY_12 #define VERIFY_12 0xAF #endif #if !defined(GENERATING_UPSTREAM_PATCH) || \ LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 38) /* * The constants below have been defined in the kernel header * 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 GET_EVENT_STATUS_NOTIFICATION /* Upstream commit 93aae17a (v2.6.38) */ #define GET_EVENT_STATUS_NOTIFICATION 0x4a #endif #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26) #define VARIABLE_LENGTH_CMD 0x7f #endif #ifndef READ_16 #define READ_16 0x88 #endif #ifndef WRITE_16 #define WRITE_16 0x8a #endif #ifndef VERIFY_16 #define VERIFY_16 0x8f #endif #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 38) #ifndef MI_REPORT_IDENTIFYING_INFORMATION #define MI_REPORT_IDENTIFYING_INFORMATION 0x05 #endif #ifndef MI_REPORT_SUPPORTED_OPERATION_CODES #define MI_REPORT_SUPPORTED_OPERATION_CODES 0x0c #endif #ifndef MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS #define MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS 0x0d #endif #endif #ifndef SAI_READ_CAPACITY_16 /* values for service action in */ #define SAI_READ_CAPACITY_16 0x10 #endif #endif #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33) #ifndef SAI_GET_LBA_STATUS #define SAI_GET_LBA_STATUS 0x12 #endif #endif #ifndef GENERATING_UPSTREAM_PATCH #ifndef REPORT_LUNS #define REPORT_LUNS 0xa0 #endif #endif #ifndef WRITE_SAME_16 #define WRITE_SAME_16 0x93 #endif #ifndef EXTENDED_COPY #define EXTENDED_COPY 0x83 #endif #ifndef RECEIVE_COPY_RESULTS #define RECEIVE_COPY_RESULTS 0x84 #endif #ifndef SYNCHRONIZE_CACHE_16 #define SYNCHRONIZE_CACHE_16 0x91 #endif #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33) /* * From . See also commit * f57e4502cea471c69782d4790c71d8414ab49a9d. */ #define UNMAP 0x42 #endif /* Subcodes of VARIABLE_LENGTH_CMD (0x7F) */ #define SUBCODE_READ_32 0x09 #define SUBCODE_VERIFY_32 0x0a #define SUBCODE_WRITE_32 0x0b #define SUBCODE_WRITE_VERIFY_32 0x0c #define SUBCODE_WRITE_SAME_32 0x0d #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 12, 0) /* * From . See also commit * 1c68cc1626341665a8bd1d2c7dfffd7fc852a79c. */ #ifndef COMPARE_AND_WRITE #define COMPARE_AND_WRITE 0x89 #endif #endif #if !defined(__KERNEL__) || LINUX_VERSION_CODE < KERNEL_VERSION(3, 19, 0) /* * See also patch "scsi: rename SERVICE_ACTION_IN_16 to SERVICE_ACTION_IN_16" * (commit eb846d9f147455e4e5e1863bfb5e31974bb69b7c; kernel 3.19.0). */ #ifndef SERVICE_ACTION_IN_16 #define SERVICE_ACTION_IN_16 0x9e #endif #endif #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 28) /* * From . See also commit * d30a2605be9d5132d95944916e8f578fcfe4f976. */ #define BLKDISCARD _IO(0x12, 119) #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 /************************************************************* ** TPGS field in byte 5 of the INQUIRY response (SPC-4). *************************************************************/ enum { SCST_INQ_TPGS_MODE_IMPLICIT = 0x10, SCST_INQ_TPGS_MODE_EXPLICIT = 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_TST_0_SINGLE_TASK_SET 0 #define SCST_TST_1_SEP_TASK_SETS 1 /******************************************************************* ** Values for the control mode page QUEUE ALGORITHM MODIFIER field *******************************************************************/ #define SCST_QUEUE_ALG_0_RESTRICTED_REORDER 0 #define SCST_QUEUE_ALG_1_UNRESTRICTED_REORDER 1 /************************************************************* ** Values for the control mode page D_SENSE field *************************************************************/ #define SCST_D_SENSE_0_FIXED_SENSE 0 #define SCST_D_SENSE_1_DESCR_SENSE 1 /************************************************************* ** Values for the control mode page QErr field *************************************************************/ #define SCST_QERR_0_ALL_RESUME 0 #define SCST_QERR_1_ABORT_ALL 1 #define SCST_QERR_2_RESERVED 2 #define SCST_QERR_3_ABORT_THIS_NEXUS_ONLY 3 /************************************************************* ** Values for the control mode page ATO field *************************************************************/ /* I.e., app tags owned by storage */ #define SCST_ATO_0_MODIFIED_BY_STORAGE 0 /* I.e., app tags owned by application */ #define SCST_ATO_1_NOT_MODIFIED_BY_STORAGE 1 /************************************************************* ** Values for the control mode page DPICZ field *************************************************************/ #define SCST_DPICZ_CHECK_ON_xPROT_0 0 #define SCST_DPICZ_NO_CHECK_ON_xPROT_0 1 /************************************************************* ** APP/REF TAG DIF constants *************************************************************/ /* Skip all guards checks for this block */ #define SCST_DIF_NO_CHECK_ALL_APP_TAG cpu_to_be16(0xFFFF) #define SCST_DIF_NO_CHECK_ALL_REF_TAG cpu_to_be32(0xFFFFFFFF) /* Don't check app tag for this block */ #define SCST_DIF_NO_CHECK_APP_TAG 0 /************************************************************* ** Shift of size of DIF tag (8 bytes) *************************************************************/ #define SCST_DIF_TAG_SHIFT 3 /************************************************************* ** Formats of DIF guard tags *************************************************************/ #define SCST_DIF_GUARD_FORMAT_CRC 0 #define SCST_DIF_GUARD_FORMAT_IP 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 /* * SCST extension. Added, because there is no TransportID for Copy Manager * defined anywhere in the SCSI standards. */ #define SCST_TRANSPORTID_PROTOCOLID_COPY_MGR 0xC /** * enum scst_tg_state - SCSI target port group asymmetric access state. * * See also the documentation of the REPORT TARGET PORT GROUPS command in SPC-4. */ enum scst_tg_state { SCST_TG_STATE_UNDEFINED = -1, SCST_TG_STATE_OPTIMIZED = 0x0, SCST_TG_STATE_NONOPTIMIZED = 0x1, SCST_TG_STATE_STANDBY = 0x2, SCST_TG_STATE_UNAVAILABLE = 0x3, SCST_TG_STATE_LBA_DEPENDENT = 0x4, SCST_TG_STATE_OFFLINE = 0xe, SCST_TG_STATE_TRANSITIONING = 0xf, }; /** * Target port group preferred bit. * * See also the documentation of the REPORT TARGET PORT GROUPS command in SPC-4. */ enum { SCST_TG_PREFERRED = 0x80, }; /** * enum scst_tg_sup - Supported SCSI target port group states. * * See also the documentation of the REPORT TARGET PORT GROUPS command in SPC-4. */ enum scst_tg_sup { SCST_TG_SUP_OPTIMIZED = 0x01, SCST_TG_SUP_NONOPTIMIZED = 0x02, SCST_TG_SUP_STANDBY = 0x04, SCST_TG_SUP_UNAVAILABLE = 0x08, SCST_TG_SUP_LBA_DEPENDENT = 0x10, SCST_TG_SUP_OFFLINE = 0x40, SCST_TG_SUP_TRANSITION = 0x80, }; /************************************************************* ** Misc SCSI constants *************************************************************/ #define SCST_SENSE_ASC_UA_RESET 0x29 /************************************************************* ** Compatibility constants *************************************************************/ #ifndef DID_TRANSPORT_DISRUPTED #define DID_TRANSPORT_DISRUPTED 0xe #endif #ifndef DID_TRANSPORT_FAILFAST #define DID_TRANSPORT_FAILFAST 0xf #endif /* See also patch "Add detailed SCSI I/O errors" (commit ID 63583cca745f) */ #ifndef DID_TARGET_FAILURE #define DID_TARGET_FAILURE 0x10 #endif #ifndef DID_NEXUS_FAILURE #define DID_NEXUS_FAILURE 0x11 #endif #ifndef DID_ALLOC_FAILURE #define DID_ALLOC_FAILURE 0x12 #endif #ifndef DID_MEDIUM_ERROR #define DID_MEDIUM_ERROR 0x13 #endif /************************************************************* ** Various timeouts *************************************************************/ #define SCST_DEFAULT_TIMEOUT (30 * HZ) #define SCST_DEFAULT_NOMINAL_TIMEOUT_SEC 1 #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 (10 * 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_VAR_DIR "/var/lib/scst" #define SCST_PR_DIR (SCST_VAR_DIR "/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 /* * Error code returned by target attribute sysfs methods if invoked after * scst_register_target() finished but before before scst_tgt_set_tgt_priv() * has been invoked. */ enum { E_TGT_PRIV_NOT_YET_SET = EBUSY }; /* Size of the lock value block in the DLM PR lockspace */ #define PR_DLM_LVB_LEN 256 #endif /* __SCST_CONST_H */