1014 lines
28 KiB
C
1014 lines
28 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef TARGET_CORE_BASE_H
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#define TARGET_CORE_BASE_H
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#include <linux/configfs.h> /* struct config_group */
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#include <linux/dma-direction.h> /* enum dma_data_direction */
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#include <linux/sbitmap.h>
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#include <linux/percpu-refcount.h>
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#include <linux/semaphore.h> /* struct semaphore */
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#include <linux/completion.h>
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#define TARGET_CORE_VERSION "v5.0"
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/*
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* Maximum size of a CDB that can be stored in se_cmd without allocating
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* memory dynamically for the CDB.
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*/
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#define TCM_MAX_COMMAND_SIZE 32
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/*
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* From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
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* defined 96, but the real limit is 252 (or 260 including the header)
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*/
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#define TRANSPORT_SENSE_BUFFER 96
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/* Used by transport_send_check_condition_and_sense() */
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#define SPC_SENSE_KEY_OFFSET 2
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#define SPC_ADD_SENSE_LEN_OFFSET 7
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#define SPC_DESC_TYPE_OFFSET 8
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#define SPC_ADDITIONAL_DESC_LEN_OFFSET 9
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#define SPC_VALIDITY_OFFSET 10
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#define SPC_ASC_KEY_OFFSET 12
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#define SPC_ASCQ_KEY_OFFSET 13
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#define TRANSPORT_IQN_LEN 224
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/* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
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#define LU_GROUP_NAME_BUF 256
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/* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
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#define TG_PT_GROUP_NAME_BUF 256
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/* Used to parse VPD into struct t10_vpd */
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#define VPD_TMP_BUF_SIZE 254
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/* Used by transport_generic_cmd_sequencer() */
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#define READ_BLOCK_LEN 6
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#define READ_CAP_LEN 8
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#define READ_POSITION_LEN 20
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#define INQUIRY_LEN 36
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/* Used by transport_get_inquiry_vpd_serial() */
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#define INQUIRY_VPD_SERIAL_LEN 254
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/* Used by transport_get_inquiry_vpd_device_ident() */
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#define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254
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#define INQUIRY_VENDOR_LEN 8
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#define INQUIRY_MODEL_LEN 16
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#define INQUIRY_REVISION_LEN 4
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/* Attempts before moving from SHORT to LONG */
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#define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3
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#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT 3 /* In milliseconds */
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#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG 10 /* In milliseconds */
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#define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */
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/* struct se_dev_attrib sanity values */
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/* Default max_unmap_lba_count */
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#define DA_MAX_UNMAP_LBA_COUNT 0
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/* Default max_unmap_block_desc_count */
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#define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0
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/* Default unmap_granularity */
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#define DA_UNMAP_GRANULARITY_DEFAULT 0
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/* Default unmap_granularity_alignment */
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#define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0
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/* Default unmap_zeroes_data */
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#define DA_UNMAP_ZEROES_DATA_DEFAULT 0
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/* Default max_write_same_len, disabled by default */
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#define DA_MAX_WRITE_SAME_LEN 0
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/* Use a model alias based on the configfs backend device name */
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#define DA_EMULATE_MODEL_ALIAS 0
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/* Emulation for WriteCache and SYNCHRONIZE_CACHE */
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#define DA_EMULATE_WRITE_CACHE 0
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/* Emulation for TASK_ABORTED status (TAS) by default */
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#define DA_EMULATE_TAS 1
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/* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
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#define DA_EMULATE_TPU 0
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/*
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* Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
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* block/blk-lib.c:blkdev_issue_discard()
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*/
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#define DA_EMULATE_TPWS 0
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/* Emulation for CompareAndWrite (AtomicTestandSet) by default */
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#define DA_EMULATE_CAW 1
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/* Emulation for 3rd Party Copy (ExtendedCopy) by default */
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#define DA_EMULATE_3PC 1
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/* No Emulation for PSCSI by default */
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#define DA_EMULATE_ALUA 0
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/* Emulate SCSI2 RESERVE/RELEASE and Persistent Reservations by default */
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#define DA_EMULATE_PR 1
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/* Emulation for REPORT SUPPORTED OPERATION CODES */
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#define DA_EMULATE_RSOC 1
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/* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
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#define DA_ENFORCE_PR_ISIDS 1
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/* Force SPC-3 PR Activate Persistence across Target Power Loss */
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#define DA_FORCE_PR_APTPL 0
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#define DA_STATUS_MAX_SECTORS_MIN 16
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#define DA_STATUS_MAX_SECTORS_MAX 8192
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/* By default don't report non-rotating (solid state) medium */
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#define DA_IS_NONROT 0
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/* Queue Algorithm Modifier default for restricted reordering in control mode page */
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#define DA_EMULATE_REST_REORD 0
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#define SE_INQUIRY_BUF 1024
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#define SE_MODE_PAGE_BUF 512
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#define SE_SENSE_BUF 96
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/* struct se_hba->hba_flags */
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enum hba_flags_table {
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HBA_FLAGS_INTERNAL_USE = 0x01,
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HBA_FLAGS_PSCSI_MODE = 0x02,
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};
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/* Special transport agnostic struct se_cmd->t_states */
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enum transport_state_table {
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TRANSPORT_NO_STATE = 0,
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TRANSPORT_NEW_CMD = 1,
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TRANSPORT_WRITE_PENDING = 3,
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TRANSPORT_PROCESSING = 5,
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TRANSPORT_COMPLETE = 6,
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TRANSPORT_ISTATE_PROCESSING = 11,
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TRANSPORT_COMPLETE_QF_WP = 18,
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TRANSPORT_COMPLETE_QF_OK = 19,
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TRANSPORT_COMPLETE_QF_ERR = 20,
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};
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/* Used for struct se_cmd->se_cmd_flags */
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enum se_cmd_flags_table {
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SCF_SUPPORTED_SAM_OPCODE = (1 << 0),
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SCF_TRANSPORT_TASK_SENSE = (1 << 1),
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SCF_EMULATED_TASK_SENSE = (1 << 2),
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SCF_SCSI_DATA_CDB = (1 << 3),
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SCF_SCSI_TMR_CDB = (1 << 4),
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SCF_FUA = (1 << 5),
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SCF_SE_LUN_CMD = (1 << 6),
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SCF_BIDI = (1 << 7),
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SCF_SENT_CHECK_CONDITION = (1 << 8),
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SCF_OVERFLOW_BIT = (1 << 9),
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SCF_UNDERFLOW_BIT = (1 << 10),
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SCF_ALUA_NON_OPTIMIZED = (1 << 11),
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SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = (1 << 12),
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SCF_COMPARE_AND_WRITE = (1 << 13),
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SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = (1 << 14),
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SCF_ACK_KREF = (1 << 15),
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SCF_USE_CPUID = (1 << 16),
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SCF_TASK_ATTR_SET = (1 << 17),
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SCF_TREAT_READ_AS_NORMAL = (1 << 18),
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};
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/*
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* Used by transport_send_check_condition_and_sense()
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* to signal which ASC/ASCQ sense payload should be built.
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*/
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typedef unsigned __bitwise sense_reason_t;
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enum tcm_sense_reason_table {
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#define R(x) (__force sense_reason_t )(x)
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TCM_NO_SENSE = R(0x00),
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TCM_NON_EXISTENT_LUN = R(0x01),
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TCM_UNSUPPORTED_SCSI_OPCODE = R(0x02),
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TCM_INCORRECT_AMOUNT_OF_DATA = R(0x03),
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TCM_UNEXPECTED_UNSOLICITED_DATA = R(0x04),
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TCM_SERVICE_CRC_ERROR = R(0x05),
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TCM_SNACK_REJECTED = R(0x06),
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TCM_SECTOR_COUNT_TOO_MANY = R(0x07),
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TCM_INVALID_CDB_FIELD = R(0x08),
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TCM_INVALID_PARAMETER_LIST = R(0x09),
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TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = R(0x0a),
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TCM_UNKNOWN_MODE_PAGE = R(0x0b),
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TCM_WRITE_PROTECTED = R(0x0c),
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TCM_CHECK_CONDITION_ABORT_CMD = R(0x0d),
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TCM_CHECK_CONDITION_UNIT_ATTENTION = R(0x0e),
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TCM_RESERVATION_CONFLICT = R(0x10),
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TCM_ADDRESS_OUT_OF_RANGE = R(0x11),
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TCM_OUT_OF_RESOURCES = R(0x12),
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TCM_PARAMETER_LIST_LENGTH_ERROR = R(0x13),
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TCM_MISCOMPARE_VERIFY = R(0x14),
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TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED = R(0x15),
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TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED = R(0x16),
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TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED = R(0x17),
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TCM_COPY_TARGET_DEVICE_NOT_REACHABLE = R(0x18),
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TCM_TOO_MANY_TARGET_DESCS = R(0x19),
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TCM_UNSUPPORTED_TARGET_DESC_TYPE_CODE = R(0x1a),
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TCM_TOO_MANY_SEGMENT_DESCS = R(0x1b),
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TCM_UNSUPPORTED_SEGMENT_DESC_TYPE_CODE = R(0x1c),
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TCM_INSUFFICIENT_REGISTRATION_RESOURCES = R(0x1d),
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TCM_LUN_BUSY = R(0x1e),
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TCM_INVALID_FIELD_IN_COMMAND_IU = R(0x1f),
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TCM_ALUA_TG_PT_STANDBY = R(0x20),
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TCM_ALUA_TG_PT_UNAVAILABLE = R(0x21),
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TCM_ALUA_STATE_TRANSITION = R(0x22),
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TCM_ALUA_OFFLINE = R(0x23),
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#undef R
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};
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enum target_sc_flags_table {
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TARGET_SCF_BIDI_OP = 0x01,
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TARGET_SCF_ACK_KREF = 0x02,
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TARGET_SCF_UNKNOWN_SIZE = 0x04,
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TARGET_SCF_USE_CPUID = 0x08,
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};
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/* fabric independent task management function values */
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enum tcm_tmreq_table {
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TMR_ABORT_TASK = 1,
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TMR_ABORT_TASK_SET = 2,
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TMR_CLEAR_ACA = 3,
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TMR_CLEAR_TASK_SET = 4,
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TMR_LUN_RESET = 5,
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TMR_TARGET_WARM_RESET = 6,
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TMR_TARGET_COLD_RESET = 7,
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TMR_LUN_RESET_PRO = 0x80,
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TMR_UNKNOWN = 0xff,
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};
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/* fabric independent task management response values */
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enum tcm_tmrsp_table {
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TMR_FUNCTION_FAILED = 0,
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TMR_FUNCTION_COMPLETE = 1,
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TMR_TASK_DOES_NOT_EXIST = 2,
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TMR_LUN_DOES_NOT_EXIST = 3,
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TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 4,
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TMR_FUNCTION_REJECTED = 5,
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};
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/*
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* Used for target SCSI statistics
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*/
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typedef enum {
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SCSI_INST_INDEX,
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SCSI_AUTH_INTR_INDEX,
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SCSI_INDEX_TYPE_MAX
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} scsi_index_t;
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struct se_cmd;
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struct t10_alua_lba_map_member {
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struct list_head lba_map_mem_list;
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int lba_map_mem_alua_state;
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int lba_map_mem_alua_pg_id;
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};
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struct t10_alua_lba_map {
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u64 lba_map_first_lba;
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u64 lba_map_last_lba;
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struct list_head lba_map_list;
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struct list_head lba_map_mem_list;
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};
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struct t10_alua {
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/* ALUA Target Port Group ID */
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u16 alua_tg_pt_gps_counter;
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u32 alua_tg_pt_gps_count;
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/* Referrals support */
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spinlock_t lba_map_lock;
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u32 lba_map_segment_size;
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u32 lba_map_segment_multiplier;
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struct list_head lba_map_list;
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spinlock_t tg_pt_gps_lock;
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struct se_device *t10_dev;
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/* Used for default ALUA Target Port Group */
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struct t10_alua_tg_pt_gp *default_tg_pt_gp;
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/* Used for default ALUA Target Port Group ConfigFS group */
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struct config_group alua_tg_pt_gps_group;
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struct list_head tg_pt_gps_list;
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};
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struct t10_alua_lu_gp {
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u16 lu_gp_id;
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int lu_gp_valid_id;
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u32 lu_gp_members;
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atomic_t lu_gp_ref_cnt;
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spinlock_t lu_gp_lock;
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struct config_group lu_gp_group;
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struct list_head lu_gp_node;
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struct list_head lu_gp_mem_list;
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};
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struct t10_alua_lu_gp_member {
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bool lu_gp_assoc;
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atomic_t lu_gp_mem_ref_cnt;
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spinlock_t lu_gp_mem_lock;
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struct t10_alua_lu_gp *lu_gp;
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struct se_device *lu_gp_mem_dev;
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struct list_head lu_gp_mem_list;
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};
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struct t10_alua_tg_pt_gp {
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u16 tg_pt_gp_id;
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int tg_pt_gp_valid_id;
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int tg_pt_gp_alua_supported_states;
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int tg_pt_gp_alua_access_status;
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int tg_pt_gp_alua_access_type;
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int tg_pt_gp_nonop_delay_msecs;
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int tg_pt_gp_trans_delay_msecs;
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int tg_pt_gp_implicit_trans_secs;
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int tg_pt_gp_pref;
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int tg_pt_gp_write_metadata;
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u32 tg_pt_gp_members;
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int tg_pt_gp_alua_access_state;
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atomic_t tg_pt_gp_ref_cnt;
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spinlock_t tg_pt_gp_lock;
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struct mutex tg_pt_gp_transition_mutex;
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struct se_device *tg_pt_gp_dev;
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struct config_group tg_pt_gp_group;
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struct list_head tg_pt_gp_list;
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struct list_head tg_pt_gp_lun_list;
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struct se_lun *tg_pt_gp_alua_lun;
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struct se_node_acl *tg_pt_gp_alua_nacl;
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};
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struct t10_vpd {
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unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
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int protocol_identifier_set;
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u32 protocol_identifier;
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u32 device_identifier_code_set;
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u32 association;
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u32 device_identifier_type;
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struct list_head vpd_list;
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};
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struct t10_wwn {
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/*
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* SCSI left aligned strings may not be null terminated. +1 to ensure a
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* null terminator is always present.
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*/
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char vendor[INQUIRY_VENDOR_LEN + 1];
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char model[INQUIRY_MODEL_LEN + 1];
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char revision[INQUIRY_REVISION_LEN + 1];
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char unit_serial[INQUIRY_VPD_SERIAL_LEN];
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u32 company_id;
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spinlock_t t10_vpd_lock;
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struct se_device *t10_dev;
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struct config_group t10_wwn_group;
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struct list_head t10_vpd_list;
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};
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struct t10_pr_registration {
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/* Used for fabrics that contain WWN+ISID */
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#define PR_REG_ISID_LEN 16
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/* PR_REG_ISID_LEN + ',i,0x' */
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#define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
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char pr_reg_isid[PR_REG_ISID_LEN];
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/* Used during APTPL metadata reading */
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#define PR_APTPL_MAX_IPORT_LEN 256
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unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
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/* Used during APTPL metadata reading */
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#define PR_APTPL_MAX_TPORT_LEN 256
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unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
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u16 pr_aptpl_rpti;
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u16 pr_reg_tpgt;
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/* Reservation effects all target ports */
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int pr_reg_all_tg_pt;
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/* Activate Persistence across Target Power Loss */
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int pr_reg_aptpl;
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int pr_res_holder;
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int pr_res_type;
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int pr_res_scope;
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/* Used for fabric initiator WWPNs using a ISID */
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bool isid_present_at_reg;
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u64 pr_res_mapped_lun;
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u64 pr_aptpl_target_lun;
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u16 tg_pt_sep_rtpi;
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u32 pr_res_generation;
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u64 pr_reg_bin_isid;
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u64 pr_res_key;
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atomic_t pr_res_holders;
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struct se_node_acl *pr_reg_nacl;
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/* Used by ALL_TG_PT=1 registration with deve->pr_ref taken */
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struct se_dev_entry *pr_reg_deve;
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struct list_head pr_reg_list;
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struct list_head pr_reg_abort_list;
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struct list_head pr_reg_aptpl_list;
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struct list_head pr_reg_atp_list;
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struct list_head pr_reg_atp_mem_list;
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};
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struct t10_reservation {
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/* Reservation effects all target ports */
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int pr_all_tg_pt;
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/* Activate Persistence across Target Power Loss enabled
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* for SCSI device */
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int pr_aptpl_active;
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#define PR_APTPL_BUF_LEN 262144
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u32 pr_generation;
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spinlock_t registration_lock;
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spinlock_t aptpl_reg_lock;
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/*
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* This will always be set by one individual I_T Nexus.
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* However with all_tg_pt=1, other I_T Nexus from the
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* same initiator can access PR reg/res info on a different
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* target port.
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*
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* There is also the 'All Registrants' case, where there is
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* a single *pr_res_holder of the reservation, but all
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* registrations are considered reservation holders.
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*/
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struct se_node_acl *pr_res_holder;
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struct list_head registration_list;
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struct list_head aptpl_reg_list;
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};
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struct se_tmr_req {
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/* Task Management function to be performed */
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u8 function;
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/* Task Management response to send */
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u8 response;
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int call_transport;
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/* Reference to ITT that Task Mgmt should be performed */
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u64 ref_task_tag;
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void *fabric_tmr_ptr;
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struct se_cmd *task_cmd;
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struct se_device *tmr_dev;
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struct list_head tmr_list;
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};
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enum target_prot_op {
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TARGET_PROT_NORMAL = 0,
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TARGET_PROT_DIN_INSERT = (1 << 0),
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TARGET_PROT_DOUT_INSERT = (1 << 1),
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TARGET_PROT_DIN_STRIP = (1 << 2),
|
|
TARGET_PROT_DOUT_STRIP = (1 << 3),
|
|
TARGET_PROT_DIN_PASS = (1 << 4),
|
|
TARGET_PROT_DOUT_PASS = (1 << 5),
|
|
};
|
|
|
|
#define TARGET_PROT_ALL TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \
|
|
TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \
|
|
TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS
|
|
|
|
enum target_prot_type {
|
|
TARGET_DIF_TYPE0_PROT,
|
|
TARGET_DIF_TYPE1_PROT,
|
|
TARGET_DIF_TYPE2_PROT,
|
|
TARGET_DIF_TYPE3_PROT,
|
|
};
|
|
|
|
/* Emulation for UNIT ATTENTION Interlock Control */
|
|
enum target_ua_intlck_ctrl {
|
|
TARGET_UA_INTLCK_CTRL_CLEAR = 0,
|
|
TARGET_UA_INTLCK_CTRL_NO_CLEAR = 1,
|
|
TARGET_UA_INTLCK_CTRL_ESTABLISH_UA = 2,
|
|
};
|
|
|
|
enum target_core_dif_check {
|
|
TARGET_DIF_CHECK_GUARD = 0x1 << 0,
|
|
TARGET_DIF_CHECK_APPTAG = 0x1 << 1,
|
|
TARGET_DIF_CHECK_REFTAG = 0x1 << 2,
|
|
};
|
|
|
|
/* for sam_task_attr */
|
|
#define TCM_SIMPLE_TAG 0x20
|
|
#define TCM_HEAD_TAG 0x21
|
|
#define TCM_ORDERED_TAG 0x22
|
|
#define TCM_ACA_TAG 0x24
|
|
|
|
struct se_cmd {
|
|
/* Used for fail with specific sense codes */
|
|
sense_reason_t sense_reason;
|
|
/* SAM response code being sent to initiator */
|
|
u8 scsi_status;
|
|
u16 scsi_sense_length;
|
|
unsigned unknown_data_length:1;
|
|
bool state_active:1;
|
|
u64 tag; /* SAM command identifier aka task tag */
|
|
/* Delay for ALUA Active/NonOptimized state access in milliseconds */
|
|
int alua_nonop_delay;
|
|
/* See include/linux/dma-mapping.h */
|
|
enum dma_data_direction data_direction;
|
|
/* For SAM Task Attribute */
|
|
int sam_task_attr;
|
|
/* Used for se_sess->sess_tag_pool */
|
|
unsigned int map_tag;
|
|
int map_cpu;
|
|
/* Transport protocol dependent state, see transport_state_table */
|
|
enum transport_state_table t_state;
|
|
/* See se_cmd_flags_table */
|
|
u32 se_cmd_flags;
|
|
/* Total size in bytes associated with command */
|
|
u32 data_length;
|
|
u32 residual_count;
|
|
u64 orig_fe_lun;
|
|
/* Persistent Reservation key */
|
|
u64 pr_res_key;
|
|
/* Used for sense data */
|
|
void *sense_buffer;
|
|
struct list_head se_delayed_node;
|
|
struct list_head se_qf_node;
|
|
struct se_device *se_dev;
|
|
struct se_lun *se_lun;
|
|
/* Only used for internal passthrough and legacy TCM fabric modules */
|
|
struct se_session *se_sess;
|
|
struct target_cmd_counter *cmd_cnt;
|
|
struct se_tmr_req *se_tmr_req;
|
|
struct llist_node se_cmd_list;
|
|
struct completion *free_compl;
|
|
struct completion *abrt_compl;
|
|
const struct target_core_fabric_ops *se_tfo;
|
|
sense_reason_t (*execute_cmd)(struct se_cmd *);
|
|
sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool, int *);
|
|
void *protocol_data;
|
|
|
|
unsigned char *t_task_cdb;
|
|
unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
|
|
unsigned long long t_task_lba;
|
|
unsigned int t_task_nolb;
|
|
unsigned int transport_state;
|
|
#define CMD_T_ABORTED (1 << 0)
|
|
#define CMD_T_ACTIVE (1 << 1)
|
|
#define CMD_T_COMPLETE (1 << 2)
|
|
#define CMD_T_SENT (1 << 4)
|
|
#define CMD_T_STOP (1 << 5)
|
|
#define CMD_T_TAS (1 << 10)
|
|
#define CMD_T_FABRIC_STOP (1 << 11)
|
|
spinlock_t t_state_lock;
|
|
struct kref cmd_kref;
|
|
struct completion t_transport_stop_comp;
|
|
|
|
struct work_struct work;
|
|
|
|
struct scatterlist *t_data_sg;
|
|
struct scatterlist *t_data_sg_orig;
|
|
unsigned int t_data_nents;
|
|
unsigned int t_data_nents_orig;
|
|
void *t_data_vmap;
|
|
struct scatterlist *t_bidi_data_sg;
|
|
unsigned int t_bidi_data_nents;
|
|
|
|
/* Used for lun->lun_ref counting */
|
|
int lun_ref_active;
|
|
|
|
struct list_head state_list;
|
|
|
|
/* backend private data */
|
|
void *priv;
|
|
|
|
/* DIF related members */
|
|
enum target_prot_op prot_op;
|
|
enum target_prot_type prot_type;
|
|
u8 prot_checks;
|
|
bool prot_pto;
|
|
u32 prot_length;
|
|
u32 reftag_seed;
|
|
struct scatterlist *t_prot_sg;
|
|
unsigned int t_prot_nents;
|
|
sense_reason_t pi_err;
|
|
u64 sense_info;
|
|
/*
|
|
* CPU LIO will execute the cmd on. Defaults to the CPU the cmd is
|
|
* initialized on. Drivers can override.
|
|
*/
|
|
int cpuid;
|
|
};
|
|
|
|
struct se_ua {
|
|
u8 ua_asc;
|
|
u8 ua_ascq;
|
|
struct list_head ua_nacl_list;
|
|
};
|
|
|
|
struct se_node_acl {
|
|
char initiatorname[TRANSPORT_IQN_LEN];
|
|
/* Used to signal demo mode created ACL, disabled by default */
|
|
bool dynamic_node_acl;
|
|
bool dynamic_stop;
|
|
u32 queue_depth;
|
|
u32 acl_index;
|
|
enum target_prot_type saved_prot_type;
|
|
#define MAX_ACL_TAG_SIZE 64
|
|
char acl_tag[MAX_ACL_TAG_SIZE];
|
|
/* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
|
|
atomic_t acl_pr_ref_count;
|
|
struct hlist_head lun_entry_hlist;
|
|
struct se_session *nacl_sess;
|
|
struct se_portal_group *se_tpg;
|
|
struct mutex lun_entry_mutex;
|
|
spinlock_t nacl_sess_lock;
|
|
struct config_group acl_group;
|
|
struct config_group acl_attrib_group;
|
|
struct config_group acl_auth_group;
|
|
struct config_group acl_param_group;
|
|
struct config_group acl_fabric_stat_group;
|
|
struct list_head acl_list;
|
|
struct list_head acl_sess_list;
|
|
struct completion acl_free_comp;
|
|
struct kref acl_kref;
|
|
};
|
|
|
|
static inline struct se_node_acl *acl_to_nacl(struct config_item *item)
|
|
{
|
|
return container_of(to_config_group(item), struct se_node_acl,
|
|
acl_group);
|
|
}
|
|
|
|
static inline struct se_node_acl *attrib_to_nacl(struct config_item *item)
|
|
{
|
|
return container_of(to_config_group(item), struct se_node_acl,
|
|
acl_attrib_group);
|
|
}
|
|
|
|
static inline struct se_node_acl *auth_to_nacl(struct config_item *item)
|
|
{
|
|
return container_of(to_config_group(item), struct se_node_acl,
|
|
acl_auth_group);
|
|
}
|
|
|
|
static inline struct se_node_acl *param_to_nacl(struct config_item *item)
|
|
{
|
|
return container_of(to_config_group(item), struct se_node_acl,
|
|
acl_param_group);
|
|
}
|
|
|
|
static inline struct se_node_acl *fabric_stat_to_nacl(struct config_item *item)
|
|
{
|
|
return container_of(to_config_group(item), struct se_node_acl,
|
|
acl_fabric_stat_group);
|
|
}
|
|
|
|
struct target_cmd_counter {
|
|
struct percpu_ref refcnt;
|
|
wait_queue_head_t refcnt_wq;
|
|
struct completion stop_done;
|
|
atomic_t stopped;
|
|
};
|
|
|
|
struct se_session {
|
|
u64 sess_bin_isid;
|
|
enum target_prot_op sup_prot_ops;
|
|
enum target_prot_type sess_prot_type;
|
|
struct se_node_acl *se_node_acl;
|
|
struct se_portal_group *se_tpg;
|
|
void *fabric_sess_ptr;
|
|
struct list_head sess_list;
|
|
struct list_head sess_acl_list;
|
|
spinlock_t sess_cmd_lock;
|
|
void *sess_cmd_map;
|
|
struct sbitmap_queue sess_tag_pool;
|
|
struct target_cmd_counter *cmd_cnt;
|
|
};
|
|
|
|
struct se_device;
|
|
struct se_transform_info;
|
|
struct scatterlist;
|
|
|
|
struct se_ml_stat_grps {
|
|
struct config_group stat_group;
|
|
struct config_group scsi_auth_intr_group;
|
|
struct config_group scsi_att_intr_port_group;
|
|
};
|
|
|
|
struct se_lun_acl {
|
|
u64 mapped_lun;
|
|
struct se_node_acl *se_lun_nacl;
|
|
struct se_lun *se_lun;
|
|
struct config_group se_lun_group;
|
|
struct se_ml_stat_grps ml_stat_grps;
|
|
};
|
|
|
|
struct se_dev_entry {
|
|
u64 mapped_lun;
|
|
u64 pr_res_key;
|
|
u64 creation_time;
|
|
bool lun_access_ro;
|
|
u32 attach_count;
|
|
atomic_long_t total_cmds;
|
|
atomic_long_t read_bytes;
|
|
atomic_long_t write_bytes;
|
|
/* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
|
|
struct kref pr_kref;
|
|
struct completion pr_comp;
|
|
struct se_lun_acl *se_lun_acl;
|
|
spinlock_t ua_lock;
|
|
struct se_lun *se_lun;
|
|
#define DEF_PR_REG_ACTIVE 1
|
|
unsigned long deve_flags;
|
|
struct list_head alua_port_list;
|
|
struct list_head lun_link;
|
|
struct list_head ua_list;
|
|
struct hlist_node link;
|
|
struct rcu_head rcu_head;
|
|
};
|
|
|
|
struct se_dev_attrib {
|
|
bool emulate_model_alias;
|
|
bool emulate_dpo; /* deprecated */
|
|
bool emulate_fua_write;
|
|
bool emulate_fua_read; /* deprecated */
|
|
bool emulate_write_cache;
|
|
enum target_ua_intlck_ctrl emulate_ua_intlck_ctrl;
|
|
bool emulate_tas;
|
|
bool emulate_tpu;
|
|
bool emulate_tpws;
|
|
bool emulate_caw;
|
|
bool emulate_3pc;
|
|
bool emulate_pr;
|
|
bool emulate_rsoc;
|
|
enum target_prot_type pi_prot_type;
|
|
enum target_prot_type hw_pi_prot_type;
|
|
bool pi_prot_verify;
|
|
bool enforce_pr_isids;
|
|
bool force_pr_aptpl;
|
|
bool is_nonrot;
|
|
bool emulate_rest_reord;
|
|
bool unmap_zeroes_data;
|
|
u32 hw_block_size;
|
|
u32 block_size;
|
|
u32 hw_max_sectors;
|
|
u32 optimal_sectors;
|
|
u32 hw_queue_depth;
|
|
u32 queue_depth;
|
|
u32 max_unmap_lba_count;
|
|
u32 max_unmap_block_desc_count;
|
|
u32 unmap_granularity;
|
|
u32 unmap_granularity_alignment;
|
|
u32 max_write_same_len;
|
|
struct se_device *da_dev;
|
|
struct config_group da_group;
|
|
};
|
|
|
|
struct se_port_stat_grps {
|
|
struct config_group stat_group;
|
|
struct config_group scsi_port_group;
|
|
struct config_group scsi_tgt_port_group;
|
|
struct config_group scsi_transport_group;
|
|
};
|
|
|
|
struct scsi_port_stats {
|
|
atomic_long_t cmd_pdus;
|
|
atomic_long_t tx_data_octets;
|
|
atomic_long_t rx_data_octets;
|
|
};
|
|
|
|
struct se_lun {
|
|
u64 unpacked_lun;
|
|
bool lun_shutdown;
|
|
bool lun_access_ro;
|
|
u32 lun_index;
|
|
|
|
/* RELATIVE TARGET PORT IDENTIFER */
|
|
u16 lun_rtpi;
|
|
atomic_t lun_acl_count;
|
|
struct se_device __rcu *lun_se_dev;
|
|
|
|
struct list_head lun_deve_list;
|
|
spinlock_t lun_deve_lock;
|
|
|
|
/* ALUA state */
|
|
int lun_tg_pt_secondary_stat;
|
|
int lun_tg_pt_secondary_write_md;
|
|
atomic_t lun_tg_pt_secondary_offline;
|
|
struct mutex lun_tg_pt_md_mutex;
|
|
|
|
/* ALUA target port group linkage */
|
|
struct list_head lun_tg_pt_gp_link;
|
|
struct t10_alua_tg_pt_gp __rcu *lun_tg_pt_gp;
|
|
spinlock_t lun_tg_pt_gp_lock;
|
|
|
|
struct se_portal_group *lun_tpg;
|
|
struct scsi_port_stats lun_stats;
|
|
struct config_group lun_group;
|
|
struct se_port_stat_grps port_stat_grps;
|
|
struct completion lun_shutdown_comp;
|
|
struct percpu_ref lun_ref;
|
|
struct list_head lun_dev_link;
|
|
struct hlist_node link;
|
|
struct rcu_head rcu_head;
|
|
};
|
|
|
|
struct se_dev_stat_grps {
|
|
struct config_group stat_group;
|
|
struct config_group scsi_dev_group;
|
|
struct config_group scsi_tgt_dev_group;
|
|
struct config_group scsi_lu_group;
|
|
};
|
|
|
|
struct se_cmd_queue {
|
|
struct llist_head cmd_list;
|
|
struct work_struct work;
|
|
};
|
|
|
|
struct se_dev_plug {
|
|
struct se_device *se_dev;
|
|
};
|
|
|
|
struct se_device_queue {
|
|
struct list_head state_list;
|
|
spinlock_t lock;
|
|
struct se_cmd_queue sq;
|
|
};
|
|
|
|
struct se_device {
|
|
/* RELATIVE TARGET PORT IDENTIFER Counter */
|
|
u16 dev_rpti_counter;
|
|
/* Used for SAM Task Attribute ordering */
|
|
u32 dev_cur_ordered_id;
|
|
u32 dev_flags;
|
|
#define DF_CONFIGURED 0x00000001
|
|
#define DF_FIRMWARE_VPD_UNIT_SERIAL 0x00000002
|
|
#define DF_EMULATED_VPD_UNIT_SERIAL 0x00000004
|
|
#define DF_USING_UDEV_PATH 0x00000008
|
|
#define DF_USING_ALIAS 0x00000010
|
|
#define DF_READ_ONLY 0x00000020
|
|
u8 transport_flags;
|
|
/* Physical device queue depth */
|
|
u32 queue_depth;
|
|
/* Used for SPC-2 reservations enforce of ISIDs */
|
|
u64 dev_res_bin_isid;
|
|
/* Pointer to transport specific device structure */
|
|
u32 dev_index;
|
|
u64 creation_time;
|
|
atomic_long_t num_resets;
|
|
atomic_long_t aborts_complete;
|
|
atomic_long_t aborts_no_task;
|
|
atomic_long_t num_cmds;
|
|
atomic_long_t read_bytes;
|
|
atomic_long_t write_bytes;
|
|
/* Active commands on this virtual SE device */
|
|
atomic_t non_ordered;
|
|
bool ordered_sync_in_progress;
|
|
atomic_t delayed_cmd_count;
|
|
atomic_t dev_qf_count;
|
|
u32 export_count;
|
|
spinlock_t delayed_cmd_lock;
|
|
spinlock_t dev_reservation_lock;
|
|
unsigned int dev_reservation_flags;
|
|
#define DRF_SPC2_RESERVATIONS 0x00000001
|
|
#define DRF_SPC2_RESERVATIONS_WITH_ISID 0x00000002
|
|
spinlock_t se_port_lock;
|
|
spinlock_t se_tmr_lock;
|
|
spinlock_t qf_cmd_lock;
|
|
struct semaphore caw_sem;
|
|
/* Used for legacy SPC-2 reservations */
|
|
struct se_session *reservation_holder;
|
|
/* Used for ALUA Logical Unit Group membership */
|
|
struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
|
|
/* Used for SPC-3 Persistent Reservations */
|
|
struct t10_pr_registration *dev_pr_res_holder;
|
|
struct list_head dev_sep_list;
|
|
struct list_head dev_tmr_list;
|
|
struct work_struct qf_work_queue;
|
|
struct work_struct delayed_cmd_work;
|
|
struct list_head delayed_cmd_list;
|
|
struct list_head qf_cmd_list;
|
|
/* Pointer to associated SE HBA */
|
|
struct se_hba *se_hba;
|
|
/* T10 Inquiry and VPD WWN Information */
|
|
struct t10_wwn t10_wwn;
|
|
/* T10 Asymmetric Logical Unit Assignment for Target Ports */
|
|
struct t10_alua t10_alua;
|
|
/* T10 SPC-2 + SPC-3 Reservations */
|
|
struct t10_reservation t10_pr;
|
|
struct se_dev_attrib dev_attrib;
|
|
struct config_group dev_action_group;
|
|
struct config_group dev_group;
|
|
struct config_group dev_pr_group;
|
|
struct se_dev_stat_grps dev_stat_grps;
|
|
#define SE_DEV_ALIAS_LEN 512 /* must be less than PAGE_SIZE */
|
|
unsigned char dev_alias[SE_DEV_ALIAS_LEN];
|
|
#define SE_UDEV_PATH_LEN 512 /* must be less than PAGE_SIZE */
|
|
unsigned char udev_path[SE_UDEV_PATH_LEN];
|
|
/* Pointer to template of function pointers for transport */
|
|
const struct target_backend_ops *transport;
|
|
struct se_lun xcopy_lun;
|
|
/* Protection Information */
|
|
int prot_length;
|
|
/* For se_lun->lun_se_dev RCU read-side critical access */
|
|
u32 hba_index;
|
|
struct rcu_head rcu_head;
|
|
int queue_cnt;
|
|
struct se_device_queue *queues;
|
|
struct mutex lun_reset_mutex;
|
|
};
|
|
|
|
struct target_opcode_descriptor {
|
|
u8 support:3;
|
|
u8 serv_action_valid:1;
|
|
u8 opcode;
|
|
u16 service_action;
|
|
u32 cdb_size;
|
|
u8 specific_timeout;
|
|
u16 nominal_timeout;
|
|
u16 recommended_timeout;
|
|
bool (*enabled)(struct se_cmd *cmd);
|
|
void (*update_usage_bits)(u8 *usage_bits,
|
|
struct se_device *dev);
|
|
u8 usage_bits[];
|
|
};
|
|
|
|
struct se_hba {
|
|
u16 hba_tpgt;
|
|
u32 hba_id;
|
|
/* See hba_flags_table */
|
|
u32 hba_flags;
|
|
/* Virtual iSCSI devices attached. */
|
|
u32 dev_count;
|
|
u32 hba_index;
|
|
/* Pointer to transport specific host structure. */
|
|
void *hba_ptr;
|
|
struct list_head hba_node;
|
|
spinlock_t device_lock;
|
|
struct config_group hba_group;
|
|
struct mutex hba_access_mutex;
|
|
struct target_backend *backend;
|
|
};
|
|
|
|
struct se_tpg_np {
|
|
struct se_portal_group *tpg_np_parent;
|
|
struct config_group tpg_np_group;
|
|
};
|
|
|
|
static inline struct se_tpg_np *to_tpg_np(struct config_item *item)
|
|
{
|
|
return container_of(to_config_group(item), struct se_tpg_np,
|
|
tpg_np_group);
|
|
}
|
|
|
|
struct se_portal_group {
|
|
/*
|
|
* PROTOCOL IDENTIFIER value per SPC4, 7.5.1.
|
|
*
|
|
* Negative values can be used by fabric drivers for internal use TPGs.
|
|
*/
|
|
int proto_id;
|
|
bool enabled;
|
|
/* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
|
|
atomic_t tpg_pr_ref_count;
|
|
/* Spinlock for adding/removing ACLed Nodes */
|
|
struct mutex acl_node_mutex;
|
|
/* Spinlock for adding/removing sessions */
|
|
spinlock_t session_lock;
|
|
struct mutex tpg_lun_mutex;
|
|
/* linked list for initiator ACL list */
|
|
struct list_head acl_node_list;
|
|
struct hlist_head tpg_lun_hlist;
|
|
struct se_lun *tpg_virt_lun0;
|
|
/* List of TCM sessions associated wth this TPG */
|
|
struct list_head tpg_sess_list;
|
|
/* Pointer to $FABRIC_MOD dependent code */
|
|
const struct target_core_fabric_ops *se_tpg_tfo;
|
|
struct se_wwn *se_tpg_wwn;
|
|
struct config_group tpg_group;
|
|
struct config_group tpg_lun_group;
|
|
struct config_group tpg_np_group;
|
|
struct config_group tpg_acl_group;
|
|
struct config_group tpg_attrib_group;
|
|
struct config_group tpg_auth_group;
|
|
struct config_group tpg_param_group;
|
|
};
|
|
|
|
static inline struct se_portal_group *to_tpg(struct config_item *item)
|
|
{
|
|
return container_of(to_config_group(item), struct se_portal_group,
|
|
tpg_group);
|
|
}
|
|
|
|
static inline struct se_portal_group *attrib_to_tpg(struct config_item *item)
|
|
{
|
|
return container_of(to_config_group(item), struct se_portal_group,
|
|
tpg_attrib_group);
|
|
}
|
|
|
|
static inline struct se_portal_group *auth_to_tpg(struct config_item *item)
|
|
{
|
|
return container_of(to_config_group(item), struct se_portal_group,
|
|
tpg_auth_group);
|
|
}
|
|
|
|
static inline struct se_portal_group *param_to_tpg(struct config_item *item)
|
|
{
|
|
return container_of(to_config_group(item), struct se_portal_group,
|
|
tpg_param_group);
|
|
}
|
|
|
|
enum {
|
|
/* Use se_cmd's cpuid for completion */
|
|
SE_COMPL_AFFINITY_CPUID = -1,
|
|
/* Complete on current CPU */
|
|
SE_COMPL_AFFINITY_CURR_CPU = -2,
|
|
};
|
|
|
|
struct se_wwn {
|
|
struct target_fabric_configfs *wwn_tf;
|
|
void *priv;
|
|
struct config_group wwn_group;
|
|
struct config_group fabric_stat_group;
|
|
struct config_group param_group;
|
|
int cmd_compl_affinity;
|
|
};
|
|
|
|
static inline void atomic_inc_mb(atomic_t *v)
|
|
{
|
|
smp_mb__before_atomic();
|
|
atomic_inc(v);
|
|
smp_mb__after_atomic();
|
|
}
|
|
|
|
static inline void atomic_dec_mb(atomic_t *v)
|
|
{
|
|
smp_mb__before_atomic();
|
|
atomic_dec(v);
|
|
smp_mb__after_atomic();
|
|
}
|
|
|
|
static inline void target_free_tag(struct se_session *sess, struct se_cmd *cmd)
|
|
{
|
|
sbitmap_queue_clear(&sess->sess_tag_pool, cmd->map_tag, cmd->map_cpu);
|
|
}
|
|
|
|
#endif /* TARGET_CORE_BASE_H */
|