Initial import

1 files changed, 926 insertions, 0 deletions

diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
new file mode 100644
index 000000000..480e9f82d
--- /dev/null
+++ b/include/target/target_core_base.h
@@ -0,0 +1,926 @@
+#ifndef TARGET_CORE_BASE_H
+#define TARGET_CORE_BASE_H
+
+#include <linux/in.h>
+#include <linux/configfs.h>
+#include <linux/dma-mapping.h>
+#include <linux/blkdev.h>
+#include <linux/percpu_ida.h>
+#include <scsi/scsi_cmnd.h>
+#include <net/sock.h>
+#include <net/tcp.h>
+
+#define TARGET_CORE_MOD_VERSION		"v4.1.0"
+#define TARGET_CORE_VERSION		TARGET_CORE_MOD_VERSION
+
+/* Maximum Number of LUNs per Target Portal Group */
+/* Don't raise above 511 or REPORT_LUNS needs to handle >1 page */
+#define TRANSPORT_MAX_LUNS_PER_TPG		256
+/*
+ * By default we use 32-byte CDBs in TCM Core and subsystem plugin code.
+ *
+ * Note that both include/scsi/scsi_cmnd.h:MAX_COMMAND_SIZE and
+ * include/linux/blkdev.h:BLOCK_MAX_CDB as of v2.6.36-rc4 still use
+ * 16-byte CDBs by default and require an extra allocation for
+ * 32-byte CDBs to because of legacy issues.
+ *
+ * Within TCM Core there are no such legacy limitiations, so we go ahead
+ * use 32-byte CDBs by default and use include/scsi/scsi.h:scsi_command_size()
+ * within all TCM Core and subsystem plugin code.
+ */
+#define TCM_MAX_COMMAND_SIZE			32
+/*
+ * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
+ * defined 96, but the real limit is 252 (or 260 including the header)
+ */
+#define TRANSPORT_SENSE_BUFFER			SCSI_SENSE_BUFFERSIZE
+/* Used by transport_send_check_condition_and_sense() */
+#define SPC_SENSE_KEY_OFFSET			2
+#define SPC_ADD_SENSE_LEN_OFFSET		7
+#define SPC_DESC_TYPE_OFFSET			8
+#define SPC_ADDITIONAL_DESC_LEN_OFFSET		9
+#define SPC_VALIDITY_OFFSET			10
+#define SPC_ASC_KEY_OFFSET			12
+#define SPC_ASCQ_KEY_OFFSET			13
+#define TRANSPORT_IQN_LEN			224
+/* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
+#define LU_GROUP_NAME_BUF			256
+/* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
+#define TG_PT_GROUP_NAME_BUF			256
+/* Used to parse VPD into struct t10_vpd */
+#define VPD_TMP_BUF_SIZE			254
+/* Used by transport_generic_cmd_sequencer() */
+#define READ_BLOCK_LEN          		6
+#define READ_CAP_LEN            		8
+#define READ_POSITION_LEN       		20
+#define INQUIRY_LEN				36
+/* Used by transport_get_inquiry_vpd_serial() */
+#define INQUIRY_VPD_SERIAL_LEN			254
+/* Used by transport_get_inquiry_vpd_device_ident() */
+#define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN	254
+
+/* Attempts before moving from SHORT to LONG */
+#define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD	3
+#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT	3  /* In milliseconds */
+#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG	10 /* In milliseconds */
+
+#define PYX_TRANSPORT_STATUS_INTERVAL		5 /* In seconds */
+
+/* struct se_dev_attrib sanity values */
+/* Default max_unmap_lba_count */
+#define DA_MAX_UNMAP_LBA_COUNT			0
+/* Default max_unmap_block_desc_count */
+#define DA_MAX_UNMAP_BLOCK_DESC_COUNT		0
+/* Default unmap_granularity */
+#define DA_UNMAP_GRANULARITY_DEFAULT		0
+/* Default unmap_granularity_alignment */
+#define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT	0
+/* Default max_write_same_len, disabled by default */
+#define DA_MAX_WRITE_SAME_LEN			0
+/* Use a model alias based on the configfs backend device name */
+#define DA_EMULATE_MODEL_ALIAS			0
+/* Emulation for Direct Page Out */
+#define DA_EMULATE_DPO				0
+/* Emulation for Forced Unit Access WRITEs */
+#define DA_EMULATE_FUA_WRITE			1
+/* Emulation for Forced Unit Access READs */
+#define DA_EMULATE_FUA_READ			0
+/* Emulation for WriteCache and SYNCHRONIZE_CACHE */
+#define DA_EMULATE_WRITE_CACHE			0
+/* Emulation for UNIT ATTENTION Interlock Control */
+#define DA_EMULATE_UA_INTLLCK_CTRL		0
+/* Emulation for TASK_ABORTED status (TAS) by default */
+#define DA_EMULATE_TAS				1
+/* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
+#define DA_EMULATE_TPU				0
+/*
+ * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
+ * block/blk-lib.c:blkdev_issue_discard()
+ */
+#define DA_EMULATE_TPWS				0
+/* Emulation for CompareAndWrite (AtomicTestandSet) by default */
+#define DA_EMULATE_CAW				1
+/* Emulation for 3rd Party Copy (ExtendedCopy) by default */
+#define DA_EMULATE_3PC				1
+/* No Emulation for PSCSI by default */
+#define DA_EMULATE_ALUA				0
+/* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
+#define DA_ENFORCE_PR_ISIDS			1
+/* Force SPC-3 PR Activate Persistence across Target Power Loss */
+#define DA_FORCE_PR_APTPL			0
+#define DA_STATUS_MAX_SECTORS_MIN		16
+#define DA_STATUS_MAX_SECTORS_MAX		8192
+/* By default don't report non-rotating (solid state) medium */
+#define DA_IS_NONROT				0
+/* Queue Algorithm Modifier default for restricted reordering in control mode page */
+#define DA_EMULATE_REST_REORD			0
+
+#define SE_INQUIRY_BUF				1024
+#define SE_MODE_PAGE_BUF			512
+#define SE_SENSE_BUF				96
+
+/* struct se_hba->hba_flags */
+enum hba_flags_table {
+	HBA_FLAGS_INTERNAL_USE	= 0x01,
+	HBA_FLAGS_PSCSI_MODE	= 0x02,
+};
+
+/* struct se_lun->lun_status */
+enum transport_lun_status_table {
+	TRANSPORT_LUN_STATUS_FREE = 0,
+	TRANSPORT_LUN_STATUS_ACTIVE = 1,
+};
+
+/* struct se_portal_group->se_tpg_type */
+enum transport_tpg_type_table {
+	TRANSPORT_TPG_TYPE_NORMAL = 0,
+	TRANSPORT_TPG_TYPE_DISCOVERY = 1,
+};
+
+/* Special transport agnostic struct se_cmd->t_states */
+enum transport_state_table {
+	TRANSPORT_NO_STATE	= 0,
+	TRANSPORT_NEW_CMD	= 1,
+	TRANSPORT_WRITE_PENDING	= 3,
+	TRANSPORT_PROCESSING	= 5,
+	TRANSPORT_COMPLETE	= 6,
+	TRANSPORT_ISTATE_PROCESSING = 11,
+	TRANSPORT_COMPLETE_QF_WP = 18,
+	TRANSPORT_COMPLETE_QF_OK = 19,
+};
+
+/* Used for struct se_cmd->se_cmd_flags */
+enum se_cmd_flags_table {
+	SCF_SUPPORTED_SAM_OPCODE	= 0x00000001,
+	SCF_TRANSPORT_TASK_SENSE	= 0x00000002,
+	SCF_EMULATED_TASK_SENSE		= 0x00000004,
+	SCF_SCSI_DATA_CDB		= 0x00000008,
+	SCF_SCSI_TMR_CDB		= 0x00000010,
+	SCF_FUA				= 0x00000080,
+	SCF_SE_LUN_CMD			= 0x00000100,
+	SCF_BIDI			= 0x00000400,
+	SCF_SENT_CHECK_CONDITION	= 0x00000800,
+	SCF_OVERFLOW_BIT		= 0x00001000,
+	SCF_UNDERFLOW_BIT		= 0x00002000,
+	SCF_SEND_DELAYED_TAS		= 0x00004000,
+	SCF_ALUA_NON_OPTIMIZED		= 0x00008000,
+	SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000,
+	SCF_COMPARE_AND_WRITE		= 0x00080000,
+	SCF_COMPARE_AND_WRITE_POST	= 0x00100000,
+};
+
+/* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
+enum transport_lunflags_table {
+	TRANSPORT_LUNFLAGS_NO_ACCESS		= 0x00,
+	TRANSPORT_LUNFLAGS_INITIATOR_ACCESS	= 0x01,
+	TRANSPORT_LUNFLAGS_READ_ONLY		= 0x02,
+	TRANSPORT_LUNFLAGS_READ_WRITE		= 0x04,
+};
+
+/*
+ * Used by transport_send_check_condition_and_sense()
+ * to signal which ASC/ASCQ sense payload should be built.
+ */
+typedef unsigned __bitwise__ sense_reason_t;
+
+enum tcm_sense_reason_table {
+#define R(x)	(__force sense_reason_t )(x)
+	TCM_NO_SENSE				= R(0x00),
+	TCM_NON_EXISTENT_LUN			= R(0x01),
+	TCM_UNSUPPORTED_SCSI_OPCODE		= R(0x02),
+	TCM_INCORRECT_AMOUNT_OF_DATA		= R(0x03),
+	TCM_UNEXPECTED_UNSOLICITED_DATA		= R(0x04),
+	TCM_SERVICE_CRC_ERROR			= R(0x05),
+	TCM_SNACK_REJECTED			= R(0x06),
+	TCM_SECTOR_COUNT_TOO_MANY		= R(0x07),
+	TCM_INVALID_CDB_FIELD			= R(0x08),
+	TCM_INVALID_PARAMETER_LIST		= R(0x09),
+	TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE	= R(0x0a),
+	TCM_UNKNOWN_MODE_PAGE			= R(0x0b),
+	TCM_WRITE_PROTECTED			= R(0x0c),
+	TCM_CHECK_CONDITION_ABORT_CMD		= R(0x0d),
+	TCM_CHECK_CONDITION_UNIT_ATTENTION	= R(0x0e),
+	TCM_CHECK_CONDITION_NOT_READY		= R(0x0f),
+	TCM_RESERVATION_CONFLICT		= R(0x10),
+	TCM_ADDRESS_OUT_OF_RANGE		= R(0x11),
+	TCM_OUT_OF_RESOURCES			= R(0x12),
+	TCM_PARAMETER_LIST_LENGTH_ERROR		= R(0x13),
+	TCM_MISCOMPARE_VERIFY			= R(0x14),
+	TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED	= R(0x15),
+	TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED	= R(0x16),
+	TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED	= R(0x17),
+#undef R
+};
+
+enum target_sc_flags_table {
+	TARGET_SCF_BIDI_OP		= 0x01,
+	TARGET_SCF_ACK_KREF		= 0x02,
+	TARGET_SCF_UNKNOWN_SIZE		= 0x04,
+};
+
+/* fabric independent task management function values */
+enum tcm_tmreq_table {
+	TMR_ABORT_TASK		= 1,
+	TMR_ABORT_TASK_SET	= 2,
+	TMR_CLEAR_ACA		= 3,
+	TMR_CLEAR_TASK_SET	= 4,
+	TMR_LUN_RESET		= 5,
+	TMR_TARGET_WARM_RESET	= 6,
+	TMR_TARGET_COLD_RESET	= 7,
+};
+
+/* fabric independent task management response values */
+enum tcm_tmrsp_table {
+	TMR_FUNCTION_FAILED		= 0,
+	TMR_FUNCTION_COMPLETE		= 1,
+	TMR_TASK_DOES_NOT_EXIST		= 2,
+	TMR_LUN_DOES_NOT_EXIST		= 3,
+	TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED	= 4,
+	TMR_FUNCTION_REJECTED		= 5,
+};
+
+/*
+ * Used for target SCSI statistics
+ */
+typedef enum {
+	SCSI_INST_INDEX,
+	SCSI_DEVICE_INDEX,
+	SCSI_AUTH_INTR_INDEX,
+	SCSI_INDEX_TYPE_MAX
+} scsi_index_t;
+
+struct se_cmd;
+
+struct t10_alua_lba_map_member {
+	struct list_head lba_map_mem_list;
+	int lba_map_mem_alua_state;
+	int lba_map_mem_alua_pg_id;
+};
+
+struct t10_alua_lba_map {
+	u64 lba_map_first_lba;
+	u64 lba_map_last_lba;
+	struct list_head lba_map_list;
+	struct list_head lba_map_mem_list;
+};
+
+struct t10_alua {
+	/* ALUA Target Port Group ID */
+	u16	alua_tg_pt_gps_counter;
+	u32	alua_tg_pt_gps_count;
+	/* Referrals support */
+	spinlock_t lba_map_lock;
+	u32     lba_map_segment_size;
+	u32     lba_map_segment_multiplier;
+	struct list_head lba_map_list;
+	spinlock_t tg_pt_gps_lock;
+	struct se_device *t10_dev;
+	/* Used for default ALUA Target Port Group */
+	struct t10_alua_tg_pt_gp *default_tg_pt_gp;
+	/* Used for default ALUA Target Port Group ConfigFS group */
+	struct config_group alua_tg_pt_gps_group;
+	struct list_head tg_pt_gps_list;
+};
+
+struct t10_alua_lu_gp {
+	u16	lu_gp_id;
+	int	lu_gp_valid_id;
+	u32	lu_gp_members;
+	atomic_t lu_gp_ref_cnt;
+	spinlock_t lu_gp_lock;
+	struct config_group lu_gp_group;
+	struct list_head lu_gp_node;
+	struct list_head lu_gp_mem_list;
+};
+
+struct t10_alua_lu_gp_member {
+	bool lu_gp_assoc;
+	atomic_t lu_gp_mem_ref_cnt;
+	spinlock_t lu_gp_mem_lock;
+	struct t10_alua_lu_gp *lu_gp;
+	struct se_device *lu_gp_mem_dev;
+	struct list_head lu_gp_mem_list;
+};
+
+struct t10_alua_tg_pt_gp {
+	u16	tg_pt_gp_id;
+	int	tg_pt_gp_valid_id;
+	int	tg_pt_gp_alua_supported_states;
+	int	tg_pt_gp_alua_pending_state;
+	int	tg_pt_gp_alua_previous_state;
+	int	tg_pt_gp_alua_access_status;
+	int	tg_pt_gp_alua_access_type;
+	int	tg_pt_gp_nonop_delay_msecs;
+	int	tg_pt_gp_trans_delay_msecs;
+	int	tg_pt_gp_implicit_trans_secs;
+	int	tg_pt_gp_pref;
+	int	tg_pt_gp_write_metadata;
+	u32	tg_pt_gp_members;
+	atomic_t tg_pt_gp_alua_access_state;
+	atomic_t tg_pt_gp_ref_cnt;
+	spinlock_t tg_pt_gp_lock;
+	struct mutex tg_pt_gp_md_mutex;
+	struct se_device *tg_pt_gp_dev;
+	struct config_group tg_pt_gp_group;
+	struct list_head tg_pt_gp_list;
+	struct list_head tg_pt_gp_mem_list;
+	struct se_port *tg_pt_gp_alua_port;
+	struct se_node_acl *tg_pt_gp_alua_nacl;
+	struct delayed_work tg_pt_gp_transition_work;
+	struct completion *tg_pt_gp_transition_complete;
+};
+
+struct t10_alua_tg_pt_gp_member {
+	bool tg_pt_gp_assoc;
+	atomic_t tg_pt_gp_mem_ref_cnt;
+	spinlock_t tg_pt_gp_mem_lock;
+	struct t10_alua_tg_pt_gp *tg_pt_gp;
+	struct se_port *tg_pt;
+	struct list_head tg_pt_gp_mem_list;
+};
+
+struct t10_vpd {
+	unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
+	int protocol_identifier_set;
+	u32 protocol_identifier;
+	u32 device_identifier_code_set;
+	u32 association;
+	u32 device_identifier_type;
+	struct list_head vpd_list;
+};
+
+struct t10_wwn {
+	char vendor[8];
+	char model[16];
+	char revision[4];
+	char unit_serial[INQUIRY_VPD_SERIAL_LEN];
+	spinlock_t t10_vpd_lock;
+	struct se_device *t10_dev;
+	struct config_group t10_wwn_group;
+	struct list_head t10_vpd_list;
+};
+
+struct t10_pr_registration {
+	/* Used for fabrics that contain WWN+ISID */
+#define PR_REG_ISID_LEN				16
+	/* PR_REG_ISID_LEN + ',i,0x' */
+#define PR_REG_ISID_ID_LEN			(PR_REG_ISID_LEN + 5)
+	char pr_reg_isid[PR_REG_ISID_LEN];
+	/* Used during APTPL metadata reading */
+#define PR_APTPL_MAX_IPORT_LEN			256
+	unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
+	/* Used during APTPL metadata reading */
+#define PR_APTPL_MAX_TPORT_LEN			256
+	unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
+	u16 pr_aptpl_rpti;
+	u16 pr_reg_tpgt;
+	/* Reservation effects all target ports */
+	int pr_reg_all_tg_pt;
+	/* Activate Persistence across Target Power Loss */
+	int pr_reg_aptpl;
+	int pr_res_holder;
+	int pr_res_type;
+	int pr_res_scope;
+	/* Used for fabric initiator WWPNs using a ISID */
+	bool isid_present_at_reg;
+	u32 pr_res_mapped_lun;
+	u32 pr_aptpl_target_lun;
+	u32 pr_res_generation;
+	u64 pr_reg_bin_isid;
+	u64 pr_res_key;
+	atomic_t pr_res_holders;
+	struct se_node_acl *pr_reg_nacl;
+	struct se_dev_entry *pr_reg_deve;
+	struct se_lun *pr_reg_tg_pt_lun;
+	struct list_head pr_reg_list;
+	struct list_head pr_reg_abort_list;
+	struct list_head pr_reg_aptpl_list;
+	struct list_head pr_reg_atp_list;
+	struct list_head pr_reg_atp_mem_list;
+};
+
+struct t10_reservation {
+	/* Reservation effects all target ports */
+	int pr_all_tg_pt;
+	/* Activate Persistence across Target Power Loss enabled
+	 * for SCSI device */
+	int pr_aptpl_active;
+#define PR_APTPL_BUF_LEN			262144
+	u32 pr_generation;
+	spinlock_t registration_lock;
+	spinlock_t aptpl_reg_lock;
+	/*
+	 * This will always be set by one individual I_T Nexus.
+	 * However with all_tg_pt=1, other I_T Nexus from the
+	 * same initiator can access PR reg/res info on a different
+	 * target port.
+	 *
+	 * There is also the 'All Registrants' case, where there is
+	 * a single *pr_res_holder of the reservation, but all
+	 * registrations are considered reservation holders.
+	 */
+	struct se_node_acl *pr_res_holder;
+	struct list_head registration_list;
+	struct list_head aptpl_reg_list;
+};
+
+struct se_tmr_req {
+	/* Task Management function to be performed */
+	u8			function;
+	/* Task Management response to send */
+	u8			response;
+	int			call_transport;
+	/* Reference to ITT that Task Mgmt should be performed */
+	u32			ref_task_tag;
+	void 			*fabric_tmr_ptr;
+	struct se_cmd		*task_cmd;
+	struct se_device	*tmr_dev;
+	struct se_lun		*tmr_lun;
+	struct list_head	tmr_list;
+};
+
+enum target_prot_op {
+	TARGET_PROT_NORMAL	= 0,
+	TARGET_PROT_DIN_INSERT	= (1 << 0),
+	TARGET_PROT_DOUT_INSERT	= (1 << 1),
+	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,
+};
+
+enum target_core_dif_check {
+	TARGET_DIF_CHECK_GUARD  = 0x1 << 0,
+	TARGET_DIF_CHECK_APPTAG = 0x1 << 1,
+	TARGET_DIF_CHECK_REFTAG = 0x1 << 2,
+};
+
+struct se_dif_v1_tuple {
+	__be16			guard_tag;
+	__be16			app_tag;
+	__be32			ref_tag;
+};
+
+/* 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 {
+	/* SAM response code being sent to initiator */
+	u8			scsi_status;
+	u8			scsi_asc;
+	u8			scsi_ascq;
+	u16			scsi_sense_length;
+	/* 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;
+	/* Transport protocol dependent state, see transport_state_table */
+	enum transport_state_table t_state;
+	unsigned		cmd_wait_set:1;
+	unsigned		unknown_data_length:1;
+	/* See se_cmd_flags_table */
+	u32			se_cmd_flags;
+	u32			se_ordered_id;
+	/* Total size in bytes associated with command */
+	u32			data_length;
+	u32			residual_count;
+	u32			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_dev_entry   *se_deve;
+	struct se_lun		*se_lun;
+	/* Only used for internal passthrough and legacy TCM fabric modules */
+	struct se_session	*se_sess;
+	struct se_tmr_req	*se_tmr_req;
+	struct list_head	se_cmd_list;
+	struct completion	cmd_wait_comp;
+	struct kref		cmd_kref;
+	const struct target_core_fabric_ops *se_tfo;
+	sense_reason_t		(*execute_cmd)(struct se_cmd *);
+	sense_reason_t		(*execute_rw)(struct se_cmd *, struct scatterlist *,
+					      u32, enum dma_data_direction);
+	sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool);
+
+	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_DEV_ACTIVE	(1 << 7)
+#define CMD_T_REQUEST_STOP	(1 << 8)
+#define CMD_T_BUSY		(1 << 9)
+	spinlock_t		t_state_lock;
+	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;
+
+	struct list_head	state_list;
+	bool			state_active;
+
+	/* old task stop completion, consider merging with some of the above */
+	struct completion	task_stop_comp;
+
+	/* backend private data */
+	void			*priv;
+
+	/* Used for lun->lun_ref counting */
+	int			lun_ref_active;
+
+	/* DIF related members */
+	enum target_prot_op	prot_op;
+	enum target_prot_type	prot_type;
+	u8			prot_checks;
+	u32			prot_length;
+	u32			reftag_seed;
+	struct scatterlist	*t_prot_sg;
+	unsigned int		t_prot_nents;
+	sense_reason_t		pi_err;
+	sector_t		bad_sector;
+	bool			prot_pto;
+};
+
+struct se_ua {
+	u8			ua_asc;
+	u8			ua_ascq;
+	struct se_node_acl	*ua_nacl;
+	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			acl_stop:1;
+	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 se_dev_entry	**device_list;
+	struct se_session	*nacl_sess;
+	struct se_portal_group *se_tpg;
+	spinlock_t		device_list_lock;
+	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 config_group	*acl_default_groups[5];
+	struct list_head	acl_list;
+	struct list_head	acl_sess_list;
+	struct completion	acl_free_comp;
+	struct kref		acl_kref;
+};
+
+struct se_session {
+	unsigned		sess_tearing_down:1;
+	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;
+	struct list_head	sess_cmd_list;
+	struct list_head	sess_wait_list;
+	spinlock_t		sess_cmd_lock;
+	struct kref		sess_kref;
+	void			*sess_cmd_map;
+	struct percpu_ida	sess_tag_pool;
+};
+
+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 {
+	char			initiatorname[TRANSPORT_IQN_LEN];
+	u32			mapped_lun;
+	struct se_node_acl	*se_lun_nacl;
+	struct se_lun		*se_lun;
+	struct list_head	lacl_list;
+	struct config_group	se_lun_group;
+	struct se_ml_stat_grps	ml_stat_grps;
+};
+
+struct se_dev_entry {
+	bool			def_pr_registered;
+	/* See transport_lunflags_table */
+	u32			lun_flags;
+	u32			mapped_lun;
+	u32			total_cmds;
+	u64			pr_res_key;
+	u64			creation_time;
+	u32			attach_count;
+	u64			read_bytes;
+	u64			write_bytes;
+	atomic_t		ua_count;
+	/* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
+	atomic_t		pr_ref_count;
+	struct se_lun_acl	*se_lun_acl;
+	spinlock_t		ua_lock;
+	struct se_lun		*se_lun;
+	struct list_head	alua_port_list;
+	struct list_head	ua_list;
+};
+
+struct se_dev_attrib {
+	int		emulate_model_alias;
+	int		emulate_dpo;
+	int		emulate_fua_write;
+	int		emulate_fua_read;
+	int		emulate_write_cache;
+	int		emulate_ua_intlck_ctrl;
+	int		emulate_tas;
+	int		emulate_tpu;
+	int		emulate_tpws;
+	int		emulate_caw;
+	int		emulate_3pc;
+	int		pi_prot_format;
+	enum target_prot_type pi_prot_type;
+	enum target_prot_type hw_pi_prot_type;
+	int		enforce_pr_isids;
+	int		force_pr_aptpl;
+	int		is_nonrot;
+	int		emulate_rest_reord;
+	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;
+	u32		max_bytes_per_io;
+	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 se_lun {
+#define SE_LUN_LINK_MAGIC			0xffff7771
+	u32			lun_link_magic;
+	/* See transport_lun_status_table */
+	enum transport_lun_status_table lun_status;
+	u32			lun_access;
+	u32			lun_flags;
+	u32			unpacked_lun;
+	atomic_t		lun_acl_count;
+	spinlock_t		lun_acl_lock;
+	spinlock_t		lun_sep_lock;
+	struct completion	lun_shutdown_comp;
+	struct list_head	lun_acl_list;
+	struct se_device	*lun_se_dev;
+	struct se_port		*lun_sep;
+	struct config_group	lun_group;
+	struct se_port_stat_grps port_stat_grps;
+	struct completion	lun_ref_comp;
+	struct percpu_ref	lun_ref;
+};
+
+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_device {
+#define SE_DEV_LINK_MAGIC			0xfeeddeef
+	u32			dev_link_magic;
+	/* 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
+	u32			dev_port_count;
+	/* 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		num_cmds;
+	atomic_long_t		read_bytes;
+	atomic_long_t		write_bytes;
+	/* Active commands on this virtual SE device */
+	atomic_t		simple_cmds;
+	atomic_t		dev_ordered_id;
+	atomic_t		dev_ordered_sync;
+	atomic_t		dev_qf_count;
+	int			export_count;
+	spinlock_t		delayed_cmd_lock;
+	spinlock_t		execute_task_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 reservationsa */
+	struct se_node_acl	*dev_reserved_node_acl;
+	/* 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 workqueue_struct *tmr_wq;
+	struct work_struct	qf_work_queue;
+	struct list_head	delayed_cmd_list;
+	struct list_head	state_list;
+	struct list_head	qf_cmd_list;
+	struct list_head	g_dev_node;
+	/* 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_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 */
+	struct se_subsystem_api *transport;
+	/* Linked list for struct se_hba struct se_device list */
+	struct list_head	dev_list;
+	struct se_lun		xcopy_lun;
+	/* Protection Information */
+	int			prot_length;
+};
+
+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 se_subsystem_api *transport;
+};
+
+struct scsi_port_stats {
+       u64     cmd_pdus;
+       u64     tx_data_octets;
+       u64     rx_data_octets;
+};
+
+struct se_port {
+	/* RELATIVE TARGET PORT IDENTIFER */
+	u16		sep_rtpi;
+	int		sep_tg_pt_secondary_stat;
+	int		sep_tg_pt_secondary_write_md;
+	u32		sep_index;
+	struct scsi_port_stats sep_stats;
+	/* Used for ALUA Target Port Groups membership */
+	atomic_t	sep_tg_pt_secondary_offline;
+	/* Used for PR ALL_TG_PT=1 */
+	atomic_t	sep_tg_pt_ref_cnt;
+	spinlock_t	sep_alua_lock;
+	struct mutex	sep_tg_pt_md_mutex;
+	struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
+	struct se_lun *sep_lun;
+	struct se_portal_group *sep_tpg;
+	struct list_head sep_alua_list;
+	struct list_head sep_list;
+};
+
+struct se_tpg_np {
+	struct se_portal_group *tpg_np_parent;
+	struct config_group	tpg_np_group;
+};
+
+struct se_portal_group {
+	/* Type of target portal group, see transport_tpg_type_table */
+	enum transport_tpg_type_table se_tpg_type;
+	/* Number of ACLed Initiator Nodes for this TPG */
+	u32			num_node_acls;
+	/* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
+	atomic_t		tpg_pr_ref_count;
+	/* Spinlock for adding/removing ACLed Nodes */
+	spinlock_t		acl_node_lock;
+	/* Spinlock for adding/removing sessions */
+	spinlock_t		session_lock;
+	spinlock_t		tpg_lun_lock;
+	/* Pointer to $FABRIC_MOD portal group */
+	void			*se_tpg_fabric_ptr;
+	struct list_head	se_tpg_node;
+	/* linked list for initiator ACL list */
+	struct list_head	acl_node_list;
+	struct se_lun		**tpg_lun_list;
+	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_default_groups[7];
+	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;
+};
+
+struct se_wwn {
+	struct target_fabric_configfs *wwn_tf;
+	struct config_group	wwn_group;
+	struct config_group	*wwn_default_groups[2];
+	struct config_group	fabric_stat_group;
+};
+
+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();
+}
+
+#endif /* TARGET_CORE_BASE_H */