#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 <scsi/scsi_cmnd.h>#include <net/sock.h>#include <net/tcp.h> #define TARGET_CORE_MOD_VERSION		"v4.1.0-rc2-ml"#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_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			128/* 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_subsystem_dev->su_dev_flags*/#define SDF_FIRMWARE_VPD_UNIT_SERIAL		0x00000001#define SDF_EMULATED_VPD_UNIT_SERIAL		0x00000002#define SDF_USING_UDEV_PATH			0x00000004#define SDF_USING_ALIAS				0x00000008 /* * struct se_device->dev_flags */#define DF_SPC2_RESERVATIONS			0x00000001#define DF_SPC2_RESERVATIONS_WITH_ISID		0x00000002 /* 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 transfer length */#define DA_FABRIC_MAX_SECTORS			8192/* 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/* No Emulation for PSCSI by default */#define DA_EMULATE_RESERVATIONS			0/* 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#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				512#define SE_MODE_PAGE_BUF			512 /* 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_PROCESS_WRITE	= 4,	TRANSPORT_PROCESSING	= 5,	TRANSPORT_COMPLETE	= 6,	TRANSPORT_PROCESS_TMR	= 9,	TRANSPORT_ISTATE_PROCESSING = 11,	TRANSPORT_NEW_CMD_MAP	= 16,	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_SG_IO_CDB		= 0x00000008,	SCF_SCSI_CONTROL_SG_IO_CDB	= 0x00000010,	SCF_SCSI_NON_DATA_CDB		= 0x00000020,	SCF_SCSI_TMR_CDB		= 0x00000040,	SCF_SCSI_CDB_EXCEPTION		= 0x00000080,	SCF_SCSI_RESERVATION_CONFLICT	= 0x00000100,	SCF_FUA				= 0x00000200,	SCF_SE_LUN_CMD			= 0x00000800,	SCF_SE_ALLOW_EOO		= 0x00001000,	SCF_BIDI			= 0x00002000,	SCF_SENT_CHECK_CONDITION	= 0x00004000,	SCF_OVERFLOW_BIT		= 0x00008000,	SCF_UNDERFLOW_BIT		= 0x00010000,	SCF_SENT_DELAYED_TAS		= 0x00020000,	SCF_ALUA_NON_OPTIMIZED		= 0x00040000,	SCF_DELAYED_CMD_FROM_SAM_ATTR	= 0x00080000,	SCF_UNUSED			= 0x00100000,	SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00200000,	SCF_ACK_KREF			= 0x00400000,}; /* 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,}; /* struct se_device->dev_status */enum transport_device_status_table {	TRANSPORT_DEVICE_ACTIVATED		= 0x01,	TRANSPORT_DEVICE_DEACTIVATED		= 0x02,	TRANSPORT_DEVICE_QUEUE_FULL		= 0x04,	TRANSPORT_DEVICE_SHUTDOWN		= 0x08,	TRANSPORT_DEVICE_OFFLINE_ACTIVATED	= 0x10,	TRANSPORT_DEVICE_OFFLINE_DEACTIVATED	= 0x20,}; /* * Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason * to signal which ASC/ASCQ sense payload should be built. */enum tcm_sense_reason_table {	TCM_NON_EXISTENT_LUN			= 0x01,	TCM_UNSUPPORTED_SCSI_OPCODE		= 0x02,	TCM_INCORRECT_AMOUNT_OF_DATA		= 0x03,	TCM_UNEXPECTED_UNSOLICITED_DATA		= 0x04,	TCM_SERVICE_CRC_ERROR			= 0x05,	TCM_SNACK_REJECTED			= 0x06,	TCM_SECTOR_COUNT_TOO_MANY		= 0x07,	TCM_INVALID_CDB_FIELD			= 0x08,	TCM_INVALID_PARAMETER_LIST		= 0x09,	TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE	= 0x0a,	TCM_UNKNOWN_MODE_PAGE			= 0x0b,	TCM_WRITE_PROTECTED			= 0x0c,	TCM_CHECK_CONDITION_ABORT_CMD		= 0x0d,	TCM_CHECK_CONDITION_UNIT_ATTENTION	= 0x0e,	TCM_CHECK_CONDITION_NOT_READY		= 0x0f,	TCM_RESERVATION_CONFLICT		= 0x10,}; 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,	TMR_FABRIC_TMR		= 255,}; /* fabric independent task management response values */enum tcm_tmrsp_table {	TMR_FUNCTION_COMPLETE		= 0,	TMR_TASK_DOES_NOT_EXIST		= 1,	TMR_LUN_DOES_NOT_EXIST		= 2,	TMR_TASK_STILL_ALLEGIANT	= 3,	TMR_TASK_FAILOVER_NOT_SUPPORTED	= 4,	TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED	= 5,	TMR_FUNCTION_AUTHORIZATION_FAILED = 6,	TMR_FUNCTION_REJECTED		= 255,}; struct se_obj {	atomic_t obj_access_count;}; /* * Used by TCM Core internally to signal if ALUA emulation is enabled or * disabled, or running in with TCM/pSCSI passthrough mode */typedef enum {	SPC_ALUA_PASSTHROUGH,	SPC2_ALUA_DISABLED,	SPC3_ALUA_EMULATED} t10_alua_index_t; /* * Used by TCM Core internally to signal if SAM Task Attribute emulation * is enabled or disabled, or running in with TCM/pSCSI passthrough mode */typedef enum {	SAM_TASK_ATTR_PASSTHROUGH,	SAM_TASK_ATTR_UNTAGGED,	SAM_TASK_ATTR_EMULATED} t10_task_attr_index_t; /* * 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 {	t10_alua_index_t alua_type;	/* ALUA Target Port Group ID */	u16	alua_tg_pt_gps_counter;	u32	alua_tg_pt_gps_count;	spinlock_t tg_pt_gps_lock;	struct se_subsystem_dev *t10_sub_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;	int (*alua_state_check)(struct se_cmd *, unsigned char *, u8 *);	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_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_implict_trans_secs;	int	tg_pt_gp_pref;	int	tg_pt_gp_write_metadata;	/* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */#define ALUA_MD_BUF_LEN				1024	u32	tg_pt_gp_md_buf_len;	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_subsystem_dev *tg_pt_gp_su_dev;	struct config_group tg_pt_gp_group;	struct list_head tg_pt_gp_list;	struct list_head tg_pt_gp_mem_list;}; 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_subsystem_dev *t10_sub_dev;	struct config_group t10_wwn_group;	struct list_head t10_vpd_list;};  /* * Used by TCM Core internally to signal if >= SPC-3 persistent reservations * emulation is enabled or disabled, or running in with TCM/pSCSI passthrough * mode */typedef enum {	SPC_PASSTHROUGH,	SPC2_RESERVATIONS,	SPC3_PERSISTENT_RESERVATIONS} t10_reservations_index_t; 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];	/* For writing out live meta data */	unsigned char *pr_aptpl_buf;	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;}; /* * This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS, * SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c: * core_setup_reservations() */struct t10_reservation_ops {	int (*t10_reservation_check)(struct se_cmd *, u32 *);	int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32);	int (*t10_pr_register)(struct se_cmd *);	int (*t10_pr_clear)(struct se_cmd *);}; 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;	/* Used by struct t10_reservation->pr_aptpl_buf_len */#define PR_APTPL_BUF_LEN			8192	u32 pr_aptpl_buf_len;	u32 pr_generation;	t10_reservations_index_t res_type;	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 t10_reservation_ops pr_ops;}; struct se_queue_obj {	atomic_t		queue_cnt;	spinlock_t		cmd_queue_lock;	struct list_head	qobj_list;	wait_queue_head_t	thread_wq;}; 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;	/* 64-bit encoded SAM LUN from $FABRIC_MOD TMR header */	u64			ref_task_lun;	void 			*fabric_tmr_ptr;	struct se_cmd		*task_cmd;	struct se_cmd		*ref_cmd;	struct se_device	*tmr_dev;	struct se_lun		*tmr_lun;	struct list_head	tmr_list;}; struct se_cmd {	/* SAM response code being sent to initiator */

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