cregit-Linux how code gets into the kernel

Release 4.7 include/target/target_core_base.h

Directory: include/target
#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 <linux/t10-pi.h>
#include <net/sock.h>
#include <net/tcp.h>


#define TARGET_CORE_VERSION		"v5.0"

/*
 * Maximum size of a CDB that can be stored in se_cmd without allocating
 * memory dynamically for the CDB.
 */

#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			96
/* 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 unmap_zeroes_data */

#define DA_UNMAP_ZEROES_DATA_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 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,
};

/* 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,
	
SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = 0x00200000,
	
SCF_ACK_KREF			= 0x00400000,
	
SCF_USE_CPUID			= 0x00800000,
};

/*
 * 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,
	
TARGET_SCF_USE_CPUID	= 0x08,
};

/* 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_lun_list;
	
struct se_lun *tg_pt_gp_alua_lun;
	
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_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;
	
u64 pr_res_mapped_lun;
	
u64 pr_aptpl_target_lun;
	
u16 tg_pt_sep_rtpi;
	
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;
	/* Used by ALL_TG_PT=1 registration with deve->pr_ref taken */
	
struct se_dev_entry *pr_reg_deve;
	
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 */
	
u64			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,
};

/* 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;
	
unsigned		cmd_wait_set:1;
	
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;
	/* 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 se_tmr_req	*se_tmr_req;
	
struct list_head	se_cmd_list;
	
struct completion	cmd_wait_comp;
	
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_DEV_ACTIVE	(1 << 7)

#define CMD_T_BUSY		(1 << 9)

#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;
	
sector_t		bad_sector;
	
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;
	
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);
}


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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);
}


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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);
}


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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);
}


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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);
}


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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;
	
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 {
	
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;
	
atomic_t		ua_count;
	/* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
	
struct kref		pr_kref;
	
struct completion	pr_comp;
	
struct se_lun_acl __rcu	*se_lun_acl;
	
spinlock_t		ua_lock;
	
struct se_lun __rcu	*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 {
	
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;
	
int		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;
	
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 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;

#define SE_LUN_LINK_MAGIC			0xffff7771
	
u32			lun_link_magic;
	
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 *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_ref_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_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

#define DF_READ_ONLY				0x00000020
	/* 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_sync;
	
atomic_t		dev_qf_count;
	
u32			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 */
	
const struct target_backend_ops *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;
	/* For se_lun->lun_se_dev RCU read-side critical access */
	
u32			hba_index;
	
struct rcu_head		rcu_head;
};


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);
}


Contributors
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christoph hellwigchristoph hellwig28100.00%1100.00%


Total28100.00%1100.00%




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;
	/* 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;
	
struct list_head	se_tpg_node;
	/* 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);
}


Contributors
PersonTokensPropCommitsCommitProp
christoph hellwigchristoph hellwig28100.00%1100.00%


Total28100.00%1100.00%






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);
}


Contributors
PersonTokensPropCommitsCommitProp
christoph hellwigchristoph hellwig28100.00%1100.00%


Total28100.00%1100.00%






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);
}


Contributors
PersonTokensPropCommitsCommitProp
christoph hellwigchristoph hellwig28100.00%1100.00%


Total28100.00%1100.00%






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);
}


Contributors
PersonTokensPropCommitsCommitProp
christoph hellwigchristoph hellwig28100.00%1100.00%


Total28100.00%1100.00%




struct se_wwn {
	
struct target_fabric_configfs *wwn_tf;
	
struct config_group	wwn_group;
	
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();
}


Contributors
PersonTokensPropCommitsCommitProp
joern engeljoern engel22100.00%1100.00%


Total22100.00%1100.00%






static inline void atomic_dec_mb(atomic_t *v)
{
	smp_mb__before_atomic();
	atomic_dec(v);
	smp_mb__after_atomic();
}


Contributors
PersonTokensPropCommitsCommitProp
joern engeljoern engel22100.00%1100.00%


Total22100.00%1100.00%



#endif /* TARGET_CORE_BASE_H */

Overall Contributors
PersonTokensPropCommitsCommitProp
nicholas bellingernicholas bellinger180060.91%5043.86%


christoph hellwigchristoph hellwig75725.62%2219.30%


andy groverandy grover1113.76%87.02%


hannes reineckehannes reinecke973.28%87.02%


joern engeljoern engel481.62%21.75%


roland dreierroland dreier471.59%65.26%


sagi grimbergsagi grimberg421.42%32.63%


quinn tranquinn tran110.37%21.75%


tregaron baylytregaron bayly80.27%10.88%


bart van asschebart van assche80.27%43.51%


jamie pocasjamie pocas80.27%10.88%


dan carpenterdan carpenter40.14%21.75%


paolo bonzinipaolo bonzini40.14%10.88%


sebastian andrzej siewiorsebastian andrzej siewior40.14%10.88%


akinobu mitaakinobu mita40.14%10.88%


lucas de marchilucas de marchi10.03%10.88%


alex leungalex leung10.03%10.88%


Total2955100.00%114100.00%

  
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