include/target/target_core_fabric.h

Source file repositories/reference/linux-study-clean/include/target/target_core_fabric.h

File Facts

System
Linux kernel
Corpus path
include/target/target_core_fabric.h
Extension
.h
Size
10711 bytes
Lines
263
Domain
Repository Root And Misc
Bucket
include
Inferred role
Repository Root And Misc: implementation source
Status
source implementation candidate

Why This File Exists

Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.

Dependency Surface

Detected Declarations

Annotated Snippet

struct target_core_fabric_ops {
	struct module *module;
	/*
	 * XXX: Special case for iscsi/iSCSI...
	 * If non-null, fabric_alias is used for matching target/$fabric
	 * ConfigFS paths. If null, fabric_name is used for this (see below).
	 */
	const char *fabric_alias;
	/*
	 * fabric_name is used for matching target/$fabric ConfigFS paths
	 * without a fabric_alias (see above). It's also used for the ALUA state
	 * path and is stored on disk with PR state.
	 */
	const char *fabric_name;
	size_t node_acl_size;
	/*
	 * Limits number of scatterlist entries per SCF_SCSI_DATA_CDB payload.
	 * Setting this value tells target-core to enforce this limit, and
	 * report as INQUIRY EVPD=b0 MAXIMUM TRANSFER LENGTH.
	 *
	 * target-core will currently reset se_cmd->data_length to this
	 * maximum size, and set UNDERFLOW residual count if length exceeds
	 * this limit.
	 *
	 * XXX: Not all initiator hosts honor this block-limit EVPD
	 * XXX: Currently assumes single PAGE_SIZE per scatterlist entry
	 */
	u32 max_data_sg_nents;
	char *(*tpg_get_wwn)(struct se_portal_group *);
	u16 (*tpg_get_tag)(struct se_portal_group *);
	u32 (*tpg_get_default_depth)(struct se_portal_group *);
	int (*tpg_check_demo_mode)(struct se_portal_group *);
	int (*tpg_check_demo_mode_cache)(struct se_portal_group *);
	int (*tpg_check_demo_mode_write_protect)(struct se_portal_group *);
	int (*tpg_check_prod_mode_write_protect)(struct se_portal_group *);
	/*
	 * Optionally used by fabrics to allow demo-mode login, but not
	 * expose any TPG LUNs, and return 'not connected' in standard
	 * inquiry response
	 */
	int (*tpg_check_demo_mode_login_only)(struct se_portal_group *);
	/*
	 * Optionally used as a configfs tunable to determine when
	 * target-core should signal the PROTECT=1 feature bit for
	 * backends that don't support T10-PI, so that either fabric
	 * HW offload or target-core emulation performs the associated
	 * WRITE_STRIP and READ_INSERT operations.
	 */
	int (*tpg_check_prot_fabric_only)(struct se_portal_group *);
	u32 (*tpg_get_inst_index)(struct se_portal_group *);
	/*
	 * Optional to release struct se_cmd and fabric dependent allocated
	 * I/O descriptor after command execution has finished.
	 *
	 * Returning 1 will signal a descriptor has been released.
	 * Returning 0 will signal a descriptor has not been released.
	 */
	int (*check_stop_free)(struct se_cmd *);
	void (*release_cmd)(struct se_cmd *);
	void (*close_session)(struct se_session *);
	u32 (*sess_get_index)(struct se_session *);
	/*
	 * Used only for SCSI fabrics that contain multi-value TransportIDs
	 * (like iSCSI).  All other SCSI fabrics should set this to NULL.
	 */
	u32 (*sess_get_initiator_sid)(struct se_session *,
				      unsigned char *, u32);
	int (*write_pending)(struct se_cmd *);
	void (*set_default_node_attributes)(struct se_node_acl *);
	int (*get_cmd_state)(struct se_cmd *);
	int (*queue_data_in)(struct se_cmd *);
	int (*queue_status)(struct se_cmd *);
	void (*queue_tm_rsp)(struct se_cmd *);
	void (*aborted_task)(struct se_cmd *);
	/*
	 * fabric module calls for target_core_fabric_configfs.c
	 */
	struct se_wwn *(*fabric_make_wwn)(struct target_fabric_configfs *,
				struct config_group *, const char *);
	void (*fabric_drop_wwn)(struct se_wwn *);
	void (*add_wwn_groups)(struct se_wwn *);
	struct se_portal_group *(*fabric_make_tpg)(struct se_wwn *,
						   const char *);
	int (*fabric_enable_tpg)(struct se_portal_group *se_tpg, bool enable);
	void (*fabric_drop_tpg)(struct se_portal_group *);
	int (*fabric_post_link)(struct se_portal_group *,
				struct se_lun *);
	void (*fabric_pre_unlink)(struct se_portal_group *,
				struct se_lun *);
	struct se_tpg_np *(*fabric_make_np)(struct se_portal_group *,

Annotation

Implementation Notes