Initial import

1 files changed, 242 insertions, 0 deletions

diff --git a/include/target/target_core_fabric.h b/include/target/target_core_fabric.h
new file mode 100644
index 000000000..0f4dc3768
--- /dev/null
+++ b/include/target/target_core_fabric.h
@@ -0,0 +1,242 @@
+#ifndef TARGET_CORE_FABRIC_H
+#define TARGET_CORE_FABRIC_H
+
+struct target_core_fabric_ops {
+	struct module *module;
+	const char *name;
+	char *(*get_fabric_name)(void);
+	u8 (*get_fabric_proto_ident)(struct se_portal_group *);
+	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 *);
+	u32 (*tpg_get_pr_transport_id)(struct se_portal_group *,
+				struct se_node_acl *,
+				struct t10_pr_registration *, int *,
+				unsigned char *);
+	u32 (*tpg_get_pr_transport_id_len)(struct se_portal_group *,
+				struct se_node_acl *,
+				struct t10_pr_registration *, int *);
+	char *(*tpg_parse_pr_out_transport_id)(struct se_portal_group *,
+				const char *, u32 *, char **);
+	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 *);
+	struct se_node_acl *(*tpg_alloc_fabric_acl)(
+					struct se_portal_group *);
+	void (*tpg_release_fabric_acl)(struct se_portal_group *,
+					struct se_node_acl *);
+	u32 (*tpg_get_inst_index)(struct se_portal_group *);
+	/*
+	 * Optional to release struct se_cmd and fabric dependent allocated
+	 * I/O descriptor in transport_cmd_check_stop().
+	 *
+	 * 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 (*put_session)(struct se_session *);
+	/*
+	 * Called with spin_lock_bh(struct se_portal_group->session_lock held.
+	 */
+	int (*shutdown_session)(struct se_session *);
+	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 *);
+	int (*write_pending_status)(struct se_cmd *);
+	void (*set_default_node_attributes)(struct se_node_acl *);
+	u32 (*get_task_tag)(struct se_cmd *);
+	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 *);
+	struct se_portal_group *(*fabric_make_tpg)(struct se_wwn *,
+				struct config_group *, const char *);
+	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 *,
+				struct config_group *, const char *);
+	void (*fabric_drop_np)(struct se_tpg_np *);
+	struct se_node_acl *(*fabric_make_nodeacl)(struct se_portal_group *,
+				struct config_group *, const char *);
+	void (*fabric_drop_nodeacl)(struct se_node_acl *);
+
+	struct configfs_attribute **tfc_discovery_attrs;
+	struct configfs_attribute **tfc_wwn_attrs;
+	struct configfs_attribute **tfc_tpg_base_attrs;
+	struct configfs_attribute **tfc_tpg_np_base_attrs;
+	struct configfs_attribute **tfc_tpg_attrib_attrs;
+	struct configfs_attribute **tfc_tpg_auth_attrs;
+	struct configfs_attribute **tfc_tpg_param_attrs;
+	struct configfs_attribute **tfc_tpg_nacl_base_attrs;
+	struct configfs_attribute **tfc_tpg_nacl_attrib_attrs;
+	struct configfs_attribute **tfc_tpg_nacl_auth_attrs;
+	struct configfs_attribute **tfc_tpg_nacl_param_attrs;
+};
+
+int target_register_template(const struct target_core_fabric_ops *fo);
+void target_unregister_template(const struct target_core_fabric_ops *fo);
+
+int target_depend_item(struct config_item *item);
+void target_undepend_item(struct config_item *item);
+
+struct se_session *transport_init_session(enum target_prot_op);
+int transport_alloc_session_tags(struct se_session *, unsigned int,
+		unsigned int);
+struct se_session *transport_init_session_tags(unsigned int, unsigned int,
+		enum target_prot_op);
+void	__transport_register_session(struct se_portal_group *,
+		struct se_node_acl *, struct se_session *, void *);
+void	transport_register_session(struct se_portal_group *,
+		struct se_node_acl *, struct se_session *, void *);
+void	target_get_session(struct se_session *);
+void	target_put_session(struct se_session *);
+ssize_t	target_show_dynamic_sessions(struct se_portal_group *, char *);
+void	transport_free_session(struct se_session *);
+void	target_put_nacl(struct se_node_acl *);
+void	transport_deregister_session_configfs(struct se_session *);
+void	transport_deregister_session(struct se_session *);
+
+
+void	transport_init_se_cmd(struct se_cmd *,
+		const struct target_core_fabric_ops *,
+		struct se_session *, u32, int, int, unsigned char *);
+sense_reason_t transport_lookup_cmd_lun(struct se_cmd *, u32);
+sense_reason_t target_setup_cmd_from_cdb(struct se_cmd *, unsigned char *);
+int	target_submit_cmd_map_sgls(struct se_cmd *, struct se_session *,
+		unsigned char *, unsigned char *, u32, u32, int, int, int,
+		struct scatterlist *, u32, struct scatterlist *, u32,
+		struct scatterlist *, u32);
+int	target_submit_cmd(struct se_cmd *, struct se_session *, unsigned char *,
+		unsigned char *, u32, u32, int, int, int);
+int	target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
+		unsigned char *sense, u32 unpacked_lun,
+		void *fabric_tmr_ptr, unsigned char tm_type,
+		gfp_t, unsigned int, int);
+int	transport_handle_cdb_direct(struct se_cmd *);
+sense_reason_t	transport_generic_new_cmd(struct se_cmd *);
+
+void	target_execute_cmd(struct se_cmd *cmd);
+
+int	transport_generic_free_cmd(struct se_cmd *, int);
+
+bool	transport_wait_for_tasks(struct se_cmd *);
+int	transport_check_aborted_status(struct se_cmd *, int);
+int	transport_send_check_condition_and_sense(struct se_cmd *,
+		sense_reason_t, int);
+int	target_get_sess_cmd(struct se_session *, struct se_cmd *, bool);
+int	target_put_sess_cmd(struct se_session *, struct se_cmd *);
+void	target_sess_cmd_list_set_waiting(struct se_session *);
+void	target_wait_for_sess_cmds(struct se_session *);
+
+int	core_alua_check_nonop_delay(struct se_cmd *);
+
+int	core_tmr_alloc_req(struct se_cmd *, void *, u8, gfp_t);
+void	core_tmr_release_req(struct se_tmr_req *);
+int	transport_generic_handle_tmr(struct se_cmd *);
+void	transport_generic_request_failure(struct se_cmd *, sense_reason_t);
+void	__target_execute_cmd(struct se_cmd *);
+int	transport_lookup_tmr_lun(struct se_cmd *, u32);
+
+struct se_node_acl *core_tpg_get_initiator_node_acl(struct se_portal_group *tpg,
+		unsigned char *);
+struct se_node_acl *core_tpg_check_initiator_node_acl(struct se_portal_group *,
+		unsigned char *);
+void	core_tpg_clear_object_luns(struct se_portal_group *);
+struct se_node_acl *core_tpg_add_initiator_node_acl(struct se_portal_group *,
+		struct se_node_acl *, const char *, u32);
+int	core_tpg_del_initiator_node_acl(struct se_portal_group *,
+		struct se_node_acl *, int);
+int	core_tpg_set_initiator_node_queue_depth(struct se_portal_group *,
+		unsigned char *, u32, int);
+int	core_tpg_set_initiator_node_tag(struct se_portal_group *,
+		struct se_node_acl *, const char *);
+int	core_tpg_register(const struct target_core_fabric_ops *,
+		struct se_wwn *, struct se_portal_group *, void *, int);
+int	core_tpg_deregister(struct se_portal_group *);
+
+/* SAS helpers */
+u8	sas_get_fabric_proto_ident(struct se_portal_group *);
+u32	sas_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
+		struct t10_pr_registration *, int *, unsigned char *);
+u32	sas_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
+		struct t10_pr_registration *, int *);
+char	*sas_parse_pr_out_transport_id(struct se_portal_group *, const char *,
+		u32 *, char **);
+
+/* FC helpers */
+u8	fc_get_fabric_proto_ident(struct se_portal_group *);
+u32	fc_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
+		struct t10_pr_registration *, int *, unsigned char *);
+u32	fc_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
+		struct t10_pr_registration *, int *);
+char	*fc_parse_pr_out_transport_id(struct se_portal_group *, const char *,
+		u32 *, char **);
+
+/* iSCSI helpers */
+u8	iscsi_get_fabric_proto_ident(struct se_portal_group *);
+u32	iscsi_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
+		struct t10_pr_registration *, int *, unsigned char *);
+u32	iscsi_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
+		struct t10_pr_registration *, int *);
+char	*iscsi_parse_pr_out_transport_id(struct se_portal_group *, const char *,
+		u32 *, char **);
+
+/*
+ * The LIO target core uses DMA_TO_DEVICE to mean that data is going
+ * to the target (eg handling a WRITE) and DMA_FROM_DEVICE to mean
+ * that data is coming from the target (eg handling a READ).  However,
+ * this is just the opposite of what we have to tell the DMA mapping
+ * layer -- eg when handling a READ, the HBA will have to DMA the data
+ * out of memory so it can send it to the initiator, which means we
+ * need to use DMA_TO_DEVICE when we map the data.
+ */
+static inline enum dma_data_direction
+target_reverse_dma_direction(struct se_cmd *se_cmd)
+{
+	if (se_cmd->se_cmd_flags & SCF_BIDI)
+		return DMA_BIDIRECTIONAL;
+
+	switch (se_cmd->data_direction) {
+	case DMA_TO_DEVICE:
+		return DMA_FROM_DEVICE;
+	case DMA_FROM_DEVICE:
+		return DMA_TO_DEVICE;
+	case DMA_NONE:
+	default:
+		return DMA_NONE;
+	}
+}
+
+#endif /* TARGET_CORE_FABRICH */