209 lines
8.7 KiB
C
209 lines
8.7 KiB
C
#ifndef TARGET_CORE_FABRIC_H
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#define TARGET_CORE_FABRIC_H
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struct target_core_fabric_ops {
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struct configfs_subsystem *tf_subsys;
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char *(*get_fabric_name)(void);
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u8 (*get_fabric_proto_ident)(struct se_portal_group *);
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char *(*tpg_get_wwn)(struct se_portal_group *);
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u16 (*tpg_get_tag)(struct se_portal_group *);
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u32 (*tpg_get_default_depth)(struct se_portal_group *);
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u32 (*tpg_get_pr_transport_id)(struct se_portal_group *,
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struct se_node_acl *,
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struct t10_pr_registration *, int *,
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unsigned char *);
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u32 (*tpg_get_pr_transport_id_len)(struct se_portal_group *,
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struct se_node_acl *,
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struct t10_pr_registration *, int *);
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char *(*tpg_parse_pr_out_transport_id)(struct se_portal_group *,
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const char *, u32 *, char **);
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int (*tpg_check_demo_mode)(struct se_portal_group *);
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int (*tpg_check_demo_mode_cache)(struct se_portal_group *);
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int (*tpg_check_demo_mode_write_protect)(struct se_portal_group *);
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int (*tpg_check_prod_mode_write_protect)(struct se_portal_group *);
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/*
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* Optionally used by fabrics to allow demo-mode login, but not
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* expose any TPG LUNs, and return 'not connected' in standard
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* inquiry response
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*/
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int (*tpg_check_demo_mode_login_only)(struct se_portal_group *);
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struct se_node_acl *(*tpg_alloc_fabric_acl)(
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struct se_portal_group *);
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void (*tpg_release_fabric_acl)(struct se_portal_group *,
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struct se_node_acl *);
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u32 (*tpg_get_inst_index)(struct se_portal_group *);
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/*
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* Optional to release struct se_cmd and fabric dependent allocated
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* I/O descriptor in transport_cmd_check_stop().
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*
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* Returning 1 will signal a descriptor has been released.
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* Returning 0 will signal a descriptor has not been released.
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*/
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int (*check_stop_free)(struct se_cmd *);
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void (*release_cmd)(struct se_cmd *);
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void (*put_session)(struct se_session *);
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/*
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* Called with spin_lock_bh(struct se_portal_group->session_lock held.
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*/
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int (*shutdown_session)(struct se_session *);
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void (*close_session)(struct se_session *);
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u32 (*sess_get_index)(struct se_session *);
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/*
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* Used only for SCSI fabrics that contain multi-value TransportIDs
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* (like iSCSI). All other SCSI fabrics should set this to NULL.
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*/
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u32 (*sess_get_initiator_sid)(struct se_session *,
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unsigned char *, u32);
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int (*write_pending)(struct se_cmd *);
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int (*write_pending_status)(struct se_cmd *);
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void (*set_default_node_attributes)(struct se_node_acl *);
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u32 (*get_task_tag)(struct se_cmd *);
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int (*get_cmd_state)(struct se_cmd *);
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int (*queue_data_in)(struct se_cmd *);
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int (*queue_status)(struct se_cmd *);
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void (*queue_tm_rsp)(struct se_cmd *);
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/*
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* fabric module calls for target_core_fabric_configfs.c
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*/
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struct se_wwn *(*fabric_make_wwn)(struct target_fabric_configfs *,
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struct config_group *, const char *);
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void (*fabric_drop_wwn)(struct se_wwn *);
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struct se_portal_group *(*fabric_make_tpg)(struct se_wwn *,
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struct config_group *, const char *);
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void (*fabric_drop_tpg)(struct se_portal_group *);
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int (*fabric_post_link)(struct se_portal_group *,
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struct se_lun *);
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void (*fabric_pre_unlink)(struct se_portal_group *,
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struct se_lun *);
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struct se_tpg_np *(*fabric_make_np)(struct se_portal_group *,
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struct config_group *, const char *);
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void (*fabric_drop_np)(struct se_tpg_np *);
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struct se_node_acl *(*fabric_make_nodeacl)(struct se_portal_group *,
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struct config_group *, const char *);
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void (*fabric_drop_nodeacl)(struct se_node_acl *);
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};
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struct se_session *transport_init_session(void);
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int transport_alloc_session_tags(struct se_session *, unsigned int,
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unsigned int);
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struct se_session *transport_init_session_tags(unsigned int, unsigned int);
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void __transport_register_session(struct se_portal_group *,
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struct se_node_acl *, struct se_session *, void *);
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void transport_register_session(struct se_portal_group *,
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struct se_node_acl *, struct se_session *, void *);
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void target_get_session(struct se_session *);
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void target_put_session(struct se_session *);
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void transport_free_session(struct se_session *);
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void target_put_nacl(struct se_node_acl *);
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void transport_deregister_session_configfs(struct se_session *);
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void transport_deregister_session(struct se_session *);
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void transport_init_se_cmd(struct se_cmd *, struct target_core_fabric_ops *,
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struct se_session *, u32, int, int, unsigned char *);
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sense_reason_t transport_lookup_cmd_lun(struct se_cmd *, u32);
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sense_reason_t target_setup_cmd_from_cdb(struct se_cmd *, unsigned char *);
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int target_submit_cmd_map_sgls(struct se_cmd *, struct se_session *,
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unsigned char *, unsigned char *, u32, u32, int, int, int,
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struct scatterlist *, u32, struct scatterlist *, u32);
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int target_submit_cmd(struct se_cmd *, struct se_session *, unsigned char *,
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unsigned char *, u32, u32, int, int, int);
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int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
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unsigned char *sense, u32 unpacked_lun,
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void *fabric_tmr_ptr, unsigned char tm_type,
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gfp_t, unsigned int, int);
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int transport_handle_cdb_direct(struct se_cmd *);
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sense_reason_t transport_generic_new_cmd(struct se_cmd *);
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void target_execute_cmd(struct se_cmd *cmd);
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int transport_generic_free_cmd(struct se_cmd *, int);
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bool transport_wait_for_tasks(struct se_cmd *);
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int transport_check_aborted_status(struct se_cmd *, int);
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int transport_send_check_condition_and_sense(struct se_cmd *,
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sense_reason_t, int);
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int target_get_sess_cmd(struct se_session *, struct se_cmd *, bool);
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int target_put_sess_cmd(struct se_session *, struct se_cmd *);
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void target_sess_cmd_list_set_waiting(struct se_session *);
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void target_wait_for_sess_cmds(struct se_session *);
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int core_alua_check_nonop_delay(struct se_cmd *);
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int core_tmr_alloc_req(struct se_cmd *, void *, u8, gfp_t);
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void core_tmr_release_req(struct se_tmr_req *);
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int transport_generic_handle_tmr(struct se_cmd *);
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void transport_generic_request_failure(struct se_cmd *, sense_reason_t);
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void __target_execute_cmd(struct se_cmd *);
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int transport_lookup_tmr_lun(struct se_cmd *, u32);
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struct se_node_acl *core_tpg_check_initiator_node_acl(struct se_portal_group *,
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unsigned char *);
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void core_tpg_clear_object_luns(struct se_portal_group *);
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struct se_node_acl *core_tpg_add_initiator_node_acl(struct se_portal_group *,
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struct se_node_acl *, const char *, u32);
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int core_tpg_del_initiator_node_acl(struct se_portal_group *,
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struct se_node_acl *, int);
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int core_tpg_set_initiator_node_queue_depth(struct se_portal_group *,
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unsigned char *, u32, int);
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int core_tpg_set_initiator_node_tag(struct se_portal_group *,
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struct se_node_acl *, const char *);
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int core_tpg_register(struct target_core_fabric_ops *, struct se_wwn *,
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struct se_portal_group *, void *, int);
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int core_tpg_deregister(struct se_portal_group *);
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/* SAS helpers */
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u8 sas_get_fabric_proto_ident(struct se_portal_group *);
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u32 sas_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
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struct t10_pr_registration *, int *, unsigned char *);
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u32 sas_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
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struct t10_pr_registration *, int *);
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char *sas_parse_pr_out_transport_id(struct se_portal_group *, const char *,
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u32 *, char **);
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/* FC helpers */
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u8 fc_get_fabric_proto_ident(struct se_portal_group *);
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u32 fc_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
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struct t10_pr_registration *, int *, unsigned char *);
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u32 fc_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
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struct t10_pr_registration *, int *);
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char *fc_parse_pr_out_transport_id(struct se_portal_group *, const char *,
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u32 *, char **);
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/* iSCSI helpers */
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u8 iscsi_get_fabric_proto_ident(struct se_portal_group *);
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u32 iscsi_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
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struct t10_pr_registration *, int *, unsigned char *);
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u32 iscsi_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
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struct t10_pr_registration *, int *);
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char *iscsi_parse_pr_out_transport_id(struct se_portal_group *, const char *,
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u32 *, char **);
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/*
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* The LIO target core uses DMA_TO_DEVICE to mean that data is going
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* to the target (eg handling a WRITE) and DMA_FROM_DEVICE to mean
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* that data is coming from the target (eg handling a READ). However,
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* this is just the opposite of what we have to tell the DMA mapping
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* layer -- eg when handling a READ, the HBA will have to DMA the data
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* out of memory so it can send it to the initiator, which means we
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* need to use DMA_TO_DEVICE when we map the data.
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*/
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static inline enum dma_data_direction
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target_reverse_dma_direction(struct se_cmd *se_cmd)
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{
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if (se_cmd->se_cmd_flags & SCF_BIDI)
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return DMA_BIDIRECTIONAL;
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switch (se_cmd->data_direction) {
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case DMA_TO_DEVICE:
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return DMA_FROM_DEVICE;
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case DMA_FROM_DEVICE:
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return DMA_TO_DEVICE;
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case DMA_NONE:
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default:
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return DMA_NONE;
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}
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}
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#endif /* TARGET_CORE_FABRICH */
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