| #ifndef TARGET_CORE_FABRIC_H |
| #define TARGET_CORE_FABRIC_H |
| |
| struct target_core_fabric_ops { |
| struct module *module; |
| const char *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 *(*get_fabric_name)(void); |
| 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 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 *); |
| /* |
| * 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 *); |
| 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 *); |
| int (*fabric_init_nodeacl)(struct se_node_acl *, const char *); |
| void (*fabric_cleanup_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 *target_alloc_session(struct se_portal_group *, |
| unsigned int, unsigned int, enum target_prot_op prot_op, |
| const char *, void *, |
| int (*callback)(struct se_portal_group *, |
| struct se_session *, void *)); |
| |
| 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 *); |
| int 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 *, u64); |
| 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 *, u64, 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 *, u64, u32, int, int, int); |
| int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess, |
| unsigned char *sense, u64 unpacked_lun, |
| void *fabric_tmr_ptr, unsigned char tm_type, |
| gfp_t, u64, 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_cmd *, bool); |
| int target_put_sess_cmd(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 *, u64); |
| void core_allocate_nexus_loss_ua(struct se_node_acl *acl); |
| |
| struct se_node_acl *core_tpg_get_initiator_node_acl(struct se_portal_group *tpg, |
| unsigned char *); |
| bool target_tpg_has_node_acl(struct se_portal_group *tpg, |
| const char *); |
| struct se_node_acl *core_tpg_check_initiator_node_acl(struct se_portal_group *, |
| unsigned char *); |
| int core_tpg_set_initiator_node_queue_depth(struct se_node_acl *, u32); |
| int core_tpg_set_initiator_node_tag(struct se_portal_group *, |
| struct se_node_acl *, const char *); |
| int core_tpg_register(struct se_wwn *, struct se_portal_group *, int); |
| int core_tpg_deregister(struct se_portal_group *); |
| |
| /* |
| * 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 */ |