1 #ifndef TARGET_CORE_FABRIC_H 2 #define TARGET_CORE_FABRIC_H 3 4 struct target_core_fabric_ops { 5 struct module *module; 6 const char *name; 7 char *(*get_fabric_name)(void); 8 u8 (*get_fabric_proto_ident)(struct se_portal_group *); 9 char *(*tpg_get_wwn)(struct se_portal_group *); 10 u16 (*tpg_get_tag)(struct se_portal_group *); 11 u32 (*tpg_get_default_depth)(struct se_portal_group *); 12 u32 (*tpg_get_pr_transport_id)(struct se_portal_group *, 13 struct se_node_acl *, 14 struct t10_pr_registration *, int *, 15 unsigned char *); 16 u32 (*tpg_get_pr_transport_id_len)(struct se_portal_group *, 17 struct se_node_acl *, 18 struct t10_pr_registration *, int *); 19 char *(*tpg_parse_pr_out_transport_id)(struct se_portal_group *, 20 const char *, u32 *, char **); 21 int (*tpg_check_demo_mode)(struct se_portal_group *); 22 int (*tpg_check_demo_mode_cache)(struct se_portal_group *); 23 int (*tpg_check_demo_mode_write_protect)(struct se_portal_group *); 24 int (*tpg_check_prod_mode_write_protect)(struct se_portal_group *); 25 /* 26 * Optionally used by fabrics to allow demo-mode login, but not 27 * expose any TPG LUNs, and return 'not connected' in standard 28 * inquiry response 29 */ 30 int (*tpg_check_demo_mode_login_only)(struct se_portal_group *); 31 /* 32 * Optionally used as a configfs tunable to determine when 33 * target-core should signal the PROTECT=1 feature bit for 34 * backends that don't support T10-PI, so that either fabric 35 * HW offload or target-core emulation performs the associated 36 * WRITE_STRIP and READ_INSERT operations. 37 */ 38 int (*tpg_check_prot_fabric_only)(struct se_portal_group *); 39 struct se_node_acl *(*tpg_alloc_fabric_acl)( 40 struct se_portal_group *); 41 void (*tpg_release_fabric_acl)(struct se_portal_group *, 42 struct se_node_acl *); 43 u32 (*tpg_get_inst_index)(struct se_portal_group *); 44 /* 45 * Optional to release struct se_cmd and fabric dependent allocated 46 * I/O descriptor in transport_cmd_check_stop(). 47 * 48 * Returning 1 will signal a descriptor has been released. 49 * Returning 0 will signal a descriptor has not been released. 50 */ 51 int (*check_stop_free)(struct se_cmd *); 52 void (*release_cmd)(struct se_cmd *); 53 void (*put_session)(struct se_session *); 54 /* 55 * Called with spin_lock_bh(struct se_portal_group->session_lock held. 56 */ 57 int (*shutdown_session)(struct se_session *); 58 void (*close_session)(struct se_session *); 59 u32 (*sess_get_index)(struct se_session *); 60 /* 61 * Used only for SCSI fabrics that contain multi-value TransportIDs 62 * (like iSCSI). All other SCSI fabrics should set this to NULL. 63 */ 64 u32 (*sess_get_initiator_sid)(struct se_session *, 65 unsigned char *, u32); 66 int (*write_pending)(struct se_cmd *); 67 int (*write_pending_status)(struct se_cmd *); 68 void (*set_default_node_attributes)(struct se_node_acl *); 69 u32 (*get_task_tag)(struct se_cmd *); 70 int (*get_cmd_state)(struct se_cmd *); 71 int (*queue_data_in)(struct se_cmd *); 72 int (*queue_status)(struct se_cmd *); 73 void (*queue_tm_rsp)(struct se_cmd *); 74 void (*aborted_task)(struct se_cmd *); 75 /* 76 * fabric module calls for target_core_fabric_configfs.c 77 */ 78 struct se_wwn *(*fabric_make_wwn)(struct target_fabric_configfs *, 79 struct config_group *, const char *); 80 void (*fabric_drop_wwn)(struct se_wwn *); 81 struct se_portal_group *(*fabric_make_tpg)(struct se_wwn *, 82 struct config_group *, const char *); 83 void (*fabric_drop_tpg)(struct se_portal_group *); 84 int (*fabric_post_link)(struct se_portal_group *, 85 struct se_lun *); 86 void (*fabric_pre_unlink)(struct se_portal_group *, 87 struct se_lun *); 88 struct se_tpg_np *(*fabric_make_np)(struct se_portal_group *, 89 struct config_group *, const char *); 90 void (*fabric_drop_np)(struct se_tpg_np *); 91 struct se_node_acl *(*fabric_make_nodeacl)(struct se_portal_group *, 92 struct config_group *, const char *); 93 void (*fabric_drop_nodeacl)(struct se_node_acl *); 94 95 struct configfs_attribute **tfc_discovery_attrs; 96 struct configfs_attribute **tfc_wwn_attrs; 97 struct configfs_attribute **tfc_tpg_base_attrs; 98 struct configfs_attribute **tfc_tpg_np_base_attrs; 99 struct configfs_attribute **tfc_tpg_attrib_attrs; 100 struct configfs_attribute **tfc_tpg_auth_attrs; 101 struct configfs_attribute **tfc_tpg_param_attrs; 102 struct configfs_attribute **tfc_tpg_nacl_base_attrs; 103 struct configfs_attribute **tfc_tpg_nacl_attrib_attrs; 104 struct configfs_attribute **tfc_tpg_nacl_auth_attrs; 105 struct configfs_attribute **tfc_tpg_nacl_param_attrs; 106 }; 107 108 int target_register_template(const struct target_core_fabric_ops *fo); 109 void target_unregister_template(const struct target_core_fabric_ops *fo); 110 111 int target_depend_item(struct config_item *item); 112 void target_undepend_item(struct config_item *item); 113 114 struct se_session *transport_init_session(enum target_prot_op); 115 int transport_alloc_session_tags(struct se_session *, unsigned int, 116 unsigned int); 117 struct se_session *transport_init_session_tags(unsigned int, unsigned int, 118 enum target_prot_op); 119 void __transport_register_session(struct se_portal_group *, 120 struct se_node_acl *, struct se_session *, void *); 121 void transport_register_session(struct se_portal_group *, 122 struct se_node_acl *, struct se_session *, void *); 123 void target_get_session(struct se_session *); 124 void target_put_session(struct se_session *); 125 ssize_t target_show_dynamic_sessions(struct se_portal_group *, char *); 126 void transport_free_session(struct se_session *); 127 void target_put_nacl(struct se_node_acl *); 128 void transport_deregister_session_configfs(struct se_session *); 129 void transport_deregister_session(struct se_session *); 130 131 132 void transport_init_se_cmd(struct se_cmd *, 133 const struct target_core_fabric_ops *, 134 struct se_session *, u32, int, int, unsigned char *); 135 sense_reason_t transport_lookup_cmd_lun(struct se_cmd *, u32); 136 sense_reason_t target_setup_cmd_from_cdb(struct se_cmd *, unsigned char *); 137 int target_submit_cmd_map_sgls(struct se_cmd *, struct se_session *, 138 unsigned char *, unsigned char *, u32, u32, int, int, int, 139 struct scatterlist *, u32, struct scatterlist *, u32, 140 struct scatterlist *, u32); 141 int target_submit_cmd(struct se_cmd *, struct se_session *, unsigned char *, 142 unsigned char *, u32, u32, int, int, int); 143 int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess, 144 unsigned char *sense, u32 unpacked_lun, 145 void *fabric_tmr_ptr, unsigned char tm_type, 146 gfp_t, unsigned int, int); 147 int transport_handle_cdb_direct(struct se_cmd *); 148 sense_reason_t transport_generic_new_cmd(struct se_cmd *); 149 150 void target_execute_cmd(struct se_cmd *cmd); 151 152 int transport_generic_free_cmd(struct se_cmd *, int); 153 154 bool transport_wait_for_tasks(struct se_cmd *); 155 int transport_check_aborted_status(struct se_cmd *, int); 156 int transport_send_check_condition_and_sense(struct se_cmd *, 157 sense_reason_t, int); 158 int target_get_sess_cmd(struct se_session *, struct se_cmd *, bool); 159 int target_put_sess_cmd(struct se_session *, struct se_cmd *); 160 void target_sess_cmd_list_set_waiting(struct se_session *); 161 void target_wait_for_sess_cmds(struct se_session *); 162 163 int core_alua_check_nonop_delay(struct se_cmd *); 164 165 int core_tmr_alloc_req(struct se_cmd *, void *, u8, gfp_t); 166 void core_tmr_release_req(struct se_tmr_req *); 167 int transport_generic_handle_tmr(struct se_cmd *); 168 void transport_generic_request_failure(struct se_cmd *, sense_reason_t); 169 void __target_execute_cmd(struct se_cmd *); 170 int transport_lookup_tmr_lun(struct se_cmd *, u32); 171 172 struct se_node_acl *core_tpg_get_initiator_node_acl(struct se_portal_group *tpg, 173 unsigned char *); 174 struct se_node_acl *core_tpg_check_initiator_node_acl(struct se_portal_group *, 175 unsigned char *); 176 void core_tpg_clear_object_luns(struct se_portal_group *); 177 struct se_node_acl *core_tpg_add_initiator_node_acl(struct se_portal_group *, 178 struct se_node_acl *, const char *, u32); 179 int core_tpg_del_initiator_node_acl(struct se_portal_group *, 180 struct se_node_acl *, int); 181 int core_tpg_set_initiator_node_queue_depth(struct se_portal_group *, 182 unsigned char *, u32, int); 183 int core_tpg_set_initiator_node_tag(struct se_portal_group *, 184 struct se_node_acl *, const char *); 185 int core_tpg_register(const struct target_core_fabric_ops *, 186 struct se_wwn *, struct se_portal_group *, void *, int); 187 int core_tpg_deregister(struct se_portal_group *); 188 189 /* SAS helpers */ 190 u8 sas_get_fabric_proto_ident(struct se_portal_group *); 191 u32 sas_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *, 192 struct t10_pr_registration *, int *, unsigned char *); 193 u32 sas_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *, 194 struct t10_pr_registration *, int *); 195 char *sas_parse_pr_out_transport_id(struct se_portal_group *, const char *, 196 u32 *, char **); 197 198 /* FC helpers */ 199 u8 fc_get_fabric_proto_ident(struct se_portal_group *); 200 u32 fc_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *, 201 struct t10_pr_registration *, int *, unsigned char *); 202 u32 fc_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *, 203 struct t10_pr_registration *, int *); 204 char *fc_parse_pr_out_transport_id(struct se_portal_group *, const char *, 205 u32 *, char **); 206 207 /* iSCSI helpers */ 208 u8 iscsi_get_fabric_proto_ident(struct se_portal_group *); 209 u32 iscsi_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *, 210 struct t10_pr_registration *, int *, unsigned char *); 211 u32 iscsi_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *, 212 struct t10_pr_registration *, int *); 213 char *iscsi_parse_pr_out_transport_id(struct se_portal_group *, const char *, 214 u32 *, char **); 215 216 /* 217 * The LIO target core uses DMA_TO_DEVICE to mean that data is going 218 * to the target (eg handling a WRITE) and DMA_FROM_DEVICE to mean 219 * that data is coming from the target (eg handling a READ). However, 220 * this is just the opposite of what we have to tell the DMA mapping 221 * layer -- eg when handling a READ, the HBA will have to DMA the data 222 * out of memory so it can send it to the initiator, which means we 223 * need to use DMA_TO_DEVICE when we map the data. 224 */ 225 static inline enum dma_data_direction 226 target_reverse_dma_direction(struct se_cmd *se_cmd) 227 { 228 if (se_cmd->se_cmd_flags & SCF_BIDI) 229 return DMA_BIDIRECTIONAL; 230 231 switch (se_cmd->data_direction) { 232 case DMA_TO_DEVICE: 233 return DMA_FROM_DEVICE; 234 case DMA_FROM_DEVICE: 235 return DMA_TO_DEVICE; 236 case DMA_NONE: 237 default: 238 return DMA_NONE; 239 } 240 } 241 242 #endif /* TARGET_CORE_FABRICH */ 243