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