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