target_core_fabric.h 8.7 KB

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