-smx_action_t SIMIX_file_read(smx_process_t process, const char* storage, void* ptr, size_t size, size_t nmemb, smx_file_t stream);
-smx_action_t SIMIX_file_write(smx_process_t process, const char* storage, const void* ptr, size_t size, size_t nmemb, smx_file_t stream);
-smx_action_t SIMIX_file_open(smx_process_t process, const char* storage, const char* path, const char* mode);
-smx_action_t SIMIX_file_close(smx_process_t process, const char* storage, smx_file_t fp);
-smx_action_t SIMIX_file_stat(smx_process_t process, const char* storage, smx_file_t fd, s_file_stat_t buf);
+XBT_PRIVATE smx_activity_t SIMIX_file_read(surf_file_t fd, sg_size_t size, sg_host_t host);
+XBT_PRIVATE smx_activity_t SIMIX_file_write(surf_file_t fd, sg_size_t size, sg_host_t host);
+XBT_PRIVATE smx_activity_t SIMIX_file_open(const char* mount, const char* path, sg_storage_t st);
+XBT_PRIVATE smx_activity_t SIMIX_file_close(surf_file_t fd, sg_host_t host);
+XBT_PRIVATE int SIMIX_file_unlink(surf_file_t fd, sg_host_t host);
+XBT_PRIVATE sg_size_t SIMIX_file_get_size(surf_file_t fd);
+XBT_PRIVATE sg_size_t SIMIX_file_tell(surf_file_t fd);
+XBT_PRIVATE int SIMIX_file_seek(surf_file_t fd, sg_offset_t offset, int origin);
+XBT_PRIVATE int SIMIX_file_move(smx_actor_t process, surf_file_t fd, const char* fullpath);