Build provider 3rd arg from smb_request_t
hacking...

*** 76,87 ****
                  (void) snprintf(path, MAXPATHLEN, "%s%05u", identifier, new_id);
          }
  
          op->create_disposition = FILE_OVERWRITE_IF;
          op->create_options = FILE_NON_DIRECTORY_FILE;
!         DTRACE_SMB_2(op__OpenPrintFile__start, smb_request_t *, sr,
!             struct open_param *, op);
  
          return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR);
  }
  
  void
--- 76,86 ----
                  (void) snprintf(path, MAXPATHLEN, "%s%05u", identifier, new_id);
          }
  
          op->create_disposition = FILE_OVERWRITE_IF;
          op->create_options = FILE_NON_DIRECTORY_FILE;
!         DTRACE_SMB_1(op__OpenPrintFile__start, smb_request_t *, sr); /* arg.open */
  
          return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR);
  }
  
  void