42                   Option
60 /* Send an option request.
62  * The request is for option @opt, with @data containing @len bytes of
81     stl_be_p(&req.option, opt);  in nbd_send_option_request()
85         error_prepend(errp, "Failed to send option request header: ");  in nbd_send_option_request()
90         error_prepend(errp, "Failed to send option request data: ");  in nbd_send_option_request()
110 /* Receive the header of an option reply, which should match the given
118     if (nbd_read(ioc, reply, sizeof(*reply), "option reply", errp) < 0) {  in nbd_receive_option_reply()
123     reply->option = be32_to_cpu(reply->option);  in nbd_receive_option_reply()
127     trace_nbd_receive_option_reply(reply->option, nbd_opt_lookup(reply->option),  in nbd_receive_option_reply()
132         error_setg(errp, "Unexpected option reply magic");  in nbd_receive_option_reply()
136     if (reply->option != opt) {  in nbd_receive_option_reply()
137         error_setg(errp, "Unexpected option type %u (%s), expected %u (%s)",  in nbd_receive_option_reply()
138                    reply->option, nbd_opt_lookup(reply->option),  in nbd_receive_option_reply()
173             error_prepend(errp, "Failed to read option error %" PRIu32  in nbd_handle_reply_err()
184         trace_nbd_reply_err_ignored(reply->option,  in nbd_handle_reply_err()
185                                     nbd_opt_lookup(reply->option),  in nbd_handle_reply_err()
192         error_setg(errp, "Denied by server for option %" PRIu32 " (%s)",  in nbd_handle_reply_err()
193                    reply->option, nbd_opt_lookup(reply->option));  in nbd_handle_reply_err()
197         error_setg(errp, "Invalid parameters for option %" PRIu32 " (%s)",  in nbd_handle_reply_err()
198                    reply->option, nbd_opt_lookup(reply->option));  in nbd_handle_reply_err()
202         error_setg(errp, "Server lacks support for option %" PRIu32 " (%s)",  in nbd_handle_reply_err()
203                    reply->option, nbd_opt_lookup(reply->option));  in nbd_handle_reply_err()
207         error_setg(errp, "TLS negotiation required before option %" PRIu32  in nbd_handle_reply_err()
208                    " (%s)", reply->option, nbd_opt_lookup(reply->option));  in nbd_handle_reply_err()
217         error_setg(errp, "Server shutting down before option %" PRIu32 " (%s)",  in nbd_handle_reply_err()
218                    reply->option, nbd_opt_lookup(reply->option));  in nbd_handle_reply_err()
222         error_setg(errp, "Server requires INFO_BLOCK_SIZE for option %" PRIu32  in nbd_handle_reply_err()
223                    " (%s)", reply->option, nbd_opt_lookup(reply->option));  in nbd_handle_reply_err()
227         error_setg(errp, "Unknown error code when asking for option %" PRIu32  in nbd_handle_reply_err()
228                    " (%s)", reply->option, nbd_opt_lookup(reply->option));  in nbd_handle_reply_err()
271             error_setg(errp, "length too long for option end");  in nbd_receive_list()
285         error_setg(errp, "incorrect option length %" PRIu32, len);  in nbd_receive_list()
289     if (nbd_read32(ioc, &namelen, "option name length", errp) < 0) {  in nbd_receive_list()
333  * Send option for NBD_OPT_INFO or NBD_OPT_GO and parse the reply.
334  * Returns -1 if the option proves the export @info->name cannot be
335  * used, 0 if the option is unsupported (fall back to NBD_OPT_LIST and
556  * nbd_request_simple_option: Send an option request, and parse the reply.
581         error_setg(errp, "Server answered option %d (%s) with unexpected "  in nbd_request_simple_option()
589         error_setg(errp, "Option %d ('%s') response length is %" PRIu32  in nbd_request_simple_option()
628             error_setg(errp, "Server don't support STARTTLS option");  in nbd_receive_starttls()
712  *        0 if iteration is complete (including if option is unsupported),