static int nbd_handle_reply_err(uint32_t opt, uint32_t type, Error **errp) { if (!(type & (1 << 31))) { return 0; } switch (type) { case NBD_REP_ERR_UNSUP: error_setg(errp, "Unsupported option type %x", opt); break; case NBD_REP_ERR_POLICY: error_setg(errp, "Denied by server for option %x", opt); break; case NBD_REP_ERR_INVALID: error_setg(errp, "Invalid data length for option %x", opt); break; case NBD_REP_ERR_TLS_REQD: error_setg(errp, "TLS negotiation required before option %x", opt); break; default: error_setg(errp, "Unknown error code when asking for option %x", opt); break; } return -1; }