githubmirror/efivar

src/dp-message.c
729 строк20 KB
Peter Jones
Fix some allocation bounds checking gcc 7.x finds sometimes.
06 фев 2017, 22:24
06 фев 2017, 22:244ef24bb
/*
 * libefivar - library for the manipulation of EFI variables
 * Copyright 2012-2015 Red Hat, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of the
 * License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see
 * <http://www.gnu.org/licenses/>.
 *
 */

#include <arpa/inet.h>
#include <errno.h>
#include <inttypes.h>
#include <stddef.h>

#include <efivar.h>
#include "efivar_endian.h"
#include "dp.h"

static ssize_t
format_ipv6_port_helper(char *buf, size_t size,
			uint8_t const *ipaddr, uint16_t port)
{
	uint16_t *ip = (uint16_t *)ipaddr;
	ssize_t off = 0;

	format(buf, size, off, "IPv6", "[");

	// deciding how to print an ipv6 ip requires 2 passes, because
	// RFC5952 says we have to use :: a) only once and b) to maximum effect.
	int largest_zero_block_size = 0;
	int largest_zero_block_offset = -1;

	int this_zero_block_size = 0;
	int this_zero_block_offset = -1;

	int in_zero_block = 0;

	int i;
	for (i = 0; i < 8; i++) {
		if (ip[i] != 0 && in_zero_block) {
			if (this_zero_block_size > largest_zero_block_size) {
				largest_zero_block_size = this_zero_block_size;
				largest_zero_block_offset =
							this_zero_block_offset;
				this_zero_block_size = 0;
				this_zero_block_offset = -1;
				in_zero_block = 0;
			}
		}
		if (ip[i] == 0) {
			if (in_zero_block == 0) {
				in_zero_block = 1;
				this_zero_block_offset = i;
			}
			this_zero_block_size++;
		}
	}
	if (this_zero_block_size > largest_zero_block_size) {
		largest_zero_block_size = this_zero_block_size;
		largest_zero_block_offset = this_zero_block_offset;
		this_zero_block_size = 0;
		this_zero_block_offset = -1;
		in_zero_block = 0;
	}
	if (largest_zero_block_size == 1)
		largest_zero_block_offset = -1;

	for (i = 0; i < 8; i++) {
		if (largest_zero_block_offset == i) {
			format(buf, size, off, "IPv6", "::");
			i += largest_zero_block_size -1;
			continue;
		} else if (i > 0) {
			format(buf, size, off, "IPv6", ":");
		}

		format(buf, size, off, "IPv6", "%x", ip[i]);
	}

	format(buf, size, off, "IPv6", "]:%d", port);

	return off;
}

#define format_ipv6_port(buf, size, off, ipaddr, port)			\
	format_helper(format_ipv6_port_helper, buf, size, off, ipaddr, port)

static ssize_t
format_uart(char *buf, size_t size,
	    const char *dp_type __attribute__((__unused__)),
	    const_efidp dp)
{
	uint32_t value;
	ssize_t off = 0;
	char *labels[] = {"None", "Hardware", "XonXoff", ""};

	value = dp->uart_flow_control.flow_control_map;
	if (value > 2) {
		format(buf, size, off, "UartFlowControl",
			    "UartFlowControl(%d)", value);
		return off;
	}
	format(buf, size, off, "UartFlowControl", "UartFlowControl(%s)",
	       labels[value]);
	return off;
}

static ssize_t
format_sas(char *buf, size_t size,
	   const char *dp_type __attribute__((__unused__)),
	   const_efidp dp)
{
	ssize_t off = 0;
	const efidp_sas * const s = &dp->sas;

	int more_info = 0;
	int sassata = 0;
	int location = 0;
	int connect = 0;
	int drive_bay = -1;

	const char * const sassata_label[] = {"NoTopology", "SAS", "SATA"};
	const char * const location_label[] = {"Internal", "External" };
	const char * const connect_label[] = {"Direct", "Expanded" };

	more_info = s->device_topology_info & EFIDP_SAS_TOPOLOGY_MASK;

	if (more_info) {
		sassata = (s->device_topology_info & EFIDP_SAS_DEVICE_MASK)
			  >> EFIDP_SAS_DEVICE_SHIFT;
		if (sassata == EFIDP_SAS_DEVICE_SATA_EXTERNAL
				|| sassata == EFIDP_SAS_DEVICE_SAS_EXTERNAL)
			location = 1;

		if (sassata == EFIDP_SAS_DEVICE_SAS_INTERNAL
				|| sassata == EFIDP_SAS_DEVICE_SATA_INTERNAL)
			sassata = 1;
		else
			sassata = 2;

		connect = (s->device_topology_info & EFIDP_SAS_CONNECT_MASK)
			   >> EFIDP_SAS_CONNECT_SHIFT;
		if (more_info == EFIDP_SAS_TOPOLOGY_NEXTBYTE)
			drive_bay = s->drive_bay_id + 1;
	}

	format(buf, size, off, "SAS", "SAS(%"PRIx64",%"PRIx64",%"PRIx16",%s",
	       dp->subtype == EFIDP_MSG_SAS_EX ?
			be64_to_cpu(s->sas_address) :
			le64_to_cpu(s->sas_address),
		dp->subtype == EFIDP_MSG_SAS_EX ?
			be64_to_cpu(s->lun) :
			le64_to_cpu(s->lun),
		s->rtp, sassata_label[sassata]);

	if (more_info) {
		format(buf, size, off, "SAS", ",%s,%s",
		       location_label[location], connect_label[connect]);
	}

	if (more_info == 2 && drive_bay >= 0) {
		format(buf, size, off, "SAS", ",%d", drive_bay);
	}

	format(buf, size, off, "SAS", ")");
	return off;
}

#define class_helper(buf, size, off, label, dp)			\
	format(buf, size, off, label,				\
	       "%s(0x%"PRIx16",0x%"PRIx16",%d,%d)",		\
	       label,						\
	       dp->usb_class.vendor_id,				\
	       dp->usb_class.product_id,			\
	       dp->usb_class.device_subclass,			\
	       dp->usb_class.device_protocol)

static ssize_t
format_usb_class(char *buf, size_t size,
		 const char *dp_type __attribute__((__unused__)),
		 const_efidp dp)
{
	ssize_t off = 0;
	switch (dp->usb_class.device_class) {
	case EFIDP_USB_CLASS_AUDIO:
		class_helper(buf, size, off, "UsbAudio", dp);
		break;
	case EFIDP_USB_CLASS_CDC_CONTROL:
		class_helper(buf, size, off, "UsbCDCControl", dp);
		break;
	case EFIDP_USB_CLASS_HID:
		class_helper(buf, size, off, "UsbHID", dp);
		break;
	case EFIDP_USB_CLASS_IMAGE:
		class_helper(buf, size, off, "UsbImage", dp);
		break;
	case EFIDP_USB_CLASS_PRINTER:
		class_helper(buf, size, off, "UsbPrinter", dp);
		break;
	case EFIDP_USB_CLASS_MASS_STORAGE:
		class_helper(buf, size, off, "UsbMassStorage", dp);
		break;
	case EFIDP_USB_CLASS_HUB:
		class_helper(buf, size, off, "UsbHub", dp);
		break;
	case EFIDP_USB_CLASS_CDC_DATA:
		class_helper(buf, size, off, "UsbCDCData", dp);
		break;
	case EFIDP_USB_CLASS_SMARTCARD:
		class_helper(buf, size, off, "UsbSmartCard", dp);
		break;
	case EFIDP_USB_CLASS_VIDEO:
		class_helper(buf, size, off, "UsbVideo", dp);
		break;
	case EFIDP_USB_CLASS_DIAGNOSTIC:
		class_helper(buf, size, off, "UsbDiagnostic", dp);
		break;
	case EFIDP_USB_CLASS_WIRELESS:
		class_helper(buf, size, off, "UsbWireless", dp);
		break;
	case EFIDP_USB_CLASS_254:
		switch (dp->usb_class.device_subclass) {
		case EFIDP_USB_SUBCLASS_FW_UPDATE:
			format(buf, size, off, "UsbDeviceFirmwareUpdate",
			  "UsbDeviceFirmwareUpdate(0x%"PRIx16",0x%"PRIx16",%d)",
			  dp->usb_class.vendor_id,
			  dp->usb_class.product_id,
			  dp->usb_class.device_protocol);
			break;
		case EFIDP_USB_SUBCLASS_IRDA_BRIDGE:
			format(buf, size, off, "UsbIrdaBridge",
			       "UsbIrdaBridge(0x%"PRIx16",0x%"PRIx16",%d)",
			       dp->usb_class.vendor_id,
			       dp->usb_class.product_id,
			       dp->usb_class.device_protocol);
			break;
		case EFIDP_USB_SUBCLASS_TEST_AND_MEASURE:
			format(buf, size, off, "UsbTestAndMeasurement",
			  "UsbTestAndMeasurement(0x%"PRIx16",0x%"PRIx16",%d)",
			  dp->usb_class.vendor_id,
			  dp->usb_class.product_id,
			  dp->usb_class.device_protocol);
			break;
		}
		break;
	default:
		format(buf, size, off, "UsbClass",
		       "UsbClass(%"PRIx16",%"PRIx16",%d,%d)",
		       dp->usb_class.vendor_id,
		       dp->usb_class.product_id,
		       dp->usb_class.device_subclass,
		       dp->usb_class.device_protocol);
		break;
	}
	return off;
}

ssize_t
_format_message_dn(char *buf, size_t size, const_efidp dp)
{
	ssize_t off = 0;
	switch (dp->subtype) {
	case EFIDP_MSG_ATAPI:
		format(buf, size, off, "Ata", "Ata(%d,%d,%d)",
			      dp->atapi.primary, dp->atapi.slave,
			      dp->atapi.lun);
		break;
	case EFIDP_MSG_SCSI:
		format(buf, size, off, "SCSI", "SCSI(%d,%d)",
			      dp->scsi.target, dp->scsi.lun);
		break;
	case EFIDP_MSG_FIBRECHANNEL:
		format(buf, size, off, "Fibre", "Fibre(%"PRIx64",%"PRIx64")",
			      le64_to_cpu(dp->fc.wwn),
			      le64_to_cpu(dp->fc.lun));
		break;
	case EFIDP_MSG_FIBRECHANNELEX:
		format(buf, size, off, "Fibre", "Fibre(%"PRIx64",%"PRIx64")",
			      be64_to_cpu(dp->fc.wwn),
			      be64_to_cpu(dp->fc.lun));
		break;
	case EFIDP_MSG_1394:
		format(buf, size, off, "I1394", "I1394(0x%"PRIx64")",
			      dp->firewire.guid);
		break;
	case EFIDP_MSG_USB:
		format(buf, size, off, "USB", "USB(%d,%d)",
			      dp->usb.parent_port, dp->usb.interface);
		break;
	case EFIDP_MSG_I2O:
		format(buf, size, off, "I2O", "I2O(%d)", dp->i2o.target);
		break;
	case EFIDP_MSG_INFINIBAND:
		if (dp->infiniband.resource_flags &
				EFIDP_INFINIBAND_RESOURCE_IOC_SERVICE) {
			format(buf, size, off, "Infiniband",
	"Infiniband(%08x,%"PRIx64"%"PRIx64",%"PRIx64",%"PRIu64",%"PRIu64")",
				    dp->infiniband.resource_flags,
				    dp->infiniband.port_gid[1],
				    dp->infiniband.port_gid[0],
				    dp->infiniband.service_id,
				    dp->infiniband.target_port_id,
				    dp->infiniband.device_id);
		} else {
			format(buf, size, off, "Infiniband",
			       "Infiniband(%08x,%"PRIx64"%"PRIx64",",
			       dp->infiniband.resource_flags,
			       dp->infiniband.port_gid[1],
			       dp->infiniband.port_gid[0]);
			format_guid(buf, size, off, "Infiniband",
				    (efi_guid_t *)&dp->infiniband.ioc_guid);
			format(buf, size, off, "Infiniband",
			       ",%"PRIu64",%"PRIu64")",
			       dp->infiniband.target_port_id,
			       dp->infiniband.device_id);
		}
		break;
	case EFIDP_MSG_MAC_ADDR:
		format(buf, size, off, "MAC", "MAC(");
		format_hex(buf, size, off, "MAC", dp->mac_addr.mac_addr,
				  dp->mac_addr.if_type < 2 ? 6
					: sizeof(dp->mac_addr.mac_addr));
		format(buf, size, off, "MAC", ",%d)", dp->mac_addr.if_type);
		break;
	case EFIDP_MSG_IPv4: {
		efidp_ipv4_addr const *a = &dp->ipv4_addr;
		format(buf, size, off, "IPv4",
	"IPv4(%hhu.%hhu.%hhu.%hhu:%hu<->%hhu.%hhu.%hhu.%hhu:%hu,%hx,%hhx)",
			    a->local_ipv4_addr[0], a->local_ipv4_addr[1],
			    a->local_ipv4_addr[2], a->local_ipv4_addr[3],
			    a->local_port, a->remote_ipv4_addr[0],
			    a->remote_ipv4_addr[1], a->remote_ipv4_addr[2],
			    a->remote_ipv4_addr[3], a->remote_port,
			    a->protocol, a->static_ip_addr);
		break;
			     }
	case EFIDP_MSG_VENDOR: {
		struct {
			efi_guid_t guid;
			char label[40];
			ssize_t (*formatter)(char *buf, size_t size,
				const char *dp_type __attribute__((__unused__)),
				const_efidp dp);
		} subtypes[] = {
			{ .guid = EFIDP_PC_ANSI_GUID,
			  .label = "VenPcAnsi" },
			{ .guid = EFIDP_VT_100_GUID,
			  .label = "VenVt100" },
			{ .guid = EFIDP_VT_100_PLUS_GUID,
			  .label = "VenVt100Plus" },
			{ .guid = EFIDP_VT_UTF8_GUID,
			  .label = "VenUtf8" },
			{ .guid = EFIDP_MSG_DEBUGPORT_GUID,
			  .label = "DebugPort" },
			{ .guid = EFIDP_MSG_UART_GUID,
			  .label = "",
			  .formatter = format_uart },
			{ .guid = EFIDP_MSG_SAS_GUID,
			  .label = "",
			  .formatter = format_sas },
			{ .guid = efi_guid_empty,
			  .label = "" }
		};
		char *label = NULL;
		ssize_t (*formatter)(char *buf, size_t size,
			const char *dp_type __attribute__((__unused__)),
			const_efidp dp) = NULL;

		for (int i = 0; !efi_guid_is_zero(&subtypes[i].guid); i++) {
			if (efi_guid_cmp(&subtypes[i].guid,
					  &dp->msg_vendor.vendor_guid))
				continue;

			if (subtypes[i].label[0])
				label = subtypes[i].label;
			formatter = subtypes[i].formatter;
			break;
		}

		if (!label && !formatter) {
			format_vendor(buf, size, off, "VenMsg", dp);
			break;
		} else if (!label && formatter) {
			format_helper(formatter, buf, size, off, "VenMsg", dp);
			break;
		}

		format(buf, size, off, label, "%s(", label);
		if (efidp_node_size(dp) >
				(ssize_t)(sizeof (efidp_header)
					  + sizeof (efi_guid_t))) {
			format_hex(buf, size, off, label,
					  dp->msg_vendor.vendor_data,
					  efidp_node_size(dp)
						- sizeof (efidp_header)
						- sizeof (efi_guid_t));
		}
		format(buf, size, off, label, ")");
		break;
			       }
	case EFIDP_MSG_IPv6: {
		efidp_ipv6_addr const *a = &dp->ipv6_addr;
		char *addr0 = NULL;
		char *addr1 = NULL;
		ssize_t tmpoff = 0;
		ssize_t sz;

		sz = format_ipv6_port(addr0, 0, tmpoff, a->local_ipv6_addr,
				      a->local_port);
		if (sz < 0)
			return -1;
		addr0 = alloca(sz+1);
		tmpoff = 0;
		sz = format_ipv6_port(addr1, 0, tmpoff, a->remote_ipv6_addr,
				      a->remote_port);
		if (sz < 0)
			return -1;
		addr1 = alloca(sz+1);

		tmpoff = 0;
		format_ipv6_port(addr0, sz, tmpoff, a->local_ipv6_addr,
				      a->local_port);

		tmpoff = 0;
		format_ipv6_port(addr1, sz, tmpoff, a->remote_ipv6_addr,
				      a->remote_port);

		format(buf, size, off, "IPv6", "IPv6(%s<->%s,%hx,%hhx)",
			     addr0, addr1, a->protocol, a->ip_addr_origin);
		break;
			     }
	case EFIDP_MSG_UART: {
		int parity = dp->uart.parity;
		char parity_label[] = "DNEOMS";
		int stop_bits = dp->uart.stop_bits;
		char *sb_label[] = {"D", "1", "1.5", "2"};

		format(buf, size, off, "Uart", "Uart(%"PRIu64",%d,",
			    dp->uart.baud_rate ? dp->uart.baud_rate : 115200,
			    dp->uart.data_bits ? dp->uart.data_bits : 8);
		format(buf, size, off, "Uart",
			    parity > 5 ? "%d," : "%c,",
			    parity > 5 ? parity : parity_label[parity]);
		if (stop_bits > 3)
			format(buf, size, off, "Uart", "%d)", stop_bits);
		else
			format(buf, size, off, "Uart", "%s)",
			       sb_label[stop_bits]);
		break;
			     }
	case EFIDP_MSG_USB_CLASS:
		format_helper(format_usb_class, buf, size, off, "UsbClass", dp);
		break;
	case EFIDP_MSG_USB_WWID: {
		size_t limit = (efidp_node_size(dp)
				- offsetof(efidp_usb_wwid, serial_number))
				/ 2;
		format(buf, size, off, "UsbWwid",
			    "UsbWwid(%"PRIx16",%"PRIx16",%d,",
			    dp->usb_wwid.vendor_id, dp->usb_wwid.product_id,
			    dp->usb_wwid.interface);
		format_ucs2(buf, size, off, "UsbWwid",
			    dp->usb_wwid.serial_number, limit);
		format(buf, size, off, "UsbWwid", ")");
		break;
				 }
	case EFIDP_MSG_LUN:
		format(buf, size, off, "Unit", "Unit(%d)", dp->lun.lun);
		break;
	case EFIDP_MSG_SATA:
		format(buf, size, off, "Sata", "Sata(%d,%d,%d)",
			    dp->sata.hba_port, dp->sata.port_multiplier_port,
			    dp->sata.lun);
		break;
	case EFIDP_MSG_ISCSI: {
		ssize_t sz = efidp_node_size(dp)
			- offsetof(efidp_iscsi, target_name);
		if (sz < 0) {
			efi_error("bad DP node size");
			return -1;
		}

		if (sz > EFIDP_ISCSI_MAX_TARGET_NAME_LEN)
			sz = EFIDP_ISCSI_MAX_TARGET_NAME_LEN;

		char target_name[sz + 1];
		memcpy(target_name, dp->iscsi.target_name, sz);
		target_name[sz] = '\0';
		uint64_t lun;

		memcpy(&lun, dp->iscsi.lun, sizeof (lun));

		format(buf, size, off, "iSCSI",
			      "iSCSI(%s,%d,0x%"PRIx64",%s,%s,%s,%s)",
			      target_name, dp->iscsi.tpgt,
			      be64_to_cpu(lun),
			      (dp->iscsi.options >> EFIDP_ISCSI_HEADER_DIGEST_SHIFT) & EFIDP_ISCSI_HEADER_CRC32 ? "CRC32" : "None",
			      (dp->iscsi.options >> EFIDP_ISCSI_DATA_DIGEST_SHIFT) & EFIDP_ISCSI_DATA_CRC32 ? "CRC32" : "None",
			      (dp->iscsi.options >> EFIDP_ISCSI_AUTH_SHIFT) & EFIDP_ISCSI_AUTH_NONE ? "None" : \
				      (dp->iscsi.options >> EFIDP_ISCSI_CHAP_SHIFT) & EFIDP_ISCSI_CHAP_UNI ? "CHAP_UNI" : "CHAP_BI",
			      dp->iscsi.protocol == 0 ? "TCP" : "Unknown");
		break;
			      }
	case EFIDP_MSG_VLAN:
		format(buf, size, off, "Vlan", "Vlan(%d)", dp->vlan.vlan_id);
		break;
	case EFIDP_MSG_SAS_EX:
		format_sas(buf, size, NULL, dp);
		break;
	case EFIDP_MSG_NVME:
		format(buf, size, off, "NVMe", "NVMe(0x%"PRIx32","
			   "%02X-%02X-%02X-%02X-%02X-%02X-%02X-%02X)",
			   dp->nvme.namespace_id, dp->nvme.ieee_eui_64[0],
			   dp->nvme.ieee_eui_64[1], dp->nvme.ieee_eui_64[2],
			   dp->nvme.ieee_eui_64[3], dp->nvme.ieee_eui_64[4],
			   dp->nvme.ieee_eui_64[5], dp->nvme.ieee_eui_64[6],
			   dp->nvme.ieee_eui_64[7]);
		break;
	case EFIDP_MSG_URI: {
		ssize_t sz = efidp_node_size(dp) - offsetof(efidp_uri, uri);
		if (sz < 0) {
			efi_error("bad DP node size");
			return -1;
		}

		char uri[sz + 1];
		memcpy(uri, dp->uri.uri, sz);
		uri[sz] = '\0';
		format(buf, size, off, "Uri", "Uri(%s)", uri);
		break;
			    }
	case EFIDP_MSG_UFS:
		format(buf, size, off, "UFS", "UFS(%d,0x%02x)",
			    dp->ufs.target_id, dp->ufs.lun);
		break;
	case EFIDP_MSG_SD:
		format(buf, size, off, "SD", "SD(%d)", dp->sd.slot_number);
		break;
	default:
		format(buf, size, off, "Msg", "Msg(%d,", dp->subtype);
		format_hex(buf, size, off, "Msg", (uint8_t *)dp+4,
				efidp_node_size(dp)-4);
		format(buf, size, off, "Msg", ")");
		break;
	}
	return off;
}

ssize_t
__attribute__((__visibility__ ("default")))
efidp_make_mac_addr(uint8_t *buf, ssize_t size, uint8_t if_type,
		    const uint8_t * const mac_addr, ssize_t mac_addr_size)
{
	efidp_mac_addr *mac = (efidp_mac_addr *)buf;

	ssize_t sz = efidp_make_generic(buf, size, EFIDP_MESSAGE_TYPE,
					EFIDP_MSG_MAC_ADDR, sizeof (*mac));
	ssize_t req = sizeof (*mac);
	if (size && sz == req) {
		mac->if_type = if_type;
		memcpy(mac->mac_addr, mac_addr,
		       mac_addr_size > 32 ? 32 : mac_addr_size);
	}

	if (sz < 0)
		efi_error("efidp_make_generic failed");

	return sz;
}

ssize_t
__attribute__((__visibility__ ("default")))
efidp_make_ipv4(uint8_t *buf, ssize_t size, uint32_t local, uint32_t remote,
		uint32_t gateway, uint32_t netmask,
		uint16_t local_port, uint16_t remote_port,
		uint16_t protocol, int is_static)
{
	efidp_ipv4_addr *ipv4 = (efidp_ipv4_addr *)buf;
	ssize_t sz = efidp_make_generic(buf, size, EFIDP_MESSAGE_TYPE,
					EFIDP_MSG_IPv4, sizeof (*ipv4));
	ssize_t req = sizeof (*ipv4);
	if (size && sz == req) {
		*((char *)ipv4->local_ipv4_addr) = htonl(local);
		*((char *)ipv4->remote_ipv4_addr) = htonl(remote);
		ipv4->local_port = htons(local_port);
		ipv4->remote_port = htons(remote_port);
		ipv4->protocol = htons(protocol);
		ipv4->static_ip_addr = 0;
		if (is_static)
			ipv4->static_ip_addr = 1;
		*((char *)ipv4->gateway) = htonl(gateway);
		*((char *)ipv4->netmask) = htonl(netmask);
	}

	if (sz < 0)
		efi_error("efidp_make_generic failed");

	return sz;
}

ssize_t
__attribute__((__visibility__ ("default")))
efidp_make_scsi(uint8_t *buf, ssize_t size, uint16_t target, uint16_t lun)
{
	efidp_scsi *scsi = (efidp_scsi *)buf;
	ssize_t req = sizeof (*scsi);
	ssize_t sz = efidp_make_generic(buf, size, EFIDP_MESSAGE_TYPE,
					EFIDP_MSG_SCSI, sizeof (*scsi));
	if (size && sz == req) {
		scsi->target = target;
		scsi->lun = lun;
	}

	if (sz < 0)
		efi_error("efidp_make_generic failed");

	return sz;
}

ssize_t
__attribute__((__visibility__ ("default")))
efidp_make_nvme(uint8_t *buf, ssize_t size, uint32_t namespace_id,
		uint8_t *ieee_eui_64)
{
	efidp_nvme *nvme = (efidp_nvme *)buf;
	ssize_t req = sizeof (*nvme);
	ssize_t sz;

	sz = efidp_make_generic(buf, size, EFIDP_MESSAGE_TYPE,
					EFIDP_MSG_NVME, sizeof (*nvme));
	if (size && sz == req) {
		nvme->namespace_id = namespace_id;
		if (ieee_eui_64)
			memcpy(nvme->ieee_eui_64, ieee_eui_64,
			       sizeof (nvme->ieee_eui_64));
		else
			memset(nvme->ieee_eui_64, '\0',
			       sizeof (nvme->ieee_eui_64));
	}

	if (sz < 0)
		efi_error("efidp_make_generic failed");

	return sz;
}

ssize_t
__attribute__((__visibility__ ("default")))
efidp_make_sata(uint8_t *buf, ssize_t size, uint16_t hba_port,
		int16_t port_multiplier_port, uint16_t lun)
{
	efidp_sata *sata = (efidp_sata *)buf;
	ssize_t req = sizeof (*sata);
	ssize_t sz;

	sz = efidp_make_generic(buf, size, EFIDP_MESSAGE_TYPE,
					EFIDP_MSG_SATA, sizeof (*sata));
	if (size && sz == req) {
		sata->hba_port = hba_port;
		sata->port_multiplier_port = port_multiplier_port;
		sata->lun = lun;
	}

	if (sz < 0)
		efi_error("efidp_make_generic failed");

	return sz;
}

ssize_t
__attribute__((__visibility__ ("default")))
efidp_make_atapi(uint8_t *buf, ssize_t size, uint16_t primary,
		uint16_t slave, uint16_t lun)
{
	efidp_atapi *atapi = (efidp_atapi *)buf;
	ssize_t req = sizeof (*atapi);
	ssize_t sz;

	sz = efidp_make_generic(buf, size, EFIDP_MESSAGE_TYPE,
					EFIDP_MSG_ATAPI, sizeof (*atapi));
	if (size && sz == req) {
		atapi->primary = primary;
		atapi->slave = slave;
		atapi->lun = lun;
	}

	if (sz < 0)
		efi_error("efidp_make_generic failed");

	return sz;
}


ssize_t
__attribute__((__visibility__ ("default")))
efidp_make_sas(uint8_t *buf, ssize_t size, uint64_t sas_address)
{
	efidp_sas *sas = (efidp_sas *)buf;
	ssize_t req = sizeof (*sas);
	ssize_t sz;

	sz = efidp_make_generic(buf, size, EFIDP_MESSAGE_TYPE,
					EFIDP_MSG_VENDOR, sizeof (*sas));
	if (size && sz == req) {
		sas->vendor_guid = EFIDP_MSG_SAS_GUID;
		sas->reserved = 0;
		sas->sas_address = sas_address;
		sas->lun = 0;
		sas->device_topology_info = 0;
		sas->drive_bay_id = 0;
		sas->rtp = 0;
	}

	if (sz < 0)
		efi_error("efidp_make_generic failed");

	return sz;
}