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+/*
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+ *
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+ * Copyright (c) 2011, Microsoft Corporation.
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+ *
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+ * This program is free software; you can redistribute it and/or modify it
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+ * under the terms and conditions of the GNU General Public License,
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+ * version 2, as published by the Free Software Foundation.
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+ *
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+ * This program is distributed in the hope it will be useful, but WITHOUT
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+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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+ * more details.
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+ *
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+ * You should have received a copy of the GNU General Public License along with
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+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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+ * Place - Suite 330, Boston, MA 02111-1307 USA.
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+ *
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+ * Authors:
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+ * Haiyang Zhang <haiyangz@microsoft.com>
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+ * Hank Janssen <hjanssen@microsoft.com>
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+ * K. Y. Srinivasan <kys@microsoft.com>
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+ *
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+ */
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+
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+#ifndef _UAPI_HYPERV_H
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+#define _UAPI_HYPERV_H
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+
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+/*
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+ * Framework version for util services.
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+ */
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+#define UTIL_FW_MINOR 0
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+
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+#define UTIL_WS2K8_FW_MAJOR 1
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+#define UTIL_WS2K8_FW_VERSION (UTIL_WS2K8_FW_MAJOR << 16 | UTIL_FW_MINOR)
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+
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+#define UTIL_FW_MAJOR 3
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+#define UTIL_FW_VERSION (UTIL_FW_MAJOR << 16 | UTIL_FW_MINOR)
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+
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+
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+/*
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+ * Implementation of host controlled snapshot of the guest.
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+ */
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+
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+#define VSS_OP_REGISTER 128
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+
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+enum hv_vss_op {
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+ VSS_OP_CREATE = 0,
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+ VSS_OP_DELETE,
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+ VSS_OP_HOT_BACKUP,
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+ VSS_OP_GET_DM_INFO,
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+ VSS_OP_BU_COMPLETE,
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+ /*
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+ * Following operations are only supported with IC version >= 5.0
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+ */
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+ VSS_OP_FREEZE, /* Freeze the file systems in the VM */
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+ VSS_OP_THAW, /* Unfreeze the file systems */
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+ VSS_OP_AUTO_RECOVER,
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+ VSS_OP_COUNT /* Number of operations, must be last */
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+};
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+
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+
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+/*
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+ * Header for all VSS messages.
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+ */
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+struct hv_vss_hdr {
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+ __u8 operation;
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+ __u8 reserved[7];
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+} __attribute__((packed));
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+
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+
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+/*
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+ * Flag values for the hv_vss_check_feature. Linux supports only
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+ * one value.
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+ */
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+#define VSS_HBU_NO_AUTO_RECOVERY 0x00000005
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+
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+struct hv_vss_check_feature {
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+ __u32 flags;
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+} __attribute__((packed));
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+
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+struct hv_vss_check_dm_info {
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+ __u32 flags;
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+} __attribute__((packed));
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+
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+struct hv_vss_msg {
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+ union {
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+ struct hv_vss_hdr vss_hdr;
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+ int error;
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+ };
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+ union {
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+ struct hv_vss_check_feature vss_cf;
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+ struct hv_vss_check_dm_info dm_info;
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+ };
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+} __attribute__((packed));
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+
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+/*
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+ * An implementation of HyperV key value pair (KVP) functionality for Linux.
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+ *
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+ *
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+ * Copyright (C) 2010, Novell, Inc.
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+ * Author : K. Y. Srinivasan <ksrinivasan@novell.com>
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+ *
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+ */
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+
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+/*
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+ * Maximum value size - used for both key names and value data, and includes
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+ * any applicable NULL terminators.
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+ *
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+ * Note: This limit is somewhat arbitrary, but falls easily within what is
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+ * supported for all native guests (back to Win 2000) and what is reasonable
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+ * for the IC KVP exchange functionality. Note that Windows Me/98/95 are
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+ * limited to 255 character key names.
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+ *
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+ * MSDN recommends not storing data values larger than 2048 bytes in the
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+ * registry.
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+ *
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+ * Note: This value is used in defining the KVP exchange message - this value
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+ * cannot be modified without affecting the message size and compatibility.
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+ */
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+
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+/*
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+ * bytes, including any null terminators
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+ */
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+#define HV_KVP_EXCHANGE_MAX_VALUE_SIZE (2048)
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+
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+
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+/*
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+ * Maximum key size - the registry limit for the length of an entry name
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+ * is 256 characters, including the null terminator
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+ */
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+
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+#define HV_KVP_EXCHANGE_MAX_KEY_SIZE (512)
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+
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+/*
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+ * In Linux, we implement the KVP functionality in two components:
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+ * 1) The kernel component which is packaged as part of the hv_utils driver
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+ * is responsible for communicating with the host and responsible for
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+ * implementing the host/guest protocol. 2) A user level daemon that is
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+ * responsible for data gathering.
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+ *
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+ * Host/Guest Protocol: The host iterates over an index and expects the guest
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+ * to assign a key name to the index and also return the value corresponding to
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+ * the key. The host will have atmost one KVP transaction outstanding at any
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+ * given point in time. The host side iteration stops when the guest returns
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+ * an error. Microsoft has specified the following mapping of key names to
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+ * host specified index:
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+ *
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+ * Index Key Name
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+ * 0 FullyQualifiedDomainName
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+ * 1 IntegrationServicesVersion
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+ * 2 NetworkAddressIPv4
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+ * 3 NetworkAddressIPv6
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+ * 4 OSBuildNumber
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+ * 5 OSName
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+ * 6 OSMajorVersion
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+ * 7 OSMinorVersion
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+ * 8 OSVersion
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+ * 9 ProcessorArchitecture
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+ *
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+ * The Windows host expects the Key Name and Key Value to be encoded in utf16.
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+ *
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+ * Guest Kernel/KVP Daemon Protocol: As noted earlier, we implement all of the
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+ * data gathering functionality in a user mode daemon. The user level daemon
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+ * is also responsible for binding the key name to the index as well. The
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+ * kernel and user-level daemon communicate using a connector channel.
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+ *
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+ * The user mode component first registers with the
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+ * the kernel component. Subsequently, the kernel component requests, data
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+ * for the specified keys. In response to this message the user mode component
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+ * fills in the value corresponding to the specified key. We overload the
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+ * sequence field in the cn_msg header to define our KVP message types.
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+ *
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+ *
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+ * The kernel component simply acts as a conduit for communication between the
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+ * Windows host and the user-level daemon. The kernel component passes up the
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+ * index received from the Host to the user-level daemon. If the index is
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+ * valid (supported), the corresponding key as well as its
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+ * value (both are strings) is returned. If the index is invalid
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+ * (not supported), a NULL key string is returned.
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+ */
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+
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+
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+/*
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+ * Registry value types.
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+ */
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+
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+#define REG_SZ 1
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+#define REG_U32 4
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+#define REG_U64 8
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+
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+/*
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+ * As we look at expanding the KVP functionality to include
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+ * IP injection functionality, we need to maintain binary
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+ * compatibility with older daemons.
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+ *
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+ * The KVP opcodes are defined by the host and it was unfortunate
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+ * that I chose to treat the registration operation as part of the
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+ * KVP operations defined by the host.
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+ * Here is the level of compatibility
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+ * (between the user level daemon and the kernel KVP driver) that we
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+ * will implement:
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+ *
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+ * An older daemon will always be supported on a newer driver.
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+ * A given user level daemon will require a minimal version of the
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+ * kernel driver.
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+ * If we cannot handle the version differences, we will fail gracefully
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+ * (this can happen when we have a user level daemon that is more
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+ * advanced than the KVP driver.
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+ *
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+ * We will use values used in this handshake for determining if we have
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+ * workable user level daemon and the kernel driver. We begin by taking the
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+ * registration opcode out of the KVP opcode namespace. We will however,
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+ * maintain compatibility with the existing user-level daemon code.
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+ */
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+
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+/*
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+ * Daemon code not supporting IP injection (legacy daemon).
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+ */
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+
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+#define KVP_OP_REGISTER 4
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+
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+/*
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+ * Daemon code supporting IP injection.
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+ * The KVP opcode field is used to communicate the
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+ * registration information; so define a namespace that
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+ * will be distinct from the host defined KVP opcode.
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+ */
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+
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+#define KVP_OP_REGISTER1 100
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+
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+enum hv_kvp_exchg_op {
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+ KVP_OP_GET = 0,
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+ KVP_OP_SET,
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+ KVP_OP_DELETE,
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+ KVP_OP_ENUMERATE,
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+ KVP_OP_GET_IP_INFO,
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+ KVP_OP_SET_IP_INFO,
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+ KVP_OP_COUNT /* Number of operations, must be last. */
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+};
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+
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+enum hv_kvp_exchg_pool {
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+ KVP_POOL_EXTERNAL = 0,
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+ KVP_POOL_GUEST,
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+ KVP_POOL_AUTO,
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+ KVP_POOL_AUTO_EXTERNAL,
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+ KVP_POOL_AUTO_INTERNAL,
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+ KVP_POOL_COUNT /* Number of pools, must be last. */
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+};
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+
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+/*
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+ * Some Hyper-V status codes.
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+ */
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+
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+#define HV_S_OK 0x00000000
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+#define HV_E_FAIL 0x80004005
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+#define HV_S_CONT 0x80070103
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+#define HV_ERROR_NOT_SUPPORTED 0x80070032
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+#define HV_ERROR_MACHINE_LOCKED 0x800704F7
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+#define HV_ERROR_DEVICE_NOT_CONNECTED 0x8007048F
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+#define HV_INVALIDARG 0x80070057
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+#define HV_GUID_NOTFOUND 0x80041002
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+
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+#define ADDR_FAMILY_NONE 0x00
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+#define ADDR_FAMILY_IPV4 0x01
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+#define ADDR_FAMILY_IPV6 0x02
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+
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+#define MAX_ADAPTER_ID_SIZE 128
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+#define MAX_IP_ADDR_SIZE 1024
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+#define MAX_GATEWAY_SIZE 512
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+
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+
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+struct hv_kvp_ipaddr_value {
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+ __u16 adapter_id[MAX_ADAPTER_ID_SIZE];
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+ __u8 addr_family;
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+ __u8 dhcp_enabled;
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+ __u16 ip_addr[MAX_IP_ADDR_SIZE];
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+ __u16 sub_net[MAX_IP_ADDR_SIZE];
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+ __u16 gate_way[MAX_GATEWAY_SIZE];
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+ __u16 dns_addr[MAX_IP_ADDR_SIZE];
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+} __attribute__((packed));
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+
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+
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+struct hv_kvp_hdr {
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+ __u8 operation;
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+ __u8 pool;
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+ __u16 pad;
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+} __attribute__((packed));
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+
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+struct hv_kvp_exchg_msg_value {
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+ __u32 value_type;
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+ __u32 key_size;
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+ __u32 value_size;
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+ __u8 key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
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+ union {
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+ __u8 value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
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+ __u32 value_u32;
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+ __u64 value_u64;
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+ };
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+} __attribute__((packed));
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+
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+struct hv_kvp_msg_enumerate {
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+ __u32 index;
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+ struct hv_kvp_exchg_msg_value data;
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+} __attribute__((packed));
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+
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+struct hv_kvp_msg_get {
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+ struct hv_kvp_exchg_msg_value data;
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+};
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+
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+struct hv_kvp_msg_set {
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+ struct hv_kvp_exchg_msg_value data;
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+};
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+
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+struct hv_kvp_msg_delete {
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+ __u32 key_size;
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+ __u8 key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
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+};
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+
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+struct hv_kvp_register {
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+ __u8 version[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
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+};
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+
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+struct hv_kvp_msg {
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+ union {
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+ struct hv_kvp_hdr kvp_hdr;
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+ int error;
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+ };
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+ union {
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+ struct hv_kvp_msg_get kvp_get;
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+ struct hv_kvp_msg_set kvp_set;
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+ struct hv_kvp_msg_delete kvp_delete;
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+ struct hv_kvp_msg_enumerate kvp_enum_data;
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+ struct hv_kvp_ipaddr_value kvp_ip_val;
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+ struct hv_kvp_register kvp_register;
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+ } body;
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+} __attribute__((packed));
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+
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+struct hv_kvp_ip_msg {
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+ __u8 operation;
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+ __u8 pool;
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+ struct hv_kvp_ipaddr_value kvp_ip_val;
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+} __attribute__((packed));
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+
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+#endif /* _UAPI_HYPERV_H */
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Bjarke Istrup Pedersen