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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
*
* Copyright (c) 2011, Microsoft Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
* Place - Suite 330, Boston, MA 02111-1307 USA.
*
* Authors:
* Haiyang Zhang <haiyangz@microsoft.com>
* Hank Janssen <hjanssen@microsoft.com>
* K. Y. Srinivasan <kys@microsoft.com>
*
*/
#ifndef _HYPERV_H
#define _HYPERV_H
#include <linux/types.h>
/*
* Framework version for util services.
*/
#define UTIL_FW_MINOR 0
#define UTIL_WS2K8_FW_MAJOR 1
#define UTIL_WS2K8_FW_VERSION (UTIL_WS2K8_FW_MAJOR << 16 | UTIL_FW_MINOR)
#define UTIL_FW_MAJOR 3
#define UTIL_FW_VERSION (UTIL_FW_MAJOR << 16 | UTIL_FW_MINOR)
/*
* Implementation of host controlled snapshot of the guest.
*/
#define VSS_OP_REGISTER 128
/*
Daemon code with full handshake support.
*/
#define VSS_OP_REGISTER1 129
enum hv_vss_op {
VSS_OP_CREATE = 0,
VSS_OP_DELETE,
VSS_OP_HOT_BACKUP,
VSS_OP_GET_DM_INFO,
VSS_OP_BU_COMPLETE,
/*
* Following operations are only supported with IC version >= 5.0
*/
VSS_OP_FREEZE, /* Freeze the file systems in the VM */
VSS_OP_THAW, /* Unfreeze the file systems */
VSS_OP_AUTO_RECOVER,
VSS_OP_COUNT /* Number of operations, must be last */
};
/*
* Header for all VSS messages.
*/
struct hv_vss_hdr {
__u8 operation;
__u8 reserved[7];
} __attribute__((packed));
/*
* Flag values for the hv_vss_check_feature. Linux supports only
* one value.
*/
#define VSS_HBU_NO_AUTO_RECOVERY 0x00000005
struct hv_vss_check_feature {
__u32 flags;
} __attribute__((packed));
struct hv_vss_check_dm_info {
__u32 flags;
} __attribute__((packed));
/*
* struct hv_vss_msg encodes the fields that the Linux VSS
* driver accesses. However, FREEZE messages from Hyper-V contain
* additional LUN information that Linux doesn't use and are not
* represented in struct hv_vss_msg. A received FREEZE message may
* be as large as 6,260 bytes, so the driver must allocate at least
* that much space, not sizeof(struct hv_vss_msg). Other messages
* such as AUTO_RECOVER may be as large as 12,500 bytes. However,
* because the Linux VSS driver responds that it doesn't support
* auto-recovery, it should not receive such messages.
*/
struct hv_vss_msg {
union {
struct hv_vss_hdr vss_hdr;
int error;
};
union {
struct hv_vss_check_feature vss_cf;
struct hv_vss_check_dm_info dm_info;
};
} __attribute__((packed));
/*
* Implementation of a host to guest copy facility.
*/
#define FCOPY_VERSION_0 0
#define FCOPY_VERSION_1 1
#define FCOPY_CURRENT_VERSION FCOPY_VERSION_1
#define W_MAX_PATH 260
enum hv_fcopy_op {
START_FILE_COPY = 0,
WRITE_TO_FILE,
COMPLETE_FCOPY,
CANCEL_FCOPY,
};
struct hv_fcopy_hdr {
__u32 operation;
__u8 service_id0[16]; /* currently unused */
__u8 service_id1[16]; /* currently unused */
} __attribute__((packed));
#define OVER_WRITE 0x1
#define CREATE_PATH 0x2
struct hv_start_fcopy {
struct hv_fcopy_hdr hdr;
__u16 file_name[W_MAX_PATH];
__u16 path_name[W_MAX_PATH];
__u32 copy_flags;
__u64 file_size;
} __attribute__((packed));
/*
* The file is chunked into fragments.
*/
#define DATA_FRAGMENT (6 * 1024)
struct hv_do_fcopy {
struct hv_fcopy_hdr hdr;
__u32 pad;
__u64 offset;
__u32 size;
__u8 data[DATA_FRAGMENT];
} __attribute__((packed));
/*
* An implementation of HyperV key value pair (KVP) functionality for Linux.
*
*
* Copyright (C) 2010, Novell, Inc.
* Author : K. Y. Srinivasan <ksrinivasan@novell.com>
*
*/
/*
* Maximum value size - used for both key names and value data, and includes
* any applicable NULL terminators.
*
* Note: This limit is somewhat arbitrary, but falls easily within what is
* supported for all native guests (back to Win 2000) and what is reasonable
* for the IC KVP exchange functionality. Note that Windows Me/98/95 are
* limited to 255 character key names.
*
* MSDN recommends not storing data values larger than 2048 bytes in the
* registry.
*
* Note: This value is used in defining the KVP exchange message - this value
* cannot be modified without affecting the message size and compatibility.
*/
/*
* bytes, including any null terminators
*/
#define HV_KVP_EXCHANGE_MAX_VALUE_SIZE (2048)
/*
* Maximum key size - the registry limit for the length of an entry name
* is 256 characters, including the null terminator
*/
#define HV_KVP_EXCHANGE_MAX_KEY_SIZE (512)
/*
* In Linux, we implement the KVP functionality in two components:
* 1) The kernel component which is packaged as part of the hv_utils driver
* is responsible for communicating with the host and responsible for
* implementing the host/guest protocol. 2) A user level daemon that is
* responsible for data gathering.
*
* Host/Guest Protocol: The host iterates over an index and expects the guest
* to assign a key name to the index and also return the value corresponding to
* the key. The host will have atmost one KVP transaction outstanding at any
* given point in time. The host side iteration stops when the guest returns
* an error. Microsoft has specified the following mapping of key names to
* host specified index:
*
* Index Key Name
* 0 FullyQualifiedDomainName
* 1 IntegrationServicesVersion
* 2 NetworkAddressIPv4
* 3 NetworkAddressIPv6
* 4 OSBuildNumber
* 5 OSName
* 6 OSMajorVersion
* 7 OSMinorVersion
* 8 OSVersion
* 9 ProcessorArchitecture
*
* The Windows host expects the Key Name and Key Value to be encoded in utf16.
*
* Guest Kernel/KVP Daemon Protocol: As noted earlier, we implement all of the
* data gathering functionality in a user mode daemon. The user level daemon
* is also responsible for binding the key name to the index as well. The
* kernel and user-level daemon communicate using a connector channel.
*
* The user mode component first registers with the
* kernel component. Subsequently, the kernel component requests, data
* for the specified keys. In response to this message the user mode component
* fills in the value corresponding to the specified key. We overload the
* sequence field in the cn_msg header to define our KVP message types.
*
*
* The kernel component simply acts as a conduit for communication between the
* Windows host and the user-level daemon. The kernel component passes up the
* index received from the Host to the user-level daemon. If the index is
* valid (supported), the corresponding key as well as its
* value (both are strings) is returned. If the index is invalid
* (not supported), a NULL key string is returned.
*/
/*
* Registry value types.
*/
#define REG_SZ 1
#define REG_U32 4
#define REG_U64 8
/*
* As we look at expanding the KVP functionality to include
* IP injection functionality, we need to maintain binary
* compatibility with older daemons.
*
* The KVP opcodes are defined by the host and it was unfortunate
* that I chose to treat the registration operation as part of the
* KVP operations defined by the host.
* Here is the level of compatibility
* (between the user level daemon and the kernel KVP driver) that we
* will implement:
*
* An older daemon will always be supported on a newer driver.
* A given user level daemon will require a minimal version of the
* kernel driver.
* If we cannot handle the version differences, we will fail gracefully
* (this can happen when we have a user level daemon that is more
* advanced than the KVP driver.
*
* We will use values used in this handshake for determining if we have
* workable user level daemon and the kernel driver. We begin by taking the
* registration opcode out of the KVP opcode namespace. We will however,
* maintain compatibility with the existing user-level daemon code.
*/
/*
* Daemon code not supporting IP injection (legacy daemon).
*/
#define KVP_OP_REGISTER 4
/*
* Daemon code supporting IP injection.
* The KVP opcode field is used to communicate the
* registration information; so define a namespace that
* will be distinct from the host defined KVP opcode.
*/
#define KVP_OP_REGISTER1 100
enum hv_kvp_exchg_op {
KVP_OP_GET = 0,
KVP_OP_SET,
KVP_OP_DELETE,
KVP_OP_ENUMERATE,
KVP_OP_GET_IP_INFO,
KVP_OP_SET_IP_INFO,
KVP_OP_COUNT /* Number of operations, must be last. */
};
enum hv_kvp_exchg_pool {
KVP_POOL_EXTERNAL = 0,
KVP_POOL_GUEST,
KVP_POOL_AUTO,
KVP_POOL_AUTO_EXTERNAL,
KVP_POOL_AUTO_INTERNAL,
KVP_POOL_COUNT /* Number of pools, must be last. */
};
/*
* Some Hyper-V status codes.
*/
#define HV_S_OK 0x00000000
#define HV_E_FAIL 0x80004005
#define HV_S_CONT 0x80070103
#define HV_ERROR_NOT_SUPPORTED 0x80070032
#define HV_ERROR_MACHINE_LOCKED 0x800704F7
#define HV_ERROR_DEVICE_NOT_CONNECTED 0x8007048F
#define HV_INVALIDARG 0x80070057
#define HV_GUID_NOTFOUND 0x80041002
#define HV_ERROR_ALREADY_EXISTS 0x80070050
#define HV_ERROR_DISK_FULL 0x80070070
#define ADDR_FAMILY_NONE 0x00
#define ADDR_FAMILY_IPV4 0x01
#define ADDR_FAMILY_IPV6 0x02
#define MAX_ADAPTER_ID_SIZE 128
#define MAX_IP_ADDR_SIZE 1024
#define MAX_GATEWAY_SIZE 512
struct hv_kvp_ipaddr_value {
__u16 adapter_id[MAX_ADAPTER_ID_SIZE];
__u8 addr_family;
__u8 dhcp_enabled;
__u16 ip_addr[MAX_IP_ADDR_SIZE];
__u16 sub_net[MAX_IP_ADDR_SIZE];
__u16 gate_way[MAX_GATEWAY_SIZE];
__u16 dns_addr[MAX_IP_ADDR_SIZE];
} __attribute__((packed));
struct hv_kvp_hdr {
__u8 operation;
__u8 pool;
__u16 pad;
} __attribute__((packed));
struct hv_kvp_exchg_msg_value {
__u32 value_type;
__u32 key_size;
__u32 value_size;
__u8 key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
union {
__u8 value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
__u32 value_u32;
__u64 value_u64;
} __attribute__((packed));
} __attribute__((packed));
struct hv_kvp_msg_enumerate {
__u32 index;
struct hv_kvp_exchg_msg_value data;
} __attribute__((packed));
struct hv_kvp_msg_get {
struct hv_kvp_exchg_msg_value data;
};
struct hv_kvp_msg_set {
struct hv_kvp_exchg_msg_value data;
};
struct hv_kvp_msg_delete {
__u32 key_size;
__u8 key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
};
struct hv_kvp_register {
__u8 version[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
};
struct hv_kvp_msg {
union {
struct hv_kvp_hdr kvp_hdr;
int error;
};
union {
struct hv_kvp_msg_get kvp_get;
struct hv_kvp_msg_set kvp_set;
struct hv_kvp_msg_delete kvp_delete;
struct hv_kvp_msg_enumerate kvp_enum_data;
struct hv_kvp_ipaddr_value kvp_ip_val;
struct hv_kvp_register kvp_register;
} body;
} __attribute__((packed));
struct hv_kvp_ip_msg {
__u8 operation;
__u8 pool;
struct hv_kvp_ipaddr_value kvp_ip_val;
} __attribute__((packed));
#endif /* _HYPERV_H */