Quelle hyperv.h
Sprache: C
/* 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 _UAPI_HYPERV_H
#define _UAPI_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 0 x00000005
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 0 x1
#define CREATE_PATH 0 x2
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 0 x00000000
#define HV_E_FAIL 0 x80004005
#define HV_S_CONT 0 x80070103
#define HV_ERROR_NOT_SUPPORTED 0 x80070032
#define HV_ERROR_MACHINE_LOCKED 0 x800704F7
#define HV_ERROR_DEVICE_NOT_CONNECTED 0 x8007048F
#define HV_INVALIDARG 0 x80070057
#define HV_GUID_NOTFOUND 0 x80041002
#define HV_ERROR_ALREADY_EXISTS 0 x80070050
#define HV_ERROR_DISK_FULL 0 x80070070
#define ADDR_FAMILY_NONE 0 x00
#define ADDR_FAMILY_IPV4 0 x01
#define ADDR_FAMILY_IPV6 0 x02
#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));
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 /* _UAPI_HYPERV_H */
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2026-10-10
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