Re: [PATCH v2] Adding hyperv.h to uapi headers
From: Bjarke Istrup Pedersen
Date: Sun Jan 19 2014 - 05:15:04 EST
2014/1/19 KY Srinivasan <kys@xxxxxxxxxxxxx>:
>
>
>> -----Original Message-----
>> From: gurligebis@xxxxxxxxx [mailto:gurligebis@xxxxxxxxx] On Behalf Of Bjarke
>> Istrup Pedersen
>> Sent: Saturday, January 18, 2014 4:23 PM
>> To: Linux Kernel Mailing List
>> Cc: Haiyang Zhang; KY Srinivasan; Bjarke Istrup Pedersen
>> Subject: Re: [PATCH v2] Adding hyperv.h to uapi headers
>>
>> Could any of you Hyper-V developers take a look at this, and see if
>> this split makes sense to you?
>
> Have you compiled the hyper-v drivers with your change. I briefly looked at your
> latest patch but I did not see an include of the user level hyper-V driver in the kernel
> version of the header; or did I miss it. Please compile the drivers and the tools/hv/
> user level daemons to test your patch.
Hey,
I have compiled it, and both the drivers and the userspace deamons
builds fine :)
If you look at the patch, on line 134, it includes the uapi header.
Also, which parts of the uapi version header would you like me to move
to the kernel version? (I'll create a new patch then, with your
suggestions)
/Bjarke
> K. Y
>>
>> Thanks :)
>>
>> /Bjarke
>>
>> 2014/1/19 Bjarke Istrup Pedersen <gurligebis@xxxxxxxxxx>:
>> > This patch adds the hyperv.h header to the uapi folder, and adds it to the Kbuild
>> file.
>> > Doing this enables compiling userspace Hyper-V tools using the installed
>> headers.
>> >
>> > Version 2: Split UAPI parts into new header, instead of duplicating.
>> >
>> > Signed-off-by: Bjarke Istrup Pedersen <gurligebis@xxxxxxxxxx>
>> > ---
>> > include/linux/hyperv.h | 321 +----------------------------------------
>> > include/uapi/linux/Kbuild | 1 +
>> > include/uapi/linux/hyperv.h | 344
>> ++++++++++++++++++++++++++++++++++++++++++++
>> > 3 files changed, 347 insertions(+), 319 deletions(-)
>> > create mode 100644 include/uapi/linux/hyperv.h
>> >
>> > diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
>> > index 15da677..167ef47 100644
>> > --- a/include/linux/hyperv.h
>> > +++ b/include/linux/hyperv.h
>> > @@ -25,325 +25,9 @@
>> > #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
>> > -
>> > -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 {
>> > - 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));
>> > -
>> > -/*
>> > - * An implementation of HyperV key value pair (KVP) functionality for Linux.
>> > - *
>> > - *
>> > - * Copyright (C) 2010, Novell, Inc.
>> > - * Author : K. Y. Srinivasan <ksrinivasan@xxxxxxxxxx>
>> > - *
>> > - */
>> > -
>> > -/*
>> > - * 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)
>> > +#include <uapi/linux/hyperv.h>
>> >
>> > -/*
>> > - * 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
>> > - * 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 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));
>> > -
>> > -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));
>> > -
>> > -#ifdef __KERNEL__
>> > +#include <linux/types.h>
>> > #include <linux/scatterlist.h>
>> > #include <linux/list.h>
>> > #include <linux/uuid.h>
>> > @@ -1465,5 +1149,4 @@ void hv_vss_onchannelcallback(void *);
>> >
>> > extern __u32 vmbus_proto_version;
>> >
>> > -#endif /* __KERNEL__ */
>> > #endif /* _HYPERV_H */
>> > diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild
>> > index 33d2b8f..6389736 100644
>> > --- a/include/uapi/linux/Kbuild
>> > +++ b/include/uapi/linux/Kbuild
>> > @@ -139,6 +139,7 @@ header-y += hid.h
>> > header-y += hiddev.h
>> > header-y += hidraw.h
>> > header-y += hpet.h
>> > +header-y += hyperv.h
>> > header-y += hysdn_if.h
>> > header-y += i2c-dev.h
>> > header-y += i2c.h
>> > diff --git a/include/uapi/linux/hyperv.h b/include/uapi/linux/hyperv.h
>> > new file mode 100644
>> > index 0000000..1861f8e
>> > --- /dev/null
>> > +++ b/include/uapi/linux/hyperv.h
>> > @@ -0,0 +1,344 @@
>> > +/*
>> > + *
>> > + * 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@xxxxxxxxxxxxx>
>> > + * Hank Janssen <hjanssen@xxxxxxxxxxxxx>
>> > + * K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
>> > + *
>> > + */
>> > +
>> > +#ifndef _UAPI_HYPERV_H
>> > +#define _UAPI_HYPERV_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
>> > +
>> > +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 {
>> > + 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));
>> > +
>> > +/*
>> > + * An implementation of HyperV key value pair (KVP) functionality for Linux.
>> > + *
>> > + *
>> > + * Copyright (C) 2010, Novell, Inc.
>> > + * Author : K. Y. Srinivasan <ksrinivasan@xxxxxxxxxx>
>> > + *
>> > + */
>> > +
>> > +/*
>> > + * 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
>> > + * 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 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));
>> > +
>> > +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 */
>> > --
>> > 1.8.5.3
>> >
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