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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 _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 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)); 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 */