include/uapi/linux/hyperv.h

   1 /*
   2  *
   3  * Copyright (c) 2011, Microsoft Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  16  * Place - Suite 330, Boston, MA 02111-1307 USA.
  17  *
  18  * Authors:
  19  *   Haiyang Zhang <haiyangz@microsoft.com>
  20  *   Hank Janssen  <hjanssen@microsoft.com>
  21  *   K. Y. Srinivasan <kys@microsoft.com>
  22  *
  23  */
  24
  25 #ifndef _UAPI_HYPERV_H
  26 #define _UAPI_HYPERV_H
  27
  28 #include <linux/uuid.h>
  29
  30 /*
  31  * Framework version for util services.
  32  */
  33 #define UTIL_FW_MINOR  0
  34
  35 #define UTIL_WS2K8_FW_MAJOR  1
  36 #define UTIL_WS2K8_FW_VERSION     (UTIL_WS2K8_FW_MAJOR << 16 | UTIL_FW_MINOR)
  37
  38 #define UTIL_FW_MAJOR  3
  39 #define UTIL_FW_VERSION     (UTIL_FW_MAJOR << 16 | UTIL_FW_MINOR)
  40
  41
  42 /*
  43  * Implementation of host controlled snapshot of the guest.
  44  */
  45
  46 #define VSS_OP_REGISTER 128
  47
  48 /*
  49   Daemon code with full handshake support.
  50  */
  51 #define VSS_OP_REGISTER1 129
  52
  53 enum hv_vss_op {
  54         VSS_OP_CREATE = 0,
  55         VSS_OP_DELETE,
  56         VSS_OP_HOT_BACKUP,
  57         VSS_OP_GET_DM_INFO,
  58         VSS_OP_BU_COMPLETE,
  59         /*
  60          * Following operations are only supported with IC version >= 5.0
  61          */
  62         VSS_OP_FREEZE, /* Freeze the file systems in the VM */
  63         VSS_OP_THAW, /* Unfreeze the file systems */
  64         VSS_OP_AUTO_RECOVER,
  65         VSS_OP_COUNT /* Number of operations, must be last */
  66 };
  67
  68
  69 /*
  70  * Header for all VSS messages.
  71  */
  72 struct hv_vss_hdr {
  73         __u8 operation;
  74         __u8 reserved[7];
  75 } __attribute__((packed));
  76
  77
  78 /*
  79  * Flag values for the hv_vss_check_feature. Linux supports only
  80  * one value.
  81  */
  82 #define VSS_HBU_NO_AUTO_RECOVERY        0x00000005
  83
  84 struct hv_vss_check_feature {
  85         __u32 flags;
  86 } __attribute__((packed));
  87
  88 struct hv_vss_check_dm_info {
  89         __u32 flags;
  90 } __attribute__((packed));
  91
  92 struct hv_vss_msg {
  93         union {
  94                 struct hv_vss_hdr vss_hdr;
  95                 int error;
  96         };
  97         union {
  98                 struct hv_vss_check_feature vss_cf;
  99                 struct hv_vss_check_dm_info dm_info;
 100         };
 101 } __attribute__((packed));
 102
 103 /*
 104  * Implementation of a host to guest copy facility.
 105  */
 106
 107 #define FCOPY_VERSION_0 0
 108 #define FCOPY_VERSION_1 1
 109 #define FCOPY_CURRENT_VERSION FCOPY_VERSION_1
 110 #define W_MAX_PATH 260
 111
 112 enum hv_fcopy_op {
 113         START_FILE_COPY = 0,
 114         WRITE_TO_FILE,
 115         COMPLETE_FCOPY,
 116         CANCEL_FCOPY,
 117 };
 118
 119 struct hv_fcopy_hdr {
 120         __u32 operation;
 121         uuid_le service_id0; /* currently unused */
 122         uuid_le service_id1; /* currently unused */
 123 } __attribute__((packed));
 124
 125 #define OVER_WRITE      0x1
 126 #define CREATE_PATH     0x2
 127
 128 struct hv_start_fcopy {
 129         struct hv_fcopy_hdr hdr;
 130         __u16 file_name[W_MAX_PATH];
 131         __u16 path_name[W_MAX_PATH];
 132         __u32 copy_flags;
 133         __u64 file_size;
 134 } __attribute__((packed));
 135
 136 /*
 137  * The file is chunked into fragments.
 138  */
 139 #define DATA_FRAGMENT   (6 * 1024)
 140
 141 struct hv_do_fcopy {
 142         struct hv_fcopy_hdr hdr;
 143         __u32   pad;
 144         __u64   offset;
 145         __u32   size;
 146         __u8    data[DATA_FRAGMENT];
 147 } __attribute__((packed));
 148
 149 /*
 150  * An implementation of HyperV key value pair (KVP) functionality for Linux.
 151  *
 152  *
 153  * Copyright (C) 2010, Novell, Inc.
 154  * Author : K. Y. Srinivasan <ksrinivasan@novell.com>
 155  *
 156  */
 157
 158 /*
 159  * Maximum value size - used for both key names and value data, and includes
 160  * any applicable NULL terminators.
 161  *
 162  * Note:  This limit is somewhat arbitrary, but falls easily within what is
 163  * supported for all native guests (back to Win 2000) and what is reasonable
 164  * for the IC KVP exchange functionality.  Note that Windows Me/98/95 are
 165  * limited to 255 character key names.
 166  *
 167  * MSDN recommends not storing data values larger than 2048 bytes in the
 168  * registry.
 169  *
 170  * Note:  This value is used in defining the KVP exchange message - this value
 171  * cannot be modified without affecting the message size and compatibility.
 172  */
 173
 174 /*
 175  * bytes, including any null terminators
 176  */
 177 #define HV_KVP_EXCHANGE_MAX_VALUE_SIZE          (2048)
 178
 179
 180 /*
 181  * Maximum key size - the registry limit for the length of an entry name
 182  * is 256 characters, including the null terminator
 183  */
 184
 185 #define HV_KVP_EXCHANGE_MAX_KEY_SIZE            (512)
 186
 187 /*
 188  * In Linux, we implement the KVP functionality in two components:
 189  * 1) The kernel component which is packaged as part of the hv_utils driver
 190  * is responsible for communicating with the host and responsible for
 191  * implementing the host/guest protocol. 2) A user level daemon that is
 192  * responsible for data gathering.
 193  *
 194  * Host/Guest Protocol: The host iterates over an index and expects the guest
 195  * to assign a key name to the index and also return the value corresponding to
 196  * the key. The host will have atmost one KVP transaction outstanding at any
 197  * given point in time. The host side iteration stops when the guest returns
 198  * an error. Microsoft has specified the following mapping of key names to
 199  * host specified index:
 200  *
 201  *      Index           Key Name
 202  *      0               FullyQualifiedDomainName
 203  *      1               IntegrationServicesVersion
 204  *      2               NetworkAddressIPv4
 205  *      3               NetworkAddressIPv6
 206  *      4               OSBuildNumber
 207  *      5               OSName
 208  *      6               OSMajorVersion
 209  *      7               OSMinorVersion
 210  *      8               OSVersion
 211  *      9               ProcessorArchitecture
 212  *
 213  * The Windows host expects the Key Name and Key Value to be encoded in utf16.
 214  *
 215  * Guest Kernel/KVP Daemon Protocol: As noted earlier, we implement all of the
 216  * data gathering functionality in a user mode daemon. The user level daemon
 217  * is also responsible for binding the key name to the index as well. The
 218  * kernel and user-level daemon communicate using a connector channel.
 219  *
 220  * The user mode component first registers with the
 221  * the kernel component. Subsequently, the kernel component requests, data
 222  * for the specified keys. In response to this message the user mode component
 223  * fills in the value corresponding to the specified key. We overload the
 224  * sequence field in the cn_msg header to define our KVP message types.
 225  *
 226  *
 227  * The kernel component simply acts as a conduit for communication between the
 228  * Windows host and the user-level daemon. The kernel component passes up the
 229  * index received from the Host to the user-level daemon. If the index is
 230  * valid (supported), the corresponding key as well as its
 231  * value (both are strings) is returned. If the index is invalid
 232  * (not supported), a NULL key string is returned.
 233  */
 234
 235
 236 /*
 237  * Registry value types.
 238  */
 239
 240 #define REG_SZ 1
 241 #define REG_U32 4
 242 #define REG_U64 8
 243
 244 /*
 245  * As we look at expanding the KVP functionality to include
 246  * IP injection functionality, we need to maintain binary
 247  * compatibility with older daemons.
 248  *
 249  * The KVP opcodes are defined by the host and it was unfortunate
 250  * that I chose to treat the registration operation as part of the
 251  * KVP operations defined by the host.
 252  * Here is the level of compatibility
 253  * (between the user level daemon and the kernel KVP driver) that we
 254  * will implement:
 255  *
 256  * An older daemon will always be supported on a newer driver.
 257  * A given user level daemon will require a minimal version of the
 258  * kernel driver.
 259  * If we cannot handle the version differences, we will fail gracefully
 260  * (this can happen when we have a user level daemon that is more
 261  * advanced than the KVP driver.
 262  *
 263  * We will use values used in this handshake for determining if we have
 264  * workable user level daemon and the kernel driver. We begin by taking the
 265  * registration opcode out of the KVP opcode namespace. We will however,
 266  * maintain compatibility with the existing user-level daemon code.
 267  */
 268
 269 /*
 270  * Daemon code not supporting IP injection (legacy daemon).
 271  */
 272
 273 #define KVP_OP_REGISTER 4
 274
 275 /*
 276  * Daemon code supporting IP injection.
 277  * The KVP opcode field is used to communicate the
 278  * registration information; so define a namespace that
 279  * will be distinct from the host defined KVP opcode.
 280  */
 281
 282 #define KVP_OP_REGISTER1 100
 283
 284 enum hv_kvp_exchg_op {
 285         KVP_OP_GET = 0,
 286         KVP_OP_SET,
 287         KVP_OP_DELETE,
 288         KVP_OP_ENUMERATE,
 289         KVP_OP_GET_IP_INFO,
 290         KVP_OP_SET_IP_INFO,
 291         KVP_OP_COUNT /* Number of operations, must be last. */
 292 };
 293
 294 enum hv_kvp_exchg_pool {
 295         KVP_POOL_EXTERNAL = 0,
 296         KVP_POOL_GUEST,
 297         KVP_POOL_AUTO,
 298         KVP_POOL_AUTO_EXTERNAL,
 299         KVP_POOL_AUTO_INTERNAL,
 300         KVP_POOL_COUNT /* Number of pools, must be last. */
 301 };
 302
 303 /*
 304  * Some Hyper-V status codes.
 305  */
 306
 307 #define HV_S_OK                         0x00000000
 308 #define HV_E_FAIL                       0x80004005
 309 #define HV_S_CONT                       0x80070103
 310 #define HV_ERROR_NOT_SUPPORTED          0x80070032
 311 #define HV_ERROR_MACHINE_LOCKED         0x800704F7
 312 #define HV_ERROR_DEVICE_NOT_CONNECTED   0x8007048F
 313 #define HV_INVALIDARG                   0x80070057
 314 #define HV_GUID_NOTFOUND                0x80041002
 315 #define HV_ERROR_ALREADY_EXISTS         0x80070050
 316 #define HV_ERROR_DISK_FULL              0x80070070
 317
 318 #define ADDR_FAMILY_NONE        0x00
 319 #define ADDR_FAMILY_IPV4        0x01
 320 #define ADDR_FAMILY_IPV6        0x02
 321
 322 #define MAX_ADAPTER_ID_SIZE     128
 323 #define MAX_IP_ADDR_SIZE        1024
 324 #define MAX_GATEWAY_SIZE        512
 325
 326
 327 struct hv_kvp_ipaddr_value {
 328         __u16   adapter_id[MAX_ADAPTER_ID_SIZE];
 329         __u8    addr_family;
 330         __u8    dhcp_enabled;
 331         __u16   ip_addr[MAX_IP_ADDR_SIZE];
 332         __u16   sub_net[MAX_IP_ADDR_SIZE];
 333         __u16   gate_way[MAX_GATEWAY_SIZE];
 334         __u16   dns_addr[MAX_IP_ADDR_SIZE];
 335 } __attribute__((packed));
 336
 337
 338 struct hv_kvp_hdr {
 339         __u8 operation;
 340         __u8 pool;
 341         __u16 pad;
 342 } __attribute__((packed));
 343
 344 struct hv_kvp_exchg_msg_value {
 345         __u32 value_type;
 346         __u32 key_size;
 347         __u32 value_size;
 348         __u8 key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
 349         union {
 350                 __u8 value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
 351                 __u32 value_u32;
 352                 __u64 value_u64;
 353         };
 354 } __attribute__((packed));
 355
 356 struct hv_kvp_msg_enumerate {
 357         __u32 index;
 358         struct hv_kvp_exchg_msg_value data;
 359 } __attribute__((packed));
 360
 361 struct hv_kvp_msg_get {
 362         struct hv_kvp_exchg_msg_value data;
 363 };
 364
 365 struct hv_kvp_msg_set {
 366         struct hv_kvp_exchg_msg_value data;
 367 };
 368
 369 struct hv_kvp_msg_delete {
 370         __u32 key_size;
 371         __u8 key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
 372 };
 373
 374 struct hv_kvp_register {
 375         __u8 version[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
 376 };
 377
 378 struct hv_kvp_msg {
 379         union {
 380                 struct hv_kvp_hdr       kvp_hdr;
 381                 int error;
 382         };
 383         union {
 384                 struct hv_kvp_msg_get           kvp_get;
 385                 struct hv_kvp_msg_set           kvp_set;
 386                 struct hv_kvp_msg_delete        kvp_delete;
 387                 struct hv_kvp_msg_enumerate     kvp_enum_data;
 388                 struct hv_kvp_ipaddr_value      kvp_ip_val;
 389                 struct hv_kvp_register          kvp_register;
 390         } body;
 391 } __attribute__((packed));
 392
 393 struct hv_kvp_ip_msg {
 394         __u8 operation;
 395         __u8 pool;
 396         struct hv_kvp_ipaddr_value      kvp_ip_val;
 397 } __attribute__((packed));
 398
 399 #endif /* _UAPI_HYPERV_H */