qga/commands-win32.c

   1 /*
   2  * QEMU Guest Agent win32-specific command implementations
   3  *
   4  * Copyright IBM Corp. 2012
   5  *
   6  * Authors:
   7  *  Michael Roth      <mdroth@linux.vnet.ibm.com>
   8  *  Gal Hammer        <ghammer@redhat.com>
   9  *
  10  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  11  * See the COPYING file in the top-level directory.
  12  */
  13
  14 #include <glib.h>
  15 #include <wtypes.h>
  16 #include <powrprof.h>
  17 #include "qga/guest-agent-core.h"
  18 #include "qga-qmp-commands.h"
  19 #include "qapi/qmp/qerror.h"
  20
  21 #ifndef SHTDN_REASON_FLAG_PLANNED
  22 #define SHTDN_REASON_FLAG_PLANNED 0x80000000
  23 #endif
  24
  25 /* multiple of 100 nanoseconds elapsed between windows baseline
  26  *    (1/1/1601) and Unix Epoch (1/1/1970), accounting for leap years */
  27 #define W32_FT_OFFSET (10000000ULL * 60 * 60 * 24 * \
  28                        (365 * (1970 - 1601) +       \
  29                         (1970 - 1601) / 4 - 3))
  30
  31 static void acquire_privilege(const char *name, Error **err)
  32 {
  33     HANDLE token;
  34     TOKEN_PRIVILEGES priv;
  35     Error *local_err = NULL;
  36
  37     if (error_is_set(err)) {
  38         return;
  39     }
  40
  41     if (OpenProcessToken(GetCurrentProcess(),
  42         TOKEN_ADJUST_PRIVILEGES|TOKEN_QUERY, &token))
  43     {
  44         if (!LookupPrivilegeValue(NULL, name, &priv.Privileges[0].Luid)) {
  45             error_set(&local_err, QERR_QGA_COMMAND_FAILED,
  46                       "no luid for requested privilege");
  47             goto out;
  48         }
  49
  50         priv.PrivilegeCount = 1;
  51         priv.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
  52
  53         if (!AdjustTokenPrivileges(token, FALSE, &priv, 0, NULL, 0)) {
  54             error_set(&local_err, QERR_QGA_COMMAND_FAILED,
  55                       "unable to acquire requested privilege");
  56             goto out;
  57         }
  58
  59         CloseHandle(token);
  60     } else {
  61         error_set(&local_err, QERR_QGA_COMMAND_FAILED,
  62                   "failed to open privilege token");
  63     }
  64
  65 out:
  66     if (local_err) {
  67         error_propagate(err, local_err);
  68     }
  69 }
  70
  71 static void execute_async(DWORD WINAPI (*func)(LPVOID), LPVOID opaque, Error **err)
  72 {
  73     Error *local_err = NULL;
  74
  75     if (error_is_set(err)) {
  76         return;
  77     }
  78     HANDLE thread = CreateThread(NULL, 0, func, opaque, 0, NULL);
  79     if (!thread) {
  80         error_set(&local_err, QERR_QGA_COMMAND_FAILED,
  81                   "failed to dispatch asynchronous command");
  82         error_propagate(err, local_err);
  83     }
  84 }
  85
  86 void qmp_guest_shutdown(bool has_mode, const char *mode, Error **err)
  87 {
  88     UINT shutdown_flag = EWX_FORCE;
  89
  90     slog("guest-shutdown called, mode: %s", mode);
  91
  92     if (!has_mode || strcmp(mode, "powerdown") == 0) {
  93         shutdown_flag |= EWX_POWEROFF;
  94     } else if (strcmp(mode, "halt") == 0) {
  95         shutdown_flag |= EWX_SHUTDOWN;
  96     } else if (strcmp(mode, "reboot") == 0) {
  97         shutdown_flag |= EWX_REBOOT;
  98     } else {
  99         error_set(err, QERR_INVALID_PARAMETER_VALUE, "mode",
 100                   "halt|powerdown|reboot");
 101         return;
 102     }
 103
 104     /* Request a shutdown privilege, but try to shut down the system
 105        anyway. */
 106     acquire_privilege(SE_SHUTDOWN_NAME, err);
 107     if (error_is_set(err)) {
 108         return;
 109     }
 110
 111     if (!ExitWindowsEx(shutdown_flag, SHTDN_REASON_FLAG_PLANNED)) {
 112         slog("guest-shutdown failed: %d", GetLastError());
 113         error_set(err, QERR_UNDEFINED_ERROR);
 114     }
 115 }
 116
 117 int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode, Error **err)
 118 {
 119     error_set(err, QERR_UNSUPPORTED);
 120     return 0;
 121 }
 122
 123 void qmp_guest_file_close(int64_t handle, Error **err)
 124 {
 125     error_set(err, QERR_UNSUPPORTED);
 126 }
 127
 128 GuestFileRead *qmp_guest_file_read(int64_t handle, bool has_count,
 129                                    int64_t count, Error **err)
 130 {
 131     error_set(err, QERR_UNSUPPORTED);
 132     return 0;
 133 }
 134
 135 GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64,
 136                                      bool has_count, int64_t count, Error **err)
 137 {
 138     error_set(err, QERR_UNSUPPORTED);
 139     return 0;
 140 }
 141
 142 GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset,
 143                                    int64_t whence, Error **err)
 144 {
 145     error_set(err, QERR_UNSUPPORTED);
 146     return 0;
 147 }
 148
 149 void qmp_guest_file_flush(int64_t handle, Error **err)
 150 {
 151     error_set(err, QERR_UNSUPPORTED);
 152 }
 153
 154 /*
 155  * Return status of freeze/thaw
 156  */
 157 GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **err)
 158 {
 159     error_set(err, QERR_UNSUPPORTED);
 160     return 0;
 161 }
 162
 163 /*
 164  * Walk list of mounted file systems in the guest, and freeze the ones which
 165  * are real local file systems.
 166  */
 167 int64_t qmp_guest_fsfreeze_freeze(Error **err)
 168 {
 169     error_set(err, QERR_UNSUPPORTED);
 170     return 0;
 171 }
 172
 173 /*
 174  * Walk list of frozen file systems in the guest, and thaw them.
 175  */
 176 int64_t qmp_guest_fsfreeze_thaw(Error **err)
 177 {
 178     error_set(err, QERR_UNSUPPORTED);
 179     return 0;
 180 }
 181
 182 /*
 183  * Walk list of mounted file systems in the guest, and discard unused
 184  * areas.
 185  */
 186 void qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **err)
 187 {
 188     error_set(err, QERR_UNSUPPORTED);
 189 }
 190
 191 typedef enum {
 192     GUEST_SUSPEND_MODE_DISK,
 193     GUEST_SUSPEND_MODE_RAM
 194 } GuestSuspendMode;
 195
 196 static void check_suspend_mode(GuestSuspendMode mode, Error **err)
 197 {
 198     SYSTEM_POWER_CAPABILITIES sys_pwr_caps;
 199     Error *local_err = NULL;
 200
 201     if (error_is_set(err)) {
 202         return;
 203     }
 204     ZeroMemory(&sys_pwr_caps, sizeof(sys_pwr_caps));
 205     if (!GetPwrCapabilities(&sys_pwr_caps)) {
 206         error_set(&local_err, QERR_QGA_COMMAND_FAILED,
 207                   "failed to determine guest suspend capabilities");
 208         goto out;
 209     }
 210
 211     switch (mode) {
 212     case GUEST_SUSPEND_MODE_DISK:
 213         if (!sys_pwr_caps.SystemS4) {
 214             error_set(&local_err, QERR_QGA_COMMAND_FAILED,
 215                       "suspend-to-disk not supported by OS");
 216         }
 217         break;
 218     case GUEST_SUSPEND_MODE_RAM:
 219         if (!sys_pwr_caps.SystemS3) {
 220             error_set(&local_err, QERR_QGA_COMMAND_FAILED,
 221                       "suspend-to-ram not supported by OS");
 222         }
 223         break;
 224     default:
 225         error_set(&local_err, QERR_INVALID_PARAMETER_VALUE, "mode",
 226                   "GuestSuspendMode");
 227     }
 228
 229 out:
 230     if (local_err) {
 231         error_propagate(err, local_err);
 232     }
 233 }
 234
 235 static DWORD WINAPI do_suspend(LPVOID opaque)
 236 {
 237     GuestSuspendMode *mode = opaque;
 238     DWORD ret = 0;
 239
 240     if (!SetSuspendState(*mode == GUEST_SUSPEND_MODE_DISK, TRUE, TRUE)) {
 241         slog("failed to suspend guest, %s", GetLastError());
 242         ret = -1;
 243     }
 244     g_free(mode);
 245     return ret;
 246 }
 247
 248 void qmp_guest_suspend_disk(Error **err)
 249 {
 250     GuestSuspendMode *mode = g_malloc(sizeof(GuestSuspendMode));
 251
 252     *mode = GUEST_SUSPEND_MODE_DISK;
 253     check_suspend_mode(*mode, err);
 254     acquire_privilege(SE_SHUTDOWN_NAME, err);
 255     execute_async(do_suspend, mode, err);
 256
 257     if (error_is_set(err)) {
 258         g_free(mode);
 259     }
 260 }
 261
 262 void qmp_guest_suspend_ram(Error **err)
 263 {
 264     GuestSuspendMode *mode = g_malloc(sizeof(GuestSuspendMode));
 265
 266     *mode = GUEST_SUSPEND_MODE_RAM;
 267     check_suspend_mode(*mode, err);
 268     acquire_privilege(SE_SHUTDOWN_NAME, err);
 269     execute_async(do_suspend, mode, err);
 270
 271     if (error_is_set(err)) {
 272         g_free(mode);
 273     }
 274 }
 275
 276 void qmp_guest_suspend_hybrid(Error **err)
 277 {
 278     error_set(err, QERR_UNSUPPORTED);
 279 }
 280
 281 GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **err)
 282 {
 283     error_set(err, QERR_UNSUPPORTED);
 284     return NULL;
 285 }
 286
 287 int64_t qmp_guest_get_time(Error **errp)
 288 {
 289     SYSTEMTIME ts = {0};
 290     int64_t time_ns;
 291     FILETIME tf;
 292
 293     GetSystemTime(&ts);
 294     if (ts.wYear < 1601 || ts.wYear > 30827) {
 295         error_setg(errp, "Failed to get time");
 296         return -1;
 297     }
 298
 299     if (!SystemTimeToFileTime(&ts, &tf)) {
 300         error_setg(errp, "Failed to convert system time: %d", (int)GetLastError());
 301         return -1;
 302     }
 303
 304     time_ns = ((((int64_t)tf.dwHighDateTime << 32) | tf.dwLowDateTime)
 305                 - W32_FT_OFFSET) * 100;
 306
 307     return time_ns;
 308 }
 309
 310 void qmp_guest_set_time(int64_t time_ns, Error **errp)
 311 {
 312     SYSTEMTIME ts;
 313     FILETIME tf;
 314     LONGLONG time;
 315
 316     if (time_ns < 0 || time_ns / 100 > INT64_MAX - W32_FT_OFFSET) {
 317         error_setg(errp, "Time %" PRId64 "is invalid", time_ns);
 318         return;
 319     }
 320
 321     time = time_ns / 100 + W32_FT_OFFSET;
 322
 323     tf.dwLowDateTime = (DWORD) time;
 324     tf.dwHighDateTime = (DWORD) (time >> 32);
 325
 326     if (!FileTimeToSystemTime(&tf, &ts)) {
 327         error_setg(errp, "Failed to convert system time %d", (int)GetLastError());
 328         return;
 329     }
 330
 331     acquire_privilege(SE_SYSTEMTIME_NAME, errp);
 332     if (error_is_set(errp)) {
 333         return;
 334     }
 335
 336     if (!SetSystemTime(&ts)) {
 337         error_setg(errp, "Failed to set time to guest: %d", (int)GetLastError());
 338         return;
 339     }
 340 }
 341
 342 GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp)
 343 {
 344     error_set(errp, QERR_UNSUPPORTED);
 345     return NULL;
 346 }
 347
 348 int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp)
 349 {
 350     error_set(errp, QERR_UNSUPPORTED);
 351     return -1;
 352 }
 353
 354 /* register init/cleanup routines for stateful command groups */
 355 void ga_command_state_init(GAState *s, GACommandState *cs)
 356 {
 357 }