qemu/qga/commands-win32.c

287 lines
7.0 KiB
C

/*
* QEMU Guest Agent win32-specific command implementations
*
* Copyright IBM Corp. 2012
*
* Authors:
* Michael Roth <mdroth@linux.vnet.ibm.com>
* Gal Hammer <ghammer@redhat.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include <glib.h>
#include <wtypes.h>
#include <powrprof.h>
#include "qga/guest-agent-core.h"
#include "qga-qmp-commands.h"
#include "qerror.h"
#ifndef SHTDN_REASON_FLAG_PLANNED
#define SHTDN_REASON_FLAG_PLANNED 0x80000000
#endif
static void acquire_privilege(const char *name, Error **err)
{
HANDLE token;
TOKEN_PRIVILEGES priv;
Error *local_err = NULL;
if (error_is_set(err)) {
return;
}
if (OpenProcessToken(GetCurrentProcess(),
TOKEN_ADJUST_PRIVILEGES|TOKEN_QUERY, &token))
{
if (!LookupPrivilegeValue(NULL, name, &priv.Privileges[0].Luid)) {
error_set(&local_err, QERR_QGA_COMMAND_FAILED,
"no luid for requested privilege");
goto out;
}
priv.PrivilegeCount = 1;
priv.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
if (!AdjustTokenPrivileges(token, FALSE, &priv, 0, NULL, 0)) {
error_set(&local_err, QERR_QGA_COMMAND_FAILED,
"unable to acquire requested privilege");
goto out;
}
CloseHandle(token);
} else {
error_set(&local_err, QERR_QGA_COMMAND_FAILED,
"failed to open privilege token");
}
out:
if (local_err) {
error_propagate(err, local_err);
}
}
static void execute_async(DWORD WINAPI (*func)(LPVOID), LPVOID opaque, Error **err)
{
Error *local_err = NULL;
if (error_is_set(err)) {
return;
}
HANDLE thread = CreateThread(NULL, 0, func, opaque, 0, NULL);
if (!thread) {
error_set(&local_err, QERR_QGA_COMMAND_FAILED,
"failed to dispatch asynchronous command");
error_propagate(err, local_err);
}
}
void qmp_guest_shutdown(bool has_mode, const char *mode, Error **err)
{
UINT shutdown_flag = EWX_FORCE;
slog("guest-shutdown called, mode: %s", mode);
if (!has_mode || strcmp(mode, "powerdown") == 0) {
shutdown_flag |= EWX_POWEROFF;
} else if (strcmp(mode, "halt") == 0) {
shutdown_flag |= EWX_SHUTDOWN;
} else if (strcmp(mode, "reboot") == 0) {
shutdown_flag |= EWX_REBOOT;
} else {
error_set(err, QERR_INVALID_PARAMETER_VALUE, "mode",
"halt|powerdown|reboot");
return;
}
/* Request a shutdown privilege, but try to shut down the system
anyway. */
acquire_privilege(SE_SHUTDOWN_NAME, err);
if (error_is_set(err)) {
return;
}
if (!ExitWindowsEx(shutdown_flag, SHTDN_REASON_FLAG_PLANNED)) {
slog("guest-shutdown failed: %d", GetLastError());
error_set(err, QERR_UNDEFINED_ERROR);
}
}
int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode, Error **err)
{
error_set(err, QERR_UNSUPPORTED);
return 0;
}
void qmp_guest_file_close(int64_t handle, Error **err)
{
error_set(err, QERR_UNSUPPORTED);
}
GuestFileRead *qmp_guest_file_read(int64_t handle, bool has_count,
int64_t count, Error **err)
{
error_set(err, QERR_UNSUPPORTED);
return 0;
}
GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64,
bool has_count, int64_t count, Error **err)
{
error_set(err, QERR_UNSUPPORTED);
return 0;
}
GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset,
int64_t whence, Error **err)
{
error_set(err, QERR_UNSUPPORTED);
return 0;
}
void qmp_guest_file_flush(int64_t handle, Error **err)
{
error_set(err, QERR_UNSUPPORTED);
}
/*
* Return status of freeze/thaw
*/
GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **err)
{
error_set(err, QERR_UNSUPPORTED);
return 0;
}
/*
* Walk list of mounted file systems in the guest, and freeze the ones which
* are real local file systems.
*/
int64_t qmp_guest_fsfreeze_freeze(Error **err)
{
error_set(err, QERR_UNSUPPORTED);
return 0;
}
/*
* Walk list of frozen file systems in the guest, and thaw them.
*/
int64_t qmp_guest_fsfreeze_thaw(Error **err)
{
error_set(err, QERR_UNSUPPORTED);
return 0;
}
/*
* Walk list of mounted file systems in the guest, and discard unused
* areas.
*/
void qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **err)
{
error_set(err, QERR_UNSUPPORTED);
return;
}
typedef enum {
GUEST_SUSPEND_MODE_DISK,
GUEST_SUSPEND_MODE_RAM
} GuestSuspendMode;
static void check_suspend_mode(GuestSuspendMode mode, Error **err)
{
SYSTEM_POWER_CAPABILITIES sys_pwr_caps;
Error *local_err = NULL;
if (error_is_set(err)) {
return;
}
ZeroMemory(&sys_pwr_caps, sizeof(sys_pwr_caps));
if (!GetPwrCapabilities(&sys_pwr_caps)) {
error_set(&local_err, QERR_QGA_COMMAND_FAILED,
"failed to determine guest suspend capabilities");
goto out;
}
switch (mode) {
case GUEST_SUSPEND_MODE_DISK:
if (!sys_pwr_caps.SystemS4) {
error_set(&local_err, QERR_QGA_COMMAND_FAILED,
"suspend-to-disk not supported by OS");
}
break;
case GUEST_SUSPEND_MODE_RAM:
if (!sys_pwr_caps.SystemS3) {
error_set(&local_err, QERR_QGA_COMMAND_FAILED,
"suspend-to-ram not supported by OS");
}
break;
default:
error_set(&local_err, QERR_INVALID_PARAMETER_VALUE, "mode",
"GuestSuspendMode");
}
out:
if (local_err) {
error_propagate(err, local_err);
}
}
static DWORD WINAPI do_suspend(LPVOID opaque)
{
GuestSuspendMode *mode = opaque;
DWORD ret = 0;
if (!SetSuspendState(*mode == GUEST_SUSPEND_MODE_DISK, TRUE, TRUE)) {
slog("failed to suspend guest, %s", GetLastError());
ret = -1;
}
g_free(mode);
return ret;
}
void qmp_guest_suspend_disk(Error **err)
{
GuestSuspendMode *mode = g_malloc(sizeof(GuestSuspendMode));
*mode = GUEST_SUSPEND_MODE_DISK;
check_suspend_mode(*mode, err);
acquire_privilege(SE_SHUTDOWN_NAME, err);
execute_async(do_suspend, mode, err);
if (error_is_set(err)) {
g_free(mode);
}
}
void qmp_guest_suspend_ram(Error **err)
{
GuestSuspendMode *mode = g_malloc(sizeof(GuestSuspendMode));
*mode = GUEST_SUSPEND_MODE_RAM;
check_suspend_mode(*mode, err);
acquire_privilege(SE_SHUTDOWN_NAME, err);
execute_async(do_suspend, mode, err);
if (error_is_set(err)) {
g_free(mode);
}
}
void qmp_guest_suspend_hybrid(Error **err)
{
error_set(err, QERR_UNSUPPORTED);
}
GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **err)
{
error_set(err, QERR_UNSUPPORTED);
return NULL;
}
/* register init/cleanup routines for stateful command groups */
void ga_command_state_init(GAState *s, GACommandState *cs)
{
}