mirror of
https://github.com/qemu/qemu.git
synced 2024-12-06 02:03:38 +08:00
1281c08a46
Currently management softwares cannot know whether a qemu-ga command is supported or not on the running platform until they actually execute it. This patch disables unsupported commands at launch time of qemu-ga, so that management softwares can check whether they are supported from 'enabled' property of the result from 'guest-info' command. Signed-off-by: Tomoki Sekiyama <tomoki.sekiyama@hds.com> Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
486 lines
12 KiB
C
486 lines
12 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/vss-win32.h"
|
|
#include "qga-qmp-commands.h"
|
|
#include "qapi/qmp/qerror.h"
|
|
|
|
#ifndef SHTDN_REASON_FLAG_PLANNED
|
|
#define SHTDN_REASON_FLAG_PLANNED 0x80000000
|
|
#endif
|
|
|
|
/* multiple of 100 nanoseconds elapsed between windows baseline
|
|
* (1/1/1601) and Unix Epoch (1/1/1970), accounting for leap years */
|
|
#define W32_FT_OFFSET (10000000ULL * 60 * 60 * 24 * \
|
|
(365 * (1970 - 1601) + \
|
|
(1970 - 1601) / 4 - 3))
|
|
|
|
static void acquire_privilege(const char *name, Error **errp)
|
|
{
|
|
HANDLE token = NULL;
|
|
TOKEN_PRIVILEGES priv;
|
|
Error *local_err = NULL;
|
|
|
|
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;
|
|
}
|
|
|
|
} else {
|
|
error_set(&local_err, QERR_QGA_COMMAND_FAILED,
|
|
"failed to open privilege token");
|
|
}
|
|
|
|
out:
|
|
if (token) {
|
|
CloseHandle(token);
|
|
}
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
}
|
|
}
|
|
|
|
static void execute_async(DWORD WINAPI (*func)(LPVOID), LPVOID opaque,
|
|
Error **errp)
|
|
{
|
|
Error *local_err = NULL;
|
|
|
|
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(errp, local_err);
|
|
}
|
|
}
|
|
|
|
void qmp_guest_shutdown(bool has_mode, const char *mode, Error **errp)
|
|
{
|
|
Error *local_err = NULL;
|
|
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(errp, 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, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
|
|
if (!ExitWindowsEx(shutdown_flag, SHTDN_REASON_FLAG_PLANNED)) {
|
|
slog("guest-shutdown failed: %lu", GetLastError());
|
|
error_set(errp, QERR_UNDEFINED_ERROR);
|
|
}
|
|
}
|
|
|
|
int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode,
|
|
Error **errp)
|
|
{
|
|
error_set(errp, QERR_UNSUPPORTED);
|
|
return 0;
|
|
}
|
|
|
|
void qmp_guest_file_close(int64_t handle, Error **errp)
|
|
{
|
|
error_set(errp, QERR_UNSUPPORTED);
|
|
}
|
|
|
|
GuestFileRead *qmp_guest_file_read(int64_t handle, bool has_count,
|
|
int64_t count, Error **errp)
|
|
{
|
|
error_set(errp, QERR_UNSUPPORTED);
|
|
return 0;
|
|
}
|
|
|
|
GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64,
|
|
bool has_count, int64_t count,
|
|
Error **errp)
|
|
{
|
|
error_set(errp, QERR_UNSUPPORTED);
|
|
return 0;
|
|
}
|
|
|
|
GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset,
|
|
int64_t whence, Error **errp)
|
|
{
|
|
error_set(errp, QERR_UNSUPPORTED);
|
|
return 0;
|
|
}
|
|
|
|
void qmp_guest_file_flush(int64_t handle, Error **errp)
|
|
{
|
|
error_set(errp, QERR_UNSUPPORTED);
|
|
}
|
|
|
|
GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp)
|
|
{
|
|
error_set(errp, QERR_UNSUPPORTED);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Return status of freeze/thaw
|
|
*/
|
|
GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp)
|
|
{
|
|
if (!vss_initialized()) {
|
|
error_set(errp, QERR_UNSUPPORTED);
|
|
return 0;
|
|
}
|
|
|
|
if (ga_is_frozen(ga_state)) {
|
|
return GUEST_FSFREEZE_STATUS_FROZEN;
|
|
}
|
|
|
|
return GUEST_FSFREEZE_STATUS_THAWED;
|
|
}
|
|
|
|
/*
|
|
* Freeze local file systems using Volume Shadow-copy Service.
|
|
* The frozen state is limited for up to 10 seconds by VSS.
|
|
*/
|
|
int64_t qmp_guest_fsfreeze_freeze(Error **errp)
|
|
{
|
|
int i;
|
|
Error *local_err = NULL;
|
|
|
|
if (!vss_initialized()) {
|
|
error_set(errp, QERR_UNSUPPORTED);
|
|
return 0;
|
|
}
|
|
|
|
slog("guest-fsfreeze called");
|
|
|
|
/* cannot risk guest agent blocking itself on a write in this state */
|
|
ga_set_frozen(ga_state);
|
|
|
|
qga_vss_fsfreeze(&i, &local_err, true);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
goto error;
|
|
}
|
|
|
|
return i;
|
|
|
|
error:
|
|
local_err = NULL;
|
|
qmp_guest_fsfreeze_thaw(&local_err);
|
|
if (local_err) {
|
|
g_debug("cleanup thaw: %s", error_get_pretty(local_err));
|
|
error_free(local_err);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints,
|
|
strList *mountpoints,
|
|
Error **errp)
|
|
{
|
|
error_set(errp, QERR_UNSUPPORTED);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Thaw local file systems using Volume Shadow-copy Service.
|
|
*/
|
|
int64_t qmp_guest_fsfreeze_thaw(Error **errp)
|
|
{
|
|
int i;
|
|
|
|
if (!vss_initialized()) {
|
|
error_set(errp, QERR_UNSUPPORTED);
|
|
return 0;
|
|
}
|
|
|
|
qga_vss_fsfreeze(&i, errp, false);
|
|
|
|
ga_unset_frozen(ga_state);
|
|
return i;
|
|
}
|
|
|
|
static void guest_fsfreeze_cleanup(void)
|
|
{
|
|
Error *err = NULL;
|
|
|
|
if (!vss_initialized()) {
|
|
return;
|
|
}
|
|
|
|
if (ga_is_frozen(ga_state) == GUEST_FSFREEZE_STATUS_FROZEN) {
|
|
qmp_guest_fsfreeze_thaw(&err);
|
|
if (err) {
|
|
slog("failed to clean up frozen filesystems: %s",
|
|
error_get_pretty(err));
|
|
error_free(err);
|
|
}
|
|
}
|
|
|
|
vss_deinit(true);
|
|
}
|
|
|
|
/*
|
|
* Walk list of mounted file systems in the guest, and discard unused
|
|
* areas.
|
|
*/
|
|
void qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
|
|
{
|
|
error_set(errp, QERR_UNSUPPORTED);
|
|
}
|
|
|
|
typedef enum {
|
|
GUEST_SUSPEND_MODE_DISK,
|
|
GUEST_SUSPEND_MODE_RAM
|
|
} GuestSuspendMode;
|
|
|
|
static void check_suspend_mode(GuestSuspendMode mode, Error **errp)
|
|
{
|
|
SYSTEM_POWER_CAPABILITIES sys_pwr_caps;
|
|
Error *local_err = NULL;
|
|
|
|
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(errp, 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, %lu", GetLastError());
|
|
ret = -1;
|
|
}
|
|
g_free(mode);
|
|
return ret;
|
|
}
|
|
|
|
void qmp_guest_suspend_disk(Error **errp)
|
|
{
|
|
Error *local_err = NULL;
|
|
GuestSuspendMode *mode = g_malloc(sizeof(GuestSuspendMode));
|
|
|
|
*mode = GUEST_SUSPEND_MODE_DISK;
|
|
check_suspend_mode(*mode, &local_err);
|
|
acquire_privilege(SE_SHUTDOWN_NAME, &local_err);
|
|
execute_async(do_suspend, mode, &local_err);
|
|
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
g_free(mode);
|
|
}
|
|
}
|
|
|
|
void qmp_guest_suspend_ram(Error **errp)
|
|
{
|
|
Error *local_err = NULL;
|
|
GuestSuspendMode *mode = g_malloc(sizeof(GuestSuspendMode));
|
|
|
|
*mode = GUEST_SUSPEND_MODE_RAM;
|
|
check_suspend_mode(*mode, &local_err);
|
|
acquire_privilege(SE_SHUTDOWN_NAME, &local_err);
|
|
execute_async(do_suspend, mode, &local_err);
|
|
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
g_free(mode);
|
|
}
|
|
}
|
|
|
|
void qmp_guest_suspend_hybrid(Error **errp)
|
|
{
|
|
error_set(errp, QERR_UNSUPPORTED);
|
|
}
|
|
|
|
GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
|
|
{
|
|
error_set(errp, QERR_UNSUPPORTED);
|
|
return NULL;
|
|
}
|
|
|
|
int64_t qmp_guest_get_time(Error **errp)
|
|
{
|
|
SYSTEMTIME ts = {0};
|
|
int64_t time_ns;
|
|
FILETIME tf;
|
|
|
|
GetSystemTime(&ts);
|
|
if (ts.wYear < 1601 || ts.wYear > 30827) {
|
|
error_setg(errp, "Failed to get time");
|
|
return -1;
|
|
}
|
|
|
|
if (!SystemTimeToFileTime(&ts, &tf)) {
|
|
error_setg(errp, "Failed to convert system time: %d", (int)GetLastError());
|
|
return -1;
|
|
}
|
|
|
|
time_ns = ((((int64_t)tf.dwHighDateTime << 32) | tf.dwLowDateTime)
|
|
- W32_FT_OFFSET) * 100;
|
|
|
|
return time_ns;
|
|
}
|
|
|
|
void qmp_guest_set_time(bool has_time, int64_t time_ns, Error **errp)
|
|
{
|
|
Error *local_err = NULL;
|
|
SYSTEMTIME ts;
|
|
FILETIME tf;
|
|
LONGLONG time;
|
|
|
|
if (has_time) {
|
|
/* Okay, user passed a time to set. Validate it. */
|
|
if (time_ns < 0 || time_ns / 100 > INT64_MAX - W32_FT_OFFSET) {
|
|
error_setg(errp, "Time %" PRId64 "is invalid", time_ns);
|
|
return;
|
|
}
|
|
|
|
time = time_ns / 100 + W32_FT_OFFSET;
|
|
|
|
tf.dwLowDateTime = (DWORD) time;
|
|
tf.dwHighDateTime = (DWORD) (time >> 32);
|
|
|
|
if (!FileTimeToSystemTime(&tf, &ts)) {
|
|
error_setg(errp, "Failed to convert system time %d",
|
|
(int)GetLastError());
|
|
return;
|
|
}
|
|
} else {
|
|
/* Otherwise read the time from RTC which contains the correct value.
|
|
* Hopefully. */
|
|
GetSystemTime(&ts);
|
|
if (ts.wYear < 1601 || ts.wYear > 30827) {
|
|
error_setg(errp, "Failed to get time");
|
|
return;
|
|
}
|
|
}
|
|
|
|
acquire_privilege(SE_SYSTEMTIME_NAME, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
|
|
if (!SetSystemTime(&ts)) {
|
|
error_setg(errp, "Failed to set time to guest: %d", (int)GetLastError());
|
|
return;
|
|
}
|
|
}
|
|
|
|
GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp)
|
|
{
|
|
error_set(errp, QERR_UNSUPPORTED);
|
|
return NULL;
|
|
}
|
|
|
|
int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp)
|
|
{
|
|
error_set(errp, QERR_UNSUPPORTED);
|
|
return -1;
|
|
}
|
|
|
|
/* add unsupported commands to the blacklist */
|
|
GList *ga_command_blacklist_init(GList *blacklist)
|
|
{
|
|
const char *list_unsupported[] = {
|
|
"guest-file-open", "guest-file-close", "guest-file-read",
|
|
"guest-file-write", "guest-file-seek", "guest-file-flush",
|
|
"guest-suspend-hybrid", "guest-network-get-interfaces",
|
|
"guest-get-vcpus", "guest-set-vcpus",
|
|
"guest-fsfreeze-freeze-list", "guest-get-fsinfo",
|
|
"guest-fstrim", NULL};
|
|
char **p = (char **)list_unsupported;
|
|
|
|
while (*p) {
|
|
blacklist = g_list_append(blacklist, *p++);
|
|
}
|
|
|
|
if (!vss_init(true)) {
|
|
const char *list[] = {
|
|
"guest-get-fsinfo", "guest-fsfreeze-status",
|
|
"guest-fsfreeze-freeze", "guest-fsfreeze-thaw", NULL};
|
|
p = (char **)list;
|
|
|
|
while (*p) {
|
|
blacklist = g_list_append(blacklist, *p++);
|
|
}
|
|
}
|
|
|
|
return blacklist;
|
|
}
|
|
|
|
/* register init/cleanup routines for stateful command groups */
|
|
void ga_command_state_init(GAState *s, GACommandState *cs)
|
|
{
|
|
if (!vss_initialized()) {
|
|
ga_command_state_add(cs, NULL, guest_fsfreeze_cleanup);
|
|
}
|
|
}
|