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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
/*
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* QEMU Guest Agent win32-specific command implementations
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*
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* Copyright IBM Corp. 2012
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*
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* Authors:
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* Michael Roth <mdroth@linux.vnet.ibm.com>
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* Gal Hammer <ghammer@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include <glib.h>
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#include <wtypes.h>
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#include <powrprof.h>
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#include "qga/guest-agent-core.h"
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#include "qga/vss-win32.h"
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#include "qga-qmp-commands.h"
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#include "qapi/qmp/qerror.h"
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#ifndef SHTDN_REASON_FLAG_PLANNED
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#define SHTDN_REASON_FLAG_PLANNED 0x80000000
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#endif
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/* multiple of 100 nanoseconds elapsed between windows baseline
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* (1/1/1601) and Unix Epoch (1/1/1970), accounting for leap years */
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#define W32_FT_OFFSET (10000000ULL * 60 * 60 * 24 * \
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(365 * (1970 - 1601) + \
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(1970 - 1601) / 4 - 3))
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static void acquire_privilege(const char *name, Error **errp)
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{
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HANDLE token = NULL;
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TOKEN_PRIVILEGES priv;
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Error *local_err = NULL;
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if (OpenProcessToken(GetCurrentProcess(),
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TOKEN_ADJUST_PRIVILEGES|TOKEN_QUERY, &token))
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{
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if (!LookupPrivilegeValue(NULL, name, &priv.Privileges[0].Luid)) {
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error_set(&local_err, QERR_QGA_COMMAND_FAILED,
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"no luid for requested privilege");
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goto out;
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}
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priv.PrivilegeCount = 1;
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priv.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
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if (!AdjustTokenPrivileges(token, FALSE, &priv, 0, NULL, 0)) {
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error_set(&local_err, QERR_QGA_COMMAND_FAILED,
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"unable to acquire requested privilege");
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goto out;
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}
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} else {
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error_set(&local_err, QERR_QGA_COMMAND_FAILED,
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"failed to open privilege token");
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}
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out:
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if (token) {
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CloseHandle(token);
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}
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if (local_err) {
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error_propagate(errp, local_err);
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}
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}
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static void execute_async(DWORD WINAPI (*func)(LPVOID), LPVOID opaque,
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Error **errp)
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{
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Error *local_err = NULL;
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HANDLE thread = CreateThread(NULL, 0, func, opaque, 0, NULL);
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if (!thread) {
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error_set(&local_err, QERR_QGA_COMMAND_FAILED,
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"failed to dispatch asynchronous command");
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error_propagate(errp, local_err);
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}
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}
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void qmp_guest_shutdown(bool has_mode, const char *mode, Error **errp)
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{
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Error *local_err = NULL;
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UINT shutdown_flag = EWX_FORCE;
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slog("guest-shutdown called, mode: %s", mode);
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if (!has_mode || strcmp(mode, "powerdown") == 0) {
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shutdown_flag |= EWX_POWEROFF;
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} else if (strcmp(mode, "halt") == 0) {
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shutdown_flag |= EWX_SHUTDOWN;
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} else if (strcmp(mode, "reboot") == 0) {
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shutdown_flag |= EWX_REBOOT;
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} else {
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error_set(errp, QERR_INVALID_PARAMETER_VALUE, "mode",
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"halt|powerdown|reboot");
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return;
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}
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/* Request a shutdown privilege, but try to shut down the system
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anyway. */
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acquire_privilege(SE_SHUTDOWN_NAME, &local_err);
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if (local_err) {
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error_propagate(errp, local_err);
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return;
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}
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if (!ExitWindowsEx(shutdown_flag, SHTDN_REASON_FLAG_PLANNED)) {
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slog("guest-shutdown failed: %lu", GetLastError());
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error_set(errp, QERR_UNDEFINED_ERROR);
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}
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}
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int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode,
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Error **errp)
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{
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error_set(errp, QERR_UNSUPPORTED);
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return 0;
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}
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void qmp_guest_file_close(int64_t handle, Error **errp)
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{
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error_set(errp, QERR_UNSUPPORTED);
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}
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GuestFileRead *qmp_guest_file_read(int64_t handle, bool has_count,
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int64_t count, Error **errp)
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{
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error_set(errp, QERR_UNSUPPORTED);
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return 0;
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}
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GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64,
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bool has_count, int64_t count,
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Error **errp)
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{
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error_set(errp, QERR_UNSUPPORTED);
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return 0;
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}
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GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset,
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int64_t whence, Error **errp)
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{
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error_set(errp, QERR_UNSUPPORTED);
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return 0;
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}
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void qmp_guest_file_flush(int64_t handle, Error **errp)
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{
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error_set(errp, QERR_UNSUPPORTED);
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}
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GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp)
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{
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error_set(errp, QERR_UNSUPPORTED);
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return NULL;
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}
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/*
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* Return status of freeze/thaw
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*/
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GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp)
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{
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if (!vss_initialized()) {
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error_set(errp, QERR_UNSUPPORTED);
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return 0;
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}
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if (ga_is_frozen(ga_state)) {
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return GUEST_FSFREEZE_STATUS_FROZEN;
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}
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return GUEST_FSFREEZE_STATUS_THAWED;
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}
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/*
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* Freeze local file systems using Volume Shadow-copy Service.
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* The frozen state is limited for up to 10 seconds by VSS.
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*/
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int64_t qmp_guest_fsfreeze_freeze(Error **errp)
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{
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int i;
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Error *local_err = NULL;
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if (!vss_initialized()) {
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error_set(errp, QERR_UNSUPPORTED);
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return 0;
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}
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slog("guest-fsfreeze called");
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/* cannot risk guest agent blocking itself on a write in this state */
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ga_set_frozen(ga_state);
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qga_vss_fsfreeze(&i, &local_err, true);
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if (local_err) {
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error_propagate(errp, local_err);
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goto error;
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}
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return i;
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error:
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local_err = NULL;
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qmp_guest_fsfreeze_thaw(&local_err);
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if (local_err) {
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g_debug("cleanup thaw: %s", error_get_pretty(local_err));
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error_free(local_err);
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}
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return 0;
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}
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int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints,
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strList *mountpoints,
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Error **errp)
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{
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error_set(errp, QERR_UNSUPPORTED);
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return 0;
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}
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/*
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* Thaw local file systems using Volume Shadow-copy Service.
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*/
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int64_t qmp_guest_fsfreeze_thaw(Error **errp)
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{
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int i;
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if (!vss_initialized()) {
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error_set(errp, QERR_UNSUPPORTED);
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return 0;
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}
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qga_vss_fsfreeze(&i, errp, false);
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ga_unset_frozen(ga_state);
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return i;
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}
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static void guest_fsfreeze_cleanup(void)
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{
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Error *err = NULL;
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if (!vss_initialized()) {
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return;
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}
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if (ga_is_frozen(ga_state) == GUEST_FSFREEZE_STATUS_FROZEN) {
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qmp_guest_fsfreeze_thaw(&err);
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if (err) {
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slog("failed to clean up frozen filesystems: %s",
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error_get_pretty(err));
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error_free(err);
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}
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}
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vss_deinit(true);
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}
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/*
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* Walk list of mounted file systems in the guest, and discard unused
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* areas.
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*/
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void qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
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{
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error_set(errp, QERR_UNSUPPORTED);
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}
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typedef enum {
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GUEST_SUSPEND_MODE_DISK,
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GUEST_SUSPEND_MODE_RAM
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} GuestSuspendMode;
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static void check_suspend_mode(GuestSuspendMode mode, Error **errp)
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{
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SYSTEM_POWER_CAPABILITIES sys_pwr_caps;
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Error *local_err = NULL;
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ZeroMemory(&sys_pwr_caps, sizeof(sys_pwr_caps));
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if (!GetPwrCapabilities(&sys_pwr_caps)) {
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error_set(&local_err, QERR_QGA_COMMAND_FAILED,
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"failed to determine guest suspend capabilities");
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goto out;
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}
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switch (mode) {
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case GUEST_SUSPEND_MODE_DISK:
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if (!sys_pwr_caps.SystemS4) {
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error_set(&local_err, QERR_QGA_COMMAND_FAILED,
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"suspend-to-disk not supported by OS");
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}
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break;
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case GUEST_SUSPEND_MODE_RAM:
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if (!sys_pwr_caps.SystemS3) {
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error_set(&local_err, QERR_QGA_COMMAND_FAILED,
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"suspend-to-ram not supported by OS");
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}
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break;
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default:
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error_set(&local_err, QERR_INVALID_PARAMETER_VALUE, "mode",
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"GuestSuspendMode");
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}
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out:
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if (local_err) {
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error_propagate(errp, local_err);
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}
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}
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static DWORD WINAPI do_suspend(LPVOID opaque)
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{
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GuestSuspendMode *mode = opaque;
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DWORD ret = 0;
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if (!SetSuspendState(*mode == GUEST_SUSPEND_MODE_DISK, TRUE, TRUE)) {
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slog("failed to suspend guest, %lu", GetLastError());
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ret = -1;
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}
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g_free(mode);
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return ret;
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}
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void qmp_guest_suspend_disk(Error **errp)
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{
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Error *local_err = NULL;
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GuestSuspendMode *mode = g_malloc(sizeof(GuestSuspendMode));
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*mode = GUEST_SUSPEND_MODE_DISK;
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check_suspend_mode(*mode, &local_err);
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acquire_privilege(SE_SHUTDOWN_NAME, &local_err);
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execute_async(do_suspend, mode, &local_err);
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if (local_err) {
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error_propagate(errp, local_err);
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g_free(mode);
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}
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}
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void qmp_guest_suspend_ram(Error **errp)
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{
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Error *local_err = NULL;
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GuestSuspendMode *mode = g_malloc(sizeof(GuestSuspendMode));
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*mode = GUEST_SUSPEND_MODE_RAM;
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check_suspend_mode(*mode, &local_err);
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acquire_privilege(SE_SHUTDOWN_NAME, &local_err);
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execute_async(do_suspend, mode, &local_err);
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if (local_err) {
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error_propagate(errp, local_err);
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g_free(mode);
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}
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}
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void qmp_guest_suspend_hybrid(Error **errp)
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{
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error_set(errp, QERR_UNSUPPORTED);
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}
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GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
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{
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error_set(errp, QERR_UNSUPPORTED);
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return NULL;
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}
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int64_t qmp_guest_get_time(Error **errp)
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{
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SYSTEMTIME ts = {0};
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int64_t time_ns;
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FILETIME tf;
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GetSystemTime(&ts);
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if (ts.wYear < 1601 || ts.wYear > 30827) {
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error_setg(errp, "Failed to get time");
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return -1;
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}
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if (!SystemTimeToFileTime(&ts, &tf)) {
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error_setg(errp, "Failed to convert system time: %d", (int)GetLastError());
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return -1;
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}
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time_ns = ((((int64_t)tf.dwHighDateTime << 32) | tf.dwLowDateTime)
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- W32_FT_OFFSET) * 100;
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return time_ns;
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}
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void qmp_guest_set_time(bool has_time, int64_t time_ns, Error **errp)
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{
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Error *local_err = NULL;
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SYSTEMTIME ts;
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FILETIME tf;
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LONGLONG time;
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if (has_time) {
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/* Okay, user passed a time to set. Validate it. */
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if (time_ns < 0 || time_ns / 100 > INT64_MAX - W32_FT_OFFSET) {
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error_setg(errp, "Time %" PRId64 "is invalid", time_ns);
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return;
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}
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time = time_ns / 100 + W32_FT_OFFSET;
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tf.dwLowDateTime = (DWORD) time;
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tf.dwHighDateTime = (DWORD) (time >> 32);
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if (!FileTimeToSystemTime(&tf, &ts)) {
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error_setg(errp, "Failed to convert system time %d",
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(int)GetLastError());
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return;
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}
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} else {
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/* Otherwise read the time from RTC which contains the correct value.
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* Hopefully. */
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GetSystemTime(&ts);
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if (ts.wYear < 1601 || ts.wYear > 30827) {
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error_setg(errp, "Failed to get time");
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return;
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}
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}
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acquire_privilege(SE_SYSTEMTIME_NAME, &local_err);
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if (local_err) {
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error_propagate(errp, local_err);
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return;
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}
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if (!SetSystemTime(&ts)) {
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error_setg(errp, "Failed to set time to guest: %d", (int)GetLastError());
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return;
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}
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}
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GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp)
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{
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error_set(errp, QERR_UNSUPPORTED);
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return NULL;
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}
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int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp)
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{
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error_set(errp, QERR_UNSUPPORTED);
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return -1;
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}
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/* add unsupported commands to the blacklist */
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GList *ga_command_blacklist_init(GList *blacklist)
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{
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const char *list_unsupported[] = {
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"guest-file-open", "guest-file-close", "guest-file-read",
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"guest-file-write", "guest-file-seek", "guest-file-flush",
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"guest-suspend-hybrid", "guest-network-get-interfaces",
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"guest-get-vcpus", "guest-set-vcpus",
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"guest-fsfreeze-freeze-list", "guest-get-fsinfo",
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"guest-fstrim", NULL};
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char **p = (char **)list_unsupported;
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while (*p) {
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blacklist = g_list_append(blacklist, *p++);
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}
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if (!vss_init(true)) {
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const char *list[] = {
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"guest-get-fsinfo", "guest-fsfreeze-status",
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"guest-fsfreeze-freeze", "guest-fsfreeze-thaw", NULL};
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p = (char **)list;
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while (*p) {
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blacklist = g_list_append(blacklist, *p++);
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}
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}
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return blacklist;
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}
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/* register init/cleanup routines for stateful command groups */
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void ga_command_state_init(GAState *s, GACommandState *cs)
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{
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if (!vss_initialized()) {
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ga_command_state_add(cs, NULL, guest_fsfreeze_cleanup);
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}
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}
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