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qemu-ga: add Windows service integration

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This allows qemu-ga to function as a Windows service:

 - to install the service (will auto-start on boot):
     qemu-ga --service install
 - to start the service:
     net start qemu-ga
 - to stop the service:
     net stop qemu-ga
 - to uninstall service:
     qemu-ga --service uninstall

Original patch by Gal Hammer <ghammer@redhat.com>
This commit is contained in:
Michael Roth
2012-01-21 16:42:27 -06:00
parent 7868e26e59
commit bc62fa039c
4 changed files with 249 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
Makefile.objs
View File

@@ -426,7 +426,7 @@ common-obj-y += qmp.o hmp.o
qga-nested-y = commands.o guest-agent-command-state.o
qga-nested-$(CONFIG_POSIX) += commands-posix.o channel-posix.o
qga-nested-$(CONFIG_WIN32) += commands-win32.o channel-win32.o
qga-nested-$(CONFIG_WIN32) += commands-win32.o channel-win32.o service-win32.o
qga-obj-y = $(addprefix qga/, $(qga-nested-y))
qga-obj-y += qemu-ga.o module.o
qga-obj-$(CONFIG_WIN32) += oslib-win32.o

113
qemu-ga.c
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@@ -29,6 +29,10 @@
#include "error_int.h"
#include "qapi/qmp-core.h"
#include "qga/channel.h"
#ifdef _WIN32
#include "qga/service-win32.h"
#include <windows.h>
#endif
#ifndef _WIN32
#define QGA_VIRTIO_PATH_DEFAULT "/dev/virtio-ports/org.qemu.guest_agent.0"
@@ -46,11 +50,19 @@ struct GAState {
GLogLevelFlags log_level;
FILE *log_file;
bool logging_enabled;
#ifdef _WIN32
GAService service;
#endif
};
static struct GAState *ga_state;
#ifndef _WIN32
#ifdef _WIN32
DWORD WINAPI service_ctrl_handler(DWORD ctrl, DWORD type, LPVOID data,
LPVOID ctx);
VOID WINAPI service_main(DWORD argc, TCHAR *argv[]);
#endif
static void quit_handler(int sig)
{
g_debug("received signal num %d, quitting", sig);
@@ -60,6 +72,7 @@ static void quit_handler(int sig)
}
}
#ifndef _WIN32
static gboolean register_signal_handlers(void)
{
struct sigaction sigact;
@@ -95,8 +108,9 @@ static void usage(const char *cmd)
" -f, --pidfile specify pidfile (default is %s)\n"
" -v, --verbose log extra debugging information\n"
" -V, --version print version information and exit\n"
#ifndef _WIN32
" -d, --daemonize become a daemon\n"
#ifdef _WIN32
" -s, --service service commands: install, uninstall\n"
#endif
" -b, --blacklist comma-separated list of RPCs to disable (no spaces, \"?\""
" to list available RPCs)\n"
@@ -394,20 +408,77 @@ static gboolean channel_init(GAState *s, const gchar *method, const gchar *path)
return true;
}
#ifdef _WIN32
DWORD WINAPI service_ctrl_handler(DWORD ctrl, DWORD type, LPVOID data,
LPVOID ctx)
{
DWORD ret = NO_ERROR;
GAService *service = &ga_state->service;
switch (ctrl)
{
case SERVICE_CONTROL_STOP:
case SERVICE_CONTROL_SHUTDOWN:
quit_handler(SIGTERM);
service->status.dwCurrentState = SERVICE_STOP_PENDING;
SetServiceStatus(service->status_handle, &service->status);
break;
default:
ret = ERROR_CALL_NOT_IMPLEMENTED;
}
return ret;
}
VOID WINAPI service_main(DWORD argc, TCHAR *argv[])
{
GAService *service = &ga_state->service;
service->status_handle = RegisterServiceCtrlHandlerEx(QGA_SERVICE_NAME,
service_ctrl_handler, NULL);
if (service->status_handle == 0) {
g_critical("Failed to register extended requests function!\n");
return;
}
service->status.dwServiceType = SERVICE_WIN32;
service->status.dwCurrentState = SERVICE_RUNNING;
service->status.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_SHUTDOWN;
service->status.dwWin32ExitCode = NO_ERROR;
service->status.dwServiceSpecificExitCode = NO_ERROR;
service->status.dwCheckPoint = 0;
service->status.dwWaitHint = 0;
SetServiceStatus(service->status_handle, &service->status);
g_main_loop_run(ga_state->main_loop);
service->status.dwCurrentState = SERVICE_STOPPED;
SetServiceStatus(service->status_handle, &service->status);
}
#endif
int main(int argc, char **argv)
{
const char *sopt = "hVvdm:p:l:f:b:";
const char *sopt = "hVvdm:p:l:f:b:s:";
const char *method = NULL, *path = NULL, *pidfile = QGA_PIDFILE_DEFAULT;
const char *log_file_name = NULL;
#ifdef _WIN32
const char *service = NULL;
#endif
const struct option lopt[] = {
{ "help", 0, NULL, 'h' },
{ "version", 0, NULL, 'V' },
{ "logfile", 0, NULL, 'l' },
{ "pidfile", 0, NULL, 'f' },
{ "logfile", 1, NULL, 'l' },
{ "pidfile", 1, NULL, 'f' },
{ "verbose", 0, NULL, 'v' },
{ "method", 0, NULL, 'm' },
{ "path", 0, NULL, 'p' },
{ "method", 1, NULL, 'm' },
{ "path", 1, NULL, 'p' },
{ "daemonize", 0, NULL, 'd' },
{ "blacklist", 0, NULL, 'b' },
{ "blacklist", 1, NULL, 'b' },
#ifdef _WIN32
{ "service", 1, NULL, 's' },
#endif
{ NULL, 0, NULL, 0 }
};
int opt_ind = 0, ch, daemonize = 0, i, j, len;
@@ -426,7 +497,8 @@ int main(int argc, char **argv)
path = optarg;
break;
case 'l':
log_file = fopen(optarg, "a");
log_file_name = optarg;
log_file = fopen(log_file_name, "a");
if (!log_file) {
g_critical("unable to open specified log file: %s",
strerror(errno));
@@ -472,6 +544,19 @@ int main(int argc, char **argv)
}
break;
}
#ifdef _WIN32
case 's':
service = optarg;
if (strcmp(service, "install") == 0) {
return ga_install_service(path, log_file_name);
} else if (strcmp(service, "uninstall") == 0) {
return ga_uninstall_service();
} else {
printf("Unknown service command.\n");
return EXIT_FAILURE;
}
break;
#endif
case 'h':
usage(argv[0]);
return 0;
@@ -512,7 +597,17 @@ int main(int argc, char **argv)
g_critical("failed to initialize guest agent channel");
goto out_bad;
}
#ifndef _WIN32
g_main_loop_run(ga_state->main_loop);
#else
if (daemonize) {
SERVICE_TABLE_ENTRY service_table[] = {
{ (char *)QGA_SERVICE_NAME, service_main }, { NULL, NULL } };
StartServiceCtrlDispatcher(service_table);
} else {
g_main_loop_run(ga_state->main_loop);
}
#endif
ga_command_state_cleanup_all(ga_state->command_state);
ga_channel_free(ga_state->channel);

114
qga/service-win32.c Normal file
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@@ -0,0 +1,114 @@
/*
* QEMU Guest Agent helpers for win32 service management
*
* Copyright IBM Corp. 2012
*
* Authors:
* Gal Hammer <ghammer@redhat.com>
* Michael Roth <mdroth@linux.vnet.ibm.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 <stdlib.h>
#include <stdio.h>
#include <glib.h>
#include <windows.h>
#include "qga/service-win32.h"
static int printf_win_error(const char *text)
{
DWORD err = GetLastError();
char *message;
int n;
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
err,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(char *)&message, 0,
NULL);
n = printf("%s. (Error: %d) %s", text, err, message);
LocalFree(message);
return n;
}
int ga_install_service(const char *path, const char *logfile)
{
SC_HANDLE manager;
SC_HANDLE service;
TCHAR cmdline[MAX_PATH];
if (GetModuleFileName(NULL, cmdline, MAX_PATH) == 0) {
printf_win_error("No full path to service's executable");
return EXIT_FAILURE;
}
_snprintf(cmdline, MAX_PATH - strlen(cmdline), "%s -d", cmdline);
if (path) {
_snprintf(cmdline, MAX_PATH - strlen(cmdline), "%s -p %s", cmdline, path);
}
if (logfile) {
_snprintf(cmdline, MAX_PATH - strlen(cmdline), "%s -l %s -v",
cmdline, logfile);
}
g_debug("service's cmdline: %s", cmdline);
manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
if (manager == NULL) {
printf_win_error("No handle to service control manager");
return EXIT_FAILURE;
}
service = CreateService(manager, QGA_SERVICE_NAME, QGA_SERVICE_DISPLAY_NAME,
SERVICE_ALL_ACCESS, SERVICE_WIN32_OWN_PROCESS, SERVICE_AUTO_START,
SERVICE_ERROR_NORMAL, cmdline, NULL, NULL, NULL, NULL, NULL);
if (service) {
SERVICE_DESCRIPTION desc = { (char *)QGA_SERVICE_DESCRIPTION };
ChangeServiceConfig2(service, SERVICE_CONFIG_DESCRIPTION, &desc);
printf("Service was installed successfully.\n");
} else {
printf_win_error("Failed to install service");
}
CloseServiceHandle(service);
CloseServiceHandle(manager);
return (service == NULL);
}
int ga_uninstall_service(void)
{
SC_HANDLE manager;
SC_HANDLE service;
manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
if (manager == NULL) {
printf_win_error("No handle to service control manager");
return EXIT_FAILURE;
}
service = OpenService(manager, QGA_SERVICE_NAME, DELETE);
if (service == NULL) {
printf_win_error("No handle to service");
CloseServiceHandle(manager);
return EXIT_FAILURE;
}
if (DeleteService(service) == FALSE) {
printf_win_error("Failed to delete service");
} else {
printf("Service was deleted successfully.\n");
}
CloseServiceHandle(service);
CloseServiceHandle(manager);
return EXIT_SUCCESS;
}

30
qga/service-win32.h Normal file
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@@ -0,0 +1,30 @@
/*
* QEMU Guest Agent helpers for win32 service management
*
* Copyright IBM Corp. 2012
*
* Authors:
* Gal Hammer <ghammer@redhat.com>
* Michael Roth <mdroth@linux.vnet.ibm.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.
*/
#ifndef QGA_SERVICE_H
#define QGA_SERVICE_H
#include <windows.h>
#define QGA_SERVICE_DISPLAY_NAME "QEMU Guest Agent"
#define QGA_SERVICE_NAME "qemu-ga"
#define QGA_SERVICE_DESCRIPTION "Enables integration with QEMU machine emulator and virtualizer."
typedef struct GAService {
SERVICE_STATUS status;
SERVICE_STATUS_HANDLE status_handle;
} GAService;
int ga_install_service(const char *path, const char *logfile);
int ga_uninstall_service(void);
#endif