#include <stdio.h>
#include <stdbool.h>
#include <glib.h>
-#include <gio/gio.h>
#include <getopt.h>
-#include <termios.h>
+#ifndef _WIN32
#include <syslog.h>
-#include "qemu_socket.h"
+#include <sys/wait.h>
+#include <sys/stat.h>
+#endif
#include "json-streamer.h"
#include "json-parser.h"
#include "qint.h"
#include "signal.h"
#include "qerror.h"
#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"
+#else
+#define QGA_VIRTIO_PATH_DEFAULT "\\\\.\\Global\\org.qemu.guest_agent.0"
+#endif
#define QGA_PIDFILE_DEFAULT "/var/run/qemu-ga.pid"
-#define QGA_BAUDRATE_DEFAULT B38400 /* for isa-serial channels */
-#define QGA_TIMEOUT_DEFAULT 30*1000 /* ms */
+#define QGA_STATEDIR_DEFAULT "/tmp"
+#define QGA_SENTINEL_BYTE 0xFF
struct GAState {
JSONMessageParser parser;
GMainLoop *main_loop;
- GSocket *conn_sock;
- GIOChannel *conn_channel;
- GSocket *listen_sock;
- GIOChannel *listen_channel;
- const char *path;
- const char *method;
+ GAChannel *channel;
bool virtio; /* fastpath to check for virtio to deal with poll() quirks */
GACommandState *command_state;
GLogLevelFlags log_level;
FILE *log_file;
bool logging_enabled;
+#ifdef _WIN32
+ GAService service;
+#endif
+ bool delimit_response;
+ bool frozen;
+ GList *blacklist;
+ const char *state_filepath_isfrozen;
+ struct {
+ const char *log_filepath;
+ const char *pid_filepath;
+ } deferred_options;
+};
+
+struct GAState *ga_state;
+
+/* commands that are safe to issue while filesystems are frozen */
+static const char *ga_freeze_whitelist[] = {
+ "guest-ping",
+ "guest-info",
+ "guest-sync",
+ "guest-fsfreeze-status",
+ "guest-fsfreeze-thaw",
+ NULL
};
-static struct GAState *ga_state;
+#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("recieved signal num %d, quitting", sig);
+ /* if we're frozen, don't exit unless we're absolutely forced to,
+ * because it's basically impossible for graceful exit to complete
+ * unless all log/pid files are on unfreezable filesystems. there's
+ * also a very likely chance killing the agent before unfreezing
+ * the filesystems is a mistake (or will be viewed as one later).
+ */
+ if (ga_is_frozen(ga_state)) {
+ return;
+ }
+ g_debug("received signal num %d, quitting", sig);
if (g_main_loop_is_running(ga_state->main_loop)) {
g_main_loop_quit(ga_state->main_loop);
}
}
-static void register_signal_handlers(void)
+#ifndef _WIN32
+static gboolean register_signal_handlers(void)
{
struct sigaction sigact;
int ret;
ret = sigaction(SIGINT, &sigact, NULL);
if (ret == -1) {
g_error("error configuring signal handler: %s", strerror(errno));
- exit(EXIT_FAILURE);
+ return false;
}
ret = sigaction(SIGTERM, &sigact, NULL);
if (ret == -1) {
g_error("error configuring signal handler: %s", strerror(errno));
+ return false;
+ }
+
+ return true;
+}
+
+/* TODO: use this in place of all post-fork() fclose(std*) callers */
+void reopen_fd_to_null(int fd)
+{
+ int nullfd;
+
+ nullfd = open("/dev/null", O_RDWR);
+ if (nullfd < 0) {
+ return;
+ }
+
+ dup2(nullfd, fd);
+
+ if (nullfd != fd) {
+ close(nullfd);
}
}
+#endif
static void usage(const char *cmd)
{
printf(
-"Usage: %s -c <channel_opts>\n"
+"Usage: %s [-m <method> -p <path>] [<options>]\n"
"QEMU Guest Agent %s\n"
"\n"
" -m, --method transport method: one of unix-listen, virtio-serial, or\n"
" isa-serial (virtio-serial is the default)\n"
-" -p, --path device/socket path (%s is the default for virtio-serial)\n"
+" -p, --path device/socket path (the default for virtio-serial is:\n"
+" %s)\n"
" -l, --logfile set logfile path, logs to stderr by default\n"
" -f, --pidfile specify pidfile (default is %s)\n"
+" -t, --statedir specify dir to store state information (absolute paths\n"
+" only, default is %s)\n"
" -v, --verbose log extra debugging information\n"
" -V, --version print version information and exit\n"
" -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, \"?\"\n"
+" to list available RPCs)\n"
" -h, --help display this help and exit\n"
"\n"
- , cmd, QGA_VERSION, QGA_VIRTIO_PATH_DEFAULT, QGA_PIDFILE_DEFAULT);
+ , cmd, QEMU_VERSION, QGA_VIRTIO_PATH_DEFAULT, QGA_PIDFILE_DEFAULT,
+ QGA_STATEDIR_DEFAULT);
}
-static void conn_channel_close(GAState *s);
-
static const char *ga_log_level_str(GLogLevelFlags level)
{
switch (level & G_LOG_LEVEL_MASK) {
}
level &= G_LOG_LEVEL_MASK;
- if (g_strcmp0(domain, "syslog") == 0) {
+#ifndef _WIN32
+ if (domain && strcmp(domain, "syslog") == 0) {
syslog(LOG_INFO, "%s: %s", level_str, msg);
} else if (level & s->log_level) {
+#else
+ if (level & s->log_level) {
+#endif
g_get_current_time(&time);
fprintf(s->log_file,
"%lu.%lu: %s: %s\n", time.tv_sec, time.tv_usec, level_str, msg);
}
}
+void ga_set_response_delimited(GAState *s)
+{
+ s->delimit_response = true;
+}
+
+#ifndef _WIN32
+static bool ga_open_pidfile(const char *pidfile)
+{
+ int pidfd;
+ char pidstr[32];
+
+ pidfd = open(pidfile, O_CREAT|O_WRONLY, S_IRUSR|S_IWUSR);
+ if (pidfd == -1 || lockf(pidfd, F_TLOCK, 0)) {
+ g_critical("Cannot lock pid file, %s", strerror(errno));
+ return false;
+ }
+
+ if (ftruncate(pidfd, 0) || lseek(pidfd, 0, SEEK_SET)) {
+ g_critical("Failed to truncate pid file");
+ goto fail;
+ }
+ sprintf(pidstr, "%d", getpid());
+ if (write(pidfd, pidstr, strlen(pidstr)) != strlen(pidstr)) {
+ g_critical("Failed to write pid file");
+ goto fail;
+ }
+
+ return true;
+
+fail:
+ unlink(pidfile);
+ return false;
+}
+#else /* _WIN32 */
+static bool ga_open_pidfile(const char *pidfile)
+{
+ return true;
+}
+#endif
+
+static gint ga_strcmp(gconstpointer str1, gconstpointer str2)
+{
+ return strcmp(str1, str2);
+}
+
+/* disable commands that aren't safe for fsfreeze */
+static void ga_disable_non_whitelisted(void)
+{
+ char **list_head, **list;
+ bool whitelisted;
+ int i;
+
+ list_head = list = qmp_get_command_list();
+ while (*list != NULL) {
+ whitelisted = false;
+ i = 0;
+ while (ga_freeze_whitelist[i] != NULL) {
+ if (strcmp(*list, ga_freeze_whitelist[i]) == 0) {
+ whitelisted = true;
+ }
+ i++;
+ }
+ if (!whitelisted) {
+ g_debug("disabling command: %s", *list);
+ qmp_disable_command(*list);
+ }
+ g_free(*list);
+ list++;
+ }
+ g_free(list_head);
+}
+
+/* [re-]enable all commands, except those explicitly blacklisted by user */
+static void ga_enable_non_blacklisted(GList *blacklist)
+{
+ char **list_head, **list;
+
+ list_head = list = qmp_get_command_list();
+ while (*list != NULL) {
+ if (g_list_find_custom(blacklist, *list, ga_strcmp) == NULL &&
+ !qmp_command_is_enabled(*list)) {
+ g_debug("enabling command: %s", *list);
+ qmp_enable_command(*list);
+ }
+ g_free(*list);
+ list++;
+ }
+ g_free(list_head);
+}
+
+static bool ga_create_file(const char *path)
+{
+ int fd = open(path, O_CREAT | O_WRONLY, S_IWUSR | S_IRUSR);
+ if (fd == -1) {
+ g_warning("unable to open/create file %s: %s", path, strerror(errno));
+ return false;
+ }
+ close(fd);
+ return true;
+}
+
+static bool ga_delete_file(const char *path)
+{
+ int ret = unlink(path);
+ if (ret == -1) {
+ g_warning("unable to delete file: %s: %s", path, strerror(errno));
+ return false;
+ }
+
+ return true;
+}
+
+bool ga_is_frozen(GAState *s)
+{
+ return s->frozen;
+}
+
+void ga_set_frozen(GAState *s)
+{
+ if (ga_is_frozen(s)) {
+ return;
+ }
+ /* disable all non-whitelisted (for frozen state) commands */
+ ga_disable_non_whitelisted();
+ g_warning("disabling logging due to filesystem freeze");
+ ga_disable_logging(s);
+ s->frozen = true;
+ if (!ga_create_file(s->state_filepath_isfrozen)) {
+ g_warning("unable to create %s, fsfreeze may not function properly",
+ s->state_filepath_isfrozen);
+ }
+}
+
+void ga_unset_frozen(GAState *s)
+{
+ if (!ga_is_frozen(s)) {
+ return;
+ }
+
+ /* if we delayed creation/opening of pid/log files due to being
+ * in a frozen state at start up, do it now
+ */
+ if (s->deferred_options.log_filepath) {
+ s->log_file = fopen(s->deferred_options.log_filepath, "a");
+ if (!s->log_file) {
+ s->log_file = stderr;
+ }
+ s->deferred_options.log_filepath = NULL;
+ }
+ ga_enable_logging(s);
+ g_warning("logging re-enabled due to filesystem unfreeze");
+ if (s->deferred_options.pid_filepath) {
+ if (!ga_open_pidfile(s->deferred_options.pid_filepath)) {
+ g_warning("failed to create/open pid file");
+ }
+ s->deferred_options.pid_filepath = NULL;
+ }
+
+ /* enable all disabled, non-blacklisted commands */
+ ga_enable_non_blacklisted(s->blacklist);
+ s->frozen = false;
+ if (!ga_delete_file(s->state_filepath_isfrozen)) {
+ g_warning("unable to delete %s, fsfreeze may not function properly",
+ s->state_filepath_isfrozen);
+ }
+}
+
static void become_daemon(const char *pidfile)
{
+#ifndef _WIN32
pid_t pid, sid;
- int pidfd;
- char *pidstr = NULL;
pid = fork();
if (pid < 0) {
exit(EXIT_SUCCESS);
}
- pidfd = open(pidfile, O_CREAT|O_WRONLY|O_EXCL, S_IRUSR|S_IWUSR);
- if (pidfd == -1) {
- g_critical("Cannot create pid file, %s", strerror(errno));
- exit(EXIT_FAILURE);
- }
-
- if (asprintf(&pidstr, "%d", getpid()) == -1) {
- g_critical("Cannot allocate memory");
- goto fail;
- }
- if (write(pidfd, pidstr, strlen(pidstr)) != strlen(pidstr)) {
- free(pidstr);
- g_critical("Failed to write pid file");
- goto fail;
+ if (pidfile) {
+ if (!ga_open_pidfile(pidfile)) {
+ g_critical("failed to create pidfile");
+ exit(EXIT_FAILURE);
+ }
}
umask(0);
goto fail;
}
- close(STDIN_FILENO);
- close(STDOUT_FILENO);
- close(STDERR_FILENO);
- free(pidstr);
+ reopen_fd_to_null(STDIN_FILENO);
+ reopen_fd_to_null(STDOUT_FILENO);
+ reopen_fd_to_null(STDERR_FILENO);
return;
fail:
unlink(pidfile);
g_critical("failed to daemonize");
exit(EXIT_FAILURE);
+#endif
}
-static int conn_channel_send_buf(GIOChannel *channel, const char *buf,
- gsize count)
+static int send_response(GAState *s, QObject *payload)
{
- GError *err = NULL;
- gsize written = 0;
- GIOStatus status;
-
- while (count) {
- status = g_io_channel_write_chars(channel, buf, count, &written, &err);
- g_debug("sending data, count: %d", (int)count);
- if (err != NULL) {
- g_warning("error sending newline: %s", err->message);
- return err->code;
- }
- if (status == G_IO_STATUS_ERROR || status == G_IO_STATUS_EOF) {
- return -EPIPE;
- }
-
- if (status == G_IO_STATUS_NORMAL) {
- count -= written;
- }
- }
-
- return 0;
-}
-
-static int conn_channel_send_payload(GIOChannel *channel, QObject *payload)
-{
- int ret = 0;
const char *buf;
- QString *payload_qstr;
- GError *err = NULL;
+ QString *payload_qstr, *response_qstr;
+ GIOStatus status;
- g_assert(payload && channel);
+ g_assert(payload && s->channel);
payload_qstr = qobject_to_json(payload);
if (!payload_qstr) {
return -EINVAL;
}
- qstring_append_chr(payload_qstr, '\n');
- buf = qstring_get_str(payload_qstr);
- ret = conn_channel_send_buf(channel, buf, strlen(buf));
- if (ret) {
- goto out_free;
+ if (s->delimit_response) {
+ s->delimit_response = false;
+ response_qstr = qstring_new();
+ qstring_append_chr(response_qstr, QGA_SENTINEL_BYTE);
+ qstring_append(response_qstr, qstring_get_str(payload_qstr));
+ QDECREF(payload_qstr);
+ } else {
+ response_qstr = payload_qstr;
}
- g_io_channel_flush(channel, &err);
- if (err != NULL) {
- g_warning("error flushing payload: %s", err->message);
- ret = err->code;
- goto out_free;
+ qstring_append_chr(response_qstr, '\n');
+ buf = qstring_get_str(response_qstr);
+ status = ga_channel_write_all(s->channel, buf, strlen(buf));
+ QDECREF(response_qstr);
+ if (status != G_IO_STATUS_NORMAL) {
+ return -EIO;
}
-out_free:
- QDECREF(payload_qstr);
- if (err) {
- g_error_free(err);
- }
- return ret;
+ return 0;
}
static void process_command(GAState *s, QDict *req)
g_debug("processing command");
rsp = qmp_dispatch(QOBJECT(req));
if (rsp) {
- ret = conn_channel_send_payload(s->conn_channel, rsp);
+ ret = send_response(s, rsp);
if (ret) {
- g_warning("error sending payload: %s", strerror(ret));
+ g_warning("error sending response: %s", strerror(ret));
}
qobject_decref(rsp);
- } else {
- g_warning("error getting response");
}
}
qdict_put_obj(qdict, "error", error_get_qobject(err));
error_free(err);
}
- ret = conn_channel_send_payload(s->conn_channel, QOBJECT(qdict));
+ ret = send_response(s, QOBJECT(qdict));
if (ret) {
- g_warning("error sending payload: %s", strerror(ret));
+ g_warning("error sending error response: %s", strerror(ret));
}
}
QDECREF(qdict);
}
-static gboolean conn_channel_read(GIOChannel *channel, GIOCondition condition,
- gpointer data)
+/* false return signals GAChannel to close the current client connection */
+static gboolean channel_event_cb(GIOCondition condition, gpointer data)
{
GAState *s = data;
- gchar buf[1024];
+ gchar buf[QGA_READ_COUNT_DEFAULT+1];
gsize count;
GError *err = NULL;
- memset(buf, 0, 1024);
- GIOStatus status = g_io_channel_read_chars(channel, buf, 1024,
- &count, &err);
+ GIOStatus status = ga_channel_read(s->channel, buf, QGA_READ_COUNT_DEFAULT, &count);
if (err != NULL) {
g_warning("error reading channel: %s", err->message);
- conn_channel_close(s);
g_error_free(err);
return false;
}
switch (status) {
case G_IO_STATUS_ERROR:
- g_warning("problem");
+ g_warning("error reading channel");
return false;
case G_IO_STATUS_NORMAL:
+ buf[count] = 0;
g_debug("read data, count: %d, data: %s", (int)count, buf);
json_message_parser_feed(&s->parser, (char *)buf, (int)count);
+ break;
+ case G_IO_STATUS_EOF:
+ g_debug("received EOF");
+ if (!s->virtio) {
+ return false;
+ }
case G_IO_STATUS_AGAIN:
/* virtio causes us to spin here when no process is attached to
* host-side chardev. sleep a bit to mitigate this
usleep(100*1000);
}
return true;
- case G_IO_STATUS_EOF:
- g_debug("received EOF");
- conn_channel_close(s);
- if (s->virtio) {
- return true;
- }
- return false;
default:
g_warning("unknown channel read status, closing");
- conn_channel_close(s);
return false;
}
return true;
}
-static int conn_channel_add(GAState *s, int fd)
+static gboolean channel_init(GAState *s, const gchar *method, const gchar *path)
{
- GIOChannel *conn_channel;
- GError *err = NULL;
+ GAChannelMethod channel_method;
- g_assert(s && !s->conn_channel);
- conn_channel = g_io_channel_unix_new(fd);
- g_assert(conn_channel);
- g_io_channel_set_encoding(conn_channel, NULL, &err);
- if (err != NULL) {
- g_warning("error setting channel encoding to binary");
- g_error_free(err);
- return -1;
+ if (method == NULL) {
+ method = "virtio-serial";
}
- g_io_add_watch(conn_channel, G_IO_IN | G_IO_HUP,
- conn_channel_read, s);
- s->conn_channel = conn_channel;
- return 0;
-}
-static gboolean listen_channel_accept(GIOChannel *channel,
- GIOCondition condition, gpointer data)
-{
- GAState *s = data;
- GError *err = NULL;
- g_assert(channel != NULL);
- int ret;
- bool accepted = false;
+ if (path == NULL) {
+ if (strcmp(method, "virtio-serial") != 0) {
+ g_critical("must specify a path for this channel");
+ return false;
+ }
+ /* try the default path for the virtio-serial port */
+ path = QGA_VIRTIO_PATH_DEFAULT;
+ }
- s->conn_sock = g_socket_accept(s->listen_sock, NULL, &err);
- if (err != NULL) {
- g_warning("error converting fd to gsocket: %s", err->message);
- g_error_free(err);
- goto out;
+ if (strcmp(method, "virtio-serial") == 0) {
+ s->virtio = true; /* virtio requires special handling in some cases */
+ channel_method = GA_CHANNEL_VIRTIO_SERIAL;
+ } else if (strcmp(method, "isa-serial") == 0) {
+ channel_method = GA_CHANNEL_ISA_SERIAL;
+ } else if (strcmp(method, "unix-listen") == 0) {
+ channel_method = GA_CHANNEL_UNIX_LISTEN;
+ } else {
+ g_critical("unsupported channel method/type: %s", method);
+ return false;
}
- ret = conn_channel_add(s, g_socket_get_fd(s->conn_sock));
- if (ret) {
- g_warning("error setting up connection");
- goto out;
+
+ s->channel = ga_channel_new(channel_method, path, channel_event_cb, s);
+ if (!s->channel) {
+ g_critical("failed to create guest agent channel");
+ return false;
}
- accepted = true;
-out:
- /* only accept 1 connection at a time */
- return !accepted;
+ return true;
}
-/* start polling for readable events on listen fd, new==true
- * indicates we should use the existing s->listen_channel
- */
-static int listen_channel_add(GAState *s, int listen_fd, bool new)
+#ifdef _WIN32
+DWORD WINAPI service_ctrl_handler(DWORD ctrl, DWORD type, LPVOID data,
+ LPVOID ctx)
{
- GError *err = NULL;
+ 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;
- if (new) {
- s->listen_channel = g_io_channel_unix_new(listen_fd);
- if (s->listen_sock) {
- g_object_unref(s->listen_sock);
- }
- s->listen_sock = g_socket_new_from_fd(listen_fd, &err);
- if (err != NULL) {
- g_warning("error converting fd to gsocket: %s", err->message);
- g_error_free(err);
- return -1;
- }
+ default:
+ ret = ERROR_CALL_NOT_IMPLEMENTED;
}
- g_io_add_watch(s->listen_channel, G_IO_IN,
- listen_channel_accept, s);
- return 0;
+ return ret;
}
-/* cleanup state for closed connection/session, start accepting new
- * connections if we're in listening mode
- */
-static void conn_channel_close(GAState *s)
+VOID WINAPI service_main(DWORD argc, TCHAR *argv[])
{
- if (strcmp(s->method, "unix-listen") == 0) {
- g_io_channel_shutdown(s->conn_channel, true, NULL);
- g_object_unref(s->conn_sock);
- s->conn_sock = NULL;
- listen_channel_add(s, 0, false);
- } else if (strcmp(s->method, "virtio-serial") == 0) {
- /* we spin on EOF for virtio-serial, so back off a bit. also,
- * dont close the connection in this case, it'll resume normal
- * operation when another process connects to host chardev
- */
- usleep(100*1000);
- goto out_noclose;
- }
- g_io_channel_unref(s->conn_channel);
- s->conn_channel = NULL;
-out_noclose:
- return;
-}
+ GAService *service = &ga_state->service;
-static void init_guest_agent(GAState *s)
-{
- struct termios tio;
- int ret, fd;
+ service->status_handle = RegisterServiceCtrlHandlerEx(QGA_SERVICE_NAME,
+ service_ctrl_handler, NULL);
- if (s->method == NULL) {
- /* try virtio-serial as our default */
- s->method = "virtio-serial";
+ if (service->status_handle == 0) {
+ g_critical("Failed to register extended requests function!\n");
+ return;
}
- if (s->path == NULL) {
- if (strcmp(s->method, "virtio-serial") != 0) {
- g_critical("must specify a path for this channel");
- exit(EXIT_FAILURE);
- }
- /* try the default path for the virtio-serial port */
- s->path = QGA_VIRTIO_PATH_DEFAULT;
- }
+ 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);
- if (strcmp(s->method, "virtio-serial") == 0) {
- s->virtio = true;
- fd = qemu_open(s->path, O_RDWR | O_NONBLOCK | O_ASYNC);
- if (fd == -1) {
- g_critical("error opening channel: %s", strerror(errno));
- exit(EXIT_FAILURE);
- }
- ret = conn_channel_add(s, fd);
- if (ret) {
- g_critical("error adding channel to main loop");
- exit(EXIT_FAILURE);
- }
- } else if (strcmp(s->method, "isa-serial") == 0) {
- fd = qemu_open(s->path, O_RDWR | O_NOCTTY);
- if (fd == -1) {
- g_critical("error opening channel: %s", strerror(errno));
- exit(EXIT_FAILURE);
- }
- tcgetattr(fd, &tio);
- /* set up serial port for non-canonical, dumb byte streaming */
- tio.c_iflag &= ~(IGNBRK | BRKINT | IGNPAR | PARMRK | INPCK | ISTRIP |
- INLCR | IGNCR | ICRNL | IXON | IXOFF | IXANY |
- IMAXBEL);
- tio.c_oflag = 0;
- tio.c_lflag = 0;
- tio.c_cflag |= QGA_BAUDRATE_DEFAULT;
- /* 1 available byte min or reads will block (we'll set non-blocking
- * elsewhere, else we have to deal with read()=0 instead)
- */
- tio.c_cc[VMIN] = 1;
- tio.c_cc[VTIME] = 0;
- /* flush everything waiting for read/xmit, it's garbage at this point */
- tcflush(fd, TCIFLUSH);
- tcsetattr(fd, TCSANOW, &tio);
- ret = conn_channel_add(s, fd);
- if (ret) {
- g_error("error adding channel to main loop");
- }
- } else if (strcmp(s->method, "unix-listen") == 0) {
- fd = unix_listen(s->path, NULL, strlen(s->path));
- if (fd == -1) {
- g_critical("error opening path: %s", strerror(errno));
- exit(EXIT_FAILURE);
- }
- ret = listen_channel_add(s, fd, true);
- if (ret) {
- g_critical("error binding/listening to specified socket");
- exit(EXIT_FAILURE);
- }
- } else {
- g_critical("unsupported channel method/type: %s", s->method);
- exit(EXIT_FAILURE);
- }
+ g_main_loop_run(ga_state->main_loop);
- json_message_parser_init(&s->parser, process_event);
- s->main_loop = g_main_loop_new(NULL, false);
+ 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:";
- const char *method = NULL, *path = NULL, *pidfile = QGA_PIDFILE_DEFAULT;
+ const char *sopt = "hVvdm:p:l:f:b:s:t:";
+ const char *method = NULL, *path = NULL;
+ const char *log_filepath = NULL;
+ const char *pid_filepath = QGA_PIDFILE_DEFAULT;
+ const char *state_dir = QGA_STATEDIR_DEFAULT;
+#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", 1, NULL, 'b' },
+#ifdef _WIN32
+ { "service", 1, NULL, 's' },
+#endif
+ { "statedir", 1, NULL, 't' },
{ NULL, 0, NULL, 0 }
};
- int opt_ind = 0, ch, daemonize = 0;
+ int opt_ind = 0, ch, daemonize = 0, i, j, len;
GLogLevelFlags log_level = G_LOG_LEVEL_ERROR | G_LOG_LEVEL_CRITICAL;
- FILE *log_file = stderr;
+ GList *blacklist = NULL;
GAState *s;
+ module_call_init(MODULE_INIT_QAPI);
+
while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) {
switch (ch) {
case 'm':
path = optarg;
break;
case 'l':
- log_file = fopen(optarg, "a");
- if (!log_file) {
- g_critical("unable to open specified log file: %s",
- strerror(errno));
- return EXIT_FAILURE;
- }
+ log_filepath = optarg;
break;
case 'f':
- pidfile = optarg;
+ pid_filepath = optarg;
break;
+ case 't':
+ state_dir = optarg;
+ break;
case 'v':
/* enable all log levels */
log_level = G_LOG_LEVEL_MASK;
break;
case 'V':
- printf("QEMU Guest Agent %s\n", QGA_VERSION);
+ printf("QEMU Guest Agent %s\n", QEMU_VERSION);
return 0;
case 'd':
daemonize = 1;
break;
+ case 'b': {
+ char **list_head, **list;
+ if (*optarg == '?') {
+ list_head = list = qmp_get_command_list();
+ while (*list != NULL) {
+ printf("%s\n", *list);
+ g_free(*list);
+ list++;
+ }
+ g_free(list_head);
+ return 0;
+ }
+ for (j = 0, i = 0, len = strlen(optarg); i < len; i++) {
+ if (optarg[i] == ',') {
+ optarg[i] = 0;
+ blacklist = g_list_append(blacklist, &optarg[j]);
+ j = i + 1;
+ }
+ }
+ if (j < i) {
+ blacklist = g_list_append(blacklist, &optarg[j]);
+ }
+ break;
+ }
+#ifdef _WIN32
+ case 's':
+ service = optarg;
+ if (strcmp(service, "install") == 0) {
+ return ga_install_service(path, log_filepath);
+ } 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;
}
}
- if (daemonize) {
- g_debug("starting daemon");
- become_daemon(pidfile);
- }
-
- g_type_init();
- g_thread_init(NULL);
-
- s = qemu_mallocz(sizeof(GAState));
- s->conn_channel = NULL;
- s->path = path;
- s->method = method;
- s->log_file = log_file;
+ s = g_malloc0(sizeof(GAState));
s->log_level = log_level;
+ s->log_file = stderr;
g_log_set_default_handler(ga_log, s);
g_log_set_fatal_mask(NULL, G_LOG_LEVEL_ERROR);
- s->logging_enabled = true;
+ ga_enable_logging(s);
+ s->state_filepath_isfrozen = g_strdup_printf("%s/qga.state.isfrozen",
+ state_dir);
+ s->frozen = false;
+#ifndef _WIN32
+ /* check if a previous instance of qemu-ga exited with filesystems' state
+ * marked as frozen. this could be a stale value (a non-qemu-ga process
+ * or reboot may have since unfrozen them), but better to require an
+ * uneeded unfreeze than to risk hanging on start-up
+ */
+ struct stat st;
+ if (stat(s->state_filepath_isfrozen, &st) == -1) {
+ /* it's okay if the file doesn't exist, but if we can't access for
+ * some other reason, such as permissions, there's a configuration
+ * that needs to be addressed. so just bail now before we get into
+ * more trouble later
+ */
+ if (errno != ENOENT) {
+ g_critical("unable to access state file at path %s: %s",
+ s->state_filepath_isfrozen, strerror(errno));
+ return EXIT_FAILURE;
+ }
+ } else {
+ g_warning("previous instance appears to have exited with frozen"
+ " filesystems. deferring logging/pidfile creation and"
+ " disabling non-fsfreeze-safe commands until"
+ " guest-fsfreeze-thaw is issued, or filesystems are"
+ " manually unfrozen and the file %s is removed",
+ s->state_filepath_isfrozen);
+ s->frozen = true;
+ }
+#endif
+
+ if (ga_is_frozen(s)) {
+ if (daemonize) {
+ /* delay opening/locking of pidfile till filesystem are unfrozen */
+ s->deferred_options.pid_filepath = pid_filepath;
+ become_daemon(NULL);
+ }
+ if (log_filepath) {
+ /* delay opening the log file till filesystems are unfrozen */
+ s->deferred_options.log_filepath = log_filepath;
+ }
+ ga_disable_logging(s);
+ ga_disable_non_whitelisted();
+ } else {
+ if (daemonize) {
+ become_daemon(pid_filepath);
+ }
+ if (log_filepath) {
+ FILE *log_file = fopen(log_filepath, "a");
+ if (!log_file) {
+ g_critical("unable to open specified log file: %s",
+ strerror(errno));
+ goto out_bad;
+ }
+ s->log_file = log_file;
+ }
+ }
+
+ if (blacklist) {
+ s->blacklist = blacklist;
+ do {
+ g_debug("disabling command: %s", (char *)blacklist->data);
+ qmp_disable_command(blacklist->data);
+ blacklist = g_list_next(blacklist);
+ } while (blacklist);
+ }
s->command_state = ga_command_state_new();
ga_command_state_init(s, s->command_state);
ga_command_state_init_all(s->command_state);
+ json_message_parser_init(&s->parser, process_event);
ga_state = s;
+#ifndef _WIN32
+ if (!register_signal_handlers()) {
+ g_critical("failed to register signal handlers");
+ goto out_bad;
+ }
+#endif
- module_call_init(MODULE_INIT_QAPI);
- init_guest_agent(ga_state);
- register_signal_handlers();
-
+ s->main_loop = g_main_loop_new(NULL, false);
+ if (!channel_init(ga_state, method, path)) {
+ 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);
- unlink(pidfile);
+ ga_channel_free(ga_state->channel);
+ if (daemonize) {
+ unlink(pid_filepath);
+ }
return 0;
+
+out_bad:
+ if (daemonize) {
+ unlink(pid_filepath);
+ }
+ return EXIT_FAILURE;
}
projects / qemu.git / blobdiff