/*!
* \internal
* \brief Send a method to systemd without arguments, and wait for reply
*
* \param[in] method Method to send
*
* \return Systemd reply on success, NULL (and error will be logged) otherwise
*
* \note The caller must call dbus_message_unref() on the reply after
* handling it.
*/
static DBusMessage *
systemd_call_simple_method(const char *method)
{
DBusMessage *msg = systemd_new_method(method);
DBusMessage *reply = NULL;
DBusError error;
/* Don't call systemd_init() here, because that calls this */
CRM_CHECK(systemd_proxy, return NULL);
if (msg == NULL) {
crm_err("Could not create message to send %s to systemd", method);
return NULL;
}
dbus_error_init(&error);
reply = systemd_send_recv(msg, &error, DBUS_TIMEOUT_USE_DEFAULT);
dbus_message_unref(msg);
if (dbus_error_is_set(&error)) {
crm_err("Could not send %s to systemd: %s (%s)",
method, error.message, error.name);
dbus_error_free(&error);
return NULL;
} else if (reply == NULL) {
crm_err("Could not send %s to systemd: no reply received", method);
return NULL;
}
return reply;
}
static char *
systemd_unit_by_name(const gchar * arg_name, svc_action_t *op)
{
DBusMessage *msg;
DBusMessage *reply = NULL;
DBusPendingCall* pending = NULL;
char *name = NULL;
/*
Equivalent to GetUnit if its already loaded
<method name="LoadUnit">
<arg name="name" type="s" direction="in"/>
<arg name="unit" type="o" direction="out"/>
</method>
*/
if (systemd_init() == FALSE) {
return FALSE;
}
msg = systemd_new_method(BUS_NAME".Manager", "LoadUnit");
CRM_ASSERT(msg != NULL);
name = systemd_service_name(arg_name);
CRM_LOG_ASSERT(dbus_message_append_args(msg, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID));
free(name);
if(op == NULL || op->synchronous) {
const char *unit = NULL;
char *munit = NULL;
DBusError error;
dbus_error_init(&error);
reply = pcmk_dbus_send_recv(msg, systemd_proxy, &error, op? op->timeout : DBUS_TIMEOUT_USE_DEFAULT);
dbus_message_unref(msg);
unit = systemd_loadunit_result(reply, op);
if(unit) {
munit = strdup(unit);
}
if(reply) {
dbus_message_unref(reply);
}
return munit;
}
pending = pcmk_dbus_send(msg, systemd_proxy, systemd_loadunit_cb, op, op->timeout);
if(pending) {
services_set_op_pending(op, pending);
}
dbus_message_unref(msg);
return NULL;
}
static bool
systemd_daemon_reload(int timeout)
{
static unsigned int reload_count = 0;
DBusMessage *msg = systemd_new_method("Reload");
reload_count++;
CRM_ASSERT(msg != NULL);
systemd_send(msg, systemd_daemon_reload_complete,
GUINT_TO_POINTER(reload_count), timeout);
dbus_message_unref(msg);
return TRUE;
}
static bool
systemd_daemon_reload(void)
{
/* TODO: Make this asynchronous */
const char *method = "Reload";
DBusMessage *reply = NULL;
DBusMessage *msg = systemd_new_method(BUS_NAME".Manager", method);
CRM_ASSERT(msg != NULL);
reply = pcmk_dbus_send_recv(msg, systemd_proxy, NULL);
dbus_message_unref(msg);
if(reply) {
dbus_message_unref(reply);
}
return TRUE;
}
static bool
systemd_daemon_reload(int timeout)
{
static unsigned int reload_count = 0;
const char *method = "Reload";
reload_count++;
if(reload_count % 10 == 0) {
DBusMessage *msg = systemd_new_method(BUS_NAME".Manager", method);
CRM_ASSERT(msg != NULL);
pcmk_dbus_send(msg, systemd_proxy, systemd_daemon_reload_complete, GUINT_TO_POINTER(reload_count), timeout);
dbus_message_unref(msg);
}
return TRUE;
}
GList *
systemd_unit_listall(void)
{
int lpc = 0;
GList *units = NULL;
DBusMessageIter args;
DBusMessageIter unit;
DBusMessageIter elem;
DBusMessage *msg = NULL;
DBusMessage *reply = NULL;
const char *method = "ListUnits";
DBusError error;
if (systemd_init() == FALSE) {
return NULL;
}
/*
" <method name=\"ListUnits\">\n" \
" <arg name=\"units\" type=\"a(ssssssouso)\" direction=\"out\"/>\n" \
" </method>\n" \
*/
dbus_error_init(&error);
msg = systemd_new_method(BUS_NAME".Manager", method);
CRM_ASSERT(msg != NULL);
reply = pcmk_dbus_send_recv(msg, systemd_proxy, &error, DBUS_TIMEOUT_USE_DEFAULT);
dbus_message_unref(msg);
if(error.name) {
crm_err("Call to %s failed: %s", method, error.name);
return NULL;
} else if (reply == NULL) {
crm_err("Call to %s failed: Message has no reply", method);
return NULL;
} else if (!dbus_message_iter_init(reply, &args)) {
crm_err("Call to %s failed: Message has no arguments", method);
dbus_message_unref(reply);
return NULL;
}
if(!pcmk_dbus_type_check(reply, &args, DBUS_TYPE_ARRAY, __FUNCTION__, __LINE__)) {
crm_err("Call to %s failed: Message has invalid arguments", method);
dbus_message_unref(reply);
return NULL;
}
dbus_message_iter_recurse(&args, &unit);
while (dbus_message_iter_get_arg_type (&unit) != DBUS_TYPE_INVALID) {
DBusBasicValue value;
if(!pcmk_dbus_type_check(reply, &unit, DBUS_TYPE_STRUCT, __FUNCTION__, __LINE__)) {
continue;
}
dbus_message_iter_recurse(&unit, &elem);
if(!pcmk_dbus_type_check(reply, &elem, DBUS_TYPE_STRING, __FUNCTION__, __LINE__)) {
continue;
}
dbus_message_iter_get_basic(&elem, &value);
crm_trace("Got: %s", value.str);
if(value.str) {
char *match = strstr(value.str, ".service");
if (match) {
lpc++;
match[0] = 0;
units = g_list_append(units, strdup(value.str));
}
}
dbus_message_iter_next (&unit);
}
dbus_message_unref(reply);
crm_trace("Found %d systemd services", lpc);
return units;
}
gboolean
systemd_unit_exec_with_unit(svc_action_t * op, const char *unit)
{
const char *method = op->action;
DBusMessage *msg = NULL;
DBusMessage *reply = NULL;
CRM_ASSERT(unit);
if (unit == NULL) {
crm_debug("Could not obtain unit named '%s'", op->agent);
op->rc = PCMK_OCF_NOT_INSTALLED;
op->status = PCMK_LRM_OP_NOT_INSTALLED;
goto cleanup;
}
if (safe_str_eq(op->action, "monitor") || safe_str_eq(method, "status")) {
char *state = pcmk_dbus_get_property(systemd_proxy, BUS_NAME, unit, BUS_NAME ".Unit", "ActiveState",
op->synchronous?NULL:systemd_unit_check, op);
if (op->synchronous) {
systemd_unit_check("ActiveState", state, op);
free(state);
return op->rc == PCMK_OCF_OK;
}
return TRUE;
} else if (g_strcmp0(method, "start") == 0) {
FILE *file_strm = NULL;
char *override_dir = g_strdup_printf("%s/%s", SYSTEMD_OVERRIDE_ROOT, unit);
char *override_file = g_strdup_printf("%s/%s/50-pacemaker.conf", SYSTEMD_OVERRIDE_ROOT, unit);
method = "StartUnit";
crm_build_path(override_dir, 0755);
file_strm = fopen(override_file, "w");
if (file_strm != NULL) {
int rc = fprintf(file_strm, "[Service]\nRestart=no");
if (rc < 0) {
crm_perror(LOG_ERR, "Cannot write to systemd override file %s", override_file);
}
} else {
crm_err("Cannot open systemd override file %s for writing", override_file);
}
if (file_strm != NULL) {
fflush(file_strm);
fclose(file_strm);
}
systemd_daemon_reload();
free(override_file);
free(override_dir);
} else if (g_strcmp0(method, "stop") == 0) {
char *override_file = g_strdup_printf("%s/%s/50-pacemaker.conf", SYSTEMD_OVERRIDE_ROOT, unit);
method = "StopUnit";
unlink(override_file);
free(override_file);
systemd_daemon_reload();
} else if (g_strcmp0(method, "restart") == 0) {
method = "RestartUnit";
} else {
op->rc = PCMK_OCF_UNIMPLEMENT_FEATURE;
goto cleanup;
}
crm_debug("Calling %s for %s: %s", method, op->rsc, unit);
msg = systemd_new_method(BUS_NAME".Manager", method);
CRM_ASSERT(msg != NULL);
/* (ss) */
{
const char *replace_s = "replace";
char *name = systemd_service_name(op->agent);
CRM_LOG_ASSERT(dbus_message_append_args(msg, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID));
CRM_LOG_ASSERT(dbus_message_append_args(msg, DBUS_TYPE_STRING, &replace_s, DBUS_TYPE_INVALID));
free(name);
}
if (op->synchronous == FALSE) {
return pcmk_dbus_send(msg, systemd_proxy, systemd_async_dispatch, op);
} else {
DBusError error;
reply = pcmk_dbus_send_recv(msg, systemd_proxy, &error);
systemd_exec_result(reply, op);
if(reply) {
dbus_message_unref(reply);
}
}
if(msg) {
dbus_message_unref(msg);
}
cleanup:
if (op->synchronous == FALSE) {
operation_finalize(op);
return TRUE;
}
return op->rc == PCMK_OCF_OK;
}