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diff --git a/lib/services/systemd.c b/lib/services/systemd.c
index a8bf1b4588..c86bb0aadc 100644
--- a/lib/services/systemd.c
+++ b/lib/services/systemd.c
@@ -1,665 +1,666 @@
/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Copyright (C) 2012 Andrew Beekhof <andrew@beekhof.net>
*/
#include <crm_internal.h>
#include <crm/crm.h>
#include <crm/services.h>
#include <crm/common/mainloop.h>
#include <gio/gio.h>
#include <services_private.h>
#include <systemd.h>
#include <dbus/dbus.h>
#include <pcmk-dbus.h>
#define BUS_NAME "org.freedesktop.systemd1"
#define BUS_PATH "/org/freedesktop/systemd1"
#define BUS_PROPERTY_IFACE "org.freedesktop.DBus.Properties"
/*
/usr/share/dbus-1/interfaces/org.freedesktop.systemd1.Manager.xml
*/
gboolean
systemd_unit_exec_with_unit(svc_action_t * op, const char *unit);
struct unit_info {
const char *id;
const char *description;
const char *load_state;
const char *active_state;
const char *sub_state;
const char *following;
const char *unit_path;
uint32_t job_id;
const char *job_type;
const char *job_path;
};
struct pcmk_dbus_data
{
char *name;
char *unit;
DBusError error;
svc_action_t *op;
void (*callback)(DBusMessage *reply, svc_action_t *op);
};
static DBusMessage *systemd_new_method(const char *iface, const char *method)
{
crm_trace("Calling: %s on %s", method, iface);
return dbus_message_new_method_call(BUS_NAME, // target for the method call
BUS_PATH, // object to call on
iface, // interface to call on
method); // method name
}
static DBusConnection* systemd_proxy = NULL;
static gboolean
systemd_init(void)
{
static int need_init = 1;
/* http://dbus.freedesktop.org/doc/api/html/group__DBusConnection.html */
if (need_init) {
need_init = 0;
systemd_proxy = pcmk_dbus_connect();
}
if (systemd_proxy == NULL) {
return FALSE;
}
return TRUE;
}
void
systemd_cleanup(void)
{
if (systemd_proxy) {
pcmk_dbus_disconnect(systemd_proxy);
systemd_proxy = NULL;
}
}
static char *
systemd_service_name(const char *name)
{
if (name == NULL) {
return NULL;
} else if (strstr(name, ".service")) {
return strdup(name);
}
return g_strdup_printf("%s.service", name);
}
static void
systemd_daemon_reload_complete(DBusPendingCall *pending, void *user_data)
{
DBusError error;
DBusMessage *reply = NULL;
unsigned int reload_count = GPOINTER_TO_UINT(user_data);
dbus_error_init(&error);
if(pending) {
reply = dbus_pending_call_steal_reply(pending);
}
if(pcmk_dbus_find_error("Reload", pending, reply, &error)) {
crm_err("Could not issue systemd reload %d: %s", reload_count, error.message);
} else {
crm_trace("Reload %d complete", reload_count);
}
if(pending) {
dbus_pending_call_unref(pending);
}
if(reply) {
dbus_message_unref(reply);
}
}
static bool
systemd_daemon_reload(void)
{
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));
dbus_message_unref(msg);
}
return TRUE;
}
static const char *
systemd_loadunit_result(DBusMessage *reply, svc_action_t * op)
{
const char *path = NULL;
if(pcmk_dbus_find_error("LoadUnit", (void*)&path, reply, NULL)) {
if(op) {
crm_warn("No unit found for %s", op->rsc);
}
} else if(pcmk_dbus_type_check(reply, NULL, DBUS_TYPE_OBJECT_PATH, __FUNCTION__, __LINE__)) {
dbus_message_get_args (reply, NULL,
DBUS_TYPE_OBJECT_PATH, &path,
DBUS_TYPE_INVALID);
}
if(op) {
systemd_unit_exec_with_unit(op, path);
}
return path;
}
static void
systemd_loadunit_cb(DBusPendingCall *pending, void *user_data)
{
DBusMessage *reply = NULL;
svc_action_t * op = user_data;
if(pending) {
reply = dbus_pending_call_steal_reply(pending);
}
if(op) {
crm_trace("Got result: %p for %p for %s, %s", reply, pending, op->rsc, op->action);
} else {
crm_trace("Got result: %p for %p", reply, pending);
}
systemd_loadunit_result(reply, user_data);
if(pending) {
dbus_pending_call_unref(pending);
}
if(reply) {
dbus_message_unref(reply);
}
}
static char *
systemd_unit_by_name(const gchar * arg_name, svc_action_t *op)
{
DBusMessage *msg;
DBusMessage *reply = 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);
dbus_message_unref(msg);
unit = systemd_loadunit_result(reply, op);
if(unit) {
munit = strdup(unit);
}
if(reply) {
dbus_message_unref(reply);
}
return munit;
}
pcmk_dbus_send(msg, systemd_proxy, systemd_loadunit_cb, op);
dbus_message_unref(msg);
return NULL;
}
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_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_exists(const char *name)
{
char *unit = NULL;
/* Note: Makes a blocking dbus calls
* Used by resources_find_service_class() when resource class=service
*/
unit = systemd_unit_by_name(name, NULL);
if(unit) {
free(unit);
return TRUE;
}
return FALSE;
}
static char *
systemd_unit_metadata(const char *name)
{
char *meta = NULL;
char *desc = NULL;
char *path = systemd_unit_by_name(name, NULL);
if (path) {
/* TODO: Worth a making blocking call for? Probably not. Possibly if cached. */
desc = pcmk_dbus_get_property(systemd_proxy, BUS_NAME, path, BUS_NAME ".Unit", "Description", NULL, NULL);
} else {
desc = g_strdup_printf("Systemd unit file for %s", name);
}
meta = g_strdup_printf("<?xml version=\"1.0\"?>\n"
"<!DOCTYPE resource-agent SYSTEM \"ra-api-1.dtd\">\n"
"<resource-agent name=\"%s\" version=\"0.1\">\n"
" <version>1.0</version>\n"
" <longdesc lang=\"en\">\n"
" %s\n"
" </longdesc>\n"
" <shortdesc lang=\"en\">systemd unit file for %s</shortdesc>\n"
" <parameters>\n"
" </parameters>\n"
" <actions>\n"
" <action name=\"start\" timeout=\"15\" />\n"
" <action name=\"stop\" timeout=\"15\" />\n"
" <action name=\"status\" timeout=\"15\" />\n"
" <action name=\"restart\" timeout=\"15\" />\n"
" <action name=\"monitor\" timeout=\"15\" interval=\"15\" start-delay=\"15\" />\n"
" <action name=\"meta-data\" timeout=\"5\" />\n"
" </actions>\n"
" <special tag=\"systemd\">\n"
" </special>\n" "</resource-agent>\n", name, desc, name);
free(desc);
free(path);
return meta;
}
static bool
systemd_mask_error(svc_action_t *op, const char *error)
{
crm_trace("Could not issue %s for %s: %s", op->action, op->rsc, error);
if(strstr(error, "org.freedesktop.systemd1.InvalidName")
|| strstr(error, "org.freedesktop.systemd1.LoadFailed")
|| strstr(error, "org.freedesktop.systemd1.NoSuchUnit")) {
if (safe_str_eq(op->action, "stop")) {
crm_trace("Masking %s failure for %s: unknown services are stopped", op->action, op->rsc);
op->rc = PCMK_OCF_OK;
} else {
crm_trace("Mapping %s failure for %s: unknown services are not installed", op->action, op->rsc);
op->rc = PCMK_OCF_NOT_INSTALLED;
op->status = PCMK_LRM_OP_NOT_INSTALLED;
}
return TRUE;
}
return FALSE;
}
static void
systemd_exec_result(DBusMessage *reply, svc_action_t *op)
{
DBusError error;
if(pcmk_dbus_find_error(op->action, (void*)&error, reply, &error)) {
/* ignore "already started" or "not running" errors */
if (!systemd_mask_error(op, error.name)) {
crm_err("Could not issue %s for %s: %s (%s)", op->action, op->rsc, error.message);
}
} else {
if(!pcmk_dbus_type_check(reply, NULL, DBUS_TYPE_OBJECT_PATH, __FUNCTION__, __LINE__)) {
crm_warn("Call to %s passed but return type was unexpected", op->action);
op->rc = PCMK_OCF_OK;
} else {
const char *path = NULL;
dbus_message_get_args (reply, NULL,
DBUS_TYPE_OBJECT_PATH, &path,
DBUS_TYPE_INVALID);
crm_info("Call to %s passed: %s", op->action, path);
op->rc = PCMK_OCF_OK;
}
}
operation_finalize(op);
}
static void
systemd_async_dispatch(DBusPendingCall *pending, void *user_data)
{
DBusError error;
DBusMessage *reply = NULL;
svc_action_t *op = user_data;
dbus_error_init(&error);
if(pending) {
reply = dbus_pending_call_steal_reply(pending);
}
if(op) {
crm_trace("Got result: %p for %p for %s, %s", reply, pending, op->rsc, op->action);
op->opaque->pending = NULL;
+ systemd_exec_result(reply, op);
+
} else {
crm_trace("Got result: %p for %p", reply, pending);
}
- systemd_exec_result(reply, op);
if(pending) {
dbus_pending_call_unref(pending);
}
if(reply) {
dbus_message_unref(reply);
}
}
#define SYSTEMD_OVERRIDE_ROOT "/run/systemd/system/"
static void
systemd_unit_check(const char *name, const char *state, void *userdata)
{
svc_action_t * op = userdata;
crm_trace("Resource %s has %s='%s'", op->rsc, name, state);
if(state == NULL) {
op->rc = PCMK_OCF_NOT_RUNNING;
} else if (g_strcmp0(state, "active") == 0) {
op->rc = PCMK_OCF_OK;
} else if (g_strcmp0(state, "activating") == 0) {
op->rc = PCMK_OCF_PENDING;
} else {
op->rc = PCMK_OCF_NOT_RUNNING;
}
if (op->synchronous == FALSE) {
op->opaque->pending = NULL;
operation_finalize(op);
}
}
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) {
DBusPendingCall* pending = pcmk_dbus_send(msg, systemd_proxy, systemd_async_dispatch, op);
dbus_message_unref(msg);
if(pending) {
dbus_pending_call_ref(pending);
op->opaque->pending = pending;
return TRUE;
}
return FALSE;
} else {
DBusError error;
reply = pcmk_dbus_send_recv(msg, systemd_proxy, &error);
dbus_message_unref(msg);
systemd_exec_result(reply, op);
if(reply) {
dbus_message_unref(reply);
}
return FALSE;
}
cleanup:
if (op->synchronous == FALSE) {
operation_finalize(op);
return TRUE;
}
return op->rc == PCMK_OCF_OK;
}
static gboolean
systemd_timeout_callback(gpointer p)
{
svc_action_t * op = p;
op->opaque->timerid = 0;
crm_warn("%s operation on systemd unit %s named '%s' timed out", op->action, op->agent, op->rsc);
operation_finalize(op);
return FALSE;
}
gboolean
systemd_unit_exec(svc_action_t * op)
{
char *unit = NULL;
CRM_ASSERT(op);
CRM_ASSERT(systemd_init());
op->rc = PCMK_OCF_UNKNOWN_ERROR;
crm_debug("Performing %ssynchronous %s op on systemd unit %s named '%s'",
op->synchronous ? "" : "a", op->action, op->agent, op->rsc);
if (safe_str_eq(op->action, "meta-data")) {
/* TODO: See if we can teach the lrmd not to make these calls synchronously */
op->stdout_data = systemd_unit_metadata(op->agent);
op->rc = PCMK_OCF_OK;
if (op->synchronous == FALSE) {
operation_finalize(op);
}
return TRUE;
}
unit = systemd_unit_by_name(op->agent, op);
free(unit);
if (op->synchronous == FALSE) {
op->opaque->timerid = g_timeout_add(op->timeout + 5000, systemd_timeout_callback, op);
return TRUE;
}
return op->rc == PCMK_OCF_OK;
}

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