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ifcfg-rh: provide an easy way to get connection UUID/path for tools

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ifup/ifdown, nmcli, and possibly other tools need a way to get the
internally generated connection UUID and possibly it's path given
just the ifcfg file path.  Not all ifcfg files have the UUID in
the file, so ifcfg-rh generates one.  But external tools don't know
what that UUID is or what the logic that NM uses to generate it is.

Help them out a bit so that ifup/ifdown can easily poke NM given
just the ifcfg file.
This commit is contained in:
Dan Williams
2010-02-17 16:43:03 -08:00
parent 95da6625b7
commit d0f5c92ed9
4 changed files with 185 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

124
system-settings/plugins/ifcfg-rh/plugin.c
View File

@@ -33,7 +33,9 @@
#include <glib/gi18n.h>
#include <gio/gio.h>
#include <dbus/dbus.h>
#include <dbus/dbus-glib.h>
#include <dbus/dbus-glib-lowlevel.h>
#include <nm-setting-connection.h>
@@ -47,6 +49,17 @@
#include "writer.h"
#include "utils.h"
#define DBUS_SERVICE_NAME "com.redhat.ifcfgrh1"
#define DBUS_OBJECT_PATH "/com/redhat/ifcfgrh1"
static gboolean impl_ifcfgrh_get_ifcfg_details (SCPluginIfcfg *plugin,
const char *in_ifcfg,
const char **out_uuid,
const char **out_path,
GError **error);
#include "nm-ifcfg-rh-glue.h"
static void system_config_interface_init (NMSystemConfigInterface *system_config_interface_class);
static void connection_changed_handler (SCPluginIfcfg *plugin,
@@ -77,6 +90,8 @@ typedef struct {
GFileMonitor *monitor;
guint monitor_id;
DBusGConnection *bus;
} SCPluginIfcfgPrivate;
@@ -506,6 +521,54 @@ sc_network_changed_cb (NMInotifyHelper *ih,
g_free (new_hostname);
}
static gboolean
impl_ifcfgrh_get_ifcfg_details (SCPluginIfcfg *plugin,
const char *in_ifcfg,
const char **out_uuid,
const char **out_path,
GError **error)
{
SCPluginIfcfgPrivate *priv = SC_PLUGIN_IFCFG_GET_PRIVATE (plugin);
NMIfcfgConnection *connection;
NMSettingConnection *s_con;
const char *uuid;
const char *path;
if (!g_path_is_absolute (in_ifcfg)) {
g_set_error (error, 0, 0, "ifcfg path '%s' is not absolute", in_ifcfg);
return FALSE;
}
connection = g_hash_table_lookup (priv->connections, in_ifcfg);
if (!connection) {
g_set_error (error, 0, 0, "ifcfg file '%s' unknown", in_ifcfg);
return FALSE;
}
s_con = (NMSettingConnection *) nm_connection_get_setting (NM_CONNECTION (connection), NM_TYPE_SETTING_CONNECTION);
if (!s_con) {
g_set_error_literal (error, 0, 0, "unable to retrieve the connection setting");
return FALSE;
}
uuid = nm_setting_connection_get_uuid (s_con);
if (!uuid) {
g_set_error_literal (error, 0, 0, "unable to get the UUID");
return FALSE;
}
path = nm_connection_get_path (NM_CONNECTION (connection));
if (!path) {
g_set_error_literal (error, 0, 0, "unable to get the connection D-Bus path");
return FALSE;
}
*out_uuid = uuid;
*out_path = path;
return TRUE;
}
static void
init (NMSystemConfigInterface *config)
{
@@ -516,12 +579,52 @@ sc_plugin_ifcfg_init (SCPluginIfcfg *plugin)
{
SCPluginIfcfgPrivate *priv = SC_PLUGIN_IFCFG_GET_PRIVATE (plugin);
NMInotifyHelper *ih;
GError *error = NULL;
gboolean success = FALSE;
ih = nm_inotify_helper_get ();
priv->ih_event_id = g_signal_connect (ih, "event", G_CALLBACK (sc_network_changed_cb), plugin);
priv->sc_network_wd = nm_inotify_helper_add_watch (ih, SC_NETWORK_FILE);
priv->hostname = plugin_get_hostname (plugin);
priv->bus = dbus_g_bus_get (DBUS_BUS_SYSTEM, &error);
if (!priv->bus) {
PLUGIN_WARN (IFCFG_PLUGIN_NAME, "Couldn't connect to D-Bus: %s",
error->message);
g_clear_error (&error);
} else {
DBusConnection *tmp;
DBusGProxy *proxy;
int result;
tmp = dbus_g_connection_get_connection (priv->bus);
dbus_connection_set_exit_on_disconnect (tmp, FALSE);
proxy = dbus_g_proxy_new_for_name (priv->bus,
"org.freedesktop.DBus",
"/org/freedesktop/DBus",
"org.freedesktop.DBus");
if (!dbus_g_proxy_call (proxy, "RequestName", &error,
G_TYPE_STRING, DBUS_SERVICE_NAME,
G_TYPE_UINT, DBUS_NAME_FLAG_DO_NOT_QUEUE,
G_TYPE_INVALID,
G_TYPE_UINT, &result,
G_TYPE_INVALID)) {
PLUGIN_WARN (IFCFG_PLUGIN_NAME, "Couldn't acquire D-Bus service: %s",
error->message);
g_clear_error (&error);
} else if (result != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER) {
PLUGIN_WARN (IFCFG_PLUGIN_NAME, "Couldn't acquire ifcfgrh1 D-Bus service (already taken)");
} else
success = TRUE;
}
if (!success) {
dbus_g_connection_unref (priv->bus);
priv->bus = NULL;
}
}
static void
@@ -531,6 +634,11 @@ dispose (GObject *object)
SCPluginIfcfgPrivate *priv = SC_PLUGIN_IFCFG_GET_PRIVATE (plugin);
NMInotifyHelper *ih;
if (priv->bus) {
dbus_g_connection_unref (priv->bus);
priv->bus = NULL;
}
ih = nm_inotify_helper_get ();
g_signal_handler_disconnect (ih, priv->ih_event_id);
@@ -631,6 +739,9 @@ sc_plugin_ifcfg_class_init (SCPluginIfcfgClass *req_class)
g_object_class_override_property (object_class,
NM_SYSTEM_CONFIG_INTERFACE_PROP_HOSTNAME,
NM_SYSTEM_CONFIG_INTERFACE_HOSTNAME);
dbus_g_object_type_install_info (G_TYPE_FROM_CLASS (req_class),
&dbus_glib_nm_ifcfg_rh_object_info);
}
static void
@@ -647,10 +758,19 @@ G_MODULE_EXPORT GObject *
nm_system_config_factory (void)
{
static SCPluginIfcfg *singleton = NULL;
SCPluginIfcfgPrivate *priv;
if (!singleton)
if (!singleton) {
singleton = SC_PLUGIN_IFCFG (g_object_new (SC_TYPE_PLUGIN_IFCFG, NULL));
else
if (singleton) {
priv = SC_PLUGIN_IFCFG_GET_PRIVATE (singleton);
if (priv->bus)
dbus_g_connection_register_g_object (priv->bus,
DBUS_OBJECT_PATH,
G_OBJECT (singleton));
PLUGIN_PRINT (IFCFG_PLUGIN_NAME, "Acquired D-Bus service %s", DBUS_SERVICE_NAME);
}
} else
g_object_ref (singleton);
return G_OBJECT (singleton);