NetworkManager/libnm-core/nm-setting-team.c

/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/*
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301 USA.
 *
 * Copyright 2013 Jiri Pirko <jiri@resnulli.us>
 */

#include "nm-default.h"

#include <string.h>
#include <stdlib.h>

#include "nm-setting-team.h"
#include "nm-utils.h"
#include "nm-utils-private.h"
#include "nm-connection-private.h"
#include "nm-utils-private.h"

/**
 * SECTION:nm-setting-team
 * @short_description: Describes connection properties for teams
 *
 * The #NMSettingTeam object is a #NMSetting subclass that describes properties
 * necessary for team connections.
 **/

G_DEFINE_TYPE_WITH_CODE (NMSettingTeam, nm_setting_team, NM_TYPE_SETTING,
                         _nm_register_setting (TEAM, 1))
NM_SETTING_REGISTER_TYPE (NM_TYPE_SETTING_TEAM)

#define NM_SETTING_TEAM_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), NM_TYPE_SETTING_TEAM, NMSettingTeamPrivate))

typedef struct {
	char *config;
} NMSettingTeamPrivate;

enum {
	PROP_0,
	PROP_CONFIG,
	LAST_PROP
};

/**
 * nm_setting_team_new:
 *
 * Creates a new #NMSettingTeam object with default values.
 *
 * Returns: (transfer full): the new empty #NMSettingTeam object
 **/
NMSetting *
nm_setting_team_new (void)
{
	return (NMSetting *) g_object_new (NM_TYPE_SETTING_TEAM, NULL);
}

/**
 * nm_setting_team_get_config:
 * @setting: the #NMSettingTeam
 *
 * Returns: the #NMSettingTeam:config property of the setting
 **/
const char *
nm_setting_team_get_config (NMSettingTeam *setting)
{
	g_return_val_if_fail (NM_IS_SETTING_TEAM (setting), NULL);

	return NM_SETTING_TEAM_GET_PRIVATE (setting)->config;
}

static gboolean
verify (NMSetting *setting, NMConnection *connection, GError **error)
{
	NMSettingTeamPrivate *priv = NM_SETTING_TEAM_GET_PRIVATE (setting);

	if (!_nm_connection_verify_required_interface_name (connection, error))
		return FALSE;

	if (priv->config) {
		if (strlen (priv->config) > 1*1024*1024) {
			g_set_error (error, NM_CONNECTION_ERROR, NM_CONNECTION_ERROR_INVALID_PROPERTY,
			             _("team config exceeds size limit"));
			g_prefix_error (error,
			                "%s.%s: ",
			                NM_SETTING_TEAM_SETTING_NAME,
			                NM_SETTING_TEAM_CONFIG);
			return FALSE;
		}

		if (!nm_utils_is_json_object (priv->config, error)) {
			g_prefix_error (error,
			                "%s.%s: ",
			                NM_SETTING_TEAM_SETTING_NAME,
			                NM_SETTING_TEAM_CONFIG);
			/* We treat an empty string as no config for compatibility. */
			return *priv->config ? FALSE : NM_SETTING_VERIFY_NORMALIZABLE;
		}
	}

	/* NOTE: normalizable/normalizable-errors must appear at the end with decreasing severity.
	 * Take care to properly order statements with priv->config above. */

	return TRUE;
}

static gboolean
compare_property (NMSetting *setting,
                  NMSetting *other,
                  const GParamSpec *prop_spec,
                  NMSettingCompareFlags flags)
{
	NMSettingClass *parent_class;

	/* If we are trying to match a connection in order to assume it (and thus
	 * @flags contains INFERRABLE), use the "relaxed" matching for team
	 * configuration. Otherwise, for all other purposes (including connection
	 * comparison before an update), resort to the default string comparison.
	 */
	if (   NM_FLAGS_HAS (flags, NM_SETTING_COMPARE_FLAG_INFERRABLE)
	    && nm_streq0 (prop_spec->name, NM_SETTING_TEAM_CONFIG)) {
		return _nm_utils_team_config_equal (NM_SETTING_TEAM_GET_PRIVATE (setting)->config,
		                                    NM_SETTING_TEAM_GET_PRIVATE (other)->config,
		                                    FALSE);
	}

	/* Otherwise chain up to parent to handle generic compare */
	parent_class = NM_SETTING_CLASS (nm_setting_team_parent_class);
	return parent_class->compare_property (setting, other, prop_spec, flags);
}

static void
nm_setting_team_init (NMSettingTeam *setting)
{
}

static void
finalize (GObject *object)
{
	NMSettingTeamPrivate *priv = NM_SETTING_TEAM_GET_PRIVATE (object);

	g_free (priv->config);

	G_OBJECT_CLASS (nm_setting_team_parent_class)->finalize (object);
}

static void
set_property (GObject *object, guint prop_id,
              const GValue *value, GParamSpec *pspec)
{
	NMSettingTeamPrivate *priv = NM_SETTING_TEAM_GET_PRIVATE (object);

	switch (prop_id) {
	case PROP_CONFIG:
		g_free (priv->config);
		priv->config = g_value_dup_string (value);
		break;
	default:
		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
		break;
	}
}

static void
get_property (GObject *object, guint prop_id,
              GValue *value, GParamSpec *pspec)
{
	NMSettingTeam *setting = NM_SETTING_TEAM (object);

	switch (prop_id) {
	case PROP_CONFIG:
		g_value_set_string (value, nm_setting_team_get_config (setting));
		break;
	default:
		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
		break;
	}
}

static void
nm_setting_team_class_init (NMSettingTeamClass *setting_class)
{
	GObjectClass *object_class = G_OBJECT_CLASS (setting_class);
	NMSettingClass *parent_class = NM_SETTING_CLASS (setting_class);

	g_type_class_add_private (setting_class, sizeof (NMSettingTeamPrivate));

	/* virtual methods */
	object_class->set_property     = set_property;
	object_class->get_property     = get_property;
	object_class->finalize         = finalize;
	parent_class->compare_property = compare_property;
	parent_class->verify           = verify;

	/* Properties */
	/**
	 * NMSettingTeam:config:
	 *
	 * The JSON configuration for the team network interface.  The property
	 * should contain raw JSON configuration data suitable for teamd, because
	 * the value is passed directly to teamd. If not specified, the default
	 * configuration is used.  See man teamd.conf for the format details.
	 **/
	/* ---ifcfg-rh---
	 * property: config
	 * variable: TEAM_CONFIG
	 * description: Team configuration in JSON. See man teamd.conf for details.
	 * ---end---
	 */
	g_object_class_install_property
		(object_class, PROP_CONFIG,
		 g_param_spec_string (NM_SETTING_TEAM_CONFIG, "", "",
		                      NULL,
		                      G_PARAM_READWRITE |
		                      NM_SETTING_PARAM_INFERRABLE |
		                      G_PARAM_STATIC_STRINGS));

	/* ---dbus---
	 * property: interface-name
	 * format: string
	 * description: Deprecated in favor of connection.interface-name, but can
	 *   be used for backward-compatibility with older daemons, to set the
	 *   team's interface name.
	 * ---end---
	 */
	_nm_setting_class_add_dbus_only_property (parent_class, "interface-name",
	                                          G_VARIANT_TYPE_STRING,
	                                          _nm_setting_get_deprecated_virtual_interface_name,
	                                          NULL);
}