diff options
Diffstat (limited to 'src/devices/nm-device-bridge.c')
| -rw-r--r-- | src/devices/nm-device-bridge.c | 588 |
1 files changed, 588 insertions, 0 deletions
diff --git a/src/devices/nm-device-bridge.c b/src/devices/nm-device-bridge.c new file mode 100644 index 00000000..edc41838 --- /dev/null +++ b/src/devices/nm-device-bridge.c @@ -0,0 +1,588 @@ +/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */ +/* NetworkManager -- Network link manager + * + * 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 of the License, or + * (at your option) any later version. + * + * This program 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 program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Copyright 2011 - 2012 Red Hat, Inc. + */ + +#include "config.h" + +#include <glib.h> +#include <glib/gi18n.h> + +#include <netinet/ether.h> +#include <stdlib.h> + +#include "gsystem-local-alloc.h" +#include "nm-device-bridge.h" +#include "nm-logging.h" +#include "nm-utils.h" +#include "NetworkManagerUtils.h" +#include "nm-device-private.h" +#include "nm-dbus-glib-types.h" +#include "nm-dbus-manager.h" +#include "nm-enum-types.h" +#include "nm-platform.h" + +#include "nm-device-bridge-glue.h" + + +G_DEFINE_TYPE (NMDeviceBridge, nm_device_bridge, NM_TYPE_DEVICE) + +#define NM_DEVICE_BRIDGE_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), NM_TYPE_DEVICE_BRIDGE, NMDeviceBridgePrivate)) + +#define NM_BRIDGE_ERROR (nm_bridge_error_quark ()) + +typedef struct { + int dummy; +} NMDeviceBridgePrivate; + +enum { + PROP_0, + PROP_SLAVES, + + LAST_PROP +}; + +/******************************************************************/ + +static GQuark +nm_bridge_error_quark (void) +{ + static GQuark quark = 0; + if (!quark) + quark = g_quark_from_static_string ("nm-bridge-error"); + return quark; +} + +/******************************************************************/ + +static guint32 +get_generic_capabilities (NMDevice *dev) +{ + return NM_DEVICE_CAP_CARRIER_DETECT; +} + +static gboolean +is_available (NMDevice *dev) +{ + if (NM_DEVICE_GET_CLASS (dev)->is_up) + return NM_DEVICE_GET_CLASS (dev)->is_up (dev); + return FALSE; +} + +static gboolean +check_connection_available (NMDevice *device, + NMConnection *connection, + const char *specific_object) +{ + /* Connections are always available because the carrier state is determined + * by the bridge port carrier states, not the bridge's state. + */ + return TRUE; +} + +static gboolean +check_connection_compatible (NMDevice *device, NMConnection *connection) +{ + const char *iface; + NMSettingBridge *s_bridge; + const GByteArray *mac_address; + + if (!NM_DEVICE_CLASS (nm_device_bridge_parent_class)->check_connection_compatible (device, connection)) + return FALSE; + + s_bridge = nm_connection_get_setting_bridge (connection); + if (!s_bridge || !nm_connection_is_type (connection, NM_SETTING_BRIDGE_SETTING_NAME)) + return FALSE; + + /* Bridge connections must specify the virtual interface name */ + iface = nm_connection_get_virtual_iface_name (connection); + if (!iface || strcmp (nm_device_get_iface (device), iface)) + return FALSE; + + mac_address = nm_setting_bridge_get_mac_address (s_bridge); + if (mac_address) { + guint hw_len; + const guint8 *hw_addr; + + hw_addr = nm_device_get_hw_address (device, &hw_len); + if ( !hw_addr + || hw_len != mac_address->len + || memcmp (mac_address->data, hw_addr, hw_len) != 0) + return FALSE; + } + + return TRUE; +} + +static gboolean +complete_connection (NMDevice *device, + NMConnection *connection, + const char *specific_object, + const GSList *existing_connections, + GError **error) +{ + NMSettingBridge *s_bridge, *tmp; + guint32 i = 0; + char *name; + const GSList *iter; + gboolean found; + + nm_utils_complete_generic (connection, + NM_SETTING_BRIDGE_SETTING_NAME, + existing_connections, + _("Bridge connection %d"), + NULL, + TRUE); + + s_bridge = nm_connection_get_setting_bridge (connection); + if (!s_bridge) { + s_bridge = (NMSettingBridge *) nm_setting_bridge_new (); + nm_connection_add_setting (connection, NM_SETTING (s_bridge)); + } + + /* Grab the first name that doesn't exist in either our connections + * or a device on the system. + */ + while (i < 500 && !nm_setting_bridge_get_interface_name (s_bridge)) { + name = g_strdup_printf ("br%u", i); + /* check interface names */ + if (!nm_platform_link_exists (name)) { + /* check existing bridge connections */ + for (iter = existing_connections, found = FALSE; iter; iter = g_slist_next (iter)) { + NMConnection *candidate = iter->data; + + tmp = nm_connection_get_setting_bridge (candidate); + if (tmp && nm_connection_is_type (candidate, NM_SETTING_BRIDGE_SETTING_NAME)) { + if (g_strcmp0 (nm_setting_bridge_get_interface_name (tmp), name) == 0) { + found = TRUE; + break; + } + } + } + + if (!found) + g_object_set (G_OBJECT (s_bridge), NM_SETTING_BRIDGE_INTERFACE_NAME, name, NULL); + } + + g_free (name); + i++; + } + + return TRUE; +} + +/******************************************************************/ + +typedef struct { + const char *name; + const char *sysname; + gboolean default_if_zero; + gboolean user_hz_compensate; +} Option; + +static const Option master_options[] = { + { NM_SETTING_BRIDGE_STP, "stp_state", FALSE, FALSE }, + { NM_SETTING_BRIDGE_PRIORITY, "priority", TRUE, FALSE }, + { NM_SETTING_BRIDGE_FORWARD_DELAY, "forward_delay", TRUE, TRUE }, + { NM_SETTING_BRIDGE_HELLO_TIME, "hello_time", TRUE, TRUE }, + { NM_SETTING_BRIDGE_MAX_AGE, "max_age", TRUE, TRUE }, + { NM_SETTING_BRIDGE_AGEING_TIME, "ageing_time", TRUE, TRUE }, + { NULL, NULL } +}; + +static const Option slave_options[] = { + { NM_SETTING_BRIDGE_PORT_PRIORITY, "priority", TRUE, FALSE }, + { NM_SETTING_BRIDGE_PORT_PATH_COST, "path_cost", TRUE, FALSE }, + { NM_SETTING_BRIDGE_PORT_HAIRPIN_MODE, "hairpin_mode", FALSE, FALSE }, + { NULL, NULL } +}; + +static void +commit_option (NMDevice *device, NMSetting *setting, const Option *option, gboolean slave) +{ + int ifindex = nm_device_get_ifindex (device); + GParamSpec *pspec; + GValue val = G_VALUE_INIT; + guint32 uval = 0; + gs_free char *value = NULL; + + g_assert (setting); + + pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (setting), option->name); + g_assert (pspec); + + /* Get the property's value */ + g_value_init (&val, G_PARAM_SPEC_VALUE_TYPE (pspec)); + g_object_get_property ((GObject *) setting, option->name, &val); + if (G_VALUE_HOLDS_BOOLEAN (&val)) + uval = g_value_get_boolean (&val) ? 1 : 0; + else if (G_VALUE_HOLDS_UINT (&val)) { + uval = g_value_get_uint (&val); + + /* zero means "unspecified" for some NM properties but isn't in the + * allowed kernel range, so reset the property to the default value. + */ + if (option->default_if_zero && uval == 0) { + g_value_unset (&val); + g_value_init (&val, G_PARAM_SPEC_VALUE_TYPE (pspec)); + g_param_value_set_default (pspec, &val); + uval = g_value_get_uint (&val); + } + + /* Linux kernel bridge interfaces use 'centiseconds' for time-based values. + * In reality it's not centiseconds, but depends on HZ and USER_HZ, which + * is almost always works out to be a multiplier of 100, so we can assume + * centiseconds. See clock_t_to_jiffies(). + */ + if (option->user_hz_compensate) + uval *= 100; + } else + g_assert_not_reached (); + g_value_unset (&val); + + value = g_strdup_printf ("%u", uval); + if (slave) + nm_platform_slave_set_option (ifindex, option->sysname, value); + else + nm_platform_master_set_option (ifindex, option->sysname, value); +} + +static void +commit_master_options (NMDevice *device, NMSettingBridge *setting) +{ + const Option *option; + NMSetting *s = NM_SETTING (setting); + + for (option = master_options; option->name; option++) + commit_option (device, s, option, FALSE); +} + +static void +commit_slave_options (NMDevice *device, NMSettingBridgePort *setting) +{ + const Option *option; + NMSetting *s, *s_clear = NULL; + + if (setting) + s = NM_SETTING (setting); + else + s = s_clear = nm_setting_bridge_port_new (); + + for (option = slave_options; option->name; option++) + commit_option (device, s, option, TRUE); + + g_clear_object (&s_clear); +} + +static void +update_connection (NMDevice *device, NMConnection *connection) +{ + NMSettingBridge *s_bridge = nm_connection_get_setting_bridge (connection); + const char *ifname = nm_device_get_iface (device); + int ifindex = nm_device_get_ifindex (device); + const Option *option; + + if (!s_bridge) { + s_bridge = (NMSettingBridge *) nm_setting_bridge_new (); + nm_connection_add_setting (connection, (NMSetting *) s_bridge); + g_object_set (s_bridge, NM_SETTING_BRIDGE_INTERFACE_NAME, ifname, NULL); + } + + for (option = master_options; option->name; option++) { + gs_free char *str = nm_platform_master_get_option (ifindex, option->sysname); + int value; + + if (str) { + value = strtol (str, NULL, 10); + + /* See comments in set_sysfs_uint() about centiseconds. */ + if (option->user_hz_compensate) + value /= 100; + + g_object_set (s_bridge, option->name, value, NULL); + } else { + nm_log_warn (LOGD_BRIDGE, "(%s): failed to read bridge setting '%s'", + nm_device_get_iface (device), option->sysname); + } + } +} + +/** + * nm_bridge_update_slave_connection: + * @slave: the slave #NMDevice, is *not* necessarily a bridge interface + * @connection: the #NMConnection to update with the bridge port settings + * + * Reads bridge port configuration and updates @connection with those + * properties. + * + * Returns: %TRUE if the port configuration was read and @connection updated, + * %FALSE if not. + */ +gboolean +nm_bridge_update_slave_connection (NMDevice *slave, NMConnection *connection) +{ + NMSettingBridgePort *s_port; + int ifindex = nm_device_get_ifindex (slave); + const Option *option; + + g_return_val_if_fail (NM_IS_DEVICE (slave), FALSE); + g_return_val_if_fail (NM_IS_CONNECTION (connection), FALSE); + + s_port = nm_connection_get_setting_bridge_port (connection); + if (!s_port) { + s_port = (NMSettingBridgePort *) nm_setting_bridge_port_new (); + nm_connection_add_setting (connection, NM_SETTING (s_port)); + } + + for (option = slave_options; option->name; option++) { + gs_free char *str = nm_platform_slave_get_option (ifindex, option->sysname); + int value; + + if (str) { + value = strtol (str, NULL, 10); + + /* See comments in set_sysfs_uint() about centiseconds. */ + if (option->user_hz_compensate) + value /= 100; + + g_object_set (s_port, option->name, value, NULL); + } else { + nm_log_warn (LOGD_BRIDGE, "(%s): failed to read bridge port setting '%s'", + nm_device_get_iface (slave), option->sysname); + } + } + + return TRUE; +} + +static NMActStageReturn +act_stage1_prepare (NMDevice *device, NMDeviceStateReason *reason) +{ + NMActStageReturn ret; + NMConnection *connection = nm_device_get_connection (device); + + g_assert (connection); + + ret = NM_DEVICE_CLASS (nm_device_bridge_parent_class)->act_stage1_prepare (device, reason); + if (ret != NM_ACT_STAGE_RETURN_SUCCESS) + return ret; + + commit_master_options (device, nm_connection_get_setting_bridge (connection)); + + return NM_ACT_STAGE_RETURN_SUCCESS; +} + +static gboolean +enslave_slave (NMDevice *device, + NMDevice *slave, + NMConnection *connection, + gboolean configure) +{ + if (configure) { + if (!nm_platform_link_enslave (nm_device_get_ip_ifindex (device), nm_device_get_ip_ifindex (slave))) + return FALSE; + + commit_slave_options (slave, nm_connection_get_setting_bridge_port (connection)); + + nm_log_info (LOGD_BRIDGE, "(%s): attached bridge port %s", + nm_device_get_ip_iface (device), + nm_device_get_ip_iface (slave)); + } else { + nm_log_info (LOGD_BRIDGE, "(%s): bridge port %s was attached", + nm_device_get_ip_iface (device), + nm_device_get_ip_iface (slave)); + } + + g_object_notify (G_OBJECT (device), NM_DEVICE_BRIDGE_SLAVES); + + return TRUE; +} + +static gboolean +release_slave (NMDevice *device, + NMDevice *slave, + gboolean configure) +{ + gboolean success = TRUE; + + if (configure) { + success = nm_platform_link_release (nm_device_get_ip_ifindex (device), + nm_device_get_ip_ifindex (slave)); + + if (success) { + nm_log_info (LOGD_BRIDGE, "(%s): detached bridge port %s", + nm_device_get_ip_iface (device), + nm_device_get_ip_iface (slave)); + } else { + nm_log_warn (LOGD_BRIDGE, "(%s): failed to detach bridge port %s", + nm_device_get_ip_iface (device), + nm_device_get_ip_iface (slave)); + } + } else { + nm_log_info (LOGD_BRIDGE, "(%s): bridge port %s was detached", + nm_device_get_ip_iface (device), + nm_device_get_ip_iface (slave)); + } + + g_object_notify (G_OBJECT (device), NM_DEVICE_BRIDGE_SLAVES); + return success; +} + +/******************************************************************/ + +NMDevice * +nm_device_bridge_new (NMPlatformLink *platform_device) +{ + g_return_val_if_fail (platform_device != NULL, NULL); + + return (NMDevice *) g_object_new (NM_TYPE_DEVICE_BRIDGE, + NM_DEVICE_PLATFORM_DEVICE, platform_device, + NM_DEVICE_DRIVER, "bridge", + NM_DEVICE_TYPE_DESC, "Bridge", + NM_DEVICE_DEVICE_TYPE, NM_DEVICE_TYPE_BRIDGE, + NM_DEVICE_IS_MASTER, TRUE, + NULL); +} + +NMDevice * +nm_device_bridge_new_for_connection (NMConnection *connection) +{ + const char *iface; + NMSettingBridge *s_bridge; + const GByteArray *mac_address; + + g_return_val_if_fail (connection != NULL, NULL); + + iface = nm_connection_get_virtual_iface_name (connection); + g_return_val_if_fail (iface != NULL, NULL); + + s_bridge = nm_connection_get_setting_bridge (connection); + g_return_val_if_fail (s_bridge, NULL); + + mac_address = nm_setting_bridge_get_mac_address (s_bridge); + + if ( !nm_platform_bridge_add (iface, + mac_address ? mac_address->data : NULL, + mac_address ? mac_address->len : 0) + && nm_platform_get_error () != NM_PLATFORM_ERROR_EXISTS) { + nm_log_warn (LOGD_DEVICE | LOGD_BRIDGE, "(%s): failed to create bridge master interface for '%s': %s", + iface, nm_connection_get_id (connection), + nm_platform_get_error_msg ()); + return NULL; + } + + return (NMDevice *) g_object_new (NM_TYPE_DEVICE_BRIDGE, + NM_DEVICE_IFACE, iface, + NM_DEVICE_DRIVER, "bridge", + NM_DEVICE_TYPE_DESC, "Bridge", + NM_DEVICE_DEVICE_TYPE, NM_DEVICE_TYPE_BRIDGE, + NM_DEVICE_IS_MASTER, TRUE, + NULL); +} + +static void +constructed (GObject *object) +{ + G_OBJECT_CLASS (nm_device_bridge_parent_class)->constructed (object); + + nm_log_dbg (LOGD_HW | LOGD_BRIDGE, "(%s): kernel ifindex %d", + nm_device_get_iface (NM_DEVICE (object)), + nm_device_get_ifindex (NM_DEVICE (object))); +} + +static void +nm_device_bridge_init (NMDeviceBridge * self) +{ +} + +static void +get_property (GObject *object, guint prop_id, + GValue *value, GParamSpec *pspec) +{ + GPtrArray *slaves; + GSList *list, *iter; + + switch (prop_id) { + break; + case PROP_SLAVES: + slaves = g_ptr_array_new (); + list = nm_device_master_get_slaves (NM_DEVICE (object)); + for (iter = list; iter; iter = iter->next) + g_ptr_array_add (slaves, g_strdup (nm_device_get_path (NM_DEVICE (iter->data)))); + g_slist_free (list); + g_value_take_boxed (value, slaves); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + } +} + +static void +set_property (GObject *object, guint prop_id, + const GValue *value, GParamSpec *pspec) +{ + switch (prop_id) { + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + } +} + +static void +nm_device_bridge_class_init (NMDeviceBridgeClass *klass) +{ + GObjectClass *object_class = G_OBJECT_CLASS (klass); + NMDeviceClass *parent_class = NM_DEVICE_CLASS (klass); + + g_type_class_add_private (object_class, sizeof (NMDeviceBridgePrivate)); + + parent_class->connection_type = NM_SETTING_BRIDGE_SETTING_NAME; + + /* virtual methods */ + object_class->constructed = constructed; + object_class->get_property = get_property; + object_class->set_property = set_property; + + parent_class->get_generic_capabilities = get_generic_capabilities; + parent_class->is_available = is_available; + parent_class->check_connection_compatible = check_connection_compatible; + parent_class->check_connection_available = check_connection_available; + parent_class->complete_connection = complete_connection; + + parent_class->update_connection = update_connection; + + parent_class->act_stage1_prepare = act_stage1_prepare; + parent_class->enslave_slave = enslave_slave; + parent_class->release_slave = release_slave; + + /* properties */ + g_object_class_install_property + (object_class, PROP_SLAVES, + g_param_spec_boxed (NM_DEVICE_BRIDGE_SLAVES, + "Slaves", + "Slaves", + DBUS_TYPE_G_ARRAY_OF_OBJECT_PATH, + G_PARAM_READABLE)); + + nm_dbus_manager_register_exported_type (nm_dbus_manager_get (), + G_TYPE_FROM_CLASS (klass), + &dbus_glib_nm_device_bridge_object_info); + + dbus_g_error_domain_register (NM_BRIDGE_ERROR, NULL, NM_TYPE_BRIDGE_ERROR); +} |