// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2011 - 2018 Red Hat, Inc. */ #include "nm-default.h" #include "nm-device-bond.h" #include #include #include "NetworkManagerUtils.h" #include "nm-device-private.h" #include "platform/nm-platform.h" #include "nm-device-factory.h" #include "nm-core-internal.h" #include "nm-ip4-config.h" #include "nm-device-logging.h" _LOG_DECLARE_SELF(NMDeviceBond); /*****************************************************************************/ struct _NMDeviceBond { NMDevice parent; }; struct _NMDeviceBondClass { NMDeviceClass parent; }; G_DEFINE_TYPE (NMDeviceBond, nm_device_bond, NM_TYPE_DEVICE) /*****************************************************************************/ static NMDeviceCapabilities get_generic_capabilities (NMDevice *dev) { return NM_DEVICE_CAP_CARRIER_DETECT | NM_DEVICE_CAP_IS_SOFTWARE; } static gboolean complete_connection (NMDevice *device, NMConnection *connection, const char *specific_object, NMConnection *const*existing_connections, GError **error) { NMSettingBond *s_bond; nm_utils_complete_generic (nm_device_get_platform (device), connection, NM_SETTING_BOND_SETTING_NAME, existing_connections, NULL, _("Bond connection"), "bond", NULL, TRUE); s_bond = nm_connection_get_setting_bond (connection); if (!s_bond) { s_bond = (NMSettingBond *) nm_setting_bond_new (); nm_connection_add_setting (connection, NM_SETTING (s_bond)); } return TRUE; } /*****************************************************************************/ static gboolean _set_bond_attr (NMDevice *device, const char *attr, const char *value) { NMDeviceBond *self = NM_DEVICE_BOND (device); int ifindex = nm_device_get_ifindex (device); gboolean ret; ret = nm_platform_sysctl_master_set_option (nm_device_get_platform (device), ifindex, attr, value); if (!ret) _LOGW (LOGD_PLATFORM, "failed to set bonding attribute '%s' to '%s'", attr, value); return ret; } #define _set_bond_attr_take(device, attr, value) \ G_STMT_START { \ gs_free char *_tmp = (value); \ \ _set_bond_attr (device, NM_SETTING_BOND_OPTION_ARP_IP_TARGET, _tmp); \ } G_STMT_END #define _set_bond_attr_printf(device, attr, fmt, ...) \ _set_bond_attr_take ((device), (attr), g_strdup_printf (fmt, __VA_ARGS__)) static gboolean ignore_option (NMSettingBond *s_bond, const char *option, const char *value) { const char *defvalue; if (nm_streq0 (option, NM_SETTING_BOND_OPTION_MIIMON)) { /* The default value for miimon, when missing in the setting, is * 0 if arp_interval is != 0, and 100 otherwise. So, let's ignore * miimon=0 (which means that miimon is disabled) and accept any * other value. Adding miimon=100 does not cause any harm. */ defvalue = "0"; } else defvalue = nm_setting_bond_get_option_default (s_bond, option); return nm_streq0 (value, defvalue); } static void update_connection (NMDevice *device, NMConnection *connection) { NMSettingBond *s_bond = nm_connection_get_setting_bond (connection); int ifindex = nm_device_get_ifindex (device); NMBondMode mode = NM_BOND_MODE_UNKNOWN; const char **options; if (!s_bond) { s_bond = (NMSettingBond *) nm_setting_bond_new (); nm_connection_add_setting (connection, (NMSetting *) s_bond); } /* Read bond options from sysfs and update the Bond setting to match */ options = nm_setting_bond_get_valid_options (s_bond); for (; *options; options++) { char *p; gs_free char *value = nm_platform_sysctl_master_get_option (nm_device_get_platform (device), ifindex, *options); if ( value && _nm_setting_bond_get_option_type (s_bond, *options) == NM_BOND_OPTION_TYPE_BOTH) { p = strchr (value, ' '); if (p) *p = '\0'; } if (mode == NM_BOND_MODE_UNKNOWN) { if (value && nm_streq (*options, NM_SETTING_BOND_OPTION_MODE)) mode = _nm_setting_bond_mode_from_string (value); if (mode == NM_BOND_MODE_UNKNOWN) continue; } if (!_nm_setting_bond_option_supported (*options, mode)) continue; if ( value && value[0] && !ignore_option (s_bond, *options, value)) { /* Replace " " with "," for arp_ip_targets from the kernel */ if (strcmp (*options, NM_SETTING_BOND_OPTION_ARP_IP_TARGET) == 0) { for (p = value; *p; p++) { if (*p == ' ') *p = ','; } } nm_setting_bond_add_option (s_bond, *options, value); } } } static gboolean master_update_slave_connection (NMDevice *self, NMDevice *slave, NMConnection *connection, GError **error) { g_object_set (nm_connection_get_setting_connection (connection), NM_SETTING_CONNECTION_MASTER, nm_device_get_iface (self), NM_SETTING_CONNECTION_SLAVE_TYPE, NM_SETTING_BOND_SETTING_NAME, NULL); return TRUE; } static void set_arp_targets (NMDevice *device, NMBondMode mode, const char *cur_arp_ip_target, const char *new_arp_ip_target) { gs_unref_ptrarray GPtrArray *free_list = NULL; gs_free const char **cur_strv = NULL; gs_free const char **new_strv = NULL; gsize cur_len; gsize new_len; gsize i; gsize j; cur_strv = nm_utils_strsplit_set_full (cur_arp_ip_target, NM_ASCII_SPACES, NM_UTILS_STRSPLIT_SET_FLAGS_STRSTRIP); new_strv = nm_utils_bond_option_arp_ip_targets_split (new_arp_ip_target); cur_len = NM_PTRARRAY_LEN (cur_strv); new_len = NM_PTRARRAY_LEN (new_strv); if (new_len > 0) { for (j = 0, i = 0; i < new_len; i++) { const char *s; in_addr_t a4; s = new_strv[i]; if (nm_utils_parse_inaddr_bin (AF_INET, s, NULL, &a4)) { char sbuf[INET_ADDRSTRLEN]; _nm_utils_inet4_ntop (a4, sbuf); if (!nm_streq (s, sbuf)) { if (!free_list) free_list = g_ptr_array_new_with_free_func (g_free); s = g_strdup (sbuf); g_ptr_array_add (free_list, (gpointer) s); } } if (nm_utils_strv_find_first ((char **) new_strv, i, s) < 0) new_strv[j++] = s; } new_strv[j] = NULL; new_len = j; } if ( cur_len == 0 && new_len == 0) return; if (_nm_utils_strv_equal ((char **) cur_strv, (char **) new_strv)) return; for (i = 0; i < cur_len; i++) _set_bond_attr_printf (device, NM_SETTING_BOND_OPTION_ARP_IP_TARGET, "-%s", cur_strv[i]); for (i = 0; i < new_len; i++) _set_bond_attr_printf (device, NM_SETTING_BOND_OPTION_ARP_IP_TARGET, "+%s", new_strv[i]); } /* * Sets bond attribute stored in the option hashtable or * the default value if no value was set. */ static void set_bond_attr_or_default (NMDevice *device, NMSettingBond *s_bond, const char *opt) { NMDeviceBond *self = NM_DEVICE_BOND (device); const char *value; value = nm_setting_bond_get_option_or_default (s_bond, opt); if (!value) { if ( _LOGT_ENABLED (LOGD_BOND) && nm_setting_bond_get_option_by_name (s_bond, opt)) _LOGT (LOGD_BOND, "bond option '%s' not set as it conflicts with other options", opt); return; } _set_bond_attr (device, opt, value); } static void set_bond_attr_active_slave (NMDevice *device, NMSettingBond *s_bond) { NMDeviceBond *self = NM_DEVICE_BOND (device); const NMPlatformLink *plink; const char *value; const char *error_reason; int ifindex; value = nm_setting_bond_get_option_or_default (s_bond, NM_SETTING_BOND_OPTION_ACTIVE_SLAVE); if (!value) return; if (!nm_str_is_empty (value)) { ifindex = nm_device_get_ifindex (device); plink = nm_platform_link_get_by_ifname (nm_device_get_platform (device), value); if (!plink) error_reason = "does not exist"; else if (plink->master != ifindex) error_reason = "is not yet enslaved"; else if (!NM_FLAGS_HAS (plink->n_ifi_flags, IFF_UP)) error_reason = "is not up"; else error_reason = NULL; if (error_reason) { _LOGT (LOGD_BOND, "bond option 'active_slave' not set as device \"%s\" %s", value, error_reason); return; } } _set_bond_attr (device, NM_SETTING_BOND_OPTION_ACTIVE_SLAVE, value); } static gboolean apply_bonding_config (NMDeviceBond *self) { NMDevice *device = NM_DEVICE (self); int ifindex = nm_device_get_ifindex (device); NMSettingBond *s_bond; NMBondMode mode; const char *mode_str; gs_free char *cur_arp_ip_target = NULL; s_bond = nm_device_get_applied_setting (device, NM_TYPE_SETTING_BOND); g_return_val_if_fail (s_bond, FALSE); mode_str = nm_setting_bond_get_option_or_default (s_bond, NM_SETTING_BOND_OPTION_MODE); mode = _nm_setting_bond_mode_from_string (mode_str); g_return_val_if_fail (mode != NM_BOND_MODE_UNKNOWN, FALSE); /* Set mode first, as some other options (e.g. arp_interval) are valid * only for certain modes. */ set_bond_attr_or_default (device, s_bond, NM_SETTING_BOND_OPTION_MODE); set_bond_attr_or_default (device, s_bond, NM_SETTING_BOND_OPTION_MIIMON); set_bond_attr_or_default (device, s_bond, NM_SETTING_BOND_OPTION_UPDELAY); set_bond_attr_or_default (device, s_bond, NM_SETTING_BOND_OPTION_DOWNDELAY); set_bond_attr_or_default (device, s_bond, NM_SETTING_BOND_OPTION_ARP_INTERVAL); set_bond_attr_or_default (device, s_bond, NM_SETTING_BOND_OPTION_ARP_VALIDATE); set_bond_attr_or_default (device, s_bond, NM_SETTING_BOND_OPTION_PRIMARY); /* ARP targets: clear and initialize the list */ cur_arp_ip_target = nm_platform_sysctl_master_get_option (nm_device_get_platform (device), ifindex, NM_SETTING_BOND_OPTION_ARP_IP_TARGET); set_arp_targets (device, mode, cur_arp_ip_target, nm_setting_bond_get_option_or_default (s_bond, NM_SETTING_BOND_OPTION_ARP_IP_TARGET)); set_bond_attr_or_default (device, s_bond, NM_SETTING_BOND_OPTION_AD_ACTOR_SYSTEM); set_bond_attr_active_slave (device, s_bond); set_bond_attr_or_default (device, s_bond, NM_SETTING_BOND_OPTION_AD_ACTOR_SYS_PRIO); set_bond_attr_or_default (device, s_bond, NM_SETTING_BOND_OPTION_AD_SELECT); set_bond_attr_or_default (device, s_bond, NM_SETTING_BOND_OPTION_AD_USER_PORT_KEY); set_bond_attr_or_default (device, s_bond, NM_SETTING_BOND_OPTION_ALL_SLAVES_ACTIVE); set_bond_attr_or_default (device, s_bond, NM_SETTING_BOND_OPTION_ARP_ALL_TARGETS); set_bond_attr_or_default (device, s_bond, NM_SETTING_BOND_OPTION_FAIL_OVER_MAC); set_bond_attr_or_default (device, s_bond, NM_SETTING_BOND_OPTION_LACP_RATE); set_bond_attr_or_default (device, s_bond, NM_SETTING_BOND_OPTION_LP_INTERVAL); set_bond_attr_or_default (device, s_bond, NM_SETTING_BOND_OPTION_MIN_LINKS); set_bond_attr_or_default (device, s_bond, NM_SETTING_BOND_OPTION_PACKETS_PER_SLAVE); set_bond_attr_or_default (device, s_bond, NM_SETTING_BOND_OPTION_PRIMARY_RESELECT); set_bond_attr_or_default (device, s_bond, NM_SETTING_BOND_OPTION_RESEND_IGMP); set_bond_attr_or_default (device, s_bond, NM_SETTING_BOND_OPTION_TLB_DYNAMIC_LB); set_bond_attr_or_default (device, s_bond, NM_SETTING_BOND_OPTION_USE_CARRIER); set_bond_attr_or_default (device, s_bond, NM_SETTING_BOND_OPTION_XMIT_HASH_POLICY); set_bond_attr_or_default (device, s_bond, NM_SETTING_BOND_OPTION_NUM_GRAT_ARP); return TRUE; } static NMActStageReturn act_stage1_prepare (NMDevice *device, NMDeviceStateReason *out_failure_reason) { NMDeviceBond *self = NM_DEVICE_BOND (device); NMActStageReturn ret = NM_ACT_STAGE_RETURN_SUCCESS; /* Interface must be down to set bond options */ nm_device_take_down (device, TRUE); if (!apply_bonding_config (self)) ret = NM_ACT_STAGE_RETURN_FAILURE; else { if (!nm_device_hw_addr_set_cloned (device, nm_device_get_applied_connection (device), FALSE)) ret = NM_ACT_STAGE_RETURN_FAILURE; } nm_device_bring_up (device, TRUE, NULL); return ret; } static gboolean enslave_slave (NMDevice *device, NMDevice *slave, NMConnection *connection, gboolean configure) { NMDeviceBond *self = NM_DEVICE_BOND (device); gboolean success = TRUE; const char *slave_iface = nm_device_get_ip_iface (slave); NMConnection *master_con; nm_device_master_check_slave_physical_port (device, slave, LOGD_BOND); if (configure) { nm_device_take_down (slave, TRUE); success = nm_platform_link_enslave (nm_device_get_platform (device), nm_device_get_ip_ifindex (device), nm_device_get_ip_ifindex (slave)); nm_device_bring_up (slave, TRUE, NULL); if (!success) return FALSE; _LOGI (LOGD_BOND, "enslaved bond slave %s", slave_iface); /* The active_slave option can be set only after the interface is enslaved */ master_con = nm_device_get_applied_connection (device); if (master_con) { NMSettingBond *s_bond = nm_connection_get_setting_bond (master_con); const char *active; if (s_bond) { active = nm_setting_bond_get_option_or_default (s_bond, NM_SETTING_BOND_OPTION_ACTIVE_SLAVE); if (nm_streq0 (active, nm_device_get_iface (slave))) { nm_platform_sysctl_master_set_option (nm_device_get_platform (device), nm_device_get_ifindex (device), NM_SETTING_BOND_OPTION_ACTIVE_SLAVE, active); _LOGD (LOGD_BOND, "setting slave %s as active one for master %s", active, nm_device_get_iface (device)); } } } } else _LOGI (LOGD_BOND, "bond slave %s was enslaved", slave_iface); return TRUE; } static void release_slave (NMDevice *device, NMDevice *slave, gboolean configure) { NMDeviceBond *self = NM_DEVICE_BOND (device); gboolean success; gs_free char *address = NULL; int ifindex_slave; int ifindex; if (configure) { ifindex = nm_device_get_ifindex (device); if ( ifindex <= 0 || !nm_platform_link_get (nm_device_get_platform (device), ifindex)) configure = FALSE; } ifindex_slave = nm_device_get_ip_ifindex (slave); if (ifindex_slave <= 0) _LOGD (LOGD_BOND, "bond slave %s is already released", nm_device_get_ip_iface (slave)); if (configure) { /* When the last slave is released the bond MAC will be set to a random * value by kernel; remember the current one and restore it afterwards. */ address = g_strdup (nm_device_get_hw_address (device)); if (ifindex_slave > 0) { success = nm_platform_link_release (nm_device_get_platform (device), nm_device_get_ip_ifindex (device), ifindex_slave); if (success) { _LOGI (LOGD_BOND, "released bond slave %s", nm_device_get_ip_iface (slave)); } else { _LOGW (LOGD_BOND, "failed to release bond slave %s", nm_device_get_ip_iface (slave)); } } nm_platform_process_events (nm_device_get_platform (device)); if (nm_device_update_hw_address (device)) nm_device_hw_addr_set (device, address, "restore", FALSE); /* Kernel bonding code "closes" the slave when releasing it, (which clears * IFF_UP), so we must bring it back up here to ensure carrier changes and * other state is noticed by the now-released slave. */ if (ifindex_slave > 0) { if (!nm_device_bring_up (slave, TRUE, NULL)) _LOGW (LOGD_BOND, "released bond slave could not be brought up."); } } else { if (ifindex_slave > 0) { _LOGI (LOGD_BOND, "bond slave %s was released", nm_device_get_ip_iface (slave)); } } } static gboolean create_and_realize (NMDevice *device, NMConnection *connection, NMDevice *parent, const NMPlatformLink **out_plink, GError **error) { const char *iface = nm_device_get_iface (device); int r; g_assert (iface); r = nm_platform_link_bond_add (nm_device_get_platform (device), iface, out_plink); if (r < 0) { g_set_error (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_CREATION_FAILED, "Failed to create bond interface '%s' for '%s': %s", iface, nm_connection_get_id (connection), nm_strerror (r)); return FALSE; } return TRUE; } static gboolean check_changed_options (NMSettingBond *s_a, NMSettingBond *s_b, GError **error) { guint i, num; const char *name = NULL, *value_a = NULL, *value_b = NULL; /* Check that options in @s_a have compatible changes in @s_b */ num = nm_setting_bond_get_num_options (s_a); for (i = 0; i < num; i++) { nm_setting_bond_get_option (s_a, i, &name, &value_a); /* We support changes to these */ if (NM_IN_STRSET (name, NM_SETTING_BOND_OPTION_ACTIVE_SLAVE, NM_SETTING_BOND_OPTION_PRIMARY)) { continue; } /* Missing in @s_b, but has a default value in @s_a */ value_b = nm_setting_bond_get_option_by_name (s_b, name); if ( !value_b && nm_streq0 (value_a, nm_setting_bond_get_option_default (s_a, name))) { continue; } /* Reject any other changes */ if (!nm_streq0 (value_a, value_b)) { g_set_error (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_INCOMPATIBLE_CONNECTION, "Can't reapply '%s' bond option", name); return FALSE; } } return TRUE; } static gboolean can_reapply_change (NMDevice *device, const char *setting_name, NMSetting *s_old, NMSetting *s_new, GHashTable *diffs, GError **error) { NMDeviceClass *device_class; NMSettingBond *s_bond_old, *s_bond_new; /* Only handle bond setting here, delegate other settings to parent class */ if (nm_streq (setting_name, NM_SETTING_BOND_SETTING_NAME)) { if (!nm_device_hash_check_invalid_keys (diffs, NM_SETTING_BOND_SETTING_NAME, error, NM_SETTING_BOND_OPTIONS)) return FALSE; s_bond_old = NM_SETTING_BOND (s_old); s_bond_new = NM_SETTING_BOND (s_new); if ( !check_changed_options (s_bond_old, s_bond_new, error) || !check_changed_options (s_bond_new, s_bond_old, error)) { return FALSE; } return TRUE; } device_class = NM_DEVICE_CLASS (nm_device_bond_parent_class); return device_class->can_reapply_change (device, setting_name, s_old, s_new, diffs, error); } static void reapply_connection (NMDevice *device, NMConnection *con_old, NMConnection *con_new) { NMDeviceBond *self = NM_DEVICE_BOND (device); const char *value; NMSettingBond *s_bond; NMBondMode mode; NM_DEVICE_CLASS (nm_device_bond_parent_class)->reapply_connection (device, con_old, con_new); _LOGD (LOGD_BOND, "reapplying bond settings"); s_bond = nm_connection_get_setting_bond (con_new); g_return_if_fail (s_bond); value = nm_setting_bond_get_option_or_default (s_bond, NM_SETTING_BOND_OPTION_MODE); mode = _nm_setting_bond_mode_from_string (value); g_return_if_fail (mode != NM_BOND_MODE_UNKNOWN); set_bond_attr_or_default (device, s_bond, NM_SETTING_BOND_OPTION_PRIMARY); set_bond_attr_active_slave (device, s_bond); } /*****************************************************************************/ static void nm_device_bond_init (NMDeviceBond * self) { nm_assert (nm_device_is_master (NM_DEVICE (self))); } static const NMDBusInterfaceInfoExtended interface_info_device_bond = { .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT ( NM_DBUS_INTERFACE_DEVICE_BOND, .signals = NM_DEFINE_GDBUS_SIGNAL_INFOS ( &nm_signal_info_property_changed_legacy, ), .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS ( NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L ("HwAddress", "s", NM_DEVICE_HW_ADDRESS), NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L ("Carrier", "b", NM_DEVICE_CARRIER), NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L ("Slaves", "ao", NM_DEVICE_SLAVES), ), ), .legacy_property_changed = TRUE, }; static void nm_device_bond_class_init (NMDeviceBondClass *klass) { NMDBusObjectClass *dbus_object_class = NM_DBUS_OBJECT_CLASS (klass); NMDeviceClass *device_class = NM_DEVICE_CLASS (klass); dbus_object_class->interface_infos = NM_DBUS_INTERFACE_INFOS (&interface_info_device_bond); device_class->connection_type_supported = NM_SETTING_BOND_SETTING_NAME; device_class->connection_type_check_compatible = NM_SETTING_BOND_SETTING_NAME; device_class->link_types = NM_DEVICE_DEFINE_LINK_TYPES (NM_LINK_TYPE_BOND); device_class->is_master = TRUE; device_class->get_generic_capabilities = get_generic_capabilities; device_class->complete_connection = complete_connection; device_class->update_connection = update_connection; device_class->master_update_slave_connection = master_update_slave_connection; device_class->create_and_realize = create_and_realize; device_class->act_stage1_prepare = act_stage1_prepare; device_class->get_configured_mtu = nm_device_get_configured_mtu_for_wired; device_class->enslave_slave = enslave_slave; device_class->release_slave = release_slave; device_class->can_reapply_change = can_reapply_change; device_class->reapply_connection = reapply_connection; } /*****************************************************************************/ #define NM_TYPE_BOND_DEVICE_FACTORY (nm_bond_device_factory_get_type ()) #define NM_BOND_DEVICE_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), NM_TYPE_BOND_DEVICE_FACTORY, NMBondDeviceFactory)) static NMDevice * create_device (NMDeviceFactory *factory, const char *iface, const NMPlatformLink *plink, NMConnection *connection, gboolean *out_ignore) { return (NMDevice *) g_object_new (NM_TYPE_DEVICE_BOND, NM_DEVICE_IFACE, iface, NM_DEVICE_DRIVER, "bonding", NM_DEVICE_TYPE_DESC, "Bond", NM_DEVICE_DEVICE_TYPE, NM_DEVICE_TYPE_BOND, NM_DEVICE_LINK_TYPE, NM_LINK_TYPE_BOND, NULL); } NM_DEVICE_FACTORY_DEFINE_INTERNAL (BOND, Bond, bond, NM_DEVICE_FACTORY_DECLARE_LINK_TYPES (NM_LINK_TYPE_BOND) NM_DEVICE_FACTORY_DECLARE_SETTING_TYPES (NM_SETTING_BOND_SETTING_NAME), factory_class->create_device = create_device; );