// 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); /*****************************************************************************/ #define OPTIONS_APPLY_SUBSET \ NM_SETTING_BOND_OPTION_MIIMON, NM_SETTING_BOND_OPTION_UPDELAY, \ NM_SETTING_BOND_OPTION_DOWNDELAY, NM_SETTING_BOND_OPTION_ARP_INTERVAL, \ NM_SETTING_BOND_OPTION_ARP_VALIDATE, NM_SETTING_BOND_OPTION_PRIMARY, \ NM_SETTING_BOND_OPTION_AD_ACTOR_SYSTEM, NM_SETTING_BOND_OPTION_AD_ACTOR_SYS_PRIO, \ NM_SETTING_BOND_OPTION_AD_SELECT, NM_SETTING_BOND_OPTION_AD_USER_PORT_KEY, \ NM_SETTING_BOND_OPTION_ALL_SLAVES_ACTIVE, NM_SETTING_BOND_OPTION_ARP_ALL_TARGETS, \ NM_SETTING_BOND_OPTION_FAIL_OVER_MAC, NM_SETTING_BOND_OPTION_LACP_RATE, \ NM_SETTING_BOND_OPTION_LP_INTERVAL, NM_SETTING_BOND_OPTION_MIN_LINKS, \ NM_SETTING_BOND_OPTION_PACKETS_PER_SLAVE, NM_SETTING_BOND_OPTION_PRIMARY_RESELECT, \ NM_SETTING_BOND_OPTION_RESEND_IGMP, NM_SETTING_BOND_OPTION_TLB_DYNAMIC_LB, \ NM_SETTING_BOND_OPTION_USE_CARRIER, NM_SETTING_BOND_OPTION_XMIT_HASH_POLICY, \ NM_SETTING_BOND_OPTION_NUM_GRAT_ARP #define OPTIONS_REAPPLY_SUBSET \ NM_SETTING_BOND_OPTION_MIIMON, NM_SETTING_BOND_OPTION_UPDELAY, \ NM_SETTING_BOND_OPTION_DOWNDELAY, NM_SETTING_BOND_OPTION_ARP_INTERVAL, \ NM_SETTING_BOND_OPTION_ARP_VALIDATE, NM_SETTING_BOND_OPTION_PRIMARY, \ NM_SETTING_BOND_OPTION_AD_ACTOR_SYSTEM, NM_SETTING_BOND_OPTION_AD_ACTOR_SYS_PRIO, \ NM_SETTING_BOND_OPTION_ALL_SLAVES_ACTIVE, NM_SETTING_BOND_OPTION_ARP_ALL_TARGETS, \ NM_SETTING_BOND_OPTION_FAIL_OVER_MAC, NM_SETTING_BOND_OPTION_LP_INTERVAL, \ NM_SETTING_BOND_OPTION_MIN_LINKS, NM_SETTING_BOND_OPTION_PACKETS_PER_SLAVE, \ NM_SETTING_BOND_OPTION_PRIMARY_RESELECT, NM_SETTING_BOND_OPTION_RESEND_IGMP, \ NM_SETTING_BOND_OPTION_USE_CARRIER, NM_SETTING_BOND_OPTION_XMIT_HASH_POLICY, \ NM_SETTING_BOND_OPTION_NUM_GRAT_ARP #define OPTIONS_REAPPLY_FULL \ OPTIONS_REAPPLY_SUBSET, NM_SETTING_BOND_OPTION_ACTIVE_SLAVE, \ NM_SETTING_BOND_OPTION_ARP_IP_TARGET /*****************************************************************************/ 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(NULL); for (; options[0]; options++) { const char * option = options[0]; gs_free char *value = NULL; char * p; if (NM_IN_STRSET(option, NM_SETTING_BOND_OPTION_ACTIVE_SLAVE)) continue; value = nm_platform_sysctl_master_get_option(nm_device_get_platform(device), ifindex, option); if (value && _nm_setting_bond_get_option_type(s_bond, option) == NM_BOND_OPTION_TYPE_BOTH) { p = strchr(value, ' '); if (p) *p = '\0'; } if (mode == NM_BOND_MODE_UNKNOWN) { if (value && nm_streq(option, 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(option, mode)) continue; if (value && value[0] && !ignore_option(s_bond, option, value)) { /* Replace " " with "," for arp_ip_targets from the kernel */ if (nm_streq(option, NM_SETTING_BOND_OPTION_ARP_IP_TARGET)) { for (p = value; *p; p++) { if (*p == ' ') *p = ','; } } nm_setting_bond_add_option(s_bond, option, 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, 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_attrs_or_default(NMDevice *device, NMSettingBond *s_bond, const char *const *attr_v) { nm_assert(NM_IS_DEVICE(device)); nm_assert(s_bond); nm_assert(attr_v); for (; *attr_v; ++attr_v) set_bond_attr_or_default(device, s_bond, *attr_v); } static void set_bond_arp_ip_targets(NMDevice *device, NMSettingBond *s_bond) { int ifindex = nm_device_get_ifindex(device); gs_free char *cur_arp_ip_target = NULL; /* 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, cur_arp_ip_target, nm_setting_bond_get_option_or_default(s_bond, NM_SETTING_BOND_OPTION_ARP_IP_TARGET)); } static gboolean apply_bonding_config(NMDeviceBond *self) { NMDevice * device = NM_DEVICE(self); NMSettingBond *s_bond; NMBondMode mode; const char * mode_str; 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_arp_ip_targets(device, s_bond); set_bond_attrs_or_default(device, s_bond, NM_MAKE_STRV(OPTIONS_APPLY_SUBSET)); 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); nm_device_master_check_slave_physical_port(device, slave, LOGD_BOND); if (configure) { gboolean success; 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) { _LOGI(LOGD_BOND, "enslaved bond slave %s: failed", nm_device_get_ip_iface(slave)); return FALSE; } _LOGI(LOGD_BOND, "enslaved bond slave %s", nm_device_get_ip_iface(slave)); } else _LOGI(LOGD_BOND, "bond slave %s was enslaved", nm_device_get_ip_iface(slave)); 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 can_reapply_change(NMDevice * device, const char *setting_name, NMSetting * s_old, NMSetting * s_new, GHashTable *diffs, GError ** error) { NMDeviceClass *device_class; /* Only handle bond setting here, delegate other settings to parent class */ if (nm_streq(setting_name, NM_SETTING_BOND_SETTING_NAME)) { NMSettingBond *s_a = NM_SETTING_BOND(s_old); NMSettingBond *s_b = NM_SETTING_BOND(s_new); const char ** option_list; if (!nm_device_hash_check_invalid_keys(diffs, NM_SETTING_BOND_SETTING_NAME, error, NM_SETTING_BOND_OPTIONS)) return FALSE; option_list = nm_setting_bond_get_valid_options(NULL); for (; *option_list; ++option_list) { const char *name = *option_list; /* We support changes to these */ if (NM_IN_STRSET(name, OPTIONS_REAPPLY_FULL)) continue; /* Reject any other changes */ if (!nm_streq0(nm_setting_bond_get_option_normalized(s_a, name), nm_setting_bond_get_option_normalized(s_b, name))) { g_set_error(error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_INCOMPATIBLE_CONNECTION, "Can't reapply '%s' bond option", name); 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); NMSettingBond *s_bond; const char * value; 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); /* Below we set only the bond options that kernel allows to modify * while keeping the bond interface up */ set_bond_arp_ip_targets(device, s_bond); set_bond_attrs_or_default(device, s_bond, NM_MAKE_STRV(OPTIONS_REAPPLY_SUBSET)); } /*****************************************************************************/ 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;);