diff options
author | Beniamino Galvani <bgalvani@redhat.com> | 2020-10-28 10:12:29 +0100 |
---|---|---|
committer | Beniamino Galvani <bgalvani@redhat.com> | 2020-11-09 09:08:48 +0100 |
commit | 418dd277813236f277c162df3f3163f439f0d6eb (patch) | |
tree | e541bfb005752b9d78210dc12135ad23a86b9ad5 | |
parent | 51b73ae63ab7d00016aee095649d1c5912e0d5e8 (diff) | |
download | NetworkManager-418dd277813236f277c162df3f3163f439f0d6eb.tar.gz |
dns: sd-resolved: reset interface configuration on deactivation
If an update doesn't contain an interface but the previous update did,
the systemd-resolved DNS plugin must send a request to clear the
previous configuration. Otherwise the previous DNS configuration would
persist even after interface deactivation.
https://bugzilla.redhat.com/show_bug.cgi?id=1888229
https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/662
(cherry picked from commit f70ee67058c92a97549dc4aca11ef0567373efbf)
(cherry picked from commit a9c952d34cb6ed2e09091da64300337f29973b77)
(cherry picked from commit c1e6d4e8a16ac419c66feb1de649a2f0abc53ee6)
-rw-r--r-- | src/dns/nm-dns-systemd-resolved.c | 51 |
1 files changed, 44 insertions, 7 deletions
diff --git a/src/dns/nm-dns-systemd-resolved.c b/src/dns/nm-dns-systemd-resolved.c index 4ab13a91ff..f7a7b6c935 100644 --- a/src/dns/nm-dns-systemd-resolved.c +++ b/src/dns/nm-dns-systemd-resolved.c @@ -51,6 +51,7 @@ typedef struct { typedef struct { GDBusConnection *dbus_connection; + GHashTable *dirty_interfaces; GCancellable *cancellable; CList request_queue_lst_head; guint name_owner_changed_id; @@ -135,7 +136,7 @@ call_done (GObject *source, GAsyncResult *r, gpointer user_data) priv->send_updates_warn_ratelimited = FALSE; } -static void +static gboolean update_add_ip_config (NMDnsSystemdResolved *self, GVariantBuilder *dns, GVariantBuilder *domains, @@ -147,12 +148,13 @@ update_add_ip_config (NMDnsSystemdResolved *self, gboolean is_routing; const char **iter; const char *domain; + gboolean has_config = FALSE; addr_family = nm_ip_config_get_addr_family (data->ip_config); addr_size = nm_utils_addr_family_to_size (addr_family); if (!data->domains.search || !data->domains.search[0]) - return; + return FALSE; n = nm_ip_config_get_num_nameservers (data->ip_config); for (i = 0 ; i < n; i++) { @@ -164,12 +166,16 @@ update_add_ip_config (NMDnsSystemdResolved *self, addr_size, 1)); g_variant_builder_close (dns); + has_config = TRUE; } for (iter = data->domains.search; *iter; iter++) { domain = nm_utils_parse_dns_domain (*iter, &is_routing); g_variant_builder_add (domains, "(sb)", domain[0] ? domain : ".", is_routing); + has_config = TRUE; } + + return has_config; } static void @@ -184,7 +190,7 @@ free_pending_updates (NMDnsSystemdResolved *self) _request_item_free (request_item); } -static void +static gboolean prepare_one_interface (NMDnsSystemdResolved *self, InterfaceConfig *ic) { NMDnsSystemdResolvedPrivate *priv = NM_DNS_SYSTEMD_RESOLVED_GET_PRIVATE (self); @@ -193,6 +199,7 @@ prepare_one_interface (NMDnsSystemdResolved *self, InterfaceConfig *ic) NMSettingConnectionMdns mdns = NM_SETTING_CONNECTION_MDNS_DEFAULT; NMSettingConnectionLlmnr llmnr = NM_SETTING_CONNECTION_LLMNR_DEFAULT; const char *mdns_arg = NULL, *llmnr_arg = NULL; + gboolean has_config = FALSE; g_variant_builder_init (&dns, G_VARIANT_TYPE ("(ia(iay))")); g_variant_builder_add (&dns, "i", ic->ifindex); @@ -206,7 +213,7 @@ prepare_one_interface (NMDnsSystemdResolved *self, InterfaceConfig *ic) NMDnsIPConfigData *data = elem->data; NMIPConfig *ip_config = data->ip_config; - update_add_ip_config (self, &dns, &domains, data); + has_config |= update_add_ip_config (self, &dns, &domains, data); if (NM_IS_IP4_CONFIG (ip_config)) { mdns = NM_MAX (mdns, nm_ip4_config_mdns_get (NM_IP4_CONFIG (ip_config))); @@ -249,6 +256,9 @@ prepare_one_interface (NMDnsSystemdResolved *self, InterfaceConfig *ic) } nm_assert (llmnr_arg); + if (nm_str_not_empty (mdns_arg) || nm_str_not_empty (llmnr_arg)) + has_config = TRUE; + _request_item_append (&priv->request_queue_lst_head, "SetLinkDNS", g_variant_builder_end (&dns)); @@ -261,6 +271,8 @@ prepare_one_interface (NMDnsSystemdResolved *self, InterfaceConfig *ic) _request_item_append (&priv->request_queue_lst_head, "SetLinkLLMNR", g_variant_new ("(is)", ic->ifindex, llmnr_arg ?: "")); + + return has_config; } static void @@ -341,18 +353,20 @@ update (NMDnsPlugin *plugin, GError **error) { NMDnsSystemdResolved *self = NM_DNS_SYSTEMD_RESOLVED (plugin); + NMDnsSystemdResolvedPrivate *priv = NM_DNS_SYSTEMD_RESOLVED_GET_PRIVATE (self); gs_unref_hashtable GHashTable *interfaces = NULL; gs_free gpointer *interfaces_keys = NULL; guint interfaces_len; - guint i; + int ifindex; NMDnsIPConfigData *ip_data; + GHashTableIter iter; + guint i; interfaces = g_hash_table_new_full (nm_direct_hash, NULL, NULL, (GDestroyNotify) _interface_config_free); c_list_for_each_entry (ip_data, ip_config_lst_head, ip_config_lst) { InterfaceConfig *ic = NULL; - int ifindex; ifindex = ip_data->data->ifindex; nm_assert (ifindex == nm_ip_config_get_ifindex (ip_data->ip_config)); @@ -378,7 +392,28 @@ update (NMDnsPlugin *plugin, for (i = 0; i < interfaces_len; i++) { InterfaceConfig *ic = g_hash_table_lookup (interfaces, GINT_TO_POINTER (interfaces_keys[i])); - prepare_one_interface (self, ic); + if (prepare_one_interface (self, ic)) + g_hash_table_add (priv->dirty_interfaces, GINT_TO_POINTER (ic->ifindex)); + else + g_hash_table_remove (priv->dirty_interfaces, GINT_TO_POINTER (ic->ifindex)); + } + + /* If we previously configured an ifindex with non-empty values in + * resolved, and the current update doesn't contain that interface, + * reset the resolved configuration for that ifindex. */ + g_hash_table_iter_init (&iter, priv->dirty_interfaces); + while (g_hash_table_iter_next (&iter, (gpointer *) &ifindex, NULL)) { + if (!g_hash_table_contains (interfaces, GINT_TO_POINTER (ifindex))) { + InterfaceConfig ic; + + _LOGT ("clear previously configured ifindex %d", ifindex); + ic = (InterfaceConfig) { + .ifindex = ifindex, + .configs_lst_head = C_LIST_INIT (ic.configs_lst_head), + }; + prepare_one_interface (self, &ic); + g_hash_table_iter_remove (&iter); + } } send_updates (self); @@ -505,6 +540,8 @@ nm_dns_systemd_resolved_init (NMDnsSystemdResolved *self) priv->cancellable, get_name_owner_cb, self); + + priv->dirty_interfaces = g_hash_table_new (nm_direct_hash, NULL); } NMDnsPlugin * |