/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Alexander Sack <asac@ubuntu.com>
* Copyright (C) 2007, 2008 Canonical Ltd.
* Copyright (C) 2009 - 2011 Red Hat, Inc.
*/
#include "src/core/nm-default-daemon.h"
#include "nms-ifupdown-plugin.h"
#include "nm-core-internal.h"
#include "nm-core-utils.h"
#include "nm-config.h"
#include "settings/nm-settings-plugin.h"
#include "settings/nm-settings-storage.h"
#include "nms-ifupdown-interface-parser.h"
#include "nms-ifupdown-parser.h"
#define ENI_INTERFACES_FILE "/etc/network/interfaces"
#define IFUPDOWN_UNMANAGE_WELL_KNOWN_DEFAULT TRUE
/*****************************************************************************/
typedef struct {
NMConnection * connection;
NMSettingsStorage *storage;
} StorageData;
typedef struct {
/* Stores an entry for blocks/interfaces read from /e/n/i and (if exists)
* the StorageData associated with the block.
*/
GHashTable *eni_ifaces;
bool ifupdown_managed : 1;
bool initialized : 1;
bool already_reloaded : 1;
} NMSIfupdownPluginPrivate;
struct _NMSIfupdownPlugin {
NMSettingsPlugin parent;
NMSIfupdownPluginPrivate _priv;
};
struct _NMSIfupdownPluginClass {
NMSettingsPluginClass parent;
};
G_DEFINE_TYPE(NMSIfupdownPlugin, nms_ifupdown_plugin, NM_TYPE_SETTINGS_PLUGIN)
#define NMS_IFUPDOWN_PLUGIN_GET_PRIVATE(self) \
_NM_GET_PRIVATE(self, NMSIfupdownPlugin, NMS_IS_IFUPDOWN_PLUGIN)
/*****************************************************************************/
#define _NMLOG_PREFIX_NAME "ifupdown"
#define _NMLOG_DOMAIN LOGD_SETTINGS
#define _NMLOG(level, ...) \
nm_log((level), \
_NMLOG_DOMAIN, \
NULL, \
NULL, \
"%s" _NM_UTILS_MACRO_FIRST(__VA_ARGS__), \
_NMLOG_PREFIX_NAME ": " _NM_UTILS_MACRO_REST(__VA_ARGS__))
/*****************************************************************************/
static GHashTable *load_eni_ifaces(NMSIfupdownPlugin *self);
/*****************************************************************************/
static void
_storage_data_destroy(StorageData *sd)
{
if (!sd)
return;
nm_g_object_unref(sd->connection);
nm_g_object_unref(sd->storage);
g_slice_free(StorageData, sd);
}
/*****************************************************************************/
static void
initialize(NMSIfupdownPlugin *self)
{
NMSIfupdownPluginPrivate *priv = NMS_IFUPDOWN_PLUGIN_GET_PRIVATE(self);
gboolean ifupdown_managed;
nm_assert(!priv->initialized);
priv->initialized = TRUE;
ifupdown_managed = nm_config_data_get_value_boolean(NM_CONFIG_GET_DATA_ORIG,
NM_CONFIG_KEYFILE_GROUP_IFUPDOWN,
NM_CONFIG_KEYFILE_KEY_IFUPDOWN_MANAGED,
!IFUPDOWN_UNMANAGE_WELL_KNOWN_DEFAULT);
_LOGI("management mode: %s", ifupdown_managed ? "managed" : "unmanaged");
priv->ifupdown_managed = ifupdown_managed;
priv->eni_ifaces = load_eni_ifaces(self);
}
static void
reload_connections(NMSettingsPlugin * plugin,
NMSettingsPluginConnectionLoadCallback callback,
gpointer user_data)
{
NMSIfupdownPlugin * self = NMS_IFUPDOWN_PLUGIN(plugin);
NMSIfupdownPluginPrivate *priv = NMS_IFUPDOWN_PLUGIN_GET_PRIVATE(self);
gs_unref_hashtable GHashTable *eni_ifaces_old = NULL;
GHashTableIter iter;
StorageData * sd;
StorageData * sd2;
const char * block_name;
if (!priv->initialized)
initialize(self);
else if (!priv->already_reloaded) {
/* This is the first call to reload, but we are already initialized.
*
* This happens because during start NMSettings first queries unmanaged-specs,
* and then issues a reload call right away.
*
* On future reloads, we really want to load /e/n/i again. */
priv->already_reloaded = TRUE;
} else {
eni_ifaces_old = priv->eni_ifaces;
priv->eni_ifaces = load_eni_ifaces(self);
g_hash_table_iter_init(&iter, eni_ifaces_old);
while (g_hash_table_iter_next(&iter, (gpointer *) &block_name, (gpointer *) &sd)) {
if (!sd)
continue;
sd2 = g_hash_table_lookup(priv->eni_ifaces, block_name);
if (!sd2)
continue;
nm_assert(nm_streq(nm_settings_storage_get_uuid(sd->storage),
nm_settings_storage_get_uuid(sd2->storage)));
nm_g_object_ref_set(&sd2->storage, sd->storage);
g_hash_table_iter_remove(&iter);
}
}
if (!priv->ifupdown_managed)
_LOGD("load: no connections due to managed=false");
g_hash_table_iter_init(&iter, priv->eni_ifaces);
while (g_hash_table_iter_next(&iter, NULL, (gpointer *) &sd)) {
gs_unref_object NMConnection *connection = NULL;
if (!sd)
continue;
connection = g_steal_pointer(&sd->connection);
if (!priv->ifupdown_managed)
continue;
_LOGD("load: %s (%s)",
nm_settings_storage_get_uuid(sd->storage),
nm_connection_get_id(connection));
callback(plugin, sd->storage, connection, user_data);
}
if (eni_ifaces_old && priv->ifupdown_managed) {
g_hash_table_iter_init(&iter, eni_ifaces_old);
while (g_hash_table_iter_next(&iter, NULL, (gpointer *) &sd)) {
if (!sd)
continue;
_LOGD("unload: %s", nm_settings_storage_get_uuid(sd->storage));
callback(plugin, sd->storage, NULL, user_data);
}
}
}
/*****************************************************************************/
static GSList *
_unmanaged_specs(GHashTable *eni_ifaces)
{
gs_free const char **keys = NULL;
GSList * specs = NULL;
guint i, len;
keys = nm_utils_strdict_get_keys(eni_ifaces, TRUE, &len);
for (i = len; i > 0;) {
i--;
specs = g_slist_prepend(specs,
g_strdup_printf(NM_MATCH_SPEC_INTERFACE_NAME_TAG "=%s", keys[i]));
}
return specs;
}
static GSList *
get_unmanaged_specs(NMSettingsPlugin *plugin)
{
NMSIfupdownPlugin * self = NMS_IFUPDOWN_PLUGIN(plugin);
NMSIfupdownPluginPrivate *priv = NMS_IFUPDOWN_PLUGIN_GET_PRIVATE(self);
if (G_UNLIKELY(!priv->initialized))
initialize(self);
if (priv->ifupdown_managed)
return NULL;
_LOGD("unmanaged-specs: unmanaged devices count %u", g_hash_table_size(priv->eni_ifaces));
return _unmanaged_specs(priv->eni_ifaces);
}
/*****************************************************************************/
static GHashTable *
load_eni_ifaces(NMSIfupdownPlugin *self)
{
gs_unref_hashtable GHashTable *eni_ifaces = NULL;
gs_unref_hashtable GHashTable *auto_ifaces = NULL;
nm_auto_ifparser if_parser *parser = NULL;
if_block * block;
StorageData * sd;
eni_ifaces = g_hash_table_new_full(nm_str_hash,
g_str_equal,
g_free,
(GDestroyNotify) _storage_data_destroy);
parser = ifparser_parse(ENI_INTERFACES_FILE, 0);
c_list_for_each_entry (block, &parser->block_lst_head, block_lst) {
if (NM_IN_STRSET(block->type, "auto", "allow-hotplug")) {
if (!auto_ifaces)
auto_ifaces = g_hash_table_new(nm_str_hash, g_str_equal);
g_hash_table_add(auto_ifaces, (char *) block->name);
}
}
c_list_for_each_entry (block, &parser->block_lst_head, block_lst) {
if (NM_IN_STRSET(block->type, "auto", "allow-hotplug"))
continue;
if (nm_streq(block->type, "iface")) {
gs_free_error GError *local = NULL;
gs_unref_object NMConnection *connection = NULL;
gs_unref_object NMSettingsStorage *storage = NULL;
const char * uuid = NULL;
StorageData * sd_repl;
/* Bridge configuration */
if (g_str_has_prefix(block->name, "br")) {
/* Try to find bridge ports */
const char *ports = ifparser_getkey(block, "bridge-ports");
if (ports) {
int state = 0;
gs_free const char **port_ifaces = NULL;
gsize i;
_LOGD("parse: found bridge ports %s for %s", ports, block->name);
port_ifaces = nm_utils_strsplit_set(ports, " \t");
for (i = 0; port_ifaces && port_ifaces[i]; i++) {
const char *token = port_ifaces[i];
/* Skip crazy stuff like regex or all */
if (nm_streq(token, "all"))
continue;
/* Small SM to skip everything inside regex */
if (nm_streq(token, "regex")) {
state++;
continue;
}
if (nm_streq(token, "noregex")) {
state--;
continue;
}
if (nm_streq(token, "none"))
continue;
if (state == 0) {
sd = g_hash_table_lookup(eni_ifaces, block->name);
if (!sd) {
_LOGD("parse: adding bridge port \"%s\"", token);
g_hash_table_insert(eni_ifaces, g_strdup(token), NULL);
} else {
_LOGD("parse: adding bridge port \"%s\" (have connection %s)",
token,
nm_settings_storage_get_uuid(sd->storage));
}
}
}
}
continue;
}
/* Skip loopback configuration */
if (nm_streq(block->name, "lo"))
continue;
sd_repl = g_hash_table_lookup(eni_ifaces, block->name);
if (sd_repl) {
_LOGD("parse: replace connection \"%s\" (%s)",
block->name,
nm_settings_storage_get_uuid(sd_repl->storage));
storage = g_steal_pointer(&sd_repl->storage);
g_hash_table_remove(eni_ifaces, block->name);
}
connection = ifupdown_new_connection_from_if_block(
block,
auto_ifaces && g_hash_table_contains(auto_ifaces, block->name),
&local);
if (!connection) {
_LOGD("parse: adding place holder for \"%s\"%s%s%s",
block->name,
NM_PRINT_FMT_QUOTED(local, " (", local->message, ")", ""));
sd = NULL;
} else {
nmtst_connection_assert_unchanging(connection);
uuid = nm_connection_get_uuid(connection);
if (!storage)
storage = nm_settings_storage_new(NM_SETTINGS_PLUGIN(self), uuid, NULL);
sd = g_slice_new(StorageData);
*sd = (StorageData){
.connection = g_steal_pointer(&connection),
.storage = g_steal_pointer(&storage),
};
_LOGD("parse: adding connection \"%s\" (%s)", block->name, uuid);
}
g_hash_table_replace(eni_ifaces, g_strdup(block->name), sd);
continue;
}
if (nm_streq(block->type, "mapping")) {
sd = g_hash_table_lookup(eni_ifaces, block->name);
if (!sd) {
_LOGD("parse: adding mapping \"%s\"", block->name);
g_hash_table_insert(eni_ifaces, g_strdup(block->name), NULL);
} else {
_LOGD("parse: adding mapping \"%s\" (have connection %s)",
block->name,
nm_settings_storage_get_uuid(sd->storage));
}
continue;
}
}
nm_clear_pointer(&auto_ifaces, g_hash_table_destroy);
return g_steal_pointer(&eni_ifaces);
}
/*****************************************************************************/
static void
nms_ifupdown_plugin_init(NMSIfupdownPlugin *self)
{}
static void
dispose(GObject *object)
{
NMSIfupdownPlugin * plugin = NMS_IFUPDOWN_PLUGIN(object);
NMSIfupdownPluginPrivate *priv = NMS_IFUPDOWN_PLUGIN_GET_PRIVATE(plugin);
nm_clear_pointer(&priv->eni_ifaces, g_hash_table_destroy);
G_OBJECT_CLASS(nms_ifupdown_plugin_parent_class)->dispose(object);
}
static void
nms_ifupdown_plugin_class_init(NMSIfupdownPluginClass *klass)
{
GObjectClass * object_class = G_OBJECT_CLASS(klass);
NMSettingsPluginClass *plugin_class = NM_SETTINGS_PLUGIN_CLASS(klass);
object_class->dispose = dispose;
plugin_class->plugin_name = "ifupdown";
plugin_class->reload_connections = reload_connections;
plugin_class->get_unmanaged_specs = get_unmanaged_specs;
}
/*****************************************************************************/
G_MODULE_EXPORT NMSettingsPlugin *
nm_settings_plugin_factory(void)
{
return g_object_new(NMS_TYPE_IFUPDOWN_PLUGIN, NULL);
}