/* SPDX-License-Identifier: LGPL-2.1+ */ #include "nm-default.h" #include "nmp-rules-manager.h" #include #include #include "nm-std-aux/c-list-util.h" #include "nmp-object.h" /*****************************************************************************/ struct _NMPRulesManager { NMPlatform *platform; GHashTable *by_obj; GHashTable *by_user_tag; GHashTable *by_data; guint ref_count; }; /*****************************************************************************/ static void _rules_init(NMPRulesManager *self); /*****************************************************************************/ #define _NMLOG_DOMAIN LOGD_PLATFORM #define _NMLOG_PREFIX_NAME "rules-manager" #define _NMLOG(level, ...) \ G_STMT_START \ { \ const NMLogLevel __level = (level); \ \ if (nm_logging_enabled(__level, _NMLOG_DOMAIN)) { \ _nm_log(__level, \ _NMLOG_DOMAIN, \ 0, \ NULL, \ NULL, \ "%s: " _NM_UTILS_MACRO_FIRST(__VA_ARGS__), \ _NMLOG_PREFIX_NAME _NM_UTILS_MACRO_REST(__VA_ARGS__)); \ } \ } \ G_STMT_END /*****************************************************************************/ static gboolean NMP_IS_RULES_MANAGER(gpointer self) { return self && ((NMPRulesManager *) self)->ref_count > 0 && NM_IS_PLATFORM(((NMPRulesManager *) self)->platform); } #define _USER_TAG_LOG(user_tag) nm_hash_obfuscate_ptr(1240261787u, (user_tag)) /*****************************************************************************/ typedef struct { const NMPObject *obj; gconstpointer user_tag; CList obj_lst; CList user_tag_lst; /* track_priority_val zero is special: those are weakly tracked rules. * That means: NetworkManager will restore them only if it removed them earlier. * But it will not remove or add them otherwise. * * Otherwise, the track_priority_val goes together with track_priority_present. * In case of one rule being tracked multiple times (with different priorities), * the one with higher priority wins. See _rules_obj_get_best_data(). * Then, the winning present state either enforces that the rule is present * or absent. * * If a rules is not tracked at all, it is ignored by NetworkManager. Assuming * that it was added externally by the user. But unlike weakly tracked rules, * NM will *not* restore such rules if NetworkManager themself removed them. */ guint32 track_priority_val; bool track_priority_present : 1; bool dirty : 1; } RulesData; typedef enum { CONFIG_STATE_NONE = 0, CONFIG_STATE_ADDED_BY_US = 1, CONFIG_STATE_REMOVED_BY_US = 2, /* ConfigState encodes whether the rule was touched by us at all (CONFIG_STATE_NONE). * * Maybe we would only need to track whether we touched the rule at all. But we * track it more in detail what we did: did we add it (CONFIG_STATE_ADDED_BY_US) * or did we remove it (CONFIG_STATE_REMOVED_BY_US)? * Finally, we need CONFIG_STATE_OWNED_BY_US, which means that we didn't actively * add/remove it, but whenever we are about to undo the add/remove, we need to do it. * In that sense, CONFIG_STATE_OWNED_BY_US is really just a flag that we unconditionally * force the state next time when necessary. */ CONFIG_STATE_OWNED_BY_US = 3, } ConfigState; typedef struct { const NMPObject *obj; CList obj_lst_head; /* indicates whether we configured/removed the rule (during sync()). We need that, so * if the rule gets untracked, that we know to remove/restore it. * * This makes NMPRulesManager stateful (beyond the configuration that indicates * which rules are tracked). * After a restart, NetworkManager would no longer remember which rules were added * by us. * * That is partially fixed by NetworkManager taking over the rules that it * actively configures (see %NMP_RULES_MANAGER_EXTERN_WEAKLY_TRACKED_USER_TAG). */ ConfigState config_state; } RulesObjData; typedef struct { gconstpointer user_tag; CList user_tag_lst_head; } RulesUserTagData; /*****************************************************************************/ static void _rules_data_untrack(NMPRulesManager *self, RulesData * rules_data, gboolean remove_user_tag_data, gboolean make_owned_by_us); /*****************************************************************************/ static void _rules_data_assert(const RulesData *rules_data, gboolean linked) { nm_assert(rules_data); nm_assert(NMP_OBJECT_GET_TYPE(rules_data->obj) == NMP_OBJECT_TYPE_ROUTING_RULE); nm_assert(nmp_object_is_visible(rules_data->obj)); nm_assert(rules_data->user_tag); nm_assert(!linked || !c_list_is_empty(&rules_data->obj_lst)); nm_assert(!linked || !c_list_is_empty(&rules_data->user_tag_lst)); } static guint _rules_data_hash(gconstpointer data) { const RulesData *rules_data = data; NMHashState h; _rules_data_assert(rules_data, FALSE); nm_hash_init(&h, 269297543u); nm_platform_routing_rule_hash_update(NMP_OBJECT_CAST_ROUTING_RULE(rules_data->obj), NM_PLATFORM_ROUTING_RULE_CMP_TYPE_ID, &h); nm_hash_update_val(&h, rules_data->user_tag); return nm_hash_complete(&h); } static gboolean _rules_data_equal(gconstpointer data_a, gconstpointer data_b) { const RulesData *rules_data_a = data_a; const RulesData *rules_data_b = data_b; _rules_data_assert(rules_data_a, FALSE); _rules_data_assert(rules_data_b, FALSE); return rules_data_a->user_tag == rules_data_b->user_tag && (nm_platform_routing_rule_cmp(NMP_OBJECT_CAST_ROUTING_RULE(rules_data_a->obj), NMP_OBJECT_CAST_ROUTING_RULE(rules_data_b->obj), NM_PLATFORM_ROUTING_RULE_CMP_TYPE_ID) == 0); } static void _rules_data_destroy(gpointer data) { RulesData *rules_data = data; _rules_data_assert(rules_data, FALSE); c_list_unlink_stale(&rules_data->obj_lst); c_list_unlink_stale(&rules_data->user_tag_lst); nmp_object_unref(rules_data->obj); g_slice_free(RulesData, rules_data); } static const RulesData * _rules_obj_get_best_data(RulesObjData *obj_data) { RulesData * rules_data; const RulesData *rd_best = NULL; c_list_for_each_entry (rules_data, &obj_data->obj_lst_head, obj_lst) { _rules_data_assert(rules_data, TRUE); if (rd_best) { if (rd_best->track_priority_val > rules_data->track_priority_val) continue; if (rd_best->track_priority_val == rules_data->track_priority_val) { if (rd_best->track_priority_present || !rules_data->track_priority_present) { /* if the priorities are identical, then "present" wins over * "!present" (absent). */ continue; } } } rd_best = rules_data; } return rd_best; } static guint _rules_obj_hash(gconstpointer data) { const RulesObjData *obj_data = data; NMHashState h; nm_hash_init(&h, 432817559u); nm_platform_routing_rule_hash_update(NMP_OBJECT_CAST_ROUTING_RULE(obj_data->obj), NM_PLATFORM_ROUTING_RULE_CMP_TYPE_ID, &h); return nm_hash_complete(&h); } static gboolean _rules_obj_equal(gconstpointer data_a, gconstpointer data_b) { const RulesObjData *obj_data_a = data_a; const RulesObjData *obj_data_b = data_b; return (nm_platform_routing_rule_cmp(NMP_OBJECT_CAST_ROUTING_RULE(obj_data_a->obj), NMP_OBJECT_CAST_ROUTING_RULE(obj_data_b->obj), NM_PLATFORM_ROUTING_RULE_CMP_TYPE_ID) == 0); } static void _rules_obj_destroy(gpointer data) { RulesObjData *obj_data = data; c_list_unlink_stale(&obj_data->obj_lst_head); nmp_object_unref(obj_data->obj); g_slice_free(RulesObjData, obj_data); } static guint _rules_user_tag_hash(gconstpointer data) { const RulesUserTagData *user_tag_data = data; return nm_hash_val(644693447u, user_tag_data->user_tag); } static gboolean _rules_user_tag_equal(gconstpointer data_a, gconstpointer data_b) { const RulesUserTagData *user_tag_data_a = data_a; const RulesUserTagData *user_tag_data_b = data_b; return user_tag_data_a->user_tag == user_tag_data_b->user_tag; } static void _rules_user_tag_destroy(gpointer data) { RulesUserTagData *user_tag_data = data; c_list_unlink_stale(&user_tag_data->user_tag_lst_head); g_slice_free(RulesUserTagData, user_tag_data); } static RulesData * _rules_data_lookup(GHashTable *by_data, const NMPObject *obj, gconstpointer user_tag) { RulesData rules_data_needle = { .obj = obj, .user_tag = user_tag, }; return g_hash_table_lookup(by_data, &rules_data_needle); } /** * nmp_rules_manager_track: * @self: the #NMPRulesManager instance * @routing_rule: the #NMPlatformRoutingRule to track or untrack * @track_priority: the priority for tracking the rule. Note that * negative values indicate a forced absence of the rule. Priorities * are compared with their absolute values (with higher absolute * value being more important). For example, if you track the same * rule twice, once with priority -5 and +10, then the rule is * present (because the positive number is more important). * The special value 0 indicates weakly-tracked rules. * @user_tag: the tag associated with tracking this rule. The same tag * must be used to untrack the rule later. * @user_tag_untrack: if not %NULL, at the same time untrack this user-tag * for the same rule. Note that this is different from a plain nmp_rules_manager_untrack(), * because it enforces ownership of the now tracked rule. On the other hand, * a plain nmp_rules_manager_untrack() merely forgets about the tracking. * The purpose here is to set this to %NMP_RULES_MANAGER_EXTERN_WEAKLY_TRACKED_USER_TAG. */ void nmp_rules_manager_track(NMPRulesManager * self, const NMPlatformRoutingRule *routing_rule, gint32 track_priority, gconstpointer user_tag, gconstpointer user_tag_untrack) { NMPObject obj_stack; const NMPObject * p_obj_stack; RulesData * rules_data; RulesObjData * obj_data; RulesUserTagData *user_tag_data; gboolean changed = FALSE; guint32 track_priority_val; gboolean track_priority_present; g_return_if_fail(NMP_IS_RULES_MANAGER(self)); g_return_if_fail(routing_rule); g_return_if_fail(user_tag); nm_assert(track_priority != G_MININT32); _rules_init(self); p_obj_stack = nmp_object_stackinit(&obj_stack, NMP_OBJECT_TYPE_ROUTING_RULE, routing_rule); nm_assert(nmp_object_is_visible(p_obj_stack)); if (track_priority >= 0) { track_priority_val = track_priority; track_priority_present = TRUE; } else { track_priority_val = -track_priority; track_priority_present = FALSE; } rules_data = _rules_data_lookup(self->by_data, p_obj_stack, user_tag); if (!rules_data) { rules_data = g_slice_new(RulesData); *rules_data = (RulesData){ .obj = nm_dedup_multi_index_obj_intern(nm_platform_get_multi_idx(self->platform), p_obj_stack), .user_tag = user_tag, .track_priority_val = track_priority_val, .track_priority_present = track_priority_present, .dirty = FALSE, }; g_hash_table_add(self->by_data, rules_data); obj_data = g_hash_table_lookup(self->by_obj, &rules_data->obj); if (!obj_data) { obj_data = g_slice_new(RulesObjData); *obj_data = (RulesObjData){ .obj = nmp_object_ref(rules_data->obj), .obj_lst_head = C_LIST_INIT(obj_data->obj_lst_head), .config_state = CONFIG_STATE_NONE, }; g_hash_table_add(self->by_obj, obj_data); } c_list_link_tail(&obj_data->obj_lst_head, &rules_data->obj_lst); user_tag_data = g_hash_table_lookup(self->by_user_tag, &rules_data->user_tag); if (!user_tag_data) { user_tag_data = g_slice_new(RulesUserTagData); *user_tag_data = (RulesUserTagData){ .user_tag = user_tag, .user_tag_lst_head = C_LIST_INIT(user_tag_data->user_tag_lst_head), }; g_hash_table_add(self->by_user_tag, user_tag_data); } c_list_link_tail(&user_tag_data->user_tag_lst_head, &rules_data->user_tag_lst); changed = TRUE; } else { rules_data->dirty = FALSE; if (rules_data->track_priority_val != track_priority_val || rules_data->track_priority_present != track_priority_present) { rules_data->track_priority_val = track_priority_val; rules_data->track_priority_present = track_priority_present; changed = TRUE; } } if (user_tag_untrack) { if (user_tag != user_tag_untrack) { RulesData *rules_data_untrack; rules_data_untrack = _rules_data_lookup(self->by_data, p_obj_stack, user_tag_untrack); if (rules_data_untrack) _rules_data_untrack(self, rules_data_untrack, FALSE, TRUE); } else nm_assert_not_reached(); } _rules_data_assert(rules_data, TRUE); if (changed) { _LOGD("routing-rule: track [" NM_HASH_OBFUSCATE_PTR_FMT ",%s%u] \"%s\")", _USER_TAG_LOG(rules_data->user_tag), (rules_data->track_priority_val == 0 ? "" : (rules_data->track_priority_present ? "+" : "-")), (guint) rules_data->track_priority_val, nmp_object_to_string(rules_data->obj, NMP_OBJECT_TO_STRING_PUBLIC, NULL, 0)); } } static void _rules_data_untrack(NMPRulesManager *self, RulesData * rules_data, gboolean remove_user_tag_data, gboolean make_owned_by_us) { RulesObjData *obj_data; nm_assert(NMP_IS_RULES_MANAGER(self)); _rules_data_assert(rules_data, TRUE); nm_assert(self->by_data); nm_assert(g_hash_table_lookup(self->by_data, rules_data) == rules_data); _LOGD("routing-rule: untrack [" NM_HASH_OBFUSCATE_PTR_FMT "] \"%s\"", _USER_TAG_LOG(rules_data->user_tag), nmp_object_to_string(rules_data->obj, NMP_OBJECT_TO_STRING_PUBLIC, NULL, 0)); #if NM_MORE_ASSERTS { RulesUserTagData *user_tag_data; user_tag_data = g_hash_table_lookup(self->by_user_tag, &rules_data->user_tag); nm_assert(user_tag_data); nm_assert(c_list_contains(&user_tag_data->user_tag_lst_head, &rules_data->user_tag_lst)); } #endif nm_assert(!c_list_is_empty(&rules_data->user_tag_lst)); obj_data = g_hash_table_lookup(self->by_obj, &rules_data->obj); nm_assert(obj_data); nm_assert(c_list_contains(&obj_data->obj_lst_head, &rules_data->obj_lst)); nm_assert(obj_data == g_hash_table_lookup(self->by_obj, &rules_data->obj)); if (make_owned_by_us) { if (obj_data->config_state == CONFIG_STATE_NONE) { /* we need to mark this entry that it requires a touch on the next * sync. */ obj_data->config_state = CONFIG_STATE_OWNED_BY_US; } } else if (remove_user_tag_data && c_list_length_is(&rules_data->user_tag_lst, 1)) g_hash_table_remove(self->by_user_tag, &rules_data->user_tag); /* if obj_data is marked to be "added_by_us" or "removed_by_us", we need to keep this entry * around for the next sync -- so that we can undo what we did earlier. */ if (obj_data->config_state == CONFIG_STATE_NONE && c_list_length_is(&rules_data->obj_lst, 1)) g_hash_table_remove(self->by_obj, &rules_data->obj); g_hash_table_remove(self->by_data, rules_data); } void nmp_rules_manager_untrack(NMPRulesManager * self, const NMPlatformRoutingRule *routing_rule, gconstpointer user_tag) { NMPObject obj_stack; const NMPObject *p_obj_stack; RulesData * rules_data; g_return_if_fail(NMP_IS_RULES_MANAGER(self)); g_return_if_fail(routing_rule); g_return_if_fail(user_tag); _rules_init(self); p_obj_stack = nmp_object_stackinit(&obj_stack, NMP_OBJECT_TYPE_ROUTING_RULE, routing_rule); nm_assert(nmp_object_is_visible(p_obj_stack)); rules_data = _rules_data_lookup(self->by_data, p_obj_stack, user_tag); if (rules_data) _rules_data_untrack(self, rules_data, TRUE, FALSE); } void nmp_rules_manager_set_dirty(NMPRulesManager *self, gconstpointer user_tag) { RulesData * rules_data; RulesUserTagData *user_tag_data; g_return_if_fail(NMP_IS_RULES_MANAGER(self)); g_return_if_fail(user_tag); if (!self->by_data) return; user_tag_data = g_hash_table_lookup(self->by_user_tag, &user_tag); if (!user_tag_data) return; c_list_for_each_entry (rules_data, &user_tag_data->user_tag_lst_head, user_tag_lst) rules_data->dirty = TRUE; } void nmp_rules_manager_untrack_all(NMPRulesManager *self, gconstpointer user_tag, gboolean all /* or only dirty */) { RulesData * rules_data; RulesData * rules_data_safe; RulesUserTagData *user_tag_data; g_return_if_fail(NMP_IS_RULES_MANAGER(self)); g_return_if_fail(user_tag); if (!self->by_data) return; user_tag_data = g_hash_table_lookup(self->by_user_tag, &user_tag); if (!user_tag_data) return; c_list_for_each_entry_safe (rules_data, rules_data_safe, &user_tag_data->user_tag_lst_head, user_tag_lst) { if (all || rules_data->dirty) _rules_data_untrack(self, rules_data, FALSE, FALSE); } if (c_list_is_empty(&user_tag_data->user_tag_lst_head)) g_hash_table_remove(self->by_user_tag, user_tag_data); } void nmp_rules_manager_sync(NMPRulesManager *self, gboolean keep_deleted_rules) { const NMDedupMultiHeadEntry *pl_head_entry; NMDedupMultiIter pl_iter; const NMPObject * plobj; gs_unref_ptrarray GPtrArray *rules_to_delete = NULL; RulesObjData * obj_data; GHashTableIter h_iter; guint i; const RulesData * rd_best; g_return_if_fail(NMP_IS_RULES_MANAGER(self)); if (!self->by_data) return; _LOGD("sync%s", keep_deleted_rules ? " (don't remove any rules)" : ""); pl_head_entry = nm_platform_lookup_obj_type(self->platform, NMP_OBJECT_TYPE_ROUTING_RULE); if (pl_head_entry) { nmp_cache_iter_for_each (&pl_iter, pl_head_entry, &plobj) { obj_data = g_hash_table_lookup(self->by_obj, &plobj); if (!obj_data) { /* this rule is not tracked. It was externally added, hence we * ignore it. */ continue; } rd_best = _rules_obj_get_best_data(obj_data); if (rd_best) { if (rd_best->track_priority_present) { if (obj_data->config_state == CONFIG_STATE_OWNED_BY_US) obj_data->config_state = CONFIG_STATE_ADDED_BY_US; continue; } if (rd_best->track_priority_val == 0) { if (!NM_IN_SET(obj_data->config_state, CONFIG_STATE_ADDED_BY_US, CONFIG_STATE_OWNED_BY_US)) { obj_data->config_state = CONFIG_STATE_NONE; continue; } obj_data->config_state = CONFIG_STATE_NONE; } } if (keep_deleted_rules) { _LOGD("forget/leak rule added by us: %s", nmp_object_to_string(plobj, NMP_OBJECT_TO_STRING_PUBLIC, NULL, 0)); continue; } if (!rules_to_delete) rules_to_delete = g_ptr_array_new_with_free_func((GDestroyNotify) nmp_object_unref); g_ptr_array_add(rules_to_delete, (gpointer) nmp_object_ref(plobj)); obj_data->config_state = CONFIG_STATE_REMOVED_BY_US; } } if (rules_to_delete) { for (i = 0; i < rules_to_delete->len; i++) nm_platform_object_delete(self->platform, rules_to_delete->pdata[i]); } g_hash_table_iter_init(&h_iter, self->by_obj); while (g_hash_table_iter_next(&h_iter, (gpointer *) &obj_data, NULL)) { rd_best = _rules_obj_get_best_data(obj_data); if (!rd_best) { g_hash_table_iter_remove(&h_iter); continue; } if (!rd_best->track_priority_present) { if (obj_data->config_state == CONFIG_STATE_OWNED_BY_US) obj_data->config_state = CONFIG_STATE_REMOVED_BY_US; continue; } if (rd_best->track_priority_val == 0) { if (!NM_IN_SET(obj_data->config_state, CONFIG_STATE_REMOVED_BY_US, CONFIG_STATE_OWNED_BY_US)) { obj_data->config_state = CONFIG_STATE_NONE; continue; } obj_data->config_state = CONFIG_STATE_NONE; } plobj = nm_platform_lookup_obj(self->platform, NMP_CACHE_ID_TYPE_OBJECT_TYPE, obj_data->obj); if (plobj) continue; obj_data->config_state = CONFIG_STATE_ADDED_BY_US; nm_platform_routing_rule_add(self->platform, NMP_NLM_FLAG_ADD, NMP_OBJECT_CAST_ROUTING_RULE(obj_data->obj)); } } void nmp_rules_manager_track_from_platform(NMPRulesManager *self, NMPlatform * platform, int addr_family, gint32 tracking_priority, gconstpointer user_tag) { NMPLookup lookup; const NMDedupMultiHeadEntry *head_entry; NMDedupMultiIter iter; const NMPObject * o; g_return_if_fail(NMP_IS_RULES_MANAGER(self)); if (!platform) platform = self->platform; else g_return_if_fail(NM_IS_PLATFORM(platform)); nm_assert(NM_IN_SET(addr_family, AF_UNSPEC, AF_INET, AF_INET6)); nmp_lookup_init_obj_type(&lookup, NMP_OBJECT_TYPE_ROUTING_RULE); head_entry = nm_platform_lookup(platform, &lookup); nmp_cache_iter_for_each (&iter, head_entry, &o) { const NMPlatformRoutingRule *rr = NMP_OBJECT_CAST_ROUTING_RULE(o); if (addr_family != AF_UNSPEC && rr->addr_family != addr_family) continue; nmp_rules_manager_track(self, rr, tracking_priority, user_tag, NULL); } } /*****************************************************************************/ void nmp_rules_manager_track_default(NMPRulesManager *self, int addr_family, gint32 track_priority, gconstpointer user_tag) { g_return_if_fail(NMP_IS_RULES_MANAGER(self)); nm_assert(NM_IN_SET(addr_family, AF_UNSPEC, AF_INET, AF_INET6)); /* track the default rules. See also `man ip-rule`. */ if (NM_IN_SET(addr_family, AF_UNSPEC, AF_INET)) { nmp_rules_manager_track(self, &((NMPlatformRoutingRule){ .addr_family = AF_INET, .priority = 0, .table = RT_TABLE_LOCAL, .action = FR_ACT_TO_TBL, .protocol = RTPROT_KERNEL, }), track_priority, user_tag, NULL); nmp_rules_manager_track(self, &((NMPlatformRoutingRule){ .addr_family = AF_INET, .priority = 32766, .table = RT_TABLE_MAIN, .action = FR_ACT_TO_TBL, .protocol = RTPROT_KERNEL, }), track_priority, user_tag, NULL); nmp_rules_manager_track(self, &((NMPlatformRoutingRule){ .addr_family = AF_INET, .priority = 32767, .table = RT_TABLE_DEFAULT, .action = FR_ACT_TO_TBL, .protocol = RTPROT_KERNEL, }), track_priority, user_tag, NULL); } if (NM_IN_SET(addr_family, AF_UNSPEC, AF_INET6)) { nmp_rules_manager_track(self, &((NMPlatformRoutingRule){ .addr_family = AF_INET6, .priority = 0, .table = RT_TABLE_LOCAL, .action = FR_ACT_TO_TBL, .protocol = RTPROT_KERNEL, }), track_priority, user_tag, NULL); nmp_rules_manager_track(self, &((NMPlatformRoutingRule){ .addr_family = AF_INET6, .priority = 32766, .table = RT_TABLE_MAIN, .action = FR_ACT_TO_TBL, .protocol = RTPROT_KERNEL, }), track_priority, user_tag, NULL); } } static void _rules_init(NMPRulesManager *self) { if (self->by_data) return; self->by_data = g_hash_table_new_full(_rules_data_hash, _rules_data_equal, NULL, _rules_data_destroy); self->by_obj = g_hash_table_new_full(_rules_obj_hash, _rules_obj_equal, NULL, _rules_obj_destroy); self->by_user_tag = g_hash_table_new_full(_rules_user_tag_hash, _rules_user_tag_equal, NULL, _rules_user_tag_destroy); } /*****************************************************************************/ NMPRulesManager * nmp_rules_manager_new(NMPlatform *platform) { NMPRulesManager *self; g_return_val_if_fail(NM_IS_PLATFORM(platform), NULL); self = g_slice_new(NMPRulesManager); *self = (NMPRulesManager){ .ref_count = 1, .platform = g_object_ref(platform), }; return self; } void nmp_rules_manager_ref(NMPRulesManager *self) { g_return_if_fail(NMP_IS_RULES_MANAGER(self)); self->ref_count++; } void nmp_rules_manager_unref(NMPRulesManager *self) { g_return_if_fail(NMP_IS_RULES_MANAGER(self)); if (--self->ref_count > 0) return; if (self->by_data) { g_hash_table_destroy(self->by_user_tag); g_hash_table_destroy(self->by_obj); g_hash_table_destroy(self->by_data); } g_object_unref(self->platform); g_slice_free(NMPRulesManager, self); }