98 static int build_changeset_next_level(struct overlay_changeset *ovcs,
155 static int overlay_notify(struct overlay_changeset *ovcs,  in overlay_notify()  argument
161 	ovcs->notify_state = action;  in overlay_notify()
163 	for (i = 0; i < ovcs->count; i++) {  in overlay_notify()
164 		struct fragment *fragment = &ovcs->fragments[i];  in overlay_notify()
196 		struct overlay_changeset *ovcs, const struct property *prop)  in dup_and_fixup_symbol_prop()  argument
220 	fragment_node = __of_find_node_by_path(ovcs->overlay_root, path + 1);  in dup_and_fixup_symbol_prop()
225 	for (k = 0; k < ovcs->count; k++) {  in dup_and_fixup_symbol_prop()
226 		fragment = &ovcs->fragments[k];  in dup_and_fixup_symbol_prop()
230 	if (k >= ovcs->count)  in dup_and_fixup_symbol_prop()
300 static int add_changeset_property(struct overlay_changeset *ovcs,  in add_changeset_property()  argument
340 		new_prop = dup_and_fixup_symbol_prop(ovcs, overlay_prop);  in add_changeset_property()
353 		ret = of_changeset_add_property(&ovcs->cset, target->np,  in add_changeset_property()
356 		ret = of_changeset_update_property(&ovcs->cset, target->np,  in add_changeset_property()
405 static int add_changeset_node(struct overlay_changeset *ovcs,  in add_changeset_node()  argument
438 		ret = of_changeset_attach_node(&ovcs->cset, tchild);  in add_changeset_node()
445 		ret = build_changeset_next_level(ovcs, &target_child, node);  in add_changeset_node()
455 		ret = build_changeset_next_level(ovcs, &target_child, node);  in add_changeset_node()
477 static int build_changeset_next_level(struct overlay_changeset *ovcs,  in build_changeset_next_level()  argument
485 		ret = add_changeset_property(ovcs, target, prop, 0);  in build_changeset_next_level()
494 		ret = add_changeset_node(ovcs, target, child);  in build_changeset_next_level()
509 static int build_changeset_symbols_node(struct overlay_changeset *ovcs,  in build_changeset_symbols_node()  argument
517 		ret = add_changeset_property(ovcs, target, prop, 1);  in build_changeset_symbols_node()
528 static int find_dup_cset_node_entry(struct overlay_changeset *ovcs,  in find_dup_cset_node_entry()  argument
540 	list_for_each_entry_continue(ce_2, &ovcs->cset.entries, node) {  in find_dup_cset_node_entry()
561 static int find_dup_cset_prop(struct overlay_changeset *ovcs,  in find_dup_cset_prop()  argument
574 	list_for_each_entry_continue(ce_2, &ovcs->cset.entries, node) {  in find_dup_cset_prop()
607 static int changeset_dup_entry_check(struct overlay_changeset *ovcs)  in changeset_dup_entry_check()  argument
612 	list_for_each_entry(ce_1, &ovcs->cset.entries, node) {  in changeset_dup_entry_check()
613 		dup_entry |= find_dup_cset_node_entry(ovcs, ce_1);  in changeset_dup_entry_check()
614 		dup_entry |= find_dup_cset_prop(ovcs, ce_1);  in changeset_dup_entry_check()
632 static int build_changeset(struct overlay_changeset *ovcs)  in build_changeset()  argument
642 	if (ovcs->symbols_fragment)  in build_changeset()
643 		fragments_count = ovcs->count - 1;  in build_changeset()
645 		fragments_count = ovcs->count;  in build_changeset()
648 		fragment = &ovcs->fragments[i];  in build_changeset()
652 		ret = build_changeset_next_level(ovcs, &target,  in build_changeset()
661 	if (ovcs->symbols_fragment) {  in build_changeset()
662 		fragment = &ovcs->fragments[ovcs->count - 1];  in build_changeset()
666 		ret = build_changeset_symbols_node(ovcs, &target,  in build_changeset()
675 	return changeset_dup_entry_check(ovcs);  in build_changeset()
728 static int init_overlay_changeset(struct overlay_changeset *ovcs)  in init_overlay_changeset()  argument
746 	if (!of_node_check_flag(ovcs->overlay_root, OF_DYNAMIC))  in init_overlay_changeset()
749 	if (!of_node_check_flag(ovcs->overlay_root, OF_DETACHED))  in init_overlay_changeset()
752 	if (!of_node_is_root(ovcs->overlay_root))  in init_overlay_changeset()
755 	of_changeset_init(&ovcs->cset);  in init_overlay_changeset()
760 	for_each_child_of_node(ovcs->overlay_root, node) {  in init_overlay_changeset()
768 	node = of_get_child_by_name(ovcs->overlay_root, "__symbols__");  in init_overlay_changeset()
779 	ovcs->fragments = fragments;  in init_overlay_changeset()
782 	for_each_child_of_node(ovcs->overlay_root, node) {  in init_overlay_changeset()
804 	node = of_get_child_by_name(ovcs->overlay_root, "__symbols__");  in init_overlay_changeset()
806 		ovcs->symbols_fragment = 1;  in init_overlay_changeset()
826 	ovcs->count = cnt;  in init_overlay_changeset()
836 static void free_overlay_changeset(struct overlay_changeset *ovcs)  in free_overlay_changeset()  argument
840 	if (ovcs->cset.entries.next)  in free_overlay_changeset()
841 		of_changeset_destroy(&ovcs->cset);  in free_overlay_changeset()
843 	if (ovcs->id) {  in free_overlay_changeset()
844 		idr_remove(&ovcs_idr, ovcs->id);  in free_overlay_changeset()
845 		list_del(&ovcs->ovcs_list);  in free_overlay_changeset()
846 		ovcs->id = 0;  in free_overlay_changeset()
850 	for (i = 0; i < ovcs->count; i++) {  in free_overlay_changeset()
851 		of_node_put(ovcs->fragments[i].target);  in free_overlay_changeset()
852 		of_node_put(ovcs->fragments[i].overlay);  in free_overlay_changeset()
854 	kfree(ovcs->fragments);  in free_overlay_changeset()
866 	if (ovcs->notify_state == OF_OVERLAY_INIT ||  in free_overlay_changeset()
867 	    ovcs->notify_state == OF_OVERLAY_POST_REMOVE) {  in free_overlay_changeset()
868 		kfree(ovcs->overlay_mem);  in free_overlay_changeset()
869 		kfree(ovcs->new_fdt);  in free_overlay_changeset()
871 	kfree(ovcs);  in free_overlay_changeset()
902 static int of_overlay_apply(struct overlay_changeset *ovcs)  in of_overlay_apply()  argument
906 	ret = of_resolve_phandles(ovcs->overlay_root);  in of_overlay_apply()
910 	ret = init_overlay_changeset(ovcs);  in of_overlay_apply()
914 	ret = overlay_notify(ovcs, OF_OVERLAY_PRE_APPLY);  in of_overlay_apply()
918 	ret = build_changeset(ovcs);  in of_overlay_apply()
923 	ret = __of_changeset_apply_entries(&ovcs->cset, &ret_revert);  in of_overlay_apply()
933 	ret = __of_changeset_apply_notify(&ovcs->cset);  in of_overlay_apply()
938 	ret_tmp = overlay_notify(ovcs, OF_OVERLAY_POST_APPLY);  in of_overlay_apply()
976 	struct overlay_changeset *ovcs;  in of_overlay_fdt_apply()  local
995 	ovcs = kzalloc(sizeof(*ovcs), GFP_KERNEL);  in of_overlay_fdt_apply()
996 	if (!ovcs)  in of_overlay_fdt_apply()
1007 	ovcs->id = idr_alloc(&ovcs_idr, ovcs, 1, 0, GFP_KERNEL);  in of_overlay_fdt_apply()
1008 	if (ovcs->id <= 0) {  in of_overlay_fdt_apply()
1009 		ret = ovcs->id;  in of_overlay_fdt_apply()
1013 	INIT_LIST_HEAD(&ovcs->ovcs_list);  in of_overlay_fdt_apply()
1014 	list_add_tail(&ovcs->ovcs_list, &ovcs_list);  in of_overlay_fdt_apply()
1025 	ovcs->new_fdt = new_fdt;  in of_overlay_fdt_apply()
1031 					    &ovcs->overlay_root);  in of_overlay_fdt_apply()
1037 	ovcs->overlay_mem = overlay_mem;  in of_overlay_fdt_apply()
1039 	ret = of_overlay_apply(ovcs);  in of_overlay_fdt_apply()
1050 	*ret_ovcs_id = ovcs->id;  in of_overlay_fdt_apply()
1055 	free_overlay_changeset(ovcs);  in of_overlay_fdt_apply()
1095 	struct overlay_changeset *ovcs;  in node_overlaps_later_cs()  local
1098 	list_for_each_entry_reverse(ovcs, &ovcs_list, ovcs_list) {  in node_overlaps_later_cs()
1099 		if (ovcs == remove_ovcs)  in node_overlaps_later_cs()
1102 		list_for_each_entry(ce, &ovcs->cset.entries, node) {  in node_overlaps_later_cs()
1105 					__func__, remove_ovcs->id, ovcs->id,  in node_overlaps_later_cs()
1111 					__func__, remove_ovcs->id, ovcs->id,  in node_overlaps_later_cs()
1181 	struct overlay_changeset *ovcs;  in of_overlay_remove()  local
1192 	ovcs = idr_find(&ovcs_idr, *ovcs_id);  in of_overlay_remove()
1193 	if (!ovcs) {  in of_overlay_remove()
1199 	if (!overlay_removal_is_ok(ovcs)) {  in of_overlay_remove()
1204 	ret = overlay_notify(ovcs, OF_OVERLAY_PRE_REMOVE);  in of_overlay_remove()
1209 	ret = __of_changeset_revert_entries(&ovcs->cset, &ret_apply);  in of_overlay_remove()
1216 	ret = __of_changeset_revert_notify(&ovcs->cset);  in of_overlay_remove()
1228 	ret_tmp = overlay_notify(ovcs, OF_OVERLAY_POST_REMOVE);  in of_overlay_remove()
1233 	free_overlay_changeset(ovcs);  in of_overlay_remove()
1259 	struct overlay_changeset *ovcs, *ovcs_n;  in of_overlay_remove_all()  local
1263 	list_for_each_entry_safe_reverse(ovcs, ovcs_n, &ovcs_list, ovcs_list) {  in of_overlay_remove_all()
1264 		ret = of_overlay_remove(&ovcs->id);  in of_overlay_remove_all()