1/*	$NetBSD: filter-composite.c,v 1.1.1.1 2008/12/22 00:17:58 haad Exp $	*/
2
3/*
4 * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
5 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
6 *
7 * This file is part of LVM2.
8 *
9 * This copyrighted material is made available to anyone wishing to use,
10 * modify, copy, or redistribute it subject to the terms and conditions
11 * of the GNU Lesser General Public License v.2.1.
12 *
13 * You should have received a copy of the GNU Lesser General Public License
14 * along with this program; if not, write to the Free Software Foundation,
15 * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
16 */
17
18#include "lib.h"
19#include "filter-composite.h"
20
21#include <stdarg.h>
22
23static int _and_p(struct dev_filter *f, struct device *dev)
24{
25	struct dev_filter **filters = (struct dev_filter **) f->private;
26
27	while (*filters) {
28		if (!(*filters)->passes_filter(*filters, dev))
29			return 0;
30		filters++;
31	}
32
33	log_debug("Using %s", dev_name(dev));
34
35	return 1;
36}
37
38static void _composite_destroy(struct dev_filter *f)
39{
40	struct dev_filter **filters = (struct dev_filter **) f->private;
41
42	while (*filters) {
43		(*filters)->destroy(*filters);
44		filters++;
45	}
46
47	dm_free(f->private);
48	dm_free(f);
49}
50
51struct dev_filter *composite_filter_create(int n, struct dev_filter **filters)
52{
53	struct dev_filter **filters_copy, *cft;
54
55	if (!filters)
56		return_NULL;
57
58	if (!(filters_copy = dm_malloc(sizeof(*filters) * (n + 1)))) {
59		log_error("composite filters allocation failed");
60		return NULL;
61	}
62
63	memcpy(filters_copy, filters, sizeof(*filters) * n);
64	filters_copy[n] = NULL;
65
66	if (!(cft = dm_malloc(sizeof(*cft)))) {
67		log_error("compsoite filters allocation failed");
68		dm_free(filters_copy);
69		return NULL;
70	}
71
72	cft->passes_filter = _and_p;
73	cft->destroy = _composite_destroy;
74	cft->private = filters_copy;
75
76	return cft;
77}
78