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 23 static 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 38 static 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 51 struct 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