1 /* $NetBSD: dev-cache.h,v 1.1.1.1 2008/12/22 00:17:55 haad Exp $ */ 2 3 /* 4 * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved. 5 * Copyright (C) 2004-2007 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 #ifndef _LVM_DEV_CACHE_H 19 #define _LVM_DEV_CACHE_H 20 21 #include "device.h" 22 23 /* 24 * predicate for devices. 25 */ 26 struct dev_filter { 27 int (*passes_filter) (struct dev_filter * f, struct device * dev); 28 void (*destroy) (struct dev_filter * f); 29 void *private; 30 }; 31 32 /* 33 * The global device cache. 34 */ 35 struct cmd_context; 36 int dev_cache_init(struct cmd_context *cmd); 37 void dev_cache_exit(void); 38 39 /* Trigger(1) or avoid(0) a scan */ 40 void dev_cache_scan(int do_scan); 41 int dev_cache_has_scanned(void); 42 43 int dev_cache_add_dir(const char *path); 44 int dev_cache_add_loopfile(const char *path); 45 struct device *dev_cache_get(const char *name, struct dev_filter *f); 46 47 void dev_set_preferred_name(struct str_list *sl, struct device *dev); 48 49 /* 50 * Object for iterating through the cache. 51 */ 52 struct dev_iter; 53 struct dev_iter *dev_iter_create(struct dev_filter *f, int dev_scan); 54 void dev_iter_destroy(struct dev_iter *iter); 55 struct device *dev_iter_get(struct dev_iter *iter); 56 57 #endif 58