zfs/lib/libzcommon/zfs_comutil.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #pragma ident   "%Z%%M% %I%     %E% SMI"
  27
  28 /*
  29  * This file is intended for functions that ought to be common between user
  30  * land (libzfs) and the kernel. When many common routines need to be shared
  31  * then a separate file should to be created.
  32  */
  33
  34 #if defined(_KERNEL)
  35 #include <sys/systm.h>
  36 #endif
  37
  38 #include <sys/types.h>
  39 #include <sys/fs/zfs.h>
  40 #include <sys/nvpair.h>
  41
  42 /*
  43  * Are there allocatable vdevs?
  44  */
  45 boolean_t
  46 zfs_allocatable_devs(nvlist_t *nv)
  47 {
  48         uint64_t is_log;
  49         uint_t c;
  50         nvlist_t **child;
  51         uint_t children;
  52
  53         if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
  54             &child, &children) != 0) {
  55                 return (B_FALSE);
  56         }
  57         for (c = 0; c < children; c++) {
  58                 is_log = 0;
  59                 (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_LOG,
  60                     &is_log);
  61                 if (!is_log)
  62                         return (B_TRUE);
  63         }
  64         return (B_FALSE);
  65 }