libdisk/lvm.c

   1 /*
   2  * Copyright (c) 2000 Silicon Graphics, Inc.  All Rights Reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of version 2 of the GNU General Public License as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it would be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  11  *
  12  * Further, this software is distributed without any warranty that it is
  13  * free of the rightful claim of any third person regarding infringement
  14  * or the like.  Any license provided herein, whether implied or
  15  * otherwise, applies only to this software file.  Patent licenses, if
  16  * any, provided herein do not apply to combinations of this program with
  17  * other software, or any other product whatsoever.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write the Free Software Foundation, Inc., 59
  21  * Temple Place - Suite 330, Boston MA 02111-1307, USA.
  22  *
  23  * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
  24  * Mountain View, CA  94043, or:
  25  *
  26  * http://www.sgi.com
  27  *
  28  * For further information regarding this notice, see:
  29  *
  30  * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
  31  */
  32
  33 #include <stdio.h>
  34 #include <errno.h>
  35 #include <sys/stat.h>
  36 #include <volume.h>
  37
  38 #include "lvm_user.h"
  39
  40 #if HAVE_LIBLVM
  41   char *cmd;            /* Not used. liblvm is broken */
  42   int opt_d;            /* Same thing */
  43 #endif
  44
  45 int
  46 mnt_is_lvm_subvol(dev_t dev)
  47 {
  48         if (dev >> 8 == LVM_BLK_MAJOR)
  49                 return 1;
  50         return 0;
  51 }
  52
  53 int
  54 lvm_get_subvol_stripe(
  55         char            *dfile,
  56         sv_type_t       type,
  57         int             *sunit,
  58         int             *swidth,
  59         struct stat64   *sb)
  60 {
  61 #if HAVE_LIBLVM
  62         if (mnt_is_lvm_subvol(sb->st_rdev)) {
  63                 lv_t    *lv;
  64                 char    *vgname;
  65
  66                 /* Find volume group */
  67                 if (! (vgname = vg_name_of_lv(dfile))) {
  68                         fprintf(stderr, "Can't find volume group for %s\n",
  69                                 dfile);
  70                         exit(1);
  71                 }
  72
  73                 /* Logical volume */
  74                 if (! lvm_tab_lv_check_exist(dfile)) {
  75                         fprintf(stderr, "Logical volume %s doesn't exist!\n",
  76                                 dfile);
  77                         exit(1);
  78                 }
  79
  80                 /* Get status */
  81                 if (lv_status_byname(vgname, dfile, &lv) < 0 || lv == NULL) {
  82                         fprintf(stderr, "Could not get status info from %s\n",
  83                                 dfile);
  84                         exit(1);
  85                 }
  86
  87                 /* Check that data is consistent */
  88                 if (lv_check_consistency(lv) < 0) {
  89                         fprintf(stderr, "Logical volume %s is inconsistent\n",
  90                                 dfile);
  91                         exit(1);
  92                 }
  93
  94                 /* Update sizes */
  95                 *sunit = lv->lv_stripesize;
  96                 *swidth = lv->lv_stripes * lv->lv_stripesize;
  97
  98                 return 1;
  99         }
 100 #endif /* HAVE_LIBLVM */
 101         return 0;
 102 }