tools/lvscan.c

   1 /*
   2  * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
   3  * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
   4  *
   5  * This file is part of LVM2.
   6  *
   7  * This copyrighted material is made available to anyone wishing to use,
   8  * modify, copy, or redistribute it subject to the terms and conditions
   9  * of the GNU Lesser General Public License v.2.1.
  10  *
  11  * You should have received a copy of the GNU Lesser General Public License
  12  * along with this program; if not, write to the Free Software Foundation,
  13  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  14  */
  15
  16 #include "tools.h"
  17
  18 static int lvscan_single(struct cmd_context *cmd, struct logical_volume *lv,
  19                          void *handle __attribute__((unused)))
  20 {
  21         struct lvinfo info;
  22         int lv_total = 0;
  23         uint64_t lv_capacity_total = 0;
  24         int inkernel, snap_active = 1;
  25         struct lv_segment *snap_seg = NULL;
  26         percent_t snap_percent;     /* fused, fsize; */
  27
  28         const char *active_str, *snapshot_str;
  29
  30         if (!arg_count(cmd, all_ARG) && !lv_is_visible(lv))
  31                 return ECMD_PROCESSED;
  32
  33         inkernel = lv_info(cmd, lv, 0, &info, 1, 0) && info.exists;
  34         if (lv_is_origin(lv)) {
  35                 dm_list_iterate_items_gen(snap_seg, &lv->snapshot_segs,
  36                                        origin_list) {
  37                         if (inkernel &&
  38                             (snap_active = lv_snapshot_percent(snap_seg->cow,
  39                                                                &snap_percent)))
  40                                 if (snap_percent == PERCENT_INVALID)
  41                                         snap_active = 0;
  42                 }
  43                 snap_seg = NULL;
  44         } else if (lv_is_cow(lv)) {
  45                 if (inkernel &&
  46                     (snap_active = lv_snapshot_percent(lv, &snap_percent)))
  47                         if (snap_percent == PERCENT_INVALID)
  48                                 snap_active = 0;
  49         }
  50
  51 /* FIXME Add -D arg to skip this! */
  52         if (inkernel && snap_active)
  53                 active_str = "ACTIVE   ";
  54         else
  55                 active_str = "inactive ";
  56
  57         if (lv_is_origin(lv))
  58                 snapshot_str = "Original";
  59         else if (lv_is_cow(lv))
  60                 snapshot_str = "Snapshot";
  61         else
  62                 snapshot_str = "        ";
  63
  64         log_print("%s%s '%s%s/%s' [%s] %s", active_str, snapshot_str,
  65                   cmd->dev_dir, lv->vg->name, lv->name,
  66                   display_size(cmd, lv->size),
  67                   get_alloc_string(lv->alloc));
  68
  69         lv_total++;
  70
  71         lv_capacity_total += lv->size;
  72
  73         return ECMD_PROCESSED;
  74 }
  75
  76 int lvscan(struct cmd_context *cmd, int argc, char **argv)
  77 {
  78         if (argc) {
  79                 log_error("No additional command line arguments allowed");
  80                 return EINVALID_CMD_LINE;
  81         }
  82
  83         return process_each_lv(cmd, argc, argv, 0, NULL,
  84                                &lvscan_single);
  85 }