tools/pvscan.c

   1 /*
   2  * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
   3  * Copyright (C) 2004-2007 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 int pv_max_name_len = 0;
  19 int vg_max_name_len = 0;
  20
  21 static void _pvscan_display_single(struct cmd_context *cmd,
  22                                    struct physical_volume *pv,
  23                                    void *handle __attribute__((unused)))
  24 {
  25         char uuid[64] __attribute__((aligned(8)));
  26         unsigned vg_name_len = 0;
  27
  28         char pv_tmp_name[NAME_LEN] = { 0, };
  29         char vg_tmp_name[NAME_LEN] = { 0, };
  30         char vg_name_this[NAME_LEN] = { 0, };
  31
  32         /* short listing? */
  33         if (arg_count(cmd, short_ARG) > 0) {
  34                 log_print("%s", pv_dev_name(pv));
  35                 return;
  36         }
  37
  38         if (arg_count(cmd, verbose_ARG) > 1) {
  39                 /* FIXME As per pv_display! Drop through for now. */
  40                 /* pv_show(pv); */
  41
  42                 /* FIXME - Moved to Volume Group structure */
  43                 /* log_print("System Id             %s", pv->vg->system_id); */
  44
  45                 /* log_print(" "); */
  46                 /* return; */
  47         }
  48
  49         memset(pv_tmp_name, 0, sizeof(pv_tmp_name));
  50
  51         vg_name_len = strlen(pv_vg_name(pv)) + 1;
  52
  53         if (arg_count(cmd, uuid_ARG)) {
  54                 if (!id_write_format(&pv->id, uuid, sizeof(uuid))) {
  55                         stack;
  56                         return;
  57                 }
  58
  59                 sprintf(pv_tmp_name, "%-*s with UUID %s",
  60                         pv_max_name_len - 2, pv_dev_name(pv), uuid);
  61         } else {
  62                 sprintf(pv_tmp_name, "%s", pv_dev_name(pv));
  63         }
  64
  65         if (is_orphan(pv)) {
  66                 log_print("PV %-*s    %-*s %s [%s]",
  67                           pv_max_name_len, pv_tmp_name,
  68                           vg_max_name_len, " ",
  69                           pv->fmt ? pv->fmt->name : "    ",
  70                           display_size(cmd, pv_size(pv)));
  71                 return;
  72         }
  73
  74         if (pv_status(pv) & EXPORTED_VG) {
  75                 strncpy(vg_name_this, pv_vg_name(pv), vg_name_len);
  76                 log_print("PV %-*s  is in exported VG %s "
  77                           "[%s / %s free]",
  78                           pv_max_name_len, pv_tmp_name,
  79                           vg_name_this,
  80                           display_size(cmd, (uint64_t) pv_pe_count(pv) *
  81                                        pv_pe_size(pv)),
  82                           display_size(cmd, (uint64_t) (pv_pe_count(pv) -
  83                                                 pv_pe_alloc_count(pv))
  84                                        * pv_pe_size(pv)));
  85                 return;
  86         }
  87
  88         sprintf(vg_tmp_name, "%s", pv_vg_name(pv));
  89         log_print("PV %-*s VG %-*s %s [%s / %s free]", pv_max_name_len,
  90                   pv_tmp_name, vg_max_name_len, vg_tmp_name,
  91                   pv->fmt ? pv->fmt->name : "    ",
  92                   display_size(cmd, (uint64_t) pv_pe_count(pv) *
  93                                                pv_pe_size(pv)),
  94                   display_size(cmd, (uint64_t) (pv_pe_count(pv) -
  95                                                 pv_pe_alloc_count(pv)) *
  96                                            pv_pe_size(pv)));
  97 }
  98
  99 int pvscan(struct cmd_context *cmd, int argc __attribute__((unused)),
 100            char **argv __attribute__((unused)))
 101 {
 102         int new_pvs_found = 0;
 103         int pvs_found = 0;
 104
 105         struct dm_list *pvslist;
 106         struct pv_list *pvl;
 107         struct physical_volume *pv;
 108
 109         uint64_t size_total = 0;
 110         uint64_t size_new = 0;
 111
 112         int len = 0;
 113         pv_max_name_len = 0;
 114         vg_max_name_len = 0;
 115
 116         if (arg_count(cmd, novolumegroup_ARG) && arg_count(cmd, exported_ARG)) {
 117                 log_error("Options -e and -n are incompatible");
 118                 return EINVALID_CMD_LINE;
 119         }
 120
 121         if (arg_count(cmd, exported_ARG) || arg_count(cmd, novolumegroup_ARG))
 122                 log_warn("WARNING: only considering physical volumes %s",
 123                           arg_count(cmd, exported_ARG) ?
 124                           "of exported volume group(s)" : "in no volume group");
 125
 126         if (!lock_vol(cmd, VG_GLOBAL, LCK_VG_WRITE)) {
 127                 log_error("Unable to obtain global lock.");
 128                 return ECMD_FAILED;
 129         }
 130
 131         persistent_filter_wipe(cmd->filter);
 132         lvmcache_destroy(cmd, 1);
 133
 134         log_verbose("Walking through all physical volumes");
 135         if (!(pvslist = get_pvs(cmd))) {
 136                 unlock_vg(cmd, VG_GLOBAL);
 137                 stack;
 138                 return ECMD_FAILED;
 139         }
 140
 141         /* eliminate exported/new if required */
 142         dm_list_iterate_items(pvl, pvslist) {
 143                 pv = pvl->pv;
 144
 145                 if ((arg_count(cmd, exported_ARG)
 146                      && !(pv_status(pv) & EXPORTED_VG))
 147                     || (arg_count(cmd, novolumegroup_ARG) && (!is_orphan(pv)))) {
 148                         dm_list_del(&pvl->list);
 149                         continue;
 150                 }
 151
 152                 /* Also check for MD use? */
 153 /*******
 154                 if (MAJOR(pv_create_kdev_t(pv[p]->pv_name)) != MD_MAJOR) {
 155                         log_warn
 156                             ("WARNING: physical volume \"%s\" belongs to a meta device",
 157                              pv[p]->pv_name);
 158                 }
 159                 if (MAJOR(pv[p]->pv_dev) != MD_MAJOR)
 160                         continue;
 161 ********/
 162                 pvs_found++;
 163
 164                 if (is_orphan(pv)) {
 165                         new_pvs_found++;
 166                         size_new += pv_size(pv);
 167                         size_total += pv_size(pv);
 168                 } else
 169                         size_total += (uint64_t) pv_pe_count(pv) * pv_pe_size(pv);
 170         }
 171
 172         /* find maximum pv name length */
 173         pv_max_name_len = vg_max_name_len = 0;
 174         dm_list_iterate_items(pvl, pvslist) {
 175                 pv = pvl->pv;
 176                 len = strlen(pv_dev_name(pv));
 177                 if (pv_max_name_len < len)
 178                         pv_max_name_len = len;
 179                 len = strlen(pv_vg_name(pv));
 180                 if (vg_max_name_len < len)
 181                         vg_max_name_len = len;
 182         }
 183         pv_max_name_len += 2;
 184         vg_max_name_len += 2;
 185
 186         dm_list_iterate_items(pvl, pvslist)
 187             _pvscan_display_single(cmd, pvl->pv, NULL);
 188
 189         if (!pvs_found) {
 190                 log_print("No matching physical volumes found");
 191                 unlock_vg(cmd, VG_GLOBAL);
 192                 return ECMD_PROCESSED;
 193         }
 194
 195         log_print("Total: %d [%s] / in use: %d [%s] / in no VG: %d [%s]",
 196                   pvs_found,
 197                   display_size(cmd, size_total),
 198                   pvs_found - new_pvs_found,
 199                   display_size(cmd, (size_total - size_new)),
 200                   new_pvs_found, display_size(cmd, size_new));
 201
 202         unlock_vg(cmd, VG_GLOBAL);
 203
 204         return ECMD_PROCESSED;
 205 }