/*      $NetBSD: pvscan.c,v 1.1.1.2 2009/12/02 00:25:54 haad Exp $      */

/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License v.2.1.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include "tools.h"

int pv_max_name_len = 0;
int vg_max_name_len = 0;

static void _pvscan_display_single(struct cmd_context *cmd,
                                  struct physical_volume *pv,
                                  void *handle __attribute((unused)))
{
       char uuid[64] __attribute((aligned(8)));
       unsigned vg_name_len = 0;

       char pv_tmp_name[NAME_LEN] = { 0, };
       char vg_tmp_name[NAME_LEN] = { 0, };
       char vg_name_this[NAME_LEN] = { 0, };

       /* short listing? */
       if (arg_count(cmd, short_ARG) > 0) {
               log_print("%s", pv_dev_name(pv));
               return;
       }

       if (arg_count(cmd, verbose_ARG) > 1) {
               /* FIXME As per pv_display! Drop through for now. */
               /* pv_show(pv); */

               /* FIXME - Moved to Volume Group structure */
               /* log_print("System Id             %s", pv->vg->system_id); */

               /* log_print(" "); */
               /* return; */
       }

       memset(pv_tmp_name, 0, sizeof(pv_tmp_name));

       vg_name_len = strlen(pv_vg_name(pv)) + 1;

       if (arg_count(cmd, uuid_ARG)) {
               if (!id_write_format(&pv->id, uuid, sizeof(uuid))) {
                       stack;
                       return;
               }

               sprintf(pv_tmp_name, "%-*s with UUID %s",
                       pv_max_name_len - 2, pv_dev_name(pv), uuid);
       } else {
               sprintf(pv_tmp_name, "%s", pv_dev_name(pv));
       }

       if (is_orphan(pv)) {
               log_print("PV %-*s    %-*s %s [%s]",
                         pv_max_name_len, pv_tmp_name,
                         vg_max_name_len, " ",
                         pv->fmt ? pv->fmt->name : "    ",
                         display_size(cmd, pv_size(pv)));
               return;
       }

       if (pv_status(pv) & EXPORTED_VG) {
               strncpy(vg_name_this, pv_vg_name(pv), vg_name_len);
               log_print("PV %-*s  is in exported VG %s "
                         "[%s / %s free]",
                         pv_max_name_len, pv_tmp_name,
                         vg_name_this,
                         display_size(cmd, (uint64_t) pv_pe_count(pv) *
                                      pv_pe_size(pv)),
                         display_size(cmd, (uint64_t) (pv_pe_count(pv) -
                                               pv_pe_alloc_count(pv))
                                      * pv_pe_size(pv)));
               return;
       }

       sprintf(vg_tmp_name, "%s", pv_vg_name(pv));
       log_print("PV %-*s VG %-*s %s [%s / %s free]", pv_max_name_len,
                 pv_tmp_name, vg_max_name_len, vg_tmp_name,
                 pv->fmt ? pv->fmt->name : "    ",
                 display_size(cmd, (uint64_t) pv_pe_count(pv) *
                                              pv_pe_size(pv)),
                 display_size(cmd, (uint64_t) (pv_pe_count(pv) -
                                               pv_pe_alloc_count(pv)) *
                                          pv_pe_size(pv)));
       return;
}

int pvscan(struct cmd_context *cmd, int argc __attribute((unused)),
          char **argv __attribute((unused)))
{
       int new_pvs_found = 0;
       int pvs_found = 0;

       struct dm_list *pvslist;
       struct pv_list *pvl;
       struct physical_volume *pv;

       uint64_t size_total = 0;
       uint64_t size_new = 0;

       int len = 0;
       pv_max_name_len = 0;
       vg_max_name_len = 0;

       if (arg_count(cmd, novolumegroup_ARG) && arg_count(cmd, exported_ARG)) {
               log_error("Options -e and -n are incompatible");
               return EINVALID_CMD_LINE;
       }

       if (arg_count(cmd, exported_ARG) || arg_count(cmd, novolumegroup_ARG))
               log_warn("WARNING: only considering physical volumes %s",
                         arg_count(cmd, exported_ARG) ?
                         "of exported volume group(s)" : "in no volume group");

       if (!lock_vol(cmd, VG_GLOBAL, LCK_VG_WRITE)) {
               log_error("Unable to obtain global lock.");
               return ECMD_FAILED;
       }

       persistent_filter_wipe(cmd->filter);
       lvmcache_destroy(cmd, 1);

       log_verbose("Walking through all physical volumes");
       if (!(pvslist = get_pvs(cmd))) {
               unlock_vg(cmd, VG_GLOBAL);
               stack;
               return ECMD_FAILED;
       }

       /* eliminate exported/new if required */
       dm_list_iterate_items(pvl, pvslist) {
               pv = pvl->pv;

               if ((arg_count(cmd, exported_ARG)
                    && !(pv_status(pv) & EXPORTED_VG))
                   || (arg_count(cmd, novolumegroup_ARG) && (!is_orphan(pv)))) {
                       dm_list_del(&pvl->list);
                       continue;
               }

               /* Also check for MD use? */
/*******
               if (MAJOR(pv_create_kdev_t(pv[p]->pv_name)) != MD_MAJOR) {
                       log_print
                           ("WARNING: physical volume \"%s\" belongs to a meta device",
                            pv[p]->pv_name);
               }
               if (MAJOR(pv[p]->pv_dev) != MD_MAJOR)
                       continue;
********/
               pvs_found++;

               if (is_orphan(pv)) {
                       new_pvs_found++;
                       size_new += pv_size(pv);
                       size_total += pv_size(pv);
               } else
                       size_total += pv_pe_count(pv) * pv_pe_size(pv);
       }

       /* find maximum pv name length */
       pv_max_name_len = vg_max_name_len = 0;
       dm_list_iterate_items(pvl, pvslist) {
               pv = pvl->pv;
               len = strlen(pv_dev_name(pv));
               if (pv_max_name_len < len)
                       pv_max_name_len = len;
               len = strlen(pv_vg_name(pv));
               if (vg_max_name_len < len)
                       vg_max_name_len = len;
       }
       pv_max_name_len += 2;
       vg_max_name_len += 2;

       dm_list_iterate_items(pvl, pvslist)
           _pvscan_display_single(cmd, pvl->pv, NULL);

       if (!pvs_found) {
               log_print("No matching physical volumes found");
               unlock_vg(cmd, VG_GLOBAL);
               return ECMD_PROCESSED;
       }

       log_print("Total: %d [%s] / in use: %d [%s] / in no VG: %d [%s]",
                 pvs_found,
                 display_size(cmd, size_total),
                 pvs_found - new_pvs_found,
                 display_size(cmd, (size_total - size_new)),
                 new_pvs_found, display_size(cmd, size_new));

       unlock_vg(cmd, VG_GLOBAL);

       return ECMD_PROCESSED;
}

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