lvm2/tools/pvscan.c

/*
 * Copyright (C) 2001 Sistina Software
 *
 * LVM is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * LVM is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with LVM; see the file COPYING.  If not, write to
 * the Free Software Foundation, 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 */

#include "tools.h"

void pvscan_display_single(struct physical_volume *pv);

int pv_max_name_len = 0;
int vg_max_name_len = 0;

int pvscan(int argc, char **argv)
{
	int new_pvs_found = 0;
	int pvs_found = 0;
	char *s1, *s2, *s3;

	struct list *pvs;
	struct list *pvh;
	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(novolumegroup_ARG) && arg_count(exported_ARG)) {
		log_error("Options -e and -n are incompatible");
		return EINVALID_CMD_LINE;
	}

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

	log_verbose("Wiping cache of LVM-capable devices");
	persistent_filter_wipe(fid->cmd->filter);

	log_verbose("Walking through all physical volumes");
	if (!(pvs = fid->ops->get_pvs(fid)))
		return ECMD_FAILED;

	/* eliminate exported/new if required */
	list_iterate(pvh, pvs) {
		pvl = list_item(pvh, struct pv_list);
		pv = &pvl->pv;

		if ((arg_count(exported_ARG) && !(pv->status & EXPORTED_VG))
		    || (arg_count(novolumegroup_ARG) && (*pv->vg_name))) {
			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 (!*pv->vg_name) {
			new_pvs_found++;
			size_new += pv->size;
			size_total += pv->size;
		} else
			size_total += (pv->pe_count - pv->pe_allocated)
				      * pv->pe_size;
	}

	/* find maximum pv name length */
	pv_max_name_len = vg_max_name_len = 0;
	list_iterate(pvh, pvs) {
		pv = &list_item(pvh, struct pv_list)->pv;
		len = strlen(dev_name(pv->dev));
		if (pv_max_name_len < len)
			pv_max_name_len = len;
		len = strlen(pv->vg_name);
		if (vg_max_name_len < len)
			vg_max_name_len = len;
	}
	pv_max_name_len += 2;
	vg_max_name_len += 2;

	list_iterate(pvh, pvs)
		pvscan_display_single(&list_item(pvh, struct pv_list)->pv);

	if (!pvs_found) {
		log_print("No matching physical volumes found");
		return 0;
	}

	log_print("Total: %d [%s] / in use: %d [%s] / in no VG: %d [%s]",
		  pvs_found,
		  (s1 = display_size(size_total / 2, SIZE_SHORT)),
		  pvs_found - new_pvs_found,
		  (s2 =
		   display_size((size_total - size_new) / 2, SIZE_SHORT)),
		  new_pvs_found, (s3 = display_size(size_new / 2, SIZE_SHORT)));
	dbg_free(s1);
	dbg_free(s2);
	dbg_free(s3);

	return 0;
}

void pvscan_display_single(struct physical_volume *pv)
{
	char uuid[64];
	int vg_name_len = 0;

	char *s1, *s2;

	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(short_ARG) > 0) {
		log_print("%s", dev_name(pv->dev));
		return;
	}

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

		log_print("System Id             %s", pv->exported);

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

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

	vg_name_len = strlen(pv->vg_name) - sizeof (EXPORTED_TAG) + 1;

	if (arg_count(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, dev_name(pv->dev), uuid);
	} else {
		sprintf(pv_tmp_name, "%s", dev_name(pv->dev));
	}

	if (!*pv->vg_name) {
		log_print("PV %-*s is in no VG %-*s [%s]", 
			  pv_max_name_len, pv_tmp_name,
			  vg_max_name_len - 6, " ",
			  (s1 = display_size(pv->size / 2, SIZE_SHORT)));
		dbg_free(s1);
		return;
	}

	if (strcmp(&pv->vg_name[vg_name_len], EXPORTED_TAG) == 0) {
		strncpy(vg_name_this, pv->vg_name, 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, (s1 =
					 display_size(pv->pe_count *
						      pv->pe_size / 2,
						      SIZE_SHORT)),
			  (s2 = display_size((pv->pe_count - pv->pe_allocated)
					     * pv->pe_size / 2, SIZE_SHORT)));
		dbg_free(s1);
		dbg_free(s2);
		return;
	}

	sprintf(vg_tmp_name, "%s", pv->vg_name);
	log_print
	    ("PV %-*s of VG %-*s [%s / %s free]", pv_max_name_len,
	     pv_tmp_name, vg_max_name_len, vg_tmp_name,
	     (s1 = display_size(pv->pe_count * pv->pe_size / 2, SIZE_SHORT)),
	     (s2 =
	      display_size((pv->pe_count - pv->pe_allocated) * pv->pe_size / 2,
			   SIZE_SHORT)));
	dbg_free(s1);
	dbg_free(s2);

	return;
}