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/*
* Copyright (C) 2002-2004 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
*/
/*
* Changelog
*
* 05/02/2002 - First drop [HM]
*/
#include "tools.h"
int disks_found;
int parts_found;
int pv_disks_found;
int pv_parts_found;
int max_len;
static int _get_max_dev_name_len(struct dev_filter *filter)
{
int len = 0;
int maxlen = 0;
struct dev_iter *iter;
struct device *dev;
if (!(iter = dev_iter_create(filter, 1))) {
log_error("dev_iter_create failed");
return 0;
}
/* Do scan */
for (dev = dev_iter_get(iter); dev; dev = dev_iter_get(iter)) {
len = strlen(dev_name(dev));
if (len > maxlen)
maxlen = len;
}
dev_iter_destroy(iter);
return maxlen;
}
static void _count(struct device *dev, int *disks, int *parts)
{
int c = dev_name(dev)[strlen(dev_name(dev)) - 1];
if (!isdigit(c))
(*disks)++;
else
(*parts)++;
}
static void _print(struct cmd_context *cmd, const struct device *dev,
uint64_t size, const char *what)
{
log_print("%-*s [%15s] %s", max_len, dev_name(dev),
display_size(cmd, size), what ? : "");
}
static int _check_device(struct cmd_context *cmd, struct device *dev)
{
char buffer;
uint64_t size;
if (!dev_open_readonly(dev))
return_0;
if (!dev_read(dev, UINT64_C(0), (size_t) 1, &buffer)) {
stack;
if (!dev_close(dev))
stack;
return 0;
}
if (!dev_get_size(dev, &size)) {
log_error("Couldn't get size of \"%s\"", dev_name(dev));
size = 0;
}
_print(cmd, dev, size, NULL);
_count(dev, &disks_found, &parts_found);
if (!dev_close(dev)) {
log_error("dev_close on \"%s\" failed", dev_name(dev));
return 0;
}
return 1;
}
int lvmdiskscan(struct cmd_context *cmd, int argc __attribute__((unused)),
char **argv __attribute__((unused)))
{
uint64_t size;
struct dev_iter *iter;
struct device *dev;
struct label *label;
/* initialise these here to avoid problems with the lvm shell */
disks_found = 0;
parts_found = 0;
pv_disks_found = 0;
pv_parts_found = 0;
if (arg_count(cmd, lvmpartition_ARG))
log_warn("WARNING: only considering LVM devices");
max_len = _get_max_dev_name_len(cmd->filter);
if (!(iter = dev_iter_create(cmd->filter, 0))) {
log_error("dev_iter_create failed");
return ECMD_FAILED;
}
/* Do scan */
for (dev = dev_iter_get(iter); dev; dev = dev_iter_get(iter)) {
/* Try if it is a PV first */
if ((label_read(dev, &label, UINT64_C(0)))) {
if (!dev_get_size(dev, &size)) {
log_error("Couldn't get size of \"%s\"",
dev_name(dev));
continue;
}
_print(cmd, dev, size, "LVM physical volume");
_count(dev, &pv_disks_found, &pv_parts_found);
continue;
}
/* If user just wants PVs we are done */
if (arg_count(cmd, lvmpartition_ARG))
continue;
/* What other device is it? */
if (!_check_device(cmd, dev))
continue;
}
dev_iter_destroy(iter);
/* Display totals */
if (!arg_count(cmd, lvmpartition_ARG)) {
log_print("%d disk%s",
disks_found, disks_found == 1 ? "" : "s");
log_print("%d partition%s",
parts_found, parts_found == 1 ? "" : "s");
}
log_print("%d LVM physical volume whole disk%s",
pv_disks_found, pv_disks_found == 1 ? "" : "s");
log_print("%d LVM physical volume%s",
pv_parts_found, pv_parts_found == 1 ? "" : "s");
return ECMD_PROCESSED;
}
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