mirror of
git://sourceware.org/git/lvm2.git
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140 lines
3.0 KiB
C
140 lines
3.0 KiB
C
/*
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* Copyright (C) 2002 Sistina Software
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*
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* This file is released under the GPL.
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*
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*/
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/*
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* Changelog
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*
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* 05/02/2002 - First drop [HM]
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*/
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#include "tools.h"
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int disks_found = 0;
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int parts_found = 0;
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int pv_disks_found = 0;
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int pv_parts_found = 0;
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int max_len;
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static int _get_max_dev_name_len(struct dev_filter *filter)
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{
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int len = 0;
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int maxlen = 0;
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struct dev_iter *iter;
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struct device *dev;
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if (!(iter = dev_iter_create(filter))) {
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log_error("dev_iter_create failed");
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return 0;
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}
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/* Do scan */
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for (dev = dev_iter_get(iter); dev; dev = dev_iter_get(iter)) {
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len = strlen(dev_name(dev));
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if (len > maxlen)
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maxlen = len;
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}
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dev_iter_destroy(iter);
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return maxlen;
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}
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static void _count(struct device *dev, int *disks, int *parts)
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{
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int c = dev_name(dev)[strlen(dev_name(dev)) - 1];
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if (!isdigit(c))
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(*disks)++;
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else
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(*parts)++;
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}
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static void _print(struct cmd_context *cmd, const struct device *dev,
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uint64_t size, const char *what)
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{
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log_print("%-*s [%15s] %s", max_len, dev_name(dev),
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display_size(cmd, size / 2, SIZE_SHORT), what ? : "");
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}
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static int _check_device(struct cmd_context *cmd, struct device *dev)
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{
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char buffer;
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uint64_t size;
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if (!dev_open(dev)) {
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return 0;
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}
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if (!dev_read(dev, UINT64_C(0), (size_t) 1, &buffer)) {
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dev_close(dev);
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return 0;
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}
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if (!dev_get_size(dev, &size)) {
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log_error("Couldn't get size of \"%s\"", dev_name(dev));
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}
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_print(cmd, dev, size, NULL);
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_count(dev, &disks_found, &parts_found);
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if (!dev_close(dev)) {
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log_error("dev_close on \"%s\" failed", dev_name(dev));
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return 0;
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}
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return 1;
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}
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int lvmdiskscan(struct cmd_context *cmd, int argc, char **argv)
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{
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uint64_t size;
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struct dev_iter *iter;
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struct device *dev;
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struct label *label;
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if (arg_count(cmd, lvmpartition_ARG))
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log_print("WARNING: only considering LVM devices");
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max_len = _get_max_dev_name_len(cmd->filter);
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if (!(iter = dev_iter_create(cmd->filter))) {
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log_error("dev_iter_create failed");
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return 0;
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}
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/* Do scan */
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for (dev = dev_iter_get(iter); dev; dev = dev_iter_get(iter)) {
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/* Try if it is a PV first */
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if ((label_read(dev, &label))) {
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if (!dev_get_size(dev, &size)) {
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log_error("Couldn't get size of \"%s\"",
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dev_name(dev));
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continue;
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}
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_print(cmd, dev, size, "LVM physical volume");
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_count(dev, &pv_disks_found, &pv_parts_found);
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continue;
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}
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/* If user just wants PVs we are done */
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if (arg_count(cmd, lvmpartition_ARG))
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continue;
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/* What other device is it? */
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if (!_check_device(cmd, dev))
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continue;
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}
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dev_iter_destroy(iter);
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/* Display totals */
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if (!arg_count(cmd, lvmpartition_ARG)) {
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log_print("%d disk%s",
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disks_found, disks_found == 1 ? "" : "s");
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log_print("%d partition%s",
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parts_found, parts_found == 1 ? "" : "s");
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}
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log_print("%d LVM physical volume whole disk%s",
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pv_disks_found, pv_disks_found == 1 ? "" : "s");
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log_print("%d LVM physical volume%s",
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pv_parts_found, pv_parts_found == 1 ? "" : "s");
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return 0;
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}
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