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lvm2/tools/vgrename.c

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/*
* 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"
char *lv_change_vgname(char *vg_name, char *lv_name);
int vgrename(int argc, char **argv)
{
int l = 0;
int length = 0;
int p = 0;
int ret = 0;
char *lv_name_ptr;
char *vg_name_old;
char *vg_name_new;
char vg_name_old_buf[NAME_LEN] = { 0, };
char vg_name_new_buf[NAME_LEN] = { 0, };
char *prefix;
struct io_space *ios;
struct volume_group *vg_old, *vg_new;
if (argc != 2) {
log_error("command line too short");
return EINVALID_CMD_LINE;
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}
ios = active_ios();
prefix = lvm_dir_prefix();
length = strlen(prefix);
vg_name_old = argv[0];
if (strlen(vg_name_new = argv[1]) > NAME_LEN - length - 2) {
log_error("New logical volume path exceeds maximum length "
"of %d!", NAME_LEN - length - 2);
return ECMD_FAILED;
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}
if (vg_check_name(vg_name_new) < 0) {
return EINVALID_CMD_LINE;
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}
/* FIXME Handle prefix-related logic internally within ios functions? */
if (strncmp(vg_name_old, prefix, length) != 0) {
sprintf(vg_name_old_buf, "%s%s", prefix, vg_name_old);
vg_name_old = vg_name_old_buf;
}
if (strncmp(vg_name_new, prefix, length) != 0) {
sprintf(vg_name_new_buf, "%s%s", prefix, vg_name_new);
vg_name_new = vg_name_new_buf;
}
if (strcmp(vg_name_old, vg_name_new) == 0) {
log_error("volume group names must be different");
return ECMD_FAILED;
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}
log_verbose("Checking existing volume group %s", vg_name_old);
if (!(vg_old = ios->vg_read(ios, vg_name_old))) {
log_error("volume group %s doesn't exist", vg_name_old);
return ECMD_FAILED;
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}
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if (vg_old->status & ACTIVE) {
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log_error("Volume group %s still active", vg_name_old);
}
log_verbose("Checking new volume group %s", vg_name_new);
if ((vg_new = ios->vg_read(ios, vg_name_new))) {
log_error("New volume group %s already exists", vg_name_new);
return ECMD_FAILED;
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}
/* change the volume name in all structures */
strcpy(vg_old->name, vg_name_new);
/* FIXME: Are these necessary? Or can vg_write fix these implicitly? */
for (p = 0; p < vg_old->pv_count; p++)
if (vg_old->pv[p])
strcpy(vg_old->pv[p]->vg_name, vg_name_new);
for (l = 0; l < vg_old->lv_count; l++) {
if (vg_old->lv[l] &&
!(lv_name_ptr =
lv_change_vgname(vg_name_new, vg_old->lv[l]->name))) {
log_error("A new logical volume path exceeds "
"maximum of %d!", NAME_LEN - 2);
return ECMD_FAILED;
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}
strcpy(vg_old->lv[l]->name, lv_name_ptr);
}
if (vg_remove_dir_and_group_and_nodes(vg_name_old) < 0) {
log_error("removing volume group nodes and directory of \"%s\"",
vg_name_old);
return ECMD_FAILED;
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}
/* store it on disks */
log_verbose("updating volume group name");
if (ios->vg_write(ios, vg_old)) {
return ECMD_FAILED;
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}
log_verbose("creating volume group directory %s%s", prefix,
vg_name_new);
if (vg_create_dir_and_group_and_nodes(vg_old)) {
return ECMD_FAILED;
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}
if ((ret = do_autobackup(vg_name_new, vg_old)))
return ECMD_FAILED;
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log_print("Volume group %s successfully renamed to %s",
vg_name_old, vg_name_new);
return 0;
/* FIXME: Deallocations */
}
/* FIXME: Move this out */
char *lv_change_vgname(char *vg_name, char *lv_name)
{
char *lv_name_ptr = NULL;
static char lv_name_buf[NAME_LEN] = { 0, };
/* check if lv_name includes a path */
if ((lv_name_ptr = strrchr(lv_name, '/'))) {
lv_name_ptr++;
sprintf(lv_name_buf, "%s%s/%s%c", lvm_dir_prefix(), vg_name,
lv_name_ptr, 0);
} else
strncpy(lv_name_buf, lv_name, NAME_LEN - 1);
return lv_name_buf;
}