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/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2018 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "tools.h"
#include "device_mapper/all.h"
#include "device_mapper/misc/dm-ioctl.h"
/*
* Check if there are any active volumes from restored vg_name.
* We can prompt user, as such operation may make some serious
* troubles later, when user will try to continue such devices.
*/
static int _check_all_dm_devices(const char *vg_name, unsigned *found)
{
struct dm_task *dmt;
struct dm_names *names;
char vgname_buf[DM_NAME_LEN * 2];
char *vgname, *lvname, *lvlayer;
unsigned next = 0;
int r = 1;
if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
return_0;
if (!dm_task_run(dmt)) {
r = 0;
goto_out;
}
if (!(names = dm_task_get_names(dmt))) {
r = 0;
goto_out;
}
if (!names->dev) {
log_verbose("No devices found.");
goto out;
}
do {
/* TODO: Do we want to validate UUID LVM- prefix as well ? */
names = (struct dm_names *)((char *) names + next);
if (!dm_strncpy(vgname_buf, names->name, sizeof(vgname_buf))) {
r = 0;
goto_out;
}
vgname = vgname_buf;
if (!dm_split_lvm_name(NULL, NULL, &vgname, &lvname, &lvlayer)) {
r = 0;
goto_out;
}
if (strcmp(vgname, vg_name) == 0) {
log_print("Volume group %s has active volume: %s.", vgname, lvname);
(*found)++;
}
next = names->next;
} while (next);
out:
dm_task_destroy(dmt);
return r;
}
int vgcfgrestore(struct cmd_context *cmd, int argc, char **argv)
{
const char *vg_name = NULL;
unsigned found = 0;
int ret;
if (argc == 1) {
vg_name = skip_dev_dir(cmd, argv[0], NULL);
if (!validate_name(vg_name)) {
log_error("Volume group name \"%s\" is invalid.", vg_name);
return EINVALID_CMD_LINE;
}
} else if (!(arg_is_set(cmd, list_ARG) && arg_is_set(cmd, file_ARG))) {
log_error("Please specify a *single* volume group to restore.");
return EINVALID_CMD_LINE;
}
/*
* FIXME: overloading the -l arg for now to display a
* list of archive files for a particular vg
*/
if (arg_is_set(cmd, list_ARG)) {
if (!(arg_is_set(cmd,file_ARG) ?
archive_display_file(cmd,
arg_str_value(cmd, file_ARG, "")) :
archive_display(cmd, vg_name)))
return_ECMD_FAILED;
return ECMD_PROCESSED;
}
if (!vg_name) {
log_error(INTERNAL_ERROR "VG name is not set.");
return ECMD_FAILED;
} else if (!_check_all_dm_devices(vg_name, &found)) {
log_warn("WARNING: Failed to check for active volumes in volume group \"%s\".", vg_name);
} else if (found) {
log_warn("WARNING: Found %u active volume(s) in volume group \"%s\".",
found, vg_name);
log_print("Restoring VG with active LVs, may cause mismatch with its metadata.");
if (!arg_is_set(cmd, yes_ARG) &&
yes_no_prompt("Do you really want to proceed with restore of volume group \"%s\", "
"while %u volume(s) are active? [y/n]: ",
vg_name, found) == 'n') {
log_error("Restore aborted.");
return ECMD_FAILED;
}
}
if (!lock_global(cmd, "ex"))
return ECMD_FAILED;
if (!lock_vol(cmd, vg_name, LCK_VG_WRITE, NULL)) {
log_error("Unable to lock volume group %s.", vg_name);
return ECMD_FAILED;
}
clear_hint_file(cmd);
if (!lvmcache_label_scan(cmd)) {
unlock_vg(cmd, NULL, vg_name);
return_ECMD_FAILED;
}
cmd->handles_unknown_segments = 1;
if (!(arg_is_set(cmd, file_ARG) ?
backup_restore_from_file(cmd, vg_name,
arg_str_value(cmd, file_ARG, ""),
arg_count(cmd, force_long_ARG)) :
backup_restore(cmd, vg_name, arg_count(cmd, force_long_ARG)))) {
unlock_vg(cmd, NULL, vg_name);
log_error("Restore failed.");
ret = ECMD_FAILED;
goto out;
}
ret = ECMD_PROCESSED;
log_print_unless_silent("Restored volume group %s.", vg_name);
unlock_vg(cmd, NULL, vg_name);
out:
return ret;
}
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