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/*
* Copyright (C) 2022 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 "base/memory/zalloc.h"
#include "lib/misc/lib.h"
#include "lib/device/device.h"
#include <stdio.h>
#include <unistd.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <inttypes.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <ctype.h>
#include <limits.h>
#include <dirent.h>
#include <errno.h>
#include <stdbool.h>
#include <assert.h>
/*
* Replace series of spaces with a single _.
*/
int format_t10_id(const unsigned char *in, int in_bytes, unsigned char *out, int out_bytes)
{
int in_space = 0;
int retlen = 0;
int j = 0;
int i;
for (i = 0; i < in_bytes; i++) {
if (!in[i])
break;
if (j >= (out_bytes - 2))
break;
/* skip leading spaces */
if (!retlen && (in[i] == ' '))
continue;
/* replace one or more spaces with _ */
if (in[i] == ' ') {
in_space = 1;
continue;
}
/* spaces are finished so insert _ */
if (in_space) {
out[j++] = '_';
in_space = 0;
retlen++;
}
out[j++] = in[i];
retlen++;
}
return retlen;
}
static int _to_hex(const unsigned char *in, int in_bytes, unsigned char *out, int out_bytes)
{
int off = 0;
int num;
int i;
for (i = 0; i < in_bytes; i++) {
num = sprintf((char *)out + off, "%02x", in[i]);
if (num < 0)
break;
off += num;
if (off + 2 >= out_bytes)
break;
}
return off;
}
#define ID_BUFSIZE 1024
/*
* based on linux kernel function
*/
int parse_vpd_ids(const unsigned char *vpd_data, int vpd_datalen, struct dm_list *ids)
{
char id[ID_BUFSIZE];
unsigned char tmp_str[ID_BUFSIZE];
const unsigned char *d, *cur_id_str;
size_t id_len = ID_BUFSIZE;
int id_size = -1;
uint8_t cur_id_size = 0;
memset(id, 0, ID_BUFSIZE);
for (d = vpd_data + 4;
d < vpd_data + vpd_datalen;
d += d[3] + 4) {
memset(tmp_str, 0, sizeof(tmp_str));
switch (d[1] & 0xf) {
case 0x1:
/* T10 Vendor ID */
cur_id_size = d[3];
if (cur_id_size + 4 > id_len)
cur_id_size = id_len - 4;
cur_id_str = d + 4;
format_t10_id(cur_id_str, cur_id_size, tmp_str, sizeof(tmp_str));
id_size = snprintf(id, ID_BUFSIZE, "t10.%s", tmp_str);
if (id_size < 0)
break;
if (id_size >= ID_BUFSIZE)
id_size = ID_BUFSIZE - 1;
add_wwid(id, 1, ids);
break;
case 0x2:
/* EUI-64 */
cur_id_size = d[3];
cur_id_str = d + 4;
switch (cur_id_size) {
case 8:
_to_hex(cur_id_str, 8, tmp_str, sizeof(tmp_str));
id_size = snprintf(id, ID_BUFSIZE, "eui.%s", tmp_str);
break;
case 12:
_to_hex(cur_id_str, 12, tmp_str, sizeof(tmp_str));
id_size = snprintf(id, ID_BUFSIZE, "eui.%s", tmp_str);
break;
case 16:
_to_hex(cur_id_str, 16, tmp_str, sizeof(tmp_str));
id_size = snprintf(id, ID_BUFSIZE, "eui.%s", tmp_str);
break;
default:
break;
}
if (id_size < 0)
break;
if (id_size >= ID_BUFSIZE)
id_size = ID_BUFSIZE - 1;
add_wwid(id, 2, ids);
break;
case 0x3:
/* NAA */
cur_id_size = d[3];
cur_id_str = d + 4;
switch (cur_id_size) {
case 8:
_to_hex(cur_id_str, 8, tmp_str, sizeof(tmp_str));
id_size = snprintf(id, ID_BUFSIZE, "naa.%s", tmp_str);
break;
case 16:
_to_hex(cur_id_str, 16, tmp_str, sizeof(tmp_str));
id_size = snprintf(id, ID_BUFSIZE, "naa.%s", tmp_str);
break;
default:
break;
}
if (id_size < 0)
break;
if (id_size >= ID_BUFSIZE)
id_size = ID_BUFSIZE - 1;
add_wwid(id, 3, ids);
break;
case 0x8:
/* SCSI name string */
cur_id_size = d[3];
cur_id_str = d + 4;
if (cur_id_size >= id_len)
cur_id_size = id_len - 1;
memcpy(id, cur_id_str, cur_id_size);
id_size = cur_id_size;
/*
* Not in the kernel version, copying multipath code,
* which checks if this string begins with naa or eui
* and if so does tolower() on the chars.
*/
if (!strncmp(id, "naa.", 4) || !strncmp(id, "eui.", 4)) {
int i;
for (i = 0; i < id_size; i++)
id[i] = tolower(id[i]);
}
add_wwid(id, 8, ids);
break;
default:
break;
}
}
return id_size;
}
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