busybox/util-linux/volume_id/unused_lvm.c
Denis Vlasenko d25c33f186 volume_id: disable detection routines which are not setting label and uuid anyway
function                                             old     new   delta
static.warn                                            1       -      -1
static.drive_name_string                              14      12      -2
static.offsets                                         8       -      -8
static.sectors                                        10       -     -10
fs2                                                   60      48     -12
raid2                                                 16       -     -16
uuidcache_init                                       704     677     -27
raid1                                                 32       -     -32
volume_id_probe_all                                  198     158     -40
volume_id_probe_lvm1                                  58       -     -58
volume_id_probe_highpoint_37x_raid                    63       -     -63
volume_id_probe_hpfs                                  67       -     -67
volume_id_probe_minix                                 74       -     -74
volume_id_probe_lvm2                                  78       -     -78
volume_id_probe_silicon_medley_raid                   97       -     -97
volume_id_probe_via_raid                             101       -    -101
volume_id_probe_highpoint_45x_raid                   104       -    -104
volume_id_probe_nvidia_raid                          108       -    -108
volume_id_probe_lsi_mega_raid                        108       -    -108
volume_id_probe_intel_software_raid                  108       -    -108
volume_id_probe_ufs                                  126       -    -126
volume_id_probe_promise_fasttrack_raid               144       -    -144
------------------------------------------------------------------------------
(add/remove: 0/18 grow/shrink: 0/4 up/down: 0/-1384)        Total: -1384 bytes
   text    data     bss     dec     hex filename
 794244     662    7420  802326   c3e16 busybox_old
 792698     662    7420  800780   c380c busybox_unstripped
2008-03-17 09:25:05 +00:00

88 lines
2.2 KiB
C

/*
* volume_id - reads filesystem label and uuid
*
* Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "volume_id_internal.h"
struct lvm1_super_block {
uint8_t id[2];
} __attribute__((packed));
struct lvm2_super_block {
uint8_t id[8];
uint64_t sector_xl;
uint32_t crc_xl;
uint32_t offset_xl;
uint8_t type[8];
} __attribute__((packed));
#define LVM1_SB_OFF 0x400
int volume_id_probe_lvm1(struct volume_id *id, uint64_t off)
{
struct lvm1_super_block *lvm;
dbg("probing at offset 0x%llx", (unsigned long long) off);
lvm = volume_id_get_buffer(id, off + LVM1_SB_OFF, 0x800);
if (lvm == NULL)
return -1;
if (lvm->id[0] != 'H' || lvm->id[1] != 'M')
return -1;
// volume_id_set_usage(id, VOLUME_ID_RAID);
// id->type = "LVM1_member";
return 0;
}
#define LVM2_LABEL_ID "LABELONE"
#define LVM2LABEL_SCAN_SECTORS 4
int volume_id_probe_lvm2(struct volume_id *id, uint64_t off)
{
const uint8_t *buf;
unsigned soff;
struct lvm2_super_block *lvm;
dbg("probing at offset 0x%llx", (unsigned long long) off);
buf = volume_id_get_buffer(id, off, LVM2LABEL_SCAN_SECTORS * 0x200);
if (buf == NULL)
return -1;
for (soff = 0; soff < LVM2LABEL_SCAN_SECTORS * 0x200; soff += 0x200) {
lvm = (struct lvm2_super_block *) &buf[soff];
if (memcmp(lvm->id, LVM2_LABEL_ID, 8) == 0)
goto found;
}
return -1;
found:
// memcpy(id->type_version, lvm->type, 8);
// volume_id_set_usage(id, VOLUME_ID_RAID);
// id->type = "LVM2_member";
return 0;
}