3b45801dc6
Kbuild instructions for util-linux/volume_id are moved into the source files according to the new build feature. No code change. Signed-off-by: Sven-Göran Bergh <sgb@systemasis.org> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
84 lines
2.4 KiB
C
84 lines
2.4 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
|
|
*/
|
|
|
|
//kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_LINUXRAID) += linux_raid.o
|
|
|
|
#include "volume_id_internal.h"
|
|
|
|
struct mdp_super_block {
|
|
uint32_t md_magic;
|
|
uint32_t major_version;
|
|
uint32_t minor_version;
|
|
uint32_t patch_version;
|
|
uint32_t gvalid_words;
|
|
uint32_t set_uuid0;
|
|
uint32_t ctime;
|
|
uint32_t level;
|
|
uint32_t size;
|
|
uint32_t nr_disks;
|
|
uint32_t raid_disks;
|
|
uint32_t md_minor;
|
|
uint32_t not_persistent;
|
|
uint32_t set_uuid1;
|
|
uint32_t set_uuid2;
|
|
uint32_t set_uuid3;
|
|
} PACKED;
|
|
|
|
#define MD_RESERVED_BYTES 0x10000
|
|
#define MD_MAGIC 0xa92b4efc
|
|
|
|
int FAST_FUNC volume_id_probe_linux_raid(struct volume_id *id /*,uint64_t off*/, uint64_t size)
|
|
{
|
|
typedef uint32_t aliased_uint32_t FIX_ALIASING;
|
|
#define off ((uint64_t)0)
|
|
uint64_t sboff;
|
|
uint8_t uuid[16];
|
|
struct mdp_super_block *mdp;
|
|
|
|
dbg("probing at offset 0x%llx, size 0x%llx",
|
|
(unsigned long long) off, (unsigned long long) size);
|
|
|
|
if (size < 0x10000)
|
|
return -1;
|
|
|
|
sboff = (size & ~(MD_RESERVED_BYTES - 1)) - MD_RESERVED_BYTES;
|
|
mdp = volume_id_get_buffer(id, off + sboff, 0x800);
|
|
if (mdp == NULL)
|
|
return -1;
|
|
|
|
if (mdp->md_magic != cpu_to_le32(MD_MAGIC))
|
|
return -1;
|
|
|
|
*(aliased_uint32_t*)uuid = mdp->set_uuid0;
|
|
memcpy(&uuid[4], &mdp->set_uuid1, 12);
|
|
volume_id_set_uuid(id, uuid, UUID_DCE);
|
|
|
|
// snprintf(id->type_version, sizeof(id->type_version)-1, "%u.%u.%u",
|
|
// le32_to_cpu(mdp->major_version),
|
|
// le32_to_cpu(mdp->minor_version),
|
|
// le32_to_cpu(mdp->patch_version));
|
|
|
|
dbg("found raid signature");
|
|
// volume_id_set_usage(id, VOLUME_ID_RAID);
|
|
IF_FEATURE_BLKID_TYPE(id->type = "linux_raid_member";)
|
|
|
|
return 0;
|
|
}
|