mirror of
https://github.com/sheumann/hush.git
synced 2024-12-30 05:29:47 +00:00
893009644f
function old new delta volume_id_probe_iso9660 324 327 +3 volume_id_probe_vfat 902 903 +1 volume_id_probe_udf 576 577 +1 volume_id_probe_ntfs 314 315 +1 uuidcache_check_device 292 291 -1 volume_id_probe_xfs 87 85 -2 volume_id_probe_sysv 165 163 -2 volume_id_probe_romfs 89 87 -2 volume_id_probe_reiserfs 236 234 -2 volume_id_probe_ocfs2 96 94 -2 volume_id_probe_luks 78 76 -2 volume_id_probe_linux_swap 165 163 -2 volume_id_probe_jfs 96 94 -2 volume_id_probe_hfs_hfsplus 795 793 -2 volume_id_probe_ext 82 80 -2 volume_id_probe_cramfs 59 57 -2 volume_id_probe_btrfs 96 94 -2 free_volume_id 36 31 -5 volume_id_probe_linux_raid 127 119 -8 volume_id_probe_all 152 138 -14 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 4/16 up/down: 6/-52) Total: -46 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
195 lines
5.3 KiB
C
195 lines
5.3 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 ntfs_super_block {
|
|
uint8_t jump[3];
|
|
uint8_t oem_id[8];
|
|
uint16_t bytes_per_sector;
|
|
uint8_t sectors_per_cluster;
|
|
uint16_t reserved_sectors;
|
|
uint8_t fats;
|
|
uint16_t root_entries;
|
|
uint16_t sectors;
|
|
uint8_t media_type;
|
|
uint16_t sectors_per_fat;
|
|
uint16_t sectors_per_track;
|
|
uint16_t heads;
|
|
uint32_t hidden_sectors;
|
|
uint32_t large_sectors;
|
|
uint16_t unused[2];
|
|
uint64_t number_of_sectors;
|
|
uint64_t mft_cluster_location;
|
|
uint64_t mft_mirror_cluster_location;
|
|
int8_t cluster_per_mft_record;
|
|
uint8_t reserved1[3];
|
|
int8_t cluster_per_index_record;
|
|
uint8_t reserved2[3];
|
|
uint8_t volume_serial[8];
|
|
uint16_t checksum;
|
|
} PACKED;
|
|
|
|
struct master_file_table_record {
|
|
uint8_t magic[4];
|
|
uint16_t usa_ofs;
|
|
uint16_t usa_count;
|
|
uint64_t lsn;
|
|
uint16_t sequence_number;
|
|
uint16_t link_count;
|
|
uint16_t attrs_offset;
|
|
uint16_t flags;
|
|
uint32_t bytes_in_use;
|
|
uint32_t bytes_allocated;
|
|
} PACKED;
|
|
|
|
struct file_attribute {
|
|
uint32_t type;
|
|
uint32_t len;
|
|
uint8_t non_resident;
|
|
uint8_t name_len;
|
|
uint16_t name_offset;
|
|
uint16_t flags;
|
|
uint16_t instance;
|
|
uint32_t value_len;
|
|
uint16_t value_offset;
|
|
} PACKED;
|
|
|
|
struct volume_info {
|
|
uint64_t reserved;
|
|
uint8_t major_ver;
|
|
uint8_t minor_ver;
|
|
} PACKED;
|
|
|
|
#define MFT_RECORD_VOLUME 3
|
|
#define MFT_RECORD_ATTR_VOLUME_NAME 0x60
|
|
#define MFT_RECORD_ATTR_VOLUME_INFO 0x70
|
|
#define MFT_RECORD_ATTR_OBJECT_ID 0x40
|
|
#define MFT_RECORD_ATTR_END 0xffffffffu
|
|
|
|
int FAST_FUNC volume_id_probe_ntfs(struct volume_id *id /*,uint64_t off*/)
|
|
{
|
|
#define off ((uint64_t)0)
|
|
unsigned sector_size;
|
|
unsigned cluster_size;
|
|
uint64_t mft_cluster;
|
|
uint64_t mft_off;
|
|
unsigned mft_record_size;
|
|
unsigned attr_type;
|
|
unsigned attr_off;
|
|
unsigned attr_len;
|
|
unsigned val_off;
|
|
unsigned val_len;
|
|
struct master_file_table_record *mftr;
|
|
struct ntfs_super_block *ns;
|
|
const uint8_t *buf;
|
|
const uint8_t *val;
|
|
|
|
dbg("probing at offset 0x%llx", (unsigned long long) off);
|
|
|
|
ns = volume_id_get_buffer(id, off, 0x200);
|
|
if (ns == NULL)
|
|
return -1;
|
|
|
|
if (memcmp(ns->oem_id, "NTFS", 4) != 0)
|
|
return -1;
|
|
|
|
volume_id_set_uuid(id, ns->volume_serial, UUID_NTFS);
|
|
|
|
sector_size = le16_to_cpu(ns->bytes_per_sector);
|
|
cluster_size = ns->sectors_per_cluster * sector_size;
|
|
mft_cluster = le64_to_cpu(ns->mft_cluster_location);
|
|
mft_off = mft_cluster * cluster_size;
|
|
|
|
if (ns->cluster_per_mft_record < 0)
|
|
/* size = -log2(mft_record_size); normally 1024 Bytes */
|
|
mft_record_size = 1 << -ns->cluster_per_mft_record;
|
|
else
|
|
mft_record_size = ns->cluster_per_mft_record * cluster_size;
|
|
|
|
dbg("sectorsize 0x%x", sector_size);
|
|
dbg("clustersize 0x%x", cluster_size);
|
|
dbg("mftcluster %llu", (unsigned long long) mft_cluster);
|
|
dbg("mftoffset 0x%llx", (unsigned long long) mft_off);
|
|
dbg("cluster per mft_record %i", ns->cluster_per_mft_record);
|
|
dbg("mft record size %i", mft_record_size);
|
|
|
|
buf = volume_id_get_buffer(id, off + mft_off + (MFT_RECORD_VOLUME * mft_record_size),
|
|
mft_record_size);
|
|
if (buf == NULL)
|
|
goto found;
|
|
|
|
mftr = (struct master_file_table_record*) buf;
|
|
|
|
dbg("mftr->magic '%c%c%c%c'", mftr->magic[0], mftr->magic[1], mftr->magic[2], mftr->magic[3]);
|
|
if (memcmp(mftr->magic, "FILE", 4) != 0)
|
|
goto found;
|
|
|
|
attr_off = le16_to_cpu(mftr->attrs_offset);
|
|
dbg("file $Volume's attributes are at offset %i", attr_off);
|
|
|
|
while (1) {
|
|
struct file_attribute *attr;
|
|
|
|
attr = (struct file_attribute*) &buf[attr_off];
|
|
attr_type = le32_to_cpu(attr->type);
|
|
attr_len = le16_to_cpu(attr->len);
|
|
val_off = le16_to_cpu(attr->value_offset);
|
|
val_len = le32_to_cpu(attr->value_len);
|
|
attr_off += attr_len;
|
|
|
|
if (attr_len == 0)
|
|
break;
|
|
|
|
if (attr_off >= mft_record_size)
|
|
break;
|
|
|
|
if (attr_type == MFT_RECORD_ATTR_END)
|
|
break;
|
|
|
|
dbg("found attribute type 0x%x, len %i, at offset %i",
|
|
attr_type, attr_len, attr_off);
|
|
|
|
// if (attr_type == MFT_RECORD_ATTR_VOLUME_INFO) {
|
|
// struct volume_info *info;
|
|
// dbg("found info, len %i", val_len);
|
|
// info = (struct volume_info*) (((uint8_t *) attr) + val_off);
|
|
// snprintf(id->type_version, sizeof(id->type_version)-1,
|
|
// "%u.%u", info->major_ver, info->minor_ver);
|
|
// }
|
|
|
|
if (attr_type == MFT_RECORD_ATTR_VOLUME_NAME) {
|
|
dbg("found label, len %i", val_len);
|
|
if (val_len > VOLUME_ID_LABEL_SIZE)
|
|
val_len = VOLUME_ID_LABEL_SIZE;
|
|
|
|
val = ((uint8_t *) attr) + val_off;
|
|
// volume_id_set_label_raw(id, val, val_len);
|
|
volume_id_set_label_unicode16(id, val, LE, val_len);
|
|
}
|
|
}
|
|
|
|
found:
|
|
// volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
|
|
// id->type = "ntfs";
|
|
|
|
return 0;
|
|
}
|