mirror of
https://github.com/sheumann/hush.git
synced 2024-08-16 09:29:16 +00:00
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
194 lines
5.1 KiB
C
194 lines
5.1 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 msdos_partition_entry {
|
|
uint8_t boot_ind;
|
|
uint8_t head;
|
|
uint8_t sector;
|
|
uint8_t cyl;
|
|
uint8_t sys_ind;
|
|
uint8_t end_head;
|
|
uint8_t end_sector;
|
|
uint8_t end_cyl;
|
|
uint32_t start_sect;
|
|
uint32_t nr_sects;
|
|
} __attribute__((packed));
|
|
|
|
#define MSDOS_PARTTABLE_OFFSET 0x1be
|
|
#define MSDOS_SIG_OFF 0x1fe
|
|
#define BSIZE 0x200
|
|
#define DOS_EXTENDED_PARTITION 0x05
|
|
#define LINUX_EXTENDED_PARTITION 0x85
|
|
#define WIN98_EXTENDED_PARTITION 0x0f
|
|
#define LINUX_RAID_PARTITION 0xfd
|
|
#define is_extended(type) \
|
|
(type == DOS_EXTENDED_PARTITION || \
|
|
type == WIN98_EXTENDED_PARTITION || \
|
|
type == LINUX_EXTENDED_PARTITION)
|
|
#define is_raid(type) \
|
|
(type == LINUX_RAID_PARTITION)
|
|
|
|
int volume_id_probe_msdos_part_table(struct volume_id *id, uint64_t off)
|
|
{
|
|
const uint8_t *buf;
|
|
int i;
|
|
uint64_t poff;
|
|
uint64_t plen;
|
|
uint64_t extended = 0;
|
|
uint64_t current;
|
|
uint64_t next;
|
|
int limit;
|
|
int empty = 1;
|
|
struct msdos_partition_entry *part;
|
|
struct volume_id_partition *p;
|
|
|
|
dbg("probing at offset 0x%llx", (unsigned long long) off);
|
|
|
|
buf = volume_id_get_buffer(id, off, 0x200);
|
|
if (buf == NULL)
|
|
return -1;
|
|
|
|
if (buf[MSDOS_SIG_OFF] != 0x55 || buf[MSDOS_SIG_OFF + 1] != 0xaa)
|
|
return -1;
|
|
|
|
/* check flags on all entries for a valid partition table */
|
|
part = (struct msdos_partition_entry*) &buf[MSDOS_PARTTABLE_OFFSET];
|
|
for (i = 0; i < 4; i++) {
|
|
if (part[i].boot_ind != 0 &&
|
|
part[i].boot_ind != 0x80)
|
|
return -1;
|
|
|
|
if (part[i].nr_sects != 0)
|
|
empty = 0;
|
|
}
|
|
if (empty == 1)
|
|
return -1;
|
|
|
|
if (id->partitions != NULL)
|
|
free(id->partitions);
|
|
id->partitions = xzalloc(VOLUME_ID_PARTITIONS_MAX *
|
|
sizeof(struct volume_id_partition));
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
poff = (uint64_t) le32_to_cpu(part[i].start_sect) * BSIZE;
|
|
plen = (uint64_t) le32_to_cpu(part[i].nr_sects) * BSIZE;
|
|
|
|
if (plen == 0)
|
|
continue;
|
|
|
|
p = &id->partitions[i];
|
|
|
|
// p->pt_type_raw = part[i].sys_ind;
|
|
|
|
if (is_extended(part[i].sys_ind)) {
|
|
dbg("found extended partition at 0x%llx", (unsigned long long) poff);
|
|
// volume_id_set_usage_part(p, VOLUME_ID_PARTITIONTABLE);
|
|
// p->type = "msdos_extended_partition";
|
|
if (extended == 0)
|
|
extended = off + poff;
|
|
} else {
|
|
dbg("found 0x%x data partition at 0x%llx, len 0x%llx",
|
|
part[i].sys_ind, (unsigned long long) poff, (unsigned long long) plen);
|
|
|
|
// if (is_raid(part[i].sys_ind))
|
|
// volume_id_set_usage_part(p, VOLUME_ID_RAID);
|
|
// else
|
|
// volume_id_set_usage_part(p, VOLUME_ID_UNPROBED);
|
|
}
|
|
|
|
// p->pt_off = off + poff;
|
|
// p->pt_len = plen;
|
|
id->partition_count = i+1;
|
|
}
|
|
|
|
next = extended;
|
|
current = extended;
|
|
limit = 50;
|
|
|
|
/* follow extended partition chain and add data partitions */
|
|
while (next != 0) {
|
|
if (limit-- == 0) {
|
|
dbg("extended chain limit reached");
|
|
break;
|
|
}
|
|
|
|
buf = volume_id_get_buffer(id, current, 0x200);
|
|
if (buf == NULL)
|
|
break;
|
|
|
|
part = (struct msdos_partition_entry*) &buf[MSDOS_PARTTABLE_OFFSET];
|
|
|
|
if (buf[MSDOS_SIG_OFF] != 0x55 || buf[MSDOS_SIG_OFF + 1] != 0xaa)
|
|
break;
|
|
|
|
next = 0;
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
poff = (uint64_t) le32_to_cpu(part[i].start_sect) * BSIZE;
|
|
plen = (uint64_t) le32_to_cpu(part[i].nr_sects) * BSIZE;
|
|
|
|
if (plen == 0)
|
|
continue;
|
|
|
|
if (is_extended(part[i].sys_ind)) {
|
|
dbg("found extended partition at 0x%llx", (unsigned long long) poff);
|
|
if (next == 0)
|
|
next = extended + poff;
|
|
} else {
|
|
dbg("found 0x%x data partition at 0x%llx, len 0x%llx",
|
|
part[i].sys_ind, (unsigned long long) poff, (unsigned long long) plen);
|
|
|
|
/* we always start at the 5th entry */
|
|
// while (id->partition_count < 4)
|
|
// volume_id_set_usage_part(&id->partitions[id->partition_count++], VOLUME_ID_UNUSED);
|
|
if (id->partition_count < 4)
|
|
id->partition_count = 4;
|
|
|
|
p = &id->partitions[id->partition_count];
|
|
|
|
// if (is_raid(part[i].sys_ind))
|
|
// volume_id_set_usage_part(p, VOLUME_ID_RAID);
|
|
// else
|
|
// volume_id_set_usage_part(p, VOLUME_ID_UNPROBED);
|
|
|
|
// p->pt_off = current + poff;
|
|
// p->pt_len = plen;
|
|
id->partition_count++;
|
|
|
|
// p->pt_type_raw = part[i].sys_ind;
|
|
|
|
if (id->partition_count >= VOLUME_ID_PARTITIONS_MAX) {
|
|
dbg("too many partitions");
|
|
next = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
current = next;
|
|
}
|
|
|
|
// volume_id_set_usage(id, VOLUME_ID_PARTITIONTABLE);
|
|
// id->type = "msdos_partition_table";
|
|
|
|
return 0;
|
|
}
|