f560422fa0
Redundant help texts (one which only repeats the description) are deleted. Descriptions and help texts are trimmed. Some config options are moved, even across menus. No config option _names_ are changed. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
86 lines
2.5 KiB
C
86 lines
2.5 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_LINUXSWAP) += linux_swap.o
|
|
|
|
//config:config FEATURE_VOLUMEID_LINUXSWAP
|
|
//config: bool "linux swap filesystem"
|
|
//config: default y
|
|
//config: depends on VOLUMEID
|
|
|
|
#include "volume_id_internal.h"
|
|
|
|
struct swap_header_v1_2 {
|
|
uint8_t bootbits[1024];
|
|
uint32_t version;
|
|
uint32_t last_page;
|
|
uint32_t nr_badpages;
|
|
uint8_t uuid[16];
|
|
uint8_t volume_name[16];
|
|
} PACKED;
|
|
|
|
#define LARGEST_PAGESIZE 0x4000
|
|
|
|
int FAST_FUNC volume_id_probe_linux_swap(struct volume_id *id /*,uint64_t off*/)
|
|
{
|
|
#define off ((uint64_t)0)
|
|
struct swap_header_v1_2 *sw;
|
|
const uint8_t *buf;
|
|
unsigned page;
|
|
|
|
dbg("probing at offset 0x%llx", (unsigned long long) off);
|
|
|
|
/* the swap signature is at the end of the PAGE_SIZE */
|
|
for (page = 0x1000; page <= LARGEST_PAGESIZE; page <<= 1) {
|
|
buf = volume_id_get_buffer(id, off + page-10, 10);
|
|
if (buf == NULL)
|
|
return -1;
|
|
|
|
if (memcmp(buf, "SWAP-SPACE", 10) == 0) {
|
|
// id->type_version[0] = '1';
|
|
// id->type_version[1] = '\0';
|
|
goto found;
|
|
}
|
|
|
|
if (memcmp(buf, "SWAPSPACE2", 10) == 0
|
|
|| memcmp(buf, "S1SUSPEND", 9) == 0
|
|
|| memcmp(buf, "S2SUSPEND", 9) == 0
|
|
|| memcmp(buf, "ULSUSPEND", 9) == 0
|
|
) {
|
|
sw = volume_id_get_buffer(id, off, sizeof(struct swap_header_v1_2));
|
|
if (sw == NULL)
|
|
return -1;
|
|
// id->type_version[0] = '2';
|
|
// id->type_version[1] = '\0';
|
|
// volume_id_set_label_raw(id, sw->volume_name, 16);
|
|
volume_id_set_label_string(id, sw->volume_name, 16);
|
|
volume_id_set_uuid(id, sw->uuid, UUID_DCE);
|
|
goto found;
|
|
}
|
|
}
|
|
return -1;
|
|
|
|
found:
|
|
// volume_id_set_usage(id, VOLUME_ID_OTHER);
|
|
IF_FEATURE_BLKID_TYPE(id->type = "swap";)
|
|
|
|
return 0;
|
|
}
|