mirror of
https://github.com/systemd/systemd-stable.git
synced 2024-12-25 23:21:33 +03:00
67 lines
1.4 KiB
C
67 lines
1.4 KiB
C
/*
|
|
* volume_id - reads filesystem label and uuid
|
|
*
|
|
* Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation version 2 of the License.
|
|
*/
|
|
|
|
#ifndef _GNU_SOURCE
|
|
#define _GNU_SOURCE 1
|
|
#endif
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <ctype.h>
|
|
|
|
#include "volume_id.h"
|
|
#include "logging.h"
|
|
#include "util.h"
|
|
|
|
struct xfs_super_block {
|
|
uint8_t magic[4];
|
|
uint32_t blocksize;
|
|
uint64_t dblocks;
|
|
uint64_t rblocks;
|
|
uint32_t dummy1[2];
|
|
uint8_t uuid[16];
|
|
uint32_t dummy2[15];
|
|
uint8_t fname[12];
|
|
uint32_t dummy3[2];
|
|
uint64_t icount;
|
|
uint64_t ifree;
|
|
uint64_t fdblocks;
|
|
} PACKED;
|
|
|
|
int volume_id_probe_xfs(struct volume_id *id, uint64_t off)
|
|
{
|
|
struct xfs_super_block *xs;
|
|
|
|
dbg("probing at offset 0x%llx", (unsigned long long) off);
|
|
|
|
xs = (struct xfs_super_block *) volume_id_get_buffer(id, off, 0x200);
|
|
if (xs == NULL)
|
|
return -1;
|
|
|
|
if (memcmp(xs->magic, "XFSB", 4) != 0)
|
|
return -1;
|
|
|
|
volume_id_set_label_raw(id, xs->fname, 12);
|
|
volume_id_set_label_string(id, xs->fname, 12);
|
|
volume_id_set_uuid(id, xs->uuid, UUID_DCE);
|
|
|
|
volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
|
|
id->type = "xfs";
|
|
|
|
return 0;
|
|
}
|