60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
/*
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* volume_id - reads filesystem label and uuid
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*
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* Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE 1
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <ctype.h>
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#include "libvolume_id.h"
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#include "libvolume_id-private.h"
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#define VXFS_SUPER_MAGIC 0xa501FCF5
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struct vxfs_super {
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uint32_t vs_magic;
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int32_t vs_version;
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} PACKED;
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int volume_id_probe_vxfs(struct volume_id *id, uint64_t off, uint64_t size)
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{
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struct vxfs_super *vxs;
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info("probing at offset 0x%llx\n", (unsigned long long) off);
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vxs = (struct vxfs_super *) volume_id_get_buffer(id, off + 0x200, 0x200);
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if (vxs == NULL)
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return -1;
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if (vxs->vs_magic == cpu_to_le32(VXFS_SUPER_MAGIC)) {
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snprintf(id->type_version, sizeof(id->type_version)-1, "%u", (unsigned int) vxs->vs_version);
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volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
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id->type = "vxfs";
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return 0;
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}
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return -1;
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}
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