LXR busybox/util-linux/volume

   1/*
   2 * volume_id - reads filesystem label and uuid
   3 *
   4 * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
   5 *
   6 *      This library is free software; you can redistribute it and/or
   7 *      modify it under the terms of the GNU Lesser General Public
   8 *      License as published by the Free Software Foundation; either
   9 *      version 2.1 of the License, or (at your option) any later version.
  10 *
  11 *      This library is distributed in the hope that it will be useful,
  12 *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14 *      Lesser General Public License for more details.
  15 *
  16 *      You should have received a copy of the GNU Lesser General Public
  17 *      License along with this library; if not, write to the Free Software
  18 *      Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19 */
  20
  21#include "volume_id_internal.h"
  22
  23struct xfs_super_block {
  24        uint8_t magic[4];
  25        uint32_t        blocksize;
  26        uint64_t        dblocks;
  27        uint64_t        rblocks;
  28        uint32_t        dummy1[2];
  29        uint8_t uuid[16];
  30        uint32_t        dummy2[15];
  31        uint8_t fname[12];
  32        uint32_t        dummy3[2];
  33        uint64_t        icount;
  34        uint64_t        ifree;
  35        uint64_t        fdblocks;
  36} __attribute__((__packed__));
  37
  38int volume_id_probe_xfs(struct volume_id *id /*,uint64_t off*/)
  39{
  40#define off ((uint64_t)0)
  41        struct xfs_super_block *xs;
  42
  43        dbg("probing at offset 0x%llx", (unsigned long long) off);
  44
  45        xs = volume_id_get_buffer(id, off, 0x200);
  46        if (xs == NULL)
  47                return -1;
  48
  49        if (memcmp(xs->magic, "XFSB", 4) != 0)
  50                return -1;
  51
  52//      volume_id_set_label_raw(id, xs->fname, 12);
  53        volume_id_set_label_string(id, xs->fname, 12);
  54        volume_id_set_uuid(id, xs->uuid, UUID_DCE);
  55
  56//      volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
  57//      id->type = "xfs";
  58
  59        return 0;
  60}
  61