release/src/router/busybox/util-linux/volume_id/unused_nvidia_raid.c

   1 /*
   2  * volume_id - reads filesystem label and uuid
   3  *
   4  * Copyright (C) 2005 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
  23 struct nvidia_meta {
  24         uint8_t         vendor[8];
  25         uint32_t        size;
  26         uint32_t        chksum;
  27         uint16_t        version;
  28 } PACKED;
  29
  30 #define NVIDIA_SIGNATURE                "NVIDIA"
  31
  32 int FAST_FUNC volume_id_probe_nvidia_raid(struct volume_id *id, uint64_t off, uint64_t size)
  33 {
  34         uint64_t meta_off;
  35         struct nvidia_meta *nv;
  36
  37         dbg("probing at offset 0x%llx, size 0x%llx",
  38             (unsigned long long) off, (unsigned long long) size);
  39
  40         if (size < 0x10000)
  41                 return -1;
  42
  43         meta_off = ((size / 0x200)-2) * 0x200;
  44         nv = volume_id_get_buffer(id, off + meta_off, 0x200);
  45         if (nv == NULL)
  46                 return -1;
  47
  48         if (memcmp(nv->vendor, NVIDIA_SIGNATURE, sizeof(NVIDIA_SIGNATURE)-1) != 0)
  49                 return -1;
  50
  51 //      volume_id_set_usage(id, VOLUME_ID_RAID);
  52 //      snprintf(id->type_version, sizeof(id->type_version)-1, "%u", le16_to_cpu(nv->version));
  53 //      id->type = "nvidia_raid_member";
  54
  55         return 0;
  56 }