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 //kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_NVIDIARAID) += nvidia_raid.o
  22
  23 //config:
  24 //config:### config FEATURE_VOLUMEID_NVIDIARAID
  25 //config:###    bool "nvidia raid"
  26 //config:###    default y
  27 //config:###    depends on VOLUMEID
  28 //config:###    help
  29 //config:###      TODO
  30 //config:
  31
  32 #include "volume_id_internal.h"
  33
  34 struct nvidia_meta {
  35         uint8_t         vendor[8];
  36         uint32_t        size;
  37         uint32_t        chksum;
  38         uint16_t        version;
  39 } PACKED;
  40
  41 #define NVIDIA_SIGNATURE                "NVIDIA"
  42
  43 int FAST_FUNC volume_id_probe_nvidia_raid(struct volume_id *id, uint64_t off, uint64_t size)
  44 {
  45         uint64_t meta_off;
  46         struct nvidia_meta *nv;
  47
  48         dbg("probing at offset 0x%llx, size 0x%llx",
  49             (unsigned long long) off, (unsigned long long) size);
  50
  51         if (size < 0x10000)
  52                 return -1;
  53
  54         meta_off = ((size / 0x200)-2) * 0x200;
  55         nv = volume_id_get_buffer(id, off + meta_off, 0x200);
  56         if (nv == NULL)
  57                 return -1;
  58
  59         if (memcmp(nv->vendor, NVIDIA_SIGNATURE, sizeof(NVIDIA_SIGNATURE)-1) != 0)
  60                 return -1;
  61
  62 //      volume_id_set_usage(id, VOLUME_ID_RAID);
  63 //      snprintf(id->type_version, sizeof(id->type_version)-1, "%u", le16_to_cpu(nv->version));
  64 //      id->type = "nvidia_raid_member";
  65
  66         return 0;
  67 }