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ufs.c

/*
 * volume_id - reads filesystem label and uuid
 *
 * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License as published by the Free Software Foundation; either
 *    version 2.1 of the License, or (at your option) any later version.
 *
 *    This library is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 *    Lesser General Public License for more details.
 *
 *    You should have received a copy of the GNU Lesser General Public
 *    License along with this library; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#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 <asm/types.h>

#include "volume_id.h"
#include "logging.h"
#include "util.h"
#include "ufs.h"

struct ufs_super_block {
      __u32 fs_link;
      __u32 fs_rlink;
      __u32 fs_sblkno;
      __u32 fs_cblkno;
      __u32 fs_iblkno;
      __u32 fs_dblkno;
      __u32 fs_cgoffset;
      __u32 fs_cgmask;
      __u32 fs_time;
      __u32 fs_size;
      __u32 fs_dsize;
      __u32 fs_ncg;     
      __u32 fs_bsize;
      __u32 fs_fsize;
      __u32 fs_frag;
      __u32 fs_minfree;
      __u32 fs_rotdelay;
      __u32 fs_rps;     
      __u32 fs_bmask;
      __u32 fs_fmask;
      __u32 fs_bshift;
      __u32 fs_fshift;
      __u32 fs_maxcontig;
      __u32 fs_maxbpg;
      __u32 fs_fragshift;
      __u32 fs_fsbtodb;
      __u32 fs_sbsize;
      __u32 fs_csmask;
      __u32 fs_csshift;
      __u32 fs_nindir;
      __u32 fs_inopb;
      __u32 fs_nspf;
      __u32 fs_optim;
      __u32 fs_npsect_state;
      __u32 fs_interleave;
      __u32 fs_trackskew;
      __u32 fs_id[2];
      __u32 fs_csaddr;
      __u32 fs_cssize;
      __u32 fs_cgsize;
      __u32 fs_ntrak;
      __u32 fs_nsect;
      __u32 fs_spc;     
      __u32 fs_ncyl;
      __u32 fs_cpg;
      __u32 fs_ipg;
      __u32 fs_fpg;
      struct ufs_csum {
            __u32 cs_ndir;
            __u32 cs_nbfree;
            __u32 cs_nifree;
            __u32 cs_nffree;
      } __attribute__((__packed__)) fs_cstotal;
      __s8  fs_fmod;
      __s8  fs_clean;
      __s8  fs_ronly;
      __s8  fs_flags;
      union {
            struct {
                  __s8  fs_fsmnt[512];
                  __u32 fs_cgrotor;
                  __u32 fs_csp[31];
                  __u32 fs_maxcluster;
                  __u32 fs_cpc;
                  __u16 fs_opostbl[16][8];
            } __attribute__((__packed__)) fs_u1;
            struct {
                  __s8  fs_fsmnt[468];
                  __u8  fs_volname[32];
                  __u64 fs_swuid;
                  __s32 fs_pad;
                  __u32 fs_cgrotor;
                  __u32 fs_ocsp[28];
                  __u32 fs_contigdirs;
                  __u32 fs_csp;     
                  __u32 fs_maxcluster;
                  __u32 fs_active;
                  __s32 fs_old_cpc;
                  __s32 fs_maxbsize;
                  __s64 fs_sparecon64[17];
                  __s64 fs_sblockloc;
                  struct ufs2_csum_total {
                        __u64 cs_ndir;
                        __u64 cs_nbfree;
                        __u64 cs_nifree;
                        __u64 cs_nffree;
                        __u64 cs_numclusters;
                        __u64 cs_spare[3];
                  } __attribute__((__packed__)) fs_cstotal;
                  struct ufs_timeval {
                        __s32 tv_sec;
                        __s32 tv_usec;
                  } __attribute__((__packed__)) fs_time;
                  __s64 fs_size;
                  __s64 fs_dsize;
                  __u64 fs_csaddr;
                  __s64 fs_pendingblocks;
                  __s32 fs_pendinginodes;
            } __attribute__((__packed__)) fs_u2;
      }  fs_u11;
      union {
            struct {
                  __s32 fs_sparecon[53];
                  __s32 fs_reclaim;
                  __s32 fs_sparecon2[1];
                  __s32 fs_state;
                  __u32 fs_qbmask[2];
                  __u32 fs_qfmask[2];
            } __attribute__((__packed__)) fs_sun;
            struct {
                  __s32 fs_sparecon[53];
                  __s32 fs_reclaim;
                  __s32 fs_sparecon2[1];
                  __u32 fs_npsect;
                  __u32 fs_qbmask[2];
                  __u32 fs_qfmask[2];
            } __attribute__((__packed__)) fs_sunx86;
            struct {
                  __s32 fs_sparecon[50];
                  __s32 fs_contigsumsize;
                  __s32 fs_maxsymlinklen;
                  __s32 fs_inodefmt;
                  __u32 fs_maxfilesize[2];
                  __u32 fs_qbmask[2];
                  __u32 fs_qfmask[2];
                  __s32 fs_state;
            } __attribute__((__packed__)) fs_44;
      } fs_u2;
      __s32 fs_postblformat;
      __s32 fs_nrpos;
      __s32 fs_postbloff;
      __s32 fs_rotbloff;
      __u32 fs_magic;
      __u8  fs_space[1];
} __attribute__((__packed__));

#define UFS_MAGIC             0x00011954
#define UFS2_MAGIC                  0x19540119
#define UFS_MAGIC_FEA               0x00195612
#define UFS_MAGIC_LFN               0x00095014

int volume_id_probe_ufs(struct volume_id *id, __u64 off)
{
      __u32 magic;
      int   i;
      struct ufs_super_block *ufs;
      int   offsets[] = {0, 8, 64, 256, -1};

      dbg("probing at offset 0x%llx", (unsigned long long) off);

      for (i = 0; offsets[i] >= 0; i++) { 
            ufs = (struct ufs_super_block *) volume_id_get_buffer(id, off + (offsets[i] * 0x400), 0x800);
            if (ufs == NULL)
                  return -1;

            dbg("offset 0x%x", offsets[i] * 0x400);
            magic = be32_to_cpu(ufs->fs_magic);
            if ((magic == UFS_MAGIC) ||
                (magic == UFS2_MAGIC) ||
                (magic == UFS_MAGIC_FEA) ||
                (magic == UFS_MAGIC_LFN)) {
                  dbg("magic 0x%08x(be)", magic);
                  goto found;
            }
            magic = le32_to_cpu(ufs->fs_magic);
            if ((magic == UFS_MAGIC) ||
                (magic == UFS2_MAGIC) ||
                (magic == UFS_MAGIC_FEA) ||
                (magic == UFS_MAGIC_LFN)) {
                  dbg("magic 0x%08x(le)", magic);
                  goto found;
            }
      }
      return -1;

found:
      volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
      id->type = "ufs";

      return 0;
}

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