259 lines
5.7 KiB
C
259 lines
5.7 KiB
C
/*
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* Copyright (C) 2008 Karel Zak <kzak@redhat.com>
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*
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* Inspired by libvolume_id by
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* Kay Sievers <kay.sievers@vrfy.org>
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*
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* This file may be redistributed under the terms of the
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* GNU Lesser General Public License.
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*/
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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 <stdint.h>
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#include <stddef.h>
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#include "superblocks.h"
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struct ufs_super_block {
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uint32_t fs_link;
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uint32_t fs_rlink;
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uint32_t fs_sblkno;
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uint32_t fs_cblkno;
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uint32_t fs_iblkno;
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uint32_t fs_dblkno;
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uint32_t fs_cgoffset;
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uint32_t fs_cgmask;
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uint32_t fs_time;
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uint32_t fs_size;
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uint32_t fs_dsize;
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uint32_t fs_ncg;
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uint32_t fs_bsize;
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uint32_t fs_fsize;
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uint32_t fs_frag;
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uint32_t fs_minfree;
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uint32_t fs_rotdelay;
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uint32_t fs_rps;
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uint32_t fs_bmask;
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uint32_t fs_fmask;
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uint32_t fs_bshift;
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uint32_t fs_fshift;
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uint32_t fs_maxcontig;
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uint32_t fs_maxbpg;
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uint32_t fs_fragshift;
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uint32_t fs_fsbtodb;
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uint32_t fs_sbsize;
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uint32_t fs_csmask;
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uint32_t fs_csshift;
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uint32_t fs_nindir;
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uint32_t fs_inopb;
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uint32_t fs_nspf;
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uint32_t fs_optim;
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uint32_t fs_npsect_state;
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uint32_t fs_interleave;
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uint32_t fs_trackskew;
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uint32_t fs_id[2];
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uint32_t fs_csaddr;
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uint32_t fs_cssize;
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uint32_t fs_cgsize;
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uint32_t fs_ntrak;
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uint32_t fs_nsect;
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uint32_t fs_spc;
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uint32_t fs_ncyl;
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uint32_t fs_cpg;
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uint32_t fs_ipg;
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uint32_t fs_fpg;
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struct ufs_csum {
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uint32_t cs_ndir;
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uint32_t cs_nbfree;
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uint32_t cs_nifree;
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uint32_t cs_nffree;
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} fs_cstotal;
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int8_t fs_fmod;
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int8_t fs_clean;
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int8_t fs_ronly;
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int8_t fs_flags;
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union {
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struct {
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int8_t fs_fsmnt[512];
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uint32_t fs_cgrotor;
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uint32_t fs_csp[31];
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uint32_t fs_maxcluster;
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uint32_t fs_cpc;
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uint16_t fs_opostbl[16][8];
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} fs_u1;
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struct {
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int8_t fs_fsmnt[468];
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uint8_t fs_volname[32];
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uint64_t fs_swuid;
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int32_t fs_pad;
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uint32_t fs_cgrotor;
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uint32_t fs_ocsp[28];
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uint32_t fs_contigdirs;
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uint32_t fs_csp;
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uint32_t fs_maxcluster;
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uint32_t fs_active;
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int32_t fs_old_cpc;
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int32_t fs_maxbsize;
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int64_t fs_sparecon64[17];
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int64_t fs_sblockloc;
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struct ufs2_csum_total {
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uint64_t cs_ndir;
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uint64_t cs_nbfree;
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uint64_t cs_nifree;
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uint64_t cs_nffree;
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uint64_t cs_numclusters;
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uint64_t cs_spare[3];
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} fs_cstotal;
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struct ufs_timeval {
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int32_t tv_sec;
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int32_t tv_usec;
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} fs_time;
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int64_t fs_size;
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int64_t fs_dsize;
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uint64_t fs_csaddr;
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int64_t fs_pendingblocks;
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int32_t fs_pendinginodes;
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} __attribute__((packed)) fs_u2;
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} fs_u11;
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union {
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struct {
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int32_t fs_sparecon[53];
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int32_t fs_reclaim;
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int32_t fs_sparecon2[1];
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int32_t fs_state;
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uint32_t fs_qbmask[2];
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uint32_t fs_qfmask[2];
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} fs_sun;
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struct {
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int32_t fs_sparecon[53];
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int32_t fs_reclaim;
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int32_t fs_sparecon2[1];
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uint32_t fs_npsect;
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uint32_t fs_qbmask[2];
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uint32_t fs_qfmask[2];
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} fs_sunx86;
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struct {
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int32_t fs_sparecon[50];
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int32_t fs_contigsumsize;
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int32_t fs_maxsymlinklen;
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int32_t fs_inodefmt;
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uint32_t fs_maxfilesize[2];
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uint32_t fs_qbmask[2];
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uint32_t fs_qfmask[2];
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int32_t fs_state;
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} fs_44;
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} fs_u2;
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int32_t fs_postblformat;
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int32_t fs_nrpos;
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int32_t fs_postbloff;
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int32_t fs_rotbloff;
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uint32_t fs_magic;
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uint8_t fs_space[1];
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} __attribute__((packed));
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#define UFS_MAGIC 0x00011954
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#define UFS2_MAGIC 0x19540119
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#define UFS_MAGIC_FEA 0x00195612
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#define UFS_MAGIC_LFN 0x00095014
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#define UFS_MAGIC_SEC 0x00612195
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#define UFS_MAGIC_4GB 0x05231994
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static int probe_ufs(blkid_probe pr,
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const struct blkid_idmag *mag __attribute__((__unused__)))
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{
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int offsets[] = { 0, 8, 64, 256 };
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uint32_t mags[] = {
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UFS2_MAGIC, UFS_MAGIC, UFS_MAGIC_FEA, UFS_MAGIC_LFN,
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UFS_MAGIC_SEC, UFS_MAGIC_4GB
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};
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size_t i;
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uint32_t magic;
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struct ufs_super_block *ufs;
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int is_be;
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for (i = 0; i < ARRAY_SIZE(offsets); i++) {
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uint32_t magLE, magBE;
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size_t y;
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ufs = (struct ufs_super_block *)
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blkid_probe_get_buffer(pr,
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offsets[i] * 1024,
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sizeof(struct ufs_super_block));
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if (!ufs)
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return -1;
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magBE = be32_to_cpu(ufs->fs_magic);
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magLE = le32_to_cpu(ufs->fs_magic);
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for (y = 0; y < ARRAY_SIZE(mags); y++) {
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if (magLE == mags[y] || magBE == mags[y]) {
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magic = mags[y];
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is_be = (magBE == mags[y]);
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goto found;
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}
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}
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}
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return 1;
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found:
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if (magic == UFS2_MAGIC) {
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blkid_probe_set_version(pr, "2");
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blkid_probe_set_label(pr, ufs->fs_u11.fs_u2.fs_volname,
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sizeof(ufs->fs_u11.fs_u2.fs_volname));
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} else
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blkid_probe_set_version(pr, "1");
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if (ufs->fs_id[0] || ufs->fs_id[1])
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{
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if (is_be)
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blkid_probe_sprintf_uuid(pr,
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(unsigned char *) &ufs->fs_id,
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sizeof(ufs->fs_id),
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"%08x%08x",
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be32_to_cpu(ufs->fs_id[0]),
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be32_to_cpu(ufs->fs_id[1]));
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else
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blkid_probe_sprintf_uuid(pr,
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(unsigned char *) &ufs->fs_id,
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sizeof(ufs->fs_id),
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"%08x%08x",
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le32_to_cpu(ufs->fs_id[0]),
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le32_to_cpu(ufs->fs_id[1]));
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}
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if (blkid_probe_set_magic(pr,
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(offsets[i] * 1024) +
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offsetof(struct ufs_super_block, fs_magic),
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sizeof(ufs->fs_magic),
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(unsigned char *) &ufs->fs_magic))
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return -1;
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return 0;
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}
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/*
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* According to libvolume_id the UFS superblock could be on four positions.
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* The original libblkid has checked one position (.kboff=8) only.
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*
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* We know four UFS magic strings and UFS could be both little-endian and
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* big-endian. ... so we have:
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*
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* 4 position * 4 string * 2 version = 32 magic strings
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*
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* It seems simpler to check for these string in probing function that hardcode
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* all in the .magic array.
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*/
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const struct blkid_idinfo ufs_idinfo =
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{
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.name = "ufs",
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.usage = BLKID_USAGE_FILESYSTEM,
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.probefunc = probe_ufs,
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.magics = BLKID_NONE_MAGIC
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};
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