use libblkid to get filesystem type
we can now use libblkid to detect exfat
diff --git a/libblkid/ufs.c b/libblkid/ufs.c
new file mode 100644
index 0000000..673a528
--- /dev/null
+++ b/libblkid/ufs.c
@@ -0,0 +1,258 @@
+/*
+ * Copyright (C) 2008 Karel Zak <kzak@redhat.com>
+ *
+ * Inspired by libvolume_id by
+ * Kay Sievers <kay.sievers@vrfy.org>
+ *
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <ctype.h>
+#include <stdint.h>
+#include <stddef.h>
+
+#include "superblocks.h"
+
+struct ufs_super_block {
+ uint32_t fs_link;
+ uint32_t fs_rlink;
+ uint32_t fs_sblkno;
+ uint32_t fs_cblkno;
+ uint32_t fs_iblkno;
+ uint32_t fs_dblkno;
+ uint32_t fs_cgoffset;
+ uint32_t fs_cgmask;
+ uint32_t fs_time;
+ uint32_t fs_size;
+ uint32_t fs_dsize;
+ uint32_t fs_ncg;
+ uint32_t fs_bsize;
+ uint32_t fs_fsize;
+ uint32_t fs_frag;
+ uint32_t fs_minfree;
+ uint32_t fs_rotdelay;
+ uint32_t fs_rps;
+ uint32_t fs_bmask;
+ uint32_t fs_fmask;
+ uint32_t fs_bshift;
+ uint32_t fs_fshift;
+ uint32_t fs_maxcontig;
+ uint32_t fs_maxbpg;
+ uint32_t fs_fragshift;
+ uint32_t fs_fsbtodb;
+ uint32_t fs_sbsize;
+ uint32_t fs_csmask;
+ uint32_t fs_csshift;
+ uint32_t fs_nindir;
+ uint32_t fs_inopb;
+ uint32_t fs_nspf;
+ uint32_t fs_optim;
+ uint32_t fs_npsect_state;
+ uint32_t fs_interleave;
+ uint32_t fs_trackskew;
+ uint32_t fs_id[2];
+ uint32_t fs_csaddr;
+ uint32_t fs_cssize;
+ uint32_t fs_cgsize;
+ uint32_t fs_ntrak;
+ uint32_t fs_nsect;
+ uint32_t fs_spc;
+ uint32_t fs_ncyl;
+ uint32_t fs_cpg;
+ uint32_t fs_ipg;
+ uint32_t fs_fpg;
+ struct ufs_csum {
+ uint32_t cs_ndir;
+ uint32_t cs_nbfree;
+ uint32_t cs_nifree;
+ uint32_t cs_nffree;
+ } fs_cstotal;
+ int8_t fs_fmod;
+ int8_t fs_clean;
+ int8_t fs_ronly;
+ int8_t fs_flags;
+ union {
+ struct {
+ int8_t fs_fsmnt[512];
+ uint32_t fs_cgrotor;
+ uint32_t fs_csp[31];
+ uint32_t fs_maxcluster;
+ uint32_t fs_cpc;
+ uint16_t fs_opostbl[16][8];
+ } fs_u1;
+ struct {
+ int8_t fs_fsmnt[468];
+ uint8_t fs_volname[32];
+ uint64_t fs_swuid;
+ int32_t fs_pad;
+ uint32_t fs_cgrotor;
+ uint32_t fs_ocsp[28];
+ uint32_t fs_contigdirs;
+ uint32_t fs_csp;
+ uint32_t fs_maxcluster;
+ uint32_t fs_active;
+ int32_t fs_old_cpc;
+ int32_t fs_maxbsize;
+ int64_t fs_sparecon64[17];
+ int64_t fs_sblockloc;
+ struct ufs2_csum_total {
+ uint64_t cs_ndir;
+ uint64_t cs_nbfree;
+ uint64_t cs_nifree;
+ uint64_t cs_nffree;
+ uint64_t cs_numclusters;
+ uint64_t cs_spare[3];
+ } fs_cstotal;
+ struct ufs_timeval {
+ int32_t tv_sec;
+ int32_t tv_usec;
+ } fs_time;
+ int64_t fs_size;
+ int64_t fs_dsize;
+ uint64_t fs_csaddr;
+ int64_t fs_pendingblocks;
+ int32_t fs_pendinginodes;
+ } __attribute__((packed)) fs_u2;
+ } fs_u11;
+ union {
+ struct {
+ int32_t fs_sparecon[53];
+ int32_t fs_reclaim;
+ int32_t fs_sparecon2[1];
+ int32_t fs_state;
+ uint32_t fs_qbmask[2];
+ uint32_t fs_qfmask[2];
+ } fs_sun;
+ struct {
+ int32_t fs_sparecon[53];
+ int32_t fs_reclaim;
+ int32_t fs_sparecon2[1];
+ uint32_t fs_npsect;
+ uint32_t fs_qbmask[2];
+ uint32_t fs_qfmask[2];
+ } fs_sunx86;
+ struct {
+ int32_t fs_sparecon[50];
+ int32_t fs_contigsumsize;
+ int32_t fs_maxsymlinklen;
+ int32_t fs_inodefmt;
+ uint32_t fs_maxfilesize[2];
+ uint32_t fs_qbmask[2];
+ uint32_t fs_qfmask[2];
+ int32_t fs_state;
+ } fs_44;
+ } fs_u2;
+ int32_t fs_postblformat;
+ int32_t fs_nrpos;
+ int32_t fs_postbloff;
+ int32_t fs_rotbloff;
+ uint32_t fs_magic;
+ uint8_t fs_space[1];
+} __attribute__((packed));
+
+#define UFS_MAGIC 0x00011954
+#define UFS2_MAGIC 0x19540119
+#define UFS_MAGIC_FEA 0x00195612
+#define UFS_MAGIC_LFN 0x00095014
+#define UFS_MAGIC_SEC 0x00612195
+#define UFS_MAGIC_4GB 0x05231994
+
+static int probe_ufs(blkid_probe pr,
+ const struct blkid_idmag *mag __attribute__((__unused__)))
+{
+ int offsets[] = { 0, 8, 64, 256 };
+ uint32_t mags[] = {
+ UFS2_MAGIC, UFS_MAGIC, UFS_MAGIC_FEA, UFS_MAGIC_LFN,
+ UFS_MAGIC_SEC, UFS_MAGIC_4GB
+ };
+ size_t i;
+ uint32_t magic;
+ struct ufs_super_block *ufs;
+ int is_be;
+
+ for (i = 0; i < ARRAY_SIZE(offsets); i++) {
+ uint32_t magLE, magBE;
+ size_t y;
+
+ ufs = (struct ufs_super_block *)
+ blkid_probe_get_buffer(pr,
+ offsets[i] * 1024,
+ sizeof(struct ufs_super_block));
+ if (!ufs)
+ return -1;
+
+ magBE = be32_to_cpu(ufs->fs_magic);
+ magLE = le32_to_cpu(ufs->fs_magic);
+
+ for (y = 0; y < ARRAY_SIZE(mags); y++) {
+ if (magLE == mags[y] || magBE == mags[y]) {
+ magic = mags[y];
+ is_be = (magBE == mags[y]);
+ goto found;
+ }
+ }
+ }
+
+ return 1;
+
+found:
+ if (magic == UFS2_MAGIC) {
+ blkid_probe_set_version(pr, "2");
+ blkid_probe_set_label(pr, ufs->fs_u11.fs_u2.fs_volname,
+ sizeof(ufs->fs_u11.fs_u2.fs_volname));
+ } else
+ blkid_probe_set_version(pr, "1");
+ if (ufs->fs_id[0] || ufs->fs_id[1])
+ {
+ if (is_be)
+ blkid_probe_sprintf_uuid(pr,
+ (unsigned char *) &ufs->fs_id,
+ sizeof(ufs->fs_id),
+ "%08x%08x",
+ be32_to_cpu(ufs->fs_id[0]),
+ be32_to_cpu(ufs->fs_id[1]));
+ else
+ blkid_probe_sprintf_uuid(pr,
+ (unsigned char *) &ufs->fs_id,
+ sizeof(ufs->fs_id),
+ "%08x%08x",
+ le32_to_cpu(ufs->fs_id[0]),
+ le32_to_cpu(ufs->fs_id[1]));
+ }
+
+ if (blkid_probe_set_magic(pr,
+ (offsets[i] * 1024) +
+ offsetof(struct ufs_super_block, fs_magic),
+ sizeof(ufs->fs_magic),
+ (unsigned char *) &ufs->fs_magic))
+ return -1;
+
+ return 0;
+}
+
+/*
+ * According to libvolume_id the UFS superblock could be on four positions.
+ * The original libblkid has checked one position (.kboff=8) only.
+ *
+ * We know four UFS magic strings and UFS could be both little-endian and
+ * big-endian. ... so we have:
+ *
+ * 4 position * 4 string * 2 version = 32 magic strings
+ *
+ * It seems simpler to check for these string in probing function that hardcode
+ * all in the .magic array.
+ */
+const struct blkid_idinfo ufs_idinfo =
+{
+ .name = "ufs",
+ .usage = BLKID_USAGE_FILESYSTEM,
+ .probefunc = probe_ufs,
+ .magics = BLKID_NONE_MAGIC
+};
+