+/*
+ * volume_id - reads filesystem label and uuid
+ *
+ * Copyright (C) 2005 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 "minix.h"
+
+struct minix_super_block
+{
+ __u16 s_ninodes;
+ __u16 s_nzones;
+ __u16 s_imap_blocks;
+ __u16 s_zmap_blocks;
+ __u16 s_firstdatazone;
+ __u16 s_log_zone_size;
+ __u32 s_max_size;
+ __u16 s_magic;
+ __u16 s_state;
+ __u32 s_zones;
+} __attribute__((__packed__));
+
+#define MINIX_SUPERBLOCK_OFFSET 0x400
+
+int volume_id_probe_minix(struct volume_id *id, __u64 off)
+{
+ struct minix_super_block *ms;
+
+ dbg("probing at offset %llu", off);
+
+ ms = (struct minix_super_block *) volume_id_get_buffer(id, off + MINIX_SUPERBLOCK_OFFSET, 0x200);
+ if (ms == NULL)
+ return -1;
+
+ if (le16_to_cpu(ms->s_magic) == 0x137f) {
+ strcpy(id->type_version, "1");
+ goto found;
+ }
+
+ if (le16_to_cpu(ms->s_magic) == 0x1387) {
+ strcpy(id->type_version, "1");
+ goto found;
+ }
+
+ if (le16_to_cpu(ms->s_magic) == 0x2468) {
+ strcpy(id->type_version, "2");
+ goto found;
+ }
+
+ if (le16_to_cpu(ms->s_magic) == 0x2478) {
+ strcpy(id->type_version, "2");
+ goto found;
+ }
+
+ goto exit;
+
+found:
+ volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
+ id->type = "minix";
+ return 0;
+
+exit:
+ return -1;
+}
~ianmdlvl / elogind.git / commitdiff