vxfs.c revision b5e694267142042228a6cac99ecad6c4b4ef8759
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync/*
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync * volume_id - reads filesystem label and uuid
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync *
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync *
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync * This program is free software; you can redistribute it and/or modify it
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync * under the terms of the GNU General Public License as published by the
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync * Free Software Foundation version 2 of the License.
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync */
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#ifndef _GNU_SOURCE
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#define _GNU_SOURCE 1
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#endif
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#ifdef HAVE_CONFIG_H
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync# include <config.h>
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#endif
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#include <stdio.h>
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#include <stdlib.h>
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#include <unistd.h>
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#include <string.h>
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#include <errno.h>
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#include <ctype.h>
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#include "libvolume_id.h"
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#include "util.h"
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#define VXFS_SUPER_MAGIC 0xa501FCF5
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsyncstruct vxfs_super {
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync uint32_t vs_magic;
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync int32_t vs_version;
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync} PACKED;
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsyncint volume_id_probe_vxfs(struct volume_id *id, uint64_t off)
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync{
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync struct vxfs_super *vxs;
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync dbg("probing at offset 0x%llx", (unsigned long long) off);
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync vxs = (struct vxfs_super *) volume_id_get_buffer(id, off + 0x200, 0x200);
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync if (vxs == NULL)
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync return -1;
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync if (vxs->vs_magic == cpu_to_le32(VXFS_SUPER_MAGIC)) {
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync snprintf(id->type_version, sizeof(id->type_version)-1, "%u", (unsigned int) vxs->vs_version);
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync id->type = "vxfs";
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync return 0;
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync }
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync return -1;
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync}
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync