79 lines
2.3 KiB
C
79 lines
2.3 KiB
C
/*-
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* Copyright (c) 2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/disklabel.h>
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#include <sys/mount.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/ffs/fs.h>
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#include <libufs.h>
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#include <libgeom.h>
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#include <core/geom.h>
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#include <misc/subr.h>
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#include "geom_journal.h"
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static struct fs *
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read_superblock(const char *prov)
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{
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static struct uufsd disk;
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struct fs *fs;
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if (ufs_disk_fillout(&disk, prov) == -1)
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return (NULL);
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fs = &disk.d_fs;
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ufs_disk_close(&disk);
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return (fs);
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}
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int
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g_journal_ufs_exists(const char *prov)
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{
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return (read_superblock(prov) != NULL);
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}
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int
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g_journal_ufs_using_last_sector(const char *prov)
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{
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struct fs *fs;
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off_t psize, fssize;
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fs = read_superblock(prov);
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if (fs == NULL)
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return (0);
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/* Provider size in 512 bytes blocks. */
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psize = g_get_mediasize(prov) / DEV_BSIZE;
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/* File system size in 512 bytes blocks. */
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fssize = fsbtodb(fs, dbtofsb(fs, psize));
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return (psize == fssize);
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}
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