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/*
* Copyright (c) 1999, 2000
* Adrian Chadd <adrian@FreeBSD.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)ffs_vnops.c 8.15 (Berkeley) 5/14/95
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/resourcevar.h>
#include <sys/signalvar.h>
#include <sys/kernel.h>
#include <sys/stat.h>
#include <sys/bio.h>
#include <sys/buf.h>
#include <sys/proc.h>
#include <sys/mount.h>
#include <sys/vnode.h>
#include <sys/conf.h>
#include <sys/namei.h>
#include <sys/malloc.h>
#include <sys/dirent.h>
#include <machine/limits.h>
#include <vm/vm.h>
#include <vm/vm_page.h>
#include <vm/vm_object.h>
#include <vm/vm_extern.h>
#include <vm/vm_zone.h>
#include <ufs/ufs/dir.h>
#include <ufs/ufs/quota.h>
#include <ufs/ufs/inode.h>
#include <ufs/ufs/ufs_extern.h>
#include <ufs/ffs/fs.h>
#include <ufs/ffs/ffs_extern.h>
#include <ufs/ifs/ifs_extern.h>
/*
* Check whether the given inode number is free.
*
* This routine is a chunk of ffs_nodealloccg - we aren't
* allocating here. We also check whether there will be
* any other inodes in the cylinder group, and if not,
* we return -1.
*/
int
ifs_isinodealloc(struct inode *ip, ufs_daddr_t ino)
{
struct fs *fs;
struct cg *cgp;
struct buf *bp;
int error;
int cg;
int retval = 0;
/* Grab the filesystem info and cylinder group */
fs = ip->i_fs;
cg = ino_to_cg(fs, ino);
/* Read in the cylinder group inode allocation bitmap .. */
error = bread(ip->i_devvp, fsbtodb(fs, cgtod(fs, cg)),
(int)fs->fs_cgsize, NOCRED, &bp);
if (error) {
retval = IFS_INODE_NOALLOC;
goto end;
}
cgp = (struct cg *)bp->b_data;
if (!cg_chkmagic(cgp)) {
retval = IFS_INODE_NOALLOC;
goto end;
}
ino %= fs->fs_ipg;
/*
* Check whether we have any inodes in this cg, or whether the
* inode is allocated
*/
if (!isclr(cg_inosused(cgp), ino))
retval = IFS_INODE_ISALLOC; /* it is allocated */
else if (cgp->cg_niblk == cgp->cg_cs.cs_nifree)
retval = IFS_INODE_EMPTYCG; /* empty cg */
else
retval = IFS_INODE_NOALLOC; /* its not allocated */
end:
/* Close the buffer and return */
brelse(bp);
return (retval);
}
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