119 lines
3.8 KiB
C
119 lines
3.8 KiB
C
/*
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* Copyright (c) 1999, 2000
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* Adrian Chadd <adrian@FreeBSD.org>
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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* @(#)ffs_vnops.c 8.15 (Berkeley) 5/14/95
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/resourcevar.h>
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#include <sys/signalvar.h>
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#include <sys/kernel.h>
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#include <sys/stat.h>
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#include <sys/bio.h>
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#include <sys/buf.h>
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#include <sys/mount.h>
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#include <sys/vnode.h>
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#include <sys/conf.h>
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#include <sys/namei.h>
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#include <sys/malloc.h>
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#include <sys/dirent.h>
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#include <machine/limits.h>
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#include <vm/vm.h>
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#include <vm/vm_page.h>
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#include <vm/vm_object.h>
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#include <vm/vm_extern.h>
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#include <ufs/ufs/dir.h>
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#include <ufs/ufs/quota.h>
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#include <ufs/ufs/inode.h>
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#include <ufs/ufs/ufs_extern.h>
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#include <ufs/ffs/fs.h>
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#include <ufs/ffs/ffs_extern.h>
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#include <ufs/ifs/ifs_extern.h>
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/*
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* Check whether the given inode number is free.
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*
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* This routine is a chunk of ffs_nodealloccg - we aren't
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* allocating here. We also check whether there will be
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* any other inodes in the cylinder group, and if not,
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* we return -1.
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*/
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int
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ifs_isinodealloc(struct inode *ip, ufs_daddr_t ino)
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{
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struct fs *fs;
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struct cg *cgp;
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struct buf *bp;
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int error;
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int cg;
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int retval = 0;
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/* Grab the filesystem info and cylinder group */
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fs = ip->i_fs;
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cg = ino_to_cg(fs, ino);
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/* Read in the cylinder group inode allocation bitmap .. */
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error = bread(ip->i_devvp, fsbtodb(fs, cgtod(fs, cg)),
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(int)fs->fs_cgsize, NOCRED, &bp);
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if (error) {
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retval = IFS_INODE_NOALLOC;
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goto end;
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}
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cgp = (struct cg *)bp->b_data;
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if (!cg_chkmagic(cgp)) {
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retval = IFS_INODE_NOALLOC;
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goto end;
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}
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ino %= fs->fs_ipg;
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/*
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* Check whether we have any inodes in this cg, or whether the
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* inode is allocated
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*/
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if (!isclr(cg_inosused(cgp), ino))
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retval = IFS_INODE_ISALLOC; /* it is allocated */
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else if (cgp->cg_niblk == cgp->cg_cs.cs_nifree)
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retval = IFS_INODE_EMPTYCG; /* empty cg */
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else
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retval = IFS_INODE_NOALLOC; /* its not allocated */
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end:
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/* Close the buffer and return */
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brelse(bp);
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return (retval);
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}
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