138 lines
4.3 KiB
C
138 lines
4.3 KiB
C
/*
|
|
* Copyright (c) 1989, 1991, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* 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.
|
|
*
|
|
* @(#)lfs_balloc.c 8.1 (Berkeley) 6/11/93
|
|
* $Id$
|
|
*/
|
|
#include <sys/param.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/resourcevar.h>
|
|
#include <sys/trace.h>
|
|
|
|
#include <miscfs/specfs/specdev.h>
|
|
|
|
#include <ufs/ufs/quota.h>
|
|
#include <ufs/ufs/inode.h>
|
|
#include <ufs/ufs/ufsmount.h>
|
|
|
|
#include <ufs/lfs/lfs.h>
|
|
#include <ufs/lfs/lfs_extern.h>
|
|
|
|
int
|
|
lfs_balloc(vp, iosize, lbn, bpp)
|
|
struct vnode *vp;
|
|
u_long iosize;
|
|
daddr_t lbn;
|
|
struct buf **bpp;
|
|
{
|
|
struct buf *ibp, *bp;
|
|
struct inode *ip;
|
|
struct lfs *fs;
|
|
struct indir indirs[NIADDR+2];
|
|
daddr_t daddr;
|
|
int bb, error, i, num;
|
|
|
|
ip = VTOI(vp);
|
|
fs = ip->i_lfs;
|
|
|
|
/*
|
|
* Three cases: it's a block beyond the end of file, it's a block in
|
|
* the file that may or may not have been assigned a disk address or
|
|
* we're writing an entire block. Note, if the daddr is unassigned,
|
|
* the block might still have existed in the cache (if it was read
|
|
* or written earlier). If it did, make sure we don't count it as a
|
|
* new block or zero out its contents. If it did not, make sure
|
|
* we allocate any necessary indirect blocks.
|
|
*/
|
|
|
|
*bpp = NULL;
|
|
if (error = ufs_bmaparray(vp, lbn, &daddr, &indirs[0], &num, NULL ))
|
|
return (error);
|
|
|
|
*bpp = bp = getblk(vp, lbn, fs->lfs_bsize, 0, 0);
|
|
bb = VFSTOUFS(vp->v_mount)->um_seqinc;
|
|
if (daddr == UNASSIGNED)
|
|
/* May need to allocate indirect blocks */
|
|
for (i = 1; i < num; ++i)
|
|
if (!indirs[i].in_exists) {
|
|
ibp =
|
|
getblk(vp, indirs[i].in_lbn, fs->lfs_bsize,
|
|
0, 0);
|
|
if (!(ibp->b_flags & (B_DONE | B_DELWRI))) {
|
|
if (!ISSPACE(fs, bb, curproc->p_ucred)){
|
|
ibp->b_flags |= B_INVAL;
|
|
brelse(ibp);
|
|
error = ENOSPC;
|
|
} else {
|
|
ip->i_blocks += bb;
|
|
ip->i_lfs->lfs_bfree -= bb;
|
|
clrbuf(ibp);
|
|
error = VOP_BWRITE(ibp);
|
|
}
|
|
} else
|
|
panic ("Indirect block should not exist");
|
|
}
|
|
if (error) {
|
|
if (bp)
|
|
brelse(bp);
|
|
return(error);
|
|
}
|
|
|
|
|
|
/* Now, we may need to allocate the data block */
|
|
if (!(bp->b_flags & (B_CACHE | B_DONE | B_DELWRI))) {
|
|
if (daddr == UNASSIGNED)
|
|
if (!ISSPACE(fs, bb, curproc->p_ucred)) {
|
|
bp->b_flags |= B_INVAL;
|
|
brelse(bp);
|
|
return(ENOSPC);
|
|
} else {
|
|
ip->i_blocks += bb;
|
|
ip->i_lfs->lfs_bfree -= bb;
|
|
if (iosize != fs->lfs_bsize)
|
|
clrbuf(bp);
|
|
}
|
|
else if (iosize == fs->lfs_bsize)
|
|
bp->b_blkno = daddr; /* Skip the I/O */
|
|
else {
|
|
bp->b_blkno = daddr;
|
|
bp->b_flags |= B_READ;
|
|
VOP_STRATEGY(bp);
|
|
return(biowait(bp));
|
|
}
|
|
}
|
|
return (error);
|
|
}
|