diff options
Diffstat (limited to 'usr.sbin/makefs/ffs/ffs_balloc.c')
| -rw-r--r-- | usr.sbin/makefs/ffs/ffs_balloc.c | 578 |
1 files changed, 0 insertions, 578 deletions
diff --git a/usr.sbin/makefs/ffs/ffs_balloc.c b/usr.sbin/makefs/ffs/ffs_balloc.c deleted file mode 100644 index 0a048ad..0000000 --- a/usr.sbin/makefs/ffs/ffs_balloc.c +++ /dev/null @@ -1,578 +0,0 @@ -/* $NetBSD: ffs_balloc.c,v 1.13 2004/06/20 22:20:18 jmc Exp $ */ -/* From NetBSD: ffs_balloc.c,v 1.25 2001/08/08 08:36:36 lukem Exp */ - -/* - * Copyright (c) 1982, 1986, 1989, 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. 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_balloc.c 8.8 (Berkeley) 6/16/95 - */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include <sys/param.h> -#include <sys/time.h> - -#include <assert.h> -#include <errno.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#include "makefs.h" - -#include <ufs/ufs/dinode.h> -#include <ufs/ffs/fs.h> - -#include "ffs/ufs_bswap.h" -#include "ffs/buf.h" -#include "ffs/ufs_inode.h" -#include "ffs/ffs_extern.h" - -static int ffs_balloc_ufs1(struct inode *, off_t, int, struct buf **); -static int ffs_balloc_ufs2(struct inode *, off_t, int, struct buf **); - -/* - * Balloc defines the structure of file system storage - * by allocating the physical blocks on a device given - * the inode and the logical block number in a file. - * - * Assume: flags == B_SYNC | B_CLRBUF - */ - -int -ffs_balloc(struct inode *ip, off_t offset, int bufsize, struct buf **bpp) -{ - if (ip->i_fs->fs_magic == FS_UFS2_MAGIC) - return ffs_balloc_ufs2(ip, offset, bufsize, bpp); - else - return ffs_balloc_ufs1(ip, offset, bufsize, bpp); -} - -static int -ffs_balloc_ufs1(struct inode *ip, off_t offset, int bufsize, struct buf **bpp) -{ - daddr_t lbn, lastlbn; - int size; - int32_t nb; - struct buf *bp, *nbp; - struct fs *fs = ip->i_fs; - struct indir indirs[NIADDR + 2]; - daddr_t newb, pref; - int32_t *bap; - int osize, nsize, num, i, error; - int32_t *allocblk, allociblk[NIADDR + 1]; - int32_t *allocib; - const int needswap = UFS_FSNEEDSWAP(fs); - - lbn = lblkno(fs, offset); - size = blkoff(fs, offset) + bufsize; - if (bpp != NULL) { - *bpp = NULL; - } - - assert(size <= fs->fs_bsize); - if (lbn < 0) - return (EFBIG); - - /* - * If the next write will extend the file into a new block, - * and the file is currently composed of a fragment - * this fragment has to be extended to be a full block. - */ - - lastlbn = lblkno(fs, ip->i_ffs1_size); - if (lastlbn < NDADDR && lastlbn < lbn) { - nb = lastlbn; - osize = blksize(fs, ip, nb); - if (osize < fs->fs_bsize && osize > 0) { - warnx("need to ffs_realloccg; not supported!"); - abort(); - } - } - - /* - * The first NDADDR blocks are direct blocks - */ - - if (lbn < NDADDR) { - nb = ufs_rw32(ip->i_ffs1_db[lbn], needswap); - if (nb != 0 && ip->i_ffs1_size >= lblktosize(fs, lbn + 1)) { - - /* - * The block is an already-allocated direct block - * and the file already extends past this block, - * thus this must be a whole block. - * Just read the block (if requested). - */ - - if (bpp != NULL) { - error = bread(ip->i_fd, ip->i_fs, lbn, - fs->fs_bsize, bpp); - if (error) { - brelse(*bpp); - return (error); - } - } - return (0); - } - if (nb != 0) { - - /* - * Consider need to reallocate a fragment. - */ - - osize = fragroundup(fs, blkoff(fs, ip->i_ffs1_size)); - nsize = fragroundup(fs, size); - if (nsize <= osize) { - - /* - * The existing block is already - * at least as big as we want. - * Just read the block (if requested). - */ - - if (bpp != NULL) { - error = bread(ip->i_fd, ip->i_fs, lbn, - osize, bpp); - if (error) { - brelse(*bpp); - return (error); - } - } - return 0; - } else { - warnx("need to ffs_realloccg; not supported!"); - abort(); - } - } else { - - /* - * the block was not previously allocated, - * allocate a new block or fragment. - */ - - if (ip->i_ffs1_size < lblktosize(fs, lbn + 1)) - nsize = fragroundup(fs, size); - else - nsize = fs->fs_bsize; - error = ffs_alloc(ip, lbn, - ffs_blkpref_ufs1(ip, lbn, (int)lbn, - &ip->i_ffs1_db[0]), - nsize, &newb); - if (error) - return (error); - if (bpp != NULL) { - bp = getblk(ip->i_fd, ip->i_fs, lbn, nsize); - bp->b_blkno = fsbtodb(fs, newb); - clrbuf(bp); - *bpp = bp; - } - } - ip->i_ffs1_db[lbn] = ufs_rw32((int32_t)newb, needswap); - return (0); - } - - /* - * Determine the number of levels of indirection. - */ - - pref = 0; - if ((error = ufs_getlbns(ip, lbn, indirs, &num)) != 0) - return (error); - - if (num < 1) { - warnx("ffs_balloc: ufs_getlbns returned indirect block"); - abort(); - } - - /* - * Fetch the first indirect block allocating if necessary. - */ - - --num; - nb = ufs_rw32(ip->i_ffs1_ib[indirs[0].in_off], needswap); - allocib = NULL; - allocblk = allociblk; - if (nb == 0) { - pref = ffs_blkpref_ufs1(ip, lbn, 0, (int32_t *)0); - error = ffs_alloc(ip, lbn, pref, (int)fs->fs_bsize, &newb); - if (error) - return error; - nb = newb; - *allocblk++ = nb; - bp = getblk(ip->i_fd, ip->i_fs, indirs[1].in_lbn, fs->fs_bsize); - bp->b_blkno = fsbtodb(fs, nb); - clrbuf(bp); - /* - * Write synchronously so that indirect blocks - * never point at garbage. - */ - if ((error = bwrite(bp)) != 0) - return error; - allocib = &ip->i_ffs1_ib[indirs[0].in_off]; - *allocib = ufs_rw32((int32_t)nb, needswap); - } - - /* - * Fetch through the indirect blocks, allocating as necessary. - */ - - for (i = 1;;) { - error = bread(ip->i_fd, ip->i_fs, indirs[i].in_lbn, - fs->fs_bsize, &bp); - if (error) { - brelse(bp); - return error; - } - bap = (int32_t *)bp->b_data; - nb = ufs_rw32(bap[indirs[i].in_off], needswap); - if (i == num) - break; - i++; - if (nb != 0) { - brelse(bp); - continue; - } - if (pref == 0) - pref = ffs_blkpref_ufs1(ip, lbn, 0, (int32_t *)0); - error = ffs_alloc(ip, lbn, pref, (int)fs->fs_bsize, &newb); - if (error) { - brelse(bp); - return error; - } - nb = newb; - *allocblk++ = nb; - nbp = getblk(ip->i_fd, ip->i_fs, indirs[i].in_lbn, - fs->fs_bsize); - nbp->b_blkno = fsbtodb(fs, nb); - clrbuf(nbp); - /* - * Write synchronously so that indirect blocks - * never point at garbage. - */ - - if ((error = bwrite(nbp)) != 0) { - brelse(bp); - return error; - } - bap[indirs[i - 1].in_off] = ufs_rw32(nb, needswap); - - bwrite(bp); - } - - /* - * Get the data block, allocating if necessary. - */ - - if (nb == 0) { - pref = ffs_blkpref_ufs1(ip, lbn, indirs[num].in_off, &bap[0]); - error = ffs_alloc(ip, lbn, pref, (int)fs->fs_bsize, &newb); - if (error) { - brelse(bp); - return error; - } - nb = newb; - *allocblk++ = nb; - if (bpp != NULL) { - nbp = getblk(ip->i_fd, ip->i_fs, lbn, fs->fs_bsize); - nbp->b_blkno = fsbtodb(fs, nb); - clrbuf(nbp); - *bpp = nbp; - } - bap[indirs[num].in_off] = ufs_rw32(nb, needswap); - - /* - * If required, write synchronously, otherwise use - * delayed write. - */ - bwrite(bp); - return (0); - } - brelse(bp); - if (bpp != NULL) { - error = bread(ip->i_fd, ip->i_fs, lbn, (int)fs->fs_bsize, &nbp); - if (error) { - brelse(nbp); - return error; - } - *bpp = nbp; - } - return (0); -} - -static int -ffs_balloc_ufs2(struct inode *ip, off_t offset, int bufsize, struct buf **bpp) -{ - daddr_t lbn, lastlbn; - int size; - struct buf *bp, *nbp; - struct fs *fs = ip->i_fs; - struct indir indirs[NIADDR + 2]; - daddr_t newb, pref, nb; - int64_t *bap; - int osize, nsize, num, i, error; - int64_t *allocblk, allociblk[NIADDR + 1]; - int64_t *allocib; - const int needswap = UFS_FSNEEDSWAP(fs); - - lbn = lblkno(fs, offset); - size = blkoff(fs, offset) + bufsize; - if (bpp != NULL) { - *bpp = NULL; - } - - assert(size <= fs->fs_bsize); - if (lbn < 0) - return (EFBIG); - - /* - * If the next write will extend the file into a new block, - * and the file is currently composed of a fragment - * this fragment has to be extended to be a full block. - */ - - lastlbn = lblkno(fs, ip->i_ffs2_size); - if (lastlbn < NDADDR && lastlbn < lbn) { - nb = lastlbn; - osize = blksize(fs, ip, nb); - if (osize < fs->fs_bsize && osize > 0) { - warnx("need to ffs_realloccg; not supported!"); - abort(); - } - } - - /* - * The first NDADDR blocks are direct blocks - */ - - if (lbn < NDADDR) { - nb = ufs_rw64(ip->i_ffs2_db[lbn], needswap); - if (nb != 0 && ip->i_ffs2_size >= lblktosize(fs, lbn + 1)) { - - /* - * The block is an already-allocated direct block - * and the file already extends past this block, - * thus this must be a whole block. - * Just read the block (if requested). - */ - - if (bpp != NULL) { - error = bread(ip->i_fd, ip->i_fs, lbn, - fs->fs_bsize, bpp); - if (error) { - brelse(*bpp); - return (error); - } - } - return (0); - } - if (nb != 0) { - - /* - * Consider need to reallocate a fragment. - */ - - osize = fragroundup(fs, blkoff(fs, ip->i_ffs2_size)); - nsize = fragroundup(fs, size); - if (nsize <= osize) { - - /* - * The existing block is already - * at least as big as we want. - * Just read the block (if requested). - */ - - if (bpp != NULL) { - error = bread(ip->i_fd, ip->i_fs, lbn, - osize, bpp); - if (error) { - brelse(*bpp); - return (error); - } - } - return 0; - } else { - warnx("need to ffs_realloccg; not supported!"); - abort(); - } - } else { - - /* - * the block was not previously allocated, - * allocate a new block or fragment. - */ - - if (ip->i_ffs2_size < lblktosize(fs, lbn + 1)) - nsize = fragroundup(fs, size); - else - nsize = fs->fs_bsize; - error = ffs_alloc(ip, lbn, - ffs_blkpref_ufs2(ip, lbn, (int)lbn, - &ip->i_ffs2_db[0]), - nsize, &newb); - if (error) - return (error); - if (bpp != NULL) { - bp = getblk(ip->i_fd, ip->i_fs, lbn, nsize); - bp->b_blkno = fsbtodb(fs, newb); - clrbuf(bp); - *bpp = bp; - } - } - ip->i_ffs2_db[lbn] = ufs_rw64(newb, needswap); - return (0); - } - - /* - * Determine the number of levels of indirection. - */ - - pref = 0; - if ((error = ufs_getlbns(ip, lbn, indirs, &num)) != 0) - return (error); - - if (num < 1) { - warnx("ffs_balloc: ufs_getlbns returned indirect block"); - abort(); - } - - /* - * Fetch the first indirect block allocating if necessary. - */ - - --num; - nb = ufs_rw64(ip->i_ffs2_ib[indirs[0].in_off], needswap); - allocib = NULL; - allocblk = allociblk; - if (nb == 0) { - pref = ffs_blkpref_ufs2(ip, lbn, 0, (int64_t *)0); - error = ffs_alloc(ip, lbn, pref, (int)fs->fs_bsize, &newb); - if (error) - return error; - nb = newb; - *allocblk++ = nb; - bp = getblk(ip->i_fd, ip->i_fs, indirs[1].in_lbn, fs->fs_bsize); - bp->b_blkno = fsbtodb(fs, nb); - clrbuf(bp); - /* - * Write synchronously so that indirect blocks - * never point at garbage. - */ - if ((error = bwrite(bp)) != 0) - return error; - allocib = &ip->i_ffs2_ib[indirs[0].in_off]; - *allocib = ufs_rw64(nb, needswap); - } - - /* - * Fetch through the indirect blocks, allocating as necessary. - */ - - for (i = 1;;) { - error = bread(ip->i_fd, ip->i_fs, indirs[i].in_lbn, - fs->fs_bsize, &bp); - if (error) { - brelse(bp); - return error; - } - bap = (int64_t *)bp->b_data; - nb = ufs_rw64(bap[indirs[i].in_off], needswap); - if (i == num) - break; - i++; - if (nb != 0) { - brelse(bp); - continue; - } - if (pref == 0) - pref = ffs_blkpref_ufs2(ip, lbn, 0, (int64_t *)0); - error = ffs_alloc(ip, lbn, pref, (int)fs->fs_bsize, &newb); - if (error) { - brelse(bp); - return error; - } - nb = newb; - *allocblk++ = nb; - nbp = getblk(ip->i_fd, ip->i_fs, indirs[i].in_lbn, - fs->fs_bsize); - nbp->b_blkno = fsbtodb(fs, nb); - clrbuf(nbp); - /* - * Write synchronously so that indirect blocks - * never point at garbage. - */ - - if ((error = bwrite(nbp)) != 0) { - brelse(bp); - return error; - } - bap[indirs[i - 1].in_off] = ufs_rw64(nb, needswap); - - bwrite(bp); - } - - /* - * Get the data block, allocating if necessary. - */ - - if (nb == 0) { - pref = ffs_blkpref_ufs2(ip, lbn, indirs[num].in_off, &bap[0]); - error = ffs_alloc(ip, lbn, pref, (int)fs->fs_bsize, &newb); - if (error) { - brelse(bp); - return error; - } - nb = newb; - *allocblk++ = nb; - if (bpp != NULL) { - nbp = getblk(ip->i_fd, ip->i_fs, lbn, fs->fs_bsize); - nbp->b_blkno = fsbtodb(fs, nb); - clrbuf(nbp); - *bpp = nbp; - } - bap[indirs[num].in_off] = ufs_rw64(nb, needswap); - - /* - * If required, write synchronously, otherwise use - * delayed write. - */ - bwrite(bp); - return (0); - } - brelse(bp); - if (bpp != NULL) { - error = bread(ip->i_fd, ip->i_fs, lbn, (int)fs->fs_bsize, &nbp); - if (error) { - brelse(nbp); - return error; - } - *bpp = nbp; - } - return (0); -} |
