1099 lines
26 KiB
C
1099 lines
26 KiB
C
/* $NetBSD: ffs_balloc.c,v 1.36 2004/08/14 01:30:56 mycroft Exp $ */
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/*
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* Copyright (c) 2002 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by Marshall
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* Kirk McKusick and Network Associates Laboratories, the Security
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* Research Division of Network Associates, Inc. under DARPA/SPAWAR
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* contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS
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* research program
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*
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* Copyright (c) 1982, 1986, 1989, 1993
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* The Regents of the University of California. 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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* 3. 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_balloc.c 8.8 (Berkeley) 6/16/95
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ffs_balloc.c,v 1.36 2004/08/14 01:30:56 mycroft Exp $");
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#if defined(_KERNEL_OPT)
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#include "opt_quota.h"
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#endif
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/buf.h>
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#include <sys/file.h>
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#include <sys/mount.h>
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include <ufs/ufs/quota.h>
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#include <ufs/ufs/ufsmount.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/ufs/ufs_bswap.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 <uvm/uvm.h>
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static int ffs_balloc_ufs1(void *);
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static int ffs_balloc_ufs2(void *);
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/*
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* Balloc defines the structure of file system storage
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* by allocating the physical blocks on a device given
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* the inode and the logical block number in a file.
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*/
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int
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ffs_balloc(v)
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void *v;
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{
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struct vop_balloc_args *ap = v;
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if (VTOI(ap->a_vp)->i_fs->fs_magic == FS_UFS2_MAGIC)
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return ffs_balloc_ufs2(v);
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else
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return ffs_balloc_ufs1(v);
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}
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static int
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ffs_balloc_ufs1(v)
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void *v;
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{
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struct vop_balloc_args /* {
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struct vnode *a_vp;
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off_t a_startoffset;
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int a_size;
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struct ucred *a_cred;
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int a_flags;
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struct buf **a_bpp;
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} */ *ap = v;
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daddr_t lbn, lastlbn;
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int size;
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struct ucred *cred;
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int flags;
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int32_t nb;
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struct buf *bp, *nbp;
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struct vnode *vp = ap->a_vp;
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struct inode *ip = VTOI(vp);
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struct fs *fs = ip->i_fs;
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struct indir indirs[NIADDR + 2];
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daddr_t newb, pref;
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int32_t *bap; /* XXX ondisk32 */
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int deallocated, osize, nsize, num, i, error;
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int32_t *blkp, *allocblk, allociblk[NIADDR + 1];
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int32_t *allocib;
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int unwindidx = -1;
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struct buf **bpp = ap->a_bpp;
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#ifdef FFS_EI
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const int needswap = UFS_FSNEEDSWAP(fs);
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#endif
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UVMHIST_FUNC("ffs_balloc"); UVMHIST_CALLED(ubchist);
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lbn = lblkno(fs, ap->a_startoffset);
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size = blkoff(fs, ap->a_startoffset) + ap->a_size;
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if (size > fs->fs_bsize)
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panic("ffs_balloc: blk too big");
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if (bpp != NULL) {
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*bpp = NULL;
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}
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UVMHIST_LOG(ubchist, "vp %p lbn 0x%x size 0x%x", vp, lbn, size,0);
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KASSERT(size <= fs->fs_bsize);
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if (lbn < 0)
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return (EFBIG);
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cred = ap->a_cred;
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flags = ap->a_flags;
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/*
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* If the next write will extend the file into a new block,
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* and the file is currently composed of a fragment
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* this fragment has to be extended to be a full block.
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*/
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lastlbn = lblkno(fs, ip->i_size);
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if (lastlbn < NDADDR && lastlbn < lbn) {
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nb = lastlbn;
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osize = blksize(fs, ip, nb);
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if (osize < fs->fs_bsize && osize > 0) {
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error = ffs_realloccg(ip, nb,
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ffs_blkpref_ufs1(ip, lastlbn, nb,
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&ip->i_ffs1_db[0]),
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osize, (int)fs->fs_bsize, cred, bpp, &newb);
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if (error)
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return (error);
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if (DOINGSOFTDEP(vp))
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softdep_setup_allocdirect(ip, nb, newb,
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ufs_rw32(ip->i_ffs1_db[nb], needswap),
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fs->fs_bsize, osize, bpp ? *bpp : NULL);
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ip->i_size = lblktosize(fs, nb + 1);
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ip->i_ffs1_size = ip->i_size;
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uvm_vnp_setsize(vp, ip->i_ffs1_size);
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ip->i_ffs1_db[nb] = ufs_rw32((int32_t)newb, needswap);
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ip->i_flag |= IN_CHANGE | IN_UPDATE;
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if (bpp) {
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if (flags & B_SYNC)
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bwrite(*bpp);
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else
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bawrite(*bpp);
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}
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}
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}
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/*
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* The first NDADDR blocks are direct blocks
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*/
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if (lbn < NDADDR) {
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nb = ufs_rw32(ip->i_ffs1_db[lbn], needswap);
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if (nb != 0 && ip->i_size >= lblktosize(fs, lbn + 1)) {
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/*
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* The block is an already-allocated direct block
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* and the file already extends past this block,
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* thus this must be a whole block.
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* Just read the block (if requested).
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*/
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if (bpp != NULL) {
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error = bread(vp, lbn, fs->fs_bsize, NOCRED,
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bpp);
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if (error) {
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brelse(*bpp);
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return (error);
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}
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}
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return (0);
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}
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if (nb != 0) {
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/*
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* Consider need to reallocate a fragment.
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*/
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osize = fragroundup(fs, blkoff(fs, ip->i_size));
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nsize = fragroundup(fs, size);
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if (nsize <= osize) {
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/*
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* The existing block is already
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* at least as big as we want.
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* Just read the block (if requested).
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*/
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if (bpp != NULL) {
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error = bread(vp, lbn, osize, NOCRED,
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bpp);
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if (error) {
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brelse(*bpp);
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return (error);
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}
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}
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return 0;
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} else {
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/*
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* The existing block is smaller than we want,
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* grow it.
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*/
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error = ffs_realloccg(ip, lbn,
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ffs_blkpref_ufs1(ip, lbn, (int)lbn,
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&ip->i_ffs1_db[0]), osize, nsize, cred,
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bpp, &newb);
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if (error)
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return (error);
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if (DOINGSOFTDEP(vp))
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softdep_setup_allocdirect(ip, lbn,
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newb, nb, nsize, osize,
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bpp ? *bpp : NULL);
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}
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} else {
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/*
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* the block was not previously allocated,
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* allocate a new block or fragment.
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*/
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if (ip->i_size < lblktosize(fs, lbn + 1))
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nsize = fragroundup(fs, size);
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else
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nsize = fs->fs_bsize;
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error = ffs_alloc(ip, lbn,
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ffs_blkpref_ufs1(ip, lbn, (int)lbn,
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&ip->i_ffs1_db[0]),
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nsize, cred, &newb);
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if (error)
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return (error);
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if (bpp != NULL) {
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bp = getblk(vp, lbn, nsize, 0, 0);
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bp->b_blkno = fsbtodb(fs, newb);
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if (flags & B_CLRBUF)
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clrbuf(bp);
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*bpp = bp;
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}
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if (DOINGSOFTDEP(vp)) {
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softdep_setup_allocdirect(ip, lbn, newb, 0,
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nsize, 0, bpp ? *bpp : NULL);
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}
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}
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ip->i_ffs1_db[lbn] = ufs_rw32((int32_t)newb, needswap);
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ip->i_flag |= IN_CHANGE | IN_UPDATE;
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return (0);
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}
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/*
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* Determine the number of levels of indirection.
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*/
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pref = 0;
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if ((error = ufs_getlbns(vp, lbn, indirs, &num)) != 0)
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return (error);
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/*
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* Fetch the first indirect block allocating if necessary.
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*/
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--num;
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nb = ufs_rw32(ip->i_ffs1_ib[indirs[0].in_off], needswap);
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allocib = NULL;
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allocblk = allociblk;
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if (nb == 0) {
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pref = ffs_blkpref_ufs1(ip, lbn, 0, (int32_t *)0);
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error = ffs_alloc(ip, lbn, pref, (int)fs->fs_bsize, cred,
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&newb);
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if (error)
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goto fail;
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nb = newb;
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*allocblk++ = nb;
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bp = getblk(vp, indirs[1].in_lbn, fs->fs_bsize, 0, 0);
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bp->b_blkno = fsbtodb(fs, nb);
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clrbuf(bp);
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if (DOINGSOFTDEP(vp)) {
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softdep_setup_allocdirect(ip, NDADDR + indirs[0].in_off,
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newb, 0, fs->fs_bsize, 0, bp);
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bdwrite(bp);
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} else {
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/*
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* Write synchronously so that indirect blocks
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* never point at garbage.
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*/
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if ((error = bwrite(bp)) != 0)
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goto fail;
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}
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unwindidx = 0;
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allocib = &ip->i_ffs1_ib[indirs[0].in_off];
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*allocib = ufs_rw32(nb, needswap);
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ip->i_flag |= IN_CHANGE | IN_UPDATE;
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}
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/*
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* Fetch through the indirect blocks, allocating as necessary.
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*/
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for (i = 1;;) {
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error = bread(vp,
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indirs[i].in_lbn, (int)fs->fs_bsize, NOCRED, &bp);
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if (error) {
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brelse(bp);
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goto fail;
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}
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bap = (int32_t *)bp->b_data; /* XXX ondisk32 */
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nb = ufs_rw32(bap[indirs[i].in_off], needswap);
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if (i == num)
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break;
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i++;
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if (nb != 0) {
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brelse(bp);
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continue;
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}
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if (pref == 0)
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pref = ffs_blkpref_ufs1(ip, lbn, 0, (int32_t *)0);
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error = ffs_alloc(ip, lbn, pref, (int)fs->fs_bsize, cred,
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&newb);
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if (error) {
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brelse(bp);
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goto fail;
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}
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nb = newb;
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*allocblk++ = nb;
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nbp = getblk(vp, indirs[i].in_lbn, fs->fs_bsize, 0, 0);
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nbp->b_blkno = fsbtodb(fs, nb);
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clrbuf(nbp);
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if (DOINGSOFTDEP(vp)) {
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softdep_setup_allocindir_meta(nbp, ip, bp,
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indirs[i - 1].in_off, nb);
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bdwrite(nbp);
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} else {
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/*
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* Write synchronously so that indirect blocks
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* never point at garbage.
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*/
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if ((error = bwrite(nbp)) != 0) {
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brelse(bp);
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goto fail;
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}
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}
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if (unwindidx < 0)
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unwindidx = i - 1;
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bap[indirs[i - 1].in_off] = ufs_rw32(nb, needswap);
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/*
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* If required, write synchronously, otherwise use
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* delayed write.
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*/
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|
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if (flags & B_SYNC) {
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bwrite(bp);
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} else {
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bdwrite(bp);
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}
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}
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|
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if (flags & B_METAONLY) {
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*bpp = bp;
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return (0);
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}
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/*
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* Get the data block, allocating if necessary.
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*/
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if (nb == 0) {
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pref = ffs_blkpref_ufs1(ip, lbn, indirs[num].in_off, &bap[0]);
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error = ffs_alloc(ip, lbn, pref, (int)fs->fs_bsize, cred,
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&newb);
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if (error) {
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brelse(bp);
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goto fail;
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}
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nb = newb;
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*allocblk++ = nb;
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if (bpp != NULL) {
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nbp = getblk(vp, lbn, fs->fs_bsize, 0, 0);
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nbp->b_blkno = fsbtodb(fs, nb);
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if (flags & B_CLRBUF)
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clrbuf(nbp);
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*bpp = nbp;
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}
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if (DOINGSOFTDEP(vp))
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softdep_setup_allocindir_page(ip, lbn, bp,
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indirs[num].in_off, nb, 0, bpp ? *bpp : NULL);
|
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bap[indirs[num].in_off] = ufs_rw32(nb, needswap);
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if (allocib == NULL && unwindidx < 0) {
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unwindidx = i - 1;
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}
|
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|
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/*
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* If required, write synchronously, otherwise use
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* delayed write.
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*/
|
|
|
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if (flags & B_SYNC) {
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bwrite(bp);
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} else {
|
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bdwrite(bp);
|
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}
|
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return (0);
|
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}
|
|
brelse(bp);
|
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if (bpp != NULL) {
|
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if (flags & B_CLRBUF) {
|
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error = bread(vp, lbn, (int)fs->fs_bsize, NOCRED, &nbp);
|
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if (error) {
|
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brelse(nbp);
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goto fail;
|
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}
|
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} else {
|
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nbp = getblk(vp, lbn, fs->fs_bsize, 0, 0);
|
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nbp->b_blkno = fsbtodb(fs, nb);
|
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clrbuf(nbp);
|
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}
|
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*bpp = nbp;
|
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}
|
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return (0);
|
|
|
|
fail:
|
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/*
|
|
* If we have failed part way through block allocation, we
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* have to deallocate any indirect blocks that we have allocated.
|
|
*/
|
|
|
|
if (unwindidx >= 0) {
|
|
|
|
/*
|
|
* First write out any buffers we've created to resolve their
|
|
* softdeps. This must be done in reverse order of creation
|
|
* so that we resolve the dependencies in one pass.
|
|
* Write the cylinder group buffers for these buffers too.
|
|
*/
|
|
|
|
for (i = num; i >= unwindidx; i--) {
|
|
if (i == 0) {
|
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break;
|
|
}
|
|
bp = getblk(vp, indirs[i].in_lbn, (int)fs->fs_bsize, 0,
|
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0);
|
|
if (bp->b_flags & B_DELWRI) {
|
|
nb = fsbtodb(fs, cgtod(fs, dtog(fs,
|
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dbtofsb(fs, bp->b_blkno))));
|
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bwrite(bp);
|
|
bp = getblk(ip->i_devvp, nb, (int)fs->fs_cgsize,
|
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0, 0);
|
|
if (bp->b_flags & B_DELWRI) {
|
|
bwrite(bp);
|
|
} else {
|
|
bp->b_flags |= B_INVAL;
|
|
brelse(bp);
|
|
}
|
|
} else {
|
|
bp->b_flags |= B_INVAL;
|
|
brelse(bp);
|
|
}
|
|
}
|
|
if (DOINGSOFTDEP(vp) && unwindidx == 0) {
|
|
ip->i_flag |= IN_CHANGE | IN_UPDATE;
|
|
VOP_UPDATE(vp, NULL, NULL, UPDATE_WAIT);
|
|
}
|
|
|
|
/*
|
|
* Now that any dependencies that we created have been
|
|
* resolved, we can undo the partial allocation.
|
|
*/
|
|
|
|
if (unwindidx == 0) {
|
|
*allocib = 0;
|
|
ip->i_flag |= IN_CHANGE | IN_UPDATE;
|
|
if (DOINGSOFTDEP(vp))
|
|
VOP_UPDATE(vp, NULL, NULL, UPDATE_WAIT);
|
|
} else {
|
|
int r;
|
|
|
|
r = bread(vp, indirs[unwindidx].in_lbn,
|
|
(int)fs->fs_bsize, NOCRED, &bp);
|
|
if (r) {
|
|
panic("Could not unwind indirect block, error %d", r);
|
|
brelse(bp);
|
|
} else {
|
|
bap = (int32_t *)bp->b_data; /* XXX ondisk32 */
|
|
bap[indirs[unwindidx].in_off] = 0;
|
|
bwrite(bp);
|
|
}
|
|
}
|
|
for (i = unwindidx + 1; i <= num; i++) {
|
|
bp = getblk(vp, indirs[i].in_lbn, (int)fs->fs_bsize, 0,
|
|
0);
|
|
bp->b_flags |= B_INVAL;
|
|
brelse(bp);
|
|
}
|
|
}
|
|
for (deallocated = 0, blkp = allociblk; blkp < allocblk; blkp++) {
|
|
ffs_blkfree(fs, ip->i_devvp, *blkp, fs->fs_bsize, ip->i_number);
|
|
deallocated += fs->fs_bsize;
|
|
}
|
|
if (deallocated) {
|
|
#ifdef QUOTA
|
|
/*
|
|
* Restore user's disk quota because allocation failed.
|
|
*/
|
|
(void)chkdq(ip, -btodb(deallocated), cred, FORCE);
|
|
#endif
|
|
ip->i_ffs1_blocks -= btodb(deallocated);
|
|
ip->i_flag |= IN_CHANGE | IN_UPDATE;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
ffs_balloc_ufs2(v)
|
|
void *v;
|
|
{
|
|
struct vop_balloc_args /* {
|
|
struct vnode *a_vp;
|
|
off_t a_startoffset;
|
|
int a_size;
|
|
struct ucred *a_cred;
|
|
int a_flags;
|
|
struct buf **a_bpp;
|
|
} */ *ap = v;
|
|
daddr_t lbn, lastlbn;
|
|
int size;
|
|
struct ucred *cred;
|
|
int flags;
|
|
struct buf *bp, *nbp;
|
|
struct vnode *vp = ap->a_vp;
|
|
struct inode *ip = VTOI(vp);
|
|
struct fs *fs = ip->i_fs;
|
|
struct indir indirs[NIADDR + 2];
|
|
daddr_t newb, pref, nb;
|
|
int64_t *bap;
|
|
int deallocated, osize, nsize, num, i, error;
|
|
daddr_t *blkp, *allocblk, allociblk[NIADDR + 1];
|
|
int64_t *allocib;
|
|
int unwindidx = -1;
|
|
struct buf **bpp = ap->a_bpp;
|
|
#ifdef FFS_EI
|
|
const int needswap = UFS_FSNEEDSWAP(fs);
|
|
#endif
|
|
UVMHIST_FUNC("ffs_balloc"); UVMHIST_CALLED(ubchist);
|
|
|
|
lbn = lblkno(fs, ap->a_startoffset);
|
|
size = blkoff(fs, ap->a_startoffset) + ap->a_size;
|
|
if (size > fs->fs_bsize)
|
|
panic("ffs_balloc: blk too big");
|
|
if (bpp != NULL) {
|
|
*bpp = NULL;
|
|
}
|
|
UVMHIST_LOG(ubchist, "vp %p lbn 0x%x size 0x%x", vp, lbn, size,0);
|
|
|
|
KASSERT(size <= fs->fs_bsize);
|
|
if (lbn < 0)
|
|
return (EFBIG);
|
|
cred = ap->a_cred;
|
|
flags = ap->a_flags;
|
|
|
|
#ifdef notyet
|
|
/*
|
|
* Check for allocating external data.
|
|
*/
|
|
if (flags & IO_EXT) {
|
|
if (lbn >= NXADDR)
|
|
return (EFBIG);
|
|
/*
|
|
* If the next write will extend the data into a new block,
|
|
* and the data is currently composed of a fragment
|
|
* this fragment has to be extended to be a full block.
|
|
*/
|
|
lastlbn = lblkno(fs, dp->di_extsize);
|
|
if (lastlbn < lbn) {
|
|
nb = lastlbn;
|
|
osize = sblksize(fs, dp->di_extsize, nb);
|
|
if (osize < fs->fs_bsize && osize > 0) {
|
|
error = ffs_realloccg(ip, -1 - nb,
|
|
dp->di_extb[nb],
|
|
ffs_blkpref_ufs2(ip, lastlbn, (int)nb,
|
|
&dp->di_extb[0]), osize,
|
|
(int)fs->fs_bsize, cred, &bp);
|
|
if (error)
|
|
return (error);
|
|
if (DOINGSOFTDEP(vp))
|
|
softdep_setup_allocext(ip, nb,
|
|
dbtofsb(fs, bp->b_blkno),
|
|
dp->di_extb[nb],
|
|
fs->fs_bsize, osize, bp);
|
|
dp->di_extsize = smalllblktosize(fs, nb + 1);
|
|
dp->di_extb[nb] = dbtofsb(fs, bp->b_blkno);
|
|
bp->b_xflags |= BX_ALTDATA;
|
|
ip->i_flag |= IN_CHANGE | IN_UPDATE;
|
|
if (flags & IO_SYNC)
|
|
bwrite(bp);
|
|
else
|
|
bawrite(bp);
|
|
}
|
|
}
|
|
/*
|
|
* All blocks are direct blocks
|
|
*/
|
|
if (flags & BA_METAONLY)
|
|
panic("ffs_balloc_ufs2: BA_METAONLY for ext block");
|
|
nb = dp->di_extb[lbn];
|
|
if (nb != 0 && dp->di_extsize >= smalllblktosize(fs, lbn + 1)) {
|
|
error = bread(vp, -1 - lbn, fs->fs_bsize, NOCRED, &bp);
|
|
if (error) {
|
|
brelse(bp);
|
|
return (error);
|
|
}
|
|
bp->b_blkno = fsbtodb(fs, nb);
|
|
bp->b_xflags |= BX_ALTDATA;
|
|
*bpp = bp;
|
|
return (0);
|
|
}
|
|
if (nb != 0) {
|
|
/*
|
|
* Consider need to reallocate a fragment.
|
|
*/
|
|
osize = fragroundup(fs, blkoff(fs, dp->di_extsize));
|
|
nsize = fragroundup(fs, size);
|
|
if (nsize <= osize) {
|
|
error = bread(vp, -1 - lbn, osize, NOCRED, &bp);
|
|
if (error) {
|
|
brelse(bp);
|
|
return (error);
|
|
}
|
|
bp->b_blkno = fsbtodb(fs, nb);
|
|
bp->b_xflags |= BX_ALTDATA;
|
|
} else {
|
|
error = ffs_realloccg(ip, -1 - lbn,
|
|
dp->di_extb[lbn],
|
|
ffs_blkpref_ufs2(ip, lbn, (int)lbn,
|
|
&dp->di_extb[0]), osize, nsize, cred, &bp);
|
|
if (error)
|
|
return (error);
|
|
bp->b_xflags |= BX_ALTDATA;
|
|
if (DOINGSOFTDEP(vp))
|
|
softdep_setup_allocext(ip, lbn,
|
|
dbtofsb(fs, bp->b_blkno), nb,
|
|
nsize, osize, bp);
|
|
}
|
|
} else {
|
|
if (dp->di_extsize < smalllblktosize(fs, lbn + 1))
|
|
nsize = fragroundup(fs, size);
|
|
else
|
|
nsize = fs->fs_bsize;
|
|
error = ffs_alloc(ip, lbn,
|
|
ffs_blkpref_ufs2(ip, lbn, (int)lbn, &dp->di_extb[0]),
|
|
nsize, cred, &newb);
|
|
if (error)
|
|
return (error);
|
|
bp = getblk(vp, -1 - lbn, nsize, 0, 0);
|
|
bp->b_blkno = fsbtodb(fs, newb);
|
|
bp->b_xflags |= BX_ALTDATA;
|
|
if (flags & BA_CLRBUF)
|
|
vfs_bio_clrbuf(bp);
|
|
if (DOINGSOFTDEP(vp))
|
|
softdep_setup_allocext(ip, lbn, newb, 0,
|
|
nsize, 0, bp);
|
|
}
|
|
dp->di_extb[lbn] = dbtofsb(fs, bp->b_blkno);
|
|
ip->i_flag |= IN_CHANGE | IN_UPDATE;
|
|
*bpp = bp;
|
|
return (0);
|
|
}
|
|
#endif
|
|
/*
|
|
* 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_size);
|
|
if (lastlbn < NDADDR && lastlbn < lbn) {
|
|
nb = lastlbn;
|
|
osize = blksize(fs, ip, nb);
|
|
if (osize < fs->fs_bsize && osize > 0) {
|
|
error = ffs_realloccg(ip, nb,
|
|
ffs_blkpref_ufs2(ip, lastlbn, nb,
|
|
&ip->i_ffs2_db[0]),
|
|
osize, (int)fs->fs_bsize, cred, bpp, &newb);
|
|
if (error)
|
|
return (error);
|
|
if (DOINGSOFTDEP(vp))
|
|
softdep_setup_allocdirect(ip, nb, newb,
|
|
ufs_rw64(ip->i_ffs2_db[nb], needswap),
|
|
fs->fs_bsize, osize, bpp ? *bpp : NULL);
|
|
ip->i_size = lblktosize(fs, nb + 1);
|
|
ip->i_ffs2_size = ip->i_size;
|
|
uvm_vnp_setsize(vp, ip->i_size);
|
|
ip->i_ffs2_db[nb] = ufs_rw64(newb, needswap);
|
|
ip->i_flag |= IN_CHANGE | IN_UPDATE;
|
|
if (bpp) {
|
|
if (flags & B_SYNC)
|
|
bwrite(*bpp);
|
|
else
|
|
bawrite(*bpp);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* The first NDADDR blocks are direct blocks
|
|
*/
|
|
|
|
if (lbn < NDADDR) {
|
|
nb = ufs_rw64(ip->i_ffs2_db[lbn], needswap);
|
|
if (nb != 0 && ip->i_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(vp, lbn, fs->fs_bsize, NOCRED,
|
|
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_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(vp, lbn, osize, NOCRED,
|
|
bpp);
|
|
if (error) {
|
|
brelse(*bpp);
|
|
return (error);
|
|
}
|
|
}
|
|
return 0;
|
|
} else {
|
|
|
|
/*
|
|
* The existing block is smaller than we want,
|
|
* grow it.
|
|
*/
|
|
|
|
error = ffs_realloccg(ip, lbn,
|
|
ffs_blkpref_ufs2(ip, lbn, (int)lbn,
|
|
&ip->i_ffs2_db[0]), osize, nsize, cred,
|
|
bpp, &newb);
|
|
if (error)
|
|
return (error);
|
|
if (DOINGSOFTDEP(vp))
|
|
softdep_setup_allocdirect(ip, lbn,
|
|
newb, nb, nsize, osize,
|
|
bpp ? *bpp : NULL);
|
|
}
|
|
} else {
|
|
|
|
/*
|
|
* the block was not previously allocated,
|
|
* allocate a new block or fragment.
|
|
*/
|
|
|
|
if (ip->i_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, cred, &newb);
|
|
if (error)
|
|
return (error);
|
|
if (bpp != NULL) {
|
|
bp = getblk(vp, lbn, nsize, 0, 0);
|
|
bp->b_blkno = fsbtodb(fs, newb);
|
|
if (flags & B_CLRBUF)
|
|
clrbuf(bp);
|
|
*bpp = bp;
|
|
}
|
|
if (DOINGSOFTDEP(vp)) {
|
|
softdep_setup_allocdirect(ip, lbn, newb, 0,
|
|
nsize, 0, bpp ? *bpp : NULL);
|
|
}
|
|
}
|
|
ip->i_ffs2_db[lbn] = ufs_rw64(newb, needswap);
|
|
ip->i_flag |= IN_CHANGE | IN_UPDATE;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Determine the number of levels of indirection.
|
|
*/
|
|
|
|
pref = 0;
|
|
if ((error = ufs_getlbns(vp, lbn, indirs, &num)) != 0)
|
|
return (error);
|
|
|
|
/*
|
|
* 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, cred,
|
|
&newb);
|
|
if (error)
|
|
goto fail;
|
|
nb = newb;
|
|
*allocblk++ = nb;
|
|
bp = getblk(vp, indirs[1].in_lbn, fs->fs_bsize, 0, 0);
|
|
bp->b_blkno = fsbtodb(fs, nb);
|
|
clrbuf(bp);
|
|
if (DOINGSOFTDEP(vp)) {
|
|
softdep_setup_allocdirect(ip, NDADDR + indirs[0].in_off,
|
|
newb, 0, fs->fs_bsize, 0, bp);
|
|
bdwrite(bp);
|
|
} else {
|
|
|
|
/*
|
|
* Write synchronously so that indirect blocks
|
|
* never point at garbage.
|
|
*/
|
|
|
|
if ((error = bwrite(bp)) != 0)
|
|
goto fail;
|
|
}
|
|
unwindidx = 0;
|
|
allocib = &ip->i_ffs2_ib[indirs[0].in_off];
|
|
*allocib = ufs_rw64(nb, needswap);
|
|
ip->i_flag |= IN_CHANGE | IN_UPDATE;
|
|
}
|
|
|
|
/*
|
|
* Fetch through the indirect blocks, allocating as necessary.
|
|
*/
|
|
|
|
for (i = 1;;) {
|
|
error = bread(vp,
|
|
indirs[i].in_lbn, (int)fs->fs_bsize, NOCRED, &bp);
|
|
if (error) {
|
|
brelse(bp);
|
|
goto fail;
|
|
}
|
|
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, cred,
|
|
&newb);
|
|
if (error) {
|
|
brelse(bp);
|
|
goto fail;
|
|
}
|
|
nb = newb;
|
|
*allocblk++ = nb;
|
|
nbp = getblk(vp, indirs[i].in_lbn, fs->fs_bsize, 0, 0);
|
|
nbp->b_blkno = fsbtodb(fs, nb);
|
|
clrbuf(nbp);
|
|
if (DOINGSOFTDEP(vp)) {
|
|
softdep_setup_allocindir_meta(nbp, ip, bp,
|
|
indirs[i - 1].in_off, nb);
|
|
bdwrite(nbp);
|
|
} else {
|
|
|
|
/*
|
|
* Write synchronously so that indirect blocks
|
|
* never point at garbage.
|
|
*/
|
|
|
|
if ((error = bwrite(nbp)) != 0) {
|
|
brelse(bp);
|
|
goto fail;
|
|
}
|
|
}
|
|
if (unwindidx < 0)
|
|
unwindidx = i - 1;
|
|
bap[indirs[i - 1].in_off] = ufs_rw64(nb, needswap);
|
|
|
|
/*
|
|
* If required, write synchronously, otherwise use
|
|
* delayed write.
|
|
*/
|
|
|
|
if (flags & B_SYNC) {
|
|
bwrite(bp);
|
|
} else {
|
|
bdwrite(bp);
|
|
}
|
|
}
|
|
|
|
if (flags & B_METAONLY) {
|
|
*bpp = bp;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* 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, cred,
|
|
&newb);
|
|
if (error) {
|
|
brelse(bp);
|
|
goto fail;
|
|
}
|
|
nb = newb;
|
|
*allocblk++ = nb;
|
|
if (bpp != NULL) {
|
|
nbp = getblk(vp, lbn, fs->fs_bsize, 0, 0);
|
|
nbp->b_blkno = fsbtodb(fs, nb);
|
|
if (flags & B_CLRBUF)
|
|
clrbuf(nbp);
|
|
*bpp = nbp;
|
|
}
|
|
if (DOINGSOFTDEP(vp))
|
|
softdep_setup_allocindir_page(ip, lbn, bp,
|
|
indirs[num].in_off, nb, 0, bpp ? *bpp : NULL);
|
|
bap[indirs[num].in_off] = ufs_rw64(nb, needswap);
|
|
if (allocib == NULL && unwindidx < 0) {
|
|
unwindidx = i - 1;
|
|
}
|
|
|
|
/*
|
|
* If required, write synchronously, otherwise use
|
|
* delayed write.
|
|
*/
|
|
|
|
if (flags & B_SYNC) {
|
|
bwrite(bp);
|
|
} else {
|
|
bdwrite(bp);
|
|
}
|
|
return (0);
|
|
}
|
|
brelse(bp);
|
|
if (bpp != NULL) {
|
|
if (flags & B_CLRBUF) {
|
|
error = bread(vp, lbn, (int)fs->fs_bsize, NOCRED, &nbp);
|
|
if (error) {
|
|
brelse(nbp);
|
|
goto fail;
|
|
}
|
|
} else {
|
|
nbp = getblk(vp, lbn, fs->fs_bsize, 0, 0);
|
|
nbp->b_blkno = fsbtodb(fs, nb);
|
|
clrbuf(nbp);
|
|
}
|
|
*bpp = nbp;
|
|
}
|
|
return (0);
|
|
|
|
fail:
|
|
/*
|
|
* If we have failed part way through block allocation, we
|
|
* have to deallocate any indirect blocks that we have allocated.
|
|
*/
|
|
|
|
if (unwindidx >= 0) {
|
|
|
|
/*
|
|
* First write out any buffers we've created to resolve their
|
|
* softdeps. This must be done in reverse order of creation
|
|
* so that we resolve the dependencies in one pass.
|
|
* Write the cylinder group buffers for these buffers too.
|
|
*/
|
|
|
|
for (i = num; i >= unwindidx; i--) {
|
|
if (i == 0) {
|
|
break;
|
|
}
|
|
bp = getblk(vp, indirs[i].in_lbn, (int)fs->fs_bsize, 0,
|
|
0);
|
|
if (bp->b_flags & B_DELWRI) {
|
|
nb = fsbtodb(fs, cgtod(fs, dtog(fs,
|
|
dbtofsb(fs, bp->b_blkno))));
|
|
bwrite(bp);
|
|
bp = getblk(ip->i_devvp, nb, (int)fs->fs_cgsize,
|
|
0, 0);
|
|
if (bp->b_flags & B_DELWRI) {
|
|
bwrite(bp);
|
|
} else {
|
|
bp->b_flags |= B_INVAL;
|
|
brelse(bp);
|
|
}
|
|
} else {
|
|
bp->b_flags |= B_INVAL;
|
|
brelse(bp);
|
|
}
|
|
}
|
|
if (DOINGSOFTDEP(vp) && unwindidx == 0) {
|
|
ip->i_flag |= IN_CHANGE | IN_UPDATE;
|
|
VOP_UPDATE(vp, NULL, NULL, UPDATE_WAIT);
|
|
}
|
|
|
|
/*
|
|
* Now that any dependencies that we created have been
|
|
* resolved, we can undo the partial allocation.
|
|
*/
|
|
|
|
if (unwindidx == 0) {
|
|
*allocib = 0;
|
|
ip->i_flag |= IN_CHANGE | IN_UPDATE;
|
|
if (DOINGSOFTDEP(vp))
|
|
VOP_UPDATE(vp, NULL, NULL, UPDATE_WAIT);
|
|
} else {
|
|
int r;
|
|
|
|
r = bread(vp, indirs[unwindidx].in_lbn,
|
|
(int)fs->fs_bsize, NOCRED, &bp);
|
|
if (r) {
|
|
panic("Could not unwind indirect block, error %d", r);
|
|
brelse(bp);
|
|
} else {
|
|
bap = (int64_t *)bp->b_data;
|
|
bap[indirs[unwindidx].in_off] = 0;
|
|
bwrite(bp);
|
|
}
|
|
}
|
|
for (i = unwindidx + 1; i <= num; i++) {
|
|
bp = getblk(vp, indirs[i].in_lbn, (int)fs->fs_bsize, 0,
|
|
0);
|
|
bp->b_flags |= B_INVAL;
|
|
brelse(bp);
|
|
}
|
|
}
|
|
for (deallocated = 0, blkp = allociblk; blkp < allocblk; blkp++) {
|
|
ffs_blkfree(fs, ip->i_devvp, *blkp, fs->fs_bsize, ip->i_number);
|
|
deallocated += fs->fs_bsize;
|
|
}
|
|
if (deallocated) {
|
|
#ifdef QUOTA
|
|
/*
|
|
* Restore user's disk quota because allocation failed.
|
|
*/
|
|
(void)chkdq(ip, -btodb(deallocated), cred, FORCE);
|
|
#endif
|
|
ip->i_ffs2_blocks -= btodb(deallocated);
|
|
ip->i_flag |= IN_CHANGE | IN_UPDATE;
|
|
}
|
|
return (error);
|
|
}
|