253 lines
6.7 KiB
C
253 lines
6.7 KiB
C
/*
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* Copyright (c) 1991, 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. 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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* @(#)lfs_alloc.c 8.4 (Berkeley) 1/4/94
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* $Id: lfs_alloc.c,v 1.7 1995/03/28 07:58:02 bde Exp $
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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/kernel.h>
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#include <sys/buf.h>
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#include <sys/vnode.h>
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#include <sys/syslog.h>
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#include <sys/mount.h>
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#include <sys/malloc.h>
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#include <vm/vm.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/ufsmount.h>
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#include <ufs/ufs/ufs_extern.h>
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#include <ufs/lfs/lfs.h>
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#include <ufs/lfs/lfs_extern.h>
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extern u_long nextgennumber;
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/* Allocate a new inode. */
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/* ARGSUSED */
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int
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lfs_valloc(ap)
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struct vop_valloc_args /* {
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struct vnode *a_pvp;
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int a_mode;
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struct ucred *a_cred;
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struct vnode **a_vpp;
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} */ *ap;
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{
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struct lfs *fs;
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struct buf *bp;
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struct ifile *ifp;
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struct inode *ip;
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struct vnode *vp;
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daddr_t blkno;
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ino_t new_ino;
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u_long i, max;
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int error;
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/* Get the head of the freelist. */
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fs = VTOI(ap->a_pvp)->i_lfs;
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new_ino = fs->lfs_free;
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#ifdef ALLOCPRINT
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printf("lfs_ialloc: allocate inode %d\n", new_ino);
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#endif
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/*
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* Remove the inode from the free list and write the new start
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* of the free list into the superblock.
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*/
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LFS_IENTRY(ifp, fs, new_ino, bp);
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if (ifp->if_daddr != LFS_UNUSED_DADDR)
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panic("lfs_ialloc: inuse inode on the free list");
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fs->lfs_free = ifp->if_nextfree;
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brelse(bp);
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/* Extend IFILE so that the next lfs_valloc will succeed. */
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if (fs->lfs_free == LFS_UNUSED_INUM) {
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vp = fs->lfs_ivnode;
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ip = VTOI(vp);
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blkno = lblkno(fs, ip->i_size);
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lfs_balloc(vp, fs->lfs_bsize, blkno, &bp);
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ip->i_size += fs->lfs_bsize;
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vnode_pager_setsize(vp, (u_long)ip->i_size);
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i = (blkno - fs->lfs_segtabsz - fs->lfs_cleansz) *
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fs->lfs_ifpb;
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fs->lfs_free = i;
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max = i + fs->lfs_ifpb;
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for (ifp = (struct ifile *)bp->b_data; i < max; ++ifp) {
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ifp->if_version = 1;
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ifp->if_daddr = LFS_UNUSED_DADDR;
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ifp->if_nextfree = ++i;
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}
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ifp--;
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ifp->if_nextfree = LFS_UNUSED_INUM;
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if (error = VOP_BWRITE(bp))
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return (error);
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}
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/* Create a vnode to associate with the inode. */
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if (error = lfs_vcreate(ap->a_pvp->v_mount, new_ino, &vp))
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return (error);
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ip = VTOI(vp);
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/* Zero out the direct and indirect block addresses. */
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bzero(&ip->i_din, sizeof(struct dinode));
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ip->i_din.di_inumber = new_ino;
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/* Set a new generation number for this inode. */
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if (++nextgennumber < (u_long)time.tv_sec)
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nextgennumber = time.tv_sec;
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ip->i_gen = nextgennumber;
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/* Insert into the inode hash table. */
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ufs_ihashins(ip);
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if (error = ufs_vinit(vp->v_mount, lfs_specop_p, LFS_FIFOOPS, &vp)) {
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vput(vp);
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*ap->a_vpp = NULL;
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return (error);
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}
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*ap->a_vpp = vp;
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vp->v_flag |= VDIROP;
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VREF(ip->i_devvp);
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/* Set superblock modified bit and increment file count. */
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fs->lfs_fmod = 1;
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++fs->lfs_nfiles;
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return (0);
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}
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/* Create a new vnode/inode pair and initialize what fields we can. */
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int
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lfs_vcreate(mp, ino, vpp)
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struct mount *mp;
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ino_t ino;
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struct vnode **vpp;
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{
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struct inode *ip;
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struct ufsmount *ump;
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int error, i;
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/* Create the vnode. */
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if (error = getnewvnode(VT_LFS, mp, lfs_vnodeop_p, vpp)) {
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*vpp = NULL;
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return (error);
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}
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/* Get a pointer to the private mount structure. */
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ump = VFSTOUFS(mp);
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/* Initialize the inode. */
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MALLOC(ip, struct inode *, sizeof(struct inode), M_LFSNODE, M_WAITOK);
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(*vpp)->v_data = ip;
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ip->i_vnode = *vpp;
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ip->i_devvp = ump->um_devvp;
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ip->i_flag = IN_MODIFIED;
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ip->i_dev = ump->um_dev;
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ip->i_number = ip->i_din.di_inumber = ino;
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ip->i_din.di_spare[0] = 0xdeadc0de;
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ip->i_din.di_spare[1] = 0xdeadc0de;
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ip->i_lfs = ump->um_lfs;
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#ifdef QUOTA
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for (i = 0; i < MAXQUOTAS; i++)
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ip->i_dquot[i] = NODQUOT;
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#endif
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ip->i_lockf = 0;
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ip->i_diroff = 0;
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ip->i_mode = 0;
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ip->i_size = 0;
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ip->i_blocks = 0;
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++ump->um_lfs->lfs_uinodes;
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return (0);
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}
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/* Free an inode. */
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/* ARGUSED */
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int
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lfs_vfree(ap)
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struct vop_vfree_args /* {
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struct vnode *a_pvp;
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ino_t a_ino;
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int a_mode;
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} */ *ap;
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{
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SEGUSE *sup;
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struct buf *bp;
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struct ifile *ifp;
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struct inode *ip;
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struct lfs *fs;
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daddr_t old_iaddr;
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ino_t ino;
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/* Get the inode number and file system. */
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ip = VTOI(ap->a_pvp);
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fs = ip->i_lfs;
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ino = ip->i_number;
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if (ip->i_flag & IN_MODIFIED) {
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--fs->lfs_uinodes;
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ip->i_flag &=
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~(IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE);
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}
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/*
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* Set the ifile's inode entry to unused, increment its version number
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* and link it into the free chain.
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*/
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LFS_IENTRY(ifp, fs, ino, bp);
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old_iaddr = ifp->if_daddr;
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ifp->if_daddr = LFS_UNUSED_DADDR;
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++ifp->if_version;
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ifp->if_nextfree = fs->lfs_free;
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fs->lfs_free = ino;
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(void) VOP_BWRITE(bp);
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if (old_iaddr != LFS_UNUSED_DADDR) {
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LFS_SEGENTRY(sup, fs, datosn(fs, old_iaddr), bp);
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#ifdef DIAGNOSTIC
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if (sup->su_nbytes < sizeof(struct dinode))
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panic("lfs_vfree: negative byte count (segment %d)",
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datosn(fs, old_iaddr));
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#endif
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sup->su_nbytes -= sizeof(struct dinode);
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(void) VOP_BWRITE(bp);
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}
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/* Set superblock modified bit and decrement file count. */
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fs->lfs_fmod = 1;
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--fs->lfs_nfiles;
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return (0);
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}
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