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/* $OpenBSD: lfs_alloc.c,v 1.11 2004/06/21 23:50:38 tholo Exp $ */
/* $NetBSD: lfs_alloc.c,v 1.4 1996/03/25 12:53:37 pk Exp $ */
/*
* Copyright (c) 1991, 1993, 1995
* 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.
*
* @(#)lfs_alloc.c 8.7 (Berkeley) 5/14/95
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/buf.h>
#include <sys/vnode.h>
#include <sys/syslog.h>
#include <sys/mount.h>
#include <sys/malloc.h>
#include <uvm/uvm_extern.h>
#include <ufs/ufs/quota.h>
#include <ufs/ufs/inode.h>
#include <ufs/ufs/ufsmount.h>
#include <ufs/ufs/ufs_extern.h>
#include <ufs/lfs/lfs.h>
#include <ufs/lfs/lfs_extern.h>
extern u_long nextgennumber;
/* Allocate a new inode. */
/* ARGSUSED */
int
lfs_valloc(v)
void *v;
{
struct vop_valloc_args /* {
struct vnode *a_pvp;
int a_mode;
struct ucred *a_cred;
struct vnode **a_vpp;
} */ *ap = v;
struct lfs *fs;
struct buf *bp;
struct ifile *ifp;
struct inode *ip;
struct vnode *vp;
ufs_daddr_t blkno;
ino_t new_ino;
u_long i, max;
int error;
/* Get the head of the freelist. */
fs = VTOI(ap->a_pvp)->i_lfs;
new_ino = fs->lfs_free;
#ifdef ALLOCPRINT
printf("lfs_ialloc: allocate inode %d\n", new_ino);
#endif
/*
* Remove the inode from the free list and write the new start
* of the free list into the superblock.
*/
LFS_IENTRY(ifp, fs, new_ino, bp);
if (ifp->if_daddr != LFS_UNUSED_DADDR)
panic("lfs_ialloc: inuse inode on the free list");
fs->lfs_free = ifp->if_nextfree;
brelse(bp);
/* Extend IFILE so that the next lfs_valloc will succeed. */
if (fs->lfs_free == LFS_UNUSED_INUM) {
vp = fs->lfs_ivnode;
ip = VTOI(vp);
blkno = lblkno(fs, ip->i_ffs_size);
lfs_balloc(vp, 0, fs->lfs_bsize, blkno, &bp);
ip->i_ffs_size += fs->lfs_bsize;
vnode_pager_setsize(vp, (u_long)ip->i_ffs_size);
vnode_pager_uncache(vp);
i = (blkno - fs->lfs_segtabsz - fs->lfs_cleansz) *
fs->lfs_ifpb;
fs->lfs_free = i;
max = i + fs->lfs_ifpb;
for (ifp = (struct ifile *)bp->b_data; i < max; ++ifp) {
ifp->if_version = 1;
ifp->if_daddr = LFS_UNUSED_DADDR;
ifp->if_nextfree = ++i;
}
ifp--;
ifp->if_nextfree = LFS_UNUSED_INUM;
if ((error = VOP_BWRITE(bp)) != 0)
return (error);
}
/* Create a vnode to associate with the inode. */
if ((error = lfs_vcreate(ap->a_pvp->v_mount, new_ino, &vp)) != 0)
return (error);
ip = VTOI(vp);
/* Zero out the direct and indirect block addresses. */
bzero(&ip->i_din.ffs_din, sizeof(struct dinode));
ip->i_din.ffs_din.di_inumber = new_ino;
/* Set a new generation number for this inode. */
if (++nextgennumber < (u_long)time_second)
nextgennumber = time_second;
ip->i_ffs_gen = nextgennumber;
/* Insert into the inode hash table. */
ufs_ihashins(ip);
error = ufs_vinit(vp->v_mount, lfs_specop_p, LFS_FIFOOPS, &vp);
if (error) {
vput(vp);
*ap->a_vpp = NULL;
return (error);
}
*ap->a_vpp = vp;
vp->v_flag |= VDIROP;
VREF(ip->i_devvp);
/* Set superblock modified bit and increment file count. */
fs->lfs_fmod = 1;
++fs->lfs_nfiles;
return (0);
}
/* Create a new vnode/inode pair and initialize what fields we can. */
int
lfs_vcreate(mp, ino, vpp)
struct mount *mp;
ino_t ino;
struct vnode **vpp;
{
extern int (**lfs_vnodeop_p)(void *);
struct inode *ip;
struct ufsmount *ump;
int error;
#ifdef QUOTA
int i;
#endif
/* Create the vnode. */
if ((error = getnewvnode(VT_LFS, mp, lfs_vnodeop_p, vpp)) != 0) {
*vpp = NULL;
return (error);
}
/* Get a pointer to the private mount structure. */
ump = VFSTOUFS(mp);
/* Initialize the inode. */
MALLOC(ip, struct inode *, sizeof(struct inode), M_LFSNODE, M_WAITOK);
(*vpp)->v_data = ip;
ip->i_vnode = *vpp;
ip->i_devvp = ump->um_devvp;
ip->i_flag = IN_MODIFIED;
ip->i_dev = ump->um_dev;
ip->i_number = ip->i_din.ffs_din.di_inumber = ino;
ip->i_lfs = ump->um_lfs;
#ifdef QUOTA
for (i = 0; i < MAXQUOTAS; i++)
ip->i_dquot[i] = NODQUOT;
#endif
ip->i_lockf = 0;
ip->i_diroff = 0;
ip->i_ffs_mode = 0;
ip->i_ffs_size = 0;
ip->i_ffs_blocks = 0;
++ump->um_lfs->lfs_uinodes;
return (0);
}
/* Free an inode. */
/* ARGUSED */
int
lfs_vfree(v)
void *v;
{
struct vop_vfree_args /* {
struct vnode *a_pvp;
ino_t a_ino;
int a_mode;
} */ *ap = v;
SEGUSE *sup;
struct buf *bp;
struct ifile *ifp;
struct inode *ip;
struct lfs *fs;
ufs_daddr_t old_iaddr;
ino_t ino;
/* Get the inode number and file system. */
ip = VTOI(ap->a_pvp);
fs = ip->i_lfs;
ino = ip->i_number;
if (ip->i_flag & IN_MODIFIED) {
--fs->lfs_uinodes;
ip->i_flag &=
~(IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE);
}
/*
* Set the ifile's inode entry to unused, increment its version number
* and link it into the free chain.
*/
LFS_IENTRY(ifp, fs, ino, bp);
old_iaddr = ifp->if_daddr;
ifp->if_daddr = LFS_UNUSED_DADDR;
++ifp->if_version;
ifp->if_nextfree = fs->lfs_free;
fs->lfs_free = ino;
(void) VOP_BWRITE(bp);
if (old_iaddr != LFS_UNUSED_DADDR) {
LFS_SEGENTRY(sup, fs, datosn(fs, old_iaddr), bp);
#ifdef DIAGNOSTIC
if (sup->su_nbytes < sizeof(struct dinode))
panic("lfs_vfree: negative byte count (segment %d)",
datosn(fs, old_iaddr));
#endif
sup->su_nbytes -= sizeof(struct dinode);
(void) VOP_BWRITE(bp);
}
/* Set superblock modified bit and decrement file count. */
fs->lfs_fmod = 1;
--fs->lfs_nfiles;
return (0);
}
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