freebsd-dev/sys/fs/hpfs/hpfs_lookup.c

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1999-12-09 19:10:13 +00:00
/*-
* Copyright (c) 1998, 1999 Semen Ustimenko (semenu@FreeBSD.org)
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/namei.h>
#include <sys/malloc.h>
#include <sys/bio.h>
1999-12-09 19:10:13 +00:00
#include <sys/buf.h>
#include <fs/hpfs/hpfs.h>
#include <fs/hpfs/hpfsmount.h>
#include <fs/hpfs/hpfs_subr.h>
int hpfs_removedirent (struct hpfsmount *, lsn_t, char *, int, int *);
/*
* This routine traverse the b+ tree representing directory
* looking for file named 'name'. Returns buf struct and hpfsdirent
* pointer. Calling routine is supposed to brelse buffer.
* name is supposed in Unix encodeing.
*/
int
hpfs_genlookupbyname (
struct hpfsnode *dhp,
char *name,
int namelen,
struct buf **bpp,
struct hpfsdirent **depp)
{
struct hpfsmount *hpmp = dhp->h_hpmp;
struct buf *bp;
struct dirblk *dp;
struct hpfsdirent *dep;
lsn_t lsn;
int error, res;
dprintf(("hpfs_genlookupbyname(0x%x, %s (%d)): \n",
dhp->h_no, name, namelen));
lsn = ((alleaf_t *)dhp->h_fn.fn_abd)->al_lsn;
dive:
error = hpfs_breaddirblk (hpmp, lsn, &bp);
if (error)
return (error);
dp = (struct dirblk *) bp->b_data;
dep = D_DIRENT(dp);
while(!(dep->de_flag & DE_END)) {
dprintf(("no: 0x%x, size: %d, name: %2d:%.*s, flag: 0x%x\n",
dep->de_fnode, dep->de_size, dep->de_namelen,
dep->de_namelen, dep->de_name, dep->de_flag));
res = hpfs_cmpfname(hpmp, name, namelen,
dep->de_name, dep->de_namelen, dep->de_cpid);
if (res == 0) {
*bpp = bp;
*depp = dep;
return (0);
} else if (res < 0)
break;
dep = (hpfsdirent_t *)(((caddr_t)dep) + dep->de_reclen);
}
if (dep->de_flag & DE_DOWN) {
lsn = DE_DOWNLSN(dep);
brelse(bp);
goto dive;
}
brelse(bp);
return (ENOENT);
}
int
hpfs_makefnode (
struct vnode * dvp,
struct vnode ** vpp,
struct componentname *cnp,
struct vattr *vap)
{
#ifdef HPFS_DEBUG
register struct hpfsnode *dhp = VTOHP(dvp);
dprintf(("hpfs_makefnode(0x%x, %s, %ld): \n",
dhp->h_no, cnp->cn_nameptr, cnp->cn_namelen));
#endif
return (EOPNOTSUPP);
}
int
hpfs_removedirent (
struct hpfsmount *hpmp,
lsn_t lsn,
char *name,
int namelen,
int *retp)
{
#if 0
struct buf *bp;
dirblk_t *dbp;
struct hpfsdirent *dep;
int deoff;
int error, ret;
dprintf(("hpfs_removedirent(0x%x, %.*s, %d): \n",
lsn, namelen, name, namelen));
error = hpfs_breaddirblk (hpmp, lsn, &bp);
if (error)
return (error);
dbp = (dirblk_t *) bp->b_data;
deoff = sizeof(dirblk_t);
dep = DB_DIRENT(dbp);
while(!(dep->de_flag & DE_END)) {
dprintf(("no: 0x%x, size: %d, name: %2d:%.*s, flag: 0x%x\n",
dep->de_fnode, dep->de_size, dep->de_namelen,
dep->de_namelen, dep->de_name, dep->de_flag));
res = hpfs_cmpfname(hpmp, name, namelen,
dep->de_name, dep->de_namelen, dep->de_cpid);
if (res == 0) {
if (dep->de_flag & DE_DOWN) {
/*XXXXXX*/
} else {
/* XXX we can copy less */
bcopy (DE_NEXTDE(dep), dep, DB_BSIZE - deoff - dep->de_reclen);
dbp->d_freeoff -= dep->de_reclen;
*retp = 0;
}
bdwrite (bp);
return (0);
} else if (res < 0)
break;
deoff += dep->de_reclen;
dep = DB_NEXTDE(dep);
}
if (dep->de_flag & DE_DOWN) {
error = hpfs_removede (hpmp, DE_DOWNLSN(dep), name, namelen, &ret);
if (error) {
brelse (bp);
return (error);
}
if (ret == 0) {
if (deoff > sizeof (dirblk_t)) {
} else if (deoff + dep->de_reclen < dbp->db_freeoff) {
}
}
} else {
error = ENOENT;
}
brelse (bp);
return (error);
#endif
return (EOPNOTSUPP);
}
int
hpfs_removefnode (
struct vnode * dvp,
struct vnode * vp,
struct componentname *cnp)
{
#ifdef HPFS_DEBUG
register struct hpfsnode *dhp = VTOHP(dvp);
register struct hpfsnode *hp = VTOHP(vp);
dprintf(("hpfs_removefnode(0x%x, 0x%x, %s, %ld): \n",
dhp->h_no, hp->h_no, cnp->cn_nameptr, cnp->cn_namelen));
#endif
return (EOPNOTSUPP);
}