hpfs_lookup.c

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    1 /*-
    2  * Copyright (c) 1998, 1999 Semen Ustimenko (semenu@FreeBSD.org)
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD$
   27  */
   28 
   29 #include <sys/param.h>
   30 #include <sys/systm.h>
   31 #include <sys/kernel.h>
   32 #include <sys/proc.h>
   33 #include <sys/time.h>
   34 #include <sys/types.h>
   35 #include <sys/stat.h>
   36 #include <sys/vnode.h>
   37 #include <sys/mount.h>
   38 #include <sys/namei.h>
   39 #include <sys/malloc.h>
   40 #include <sys/buf.h>
   41 
   42 #include <fs/hpfs/hpfs.h>
   43 #include <fs/hpfs/hpfsmount.h>
   44 #include <fs/hpfs/hpfs_subr.h>
   45 
   46 int     hpfs_removedirent (struct hpfsmount *, lsn_t, char *, int, int *);
   47 
   48 /*
   49  * This routine traverse the b+ tree representing directory
   50  * looking for file named 'name'. Returns buf struct and hpfsdirent
   51  * pointer. Calling routine is supposed to brelse buffer.
   52  * name is supposed in Unix encodeing.
   53  */
   54 int
   55 hpfs_genlookupbyname (
   56         struct hpfsnode *dhp,
   57         char *name,
   58         int namelen,
   59         struct buf **bpp,
   60         struct hpfsdirent **depp)
   61 {
   62         struct hpfsmount *hpmp = dhp->h_hpmp;
   63         struct buf *bp;
   64         struct dirblk *dp;
   65         struct hpfsdirent *dep;
   66         lsn_t lsn;
   67         int error, res;
   68 
   69         dprintf(("hpfs_genlookupbyname(0x%x, %s (%d)): \n", 
   70                 dhp->h_no, name, namelen));
   71 
   72         lsn = ((alleaf_t *)dhp->h_fn.fn_abd)->al_lsn;
   73 dive:
   74         error = hpfs_breaddirblk (hpmp, lsn, &bp);
   75         if (error)
   76                 return (error);
   77 
   78         dp = (struct dirblk *) bp->b_data;
   79         dep = D_DIRENT(dp);
   80 
   81         while(!(dep->de_flag & DE_END)) {
   82                 dprintf(("no: 0x%x, size: %d, name: %2d:%.*s, flag: 0x%x\n",
   83                         dep->de_fnode, dep->de_size, dep->de_namelen,
   84                         dep->de_namelen, dep->de_name, dep->de_flag));
   85 
   86                 res = hpfs_cmpfname(hpmp, name, namelen,
   87                                 dep->de_name, dep->de_namelen, dep->de_cpid);
   88                 if (res == 0) {
   89                         *bpp = bp;
   90                         *depp = dep;
   91                         return (0);
   92                 } else if (res < 0)
   93                         break;
   94 
   95                 dep = (hpfsdirent_t *)(((caddr_t)dep) + dep->de_reclen);
   96         }
   97 
   98         if (dep->de_flag & DE_DOWN) {
   99                 lsn = DE_DOWNLSN(dep);
  100                 brelse(bp);
  101                 goto dive;
  102         }
  103 
  104         brelse(bp);
  105 
  106         return (ENOENT);
  107 }
  108 
  109 int
  110 hpfs_makefnode (
  111         struct vnode * dvp,
  112         struct vnode ** vpp,
  113         struct componentname *cnp,
  114         struct vattr *vap)
  115 {
  116 #ifdef HPFS_DEBUG
  117         register struct hpfsnode *dhp = VTOHP(dvp);
  118         dprintf(("hpfs_makefnode(0x%x, %s, %ld): \n",
  119                 dhp->h_no, cnp->cn_nameptr, cnp->cn_namelen));
  120 #endif
  121 
  122         return (EOPNOTSUPP);
  123 }
  124 
  125 int
  126 hpfs_removedirent (
  127         struct hpfsmount *hpmp,
  128         lsn_t lsn,
  129         char *name,
  130         int namelen,
  131         int *retp)
  132 {
  133 #if 0
  134         struct buf *bp;
  135         dirblk_t *dbp;
  136         struct hpfsdirent *dep;
  137         int deoff;
  138         int error, ret;
  139 
  140         dprintf(("hpfs_removedirent(0x%x, %.*s, %d): \n",
  141                  lsn, namelen, name, namelen));
  142 
  143         error = hpfs_breaddirblk (hpmp, lsn, &bp);
  144         if (error)
  145                 return (error);
  146 
  147         dbp = (dirblk_t *) bp->b_data;
  148         deoff = sizeof(dirblk_t);
  149         dep = DB_DIRENT(dbp);
  150 
  151         while(!(dep->de_flag & DE_END)) {
  152                 dprintf(("no: 0x%x, size: %d, name: %2d:%.*s, flag: 0x%x\n",
  153                         dep->de_fnode, dep->de_size, dep->de_namelen,
  154                         dep->de_namelen, dep->de_name, dep->de_flag));
  155 
  156                 res = hpfs_cmpfname(hpmp, name, namelen,
  157                                 dep->de_name, dep->de_namelen, dep->de_cpid);
  158                 if (res == 0) {
  159                         if (dep->de_flag & DE_DOWN) {
  160                                 /*XXXXXX*/
  161                         } else {
  162                                 /* XXX we can copy less */
  163                                 bcopy (DE_NEXTDE(dep), dep, DB_BSIZE - deoff - dep->de_reclen);
  164                                 dbp->d_freeoff -= dep->de_reclen;
  165                                 *retp = 0;
  166                         }
  167                         bdwrite (bp);
  168                         return (0);
  169                 } else if (res < 0)
  170                         break;
  171 
  172                 deoff += dep->de_reclen;
  173                 dep = DB_NEXTDE(dep);
  174         }
  175 
  176         if (dep->de_flag & DE_DOWN) {
  177                 error = hpfs_removede (hpmp, DE_DOWNLSN(dep), name, namelen, &ret);
  178                 if (error) {
  179                         brelse (bp);
  180                         return (error);
  181                 }
  182                 if (ret == 0) {
  183                         if (deoff > sizeof (dirblk_t)) {
  184                         } else if (deoff + dep->de_reclen < dbp->db_freeoff) {
  185                         }
  186                 }
  187         } else {
  188                 error = ENOENT;
  189         }
  190 
  191         brelse (bp);
  192         return (error);
  193 #endif
  194         return (EOPNOTSUPP);
  195 }
  196 
  197 int
  198 hpfs_removefnode (
  199         struct vnode * dvp,
  200         struct vnode * vp,
  201         struct componentname *cnp)
  202 {
  203 #ifdef HPFS_DEBUG
  204         register struct hpfsnode *dhp = VTOHP(dvp);
  205         register struct hpfsnode *hp = VTOHP(vp);
  206         dprintf(("hpfs_removefnode(0x%x, 0x%x, %s, %ld): \n",
  207                 dhp->h_no, hp->h_no, cnp->cn_nameptr, cnp->cn_namelen));
  208 #endif
  209 
  210 
  211         return (EOPNOTSUPP);
  212 }

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FreeBSD/Linux Kernel Cross Reference sys/fs/hpfs/hpfs_lookup.c

FreeBSD/Linux Kernel Cross Reference
sys/fs/hpfs/hpfs_lookup.c