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/bio.h>
   41 #include <sys/buf.h>
   42 
   43 #include <fs/hpfs/hpfs.h>
   44 #include <fs/hpfs/hpfsmount.h>
   45 #include <fs/hpfs/hpfs_subr.h>
   46 
   47 int     hpfs_removedirent (struct hpfsmount *, lsn_t, char *, int, int *);
   48 
   49 /*
   50  * This routine traverse the b+ tree representing directory
   51  * looking for file named 'name'. Returns buf struct and hpfsdirent
   52  * pointer. Calling routine is supposed to brelse buffer.
   53  * name is supposed in Unix encodeing.
   54  */
   55 int
   56 hpfs_genlookupbyname (
   57         struct hpfsnode *dhp,
   58         char *name,
   59         int namelen,
   60         struct buf **bpp,
   61         struct hpfsdirent **depp)
   62 {
   63         struct hpfsmount *hpmp = dhp->h_hpmp;
   64         struct buf *bp;
   65         struct dirblk *dp;
   66         struct hpfsdirent *dep;
   67         lsn_t lsn;
   68         int error, res;
   69 
   70         dprintf(("hpfs_genlookupbyname(0x%x, %s (%d)): \n", 
   71                 dhp->h_no, name, namelen));
   72 
   73         lsn = ((alleaf_t *)dhp->h_fn.fn_abd)->al_lsn;
   74 dive:
   75         error = hpfs_breaddirblk (hpmp, lsn, &bp);
   76         if (error)
   77                 return (error);
   78 
   79         dp = (struct dirblk *) bp->b_data;
   80         dep = D_DIRENT(dp);
   81 
   82         while(!(dep->de_flag & DE_END)) {
   83                 dprintf(("no: 0x%x, size: %d, name: %2d:%.*s, flag: 0x%x\n",
   84                         dep->de_fnode, dep->de_size, dep->de_namelen,
   85                         dep->de_namelen, dep->de_name, dep->de_flag));
   86 
   87                 res = hpfs_cmpfname(hpmp, name, namelen,
   88                                 dep->de_name, dep->de_namelen, dep->de_cpid);
   89                 if (res == 0) {
   90                         *bpp = bp;
   91                         *depp = dep;
   92                         return (0);
   93                 } else if (res < 0)
   94                         break;
   95 
   96                 dep = (hpfsdirent_t *)(((caddr_t)dep) + dep->de_reclen);
   97         }
   98 
   99         if (dep->de_flag & DE_DOWN) {
  100                 lsn = DE_DOWNLSN(dep);
  101                 brelse(bp);
  102                 goto dive;
  103         }
  104 
  105         brelse(bp);
  106 
  107         return (ENOENT);
  108 }
  109 
  110 int
  111 hpfs_makefnode (
  112         struct vnode * dvp,
  113         struct vnode ** vpp,
  114         struct componentname *cnp,
  115         struct vattr *vap)
  116 {
  117 #ifdef HPFS_DEBUG
  118         register struct hpfsnode *dhp = VTOHP(dvp);
  119         dprintf(("hpfs_makefnode(0x%x, %s, %ld): \n",
  120                 dhp->h_no, cnp->cn_nameptr, cnp->cn_namelen));
  121 #endif
  122 
  123         return (EOPNOTSUPP);
  124 }
  125 
  126 int
  127 hpfs_removedirent (
  128         struct hpfsmount *hpmp,
  129         lsn_t lsn,
  130         char *name,
  131         int namelen,
  132         int *retp)
  133 {
  134 #if 0
  135         struct buf *bp;
  136         dirblk_t *dbp;
  137         struct hpfsdirent *dep;
  138         int deoff;
  139         int error, ret;
  140 
  141         dprintf(("hpfs_removedirent(0x%x, %.*s, %d): \n",
  142                  lsn, namelen, name, namelen));
  143 
  144         error = hpfs_breaddirblk (hpmp, lsn, &bp);
  145         if (error)
  146                 return (error);
  147 
  148         dbp = (dirblk_t *) bp->b_data;
  149         deoff = sizeof(dirblk_t);
  150         dep = DB_DIRENT(dbp);
  151 
  152         while(!(dep->de_flag & DE_END)) {
  153                 dprintf(("no: 0x%x, size: %d, name: %2d:%.*s, flag: 0x%x\n",
  154                         dep->de_fnode, dep->de_size, dep->de_namelen,
  155                         dep->de_namelen, dep->de_name, dep->de_flag));
  156 
  157                 res = hpfs_cmpfname(hpmp, name, namelen,
  158                                 dep->de_name, dep->de_namelen, dep->de_cpid);
  159                 if (res == 0) {
  160                         if (dep->de_flag & DE_DOWN) {
  161                                 /*XXXXXX*/
  162                         } else {
  163                                 /* XXX we can copy less */
  164                                 bcopy (DE_NEXTDE(dep), dep, DB_BSIZE - deoff - dep->de_reclen);
  165                                 dbp->d_freeoff -= dep->de_reclen;
  166                                 *retp = 0;
  167                         }
  168                         bdwrite (bp);
  169                         return (0);
  170                 } else if (res < 0)
  171                         break;
  172 
  173                 deoff += dep->de_reclen;
  174                 dep = DB_NEXTDE(dep);
  175         }
  176 
  177         if (dep->de_flag & DE_DOWN) {
  178                 error = hpfs_removede (hpmp, DE_DOWNLSN(dep), name, namelen, &ret);
  179                 if (error) {
  180                         brelse (bp);
  181                         return (error);
  182                 }
  183                 if (ret == 0) {
  184                         if (deoff > sizeof (dirblk_t)) {
  185                         } else if (deoff + dep->de_reclen < dbp->db_freeoff) {
  186                         }
  187                 }
  188         } else {
  189                 error = ENOENT;
  190         }
  191 
  192         brelse (bp);
  193         return (error);
  194 #endif
  195         return (EOPNOTSUPP);
  196 }
  197 
  198 int
  199 hpfs_removefnode (
  200         struct vnode * dvp,
  201         struct vnode * vp,
  202         struct componentname *cnp)
  203 {
  204 #ifdef HPFS_DEBUG
  205         register struct hpfsnode *dhp = VTOHP(dvp);
  206         register struct hpfsnode *hp = VTOHP(vp);
  207         dprintf(("hpfs_removefnode(0x%x, 0x%x, %s, %ld): \n",
  208                 dhp->h_no, hp->h_no, cnp->cn_nameptr, cnp->cn_namelen));
  209 #endif
  210 
  211 
  212         return (EOPNOTSUPP);
  213 }

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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