The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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sys/fs/ntfs/ntfs_subr.c

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    1 /*      $NetBSD: ntfs_subr.c,v 1.23 1999/10/31 19:45:26 jdolecek Exp $  */
    2 
    3 /*-
    4  * Copyright (c) 1998, 1999 Semen Ustimenko (semenu@FreeBSD.org)
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  *
   28  * $FreeBSD: releng/5.1/sys/fs/ntfs/ntfs_subr.c 111856 2003-03-04 00:04:44Z jeff $
   29  */
   30 
   31 #include <sys/param.h>
   32 #include <sys/types.h>
   33 #include <sys/systm.h>
   34 #include <sys/namei.h>
   35 #include <sys/kernel.h>
   36 #include <sys/vnode.h>
   37 #include <sys/mount.h>
   38 #include <sys/bio.h>
   39 #include <sys/buf.h>
   40 #include <sys/file.h>
   41 #include <sys/malloc.h>
   42 #include <sys/lock.h>
   43 
   44 /* #define NTFS_DEBUG 1 */
   45 #include <fs/ntfs/ntfs.h>
   46 #include <fs/ntfs/ntfsmount.h>
   47 #include <fs/ntfs/ntfs_inode.h>
   48 #include <fs/ntfs/ntfs_vfsops.h>
   49 #include <fs/ntfs/ntfs_subr.h>
   50 #include <fs/ntfs/ntfs_compr.h>
   51 #include <fs/ntfs/ntfs_ihash.h>
   52 
   53 MALLOC_DEFINE(M_NTFSNTVATTR, "NTFS vattr", "NTFS file attribute information");
   54 MALLOC_DEFINE(M_NTFSRDATA, "NTFS res data", "NTFS resident data");
   55 MALLOC_DEFINE(M_NTFSRUN, "NTFS vrun", "NTFS vrun storage");
   56 MALLOC_DEFINE(M_NTFSDECOMP, "NTFS decomp", "NTFS decompression temporary");
   57 
   58 static int ntfs_ntlookupattr(struct ntfsmount *, const char *, int, int *, char **);
   59 static int ntfs_findvattr(struct ntfsmount *, struct ntnode *, struct ntvattr **, struct ntvattr **, u_int32_t, const char *, size_t, cn_t);
   60 static int ntfs_uastricmp(struct ntfsmount *, const wchar *, size_t, const char *, size_t);
   61 static int ntfs_uastrcmp(struct ntfsmount *, const wchar *, size_t, const char *, size_t);
   62 
   63 /* table for mapping Unicode chars into uppercase; it's filled upon first
   64  * ntfs mount, freed upon last ntfs umount */
   65 static wchar *ntfs_toupper_tab;
   66 #define NTFS_TOUPPER(ch)        (ntfs_toupper_tab[(ch)])
   67 static struct lock ntfs_toupper_lock;
   68 static signed int ntfs_toupper_usecount;
   69 
   70 /* support macro for ntfs_ntvattrget() */
   71 #define NTFS_AALPCMP(aalp,type,name,namelen) (                          \
   72   (aalp->al_type == type) && (aalp->al_namelen == namelen) &&           \
   73   !NTFS_UASTRCMP(aalp->al_name,aalp->al_namelen,name,namelen) )
   74 
   75 /*
   76  * 
   77  */
   78 int
   79 ntfs_ntvattrrele(vap)
   80         struct ntvattr * vap;
   81 {
   82         dprintf(("ntfs_ntvattrrele: ino: %d, type: 0x%x\n",
   83                  vap->va_ip->i_number, vap->va_type));
   84 
   85         ntfs_ntrele(vap->va_ip);
   86 
   87         return (0);
   88 }
   89 
   90 /*
   91  * find the attribute in the ntnode
   92  */
   93 static int
   94 ntfs_findvattr(ntmp, ip, lvapp, vapp, type, name, namelen, vcn)
   95         struct ntfsmount *ntmp;
   96         struct ntnode *ip;
   97         struct ntvattr **lvapp, **vapp;
   98         u_int32_t type;
   99         const char *name;
  100         size_t namelen;
  101         cn_t vcn;
  102 {
  103         int error;
  104         struct ntvattr *vap;
  105 
  106         if((ip->i_flag & IN_LOADED) == 0) {
  107                 dprintf(("ntfs_findvattr: node not loaded, ino: %d\n",
  108                        ip->i_number));
  109                 error = ntfs_loadntnode(ntmp,ip);
  110                 if (error) {
  111                         printf("ntfs_findvattr: FAILED TO LOAD INO: %d\n",
  112                                ip->i_number);
  113                         return (error);
  114                 }
  115         }
  116 
  117         *lvapp = NULL;
  118         *vapp = NULL;
  119         LIST_FOREACH(vap, &ip->i_valist, va_list) {
  120                 ddprintf(("ntfs_findvattr: type: 0x%x, vcn: %d - %d\n", \
  121                           vap->va_type, (u_int32_t) vap->va_vcnstart, \
  122                           (u_int32_t) vap->va_vcnend));
  123                 if ((vap->va_type == type) &&
  124                     (vap->va_vcnstart <= vcn) && (vap->va_vcnend >= vcn) &&
  125                     (vap->va_namelen == namelen) &&
  126                     (strncmp(name, vap->va_name, namelen) == 0)) {
  127                         *vapp = vap;
  128                         ntfs_ntref(vap->va_ip);
  129                         return (0);
  130                 }
  131                 if (vap->va_type == NTFS_A_ATTRLIST)
  132                         *lvapp = vap;
  133         }
  134 
  135         return (-1);
  136 }
  137 
  138 /*
  139  * Search attribute specifed in ntnode (load ntnode if nessecary).
  140  * If not found but ATTR_A_ATTRLIST present, read it in and search throught.
  141  * VOP_VGET node needed, and lookup througth it's ntnode (load if nessesary).
  142  *
  143  * ntnode should be locked
  144  */
  145 int
  146 ntfs_ntvattrget(
  147                 struct ntfsmount * ntmp,
  148                 struct ntnode * ip,
  149                 u_int32_t type,
  150                 const char *name,
  151                 cn_t vcn,
  152                 struct ntvattr ** vapp)
  153 {
  154         struct ntvattr *lvap = NULL;
  155         struct attr_attrlist *aalp;
  156         struct attr_attrlist *nextaalp;
  157         struct vnode   *newvp;
  158         struct ntnode  *newip;
  159         caddr_t         alpool;
  160         size_t          namelen, len;
  161         int             error;
  162 
  163         *vapp = NULL;
  164 
  165         if (name) {
  166                 dprintf(("ntfs_ntvattrget: " \
  167                          "ino: %d, type: 0x%x, name: %s, vcn: %d\n", \
  168                          ip->i_number, type, name, (u_int32_t) vcn));
  169                 namelen = strlen(name);
  170         } else {
  171                 dprintf(("ntfs_ntvattrget: " \
  172                          "ino: %d, type: 0x%x, vcn: %d\n", \
  173                          ip->i_number, type, (u_int32_t) vcn));
  174                 name = "";
  175                 namelen = 0;
  176         }
  177 
  178         error = ntfs_findvattr(ntmp, ip, &lvap, vapp, type, name, namelen, vcn);
  179         if (error >= 0)
  180                 return (error);
  181 
  182         if (!lvap) {
  183                 dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: " \
  184                        "ino: %d, type: 0x%x, name: %s, vcn: %d\n", \
  185                        ip->i_number, type, name, (u_int32_t) vcn));
  186                 return (ENOENT);
  187         }
  188         /* Scan $ATTRIBUTE_LIST for requested attribute */
  189         len = lvap->va_datalen;
  190         MALLOC(alpool, caddr_t, len, M_TEMP, M_WAITOK);
  191         error = ntfs_readntvattr_plain(ntmp, ip, lvap, 0, len, alpool, &len,
  192                         NULL);
  193         if (error)
  194                 goto out;
  195 
  196         aalp = (struct attr_attrlist *) alpool;
  197         nextaalp = NULL;
  198 
  199         for(; len > 0; aalp = nextaalp) {
  200                 dprintf(("ntfs_ntvattrget: " \
  201                          "attrlist: ino: %d, attr: 0x%x, vcn: %d\n", \
  202                          aalp->al_inumber, aalp->al_type, \
  203                          (u_int32_t) aalp->al_vcnstart));
  204 
  205                 if (len > aalp->reclen) {
  206                         nextaalp = NTFS_NEXTREC(aalp, struct attr_attrlist *);
  207                 } else {
  208                         nextaalp = NULL;
  209                 }
  210                 len -= aalp->reclen;
  211 
  212                 if (!NTFS_AALPCMP(aalp, type, name, namelen) ||
  213                     (nextaalp && (nextaalp->al_vcnstart <= vcn) &&
  214                      NTFS_AALPCMP(nextaalp, type, name, namelen)))
  215                         continue;
  216 
  217                 dprintf(("ntfs_ntvattrget: attribute in ino: %d\n",
  218                                  aalp->al_inumber));
  219 
  220                 /* this is not a main record, so we can't use just plain
  221                    vget() */
  222                 error = ntfs_vgetex(ntmp->ntm_mountp, aalp->al_inumber,
  223                                 NTFS_A_DATA, NULL, LK_EXCLUSIVE,
  224                                 VG_EXT, curthread, &newvp);
  225                 if (error) {
  226                         printf("ntfs_ntvattrget: CAN'T VGET INO: %d\n",
  227                                aalp->al_inumber);
  228                         goto out;
  229                 }
  230                 newip = VTONT(newvp);
  231                 /* XXX have to lock ntnode */
  232                 error = ntfs_findvattr(ntmp, newip, &lvap, vapp,
  233                                 type, name, namelen, vcn);
  234                 vput(newvp);
  235                 if (error == 0)
  236                         goto out;
  237                 printf("ntfs_ntvattrget: ATTRLIST ERROR.\n");
  238                 break;
  239         }
  240         error = ENOENT;
  241 
  242         dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: " \
  243                "ino: %d, type: 0x%x, name: %.*s, vcn: %d\n", \
  244                ip->i_number, type, (int) namelen, name, (u_int32_t) vcn));
  245 out:
  246         FREE(alpool, M_TEMP);
  247         return (error);
  248 }
  249 
  250 /*
  251  * Read ntnode from disk, make ntvattr list.
  252  *
  253  * ntnode should be locked
  254  */
  255 int
  256 ntfs_loadntnode(
  257               struct ntfsmount * ntmp,
  258               struct ntnode * ip)
  259 {
  260         struct filerec  *mfrp;
  261         daddr_t         bn;
  262         int             error,off;
  263         struct attr    *ap;
  264         struct ntvattr *nvap;
  265 
  266         dprintf(("ntfs_loadntnode: loading ino: %d\n",ip->i_number));
  267 
  268         MALLOC(mfrp, struct filerec *, ntfs_bntob(ntmp->ntm_bpmftrec),
  269                M_TEMP, M_WAITOK);
  270 
  271         if (ip->i_number < NTFS_SYSNODESNUM) {
  272                 struct buf     *bp;
  273 
  274                 dprintf(("ntfs_loadntnode: read system node\n"));
  275 
  276                 bn = ntfs_cntobn(ntmp->ntm_mftcn) +
  277                         ntmp->ntm_bpmftrec * ip->i_number;
  278 
  279                 error = bread(ntmp->ntm_devvp,
  280                               bn, ntfs_bntob(ntmp->ntm_bpmftrec),
  281                               NOCRED, &bp);
  282                 if (error) {
  283                         printf("ntfs_loadntnode: BREAD FAILED\n");
  284                         brelse(bp);
  285                         goto out;
  286                 }
  287                 memcpy(mfrp, bp->b_data, ntfs_bntob(ntmp->ntm_bpmftrec));
  288                 bqrelse(bp);
  289         } else {
  290                 struct vnode   *vp;
  291 
  292                 vp = ntmp->ntm_sysvn[NTFS_MFTINO];
  293                 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
  294                                ip->i_number * ntfs_bntob(ntmp->ntm_bpmftrec),
  295                                ntfs_bntob(ntmp->ntm_bpmftrec), mfrp, NULL);
  296                 if (error) {
  297                         printf("ntfs_loadntnode: ntfs_readattr failed\n");
  298                         goto out;
  299                 }
  300         }
  301 
  302         /* Check if magic and fixups are correct */
  303         error = ntfs_procfixups(ntmp, NTFS_FILEMAGIC, (caddr_t)mfrp,
  304                                 ntfs_bntob(ntmp->ntm_bpmftrec));
  305         if (error) {
  306                 printf("ntfs_loadntnode: BAD MFT RECORD %d\n",
  307                        (u_int32_t) ip->i_number);
  308                 goto out;
  309         }
  310 
  311         dprintf(("ntfs_loadntnode: load attrs for ino: %d\n",ip->i_number));
  312         off = mfrp->fr_attroff;
  313         ap = (struct attr *) ((caddr_t)mfrp + off);
  314 
  315         LIST_INIT(&ip->i_valist);
  316         
  317         while (ap->a_hdr.a_type != -1) {
  318                 error = ntfs_attrtontvattr(ntmp, &nvap, ap);
  319                 if (error)
  320                         break;
  321                 nvap->va_ip = ip;
  322 
  323                 LIST_INSERT_HEAD(&ip->i_valist, nvap, va_list);
  324 
  325                 off += ap->a_hdr.reclen;
  326                 ap = (struct attr *) ((caddr_t)mfrp + off);
  327         }
  328         if (error) {
  329                 printf("ntfs_loadntnode: failed to load attr ino: %d\n",
  330                        ip->i_number);
  331                 goto out;
  332         }
  333 
  334         ip->i_mainrec = mfrp->fr_mainrec;
  335         ip->i_nlink = mfrp->fr_nlink;
  336         ip->i_frflag = mfrp->fr_flags;
  337 
  338         ip->i_flag |= IN_LOADED;
  339 
  340 out:
  341         FREE(mfrp, M_TEMP);
  342         return (error);
  343 }
  344                 
  345 /*
  346  * Routine locks ntnode and increase usecount, just opposite of
  347  * ntfs_ntput().
  348  */
  349 int
  350 ntfs_ntget(ip)
  351         struct ntnode *ip;
  352 {
  353         dprintf(("ntfs_ntget: get ntnode %d: %p, usecount: %d\n",
  354                 ip->i_number, ip, ip->i_usecount));
  355 
  356         mtx_lock(&ip->i_interlock);
  357         ip->i_usecount++;
  358         lockmgr(&ip->i_lock, LK_EXCLUSIVE | LK_INTERLOCK, &ip->i_interlock,
  359             NULL);
  360 
  361         return 0;
  362 }
  363 
  364 /*
  365  * Routine search ntnode in hash, if found: lock, inc usecount and return.
  366  * If not in hash allocate structure for ntnode, prefill it, lock,
  367  * inc count and return.
  368  *
  369  * ntnode returned locked
  370  */
  371 int
  372 ntfs_ntlookup(
  373            struct ntfsmount * ntmp,
  374            ino_t ino,
  375            struct ntnode ** ipp)
  376 {
  377         struct ntnode  *ip;
  378 
  379         dprintf(("ntfs_ntlookup: looking for ntnode %d\n", ino));
  380 
  381         do {
  382                 if ((ip = ntfs_nthashlookup(ntmp->ntm_dev, ino)) != NULL) {
  383                         ntfs_ntget(ip);
  384                         dprintf(("ntfs_ntlookup: ntnode %d: %p, usecount: %d\n",
  385                                 ino, ip, ip->i_usecount));
  386                         *ipp = ip;
  387                         return (0);
  388                 }
  389         } while (lockmgr(&ntfs_hashlock, LK_EXCLUSIVE | LK_SLEEPFAIL, NULL,
  390             NULL));
  391 
  392         MALLOC(ip, struct ntnode *, sizeof(struct ntnode), M_NTFSNTNODE,
  393                 M_WAITOK | M_ZERO);
  394         ddprintf(("ntfs_ntlookup: allocating ntnode: %d: %p\n", ino, ip));
  395 
  396         /* Generic initialization */
  397         ip->i_devvp = ntmp->ntm_devvp;
  398         ip->i_dev = ntmp->ntm_dev;
  399         ip->i_number = ino;
  400         ip->i_mp = ntmp;
  401 
  402         LIST_INIT(&ip->i_fnlist);
  403         VREF(ip->i_devvp);
  404 
  405         /* init lock and lock the newborn ntnode */
  406         lockinit(&ip->i_lock, PINOD, "ntnode", 0, LK_EXCLUSIVE);
  407         mtx_init(&ip->i_interlock, "ntnode interlock", NULL, MTX_DEF);
  408         ntfs_ntget(ip);
  409 
  410         ntfs_nthashins(ip);
  411 
  412         lockmgr(&ntfs_hashlock, LK_RELEASE, NULL, NULL);
  413 
  414         *ipp = ip;
  415 
  416         dprintf(("ntfs_ntlookup: ntnode %d: %p, usecount: %d\n",
  417                 ino, ip, ip->i_usecount));
  418 
  419         return (0);
  420 }
  421 
  422 /*
  423  * Decrement usecount of ntnode and unlock it, if usecount reach zero,
  424  * deallocate ntnode.
  425  *
  426  * ntnode should be locked on entry, and unlocked on return.
  427  */
  428 void
  429 ntfs_ntput(ip)
  430         struct ntnode *ip;
  431 {
  432         struct ntvattr *vap;
  433 
  434         dprintf(("ntfs_ntput: rele ntnode %d: %p, usecount: %d\n",
  435                 ip->i_number, ip, ip->i_usecount));
  436 
  437         mtx_lock(&ip->i_interlock);
  438         ip->i_usecount--;
  439 
  440 #ifdef DIAGNOSTIC
  441         if (ip->i_usecount < 0) {
  442                 panic("ntfs_ntput: ino: %d usecount: %d \n",
  443                       ip->i_number,ip->i_usecount);
  444         }
  445 #endif
  446 
  447         if (ip->i_usecount > 0) {
  448                 lockmgr(&ip->i_lock, LK_RELEASE|LK_INTERLOCK, &ip->i_interlock,
  449                     NULL);
  450                 return;
  451         }
  452 
  453         dprintf(("ntfs_ntput: deallocating ntnode: %d\n", ip->i_number));
  454 
  455         if (LIST_FIRST(&ip->i_fnlist))
  456                 panic("ntfs_ntput: ntnode has fnodes\n");
  457 
  458         ntfs_nthashrem(ip);
  459 
  460         while ((vap = LIST_FIRST(&ip->i_valist)) != NULL) {
  461                 LIST_REMOVE(vap,va_list);
  462                 ntfs_freentvattr(vap);
  463         }
  464         mtx_unlock(&ip->i_interlock);
  465         mtx_destroy(&ip->i_interlock);
  466         lockdestroy(&ip->i_lock);
  467         vrele(ip->i_devvp);
  468         FREE(ip, M_NTFSNTNODE);
  469 }
  470 
  471 /*
  472  * increment usecount of ntnode 
  473  */
  474 void
  475 ntfs_ntref(ip)
  476         struct ntnode *ip;
  477 {
  478         mtx_lock(&ip->i_interlock);
  479         ip->i_usecount++;
  480         mtx_unlock(&ip->i_interlock);
  481 
  482         dprintf(("ntfs_ntref: ino %d, usecount: %d\n",
  483                 ip->i_number, ip->i_usecount));
  484                         
  485 }
  486 
  487 /*
  488  * Decrement usecount of ntnode.
  489  */
  490 void
  491 ntfs_ntrele(ip)
  492         struct ntnode *ip;
  493 {
  494         dprintf(("ntfs_ntrele: rele ntnode %d: %p, usecount: %d\n",
  495                 ip->i_number, ip, ip->i_usecount));
  496 
  497         mtx_lock(&ip->i_interlock);
  498         ip->i_usecount--;
  499 
  500         if (ip->i_usecount < 0)
  501                 panic("ntfs_ntrele: ino: %d usecount: %d \n",
  502                       ip->i_number,ip->i_usecount);
  503         mtx_unlock(&ip->i_interlock);
  504 }
  505 
  506 /*
  507  * Deallocate all memory allocated for ntvattr
  508  */
  509 void
  510 ntfs_freentvattr(vap)
  511         struct ntvattr * vap;
  512 {
  513         if (vap->va_flag & NTFS_AF_INRUN) {
  514                 if (vap->va_vruncn)
  515                         FREE(vap->va_vruncn, M_NTFSRUN);
  516                 if (vap->va_vruncl)
  517                         FREE(vap->va_vruncl, M_NTFSRUN);
  518         } else {
  519                 if (vap->va_datap)
  520                         FREE(vap->va_datap, M_NTFSRDATA);
  521         }
  522         FREE(vap, M_NTFSNTVATTR);
  523 }
  524 
  525 /*
  526  * Convert disk image of attribute into ntvattr structure,
  527  * runs are expanded also.
  528  */
  529 int
  530 ntfs_attrtontvattr(
  531                    struct ntfsmount * ntmp,
  532                    struct ntvattr ** rvapp,
  533                    struct attr * rap)
  534 {
  535         int             error, i;
  536         struct ntvattr *vap;
  537 
  538         error = 0;
  539         *rvapp = NULL;
  540 
  541         MALLOC(vap, struct ntvattr *, sizeof(struct ntvattr),
  542                 M_NTFSNTVATTR, M_WAITOK | M_ZERO);
  543         vap->va_ip = NULL;
  544         vap->va_flag = rap->a_hdr.a_flag;
  545         vap->va_type = rap->a_hdr.a_type;
  546         vap->va_compression = rap->a_hdr.a_compression;
  547         vap->va_index = rap->a_hdr.a_index;
  548 
  549         ddprintf(("type: 0x%x, index: %d", vap->va_type, vap->va_index));
  550 
  551         vap->va_namelen = rap->a_hdr.a_namelen;
  552         if (rap->a_hdr.a_namelen) {
  553                 wchar *unp = (wchar *) ((caddr_t) rap + rap->a_hdr.a_nameoff);
  554                 ddprintf((", name:["));
  555                 for (i = 0; i < vap->va_namelen; i++) {
  556                         vap->va_name[i] = unp[i];
  557                         ddprintf(("%c", vap->va_name[i]));
  558                 }
  559                 ddprintf(("]"));
  560         }
  561         if (vap->va_flag & NTFS_AF_INRUN) {
  562                 ddprintf((", nonres."));
  563                 vap->va_datalen = rap->a_nr.a_datalen;
  564                 vap->va_allocated = rap->a_nr.a_allocated;
  565                 vap->va_vcnstart = rap->a_nr.a_vcnstart;
  566                 vap->va_vcnend = rap->a_nr.a_vcnend;
  567                 vap->va_compressalg = rap->a_nr.a_compressalg;
  568                 error = ntfs_runtovrun(&(vap->va_vruncn), &(vap->va_vruncl),
  569                                        &(vap->va_vruncnt),
  570                                        (caddr_t) rap + rap->a_nr.a_dataoff);
  571         } else {
  572                 vap->va_compressalg = 0;
  573                 ddprintf((", res."));
  574                 vap->va_datalen = rap->a_r.a_datalen;
  575                 vap->va_allocated = rap->a_r.a_datalen;
  576                 vap->va_vcnstart = 0;
  577                 vap->va_vcnend = ntfs_btocn(vap->va_allocated);
  578                 MALLOC(vap->va_datap, caddr_t, vap->va_datalen,
  579                        M_NTFSRDATA, M_WAITOK);
  580                 memcpy(vap->va_datap, (caddr_t) rap + rap->a_r.a_dataoff,
  581                        rap->a_r.a_datalen);
  582         }
  583         ddprintf((", len: %d", vap->va_datalen));
  584 
  585         if (error)
  586                 FREE(vap, M_NTFSNTVATTR);
  587         else
  588                 *rvapp = vap;
  589 
  590         ddprintf(("\n"));
  591 
  592         return (error);
  593 }
  594 
  595 /*
  596  * Expand run into more utilizable and more memory eating format.
  597  */
  598 int
  599 ntfs_runtovrun(
  600                cn_t ** rcnp,
  601                cn_t ** rclp,
  602                u_long * rcntp,
  603                u_int8_t * run)
  604 {
  605         u_int32_t       off;
  606         u_int32_t       sz, i;
  607         cn_t           *cn;
  608         cn_t           *cl;
  609         u_long          cnt;
  610         cn_t            prev;
  611         cn_t            tmp;
  612 
  613         off = 0;
  614         cnt = 0;
  615         i = 0;
  616         while (run[off]) {
  617                 off += (run[off] & 0xF) + ((run[off] >> 4) & 0xF) + 1;
  618                 cnt++;
  619         }
  620         MALLOC(cn, cn_t *, cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
  621         MALLOC(cl, cn_t *, cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
  622 
  623         off = 0;
  624         cnt = 0;
  625         prev = 0;
  626         while (run[off]) {
  627 
  628                 sz = run[off++];
  629                 cl[cnt] = 0;
  630 
  631                 for (i = 0; i < (sz & 0xF); i++)
  632                         cl[cnt] += (u_int32_t) run[off++] << (i << 3);
  633 
  634                 sz >>= 4;
  635                 if (run[off + sz - 1] & 0x80) {
  636                         tmp = ((u_int64_t) - 1) << (sz << 3);
  637                         for (i = 0; i < sz; i++)
  638                                 tmp |= (u_int64_t) run[off++] << (i << 3);
  639                 } else {
  640                         tmp = 0;
  641                         for (i = 0; i < sz; i++)
  642                                 tmp |= (u_int64_t) run[off++] << (i << 3);
  643                 }
  644                 if (tmp)
  645                         prev = cn[cnt] = prev + tmp;
  646                 else
  647                         cn[cnt] = tmp;
  648 
  649                 cnt++;
  650         }
  651         *rcnp = cn;
  652         *rclp = cl;
  653         *rcntp = cnt;
  654         return (0);
  655 }
  656 
  657 /*
  658  * Compare unicode and ascii string case insens.
  659  */
  660 static int
  661 ntfs_uastricmp(ntmp, ustr, ustrlen, astr, astrlen)
  662         struct ntfsmount *ntmp;
  663         const wchar *ustr;
  664         size_t ustrlen;
  665         const char *astr;
  666         size_t astrlen;
  667 {
  668         size_t             i;
  669         int             res;
  670 
  671         /*
  672          * XXX We use NTFS_82U(NTFS_U28(c)) to get rid of unicode
  673          * symbols not covered by translation table
  674          */
  675         for (i = 0; i < ustrlen && i < astrlen; i++) {
  676                 res = ((int) NTFS_TOUPPER(NTFS_82U(NTFS_U28(ustr[i])))) -
  677                         ((int)NTFS_TOUPPER(NTFS_82U(astr[i])));
  678                 if (res)
  679                         return res;
  680         }
  681         return (ustrlen - astrlen);
  682 }
  683 
  684 /*
  685  * Compare unicode and ascii string case sens.
  686  */
  687 static int
  688 ntfs_uastrcmp(ntmp, ustr, ustrlen, astr, astrlen)
  689         struct ntfsmount *ntmp;
  690         const wchar *ustr;
  691         size_t ustrlen;
  692         const char *astr;
  693         size_t astrlen;
  694 {
  695         size_t             i;
  696         int             res;
  697 
  698         for (i = 0; (i < ustrlen) && (i < astrlen); i++) {
  699                 res = (int) (((char)NTFS_U28(ustr[i])) - astr[i]);
  700                 if (res)
  701                         return res;
  702         }
  703         return (ustrlen - astrlen);
  704 }
  705 
  706 /* 
  707  * Search fnode in ntnode, if not found allocate and preinitialize.
  708  *
  709  * ntnode should be locked on entry.
  710  */
  711 int
  712 ntfs_fget(
  713         struct ntfsmount *ntmp,
  714         struct ntnode *ip,
  715         int attrtype,
  716         char *attrname,
  717         struct fnode **fpp)
  718 {
  719         struct fnode *fp;
  720 
  721         dprintf(("ntfs_fget: ino: %d, attrtype: 0x%x, attrname: %s\n",
  722                 ip->i_number,attrtype, attrname?attrname:""));
  723         *fpp = NULL;
  724         LIST_FOREACH(fp, &ip->i_fnlist, f_fnlist){
  725                 dprintf(("ntfs_fget: fnode: attrtype: %d, attrname: %s\n",
  726                         fp->f_attrtype, fp->f_attrname?fp->f_attrname:""));
  727 
  728                 if ((attrtype == fp->f_attrtype) && 
  729                     ((!attrname && !fp->f_attrname) ||
  730                      (attrname && fp->f_attrname &&
  731                       !strcmp(attrname,fp->f_attrname)))){
  732                         dprintf(("ntfs_fget: found existed: %p\n",fp));
  733                         *fpp = fp;
  734                 }
  735         }
  736 
  737         if (*fpp)
  738                 return (0);
  739 
  740         MALLOC(fp, struct fnode *, sizeof(struct fnode), M_NTFSFNODE,
  741                 M_WAITOK | M_ZERO);
  742         dprintf(("ntfs_fget: allocating fnode: %p\n",fp));
  743 
  744         fp->f_ip = ip;
  745         if (attrname) {
  746                 fp->f_flag |= FN_AATTRNAME;
  747                 MALLOC(fp->f_attrname, char *, strlen(attrname)+1, M_TEMP, M_WAITOK);
  748                 strcpy(fp->f_attrname, attrname);
  749         } else
  750                 fp->f_attrname = NULL;
  751         fp->f_attrtype = attrtype;
  752 
  753         ntfs_ntref(ip);
  754 
  755         LIST_INSERT_HEAD(&ip->i_fnlist, fp, f_fnlist);
  756 
  757         *fpp = fp;
  758 
  759         return (0);
  760 }
  761 
  762 /*
  763  * Deallocate fnode, remove it from ntnode's fnode list.
  764  *
  765  * ntnode should be locked.
  766  */
  767 void
  768 ntfs_frele(
  769         struct fnode *fp)
  770 {
  771         struct ntnode *ip = FTONT(fp);
  772 
  773         dprintf(("ntfs_frele: fnode: %p for %d: %p\n", fp, ip->i_number, ip));
  774 
  775         dprintf(("ntfs_frele: deallocating fnode\n"));
  776         LIST_REMOVE(fp,f_fnlist);
  777         if (fp->f_flag & FN_AATTRNAME)
  778                 FREE(fp->f_attrname, M_TEMP);
  779         if (fp->f_dirblbuf)
  780                 FREE(fp->f_dirblbuf, M_NTFSDIR);
  781         FREE(fp, M_NTFSFNODE);
  782         ntfs_ntrele(ip);
  783 }
  784 
  785 /*
  786  * Lookup attribute name in format: [[:$ATTR_TYPE]:$ATTR_NAME], 
  787  * $ATTR_TYPE is searched in attrdefs read from $AttrDefs.
  788  * If $ATTR_TYPE nott specifed, ATTR_A_DATA assumed.
  789  */
  790 static int
  791 ntfs_ntlookupattr(
  792                 struct ntfsmount * ntmp,
  793                 const char * name,
  794                 int namelen,
  795                 int *attrtype,
  796                 char **attrname)
  797 {
  798         const char *sys;
  799         size_t syslen, i;
  800         struct ntvattrdef *adp;
  801 
  802         if (namelen == 0)
  803                 return (0);
  804 
  805         if (name[0] == '$') {
  806                 sys = name;
  807                 for (syslen = 0; syslen < namelen; syslen++) {
  808                         if(sys[syslen] == ':') {
  809                                 name++;
  810                                 namelen--;
  811                                 break;
  812                         }
  813                 }
  814                 name += syslen;
  815                 namelen -= syslen;
  816 
  817                 adp = ntmp->ntm_ad;
  818                 for (i = 0; i < ntmp->ntm_adnum; i++, adp++){
  819                         if (syslen != adp->ad_namelen || 
  820                            strncmp(sys, adp->ad_name, syslen) != 0)
  821                                 continue;
  822 
  823                         *attrtype = adp->ad_type;
  824                         goto out;
  825                 }
  826                 return (ENOENT);
  827         } else
  828                 *attrtype = NTFS_A_DATA;
  829 
  830     out:
  831         if (namelen) {
  832                 MALLOC((*attrname), char *, namelen, M_TEMP, M_WAITOK);
  833                 memcpy((*attrname), name, namelen);
  834                 (*attrname)[namelen] = '\0';
  835         }
  836 
  837         return (0);
  838 }
  839 
  840 /*
  841  * Lookup specifed node for filename, matching cnp,
  842  * return fnode filled.
  843  */
  844 int
  845 ntfs_ntlookupfile(
  846               struct ntfsmount * ntmp,
  847               struct vnode * vp,
  848               struct componentname * cnp,
  849               struct vnode ** vpp)
  850 {
  851         struct fnode   *fp = VTOF(vp);
  852         struct ntnode  *ip = FTONT(fp);
  853         struct ntvattr *vap;    /* Root attribute */
  854         cn_t            cn;     /* VCN in current attribute */
  855         caddr_t         rdbuf;  /* Buffer to read directory's blocks  */
  856         u_int32_t       blsize;
  857         u_int32_t       rdsize; /* Length of data to read from current block */
  858         struct attr_indexentry *iep;
  859         int             error, res, anamelen, fnamelen;
  860         const char     *fname,*aname;
  861         u_int32_t       aoff;
  862         int attrtype = NTFS_A_DATA;
  863         char *attrname = NULL;
  864         struct fnode   *nfp;
  865         struct vnode   *nvp;
  866         enum vtype      f_type;
  867 
  868         error = ntfs_ntget(ip);
  869         if (error)
  870                 return (error);
  871 
  872         error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
  873         if (error || (vap->va_flag & NTFS_AF_INRUN))
  874                 return (ENOTDIR);
  875 
  876         blsize = vap->va_a_iroot->ir_size;
  877         rdsize = vap->va_datalen;
  878 
  879         /*
  880          * Divide file name into: foofilefoofilefoofile[:attrspec]
  881          * Store like this:       fname:fnamelen       [aname:anamelen]
  882          */
  883         fname = cnp->cn_nameptr;
  884         aname = NULL;
  885         anamelen = 0;
  886         for (fnamelen = 0; fnamelen < cnp->cn_namelen; fnamelen++)
  887                 if(fname[fnamelen] == ':') {
  888                         aname = fname + fnamelen + 1;
  889                         anamelen = cnp->cn_namelen - fnamelen - 1;
  890                         dprintf(("ntfs_ntlookupfile: %s (%d), attr: %s (%d)\n",
  891                                 fname, fnamelen, aname, anamelen));
  892                         break;
  893                 }
  894 
  895         dprintf(("ntfs_ntlookupfile: blksz: %d, rdsz: %d\n", blsize, rdsize));
  896 
  897         MALLOC(rdbuf, caddr_t, blsize, M_TEMP, M_WAITOK);
  898 
  899         error = ntfs_readattr(ntmp, ip, NTFS_A_INDXROOT, "$I30",
  900                                0, rdsize, rdbuf, NULL);
  901         if (error)
  902                 goto fail;
  903 
  904         aoff = sizeof(struct attr_indexroot);
  905 
  906         do {
  907                 iep = (struct attr_indexentry *) (rdbuf + aoff);
  908 
  909                 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
  910                         aoff += iep->reclen,
  911                         iep = (struct attr_indexentry *) (rdbuf + aoff))
  912                 {
  913                         ddprintf(("scan: %d, %d\n",
  914                                   (u_int32_t) iep->ie_number,
  915                                   (u_int32_t) iep->ie_fnametype));
  916 
  917                         /* check the name - the case-insensitible check
  918                          * has to come first, to break from this for loop
  919                          * if needed, so we can dive correctly */
  920                         res = NTFS_UASTRICMP(iep->ie_fname, iep->ie_fnamelen,
  921                                 fname, fnamelen);
  922                         if (res > 0) break;
  923                         if (res < 0) continue;
  924 
  925                         if (iep->ie_fnametype == 0 ||
  926                             !(ntmp->ntm_flag & NTFS_MFLAG_CASEINS))
  927                         {
  928                                 res = NTFS_UASTRCMP(iep->ie_fname,
  929                                         iep->ie_fnamelen, fname, fnamelen);
  930                                 if (res != 0) continue;
  931                         }
  932 
  933                         if (aname) {
  934                                 error = ntfs_ntlookupattr(ntmp,
  935                                         aname, anamelen,
  936                                         &attrtype, &attrname);
  937                                 if (error)
  938                                         goto fail;
  939                         }
  940 
  941                         /* Check if we've found ourself */
  942                         if ((iep->ie_number == ip->i_number) &&
  943                             (attrtype == fp->f_attrtype) &&
  944                             ((!attrname && !fp->f_attrname) ||
  945                              (attrname && fp->f_attrname &&
  946                               !strcmp(attrname, fp->f_attrname))))
  947                         {
  948                                 VREF(vp);
  949                                 *vpp = vp;
  950                                 error = 0;
  951                                 goto fail;
  952                         }
  953 
  954                         /* vget node, but don't load it */
  955                         error = ntfs_vgetex(ntmp->ntm_mountp,
  956                                    iep->ie_number, attrtype, attrname,
  957                                    LK_EXCLUSIVE, VG_DONTLOADIN | VG_DONTVALIDFN,
  958                                    curthread, &nvp);
  959 
  960                         /* free the buffer returned by ntfs_ntlookupattr() */
  961                         if (attrname) {
  962                                 FREE(attrname, M_TEMP);
  963                                 attrname = NULL;
  964                         }
  965 
  966                         if (error)
  967                                 goto fail;
  968 
  969                         nfp = VTOF(nvp);
  970 
  971                         if (nfp->f_flag & FN_VALID) {
  972                                 *vpp = nvp;
  973                                 goto fail;
  974                         }
  975 
  976                         nfp->f_fflag = iep->ie_fflag;
  977                         nfp->f_pnumber = iep->ie_fpnumber;
  978                         nfp->f_times = iep->ie_ftimes;
  979 
  980                         if((nfp->f_fflag & NTFS_FFLAG_DIR) &&
  981                            (nfp->f_attrtype == NTFS_A_DATA) &&
  982                            (nfp->f_attrname == NULL))
  983                                 f_type = VDIR;  
  984                         else
  985                                 f_type = VREG;  
  986 
  987                         nvp->v_type = f_type;
  988 
  989                         if ((nfp->f_attrtype == NTFS_A_DATA) &&
  990                             (nfp->f_attrname == NULL))
  991                         {
  992                                 /* Opening default attribute */
  993                                 nfp->f_size = iep->ie_fsize;
  994                                 nfp->f_allocated = iep->ie_fallocated;
  995                                 nfp->f_flag |= FN_PRELOADED;
  996                         } else {
  997                                 error = ntfs_filesize(ntmp, nfp,
  998                                             &nfp->f_size, &nfp->f_allocated);
  999                                 if (error) {
 1000                                         vput(nvp);
 1001                                         goto fail;
 1002                                 }
 1003                         }
 1004 
 1005                         nfp->f_flag &= ~FN_VALID;
 1006                         *vpp = nvp;
 1007                         goto fail;
 1008                 }
 1009 
 1010                 /* Dive if possible */
 1011                 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) {
 1012                         dprintf(("ntfs_ntlookupfile: diving\n"));
 1013 
 1014                         cn = *(cn_t *) (rdbuf + aoff +
 1015                                         iep->reclen - sizeof(cn_t));
 1016                         rdsize = blsize;
 1017 
 1018                         error = ntfs_readattr(ntmp, ip, NTFS_A_INDX, "$I30",
 1019                                         ntfs_cntob(cn), rdsize, rdbuf, NULL);
 1020                         if (error)
 1021                                 goto fail;
 1022 
 1023                         error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
 1024                                                 rdbuf, rdsize);
 1025                         if (error)
 1026                                 goto fail;
 1027 
 1028                         aoff = (((struct attr_indexalloc *) rdbuf)->ia_hdrsize +
 1029                                 0x18);
 1030                 } else {
 1031                         dprintf(("ntfs_ntlookupfile: nowhere to dive :-(\n"));
 1032                         error = ENOENT;
 1033                         break;
 1034                 }
 1035         } while (1);
 1036 
 1037         dprintf(("finish\n"));
 1038 
 1039 fail:
 1040         if (attrname) FREE(attrname, M_TEMP);
 1041         ntfs_ntvattrrele(vap);
 1042         ntfs_ntput(ip);
 1043         FREE(rdbuf, M_TEMP);
 1044         return (error);
 1045 }
 1046 
 1047 /*
 1048  * Check if name type is permitted to show.
 1049  */
 1050 int
 1051 ntfs_isnamepermitted(
 1052                      struct ntfsmount * ntmp,
 1053                      struct attr_indexentry * iep)
 1054 {
 1055         if (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)
 1056                 return 1;
 1057 
 1058         switch (iep->ie_fnametype) {
 1059         case 2:
 1060                 ddprintf(("ntfs_isnamepermitted: skiped DOS name\n"));
 1061                 return 0;
 1062         case 0: case 1: case 3:
 1063                 return 1;
 1064         default:
 1065                 printf("ntfs_isnamepermitted: " \
 1066                        "WARNING! Unknown file name type: %d\n",
 1067                        iep->ie_fnametype);
 1068                 break;
 1069         }
 1070         return 0;
 1071 }
 1072 
 1073 /*
 1074  * Read ntfs dir like stream of attr_indexentry, not like btree of them.
 1075  * This is done by scaning $BITMAP:$I30 for busy clusters and reading them.
 1076  * Ofcouse $INDEX_ROOT:$I30 is read before. Last read values are stored in
 1077  * fnode, so we can skip toward record number num almost immediatly.
 1078  * Anyway this is rather slow routine. The problem is that we don't know
 1079  * how many records are there in $INDEX_ALLOCATION:$I30 block.
 1080  */
 1081 int
 1082 ntfs_ntreaddir(
 1083                struct ntfsmount * ntmp,
 1084                struct fnode * fp,
 1085                u_int32_t num,
 1086                struct attr_indexentry ** riepp)
 1087 {
 1088         struct ntnode  *ip = FTONT(fp);
 1089         struct ntvattr *vap = NULL;     /* IndexRoot attribute */
 1090         struct ntvattr *bmvap = NULL;   /* BitMap attribute */
 1091         struct ntvattr *iavap = NULL;   /* IndexAllocation attribute */
 1092         caddr_t         rdbuf;          /* Buffer to read directory's blocks  */
 1093         u_char         *bmp = NULL;     /* Bitmap */
 1094         u_int32_t       blsize;         /* Index allocation size (2048) */
 1095         u_int32_t       rdsize;         /* Length of data to read */
 1096         u_int32_t       attrnum;        /* Current attribute type */
 1097         u_int32_t       cpbl = 1;       /* Clusters per directory block */
 1098         u_int32_t       blnum;
 1099         struct attr_indexentry *iep;
 1100         int             error = ENOENT;
 1101         u_int32_t       aoff, cnum;
 1102 
 1103         dprintf(("ntfs_ntreaddir: read ino: %d, num: %d\n", ip->i_number, num));
 1104         error = ntfs_ntget(ip);
 1105         if (error)
 1106                 return (error);
 1107 
 1108         error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
 1109         if (error)
 1110                 return (ENOTDIR);
 1111 
 1112         if (fp->f_dirblbuf == NULL) {
 1113                 fp->f_dirblsz = vap->va_a_iroot->ir_size;
 1114                 MALLOC(fp->f_dirblbuf, caddr_t,
 1115                        max(vap->va_datalen,fp->f_dirblsz), M_NTFSDIR, M_WAITOK);
 1116         }
 1117 
 1118         blsize = fp->f_dirblsz;
 1119         rdbuf = fp->f_dirblbuf;
 1120 
 1121         dprintf(("ntfs_ntreaddir: rdbuf: 0x%p, blsize: %d\n", rdbuf, blsize));
 1122 
 1123         if (vap->va_a_iroot->ir_flag & NTFS_IRFLAG_INDXALLOC) {
 1124                 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXBITMAP, "$I30",
 1125                                         0, &bmvap);
 1126                 if (error) {
 1127                         error = ENOTDIR;
 1128                         goto fail;
 1129                 }
 1130                 MALLOC(bmp, u_char *, bmvap->va_datalen, M_TEMP, M_WAITOK);
 1131                 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 0,
 1132                                        bmvap->va_datalen, bmp, NULL);
 1133                 if (error)
 1134                         goto fail;
 1135 
 1136                 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDX, "$I30",
 1137                                         0, &iavap);
 1138                 if (error) {
 1139                         error = ENOTDIR;
 1140                         goto fail;
 1141                 }
 1142                 cpbl = ntfs_btocn(blsize + ntfs_cntob(1) - 1);
 1143                 dprintf(("ntfs_ntreaddir: indexalloc: %d, cpbl: %d\n",
 1144                          iavap->va_datalen, cpbl));
 1145         } else {
 1146                 dprintf(("ntfs_ntreadidir: w/o BitMap and IndexAllocation\n"));
 1147                 iavap = bmvap = NULL;
 1148                 bmp = NULL;
 1149         }
 1150 
 1151         /* Try use previous values */
 1152         if ((fp->f_lastdnum < num) && (fp->f_lastdnum != 0)) {
 1153                 attrnum = fp->f_lastdattr;
 1154                 aoff = fp->f_lastdoff;
 1155                 blnum = fp->f_lastdblnum;
 1156                 cnum = fp->f_lastdnum;
 1157         } else {
 1158                 attrnum = NTFS_A_INDXROOT;
 1159                 aoff = sizeof(struct attr_indexroot);
 1160                 blnum = 0;
 1161                 cnum = 0;
 1162         }
 1163 
 1164         do {
 1165                 dprintf(("ntfs_ntreaddir: scan: 0x%x, %d, %d, %d, %d\n",
 1166                          attrnum, (u_int32_t) blnum, cnum, num, aoff));
 1167                 rdsize = (attrnum == NTFS_A_INDXROOT) ? vap->va_datalen : blsize;
 1168                 error = ntfs_readattr(ntmp, ip, attrnum, "$I30",
 1169                                 ntfs_cntob(blnum * cpbl), rdsize, rdbuf, NULL);
 1170                 if (error)
 1171                         goto fail;
 1172 
 1173                 if (attrnum == NTFS_A_INDX) {
 1174                         error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
 1175                                                 rdbuf, rdsize);
 1176                         if (error)
 1177                                 goto fail;
 1178                 }
 1179                 if (aoff == 0)
 1180                         aoff = (attrnum == NTFS_A_INDX) ?
 1181                                 (0x18 + ((struct attr_indexalloc *) rdbuf)->ia_hdrsize) :
 1182                                 sizeof(struct attr_indexroot);
 1183 
 1184                 iep = (struct attr_indexentry *) (rdbuf + aoff);
 1185                 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
 1186                         aoff += iep->reclen,
 1187                         iep = (struct attr_indexentry *) (rdbuf + aoff))
 1188                 {
 1189                         if (!ntfs_isnamepermitted(ntmp, iep)) continue;
 1190 
 1191                         if (cnum >= num) {
 1192                                 fp->f_lastdnum = cnum;
 1193                                 fp->f_lastdoff = aoff;
 1194                                 fp->f_lastdblnum = blnum;
 1195                                 fp->f_lastdattr = attrnum;
 1196 
 1197                                 *riepp = iep;
 1198 
 1199                                 error = 0;
 1200                                 goto fail;
 1201                         }
 1202                         cnum++;
 1203                 }
 1204 
 1205                 if (iavap) {
 1206                         if (attrnum == NTFS_A_INDXROOT)
 1207                                 blnum = 0;
 1208                         else
 1209                                 blnum++;
 1210 
 1211                         while (ntfs_cntob(blnum * cpbl) < iavap->va_datalen) {
 1212                                 if (bmp[blnum >> 3] & (1 << (blnum & 3)))
 1213                                         break;
 1214                                 blnum++;
 1215                         }
 1216 
 1217                         attrnum = NTFS_A_INDX;
 1218                         aoff = 0;
 1219                         if (ntfs_cntob(blnum * cpbl) >= iavap->va_datalen)
 1220                                 break;
 1221                         dprintf(("ntfs_ntreaddir: blnum: %d\n", (u_int32_t) blnum));
 1222                 }
 1223         } while (iavap);
 1224 
 1225         *riepp = NULL;
 1226         fp->f_lastdnum = 0;
 1227 
 1228 fail:
 1229         if (vap)
 1230                 ntfs_ntvattrrele(vap);
 1231         if (bmvap)
 1232                 ntfs_ntvattrrele(bmvap);
 1233         if (iavap)
 1234                 ntfs_ntvattrrele(iavap);
 1235         if (bmp)
 1236                 FREE(bmp, M_TEMP);
 1237         ntfs_ntput(ip);
 1238         return (error);
 1239 }
 1240 
 1241 /*
 1242  * Convert NTFS times that are in 100 ns units and begins from
 1243  * 1601 Jan 1 into unix times.
 1244  */
 1245 struct timespec
 1246 ntfs_nttimetounix(
 1247                   u_int64_t nt)
 1248 {
 1249         struct timespec t;
 1250 
 1251         /* WindowNT times are in 100 ns and from 1601 Jan 1 */
 1252         t.tv_nsec = (nt % (1000 * 1000 * 10)) * 100;
 1253         t.tv_sec = nt / (1000 * 1000 * 10) -
 1254                 369LL * 365LL * 24LL * 60LL * 60LL -
 1255                 89LL * 1LL * 24LL * 60LL * 60LL;
 1256         return (t);
 1257 }
 1258 
 1259 /*
 1260  * Get file times from NTFS_A_NAME attribute.
 1261  */
 1262 int
 1263 ntfs_times(
 1264            struct ntfsmount * ntmp,
 1265            struct ntnode * ip,
 1266            ntfs_times_t * tm)
 1267 {
 1268         struct ntvattr *vap;
 1269         int             error;
 1270 
 1271         dprintf(("ntfs_times: ino: %d...\n", ip->i_number));
 1272 
 1273         error = ntfs_ntget(ip);
 1274         if (error)
 1275                 return (error);
 1276 
 1277         error = ntfs_ntvattrget(ntmp, ip, NTFS_A_NAME, NULL, 0, &vap);
 1278         if (error) {
 1279                 ntfs_ntput(ip);
 1280                 return (error);
 1281         }
 1282         *tm = vap->va_a_name->n_times;
 1283         ntfs_ntvattrrele(vap);
 1284         ntfs_ntput(ip);
 1285 
 1286         return (0);
 1287 }
 1288 
 1289 /*
 1290  * Get file sizes from corresponding attribute. 
 1291  * 
 1292  * ntnode under fnode should be locked.
 1293  */
 1294 int
 1295 ntfs_filesize(
 1296               struct ntfsmount * ntmp,
 1297               struct fnode * fp,
 1298               u_int64_t * size,
 1299               u_int64_t * bytes)
 1300 {
 1301         struct ntvattr *vap;
 1302         struct ntnode *ip = FTONT(fp);
 1303         u_int64_t       sz, bn;
 1304         int             error;
 1305 
 1306         dprintf(("ntfs_filesize: ino: %d\n", ip->i_number));
 1307 
 1308         error = ntfs_ntvattrget(ntmp, ip,
 1309                 fp->f_attrtype, fp->f_attrname, 0, &vap);
 1310         if (error)
 1311                 return (error);
 1312 
 1313         bn = vap->va_allocated;
 1314         sz = vap->va_datalen;
 1315 
 1316         dprintf(("ntfs_filesize: %d bytes (%d bytes allocated)\n",
 1317                 (u_int32_t) sz, (u_int32_t) bn));
 1318 
 1319         if (size)
 1320                 *size = sz;
 1321         if (bytes)
 1322                 *bytes = bn;
 1323 
 1324         ntfs_ntvattrrele(vap);
 1325 
 1326         return (0);
 1327 }
 1328 
 1329 /*
 1330  * This is one of write routine.
 1331  */
 1332 int
 1333 ntfs_writeattr_plain(
 1334         struct ntfsmount * ntmp,
 1335         struct ntnode * ip,
 1336         u_int32_t attrnum,      
 1337         char *attrname,
 1338         off_t roff,
 1339         size_t rsize,
 1340         void *rdata,
 1341         size_t * initp,
 1342         struct uio *uio)
 1343 {
 1344         size_t          init;
 1345         int             error = 0;
 1346         off_t           off = roff, left = rsize, towrite;
 1347         caddr_t         data = rdata;
 1348         struct ntvattr *vap;
 1349         *initp = 0;
 1350 
 1351         while (left) {
 1352                 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
 1353                                         ntfs_btocn(off), &vap);
 1354                 if (error)
 1355                         return (error);
 1356                 towrite = min(left, ntfs_cntob(vap->va_vcnend + 1) - off);
 1357                 ddprintf(("ntfs_writeattr_plain: o: %d, s: %d (%d - %d)\n",
 1358                          (u_int32_t) off, (u_int32_t) towrite,
 1359                          (u_int32_t) vap->va_vcnstart,
 1360                          (u_int32_t) vap->va_vcnend));
 1361                 error = ntfs_writentvattr_plain(ntmp, ip, vap,
 1362                                          off - ntfs_cntob(vap->va_vcnstart),
 1363                                          towrite, data, &init, uio);
 1364                 if (error) {
 1365                         printf("ntfs_writeattr_plain: " \
 1366                                "ntfs_writentvattr_plain failed: o: %d, s: %d\n",
 1367                                (u_int32_t) off, (u_int32_t) towrite);
 1368                         printf("ntfs_writeattr_plain: attrib: %d - %d\n",
 1369                                (u_int32_t) vap->va_vcnstart, 
 1370                                (u_int32_t) vap->va_vcnend);
 1371                         ntfs_ntvattrrele(vap);
 1372                         break;
 1373                 }
 1374                 ntfs_ntvattrrele(vap);
 1375                 left -= towrite;
 1376                 off += towrite;
 1377                 data = data + towrite;
 1378                 *initp += init;
 1379         }
 1380 
 1381         return (error);
 1382 }
 1383 
 1384 /*
 1385  * This is one of write routine.
 1386  *
 1387  * ntnode should be locked.
 1388  */
 1389 int
 1390 ntfs_writentvattr_plain(
 1391         struct ntfsmount * ntmp,
 1392         struct ntnode * ip,
 1393         struct ntvattr * vap,
 1394         off_t roff,
 1395         size_t rsize,
 1396         void *rdata,
 1397         size_t * initp,
 1398         struct uio *uio)
 1399 {
 1400         int             error = 0;
 1401         int             off;
 1402         int             cnt;
 1403         cn_t            ccn, ccl, cn, left, cl;
 1404         caddr_t         data = rdata;
 1405         struct buf     *bp;
 1406         size_t          tocopy;
 1407 
 1408         *initp = 0;
 1409 
 1410         if ((vap->va_flag & NTFS_AF_INRUN) == 0) {
 1411                 printf("ntfs_writevattr_plain: CAN'T WRITE RES. ATTRIBUTE\n");
 1412                 return ENOTTY;
 1413         }
 1414 
 1415         ddprintf(("ntfs_writentvattr_plain: data in run: %ld chains\n",
 1416                  vap->va_vruncnt));
 1417 
 1418         off = roff;
 1419         left = rsize;
 1420         ccl = 0;
 1421         ccn = 0;
 1422         cnt = 0;
 1423         for (; left && (cnt < vap->va_vruncnt); cnt++) {
 1424                 ccn = vap->va_vruncn[cnt];
 1425                 ccl = vap->va_vruncl[cnt];
 1426 
 1427                 ddprintf(("ntfs_writentvattr_plain: " \
 1428                          "left %d, cn: 0x%x, cl: %d, off: %d\n", \
 1429                          (u_int32_t) left, (u_int32_t) ccn, \
 1430                          (u_int32_t) ccl, (u_int32_t) off));
 1431 
 1432                 if (ntfs_cntob(ccl) < off) {
 1433                         off -= ntfs_cntob(ccl);
 1434                         cnt++;
 1435                         continue;
 1436                 }
 1437                 if (!ccn && ip->i_number != NTFS_BOOTINO)
 1438                         continue; /* XXX */
 1439 
 1440                 ccl -= ntfs_btocn(off);
 1441                 cn = ccn + ntfs_btocn(off);
 1442                 off = ntfs_btocnoff(off);
 1443 
 1444                 while (left && ccl) {
 1445                         tocopy = min(left,
 1446                                   min(ntfs_cntob(ccl) - off, MAXBSIZE - off));
 1447                         cl = ntfs_btocl(tocopy + off);
 1448                         ddprintf(("ntfs_writentvattr_plain: write: " \
 1449                                 "cn: 0x%x cl: %d, off: %d len: %d, left: %d\n",
 1450                                 (u_int32_t) cn, (u_int32_t) cl, 
 1451                                 (u_int32_t) off, (u_int32_t) tocopy, 
 1452                                 (u_int32_t) left));
 1453                         if ((off == 0) && (tocopy == ntfs_cntob(cl)))
 1454                         {
 1455                                 bp = getblk(ntmp->ntm_devvp, ntfs_cntobn(cn),
 1456                                             ntfs_cntob(cl), 0, 0, 0);
 1457                                 clrbuf(bp);
 1458                         } else {
 1459                                 error = bread(ntmp->ntm_devvp, ntfs_cntobn(cn),
 1460                                               ntfs_cntob(cl), NOCRED, &bp);
 1461                                 if (error) {
 1462                                         brelse(bp);
 1463                                         return (error);
 1464                                 }
 1465                         }
 1466                         if (uio)
 1467                                 uiomove(bp->b_data + off, tocopy, uio);
 1468                         else
 1469                                 memcpy(bp->b_data + off, data, tocopy);
 1470                         bawrite(bp);
 1471                         data = data + tocopy;
 1472                         *initp += tocopy;
 1473                         off = 0;
 1474                         left -= tocopy;
 1475                         cn += cl;
 1476                         ccl -= cl;
 1477                 }
 1478         }
 1479 
 1480         if (left) {
 1481                 printf("ntfs_writentvattr_plain: POSSIBLE RUN ERROR\n");
 1482                 error = EINVAL;
 1483         }
 1484 
 1485         return (error);
 1486 }
 1487 
 1488 /*
 1489  * This is one of read routines.
 1490  *
 1491  * ntnode should be locked.
 1492  */
 1493 int
 1494 ntfs_readntvattr_plain(
 1495         struct ntfsmount * ntmp,
 1496         struct ntnode * ip,
 1497         struct ntvattr * vap,
 1498         off_t roff,
 1499         size_t rsize,
 1500         void *rdata,
 1501         size_t * initp,
 1502         struct uio *uio)
 1503 {
 1504         int             error = 0;
 1505         int             off;
 1506 
 1507         *initp = 0;
 1508         if (vap->va_flag & NTFS_AF_INRUN) {
 1509                 int             cnt;
 1510                 cn_t            ccn, ccl, cn, left, cl;
 1511                 caddr_t         data = rdata;
 1512                 struct buf     *bp;
 1513                 size_t          tocopy;
 1514 
 1515                 ddprintf(("ntfs_readntvattr_plain: data in run: %ld chains\n",
 1516                          vap->va_vruncnt));
 1517 
 1518                 off = roff;
 1519                 left = rsize;
 1520                 ccl = 0;
 1521                 ccn = 0;
 1522                 cnt = 0;
 1523                 while (left && (cnt < vap->va_vruncnt)) {
 1524                         ccn = vap->va_vruncn[cnt];
 1525                         ccl = vap->va_vruncl[cnt];
 1526 
 1527                         ddprintf(("ntfs_readntvattr_plain: " \
 1528                                  "left %d, cn: 0x%x, cl: %d, off: %d\n", \
 1529                                  (u_int32_t) left, (u_int32_t) ccn, \
 1530                                  (u_int32_t) ccl, (u_int32_t) off));
 1531 
 1532                         if (ntfs_cntob(ccl) < off) {
 1533                                 off -= ntfs_cntob(ccl);
 1534                                 cnt++;
 1535                                 continue;
 1536                         }
 1537                         if (ccn || ip->i_number == NTFS_BOOTINO) {
 1538                                 ccl -= ntfs_btocn(off);
 1539                                 cn = ccn + ntfs_btocn(off);
 1540                                 off = ntfs_btocnoff(off);
 1541 
 1542                                 while (left && ccl) {
 1543                                         tocopy = min(left,
 1544                                                   min(ntfs_cntob(ccl) - off,
 1545                                                       MAXBSIZE - off));
 1546                                         cl = ntfs_btocl(tocopy + off);
 1547                                         ddprintf(("ntfs_readntvattr_plain: " \
 1548                                                 "read: cn: 0x%x cl: %d, " \
 1549                                                 "off: %d len: %d, left: %d\n",
 1550                                                 (u_int32_t) cn, 
 1551                                                 (u_int32_t) cl, 
 1552                                                 (u_int32_t) off, 
 1553                                                 (u_int32_t) tocopy, 
 1554                                                 (u_int32_t) left));
 1555                                         error = bread(ntmp->ntm_devvp,
 1556                                                       ntfs_cntobn(cn),
 1557                                                       ntfs_cntob(cl),
 1558                                                       NOCRED, &bp);
 1559                                         if (error) {
 1560                                                 brelse(bp);
 1561                                                 return (error);
 1562                                         }
 1563                                         if (uio) {
 1564                                                 uiomove(bp->b_data + off,
 1565                                                         tocopy, uio);
 1566                                         } else {
 1567                                                 memcpy(data, bp->b_data + off,
 1568                                                         tocopy);
 1569                                         }
 1570                                         brelse(bp);
 1571                                         data = data + tocopy;
 1572                                         *initp += tocopy;
 1573                                         off = 0;
 1574                                         left -= tocopy;
 1575                                         cn += cl;
 1576                                         ccl -= cl;
 1577                                 }
 1578                         } else {
 1579                                 tocopy = min(left, ntfs_cntob(ccl) - off);
 1580                                 ddprintf(("ntfs_readntvattr_plain: "
 1581                                         "hole: ccn: 0x%x ccl: %d, off: %d, " \
 1582                                         " len: %d, left: %d\n", 
 1583                                         (u_int32_t) ccn, (u_int32_t) ccl, 
 1584                                         (u_int32_t) off, (u_int32_t) tocopy, 
 1585                                         (u_int32_t) left));
 1586                                 left -= tocopy;
 1587                                 off = 0;
 1588                                 if (uio) {
 1589                                         size_t remains = tocopy;
 1590                                         for(; remains; remains++)
 1591                                                 uiomove("", 1, uio);
 1592                                 } else 
 1593                                         bzero(data, tocopy);
 1594                                 data = data + tocopy;
 1595                         }
 1596                         cnt++;
 1597                 }
 1598                 if (left) {
 1599                         printf("ntfs_readntvattr_plain: POSSIBLE RUN ERROR\n");
 1600                         error = E2BIG;
 1601                 }
 1602         } else {
 1603                 ddprintf(("ntfs_readnvattr_plain: data is in mft record\n"));
 1604                 if (uio) 
 1605                         uiomove(vap->va_datap + roff, rsize, uio);
 1606                 else
 1607                         memcpy(rdata, vap->va_datap + roff, rsize);
 1608                 *initp += rsize;
 1609         }
 1610 
 1611         return (error);
 1612 }
 1613 
 1614 /*
 1615  * This is one of read routines.
 1616  */
 1617 int
 1618 ntfs_readattr_plain(
 1619         struct ntfsmount * ntmp,
 1620         struct ntnode * ip,
 1621         u_int32_t attrnum,      
 1622         char *attrname,
 1623         off_t roff,
 1624         size_t rsize,
 1625         void *rdata,
 1626         size_t * initp,
 1627         struct uio *uio)
 1628 {
 1629         size_t          init;
 1630         int             error = 0;
 1631         off_t           off = roff, left = rsize, toread;
 1632         caddr_t         data = rdata;
 1633         struct ntvattr *vap;
 1634         *initp = 0;
 1635 
 1636         while (left) {
 1637                 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
 1638                                         ntfs_btocn(off), &vap);
 1639                 if (error)
 1640                         return (error);
 1641                 toread = min(left, ntfs_cntob(vap->va_vcnend + 1) - off);
 1642                 ddprintf(("ntfs_readattr_plain: o: %d, s: %d (%d - %d)\n",
 1643                          (u_int32_t) off, (u_int32_t) toread,
 1644                          (u_int32_t) vap->va_vcnstart,
 1645                          (u_int32_t) vap->va_vcnend));
 1646                 error = ntfs_readntvattr_plain(ntmp, ip, vap,
 1647                                          off - ntfs_cntob(vap->va_vcnstart),
 1648                                          toread, data, &init, uio);
 1649                 if (error) {
 1650                         printf("ntfs_readattr_plain: " \
 1651                                "ntfs_readntvattr_plain failed: o: %d, s: %d\n",
 1652                                (u_int32_t) off, (u_int32_t) toread);
 1653                         printf("ntfs_readattr_plain: attrib: %d - %d\n",
 1654                                (u_int32_t) vap->va_vcnstart, 
 1655                                (u_int32_t) vap->va_vcnend);
 1656                         ntfs_ntvattrrele(vap);
 1657                         break;
 1658                 }
 1659                 ntfs_ntvattrrele(vap);
 1660                 left -= toread;
 1661                 off += toread;
 1662                 data = data + toread;
 1663                 *initp += init;
 1664         }
 1665 
 1666         return (error);
 1667 }
 1668 
 1669 /*
 1670  * This is one of read routines.
 1671  */
 1672 int
 1673 ntfs_readattr(
 1674         struct ntfsmount * ntmp,
 1675         struct ntnode * ip,
 1676         u_int32_t attrnum,
 1677         char *attrname,
 1678         off_t roff,
 1679         size_t rsize,
 1680         void *rdata,
 1681         struct uio *uio)
 1682 {
 1683         int             error = 0;
 1684         struct ntvattr *vap;
 1685         size_t          init;
 1686 
 1687         ddprintf(("ntfs_readattr: reading %d: 0x%x, from %d size %d bytes\n",
 1688                ip->i_number, attrnum, (u_int32_t) roff, (u_int32_t) rsize));
 1689 
 1690         error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 0, &vap);
 1691         if (error)
 1692                 return (error);
 1693 
 1694         if ((roff > vap->va_datalen) ||
 1695             (roff + rsize > vap->va_datalen)) {
 1696                 ddprintf(("ntfs_readattr: offset too big\n"));
 1697                 ntfs_ntvattrrele(vap);
 1698                 return (E2BIG);
 1699         }
 1700         if (vap->va_compression && vap->va_compressalg) {
 1701                 u_int8_t       *cup;
 1702                 u_int8_t       *uup;
 1703                 off_t           off = roff, left = rsize, tocopy;
 1704                 caddr_t         data = rdata;
 1705                 cn_t            cn;
 1706 
 1707                 ddprintf(("ntfs_ntreadattr: compression: %d\n",
 1708                          vap->va_compressalg));
 1709 
 1710                 MALLOC(cup, u_int8_t *, ntfs_cntob(NTFS_COMPUNIT_CL),
 1711                        M_NTFSDECOMP, M_WAITOK);
 1712                 MALLOC(uup, u_int8_t *, ntfs_cntob(NTFS_COMPUNIT_CL),
 1713                        M_NTFSDECOMP, M_WAITOK);
 1714 
 1715                 cn = (ntfs_btocn(roff)) & (~(NTFS_COMPUNIT_CL - 1));
 1716                 off = roff - ntfs_cntob(cn);
 1717 
 1718                 while (left) {
 1719                         error = ntfs_readattr_plain(ntmp, ip, attrnum,
 1720                                                   attrname, ntfs_cntob(cn),
 1721                                                   ntfs_cntob(NTFS_COMPUNIT_CL),
 1722                                                   cup, &init, NULL);
 1723                         if (error)
 1724                                 break;
 1725 
 1726                         tocopy = min(left, ntfs_cntob(NTFS_COMPUNIT_CL) - off);
 1727 
 1728                         if (init == ntfs_cntob(NTFS_COMPUNIT_CL)) {
 1729                                 if (uio)
 1730                                         uiomove(cup + off, tocopy, uio);
 1731                                 else
 1732                                         memcpy(data, cup + off, tocopy);
 1733                         } else if (init == 0) {
 1734                                 if (uio) {
 1735                                         size_t remains = tocopy;
 1736                                         for(; remains; remains--)
 1737                                                 uiomove("", 1, uio);
 1738                                 }
 1739                                 else
 1740                                         bzero(data, tocopy);
 1741                         } else {
 1742                                 error = ntfs_uncompunit(ntmp, uup, cup);
 1743                                 if (error)
 1744                                         break;
 1745                                 if (uio)
 1746                                         uiomove(uup + off, tocopy, uio);
 1747                                 else
 1748                                         memcpy(data, uup + off, tocopy);
 1749                         }
 1750 
 1751                         left -= tocopy;
 1752                         data = data + tocopy;
 1753                         off += tocopy - ntfs_cntob(NTFS_COMPUNIT_CL);
 1754                         cn += NTFS_COMPUNIT_CL;
 1755                 }
 1756 
 1757                 FREE(uup, M_NTFSDECOMP);
 1758                 FREE(cup, M_NTFSDECOMP);
 1759         } else
 1760                 error = ntfs_readattr_plain(ntmp, ip, attrnum, attrname,
 1761                                              roff, rsize, rdata, &init, uio);
 1762         ntfs_ntvattrrele(vap);
 1763         return (error);
 1764 }
 1765 
 1766 #if UNUSED_CODE
 1767 int
 1768 ntfs_parserun(
 1769               cn_t * cn,
 1770               cn_t * cl,
 1771               u_int8_t * run,
 1772               u_long len,
 1773               u_long *off)
 1774 {
 1775         u_int8_t        sz;
 1776         int             i;
 1777 
 1778         if (NULL == run) {
 1779                 printf("ntfs_parsetun: run == NULL\n");
 1780                 return (EINVAL);
 1781         }
 1782         sz = run[(*off)++];
 1783         if (0 == sz) {
 1784                 printf("ntfs_parserun: trying to go out of run\n");
 1785                 return (E2BIG);
 1786         }
 1787         *cl = 0;
 1788         if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
 1789                 printf("ntfs_parserun: " \
 1790                        "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
 1791                        sz, len, *off);
 1792                 return (EINVAL);
 1793         }
 1794         for (i = 0; i < (sz & 0xF); i++)
 1795                 *cl += (u_int32_t) run[(*off)++] << (i << 3);
 1796 
 1797         sz >>= 4;
 1798         if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
 1799                 printf("ntfs_parserun: " \
 1800                        "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
 1801                        sz, len, *off);
 1802                 return (EINVAL);
 1803         }
 1804         for (i = 0; i < (sz & 0xF); i++)
 1805                 *cn += (u_int32_t) run[(*off)++] << (i << 3);
 1806 
 1807         return (0);
 1808 }
 1809 #endif
 1810 
 1811 /*
 1812  * Process fixup routine on given buffer.
 1813  */
 1814 int
 1815 ntfs_procfixups(
 1816                 struct ntfsmount * ntmp,
 1817                 u_int32_t magic,
 1818                 caddr_t buf,
 1819                 size_t len)
 1820 {
 1821         struct fixuphdr *fhp = (struct fixuphdr *) buf;
 1822         int             i;
 1823         u_int16_t       fixup;
 1824         u_int16_t      *fxp;
 1825         u_int16_t      *cfxp;
 1826 
 1827         if (fhp->fh_magic != magic) {
 1828                 printf("ntfs_procfixups: magic doesn't match: %08x != %08x\n",
 1829                        fhp->fh_magic, magic);
 1830                 return (EINVAL);
 1831         }
 1832         if ((fhp->fh_fnum - 1) * ntmp->ntm_bps != len) {
 1833                 printf("ntfs_procfixups: " \
 1834                        "bad fixups number: %d for %ld bytes block\n", 
 1835                        fhp->fh_fnum, (long)len);        /* XXX printf kludge */
 1836                 return (EINVAL);
 1837         }
 1838         if (fhp->fh_foff >= ntmp->ntm_spc * ntmp->ntm_mftrecsz * ntmp->ntm_bps) {
 1839                 printf("ntfs_procfixups: invalid offset: %x", fhp->fh_foff);
 1840                 return (EINVAL);
 1841         }
 1842         fxp = (u_int16_t *) (buf + fhp->fh_foff);
 1843         cfxp = (u_int16_t *) (buf + ntmp->ntm_bps - 2);
 1844         fixup = *fxp++;
 1845         for (i = 1; i < fhp->fh_fnum; i++, fxp++) {
 1846                 if (*cfxp != fixup) {
 1847                         printf("ntfs_procfixups: fixup %d doesn't match\n", i);
 1848                         return (EINVAL);
 1849                 }
 1850                 *cfxp = *fxp;
 1851                 ((caddr_t) cfxp) += ntmp->ntm_bps;
 1852         }
 1853         return (0);
 1854 }
 1855 
 1856 #if UNUSED_CODE
 1857 int
 1858 ntfs_runtocn(
 1859              cn_t * cn, 
 1860              struct ntfsmount * ntmp,
 1861              u_int8_t * run,
 1862              u_long len,
 1863              cn_t vcn)
 1864 {
 1865         cn_t            ccn = 0;
 1866         cn_t            ccl = 0;
 1867         u_long          off = 0;
 1868         int             error = 0;
 1869 
 1870 #if NTFS_DEBUG
 1871         int             i;
 1872         printf("ntfs_runtocn: run: 0x%p, %ld bytes, vcn:%ld\n",
 1873                 run, len, (u_long) vcn);
 1874         printf("ntfs_runtocn: run: ");
 1875         for (i = 0; i < len; i++)
 1876                 printf("0x%02x ", run[i]);
 1877         printf("\n");
 1878 #endif
 1879 
 1880         if (NULL == run) {
 1881                 printf("ntfs_runtocn: run == NULL\n");
 1882                 return (EINVAL);
 1883         }
 1884         do {
 1885                 if (run[off] == 0) {
 1886                         printf("ntfs_runtocn: vcn too big\n");
 1887                         return (E2BIG);
 1888                 }
 1889                 vcn -= ccl;
 1890                 error = ntfs_parserun(&ccn, &ccl, run, len, &off);
 1891                 if (error) {
 1892                         printf("ntfs_runtocn: ntfs_parserun failed\n");
 1893                         return (error);
 1894                 }
 1895         } while (ccl <= vcn);
 1896         *cn = ccn + vcn;
 1897         return (0);
 1898 }
 1899 #endif
 1900 
 1901 /*
 1902  * this initializes toupper table & dependant variables to be ready for
 1903  * later work
 1904  */
 1905 void
 1906 ntfs_toupper_init()
 1907 {
 1908         ntfs_toupper_tab = (wchar *) NULL;
 1909         lockinit(&ntfs_toupper_lock, PVFS, "ntfs_toupper", 0, 0);
 1910         ntfs_toupper_usecount = 0;
 1911 }
 1912 
 1913 void
 1914 ntfs_toupper_destroy(void)
 1915 {
 1916 
 1917         lockdestroy(&ntfs_toupper_lock);
 1918 }
 1919 
 1920 /*
 1921  * if the ntfs_toupper_tab[] is filled already, just raise use count;
 1922  * otherwise read the data from the filesystem we are currently mounting
 1923  */
 1924 int
 1925 ntfs_toupper_use(mp, ntmp)
 1926         struct mount *mp;
 1927         struct ntfsmount *ntmp;
 1928 {
 1929         int error = 0;
 1930         struct vnode *vp;
 1931 
 1932         /* get exclusive access */
 1933         lockmgr(&ntfs_toupper_lock, LK_EXCLUSIVE, NULL, NULL);
 1934         
 1935         /* only read the translation data from a file if it hasn't been
 1936          * read already */
 1937         if (ntfs_toupper_tab)
 1938                 goto out;
 1939 
 1940         /*
 1941          * Read in Unicode lowercase -> uppercase translation file.
 1942          * XXX for now, just the first 256 entries are used anyway,
 1943          * so don't bother reading more
 1944          */
 1945         MALLOC(ntfs_toupper_tab, wchar *, 65536 * sizeof(wchar),
 1946                 M_NTFSRDATA, M_WAITOK);
 1947 
 1948         if ((error = VFS_VGET(mp, NTFS_UPCASEINO, LK_EXCLUSIVE, &vp)))
 1949                 goto out;
 1950         error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
 1951                         0, 65536*sizeof(wchar), (char *) ntfs_toupper_tab, NULL);
 1952         vput(vp);
 1953 
 1954     out:
 1955         ntfs_toupper_usecount++;
 1956         lockmgr(&ntfs_toupper_lock, LK_RELEASE, NULL, NULL);
 1957         return (error);
 1958 }
 1959 
 1960 /*
 1961  * lower the use count and if it reaches zero, free the memory
 1962  * tied by toupper table
 1963  */
 1964 void
 1965 ntfs_toupper_unuse()
 1966 {
 1967         /* get exclusive access */
 1968         lockmgr(&ntfs_toupper_lock, LK_EXCLUSIVE, NULL, NULL);
 1969 
 1970         ntfs_toupper_usecount--;
 1971         if (ntfs_toupper_usecount == 0) {
 1972                 FREE(ntfs_toupper_tab, M_NTFSRDATA);
 1973                 ntfs_toupper_tab = NULL;
 1974         }
 1975 #ifdef DIAGNOSTIC
 1976         else if (ntfs_toupper_usecount < 0) {
 1977                 panic("ntfs_toupper_unuse(): use count negative: %d\n",
 1978                         ntfs_toupper_usecount);
 1979         }
 1980 #endif
 1981         
 1982         /* release the lock */
 1983         lockmgr(&ntfs_toupper_lock, LK_RELEASE, NULL, NULL);
 1984 } 
 1985 
 1986 int
 1987 ntfs_u28_init(
 1988         struct ntfsmount *ntmp,
 1989         wchar *u2w)
 1990 {
 1991         char ** u28;
 1992         int i, j, h, l;
 1993 
 1994         MALLOC(u28, char **, 256 * sizeof(char*), M_TEMP, M_WAITOK | M_ZERO);
 1995 
 1996         for (i=0; i<256; i++) {
 1997                 h = (u2w[i] >> 8) & 0xFF;
 1998                 l = (u2w[i]) &0xFF;
 1999 
 2000                 if (u28[h] == NULL) {
 2001                         MALLOC(u28[h], char *, 256 * sizeof(char), M_TEMP, M_WAITOK);
 2002                         for (j=0; j<256; j++)
 2003                                 u28[h][j] = '_';
 2004                 }
 2005 
 2006                 u28[h][l] = i & 0xFF;
 2007         }
 2008 
 2009         ntmp->ntm_u28 = u28;
 2010 
 2011         return (0);
 2012 }
 2013 
 2014 int
 2015 ntfs_u28_uninit(struct ntfsmount *ntmp)
 2016 {
 2017         char ** u28;
 2018         int i;
 2019 
 2020         if (ntmp->ntm_u28 == NULL)
 2021                 return (0);
 2022 
 2023         u28 = ntmp->ntm_u28;
 2024 
 2025         for (i=0; i<256; i++)
 2026                 if (u28[i] != NULL)
 2027                         FREE(u28[i], M_TEMP);
 2028 
 2029         FREE(u28, M_TEMP);
 2030 
 2031         return (0);
 2032 }
 2033 
 2034 int
 2035 ntfs_82u_init(
 2036         struct ntfsmount *ntmp,
 2037         u_int16_t *u2w)
 2038 {
 2039         wchar * _82u;
 2040         int i;
 2041 
 2042         MALLOC(_82u, wchar *, 256 * sizeof(wchar), M_TEMP, M_WAITOK);
 2043 
 2044         if (u2w == NULL) {
 2045                 for (i=0; i<256; i++)
 2046                         _82u[i] = i;
 2047         } else {
 2048                 for (i=0; i<128; i++)
 2049                         _82u[i] = i;
 2050                 for (i=0; i<128; i++)
 2051                         _82u[i+128] = u2w[i];
 2052         }
 2053 
 2054         ntmp->ntm_82u = _82u;
 2055 
 2056         return (0);
 2057 }
 2058 
 2059 int
 2060 ntfs_82u_uninit(struct ntfsmount *ntmp)
 2061 {
 2062         FREE(ntmp->ntm_82u, M_TEMP);
 2063         return (0);
 2064 }
 2065 
 2066 /*
 2067  * maps the Unicode char to 8bit equivalent
 2068  * XXX currently only gets lower 8bit from the Unicode char
 2069  * and substitutes a '_' for it if the result would be '\0';
 2070  * something better has to be definitely though out
 2071  */
 2072 char
 2073 ntfs_u28(
 2074         struct ntfsmount *ntmp, 
 2075         wchar wc)
 2076 {
 2077         char * p;
 2078 
 2079         p = ntmp->ntm_u28[(wc>>8)&0xFF];
 2080         if (p == NULL)
 2081                 return ('_');
 2082         return (p[wc&0xFF]);
 2083 }
 2084 

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