The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
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/6.0/sys/fs/ntfs/ntfs_subr.c 145939 2005-05-06 00:15:57Z robert $
   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 #include <sys/iconv.h>
   44 
   45 /* #define NTFS_DEBUG 1 */
   46 #include <fs/ntfs/ntfs.h>
   47 #include <fs/ntfs/ntfsmount.h>
   48 #include <fs/ntfs/ntfs_inode.h>
   49 #include <fs/ntfs/ntfs_vfsops.h>
   50 #include <fs/ntfs/ntfs_subr.h>
   51 #include <fs/ntfs/ntfs_compr.h>
   52 #include <fs/ntfs/ntfs_ihash.h>
   53 
   54 MALLOC_DEFINE(M_NTFSNTVATTR, "NTFS vattr", "NTFS file attribute information");
   55 MALLOC_DEFINE(M_NTFSRDATA, "NTFS res data", "NTFS resident data");
   56 MALLOC_DEFINE(M_NTFSRUN, "NTFS vrun", "NTFS vrun storage");
   57 MALLOC_DEFINE(M_NTFSDECOMP, "NTFS decomp", "NTFS decompression temporary");
   58 
   59 static int ntfs_ntlookupattr(struct ntfsmount *, const char *, int, int *, char **);
   60 static int ntfs_findvattr(struct ntfsmount *, struct ntnode *, struct ntvattr **, struct ntvattr **, u_int32_t, const char *, size_t, cn_t);
   61 static int ntfs_uastricmp(struct ntfsmount *, const wchar *, size_t, const char *, size_t);
   62 static int ntfs_uastrcmp(struct ntfsmount *, const wchar *, size_t, const char *, size_t);
   63 
   64 /* table for mapping Unicode chars into uppercase; it's filled upon first
   65  * ntfs mount, freed upon last ntfs umount */
   66 static wchar *ntfs_toupper_tab;
   67 #define NTFS_TOUPPER(ch)        (ntfs_toupper_tab[(ch)])
   68 static struct lock ntfs_toupper_lock;
   69 static signed int ntfs_toupper_usecount;
   70 
   71 struct iconv_functions *ntfs_iconv = NULL;
   72 
   73 /* support macro for ntfs_ntvattrget() */
   74 #define NTFS_AALPCMP(aalp,type,name,namelen) (                          \
   75   (aalp->al_type == type) && (aalp->al_namelen == namelen) &&           \
   76   !NTFS_UASTRCMP(aalp->al_name,aalp->al_namelen,name,namelen) )
   77 
   78 /*
   79  * 
   80  */
   81 int
   82 ntfs_ntvattrrele(vap)
   83         struct ntvattr * vap;
   84 {
   85         dprintf(("ntfs_ntvattrrele: ino: %d, type: 0x%x\n",
   86                  vap->va_ip->i_number, vap->va_type));
   87 
   88         ntfs_ntrele(vap->va_ip);
   89 
   90         return (0);
   91 }
   92 
   93 /*
   94  * find the attribute in the ntnode
   95  */
   96 static int
   97 ntfs_findvattr(ntmp, ip, lvapp, vapp, type, name, namelen, vcn)
   98         struct ntfsmount *ntmp;
   99         struct ntnode *ip;
  100         struct ntvattr **lvapp, **vapp;
  101         u_int32_t type;
  102         const char *name;
  103         size_t namelen;
  104         cn_t vcn;
  105 {
  106         int error;
  107         struct ntvattr *vap;
  108 
  109         if((ip->i_flag & IN_LOADED) == 0) {
  110                 dprintf(("ntfs_findvattr: node not loaded, ino: %d\n",
  111                        ip->i_number));
  112                 error = ntfs_loadntnode(ntmp,ip);
  113                 if (error) {
  114                         printf("ntfs_findvattr: FAILED TO LOAD INO: %d\n",
  115                                ip->i_number);
  116                         return (error);
  117                 }
  118         }
  119 
  120         *lvapp = NULL;
  121         *vapp = NULL;
  122         LIST_FOREACH(vap, &ip->i_valist, va_list) {
  123                 ddprintf(("ntfs_findvattr: type: 0x%x, vcn: %d - %d\n", \
  124                           vap->va_type, (u_int32_t) vap->va_vcnstart, \
  125                           (u_int32_t) vap->va_vcnend));
  126                 if ((vap->va_type == type) &&
  127                     (vap->va_vcnstart <= vcn) && (vap->va_vcnend >= vcn) &&
  128                     (vap->va_namelen == namelen) &&
  129                     (strncmp(name, vap->va_name, namelen) == 0)) {
  130                         *vapp = vap;
  131                         ntfs_ntref(vap->va_ip);
  132                         return (0);
  133                 }
  134                 if (vap->va_type == NTFS_A_ATTRLIST)
  135                         *lvapp = vap;
  136         }
  137 
  138         return (-1);
  139 }
  140 
  141 /*
  142  * Search attribute specifed in ntnode (load ntnode if nessecary).
  143  * If not found but ATTR_A_ATTRLIST present, read it in and search throught.
  144  * VOP_VGET node needed, and lookup througth it's ntnode (load if nessesary).
  145  *
  146  * ntnode should be locked
  147  */
  148 int
  149 ntfs_ntvattrget(
  150                 struct ntfsmount * ntmp,
  151                 struct ntnode * ip,
  152                 u_int32_t type,
  153                 const char *name,
  154                 cn_t vcn,
  155                 struct ntvattr ** vapp)
  156 {
  157         struct ntvattr *lvap = NULL;
  158         struct attr_attrlist *aalp;
  159         struct attr_attrlist *nextaalp;
  160         struct vnode   *newvp;
  161         struct ntnode  *newip;
  162         caddr_t         alpool;
  163         size_t          namelen, len;
  164         int             error;
  165 
  166         *vapp = NULL;
  167 
  168         if (name) {
  169                 dprintf(("ntfs_ntvattrget: " \
  170                          "ino: %d, type: 0x%x, name: %s, vcn: %d\n", \
  171                          ip->i_number, type, name, (u_int32_t) vcn));
  172                 namelen = strlen(name);
  173         } else {
  174                 dprintf(("ntfs_ntvattrget: " \
  175                          "ino: %d, type: 0x%x, vcn: %d\n", \
  176                          ip->i_number, type, (u_int32_t) vcn));
  177                 name = "";
  178                 namelen = 0;
  179         }
  180 
  181         error = ntfs_findvattr(ntmp, ip, &lvap, vapp, type, name, namelen, vcn);
  182         if (error >= 0)
  183                 return (error);
  184 
  185         if (!lvap) {
  186                 dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: " \
  187                        "ino: %d, type: 0x%x, name: %s, vcn: %d\n", \
  188                        ip->i_number, type, name, (u_int32_t) vcn));
  189                 return (ENOENT);
  190         }
  191         /* Scan $ATTRIBUTE_LIST for requested attribute */
  192         len = lvap->va_datalen;
  193         MALLOC(alpool, caddr_t, len, M_TEMP, M_WAITOK);
  194         error = ntfs_readntvattr_plain(ntmp, ip, lvap, 0, len, alpool, &len,
  195                         NULL);
  196         if (error)
  197                 goto out;
  198 
  199         aalp = (struct attr_attrlist *) alpool;
  200         nextaalp = NULL;
  201 
  202         for(; len > 0; aalp = nextaalp) {
  203                 dprintf(("ntfs_ntvattrget: " \
  204                          "attrlist: ino: %d, attr: 0x%x, vcn: %d\n", \
  205                          aalp->al_inumber, aalp->al_type, \
  206                          (u_int32_t) aalp->al_vcnstart));
  207 
  208                 if (len > aalp->reclen) {
  209                         nextaalp = NTFS_NEXTREC(aalp, struct attr_attrlist *);
  210                 } else {
  211                         nextaalp = NULL;
  212                 }
  213                 len -= aalp->reclen;
  214 
  215                 if (!NTFS_AALPCMP(aalp, type, name, namelen) ||
  216                     (nextaalp && (nextaalp->al_vcnstart <= vcn) &&
  217                      NTFS_AALPCMP(nextaalp, type, name, namelen)))
  218                         continue;
  219 
  220                 dprintf(("ntfs_ntvattrget: attribute in ino: %d\n",
  221                                  aalp->al_inumber));
  222 
  223                 /* this is not a main record, so we can't use just plain
  224                    vget() */
  225                 error = ntfs_vgetex(ntmp->ntm_mountp, aalp->al_inumber,
  226                                 NTFS_A_DATA, NULL, LK_EXCLUSIVE,
  227                                 VG_EXT, curthread, &newvp);
  228                 if (error) {
  229                         printf("ntfs_ntvattrget: CAN'T VGET INO: %d\n",
  230                                aalp->al_inumber);
  231                         goto out;
  232                 }
  233                 newip = VTONT(newvp);
  234                 /* XXX have to lock ntnode */
  235                 error = ntfs_findvattr(ntmp, newip, &lvap, vapp,
  236                                 type, name, namelen, vcn);
  237                 vput(newvp);
  238                 if (error == 0)
  239                         goto out;
  240                 printf("ntfs_ntvattrget: ATTRLIST ERROR.\n");
  241                 break;
  242         }
  243         error = ENOENT;
  244 
  245         dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: " \
  246                "ino: %d, type: 0x%x, name: %.*s, vcn: %d\n", \
  247                ip->i_number, type, (int) namelen, name, (u_int32_t) vcn));
  248 out:
  249         FREE(alpool, M_TEMP);
  250         return (error);
  251 }
  252 
  253 /*
  254  * Read ntnode from disk, make ntvattr list.
  255  *
  256  * ntnode should be locked
  257  */
  258 int
  259 ntfs_loadntnode(
  260               struct ntfsmount * ntmp,
  261               struct ntnode * ip)
  262 {
  263         struct filerec  *mfrp;
  264         daddr_t         bn;
  265         int             error,off;
  266         struct attr    *ap;
  267         struct ntvattr *nvap;
  268 
  269         dprintf(("ntfs_loadntnode: loading ino: %d\n",ip->i_number));
  270 
  271         MALLOC(mfrp, struct filerec *, ntfs_bntob(ntmp->ntm_bpmftrec),
  272                M_TEMP, M_WAITOK);
  273 
  274         if (ip->i_number < NTFS_SYSNODESNUM) {
  275                 struct buf     *bp;
  276 
  277                 dprintf(("ntfs_loadntnode: read system node\n"));
  278 
  279                 bn = ntfs_cntobn(ntmp->ntm_mftcn) +
  280                         ntmp->ntm_bpmftrec * ip->i_number;
  281 
  282                 error = bread(ntmp->ntm_devvp,
  283                               bn, ntfs_bntob(ntmp->ntm_bpmftrec),
  284                               NOCRED, &bp);
  285                 if (error) {
  286                         printf("ntfs_loadntnode: BREAD FAILED\n");
  287                         brelse(bp);
  288                         goto out;
  289                 }
  290                 memcpy(mfrp, bp->b_data, ntfs_bntob(ntmp->ntm_bpmftrec));
  291                 bqrelse(bp);
  292         } else {
  293                 struct vnode   *vp;
  294 
  295                 vp = ntmp->ntm_sysvn[NTFS_MFTINO];
  296                 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
  297                                ip->i_number * ntfs_bntob(ntmp->ntm_bpmftrec),
  298                                ntfs_bntob(ntmp->ntm_bpmftrec), mfrp, NULL);
  299                 if (error) {
  300                         printf("ntfs_loadntnode: ntfs_readattr failed\n");
  301                         goto out;
  302                 }
  303         }
  304 
  305         /* Check if magic and fixups are correct */
  306         error = ntfs_procfixups(ntmp, NTFS_FILEMAGIC, (caddr_t)mfrp,
  307                                 ntfs_bntob(ntmp->ntm_bpmftrec));
  308         if (error) {
  309                 printf("ntfs_loadntnode: BAD MFT RECORD %d\n",
  310                        (u_int32_t) ip->i_number);
  311                 goto out;
  312         }
  313 
  314         dprintf(("ntfs_loadntnode: load attrs for ino: %d\n",ip->i_number));
  315         off = mfrp->fr_attroff;
  316         ap = (struct attr *) ((caddr_t)mfrp + off);
  317 
  318         LIST_INIT(&ip->i_valist);
  319         
  320         while (ap->a_hdr.a_type != -1) {
  321                 error = ntfs_attrtontvattr(ntmp, &nvap, ap);
  322                 if (error)
  323                         break;
  324                 nvap->va_ip = ip;
  325 
  326                 LIST_INSERT_HEAD(&ip->i_valist, nvap, va_list);
  327 
  328                 off += ap->a_hdr.reclen;
  329                 ap = (struct attr *) ((caddr_t)mfrp + off);
  330         }
  331         if (error) {
  332                 printf("ntfs_loadntnode: failed to load attr ino: %d\n",
  333                        ip->i_number);
  334                 goto out;
  335         }
  336 
  337         ip->i_mainrec = mfrp->fr_mainrec;
  338         ip->i_nlink = mfrp->fr_nlink;
  339         ip->i_frflag = mfrp->fr_flags;
  340 
  341         ip->i_flag |= IN_LOADED;
  342 
  343 out:
  344         FREE(mfrp, M_TEMP);
  345         return (error);
  346 }
  347                 
  348 /*
  349  * Routine locks ntnode and increase usecount, just opposite of
  350  * ntfs_ntput().
  351  */
  352 int
  353 ntfs_ntget(ip)
  354         struct ntnode *ip;
  355 {
  356         dprintf(("ntfs_ntget: get ntnode %d: %p, usecount: %d\n",
  357                 ip->i_number, ip, ip->i_usecount));
  358 
  359         mtx_lock(&ip->i_interlock);
  360         ip->i_usecount++;
  361         lockmgr(&ip->i_lock, LK_EXCLUSIVE | LK_INTERLOCK, &ip->i_interlock,
  362             NULL);
  363 
  364         return 0;
  365 }
  366 
  367 /*
  368  * Routine search ntnode in hash, if found: lock, inc usecount and return.
  369  * If not in hash allocate structure for ntnode, prefill it, lock,
  370  * inc count and return.
  371  *
  372  * ntnode returned locked
  373  */
  374 int
  375 ntfs_ntlookup(
  376            struct ntfsmount * ntmp,
  377            ino_t ino,
  378            struct ntnode ** ipp)
  379 {
  380         struct ntnode  *ip;
  381 
  382         dprintf(("ntfs_ntlookup: looking for ntnode %d\n", ino));
  383 
  384         do {
  385                 ip = ntfs_nthashlookup(ntmp->ntm_devvp->v_rdev, ino);
  386                 if (ip != NULL) {
  387                         ntfs_ntget(ip);
  388                         dprintf(("ntfs_ntlookup: ntnode %d: %p, usecount: %d\n",
  389                                 ino, ip, ip->i_usecount));
  390                         *ipp = ip;
  391                         return (0);
  392                 }
  393         } while (lockmgr(&ntfs_hashlock, LK_EXCLUSIVE | LK_SLEEPFAIL, NULL,
  394             NULL));
  395 
  396         MALLOC(ip, struct ntnode *, sizeof(struct ntnode), M_NTFSNTNODE,
  397                 M_WAITOK | M_ZERO);
  398         ddprintf(("ntfs_ntlookup: allocating ntnode: %d: %p\n", ino, ip));
  399 
  400         /* Generic initialization */
  401         ip->i_devvp = ntmp->ntm_devvp;
  402         ip->i_dev = ntmp->ntm_devvp->v_rdev;
  403         ip->i_number = ino;
  404         ip->i_mp = ntmp;
  405 
  406         LIST_INIT(&ip->i_fnlist);
  407         VREF(ip->i_devvp);
  408 
  409         /* init lock and lock the newborn ntnode */
  410         lockinit(&ip->i_lock, PINOD, "ntnode", 0, LK_EXCLUSIVE);
  411         mtx_init(&ip->i_interlock, "ntnode interlock", NULL, MTX_DEF);
  412         ntfs_ntget(ip);
  413 
  414         ntfs_nthashins(ip);
  415 
  416         lockmgr(&ntfs_hashlock, LK_RELEASE, NULL, NULL);
  417 
  418         *ipp = ip;
  419 
  420         dprintf(("ntfs_ntlookup: ntnode %d: %p, usecount: %d\n",
  421                 ino, ip, ip->i_usecount));
  422 
  423         return (0);
  424 }
  425 
  426 /*
  427  * Decrement usecount of ntnode and unlock it, if usecount reach zero,
  428  * deallocate ntnode.
  429  *
  430  * ntnode should be locked on entry, and unlocked on return.
  431  */
  432 void
  433 ntfs_ntput(ip)
  434         struct ntnode *ip;
  435 {
  436         struct ntvattr *vap;
  437 
  438         dprintf(("ntfs_ntput: rele ntnode %d: %p, usecount: %d\n",
  439                 ip->i_number, ip, ip->i_usecount));
  440 
  441         mtx_lock(&ip->i_interlock);
  442         ip->i_usecount--;
  443 
  444 #ifdef DIAGNOSTIC
  445         if (ip->i_usecount < 0) {
  446                 panic("ntfs_ntput: ino: %d usecount: %d \n",
  447                       ip->i_number,ip->i_usecount);
  448         }
  449 #endif
  450 
  451         if (ip->i_usecount > 0) {
  452                 lockmgr(&ip->i_lock, LK_RELEASE|LK_INTERLOCK, &ip->i_interlock,
  453                     NULL);
  454                 return;
  455         }
  456 
  457         dprintf(("ntfs_ntput: deallocating ntnode: %d\n", ip->i_number));
  458 
  459         if (LIST_FIRST(&ip->i_fnlist))
  460                 panic("ntfs_ntput: ntnode has fnodes\n");
  461 
  462         ntfs_nthashrem(ip);
  463 
  464         while ((vap = LIST_FIRST(&ip->i_valist)) != NULL) {
  465                 LIST_REMOVE(vap,va_list);
  466                 ntfs_freentvattr(vap);
  467         }
  468         mtx_unlock(&ip->i_interlock);
  469         mtx_destroy(&ip->i_interlock);
  470         lockdestroy(&ip->i_lock);
  471         vrele(ip->i_devvp);
  472         FREE(ip, M_NTFSNTNODE);
  473 }
  474 
  475 /*
  476  * increment usecount of ntnode 
  477  */
  478 void
  479 ntfs_ntref(ip)
  480         struct ntnode *ip;
  481 {
  482         mtx_lock(&ip->i_interlock);
  483         ip->i_usecount++;
  484         mtx_unlock(&ip->i_interlock);
  485 
  486         dprintf(("ntfs_ntref: ino %d, usecount: %d\n",
  487                 ip->i_number, ip->i_usecount));
  488                         
  489 }
  490 
  491 /*
  492  * Decrement usecount of ntnode.
  493  */
  494 void
  495 ntfs_ntrele(ip)
  496         struct ntnode *ip;
  497 {
  498         dprintf(("ntfs_ntrele: rele ntnode %d: %p, usecount: %d\n",
  499                 ip->i_number, ip, ip->i_usecount));
  500 
  501         mtx_lock(&ip->i_interlock);
  502         ip->i_usecount--;
  503 
  504         if (ip->i_usecount < 0)
  505                 panic("ntfs_ntrele: ino: %d usecount: %d \n",
  506                       ip->i_number,ip->i_usecount);
  507         mtx_unlock(&ip->i_interlock);
  508 }
  509 
  510 /*
  511  * Deallocate all memory allocated for ntvattr
  512  */
  513 void
  514 ntfs_freentvattr(vap)
  515         struct ntvattr * vap;
  516 {
  517         if (vap->va_flag & NTFS_AF_INRUN) {
  518                 if (vap->va_vruncn)
  519                         FREE(vap->va_vruncn, M_NTFSRUN);
  520                 if (vap->va_vruncl)
  521                         FREE(vap->va_vruncl, M_NTFSRUN);
  522         } else {
  523                 if (vap->va_datap)
  524                         FREE(vap->va_datap, M_NTFSRDATA);
  525         }
  526         FREE(vap, M_NTFSNTVATTR);
  527 }
  528 
  529 /*
  530  * Convert disk image of attribute into ntvattr structure,
  531  * runs are expanded also.
  532  */
  533 int
  534 ntfs_attrtontvattr(
  535                    struct ntfsmount * ntmp,
  536                    struct ntvattr ** rvapp,
  537                    struct attr * rap)
  538 {
  539         int             error, i;
  540         struct ntvattr *vap;
  541 
  542         error = 0;
  543         *rvapp = NULL;
  544 
  545         MALLOC(vap, struct ntvattr *, sizeof(struct ntvattr),
  546                 M_NTFSNTVATTR, M_WAITOK | M_ZERO);
  547         vap->va_ip = NULL;
  548         vap->va_flag = rap->a_hdr.a_flag;
  549         vap->va_type = rap->a_hdr.a_type;
  550         vap->va_compression = rap->a_hdr.a_compression;
  551         vap->va_index = rap->a_hdr.a_index;
  552 
  553         ddprintf(("type: 0x%x, index: %d", vap->va_type, vap->va_index));
  554 
  555         vap->va_namelen = rap->a_hdr.a_namelen;
  556         if (rap->a_hdr.a_namelen) {
  557                 wchar *unp = (wchar *) ((caddr_t) rap + rap->a_hdr.a_nameoff);
  558                 ddprintf((", name:["));
  559                 for (i = 0; i < vap->va_namelen; i++) {
  560                         vap->va_name[i] = unp[i];
  561                         ddprintf(("%c", vap->va_name[i]));
  562                 }
  563                 ddprintf(("]"));
  564         }
  565         if (vap->va_flag & NTFS_AF_INRUN) {
  566                 ddprintf((", nonres."));
  567                 vap->va_datalen = rap->a_nr.a_datalen;
  568                 vap->va_allocated = rap->a_nr.a_allocated;
  569                 vap->va_vcnstart = rap->a_nr.a_vcnstart;
  570                 vap->va_vcnend = rap->a_nr.a_vcnend;
  571                 vap->va_compressalg = rap->a_nr.a_compressalg;
  572                 error = ntfs_runtovrun(&(vap->va_vruncn), &(vap->va_vruncl),
  573                                        &(vap->va_vruncnt),
  574                                        (caddr_t) rap + rap->a_nr.a_dataoff);
  575         } else {
  576                 vap->va_compressalg = 0;
  577                 ddprintf((", res."));
  578                 vap->va_datalen = rap->a_r.a_datalen;
  579                 vap->va_allocated = rap->a_r.a_datalen;
  580                 vap->va_vcnstart = 0;
  581                 vap->va_vcnend = ntfs_btocn(vap->va_allocated);
  582                 MALLOC(vap->va_datap, caddr_t, vap->va_datalen,
  583                        M_NTFSRDATA, M_WAITOK);
  584                 memcpy(vap->va_datap, (caddr_t) rap + rap->a_r.a_dataoff,
  585                        rap->a_r.a_datalen);
  586         }
  587         ddprintf((", len: %d", vap->va_datalen));
  588 
  589         if (error)
  590                 FREE(vap, M_NTFSNTVATTR);
  591         else
  592                 *rvapp = vap;
  593 
  594         ddprintf(("\n"));
  595 
  596         return (error);
  597 }
  598 
  599 /*
  600  * Expand run into more utilizable and more memory eating format.
  601  */
  602 int
  603 ntfs_runtovrun(
  604                cn_t ** rcnp,
  605                cn_t ** rclp,
  606                u_long * rcntp,
  607                u_int8_t * run)
  608 {
  609         u_int32_t       off;
  610         u_int32_t       sz, i;
  611         cn_t           *cn;
  612         cn_t           *cl;
  613         u_long          cnt;
  614         cn_t            prev;
  615         cn_t            tmp;
  616 
  617         off = 0;
  618         cnt = 0;
  619         i = 0;
  620         while (run[off]) {
  621                 off += (run[off] & 0xF) + ((run[off] >> 4) & 0xF) + 1;
  622                 cnt++;
  623         }
  624         MALLOC(cn, cn_t *, cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
  625         MALLOC(cl, cn_t *, cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
  626 
  627         off = 0;
  628         cnt = 0;
  629         prev = 0;
  630         while (run[off]) {
  631 
  632                 sz = run[off++];
  633                 cl[cnt] = 0;
  634 
  635                 for (i = 0; i < (sz & 0xF); i++)
  636                         cl[cnt] += (u_int32_t) run[off++] << (i << 3);
  637 
  638                 sz >>= 4;
  639                 if (run[off + sz - 1] & 0x80) {
  640                         tmp = ((u_int64_t) - 1) << (sz << 3);
  641                         for (i = 0; i < sz; i++)
  642                                 tmp |= (u_int64_t) run[off++] << (i << 3);
  643                 } else {
  644                         tmp = 0;
  645                         for (i = 0; i < sz; i++)
  646                                 tmp |= (u_int64_t) run[off++] << (i << 3);
  647                 }
  648                 if (tmp)
  649                         prev = cn[cnt] = prev + tmp;
  650                 else
  651                         cn[cnt] = tmp;
  652 
  653                 cnt++;
  654         }
  655         *rcnp = cn;
  656         *rclp = cl;
  657         *rcntp = cnt;
  658         return (0);
  659 }
  660 
  661 /*
  662  * Compare unicode and ascii string case insens.
  663  */
  664 static int
  665 ntfs_uastricmp(ntmp, ustr, ustrlen, astr, astrlen)
  666         struct ntfsmount *ntmp;
  667         const wchar *ustr;
  668         size_t ustrlen;
  669         const char *astr;
  670         size_t astrlen;
  671 {
  672         int len;
  673         size_t i, j, mbstrlen = astrlen;
  674         int res;
  675         wchar wc;
  676 
  677         if (ntmp->ntm_ic_l2u) {
  678                 for (i = 0, j = 0; i < ustrlen && j < astrlen; i++, j++) {
  679                         if (j < astrlen -1) {
  680                                 wc = (wchar)astr[j]<<8 | (astr[j+1]&0xFF);
  681                                 len = 2;
  682                         } else {
  683                                 wc = (wchar)astr[j]<<8 & 0xFF00;
  684                                 len = 1;
  685                         }
  686                         res = ((int) NTFS_TOUPPER(ustr[i])) -
  687                                 ((int)NTFS_TOUPPER(NTFS_82U(wc, &len)));
  688                         j += len - 1;
  689                         mbstrlen -= len - 1;
  690 
  691                         if (res)
  692                                 return res;
  693                 }
  694         } else {
  695                 /*
  696                  * We use NTFS_82U(NTFS_U28(c)) to get rid of unicode
  697                  * symbols not covered by translation table
  698                  */
  699                 for (i = 0; i < ustrlen && i < astrlen; i++) {
  700                         res = ((int) NTFS_TOUPPER(NTFS_82U(NTFS_U28(ustr[i]), &len))) -
  701                                 ((int)NTFS_TOUPPER(NTFS_82U((wchar)astr[i], &len)));
  702                         if (res)
  703                                 return res;
  704                 }
  705         }
  706         return (ustrlen - mbstrlen);
  707 }
  708 
  709 /*
  710  * Compare unicode and ascii string case sens.
  711  */
  712 static int
  713 ntfs_uastrcmp(ntmp, ustr, ustrlen, astr, astrlen)
  714         struct ntfsmount *ntmp;
  715         const wchar *ustr;
  716         size_t ustrlen;
  717         const char *astr;
  718         size_t astrlen;
  719 {
  720         char u, l;
  721         size_t i, j, mbstrlen = astrlen;
  722         int res;
  723         wchar wc;
  724 
  725         for (i = 0, j = 0; (i < ustrlen) && (j < astrlen); i++, j++) {
  726                 res = 0;
  727                 wc = NTFS_U28(ustr[i]);
  728                 u = (char)(wc>>8);
  729                 l = (char)wc;
  730                 if (u != '\0' && j < astrlen -1) {
  731                         res = (int) (u - astr[j++]);
  732                         mbstrlen--;
  733                 }
  734                 res = (res<<8) + (int) (l - astr[j]);
  735                 if (res)
  736                         return res;
  737         }
  738         return (ustrlen - mbstrlen);
  739 }
  740 
  741 /* 
  742  * Search fnode in ntnode, if not found allocate and preinitialize.
  743  *
  744  * ntnode should be locked on entry.
  745  */
  746 int
  747 ntfs_fget(
  748         struct ntfsmount *ntmp,
  749         struct ntnode *ip,
  750         int attrtype,
  751         char *attrname,
  752         struct fnode **fpp)
  753 {
  754         struct fnode *fp;
  755 
  756         dprintf(("ntfs_fget: ino: %d, attrtype: 0x%x, attrname: %s\n",
  757                 ip->i_number,attrtype, attrname?attrname:""));
  758         *fpp = NULL;
  759         LIST_FOREACH(fp, &ip->i_fnlist, f_fnlist){
  760                 dprintf(("ntfs_fget: fnode: attrtype: %d, attrname: %s\n",
  761                         fp->f_attrtype, fp->f_attrname?fp->f_attrname:""));
  762 
  763                 if ((attrtype == fp->f_attrtype) && 
  764                     ((!attrname && !fp->f_attrname) ||
  765                      (attrname && fp->f_attrname &&
  766                       !strcmp(attrname,fp->f_attrname)))){
  767                         dprintf(("ntfs_fget: found existed: %p\n",fp));
  768                         *fpp = fp;
  769                 }
  770         }
  771 
  772         if (*fpp)
  773                 return (0);
  774 
  775         MALLOC(fp, struct fnode *, sizeof(struct fnode), M_NTFSFNODE,
  776                 M_WAITOK | M_ZERO);
  777         dprintf(("ntfs_fget: allocating fnode: %p\n",fp));
  778 
  779         fp->f_ip = ip;
  780         if (attrname) {
  781                 fp->f_flag |= FN_AATTRNAME;
  782                 MALLOC(fp->f_attrname, char *, strlen(attrname)+1, M_TEMP, M_WAITOK);
  783                 strcpy(fp->f_attrname, attrname);
  784         } else
  785                 fp->f_attrname = NULL;
  786         fp->f_attrtype = attrtype;
  787 
  788         ntfs_ntref(ip);
  789 
  790         LIST_INSERT_HEAD(&ip->i_fnlist, fp, f_fnlist);
  791 
  792         *fpp = fp;
  793 
  794         return (0);
  795 }
  796 
  797 /*
  798  * Deallocate fnode, remove it from ntnode's fnode list.
  799  *
  800  * ntnode should be locked.
  801  */
  802 void
  803 ntfs_frele(
  804         struct fnode *fp)
  805 {
  806         struct ntnode *ip = FTONT(fp);
  807 
  808         dprintf(("ntfs_frele: fnode: %p for %d: %p\n", fp, ip->i_number, ip));
  809 
  810         dprintf(("ntfs_frele: deallocating fnode\n"));
  811         LIST_REMOVE(fp,f_fnlist);
  812         if (fp->f_flag & FN_AATTRNAME)
  813                 FREE(fp->f_attrname, M_TEMP);
  814         if (fp->f_dirblbuf)
  815                 FREE(fp->f_dirblbuf, M_NTFSDIR);
  816         FREE(fp, M_NTFSFNODE);
  817         ntfs_ntrele(ip);
  818 }
  819 
  820 /*
  821  * Lookup attribute name in format: [[:$ATTR_TYPE]:$ATTR_NAME], 
  822  * $ATTR_TYPE is searched in attrdefs read from $AttrDefs.
  823  * If $ATTR_TYPE nott specifed, ATTR_A_DATA assumed.
  824  */
  825 static int
  826 ntfs_ntlookupattr(
  827                 struct ntfsmount * ntmp,
  828                 const char * name,
  829                 int namelen,
  830                 int *attrtype,
  831                 char **attrname)
  832 {
  833         const char *sys;
  834         size_t syslen, i;
  835         struct ntvattrdef *adp;
  836 
  837         if (namelen == 0)
  838                 return (0);
  839 
  840         if (name[0] == '$') {
  841                 sys = name;
  842                 for (syslen = 0; syslen < namelen; syslen++) {
  843                         if(sys[syslen] == ':') {
  844                                 name++;
  845                                 namelen--;
  846                                 break;
  847                         }
  848                 }
  849                 name += syslen;
  850                 namelen -= syslen;
  851 
  852                 adp = ntmp->ntm_ad;
  853                 for (i = 0; i < ntmp->ntm_adnum; i++, adp++){
  854                         if (syslen != adp->ad_namelen || 
  855                            strncmp(sys, adp->ad_name, syslen) != 0)
  856                                 continue;
  857 
  858                         *attrtype = adp->ad_type;
  859                         goto out;
  860                 }
  861                 return (ENOENT);
  862         } else
  863                 *attrtype = NTFS_A_DATA;
  864 
  865     out:
  866         if (namelen) {
  867                 MALLOC((*attrname), char *, namelen, M_TEMP, M_WAITOK);
  868                 memcpy((*attrname), name, namelen);
  869                 (*attrname)[namelen] = '\0';
  870         }
  871 
  872         return (0);
  873 }
  874 
  875 /*
  876  * Lookup specifed node for filename, matching cnp,
  877  * return fnode filled.
  878  */
  879 int
  880 ntfs_ntlookupfile(
  881               struct ntfsmount * ntmp,
  882               struct vnode * vp,
  883               struct componentname * cnp,
  884               struct vnode ** vpp)
  885 {
  886         struct fnode   *fp = VTOF(vp);
  887         struct ntnode  *ip = FTONT(fp);
  888         struct ntvattr *vap;    /* Root attribute */
  889         cn_t            cn;     /* VCN in current attribute */
  890         caddr_t         rdbuf;  /* Buffer to read directory's blocks  */
  891         u_int32_t       blsize;
  892         u_int32_t       rdsize; /* Length of data to read from current block */
  893         struct attr_indexentry *iep;
  894         int             error, res, anamelen, fnamelen;
  895         const char     *fname,*aname;
  896         u_int32_t       aoff;
  897         int attrtype = NTFS_A_DATA;
  898         char *attrname = NULL;
  899         struct fnode   *nfp;
  900         struct vnode   *nvp;
  901         enum vtype      f_type;
  902 
  903         error = ntfs_ntget(ip);
  904         if (error)
  905                 return (error);
  906 
  907         error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
  908         if (error || (vap->va_flag & NTFS_AF_INRUN))
  909                 return (ENOTDIR);
  910 
  911         blsize = vap->va_a_iroot->ir_size;
  912         rdsize = vap->va_datalen;
  913 
  914         /*
  915          * Divide file name into: foofilefoofilefoofile[:attrspec]
  916          * Store like this:       fname:fnamelen       [aname:anamelen]
  917          */
  918         fname = cnp->cn_nameptr;
  919         aname = NULL;
  920         anamelen = 0;
  921         for (fnamelen = 0; fnamelen < cnp->cn_namelen; fnamelen++)
  922                 if(fname[fnamelen] == ':') {
  923                         aname = fname + fnamelen + 1;
  924                         anamelen = cnp->cn_namelen - fnamelen - 1;
  925                         dprintf(("ntfs_ntlookupfile: %s (%d), attr: %s (%d)\n",
  926                                 fname, fnamelen, aname, anamelen));
  927                         break;
  928                 }
  929 
  930         dprintf(("ntfs_ntlookupfile: blksz: %d, rdsz: %d\n", blsize, rdsize));
  931 
  932         MALLOC(rdbuf, caddr_t, blsize, M_TEMP, M_WAITOK);
  933 
  934         error = ntfs_readattr(ntmp, ip, NTFS_A_INDXROOT, "$I30",
  935                                0, rdsize, rdbuf, NULL);
  936         if (error)
  937                 goto fail;
  938 
  939         aoff = sizeof(struct attr_indexroot);
  940 
  941         do {
  942                 iep = (struct attr_indexentry *) (rdbuf + aoff);
  943 
  944                 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
  945                         aoff += iep->reclen,
  946                         iep = (struct attr_indexentry *) (rdbuf + aoff))
  947                 {
  948                         ddprintf(("scan: %d, %d\n",
  949                                   (u_int32_t) iep->ie_number,
  950                                   (u_int32_t) iep->ie_fnametype));
  951 
  952                         /* check the name - the case-insensitible check
  953                          * has to come first, to break from this for loop
  954                          * if needed, so we can dive correctly */
  955                         res = NTFS_UASTRICMP(iep->ie_fname, iep->ie_fnamelen,
  956                                 fname, fnamelen);
  957                         if (res > 0) break;
  958                         if (res < 0) continue;
  959 
  960                         if (iep->ie_fnametype == 0 ||
  961                             !(ntmp->ntm_flag & NTFS_MFLAG_CASEINS))
  962                         {
  963                                 res = NTFS_UASTRCMP(iep->ie_fname,
  964                                         iep->ie_fnamelen, fname, fnamelen);
  965                                 if (res != 0) continue;
  966                         }
  967 
  968                         if (aname) {
  969                                 error = ntfs_ntlookupattr(ntmp,
  970                                         aname, anamelen,
  971                                         &attrtype, &attrname);
  972                                 if (error)
  973                                         goto fail;
  974                         }
  975 
  976                         /* Check if we've found ourself */
  977                         if ((iep->ie_number == ip->i_number) &&
  978                             (attrtype == fp->f_attrtype) &&
  979                             ((!attrname && !fp->f_attrname) ||
  980                              (attrname && fp->f_attrname &&
  981                               !strcmp(attrname, fp->f_attrname))))
  982                         {
  983                                 VREF(vp);
  984                                 *vpp = vp;
  985                                 error = 0;
  986                                 goto fail;
  987                         }
  988 
  989                         /* vget node, but don't load it */
  990                         error = ntfs_vgetex(ntmp->ntm_mountp,
  991                                    iep->ie_number, attrtype, attrname,
  992                                    LK_EXCLUSIVE, VG_DONTLOADIN | VG_DONTVALIDFN,
  993                                    curthread, &nvp);
  994 
  995                         /* free the buffer returned by ntfs_ntlookupattr() */
  996                         if (attrname) {
  997                                 FREE(attrname, M_TEMP);
  998                                 attrname = NULL;
  999                         }
 1000 
 1001                         if (error)
 1002                                 goto fail;
 1003 
 1004                         nfp = VTOF(nvp);
 1005 
 1006                         if (nfp->f_flag & FN_VALID) {
 1007                                 *vpp = nvp;
 1008                                 goto fail;
 1009                         }
 1010 
 1011                         nfp->f_fflag = iep->ie_fflag;
 1012                         nfp->f_pnumber = iep->ie_fpnumber;
 1013                         nfp->f_times = iep->ie_ftimes;
 1014 
 1015                         if((nfp->f_fflag & NTFS_FFLAG_DIR) &&
 1016                            (nfp->f_attrtype == NTFS_A_DATA) &&
 1017                            (nfp->f_attrname == NULL))
 1018                                 f_type = VDIR;  
 1019                         else
 1020                                 f_type = VREG;  
 1021 
 1022                         nvp->v_type = f_type;
 1023 
 1024                         if ((nfp->f_attrtype == NTFS_A_DATA) &&
 1025                             (nfp->f_attrname == NULL))
 1026                         {
 1027                                 /* Opening default attribute */
 1028                                 nfp->f_size = iep->ie_fsize;
 1029                                 nfp->f_allocated = iep->ie_fallocated;
 1030                                 nfp->f_flag |= FN_PRELOADED;
 1031                         } else {
 1032                                 error = ntfs_filesize(ntmp, nfp,
 1033                                             &nfp->f_size, &nfp->f_allocated);
 1034                                 if (error) {
 1035                                         vput(nvp);
 1036                                         goto fail;
 1037                                 }
 1038                         }
 1039 
 1040                         nfp->f_flag &= ~FN_VALID;
 1041                         *vpp = nvp;
 1042                         goto fail;
 1043                 }
 1044 
 1045                 /* Dive if possible */
 1046                 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) {
 1047                         dprintf(("ntfs_ntlookupfile: diving\n"));
 1048 
 1049                         cn = *(cn_t *) (rdbuf + aoff +
 1050                                         iep->reclen - sizeof(cn_t));
 1051                         rdsize = blsize;
 1052 
 1053                         error = ntfs_readattr(ntmp, ip, NTFS_A_INDX, "$I30",
 1054                                         ntfs_cntob(cn), rdsize, rdbuf, NULL);
 1055                         if (error)
 1056                                 goto fail;
 1057 
 1058                         error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
 1059                                                 rdbuf, rdsize);
 1060                         if (error)
 1061                                 goto fail;
 1062 
 1063                         aoff = (((struct attr_indexalloc *) rdbuf)->ia_hdrsize +
 1064                                 0x18);
 1065                 } else {
 1066                         dprintf(("ntfs_ntlookupfile: nowhere to dive :-(\n"));
 1067                         error = ENOENT;
 1068                         break;
 1069                 }
 1070         } while (1);
 1071 
 1072         dprintf(("finish\n"));
 1073 
 1074 fail:
 1075         if (attrname) FREE(attrname, M_TEMP);
 1076         ntfs_ntvattrrele(vap);
 1077         ntfs_ntput(ip);
 1078         FREE(rdbuf, M_TEMP);
 1079         return (error);
 1080 }
 1081 
 1082 /*
 1083  * Check if name type is permitted to show.
 1084  */
 1085 int
 1086 ntfs_isnamepermitted(
 1087                      struct ntfsmount * ntmp,
 1088                      struct attr_indexentry * iep)
 1089 {
 1090         if (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)
 1091                 return 1;
 1092 
 1093         switch (iep->ie_fnametype) {
 1094         case 2:
 1095                 ddprintf(("ntfs_isnamepermitted: skiped DOS name\n"));
 1096                 return 0;
 1097         case 0: case 1: case 3:
 1098                 return 1;
 1099         default:
 1100                 printf("ntfs_isnamepermitted: " \
 1101                        "WARNING! Unknown file name type: %d\n",
 1102                        iep->ie_fnametype);
 1103                 break;
 1104         }
 1105         return 0;
 1106 }
 1107 
 1108 /*
 1109  * Read ntfs dir like stream of attr_indexentry, not like btree of them.
 1110  * This is done by scaning $BITMAP:$I30 for busy clusters and reading them.
 1111  * Ofcouse $INDEX_ROOT:$I30 is read before. Last read values are stored in
 1112  * fnode, so we can skip toward record number num almost immediatly.
 1113  * Anyway this is rather slow routine. The problem is that we don't know
 1114  * how many records are there in $INDEX_ALLOCATION:$I30 block.
 1115  */
 1116 int
 1117 ntfs_ntreaddir(
 1118                struct ntfsmount * ntmp,
 1119                struct fnode * fp,
 1120                u_int32_t num,
 1121                struct attr_indexentry ** riepp)
 1122 {
 1123         struct ntnode  *ip = FTONT(fp);
 1124         struct ntvattr *vap = NULL;     /* IndexRoot attribute */
 1125         struct ntvattr *bmvap = NULL;   /* BitMap attribute */
 1126         struct ntvattr *iavap = NULL;   /* IndexAllocation attribute */
 1127         caddr_t         rdbuf;          /* Buffer to read directory's blocks  */
 1128         u_int8_t       *bmp = NULL;     /* Bitmap */
 1129         u_int32_t       blsize;         /* Index allocation size (2048) */
 1130         u_int32_t       rdsize;         /* Length of data to read */
 1131         u_int32_t       attrnum;        /* Current attribute type */
 1132         u_int32_t       cpbl = 1;       /* Clusters per directory block */
 1133         u_int32_t       blnum;
 1134         struct attr_indexentry *iep;
 1135         int             error = ENOENT;
 1136         u_int32_t       aoff, cnum;
 1137 
 1138         dprintf(("ntfs_ntreaddir: read ino: %d, num: %d\n", ip->i_number, num));
 1139         error = ntfs_ntget(ip);
 1140         if (error)
 1141                 return (error);
 1142 
 1143         error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
 1144         if (error)
 1145                 return (ENOTDIR);
 1146 
 1147         if (fp->f_dirblbuf == NULL) {
 1148                 fp->f_dirblsz = vap->va_a_iroot->ir_size;
 1149                 MALLOC(fp->f_dirblbuf, caddr_t,
 1150                        max(vap->va_datalen,fp->f_dirblsz), M_NTFSDIR, M_WAITOK);
 1151         }
 1152 
 1153         blsize = fp->f_dirblsz;
 1154         rdbuf = fp->f_dirblbuf;
 1155 
 1156         dprintf(("ntfs_ntreaddir: rdbuf: %p, blsize: %d\n", rdbuf, blsize));
 1157 
 1158         if (vap->va_a_iroot->ir_flag & NTFS_IRFLAG_INDXALLOC) {
 1159                 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXBITMAP, "$I30",
 1160                                         0, &bmvap);
 1161                 if (error) {
 1162                         error = ENOTDIR;
 1163                         goto fail;
 1164                 }
 1165                 MALLOC(bmp, u_int8_t *, bmvap->va_datalen, M_TEMP, M_WAITOK);
 1166                 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 0,
 1167                                        bmvap->va_datalen, bmp, NULL);
 1168                 if (error)
 1169                         goto fail;
 1170 
 1171                 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDX, "$I30",
 1172                                         0, &iavap);
 1173                 if (error) {
 1174                         error = ENOTDIR;
 1175                         goto fail;
 1176                 }
 1177                 cpbl = ntfs_btocn(blsize + ntfs_cntob(1) - 1);
 1178                 dprintf(("ntfs_ntreaddir: indexalloc: %d, cpbl: %d\n",
 1179                          iavap->va_datalen, cpbl));
 1180         } else {
 1181                 dprintf(("ntfs_ntreadidir: w/o BitMap and IndexAllocation\n"));
 1182                 iavap = bmvap = NULL;
 1183                 bmp = NULL;
 1184         }
 1185 
 1186         /* Try use previous values */
 1187         if ((fp->f_lastdnum < num) && (fp->f_lastdnum != 0)) {
 1188                 attrnum = fp->f_lastdattr;
 1189                 aoff = fp->f_lastdoff;
 1190                 blnum = fp->f_lastdblnum;
 1191                 cnum = fp->f_lastdnum;
 1192         } else {
 1193                 attrnum = NTFS_A_INDXROOT;
 1194                 aoff = sizeof(struct attr_indexroot);
 1195                 blnum = 0;
 1196                 cnum = 0;
 1197         }
 1198 
 1199         do {
 1200                 dprintf(("ntfs_ntreaddir: scan: 0x%x, %d, %d, %d, %d\n",
 1201                          attrnum, (u_int32_t) blnum, cnum, num, aoff));
 1202                 rdsize = (attrnum == NTFS_A_INDXROOT) ? vap->va_datalen : blsize;
 1203                 error = ntfs_readattr(ntmp, ip, attrnum, "$I30",
 1204                                 ntfs_cntob(blnum * cpbl), rdsize, rdbuf, NULL);
 1205                 if (error)
 1206                         goto fail;
 1207 
 1208                 if (attrnum == NTFS_A_INDX) {
 1209                         error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
 1210                                                 rdbuf, rdsize);
 1211                         if (error)
 1212                                 goto fail;
 1213                 }
 1214                 if (aoff == 0)
 1215                         aoff = (attrnum == NTFS_A_INDX) ?
 1216                                 (0x18 + ((struct attr_indexalloc *) rdbuf)->ia_hdrsize) :
 1217                                 sizeof(struct attr_indexroot);
 1218 
 1219                 iep = (struct attr_indexentry *) (rdbuf + aoff);
 1220                 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
 1221                         aoff += iep->reclen,
 1222                         iep = (struct attr_indexentry *) (rdbuf + aoff))
 1223                 {
 1224                         if (!ntfs_isnamepermitted(ntmp, iep)) continue;
 1225 
 1226                         if (cnum >= num) {
 1227                                 fp->f_lastdnum = cnum;
 1228                                 fp->f_lastdoff = aoff;
 1229                                 fp->f_lastdblnum = blnum;
 1230                                 fp->f_lastdattr = attrnum;
 1231 
 1232                                 *riepp = iep;
 1233 
 1234                                 error = 0;
 1235                                 goto fail;
 1236                         }
 1237                         cnum++;
 1238                 }
 1239 
 1240                 if (iavap) {
 1241                         if (attrnum == NTFS_A_INDXROOT)
 1242                                 blnum = 0;
 1243                         else
 1244                                 blnum++;
 1245 
 1246                         while (ntfs_cntob(blnum * cpbl) < iavap->va_datalen) {
 1247                                 if (bmp[blnum >> 3] & (1 << (blnum & 7)))
 1248                                         break;
 1249                                 blnum++;
 1250                         }
 1251 
 1252                         attrnum = NTFS_A_INDX;
 1253                         aoff = 0;
 1254                         if (ntfs_cntob(blnum * cpbl) >= iavap->va_datalen)
 1255                                 break;
 1256                         dprintf(("ntfs_ntreaddir: blnum: %d\n", (u_int32_t) blnum));
 1257                 }
 1258         } while (iavap);
 1259 
 1260         *riepp = NULL;
 1261         fp->f_lastdnum = 0;
 1262 
 1263 fail:
 1264         if (vap)
 1265                 ntfs_ntvattrrele(vap);
 1266         if (bmvap)
 1267                 ntfs_ntvattrrele(bmvap);
 1268         if (iavap)
 1269                 ntfs_ntvattrrele(iavap);
 1270         if (bmp)
 1271                 FREE(bmp, M_TEMP);
 1272         ntfs_ntput(ip);
 1273         return (error);
 1274 }
 1275 
 1276 /*
 1277  * Convert NTFS times that are in 100 ns units and begins from
 1278  * 1601 Jan 1 into unix times.
 1279  */
 1280 struct timespec
 1281 ntfs_nttimetounix(
 1282                   u_int64_t nt)
 1283 {
 1284         struct timespec t;
 1285 
 1286         /* WindowNT times are in 100 ns and from 1601 Jan 1 */
 1287         t.tv_nsec = (nt % (1000 * 1000 * 10)) * 100;
 1288         t.tv_sec = nt / (1000 * 1000 * 10) -
 1289                 369LL * 365LL * 24LL * 60LL * 60LL -
 1290                 89LL * 1LL * 24LL * 60LL * 60LL;
 1291         return (t);
 1292 }
 1293 
 1294 /*
 1295  * Get file times from NTFS_A_NAME attribute.
 1296  */
 1297 int
 1298 ntfs_times(
 1299            struct ntfsmount * ntmp,
 1300            struct ntnode * ip,
 1301            ntfs_times_t * tm)
 1302 {
 1303         struct ntvattr *vap;
 1304         int             error;
 1305 
 1306         dprintf(("ntfs_times: ino: %d...\n", ip->i_number));
 1307 
 1308         error = ntfs_ntget(ip);
 1309         if (error)
 1310                 return (error);
 1311 
 1312         error = ntfs_ntvattrget(ntmp, ip, NTFS_A_NAME, NULL, 0, &vap);
 1313         if (error) {
 1314                 ntfs_ntput(ip);
 1315                 return (error);
 1316         }
 1317         *tm = vap->va_a_name->n_times;
 1318         ntfs_ntvattrrele(vap);
 1319         ntfs_ntput(ip);
 1320 
 1321         return (0);
 1322 }
 1323 
 1324 /*
 1325  * Get file sizes from corresponding attribute. 
 1326  * 
 1327  * ntnode under fnode should be locked.
 1328  */
 1329 int
 1330 ntfs_filesize(
 1331               struct ntfsmount * ntmp,
 1332               struct fnode * fp,
 1333               u_int64_t * size,
 1334               u_int64_t * bytes)
 1335 {
 1336         struct ntvattr *vap;
 1337         struct ntnode *ip = FTONT(fp);
 1338         u_int64_t       sz, bn;
 1339         int             error;
 1340 
 1341         dprintf(("ntfs_filesize: ino: %d\n", ip->i_number));
 1342 
 1343         error = ntfs_ntvattrget(ntmp, ip,
 1344                 fp->f_attrtype, fp->f_attrname, 0, &vap);
 1345         if (error)
 1346                 return (error);
 1347 
 1348         bn = vap->va_allocated;
 1349         sz = vap->va_datalen;
 1350 
 1351         dprintf(("ntfs_filesize: %d bytes (%d bytes allocated)\n",
 1352                 (u_int32_t) sz, (u_int32_t) bn));
 1353 
 1354         if (size)
 1355                 *size = sz;
 1356         if (bytes)
 1357                 *bytes = bn;
 1358 
 1359         ntfs_ntvattrrele(vap);
 1360 
 1361         return (0);
 1362 }
 1363 
 1364 /*
 1365  * This is one of write routine.
 1366  */
 1367 int
 1368 ntfs_writeattr_plain(
 1369         struct ntfsmount * ntmp,
 1370         struct ntnode * ip,
 1371         u_int32_t attrnum,      
 1372         char *attrname,
 1373         off_t roff,
 1374         size_t rsize,
 1375         void *rdata,
 1376         size_t * initp,
 1377         struct uio *uio)
 1378 {
 1379         size_t          init;
 1380         int             error = 0;
 1381         off_t           off = roff, left = rsize, towrite;
 1382         caddr_t         data = rdata;
 1383         struct ntvattr *vap;
 1384         *initp = 0;
 1385 
 1386         while (left) {
 1387                 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
 1388                                         ntfs_btocn(off), &vap);
 1389                 if (error)
 1390                         return (error);
 1391                 towrite = min(left, ntfs_cntob(vap->va_vcnend + 1) - off);
 1392                 ddprintf(("ntfs_writeattr_plain: o: %d, s: %d (%d - %d)\n",
 1393                          (u_int32_t) off, (u_int32_t) towrite,
 1394                          (u_int32_t) vap->va_vcnstart,
 1395                          (u_int32_t) vap->va_vcnend));
 1396                 error = ntfs_writentvattr_plain(ntmp, ip, vap,
 1397                                          off - ntfs_cntob(vap->va_vcnstart),
 1398                                          towrite, data, &init, uio);
 1399                 if (error) {
 1400                         printf("ntfs_writeattr_plain: " \
 1401                                "ntfs_writentvattr_plain failed: o: %d, s: %d\n",
 1402                                (u_int32_t) off, (u_int32_t) towrite);
 1403                         printf("ntfs_writeattr_plain: attrib: %d - %d\n",
 1404                                (u_int32_t) vap->va_vcnstart, 
 1405                                (u_int32_t) vap->va_vcnend);
 1406                         ntfs_ntvattrrele(vap);
 1407                         break;
 1408                 }
 1409                 ntfs_ntvattrrele(vap);
 1410                 left -= towrite;
 1411                 off += towrite;
 1412                 data = data + towrite;
 1413                 *initp += init;
 1414         }
 1415 
 1416         return (error);
 1417 }
 1418 
 1419 /*
 1420  * This is one of write routine.
 1421  *
 1422  * ntnode should be locked.
 1423  */
 1424 int
 1425 ntfs_writentvattr_plain(
 1426         struct ntfsmount * ntmp,
 1427         struct ntnode * ip,
 1428         struct ntvattr * vap,
 1429         off_t roff,
 1430         size_t rsize,
 1431         void *rdata,
 1432         size_t * initp,
 1433         struct uio *uio)
 1434 {
 1435         int             error = 0;
 1436         int             off;
 1437         int             cnt;
 1438         cn_t            ccn, ccl, cn, left, cl;
 1439         caddr_t         data = rdata;
 1440         struct buf     *bp;
 1441         size_t          tocopy;
 1442 
 1443         *initp = 0;
 1444 
 1445         if ((vap->va_flag & NTFS_AF_INRUN) == 0) {
 1446                 printf("ntfs_writevattr_plain: CAN'T WRITE RES. ATTRIBUTE\n");
 1447                 return ENOTTY;
 1448         }
 1449 
 1450         ddprintf(("ntfs_writentvattr_plain: data in run: %ld chains\n",
 1451                  vap->va_vruncnt));
 1452 
 1453         off = roff;
 1454         left = rsize;
 1455         ccl = 0;
 1456         ccn = 0;
 1457         cnt = 0;
 1458         for (; left && (cnt < vap->va_vruncnt); cnt++) {
 1459                 ccn = vap->va_vruncn[cnt];
 1460                 ccl = vap->va_vruncl[cnt];
 1461 
 1462                 ddprintf(("ntfs_writentvattr_plain: " \
 1463                          "left %d, cn: 0x%x, cl: %d, off: %d\n", \
 1464                          (u_int32_t) left, (u_int32_t) ccn, \
 1465                          (u_int32_t) ccl, (u_int32_t) off));
 1466 
 1467                 if (ntfs_cntob(ccl) < off) {
 1468                         off -= ntfs_cntob(ccl);
 1469                         cnt++;
 1470                         continue;
 1471                 }
 1472                 if (!ccn && ip->i_number != NTFS_BOOTINO)
 1473                         continue; /* XXX */
 1474 
 1475                 ccl -= ntfs_btocn(off);
 1476                 cn = ccn + ntfs_btocn(off);
 1477                 off = ntfs_btocnoff(off);
 1478 
 1479                 while (left && ccl) {
 1480                         /*
 1481                          * Always read and write single clusters at a time -
 1482                          * we need to avoid requesting differently-sized
 1483                          * blocks at the same disk offsets to avoid
 1484                          * confusing the buffer cache.
 1485                          */
 1486                         tocopy = min(left, ntfs_cntob(1) - off);
 1487                         cl = ntfs_btocl(tocopy + off);
 1488                         KASSERT(cl == 1 && tocopy <= ntfs_cntob(1),
 1489                             ("single cluster limit mistake"));
 1490                         ddprintf(("ntfs_writentvattr_plain: write: " \
 1491                                 "cn: 0x%x cl: %d, off: %d len: %d, left: %d\n",
 1492                                 (u_int32_t) cn, (u_int32_t) cl, 
 1493                                 (u_int32_t) off, (u_int32_t) tocopy, 
 1494                                 (u_int32_t) left));
 1495                         if ((off == 0) && (tocopy == ntfs_cntob(cl)))
 1496                         {
 1497                                 bp = getblk(ntmp->ntm_devvp, ntfs_cntobn(cn),
 1498                                             ntfs_cntob(cl), 0, 0, 0);
 1499                                 clrbuf(bp);
 1500                         } else {
 1501                                 error = bread(ntmp->ntm_devvp, ntfs_cntobn(cn),
 1502                                               ntfs_cntob(cl), NOCRED, &bp);
 1503                                 if (error) {
 1504                                         brelse(bp);
 1505                                         return (error);
 1506                                 }
 1507                         }
 1508                         if (uio)
 1509                                 uiomove(bp->b_data + off, tocopy, uio);
 1510                         else
 1511                                 memcpy(bp->b_data + off, data, tocopy);
 1512                         bawrite(bp);
 1513                         data = data + tocopy;
 1514                         *initp += tocopy;
 1515                         off = 0;
 1516                         left -= tocopy;
 1517                         cn += cl;
 1518                         ccl -= cl;
 1519                 }
 1520         }
 1521 
 1522         if (left) {
 1523                 printf("ntfs_writentvattr_plain: POSSIBLE RUN ERROR\n");
 1524                 error = EINVAL;
 1525         }
 1526 
 1527         return (error);
 1528 }
 1529 
 1530 /*
 1531  * This is one of read routines.
 1532  *
 1533  * ntnode should be locked.
 1534  */
 1535 int
 1536 ntfs_readntvattr_plain(
 1537         struct ntfsmount * ntmp,
 1538         struct ntnode * ip,
 1539         struct ntvattr * vap,
 1540         off_t roff,
 1541         size_t rsize,
 1542         void *rdata,
 1543         size_t * initp,
 1544         struct uio *uio)
 1545 {
 1546         int             error = 0;
 1547         int             off;
 1548 
 1549         *initp = 0;
 1550         if (vap->va_flag & NTFS_AF_INRUN) {
 1551                 int             cnt;
 1552                 cn_t            ccn, ccl, cn, left, cl;
 1553                 caddr_t         data = rdata;
 1554                 struct buf     *bp;
 1555                 size_t          tocopy;
 1556 
 1557                 ddprintf(("ntfs_readntvattr_plain: data in run: %ld chains\n",
 1558                          vap->va_vruncnt));
 1559 
 1560                 off = roff;
 1561                 left = rsize;
 1562                 ccl = 0;
 1563                 ccn = 0;
 1564                 cnt = 0;
 1565                 while (left && (cnt < vap->va_vruncnt)) {
 1566                         ccn = vap->va_vruncn[cnt];
 1567                         ccl = vap->va_vruncl[cnt];
 1568 
 1569                         ddprintf(("ntfs_readntvattr_plain: " \
 1570                                  "left %d, cn: 0x%x, cl: %d, off: %d\n", \
 1571                                  (u_int32_t) left, (u_int32_t) ccn, \
 1572                                  (u_int32_t) ccl, (u_int32_t) off));
 1573 
 1574                         if (ntfs_cntob(ccl) < off) {
 1575                                 off -= ntfs_cntob(ccl);
 1576                                 cnt++;
 1577                                 continue;
 1578                         }
 1579                         if (ccn || ip->i_number == NTFS_BOOTINO) {
 1580                                 ccl -= ntfs_btocn(off);
 1581                                 cn = ccn + ntfs_btocn(off);
 1582                                 off = ntfs_btocnoff(off);
 1583 
 1584                                 while (left && ccl) {
 1585                                         /*
 1586                                          * Always read single clusters at a
 1587                                          * time - we need to avoid reading
 1588                                          * differently-sized blocks at the
 1589                                          * same disk offsets to avoid
 1590                                          * confusing the buffer cache.
 1591                                          */
 1592                                         tocopy = min(left,
 1593                                             ntfs_cntob(1) - off);
 1594                                         cl = ntfs_btocl(tocopy + off);
 1595                                         KASSERT(cl == 1 &&
 1596                                             tocopy <= ntfs_cntob(1),
 1597                                             ("single cluster limit mistake"));
 1598 
 1599                                         ddprintf(("ntfs_readntvattr_plain: " \
 1600                                                 "read: cn: 0x%x cl: %d, " \
 1601                                                 "off: %d len: %d, left: %d\n",
 1602                                                 (u_int32_t) cn, 
 1603                                                 (u_int32_t) cl, 
 1604                                                 (u_int32_t) off, 
 1605                                                 (u_int32_t) tocopy, 
 1606                                                 (u_int32_t) left));
 1607                                         error = bread(ntmp->ntm_devvp,
 1608                                                       ntfs_cntobn(cn),
 1609                                                       ntfs_cntob(cl),
 1610                                                       NOCRED, &bp);
 1611                                         if (error) {
 1612                                                 brelse(bp);
 1613                                                 return (error);
 1614                                         }
 1615                                         if (uio) {
 1616                                                 uiomove(bp->b_data + off,
 1617                                                         tocopy, uio);
 1618                                         } else {
 1619                                                 memcpy(data, bp->b_data + off,
 1620                                                         tocopy);
 1621                                         }
 1622                                         brelse(bp);
 1623                                         data = data + tocopy;
 1624                                         *initp += tocopy;
 1625                                         off = 0;
 1626                                         left -= tocopy;
 1627                                         cn += cl;
 1628                                         ccl -= cl;
 1629                                 }
 1630                         } else {
 1631                                 tocopy = min(left, ntfs_cntob(ccl) - off);
 1632                                 ddprintf(("ntfs_readntvattr_plain: "
 1633                                         "hole: ccn: 0x%x ccl: %d, off: %d, " \
 1634                                         " len: %d, left: %d\n", 
 1635                                         (u_int32_t) ccn, (u_int32_t) ccl, 
 1636                                         (u_int32_t) off, (u_int32_t) tocopy, 
 1637                                         (u_int32_t) left));
 1638                                 left -= tocopy;
 1639                                 off = 0;
 1640                                 if (uio) {
 1641                                         size_t remains = tocopy;
 1642                                         for(; remains; remains--)
 1643                                                 uiomove("", 1, uio);
 1644                                 } else 
 1645                                         bzero(data, tocopy);
 1646                                 data = data + tocopy;
 1647                         }
 1648                         cnt++;
 1649                 }
 1650                 if (left) {
 1651                         printf("ntfs_readntvattr_plain: POSSIBLE RUN ERROR\n");
 1652                         error = E2BIG;
 1653                 }
 1654         } else {
 1655                 ddprintf(("ntfs_readnvattr_plain: data is in mft record\n"));
 1656                 if (uio) 
 1657                         uiomove(vap->va_datap + roff, rsize, uio);
 1658                 else
 1659                         memcpy(rdata, vap->va_datap + roff, rsize);
 1660                 *initp += rsize;
 1661         }
 1662 
 1663         return (error);
 1664 }
 1665 
 1666 /*
 1667  * This is one of read routines.
 1668  */
 1669 int
 1670 ntfs_readattr_plain(
 1671         struct ntfsmount * ntmp,
 1672         struct ntnode * ip,
 1673         u_int32_t attrnum,      
 1674         char *attrname,
 1675         off_t roff,
 1676         size_t rsize,
 1677         void *rdata,
 1678         size_t * initp,
 1679         struct uio *uio)
 1680 {
 1681         size_t          init;
 1682         int             error = 0;
 1683         off_t           off = roff, left = rsize, toread;
 1684         caddr_t         data = rdata;
 1685         struct ntvattr *vap;
 1686         *initp = 0;
 1687 
 1688         while (left) {
 1689                 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
 1690                                         ntfs_btocn(off), &vap);
 1691                 if (error)
 1692                         return (error);
 1693                 toread = min(left, ntfs_cntob(vap->va_vcnend + 1) - off);
 1694                 ddprintf(("ntfs_readattr_plain: o: %d, s: %d (%d - %d)\n",
 1695                          (u_int32_t) off, (u_int32_t) toread,
 1696                          (u_int32_t) vap->va_vcnstart,
 1697                          (u_int32_t) vap->va_vcnend));
 1698                 error = ntfs_readntvattr_plain(ntmp, ip, vap,
 1699                                          off - ntfs_cntob(vap->va_vcnstart),
 1700                                          toread, data, &init, uio);
 1701                 if (error) {
 1702                         printf("ntfs_readattr_plain: " \
 1703                                "ntfs_readntvattr_plain failed: o: %d, s: %d\n",
 1704                                (u_int32_t) off, (u_int32_t) toread);
 1705                         printf("ntfs_readattr_plain: attrib: %d - %d\n",
 1706                                (u_int32_t) vap->va_vcnstart, 
 1707                                (u_int32_t) vap->va_vcnend);
 1708                         ntfs_ntvattrrele(vap);
 1709                         break;
 1710                 }
 1711                 ntfs_ntvattrrele(vap);
 1712                 left -= toread;
 1713                 off += toread;
 1714                 data = data + toread;
 1715                 *initp += init;
 1716         }
 1717 
 1718         return (error);
 1719 }
 1720 
 1721 /*
 1722  * This is one of read routines.
 1723  */
 1724 int
 1725 ntfs_readattr(
 1726         struct ntfsmount * ntmp,
 1727         struct ntnode * ip,
 1728         u_int32_t attrnum,
 1729         char *attrname,
 1730         off_t roff,
 1731         size_t rsize,
 1732         void *rdata,
 1733         struct uio *uio)
 1734 {
 1735         int             error = 0;
 1736         struct ntvattr *vap;
 1737         size_t          init;
 1738 
 1739         ddprintf(("ntfs_readattr: reading %d: 0x%x, from %d size %d bytes\n",
 1740                ip->i_number, attrnum, (u_int32_t) roff, (u_int32_t) rsize));
 1741 
 1742         error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 0, &vap);
 1743         if (error)
 1744                 return (error);
 1745 
 1746         if ((roff > vap->va_datalen) ||
 1747             (roff + rsize > vap->va_datalen)) {
 1748                 ddprintf(("ntfs_readattr: offset too big\n"));
 1749                 ntfs_ntvattrrele(vap);
 1750                 return (E2BIG);
 1751         }
 1752         if (vap->va_compression && vap->va_compressalg) {
 1753                 u_int8_t       *cup;
 1754                 u_int8_t       *uup;
 1755                 off_t           off = roff, left = rsize, tocopy;
 1756                 caddr_t         data = rdata;
 1757                 cn_t            cn;
 1758 
 1759                 ddprintf(("ntfs_ntreadattr: compression: %d\n",
 1760                          vap->va_compressalg));
 1761 
 1762                 MALLOC(cup, u_int8_t *, ntfs_cntob(NTFS_COMPUNIT_CL),
 1763                        M_NTFSDECOMP, M_WAITOK);
 1764                 MALLOC(uup, u_int8_t *, ntfs_cntob(NTFS_COMPUNIT_CL),
 1765                        M_NTFSDECOMP, M_WAITOK);
 1766 
 1767                 cn = (ntfs_btocn(roff)) & (~(NTFS_COMPUNIT_CL - 1));
 1768                 off = roff - ntfs_cntob(cn);
 1769 
 1770                 while (left) {
 1771                         error = ntfs_readattr_plain(ntmp, ip, attrnum,
 1772                                                   attrname, ntfs_cntob(cn),
 1773                                                   ntfs_cntob(NTFS_COMPUNIT_CL),
 1774                                                   cup, &init, NULL);
 1775                         if (error)
 1776                                 break;
 1777 
 1778                         tocopy = min(left, ntfs_cntob(NTFS_COMPUNIT_CL) - off);
 1779 
 1780                         if (init == ntfs_cntob(NTFS_COMPUNIT_CL)) {
 1781                                 if (uio)
 1782                                         uiomove(cup + off, tocopy, uio);
 1783                                 else
 1784                                         memcpy(data, cup + off, tocopy);
 1785                         } else if (init == 0) {
 1786                                 if (uio) {
 1787                                         size_t remains = tocopy;
 1788                                         for(; remains; remains--)
 1789                                                 uiomove("", 1, uio);
 1790                                 }
 1791                                 else
 1792                                         bzero(data, tocopy);
 1793                         } else {
 1794                                 error = ntfs_uncompunit(ntmp, uup, cup);
 1795                                 if (error)
 1796                                         break;
 1797                                 if (uio)
 1798                                         uiomove(uup + off, tocopy, uio);
 1799                                 else
 1800                                         memcpy(data, uup + off, tocopy);
 1801                         }
 1802 
 1803                         left -= tocopy;
 1804                         data = data + tocopy;
 1805                         off += tocopy - ntfs_cntob(NTFS_COMPUNIT_CL);
 1806                         cn += NTFS_COMPUNIT_CL;
 1807                 }
 1808 
 1809                 FREE(uup, M_NTFSDECOMP);
 1810                 FREE(cup, M_NTFSDECOMP);
 1811         } else
 1812                 error = ntfs_readattr_plain(ntmp, ip, attrnum, attrname,
 1813                                              roff, rsize, rdata, &init, uio);
 1814         ntfs_ntvattrrele(vap);
 1815         return (error);
 1816 }
 1817 
 1818 #if UNUSED_CODE
 1819 int
 1820 ntfs_parserun(
 1821               cn_t * cn,
 1822               cn_t * cl,
 1823               u_int8_t * run,
 1824               u_long len,
 1825               u_long *off)
 1826 {
 1827         u_int8_t        sz;
 1828         int             i;
 1829 
 1830         if (NULL == run) {
 1831                 printf("ntfs_parsetun: run == NULL\n");
 1832                 return (EINVAL);
 1833         }
 1834         sz = run[(*off)++];
 1835         if (0 == sz) {
 1836                 printf("ntfs_parserun: trying to go out of run\n");
 1837                 return (E2BIG);
 1838         }
 1839         *cl = 0;
 1840         if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
 1841                 printf("ntfs_parserun: " \
 1842                        "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
 1843                        sz, len, *off);
 1844                 return (EINVAL);
 1845         }
 1846         for (i = 0; i < (sz & 0xF); i++)
 1847                 *cl += (u_int32_t) run[(*off)++] << (i << 3);
 1848 
 1849         sz >>= 4;
 1850         if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
 1851                 printf("ntfs_parserun: " \
 1852                        "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
 1853                        sz, len, *off);
 1854                 return (EINVAL);
 1855         }
 1856         for (i = 0; i < (sz & 0xF); i++)
 1857                 *cn += (u_int32_t) run[(*off)++] << (i << 3);
 1858 
 1859         return (0);
 1860 }
 1861 #endif
 1862 
 1863 /*
 1864  * Process fixup routine on given buffer.
 1865  */
 1866 int
 1867 ntfs_procfixups(
 1868                 struct ntfsmount * ntmp,
 1869                 u_int32_t magic,
 1870                 caddr_t buf,
 1871                 size_t len)
 1872 {
 1873         struct fixuphdr *fhp = (struct fixuphdr *) buf;
 1874         int             i;
 1875         u_int16_t       fixup;
 1876         u_int16_t      *fxp;
 1877         u_int16_t      *cfxp;
 1878 
 1879         if (fhp->fh_magic != magic) {
 1880                 printf("ntfs_procfixups: magic doesn't match: %08x != %08x\n",
 1881                        fhp->fh_magic, magic);
 1882                 return (EINVAL);
 1883         }
 1884         if ((fhp->fh_fnum - 1) * ntmp->ntm_bps != len) {
 1885                 printf("ntfs_procfixups: " \
 1886                        "bad fixups number: %d for %ld bytes block\n", 
 1887                        fhp->fh_fnum, (long)len);        /* XXX printf kludge */
 1888                 return (EINVAL);
 1889         }
 1890         if (fhp->fh_foff >= ntmp->ntm_spc * ntmp->ntm_mftrecsz * ntmp->ntm_bps) {
 1891                 printf("ntfs_procfixups: invalid offset: %x", fhp->fh_foff);
 1892                 return (EINVAL);
 1893         }
 1894         fxp = (u_int16_t *) (buf + fhp->fh_foff);
 1895         cfxp = (u_int16_t *) (buf + ntmp->ntm_bps - 2);
 1896         fixup = *fxp++;
 1897         for (i = 1; i < fhp->fh_fnum; i++, fxp++) {
 1898                 if (*cfxp != fixup) {
 1899                         printf("ntfs_procfixups: fixup %d doesn't match\n", i);
 1900                         return (EINVAL);
 1901                 }
 1902                 *cfxp = *fxp;
 1903                 cfxp = (u_int16_t *) ((caddr_t) cfxp + ntmp->ntm_bps);
 1904         }
 1905         return (0);
 1906 }
 1907 
 1908 #if UNUSED_CODE
 1909 int
 1910 ntfs_runtocn(
 1911              cn_t * cn, 
 1912              struct ntfsmount * ntmp,
 1913              u_int8_t * run,
 1914              u_long len,
 1915              cn_t vcn)
 1916 {
 1917         cn_t            ccn = 0;
 1918         cn_t            ccl = 0;
 1919         u_long          off = 0;
 1920         int             error = 0;
 1921 
 1922 #if NTFS_DEBUG
 1923         int             i;
 1924         printf("ntfs_runtocn: run: %p, %ld bytes, vcn:%ld\n",
 1925                 run, len, (u_long) vcn);
 1926         printf("ntfs_runtocn: run: ");
 1927         for (i = 0; i < len; i++)
 1928                 printf("0x%02x ", run[i]);
 1929         printf("\n");
 1930 #endif
 1931 
 1932         if (NULL == run) {
 1933                 printf("ntfs_runtocn: run == NULL\n");
 1934                 return (EINVAL);
 1935         }
 1936         do {
 1937                 if (run[off] == 0) {
 1938                         printf("ntfs_runtocn: vcn too big\n");
 1939                         return (E2BIG);
 1940                 }
 1941                 vcn -= ccl;
 1942                 error = ntfs_parserun(&ccn, &ccl, run, len, &off);
 1943                 if (error) {
 1944                         printf("ntfs_runtocn: ntfs_parserun failed\n");
 1945                         return (error);
 1946                 }
 1947         } while (ccl <= vcn);
 1948         *cn = ccn + vcn;
 1949         return (0);
 1950 }
 1951 #endif
 1952 
 1953 /*
 1954  * this initializes toupper table & dependant variables to be ready for
 1955  * later work
 1956  */
 1957 void
 1958 ntfs_toupper_init()
 1959 {
 1960         ntfs_toupper_tab = (wchar *) NULL;
 1961         lockinit(&ntfs_toupper_lock, PVFS, "ntfs_toupper", 0, 0);
 1962         ntfs_toupper_usecount = 0;
 1963 }
 1964 
 1965 void
 1966 ntfs_toupper_destroy(void)
 1967 {
 1968 
 1969         lockdestroy(&ntfs_toupper_lock);
 1970 }
 1971 
 1972 /*
 1973  * if the ntfs_toupper_tab[] is filled already, just raise use count;
 1974  * otherwise read the data from the filesystem we are currently mounting
 1975  */
 1976 int
 1977 ntfs_toupper_use(mp, ntmp)
 1978         struct mount *mp;
 1979         struct ntfsmount *ntmp;
 1980 {
 1981         int error = 0;
 1982         struct vnode *vp;
 1983 
 1984         /* get exclusive access */
 1985         lockmgr(&ntfs_toupper_lock, LK_EXCLUSIVE, NULL, NULL);
 1986         
 1987         /* only read the translation data from a file if it hasn't been
 1988          * read already */
 1989         if (ntfs_toupper_tab)
 1990                 goto out;
 1991 
 1992         /*
 1993          * Read in Unicode lowercase -> uppercase translation file.
 1994          * XXX for now, just the first 256 entries are used anyway,
 1995          * so don't bother reading more
 1996          */
 1997         MALLOC(ntfs_toupper_tab, wchar *, 65536 * sizeof(wchar),
 1998                 M_NTFSRDATA, M_WAITOK);
 1999 
 2000         if ((error = VFS_VGET(mp, NTFS_UPCASEINO, LK_EXCLUSIVE, &vp)))
 2001                 goto out;
 2002         error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
 2003                         0, 65536*sizeof(wchar), (char *) ntfs_toupper_tab, NULL);
 2004         vput(vp);
 2005 
 2006     out:
 2007         ntfs_toupper_usecount++;
 2008         lockmgr(&ntfs_toupper_lock, LK_RELEASE, NULL, NULL);
 2009         return (error);
 2010 }
 2011 
 2012 /*
 2013  * lower the use count and if it reaches zero, free the memory
 2014  * tied by toupper table
 2015  */
 2016 void
 2017 ntfs_toupper_unuse()
 2018 {
 2019         /* get exclusive access */
 2020         lockmgr(&ntfs_toupper_lock, LK_EXCLUSIVE, NULL, NULL);
 2021 
 2022         ntfs_toupper_usecount--;
 2023         if (ntfs_toupper_usecount == 0) {
 2024                 FREE(ntfs_toupper_tab, M_NTFSRDATA);
 2025                 ntfs_toupper_tab = NULL;
 2026         }
 2027 #ifdef DIAGNOSTIC
 2028         else if (ntfs_toupper_usecount < 0) {
 2029                 panic("ntfs_toupper_unuse(): use count negative: %d\n",
 2030                         ntfs_toupper_usecount);
 2031         }
 2032 #endif
 2033         
 2034         /* release the lock */
 2035         lockmgr(&ntfs_toupper_lock, LK_RELEASE, NULL, NULL);
 2036 } 
 2037 
 2038 int
 2039 ntfs_u28_init(
 2040         struct ntfsmount *ntmp,
 2041         wchar *u2w,
 2042         char *cs_local,
 2043         char *cs_ntfs)
 2044 {
 2045         char ** u28;
 2046         int i, j, h, l;
 2047 
 2048         if (ntfs_iconv && cs_local) {
 2049                 ntfs_iconv->open(cs_local, cs_ntfs, &ntmp->ntm_ic_u2l);
 2050                 return (0);
 2051         }
 2052 
 2053         MALLOC(u28, char **, 256 * sizeof(char*), M_TEMP, M_WAITOK | M_ZERO);
 2054 
 2055         for (i=0; i<256; i++) {
 2056                 h = (u2w[i] >> 8) & 0xFF;
 2057                 l = (u2w[i]) &0xFF;
 2058 
 2059                 if (u28[h] == NULL) {
 2060                         MALLOC(u28[h], char *, 256 * sizeof(char), M_TEMP, M_WAITOK);
 2061                         for (j=0; j<256; j++)
 2062                                 u28[h][j] = '_';
 2063                 }
 2064 
 2065                 u28[h][l] = i & 0xFF;
 2066         }
 2067 
 2068         ntmp->ntm_u28 = u28;
 2069 
 2070         return (0);
 2071 }
 2072 
 2073 int
 2074 ntfs_u28_uninit(struct ntfsmount *ntmp)
 2075 {
 2076         char ** u28;
 2077         int i;
 2078 
 2079         if (ntmp->ntm_u28 == NULL) {
 2080                 if (ntfs_iconv && ntmp->ntm_ic_u2l) {
 2081                         ntfs_iconv->close(ntmp->ntm_ic_u2l);
 2082                 }
 2083                 return (0);
 2084         }
 2085 
 2086         u28 = ntmp->ntm_u28;
 2087 
 2088         for (i=0; i<256; i++)
 2089                 if (u28[i] != NULL)
 2090                         FREE(u28[i], M_TEMP);
 2091 
 2092         FREE(u28, M_TEMP);
 2093 
 2094         return (0);
 2095 }
 2096 
 2097 int
 2098 ntfs_82u_init(
 2099         struct ntfsmount *ntmp,
 2100         char *cs_local,
 2101         char *cs_ntfs)
 2102 {
 2103         wchar * _82u;
 2104         int i;
 2105 
 2106         if (ntfs_iconv && cs_local) {
 2107                 ntfs_iconv->open(cs_ntfs, cs_local, &ntmp->ntm_ic_l2u);
 2108                 return (0);
 2109         }
 2110 
 2111         MALLOC(_82u, wchar *, 256 * sizeof(wchar), M_TEMP, M_WAITOK);
 2112 
 2113         for (i=0; i<256; i++)
 2114                         _82u[i] = i;
 2115 
 2116         ntmp->ntm_82u = _82u;
 2117 
 2118         return (0);
 2119 }
 2120 
 2121 int
 2122 ntfs_82u_uninit(struct ntfsmount *ntmp)
 2123 {
 2124 
 2125         if (ntmp->ntm_82u == NULL) {
 2126                 if (ntfs_iconv && ntmp->ntm_ic_l2u) {
 2127                         ntfs_iconv->close(ntmp->ntm_ic_l2u);
 2128                 }
 2129                 return (0);
 2130         }
 2131 
 2132         FREE(ntmp->ntm_82u, M_TEMP);
 2133         return (0);
 2134 }
 2135 
 2136 /*
 2137  * maps the Unicode char to 8bit equivalent
 2138  * XXX currently only gets lower 8bit from the Unicode char
 2139  * and substitutes a '_' for it if the result would be '\0';
 2140  * something better has to be definitely though out
 2141  */
 2142 wchar
 2143 ntfs_u28(
 2144         struct ntfsmount *ntmp, 
 2145         wchar wc)
 2146 {
 2147         char *p, *outp, inbuf[3], outbuf[3];
 2148         size_t ilen, olen;
 2149 
 2150         if (ntfs_iconv && ntmp->ntm_ic_u2l) {
 2151                 ilen = olen = 2;
 2152 
 2153                 inbuf[0] = (char)(wc>>8);
 2154                 inbuf[1] = (char)wc;
 2155                 inbuf[2] = '\0';
 2156                 p = inbuf;
 2157                 outp = outbuf;
 2158                 ntfs_iconv->convchr(ntmp->ntm_ic_u2l, (const char **)&p, &ilen,
 2159                                     &outp, &olen);
 2160                 if (olen == 1) {
 2161                         return ((wchar)(outbuf[0]&0xFF));
 2162                 } else if (olen == 0) {
 2163                         return ((wchar)((outbuf[0]<<8) | (outbuf[1]&0xFF)));
 2164                 }
 2165                 return ('?');
 2166         }
 2167 
 2168         p = ntmp->ntm_u28[(wc>>8)&0xFF];
 2169         if (p == NULL)
 2170                 return ('_');
 2171         return (p[wc&0xFF]&0xFF);
 2172 }
 2173 
 2174 wchar
 2175 ntfs_82u(
 2176         struct ntfsmount *ntmp, 
 2177         wchar wc,
 2178         int *len)
 2179 {
 2180         char *p, *outp, inbuf[3], outbuf[3];
 2181         wchar uc;
 2182         size_t ilen, olen;
 2183 
 2184         if (ntfs_iconv && ntmp->ntm_ic_l2u) {
 2185                 ilen = (size_t)*len;
 2186                 olen = 2;
 2187 
 2188                 inbuf[0] = (char)(wc>>8);
 2189                 inbuf[1] = (char)wc;
 2190                 inbuf[2] = '\0';
 2191                 p = inbuf;
 2192                 outp = outbuf;
 2193                 ntfs_iconv->convchr(ntmp->ntm_ic_l2u, (const char **)&p, &ilen,
 2194                                     &outp, &olen);
 2195                 *len -= (int)ilen;
 2196                 uc = (wchar)((outbuf[0]<<8) | (outbuf[1]&0xFF));
 2197 
 2198                 return (uc);
 2199         }
 2200 
 2201         if (ntmp->ntm_82u != NULL)
 2202                 return (ntmp->ntm_82u[wc&0xFF]);
 2203 
 2204         return ('?');
 2205 }
 2206 

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