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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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: stable/8/sys/fs/ntfs/ntfs_subr.c 230206 2012-01-16 08:31:32Z kevlo $
   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, "ntfsd_resdata", "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         alpool = malloc(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         mfrp = malloc(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 
  363         return 0;
  364 }
  365 
  366 /*
  367  * Routine search ntnode in hash, if found: lock, inc usecount and return.
  368  * If not in hash allocate structure for ntnode, prefill it, lock,
  369  * inc count and return.
  370  *
  371  * ntnode returned locked
  372  */
  373 int
  374 ntfs_ntlookup(
  375            struct ntfsmount * ntmp,
  376            ino_t ino,
  377            struct ntnode ** ipp)
  378 {
  379         struct ntnode  *ip;
  380 
  381         dprintf(("ntfs_ntlookup: looking for ntnode %d\n", ino));
  382 
  383         do {
  384                 ip = ntfs_nthashlookup(ntmp->ntm_devvp->v_rdev, ino);
  385                 if (ip != NULL) {
  386                         ntfs_ntget(ip);
  387                         dprintf(("ntfs_ntlookup: ntnode %d: %p, usecount: %d\n",
  388                                 ino, ip, ip->i_usecount));
  389                         *ipp = ip;
  390                         return (0);
  391                 }
  392         } while (lockmgr(&ntfs_hashlock, LK_EXCLUSIVE | LK_SLEEPFAIL, NULL));
  393 
  394         ip = malloc(sizeof(struct ntnode), M_NTFSNTNODE,
  395                 M_WAITOK | M_ZERO);
  396         ddprintf(("ntfs_ntlookup: allocating ntnode: %d: %p\n", ino, ip));
  397 
  398         /* Generic initialization */
  399         ip->i_devvp = ntmp->ntm_devvp;
  400         ip->i_dev = ntmp->ntm_devvp->v_rdev;
  401         ip->i_number = ino;
  402         ip->i_mp = ntmp;
  403 
  404         LIST_INIT(&ip->i_fnlist);
  405         VREF(ip->i_devvp);
  406 
  407         /* init lock and lock the newborn ntnode */
  408         lockinit(&ip->i_lock, PINOD, "ntnode", 0, 0);
  409         mtx_init(&ip->i_interlock, "ntnode interlock", NULL, MTX_DEF);
  410         ntfs_ntget(ip);
  411 
  412         ntfs_nthashins(ip);
  413 
  414         lockmgr(&ntfs_hashlock, LK_RELEASE, NULL);
  415 
  416         *ipp = ip;
  417 
  418         dprintf(("ntfs_ntlookup: ntnode %d: %p, usecount: %d\n",
  419                 ino, ip, ip->i_usecount));
  420 
  421         return (0);
  422 }
  423 
  424 /*
  425  * Decrement usecount of ntnode and unlock it, if usecount reach zero,
  426  * deallocate ntnode.
  427  *
  428  * ntnode should be locked on entry, and unlocked on return.
  429  */
  430 void
  431 ntfs_ntput(ip)
  432         struct ntnode *ip;
  433 {
  434         struct ntvattr *vap;
  435 
  436         dprintf(("ntfs_ntput: rele ntnode %d: %p, usecount: %d\n",
  437                 ip->i_number, ip, ip->i_usecount));
  438 
  439         mtx_lock(&ip->i_interlock);
  440         ip->i_usecount--;
  441 
  442 #ifdef DIAGNOSTIC
  443         if (ip->i_usecount < 0) {
  444                 panic("ntfs_ntput: ino: %d usecount: %d \n",
  445                       ip->i_number,ip->i_usecount);
  446         }
  447 #endif
  448 
  449         if (ip->i_usecount > 0) {
  450                 lockmgr(&ip->i_lock, LK_RELEASE|LK_INTERLOCK, &ip->i_interlock);
  451                 return;
  452         }
  453 
  454         dprintf(("ntfs_ntput: deallocating ntnode: %d\n", ip->i_number));
  455 
  456         if (LIST_FIRST(&ip->i_fnlist))
  457                 panic("ntfs_ntput: ntnode has fnodes\n");
  458 
  459         ntfs_nthashrem(ip);
  460 
  461         while ((vap = LIST_FIRST(&ip->i_valist)) != NULL) {
  462                 LIST_REMOVE(vap,va_list);
  463                 ntfs_freentvattr(vap);
  464         }
  465         lockmgr(&ip->i_lock, LK_RELEASE | LK_INTERLOCK, &ip->i_interlock);
  466         mtx_destroy(&ip->i_interlock);
  467         lockdestroy(&ip->i_lock);
  468         vrele(ip->i_devvp);
  469         free(ip, M_NTFSNTNODE);
  470 }
  471 
  472 /*
  473  * increment usecount of ntnode 
  474  */
  475 void
  476 ntfs_ntref(ip)
  477         struct ntnode *ip;
  478 {
  479         mtx_lock(&ip->i_interlock);
  480         ip->i_usecount++;
  481         mtx_unlock(&ip->i_interlock);
  482 
  483         dprintf(("ntfs_ntref: ino %d, usecount: %d\n",
  484                 ip->i_number, ip->i_usecount));
  485                         
  486 }
  487 
  488 /*
  489  * Decrement usecount of ntnode.
  490  */
  491 void
  492 ntfs_ntrele(ip)
  493         struct ntnode *ip;
  494 {
  495         dprintf(("ntfs_ntrele: rele ntnode %d: %p, usecount: %d\n",
  496                 ip->i_number, ip, ip->i_usecount));
  497 
  498         mtx_lock(&ip->i_interlock);
  499         ip->i_usecount--;
  500 
  501         if (ip->i_usecount < 0)
  502                 panic("ntfs_ntrele: ino: %d usecount: %d \n",
  503                       ip->i_number,ip->i_usecount);
  504         mtx_unlock(&ip->i_interlock);
  505 }
  506 
  507 /*
  508  * Deallocate all memory allocated for ntvattr
  509  */
  510 void
  511 ntfs_freentvattr(vap)
  512         struct ntvattr * vap;
  513 {
  514         if (vap->va_flag & NTFS_AF_INRUN) {
  515                 if (vap->va_vruncn)
  516                         free(vap->va_vruncn, M_NTFSRUN);
  517                 if (vap->va_vruncl)
  518                         free(vap->va_vruncl, M_NTFSRUN);
  519         } else {
  520                 if (vap->va_datap)
  521                         free(vap->va_datap, M_NTFSRDATA);
  522         }
  523         free(vap, M_NTFSNTVATTR);
  524 }
  525 
  526 /*
  527  * Convert disk image of attribute into ntvattr structure,
  528  * runs are expanded also.
  529  */
  530 int
  531 ntfs_attrtontvattr(
  532                    struct ntfsmount * ntmp,
  533                    struct ntvattr ** rvapp,
  534                    struct attr * rap)
  535 {
  536         int             error, i;
  537         struct ntvattr *vap;
  538 
  539         error = 0;
  540         *rvapp = NULL;
  541 
  542         vap = malloc(sizeof(struct ntvattr),
  543                 M_NTFSNTVATTR, M_WAITOK | M_ZERO);
  544         vap->va_ip = NULL;
  545         vap->va_flag = rap->a_hdr.a_flag;
  546         vap->va_type = rap->a_hdr.a_type;
  547         vap->va_compression = rap->a_hdr.a_compression;
  548         vap->va_index = rap->a_hdr.a_index;
  549 
  550         ddprintf(("type: 0x%x, index: %d", vap->va_type, vap->va_index));
  551 
  552         vap->va_namelen = rap->a_hdr.a_namelen;
  553         if (rap->a_hdr.a_namelen) {
  554                 wchar *unp = (wchar *) ((caddr_t) rap + rap->a_hdr.a_nameoff);
  555                 ddprintf((", name:["));
  556                 for (i = 0; i < vap->va_namelen; i++) {
  557                         vap->va_name[i] = unp[i];
  558                         ddprintf(("%c", vap->va_name[i]));
  559                 }
  560                 ddprintf(("]"));
  561         }
  562         if (vap->va_flag & NTFS_AF_INRUN) {
  563                 ddprintf((", nonres."));
  564                 vap->va_datalen = rap->a_nr.a_datalen;
  565                 vap->va_allocated = rap->a_nr.a_allocated;
  566                 vap->va_vcnstart = rap->a_nr.a_vcnstart;
  567                 vap->va_vcnend = rap->a_nr.a_vcnend;
  568                 vap->va_compressalg = rap->a_nr.a_compressalg;
  569                 error = ntfs_runtovrun(&(vap->va_vruncn), &(vap->va_vruncl),
  570                                        &(vap->va_vruncnt),
  571                                        (caddr_t) rap + rap->a_nr.a_dataoff);
  572         } else {
  573                 vap->va_compressalg = 0;
  574                 ddprintf((", res."));
  575                 vap->va_datalen = rap->a_r.a_datalen;
  576                 vap->va_allocated = rap->a_r.a_datalen;
  577                 vap->va_vcnstart = 0;
  578                 vap->va_vcnend = ntfs_btocn(vap->va_allocated);
  579                 vap->va_datap = malloc(vap->va_datalen,
  580                        M_NTFSRDATA, M_WAITOK);
  581                 memcpy(vap->va_datap, (caddr_t) rap + rap->a_r.a_dataoff,
  582                        rap->a_r.a_datalen);
  583         }
  584         ddprintf((", len: %d", vap->va_datalen));
  585 
  586         if (error)
  587                 free(vap, M_NTFSNTVATTR);
  588         else
  589                 *rvapp = vap;
  590 
  591         ddprintf(("\n"));
  592 
  593         return (error);
  594 }
  595 
  596 /*
  597  * Expand run into more utilizable and more memory eating format.
  598  */
  599 int
  600 ntfs_runtovrun(
  601                cn_t ** rcnp,
  602                cn_t ** rclp,
  603                u_long * rcntp,
  604                u_int8_t * run)
  605 {
  606         u_int32_t       off;
  607         u_int32_t       sz, i;
  608         cn_t           *cn;
  609         cn_t           *cl;
  610         u_long          cnt;
  611         cn_t            prev;
  612         cn_t            tmp;
  613 
  614         off = 0;
  615         cnt = 0;
  616         i = 0;
  617         while (run[off]) {
  618                 off += (run[off] & 0xF) + ((run[off] >> 4) & 0xF) + 1;
  619                 cnt++;
  620         }
  621         cn = malloc(cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
  622         cl = malloc(cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
  623 
  624         off = 0;
  625         cnt = 0;
  626         prev = 0;
  627         while (run[off]) {
  628 
  629                 sz = run[off++];
  630                 cl[cnt] = 0;
  631 
  632                 for (i = 0; i < (sz & 0xF); i++)
  633                         cl[cnt] += (u_int32_t) run[off++] << (i << 3);
  634 
  635                 sz >>= 4;
  636                 if (run[off + sz - 1] & 0x80) {
  637                         tmp = ((u_int64_t) - 1) << (sz << 3);
  638                         for (i = 0; i < sz; i++)
  639                                 tmp |= (u_int64_t) run[off++] << (i << 3);
  640                 } else {
  641                         tmp = 0;
  642                         for (i = 0; i < sz; i++)
  643                                 tmp |= (u_int64_t) run[off++] << (i << 3);
  644                 }
  645                 if (tmp)
  646                         prev = cn[cnt] = prev + tmp;
  647                 else
  648                         cn[cnt] = tmp;
  649 
  650                 cnt++;
  651         }
  652         *rcnp = cn;
  653         *rclp = cl;
  654         *rcntp = cnt;
  655         return (0);
  656 }
  657 
  658 /*
  659  * Compare unicode and ascii string case insens.
  660  */
  661 static int
  662 ntfs_uastricmp(ntmp, ustr, ustrlen, astr, astrlen)
  663         struct ntfsmount *ntmp;
  664         const wchar *ustr;
  665         size_t ustrlen;
  666         const char *astr;
  667         size_t astrlen;
  668 {
  669         const char *astrp = astr;
  670         char tmpbuf[5];
  671         int len, res;
  672         size_t i, j, mbstrlen = astrlen;
  673 
  674         if (ntmp->ntm_ic_l2u) {
  675                 for (i = 0, j = 0; i < ustrlen && j < astrlen; i++) {
  676                         len = 4;
  677                         res = ((int) NTFS_TOUPPER(ustr[i])) -
  678                             ((int)NTFS_TOUPPER(NTFS_82U(astrp, &len)));
  679                         astrp += len;
  680                         j += len;
  681                         mbstrlen -= len - 1;
  682 
  683                         if (res)
  684                                 return res;
  685                 }
  686         } else {
  687                 /*
  688                  * We use NTFS_82U(NTFS_U28(c)) to get rid of unicode
  689                  * symbols not covered by translation table
  690                  */
  691                 for (i = 0; i < ustrlen && i < astrlen; i++) {
  692                         res = ((int) NTFS_TOUPPER(NTFS_82U(NTFS_U28(ustr[i]), &len))) -
  693                                 ((int)NTFS_TOUPPER(NTFS_82U(astrp, &len)));
  694                         astrp++;
  695                         if (res)
  696                                 return res;
  697                 }
  698         }
  699         return (ustrlen - mbstrlen);
  700 }
  701 
  702 /*
  703  * Compare unicode and ascii string case sens.
  704  */
  705 static int
  706 ntfs_uastrcmp(ntmp, ustr, ustrlen, astr, astrlen)
  707         struct ntfsmount *ntmp;
  708         const wchar *ustr;
  709         size_t ustrlen;
  710         const char *astr;
  711         size_t astrlen;
  712 {
  713         char *c, tmpbuf[5];
  714         size_t i, j, mbstrlen = astrlen;
  715         int res;
  716 
  717         for (i = 0, j = 0; (i < ustrlen) && (j < astrlen); i++, mbstrlen++) {
  718                 c = NTFS_U28(ustr[i]);
  719                 while (*c != '\0') {
  720                         res = (int) (*c++ - astr[j++]);
  721                         if (res)
  722                                 return res;
  723                         mbstrlen--;
  724                 }
  725         }
  726         return (ustrlen - mbstrlen);
  727 }
  728 
  729 /* 
  730  * Search fnode in ntnode, if not found allocate and preinitialize.
  731  *
  732  * ntnode should be locked on entry.
  733  */
  734 int
  735 ntfs_fget(
  736         struct ntfsmount *ntmp,
  737         struct ntnode *ip,
  738         int attrtype,
  739         char *attrname,
  740         struct fnode **fpp)
  741 {
  742         struct fnode *fp;
  743 
  744         dprintf(("ntfs_fget: ino: %d, attrtype: 0x%x, attrname: %s\n",
  745                 ip->i_number,attrtype, attrname?attrname:""));
  746         *fpp = NULL;
  747         LIST_FOREACH(fp, &ip->i_fnlist, f_fnlist){
  748                 dprintf(("ntfs_fget: fnode: attrtype: %d, attrname: %s\n",
  749                         fp->f_attrtype, fp->f_attrname?fp->f_attrname:""));
  750 
  751                 if ((attrtype == fp->f_attrtype) && 
  752                     ((!attrname && !fp->f_attrname) ||
  753                      (attrname && fp->f_attrname &&
  754                       !strcmp(attrname,fp->f_attrname)))){
  755                         dprintf(("ntfs_fget: found existed: %p\n",fp));
  756                         *fpp = fp;
  757                 }
  758         }
  759 
  760         if (*fpp)
  761                 return (0);
  762 
  763         fp = malloc(sizeof(struct fnode), M_NTFSFNODE,
  764                 M_WAITOK | M_ZERO);
  765         dprintf(("ntfs_fget: allocating fnode: %p\n",fp));
  766 
  767         fp->f_ip = ip;
  768         if (attrname) {
  769                 fp->f_flag |= FN_AATTRNAME;
  770                 fp->f_attrname = malloc(strlen(attrname)+1, M_TEMP, M_WAITOK);
  771                 strcpy(fp->f_attrname, attrname);
  772         } else
  773                 fp->f_attrname = NULL;
  774         fp->f_attrtype = attrtype;
  775 
  776         ntfs_ntref(ip);
  777 
  778         LIST_INSERT_HEAD(&ip->i_fnlist, fp, f_fnlist);
  779 
  780         *fpp = fp;
  781 
  782         return (0);
  783 }
  784 
  785 /*
  786  * Deallocate fnode, remove it from ntnode's fnode list.
  787  *
  788  * ntnode should be locked.
  789  */
  790 void
  791 ntfs_frele(
  792         struct fnode *fp)
  793 {
  794         struct ntnode *ip = FTONT(fp);
  795 
  796         dprintf(("ntfs_frele: fnode: %p for %d: %p\n", fp, ip->i_number, ip));
  797 
  798         dprintf(("ntfs_frele: deallocating fnode\n"));
  799         LIST_REMOVE(fp,f_fnlist);
  800         if (fp->f_flag & FN_AATTRNAME)
  801                 free(fp->f_attrname, M_TEMP);
  802         if (fp->f_dirblbuf)
  803                 free(fp->f_dirblbuf, M_NTFSDIR);
  804         free(fp, M_NTFSFNODE);
  805         ntfs_ntrele(ip);
  806 }
  807 
  808 /*
  809  * Lookup attribute name in format: [[:$ATTR_TYPE]:$ATTR_NAME], 
  810  * $ATTR_TYPE is searched in attrdefs read from $AttrDefs.
  811  * If $ATTR_TYPE nott specifed, ATTR_A_DATA assumed.
  812  */
  813 static int
  814 ntfs_ntlookupattr(
  815                 struct ntfsmount * ntmp,
  816                 const char * name,
  817                 int namelen,
  818                 int *attrtype,
  819                 char **attrname)
  820 {
  821         const char *sys;
  822         size_t syslen, i;
  823         struct ntvattrdef *adp;
  824 
  825         if (namelen == 0)
  826                 return (0);
  827 
  828         if (name[0] == '$') {
  829                 sys = name;
  830                 for (syslen = 0; syslen < namelen; syslen++) {
  831                         if(sys[syslen] == ':') {
  832                                 name++;
  833                                 namelen--;
  834                                 break;
  835                         }
  836                 }
  837                 name += syslen;
  838                 namelen -= syslen;
  839 
  840                 adp = ntmp->ntm_ad;
  841                 for (i = 0; i < ntmp->ntm_adnum; i++, adp++){
  842                         if (syslen != adp->ad_namelen || 
  843                            strncmp(sys, adp->ad_name, syslen) != 0)
  844                                 continue;
  845 
  846                         *attrtype = adp->ad_type;
  847                         goto out;
  848                 }
  849                 return (ENOENT);
  850         } else
  851                 *attrtype = NTFS_A_DATA;
  852 
  853     out:
  854         if (namelen) {
  855                 (*attrname) = malloc(namelen, M_TEMP, M_WAITOK);
  856                 memcpy((*attrname), name, namelen);
  857                 (*attrname)[namelen] = '\0';
  858         }
  859 
  860         return (0);
  861 }
  862 
  863 /*
  864  * Lookup specifed node for filename, matching cnp,
  865  * return fnode filled.
  866  */
  867 int
  868 ntfs_ntlookupfile(
  869               struct ntfsmount * ntmp,
  870               struct vnode * vp,
  871               struct componentname * cnp,
  872               struct vnode ** vpp)
  873 {
  874         struct fnode   *fp = VTOF(vp);
  875         struct ntnode  *ip = FTONT(fp);
  876         struct ntvattr *vap;    /* Root attribute */
  877         cn_t            cn;     /* VCN in current attribute */
  878         caddr_t         rdbuf;  /* Buffer to read directory's blocks  */
  879         u_int32_t       blsize;
  880         u_int64_t       rdsize; /* Length of data to read from current block */
  881         struct attr_indexentry *iep;
  882         int             error, res, anamelen, fnamelen;
  883         const char     *fname,*aname;
  884         u_int32_t       aoff;
  885         int attrtype = NTFS_A_DATA;
  886         char *attrname = NULL;
  887         struct fnode   *nfp;
  888         struct vnode   *nvp;
  889         enum vtype      f_type;
  890 
  891         error = ntfs_ntget(ip);
  892         if (error)
  893                 return (error);
  894 
  895         error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
  896         if (error || (vap->va_flag & NTFS_AF_INRUN))
  897                 return (ENOTDIR);
  898 
  899         blsize = vap->va_a_iroot->ir_size;
  900         rdsize = vap->va_datalen;
  901 
  902         /*
  903          * Divide file name into: foofilefoofilefoofile[:attrspec]
  904          * Store like this:       fname:fnamelen       [aname:anamelen]
  905          */
  906         fname = cnp->cn_nameptr;
  907         aname = NULL;
  908         anamelen = 0;
  909         for (fnamelen = 0; fnamelen < cnp->cn_namelen; fnamelen++)
  910                 if(fname[fnamelen] == ':') {
  911                         aname = fname + fnamelen + 1;
  912                         anamelen = cnp->cn_namelen - fnamelen - 1;
  913                         dprintf(("ntfs_ntlookupfile: %s (%d), attr: %s (%d)\n",
  914                                 fname, fnamelen, aname, anamelen));
  915                         break;
  916                 }
  917 
  918         dprintf(("ntfs_ntlookupfile: blksz: %d, rdsz: %jd\n", blsize, rdsize));
  919 
  920         rdbuf = malloc(blsize, M_TEMP, M_WAITOK);
  921 
  922         error = ntfs_readattr(ntmp, ip, NTFS_A_INDXROOT, "$I30",
  923                                0, rdsize, rdbuf, NULL);
  924         if (error)
  925                 goto fail;
  926 
  927         aoff = sizeof(struct attr_indexroot);
  928 
  929         do {
  930                 iep = (struct attr_indexentry *) (rdbuf + aoff);
  931 
  932                 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
  933                         aoff += iep->reclen,
  934                         iep = (struct attr_indexentry *) (rdbuf + aoff))
  935                 {
  936                         ddprintf(("scan: %d, %d\n",
  937                                   (u_int32_t) iep->ie_number,
  938                                   (u_int32_t) iep->ie_fnametype));
  939 
  940                         /* check the name - the case-insensitible check
  941                          * has to come first, to break from this for loop
  942                          * if needed, so we can dive correctly */
  943                         res = NTFS_UASTRICMP(iep->ie_fname, iep->ie_fnamelen,
  944                                 fname, fnamelen);
  945                         if (res > 0) break;
  946                         if (res < 0) continue;
  947 
  948                         if (iep->ie_fnametype == 0 ||
  949                             !(ntmp->ntm_flag & NTFS_MFLAG_CASEINS))
  950                         {
  951                                 res = NTFS_UASTRCMP(iep->ie_fname,
  952                                         iep->ie_fnamelen, fname, fnamelen);
  953                                 if (res != 0) continue;
  954                         }
  955 
  956                         if (aname) {
  957                                 error = ntfs_ntlookupattr(ntmp,
  958                                         aname, anamelen,
  959                                         &attrtype, &attrname);
  960                                 if (error)
  961                                         goto fail;
  962                         }
  963 
  964                         /* Check if we've found ourself */
  965                         if ((iep->ie_number == ip->i_number) &&
  966                             (attrtype == fp->f_attrtype) &&
  967                             ((!attrname && !fp->f_attrname) ||
  968                              (attrname && fp->f_attrname &&
  969                               !strcmp(attrname, fp->f_attrname))))
  970                         {
  971                                 VREF(vp);
  972                                 *vpp = vp;
  973                                 error = 0;
  974                                 goto fail;
  975                         }
  976 
  977                         /* vget node, but don't load it */
  978                         error = ntfs_vgetex(ntmp->ntm_mountp,
  979                                    iep->ie_number, attrtype, attrname,
  980                                    LK_EXCLUSIVE, VG_DONTLOADIN | VG_DONTVALIDFN,
  981                                    curthread, &nvp);
  982 
  983                         /* free the buffer returned by ntfs_ntlookupattr() */
  984                         if (attrname) {
  985                                 free(attrname, M_TEMP);
  986                                 attrname = NULL;
  987                         }
  988 
  989                         if (error)
  990                                 goto fail;
  991 
  992                         nfp = VTOF(nvp);
  993 
  994                         if (nfp->f_flag & FN_VALID) {
  995                                 *vpp = nvp;
  996                                 goto fail;
  997                         }
  998 
  999                         nfp->f_fflag = iep->ie_fflag;
 1000                         nfp->f_pnumber = iep->ie_fpnumber;
 1001                         nfp->f_times = iep->ie_ftimes;
 1002 
 1003                         if((nfp->f_fflag & NTFS_FFLAG_DIR) &&
 1004                            (nfp->f_attrtype == NTFS_A_DATA) &&
 1005                            (nfp->f_attrname == NULL))
 1006                                 f_type = VDIR;  
 1007                         else
 1008                                 f_type = VREG;  
 1009 
 1010                         nvp->v_type = f_type;
 1011 
 1012                         if ((nfp->f_attrtype == NTFS_A_DATA) &&
 1013                             (nfp->f_attrname == NULL))
 1014                         {
 1015                                 /* Opening default attribute */
 1016                                 nfp->f_size = iep->ie_fsize;
 1017                                 nfp->f_allocated = iep->ie_fallocated;
 1018                                 nfp->f_flag |= FN_PRELOADED;
 1019                         } else {
 1020                                 error = ntfs_filesize(ntmp, nfp,
 1021                                             &nfp->f_size, &nfp->f_allocated);
 1022                                 if (error) {
 1023                                         vput(nvp);
 1024                                         goto fail;
 1025                                 }
 1026                         }
 1027 
 1028                         nfp->f_flag &= ~FN_VALID;
 1029                         *vpp = nvp;
 1030                         goto fail;
 1031                 }
 1032 
 1033                 /* Dive if possible */
 1034                 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) {
 1035                         dprintf(("ntfs_ntlookupfile: diving\n"));
 1036 
 1037                         cn = *(cn_t *) (rdbuf + aoff +
 1038                                         iep->reclen - sizeof(cn_t));
 1039                         rdsize = blsize;
 1040 
 1041                         error = ntfs_readattr(ntmp, ip, NTFS_A_INDX, "$I30",
 1042                                         ntfs_cntob(cn), rdsize, rdbuf, NULL);
 1043                         if (error)
 1044                                 goto fail;
 1045 
 1046                         error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
 1047                                                 rdbuf, rdsize);
 1048                         if (error)
 1049                                 goto fail;
 1050 
 1051                         aoff = (((struct attr_indexalloc *) rdbuf)->ia_hdrsize +
 1052                                 0x18);
 1053                 } else {
 1054                         dprintf(("ntfs_ntlookupfile: nowhere to dive :-(\n"));
 1055                         error = ENOENT;
 1056                         break;
 1057                 }
 1058         } while (1);
 1059 
 1060         dprintf(("finish\n"));
 1061 
 1062 fail:
 1063         if (attrname) free(attrname, M_TEMP);
 1064         ntfs_ntvattrrele(vap);
 1065         ntfs_ntput(ip);
 1066         free(rdbuf, M_TEMP);
 1067         return (error);
 1068 }
 1069 
 1070 /*
 1071  * Check if name type is permitted to show.
 1072  */
 1073 int
 1074 ntfs_isnamepermitted(
 1075                      struct ntfsmount * ntmp,
 1076                      struct attr_indexentry * iep)
 1077 {
 1078         if (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)
 1079                 return 1;
 1080 
 1081         switch (iep->ie_fnametype) {
 1082         case 2:
 1083                 ddprintf(("ntfs_isnamepermitted: skipped DOS name\n"));
 1084                 return 0;
 1085         case 0: case 1: case 3:
 1086                 return 1;
 1087         default:
 1088                 printf("ntfs_isnamepermitted: " \
 1089                        "WARNING! Unknown file name type: %d\n",
 1090                        iep->ie_fnametype);
 1091                 break;
 1092         }
 1093         return 0;
 1094 }
 1095 
 1096 /*
 1097  * Read ntfs dir like stream of attr_indexentry, not like btree of them.
 1098  * This is done by scaning $BITMAP:$I30 for busy clusters and reading them.
 1099  * Ofcouse $INDEX_ROOT:$I30 is read before. Last read values are stored in
 1100  * fnode, so we can skip toward record number num almost immediatly.
 1101  * Anyway this is rather slow routine. The problem is that we don't know
 1102  * how many records are there in $INDEX_ALLOCATION:$I30 block.
 1103  */
 1104 int
 1105 ntfs_ntreaddir(
 1106                struct ntfsmount * ntmp,
 1107                struct fnode * fp,
 1108                u_int32_t num,
 1109                struct attr_indexentry ** riepp)
 1110 {
 1111         struct ntnode  *ip = FTONT(fp);
 1112         struct ntvattr *vap = NULL;     /* IndexRoot attribute */
 1113         struct ntvattr *bmvap = NULL;   /* BitMap attribute */
 1114         struct ntvattr *iavap = NULL;   /* IndexAllocation attribute */
 1115         caddr_t         rdbuf;          /* Buffer to read directory's blocks  */
 1116         u_int8_t       *bmp = NULL;     /* Bitmap */
 1117         u_int32_t       blsize;         /* Index allocation size (2048) */
 1118         u_int32_t       rdsize;         /* Length of data to read */
 1119         u_int32_t       attrnum;        /* Current attribute type */
 1120         u_int32_t       cpbl = 1;       /* Clusters per directory block */
 1121         u_int32_t       blnum;
 1122         struct attr_indexentry *iep;
 1123         int             error = ENOENT;
 1124         u_int32_t       aoff, cnum;
 1125 
 1126         dprintf(("ntfs_ntreaddir: read ino: %d, num: %d\n", ip->i_number, num));
 1127         error = ntfs_ntget(ip);
 1128         if (error)
 1129                 return (error);
 1130 
 1131         error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
 1132         if (error)
 1133                 return (ENOTDIR);
 1134 
 1135         if (fp->f_dirblbuf == NULL) {
 1136                 fp->f_dirblsz = vap->va_a_iroot->ir_size;
 1137                 fp->f_dirblbuf = malloc(max(vap->va_datalen,fp->f_dirblsz),
 1138                     M_NTFSDIR, M_WAITOK);
 1139         }
 1140 
 1141         blsize = fp->f_dirblsz;
 1142         rdbuf = fp->f_dirblbuf;
 1143 
 1144         dprintf(("ntfs_ntreaddir: rdbuf: %p, blsize: %d\n", rdbuf, blsize));
 1145 
 1146         if (vap->va_a_iroot->ir_flag & NTFS_IRFLAG_INDXALLOC) {
 1147                 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXBITMAP, "$I30",
 1148                                         0, &bmvap);
 1149                 if (error) {
 1150                         error = ENOTDIR;
 1151                         goto fail;
 1152                 }
 1153                 bmp = malloc(bmvap->va_datalen, M_TEMP, M_WAITOK);
 1154                 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 0,
 1155                                        bmvap->va_datalen, bmp, NULL);
 1156                 if (error)
 1157                         goto fail;
 1158 
 1159                 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDX, "$I30",
 1160                                         0, &iavap);
 1161                 if (error) {
 1162                         error = ENOTDIR;
 1163                         goto fail;
 1164                 }
 1165                 cpbl = ntfs_btocn(blsize + ntfs_cntob(1) - 1);
 1166                 dprintf(("ntfs_ntreaddir: indexalloc: %jd, cpbl: %d\n",
 1167                          iavap->va_datalen, cpbl));
 1168         } else {
 1169                 dprintf(("ntfs_ntreadidir: w/o BitMap and IndexAllocation\n"));
 1170                 iavap = bmvap = NULL;
 1171                 bmp = NULL;
 1172         }
 1173 
 1174         /* Try use previous values */
 1175         if ((fp->f_lastdnum < num) && (fp->f_lastdnum != 0)) {
 1176                 attrnum = fp->f_lastdattr;
 1177                 aoff = fp->f_lastdoff;
 1178                 blnum = fp->f_lastdblnum;
 1179                 cnum = fp->f_lastdnum;
 1180         } else {
 1181                 attrnum = NTFS_A_INDXROOT;
 1182                 aoff = sizeof(struct attr_indexroot);
 1183                 blnum = 0;
 1184                 cnum = 0;
 1185         }
 1186 
 1187         do {
 1188                 dprintf(("ntfs_ntreaddir: scan: 0x%x, %d, %d, %d, %d\n",
 1189                          attrnum, (u_int32_t) blnum, cnum, num, aoff));
 1190                 rdsize = (attrnum == NTFS_A_INDXROOT) ? vap->va_datalen : blsize;
 1191                 error = ntfs_readattr(ntmp, ip, attrnum, "$I30",
 1192                                 ntfs_cntob(blnum * cpbl), rdsize, rdbuf, NULL);
 1193                 if (error)
 1194                         goto fail;
 1195 
 1196                 if (attrnum == NTFS_A_INDX) {
 1197                         error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
 1198                                                 rdbuf, rdsize);
 1199                         if (error)
 1200                                 goto fail;
 1201                 }
 1202                 if (aoff == 0)
 1203                         aoff = (attrnum == NTFS_A_INDX) ?
 1204                                 (0x18 + ((struct attr_indexalloc *) rdbuf)->ia_hdrsize) :
 1205                                 sizeof(struct attr_indexroot);
 1206 
 1207                 iep = (struct attr_indexentry *) (rdbuf + aoff);
 1208                 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
 1209                         aoff += iep->reclen,
 1210                         iep = (struct attr_indexentry *) (rdbuf + aoff))
 1211                 {
 1212                         if (!ntfs_isnamepermitted(ntmp, iep)) continue;
 1213 
 1214                         if (cnum >= num) {
 1215                                 fp->f_lastdnum = cnum;
 1216                                 fp->f_lastdoff = aoff;
 1217                                 fp->f_lastdblnum = blnum;
 1218                                 fp->f_lastdattr = attrnum;
 1219 
 1220                                 *riepp = iep;
 1221 
 1222                                 error = 0;
 1223                                 goto fail;
 1224                         }
 1225                         cnum++;
 1226                 }
 1227 
 1228                 if (iavap) {
 1229                         if (attrnum == NTFS_A_INDXROOT)
 1230                                 blnum = 0;
 1231                         else
 1232                                 blnum++;
 1233 
 1234                         while (ntfs_cntob(blnum * cpbl) < iavap->va_datalen) {
 1235                                 if (bmp[blnum >> 3] & (1 << (blnum & 7)))
 1236                                         break;
 1237                                 blnum++;
 1238                         }
 1239 
 1240                         attrnum = NTFS_A_INDX;
 1241                         aoff = 0;
 1242                         if (ntfs_cntob(blnum * cpbl) >= iavap->va_datalen)
 1243                                 break;
 1244                         dprintf(("ntfs_ntreaddir: blnum: %d\n", (u_int32_t) blnum));
 1245                 }
 1246         } while (iavap);
 1247 
 1248         *riepp = NULL;
 1249         fp->f_lastdnum = 0;
 1250 
 1251 fail:
 1252         if (vap)
 1253                 ntfs_ntvattrrele(vap);
 1254         if (bmvap)
 1255                 ntfs_ntvattrrele(bmvap);
 1256         if (iavap)
 1257                 ntfs_ntvattrrele(iavap);
 1258         if (bmp)
 1259                 free(bmp, M_TEMP);
 1260         ntfs_ntput(ip);
 1261         return (error);
 1262 }
 1263 
 1264 /*
 1265  * Convert NTFS times that are in 100 ns units and begins from
 1266  * 1601 Jan 1 into unix times.
 1267  */
 1268 struct timespec
 1269 ntfs_nttimetounix(
 1270                   u_int64_t nt)
 1271 {
 1272         struct timespec t;
 1273 
 1274         /* WindowNT times are in 100 ns and from 1601 Jan 1 */
 1275         t.tv_nsec = (nt % (1000 * 1000 * 10)) * 100;
 1276         t.tv_sec = nt / (1000 * 1000 * 10) -
 1277                 369LL * 365LL * 24LL * 60LL * 60LL -
 1278                 89LL * 1LL * 24LL * 60LL * 60LL;
 1279         return (t);
 1280 }
 1281 
 1282 /*
 1283  * Get file times from NTFS_A_NAME attribute.
 1284  */
 1285 int
 1286 ntfs_times(
 1287            struct ntfsmount * ntmp,
 1288            struct ntnode * ip,
 1289            ntfs_times_t * tm)
 1290 {
 1291         struct ntvattr *vap;
 1292         int             error;
 1293 
 1294         dprintf(("ntfs_times: ino: %d...\n", ip->i_number));
 1295 
 1296         error = ntfs_ntget(ip);
 1297         if (error)
 1298                 return (error);
 1299 
 1300         error = ntfs_ntvattrget(ntmp, ip, NTFS_A_NAME, NULL, 0, &vap);
 1301         if (error) {
 1302                 ntfs_ntput(ip);
 1303                 return (error);
 1304         }
 1305         *tm = vap->va_a_name->n_times;
 1306         ntfs_ntvattrrele(vap);
 1307         ntfs_ntput(ip);
 1308 
 1309         return (0);
 1310 }
 1311 
 1312 /*
 1313  * Get file sizes from corresponding attribute. 
 1314  * 
 1315  * ntnode under fnode should be locked.
 1316  */
 1317 int
 1318 ntfs_filesize(
 1319               struct ntfsmount * ntmp,
 1320               struct fnode * fp,
 1321               u_int64_t * size,
 1322               u_int64_t * bytes)
 1323 {
 1324         struct ntvattr *vap;
 1325         struct ntnode *ip = FTONT(fp);
 1326         u_int64_t       sz, bn;
 1327         int             error;
 1328 
 1329         dprintf(("ntfs_filesize: ino: %d\n", ip->i_number));
 1330 
 1331         error = ntfs_ntvattrget(ntmp, ip,
 1332                 fp->f_attrtype, fp->f_attrname, 0, &vap);
 1333         if (error)
 1334                 return (error);
 1335 
 1336         bn = vap->va_allocated;
 1337         sz = vap->va_datalen;
 1338 
 1339         dprintf(("ntfs_filesize: %d bytes (%d bytes allocated)\n",
 1340                 (u_int32_t) sz, (u_int32_t) bn));
 1341 
 1342         if (size)
 1343                 *size = sz;
 1344         if (bytes)
 1345                 *bytes = bn;
 1346 
 1347         ntfs_ntvattrrele(vap);
 1348 
 1349         return (0);
 1350 }
 1351 
 1352 /*
 1353  * This is one of write routine.
 1354  */
 1355 int
 1356 ntfs_writeattr_plain(
 1357         struct ntfsmount * ntmp,
 1358         struct ntnode * ip,
 1359         u_int32_t attrnum,      
 1360         char *attrname,
 1361         off_t roff,
 1362         size_t rsize,
 1363         void *rdata,
 1364         size_t * initp,
 1365         struct uio *uio)
 1366 {
 1367         size_t          init;
 1368         int             error = 0;
 1369         off_t           off = roff, left = rsize, towrite;
 1370         caddr_t         data = rdata;
 1371         struct ntvattr *vap;
 1372         *initp = 0;
 1373 
 1374         while (left) {
 1375                 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
 1376                                         ntfs_btocn(off), &vap);
 1377                 if (error)
 1378                         return (error);
 1379                 towrite = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off);
 1380                 ddprintf(("ntfs_writeattr_plain: o: %d, s: %d (%d - %d)\n",
 1381                          (u_int32_t) off, (u_int32_t) towrite,
 1382                          (u_int32_t) vap->va_vcnstart,
 1383                          (u_int32_t) vap->va_vcnend));
 1384                 error = ntfs_writentvattr_plain(ntmp, ip, vap,
 1385                                          off - ntfs_cntob(vap->va_vcnstart),
 1386                                          towrite, data, &init, uio);
 1387                 if (error) {
 1388                         printf("ntfs_writeattr_plain: " \
 1389                                "ntfs_writentvattr_plain failed: o: %d, s: %d\n",
 1390                                (u_int32_t) off, (u_int32_t) towrite);
 1391                         printf("ntfs_writeattr_plain: attrib: %d - %d\n",
 1392                                (u_int32_t) vap->va_vcnstart, 
 1393                                (u_int32_t) vap->va_vcnend);
 1394                         ntfs_ntvattrrele(vap);
 1395                         break;
 1396                 }
 1397                 ntfs_ntvattrrele(vap);
 1398                 left -= towrite;
 1399                 off += towrite;
 1400                 data = data + towrite;
 1401                 *initp += init;
 1402         }
 1403 
 1404         return (error);
 1405 }
 1406 
 1407 /*
 1408  * This is one of write routine.
 1409  *
 1410  * ntnode should be locked.
 1411  */
 1412 int
 1413 ntfs_writentvattr_plain(
 1414         struct ntfsmount * ntmp,
 1415         struct ntnode * ip,
 1416         struct ntvattr * vap,
 1417         off_t roff,
 1418         size_t rsize,
 1419         void *rdata,
 1420         size_t * initp,
 1421         struct uio *uio)
 1422 {
 1423         int             error = 0;
 1424         off_t           off;
 1425         int             cnt;
 1426         cn_t            ccn, ccl, cn, left, cl;
 1427         caddr_t         data = rdata;
 1428         struct buf     *bp;
 1429         size_t          tocopy;
 1430 
 1431         *initp = 0;
 1432 
 1433         if ((vap->va_flag & NTFS_AF_INRUN) == 0) {
 1434                 printf("ntfs_writevattr_plain: CAN'T WRITE RES. ATTRIBUTE\n");
 1435                 return ENOTTY;
 1436         }
 1437 
 1438         ddprintf(("ntfs_writentvattr_plain: data in run: %ld chains\n",
 1439                  vap->va_vruncnt));
 1440 
 1441         off = roff;
 1442         left = rsize;
 1443         ccl = 0;
 1444         ccn = 0;
 1445         cnt = 0;
 1446         for (; left && (cnt < vap->va_vruncnt); cnt++) {
 1447                 ccn = vap->va_vruncn[cnt];
 1448                 ccl = vap->va_vruncl[cnt];
 1449 
 1450                 ddprintf(("ntfs_writentvattr_plain: " \
 1451                          "left %d, cn: 0x%x, cl: %d, off: %d\n", \
 1452                          (u_int32_t) left, (u_int32_t) ccn, \
 1453                          (u_int32_t) ccl, (u_int32_t) off));
 1454 
 1455                 if (ntfs_cntob(ccl) < off) {
 1456                         off -= ntfs_cntob(ccl);
 1457                         cnt++;
 1458                         continue;
 1459                 }
 1460                 if (!ccn && ip->i_number != NTFS_BOOTINO)
 1461                         continue; /* XXX */
 1462 
 1463                 ccl -= ntfs_btocn(off);
 1464                 cn = ccn + ntfs_btocn(off);
 1465                 off = ntfs_btocnoff(off);
 1466 
 1467                 while (left && ccl) {
 1468                         /*
 1469                          * Always read and write single clusters at a time -
 1470                          * we need to avoid requesting differently-sized
 1471                          * blocks at the same disk offsets to avoid
 1472                          * confusing the buffer cache.
 1473                          */
 1474                         tocopy = MIN(left, ntfs_cntob(1) - off);
 1475                         cl = ntfs_btocl(tocopy + off);
 1476                         KASSERT(cl == 1 && tocopy <= ntfs_cntob(1),
 1477                             ("single cluster limit mistake"));
 1478                         ddprintf(("ntfs_writentvattr_plain: write: " \
 1479                                 "cn: 0x%x cl: %d, off: %d len: %d, left: %d\n",
 1480                                 (u_int32_t) cn, (u_int32_t) cl, 
 1481                                 (u_int32_t) off, (u_int32_t) tocopy, 
 1482                                 (u_int32_t) left));
 1483                         if ((off == 0) && (tocopy == ntfs_cntob(cl)))
 1484                         {
 1485                                 bp = getblk(ntmp->ntm_devvp, ntfs_cntobn(cn),
 1486                                             ntfs_cntob(cl), 0, 0, 0);
 1487                                 clrbuf(bp);
 1488                         } else {
 1489                                 error = bread(ntmp->ntm_devvp, ntfs_cntobn(cn),
 1490                                               ntfs_cntob(cl), NOCRED, &bp);
 1491                                 if (error) {
 1492                                         brelse(bp);
 1493                                         return (error);
 1494                                 }
 1495                         }
 1496                         if (uio)
 1497                                 uiomove(bp->b_data + off, tocopy, uio);
 1498                         else
 1499                                 memcpy(bp->b_data + off, data, tocopy);
 1500                         bawrite(bp);
 1501                         data = data + tocopy;
 1502                         *initp += tocopy;
 1503                         off = 0;
 1504                         left -= tocopy;
 1505                         cn += cl;
 1506                         ccl -= cl;
 1507                 }
 1508         }
 1509 
 1510         if (left) {
 1511                 printf("ntfs_writentvattr_plain: POSSIBLE RUN ERROR\n");
 1512                 error = EINVAL;
 1513         }
 1514 
 1515         return (error);
 1516 }
 1517 
 1518 /*
 1519  * This is one of read routines.
 1520  *
 1521  * ntnode should be locked.
 1522  */
 1523 int
 1524 ntfs_readntvattr_plain(
 1525         struct ntfsmount * ntmp,
 1526         struct ntnode * ip,
 1527         struct ntvattr * vap,
 1528         off_t roff,
 1529         size_t rsize,
 1530         void *rdata,
 1531         size_t * initp,
 1532         struct uio *uio)
 1533 {
 1534         int             error = 0;
 1535         off_t           off;
 1536 
 1537         *initp = 0;
 1538         if (vap->va_flag & NTFS_AF_INRUN) {
 1539                 int             cnt;
 1540                 cn_t            ccn, ccl, cn, left, cl;
 1541                 caddr_t         data = rdata;
 1542                 struct buf     *bp;
 1543                 size_t          tocopy;
 1544 
 1545                 ddprintf(("ntfs_readntvattr_plain: data in run: %ld chains\n",
 1546                          vap->va_vruncnt));
 1547 
 1548                 off = roff;
 1549                 left = rsize;
 1550                 ccl = 0;
 1551                 ccn = 0;
 1552                 cnt = 0;
 1553                 while (left && (cnt < vap->va_vruncnt)) {
 1554                         ccn = vap->va_vruncn[cnt];
 1555                         ccl = vap->va_vruncl[cnt];
 1556 
 1557                         ddprintf(("ntfs_readntvattr_plain: " \
 1558                                  "left %d, cn: 0x%x, cl: %d, off: %d\n", \
 1559                                  (u_int32_t) left, (u_int32_t) ccn, \
 1560                                  (u_int32_t) ccl, (u_int32_t) off));
 1561 
 1562                         if (ntfs_cntob(ccl) < off) {
 1563                                 off -= ntfs_cntob(ccl);
 1564                                 cnt++;
 1565                                 continue;
 1566                         }
 1567                         if (ccn || ip->i_number == NTFS_BOOTINO) {
 1568                                 ccl -= ntfs_btocn(off);
 1569                                 cn = ccn + ntfs_btocn(off);
 1570                                 off = ntfs_btocnoff(off);
 1571 
 1572                                 while (left && ccl) {
 1573                                         /*
 1574                                          * Always read single clusters at a
 1575                                          * time - we need to avoid reading
 1576                                          * differently-sized blocks at the
 1577                                          * same disk offsets to avoid
 1578                                          * confusing the buffer cache.
 1579                                          */
 1580                                         tocopy = MIN(left,
 1581                                             ntfs_cntob(1) - off);
 1582                                         cl = ntfs_btocl(tocopy + off);
 1583                                         KASSERT(cl == 1 &&
 1584                                             tocopy <= ntfs_cntob(1),
 1585                                             ("single cluster limit mistake"));
 1586 
 1587                                         ddprintf(("ntfs_readntvattr_plain: " \
 1588                                                 "read: cn: 0x%x cl: %d, " \
 1589                                                 "off: %d len: %d, left: %d\n",
 1590                                                 (u_int32_t) cn, 
 1591                                                 (u_int32_t) cl, 
 1592                                                 (u_int32_t) off, 
 1593                                                 (u_int32_t) tocopy, 
 1594                                                 (u_int32_t) left));
 1595                                         error = bread(ntmp->ntm_devvp,
 1596                                                       ntfs_cntobn(cn),
 1597                                                       ntfs_cntob(cl),
 1598                                                       NOCRED, &bp);
 1599                                         if (error) {
 1600                                                 brelse(bp);
 1601                                                 return (error);
 1602                                         }
 1603                                         if (uio) {
 1604                                                 uiomove(bp->b_data + off,
 1605                                                         tocopy, uio);
 1606                                         } else {
 1607                                                 memcpy(data, bp->b_data + off,
 1608                                                         tocopy);
 1609                                         }
 1610                                         brelse(bp);
 1611                                         data = data + tocopy;
 1612                                         *initp += tocopy;
 1613                                         off = 0;
 1614                                         left -= tocopy;
 1615                                         cn += cl;
 1616                                         ccl -= cl;
 1617                                 }
 1618                         } else {
 1619                                 tocopy = MIN(left, ntfs_cntob(ccl) - off);
 1620                                 ddprintf(("ntfs_readntvattr_plain: "
 1621                                         "hole: ccn: 0x%x ccl: %d, off: %d, " \
 1622                                         " len: %d, left: %d\n", 
 1623                                         (u_int32_t) ccn, (u_int32_t) ccl, 
 1624                                         (u_int32_t) off, (u_int32_t) tocopy, 
 1625                                         (u_int32_t) left));
 1626                                 left -= tocopy;
 1627                                 off = 0;
 1628                                 if (uio) {
 1629                                         size_t remains = tocopy;
 1630                                         for(; remains; remains--)
 1631                                                 uiomove("", 1, uio);
 1632                                 } else 
 1633                                         bzero(data, tocopy);
 1634                                 data = data + tocopy;
 1635                         }
 1636                         cnt++;
 1637                 }
 1638                 if (left) {
 1639                         printf("ntfs_readntvattr_plain: POSSIBLE RUN ERROR\n");
 1640                         error = E2BIG;
 1641                 }
 1642         } else {
 1643                 ddprintf(("ntfs_readnvattr_plain: data is in mft record\n"));
 1644                 if (uio) 
 1645                         uiomove(vap->va_datap + roff, rsize, uio);
 1646                 else
 1647                         memcpy(rdata, vap->va_datap + roff, rsize);
 1648                 *initp += rsize;
 1649         }
 1650 
 1651         return (error);
 1652 }
 1653 
 1654 /*
 1655  * This is one of read routines.
 1656  */
 1657 int
 1658 ntfs_readattr_plain(
 1659         struct ntfsmount * ntmp,
 1660         struct ntnode * ip,
 1661         u_int32_t attrnum,      
 1662         char *attrname,
 1663         off_t roff,
 1664         size_t rsize,
 1665         void *rdata,
 1666         size_t * initp,
 1667         struct uio *uio)
 1668 {
 1669         size_t          init;
 1670         int             error = 0;
 1671         off_t           off = roff, left = rsize, toread;
 1672         caddr_t         data = rdata;
 1673         struct ntvattr *vap;
 1674         *initp = 0;
 1675 
 1676         while (left) {
 1677                 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
 1678                                         ntfs_btocn(off), &vap);
 1679                 if (error)
 1680                         return (error);
 1681                 toread = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off);
 1682                 ddprintf(("ntfs_readattr_plain: o: %d, s: %d (%d - %d)\n",
 1683                          (u_int32_t) off, (u_int32_t) toread,
 1684                          (u_int32_t) vap->va_vcnstart,
 1685                          (u_int32_t) vap->va_vcnend));
 1686                 error = ntfs_readntvattr_plain(ntmp, ip, vap,
 1687                                          off - ntfs_cntob(vap->va_vcnstart),
 1688                                          toread, data, &init, uio);
 1689                 if (error) {
 1690                         printf("ntfs_readattr_plain: " \
 1691                                "ntfs_readntvattr_plain failed: o: %d, s: %d\n",
 1692                                (u_int32_t) off, (u_int32_t) toread);
 1693                         printf("ntfs_readattr_plain: attrib: %d - %d\n",
 1694                                (u_int32_t) vap->va_vcnstart, 
 1695                                (u_int32_t) vap->va_vcnend);
 1696                         ntfs_ntvattrrele(vap);
 1697                         break;
 1698                 }
 1699                 ntfs_ntvattrrele(vap);
 1700                 left -= toread;
 1701                 off += toread;
 1702                 data = data + toread;
 1703                 *initp += init;
 1704         }
 1705 
 1706         return (error);
 1707 }
 1708 
 1709 /*
 1710  * This is one of read routines.
 1711  */
 1712 int
 1713 ntfs_readattr(
 1714         struct ntfsmount * ntmp,
 1715         struct ntnode * ip,
 1716         u_int32_t attrnum,
 1717         char *attrname,
 1718         off_t roff,
 1719         size_t rsize,
 1720         void *rdata,
 1721         struct uio *uio)
 1722 {
 1723         int             error = 0;
 1724         struct ntvattr *vap;
 1725         size_t          init;
 1726 
 1727         ddprintf(("ntfs_readattr: reading %d: 0x%x, from %d size %d bytes\n",
 1728                ip->i_number, attrnum, (u_int32_t) roff, (u_int32_t) rsize));
 1729 
 1730         error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 0, &vap);
 1731         if (error)
 1732                 return (error);
 1733 
 1734         if ((roff > vap->va_datalen) ||
 1735             (roff + rsize > vap->va_datalen)) {
 1736                 ddprintf(("ntfs_readattr: offset too big\n"));
 1737                 ntfs_ntvattrrele(vap);
 1738                 return (E2BIG);
 1739         }
 1740         if (vap->va_compression && vap->va_compressalg) {
 1741                 u_int8_t       *cup;
 1742                 u_int8_t       *uup;
 1743                 off_t           off = roff, left = rsize, tocopy;
 1744                 caddr_t         data = rdata;
 1745                 cn_t            cn;
 1746 
 1747                 ddprintf(("ntfs_ntreadattr: compression: %d\n",
 1748                          vap->va_compressalg));
 1749 
 1750                 cup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL),
 1751                        M_NTFSDECOMP, M_WAITOK);
 1752                 uup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL),
 1753                        M_NTFSDECOMP, M_WAITOK);
 1754 
 1755                 cn = (ntfs_btocn(roff)) & (~(NTFS_COMPUNIT_CL - 1));
 1756                 off = roff - ntfs_cntob(cn);
 1757 
 1758                 while (left) {
 1759                         error = ntfs_readattr_plain(ntmp, ip, attrnum,
 1760                                                   attrname, ntfs_cntob(cn),
 1761                                                   ntfs_cntob(NTFS_COMPUNIT_CL),
 1762                                                   cup, &init, NULL);
 1763                         if (error)
 1764                                 break;
 1765 
 1766                         tocopy = MIN(left, ntfs_cntob(NTFS_COMPUNIT_CL) - off);
 1767 
 1768                         if (init == ntfs_cntob(NTFS_COMPUNIT_CL)) {
 1769                                 if (uio)
 1770                                         uiomove(cup + off, tocopy, uio);
 1771                                 else
 1772                                         memcpy(data, cup + off, tocopy);
 1773                         } else if (init == 0) {
 1774                                 if (uio) {
 1775                                         size_t remains = tocopy;
 1776                                         for(; remains; remains--)
 1777                                                 uiomove("", 1, uio);
 1778                                 }
 1779                                 else
 1780                                         bzero(data, tocopy);
 1781                         } else {
 1782                                 error = ntfs_uncompunit(ntmp, uup, cup);
 1783                                 if (error)
 1784                                         break;
 1785                                 if (uio)
 1786                                         uiomove(uup + off, tocopy, uio);
 1787                                 else
 1788                                         memcpy(data, uup + off, tocopy);
 1789                         }
 1790 
 1791                         left -= tocopy;
 1792                         data = data + tocopy;
 1793                         off += tocopy - ntfs_cntob(NTFS_COMPUNIT_CL);
 1794                         cn += NTFS_COMPUNIT_CL;
 1795                 }
 1796 
 1797                 free(uup, M_NTFSDECOMP);
 1798                 free(cup, M_NTFSDECOMP);
 1799         } else
 1800                 error = ntfs_readattr_plain(ntmp, ip, attrnum, attrname,
 1801                                              roff, rsize, rdata, &init, uio);
 1802         ntfs_ntvattrrele(vap);
 1803         return (error);
 1804 }
 1805 
 1806 #if 0
 1807 int
 1808 ntfs_parserun(
 1809               cn_t * cn,
 1810               cn_t * cl,
 1811               u_int8_t * run,
 1812               u_long len,
 1813               u_long *off)
 1814 {
 1815         u_int8_t        sz;
 1816         int             i;
 1817 
 1818         if (NULL == run) {
 1819                 printf("ntfs_parsetun: run == NULL\n");
 1820                 return (EINVAL);
 1821         }
 1822         sz = run[(*off)++];
 1823         if (0 == sz) {
 1824                 printf("ntfs_parserun: trying to go out of run\n");
 1825                 return (E2BIG);
 1826         }
 1827         *cl = 0;
 1828         if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
 1829                 printf("ntfs_parserun: " \
 1830                        "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
 1831                        sz, len, *off);
 1832                 return (EINVAL);
 1833         }
 1834         for (i = 0; i < (sz & 0xF); i++)
 1835                 *cl += (u_int32_t) run[(*off)++] << (i << 3);
 1836 
 1837         sz >>= 4;
 1838         if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
 1839                 printf("ntfs_parserun: " \
 1840                        "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
 1841                        sz, len, *off);
 1842                 return (EINVAL);
 1843         }
 1844         for (i = 0; i < (sz & 0xF); i++)
 1845                 *cn += (u_int32_t) run[(*off)++] << (i << 3);
 1846 
 1847         return (0);
 1848 }
 1849 #endif
 1850 
 1851 /*
 1852  * Process fixup routine on given buffer.
 1853  */
 1854 int
 1855 ntfs_procfixups(
 1856                 struct ntfsmount * ntmp,
 1857                 u_int32_t magic,
 1858                 caddr_t buf,
 1859                 size_t len)
 1860 {
 1861         struct fixuphdr *fhp = (struct fixuphdr *) buf;
 1862         int             i;
 1863         u_int16_t       fixup;
 1864         u_int16_t      *fxp;
 1865         u_int16_t      *cfxp;
 1866 
 1867         if (fhp->fh_magic != magic) {
 1868                 printf("ntfs_procfixups: magic doesn't match: %08x != %08x\n",
 1869                        fhp->fh_magic, magic);
 1870                 return (EINVAL);
 1871         }
 1872         if ((fhp->fh_fnum - 1) * ntmp->ntm_bps != len) {
 1873                 printf("ntfs_procfixups: " \
 1874                        "bad fixups number: %d for %ld bytes block\n", 
 1875                        fhp->fh_fnum, (long)len);        /* XXX printf kludge */
 1876                 return (EINVAL);
 1877         }
 1878         if (fhp->fh_foff >= ntmp->ntm_spc * ntmp->ntm_mftrecsz * ntmp->ntm_bps) {
 1879                 printf("ntfs_procfixups: invalid offset: %x", fhp->fh_foff);
 1880                 return (EINVAL);
 1881         }
 1882         fxp = (u_int16_t *) (buf + fhp->fh_foff);
 1883         cfxp = (u_int16_t *) (buf + ntmp->ntm_bps - 2);
 1884         fixup = *fxp++;
 1885         for (i = 1; i < fhp->fh_fnum; i++, fxp++) {
 1886                 if (*cfxp != fixup) {
 1887                         printf("ntfs_procfixups: fixup %d doesn't match\n", i);
 1888                         return (EINVAL);
 1889                 }
 1890                 *cfxp = *fxp;
 1891                 cfxp = (u_int16_t *) ((caddr_t) cfxp + ntmp->ntm_bps);
 1892         }
 1893         return (0);
 1894 }
 1895 
 1896 #if 0
 1897 int
 1898 ntfs_runtocn(
 1899              cn_t * cn, 
 1900              struct ntfsmount * ntmp,
 1901              u_int8_t * run,
 1902              u_long len,
 1903              cn_t vcn)
 1904 {
 1905         cn_t            ccn = 0;
 1906         cn_t            ccl = 0;
 1907         u_long          off = 0;
 1908         int             error = 0;
 1909 
 1910 #if NTFS_DEBUG
 1911         int             i;
 1912         printf("ntfs_runtocn: run: %p, %ld bytes, vcn:%ld\n",
 1913                 run, len, (u_long) vcn);
 1914         printf("ntfs_runtocn: run: ");
 1915         for (i = 0; i < len; i++)
 1916                 printf("0x%02x ", run[i]);
 1917         printf("\n");
 1918 #endif
 1919 
 1920         if (NULL == run) {
 1921                 printf("ntfs_runtocn: run == NULL\n");
 1922                 return (EINVAL);
 1923         }
 1924         do {
 1925                 if (run[off] == 0) {
 1926                         printf("ntfs_runtocn: vcn too big\n");
 1927                         return (E2BIG);
 1928                 }
 1929                 vcn -= ccl;
 1930                 error = ntfs_parserun(&ccn, &ccl, run, len, &off);
 1931                 if (error) {
 1932                         printf("ntfs_runtocn: ntfs_parserun failed\n");
 1933                         return (error);
 1934                 }
 1935         } while (ccl <= vcn);
 1936         *cn = ccn + vcn;
 1937         return (0);
 1938 }
 1939 #endif
 1940 
 1941 /*
 1942  * this initializes toupper table & dependant variables to be ready for
 1943  * later work
 1944  */
 1945 void
 1946 ntfs_toupper_init()
 1947 {
 1948         ntfs_toupper_tab = (wchar *) NULL;
 1949         lockinit(&ntfs_toupper_lock, PVFS, "ntfs_toupper", 0, 0);
 1950         ntfs_toupper_usecount = 0;
 1951 }
 1952 
 1953 void
 1954 ntfs_toupper_destroy(void)
 1955 {
 1956 
 1957         lockdestroy(&ntfs_toupper_lock);
 1958 }
 1959 
 1960 /*
 1961  * if the ntfs_toupper_tab[] is filled already, just raise use count;
 1962  * otherwise read the data from the filesystem we are currently mounting
 1963  */
 1964 int
 1965 ntfs_toupper_use(mp, ntmp)
 1966         struct mount *mp;
 1967         struct ntfsmount *ntmp;
 1968 {
 1969         int error = 0;
 1970         struct vnode *vp;
 1971 
 1972         /* get exclusive access */
 1973         lockmgr(&ntfs_toupper_lock, LK_EXCLUSIVE, NULL);
 1974         
 1975         /* only read the translation data from a file if it hasn't been
 1976          * read already */
 1977         if (ntfs_toupper_tab)
 1978                 goto out;
 1979 
 1980         /*
 1981          * Read in Unicode lowercase -> uppercase translation file.
 1982          * XXX for now, just the first 256 entries are used anyway,
 1983          * so don't bother reading more
 1984          */
 1985         ntfs_toupper_tab = malloc(65536 * sizeof(wchar),
 1986                 M_NTFSRDATA, M_WAITOK);
 1987 
 1988         if ((error = VFS_VGET(mp, NTFS_UPCASEINO, LK_EXCLUSIVE, &vp)))
 1989                 goto out;
 1990         error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
 1991                         0, 65536*sizeof(wchar), (char *) ntfs_toupper_tab, NULL);
 1992         vput(vp);
 1993 
 1994     out:
 1995         ntfs_toupper_usecount++;
 1996         lockmgr(&ntfs_toupper_lock, LK_RELEASE, NULL);
 1997         return (error);
 1998 }
 1999 
 2000 /*
 2001  * lower the use count and if it reaches zero, free the memory
 2002  * tied by toupper table
 2003  */
 2004 void
 2005 ntfs_toupper_unuse()
 2006 {
 2007         /* get exclusive access */
 2008         lockmgr(&ntfs_toupper_lock, LK_EXCLUSIVE, NULL);
 2009 
 2010         ntfs_toupper_usecount--;
 2011         if (ntfs_toupper_usecount == 0) {
 2012                 free(ntfs_toupper_tab, M_NTFSRDATA);
 2013                 ntfs_toupper_tab = NULL;
 2014         }
 2015 #ifdef DIAGNOSTIC
 2016         else if (ntfs_toupper_usecount < 0) {
 2017                 panic("ntfs_toupper_unuse(): use count negative: %d\n",
 2018                         ntfs_toupper_usecount);
 2019         }
 2020 #endif
 2021         
 2022         /* release the lock */
 2023         lockmgr(&ntfs_toupper_lock, LK_RELEASE, NULL);
 2024 } 
 2025 
 2026 int
 2027 ntfs_u28_init(
 2028         struct ntfsmount *ntmp,
 2029         wchar *u2w,
 2030         char *cs_local,
 2031         char *cs_ntfs)
 2032 {
 2033         char ** u28;
 2034         int i, j, h, l;
 2035 
 2036         if (ntfs_iconv && cs_local) {
 2037                 ntfs_iconv->open(cs_local, cs_ntfs, &ntmp->ntm_ic_u2l);
 2038                 return (0);
 2039         }
 2040 
 2041         u28 = malloc(256 * sizeof(char*), M_TEMP, M_WAITOK | M_ZERO);
 2042 
 2043         for (i=0; i<256; i++) {
 2044                 h = (u2w[i] >> 8) & 0xFF;
 2045                 l = (u2w[i]) &0xFF;
 2046 
 2047                 if (u28[h] == NULL) {
 2048                         u28[h] = malloc(256 * sizeof(char), M_TEMP, M_WAITOK);
 2049                         for (j=0; j<256; j++)
 2050                                 u28[h][j] = '_';
 2051                 }
 2052 
 2053                 u28[h][l] = i & 0xFF;
 2054         }
 2055 
 2056         ntmp->ntm_u28 = u28;
 2057 
 2058         return (0);
 2059 }
 2060 
 2061 int
 2062 ntfs_u28_uninit(struct ntfsmount *ntmp)
 2063 {
 2064         char ** u28;
 2065         int i;
 2066 
 2067         if (ntmp->ntm_u28 == NULL) {
 2068                 if (ntfs_iconv && ntmp->ntm_ic_u2l) {
 2069                         ntfs_iconv->close(ntmp->ntm_ic_u2l);
 2070                 }
 2071                 return (0);
 2072         }
 2073 
 2074         u28 = ntmp->ntm_u28;
 2075 
 2076         for (i=0; i<256; i++)
 2077                 if (u28[i] != NULL)
 2078                         free(u28[i], M_TEMP);
 2079 
 2080         free(u28, M_TEMP);
 2081 
 2082         return (0);
 2083 }
 2084 
 2085 int
 2086 ntfs_82u_init(
 2087         struct ntfsmount *ntmp,
 2088         char *cs_local,
 2089         char *cs_ntfs)
 2090 {
 2091         wchar * _82u;
 2092         int i;
 2093 
 2094         if (ntfs_iconv && cs_local) {
 2095                 ntfs_iconv->open(cs_ntfs, cs_local, &ntmp->ntm_ic_l2u);
 2096                 return (0);
 2097         }
 2098 
 2099         _82u = malloc(256 * sizeof(wchar), M_TEMP, M_WAITOK);
 2100 
 2101         for (i=0; i<256; i++)
 2102                         _82u[i] = i;
 2103 
 2104         ntmp->ntm_82u = _82u;
 2105 
 2106         return (0);
 2107 }
 2108 
 2109 int
 2110 ntfs_82u_uninit(struct ntfsmount *ntmp)
 2111 {
 2112 
 2113         if (ntmp->ntm_82u == NULL) {
 2114                 if (ntfs_iconv && ntmp->ntm_ic_l2u) {
 2115                         ntfs_iconv->close(ntmp->ntm_ic_l2u);
 2116                 }
 2117                 return (0);
 2118         }
 2119 
 2120         free(ntmp->ntm_82u, M_TEMP);
 2121         return (0);
 2122 }
 2123 
 2124 /*
 2125  * maps the Unicode char to local character
 2126  */
 2127 char *
 2128 ntfs_u28(
 2129         char *outbuf,
 2130         struct ntfsmount *ntmp, 
 2131         wchar wc)
 2132 {
 2133         char *p, *outp, inbuf[3];
 2134         size_t ilen, olen;
 2135 
 2136         outp = outbuf;
 2137         if (ntfs_iconv && ntmp->ntm_ic_u2l) {
 2138                 ilen = 2;
 2139                 olen = 4;
 2140 
 2141                 inbuf[0] = (char)(wc>>8);
 2142                 inbuf[1] = (char)wc;
 2143                 inbuf[2] = '\0';
 2144                 p = inbuf;
 2145                 ntfs_iconv->convchr(ntmp->ntm_ic_u2l, (const char **)&p, &ilen,
 2146                                     &outp, &olen);
 2147                 if (olen == 4)
 2148                         *outp++ = '?';
 2149                 *outp = '\0';
 2150                 outp = outbuf;
 2151                 return (outp);
 2152         }
 2153 
 2154         p = ntmp->ntm_u28[(wc>>8)&0xFF];
 2155         outbuf[0] = (p == NULL) ? '_' : p[wc&0xFF] & 0xFF;
 2156         outbuf[1] = '\0';
 2157         return (outp);
 2158 }
 2159 
 2160 wchar
 2161 ntfs_82u(
 2162         struct ntfsmount *ntmp, 
 2163         const char *c,
 2164         int *len)
 2165 {
 2166         char *outp, outbuf[3];
 2167         wchar uc;
 2168         size_t ilen, olen;
 2169 
 2170         if (ntfs_iconv && ntmp->ntm_ic_l2u) {
 2171                 ilen = (size_t)*len;
 2172                 olen = 2;
 2173 
 2174                 outp = outbuf;
 2175                 ntfs_iconv->convchr(ntmp->ntm_ic_l2u, &c, &ilen, &outp, &olen);
 2176                 *len -= (int)ilen;
 2177                 uc = (wchar)((outbuf[0]<<8) | (outbuf[1]&0xFF));
 2178 
 2179                 return (uc);
 2180         }
 2181 
 2182         if (ntmp->ntm_82u != NULL)
 2183                 return (ntmp->ntm_82u[*c&0xFF]);
 2184 
 2185         return ('?');
 2186 }
 2187 

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