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/9.0/sys/fs/ntfs/ntfs_subr.c 200214 2009-12-07 15:15:08Z guido $
   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                 bn *= ntmp->ntm_multiplier;
  282 
  283                 error = bread(ntmp->ntm_devvp,
  284                               bn, ntfs_bntob(ntmp->ntm_bpmftrec),
  285                               NOCRED, &bp);
  286                 if (error) {
  287                         printf("ntfs_loadntnode: BREAD FAILED\n");
  288                         brelse(bp);
  289                         goto out;
  290                 }
  291                 memcpy(mfrp, bp->b_data, ntfs_bntob(ntmp->ntm_bpmftrec));
  292                 bqrelse(bp);
  293         } else {
  294                 struct vnode   *vp;
  295 
  296                 vp = ntmp->ntm_sysvn[NTFS_MFTINO];
  297                 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
  298                                ip->i_number * ntfs_bntob(ntmp->ntm_bpmftrec),
  299                                ntfs_bntob(ntmp->ntm_bpmftrec), mfrp, NULL);
  300                 if (error) {
  301                         printf("ntfs_loadntnode: ntfs_readattr failed\n");
  302                         goto out;
  303                 }
  304         }
  305 
  306         /* Check if magic and fixups are correct */
  307         error = ntfs_procfixups(ntmp, NTFS_FILEMAGIC, (caddr_t)mfrp,
  308                                 ntfs_bntob(ntmp->ntm_bpmftrec));
  309         if (error) {
  310                 printf("ntfs_loadntnode: BAD MFT RECORD %d\n",
  311                        (u_int32_t) ip->i_number);
  312                 goto out;
  313         }
  314 
  315         dprintf(("ntfs_loadntnode: load attrs for ino: %d\n",ip->i_number));
  316         off = mfrp->fr_attroff;
  317         ap = (struct attr *) ((caddr_t)mfrp + off);
  318 
  319         LIST_INIT(&ip->i_valist);
  320         
  321         while (ap->a_hdr.a_type != -1) {
  322                 error = ntfs_attrtontvattr(ntmp, &nvap, ap);
  323                 if (error)
  324                         break;
  325                 nvap->va_ip = ip;
  326 
  327                 LIST_INSERT_HEAD(&ip->i_valist, nvap, va_list);
  328 
  329                 off += ap->a_hdr.reclen;
  330                 ap = (struct attr *) ((caddr_t)mfrp + off);
  331         }
  332         if (error) {
  333                 printf("ntfs_loadntnode: failed to load attr ino: %d\n",
  334                        ip->i_number);
  335                 goto out;
  336         }
  337 
  338         ip->i_mainrec = mfrp->fr_mainrec;
  339         ip->i_nlink = mfrp->fr_nlink;
  340         ip->i_frflag = mfrp->fr_flags;
  341 
  342         ip->i_flag |= IN_LOADED;
  343 
  344 out:
  345         free(mfrp, M_TEMP);
  346         return (error);
  347 }
  348                 
  349 /*
  350  * Routine locks ntnode and increase usecount, just opposite of
  351  * ntfs_ntput().
  352  */
  353 int
  354 ntfs_ntget(ip)
  355         struct ntnode *ip;
  356 {
  357         dprintf(("ntfs_ntget: get ntnode %d: %p, usecount: %d\n",
  358                 ip->i_number, ip, ip->i_usecount));
  359 
  360         mtx_lock(&ip->i_interlock);
  361         ip->i_usecount++;
  362         lockmgr(&ip->i_lock, LK_EXCLUSIVE | LK_INTERLOCK, &ip->i_interlock);
  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 
  395         ip = malloc(sizeof(struct ntnode), M_NTFSNTNODE,
  396                 M_WAITOK | M_ZERO);
  397         ddprintf(("ntfs_ntlookup: allocating ntnode: %d: %p\n", ino, ip));
  398 
  399         /* Generic initialization */
  400         ip->i_devvp = ntmp->ntm_devvp;
  401         ip->i_dev = ntmp->ntm_devvp->v_rdev;
  402         ip->i_number = ino;
  403         ip->i_mp = ntmp;
  404 
  405         LIST_INIT(&ip->i_fnlist);
  406         VREF(ip->i_devvp);
  407 
  408         /* init lock and lock the newborn ntnode */
  409         lockinit(&ip->i_lock, PINOD, "ntnode", 0, 0);
  410         mtx_init(&ip->i_interlock, "ntnode interlock", NULL, MTX_DEF);
  411         ntfs_ntget(ip);
  412 
  413         ntfs_nthashins(ip);
  414 
  415         lockmgr(&ntfs_hashlock, LK_RELEASE, NULL);
  416 
  417         *ipp = ip;
  418 
  419         dprintf(("ntfs_ntlookup: ntnode %d: %p, usecount: %d\n",
  420                 ino, ip, ip->i_usecount));
  421 
  422         return (0);
  423 }
  424 
  425 /*
  426  * Decrement usecount of ntnode and unlock it, if usecount reach zero,
  427  * deallocate ntnode.
  428  *
  429  * ntnode should be locked on entry, and unlocked on return.
  430  */
  431 void
  432 ntfs_ntput(ip)
  433         struct ntnode *ip;
  434 {
  435         struct ntvattr *vap;
  436 
  437         dprintf(("ntfs_ntput: rele ntnode %d: %p, usecount: %d\n",
  438                 ip->i_number, ip, ip->i_usecount));
  439 
  440         mtx_lock(&ip->i_interlock);
  441         ip->i_usecount--;
  442 
  443 #ifdef DIAGNOSTIC
  444         if (ip->i_usecount < 0) {
  445                 panic("ntfs_ntput: ino: %d usecount: %d \n",
  446                       ip->i_number,ip->i_usecount);
  447         }
  448 #endif
  449 
  450         if (ip->i_usecount > 0) {
  451                 lockmgr(&ip->i_lock, LK_RELEASE|LK_INTERLOCK, &ip->i_interlock);
  452                 return;
  453         }
  454 
  455         dprintf(("ntfs_ntput: deallocating ntnode: %d\n", ip->i_number));
  456 
  457         if (LIST_FIRST(&ip->i_fnlist))
  458                 panic("ntfs_ntput: ntnode has fnodes\n");
  459 
  460         ntfs_nthashrem(ip);
  461 
  462         while ((vap = LIST_FIRST(&ip->i_valist)) != NULL) {
  463                 LIST_REMOVE(vap,va_list);
  464                 ntfs_freentvattr(vap);
  465         }
  466         lockmgr(&ip->i_lock, LK_RELEASE | LK_INTERLOCK, &ip->i_interlock);
  467         mtx_destroy(&ip->i_interlock);
  468         lockdestroy(&ip->i_lock);
  469         vrele(ip->i_devvp);
  470         free(ip, M_NTFSNTNODE);
  471 }
  472 
  473 /*
  474  * increment usecount of ntnode 
  475  */
  476 void
  477 ntfs_ntref(ip)
  478         struct ntnode *ip;
  479 {
  480         mtx_lock(&ip->i_interlock);
  481         ip->i_usecount++;
  482         mtx_unlock(&ip->i_interlock);
  483 
  484         dprintf(("ntfs_ntref: ino %d, usecount: %d\n",
  485                 ip->i_number, ip->i_usecount));
  486                         
  487 }
  488 
  489 /*
  490  * Decrement usecount of ntnode.
  491  */
  492 void
  493 ntfs_ntrele(ip)
  494         struct ntnode *ip;
  495 {
  496         dprintf(("ntfs_ntrele: rele ntnode %d: %p, usecount: %d\n",
  497                 ip->i_number, ip, ip->i_usecount));
  498 
  499         mtx_lock(&ip->i_interlock);
  500         ip->i_usecount--;
  501 
  502         if (ip->i_usecount < 0)
  503                 panic("ntfs_ntrele: ino: %d usecount: %d \n",
  504                       ip->i_number,ip->i_usecount);
  505         mtx_unlock(&ip->i_interlock);
  506 }
  507 
  508 /*
  509  * Deallocate all memory allocated for ntvattr
  510  */
  511 void
  512 ntfs_freentvattr(vap)
  513         struct ntvattr * vap;
  514 {
  515         if (vap->va_flag & NTFS_AF_INRUN) {
  516                 if (vap->va_vruncn)
  517                         free(vap->va_vruncn, M_NTFSRUN);
  518                 if (vap->va_vruncl)
  519                         free(vap->va_vruncl, M_NTFSRUN);
  520         } else {
  521                 if (vap->va_datap)
  522                         free(vap->va_datap, M_NTFSRDATA);
  523         }
  524         free(vap, M_NTFSNTVATTR);
  525 }
  526 
  527 /*
  528  * Convert disk image of attribute into ntvattr structure,
  529  * runs are expanded also.
  530  */
  531 int
  532 ntfs_attrtontvattr(
  533                    struct ntfsmount * ntmp,
  534                    struct ntvattr ** rvapp,
  535                    struct attr * rap)
  536 {
  537         int             error, i;
  538         struct ntvattr *vap;
  539 
  540         error = 0;
  541         *rvapp = NULL;
  542 
  543         vap = malloc(sizeof(struct ntvattr),
  544                 M_NTFSNTVATTR, M_WAITOK | M_ZERO);
  545         vap->va_ip = NULL;
  546         vap->va_flag = rap->a_hdr.a_flag;
  547         vap->va_type = rap->a_hdr.a_type;
  548         vap->va_compression = rap->a_hdr.a_compression;
  549         vap->va_index = rap->a_hdr.a_index;
  550 
  551         ddprintf(("type: 0x%x, index: %d", vap->va_type, vap->va_index));
  552 
  553         vap->va_namelen = rap->a_hdr.a_namelen;
  554         if (rap->a_hdr.a_namelen) {
  555                 wchar *unp = (wchar *) ((caddr_t) rap + rap->a_hdr.a_nameoff);
  556                 ddprintf((", name:["));
  557                 for (i = 0; i < vap->va_namelen; i++) {
  558                         vap->va_name[i] = unp[i];
  559                         ddprintf(("%c", vap->va_name[i]));
  560                 }
  561                 ddprintf(("]"));
  562         }
  563         if (vap->va_flag & NTFS_AF_INRUN) {
  564                 ddprintf((", nonres."));
  565                 vap->va_datalen = rap->a_nr.a_datalen;
  566                 vap->va_allocated = rap->a_nr.a_allocated;
  567                 vap->va_vcnstart = rap->a_nr.a_vcnstart;
  568                 vap->va_vcnend = rap->a_nr.a_vcnend;
  569                 vap->va_compressalg = rap->a_nr.a_compressalg;
  570                 error = ntfs_runtovrun(&(vap->va_vruncn), &(vap->va_vruncl),
  571                                        &(vap->va_vruncnt),
  572                                        (caddr_t) rap + rap->a_nr.a_dataoff);
  573         } else {
  574                 vap->va_compressalg = 0;
  575                 ddprintf((", res."));
  576                 vap->va_datalen = rap->a_r.a_datalen;
  577                 vap->va_allocated = rap->a_r.a_datalen;
  578                 vap->va_vcnstart = 0;
  579                 vap->va_vcnend = ntfs_btocn(vap->va_allocated);
  580                 vap->va_datap = malloc(vap->va_datalen,
  581                        M_NTFSRDATA, M_WAITOK);
  582                 memcpy(vap->va_datap, (caddr_t) rap + rap->a_r.a_dataoff,
  583                        rap->a_r.a_datalen);
  584         }
  585         ddprintf((", len: %lld", vap->va_datalen));
  586 
  587         if (error)
  588                 free(vap, M_NTFSNTVATTR);
  589         else
  590                 *rvapp = vap;
  591 
  592         ddprintf(("\n"));
  593 
  594         return (error);
  595 }
  596 
  597 /*
  598  * Expand run into more utilizable and more memory eating format.
  599  */
  600 int
  601 ntfs_runtovrun(
  602                cn_t ** rcnp,
  603                cn_t ** rclp,
  604                u_long * rcntp,
  605                u_int8_t * run)
  606 {
  607         u_int32_t       off;
  608         u_int32_t       sz, i;
  609         cn_t           *cn;
  610         cn_t           *cl;
  611         u_long          cnt;
  612         cn_t            prev;
  613         cn_t            tmp;
  614 
  615         off = 0;
  616         cnt = 0;
  617         i = 0;
  618         while (run[off]) {
  619                 off += (run[off] & 0xF) + ((run[off] >> 4) & 0xF) + 1;
  620                 cnt++;
  621         }
  622         cn = malloc(cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
  623         cl = malloc(cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
  624 
  625         off = 0;
  626         cnt = 0;
  627         prev = 0;
  628         while (run[off]) {
  629 
  630                 sz = run[off++];
  631                 cl[cnt] = 0;
  632 
  633                 for (i = 0; i < (sz & 0xF); i++)
  634                         cl[cnt] += (u_int32_t) run[off++] << (i << 3);
  635 
  636                 sz >>= 4;
  637                 if (run[off + sz - 1] & 0x80) {
  638                         tmp = ((u_int64_t) - 1) << (sz << 3);
  639                         for (i = 0; i < sz; i++)
  640                                 tmp |= (u_int64_t) run[off++] << (i << 3);
  641                 } else {
  642                         tmp = 0;
  643                         for (i = 0; i < sz; i++)
  644                                 tmp |= (u_int64_t) run[off++] << (i << 3);
  645                 }
  646                 if (tmp)
  647                         prev = cn[cnt] = prev + tmp;
  648                 else
  649                         cn[cnt] = tmp;
  650 
  651                 cnt++;
  652         }
  653         *rcnp = cn;
  654         *rclp = cl;
  655         *rcntp = cnt;
  656         return (0);
  657 }
  658 
  659 /*
  660  * Compare unicode and ascii string case insens.
  661  */
  662 static int
  663 ntfs_uastricmp(ntmp, ustr, ustrlen, astr, astrlen)
  664         struct ntfsmount *ntmp;
  665         const wchar *ustr;
  666         size_t ustrlen;
  667         const char *astr;
  668         size_t astrlen;
  669 {
  670         int len;
  671         size_t i, j, mbstrlen = astrlen;
  672         int res;
  673         wchar wc;
  674 
  675         if (ntmp->ntm_ic_l2u) {
  676                 for (i = 0, j = 0; i < ustrlen && j < astrlen; i++, j++) {
  677                         if (j < astrlen -1) {
  678                                 wc = (wchar)astr[j]<<8 | (astr[j+1]&0xFF);
  679                                 len = 2;
  680                         } else {
  681                                 wc = (wchar)astr[j]<<8 & 0xFF00;
  682                                 len = 1;
  683                         }
  684                         res = ((int) NTFS_TOUPPER(ustr[i])) -
  685                                 ((int)NTFS_TOUPPER(NTFS_82U(wc, &len)));
  686                         j += len - 1;
  687                         mbstrlen -= len - 1;
  688 
  689                         if (res)
  690                                 return res;
  691                 }
  692         } else {
  693                 /*
  694                  * We use NTFS_82U(NTFS_U28(c)) to get rid of unicode
  695                  * symbols not covered by translation table
  696                  */
  697                 for (i = 0; i < ustrlen && i < astrlen; i++) {
  698                         res = ((int) NTFS_TOUPPER(NTFS_82U(NTFS_U28(ustr[i]), &len))) -
  699                                 ((int)NTFS_TOUPPER(NTFS_82U((wchar)astr[i], &len)));
  700                         if (res)
  701                                 return res;
  702                 }
  703         }
  704         return (ustrlen - mbstrlen);
  705 }
  706 
  707 /*
  708  * Compare unicode and ascii string case sens.
  709  */
  710 static int
  711 ntfs_uastrcmp(ntmp, ustr, ustrlen, astr, astrlen)
  712         struct ntfsmount *ntmp;
  713         const wchar *ustr;
  714         size_t ustrlen;
  715         const char *astr;
  716         size_t astrlen;
  717 {
  718         char u, l;
  719         size_t i, j, mbstrlen = astrlen;
  720         int res;
  721         wchar wc;
  722 
  723         for (i = 0, j = 0; (i < ustrlen) && (j < astrlen); i++, j++) {
  724                 res = 0;
  725                 wc = NTFS_U28(ustr[i]);
  726                 u = (char)(wc>>8);
  727                 l = (char)wc;
  728                 if (u != '\0' && j < astrlen -1) {
  729                         res = (int) (u - astr[j++]);
  730                         mbstrlen--;
  731                 }
  732                 res = (res<<8) + (int) (l - astr[j]);
  733                 if (res)
  734                         return res;
  735         }
  736         return (ustrlen - mbstrlen);
  737 }
  738 
  739 /* 
  740  * Search fnode in ntnode, if not found allocate and preinitialize.
  741  *
  742  * ntnode should be locked on entry.
  743  */
  744 int
  745 ntfs_fget(
  746         struct ntfsmount *ntmp,
  747         struct ntnode *ip,
  748         int attrtype,
  749         char *attrname,
  750         struct fnode **fpp)
  751 {
  752         struct fnode *fp;
  753 
  754         dprintf(("ntfs_fget: ino: %d, attrtype: 0x%x, attrname: %s\n",
  755                 ip->i_number,attrtype, attrname?attrname:""));
  756         *fpp = NULL;
  757         LIST_FOREACH(fp, &ip->i_fnlist, f_fnlist){
  758                 dprintf(("ntfs_fget: fnode: attrtype: %d, attrname: %s\n",
  759                         fp->f_attrtype, fp->f_attrname?fp->f_attrname:""));
  760 
  761                 if ((attrtype == fp->f_attrtype) && 
  762                     ((!attrname && !fp->f_attrname) ||
  763                      (attrname && fp->f_attrname &&
  764                       !strcmp(attrname,fp->f_attrname)))){
  765                         dprintf(("ntfs_fget: found existed: %p\n",fp));
  766                         *fpp = fp;
  767                 }
  768         }
  769 
  770         if (*fpp)
  771                 return (0);
  772 
  773         fp = malloc(sizeof(struct fnode), M_NTFSFNODE,
  774                 M_WAITOK | M_ZERO);
  775         dprintf(("ntfs_fget: allocating fnode: %p\n",fp));
  776 
  777         fp->f_ip = ip;
  778         if (attrname) {
  779                 fp->f_flag |= FN_AATTRNAME;
  780                 fp->f_attrname = malloc(strlen(attrname)+1, M_TEMP, M_WAITOK);
  781                 strcpy(fp->f_attrname, attrname);
  782         } else
  783                 fp->f_attrname = NULL;
  784         fp->f_attrtype = attrtype;
  785 
  786         ntfs_ntref(ip);
  787 
  788         LIST_INSERT_HEAD(&ip->i_fnlist, fp, f_fnlist);
  789 
  790         *fpp = fp;
  791 
  792         return (0);
  793 }
  794 
  795 /*
  796  * Deallocate fnode, remove it from ntnode's fnode list.
  797  *
  798  * ntnode should be locked.
  799  */
  800 void
  801 ntfs_frele(
  802         struct fnode *fp)
  803 {
  804         struct ntnode *ip = FTONT(fp);
  805 
  806         dprintf(("ntfs_frele: fnode: %p for %d: %p\n", fp, ip->i_number, ip));
  807 
  808         dprintf(("ntfs_frele: deallocating fnode\n"));
  809         LIST_REMOVE(fp,f_fnlist);
  810         if (fp->f_flag & FN_AATTRNAME)
  811                 free(fp->f_attrname, M_TEMP);
  812         if (fp->f_dirblbuf)
  813                 free(fp->f_dirblbuf, M_NTFSDIR);
  814         free(fp, M_NTFSFNODE);
  815         ntfs_ntrele(ip);
  816 }
  817 
  818 /*
  819  * Lookup attribute name in format: [[:$ATTR_TYPE]:$ATTR_NAME], 
  820  * $ATTR_TYPE is searched in attrdefs read from $AttrDefs.
  821  * If $ATTR_TYPE nott specifed, ATTR_A_DATA assumed.
  822  */
  823 static int
  824 ntfs_ntlookupattr(
  825                 struct ntfsmount * ntmp,
  826                 const char * name,
  827                 int namelen,
  828                 int *attrtype,
  829                 char **attrname)
  830 {
  831         const char *sys;
  832         size_t syslen, i;
  833         struct ntvattrdef *adp;
  834 
  835         if (namelen == 0)
  836                 return (0);
  837 
  838         if (name[0] == '$') {
  839                 sys = name;
  840                 for (syslen = 0; syslen < namelen; syslen++) {
  841                         if(sys[syslen] == ':') {
  842                                 name++;
  843                                 namelen--;
  844                                 break;
  845                         }
  846                 }
  847                 name += syslen;
  848                 namelen -= syslen;
  849 
  850                 adp = ntmp->ntm_ad;
  851                 for (i = 0; i < ntmp->ntm_adnum; i++, adp++){
  852                         if (syslen != adp->ad_namelen || 
  853                            strncmp(sys, adp->ad_name, syslen) != 0)
  854                                 continue;
  855 
  856                         *attrtype = adp->ad_type;
  857                         goto out;
  858                 }
  859                 return (ENOENT);
  860         } else
  861                 *attrtype = NTFS_A_DATA;
  862 
  863     out:
  864         if (namelen) {
  865                 (*attrname) = malloc(namelen, M_TEMP, M_WAITOK);
  866                 memcpy((*attrname), name, namelen);
  867                 (*attrname)[namelen] = '\0';
  868         }
  869 
  870         return (0);
  871 }
  872 
  873 /*
  874  * Lookup specifed node for filename, matching cnp,
  875  * return fnode filled.
  876  */
  877 int
  878 ntfs_ntlookupfile(
  879               struct ntfsmount * ntmp,
  880               struct vnode * vp,
  881               struct componentname * cnp,
  882               struct vnode ** vpp)
  883 {
  884         struct fnode   *fp = VTOF(vp);
  885         struct ntnode  *ip = FTONT(fp);
  886         struct ntvattr *vap;    /* Root attribute */
  887         cn_t            cn;     /* VCN in current attribute */
  888         caddr_t         rdbuf;  /* Buffer to read directory's blocks  */
  889         u_int32_t       blsize;
  890         u_int64_t       rdsize; /* Length of data to read from current block */
  891         struct attr_indexentry *iep;
  892         int             error, res, anamelen, fnamelen;
  893         const char     *fname,*aname;
  894         u_int32_t       aoff;
  895         int attrtype = NTFS_A_DATA;
  896         char *attrname = NULL;
  897         struct fnode   *nfp;
  898         struct vnode   *nvp;
  899         enum vtype      f_type;
  900 
  901         error = ntfs_ntget(ip);
  902         if (error)
  903                 return (error);
  904 
  905         error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
  906         if (error || (vap->va_flag & NTFS_AF_INRUN))
  907                 return (ENOTDIR);
  908 
  909         blsize = vap->va_a_iroot->ir_size;
  910         rdsize = vap->va_datalen;
  911 
  912         /*
  913          * Divide file name into: foofilefoofilefoofile[:attrspec]
  914          * Store like this:       fname:fnamelen       [aname:anamelen]
  915          */
  916         fname = cnp->cn_nameptr;
  917         aname = NULL;
  918         anamelen = 0;
  919         for (fnamelen = 0; fnamelen < cnp->cn_namelen; fnamelen++)
  920                 if(fname[fnamelen] == ':') {
  921                         aname = fname + fnamelen + 1;
  922                         anamelen = cnp->cn_namelen - fnamelen - 1;
  923                         dprintf(("ntfs_ntlookupfile: %s (%d), attr: %s (%d)\n",
  924                                 fname, fnamelen, aname, anamelen));
  925                         break;
  926                 }
  927 
  928         dprintf(("ntfs_ntlookupfile: blksz: %d, rdsz: %jd\n", blsize, rdsize));
  929 
  930         rdbuf = malloc(blsize, M_TEMP, M_WAITOK);
  931 
  932         error = ntfs_readattr(ntmp, ip, NTFS_A_INDXROOT, "$I30",
  933                                0, rdsize, rdbuf, NULL);
  934         if (error)
  935                 goto fail;
  936 
  937         aoff = sizeof(struct attr_indexroot);
  938 
  939         do {
  940                 iep = (struct attr_indexentry *) (rdbuf + aoff);
  941 
  942                 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
  943                         aoff += iep->reclen,
  944                         iep = (struct attr_indexentry *) (rdbuf + aoff))
  945                 {
  946                         ddprintf(("scan: %d, %d\n",
  947                                   (u_int32_t) iep->ie_number,
  948                                   (u_int32_t) iep->ie_fnametype));
  949 
  950                         /* check the name - the case-insensitible check
  951                          * has to come first, to break from this for loop
  952                          * if needed, so we can dive correctly */
  953                         res = NTFS_UASTRICMP(iep->ie_fname, iep->ie_fnamelen,
  954                                 fname, fnamelen);
  955                         if (res > 0) break;
  956                         if (res < 0) continue;
  957 
  958                         if (iep->ie_fnametype == 0 ||
  959                             !(ntmp->ntm_flag & NTFS_MFLAG_CASEINS))
  960                         {
  961                                 res = NTFS_UASTRCMP(iep->ie_fname,
  962                                         iep->ie_fnamelen, fname, fnamelen);
  963                                 if (res != 0) continue;
  964                         }
  965 
  966                         if (aname) {
  967                                 error = ntfs_ntlookupattr(ntmp,
  968                                         aname, anamelen,
  969                                         &attrtype, &attrname);
  970                                 if (error)
  971                                         goto fail;
  972                         }
  973 
  974                         /* Check if we've found ourself */
  975                         if ((iep->ie_number == ip->i_number) &&
  976                             (attrtype == fp->f_attrtype) &&
  977                             ((!attrname && !fp->f_attrname) ||
  978                              (attrname && fp->f_attrname &&
  979                               !strcmp(attrname, fp->f_attrname))))
  980                         {
  981                                 VREF(vp);
  982                                 *vpp = vp;
  983                                 error = 0;
  984                                 goto fail;
  985                         }
  986 
  987                         /* vget node, but don't load it */
  988                         error = ntfs_vgetex(ntmp->ntm_mountp,
  989                                    iep->ie_number, attrtype, attrname,
  990                                    LK_EXCLUSIVE, VG_DONTLOADIN | VG_DONTVALIDFN,
  991                                    curthread, &nvp);
  992 
  993                         /* free the buffer returned by ntfs_ntlookupattr() */
  994                         if (attrname) {
  995                                 free(attrname, M_TEMP);
  996                                 attrname = NULL;
  997                         }
  998 
  999                         if (error)
 1000                                 goto fail;
 1001 
 1002                         nfp = VTOF(nvp);
 1003 
 1004                         if (nfp->f_flag & FN_VALID) {
 1005                                 *vpp = nvp;
 1006                                 goto fail;
 1007                         }
 1008 
 1009                         nfp->f_fflag = iep->ie_fflag;
 1010                         nfp->f_pnumber = iep->ie_fpnumber;
 1011                         nfp->f_times = iep->ie_ftimes;
 1012 
 1013                         if((nfp->f_fflag & NTFS_FFLAG_DIR) &&
 1014                            (nfp->f_attrtype == NTFS_A_DATA) &&
 1015                            (nfp->f_attrname == NULL))
 1016                                 f_type = VDIR;  
 1017                         else
 1018                                 f_type = VREG;  
 1019 
 1020                         nvp->v_type = f_type;
 1021 
 1022                         if ((nfp->f_attrtype == NTFS_A_DATA) &&
 1023                             (nfp->f_attrname == NULL))
 1024                         {
 1025                                 /* Opening default attribute */
 1026                                 nfp->f_size = iep->ie_fsize;
 1027                                 nfp->f_allocated = iep->ie_fallocated;
 1028                                 nfp->f_flag |= FN_PRELOADED;
 1029                         } else {
 1030                                 error = ntfs_filesize(ntmp, nfp,
 1031                                             &nfp->f_size, &nfp->f_allocated);
 1032                                 if (error) {
 1033                                         vput(nvp);
 1034                                         goto fail;
 1035                                 }
 1036                         }
 1037 
 1038                         nfp->f_flag &= ~FN_VALID;
 1039                         *vpp = nvp;
 1040                         goto fail;
 1041                 }
 1042 
 1043                 /* Dive if possible */
 1044                 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) {
 1045                         dprintf(("ntfs_ntlookupfile: diving\n"));
 1046 
 1047                         cn = *(cn_t *) (rdbuf + aoff +
 1048                                         iep->reclen - sizeof(cn_t));
 1049                         rdsize = blsize;
 1050 
 1051                         error = ntfs_readattr(ntmp, ip, NTFS_A_INDX, "$I30",
 1052                                         ntfs_cntob(cn), rdsize, rdbuf, NULL);
 1053                         if (error)
 1054                                 goto fail;
 1055 
 1056                         error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
 1057                                                 rdbuf, rdsize);
 1058                         if (error)
 1059                                 goto fail;
 1060 
 1061                         aoff = (((struct attr_indexalloc *) rdbuf)->ia_hdrsize +
 1062                                 0x18);
 1063                 } else {
 1064                         dprintf(("ntfs_ntlookupfile: nowhere to dive :-(\n"));
 1065                         error = ENOENT;
 1066                         break;
 1067                 }
 1068         } while (1);
 1069 
 1070         dprintf(("finish\n"));
 1071 
 1072 fail:
 1073         if (attrname) free(attrname, M_TEMP);
 1074         ntfs_ntvattrrele(vap);
 1075         ntfs_ntput(ip);
 1076         free(rdbuf, M_TEMP);
 1077         return (error);
 1078 }
 1079 
 1080 /*
 1081  * Check if name type is permitted to show.
 1082  */
 1083 int
 1084 ntfs_isnamepermitted(
 1085                      struct ntfsmount * ntmp,
 1086                      struct attr_indexentry * iep)
 1087 {
 1088         if (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)
 1089                 return 1;
 1090 
 1091         switch (iep->ie_fnametype) {
 1092         case 2:
 1093                 ddprintf(("ntfs_isnamepermitted: skipped DOS name\n"));
 1094                 return 0;
 1095         case 0: case 1: case 3:
 1096                 return 1;
 1097         default:
 1098                 printf("ntfs_isnamepermitted: " \
 1099                        "WARNING! Unknown file name type: %d\n",
 1100                        iep->ie_fnametype);
 1101                 break;
 1102         }
 1103         return 0;
 1104 }
 1105 
 1106 /*
 1107  * Read ntfs dir like stream of attr_indexentry, not like btree of them.
 1108  * This is done by scaning $BITMAP:$I30 for busy clusters and reading them.
 1109  * Ofcouse $INDEX_ROOT:$I30 is read before. Last read values are stored in
 1110  * fnode, so we can skip toward record number num almost immediatly.
 1111  * Anyway this is rather slow routine. The problem is that we don't know
 1112  * how many records are there in $INDEX_ALLOCATION:$I30 block.
 1113  */
 1114 int
 1115 ntfs_ntreaddir(
 1116                struct ntfsmount * ntmp,
 1117                struct fnode * fp,
 1118                u_int32_t num,
 1119                struct attr_indexentry ** riepp)
 1120 {
 1121         struct ntnode  *ip = FTONT(fp);
 1122         struct ntvattr *vap = NULL;     /* IndexRoot attribute */
 1123         struct ntvattr *bmvap = NULL;   /* BitMap attribute */
 1124         struct ntvattr *iavap = NULL;   /* IndexAllocation attribute */
 1125         caddr_t         rdbuf;          /* Buffer to read directory's blocks  */
 1126         u_int8_t       *bmp = NULL;     /* Bitmap */
 1127         u_int32_t       blsize;         /* Index allocation size (2048) */
 1128         u_int32_t       rdsize;         /* Length of data to read */
 1129         u_int32_t       attrnum;        /* Current attribute type */
 1130         u_int32_t       cpbl = 1;       /* Clusters per directory block */
 1131         u_int32_t       blnum;
 1132         struct attr_indexentry *iep;
 1133         int             error = ENOENT;
 1134         u_int32_t       aoff, cnum;
 1135 
 1136         dprintf(("ntfs_ntreaddir: read ino: %d, num: %d\n", ip->i_number, num));
 1137         error = ntfs_ntget(ip);
 1138         if (error)
 1139                 return (error);
 1140 
 1141         error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
 1142         if (error)
 1143                 return (ENOTDIR);
 1144 
 1145         if (fp->f_dirblbuf == NULL) {
 1146                 fp->f_dirblsz = vap->va_a_iroot->ir_size;
 1147                 fp->f_dirblbuf = malloc(max(vap->va_datalen,fp->f_dirblsz),
 1148                     M_NTFSDIR, M_WAITOK);
 1149         }
 1150 
 1151         blsize = fp->f_dirblsz;
 1152         rdbuf = fp->f_dirblbuf;
 1153 
 1154         dprintf(("ntfs_ntreaddir: rdbuf: %p, blsize: %d\n", rdbuf, blsize));
 1155 
 1156         if (vap->va_a_iroot->ir_flag & NTFS_IRFLAG_INDXALLOC) {
 1157                 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXBITMAP, "$I30",
 1158                                         0, &bmvap);
 1159                 if (error) {
 1160                         error = ENOTDIR;
 1161                         goto fail;
 1162                 }
 1163                 bmp = malloc(bmvap->va_datalen, M_TEMP, M_WAITOK);
 1164                 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 0,
 1165                                        bmvap->va_datalen, bmp, NULL);
 1166                 if (error)
 1167                         goto fail;
 1168 
 1169                 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDX, "$I30",
 1170                                         0, &iavap);
 1171                 if (error) {
 1172                         error = ENOTDIR;
 1173                         goto fail;
 1174                 }
 1175                 cpbl = ntfs_btocn(blsize + ntfs_cntob(1) - 1);
 1176                 dprintf(("ntfs_ntreaddir: indexalloc: %jd, cpbl: %d\n",
 1177                          iavap->va_datalen, cpbl));
 1178         } else {
 1179                 dprintf(("ntfs_ntreadidir: w/o BitMap and IndexAllocation\n"));
 1180                 iavap = bmvap = NULL;
 1181                 bmp = NULL;
 1182         }
 1183 
 1184         /* Try use previous values */
 1185         if ((fp->f_lastdnum < num) && (fp->f_lastdnum != 0)) {
 1186                 attrnum = fp->f_lastdattr;
 1187                 aoff = fp->f_lastdoff;
 1188                 blnum = fp->f_lastdblnum;
 1189                 cnum = fp->f_lastdnum;
 1190         } else {
 1191                 attrnum = NTFS_A_INDXROOT;
 1192                 aoff = sizeof(struct attr_indexroot);
 1193                 blnum = 0;
 1194                 cnum = 0;
 1195         }
 1196 
 1197         do {
 1198                 dprintf(("ntfs_ntreaddir: scan: 0x%x, %d, %d, %d, %d\n",
 1199                          attrnum, (u_int32_t) blnum, cnum, num, aoff));
 1200                 rdsize = (attrnum == NTFS_A_INDXROOT) ? vap->va_datalen : blsize;
 1201                 error = ntfs_readattr(ntmp, ip, attrnum, "$I30",
 1202                                 ntfs_cntob(blnum * cpbl), rdsize, rdbuf, NULL);
 1203                 if (error)
 1204                         goto fail;
 1205 
 1206                 if (attrnum == NTFS_A_INDX) {
 1207                         error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
 1208                                                 rdbuf, rdsize);
 1209                         if (error)
 1210                                 goto fail;
 1211                 }
 1212                 if (aoff == 0)
 1213                         aoff = (attrnum == NTFS_A_INDX) ?
 1214                                 (0x18 + ((struct attr_indexalloc *) rdbuf)->ia_hdrsize) :
 1215                                 sizeof(struct attr_indexroot);
 1216 
 1217                 iep = (struct attr_indexentry *) (rdbuf + aoff);
 1218                 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
 1219                         aoff += iep->reclen,
 1220                         iep = (struct attr_indexentry *) (rdbuf + aoff))
 1221                 {
 1222                         if (!ntfs_isnamepermitted(ntmp, iep)) continue;
 1223 
 1224                         if (cnum >= num) {
 1225                                 fp->f_lastdnum = cnum;
 1226                                 fp->f_lastdoff = aoff;
 1227                                 fp->f_lastdblnum = blnum;
 1228                                 fp->f_lastdattr = attrnum;
 1229 
 1230                                 *riepp = iep;
 1231 
 1232                                 error = 0;
 1233                                 goto fail;
 1234                         }
 1235                         cnum++;
 1236                 }
 1237 
 1238                 if (iavap) {
 1239                         if (attrnum == NTFS_A_INDXROOT)
 1240                                 blnum = 0;
 1241                         else
 1242                                 blnum++;
 1243 
 1244                         while (ntfs_cntob(blnum * cpbl) < iavap->va_datalen) {
 1245                                 if (bmp[blnum >> 3] & (1 << (blnum & 7)))
 1246                                         break;
 1247                                 blnum++;
 1248                         }
 1249 
 1250                         attrnum = NTFS_A_INDX;
 1251                         aoff = 0;
 1252                         if (ntfs_cntob(blnum * cpbl) >= iavap->va_datalen)
 1253                                 break;
 1254                         dprintf(("ntfs_ntreaddir: blnum: %d\n", (u_int32_t) blnum));
 1255                 }
 1256         } while (iavap);
 1257 
 1258         *riepp = NULL;
 1259         fp->f_lastdnum = 0;
 1260 
 1261 fail:
 1262         if (vap)
 1263                 ntfs_ntvattrrele(vap);
 1264         if (bmvap)
 1265                 ntfs_ntvattrrele(bmvap);
 1266         if (iavap)
 1267                 ntfs_ntvattrrele(iavap);
 1268         if (bmp)
 1269                 free(bmp, M_TEMP);
 1270         ntfs_ntput(ip);
 1271         return (error);
 1272 }
 1273 
 1274 /*
 1275  * Convert NTFS times that are in 100 ns units and begins from
 1276  * 1601 Jan 1 into unix times.
 1277  */
 1278 struct timespec
 1279 ntfs_nttimetounix(
 1280                   u_int64_t nt)
 1281 {
 1282         struct timespec t;
 1283 
 1284         /* WindowNT times are in 100 ns and from 1601 Jan 1 */
 1285         t.tv_nsec = (nt % (1000 * 1000 * 10)) * 100;
 1286         t.tv_sec = nt / (1000 * 1000 * 10) -
 1287                 369LL * 365LL * 24LL * 60LL * 60LL -
 1288                 89LL * 1LL * 24LL * 60LL * 60LL;
 1289         return (t);
 1290 }
 1291 
 1292 /*
 1293  * Get file times from NTFS_A_NAME attribute.
 1294  */
 1295 int
 1296 ntfs_times(
 1297            struct ntfsmount * ntmp,
 1298            struct ntnode * ip,
 1299            ntfs_times_t * tm)
 1300 {
 1301         struct ntvattr *vap;
 1302         int             error;
 1303 
 1304         dprintf(("ntfs_times: ino: %d...\n", ip->i_number));
 1305 
 1306         error = ntfs_ntget(ip);
 1307         if (error)
 1308                 return (error);
 1309 
 1310         error = ntfs_ntvattrget(ntmp, ip, NTFS_A_NAME, NULL, 0, &vap);
 1311         if (error) {
 1312                 ntfs_ntput(ip);
 1313                 return (error);
 1314         }
 1315         *tm = vap->va_a_name->n_times;
 1316         ntfs_ntvattrrele(vap);
 1317         ntfs_ntput(ip);
 1318 
 1319         return (0);
 1320 }
 1321 
 1322 /*
 1323  * Get file sizes from corresponding attribute. 
 1324  * 
 1325  * ntnode under fnode should be locked.
 1326  */
 1327 int
 1328 ntfs_filesize(
 1329               struct ntfsmount * ntmp,
 1330               struct fnode * fp,
 1331               u_int64_t * size,
 1332               u_int64_t * bytes)
 1333 {
 1334         struct ntvattr *vap;
 1335         struct ntnode *ip = FTONT(fp);
 1336         u_int64_t       sz, bn;
 1337         int             error;
 1338 
 1339         dprintf(("ntfs_filesize: ino: %d\n", ip->i_number));
 1340 
 1341         error = ntfs_ntvattrget(ntmp, ip,
 1342                 fp->f_attrtype, fp->f_attrname, 0, &vap);
 1343         if (error)
 1344                 return (error);
 1345 
 1346         bn = vap->va_allocated;
 1347         sz = vap->va_datalen;
 1348 
 1349         dprintf(("ntfs_filesize: %d bytes (%d bytes allocated)\n",
 1350                 (u_int32_t) sz, (u_int32_t) bn));
 1351 
 1352         if (size)
 1353                 *size = sz;
 1354         if (bytes)
 1355                 *bytes = bn;
 1356 
 1357         ntfs_ntvattrrele(vap);
 1358 
 1359         return (0);
 1360 }
 1361 
 1362 /*
 1363  * This is one of write routine.
 1364  */
 1365 int
 1366 ntfs_writeattr_plain(
 1367         struct ntfsmount * ntmp,
 1368         struct ntnode * ip,
 1369         u_int32_t attrnum,      
 1370         char *attrname,
 1371         off_t roff,
 1372         size_t rsize,
 1373         void *rdata,
 1374         size_t * initp,
 1375         struct uio *uio)
 1376 {
 1377         size_t          init;
 1378         int             error = 0;
 1379         off_t           off = roff, left = rsize, towrite;
 1380         caddr_t         data = rdata;
 1381         struct ntvattr *vap;
 1382         *initp = 0;
 1383 
 1384         while (left) {
 1385                 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
 1386                                         ntfs_btocn(off), &vap);
 1387                 if (error)
 1388                         return (error);
 1389                 towrite = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off);
 1390                 ddprintf(("ntfs_writeattr_plain: o: %d, s: %d (%d - %d)\n",
 1391                          (u_int32_t) off, (u_int32_t) towrite,
 1392                          (u_int32_t) vap->va_vcnstart,
 1393                          (u_int32_t) vap->va_vcnend));
 1394                 error = ntfs_writentvattr_plain(ntmp, ip, vap,
 1395                                          off - ntfs_cntob(vap->va_vcnstart),
 1396                                          towrite, data, &init, uio);
 1397                 if (error) {
 1398                         printf("ntfs_writeattr_plain: " \
 1399                                "ntfs_writentvattr_plain failed: o: %d, s: %d\n",
 1400                                (u_int32_t) off, (u_int32_t) towrite);
 1401                         printf("ntfs_writeattr_plain: attrib: %d - %d\n",
 1402                                (u_int32_t) vap->va_vcnstart, 
 1403                                (u_int32_t) vap->va_vcnend);
 1404                         ntfs_ntvattrrele(vap);
 1405                         break;
 1406                 }
 1407                 ntfs_ntvattrrele(vap);
 1408                 left -= towrite;
 1409                 off += towrite;
 1410                 data = data + towrite;
 1411                 *initp += init;
 1412         }
 1413 
 1414         return (error);
 1415 }
 1416 
 1417 /*
 1418  * This is one of write routine.
 1419  *
 1420  * ntnode should be locked.
 1421  */
 1422 int
 1423 ntfs_writentvattr_plain(
 1424         struct ntfsmount * ntmp,
 1425         struct ntnode * ip,
 1426         struct ntvattr * vap,
 1427         off_t roff,
 1428         size_t rsize,
 1429         void *rdata,
 1430         size_t * initp,
 1431         struct uio *uio)
 1432 {
 1433         int             error = 0;
 1434         off_t           off;
 1435         int             cnt;
 1436         cn_t            ccn, ccl, cn, left, cl;
 1437         caddr_t         data = rdata;
 1438         struct buf     *bp;
 1439         size_t          tocopy;
 1440 
 1441         *initp = 0;
 1442 
 1443         if ((vap->va_flag & NTFS_AF_INRUN) == 0) {
 1444                 printf("ntfs_writevattr_plain: CAN'T WRITE RES. ATTRIBUTE\n");
 1445                 return ENOTTY;
 1446         }
 1447 
 1448         ddprintf(("ntfs_writentvattr_plain: data in run: %ld chains\n",
 1449                  vap->va_vruncnt));
 1450 
 1451         off = roff;
 1452         left = rsize;
 1453         ccl = 0;
 1454         ccn = 0;
 1455         cnt = 0;
 1456         for (; left && (cnt < vap->va_vruncnt); cnt++) {
 1457                 ccn = vap->va_vruncn[cnt];
 1458                 ccl = vap->va_vruncl[cnt];
 1459 
 1460                 ddprintf(("ntfs_writentvattr_plain: " \
 1461                          "left %d, cn: 0x%x, cl: %d, off: %d\n", \
 1462                          (u_int32_t) left, (u_int32_t) ccn, \
 1463                          (u_int32_t) ccl, (u_int32_t) off));
 1464 
 1465                 if (ntfs_cntob(ccl) < off) {
 1466                         off -= ntfs_cntob(ccl);
 1467                         cnt++;
 1468                         continue;
 1469                 }
 1470                 if (!ccn && ip->i_number != NTFS_BOOTINO)
 1471                         continue; /* XXX */
 1472 
 1473                 ccl -= ntfs_btocn(off);
 1474                 cn = ccn + ntfs_btocn(off);
 1475                 off = ntfs_btocnoff(off);
 1476 
 1477                 while (left && ccl) {
 1478                         /*
 1479                          * Always read and write single clusters at a time -
 1480                          * we need to avoid requesting differently-sized
 1481                          * blocks at the same disk offsets to avoid
 1482                          * confusing the buffer cache.
 1483                          */
 1484                         tocopy = MIN(left, ntfs_cntob(1) - off);
 1485                         cl = ntfs_btocl(tocopy + off);
 1486                         KASSERT(cl == 1 && tocopy <= ntfs_cntob(1),
 1487                             ("single cluster limit mistake"));
 1488                         ddprintf(("ntfs_writentvattr_plain: write: " \
 1489                                 "cn: 0x%x cl: %d, off: %d len: %d, left: %d\n",
 1490                                 (u_int32_t) cn, (u_int32_t) cl, 
 1491                                 (u_int32_t) off, (u_int32_t) tocopy, 
 1492                                 (u_int32_t) left));
 1493                         if ((off == 0) && (tocopy == ntfs_cntob(cl)))
 1494                         {
 1495                                 bp = getblk(ntmp->ntm_devvp, ntfs_cntobn(cn)
 1496                                             * ntmp->ntm_multiplier,
 1497                                             ntfs_cntob(cl), 0, 0, 0);
 1498                                 clrbuf(bp);
 1499                         } else {
 1500                                 error = bread(ntmp->ntm_devvp, ntfs_cntobn(cn)
 1501                                               * ntmp->ntm_multiplier,
 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         off_t           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                                                       * ntmp->ntm_multiplier,
 1610                                                       ntfs_cntob(cl),
 1611                                                       NOCRED, &bp);
 1612                                         if (error) {
 1613                                                 brelse(bp);
 1614                                                 return (error);
 1615                                         }
 1616                                         if (uio) {
 1617                                                 uiomove(bp->b_data + off,
 1618                                                         tocopy, uio);
 1619                                         } else {
 1620                                                 memcpy(data, bp->b_data + off,
 1621                                                         tocopy);
 1622                                         }
 1623                                         brelse(bp);
 1624                                         data = data + tocopy;
 1625                                         *initp += tocopy;
 1626                                         off = 0;
 1627                                         left -= tocopy;
 1628                                         cn += cl;
 1629                                         ccl -= cl;
 1630                                 }
 1631                         } else {
 1632                                 tocopy = MIN(left, ntfs_cntob(ccl) - off);
 1633                                 ddprintf(("ntfs_readntvattr_plain: "
 1634                                         "hole: ccn: 0x%x ccl: %d, off: %d, " \
 1635                                         " len: %d, left: %d\n", 
 1636                                         (u_int32_t) ccn, (u_int32_t) ccl, 
 1637                                         (u_int32_t) off, (u_int32_t) tocopy, 
 1638                                         (u_int32_t) left));
 1639                                 left -= tocopy;
 1640                                 off = 0;
 1641                                 if (uio) {
 1642                                         size_t remains = tocopy;
 1643                                         for(; remains; remains--)
 1644                                                 uiomove("", 1, uio);
 1645                                 } else 
 1646                                         bzero(data, tocopy);
 1647                                 data = data + tocopy;
 1648                         }
 1649                         cnt++;
 1650                 }
 1651                 if (left) {
 1652                         printf("ntfs_readntvattr_plain: POSSIBLE RUN ERROR\n");
 1653                         error = E2BIG;
 1654                 }
 1655         } else {
 1656                 ddprintf(("ntfs_readnvattr_plain: data is in mft record\n"));
 1657                 if (uio) 
 1658                         uiomove(vap->va_datap + roff, rsize, uio);
 1659                 else
 1660                         memcpy(rdata, vap->va_datap + roff, rsize);
 1661                 *initp += rsize;
 1662         }
 1663 
 1664         return (error);
 1665 }
 1666 
 1667 /*
 1668  * This is one of read routines.
 1669  */
 1670 int
 1671 ntfs_readattr_plain(
 1672         struct ntfsmount * ntmp,
 1673         struct ntnode * ip,
 1674         u_int32_t attrnum,      
 1675         char *attrname,
 1676         off_t roff,
 1677         size_t rsize,
 1678         void *rdata,
 1679         size_t * initp,
 1680         struct uio *uio)
 1681 {
 1682         size_t          init;
 1683         int             error = 0;
 1684         off_t           off = roff, left = rsize, toread;
 1685         caddr_t         data = rdata;
 1686         struct ntvattr *vap;
 1687         *initp = 0;
 1688 
 1689         while (left) {
 1690                 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
 1691                                         ntfs_btocn(off), &vap);
 1692                 if (error)
 1693                         return (error);
 1694                 toread = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off);
 1695                 ddprintf(("ntfs_readattr_plain: o: %d, s: %d (%d - %d)\n",
 1696                          (u_int32_t) off, (u_int32_t) toread,
 1697                          (u_int32_t) vap->va_vcnstart,
 1698                          (u_int32_t) vap->va_vcnend));
 1699                 error = ntfs_readntvattr_plain(ntmp, ip, vap,
 1700                                          off - ntfs_cntob(vap->va_vcnstart),
 1701                                          toread, data, &init, uio);
 1702                 if (error) {
 1703                         printf("ntfs_readattr_plain: " \
 1704                                "ntfs_readntvattr_plain failed: o: %d, s: %d\n",
 1705                                (u_int32_t) off, (u_int32_t) toread);
 1706                         printf("ntfs_readattr_plain: attrib: %d - %d\n",
 1707                                (u_int32_t) vap->va_vcnstart, 
 1708                                (u_int32_t) vap->va_vcnend);
 1709                         ntfs_ntvattrrele(vap);
 1710                         break;
 1711                 }
 1712                 ntfs_ntvattrrele(vap);
 1713                 left -= toread;
 1714                 off += toread;
 1715                 data = data + toread;
 1716                 *initp += init;
 1717         }
 1718 
 1719         return (error);
 1720 }
 1721 
 1722 /*
 1723  * This is one of read routines.
 1724  */
 1725 int
 1726 ntfs_readattr(
 1727         struct ntfsmount * ntmp,
 1728         struct ntnode * ip,
 1729         u_int32_t attrnum,
 1730         char *attrname,
 1731         off_t roff,
 1732         size_t rsize,
 1733         void *rdata,
 1734         struct uio *uio)
 1735 {
 1736         int             error = 0;
 1737         struct ntvattr *vap;
 1738         size_t          init;
 1739 
 1740         ddprintf(("ntfs_readattr: reading %d: 0x%x, from %d size %d bytes\n",
 1741                ip->i_number, attrnum, (u_int32_t) roff, (u_int32_t) rsize));
 1742 
 1743         error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 0, &vap);
 1744         if (error)
 1745                 return (error);
 1746 
 1747         if ((roff > vap->va_datalen) ||
 1748             (roff + rsize > vap->va_datalen)) {
 1749                 ddprintf(("ntfs_readattr: offset too big\n"));
 1750                 ntfs_ntvattrrele(vap);
 1751                 return (E2BIG);
 1752         }
 1753         if (vap->va_compression && vap->va_compressalg) {
 1754                 u_int8_t       *cup;
 1755                 u_int8_t       *uup;
 1756                 off_t           off = roff, left = rsize, tocopy;
 1757                 caddr_t         data = rdata;
 1758                 cn_t            cn;
 1759 
 1760                 ddprintf(("ntfs_ntreadattr: compression: %d\n",
 1761                          vap->va_compressalg));
 1762 
 1763                 cup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL),
 1764                        M_NTFSDECOMP, M_WAITOK);
 1765                 uup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL),
 1766                        M_NTFSDECOMP, M_WAITOK);
 1767 
 1768                 cn = (ntfs_btocn(roff)) & (~(NTFS_COMPUNIT_CL - 1));
 1769                 off = roff - ntfs_cntob(cn);
 1770 
 1771                 while (left) {
 1772                         error = ntfs_readattr_plain(ntmp, ip, attrnum,
 1773                                                   attrname, ntfs_cntob(cn),
 1774                                                   ntfs_cntob(NTFS_COMPUNIT_CL),
 1775                                                   cup, &init, NULL);
 1776                         if (error)
 1777                                 break;
 1778 
 1779                         tocopy = MIN(left, ntfs_cntob(NTFS_COMPUNIT_CL) - off);
 1780 
 1781                         if (init == ntfs_cntob(NTFS_COMPUNIT_CL)) {
 1782                                 if (uio)
 1783                                         uiomove(cup + off, tocopy, uio);
 1784                                 else
 1785                                         memcpy(data, cup + off, tocopy);
 1786                         } else if (init == 0) {
 1787                                 if (uio) {
 1788                                         size_t remains = tocopy;
 1789                                         for(; remains; remains--)
 1790                                                 uiomove("", 1, uio);
 1791                                 }
 1792                                 else
 1793                                         bzero(data, tocopy);
 1794                         } else {
 1795                                 error = ntfs_uncompunit(ntmp, uup, cup);
 1796                                 if (error)
 1797                                         break;
 1798                                 if (uio)
 1799                                         uiomove(uup + off, tocopy, uio);
 1800                                 else
 1801                                         memcpy(data, uup + off, tocopy);
 1802                         }
 1803 
 1804                         left -= tocopy;
 1805                         data = data + tocopy;
 1806                         off += tocopy - ntfs_cntob(NTFS_COMPUNIT_CL);
 1807                         cn += NTFS_COMPUNIT_CL;
 1808                 }
 1809 
 1810                 free(uup, M_NTFSDECOMP);
 1811                 free(cup, M_NTFSDECOMP);
 1812         } else
 1813                 error = ntfs_readattr_plain(ntmp, ip, attrnum, attrname,
 1814                                              roff, rsize, rdata, &init, uio);
 1815         ntfs_ntvattrrele(vap);
 1816         return (error);
 1817 }
 1818 
 1819 #if 0
 1820 int
 1821 ntfs_parserun(
 1822               cn_t * cn,
 1823               cn_t * cl,
 1824               u_int8_t * run,
 1825               u_long len,
 1826               u_long *off)
 1827 {
 1828         u_int8_t        sz;
 1829         int             i;
 1830 
 1831         if (NULL == run) {
 1832                 printf("ntfs_parsetun: run == NULL\n");
 1833                 return (EINVAL);
 1834         }
 1835         sz = run[(*off)++];
 1836         if (0 == sz) {
 1837                 printf("ntfs_parserun: trying to go out of run\n");
 1838                 return (E2BIG);
 1839         }
 1840         *cl = 0;
 1841         if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
 1842                 printf("ntfs_parserun: " \
 1843                        "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
 1844                        sz, len, *off);
 1845                 return (EINVAL);
 1846         }
 1847         for (i = 0; i < (sz & 0xF); i++)
 1848                 *cl += (u_int32_t) run[(*off)++] << (i << 3);
 1849 
 1850         sz >>= 4;
 1851         if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
 1852                 printf("ntfs_parserun: " \
 1853                        "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
 1854                        sz, len, *off);
 1855                 return (EINVAL);
 1856         }
 1857         for (i = 0; i < (sz & 0xF); i++)
 1858                 *cn += (u_int32_t) run[(*off)++] << (i << 3);
 1859 
 1860         return (0);
 1861 }
 1862 #endif
 1863 
 1864 /*
 1865  * Process fixup routine on given buffer.
 1866  */
 1867 int
 1868 ntfs_procfixups(
 1869                 struct ntfsmount * ntmp,
 1870                 u_int32_t magic,
 1871                 caddr_t buf,
 1872                 size_t len)
 1873 {
 1874         struct fixuphdr *fhp = (struct fixuphdr *) buf;
 1875         int             i;
 1876         u_int16_t       fixup;
 1877         u_int16_t      *fxp;
 1878         u_int16_t      *cfxp;
 1879 
 1880         if (fhp->fh_magic != magic) {
 1881                 printf("ntfs_procfixups: magic doesn't match: %08x != %08x\n",
 1882                        fhp->fh_magic, magic);
 1883                 return (EINVAL);
 1884         }
 1885         if ((fhp->fh_fnum - 1) * NTFS_BLOCK_SIZE != len) {
 1886                 printf("ntfs_procfixups: " \
 1887                        "bad fixups number: %d for %ld bytes block\n", 
 1888                        fhp->fh_fnum, (long)len);        /* XXX printf kludge */
 1889                 return (EINVAL);
 1890         }
 1891         if (fhp->fh_foff >= ntmp->ntm_spc * ntmp->ntm_mftrecsz * ntmp->ntm_bps) {
 1892                 printf("ntfs_procfixups: invalid offset: %x", fhp->fh_foff);
 1893                 return (EINVAL);
 1894         }
 1895         fxp = (u_int16_t *) (buf + fhp->fh_foff);
 1896         cfxp = (u_int16_t *) (buf + NTFS_BLOCK_SIZE - 2);
 1897         fixup = *fxp++;
 1898         for (i = 1; i < fhp->fh_fnum; i++, fxp++) {
 1899                 if (*cfxp != fixup) {
 1900                         printf("ntfs_procfixups: fixup %d doesn't match\n", i);
 1901                         return (EINVAL);
 1902                 }
 1903                 *cfxp = *fxp;
 1904                 cfxp = (u_int16_t *) ((caddr_t) cfxp + NTFS_BLOCK_SIZE);
 1905         }
 1906         return (0);
 1907 }
 1908 
 1909 #if 0
 1910 int
 1911 ntfs_runtocn(
 1912              cn_t * cn, 
 1913              struct ntfsmount * ntmp,
 1914              u_int8_t * run,
 1915              u_long len,
 1916              cn_t vcn)
 1917 {
 1918         cn_t            ccn = 0;
 1919         cn_t            ccl = 0;
 1920         u_long          off = 0;
 1921         int             error = 0;
 1922 
 1923 #if NTFS_DEBUG
 1924         int             i;
 1925         printf("ntfs_runtocn: run: %p, %ld bytes, vcn:%ld\n",
 1926                 run, len, (u_long) vcn);
 1927         printf("ntfs_runtocn: run: ");
 1928         for (i = 0; i < len; i++)
 1929                 printf("0x%02x ", run[i]);
 1930         printf("\n");
 1931 #endif
 1932 
 1933         if (NULL == run) {
 1934                 printf("ntfs_runtocn: run == NULL\n");
 1935                 return (EINVAL);
 1936         }
 1937         do {
 1938                 if (run[off] == 0) {
 1939                         printf("ntfs_runtocn: vcn too big\n");
 1940                         return (E2BIG);
 1941                 }
 1942                 vcn -= ccl;
 1943                 error = ntfs_parserun(&ccn, &ccl, run, len, &off);
 1944                 if (error) {
 1945                         printf("ntfs_runtocn: ntfs_parserun failed\n");
 1946                         return (error);
 1947                 }
 1948         } while (ccl <= vcn);
 1949         *cn = ccn + vcn;
 1950         return (0);
 1951 }
 1952 #endif
 1953 
 1954 /*
 1955  * this initializes toupper table & dependant variables to be ready for
 1956  * later work
 1957  */
 1958 void
 1959 ntfs_toupper_init()
 1960 {
 1961         ntfs_toupper_tab = (wchar *) NULL;
 1962         lockinit(&ntfs_toupper_lock, PVFS, "ntfs_toupper", 0, 0);
 1963         ntfs_toupper_usecount = 0;
 1964 }
 1965 
 1966 void
 1967 ntfs_toupper_destroy(void)
 1968 {
 1969 
 1970         lockdestroy(&ntfs_toupper_lock);
 1971 }
 1972 
 1973 /*
 1974  * if the ntfs_toupper_tab[] is filled already, just raise use count;
 1975  * otherwise read the data from the filesystem we are currently mounting
 1976  */
 1977 int
 1978 ntfs_toupper_use(mp, ntmp)
 1979         struct mount *mp;
 1980         struct ntfsmount *ntmp;
 1981 {
 1982         int error = 0;
 1983         struct vnode *vp;
 1984 
 1985         /* get exclusive access */
 1986         lockmgr(&ntfs_toupper_lock, LK_EXCLUSIVE, NULL);
 1987         
 1988         /* only read the translation data from a file if it hasn't been
 1989          * read already */
 1990         if (ntfs_toupper_tab)
 1991                 goto out;
 1992 
 1993         /*
 1994          * Read in Unicode lowercase -> uppercase translation file.
 1995          * XXX for now, just the first 256 entries are used anyway,
 1996          * so don't bother reading more
 1997          */
 1998         ntfs_toupper_tab = malloc(65536 * sizeof(wchar),
 1999                 M_NTFSRDATA, M_WAITOK);
 2000 
 2001         if ((error = VFS_VGET(mp, NTFS_UPCASEINO, LK_EXCLUSIVE, &vp)))
 2002                 goto out;
 2003         error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
 2004                         0, 65536*sizeof(wchar), (char *) ntfs_toupper_tab, NULL);
 2005         vput(vp);
 2006 
 2007     out:
 2008         ntfs_toupper_usecount++;
 2009         lockmgr(&ntfs_toupper_lock, LK_RELEASE, NULL);
 2010         return (error);
 2011 }
 2012 
 2013 /*
 2014  * lower the use count and if it reaches zero, free the memory
 2015  * tied by toupper table
 2016  */
 2017 void
 2018 ntfs_toupper_unuse()
 2019 {
 2020         /* get exclusive access */
 2021         lockmgr(&ntfs_toupper_lock, LK_EXCLUSIVE, NULL);
 2022 
 2023         ntfs_toupper_usecount--;
 2024         if (ntfs_toupper_usecount == 0) {
 2025                 free(ntfs_toupper_tab, M_NTFSRDATA);
 2026                 ntfs_toupper_tab = NULL;
 2027         }
 2028 #ifdef DIAGNOSTIC
 2029         else if (ntfs_toupper_usecount < 0) {
 2030                 panic("ntfs_toupper_unuse(): use count negative: %d\n",
 2031                         ntfs_toupper_usecount);
 2032         }
 2033 #endif
 2034         
 2035         /* release the lock */
 2036         lockmgr(&ntfs_toupper_lock, LK_RELEASE, NULL);
 2037 } 
 2038 
 2039 int
 2040 ntfs_u28_init(
 2041         struct ntfsmount *ntmp,
 2042         wchar *u2w,
 2043         char *cs_local,
 2044         char *cs_ntfs)
 2045 {
 2046         char ** u28;
 2047         int i, j, h, l;
 2048 
 2049         if (ntfs_iconv && cs_local) {
 2050                 ntfs_iconv->open(cs_local, cs_ntfs, &ntmp->ntm_ic_u2l);
 2051                 return (0);
 2052         }
 2053 
 2054         u28 = malloc(256 * sizeof(char*), M_TEMP, M_WAITOK | M_ZERO);
 2055 
 2056         for (i=0; i<256; i++) {
 2057                 h = (u2w[i] >> 8) & 0xFF;
 2058                 l = (u2w[i]) &0xFF;
 2059 
 2060                 if (u28[h] == NULL) {
 2061                         u28[h] = malloc(256 * sizeof(char), M_TEMP, M_WAITOK);
 2062                         for (j=0; j<256; j++)
 2063                                 u28[h][j] = '_';
 2064                 }
 2065 
 2066                 u28[h][l] = i & 0xFF;
 2067         }
 2068 
 2069         ntmp->ntm_u28 = u28;
 2070 
 2071         return (0);
 2072 }
 2073 
 2074 int
 2075 ntfs_u28_uninit(struct ntfsmount *ntmp)
 2076 {
 2077         char ** u28;
 2078         int i;
 2079 
 2080         if (ntmp->ntm_u28 == NULL) {
 2081                 if (ntfs_iconv && ntmp->ntm_ic_u2l) {
 2082                         ntfs_iconv->close(ntmp->ntm_ic_u2l);
 2083                 }
 2084                 return (0);
 2085         }
 2086 
 2087         u28 = ntmp->ntm_u28;
 2088 
 2089         for (i=0; i<256; i++)
 2090                 if (u28[i] != NULL)
 2091                         free(u28[i], M_TEMP);
 2092 
 2093         free(u28, M_TEMP);
 2094 
 2095         return (0);
 2096 }
 2097 
 2098 int
 2099 ntfs_82u_init(
 2100         struct ntfsmount *ntmp,
 2101         char *cs_local,
 2102         char *cs_ntfs)
 2103 {
 2104         wchar * _82u;
 2105         int i;
 2106 
 2107         if (ntfs_iconv && cs_local) {
 2108                 ntfs_iconv->open(cs_ntfs, cs_local, &ntmp->ntm_ic_l2u);
 2109                 return (0);
 2110         }
 2111 
 2112         _82u = malloc(256 * sizeof(wchar), M_TEMP, M_WAITOK);
 2113 
 2114         for (i=0; i<256; i++)
 2115                         _82u[i] = i;
 2116 
 2117         ntmp->ntm_82u = _82u;
 2118 
 2119         return (0);
 2120 }
 2121 
 2122 int
 2123 ntfs_82u_uninit(struct ntfsmount *ntmp)
 2124 {
 2125 
 2126         if (ntmp->ntm_82u == NULL) {
 2127                 if (ntfs_iconv && ntmp->ntm_ic_l2u) {
 2128                         ntfs_iconv->close(ntmp->ntm_ic_l2u);
 2129                 }
 2130                 return (0);
 2131         }
 2132 
 2133         free(ntmp->ntm_82u, M_TEMP);
 2134         return (0);
 2135 }
 2136 
 2137 /*
 2138  * maps the Unicode char to 8bit equivalent
 2139  * XXX currently only gets lower 8bit from the Unicode char
 2140  * and substitutes a '_' for it if the result would be '\0';
 2141  * something better has to be definitely though out
 2142  */
 2143 wchar
 2144 ntfs_u28(
 2145         struct ntfsmount *ntmp, 
 2146         wchar wc)
 2147 {
 2148         char *p, *outp, inbuf[3], outbuf[3];
 2149         size_t ilen, olen;
 2150 
 2151         if (ntfs_iconv && ntmp->ntm_ic_u2l) {
 2152                 ilen = olen = 2;
 2153 
 2154                 inbuf[0] = (char)(wc>>8);
 2155                 inbuf[1] = (char)wc;
 2156                 inbuf[2] = '\0';
 2157                 p = inbuf;
 2158                 outp = outbuf;
 2159                 ntfs_iconv->convchr(ntmp->ntm_ic_u2l, (const char **)&p, &ilen,
 2160                                     &outp, &olen);
 2161                 if (olen == 1) {
 2162                         return ((wchar)(outbuf[0]&0xFF));
 2163                 } else if (olen == 0) {
 2164                         return ((wchar)((outbuf[0]<<8) | (outbuf[1]&0xFF)));
 2165                 }
 2166                 return ('?');
 2167         }
 2168 
 2169         p = ntmp->ntm_u28[(wc>>8)&0xFF];
 2170         if (p == NULL)
 2171                 return ('_');
 2172         return (p[wc&0xFF]&0xFF);
 2173 }
 2174 
 2175 wchar
 2176 ntfs_82u(
 2177         struct ntfsmount *ntmp, 
 2178         wchar wc,
 2179         int *len)
 2180 {
 2181         char *p, *outp, inbuf[3], outbuf[3];
 2182         wchar uc;
 2183         size_t ilen, olen;
 2184 
 2185         if (ntfs_iconv && ntmp->ntm_ic_l2u) {
 2186                 ilen = (size_t)*len;
 2187                 olen = 2;
 2188 
 2189                 inbuf[0] = (char)(wc>>8);
 2190                 inbuf[1] = (char)wc;
 2191                 inbuf[2] = '\0';
 2192                 p = inbuf;
 2193                 outp = outbuf;
 2194                 ntfs_iconv->convchr(ntmp->ntm_ic_l2u, (const char **)&p, &ilen,
 2195                                     &outp, &olen);
 2196                 *len -= (int)ilen;
 2197                 uc = (wchar)((outbuf[0]<<8) | (outbuf[1]&0xFF));
 2198 
 2199                 return (uc);
 2200         }
 2201 
 2202         if (ntmp->ntm_82u != NULL)
 2203                 return (ntmp->ntm_82u[wc&0xFF]);
 2204 
 2205         return ('?');
 2206 }
 2207 

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