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/9.1/sys/fs/ntfs/ntfs_subr.c 230197 2012-01-16 05:22:18Z 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                 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         const char *astrp = astr;
  671         char tmpbuf[5];
  672         int len, res;
  673         size_t i, j, mbstrlen = astrlen;
  674 
  675         if (ntmp->ntm_ic_l2u) {
  676                 for (i = 0, j = 0; i < ustrlen && j < astrlen; i++) {
  677                         len = 4;
  678                         res = ((int) NTFS_TOUPPER(ustr[i])) -
  679                             ((int)NTFS_TOUPPER(NTFS_82U(astrp, &len)));
  680                         astrp += len;
  681                         j += len;
  682                         mbstrlen -= len - 1;
  683 
  684                         if (res)
  685                                 return res;
  686                 }
  687         } else {
  688                 /*
  689                  * We use NTFS_82U(NTFS_U28(c)) to get rid of unicode
  690                  * symbols not covered by translation table
  691                  */
  692                 for (i = 0; i < ustrlen && i < astrlen; i++) {
  693                         res = ((int) NTFS_TOUPPER(NTFS_82U(NTFS_U28(ustr[i]), &len))) -
  694                                 ((int)NTFS_TOUPPER(NTFS_82U(astrp, &len)));
  695                         astrp++;
  696                         if (res)
  697                                 return res;
  698                 }
  699         }
  700         return (ustrlen - mbstrlen);
  701 }
  702 
  703 /*
  704  * Compare unicode and ascii string case sens.
  705  */
  706 static int
  707 ntfs_uastrcmp(ntmp, ustr, ustrlen, astr, astrlen)
  708         struct ntfsmount *ntmp;
  709         const wchar *ustr;
  710         size_t ustrlen;
  711         const char *astr;
  712         size_t astrlen;
  713 {
  714         char *c, tmpbuf[5];
  715         size_t i, j, mbstrlen = astrlen;
  716         int res;
  717 
  718         for (i = 0, j = 0; (i < ustrlen) && (j < astrlen); i++, mbstrlen++) {
  719                 c = NTFS_U28(ustr[i]);
  720                 while (*c != '\0') {
  721                         res = (int) (*c++ - astr[j++]);
  722                         if (res)
  723                                 return res;
  724                         mbstrlen--;
  725                 }
  726         }
  727         return (ustrlen - mbstrlen);
  728 }
  729 
  730 /* 
  731  * Search fnode in ntnode, if not found allocate and preinitialize.
  732  *
  733  * ntnode should be locked on entry.
  734  */
  735 int
  736 ntfs_fget(
  737         struct ntfsmount *ntmp,
  738         struct ntnode *ip,
  739         int attrtype,
  740         char *attrname,
  741         struct fnode **fpp)
  742 {
  743         struct fnode *fp;
  744 
  745         dprintf(("ntfs_fget: ino: %d, attrtype: 0x%x, attrname: %s\n",
  746                 ip->i_number,attrtype, attrname?attrname:""));
  747         *fpp = NULL;
  748         LIST_FOREACH(fp, &ip->i_fnlist, f_fnlist){
  749                 dprintf(("ntfs_fget: fnode: attrtype: %d, attrname: %s\n",
  750                         fp->f_attrtype, fp->f_attrname?fp->f_attrname:""));
  751 
  752                 if ((attrtype == fp->f_attrtype) && 
  753                     ((!attrname && !fp->f_attrname) ||
  754                      (attrname && fp->f_attrname &&
  755                       !strcmp(attrname,fp->f_attrname)))){
  756                         dprintf(("ntfs_fget: found existed: %p\n",fp));
  757                         *fpp = fp;
  758                 }
  759         }
  760 
  761         if (*fpp)
  762                 return (0);
  763 
  764         fp = malloc(sizeof(struct fnode), M_NTFSFNODE,
  765                 M_WAITOK | M_ZERO);
  766         dprintf(("ntfs_fget: allocating fnode: %p\n",fp));
  767 
  768         fp->f_ip = ip;
  769         if (attrname) {
  770                 fp->f_flag |= FN_AATTRNAME;
  771                 fp->f_attrname = malloc(strlen(attrname)+1, M_TEMP, M_WAITOK);
  772                 strcpy(fp->f_attrname, attrname);
  773         } else
  774                 fp->f_attrname = NULL;
  775         fp->f_attrtype = attrtype;
  776 
  777         ntfs_ntref(ip);
  778 
  779         LIST_INSERT_HEAD(&ip->i_fnlist, fp, f_fnlist);
  780 
  781         *fpp = fp;
  782 
  783         return (0);
  784 }
  785 
  786 /*
  787  * Deallocate fnode, remove it from ntnode's fnode list.
  788  *
  789  * ntnode should be locked.
  790  */
  791 void
  792 ntfs_frele(
  793         struct fnode *fp)
  794 {
  795         struct ntnode *ip = FTONT(fp);
  796 
  797         dprintf(("ntfs_frele: fnode: %p for %d: %p\n", fp, ip->i_number, ip));
  798 
  799         dprintf(("ntfs_frele: deallocating fnode\n"));
  800         LIST_REMOVE(fp,f_fnlist);
  801         if (fp->f_flag & FN_AATTRNAME)
  802                 free(fp->f_attrname, M_TEMP);
  803         if (fp->f_dirblbuf)
  804                 free(fp->f_dirblbuf, M_NTFSDIR);
  805         free(fp, M_NTFSFNODE);
  806         ntfs_ntrele(ip);
  807 }
  808 
  809 /*
  810  * Lookup attribute name in format: [[:$ATTR_TYPE]:$ATTR_NAME], 
  811  * $ATTR_TYPE is searched in attrdefs read from $AttrDefs.
  812  * If $ATTR_TYPE nott specifed, ATTR_A_DATA assumed.
  813  */
  814 static int
  815 ntfs_ntlookupattr(
  816                 struct ntfsmount * ntmp,
  817                 const char * name,
  818                 int namelen,
  819                 int *attrtype,
  820                 char **attrname)
  821 {
  822         const char *sys;
  823         size_t syslen, i;
  824         struct ntvattrdef *adp;
  825 
  826         if (namelen == 0)
  827                 return (0);
  828 
  829         if (name[0] == '$') {
  830                 sys = name;
  831                 for (syslen = 0; syslen < namelen; syslen++) {
  832                         if(sys[syslen] == ':') {
  833                                 name++;
  834                                 namelen--;
  835                                 break;
  836                         }
  837                 }
  838                 name += syslen;
  839                 namelen -= syslen;
  840 
  841                 adp = ntmp->ntm_ad;
  842                 for (i = 0; i < ntmp->ntm_adnum; i++, adp++){
  843                         if (syslen != adp->ad_namelen || 
  844                            strncmp(sys, adp->ad_name, syslen) != 0)
  845                                 continue;
  846 
  847                         *attrtype = adp->ad_type;
  848                         goto out;
  849                 }
  850                 return (ENOENT);
  851         } else
  852                 *attrtype = NTFS_A_DATA;
  853 
  854     out:
  855         if (namelen) {
  856                 (*attrname) = malloc(namelen, M_TEMP, M_WAITOK);
  857                 memcpy((*attrname), name, namelen);
  858                 (*attrname)[namelen] = '\0';
  859         }
  860 
  861         return (0);
  862 }
  863 
  864 /*
  865  * Lookup specifed node for filename, matching cnp,
  866  * return fnode filled.
  867  */
  868 int
  869 ntfs_ntlookupfile(
  870               struct ntfsmount * ntmp,
  871               struct vnode * vp,
  872               struct componentname * cnp,
  873               struct vnode ** vpp)
  874 {
  875         struct fnode   *fp = VTOF(vp);
  876         struct ntnode  *ip = FTONT(fp);
  877         struct ntvattr *vap;    /* Root attribute */
  878         cn_t            cn;     /* VCN in current attribute */
  879         caddr_t         rdbuf;  /* Buffer to read directory's blocks  */
  880         u_int32_t       blsize;
  881         u_int64_t       rdsize; /* Length of data to read from current block */
  882         struct attr_indexentry *iep;
  883         int             error, res, anamelen, fnamelen;
  884         const char     *fname,*aname;
  885         u_int32_t       aoff;
  886         int attrtype = NTFS_A_DATA;
  887         char *attrname = NULL;
  888         struct fnode   *nfp;
  889         struct vnode   *nvp;
  890         enum vtype      f_type;
  891 
  892         error = ntfs_ntget(ip);
  893         if (error)
  894                 return (error);
  895 
  896         error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
  897         if (error || (vap->va_flag & NTFS_AF_INRUN))
  898                 return (ENOTDIR);
  899 
  900         blsize = vap->va_a_iroot->ir_size;
  901         rdsize = vap->va_datalen;
  902 
  903         /*
  904          * Divide file name into: foofilefoofilefoofile[:attrspec]
  905          * Store like this:       fname:fnamelen       [aname:anamelen]
  906          */
  907         fname = cnp->cn_nameptr;
  908         aname = NULL;
  909         anamelen = 0;
  910         for (fnamelen = 0; fnamelen < cnp->cn_namelen; fnamelen++)
  911                 if(fname[fnamelen] == ':') {
  912                         aname = fname + fnamelen + 1;
  913                         anamelen = cnp->cn_namelen - fnamelen - 1;
  914                         dprintf(("ntfs_ntlookupfile: %s (%d), attr: %s (%d)\n",
  915                                 fname, fnamelen, aname, anamelen));
  916                         break;
  917                 }
  918 
  919         dprintf(("ntfs_ntlookupfile: blksz: %d, rdsz: %jd\n", blsize, rdsize));
  920 
  921         rdbuf = malloc(blsize, M_TEMP, M_WAITOK);
  922 
  923         error = ntfs_readattr(ntmp, ip, NTFS_A_INDXROOT, "$I30",
  924                                0, rdsize, rdbuf, NULL);
  925         if (error)
  926                 goto fail;
  927 
  928         aoff = sizeof(struct attr_indexroot);
  929 
  930         do {
  931                 iep = (struct attr_indexentry *) (rdbuf + aoff);
  932 
  933                 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
  934                         aoff += iep->reclen,
  935                         iep = (struct attr_indexentry *) (rdbuf + aoff))
  936                 {
  937                         ddprintf(("scan: %d, %d\n",
  938                                   (u_int32_t) iep->ie_number,
  939                                   (u_int32_t) iep->ie_fnametype));
  940 
  941                         /* check the name - the case-insensitible check
  942                          * has to come first, to break from this for loop
  943                          * if needed, so we can dive correctly */
  944                         res = NTFS_UASTRICMP(iep->ie_fname, iep->ie_fnamelen,
  945                                 fname, fnamelen);
  946                         if (res > 0) break;
  947                         if (res < 0) continue;
  948 
  949                         if (iep->ie_fnametype == 0 ||
  950                             !(ntmp->ntm_flag & NTFS_MFLAG_CASEINS))
  951                         {
  952                                 res = NTFS_UASTRCMP(iep->ie_fname,
  953                                         iep->ie_fnamelen, fname, fnamelen);
  954                                 if (res != 0) continue;
  955                         }
  956 
  957                         if (aname) {
  958                                 error = ntfs_ntlookupattr(ntmp,
  959                                         aname, anamelen,
  960                                         &attrtype, &attrname);
  961                                 if (error)
  962                                         goto fail;
  963                         }
  964 
  965                         /* Check if we've found ourself */
  966                         if ((iep->ie_number == ip->i_number) &&
  967                             (attrtype == fp->f_attrtype) &&
  968                             ((!attrname && !fp->f_attrname) ||
  969                              (attrname && fp->f_attrname &&
  970                               !strcmp(attrname, fp->f_attrname))))
  971                         {
  972                                 VREF(vp);
  973                                 *vpp = vp;
  974                                 error = 0;
  975                                 goto fail;
  976                         }
  977 
  978                         /* vget node, but don't load it */
  979                         error = ntfs_vgetex(ntmp->ntm_mountp,
  980                                    iep->ie_number, attrtype, attrname,
  981                                    LK_EXCLUSIVE, VG_DONTLOADIN | VG_DONTVALIDFN,
  982                                    curthread, &nvp);
  983 
  984                         /* free the buffer returned by ntfs_ntlookupattr() */
  985                         if (attrname) {
  986                                 free(attrname, M_TEMP);
  987                                 attrname = NULL;
  988                         }
  989 
  990                         if (error)
  991                                 goto fail;
  992 
  993                         nfp = VTOF(nvp);
  994 
  995                         if (nfp->f_flag & FN_VALID) {
  996                                 *vpp = nvp;
  997                                 goto fail;
  998                         }
  999 
 1000                         nfp->f_fflag = iep->ie_fflag;
 1001                         nfp->f_pnumber = iep->ie_fpnumber;
 1002                         nfp->f_times = iep->ie_ftimes;
 1003 
 1004                         if((nfp->f_fflag & NTFS_FFLAG_DIR) &&
 1005                            (nfp->f_attrtype == NTFS_A_DATA) &&
 1006                            (nfp->f_attrname == NULL))
 1007                                 f_type = VDIR;  
 1008                         else
 1009                                 f_type = VREG;  
 1010 
 1011                         nvp->v_type = f_type;
 1012 
 1013                         if ((nfp->f_attrtype == NTFS_A_DATA) &&
 1014                             (nfp->f_attrname == NULL))
 1015                         {
 1016                                 /* Opening default attribute */
 1017                                 nfp->f_size = iep->ie_fsize;
 1018                                 nfp->f_allocated = iep->ie_fallocated;
 1019                                 nfp->f_flag |= FN_PRELOADED;
 1020                         } else {
 1021                                 error = ntfs_filesize(ntmp, nfp,
 1022                                             &nfp->f_size, &nfp->f_allocated);
 1023                                 if (error) {
 1024                                         vput(nvp);
 1025                                         goto fail;
 1026                                 }
 1027                         }
 1028 
 1029                         nfp->f_flag &= ~FN_VALID;
 1030                         *vpp = nvp;
 1031                         goto fail;
 1032                 }
 1033 
 1034                 /* Dive if possible */
 1035                 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) {
 1036                         dprintf(("ntfs_ntlookupfile: diving\n"));
 1037 
 1038                         cn = *(cn_t *) (rdbuf + aoff +
 1039                                         iep->reclen - sizeof(cn_t));
 1040                         rdsize = blsize;
 1041 
 1042                         error = ntfs_readattr(ntmp, ip, NTFS_A_INDX, "$I30",
 1043                                         ntfs_cntob(cn), rdsize, rdbuf, NULL);
 1044                         if (error)
 1045                                 goto fail;
 1046 
 1047                         error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
 1048                                                 rdbuf, rdsize);
 1049                         if (error)
 1050                                 goto fail;
 1051 
 1052                         aoff = (((struct attr_indexalloc *) rdbuf)->ia_hdrsize +
 1053                                 0x18);
 1054                 } else {
 1055                         dprintf(("ntfs_ntlookupfile: nowhere to dive :-(\n"));
 1056                         error = ENOENT;
 1057                         break;
 1058                 }
 1059         } while (1);
 1060 
 1061         dprintf(("finish\n"));
 1062 
 1063 fail:
 1064         if (attrname) free(attrname, M_TEMP);
 1065         ntfs_ntvattrrele(vap);
 1066         ntfs_ntput(ip);
 1067         free(rdbuf, M_TEMP);
 1068         return (error);
 1069 }
 1070 
 1071 /*
 1072  * Check if name type is permitted to show.
 1073  */
 1074 int
 1075 ntfs_isnamepermitted(
 1076                      struct ntfsmount * ntmp,
 1077                      struct attr_indexentry * iep)
 1078 {
 1079         if (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)
 1080                 return 1;
 1081 
 1082         switch (iep->ie_fnametype) {
 1083         case 2:
 1084                 ddprintf(("ntfs_isnamepermitted: skipped DOS name\n"));
 1085                 return 0;
 1086         case 0: case 1: case 3:
 1087                 return 1;
 1088         default:
 1089                 printf("ntfs_isnamepermitted: " \
 1090                        "WARNING! Unknown file name type: %d\n",
 1091                        iep->ie_fnametype);
 1092                 break;
 1093         }
 1094         return 0;
 1095 }
 1096 
 1097 /*
 1098  * Read ntfs dir like stream of attr_indexentry, not like btree of them.
 1099  * This is done by scaning $BITMAP:$I30 for busy clusters and reading them.
 1100  * Ofcouse $INDEX_ROOT:$I30 is read before. Last read values are stored in
 1101  * fnode, so we can skip toward record number num almost immediatly.
 1102  * Anyway this is rather slow routine. The problem is that we don't know
 1103  * how many records are there in $INDEX_ALLOCATION:$I30 block.
 1104  */
 1105 int
 1106 ntfs_ntreaddir(
 1107                struct ntfsmount * ntmp,
 1108                struct fnode * fp,
 1109                u_int32_t num,
 1110                struct attr_indexentry ** riepp)
 1111 {
 1112         struct ntnode  *ip = FTONT(fp);
 1113         struct ntvattr *vap = NULL;     /* IndexRoot attribute */
 1114         struct ntvattr *bmvap = NULL;   /* BitMap attribute */
 1115         struct ntvattr *iavap = NULL;   /* IndexAllocation attribute */
 1116         caddr_t         rdbuf;          /* Buffer to read directory's blocks  */
 1117         u_int8_t       *bmp = NULL;     /* Bitmap */
 1118         u_int32_t       blsize;         /* Index allocation size (2048) */
 1119         u_int32_t       rdsize;         /* Length of data to read */
 1120         u_int32_t       attrnum;        /* Current attribute type */
 1121         u_int32_t       cpbl = 1;       /* Clusters per directory block */
 1122         u_int32_t       blnum;
 1123         struct attr_indexentry *iep;
 1124         int             error = ENOENT;
 1125         u_int32_t       aoff, cnum;
 1126 
 1127         dprintf(("ntfs_ntreaddir: read ino: %d, num: %d\n", ip->i_number, num));
 1128         error = ntfs_ntget(ip);
 1129         if (error)
 1130                 return (error);
 1131 
 1132         error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
 1133         if (error)
 1134                 return (ENOTDIR);
 1135 
 1136         if (fp->f_dirblbuf == NULL) {
 1137                 fp->f_dirblsz = vap->va_a_iroot->ir_size;
 1138                 fp->f_dirblbuf = malloc(max(vap->va_datalen,fp->f_dirblsz),
 1139                     M_NTFSDIR, M_WAITOK);
 1140         }
 1141 
 1142         blsize = fp->f_dirblsz;
 1143         rdbuf = fp->f_dirblbuf;
 1144 
 1145         dprintf(("ntfs_ntreaddir: rdbuf: %p, blsize: %d\n", rdbuf, blsize));
 1146 
 1147         if (vap->va_a_iroot->ir_flag & NTFS_IRFLAG_INDXALLOC) {
 1148                 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXBITMAP, "$I30",
 1149                                         0, &bmvap);
 1150                 if (error) {
 1151                         error = ENOTDIR;
 1152                         goto fail;
 1153                 }
 1154                 bmp = malloc(bmvap->va_datalen, M_TEMP, M_WAITOK);
 1155                 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 0,
 1156                                        bmvap->va_datalen, bmp, NULL);
 1157                 if (error)
 1158                         goto fail;
 1159 
 1160                 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDX, "$I30",
 1161                                         0, &iavap);
 1162                 if (error) {
 1163                         error = ENOTDIR;
 1164                         goto fail;
 1165                 }
 1166                 cpbl = ntfs_btocn(blsize + ntfs_cntob(1) - 1);
 1167                 dprintf(("ntfs_ntreaddir: indexalloc: %jd, cpbl: %d\n",
 1168                          iavap->va_datalen, cpbl));
 1169         } else {
 1170                 dprintf(("ntfs_ntreadidir: w/o BitMap and IndexAllocation\n"));
 1171                 iavap = bmvap = NULL;
 1172                 bmp = NULL;
 1173         }
 1174 
 1175         /* Try use previous values */
 1176         if ((fp->f_lastdnum < num) && (fp->f_lastdnum != 0)) {
 1177                 attrnum = fp->f_lastdattr;
 1178                 aoff = fp->f_lastdoff;
 1179                 blnum = fp->f_lastdblnum;
 1180                 cnum = fp->f_lastdnum;
 1181         } else {
 1182                 attrnum = NTFS_A_INDXROOT;
 1183                 aoff = sizeof(struct attr_indexroot);
 1184                 blnum = 0;
 1185                 cnum = 0;
 1186         }
 1187 
 1188         do {
 1189                 dprintf(("ntfs_ntreaddir: scan: 0x%x, %d, %d, %d, %d\n",
 1190                          attrnum, (u_int32_t) blnum, cnum, num, aoff));
 1191                 rdsize = (attrnum == NTFS_A_INDXROOT) ? vap->va_datalen : blsize;
 1192                 error = ntfs_readattr(ntmp, ip, attrnum, "$I30",
 1193                                 ntfs_cntob(blnum * cpbl), rdsize, rdbuf, NULL);
 1194                 if (error)
 1195                         goto fail;
 1196 
 1197                 if (attrnum == NTFS_A_INDX) {
 1198                         error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
 1199                                                 rdbuf, rdsize);
 1200                         if (error)
 1201                                 goto fail;
 1202                 }
 1203                 if (aoff == 0)
 1204                         aoff = (attrnum == NTFS_A_INDX) ?
 1205                                 (0x18 + ((struct attr_indexalloc *) rdbuf)->ia_hdrsize) :
 1206                                 sizeof(struct attr_indexroot);
 1207 
 1208                 iep = (struct attr_indexentry *) (rdbuf + aoff);
 1209                 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
 1210                         aoff += iep->reclen,
 1211                         iep = (struct attr_indexentry *) (rdbuf + aoff))
 1212                 {
 1213                         if (!ntfs_isnamepermitted(ntmp, iep)) continue;
 1214 
 1215                         if (cnum >= num) {
 1216                                 fp->f_lastdnum = cnum;
 1217                                 fp->f_lastdoff = aoff;
 1218                                 fp->f_lastdblnum = blnum;
 1219                                 fp->f_lastdattr = attrnum;
 1220 
 1221                                 *riepp = iep;
 1222 
 1223                                 error = 0;
 1224                                 goto fail;
 1225                         }
 1226                         cnum++;
 1227                 }
 1228 
 1229                 if (iavap) {
 1230                         if (attrnum == NTFS_A_INDXROOT)
 1231                                 blnum = 0;
 1232                         else
 1233                                 blnum++;
 1234 
 1235                         while (ntfs_cntob(blnum * cpbl) < iavap->va_datalen) {
 1236                                 if (bmp[blnum >> 3] & (1 << (blnum & 7)))
 1237                                         break;
 1238                                 blnum++;
 1239                         }
 1240 
 1241                         attrnum = NTFS_A_INDX;
 1242                         aoff = 0;
 1243                         if (ntfs_cntob(blnum * cpbl) >= iavap->va_datalen)
 1244                                 break;
 1245                         dprintf(("ntfs_ntreaddir: blnum: %d\n", (u_int32_t) blnum));
 1246                 }
 1247         } while (iavap);
 1248 
 1249         *riepp = NULL;
 1250         fp->f_lastdnum = 0;
 1251 
 1252 fail:
 1253         if (vap)
 1254                 ntfs_ntvattrrele(vap);
 1255         if (bmvap)
 1256                 ntfs_ntvattrrele(bmvap);
 1257         if (iavap)
 1258                 ntfs_ntvattrrele(iavap);
 1259         if (bmp)
 1260                 free(bmp, M_TEMP);
 1261         ntfs_ntput(ip);
 1262         return (error);
 1263 }
 1264 
 1265 /*
 1266  * Convert NTFS times that are in 100 ns units and begins from
 1267  * 1601 Jan 1 into unix times.
 1268  */
 1269 struct timespec
 1270 ntfs_nttimetounix(
 1271                   u_int64_t nt)
 1272 {
 1273         struct timespec t;
 1274 
 1275         /* WindowNT times are in 100 ns and from 1601 Jan 1 */
 1276         t.tv_nsec = (nt % (1000 * 1000 * 10)) * 100;
 1277         t.tv_sec = nt / (1000 * 1000 * 10) -
 1278                 369LL * 365LL * 24LL * 60LL * 60LL -
 1279                 89LL * 1LL * 24LL * 60LL * 60LL;
 1280         return (t);
 1281 }
 1282 
 1283 /*
 1284  * Get file times from NTFS_A_NAME attribute.
 1285  */
 1286 int
 1287 ntfs_times(
 1288            struct ntfsmount * ntmp,
 1289            struct ntnode * ip,
 1290            ntfs_times_t * tm)
 1291 {
 1292         struct ntvattr *vap;
 1293         int             error;
 1294 
 1295         dprintf(("ntfs_times: ino: %d...\n", ip->i_number));
 1296 
 1297         error = ntfs_ntget(ip);
 1298         if (error)
 1299                 return (error);
 1300 
 1301         error = ntfs_ntvattrget(ntmp, ip, NTFS_A_NAME, NULL, 0, &vap);
 1302         if (error) {
 1303                 ntfs_ntput(ip);
 1304                 return (error);
 1305         }
 1306         *tm = vap->va_a_name->n_times;
 1307         ntfs_ntvattrrele(vap);
 1308         ntfs_ntput(ip);
 1309 
 1310         return (0);
 1311 }
 1312 
 1313 /*
 1314  * Get file sizes from corresponding attribute. 
 1315  * 
 1316  * ntnode under fnode should be locked.
 1317  */
 1318 int
 1319 ntfs_filesize(
 1320               struct ntfsmount * ntmp,
 1321               struct fnode * fp,
 1322               u_int64_t * size,
 1323               u_int64_t * bytes)
 1324 {
 1325         struct ntvattr *vap;
 1326         struct ntnode *ip = FTONT(fp);
 1327         u_int64_t       sz, bn;
 1328         int             error;
 1329 
 1330         dprintf(("ntfs_filesize: ino: %d\n", ip->i_number));
 1331 
 1332         error = ntfs_ntvattrget(ntmp, ip,
 1333                 fp->f_attrtype, fp->f_attrname, 0, &vap);
 1334         if (error)
 1335                 return (error);
 1336 
 1337         bn = vap->va_allocated;
 1338         sz = vap->va_datalen;
 1339 
 1340         dprintf(("ntfs_filesize: %d bytes (%d bytes allocated)\n",
 1341                 (u_int32_t) sz, (u_int32_t) bn));
 1342 
 1343         if (size)
 1344                 *size = sz;
 1345         if (bytes)
 1346                 *bytes = bn;
 1347 
 1348         ntfs_ntvattrrele(vap);
 1349 
 1350         return (0);
 1351 }
 1352 
 1353 /*
 1354  * This is one of write routine.
 1355  */
 1356 int
 1357 ntfs_writeattr_plain(
 1358         struct ntfsmount * ntmp,
 1359         struct ntnode * ip,
 1360         u_int32_t attrnum,      
 1361         char *attrname,
 1362         off_t roff,
 1363         size_t rsize,
 1364         void *rdata,
 1365         size_t * initp,
 1366         struct uio *uio)
 1367 {
 1368         size_t          init;
 1369         int             error = 0;
 1370         off_t           off = roff, left = rsize, towrite;
 1371         caddr_t         data = rdata;
 1372         struct ntvattr *vap;
 1373         *initp = 0;
 1374 
 1375         while (left) {
 1376                 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
 1377                                         ntfs_btocn(off), &vap);
 1378                 if (error)
 1379                         return (error);
 1380                 towrite = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off);
 1381                 ddprintf(("ntfs_writeattr_plain: o: %d, s: %d (%d - %d)\n",
 1382                          (u_int32_t) off, (u_int32_t) towrite,
 1383                          (u_int32_t) vap->va_vcnstart,
 1384                          (u_int32_t) vap->va_vcnend));
 1385                 error = ntfs_writentvattr_plain(ntmp, ip, vap,
 1386                                          off - ntfs_cntob(vap->va_vcnstart),
 1387                                          towrite, data, &init, uio);
 1388                 if (error) {
 1389                         printf("ntfs_writeattr_plain: " \
 1390                                "ntfs_writentvattr_plain failed: o: %d, s: %d\n",
 1391                                (u_int32_t) off, (u_int32_t) towrite);
 1392                         printf("ntfs_writeattr_plain: attrib: %d - %d\n",
 1393                                (u_int32_t) vap->va_vcnstart, 
 1394                                (u_int32_t) vap->va_vcnend);
 1395                         ntfs_ntvattrrele(vap);
 1396                         break;
 1397                 }
 1398                 ntfs_ntvattrrele(vap);
 1399                 left -= towrite;
 1400                 off += towrite;
 1401                 data = data + towrite;
 1402                 *initp += init;
 1403         }
 1404 
 1405         return (error);
 1406 }
 1407 
 1408 /*
 1409  * This is one of write routine.
 1410  *
 1411  * ntnode should be locked.
 1412  */
 1413 int
 1414 ntfs_writentvattr_plain(
 1415         struct ntfsmount * ntmp,
 1416         struct ntnode * ip,
 1417         struct ntvattr * vap,
 1418         off_t roff,
 1419         size_t rsize,
 1420         void *rdata,
 1421         size_t * initp,
 1422         struct uio *uio)
 1423 {
 1424         int             error = 0;
 1425         off_t           off;
 1426         int             cnt;
 1427         cn_t            ccn, ccl, cn, left, cl;
 1428         caddr_t         data = rdata;
 1429         struct buf     *bp;
 1430         size_t          tocopy;
 1431 
 1432         *initp = 0;
 1433 
 1434         if ((vap->va_flag & NTFS_AF_INRUN) == 0) {
 1435                 printf("ntfs_writevattr_plain: CAN'T WRITE RES. ATTRIBUTE\n");
 1436                 return ENOTTY;
 1437         }
 1438 
 1439         ddprintf(("ntfs_writentvattr_plain: data in run: %ld chains\n",
 1440                  vap->va_vruncnt));
 1441 
 1442         off = roff;
 1443         left = rsize;
 1444         ccl = 0;
 1445         ccn = 0;
 1446         cnt = 0;
 1447         for (; left && (cnt < vap->va_vruncnt); cnt++) {
 1448                 ccn = vap->va_vruncn[cnt];
 1449                 ccl = vap->va_vruncl[cnt];
 1450 
 1451                 ddprintf(("ntfs_writentvattr_plain: " \
 1452                          "left %d, cn: 0x%x, cl: %d, off: %d\n", \
 1453                          (u_int32_t) left, (u_int32_t) ccn, \
 1454                          (u_int32_t) ccl, (u_int32_t) off));
 1455 
 1456                 if (ntfs_cntob(ccl) < off) {
 1457                         off -= ntfs_cntob(ccl);
 1458                         cnt++;
 1459                         continue;
 1460                 }
 1461                 if (!ccn && ip->i_number != NTFS_BOOTINO)
 1462                         continue; /* XXX */
 1463 
 1464                 ccl -= ntfs_btocn(off);
 1465                 cn = ccn + ntfs_btocn(off);
 1466                 off = ntfs_btocnoff(off);
 1467 
 1468                 while (left && ccl) {
 1469                         /*
 1470                          * Always read and write single clusters at a time -
 1471                          * we need to avoid requesting differently-sized
 1472                          * blocks at the same disk offsets to avoid
 1473                          * confusing the buffer cache.
 1474                          */
 1475                         tocopy = MIN(left, ntfs_cntob(1) - off);
 1476                         cl = ntfs_btocl(tocopy + off);
 1477                         KASSERT(cl == 1 && tocopy <= ntfs_cntob(1),
 1478                             ("single cluster limit mistake"));
 1479                         ddprintf(("ntfs_writentvattr_plain: write: " \
 1480                                 "cn: 0x%x cl: %d, off: %d len: %d, left: %d\n",
 1481                                 (u_int32_t) cn, (u_int32_t) cl, 
 1482                                 (u_int32_t) off, (u_int32_t) tocopy, 
 1483                                 (u_int32_t) left));
 1484                         if ((off == 0) && (tocopy == ntfs_cntob(cl)))
 1485                         {
 1486                                 bp = getblk(ntmp->ntm_devvp, ntfs_cntobn(cn)
 1487                                             * ntmp->ntm_multiplier,
 1488                                             ntfs_cntob(cl), 0, 0, 0);
 1489                                 clrbuf(bp);
 1490                         } else {
 1491                                 error = bread(ntmp->ntm_devvp, ntfs_cntobn(cn)
 1492                                               * ntmp->ntm_multiplier,
 1493                                               ntfs_cntob(cl), NOCRED, &bp);
 1494                                 if (error) {
 1495                                         brelse(bp);
 1496                                         return (error);
 1497                                 }
 1498                         }
 1499                         if (uio)
 1500                                 uiomove(bp->b_data + off, tocopy, uio);
 1501                         else
 1502                                 memcpy(bp->b_data + off, data, tocopy);
 1503                         bawrite(bp);
 1504                         data = data + tocopy;
 1505                         *initp += tocopy;
 1506                         off = 0;
 1507                         left -= tocopy;
 1508                         cn += cl;
 1509                         ccl -= cl;
 1510                 }
 1511         }
 1512 
 1513         if (left) {
 1514                 printf("ntfs_writentvattr_plain: POSSIBLE RUN ERROR\n");
 1515                 error = EINVAL;
 1516         }
 1517 
 1518         return (error);
 1519 }
 1520 
 1521 /*
 1522  * This is one of read routines.
 1523  *
 1524  * ntnode should be locked.
 1525  */
 1526 int
 1527 ntfs_readntvattr_plain(
 1528         struct ntfsmount * ntmp,
 1529         struct ntnode * ip,
 1530         struct ntvattr * vap,
 1531         off_t roff,
 1532         size_t rsize,
 1533         void *rdata,
 1534         size_t * initp,
 1535         struct uio *uio)
 1536 {
 1537         int             error = 0;
 1538         off_t           off;
 1539 
 1540         *initp = 0;
 1541         if (vap->va_flag & NTFS_AF_INRUN) {
 1542                 int             cnt;
 1543                 cn_t            ccn, ccl, cn, left, cl;
 1544                 caddr_t         data = rdata;
 1545                 struct buf     *bp;
 1546                 size_t          tocopy;
 1547 
 1548                 ddprintf(("ntfs_readntvattr_plain: data in run: %ld chains\n",
 1549                          vap->va_vruncnt));
 1550 
 1551                 off = roff;
 1552                 left = rsize;
 1553                 ccl = 0;
 1554                 ccn = 0;
 1555                 cnt = 0;
 1556                 while (left && (cnt < vap->va_vruncnt)) {
 1557                         ccn = vap->va_vruncn[cnt];
 1558                         ccl = vap->va_vruncl[cnt];
 1559 
 1560                         ddprintf(("ntfs_readntvattr_plain: " \
 1561                                  "left %d, cn: 0x%x, cl: %d, off: %d\n", \
 1562                                  (u_int32_t) left, (u_int32_t) ccn, \
 1563                                  (u_int32_t) ccl, (u_int32_t) off));
 1564 
 1565                         if (ntfs_cntob(ccl) < off) {
 1566                                 off -= ntfs_cntob(ccl);
 1567                                 cnt++;
 1568                                 continue;
 1569                         }
 1570                         if (ccn || ip->i_number == NTFS_BOOTINO) {
 1571                                 ccl -= ntfs_btocn(off);
 1572                                 cn = ccn + ntfs_btocn(off);
 1573                                 off = ntfs_btocnoff(off);
 1574 
 1575                                 while (left && ccl) {
 1576                                         /*
 1577                                          * Always read single clusters at a
 1578                                          * time - we need to avoid reading
 1579                                          * differently-sized blocks at the
 1580                                          * same disk offsets to avoid
 1581                                          * confusing the buffer cache.
 1582                                          */
 1583                                         tocopy = MIN(left,
 1584                                             ntfs_cntob(1) - off);
 1585                                         cl = ntfs_btocl(tocopy + off);
 1586                                         KASSERT(cl == 1 &&
 1587                                             tocopy <= ntfs_cntob(1),
 1588                                             ("single cluster limit mistake"));
 1589 
 1590                                         ddprintf(("ntfs_readntvattr_plain: " \
 1591                                                 "read: cn: 0x%x cl: %d, " \
 1592                                                 "off: %d len: %d, left: %d\n",
 1593                                                 (u_int32_t) cn, 
 1594                                                 (u_int32_t) cl, 
 1595                                                 (u_int32_t) off, 
 1596                                                 (u_int32_t) tocopy, 
 1597                                                 (u_int32_t) left));
 1598                                         error = bread(ntmp->ntm_devvp,
 1599                                                       ntfs_cntobn(cn)
 1600                                                       * ntmp->ntm_multiplier,
 1601                                                       ntfs_cntob(cl),
 1602                                                       NOCRED, &bp);
 1603                                         if (error) {
 1604                                                 brelse(bp);
 1605                                                 return (error);
 1606                                         }
 1607                                         if (uio) {
 1608                                                 uiomove(bp->b_data + off,
 1609                                                         tocopy, uio);
 1610                                         } else {
 1611                                                 memcpy(data, bp->b_data + off,
 1612                                                         tocopy);
 1613                                         }
 1614                                         brelse(bp);
 1615                                         data = data + tocopy;
 1616                                         *initp += tocopy;
 1617                                         off = 0;
 1618                                         left -= tocopy;
 1619                                         cn += cl;
 1620                                         ccl -= cl;
 1621                                 }
 1622                         } else {
 1623                                 tocopy = MIN(left, ntfs_cntob(ccl) - off);
 1624                                 ddprintf(("ntfs_readntvattr_plain: "
 1625                                         "hole: ccn: 0x%x ccl: %d, off: %d, " \
 1626                                         " len: %d, left: %d\n", 
 1627                                         (u_int32_t) ccn, (u_int32_t) ccl, 
 1628                                         (u_int32_t) off, (u_int32_t) tocopy, 
 1629                                         (u_int32_t) left));
 1630                                 left -= tocopy;
 1631                                 off = 0;
 1632                                 if (uio) {
 1633                                         size_t remains = tocopy;
 1634                                         for(; remains; remains--)
 1635                                                 uiomove("", 1, uio);
 1636                                 } else 
 1637                                         bzero(data, tocopy);
 1638                                 data = data + tocopy;
 1639                         }
 1640                         cnt++;
 1641                 }
 1642                 if (left) {
 1643                         printf("ntfs_readntvattr_plain: POSSIBLE RUN ERROR\n");
 1644                         error = E2BIG;
 1645                 }
 1646         } else {
 1647                 ddprintf(("ntfs_readnvattr_plain: data is in mft record\n"));
 1648                 if (uio) 
 1649                         uiomove(vap->va_datap + roff, rsize, uio);
 1650                 else
 1651                         memcpy(rdata, vap->va_datap + roff, rsize);
 1652                 *initp += rsize;
 1653         }
 1654 
 1655         return (error);
 1656 }
 1657 
 1658 /*
 1659  * This is one of read routines.
 1660  */
 1661 int
 1662 ntfs_readattr_plain(
 1663         struct ntfsmount * ntmp,
 1664         struct ntnode * ip,
 1665         u_int32_t attrnum,      
 1666         char *attrname,
 1667         off_t roff,
 1668         size_t rsize,
 1669         void *rdata,
 1670         size_t * initp,
 1671         struct uio *uio)
 1672 {
 1673         size_t          init;
 1674         int             error = 0;
 1675         off_t           off = roff, left = rsize, toread;
 1676         caddr_t         data = rdata;
 1677         struct ntvattr *vap;
 1678         *initp = 0;
 1679 
 1680         while (left) {
 1681                 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
 1682                                         ntfs_btocn(off), &vap);
 1683                 if (error)
 1684                         return (error);
 1685                 toread = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off);
 1686                 ddprintf(("ntfs_readattr_plain: o: %d, s: %d (%d - %d)\n",
 1687                          (u_int32_t) off, (u_int32_t) toread,
 1688                          (u_int32_t) vap->va_vcnstart,
 1689                          (u_int32_t) vap->va_vcnend));
 1690                 error = ntfs_readntvattr_plain(ntmp, ip, vap,
 1691                                          off - ntfs_cntob(vap->va_vcnstart),
 1692                                          toread, data, &init, uio);
 1693                 if (error) {
 1694                         printf("ntfs_readattr_plain: " \
 1695                                "ntfs_readntvattr_plain failed: o: %d, s: %d\n",
 1696                                (u_int32_t) off, (u_int32_t) toread);
 1697                         printf("ntfs_readattr_plain: attrib: %d - %d\n",
 1698                                (u_int32_t) vap->va_vcnstart, 
 1699                                (u_int32_t) vap->va_vcnend);
 1700                         ntfs_ntvattrrele(vap);
 1701                         break;
 1702                 }
 1703                 ntfs_ntvattrrele(vap);
 1704                 left -= toread;
 1705                 off += toread;
 1706                 data = data + toread;
 1707                 *initp += init;
 1708         }
 1709 
 1710         return (error);
 1711 }
 1712 
 1713 /*
 1714  * This is one of read routines.
 1715  */
 1716 int
 1717 ntfs_readattr(
 1718         struct ntfsmount * ntmp,
 1719         struct ntnode * ip,
 1720         u_int32_t attrnum,
 1721         char *attrname,
 1722         off_t roff,
 1723         size_t rsize,
 1724         void *rdata,
 1725         struct uio *uio)
 1726 {
 1727         int             error = 0;
 1728         struct ntvattr *vap;
 1729         size_t          init;
 1730 
 1731         ddprintf(("ntfs_readattr: reading %d: 0x%x, from %d size %d bytes\n",
 1732                ip->i_number, attrnum, (u_int32_t) roff, (u_int32_t) rsize));
 1733 
 1734         error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 0, &vap);
 1735         if (error)
 1736                 return (error);
 1737 
 1738         if ((roff > vap->va_datalen) ||
 1739             (roff + rsize > vap->va_datalen)) {
 1740                 ddprintf(("ntfs_readattr: offset too big\n"));
 1741                 ntfs_ntvattrrele(vap);
 1742                 return (E2BIG);
 1743         }
 1744         if (vap->va_compression && vap->va_compressalg) {
 1745                 u_int8_t       *cup;
 1746                 u_int8_t       *uup;
 1747                 off_t           off = roff, left = rsize, tocopy;
 1748                 caddr_t         data = rdata;
 1749                 cn_t            cn;
 1750 
 1751                 ddprintf(("ntfs_ntreadattr: compression: %d\n",
 1752                          vap->va_compressalg));
 1753 
 1754                 cup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL),
 1755                        M_NTFSDECOMP, M_WAITOK);
 1756                 uup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL),
 1757                        M_NTFSDECOMP, M_WAITOK);
 1758 
 1759                 cn = (ntfs_btocn(roff)) & (~(NTFS_COMPUNIT_CL - 1));
 1760                 off = roff - ntfs_cntob(cn);
 1761 
 1762                 while (left) {
 1763                         error = ntfs_readattr_plain(ntmp, ip, attrnum,
 1764                                                   attrname, ntfs_cntob(cn),
 1765                                                   ntfs_cntob(NTFS_COMPUNIT_CL),
 1766                                                   cup, &init, NULL);
 1767                         if (error)
 1768                                 break;
 1769 
 1770                         tocopy = MIN(left, ntfs_cntob(NTFS_COMPUNIT_CL) - off);
 1771 
 1772                         if (init == ntfs_cntob(NTFS_COMPUNIT_CL)) {
 1773                                 if (uio)
 1774                                         uiomove(cup + off, tocopy, uio);
 1775                                 else
 1776                                         memcpy(data, cup + off, tocopy);
 1777                         } else if (init == 0) {
 1778                                 if (uio) {
 1779                                         size_t remains = tocopy;
 1780                                         for(; remains; remains--)
 1781                                                 uiomove("", 1, uio);
 1782                                 }
 1783                                 else
 1784                                         bzero(data, tocopy);
 1785                         } else {
 1786                                 error = ntfs_uncompunit(ntmp, uup, cup);
 1787                                 if (error)
 1788                                         break;
 1789                                 if (uio)
 1790                                         uiomove(uup + off, tocopy, uio);
 1791                                 else
 1792                                         memcpy(data, uup + off, tocopy);
 1793                         }
 1794 
 1795                         left -= tocopy;
 1796                         data = data + tocopy;
 1797                         off += tocopy - ntfs_cntob(NTFS_COMPUNIT_CL);
 1798                         cn += NTFS_COMPUNIT_CL;
 1799                 }
 1800 
 1801                 free(uup, M_NTFSDECOMP);
 1802                 free(cup, M_NTFSDECOMP);
 1803         } else
 1804                 error = ntfs_readattr_plain(ntmp, ip, attrnum, attrname,
 1805                                              roff, rsize, rdata, &init, uio);
 1806         ntfs_ntvattrrele(vap);
 1807         return (error);
 1808 }
 1809 
 1810 #if 0
 1811 int
 1812 ntfs_parserun(
 1813               cn_t * cn,
 1814               cn_t * cl,
 1815               u_int8_t * run,
 1816               u_long len,
 1817               u_long *off)
 1818 {
 1819         u_int8_t        sz;
 1820         int             i;
 1821 
 1822         if (NULL == run) {
 1823                 printf("ntfs_parsetun: run == NULL\n");
 1824                 return (EINVAL);
 1825         }
 1826         sz = run[(*off)++];
 1827         if (0 == sz) {
 1828                 printf("ntfs_parserun: trying to go out of run\n");
 1829                 return (E2BIG);
 1830         }
 1831         *cl = 0;
 1832         if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
 1833                 printf("ntfs_parserun: " \
 1834                        "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
 1835                        sz, len, *off);
 1836                 return (EINVAL);
 1837         }
 1838         for (i = 0; i < (sz & 0xF); i++)
 1839                 *cl += (u_int32_t) run[(*off)++] << (i << 3);
 1840 
 1841         sz >>= 4;
 1842         if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
 1843                 printf("ntfs_parserun: " \
 1844                        "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
 1845                        sz, len, *off);
 1846                 return (EINVAL);
 1847         }
 1848         for (i = 0; i < (sz & 0xF); i++)
 1849                 *cn += (u_int32_t) run[(*off)++] << (i << 3);
 1850 
 1851         return (0);
 1852 }
 1853 #endif
 1854 
 1855 /*
 1856  * Process fixup routine on given buffer.
 1857  */
 1858 int
 1859 ntfs_procfixups(
 1860                 struct ntfsmount * ntmp,
 1861                 u_int32_t magic,
 1862                 caddr_t buf,
 1863                 size_t len)
 1864 {
 1865         struct fixuphdr *fhp = (struct fixuphdr *) buf;
 1866         int             i;
 1867         u_int16_t       fixup;
 1868         u_int16_t      *fxp;
 1869         u_int16_t      *cfxp;
 1870 
 1871         if (fhp->fh_magic != magic) {
 1872                 printf("ntfs_procfixups: magic doesn't match: %08x != %08x\n",
 1873                        fhp->fh_magic, magic);
 1874                 return (EINVAL);
 1875         }
 1876         if ((fhp->fh_fnum - 1) * NTFS_BLOCK_SIZE != len) {
 1877                 printf("ntfs_procfixups: " \
 1878                        "bad fixups number: %d for %ld bytes block\n", 
 1879                        fhp->fh_fnum, (long)len);        /* XXX printf kludge */
 1880                 return (EINVAL);
 1881         }
 1882         if (fhp->fh_foff >= ntmp->ntm_spc * ntmp->ntm_mftrecsz * ntmp->ntm_bps) {
 1883                 printf("ntfs_procfixups: invalid offset: %x", fhp->fh_foff);
 1884                 return (EINVAL);
 1885         }
 1886         fxp = (u_int16_t *) (buf + fhp->fh_foff);
 1887         cfxp = (u_int16_t *) (buf + NTFS_BLOCK_SIZE - 2);
 1888         fixup = *fxp++;
 1889         for (i = 1; i < fhp->fh_fnum; i++, fxp++) {
 1890                 if (*cfxp != fixup) {
 1891                         printf("ntfs_procfixups: fixup %d doesn't match\n", i);
 1892                         return (EINVAL);
 1893                 }
 1894                 *cfxp = *fxp;
 1895                 cfxp = (u_int16_t *) ((caddr_t) cfxp + NTFS_BLOCK_SIZE);
 1896         }
 1897         return (0);
 1898 }
 1899 
 1900 #if 0
 1901 int
 1902 ntfs_runtocn(
 1903              cn_t * cn, 
 1904              struct ntfsmount * ntmp,
 1905              u_int8_t * run,
 1906              u_long len,
 1907              cn_t vcn)
 1908 {
 1909         cn_t            ccn = 0;
 1910         cn_t            ccl = 0;
 1911         u_long          off = 0;
 1912         int             error = 0;
 1913 
 1914 #if NTFS_DEBUG
 1915         int             i;
 1916         printf("ntfs_runtocn: run: %p, %ld bytes, vcn:%ld\n",
 1917                 run, len, (u_long) vcn);
 1918         printf("ntfs_runtocn: run: ");
 1919         for (i = 0; i < len; i++)
 1920                 printf("0x%02x ", run[i]);
 1921         printf("\n");
 1922 #endif
 1923 
 1924         if (NULL == run) {
 1925                 printf("ntfs_runtocn: run == NULL\n");
 1926                 return (EINVAL);
 1927         }
 1928         do {
 1929                 if (run[off] == 0) {
 1930                         printf("ntfs_runtocn: vcn too big\n");
 1931                         return (E2BIG);
 1932                 }
 1933                 vcn -= ccl;
 1934                 error = ntfs_parserun(&ccn, &ccl, run, len, &off);
 1935                 if (error) {
 1936                         printf("ntfs_runtocn: ntfs_parserun failed\n");
 1937                         return (error);
 1938                 }
 1939         } while (ccl <= vcn);
 1940         *cn = ccn + vcn;
 1941         return (0);
 1942 }
 1943 #endif
 1944 
 1945 /*
 1946  * this initializes toupper table & dependant variables to be ready for
 1947  * later work
 1948  */
 1949 void
 1950 ntfs_toupper_init()
 1951 {
 1952         ntfs_toupper_tab = (wchar *) NULL;
 1953         lockinit(&ntfs_toupper_lock, PVFS, "ntfs_toupper", 0, 0);
 1954         ntfs_toupper_usecount = 0;
 1955 }
 1956 
 1957 void
 1958 ntfs_toupper_destroy(void)
 1959 {
 1960 
 1961         lockdestroy(&ntfs_toupper_lock);
 1962 }
 1963 
 1964 /*
 1965  * if the ntfs_toupper_tab[] is filled already, just raise use count;
 1966  * otherwise read the data from the filesystem we are currently mounting
 1967  */
 1968 int
 1969 ntfs_toupper_use(mp, ntmp)
 1970         struct mount *mp;
 1971         struct ntfsmount *ntmp;
 1972 {
 1973         int error = 0;
 1974         struct vnode *vp;
 1975 
 1976         /* get exclusive access */
 1977         lockmgr(&ntfs_toupper_lock, LK_EXCLUSIVE, NULL);
 1978         
 1979         /* only read the translation data from a file if it hasn't been
 1980          * read already */
 1981         if (ntfs_toupper_tab)
 1982                 goto out;
 1983 
 1984         /*
 1985          * Read in Unicode lowercase -> uppercase translation file.
 1986          * XXX for now, just the first 256 entries are used anyway,
 1987          * so don't bother reading more
 1988          */
 1989         ntfs_toupper_tab = malloc(65536 * sizeof(wchar),
 1990                 M_NTFSRDATA, M_WAITOK);
 1991 
 1992         if ((error = VFS_VGET(mp, NTFS_UPCASEINO, LK_EXCLUSIVE, &vp)))
 1993                 goto out;
 1994         error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
 1995                         0, 65536*sizeof(wchar), (char *) ntfs_toupper_tab, NULL);
 1996         vput(vp);
 1997 
 1998     out:
 1999         ntfs_toupper_usecount++;
 2000         lockmgr(&ntfs_toupper_lock, LK_RELEASE, NULL);
 2001         return (error);
 2002 }
 2003 
 2004 /*
 2005  * lower the use count and if it reaches zero, free the memory
 2006  * tied by toupper table
 2007  */
 2008 void
 2009 ntfs_toupper_unuse()
 2010 {
 2011         /* get exclusive access */
 2012         lockmgr(&ntfs_toupper_lock, LK_EXCLUSIVE, NULL);
 2013 
 2014         ntfs_toupper_usecount--;
 2015         if (ntfs_toupper_usecount == 0) {
 2016                 free(ntfs_toupper_tab, M_NTFSRDATA);
 2017                 ntfs_toupper_tab = NULL;
 2018         }
 2019 #ifdef DIAGNOSTIC
 2020         else if (ntfs_toupper_usecount < 0) {
 2021                 panic("ntfs_toupper_unuse(): use count negative: %d\n",
 2022                         ntfs_toupper_usecount);
 2023         }
 2024 #endif
 2025         
 2026         /* release the lock */
 2027         lockmgr(&ntfs_toupper_lock, LK_RELEASE, NULL);
 2028 } 
 2029 
 2030 int
 2031 ntfs_u28_init(
 2032         struct ntfsmount *ntmp,
 2033         wchar *u2w,
 2034         char *cs_local,
 2035         char *cs_ntfs)
 2036 {
 2037         char ** u28;
 2038         int i, j, h, l;
 2039 
 2040         if (ntfs_iconv && cs_local) {
 2041                 ntfs_iconv->open(cs_local, cs_ntfs, &ntmp->ntm_ic_u2l);
 2042                 return (0);
 2043         }
 2044 
 2045         u28 = malloc(256 * sizeof(char*), M_TEMP, M_WAITOK | M_ZERO);
 2046 
 2047         for (i=0; i<256; i++) {
 2048                 h = (u2w[i] >> 8) & 0xFF;
 2049                 l = (u2w[i]) &0xFF;
 2050 
 2051                 if (u28[h] == NULL) {
 2052                         u28[h] = malloc(256 * sizeof(char), M_TEMP, M_WAITOK);
 2053                         for (j=0; j<256; j++)
 2054                                 u28[h][j] = '_';
 2055                 }
 2056 
 2057                 u28[h][l] = i & 0xFF;
 2058         }
 2059 
 2060         ntmp->ntm_u28 = u28;
 2061 
 2062         return (0);
 2063 }
 2064 
 2065 int
 2066 ntfs_u28_uninit(struct ntfsmount *ntmp)
 2067 {
 2068         char ** u28;
 2069         int i;
 2070 
 2071         if (ntmp->ntm_u28 == NULL) {
 2072                 if (ntfs_iconv && ntmp->ntm_ic_u2l) {
 2073                         ntfs_iconv->close(ntmp->ntm_ic_u2l);
 2074                 }
 2075                 return (0);
 2076         }
 2077 
 2078         u28 = ntmp->ntm_u28;
 2079 
 2080         for (i=0; i<256; i++)
 2081                 if (u28[i] != NULL)
 2082                         free(u28[i], M_TEMP);
 2083 
 2084         free(u28, M_TEMP);
 2085 
 2086         return (0);
 2087 }
 2088 
 2089 int
 2090 ntfs_82u_init(
 2091         struct ntfsmount *ntmp,
 2092         char *cs_local,
 2093         char *cs_ntfs)
 2094 {
 2095         wchar * _82u;
 2096         int i;
 2097 
 2098         if (ntfs_iconv && cs_local) {
 2099                 ntfs_iconv->open(cs_ntfs, cs_local, &ntmp->ntm_ic_l2u);
 2100                 return (0);
 2101         }
 2102 
 2103         _82u = malloc(256 * sizeof(wchar), M_TEMP, M_WAITOK);
 2104 
 2105         for (i=0; i<256; i++)
 2106                         _82u[i] = i;
 2107 
 2108         ntmp->ntm_82u = _82u;
 2109 
 2110         return (0);
 2111 }
 2112 
 2113 int
 2114 ntfs_82u_uninit(struct ntfsmount *ntmp)
 2115 {
 2116 
 2117         if (ntmp->ntm_82u == NULL) {
 2118                 if (ntfs_iconv && ntmp->ntm_ic_l2u) {
 2119                         ntfs_iconv->close(ntmp->ntm_ic_l2u);
 2120                 }
 2121                 return (0);
 2122         }
 2123 
 2124         free(ntmp->ntm_82u, M_TEMP);
 2125         return (0);
 2126 }
 2127 
 2128 /*
 2129  * maps the Unicode char to local character
 2130  */
 2131 char *
 2132 ntfs_u28(
 2133         char *outbuf,
 2134         struct ntfsmount *ntmp, 
 2135         wchar wc)
 2136 {
 2137         char *p, *outp, inbuf[3];
 2138         size_t ilen, olen;
 2139 
 2140         outp = outbuf;
 2141         if (ntfs_iconv && ntmp->ntm_ic_u2l) {
 2142                 ilen = 2;
 2143                 olen = 4;
 2144 
 2145                 inbuf[0] = (char)(wc>>8);
 2146                 inbuf[1] = (char)wc;
 2147                 inbuf[2] = '\0';
 2148                 p = inbuf;
 2149                 ntfs_iconv->convchr(ntmp->ntm_ic_u2l, (const char **)&p, &ilen,
 2150                                     &outp, &olen);
 2151                 if (olen == 4)
 2152                         *outp++ = '?';
 2153                 *outp = '\0';
 2154                 outp = outbuf;
 2155                 return (outp);
 2156         }
 2157 
 2158         p = ntmp->ntm_u28[(wc>>8)&0xFF];
 2159         outbuf[0] = (p == NULL) ? '_' : p[wc&0xFF] & 0xFF;
 2160         outbuf[1] = '\0';
 2161         return (outp);
 2162 }
 2163 
 2164 wchar
 2165 ntfs_82u(
 2166         struct ntfsmount *ntmp, 
 2167         const char *c,
 2168         int *len)
 2169 {
 2170         char *outp, outbuf[3];
 2171         wchar uc;
 2172         size_t ilen, olen;
 2173 
 2174         if (ntfs_iconv && ntmp->ntm_ic_l2u) {
 2175                 ilen = (size_t)*len;
 2176                 olen = 2;
 2177 
 2178                 outp = outbuf;
 2179                 ntfs_iconv->convchr(ntmp->ntm_ic_l2u, &c, &ilen, &outp, &olen);
 2180                 *len -= (int)ilen;
 2181                 uc = (wchar)((outbuf[0]<<8) | (outbuf[1]&0xFF));
 2182 
 2183                 return (uc);
 2184         }
 2185 
 2186         if (ntmp->ntm_82u != NULL)
 2187                 return (ntmp->ntm_82u[*c&0xFF]);
 2188 
 2189         return ('?');
 2190 }
 2191 

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