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


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sys/fs/ntfs/ntfs_subr.c

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    1 /*      $NetBSD: ntfs_subr.c,v 1.23 1999/10/31 19:45:26 jdolecek Exp $  */
    2 
    3 /*-
    4  * Copyright (c) 1998, 1999 Semen Ustimenko (semenu@FreeBSD.org)
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  *
   28  * $FreeBSD$
   29  */
   30 
   31 #include <sys/param.h>
   32 #include <sys/types.h>
   33 #include <sys/systm.h>
   34 #include <sys/namei.h>
   35 #include <sys/kernel.h>
   36 #include <sys/vnode.h>
   37 #include <sys/mount.h>
   38 #include <sys/bio.h>
   39 #include <sys/buf.h>
   40 #include <sys/file.h>
   41 #include <sys/malloc.h>
   42 #include <sys/lock.h>
   43 #include <sys/iconv.h>
   44 
   45 /* #define NTFS_DEBUG 1 */
   46 #include <fs/ntfs/ntfs.h>
   47 #include <fs/ntfs/ntfsmount.h>
   48 #include <fs/ntfs/ntfs_inode.h>
   49 #include <fs/ntfs/ntfs_vfsops.h>
   50 #include <fs/ntfs/ntfs_subr.h>
   51 #include <fs/ntfs/ntfs_compr.h>
   52 #include <fs/ntfs/ntfs_ihash.h>
   53 
   54 MALLOC_DEFINE(M_NTFSNTVATTR, "NTFS vattr", "NTFS file attribute information");
   55 MALLOC_DEFINE(M_NTFSRDATA, "NTFS res data", "NTFS resident data");
   56 MALLOC_DEFINE(M_NTFSRUN, "NTFS vrun", "NTFS vrun storage");
   57 MALLOC_DEFINE(M_NTFSDECOMP, "NTFS decomp", "NTFS decompression temporary");
   58 
   59 static int ntfs_ntlookupattr(struct ntfsmount *, const char *, int, int *, char **);
   60 static int ntfs_findvattr(struct ntfsmount *, struct ntnode *, struct ntvattr **, struct ntvattr **, u_int32_t, const char *, size_t, cn_t);
   61 static int ntfs_uastricmp(struct ntfsmount *, const wchar *, size_t, const char *, size_t);
   62 static int ntfs_uastrcmp(struct ntfsmount *, const wchar *, size_t, const char *, size_t);
   63 
   64 /* table for mapping Unicode chars into uppercase; it's filled upon first
   65  * ntfs mount, freed upon last ntfs umount */
   66 static wchar *ntfs_toupper_tab;
   67 #define NTFS_TOUPPER(ch)        (ntfs_toupper_tab[(ch)])
   68 static struct lock ntfs_toupper_lock;
   69 static signed int ntfs_toupper_usecount;
   70 
   71 struct iconv_functions *ntfs_iconv = NULL;
   72 
   73 /* support macro for ntfs_ntvattrget() */
   74 #define NTFS_AALPCMP(aalp,type,name,namelen) (                          \
   75   (aalp->al_type == type) && (aalp->al_namelen == namelen) &&           \
   76   !NTFS_UASTRCMP(aalp->al_name,aalp->al_namelen,name,namelen) )
   77 
   78 /*
   79  * 
   80  */
   81 int
   82 ntfs_ntvattrrele(vap)
   83         struct ntvattr * vap;
   84 {
   85         dprintf(("ntfs_ntvattrrele: ino: %d, type: 0x%x\n",
   86                  vap->va_ip->i_number, vap->va_type));
   87 
   88         ntfs_ntrele(vap->va_ip);
   89 
   90         return (0);
   91 }
   92 
   93 /*
   94  * find the attribute in the ntnode
   95  */
   96 static int
   97 ntfs_findvattr(ntmp, ip, lvapp, vapp, type, name, namelen, vcn)
   98         struct ntfsmount *ntmp;
   99         struct ntnode *ip;
  100         struct ntvattr **lvapp, **vapp;
  101         u_int32_t type;
  102         const char *name;
  103         size_t namelen;
  104         cn_t vcn;
  105 {
  106         int error;
  107         struct ntvattr *vap;
  108 
  109         if((ip->i_flag & IN_LOADED) == 0) {
  110                 dprintf(("ntfs_findvattr: node not loaded, ino: %d\n",
  111                        ip->i_number));
  112                 error = ntfs_loadntnode(ntmp,ip);
  113                 if (error) {
  114                         printf("ntfs_findvattr: FAILED TO LOAD INO: %d\n",
  115                                ip->i_number);
  116                         return (error);
  117                 }
  118         }
  119 
  120         *lvapp = NULL;
  121         *vapp = NULL;
  122         LIST_FOREACH(vap, &ip->i_valist, va_list) {
  123                 ddprintf(("ntfs_findvattr: type: 0x%x, vcn: %d - %d\n", \
  124                           vap->va_type, (u_int32_t) vap->va_vcnstart, \
  125                           (u_int32_t) vap->va_vcnend));
  126                 if ((vap->va_type == type) &&
  127                     (vap->va_vcnstart <= vcn) && (vap->va_vcnend >= vcn) &&
  128                     (vap->va_namelen == namelen) &&
  129                     (strncmp(name, vap->va_name, namelen) == 0)) {
  130                         *vapp = vap;
  131                         ntfs_ntref(vap->va_ip);
  132                         return (0);
  133                 }
  134                 if (vap->va_type == NTFS_A_ATTRLIST)
  135                         *lvapp = vap;
  136         }
  137 
  138         return (-1);
  139 }
  140 
  141 /*
  142  * Search attribute specifed in ntnode (load ntnode if nessecary).
  143  * If not found but ATTR_A_ATTRLIST present, read it in and search throught.
  144  * VOP_VGET node needed, and lookup througth it's ntnode (load if nessesary).
  145  *
  146  * ntnode should be locked
  147  */
  148 int
  149 ntfs_ntvattrget(
  150                 struct ntfsmount * ntmp,
  151                 struct ntnode * ip,
  152                 u_int32_t type,
  153                 const char *name,
  154                 cn_t vcn,
  155                 struct ntvattr ** vapp)
  156 {
  157         struct ntvattr *lvap = NULL;
  158         struct attr_attrlist *aalp;
  159         struct attr_attrlist *nextaalp;
  160         struct vnode   *newvp;
  161         struct ntnode  *newip;
  162         caddr_t         alpool;
  163         size_t          namelen, len;
  164         int             error;
  165 
  166         *vapp = NULL;
  167 
  168         if (name) {
  169                 dprintf(("ntfs_ntvattrget: " \
  170                          "ino: %d, type: 0x%x, name: %s, vcn: %d\n", \
  171                          ip->i_number, type, name, (u_int32_t) vcn));
  172                 namelen = strlen(name);
  173         } else {
  174                 dprintf(("ntfs_ntvattrget: " \
  175                          "ino: %d, type: 0x%x, vcn: %d\n", \
  176                          ip->i_number, type, (u_int32_t) vcn));
  177                 name = "";
  178                 namelen = 0;
  179         }
  180 
  181         error = ntfs_findvattr(ntmp, ip, &lvap, vapp, type, name, namelen, vcn);
  182         if (error >= 0)
  183                 return (error);
  184 
  185         if (!lvap) {
  186                 dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: " \
  187                        "ino: %d, type: 0x%x, name: %s, vcn: %d\n", \
  188                        ip->i_number, type, name, (u_int32_t) vcn));
  189                 return (ENOENT);
  190         }
  191         /* Scan $ATTRIBUTE_LIST for requested attribute */
  192         len = lvap->va_datalen;
  193         MALLOC(alpool, caddr_t, len, M_TEMP, M_WAITOK);
  194         error = ntfs_readntvattr_plain(ntmp, ip, lvap, 0, len, alpool, &len,
  195                         NULL);
  196         if (error)
  197                 goto out;
  198 
  199         aalp = (struct attr_attrlist *) alpool;
  200         nextaalp = NULL;
  201 
  202         for(; len > 0; aalp = nextaalp) {
  203                 dprintf(("ntfs_ntvattrget: " \
  204                          "attrlist: ino: %d, attr: 0x%x, vcn: %d\n", \
  205                          aalp->al_inumber, aalp->al_type, \
  206                          (u_int32_t) aalp->al_vcnstart));
  207 
  208                 if (len > aalp->reclen) {
  209                         nextaalp = NTFS_NEXTREC(aalp, struct attr_attrlist *);
  210                 } else {
  211                         nextaalp = NULL;
  212                 }
  213                 len -= aalp->reclen;
  214 
  215                 if (!NTFS_AALPCMP(aalp, type, name, namelen) ||
  216                     (nextaalp && (nextaalp->al_vcnstart <= vcn) &&
  217                      NTFS_AALPCMP(nextaalp, type, name, namelen)))
  218                         continue;
  219 
  220                 dprintf(("ntfs_ntvattrget: attribute in ino: %d\n",
  221                                  aalp->al_inumber));
  222 
  223                 /* this is not a main record, so we can't use just plain
  224                    vget() */
  225                 error = ntfs_vgetex(ntmp->ntm_mountp, aalp->al_inumber,
  226                                 NTFS_A_DATA, NULL, LK_EXCLUSIVE,
  227                                 VG_EXT, curthread, &newvp);
  228                 if (error) {
  229                         printf("ntfs_ntvattrget: CAN'T VGET INO: %d\n",
  230                                aalp->al_inumber);
  231                         goto out;
  232                 }
  233                 newip = VTONT(newvp);
  234                 /* XXX have to lock ntnode */
  235                 error = ntfs_findvattr(ntmp, newip, &lvap, vapp,
  236                                 type, name, namelen, vcn);
  237                 vput(newvp);
  238                 if (error == 0)
  239                         goto out;
  240                 printf("ntfs_ntvattrget: ATTRLIST ERROR.\n");
  241                 break;
  242         }
  243         error = ENOENT;
  244 
  245         dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: " \
  246                "ino: %d, type: 0x%x, name: %.*s, vcn: %d\n", \
  247                ip->i_number, type, (int) namelen, name, (u_int32_t) vcn));
  248 out:
  249         FREE(alpool, M_TEMP);
  250         return (error);
  251 }
  252 
  253 /*
  254  * Read ntnode from disk, make ntvattr list.
  255  *
  256  * ntnode should be locked
  257  */
  258 int
  259 ntfs_loadntnode(
  260               struct ntfsmount * ntmp,
  261               struct ntnode * ip)
  262 {
  263         struct filerec  *mfrp;
  264         daddr_t         bn;
  265         int             error,off;
  266         struct attr    *ap;
  267         struct ntvattr *nvap;
  268 
  269         dprintf(("ntfs_loadntnode: loading ino: %d\n",ip->i_number));
  270 
  271         MALLOC(mfrp, struct filerec *, ntfs_bntob(ntmp->ntm_bpmftrec),
  272                M_TEMP, M_WAITOK);
  273 
  274         if (ip->i_number < NTFS_SYSNODESNUM) {
  275                 struct buf     *bp;
  276 
  277                 dprintf(("ntfs_loadntnode: read system node\n"));
  278 
  279                 bn = ntfs_cntobn(ntmp->ntm_mftcn) +
  280                         ntmp->ntm_bpmftrec * ip->i_number;
  281 
  282                 error = bread(ntmp->ntm_devvp,
  283                               bn, ntfs_bntob(ntmp->ntm_bpmftrec),
  284                               NOCRED, &bp);
  285                 if (error) {
  286                         printf("ntfs_loadntnode: BREAD FAILED\n");
  287                         brelse(bp);
  288                         goto out;
  289                 }
  290                 memcpy(mfrp, bp->b_data, ntfs_bntob(ntmp->ntm_bpmftrec));
  291                 bqrelse(bp);
  292         } else {
  293                 struct vnode   *vp;
  294 
  295                 vp = ntmp->ntm_sysvn[NTFS_MFTINO];
  296                 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
  297                                ip->i_number * ntfs_bntob(ntmp->ntm_bpmftrec),
  298                                ntfs_bntob(ntmp->ntm_bpmftrec), mfrp, NULL);
  299                 if (error) {
  300                         printf("ntfs_loadntnode: ntfs_readattr failed\n");
  301                         goto out;
  302                 }
  303         }
  304 
  305         /* Check if magic and fixups are correct */
  306         error = ntfs_procfixups(ntmp, NTFS_FILEMAGIC, (caddr_t)mfrp,
  307                                 ntfs_bntob(ntmp->ntm_bpmftrec));
  308         if (error) {
  309                 printf("ntfs_loadntnode: BAD MFT RECORD %d\n",
  310                        (u_int32_t) ip->i_number);
  311                 goto out;
  312         }
  313 
  314         dprintf(("ntfs_loadntnode: load attrs for ino: %d\n",ip->i_number));
  315         off = mfrp->fr_attroff;
  316         ap = (struct attr *) ((caddr_t)mfrp + off);
  317 
  318         LIST_INIT(&ip->i_valist);
  319         
  320         while (ap->a_hdr.a_type != -1) {
  321                 error = ntfs_attrtontvattr(ntmp, &nvap, ap);
  322                 if (error)
  323                         break;
  324                 nvap->va_ip = ip;
  325 
  326                 LIST_INSERT_HEAD(&ip->i_valist, nvap, va_list);
  327 
  328                 off += ap->a_hdr.reclen;
  329                 ap = (struct attr *) ((caddr_t)mfrp + off);
  330         }
  331         if (error) {
  332                 printf("ntfs_loadntnode: failed to load attr ino: %d\n",
  333                        ip->i_number);
  334                 goto out;
  335         }
  336 
  337         ip->i_mainrec = mfrp->fr_mainrec;
  338         ip->i_nlink = mfrp->fr_nlink;
  339         ip->i_frflag = mfrp->fr_flags;
  340 
  341         ip->i_flag |= IN_LOADED;
  342 
  343 out:
  344         FREE(mfrp, M_TEMP);
  345         return (error);
  346 }
  347                 
  348 /*
  349  * Routine locks ntnode and increase usecount, just opposite of
  350  * ntfs_ntput().
  351  */
  352 int
  353 ntfs_ntget(ip)
  354         struct ntnode *ip;
  355 {
  356         dprintf(("ntfs_ntget: get ntnode %d: %p, usecount: %d\n",
  357                 ip->i_number, ip, ip->i_usecount));
  358 
  359         mtx_lock(&ip->i_interlock);
  360         ip->i_usecount++;
  361         lockmgr(&ip->i_lock, LK_EXCLUSIVE | LK_INTERLOCK, &ip->i_interlock,
  362             NULL);
  363 
  364         return 0;
  365 }
  366 
  367 /*
  368  * Routine search ntnode in hash, if found: lock, inc usecount and return.
  369  * If not in hash allocate structure for ntnode, prefill it, lock,
  370  * inc count and return.
  371  *
  372  * ntnode returned locked
  373  */
  374 int
  375 ntfs_ntlookup(
  376            struct ntfsmount * ntmp,
  377            ino_t ino,
  378            struct ntnode ** ipp)
  379 {
  380         struct ntnode  *ip;
  381 
  382         dprintf(("ntfs_ntlookup: looking for ntnode %d\n", ino));
  383 
  384         do {
  385                 if ((ip = ntfs_nthashlookup(ntmp->ntm_dev, ino)) != NULL) {
  386                         ntfs_ntget(ip);
  387                         dprintf(("ntfs_ntlookup: ntnode %d: %p, usecount: %d\n",
  388                                 ino, ip, ip->i_usecount));
  389                         *ipp = ip;
  390                         return (0);
  391                 }
  392         } while (lockmgr(&ntfs_hashlock, LK_EXCLUSIVE | LK_SLEEPFAIL, NULL,
  393             NULL));
  394 
  395         MALLOC(ip, struct ntnode *, 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_dev;
  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, LK_EXCLUSIVE);
  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, 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                     NULL);
  453                 return;
  454         }
  455 
  456         dprintf(("ntfs_ntput: deallocating ntnode: %d\n", ip->i_number));
  457 
  458         if (LIST_FIRST(&ip->i_fnlist))
  459                 panic("ntfs_ntput: ntnode has fnodes\n");
  460 
  461         ntfs_nthashrem(ip);
  462 
  463         while ((vap = LIST_FIRST(&ip->i_valist)) != NULL) {
  464                 LIST_REMOVE(vap,va_list);
  465                 ntfs_freentvattr(vap);
  466         }
  467         mtx_unlock(&ip->i_interlock);
  468         mtx_destroy(&ip->i_interlock);
  469         lockdestroy(&ip->i_lock);
  470         vrele(ip->i_devvp);
  471         FREE(ip, M_NTFSNTNODE);
  472 }
  473 
  474 /*
  475  * increment usecount of ntnode 
  476  */
  477 void
  478 ntfs_ntref(ip)
  479         struct ntnode *ip;
  480 {
  481         mtx_lock(&ip->i_interlock);
  482         ip->i_usecount++;
  483         mtx_unlock(&ip->i_interlock);
  484 
  485         dprintf(("ntfs_ntref: ino %d, usecount: %d\n",
  486                 ip->i_number, ip->i_usecount));
  487                         
  488 }
  489 
  490 /*
  491  * Decrement usecount of ntnode.
  492  */
  493 void
  494 ntfs_ntrele(ip)
  495         struct ntnode *ip;
  496 {
  497         dprintf(("ntfs_ntrele: rele ntnode %d: %p, usecount: %d\n",
  498                 ip->i_number, ip, ip->i_usecount));
  499 
  500         mtx_lock(&ip->i_interlock);
  501         ip->i_usecount--;
  502 
  503         if (ip->i_usecount < 0)
  504                 panic("ntfs_ntrele: ino: %d usecount: %d \n",
  505                       ip->i_number,ip->i_usecount);
  506         mtx_unlock(&ip->i_interlock);
  507 }
  508 
  509 /*
  510  * Deallocate all memory allocated for ntvattr
  511  */
  512 void
  513 ntfs_freentvattr(vap)
  514         struct ntvattr * vap;
  515 {
  516         if (vap->va_flag & NTFS_AF_INRUN) {
  517                 if (vap->va_vruncn)
  518                         FREE(vap->va_vruncn, M_NTFSRUN);
  519                 if (vap->va_vruncl)
  520                         FREE(vap->va_vruncl, M_NTFSRUN);
  521         } else {
  522                 if (vap->va_datap)
  523                         FREE(vap->va_datap, M_NTFSRDATA);
  524         }
  525         FREE(vap, M_NTFSNTVATTR);
  526 }
  527 
  528 /*
  529  * Convert disk image of attribute into ntvattr structure,
  530  * runs are expanded also.
  531  */
  532 int
  533 ntfs_attrtontvattr(
  534                    struct ntfsmount * ntmp,
  535                    struct ntvattr ** rvapp,
  536                    struct attr * rap)
  537 {
  538         int             error, i;
  539         struct ntvattr *vap;
  540 
  541         error = 0;
  542         *rvapp = NULL;
  543 
  544         MALLOC(vap, struct ntvattr *, sizeof(struct ntvattr),
  545                 M_NTFSNTVATTR, M_WAITOK | M_ZERO);
  546         vap->va_ip = NULL;
  547         vap->va_flag = rap->a_hdr.a_flag;
  548         vap->va_type = rap->a_hdr.a_type;
  549         vap->va_compression = rap->a_hdr.a_compression;
  550         vap->va_index = rap->a_hdr.a_index;
  551 
  552         ddprintf(("type: 0x%x, index: %d", vap->va_type, vap->va_index));
  553 
  554         vap->va_namelen = rap->a_hdr.a_namelen;
  555         if (rap->a_hdr.a_namelen) {
  556                 wchar *unp = (wchar *) ((caddr_t) rap + rap->a_hdr.a_nameoff);
  557                 ddprintf((", name:["));
  558                 for (i = 0; i < vap->va_namelen; i++) {
  559                         vap->va_name[i] = unp[i];
  560                         ddprintf(("%c", vap->va_name[i]));
  561                 }
  562                 ddprintf(("]"));
  563         }
  564         if (vap->va_flag & NTFS_AF_INRUN) {
  565                 ddprintf((", nonres."));
  566                 vap->va_datalen = rap->a_nr.a_datalen;
  567                 vap->va_allocated = rap->a_nr.a_allocated;
  568                 vap->va_vcnstart = rap->a_nr.a_vcnstart;
  569                 vap->va_vcnend = rap->a_nr.a_vcnend;
  570                 vap->va_compressalg = rap->a_nr.a_compressalg;
  571                 error = ntfs_runtovrun(&(vap->va_vruncn), &(vap->va_vruncl),
  572                                        &(vap->va_vruncnt),
  573                                        (caddr_t) rap + rap->a_nr.a_dataoff);
  574         } else {
  575                 vap->va_compressalg = 0;
  576                 ddprintf((", res."));
  577                 vap->va_datalen = rap->a_r.a_datalen;
  578                 vap->va_allocated = rap->a_r.a_datalen;
  579                 vap->va_vcnstart = 0;
  580                 vap->va_vcnend = ntfs_btocn(vap->va_allocated);
  581                 MALLOC(vap->va_datap, caddr_t, vap->va_datalen,
  582                        M_NTFSRDATA, M_WAITOK);
  583                 memcpy(vap->va_datap, (caddr_t) rap + rap->a_r.a_dataoff,
  584                        rap->a_r.a_datalen);
  585         }
  586         ddprintf((", len: %d", vap->va_datalen));
  587 
  588         if (error)
  589                 FREE(vap, M_NTFSNTVATTR);
  590         else
  591                 *rvapp = vap;
  592 
  593         ddprintf(("\n"));
  594 
  595         return (error);
  596 }
  597 
  598 /*
  599  * Expand run into more utilizable and more memory eating format.
  600  */
  601 int
  602 ntfs_runtovrun(
  603                cn_t ** rcnp,
  604                cn_t ** rclp,
  605                u_long * rcntp,
  606                u_int8_t * run)
  607 {
  608         u_int32_t       off;
  609         u_int32_t       sz, i;
  610         cn_t           *cn;
  611         cn_t           *cl;
  612         u_long          cnt;
  613         cn_t            prev;
  614         cn_t            tmp;
  615 
  616         off = 0;
  617         cnt = 0;
  618         i = 0;
  619         while (run[off]) {
  620                 off += (run[off] & 0xF) + ((run[off] >> 4) & 0xF) + 1;
  621                 cnt++;
  622         }
  623         MALLOC(cn, cn_t *, cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
  624         MALLOC(cl, cn_t *, cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
  625 
  626         off = 0;
  627         cnt = 0;
  628         prev = 0;
  629         while (run[off]) {
  630 
  631                 sz = run[off++];
  632                 cl[cnt] = 0;
  633 
  634                 for (i = 0; i < (sz & 0xF); i++)
  635                         cl[cnt] += (u_int32_t) run[off++] << (i << 3);
  636 
  637                 sz >>= 4;
  638                 if (run[off + sz - 1] & 0x80) {
  639                         tmp = ((u_int64_t) - 1) << (sz << 3);
  640                         for (i = 0; i < sz; i++)
  641                                 tmp |= (u_int64_t) run[off++] << (i << 3);
  642                 } else {
  643                         tmp = 0;
  644                         for (i = 0; i < sz; i++)
  645                                 tmp |= (u_int64_t) run[off++] << (i << 3);
  646                 }
  647                 if (tmp)
  648                         prev = cn[cnt] = prev + tmp;
  649                 else
  650                         cn[cnt] = tmp;
  651 
  652                 cnt++;
  653         }
  654         *rcnp = cn;
  655         *rclp = cl;
  656         *rcntp = cnt;
  657         return (0);
  658 }
  659 
  660 /*
  661  * Compare unicode and ascii string case insens.
  662  */
  663 static int
  664 ntfs_uastricmp(ntmp, ustr, ustrlen, astr, astrlen)
  665         struct ntfsmount *ntmp;
  666         const wchar *ustr;
  667         size_t ustrlen;
  668         const char *astr;
  669         size_t astrlen;
  670 {
  671         int len;
  672         size_t i, j, mbstrlen = astrlen;
  673         int res;
  674         wchar wc;
  675 
  676         if (ntmp->ntm_ic_l2u) {
  677                 for (i = 0, j = 0; i < ustrlen && j < astrlen; i++, j++) {
  678                         if (j < astrlen -1) {
  679                                 wc = (wchar)astr[j]<<8 | (astr[j+1]&0xFF);
  680                                 len = 2;
  681                         } else {
  682                                 wc = (wchar)astr[j]<<8 & 0xFF00;
  683                                 len = 1;
  684                         }
  685                         res = ((int) NTFS_TOUPPER(ustr[i])) -
  686                                 ((int)NTFS_TOUPPER(NTFS_82U(wc, &len)));
  687                         j += len - 1;
  688                         mbstrlen -= len - 1;
  689 
  690                         if (res)
  691                                 return res;
  692                 }
  693         } else {
  694                 /*
  695                  * We use NTFS_82U(NTFS_U28(c)) to get rid of unicode
  696                  * symbols not covered by translation table
  697                  */
  698                 for (i = 0; i < ustrlen && i < astrlen; i++) {
  699                         res = ((int) NTFS_TOUPPER(NTFS_82U(NTFS_U28(ustr[i]), &len))) -
  700                                 ((int)NTFS_TOUPPER(NTFS_82U((wchar)astr[i], &len)));
  701                         if (res)
  702                                 return res;
  703                 }
  704         }
  705         return (ustrlen - mbstrlen);
  706 }
  707 
  708 /*
  709  * Compare unicode and ascii string case sens.
  710  */
  711 static int
  712 ntfs_uastrcmp(ntmp, ustr, ustrlen, astr, astrlen)
  713         struct ntfsmount *ntmp;
  714         const wchar *ustr;
  715         size_t ustrlen;
  716         const char *astr;
  717         size_t astrlen;
  718 {
  719         char u, l;
  720         size_t i, j, mbstrlen = astrlen;
  721         int res;
  722         wchar wc;
  723 
  724         for (i = 0, j = 0; (i < ustrlen) && (j < astrlen); i++, j++) {
  725                 res = 0;
  726                 wc = NTFS_U28(ustr[i]);
  727                 u = (char)(wc>>8);
  728                 l = (char)wc;
  729                 if (u != '\0' && j < astrlen -1) {
  730                         res = (int) (u - astr[j++]);
  731                         mbstrlen--;
  732                 }
  733                 res = (res<<8) + (int) (l - astr[j]);
  734                 if (res)
  735                         return res;
  736         }
  737         return (ustrlen - mbstrlen);
  738 }
  739 
  740 /* 
  741  * Search fnode in ntnode, if not found allocate and preinitialize.
  742  *
  743  * ntnode should be locked on entry.
  744  */
  745 int
  746 ntfs_fget(
  747         struct ntfsmount *ntmp,
  748         struct ntnode *ip,
  749         int attrtype,
  750         char *attrname,
  751         struct fnode **fpp)
  752 {
  753         struct fnode *fp;
  754 
  755         dprintf(("ntfs_fget: ino: %d, attrtype: 0x%x, attrname: %s\n",
  756                 ip->i_number,attrtype, attrname?attrname:""));
  757         *fpp = NULL;
  758         LIST_FOREACH(fp, &ip->i_fnlist, f_fnlist){
  759                 dprintf(("ntfs_fget: fnode: attrtype: %d, attrname: %s\n",
  760                         fp->f_attrtype, fp->f_attrname?fp->f_attrname:""));
  761 
  762                 if ((attrtype == fp->f_attrtype) && 
  763                     ((!attrname && !fp->f_attrname) ||
  764                      (attrname && fp->f_attrname &&
  765                       !strcmp(attrname,fp->f_attrname)))){
  766                         dprintf(("ntfs_fget: found existed: %p\n",fp));
  767                         *fpp = fp;
  768                 }
  769         }
  770 
  771         if (*fpp)
  772                 return (0);
  773 
  774         MALLOC(fp, struct fnode *, sizeof(struct fnode), M_NTFSFNODE,
  775                 M_WAITOK | M_ZERO);
  776         dprintf(("ntfs_fget: allocating fnode: %p\n",fp));
  777 
  778         fp->f_ip = ip;
  779         if (attrname) {
  780                 fp->f_flag |= FN_AATTRNAME;
  781                 MALLOC(fp->f_attrname, char *, strlen(attrname)+1, M_TEMP, M_WAITOK);
  782                 strcpy(fp->f_attrname, attrname);
  783         } else
  784                 fp->f_attrname = NULL;
  785         fp->f_attrtype = attrtype;
  786 
  787         ntfs_ntref(ip);
  788 
  789         LIST_INSERT_HEAD(&ip->i_fnlist, fp, f_fnlist);
  790 
  791         *fpp = fp;
  792 
  793         return (0);
  794 }
  795 
  796 /*
  797  * Deallocate fnode, remove it from ntnode's fnode list.
  798  *
  799  * ntnode should be locked.
  800  */
  801 void
  802 ntfs_frele(
  803         struct fnode *fp)
  804 {
  805         struct ntnode *ip = FTONT(fp);
  806 
  807         dprintf(("ntfs_frele: fnode: %p for %d: %p\n", fp, ip->i_number, ip));
  808 
  809         dprintf(("ntfs_frele: deallocating fnode\n"));
  810         LIST_REMOVE(fp,f_fnlist);
  811         if (fp->f_flag & FN_AATTRNAME)
  812                 FREE(fp->f_attrname, M_TEMP);
  813         if (fp->f_dirblbuf)
  814                 FREE(fp->f_dirblbuf, M_NTFSDIR);
  815         FREE(fp, M_NTFSFNODE);
  816         ntfs_ntrele(ip);
  817 }
  818 
  819 /*
  820  * Lookup attribute name in format: [[:$ATTR_TYPE]:$ATTR_NAME], 
  821  * $ATTR_TYPE is searched in attrdefs read from $AttrDefs.
  822  * If $ATTR_TYPE nott specifed, ATTR_A_DATA assumed.
  823  */
  824 static int
  825 ntfs_ntlookupattr(
  826                 struct ntfsmount * ntmp,
  827                 const char * name,
  828                 int namelen,
  829                 int *attrtype,
  830                 char **attrname)
  831 {
  832         const char *sys;
  833         size_t syslen, i;
  834         struct ntvattrdef *adp;
  835 
  836         if (namelen == 0)
  837                 return (0);
  838 
  839         if (name[0] == '$') {
  840                 sys = name;
  841                 for (syslen = 0; syslen < namelen; syslen++) {
  842                         if(sys[syslen] == ':') {
  843                                 name++;
  844                                 namelen--;
  845                                 break;
  846                         }
  847                 }
  848                 name += syslen;
  849                 namelen -= syslen;
  850 
  851                 adp = ntmp->ntm_ad;
  852                 for (i = 0; i < ntmp->ntm_adnum; i++, adp++){
  853                         if (syslen != adp->ad_namelen || 
  854                            strncmp(sys, adp->ad_name, syslen) != 0)
  855                                 continue;
  856 
  857                         *attrtype = adp->ad_type;
  858                         goto out;
  859                 }
  860                 return (ENOENT);
  861         } else
  862                 *attrtype = NTFS_A_DATA;
  863 
  864     out:
  865         if (namelen) {
  866                 MALLOC((*attrname), char *, namelen, M_TEMP, M_WAITOK);
  867                 memcpy((*attrname), name, namelen);
  868                 (*attrname)[namelen] = '\0';
  869         }
  870 
  871         return (0);
  872 }
  873 
  874 /*
  875  * Lookup specifed node for filename, matching cnp,
  876  * return fnode filled.
  877  */
  878 int
  879 ntfs_ntlookupfile(
  880               struct ntfsmount * ntmp,
  881               struct vnode * vp,
  882               struct componentname * cnp,
  883               struct vnode ** vpp)
  884 {
  885         struct fnode   *fp = VTOF(vp);
  886         struct ntnode  *ip = FTONT(fp);
  887         struct ntvattr *vap;    /* Root attribute */
  888         cn_t            cn;     /* VCN in current attribute */
  889         caddr_t         rdbuf;  /* Buffer to read directory's blocks  */
  890         u_int32_t       blsize;
  891         u_int32_t       rdsize; /* Length of data to read from current block */
  892         struct attr_indexentry *iep;
  893         int             error, res, anamelen, fnamelen;
  894         const char     *fname,*aname;
  895         u_int32_t       aoff;
  896         int attrtype = NTFS_A_DATA;
  897         char *attrname = NULL;
  898         struct fnode   *nfp;
  899         struct vnode   *nvp;
  900         enum vtype      f_type;
  901 
  902         error = ntfs_ntget(ip);
  903         if (error)
  904                 return (error);
  905 
  906         error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
  907         if (error || (vap->va_flag & NTFS_AF_INRUN))
  908                 return (ENOTDIR);
  909 
  910         blsize = vap->va_a_iroot->ir_size;
  911         rdsize = vap->va_datalen;
  912 
  913         /*
  914          * Divide file name into: foofilefoofilefoofile[:attrspec]
  915          * Store like this:       fname:fnamelen       [aname:anamelen]
  916          */
  917         fname = cnp->cn_nameptr;
  918         aname = NULL;
  919         anamelen = 0;
  920         for (fnamelen = 0; fnamelen < cnp->cn_namelen; fnamelen++)
  921                 if(fname[fnamelen] == ':') {
  922                         aname = fname + fnamelen + 1;
  923                         anamelen = cnp->cn_namelen - fnamelen - 1;
  924                         dprintf(("ntfs_ntlookupfile: %s (%d), attr: %s (%d)\n",
  925                                 fname, fnamelen, aname, anamelen));
  926                         break;
  927                 }
  928 
  929         dprintf(("ntfs_ntlookupfile: blksz: %d, rdsz: %d\n", blsize, rdsize));
  930 
  931         MALLOC(rdbuf, caddr_t, blsize, M_TEMP, M_WAITOK);
  932 
  933         error = ntfs_readattr(ntmp, ip, NTFS_A_INDXROOT, "$I30",
  934                                0, rdsize, rdbuf, NULL);
  935         if (error)
  936                 goto fail;
  937 
  938         aoff = sizeof(struct attr_indexroot);
  939 
  940         do {
  941                 iep = (struct attr_indexentry *) (rdbuf + aoff);
  942 
  943                 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
  944                         aoff += iep->reclen,
  945                         iep = (struct attr_indexentry *) (rdbuf + aoff))
  946                 {
  947                         ddprintf(("scan: %d, %d\n",
  948                                   (u_int32_t) iep->ie_number,
  949                                   (u_int32_t) iep->ie_fnametype));
  950 
  951                         /* check the name - the case-insensitible check
  952                          * has to come first, to break from this for loop
  953                          * if needed, so we can dive correctly */
  954                         res = NTFS_UASTRICMP(iep->ie_fname, iep->ie_fnamelen,
  955                                 fname, fnamelen);
  956                         if (res > 0) break;
  957                         if (res < 0) continue;
  958 
  959                         if (iep->ie_fnametype == 0 ||
  960                             !(ntmp->ntm_flag & NTFS_MFLAG_CASEINS))
  961                         {
  962                                 res = NTFS_UASTRCMP(iep->ie_fname,
  963                                         iep->ie_fnamelen, fname, fnamelen);
  964                                 if (res != 0) continue;
  965                         }
  966 
  967                         if (aname) {
  968                                 error = ntfs_ntlookupattr(ntmp,
  969                                         aname, anamelen,
  970                                         &attrtype, &attrname);
  971                                 if (error)
  972                                         goto fail;
  973                         }
  974 
  975                         /* Check if we've found ourself */
  976                         if ((iep->ie_number == ip->i_number) &&
  977                             (attrtype == fp->f_attrtype) &&
  978                             ((!attrname && !fp->f_attrname) ||
  979                              (attrname && fp->f_attrname &&
  980                               !strcmp(attrname, fp->f_attrname))))
  981                         {
  982                                 VREF(vp);
  983                                 *vpp = vp;
  984                                 error = 0;
  985                                 goto fail;
  986                         }
  987 
  988                         /* vget node, but don't load it */
  989                         error = ntfs_vgetex(ntmp->ntm_mountp,
  990                                    iep->ie_number, attrtype, attrname,
  991                                    LK_EXCLUSIVE, VG_DONTLOADIN | VG_DONTVALIDFN,
  992                                    curthread, &nvp);
  993 
  994                         /* free the buffer returned by ntfs_ntlookupattr() */
  995                         if (attrname) {
  996                                 FREE(attrname, M_TEMP);
  997                                 attrname = NULL;
  998                         }
  999 
 1000                         if (error)
 1001                                 goto fail;
 1002 
 1003                         nfp = VTOF(nvp);
 1004 
 1005                         if (nfp->f_flag & FN_VALID) {
 1006                                 *vpp = nvp;
 1007                                 goto fail;
 1008                         }
 1009 
 1010                         nfp->f_fflag = iep->ie_fflag;
 1011                         nfp->f_pnumber = iep->ie_fpnumber;
 1012                         nfp->f_times = iep->ie_ftimes;
 1013 
 1014                         if((nfp->f_fflag & NTFS_FFLAG_DIR) &&
 1015                            (nfp->f_attrtype == NTFS_A_DATA) &&
 1016                            (nfp->f_attrname == NULL))
 1017                                 f_type = VDIR;  
 1018                         else
 1019                                 f_type = VREG;  
 1020 
 1021                         nvp->v_type = f_type;
 1022 
 1023                         if ((nfp->f_attrtype == NTFS_A_DATA) &&
 1024                             (nfp->f_attrname == NULL))
 1025                         {
 1026                                 /* Opening default attribute */
 1027                                 nfp->f_size = iep->ie_fsize;
 1028                                 nfp->f_allocated = iep->ie_fallocated;
 1029                                 nfp->f_flag |= FN_PRELOADED;
 1030                         } else {
 1031                                 error = ntfs_filesize(ntmp, nfp,
 1032                                             &nfp->f_size, &nfp->f_allocated);
 1033                                 if (error) {
 1034                                         vput(nvp);
 1035                                         goto fail;
 1036                                 }
 1037                         }
 1038 
 1039                         nfp->f_flag &= ~FN_VALID;
 1040                         *vpp = nvp;
 1041                         goto fail;
 1042                 }
 1043 
 1044                 /* Dive if possible */
 1045                 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) {
 1046                         dprintf(("ntfs_ntlookupfile: diving\n"));
 1047 
 1048                         cn = *(cn_t *) (rdbuf + aoff +
 1049                                         iep->reclen - sizeof(cn_t));
 1050                         rdsize = blsize;
 1051 
 1052                         error = ntfs_readattr(ntmp, ip, NTFS_A_INDX, "$I30",
 1053                                         ntfs_cntob(cn), rdsize, rdbuf, NULL);
 1054                         if (error)
 1055                                 goto fail;
 1056 
 1057                         error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
 1058                                                 rdbuf, rdsize);
 1059                         if (error)
 1060                                 goto fail;
 1061 
 1062                         aoff = (((struct attr_indexalloc *) rdbuf)->ia_hdrsize +
 1063                                 0x18);
 1064                 } else {
 1065                         dprintf(("ntfs_ntlookupfile: nowhere to dive :-(\n"));
 1066                         error = ENOENT;
 1067                         break;
 1068                 }
 1069         } while (1);
 1070 
 1071         dprintf(("finish\n"));
 1072 
 1073 fail:
 1074         if (attrname) FREE(attrname, M_TEMP);
 1075         ntfs_ntvattrrele(vap);
 1076         ntfs_ntput(ip);
 1077         FREE(rdbuf, M_TEMP);
 1078         return (error);
 1079 }
 1080 
 1081 /*
 1082  * Check if name type is permitted to show.
 1083  */
 1084 int
 1085 ntfs_isnamepermitted(
 1086                      struct ntfsmount * ntmp,
 1087                      struct attr_indexentry * iep)
 1088 {
 1089         if (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)
 1090                 return 1;
 1091 
 1092         switch (iep->ie_fnametype) {
 1093         case 2:
 1094                 ddprintf(("ntfs_isnamepermitted: skiped DOS name\n"));
 1095                 return 0;
 1096         case 0: case 1: case 3:
 1097                 return 1;
 1098         default:
 1099                 printf("ntfs_isnamepermitted: " \
 1100                        "WARNING! Unknown file name type: %d\n",
 1101                        iep->ie_fnametype);
 1102                 break;
 1103         }
 1104         return 0;
 1105 }
 1106 
 1107 /*
 1108  * Read ntfs dir like stream of attr_indexentry, not like btree of them.
 1109  * This is done by scaning $BITMAP:$I30 for busy clusters and reading them.
 1110  * Ofcouse $INDEX_ROOT:$I30 is read before. Last read values are stored in
 1111  * fnode, so we can skip toward record number num almost immediatly.
 1112  * Anyway this is rather slow routine. The problem is that we don't know
 1113  * how many records are there in $INDEX_ALLOCATION:$I30 block.
 1114  */
 1115 int
 1116 ntfs_ntreaddir(
 1117                struct ntfsmount * ntmp,
 1118                struct fnode * fp,
 1119                u_int32_t num,
 1120                struct attr_indexentry ** riepp)
 1121 {
 1122         struct ntnode  *ip = FTONT(fp);
 1123         struct ntvattr *vap = NULL;     /* IndexRoot attribute */
 1124         struct ntvattr *bmvap = NULL;   /* BitMap attribute */
 1125         struct ntvattr *iavap = NULL;   /* IndexAllocation attribute */
 1126         caddr_t         rdbuf;          /* Buffer to read directory's blocks  */
 1127         u_char         *bmp = NULL;     /* Bitmap */
 1128         u_int32_t       blsize;         /* Index allocation size (2048) */
 1129         u_int32_t       rdsize;         /* Length of data to read */
 1130         u_int32_t       attrnum;        /* Current attribute type */
 1131         u_int32_t       cpbl = 1;       /* Clusters per directory block */
 1132         u_int32_t       blnum;
 1133         struct attr_indexentry *iep;
 1134         int             error = ENOENT;
 1135         u_int32_t       aoff, cnum;
 1136 
 1137         dprintf(("ntfs_ntreaddir: read ino: %d, num: %d\n", ip->i_number, num));
 1138         error = ntfs_ntget(ip);
 1139         if (error)
 1140                 return (error);
 1141 
 1142         error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
 1143         if (error)
 1144                 return (ENOTDIR);
 1145 
 1146         if (fp->f_dirblbuf == NULL) {
 1147                 fp->f_dirblsz = vap->va_a_iroot->ir_size;
 1148                 MALLOC(fp->f_dirblbuf, caddr_t,
 1149                        max(vap->va_datalen,fp->f_dirblsz), M_NTFSDIR, M_WAITOK);
 1150         }
 1151 
 1152         blsize = fp->f_dirblsz;
 1153         rdbuf = fp->f_dirblbuf;
 1154 
 1155         dprintf(("ntfs_ntreaddir: rdbuf: 0x%p, blsize: %d\n", rdbuf, blsize));
 1156 
 1157         if (vap->va_a_iroot->ir_flag & NTFS_IRFLAG_INDXALLOC) {
 1158                 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXBITMAP, "$I30",
 1159                                         0, &bmvap);
 1160                 if (error) {
 1161                         error = ENOTDIR;
 1162                         goto fail;
 1163                 }
 1164                 MALLOC(bmp, u_char *, bmvap->va_datalen, M_TEMP, M_WAITOK);
 1165                 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 0,
 1166                                        bmvap->va_datalen, bmp, NULL);
 1167                 if (error)
 1168                         goto fail;
 1169 
 1170                 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDX, "$I30",
 1171                                         0, &iavap);
 1172                 if (error) {
 1173                         error = ENOTDIR;
 1174                         goto fail;
 1175                 }
 1176                 cpbl = ntfs_btocn(blsize + ntfs_cntob(1) - 1);
 1177                 dprintf(("ntfs_ntreaddir: indexalloc: %d, cpbl: %d\n",
 1178                          iavap->va_datalen, cpbl));
 1179         } else {
 1180                 dprintf(("ntfs_ntreadidir: w/o BitMap and IndexAllocation\n"));
 1181                 iavap = bmvap = NULL;
 1182                 bmp = NULL;
 1183         }
 1184 
 1185         /* Try use previous values */
 1186         if ((fp->f_lastdnum < num) && (fp->f_lastdnum != 0)) {
 1187                 attrnum = fp->f_lastdattr;
 1188                 aoff = fp->f_lastdoff;
 1189                 blnum = fp->f_lastdblnum;
 1190                 cnum = fp->f_lastdnum;
 1191         } else {
 1192                 attrnum = NTFS_A_INDXROOT;
 1193                 aoff = sizeof(struct attr_indexroot);
 1194                 blnum = 0;
 1195                 cnum = 0;
 1196         }
 1197 
 1198         do {
 1199                 dprintf(("ntfs_ntreaddir: scan: 0x%x, %d, %d, %d, %d\n",
 1200                          attrnum, (u_int32_t) blnum, cnum, num, aoff));
 1201                 rdsize = (attrnum == NTFS_A_INDXROOT) ? vap->va_datalen : blsize;
 1202                 error = ntfs_readattr(ntmp, ip, attrnum, "$I30",
 1203                                 ntfs_cntob(blnum * cpbl), rdsize, rdbuf, NULL);
 1204                 if (error)
 1205                         goto fail;
 1206 
 1207                 if (attrnum == NTFS_A_INDX) {
 1208                         error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
 1209                                                 rdbuf, rdsize);
 1210                         if (error)
 1211                                 goto fail;
 1212                 }
 1213                 if (aoff == 0)
 1214                         aoff = (attrnum == NTFS_A_INDX) ?
 1215                                 (0x18 + ((struct attr_indexalloc *) rdbuf)->ia_hdrsize) :
 1216                                 sizeof(struct attr_indexroot);
 1217 
 1218                 iep = (struct attr_indexentry *) (rdbuf + aoff);
 1219                 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
 1220                         aoff += iep->reclen,
 1221                         iep = (struct attr_indexentry *) (rdbuf + aoff))
 1222                 {
 1223                         if (!ntfs_isnamepermitted(ntmp, iep)) continue;
 1224 
 1225                         if (cnum >= num) {
 1226                                 fp->f_lastdnum = cnum;
 1227                                 fp->f_lastdoff = aoff;
 1228                                 fp->f_lastdblnum = blnum;
 1229                                 fp->f_lastdattr = attrnum;
 1230 
 1231                                 *riepp = iep;
 1232 
 1233                                 error = 0;
 1234                                 goto fail;
 1235                         }
 1236                         cnum++;
 1237                 }
 1238 
 1239                 if (iavap) {
 1240                         if (attrnum == NTFS_A_INDXROOT)
 1241                                 blnum = 0;
 1242                         else
 1243                                 blnum++;
 1244 
 1245                         while (ntfs_cntob(blnum * cpbl) < iavap->va_datalen) {
 1246                                 if (bmp[blnum >> 3] & (1 << (blnum & 3)))
 1247                                         break;
 1248                                 blnum++;
 1249                         }
 1250 
 1251                         attrnum = NTFS_A_INDX;
 1252                         aoff = 0;
 1253                         if (ntfs_cntob(blnum * cpbl) >= iavap->va_datalen)
 1254                                 break;
 1255                         dprintf(("ntfs_ntreaddir: blnum: %d\n", (u_int32_t) blnum));
 1256                 }
 1257         } while (iavap);
 1258 
 1259         *riepp = NULL;
 1260         fp->f_lastdnum = 0;
 1261 
 1262 fail:
 1263         if (vap)
 1264                 ntfs_ntvattrrele(vap);
 1265         if (bmvap)
 1266                 ntfs_ntvattrrele(bmvap);
 1267         if (iavap)
 1268                 ntfs_ntvattrrele(iavap);
 1269         if (bmp)
 1270                 FREE(bmp, M_TEMP);
 1271         ntfs_ntput(ip);
 1272         return (error);
 1273 }
 1274 
 1275 /*
 1276  * Convert NTFS times that are in 100 ns units and begins from
 1277  * 1601 Jan 1 into unix times.
 1278  */
 1279 struct timespec
 1280 ntfs_nttimetounix(
 1281                   u_int64_t nt)
 1282 {
 1283         struct timespec t;
 1284 
 1285         /* WindowNT times are in 100 ns and from 1601 Jan 1 */
 1286         t.tv_nsec = (nt % (1000 * 1000 * 10)) * 100;
 1287         t.tv_sec = nt / (1000 * 1000 * 10) -
 1288                 369LL * 365LL * 24LL * 60LL * 60LL -
 1289                 89LL * 1LL * 24LL * 60LL * 60LL;
 1290         return (t);
 1291 }
 1292 
 1293 /*
 1294  * Get file times from NTFS_A_NAME attribute.
 1295  */
 1296 int
 1297 ntfs_times(
 1298            struct ntfsmount * ntmp,
 1299            struct ntnode * ip,
 1300            ntfs_times_t * tm)
 1301 {
 1302         struct ntvattr *vap;
 1303         int             error;
 1304 
 1305         dprintf(("ntfs_times: ino: %d...\n", ip->i_number));
 1306 
 1307         error = ntfs_ntget(ip);
 1308         if (error)
 1309                 return (error);
 1310 
 1311         error = ntfs_ntvattrget(ntmp, ip, NTFS_A_NAME, NULL, 0, &vap);
 1312         if (error) {
 1313                 ntfs_ntput(ip);
 1314                 return (error);
 1315         }
 1316         *tm = vap->va_a_name->n_times;
 1317         ntfs_ntvattrrele(vap);
 1318         ntfs_ntput(ip);
 1319 
 1320         return (0);
 1321 }
 1322 
 1323 /*
 1324  * Get file sizes from corresponding attribute. 
 1325  * 
 1326  * ntnode under fnode should be locked.
 1327  */
 1328 int
 1329 ntfs_filesize(
 1330               struct ntfsmount * ntmp,
 1331               struct fnode * fp,
 1332               u_int64_t * size,
 1333               u_int64_t * bytes)
 1334 {
 1335         struct ntvattr *vap;
 1336         struct ntnode *ip = FTONT(fp);
 1337         u_int64_t       sz, bn;
 1338         int             error;
 1339 
 1340         dprintf(("ntfs_filesize: ino: %d\n", ip->i_number));
 1341 
 1342         error = ntfs_ntvattrget(ntmp, ip,
 1343                 fp->f_attrtype, fp->f_attrname, 0, &vap);
 1344         if (error)
 1345                 return (error);
 1346 
 1347         bn = vap->va_allocated;
 1348         sz = vap->va_datalen;
 1349 
 1350         dprintf(("ntfs_filesize: %d bytes (%d bytes allocated)\n",
 1351                 (u_int32_t) sz, (u_int32_t) bn));
 1352 
 1353         if (size)
 1354                 *size = sz;
 1355         if (bytes)
 1356                 *bytes = bn;
 1357 
 1358         ntfs_ntvattrrele(vap);
 1359 
 1360         return (0);
 1361 }
 1362 
 1363 /*
 1364  * This is one of write routine.
 1365  */
 1366 int
 1367 ntfs_writeattr_plain(
 1368         struct ntfsmount * ntmp,
 1369         struct ntnode * ip,
 1370         u_int32_t attrnum,      
 1371         char *attrname,
 1372         off_t roff,
 1373         size_t rsize,
 1374         void *rdata,
 1375         size_t * initp,
 1376         struct uio *uio)
 1377 {
 1378         size_t          init;
 1379         int             error = 0;
 1380         off_t           off = roff, left = rsize, towrite;
 1381         caddr_t         data = rdata;
 1382         struct ntvattr *vap;
 1383         *initp = 0;
 1384 
 1385         while (left) {
 1386                 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
 1387                                         ntfs_btocn(off), &vap);
 1388                 if (error)
 1389                         return (error);
 1390                 towrite = min(left, ntfs_cntob(vap->va_vcnend + 1) - off);
 1391                 ddprintf(("ntfs_writeattr_plain: o: %d, s: %d (%d - %d)\n",
 1392                          (u_int32_t) off, (u_int32_t) towrite,
 1393                          (u_int32_t) vap->va_vcnstart,
 1394                          (u_int32_t) vap->va_vcnend));
 1395                 error = ntfs_writentvattr_plain(ntmp, ip, vap,
 1396                                          off - ntfs_cntob(vap->va_vcnstart),
 1397                                          towrite, data, &init, uio);
 1398                 if (error) {
 1399                         printf("ntfs_writeattr_plain: " \
 1400                                "ntfs_writentvattr_plain failed: o: %d, s: %d\n",
 1401                                (u_int32_t) off, (u_int32_t) towrite);
 1402                         printf("ntfs_writeattr_plain: attrib: %d - %d\n",
 1403                                (u_int32_t) vap->va_vcnstart, 
 1404                                (u_int32_t) vap->va_vcnend);
 1405                         ntfs_ntvattrrele(vap);
 1406                         break;
 1407                 }
 1408                 ntfs_ntvattrrele(vap);
 1409                 left -= towrite;
 1410                 off += towrite;
 1411                 data = data + towrite;
 1412                 *initp += init;
 1413         }
 1414 
 1415         return (error);
 1416 }
 1417 
 1418 /*
 1419  * This is one of write routine.
 1420  *
 1421  * ntnode should be locked.
 1422  */
 1423 int
 1424 ntfs_writentvattr_plain(
 1425         struct ntfsmount * ntmp,
 1426         struct ntnode * ip,
 1427         struct ntvattr * vap,
 1428         off_t roff,
 1429         size_t rsize,
 1430         void *rdata,
 1431         size_t * initp,
 1432         struct uio *uio)
 1433 {
 1434         int             error = 0;
 1435         int             off;
 1436         int             cnt;
 1437         cn_t            ccn, ccl, cn, left, cl;
 1438         caddr_t         data = rdata;
 1439         struct buf     *bp;
 1440         size_t          tocopy;
 1441 
 1442         *initp = 0;
 1443 
 1444         if ((vap->va_flag & NTFS_AF_INRUN) == 0) {
 1445                 printf("ntfs_writevattr_plain: CAN'T WRITE RES. ATTRIBUTE\n");
 1446                 return ENOTTY;
 1447         }
 1448 
 1449         ddprintf(("ntfs_writentvattr_plain: data in run: %ld chains\n",
 1450                  vap->va_vruncnt));
 1451 
 1452         off = roff;
 1453         left = rsize;
 1454         ccl = 0;
 1455         ccn = 0;
 1456         cnt = 0;
 1457         for (; left && (cnt < vap->va_vruncnt); cnt++) {
 1458                 ccn = vap->va_vruncn[cnt];
 1459                 ccl = vap->va_vruncl[cnt];
 1460 
 1461                 ddprintf(("ntfs_writentvattr_plain: " \
 1462                          "left %d, cn: 0x%x, cl: %d, off: %d\n", \
 1463                          (u_int32_t) left, (u_int32_t) ccn, \
 1464                          (u_int32_t) ccl, (u_int32_t) off));
 1465 
 1466                 if (ntfs_cntob(ccl) < off) {
 1467                         off -= ntfs_cntob(ccl);
 1468                         cnt++;
 1469                         continue;
 1470                 }
 1471                 if (!ccn && ip->i_number != NTFS_BOOTINO)
 1472                         continue; /* XXX */
 1473 
 1474                 ccl -= ntfs_btocn(off);
 1475                 cn = ccn + ntfs_btocn(off);
 1476                 off = ntfs_btocnoff(off);
 1477 
 1478                 while (left && ccl) {
 1479                         /*
 1480                          * Always read and write single clusters at a time -
 1481                          * we need to avoid requesting differently-sized
 1482                          * blocks at the same disk offsets to avoid
 1483                          * confusing the buffer cache.
 1484                          */
 1485                         tocopy = min(left, ntfs_cntob(1) - off);
 1486                         cl = ntfs_btocl(tocopy + off);
 1487                         KASSERT(cl == 1 && tocopy <= ntfs_cntob(1),
 1488                             ("single cluster limit mistake"));
 1489                         ddprintf(("ntfs_writentvattr_plain: write: " \
 1490                                 "cn: 0x%x cl: %d, off: %d len: %d, left: %d\n",
 1491                                 (u_int32_t) cn, (u_int32_t) cl, 
 1492                                 (u_int32_t) off, (u_int32_t) tocopy, 
 1493                                 (u_int32_t) left));
 1494                         if ((off == 0) && (tocopy == ntfs_cntob(cl)))
 1495                         {
 1496                                 bp = getblk(ntmp->ntm_devvp, ntfs_cntobn(cn),
 1497                                             ntfs_cntob(cl), 0, 0, 0);
 1498                                 clrbuf(bp);
 1499                         } else {
 1500                                 error = bread(ntmp->ntm_devvp, ntfs_cntobn(cn),
 1501                                               ntfs_cntob(cl), NOCRED, &bp);
 1502                                 if (error) {
 1503                                         brelse(bp);
 1504                                         return (error);
 1505                                 }
 1506                         }
 1507                         if (uio)
 1508                                 uiomove(bp->b_data + off, tocopy, uio);
 1509                         else
 1510                                 memcpy(bp->b_data + off, data, tocopy);
 1511                         bawrite(bp);
 1512                         data = data + tocopy;
 1513                         *initp += tocopy;
 1514                         off = 0;
 1515                         left -= tocopy;
 1516                         cn += cl;
 1517                         ccl -= cl;
 1518                 }
 1519         }
 1520 
 1521         if (left) {
 1522                 printf("ntfs_writentvattr_plain: POSSIBLE RUN ERROR\n");
 1523                 error = EINVAL;
 1524         }
 1525 
 1526         return (error);
 1527 }
 1528 
 1529 /*
 1530  * This is one of read routines.
 1531  *
 1532  * ntnode should be locked.
 1533  */
 1534 int
 1535 ntfs_readntvattr_plain(
 1536         struct ntfsmount * ntmp,
 1537         struct ntnode * ip,
 1538         struct ntvattr * vap,
 1539         off_t roff,
 1540         size_t rsize,
 1541         void *rdata,
 1542         size_t * initp,
 1543         struct uio *uio)
 1544 {
 1545         int             error = 0;
 1546         int             off;
 1547 
 1548         *initp = 0;
 1549         if (vap->va_flag & NTFS_AF_INRUN) {
 1550                 int             cnt;
 1551                 cn_t            ccn, ccl, cn, left, cl;
 1552                 caddr_t         data = rdata;
 1553                 struct buf     *bp;
 1554                 size_t          tocopy;
 1555 
 1556                 ddprintf(("ntfs_readntvattr_plain: data in run: %ld chains\n",
 1557                          vap->va_vruncnt));
 1558 
 1559                 off = roff;
 1560                 left = rsize;
 1561                 ccl = 0;
 1562                 ccn = 0;
 1563                 cnt = 0;
 1564                 while (left && (cnt < vap->va_vruncnt)) {
 1565                         ccn = vap->va_vruncn[cnt];
 1566                         ccl = vap->va_vruncl[cnt];
 1567 
 1568                         ddprintf(("ntfs_readntvattr_plain: " \
 1569                                  "left %d, cn: 0x%x, cl: %d, off: %d\n", \
 1570                                  (u_int32_t) left, (u_int32_t) ccn, \
 1571                                  (u_int32_t) ccl, (u_int32_t) off));
 1572 
 1573                         if (ntfs_cntob(ccl) < off) {
 1574                                 off -= ntfs_cntob(ccl);
 1575                                 cnt++;
 1576                                 continue;
 1577                         }
 1578                         if (ccn || ip->i_number == NTFS_BOOTINO) {
 1579                                 ccl -= ntfs_btocn(off);
 1580                                 cn = ccn + ntfs_btocn(off);
 1581                                 off = ntfs_btocnoff(off);
 1582 
 1583                                 while (left && ccl) {
 1584                                         /*
 1585                                          * Always read single clusters at a
 1586                                          * time - we need to avoid reading
 1587                                          * differently-sized blocks at the
 1588                                          * same disk offsets to avoid
 1589                                          * confusing the buffer cache.
 1590                                          */
 1591                                         tocopy = min(left,
 1592                                             ntfs_cntob(1) - off);
 1593                                         cl = ntfs_btocl(tocopy + off);
 1594                                         KASSERT(cl == 1 &&
 1595                                             tocopy <= ntfs_cntob(1),
 1596                                             ("single cluster limit mistake"));
 1597 
 1598                                         ddprintf(("ntfs_readntvattr_plain: " \
 1599                                                 "read: cn: 0x%x cl: %d, " \
 1600                                                 "off: %d len: %d, left: %d\n",
 1601                                                 (u_int32_t) cn, 
 1602                                                 (u_int32_t) cl, 
 1603                                                 (u_int32_t) off, 
 1604                                                 (u_int32_t) tocopy, 
 1605                                                 (u_int32_t) left));
 1606                                         error = bread(ntmp->ntm_devvp,
 1607                                                       ntfs_cntobn(cn),
 1608                                                       ntfs_cntob(cl),
 1609                                                       NOCRED, &bp);
 1610                                         if (error) {
 1611                                                 brelse(bp);
 1612                                                 return (error);
 1613                                         }
 1614                                         if (uio) {
 1615                                                 uiomove(bp->b_data + off,
 1616                                                         tocopy, uio);
 1617                                         } else {
 1618                                                 memcpy(data, bp->b_data + off,
 1619                                                         tocopy);
 1620                                         }
 1621                                         brelse(bp);
 1622                                         data = data + tocopy;
 1623                                         *initp += tocopy;
 1624                                         off = 0;
 1625                                         left -= tocopy;
 1626                                         cn += cl;
 1627                                         ccl -= cl;
 1628                                 }
 1629                         } else {
 1630                                 tocopy = min(left, ntfs_cntob(ccl) - off);
 1631                                 ddprintf(("ntfs_readntvattr_plain: "
 1632                                         "hole: ccn: 0x%x ccl: %d, off: %d, " \
 1633                                         " len: %d, left: %d\n", 
 1634                                         (u_int32_t) ccn, (u_int32_t) ccl, 
 1635                                         (u_int32_t) off, (u_int32_t) tocopy, 
 1636                                         (u_int32_t) left));
 1637                                 left -= tocopy;
 1638                                 off = 0;
 1639                                 if (uio) {
 1640                                         size_t remains = tocopy;
 1641                                         for(; remains; remains--)
 1642                                                 uiomove("", 1, uio);
 1643                                 } else 
 1644                                         bzero(data, tocopy);
 1645                                 data = data + tocopy;
 1646                         }
 1647                         cnt++;
 1648                 }
 1649                 if (left) {
 1650                         printf("ntfs_readntvattr_plain: POSSIBLE RUN ERROR\n");
 1651                         error = E2BIG;
 1652                 }
 1653         } else {
 1654                 ddprintf(("ntfs_readnvattr_plain: data is in mft record\n"));
 1655                 if (uio) 
 1656                         uiomove(vap->va_datap + roff, rsize, uio);
 1657                 else
 1658                         memcpy(rdata, vap->va_datap + roff, rsize);
 1659                 *initp += rsize;
 1660         }
 1661 
 1662         return (error);
 1663 }
 1664 
 1665 /*
 1666  * This is one of read routines.
 1667  */
 1668 int
 1669 ntfs_readattr_plain(
 1670         struct ntfsmount * ntmp,
 1671         struct ntnode * ip,
 1672         u_int32_t attrnum,      
 1673         char *attrname,
 1674         off_t roff,
 1675         size_t rsize,
 1676         void *rdata,
 1677         size_t * initp,
 1678         struct uio *uio)
 1679 {
 1680         size_t          init;
 1681         int             error = 0;
 1682         off_t           off = roff, left = rsize, toread;
 1683         caddr_t         data = rdata;
 1684         struct ntvattr *vap;
 1685         *initp = 0;
 1686 
 1687         while (left) {
 1688                 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
 1689                                         ntfs_btocn(off), &vap);
 1690                 if (error)
 1691                         return (error);
 1692                 toread = min(left, ntfs_cntob(vap->va_vcnend + 1) - off);
 1693                 ddprintf(("ntfs_readattr_plain: o: %d, s: %d (%d - %d)\n",
 1694                          (u_int32_t) off, (u_int32_t) toread,
 1695                          (u_int32_t) vap->va_vcnstart,
 1696                          (u_int32_t) vap->va_vcnend));
 1697                 error = ntfs_readntvattr_plain(ntmp, ip, vap,
 1698                                          off - ntfs_cntob(vap->va_vcnstart),
 1699                                          toread, data, &init, uio);
 1700                 if (error) {
 1701                         printf("ntfs_readattr_plain: " \
 1702                                "ntfs_readntvattr_plain failed: o: %d, s: %d\n",
 1703                                (u_int32_t) off, (u_int32_t) toread);
 1704                         printf("ntfs_readattr_plain: attrib: %d - %d\n",
 1705                                (u_int32_t) vap->va_vcnstart, 
 1706                                (u_int32_t) vap->va_vcnend);
 1707                         ntfs_ntvattrrele(vap);
 1708                         break;
 1709                 }
 1710                 ntfs_ntvattrrele(vap);
 1711                 left -= toread;
 1712                 off += toread;
 1713                 data = data + toread;
 1714                 *initp += init;
 1715         }
 1716 
 1717         return (error);
 1718 }
 1719 
 1720 /*
 1721  * This is one of read routines.
 1722  */
 1723 int
 1724 ntfs_readattr(
 1725         struct ntfsmount * ntmp,
 1726         struct ntnode * ip,
 1727         u_int32_t attrnum,
 1728         char *attrname,
 1729         off_t roff,
 1730         size_t rsize,
 1731         void *rdata,
 1732         struct uio *uio)
 1733 {
 1734         int             error = 0;
 1735         struct ntvattr *vap;
 1736         size_t          init;
 1737 
 1738         ddprintf(("ntfs_readattr: reading %d: 0x%x, from %d size %d bytes\n",
 1739                ip->i_number, attrnum, (u_int32_t) roff, (u_int32_t) rsize));
 1740 
 1741         error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 0, &vap);
 1742         if (error)
 1743                 return (error);
 1744 
 1745         if ((roff > vap->va_datalen) ||
 1746             (roff + rsize > vap->va_datalen)) {
 1747                 ddprintf(("ntfs_readattr: offset too big\n"));
 1748                 ntfs_ntvattrrele(vap);
 1749                 return (E2BIG);
 1750         }
 1751         if (vap->va_compression && vap->va_compressalg) {
 1752                 u_int8_t       *cup;
 1753                 u_int8_t       *uup;
 1754                 off_t           off = roff, left = rsize, tocopy;
 1755                 caddr_t         data = rdata;
 1756                 cn_t            cn;
 1757 
 1758                 ddprintf(("ntfs_ntreadattr: compression: %d\n",
 1759                          vap->va_compressalg));
 1760 
 1761                 MALLOC(cup, u_int8_t *, ntfs_cntob(NTFS_COMPUNIT_CL),
 1762                        M_NTFSDECOMP, M_WAITOK);
 1763                 MALLOC(uup, u_int8_t *, ntfs_cntob(NTFS_COMPUNIT_CL),
 1764                        M_NTFSDECOMP, M_WAITOK);
 1765 
 1766                 cn = (ntfs_btocn(roff)) & (~(NTFS_COMPUNIT_CL - 1));
 1767                 off = roff - ntfs_cntob(cn);
 1768 
 1769                 while (left) {
 1770                         error = ntfs_readattr_plain(ntmp, ip, attrnum,
 1771                                                   attrname, ntfs_cntob(cn),
 1772                                                   ntfs_cntob(NTFS_COMPUNIT_CL),
 1773                                                   cup, &init, NULL);
 1774                         if (error)
 1775                                 break;
 1776 
 1777                         tocopy = min(left, ntfs_cntob(NTFS_COMPUNIT_CL) - off);
 1778 
 1779                         if (init == ntfs_cntob(NTFS_COMPUNIT_CL)) {
 1780                                 if (uio)
 1781                                         uiomove(cup + off, tocopy, uio);
 1782                                 else
 1783                                         memcpy(data, cup + off, tocopy);
 1784                         } else if (init == 0) {
 1785                                 if (uio) {
 1786                                         size_t remains = tocopy;
 1787                                         for(; remains; remains--)
 1788                                                 uiomove("", 1, uio);
 1789                                 }
 1790                                 else
 1791                                         bzero(data, tocopy);
 1792                         } else {
 1793                                 error = ntfs_uncompunit(ntmp, uup, cup);
 1794                                 if (error)
 1795                                         break;
 1796                                 if (uio)
 1797                                         uiomove(uup + off, tocopy, uio);
 1798                                 else
 1799                                         memcpy(data, uup + off, tocopy);
 1800                         }
 1801 
 1802                         left -= tocopy;
 1803                         data = data + tocopy;
 1804                         off += tocopy - ntfs_cntob(NTFS_COMPUNIT_CL);
 1805                         cn += NTFS_COMPUNIT_CL;
 1806                 }
 1807 
 1808                 FREE(uup, M_NTFSDECOMP);
 1809                 FREE(cup, M_NTFSDECOMP);
 1810         } else
 1811                 error = ntfs_readattr_plain(ntmp, ip, attrnum, attrname,
 1812                                              roff, rsize, rdata, &init, uio);
 1813         ntfs_ntvattrrele(vap);
 1814         return (error);
 1815 }
 1816 
 1817 #if UNUSED_CODE
 1818 int
 1819 ntfs_parserun(
 1820               cn_t * cn,
 1821               cn_t * cl,
 1822               u_int8_t * run,
 1823               u_long len,
 1824               u_long *off)
 1825 {
 1826         u_int8_t        sz;
 1827         int             i;
 1828 
 1829         if (NULL == run) {
 1830                 printf("ntfs_parsetun: run == NULL\n");
 1831                 return (EINVAL);
 1832         }
 1833         sz = run[(*off)++];
 1834         if (0 == sz) {
 1835                 printf("ntfs_parserun: trying to go out of run\n");
 1836                 return (E2BIG);
 1837         }
 1838         *cl = 0;
 1839         if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
 1840                 printf("ntfs_parserun: " \
 1841                        "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
 1842                        sz, len, *off);
 1843                 return (EINVAL);
 1844         }
 1845         for (i = 0; i < (sz & 0xF); i++)
 1846                 *cl += (u_int32_t) run[(*off)++] << (i << 3);
 1847 
 1848         sz >>= 4;
 1849         if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
 1850                 printf("ntfs_parserun: " \
 1851                        "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
 1852                        sz, len, *off);
 1853                 return (EINVAL);
 1854         }
 1855         for (i = 0; i < (sz & 0xF); i++)
 1856                 *cn += (u_int32_t) run[(*off)++] << (i << 3);
 1857 
 1858         return (0);
 1859 }
 1860 #endif
 1861 
 1862 /*
 1863  * Process fixup routine on given buffer.
 1864  */
 1865 int
 1866 ntfs_procfixups(
 1867                 struct ntfsmount * ntmp,
 1868                 u_int32_t magic,
 1869                 caddr_t buf,
 1870                 size_t len)
 1871 {
 1872         struct fixuphdr *fhp = (struct fixuphdr *) buf;
 1873         int             i;
 1874         u_int16_t       fixup;
 1875         u_int16_t      *fxp;
 1876         u_int16_t      *cfxp;
 1877 
 1878         if (fhp->fh_magic != magic) {
 1879                 printf("ntfs_procfixups: magic doesn't match: %08x != %08x\n",
 1880                        fhp->fh_magic, magic);
 1881                 return (EINVAL);
 1882         }
 1883         if ((fhp->fh_fnum - 1) * ntmp->ntm_bps != len) {
 1884                 printf("ntfs_procfixups: " \
 1885                        "bad fixups number: %d for %ld bytes block\n", 
 1886                        fhp->fh_fnum, (long)len);        /* XXX printf kludge */
 1887                 return (EINVAL);
 1888         }
 1889         if (fhp->fh_foff >= ntmp->ntm_spc * ntmp->ntm_mftrecsz * ntmp->ntm_bps) {
 1890                 printf("ntfs_procfixups: invalid offset: %x", fhp->fh_foff);
 1891                 return (EINVAL);
 1892         }
 1893         fxp = (u_int16_t *) (buf + fhp->fh_foff);
 1894         cfxp = (u_int16_t *) (buf + ntmp->ntm_bps - 2);
 1895         fixup = *fxp++;
 1896         for (i = 1; i < fhp->fh_fnum; i++, fxp++) {
 1897                 if (*cfxp != fixup) {
 1898                         printf("ntfs_procfixups: fixup %d doesn't match\n", i);
 1899                         return (EINVAL);
 1900                 }
 1901                 *cfxp = *fxp;
 1902                 cfxp = (u_int16_t *) ((caddr_t) cfxp + ntmp->ntm_bps);
 1903         }
 1904         return (0);
 1905 }
 1906 
 1907 #if UNUSED_CODE
 1908 int
 1909 ntfs_runtocn(
 1910              cn_t * cn, 
 1911              struct ntfsmount * ntmp,
 1912              u_int8_t * run,
 1913              u_long len,
 1914              cn_t vcn)
 1915 {
 1916         cn_t            ccn = 0;
 1917         cn_t            ccl = 0;
 1918         u_long          off = 0;
 1919         int             error = 0;
 1920 
 1921 #if NTFS_DEBUG
 1922         int             i;
 1923         printf("ntfs_runtocn: run: 0x%p, %ld bytes, vcn:%ld\n",
 1924                 run, len, (u_long) vcn);
 1925         printf("ntfs_runtocn: run: ");
 1926         for (i = 0; i < len; i++)
 1927                 printf("0x%02x ", run[i]);
 1928         printf("\n");
 1929 #endif
 1930 
 1931         if (NULL == run) {
 1932                 printf("ntfs_runtocn: run == NULL\n");
 1933                 return (EINVAL);
 1934         }
 1935         do {
 1936                 if (run[off] == 0) {
 1937                         printf("ntfs_runtocn: vcn too big\n");
 1938                         return (E2BIG);
 1939                 }
 1940                 vcn -= ccl;
 1941                 error = ntfs_parserun(&ccn, &ccl, run, len, &off);
 1942                 if (error) {
 1943                         printf("ntfs_runtocn: ntfs_parserun failed\n");
 1944                         return (error);
 1945                 }
 1946         } while (ccl <= vcn);
 1947         *cn = ccn + vcn;
 1948         return (0);
 1949 }
 1950 #endif
 1951 
 1952 /*
 1953  * this initializes toupper table & dependant variables to be ready for
 1954  * later work
 1955  */
 1956 void
 1957 ntfs_toupper_init()
 1958 {
 1959         ntfs_toupper_tab = (wchar *) NULL;
 1960         lockinit(&ntfs_toupper_lock, PVFS, "ntfs_toupper", 0, 0);
 1961         ntfs_toupper_usecount = 0;
 1962 }
 1963 
 1964 void
 1965 ntfs_toupper_destroy(void)
 1966 {
 1967 
 1968         lockdestroy(&ntfs_toupper_lock);
 1969 }
 1970 
 1971 /*
 1972  * if the ntfs_toupper_tab[] is filled already, just raise use count;
 1973  * otherwise read the data from the filesystem we are currently mounting
 1974  */
 1975 int
 1976 ntfs_toupper_use(mp, ntmp)
 1977         struct mount *mp;
 1978         struct ntfsmount *ntmp;
 1979 {
 1980         int error = 0;
 1981         struct vnode *vp;
 1982 
 1983         /* get exclusive access */
 1984         lockmgr(&ntfs_toupper_lock, LK_EXCLUSIVE, NULL, NULL);
 1985         
 1986         /* only read the translation data from a file if it hasn't been
 1987          * read already */
 1988         if (ntfs_toupper_tab)
 1989                 goto out;
 1990 
 1991         /*
 1992          * Read in Unicode lowercase -> uppercase translation file.
 1993          * XXX for now, just the first 256 entries are used anyway,
 1994          * so don't bother reading more
 1995          */
 1996         MALLOC(ntfs_toupper_tab, wchar *, 65536 * sizeof(wchar),
 1997                 M_NTFSRDATA, M_WAITOK);
 1998 
 1999         if ((error = VFS_VGET(mp, NTFS_UPCASEINO, LK_EXCLUSIVE, &vp)))
 2000                 goto out;
 2001         error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
 2002                         0, 65536*sizeof(wchar), (char *) ntfs_toupper_tab, NULL);
 2003         vput(vp);
 2004 
 2005     out:
 2006         ntfs_toupper_usecount++;
 2007         lockmgr(&ntfs_toupper_lock, LK_RELEASE, NULL, NULL);
 2008         return (error);
 2009 }
 2010 
 2011 /*
 2012  * lower the use count and if it reaches zero, free the memory
 2013  * tied by toupper table
 2014  */
 2015 void
 2016 ntfs_toupper_unuse()
 2017 {
 2018         /* get exclusive access */
 2019         lockmgr(&ntfs_toupper_lock, LK_EXCLUSIVE, NULL, NULL);
 2020 
 2021         ntfs_toupper_usecount--;
 2022         if (ntfs_toupper_usecount == 0) {
 2023                 FREE(ntfs_toupper_tab, M_NTFSRDATA);
 2024                 ntfs_toupper_tab = NULL;
 2025         }
 2026 #ifdef DIAGNOSTIC
 2027         else if (ntfs_toupper_usecount < 0) {
 2028                 panic("ntfs_toupper_unuse(): use count negative: %d\n",
 2029                         ntfs_toupper_usecount);
 2030         }
 2031 #endif
 2032         
 2033         /* release the lock */
 2034         lockmgr(&ntfs_toupper_lock, LK_RELEASE, NULL, NULL);
 2035 } 
 2036 
 2037 int
 2038 ntfs_u28_init(
 2039         struct ntfsmount *ntmp,
 2040         wchar *u2w,
 2041         char *cs_local,
 2042         char *cs_ntfs)
 2043 {
 2044         char ** u28;
 2045         int i, j, h, l;
 2046 
 2047         if (ntfs_iconv && cs_local) {
 2048                 ntfs_iconv->open(cs_local, cs_ntfs, &ntmp->ntm_ic_u2l);
 2049                 return (0);
 2050         }
 2051 
 2052         MALLOC(u28, char **, 256 * sizeof(char*), M_TEMP, M_WAITOK | M_ZERO);
 2053 
 2054         for (i=0; i<256; i++) {
 2055                 h = (u2w[i] >> 8) & 0xFF;
 2056                 l = (u2w[i]) &0xFF;
 2057 
 2058                 if (u28[h] == NULL) {
 2059                         MALLOC(u28[h], char *, 256 * sizeof(char), M_TEMP, M_WAITOK);
 2060                         for (j=0; j<256; j++)
 2061                                 u28[h][j] = '_';
 2062                 }
 2063 
 2064                 u28[h][l] = i & 0xFF;
 2065         }
 2066 
 2067         ntmp->ntm_u28 = u28;
 2068 
 2069         return (0);
 2070 }
 2071 
 2072 int
 2073 ntfs_u28_uninit(struct ntfsmount *ntmp)
 2074 {
 2075         char ** u28;
 2076         int i;
 2077 
 2078         if (ntmp->ntm_u28 == NULL) {
 2079                 if (ntfs_iconv && ntmp->ntm_ic_u2l) {
 2080                         ntfs_iconv->close(ntmp->ntm_ic_u2l);
 2081                 }
 2082                 return (0);
 2083         }
 2084 
 2085         u28 = ntmp->ntm_u28;
 2086 
 2087         for (i=0; i<256; i++)
 2088                 if (u28[i] != NULL)
 2089                         FREE(u28[i], M_TEMP);
 2090 
 2091         FREE(u28, M_TEMP);
 2092 
 2093         return (0);
 2094 }
 2095 
 2096 int
 2097 ntfs_82u_init(
 2098         struct ntfsmount *ntmp,
 2099         char *cs_local,
 2100         char *cs_ntfs)
 2101 {
 2102         wchar * _82u;
 2103         int i;
 2104 
 2105         if (ntfs_iconv && cs_local) {
 2106                 ntfs_iconv->open(cs_ntfs, cs_local, &ntmp->ntm_ic_l2u);
 2107                 return (0);
 2108         }
 2109 
 2110         MALLOC(_82u, wchar *, 256 * sizeof(wchar), M_TEMP, M_WAITOK);
 2111 
 2112         for (i=0; i<256; i++)
 2113                         _82u[i] = i;
 2114 
 2115         ntmp->ntm_82u = _82u;
 2116 
 2117         return (0);
 2118 }
 2119 
 2120 int
 2121 ntfs_82u_uninit(struct ntfsmount *ntmp)
 2122 {
 2123 
 2124         if (ntmp->ntm_82u == NULL) {
 2125                 if (ntfs_iconv && ntmp->ntm_ic_l2u) {
 2126                         ntfs_iconv->close(ntmp->ntm_ic_l2u);
 2127                 }
 2128                 return (0);
 2129         }
 2130 
 2131         FREE(ntmp->ntm_82u, M_TEMP);
 2132         return (0);
 2133 }
 2134 
 2135 /*
 2136  * maps the Unicode char to 8bit equivalent
 2137  * XXX currently only gets lower 8bit from the Unicode char
 2138  * and substitutes a '_' for it if the result would be '\0';
 2139  * something better has to be definitely though out
 2140  */
 2141 wchar
 2142 ntfs_u28(
 2143         struct ntfsmount *ntmp, 
 2144         wchar wc)
 2145 {
 2146         char *p, *outp, inbuf[3], outbuf[3];
 2147         size_t ilen, olen;
 2148 
 2149         if (ntfs_iconv && ntmp->ntm_ic_u2l) {
 2150                 ilen = olen = 2;
 2151 
 2152                 inbuf[0] = (char)(wc>>8);
 2153                 inbuf[1] = (char)wc;
 2154                 inbuf[2] = '\0';
 2155                 p = inbuf;
 2156                 outp = outbuf;
 2157                 ntfs_iconv->convchr(ntmp->ntm_ic_u2l, (const char **)&p, &ilen,
 2158                                     &outp, &olen);
 2159                 if (olen == 1) {
 2160                         return ((wchar)(outbuf[0]&0xFF));
 2161                 } else if (olen == 0) {
 2162                         return ((wchar)((outbuf[0]<<8) | (outbuf[1]&0xFF)));
 2163                 }
 2164                 return ('?');
 2165         }
 2166 
 2167         p = ntmp->ntm_u28[(wc>>8)&0xFF];
 2168         if (p == NULL)
 2169                 return ('_');
 2170         return (p[wc&0xFF]&0xFF);
 2171 }
 2172 
 2173 wchar
 2174 ntfs_82u(
 2175         struct ntfsmount *ntmp, 
 2176         wchar wc,
 2177         int *len)
 2178 {
 2179         char *p, *outp, inbuf[3], outbuf[3];
 2180         wchar uc;
 2181         size_t ilen, olen;
 2182 
 2183         if (ntfs_iconv && ntmp->ntm_ic_l2u) {
 2184                 ilen = (size_t)*len;
 2185                 olen = 2;
 2186 
 2187                 inbuf[0] = (char)(wc>>8);
 2188                 inbuf[1] = (char)wc;
 2189                 inbuf[2] = '\0';
 2190                 p = inbuf;
 2191                 outp = outbuf;
 2192                 ntfs_iconv->convchr(ntmp->ntm_ic_l2u, (const char **)&p, &ilen,
 2193                                     &outp, &olen);
 2194                 *len -= (int)ilen;
 2195                 uc = (wchar)((outbuf[0]<<8) | (outbuf[1]&0xFF));
 2196 
 2197                 return (uc);
 2198         }
 2199 
 2200         if (ntmp->ntm_82u != NULL)
 2201                 return (ntmp->ntm_82u[wc&0xFF]);
 2202 
 2203         return ('?');
 2204 }
 2205 

Cache object: 65d636037ee5db9cead5f3c7a4de6d8d


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