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 1.8 2004/03/22 16:39:30 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  *      Id: ntfs_subr.c,v 1.4 1999/05/12 09:43:01 semenu Exp
   29  */
   30 
   31 #include <sys/cdefs.h>
   32 __KERNEL_RCSID(0, "$NetBSD: ntfs_subr.c,v 1.8 2004/03/22 16:39:30 jdolecek Exp $");
   33 
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <sys/namei.h>
   37 #include <sys/proc.h>
   38 #include <sys/kernel.h>
   39 #include <sys/vnode.h>
   40 #include <sys/mount.h>
   41 #include <sys/buf.h>
   42 #include <sys/file.h>
   43 #include <sys/malloc.h>
   44 #include <sys/lock.h>
   45 #if defined(__FreeBSD__)
   46 #include <machine/clock.h>
   47 #endif
   48 
   49 #include <miscfs/specfs/specdev.h>
   50 
   51 /* #define NTFS_DEBUG 1 */
   52 #include <fs/ntfs/ntfs.h>
   53 #include <fs/ntfs/ntfsmount.h>
   54 #include <fs/ntfs/ntfs_inode.h>
   55 #include <fs/ntfs/ntfs_vfsops.h>
   56 #include <fs/ntfs/ntfs_subr.h>
   57 #include <fs/ntfs/ntfs_compr.h>
   58 #include <fs/ntfs/ntfs_ihash.h>
   59 
   60 #if defined(NTFS_DEBUG)
   61 int ntfs_debug = NTFS_DEBUG;
   62 #endif
   63 
   64 MALLOC_DEFINE(M_NTFSNTVATTR, "NTFS vattr", "NTFS file attribute information");
   65 MALLOC_DEFINE(M_NTFSRDATA, "NTFS res data", "NTFS resident data");
   66 MALLOC_DEFINE(M_NTFSRUN, "NTFS vrun", "NTFS vrun storage");
   67 MALLOC_DEFINE(M_NTFSDECOMP, "NTFS decomp", "NTFS decompression temporary");
   68 
   69 /* Local struct used in ntfs_ntlookupfile() */
   70 struct ntfs_lookup_ctx {
   71         u_int32_t       aoff;
   72         u_int32_t       rdsize;
   73         cn_t            cn;
   74         struct ntfs_lookup_ctx *prev;
   75 };
   76 
   77 static int ntfs_ntlookupattr __P((struct ntfsmount *, const char *, int, int *, char **));
   78 static int ntfs_findvattr __P((struct ntfsmount *, struct ntnode *, struct ntvattr **, struct ntvattr **, u_int32_t, const char *, size_t, cn_t));
   79 static int ntfs_uastricmp __P((struct ntfsmount *, const wchar *, size_t, const char *, size_t));
   80 static int ntfs_uastrcmp __P((struct ntfsmount *, const wchar *, size_t, const char *, size_t));
   81 
   82 /* table for mapping Unicode chars into uppercase; it's filled upon first
   83  * ntfs mount, freed upon last ntfs umount */
   84 static wchar *ntfs_toupper_tab;
   85 #define NTFS_U28(ch)            ((((ch) & 0xE0) == 0) ? '_' : (ch) & 0xFF)
   86 #define NTFS_TOUPPER(ch)        (ntfs_toupper_tab[(unsigned char)(ch)])
   87 static struct lock ntfs_toupper_lock;
   88 static signed int ntfs_toupper_usecount;
   89 
   90 /* support macro for ntfs_ntvattrget() */
   91 #define NTFS_AALPCMP(aalp,type,name,namelen) (                          \
   92   (aalp->al_type == type) && (aalp->al_namelen == namelen) &&           \
   93   !ntfs_uastrcmp(ntmp, aalp->al_name,aalp->al_namelen,name,namelen) )
   94 
   95 /*
   96  * 
   97  */
   98 int
   99 ntfs_ntvattrrele(vap)
  100         struct ntvattr * vap;
  101 {
  102         dprintf(("ntfs_ntvattrrele: ino: %d, type: 0x%x\n",
  103                  vap->va_ip->i_number, vap->va_type));
  104 
  105         ntfs_ntrele(vap->va_ip);
  106 
  107         return (0);
  108 }
  109 
  110 /*
  111  * find the attribute in the ntnode
  112  */
  113 static int
  114 ntfs_findvattr(ntmp, ip, lvapp, vapp, type, name, namelen, vcn)
  115         struct ntfsmount *ntmp;
  116         struct ntnode *ip;
  117         struct ntvattr **lvapp, **vapp;
  118         u_int32_t type;
  119         const char *name;
  120         size_t namelen;
  121         cn_t vcn;
  122 {
  123         int error;
  124         struct ntvattr *vap;
  125 
  126         if((ip->i_flag & IN_LOADED) == 0) {
  127                 dprintf(("ntfs_findvattr: node not loaded, ino: %d\n",
  128                        ip->i_number));
  129                 error = ntfs_loadntnode(ntmp,ip);
  130                 if (error) {
  131                         printf("ntfs_findvattr: FAILED TO LOAD INO: %d\n",
  132                                ip->i_number);
  133                         return (error);
  134                 }
  135         }
  136 
  137         *lvapp = NULL;
  138         *vapp = NULL;
  139         for (vap = ip->i_valist.lh_first; vap; vap = vap->va_list.le_next) {
  140                 ddprintf(("ntfs_findvattr: type: 0x%x, vcn: %d - %d\n", \
  141                           vap->va_type, (u_int32_t) vap->va_vcnstart, \
  142                           (u_int32_t) vap->va_vcnend));
  143                 if ((vap->va_type == type) &&
  144                     (vap->va_vcnstart <= vcn) && (vap->va_vcnend >= vcn) &&
  145                     (vap->va_namelen == namelen) &&
  146                     (strncmp(name, vap->va_name, namelen) == 0)) {
  147                         *vapp = vap;
  148                         ntfs_ntref(vap->va_ip);
  149                         return (0);
  150                 }
  151                 if (vap->va_type == NTFS_A_ATTRLIST)
  152                         *lvapp = vap;
  153         }
  154 
  155         return (-1);
  156 }
  157 
  158 /*
  159  * Search attribute specified in ntnode (load ntnode if necessary).
  160  * If not found but ATTR_A_ATTRLIST present, read it in and search through.
  161  * VOP_VGET node needed, and lookup through its ntnode (load if nessesary).
  162  *
  163  * ntnode should be locked
  164  */
  165 int
  166 ntfs_ntvattrget(
  167                 struct ntfsmount * ntmp,
  168                 struct ntnode * ip,
  169                 u_int32_t type,
  170                 const char *name,
  171                 cn_t vcn,
  172                 struct ntvattr ** vapp)
  173 {
  174         struct ntvattr *lvap = NULL;
  175         struct attr_attrlist *aalp;
  176         struct attr_attrlist *nextaalp;
  177         struct vnode   *newvp;
  178         struct ntnode  *newip;
  179         caddr_t         alpool;
  180         size_t          namelen, len;
  181         int             error;
  182 
  183         *vapp = NULL;
  184 
  185         if (name) {
  186                 dprintf(("ntfs_ntvattrget: " \
  187                          "ino: %d, type: 0x%x, name: %s, vcn: %d\n", \
  188                          ip->i_number, type, name, (u_int32_t) vcn));
  189                 namelen = strlen(name);
  190         } else {
  191                 dprintf(("ntfs_ntvattrget: " \
  192                          "ino: %d, type: 0x%x, vcn: %d\n", \
  193                          ip->i_number, type, (u_int32_t) vcn));
  194                 name = "";
  195                 namelen = 0;
  196         }
  197 
  198         error = ntfs_findvattr(ntmp, ip, &lvap, vapp, type, name, namelen, vcn);
  199         if (error >= 0)
  200                 return (error);
  201 
  202         if (!lvap) {
  203                 dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: " \
  204                        "ino: %d, type: 0x%x, name: %s, vcn: %d\n", \
  205                        ip->i_number, type, name, (u_int32_t) vcn));
  206                 return (ENOENT);
  207         }
  208         /* Scan $ATTRIBUTE_LIST for requested attribute */
  209         len = lvap->va_datalen;
  210         alpool = (caddr_t) malloc(len, M_TEMP, M_WAITOK);
  211         error = ntfs_readntvattr_plain(ntmp, ip, lvap, 0, len, alpool, &len,
  212                         NULL);
  213         if (error)
  214                 goto out;
  215 
  216         aalp = (struct attr_attrlist *) alpool;
  217         nextaalp = NULL;
  218 
  219         for(; len > 0; aalp = nextaalp) {
  220                 dprintf(("ntfs_ntvattrget: " \
  221                          "attrlist: ino: %d, attr: 0x%x, vcn: %d\n", \
  222                          aalp->al_inumber, aalp->al_type, \
  223                          (u_int32_t) aalp->al_vcnstart));
  224 
  225                 if (len > aalp->reclen) {
  226                         nextaalp = NTFS_NEXTREC(aalp, struct attr_attrlist *);
  227                 } else {
  228                         nextaalp = NULL;
  229                 }
  230                 len -= aalp->reclen;
  231 
  232                 if (!NTFS_AALPCMP(aalp, type, name, namelen) ||
  233                     (nextaalp && (nextaalp->al_vcnstart <= vcn) &&
  234                      NTFS_AALPCMP(nextaalp, type, name, namelen)))
  235                         continue;
  236 
  237                 dprintf(("ntfs_ntvattrget: attribute in ino: %d\n",
  238                                  aalp->al_inumber));
  239 
  240                 /* this is not a main record, so we can't use just plain
  241                    vget() */
  242                 error = ntfs_vgetex(ntmp->ntm_mountp, aalp->al_inumber,
  243                                 NTFS_A_DATA, NULL, LK_EXCLUSIVE,
  244                                 VG_EXT, curproc, &newvp);
  245                 if (error) {
  246                         printf("ntfs_ntvattrget: CAN'T VGET INO: %d\n",
  247                                aalp->al_inumber);
  248                         goto out;
  249                 }
  250                 newip = VTONT(newvp);
  251                 /* XXX have to lock ntnode */
  252                 error = ntfs_findvattr(ntmp, newip, &lvap, vapp,
  253                                 type, name, namelen, vcn);
  254                 vput(newvp);
  255                 if (error == 0)
  256                         goto out;
  257                 printf("ntfs_ntvattrget: ATTRLIST ERROR.\n");
  258                 break;
  259         }
  260         error = ENOENT;
  261 
  262         dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: " \
  263                "ino: %d, type: 0x%x, name: %.*s, vcn: %d\n", \
  264                ip->i_number, type, (int) namelen, name, (u_int32_t) vcn));
  265 out:
  266         free(alpool, M_TEMP);
  267         return (error);
  268 }
  269 
  270 /*
  271  * Read ntnode from disk, make ntvattr list.
  272  *
  273  * ntnode should be locked
  274  */
  275 int
  276 ntfs_loadntnode(
  277               struct ntfsmount * ntmp,
  278               struct ntnode * ip)
  279 {
  280         struct filerec  *mfrp;
  281         daddr_t         bn;
  282         int             error,off;
  283         struct attr    *ap;
  284         struct ntvattr *nvap;
  285 
  286         dprintf(("ntfs_loadntnode: loading ino: %d\n",ip->i_number));
  287 
  288         mfrp = (struct filerec *) malloc(ntfs_bntob(ntmp->ntm_bpmftrec),
  289                M_TEMP, M_WAITOK);
  290 
  291         if (ip->i_number < NTFS_SYSNODESNUM) {
  292                 struct buf     *bp;
  293 
  294                 dprintf(("ntfs_loadntnode: read system node\n"));
  295 
  296                 bn = ntfs_cntobn(ntmp->ntm_mftcn) +
  297                         ntmp->ntm_bpmftrec * ip->i_number;
  298 
  299                 error = bread(ntmp->ntm_devvp,
  300                               bn, ntfs_bntob(ntmp->ntm_bpmftrec),
  301                               NOCRED, &bp);
  302                 if (error) {
  303                         printf("ntfs_loadntnode: BREAD FAILED\n");
  304                         brelse(bp);
  305                         goto out;
  306                 }
  307                 memcpy(mfrp, bp->b_data, ntfs_bntob(ntmp->ntm_bpmftrec));
  308                 bqrelse(bp);
  309         } else {
  310                 struct vnode   *vp;
  311 
  312                 vp = ntmp->ntm_sysvn[NTFS_MFTINO];
  313                 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
  314                                ip->i_number * ntfs_bntob(ntmp->ntm_bpmftrec),
  315                                ntfs_bntob(ntmp->ntm_bpmftrec), mfrp, NULL);
  316                 if (error) {
  317                         printf("ntfs_loadntnode: ntfs_readattr failed\n");
  318                         goto out;
  319                 }
  320         }
  321 
  322         /* Check if magic and fixups are correct */
  323         error = ntfs_procfixups(ntmp, NTFS_FILEMAGIC, (caddr_t)mfrp,
  324                                 ntfs_bntob(ntmp->ntm_bpmftrec));
  325         if (error) {
  326                 printf("ntfs_loadntnode: BAD MFT RECORD %d\n",
  327                        (u_int32_t) ip->i_number);
  328                 goto out;
  329         }
  330 
  331         dprintf(("ntfs_loadntnode: load attrs for ino: %d\n",ip->i_number));
  332         off = mfrp->fr_attroff;
  333         ap = (struct attr *) ((caddr_t)mfrp + off);
  334 
  335         LIST_INIT(&ip->i_valist);
  336         
  337         while (ap->a_hdr.a_type != -1) {
  338                 error = ntfs_attrtontvattr(ntmp, &nvap, ap);
  339                 if (error)
  340                         break;
  341                 nvap->va_ip = ip;
  342 
  343                 LIST_INSERT_HEAD(&ip->i_valist, nvap, va_list);
  344 
  345                 off += ap->a_hdr.reclen;
  346                 ap = (struct attr *) ((caddr_t)mfrp + off);
  347         }
  348         if (error) {
  349                 printf("ntfs_loadntnode: failed to load attr ino: %d\n",
  350                        ip->i_number);
  351                 goto out;
  352         }
  353 
  354         ip->i_mainrec = mfrp->fr_mainrec;
  355         ip->i_nlink = mfrp->fr_nlink;
  356         ip->i_frflag = mfrp->fr_flags;
  357 
  358         ip->i_flag |= IN_LOADED;
  359 
  360 out:
  361         free(mfrp, M_TEMP);
  362         return (error);
  363 }
  364                 
  365 /*
  366  * Routine locks ntnode and increase usecount, just opposite of
  367  * ntfs_ntput().
  368  */
  369 int
  370 ntfs_ntget(ip)
  371         struct ntnode *ip;
  372 {
  373         dprintf(("ntfs_ntget: get ntnode %d: %p, usecount: %d\n",
  374                 ip->i_number, ip, ip->i_usecount));
  375 
  376         simple_lock(&ip->i_interlock);
  377         ip->i_usecount++;
  378         lockmgr(&ip->i_lock, LK_EXCLUSIVE | LK_INTERLOCK, &ip->i_interlock);
  379 
  380         return 0;
  381 }
  382 
  383 /*
  384  * Routine search ntnode in hash, if found: lock, inc usecount and return.
  385  * If not in hash allocate structure for ntnode, prefill it, lock,
  386  * inc count and return.
  387  *
  388  * ntnode returned locked
  389  */
  390 int
  391 ntfs_ntlookup(
  392            struct ntfsmount * ntmp,
  393            ino_t ino,
  394            struct ntnode ** ipp)
  395 {
  396         struct ntnode  *ip;
  397 
  398         dprintf(("ntfs_ntlookup: looking for ntnode %d\n", ino));
  399 
  400         do {
  401                 if ((ip = ntfs_nthashlookup(ntmp->ntm_dev, ino)) != NULL) {
  402                         ntfs_ntget(ip);
  403                         dprintf(("ntfs_ntlookup: ntnode %d: %p, usecount: %d\n",
  404                                 ino, ip, ip->i_usecount));
  405                         *ipp = ip;
  406                         return (0);
  407                 }
  408         } while (lockmgr(&ntfs_hashlock, LK_EXCLUSIVE | LK_SLEEPFAIL, NULL));
  409 
  410         MALLOC(ip, struct ntnode *, sizeof(struct ntnode),
  411                M_NTFSNTNODE, M_WAITOK);
  412         ddprintf(("ntfs_ntlookup: allocating ntnode: %d: %p\n", ino, ip));
  413         bzero((caddr_t) ip, sizeof(struct ntnode));
  414 
  415         /* Generic initialization */
  416         ip->i_devvp = ntmp->ntm_devvp;
  417         ip->i_dev = ntmp->ntm_dev;
  418         ip->i_number = ino;
  419         ip->i_mp = ntmp;
  420 
  421         LIST_INIT(&ip->i_fnlist);
  422 
  423         /* init lock and lock the newborn ntnode */
  424         lockinit(&ip->i_lock, PINOD, "ntnode", 0, LK_EXCLUSIVE);
  425         simple_lock_init(&ip->i_interlock);
  426         ntfs_ntget(ip);
  427 
  428         ntfs_nthashins(ip);
  429 
  430         lockmgr(&ntfs_hashlock, LK_RELEASE, NULL);
  431 
  432         *ipp = ip;
  433 
  434         dprintf(("ntfs_ntlookup: ntnode %d: %p, usecount: %d\n",
  435                 ino, ip, ip->i_usecount));
  436 
  437         return (0);
  438 }
  439 
  440 /*
  441  * Decrement usecount of ntnode and unlock it, if usecount reach zero,
  442  * deallocate ntnode.
  443  *
  444  * ntnode should be locked on entry, and unlocked on return.
  445  */
  446 void
  447 ntfs_ntput(ip)
  448         struct ntnode *ip;
  449 {
  450         struct ntvattr *vap;
  451 
  452         dprintf(("ntfs_ntput: rele ntnode %d: %p, usecount: %d\n",
  453                 ip->i_number, ip, ip->i_usecount));
  454 
  455         simple_lock(&ip->i_interlock);
  456         ip->i_usecount--;
  457 
  458 #ifdef DIAGNOSTIC
  459         if (ip->i_usecount < 0) {
  460                 panic("ntfs_ntput: ino: %d usecount: %d ",
  461                       ip->i_number,ip->i_usecount);
  462         }
  463 #endif
  464 
  465         lockmgr(&ip->i_lock, LK_RELEASE|LK_INTERLOCK, &ip->i_interlock);
  466 
  467         if (ip->i_usecount == 0) {
  468                 dprintf(("ntfs_ntput: deallocating ntnode: %d\n",
  469                         ip->i_number));
  470 
  471                 if (ip->i_fnlist.lh_first)
  472                         panic("ntfs_ntput: ntnode has fnodes");
  473 
  474                 ntfs_nthashrem(ip);
  475 
  476                 while (ip->i_valist.lh_first != NULL) {
  477                         vap = ip->i_valist.lh_first;
  478                         LIST_REMOVE(vap,va_list);
  479                         ntfs_freentvattr(vap);
  480                 }
  481                 FREE(ip, M_NTFSNTNODE);
  482         }
  483 }
  484 
  485 /*
  486  * increment usecount of ntnode 
  487  */
  488 void
  489 ntfs_ntref(ip)
  490         struct ntnode *ip;
  491 {
  492         simple_lock(&ip->i_interlock);
  493         ip->i_usecount++;
  494         simple_unlock(&ip->i_interlock);
  495 
  496         dprintf(("ntfs_ntref: ino %d, usecount: %d\n",
  497                 ip->i_number, ip->i_usecount));
  498                         
  499 }
  500 
  501 /*
  502  * Decrement usecount of ntnode.
  503  */
  504 void
  505 ntfs_ntrele(ip)
  506         struct ntnode *ip;
  507 {
  508         dprintf(("ntfs_ntrele: rele ntnode %d: %p, usecount: %d\n",
  509                 ip->i_number, ip, ip->i_usecount));
  510 
  511         simple_lock(&ip->i_interlock);
  512         ip->i_usecount--;
  513 
  514         if (ip->i_usecount < 0)
  515                 panic("ntfs_ntrele: ino: %d usecount: %d ",
  516                       ip->i_number,ip->i_usecount);
  517         simple_unlock(&ip->i_interlock);
  518 }
  519 
  520 /*
  521  * Deallocate all memory allocated for ntvattr
  522  */
  523 void
  524 ntfs_freentvattr(vap)
  525         struct ntvattr * vap;
  526 {
  527         if (vap->va_flag & NTFS_AF_INRUN) {
  528                 if (vap->va_vruncn)
  529                         free(vap->va_vruncn, M_NTFSRUN);
  530                 if (vap->va_vruncl)
  531                         free(vap->va_vruncl, M_NTFSRUN);
  532         } else {
  533                 if (vap->va_datap)
  534                         free(vap->va_datap, M_NTFSRDATA);
  535         }
  536         FREE(vap, M_NTFSNTVATTR);
  537 }
  538 
  539 /*
  540  * Convert disk image of attribute into ntvattr structure,
  541  * runs are expanded also.
  542  */
  543 int
  544 ntfs_attrtontvattr(
  545                    struct ntfsmount * ntmp,
  546                    struct ntvattr ** rvapp,
  547                    struct attr * rap)
  548 {
  549         int             error, i;
  550         struct ntvattr *vap;
  551 
  552         error = 0;
  553         *rvapp = NULL;
  554 
  555         MALLOC(vap, struct ntvattr *, sizeof(struct ntvattr),
  556                 M_NTFSNTVATTR, M_WAITOK);
  557         bzero(vap, sizeof(struct ntvattr));
  558         vap->va_ip = NULL;
  559         vap->va_flag = rap->a_hdr.a_flag;
  560         vap->va_type = rap->a_hdr.a_type;
  561         vap->va_compression = rap->a_hdr.a_compression;
  562         vap->va_index = rap->a_hdr.a_index;
  563 
  564         ddprintf(("type: 0x%x, index: %d", vap->va_type, vap->va_index));
  565 
  566         vap->va_namelen = rap->a_hdr.a_namelen;
  567         if (rap->a_hdr.a_namelen) {
  568                 wchar *unp = (wchar *) ((caddr_t) rap + rap->a_hdr.a_nameoff);
  569                 ddprintf((", name:["));
  570                 for (i = 0; i < vap->va_namelen; i++) {
  571                         vap->va_name[i] = unp[i];
  572                         ddprintf(("%c", vap->va_name[i]));
  573                 }
  574                 ddprintf(("]"));
  575         }
  576         if (vap->va_flag & NTFS_AF_INRUN) {
  577                 ddprintf((", nonres."));
  578                 vap->va_datalen = rap->a_nr.a_datalen;
  579                 vap->va_allocated = rap->a_nr.a_allocated;
  580                 vap->va_vcnstart = rap->a_nr.a_vcnstart;
  581                 vap->va_vcnend = rap->a_nr.a_vcnend;
  582                 vap->va_compressalg = rap->a_nr.a_compressalg;
  583                 error = ntfs_runtovrun(&(vap->va_vruncn), &(vap->va_vruncl),
  584                                        &(vap->va_vruncnt),
  585                                        (caddr_t) rap + rap->a_nr.a_dataoff);
  586         } else {
  587                 vap->va_compressalg = 0;
  588                 ddprintf((", res."));
  589                 vap->va_datalen = rap->a_r.a_datalen;
  590                 vap->va_allocated = rap->a_r.a_datalen;
  591                 vap->va_vcnstart = 0;
  592                 vap->va_vcnend = ntfs_btocn(vap->va_allocated);
  593                 vap->va_datap = (caddr_t) malloc(vap->va_datalen,
  594                        M_NTFSRDATA, M_WAITOK);
  595                 memcpy(vap->va_datap, (caddr_t) rap + rap->a_r.a_dataoff,
  596                        rap->a_r.a_datalen);
  597         }
  598         ddprintf((", len: %d", vap->va_datalen));
  599 
  600         if (error)
  601                 FREE(vap, M_NTFSNTVATTR);
  602         else
  603                 *rvapp = vap;
  604 
  605         ddprintf(("\n"));
  606 
  607         return (error);
  608 }
  609 
  610 /*
  611  * Expand run into more utilizable and more memory eating format.
  612  */
  613 int
  614 ntfs_runtovrun(
  615                cn_t ** rcnp,
  616                cn_t ** rclp,
  617                u_long * rcntp,
  618                u_int8_t * run)
  619 {
  620         u_int32_t       off;
  621         u_int32_t       sz, i;
  622         cn_t           *cn;
  623         cn_t           *cl;
  624         u_long          cnt;
  625         cn_t            prev;
  626         cn_t            tmp;
  627 
  628         off = 0;
  629         cnt = 0;
  630         i = 0;
  631         while (run[off]) {
  632                 off += (run[off] & 0xF) + ((run[off] >> 4) & 0xF) + 1;
  633                 cnt++;
  634         }
  635         cn = (cn_t *) malloc(cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
  636         cl = (cn_t *) malloc(cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
  637 
  638         off = 0;
  639         cnt = 0;
  640         prev = 0;
  641         while (run[off]) {
  642 
  643                 sz = run[off++];
  644                 cl[cnt] = 0;
  645 
  646                 for (i = 0; i < (sz & 0xF); i++)
  647                         cl[cnt] += (u_int32_t) run[off++] << (i << 3);
  648 
  649                 sz >>= 4;
  650                 if (run[off + sz - 1] & 0x80) {
  651                         tmp = ((u_int64_t) - 1) << (sz << 3);
  652                         for (i = 0; i < sz; i++)
  653                                 tmp |= (u_int64_t) run[off++] << (i << 3);
  654                 } else {
  655                         tmp = 0;
  656                         for (i = 0; i < sz; i++)
  657                                 tmp |= (u_int64_t) run[off++] << (i << 3);
  658                 }
  659                 if (tmp)
  660                         prev = cn[cnt] = prev + tmp;
  661                 else
  662                         cn[cnt] = tmp;
  663 
  664                 cnt++;
  665         }
  666         *rcnp = cn;
  667         *rclp = cl;
  668         *rcntp = cnt;
  669         return (0);
  670 }
  671 
  672 /*
  673  * Compare unicode and ascii string case insens.
  674  */
  675 static int
  676 ntfs_uastricmp(ntmp, ustr, ustrlen, astr, astrlen)
  677         struct ntfsmount *ntmp;
  678         const wchar *ustr;
  679         size_t ustrlen;
  680         const char *astr;
  681         size_t astrlen;
  682 {
  683         size_t  i;
  684         int             res;
  685         const char *astrend = astr + astrlen;
  686 
  687         for (i = 0; i < ustrlen && astr < astrend; i++) {
  688                 res = (*ntmp->ntm_wcmp)(NTFS_TOUPPER(ustr[i]),
  689                                 NTFS_TOUPPER((*ntmp->ntm_wget)(&astr)) );
  690                 if (res)
  691                         return res;
  692         }
  693 
  694         if (i == ustrlen && astr == astrend)
  695                 return 0;
  696         else if (i == ustrlen)
  697                 return -1;
  698         else
  699                 return 1;
  700 }
  701 
  702 /*
  703  * Compare unicode and ascii string case sens.
  704  */
  705 static int
  706 ntfs_uastrcmp(ntmp, ustr, ustrlen, astr, astrlen)
  707         struct ntfsmount *ntmp;
  708         const wchar *ustr;
  709         size_t ustrlen;
  710         const char *astr;
  711         size_t astrlen;
  712 {
  713         size_t             i;
  714         int             res;
  715         const char *astrend = astr + astrlen;
  716 
  717         for (i = 0; (i < ustrlen) && (astr < astrend); i++) {
  718                 res = (*ntmp->ntm_wcmp)(ustr[i], (*ntmp->ntm_wget)(&astr));
  719                 if (res)
  720                         return res;
  721         }
  722 
  723         if (i == ustrlen && astr == astrend)
  724                 return 0;
  725         else if (i == ustrlen)
  726                 return -1;
  727         else
  728                 return 1;
  729 }
  730 
  731 /* 
  732  * Search fnode in ntnode, if not found allocate and preinitialize.
  733  *
  734  * ntnode should be locked on entry.
  735  */
  736 int
  737 ntfs_fget(
  738         struct ntfsmount *ntmp,
  739         struct ntnode *ip,
  740         int attrtype,
  741         char *attrname,
  742         struct fnode **fpp)
  743 {
  744         struct fnode *fp;
  745 
  746         dprintf(("ntfs_fget: ino: %d, attrtype: 0x%x, attrname: %s\n",
  747                 ip->i_number,attrtype, attrname?attrname:""));
  748         *fpp = NULL;
  749         for (fp = ip->i_fnlist.lh_first; fp != NULL; fp = fp->f_fnlist.le_next){
  750                 dprintf(("ntfs_fget: fnode: attrtype: %d, attrname: %s\n",
  751                         fp->f_attrtype, fp->f_attrname?fp->f_attrname:""));
  752 
  753                 if ((attrtype == fp->f_attrtype) && 
  754                     ((!attrname && !fp->f_attrname) ||
  755                      (attrname && fp->f_attrname &&
  756                       !strcmp(attrname,fp->f_attrname)))){
  757                         dprintf(("ntfs_fget: found existed: %p\n",fp));
  758                         *fpp = fp;
  759                 }
  760         }
  761 
  762         if (*fpp)
  763                 return (0);
  764 
  765         MALLOC(fp, struct fnode *, sizeof(struct fnode), M_NTFSFNODE, M_WAITOK);
  766         bzero(fp, sizeof(struct fnode));
  767         dprintf(("ntfs_fget: allocating fnode: %p\n",fp));
  768 
  769         fp->f_ip = ip;
  770         fp->f_attrname = attrname;
  771         if (fp->f_attrname) fp->f_flag |= FN_AATTRNAME;
  772         fp->f_attrtype = attrtype;
  773 
  774         ntfs_ntref(ip);
  775 
  776         LIST_INSERT_HEAD(&ip->i_fnlist, fp, f_fnlist);
  777 
  778         *fpp = fp;
  779 
  780         return (0);
  781 }
  782 
  783 /*
  784  * Deallocate fnode, remove it from ntnode's fnode list.
  785  *
  786  * ntnode should be locked.
  787  */
  788 void
  789 ntfs_frele(
  790         struct fnode *fp)
  791 {
  792         struct ntnode *ip = FTONT(fp);
  793 
  794         dprintf(("ntfs_frele: fnode: %p for %d: %p\n", fp, ip->i_number, ip));
  795 
  796         dprintf(("ntfs_frele: deallocating fnode\n"));
  797         LIST_REMOVE(fp,f_fnlist);
  798         if (fp->f_flag & FN_AATTRNAME)
  799                 FREE(fp->f_attrname, M_TEMP);
  800         if (fp->f_dirblbuf)
  801                 FREE(fp->f_dirblbuf, M_NTFSDIR);
  802         FREE(fp, M_NTFSFNODE);
  803         ntfs_ntrele(ip);
  804 }
  805 
  806 /*
  807  * Lookup attribute name in format: [[:$ATTR_TYPE]:$ATTR_NAME], 
  808  * $ATTR_TYPE is searched in attrdefs read from $AttrDefs.
  809  * If $ATTR_TYPE not specified, ATTR_A_DATA assumed.
  810  */
  811 static int
  812 ntfs_ntlookupattr(
  813                 struct ntfsmount * ntmp,
  814                 const char * name,
  815                 int namelen,
  816                 int *attrtype,
  817                 char **attrname)
  818 {
  819         const char *sys;
  820         size_t syslen, i;
  821         struct ntvattrdef *adp;
  822 
  823         if (namelen == 0)
  824                 return (0);
  825 
  826         if (name[0] == '$') {
  827                 sys = name;
  828                 for (syslen = 0; syslen < namelen; syslen++) {
  829                         if(sys[syslen] == ':') {
  830                                 name++;
  831                                 namelen--;
  832                                 break;
  833                         }
  834                 }
  835                 name += syslen;
  836                 namelen -= syslen;
  837 
  838                 adp = ntmp->ntm_ad;
  839                 for (i = 0; i < ntmp->ntm_adnum; i++, adp++){
  840                         if (syslen != adp->ad_namelen || 
  841                            strncmp(sys, adp->ad_name, syslen) != 0)
  842                                 continue;
  843 
  844                         *attrtype = adp->ad_type;
  845                         goto out;
  846                 }
  847                 return (ENOENT);
  848         }
  849 
  850     out:
  851         if (namelen) {
  852                 *attrname = (char *) malloc(namelen, M_TEMP, M_WAITOK);
  853                 memcpy((*attrname), name, namelen);
  854                 (*attrname)[namelen] = '\0';
  855                 *attrtype = NTFS_A_DATA;
  856         }
  857 
  858         return (0);
  859 }
  860 
  861 /*
  862  * Lookup specified node for filename, matching cnp,
  863  * return fnode filled.
  864  */
  865 int
  866 ntfs_ntlookupfile(
  867               struct ntfsmount * ntmp,
  868               struct vnode * vp,
  869               struct componentname * cnp,
  870               struct vnode ** vpp)
  871 {
  872         struct fnode   *fp = VTOF(vp);
  873         struct ntnode  *ip = FTONT(fp);
  874         struct ntvattr *vap;    /* Root attribute */
  875         cn_t            cn = 0; /* VCN in current attribute */
  876         caddr_t         rdbuf;  /* Buffer to read directory's blocks  */
  877         u_int32_t       blsize;
  878         u_int32_t       rdsize; /* Length of data to read from current block */
  879         struct attr_indexentry *iep;
  880         int             error, res, anamelen, fnamelen;
  881         const char     *fname,*aname;
  882         u_int32_t       aoff;
  883         int attrtype = NTFS_A_DATA;
  884         char *attrname = NULL;
  885         struct fnode   *nfp;
  886         struct vnode   *nvp;
  887         enum vtype      f_type;
  888         int fullscan = 0;
  889         struct ntfs_lookup_ctx *lookup_ctx = NULL, *tctx;
  890 
  891         error = ntfs_ntget(ip);
  892         if (error)
  893                 return (error);
  894 
  895         error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
  896         if (error || (vap->va_flag & NTFS_AF_INRUN))
  897                 return (ENOTDIR);
  898 
  899         /*
  900          * Divide file name into: foofilefoofilefoofile[:attrspec]
  901          * Store like this:       fname:fnamelen       [aname:anamelen]
  902          */
  903         fname = cnp->cn_nameptr;
  904         aname = NULL;
  905         anamelen = 0;
  906         for (fnamelen = 0; fnamelen < cnp->cn_namelen; fnamelen++)
  907                 if(fname[fnamelen] == ':') {
  908                         aname = fname + fnamelen + 1;
  909                         anamelen = cnp->cn_namelen - fnamelen - 1;
  910                         dprintf(("ntfs_ntlookupfile: %s (%d), attr: %s (%d)\n",
  911                                 fname, fnamelen, aname, anamelen));
  912                         break;
  913                 }
  914 
  915         blsize = vap->va_a_iroot->ir_size;
  916         dprintf(("ntfs_ntlookupfile: blksz: %d\n", blsize));
  917 
  918         rdbuf = (caddr_t) malloc(blsize, M_TEMP, M_WAITOK);
  919 
  920     loop:
  921         rdsize = vap->va_datalen;
  922         dprintf(("ntfs_ntlookupfile: rdsz: %d\n", rdsize));
  923 
  924         error = ntfs_readattr(ntmp, ip, NTFS_A_INDXROOT, "$I30",
  925                                0, rdsize, rdbuf, NULL);
  926         if (error)
  927                 goto fail;
  928 
  929         aoff = sizeof(struct attr_indexroot);
  930 
  931         do {
  932                 iep = (struct attr_indexentry *) (rdbuf + aoff);
  933 
  934                 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
  935                         aoff += iep->reclen,
  936                         iep = (struct attr_indexentry *) (rdbuf + aoff))
  937                 {
  938                         ddprintf(("scan: %d, %d\n",
  939                                   (u_int32_t) iep->ie_number,
  940                                   (u_int32_t) iep->ie_fnametype));
  941  
  942                         /* check the name - the case-insensitive check
  943                          * has to come first, to break from this for loop
  944                          * if needed, so we can dive correctly */
  945                         res = ntfs_uastricmp(ntmp, iep->ie_fname,
  946                                 iep->ie_fnamelen, fname, fnamelen);
  947                         if (!fullscan) {
  948                                 if (res > 0) break;
  949                                 if (res < 0) continue;
  950                         }
  951 
  952                         if (iep->ie_fnametype == 0 ||
  953                             !(ntmp->ntm_flag & NTFS_MFLAG_CASEINS))
  954                         {
  955                                 res = ntfs_uastrcmp(ntmp, iep->ie_fname,
  956                                         iep->ie_fnamelen, fname, fnamelen);
  957                                 if (res != 0 && !fullscan) continue;
  958                         }
  959 
  960                         /* if we perform full scan, the file does not match
  961                          * and this is subnode, dive */
  962                         if (fullscan && res != 0) {
  963                             if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) {
  964                                 MALLOC(tctx, struct ntfs_lookup_ctx *,
  965                                         sizeof(struct ntfs_lookup_ctx),
  966                                         M_TEMP, M_WAITOK);
  967                                 tctx->aoff      = aoff + iep->reclen;
  968                                 tctx->rdsize    = rdsize;
  969                                 tctx->cn        = cn;
  970                                 tctx->prev      = lookup_ctx;
  971                                 lookup_ctx = tctx;
  972                                 break;
  973                             } else
  974                                 continue;
  975                         }
  976 
  977                         if (aname) {
  978                                 error = ntfs_ntlookupattr(ntmp,
  979                                         aname, anamelen,
  980                                         &attrtype, &attrname);
  981                                 if (error)
  982                                         goto fail;
  983                         }
  984 
  985                         /* Check if we've found ourselves */
  986                         if ((iep->ie_number == ip->i_number) &&
  987                             (attrtype == fp->f_attrtype) &&
  988                             ((!attrname && !fp->f_attrname) ||
  989                              (attrname && fp->f_attrname &&
  990                               !strcmp(attrname, fp->f_attrname))))
  991                         {
  992                                 VREF(vp);
  993                                 *vpp = vp;
  994                                 error = 0;
  995                                 goto fail;
  996                         }
  997 
  998                         /* free the buffer returned by ntfs_ntlookupattr() */
  999                         if (attrname) {
 1000                                 FREE(attrname, M_TEMP);
 1001                                 attrname = NULL;
 1002                         }
 1003 
 1004                         /* vget node, but don't load it */
 1005                         error = ntfs_vgetex(ntmp->ntm_mountp,
 1006                                    iep->ie_number, attrtype, attrname,
 1007                                    LK_EXCLUSIVE, VG_DONTLOADIN | VG_DONTVALIDFN,
 1008                                    curproc, &nvp);
 1009                         if (error)
 1010                                 goto fail;
 1011 
 1012                         nfp = VTOF(nvp);
 1013 
 1014                         if (nfp->f_flag & FN_VALID) {
 1015                                 *vpp = nvp;
 1016                                 goto fail;
 1017                         }
 1018 
 1019                         nfp->f_fflag = iep->ie_fflag;
 1020                         nfp->f_pnumber = iep->ie_fpnumber;
 1021                         nfp->f_times = iep->ie_ftimes;
 1022 
 1023                         if((nfp->f_fflag & NTFS_FFLAG_DIR) &&
 1024                            (nfp->f_attrtype == NTFS_A_DATA) &&
 1025                            (nfp->f_attrname == NULL))
 1026                                 f_type = VDIR;  
 1027                         else
 1028                                 f_type = VREG;  
 1029 
 1030                         nvp->v_type = f_type;
 1031 
 1032                         if ((nfp->f_attrtype == NTFS_A_DATA) &&
 1033                             (nfp->f_attrname == NULL))
 1034                         {
 1035                                 /* Opening default attribute */
 1036                                 nfp->f_size = iep->ie_fsize;
 1037                                 nfp->f_allocated = iep->ie_fallocated;
 1038                                 nfp->f_flag |= FN_PRELOADED;
 1039                         } else {
 1040                                 error = ntfs_filesize(ntmp, nfp,
 1041                                             &nfp->f_size, &nfp->f_allocated);
 1042                                 if (error) {
 1043                                         vput(nvp);
 1044                                         goto fail;
 1045                                 }
 1046                         }
 1047 
 1048                         nfp->f_flag &= ~FN_VALID;
 1049                         *vpp = nvp;
 1050                         goto fail;
 1051                 }
 1052 
 1053                 /* Dive if possible */
 1054                 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) {
 1055                         dprintf(("ntfs_ntlookupfile: diving\n"));
 1056 
 1057                         cn = *(cn_t *) (rdbuf + aoff +
 1058                                         iep->reclen - sizeof(cn_t));
 1059                         rdsize = blsize;
 1060 
 1061                         error = ntfs_readattr(ntmp, ip, NTFS_A_INDX, "$I30",
 1062                                         ntfs_cntob(cn), rdsize, rdbuf, NULL);
 1063                         if (error)
 1064                                 goto fail;
 1065 
 1066                         error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
 1067                                                 rdbuf, rdsize);
 1068                         if (error)
 1069                                 goto fail;
 1070 
 1071                         aoff = (((struct attr_indexalloc *) rdbuf)->ia_hdrsize +
 1072                                 0x18);
 1073                 } else if (fullscan && lookup_ctx) {
 1074                         cn = lookup_ctx->cn;
 1075                         aoff = lookup_ctx->aoff;
 1076                         rdsize = lookup_ctx->rdsize;
 1077 
 1078                         error = ntfs_readattr(ntmp, ip,
 1079                                 (cn == 0) ? NTFS_A_INDXROOT : NTFS_A_INDX,
 1080                                 "$I30", ntfs_cntob(cn), rdsize, rdbuf, NULL);
 1081                         if (error)
 1082                                 goto fail;
 1083                         
 1084                         if (cn != 0) {
 1085                                 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
 1086                                                 rdbuf, rdsize);
 1087                                 if (error)
 1088                                         goto fail;
 1089                         }
 1090 
 1091                         tctx = lookup_ctx;
 1092                         lookup_ctx = lookup_ctx->prev;
 1093                         FREE(tctx, M_TEMP);
 1094                 } else {
 1095                         dprintf(("ntfs_ntlookupfile: nowhere to dive :-(\n"));
 1096                         error = ENOENT;
 1097                         break;
 1098                 }
 1099         } while (1);
 1100 
 1101         /* perform full scan if no entry was found */
 1102         if (!fullscan && error == ENOENT) {
 1103                 fullscan = 1;
 1104                 cn = 0;         /* need zero, used by lookup_ctx */
 1105 
 1106                 ddprintf(("ntfs_ntlookupfile: fullscan performed for: %.*s\n",
 1107                         (int) fnamelen, fname));
 1108                 goto loop;
 1109         }
 1110 
 1111         dprintf(("finish\n"));
 1112 
 1113 fail:
 1114         if (attrname)
 1115                 FREE(attrname, M_TEMP);
 1116         if (lookup_ctx) {
 1117                 while(lookup_ctx) {
 1118                         tctx = lookup_ctx;
 1119                         lookup_ctx = lookup_ctx->prev;
 1120                         FREE(tctx, M_TEMP);
 1121                 }
 1122         }
 1123         ntfs_ntvattrrele(vap);
 1124         ntfs_ntput(ip);
 1125         free(rdbuf, M_TEMP);
 1126         return (error);
 1127 }
 1128 
 1129 /*
 1130  * Check if name type is permitted to show.
 1131  */
 1132 int
 1133 ntfs_isnamepermitted(
 1134                      struct ntfsmount * ntmp,
 1135                      struct attr_indexentry * iep)
 1136 {
 1137         if (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)
 1138                 return 1;
 1139 
 1140         switch (iep->ie_fnametype) {
 1141         case 2:
 1142                 ddprintf(("ntfs_isnamepermitted: skipped DOS name\n"));
 1143                 return 0;
 1144         case 0: case 1: case 3:
 1145                 return 1;
 1146         default:
 1147                 printf("ntfs_isnamepermitted: " \
 1148                        "WARNING! Unknown file name type: %d\n",
 1149                        iep->ie_fnametype);
 1150                 break;
 1151         }
 1152         return 0;
 1153 }
 1154 
 1155 /*
 1156  * Read ntfs dir like stream of attr_indexentry, not like btree of them.
 1157  * This is done by scanning $BITMAP:$I30 for busy clusters and reading them.
 1158  * Of course $INDEX_ROOT:$I30 is read before. Last read values are stored in
 1159  * fnode, so we can skip toward record number num almost immediately.
 1160  * Anyway this is rather slow routine. The problem is that we don't know
 1161  * how many records are there in $INDEX_ALLOCATION:$I30 block.
 1162  */
 1163 int
 1164 ntfs_ntreaddir(
 1165                struct ntfsmount * ntmp,
 1166                struct fnode * fp,
 1167                u_int32_t num,
 1168                struct attr_indexentry ** riepp)
 1169 {
 1170         struct ntnode  *ip = FTONT(fp);
 1171         struct ntvattr *vap = NULL;     /* IndexRoot attribute */
 1172         struct ntvattr *bmvap = NULL;   /* BitMap attribute */
 1173         struct ntvattr *iavap = NULL;   /* IndexAllocation attribute */
 1174         caddr_t         rdbuf;          /* Buffer to read directory's blocks  */
 1175         u_char         *bmp = NULL;     /* Bitmap */
 1176         u_int32_t       blsize;         /* Index allocation size (2048) */
 1177         u_int32_t       rdsize;         /* Length of data to read */
 1178         u_int32_t       attrnum;        /* Current attribute type */
 1179         u_int32_t       cpbl = 1;       /* Clusters per directory block */
 1180         u_int32_t       blnum;
 1181         struct attr_indexentry *iep;
 1182         int             error = ENOENT;
 1183         u_int32_t       aoff, cnum;
 1184 
 1185         dprintf(("ntfs_ntreaddir: read ino: %d, num: %d\n", ip->i_number, num));
 1186         error = ntfs_ntget(ip);
 1187         if (error)
 1188                 return (error);
 1189 
 1190         error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
 1191         if (error)
 1192                 return (ENOTDIR);
 1193 
 1194         if (fp->f_dirblbuf == NULL) {
 1195                 fp->f_dirblsz = vap->va_a_iroot->ir_size;
 1196                 fp->f_dirblbuf = (caddr_t) malloc(
 1197                        max(vap->va_datalen,fp->f_dirblsz), M_NTFSDIR, M_WAITOK);
 1198         }
 1199 
 1200         blsize = fp->f_dirblsz;
 1201         rdbuf = fp->f_dirblbuf;
 1202 
 1203         dprintf(("ntfs_ntreaddir: rdbuf: 0x%p, blsize: %d\n", rdbuf, blsize));
 1204 
 1205         if (vap->va_a_iroot->ir_flag & NTFS_IRFLAG_INDXALLOC) {
 1206                 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXBITMAP, "$I30",
 1207                                         0, &bmvap);
 1208                 if (error) {
 1209                         error = ENOTDIR;
 1210                         goto fail;
 1211                 }
 1212                 bmp = (u_char *) malloc(bmvap->va_datalen, M_TEMP, M_WAITOK);
 1213                 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 0,
 1214                                        bmvap->va_datalen, bmp, NULL);
 1215                 if (error)
 1216                         goto fail;
 1217 
 1218                 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDX, "$I30",
 1219                                         0, &iavap);
 1220                 if (error) {
 1221                         error = ENOTDIR;
 1222                         goto fail;
 1223                 }
 1224                 cpbl = ntfs_btocn(blsize + ntfs_cntob(1) - 1);
 1225                 dprintf(("ntfs_ntreaddir: indexalloc: %d, cpbl: %d\n",
 1226                          iavap->va_datalen, cpbl));
 1227         } else {
 1228                 dprintf(("ntfs_ntreadidir: w/o BitMap and IndexAllocation\n"));
 1229                 iavap = bmvap = NULL;
 1230                 bmp = NULL;
 1231         }
 1232 
 1233         /* Try use previous values */
 1234         if ((fp->f_lastdnum < num) && (fp->f_lastdnum != 0)) {
 1235                 attrnum = fp->f_lastdattr;
 1236                 aoff = fp->f_lastdoff;
 1237                 blnum = fp->f_lastdblnum;
 1238                 cnum = fp->f_lastdnum;
 1239         } else {
 1240                 attrnum = NTFS_A_INDXROOT;
 1241                 aoff = sizeof(struct attr_indexroot);
 1242                 blnum = 0;
 1243                 cnum = 0;
 1244         }
 1245 
 1246         do {
 1247                 dprintf(("ntfs_ntreaddir: scan: 0x%x, %d, %d, %d, %d\n",
 1248                          attrnum, (u_int32_t) blnum, cnum, num, aoff));
 1249                 rdsize = (attrnum == NTFS_A_INDXROOT) ? vap->va_datalen : blsize;
 1250                 error = ntfs_readattr(ntmp, ip, attrnum, "$I30",
 1251                                 ntfs_cntob(blnum * cpbl), rdsize, rdbuf, NULL);
 1252                 if (error)
 1253                         goto fail;
 1254 
 1255                 if (attrnum == NTFS_A_INDX) {
 1256                         error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
 1257                                                 rdbuf, rdsize);
 1258                         if (error)
 1259                                 goto fail;
 1260                 }
 1261                 if (aoff == 0)
 1262                         aoff = (attrnum == NTFS_A_INDX) ?
 1263                                 (0x18 + ((struct attr_indexalloc *) rdbuf)->ia_hdrsize) :
 1264                                 sizeof(struct attr_indexroot);
 1265 
 1266                 iep = (struct attr_indexentry *) (rdbuf + aoff);
 1267                 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
 1268                         aoff += iep->reclen,
 1269                         iep = (struct attr_indexentry *) (rdbuf + aoff))
 1270                 {
 1271                         if (!ntfs_isnamepermitted(ntmp, iep)) continue;
 1272 
 1273                         if (cnum >= num) {
 1274                                 fp->f_lastdnum = cnum;
 1275                                 fp->f_lastdoff = aoff;
 1276                                 fp->f_lastdblnum = blnum;
 1277                                 fp->f_lastdattr = attrnum;
 1278 
 1279                                 *riepp = iep;
 1280 
 1281                                 error = 0;
 1282                                 goto fail;
 1283                         }
 1284                         cnum++;
 1285                 }
 1286 
 1287                 if (iavap) {
 1288                         if (attrnum == NTFS_A_INDXROOT)
 1289                                 blnum = 0;
 1290                         else
 1291                                 blnum++;
 1292 
 1293                         while (ntfs_cntob(blnum * cpbl) < iavap->va_datalen) {
 1294                                 if (bmp[blnum >> 3] & (1 << (blnum & 3)))
 1295                                         break;
 1296                                 blnum++;
 1297                         }
 1298 
 1299                         attrnum = NTFS_A_INDX;
 1300                         aoff = 0;
 1301                         if (ntfs_cntob(blnum * cpbl) >= iavap->va_datalen)
 1302                                 break;
 1303                         dprintf(("ntfs_ntreaddir: blnum: %d\n", (u_int32_t) blnum));
 1304                 }
 1305         } while (iavap);
 1306 
 1307         *riepp = NULL;
 1308         fp->f_lastdnum = 0;
 1309 
 1310 fail:
 1311         if (vap)
 1312                 ntfs_ntvattrrele(vap);
 1313         if (bmvap)
 1314                 ntfs_ntvattrrele(bmvap);
 1315         if (iavap)
 1316                 ntfs_ntvattrrele(iavap);
 1317         if (bmp)
 1318                 FREE(bmp, M_TEMP);
 1319         ntfs_ntput(ip);
 1320         return (error);
 1321 }
 1322 
 1323 /*
 1324  * Convert NTFS times that are in 100 ns units and begins from
 1325  * 1601 Jan 1 into unix times.
 1326  */
 1327 struct timespec
 1328 ntfs_nttimetounix(
 1329                   u_int64_t nt)
 1330 {
 1331         struct timespec t;
 1332 
 1333         /* WindowNT times are in 100 ns and from 1601 Jan 1 */
 1334         t.tv_nsec = (nt % (1000 * 1000 * 10)) * 100;
 1335         t.tv_sec = nt / (1000 * 1000 * 10) -
 1336                 369LL * 365LL * 24LL * 60LL * 60LL -
 1337                 89LL * 1LL * 24LL * 60LL * 60LL;
 1338         return (t);
 1339 }
 1340 
 1341 /*
 1342  * Get file times from NTFS_A_NAME attribute.
 1343  */
 1344 int
 1345 ntfs_times(
 1346            struct ntfsmount * ntmp,
 1347            struct ntnode * ip,
 1348            ntfs_times_t * tm)
 1349 {
 1350         struct ntvattr *vap;
 1351         int             error;
 1352 
 1353         dprintf(("ntfs_times: ino: %d...\n", ip->i_number));
 1354 
 1355         error = ntfs_ntget(ip);
 1356         if (error)
 1357                 return (error);
 1358 
 1359         error = ntfs_ntvattrget(ntmp, ip, NTFS_A_NAME, NULL, 0, &vap);
 1360         if (error) {
 1361                 ntfs_ntput(ip);
 1362                 return (error);
 1363         }
 1364         *tm = vap->va_a_name->n_times;
 1365         ntfs_ntvattrrele(vap);
 1366         ntfs_ntput(ip);
 1367 
 1368         return (0);
 1369 }
 1370 
 1371 /*
 1372  * Get file sizes from corresponding attribute. 
 1373  * 
 1374  * ntnode under fnode should be locked.
 1375  */
 1376 int
 1377 ntfs_filesize(
 1378               struct ntfsmount * ntmp,
 1379               struct fnode * fp,
 1380               u_int64_t * size,
 1381               u_int64_t * bytes)
 1382 {
 1383         struct ntvattr *vap;
 1384         struct ntnode *ip = FTONT(fp);
 1385         u_int64_t       sz, bn;
 1386         int             error;
 1387 
 1388         dprintf(("ntfs_filesize: ino: %d\n", ip->i_number));
 1389 
 1390         error = ntfs_ntvattrget(ntmp, ip,
 1391                 fp->f_attrtype, fp->f_attrname, 0, &vap);
 1392         if (error)
 1393                 return (error);
 1394 
 1395         bn = vap->va_allocated;
 1396         sz = vap->va_datalen;
 1397 
 1398         dprintf(("ntfs_filesize: %d bytes (%d bytes allocated)\n",
 1399                 (u_int32_t) sz, (u_int32_t) bn));
 1400 
 1401         if (size)
 1402                 *size = sz;
 1403         if (bytes)
 1404                 *bytes = bn;
 1405 
 1406         ntfs_ntvattrrele(vap);
 1407 
 1408         return (0);
 1409 }
 1410 
 1411 /*
 1412  * This is one of write routine.
 1413  */
 1414 int
 1415 ntfs_writeattr_plain(
 1416         struct ntfsmount * ntmp,
 1417         struct ntnode * ip,
 1418         u_int32_t attrnum,      
 1419         char *attrname,
 1420         off_t roff,
 1421         size_t rsize,
 1422         void *rdata,
 1423         size_t * initp,
 1424         struct uio *uio)
 1425 {
 1426         size_t          init;
 1427         int             error = 0;
 1428         off_t           off = roff, left = rsize, towrite;
 1429         caddr_t         data = rdata;
 1430         struct ntvattr *vap;
 1431         *initp = 0;
 1432 
 1433         while (left) {
 1434                 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
 1435                                         ntfs_btocn(off), &vap);
 1436                 if (error)
 1437                         return (error);
 1438                 towrite = min(left, ntfs_cntob(vap->va_vcnend + 1) - off);
 1439                 ddprintf(("ntfs_writeattr_plain: o: %d, s: %d (%d - %d)\n",
 1440                          (u_int32_t) off, (u_int32_t) towrite,
 1441                          (u_int32_t) vap->va_vcnstart,
 1442                          (u_int32_t) vap->va_vcnend));
 1443                 error = ntfs_writentvattr_plain(ntmp, ip, vap,
 1444                                          off - ntfs_cntob(vap->va_vcnstart),
 1445                                          towrite, data, &init, uio);
 1446                 if (error) {
 1447                         dprintf(("ntfs_writeattr_plain: " \
 1448                                "ntfs_writentvattr_plain failed: o: %d, s: %d\n",
 1449                                (u_int32_t) off, (u_int32_t) towrite));
 1450                         dprintf(("ntfs_writeattr_plain: attrib: %d - %d\n",
 1451                                (u_int32_t) vap->va_vcnstart, 
 1452                                (u_int32_t) vap->va_vcnend));
 1453                         ntfs_ntvattrrele(vap);
 1454                         break;
 1455                 }
 1456                 ntfs_ntvattrrele(vap);
 1457                 left -= towrite;
 1458                 off += towrite;
 1459                 data = data + towrite;
 1460                 *initp += init;
 1461         }
 1462 
 1463         return (error);
 1464 }
 1465 
 1466 /*
 1467  * This is one of write routine.
 1468  *
 1469  * ntnode should be locked.
 1470  */
 1471 int
 1472 ntfs_writentvattr_plain(
 1473         struct ntfsmount * ntmp,
 1474         struct ntnode * ip,
 1475         struct ntvattr * vap,
 1476         off_t roff,
 1477         size_t rsize,
 1478         void *rdata,
 1479         size_t * initp,
 1480         struct uio *uio)
 1481 {
 1482         int             error = 0;
 1483         int             off;
 1484         int             cnt;
 1485         cn_t            ccn, ccl, cn, left, cl;
 1486         caddr_t         data = rdata;
 1487         struct buf     *bp;
 1488         size_t          tocopy;
 1489 
 1490         *initp = 0;
 1491 
 1492         if ((vap->va_flag & NTFS_AF_INRUN) == 0) {
 1493                 dprintf(("ntfs_writevattr_plain: CAN'T WRITE RES. ATTRIBUTE\n"));
 1494                 return ENOTTY;
 1495         }
 1496 
 1497         ddprintf(("ntfs_writentvattr_plain: data in run: %lu chains\n",
 1498                  vap->va_vruncnt));
 1499 
 1500         off = roff;
 1501         left = rsize;
 1502         ccl = 0;
 1503         ccn = 0;
 1504         cnt = 0;
 1505         for (; left && (cnt < vap->va_vruncnt); cnt++) {
 1506                 ccn = vap->va_vruncn[cnt];
 1507                 ccl = vap->va_vruncl[cnt];
 1508 
 1509                 ddprintf(("ntfs_writentvattr_plain: " \
 1510                          "left %d, cn: 0x%x, cl: %d, off: %d\n", \
 1511                          (u_int32_t) left, (u_int32_t) ccn, \
 1512                          (u_int32_t) ccl, (u_int32_t) off));
 1513 
 1514                 if (ntfs_cntob(ccl) < off) {
 1515                         off -= ntfs_cntob(ccl);
 1516                         cnt++;
 1517                         continue;
 1518                 }
 1519                 if (!ccn && ip->i_number != NTFS_BOOTINO)
 1520                         continue; /* XXX */
 1521 
 1522                 ccl -= ntfs_btocn(off);
 1523                 cn = ccn + ntfs_btocn(off);
 1524                 off = ntfs_btocnoff(off);
 1525 
 1526                 while (left && ccl) {
 1527                         tocopy = min(left,
 1528                                   min(ntfs_cntob(ccl) - off, MAXBSIZE - off));
 1529                         cl = ntfs_btocl(tocopy + off);
 1530                         ddprintf(("ntfs_writentvattr_plain: write: " \
 1531                                 "cn: 0x%x cl: %d, off: %d len: %d, left: %d\n",
 1532                                 (u_int32_t) cn, (u_int32_t) cl, 
 1533                                 (u_int32_t) off, (u_int32_t) tocopy, 
 1534                                 (u_int32_t) left));
 1535                         if ((off == 0) && (tocopy == ntfs_cntob(cl)))
 1536                         {
 1537                                 bp = getblk(ntmp->ntm_devvp, ntfs_cntobn(cn),
 1538                                             ntfs_cntob(cl), 0, 0);
 1539                                 clrbuf(bp);
 1540                         } else {
 1541                                 error = bread(ntmp->ntm_devvp, ntfs_cntobn(cn),
 1542                                               ntfs_cntob(cl), NOCRED, &bp);
 1543                                 if (error) {
 1544                                         brelse(bp);
 1545                                         return (error);
 1546                                 }
 1547                         }
 1548                         if (uio)
 1549                                 uiomove(bp->b_data + off, tocopy, uio);
 1550                         else
 1551                                 memcpy(bp->b_data + off, data, tocopy);
 1552                         bawrite(bp);
 1553                         data = data + tocopy;
 1554                         *initp += tocopy;
 1555                         off = 0;
 1556                         left -= tocopy;
 1557                         cn += cl;
 1558                         ccl -= cl;
 1559                 }
 1560         }
 1561 
 1562         if (left) {
 1563                 printf("ntfs_writentvattr_plain: POSSIBLE RUN ERROR\n");
 1564                 error = EINVAL;
 1565         }
 1566 
 1567         return (error);
 1568 }
 1569 
 1570 /*
 1571  * This is one of read routines.
 1572  *
 1573  * ntnode should be locked.
 1574  */
 1575 int
 1576 ntfs_readntvattr_plain(
 1577         struct ntfsmount * ntmp,
 1578         struct ntnode * ip,
 1579         struct ntvattr * vap,
 1580         off_t roff,
 1581         size_t rsize,
 1582         void *rdata,
 1583         size_t * initp,
 1584         struct uio *uio)
 1585 {
 1586         int             error = 0;
 1587         int             off;
 1588 
 1589         *initp = 0;
 1590         if (vap->va_flag & NTFS_AF_INRUN) {
 1591                 int             cnt;
 1592                 cn_t            ccn, ccl, cn, left, cl;
 1593                 caddr_t         data = rdata;
 1594                 struct buf     *bp;
 1595                 size_t          tocopy;
 1596 
 1597                 ddprintf(("ntfs_readntvattr_plain: data in run: %lu chains\n",
 1598                          vap->va_vruncnt));
 1599 
 1600                 off = roff;
 1601                 left = rsize;
 1602                 ccl = 0;
 1603                 ccn = 0;
 1604                 cnt = 0;
 1605                 while (left && (cnt < vap->va_vruncnt)) {
 1606                         ccn = vap->va_vruncn[cnt];
 1607                         ccl = vap->va_vruncl[cnt];
 1608 
 1609                         ddprintf(("ntfs_readntvattr_plain: " \
 1610                                  "left %d, cn: 0x%x, cl: %d, off: %d\n", \
 1611                                  (u_int32_t) left, (u_int32_t) ccn, \
 1612                                  (u_int32_t) ccl, (u_int32_t) off));
 1613 
 1614                         if (ntfs_cntob(ccl) < off) {
 1615                                 off -= ntfs_cntob(ccl);
 1616                                 cnt++;
 1617                                 continue;
 1618                         }
 1619                         if (ccn || ip->i_number == NTFS_BOOTINO) {
 1620                                 ccl -= ntfs_btocn(off);
 1621                                 cn = ccn + ntfs_btocn(off);
 1622                                 off = ntfs_btocnoff(off);
 1623 
 1624                                 while (left && ccl) {
 1625                                         tocopy = min(left,
 1626                                                   min(ntfs_cntob(ccl) - off,
 1627                                                       MAXBSIZE - off));
 1628                                         cl = ntfs_btocl(tocopy + off);
 1629 
 1630                                         /*
 1631                                          * If 'off' pushes us to next
 1632                                          * block, don't attempt to read whole
 1633                                          * 'tocopy' at once. This is to avoid
 1634                                          * bread() with varying 'size' for
 1635                                          * same 'blkno', which is not good.
 1636                                          */
 1637                                         if (cl > ntfs_btocl(tocopy)) {
 1638                                                 tocopy -=
 1639                                                     ntfs_btocnoff(tocopy + off);
 1640                                                 cl--;
 1641                                         }
 1642 
 1643                                         ddprintf(("ntfs_readntvattr_plain: " \
 1644                                                 "read: cn: 0x%x cl: %d, " \
 1645                                                 "off: %d len: %d, left: %d\n",
 1646                                                 (u_int32_t) cn, 
 1647                                                 (u_int32_t) cl, 
 1648                                                 (u_int32_t) off, 
 1649                                                 (u_int32_t) tocopy, 
 1650                                                 (u_int32_t) left));
 1651                                         error = bread(ntmp->ntm_devvp,
 1652                                                       ntfs_cntobn(cn),
 1653                                                       ntfs_cntob(cl),
 1654                                                       NOCRED, &bp);
 1655                                         if (error) {
 1656                                                 brelse(bp);
 1657                                                 return (error);
 1658                                         }
 1659                                         if (uio) {
 1660                                                 uiomove(bp->b_data + off,
 1661                                                         tocopy, uio);
 1662                                         } else {
 1663                                                 memcpy(data, bp->b_data + off,
 1664                                                         tocopy);
 1665                                         }
 1666                                         brelse(bp);
 1667                                         data = data + tocopy;
 1668                                         *initp += tocopy;
 1669                                         off = 0;
 1670                                         left -= tocopy;
 1671                                         cn += cl;
 1672                                         ccl -= cl;
 1673                                 }
 1674                         } else {
 1675                                 tocopy = min(left, ntfs_cntob(ccl) - off);
 1676                                 ddprintf(("ntfs_readntvattr_plain: "
 1677                                         "hole: ccn: 0x%x ccl: %d, off: %d, " \
 1678                                         " len: %d, left: %d\n", 
 1679                                         (u_int32_t) ccn, (u_int32_t) ccl, 
 1680                                         (u_int32_t) off, (u_int32_t) tocopy, 
 1681                                         (u_int32_t) left));
 1682                                 left -= tocopy;
 1683                                 off = 0;
 1684                                 if (uio) {
 1685                                         size_t remains = tocopy;
 1686                                         for(; remains; remains--)
 1687                                                 uiomove("", 1, uio);
 1688                                 } else 
 1689                                         bzero(data, tocopy);
 1690                                 data = data + tocopy;
 1691                         }
 1692                         cnt++;
 1693                 }
 1694                 if (left) {
 1695                         printf("ntfs_readntvattr_plain: POSSIBLE RUN ERROR\n");
 1696                         error = E2BIG;
 1697                 }
 1698         } else {
 1699                 ddprintf(("ntfs_readnvattr_plain: data is in mft record\n"));
 1700                 if (uio) 
 1701                         uiomove(vap->va_datap + roff, rsize, uio);
 1702                 else
 1703                         memcpy(rdata, vap->va_datap + roff, rsize);
 1704                 *initp += rsize;
 1705         }
 1706 
 1707         return (error);
 1708 }
 1709 
 1710 /*
 1711  * This is one of read routines.
 1712  */
 1713 int
 1714 ntfs_readattr_plain(
 1715         struct ntfsmount * ntmp,
 1716         struct ntnode * ip,
 1717         u_int32_t attrnum,      
 1718         char *attrname,
 1719         off_t roff,
 1720         size_t rsize,
 1721         void *rdata,
 1722         size_t * initp,
 1723         struct uio *uio)
 1724 {
 1725         size_t          init;
 1726         int             error = 0;
 1727         off_t           off = roff, left = rsize, toread;
 1728         caddr_t         data = rdata;
 1729         struct ntvattr *vap;
 1730         *initp = 0;
 1731 
 1732         while (left) {
 1733                 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
 1734                                         ntfs_btocn(off), &vap);
 1735                 if (error)
 1736                         return (error);
 1737                 toread = min(left, ntfs_cntob(vap->va_vcnend + 1) - off);
 1738                 ddprintf(("ntfs_readattr_plain: o: %d, s: %d (%d - %d)\n",
 1739                          (u_int32_t) off, (u_int32_t) toread,
 1740                          (u_int32_t) vap->va_vcnstart,
 1741                          (u_int32_t) vap->va_vcnend));
 1742                 error = ntfs_readntvattr_plain(ntmp, ip, vap,
 1743                                          off - ntfs_cntob(vap->va_vcnstart),
 1744                                          toread, data, &init, uio);
 1745                 if (error) {
 1746                         printf("ntfs_readattr_plain: " \
 1747                                "ntfs_readntvattr_plain failed: o: %d, s: %d\n",
 1748                                (u_int32_t) off, (u_int32_t) toread);
 1749                         printf("ntfs_readattr_plain: attrib: %d - %d\n",
 1750                                (u_int32_t) vap->va_vcnstart, 
 1751                                (u_int32_t) vap->va_vcnend);
 1752                         ntfs_ntvattrrele(vap);
 1753                         break;
 1754                 }
 1755                 ntfs_ntvattrrele(vap);
 1756                 left -= toread;
 1757                 off += toread;
 1758                 data = data + toread;
 1759                 *initp += init;
 1760         }
 1761 
 1762         return (error);
 1763 }
 1764 
 1765 /*
 1766  * This is one of read routines.
 1767  */
 1768 int
 1769 ntfs_readattr(
 1770         struct ntfsmount * ntmp,
 1771         struct ntnode * ip,
 1772         u_int32_t attrnum,
 1773         char *attrname,
 1774         off_t roff,
 1775         size_t rsize,
 1776         void *rdata,
 1777         struct uio *uio)
 1778 {
 1779         int             error = 0;
 1780         struct ntvattr *vap;
 1781         size_t          init;
 1782 
 1783         ddprintf(("ntfs_readattr: reading %d: 0x%x, from %d size %d bytes\n",
 1784                ip->i_number, attrnum, (u_int32_t) roff, (u_int32_t) rsize));
 1785 
 1786         error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 0, &vap);
 1787         if (error)
 1788                 return (error);
 1789 
 1790         if ((roff > vap->va_datalen) ||
 1791             (roff + rsize > vap->va_datalen)) {
 1792                 printf("ntfs_readattr: offset too big: %ld (%ld) > %ld\n",
 1793                         (long int) roff, (long int) roff + rsize,
 1794                         (long int) vap->va_datalen);
 1795                 ntfs_ntvattrrele(vap);
 1796                 return (E2BIG);
 1797         }
 1798         if (vap->va_compression && vap->va_compressalg) {
 1799                 u_int8_t       *cup;
 1800                 u_int8_t       *uup;
 1801                 off_t           off = roff, left = rsize, tocopy;
 1802                 caddr_t         data = rdata;
 1803                 cn_t            cn;
 1804 
 1805                 ddprintf(("ntfs_ntreadattr: compression: %d\n",
 1806                          vap->va_compressalg));
 1807 
 1808                 MALLOC(cup, u_int8_t *, ntfs_cntob(NTFS_COMPUNIT_CL),
 1809                        M_NTFSDECOMP, M_WAITOK);
 1810                 MALLOC(uup, u_int8_t *, ntfs_cntob(NTFS_COMPUNIT_CL),
 1811                        M_NTFSDECOMP, M_WAITOK);
 1812 
 1813                 cn = (ntfs_btocn(roff)) & (~(NTFS_COMPUNIT_CL - 1));
 1814                 off = roff - ntfs_cntob(cn);
 1815 
 1816                 while (left) {
 1817                         error = ntfs_readattr_plain(ntmp, ip, attrnum,
 1818                                                   attrname, ntfs_cntob(cn),
 1819                                                   ntfs_cntob(NTFS_COMPUNIT_CL),
 1820                                                   cup, &init, NULL);
 1821                         if (error)
 1822                                 break;
 1823 
 1824                         tocopy = min(left, ntfs_cntob(NTFS_COMPUNIT_CL) - off);
 1825 
 1826                         if (init == ntfs_cntob(NTFS_COMPUNIT_CL)) {
 1827                                 if (uio)
 1828                                         uiomove(cup + off, tocopy, uio);
 1829                                 else
 1830                                         memcpy(data, cup + off, tocopy);
 1831                         } else if (init == 0) {
 1832                                 if (uio) {
 1833                                         size_t remains = tocopy;
 1834                                         for(; remains; remains--)
 1835                                                 uiomove("", 1, uio);
 1836                                 }
 1837                                 else
 1838                                         bzero(data, tocopy);
 1839                         } else {
 1840                                 error = ntfs_uncompunit(ntmp, uup, cup);
 1841                                 if (error)
 1842                                         break;
 1843                                 if (uio)
 1844                                         uiomove(uup + off, tocopy, uio);
 1845                                 else
 1846                                         memcpy(data, uup + off, tocopy);
 1847                         }
 1848 
 1849                         left -= tocopy;
 1850                         data = data + tocopy;
 1851                         off += tocopy - ntfs_cntob(NTFS_COMPUNIT_CL);
 1852                         cn += NTFS_COMPUNIT_CL;
 1853                 }
 1854 
 1855                 FREE(uup, M_NTFSDECOMP);
 1856                 FREE(cup, M_NTFSDECOMP);
 1857         } else
 1858                 error = ntfs_readattr_plain(ntmp, ip, attrnum, attrname,
 1859                                              roff, rsize, rdata, &init, uio);
 1860         ntfs_ntvattrrele(vap);
 1861         return (error);
 1862 }
 1863 
 1864 #if UNUSED_CODE
 1865 int
 1866 ntfs_parserun(
 1867               cn_t * cn,
 1868               cn_t * cl,
 1869               u_int8_t * run,
 1870               u_long len,
 1871               u_long *off)
 1872 {
 1873         u_int8_t        sz;
 1874         int             i;
 1875 
 1876         if (NULL == run) {
 1877                 printf("ntfs_parsetun: run == NULL\n");
 1878                 return (EINVAL);
 1879         }
 1880         sz = run[(*off)++];
 1881         if (0 == sz) {
 1882                 printf("ntfs_parserun: trying to go out of run\n");
 1883                 return (E2BIG);
 1884         }
 1885         *cl = 0;
 1886         if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
 1887                 printf("ntfs_parserun: " \
 1888                        "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
 1889                        sz, len, *off);
 1890                 return (EINVAL);
 1891         }
 1892         for (i = 0; i < (sz & 0xF); i++)
 1893                 *cl += (u_int32_t) run[(*off)++] << (i << 3);
 1894 
 1895         sz >>= 4;
 1896         if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
 1897                 printf("ntfs_parserun: " \
 1898                        "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
 1899                        sz, len, *off);
 1900                 return (EINVAL);
 1901         }
 1902         for (i = 0; i < (sz & 0xF); i++)
 1903                 *cn += (u_int32_t) run[(*off)++] << (i << 3);
 1904 
 1905         return (0);
 1906 }
 1907 #endif
 1908 
 1909 /*
 1910  * Process fixup routine on given buffer.
 1911  */
 1912 int
 1913 ntfs_procfixups(
 1914                 struct ntfsmount * ntmp,
 1915                 u_int32_t magic,
 1916                 caddr_t buf,
 1917                 size_t len)
 1918 {
 1919         struct fixuphdr *fhp = (struct fixuphdr *) buf;
 1920         int             i;
 1921         u_int16_t       fixup;
 1922         u_int16_t      *fxp;
 1923         u_int16_t      *cfxp;
 1924 
 1925         if (fhp->fh_magic != magic) {
 1926                 printf("ntfs_procfixups: magic doesn't match: %08x != %08x\n",
 1927                        fhp->fh_magic, magic);
 1928                 return (EINVAL);
 1929         }
 1930         if ((fhp->fh_fnum - 1) * ntmp->ntm_bps != len) {
 1931                 printf("ntfs_procfixups: " \
 1932                        "bad fixups number: %d for %ld bytes block\n", 
 1933                        fhp->fh_fnum, (long)len);        /* XXX printf kludge */
 1934                 return (EINVAL);
 1935         }
 1936         if (fhp->fh_foff >= ntmp->ntm_spc * ntmp->ntm_mftrecsz * ntmp->ntm_bps) {
 1937                 printf("ntfs_procfixups: invalid offset: %x", fhp->fh_foff);
 1938                 return (EINVAL);
 1939         }
 1940         fxp = (u_int16_t *) (buf + fhp->fh_foff);
 1941         cfxp = (u_int16_t *) (buf + ntmp->ntm_bps - 2);
 1942         fixup = *fxp++;
 1943         for (i = 1; i < fhp->fh_fnum; i++, fxp++) {
 1944                 if (*cfxp != fixup) {
 1945                         printf("ntfs_procfixups: fixup %d doesn't match\n", i);
 1946                         return (EINVAL);
 1947                 }
 1948                 *cfxp = *fxp;
 1949                 ((caddr_t) cfxp) += ntmp->ntm_bps;
 1950         }
 1951         return (0);
 1952 }
 1953 
 1954 #if UNUSED_CODE
 1955 int
 1956 ntfs_runtocn(
 1957              cn_t * cn, 
 1958              struct ntfsmount * ntmp,
 1959              u_int8_t * run,
 1960              u_long len,
 1961              cn_t vcn)
 1962 {
 1963         cn_t            ccn = 0;
 1964         cn_t            ccl = 0;
 1965         u_long          off = 0;
 1966         int             error = 0;
 1967 
 1968 #if NTFS_DEBUG
 1969         int             i;
 1970         printf("ntfs_runtocn: run: 0x%p, %ld bytes, vcn:%ld\n",
 1971                 run, len, (u_long) vcn);
 1972         printf("ntfs_runtocn: run: ");
 1973         for (i = 0; i < len; i++)
 1974                 printf("0x%02x ", run[i]);
 1975         printf("\n");
 1976 #endif
 1977 
 1978         if (NULL == run) {
 1979                 printf("ntfs_runtocn: run == NULL\n");
 1980                 return (EINVAL);
 1981         }
 1982         do {
 1983                 if (run[off] == 0) {
 1984                         printf("ntfs_runtocn: vcn too big\n");
 1985                         return (E2BIG);
 1986                 }
 1987                 vcn -= ccl;
 1988                 error = ntfs_parserun(&ccn, &ccl, run, len, &off);
 1989                 if (error) {
 1990                         printf("ntfs_runtocn: ntfs_parserun failed\n");
 1991                         return (error);
 1992                 }
 1993         } while (ccl <= vcn);
 1994         *cn = ccn + vcn;
 1995         return (0);
 1996 }
 1997 #endif
 1998 
 1999 /*
 2000  * this initializes toupper table & dependant variables to be ready for
 2001  * later work
 2002  */
 2003 void
 2004 ntfs_toupper_init()
 2005 {
 2006         ntfs_toupper_tab = (wchar *) NULL;
 2007         lockinit(&ntfs_toupper_lock, PVFS, "ntfs_toupper", 0, 0);
 2008         ntfs_toupper_usecount = 0;
 2009 }
 2010 
 2011 /*
 2012  * if the ntfs_toupper_tab[] is filled already, just raise use count;
 2013  * otherwise read the data from the filesystem we are currently mounting
 2014  */
 2015 int
 2016 ntfs_toupper_use(mp, ntmp)
 2017         struct mount *mp;
 2018         struct ntfsmount *ntmp;
 2019 {
 2020         int error = 0;
 2021         struct vnode *vp;
 2022 
 2023         /* get exclusive access */
 2024         lockmgr(&ntfs_toupper_lock, LK_EXCLUSIVE, NULL);
 2025         
 2026         /* only read the translation data from a file if it hasn't been
 2027          * read already */
 2028         if (ntfs_toupper_tab)
 2029                 goto out;
 2030 
 2031         /*
 2032          * Read in Unicode lowercase -> uppercase translation file.
 2033          * XXX for now, just the first 256 entries are used anyway,
 2034          * so don't bother reading more
 2035          */
 2036         MALLOC(ntfs_toupper_tab, wchar *, 256 * 256 * sizeof(wchar),
 2037                 M_NTFSRDATA, M_WAITOK);
 2038 
 2039         if ((error = VFS_VGET(mp, NTFS_UPCASEINO, &vp)))
 2040                 goto out;
 2041         error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
 2042                         0, 256*256*sizeof(wchar), (char *) ntfs_toupper_tab,
 2043                         NULL);
 2044         vput(vp);
 2045 
 2046     out:
 2047         ntfs_toupper_usecount++;
 2048         lockmgr(&ntfs_toupper_lock, LK_RELEASE, NULL);
 2049         return (error);
 2050 }
 2051 
 2052 /*
 2053  * lower the use count and if it reaches zero, free the memory
 2054  * tied by toupper table
 2055  */
 2056 void
 2057 ntfs_toupper_unuse()
 2058 {
 2059         /* get exclusive access */
 2060         lockmgr(&ntfs_toupper_lock, LK_EXCLUSIVE, NULL);
 2061 
 2062         ntfs_toupper_usecount--;
 2063         if (ntfs_toupper_usecount == 0) {
 2064                 FREE(ntfs_toupper_tab, M_NTFSRDATA);
 2065                 ntfs_toupper_tab = NULL;
 2066         }
 2067 #ifdef DIAGNOSTIC
 2068         else if (ntfs_toupper_usecount < 0) {
 2069                 panic("ntfs_toupper_unuse(): use count negative: %d",
 2070                         ntfs_toupper_usecount);
 2071         }
 2072 #endif
 2073         
 2074         /* release the lock */
 2075         lockmgr(&ntfs_toupper_lock, LK_RELEASE, NULL);
 2076 } 

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