The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/fs/ntfs/ntfs_subr.c

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    1 /*      $NetBSD: ntfs_subr.c,v 1.23 1999/10/31 19:45:26 jdolecek Exp $  */
    2 
    3 /*-
    4  * Copyright (c) 1998, 1999 Semen Ustimenko (semenu@FreeBSD.org)
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  *
   28  * $FreeBSD: releng/8.0/sys/fs/ntfs/ntfs_subr.c 184214 2008-10-23 20:26:15Z des $
   29  */
   30 
   31 #include <sys/param.h>
   32 #include <sys/types.h>
   33 #include <sys/systm.h>
   34 #include <sys/namei.h>
   35 #include <sys/kernel.h>
   36 #include <sys/vnode.h>
   37 #include <sys/mount.h>
   38 #include <sys/bio.h>
   39 #include <sys/buf.h>
   40 #include <sys/file.h>
   41 #include <sys/malloc.h>
   42 #include <sys/lock.h>
   43 #include <sys/iconv.h>
   44 
   45 /* #define NTFS_DEBUG 1 */
   46 #include <fs/ntfs/ntfs.h>
   47 #include <fs/ntfs/ntfsmount.h>
   48 #include <fs/ntfs/ntfs_inode.h>
   49 #include <fs/ntfs/ntfs_vfsops.h>
   50 #include <fs/ntfs/ntfs_subr.h>
   51 #include <fs/ntfs/ntfs_compr.h>
   52 #include <fs/ntfs/ntfs_ihash.h>
   53 
   54 MALLOC_DEFINE(M_NTFSNTVATTR, "ntfs_vattr", "NTFS file attribute information");
   55 MALLOC_DEFINE(M_NTFSRDATA, "ntfsd_resdata", "NTFS resident data");
   56 MALLOC_DEFINE(M_NTFSRUN, "ntfs_vrun", "NTFS vrun storage");
   57 MALLOC_DEFINE(M_NTFSDECOMP, "ntfs_decomp", "NTFS decompression temporary");
   58 
   59 static int ntfs_ntlookupattr(struct ntfsmount *, const char *, int, int *, char **);
   60 static int ntfs_findvattr(struct ntfsmount *, struct ntnode *, struct ntvattr **, struct ntvattr **, u_int32_t, const char *, size_t, cn_t);
   61 static int ntfs_uastricmp(struct ntfsmount *, const wchar *, size_t, const char *, size_t);
   62 static int ntfs_uastrcmp(struct ntfsmount *, const wchar *, size_t, const char *, size_t);
   63 
   64 /* table for mapping Unicode chars into uppercase; it's filled upon first
   65  * ntfs mount, freed upon last ntfs umount */
   66 static wchar *ntfs_toupper_tab;
   67 #define NTFS_TOUPPER(ch)        (ntfs_toupper_tab[(ch)])
   68 static struct lock ntfs_toupper_lock;
   69 static signed int ntfs_toupper_usecount;
   70 
   71 struct iconv_functions *ntfs_iconv = NULL;
   72 
   73 /* support macro for ntfs_ntvattrget() */
   74 #define NTFS_AALPCMP(aalp,type,name,namelen) (                          \
   75   (aalp->al_type == type) && (aalp->al_namelen == namelen) &&           \
   76   !NTFS_UASTRCMP(aalp->al_name,aalp->al_namelen,name,namelen) )
   77 
   78 /*
   79  * 
   80  */
   81 int
   82 ntfs_ntvattrrele(vap)
   83         struct ntvattr * vap;
   84 {
   85         dprintf(("ntfs_ntvattrrele: ino: %d, type: 0x%x\n",
   86                  vap->va_ip->i_number, vap->va_type));
   87 
   88         ntfs_ntrele(vap->va_ip);
   89 
   90         return (0);
   91 }
   92 
   93 /*
   94  * find the attribute in the ntnode
   95  */
   96 static int
   97 ntfs_findvattr(ntmp, ip, lvapp, vapp, type, name, namelen, vcn)
   98         struct ntfsmount *ntmp;
   99         struct ntnode *ip;
  100         struct ntvattr **lvapp, **vapp;
  101         u_int32_t type;
  102         const char *name;
  103         size_t namelen;
  104         cn_t vcn;
  105 {
  106         int error;
  107         struct ntvattr *vap;
  108 
  109         if((ip->i_flag & IN_LOADED) == 0) {
  110                 dprintf(("ntfs_findvattr: node not loaded, ino: %d\n",
  111                        ip->i_number));
  112                 error = ntfs_loadntnode(ntmp,ip);
  113                 if (error) {
  114                         printf("ntfs_findvattr: FAILED TO LOAD INO: %d\n",
  115                                ip->i_number);
  116                         return (error);
  117                 }
  118         }
  119 
  120         *lvapp = NULL;
  121         *vapp = NULL;
  122         LIST_FOREACH(vap, &ip->i_valist, va_list) {
  123                 ddprintf(("ntfs_findvattr: type: 0x%x, vcn: %d - %d\n", \
  124                           vap->va_type, (u_int32_t) vap->va_vcnstart, \
  125                           (u_int32_t) vap->va_vcnend));
  126                 if ((vap->va_type == type) &&
  127                     (vap->va_vcnstart <= vcn) && (vap->va_vcnend >= vcn) &&
  128                     (vap->va_namelen == namelen) &&
  129                     (strncmp(name, vap->va_name, namelen) == 0)) {
  130                         *vapp = vap;
  131                         ntfs_ntref(vap->va_ip);
  132                         return (0);
  133                 }
  134                 if (vap->va_type == NTFS_A_ATTRLIST)
  135                         *lvapp = vap;
  136         }
  137 
  138         return (-1);
  139 }
  140 
  141 /*
  142  * Search attribute specifed in ntnode (load ntnode if nessecary).
  143  * If not found but ATTR_A_ATTRLIST present, read it in and search throught.
  144  * VOP_VGET node needed, and lookup througth it's ntnode (load if nessesary).
  145  *
  146  * ntnode should be locked
  147  */
  148 int
  149 ntfs_ntvattrget(
  150                 struct ntfsmount * ntmp,
  151                 struct ntnode * ip,
  152                 u_int32_t type,
  153                 const char *name,
  154                 cn_t vcn,
  155                 struct ntvattr ** vapp)
  156 {
  157         struct ntvattr *lvap = NULL;
  158         struct attr_attrlist *aalp;
  159         struct attr_attrlist *nextaalp;
  160         struct vnode   *newvp;
  161         struct ntnode  *newip;
  162         caddr_t         alpool;
  163         size_t          namelen, len;
  164         int             error;
  165 
  166         *vapp = NULL;
  167 
  168         if (name) {
  169                 dprintf(("ntfs_ntvattrget: " \
  170                          "ino: %d, type: 0x%x, name: %s, vcn: %d\n", \
  171                          ip->i_number, type, name, (u_int32_t) vcn));
  172                 namelen = strlen(name);
  173         } else {
  174                 dprintf(("ntfs_ntvattrget: " \
  175                          "ino: %d, type: 0x%x, vcn: %d\n", \
  176                          ip->i_number, type, (u_int32_t) vcn));
  177                 name = "";
  178                 namelen = 0;
  179         }
  180 
  181         error = ntfs_findvattr(ntmp, ip, &lvap, vapp, type, name, namelen, vcn);
  182         if (error >= 0)
  183                 return (error);
  184 
  185         if (!lvap) {
  186                 dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: " \
  187                        "ino: %d, type: 0x%x, name: %s, vcn: %d\n", \
  188                        ip->i_number, type, name, (u_int32_t) vcn));
  189                 return (ENOENT);
  190         }
  191         /* Scan $ATTRIBUTE_LIST for requested attribute */
  192         len = lvap->va_datalen;
  193         alpool = malloc(len, M_TEMP, M_WAITOK);
  194         error = ntfs_readntvattr_plain(ntmp, ip, lvap, 0, len, alpool, &len,
  195                         NULL);
  196         if (error)
  197                 goto out;
  198 
  199         aalp = (struct attr_attrlist *) alpool;
  200         nextaalp = NULL;
  201 
  202         for(; len > 0; aalp = nextaalp) {
  203                 dprintf(("ntfs_ntvattrget: " \
  204                          "attrlist: ino: %d, attr: 0x%x, vcn: %d\n", \
  205                          aalp->al_inumber, aalp->al_type, \
  206                          (u_int32_t) aalp->al_vcnstart));
  207 
  208                 if (len > aalp->reclen) {
  209                         nextaalp = NTFS_NEXTREC(aalp, struct attr_attrlist *);
  210                 } else {
  211                         nextaalp = NULL;
  212                 }
  213                 len -= aalp->reclen;
  214 
  215                 if (!NTFS_AALPCMP(aalp, type, name, namelen) ||
  216                     (nextaalp && (nextaalp->al_vcnstart <= vcn) &&
  217                      NTFS_AALPCMP(nextaalp, type, name, namelen)))
  218                         continue;
  219 
  220                 dprintf(("ntfs_ntvattrget: attribute in ino: %d\n",
  221                                  aalp->al_inumber));
  222 
  223                 /* this is not a main record, so we can't use just plain
  224                    vget() */
  225                 error = ntfs_vgetex(ntmp->ntm_mountp, aalp->al_inumber,
  226                                 NTFS_A_DATA, NULL, LK_EXCLUSIVE,
  227                                 VG_EXT, curthread, &newvp);
  228                 if (error) {
  229                         printf("ntfs_ntvattrget: CAN'T VGET INO: %d\n",
  230                                aalp->al_inumber);
  231                         goto out;
  232                 }
  233                 newip = VTONT(newvp);
  234                 /* XXX have to lock ntnode */
  235                 error = ntfs_findvattr(ntmp, newip, &lvap, vapp,
  236                                 type, name, namelen, vcn);
  237                 vput(newvp);
  238                 if (error == 0)
  239                         goto out;
  240                 printf("ntfs_ntvattrget: ATTRLIST ERROR.\n");
  241                 break;
  242         }
  243         error = ENOENT;
  244 
  245         dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: " \
  246                "ino: %d, type: 0x%x, name: %.*s, vcn: %d\n", \
  247                ip->i_number, type, (int) namelen, name, (u_int32_t) vcn));
  248 out:
  249         free(alpool, M_TEMP);
  250         return (error);
  251 }
  252 
  253 /*
  254  * Read ntnode from disk, make ntvattr list.
  255  *
  256  * ntnode should be locked
  257  */
  258 int
  259 ntfs_loadntnode(
  260               struct ntfsmount * ntmp,
  261               struct ntnode * ip)
  262 {
  263         struct filerec  *mfrp;
  264         daddr_t         bn;
  265         int             error,off;
  266         struct attr    *ap;
  267         struct ntvattr *nvap;
  268 
  269         dprintf(("ntfs_loadntnode: loading ino: %d\n",ip->i_number));
  270 
  271         mfrp = malloc(ntfs_bntob(ntmp->ntm_bpmftrec),
  272                M_TEMP, M_WAITOK);
  273 
  274         if (ip->i_number < NTFS_SYSNODESNUM) {
  275                 struct buf     *bp;
  276 
  277                 dprintf(("ntfs_loadntnode: read system node\n"));
  278 
  279                 bn = ntfs_cntobn(ntmp->ntm_mftcn) +
  280                         ntmp->ntm_bpmftrec * ip->i_number;
  281 
  282                 error = bread(ntmp->ntm_devvp,
  283                               bn, ntfs_bntob(ntmp->ntm_bpmftrec),
  284                               NOCRED, &bp);
  285                 if (error) {
  286                         printf("ntfs_loadntnode: BREAD FAILED\n");
  287                         brelse(bp);
  288                         goto out;
  289                 }
  290                 memcpy(mfrp, bp->b_data, ntfs_bntob(ntmp->ntm_bpmftrec));
  291                 bqrelse(bp);
  292         } else {
  293                 struct vnode   *vp;
  294 
  295                 vp = ntmp->ntm_sysvn[NTFS_MFTINO];
  296                 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
  297                                ip->i_number * ntfs_bntob(ntmp->ntm_bpmftrec),
  298                                ntfs_bntob(ntmp->ntm_bpmftrec), mfrp, NULL);
  299                 if (error) {
  300                         printf("ntfs_loadntnode: ntfs_readattr failed\n");
  301                         goto out;
  302                 }
  303         }
  304 
  305         /* Check if magic and fixups are correct */
  306         error = ntfs_procfixups(ntmp, NTFS_FILEMAGIC, (caddr_t)mfrp,
  307                                 ntfs_bntob(ntmp->ntm_bpmftrec));
  308         if (error) {
  309                 printf("ntfs_loadntnode: BAD MFT RECORD %d\n",
  310                        (u_int32_t) ip->i_number);
  311                 goto out;
  312         }
  313 
  314         dprintf(("ntfs_loadntnode: load attrs for ino: %d\n",ip->i_number));
  315         off = mfrp->fr_attroff;
  316         ap = (struct attr *) ((caddr_t)mfrp + off);
  317 
  318         LIST_INIT(&ip->i_valist);
  319         
  320         while (ap->a_hdr.a_type != -1) {
  321                 error = ntfs_attrtontvattr(ntmp, &nvap, ap);
  322                 if (error)
  323                         break;
  324                 nvap->va_ip = ip;
  325 
  326                 LIST_INSERT_HEAD(&ip->i_valist, nvap, va_list);
  327 
  328                 off += ap->a_hdr.reclen;
  329                 ap = (struct attr *) ((caddr_t)mfrp + off);
  330         }
  331         if (error) {
  332                 printf("ntfs_loadntnode: failed to load attr ino: %d\n",
  333                        ip->i_number);
  334                 goto out;
  335         }
  336 
  337         ip->i_mainrec = mfrp->fr_mainrec;
  338         ip->i_nlink = mfrp->fr_nlink;
  339         ip->i_frflag = mfrp->fr_flags;
  340 
  341         ip->i_flag |= IN_LOADED;
  342 
  343 out:
  344         free(mfrp, M_TEMP);
  345         return (error);
  346 }
  347                 
  348 /*
  349  * Routine locks ntnode and increase usecount, just opposite of
  350  * ntfs_ntput().
  351  */
  352 int
  353 ntfs_ntget(ip)
  354         struct ntnode *ip;
  355 {
  356         dprintf(("ntfs_ntget: get ntnode %d: %p, usecount: %d\n",
  357                 ip->i_number, ip, ip->i_usecount));
  358 
  359         mtx_lock(&ip->i_interlock);
  360         ip->i_usecount++;
  361         lockmgr(&ip->i_lock, LK_EXCLUSIVE | LK_INTERLOCK, &ip->i_interlock);
  362 
  363         return 0;
  364 }
  365 
  366 /*
  367  * Routine search ntnode in hash, if found: lock, inc usecount and return.
  368  * If not in hash allocate structure for ntnode, prefill it, lock,
  369  * inc count and return.
  370  *
  371  * ntnode returned locked
  372  */
  373 int
  374 ntfs_ntlookup(
  375            struct ntfsmount * ntmp,
  376            ino_t ino,
  377            struct ntnode ** ipp)
  378 {
  379         struct ntnode  *ip;
  380 
  381         dprintf(("ntfs_ntlookup: looking for ntnode %d\n", ino));
  382 
  383         do {
  384                 ip = ntfs_nthashlookup(ntmp->ntm_devvp->v_rdev, ino);
  385                 if (ip != NULL) {
  386                         ntfs_ntget(ip);
  387                         dprintf(("ntfs_ntlookup: ntnode %d: %p, usecount: %d\n",
  388                                 ino, ip, ip->i_usecount));
  389                         *ipp = ip;
  390                         return (0);
  391                 }
  392         } while (lockmgr(&ntfs_hashlock, LK_EXCLUSIVE | LK_SLEEPFAIL, NULL));
  393 
  394         ip = malloc(sizeof(struct ntnode), M_NTFSNTNODE,
  395                 M_WAITOK | M_ZERO);
  396         ddprintf(("ntfs_ntlookup: allocating ntnode: %d: %p\n", ino, ip));
  397 
  398         /* Generic initialization */
  399         ip->i_devvp = ntmp->ntm_devvp;
  400         ip->i_dev = ntmp->ntm_devvp->v_rdev;
  401         ip->i_number = ino;
  402         ip->i_mp = ntmp;
  403 
  404         LIST_INIT(&ip->i_fnlist);
  405         VREF(ip->i_devvp);
  406 
  407         /* init lock and lock the newborn ntnode */
  408         lockinit(&ip->i_lock, PINOD, "ntnode", 0, 0);
  409         mtx_init(&ip->i_interlock, "ntnode interlock", NULL, MTX_DEF);
  410         ntfs_ntget(ip);
  411 
  412         ntfs_nthashins(ip);
  413 
  414         lockmgr(&ntfs_hashlock, LK_RELEASE, NULL);
  415 
  416         *ipp = ip;
  417 
  418         dprintf(("ntfs_ntlookup: ntnode %d: %p, usecount: %d\n",
  419                 ino, ip, ip->i_usecount));
  420 
  421         return (0);
  422 }
  423 
  424 /*
  425  * Decrement usecount of ntnode and unlock it, if usecount reach zero,
  426  * deallocate ntnode.
  427  *
  428  * ntnode should be locked on entry, and unlocked on return.
  429  */
  430 void
  431 ntfs_ntput(ip)
  432         struct ntnode *ip;
  433 {
  434         struct ntvattr *vap;
  435 
  436         dprintf(("ntfs_ntput: rele ntnode %d: %p, usecount: %d\n",
  437                 ip->i_number, ip, ip->i_usecount));
  438 
  439         mtx_lock(&ip->i_interlock);
  440         ip->i_usecount--;
  441 
  442 #ifdef DIAGNOSTIC
  443         if (ip->i_usecount < 0) {
  444                 panic("ntfs_ntput: ino: %d usecount: %d \n",
  445                       ip->i_number,ip->i_usecount);
  446         }
  447 #endif
  448 
  449         if (ip->i_usecount > 0) {
  450                 lockmgr(&ip->i_lock, LK_RELEASE|LK_INTERLOCK, &ip->i_interlock);
  451                 return;
  452         }
  453 
  454         dprintf(("ntfs_ntput: deallocating ntnode: %d\n", ip->i_number));
  455 
  456         if (LIST_FIRST(&ip->i_fnlist))
  457                 panic("ntfs_ntput: ntnode has fnodes\n");
  458 
  459         ntfs_nthashrem(ip);
  460 
  461         while ((vap = LIST_FIRST(&ip->i_valist)) != NULL) {
  462                 LIST_REMOVE(vap,va_list);
  463                 ntfs_freentvattr(vap);
  464         }
  465         lockmgr(&ip->i_lock, LK_RELEASE | LK_INTERLOCK, &ip->i_interlock);
  466         mtx_destroy(&ip->i_interlock);
  467         lockdestroy(&ip->i_lock);
  468         vrele(ip->i_devvp);
  469         free(ip, M_NTFSNTNODE);
  470 }
  471 
  472 /*
  473  * increment usecount of ntnode 
  474  */
  475 void
  476 ntfs_ntref(ip)
  477         struct ntnode *ip;
  478 {
  479         mtx_lock(&ip->i_interlock);
  480         ip->i_usecount++;
  481         mtx_unlock(&ip->i_interlock);
  482 
  483         dprintf(("ntfs_ntref: ino %d, usecount: %d\n",
  484                 ip->i_number, ip->i_usecount));
  485                         
  486 }
  487 
  488 /*
  489  * Decrement usecount of ntnode.
  490  */
  491 void
  492 ntfs_ntrele(ip)
  493         struct ntnode *ip;
  494 {
  495         dprintf(("ntfs_ntrele: rele ntnode %d: %p, usecount: %d\n",
  496                 ip->i_number, ip, ip->i_usecount));
  497 
  498         mtx_lock(&ip->i_interlock);
  499         ip->i_usecount--;
  500 
  501         if (ip->i_usecount < 0)
  502                 panic("ntfs_ntrele: ino: %d usecount: %d \n",
  503                       ip->i_number,ip->i_usecount);
  504         mtx_unlock(&ip->i_interlock);
  505 }
  506 
  507 /*
  508  * Deallocate all memory allocated for ntvattr
  509  */
  510 void
  511 ntfs_freentvattr(vap)
  512         struct ntvattr * vap;
  513 {
  514         if (vap->va_flag & NTFS_AF_INRUN) {
  515                 if (vap->va_vruncn)
  516                         free(vap->va_vruncn, M_NTFSRUN);
  517                 if (vap->va_vruncl)
  518                         free(vap->va_vruncl, M_NTFSRUN);
  519         } else {
  520                 if (vap->va_datap)
  521                         free(vap->va_datap, M_NTFSRDATA);
  522         }
  523         free(vap, M_NTFSNTVATTR);
  524 }
  525 
  526 /*
  527  * Convert disk image of attribute into ntvattr structure,
  528  * runs are expanded also.
  529  */
  530 int
  531 ntfs_attrtontvattr(
  532                    struct ntfsmount * ntmp,
  533                    struct ntvattr ** rvapp,
  534                    struct attr * rap)
  535 {
  536         int             error, i;
  537         struct ntvattr *vap;
  538 
  539         error = 0;
  540         *rvapp = NULL;
  541 
  542         vap = malloc(sizeof(struct ntvattr),
  543                 M_NTFSNTVATTR, M_WAITOK | M_ZERO);
  544         vap->va_ip = NULL;
  545         vap->va_flag = rap->a_hdr.a_flag;
  546         vap->va_type = rap->a_hdr.a_type;
  547         vap->va_compression = rap->a_hdr.a_compression;
  548         vap->va_index = rap->a_hdr.a_index;
  549 
  550         ddprintf(("type: 0x%x, index: %d", vap->va_type, vap->va_index));
  551 
  552         vap->va_namelen = rap->a_hdr.a_namelen;
  553         if (rap->a_hdr.a_namelen) {
  554                 wchar *unp = (wchar *) ((caddr_t) rap + rap->a_hdr.a_nameoff);
  555                 ddprintf((", name:["));
  556                 for (i = 0; i < vap->va_namelen; i++) {
  557                         vap->va_name[i] = unp[i];
  558                         ddprintf(("%c", vap->va_name[i]));
  559                 }
  560                 ddprintf(("]"));
  561         }
  562         if (vap->va_flag & NTFS_AF_INRUN) {
  563                 ddprintf((", nonres."));
  564                 vap->va_datalen = rap->a_nr.a_datalen;
  565                 vap->va_allocated = rap->a_nr.a_allocated;
  566                 vap->va_vcnstart = rap->a_nr.a_vcnstart;
  567                 vap->va_vcnend = rap->a_nr.a_vcnend;
  568                 vap->va_compressalg = rap->a_nr.a_compressalg;
  569                 error = ntfs_runtovrun(&(vap->va_vruncn), &(vap->va_vruncl),
  570                                        &(vap->va_vruncnt),
  571                                        (caddr_t) rap + rap->a_nr.a_dataoff);
  572         } else {
  573                 vap->va_compressalg = 0;
  574                 ddprintf((", res."));
  575                 vap->va_datalen = rap->a_r.a_datalen;
  576                 vap->va_allocated = rap->a_r.a_datalen;
  577                 vap->va_vcnstart = 0;
  578                 vap->va_vcnend = ntfs_btocn(vap->va_allocated);
  579                 vap->va_datap = malloc(vap->va_datalen,
  580                        M_NTFSRDATA, M_WAITOK);
  581                 memcpy(vap->va_datap, (caddr_t) rap + rap->a_r.a_dataoff,
  582                        rap->a_r.a_datalen);
  583         }
  584         ddprintf((", len: %d", vap->va_datalen));
  585 
  586         if (error)
  587                 free(vap, M_NTFSNTVATTR);
  588         else
  589                 *rvapp = vap;
  590 
  591         ddprintf(("\n"));
  592 
  593         return (error);
  594 }
  595 
  596 /*
  597  * Expand run into more utilizable and more memory eating format.
  598  */
  599 int
  600 ntfs_runtovrun(
  601                cn_t ** rcnp,
  602                cn_t ** rclp,
  603                u_long * rcntp,
  604                u_int8_t * run)
  605 {
  606         u_int32_t       off;
  607         u_int32_t       sz, i;
  608         cn_t           *cn;
  609         cn_t           *cl;
  610         u_long          cnt;
  611         cn_t            prev;
  612         cn_t            tmp;
  613 
  614         off = 0;
  615         cnt = 0;
  616         i = 0;
  617         while (run[off]) {
  618                 off += (run[off] & 0xF) + ((run[off] >> 4) & 0xF) + 1;
  619                 cnt++;
  620         }
  621         cn = malloc(cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
  622         cl = malloc(cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
  623 
  624         off = 0;
  625         cnt = 0;
  626         prev = 0;
  627         while (run[off]) {
  628 
  629                 sz = run[off++];
  630                 cl[cnt] = 0;
  631 
  632                 for (i = 0; i < (sz & 0xF); i++)
  633                         cl[cnt] += (u_int32_t) run[off++] << (i << 3);
  634 
  635                 sz >>= 4;
  636                 if (run[off + sz - 1] & 0x80) {
  637                         tmp = ((u_int64_t) - 1) << (sz << 3);
  638                         for (i = 0; i < sz; i++)
  639                                 tmp |= (u_int64_t) run[off++] << (i << 3);
  640                 } else {
  641                         tmp = 0;
  642                         for (i = 0; i < sz; i++)
  643                                 tmp |= (u_int64_t) run[off++] << (i << 3);
  644                 }
  645                 if (tmp)
  646                         prev = cn[cnt] = prev + tmp;
  647                 else
  648                         cn[cnt] = tmp;
  649 
  650                 cnt++;
  651         }
  652         *rcnp = cn;
  653         *rclp = cl;
  654         *rcntp = cnt;
  655         return (0);
  656 }
  657 
  658 /*
  659  * Compare unicode and ascii string case insens.
  660  */
  661 static int
  662 ntfs_uastricmp(ntmp, ustr, ustrlen, astr, astrlen)
  663         struct ntfsmount *ntmp;
  664         const wchar *ustr;
  665         size_t ustrlen;
  666         const char *astr;
  667         size_t astrlen;
  668 {
  669         int len;
  670         size_t i, j, mbstrlen = astrlen;
  671         int res;
  672         wchar wc;
  673 
  674         if (ntmp->ntm_ic_l2u) {
  675                 for (i = 0, j = 0; i < ustrlen && j < astrlen; i++, j++) {
  676                         if (j < astrlen -1) {
  677                                 wc = (wchar)astr[j]<<8 | (astr[j+1]&0xFF);
  678                                 len = 2;
  679                         } else {
  680                                 wc = (wchar)astr[j]<<8 & 0xFF00;
  681                                 len = 1;
  682                         }
  683                         res = ((int) NTFS_TOUPPER(ustr[i])) -
  684                                 ((int)NTFS_TOUPPER(NTFS_82U(wc, &len)));
  685                         j += len - 1;
  686                         mbstrlen -= len - 1;
  687 
  688                         if (res)
  689                                 return res;
  690                 }
  691         } else {
  692                 /*
  693                  * We use NTFS_82U(NTFS_U28(c)) to get rid of unicode
  694                  * symbols not covered by translation table
  695                  */
  696                 for (i = 0; i < ustrlen && i < astrlen; i++) {
  697                         res = ((int) NTFS_TOUPPER(NTFS_82U(NTFS_U28(ustr[i]), &len))) -
  698                                 ((int)NTFS_TOUPPER(NTFS_82U((wchar)astr[i], &len)));
  699                         if (res)
  700                                 return res;
  701                 }
  702         }
  703         return (ustrlen - mbstrlen);
  704 }
  705 
  706 /*
  707  * Compare unicode and ascii string case sens.
  708  */
  709 static int
  710 ntfs_uastrcmp(ntmp, ustr, ustrlen, astr, astrlen)
  711         struct ntfsmount *ntmp;
  712         const wchar *ustr;
  713         size_t ustrlen;
  714         const char *astr;
  715         size_t astrlen;
  716 {
  717         char u, l;
  718         size_t i, j, mbstrlen = astrlen;
  719         int res;
  720         wchar wc;
  721 
  722         for (i = 0, j = 0; (i < ustrlen) && (j < astrlen); i++, j++) {
  723                 res = 0;
  724                 wc = NTFS_U28(ustr[i]);
  725                 u = (char)(wc>>8);
  726                 l = (char)wc;
  727                 if (u != '\0' && j < astrlen -1) {
  728                         res = (int) (u - astr[j++]);
  729                         mbstrlen--;
  730                 }
  731                 res = (res<<8) + (int) (l - astr[j]);
  732                 if (res)
  733                         return res;
  734         }
  735         return (ustrlen - mbstrlen);
  736 }
  737 
  738 /* 
  739  * Search fnode in ntnode, if not found allocate and preinitialize.
  740  *
  741  * ntnode should be locked on entry.
  742  */
  743 int
  744 ntfs_fget(
  745         struct ntfsmount *ntmp,
  746         struct ntnode *ip,
  747         int attrtype,
  748         char *attrname,
  749         struct fnode **fpp)
  750 {
  751         struct fnode *fp;
  752 
  753         dprintf(("ntfs_fget: ino: %d, attrtype: 0x%x, attrname: %s\n",
  754                 ip->i_number,attrtype, attrname?attrname:""));
  755         *fpp = NULL;
  756         LIST_FOREACH(fp, &ip->i_fnlist, f_fnlist){
  757                 dprintf(("ntfs_fget: fnode: attrtype: %d, attrname: %s\n",
  758                         fp->f_attrtype, fp->f_attrname?fp->f_attrname:""));
  759 
  760                 if ((attrtype == fp->f_attrtype) && 
  761                     ((!attrname && !fp->f_attrname) ||
  762                      (attrname && fp->f_attrname &&
  763                       !strcmp(attrname,fp->f_attrname)))){
  764                         dprintf(("ntfs_fget: found existed: %p\n",fp));
  765                         *fpp = fp;
  766                 }
  767         }
  768 
  769         if (*fpp)
  770                 return (0);
  771 
  772         fp = malloc(sizeof(struct fnode), M_NTFSFNODE,
  773                 M_WAITOK | M_ZERO);
  774         dprintf(("ntfs_fget: allocating fnode: %p\n",fp));
  775 
  776         fp->f_ip = ip;
  777         if (attrname) {
  778                 fp->f_flag |= FN_AATTRNAME;
  779                 fp->f_attrname = malloc(strlen(attrname)+1, M_TEMP, M_WAITOK);
  780                 strcpy(fp->f_attrname, attrname);
  781         } else
  782                 fp->f_attrname = NULL;
  783         fp->f_attrtype = attrtype;
  784 
  785         ntfs_ntref(ip);
  786 
  787         LIST_INSERT_HEAD(&ip->i_fnlist, fp, f_fnlist);
  788 
  789         *fpp = fp;
  790 
  791         return (0);
  792 }
  793 
  794 /*
  795  * Deallocate fnode, remove it from ntnode's fnode list.
  796  *
  797  * ntnode should be locked.
  798  */
  799 void
  800 ntfs_frele(
  801         struct fnode *fp)
  802 {
  803         struct ntnode *ip = FTONT(fp);
  804 
  805         dprintf(("ntfs_frele: fnode: %p for %d: %p\n", fp, ip->i_number, ip));
  806 
  807         dprintf(("ntfs_frele: deallocating fnode\n"));
  808         LIST_REMOVE(fp,f_fnlist);
  809         if (fp->f_flag & FN_AATTRNAME)
  810                 free(fp->f_attrname, M_TEMP);
  811         if (fp->f_dirblbuf)
  812                 free(fp->f_dirblbuf, M_NTFSDIR);
  813         free(fp, M_NTFSFNODE);
  814         ntfs_ntrele(ip);
  815 }
  816 
  817 /*
  818  * Lookup attribute name in format: [[:$ATTR_TYPE]:$ATTR_NAME], 
  819  * $ATTR_TYPE is searched in attrdefs read from $AttrDefs.
  820  * If $ATTR_TYPE nott specifed, ATTR_A_DATA assumed.
  821  */
  822 static int
  823 ntfs_ntlookupattr(
  824                 struct ntfsmount * ntmp,
  825                 const char * name,
  826                 int namelen,
  827                 int *attrtype,
  828                 char **attrname)
  829 {
  830         const char *sys;
  831         size_t syslen, i;
  832         struct ntvattrdef *adp;
  833 
  834         if (namelen == 0)
  835                 return (0);
  836 
  837         if (name[0] == '$') {
  838                 sys = name;
  839                 for (syslen = 0; syslen < namelen; syslen++) {
  840                         if(sys[syslen] == ':') {
  841                                 name++;
  842                                 namelen--;
  843                                 break;
  844                         }
  845                 }
  846                 name += syslen;
  847                 namelen -= syslen;
  848 
  849                 adp = ntmp->ntm_ad;
  850                 for (i = 0; i < ntmp->ntm_adnum; i++, adp++){
  851                         if (syslen != adp->ad_namelen || 
  852                            strncmp(sys, adp->ad_name, syslen) != 0)
  853                                 continue;
  854 
  855                         *attrtype = adp->ad_type;
  856                         goto out;
  857                 }
  858                 return (ENOENT);
  859         } else
  860                 *attrtype = NTFS_A_DATA;
  861 
  862     out:
  863         if (namelen) {
  864                 (*attrname) = malloc(namelen, M_TEMP, M_WAITOK);
  865                 memcpy((*attrname), name, namelen);
  866                 (*attrname)[namelen] = '\0';
  867         }
  868 
  869         return (0);
  870 }
  871 
  872 /*
  873  * Lookup specifed node for filename, matching cnp,
  874  * return fnode filled.
  875  */
  876 int
  877 ntfs_ntlookupfile(
  878               struct ntfsmount * ntmp,
  879               struct vnode * vp,
  880               struct componentname * cnp,
  881               struct vnode ** vpp)
  882 {
  883         struct fnode   *fp = VTOF(vp);
  884         struct ntnode  *ip = FTONT(fp);
  885         struct ntvattr *vap;    /* Root attribute */
  886         cn_t            cn;     /* VCN in current attribute */
  887         caddr_t         rdbuf;  /* Buffer to read directory's blocks  */
  888         u_int32_t       blsize;
  889         u_int64_t       rdsize; /* Length of data to read from current block */
  890         struct attr_indexentry *iep;
  891         int             error, res, anamelen, fnamelen;
  892         const char     *fname,*aname;
  893         u_int32_t       aoff;
  894         int attrtype = NTFS_A_DATA;
  895         char *attrname = NULL;
  896         struct fnode   *nfp;
  897         struct vnode   *nvp;
  898         enum vtype      f_type;
  899 
  900         error = ntfs_ntget(ip);
  901         if (error)
  902                 return (error);
  903 
  904         error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
  905         if (error || (vap->va_flag & NTFS_AF_INRUN))
  906                 return (ENOTDIR);
  907 
  908         blsize = vap->va_a_iroot->ir_size;
  909         rdsize = vap->va_datalen;
  910 
  911         /*
  912          * Divide file name into: foofilefoofilefoofile[:attrspec]
  913          * Store like this:       fname:fnamelen       [aname:anamelen]
  914          */
  915         fname = cnp->cn_nameptr;
  916         aname = NULL;
  917         anamelen = 0;
  918         for (fnamelen = 0; fnamelen < cnp->cn_namelen; fnamelen++)
  919                 if(fname[fnamelen] == ':') {
  920                         aname = fname + fnamelen + 1;
  921                         anamelen = cnp->cn_namelen - fnamelen - 1;
  922                         dprintf(("ntfs_ntlookupfile: %s (%d), attr: %s (%d)\n",
  923                                 fname, fnamelen, aname, anamelen));
  924                         break;
  925                 }
  926 
  927         dprintf(("ntfs_ntlookupfile: blksz: %d, rdsz: %jd\n", blsize, rdsize));
  928 
  929         rdbuf = malloc(blsize, M_TEMP, M_WAITOK);
  930 
  931         error = ntfs_readattr(ntmp, ip, NTFS_A_INDXROOT, "$I30",
  932                                0, rdsize, rdbuf, NULL);
  933         if (error)
  934                 goto fail;
  935 
  936         aoff = sizeof(struct attr_indexroot);
  937 
  938         do {
  939                 iep = (struct attr_indexentry *) (rdbuf + aoff);
  940 
  941                 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
  942                         aoff += iep->reclen,
  943                         iep = (struct attr_indexentry *) (rdbuf + aoff))
  944                 {
  945                         ddprintf(("scan: %d, %d\n",
  946                                   (u_int32_t) iep->ie_number,
  947                                   (u_int32_t) iep->ie_fnametype));
  948 
  949                         /* check the name - the case-insensitible check
  950                          * has to come first, to break from this for loop
  951                          * if needed, so we can dive correctly */
  952                         res = NTFS_UASTRICMP(iep->ie_fname, iep->ie_fnamelen,
  953                                 fname, fnamelen);
  954                         if (res > 0) break;
  955                         if (res < 0) continue;
  956 
  957                         if (iep->ie_fnametype == 0 ||
  958                             !(ntmp->ntm_flag & NTFS_MFLAG_CASEINS))
  959                         {
  960                                 res = NTFS_UASTRCMP(iep->ie_fname,
  961                                         iep->ie_fnamelen, fname, fnamelen);
  962                                 if (res != 0) continue;
  963                         }
  964 
  965                         if (aname) {
  966                                 error = ntfs_ntlookupattr(ntmp,
  967                                         aname, anamelen,
  968                                         &attrtype, &attrname);
  969                                 if (error)
  970                                         goto fail;
  971                         }
  972 
  973                         /* Check if we've found ourself */
  974                         if ((iep->ie_number == ip->i_number) &&
  975                             (attrtype == fp->f_attrtype) &&
  976                             ((!attrname && !fp->f_attrname) ||
  977                              (attrname && fp->f_attrname &&
  978                               !strcmp(attrname, fp->f_attrname))))
  979                         {
  980                                 VREF(vp);
  981                                 *vpp = vp;
  982                                 error = 0;
  983                                 goto fail;
  984                         }
  985 
  986                         /* vget node, but don't load it */
  987                         error = ntfs_vgetex(ntmp->ntm_mountp,
  988                                    iep->ie_number, attrtype, attrname,
  989                                    LK_EXCLUSIVE, VG_DONTLOADIN | VG_DONTVALIDFN,
  990                                    curthread, &nvp);
  991 
  992                         /* free the buffer returned by ntfs_ntlookupattr() */
  993                         if (attrname) {
  994                                 free(attrname, M_TEMP);
  995                                 attrname = NULL;
  996                         }
  997 
  998                         if (error)
  999                                 goto fail;
 1000 
 1001                         nfp = VTOF(nvp);
 1002 
 1003                         if (nfp->f_flag & FN_VALID) {
 1004                                 *vpp = nvp;
 1005                                 goto fail;
 1006                         }
 1007 
 1008                         nfp->f_fflag = iep->ie_fflag;
 1009                         nfp->f_pnumber = iep->ie_fpnumber;
 1010                         nfp->f_times = iep->ie_ftimes;
 1011 
 1012                         if((nfp->f_fflag & NTFS_FFLAG_DIR) &&
 1013                            (nfp->f_attrtype == NTFS_A_DATA) &&
 1014                            (nfp->f_attrname == NULL))
 1015                                 f_type = VDIR;  
 1016                         else
 1017                                 f_type = VREG;  
 1018 
 1019                         nvp->v_type = f_type;
 1020 
 1021                         if ((nfp->f_attrtype == NTFS_A_DATA) &&
 1022                             (nfp->f_attrname == NULL))
 1023                         {
 1024                                 /* Opening default attribute */
 1025                                 nfp->f_size = iep->ie_fsize;
 1026                                 nfp->f_allocated = iep->ie_fallocated;
 1027                                 nfp->f_flag |= FN_PRELOADED;
 1028                         } else {
 1029                                 error = ntfs_filesize(ntmp, nfp,
 1030                                             &nfp->f_size, &nfp->f_allocated);
 1031                                 if (error) {
 1032                                         vput(nvp);
 1033                                         goto fail;
 1034                                 }
 1035                         }
 1036 
 1037                         nfp->f_flag &= ~FN_VALID;
 1038                         *vpp = nvp;
 1039                         goto fail;
 1040                 }
 1041 
 1042                 /* Dive if possible */
 1043                 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) {
 1044                         dprintf(("ntfs_ntlookupfile: diving\n"));
 1045 
 1046                         cn = *(cn_t *) (rdbuf + aoff +
 1047                                         iep->reclen - sizeof(cn_t));
 1048                         rdsize = blsize;
 1049 
 1050                         error = ntfs_readattr(ntmp, ip, NTFS_A_INDX, "$I30",
 1051                                         ntfs_cntob(cn), rdsize, rdbuf, NULL);
 1052                         if (error)
 1053                                 goto fail;
 1054 
 1055                         error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
 1056                                                 rdbuf, rdsize);
 1057                         if (error)
 1058                                 goto fail;
 1059 
 1060                         aoff = (((struct attr_indexalloc *) rdbuf)->ia_hdrsize +
 1061                                 0x18);
 1062                 } else {
 1063                         dprintf(("ntfs_ntlookupfile: nowhere to dive :-(\n"));
 1064                         error = ENOENT;
 1065                         break;
 1066                 }
 1067         } while (1);
 1068 
 1069         dprintf(("finish\n"));
 1070 
 1071 fail:
 1072         if (attrname) free(attrname, M_TEMP);
 1073         ntfs_ntvattrrele(vap);
 1074         ntfs_ntput(ip);
 1075         free(rdbuf, M_TEMP);
 1076         return (error);
 1077 }
 1078 
 1079 /*
 1080  * Check if name type is permitted to show.
 1081  */
 1082 int
 1083 ntfs_isnamepermitted(
 1084                      struct ntfsmount * ntmp,
 1085                      struct attr_indexentry * iep)
 1086 {
 1087         if (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)
 1088                 return 1;
 1089 
 1090         switch (iep->ie_fnametype) {
 1091         case 2:
 1092                 ddprintf(("ntfs_isnamepermitted: skipped DOS name\n"));
 1093                 return 0;
 1094         case 0: case 1: case 3:
 1095                 return 1;
 1096         default:
 1097                 printf("ntfs_isnamepermitted: " \
 1098                        "WARNING! Unknown file name type: %d\n",
 1099                        iep->ie_fnametype);
 1100                 break;
 1101         }
 1102         return 0;
 1103 }
 1104 
 1105 /*
 1106  * Read ntfs dir like stream of attr_indexentry, not like btree of them.
 1107  * This is done by scaning $BITMAP:$I30 for busy clusters and reading them.
 1108  * Ofcouse $INDEX_ROOT:$I30 is read before. Last read values are stored in
 1109  * fnode, so we can skip toward record number num almost immediatly.
 1110  * Anyway this is rather slow routine. The problem is that we don't know
 1111  * how many records are there in $INDEX_ALLOCATION:$I30 block.
 1112  */
 1113 int
 1114 ntfs_ntreaddir(
 1115                struct ntfsmount * ntmp,
 1116                struct fnode * fp,
 1117                u_int32_t num,
 1118                struct attr_indexentry ** riepp)
 1119 {
 1120         struct ntnode  *ip = FTONT(fp);
 1121         struct ntvattr *vap = NULL;     /* IndexRoot attribute */
 1122         struct ntvattr *bmvap = NULL;   /* BitMap attribute */
 1123         struct ntvattr *iavap = NULL;   /* IndexAllocation attribute */
 1124         caddr_t         rdbuf;          /* Buffer to read directory's blocks  */
 1125         u_int8_t       *bmp = NULL;     /* Bitmap */
 1126         u_int32_t       blsize;         /* Index allocation size (2048) */
 1127         u_int32_t       rdsize;         /* Length of data to read */
 1128         u_int32_t       attrnum;        /* Current attribute type */
 1129         u_int32_t       cpbl = 1;       /* Clusters per directory block */
 1130         u_int32_t       blnum;
 1131         struct attr_indexentry *iep;
 1132         int             error = ENOENT;
 1133         u_int32_t       aoff, cnum;
 1134 
 1135         dprintf(("ntfs_ntreaddir: read ino: %d, num: %d\n", ip->i_number, num));
 1136         error = ntfs_ntget(ip);
 1137         if (error)
 1138                 return (error);
 1139 
 1140         error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
 1141         if (error)
 1142                 return (ENOTDIR);
 1143 
 1144         if (fp->f_dirblbuf == NULL) {
 1145                 fp->f_dirblsz = vap->va_a_iroot->ir_size;
 1146                 fp->f_dirblbuf = malloc(max(vap->va_datalen,fp->f_dirblsz),
 1147                     M_NTFSDIR, M_WAITOK);
 1148         }
 1149 
 1150         blsize = fp->f_dirblsz;
 1151         rdbuf = fp->f_dirblbuf;
 1152 
 1153         dprintf(("ntfs_ntreaddir: rdbuf: %p, blsize: %d\n", rdbuf, blsize));
 1154 
 1155         if (vap->va_a_iroot->ir_flag & NTFS_IRFLAG_INDXALLOC) {
 1156                 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXBITMAP, "$I30",
 1157                                         0, &bmvap);
 1158                 if (error) {
 1159                         error = ENOTDIR;
 1160                         goto fail;
 1161                 }
 1162                 bmp = malloc(bmvap->va_datalen, M_TEMP, M_WAITOK);
 1163                 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 0,
 1164                                        bmvap->va_datalen, bmp, NULL);
 1165                 if (error)
 1166                         goto fail;
 1167 
 1168                 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDX, "$I30",
 1169                                         0, &iavap);
 1170                 if (error) {
 1171                         error = ENOTDIR;
 1172                         goto fail;
 1173                 }
 1174                 cpbl = ntfs_btocn(blsize + ntfs_cntob(1) - 1);
 1175                 dprintf(("ntfs_ntreaddir: indexalloc: %jd, cpbl: %d\n",
 1176                          iavap->va_datalen, cpbl));
 1177         } else {
 1178                 dprintf(("ntfs_ntreadidir: w/o BitMap and IndexAllocation\n"));
 1179                 iavap = bmvap = NULL;
 1180                 bmp = NULL;
 1181         }
 1182 
 1183         /* Try use previous values */
 1184         if ((fp->f_lastdnum < num) && (fp->f_lastdnum != 0)) {
 1185                 attrnum = fp->f_lastdattr;
 1186                 aoff = fp->f_lastdoff;
 1187                 blnum = fp->f_lastdblnum;
 1188                 cnum = fp->f_lastdnum;
 1189         } else {
 1190                 attrnum = NTFS_A_INDXROOT;
 1191                 aoff = sizeof(struct attr_indexroot);
 1192                 blnum = 0;
 1193                 cnum = 0;
 1194         }
 1195 
 1196         do {
 1197                 dprintf(("ntfs_ntreaddir: scan: 0x%x, %d, %d, %d, %d\n",
 1198                          attrnum, (u_int32_t) blnum, cnum, num, aoff));
 1199                 rdsize = (attrnum == NTFS_A_INDXROOT) ? vap->va_datalen : blsize;
 1200                 error = ntfs_readattr(ntmp, ip, attrnum, "$I30",
 1201                                 ntfs_cntob(blnum * cpbl), rdsize, rdbuf, NULL);
 1202                 if (error)
 1203                         goto fail;
 1204 
 1205                 if (attrnum == NTFS_A_INDX) {
 1206                         error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
 1207                                                 rdbuf, rdsize);
 1208                         if (error)
 1209                                 goto fail;
 1210                 }
 1211                 if (aoff == 0)
 1212                         aoff = (attrnum == NTFS_A_INDX) ?
 1213                                 (0x18 + ((struct attr_indexalloc *) rdbuf)->ia_hdrsize) :
 1214                                 sizeof(struct attr_indexroot);
 1215 
 1216                 iep = (struct attr_indexentry *) (rdbuf + aoff);
 1217                 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
 1218                         aoff += iep->reclen,
 1219                         iep = (struct attr_indexentry *) (rdbuf + aoff))
 1220                 {
 1221                         if (!ntfs_isnamepermitted(ntmp, iep)) continue;
 1222 
 1223                         if (cnum >= num) {
 1224                                 fp->f_lastdnum = cnum;
 1225                                 fp->f_lastdoff = aoff;
 1226                                 fp->f_lastdblnum = blnum;
 1227                                 fp->f_lastdattr = attrnum;
 1228 
 1229                                 *riepp = iep;
 1230 
 1231                                 error = 0;
 1232                                 goto fail;
 1233                         }
 1234                         cnum++;
 1235                 }
 1236 
 1237                 if (iavap) {
 1238                         if (attrnum == NTFS_A_INDXROOT)
 1239                                 blnum = 0;
 1240                         else
 1241                                 blnum++;
 1242 
 1243                         while (ntfs_cntob(blnum * cpbl) < iavap->va_datalen) {
 1244                                 if (bmp[blnum >> 3] & (1 << (blnum & 7)))
 1245                                         break;
 1246                                 blnum++;
 1247                         }
 1248 
 1249                         attrnum = NTFS_A_INDX;
 1250                         aoff = 0;
 1251                         if (ntfs_cntob(blnum * cpbl) >= iavap->va_datalen)
 1252                                 break;
 1253                         dprintf(("ntfs_ntreaddir: blnum: %d\n", (u_int32_t) blnum));
 1254                 }
 1255         } while (iavap);
 1256 
 1257         *riepp = NULL;
 1258         fp->f_lastdnum = 0;
 1259 
 1260 fail:
 1261         if (vap)
 1262                 ntfs_ntvattrrele(vap);
 1263         if (bmvap)
 1264                 ntfs_ntvattrrele(bmvap);
 1265         if (iavap)
 1266                 ntfs_ntvattrrele(iavap);
 1267         if (bmp)
 1268                 free(bmp, M_TEMP);
 1269         ntfs_ntput(ip);
 1270         return (error);
 1271 }
 1272 
 1273 /*
 1274  * Convert NTFS times that are in 100 ns units and begins from
 1275  * 1601 Jan 1 into unix times.
 1276  */
 1277 struct timespec
 1278 ntfs_nttimetounix(
 1279                   u_int64_t nt)
 1280 {
 1281         struct timespec t;
 1282 
 1283         /* WindowNT times are in 100 ns and from 1601 Jan 1 */
 1284         t.tv_nsec = (nt % (1000 * 1000 * 10)) * 100;
 1285         t.tv_sec = nt / (1000 * 1000 * 10) -
 1286                 369LL * 365LL * 24LL * 60LL * 60LL -
 1287                 89LL * 1LL * 24LL * 60LL * 60LL;
 1288         return (t);
 1289 }
 1290 
 1291 /*
 1292  * Get file times from NTFS_A_NAME attribute.
 1293  */
 1294 int
 1295 ntfs_times(
 1296            struct ntfsmount * ntmp,
 1297            struct ntnode * ip,
 1298            ntfs_times_t * tm)
 1299 {
 1300         struct ntvattr *vap;
 1301         int             error;
 1302 
 1303         dprintf(("ntfs_times: ino: %d...\n", ip->i_number));
 1304 
 1305         error = ntfs_ntget(ip);
 1306         if (error)
 1307                 return (error);
 1308 
 1309         error = ntfs_ntvattrget(ntmp, ip, NTFS_A_NAME, NULL, 0, &vap);
 1310         if (error) {
 1311                 ntfs_ntput(ip);
 1312                 return (error);
 1313         }
 1314         *tm = vap->va_a_name->n_times;
 1315         ntfs_ntvattrrele(vap);
 1316         ntfs_ntput(ip);
 1317 
 1318         return (0);
 1319 }
 1320 
 1321 /*
 1322  * Get file sizes from corresponding attribute. 
 1323  * 
 1324  * ntnode under fnode should be locked.
 1325  */
 1326 int
 1327 ntfs_filesize(
 1328               struct ntfsmount * ntmp,
 1329               struct fnode * fp,
 1330               u_int64_t * size,
 1331               u_int64_t * bytes)
 1332 {
 1333         struct ntvattr *vap;
 1334         struct ntnode *ip = FTONT(fp);
 1335         u_int64_t       sz, bn;
 1336         int             error;
 1337 
 1338         dprintf(("ntfs_filesize: ino: %d\n", ip->i_number));
 1339 
 1340         error = ntfs_ntvattrget(ntmp, ip,
 1341                 fp->f_attrtype, fp->f_attrname, 0, &vap);
 1342         if (error)
 1343                 return (error);
 1344 
 1345         bn = vap->va_allocated;
 1346         sz = vap->va_datalen;
 1347 
 1348         dprintf(("ntfs_filesize: %d bytes (%d bytes allocated)\n",
 1349                 (u_int32_t) sz, (u_int32_t) bn));
 1350 
 1351         if (size)
 1352                 *size = sz;
 1353         if (bytes)
 1354                 *bytes = bn;
 1355 
 1356         ntfs_ntvattrrele(vap);
 1357 
 1358         return (0);
 1359 }
 1360 
 1361 /*
 1362  * This is one of write routine.
 1363  */
 1364 int
 1365 ntfs_writeattr_plain(
 1366         struct ntfsmount * ntmp,
 1367         struct ntnode * ip,
 1368         u_int32_t attrnum,      
 1369         char *attrname,
 1370         off_t roff,
 1371         size_t rsize,
 1372         void *rdata,
 1373         size_t * initp,
 1374         struct uio *uio)
 1375 {
 1376         size_t          init;
 1377         int             error = 0;
 1378         off_t           off = roff, left = rsize, towrite;
 1379         caddr_t         data = rdata;
 1380         struct ntvattr *vap;
 1381         *initp = 0;
 1382 
 1383         while (left) {
 1384                 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
 1385                                         ntfs_btocn(off), &vap);
 1386                 if (error)
 1387                         return (error);
 1388                 towrite = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off);
 1389                 ddprintf(("ntfs_writeattr_plain: o: %d, s: %d (%d - %d)\n",
 1390                          (u_int32_t) off, (u_int32_t) towrite,
 1391                          (u_int32_t) vap->va_vcnstart,
 1392                          (u_int32_t) vap->va_vcnend));
 1393                 error = ntfs_writentvattr_plain(ntmp, ip, vap,
 1394                                          off - ntfs_cntob(vap->va_vcnstart),
 1395                                          towrite, data, &init, uio);
 1396                 if (error) {
 1397                         printf("ntfs_writeattr_plain: " \
 1398                                "ntfs_writentvattr_plain failed: o: %d, s: %d\n",
 1399                                (u_int32_t) off, (u_int32_t) towrite);
 1400                         printf("ntfs_writeattr_plain: attrib: %d - %d\n",
 1401                                (u_int32_t) vap->va_vcnstart, 
 1402                                (u_int32_t) vap->va_vcnend);
 1403                         ntfs_ntvattrrele(vap);
 1404                         break;
 1405                 }
 1406                 ntfs_ntvattrrele(vap);
 1407                 left -= towrite;
 1408                 off += towrite;
 1409                 data = data + towrite;
 1410                 *initp += init;
 1411         }
 1412 
 1413         return (error);
 1414 }
 1415 
 1416 /*
 1417  * This is one of write routine.
 1418  *
 1419  * ntnode should be locked.
 1420  */
 1421 int
 1422 ntfs_writentvattr_plain(
 1423         struct ntfsmount * ntmp,
 1424         struct ntnode * ip,
 1425         struct ntvattr * vap,
 1426         off_t roff,
 1427         size_t rsize,
 1428         void *rdata,
 1429         size_t * initp,
 1430         struct uio *uio)
 1431 {
 1432         int             error = 0;
 1433         off_t           off;
 1434         int             cnt;
 1435         cn_t            ccn, ccl, cn, left, cl;
 1436         caddr_t         data = rdata;
 1437         struct buf     *bp;
 1438         size_t          tocopy;
 1439 
 1440         *initp = 0;
 1441 
 1442         if ((vap->va_flag & NTFS_AF_INRUN) == 0) {
 1443                 printf("ntfs_writevattr_plain: CAN'T WRITE RES. ATTRIBUTE\n");
 1444                 return ENOTTY;
 1445         }
 1446 
 1447         ddprintf(("ntfs_writentvattr_plain: data in run: %ld chains\n",
 1448                  vap->va_vruncnt));
 1449 
 1450         off = roff;
 1451         left = rsize;
 1452         ccl = 0;
 1453         ccn = 0;
 1454         cnt = 0;
 1455         for (; left && (cnt < vap->va_vruncnt); cnt++) {
 1456                 ccn = vap->va_vruncn[cnt];
 1457                 ccl = vap->va_vruncl[cnt];
 1458 
 1459                 ddprintf(("ntfs_writentvattr_plain: " \
 1460                          "left %d, cn: 0x%x, cl: %d, off: %d\n", \
 1461                          (u_int32_t) left, (u_int32_t) ccn, \
 1462                          (u_int32_t) ccl, (u_int32_t) off));
 1463 
 1464                 if (ntfs_cntob(ccl) < off) {
 1465                         off -= ntfs_cntob(ccl);
 1466                         cnt++;
 1467                         continue;
 1468                 }
 1469                 if (!ccn && ip->i_number != NTFS_BOOTINO)
 1470                         continue; /* XXX */
 1471 
 1472                 ccl -= ntfs_btocn(off);
 1473                 cn = ccn + ntfs_btocn(off);
 1474                 off = ntfs_btocnoff(off);
 1475 
 1476                 while (left && ccl) {
 1477                         /*
 1478                          * Always read and write single clusters at a time -
 1479                          * we need to avoid requesting differently-sized
 1480                          * blocks at the same disk offsets to avoid
 1481                          * confusing the buffer cache.
 1482                          */
 1483                         tocopy = MIN(left, ntfs_cntob(1) - off);
 1484                         cl = ntfs_btocl(tocopy + off);
 1485                         KASSERT(cl == 1 && tocopy <= ntfs_cntob(1),
 1486                             ("single cluster limit mistake"));
 1487                         ddprintf(("ntfs_writentvattr_plain: write: " \
 1488                                 "cn: 0x%x cl: %d, off: %d len: %d, left: %d\n",
 1489                                 (u_int32_t) cn, (u_int32_t) cl, 
 1490                                 (u_int32_t) off, (u_int32_t) tocopy, 
 1491                                 (u_int32_t) left));
 1492                         if ((off == 0) && (tocopy == ntfs_cntob(cl)))
 1493                         {
 1494                                 bp = getblk(ntmp->ntm_devvp, ntfs_cntobn(cn),
 1495                                             ntfs_cntob(cl), 0, 0, 0);
 1496                                 clrbuf(bp);
 1497                         } else {
 1498                                 error = bread(ntmp->ntm_devvp, ntfs_cntobn(cn),
 1499                                               ntfs_cntob(cl), NOCRED, &bp);
 1500                                 if (error) {
 1501                                         brelse(bp);
 1502                                         return (error);
 1503                                 }
 1504                         }
 1505                         if (uio)
 1506                                 uiomove(bp->b_data + off, tocopy, uio);
 1507                         else
 1508                                 memcpy(bp->b_data + off, data, tocopy);
 1509                         bawrite(bp);
 1510                         data = data + tocopy;
 1511                         *initp += tocopy;
 1512                         off = 0;
 1513                         left -= tocopy;
 1514                         cn += cl;
 1515                         ccl -= cl;
 1516                 }
 1517         }
 1518 
 1519         if (left) {
 1520                 printf("ntfs_writentvattr_plain: POSSIBLE RUN ERROR\n");
 1521                 error = EINVAL;
 1522         }
 1523 
 1524         return (error);
 1525 }
 1526 
 1527 /*
 1528  * This is one of read routines.
 1529  *
 1530  * ntnode should be locked.
 1531  */
 1532 int
 1533 ntfs_readntvattr_plain(
 1534         struct ntfsmount * ntmp,
 1535         struct ntnode * ip,
 1536         struct ntvattr * vap,
 1537         off_t roff,
 1538         size_t rsize,
 1539         void *rdata,
 1540         size_t * initp,
 1541         struct uio *uio)
 1542 {
 1543         int             error = 0;
 1544         off_t           off;
 1545 
 1546         *initp = 0;
 1547         if (vap->va_flag & NTFS_AF_INRUN) {
 1548                 int             cnt;
 1549                 cn_t            ccn, ccl, cn, left, cl;
 1550                 caddr_t         data = rdata;
 1551                 struct buf     *bp;
 1552                 size_t          tocopy;
 1553 
 1554                 ddprintf(("ntfs_readntvattr_plain: data in run: %ld chains\n",
 1555                          vap->va_vruncnt));
 1556 
 1557                 off = roff;
 1558                 left = rsize;
 1559                 ccl = 0;
 1560                 ccn = 0;
 1561                 cnt = 0;
 1562                 while (left && (cnt < vap->va_vruncnt)) {
 1563                         ccn = vap->va_vruncn[cnt];
 1564                         ccl = vap->va_vruncl[cnt];
 1565 
 1566                         ddprintf(("ntfs_readntvattr_plain: " \
 1567                                  "left %d, cn: 0x%x, cl: %d, off: %d\n", \
 1568                                  (u_int32_t) left, (u_int32_t) ccn, \
 1569                                  (u_int32_t) ccl, (u_int32_t) off));
 1570 
 1571                         if (ntfs_cntob(ccl) < off) {
 1572                                 off -= ntfs_cntob(ccl);
 1573                                 cnt++;
 1574                                 continue;
 1575                         }
 1576                         if (ccn || ip->i_number == NTFS_BOOTINO) {
 1577                                 ccl -= ntfs_btocn(off);
 1578                                 cn = ccn + ntfs_btocn(off);
 1579                                 off = ntfs_btocnoff(off);
 1580 
 1581                                 while (left && ccl) {
 1582                                         /*
 1583                                          * Always read single clusters at a
 1584                                          * time - we need to avoid reading
 1585                                          * differently-sized blocks at the
 1586                                          * same disk offsets to avoid
 1587                                          * confusing the buffer cache.
 1588                                          */
 1589                                         tocopy = MIN(left,
 1590                                             ntfs_cntob(1) - off);
 1591                                         cl = ntfs_btocl(tocopy + off);
 1592                                         KASSERT(cl == 1 &&
 1593                                             tocopy <= ntfs_cntob(1),
 1594                                             ("single cluster limit mistake"));
 1595 
 1596                                         ddprintf(("ntfs_readntvattr_plain: " \
 1597                                                 "read: cn: 0x%x cl: %d, " \
 1598                                                 "off: %d len: %d, left: %d\n",
 1599                                                 (u_int32_t) cn, 
 1600                                                 (u_int32_t) cl, 
 1601                                                 (u_int32_t) off, 
 1602                                                 (u_int32_t) tocopy, 
 1603                                                 (u_int32_t) left));
 1604                                         error = bread(ntmp->ntm_devvp,
 1605                                                       ntfs_cntobn(cn),
 1606                                                       ntfs_cntob(cl),
 1607                                                       NOCRED, &bp);
 1608                                         if (error) {
 1609                                                 brelse(bp);
 1610                                                 return (error);
 1611                                         }
 1612                                         if (uio) {
 1613                                                 uiomove(bp->b_data + off,
 1614                                                         tocopy, uio);
 1615                                         } else {
 1616                                                 memcpy(data, bp->b_data + off,
 1617                                                         tocopy);
 1618                                         }
 1619                                         brelse(bp);
 1620                                         data = data + tocopy;
 1621                                         *initp += tocopy;
 1622                                         off = 0;
 1623                                         left -= tocopy;
 1624                                         cn += cl;
 1625                                         ccl -= cl;
 1626                                 }
 1627                         } else {
 1628                                 tocopy = MIN(left, ntfs_cntob(ccl) - off);
 1629                                 ddprintf(("ntfs_readntvattr_plain: "
 1630                                         "hole: ccn: 0x%x ccl: %d, off: %d, " \
 1631                                         " len: %d, left: %d\n", 
 1632                                         (u_int32_t) ccn, (u_int32_t) ccl, 
 1633                                         (u_int32_t) off, (u_int32_t) tocopy, 
 1634                                         (u_int32_t) left));
 1635                                 left -= tocopy;
 1636                                 off = 0;
 1637                                 if (uio) {
 1638                                         size_t remains = tocopy;
 1639                                         for(; remains; remains--)
 1640                                                 uiomove("", 1, uio);
 1641                                 } else 
 1642                                         bzero(data, tocopy);
 1643                                 data = data + tocopy;
 1644                         }
 1645                         cnt++;
 1646                 }
 1647                 if (left) {
 1648                         printf("ntfs_readntvattr_plain: POSSIBLE RUN ERROR\n");
 1649                         error = E2BIG;
 1650                 }
 1651         } else {
 1652                 ddprintf(("ntfs_readnvattr_plain: data is in mft record\n"));
 1653                 if (uio) 
 1654                         uiomove(vap->va_datap + roff, rsize, uio);
 1655                 else
 1656                         memcpy(rdata, vap->va_datap + roff, rsize);
 1657                 *initp += rsize;
 1658         }
 1659 
 1660         return (error);
 1661 }
 1662 
 1663 /*
 1664  * This is one of read routines.
 1665  */
 1666 int
 1667 ntfs_readattr_plain(
 1668         struct ntfsmount * ntmp,
 1669         struct ntnode * ip,
 1670         u_int32_t attrnum,      
 1671         char *attrname,
 1672         off_t roff,
 1673         size_t rsize,
 1674         void *rdata,
 1675         size_t * initp,
 1676         struct uio *uio)
 1677 {
 1678         size_t          init;
 1679         int             error = 0;
 1680         off_t           off = roff, left = rsize, toread;
 1681         caddr_t         data = rdata;
 1682         struct ntvattr *vap;
 1683         *initp = 0;
 1684 
 1685         while (left) {
 1686                 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
 1687                                         ntfs_btocn(off), &vap);
 1688                 if (error)
 1689                         return (error);
 1690                 toread = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off);
 1691                 ddprintf(("ntfs_readattr_plain: o: %d, s: %d (%d - %d)\n",
 1692                          (u_int32_t) off, (u_int32_t) toread,
 1693                          (u_int32_t) vap->va_vcnstart,
 1694                          (u_int32_t) vap->va_vcnend));
 1695                 error = ntfs_readntvattr_plain(ntmp, ip, vap,
 1696                                          off - ntfs_cntob(vap->va_vcnstart),
 1697                                          toread, data, &init, uio);
 1698                 if (error) {
 1699                         printf("ntfs_readattr_plain: " \
 1700                                "ntfs_readntvattr_plain failed: o: %d, s: %d\n",
 1701                                (u_int32_t) off, (u_int32_t) toread);
 1702                         printf("ntfs_readattr_plain: attrib: %d - %d\n",
 1703                                (u_int32_t) vap->va_vcnstart, 
 1704                                (u_int32_t) vap->va_vcnend);
 1705                         ntfs_ntvattrrele(vap);
 1706                         break;
 1707                 }
 1708                 ntfs_ntvattrrele(vap);
 1709                 left -= toread;
 1710                 off += toread;
 1711                 data = data + toread;
 1712                 *initp += init;
 1713         }
 1714 
 1715         return (error);
 1716 }
 1717 
 1718 /*
 1719  * This is one of read routines.
 1720  */
 1721 int
 1722 ntfs_readattr(
 1723         struct ntfsmount * ntmp,
 1724         struct ntnode * ip,
 1725         u_int32_t attrnum,
 1726         char *attrname,
 1727         off_t roff,
 1728         size_t rsize,
 1729         void *rdata,
 1730         struct uio *uio)
 1731 {
 1732         int             error = 0;
 1733         struct ntvattr *vap;
 1734         size_t          init;
 1735 
 1736         ddprintf(("ntfs_readattr: reading %d: 0x%x, from %d size %d bytes\n",
 1737                ip->i_number, attrnum, (u_int32_t) roff, (u_int32_t) rsize));
 1738 
 1739         error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 0, &vap);
 1740         if (error)
 1741                 return (error);
 1742 
 1743         if ((roff > vap->va_datalen) ||
 1744             (roff + rsize > vap->va_datalen)) {
 1745                 ddprintf(("ntfs_readattr: offset too big\n"));
 1746                 ntfs_ntvattrrele(vap);
 1747                 return (E2BIG);
 1748         }
 1749         if (vap->va_compression && vap->va_compressalg) {
 1750                 u_int8_t       *cup;
 1751                 u_int8_t       *uup;
 1752                 off_t           off = roff, left = rsize, tocopy;
 1753                 caddr_t         data = rdata;
 1754                 cn_t            cn;
 1755 
 1756                 ddprintf(("ntfs_ntreadattr: compression: %d\n",
 1757                          vap->va_compressalg));
 1758 
 1759                 cup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL),
 1760                        M_NTFSDECOMP, M_WAITOK);
 1761                 uup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL),
 1762                        M_NTFSDECOMP, M_WAITOK);
 1763 
 1764                 cn = (ntfs_btocn(roff)) & (~(NTFS_COMPUNIT_CL - 1));
 1765                 off = roff - ntfs_cntob(cn);
 1766 
 1767                 while (left) {
 1768                         error = ntfs_readattr_plain(ntmp, ip, attrnum,
 1769                                                   attrname, ntfs_cntob(cn),
 1770                                                   ntfs_cntob(NTFS_COMPUNIT_CL),
 1771                                                   cup, &init, NULL);
 1772                         if (error)
 1773                                 break;
 1774 
 1775                         tocopy = MIN(left, ntfs_cntob(NTFS_COMPUNIT_CL) - off);
 1776 
 1777                         if (init == ntfs_cntob(NTFS_COMPUNIT_CL)) {
 1778                                 if (uio)
 1779                                         uiomove(cup + off, tocopy, uio);
 1780                                 else
 1781                                         memcpy(data, cup + off, tocopy);
 1782                         } else if (init == 0) {
 1783                                 if (uio) {
 1784                                         size_t remains = tocopy;
 1785                                         for(; remains; remains--)
 1786                                                 uiomove("", 1, uio);
 1787                                 }
 1788                                 else
 1789                                         bzero(data, tocopy);
 1790                         } else {
 1791                                 error = ntfs_uncompunit(ntmp, uup, cup);
 1792                                 if (error)
 1793                                         break;
 1794                                 if (uio)
 1795                                         uiomove(uup + off, tocopy, uio);
 1796                                 else
 1797                                         memcpy(data, uup + off, tocopy);
 1798                         }
 1799 
 1800                         left -= tocopy;
 1801                         data = data + tocopy;
 1802                         off += tocopy - ntfs_cntob(NTFS_COMPUNIT_CL);
 1803                         cn += NTFS_COMPUNIT_CL;
 1804                 }
 1805 
 1806                 free(uup, M_NTFSDECOMP);
 1807                 free(cup, M_NTFSDECOMP);
 1808         } else
 1809                 error = ntfs_readattr_plain(ntmp, ip, attrnum, attrname,
 1810                                              roff, rsize, rdata, &init, uio);
 1811         ntfs_ntvattrrele(vap);
 1812         return (error);
 1813 }
 1814 
 1815 #if 0
 1816 int
 1817 ntfs_parserun(
 1818               cn_t * cn,
 1819               cn_t * cl,
 1820               u_int8_t * run,
 1821               u_long len,
 1822               u_long *off)
 1823 {
 1824         u_int8_t        sz;
 1825         int             i;
 1826 
 1827         if (NULL == run) {
 1828                 printf("ntfs_parsetun: run == NULL\n");
 1829                 return (EINVAL);
 1830         }
 1831         sz = run[(*off)++];
 1832         if (0 == sz) {
 1833                 printf("ntfs_parserun: trying to go out of run\n");
 1834                 return (E2BIG);
 1835         }
 1836         *cl = 0;
 1837         if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
 1838                 printf("ntfs_parserun: " \
 1839                        "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
 1840                        sz, len, *off);
 1841                 return (EINVAL);
 1842         }
 1843         for (i = 0; i < (sz & 0xF); i++)
 1844                 *cl += (u_int32_t) run[(*off)++] << (i << 3);
 1845 
 1846         sz >>= 4;
 1847         if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
 1848                 printf("ntfs_parserun: " \
 1849                        "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
 1850                        sz, len, *off);
 1851                 return (EINVAL);
 1852         }
 1853         for (i = 0; i < (sz & 0xF); i++)
 1854                 *cn += (u_int32_t) run[(*off)++] << (i << 3);
 1855 
 1856         return (0);
 1857 }
 1858 #endif
 1859 
 1860 /*
 1861  * Process fixup routine on given buffer.
 1862  */
 1863 int
 1864 ntfs_procfixups(
 1865                 struct ntfsmount * ntmp,
 1866                 u_int32_t magic,
 1867                 caddr_t buf,
 1868                 size_t len)
 1869 {
 1870         struct fixuphdr *fhp = (struct fixuphdr *) buf;
 1871         int             i;
 1872         u_int16_t       fixup;
 1873         u_int16_t      *fxp;
 1874         u_int16_t      *cfxp;
 1875 
 1876         if (fhp->fh_magic != magic) {
 1877                 printf("ntfs_procfixups: magic doesn't match: %08x != %08x\n",
 1878                        fhp->fh_magic, magic);
 1879                 return (EINVAL);
 1880         }
 1881         if ((fhp->fh_fnum - 1) * ntmp->ntm_bps != len) {
 1882                 printf("ntfs_procfixups: " \
 1883                        "bad fixups number: %d for %ld bytes block\n", 
 1884                        fhp->fh_fnum, (long)len);        /* XXX printf kludge */
 1885                 return (EINVAL);
 1886         }
 1887         if (fhp->fh_foff >= ntmp->ntm_spc * ntmp->ntm_mftrecsz * ntmp->ntm_bps) {
 1888                 printf("ntfs_procfixups: invalid offset: %x", fhp->fh_foff);
 1889                 return (EINVAL);
 1890         }
 1891         fxp = (u_int16_t *) (buf + fhp->fh_foff);
 1892         cfxp = (u_int16_t *) (buf + ntmp->ntm_bps - 2);
 1893         fixup = *fxp++;
 1894         for (i = 1; i < fhp->fh_fnum; i++, fxp++) {
 1895                 if (*cfxp != fixup) {
 1896                         printf("ntfs_procfixups: fixup %d doesn't match\n", i);
 1897                         return (EINVAL);
 1898                 }
 1899                 *cfxp = *fxp;
 1900                 cfxp = (u_int16_t *) ((caddr_t) cfxp + ntmp->ntm_bps);
 1901         }
 1902         return (0);
 1903 }
 1904 
 1905 #if 0
 1906 int
 1907 ntfs_runtocn(
 1908              cn_t * cn, 
 1909              struct ntfsmount * ntmp,
 1910              u_int8_t * run,
 1911              u_long len,
 1912              cn_t vcn)
 1913 {
 1914         cn_t            ccn = 0;
 1915         cn_t            ccl = 0;
 1916         u_long          off = 0;
 1917         int             error = 0;
 1918 
 1919 #if NTFS_DEBUG
 1920         int             i;
 1921         printf("ntfs_runtocn: run: %p, %ld bytes, vcn:%ld\n",
 1922                 run, len, (u_long) vcn);
 1923         printf("ntfs_runtocn: run: ");
 1924         for (i = 0; i < len; i++)
 1925                 printf("0x%02x ", run[i]);
 1926         printf("\n");
 1927 #endif
 1928 
 1929         if (NULL == run) {
 1930                 printf("ntfs_runtocn: run == NULL\n");
 1931                 return (EINVAL);
 1932         }
 1933         do {
 1934                 if (run[off] == 0) {
 1935                         printf("ntfs_runtocn: vcn too big\n");
 1936                         return (E2BIG);
 1937                 }
 1938                 vcn -= ccl;
 1939                 error = ntfs_parserun(&ccn, &ccl, run, len, &off);
 1940                 if (error) {
 1941                         printf("ntfs_runtocn: ntfs_parserun failed\n");
 1942                         return (error);
 1943                 }
 1944         } while (ccl <= vcn);
 1945         *cn = ccn + vcn;
 1946         return (0);
 1947 }
 1948 #endif
 1949 
 1950 /*
 1951  * this initializes toupper table & dependant variables to be ready for
 1952  * later work
 1953  */
 1954 void
 1955 ntfs_toupper_init()
 1956 {
 1957         ntfs_toupper_tab = (wchar *) NULL;
 1958         lockinit(&ntfs_toupper_lock, PVFS, "ntfs_toupper", 0, 0);
 1959         ntfs_toupper_usecount = 0;
 1960 }
 1961 
 1962 void
 1963 ntfs_toupper_destroy(void)
 1964 {
 1965 
 1966         lockdestroy(&ntfs_toupper_lock);
 1967 }
 1968 
 1969 /*
 1970  * if the ntfs_toupper_tab[] is filled already, just raise use count;
 1971  * otherwise read the data from the filesystem we are currently mounting
 1972  */
 1973 int
 1974 ntfs_toupper_use(mp, ntmp)
 1975         struct mount *mp;
 1976         struct ntfsmount *ntmp;
 1977 {
 1978         int error = 0;
 1979         struct vnode *vp;
 1980 
 1981         /* get exclusive access */
 1982         lockmgr(&ntfs_toupper_lock, LK_EXCLUSIVE, NULL);
 1983         
 1984         /* only read the translation data from a file if it hasn't been
 1985          * read already */
 1986         if (ntfs_toupper_tab)
 1987                 goto out;
 1988 
 1989         /*
 1990          * Read in Unicode lowercase -> uppercase translation file.
 1991          * XXX for now, just the first 256 entries are used anyway,
 1992          * so don't bother reading more
 1993          */
 1994         ntfs_toupper_tab = malloc(65536 * sizeof(wchar),
 1995                 M_NTFSRDATA, M_WAITOK);
 1996 
 1997         if ((error = VFS_VGET(mp, NTFS_UPCASEINO, LK_EXCLUSIVE, &vp)))
 1998                 goto out;
 1999         error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
 2000                         0, 65536*sizeof(wchar), (char *) ntfs_toupper_tab, NULL);
 2001         vput(vp);
 2002 
 2003     out:
 2004         ntfs_toupper_usecount++;
 2005         lockmgr(&ntfs_toupper_lock, LK_RELEASE, NULL);
 2006         return (error);
 2007 }
 2008 
 2009 /*
 2010  * lower the use count and if it reaches zero, free the memory
 2011  * tied by toupper table
 2012  */
 2013 void
 2014 ntfs_toupper_unuse()
 2015 {
 2016         /* get exclusive access */
 2017         lockmgr(&ntfs_toupper_lock, LK_EXCLUSIVE, NULL);
 2018 
 2019         ntfs_toupper_usecount--;
 2020         if (ntfs_toupper_usecount == 0) {
 2021                 free(ntfs_toupper_tab, M_NTFSRDATA);
 2022                 ntfs_toupper_tab = NULL;
 2023         }
 2024 #ifdef DIAGNOSTIC
 2025         else if (ntfs_toupper_usecount < 0) {
 2026                 panic("ntfs_toupper_unuse(): use count negative: %d\n",
 2027                         ntfs_toupper_usecount);
 2028         }
 2029 #endif
 2030         
 2031         /* release the lock */
 2032         lockmgr(&ntfs_toupper_lock, LK_RELEASE, NULL);
 2033 } 
 2034 
 2035 int
 2036 ntfs_u28_init(
 2037         struct ntfsmount *ntmp,
 2038         wchar *u2w,
 2039         char *cs_local,
 2040         char *cs_ntfs)
 2041 {
 2042         char ** u28;
 2043         int i, j, h, l;
 2044 
 2045         if (ntfs_iconv && cs_local) {
 2046                 ntfs_iconv->open(cs_local, cs_ntfs, &ntmp->ntm_ic_u2l);
 2047                 return (0);
 2048         }
 2049 
 2050         u28 = malloc(256 * sizeof(char*), M_TEMP, M_WAITOK | M_ZERO);
 2051 
 2052         for (i=0; i<256; i++) {
 2053                 h = (u2w[i] >> 8) & 0xFF;
 2054                 l = (u2w[i]) &0xFF;
 2055 
 2056                 if (u28[h] == NULL) {
 2057                         u28[h] = malloc(256 * sizeof(char), M_TEMP, M_WAITOK);
 2058                         for (j=0; j<256; j++)
 2059                                 u28[h][j] = '_';
 2060                 }
 2061 
 2062                 u28[h][l] = i & 0xFF;
 2063         }
 2064 
 2065         ntmp->ntm_u28 = u28;
 2066 
 2067         return (0);
 2068 }
 2069 
 2070 int
 2071 ntfs_u28_uninit(struct ntfsmount *ntmp)
 2072 {
 2073         char ** u28;
 2074         int i;
 2075 
 2076         if (ntmp->ntm_u28 == NULL) {
 2077                 if (ntfs_iconv && ntmp->ntm_ic_u2l) {
 2078                         ntfs_iconv->close(ntmp->ntm_ic_u2l);
 2079                 }
 2080                 return (0);
 2081         }
 2082 
 2083         u28 = ntmp->ntm_u28;
 2084 
 2085         for (i=0; i<256; i++)
 2086                 if (u28[i] != NULL)
 2087                         free(u28[i], M_TEMP);
 2088 
 2089         free(u28, M_TEMP);
 2090 
 2091         return (0);
 2092 }
 2093 
 2094 int
 2095 ntfs_82u_init(
 2096         struct ntfsmount *ntmp,
 2097         char *cs_local,
 2098         char *cs_ntfs)
 2099 {
 2100         wchar * _82u;
 2101         int i;
 2102 
 2103         if (ntfs_iconv && cs_local) {
 2104                 ntfs_iconv->open(cs_ntfs, cs_local, &ntmp->ntm_ic_l2u);
 2105                 return (0);
 2106         }
 2107 
 2108         _82u = malloc(256 * sizeof(wchar), M_TEMP, M_WAITOK);
 2109 
 2110         for (i=0; i<256; i++)
 2111                         _82u[i] = i;
 2112 
 2113         ntmp->ntm_82u = _82u;
 2114 
 2115         return (0);
 2116 }
 2117 
 2118 int
 2119 ntfs_82u_uninit(struct ntfsmount *ntmp)
 2120 {
 2121 
 2122         if (ntmp->ntm_82u == NULL) {
 2123                 if (ntfs_iconv && ntmp->ntm_ic_l2u) {
 2124                         ntfs_iconv->close(ntmp->ntm_ic_l2u);
 2125                 }
 2126                 return (0);
 2127         }
 2128 
 2129         free(ntmp->ntm_82u, M_TEMP);
 2130         return (0);
 2131 }
 2132 
 2133 /*
 2134  * maps the Unicode char to 8bit equivalent
 2135  * XXX currently only gets lower 8bit from the Unicode char
 2136  * and substitutes a '_' for it if the result would be '\0';
 2137  * something better has to be definitely though out
 2138  */
 2139 wchar
 2140 ntfs_u28(
 2141         struct ntfsmount *ntmp, 
 2142         wchar wc)
 2143 {
 2144         char *p, *outp, inbuf[3], outbuf[3];
 2145         size_t ilen, olen;
 2146 
 2147         if (ntfs_iconv && ntmp->ntm_ic_u2l) {
 2148                 ilen = olen = 2;
 2149 
 2150                 inbuf[0] = (char)(wc>>8);
 2151                 inbuf[1] = (char)wc;
 2152                 inbuf[2] = '\0';
 2153                 p = inbuf;
 2154                 outp = outbuf;
 2155                 ntfs_iconv->convchr(ntmp->ntm_ic_u2l, (const char **)&p, &ilen,
 2156                                     &outp, &olen);
 2157                 if (olen == 1) {
 2158                         return ((wchar)(outbuf[0]&0xFF));
 2159                 } else if (olen == 0) {
 2160                         return ((wchar)((outbuf[0]<<8) | (outbuf[1]&0xFF)));
 2161                 }
 2162                 return ('?');
 2163         }
 2164 
 2165         p = ntmp->ntm_u28[(wc>>8)&0xFF];
 2166         if (p == NULL)
 2167                 return ('_');
 2168         return (p[wc&0xFF]&0xFF);
 2169 }
 2170 
 2171 wchar
 2172 ntfs_82u(
 2173         struct ntfsmount *ntmp, 
 2174         wchar wc,
 2175         int *len)
 2176 {
 2177         char *p, *outp, inbuf[3], outbuf[3];
 2178         wchar uc;
 2179         size_t ilen, olen;
 2180 
 2181         if (ntfs_iconv && ntmp->ntm_ic_l2u) {
 2182                 ilen = (size_t)*len;
 2183                 olen = 2;
 2184 
 2185                 inbuf[0] = (char)(wc>>8);
 2186                 inbuf[1] = (char)wc;
 2187                 inbuf[2] = '\0';
 2188                 p = inbuf;
 2189                 outp = outbuf;
 2190                 ntfs_iconv->convchr(ntmp->ntm_ic_l2u, (const char **)&p, &ilen,
 2191                                     &outp, &olen);
 2192                 *len -= (int)ilen;
 2193                 uc = (wchar)((outbuf[0]<<8) | (outbuf[1]&0xFF));
 2194 
 2195                 return (uc);
 2196         }
 2197 
 2198         if (ntmp->ntm_82u != NULL)
 2199                 return (ntmp->ntm_82u[wc&0xFF]);
 2200 
 2201         return ('?');
 2202 }
 2203 

Cache object: 6d3e2c6d37dba1d2d2a4afbeadc5f3c2


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