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

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    1 /*-
    2  * Copyright (c) 1989, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * This code is derived from software contributed to Berkeley by
    6  * Rick Macklem at The University of Guelph.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 4. Neither the name of the University nor the names of its contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  *
   32  */
   33 
   34 #include <sys/cdefs.h>
   35 __FBSDID("$FreeBSD: releng/10.0/sys/fs/nfsserver/nfs_nfsdsubs.c 228260 2011-12-04 16:33:04Z rmacklem $");
   36 
   37 #ifndef APPLEKEXT
   38 /*
   39  * These functions support the macros and help fiddle mbuf chains for
   40  * the nfs op functions. They do things like create the rpc header and
   41  * copy data between mbuf chains and uio lists.
   42  */
   43 #include <fs/nfs/nfsport.h>
   44 
   45 extern u_int32_t newnfs_true, newnfs_false;
   46 extern int nfs_pubfhset;
   47 extern struct nfsclienthashhead nfsclienthash[NFSCLIENTHASHSIZE];
   48 extern struct nfslockhashhead nfslockhash[NFSLOCKHASHSIZE];
   49 extern int nfsrv_useacl;
   50 extern uid_t nfsrv_defaultuid;
   51 extern gid_t nfsrv_defaultgid;
   52 
   53 char nfs_v2pubfh[NFSX_V2FH];
   54 static nfstype newnfsv2_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK,
   55     NFNON, NFCHR, NFNON };
   56 extern nfstype nfsv34_type[9];
   57 #endif  /* !APPLEKEXT */
   58 
   59 SYSCTL_DECL(_vfs_nfsd);
   60 
   61 static int      disable_checkutf8 = 0;
   62 SYSCTL_INT(_vfs_nfsd, OID_AUTO, disable_checkutf8, CTLFLAG_RW,
   63     &disable_checkutf8, 0,
   64     "Disable the NFSv4 check for a UTF8 compliant name");
   65 
   66 static char nfsrv_hexdigit(char, int *);
   67 
   68 /*
   69  * Maps errno values to nfs error numbers.
   70  * Use NFSERR_IO as the catch all for ones not specifically defined in
   71  * RFC 1094.
   72  */
   73 static u_char nfsrv_v2errmap[ELAST] = {
   74   NFSERR_PERM,  NFSERR_NOENT,   NFSERR_IO,      NFSERR_IO,      NFSERR_IO,
   75   NFSERR_NXIO,  NFSERR_IO,      NFSERR_IO,      NFSERR_IO,      NFSERR_IO,
   76   NFSERR_IO,    NFSERR_IO,      NFSERR_ACCES,   NFSERR_IO,      NFSERR_IO,
   77   NFSERR_IO,    NFSERR_EXIST,   NFSERR_IO,      NFSERR_NODEV,   NFSERR_NOTDIR,
   78   NFSERR_ISDIR, NFSERR_IO,      NFSERR_IO,      NFSERR_IO,      NFSERR_IO,
   79   NFSERR_IO,    NFSERR_FBIG,    NFSERR_NOSPC,   NFSERR_IO,      NFSERR_ROFS,
   80   NFSERR_IO,    NFSERR_IO,      NFSERR_IO,      NFSERR_IO,      NFSERR_IO,
   81   NFSERR_IO,    NFSERR_IO,      NFSERR_IO,      NFSERR_IO,      NFSERR_IO,
   82   NFSERR_IO,    NFSERR_IO,      NFSERR_IO,      NFSERR_IO,      NFSERR_IO,
   83   NFSERR_IO,    NFSERR_IO,      NFSERR_IO,      NFSERR_IO,      NFSERR_IO,
   84   NFSERR_IO,    NFSERR_IO,      NFSERR_IO,      NFSERR_IO,      NFSERR_IO,
   85   NFSERR_IO,    NFSERR_IO,      NFSERR_IO,      NFSERR_IO,      NFSERR_IO,
   86   NFSERR_IO,    NFSERR_IO,      NFSERR_NAMETOL, NFSERR_IO,      NFSERR_IO,
   87   NFSERR_NOTEMPTY, NFSERR_IO,   NFSERR_IO,      NFSERR_DQUOT,   NFSERR_STALE,
   88   NFSERR_IO,    NFSERR_IO,      NFSERR_IO,      NFSERR_IO,      NFSERR_IO,
   89   NFSERR_IO,    NFSERR_IO,      NFSERR_IO,      NFSERR_IO,      NFSERR_IO,
   90   NFSERR_IO,
   91 };
   92 
   93 /*
   94  * Maps errno values to nfs error numbers.
   95  * Although it is not obvious whether or not NFS clients really care if
   96  * a returned error value is in the specified list for the procedure, the
   97  * safest thing to do is filter them appropriately. For Version 2, the
   98  * X/Open XNFS document is the only specification that defines error values
   99  * for each RPC (The RFC simply lists all possible error values for all RPCs),
  100  * so I have decided to not do this for Version 2.
  101  * The first entry is the default error return and the rest are the valid
  102  * errors for that RPC in increasing numeric order.
  103  */
  104 static short nfsv3err_null[] = {
  105         0,
  106         0,
  107 };
  108 
  109 static short nfsv3err_getattr[] = {
  110         NFSERR_IO,
  111         NFSERR_IO,
  112         NFSERR_STALE,
  113         NFSERR_BADHANDLE,
  114         NFSERR_SERVERFAULT,
  115         NFSERR_DELAY,
  116         0,
  117 };
  118 
  119 static short nfsv3err_setattr[] = {
  120         NFSERR_IO,
  121         NFSERR_ACCES,
  122         NFSERR_PERM,
  123         NFSERR_IO,
  124         NFSERR_INVAL,
  125         NFSERR_NOSPC,
  126         NFSERR_ROFS,
  127         NFSERR_DQUOT,
  128         NFSERR_STALE,
  129         NFSERR_BADHANDLE,
  130         NFSERR_NOT_SYNC,
  131         NFSERR_SERVERFAULT,
  132         NFSERR_DELAY,
  133         0,
  134 };
  135 
  136 static short nfsv3err_lookup[] = {
  137         NFSERR_IO,
  138         NFSERR_NOENT,
  139         NFSERR_ACCES,
  140         NFSERR_NAMETOL,
  141         NFSERR_IO,
  142         NFSERR_NOTDIR,
  143         NFSERR_STALE,
  144         NFSERR_BADHANDLE,
  145         NFSERR_SERVERFAULT,
  146         NFSERR_DELAY,
  147         0,
  148 };
  149 
  150 static short nfsv3err_access[] = {
  151         NFSERR_IO,
  152         NFSERR_IO,
  153         NFSERR_STALE,
  154         NFSERR_BADHANDLE,
  155         NFSERR_SERVERFAULT,
  156         NFSERR_DELAY,
  157         0,
  158 };
  159 
  160 static short nfsv3err_readlink[] = {
  161         NFSERR_IO,
  162         NFSERR_IO,
  163         NFSERR_ACCES,
  164         NFSERR_INVAL,
  165         NFSERR_STALE,
  166         NFSERR_BADHANDLE,
  167         NFSERR_NOTSUPP,
  168         NFSERR_SERVERFAULT,
  169         NFSERR_DELAY,
  170         0,
  171 };
  172 
  173 static short nfsv3err_read[] = {
  174         NFSERR_IO,
  175         NFSERR_IO,
  176         NFSERR_NXIO,
  177         NFSERR_ACCES,
  178         NFSERR_INVAL,
  179         NFSERR_STALE,
  180         NFSERR_BADHANDLE,
  181         NFSERR_SERVERFAULT,
  182         NFSERR_DELAY,
  183         0,
  184 };
  185 
  186 static short nfsv3err_write[] = {
  187         NFSERR_IO,
  188         NFSERR_IO,
  189         NFSERR_ACCES,
  190         NFSERR_NOSPC,
  191         NFSERR_INVAL,
  192         NFSERR_FBIG,
  193         NFSERR_ROFS,
  194         NFSERR_DQUOT,
  195         NFSERR_STALE,
  196         NFSERR_BADHANDLE,
  197         NFSERR_SERVERFAULT,
  198         NFSERR_DELAY,
  199         0,
  200 };
  201 
  202 static short nfsv3err_create[] = {
  203         NFSERR_IO,
  204         NFSERR_EXIST,
  205         NFSERR_NAMETOL,
  206         NFSERR_ACCES,
  207         NFSERR_IO,
  208         NFSERR_NOTDIR,
  209         NFSERR_NOSPC,
  210         NFSERR_ROFS,
  211         NFSERR_DQUOT,
  212         NFSERR_STALE,
  213         NFSERR_BADHANDLE,
  214         NFSERR_NOTSUPP,
  215         NFSERR_SERVERFAULT,
  216         NFSERR_DELAY,
  217         0,
  218 };
  219 
  220 static short nfsv3err_mkdir[] = {
  221         NFSERR_IO,
  222         NFSERR_EXIST,
  223         NFSERR_ACCES,
  224         NFSERR_NAMETOL,
  225         NFSERR_IO,
  226         NFSERR_NOTDIR,
  227         NFSERR_NOSPC,
  228         NFSERR_ROFS,
  229         NFSERR_DQUOT,
  230         NFSERR_STALE,
  231         NFSERR_BADHANDLE,
  232         NFSERR_NOTSUPP,
  233         NFSERR_SERVERFAULT,
  234         NFSERR_DELAY,
  235         0,
  236 };
  237 
  238 static short nfsv3err_symlink[] = {
  239         NFSERR_IO,
  240         NFSERR_ACCES,
  241         NFSERR_EXIST,
  242         NFSERR_NAMETOL,
  243         NFSERR_NOSPC,
  244         NFSERR_IO,
  245         NFSERR_NOTDIR,
  246         NFSERR_ROFS,
  247         NFSERR_DQUOT,
  248         NFSERR_STALE,
  249         NFSERR_BADHANDLE,
  250         NFSERR_NOTSUPP,
  251         NFSERR_SERVERFAULT,
  252         NFSERR_DELAY,
  253         0,
  254 };
  255 
  256 static short nfsv3err_mknod[] = {
  257         NFSERR_IO,
  258         NFSERR_ACCES,
  259         NFSERR_EXIST,
  260         NFSERR_NAMETOL,
  261         NFSERR_NOSPC,
  262         NFSERR_IO,
  263         NFSERR_NOTDIR,
  264         NFSERR_ROFS,
  265         NFSERR_DQUOT,
  266         NFSERR_STALE,
  267         NFSERR_BADHANDLE,
  268         NFSERR_NOTSUPP,
  269         NFSERR_SERVERFAULT,
  270         NFSERR_DELAY,
  271         NFSERR_BADTYPE,
  272         0,
  273 };
  274 
  275 static short nfsv3err_remove[] = {
  276         NFSERR_IO,
  277         NFSERR_NOENT,
  278         NFSERR_ACCES,
  279         NFSERR_NAMETOL,
  280         NFSERR_IO,
  281         NFSERR_NOTDIR,
  282         NFSERR_ROFS,
  283         NFSERR_STALE,
  284         NFSERR_BADHANDLE,
  285         NFSERR_SERVERFAULT,
  286         NFSERR_DELAY,
  287         0,
  288 };
  289 
  290 static short nfsv3err_rmdir[] = {
  291         NFSERR_IO,
  292         NFSERR_NOENT,
  293         NFSERR_ACCES,
  294         NFSERR_NOTDIR,
  295         NFSERR_NAMETOL,
  296         NFSERR_IO,
  297         NFSERR_EXIST,
  298         NFSERR_INVAL,
  299         NFSERR_ROFS,
  300         NFSERR_NOTEMPTY,
  301         NFSERR_STALE,
  302         NFSERR_BADHANDLE,
  303         NFSERR_NOTSUPP,
  304         NFSERR_SERVERFAULT,
  305         NFSERR_DELAY,
  306         0,
  307 };
  308 
  309 static short nfsv3err_rename[] = {
  310         NFSERR_IO,
  311         NFSERR_NOENT,
  312         NFSERR_ACCES,
  313         NFSERR_EXIST,
  314         NFSERR_NAMETOL,
  315         NFSERR_XDEV,
  316         NFSERR_IO,
  317         NFSERR_NOTDIR,
  318         NFSERR_ISDIR,
  319         NFSERR_INVAL,
  320         NFSERR_NOSPC,
  321         NFSERR_ROFS,
  322         NFSERR_MLINK,
  323         NFSERR_NOTEMPTY,
  324         NFSERR_DQUOT,
  325         NFSERR_STALE,
  326         NFSERR_BADHANDLE,
  327         NFSERR_NOTSUPP,
  328         NFSERR_SERVERFAULT,
  329         NFSERR_DELAY,
  330         0,
  331 };
  332 
  333 static short nfsv3err_link[] = {
  334         NFSERR_IO,
  335         NFSERR_ACCES,
  336         NFSERR_EXIST,
  337         NFSERR_NAMETOL,
  338         NFSERR_IO,
  339         NFSERR_XDEV,
  340         NFSERR_NOTDIR,
  341         NFSERR_INVAL,
  342         NFSERR_NOSPC,
  343         NFSERR_ROFS,
  344         NFSERR_MLINK,
  345         NFSERR_DQUOT,
  346         NFSERR_STALE,
  347         NFSERR_BADHANDLE,
  348         NFSERR_NOTSUPP,
  349         NFSERR_SERVERFAULT,
  350         NFSERR_DELAY,
  351         0,
  352 };
  353 
  354 static short nfsv3err_readdir[] = {
  355         NFSERR_IO,
  356         NFSERR_ACCES,
  357         NFSERR_NOTDIR,
  358         NFSERR_IO,
  359         NFSERR_STALE,
  360         NFSERR_BADHANDLE,
  361         NFSERR_BAD_COOKIE,
  362         NFSERR_TOOSMALL,
  363         NFSERR_SERVERFAULT,
  364         NFSERR_DELAY,
  365         0,
  366 };
  367 
  368 static short nfsv3err_readdirplus[] = {
  369         NFSERR_IO,
  370         NFSERR_ACCES,
  371         NFSERR_NOTDIR,
  372         NFSERR_IO,
  373         NFSERR_STALE,
  374         NFSERR_BADHANDLE,
  375         NFSERR_BAD_COOKIE,
  376         NFSERR_NOTSUPP,
  377         NFSERR_TOOSMALL,
  378         NFSERR_SERVERFAULT,
  379         NFSERR_DELAY,
  380         0,
  381 };
  382 
  383 static short nfsv3err_fsstat[] = {
  384         NFSERR_IO,
  385         NFSERR_IO,
  386         NFSERR_STALE,
  387         NFSERR_BADHANDLE,
  388         NFSERR_SERVERFAULT,
  389         NFSERR_DELAY,
  390         0,
  391 };
  392 
  393 static short nfsv3err_fsinfo[] = {
  394         NFSERR_STALE,
  395         NFSERR_STALE,
  396         NFSERR_BADHANDLE,
  397         NFSERR_SERVERFAULT,
  398         NFSERR_DELAY,
  399         0,
  400 };
  401 
  402 static short nfsv3err_pathconf[] = {
  403         NFSERR_STALE,
  404         NFSERR_STALE,
  405         NFSERR_BADHANDLE,
  406         NFSERR_SERVERFAULT,
  407         NFSERR_DELAY,
  408         0,
  409 };
  410 
  411 static short nfsv3err_commit[] = {
  412         NFSERR_IO,
  413         NFSERR_IO,
  414         NFSERR_STALE,
  415         NFSERR_BADHANDLE,
  416         NFSERR_SERVERFAULT,
  417         NFSERR_DELAY,
  418         0,
  419 };
  420 
  421 static short *nfsrv_v3errmap[] = {
  422         nfsv3err_null,
  423         nfsv3err_getattr,
  424         nfsv3err_setattr,
  425         nfsv3err_lookup,
  426         nfsv3err_access,
  427         nfsv3err_readlink,
  428         nfsv3err_read,
  429         nfsv3err_write,
  430         nfsv3err_create,
  431         nfsv3err_mkdir,
  432         nfsv3err_symlink,
  433         nfsv3err_mknod,
  434         nfsv3err_remove,
  435         nfsv3err_rmdir,
  436         nfsv3err_rename,
  437         nfsv3err_link,
  438         nfsv3err_readdir,
  439         nfsv3err_readdirplus,
  440         nfsv3err_fsstat,
  441         nfsv3err_fsinfo,
  442         nfsv3err_pathconf,
  443         nfsv3err_commit,
  444 };
  445 
  446 /*
  447  * And the same for V4.
  448  */
  449 static short nfsv4err_null[] = {
  450         0,
  451         0,
  452 };
  453 
  454 static short nfsv4err_access[] = {
  455         NFSERR_IO,
  456         NFSERR_ACCES,
  457         NFSERR_BADHANDLE,
  458         NFSERR_BADXDR,
  459         NFSERR_DELAY,
  460         NFSERR_FHEXPIRED,
  461         NFSERR_INVAL,
  462         NFSERR_IO,
  463         NFSERR_MOVED,
  464         NFSERR_NOFILEHANDLE,
  465         NFSERR_RESOURCE,
  466         NFSERR_SERVERFAULT,
  467         NFSERR_STALE,
  468         0,
  469 };
  470 
  471 static short nfsv4err_close[] = {
  472         NFSERR_EXPIRED,
  473         NFSERR_ADMINREVOKED,
  474         NFSERR_BADHANDLE,
  475         NFSERR_BADSEQID,
  476         NFSERR_BADSTATEID,
  477         NFSERR_BADXDR,
  478         NFSERR_DELAY,
  479         NFSERR_EXPIRED,
  480         NFSERR_FHEXPIRED,
  481         NFSERR_INVAL,
  482         NFSERR_ISDIR,
  483         NFSERR_LEASEMOVED,
  484         NFSERR_LOCKSHELD,
  485         NFSERR_MOVED,
  486         NFSERR_NOFILEHANDLE,
  487         NFSERR_OLDSTATEID,
  488         NFSERR_RESOURCE,
  489         NFSERR_SERVERFAULT,
  490         NFSERR_STALE,
  491         NFSERR_STALESTATEID,
  492         0,
  493 };
  494 
  495 static short nfsv4err_commit[] = {
  496         NFSERR_IO,
  497         NFSERR_ACCES,
  498         NFSERR_BADHANDLE,
  499         NFSERR_BADXDR,
  500         NFSERR_FHEXPIRED,
  501         NFSERR_INVAL,
  502         NFSERR_IO,
  503         NFSERR_ISDIR,
  504         NFSERR_MOVED,
  505         NFSERR_NOFILEHANDLE,
  506         NFSERR_RESOURCE,
  507         NFSERR_ROFS,
  508         NFSERR_SERVERFAULT,
  509         NFSERR_STALE,
  510         0,
  511 };
  512 
  513 static short nfsv4err_create[] = {
  514         NFSERR_IO,
  515         NFSERR_ACCES,
  516         NFSERR_ATTRNOTSUPP,
  517         NFSERR_BADCHAR,
  518         NFSERR_BADHANDLE,
  519         NFSERR_BADNAME,
  520         NFSERR_BADOWNER,
  521         NFSERR_BADTYPE,
  522         NFSERR_BADXDR,
  523         NFSERR_DELAY,
  524         NFSERR_DQUOT,
  525         NFSERR_EXIST,
  526         NFSERR_FHEXPIRED,
  527         NFSERR_INVAL,
  528         NFSERR_IO,
  529         NFSERR_MOVED,
  530         NFSERR_NAMETOL,
  531         NFSERR_NOFILEHANDLE,
  532         NFSERR_NOSPC,
  533         NFSERR_NOTDIR,
  534         NFSERR_PERM,
  535         NFSERR_RESOURCE,
  536         NFSERR_ROFS,
  537         NFSERR_SERVERFAULT,
  538         NFSERR_STALE,
  539         0,
  540 };
  541 
  542 static short nfsv4err_delegpurge[] = {
  543         NFSERR_SERVERFAULT,
  544         NFSERR_BADXDR,
  545         NFSERR_NOTSUPP,
  546         NFSERR_LEASEMOVED,
  547         NFSERR_MOVED,
  548         NFSERR_RESOURCE,
  549         NFSERR_SERVERFAULT,
  550         NFSERR_STALECLIENTID,
  551         0,
  552 };
  553 
  554 static short nfsv4err_delegreturn[] = {
  555         NFSERR_SERVERFAULT,
  556         NFSERR_ADMINREVOKED,
  557         NFSERR_BADSTATEID,
  558         NFSERR_BADXDR,
  559         NFSERR_EXPIRED,
  560         NFSERR_INVAL,
  561         NFSERR_LEASEMOVED,
  562         NFSERR_MOVED,
  563         NFSERR_NOFILEHANDLE,
  564         NFSERR_NOTSUPP,
  565         NFSERR_OLDSTATEID,
  566         NFSERR_RESOURCE,
  567         NFSERR_SERVERFAULT,
  568         NFSERR_STALE,
  569         NFSERR_STALESTATEID,
  570         0,
  571 };
  572 
  573 static short nfsv4err_getattr[] = {
  574         NFSERR_IO,
  575         NFSERR_ACCES,
  576         NFSERR_BADHANDLE,
  577         NFSERR_BADXDR,
  578         NFSERR_DELAY,
  579         NFSERR_FHEXPIRED,
  580         NFSERR_INVAL,
  581         NFSERR_IO,
  582         NFSERR_MOVED,
  583         NFSERR_NOFILEHANDLE,
  584         NFSERR_RESOURCE,
  585         NFSERR_SERVERFAULT,
  586         NFSERR_STALE,
  587         0,
  588 };
  589 
  590 static short nfsv4err_getfh[] = {
  591         NFSERR_BADHANDLE,
  592         NFSERR_BADHANDLE,
  593         NFSERR_FHEXPIRED,
  594         NFSERR_MOVED,
  595         NFSERR_NOFILEHANDLE,
  596         NFSERR_RESOURCE,
  597         NFSERR_SERVERFAULT,
  598         NFSERR_STALE,
  599         0,
  600 };
  601 
  602 static short nfsv4err_link[] = {
  603         NFSERR_IO,
  604         NFSERR_ACCES,
  605         NFSERR_BADCHAR,
  606         NFSERR_BADHANDLE,
  607         NFSERR_BADNAME,
  608         NFSERR_BADXDR,
  609         NFSERR_DELAY,
  610         NFSERR_DQUOT,
  611         NFSERR_EXIST,
  612         NFSERR_FHEXPIRED,
  613         NFSERR_FILEOPEN,
  614         NFSERR_INVAL,
  615         NFSERR_IO,
  616         NFSERR_ISDIR,
  617         NFSERR_MLINK,
  618         NFSERR_MOVED,
  619         NFSERR_NAMETOL,
  620         NFSERR_NOENT,
  621         NFSERR_NOFILEHANDLE,
  622         NFSERR_NOSPC,
  623         NFSERR_NOTDIR,
  624         NFSERR_NOTSUPP,
  625         NFSERR_RESOURCE,
  626         NFSERR_ROFS,
  627         NFSERR_SERVERFAULT,
  628         NFSERR_STALE,
  629         NFSERR_WRONGSEC,
  630         NFSERR_XDEV,
  631         0,
  632 };
  633 
  634 static short nfsv4err_lock[] = {
  635         NFSERR_SERVERFAULT,
  636         NFSERR_ACCES,
  637         NFSERR_ADMINREVOKED,
  638         NFSERR_BADHANDLE,
  639         NFSERR_BADRANGE,
  640         NFSERR_BADSEQID,
  641         NFSERR_BADSTATEID,
  642         NFSERR_BADXDR,
  643         NFSERR_DEADLOCK,
  644         NFSERR_DELAY,
  645         NFSERR_DENIED,
  646         NFSERR_EXPIRED,
  647         NFSERR_FHEXPIRED,
  648         NFSERR_GRACE,
  649         NFSERR_INVAL,
  650         NFSERR_ISDIR,
  651         NFSERR_LEASEMOVED,
  652         NFSERR_LOCKNOTSUPP,
  653         NFSERR_LOCKRANGE,
  654         NFSERR_MOVED,
  655         NFSERR_NOFILEHANDLE,
  656         NFSERR_NOGRACE,
  657         NFSERR_OLDSTATEID,
  658         NFSERR_OPENMODE,
  659         NFSERR_RECLAIMBAD,
  660         NFSERR_RECLAIMCONFLICT,
  661         NFSERR_RESOURCE,
  662         NFSERR_SERVERFAULT,
  663         NFSERR_STALE,
  664         NFSERR_STALECLIENTID,
  665         NFSERR_STALESTATEID,
  666         0,
  667 };
  668 
  669 static short nfsv4err_lockt[] = {
  670         NFSERR_SERVERFAULT,
  671         NFSERR_ACCES,
  672         NFSERR_BADHANDLE,
  673         NFSERR_BADRANGE,
  674         NFSERR_BADXDR,
  675         NFSERR_DELAY,
  676         NFSERR_DENIED,
  677         NFSERR_FHEXPIRED,
  678         NFSERR_GRACE,
  679         NFSERR_INVAL,
  680         NFSERR_ISDIR,
  681         NFSERR_LEASEMOVED,
  682         NFSERR_LOCKRANGE,
  683         NFSERR_MOVED,
  684         NFSERR_NOFILEHANDLE,
  685         NFSERR_RESOURCE,
  686         NFSERR_SERVERFAULT,
  687         NFSERR_STALE,
  688         NFSERR_STALECLIENTID,
  689         0,
  690 };
  691 
  692 static short nfsv4err_locku[] = {
  693         NFSERR_SERVERFAULT,
  694         NFSERR_ACCES,
  695         NFSERR_ADMINREVOKED,
  696         NFSERR_BADHANDLE,
  697         NFSERR_BADRANGE,
  698         NFSERR_BADSEQID,
  699         NFSERR_BADSTATEID,
  700         NFSERR_BADXDR,
  701         NFSERR_EXPIRED,
  702         NFSERR_FHEXPIRED,
  703         NFSERR_GRACE,
  704         NFSERR_INVAL,
  705         NFSERR_ISDIR,
  706         NFSERR_LEASEMOVED,
  707         NFSERR_LOCKRANGE,
  708         NFSERR_MOVED,
  709         NFSERR_NOFILEHANDLE,
  710         NFSERR_OLDSTATEID,
  711         NFSERR_RESOURCE,
  712         NFSERR_SERVERFAULT,
  713         NFSERR_STALE,
  714         NFSERR_STALESTATEID,
  715         0,
  716 };
  717 
  718 static short nfsv4err_lookup[] = {
  719         NFSERR_IO,
  720         NFSERR_ACCES,
  721         NFSERR_BADCHAR,
  722         NFSERR_BADHANDLE,
  723         NFSERR_BADNAME,
  724         NFSERR_BADXDR,
  725         NFSERR_FHEXPIRED,
  726         NFSERR_INVAL,
  727         NFSERR_IO,
  728         NFSERR_MOVED,
  729         NFSERR_NAMETOL,
  730         NFSERR_NOENT,
  731         NFSERR_NOFILEHANDLE,
  732         NFSERR_NOTDIR,
  733         NFSERR_RESOURCE,
  734         NFSERR_SERVERFAULT,
  735         NFSERR_STALE,
  736         NFSERR_SYMLINK,
  737         NFSERR_WRONGSEC,
  738         0,
  739 };
  740 
  741 static short nfsv4err_lookupp[] = {
  742         NFSERR_IO,
  743         NFSERR_ACCES,
  744         NFSERR_BADHANDLE,
  745         NFSERR_FHEXPIRED,
  746         NFSERR_IO,
  747         NFSERR_MOVED,
  748         NFSERR_NOENT,
  749         NFSERR_NOFILEHANDLE,
  750         NFSERR_NOTDIR,
  751         NFSERR_RESOURCE,
  752         NFSERR_SERVERFAULT,
  753         NFSERR_STALE,
  754         0,
  755 };
  756 
  757 static short nfsv4err_nverify[] = {
  758         NFSERR_IO,
  759         NFSERR_ACCES,
  760         NFSERR_ATTRNOTSUPP,
  761         NFSERR_BADCHAR,
  762         NFSERR_BADHANDLE,
  763         NFSERR_BADXDR,
  764         NFSERR_DELAY,
  765         NFSERR_FHEXPIRED,
  766         NFSERR_INVAL,
  767         NFSERR_IO,
  768         NFSERR_MOVED,
  769         NFSERR_NOFILEHANDLE,
  770         NFSERR_RESOURCE,
  771         NFSERR_SAME,
  772         NFSERR_SERVERFAULT,
  773         NFSERR_STALE,
  774         0,
  775 };
  776 
  777 static short nfsv4err_open[] = {
  778         NFSERR_IO,
  779         NFSERR_ACCES,
  780         NFSERR_ADMINREVOKED,
  781         NFSERR_ATTRNOTSUPP,
  782         NFSERR_BADCHAR,
  783         NFSERR_BADHANDLE,
  784         NFSERR_BADNAME,
  785         NFSERR_BADOWNER,
  786         NFSERR_BADSEQID,
  787         NFSERR_BADXDR,
  788         NFSERR_DELAY,
  789         NFSERR_DQUOT,
  790         NFSERR_EXIST,
  791         NFSERR_EXPIRED,
  792         NFSERR_FHEXPIRED,
  793         NFSERR_GRACE,
  794         NFSERR_IO,
  795         NFSERR_INVAL,
  796         NFSERR_ISDIR,
  797         NFSERR_LEASEMOVED,
  798         NFSERR_MOVED,
  799         NFSERR_NAMETOL,
  800         NFSERR_NOENT,
  801         NFSERR_NOFILEHANDLE,
  802         NFSERR_NOGRACE,
  803         NFSERR_NOSPC,
  804         NFSERR_NOTDIR,
  805         NFSERR_NOTSUPP,
  806         NFSERR_PERM,
  807         NFSERR_RECLAIMBAD,
  808         NFSERR_RECLAIMCONFLICT,
  809         NFSERR_RESOURCE,
  810         NFSERR_ROFS,
  811         NFSERR_SERVERFAULT,
  812         NFSERR_SHAREDENIED,
  813         NFSERR_STALE,
  814         NFSERR_STALECLIENTID,
  815         NFSERR_SYMLINK,
  816         NFSERR_WRONGSEC,
  817         0,
  818 };
  819 
  820 static short nfsv4err_openattr[] = {
  821         NFSERR_IO,
  822         NFSERR_ACCES,
  823         NFSERR_BADHANDLE,
  824         NFSERR_BADXDR,
  825         NFSERR_DELAY,
  826         NFSERR_DQUOT,
  827         NFSERR_FHEXPIRED,
  828         NFSERR_IO,
  829         NFSERR_MOVED,
  830         NFSERR_NOENT,
  831         NFSERR_NOFILEHANDLE,
  832         NFSERR_NOSPC,
  833         NFSERR_NOTSUPP,
  834         NFSERR_RESOURCE,
  835         NFSERR_ROFS,
  836         NFSERR_SERVERFAULT,
  837         NFSERR_STALE,
  838         0,
  839 };
  840 
  841 static short nfsv4err_openconfirm[] = {
  842         NFSERR_SERVERFAULT,
  843         NFSERR_ADMINREVOKED,
  844         NFSERR_BADHANDLE,
  845         NFSERR_BADSEQID,
  846         NFSERR_BADSTATEID,
  847         NFSERR_BADXDR,
  848         NFSERR_EXPIRED,
  849         NFSERR_FHEXPIRED,
  850         NFSERR_INVAL,
  851         NFSERR_ISDIR,
  852         NFSERR_MOVED,
  853         NFSERR_NOFILEHANDLE,
  854         NFSERR_OLDSTATEID,
  855         NFSERR_RESOURCE,
  856         NFSERR_SERVERFAULT,
  857         NFSERR_STALE,
  858         NFSERR_STALESTATEID,
  859         0,
  860 };
  861 
  862 static short nfsv4err_opendowngrade[] = {
  863         NFSERR_SERVERFAULT,
  864         NFSERR_ADMINREVOKED,
  865         NFSERR_BADHANDLE,
  866         NFSERR_BADSEQID,
  867         NFSERR_BADSTATEID,
  868         NFSERR_BADXDR,
  869         NFSERR_EXPIRED,
  870         NFSERR_FHEXPIRED,
  871         NFSERR_INVAL,
  872         NFSERR_MOVED,
  873         NFSERR_NOFILEHANDLE,
  874         NFSERR_OLDSTATEID,
  875         NFSERR_RESOURCE,
  876         NFSERR_SERVERFAULT,
  877         NFSERR_STALE,
  878         NFSERR_STALESTATEID,
  879         0,
  880 };
  881 
  882 static short nfsv4err_putfh[] = {
  883         NFSERR_SERVERFAULT,
  884         NFSERR_BADHANDLE,
  885         NFSERR_BADXDR,
  886         NFSERR_FHEXPIRED,
  887         NFSERR_MOVED,
  888         NFSERR_RESOURCE,
  889         NFSERR_SERVERFAULT,
  890         NFSERR_STALE,
  891         NFSERR_WRONGSEC,
  892         0,
  893 };
  894 
  895 static short nfsv4err_putpubfh[] = {
  896         NFSERR_SERVERFAULT,
  897         NFSERR_RESOURCE,
  898         NFSERR_SERVERFAULT,
  899         NFSERR_WRONGSEC,
  900         0,
  901 };
  902 
  903 static short nfsv4err_putrootfh[] = {
  904         NFSERR_SERVERFAULT,
  905         NFSERR_RESOURCE,
  906         NFSERR_SERVERFAULT,
  907         NFSERR_WRONGSEC,
  908         0,
  909 };
  910 
  911 static short nfsv4err_read[] = {
  912         NFSERR_IO,
  913         NFSERR_ACCES,
  914         NFSERR_ADMINREVOKED,
  915         NFSERR_BADHANDLE,
  916         NFSERR_BADSTATEID,
  917         NFSERR_BADXDR,
  918         NFSERR_DELAY,
  919         NFSERR_EXPIRED,
  920         NFSERR_FHEXPIRED,
  921         NFSERR_GRACE,
  922         NFSERR_IO,
  923         NFSERR_INVAL,
  924         NFSERR_ISDIR,
  925         NFSERR_LEASEMOVED,
  926         NFSERR_LOCKED,
  927         NFSERR_MOVED,
  928         NFSERR_NOFILEHANDLE,
  929         NFSERR_NXIO,
  930         NFSERR_OLDSTATEID,
  931         NFSERR_OPENMODE,
  932         NFSERR_RESOURCE,
  933         NFSERR_SERVERFAULT,
  934         NFSERR_STALE,
  935         NFSERR_STALESTATEID,
  936         0,
  937 };
  938 
  939 static short nfsv4err_readdir[] = {
  940         NFSERR_IO,
  941         NFSERR_ACCES,
  942         NFSERR_BADHANDLE,
  943         NFSERR_BAD_COOKIE,
  944         NFSERR_BADXDR,
  945         NFSERR_DELAY,
  946         NFSERR_FHEXPIRED,
  947         NFSERR_INVAL,
  948         NFSERR_IO,
  949         NFSERR_MOVED,
  950         NFSERR_NOFILEHANDLE,
  951         NFSERR_NOTDIR,
  952         NFSERR_NOTSAME,
  953         NFSERR_RESOURCE,
  954         NFSERR_SERVERFAULT,
  955         NFSERR_STALE,
  956         NFSERR_TOOSMALL,
  957         0,
  958 };
  959 
  960 static short nfsv4err_readlink[] = {
  961         NFSERR_IO,
  962         NFSERR_ACCES,
  963         NFSERR_BADHANDLE,
  964         NFSERR_DELAY,
  965         NFSERR_FHEXPIRED,
  966         NFSERR_INVAL,
  967         NFSERR_IO,
  968         NFSERR_ISDIR,
  969         NFSERR_MOVED,
  970         NFSERR_NOFILEHANDLE,
  971         NFSERR_NOTSUPP,
  972         NFSERR_RESOURCE,
  973         NFSERR_SERVERFAULT,
  974         NFSERR_STALE,
  975         0,
  976 };
  977 
  978 static short nfsv4err_remove[] = {
  979         NFSERR_IO,
  980         NFSERR_ACCES,
  981         NFSERR_BADCHAR,
  982         NFSERR_BADHANDLE,
  983         NFSERR_BADNAME,
  984         NFSERR_BADXDR,
  985         NFSERR_DELAY,
  986         NFSERR_FHEXPIRED,
  987         NFSERR_FILEOPEN,
  988         NFSERR_INVAL,
  989         NFSERR_IO,
  990         NFSERR_MOVED,
  991         NFSERR_NAMETOL,
  992         NFSERR_NOENT,
  993         NFSERR_NOFILEHANDLE,
  994         NFSERR_NOTDIR,
  995         NFSERR_NOTEMPTY,
  996         NFSERR_RESOURCE,
  997         NFSERR_ROFS,
  998         NFSERR_SERVERFAULT,
  999         NFSERR_STALE,
 1000         0,
 1001 };
 1002 
 1003 static short nfsv4err_rename[] = {
 1004         NFSERR_IO,
 1005         NFSERR_ACCES,
 1006         NFSERR_BADCHAR,
 1007         NFSERR_BADHANDLE,
 1008         NFSERR_BADNAME,
 1009         NFSERR_BADXDR,
 1010         NFSERR_DELAY,
 1011         NFSERR_DQUOT,
 1012         NFSERR_EXIST,
 1013         NFSERR_FHEXPIRED,
 1014         NFSERR_FILEOPEN,
 1015         NFSERR_INVAL,
 1016         NFSERR_IO,
 1017         NFSERR_MOVED,
 1018         NFSERR_NAMETOL,
 1019         NFSERR_NOENT,
 1020         NFSERR_NOFILEHANDLE,
 1021         NFSERR_NOSPC,
 1022         NFSERR_NOTDIR,
 1023         NFSERR_NOTEMPTY,
 1024         NFSERR_RESOURCE,
 1025         NFSERR_ROFS,
 1026         NFSERR_SERVERFAULT,
 1027         NFSERR_STALE,
 1028         NFSERR_WRONGSEC,
 1029         NFSERR_XDEV,
 1030         0,
 1031 };
 1032 
 1033 static short nfsv4err_renew[] = {
 1034         NFSERR_SERVERFAULT,
 1035         NFSERR_ACCES,
 1036         NFSERR_ADMINREVOKED,
 1037         NFSERR_BADXDR,
 1038         NFSERR_CBPATHDOWN,
 1039         NFSERR_EXPIRED,
 1040         NFSERR_LEASEMOVED,
 1041         NFSERR_RESOURCE,
 1042         NFSERR_SERVERFAULT,
 1043         NFSERR_STALECLIENTID,
 1044         0,
 1045 };
 1046 
 1047 static short nfsv4err_restorefh[] = {
 1048         NFSERR_SERVERFAULT,
 1049         NFSERR_BADHANDLE,
 1050         NFSERR_FHEXPIRED,
 1051         NFSERR_MOVED,
 1052         NFSERR_RESOURCE,
 1053         NFSERR_RESTOREFH,
 1054         NFSERR_SERVERFAULT,
 1055         NFSERR_STALE,
 1056         NFSERR_WRONGSEC,
 1057         0,
 1058 };
 1059 
 1060 static short nfsv4err_savefh[] = {
 1061         NFSERR_SERVERFAULT,
 1062         NFSERR_BADHANDLE,
 1063         NFSERR_FHEXPIRED,
 1064         NFSERR_MOVED,
 1065         NFSERR_NOFILEHANDLE,
 1066         NFSERR_RESOURCE,
 1067         NFSERR_SERVERFAULT,
 1068         NFSERR_STALE,
 1069         0,
 1070 };
 1071 
 1072 static short nfsv4err_secinfo[] = {
 1073         NFSERR_SERVERFAULT,
 1074         NFSERR_ACCES,
 1075         NFSERR_BADCHAR,
 1076         NFSERR_BADHANDLE,
 1077         NFSERR_BADNAME,
 1078         NFSERR_BADXDR,
 1079         NFSERR_FHEXPIRED,
 1080         NFSERR_INVAL,
 1081         NFSERR_MOVED,
 1082         NFSERR_NAMETOL,
 1083         NFSERR_NOENT,
 1084         NFSERR_NOFILEHANDLE,
 1085         NFSERR_NOTDIR,
 1086         NFSERR_RESOURCE,
 1087         NFSERR_SERVERFAULT,
 1088         NFSERR_STALE,
 1089         0,
 1090 };
 1091 
 1092 static short nfsv4err_setattr[] = {
 1093         NFSERR_IO,
 1094         NFSERR_ACCES,
 1095         NFSERR_ADMINREVOKED,
 1096         NFSERR_ATTRNOTSUPP,
 1097         NFSERR_BADCHAR,
 1098         NFSERR_BADHANDLE,
 1099         NFSERR_BADOWNER,
 1100         NFSERR_BADSTATEID,
 1101         NFSERR_BADXDR,
 1102         NFSERR_DELAY,
 1103         NFSERR_DQUOT,
 1104         NFSERR_EXPIRED,
 1105         NFSERR_FBIG,
 1106         NFSERR_FHEXPIRED,
 1107         NFSERR_GRACE,
 1108         NFSERR_INVAL,
 1109         NFSERR_IO,
 1110         NFSERR_ISDIR,
 1111         NFSERR_LOCKED,
 1112         NFSERR_MOVED,
 1113         NFSERR_NOFILEHANDLE,
 1114         NFSERR_NOSPC,
 1115         NFSERR_OLDSTATEID,
 1116         NFSERR_OPENMODE,
 1117         NFSERR_PERM,
 1118         NFSERR_RESOURCE,
 1119         NFSERR_ROFS,
 1120         NFSERR_SERVERFAULT,
 1121         NFSERR_STALE,
 1122         NFSERR_STALESTATEID,
 1123         0,
 1124 };
 1125 
 1126 static short nfsv4err_setclientid[] = {
 1127         NFSERR_SERVERFAULT,
 1128         NFSERR_BADXDR,
 1129         NFSERR_CLIDINUSE,
 1130         NFSERR_INVAL,
 1131         NFSERR_RESOURCE,
 1132         NFSERR_SERVERFAULT,
 1133         0,
 1134 };
 1135 
 1136 static short nfsv4err_setclientidconfirm[] = {
 1137         NFSERR_SERVERFAULT,
 1138         NFSERR_BADXDR,
 1139         NFSERR_CLIDINUSE,
 1140         NFSERR_RESOURCE,
 1141         NFSERR_SERVERFAULT,
 1142         NFSERR_STALECLIENTID,
 1143         0,
 1144 };
 1145 
 1146 static short nfsv4err_verify[] = {
 1147         NFSERR_SERVERFAULT,
 1148         NFSERR_ACCES,
 1149         NFSERR_ATTRNOTSUPP,
 1150         NFSERR_BADCHAR,
 1151         NFSERR_BADHANDLE,
 1152         NFSERR_BADXDR,
 1153         NFSERR_DELAY,
 1154         NFSERR_FHEXPIRED,
 1155         NFSERR_INVAL,
 1156         NFSERR_MOVED,
 1157         NFSERR_NOFILEHANDLE,
 1158         NFSERR_NOTSAME,
 1159         NFSERR_RESOURCE,
 1160         NFSERR_SERVERFAULT,
 1161         NFSERR_STALE,
 1162         0,
 1163 };
 1164 
 1165 static short nfsv4err_write[] = {
 1166         NFSERR_IO,
 1167         NFSERR_ACCES,
 1168         NFSERR_ADMINREVOKED,
 1169         NFSERR_BADHANDLE,
 1170         NFSERR_BADSTATEID,
 1171         NFSERR_BADXDR,
 1172         NFSERR_DELAY,
 1173         NFSERR_DQUOT,
 1174         NFSERR_EXPIRED,
 1175         NFSERR_FBIG,
 1176         NFSERR_FHEXPIRED,
 1177         NFSERR_GRACE,
 1178         NFSERR_INVAL,
 1179         NFSERR_IO,
 1180         NFSERR_ISDIR,
 1181         NFSERR_LEASEMOVED,
 1182         NFSERR_LOCKED,
 1183         NFSERR_MOVED,
 1184         NFSERR_NOFILEHANDLE,
 1185         NFSERR_NOSPC,
 1186         NFSERR_NXIO,
 1187         NFSERR_OLDSTATEID,
 1188         NFSERR_OPENMODE,
 1189         NFSERR_RESOURCE,
 1190         NFSERR_ROFS,
 1191         NFSERR_SERVERFAULT,
 1192         NFSERR_STALE,
 1193         NFSERR_STALESTATEID,
 1194         0,
 1195 };
 1196 
 1197 static short nfsv4err_releaselockowner[] = {
 1198         NFSERR_SERVERFAULT,
 1199         NFSERR_ADMINREVOKED,
 1200         NFSERR_BADXDR,
 1201         NFSERR_EXPIRED,
 1202         NFSERR_LEASEMOVED,
 1203         NFSERR_LOCKSHELD,
 1204         NFSERR_RESOURCE,
 1205         NFSERR_SERVERFAULT,
 1206         NFSERR_STALECLIENTID,
 1207         0,
 1208 };
 1209 
 1210 static short *nfsrv_v4errmap[] = {
 1211         nfsv4err_null,
 1212         nfsv4err_null,
 1213         nfsv4err_null,
 1214         nfsv4err_access,
 1215         nfsv4err_close,
 1216         nfsv4err_commit,
 1217         nfsv4err_create,
 1218         nfsv4err_delegpurge,
 1219         nfsv4err_delegreturn,
 1220         nfsv4err_getattr,
 1221         nfsv4err_getfh,
 1222         nfsv4err_link,
 1223         nfsv4err_lock,
 1224         nfsv4err_lockt,
 1225         nfsv4err_locku,
 1226         nfsv4err_lookup,
 1227         nfsv4err_lookupp,
 1228         nfsv4err_nverify,
 1229         nfsv4err_open,
 1230         nfsv4err_openattr,
 1231         nfsv4err_openconfirm,
 1232         nfsv4err_opendowngrade,
 1233         nfsv4err_putfh,
 1234         nfsv4err_putpubfh,
 1235         nfsv4err_putrootfh,
 1236         nfsv4err_read,
 1237         nfsv4err_readdir,
 1238         nfsv4err_readlink,
 1239         nfsv4err_remove,
 1240         nfsv4err_rename,
 1241         nfsv4err_renew,
 1242         nfsv4err_restorefh,
 1243         nfsv4err_savefh,
 1244         nfsv4err_secinfo,
 1245         nfsv4err_setattr,
 1246         nfsv4err_setclientid,
 1247         nfsv4err_setclientidconfirm,
 1248         nfsv4err_verify,
 1249         nfsv4err_write,
 1250         nfsv4err_releaselockowner,
 1251 };
 1252 
 1253 /*
 1254  * A fiddled version of m_adj() that ensures null fill to a long
 1255  * boundary and only trims off the back end
 1256  */
 1257 APPLESTATIC void
 1258 nfsrv_adj(mbuf_t mp, int len, int nul)
 1259 {
 1260         mbuf_t m;
 1261         int count, i;
 1262         char *cp;
 1263 
 1264         /*
 1265          * Trim from tail.  Scan the mbuf chain,
 1266          * calculating its length and finding the last mbuf.
 1267          * If the adjustment only affects this mbuf, then just
 1268          * adjust and return.  Otherwise, rescan and truncate
 1269          * after the remaining size.
 1270          */
 1271         count = 0;
 1272         m = mp;
 1273         for (;;) {
 1274                 count += mbuf_len(m);
 1275                 if (mbuf_next(m) == NULL)
 1276                         break;
 1277                 m = mbuf_next(m);
 1278         }
 1279         if (mbuf_len(m) > len) {
 1280                 mbuf_setlen(m, mbuf_len(m) - len);
 1281                 if (nul > 0) {
 1282                         cp = NFSMTOD(m, caddr_t) + mbuf_len(m) - nul;
 1283                         for (i = 0; i < nul; i++)
 1284                                 *cp++ = '\0';
 1285                 }
 1286                 return;
 1287         }
 1288         count -= len;
 1289         if (count < 0)
 1290                 count = 0;
 1291         /*
 1292          * Correct length for chain is "count".
 1293          * Find the mbuf with last data, adjust its length,
 1294          * and toss data from remaining mbufs on chain.
 1295          */
 1296         for (m = mp; m; m = mbuf_next(m)) {
 1297                 if (mbuf_len(m) >= count) {
 1298                         mbuf_setlen(m, count);
 1299                         if (nul > 0) {
 1300                                 cp = NFSMTOD(m, caddr_t) + mbuf_len(m) - nul;
 1301                                 for (i = 0; i < nul; i++)
 1302                                         *cp++ = '\0';
 1303                         }
 1304                         break;
 1305                 }
 1306                 count -= mbuf_len(m);
 1307         }
 1308         for (m = mbuf_next(m); m; m = mbuf_next(m))
 1309                 mbuf_setlen(m, 0);
 1310 }
 1311 
 1312 /*
 1313  * Make these functions instead of macros, so that the kernel text size
 1314  * doesn't get too big...
 1315  */
 1316 APPLESTATIC void
 1317 nfsrv_wcc(struct nfsrv_descript *nd, int before_ret,
 1318     struct nfsvattr *before_nvap, int after_ret, struct nfsvattr *after_nvap)
 1319 {
 1320         u_int32_t *tl;
 1321 
 1322         if (before_ret) {
 1323                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 1324                 *tl = newnfs_false;
 1325         } else {
 1326                 NFSM_BUILD(tl, u_int32_t *, 7 * NFSX_UNSIGNED);
 1327                 *tl++ = newnfs_true;
 1328                 txdr_hyper(before_nvap->na_size, tl);
 1329                 tl += 2;
 1330                 txdr_nfsv3time(&(before_nvap->na_mtime), tl);
 1331                 tl += 2;
 1332                 txdr_nfsv3time(&(before_nvap->na_ctime), tl);
 1333         }
 1334         nfsrv_postopattr(nd, after_ret, after_nvap);
 1335 }
 1336 
 1337 APPLESTATIC void
 1338 nfsrv_postopattr(struct nfsrv_descript *nd, int after_ret,
 1339     struct nfsvattr *after_nvap)
 1340 {
 1341         u_int32_t *tl;
 1342 
 1343         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 1344         if (after_ret)
 1345                 *tl = newnfs_false;
 1346         else {
 1347                 *tl = newnfs_true;
 1348                 nfsrv_fillattr(nd, after_nvap);
 1349         }
 1350 }
 1351 
 1352 /*
 1353  * Fill in file attributes for V2 and 3. For V4, call a separate
 1354  * routine that sifts through all the attribute bits.
 1355  */
 1356 APPLESTATIC void
 1357 nfsrv_fillattr(struct nfsrv_descript *nd, struct nfsvattr *nvap)
 1358 {
 1359         struct nfs_fattr *fp;
 1360         int fattr_size;
 1361 
 1362         /*
 1363          * Build space for the attribute structure.
 1364          */
 1365         if (nd->nd_flag & ND_NFSV3)
 1366                 fattr_size = NFSX_V3FATTR;
 1367         else
 1368                 fattr_size = NFSX_V2FATTR;
 1369         NFSM_BUILD(fp, struct nfs_fattr *, fattr_size);
 1370 
 1371         /*
 1372          * Now just fill it all in.
 1373          */
 1374         fp->fa_nlink = txdr_unsigned(nvap->na_nlink);
 1375         fp->fa_uid = txdr_unsigned(nvap->na_uid);
 1376         fp->fa_gid = txdr_unsigned(nvap->na_gid);
 1377         if (nd->nd_flag & ND_NFSV3) {
 1378                 fp->fa_type = vtonfsv34_type(nvap->na_type);
 1379                 fp->fa_mode = vtonfsv34_mode(nvap->na_mode);
 1380                 txdr_hyper(nvap->na_size, &fp->fa3_size);
 1381                 txdr_hyper(nvap->na_bytes, &fp->fa3_used);
 1382                 fp->fa3_rdev.specdata1 = txdr_unsigned(NFSMAJOR(nvap->na_rdev));
 1383                 fp->fa3_rdev.specdata2 = txdr_unsigned(NFSMINOR(nvap->na_rdev));
 1384                 fp->fa3_fsid.nfsuquad[0] = 0;
 1385                 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(nvap->na_fsid);
 1386                 fp->fa3_fileid.nfsuquad[0] = 0;
 1387                 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(nvap->na_fileid);
 1388                 txdr_nfsv3time(&nvap->na_atime, &fp->fa3_atime);
 1389                 txdr_nfsv3time(&nvap->na_mtime, &fp->fa3_mtime);
 1390                 txdr_nfsv3time(&nvap->na_ctime, &fp->fa3_ctime);
 1391         } else {
 1392                 fp->fa_type = vtonfsv2_type(nvap->na_type);
 1393                 fp->fa_mode = vtonfsv2_mode(nvap->na_type, nvap->na_mode);
 1394                 fp->fa2_size = txdr_unsigned(nvap->na_size);
 1395                 fp->fa2_blocksize = txdr_unsigned(nvap->na_blocksize);
 1396                 if (nvap->na_type == VFIFO)
 1397                         fp->fa2_rdev = 0xffffffff;
 1398                 else
 1399                         fp->fa2_rdev = txdr_unsigned(nvap->na_rdev);
 1400                 fp->fa2_blocks = txdr_unsigned(nvap->na_bytes / NFS_FABLKSIZE);
 1401                 fp->fa2_fsid = txdr_unsigned(nvap->na_fsid);
 1402                 fp->fa2_fileid = txdr_unsigned(nvap->na_fileid);
 1403                 txdr_nfsv2time(&nvap->na_atime, &fp->fa2_atime);
 1404                 txdr_nfsv2time(&nvap->na_mtime, &fp->fa2_mtime);
 1405                 txdr_nfsv2time(&nvap->na_ctime, &fp->fa2_ctime);
 1406         }
 1407 }
 1408 
 1409 /*
 1410  * This function gets a file handle out of an mbuf list.
 1411  * It returns 0 for success, EBADRPC otherwise.
 1412  * If sets the third flagp argument to 1 if the file handle is
 1413  * the public file handle.
 1414  * For NFSv4, if the length is incorrect, set nd_repstat == NFSERR_BADHANDLE
 1415  */
 1416 APPLESTATIC int
 1417 nfsrv_mtofh(struct nfsrv_descript *nd, struct nfsrvfh *fhp)
 1418 {
 1419         u_int32_t *tl;
 1420         int error = 0, len, copylen;
 1421 
 1422         if (nd->nd_flag & (ND_NFSV3 | ND_NFSV4)) {
 1423                 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 1424                 len = fxdr_unsigned(int, *tl);
 1425                 if (len == 0 && nfs_pubfhset && (nd->nd_flag & ND_NFSV3) &&
 1426                     nd->nd_procnum == NFSPROC_LOOKUP) {
 1427                         nd->nd_flag |= ND_PUBLOOKUP;
 1428                         goto nfsmout;
 1429                 }
 1430                 if (len < NFSRV_MINFH || len > NFSRV_MAXFH) {
 1431                         if (nd->nd_flag & ND_NFSV4) {
 1432                             if (len > 0 && len <= NFSX_V4FHMAX) {
 1433                                 error = nfsm_advance(nd, NFSM_RNDUP(len), -1);
 1434                                 if (error)
 1435                                         goto nfsmout;
 1436                                 nd->nd_repstat = NFSERR_BADHANDLE;
 1437                                 goto nfsmout;
 1438                             } else {
 1439                                     error = EBADRPC;
 1440                                     goto nfsmout;
 1441                             }
 1442                         } else {
 1443                                 error = EBADRPC;
 1444                                 goto nfsmout;
 1445                         }
 1446                 }
 1447                 copylen = len;
 1448         } else {
 1449                 /*
 1450                  * For NFSv2, the file handle is always 32 bytes on the
 1451                  * wire, but this server only cares about the first
 1452                  * NFSRV_MAXFH bytes.
 1453                  */
 1454                 len = NFSX_V2FH;
 1455                 copylen = NFSRV_MAXFH;
 1456         }
 1457         NFSM_DISSECT(tl, u_int32_t *, len);
 1458         if ((nd->nd_flag & ND_NFSV2) && nfs_pubfhset &&
 1459             nd->nd_procnum == NFSPROC_LOOKUP &&
 1460             !NFSBCMP((caddr_t)tl, nfs_v2pubfh, NFSX_V2FH)) {
 1461                 nd->nd_flag |= ND_PUBLOOKUP;
 1462                 goto nfsmout;
 1463         }
 1464         NFSBCOPY(tl, (caddr_t)fhp->nfsrvfh_data, copylen);
 1465         fhp->nfsrvfh_len = copylen;
 1466 nfsmout:
 1467         NFSEXITCODE2(error, nd);
 1468         return (error);
 1469 }
 1470 
 1471 /*
 1472  * Map errnos to NFS error numbers. For Version 3 and 4 also filter out error
 1473  * numbers not specified for the associated procedure.
 1474  * NFSPROC_NOOP is a special case, where the high order bits of nd_repstat
 1475  * should be cleared. NFSPROC_NOOP is used to return errors when a valid
 1476  * RPC procedure is not involved.
 1477  * Returns the error number in XDR.
 1478  */
 1479 APPLESTATIC int
 1480 nfsd_errmap(struct nfsrv_descript *nd)
 1481 {
 1482         short *defaulterrp, *errp;
 1483 
 1484         if (!nd->nd_repstat)
 1485                 return (0);
 1486         if (nd->nd_flag & (ND_NFSV3 | ND_NFSV4)) {
 1487                 if (nd->nd_procnum == NFSPROC_NOOP)
 1488                         return (txdr_unsigned(nd->nd_repstat & 0xffff));
 1489                 if (nd->nd_flag & ND_NFSV3)
 1490                     errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum];
 1491                 else if (nd->nd_repstat == EBADRPC)
 1492                         return (txdr_unsigned(NFSERR_BADXDR));
 1493                 else if (nd->nd_repstat == NFSERR_MINORVERMISMATCH ||
 1494                          nd->nd_repstat == NFSERR_OPILLEGAL)
 1495                         return (txdr_unsigned(nd->nd_repstat));
 1496                 else
 1497                     errp = defaulterrp = nfsrv_v4errmap[nd->nd_procnum];
 1498                 while (*++errp)
 1499                         if (*errp == nd->nd_repstat)
 1500                                 return (txdr_unsigned(nd->nd_repstat));
 1501                 return (txdr_unsigned(*defaulterrp));
 1502         }
 1503         if (nd->nd_repstat <= ELAST)
 1504                 return (txdr_unsigned(nfsrv_v2errmap[nd->nd_repstat - 1]));
 1505         return (txdr_unsigned(NFSERR_IO));
 1506 }
 1507 
 1508 /*
 1509  * Check to see if setting a uid/gid is permitted when creating a new
 1510  * file object. (Called when uid and/or gid is specified in the
 1511  * settable attributes for V4.
 1512  */
 1513 APPLESTATIC int
 1514 nfsrv_checkuidgid(struct nfsrv_descript *nd, struct nfsvattr *nvap)
 1515 {
 1516         int error = 0;
 1517 
 1518         /*
 1519          * If not setting either uid nor gid, it's OK.
 1520          */
 1521         if (NFSVNO_NOTSETUID(nvap) && NFSVNO_NOTSETGID(nvap))
 1522                 goto out;
 1523         if ((NFSVNO_ISSETUID(nvap) && nvap->na_uid == nfsrv_defaultuid)
 1524             || (NFSVNO_ISSETGID(nvap) && nvap->na_gid == nfsrv_defaultgid)) {
 1525                 error = NFSERR_BADOWNER;
 1526                 goto out;
 1527         }
 1528         if (nd->nd_cred->cr_uid == 0)
 1529                 goto out;
 1530         if ((NFSVNO_ISSETUID(nvap) && nvap->na_uid != nd->nd_cred->cr_uid) ||
 1531             (NFSVNO_ISSETGID(nvap) && nvap->na_gid != nd->nd_cred->cr_gid &&
 1532             !groupmember(nvap->na_gid, nd->nd_cred)))
 1533                 error = NFSERR_PERM;
 1534 
 1535 out:
 1536         NFSEXITCODE2(error, nd);
 1537         return (error);
 1538 }
 1539 
 1540 /*
 1541  * and this routine fixes up the settable attributes for V4 if allowed
 1542  * by nfsrv_checkuidgid().
 1543  */
 1544 APPLESTATIC void
 1545 nfsrv_fixattr(struct nfsrv_descript *nd, vnode_t vp,
 1546     struct nfsvattr *nvap, NFSACL_T *aclp, NFSPROC_T *p, nfsattrbit_t *attrbitp,
 1547     struct nfsexstuff *exp)
 1548 {
 1549         int change = 0;
 1550         struct nfsvattr nva;
 1551         uid_t tuid;
 1552         int error;
 1553         nfsattrbit_t nattrbits;
 1554 
 1555         /*
 1556          * Maybe this should be done for V2 and 3 but it never has been
 1557          * and nobody seems to be upset, so I think it's best not to change
 1558          * the V2 and 3 semantics.
 1559          */
 1560         if ((nd->nd_flag & ND_NFSV4) == 0)
 1561                 goto out;
 1562         NFSVNO_ATTRINIT(&nva);
 1563         NFSZERO_ATTRBIT(&nattrbits);
 1564         tuid = nd->nd_cred->cr_uid;
 1565         if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNER) &&
 1566             NFSVNO_ISSETUID(nvap) &&
 1567             nvap->na_uid != nd->nd_cred->cr_uid) {
 1568                 if (nd->nd_cred->cr_uid == 0) {
 1569                         nva.na_uid = nvap->na_uid;
 1570                         change++;
 1571                         NFSSETBIT_ATTRBIT(&nattrbits, NFSATTRBIT_OWNER);
 1572                 } else {
 1573                         NFSCLRBIT_ATTRBIT(attrbitp, NFSATTRBIT_OWNER);
 1574                 }
 1575         }
 1576         if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_TIMEACCESSSET) &&
 1577             NFSVNO_ISSETATIME(nvap)) {
 1578                 nva.na_atime = nvap->na_atime;
 1579                 change++;
 1580                 NFSSETBIT_ATTRBIT(&nattrbits, NFSATTRBIT_TIMEACCESSSET);
 1581         }
 1582         if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_TIMEMODIFYSET) &&
 1583             NFSVNO_ISSETMTIME(nvap)) {
 1584                 nva.na_mtime = nvap->na_mtime;
 1585                 change++;
 1586                 NFSSETBIT_ATTRBIT(&nattrbits, NFSATTRBIT_TIMEMODIFYSET);
 1587         }
 1588         if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNERGROUP) &&
 1589             NFSVNO_ISSETGID(nvap)) {
 1590                 if (nvap->na_gid == nd->nd_cred->cr_gid ||
 1591                     groupmember(nvap->na_gid, nd->nd_cred)) {
 1592                         nd->nd_cred->cr_uid = 0;
 1593                         nva.na_gid = nvap->na_gid;
 1594                         change++;
 1595                         NFSSETBIT_ATTRBIT(&nattrbits, NFSATTRBIT_OWNERGROUP);
 1596                 } else {
 1597                         NFSCLRBIT_ATTRBIT(attrbitp, NFSATTRBIT_OWNERGROUP);
 1598                 }
 1599         }
 1600         if (change) {
 1601                 error = nfsvno_setattr(vp, &nva, nd->nd_cred, p, exp);
 1602                 if (error) {
 1603                         NFSCLRALL_ATTRBIT(attrbitp, &nattrbits);
 1604                 }
 1605         }
 1606         if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SIZE) &&
 1607             NFSVNO_ISSETSIZE(nvap) && nvap->na_size != (u_quad_t)0) {
 1608                 NFSCLRBIT_ATTRBIT(attrbitp, NFSATTRBIT_SIZE);
 1609         }
 1610 #ifdef NFS4_ACL_EXTATTR_NAME
 1611         if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_ACL) &&
 1612             nfsrv_useacl != 0 && aclp != NULL) {
 1613                 if (aclp->acl_cnt > 0) {
 1614                         error = nfsrv_setacl(vp, aclp, nd->nd_cred, p);
 1615                         if (error) {
 1616                                 NFSCLRBIT_ATTRBIT(attrbitp, NFSATTRBIT_ACL);
 1617                         }
 1618                 }
 1619         } else
 1620 #endif
 1621         NFSCLRBIT_ATTRBIT(attrbitp, NFSATTRBIT_ACL);
 1622         nd->nd_cred->cr_uid = tuid;
 1623 
 1624 out:
 1625         NFSEXITCODE2(0, nd);
 1626 }
 1627 
 1628 /*
 1629  * Translate an ASCII hex digit to it's binary value. Return -1 if the
 1630  * char isn't a hex digit.
 1631  */
 1632 static char
 1633 nfsrv_hexdigit(char c, int *err)
 1634 {
 1635 
 1636         *err = 0;
 1637         if (c >= '' && c <= '9')
 1638                 return (c - '');
 1639         if (c >= 'a' && c <= 'f')
 1640                 return (c - 'a' + ((char)10));
 1641         if (c >= 'A' && c <= 'F')
 1642                 return (c - 'A' + ((char)10));
 1643         /* Not valid ! */
 1644         *err = 1;
 1645         return (1);     /* BOGUS */
 1646 }
 1647 
 1648 /*
 1649  * Check to see if NFSERR_MOVED can be returned for this op. Return 1 iff
 1650  * it can be.
 1651  */
 1652 APPLESTATIC int
 1653 nfsrv_errmoved(int op)
 1654 {
 1655         short *errp;
 1656 
 1657         errp = nfsrv_v4errmap[op];
 1658         while (*errp != 0) {
 1659                 if (*errp == NFSERR_MOVED)
 1660                         return (1);
 1661                 errp++;
 1662         }
 1663         return (0);
 1664 }
 1665 
 1666 /*
 1667  * Fill in attributes for a Referral.
 1668  * (Return the number of bytes of XDR created.)
 1669  */
 1670 APPLESTATIC int
 1671 nfsrv_putreferralattr(struct nfsrv_descript *nd, nfsattrbit_t *retbitp,
 1672     struct nfsreferral *refp, int getattr, int *reterrp)
 1673 {
 1674         u_int32_t *tl, *retnump;
 1675         u_char *cp, *cp2;
 1676         int prefixnum, retnum = 0, i, len, bitpos, rderrbit = 0, nonrefbit = 0;
 1677         int fslocationsbit = 0;
 1678         nfsattrbit_t tmpbits, refbits;
 1679 
 1680         NFSREFERRAL_ATTRBIT(&refbits);
 1681         if (getattr)
 1682                 NFSCLRBIT_ATTRBIT(&refbits, NFSATTRBIT_RDATTRERROR);
 1683         else if (NFSISSET_ATTRBIT(retbitp, NFSATTRBIT_RDATTRERROR))
 1684                 rderrbit = 1;
 1685         if (NFSISSET_ATTRBIT(retbitp, NFSATTRBIT_FSLOCATIONS))
 1686                 fslocationsbit = 1;
 1687 
 1688         /*
 1689          * Check for the case where unsupported referral attributes are
 1690          * requested.
 1691          */
 1692         NFSSET_ATTRBIT(&tmpbits, retbitp);
 1693         NFSCLRALL_ATTRBIT(&tmpbits, &refbits);
 1694         if (NFSNONZERO_ATTRBIT(&tmpbits))
 1695                 nonrefbit = 1;
 1696 
 1697         if (nonrefbit && !fslocationsbit && (getattr || !rderrbit)) {
 1698                 *reterrp = NFSERR_MOVED;
 1699                 return (0);
 1700         }
 1701 
 1702         /*
 1703          * Now we can fill in the attributes.
 1704          */
 1705         NFSSET_ATTRBIT(&tmpbits, retbitp);
 1706         NFSCLRNOT_ATTRBIT(&tmpbits, &refbits);
 1707 
 1708         /*
 1709          * Put out the attribute bitmap for the ones being filled in
 1710          * and get the field for the number of attributes returned.
 1711          */
 1712         prefixnum = nfsrv_putattrbit(nd, &tmpbits);
 1713         NFSM_BUILD(retnump, u_int32_t *, NFSX_UNSIGNED);
 1714         prefixnum += NFSX_UNSIGNED;
 1715 
 1716         /*
 1717          * Now, loop around filling in the attributes for each bit set.
 1718          */
 1719         for (bitpos = 0; bitpos < NFSATTRBIT_MAX; bitpos++) {
 1720             if (NFSISSET_ATTRBIT(&tmpbits, bitpos)) {
 1721                 switch (bitpos) {
 1722                 case NFSATTRBIT_TYPE:
 1723                         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 1724                         *tl = txdr_unsigned(NFDIR);
 1725                         retnum += NFSX_UNSIGNED;
 1726                         break;
 1727                 case NFSATTRBIT_FSID:
 1728                         NFSM_BUILD(tl, u_int32_t *, NFSX_V4FSID);
 1729                         *tl++ = 0;
 1730                         *tl++ = txdr_unsigned(NFSV4ROOT_FSID0);
 1731                         *tl++ = 0;
 1732                         *tl = txdr_unsigned(NFSV4ROOT_REFERRAL);
 1733                         retnum += NFSX_V4FSID;
 1734                         break;
 1735                 case NFSATTRBIT_RDATTRERROR:
 1736                         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 1737                         if (nonrefbit)
 1738                                 *tl = txdr_unsigned(NFSERR_MOVED);
 1739                         else
 1740                                 *tl = 0;
 1741                         retnum += NFSX_UNSIGNED;
 1742                         break;
 1743                 case NFSATTRBIT_FSLOCATIONS:
 1744                         retnum += nfsm_strtom(nd, "/", 1);
 1745                         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 1746                         *tl = txdr_unsigned(refp->nfr_srvcnt);
 1747                         retnum += NFSX_UNSIGNED;
 1748                         cp = refp->nfr_srvlist;
 1749                         for (i = 0; i < refp->nfr_srvcnt; i++) {
 1750                                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 1751                                 *tl = txdr_unsigned(1);
 1752                                 retnum += NFSX_UNSIGNED;
 1753                                 cp2 = STRCHR(cp, ':');
 1754                                 if (cp2 != NULL)
 1755                                         len = cp2 - cp;
 1756                                 else
 1757                                         len = 1;
 1758                                 retnum += nfsm_strtom(nd, cp, len);
 1759                                 if (cp2 != NULL)
 1760                                         cp = cp2 + 1;
 1761                                 cp2 = STRCHR(cp, ',');
 1762                                 if (cp2 != NULL)
 1763                                         len = cp2 - cp;
 1764                                 else
 1765                                         len = strlen(cp);
 1766                                 retnum += nfsm_strtom(nd, cp, len);
 1767                                 if (cp2 != NULL)
 1768                                         cp = cp2 + 1;
 1769                         }
 1770                         break;
 1771                 case NFSATTRBIT_MOUNTEDONFILEID:
 1772                         NFSM_BUILD(tl, u_int32_t *, NFSX_HYPER);
 1773                         *tl++ = 0;
 1774                         *tl = txdr_unsigned(refp->nfr_dfileno);
 1775                         retnum += NFSX_HYPER;
 1776                         break;
 1777                 default:
 1778                         printf("EEK! Bad V4 refattr bitpos=%d\n", bitpos);
 1779                 };
 1780             }
 1781         }
 1782         *retnump = txdr_unsigned(retnum);
 1783         return (retnum + prefixnum);
 1784 }
 1785 
 1786 /*
 1787  * Parse a file name out of a request.
 1788  */
 1789 APPLESTATIC int
 1790 nfsrv_parsename(struct nfsrv_descript *nd, char *bufp, u_long *hashp,
 1791     NFSPATHLEN_T *outlenp)
 1792 {
 1793         char *fromcp, *tocp, val = '\0';
 1794         mbuf_t md;
 1795         int i;
 1796         int rem, len, error = 0, pubtype = 0, outlen = 0, percent = 0;
 1797         char digit;
 1798         u_int32_t *tl;
 1799         u_long hash = 0;
 1800 
 1801         if (hashp != NULL)
 1802                 *hashp = 0;
 1803         tocp = bufp;
 1804         /*
 1805          * For V4, check for lookup parent.
 1806          * Otherwise, get the component name.
 1807          */
 1808         if ((nd->nd_flag & ND_NFSV4) && nd->nd_procnum == NFSV4OP_LOOKUPP) {
 1809             *tocp++ = '.';
 1810             hash += ((u_char)'.');
 1811             *tocp++ = '.';
 1812             hash += ((u_char)'.');
 1813             outlen = 2;
 1814         } else {
 1815             /*
 1816              * First, get the name length.
 1817              */
 1818             NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 1819             len = fxdr_unsigned(int, *tl);
 1820             if (len > NFS_MAXNAMLEN) {
 1821                 nd->nd_repstat = NFSERR_NAMETOL;
 1822                 error = 0;
 1823                 goto nfsmout;
 1824             } else if (len <= 0) {
 1825                 nd->nd_repstat = NFSERR_INVAL;
 1826                 error = 0;
 1827                 goto nfsmout;
 1828             }
 1829 
 1830             /*
 1831              * Now, copy the component name into the buffer.
 1832              */
 1833             fromcp = nd->nd_dpos;
 1834             md = nd->nd_md;
 1835             rem = NFSMTOD(md, caddr_t) + mbuf_len(md) - fromcp;
 1836             for (i = 0; i < len; i++) {
 1837                 while (rem == 0) {
 1838                         md = mbuf_next(md);
 1839                         if (md == NULL) {
 1840                                 error = EBADRPC;
 1841                                 goto nfsmout;
 1842                         }
 1843                         fromcp = NFSMTOD(md, caddr_t);
 1844                         rem = mbuf_len(md);
 1845                 }
 1846                 if (*fromcp == '\0') {
 1847                         nd->nd_repstat = EACCES;
 1848                         error = 0;
 1849                         goto nfsmout;
 1850                 }
 1851                 /*
 1852                  * For lookups on the public filehandle, do some special
 1853                  * processing on the name. (The public file handle is the
 1854                  * root of the public file system for this server.)
 1855                  */
 1856                 if (nd->nd_flag & ND_PUBLOOKUP) {
 1857                         /*
 1858                          * If the first char is ASCII, it is a canonical
 1859                          * path, otherwise it is a native path. (RFC2054
 1860                          * doesn't actually state what it is if the first
 1861                          * char isn't ASCII or 0x80, so I assume native.)
 1862                          * pubtype == 1 -> native path
 1863                          * pubtype == 2 -> canonical path
 1864                          */
 1865                         if (i == 0) {
 1866                                 if (*fromcp & 0x80) {
 1867                                         /*
 1868                                          * Since RFC2054 doesn't indicate
 1869                                          * that a native path of just 0x80
 1870                                          * isn't allowed, I'll replace the
 1871                                          * 0x80 with '/' instead of just
 1872                                          * throwing it away.
 1873                                          */
 1874                                         *fromcp = '/';
 1875                                         pubtype = 1;
 1876                                 } else {
 1877                                         pubtype = 2;
 1878                                 }
 1879                         }
 1880                         /*
 1881                          * '/' only allowed in a native path
 1882                          */
 1883                         if (*fromcp == '/' && pubtype != 1) {
 1884                                 nd->nd_repstat = EACCES;
 1885                                 error = 0;
 1886                                 goto nfsmout;
 1887                         }
 1888 
 1889                         /*
 1890                          * For the special case of 2 hex digits after a
 1891                          * '%' in an absolute path, calculate the value.
 1892                          * percent == 1 -> indicates "get first hex digit"
 1893                          * percent == 2 -> indicates "get second hex digit"
 1894                          */
 1895                         if (percent > 0) {
 1896                                 digit = nfsrv_hexdigit(*fromcp, &error);
 1897                                 if (error) {
 1898                                         nd->nd_repstat = EACCES;
 1899                                         error = 0;
 1900                                         goto nfsmout;
 1901                                 }
 1902                                 if (percent == 1) {
 1903                                         val = (digit << 4);
 1904                                         percent = 2;
 1905                                 } else {
 1906                                         val += digit;
 1907                                         percent = 0;
 1908                                         *tocp++ = val;
 1909                                         hash += ((u_char)val);
 1910                                         outlen++;
 1911                                 }
 1912                         } else {
 1913                                 if (*fromcp == '%' && pubtype == 2) {
 1914                                         /*
 1915                                          * Must be followed by 2 hex digits
 1916                                          */
 1917                                         if ((len - i) < 3) {
 1918                                                 nd->nd_repstat = EACCES;
 1919                                                 error = 0;
 1920                                                 goto nfsmout;
 1921                                         }
 1922                                         percent = 1;
 1923                                 } else {
 1924                                         *tocp++ = *fromcp;
 1925                                         hash += ((u_char)*fromcp);
 1926                                         outlen++;
 1927                                 }
 1928                         }
 1929                 } else {
 1930                         /*
 1931                          * Normal, non lookup on public, name.
 1932                          */
 1933                         if (*fromcp == '/') {
 1934                                 if (nd->nd_flag & ND_NFSV4)
 1935                                         nd->nd_repstat = NFSERR_BADNAME;
 1936                                 else
 1937                                         nd->nd_repstat = EACCES;
 1938                                 error = 0;
 1939                                 goto nfsmout;
 1940                         }
 1941                         hash += ((u_char)*fromcp);
 1942                         *tocp++ = *fromcp;
 1943                         outlen++;
 1944                 }
 1945                 fromcp++;
 1946                 rem--;
 1947             }
 1948             nd->nd_md = md;
 1949             nd->nd_dpos = fromcp;
 1950             i = NFSM_RNDUP(len) - len;
 1951             if (i > 0) {
 1952                 if (rem >= i) {
 1953                         nd->nd_dpos += i;
 1954                 } else {
 1955                         error = nfsm_advance(nd, i, rem);
 1956                         if (error)
 1957                                 goto nfsmout;
 1958                 }
 1959             }
 1960 
 1961             /*
 1962              * For v4, don't allow lookups of '.' or '..' and
 1963              * also check for non-utf8 strings.
 1964              */
 1965             if (nd->nd_flag & ND_NFSV4) {
 1966                 if ((outlen == 1 && bufp[0] == '.') ||
 1967                     (outlen == 2 && bufp[0] == '.' &&
 1968                      bufp[1] == '.')) {
 1969                     nd->nd_repstat = NFSERR_BADNAME;
 1970                     error = 0;
 1971                     goto nfsmout;
 1972                 }
 1973                 if (disable_checkutf8 == 0 &&
 1974                     nfsrv_checkutf8((u_int8_t *)bufp, outlen)) {
 1975                     nd->nd_repstat = NFSERR_INVAL;
 1976                     error = 0;
 1977                     goto nfsmout;
 1978                 }
 1979             }
 1980         }
 1981         *tocp = '\0';
 1982         *outlenp = (size_t)outlen;
 1983         if (hashp != NULL)
 1984                 *hashp = hash;
 1985 nfsmout:
 1986         NFSEXITCODE2(error, nd);
 1987         return (error);
 1988 }
 1989 
 1990 /*
 1991  * Check the tcp socket sequence number has been acknowledged.
 1992  */
 1993 int
 1994 nfsrv_checksockseqnum(struct socket *so, tcp_seq tcpseqval)
 1995 {
 1996         tcp_seq maxseq, unaseq;
 1997         int error, ret;
 1998 
 1999         error = nfsrv_getsocksndseq(so, &maxseq, &unaseq);
 2000         if (error)
 2001                 return (0);
 2002         ret = SEQ_GEQ(unaseq, tcpseqval);
 2003         return (ret);
 2004 }
 2005 
 2006 /*
 2007  * Get the tcp sequence number to be acknowledged.
 2008  */
 2009 int
 2010 nfsrv_getsockseqnum(struct socket *so, tcp_seq *tcpseqp)
 2011 {
 2012         tcp_seq maxseq, unaseq;
 2013         u_int sbcc;
 2014         int error;
 2015 
 2016         sbcc = so->so_snd.sb_cc;
 2017         error = nfsrv_getsocksndseq(so, &maxseq, &unaseq);
 2018         if (error)
 2019                 return (0);
 2020         /*
 2021          * Set the seq# to a value that will
 2022          * be at least the end of the reply.
 2023          * When this sequence# is acknowledged
 2024          * by the client, the client has received
 2025          * the reply.
 2026          */
 2027         *tcpseqp = sbcc + maxseq;
 2028         return (1);
 2029 }
 2030 
 2031 void
 2032 nfsd_init(void)
 2033 {
 2034         int i;
 2035         static int inited = 0;
 2036 
 2037         if (inited)
 2038                 return;
 2039         inited = 1;
 2040 
 2041         /*
 2042          * Initialize client queues. Don't free/reinitialize
 2043          * them when nfsds are restarted.
 2044          */
 2045         for (i = 0; i < NFSCLIENTHASHSIZE; i++)
 2046                 LIST_INIT(&nfsclienthash[i]);
 2047         for (i = 0; i < NFSLOCKHASHSIZE; i++)
 2048                 LIST_INIT(&nfslockhash[i]);
 2049 
 2050         /* and the v2 pubfh should be all zeros */
 2051         NFSBZERO(nfs_v2pubfh, NFSX_V2FH);
 2052 }
 2053 
 2054 /*
 2055  * Check the v4 root exports.
 2056  * Return 0 if ok, 1 otherwise.
 2057  */
 2058 int
 2059 nfsd_checkrootexp(struct nfsrv_descript *nd)
 2060 {
 2061 
 2062         if ((nd->nd_flag & (ND_GSS | ND_EXAUTHSYS)) == ND_EXAUTHSYS)
 2063                 return (0);
 2064         if ((nd->nd_flag & (ND_GSSINTEGRITY | ND_EXGSSINTEGRITY)) ==
 2065             (ND_GSSINTEGRITY | ND_EXGSSINTEGRITY))
 2066                 return (0);
 2067         if ((nd->nd_flag & (ND_GSSPRIVACY | ND_EXGSSPRIVACY)) ==
 2068             (ND_GSSPRIVACY | ND_EXGSSPRIVACY))
 2069                 return (0);
 2070         if ((nd->nd_flag & (ND_GSS | ND_GSSINTEGRITY | ND_GSSPRIVACY |
 2071              ND_EXGSS)) == (ND_GSS | ND_EXGSS))
 2072                 return (0);
 2073         return (1);
 2074 }
 2075 

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