sys/fs/nfsserver/nfs_nfsdsubs.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 1989, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Rick Macklem at The University of Guelph.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  */
  35
  36 #include <sys/cdefs.h>
  37 __FBSDID("$FreeBSD$");
  38
  39 /*
  40  * These functions support the macros and help fiddle mbuf chains for
  41  * the nfs op functions. They do things like create the rpc header and
  42  * copy data between mbuf chains and uio lists.
  43  */
  44 #include <fs/nfs/nfsport.h>
  45
  46 extern u_int32_t newnfs_true, newnfs_false;
  47 extern int nfs_pubfhset;
  48 extern struct nfsclienthashhead *nfsclienthash;
  49 extern int nfsrv_clienthashsize;
  50 extern struct nfslockhashhead *nfslockhash;
  51 extern int nfsrv_lockhashsize;
  52 extern struct nfssessionhash *nfssessionhash;
  53 extern int nfsrv_sessionhashsize;
  54 extern int nfsrv_useacl;
  55 extern uid_t nfsrv_defaultuid;
  56 extern gid_t nfsrv_defaultgid;
  57
  58 char nfs_v2pubfh[NFSX_V2FH];
  59 struct nfsdontlisthead nfsrv_dontlisthead;
  60 struct nfslayouthead nfsrv_recalllisthead;
  61 static nfstype newnfsv2_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK,
  62     NFNON, NFCHR, NFNON };
  63 extern nfstype nfsv34_type[9];
  64
  65 static u_int32_t nfsrv_isannfserr(u_int32_t);
  66
  67 SYSCTL_DECL(_vfs_nfsd);
  68
  69 static int      enable_checkutf8 = 1;
  70 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_checkutf8, CTLFLAG_RW,
  71     &enable_checkutf8, 0,
  72     "Enable the NFSv4 check for the UTF8 compliant name required by rfc3530");
  73
  74 static int    enable_nobodycheck = 1;
  75 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_nobodycheck, CTLFLAG_RW,
  76     &enable_nobodycheck, 0,
  77     "Enable the NFSv4 check when setting user nobody as owner");
  78
  79 static int    enable_nogroupcheck = 1;
  80 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_nogroupcheck, CTLFLAG_RW,
  81     &enable_nogroupcheck, 0,
  82     "Enable the NFSv4 check when setting group nogroup as owner");
  83
  84 static char nfsrv_hexdigit(char, int *);
  85
  86 /*
  87  * Maps errno values to nfs error numbers.
  88  * Use NFSERR_IO as the catch all for ones not specifically defined in
  89  * RFC 1094. (It now includes the errors added for NFSv3.)
  90  */
  91 static u_char nfsrv_v2errmap[NFSERR_REMOTE] = {
  92   NFSERR_PERM,  NFSERR_NOENT,   NFSERR_IO,      NFSERR_IO,      NFSERR_IO,
  93   NFSERR_NXIO,  NFSERR_IO,      NFSERR_IO,      NFSERR_IO,      NFSERR_IO,
  94   NFSERR_IO,    NFSERR_IO,      NFSERR_ACCES,   NFSERR_IO,      NFSERR_IO,
  95   NFSERR_IO,    NFSERR_EXIST,   NFSERR_XDEV,    NFSERR_NODEV,   NFSERR_NOTDIR,
  96   NFSERR_ISDIR, NFSERR_INVAL,   NFSERR_IO,      NFSERR_IO,      NFSERR_IO,
  97   NFSERR_IO,    NFSERR_FBIG,    NFSERR_NOSPC,   NFSERR_IO,      NFSERR_ROFS,
  98   NFSERR_MLINK, NFSERR_IO,      NFSERR_IO,      NFSERR_IO,      NFSERR_IO,
  99   NFSERR_IO,    NFSERR_IO,      NFSERR_IO,      NFSERR_IO,      NFSERR_IO,
 100   NFSERR_IO,    NFSERR_IO,      NFSERR_IO,      NFSERR_IO,      NFSERR_IO,
 101   NFSERR_IO,    NFSERR_IO,      NFSERR_IO,      NFSERR_IO,      NFSERR_IO,
 102   NFSERR_IO,    NFSERR_IO,      NFSERR_IO,      NFSERR_IO,      NFSERR_IO,
 103   NFSERR_IO,    NFSERR_IO,      NFSERR_IO,      NFSERR_IO,      NFSERR_IO,
 104   NFSERR_IO,    NFSERR_IO,      NFSERR_NAMETOL, NFSERR_IO,      NFSERR_IO,
 105   NFSERR_NOTEMPTY, NFSERR_IO,   NFSERR_IO,      NFSERR_DQUOT,   NFSERR_STALE,
 106   NFSERR_REMOTE,
 107 };
 108
 109 /*
 110  * Maps errno values to nfs error numbers.
 111  * Although it is not obvious whether or not NFS clients really care if
 112  * a returned error value is in the specified list for the procedure, the
 113  * safest thing to do is filter them appropriately. For Version 2, the
 114  * X/Open XNFS document is the only specification that defines error values
 115  * for each RPC (The RFC simply lists all possible error values for all RPCs),
 116  * so I have decided to not do this for Version 2.
 117  * The first entry is the default error return and the rest are the valid
 118  * errors for that RPC in increasing numeric order.
 119  */
 120 static short nfsv3err_null[] = {
 121         0,
 122         0,
 123 };
 124
 125 static short nfsv3err_getattr[] = {
 126         NFSERR_IO,
 127         NFSERR_IO,
 128         NFSERR_STALE,
 129         NFSERR_BADHANDLE,
 130         NFSERR_SERVERFAULT,
 131         NFSERR_DELAY,
 132         0,
 133 };
 134
 135 static short nfsv3err_setattr[] = {
 136         NFSERR_IO,
 137         NFSERR_ACCES,
 138         NFSERR_PERM,
 139         NFSERR_IO,
 140         NFSERR_INVAL,
 141         NFSERR_NOSPC,
 142         NFSERR_ROFS,
 143         NFSERR_DQUOT,
 144         NFSERR_STALE,
 145         NFSERR_BADHANDLE,
 146         NFSERR_NOT_SYNC,
 147         NFSERR_SERVERFAULT,
 148         NFSERR_DELAY,
 149         0,
 150 };
 151
 152 static short nfsv3err_lookup[] = {
 153         NFSERR_IO,
 154         NFSERR_NOENT,
 155         NFSERR_ACCES,
 156         NFSERR_NAMETOL,
 157         NFSERR_IO,
 158         NFSERR_NOTDIR,
 159         NFSERR_STALE,
 160         NFSERR_BADHANDLE,
 161         NFSERR_SERVERFAULT,
 162         NFSERR_DELAY,
 163         0,
 164 };
 165
 166 static short nfsv3err_access[] = {
 167         NFSERR_IO,
 168         NFSERR_IO,
 169         NFSERR_STALE,
 170         NFSERR_BADHANDLE,
 171         NFSERR_SERVERFAULT,
 172         NFSERR_DELAY,
 173         0,
 174 };
 175
 176 static short nfsv3err_readlink[] = {
 177         NFSERR_IO,
 178         NFSERR_IO,
 179         NFSERR_ACCES,
 180         NFSERR_INVAL,
 181         NFSERR_STALE,
 182         NFSERR_BADHANDLE,
 183         NFSERR_NOTSUPP,
 184         NFSERR_SERVERFAULT,
 185         NFSERR_DELAY,
 186         0,
 187 };
 188
 189 static short nfsv3err_read[] = {
 190         NFSERR_IO,
 191         NFSERR_IO,
 192         NFSERR_NXIO,
 193         NFSERR_ACCES,
 194         NFSERR_INVAL,
 195         NFSERR_STALE,
 196         NFSERR_BADHANDLE,
 197         NFSERR_SERVERFAULT,
 198         NFSERR_DELAY,
 199         0,
 200 };
 201
 202 static short nfsv3err_write[] = {
 203         NFSERR_IO,
 204         NFSERR_IO,
 205         NFSERR_ACCES,
 206         NFSERR_NOSPC,
 207         NFSERR_INVAL,
 208         NFSERR_FBIG,
 209         NFSERR_ROFS,
 210         NFSERR_DQUOT,
 211         NFSERR_STALE,
 212         NFSERR_BADHANDLE,
 213         NFSERR_SERVERFAULT,
 214         NFSERR_DELAY,
 215         0,
 216 };
 217
 218 static short nfsv3err_create[] = {
 219         NFSERR_IO,
 220         NFSERR_EXIST,
 221         NFSERR_NAMETOL,
 222         NFSERR_ACCES,
 223         NFSERR_IO,
 224         NFSERR_NOTDIR,
 225         NFSERR_NOSPC,
 226         NFSERR_ROFS,
 227         NFSERR_DQUOT,
 228         NFSERR_STALE,
 229         NFSERR_BADHANDLE,
 230         NFSERR_NOTSUPP,
 231         NFSERR_SERVERFAULT,
 232         NFSERR_DELAY,
 233         0,
 234 };
 235
 236 static short nfsv3err_mkdir[] = {
 237         NFSERR_IO,
 238         NFSERR_EXIST,
 239         NFSERR_ACCES,
 240         NFSERR_NAMETOL,
 241         NFSERR_IO,
 242         NFSERR_NOTDIR,
 243         NFSERR_NOSPC,
 244         NFSERR_ROFS,
 245         NFSERR_DQUOT,
 246         NFSERR_STALE,
 247         NFSERR_BADHANDLE,
 248         NFSERR_NOTSUPP,
 249         NFSERR_SERVERFAULT,
 250         NFSERR_DELAY,
 251         0,
 252 };
 253
 254 static short nfsv3err_symlink[] = {
 255         NFSERR_IO,
 256         NFSERR_ACCES,
 257         NFSERR_EXIST,
 258         NFSERR_NAMETOL,
 259         NFSERR_NOSPC,
 260         NFSERR_IO,
 261         NFSERR_NOTDIR,
 262         NFSERR_ROFS,
 263         NFSERR_DQUOT,
 264         NFSERR_STALE,
 265         NFSERR_BADHANDLE,
 266         NFSERR_NOTSUPP,
 267         NFSERR_SERVERFAULT,
 268         NFSERR_DELAY,
 269         0,
 270 };
 271
 272 static short nfsv3err_mknod[] = {
 273         NFSERR_IO,
 274         NFSERR_ACCES,
 275         NFSERR_EXIST,
 276         NFSERR_NAMETOL,
 277         NFSERR_NOSPC,
 278         NFSERR_IO,
 279         NFSERR_NOTDIR,
 280         NFSERR_ROFS,
 281         NFSERR_DQUOT,
 282         NFSERR_STALE,
 283         NFSERR_BADHANDLE,
 284         NFSERR_NOTSUPP,
 285         NFSERR_SERVERFAULT,
 286         NFSERR_DELAY,
 287         NFSERR_BADTYPE,
 288         0,
 289 };
 290
 291 static short nfsv3err_remove[] = {
 292         NFSERR_IO,
 293         NFSERR_NOENT,
 294         NFSERR_ACCES,
 295         NFSERR_NAMETOL,
 296         NFSERR_IO,
 297         NFSERR_NOTDIR,
 298         NFSERR_ROFS,
 299         NFSERR_STALE,
 300         NFSERR_BADHANDLE,
 301         NFSERR_SERVERFAULT,
 302         NFSERR_DELAY,
 303         0,
 304 };
 305
 306 static short nfsv3err_rmdir[] = {
 307         NFSERR_IO,
 308         NFSERR_NOENT,
 309         NFSERR_ACCES,
 310         NFSERR_NOTDIR,
 311         NFSERR_NAMETOL,
 312         NFSERR_IO,
 313         NFSERR_EXIST,
 314         NFSERR_INVAL,
 315         NFSERR_ROFS,
 316         NFSERR_NOTEMPTY,
 317         NFSERR_STALE,
 318         NFSERR_BADHANDLE,
 319         NFSERR_NOTSUPP,
 320         NFSERR_SERVERFAULT,
 321         NFSERR_DELAY,
 322         0,
 323 };
 324
 325 static short nfsv3err_rename[] = {
 326         NFSERR_IO,
 327         NFSERR_NOENT,
 328         NFSERR_ACCES,
 329         NFSERR_EXIST,
 330         NFSERR_NAMETOL,
 331         NFSERR_XDEV,
 332         NFSERR_IO,
 333         NFSERR_NOTDIR,
 334         NFSERR_ISDIR,
 335         NFSERR_INVAL,
 336         NFSERR_NOSPC,
 337         NFSERR_ROFS,
 338         NFSERR_MLINK,
 339         NFSERR_NOTEMPTY,
 340         NFSERR_DQUOT,
 341         NFSERR_STALE,
 342         NFSERR_BADHANDLE,
 343         NFSERR_NOTSUPP,
 344         NFSERR_SERVERFAULT,
 345         NFSERR_DELAY,
 346         0,
 347 };
 348
 349 static short nfsv3err_link[] = {
 350         NFSERR_IO,
 351         NFSERR_ACCES,
 352         NFSERR_EXIST,
 353         NFSERR_NAMETOL,
 354         NFSERR_IO,
 355         NFSERR_XDEV,
 356         NFSERR_NOTDIR,
 357         NFSERR_INVAL,
 358         NFSERR_NOSPC,
 359         NFSERR_ROFS,
 360         NFSERR_MLINK,
 361         NFSERR_DQUOT,
 362         NFSERR_STALE,
 363         NFSERR_BADHANDLE,
 364         NFSERR_NOTSUPP,
 365         NFSERR_SERVERFAULT,
 366         NFSERR_DELAY,
 367         0,
 368 };
 369
 370 static short nfsv3err_readdir[] = {
 371         NFSERR_IO,
 372         NFSERR_ACCES,
 373         NFSERR_NOTDIR,
 374         NFSERR_IO,
 375         NFSERR_STALE,
 376         NFSERR_BADHANDLE,
 377         NFSERR_BAD_COOKIE,
 378         NFSERR_TOOSMALL,
 379         NFSERR_SERVERFAULT,
 380         NFSERR_DELAY,
 381         0,
 382 };
 383
 384 static short nfsv3err_readdirplus[] = {
 385         NFSERR_IO,
 386         NFSERR_ACCES,
 387         NFSERR_NOTDIR,
 388         NFSERR_IO,
 389         NFSERR_STALE,
 390         NFSERR_BADHANDLE,
 391         NFSERR_BAD_COOKIE,
 392         NFSERR_NOTSUPP,
 393         NFSERR_TOOSMALL,
 394         NFSERR_SERVERFAULT,
 395         NFSERR_DELAY,
 396         0,
 397 };
 398
 399 static short nfsv3err_fsstat[] = {
 400         NFSERR_IO,
 401         NFSERR_IO,
 402         NFSERR_STALE,
 403         NFSERR_BADHANDLE,
 404         NFSERR_SERVERFAULT,
 405         NFSERR_DELAY,
 406         0,
 407 };
 408
 409 static short nfsv3err_fsinfo[] = {
 410         NFSERR_STALE,
 411         NFSERR_STALE,
 412         NFSERR_BADHANDLE,
 413         NFSERR_SERVERFAULT,
 414         NFSERR_DELAY,
 415         0,
 416 };
 417
 418 static short nfsv3err_pathconf[] = {
 419         NFSERR_STALE,
 420         NFSERR_STALE,
 421         NFSERR_BADHANDLE,
 422         NFSERR_SERVERFAULT,
 423         NFSERR_DELAY,
 424         0,
 425 };
 426
 427 static short nfsv3err_commit[] = {
 428         NFSERR_IO,
 429         NFSERR_IO,
 430         NFSERR_STALE,
 431         NFSERR_BADHANDLE,
 432         NFSERR_SERVERFAULT,
 433         NFSERR_DELAY,
 434         0,
 435 };
 436
 437 static short *nfsrv_v3errmap[] = {
 438         nfsv3err_null,
 439         nfsv3err_getattr,
 440         nfsv3err_setattr,
 441         nfsv3err_lookup,
 442         nfsv3err_access,
 443         nfsv3err_readlink,
 444         nfsv3err_read,
 445         nfsv3err_write,
 446         nfsv3err_create,
 447         nfsv3err_mkdir,
 448         nfsv3err_symlink,
 449         nfsv3err_mknod,
 450         nfsv3err_remove,
 451         nfsv3err_rmdir,
 452         nfsv3err_rename,
 453         nfsv3err_link,
 454         nfsv3err_readdir,
 455         nfsv3err_readdirplus,
 456         nfsv3err_fsstat,
 457         nfsv3err_fsinfo,
 458         nfsv3err_pathconf,
 459         nfsv3err_commit,
 460 };
 461
 462 /*
 463  * And the same for V4.
 464  */
 465 static short nfsv4err_null[] = {
 466         0,
 467         0,
 468 };
 469
 470 static short nfsv4err_access[] = {
 471         NFSERR_IO,
 472         NFSERR_ACCES,
 473         NFSERR_BADHANDLE,
 474         NFSERR_BADXDR,
 475         NFSERR_DELAY,
 476         NFSERR_FHEXPIRED,
 477         NFSERR_INVAL,
 478         NFSERR_IO,
 479         NFSERR_MOVED,
 480         NFSERR_NOFILEHANDLE,
 481         NFSERR_RESOURCE,
 482         NFSERR_SERVERFAULT,
 483         NFSERR_STALE,
 484         0,
 485 };
 486
 487 static short nfsv4err_close[] = {
 488         NFSERR_EXPIRED,
 489         NFSERR_ADMINREVOKED,
 490         NFSERR_BADHANDLE,
 491         NFSERR_BADSEQID,
 492         NFSERR_BADSTATEID,
 493         NFSERR_BADXDR,
 494         NFSERR_DELAY,
 495         NFSERR_EXPIRED,
 496         NFSERR_FHEXPIRED,
 497         NFSERR_INVAL,
 498         NFSERR_ISDIR,
 499         NFSERR_LEASEMOVED,
 500         NFSERR_LOCKSHELD,
 501         NFSERR_MOVED,
 502         NFSERR_NOFILEHANDLE,
 503         NFSERR_OLDSTATEID,
 504         NFSERR_RESOURCE,
 505         NFSERR_SERVERFAULT,
 506         NFSERR_STALE,
 507         NFSERR_STALESTATEID,
 508         0,
 509 };
 510
 511 static short nfsv4err_commit[] = {
 512         NFSERR_IO,
 513         NFSERR_ACCES,
 514         NFSERR_BADHANDLE,
 515         NFSERR_BADXDR,
 516         NFSERR_FHEXPIRED,
 517         NFSERR_INVAL,
 518         NFSERR_IO,
 519         NFSERR_ISDIR,
 520         NFSERR_MOVED,
 521         NFSERR_NOFILEHANDLE,
 522         NFSERR_RESOURCE,
 523         NFSERR_ROFS,
 524         NFSERR_SERVERFAULT,
 525         NFSERR_STALE,
 526         0,
 527 };
 528
 529 static short nfsv4err_create[] = {
 530         NFSERR_IO,
 531         NFSERR_ACCES,
 532         NFSERR_ATTRNOTSUPP,
 533         NFSERR_BADCHAR,
 534         NFSERR_BADHANDLE,
 535         NFSERR_BADNAME,
 536         NFSERR_BADOWNER,
 537         NFSERR_BADTYPE,
 538         NFSERR_BADXDR,
 539         NFSERR_DELAY,
 540         NFSERR_DQUOT,
 541         NFSERR_EXIST,
 542         NFSERR_FHEXPIRED,
 543         NFSERR_INVAL,
 544         NFSERR_IO,
 545         NFSERR_MOVED,
 546         NFSERR_NAMETOL,
 547         NFSERR_NOFILEHANDLE,
 548         NFSERR_NOSPC,
 549         NFSERR_NOTDIR,
 550         NFSERR_PERM,
 551         NFSERR_RESOURCE,
 552         NFSERR_ROFS,
 553         NFSERR_SERVERFAULT,
 554         NFSERR_STALE,
 555         0,
 556 };
 557
 558 static short nfsv4err_delegpurge[] = {
 559         NFSERR_SERVERFAULT,
 560         NFSERR_BADXDR,
 561         NFSERR_NOTSUPP,
 562         NFSERR_LEASEMOVED,
 563         NFSERR_MOVED,
 564         NFSERR_RESOURCE,
 565         NFSERR_SERVERFAULT,
 566         NFSERR_STALECLIENTID,
 567         0,
 568 };
 569
 570 static short nfsv4err_delegreturn[] = {
 571         NFSERR_SERVERFAULT,
 572         NFSERR_ADMINREVOKED,
 573         NFSERR_BADSTATEID,
 574         NFSERR_BADXDR,
 575         NFSERR_EXPIRED,
 576         NFSERR_INVAL,
 577         NFSERR_LEASEMOVED,
 578         NFSERR_MOVED,
 579         NFSERR_NOFILEHANDLE,
 580         NFSERR_NOTSUPP,
 581         NFSERR_OLDSTATEID,
 582         NFSERR_RESOURCE,
 583         NFSERR_SERVERFAULT,
 584         NFSERR_STALE,
 585         NFSERR_STALESTATEID,
 586         0,
 587 };
 588
 589 static short nfsv4err_getattr[] = {
 590         NFSERR_IO,
 591         NFSERR_ACCES,
 592         NFSERR_BADHANDLE,
 593         NFSERR_BADXDR,
 594         NFSERR_DELAY,
 595         NFSERR_FHEXPIRED,
 596         NFSERR_INVAL,
 597         NFSERR_IO,
 598         NFSERR_MOVED,
 599         NFSERR_NOFILEHANDLE,
 600         NFSERR_RESOURCE,
 601         NFSERR_SERVERFAULT,
 602         NFSERR_STALE,
 603         0,
 604 };
 605
 606 static short nfsv4err_getfh[] = {
 607         NFSERR_BADHANDLE,
 608         NFSERR_BADHANDLE,
 609         NFSERR_FHEXPIRED,
 610         NFSERR_MOVED,
 611         NFSERR_NOFILEHANDLE,
 612         NFSERR_RESOURCE,
 613         NFSERR_SERVERFAULT,
 614         NFSERR_STALE,
 615         0,
 616 };
 617
 618 static short nfsv4err_link[] = {
 619         NFSERR_IO,
 620         NFSERR_ACCES,
 621         NFSERR_BADCHAR,
 622         NFSERR_BADHANDLE,
 623         NFSERR_BADNAME,
 624         NFSERR_BADXDR,
 625         NFSERR_DELAY,
 626         NFSERR_DQUOT,
 627         NFSERR_EXIST,
 628         NFSERR_FHEXPIRED,
 629         NFSERR_FILEOPEN,
 630         NFSERR_INVAL,
 631         NFSERR_IO,
 632         NFSERR_ISDIR,
 633         NFSERR_MLINK,
 634         NFSERR_MOVED,
 635         NFSERR_NAMETOL,
 636         NFSERR_NOENT,
 637         NFSERR_NOFILEHANDLE,
 638         NFSERR_NOSPC,
 639         NFSERR_NOTDIR,
 640         NFSERR_NOTSUPP,
 641         NFSERR_RESOURCE,
 642         NFSERR_ROFS,
 643         NFSERR_SERVERFAULT,
 644         NFSERR_STALE,
 645         NFSERR_WRONGSEC,
 646         NFSERR_XDEV,
 647         0,
 648 };
 649
 650 static short nfsv4err_lock[] = {
 651         NFSERR_SERVERFAULT,
 652         NFSERR_ACCES,
 653         NFSERR_ADMINREVOKED,
 654         NFSERR_BADHANDLE,
 655         NFSERR_BADRANGE,
 656         NFSERR_BADSEQID,
 657         NFSERR_BADSTATEID,
 658         NFSERR_BADXDR,
 659         NFSERR_DEADLOCK,
 660         NFSERR_DELAY,
 661         NFSERR_DENIED,
 662         NFSERR_EXPIRED,
 663         NFSERR_FHEXPIRED,
 664         NFSERR_GRACE,
 665         NFSERR_INVAL,
 666         NFSERR_ISDIR,
 667         NFSERR_LEASEMOVED,
 668         NFSERR_LOCKNOTSUPP,
 669         NFSERR_LOCKRANGE,
 670         NFSERR_MOVED,
 671         NFSERR_NOFILEHANDLE,
 672         NFSERR_NOGRACE,
 673         NFSERR_OLDSTATEID,
 674         NFSERR_OPENMODE,
 675         NFSERR_RECLAIMBAD,
 676         NFSERR_RECLAIMCONFLICT,
 677         NFSERR_RESOURCE,
 678         NFSERR_SERVERFAULT,
 679         NFSERR_STALE,
 680         NFSERR_STALECLIENTID,
 681         NFSERR_STALESTATEID,
 682         0,
 683 };
 684
 685 static short nfsv4err_lockt[] = {
 686         NFSERR_SERVERFAULT,
 687         NFSERR_ACCES,
 688         NFSERR_BADHANDLE,
 689         NFSERR_BADRANGE,
 690         NFSERR_BADXDR,
 691         NFSERR_DELAY,
 692         NFSERR_DENIED,
 693         NFSERR_FHEXPIRED,
 694         NFSERR_GRACE,
 695         NFSERR_INVAL,
 696         NFSERR_ISDIR,
 697         NFSERR_LEASEMOVED,
 698         NFSERR_LOCKRANGE,
 699         NFSERR_MOVED,
 700         NFSERR_NOFILEHANDLE,
 701         NFSERR_RESOURCE,
 702         NFSERR_SERVERFAULT,
 703         NFSERR_STALE,
 704         NFSERR_STALECLIENTID,
 705         0,
 706 };
 707
 708 static short nfsv4err_locku[] = {
 709         NFSERR_SERVERFAULT,
 710         NFSERR_ACCES,
 711         NFSERR_ADMINREVOKED,
 712         NFSERR_BADHANDLE,
 713         NFSERR_BADRANGE,
 714         NFSERR_BADSEQID,
 715         NFSERR_BADSTATEID,
 716         NFSERR_BADXDR,
 717         NFSERR_EXPIRED,
 718         NFSERR_FHEXPIRED,
 719         NFSERR_GRACE,
 720         NFSERR_INVAL,
 721         NFSERR_ISDIR,
 722         NFSERR_LEASEMOVED,
 723         NFSERR_LOCKRANGE,
 724         NFSERR_MOVED,
 725         NFSERR_NOFILEHANDLE,
 726         NFSERR_OLDSTATEID,
 727         NFSERR_RESOURCE,
 728         NFSERR_SERVERFAULT,
 729         NFSERR_STALE,
 730         NFSERR_STALESTATEID,
 731         0,
 732 };
 733
 734 static short nfsv4err_lookup[] = {
 735         NFSERR_IO,
 736         NFSERR_ACCES,
 737         NFSERR_BADCHAR,
 738         NFSERR_BADHANDLE,
 739         NFSERR_BADNAME,
 740         NFSERR_BADXDR,
 741         NFSERR_FHEXPIRED,
 742         NFSERR_INVAL,
 743         NFSERR_IO,
 744         NFSERR_MOVED,
 745         NFSERR_NAMETOL,
 746         NFSERR_NOENT,
 747         NFSERR_NOFILEHANDLE,
 748         NFSERR_NOTDIR,
 749         NFSERR_RESOURCE,
 750         NFSERR_SERVERFAULT,
 751         NFSERR_STALE,
 752         NFSERR_SYMLINK,
 753         NFSERR_WRONGSEC,
 754         0,
 755 };
 756
 757 static short nfsv4err_lookupp[] = {
 758         NFSERR_IO,
 759         NFSERR_ACCES,
 760         NFSERR_BADHANDLE,
 761         NFSERR_FHEXPIRED,
 762         NFSERR_IO,
 763         NFSERR_MOVED,
 764         NFSERR_NOENT,
 765         NFSERR_NOFILEHANDLE,
 766         NFSERR_NOTDIR,
 767         NFSERR_RESOURCE,
 768         NFSERR_SERVERFAULT,
 769         NFSERR_STALE,
 770         0,
 771 };
 772
 773 static short nfsv4err_nverify[] = {
 774         NFSERR_IO,
 775         NFSERR_ACCES,
 776         NFSERR_ATTRNOTSUPP,
 777         NFSERR_BADCHAR,
 778         NFSERR_BADHANDLE,
 779         NFSERR_BADXDR,
 780         NFSERR_DELAY,
 781         NFSERR_FHEXPIRED,
 782         NFSERR_INVAL,
 783         NFSERR_IO,
 784         NFSERR_MOVED,
 785         NFSERR_NOFILEHANDLE,
 786         NFSERR_RESOURCE,
 787         NFSERR_SAME,
 788         NFSERR_SERVERFAULT,
 789         NFSERR_STALE,
 790         0,
 791 };
 792
 793 static short nfsv4err_open[] = {
 794         NFSERR_IO,
 795         NFSERR_ACCES,
 796         NFSERR_ADMINREVOKED,
 797         NFSERR_ATTRNOTSUPP,
 798         NFSERR_BADCHAR,
 799         NFSERR_BADHANDLE,
 800         NFSERR_BADNAME,
 801         NFSERR_BADOWNER,
 802         NFSERR_BADSEQID,
 803         NFSERR_BADXDR,
 804         NFSERR_DELAY,
 805         NFSERR_DQUOT,
 806         NFSERR_EXIST,
 807         NFSERR_EXPIRED,
 808         NFSERR_FHEXPIRED,
 809         NFSERR_GRACE,
 810         NFSERR_IO,
 811         NFSERR_INVAL,
 812         NFSERR_ISDIR,
 813         NFSERR_LEASEMOVED,
 814         NFSERR_MOVED,
 815         NFSERR_NAMETOL,
 816         NFSERR_NOENT,
 817         NFSERR_NOFILEHANDLE,
 818         NFSERR_NOGRACE,
 819         NFSERR_NOSPC,
 820         NFSERR_NOTDIR,
 821         NFSERR_NOTSUPP,
 822         NFSERR_PERM,
 823         NFSERR_RECLAIMBAD,
 824         NFSERR_RECLAIMCONFLICT,
 825         NFSERR_RESOURCE,
 826         NFSERR_ROFS,
 827         NFSERR_SERVERFAULT,
 828         NFSERR_SHAREDENIED,
 829         NFSERR_STALE,
 830         NFSERR_STALECLIENTID,
 831         NFSERR_SYMLINK,
 832         NFSERR_WRONGSEC,
 833         0,
 834 };
 835
 836 static short nfsv4err_openattr[] = {
 837         NFSERR_IO,
 838         NFSERR_ACCES,
 839         NFSERR_BADHANDLE,
 840         NFSERR_BADXDR,
 841         NFSERR_DELAY,
 842         NFSERR_DQUOT,
 843         NFSERR_FHEXPIRED,
 844         NFSERR_IO,
 845         NFSERR_MOVED,
 846         NFSERR_NOENT,
 847         NFSERR_NOFILEHANDLE,
 848         NFSERR_NOSPC,
 849         NFSERR_NOTSUPP,
 850         NFSERR_RESOURCE,
 851         NFSERR_ROFS,
 852         NFSERR_SERVERFAULT,
 853         NFSERR_STALE,
 854         0,
 855 };
 856
 857 static short nfsv4err_openconfirm[] = {
 858         NFSERR_SERVERFAULT,
 859         NFSERR_ADMINREVOKED,
 860         NFSERR_BADHANDLE,
 861         NFSERR_BADSEQID,
 862         NFSERR_BADSTATEID,
 863         NFSERR_BADXDR,
 864         NFSERR_EXPIRED,
 865         NFSERR_FHEXPIRED,
 866         NFSERR_INVAL,
 867         NFSERR_ISDIR,
 868         NFSERR_MOVED,
 869         NFSERR_NOFILEHANDLE,
 870         NFSERR_OLDSTATEID,
 871         NFSERR_RESOURCE,
 872         NFSERR_SERVERFAULT,
 873         NFSERR_STALE,
 874         NFSERR_STALESTATEID,
 875         0,
 876 };
 877
 878 static short nfsv4err_opendowngrade[] = {
 879         NFSERR_SERVERFAULT,
 880         NFSERR_ADMINREVOKED,
 881         NFSERR_BADHANDLE,
 882         NFSERR_BADSEQID,
 883         NFSERR_BADSTATEID,
 884         NFSERR_BADXDR,
 885         NFSERR_EXPIRED,
 886         NFSERR_FHEXPIRED,
 887         NFSERR_INVAL,
 888         NFSERR_MOVED,
 889         NFSERR_NOFILEHANDLE,
 890         NFSERR_OLDSTATEID,
 891         NFSERR_RESOURCE,
 892         NFSERR_SERVERFAULT,
 893         NFSERR_STALE,
 894         NFSERR_STALESTATEID,
 895         0,
 896 };
 897
 898 static short nfsv4err_putfh[] = {
 899         NFSERR_SERVERFAULT,
 900         NFSERR_BADHANDLE,
 901         NFSERR_BADXDR,
 902         NFSERR_FHEXPIRED,
 903         NFSERR_MOVED,
 904         NFSERR_RESOURCE,
 905         NFSERR_SERVERFAULT,
 906         NFSERR_STALE,
 907         NFSERR_WRONGSEC,
 908         0,
 909 };
 910
 911 static short nfsv4err_putpubfh[] = {
 912         NFSERR_SERVERFAULT,
 913         NFSERR_RESOURCE,
 914         NFSERR_SERVERFAULT,
 915         NFSERR_WRONGSEC,
 916         0,
 917 };
 918
 919 static short nfsv4err_putrootfh[] = {
 920         NFSERR_SERVERFAULT,
 921         NFSERR_RESOURCE,
 922         NFSERR_SERVERFAULT,
 923         NFSERR_WRONGSEC,
 924         0,
 925 };
 926
 927 static short nfsv4err_read[] = {
 928         NFSERR_IO,
 929         NFSERR_ACCES,
 930         NFSERR_ADMINREVOKED,
 931         NFSERR_BADHANDLE,
 932         NFSERR_BADSTATEID,
 933         NFSERR_BADXDR,
 934         NFSERR_DELAY,
 935         NFSERR_EXPIRED,
 936         NFSERR_FHEXPIRED,
 937         NFSERR_GRACE,
 938         NFSERR_IO,
 939         NFSERR_INVAL,
 940         NFSERR_ISDIR,
 941         NFSERR_LEASEMOVED,
 942         NFSERR_LOCKED,
 943         NFSERR_MOVED,
 944         NFSERR_NOFILEHANDLE,
 945         NFSERR_NXIO,
 946         NFSERR_OLDSTATEID,
 947         NFSERR_OPENMODE,
 948         NFSERR_RESOURCE,
 949         NFSERR_SERVERFAULT,
 950         NFSERR_STALE,
 951         NFSERR_STALESTATEID,
 952         0,
 953 };
 954
 955 static short nfsv4err_readdir[] = {
 956         NFSERR_IO,
 957         NFSERR_ACCES,
 958         NFSERR_BADHANDLE,
 959         NFSERR_BAD_COOKIE,
 960         NFSERR_BADXDR,
 961         NFSERR_DELAY,
 962         NFSERR_FHEXPIRED,
 963         NFSERR_INVAL,
 964         NFSERR_IO,
 965         NFSERR_MOVED,
 966         NFSERR_NOFILEHANDLE,
 967         NFSERR_NOTDIR,
 968         NFSERR_NOTSAME,
 969         NFSERR_RESOURCE,
 970         NFSERR_SERVERFAULT,
 971         NFSERR_STALE,
 972         NFSERR_TOOSMALL,
 973         0,
 974 };
 975
 976 static short nfsv4err_readlink[] = {
 977         NFSERR_IO,
 978         NFSERR_ACCES,
 979         NFSERR_BADHANDLE,
 980         NFSERR_DELAY,
 981         NFSERR_FHEXPIRED,
 982         NFSERR_INVAL,
 983         NFSERR_IO,
 984         NFSERR_ISDIR,
 985         NFSERR_MOVED,
 986         NFSERR_NOFILEHANDLE,
 987         NFSERR_NOTSUPP,
 988         NFSERR_RESOURCE,
 989         NFSERR_SERVERFAULT,
 990         NFSERR_STALE,
 991         0,
 992 };
 993
 994 static short nfsv4err_remove[] = {
 995         NFSERR_IO,
 996         NFSERR_ACCES,
 997         NFSERR_BADCHAR,
 998         NFSERR_BADHANDLE,
 999         NFSERR_BADNAME,
1000         NFSERR_BADXDR,
1001         NFSERR_DELAY,
1002         NFSERR_FHEXPIRED,
1003         NFSERR_FILEOPEN,
1004         NFSERR_INVAL,
1005         NFSERR_IO,
1006         NFSERR_MOVED,
1007         NFSERR_NAMETOL,
1008         NFSERR_NOENT,
1009         NFSERR_NOFILEHANDLE,
1010         NFSERR_NOTDIR,
1011         NFSERR_NOTEMPTY,
1012         NFSERR_RESOURCE,
1013         NFSERR_ROFS,
1014         NFSERR_SERVERFAULT,
1015         NFSERR_STALE,
1016         0,
1017 };
1018
1019 static short nfsv4err_rename[] = {
1020         NFSERR_IO,
1021         NFSERR_ACCES,
1022         NFSERR_BADCHAR,
1023         NFSERR_BADHANDLE,
1024         NFSERR_BADNAME,
1025         NFSERR_BADXDR,
1026         NFSERR_DELAY,
1027         NFSERR_DQUOT,
1028         NFSERR_EXIST,
1029         NFSERR_FHEXPIRED,
1030         NFSERR_FILEOPEN,
1031         NFSERR_INVAL,
1032         NFSERR_IO,
1033         NFSERR_MOVED,
1034         NFSERR_NAMETOL,
1035         NFSERR_NOENT,
1036         NFSERR_NOFILEHANDLE,
1037         NFSERR_NOSPC,
1038         NFSERR_NOTDIR,
1039         NFSERR_NOTEMPTY,
1040         NFSERR_RESOURCE,
1041         NFSERR_ROFS,
1042         NFSERR_SERVERFAULT,
1043         NFSERR_STALE,
1044         NFSERR_WRONGSEC,
1045         NFSERR_XDEV,
1046         0,
1047 };
1048
1049 static short nfsv4err_renew[] = {
1050         NFSERR_SERVERFAULT,
1051         NFSERR_ACCES,
1052         NFSERR_ADMINREVOKED,
1053         NFSERR_BADXDR,
1054         NFSERR_CBPATHDOWN,
1055         NFSERR_EXPIRED,
1056         NFSERR_LEASEMOVED,
1057         NFSERR_RESOURCE,
1058         NFSERR_SERVERFAULT,
1059         NFSERR_STALECLIENTID,
1060         0,
1061 };
1062
1063 static short nfsv4err_restorefh[] = {
1064         NFSERR_SERVERFAULT,
1065         NFSERR_BADHANDLE,
1066         NFSERR_FHEXPIRED,
1067         NFSERR_MOVED,
1068         NFSERR_RESOURCE,
1069         NFSERR_RESTOREFH,
1070         NFSERR_SERVERFAULT,
1071         NFSERR_STALE,
1072         NFSERR_WRONGSEC,
1073         0,
1074 };
1075
1076 static short nfsv4err_savefh[] = {
1077         NFSERR_SERVERFAULT,
1078         NFSERR_BADHANDLE,
1079         NFSERR_FHEXPIRED,
1080         NFSERR_MOVED,
1081         NFSERR_NOFILEHANDLE,
1082         NFSERR_RESOURCE,
1083         NFSERR_SERVERFAULT,
1084         NFSERR_STALE,
1085         0,
1086 };
1087
1088 static short nfsv4err_secinfo[] = {
1089         NFSERR_SERVERFAULT,
1090         NFSERR_ACCES,
1091         NFSERR_BADCHAR,
1092         NFSERR_BADHANDLE,
1093         NFSERR_BADNAME,
1094         NFSERR_BADXDR,
1095         NFSERR_FHEXPIRED,
1096         NFSERR_INVAL,
1097         NFSERR_MOVED,
1098         NFSERR_NAMETOL,
1099         NFSERR_NOENT,
1100         NFSERR_NOFILEHANDLE,
1101         NFSERR_NOTDIR,
1102         NFSERR_RESOURCE,
1103         NFSERR_SERVERFAULT,
1104         NFSERR_STALE,
1105         0,
1106 };
1107
1108 static short nfsv4err_setattr[] = {
1109         NFSERR_IO,
1110         NFSERR_ACCES,
1111         NFSERR_ADMINREVOKED,
1112         NFSERR_ATTRNOTSUPP,
1113         NFSERR_BADCHAR,
1114         NFSERR_BADHANDLE,
1115         NFSERR_BADOWNER,
1116         NFSERR_BADSTATEID,
1117         NFSERR_BADXDR,
1118         NFSERR_DELAY,
1119         NFSERR_DQUOT,
1120         NFSERR_EXPIRED,
1121         NFSERR_FBIG,
1122         NFSERR_FHEXPIRED,
1123         NFSERR_GRACE,
1124         NFSERR_INVAL,
1125         NFSERR_IO,
1126         NFSERR_ISDIR,
1127         NFSERR_LOCKED,
1128         NFSERR_MOVED,
1129         NFSERR_NOFILEHANDLE,
1130         NFSERR_NOSPC,
1131         NFSERR_OLDSTATEID,
1132         NFSERR_OPENMODE,
1133         NFSERR_PERM,
1134         NFSERR_RESOURCE,
1135         NFSERR_ROFS,
1136         NFSERR_SERVERFAULT,
1137         NFSERR_STALE,
1138         NFSERR_STALESTATEID,
1139         0,
1140 };
1141
1142 static short nfsv4err_setclientid[] = {
1143         NFSERR_SERVERFAULT,
1144         NFSERR_BADXDR,
1145         NFSERR_CLIDINUSE,
1146         NFSERR_INVAL,
1147         NFSERR_RESOURCE,
1148         NFSERR_SERVERFAULT,
1149         NFSERR_WRONGSEC,
1150         0,
1151 };
1152
1153 static short nfsv4err_setclientidconfirm[] = {
1154         NFSERR_SERVERFAULT,
1155         NFSERR_BADXDR,
1156         NFSERR_CLIDINUSE,
1157         NFSERR_RESOURCE,
1158         NFSERR_SERVERFAULT,
1159         NFSERR_STALECLIENTID,
1160         0,
1161 };
1162
1163 static short nfsv4err_verify[] = {
1164         NFSERR_SERVERFAULT,
1165         NFSERR_ACCES,
1166         NFSERR_ATTRNOTSUPP,
1167         NFSERR_BADCHAR,
1168         NFSERR_BADHANDLE,
1169         NFSERR_BADXDR,
1170         NFSERR_DELAY,
1171         NFSERR_FHEXPIRED,
1172         NFSERR_INVAL,
1173         NFSERR_MOVED,
1174         NFSERR_NOFILEHANDLE,
1175         NFSERR_NOTSAME,
1176         NFSERR_RESOURCE,
1177         NFSERR_SERVERFAULT,
1178         NFSERR_STALE,
1179         0,
1180 };
1181
1182 static short nfsv4err_write[] = {
1183         NFSERR_IO,
1184         NFSERR_ACCES,
1185         NFSERR_ADMINREVOKED,
1186         NFSERR_BADHANDLE,
1187         NFSERR_BADSTATEID,
1188         NFSERR_BADXDR,
1189         NFSERR_DELAY,
1190         NFSERR_DQUOT,
1191         NFSERR_EXPIRED,
1192         NFSERR_FBIG,
1193         NFSERR_FHEXPIRED,
1194         NFSERR_GRACE,
1195         NFSERR_INVAL,
1196         NFSERR_IO,
1197         NFSERR_ISDIR,
1198         NFSERR_LEASEMOVED,
1199         NFSERR_LOCKED,
1200         NFSERR_MOVED,
1201         NFSERR_NOFILEHANDLE,
1202         NFSERR_NOSPC,
1203         NFSERR_NXIO,
1204         NFSERR_OLDSTATEID,
1205         NFSERR_OPENMODE,
1206         NFSERR_RESOURCE,
1207         NFSERR_ROFS,
1208         NFSERR_SERVERFAULT,
1209         NFSERR_STALE,
1210         NFSERR_STALESTATEID,
1211         0,
1212 };
1213
1214 static short nfsv4err_releaselockowner[] = {
1215         NFSERR_SERVERFAULT,
1216         NFSERR_ADMINREVOKED,
1217         NFSERR_BADXDR,
1218         NFSERR_EXPIRED,
1219         NFSERR_LEASEMOVED,
1220         NFSERR_LOCKSHELD,
1221         NFSERR_RESOURCE,
1222         NFSERR_SERVERFAULT,
1223         NFSERR_STALECLIENTID,
1224         0,
1225 };
1226
1227 static short *nfsrv_v4errmap[] = {
1228         nfsv4err_null,
1229         nfsv4err_null,
1230         nfsv4err_null,
1231         nfsv4err_access,
1232         nfsv4err_close,
1233         nfsv4err_commit,
1234         nfsv4err_create,
1235         nfsv4err_delegpurge,
1236         nfsv4err_delegreturn,
1237         nfsv4err_getattr,
1238         nfsv4err_getfh,
1239         nfsv4err_link,
1240         nfsv4err_lock,
1241         nfsv4err_lockt,
1242         nfsv4err_locku,
1243         nfsv4err_lookup,
1244         nfsv4err_lookupp,
1245         nfsv4err_nverify,
1246         nfsv4err_open,
1247         nfsv4err_openattr,
1248         nfsv4err_openconfirm,
1249         nfsv4err_opendowngrade,
1250         nfsv4err_putfh,
1251         nfsv4err_putpubfh,
1252         nfsv4err_putrootfh,
1253         nfsv4err_read,
1254         nfsv4err_readdir,
1255         nfsv4err_readlink,
1256         nfsv4err_remove,
1257         nfsv4err_rename,
1258         nfsv4err_renew,
1259         nfsv4err_restorefh,
1260         nfsv4err_savefh,
1261         nfsv4err_secinfo,
1262         nfsv4err_setattr,
1263         nfsv4err_setclientid,
1264         nfsv4err_setclientidconfirm,
1265         nfsv4err_verify,
1266         nfsv4err_write,
1267         nfsv4err_releaselockowner,
1268 };
1269
1270 /*
1271  * A fiddled version of m_adj() that ensures null fill to a long
1272  * boundary and only trims off the back end
1273  */
1274 void
1275 nfsrv_adj(struct mbuf *mp, int len, int nul)
1276 {
1277         struct mbuf *m;
1278         int count, i;
1279         char *cp;
1280
1281         /*
1282          * Trim from tail.  Scan the mbuf chain,
1283          * calculating its length and finding the last mbuf.
1284          * If the adjustment only affects this mbuf, then just
1285          * adjust and return.  Otherwise, rescan and truncate
1286          * after the remaining size.
1287          */
1288         count = 0;
1289         m = mp;
1290         for (;;) {
1291                 count += m->m_len;
1292                 if (m->m_next == NULL)
1293                         break;
1294                 m = m->m_next;
1295         }
1296         if (m->m_len > len) {
1297                 m->m_len -= len;
1298                 if (nul > 0) {
1299                         cp = mtod(m, caddr_t) + m->m_len - nul;
1300                         for (i = 0; i < nul; i++)
1301                                 *cp++ = '\0';
1302                 }
1303                 return;
1304         }
1305         count -= len;
1306         if (count < 0)
1307                 count = 0;
1308         /*
1309          * Correct length for chain is "count".
1310          * Find the mbuf with last data, adjust its length,
1311          * and toss data from remaining mbufs on chain.
1312          */
1313         for (m = mp; m; m = m->m_next) {
1314                 if (m->m_len >= count) {
1315                         m->m_len = count;
1316                         if (nul > 0) {
1317                                 cp = mtod(m, caddr_t) + m->m_len - nul;
1318                                 for (i = 0; i < nul; i++)
1319                                         *cp++ = '\0';
1320                         }
1321                         break;
1322                 }
1323                 count -= m->m_len;
1324         }
1325         for (m = m->m_next; m; m = m->m_next)
1326                 m->m_len = 0;
1327 }
1328
1329 /*
1330  * Make these functions instead of macros, so that the kernel text size
1331  * doesn't get too big...
1332  */
1333 void
1334 nfsrv_wcc(struct nfsrv_descript *nd, int before_ret,
1335     struct nfsvattr *before_nvap, int after_ret, struct nfsvattr *after_nvap)
1336 {
1337         u_int32_t *tl;
1338
1339         if (before_ret) {
1340                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
1341                 *tl = newnfs_false;
1342         } else {
1343                 NFSM_BUILD(tl, u_int32_t *, 7 * NFSX_UNSIGNED);
1344                 *tl++ = newnfs_true;
1345                 txdr_hyper(before_nvap->na_size, tl);
1346                 tl += 2;
1347                 txdr_nfsv3time(&(before_nvap->na_mtime), tl);
1348                 tl += 2;
1349                 txdr_nfsv3time(&(before_nvap->na_ctime), tl);
1350         }
1351         nfsrv_postopattr(nd, after_ret, after_nvap);
1352 }
1353
1354 void
1355 nfsrv_postopattr(struct nfsrv_descript *nd, int after_ret,
1356     struct nfsvattr *after_nvap)
1357 {
1358         u_int32_t *tl;
1359
1360         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
1361         if (after_ret)
1362                 *tl = newnfs_false;
1363         else {
1364                 *tl = newnfs_true;
1365                 nfsrv_fillattr(nd, after_nvap);
1366         }
1367 }
1368
1369 /*
1370  * Fill in file attributes for V2 and 3. For V4, call a separate
1371  * routine that sifts through all the attribute bits.
1372  */
1373 void
1374 nfsrv_fillattr(struct nfsrv_descript *nd, struct nfsvattr *nvap)
1375 {
1376         struct nfs_fattr *fp;
1377         int fattr_size;
1378
1379         /*
1380          * Build space for the attribute structure.
1381          */
1382         if (nd->nd_flag & ND_NFSV3)
1383                 fattr_size = NFSX_V3FATTR;
1384         else
1385                 fattr_size = NFSX_V2FATTR;
1386         NFSM_BUILD(fp, struct nfs_fattr *, fattr_size);
1387
1388         /*
1389          * Now just fill it all in.
1390          */
1391         fp->fa_nlink = txdr_unsigned(nvap->na_nlink);
1392         fp->fa_uid = txdr_unsigned(nvap->na_uid);
1393         fp->fa_gid = txdr_unsigned(nvap->na_gid);
1394         if (nd->nd_flag & ND_NFSV3) {
1395                 fp->fa_type = vtonfsv34_type(nvap->na_type);
1396                 fp->fa_mode = vtonfsv34_mode(nvap->na_mode);
1397                 txdr_hyper(nvap->na_size, &fp->fa3_size);
1398                 txdr_hyper(nvap->na_bytes, &fp->fa3_used);
1399                 fp->fa3_rdev.specdata1 = txdr_unsigned(NFSMAJOR(nvap->na_rdev));
1400                 fp->fa3_rdev.specdata2 = txdr_unsigned(NFSMINOR(nvap->na_rdev));
1401                 fp->fa3_fsid.nfsuquad[0] = 0;
1402                 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(nvap->na_fsid);
1403                 txdr_hyper(nvap->na_fileid, &fp->fa3_fileid);
1404                 txdr_nfsv3time(&nvap->na_atime, &fp->fa3_atime);
1405                 txdr_nfsv3time(&nvap->na_mtime, &fp->fa3_mtime);
1406                 txdr_nfsv3time(&nvap->na_ctime, &fp->fa3_ctime);
1407         } else {
1408                 fp->fa_type = vtonfsv2_type(nvap->na_type);
1409                 fp->fa_mode = vtonfsv2_mode(nvap->na_type, nvap->na_mode);
1410                 fp->fa2_size = txdr_unsigned(nvap->na_size);
1411                 fp->fa2_blocksize = txdr_unsigned(nvap->na_blocksize);
1412                 if (nvap->na_type == VFIFO)
1413                         fp->fa2_rdev = 0xffffffff;
1414                 else
1415                         fp->fa2_rdev = txdr_unsigned(nvap->na_rdev);
1416                 fp->fa2_blocks = txdr_unsigned(nvap->na_bytes / NFS_FABLKSIZE);
1417                 fp->fa2_fsid = txdr_unsigned(nvap->na_fsid);
1418                 fp->fa2_fileid = txdr_unsigned(nvap->na_fileid);
1419                 txdr_nfsv2time(&nvap->na_atime, &fp->fa2_atime);
1420                 txdr_nfsv2time(&nvap->na_mtime, &fp->fa2_mtime);
1421                 txdr_nfsv2time(&nvap->na_ctime, &fp->fa2_ctime);
1422         }
1423 }
1424
1425 /*
1426  * This function gets a file handle out of an mbuf list.
1427  * It returns 0 for success, EBADRPC otherwise.
1428  * If sets the third flagp argument to 1 if the file handle is
1429  * the public file handle.
1430  * For NFSv4, if the length is incorrect, set nd_repstat == NFSERR_BADHANDLE
1431  */
1432 int
1433 nfsrv_mtofh(struct nfsrv_descript *nd, struct nfsrvfh *fhp)
1434 {
1435         u_int32_t *tl;
1436         int error = 0, len, copylen;
1437
1438         if (nd->nd_flag & (ND_NFSV3 | ND_NFSV4)) {
1439                 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
1440                 len = fxdr_unsigned(int, *tl);
1441                 if (len == 0 && nfs_pubfhset && (nd->nd_flag & ND_NFSV3) &&
1442                     nd->nd_procnum == NFSPROC_LOOKUP) {
1443                         nd->nd_flag |= ND_PUBLOOKUP;
1444                         goto nfsmout;
1445                 }
1446                 copylen = len;
1447
1448                 /* If len == NFSX_V4PNFSFH the RPC is a pNFS DS one. */
1449                 if (len == NFSX_V4PNFSFH && (nd->nd_flag & ND_NFSV41) != 0) {
1450                         copylen = NFSX_MYFH;
1451                         len = NFSM_RNDUP(len);
1452                         nd->nd_flag |= ND_DSSERVER;
1453                 } else if (len < NFSRV_MINFH || len > NFSRV_MAXFH) {
1454                         if (nd->nd_flag & ND_NFSV4) {
1455                             if (len > 0 && len <= NFSX_V4FHMAX) {
1456                                 error = nfsm_advance(nd, NFSM_RNDUP(len), -1);
1457                                 if (error)
1458                                         goto nfsmout;
1459                                 nd->nd_repstat = NFSERR_BADHANDLE;
1460                                 goto nfsmout;
1461                             } else {
1462                                     error = EBADRPC;
1463                                     goto nfsmout;
1464                             }
1465                         } else {
1466                                 error = EBADRPC;
1467                                 goto nfsmout;
1468                         }
1469                 }
1470         } else {
1471                 /*
1472                  * For NFSv2, the file handle is always 32 bytes on the
1473                  * wire, but this server only cares about the first
1474                  * NFSRV_MAXFH bytes.
1475                  */
1476                 len = NFSX_V2FH;
1477                 copylen = NFSRV_MAXFH;
1478         }
1479         NFSM_DISSECT(tl, u_int32_t *, len);
1480         if ((nd->nd_flag & ND_NFSV2) && nfs_pubfhset &&
1481             nd->nd_procnum == NFSPROC_LOOKUP &&
1482             !NFSBCMP((caddr_t)tl, nfs_v2pubfh, NFSX_V2FH)) {
1483                 nd->nd_flag |= ND_PUBLOOKUP;
1484                 goto nfsmout;
1485         }
1486         NFSBCOPY(tl, (caddr_t)fhp->nfsrvfh_data, copylen);
1487         fhp->nfsrvfh_len = copylen;
1488 nfsmout:
1489         NFSEXITCODE2(error, nd);
1490         return (error);
1491 }
1492
1493 /*
1494  * Map errnos to NFS error numbers. For Version 3 and 4 also filter out error
1495  * numbers not specified for the associated procedure.
1496  * NFSPROC_NOOP is a special case, where the high order bits of nd_repstat
1497  * should be cleared. NFSPROC_NOOP is used to return errors when a valid
1498  * RPC procedure is not involved.
1499  * Returns the error number in XDR.
1500  */
1501 int
1502 nfsd_errmap(struct nfsrv_descript *nd)
1503 {
1504         short *defaulterrp, *errp;
1505
1506         if (!nd->nd_repstat)
1507                 return (0);
1508         if (nd->nd_flag & (ND_NFSV3 | ND_NFSV4)) {
1509                 if (nd->nd_procnum == NFSPROC_NOOP)
1510                         return (txdr_unsigned(nd->nd_repstat & 0xffff));
1511                 if (nd->nd_flag & ND_NFSV3)
1512                     errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum];
1513                 else if (nd->nd_repstat == EBADRPC)
1514                         return (txdr_unsigned(NFSERR_BADXDR));
1515                 else if (nd->nd_repstat == NFSERR_MINORVERMISMATCH ||
1516                          nd->nd_repstat == NFSERR_OPILLEGAL)
1517                         return (txdr_unsigned(nd->nd_repstat));
1518                 else if ((nd->nd_flag & ND_NFSV41) != 0) {
1519                         if (nd->nd_repstat == EOPNOTSUPP)
1520                                 nd->nd_repstat = NFSERR_NOTSUPP;
1521                         nd->nd_repstat = nfsrv_isannfserr(nd->nd_repstat);
1522                         return (txdr_unsigned(nd->nd_repstat));
1523                 } else
1524                     errp = defaulterrp = nfsrv_v4errmap[nd->nd_procnum];
1525                 while (*++errp)
1526                         if (*errp == nd->nd_repstat)
1527                                 return (txdr_unsigned(nd->nd_repstat));
1528                 return (txdr_unsigned(*defaulterrp));
1529         }
1530         if (nd->nd_repstat <= NFSERR_REMOTE)
1531                 return (txdr_unsigned(nfsrv_v2errmap[nd->nd_repstat - 1]));
1532         return (txdr_unsigned(NFSERR_IO));
1533 }
1534
1535 /*
1536  * Check to see if the error is a valid NFS one. If not, replace it with
1537  * NFSERR_IO.
1538  */
1539 static u_int32_t
1540 nfsrv_isannfserr(u_int32_t errval)
1541 {
1542
1543         if (errval == NFSERR_OK)
1544                 return (errval);
1545         if (errval >= NFSERR_BADHANDLE && errval <= NFSERR_MAXERRVAL)
1546                 return (errval);
1547         if (errval > 0 && errval <= NFSERR_REMOTE)
1548                 return (nfsrv_v2errmap[errval - 1]);
1549         return (NFSERR_IO);
1550 }
1551
1552 /*
1553  * Check to see if setting a uid/gid is permitted when creating a new
1554  * file object. (Called when uid and/or gid is specified in the
1555  * settable attributes for V4.
1556  */
1557 int
1558 nfsrv_checkuidgid(struct nfsrv_descript *nd, struct nfsvattr *nvap)
1559 {
1560         int error = 0;
1561
1562         /*
1563          * If not setting either uid nor gid, it's OK.
1564          */
1565         if (NFSVNO_NOTSETUID(nvap) && NFSVNO_NOTSETGID(nvap))
1566                 goto out;
1567         if ((NFSVNO_ISSETUID(nvap) && nvap->na_uid == nfsrv_defaultuid &&
1568            enable_nobodycheck == 1)
1569             || (NFSVNO_ISSETGID(nvap) && nvap->na_gid == nfsrv_defaultgid &&
1570            enable_nogroupcheck == 1)) {
1571                 error = NFSERR_BADOWNER;
1572                 goto out;
1573         }
1574         if (nd->nd_cred->cr_uid == 0)
1575                 goto out;
1576         if ((NFSVNO_ISSETUID(nvap) && nvap->na_uid != nd->nd_cred->cr_uid) ||
1577             (NFSVNO_ISSETGID(nvap) && nvap->na_gid != nd->nd_cred->cr_gid &&
1578             !groupmember(nvap->na_gid, nd->nd_cred)))
1579                 error = NFSERR_PERM;
1580
1581 out:
1582         NFSEXITCODE2(error, nd);
1583         return (error);
1584 }
1585
1586 /*
1587  * and this routine fixes up the settable attributes for V4 if allowed
1588  * by nfsrv_checkuidgid().
1589  */
1590 void
1591 nfsrv_fixattr(struct nfsrv_descript *nd, vnode_t vp,
1592     struct nfsvattr *nvap, NFSACL_T *aclp, NFSPROC_T *p, nfsattrbit_t *attrbitp,
1593     struct nfsexstuff *exp)
1594 {
1595         int change = 0;
1596         struct nfsvattr nva;
1597         uid_t tuid;
1598         int error;
1599         nfsattrbit_t nattrbits;
1600
1601         /*
1602          * Maybe this should be done for V2 and 3 but it never has been
1603          * and nobody seems to be upset, so I think it's best not to change
1604          * the V2 and 3 semantics.
1605          */
1606         if ((nd->nd_flag & ND_NFSV4) == 0)
1607                 goto out;
1608         NFSVNO_ATTRINIT(&nva);
1609         NFSZERO_ATTRBIT(&nattrbits);
1610         tuid = nd->nd_cred->cr_uid;
1611         if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNER) &&
1612             NFSVNO_ISSETUID(nvap) &&
1613             nvap->na_uid != nd->nd_cred->cr_uid) {
1614                 if (nd->nd_cred->cr_uid == 0) {
1615                         nva.na_uid = nvap->na_uid;
1616                         change++;
1617                         NFSSETBIT_ATTRBIT(&nattrbits, NFSATTRBIT_OWNER);
1618                 } else {
1619                         NFSCLRBIT_ATTRBIT(attrbitp, NFSATTRBIT_OWNER);
1620                 }
1621         }
1622         if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_TIMEACCESSSET) &&
1623             NFSVNO_ISSETATIME(nvap)) {
1624                 nva.na_atime = nvap->na_atime;
1625                 change++;
1626                 NFSSETBIT_ATTRBIT(&nattrbits, NFSATTRBIT_TIMEACCESSSET);
1627         }
1628         if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_TIMEMODIFYSET) &&
1629             NFSVNO_ISSETMTIME(nvap)) {
1630                 nva.na_mtime = nvap->na_mtime;
1631                 change++;
1632                 NFSSETBIT_ATTRBIT(&nattrbits, NFSATTRBIT_TIMEMODIFYSET);
1633         }
1634         if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNERGROUP) &&
1635             NFSVNO_ISSETGID(nvap)) {
1636                 if (nvap->na_gid == nd->nd_cred->cr_gid ||
1637                     groupmember(nvap->na_gid, nd->nd_cred)) {
1638                         nd->nd_cred->cr_uid = 0;
1639                         nva.na_gid = nvap->na_gid;
1640                         change++;
1641                         NFSSETBIT_ATTRBIT(&nattrbits, NFSATTRBIT_OWNERGROUP);
1642                 } else {
1643                         NFSCLRBIT_ATTRBIT(attrbitp, NFSATTRBIT_OWNERGROUP);
1644                 }
1645         }
1646         if (change) {
1647                 error = nfsvno_setattr(vp, &nva, nd->nd_cred, p, exp);
1648                 if (error) {
1649                         NFSCLRALL_ATTRBIT(attrbitp, &nattrbits);
1650                 }
1651         }
1652         if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SIZE) &&
1653             NFSVNO_ISSETSIZE(nvap) && nvap->na_size != (u_quad_t)0) {
1654                 NFSCLRBIT_ATTRBIT(attrbitp, NFSATTRBIT_SIZE);
1655         }
1656 #ifdef NFS4_ACL_EXTATTR_NAME
1657         if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_ACL) &&
1658             nfsrv_useacl != 0 && aclp != NULL) {
1659                 if (aclp->acl_cnt > 0) {
1660                         error = nfsrv_setacl(vp, aclp, nd->nd_cred, p);
1661                         if (error) {
1662                                 NFSCLRBIT_ATTRBIT(attrbitp, NFSATTRBIT_ACL);
1663                         }
1664                 }
1665         } else
1666 #endif
1667         NFSCLRBIT_ATTRBIT(attrbitp, NFSATTRBIT_ACL);
1668         nd->nd_cred->cr_uid = tuid;
1669
1670 out:
1671         NFSEXITCODE2(0, nd);
1672 }
1673
1674 /*
1675  * Translate an ASCII hex digit to it's binary value. Return -1 if the
1676  * char isn't a hex digit.
1677  */
1678 static char
1679 nfsrv_hexdigit(char c, int *err)
1680 {
1681
1682         *err = 0;
1683         if (c >= '0' && c <= '9')
1684                 return (c - '0');
1685         if (c >= 'a' && c <= 'f')
1686                 return (c - 'a' + ((char)10));
1687         if (c >= 'A' && c <= 'F')
1688                 return (c - 'A' + ((char)10));
1689         /* Not valid ! */
1690         *err = 1;
1691         return (1);     /* BOGUS */
1692 }
1693
1694 /*
1695  * Check to see if NFSERR_MOVED can be returned for this op. Return 1 iff
1696  * it can be.
1697  */
1698 int
1699 nfsrv_errmoved(int op)
1700 {
1701         short *errp;
1702
1703         errp = nfsrv_v4errmap[op];
1704         while (*errp != 0) {
1705                 if (*errp == NFSERR_MOVED)
1706                         return (1);
1707                 errp++;
1708         }
1709         return (0);
1710 }
1711
1712 /*
1713  * Fill in attributes for a Referral.
1714  * (Return the number of bytes of XDR created.)
1715  */
1716 int
1717 nfsrv_putreferralattr(struct nfsrv_descript *nd, nfsattrbit_t *retbitp,
1718     struct nfsreferral *refp, int getattr, int *reterrp)
1719 {
1720         u_int32_t *tl, *retnump;
1721         u_char *cp, *cp2;
1722         int prefixnum, retnum = 0, i, len, bitpos, rderrbit = 0, nonrefbit = 0;
1723         int fslocationsbit = 0;
1724         nfsattrbit_t tmpbits, refbits;
1725
1726         NFSREFERRAL_ATTRBIT(&refbits);
1727         if (getattr)
1728                 NFSCLRBIT_ATTRBIT(&refbits, NFSATTRBIT_RDATTRERROR);
1729         else if (NFSISSET_ATTRBIT(retbitp, NFSATTRBIT_RDATTRERROR))
1730                 rderrbit = 1;
1731         if (NFSISSET_ATTRBIT(retbitp, NFSATTRBIT_FSLOCATIONS))
1732                 fslocationsbit = 1;
1733
1734         /*
1735          * Check for the case where unsupported referral attributes are
1736          * requested.
1737          */
1738         NFSSET_ATTRBIT(&tmpbits, retbitp);
1739         NFSCLRALL_ATTRBIT(&tmpbits, &refbits);
1740         if (NFSNONZERO_ATTRBIT(&tmpbits))
1741                 nonrefbit = 1;
1742
1743         if (nonrefbit && !fslocationsbit && (getattr || !rderrbit)) {
1744                 *reterrp = NFSERR_MOVED;
1745                 return (0);
1746         }
1747
1748         /*
1749          * Now we can fill in the attributes.
1750          */
1751         NFSSET_ATTRBIT(&tmpbits, retbitp);
1752         NFSCLRNOT_ATTRBIT(&tmpbits, &refbits);
1753
1754         /*
1755          * Put out the attribute bitmap for the ones being filled in
1756          * and get the field for the number of attributes returned.
1757          */
1758         prefixnum = nfsrv_putattrbit(nd, &tmpbits);
1759         NFSM_BUILD(retnump, u_int32_t *, NFSX_UNSIGNED);
1760         prefixnum += NFSX_UNSIGNED;
1761
1762         /*
1763          * Now, loop around filling in the attributes for each bit set.
1764          */
1765         for (bitpos = 0; bitpos < NFSATTRBIT_MAX; bitpos++) {
1766             if (NFSISSET_ATTRBIT(&tmpbits, bitpos)) {
1767                 switch (bitpos) {
1768                 case NFSATTRBIT_TYPE:
1769                         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
1770                         *tl = txdr_unsigned(NFDIR);
1771                         retnum += NFSX_UNSIGNED;
1772                         break;
1773                 case NFSATTRBIT_FSID:
1774                         NFSM_BUILD(tl, u_int32_t *, NFSX_V4FSID);
1775                         *tl++ = 0;
1776                         *tl++ = txdr_unsigned(NFSV4ROOT_FSID0);
1777                         *tl++ = 0;
1778                         *tl = txdr_unsigned(NFSV4ROOT_REFERRAL);
1779                         retnum += NFSX_V4FSID;
1780                         break;
1781                 case NFSATTRBIT_RDATTRERROR:
1782                         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
1783                         if (nonrefbit)
1784                                 *tl = txdr_unsigned(NFSERR_MOVED);
1785                         else
1786                                 *tl = 0;
1787                         retnum += NFSX_UNSIGNED;
1788                         break;
1789                 case NFSATTRBIT_FSLOCATIONS:
1790                         retnum += nfsm_strtom(nd, "/", 1);
1791                         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
1792                         *tl = txdr_unsigned(refp->nfr_srvcnt);
1793                         retnum += NFSX_UNSIGNED;
1794                         cp = refp->nfr_srvlist;
1795                         for (i = 0; i < refp->nfr_srvcnt; i++) {
1796                                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
1797                                 *tl = txdr_unsigned(1);
1798                                 retnum += NFSX_UNSIGNED;
1799                                 cp2 = STRCHR(cp, ':');
1800                                 if (cp2 != NULL)
1801                                         len = cp2 - cp;
1802                                 else
1803                                         len = 1;
1804                                 retnum += nfsm_strtom(nd, cp, len);
1805                                 if (cp2 != NULL)
1806                                         cp = cp2 + 1;
1807                                 cp2 = STRCHR(cp, ',');
1808                                 if (cp2 != NULL)
1809                                         len = cp2 - cp;
1810                                 else
1811                                         len = strlen(cp);
1812                                 retnum += nfsm_strtom(nd, cp, len);
1813                                 if (cp2 != NULL)
1814                                         cp = cp2 + 1;
1815                         }
1816                         break;
1817                 case NFSATTRBIT_MOUNTEDONFILEID:
1818                         NFSM_BUILD(tl, u_int32_t *, NFSX_HYPER);
1819                         txdr_hyper(refp->nfr_dfileno, tl);
1820                         retnum += NFSX_HYPER;
1821                         break;
1822                 default:
1823                         printf("EEK! Bad V4 refattr bitpos=%d\n", bitpos);
1824                 }
1825             }
1826         }
1827         *retnump = txdr_unsigned(retnum);
1828         return (retnum + prefixnum);
1829 }
1830
1831 /*
1832  * Parse a file name out of a request.
1833  */
1834 int
1835 nfsrv_parsename(struct nfsrv_descript *nd, char *bufp, u_long *hashp,
1836     NFSPATHLEN_T *outlenp)
1837 {
1838         char *fromcp, *tocp, val = '\0';
1839         struct mbuf *md;
1840         int i;
1841         int rem, len, error = 0, pubtype = 0, outlen = 0, percent = 0;
1842         char digit;
1843         u_int32_t *tl;
1844         u_long hash = 0;
1845
1846         if (hashp != NULL)
1847                 *hashp = 0;
1848         tocp = bufp;
1849         /*
1850          * For V4, check for lookup parent.
1851          * Otherwise, get the component name.
1852          */
1853         if ((nd->nd_flag & ND_NFSV4) && nd->nd_procnum == NFSV4OP_LOOKUPP) {
1854             *tocp++ = '.';
1855             hash += ((u_char)'.');
1856             *tocp++ = '.';
1857             hash += ((u_char)'.');
1858             outlen = 2;
1859         } else {
1860             /*
1861              * First, get the name length.
1862              */
1863             NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
1864             len = fxdr_unsigned(int, *tl);
1865             if (len > NFS_MAXNAMLEN) {
1866                 nd->nd_repstat = NFSERR_NAMETOL;
1867                 error = 0;
1868                 goto nfsmout;
1869             } else if (len <= 0) {
1870                 nd->nd_repstat = NFSERR_INVAL;
1871                 error = 0;
1872                 goto nfsmout;
1873             }
1874
1875             /*
1876              * Now, copy the component name into the buffer.
1877              */
1878             fromcp = nd->nd_dpos;
1879             md = nd->nd_md;
1880             rem = mtod(md, caddr_t) + md->m_len - fromcp;
1881             for (i = 0; i < len; i++) {
1882                 while (rem == 0) {
1883                         md = md->m_next;
1884                         if (md == NULL) {
1885                                 error = EBADRPC;
1886                                 goto nfsmout;
1887                         }
1888                         fromcp = mtod(md, caddr_t);
1889                         rem = md->m_len;
1890                 }
1891                 if (*fromcp == '\0') {
1892                         nd->nd_repstat = EACCES;
1893                         error = 0;
1894                         goto nfsmout;
1895                 }
1896                 /*
1897                  * For lookups on the public filehandle, do some special
1898                  * processing on the name. (The public file handle is the
1899                  * root of the public file system for this server.)
1900                  */
1901                 if (nd->nd_flag & ND_PUBLOOKUP) {
1902                         /*
1903                          * If the first char is ASCII, it is a canonical
1904                          * path, otherwise it is a native path. (RFC2054
1905                          * doesn't actually state what it is if the first
1906                          * char isn't ASCII or 0x80, so I assume native.)
1907                          * pubtype == 1 -> native path
1908                          * pubtype == 2 -> canonical path
1909                          */
1910                         if (i == 0) {
1911                                 if (*fromcp & 0x80) {
1912                                         /*
1913                                          * Since RFC2054 doesn't indicate
1914                                          * that a native path of just 0x80
1915                                          * isn't allowed, I'll replace the
1916                                          * 0x80 with '/' instead of just
1917                                          * throwing it away.
1918                                          */
1919                                         *fromcp = '/';
1920                                         pubtype = 1;
1921                                 } else {
1922                                         pubtype = 2;
1923                                 }
1924                         }
1925                         /*
1926                          * '/' only allowed in a native path
1927                          */
1928                         if (*fromcp == '/' && pubtype != 1) {
1929                                 nd->nd_repstat = EACCES;
1930                                 error = 0;
1931                                 goto nfsmout;
1932                         }
1933
1934                         /*
1935                          * For the special case of 2 hex digits after a
1936                          * '%' in an absolute path, calculate the value.
1937                          * percent == 1 -> indicates "get first hex digit"
1938                          * percent == 2 -> indicates "get second hex digit"
1939                          */
1940                         if (percent > 0) {
1941                                 digit = nfsrv_hexdigit(*fromcp, &error);
1942                                 if (error) {
1943                                         nd->nd_repstat = EACCES;
1944                                         error = 0;
1945                                         goto nfsmout;
1946                                 }
1947                                 if (percent == 1) {
1948                                         val = (digit << 4);
1949                                         percent = 2;
1950                                 } else {
1951                                         val += digit;
1952                                         percent = 0;
1953                                         *tocp++ = val;
1954                                         hash += ((u_char)val);
1955                                         outlen++;
1956                                 }
1957                         } else {
1958                                 if (*fromcp == '%' && pubtype == 2) {
1959                                         /*
1960                                          * Must be followed by 2 hex digits
1961                                          */
1962                                         if ((len - i) < 3) {
1963                                                 nd->nd_repstat = EACCES;
1964                                                 error = 0;
1965                                                 goto nfsmout;
1966                                         }
1967                                         percent = 1;
1968                                 } else {
1969                                         *tocp++ = *fromcp;
1970                                         hash += ((u_char)*fromcp);
1971                                         outlen++;
1972                                 }
1973                         }
1974                 } else {
1975                         /*
1976                          * Normal, non lookup on public, name.
1977                          */
1978                         if (*fromcp == '/') {
1979                                 if (nd->nd_flag & ND_NFSV4)
1980                                         nd->nd_repstat = NFSERR_BADNAME;
1981                                 else
1982                                         nd->nd_repstat = EACCES;
1983                                 error = 0;
1984                                 goto nfsmout;
1985                         }
1986                         hash += ((u_char)*fromcp);
1987                         *tocp++ = *fromcp;
1988                         outlen++;
1989                 }
1990                 fromcp++;
1991                 rem--;
1992             }
1993             nd->nd_md = md;
1994             nd->nd_dpos = fromcp;
1995             i = NFSM_RNDUP(len) - len;
1996             if (i > 0) {
1997                 if (rem >= i) {
1998                         nd->nd_dpos += i;
1999                 } else {
2000                         error = nfsm_advance(nd, i, rem);
2001                         if (error)
2002                                 goto nfsmout;
2003                 }
2004             }
2005
2006             /*
2007              * For v4, don't allow lookups of '.' or '..' and
2008              * also check for non-utf8 strings.
2009              */
2010             if (nd->nd_flag & ND_NFSV4) {
2011                 if ((outlen == 1 && bufp[0] == '.') ||
2012                     (outlen == 2 && bufp[0] == '.' &&
2013                      bufp[1] == '.')) {
2014                     nd->nd_repstat = NFSERR_BADNAME;
2015                     error = 0;
2016                     goto nfsmout;
2017                 }
2018                 if (enable_checkutf8 == 1 &&
2019                     nfsrv_checkutf8((u_int8_t *)bufp, outlen)) {
2020                     nd->nd_repstat = NFSERR_INVAL;
2021                     error = 0;
2022                     goto nfsmout;
2023                 }
2024             }
2025         }
2026         *tocp = '\0';
2027         *outlenp = (size_t)outlen;
2028         if (hashp != NULL)
2029                 *hashp = hash;
2030 nfsmout:
2031         NFSEXITCODE2(error, nd);
2032         return (error);
2033 }
2034
2035 void
2036 nfsd_init(void)
2037 {
2038         int i;
2039         static int inited = 0;
2040
2041         if (inited)
2042                 return;
2043         inited = 1;
2044
2045         /*
2046          * Initialize client queues. Don't free/reinitialize
2047          * them when nfsds are restarted.
2048          */
2049         nfsclienthash = malloc(sizeof(struct nfsclienthashhead) *
2050             nfsrv_clienthashsize, M_NFSDCLIENT, M_WAITOK | M_ZERO);
2051         for (i = 0; i < nfsrv_clienthashsize; i++)
2052                 LIST_INIT(&nfsclienthash[i]);
2053         nfslockhash = malloc(sizeof(struct nfslockhashhead) *
2054             nfsrv_lockhashsize, M_NFSDLOCKFILE, M_WAITOK | M_ZERO);
2055         for (i = 0; i < nfsrv_lockhashsize; i++)
2056                 LIST_INIT(&nfslockhash[i]);
2057         nfssessionhash = malloc(sizeof(struct nfssessionhash) *
2058             nfsrv_sessionhashsize, M_NFSDSESSION, M_WAITOK | M_ZERO);
2059         for (i = 0; i < nfsrv_sessionhashsize; i++) {
2060                 mtx_init(&nfssessionhash[i].mtx, "nfssm", NULL, MTX_DEF);
2061                 LIST_INIT(&nfssessionhash[i].list);
2062         }
2063         LIST_INIT(&nfsrv_dontlisthead);
2064         TAILQ_INIT(&nfsrv_recalllisthead);
2065
2066         /* and the v2 pubfh should be all zeros */
2067         NFSBZERO(nfs_v2pubfh, NFSX_V2FH);
2068 }
2069
2070 /*
2071  * Check the v4 root exports.
2072  * Return 0 if ok, 1 otherwise.
2073  */
2074 int
2075 nfsd_checkrootexp(struct nfsrv_descript *nd)
2076 {
2077
2078         if ((nd->nd_flag & (ND_GSS | ND_EXAUTHSYS)) == ND_EXAUTHSYS)
2079                 return (0);
2080         if ((nd->nd_flag & (ND_GSSINTEGRITY | ND_EXGSSINTEGRITY)) ==
2081             (ND_GSSINTEGRITY | ND_EXGSSINTEGRITY))
2082                 return (0);
2083         if ((nd->nd_flag & (ND_GSSPRIVACY | ND_EXGSSPRIVACY)) ==
2084             (ND_GSSPRIVACY | ND_EXGSSPRIVACY))
2085                 return (0);
2086         if ((nd->nd_flag & (ND_GSS | ND_GSSINTEGRITY | ND_GSSPRIVACY |
2087              ND_EXGSS)) == (ND_GSS | ND_EXGSS))
2088                 return (0);
2089         return (1);
2090 }
2091
2092 /*
2093  * Parse the first part of an NFSv4 compound to find out what the minor
2094  * version# is.
2095  */
2096 void
2097 nfsd_getminorvers(struct nfsrv_descript *nd, u_char *tag, u_char **tagstrp,
2098     int *taglenp, u_int32_t *minversp)
2099 {
2100         uint32_t *tl;
2101         int error = 0, taglen = -1;
2102         u_char *tagstr = NULL;
2103
2104         NFSM_DISSECT(tl, uint32_t *, NFSX_UNSIGNED);
2105         taglen = fxdr_unsigned(int, *tl);
2106         if (taglen < 0 || taglen > NFSV4_OPAQUELIMIT) {
2107                 error = EBADRPC;
2108                 goto nfsmout;
2109         }
2110         if (taglen <= NFSV4_SMALLSTR)
2111                 tagstr = tag;
2112         else
2113                 tagstr = malloc(taglen + 1, M_TEMP, M_WAITOK);
2114         error = nfsrv_mtostr(nd, tagstr, taglen);
2115         if (error != 0)
2116                 goto nfsmout;
2117         NFSM_DISSECT(tl, uint32_t *, NFSX_UNSIGNED);
2118         *minversp = fxdr_unsigned(u_int32_t, *tl);
2119         *tagstrp = tagstr;
2120         if (*minversp == NFSV41_MINORVERSION)
2121                 nd->nd_flag |= ND_NFSV41;
2122         else if (*minversp == NFSV42_MINORVERSION)
2123                 nd->nd_flag |= (ND_NFSV41 | ND_NFSV42);
2124 nfsmout:
2125         if (error != 0) {
2126                 if (tagstr != NULL && taglen > NFSV4_SMALLSTR)
2127                         free(tagstr, M_TEMP);
2128                 taglen = -1;
2129         }
2130         *taglenp = taglen;
2131 }
2132