sys/fs/nfsserver/nfs_nfsdsubs.c

   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("$FreeBSD$");
  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;
  48 extern int nfsrv_clienthashsize;
  49 extern struct nfslockhashhead *nfslockhash;
  50 extern int nfsrv_lockhashsize;
  51 extern struct nfssessionhash *nfssessionhash;
  52 extern int nfsrv_sessionhashsize;
  53 extern int nfsrv_useacl;
  54 extern uid_t nfsrv_defaultuid;
  55 extern gid_t nfsrv_defaultgid;
  56
  57 char nfs_v2pubfh[NFSX_V2FH];
  58 static nfstype newnfsv2_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK,
  59     NFNON, NFCHR, NFNON };
  60 extern nfstype nfsv34_type[9];
  61 #endif  /* !APPLEKEXT */
  62
  63 static u_int32_t nfsrv_isannfserr(u_int32_t);
  64
  65 SYSCTL_DECL(_vfs_nfsd);
  66
  67 static int      disable_checkutf8 = 0;
  68 SYSCTL_INT(_vfs_nfsd, OID_AUTO, disable_checkutf8, CTLFLAG_RW,
  69     &disable_checkutf8, 0,
  70     "Disable the NFSv4 check for a UTF8 compliant name");
  71
  72 static int    enable_nobodycheck = 1;
  73 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_nobodycheck, CTLFLAG_RW,
  74     &enable_nobodycheck, 0,
  75     "Enable the NFSv4 check when setting user nobody as owner");
  76
  77 static int    enable_nogroupcheck = 1;
  78 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_nogroupcheck, CTLFLAG_RW,
  79     &enable_nogroupcheck, 0,
  80     "Enable the NFSv4 check when setting group nogroup as owner");
  81
  82 static char nfsrv_hexdigit(char, int *);
  83
  84 /*
  85  * Maps errno values to nfs error numbers.
  86  * Use NFSERR_IO as the catch all for ones not specifically defined in
  87  * RFC 1094. (It now includes the errors added for NFSv3.)
  88  */
  89 static u_char nfsrv_v2errmap[NFSERR_REMOTE] = {
  90   NFSERR_PERM,  NFSERR_NOENT,   NFSERR_IO,      NFSERR_IO,      NFSERR_IO,
  91   NFSERR_NXIO,  NFSERR_IO,      NFSERR_IO,      NFSERR_IO,      NFSERR_IO,
  92   NFSERR_IO,    NFSERR_IO,      NFSERR_ACCES,   NFSERR_IO,      NFSERR_IO,
  93   NFSERR_IO,    NFSERR_EXIST,   NFSERR_XDEV,    NFSERR_NODEV,   NFSERR_NOTDIR,
  94   NFSERR_ISDIR, NFSERR_INVAL,   NFSERR_IO,      NFSERR_IO,      NFSERR_IO,
  95   NFSERR_IO,    NFSERR_FBIG,    NFSERR_NOSPC,   NFSERR_IO,      NFSERR_ROFS,
  96   NFSERR_MLINK, NFSERR_IO,      NFSERR_IO,      NFSERR_IO,      NFSERR_IO,
  97   NFSERR_IO,    NFSERR_IO,      NFSERR_IO,      NFSERR_IO,      NFSERR_IO,
  98   NFSERR_IO,    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_NAMETOL, NFSERR_IO,      NFSERR_IO,
 103   NFSERR_NOTEMPTY, NFSERR_IO,   NFSERR_IO,      NFSERR_DQUOT,   NFSERR_STALE,
 104   NFSERR_REMOTE,
 105 };
 106
 107 /*
 108  * Maps errno values to nfs error numbers.
 109  * Although it is not obvious whether or not NFS clients really care if
 110  * a returned error value is in the specified list for the procedure, the
 111  * safest thing to do is filter them appropriately. For Version 2, the
 112  * X/Open XNFS document is the only specification that defines error values
 113  * for each RPC (The RFC simply lists all possible error values for all RPCs),
 114  * so I have decided to not do this for Version 2.
 115  * The first entry is the default error return and the rest are the valid
 116  * errors for that RPC in increasing numeric order.
 117  */
 118 static short nfsv3err_null[] = {
 119         0,
 120         0,
 121 };
 122
 123 static short nfsv3err_getattr[] = {
 124         NFSERR_IO,
 125         NFSERR_IO,
 126         NFSERR_STALE,
 127         NFSERR_BADHANDLE,
 128         NFSERR_SERVERFAULT,
 129         NFSERR_DELAY,
 130         0,
 131 };
 132
 133 static short nfsv3err_setattr[] = {
 134         NFSERR_IO,
 135         NFSERR_ACCES,
 136         NFSERR_PERM,
 137         NFSERR_IO,
 138         NFSERR_INVAL,
 139         NFSERR_NOSPC,
 140         NFSERR_ROFS,
 141         NFSERR_DQUOT,
 142         NFSERR_STALE,
 143         NFSERR_BADHANDLE,
 144         NFSERR_NOT_SYNC,
 145         NFSERR_SERVERFAULT,
 146         NFSERR_DELAY,
 147         0,
 148 };
 149
 150 static short nfsv3err_lookup[] = {
 151         NFSERR_IO,
 152         NFSERR_NOENT,
 153         NFSERR_ACCES,
 154         NFSERR_NAMETOL,
 155         NFSERR_IO,
 156         NFSERR_NOTDIR,
 157         NFSERR_STALE,
 158         NFSERR_BADHANDLE,
 159         NFSERR_SERVERFAULT,
 160         NFSERR_DELAY,
 161         0,
 162 };
 163
 164 static short nfsv3err_access[] = {
 165         NFSERR_IO,
 166         NFSERR_IO,
 167         NFSERR_STALE,
 168         NFSERR_BADHANDLE,
 169         NFSERR_SERVERFAULT,
 170         NFSERR_DELAY,
 171         0,
 172 };
 173
 174 static short nfsv3err_readlink[] = {
 175         NFSERR_IO,
 176         NFSERR_IO,
 177         NFSERR_ACCES,
 178         NFSERR_INVAL,
 179         NFSERR_STALE,
 180         NFSERR_BADHANDLE,
 181         NFSERR_NOTSUPP,
 182         NFSERR_SERVERFAULT,
 183         NFSERR_DELAY,
 184         0,
 185 };
 186
 187 static short nfsv3err_read[] = {
 188         NFSERR_IO,
 189         NFSERR_IO,
 190         NFSERR_NXIO,
 191         NFSERR_ACCES,
 192         NFSERR_INVAL,
 193         NFSERR_STALE,
 194         NFSERR_BADHANDLE,
 195         NFSERR_SERVERFAULT,
 196         NFSERR_DELAY,
 197         0,
 198 };
 199
 200 static short nfsv3err_write[] = {
 201         NFSERR_IO,
 202         NFSERR_IO,
 203         NFSERR_ACCES,
 204         NFSERR_NOSPC,
 205         NFSERR_INVAL,
 206         NFSERR_FBIG,
 207         NFSERR_ROFS,
 208         NFSERR_DQUOT,
 209         NFSERR_STALE,
 210         NFSERR_BADHANDLE,
 211         NFSERR_SERVERFAULT,
 212         NFSERR_DELAY,
 213         0,
 214 };
 215
 216 static short nfsv3err_create[] = {
 217         NFSERR_IO,
 218         NFSERR_EXIST,
 219         NFSERR_NAMETOL,
 220         NFSERR_ACCES,
 221         NFSERR_IO,
 222         NFSERR_NOTDIR,
 223         NFSERR_NOSPC,
 224         NFSERR_ROFS,
 225         NFSERR_DQUOT,
 226         NFSERR_STALE,
 227         NFSERR_BADHANDLE,
 228         NFSERR_NOTSUPP,
 229         NFSERR_SERVERFAULT,
 230         NFSERR_DELAY,
 231         0,
 232 };
 233
 234 static short nfsv3err_mkdir[] = {
 235         NFSERR_IO,
 236         NFSERR_EXIST,
 237         NFSERR_ACCES,
 238         NFSERR_NAMETOL,
 239         NFSERR_IO,
 240         NFSERR_NOTDIR,
 241         NFSERR_NOSPC,
 242         NFSERR_ROFS,
 243         NFSERR_DQUOT,
 244         NFSERR_STALE,
 245         NFSERR_BADHANDLE,
 246         NFSERR_NOTSUPP,
 247         NFSERR_SERVERFAULT,
 248         NFSERR_DELAY,
 249         0,
 250 };
 251
 252 static short nfsv3err_symlink[] = {
 253         NFSERR_IO,
 254         NFSERR_ACCES,
 255         NFSERR_EXIST,
 256         NFSERR_NAMETOL,
 257         NFSERR_NOSPC,
 258         NFSERR_IO,
 259         NFSERR_NOTDIR,
 260         NFSERR_ROFS,
 261         NFSERR_DQUOT,
 262         NFSERR_STALE,
 263         NFSERR_BADHANDLE,
 264         NFSERR_NOTSUPP,
 265         NFSERR_SERVERFAULT,
 266         NFSERR_DELAY,
 267         0,
 268 };
 269
 270 static short nfsv3err_mknod[] = {
 271         NFSERR_IO,
 272         NFSERR_ACCES,
 273         NFSERR_EXIST,
 274         NFSERR_NAMETOL,
 275         NFSERR_NOSPC,
 276         NFSERR_IO,
 277         NFSERR_NOTDIR,
 278         NFSERR_ROFS,
 279         NFSERR_DQUOT,
 280         NFSERR_STALE,
 281         NFSERR_BADHANDLE,
 282         NFSERR_NOTSUPP,
 283         NFSERR_SERVERFAULT,
 284         NFSERR_DELAY,
 285         NFSERR_BADTYPE,
 286         0,
 287 };
 288
 289 static short nfsv3err_remove[] = {
 290         NFSERR_IO,
 291         NFSERR_NOENT,
 292         NFSERR_ACCES,
 293         NFSERR_NAMETOL,
 294         NFSERR_IO,
 295         NFSERR_NOTDIR,
 296         NFSERR_ROFS,
 297         NFSERR_STALE,
 298         NFSERR_BADHANDLE,
 299         NFSERR_SERVERFAULT,
 300         NFSERR_DELAY,
 301         0,
 302 };
 303
 304 static short nfsv3err_rmdir[] = {
 305         NFSERR_IO,
 306         NFSERR_NOENT,
 307         NFSERR_ACCES,
 308         NFSERR_NOTDIR,
 309         NFSERR_NAMETOL,
 310         NFSERR_IO,
 311         NFSERR_EXIST,
 312         NFSERR_INVAL,
 313         NFSERR_ROFS,
 314         NFSERR_NOTEMPTY,
 315         NFSERR_STALE,
 316         NFSERR_BADHANDLE,
 317         NFSERR_NOTSUPP,
 318         NFSERR_SERVERFAULT,
 319         NFSERR_DELAY,
 320         0,
 321 };
 322
 323 static short nfsv3err_rename[] = {
 324         NFSERR_IO,
 325         NFSERR_NOENT,
 326         NFSERR_ACCES,
 327         NFSERR_EXIST,
 328         NFSERR_NAMETOL,
 329         NFSERR_XDEV,
 330         NFSERR_IO,
 331         NFSERR_NOTDIR,
 332         NFSERR_ISDIR,
 333         NFSERR_INVAL,
 334         NFSERR_NOSPC,
 335         NFSERR_ROFS,
 336         NFSERR_MLINK,
 337         NFSERR_NOTEMPTY,
 338         NFSERR_DQUOT,
 339         NFSERR_STALE,
 340         NFSERR_BADHANDLE,
 341         NFSERR_NOTSUPP,
 342         NFSERR_SERVERFAULT,
 343         NFSERR_DELAY,
 344         0,
 345 };
 346
 347 static short nfsv3err_link[] = {
 348         NFSERR_IO,
 349         NFSERR_ACCES,
 350         NFSERR_EXIST,
 351         NFSERR_NAMETOL,
 352         NFSERR_IO,
 353         NFSERR_XDEV,
 354         NFSERR_NOTDIR,
 355         NFSERR_INVAL,
 356         NFSERR_NOSPC,
 357         NFSERR_ROFS,
 358         NFSERR_MLINK,
 359         NFSERR_DQUOT,
 360         NFSERR_STALE,
 361         NFSERR_BADHANDLE,
 362         NFSERR_NOTSUPP,
 363         NFSERR_SERVERFAULT,
 364         NFSERR_DELAY,
 365         0,
 366 };
 367
 368 static short nfsv3err_readdir[] = {
 369         NFSERR_IO,
 370         NFSERR_ACCES,
 371         NFSERR_NOTDIR,
 372         NFSERR_IO,
 373         NFSERR_STALE,
 374         NFSERR_BADHANDLE,
 375         NFSERR_BAD_COOKIE,
 376         NFSERR_TOOSMALL,
 377         NFSERR_SERVERFAULT,
 378         NFSERR_DELAY,
 379         0,
 380 };
 381
 382 static short nfsv3err_readdirplus[] = {
 383         NFSERR_IO,
 384         NFSERR_ACCES,
 385         NFSERR_NOTDIR,
 386         NFSERR_IO,
 387         NFSERR_STALE,
 388         NFSERR_BADHANDLE,
 389         NFSERR_BAD_COOKIE,
 390         NFSERR_NOTSUPP,
 391         NFSERR_TOOSMALL,
 392         NFSERR_SERVERFAULT,
 393         NFSERR_DELAY,
 394         0,
 395 };
 396
 397 static short nfsv3err_fsstat[] = {
 398         NFSERR_IO,
 399         NFSERR_IO,
 400         NFSERR_STALE,
 401         NFSERR_BADHANDLE,
 402         NFSERR_SERVERFAULT,
 403         NFSERR_DELAY,
 404         0,
 405 };
 406
 407 static short nfsv3err_fsinfo[] = {
 408         NFSERR_STALE,
 409         NFSERR_STALE,
 410         NFSERR_BADHANDLE,
 411         NFSERR_SERVERFAULT,
 412         NFSERR_DELAY,
 413         0,
 414 };
 415
 416 static short nfsv3err_pathconf[] = {
 417         NFSERR_STALE,
 418         NFSERR_STALE,
 419         NFSERR_BADHANDLE,
 420         NFSERR_SERVERFAULT,
 421         NFSERR_DELAY,
 422         0,
 423 };
 424
 425 static short nfsv3err_commit[] = {
 426         NFSERR_IO,
 427         NFSERR_IO,
 428         NFSERR_STALE,
 429         NFSERR_BADHANDLE,
 430         NFSERR_SERVERFAULT,
 431         NFSERR_DELAY,
 432         0,
 433 };
 434
 435 static short *nfsrv_v3errmap[] = {
 436         nfsv3err_null,
 437         nfsv3err_getattr,
 438         nfsv3err_setattr,
 439         nfsv3err_lookup,
 440         nfsv3err_access,
 441         nfsv3err_readlink,
 442         nfsv3err_read,
 443         nfsv3err_write,
 444         nfsv3err_create,
 445         nfsv3err_mkdir,
 446         nfsv3err_symlink,
 447         nfsv3err_mknod,
 448         nfsv3err_remove,
 449         nfsv3err_rmdir,
 450         nfsv3err_rename,
 451         nfsv3err_link,
 452         nfsv3err_readdir,
 453         nfsv3err_readdirplus,
 454         nfsv3err_fsstat,
 455         nfsv3err_fsinfo,
 456         nfsv3err_pathconf,
 457         nfsv3err_commit,
 458 };
 459
 460 /*
 461  * And the same for V4.
 462  */
 463 static short nfsv4err_null[] = {
 464         0,
 465         0,
 466 };
 467
 468 static short nfsv4err_access[] = {
 469         NFSERR_IO,
 470         NFSERR_ACCES,
 471         NFSERR_BADHANDLE,
 472         NFSERR_BADXDR,
 473         NFSERR_DELAY,
 474         NFSERR_FHEXPIRED,
 475         NFSERR_INVAL,
 476         NFSERR_IO,
 477         NFSERR_MOVED,
 478         NFSERR_NOFILEHANDLE,
 479         NFSERR_RESOURCE,
 480         NFSERR_SERVERFAULT,
 481         NFSERR_STALE,
 482         0,
 483 };
 484
 485 static short nfsv4err_close[] = {
 486         NFSERR_EXPIRED,
 487         NFSERR_ADMINREVOKED,
 488         NFSERR_BADHANDLE,
 489         NFSERR_BADSEQID,
 490         NFSERR_BADSTATEID,
 491         NFSERR_BADXDR,
 492         NFSERR_DELAY,
 493         NFSERR_EXPIRED,
 494         NFSERR_FHEXPIRED,
 495         NFSERR_INVAL,
 496         NFSERR_ISDIR,
 497         NFSERR_LEASEMOVED,
 498         NFSERR_LOCKSHELD,
 499         NFSERR_MOVED,
 500         NFSERR_NOFILEHANDLE,
 501         NFSERR_OLDSTATEID,
 502         NFSERR_RESOURCE,
 503         NFSERR_SERVERFAULT,
 504         NFSERR_STALE,
 505         NFSERR_STALESTATEID,
 506         0,
 507 };
 508
 509 static short nfsv4err_commit[] = {
 510         NFSERR_IO,
 511         NFSERR_ACCES,
 512         NFSERR_BADHANDLE,
 513         NFSERR_BADXDR,
 514         NFSERR_FHEXPIRED,
 515         NFSERR_INVAL,
 516         NFSERR_IO,
 517         NFSERR_ISDIR,
 518         NFSERR_MOVED,
 519         NFSERR_NOFILEHANDLE,
 520         NFSERR_RESOURCE,
 521         NFSERR_ROFS,
 522         NFSERR_SERVERFAULT,
 523         NFSERR_STALE,
 524         0,
 525 };
 526
 527 static short nfsv4err_create[] = {
 528         NFSERR_IO,
 529         NFSERR_ACCES,
 530         NFSERR_ATTRNOTSUPP,
 531         NFSERR_BADCHAR,
 532         NFSERR_BADHANDLE,
 533         NFSERR_BADNAME,
 534         NFSERR_BADOWNER,
 535         NFSERR_BADTYPE,
 536         NFSERR_BADXDR,
 537         NFSERR_DELAY,
 538         NFSERR_DQUOT,
 539         NFSERR_EXIST,
 540         NFSERR_FHEXPIRED,
 541         NFSERR_INVAL,
 542         NFSERR_IO,
 543         NFSERR_MOVED,
 544         NFSERR_NAMETOL,
 545         NFSERR_NOFILEHANDLE,
 546         NFSERR_NOSPC,
 547         NFSERR_NOTDIR,
 548         NFSERR_PERM,
 549         NFSERR_RESOURCE,
 550         NFSERR_ROFS,
 551         NFSERR_SERVERFAULT,
 552         NFSERR_STALE,
 553         0,
 554 };
 555
 556 static short nfsv4err_delegpurge[] = {
 557         NFSERR_SERVERFAULT,
 558         NFSERR_BADXDR,
 559         NFSERR_NOTSUPP,
 560         NFSERR_LEASEMOVED,
 561         NFSERR_MOVED,
 562         NFSERR_RESOURCE,
 563         NFSERR_SERVERFAULT,
 564         NFSERR_STALECLIENTID,
 565         0,
 566 };
 567
 568 static short nfsv4err_delegreturn[] = {
 569         NFSERR_SERVERFAULT,
 570         NFSERR_ADMINREVOKED,
 571         NFSERR_BADSTATEID,
 572         NFSERR_BADXDR,
 573         NFSERR_EXPIRED,
 574         NFSERR_INVAL,
 575         NFSERR_LEASEMOVED,
 576         NFSERR_MOVED,
 577         NFSERR_NOFILEHANDLE,
 578         NFSERR_NOTSUPP,
 579         NFSERR_OLDSTATEID,
 580         NFSERR_RESOURCE,
 581         NFSERR_SERVERFAULT,
 582         NFSERR_STALE,
 583         NFSERR_STALESTATEID,
 584         0,
 585 };
 586
 587 static short nfsv4err_getattr[] = {
 588         NFSERR_IO,
 589         NFSERR_ACCES,
 590         NFSERR_BADHANDLE,
 591         NFSERR_BADXDR,
 592         NFSERR_DELAY,
 593         NFSERR_FHEXPIRED,
 594         NFSERR_INVAL,
 595         NFSERR_IO,
 596         NFSERR_MOVED,
 597         NFSERR_NOFILEHANDLE,
 598         NFSERR_RESOURCE,
 599         NFSERR_SERVERFAULT,
 600         NFSERR_STALE,
 601         0,
 602 };
 603
 604 static short nfsv4err_getfh[] = {
 605         NFSERR_BADHANDLE,
 606         NFSERR_BADHANDLE,
 607         NFSERR_FHEXPIRED,
 608         NFSERR_MOVED,
 609         NFSERR_NOFILEHANDLE,
 610         NFSERR_RESOURCE,
 611         NFSERR_SERVERFAULT,
 612         NFSERR_STALE,
 613         0,
 614 };
 615
 616 static short nfsv4err_link[] = {
 617         NFSERR_IO,
 618         NFSERR_ACCES,
 619         NFSERR_BADCHAR,
 620         NFSERR_BADHANDLE,
 621         NFSERR_BADNAME,
 622         NFSERR_BADXDR,
 623         NFSERR_DELAY,
 624         NFSERR_DQUOT,
 625         NFSERR_EXIST,
 626         NFSERR_FHEXPIRED,
 627         NFSERR_FILEOPEN,
 628         NFSERR_INVAL,
 629         NFSERR_IO,
 630         NFSERR_ISDIR,
 631         NFSERR_MLINK,
 632         NFSERR_MOVED,
 633         NFSERR_NAMETOL,
 634         NFSERR_NOENT,
 635         NFSERR_NOFILEHANDLE,
 636         NFSERR_NOSPC,
 637         NFSERR_NOTDIR,
 638         NFSERR_NOTSUPP,
 639         NFSERR_RESOURCE,
 640         NFSERR_ROFS,
 641         NFSERR_SERVERFAULT,
 642         NFSERR_STALE,
 643         NFSERR_WRONGSEC,
 644         NFSERR_XDEV,
 645         0,
 646 };
 647
 648 static short nfsv4err_lock[] = {
 649         NFSERR_SERVERFAULT,
 650         NFSERR_ACCES,
 651         NFSERR_ADMINREVOKED,
 652         NFSERR_BADHANDLE,
 653         NFSERR_BADRANGE,
 654         NFSERR_BADSEQID,
 655         NFSERR_BADSTATEID,
 656         NFSERR_BADXDR,
 657         NFSERR_DEADLOCK,
 658         NFSERR_DELAY,
 659         NFSERR_DENIED,
 660         NFSERR_EXPIRED,
 661         NFSERR_FHEXPIRED,
 662         NFSERR_GRACE,
 663         NFSERR_INVAL,
 664         NFSERR_ISDIR,
 665         NFSERR_LEASEMOVED,
 666         NFSERR_LOCKNOTSUPP,
 667         NFSERR_LOCKRANGE,
 668         NFSERR_MOVED,
 669         NFSERR_NOFILEHANDLE,
 670         NFSERR_NOGRACE,
 671         NFSERR_OLDSTATEID,
 672         NFSERR_OPENMODE,
 673         NFSERR_RECLAIMBAD,
 674         NFSERR_RECLAIMCONFLICT,
 675         NFSERR_RESOURCE,
 676         NFSERR_SERVERFAULT,
 677         NFSERR_STALE,
 678         NFSERR_STALECLIENTID,
 679         NFSERR_STALESTATEID,
 680         0,
 681 };
 682
 683 static short nfsv4err_lockt[] = {
 684         NFSERR_SERVERFAULT,
 685         NFSERR_ACCES,
 686         NFSERR_BADHANDLE,
 687         NFSERR_BADRANGE,
 688         NFSERR_BADXDR,
 689         NFSERR_DELAY,
 690         NFSERR_DENIED,
 691         NFSERR_FHEXPIRED,
 692         NFSERR_GRACE,
 693         NFSERR_INVAL,
 694         NFSERR_ISDIR,
 695         NFSERR_LEASEMOVED,
 696         NFSERR_LOCKRANGE,
 697         NFSERR_MOVED,
 698         NFSERR_NOFILEHANDLE,
 699         NFSERR_RESOURCE,
 700         NFSERR_SERVERFAULT,
 701         NFSERR_STALE,
 702         NFSERR_STALECLIENTID,
 703         0,
 704 };
 705
 706 static short nfsv4err_locku[] = {
 707         NFSERR_SERVERFAULT,
 708         NFSERR_ACCES,
 709         NFSERR_ADMINREVOKED,
 710         NFSERR_BADHANDLE,
 711         NFSERR_BADRANGE,
 712         NFSERR_BADSEQID,
 713         NFSERR_BADSTATEID,
 714         NFSERR_BADXDR,
 715         NFSERR_EXPIRED,
 716         NFSERR_FHEXPIRED,
 717         NFSERR_GRACE,
 718         NFSERR_INVAL,
 719         NFSERR_ISDIR,
 720         NFSERR_LEASEMOVED,
 721         NFSERR_LOCKRANGE,
 722         NFSERR_MOVED,
 723         NFSERR_NOFILEHANDLE,
 724         NFSERR_OLDSTATEID,
 725         NFSERR_RESOURCE,
 726         NFSERR_SERVERFAULT,
 727         NFSERR_STALE,
 728         NFSERR_STALESTATEID,
 729         0,
 730 };
 731
 732 static short nfsv4err_lookup[] = {
 733         NFSERR_IO,
 734         NFSERR_ACCES,
 735         NFSERR_BADCHAR,
 736         NFSERR_BADHANDLE,
 737         NFSERR_BADNAME,
 738         NFSERR_BADXDR,
 739         NFSERR_FHEXPIRED,
 740         NFSERR_INVAL,
 741         NFSERR_IO,
 742         NFSERR_MOVED,
 743         NFSERR_NAMETOL,
 744         NFSERR_NOENT,
 745         NFSERR_NOFILEHANDLE,
 746         NFSERR_NOTDIR,
 747         NFSERR_RESOURCE,
 748         NFSERR_SERVERFAULT,
 749         NFSERR_STALE,
 750         NFSERR_SYMLINK,
 751         NFSERR_WRONGSEC,
 752         0,
 753 };
 754
 755 static short nfsv4err_lookupp[] = {
 756         NFSERR_IO,
 757         NFSERR_ACCES,
 758         NFSERR_BADHANDLE,
 759         NFSERR_FHEXPIRED,
 760         NFSERR_IO,
 761         NFSERR_MOVED,
 762         NFSERR_NOENT,
 763         NFSERR_NOFILEHANDLE,
 764         NFSERR_NOTDIR,
 765         NFSERR_RESOURCE,
 766         NFSERR_SERVERFAULT,
 767         NFSERR_STALE,
 768         0,
 769 };
 770
 771 static short nfsv4err_nverify[] = {
 772         NFSERR_IO,
 773         NFSERR_ACCES,
 774         NFSERR_ATTRNOTSUPP,
 775         NFSERR_BADCHAR,
 776         NFSERR_BADHANDLE,
 777         NFSERR_BADXDR,
 778         NFSERR_DELAY,
 779         NFSERR_FHEXPIRED,
 780         NFSERR_INVAL,
 781         NFSERR_IO,
 782         NFSERR_MOVED,
 783         NFSERR_NOFILEHANDLE,
 784         NFSERR_RESOURCE,
 785         NFSERR_SAME,
 786         NFSERR_SERVERFAULT,
 787         NFSERR_STALE,
 788         0,
 789 };
 790
 791 static short nfsv4err_open[] = {
 792         NFSERR_IO,
 793         NFSERR_ACCES,
 794         NFSERR_ADMINREVOKED,
 795         NFSERR_ATTRNOTSUPP,
 796         NFSERR_BADCHAR,
 797         NFSERR_BADHANDLE,
 798         NFSERR_BADNAME,
 799         NFSERR_BADOWNER,
 800         NFSERR_BADSEQID,
 801         NFSERR_BADXDR,
 802         NFSERR_DELAY,
 803         NFSERR_DQUOT,
 804         NFSERR_EXIST,
 805         NFSERR_EXPIRED,
 806         NFSERR_FHEXPIRED,
 807         NFSERR_GRACE,
 808         NFSERR_IO,
 809         NFSERR_INVAL,
 810         NFSERR_ISDIR,
 811         NFSERR_LEASEMOVED,
 812         NFSERR_MOVED,
 813         NFSERR_NAMETOL,
 814         NFSERR_NOENT,
 815         NFSERR_NOFILEHANDLE,
 816         NFSERR_NOGRACE,
 817         NFSERR_NOSPC,
 818         NFSERR_NOTDIR,
 819         NFSERR_NOTSUPP,
 820         NFSERR_PERM,
 821         NFSERR_RECLAIMBAD,
 822         NFSERR_RECLAIMCONFLICT,
 823         NFSERR_RESOURCE,
 824         NFSERR_ROFS,
 825         NFSERR_SERVERFAULT,
 826         NFSERR_SHAREDENIED,
 827         NFSERR_STALE,
 828         NFSERR_STALECLIENTID,
 829         NFSERR_SYMLINK,
 830         NFSERR_WRONGSEC,
 831         0,
 832 };
 833
 834 static short nfsv4err_openattr[] = {
 835         NFSERR_IO,
 836         NFSERR_ACCES,
 837         NFSERR_BADHANDLE,
 838         NFSERR_BADXDR,
 839         NFSERR_DELAY,
 840         NFSERR_DQUOT,
 841         NFSERR_FHEXPIRED,
 842         NFSERR_IO,
 843         NFSERR_MOVED,
 844         NFSERR_NOENT,
 845         NFSERR_NOFILEHANDLE,
 846         NFSERR_NOSPC,
 847         NFSERR_NOTSUPP,
 848         NFSERR_RESOURCE,
 849         NFSERR_ROFS,
 850         NFSERR_SERVERFAULT,
 851         NFSERR_STALE,
 852         0,
 853 };
 854
 855 static short nfsv4err_openconfirm[] = {
 856         NFSERR_SERVERFAULT,
 857         NFSERR_ADMINREVOKED,
 858         NFSERR_BADHANDLE,
 859         NFSERR_BADSEQID,
 860         NFSERR_BADSTATEID,
 861         NFSERR_BADXDR,
 862         NFSERR_EXPIRED,
 863         NFSERR_FHEXPIRED,
 864         NFSERR_INVAL,
 865         NFSERR_ISDIR,
 866         NFSERR_MOVED,
 867         NFSERR_NOFILEHANDLE,
 868         NFSERR_OLDSTATEID,
 869         NFSERR_RESOURCE,
 870         NFSERR_SERVERFAULT,
 871         NFSERR_STALE,
 872         NFSERR_STALESTATEID,
 873         0,
 874 };
 875
 876 static short nfsv4err_opendowngrade[] = {
 877         NFSERR_SERVERFAULT,
 878         NFSERR_ADMINREVOKED,
 879         NFSERR_BADHANDLE,
 880         NFSERR_BADSEQID,
 881         NFSERR_BADSTATEID,
 882         NFSERR_BADXDR,
 883         NFSERR_EXPIRED,
 884         NFSERR_FHEXPIRED,
 885         NFSERR_INVAL,
 886         NFSERR_MOVED,
 887         NFSERR_NOFILEHANDLE,
 888         NFSERR_OLDSTATEID,
 889         NFSERR_RESOURCE,
 890         NFSERR_SERVERFAULT,
 891         NFSERR_STALE,
 892         NFSERR_STALESTATEID,
 893         0,
 894 };
 895
 896 static short nfsv4err_putfh[] = {
 897         NFSERR_SERVERFAULT,
 898         NFSERR_BADHANDLE,
 899         NFSERR_BADXDR,
 900         NFSERR_FHEXPIRED,
 901         NFSERR_MOVED,
 902         NFSERR_RESOURCE,
 903         NFSERR_SERVERFAULT,
 904         NFSERR_STALE,
 905         NFSERR_WRONGSEC,
 906         0,
 907 };
 908
 909 static short nfsv4err_putpubfh[] = {
 910         NFSERR_SERVERFAULT,
 911         NFSERR_RESOURCE,
 912         NFSERR_SERVERFAULT,
 913         NFSERR_WRONGSEC,
 914         0,
 915 };
 916
 917 static short nfsv4err_putrootfh[] = {
 918         NFSERR_SERVERFAULT,
 919         NFSERR_RESOURCE,
 920         NFSERR_SERVERFAULT,
 921         NFSERR_WRONGSEC,
 922         0,
 923 };
 924
 925 static short nfsv4err_read[] = {
 926         NFSERR_IO,
 927         NFSERR_ACCES,
 928         NFSERR_ADMINREVOKED,
 929         NFSERR_BADHANDLE,
 930         NFSERR_BADSTATEID,
 931         NFSERR_BADXDR,
 932         NFSERR_DELAY,
 933         NFSERR_EXPIRED,
 934         NFSERR_FHEXPIRED,
 935         NFSERR_GRACE,
 936         NFSERR_IO,
 937         NFSERR_INVAL,
 938         NFSERR_ISDIR,
 939         NFSERR_LEASEMOVED,
 940         NFSERR_LOCKED,
 941         NFSERR_MOVED,
 942         NFSERR_NOFILEHANDLE,
 943         NFSERR_NXIO,
 944         NFSERR_OLDSTATEID,
 945         NFSERR_OPENMODE,
 946         NFSERR_RESOURCE,
 947         NFSERR_SERVERFAULT,
 948         NFSERR_STALE,
 949         NFSERR_STALESTATEID,
 950         0,
 951 };
 952
 953 static short nfsv4err_readdir[] = {
 954         NFSERR_IO,
 955         NFSERR_ACCES,
 956         NFSERR_BADHANDLE,
 957         NFSERR_BAD_COOKIE,
 958         NFSERR_BADXDR,
 959         NFSERR_DELAY,
 960         NFSERR_FHEXPIRED,
 961         NFSERR_INVAL,
 962         NFSERR_IO,
 963         NFSERR_MOVED,
 964         NFSERR_NOFILEHANDLE,
 965         NFSERR_NOTDIR,
 966         NFSERR_NOTSAME,
 967         NFSERR_RESOURCE,
 968         NFSERR_SERVERFAULT,
 969         NFSERR_STALE,
 970         NFSERR_TOOSMALL,
 971         0,
 972 };
 973
 974 static short nfsv4err_readlink[] = {
 975         NFSERR_IO,
 976         NFSERR_ACCES,
 977         NFSERR_BADHANDLE,
 978         NFSERR_DELAY,
 979         NFSERR_FHEXPIRED,
 980         NFSERR_INVAL,
 981         NFSERR_IO,
 982         NFSERR_ISDIR,
 983         NFSERR_MOVED,
 984         NFSERR_NOFILEHANDLE,
 985         NFSERR_NOTSUPP,
 986         NFSERR_RESOURCE,
 987         NFSERR_SERVERFAULT,
 988         NFSERR_STALE,
 989         0,
 990 };
 991
 992 static short nfsv4err_remove[] = {
 993         NFSERR_IO,
 994         NFSERR_ACCES,
 995         NFSERR_BADCHAR,
 996         NFSERR_BADHANDLE,
 997         NFSERR_BADNAME,
 998         NFSERR_BADXDR,
 999         NFSERR_DELAY,
1000         NFSERR_FHEXPIRED,
1001         NFSERR_FILEOPEN,
1002         NFSERR_INVAL,
1003         NFSERR_IO,
1004         NFSERR_MOVED,
1005         NFSERR_NAMETOL,
1006         NFSERR_NOENT,
1007         NFSERR_NOFILEHANDLE,
1008         NFSERR_NOTDIR,
1009         NFSERR_NOTEMPTY,
1010         NFSERR_RESOURCE,
1011         NFSERR_ROFS,
1012         NFSERR_SERVERFAULT,
1013         NFSERR_STALE,
1014         0,
1015 };
1016
1017 static short nfsv4err_rename[] = {
1018         NFSERR_IO,
1019         NFSERR_ACCES,
1020         NFSERR_BADCHAR,
1021         NFSERR_BADHANDLE,
1022         NFSERR_BADNAME,
1023         NFSERR_BADXDR,
1024         NFSERR_DELAY,
1025         NFSERR_DQUOT,
1026         NFSERR_EXIST,
1027         NFSERR_FHEXPIRED,
1028         NFSERR_FILEOPEN,
1029         NFSERR_INVAL,
1030         NFSERR_IO,
1031         NFSERR_MOVED,
1032         NFSERR_NAMETOL,
1033         NFSERR_NOENT,
1034         NFSERR_NOFILEHANDLE,
1035         NFSERR_NOSPC,
1036         NFSERR_NOTDIR,
1037         NFSERR_NOTEMPTY,
1038         NFSERR_RESOURCE,
1039         NFSERR_ROFS,
1040         NFSERR_SERVERFAULT,
1041         NFSERR_STALE,
1042         NFSERR_WRONGSEC,
1043         NFSERR_XDEV,
1044         0,
1045 };
1046
1047 static short nfsv4err_renew[] = {
1048         NFSERR_SERVERFAULT,
1049         NFSERR_ACCES,
1050         NFSERR_ADMINREVOKED,
1051         NFSERR_BADXDR,
1052         NFSERR_CBPATHDOWN,
1053         NFSERR_EXPIRED,
1054         NFSERR_LEASEMOVED,
1055         NFSERR_RESOURCE,
1056         NFSERR_SERVERFAULT,
1057         NFSERR_STALECLIENTID,
1058         0,
1059 };
1060
1061 static short nfsv4err_restorefh[] = {
1062         NFSERR_SERVERFAULT,
1063         NFSERR_BADHANDLE,
1064         NFSERR_FHEXPIRED,
1065         NFSERR_MOVED,
1066         NFSERR_RESOURCE,
1067         NFSERR_RESTOREFH,
1068         NFSERR_SERVERFAULT,
1069         NFSERR_STALE,
1070         NFSERR_WRONGSEC,
1071         0,
1072 };
1073
1074 static short nfsv4err_savefh[] = {
1075         NFSERR_SERVERFAULT,
1076         NFSERR_BADHANDLE,
1077         NFSERR_FHEXPIRED,
1078         NFSERR_MOVED,
1079         NFSERR_NOFILEHANDLE,
1080         NFSERR_RESOURCE,
1081         NFSERR_SERVERFAULT,
1082         NFSERR_STALE,
1083         0,
1084 };
1085
1086 static short nfsv4err_secinfo[] = {
1087         NFSERR_SERVERFAULT,
1088         NFSERR_ACCES,
1089         NFSERR_BADCHAR,
1090         NFSERR_BADHANDLE,
1091         NFSERR_BADNAME,
1092         NFSERR_BADXDR,
1093         NFSERR_FHEXPIRED,
1094         NFSERR_INVAL,
1095         NFSERR_MOVED,
1096         NFSERR_NAMETOL,
1097         NFSERR_NOENT,
1098         NFSERR_NOFILEHANDLE,
1099         NFSERR_NOTDIR,
1100         NFSERR_RESOURCE,
1101         NFSERR_SERVERFAULT,
1102         NFSERR_STALE,
1103         0,
1104 };
1105
1106 static short nfsv4err_setattr[] = {
1107         NFSERR_IO,
1108         NFSERR_ACCES,
1109         NFSERR_ADMINREVOKED,
1110         NFSERR_ATTRNOTSUPP,
1111         NFSERR_BADCHAR,
1112         NFSERR_BADHANDLE,
1113         NFSERR_BADOWNER,
1114         NFSERR_BADSTATEID,
1115         NFSERR_BADXDR,
1116         NFSERR_DELAY,
1117         NFSERR_DQUOT,
1118         NFSERR_EXPIRED,
1119         NFSERR_FBIG,
1120         NFSERR_FHEXPIRED,
1121         NFSERR_GRACE,
1122         NFSERR_INVAL,
1123         NFSERR_IO,
1124         NFSERR_ISDIR,
1125         NFSERR_LOCKED,
1126         NFSERR_MOVED,
1127         NFSERR_NOFILEHANDLE,
1128         NFSERR_NOSPC,
1129         NFSERR_OLDSTATEID,
1130         NFSERR_OPENMODE,
1131         NFSERR_PERM,
1132         NFSERR_RESOURCE,
1133         NFSERR_ROFS,
1134         NFSERR_SERVERFAULT,
1135         NFSERR_STALE,
1136         NFSERR_STALESTATEID,
1137         0,
1138 };
1139
1140 static short nfsv4err_setclientid[] = {
1141         NFSERR_SERVERFAULT,
1142         NFSERR_BADXDR,
1143         NFSERR_CLIDINUSE,
1144         NFSERR_INVAL,
1145         NFSERR_RESOURCE,
1146         NFSERR_SERVERFAULT,
1147         NFSERR_WRONGSEC,
1148         0,
1149 };
1150
1151 static short nfsv4err_setclientidconfirm[] = {
1152         NFSERR_SERVERFAULT,
1153         NFSERR_BADXDR,
1154         NFSERR_CLIDINUSE,
1155         NFSERR_RESOURCE,
1156         NFSERR_SERVERFAULT,
1157         NFSERR_STALECLIENTID,
1158         0,
1159 };
1160
1161 static short nfsv4err_verify[] = {
1162         NFSERR_SERVERFAULT,
1163         NFSERR_ACCES,
1164         NFSERR_ATTRNOTSUPP,
1165         NFSERR_BADCHAR,
1166         NFSERR_BADHANDLE,
1167         NFSERR_BADXDR,
1168         NFSERR_DELAY,
1169         NFSERR_FHEXPIRED,
1170         NFSERR_INVAL,
1171         NFSERR_MOVED,
1172         NFSERR_NOFILEHANDLE,
1173         NFSERR_NOTSAME,
1174         NFSERR_RESOURCE,
1175         NFSERR_SERVERFAULT,
1176         NFSERR_STALE,
1177         0,
1178 };
1179
1180 static short nfsv4err_write[] = {
1181         NFSERR_IO,
1182         NFSERR_ACCES,
1183         NFSERR_ADMINREVOKED,
1184         NFSERR_BADHANDLE,
1185         NFSERR_BADSTATEID,
1186         NFSERR_BADXDR,
1187         NFSERR_DELAY,
1188         NFSERR_DQUOT,
1189         NFSERR_EXPIRED,
1190         NFSERR_FBIG,
1191         NFSERR_FHEXPIRED,
1192         NFSERR_GRACE,
1193         NFSERR_INVAL,
1194         NFSERR_IO,
1195         NFSERR_ISDIR,
1196         NFSERR_LEASEMOVED,
1197         NFSERR_LOCKED,
1198         NFSERR_MOVED,
1199         NFSERR_NOFILEHANDLE,
1200         NFSERR_NOSPC,
1201         NFSERR_NXIO,
1202         NFSERR_OLDSTATEID,
1203         NFSERR_OPENMODE,
1204         NFSERR_RESOURCE,
1205         NFSERR_ROFS,
1206         NFSERR_SERVERFAULT,
1207         NFSERR_STALE,
1208         NFSERR_STALESTATEID,
1209         0,
1210 };
1211
1212 static short nfsv4err_releaselockowner[] = {
1213         NFSERR_SERVERFAULT,
1214         NFSERR_ADMINREVOKED,
1215         NFSERR_BADXDR,
1216         NFSERR_EXPIRED,
1217         NFSERR_LEASEMOVED,
1218         NFSERR_LOCKSHELD,
1219         NFSERR_RESOURCE,
1220         NFSERR_SERVERFAULT,
1221         NFSERR_STALECLIENTID,
1222         0,
1223 };
1224
1225 static short *nfsrv_v4errmap[] = {
1226         nfsv4err_null,
1227         nfsv4err_null,
1228         nfsv4err_null,
1229         nfsv4err_access,
1230         nfsv4err_close,
1231         nfsv4err_commit,
1232         nfsv4err_create,
1233         nfsv4err_delegpurge,
1234         nfsv4err_delegreturn,
1235         nfsv4err_getattr,
1236         nfsv4err_getfh,
1237         nfsv4err_link,
1238         nfsv4err_lock,
1239         nfsv4err_lockt,
1240         nfsv4err_locku,
1241         nfsv4err_lookup,
1242         nfsv4err_lookupp,
1243         nfsv4err_nverify,
1244         nfsv4err_open,
1245         nfsv4err_openattr,
1246         nfsv4err_openconfirm,
1247         nfsv4err_opendowngrade,
1248         nfsv4err_putfh,
1249         nfsv4err_putpubfh,
1250         nfsv4err_putrootfh,
1251         nfsv4err_read,
1252         nfsv4err_readdir,
1253         nfsv4err_readlink,
1254         nfsv4err_remove,
1255         nfsv4err_rename,
1256         nfsv4err_renew,
1257         nfsv4err_restorefh,
1258         nfsv4err_savefh,
1259         nfsv4err_secinfo,
1260         nfsv4err_setattr,
1261         nfsv4err_setclientid,
1262         nfsv4err_setclientidconfirm,
1263         nfsv4err_verify,
1264         nfsv4err_write,
1265         nfsv4err_releaselockowner,
1266 };
1267
1268 /*
1269  * A fiddled version of m_adj() that ensures null fill to a long
1270  * boundary and only trims off the back end
1271  */
1272 APPLESTATIC void
1273 nfsrv_adj(mbuf_t mp, int len, int nul)
1274 {
1275         mbuf_t m;
1276         int count, i;
1277         char *cp;
1278
1279         /*
1280          * Trim from tail.  Scan the mbuf chain,
1281          * calculating its length and finding the last mbuf.
1282          * If the adjustment only affects this mbuf, then just
1283          * adjust and return.  Otherwise, rescan and truncate
1284          * after the remaining size.
1285          */
1286         count = 0;
1287         m = mp;
1288         for (;;) {
1289                 count += mbuf_len(m);
1290                 if (mbuf_next(m) == NULL)
1291                         break;
1292                 m = mbuf_next(m);
1293         }
1294         if (mbuf_len(m) > len) {
1295                 mbuf_setlen(m, mbuf_len(m) - len);
1296                 if (nul > 0) {
1297                         cp = NFSMTOD(m, caddr_t) + mbuf_len(m) - nul;
1298                         for (i = 0; i < nul; i++)
1299                                 *cp++ = '\0';
1300                 }
1301                 return;
1302         }
1303         count -= len;
1304         if (count < 0)
1305                 count = 0;
1306         /*
1307          * Correct length for chain is "count".
1308          * Find the mbuf with last data, adjust its length,
1309          * and toss data from remaining mbufs on chain.
1310          */
1311         for (m = mp; m; m = mbuf_next(m)) {
1312                 if (mbuf_len(m) >= count) {
1313                         mbuf_setlen(m, count);
1314                         if (nul > 0) {
1315                                 cp = NFSMTOD(m, caddr_t) + mbuf_len(m) - nul;
1316                                 for (i = 0; i < nul; i++)
1317                                         *cp++ = '\0';
1318                         }
1319                         break;
1320                 }
1321                 count -= mbuf_len(m);
1322         }
1323         for (m = mbuf_next(m); m; m = mbuf_next(m))
1324                 mbuf_setlen(m, 0);
1325 }
1326
1327 /*
1328  * Make these functions instead of macros, so that the kernel text size
1329  * doesn't get too big...
1330  */
1331 APPLESTATIC void
1332 nfsrv_wcc(struct nfsrv_descript *nd, int before_ret,
1333     struct nfsvattr *before_nvap, int after_ret, struct nfsvattr *after_nvap)
1334 {
1335         u_int32_t *tl;
1336
1337         if (before_ret) {
1338                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
1339                 *tl = newnfs_false;
1340         } else {
1341                 NFSM_BUILD(tl, u_int32_t *, 7 * NFSX_UNSIGNED);
1342                 *tl++ = newnfs_true;
1343                 txdr_hyper(before_nvap->na_size, tl);
1344                 tl += 2;
1345                 txdr_nfsv3time(&(before_nvap->na_mtime), tl);
1346                 tl += 2;
1347                 txdr_nfsv3time(&(before_nvap->na_ctime), tl);
1348         }
1349         nfsrv_postopattr(nd, after_ret, after_nvap);
1350 }
1351
1352 APPLESTATIC void
1353 nfsrv_postopattr(struct nfsrv_descript *nd, int after_ret,
1354     struct nfsvattr *after_nvap)
1355 {
1356         u_int32_t *tl;
1357
1358         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
1359         if (after_ret)
1360                 *tl = newnfs_false;
1361         else {
1362                 *tl = newnfs_true;
1363                 nfsrv_fillattr(nd, after_nvap);
1364         }
1365 }
1366
1367 /*
1368  * Fill in file attributes for V2 and 3. For V4, call a separate
1369  * routine that sifts through all the attribute bits.
1370  */
1371 APPLESTATIC void
1372 nfsrv_fillattr(struct nfsrv_descript *nd, struct nfsvattr *nvap)
1373 {
1374         struct nfs_fattr *fp;
1375         int fattr_size;
1376
1377         /*
1378          * Build space for the attribute structure.
1379          */
1380         if (nd->nd_flag & ND_NFSV3)
1381                 fattr_size = NFSX_V3FATTR;
1382         else
1383                 fattr_size = NFSX_V2FATTR;
1384         NFSM_BUILD(fp, struct nfs_fattr *, fattr_size);
1385
1386         /*
1387          * Now just fill it all in.
1388          */
1389         fp->fa_nlink = txdr_unsigned(nvap->na_nlink);
1390         fp->fa_uid = txdr_unsigned(nvap->na_uid);
1391         fp->fa_gid = txdr_unsigned(nvap->na_gid);
1392         if (nd->nd_flag & ND_NFSV3) {
1393                 fp->fa_type = vtonfsv34_type(nvap->na_type);
1394                 fp->fa_mode = vtonfsv34_mode(nvap->na_mode);
1395                 txdr_hyper(nvap->na_size, &fp->fa3_size);
1396                 txdr_hyper(nvap->na_bytes, &fp->fa3_used);
1397                 fp->fa3_rdev.specdata1 = txdr_unsigned(NFSMAJOR(nvap->na_rdev));
1398                 fp->fa3_rdev.specdata2 = txdr_unsigned(NFSMINOR(nvap->na_rdev));
1399                 fp->fa3_fsid.nfsuquad[0] = 0;
1400                 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(nvap->na_fsid);
1401                 fp->fa3_fileid.nfsuquad[0] = 0;
1402                 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(nvap->na_fileid);
1403                 txdr_nfsv3time(&nvap->na_atime, &fp->fa3_atime);
1404                 txdr_nfsv3time(&nvap->na_mtime, &fp->fa3_mtime);
1405                 txdr_nfsv3time(&nvap->na_ctime, &fp->fa3_ctime);
1406         } else {
1407                 fp->fa_type = vtonfsv2_type(nvap->na_type);
1408                 fp->fa_mode = vtonfsv2_mode(nvap->na_type, nvap->na_mode);
1409                 fp->fa2_size = txdr_unsigned(nvap->na_size);
1410                 fp->fa2_blocksize = txdr_unsigned(nvap->na_blocksize);
1411                 if (nvap->na_type == VFIFO)
1412                         fp->fa2_rdev = 0xffffffff;
1413                 else
1414                         fp->fa2_rdev = txdr_unsigned(nvap->na_rdev);
1415                 fp->fa2_blocks = txdr_unsigned(nvap->na_bytes / NFS_FABLKSIZE);
1416                 fp->fa2_fsid = txdr_unsigned(nvap->na_fsid);
1417                 fp->fa2_fileid = txdr_unsigned(nvap->na_fileid);
1418                 txdr_nfsv2time(&nvap->na_atime, &fp->fa2_atime);
1419                 txdr_nfsv2time(&nvap->na_mtime, &fp->fa2_mtime);
1420                 txdr_nfsv2time(&nvap->na_ctime, &fp->fa2_ctime);
1421         }
1422 }
1423
1424 /*
1425  * This function gets a file handle out of an mbuf list.
1426  * It returns 0 for success, EBADRPC otherwise.
1427  * If sets the third flagp argument to 1 if the file handle is
1428  * the public file handle.
1429  * For NFSv4, if the length is incorrect, set nd_repstat == NFSERR_BADHANDLE
1430  */
1431 APPLESTATIC int
1432 nfsrv_mtofh(struct nfsrv_descript *nd, struct nfsrvfh *fhp)
1433 {
1434         u_int32_t *tl;
1435         int error = 0, len, copylen;
1436
1437         if (nd->nd_flag & (ND_NFSV3 | ND_NFSV4)) {
1438                 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
1439                 len = fxdr_unsigned(int, *tl);
1440                 if (len == 0 && nfs_pubfhset && (nd->nd_flag & ND_NFSV3) &&
1441                     nd->nd_procnum == NFSPROC_LOOKUP) {
1442                         nd->nd_flag |= ND_PUBLOOKUP;
1443                         goto nfsmout;
1444                 }
1445                 if (len < NFSRV_MINFH || len > NFSRV_MAXFH) {
1446                         if (nd->nd_flag & ND_NFSV4) {
1447                             if (len > 0 && len <= NFSX_V4FHMAX) {
1448                                 error = nfsm_advance(nd, NFSM_RNDUP(len), -1);
1449                                 if (error)
1450                                         goto nfsmout;
1451                                 nd->nd_repstat = NFSERR_BADHANDLE;
1452                                 goto nfsmout;
1453                             } else {
1454                                     error = EBADRPC;
1455                                     goto nfsmout;
1456                             }
1457                         } else {
1458                                 error = EBADRPC;
1459                                 goto nfsmout;
1460                         }
1461                 }
1462                 copylen = len;
1463         } else {
1464                 /*
1465                  * For NFSv2, the file handle is always 32 bytes on the
1466                  * wire, but this server only cares about the first
1467                  * NFSRV_MAXFH bytes.
1468                  */
1469                 len = NFSX_V2FH;
1470                 copylen = NFSRV_MAXFH;
1471         }
1472         NFSM_DISSECT(tl, u_int32_t *, len);
1473         if ((nd->nd_flag & ND_NFSV2) && nfs_pubfhset &&
1474             nd->nd_procnum == NFSPROC_LOOKUP &&
1475             !NFSBCMP((caddr_t)tl, nfs_v2pubfh, NFSX_V2FH)) {
1476                 nd->nd_flag |= ND_PUBLOOKUP;
1477                 goto nfsmout;
1478         }
1479         NFSBCOPY(tl, (caddr_t)fhp->nfsrvfh_data, copylen);
1480         fhp->nfsrvfh_len = copylen;
1481 nfsmout:
1482         NFSEXITCODE2(error, nd);
1483         return (error);
1484 }
1485
1486 /*
1487  * Map errnos to NFS error numbers. For Version 3 and 4 also filter out error
1488  * numbers not specified for the associated procedure.
1489  * NFSPROC_NOOP is a special case, where the high order bits of nd_repstat
1490  * should be cleared. NFSPROC_NOOP is used to return errors when a valid
1491  * RPC procedure is not involved.
1492  * Returns the error number in XDR.
1493  */
1494 APPLESTATIC int
1495 nfsd_errmap(struct nfsrv_descript *nd)
1496 {
1497         short *defaulterrp, *errp;
1498
1499         if (!nd->nd_repstat)
1500                 return (0);
1501         if (nd->nd_flag & (ND_NFSV3 | ND_NFSV4)) {
1502                 if (nd->nd_procnum == NFSPROC_NOOP)
1503                         return (txdr_unsigned(nd->nd_repstat & 0xffff));
1504                 if (nd->nd_flag & ND_NFSV3)
1505                     errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum];
1506                 else if (nd->nd_repstat == EBADRPC)
1507                         return (txdr_unsigned(NFSERR_BADXDR));
1508                 else if (nd->nd_repstat == NFSERR_MINORVERMISMATCH ||
1509                          nd->nd_repstat == NFSERR_OPILLEGAL)
1510                         return (txdr_unsigned(nd->nd_repstat));
1511                 else if ((nd->nd_flag & ND_NFSV41) != 0) {
1512                         if (nd->nd_repstat == EOPNOTSUPP)
1513                                 nd->nd_repstat = NFSERR_NOTSUPP;
1514                         nd->nd_repstat = nfsrv_isannfserr(nd->nd_repstat);
1515                         return (txdr_unsigned(nd->nd_repstat));
1516                 } else
1517                     errp = defaulterrp = nfsrv_v4errmap[nd->nd_procnum];
1518                 while (*++errp)
1519                         if (*errp == nd->nd_repstat)
1520                                 return (txdr_unsigned(nd->nd_repstat));
1521                 return (txdr_unsigned(*defaulterrp));
1522         }
1523         if (nd->nd_repstat <= NFSERR_REMOTE)
1524                 return (txdr_unsigned(nfsrv_v2errmap[nd->nd_repstat - 1]));
1525         return (txdr_unsigned(NFSERR_IO));
1526 }
1527
1528 /*
1529  * Check to see if the error is a valid NFS one. If not, replace it with
1530  * NFSERR_IO.
1531  */
1532 static u_int32_t
1533 nfsrv_isannfserr(u_int32_t errval)
1534 {
1535
1536         if (errval == NFSERR_OK)
1537                 return (errval);
1538         if (errval >= NFSERR_BADHANDLE && errval <= NFSERR_DELEGREVOKED)
1539                 return (errval);
1540         if (errval > 0 && errval <= NFSERR_REMOTE)
1541                 return (nfsrv_v2errmap[errval - 1]);
1542         return (NFSERR_IO);
1543 }
1544
1545 /*
1546  * Check to see if setting a uid/gid is permitted when creating a new
1547  * file object. (Called when uid and/or gid is specified in the
1548  * settable attributes for V4.
1549  */
1550 APPLESTATIC int
1551 nfsrv_checkuidgid(struct nfsrv_descript *nd, struct nfsvattr *nvap)
1552 {
1553         int error = 0;
1554
1555         /*
1556          * If not setting either uid nor gid, it's OK.
1557          */
1558         if (NFSVNO_NOTSETUID(nvap) && NFSVNO_NOTSETGID(nvap))
1559                 goto out;
1560         if ((NFSVNO_ISSETUID(nvap) && nvap->na_uid == nfsrv_defaultuid &&
1561            enable_nobodycheck == 1)
1562             || (NFSVNO_ISSETGID(nvap) && nvap->na_gid == nfsrv_defaultgid &&
1563            enable_nogroupcheck == 1)) {
1564                 error = NFSERR_BADOWNER;
1565                 goto out;
1566         }
1567         if (nd->nd_cred->cr_uid == 0)
1568                 goto out;
1569         if ((NFSVNO_ISSETUID(nvap) && nvap->na_uid != nd->nd_cred->cr_uid) ||
1570             (NFSVNO_ISSETGID(nvap) && nvap->na_gid != nd->nd_cred->cr_gid &&
1571             !groupmember(nvap->na_gid, nd->nd_cred)))
1572                 error = NFSERR_PERM;
1573
1574 out:
1575         NFSEXITCODE2(error, nd);
1576         return (error);
1577 }
1578
1579 /*
1580  * and this routine fixes up the settable attributes for V4 if allowed
1581  * by nfsrv_checkuidgid().
1582  */
1583 APPLESTATIC void
1584 nfsrv_fixattr(struct nfsrv_descript *nd, vnode_t vp,
1585     struct nfsvattr *nvap, NFSACL_T *aclp, NFSPROC_T *p, nfsattrbit_t *attrbitp,
1586     struct nfsexstuff *exp)
1587 {
1588         int change = 0;
1589         struct nfsvattr nva;
1590         uid_t tuid;
1591         int error;
1592         nfsattrbit_t nattrbits;
1593
1594         /*
1595          * Maybe this should be done for V2 and 3 but it never has been
1596          * and nobody seems to be upset, so I think it's best not to change
1597          * the V2 and 3 semantics.
1598          */
1599         if ((nd->nd_flag & ND_NFSV4) == 0)
1600                 goto out;
1601         NFSVNO_ATTRINIT(&nva);
1602         NFSZERO_ATTRBIT(&nattrbits);
1603         tuid = nd->nd_cred->cr_uid;
1604         if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNER) &&
1605             NFSVNO_ISSETUID(nvap) &&
1606             nvap->na_uid != nd->nd_cred->cr_uid) {
1607                 if (nd->nd_cred->cr_uid == 0) {
1608                         nva.na_uid = nvap->na_uid;
1609                         change++;
1610                         NFSSETBIT_ATTRBIT(&nattrbits, NFSATTRBIT_OWNER);
1611                 } else {
1612                         NFSCLRBIT_ATTRBIT(attrbitp, NFSATTRBIT_OWNER);
1613                 }
1614         }
1615         if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_TIMEACCESSSET) &&
1616             NFSVNO_ISSETATIME(nvap)) {
1617                 nva.na_atime = nvap->na_atime;
1618                 change++;
1619                 NFSSETBIT_ATTRBIT(&nattrbits, NFSATTRBIT_TIMEACCESSSET);
1620         }
1621         if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_TIMEMODIFYSET) &&
1622             NFSVNO_ISSETMTIME(nvap)) {
1623                 nva.na_mtime = nvap->na_mtime;
1624                 change++;
1625                 NFSSETBIT_ATTRBIT(&nattrbits, NFSATTRBIT_TIMEMODIFYSET);
1626         }
1627         if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNERGROUP) &&
1628             NFSVNO_ISSETGID(nvap)) {
1629                 if (nvap->na_gid == nd->nd_cred->cr_gid ||
1630                     groupmember(nvap->na_gid, nd->nd_cred)) {
1631                         nd->nd_cred->cr_uid = 0;
1632                         nva.na_gid = nvap->na_gid;
1633                         change++;
1634                         NFSSETBIT_ATTRBIT(&nattrbits, NFSATTRBIT_OWNERGROUP);
1635                 } else {
1636                         NFSCLRBIT_ATTRBIT(attrbitp, NFSATTRBIT_OWNERGROUP);
1637                 }
1638         }
1639         if (change) {
1640                 error = nfsvno_setattr(vp, &nva, nd->nd_cred, p, exp);
1641                 if (error) {
1642                         NFSCLRALL_ATTRBIT(attrbitp, &nattrbits);
1643                 }
1644         }
1645         if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SIZE) &&
1646             NFSVNO_ISSETSIZE(nvap) && nvap->na_size != (u_quad_t)0) {
1647                 NFSCLRBIT_ATTRBIT(attrbitp, NFSATTRBIT_SIZE);
1648         }
1649 #ifdef NFS4_ACL_EXTATTR_NAME
1650         if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_ACL) &&
1651             nfsrv_useacl != 0 && aclp != NULL) {
1652                 if (aclp->acl_cnt > 0) {
1653                         error = nfsrv_setacl(vp, aclp, nd->nd_cred, p);
1654                         if (error) {
1655                                 NFSCLRBIT_ATTRBIT(attrbitp, NFSATTRBIT_ACL);
1656                         }
1657                 }
1658         } else
1659 #endif
1660         NFSCLRBIT_ATTRBIT(attrbitp, NFSATTRBIT_ACL);
1661         nd->nd_cred->cr_uid = tuid;
1662
1663 out:
1664         NFSEXITCODE2(0, nd);
1665 }
1666
1667 /*
1668  * Translate an ASCII hex digit to it's binary value. Return -1 if the
1669  * char isn't a hex digit.
1670  */
1671 static char
1672 nfsrv_hexdigit(char c, int *err)
1673 {
1674
1675         *err = 0;
1676         if (c >= '0' && c <= '9')
1677                 return (c - '0');
1678         if (c >= 'a' && c <= 'f')
1679                 return (c - 'a' + ((char)10));
1680         if (c >= 'A' && c <= 'F')
1681                 return (c - 'A' + ((char)10));
1682         /* Not valid ! */
1683         *err = 1;
1684         return (1);     /* BOGUS */
1685 }
1686
1687 /*
1688  * Check to see if NFSERR_MOVED can be returned for this op. Return 1 iff
1689  * it can be.
1690  */
1691 APPLESTATIC int
1692 nfsrv_errmoved(int op)
1693 {
1694         short *errp;
1695
1696         errp = nfsrv_v4errmap[op];
1697         while (*errp != 0) {
1698                 if (*errp == NFSERR_MOVED)
1699                         return (1);
1700                 errp++;
1701         }
1702         return (0);
1703 }
1704
1705 /*
1706  * Fill in attributes for a Referral.
1707  * (Return the number of bytes of XDR created.)
1708  */
1709 APPLESTATIC int
1710 nfsrv_putreferralattr(struct nfsrv_descript *nd, nfsattrbit_t *retbitp,
1711     struct nfsreferral *refp, int getattr, int *reterrp)
1712 {
1713         u_int32_t *tl, *retnump;
1714         u_char *cp, *cp2;
1715         int prefixnum, retnum = 0, i, len, bitpos, rderrbit = 0, nonrefbit = 0;
1716         int fslocationsbit = 0;
1717         nfsattrbit_t tmpbits, refbits;
1718
1719         NFSREFERRAL_ATTRBIT(&refbits);
1720         if (getattr)
1721                 NFSCLRBIT_ATTRBIT(&refbits, NFSATTRBIT_RDATTRERROR);
1722         else if (NFSISSET_ATTRBIT(retbitp, NFSATTRBIT_RDATTRERROR))
1723                 rderrbit = 1;
1724         if (NFSISSET_ATTRBIT(retbitp, NFSATTRBIT_FSLOCATIONS))
1725                 fslocationsbit = 1;
1726
1727         /*
1728          * Check for the case where unsupported referral attributes are
1729          * requested.
1730          */
1731         NFSSET_ATTRBIT(&tmpbits, retbitp);
1732         NFSCLRALL_ATTRBIT(&tmpbits, &refbits);
1733         if (NFSNONZERO_ATTRBIT(&tmpbits))
1734                 nonrefbit = 1;
1735
1736         if (nonrefbit && !fslocationsbit && (getattr || !rderrbit)) {
1737                 *reterrp = NFSERR_MOVED;
1738                 return (0);
1739         }
1740
1741         /*
1742          * Now we can fill in the attributes.
1743          */
1744         NFSSET_ATTRBIT(&tmpbits, retbitp);
1745         NFSCLRNOT_ATTRBIT(&tmpbits, &refbits);
1746
1747         /*
1748          * Put out the attribute bitmap for the ones being filled in
1749          * and get the field for the number of attributes returned.
1750          */
1751         prefixnum = nfsrv_putattrbit(nd, &tmpbits);
1752         NFSM_BUILD(retnump, u_int32_t *, NFSX_UNSIGNED);
1753         prefixnum += NFSX_UNSIGNED;
1754
1755         /*
1756          * Now, loop around filling in the attributes for each bit set.
1757          */
1758         for (bitpos = 0; bitpos < NFSATTRBIT_MAX; bitpos++) {
1759             if (NFSISSET_ATTRBIT(&tmpbits, bitpos)) {
1760                 switch (bitpos) {
1761                 case NFSATTRBIT_TYPE:
1762                         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
1763                         *tl = txdr_unsigned(NFDIR);
1764                         retnum += NFSX_UNSIGNED;
1765                         break;
1766                 case NFSATTRBIT_FSID:
1767                         NFSM_BUILD(tl, u_int32_t *, NFSX_V4FSID);
1768                         *tl++ = 0;
1769                         *tl++ = txdr_unsigned(NFSV4ROOT_FSID0);
1770                         *tl++ = 0;
1771                         *tl = txdr_unsigned(NFSV4ROOT_REFERRAL);
1772                         retnum += NFSX_V4FSID;
1773                         break;
1774                 case NFSATTRBIT_RDATTRERROR:
1775                         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
1776                         if (nonrefbit)
1777                                 *tl = txdr_unsigned(NFSERR_MOVED);
1778                         else
1779                                 *tl = 0;
1780                         retnum += NFSX_UNSIGNED;
1781                         break;
1782                 case NFSATTRBIT_FSLOCATIONS:
1783                         retnum += nfsm_strtom(nd, "/", 1);
1784                         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
1785                         *tl = txdr_unsigned(refp->nfr_srvcnt);
1786                         retnum += NFSX_UNSIGNED;
1787                         cp = refp->nfr_srvlist;
1788                         for (i = 0; i < refp->nfr_srvcnt; i++) {
1789                                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
1790                                 *tl = txdr_unsigned(1);
1791                                 retnum += NFSX_UNSIGNED;
1792                                 cp2 = STRCHR(cp, ':');
1793                                 if (cp2 != NULL)
1794                                         len = cp2 - cp;
1795                                 else
1796                                         len = 1;
1797                                 retnum += nfsm_strtom(nd, cp, len);
1798                                 if (cp2 != NULL)
1799                                         cp = cp2 + 1;
1800                                 cp2 = STRCHR(cp, ',');
1801                                 if (cp2 != NULL)
1802                                         len = cp2 - cp;
1803                                 else
1804                                         len = strlen(cp);
1805                                 retnum += nfsm_strtom(nd, cp, len);
1806                                 if (cp2 != NULL)
1807                                         cp = cp2 + 1;
1808                         }
1809                         break;
1810                 case NFSATTRBIT_MOUNTEDONFILEID:
1811                         NFSM_BUILD(tl, u_int32_t *, NFSX_HYPER);
1812                         *tl++ = 0;
1813                         *tl = txdr_unsigned(refp->nfr_dfileno);
1814                         retnum += NFSX_HYPER;
1815                         break;
1816                 default:
1817                         printf("EEK! Bad V4 refattr bitpos=%d\n", bitpos);
1818                 };
1819             }
1820         }
1821         *retnump = txdr_unsigned(retnum);
1822         return (retnum + prefixnum);
1823 }
1824
1825 /*
1826  * Parse a file name out of a request.
1827  */
1828 APPLESTATIC int
1829 nfsrv_parsename(struct nfsrv_descript *nd, char *bufp, u_long *hashp,
1830     NFSPATHLEN_T *outlenp)
1831 {
1832         char *fromcp, *tocp, val = '\0';
1833         mbuf_t md;
1834         int i;
1835         int rem, len, error = 0, pubtype = 0, outlen = 0, percent = 0;
1836         char digit;
1837         u_int32_t *tl;
1838         u_long hash = 0;
1839
1840         if (hashp != NULL)
1841                 *hashp = 0;
1842         tocp = bufp;
1843         /*
1844          * For V4, check for lookup parent.
1845          * Otherwise, get the component name.
1846          */
1847         if ((nd->nd_flag & ND_NFSV4) && nd->nd_procnum == NFSV4OP_LOOKUPP) {
1848             *tocp++ = '.';
1849             hash += ((u_char)'.');
1850             *tocp++ = '.';
1851             hash += ((u_char)'.');
1852             outlen = 2;
1853         } else {
1854             /*
1855              * First, get the name length.
1856              */
1857             NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
1858             len = fxdr_unsigned(int, *tl);
1859             if (len > NFS_MAXNAMLEN) {
1860                 nd->nd_repstat = NFSERR_NAMETOL;
1861                 error = 0;
1862                 goto nfsmout;
1863             } else if (len <= 0) {
1864                 nd->nd_repstat = NFSERR_INVAL;
1865                 error = 0;
1866                 goto nfsmout;
1867             }
1868
1869             /*
1870              * Now, copy the component name into the buffer.
1871              */
1872             fromcp = nd->nd_dpos;
1873             md = nd->nd_md;
1874             rem = NFSMTOD(md, caddr_t) + mbuf_len(md) - fromcp;
1875             for (i = 0; i < len; i++) {
1876                 while (rem == 0) {
1877                         md = mbuf_next(md);
1878                         if (md == NULL) {
1879                                 error = EBADRPC;
1880                                 goto nfsmout;
1881                         }
1882                         fromcp = NFSMTOD(md, caddr_t);
1883                         rem = mbuf_len(md);
1884                 }
1885                 if (*fromcp == '\0') {
1886                         nd->nd_repstat = EACCES;
1887                         error = 0;
1888                         goto nfsmout;
1889                 }
1890                 /*
1891                  * For lookups on the public filehandle, do some special
1892                  * processing on the name. (The public file handle is the
1893                  * root of the public file system for this server.)
1894                  */
1895                 if (nd->nd_flag & ND_PUBLOOKUP) {
1896                         /*
1897                          * If the first char is ASCII, it is a canonical
1898                          * path, otherwise it is a native path. (RFC2054
1899                          * doesn't actually state what it is if the first
1900                          * char isn't ASCII or 0x80, so I assume native.)
1901                          * pubtype == 1 -> native path
1902                          * pubtype == 2 -> canonical path
1903                          */
1904                         if (i == 0) {
1905                                 if (*fromcp & 0x80) {
1906                                         /*
1907                                          * Since RFC2054 doesn't indicate
1908                                          * that a native path of just 0x80
1909                                          * isn't allowed, I'll replace the
1910                                          * 0x80 with '/' instead of just
1911                                          * throwing it away.
1912                                          */
1913                                         *fromcp = '/';
1914                                         pubtype = 1;
1915                                 } else {
1916                                         pubtype = 2;
1917                                 }
1918                         }
1919                         /*
1920                          * '/' only allowed in a native path
1921                          */
1922                         if (*fromcp == '/' && pubtype != 1) {
1923                                 nd->nd_repstat = EACCES;
1924                                 error = 0;
1925                                 goto nfsmout;
1926                         }
1927
1928                         /*
1929                          * For the special case of 2 hex digits after a
1930                          * '%' in an absolute path, calculate the value.
1931                          * percent == 1 -> indicates "get first hex digit"
1932                          * percent == 2 -> indicates "get second hex digit"
1933                          */
1934                         if (percent > 0) {
1935                                 digit = nfsrv_hexdigit(*fromcp, &error);
1936                                 if (error) {
1937                                         nd->nd_repstat = EACCES;
1938                                         error = 0;
1939                                         goto nfsmout;
1940                                 }
1941                                 if (percent == 1) {
1942                                         val = (digit << 4);
1943                                         percent = 2;
1944                                 } else {
1945                                         val += digit;
1946                                         percent = 0;
1947                                         *tocp++ = val;
1948                                         hash += ((u_char)val);
1949                                         outlen++;
1950                                 }
1951                         } else {
1952                                 if (*fromcp == '%' && pubtype == 2) {
1953                                         /*
1954                                          * Must be followed by 2 hex digits
1955                                          */
1956                                         if ((len - i) < 3) {
1957                                                 nd->nd_repstat = EACCES;
1958                                                 error = 0;
1959                                                 goto nfsmout;
1960                                         }
1961                                         percent = 1;
1962                                 } else {
1963                                         *tocp++ = *fromcp;
1964                                         hash += ((u_char)*fromcp);
1965                                         outlen++;
1966                                 }
1967                         }
1968                 } else {
1969                         /*
1970                          * Normal, non lookup on public, name.
1971                          */
1972                         if (*fromcp == '/') {
1973                                 if (nd->nd_flag & ND_NFSV4)
1974                                         nd->nd_repstat = NFSERR_BADNAME;
1975                                 else
1976                                         nd->nd_repstat = EACCES;
1977                                 error = 0;
1978                                 goto nfsmout;
1979                         }
1980                         hash += ((u_char)*fromcp);
1981                         *tocp++ = *fromcp;
1982                         outlen++;
1983                 }
1984                 fromcp++;
1985                 rem--;
1986             }
1987             nd->nd_md = md;
1988             nd->nd_dpos = fromcp;
1989             i = NFSM_RNDUP(len) - len;
1990             if (i > 0) {
1991                 if (rem >= i) {
1992                         nd->nd_dpos += i;
1993                 } else {
1994                         error = nfsm_advance(nd, i, rem);
1995                         if (error)
1996                                 goto nfsmout;
1997                 }
1998             }
1999
2000             /*
2001              * For v4, don't allow lookups of '.' or '..' and
2002              * also check for non-utf8 strings.
2003              */
2004             if (nd->nd_flag & ND_NFSV4) {
2005                 if ((outlen == 1 && bufp[0] == '.') ||
2006                     (outlen == 2 && bufp[0] == '.' &&
2007                      bufp[1] == '.')) {
2008                     nd->nd_repstat = NFSERR_BADNAME;
2009                     error = 0;
2010                     goto nfsmout;
2011                 }
2012                 if (disable_checkutf8 == 0 &&
2013                     nfsrv_checkutf8((u_int8_t *)bufp, outlen)) {
2014                     nd->nd_repstat = NFSERR_INVAL;
2015                     error = 0;
2016                     goto nfsmout;
2017                 }
2018             }
2019         }
2020         *tocp = '\0';
2021         *outlenp = (size_t)outlen;
2022         if (hashp != NULL)
2023                 *hashp = hash;
2024 nfsmout:
2025         NFSEXITCODE2(error, nd);
2026         return (error);
2027 }
2028
2029 void
2030 nfsd_init(void)
2031 {
2032         int i;
2033         static int inited = 0;
2034
2035         if (inited)
2036                 return;
2037         inited = 1;
2038
2039         /*
2040          * Initialize client queues. Don't free/reinitialize
2041          * them when nfsds are restarted.
2042          */
2043         nfsclienthash = malloc(sizeof(struct nfsclienthashhead) *
2044             nfsrv_clienthashsize, M_NFSDCLIENT, M_WAITOK | M_ZERO);
2045         for (i = 0; i < nfsrv_clienthashsize; i++)
2046                 LIST_INIT(&nfsclienthash[i]);
2047         nfslockhash = malloc(sizeof(struct nfslockhashhead) *
2048             nfsrv_lockhashsize, M_NFSDLOCKFILE, M_WAITOK | M_ZERO);
2049         for (i = 0; i < nfsrv_lockhashsize; i++)
2050                 LIST_INIT(&nfslockhash[i]);
2051         nfssessionhash = malloc(sizeof(struct nfssessionhash) *
2052             nfsrv_sessionhashsize, M_NFSDSESSION, M_WAITOK | M_ZERO);
2053         for (i = 0; i < nfsrv_sessionhashsize; i++) {
2054                 mtx_init(&nfssessionhash[i].mtx, "nfssm", NULL, MTX_DEF);
2055                 LIST_INIT(&nfssessionhash[i].list);
2056         }
2057
2058         /* and the v2 pubfh should be all zeros */
2059         NFSBZERO(nfs_v2pubfh, NFSX_V2FH);
2060 }
2061
2062 /*
2063  * Check the v4 root exports.
2064  * Return 0 if ok, 1 otherwise.
2065  */
2066 int
2067 nfsd_checkrootexp(struct nfsrv_descript *nd)
2068 {
2069
2070         if ((nd->nd_flag & (ND_GSS | ND_EXAUTHSYS)) == ND_EXAUTHSYS)
2071                 return (0);
2072         if ((nd->nd_flag & (ND_GSSINTEGRITY | ND_EXGSSINTEGRITY)) ==
2073             (ND_GSSINTEGRITY | ND_EXGSSINTEGRITY))
2074                 return (0);
2075         if ((nd->nd_flag & (ND_GSSPRIVACY | ND_EXGSSPRIVACY)) ==
2076             (ND_GSSPRIVACY | ND_EXGSSPRIVACY))
2077                 return (0);
2078         if ((nd->nd_flag & (ND_GSS | ND_GSSINTEGRITY | ND_GSSPRIVACY |
2079              ND_EXGSS)) == (ND_GSS | ND_EXGSS))
2080                 return (0);
2081         return (1);
2082 }
2083
2084 /*
2085  * Parse the first part of an NFSv4 compound to find out what the minor
2086  * version# is.
2087  */
2088 void
2089 nfsd_getminorvers(struct nfsrv_descript *nd, u_char *tag, u_char **tagstrp,
2090     int *taglenp, u_int32_t *minversp)
2091 {
2092         uint32_t *tl;
2093         int error = 0, taglen = -1;
2094         u_char *tagstr = NULL;
2095
2096         NFSM_DISSECT(tl, uint32_t *, NFSX_UNSIGNED);
2097         taglen = fxdr_unsigned(int, *tl);
2098         if (taglen < 0 || taglen > NFSV4_OPAQUELIMIT) {
2099                 error = EBADRPC;
2100                 goto nfsmout;
2101         }
2102         if (taglen <= NFSV4_SMALLSTR)
2103                 tagstr = tag;
2104         else
2105                 tagstr = malloc(taglen + 1, M_TEMP, M_WAITOK);
2106         error = nfsrv_mtostr(nd, tagstr, taglen);
2107         if (error != 0)
2108                 goto nfsmout;
2109         NFSM_DISSECT(tl, uint32_t *, NFSX_UNSIGNED);
2110         *minversp = fxdr_unsigned(u_int32_t, *tl);
2111         *tagstrp = tagstr;
2112         if (*minversp == NFSV41_MINORVERSION)
2113                 nd->nd_flag |= ND_NFSV41;
2114 nfsmout:
2115         if (error != 0) {
2116                 if (tagstr != NULL && taglen > NFSV4_SMALLSTR)
2117                         free(tagstr, M_TEMP);
2118                 taglen = -1;
2119         }
2120         *taglenp = taglen;
2121 }
2122