fs/nfsd/nfsproc.c

   1 /*
   2  * nfsproc2.c   Process version 2 NFS requests.
   3  * linux/fs/nfsd/nfs2proc.c
   4  *
   5  * Process version 2 NFS requests.
   6  *
   7  * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
   8  */
   9
  10 #include <linux/linkage.h>
  11 #include <linux/time.h>
  12 #include <linux/errno.h>
  13 #include <linux/fs.h>
  14 #include <linux/stat.h>
  15 #include <linux/fcntl.h>
  16 #include <linux/net.h>
  17 #include <linux/in.h>
  18 #include <linux/namei.h>
  19 #include <linux/unistd.h>
  20 #include <linux/slab.h>
  21
  22 #include <linux/sunrpc/svc.h>
  23 #include <linux/nfsd/nfsd.h>
  24 #include <linux/nfsd/cache.h>
  25 #include <linux/nfsd/xdr.h>
  26
  27 typedef struct svc_rqst svc_rqst;
  28 typedef struct svc_buf  svc_buf;
  29
  30 #define NFSDDBG_FACILITY                NFSDDBG_PROC
  31
  32
  33 static int
  34 nfsd_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
  35 {
  36         return nfs_ok;
  37 }
  38
  39 static int
  40 nfsd_return_attrs(int err, struct nfsd_attrstat *resp)
  41 {
  42         if (err) return err;
  43         return nfserrno(vfs_getattr(resp->fh.fh_export->ex_mnt,
  44                                     resp->fh.fh_dentry,
  45                                     &resp->stat));
  46 }
  47 static int
  48 nfsd_return_dirop(int err, struct nfsd_diropres *resp)
  49 {
  50         if (err) return err;
  51         return nfserrno(vfs_getattr(resp->fh.fh_export->ex_mnt,
  52                                     resp->fh.fh_dentry,
  53                                     &resp->stat));
  54 }
  55 /*
  56  * Get a file's attributes
  57  * N.B. After this call resp->fh needs an fh_put
  58  */
  59 static int
  60 nfsd_proc_getattr(struct svc_rqst *rqstp, struct nfsd_fhandle  *argp,
  61                                           struct nfsd_attrstat *resp)
  62 {
  63         int nfserr;
  64         dprintk("nfsd: GETATTR  %s\n", SVCFH_fmt(&argp->fh));
  65
  66         fh_copy(&resp->fh, &argp->fh);
  67         nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_NOP);
  68         return nfsd_return_attrs(nfserr, resp);
  69 }
  70
  71 /*
  72  * Set a file's attributes
  73  * N.B. After this call resp->fh needs an fh_put
  74  */
  75 static int
  76 nfsd_proc_setattr(struct svc_rqst *rqstp, struct nfsd_sattrargs *argp,
  77                                           struct nfsd_attrstat  *resp)
  78 {
  79         int nfserr;
  80         dprintk("nfsd: SETATTR  %s, valid=%x, size=%ld\n",
  81                 SVCFH_fmt(&argp->fh),
  82                 argp->attrs.ia_valid, (long) argp->attrs.ia_size);
  83
  84         fh_copy(&resp->fh, &argp->fh);
  85         nfserr = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,0, (time_t)0);
  86         return nfsd_return_attrs(nfserr, resp);
  87 }
  88
  89 /*
  90  * Look up a path name component
  91  * Note: the dentry in the resp->fh may be negative if the file
  92  * doesn't exist yet.
  93  * N.B. After this call resp->fh needs an fh_put
  94  */
  95 static int
  96 nfsd_proc_lookup(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
  97                                          struct nfsd_diropres  *resp)
  98 {
  99         int     nfserr;
 100
 101         dprintk("nfsd: LOOKUP   %s %.*s\n",
 102                 SVCFH_fmt(&argp->fh), argp->len, argp->name);
 103
 104         fh_init(&resp->fh, NFS_FHSIZE);
 105         nfserr = nfsd_lookup(rqstp, &argp->fh, argp->name, argp->len,
 106                                  &resp->fh);
 107
 108         fh_put(&argp->fh);
 109         return nfsd_return_dirop(nfserr, resp);
 110 }
 111
 112 /*
 113  * Read a symlink.
 114  */
 115 static int
 116 nfsd_proc_readlink(struct svc_rqst *rqstp, struct nfsd_readlinkargs *argp,
 117                                            struct nfsd_readlinkres *resp)
 118 {
 119         int     nfserr;
 120
 121         dprintk("nfsd: READLINK %s\n", SVCFH_fmt(&argp->fh));
 122
 123         /* Read the symlink. */
 124         resp->len = NFS_MAXPATHLEN;
 125         nfserr = nfsd_readlink(rqstp, &argp->fh, argp->buffer, &resp->len);
 126
 127         fh_put(&argp->fh);
 128         return nfserr;
 129 }
 130
 131 /*
 132  * Read a portion of a file.
 133  * N.B. After this call resp->fh needs an fh_put
 134  */
 135 static int
 136 nfsd_proc_read(struct svc_rqst *rqstp, struct nfsd_readargs *argp,
 137                                        struct nfsd_readres  *resp)
 138 {
 139         int     nfserr;
 140
 141         dprintk("nfsd: READ    %s %d bytes at %d\n",
 142                 SVCFH_fmt(&argp->fh),
 143                 argp->count, argp->offset);
 144
 145         /* Obtain buffer pointer for payload. 19 is 1 word for
 146          * status, 17 words for fattr, and 1 word for the byte count.
 147          */
 148
 149         if (NFSSVC_MAXBLKSIZE_V2 < argp->count) {
 150                 printk(KERN_NOTICE
 151                         "oversized read request from %u.%u.%u.%u:%d (%d bytes)\n",
 152                                 NIPQUAD(rqstp->rq_addr.sin_addr.s_addr),
 153                                 ntohs(rqstp->rq_addr.sin_port),
 154                                 argp->count);
 155                 argp->count = NFSSVC_MAXBLKSIZE_V2;
 156         }
 157         svc_reserve(rqstp, (19<<2) + argp->count + 4);
 158
 159         resp->count = argp->count;
 160         nfserr = nfsd_read(rqstp, fh_copy(&resp->fh, &argp->fh), NULL,
 161                                   argp->offset,
 162                                   rqstp->rq_vec, argp->vlen,
 163                                   &resp->count);
 164
 165         if (nfserr) return nfserr;
 166         return nfserrno(vfs_getattr(resp->fh.fh_export->ex_mnt,
 167                                     resp->fh.fh_dentry,
 168                                     &resp->stat));
 169 }
 170
 171 /*
 172  * Write data to a file
 173  * N.B. After this call resp->fh needs an fh_put
 174  */
 175 static int
 176 nfsd_proc_write(struct svc_rqst *rqstp, struct nfsd_writeargs *argp,
 177                                         struct nfsd_attrstat  *resp)
 178 {
 179         int     nfserr;
 180         int     stable = 1;
 181
 182         dprintk("nfsd: WRITE    %s %d bytes at %d\n",
 183                 SVCFH_fmt(&argp->fh),
 184                 argp->len, argp->offset);
 185
 186         nfserr = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh), NULL,
 187                                    argp->offset,
 188                                    rqstp->rq_vec, argp->vlen,
 189                                    argp->len,
 190                                    &stable);
 191         return nfsd_return_attrs(nfserr, resp);
 192 }
 193
 194 /*
 195  * CREATE processing is complicated. The keyword here is `overloaded.'
 196  * The parent directory is kept locked between the check for existence
 197  * and the actual create() call in compliance with VFS protocols.
 198  * N.B. After this call _both_ argp->fh and resp->fh need an fh_put
 199  */
 200 static int
 201 nfsd_proc_create(struct svc_rqst *rqstp, struct nfsd_createargs *argp,
 202                                          struct nfsd_diropres   *resp)
 203 {
 204         svc_fh          *dirfhp = &argp->fh;
 205         svc_fh          *newfhp = &resp->fh;
 206         struct iattr    *attr = &argp->attrs;
 207         struct inode    *inode;
 208         struct dentry   *dchild;
 209         int             nfserr, type, mode;
 210         dev_t           rdev = 0, wanted = new_decode_dev(attr->ia_size);
 211
 212         dprintk("nfsd: CREATE   %s %.*s\n",
 213                 SVCFH_fmt(dirfhp), argp->len, argp->name);
 214
 215         /* First verify the parent file handle */
 216         nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, MAY_EXEC);
 217         if (nfserr)
 218                 goto done; /* must fh_put dirfhp even on error */
 219
 220         /* Check for MAY_WRITE in nfsd_create if necessary */
 221
 222         nfserr = nfserr_acces;
 223         if (!argp->len)
 224                 goto done;
 225         nfserr = nfserr_exist;
 226         if (isdotent(argp->name, argp->len))
 227                 goto done;
 228         fh_lock_nested(dirfhp, I_MUTEX_PARENT);
 229         dchild = lookup_one_len(argp->name, dirfhp->fh_dentry, argp->len);
 230         if (IS_ERR(dchild)) {
 231                 nfserr = nfserrno(PTR_ERR(dchild));
 232                 goto out_unlock;
 233         }
 234         fh_init(newfhp, NFS_FHSIZE);
 235         nfserr = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp);
 236         if (!nfserr && !dchild->d_inode)
 237                 nfserr = nfserr_noent;
 238         dput(dchild);
 239         if (nfserr) {
 240                 if (nfserr != nfserr_noent)
 241                         goto out_unlock;
 242                 /*
 243                  * If the new file handle wasn't verified, we can't tell
 244                  * whether the file exists or not. Time to bail ...
 245                  */
 246                 nfserr = nfserr_acces;
 247                 if (!newfhp->fh_dentry) {
 248                         printk(KERN_WARNING
 249                                 "nfsd_proc_create: file handle not verified\n");
 250                         goto out_unlock;
 251                 }
 252         }
 253
 254         inode = newfhp->fh_dentry->d_inode;
 255
 256         /* Unfudge the mode bits */
 257         if (attr->ia_valid & ATTR_MODE) {
 258                 type = attr->ia_mode & S_IFMT;
 259                 mode = attr->ia_mode & ~S_IFMT;
 260                 if (!type) {
 261                         /* no type, so if target exists, assume same as that,
 262                          * else assume a file */
 263                         if (inode) {
 264                                 type = inode->i_mode & S_IFMT;
 265                                 switch(type) {
 266                                 case S_IFCHR:
 267                                 case S_IFBLK:
 268                                         /* reserve rdev for later checking */
 269                                         rdev = inode->i_rdev;
 270                                         attr->ia_valid |= ATTR_SIZE;
 271
 272                                         /* FALLTHROUGH */
 273                                 case S_IFIFO:
 274                                         /* this is probably a permission check..
 275                                          * at least IRIX implements perm checking on
 276                                          *   echo thing > device-special-file-or-pipe
 277                                          * by doing a CREATE with type==0
 278                                          */
 279                                         nfserr = nfsd_permission(newfhp->fh_export,
 280                                                                  newfhp->fh_dentry,
 281                                                                  MAY_WRITE|MAY_LOCAL_ACCESS);
 282                                         if (nfserr && nfserr != nfserr_rofs)
 283                                                 goto out_unlock;
 284                                 }
 285                         } else
 286                                 type = S_IFREG;
 287                 }
 288         } else if (inode) {
 289                 type = inode->i_mode & S_IFMT;
 290                 mode = inode->i_mode & ~S_IFMT;
 291         } else {
 292                 type = S_IFREG;
 293                 mode = 0;       /* ??? */
 294         }
 295
 296         attr->ia_valid |= ATTR_MODE;
 297         attr->ia_mode = mode;
 298
 299         /* Special treatment for non-regular files according to the
 300          * gospel of sun micro
 301          */
 302         if (type != S_IFREG) {
 303                 int     is_borc = 0;
 304                 if (type != S_IFBLK && type != S_IFCHR) {
 305                         rdev = 0;
 306                 } else if (type == S_IFCHR && !(attr->ia_valid & ATTR_SIZE)) {
 307                         /* If you think you've seen the worst, grok this. */
 308                         type = S_IFIFO;
 309                 } else {
 310                         /* Okay, char or block special */
 311                         is_borc = 1;
 312                         if (!rdev)
 313                                 rdev = wanted;
 314                 }
 315
 316                 /* we've used the SIZE information, so discard it */
 317                 attr->ia_valid &= ~ATTR_SIZE;
 318
 319                 /* Make sure the type and device matches */
 320                 nfserr = nfserr_exist;
 321                 if (inode && type != (inode->i_mode & S_IFMT))
 322                         goto out_unlock;
 323         }
 324
 325         nfserr = 0;
 326         if (!inode) {
 327                 /* File doesn't exist. Create it and set attrs */
 328                 nfserr = nfsd_create(rqstp, dirfhp, argp->name, argp->len,
 329                                         attr, type, rdev, newfhp);
 330         } else if (type == S_IFREG) {
 331                 dprintk("nfsd:   existing %s, valid=%x, size=%ld\n",
 332                         argp->name, attr->ia_valid, (long) attr->ia_size);
 333                 /* File already exists. We ignore all attributes except
 334                  * size, so that creat() behaves exactly like
 335                  * open(..., O_CREAT|O_TRUNC|O_WRONLY).
 336                  */
 337                 attr->ia_valid &= ATTR_SIZE;
 338                 if (attr->ia_valid)
 339                         nfserr = nfsd_setattr(rqstp, newfhp, attr, 0, (time_t)0);
 340         }
 341
 342 out_unlock:
 343         /* We don't really need to unlock, as fh_put does it. */
 344         fh_unlock(dirfhp);
 345
 346 done:
 347         fh_put(dirfhp);
 348         return nfsd_return_dirop(nfserr, resp);
 349 }
 350
 351 static int
 352 nfsd_proc_remove(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
 353                                          void                  *resp)
 354 {
 355         int     nfserr;
 356
 357         dprintk("nfsd: REMOVE   %s %.*s\n", SVCFH_fmt(&argp->fh),
 358                 argp->len, argp->name);
 359
 360         /* Unlink. -SIFDIR means file must not be a directory */
 361         nfserr = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR, argp->name, argp->len);
 362         fh_put(&argp->fh);
 363         return nfserr;
 364 }
 365
 366 static int
 367 nfsd_proc_rename(struct svc_rqst *rqstp, struct nfsd_renameargs *argp,
 368                                          void                   *resp)
 369 {
 370         int     nfserr;
 371
 372         dprintk("nfsd: RENAME   %s %.*s -> \n",
 373                 SVCFH_fmt(&argp->ffh), argp->flen, argp->fname);
 374         dprintk("nfsd:        ->  %s %.*s\n",
 375                 SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname);
 376
 377         nfserr = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen,
 378                                     &argp->tfh, argp->tname, argp->tlen);
 379         fh_put(&argp->ffh);
 380         fh_put(&argp->tfh);
 381         return nfserr;
 382 }
 383
 384 static int
 385 nfsd_proc_link(struct svc_rqst *rqstp, struct nfsd_linkargs *argp,
 386                                 void                        *resp)
 387 {
 388         int     nfserr;
 389
 390         dprintk("nfsd: LINK     %s ->\n",
 391                 SVCFH_fmt(&argp->ffh));
 392         dprintk("nfsd:    %s %.*s\n",
 393                 SVCFH_fmt(&argp->tfh),
 394                 argp->tlen,
 395                 argp->tname);
 396
 397         nfserr = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen,
 398                                   &argp->ffh);
 399         fh_put(&argp->ffh);
 400         fh_put(&argp->tfh);
 401         return nfserr;
 402 }
 403
 404 static int
 405 nfsd_proc_symlink(struct svc_rqst *rqstp, struct nfsd_symlinkargs *argp,
 406                                           void                    *resp)
 407 {
 408         struct svc_fh   newfh;
 409         int             nfserr;
 410
 411         dprintk("nfsd: SYMLINK  %s %.*s -> %.*s\n",
 412                 SVCFH_fmt(&argp->ffh), argp->flen, argp->fname,
 413                 argp->tlen, argp->tname);
 414
 415         fh_init(&newfh, NFS_FHSIZE);
 416         /*
 417          * Create the link, look up new file and set attrs.
 418          */
 419         nfserr = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen,
 420                                                  argp->tname, argp->tlen,
 421                                                  &newfh, &argp->attrs);
 422
 423
 424         fh_put(&argp->ffh);
 425         fh_put(&newfh);
 426         return nfserr;
 427 }
 428
 429 /*
 430  * Make directory. This operation is not idempotent.
 431  * N.B. After this call resp->fh needs an fh_put
 432  */
 433 static int
 434 nfsd_proc_mkdir(struct svc_rqst *rqstp, struct nfsd_createargs *argp,
 435                                         struct nfsd_diropres   *resp)
 436 {
 437         int     nfserr;
 438
 439         dprintk("nfsd: MKDIR    %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
 440
 441         if (resp->fh.fh_dentry) {
 442                 printk(KERN_WARNING
 443                         "nfsd_proc_mkdir: response already verified??\n");
 444         }
 445
 446         argp->attrs.ia_valid &= ~ATTR_SIZE;
 447         fh_init(&resp->fh, NFS_FHSIZE);
 448         nfserr = nfsd_create(rqstp, &argp->fh, argp->name, argp->len,
 449                                     &argp->attrs, S_IFDIR, 0, &resp->fh);
 450         fh_put(&argp->fh);
 451         return nfsd_return_dirop(nfserr, resp);
 452 }
 453
 454 /*
 455  * Remove a directory
 456  */
 457 static int
 458 nfsd_proc_rmdir(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
 459                                         void                  *resp)
 460 {
 461         int     nfserr;
 462
 463         dprintk("nfsd: RMDIR    %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
 464
 465         nfserr = nfsd_unlink(rqstp, &argp->fh, S_IFDIR, argp->name, argp->len);
 466         fh_put(&argp->fh);
 467         return nfserr;
 468 }
 469
 470 /*
 471  * Read a portion of a directory.
 472  */
 473 static int
 474 nfsd_proc_readdir(struct svc_rqst *rqstp, struct nfsd_readdirargs *argp,
 475                                           struct nfsd_readdirres  *resp)
 476 {
 477         int             nfserr, count;
 478         loff_t          offset;
 479
 480         dprintk("nfsd: READDIR  %s %d bytes at %d\n",
 481                 SVCFH_fmt(&argp->fh),
 482                 argp->count, argp->cookie);
 483
 484         /* Shrink to the client read size */
 485         count = (argp->count >> 2) - 2;
 486
 487         /* Make sure we've room for the NULL ptr & eof flag */
 488         count -= 2;
 489         if (count < 0)
 490                 count = 0;
 491
 492         resp->buffer = argp->buffer;
 493         resp->offset = NULL;
 494         resp->buflen = count;
 495         resp->common.err = nfs_ok;
 496         /* Read directory and encode entries on the fly */
 497         offset = argp->cookie;
 498         nfserr = nfsd_readdir(rqstp, &argp->fh, &offset,
 499                               &resp->common, nfssvc_encode_entry);
 500
 501         resp->count = resp->buffer - argp->buffer;
 502         if (resp->offset)
 503                 *resp->offset = htonl(offset);
 504
 505         fh_put(&argp->fh);
 506         return nfserr;
 507 }
 508
 509 /*
 510  * Get file system info
 511  */
 512 static int
 513 nfsd_proc_statfs(struct svc_rqst * rqstp, struct nfsd_fhandle   *argp,
 514                                           struct nfsd_statfsres *resp)
 515 {
 516         int     nfserr;
 517
 518         dprintk("nfsd: STATFS   %s\n", SVCFH_fmt(&argp->fh));
 519
 520         nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats);
 521         fh_put(&argp->fh);
 522         return nfserr;
 523 }
 524
 525 /*
 526  * NFSv2 Server procedures.
 527  * Only the results of non-idempotent operations are cached.
 528  */
 529 #define nfsd_proc_none          NULL
 530 #define nfssvc_release_none     NULL
 531 struct nfsd_void { int dummy; };
 532
 533 #define PROC(name, argt, rest, relt, cache, respsize)   \
 534  { (svc_procfunc) nfsd_proc_##name,             \
 535    (kxdrproc_t) nfssvc_decode_##argt,           \
 536    (kxdrproc_t) nfssvc_encode_##rest,           \
 537    (kxdrproc_t) nfssvc_release_##relt,          \
 538    sizeof(struct nfsd_##argt),                  \
 539    sizeof(struct nfsd_##rest),                  \
 540    0,                                           \
 541    cache,                                       \
 542    respsize,                                    \
 543  }
 544
 545 #define ST 1            /* status */
 546 #define FH 8            /* filehandle */
 547 #define AT 18           /* attributes */
 548
 549 static struct svc_procedure             nfsd_procedures2[18] = {
 550   PROC(null,     void,          void,           none,           RC_NOCACHE, ST),
 551   PROC(getattr,  fhandle,       attrstat,       fhandle,        RC_NOCACHE, ST+AT),
 552   PROC(setattr,  sattrargs,     attrstat,       fhandle,        RC_REPLBUFF, ST+AT),
 553   PROC(none,     void,          void,           none,           RC_NOCACHE, ST),
 554   PROC(lookup,   diropargs,     diropres,       fhandle,        RC_NOCACHE, ST+FH+AT),
 555   PROC(readlink, readlinkargs,  readlinkres,    none,           RC_NOCACHE, ST+1+NFS_MAXPATHLEN/4),
 556   PROC(read,     readargs,      readres,        fhandle,        RC_NOCACHE, ST+AT+1+NFSSVC_MAXBLKSIZE_V2/4),
 557   PROC(none,     void,          void,           none,           RC_NOCACHE, ST),
 558   PROC(write,    writeargs,     attrstat,       fhandle,        RC_REPLBUFF, ST+AT),
 559   PROC(create,   createargs,    diropres,       fhandle,        RC_REPLBUFF, ST+FH+AT),
 560   PROC(remove,   diropargs,     void,           none,           RC_REPLSTAT, ST),
 561   PROC(rename,   renameargs,    void,           none,           RC_REPLSTAT, ST),
 562   PROC(link,     linkargs,      void,           none,           RC_REPLSTAT, ST),
 563   PROC(symlink,  symlinkargs,   void,           none,           RC_REPLSTAT, ST),
 564   PROC(mkdir,    createargs,    diropres,       fhandle,        RC_REPLBUFF, ST+FH+AT),
 565   PROC(rmdir,    diropargs,     void,           none,           RC_REPLSTAT, ST),
 566   PROC(readdir,  readdirargs,   readdirres,     none,           RC_NOCACHE, 0),
 567   PROC(statfs,   fhandle,       statfsres,      none,           RC_NOCACHE, ST+5),
 568 };
 569
 570
 571 struct svc_version      nfsd_version2 = {
 572                 .vs_vers        = 2,
 573                 .vs_nproc       = 18,
 574                 .vs_proc        = nfsd_procedures2,
 575                 .vs_dispatch    = nfsd_dispatch,
 576                 .vs_xdrsize     = NFS2_SVC_XDRSIZE,
 577 };
 578
 579 /*
 580  * Map errnos to NFS errnos.
 581  */
 582 int
 583 nfserrno (int errno)
 584 {
 585         static struct {
 586                 int     nfserr;
 587                 int     syserr;
 588         } nfs_errtbl[] = {
 589                 { nfs_ok, 0 },
 590                 { nfserr_perm, -EPERM },
 591                 { nfserr_noent, -ENOENT },
 592                 { nfserr_io, -EIO },
 593                 { nfserr_nxio, -ENXIO },
 594                 { nfserr_acces, -EACCES },
 595                 { nfserr_exist, -EEXIST },
 596                 { nfserr_xdev, -EXDEV },
 597                 { nfserr_mlink, -EMLINK },
 598                 { nfserr_nodev, -ENODEV },
 599                 { nfserr_notdir, -ENOTDIR },
 600                 { nfserr_isdir, -EISDIR },
 601                 { nfserr_inval, -EINVAL },
 602                 { nfserr_fbig, -EFBIG },
 603                 { nfserr_nospc, -ENOSPC },
 604                 { nfserr_rofs, -EROFS },
 605                 { nfserr_mlink, -EMLINK },
 606                 { nfserr_nametoolong, -ENAMETOOLONG },
 607                 { nfserr_notempty, -ENOTEMPTY },
 608 #ifdef EDQUOT
 609                 { nfserr_dquot, -EDQUOT },
 610 #endif
 611                 { nfserr_stale, -ESTALE },
 612                 { nfserr_jukebox, -ETIMEDOUT },
 613                 { nfserr_dropit, -EAGAIN },
 614                 { nfserr_dropit, -ENOMEM },
 615                 { nfserr_badname, -ESRCH },
 616                 { nfserr_io, -ETXTBSY },
 617                 { nfserr_notsupp, -EOPNOTSUPP },
 618                 { -1, -EIO }
 619         };
 620         int     i;
 621
 622         for (i = 0; nfs_errtbl[i].nfserr != -1; i++) {
 623                 if (nfs_errtbl[i].syserr == errno)
 624                         return nfs_errtbl[i].nfserr;
 625         }
 626         printk (KERN_INFO "nfsd: non-standard errno: %d\n", errno);
 627         return nfserr_io;
 628 }
 629