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 __be32
  34 nfsd_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
  35 {
  36         return nfs_ok;
  37 }
  38
  39 static __be32
  40 nfsd_return_attrs(__be32 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 __be32
  48 nfsd_return_dirop(__be32 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 __be32
  60 nfsd_proc_getattr(struct svc_rqst *rqstp, struct nfsd_fhandle  *argp,
  61                                           struct nfsd_attrstat *resp)
  62 {
  63         __be32 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 __be32
  76 nfsd_proc_setattr(struct svc_rqst *rqstp, struct nfsd_sattrargs *argp,
  77                                           struct nfsd_attrstat  *resp)
  78 {
  79         __be32 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 __be32
  96 nfsd_proc_lookup(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
  97                                          struct nfsd_diropres  *resp)
  98 {
  99         __be32  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 __be32
 116 nfsd_proc_readlink(struct svc_rqst *rqstp, struct nfsd_readlinkargs *argp,
 117                                            struct nfsd_readlinkres *resp)
 118 {
 119         __be32  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 __be32
 136 nfsd_proc_read(struct svc_rqst *rqstp, struct nfsd_readargs *argp,
 137                                        struct nfsd_readres  *resp)
 138 {
 139         __be32  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 __be32
 176 nfsd_proc_write(struct svc_rqst *rqstp, struct nfsd_writeargs *argp,
 177                                         struct nfsd_attrstat  *resp)
 178 {
 179         __be32  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 __be32
 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             type, mode;
 210         __be32          nfserr;
 211         dev_t           rdev = 0, wanted = new_decode_dev(attr->ia_size);
 212
 213         dprintk("nfsd: CREATE   %s %.*s\n",
 214                 SVCFH_fmt(dirfhp), argp->len, argp->name);
 215
 216         /* First verify the parent file handle */
 217         nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, MAY_EXEC);
 218         if (nfserr)
 219                 goto done; /* must fh_put dirfhp even on error */
 220
 221         /* Check for MAY_WRITE in nfsd_create if necessary */
 222
 223         nfserr = nfserr_acces;
 224         if (!argp->len)
 225                 goto done;
 226         nfserr = nfserr_exist;
 227         if (isdotent(argp->name, argp->len))
 228                 goto done;
 229         fh_lock_nested(dirfhp, I_MUTEX_PARENT);
 230         dchild = lookup_one_len(argp->name, dirfhp->fh_dentry, argp->len);
 231         if (IS_ERR(dchild)) {
 232                 nfserr = nfserrno(PTR_ERR(dchild));
 233                 goto out_unlock;
 234         }
 235         fh_init(newfhp, NFS_FHSIZE);
 236         nfserr = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp);
 237         if (!nfserr && !dchild->d_inode)
 238                 nfserr = nfserr_noent;
 239         dput(dchild);
 240         if (nfserr) {
 241                 if (nfserr != nfserr_noent)
 242                         goto out_unlock;
 243                 /*
 244                  * If the new file handle wasn't verified, we can't tell
 245                  * whether the file exists or not. Time to bail ...
 246                  */
 247                 nfserr = nfserr_acces;
 248                 if (!newfhp->fh_dentry) {
 249                         printk(KERN_WARNING
 250                                 "nfsd_proc_create: file handle not verified\n");
 251                         goto out_unlock;
 252                 }
 253         }
 254
 255         inode = newfhp->fh_dentry->d_inode;
 256
 257         /* Unfudge the mode bits */
 258         if (attr->ia_valid & ATTR_MODE) {
 259                 type = attr->ia_mode & S_IFMT;
 260                 mode = attr->ia_mode & ~S_IFMT;
 261                 if (!type) {
 262                         /* no type, so if target exists, assume same as that,
 263                          * else assume a file */
 264                         if (inode) {
 265                                 type = inode->i_mode & S_IFMT;
 266                                 switch(type) {
 267                                 case S_IFCHR:
 268                                 case S_IFBLK:
 269                                         /* reserve rdev for later checking */
 270                                         rdev = inode->i_rdev;
 271                                         attr->ia_valid |= ATTR_SIZE;
 272
 273                                         /* FALLTHROUGH */
 274                                 case S_IFIFO:
 275                                         /* this is probably a permission check..
 276                                          * at least IRIX implements perm checking on
 277                                          *   echo thing > device-special-file-or-pipe
 278                                          * by doing a CREATE with type==0
 279                                          */
 280                                         nfserr = nfsd_permission(newfhp->fh_export,
 281                                                                  newfhp->fh_dentry,
 282                                                                  MAY_WRITE|MAY_LOCAL_ACCESS);
 283                                         if (nfserr && nfserr != nfserr_rofs)
 284                                                 goto out_unlock;
 285                                 }
 286                         } else
 287                                 type = S_IFREG;
 288                 }
 289         } else if (inode) {
 290                 type = inode->i_mode & S_IFMT;
 291                 mode = inode->i_mode & ~S_IFMT;
 292         } else {
 293                 type = S_IFREG;
 294                 mode = 0;       /* ??? */
 295         }
 296
 297         attr->ia_valid |= ATTR_MODE;
 298         attr->ia_mode = mode;
 299
 300         /* Special treatment for non-regular files according to the
 301          * gospel of sun micro
 302          */
 303         if (type != S_IFREG) {
 304                 int     is_borc = 0;
 305                 if (type != S_IFBLK && type != S_IFCHR) {
 306                         rdev = 0;
 307                 } else if (type == S_IFCHR && !(attr->ia_valid & ATTR_SIZE)) {
 308                         /* If you think you've seen the worst, grok this. */
 309                         type = S_IFIFO;
 310                 } else {
 311                         /* Okay, char or block special */
 312                         is_borc = 1;
 313                         if (!rdev)
 314                                 rdev = wanted;
 315                 }
 316
 317                 /* we've used the SIZE information, so discard it */
 318                 attr->ia_valid &= ~ATTR_SIZE;
 319
 320                 /* Make sure the type and device matches */
 321                 nfserr = nfserr_exist;
 322                 if (inode && type != (inode->i_mode & S_IFMT))
 323                         goto out_unlock;
 324         }
 325
 326         nfserr = 0;
 327         if (!inode) {
 328                 /* File doesn't exist. Create it and set attrs */
 329                 nfserr = nfsd_create(rqstp, dirfhp, argp->name, argp->len,
 330                                         attr, type, rdev, newfhp);
 331         } else if (type == S_IFREG) {
 332                 dprintk("nfsd:   existing %s, valid=%x, size=%ld\n",
 333                         argp->name, attr->ia_valid, (long) attr->ia_size);
 334                 /* File already exists. We ignore all attributes except
 335                  * size, so that creat() behaves exactly like
 336                  * open(..., O_CREAT|O_TRUNC|O_WRONLY).
 337                  */
 338                 attr->ia_valid &= ATTR_SIZE;
 339                 if (attr->ia_valid)
 340                         nfserr = nfsd_setattr(rqstp, newfhp, attr, 0, (time_t)0);
 341         }
 342
 343 out_unlock:
 344         /* We don't really need to unlock, as fh_put does it. */
 345         fh_unlock(dirfhp);
 346
 347 done:
 348         fh_put(dirfhp);
 349         return nfsd_return_dirop(nfserr, resp);
 350 }
 351
 352 static __be32
 353 nfsd_proc_remove(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
 354                                          void                  *resp)
 355 {
 356         __be32  nfserr;
 357
 358         dprintk("nfsd: REMOVE   %s %.*s\n", SVCFH_fmt(&argp->fh),
 359                 argp->len, argp->name);
 360
 361         /* Unlink. -SIFDIR means file must not be a directory */
 362         nfserr = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR, argp->name, argp->len);
 363         fh_put(&argp->fh);
 364         return nfserr;
 365 }
 366
 367 static __be32
 368 nfsd_proc_rename(struct svc_rqst *rqstp, struct nfsd_renameargs *argp,
 369                                          void                   *resp)
 370 {
 371         __be32  nfserr;
 372
 373         dprintk("nfsd: RENAME   %s %.*s -> \n",
 374                 SVCFH_fmt(&argp->ffh), argp->flen, argp->fname);
 375         dprintk("nfsd:        ->  %s %.*s\n",
 376                 SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname);
 377
 378         nfserr = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen,
 379                                     &argp->tfh, argp->tname, argp->tlen);
 380         fh_put(&argp->ffh);
 381         fh_put(&argp->tfh);
 382         return nfserr;
 383 }
 384
 385 static __be32
 386 nfsd_proc_link(struct svc_rqst *rqstp, struct nfsd_linkargs *argp,
 387                                 void                        *resp)
 388 {
 389         __be32  nfserr;
 390
 391         dprintk("nfsd: LINK     %s ->\n",
 392                 SVCFH_fmt(&argp->ffh));
 393         dprintk("nfsd:    %s %.*s\n",
 394                 SVCFH_fmt(&argp->tfh),
 395                 argp->tlen,
 396                 argp->tname);
 397
 398         nfserr = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen,
 399                                   &argp->ffh);
 400         fh_put(&argp->ffh);
 401         fh_put(&argp->tfh);
 402         return nfserr;
 403 }
 404
 405 static __be32
 406 nfsd_proc_symlink(struct svc_rqst *rqstp, struct nfsd_symlinkargs *argp,
 407                                           void                    *resp)
 408 {
 409         struct svc_fh   newfh;
 410         __be32          nfserr;
 411
 412         dprintk("nfsd: SYMLINK  %s %.*s -> %.*s\n",
 413                 SVCFH_fmt(&argp->ffh), argp->flen, argp->fname,
 414                 argp->tlen, argp->tname);
 415
 416         fh_init(&newfh, NFS_FHSIZE);
 417         /*
 418          * Create the link, look up new file and set attrs.
 419          */
 420         nfserr = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen,
 421                                                  argp->tname, argp->tlen,
 422                                                  &newfh, &argp->attrs);
 423
 424
 425         fh_put(&argp->ffh);
 426         fh_put(&newfh);
 427         return nfserr;
 428 }
 429
 430 /*
 431  * Make directory. This operation is not idempotent.
 432  * N.B. After this call resp->fh needs an fh_put
 433  */
 434 static __be32
 435 nfsd_proc_mkdir(struct svc_rqst *rqstp, struct nfsd_createargs *argp,
 436                                         struct nfsd_diropres   *resp)
 437 {
 438         __be32  nfserr;
 439
 440         dprintk("nfsd: MKDIR    %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
 441
 442         if (resp->fh.fh_dentry) {
 443                 printk(KERN_WARNING
 444                         "nfsd_proc_mkdir: response already verified??\n");
 445         }
 446
 447         argp->attrs.ia_valid &= ~ATTR_SIZE;
 448         fh_init(&resp->fh, NFS_FHSIZE);
 449         nfserr = nfsd_create(rqstp, &argp->fh, argp->name, argp->len,
 450                                     &argp->attrs, S_IFDIR, 0, &resp->fh);
 451         fh_put(&argp->fh);
 452         return nfsd_return_dirop(nfserr, resp);
 453 }
 454
 455 /*
 456  * Remove a directory
 457  */
 458 static __be32
 459 nfsd_proc_rmdir(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
 460                                         void                  *resp)
 461 {
 462         __be32  nfserr;
 463
 464         dprintk("nfsd: RMDIR    %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
 465
 466         nfserr = nfsd_unlink(rqstp, &argp->fh, S_IFDIR, argp->name, argp->len);
 467         fh_put(&argp->fh);
 468         return nfserr;
 469 }
 470
 471 /*
 472  * Read a portion of a directory.
 473  */
 474 static __be32
 475 nfsd_proc_readdir(struct svc_rqst *rqstp, struct nfsd_readdirargs *argp,
 476                                           struct nfsd_readdirres  *resp)
 477 {
 478         int             count;
 479         __be32          nfserr;
 480         loff_t          offset;
 481
 482         dprintk("nfsd: READDIR  %s %d bytes at %d\n",
 483                 SVCFH_fmt(&argp->fh),
 484                 argp->count, argp->cookie);
 485
 486         /* Shrink to the client read size */
 487         count = (argp->count >> 2) - 2;
 488
 489         /* Make sure we've room for the NULL ptr & eof flag */
 490         count -= 2;
 491         if (count < 0)
 492                 count = 0;
 493
 494         resp->buffer = argp->buffer;
 495         resp->offset = NULL;
 496         resp->buflen = count;
 497         resp->common.err = nfs_ok;
 498         /* Read directory and encode entries on the fly */
 499         offset = argp->cookie;
 500         nfserr = nfsd_readdir(rqstp, &argp->fh, &offset,
 501                               &resp->common, nfssvc_encode_entry);
 502
 503         resp->count = resp->buffer - argp->buffer;
 504         if (resp->offset)
 505                 *resp->offset = htonl(offset);
 506
 507         fh_put(&argp->fh);
 508         return nfserr;
 509 }
 510
 511 /*
 512  * Get file system info
 513  */
 514 static __be32
 515 nfsd_proc_statfs(struct svc_rqst * rqstp, struct nfsd_fhandle   *argp,
 516                                           struct nfsd_statfsres *resp)
 517 {
 518         __be32  nfserr;
 519
 520         dprintk("nfsd: STATFS   %s\n", SVCFH_fmt(&argp->fh));
 521
 522         nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats);
 523         fh_put(&argp->fh);
 524         return nfserr;
 525 }
 526
 527 /*
 528  * NFSv2 Server procedures.
 529  * Only the results of non-idempotent operations are cached.
 530  */
 531 #define nfsd_proc_none          NULL
 532 #define nfssvc_release_none     NULL
 533 struct nfsd_void { int dummy; };
 534
 535 #define PROC(name, argt, rest, relt, cache, respsize)   \
 536  { (svc_procfunc) nfsd_proc_##name,             \
 537    (kxdrproc_t) nfssvc_decode_##argt,           \
 538    (kxdrproc_t) nfssvc_encode_##rest,           \
 539    (kxdrproc_t) nfssvc_release_##relt,          \
 540    sizeof(struct nfsd_##argt),                  \
 541    sizeof(struct nfsd_##rest),                  \
 542    0,                                           \
 543    cache,                                       \
 544    respsize,                                    \
 545  }
 546
 547 #define ST 1            /* status */
 548 #define FH 8            /* filehandle */
 549 #define AT 18           /* attributes */
 550
 551 static struct svc_procedure             nfsd_procedures2[18] = {
 552   PROC(null,     void,          void,           none,           RC_NOCACHE, ST),
 553   PROC(getattr,  fhandle,       attrstat,       fhandle,        RC_NOCACHE, ST+AT),
 554   PROC(setattr,  sattrargs,     attrstat,       fhandle,        RC_REPLBUFF, ST+AT),
 555   PROC(none,     void,          void,           none,           RC_NOCACHE, ST),
 556   PROC(lookup,   diropargs,     diropres,       fhandle,        RC_NOCACHE, ST+FH+AT),
 557   PROC(readlink, readlinkargs,  readlinkres,    none,           RC_NOCACHE, ST+1+NFS_MAXPATHLEN/4),
 558   PROC(read,     readargs,      readres,        fhandle,        RC_NOCACHE, ST+AT+1+NFSSVC_MAXBLKSIZE_V2/4),
 559   PROC(none,     void,          void,           none,           RC_NOCACHE, ST),
 560   PROC(write,    writeargs,     attrstat,       fhandle,        RC_REPLBUFF, ST+AT),
 561   PROC(create,   createargs,    diropres,       fhandle,        RC_REPLBUFF, ST+FH+AT),
 562   PROC(remove,   diropargs,     void,           none,           RC_REPLSTAT, ST),
 563   PROC(rename,   renameargs,    void,           none,           RC_REPLSTAT, ST),
 564   PROC(link,     linkargs,      void,           none,           RC_REPLSTAT, ST),
 565   PROC(symlink,  symlinkargs,   void,           none,           RC_REPLSTAT, ST),
 566   PROC(mkdir,    createargs,    diropres,       fhandle,        RC_REPLBUFF, ST+FH+AT),
 567   PROC(rmdir,    diropargs,     void,           none,           RC_REPLSTAT, ST),
 568   PROC(readdir,  readdirargs,   readdirres,     none,           RC_NOCACHE, 0),
 569   PROC(statfs,   fhandle,       statfsres,      none,           RC_NOCACHE, ST+5),
 570 };
 571
 572
 573 struct svc_version      nfsd_version2 = {
 574                 .vs_vers        = 2,
 575                 .vs_nproc       = 18,
 576                 .vs_proc        = nfsd_procedures2,
 577                 .vs_dispatch    = nfsd_dispatch,
 578                 .vs_xdrsize     = NFS2_SVC_XDRSIZE,
 579 };
 580
 581 /*
 582  * Map errnos to NFS errnos.
 583  */
 584 __be32
 585 nfserrno (int errno)
 586 {
 587         static struct {
 588                 __be32  nfserr;
 589                 int     syserr;
 590         } nfs_errtbl[] = {
 591                 { nfs_ok, 0 },
 592                 { nfserr_perm, -EPERM },
 593                 { nfserr_noent, -ENOENT },
 594                 { nfserr_io, -EIO },
 595                 { nfserr_nxio, -ENXIO },
 596                 { nfserr_acces, -EACCES },
 597                 { nfserr_exist, -EEXIST },
 598                 { nfserr_xdev, -EXDEV },
 599                 { nfserr_mlink, -EMLINK },
 600                 { nfserr_nodev, -ENODEV },
 601                 { nfserr_notdir, -ENOTDIR },
 602                 { nfserr_isdir, -EISDIR },
 603                 { nfserr_inval, -EINVAL },
 604                 { nfserr_fbig, -EFBIG },
 605                 { nfserr_nospc, -ENOSPC },
 606                 { nfserr_rofs, -EROFS },
 607                 { nfserr_mlink, -EMLINK },
 608                 { nfserr_nametoolong, -ENAMETOOLONG },
 609                 { nfserr_notempty, -ENOTEMPTY },
 610 #ifdef EDQUOT
 611                 { nfserr_dquot, -EDQUOT },
 612 #endif
 613                 { nfserr_stale, -ESTALE },
 614                 { nfserr_jukebox, -ETIMEDOUT },
 615                 { nfserr_dropit, -EAGAIN },
 616                 { nfserr_dropit, -ENOMEM },
 617                 { nfserr_badname, -ESRCH },
 618                 { nfserr_io, -ETXTBSY },
 619                 { nfserr_notsupp, -EOPNOTSUPP },
 620         };
 621         int     i;
 622
 623         for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) {
 624                 if (nfs_errtbl[i].syserr == errno)
 625                         return nfs_errtbl[i].nfserr;
 626         }
 627         printk (KERN_INFO "nfsd: non-standard errno: %d\n", errno);
 628         return nfserr_io;
 629 }
 630