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   1 /*
   2  * linux/fs/nfsd/nfsctl.c
   3  *
   4  * Syscall interface to knfsd.
   5  *
   6  * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
   7  */
   8
   9 #include <linux/module.h>
  10
  11 #include <linux/linkage.h>
  12 #include <linux/time.h>
  13 #include <linux/errno.h>
  14 #include <linux/fs.h>
  15 #include <linux/fcntl.h>
  16 #include <linux/net.h>
  17 #include <linux/in.h>
  18 #include <linux/syscalls.h>
  19 #include <linux/unistd.h>
  20 #include <linux/slab.h>
  21 #include <linux/proc_fs.h>
  22 #include <linux/seq_file.h>
  23 #include <linux/pagemap.h>
  24 #include <linux/init.h>
  25 #include <linux/string.h>
  26 #include <linux/smp_lock.h>
  27 #include <linux/ctype.h>
  28
  29 #include <linux/nfs.h>
  30 #include <linux/nfsd_idmap.h>
  31 #include <linux/lockd/bind.h>
  32 #include <linux/sunrpc/svc.h>
  33 #include <linux/sunrpc/svcsock.h>
  34 #include <linux/nfsd/nfsd.h>
  35 #include <linux/nfsd/cache.h>
  36 #include <linux/nfsd/xdr.h>
  37 #include <linux/nfsd/syscall.h>
  38 #include <linux/nfsd/interface.h>
  39
  40 #include <asm/uaccess.h>
  41
  42 /*
  43  *      We have a single directory with 9 nodes in it.
  44  */
  45 enum {
  46         NFSD_Root = 1,
  47         NFSD_Svc,
  48         NFSD_Add,
  49         NFSD_Del,
  50         NFSD_Export,
  51         NFSD_Unexport,
  52         NFSD_Getfd,
  53         NFSD_Getfs,
  54         NFSD_List,
  55         NFSD_Fh,
  56         NFSD_Threads,
  57         NFSD_Pool_Threads,
  58         NFSD_Versions,
  59         NFSD_Ports,
  60         /*
  61          * The below MUST come last.  Otherwise we leave a hole in nfsd_files[]
  62          * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops
  63          */
  64 #ifdef CONFIG_NFSD_V4
  65         NFSD_Leasetime,
  66         NFSD_RecoveryDir,
  67 #endif
  68 };
  69
  70 /*
  71  * write() for these nodes.
  72  */
  73 static ssize_t write_svc(struct file *file, char *buf, size_t size);
  74 static ssize_t write_add(struct file *file, char *buf, size_t size);
  75 static ssize_t write_del(struct file *file, char *buf, size_t size);
  76 static ssize_t write_export(struct file *file, char *buf, size_t size);
  77 static ssize_t write_unexport(struct file *file, char *buf, size_t size);
  78 static ssize_t write_getfd(struct file *file, char *buf, size_t size);
  79 static ssize_t write_getfs(struct file *file, char *buf, size_t size);
  80 static ssize_t write_filehandle(struct file *file, char *buf, size_t size);
  81 static ssize_t write_threads(struct file *file, char *buf, size_t size);
  82 static ssize_t write_pool_threads(struct file *file, char *buf, size_t size);
  83 static ssize_t write_versions(struct file *file, char *buf, size_t size);
  84 static ssize_t write_ports(struct file *file, char *buf, size_t size);
  85 #ifdef CONFIG_NFSD_V4
  86 static ssize_t write_leasetime(struct file *file, char *buf, size_t size);
  87 static ssize_t write_recoverydir(struct file *file, char *buf, size_t size);
  88 #endif
  89
  90 static ssize_t (*write_op[])(struct file *, char *, size_t) = {
  91         [NFSD_Svc] = write_svc,
  92         [NFSD_Add] = write_add,
  93         [NFSD_Del] = write_del,
  94         [NFSD_Export] = write_export,
  95         [NFSD_Unexport] = write_unexport,
  96         [NFSD_Getfd] = write_getfd,
  97         [NFSD_Getfs] = write_getfs,
  98         [NFSD_Fh] = write_filehandle,
  99         [NFSD_Threads] = write_threads,
 100         [NFSD_Pool_Threads] = write_pool_threads,
 101         [NFSD_Versions] = write_versions,
 102         [NFSD_Ports] = write_ports,
 103 #ifdef CONFIG_NFSD_V4
 104         [NFSD_Leasetime] = write_leasetime,
 105         [NFSD_RecoveryDir] = write_recoverydir,
 106 #endif
 107 };
 108
 109 static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
 110 {
 111         ino_t ino =  file->f_dentry->d_inode->i_ino;
 112         char *data;
 113         ssize_t rv;
 114
 115         if (ino >= ARRAY_SIZE(write_op) || !write_op[ino])
 116                 return -EINVAL;
 117
 118         data = simple_transaction_get(file, buf, size);
 119         if (IS_ERR(data))
 120                 return PTR_ERR(data);
 121
 122         rv =  write_op[ino](file, data, size);
 123         if (rv>0) {
 124                 simple_transaction_set(file, rv);
 125                 rv = size;
 126         }
 127         return rv;
 128 }
 129
 130 static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos)
 131 {
 132         if (! file->private_data) {
 133                 /* An attempt to read a transaction file without writing
 134                  * causes a 0-byte write so that the file can return
 135                  * state information
 136                  */
 137                 ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos);
 138                 if (rv < 0)
 139                         return rv;
 140         }
 141         return simple_transaction_read(file, buf, size, pos);
 142 }
 143
 144 static const struct file_operations transaction_ops = {
 145         .write          = nfsctl_transaction_write,
 146         .read           = nfsctl_transaction_read,
 147         .release        = simple_transaction_release,
 148 };
 149
 150 extern struct seq_operations nfs_exports_op;
 151 static int exports_open(struct inode *inode, struct file *file)
 152 {
 153         return seq_open(file, &nfs_exports_op);
 154 }
 155
 156 static const struct file_operations exports_operations = {
 157         .open           = exports_open,
 158         .read           = seq_read,
 159         .llseek         = seq_lseek,
 160         .release        = seq_release,
 161 };
 162
 163 /*----------------------------------------------------------------------------*/
 164 /*
 165  * payload - write methods
 166  * If the method has a response, the response should be put in buf,
 167  * and the length returned.  Otherwise return 0 or and -error.
 168  */
 169
 170 static ssize_t write_svc(struct file *file, char *buf, size_t size)
 171 {
 172         struct nfsctl_svc *data;
 173         if (size < sizeof(*data))
 174                 return -EINVAL;
 175         data = (struct nfsctl_svc*) buf;
 176         return nfsd_svc(data->svc_port, data->svc_nthreads);
 177 }
 178
 179 static ssize_t write_add(struct file *file, char *buf, size_t size)
 180 {
 181         struct nfsctl_client *data;
 182         if (size < sizeof(*data))
 183                 return -EINVAL;
 184         data = (struct nfsctl_client *)buf;
 185         return exp_addclient(data);
 186 }
 187
 188 static ssize_t write_del(struct file *file, char *buf, size_t size)
 189 {
 190         struct nfsctl_client *data;
 191         if (size < sizeof(*data))
 192                 return -EINVAL;
 193         data = (struct nfsctl_client *)buf;
 194         return exp_delclient(data);
 195 }
 196
 197 static ssize_t write_export(struct file *file, char *buf, size_t size)
 198 {
 199         struct nfsctl_export *data;
 200         if (size < sizeof(*data))
 201                 return -EINVAL;
 202         data = (struct nfsctl_export*)buf;
 203         return exp_export(data);
 204 }
 205
 206 static ssize_t write_unexport(struct file *file, char *buf, size_t size)
 207 {
 208         struct nfsctl_export *data;
 209
 210         if (size < sizeof(*data))
 211                 return -EINVAL;
 212         data = (struct nfsctl_export*)buf;
 213         return exp_unexport(data);
 214 }
 215
 216 static ssize_t write_getfs(struct file *file, char *buf, size_t size)
 217 {
 218         struct nfsctl_fsparm *data;
 219         struct sockaddr_in *sin;
 220         struct auth_domain *clp;
 221         int err = 0;
 222         struct knfsd_fh *res;
 223
 224         if (size < sizeof(*data))
 225                 return -EINVAL;
 226         data = (struct nfsctl_fsparm*)buf;
 227         err = -EPROTONOSUPPORT;
 228         if (data->gd_addr.sa_family != AF_INET)
 229                 goto out;
 230         sin = (struct sockaddr_in *)&data->gd_addr;
 231         if (data->gd_maxlen > NFS3_FHSIZE)
 232                 data->gd_maxlen = NFS3_FHSIZE;
 233
 234         res = (struct knfsd_fh*)buf;
 235
 236         exp_readlock();
 237         if (!(clp = auth_unix_lookup(sin->sin_addr)))
 238                 err = -EPERM;
 239         else {
 240                 err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen);
 241                 auth_domain_put(clp);
 242         }
 243         exp_readunlock();
 244         if (err == 0)
 245                 err = res->fh_size + (int)&((struct knfsd_fh*)0)->fh_base;
 246  out:
 247         return err;
 248 }
 249
 250 static ssize_t write_getfd(struct file *file, char *buf, size_t size)
 251 {
 252         struct nfsctl_fdparm *data;
 253         struct sockaddr_in *sin;
 254         struct auth_domain *clp;
 255         int err = 0;
 256         struct knfsd_fh fh;
 257         char *res;
 258
 259         if (size < sizeof(*data))
 260                 return -EINVAL;
 261         data = (struct nfsctl_fdparm*)buf;
 262         err = -EPROTONOSUPPORT;
 263         if (data->gd_addr.sa_family != AF_INET)
 264                 goto out;
 265         err = -EINVAL;
 266         if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS)
 267                 goto out;
 268
 269         res = buf;
 270         sin = (struct sockaddr_in *)&data->gd_addr;
 271         exp_readlock();
 272         if (!(clp = auth_unix_lookup(sin->sin_addr)))
 273                 err = -EPERM;
 274         else {
 275                 err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE);
 276                 auth_domain_put(clp);
 277         }
 278         exp_readunlock();
 279
 280         if (err == 0) {
 281                 memset(res,0, NFS_FHSIZE);
 282                 memcpy(res, &fh.fh_base, fh.fh_size);
 283                 err = NFS_FHSIZE;
 284         }
 285  out:
 286         return err;
 287 }
 288
 289 static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
 290 {
 291         /* request is:
 292          *   domain path maxsize
 293          * response is
 294          *   filehandle
 295          *
 296          * qword quoting is used, so filehandle will be \x....
 297          */
 298         char *dname, *path;
 299         int maxsize;
 300         char *mesg = buf;
 301         int len;
 302         struct auth_domain *dom;
 303         struct knfsd_fh fh;
 304
 305         if (buf[size-1] != '\n')
 306                 return -EINVAL;
 307         buf[size-1] = 0;
 308
 309         dname = mesg;
 310         len = qword_get(&mesg, dname, size);
 311         if (len <= 0) return -EINVAL;
 312
 313         path = dname+len+1;
 314         len = qword_get(&mesg, path, size);
 315         if (len <= 0) return -EINVAL;
 316
 317         len = get_int(&mesg, &maxsize);
 318         if (len)
 319                 return len;
 320
 321         if (maxsize < NFS_FHSIZE)
 322                 return -EINVAL;
 323         if (maxsize > NFS3_FHSIZE)
 324                 maxsize = NFS3_FHSIZE;
 325
 326         if (qword_get(&mesg, mesg, size)>0)
 327                 return -EINVAL;
 328
 329         /* we have all the words, they are in buf.. */
 330         dom = unix_domain_find(dname);
 331         if (!dom)
 332                 return -ENOMEM;
 333
 334         len = exp_rootfh(dom, path, &fh,  maxsize);
 335         auth_domain_put(dom);
 336         if (len)
 337                 return len;
 338
 339         mesg = buf; len = SIMPLE_TRANSACTION_LIMIT;
 340         qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
 341         mesg[-1] = '\n';
 342         return mesg - buf;
 343 }
 344
 345 extern int nfsd_nrthreads(void);
 346
 347 static ssize_t write_threads(struct file *file, char *buf, size_t size)
 348 {
 349         /* if size > 0, look for a number of threads and call nfsd_svc
 350          * then write out number of threads as reply
 351          */
 352         char *mesg = buf;
 353         int rv;
 354         if (size > 0) {
 355                 int newthreads;
 356                 rv = get_int(&mesg, &newthreads);
 357                 if (rv)
 358                         return rv;
 359                 if (newthreads <0)
 360                         return -EINVAL;
 361                 rv = nfsd_svc(2049, newthreads);
 362                 if (rv)
 363                         return rv;
 364         }
 365         sprintf(buf, "%d\n", nfsd_nrthreads());
 366         return strlen(buf);
 367 }
 368
 369 extern int nfsd_nrpools(void);
 370 extern int nfsd_get_nrthreads(int n, int *);
 371 extern int nfsd_set_nrthreads(int n, int *);
 372
 373 static ssize_t write_pool_threads(struct file *file, char *buf, size_t size)
 374 {
 375         /* if size > 0, look for an array of number of threads per node
 376          * and apply them  then write out number of threads per node as reply
 377          */
 378         char *mesg = buf;
 379         int i;
 380         int rv;
 381         int len;
 382         int npools = nfsd_nrpools();
 383         int *nthreads;
 384
 385         if (npools == 0) {
 386                 /*
 387                  * NFS is shut down.  The admin can start it by
 388                  * writing to the threads file but NOT the pool_threads
 389                  * file, sorry.  Report zero threads.
 390                  */
 391                 strcpy(buf, "0\n");
 392                 return strlen(buf);
 393         }
 394
 395         nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL);
 396         if (nthreads == NULL)
 397                 return -ENOMEM;
 398
 399         if (size > 0) {
 400                 for (i = 0; i < npools; i++) {
 401                         rv = get_int(&mesg, &nthreads[i]);
 402                         if (rv == -ENOENT)
 403                                 break;          /* fewer numbers than pools */
 404                         if (rv)
 405                                 goto out_free;  /* syntax error */
 406                         rv = -EINVAL;
 407                         if (nthreads[i] < 0)
 408                                 goto out_free;
 409                 }
 410                 rv = nfsd_set_nrthreads(i, nthreads);
 411                 if (rv)
 412                         goto out_free;
 413         }
 414
 415         rv = nfsd_get_nrthreads(npools, nthreads);
 416         if (rv)
 417                 goto out_free;
 418
 419         mesg = buf;
 420         size = SIMPLE_TRANSACTION_LIMIT;
 421         for (i = 0; i < npools && size > 0; i++) {
 422                 snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' '));
 423                 len = strlen(mesg);
 424                 size -= len;
 425                 mesg += len;
 426         }
 427
 428         return (mesg-buf);
 429
 430 out_free:
 431         kfree(nthreads);
 432         return rv;
 433 }
 434
 435 static ssize_t write_versions(struct file *file, char *buf, size_t size)
 436 {
 437         /*
 438          * Format:
 439          *   [-/+]vers [-/+]vers ...
 440          */
 441         char *mesg = buf;
 442         char *vers, sign;
 443         int len, num;
 444         ssize_t tlen = 0;
 445         char *sep;
 446
 447         if (size>0) {
 448                 if (nfsd_serv)
 449                         /* Cannot change versions without updating
 450                          * nfsd_serv->sv_xdrsize, and reallocing
 451                          * rq_argp and rq_resp
 452                          */
 453                         return -EBUSY;
 454                 if (buf[size-1] != '\n')
 455                         return -EINVAL;
 456                 buf[size-1] = 0;
 457
 458                 vers = mesg;
 459                 len = qword_get(&mesg, vers, size);
 460                 if (len <= 0) return -EINVAL;
 461                 do {
 462                         sign = *vers;
 463                         if (sign == '+' || sign == '-')
 464                                 num = simple_strtol((vers+1), NULL, 0);
 465                         else
 466                                 num = simple_strtol(vers, NULL, 0);
 467                         switch(num) {
 468                         case 2:
 469                         case 3:
 470                         case 4:
 471                                 nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET);
 472                                 break;
 473                         default:
 474                                 return -EINVAL;
 475                         }
 476                         vers += len + 1;
 477                         tlen += len;
 478                 } while ((len = qword_get(&mesg, vers, size)) > 0);
 479                 /* If all get turned off, turn them back on, as
 480                  * having no versions is BAD
 481                  */
 482                 nfsd_reset_versions();
 483         }
 484         /* Now write current state into reply buffer */
 485         len = 0;
 486         sep = "";
 487         for (num=2 ; num <= 4 ; num++)
 488                 if (nfsd_vers(num, NFSD_AVAIL)) {
 489                         len += sprintf(buf+len, "%s%c%d", sep,
 490                                        nfsd_vers(num, NFSD_TEST)?'+':'-',
 491                                        num);
 492                         sep = " ";
 493                 }
 494         len += sprintf(buf+len, "\n");
 495         return len;
 496 }
 497
 498 static ssize_t write_ports(struct file *file, char *buf, size_t size)
 499 {
 500         if (size == 0) {
 501                 int len = 0;
 502                 lock_kernel();
 503                 if (nfsd_serv)
 504                         len = svc_sock_names(buf, nfsd_serv, NULL);
 505                 unlock_kernel();
 506                 return len;
 507         }
 508         /* Either a single 'fd' number is written, in which
 509          * case it must be for a socket of a supported family/protocol,
 510          * and we use it as an nfsd socket, or
 511          * A '-' followed by the 'name' of a socket in which case
 512          * we close the socket.
 513          */
 514         if (isdigit(buf[0])) {
 515                 char *mesg = buf;
 516                 int fd;
 517                 int err;
 518                 err = get_int(&mesg, &fd);
 519                 if (err)
 520                         return -EINVAL;
 521                 if (fd < 0)
 522                         return -EINVAL;
 523                 err = nfsd_create_serv();
 524                 if (!err) {
 525                         int proto = 0;
 526                         err = lockd_up(proto);
 527                         if (!err) {
 528                                 err = svc_addsock(nfsd_serv, fd, buf, &proto);
 529                                 if (err)
 530                                         lockd_down();
 531                         }
 532                         /* Decrease the count, but don't shutdown the
 533                          * the service
 534                          */
 535                         lock_kernel();
 536                         nfsd_serv->sv_nrthreads--;
 537                         unlock_kernel();
 538                 }
 539                 return err;
 540         }
 541         if (buf[0] == '-') {
 542                 char *toclose = kstrdup(buf+1, GFP_KERNEL);
 543                 int len = 0;
 544                 if (!toclose)
 545                         return -ENOMEM;
 546                 lock_kernel();
 547                 if (nfsd_serv)
 548                         len = svc_sock_names(buf, nfsd_serv, toclose);
 549                 unlock_kernel();
 550                 if (len >= 0)
 551                         lockd_down();
 552                 kfree(toclose);
 553                 return len;
 554         }
 555         return -EINVAL;
 556 }
 557
 558 #ifdef CONFIG_NFSD_V4
 559 extern time_t nfs4_leasetime(void);
 560
 561 static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
 562 {
 563         /* if size > 10 seconds, call
 564          * nfs4_reset_lease() then write out the new lease (seconds) as reply
 565          */
 566         char *mesg = buf;
 567         int rv;
 568
 569         if (size > 0) {
 570                 int lease;
 571                 rv = get_int(&mesg, &lease);
 572                 if (rv)
 573                         return rv;
 574                 if (lease < 10 || lease > 3600)
 575                         return -EINVAL;
 576                 nfs4_reset_lease(lease);
 577         }
 578         sprintf(buf, "%ld\n", nfs4_lease_time());
 579         return strlen(buf);
 580 }
 581
 582 static ssize_t write_recoverydir(struct file *file, char *buf, size_t size)
 583 {
 584         char *mesg = buf;
 585         char *recdir;
 586         int len, status;
 587
 588         if (size > PATH_MAX || buf[size-1] != '\n')
 589                 return -EINVAL;
 590         buf[size-1] = 0;
 591
 592         recdir = mesg;
 593         len = qword_get(&mesg, recdir, size);
 594         if (len <= 0)
 595                 return -EINVAL;
 596
 597         status = nfs4_reset_recoverydir(recdir);
 598         return strlen(buf);
 599 }
 600 #endif
 601
 602 /*----------------------------------------------------------------------------*/
 603 /*
 604  *      populating the filesystem.
 605  */
 606
 607 static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
 608 {
 609         static struct tree_descr nfsd_files[] = {
 610                 [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR},
 611                 [NFSD_Add] = {".add", &transaction_ops, S_IWUSR},
 612                 [NFSD_Del] = {".del", &transaction_ops, S_IWUSR},
 613                 [NFSD_Export] = {".export", &transaction_ops, S_IWUSR},
 614                 [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR},
 615                 [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR},
 616                 [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR},
 617                 [NFSD_List] = {"exports", &exports_operations, S_IRUGO},
 618                 [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR},
 619                 [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
 620                 [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR},
 621                 [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR},
 622                 [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO},
 623 #ifdef CONFIG_NFSD_V4
 624                 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR},
 625                 [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR},
 626 #endif
 627                 /* last one */ {""}
 628         };
 629         return simple_fill_super(sb, 0x6e667364, nfsd_files);
 630 }
 631
 632 static int nfsd_get_sb(struct file_system_type *fs_type,
 633         int flags, const char *dev_name, void *data, struct vfsmount *mnt)
 634 {
 635         return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt);
 636 }
 637
 638 static struct file_system_type nfsd_fs_type = {
 639         .owner          = THIS_MODULE,
 640         .name           = "nfsd",
 641         .get_sb         = nfsd_get_sb,
 642         .kill_sb        = kill_litter_super,
 643 };
 644
 645 static int __init init_nfsd(void)
 646 {
 647         int retval;
 648         printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
 649
 650         nfsd_stat_init();       /* Statistics */
 651         nfsd_cache_init();      /* RPC reply cache */
 652         nfsd_export_init();     /* Exports table */
 653         nfsd_lockd_init();      /* lockd->nfsd callbacks */
 654         nfs4_state_init();      /* NFSv4 locking state */
 655         nfsd_idmap_init();      /* Name to ID mapping */
 656         if (proc_mkdir("fs/nfs", NULL)) {
 657                 struct proc_dir_entry *entry;
 658                 entry = create_proc_entry("fs/nfs/exports", 0, NULL);
 659                 if (entry)
 660                         entry->proc_fops =  &exports_operations;
 661         }
 662         retval = register_filesystem(&nfsd_fs_type);
 663         if (retval) {
 664                 nfsd_export_shutdown();
 665                 nfsd_cache_shutdown();
 666                 remove_proc_entry("fs/nfs/exports", NULL);
 667                 remove_proc_entry("fs/nfs", NULL);
 668                 nfsd_stat_shutdown();
 669                 nfsd_lockd_shutdown();
 670         }
 671         return retval;
 672 }
 673
 674 static void __exit exit_nfsd(void)
 675 {
 676         nfsd_export_shutdown();
 677         nfsd_cache_shutdown();
 678         remove_proc_entry("fs/nfs/exports", NULL);
 679         remove_proc_entry("fs/nfs", NULL);
 680         nfsd_stat_shutdown();
 681         nfsd_lockd_shutdown();
 682         nfsd_idmap_shutdown();
 683         unregister_filesystem(&nfsd_fs_type);
 684 }
 685
 686 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
 687 MODULE_LICENSE("GPL");
 688 module_init(init_nfsd)
 689 module_exit(exit_nfsd)