Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6
[linux-2.6] / fs / nfsd / nfsctl.c
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         NFSD_MaxBlkSize,
61         /*
62          * The below MUST come last.  Otherwise we leave a hole in nfsd_files[]
63          * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops
64          */
65 #ifdef CONFIG_NFSD_V4
66         NFSD_Leasetime,
67         NFSD_RecoveryDir,
68 #endif
69 };
70
71 /*
72  * write() for these nodes.
73  */
74 static ssize_t write_svc(struct file *file, char *buf, size_t size);
75 static ssize_t write_add(struct file *file, char *buf, size_t size);
76 static ssize_t write_del(struct file *file, char *buf, size_t size);
77 static ssize_t write_export(struct file *file, char *buf, size_t size);
78 static ssize_t write_unexport(struct file *file, char *buf, size_t size);
79 static ssize_t write_getfd(struct file *file, char *buf, size_t size);
80 static ssize_t write_getfs(struct file *file, char *buf, size_t size);
81 static ssize_t write_filehandle(struct file *file, char *buf, size_t size);
82 static ssize_t write_threads(struct file *file, char *buf, size_t size);
83 static ssize_t write_pool_threads(struct file *file, char *buf, size_t size);
84 static ssize_t write_versions(struct file *file, char *buf, size_t size);
85 static ssize_t write_ports(struct file *file, char *buf, size_t size);
86 static ssize_t write_maxblksize(struct file *file, char *buf, size_t size);
87 #ifdef CONFIG_NFSD_V4
88 static ssize_t write_leasetime(struct file *file, char *buf, size_t size);
89 static ssize_t write_recoverydir(struct file *file, char *buf, size_t size);
90 #endif
91
92 static ssize_t (*write_op[])(struct file *, char *, size_t) = {
93         [NFSD_Svc] = write_svc,
94         [NFSD_Add] = write_add,
95         [NFSD_Del] = write_del,
96         [NFSD_Export] = write_export,
97         [NFSD_Unexport] = write_unexport,
98         [NFSD_Getfd] = write_getfd,
99         [NFSD_Getfs] = write_getfs,
100         [NFSD_Fh] = write_filehandle,
101         [NFSD_Threads] = write_threads,
102         [NFSD_Pool_Threads] = write_pool_threads,
103         [NFSD_Versions] = write_versions,
104         [NFSD_Ports] = write_ports,
105         [NFSD_MaxBlkSize] = write_maxblksize,
106 #ifdef CONFIG_NFSD_V4
107         [NFSD_Leasetime] = write_leasetime,
108         [NFSD_RecoveryDir] = write_recoverydir,
109 #endif
110 };
111
112 static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
113 {
114         ino_t ino =  file->f_path.dentry->d_inode->i_ino;
115         char *data;
116         ssize_t rv;
117
118         if (ino >= ARRAY_SIZE(write_op) || !write_op[ino])
119                 return -EINVAL;
120
121         data = simple_transaction_get(file, buf, size);
122         if (IS_ERR(data))
123                 return PTR_ERR(data);
124
125         rv =  write_op[ino](file, data, size);
126         if (rv >= 0) {
127                 simple_transaction_set(file, rv);
128                 rv = size;
129         }
130         return rv;
131 }
132
133 static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos)
134 {
135         if (! file->private_data) {
136                 /* An attempt to read a transaction file without writing
137                  * causes a 0-byte write so that the file can return
138                  * state information
139                  */
140                 ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos);
141                 if (rv < 0)
142                         return rv;
143         }
144         return simple_transaction_read(file, buf, size, pos);
145 }
146
147 static const struct file_operations transaction_ops = {
148         .write          = nfsctl_transaction_write,
149         .read           = nfsctl_transaction_read,
150         .release        = simple_transaction_release,
151 };
152
153 extern struct seq_operations nfs_exports_op;
154 static int exports_open(struct inode *inode, struct file *file)
155 {
156         return seq_open(file, &nfs_exports_op);
157 }
158
159 static const struct file_operations exports_operations = {
160         .open           = exports_open,
161         .read           = seq_read,
162         .llseek         = seq_lseek,
163         .release        = seq_release,
164 };
165
166 /*----------------------------------------------------------------------------*/
167 /*
168  * payload - write methods
169  * If the method has a response, the response should be put in buf,
170  * and the length returned.  Otherwise return 0 or and -error.
171  */
172
173 static ssize_t write_svc(struct file *file, char *buf, size_t size)
174 {
175         struct nfsctl_svc *data;
176         if (size < sizeof(*data))
177                 return -EINVAL;
178         data = (struct nfsctl_svc*) buf;
179         return nfsd_svc(data->svc_port, data->svc_nthreads);
180 }
181
182 static ssize_t write_add(struct file *file, char *buf, size_t size)
183 {
184         struct nfsctl_client *data;
185         if (size < sizeof(*data))
186                 return -EINVAL;
187         data = (struct nfsctl_client *)buf;
188         return exp_addclient(data);
189 }
190
191 static ssize_t write_del(struct file *file, char *buf, size_t size)
192 {
193         struct nfsctl_client *data;
194         if (size < sizeof(*data))
195                 return -EINVAL;
196         data = (struct nfsctl_client *)buf;
197         return exp_delclient(data);
198 }
199
200 static ssize_t write_export(struct file *file, char *buf, size_t size)
201 {
202         struct nfsctl_export *data;
203         if (size < sizeof(*data))
204                 return -EINVAL;
205         data = (struct nfsctl_export*)buf;
206         return exp_export(data);
207 }
208
209 static ssize_t write_unexport(struct file *file, char *buf, size_t size)
210 {
211         struct nfsctl_export *data;
212
213         if (size < sizeof(*data))
214                 return -EINVAL;
215         data = (struct nfsctl_export*)buf;
216         return exp_unexport(data);
217 }
218
219 static ssize_t write_getfs(struct file *file, char *buf, size_t size)
220 {
221         struct nfsctl_fsparm *data;
222         struct sockaddr_in *sin;
223         struct auth_domain *clp;
224         int err = 0;
225         struct knfsd_fh *res;
226
227         if (size < sizeof(*data))
228                 return -EINVAL;
229         data = (struct nfsctl_fsparm*)buf;
230         err = -EPROTONOSUPPORT;
231         if (data->gd_addr.sa_family != AF_INET)
232                 goto out;
233         sin = (struct sockaddr_in *)&data->gd_addr;
234         if (data->gd_maxlen > NFS3_FHSIZE)
235                 data->gd_maxlen = NFS3_FHSIZE;
236
237         res = (struct knfsd_fh*)buf;
238
239         exp_readlock();
240         if (!(clp = auth_unix_lookup(sin->sin_addr)))
241                 err = -EPERM;
242         else {
243                 err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen);
244                 auth_domain_put(clp);
245         }
246         exp_readunlock();
247         if (err == 0)
248                 err = res->fh_size + (int)&((struct knfsd_fh*)0)->fh_base;
249  out:
250         return err;
251 }
252
253 static ssize_t write_getfd(struct file *file, char *buf, size_t size)
254 {
255         struct nfsctl_fdparm *data;
256         struct sockaddr_in *sin;
257         struct auth_domain *clp;
258         int err = 0;
259         struct knfsd_fh fh;
260         char *res;
261
262         if (size < sizeof(*data))
263                 return -EINVAL;
264         data = (struct nfsctl_fdparm*)buf;
265         err = -EPROTONOSUPPORT;
266         if (data->gd_addr.sa_family != AF_INET)
267                 goto out;
268         err = -EINVAL;
269         if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS)
270                 goto out;
271
272         res = buf;
273         sin = (struct sockaddr_in *)&data->gd_addr;
274         exp_readlock();
275         if (!(clp = auth_unix_lookup(sin->sin_addr)))
276                 err = -EPERM;
277         else {
278                 err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE);
279                 auth_domain_put(clp);
280         }
281         exp_readunlock();
282
283         if (err == 0) {
284                 memset(res,0, NFS_FHSIZE);
285                 memcpy(res, &fh.fh_base, fh.fh_size);
286                 err = NFS_FHSIZE;
287         }
288  out:
289         return err;
290 }
291
292 static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
293 {
294         /* request is:
295          *   domain path maxsize
296          * response is
297          *   filehandle
298          *
299          * qword quoting is used, so filehandle will be \x....
300          */
301         char *dname, *path;
302         int maxsize;
303         char *mesg = buf;
304         int len;
305         struct auth_domain *dom;
306         struct knfsd_fh fh;
307
308         if (buf[size-1] != '\n')
309                 return -EINVAL;
310         buf[size-1] = 0;
311
312         dname = mesg;
313         len = qword_get(&mesg, dname, size);
314         if (len <= 0) return -EINVAL;
315         
316         path = dname+len+1;
317         len = qword_get(&mesg, path, size);
318         if (len <= 0) return -EINVAL;
319
320         len = get_int(&mesg, &maxsize);
321         if (len)
322                 return len;
323
324         if (maxsize < NFS_FHSIZE)
325                 return -EINVAL;
326         if (maxsize > NFS3_FHSIZE)
327                 maxsize = NFS3_FHSIZE;
328
329         if (qword_get(&mesg, mesg, size)>0)
330                 return -EINVAL;
331
332         /* we have all the words, they are in buf.. */
333         dom = unix_domain_find(dname);
334         if (!dom)
335                 return -ENOMEM;
336
337         len = exp_rootfh(dom, path, &fh,  maxsize);
338         auth_domain_put(dom);
339         if (len)
340                 return len;
341         
342         mesg = buf; len = SIMPLE_TRANSACTION_LIMIT;
343         qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
344         mesg[-1] = '\n';
345         return mesg - buf;      
346 }
347
348 extern int nfsd_nrthreads(void);
349
350 static ssize_t write_threads(struct file *file, char *buf, size_t size)
351 {
352         /* if size > 0, look for a number of threads and call nfsd_svc
353          * then write out number of threads as reply
354          */
355         char *mesg = buf;
356         int rv;
357         if (size > 0) {
358                 int newthreads;
359                 rv = get_int(&mesg, &newthreads);
360                 if (rv)
361                         return rv;
362                 if (newthreads <0)
363                         return -EINVAL;
364                 rv = nfsd_svc(2049, newthreads);
365                 if (rv)
366                         return rv;
367         }
368         sprintf(buf, "%d\n", nfsd_nrthreads());
369         return strlen(buf);
370 }
371
372 extern int nfsd_nrpools(void);
373 extern int nfsd_get_nrthreads(int n, int *);
374 extern int nfsd_set_nrthreads(int n, int *);
375
376 static ssize_t write_pool_threads(struct file *file, char *buf, size_t size)
377 {
378         /* if size > 0, look for an array of number of threads per node
379          * and apply them  then write out number of threads per node as reply
380          */
381         char *mesg = buf;
382         int i;
383         int rv;
384         int len;
385         int npools = nfsd_nrpools();
386         int *nthreads;
387
388         if (npools == 0) {
389                 /*
390                  * NFS is shut down.  The admin can start it by
391                  * writing to the threads file but NOT the pool_threads
392                  * file, sorry.  Report zero threads.
393                  */
394                 strcpy(buf, "0\n");
395                 return strlen(buf);
396         }
397
398         nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL);
399         if (nthreads == NULL)
400                 return -ENOMEM;
401
402         if (size > 0) {
403                 for (i = 0; i < npools; i++) {
404                         rv = get_int(&mesg, &nthreads[i]);
405                         if (rv == -ENOENT)
406                                 break;          /* fewer numbers than pools */
407                         if (rv)
408                                 goto out_free;  /* syntax error */
409                         rv = -EINVAL;
410                         if (nthreads[i] < 0)
411                                 goto out_free;
412                 }
413                 rv = nfsd_set_nrthreads(i, nthreads);
414                 if (rv)
415                         goto out_free;
416         }
417
418         rv = nfsd_get_nrthreads(npools, nthreads);
419         if (rv)
420                 goto out_free;
421
422         mesg = buf;
423         size = SIMPLE_TRANSACTION_LIMIT;
424         for (i = 0; i < npools && size > 0; i++) {
425                 snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' '));
426                 len = strlen(mesg);
427                 size -= len;
428                 mesg += len;
429         }
430
431         return (mesg-buf);
432
433 out_free:
434         kfree(nthreads);
435         return rv;
436 }
437
438 static ssize_t write_versions(struct file *file, char *buf, size_t size)
439 {
440         /*
441          * Format:
442          *   [-/+]vers [-/+]vers ...
443          */
444         char *mesg = buf;
445         char *vers, sign;
446         int len, num;
447         ssize_t tlen = 0;
448         char *sep;
449
450         if (size>0) {
451                 if (nfsd_serv)
452                         /* Cannot change versions without updating
453                          * nfsd_serv->sv_xdrsize, and reallocing
454                          * rq_argp and rq_resp
455                          */
456                         return -EBUSY;
457                 if (buf[size-1] != '\n')
458                         return -EINVAL;
459                 buf[size-1] = 0;
460
461                 vers = mesg;
462                 len = qword_get(&mesg, vers, size);
463                 if (len <= 0) return -EINVAL;
464                 do {
465                         sign = *vers;
466                         if (sign == '+' || sign == '-')
467                                 num = simple_strtol((vers+1), NULL, 0);
468                         else
469                                 num = simple_strtol(vers, NULL, 0);
470                         switch(num) {
471                         case 2:
472                         case 3:
473                         case 4:
474                                 nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET);
475                                 break;
476                         default:
477                                 return -EINVAL;
478                         }
479                         vers += len + 1;
480                         tlen += len;
481                 } while ((len = qword_get(&mesg, vers, size)) > 0);
482                 /* If all get turned off, turn them back on, as
483                  * having no versions is BAD
484                  */
485                 nfsd_reset_versions();
486         }
487         /* Now write current state into reply buffer */
488         len = 0;
489         sep = "";
490         for (num=2 ; num <= 4 ; num++)
491                 if (nfsd_vers(num, NFSD_AVAIL)) {
492                         len += sprintf(buf+len, "%s%c%d", sep,
493                                        nfsd_vers(num, NFSD_TEST)?'+':'-',
494                                        num);
495                         sep = " ";
496                 }
497         len += sprintf(buf+len, "\n");
498         return len;
499 }
500
501 static ssize_t write_ports(struct file *file, char *buf, size_t size)
502 {
503         if (size == 0) {
504                 int len = 0;
505                 lock_kernel();
506                 if (nfsd_serv)
507                         len = svc_sock_names(buf, nfsd_serv, NULL);
508                 unlock_kernel();
509                 return len;
510         }
511         /* Either a single 'fd' number is written, in which
512          * case it must be for a socket of a supported family/protocol,
513          * and we use it as an nfsd socket, or
514          * A '-' followed by the 'name' of a socket in which case
515          * we close the socket.
516          */
517         if (isdigit(buf[0])) {
518                 char *mesg = buf;
519                 int fd;
520                 int err;
521                 err = get_int(&mesg, &fd);
522                 if (err)
523                         return -EINVAL;
524                 if (fd < 0)
525                         return -EINVAL;
526                 err = nfsd_create_serv();
527                 if (!err) {
528                         int proto = 0;
529                         err = svc_addsock(nfsd_serv, fd, buf, &proto);
530                         if (err >= 0) {
531                                 err = lockd_up(proto);
532                                 if (err < 0)
533                                         svc_sock_names(buf+strlen(buf)+1, nfsd_serv, buf);
534                         }
535                         /* Decrease the count, but don't shutdown the
536                          * the service
537                          */
538                         lock_kernel();
539                         nfsd_serv->sv_nrthreads--;
540                         unlock_kernel();
541                 }
542                 return err < 0 ? err : 0;
543         }
544         if (buf[0] == '-') {
545                 char *toclose = kstrdup(buf+1, GFP_KERNEL);
546                 int len = 0;
547                 if (!toclose)
548                         return -ENOMEM;
549                 lock_kernel();
550                 if (nfsd_serv)
551                         len = svc_sock_names(buf, nfsd_serv, toclose);
552                 unlock_kernel();
553                 if (len >= 0)
554                         lockd_down();
555                 kfree(toclose);
556                 return len;
557         }
558         return -EINVAL;
559 }
560
561 int nfsd_max_blksize;
562
563 static ssize_t write_maxblksize(struct file *file, char *buf, size_t size)
564 {
565         char *mesg = buf;
566         if (size > 0) {
567                 int bsize;
568                 int rv = get_int(&mesg, &bsize);
569                 if (rv)
570                         return rv;
571                 /* force bsize into allowed range and
572                  * required alignment.
573                  */
574                 if (bsize < 1024)
575                         bsize = 1024;
576                 if (bsize > NFSSVC_MAXBLKSIZE)
577                         bsize = NFSSVC_MAXBLKSIZE;
578                 bsize &= ~(1024-1);
579                 lock_kernel();
580                 if (nfsd_serv && nfsd_serv->sv_nrthreads) {
581                         unlock_kernel();
582                         return -EBUSY;
583                 }
584                 nfsd_max_blksize = bsize;
585                 unlock_kernel();
586         }
587         return sprintf(buf, "%d\n", nfsd_max_blksize);
588 }
589
590 #ifdef CONFIG_NFSD_V4
591 extern time_t nfs4_leasetime(void);
592
593 static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
594 {
595         /* if size > 10 seconds, call
596          * nfs4_reset_lease() then write out the new lease (seconds) as reply
597          */
598         char *mesg = buf;
599         int rv;
600
601         if (size > 0) {
602                 int lease;
603                 rv = get_int(&mesg, &lease);
604                 if (rv)
605                         return rv;
606                 if (lease < 10 || lease > 3600)
607                         return -EINVAL;
608                 nfs4_reset_lease(lease);
609         }
610         sprintf(buf, "%ld\n", nfs4_lease_time());
611         return strlen(buf);
612 }
613
614 static ssize_t write_recoverydir(struct file *file, char *buf, size_t size)
615 {
616         char *mesg = buf;
617         char *recdir;
618         int len, status;
619
620         if (size > PATH_MAX || buf[size-1] != '\n')
621                 return -EINVAL;
622         buf[size-1] = 0;
623
624         recdir = mesg;
625         len = qword_get(&mesg, recdir, size);
626         if (len <= 0)
627                 return -EINVAL;
628
629         status = nfs4_reset_recoverydir(recdir);
630         return strlen(buf);
631 }
632 #endif
633
634 /*----------------------------------------------------------------------------*/
635 /*
636  *      populating the filesystem.
637  */
638
639 static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
640 {
641         static struct tree_descr nfsd_files[] = {
642                 [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR},
643                 [NFSD_Add] = {".add", &transaction_ops, S_IWUSR},
644                 [NFSD_Del] = {".del", &transaction_ops, S_IWUSR},
645                 [NFSD_Export] = {".export", &transaction_ops, S_IWUSR},
646                 [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR},
647                 [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR},
648                 [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR},
649                 [NFSD_List] = {"exports", &exports_operations, S_IRUGO},
650                 [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR},
651                 [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
652                 [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR},
653                 [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR},
654                 [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO},
655                 [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO},
656 #ifdef CONFIG_NFSD_V4
657                 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR},
658                 [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR},
659 #endif
660                 /* last one */ {""}
661         };
662         return simple_fill_super(sb, 0x6e667364, nfsd_files);
663 }
664
665 static int nfsd_get_sb(struct file_system_type *fs_type,
666         int flags, const char *dev_name, void *data, struct vfsmount *mnt)
667 {
668         return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt);
669 }
670
671 static struct file_system_type nfsd_fs_type = {
672         .owner          = THIS_MODULE,
673         .name           = "nfsd",
674         .get_sb         = nfsd_get_sb,
675         .kill_sb        = kill_litter_super,
676 };
677
678 static int __init init_nfsd(void)
679 {
680         int retval;
681         printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
682
683         nfsd_stat_init();       /* Statistics */
684         nfsd_cache_init();      /* RPC reply cache */
685         nfsd_export_init();     /* Exports table */
686         nfsd_lockd_init();      /* lockd->nfsd callbacks */
687         nfs4_state_init();      /* NFSv4 locking state */
688         nfsd_idmap_init();      /* Name to ID mapping */
689         if (proc_mkdir("fs/nfs", NULL)) {
690                 struct proc_dir_entry *entry;
691                 entry = create_proc_entry("fs/nfs/exports", 0, NULL);
692                 if (entry)
693                         entry->proc_fops =  &exports_operations;
694         }
695         retval = register_filesystem(&nfsd_fs_type);
696         if (retval) {
697                 nfsd_export_shutdown();
698                 nfsd_cache_shutdown();
699                 remove_proc_entry("fs/nfs/exports", NULL);
700                 remove_proc_entry("fs/nfs", NULL);
701                 nfsd_stat_shutdown();
702                 nfsd_lockd_shutdown();
703         }
704         return retval;
705 }
706
707 static void __exit exit_nfsd(void)
708 {
709         nfsd_export_shutdown();
710         nfsd_cache_shutdown();
711         remove_proc_entry("fs/nfs/exports", NULL);
712         remove_proc_entry("fs/nfs", NULL);
713         nfsd_stat_shutdown();
714         nfsd_lockd_shutdown();
715         nfsd_idmap_shutdown();
716         unregister_filesystem(&nfsd_fs_type);
717 }
718
719 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
720 MODULE_LICENSE("GPL");
721 module_init(init_nfsd)
722 module_exit(exit_nfsd)