b764d7d898e9bb4035e12c9ed4ea3f6dd9069b8d
[linux-2.6.git] / 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/namei.h>
16 #include <linux/fcntl.h>
17 #include <linux/net.h>
18 #include <linux/in.h>
19 #include <linux/syscalls.h>
20 #include <linux/unistd.h>
21 #include <linux/slab.h>
22 #include <linux/proc_fs.h>
23 #include <linux/seq_file.h>
24 #include <linux/pagemap.h>
25 #include <linux/init.h>
26 #include <linux/inet.h>
27 #include <linux/string.h>
28 #include <linux/ctype.h>
29
30 #include <linux/nfs.h>
31 #include <linux/nfsd_idmap.h>
32 #include <linux/lockd/bind.h>
33 #include <linux/sunrpc/svc.h>
34 #include <linux/sunrpc/svcsock.h>
35 #include <linux/nfsd/nfsd.h>
36 #include <linux/nfsd/cache.h>
37 #include <linux/nfsd/xdr.h>
38 #include <linux/nfsd/syscall.h>
39 #include <linux/lockd/lockd.h>
40 #include <linux/sunrpc/clnt.h>
41
42 #include <asm/uaccess.h>
43 #include <net/ipv6.h>
44
45 /*
46  *      We have a single directory with 9 nodes in it.
47  */
48 enum {
49         NFSD_Root = 1,
50         NFSD_Svc,
51         NFSD_Add,
52         NFSD_Del,
53         NFSD_Export,
54         NFSD_Unexport,
55         NFSD_Getfd,
56         NFSD_Getfs,
57         NFSD_List,
58         NFSD_Fh,
59         NFSD_FO_UnlockIP,
60         NFSD_FO_UnlockFS,
61         NFSD_Threads,
62         NFSD_Pool_Threads,
63         NFSD_Pool_Stats,
64         NFSD_Versions,
65         NFSD_Ports,
66         NFSD_MaxBlkSize,
67         /*
68          * The below MUST come last.  Otherwise we leave a hole in nfsd_files[]
69          * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops
70          */
71 #ifdef CONFIG_NFSD_V4
72         NFSD_Leasetime,
73         NFSD_RecoveryDir,
74 #endif
75 };
76
77 /*
78  * write() for these nodes.
79  */
80 static ssize_t write_svc(struct file *file, char *buf, size_t size);
81 static ssize_t write_add(struct file *file, char *buf, size_t size);
82 static ssize_t write_del(struct file *file, char *buf, size_t size);
83 static ssize_t write_export(struct file *file, char *buf, size_t size);
84 static ssize_t write_unexport(struct file *file, char *buf, size_t size);
85 static ssize_t write_getfd(struct file *file, char *buf, size_t size);
86 static ssize_t write_getfs(struct file *file, char *buf, size_t size);
87 static ssize_t write_filehandle(struct file *file, char *buf, size_t size);
88 static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size);
89 static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size);
90 static ssize_t write_threads(struct file *file, char *buf, size_t size);
91 static ssize_t write_pool_threads(struct file *file, char *buf, size_t size);
92 static ssize_t write_versions(struct file *file, char *buf, size_t size);
93 static ssize_t write_ports(struct file *file, char *buf, size_t size);
94 static ssize_t write_maxblksize(struct file *file, char *buf, size_t size);
95 #ifdef CONFIG_NFSD_V4
96 static ssize_t write_leasetime(struct file *file, char *buf, size_t size);
97 static ssize_t write_recoverydir(struct file *file, char *buf, size_t size);
98 #endif
99
100 static ssize_t (*write_op[])(struct file *, char *, size_t) = {
101         [NFSD_Svc] = write_svc,
102         [NFSD_Add] = write_add,
103         [NFSD_Del] = write_del,
104         [NFSD_Export] = write_export,
105         [NFSD_Unexport] = write_unexport,
106         [NFSD_Getfd] = write_getfd,
107         [NFSD_Getfs] = write_getfs,
108         [NFSD_Fh] = write_filehandle,
109         [NFSD_FO_UnlockIP] = write_unlock_ip,
110         [NFSD_FO_UnlockFS] = write_unlock_fs,
111         [NFSD_Threads] = write_threads,
112         [NFSD_Pool_Threads] = write_pool_threads,
113         [NFSD_Versions] = write_versions,
114         [NFSD_Ports] = write_ports,
115         [NFSD_MaxBlkSize] = write_maxblksize,
116 #ifdef CONFIG_NFSD_V4
117         [NFSD_Leasetime] = write_leasetime,
118         [NFSD_RecoveryDir] = write_recoverydir,
119 #endif
120 };
121
122 static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
123 {
124         ino_t ino =  file->f_path.dentry->d_inode->i_ino;
125         char *data;
126         ssize_t rv;
127
128         if (ino >= ARRAY_SIZE(write_op) || !write_op[ino])
129                 return -EINVAL;
130
131         data = simple_transaction_get(file, buf, size);
132         if (IS_ERR(data))
133                 return PTR_ERR(data);
134
135         rv =  write_op[ino](file, data, size);
136         if (rv >= 0) {
137                 simple_transaction_set(file, rv);
138                 rv = size;
139         }
140         return rv;
141 }
142
143 static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos)
144 {
145         if (! file->private_data) {
146                 /* An attempt to read a transaction file without writing
147                  * causes a 0-byte write so that the file can return
148                  * state information
149                  */
150                 ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos);
151                 if (rv < 0)
152                         return rv;
153         }
154         return simple_transaction_read(file, buf, size, pos);
155 }
156
157 static const struct file_operations transaction_ops = {
158         .write          = nfsctl_transaction_write,
159         .read           = nfsctl_transaction_read,
160         .release        = simple_transaction_release,
161 };
162
163 static int exports_open(struct inode *inode, struct file *file)
164 {
165         return seq_open(file, &nfs_exports_op);
166 }
167
168 static const struct file_operations exports_operations = {
169         .open           = exports_open,
170         .read           = seq_read,
171         .llseek         = seq_lseek,
172         .release        = seq_release,
173         .owner          = THIS_MODULE,
174 };
175
176 extern int nfsd_pool_stats_open(struct inode *inode, struct file *file);
177
178 static struct file_operations pool_stats_operations = {
179         .open           = nfsd_pool_stats_open,
180         .read           = seq_read,
181         .llseek         = seq_lseek,
182         .release        = seq_release,
183         .owner          = THIS_MODULE,
184 };
185
186 /*----------------------------------------------------------------------------*/
187 /*
188  * payload - write methods
189  */
190
191 /**
192  * write_svc - Start kernel's NFSD server
193  *
194  * Deprecated.  /proc/fs/nfsd/threads is preferred.
195  * Function remains to support old versions of nfs-utils.
196  *
197  * Input:
198  *                      buf:    struct nfsctl_svc
199  *                              svc_port:       port number of this
200  *                                              server's listener
201  *                              svc_nthreads:   number of threads to start
202  *                      size:   size in bytes of passed in nfsctl_svc
203  * Output:
204  *      On success:     returns zero
205  *      On error:       return code is negative errno value
206  */
207 static ssize_t write_svc(struct file *file, char *buf, size_t size)
208 {
209         struct nfsctl_svc *data;
210         int err;
211         if (size < sizeof(*data))
212                 return -EINVAL;
213         data = (struct nfsctl_svc*) buf;
214         err = nfsd_svc(data->svc_port, data->svc_nthreads);
215         if (err < 0)
216                 return err;
217         return 0;
218 }
219
220 /**
221  * write_add - Add or modify client entry in auth unix cache
222  *
223  * Deprecated.  /proc/net/rpc/auth.unix.ip is preferred.
224  * Function remains to support old versions of nfs-utils.
225  *
226  * Input:
227  *                      buf:    struct nfsctl_client
228  *                              cl_ident:       '\0'-terminated C string
229  *                                              containing domain name
230  *                                              of client
231  *                              cl_naddr:       no. of items in cl_addrlist
232  *                              cl_addrlist:    array of client addresses
233  *                              cl_fhkeytype:   ignored
234  *                              cl_fhkeylen:    ignored
235  *                              cl_fhkey:       ignored
236  *                      size:   size in bytes of passed in nfsctl_client
237  * Output:
238  *      On success:     returns zero
239  *      On error:       return code is negative errno value
240  *
241  * Note: Only AF_INET client addresses are passed in, since
242  * nfsctl_client.cl_addrlist contains only in_addr fields for addresses.
243  */
244 static ssize_t write_add(struct file *file, char *buf, size_t size)
245 {
246         struct nfsctl_client *data;
247         if (size < sizeof(*data))
248                 return -EINVAL;
249         data = (struct nfsctl_client *)buf;
250         return exp_addclient(data);
251 }
252
253 /**
254  * write_del - Remove client from auth unix cache
255  *
256  * Deprecated.  /proc/net/rpc/auth.unix.ip is preferred.
257  * Function remains to support old versions of nfs-utils.
258  *
259  * Input:
260  *                      buf:    struct nfsctl_client
261  *                              cl_ident:       '\0'-terminated C string
262  *                                              containing domain name
263  *                                              of client
264  *                              cl_naddr:       ignored
265  *                              cl_addrlist:    ignored
266  *                              cl_fhkeytype:   ignored
267  *                              cl_fhkeylen:    ignored
268  *                              cl_fhkey:       ignored
269  *                      size:   size in bytes of passed in nfsctl_client
270  * Output:
271  *      On success:     returns zero
272  *      On error:       return code is negative errno value
273  *
274  * Note: Only AF_INET client addresses are passed in, since
275  * nfsctl_client.cl_addrlist contains only in_addr fields for addresses.
276  */
277 static ssize_t write_del(struct file *file, char *buf, size_t size)
278 {
279         struct nfsctl_client *data;
280         if (size < sizeof(*data))
281                 return -EINVAL;
282         data = (struct nfsctl_client *)buf;
283         return exp_delclient(data);
284 }
285
286 /**
287  * write_export - Export part or all of a local file system
288  *
289  * Deprecated.  /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred.
290  * Function remains to support old versions of nfs-utils.
291  *
292  * Input:
293  *                      buf:    struct nfsctl_export
294  *                              ex_client:      '\0'-terminated C string
295  *                                              containing domain name
296  *                                              of client allowed to access
297  *                                              this export
298  *                              ex_path:        '\0'-terminated C string
299  *                                              containing pathname of
300  *                                              directory in local file system
301  *                              ex_dev:         fsid to use for this export
302  *                              ex_ino:         ignored
303  *                              ex_flags:       export flags for this export
304  *                              ex_anon_uid:    UID to use for anonymous
305  *                                              requests
306  *                              ex_anon_gid:    GID to use for anonymous
307  *                                              requests
308  *                      size:   size in bytes of passed in nfsctl_export
309  * Output:
310  *      On success:     returns zero
311  *      On error:       return code is negative errno value
312  */
313 static ssize_t write_export(struct file *file, char *buf, size_t size)
314 {
315         struct nfsctl_export *data;
316         if (size < sizeof(*data))
317                 return -EINVAL;
318         data = (struct nfsctl_export*)buf;
319         return exp_export(data);
320 }
321
322 /**
323  * write_unexport - Unexport a previously exported file system
324  *
325  * Deprecated.  /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred.
326  * Function remains to support old versions of nfs-utils.
327  *
328  * Input:
329  *                      buf:    struct nfsctl_export
330  *                              ex_client:      '\0'-terminated C string
331  *                                              containing domain name
332  *                                              of client no longer allowed
333  *                                              to access this export
334  *                              ex_path:        '\0'-terminated C string
335  *                                              containing pathname of
336  *                                              directory in local file system
337  *                              ex_dev:         ignored
338  *                              ex_ino:         ignored
339  *                              ex_flags:       ignored
340  *                              ex_anon_uid:    ignored
341  *                              ex_anon_gid:    ignored
342  *                      size:   size in bytes of passed in nfsctl_export
343  * Output:
344  *      On success:     returns zero
345  *      On error:       return code is negative errno value
346  */
347 static ssize_t write_unexport(struct file *file, char *buf, size_t size)
348 {
349         struct nfsctl_export *data;
350
351         if (size < sizeof(*data))
352                 return -EINVAL;
353         data = (struct nfsctl_export*)buf;
354         return exp_unexport(data);
355 }
356
357 /**
358  * write_getfs - Get a variable-length NFS file handle by path
359  *
360  * Deprecated.  /proc/fs/nfsd/filehandle is preferred.
361  * Function remains to support old versions of nfs-utils.
362  *
363  * Input:
364  *                      buf:    struct nfsctl_fsparm
365  *                              gd_addr:        socket address of client
366  *                              gd_path:        '\0'-terminated C string
367  *                                              containing pathname of
368  *                                              directory in local file system
369  *                              gd_maxlen:      maximum size of returned file
370  *                                              handle
371  *                      size:   size in bytes of passed in nfsctl_fsparm
372  * Output:
373  *      On success:     passed-in buffer filled with a knfsd_fh structure
374  *                      (a variable-length raw NFS file handle);
375  *                      return code is the size in bytes of the file handle
376  *      On error:       return code is negative errno value
377  *
378  * Note: Only AF_INET client addresses are passed in, since gd_addr
379  * is the same size as a struct sockaddr_in.
380  */
381 static ssize_t write_getfs(struct file *file, char *buf, size_t size)
382 {
383         struct nfsctl_fsparm *data;
384         struct sockaddr_in *sin;
385         struct auth_domain *clp;
386         int err = 0;
387         struct knfsd_fh *res;
388         struct in6_addr in6;
389
390         if (size < sizeof(*data))
391                 return -EINVAL;
392         data = (struct nfsctl_fsparm*)buf;
393         err = -EPROTONOSUPPORT;
394         if (data->gd_addr.sa_family != AF_INET)
395                 goto out;
396         sin = (struct sockaddr_in *)&data->gd_addr;
397         if (data->gd_maxlen > NFS3_FHSIZE)
398                 data->gd_maxlen = NFS3_FHSIZE;
399
400         res = (struct knfsd_fh*)buf;
401
402         exp_readlock();
403
404         ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6);
405
406         clp = auth_unix_lookup(&in6);
407         if (!clp)
408                 err = -EPERM;
409         else {
410                 err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen);
411                 auth_domain_put(clp);
412         }
413         exp_readunlock();
414         if (err == 0)
415                 err = res->fh_size + offsetof(struct knfsd_fh, fh_base);
416  out:
417         return err;
418 }
419
420 /**
421  * write_getfd - Get a fixed-length NFS file handle by path (used by mountd)
422  *
423  * Deprecated.  /proc/fs/nfsd/filehandle is preferred.
424  * Function remains to support old versions of nfs-utils.
425  *
426  * Input:
427  *                      buf:    struct nfsctl_fdparm
428  *                              gd_addr:        socket address of client
429  *                              gd_path:        '\0'-terminated C string
430  *                                              containing pathname of
431  *                                              directory in local file system
432  *                              gd_version:     fdparm structure version
433  *                      size:   size in bytes of passed in nfsctl_fdparm
434  * Output:
435  *      On success:     passed-in buffer filled with nfsctl_res
436  *                      (a fixed-length raw NFS file handle);
437  *                      return code is the size in bytes of the file handle
438  *      On error:       return code is negative errno value
439  *
440  * Note: Only AF_INET client addresses are passed in, since gd_addr
441  * is the same size as a struct sockaddr_in.
442  */
443 static ssize_t write_getfd(struct file *file, char *buf, size_t size)
444 {
445         struct nfsctl_fdparm *data;
446         struct sockaddr_in *sin;
447         struct auth_domain *clp;
448         int err = 0;
449         struct knfsd_fh fh;
450         char *res;
451         struct in6_addr in6;
452
453         if (size < sizeof(*data))
454                 return -EINVAL;
455         data = (struct nfsctl_fdparm*)buf;
456         err = -EPROTONOSUPPORT;
457         if (data->gd_addr.sa_family != AF_INET)
458                 goto out;
459         err = -EINVAL;
460         if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS)
461                 goto out;
462
463         res = buf;
464         sin = (struct sockaddr_in *)&data->gd_addr;
465         exp_readlock();
466
467         ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6);
468
469         clp = auth_unix_lookup(&in6);
470         if (!clp)
471                 err = -EPERM;
472         else {
473                 err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE);
474                 auth_domain_put(clp);
475         }
476         exp_readunlock();
477
478         if (err == 0) {
479                 memset(res,0, NFS_FHSIZE);
480                 memcpy(res, &fh.fh_base, fh.fh_size);
481                 err = NFS_FHSIZE;
482         }
483  out:
484         return err;
485 }
486
487 /**
488  * write_unlock_ip - Release all locks used by a client
489  *
490  * Experimental.
491  *
492  * Input:
493  *                      buf:    '\n'-terminated C string containing a
494  *                              presentation format IP address
495  *                      size:   length of C string in @buf
496  * Output:
497  *      On success:     returns zero if all specified locks were released;
498  *                      returns one if one or more locks were not released
499  *      On error:       return code is negative errno value
500  */
501 static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size)
502 {
503         struct sockaddr_storage address;
504         struct sockaddr *sap = (struct sockaddr *)&address;
505         size_t salen = sizeof(address);
506         char *fo_path;
507
508         /* sanity check */
509         if (size == 0)
510                 return -EINVAL;
511
512         if (buf[size-1] != '\n')
513                 return -EINVAL;
514
515         fo_path = buf;
516         if (qword_get(&buf, fo_path, size) < 0)
517                 return -EINVAL;
518
519         if (rpc_pton(fo_path, size, sap, salen) == 0)
520                 return -EINVAL;
521
522         return nlmsvc_unlock_all_by_ip(sap);
523 }
524
525 /**
526  * write_unlock_fs - Release all locks on a local file system
527  *
528  * Experimental.
529  *
530  * Input:
531  *                      buf:    '\n'-terminated C string containing the
532  *                              absolute pathname of a local file system
533  *                      size:   length of C string in @buf
534  * Output:
535  *      On success:     returns zero if all specified locks were released;
536  *                      returns one if one or more locks were not released
537  *      On error:       return code is negative errno value
538  */
539 static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size)
540 {
541         struct path path;
542         char *fo_path;
543         int error;
544
545         /* sanity check */
546         if (size == 0)
547                 return -EINVAL;
548
549         if (buf[size-1] != '\n')
550                 return -EINVAL;
551
552         fo_path = buf;
553         if (qword_get(&buf, fo_path, size) < 0)
554                 return -EINVAL;
555
556         error = kern_path(fo_path, 0, &path);
557         if (error)
558                 return error;
559
560         /*
561          * XXX: Needs better sanity checking.  Otherwise we could end up
562          * releasing locks on the wrong file system.
563          *
564          * For example:
565          * 1.  Does the path refer to a directory?
566          * 2.  Is that directory a mount point, or
567          * 3.  Is that directory the root of an exported file system?
568          */
569         error = nlmsvc_unlock_all_by_sb(path.mnt->mnt_sb);
570
571         path_put(&path);
572         return error;
573 }
574
575 /**
576  * write_filehandle - Get a variable-length NFS file handle by path
577  *
578  * On input, the buffer contains a '\n'-terminated C string comprised of
579  * three alphanumeric words separated by whitespace.  The string may
580  * contain escape sequences.
581  *
582  * Input:
583  *                      buf:
584  *                              domain:         client domain name
585  *                              path:           export pathname
586  *                              maxsize:        numeric maximum size of
587  *                                              @buf
588  *                      size:   length of C string in @buf
589  * Output:
590  *      On success:     passed-in buffer filled with '\n'-terminated C
591  *                      string containing a ASCII hex text version
592  *                      of the NFS file handle;
593  *                      return code is the size in bytes of the string
594  *      On error:       return code is negative errno value
595  */
596 static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
597 {
598         char *dname, *path;
599         int uninitialized_var(maxsize);
600         char *mesg = buf;
601         int len;
602         struct auth_domain *dom;
603         struct knfsd_fh fh;
604
605         if (size == 0)
606                 return -EINVAL;
607
608         if (buf[size-1] != '\n')
609                 return -EINVAL;
610         buf[size-1] = 0;
611
612         dname = mesg;
613         len = qword_get(&mesg, dname, size);
614         if (len <= 0)
615                 return -EINVAL;
616         
617         path = dname+len+1;
618         len = qword_get(&mesg, path, size);
619         if (len <= 0)
620                 return -EINVAL;
621
622         len = get_int(&mesg, &maxsize);
623         if (len)
624                 return len;
625
626         if (maxsize < NFS_FHSIZE)
627                 return -EINVAL;
628         if (maxsize > NFS3_FHSIZE)
629                 maxsize = NFS3_FHSIZE;
630
631         if (qword_get(&mesg, mesg, size)>0)
632                 return -EINVAL;
633
634         /* we have all the words, they are in buf.. */
635         dom = unix_domain_find(dname);
636         if (!dom)
637                 return -ENOMEM;
638
639         len = exp_rootfh(dom, path, &fh,  maxsize);
640         auth_domain_put(dom);
641         if (len)
642                 return len;
643         
644         mesg = buf;
645         len = SIMPLE_TRANSACTION_LIMIT;
646         qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
647         mesg[-1] = '\n';
648         return mesg - buf;      
649 }
650
651 /**
652  * write_threads - Start NFSD, or report the current number of running threads
653  *
654  * Input:
655  *                      buf:            ignored
656  *                      size:           zero
657  * Output:
658  *      On success:     passed-in buffer filled with '\n'-terminated C
659  *                      string numeric value representing the number of
660  *                      running NFSD threads;
661  *                      return code is the size in bytes of the string
662  *      On error:       return code is zero
663  *
664  * OR
665  *
666  * Input:
667  *                      buf:            C string containing an unsigned
668  *                                      integer value representing the
669  *                                      number of NFSD threads to start
670  *                      size:           non-zero length of C string in @buf
671  * Output:
672  *      On success:     NFS service is started;
673  *                      passed-in buffer filled with '\n'-terminated C
674  *                      string numeric value representing the number of
675  *                      running NFSD threads;
676  *                      return code is the size in bytes of the string
677  *      On error:       return code is zero or a negative errno value
678  */
679 static ssize_t write_threads(struct file *file, char *buf, size_t size)
680 {
681         char *mesg = buf;
682         int rv;
683         if (size > 0) {
684                 int newthreads;
685                 rv = get_int(&mesg, &newthreads);
686                 if (rv)
687                         return rv;
688                 if (newthreads < 0)
689                         return -EINVAL;
690                 rv = nfsd_svc(NFS_PORT, newthreads);
691                 if (rv < 0)
692                         return rv;
693         } else
694                 rv = nfsd_nrthreads();
695
696         return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv);
697 }
698
699 /**
700  * write_pool_threads - Set or report the current number of threads per pool
701  *
702  * Input:
703  *                      buf:            ignored
704  *                      size:           zero
705  *
706  * OR
707  *
708  * Input:
709  *                      buf:            C string containing whitespace-
710  *                                      separated unsigned integer values
711  *                                      representing the number of NFSD
712  *                                      threads to start in each pool
713  *                      size:           non-zero length of C string in @buf
714  * Output:
715  *      On success:     passed-in buffer filled with '\n'-terminated C
716  *                      string containing integer values representing the
717  *                      number of NFSD threads in each pool;
718  *                      return code is the size in bytes of the string
719  *      On error:       return code is zero or a negative errno value
720  */
721 static ssize_t write_pool_threads(struct file *file, char *buf, size_t size)
722 {
723         /* if size > 0, look for an array of number of threads per node
724          * and apply them  then write out number of threads per node as reply
725          */
726         char *mesg = buf;
727         int i;
728         int rv;
729         int len;
730         int npools;
731         int *nthreads;
732
733         mutex_lock(&nfsd_mutex);
734         npools = nfsd_nrpools();
735         if (npools == 0) {
736                 /*
737                  * NFS is shut down.  The admin can start it by
738                  * writing to the threads file but NOT the pool_threads
739                  * file, sorry.  Report zero threads.
740                  */
741                 mutex_unlock(&nfsd_mutex);
742                 strcpy(buf, "0\n");
743                 return strlen(buf);
744         }
745
746         nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL);
747         rv = -ENOMEM;
748         if (nthreads == NULL)
749                 goto out_free;
750
751         if (size > 0) {
752                 for (i = 0; i < npools; i++) {
753                         rv = get_int(&mesg, &nthreads[i]);
754                         if (rv == -ENOENT)
755                                 break;          /* fewer numbers than pools */
756                         if (rv)
757                                 goto out_free;  /* syntax error */
758                         rv = -EINVAL;
759                         if (nthreads[i] < 0)
760                                 goto out_free;
761                 }
762                 rv = nfsd_set_nrthreads(i, nthreads);
763                 if (rv)
764                         goto out_free;
765         }
766
767         rv = nfsd_get_nrthreads(npools, nthreads);
768         if (rv)
769                 goto out_free;
770
771         mesg = buf;
772         size = SIMPLE_TRANSACTION_LIMIT;
773         for (i = 0; i < npools && size > 0; i++) {
774                 snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' '));
775                 len = strlen(mesg);
776                 size -= len;
777                 mesg += len;
778         }
779         rv = mesg - buf;
780 out_free:
781         kfree(nthreads);
782         mutex_unlock(&nfsd_mutex);
783         return rv;
784 }
785
786 static ssize_t __write_versions(struct file *file, char *buf, size_t size)
787 {
788         char *mesg = buf;
789         char *vers, *minorp, sign;
790         int len, num, remaining;
791         unsigned minor;
792         ssize_t tlen = 0;
793         char *sep;
794
795         if (size>0) {
796                 if (nfsd_serv)
797                         /* Cannot change versions without updating
798                          * nfsd_serv->sv_xdrsize, and reallocing
799                          * rq_argp and rq_resp
800                          */
801                         return -EBUSY;
802                 if (buf[size-1] != '\n')
803                         return -EINVAL;
804                 buf[size-1] = 0;
805
806                 vers = mesg;
807                 len = qword_get(&mesg, vers, size);
808                 if (len <= 0) return -EINVAL;
809                 do {
810                         sign = *vers;
811                         if (sign == '+' || sign == '-')
812                                 num = simple_strtol((vers+1), &minorp, 0);
813                         else
814                                 num = simple_strtol(vers, &minorp, 0);
815                         if (*minorp == '.') {
816                                 if (num < 4)
817                                         return -EINVAL;
818                                 minor = simple_strtoul(minorp+1, NULL, 0);
819                                 if (minor == 0)
820                                         return -EINVAL;
821                                 if (nfsd_minorversion(minor, sign == '-' ?
822                                                      NFSD_CLEAR : NFSD_SET) < 0)
823                                         return -EINVAL;
824                                 goto next;
825                         }
826                         switch(num) {
827                         case 2:
828                         case 3:
829                         case 4:
830                                 nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET);
831                                 break;
832                         default:
833                                 return -EINVAL;
834                         }
835                 next:
836                         vers += len + 1;
837                 } while ((len = qword_get(&mesg, vers, size)) > 0);
838                 /* If all get turned off, turn them back on, as
839                  * having no versions is BAD
840                  */
841                 nfsd_reset_versions();
842         }
843
844         /* Now write current state into reply buffer */
845         len = 0;
846         sep = "";
847         remaining = SIMPLE_TRANSACTION_LIMIT;
848         for (num=2 ; num <= 4 ; num++)
849                 if (nfsd_vers(num, NFSD_AVAIL)) {
850                         len = snprintf(buf, remaining, "%s%c%d", sep,
851                                        nfsd_vers(num, NFSD_TEST)?'+':'-',
852                                        num);
853                         sep = " ";
854
855                         if (len > remaining)
856                                 break;
857                         remaining -= len;
858                         buf += len;
859                         tlen += len;
860                 }
861         if (nfsd_vers(4, NFSD_AVAIL))
862                 for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION;
863                      minor++) {
864                         len = snprintf(buf, remaining, " %c4.%u",
865                                         (nfsd_vers(4, NFSD_TEST) &&
866                                          nfsd_minorversion(minor, NFSD_TEST)) ?
867                                                 '+' : '-',
868                                         minor);
869
870                         if (len > remaining)
871                                 break;
872                         remaining -= len;
873                         buf += len;
874                         tlen += len;
875                 }
876
877         len = snprintf(buf, remaining, "\n");
878         if (len > remaining)
879                 return -EINVAL;
880         return tlen + len;
881 }
882
883 /**
884  * write_versions - Set or report the available NFS protocol versions
885  *
886  * Input:
887  *                      buf:            ignored
888  *                      size:           zero
889  * Output:
890  *      On success:     passed-in buffer filled with '\n'-terminated C
891  *                      string containing positive or negative integer
892  *                      values representing the current status of each
893  *                      protocol version;
894  *                      return code is the size in bytes of the string
895  *      On error:       return code is zero or a negative errno value
896  *
897  * OR
898  *
899  * Input:
900  *                      buf:            C string containing whitespace-
901  *                                      separated positive or negative
902  *                                      integer values representing NFS
903  *                                      protocol versions to enable ("+n")
904  *                                      or disable ("-n")
905  *                      size:           non-zero length of C string in @buf
906  * Output:
907  *      On success:     status of zero or more protocol versions has
908  *                      been updated; passed-in buffer filled with
909  *                      '\n'-terminated C string containing positive
910  *                      or negative integer values representing the
911  *                      current status of each protocol version;
912  *                      return code is the size in bytes of the string
913  *      On error:       return code is zero or a negative errno value
914  */
915 static ssize_t write_versions(struct file *file, char *buf, size_t size)
916 {
917         ssize_t rv;
918
919         mutex_lock(&nfsd_mutex);
920         rv = __write_versions(file, buf, size);
921         mutex_unlock(&nfsd_mutex);
922         return rv;
923 }
924
925 /*
926  * Zero-length write.  Return a list of NFSD's current listener
927  * transports.
928  */
929 static ssize_t __write_ports_names(char *buf)
930 {
931         if (nfsd_serv == NULL)
932                 return 0;
933         return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT);
934 }
935
936 /*
937  * A single 'fd' number was written, in which case it must be for
938  * a socket of a supported family/protocol, and we use it as an
939  * nfsd listener.
940  */
941 static ssize_t __write_ports_addfd(char *buf)
942 {
943         char *mesg = buf;
944         int fd, err;
945
946         err = get_int(&mesg, &fd);
947         if (err != 0 || fd < 0)
948                 return -EINVAL;
949
950         err = nfsd_create_serv();
951         if (err != 0)
952                 return err;
953
954         err = lockd_up();
955         if (err != 0)
956                 goto out;
957
958         err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT);
959         if (err < 0)
960                 lockd_down();
961
962 out:
963         /* Decrease the count, but don't shut down the service */
964         nfsd_serv->sv_nrthreads--;
965         return err;
966 }
967
968 /*
969  * A '-' followed by the 'name' of a socket means we close the socket.
970  */
971 static ssize_t __write_ports_delfd(char *buf)
972 {
973         char *toclose;
974         int len = 0;
975
976         toclose = kstrdup(buf + 1, GFP_KERNEL);
977         if (toclose == NULL)
978                 return -ENOMEM;
979
980         if (nfsd_serv != NULL)
981                 len = svc_sock_names(nfsd_serv, buf,
982                                         SIMPLE_TRANSACTION_LIMIT, toclose);
983         if (len >= 0)
984                 lockd_down();
985
986         kfree(toclose);
987         return len;
988 }
989
990 /*
991  * A transport listener is added by writing it's transport name and
992  * a port number.
993  */
994 static ssize_t __write_ports_addxprt(char *buf)
995 {
996         char transport[16];
997         int port, err;
998
999         if (sscanf(buf, "%15s %4u", transport, &port) != 2)
1000                 return -EINVAL;
1001
1002         if (port < 1 || port > USHORT_MAX)
1003                 return -EINVAL;
1004
1005         err = nfsd_create_serv();
1006         if (err != 0)
1007                 return err;
1008
1009         err = svc_create_xprt(nfsd_serv, transport,
1010                                 PF_INET, port, SVC_SOCK_ANONYMOUS);
1011         if (err < 0) {
1012                 /* Give a reasonable perror msg for bad transport string */
1013                 if (err == -ENOENT)
1014                         err = -EPROTONOSUPPORT;
1015                 return err;
1016         }
1017         return 0;
1018 }
1019
1020 /*
1021  * A transport listener is removed by writing a "-", it's transport
1022  * name, and it's port number.
1023  */
1024 static ssize_t __write_ports_delxprt(char *buf)
1025 {
1026         struct svc_xprt *xprt;
1027         char transport[16];
1028         int port;
1029
1030         if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2)
1031                 return -EINVAL;
1032
1033         if (port < 1 || port > USHORT_MAX || nfsd_serv == NULL)
1034                 return -EINVAL;
1035
1036         xprt = svc_find_xprt(nfsd_serv, transport, AF_UNSPEC, port);
1037         if (xprt == NULL)
1038                 return -ENOTCONN;
1039
1040         svc_close_xprt(xprt);
1041         svc_xprt_put(xprt);
1042         return 0;
1043 }
1044
1045 static ssize_t __write_ports(struct file *file, char *buf, size_t size)
1046 {
1047         if (size == 0)
1048                 return __write_ports_names(buf);
1049
1050         if (isdigit(buf[0]))
1051                 return __write_ports_addfd(buf);
1052
1053         if (buf[0] == '-' && isdigit(buf[1]))
1054                 return __write_ports_delfd(buf);
1055
1056         if (isalpha(buf[0]))
1057                 return __write_ports_addxprt(buf);
1058
1059         if (buf[0] == '-' && isalpha(buf[1]))
1060                 return __write_ports_delxprt(buf);
1061
1062         return -EINVAL;
1063 }
1064
1065 /**
1066  * write_ports - Pass a socket file descriptor or transport name to listen on
1067  *
1068  * Input:
1069  *                      buf:            ignored
1070  *                      size:           zero
1071  * Output:
1072  *      On success:     passed-in buffer filled with a '\n'-terminated C
1073  *                      string containing a whitespace-separated list of
1074  *                      named NFSD listeners;
1075  *                      return code is the size in bytes of the string
1076  *      On error:       return code is zero or a negative errno value
1077  *
1078  * OR
1079  *
1080  * Input:
1081  *                      buf:            C string containing an unsigned
1082  *                                      integer value representing a bound
1083  *                                      but unconnected socket that is to be
1084  *                                      used as an NFSD listener; listen(3)
1085  *                                      must be called for a SOCK_STREAM
1086  *                                      socket, otherwise it is ignored
1087  *                      size:           non-zero length of C string in @buf
1088  * Output:
1089  *      On success:     NFS service is started;
1090  *                      passed-in buffer filled with a '\n'-terminated C
1091  *                      string containing a unique alphanumeric name of
1092  *                      the listener;
1093  *                      return code is the size in bytes of the string
1094  *      On error:       return code is a negative errno value
1095  *
1096  * OR
1097  *
1098  * Input:
1099  *                      buf:            C string containing a "-" followed
1100  *                                      by an integer value representing a
1101  *                                      previously passed in socket file
1102  *                                      descriptor
1103  *                      size:           non-zero length of C string in @buf
1104  * Output:
1105  *      On success:     NFS service no longer listens on that socket;
1106  *                      passed-in buffer filled with a '\n'-terminated C
1107  *                      string containing a unique name of the listener;
1108  *                      return code is the size in bytes of the string
1109  *      On error:       return code is a negative errno value
1110  *
1111  * OR
1112  *
1113  * Input:
1114  *                      buf:            C string containing a transport
1115  *                                      name and an unsigned integer value
1116  *                                      representing the port to listen on,
1117  *                                      separated by whitespace
1118  *                      size:           non-zero length of C string in @buf
1119  * Output:
1120  *      On success:     returns zero; NFS service is started
1121  *      On error:       return code is a negative errno value
1122  *
1123  * OR
1124  *
1125  * Input:
1126  *                      buf:            C string containing a "-" followed
1127  *                                      by a transport name and an unsigned
1128  *                                      integer value representing the port
1129  *                                      to listen on, separated by whitespace
1130  *                      size:           non-zero length of C string in @buf
1131  * Output:
1132  *      On success:     returns zero; NFS service no longer listens
1133  *                      on that transport
1134  *      On error:       return code is a negative errno value
1135  */
1136 static ssize_t write_ports(struct file *file, char *buf, size_t size)
1137 {
1138         ssize_t rv;
1139
1140         mutex_lock(&nfsd_mutex);
1141         rv = __write_ports(file, buf, size);
1142         mutex_unlock(&nfsd_mutex);
1143         return rv;
1144 }
1145
1146
1147 int nfsd_max_blksize;
1148
1149 /**
1150  * write_maxblksize - Set or report the current NFS blksize
1151  *
1152  * Input:
1153  *                      buf:            ignored
1154  *                      size:           zero
1155  *
1156  * OR
1157  *
1158  * Input:
1159  *                      buf:            C string containing an unsigned
1160  *                                      integer value representing the new
1161  *                                      NFS blksize
1162  *                      size:           non-zero length of C string in @buf
1163  * Output:
1164  *      On success:     passed-in buffer filled with '\n'-terminated C string
1165  *                      containing numeric value of the current NFS blksize
1166  *                      setting;
1167  *                      return code is the size in bytes of the string
1168  *      On error:       return code is zero or a negative errno value
1169  */
1170 static ssize_t write_maxblksize(struct file *file, char *buf, size_t size)
1171 {
1172         char *mesg = buf;
1173         if (size > 0) {
1174                 int bsize;
1175                 int rv = get_int(&mesg, &bsize);
1176                 if (rv)
1177                         return rv;
1178                 /* force bsize into allowed range and
1179                  * required alignment.
1180                  */
1181                 if (bsize < 1024)
1182                         bsize = 1024;
1183                 if (bsize > NFSSVC_MAXBLKSIZE)
1184                         bsize = NFSSVC_MAXBLKSIZE;
1185                 bsize &= ~(1024-1);
1186                 mutex_lock(&nfsd_mutex);
1187                 if (nfsd_serv && nfsd_serv->sv_nrthreads) {
1188                         mutex_unlock(&nfsd_mutex);
1189                         return -EBUSY;
1190                 }
1191                 nfsd_max_blksize = bsize;
1192                 mutex_unlock(&nfsd_mutex);
1193         }
1194
1195         return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n",
1196                                                         nfsd_max_blksize);
1197 }
1198
1199 #ifdef CONFIG_NFSD_V4
1200 extern time_t nfs4_leasetime(void);
1201
1202 static ssize_t __write_leasetime(struct file *file, char *buf, size_t size)
1203 {
1204         /* if size > 10 seconds, call
1205          * nfs4_reset_lease() then write out the new lease (seconds) as reply
1206          */
1207         char *mesg = buf;
1208         int rv, lease;
1209
1210         if (size > 0) {
1211                 if (nfsd_serv)
1212                         return -EBUSY;
1213                 rv = get_int(&mesg, &lease);
1214                 if (rv)
1215                         return rv;
1216                 if (lease < 10 || lease > 3600)
1217                         return -EINVAL;
1218                 nfs4_reset_lease(lease);
1219         }
1220
1221         return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n",
1222                                                         nfs4_lease_time());
1223 }
1224
1225 /**
1226  * write_leasetime - Set or report the current NFSv4 lease time
1227  *
1228  * Input:
1229  *                      buf:            ignored
1230  *                      size:           zero
1231  *
1232  * OR
1233  *
1234  * Input:
1235  *                      buf:            C string containing an unsigned
1236  *                                      integer value representing the new
1237  *                                      NFSv4 lease expiry time
1238  *                      size:           non-zero length of C string in @buf
1239  * Output:
1240  *      On success:     passed-in buffer filled with '\n'-terminated C
1241  *                      string containing unsigned integer value of the
1242  *                      current lease expiry time;
1243  *                      return code is the size in bytes of the string
1244  *      On error:       return code is zero or a negative errno value
1245  */
1246 static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
1247 {
1248         ssize_t rv;
1249
1250         mutex_lock(&nfsd_mutex);
1251         rv = __write_leasetime(file, buf, size);
1252         mutex_unlock(&nfsd_mutex);
1253         return rv;
1254 }
1255
1256 extern char *nfs4_recoverydir(void);
1257
1258 static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size)
1259 {
1260         char *mesg = buf;
1261         char *recdir;
1262         int len, status;
1263
1264         if (size > 0) {
1265                 if (nfsd_serv)
1266                         return -EBUSY;
1267                 if (size > PATH_MAX || buf[size-1] != '\n')
1268                         return -EINVAL;
1269                 buf[size-1] = 0;
1270
1271                 recdir = mesg;
1272                 len = qword_get(&mesg, recdir, size);
1273                 if (len <= 0)
1274                         return -EINVAL;
1275
1276                 status = nfs4_reset_recoverydir(recdir);
1277         }
1278
1279         return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n",
1280                                                         nfs4_recoverydir());
1281 }
1282
1283 /**
1284  * write_recoverydir - Set or report the pathname of the recovery directory
1285  *
1286  * Input:
1287  *                      buf:            ignored
1288  *                      size:           zero
1289  *
1290  * OR
1291  *
1292  * Input:
1293  *                      buf:            C string containing the pathname
1294  *                                      of the directory on a local file
1295  *                                      system containing permanent NFSv4
1296  *                                      recovery data
1297  *                      size:           non-zero length of C string in @buf
1298  * Output:
1299  *      On success:     passed-in buffer filled with '\n'-terminated C string
1300  *                      containing the current recovery pathname setting;
1301  *                      return code is the size in bytes of the string
1302  *      On error:       return code is zero or a negative errno value
1303  */
1304 static ssize_t write_recoverydir(struct file *file, char *buf, size_t size)
1305 {
1306         ssize_t rv;
1307
1308         mutex_lock(&nfsd_mutex);
1309         rv = __write_recoverydir(file, buf, size);
1310         mutex_unlock(&nfsd_mutex);
1311         return rv;
1312 }
1313
1314 #endif
1315
1316 /*----------------------------------------------------------------------------*/
1317 /*
1318  *      populating the filesystem.
1319  */
1320
1321 static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
1322 {
1323         static struct tree_descr nfsd_files[] = {
1324                 [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR},
1325                 [NFSD_Add] = {".add", &transaction_ops, S_IWUSR},
1326                 [NFSD_Del] = {".del", &transaction_ops, S_IWUSR},
1327                 [NFSD_Export] = {".export", &transaction_ops, S_IWUSR},
1328                 [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR},
1329                 [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR},
1330                 [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR},
1331                 [NFSD_List] = {"exports", &exports_operations, S_IRUGO},
1332                 [NFSD_FO_UnlockIP] = {"unlock_ip",
1333                                         &transaction_ops, S_IWUSR|S_IRUSR},
1334                 [NFSD_FO_UnlockFS] = {"unlock_filesystem",
1335                                         &transaction_ops, S_IWUSR|S_IRUSR},
1336                 [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR},
1337                 [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
1338                 [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR},
1339                 [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO},
1340                 [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR},
1341                 [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO},
1342                 [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO},
1343 #ifdef CONFIG_NFSD_V4
1344                 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR},
1345                 [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR},
1346 #endif
1347                 /* last one */ {""}
1348         };
1349         return simple_fill_super(sb, 0x6e667364, nfsd_files);
1350 }
1351
1352 static int nfsd_get_sb(struct file_system_type *fs_type,
1353         int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1354 {
1355         return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt);
1356 }
1357
1358 static struct file_system_type nfsd_fs_type = {
1359         .owner          = THIS_MODULE,
1360         .name           = "nfsd",
1361         .get_sb         = nfsd_get_sb,
1362         .kill_sb        = kill_litter_super,
1363 };
1364
1365 #ifdef CONFIG_PROC_FS
1366 static int create_proc_exports_entry(void)
1367 {
1368         struct proc_dir_entry *entry;
1369
1370         entry = proc_mkdir("fs/nfs", NULL);
1371         if (!entry)
1372                 return -ENOMEM;
1373         entry = proc_create("exports", 0, entry, &exports_operations);
1374         if (!entry)
1375                 return -ENOMEM;
1376         return 0;
1377 }
1378 #else /* CONFIG_PROC_FS */
1379 static int create_proc_exports_entry(void)
1380 {
1381         return 0;
1382 }
1383 #endif
1384
1385 static int __init init_nfsd(void)
1386 {
1387         int retval;
1388         printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
1389
1390         retval = nfs4_state_init(); /* nfs4 locking state */
1391         if (retval)
1392                 return retval;
1393         nfsd_stat_init();       /* Statistics */
1394         retval = nfsd_reply_cache_init();
1395         if (retval)
1396                 goto out_free_stat;
1397         retval = nfsd_export_init();
1398         if (retval)
1399                 goto out_free_cache;
1400         nfsd_lockd_init();      /* lockd->nfsd callbacks */
1401         retval = nfsd_idmap_init();
1402         if (retval)
1403                 goto out_free_lockd;
1404         retval = create_proc_exports_entry();
1405         if (retval)
1406                 goto out_free_idmap;
1407         retval = register_filesystem(&nfsd_fs_type);
1408         if (retval)
1409                 goto out_free_all;
1410         return 0;
1411 out_free_all:
1412         remove_proc_entry("fs/nfs/exports", NULL);
1413         remove_proc_entry("fs/nfs", NULL);
1414 out_free_idmap:
1415         nfsd_idmap_shutdown();
1416 out_free_lockd:
1417         nfsd_lockd_shutdown();
1418         nfsd_export_shutdown();
1419 out_free_cache:
1420         nfsd_reply_cache_shutdown();
1421 out_free_stat:
1422         nfsd_stat_shutdown();
1423         nfsd4_free_slabs();
1424         return retval;
1425 }
1426
1427 static void __exit exit_nfsd(void)
1428 {
1429         nfsd_export_shutdown();
1430         nfsd_reply_cache_shutdown();
1431         remove_proc_entry("fs/nfs/exports", NULL);
1432         remove_proc_entry("fs/nfs", NULL);
1433         nfsd_stat_shutdown();
1434         nfsd_lockd_shutdown();
1435         nfsd_idmap_shutdown();
1436         nfsd4_free_slabs();
1437         unregister_filesystem(&nfsd_fs_type);
1438 }
1439
1440 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1441 MODULE_LICENSE("GPL");
1442 module_init(init_nfsd)
1443 module_exit(exit_nfsd)