Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[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/inet.h>
26 #include <linux/string.h>
27 #include <linux/smp_lock.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
41 #include <asm/uaccess.h>
42 #include <net/ipv6.h>
43
44 /*
45  *      We have a single directory with 9 nodes in it.
46  */
47 enum {
48         NFSD_Root = 1,
49         NFSD_Svc,
50         NFSD_Add,
51         NFSD_Del,
52         NFSD_Export,
53         NFSD_Unexport,
54         NFSD_Getfd,
55         NFSD_Getfs,
56         NFSD_List,
57         NFSD_Fh,
58         NFSD_FO_UnlockIP,
59         NFSD_FO_UnlockFS,
60         NFSD_Threads,
61         NFSD_Pool_Threads,
62         NFSD_Versions,
63         NFSD_Ports,
64         NFSD_MaxBlkSize,
65         /*
66          * The below MUST come last.  Otherwise we leave a hole in nfsd_files[]
67          * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops
68          */
69 #ifdef CONFIG_NFSD_V4
70         NFSD_Leasetime,
71         NFSD_RecoveryDir,
72 #endif
73 };
74
75 /*
76  * write() for these nodes.
77  */
78 static ssize_t write_svc(struct file *file, char *buf, size_t size);
79 static ssize_t write_add(struct file *file, char *buf, size_t size);
80 static ssize_t write_del(struct file *file, char *buf, size_t size);
81 static ssize_t write_export(struct file *file, char *buf, size_t size);
82 static ssize_t write_unexport(struct file *file, char *buf, size_t size);
83 static ssize_t write_getfd(struct file *file, char *buf, size_t size);
84 static ssize_t write_getfs(struct file *file, char *buf, size_t size);
85 static ssize_t write_filehandle(struct file *file, char *buf, size_t size);
86 static ssize_t write_threads(struct file *file, char *buf, size_t size);
87 static ssize_t write_pool_threads(struct file *file, char *buf, size_t size);
88 static ssize_t write_versions(struct file *file, char *buf, size_t size);
89 static ssize_t write_ports(struct file *file, char *buf, size_t size);
90 static ssize_t write_maxblksize(struct file *file, char *buf, size_t size);
91 #ifdef CONFIG_NFSD_V4
92 static ssize_t write_leasetime(struct file *file, char *buf, size_t size);
93 static ssize_t write_recoverydir(struct file *file, char *buf, size_t size);
94 #endif
95
96 static ssize_t failover_unlock_ip(struct file *file, char *buf, size_t size);
97 static ssize_t failover_unlock_fs(struct file *file, char *buf, size_t size);
98
99 static ssize_t (*write_op[])(struct file *, char *, size_t) = {
100         [NFSD_Svc] = write_svc,
101         [NFSD_Add] = write_add,
102         [NFSD_Del] = write_del,
103         [NFSD_Export] = write_export,
104         [NFSD_Unexport] = write_unexport,
105         [NFSD_Getfd] = write_getfd,
106         [NFSD_Getfs] = write_getfs,
107         [NFSD_Fh] = write_filehandle,
108         [NFSD_FO_UnlockIP] = failover_unlock_ip,
109         [NFSD_FO_UnlockFS] = failover_unlock_fs,
110         [NFSD_Threads] = write_threads,
111         [NFSD_Pool_Threads] = write_pool_threads,
112         [NFSD_Versions] = write_versions,
113         [NFSD_Ports] = write_ports,
114         [NFSD_MaxBlkSize] = write_maxblksize,
115 #ifdef CONFIG_NFSD_V4
116         [NFSD_Leasetime] = write_leasetime,
117         [NFSD_RecoveryDir] = write_recoverydir,
118 #endif
119 };
120
121 static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
122 {
123         ino_t ino =  file->f_path.dentry->d_inode->i_ino;
124         char *data;
125         ssize_t rv;
126
127         if (ino >= ARRAY_SIZE(write_op) || !write_op[ino])
128                 return -EINVAL;
129
130         data = simple_transaction_get(file, buf, size);
131         if (IS_ERR(data))
132                 return PTR_ERR(data);
133
134         rv =  write_op[ino](file, data, size);
135         if (rv >= 0) {
136                 simple_transaction_set(file, rv);
137                 rv = size;
138         }
139         return rv;
140 }
141
142 static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos)
143 {
144         if (! file->private_data) {
145                 /* An attempt to read a transaction file without writing
146                  * causes a 0-byte write so that the file can return
147                  * state information
148                  */
149                 ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos);
150                 if (rv < 0)
151                         return rv;
152         }
153         return simple_transaction_read(file, buf, size, pos);
154 }
155
156 static const struct file_operations transaction_ops = {
157         .write          = nfsctl_transaction_write,
158         .read           = nfsctl_transaction_read,
159         .release        = simple_transaction_release,
160 };
161
162 static int exports_open(struct inode *inode, struct file *file)
163 {
164         return seq_open(file, &nfs_exports_op);
165 }
166
167 static const struct file_operations exports_operations = {
168         .open           = exports_open,
169         .read           = seq_read,
170         .llseek         = seq_lseek,
171         .release        = seq_release,
172 };
173
174 /*----------------------------------------------------------------------------*/
175 /*
176  * payload - write methods
177  * If the method has a response, the response should be put in buf,
178  * and the length returned.  Otherwise return 0 or and -error.
179  */
180
181 static ssize_t write_svc(struct file *file, char *buf, size_t size)
182 {
183         struct nfsctl_svc *data;
184         if (size < sizeof(*data))
185                 return -EINVAL;
186         data = (struct nfsctl_svc*) buf;
187         return nfsd_svc(data->svc_port, data->svc_nthreads);
188 }
189
190 static ssize_t write_add(struct file *file, char *buf, size_t size)
191 {
192         struct nfsctl_client *data;
193         if (size < sizeof(*data))
194                 return -EINVAL;
195         data = (struct nfsctl_client *)buf;
196         return exp_addclient(data);
197 }
198
199 static ssize_t write_del(struct file *file, char *buf, size_t size)
200 {
201         struct nfsctl_client *data;
202         if (size < sizeof(*data))
203                 return -EINVAL;
204         data = (struct nfsctl_client *)buf;
205         return exp_delclient(data);
206 }
207
208 static ssize_t write_export(struct file *file, char *buf, size_t size)
209 {
210         struct nfsctl_export *data;
211         if (size < sizeof(*data))
212                 return -EINVAL;
213         data = (struct nfsctl_export*)buf;
214         return exp_export(data);
215 }
216
217 static ssize_t write_unexport(struct file *file, char *buf, size_t size)
218 {
219         struct nfsctl_export *data;
220
221         if (size < sizeof(*data))
222                 return -EINVAL;
223         data = (struct nfsctl_export*)buf;
224         return exp_unexport(data);
225 }
226
227 static ssize_t write_getfs(struct file *file, char *buf, size_t size)
228 {
229         struct nfsctl_fsparm *data;
230         struct sockaddr_in *sin;
231         struct auth_domain *clp;
232         int err = 0;
233         struct knfsd_fh *res;
234         struct in6_addr in6;
235
236         if (size < sizeof(*data))
237                 return -EINVAL;
238         data = (struct nfsctl_fsparm*)buf;
239         err = -EPROTONOSUPPORT;
240         if (data->gd_addr.sa_family != AF_INET)
241                 goto out;
242         sin = (struct sockaddr_in *)&data->gd_addr;
243         if (data->gd_maxlen > NFS3_FHSIZE)
244                 data->gd_maxlen = NFS3_FHSIZE;
245
246         res = (struct knfsd_fh*)buf;
247
248         exp_readlock();
249
250         ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6);
251
252         clp = auth_unix_lookup(&in6);
253         if (!clp)
254                 err = -EPERM;
255         else {
256                 err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen);
257                 auth_domain_put(clp);
258         }
259         exp_readunlock();
260         if (err == 0)
261                 err = res->fh_size + offsetof(struct knfsd_fh, fh_base);
262  out:
263         return err;
264 }
265
266 static ssize_t write_getfd(struct file *file, char *buf, size_t size)
267 {
268         struct nfsctl_fdparm *data;
269         struct sockaddr_in *sin;
270         struct auth_domain *clp;
271         int err = 0;
272         struct knfsd_fh fh;
273         char *res;
274         struct in6_addr in6;
275
276         if (size < sizeof(*data))
277                 return -EINVAL;
278         data = (struct nfsctl_fdparm*)buf;
279         err = -EPROTONOSUPPORT;
280         if (data->gd_addr.sa_family != AF_INET)
281                 goto out;
282         err = -EINVAL;
283         if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS)
284                 goto out;
285
286         res = buf;
287         sin = (struct sockaddr_in *)&data->gd_addr;
288         exp_readlock();
289
290         ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6);
291
292         clp = auth_unix_lookup(&in6);
293         if (!clp)
294                 err = -EPERM;
295         else {
296                 err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE);
297                 auth_domain_put(clp);
298         }
299         exp_readunlock();
300
301         if (err == 0) {
302                 memset(res,0, NFS_FHSIZE);
303                 memcpy(res, &fh.fh_base, fh.fh_size);
304                 err = NFS_FHSIZE;
305         }
306  out:
307         return err;
308 }
309
310 static ssize_t failover_unlock_ip(struct file *file, char *buf, size_t size)
311 {
312         __be32 server_ip;
313         char *fo_path, c;
314         int b1, b2, b3, b4;
315
316         /* sanity check */
317         if (size == 0)
318                 return -EINVAL;
319
320         if (buf[size-1] != '\n')
321                 return -EINVAL;
322
323         fo_path = buf;
324         if (qword_get(&buf, fo_path, size) < 0)
325                 return -EINVAL;
326
327         /* get ipv4 address */
328         if (sscanf(fo_path, "%u.%u.%u.%u%c", &b1, &b2, &b3, &b4, &c) != 4)
329                 return -EINVAL;
330         server_ip = htonl((((((b1<<8)|b2)<<8)|b3)<<8)|b4);
331
332         return nlmsvc_unlock_all_by_ip(server_ip);
333 }
334
335 static ssize_t failover_unlock_fs(struct file *file, char *buf, size_t size)
336 {
337         struct nameidata nd;
338         char *fo_path;
339         int error;
340
341         /* sanity check */
342         if (size == 0)
343                 return -EINVAL;
344
345         if (buf[size-1] != '\n')
346                 return -EINVAL;
347
348         fo_path = buf;
349         if (qword_get(&buf, fo_path, size) < 0)
350                 return -EINVAL;
351
352         error = path_lookup(fo_path, 0, &nd);
353         if (error)
354                 return error;
355
356         error = nlmsvc_unlock_all_by_sb(nd.path.mnt->mnt_sb);
357
358         path_put(&nd.path);
359         return error;
360 }
361
362 static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
363 {
364         /* request is:
365          *   domain path maxsize
366          * response is
367          *   filehandle
368          *
369          * qword quoting is used, so filehandle will be \x....
370          */
371         char *dname, *path;
372         int uninitialized_var(maxsize);
373         char *mesg = buf;
374         int len;
375         struct auth_domain *dom;
376         struct knfsd_fh fh;
377
378         if (size == 0)
379                 return -EINVAL;
380
381         if (buf[size-1] != '\n')
382                 return -EINVAL;
383         buf[size-1] = 0;
384
385         dname = mesg;
386         len = qword_get(&mesg, dname, size);
387         if (len <= 0) return -EINVAL;
388         
389         path = dname+len+1;
390         len = qword_get(&mesg, path, size);
391         if (len <= 0) return -EINVAL;
392
393         len = get_int(&mesg, &maxsize);
394         if (len)
395                 return len;
396
397         if (maxsize < NFS_FHSIZE)
398                 return -EINVAL;
399         if (maxsize > NFS3_FHSIZE)
400                 maxsize = NFS3_FHSIZE;
401
402         if (qword_get(&mesg, mesg, size)>0)
403                 return -EINVAL;
404
405         /* we have all the words, they are in buf.. */
406         dom = unix_domain_find(dname);
407         if (!dom)
408                 return -ENOMEM;
409
410         len = exp_rootfh(dom, path, &fh,  maxsize);
411         auth_domain_put(dom);
412         if (len)
413                 return len;
414         
415         mesg = buf; len = SIMPLE_TRANSACTION_LIMIT;
416         qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
417         mesg[-1] = '\n';
418         return mesg - buf;      
419 }
420
421 static ssize_t write_threads(struct file *file, char *buf, size_t size)
422 {
423         /* if size > 0, look for a number of threads and call nfsd_svc
424          * then write out number of threads as reply
425          */
426         char *mesg = buf;
427         int rv;
428         if (size > 0) {
429                 int newthreads;
430                 rv = get_int(&mesg, &newthreads);
431                 if (rv)
432                         return rv;
433                 if (newthreads <0)
434                         return -EINVAL;
435                 rv = nfsd_svc(2049, newthreads);
436                 if (rv)
437                         return rv;
438         }
439         sprintf(buf, "%d\n", nfsd_nrthreads());
440         return strlen(buf);
441 }
442
443 static ssize_t write_pool_threads(struct file *file, char *buf, size_t size)
444 {
445         /* if size > 0, look for an array of number of threads per node
446          * and apply them  then write out number of threads per node as reply
447          */
448         char *mesg = buf;
449         int i;
450         int rv;
451         int len;
452         int npools = nfsd_nrpools();
453         int *nthreads;
454
455         if (npools == 0) {
456                 /*
457                  * NFS is shut down.  The admin can start it by
458                  * writing to the threads file but NOT the pool_threads
459                  * file, sorry.  Report zero threads.
460                  */
461                 strcpy(buf, "0\n");
462                 return strlen(buf);
463         }
464
465         nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL);
466         if (nthreads == NULL)
467                 return -ENOMEM;
468
469         if (size > 0) {
470                 for (i = 0; i < npools; i++) {
471                         rv = get_int(&mesg, &nthreads[i]);
472                         if (rv == -ENOENT)
473                                 break;          /* fewer numbers than pools */
474                         if (rv)
475                                 goto out_free;  /* syntax error */
476                         rv = -EINVAL;
477                         if (nthreads[i] < 0)
478                                 goto out_free;
479                 }
480                 rv = nfsd_set_nrthreads(i, nthreads);
481                 if (rv)
482                         goto out_free;
483         }
484
485         rv = nfsd_get_nrthreads(npools, nthreads);
486         if (rv)
487                 goto out_free;
488
489         mesg = buf;
490         size = SIMPLE_TRANSACTION_LIMIT;
491         for (i = 0; i < npools && size > 0; i++) {
492                 snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' '));
493                 len = strlen(mesg);
494                 size -= len;
495                 mesg += len;
496         }
497
498         return (mesg-buf);
499
500 out_free:
501         kfree(nthreads);
502         return rv;
503 }
504
505 static ssize_t write_versions(struct file *file, char *buf, size_t size)
506 {
507         /*
508          * Format:
509          *   [-/+]vers [-/+]vers ...
510          */
511         char *mesg = buf;
512         char *vers, sign;
513         int len, num;
514         ssize_t tlen = 0;
515         char *sep;
516
517         if (size>0) {
518                 if (nfsd_serv)
519                         /* Cannot change versions without updating
520                          * nfsd_serv->sv_xdrsize, and reallocing
521                          * rq_argp and rq_resp
522                          */
523                         return -EBUSY;
524                 if (buf[size-1] != '\n')
525                         return -EINVAL;
526                 buf[size-1] = 0;
527
528                 vers = mesg;
529                 len = qword_get(&mesg, vers, size);
530                 if (len <= 0) return -EINVAL;
531                 do {
532                         sign = *vers;
533                         if (sign == '+' || sign == '-')
534                                 num = simple_strtol((vers+1), NULL, 0);
535                         else
536                                 num = simple_strtol(vers, NULL, 0);
537                         switch(num) {
538                         case 2:
539                         case 3:
540                         case 4:
541                                 nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET);
542                                 break;
543                         default:
544                                 return -EINVAL;
545                         }
546                         vers += len + 1;
547                         tlen += len;
548                 } while ((len = qword_get(&mesg, vers, size)) > 0);
549                 /* If all get turned off, turn them back on, as
550                  * having no versions is BAD
551                  */
552                 nfsd_reset_versions();
553         }
554         /* Now write current state into reply buffer */
555         len = 0;
556         sep = "";
557         for (num=2 ; num <= 4 ; num++)
558                 if (nfsd_vers(num, NFSD_AVAIL)) {
559                         len += sprintf(buf+len, "%s%c%d", sep,
560                                        nfsd_vers(num, NFSD_TEST)?'+':'-',
561                                        num);
562                         sep = " ";
563                 }
564         len += sprintf(buf+len, "\n");
565         return len;
566 }
567
568 static ssize_t write_ports(struct file *file, char *buf, size_t size)
569 {
570         if (size == 0) {
571                 int len = 0;
572                 lock_kernel();
573                 if (nfsd_serv)
574                         len = svc_xprt_names(nfsd_serv, buf, 0);
575                 unlock_kernel();
576                 return len;
577         }
578         /* Either a single 'fd' number is written, in which
579          * case it must be for a socket of a supported family/protocol,
580          * and we use it as an nfsd socket, or
581          * A '-' followed by the 'name' of a socket in which case
582          * we close the socket.
583          */
584         if (isdigit(buf[0])) {
585                 char *mesg = buf;
586                 int fd;
587                 int err;
588                 err = get_int(&mesg, &fd);
589                 if (err)
590                         return -EINVAL;
591                 if (fd < 0)
592                         return -EINVAL;
593                 err = nfsd_create_serv();
594                 if (!err) {
595                         int proto = 0;
596                         err = svc_addsock(nfsd_serv, fd, buf, &proto);
597                         if (err >= 0) {
598                                 err = lockd_up(proto);
599                                 if (err < 0)
600                                         svc_sock_names(buf+strlen(buf)+1, nfsd_serv, buf);
601                         }
602                         /* Decrease the count, but don't shutdown the
603                          * the service
604                          */
605                         lock_kernel();
606                         nfsd_serv->sv_nrthreads--;
607                         unlock_kernel();
608                 }
609                 return err < 0 ? err : 0;
610         }
611         if (buf[0] == '-' && isdigit(buf[1])) {
612                 char *toclose = kstrdup(buf+1, GFP_KERNEL);
613                 int len = 0;
614                 if (!toclose)
615                         return -ENOMEM;
616                 lock_kernel();
617                 if (nfsd_serv)
618                         len = svc_sock_names(buf, nfsd_serv, toclose);
619                 unlock_kernel();
620                 if (len >= 0)
621                         lockd_down();
622                 kfree(toclose);
623                 return len;
624         }
625         /*
626          * Add a transport listener by writing it's transport name
627          */
628         if (isalpha(buf[0])) {
629                 int err;
630                 char transport[16];
631                 int port;
632                 if (sscanf(buf, "%15s %4d", transport, &port) == 2) {
633                         err = nfsd_create_serv();
634                         if (!err) {
635                                 err = svc_create_xprt(nfsd_serv,
636                                                       transport, port,
637                                                       SVC_SOCK_ANONYMOUS);
638                                 if (err == -ENOENT)
639                                         /* Give a reasonable perror msg for
640                                          * bad transport string */
641                                         err = -EPROTONOSUPPORT;
642                         }
643                         return err < 0 ? err : 0;
644                 }
645         }
646         /*
647          * Remove a transport by writing it's transport name and port number
648          */
649         if (buf[0] == '-' && isalpha(buf[1])) {
650                 struct svc_xprt *xprt;
651                 int err = -EINVAL;
652                 char transport[16];
653                 int port;
654                 if (sscanf(&buf[1], "%15s %4d", transport, &port) == 2) {
655                         if (port == 0)
656                                 return -EINVAL;
657                         lock_kernel();
658                         if (nfsd_serv) {
659                                 xprt = svc_find_xprt(nfsd_serv, transport,
660                                                      AF_UNSPEC, port);
661                                 if (xprt) {
662                                         svc_close_xprt(xprt);
663                                         svc_xprt_put(xprt);
664                                         err = 0;
665                                 } else
666                                         err = -ENOTCONN;
667                         }
668                         unlock_kernel();
669                         return err < 0 ? err : 0;
670                 }
671         }
672         return -EINVAL;
673 }
674
675 int nfsd_max_blksize;
676
677 static ssize_t write_maxblksize(struct file *file, char *buf, size_t size)
678 {
679         char *mesg = buf;
680         if (size > 0) {
681                 int bsize;
682                 int rv = get_int(&mesg, &bsize);
683                 if (rv)
684                         return rv;
685                 /* force bsize into allowed range and
686                  * required alignment.
687                  */
688                 if (bsize < 1024)
689                         bsize = 1024;
690                 if (bsize > NFSSVC_MAXBLKSIZE)
691                         bsize = NFSSVC_MAXBLKSIZE;
692                 bsize &= ~(1024-1);
693                 lock_kernel();
694                 if (nfsd_serv && nfsd_serv->sv_nrthreads) {
695                         unlock_kernel();
696                         return -EBUSY;
697                 }
698                 nfsd_max_blksize = bsize;
699                 unlock_kernel();
700         }
701         return sprintf(buf, "%d\n", nfsd_max_blksize);
702 }
703
704 #ifdef CONFIG_NFSD_V4
705 extern time_t nfs4_leasetime(void);
706
707 static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
708 {
709         /* if size > 10 seconds, call
710          * nfs4_reset_lease() then write out the new lease (seconds) as reply
711          */
712         char *mesg = buf;
713         int rv;
714
715         if (size > 0) {
716                 int lease;
717                 rv = get_int(&mesg, &lease);
718                 if (rv)
719                         return rv;
720                 if (lease < 10 || lease > 3600)
721                         return -EINVAL;
722                 nfs4_reset_lease(lease);
723         }
724         sprintf(buf, "%ld\n", nfs4_lease_time());
725         return strlen(buf);
726 }
727
728 static ssize_t write_recoverydir(struct file *file, char *buf, size_t size)
729 {
730         char *mesg = buf;
731         char *recdir;
732         int len, status;
733
734         if (size == 0 || size > PATH_MAX || buf[size-1] != '\n')
735                 return -EINVAL;
736         buf[size-1] = 0;
737
738         recdir = mesg;
739         len = qword_get(&mesg, recdir, size);
740         if (len <= 0)
741                 return -EINVAL;
742
743         status = nfs4_reset_recoverydir(recdir);
744         return strlen(buf);
745 }
746 #endif
747
748 /*----------------------------------------------------------------------------*/
749 /*
750  *      populating the filesystem.
751  */
752
753 static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
754 {
755         static struct tree_descr nfsd_files[] = {
756                 [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR},
757                 [NFSD_Add] = {".add", &transaction_ops, S_IWUSR},
758                 [NFSD_Del] = {".del", &transaction_ops, S_IWUSR},
759                 [NFSD_Export] = {".export", &transaction_ops, S_IWUSR},
760                 [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR},
761                 [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR},
762                 [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR},
763                 [NFSD_List] = {"exports", &exports_operations, S_IRUGO},
764                 [NFSD_FO_UnlockIP] = {"unlock_ip",
765                                         &transaction_ops, S_IWUSR|S_IRUSR},
766                 [NFSD_FO_UnlockFS] = {"unlock_filesystem",
767                                         &transaction_ops, S_IWUSR|S_IRUSR},
768                 [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR},
769                 [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
770                 [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR},
771                 [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR},
772                 [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO},
773                 [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO},
774 #ifdef CONFIG_NFSD_V4
775                 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR},
776                 [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR},
777 #endif
778                 /* last one */ {""}
779         };
780         return simple_fill_super(sb, 0x6e667364, nfsd_files);
781 }
782
783 static int nfsd_get_sb(struct file_system_type *fs_type,
784         int flags, const char *dev_name, void *data, struct vfsmount *mnt)
785 {
786         return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt);
787 }
788
789 static struct file_system_type nfsd_fs_type = {
790         .owner          = THIS_MODULE,
791         .name           = "nfsd",
792         .get_sb         = nfsd_get_sb,
793         .kill_sb        = kill_litter_super,
794 };
795
796 #ifdef CONFIG_PROC_FS
797 static int create_proc_exports_entry(void)
798 {
799         struct proc_dir_entry *entry;
800
801         entry = proc_mkdir("fs/nfs", NULL);
802         if (!entry)
803                 return -ENOMEM;
804         entry = create_proc_entry("fs/nfs/exports", 0, NULL);
805         if (!entry)
806                 return -ENOMEM;
807         entry->proc_fops =  &exports_operations;
808         return 0;
809 }
810 #else /* CONFIG_PROC_FS */
811 static int create_proc_exports_entry(void)
812 {
813         return 0;
814 }
815 #endif
816
817 static int __init init_nfsd(void)
818 {
819         int retval;
820         printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
821
822         retval = nfs4_state_init(); /* nfs4 locking state */
823         if (retval)
824                 return retval;
825         nfsd_stat_init();       /* Statistics */
826         retval = nfsd_reply_cache_init();
827         if (retval)
828                 goto out_free_stat;
829         retval = nfsd_export_init();
830         if (retval)
831                 goto out_free_cache;
832         nfsd_lockd_init();      /* lockd->nfsd callbacks */
833         retval = nfsd_idmap_init();
834         if (retval)
835                 goto out_free_lockd;
836         retval = create_proc_exports_entry();
837         if (retval)
838                 goto out_free_idmap;
839         retval = register_filesystem(&nfsd_fs_type);
840         if (retval)
841                 goto out_free_all;
842         return 0;
843 out_free_all:
844         remove_proc_entry("fs/nfs/exports", NULL);
845         remove_proc_entry("fs/nfs", NULL);
846 out_free_idmap:
847         nfsd_idmap_shutdown();
848 out_free_lockd:
849         nfsd_lockd_shutdown();
850         nfsd_export_shutdown();
851 out_free_cache:
852         nfsd_reply_cache_shutdown();
853 out_free_stat:
854         nfsd_stat_shutdown();
855         nfsd4_free_slabs();
856         return retval;
857 }
858
859 static void __exit exit_nfsd(void)
860 {
861         nfsd_export_shutdown();
862         nfsd_reply_cache_shutdown();
863         remove_proc_entry("fs/nfs/exports", NULL);
864         remove_proc_entry("fs/nfs", NULL);
865         nfsd_stat_shutdown();
866         nfsd_lockd_shutdown();
867         nfsd_idmap_shutdown();
868         nfsd4_free_slabs();
869         unregister_filesystem(&nfsd_fs_type);
870 }
871
872 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
873 MODULE_LICENSE("GPL");
874 module_init(init_nfsd)
875 module_exit(exit_nfsd)