blob: eedf2e3990a9a8f3d0bdad85faa119f4eef4ef97 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#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>
NeilBrown70c3b762005-11-07 01:00:25 -080025#include <linux/string.h>
NeilBrown80212d52006-10-02 02:17:47 -070026#include <linux/smp_lock.h>
NeilBrownb41b66d2006-10-02 02:17:48 -070027#include <linux/ctype.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028
29#include <linux/nfs.h>
30#include <linux/nfsd_idmap.h>
NeilBrownb41b66d2006-10-02 02:17:48 -070031#include <linux/lockd/bind.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include <linux/sunrpc/svc.h>
NeilBrown80212d52006-10-02 02:17:47 -070033#include <linux/sunrpc/svcsock.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#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 */
45enum {
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,
Greg Bankseed29652006-10-02 02:18:02 -070057 NFSD_Pool_Threads,
NeilBrown70c3b762005-11-07 01:00:25 -080058 NFSD_Versions,
NeilBrown80212d52006-10-02 02:17:47 -070059 NFSD_Ports,
NeilBrown596bbe52006-10-04 02:15:48 -070060 NFSD_MaxBlkSize,
NeilBrown70c3b762005-11-07 01:00:25 -080061 /*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070066 NFSD_Leasetime,
NeilBrown0964a3d2005-06-23 22:04:32 -070067 NFSD_RecoveryDir,
NeilBrown70c3b762005-11-07 01:00:25 -080068#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070069};
70
71/*
72 * write() for these nodes.
73 */
74static ssize_t write_svc(struct file *file, char *buf, size_t size);
75static ssize_t write_add(struct file *file, char *buf, size_t size);
76static ssize_t write_del(struct file *file, char *buf, size_t size);
77static ssize_t write_export(struct file *file, char *buf, size_t size);
78static ssize_t write_unexport(struct file *file, char *buf, size_t size);
79static ssize_t write_getfd(struct file *file, char *buf, size_t size);
80static ssize_t write_getfs(struct file *file, char *buf, size_t size);
81static ssize_t write_filehandle(struct file *file, char *buf, size_t size);
82static ssize_t write_threads(struct file *file, char *buf, size_t size);
Greg Bankseed29652006-10-02 02:18:02 -070083static ssize_t write_pool_threads(struct file *file, char *buf, size_t size);
NeilBrown70c3b762005-11-07 01:00:25 -080084static ssize_t write_versions(struct file *file, char *buf, size_t size);
NeilBrown80212d52006-10-02 02:17:47 -070085static ssize_t write_ports(struct file *file, char *buf, size_t size);
NeilBrown596bbe52006-10-04 02:15:48 -070086static ssize_t write_maxblksize(struct file *file, char *buf, size_t size);
NeilBrown70c3b762005-11-07 01:00:25 -080087#ifdef CONFIG_NFSD_V4
Linus Torvalds1da177e2005-04-16 15:20:36 -070088static ssize_t write_leasetime(struct file *file, char *buf, size_t size);
NeilBrown0964a3d2005-06-23 22:04:32 -070089static ssize_t write_recoverydir(struct file *file, char *buf, size_t size);
NeilBrown70c3b762005-11-07 01:00:25 -080090#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
92static 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,
Greg Bankseed29652006-10-02 02:18:02 -0700102 [NFSD_Pool_Threads] = write_pool_threads,
NeilBrown70c3b762005-11-07 01:00:25 -0800103 [NFSD_Versions] = write_versions,
NeilBrown80212d52006-10-02 02:17:47 -0700104 [NFSD_Ports] = write_ports,
NeilBrown596bbe52006-10-04 02:15:48 -0700105 [NFSD_MaxBlkSize] = write_maxblksize,
NeilBrown70c3b762005-11-07 01:00:25 -0800106#ifdef CONFIG_NFSD_V4
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 [NFSD_Leasetime] = write_leasetime,
NeilBrown0964a3d2005-06-23 22:04:32 -0700108 [NFSD_RecoveryDir] = write_recoverydir,
NeilBrown70c3b762005-11-07 01:00:25 -0800109#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110};
111
112static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
113{
Josef "Jeff" Sipek7eaa36e2006-12-08 02:36:41 -0800114 ino_t ino = file->f_path.dentry->d_inode->i_ino;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 char *data;
116 ssize_t rv;
117
Tobias Klausere8c96f82006-03-24 03:15:34 -0800118 if (ino >= ARRAY_SIZE(write_op) || !write_op[ino])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 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
NeilBrown73900222005-11-07 01:00:24 -0800133static 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
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800147static const struct file_operations transaction_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 .write = nfsctl_transaction_write,
NeilBrown73900222005-11-07 01:00:24 -0800149 .read = nfsctl_transaction_read,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 .release = simple_transaction_release,
151};
152
153extern struct seq_operations nfs_exports_op;
154static int exports_open(struct inode *inode, struct file *file)
155{
156 return seq_open(file, &nfs_exports_op);
157}
158
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800159static const struct file_operations exports_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 .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
173static 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
182static 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
191static 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
200static 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
209static 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
219static 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
253static 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
292static 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
348extern int nfsd_nrthreads(void);
349
350static 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
Greg Bankseed29652006-10-02 02:18:02 -0700372extern int nfsd_nrpools(void);
373extern int nfsd_get_nrthreads(int n, int *);
374extern int nfsd_set_nrthreads(int n, int *);
375
376static 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
433out_free:
434 kfree(nthreads);
435 return rv;
436}
437
NeilBrown70c3b762005-11-07 01:00:25 -0800438static 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)
NeilBrown6658d3a2006-10-02 02:17:46 -0700452 /* Cannot change versions without updating
453 * nfsd_serv->sv_xdrsize, and reallocing
454 * rq_argp and rq_resp
455 */
NeilBrown70c3b762005-11-07 01:00:25 -0800456 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:
NeilBrown6658d3a2006-10-02 02:17:46 -0700474 nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET);
NeilBrown70c3b762005-11-07 01:00:25 -0800475 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 */
NeilBrown6658d3a2006-10-02 02:17:46 -0700485 nfsd_reset_versions();
NeilBrown70c3b762005-11-07 01:00:25 -0800486 }
487 /* Now write current state into reply buffer */
488 len = 0;
489 sep = "";
490 for (num=2 ; num <= 4 ; num++)
NeilBrown6658d3a2006-10-02 02:17:46 -0700491 if (nfsd_vers(num, NFSD_AVAIL)) {
NeilBrown70c3b762005-11-07 01:00:25 -0800492 len += sprintf(buf+len, "%s%c%d", sep,
NeilBrown6658d3a2006-10-02 02:17:46 -0700493 nfsd_vers(num, NFSD_TEST)?'+':'-',
NeilBrown70c3b762005-11-07 01:00:25 -0800494 num);
495 sep = " ";
496 }
497 len += sprintf(buf+len, "\n");
498 return len;
499}
500
NeilBrown80212d52006-10-02 02:17:47 -0700501static ssize_t write_ports(struct file *file, char *buf, size_t size)
502{
NeilBrownb41b66d2006-10-02 02:17:48 -0700503 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.
NeilBrown80212d52006-10-02 02:17:47 -0700516 */
NeilBrownb41b66d2006-10-02 02:17:48 -0700517 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;
NeilBrown5680c442006-10-04 02:15:45 -0700529 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);
NeilBrown3dfb4212006-10-02 02:17:51 -0700534 }
NeilBrownb41b66d2006-10-02 02:17:48 -0700535 /* Decrease the count, but don't shutdown the
536 * the service
537 */
NeilBrowncda9e0c2006-10-04 02:15:44 -0700538 lock_kernel();
NeilBrownb41b66d2006-10-02 02:17:48 -0700539 nfsd_serv->sv_nrthreads--;
NeilBrowncda9e0c2006-10-04 02:15:44 -0700540 unlock_kernel();
NeilBrownb41b66d2006-10-02 02:17:48 -0700541 }
NeilBrown5680c442006-10-04 02:15:45 -0700542 return err < 0 ? err : 0;
NeilBrownb41b66d2006-10-02 02:17:48 -0700543 }
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();
NeilBrown37a03472006-10-04 02:15:44 -0700553 if (len >= 0)
554 lockd_down();
NeilBrownb41b66d2006-10-02 02:17:48 -0700555 kfree(toclose);
556 return len;
557 }
558 return -EINVAL;
NeilBrown80212d52006-10-02 02:17:47 -0700559}
560
NeilBrown596bbe52006-10-04 02:15:48 -0700561int nfsd_max_blksize;
562
563static 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
NeilBrown70c3b762005-11-07 01:00:25 -0800590#ifdef CONFIG_NFSD_V4
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591extern time_t nfs4_leasetime(void);
592
593static 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
NeilBrown0964a3d2005-06-23 22:04:32 -0700614static 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}
NeilBrown70c3b762005-11-07 01:00:25 -0800632#endif
NeilBrown0964a3d2005-06-23 22:04:32 -0700633
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634/*----------------------------------------------------------------------------*/
635/*
636 * populating the filesystem.
637 */
638
639static 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},
Greg Bankseed29652006-10-02 02:18:02 -0700652 [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR},
NeilBrown70c3b762005-11-07 01:00:25 -0800653 [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR},
NeilBrown80212d52006-10-02 02:17:47 -0700654 [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO},
NeilBrown596bbe52006-10-04 02:15:48 -0700655 [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656#ifdef CONFIG_NFSD_V4
657 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR},
NeilBrown0964a3d2005-06-23 22:04:32 -0700658 [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659#endif
660 /* last one */ {""}
661 };
662 return simple_fill_super(sb, 0x6e667364, nfsd_files);
663}
664
David Howells454e2392006-06-23 02:02:57 -0700665static int nfsd_get_sb(struct file_system_type *fs_type,
666 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667{
David Howells454e2392006-06-23 02:02:57 -0700668 return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669}
670
671static 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
678static 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 */
NeilBrownac4d8ff22005-06-23 22:03:30 -0700687 nfs4_state_init(); /* NFSv4 locking state */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 nfsd_idmap_init(); /* Name to ID mapping */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 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
707static 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();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 nfsd_idmap_shutdown();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 unregister_filesystem(&nfsd_fs_type);
717}
718
719MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
720MODULE_LICENSE("GPL");
721module_init(init_nfsd)
722module_exit(exit_nfsd)