blob: 613bcb8171a5da1a649f5a5ab01601e42830a9f5 [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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038
39#include <asm/uaccess.h>
Aurélien Charbonf15364b2008-01-18 15:50:56 +010040#include <net/ipv6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
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);
NeilBrown8971a102007-02-14 00:33:11 -0800126 if (rv >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153static int exports_open(struct inode *inode, struct file *file)
154{
155 return seq_open(file, &nfs_exports_op);
156}
157
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800158static const struct file_operations exports_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 .open = exports_open,
160 .read = seq_read,
161 .llseek = seq_lseek,
162 .release = seq_release,
163};
164
165/*----------------------------------------------------------------------------*/
166/*
167 * payload - write methods
168 * If the method has a response, the response should be put in buf,
169 * and the length returned. Otherwise return 0 or and -error.
170 */
171
172static ssize_t write_svc(struct file *file, char *buf, size_t size)
173{
174 struct nfsctl_svc *data;
175 if (size < sizeof(*data))
176 return -EINVAL;
177 data = (struct nfsctl_svc*) buf;
178 return nfsd_svc(data->svc_port, data->svc_nthreads);
179}
180
181static ssize_t write_add(struct file *file, char *buf, size_t size)
182{
183 struct nfsctl_client *data;
184 if (size < sizeof(*data))
185 return -EINVAL;
186 data = (struct nfsctl_client *)buf;
187 return exp_addclient(data);
188}
189
190static ssize_t write_del(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_delclient(data);
197}
198
199static ssize_t write_export(struct file *file, char *buf, size_t size)
200{
201 struct nfsctl_export *data;
202 if (size < sizeof(*data))
203 return -EINVAL;
204 data = (struct nfsctl_export*)buf;
205 return exp_export(data);
206}
207
208static ssize_t write_unexport(struct file *file, char *buf, size_t size)
209{
210 struct nfsctl_export *data;
211
212 if (size < sizeof(*data))
213 return -EINVAL;
214 data = (struct nfsctl_export*)buf;
215 return exp_unexport(data);
216}
217
218static ssize_t write_getfs(struct file *file, char *buf, size_t size)
219{
220 struct nfsctl_fsparm *data;
221 struct sockaddr_in *sin;
222 struct auth_domain *clp;
223 int err = 0;
224 struct knfsd_fh *res;
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100225 struct in6_addr in6;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226
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();
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100240
241 ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6);
242
243 clp = auth_unix_lookup(&in6);
244 if (!clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 err = -EPERM;
246 else {
247 err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen);
248 auth_domain_put(clp);
249 }
250 exp_readunlock();
251 if (err == 0)
Andrew Morton12127492007-07-17 04:04:34 -0700252 err = res->fh_size + offsetof(struct knfsd_fh, fh_base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 out:
254 return err;
255}
256
257static ssize_t write_getfd(struct file *file, char *buf, size_t size)
258{
259 struct nfsctl_fdparm *data;
260 struct sockaddr_in *sin;
261 struct auth_domain *clp;
262 int err = 0;
263 struct knfsd_fh fh;
264 char *res;
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100265 struct in6_addr in6;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266
267 if (size < sizeof(*data))
268 return -EINVAL;
269 data = (struct nfsctl_fdparm*)buf;
270 err = -EPROTONOSUPPORT;
271 if (data->gd_addr.sa_family != AF_INET)
272 goto out;
273 err = -EINVAL;
274 if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS)
275 goto out;
276
277 res = buf;
278 sin = (struct sockaddr_in *)&data->gd_addr;
279 exp_readlock();
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100280
281 ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6);
282
283 clp = auth_unix_lookup(&in6);
284 if (!clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 err = -EPERM;
286 else {
287 err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE);
288 auth_domain_put(clp);
289 }
290 exp_readunlock();
291
292 if (err == 0) {
293 memset(res,0, NFS_FHSIZE);
294 memcpy(res, &fh.fh_base, fh.fh_size);
295 err = NFS_FHSIZE;
296 }
297 out:
298 return err;
299}
300
301static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
302{
303 /* request is:
304 * domain path maxsize
305 * response is
306 * filehandle
307 *
308 * qword quoting is used, so filehandle will be \x....
309 */
310 char *dname, *path;
Andrew Morton246d95b2007-08-09 00:53:50 -0700311 int uninitialized_var(maxsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 char *mesg = buf;
313 int len;
314 struct auth_domain *dom;
315 struct knfsd_fh fh;
316
J. Bruce Fields87d26ea2008-01-22 17:40:42 -0500317 if (size == 0)
318 return -EINVAL;
319
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 if (buf[size-1] != '\n')
321 return -EINVAL;
322 buf[size-1] = 0;
323
324 dname = mesg;
325 len = qword_get(&mesg, dname, size);
326 if (len <= 0) return -EINVAL;
327
328 path = dname+len+1;
329 len = qword_get(&mesg, path, size);
330 if (len <= 0) return -EINVAL;
331
332 len = get_int(&mesg, &maxsize);
333 if (len)
334 return len;
335
336 if (maxsize < NFS_FHSIZE)
337 return -EINVAL;
338 if (maxsize > NFS3_FHSIZE)
339 maxsize = NFS3_FHSIZE;
340
341 if (qword_get(&mesg, mesg, size)>0)
342 return -EINVAL;
343
344 /* we have all the words, they are in buf.. */
345 dom = unix_domain_find(dname);
346 if (!dom)
347 return -ENOMEM;
348
349 len = exp_rootfh(dom, path, &fh, maxsize);
350 auth_domain_put(dom);
351 if (len)
352 return len;
353
354 mesg = buf; len = SIMPLE_TRANSACTION_LIMIT;
355 qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
356 mesg[-1] = '\n';
357 return mesg - buf;
358}
359
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360static ssize_t write_threads(struct file *file, char *buf, size_t size)
361{
362 /* if size > 0, look for a number of threads and call nfsd_svc
363 * then write out number of threads as reply
364 */
365 char *mesg = buf;
366 int rv;
367 if (size > 0) {
368 int newthreads;
369 rv = get_int(&mesg, &newthreads);
370 if (rv)
371 return rv;
372 if (newthreads <0)
373 return -EINVAL;
374 rv = nfsd_svc(2049, newthreads);
375 if (rv)
376 return rv;
377 }
378 sprintf(buf, "%d\n", nfsd_nrthreads());
379 return strlen(buf);
380}
381
Greg Bankseed29652006-10-02 02:18:02 -0700382static ssize_t write_pool_threads(struct file *file, char *buf, size_t size)
383{
384 /* if size > 0, look for an array of number of threads per node
385 * and apply them then write out number of threads per node as reply
386 */
387 char *mesg = buf;
388 int i;
389 int rv;
390 int len;
391 int npools = nfsd_nrpools();
392 int *nthreads;
393
394 if (npools == 0) {
395 /*
396 * NFS is shut down. The admin can start it by
397 * writing to the threads file but NOT the pool_threads
398 * file, sorry. Report zero threads.
399 */
400 strcpy(buf, "0\n");
401 return strlen(buf);
402 }
403
404 nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL);
405 if (nthreads == NULL)
406 return -ENOMEM;
407
408 if (size > 0) {
409 for (i = 0; i < npools; i++) {
410 rv = get_int(&mesg, &nthreads[i]);
411 if (rv == -ENOENT)
412 break; /* fewer numbers than pools */
413 if (rv)
414 goto out_free; /* syntax error */
415 rv = -EINVAL;
416 if (nthreads[i] < 0)
417 goto out_free;
418 }
419 rv = nfsd_set_nrthreads(i, nthreads);
420 if (rv)
421 goto out_free;
422 }
423
424 rv = nfsd_get_nrthreads(npools, nthreads);
425 if (rv)
426 goto out_free;
427
428 mesg = buf;
429 size = SIMPLE_TRANSACTION_LIMIT;
430 for (i = 0; i < npools && size > 0; i++) {
431 snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' '));
432 len = strlen(mesg);
433 size -= len;
434 mesg += len;
435 }
436
437 return (mesg-buf);
438
439out_free:
440 kfree(nthreads);
441 return rv;
442}
443
NeilBrown70c3b762005-11-07 01:00:25 -0800444static ssize_t write_versions(struct file *file, char *buf, size_t size)
445{
446 /*
447 * Format:
448 * [-/+]vers [-/+]vers ...
449 */
450 char *mesg = buf;
451 char *vers, sign;
452 int len, num;
453 ssize_t tlen = 0;
454 char *sep;
455
456 if (size>0) {
457 if (nfsd_serv)
NeilBrown6658d3a2006-10-02 02:17:46 -0700458 /* Cannot change versions without updating
459 * nfsd_serv->sv_xdrsize, and reallocing
460 * rq_argp and rq_resp
461 */
NeilBrown70c3b762005-11-07 01:00:25 -0800462 return -EBUSY;
463 if (buf[size-1] != '\n')
464 return -EINVAL;
465 buf[size-1] = 0;
466
467 vers = mesg;
468 len = qword_get(&mesg, vers, size);
469 if (len <= 0) return -EINVAL;
470 do {
471 sign = *vers;
472 if (sign == '+' || sign == '-')
473 num = simple_strtol((vers+1), NULL, 0);
474 else
475 num = simple_strtol(vers, NULL, 0);
476 switch(num) {
477 case 2:
478 case 3:
479 case 4:
NeilBrown6658d3a2006-10-02 02:17:46 -0700480 nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET);
NeilBrown70c3b762005-11-07 01:00:25 -0800481 break;
482 default:
483 return -EINVAL;
484 }
485 vers += len + 1;
486 tlen += len;
487 } while ((len = qword_get(&mesg, vers, size)) > 0);
488 /* If all get turned off, turn them back on, as
489 * having no versions is BAD
490 */
NeilBrown6658d3a2006-10-02 02:17:46 -0700491 nfsd_reset_versions();
NeilBrown70c3b762005-11-07 01:00:25 -0800492 }
493 /* Now write current state into reply buffer */
494 len = 0;
495 sep = "";
496 for (num=2 ; num <= 4 ; num++)
NeilBrown6658d3a2006-10-02 02:17:46 -0700497 if (nfsd_vers(num, NFSD_AVAIL)) {
NeilBrown70c3b762005-11-07 01:00:25 -0800498 len += sprintf(buf+len, "%s%c%d", sep,
NeilBrown6658d3a2006-10-02 02:17:46 -0700499 nfsd_vers(num, NFSD_TEST)?'+':'-',
NeilBrown70c3b762005-11-07 01:00:25 -0800500 num);
501 sep = " ";
502 }
503 len += sprintf(buf+len, "\n");
504 return len;
505}
506
NeilBrown80212d52006-10-02 02:17:47 -0700507static ssize_t write_ports(struct file *file, char *buf, size_t size)
508{
NeilBrownb41b66d2006-10-02 02:17:48 -0700509 if (size == 0) {
510 int len = 0;
511 lock_kernel();
512 if (nfsd_serv)
Tom Tucker9571af12007-12-30 21:08:37 -0600513 len = svc_xprt_names(nfsd_serv, buf, 0);
NeilBrownb41b66d2006-10-02 02:17:48 -0700514 unlock_kernel();
515 return len;
516 }
517 /* Either a single 'fd' number is written, in which
518 * case it must be for a socket of a supported family/protocol,
519 * and we use it as an nfsd socket, or
520 * A '-' followed by the 'name' of a socket in which case
521 * we close the socket.
NeilBrown80212d52006-10-02 02:17:47 -0700522 */
NeilBrownb41b66d2006-10-02 02:17:48 -0700523 if (isdigit(buf[0])) {
524 char *mesg = buf;
525 int fd;
526 int err;
527 err = get_int(&mesg, &fd);
528 if (err)
529 return -EINVAL;
530 if (fd < 0)
531 return -EINVAL;
532 err = nfsd_create_serv();
533 if (!err) {
534 int proto = 0;
NeilBrown5680c442006-10-04 02:15:45 -0700535 err = svc_addsock(nfsd_serv, fd, buf, &proto);
536 if (err >= 0) {
537 err = lockd_up(proto);
538 if (err < 0)
539 svc_sock_names(buf+strlen(buf)+1, nfsd_serv, buf);
NeilBrown3dfb4212006-10-02 02:17:51 -0700540 }
NeilBrownb41b66d2006-10-02 02:17:48 -0700541 /* Decrease the count, but don't shutdown the
542 * the service
543 */
NeilBrowncda9e0c2006-10-04 02:15:44 -0700544 lock_kernel();
NeilBrownb41b66d2006-10-02 02:17:48 -0700545 nfsd_serv->sv_nrthreads--;
NeilBrowncda9e0c2006-10-04 02:15:44 -0700546 unlock_kernel();
NeilBrownb41b66d2006-10-02 02:17:48 -0700547 }
NeilBrown5680c442006-10-04 02:15:45 -0700548 return err < 0 ? err : 0;
NeilBrownb41b66d2006-10-02 02:17:48 -0700549 }
Tom Tuckera2178132007-12-30 21:08:35 -0600550 if (buf[0] == '-' && isdigit(buf[1])) {
NeilBrownb41b66d2006-10-02 02:17:48 -0700551 char *toclose = kstrdup(buf+1, GFP_KERNEL);
552 int len = 0;
553 if (!toclose)
554 return -ENOMEM;
555 lock_kernel();
556 if (nfsd_serv)
557 len = svc_sock_names(buf, nfsd_serv, toclose);
558 unlock_kernel();
NeilBrown37a03472006-10-04 02:15:44 -0700559 if (len >= 0)
560 lockd_down();
NeilBrownb41b66d2006-10-02 02:17:48 -0700561 kfree(toclose);
562 return len;
563 }
Tom Tuckera2178132007-12-30 21:08:35 -0600564 /*
565 * Add a transport listener by writing it's transport name
566 */
567 if (isalpha(buf[0])) {
568 int err;
569 char transport[16];
570 int port;
571 if (sscanf(buf, "%15s %4d", transport, &port) == 2) {
572 err = nfsd_create_serv();
573 if (!err) {
574 err = svc_create_xprt(nfsd_serv,
575 transport, port,
576 SVC_SOCK_ANONYMOUS);
577 if (err == -ENOENT)
578 /* Give a reasonable perror msg for
579 * bad transport string */
580 err = -EPROTONOSUPPORT;
581 }
582 return err < 0 ? err : 0;
583 }
584 }
585 /*
586 * Remove a transport by writing it's transport name and port number
587 */
588 if (buf[0] == '-' && isalpha(buf[1])) {
589 struct svc_xprt *xprt;
590 int err = -EINVAL;
591 char transport[16];
592 int port;
593 if (sscanf(&buf[1], "%15s %4d", transport, &port) == 2) {
594 if (port == 0)
595 return -EINVAL;
596 lock_kernel();
597 if (nfsd_serv) {
598 xprt = svc_find_xprt(nfsd_serv, transport,
599 AF_UNSPEC, port);
600 if (xprt) {
601 svc_close_xprt(xprt);
602 svc_xprt_put(xprt);
603 err = 0;
604 } else
605 err = -ENOTCONN;
606 }
607 unlock_kernel();
608 return err < 0 ? err : 0;
609 }
610 }
NeilBrownb41b66d2006-10-02 02:17:48 -0700611 return -EINVAL;
NeilBrown80212d52006-10-02 02:17:47 -0700612}
613
NeilBrown596bbe52006-10-04 02:15:48 -0700614int nfsd_max_blksize;
615
616static ssize_t write_maxblksize(struct file *file, char *buf, size_t size)
617{
618 char *mesg = buf;
619 if (size > 0) {
620 int bsize;
621 int rv = get_int(&mesg, &bsize);
622 if (rv)
623 return rv;
624 /* force bsize into allowed range and
625 * required alignment.
626 */
627 if (bsize < 1024)
628 bsize = 1024;
629 if (bsize > NFSSVC_MAXBLKSIZE)
630 bsize = NFSSVC_MAXBLKSIZE;
631 bsize &= ~(1024-1);
632 lock_kernel();
633 if (nfsd_serv && nfsd_serv->sv_nrthreads) {
634 unlock_kernel();
635 return -EBUSY;
636 }
637 nfsd_max_blksize = bsize;
638 unlock_kernel();
639 }
640 return sprintf(buf, "%d\n", nfsd_max_blksize);
641}
642
NeilBrown70c3b762005-11-07 01:00:25 -0800643#ifdef CONFIG_NFSD_V4
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644extern time_t nfs4_leasetime(void);
645
646static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
647{
648 /* if size > 10 seconds, call
649 * nfs4_reset_lease() then write out the new lease (seconds) as reply
650 */
651 char *mesg = buf;
652 int rv;
653
654 if (size > 0) {
655 int lease;
656 rv = get_int(&mesg, &lease);
657 if (rv)
658 return rv;
659 if (lease < 10 || lease > 3600)
660 return -EINVAL;
661 nfs4_reset_lease(lease);
662 }
663 sprintf(buf, "%ld\n", nfs4_lease_time());
664 return strlen(buf);
665}
666
NeilBrown0964a3d2005-06-23 22:04:32 -0700667static ssize_t write_recoverydir(struct file *file, char *buf, size_t size)
668{
669 char *mesg = buf;
670 char *recdir;
671 int len, status;
672
J. Bruce Fields87d26ea2008-01-22 17:40:42 -0500673 if (size == 0 || size > PATH_MAX || buf[size-1] != '\n')
NeilBrown0964a3d2005-06-23 22:04:32 -0700674 return -EINVAL;
675 buf[size-1] = 0;
676
677 recdir = mesg;
678 len = qword_get(&mesg, recdir, size);
679 if (len <= 0)
680 return -EINVAL;
681
682 status = nfs4_reset_recoverydir(recdir);
683 return strlen(buf);
684}
NeilBrown70c3b762005-11-07 01:00:25 -0800685#endif
NeilBrown0964a3d2005-06-23 22:04:32 -0700686
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687/*----------------------------------------------------------------------------*/
688/*
689 * populating the filesystem.
690 */
691
692static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
693{
694 static struct tree_descr nfsd_files[] = {
695 [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR},
696 [NFSD_Add] = {".add", &transaction_ops, S_IWUSR},
697 [NFSD_Del] = {".del", &transaction_ops, S_IWUSR},
698 [NFSD_Export] = {".export", &transaction_ops, S_IWUSR},
699 [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR},
700 [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR},
701 [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR},
702 [NFSD_List] = {"exports", &exports_operations, S_IRUGO},
703 [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR},
704 [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
Greg Bankseed29652006-10-02 02:18:02 -0700705 [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR},
NeilBrown70c3b762005-11-07 01:00:25 -0800706 [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR},
NeilBrown80212d52006-10-02 02:17:47 -0700707 [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO},
NeilBrown596bbe52006-10-04 02:15:48 -0700708 [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709#ifdef CONFIG_NFSD_V4
710 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR},
NeilBrown0964a3d2005-06-23 22:04:32 -0700711 [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712#endif
713 /* last one */ {""}
714 };
715 return simple_fill_super(sb, 0x6e667364, nfsd_files);
716}
717
David Howells454e2392006-06-23 02:02:57 -0700718static int nfsd_get_sb(struct file_system_type *fs_type,
719 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720{
David Howells454e2392006-06-23 02:02:57 -0700721 return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722}
723
724static struct file_system_type nfsd_fs_type = {
725 .owner = THIS_MODULE,
726 .name = "nfsd",
727 .get_sb = nfsd_get_sb,
728 .kill_sb = kill_litter_super,
729};
730
J. Bruce Fieldse331f602007-11-12 17:32:21 -0500731#ifdef CONFIG_PROC_FS
732static int create_proc_exports_entry(void)
733{
734 struct proc_dir_entry *entry;
735
736 entry = proc_mkdir("fs/nfs", NULL);
737 if (!entry)
738 return -ENOMEM;
739 entry = create_proc_entry("fs/nfs/exports", 0, NULL);
740 if (!entry)
741 return -ENOMEM;
742 entry->proc_fops = &exports_operations;
743 return 0;
744}
745#else /* CONFIG_PROC_FS */
746static int create_proc_exports_entry(void)
747{
748 return 0;
749}
750#endif
751
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752static int __init init_nfsd(void)
753{
754 int retval;
755 printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
756
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -0400757 retval = nfs4_state_init(); /* nfs4 locking state */
758 if (retval)
759 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 nfsd_stat_init(); /* Statistics */
J. Bruce Fieldsd5c34282007-11-09 14:10:56 -0500761 retval = nfsd_reply_cache_init();
762 if (retval)
763 goto out_free_stat;
J. Bruce Fieldsdbf847e2007-11-08 17:20:34 -0500764 retval = nfsd_export_init();
765 if (retval)
766 goto out_free_cache;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 nfsd_lockd_init(); /* lockd->nfsd callbacks */
J. Bruce Fieldsdbf847e2007-11-08 17:20:34 -0500768 retval = nfsd_idmap_init();
769 if (retval)
770 goto out_free_lockd;
J. Bruce Fieldse331f602007-11-12 17:32:21 -0500771 retval = create_proc_exports_entry();
772 if (retval)
773 goto out_free_idmap;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774 retval = register_filesystem(&nfsd_fs_type);
J. Bruce Fields26808d32007-11-09 13:44:06 -0500775 if (retval)
776 goto out_free_all;
777 return 0;
778out_free_all:
J. Bruce Fields26808d32007-11-09 13:44:06 -0500779 remove_proc_entry("fs/nfs/exports", NULL);
780 remove_proc_entry("fs/nfs", NULL);
J. Bruce Fieldse331f602007-11-12 17:32:21 -0500781out_free_idmap:
J. Bruce Fieldsdbf847e2007-11-08 17:20:34 -0500782 nfsd_idmap_shutdown();
783out_free_lockd:
J. Bruce Fields26808d32007-11-09 13:44:06 -0500784 nfsd_lockd_shutdown();
J. Bruce Fieldse331f602007-11-12 17:32:21 -0500785 nfsd_export_shutdown();
J. Bruce Fieldsdbf847e2007-11-08 17:20:34 -0500786out_free_cache:
J. Bruce Fieldse331f602007-11-12 17:32:21 -0500787 nfsd_reply_cache_shutdown();
J. Bruce Fieldsd5c34282007-11-09 14:10:56 -0500788out_free_stat:
789 nfsd_stat_shutdown();
J. Bruce Fields26808d32007-11-09 13:44:06 -0500790 nfsd4_free_slabs();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791 return retval;
792}
793
794static void __exit exit_nfsd(void)
795{
796 nfsd_export_shutdown();
J. Bruce Fieldsd5c34282007-11-09 14:10:56 -0500797 nfsd_reply_cache_shutdown();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 remove_proc_entry("fs/nfs/exports", NULL);
799 remove_proc_entry("fs/nfs", NULL);
800 nfsd_stat_shutdown();
801 nfsd_lockd_shutdown();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 nfsd_idmap_shutdown();
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -0400803 nfsd4_free_slabs();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804 unregister_filesystem(&nfsd_fs_type);
805}
806
807MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
808MODULE_LICENSE("GPL");
809module_init(init_nfsd)
810module_exit(exit_nfsd)