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1/*
2 * Syscall interface to knfsd.
3 *
4 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
5 */
6
7#include <linux/slab.h>
8#include <linux/namei.h>
9#include <linux/ctype.h>
10
11#include <linux/sunrpc/svcsock.h>
12#include <linux/lockd/lockd.h>
13#include <linux/sunrpc/addr.h>
14#include <linux/sunrpc/gss_api.h>
15#include <linux/sunrpc/gss_krb5_enctypes.h>
16#include <linux/sunrpc/rpc_pipe_fs.h>
17#include <linux/module.h>
18
19#include "idmap.h"
20#include "nfsd.h"
21#include "cache.h"
22#include "state.h"
23#include "netns.h"
24
25/*
26 * We have a single directory with several nodes in it.
27 */
28enum {
29 NFSD_Root = 1,
30 NFSD_List,
31 NFSD_Export_features,
32 NFSD_Fh,
33 NFSD_FO_UnlockIP,
34 NFSD_FO_UnlockFS,
35 NFSD_Threads,
36 NFSD_Pool_Threads,
37 NFSD_Pool_Stats,
38 NFSD_Reply_Cache_Stats,
39 NFSD_Versions,
40 NFSD_Ports,
41 NFSD_MaxBlkSize,
42 NFSD_SupportedEnctypes,
43 /*
44 * The below MUST come last. Otherwise we leave a hole in nfsd_files[]
45 * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops
46 */
47#ifdef CONFIG_NFSD_V4
48 NFSD_Leasetime,
49 NFSD_Gracetime,
50 NFSD_RecoveryDir,
51#endif
52};
53
54/*
55 * write() for these nodes.
56 */
57static ssize_t write_filehandle(struct file *file, char *buf, size_t size);
58static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size);
59static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size);
60static ssize_t write_threads(struct file *file, char *buf, size_t size);
61static ssize_t write_pool_threads(struct file *file, char *buf, size_t size);
62static ssize_t write_versions(struct file *file, char *buf, size_t size);
63static ssize_t write_ports(struct file *file, char *buf, size_t size);
64static ssize_t write_maxblksize(struct file *file, char *buf, size_t size);
65#ifdef CONFIG_NFSD_V4
66static ssize_t write_leasetime(struct file *file, char *buf, size_t size);
67static ssize_t write_gracetime(struct file *file, char *buf, size_t size);
68static ssize_t write_recoverydir(struct file *file, char *buf, size_t size);
69#endif
70
71static ssize_t (*write_op[])(struct file *, char *, size_t) = {
72 [NFSD_Fh] = write_filehandle,
73 [NFSD_FO_UnlockIP] = write_unlock_ip,
74 [NFSD_FO_UnlockFS] = write_unlock_fs,
75 [NFSD_Threads] = write_threads,
76 [NFSD_Pool_Threads] = write_pool_threads,
77 [NFSD_Versions] = write_versions,
78 [NFSD_Ports] = write_ports,
79 [NFSD_MaxBlkSize] = write_maxblksize,
80#ifdef CONFIG_NFSD_V4
81 [NFSD_Leasetime] = write_leasetime,
82 [NFSD_Gracetime] = write_gracetime,
83 [NFSD_RecoveryDir] = write_recoverydir,
84#endif
85};
86
87static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
88{
89 ino_t ino = file_inode(file)->i_ino;
90 char *data;
91 ssize_t rv;
92
93 if (ino >= ARRAY_SIZE(write_op) || !write_op[ino])
94 return -EINVAL;
95
96 data = simple_transaction_get(file, buf, size);
97 if (IS_ERR(data))
98 return PTR_ERR(data);
99
100 rv = write_op[ino](file, data, size);
101 if (rv >= 0) {
102 simple_transaction_set(file, rv);
103 rv = size;
104 }
105 return rv;
106}
107
108static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos)
109{
110 if (! file->private_data) {
111 /* An attempt to read a transaction file without writing
112 * causes a 0-byte write so that the file can return
113 * state information
114 */
115 ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos);
116 if (rv < 0)
117 return rv;
118 }
119 return simple_transaction_read(file, buf, size, pos);
120}
121
122static const struct file_operations transaction_ops = {
123 .write = nfsctl_transaction_write,
124 .read = nfsctl_transaction_read,
125 .release = simple_transaction_release,
126 .llseek = default_llseek,
127};
128
129static int exports_net_open(struct net *net, struct file *file)
130{
131 int err;
132 struct seq_file *seq;
133 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
134
135 err = seq_open(file, &nfs_exports_op);
136 if (err)
137 return err;
138
139 seq = file->private_data;
140 seq->private = nn->svc_export_cache;
141 return 0;
142}
143
144static int exports_proc_open(struct inode *inode, struct file *file)
145{
146 return exports_net_open(current->nsproxy->net_ns, file);
147}
148
149static const struct file_operations exports_proc_operations = {
150 .open = exports_proc_open,
151 .read = seq_read,
152 .llseek = seq_lseek,
153 .release = seq_release,
154 .owner = THIS_MODULE,
155};
156
157static int exports_nfsd_open(struct inode *inode, struct file *file)
158{
159 return exports_net_open(inode->i_sb->s_fs_info, file);
160}
161
162static const struct file_operations exports_nfsd_operations = {
163 .open = exports_nfsd_open,
164 .read = seq_read,
165 .llseek = seq_lseek,
166 .release = seq_release,
167 .owner = THIS_MODULE,
168};
169
170static int export_features_show(struct seq_file *m, void *v)
171{
172 seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS);
173 return 0;
174}
175
176static int export_features_open(struct inode *inode, struct file *file)
177{
178 return single_open(file, export_features_show, NULL);
179}
180
181static const struct file_operations export_features_operations = {
182 .open = export_features_open,
183 .read = seq_read,
184 .llseek = seq_lseek,
185 .release = single_release,
186};
187
188#if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE)
189static int supported_enctypes_show(struct seq_file *m, void *v)
190{
191 seq_printf(m, KRB5_SUPPORTED_ENCTYPES);
192 return 0;
193}
194
195static int supported_enctypes_open(struct inode *inode, struct file *file)
196{
197 return single_open(file, supported_enctypes_show, NULL);
198}
199
200static const struct file_operations supported_enctypes_ops = {
201 .open = supported_enctypes_open,
202 .read = seq_read,
203 .llseek = seq_lseek,
204 .release = single_release,
205};
206#endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */
207
208static const struct file_operations pool_stats_operations = {
209 .open = nfsd_pool_stats_open,
210 .read = seq_read,
211 .llseek = seq_lseek,
212 .release = nfsd_pool_stats_release,
213 .owner = THIS_MODULE,
214};
215
216static struct file_operations reply_cache_stats_operations = {
217 .open = nfsd_reply_cache_stats_open,
218 .read = seq_read,
219 .llseek = seq_lseek,
220 .release = single_release,
221};
222
223/*----------------------------------------------------------------------------*/
224/*
225 * payload - write methods
226 */
227
228
229/**
230 * write_unlock_ip - Release all locks used by a client
231 *
232 * Experimental.
233 *
234 * Input:
235 * buf: '\n'-terminated C string containing a
236 * presentation format IP address
237 * size: length of C string in @buf
238 * Output:
239 * On success: returns zero if all specified locks were released;
240 * returns one if one or more locks were not released
241 * On error: return code is negative errno value
242 */
243static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size)
244{
245 struct sockaddr_storage address;
246 struct sockaddr *sap = (struct sockaddr *)&address;
247 size_t salen = sizeof(address);
248 char *fo_path;
249 struct net *net = file->f_dentry->d_sb->s_fs_info;
250
251 /* sanity check */
252 if (size == 0)
253 return -EINVAL;
254
255 if (buf[size-1] != '\n')
256 return -EINVAL;
257
258 fo_path = buf;
259 if (qword_get(&buf, fo_path, size) < 0)
260 return -EINVAL;
261
262 if (rpc_pton(net, fo_path, size, sap, salen) == 0)
263 return -EINVAL;
264
265 return nlmsvc_unlock_all_by_ip(sap);
266}
267
268/**
269 * write_unlock_fs - Release all locks on a local file system
270 *
271 * Experimental.
272 *
273 * Input:
274 * buf: '\n'-terminated C string containing the
275 * absolute pathname of a local file system
276 * size: length of C string in @buf
277 * Output:
278 * On success: returns zero if all specified locks were released;
279 * returns one if one or more locks were not released
280 * On error: return code is negative errno value
281 */
282static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size)
283{
284 struct path path;
285 char *fo_path;
286 int error;
287
288 /* sanity check */
289 if (size == 0)
290 return -EINVAL;
291
292 if (buf[size-1] != '\n')
293 return -EINVAL;
294
295 fo_path = buf;
296 if (qword_get(&buf, fo_path, size) < 0)
297 return -EINVAL;
298
299 error = kern_path(fo_path, 0, &path);
300 if (error)
301 return error;
302
303 /*
304 * XXX: Needs better sanity checking. Otherwise we could end up
305 * releasing locks on the wrong file system.
306 *
307 * For example:
308 * 1. Does the path refer to a directory?
309 * 2. Is that directory a mount point, or
310 * 3. Is that directory the root of an exported file system?
311 */
312 error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb);
313
314 path_put(&path);
315 return error;
316}
317
318/**
319 * write_filehandle - Get a variable-length NFS file handle by path
320 *
321 * On input, the buffer contains a '\n'-terminated C string comprised of
322 * three alphanumeric words separated by whitespace. The string may
323 * contain escape sequences.
324 *
325 * Input:
326 * buf:
327 * domain: client domain name
328 * path: export pathname
329 * maxsize: numeric maximum size of
330 * @buf
331 * size: length of C string in @buf
332 * Output:
333 * On success: passed-in buffer filled with '\n'-terminated C
334 * string containing a ASCII hex text version
335 * of the NFS file handle;
336 * return code is the size in bytes of the string
337 * On error: return code is negative errno value
338 */
339static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
340{
341 char *dname, *path;
342 int uninitialized_var(maxsize);
343 char *mesg = buf;
344 int len;
345 struct auth_domain *dom;
346 struct knfsd_fh fh;
347 struct net *net = file->f_dentry->d_sb->s_fs_info;
348
349 if (size == 0)
350 return -EINVAL;
351
352 if (buf[size-1] != '\n')
353 return -EINVAL;
354 buf[size-1] = 0;
355
356 dname = mesg;
357 len = qword_get(&mesg, dname, size);
358 if (len <= 0)
359 return -EINVAL;
360
361 path = dname+len+1;
362 len = qword_get(&mesg, path, size);
363 if (len <= 0)
364 return -EINVAL;
365
366 len = get_int(&mesg, &maxsize);
367 if (len)
368 return len;
369
370 if (maxsize < NFS_FHSIZE)
371 return -EINVAL;
372 if (maxsize > NFS3_FHSIZE)
373 maxsize = NFS3_FHSIZE;
374
375 if (qword_get(&mesg, mesg, size)>0)
376 return -EINVAL;
377
378 /* we have all the words, they are in buf.. */
379 dom = unix_domain_find(dname);
380 if (!dom)
381 return -ENOMEM;
382
383 len = exp_rootfh(net, dom, path, &fh, maxsize);
384 auth_domain_put(dom);
385 if (len)
386 return len;
387
388 mesg = buf;
389 len = SIMPLE_TRANSACTION_LIMIT;
390 qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
391 mesg[-1] = '\n';
392 return mesg - buf;
393}
394
395/**
396 * write_threads - Start NFSD, or report the current number of running threads
397 *
398 * Input:
399 * buf: ignored
400 * size: zero
401 * Output:
402 * On success: passed-in buffer filled with '\n'-terminated C
403 * string numeric value representing the number of
404 * running NFSD threads;
405 * return code is the size in bytes of the string
406 * On error: return code is zero
407 *
408 * OR
409 *
410 * Input:
411 * buf: C string containing an unsigned
412 * integer value representing the
413 * number of NFSD threads to start
414 * size: non-zero length of C string in @buf
415 * Output:
416 * On success: NFS service is started;
417 * passed-in buffer filled with '\n'-terminated C
418 * string numeric value representing the number of
419 * running NFSD threads;
420 * return code is the size in bytes of the string
421 * On error: return code is zero or a negative errno value
422 */
423static ssize_t write_threads(struct file *file, char *buf, size_t size)
424{
425 char *mesg = buf;
426 int rv;
427 struct net *net = file->f_dentry->d_sb->s_fs_info;
428
429 if (size > 0) {
430 int newthreads;
431 rv = get_int(&mesg, &newthreads);
432 if (rv)
433 return rv;
434 if (newthreads < 0)
435 return -EINVAL;
436 rv = nfsd_svc(newthreads, net);
437 if (rv < 0)
438 return rv;
439 } else
440 rv = nfsd_nrthreads(net);
441
442 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv);
443}
444
445/**
446 * write_pool_threads - Set or report the current number of threads per pool
447 *
448 * Input:
449 * buf: ignored
450 * size: zero
451 *
452 * OR
453 *
454 * Input:
455 * buf: C string containing whitespace-
456 * separated unsigned integer values
457 * representing the number of NFSD
458 * threads to start in each pool
459 * size: non-zero length of C string in @buf
460 * Output:
461 * On success: passed-in buffer filled with '\n'-terminated C
462 * string containing integer values representing the
463 * number of NFSD threads in each pool;
464 * return code is the size in bytes of the string
465 * On error: return code is zero or a negative errno value
466 */
467static ssize_t write_pool_threads(struct file *file, char *buf, size_t size)
468{
469 /* if size > 0, look for an array of number of threads per node
470 * and apply them then write out number of threads per node as reply
471 */
472 char *mesg = buf;
473 int i;
474 int rv;
475 int len;
476 int npools;
477 int *nthreads;
478 struct net *net = file->f_dentry->d_sb->s_fs_info;
479
480 mutex_lock(&nfsd_mutex);
481 npools = nfsd_nrpools(net);
482 if (npools == 0) {
483 /*
484 * NFS is shut down. The admin can start it by
485 * writing to the threads file but NOT the pool_threads
486 * file, sorry. Report zero threads.
487 */
488 mutex_unlock(&nfsd_mutex);
489 strcpy(buf, "0\n");
490 return strlen(buf);
491 }
492
493 nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL);
494 rv = -ENOMEM;
495 if (nthreads == NULL)
496 goto out_free;
497
498 if (size > 0) {
499 for (i = 0; i < npools; i++) {
500 rv = get_int(&mesg, &nthreads[i]);
501 if (rv == -ENOENT)
502 break; /* fewer numbers than pools */
503 if (rv)
504 goto out_free; /* syntax error */
505 rv = -EINVAL;
506 if (nthreads[i] < 0)
507 goto out_free;
508 }
509 rv = nfsd_set_nrthreads(i, nthreads, net);
510 if (rv)
511 goto out_free;
512 }
513
514 rv = nfsd_get_nrthreads(npools, nthreads, net);
515 if (rv)
516 goto out_free;
517
518 mesg = buf;
519 size = SIMPLE_TRANSACTION_LIMIT;
520 for (i = 0; i < npools && size > 0; i++) {
521 snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' '));
522 len = strlen(mesg);
523 size -= len;
524 mesg += len;
525 }
526 rv = mesg - buf;
527out_free:
528 kfree(nthreads);
529 mutex_unlock(&nfsd_mutex);
530 return rv;
531}
532
533static ssize_t __write_versions(struct file *file, char *buf, size_t size)
534{
535 char *mesg = buf;
536 char *vers, *minorp, sign;
537 int len, num, remaining;
538 unsigned minor;
539 ssize_t tlen = 0;
540 char *sep;
541 struct net *net = file->f_dentry->d_sb->s_fs_info;
542 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
543
544 if (size>0) {
545 if (nn->nfsd_serv)
546 /* Cannot change versions without updating
547 * nn->nfsd_serv->sv_xdrsize, and reallocing
548 * rq_argp and rq_resp
549 */
550 return -EBUSY;
551 if (buf[size-1] != '\n')
552 return -EINVAL;
553 buf[size-1] = 0;
554
555 vers = mesg;
556 len = qword_get(&mesg, vers, size);
557 if (len <= 0) return -EINVAL;
558 do {
559 sign = *vers;
560 if (sign == '+' || sign == '-')
561 num = simple_strtol((vers+1), &minorp, 0);
562 else
563 num = simple_strtol(vers, &minorp, 0);
564 if (*minorp == '.') {
565 if (num != 4)
566 return -EINVAL;
567 minor = simple_strtoul(minorp+1, NULL, 0);
568 if (minor == 0)
569 return -EINVAL;
570 if (nfsd_minorversion(minor, sign == '-' ?
571 NFSD_CLEAR : NFSD_SET) < 0)
572 return -EINVAL;
573 goto next;
574 }
575 switch(num) {
576 case 2:
577 case 3:
578 case 4:
579 nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET);
580 break;
581 default:
582 return -EINVAL;
583 }
584 next:
585 vers += len + 1;
586 } while ((len = qword_get(&mesg, vers, size)) > 0);
587 /* If all get turned off, turn them back on, as
588 * having no versions is BAD
589 */
590 nfsd_reset_versions();
591 }
592
593 /* Now write current state into reply buffer */
594 len = 0;
595 sep = "";
596 remaining = SIMPLE_TRANSACTION_LIMIT;
597 for (num=2 ; num <= 4 ; num++)
598 if (nfsd_vers(num, NFSD_AVAIL)) {
599 len = snprintf(buf, remaining, "%s%c%d", sep,
600 nfsd_vers(num, NFSD_TEST)?'+':'-',
601 num);
602 sep = " ";
603
604 if (len > remaining)
605 break;
606 remaining -= len;
607 buf += len;
608 tlen += len;
609 }
610 if (nfsd_vers(4, NFSD_AVAIL))
611 for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION;
612 minor++) {
613 len = snprintf(buf, remaining, " %c4.%u",
614 (nfsd_vers(4, NFSD_TEST) &&
615 nfsd_minorversion(minor, NFSD_TEST)) ?
616 '+' : '-',
617 minor);
618
619 if (len > remaining)
620 break;
621 remaining -= len;
622 buf += len;
623 tlen += len;
624 }
625
626 len = snprintf(buf, remaining, "\n");
627 if (len > remaining)
628 return -EINVAL;
629 return tlen + len;
630}
631
632/**
633 * write_versions - Set or report the available NFS protocol versions
634 *
635 * Input:
636 * buf: ignored
637 * size: zero
638 * Output:
639 * On success: passed-in buffer filled with '\n'-terminated C
640 * string containing positive or negative integer
641 * values representing the current status of each
642 * protocol version;
643 * return code is the size in bytes of the string
644 * On error: return code is zero or a negative errno value
645 *
646 * OR
647 *
648 * Input:
649 * buf: C string containing whitespace-
650 * separated positive or negative
651 * integer values representing NFS
652 * protocol versions to enable ("+n")
653 * or disable ("-n")
654 * size: non-zero length of C string in @buf
655 * Output:
656 * On success: status of zero or more protocol versions has
657 * been updated; passed-in buffer filled with
658 * '\n'-terminated C string containing positive
659 * or negative integer values representing the
660 * current status of each protocol version;
661 * return code is the size in bytes of the string
662 * On error: return code is zero or a negative errno value
663 */
664static ssize_t write_versions(struct file *file, char *buf, size_t size)
665{
666 ssize_t rv;
667
668 mutex_lock(&nfsd_mutex);
669 rv = __write_versions(file, buf, size);
670 mutex_unlock(&nfsd_mutex);
671 return rv;
672}
673
674/*
675 * Zero-length write. Return a list of NFSD's current listener
676 * transports.
677 */
678static ssize_t __write_ports_names(char *buf, struct net *net)
679{
680 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
681
682 if (nn->nfsd_serv == NULL)
683 return 0;
684 return svc_xprt_names(nn->nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT);
685}
686
687/*
688 * A single 'fd' number was written, in which case it must be for
689 * a socket of a supported family/protocol, and we use it as an
690 * nfsd listener.
691 */
692static ssize_t __write_ports_addfd(char *buf, struct net *net)
693{
694 char *mesg = buf;
695 int fd, err;
696 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
697
698 err = get_int(&mesg, &fd);
699 if (err != 0 || fd < 0)
700 return -EINVAL;
701
702 if (svc_alien_sock(net, fd)) {
703 printk(KERN_ERR "%s: socket net is different to NFSd's one\n", __func__);
704 return -EINVAL;
705 }
706
707 err = nfsd_create_serv(net);
708 if (err != 0)
709 return err;
710
711 err = svc_addsock(nn->nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT);
712 if (err < 0) {
713 nfsd_destroy(net);
714 return err;
715 }
716
717 /* Decrease the count, but don't shut down the service */
718 nn->nfsd_serv->sv_nrthreads--;
719 return err;
720}
721
722/*
723 * A transport listener is added by writing it's transport name and
724 * a port number.
725 */
726static ssize_t __write_ports_addxprt(char *buf, struct net *net)
727{
728 char transport[16];
729 struct svc_xprt *xprt;
730 int port, err;
731 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
732
733 if (sscanf(buf, "%15s %5u", transport, &port) != 2)
734 return -EINVAL;
735
736 if (port < 1 || port > USHRT_MAX)
737 return -EINVAL;
738
739 err = nfsd_create_serv(net);
740 if (err != 0)
741 return err;
742
743 err = svc_create_xprt(nn->nfsd_serv, transport, net,
744 PF_INET, port, SVC_SOCK_ANONYMOUS);
745 if (err < 0)
746 goto out_err;
747
748 err = svc_create_xprt(nn->nfsd_serv, transport, net,
749 PF_INET6, port, SVC_SOCK_ANONYMOUS);
750 if (err < 0 && err != -EAFNOSUPPORT)
751 goto out_close;
752
753 /* Decrease the count, but don't shut down the service */
754 nn->nfsd_serv->sv_nrthreads--;
755 return 0;
756out_close:
757 xprt = svc_find_xprt(nn->nfsd_serv, transport, net, PF_INET, port);
758 if (xprt != NULL) {
759 svc_close_xprt(xprt);
760 svc_xprt_put(xprt);
761 }
762out_err:
763 nfsd_destroy(net);
764 return err;
765}
766
767static ssize_t __write_ports(struct file *file, char *buf, size_t size,
768 struct net *net)
769{
770 if (size == 0)
771 return __write_ports_names(buf, net);
772
773 if (isdigit(buf[0]))
774 return __write_ports_addfd(buf, net);
775
776 if (isalpha(buf[0]))
777 return __write_ports_addxprt(buf, net);
778
779 return -EINVAL;
780}
781
782/**
783 * write_ports - Pass a socket file descriptor or transport name to listen on
784 *
785 * Input:
786 * buf: ignored
787 * size: zero
788 * Output:
789 * On success: passed-in buffer filled with a '\n'-terminated C
790 * string containing a whitespace-separated list of
791 * named NFSD listeners;
792 * return code is the size in bytes of the string
793 * On error: return code is zero or a negative errno value
794 *
795 * OR
796 *
797 * Input:
798 * buf: C string containing an unsigned
799 * integer value representing a bound
800 * but unconnected socket that is to be
801 * used as an NFSD listener; listen(3)
802 * must be called for a SOCK_STREAM
803 * socket, otherwise it is ignored
804 * size: non-zero length of C string in @buf
805 * Output:
806 * On success: NFS service is started;
807 * passed-in buffer filled with a '\n'-terminated C
808 * string containing a unique alphanumeric name of
809 * the listener;
810 * return code is the size in bytes of the string
811 * On error: return code is a negative errno value
812 *
813 * OR
814 *
815 * Input:
816 * buf: C string containing a transport
817 * name and an unsigned integer value
818 * representing the port to listen on,
819 * separated by whitespace
820 * size: non-zero length of C string in @buf
821 * Output:
822 * On success: returns zero; NFS service is started
823 * On error: return code is a negative errno value
824 */
825static ssize_t write_ports(struct file *file, char *buf, size_t size)
826{
827 ssize_t rv;
828 struct net *net = file->f_dentry->d_sb->s_fs_info;
829
830 mutex_lock(&nfsd_mutex);
831 rv = __write_ports(file, buf, size, net);
832 mutex_unlock(&nfsd_mutex);
833 return rv;
834}
835
836
837int nfsd_max_blksize;
838
839/**
840 * write_maxblksize - Set or report the current NFS blksize
841 *
842 * Input:
843 * buf: ignored
844 * size: zero
845 *
846 * OR
847 *
848 * Input:
849 * buf: C string containing an unsigned
850 * integer value representing the new
851 * NFS blksize
852 * size: non-zero length of C string in @buf
853 * Output:
854 * On success: passed-in buffer filled with '\n'-terminated C string
855 * containing numeric value of the current NFS blksize
856 * setting;
857 * return code is the size in bytes of the string
858 * On error: return code is zero or a negative errno value
859 */
860static ssize_t write_maxblksize(struct file *file, char *buf, size_t size)
861{
862 char *mesg = buf;
863 struct net *net = file->f_dentry->d_sb->s_fs_info;
864 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
865
866 if (size > 0) {
867 int bsize;
868 int rv = get_int(&mesg, &bsize);
869 if (rv)
870 return rv;
871 /* force bsize into allowed range and
872 * required alignment.
873 */
874 if (bsize < 1024)
875 bsize = 1024;
876 if (bsize > NFSSVC_MAXBLKSIZE)
877 bsize = NFSSVC_MAXBLKSIZE;
878 bsize &= ~(1024-1);
879 mutex_lock(&nfsd_mutex);
880 if (nn->nfsd_serv) {
881 mutex_unlock(&nfsd_mutex);
882 return -EBUSY;
883 }
884 nfsd_max_blksize = bsize;
885 mutex_unlock(&nfsd_mutex);
886 }
887
888 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n",
889 nfsd_max_blksize);
890}
891
892#ifdef CONFIG_NFSD_V4
893static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size,
894 time_t *time, struct nfsd_net *nn)
895{
896 char *mesg = buf;
897 int rv, i;
898
899 if (size > 0) {
900 if (nn->nfsd_serv)
901 return -EBUSY;
902 rv = get_int(&mesg, &i);
903 if (rv)
904 return rv;
905 /*
906 * Some sanity checking. We don't have a reason for
907 * these particular numbers, but problems with the
908 * extremes are:
909 * - Too short: the briefest network outage may
910 * cause clients to lose all their locks. Also,
911 * the frequent polling may be wasteful.
912 * - Too long: do you really want reboot recovery
913 * to take more than an hour? Or to make other
914 * clients wait an hour before being able to
915 * revoke a dead client's locks?
916 */
917 if (i < 10 || i > 3600)
918 return -EINVAL;
919 *time = i;
920 }
921
922 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time);
923}
924
925static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size,
926 time_t *time, struct nfsd_net *nn)
927{
928 ssize_t rv;
929
930 mutex_lock(&nfsd_mutex);
931 rv = __nfsd4_write_time(file, buf, size, time, nn);
932 mutex_unlock(&nfsd_mutex);
933 return rv;
934}
935
936/**
937 * write_leasetime - Set or report the current NFSv4 lease time
938 *
939 * Input:
940 * buf: ignored
941 * size: zero
942 *
943 * OR
944 *
945 * Input:
946 * buf: C string containing an unsigned
947 * integer value representing the new
948 * NFSv4 lease expiry time
949 * size: non-zero length of C string in @buf
950 * Output:
951 * On success: passed-in buffer filled with '\n'-terminated C
952 * string containing unsigned integer value of the
953 * current lease expiry time;
954 * return code is the size in bytes of the string
955 * On error: return code is zero or a negative errno value
956 */
957static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
958{
959 struct net *net = file->f_dentry->d_sb->s_fs_info;
960 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
961 return nfsd4_write_time(file, buf, size, &nn->nfsd4_lease, nn);
962}
963
964/**
965 * write_gracetime - Set or report current NFSv4 grace period time
966 *
967 * As above, but sets the time of the NFSv4 grace period.
968 *
969 * Note this should never be set to less than the *previous*
970 * lease-period time, but we don't try to enforce this. (In the common
971 * case (a new boot), we don't know what the previous lease time was
972 * anyway.)
973 */
974static ssize_t write_gracetime(struct file *file, char *buf, size_t size)
975{
976 struct net *net = file->f_dentry->d_sb->s_fs_info;
977 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
978 return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn);
979}
980
981static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size,
982 struct nfsd_net *nn)
983{
984 char *mesg = buf;
985 char *recdir;
986 int len, status;
987
988 if (size > 0) {
989 if (nn->nfsd_serv)
990 return -EBUSY;
991 if (size > PATH_MAX || buf[size-1] != '\n')
992 return -EINVAL;
993 buf[size-1] = 0;
994
995 recdir = mesg;
996 len = qword_get(&mesg, recdir, size);
997 if (len <= 0)
998 return -EINVAL;
999
1000 status = nfs4_reset_recoverydir(recdir);
1001 if (status)
1002 return status;
1003 }
1004
1005 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n",
1006 nfs4_recoverydir());
1007}
1008
1009/**
1010 * write_recoverydir - Set or report the pathname of the recovery directory
1011 *
1012 * Input:
1013 * buf: ignored
1014 * size: zero
1015 *
1016 * OR
1017 *
1018 * Input:
1019 * buf: C string containing the pathname
1020 * of the directory on a local file
1021 * system containing permanent NFSv4
1022 * recovery data
1023 * size: non-zero length of C string in @buf
1024 * Output:
1025 * On success: passed-in buffer filled with '\n'-terminated C string
1026 * containing the current recovery pathname setting;
1027 * return code is the size in bytes of the string
1028 * On error: return code is zero or a negative errno value
1029 */
1030static ssize_t write_recoverydir(struct file *file, char *buf, size_t size)
1031{
1032 ssize_t rv;
1033 struct net *net = file->f_dentry->d_sb->s_fs_info;
1034 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
1035
1036 mutex_lock(&nfsd_mutex);
1037 rv = __write_recoverydir(file, buf, size, nn);
1038 mutex_unlock(&nfsd_mutex);
1039 return rv;
1040}
1041
1042#endif
1043
1044/*----------------------------------------------------------------------------*/
1045/*
1046 * populating the filesystem.
1047 */
1048
1049static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
1050{
1051 static struct tree_descr nfsd_files[] = {
1052 [NFSD_List] = {"exports", &exports_nfsd_operations, S_IRUGO},
1053 [NFSD_Export_features] = {"export_features",
1054 &export_features_operations, S_IRUGO},
1055 [NFSD_FO_UnlockIP] = {"unlock_ip",
1056 &transaction_ops, S_IWUSR|S_IRUSR},
1057 [NFSD_FO_UnlockFS] = {"unlock_filesystem",
1058 &transaction_ops, S_IWUSR|S_IRUSR},
1059 [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR},
1060 [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
1061 [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR},
1062 [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO},
1063 [NFSD_Reply_Cache_Stats] = {"reply_cache_stats", &reply_cache_stats_operations, S_IRUGO},
1064 [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR},
1065 [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO},
1066 [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO},
1067#if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE)
1068 [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO},
1069#endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */
1070#ifdef CONFIG_NFSD_V4
1071 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR},
1072 [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR},
1073 [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR},
1074#endif
1075 /* last one */ {""}
1076 };
1077 struct net *net = data;
1078 int ret;
1079
1080 ret = simple_fill_super(sb, 0x6e667364, nfsd_files);
1081 if (ret)
1082 return ret;
1083 sb->s_fs_info = get_net(net);
1084 return 0;
1085}
1086
1087static struct dentry *nfsd_mount(struct file_system_type *fs_type,
1088 int flags, const char *dev_name, void *data)
1089{
1090 return mount_ns(fs_type, flags, current->nsproxy->net_ns, nfsd_fill_super);
1091}
1092
1093static void nfsd_umount(struct super_block *sb)
1094{
1095 struct net *net = sb->s_fs_info;
1096
1097 kill_litter_super(sb);
1098 put_net(net);
1099}
1100
1101static struct file_system_type nfsd_fs_type = {
1102 .owner = THIS_MODULE,
1103 .name = "nfsd",
1104 .mount = nfsd_mount,
1105 .kill_sb = nfsd_umount,
1106};
1107MODULE_ALIAS_FS("nfsd");
1108
1109#ifdef CONFIG_PROC_FS
1110static int create_proc_exports_entry(void)
1111{
1112 struct proc_dir_entry *entry;
1113
1114 entry = proc_mkdir("fs/nfs", NULL);
1115 if (!entry)
1116 return -ENOMEM;
1117 entry = proc_create("exports", 0, entry,
1118 &exports_proc_operations);
1119 if (!entry) {
1120 remove_proc_entry("fs/nfs", NULL);
1121 return -ENOMEM;
1122 }
1123 return 0;
1124}
1125#else /* CONFIG_PROC_FS */
1126static int create_proc_exports_entry(void)
1127{
1128 return 0;
1129}
1130#endif
1131
1132int nfsd_net_id;
1133
1134static __net_init int nfsd_init_net(struct net *net)
1135{
1136 int retval;
1137 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
1138
1139 retval = nfsd_export_init(net);
1140 if (retval)
1141 goto out_export_error;
1142 retval = nfsd_idmap_init(net);
1143 if (retval)
1144 goto out_idmap_error;
1145 nn->nfsd4_lease = 90; /* default lease time */
1146 nn->nfsd4_grace = 90;
1147 return 0;
1148
1149out_idmap_error:
1150 nfsd_export_shutdown(net);
1151out_export_error:
1152 return retval;
1153}
1154
1155static __net_exit void nfsd_exit_net(struct net *net)
1156{
1157 nfsd_idmap_shutdown(net);
1158 nfsd_export_shutdown(net);
1159}
1160
1161static struct pernet_operations nfsd_net_ops = {
1162 .init = nfsd_init_net,
1163 .exit = nfsd_exit_net,
1164 .id = &nfsd_net_id,
1165 .size = sizeof(struct nfsd_net),
1166};
1167
1168static int __init init_nfsd(void)
1169{
1170 int retval;
1171 printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
1172
1173 retval = register_cld_notifier();
1174 if (retval)
1175 return retval;
1176 retval = register_pernet_subsys(&nfsd_net_ops);
1177 if (retval < 0)
1178 goto out_unregister_notifier;
1179 retval = nfsd4_init_slabs();
1180 if (retval)
1181 goto out_unregister_pernet;
1182 nfs4_state_init();
1183 retval = nfsd_fault_inject_init(); /* nfsd fault injection controls */
1184 if (retval)
1185 goto out_free_slabs;
1186 nfsd_stat_init(); /* Statistics */
1187 retval = nfsd_reply_cache_init();
1188 if (retval)
1189 goto out_free_stat;
1190 nfsd_lockd_init(); /* lockd->nfsd callbacks */
1191 retval = create_proc_exports_entry();
1192 if (retval)
1193 goto out_free_lockd;
1194 retval = register_filesystem(&nfsd_fs_type);
1195 if (retval)
1196 goto out_free_all;
1197 return 0;
1198out_free_all:
1199 remove_proc_entry("fs/nfs/exports", NULL);
1200 remove_proc_entry("fs/nfs", NULL);
1201out_free_lockd:
1202 nfsd_lockd_shutdown();
1203 nfsd_reply_cache_shutdown();
1204out_free_stat:
1205 nfsd_stat_shutdown();
1206 nfsd_fault_inject_cleanup();
1207out_free_slabs:
1208 nfsd4_free_slabs();
1209out_unregister_pernet:
1210 unregister_pernet_subsys(&nfsd_net_ops);
1211out_unregister_notifier:
1212 unregister_cld_notifier();
1213 return retval;
1214}
1215
1216static void __exit exit_nfsd(void)
1217{
1218 nfsd_reply_cache_shutdown();
1219 remove_proc_entry("fs/nfs/exports", NULL);
1220 remove_proc_entry("fs/nfs", NULL);
1221 nfsd_stat_shutdown();
1222 nfsd_lockd_shutdown();
1223 nfsd4_free_slabs();
1224 nfsd_fault_inject_cleanup();
1225 unregister_filesystem(&nfsd_fs_type);
1226 unregister_pernet_subsys(&nfsd_net_ops);
1227 unregister_cld_notifier();
1228}
1229
1230MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1231MODULE_LICENSE("GPL");
1232module_init(init_nfsd)
1233module_exit(exit_nfsd)
1/*
2 * Syscall interface to knfsd.
3 *
4 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
5 */
6
7#include <linux/slab.h>
8#include <linux/namei.h>
9#include <linux/ctype.h>
10
11#include <linux/sunrpc/svcsock.h>
12#include <linux/lockd/lockd.h>
13#include <linux/sunrpc/clnt.h>
14#include <linux/sunrpc/gss_api.h>
15#include <linux/sunrpc/gss_krb5_enctypes.h>
16#include <linux/sunrpc/rpc_pipe_fs.h>
17#include <linux/module.h>
18
19#include "idmap.h"
20#include "nfsd.h"
21#include "cache.h"
22#include "fault_inject.h"
23#include "netns.h"
24
25/*
26 * We have a single directory with several nodes in it.
27 */
28enum {
29 NFSD_Root = 1,
30 NFSD_List,
31 NFSD_Export_features,
32 NFSD_Fh,
33 NFSD_FO_UnlockIP,
34 NFSD_FO_UnlockFS,
35 NFSD_Threads,
36 NFSD_Pool_Threads,
37 NFSD_Pool_Stats,
38 NFSD_Versions,
39 NFSD_Ports,
40 NFSD_MaxBlkSize,
41 NFSD_SupportedEnctypes,
42 /*
43 * The below MUST come last. Otherwise we leave a hole in nfsd_files[]
44 * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops
45 */
46#ifdef CONFIG_NFSD_V4
47 NFSD_Leasetime,
48 NFSD_Gracetime,
49 NFSD_RecoveryDir,
50#endif
51};
52
53/*
54 * write() for these nodes.
55 */
56static ssize_t write_filehandle(struct file *file, char *buf, size_t size);
57static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size);
58static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size);
59static ssize_t write_threads(struct file *file, char *buf, size_t size);
60static ssize_t write_pool_threads(struct file *file, char *buf, size_t size);
61static ssize_t write_versions(struct file *file, char *buf, size_t size);
62static ssize_t write_ports(struct file *file, char *buf, size_t size);
63static ssize_t write_maxblksize(struct file *file, char *buf, size_t size);
64#ifdef CONFIG_NFSD_V4
65static ssize_t write_leasetime(struct file *file, char *buf, size_t size);
66static ssize_t write_gracetime(struct file *file, char *buf, size_t size);
67static ssize_t write_recoverydir(struct file *file, char *buf, size_t size);
68#endif
69
70static ssize_t (*write_op[])(struct file *, char *, size_t) = {
71 [NFSD_Fh] = write_filehandle,
72 [NFSD_FO_UnlockIP] = write_unlock_ip,
73 [NFSD_FO_UnlockFS] = write_unlock_fs,
74 [NFSD_Threads] = write_threads,
75 [NFSD_Pool_Threads] = write_pool_threads,
76 [NFSD_Versions] = write_versions,
77 [NFSD_Ports] = write_ports,
78 [NFSD_MaxBlkSize] = write_maxblksize,
79#ifdef CONFIG_NFSD_V4
80 [NFSD_Leasetime] = write_leasetime,
81 [NFSD_Gracetime] = write_gracetime,
82 [NFSD_RecoveryDir] = write_recoverydir,
83#endif
84};
85
86static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
87{
88 ino_t ino = file->f_path.dentry->d_inode->i_ino;
89 char *data;
90 ssize_t rv;
91
92 if (ino >= ARRAY_SIZE(write_op) || !write_op[ino])
93 return -EINVAL;
94
95 data = simple_transaction_get(file, buf, size);
96 if (IS_ERR(data))
97 return PTR_ERR(data);
98
99 rv = write_op[ino](file, data, size);
100 if (rv >= 0) {
101 simple_transaction_set(file, rv);
102 rv = size;
103 }
104 return rv;
105}
106
107static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos)
108{
109 if (! file->private_data) {
110 /* An attempt to read a transaction file without writing
111 * causes a 0-byte write so that the file can return
112 * state information
113 */
114 ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos);
115 if (rv < 0)
116 return rv;
117 }
118 return simple_transaction_read(file, buf, size, pos);
119}
120
121static const struct file_operations transaction_ops = {
122 .write = nfsctl_transaction_write,
123 .read = nfsctl_transaction_read,
124 .release = simple_transaction_release,
125 .llseek = default_llseek,
126};
127
128static int exports_open(struct inode *inode, struct file *file)
129{
130 int err;
131 struct seq_file *seq;
132 struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
133
134 err = seq_open(file, &nfs_exports_op);
135 if (err)
136 return err;
137
138 seq = file->private_data;
139 seq->private = nn->svc_export_cache;
140 return 0;
141}
142
143static const struct file_operations exports_operations = {
144 .open = exports_open,
145 .read = seq_read,
146 .llseek = seq_lseek,
147 .release = seq_release,
148 .owner = THIS_MODULE,
149};
150
151static int export_features_show(struct seq_file *m, void *v)
152{
153 seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS);
154 return 0;
155}
156
157static int export_features_open(struct inode *inode, struct file *file)
158{
159 return single_open(file, export_features_show, NULL);
160}
161
162static struct file_operations export_features_operations = {
163 .open = export_features_open,
164 .read = seq_read,
165 .llseek = seq_lseek,
166 .release = single_release,
167};
168
169#if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE)
170static int supported_enctypes_show(struct seq_file *m, void *v)
171{
172 seq_printf(m, KRB5_SUPPORTED_ENCTYPES);
173 return 0;
174}
175
176static int supported_enctypes_open(struct inode *inode, struct file *file)
177{
178 return single_open(file, supported_enctypes_show, NULL);
179}
180
181static struct file_operations supported_enctypes_ops = {
182 .open = supported_enctypes_open,
183 .read = seq_read,
184 .llseek = seq_lseek,
185 .release = single_release,
186};
187#endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */
188
189extern int nfsd_pool_stats_open(struct inode *inode, struct file *file);
190extern int nfsd_pool_stats_release(struct inode *inode, struct file *file);
191
192static const struct file_operations pool_stats_operations = {
193 .open = nfsd_pool_stats_open,
194 .read = seq_read,
195 .llseek = seq_lseek,
196 .release = nfsd_pool_stats_release,
197 .owner = THIS_MODULE,
198};
199
200/*----------------------------------------------------------------------------*/
201/*
202 * payload - write methods
203 */
204
205
206/**
207 * write_unlock_ip - Release all locks used by a client
208 *
209 * Experimental.
210 *
211 * Input:
212 * buf: '\n'-terminated C string containing a
213 * presentation format IP address
214 * size: length of C string in @buf
215 * Output:
216 * On success: returns zero if all specified locks were released;
217 * returns one if one or more locks were not released
218 * On error: return code is negative errno value
219 */
220static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size)
221{
222 struct sockaddr_storage address;
223 struct sockaddr *sap = (struct sockaddr *)&address;
224 size_t salen = sizeof(address);
225 char *fo_path;
226
227 /* sanity check */
228 if (size == 0)
229 return -EINVAL;
230
231 if (buf[size-1] != '\n')
232 return -EINVAL;
233
234 fo_path = buf;
235 if (qword_get(&buf, fo_path, size) < 0)
236 return -EINVAL;
237
238 if (rpc_pton(&init_net, fo_path, size, sap, salen) == 0)
239 return -EINVAL;
240
241 return nlmsvc_unlock_all_by_ip(sap);
242}
243
244/**
245 * write_unlock_fs - Release all locks on a local file system
246 *
247 * Experimental.
248 *
249 * Input:
250 * buf: '\n'-terminated C string containing the
251 * absolute pathname of a local file system
252 * size: length of C string in @buf
253 * Output:
254 * On success: returns zero if all specified locks were released;
255 * returns one if one or more locks were not released
256 * On error: return code is negative errno value
257 */
258static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size)
259{
260 struct path path;
261 char *fo_path;
262 int error;
263
264 /* sanity check */
265 if (size == 0)
266 return -EINVAL;
267
268 if (buf[size-1] != '\n')
269 return -EINVAL;
270
271 fo_path = buf;
272 if (qword_get(&buf, fo_path, size) < 0)
273 return -EINVAL;
274
275 error = kern_path(fo_path, 0, &path);
276 if (error)
277 return error;
278
279 /*
280 * XXX: Needs better sanity checking. Otherwise we could end up
281 * releasing locks on the wrong file system.
282 *
283 * For example:
284 * 1. Does the path refer to a directory?
285 * 2. Is that directory a mount point, or
286 * 3. Is that directory the root of an exported file system?
287 */
288 error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb);
289
290 path_put(&path);
291 return error;
292}
293
294/**
295 * write_filehandle - Get a variable-length NFS file handle by path
296 *
297 * On input, the buffer contains a '\n'-terminated C string comprised of
298 * three alphanumeric words separated by whitespace. The string may
299 * contain escape sequences.
300 *
301 * Input:
302 * buf:
303 * domain: client domain name
304 * path: export pathname
305 * maxsize: numeric maximum size of
306 * @buf
307 * size: length of C string in @buf
308 * Output:
309 * On success: passed-in buffer filled with '\n'-terminated C
310 * string containing a ASCII hex text version
311 * of the NFS file handle;
312 * return code is the size in bytes of the string
313 * On error: return code is negative errno value
314 */
315static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
316{
317 char *dname, *path;
318 int uninitialized_var(maxsize);
319 char *mesg = buf;
320 int len;
321 struct auth_domain *dom;
322 struct knfsd_fh fh;
323
324 if (size == 0)
325 return -EINVAL;
326
327 if (buf[size-1] != '\n')
328 return -EINVAL;
329 buf[size-1] = 0;
330
331 dname = mesg;
332 len = qword_get(&mesg, dname, size);
333 if (len <= 0)
334 return -EINVAL;
335
336 path = dname+len+1;
337 len = qword_get(&mesg, path, size);
338 if (len <= 0)
339 return -EINVAL;
340
341 len = get_int(&mesg, &maxsize);
342 if (len)
343 return len;
344
345 if (maxsize < NFS_FHSIZE)
346 return -EINVAL;
347 if (maxsize > NFS3_FHSIZE)
348 maxsize = NFS3_FHSIZE;
349
350 if (qword_get(&mesg, mesg, size)>0)
351 return -EINVAL;
352
353 /* we have all the words, they are in buf.. */
354 dom = unix_domain_find(dname);
355 if (!dom)
356 return -ENOMEM;
357
358 len = exp_rootfh(&init_net, dom, path, &fh, maxsize);
359 auth_domain_put(dom);
360 if (len)
361 return len;
362
363 mesg = buf;
364 len = SIMPLE_TRANSACTION_LIMIT;
365 qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
366 mesg[-1] = '\n';
367 return mesg - buf;
368}
369
370/**
371 * write_threads - Start NFSD, or report the current number of running threads
372 *
373 * Input:
374 * buf: ignored
375 * size: zero
376 * Output:
377 * On success: passed-in buffer filled with '\n'-terminated C
378 * string numeric value representing the number of
379 * running NFSD threads;
380 * return code is the size in bytes of the string
381 * On error: return code is zero
382 *
383 * OR
384 *
385 * Input:
386 * buf: C string containing an unsigned
387 * integer value representing the
388 * number of NFSD threads to start
389 * size: non-zero length of C string in @buf
390 * Output:
391 * On success: NFS service is started;
392 * passed-in buffer filled with '\n'-terminated C
393 * string numeric value representing the number of
394 * running NFSD threads;
395 * return code is the size in bytes of the string
396 * On error: return code is zero or a negative errno value
397 */
398static ssize_t write_threads(struct file *file, char *buf, size_t size)
399{
400 char *mesg = buf;
401 int rv;
402 if (size > 0) {
403 int newthreads;
404 rv = get_int(&mesg, &newthreads);
405 if (rv)
406 return rv;
407 if (newthreads < 0)
408 return -EINVAL;
409 rv = nfsd_svc(NFS_PORT, newthreads);
410 if (rv < 0)
411 return rv;
412 } else
413 rv = nfsd_nrthreads();
414
415 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv);
416}
417
418/**
419 * write_pool_threads - Set or report the current number of threads per pool
420 *
421 * Input:
422 * buf: ignored
423 * size: zero
424 *
425 * OR
426 *
427 * Input:
428 * buf: C string containing whitespace-
429 * separated unsigned integer values
430 * representing the number of NFSD
431 * threads to start in each pool
432 * size: non-zero length of C string in @buf
433 * Output:
434 * On success: passed-in buffer filled with '\n'-terminated C
435 * string containing integer values representing the
436 * number of NFSD threads in each pool;
437 * return code is the size in bytes of the string
438 * On error: return code is zero or a negative errno value
439 */
440static ssize_t write_pool_threads(struct file *file, char *buf, size_t size)
441{
442 /* if size > 0, look for an array of number of threads per node
443 * and apply them then write out number of threads per node as reply
444 */
445 char *mesg = buf;
446 int i;
447 int rv;
448 int len;
449 int npools;
450 int *nthreads;
451
452 mutex_lock(&nfsd_mutex);
453 npools = nfsd_nrpools();
454 if (npools == 0) {
455 /*
456 * NFS is shut down. The admin can start it by
457 * writing to the threads file but NOT the pool_threads
458 * file, sorry. Report zero threads.
459 */
460 mutex_unlock(&nfsd_mutex);
461 strcpy(buf, "0\n");
462 return strlen(buf);
463 }
464
465 nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL);
466 rv = -ENOMEM;
467 if (nthreads == NULL)
468 goto out_free;
469
470 if (size > 0) {
471 for (i = 0; i < npools; i++) {
472 rv = get_int(&mesg, &nthreads[i]);
473 if (rv == -ENOENT)
474 break; /* fewer numbers than pools */
475 if (rv)
476 goto out_free; /* syntax error */
477 rv = -EINVAL;
478 if (nthreads[i] < 0)
479 goto out_free;
480 }
481 rv = nfsd_set_nrthreads(i, nthreads);
482 if (rv)
483 goto out_free;
484 }
485
486 rv = nfsd_get_nrthreads(npools, nthreads);
487 if (rv)
488 goto out_free;
489
490 mesg = buf;
491 size = SIMPLE_TRANSACTION_LIMIT;
492 for (i = 0; i < npools && size > 0; i++) {
493 snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' '));
494 len = strlen(mesg);
495 size -= len;
496 mesg += len;
497 }
498 rv = mesg - buf;
499out_free:
500 kfree(nthreads);
501 mutex_unlock(&nfsd_mutex);
502 return rv;
503}
504
505static ssize_t __write_versions(struct file *file, char *buf, size_t size)
506{
507 char *mesg = buf;
508 char *vers, *minorp, sign;
509 int len, num, remaining;
510 unsigned minor;
511 ssize_t tlen = 0;
512 char *sep;
513
514 if (size>0) {
515 if (nfsd_serv)
516 /* Cannot change versions without updating
517 * nfsd_serv->sv_xdrsize, and reallocing
518 * rq_argp and rq_resp
519 */
520 return -EBUSY;
521 if (buf[size-1] != '\n')
522 return -EINVAL;
523 buf[size-1] = 0;
524
525 vers = mesg;
526 len = qword_get(&mesg, vers, size);
527 if (len <= 0) return -EINVAL;
528 do {
529 sign = *vers;
530 if (sign == '+' || sign == '-')
531 num = simple_strtol((vers+1), &minorp, 0);
532 else
533 num = simple_strtol(vers, &minorp, 0);
534 if (*minorp == '.') {
535 if (num < 4)
536 return -EINVAL;
537 minor = simple_strtoul(minorp+1, NULL, 0);
538 if (minor == 0)
539 return -EINVAL;
540 if (nfsd_minorversion(minor, sign == '-' ?
541 NFSD_CLEAR : NFSD_SET) < 0)
542 return -EINVAL;
543 goto next;
544 }
545 switch(num) {
546 case 2:
547 case 3:
548 case 4:
549 nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET);
550 break;
551 default:
552 return -EINVAL;
553 }
554 next:
555 vers += len + 1;
556 } while ((len = qword_get(&mesg, vers, size)) > 0);
557 /* If all get turned off, turn them back on, as
558 * having no versions is BAD
559 */
560 nfsd_reset_versions();
561 }
562
563 /* Now write current state into reply buffer */
564 len = 0;
565 sep = "";
566 remaining = SIMPLE_TRANSACTION_LIMIT;
567 for (num=2 ; num <= 4 ; num++)
568 if (nfsd_vers(num, NFSD_AVAIL)) {
569 len = snprintf(buf, remaining, "%s%c%d", sep,
570 nfsd_vers(num, NFSD_TEST)?'+':'-',
571 num);
572 sep = " ";
573
574 if (len > remaining)
575 break;
576 remaining -= len;
577 buf += len;
578 tlen += len;
579 }
580 if (nfsd_vers(4, NFSD_AVAIL))
581 for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION;
582 minor++) {
583 len = snprintf(buf, remaining, " %c4.%u",
584 (nfsd_vers(4, NFSD_TEST) &&
585 nfsd_minorversion(minor, NFSD_TEST)) ?
586 '+' : '-',
587 minor);
588
589 if (len > remaining)
590 break;
591 remaining -= len;
592 buf += len;
593 tlen += len;
594 }
595
596 len = snprintf(buf, remaining, "\n");
597 if (len > remaining)
598 return -EINVAL;
599 return tlen + len;
600}
601
602/**
603 * write_versions - Set or report the available NFS protocol versions
604 *
605 * Input:
606 * buf: ignored
607 * size: zero
608 * Output:
609 * On success: passed-in buffer filled with '\n'-terminated C
610 * string containing positive or negative integer
611 * values representing the current status of each
612 * protocol version;
613 * return code is the size in bytes of the string
614 * On error: return code is zero or a negative errno value
615 *
616 * OR
617 *
618 * Input:
619 * buf: C string containing whitespace-
620 * separated positive or negative
621 * integer values representing NFS
622 * protocol versions to enable ("+n")
623 * or disable ("-n")
624 * size: non-zero length of C string in @buf
625 * Output:
626 * On success: status of zero or more protocol versions has
627 * been updated; passed-in buffer filled with
628 * '\n'-terminated C string containing positive
629 * or negative integer values representing the
630 * current status of each protocol version;
631 * return code is the size in bytes of the string
632 * On error: return code is zero or a negative errno value
633 */
634static ssize_t write_versions(struct file *file, char *buf, size_t size)
635{
636 ssize_t rv;
637
638 mutex_lock(&nfsd_mutex);
639 rv = __write_versions(file, buf, size);
640 mutex_unlock(&nfsd_mutex);
641 return rv;
642}
643
644/*
645 * Zero-length write. Return a list of NFSD's current listener
646 * transports.
647 */
648static ssize_t __write_ports_names(char *buf)
649{
650 if (nfsd_serv == NULL)
651 return 0;
652 return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT);
653}
654
655/*
656 * A single 'fd' number was written, in which case it must be for
657 * a socket of a supported family/protocol, and we use it as an
658 * nfsd listener.
659 */
660static ssize_t __write_ports_addfd(char *buf)
661{
662 char *mesg = buf;
663 int fd, err;
664 struct net *net = &init_net;
665
666 err = get_int(&mesg, &fd);
667 if (err != 0 || fd < 0)
668 return -EINVAL;
669
670 err = nfsd_create_serv();
671 if (err != 0)
672 return err;
673
674 err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT);
675 if (err < 0) {
676 nfsd_destroy(net);
677 return err;
678 }
679
680 /* Decrease the count, but don't shut down the service */
681 nfsd_serv->sv_nrthreads--;
682 return err;
683}
684
685/*
686 * A '-' followed by the 'name' of a socket means we close the socket.
687 */
688static ssize_t __write_ports_delfd(char *buf)
689{
690 char *toclose;
691 int len = 0;
692
693 toclose = kstrdup(buf + 1, GFP_KERNEL);
694 if (toclose == NULL)
695 return -ENOMEM;
696
697 if (nfsd_serv != NULL)
698 len = svc_sock_names(nfsd_serv, buf,
699 SIMPLE_TRANSACTION_LIMIT, toclose);
700 kfree(toclose);
701 return len;
702}
703
704/*
705 * A transport listener is added by writing it's transport name and
706 * a port number.
707 */
708static ssize_t __write_ports_addxprt(char *buf)
709{
710 char transport[16];
711 struct svc_xprt *xprt;
712 int port, err;
713 struct net *net = &init_net;
714
715 if (sscanf(buf, "%15s %4u", transport, &port) != 2)
716 return -EINVAL;
717
718 if (port < 1 || port > USHRT_MAX)
719 return -EINVAL;
720
721 err = nfsd_create_serv();
722 if (err != 0)
723 return err;
724
725 err = svc_create_xprt(nfsd_serv, transport, net,
726 PF_INET, port, SVC_SOCK_ANONYMOUS);
727 if (err < 0)
728 goto out_err;
729
730 err = svc_create_xprt(nfsd_serv, transport, net,
731 PF_INET6, port, SVC_SOCK_ANONYMOUS);
732 if (err < 0 && err != -EAFNOSUPPORT)
733 goto out_close;
734
735 /* Decrease the count, but don't shut down the service */
736 nfsd_serv->sv_nrthreads--;
737 return 0;
738out_close:
739 xprt = svc_find_xprt(nfsd_serv, transport, net, PF_INET, port);
740 if (xprt != NULL) {
741 svc_close_xprt(xprt);
742 svc_xprt_put(xprt);
743 }
744out_err:
745 nfsd_destroy(net);
746 return err;
747}
748
749/*
750 * A transport listener is removed by writing a "-", it's transport
751 * name, and it's port number.
752 */
753static ssize_t __write_ports_delxprt(char *buf)
754{
755 struct svc_xprt *xprt;
756 char transport[16];
757 int port;
758
759 if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2)
760 return -EINVAL;
761
762 if (port < 1 || port > USHRT_MAX || nfsd_serv == NULL)
763 return -EINVAL;
764
765 xprt = svc_find_xprt(nfsd_serv, transport, &init_net, AF_UNSPEC, port);
766 if (xprt == NULL)
767 return -ENOTCONN;
768
769 svc_close_xprt(xprt);
770 svc_xprt_put(xprt);
771 return 0;
772}
773
774static ssize_t __write_ports(struct file *file, char *buf, size_t size)
775{
776 if (size == 0)
777 return __write_ports_names(buf);
778
779 if (isdigit(buf[0]))
780 return __write_ports_addfd(buf);
781
782 if (buf[0] == '-' && isdigit(buf[1]))
783 return __write_ports_delfd(buf);
784
785 if (isalpha(buf[0]))
786 return __write_ports_addxprt(buf);
787
788 if (buf[0] == '-' && isalpha(buf[1]))
789 return __write_ports_delxprt(buf);
790
791 return -EINVAL;
792}
793
794/**
795 * write_ports - Pass a socket file descriptor or transport name to listen on
796 *
797 * Input:
798 * buf: ignored
799 * size: zero
800 * Output:
801 * On success: passed-in buffer filled with a '\n'-terminated C
802 * string containing a whitespace-separated list of
803 * named NFSD listeners;
804 * return code is the size in bytes of the string
805 * On error: return code is zero or a negative errno value
806 *
807 * OR
808 *
809 * Input:
810 * buf: C string containing an unsigned
811 * integer value representing a bound
812 * but unconnected socket that is to be
813 * used as an NFSD listener; listen(3)
814 * must be called for a SOCK_STREAM
815 * socket, otherwise it is ignored
816 * size: non-zero length of C string in @buf
817 * Output:
818 * On success: NFS service is started;
819 * passed-in buffer filled with a '\n'-terminated C
820 * string containing a unique alphanumeric name of
821 * the listener;
822 * return code is the size in bytes of the string
823 * On error: return code is a negative errno value
824 *
825 * OR
826 *
827 * Input:
828 * buf: C string containing a "-" followed
829 * by an integer value representing a
830 * previously passed in socket file
831 * descriptor
832 * size: non-zero length of C string in @buf
833 * Output:
834 * On success: NFS service no longer listens on that socket;
835 * passed-in buffer filled with a '\n'-terminated C
836 * string containing a unique name of the listener;
837 * return code is the size in bytes of the string
838 * On error: return code is a negative errno value
839 *
840 * OR
841 *
842 * Input:
843 * buf: C string containing a transport
844 * name and an unsigned integer value
845 * representing the port to listen on,
846 * separated by whitespace
847 * size: non-zero length of C string in @buf
848 * Output:
849 * On success: returns zero; NFS service is started
850 * On error: return code is a negative errno value
851 *
852 * OR
853 *
854 * Input:
855 * buf: C string containing a "-" followed
856 * by a transport name and an unsigned
857 * integer value representing the port
858 * to listen on, separated by whitespace
859 * size: non-zero length of C string in @buf
860 * Output:
861 * On success: returns zero; NFS service no longer listens
862 * on that transport
863 * On error: return code is a negative errno value
864 */
865static ssize_t write_ports(struct file *file, char *buf, size_t size)
866{
867 ssize_t rv;
868
869 mutex_lock(&nfsd_mutex);
870 rv = __write_ports(file, buf, size);
871 mutex_unlock(&nfsd_mutex);
872 return rv;
873}
874
875
876int nfsd_max_blksize;
877
878/**
879 * write_maxblksize - Set or report the current NFS blksize
880 *
881 * Input:
882 * buf: ignored
883 * size: zero
884 *
885 * OR
886 *
887 * Input:
888 * buf: C string containing an unsigned
889 * integer value representing the new
890 * NFS blksize
891 * size: non-zero length of C string in @buf
892 * Output:
893 * On success: passed-in buffer filled with '\n'-terminated C string
894 * containing numeric value of the current NFS blksize
895 * setting;
896 * return code is the size in bytes of the string
897 * On error: return code is zero or a negative errno value
898 */
899static ssize_t write_maxblksize(struct file *file, char *buf, size_t size)
900{
901 char *mesg = buf;
902 if (size > 0) {
903 int bsize;
904 int rv = get_int(&mesg, &bsize);
905 if (rv)
906 return rv;
907 /* force bsize into allowed range and
908 * required alignment.
909 */
910 if (bsize < 1024)
911 bsize = 1024;
912 if (bsize > NFSSVC_MAXBLKSIZE)
913 bsize = NFSSVC_MAXBLKSIZE;
914 bsize &= ~(1024-1);
915 mutex_lock(&nfsd_mutex);
916 if (nfsd_serv) {
917 mutex_unlock(&nfsd_mutex);
918 return -EBUSY;
919 }
920 nfsd_max_blksize = bsize;
921 mutex_unlock(&nfsd_mutex);
922 }
923
924 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n",
925 nfsd_max_blksize);
926}
927
928#ifdef CONFIG_NFSD_V4
929static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time)
930{
931 char *mesg = buf;
932 int rv, i;
933
934 if (size > 0) {
935 if (nfsd_serv)
936 return -EBUSY;
937 rv = get_int(&mesg, &i);
938 if (rv)
939 return rv;
940 /*
941 * Some sanity checking. We don't have a reason for
942 * these particular numbers, but problems with the
943 * extremes are:
944 * - Too short: the briefest network outage may
945 * cause clients to lose all their locks. Also,
946 * the frequent polling may be wasteful.
947 * - Too long: do you really want reboot recovery
948 * to take more than an hour? Or to make other
949 * clients wait an hour before being able to
950 * revoke a dead client's locks?
951 */
952 if (i < 10 || i > 3600)
953 return -EINVAL;
954 *time = i;
955 }
956
957 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time);
958}
959
960static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time)
961{
962 ssize_t rv;
963
964 mutex_lock(&nfsd_mutex);
965 rv = __nfsd4_write_time(file, buf, size, time);
966 mutex_unlock(&nfsd_mutex);
967 return rv;
968}
969
970/**
971 * write_leasetime - Set or report the current NFSv4 lease time
972 *
973 * Input:
974 * buf: ignored
975 * size: zero
976 *
977 * OR
978 *
979 * Input:
980 * buf: C string containing an unsigned
981 * integer value representing the new
982 * NFSv4 lease expiry time
983 * size: non-zero length of C string in @buf
984 * Output:
985 * On success: passed-in buffer filled with '\n'-terminated C
986 * string containing unsigned integer value of the
987 * current lease expiry time;
988 * return code is the size in bytes of the string
989 * On error: return code is zero or a negative errno value
990 */
991static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
992{
993 return nfsd4_write_time(file, buf, size, &nfsd4_lease);
994}
995
996/**
997 * write_gracetime - Set or report current NFSv4 grace period time
998 *
999 * As above, but sets the time of the NFSv4 grace period.
1000 *
1001 * Note this should never be set to less than the *previous*
1002 * lease-period time, but we don't try to enforce this. (In the common
1003 * case (a new boot), we don't know what the previous lease time was
1004 * anyway.)
1005 */
1006static ssize_t write_gracetime(struct file *file, char *buf, size_t size)
1007{
1008 return nfsd4_write_time(file, buf, size, &nfsd4_grace);
1009}
1010
1011extern char *nfs4_recoverydir(void);
1012
1013static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size)
1014{
1015 char *mesg = buf;
1016 char *recdir;
1017 int len, status;
1018
1019 if (size > 0) {
1020 if (nfsd_serv)
1021 return -EBUSY;
1022 if (size > PATH_MAX || buf[size-1] != '\n')
1023 return -EINVAL;
1024 buf[size-1] = 0;
1025
1026 recdir = mesg;
1027 len = qword_get(&mesg, recdir, size);
1028 if (len <= 0)
1029 return -EINVAL;
1030
1031 status = nfs4_reset_recoverydir(recdir);
1032 if (status)
1033 return status;
1034 }
1035
1036 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n",
1037 nfs4_recoverydir());
1038}
1039
1040/**
1041 * write_recoverydir - Set or report the pathname of the recovery directory
1042 *
1043 * Input:
1044 * buf: ignored
1045 * size: zero
1046 *
1047 * OR
1048 *
1049 * Input:
1050 * buf: C string containing the pathname
1051 * of the directory on a local file
1052 * system containing permanent NFSv4
1053 * recovery data
1054 * size: non-zero length of C string in @buf
1055 * Output:
1056 * On success: passed-in buffer filled with '\n'-terminated C string
1057 * containing the current recovery pathname setting;
1058 * return code is the size in bytes of the string
1059 * On error: return code is zero or a negative errno value
1060 */
1061static ssize_t write_recoverydir(struct file *file, char *buf, size_t size)
1062{
1063 ssize_t rv;
1064
1065 mutex_lock(&nfsd_mutex);
1066 rv = __write_recoverydir(file, buf, size);
1067 mutex_unlock(&nfsd_mutex);
1068 return rv;
1069}
1070
1071#endif
1072
1073/*----------------------------------------------------------------------------*/
1074/*
1075 * populating the filesystem.
1076 */
1077
1078static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
1079{
1080 static struct tree_descr nfsd_files[] = {
1081 [NFSD_List] = {"exports", &exports_operations, S_IRUGO},
1082 [NFSD_Export_features] = {"export_features",
1083 &export_features_operations, S_IRUGO},
1084 [NFSD_FO_UnlockIP] = {"unlock_ip",
1085 &transaction_ops, S_IWUSR|S_IRUSR},
1086 [NFSD_FO_UnlockFS] = {"unlock_filesystem",
1087 &transaction_ops, S_IWUSR|S_IRUSR},
1088 [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR},
1089 [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
1090 [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR},
1091 [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO},
1092 [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR},
1093 [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO},
1094 [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO},
1095#if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE)
1096 [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO},
1097#endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */
1098#ifdef CONFIG_NFSD_V4
1099 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR},
1100 [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR},
1101 [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR},
1102#endif
1103 /* last one */ {""}
1104 };
1105 return simple_fill_super(sb, 0x6e667364, nfsd_files);
1106}
1107
1108static struct dentry *nfsd_mount(struct file_system_type *fs_type,
1109 int flags, const char *dev_name, void *data)
1110{
1111 return mount_single(fs_type, flags, data, nfsd_fill_super);
1112}
1113
1114static struct file_system_type nfsd_fs_type = {
1115 .owner = THIS_MODULE,
1116 .name = "nfsd",
1117 .mount = nfsd_mount,
1118 .kill_sb = kill_litter_super,
1119};
1120
1121#ifdef CONFIG_PROC_FS
1122static int create_proc_exports_entry(void)
1123{
1124 struct proc_dir_entry *entry;
1125
1126 entry = proc_mkdir("fs/nfs", NULL);
1127 if (!entry)
1128 return -ENOMEM;
1129 entry = proc_create("exports", 0, entry, &exports_operations);
1130 if (!entry)
1131 return -ENOMEM;
1132 return 0;
1133}
1134#else /* CONFIG_PROC_FS */
1135static int create_proc_exports_entry(void)
1136{
1137 return 0;
1138}
1139#endif
1140
1141int nfsd_net_id;
1142
1143static __net_init int nfsd_init_net(struct net *net)
1144{
1145 int retval;
1146
1147 retval = nfsd_export_init(net);
1148 if (retval)
1149 goto out_export_error;
1150 retval = nfsd_idmap_init(net);
1151 if (retval)
1152 goto out_idmap_error;
1153 return 0;
1154
1155out_idmap_error:
1156 nfsd_export_shutdown(net);
1157out_export_error:
1158 return retval;
1159}
1160
1161static __net_exit void nfsd_exit_net(struct net *net)
1162{
1163 nfsd_idmap_shutdown(net);
1164 nfsd_export_shutdown(net);
1165}
1166
1167static struct pernet_operations nfsd_net_ops = {
1168 .init = nfsd_init_net,
1169 .exit = nfsd_exit_net,
1170 .id = &nfsd_net_id,
1171 .size = sizeof(struct nfsd_net),
1172};
1173
1174static int __init init_nfsd(void)
1175{
1176 int retval;
1177 printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
1178
1179 retval = register_cld_notifier();
1180 if (retval)
1181 return retval;
1182 retval = register_pernet_subsys(&nfsd_net_ops);
1183 if (retval < 0)
1184 goto out_unregister_notifier;
1185 retval = nfsd4_init_slabs();
1186 if (retval)
1187 goto out_unregister_pernet;
1188 nfs4_state_init();
1189 retval = nfsd_fault_inject_init(); /* nfsd fault injection controls */
1190 if (retval)
1191 goto out_free_slabs;
1192 nfsd_stat_init(); /* Statistics */
1193 retval = nfsd_reply_cache_init();
1194 if (retval)
1195 goto out_free_stat;
1196 nfsd_lockd_init(); /* lockd->nfsd callbacks */
1197 retval = create_proc_exports_entry();
1198 if (retval)
1199 goto out_free_lockd;
1200 retval = register_filesystem(&nfsd_fs_type);
1201 if (retval)
1202 goto out_free_all;
1203 return 0;
1204out_free_all:
1205 remove_proc_entry("fs/nfs/exports", NULL);
1206 remove_proc_entry("fs/nfs", NULL);
1207out_free_lockd:
1208 nfsd_lockd_shutdown();
1209 nfsd_reply_cache_shutdown();
1210out_free_stat:
1211 nfsd_stat_shutdown();
1212 nfsd_fault_inject_cleanup();
1213out_free_slabs:
1214 nfsd4_free_slabs();
1215out_unregister_pernet:
1216 unregister_pernet_subsys(&nfsd_net_ops);
1217out_unregister_notifier:
1218 unregister_cld_notifier();
1219 return retval;
1220}
1221
1222static void __exit exit_nfsd(void)
1223{
1224 nfsd_reply_cache_shutdown();
1225 remove_proc_entry("fs/nfs/exports", NULL);
1226 remove_proc_entry("fs/nfs", NULL);
1227 nfsd_stat_shutdown();
1228 nfsd_lockd_shutdown();
1229 nfsd4_free_slabs();
1230 nfsd_fault_inject_cleanup();
1231 unregister_filesystem(&nfsd_fs_type);
1232 unregister_pernet_subsys(&nfsd_net_ops);
1233 unregister_cld_notifier();
1234}
1235
1236MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1237MODULE_LICENSE("GPL");
1238module_init(init_nfsd)
1239module_exit(exit_nfsd)