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Commit | Line | Data |
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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 | #include "pnfs.h" | |
25 | ||
26 | /* | |
27 | * We have a single directory with several nodes in it. | |
28 | */ | |
29 | enum { | |
30 | NFSD_Root = 1, | |
31 | NFSD_List, | |
32 | NFSD_Export_features, | |
33 | NFSD_Fh, | |
34 | NFSD_FO_UnlockIP, | |
35 | NFSD_FO_UnlockFS, | |
36 | NFSD_Threads, | |
37 | NFSD_Pool_Threads, | |
38 | NFSD_Pool_Stats, | |
39 | NFSD_Reply_Cache_Stats, | |
40 | NFSD_Versions, | |
41 | NFSD_Ports, | |
42 | NFSD_MaxBlkSize, | |
43 | NFSD_MaxConnections, | |
44 | NFSD_SupportedEnctypes, | |
45 | /* | |
46 | * The below MUST come last. Otherwise we leave a hole in nfsd_files[] | |
47 | * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops | |
48 | */ | |
49 | #ifdef CONFIG_NFSD_V4 | |
50 | NFSD_Leasetime, | |
51 | NFSD_Gracetime, | |
52 | NFSD_RecoveryDir, | |
53 | NFSD_V4EndGrace, | |
54 | #endif | |
55 | }; | |
56 | ||
57 | /* | |
58 | * write() for these nodes. | |
59 | */ | |
60 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size); | |
61 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); | |
62 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); | |
63 | static ssize_t write_threads(struct file *file, char *buf, size_t size); | |
64 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); | |
65 | static ssize_t write_versions(struct file *file, char *buf, size_t size); | |
66 | static ssize_t write_ports(struct file *file, char *buf, size_t size); | |
67 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); | |
68 | static ssize_t write_maxconn(struct file *file, char *buf, size_t size); | |
69 | #ifdef CONFIG_NFSD_V4 | |
70 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size); | |
71 | static ssize_t write_gracetime(struct file *file, char *buf, size_t size); | |
72 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); | |
73 | static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size); | |
74 | #endif | |
75 | ||
76 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { | |
77 | [NFSD_Fh] = write_filehandle, | |
78 | [NFSD_FO_UnlockIP] = write_unlock_ip, | |
79 | [NFSD_FO_UnlockFS] = write_unlock_fs, | |
80 | [NFSD_Threads] = write_threads, | |
81 | [NFSD_Pool_Threads] = write_pool_threads, | |
82 | [NFSD_Versions] = write_versions, | |
83 | [NFSD_Ports] = write_ports, | |
84 | [NFSD_MaxBlkSize] = write_maxblksize, | |
85 | [NFSD_MaxConnections] = write_maxconn, | |
86 | #ifdef CONFIG_NFSD_V4 | |
87 | [NFSD_Leasetime] = write_leasetime, | |
88 | [NFSD_Gracetime] = write_gracetime, | |
89 | [NFSD_RecoveryDir] = write_recoverydir, | |
90 | [NFSD_V4EndGrace] = write_v4_end_grace, | |
91 | #endif | |
92 | }; | |
93 | ||
94 | static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
95 | { | |
96 | ino_t ino = file_inode(file)->i_ino; | |
97 | char *data; | |
98 | ssize_t rv; | |
99 | ||
100 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) | |
101 | return -EINVAL; | |
102 | ||
103 | data = simple_transaction_get(file, buf, size); | |
104 | if (IS_ERR(data)) | |
105 | return PTR_ERR(data); | |
106 | ||
107 | rv = write_op[ino](file, data, size); | |
108 | if (rv >= 0) { | |
109 | simple_transaction_set(file, rv); | |
110 | rv = size; | |
111 | } | |
112 | return rv; | |
113 | } | |
114 | ||
115 | static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) | |
116 | { | |
117 | if (! file->private_data) { | |
118 | /* An attempt to read a transaction file without writing | |
119 | * causes a 0-byte write so that the file can return | |
120 | * state information | |
121 | */ | |
122 | ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); | |
123 | if (rv < 0) | |
124 | return rv; | |
125 | } | |
126 | return simple_transaction_read(file, buf, size, pos); | |
127 | } | |
128 | ||
129 | static const struct file_operations transaction_ops = { | |
130 | .write = nfsctl_transaction_write, | |
131 | .read = nfsctl_transaction_read, | |
132 | .release = simple_transaction_release, | |
133 | .llseek = default_llseek, | |
134 | }; | |
135 | ||
136 | static int exports_net_open(struct net *net, struct file *file) | |
137 | { | |
138 | int err; | |
139 | struct seq_file *seq; | |
140 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
141 | ||
142 | err = seq_open(file, &nfs_exports_op); | |
143 | if (err) | |
144 | return err; | |
145 | ||
146 | seq = file->private_data; | |
147 | seq->private = nn->svc_export_cache; | |
148 | return 0; | |
149 | } | |
150 | ||
151 | static int exports_proc_open(struct inode *inode, struct file *file) | |
152 | { | |
153 | return exports_net_open(current->nsproxy->net_ns, file); | |
154 | } | |
155 | ||
156 | static const struct file_operations exports_proc_operations = { | |
157 | .open = exports_proc_open, | |
158 | .read = seq_read, | |
159 | .llseek = seq_lseek, | |
160 | .release = seq_release, | |
161 | }; | |
162 | ||
163 | static int exports_nfsd_open(struct inode *inode, struct file *file) | |
164 | { | |
165 | return exports_net_open(inode->i_sb->s_fs_info, file); | |
166 | } | |
167 | ||
168 | static const struct file_operations exports_nfsd_operations = { | |
169 | .open = exports_nfsd_open, | |
170 | .read = seq_read, | |
171 | .llseek = seq_lseek, | |
172 | .release = seq_release, | |
173 | }; | |
174 | ||
175 | static int export_features_show(struct seq_file *m, void *v) | |
176 | { | |
177 | seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); | |
178 | return 0; | |
179 | } | |
180 | ||
181 | static int export_features_open(struct inode *inode, struct file *file) | |
182 | { | |
183 | return single_open(file, export_features_show, NULL); | |
184 | } | |
185 | ||
186 | static const struct file_operations export_features_operations = { | |
187 | .open = export_features_open, | |
188 | .read = seq_read, | |
189 | .llseek = seq_lseek, | |
190 | .release = single_release, | |
191 | }; | |
192 | ||
193 | #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) | |
194 | static int supported_enctypes_show(struct seq_file *m, void *v) | |
195 | { | |
196 | seq_printf(m, KRB5_SUPPORTED_ENCTYPES); | |
197 | return 0; | |
198 | } | |
199 | ||
200 | static int supported_enctypes_open(struct inode *inode, struct file *file) | |
201 | { | |
202 | return single_open(file, supported_enctypes_show, NULL); | |
203 | } | |
204 | ||
205 | static const struct file_operations supported_enctypes_ops = { | |
206 | .open = supported_enctypes_open, | |
207 | .read = seq_read, | |
208 | .llseek = seq_lseek, | |
209 | .release = single_release, | |
210 | }; | |
211 | #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ | |
212 | ||
213 | static const struct file_operations pool_stats_operations = { | |
214 | .open = nfsd_pool_stats_open, | |
215 | .read = seq_read, | |
216 | .llseek = seq_lseek, | |
217 | .release = nfsd_pool_stats_release, | |
218 | }; | |
219 | ||
220 | static const struct file_operations reply_cache_stats_operations = { | |
221 | .open = nfsd_reply_cache_stats_open, | |
222 | .read = seq_read, | |
223 | .llseek = seq_lseek, | |
224 | .release = single_release, | |
225 | }; | |
226 | ||
227 | /*----------------------------------------------------------------------------*/ | |
228 | /* | |
229 | * payload - write methods | |
230 | */ | |
231 | ||
232 | static inline struct net *netns(struct file *file) | |
233 | { | |
234 | return file_inode(file)->i_sb->s_fs_info; | |
235 | } | |
236 | ||
237 | /** | |
238 | * write_unlock_ip - Release all locks used by a client | |
239 | * | |
240 | * Experimental. | |
241 | * | |
242 | * Input: | |
243 | * buf: '\n'-terminated C string containing a | |
244 | * presentation format IP address | |
245 | * size: length of C string in @buf | |
246 | * Output: | |
247 | * On success: returns zero if all specified locks were released; | |
248 | * returns one if one or more locks were not released | |
249 | * On error: return code is negative errno value | |
250 | */ | |
251 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) | |
252 | { | |
253 | struct sockaddr_storage address; | |
254 | struct sockaddr *sap = (struct sockaddr *)&address; | |
255 | size_t salen = sizeof(address); | |
256 | char *fo_path; | |
257 | struct net *net = netns(file); | |
258 | ||
259 | /* sanity check */ | |
260 | if (size == 0) | |
261 | return -EINVAL; | |
262 | ||
263 | if (buf[size-1] != '\n') | |
264 | return -EINVAL; | |
265 | ||
266 | fo_path = buf; | |
267 | if (qword_get(&buf, fo_path, size) < 0) | |
268 | return -EINVAL; | |
269 | ||
270 | if (rpc_pton(net, fo_path, size, sap, salen) == 0) | |
271 | return -EINVAL; | |
272 | ||
273 | return nlmsvc_unlock_all_by_ip(sap); | |
274 | } | |
275 | ||
276 | /** | |
277 | * write_unlock_fs - Release all locks on a local file system | |
278 | * | |
279 | * Experimental. | |
280 | * | |
281 | * Input: | |
282 | * buf: '\n'-terminated C string containing the | |
283 | * absolute pathname of a local file system | |
284 | * size: length of C string in @buf | |
285 | * Output: | |
286 | * On success: returns zero if all specified locks were released; | |
287 | * returns one if one or more locks were not released | |
288 | * On error: return code is negative errno value | |
289 | */ | |
290 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) | |
291 | { | |
292 | struct path path; | |
293 | char *fo_path; | |
294 | int error; | |
295 | ||
296 | /* sanity check */ | |
297 | if (size == 0) | |
298 | return -EINVAL; | |
299 | ||
300 | if (buf[size-1] != '\n') | |
301 | return -EINVAL; | |
302 | ||
303 | fo_path = buf; | |
304 | if (qword_get(&buf, fo_path, size) < 0) | |
305 | return -EINVAL; | |
306 | ||
307 | error = kern_path(fo_path, 0, &path); | |
308 | if (error) | |
309 | return error; | |
310 | ||
311 | /* | |
312 | * XXX: Needs better sanity checking. Otherwise we could end up | |
313 | * releasing locks on the wrong file system. | |
314 | * | |
315 | * For example: | |
316 | * 1. Does the path refer to a directory? | |
317 | * 2. Is that directory a mount point, or | |
318 | * 3. Is that directory the root of an exported file system? | |
319 | */ | |
320 | error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb); | |
321 | ||
322 | path_put(&path); | |
323 | return error; | |
324 | } | |
325 | ||
326 | /** | |
327 | * write_filehandle - Get a variable-length NFS file handle by path | |
328 | * | |
329 | * On input, the buffer contains a '\n'-terminated C string comprised of | |
330 | * three alphanumeric words separated by whitespace. The string may | |
331 | * contain escape sequences. | |
332 | * | |
333 | * Input: | |
334 | * buf: | |
335 | * domain: client domain name | |
336 | * path: export pathname | |
337 | * maxsize: numeric maximum size of | |
338 | * @buf | |
339 | * size: length of C string in @buf | |
340 | * Output: | |
341 | * On success: passed-in buffer filled with '\n'-terminated C | |
342 | * string containing a ASCII hex text version | |
343 | * of the NFS file handle; | |
344 | * return code is the size in bytes of the string | |
345 | * On error: return code is negative errno value | |
346 | */ | |
347 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size) | |
348 | { | |
349 | char *dname, *path; | |
350 | int uninitialized_var(maxsize); | |
351 | char *mesg = buf; | |
352 | int len; | |
353 | struct auth_domain *dom; | |
354 | struct knfsd_fh fh; | |
355 | ||
356 | if (size == 0) | |
357 | return -EINVAL; | |
358 | ||
359 | if (buf[size-1] != '\n') | |
360 | return -EINVAL; | |
361 | buf[size-1] = 0; | |
362 | ||
363 | dname = mesg; | |
364 | len = qword_get(&mesg, dname, size); | |
365 | if (len <= 0) | |
366 | return -EINVAL; | |
367 | ||
368 | path = dname+len+1; | |
369 | len = qword_get(&mesg, path, size); | |
370 | if (len <= 0) | |
371 | return -EINVAL; | |
372 | ||
373 | len = get_int(&mesg, &maxsize); | |
374 | if (len) | |
375 | return len; | |
376 | ||
377 | if (maxsize < NFS_FHSIZE) | |
378 | return -EINVAL; | |
379 | maxsize = min(maxsize, NFS3_FHSIZE); | |
380 | ||
381 | if (qword_get(&mesg, mesg, size)>0) | |
382 | return -EINVAL; | |
383 | ||
384 | /* we have all the words, they are in buf.. */ | |
385 | dom = unix_domain_find(dname); | |
386 | if (!dom) | |
387 | return -ENOMEM; | |
388 | ||
389 | len = exp_rootfh(netns(file), dom, path, &fh, maxsize); | |
390 | auth_domain_put(dom); | |
391 | if (len) | |
392 | return len; | |
393 | ||
394 | mesg = buf; | |
395 | len = SIMPLE_TRANSACTION_LIMIT; | |
396 | qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); | |
397 | mesg[-1] = '\n'; | |
398 | return mesg - buf; | |
399 | } | |
400 | ||
401 | /** | |
402 | * write_threads - Start NFSD, or report the current number of running threads | |
403 | * | |
404 | * Input: | |
405 | * buf: ignored | |
406 | * size: zero | |
407 | * Output: | |
408 | * On success: passed-in buffer filled with '\n'-terminated C | |
409 | * string numeric value representing the number of | |
410 | * running NFSD threads; | |
411 | * return code is the size in bytes of the string | |
412 | * On error: return code is zero | |
413 | * | |
414 | * OR | |
415 | * | |
416 | * Input: | |
417 | * buf: C string containing an unsigned | |
418 | * integer value representing the | |
419 | * number of NFSD threads to start | |
420 | * size: non-zero length of C string in @buf | |
421 | * Output: | |
422 | * On success: NFS service is started; | |
423 | * passed-in buffer filled with '\n'-terminated C | |
424 | * string numeric value representing the number of | |
425 | * running NFSD threads; | |
426 | * return code is the size in bytes of the string | |
427 | * On error: return code is zero or a negative errno value | |
428 | */ | |
429 | static ssize_t write_threads(struct file *file, char *buf, size_t size) | |
430 | { | |
431 | char *mesg = buf; | |
432 | int rv; | |
433 | struct net *net = netns(file); | |
434 | ||
435 | if (size > 0) { | |
436 | int newthreads; | |
437 | rv = get_int(&mesg, &newthreads); | |
438 | if (rv) | |
439 | return rv; | |
440 | if (newthreads < 0) | |
441 | return -EINVAL; | |
442 | rv = nfsd_svc(newthreads, net); | |
443 | if (rv < 0) | |
444 | return rv; | |
445 | } else | |
446 | rv = nfsd_nrthreads(net); | |
447 | ||
448 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); | |
449 | } | |
450 | ||
451 | /** | |
452 | * write_pool_threads - Set or report the current number of threads per pool | |
453 | * | |
454 | * Input: | |
455 | * buf: ignored | |
456 | * size: zero | |
457 | * | |
458 | * OR | |
459 | * | |
460 | * Input: | |
461 | * buf: C string containing whitespace- | |
462 | * separated unsigned integer values | |
463 | * representing the number of NFSD | |
464 | * threads to start in each pool | |
465 | * size: non-zero length of C string in @buf | |
466 | * Output: | |
467 | * On success: passed-in buffer filled with '\n'-terminated C | |
468 | * string containing integer values representing the | |
469 | * number of NFSD threads in each pool; | |
470 | * return code is the size in bytes of the string | |
471 | * On error: return code is zero or a negative errno value | |
472 | */ | |
473 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) | |
474 | { | |
475 | /* if size > 0, look for an array of number of threads per node | |
476 | * and apply them then write out number of threads per node as reply | |
477 | */ | |
478 | char *mesg = buf; | |
479 | int i; | |
480 | int rv; | |
481 | int len; | |
482 | int npools; | |
483 | int *nthreads; | |
484 | struct net *net = netns(file); | |
485 | ||
486 | mutex_lock(&nfsd_mutex); | |
487 | npools = nfsd_nrpools(net); | |
488 | if (npools == 0) { | |
489 | /* | |
490 | * NFS is shut down. The admin can start it by | |
491 | * writing to the threads file but NOT the pool_threads | |
492 | * file, sorry. Report zero threads. | |
493 | */ | |
494 | mutex_unlock(&nfsd_mutex); | |
495 | strcpy(buf, "0\n"); | |
496 | return strlen(buf); | |
497 | } | |
498 | ||
499 | nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); | |
500 | rv = -ENOMEM; | |
501 | if (nthreads == NULL) | |
502 | goto out_free; | |
503 | ||
504 | if (size > 0) { | |
505 | for (i = 0; i < npools; i++) { | |
506 | rv = get_int(&mesg, &nthreads[i]); | |
507 | if (rv == -ENOENT) | |
508 | break; /* fewer numbers than pools */ | |
509 | if (rv) | |
510 | goto out_free; /* syntax error */ | |
511 | rv = -EINVAL; | |
512 | if (nthreads[i] < 0) | |
513 | goto out_free; | |
514 | } | |
515 | rv = nfsd_set_nrthreads(i, nthreads, net); | |
516 | if (rv) | |
517 | goto out_free; | |
518 | } | |
519 | ||
520 | rv = nfsd_get_nrthreads(npools, nthreads, net); | |
521 | if (rv) | |
522 | goto out_free; | |
523 | ||
524 | mesg = buf; | |
525 | size = SIMPLE_TRANSACTION_LIMIT; | |
526 | for (i = 0; i < npools && size > 0; i++) { | |
527 | snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); | |
528 | len = strlen(mesg); | |
529 | size -= len; | |
530 | mesg += len; | |
531 | } | |
532 | rv = mesg - buf; | |
533 | out_free: | |
534 | kfree(nthreads); | |
535 | mutex_unlock(&nfsd_mutex); | |
536 | return rv; | |
537 | } | |
538 | ||
539 | static ssize_t | |
540 | nfsd_print_version_support(char *buf, int remaining, const char *sep, | |
541 | unsigned vers, int minor) | |
542 | { | |
543 | const char *format = minor < 0 ? "%s%c%u" : "%s%c%u.%u"; | |
544 | bool supported = !!nfsd_vers(vers, NFSD_TEST); | |
545 | ||
546 | if (vers == 4 && minor >= 0 && | |
547 | !nfsd_minorversion(minor, NFSD_TEST)) | |
548 | supported = false; | |
549 | if (minor == 0 && supported) | |
550 | /* | |
551 | * special case for backward compatability. | |
552 | * +4.0 is never reported, it is implied by | |
553 | * +4, unless -4.0 is present. | |
554 | */ | |
555 | return 0; | |
556 | return snprintf(buf, remaining, format, sep, | |
557 | supported ? '+' : '-', vers, minor); | |
558 | } | |
559 | ||
560 | static ssize_t __write_versions(struct file *file, char *buf, size_t size) | |
561 | { | |
562 | char *mesg = buf; | |
563 | char *vers, *minorp, sign; | |
564 | int len, num, remaining; | |
565 | ssize_t tlen = 0; | |
566 | char *sep; | |
567 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); | |
568 | ||
569 | if (size>0) { | |
570 | if (nn->nfsd_serv) | |
571 | /* Cannot change versions without updating | |
572 | * nn->nfsd_serv->sv_xdrsize, and reallocing | |
573 | * rq_argp and rq_resp | |
574 | */ | |
575 | return -EBUSY; | |
576 | if (buf[size-1] != '\n') | |
577 | return -EINVAL; | |
578 | buf[size-1] = 0; | |
579 | ||
580 | vers = mesg; | |
581 | len = qword_get(&mesg, vers, size); | |
582 | if (len <= 0) return -EINVAL; | |
583 | do { | |
584 | enum vers_op cmd; | |
585 | unsigned minor; | |
586 | sign = *vers; | |
587 | if (sign == '+' || sign == '-') | |
588 | num = simple_strtol((vers+1), &minorp, 0); | |
589 | else | |
590 | num = simple_strtol(vers, &minorp, 0); | |
591 | if (*minorp == '.') { | |
592 | if (num != 4) | |
593 | return -EINVAL; | |
594 | if (kstrtouint(minorp+1, 0, &minor) < 0) | |
595 | return -EINVAL; | |
596 | } | |
597 | ||
598 | cmd = sign == '-' ? NFSD_CLEAR : NFSD_SET; | |
599 | switch(num) { | |
600 | case 2: | |
601 | case 3: | |
602 | nfsd_vers(num, cmd); | |
603 | break; | |
604 | case 4: | |
605 | if (*minorp == '.') { | |
606 | if (nfsd_minorversion(minor, cmd) < 0) | |
607 | return -EINVAL; | |
608 | } else if ((cmd == NFSD_SET) != nfsd_vers(num, NFSD_TEST)) { | |
609 | /* | |
610 | * Either we have +4 and no minors are enabled, | |
611 | * or we have -4 and at least one minor is enabled. | |
612 | * In either case, propagate 'cmd' to all minors. | |
613 | */ | |
614 | minor = 0; | |
615 | while (nfsd_minorversion(minor, cmd) >= 0) | |
616 | minor++; | |
617 | } | |
618 | break; | |
619 | default: | |
620 | return -EINVAL; | |
621 | } | |
622 | vers += len + 1; | |
623 | } while ((len = qword_get(&mesg, vers, size)) > 0); | |
624 | /* If all get turned off, turn them back on, as | |
625 | * having no versions is BAD | |
626 | */ | |
627 | nfsd_reset_versions(); | |
628 | } | |
629 | ||
630 | /* Now write current state into reply buffer */ | |
631 | len = 0; | |
632 | sep = ""; | |
633 | remaining = SIMPLE_TRANSACTION_LIMIT; | |
634 | for (num=2 ; num <= 4 ; num++) { | |
635 | int minor; | |
636 | if (!nfsd_vers(num, NFSD_AVAIL)) | |
637 | continue; | |
638 | ||
639 | minor = -1; | |
640 | do { | |
641 | len = nfsd_print_version_support(buf, remaining, | |
642 | sep, num, minor); | |
643 | if (len >= remaining) | |
644 | goto out; | |
645 | remaining -= len; | |
646 | buf += len; | |
647 | tlen += len; | |
648 | minor++; | |
649 | if (len) | |
650 | sep = " "; | |
651 | } while (num == 4 && minor <= NFSD_SUPPORTED_MINOR_VERSION); | |
652 | } | |
653 | out: | |
654 | len = snprintf(buf, remaining, "\n"); | |
655 | if (len >= remaining) | |
656 | return -EINVAL; | |
657 | return tlen + len; | |
658 | } | |
659 | ||
660 | /** | |
661 | * write_versions - Set or report the available NFS protocol versions | |
662 | * | |
663 | * Input: | |
664 | * buf: ignored | |
665 | * size: zero | |
666 | * Output: | |
667 | * On success: passed-in buffer filled with '\n'-terminated C | |
668 | * string containing positive or negative integer | |
669 | * values representing the current status of each | |
670 | * protocol version; | |
671 | * return code is the size in bytes of the string | |
672 | * On error: return code is zero or a negative errno value | |
673 | * | |
674 | * OR | |
675 | * | |
676 | * Input: | |
677 | * buf: C string containing whitespace- | |
678 | * separated positive or negative | |
679 | * integer values representing NFS | |
680 | * protocol versions to enable ("+n") | |
681 | * or disable ("-n") | |
682 | * size: non-zero length of C string in @buf | |
683 | * Output: | |
684 | * On success: status of zero or more protocol versions has | |
685 | * been updated; passed-in buffer filled with | |
686 | * '\n'-terminated C string containing positive | |
687 | * or negative integer values representing the | |
688 | * current status of each protocol version; | |
689 | * return code is the size in bytes of the string | |
690 | * On error: return code is zero or a negative errno value | |
691 | */ | |
692 | static ssize_t write_versions(struct file *file, char *buf, size_t size) | |
693 | { | |
694 | ssize_t rv; | |
695 | ||
696 | mutex_lock(&nfsd_mutex); | |
697 | rv = __write_versions(file, buf, size); | |
698 | mutex_unlock(&nfsd_mutex); | |
699 | return rv; | |
700 | } | |
701 | ||
702 | /* | |
703 | * Zero-length write. Return a list of NFSD's current listener | |
704 | * transports. | |
705 | */ | |
706 | static ssize_t __write_ports_names(char *buf, struct net *net) | |
707 | { | |
708 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
709 | ||
710 | if (nn->nfsd_serv == NULL) | |
711 | return 0; | |
712 | return svc_xprt_names(nn->nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); | |
713 | } | |
714 | ||
715 | /* | |
716 | * A single 'fd' number was written, in which case it must be for | |
717 | * a socket of a supported family/protocol, and we use it as an | |
718 | * nfsd listener. | |
719 | */ | |
720 | static ssize_t __write_ports_addfd(char *buf, struct net *net) | |
721 | { | |
722 | char *mesg = buf; | |
723 | int fd, err; | |
724 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
725 | ||
726 | err = get_int(&mesg, &fd); | |
727 | if (err != 0 || fd < 0) | |
728 | return -EINVAL; | |
729 | ||
730 | if (svc_alien_sock(net, fd)) { | |
731 | printk(KERN_ERR "%s: socket net is different to NFSd's one\n", __func__); | |
732 | return -EINVAL; | |
733 | } | |
734 | ||
735 | err = nfsd_create_serv(net); | |
736 | if (err != 0) | |
737 | return err; | |
738 | ||
739 | err = svc_addsock(nn->nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT); | |
740 | if (err < 0) { | |
741 | nfsd_destroy(net); | |
742 | return err; | |
743 | } | |
744 | ||
745 | /* Decrease the count, but don't shut down the service */ | |
746 | nn->nfsd_serv->sv_nrthreads--; | |
747 | return err; | |
748 | } | |
749 | ||
750 | /* | |
751 | * A transport listener is added by writing it's transport name and | |
752 | * a port number. | |
753 | */ | |
754 | static ssize_t __write_ports_addxprt(char *buf, struct net *net) | |
755 | { | |
756 | char transport[16]; | |
757 | struct svc_xprt *xprt; | |
758 | int port, err; | |
759 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
760 | ||
761 | if (sscanf(buf, "%15s %5u", transport, &port) != 2) | |
762 | return -EINVAL; | |
763 | ||
764 | if (port < 1 || port > USHRT_MAX) | |
765 | return -EINVAL; | |
766 | ||
767 | err = nfsd_create_serv(net); | |
768 | if (err != 0) | |
769 | return err; | |
770 | ||
771 | err = svc_create_xprt(nn->nfsd_serv, transport, net, | |
772 | PF_INET, port, SVC_SOCK_ANONYMOUS); | |
773 | if (err < 0) | |
774 | goto out_err; | |
775 | ||
776 | err = svc_create_xprt(nn->nfsd_serv, transport, net, | |
777 | PF_INET6, port, SVC_SOCK_ANONYMOUS); | |
778 | if (err < 0 && err != -EAFNOSUPPORT) | |
779 | goto out_close; | |
780 | ||
781 | /* Decrease the count, but don't shut down the service */ | |
782 | nn->nfsd_serv->sv_nrthreads--; | |
783 | return 0; | |
784 | out_close: | |
785 | xprt = svc_find_xprt(nn->nfsd_serv, transport, net, PF_INET, port); | |
786 | if (xprt != NULL) { | |
787 | svc_close_xprt(xprt); | |
788 | svc_xprt_put(xprt); | |
789 | } | |
790 | out_err: | |
791 | nfsd_destroy(net); | |
792 | return err; | |
793 | } | |
794 | ||
795 | static ssize_t __write_ports(struct file *file, char *buf, size_t size, | |
796 | struct net *net) | |
797 | { | |
798 | if (size == 0) | |
799 | return __write_ports_names(buf, net); | |
800 | ||
801 | if (isdigit(buf[0])) | |
802 | return __write_ports_addfd(buf, net); | |
803 | ||
804 | if (isalpha(buf[0])) | |
805 | return __write_ports_addxprt(buf, net); | |
806 | ||
807 | return -EINVAL; | |
808 | } | |
809 | ||
810 | /** | |
811 | * write_ports - Pass a socket file descriptor or transport name to listen on | |
812 | * | |
813 | * Input: | |
814 | * buf: ignored | |
815 | * size: zero | |
816 | * Output: | |
817 | * On success: passed-in buffer filled with a '\n'-terminated C | |
818 | * string containing a whitespace-separated list of | |
819 | * named NFSD listeners; | |
820 | * return code is the size in bytes of the string | |
821 | * On error: return code is zero or a negative errno value | |
822 | * | |
823 | * OR | |
824 | * | |
825 | * Input: | |
826 | * buf: C string containing an unsigned | |
827 | * integer value representing a bound | |
828 | * but unconnected socket that is to be | |
829 | * used as an NFSD listener; listen(3) | |
830 | * must be called for a SOCK_STREAM | |
831 | * socket, otherwise it is ignored | |
832 | * size: non-zero length of C string in @buf | |
833 | * Output: | |
834 | * On success: NFS service is started; | |
835 | * passed-in buffer filled with a '\n'-terminated C | |
836 | * string containing a unique alphanumeric name of | |
837 | * the listener; | |
838 | * return code is the size in bytes of the string | |
839 | * On error: return code is a negative errno value | |
840 | * | |
841 | * OR | |
842 | * | |
843 | * Input: | |
844 | * buf: C string containing a transport | |
845 | * name and an unsigned integer value | |
846 | * representing the port to listen on, | |
847 | * separated by whitespace | |
848 | * size: non-zero length of C string in @buf | |
849 | * Output: | |
850 | * On success: returns zero; NFS service is started | |
851 | * On error: return code is a negative errno value | |
852 | */ | |
853 | static ssize_t write_ports(struct file *file, char *buf, size_t size) | |
854 | { | |
855 | ssize_t rv; | |
856 | ||
857 | mutex_lock(&nfsd_mutex); | |
858 | rv = __write_ports(file, buf, size, netns(file)); | |
859 | mutex_unlock(&nfsd_mutex); | |
860 | return rv; | |
861 | } | |
862 | ||
863 | ||
864 | int nfsd_max_blksize; | |
865 | ||
866 | /** | |
867 | * write_maxblksize - Set or report the current NFS blksize | |
868 | * | |
869 | * Input: | |
870 | * buf: ignored | |
871 | * size: zero | |
872 | * | |
873 | * OR | |
874 | * | |
875 | * Input: | |
876 | * buf: C string containing an unsigned | |
877 | * integer value representing the new | |
878 | * NFS blksize | |
879 | * size: non-zero length of C string in @buf | |
880 | * Output: | |
881 | * On success: passed-in buffer filled with '\n'-terminated C string | |
882 | * containing numeric value of the current NFS blksize | |
883 | * setting; | |
884 | * return code is the size in bytes of the string | |
885 | * On error: return code is zero or a negative errno value | |
886 | */ | |
887 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) | |
888 | { | |
889 | char *mesg = buf; | |
890 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); | |
891 | ||
892 | if (size > 0) { | |
893 | int bsize; | |
894 | int rv = get_int(&mesg, &bsize); | |
895 | if (rv) | |
896 | return rv; | |
897 | /* force bsize into allowed range and | |
898 | * required alignment. | |
899 | */ | |
900 | bsize = max_t(int, bsize, 1024); | |
901 | bsize = min_t(int, bsize, NFSSVC_MAXBLKSIZE); | |
902 | bsize &= ~(1024-1); | |
903 | mutex_lock(&nfsd_mutex); | |
904 | if (nn->nfsd_serv) { | |
905 | mutex_unlock(&nfsd_mutex); | |
906 | return -EBUSY; | |
907 | } | |
908 | nfsd_max_blksize = bsize; | |
909 | mutex_unlock(&nfsd_mutex); | |
910 | } | |
911 | ||
912 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", | |
913 | nfsd_max_blksize); | |
914 | } | |
915 | ||
916 | /** | |
917 | * write_maxconn - Set or report the current max number of connections | |
918 | * | |
919 | * Input: | |
920 | * buf: ignored | |
921 | * size: zero | |
922 | * OR | |
923 | * | |
924 | * Input: | |
925 | * buf: C string containing an unsigned | |
926 | * integer value representing the new | |
927 | * number of max connections | |
928 | * size: non-zero length of C string in @buf | |
929 | * Output: | |
930 | * On success: passed-in buffer filled with '\n'-terminated C string | |
931 | * containing numeric value of max_connections setting | |
932 | * for this net namespace; | |
933 | * return code is the size in bytes of the string | |
934 | * On error: return code is zero or a negative errno value | |
935 | */ | |
936 | static ssize_t write_maxconn(struct file *file, char *buf, size_t size) | |
937 | { | |
938 | char *mesg = buf; | |
939 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); | |
940 | unsigned int maxconn = nn->max_connections; | |
941 | ||
942 | if (size > 0) { | |
943 | int rv = get_uint(&mesg, &maxconn); | |
944 | ||
945 | if (rv) | |
946 | return rv; | |
947 | nn->max_connections = maxconn; | |
948 | } | |
949 | ||
950 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%u\n", maxconn); | |
951 | } | |
952 | ||
953 | #ifdef CONFIG_NFSD_V4 | |
954 | static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, | |
955 | time_t *time, struct nfsd_net *nn) | |
956 | { | |
957 | char *mesg = buf; | |
958 | int rv, i; | |
959 | ||
960 | if (size > 0) { | |
961 | if (nn->nfsd_serv) | |
962 | return -EBUSY; | |
963 | rv = get_int(&mesg, &i); | |
964 | if (rv) | |
965 | return rv; | |
966 | /* | |
967 | * Some sanity checking. We don't have a reason for | |
968 | * these particular numbers, but problems with the | |
969 | * extremes are: | |
970 | * - Too short: the briefest network outage may | |
971 | * cause clients to lose all their locks. Also, | |
972 | * the frequent polling may be wasteful. | |
973 | * - Too long: do you really want reboot recovery | |
974 | * to take more than an hour? Or to make other | |
975 | * clients wait an hour before being able to | |
976 | * revoke a dead client's locks? | |
977 | */ | |
978 | if (i < 10 || i > 3600) | |
979 | return -EINVAL; | |
980 | *time = i; | |
981 | } | |
982 | ||
983 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time); | |
984 | } | |
985 | ||
986 | static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, | |
987 | time_t *time, struct nfsd_net *nn) | |
988 | { | |
989 | ssize_t rv; | |
990 | ||
991 | mutex_lock(&nfsd_mutex); | |
992 | rv = __nfsd4_write_time(file, buf, size, time, nn); | |
993 | mutex_unlock(&nfsd_mutex); | |
994 | return rv; | |
995 | } | |
996 | ||
997 | /** | |
998 | * write_leasetime - Set or report the current NFSv4 lease time | |
999 | * | |
1000 | * Input: | |
1001 | * buf: ignored | |
1002 | * size: zero | |
1003 | * | |
1004 | * OR | |
1005 | * | |
1006 | * Input: | |
1007 | * buf: C string containing an unsigned | |
1008 | * integer value representing the new | |
1009 | * NFSv4 lease expiry time | |
1010 | * size: non-zero length of C string in @buf | |
1011 | * Output: | |
1012 | * On success: passed-in buffer filled with '\n'-terminated C | |
1013 | * string containing unsigned integer value of the | |
1014 | * current lease expiry time; | |
1015 | * return code is the size in bytes of the string | |
1016 | * On error: return code is zero or a negative errno value | |
1017 | */ | |
1018 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size) | |
1019 | { | |
1020 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); | |
1021 | return nfsd4_write_time(file, buf, size, &nn->nfsd4_lease, nn); | |
1022 | } | |
1023 | ||
1024 | /** | |
1025 | * write_gracetime - Set or report current NFSv4 grace period time | |
1026 | * | |
1027 | * As above, but sets the time of the NFSv4 grace period. | |
1028 | * | |
1029 | * Note this should never be set to less than the *previous* | |
1030 | * lease-period time, but we don't try to enforce this. (In the common | |
1031 | * case (a new boot), we don't know what the previous lease time was | |
1032 | * anyway.) | |
1033 | */ | |
1034 | static ssize_t write_gracetime(struct file *file, char *buf, size_t size) | |
1035 | { | |
1036 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); | |
1037 | return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn); | |
1038 | } | |
1039 | ||
1040 | static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size, | |
1041 | struct nfsd_net *nn) | |
1042 | { | |
1043 | char *mesg = buf; | |
1044 | char *recdir; | |
1045 | int len, status; | |
1046 | ||
1047 | if (size > 0) { | |
1048 | if (nn->nfsd_serv) | |
1049 | return -EBUSY; | |
1050 | if (size > PATH_MAX || buf[size-1] != '\n') | |
1051 | return -EINVAL; | |
1052 | buf[size-1] = 0; | |
1053 | ||
1054 | recdir = mesg; | |
1055 | len = qword_get(&mesg, recdir, size); | |
1056 | if (len <= 0) | |
1057 | return -EINVAL; | |
1058 | ||
1059 | status = nfs4_reset_recoverydir(recdir); | |
1060 | if (status) | |
1061 | return status; | |
1062 | } | |
1063 | ||
1064 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", | |
1065 | nfs4_recoverydir()); | |
1066 | } | |
1067 | ||
1068 | /** | |
1069 | * write_recoverydir - Set or report the pathname of the recovery directory | |
1070 | * | |
1071 | * Input: | |
1072 | * buf: ignored | |
1073 | * size: zero | |
1074 | * | |
1075 | * OR | |
1076 | * | |
1077 | * Input: | |
1078 | * buf: C string containing the pathname | |
1079 | * of the directory on a local file | |
1080 | * system containing permanent NFSv4 | |
1081 | * recovery data | |
1082 | * size: non-zero length of C string in @buf | |
1083 | * Output: | |
1084 | * On success: passed-in buffer filled with '\n'-terminated C string | |
1085 | * containing the current recovery pathname setting; | |
1086 | * return code is the size in bytes of the string | |
1087 | * On error: return code is zero or a negative errno value | |
1088 | */ | |
1089 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) | |
1090 | { | |
1091 | ssize_t rv; | |
1092 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); | |
1093 | ||
1094 | mutex_lock(&nfsd_mutex); | |
1095 | rv = __write_recoverydir(file, buf, size, nn); | |
1096 | mutex_unlock(&nfsd_mutex); | |
1097 | return rv; | |
1098 | } | |
1099 | ||
1100 | /** | |
1101 | * write_v4_end_grace - release grace period for nfsd's v4.x lock manager | |
1102 | * | |
1103 | * Input: | |
1104 | * buf: ignored | |
1105 | * size: zero | |
1106 | * OR | |
1107 | * | |
1108 | * Input: | |
1109 | * buf: any value | |
1110 | * size: non-zero length of C string in @buf | |
1111 | * Output: | |
1112 | * passed-in buffer filled with "Y" or "N" with a newline | |
1113 | * and NULL-terminated C string. This indicates whether | |
1114 | * the grace period has ended in the current net | |
1115 | * namespace. Return code is the size in bytes of the | |
1116 | * string. Writing a string that starts with 'Y', 'y', or | |
1117 | * '1' to the file will end the grace period for nfsd's v4 | |
1118 | * lock manager. | |
1119 | */ | |
1120 | static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size) | |
1121 | { | |
1122 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); | |
1123 | ||
1124 | if (size > 0) { | |
1125 | switch(buf[0]) { | |
1126 | case 'Y': | |
1127 | case 'y': | |
1128 | case '1': | |
1129 | if (!nn->nfsd_serv) | |
1130 | return -EBUSY; | |
1131 | nfsd4_end_grace(nn); | |
1132 | break; | |
1133 | default: | |
1134 | return -EINVAL; | |
1135 | } | |
1136 | } | |
1137 | ||
1138 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%c\n", | |
1139 | nn->grace_ended ? 'Y' : 'N'); | |
1140 | } | |
1141 | ||
1142 | #endif | |
1143 | ||
1144 | /*----------------------------------------------------------------------------*/ | |
1145 | /* | |
1146 | * populating the filesystem. | |
1147 | */ | |
1148 | ||
1149 | static int nfsd_fill_super(struct super_block * sb, void * data, int silent) | |
1150 | { | |
1151 | static const struct tree_descr nfsd_files[] = { | |
1152 | [NFSD_List] = {"exports", &exports_nfsd_operations, S_IRUGO}, | |
1153 | [NFSD_Export_features] = {"export_features", | |
1154 | &export_features_operations, S_IRUGO}, | |
1155 | [NFSD_FO_UnlockIP] = {"unlock_ip", | |
1156 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
1157 | [NFSD_FO_UnlockFS] = {"unlock_filesystem", | |
1158 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
1159 | [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1160 | [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1161 | [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1162 | [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, | |
1163 | [NFSD_Reply_Cache_Stats] = {"reply_cache_stats", &reply_cache_stats_operations, S_IRUGO}, | |
1164 | [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1165 | [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, | |
1166 | [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, | |
1167 | [NFSD_MaxConnections] = {"max_connections", &transaction_ops, S_IWUSR|S_IRUGO}, | |
1168 | #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) | |
1169 | [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO}, | |
1170 | #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ | |
1171 | #ifdef CONFIG_NFSD_V4 | |
1172 | [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1173 | [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1174 | [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1175 | [NFSD_V4EndGrace] = {"v4_end_grace", &transaction_ops, S_IWUSR|S_IRUGO}, | |
1176 | #endif | |
1177 | /* last one */ {""} | |
1178 | }; | |
1179 | get_net(sb->s_fs_info); | |
1180 | return simple_fill_super(sb, 0x6e667364, nfsd_files); | |
1181 | } | |
1182 | ||
1183 | static struct dentry *nfsd_mount(struct file_system_type *fs_type, | |
1184 | int flags, const char *dev_name, void *data) | |
1185 | { | |
1186 | struct net *net = current->nsproxy->net_ns; | |
1187 | return mount_ns(fs_type, flags, data, net, net->user_ns, nfsd_fill_super); | |
1188 | } | |
1189 | ||
1190 | static void nfsd_umount(struct super_block *sb) | |
1191 | { | |
1192 | struct net *net = sb->s_fs_info; | |
1193 | ||
1194 | kill_litter_super(sb); | |
1195 | put_net(net); | |
1196 | } | |
1197 | ||
1198 | static struct file_system_type nfsd_fs_type = { | |
1199 | .owner = THIS_MODULE, | |
1200 | .name = "nfsd", | |
1201 | .mount = nfsd_mount, | |
1202 | .kill_sb = nfsd_umount, | |
1203 | }; | |
1204 | MODULE_ALIAS_FS("nfsd"); | |
1205 | ||
1206 | #ifdef CONFIG_PROC_FS | |
1207 | static int create_proc_exports_entry(void) | |
1208 | { | |
1209 | struct proc_dir_entry *entry; | |
1210 | ||
1211 | entry = proc_mkdir("fs/nfs", NULL); | |
1212 | if (!entry) | |
1213 | return -ENOMEM; | |
1214 | entry = proc_create("exports", 0, entry, | |
1215 | &exports_proc_operations); | |
1216 | if (!entry) { | |
1217 | remove_proc_entry("fs/nfs", NULL); | |
1218 | return -ENOMEM; | |
1219 | } | |
1220 | return 0; | |
1221 | } | |
1222 | #else /* CONFIG_PROC_FS */ | |
1223 | static int create_proc_exports_entry(void) | |
1224 | { | |
1225 | return 0; | |
1226 | } | |
1227 | #endif | |
1228 | ||
1229 | unsigned int nfsd_net_id; | |
1230 | ||
1231 | static __net_init int nfsd_init_net(struct net *net) | |
1232 | { | |
1233 | int retval; | |
1234 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1235 | ||
1236 | retval = nfsd_export_init(net); | |
1237 | if (retval) | |
1238 | goto out_export_error; | |
1239 | retval = nfsd_idmap_init(net); | |
1240 | if (retval) | |
1241 | goto out_idmap_error; | |
1242 | nn->nfsd4_lease = 90; /* default lease time */ | |
1243 | nn->nfsd4_grace = 90; | |
1244 | nn->clverifier_counter = prandom_u32(); | |
1245 | nn->clientid_counter = prandom_u32(); | |
1246 | ||
1247 | atomic_set(&nn->ntf_refcnt, 0); | |
1248 | init_waitqueue_head(&nn->ntf_wq); | |
1249 | return 0; | |
1250 | ||
1251 | out_idmap_error: | |
1252 | nfsd_export_shutdown(net); | |
1253 | out_export_error: | |
1254 | return retval; | |
1255 | } | |
1256 | ||
1257 | static __net_exit void nfsd_exit_net(struct net *net) | |
1258 | { | |
1259 | nfsd_idmap_shutdown(net); | |
1260 | nfsd_export_shutdown(net); | |
1261 | } | |
1262 | ||
1263 | static struct pernet_operations nfsd_net_ops = { | |
1264 | .init = nfsd_init_net, | |
1265 | .exit = nfsd_exit_net, | |
1266 | .id = &nfsd_net_id, | |
1267 | .size = sizeof(struct nfsd_net), | |
1268 | }; | |
1269 | ||
1270 | static int __init init_nfsd(void) | |
1271 | { | |
1272 | int retval; | |
1273 | printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); | |
1274 | ||
1275 | retval = register_pernet_subsys(&nfsd_net_ops); | |
1276 | if (retval < 0) | |
1277 | return retval; | |
1278 | retval = register_cld_notifier(); | |
1279 | if (retval) | |
1280 | goto out_unregister_pernet; | |
1281 | retval = nfsd4_init_slabs(); | |
1282 | if (retval) | |
1283 | goto out_unregister_notifier; | |
1284 | retval = nfsd4_init_pnfs(); | |
1285 | if (retval) | |
1286 | goto out_free_slabs; | |
1287 | retval = nfsd_fault_inject_init(); /* nfsd fault injection controls */ | |
1288 | if (retval) | |
1289 | goto out_exit_pnfs; | |
1290 | nfsd_stat_init(); /* Statistics */ | |
1291 | retval = nfsd_reply_cache_init(); | |
1292 | if (retval) | |
1293 | goto out_free_stat; | |
1294 | nfsd_lockd_init(); /* lockd->nfsd callbacks */ | |
1295 | retval = create_proc_exports_entry(); | |
1296 | if (retval) | |
1297 | goto out_free_lockd; | |
1298 | retval = register_filesystem(&nfsd_fs_type); | |
1299 | if (retval) | |
1300 | goto out_free_all; | |
1301 | return 0; | |
1302 | out_free_all: | |
1303 | remove_proc_entry("fs/nfs/exports", NULL); | |
1304 | remove_proc_entry("fs/nfs", NULL); | |
1305 | out_free_lockd: | |
1306 | nfsd_lockd_shutdown(); | |
1307 | nfsd_reply_cache_shutdown(); | |
1308 | out_free_stat: | |
1309 | nfsd_stat_shutdown(); | |
1310 | nfsd_fault_inject_cleanup(); | |
1311 | out_exit_pnfs: | |
1312 | nfsd4_exit_pnfs(); | |
1313 | out_free_slabs: | |
1314 | nfsd4_free_slabs(); | |
1315 | out_unregister_notifier: | |
1316 | unregister_cld_notifier(); | |
1317 | out_unregister_pernet: | |
1318 | unregister_pernet_subsys(&nfsd_net_ops); | |
1319 | return retval; | |
1320 | } | |
1321 | ||
1322 | static void __exit exit_nfsd(void) | |
1323 | { | |
1324 | nfsd_reply_cache_shutdown(); | |
1325 | remove_proc_entry("fs/nfs/exports", NULL); | |
1326 | remove_proc_entry("fs/nfs", NULL); | |
1327 | nfsd_stat_shutdown(); | |
1328 | nfsd_lockd_shutdown(); | |
1329 | nfsd4_free_slabs(); | |
1330 | nfsd4_exit_pnfs(); | |
1331 | nfsd_fault_inject_cleanup(); | |
1332 | unregister_filesystem(&nfsd_fs_type); | |
1333 | unregister_cld_notifier(); | |
1334 | unregister_pernet_subsys(&nfsd_net_ops); | |
1335 | } | |
1336 | ||
1337 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1338 | MODULE_LICENSE("GPL"); | |
1339 | module_init(init_nfsd) | |
1340 | module_exit(exit_nfsd) |