Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/nfsd/nfsctl.c | |
3 | * | |
4 | * Syscall interface to knfsd. | |
5 | * | |
6 | * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> | |
7 | */ | |
8 | ||
1da177e4 LT |
9 | #include <linux/module.h> |
10 | ||
11 | #include <linux/linkage.h> | |
12 | #include <linux/time.h> | |
13 | #include <linux/errno.h> | |
14 | #include <linux/fs.h> | |
15 | #include <linux/fcntl.h> | |
16 | #include <linux/net.h> | |
17 | #include <linux/in.h> | |
18 | #include <linux/syscalls.h> | |
19 | #include <linux/unistd.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/proc_fs.h> | |
22 | #include <linux/seq_file.h> | |
23 | #include <linux/pagemap.h> | |
24 | #include <linux/init.h> | |
70c3b76c | 25 | #include <linux/string.h> |
80212d59 | 26 | #include <linux/smp_lock.h> |
b41b66d6 | 27 | #include <linux/ctype.h> |
1da177e4 LT |
28 | |
29 | #include <linux/nfs.h> | |
30 | #include <linux/nfsd_idmap.h> | |
b41b66d6 | 31 | #include <linux/lockd/bind.h> |
1da177e4 | 32 | #include <linux/sunrpc/svc.h> |
80212d59 | 33 | #include <linux/sunrpc/svcsock.h> |
1da177e4 LT |
34 | #include <linux/nfsd/nfsd.h> |
35 | #include <linux/nfsd/cache.h> | |
36 | #include <linux/nfsd/xdr.h> | |
37 | #include <linux/nfsd/syscall.h> | |
38 | #include <linux/nfsd/interface.h> | |
39 | ||
40 | #include <asm/uaccess.h> | |
41 | ||
42 | /* | |
43 | * We have a single directory with 9 nodes in it. | |
44 | */ | |
45 | enum { | |
46 | NFSD_Root = 1, | |
47 | NFSD_Svc, | |
48 | NFSD_Add, | |
49 | NFSD_Del, | |
50 | NFSD_Export, | |
51 | NFSD_Unexport, | |
52 | NFSD_Getfd, | |
53 | NFSD_Getfs, | |
54 | NFSD_List, | |
55 | NFSD_Fh, | |
56 | NFSD_Threads, | |
eed2965a | 57 | NFSD_Pool_Threads, |
70c3b76c | 58 | NFSD_Versions, |
80212d59 | 59 | NFSD_Ports, |
596bbe53 | 60 | NFSD_MaxBlkSize, |
70c3b76c N |
61 | /* |
62 | * The below MUST come last. Otherwise we leave a hole in nfsd_files[] | |
63 | * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops | |
64 | */ | |
65 | #ifdef CONFIG_NFSD_V4 | |
1da177e4 | 66 | NFSD_Leasetime, |
0964a3d3 | 67 | NFSD_RecoveryDir, |
70c3b76c | 68 | #endif |
1da177e4 LT |
69 | }; |
70 | ||
71 | /* | |
72 | * write() for these nodes. | |
73 | */ | |
74 | static ssize_t write_svc(struct file *file, char *buf, size_t size); | |
75 | static ssize_t write_add(struct file *file, char *buf, size_t size); | |
76 | static ssize_t write_del(struct file *file, char *buf, size_t size); | |
77 | static ssize_t write_export(struct file *file, char *buf, size_t size); | |
78 | static ssize_t write_unexport(struct file *file, char *buf, size_t size); | |
79 | static ssize_t write_getfd(struct file *file, char *buf, size_t size); | |
80 | static ssize_t write_getfs(struct file *file, char *buf, size_t size); | |
81 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size); | |
82 | static ssize_t write_threads(struct file *file, char *buf, size_t size); | |
eed2965a | 83 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); |
70c3b76c | 84 | static ssize_t write_versions(struct file *file, char *buf, size_t size); |
80212d59 | 85 | static ssize_t write_ports(struct file *file, char *buf, size_t size); |
596bbe53 | 86 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); |
70c3b76c | 87 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 88 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size); |
0964a3d3 | 89 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); |
70c3b76c | 90 | #endif |
1da177e4 LT |
91 | |
92 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { | |
93 | [NFSD_Svc] = write_svc, | |
94 | [NFSD_Add] = write_add, | |
95 | [NFSD_Del] = write_del, | |
96 | [NFSD_Export] = write_export, | |
97 | [NFSD_Unexport] = write_unexport, | |
98 | [NFSD_Getfd] = write_getfd, | |
99 | [NFSD_Getfs] = write_getfs, | |
100 | [NFSD_Fh] = write_filehandle, | |
101 | [NFSD_Threads] = write_threads, | |
eed2965a | 102 | [NFSD_Pool_Threads] = write_pool_threads, |
70c3b76c | 103 | [NFSD_Versions] = write_versions, |
80212d59 | 104 | [NFSD_Ports] = write_ports, |
596bbe53 | 105 | [NFSD_MaxBlkSize] = write_maxblksize, |
70c3b76c | 106 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 107 | [NFSD_Leasetime] = write_leasetime, |
0964a3d3 | 108 | [NFSD_RecoveryDir] = write_recoverydir, |
70c3b76c | 109 | #endif |
1da177e4 LT |
110 | }; |
111 | ||
112 | static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
113 | { | |
114 | ino_t ino = file->f_dentry->d_inode->i_ino; | |
115 | char *data; | |
116 | ssize_t rv; | |
117 | ||
e8c96f8c | 118 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
1da177e4 LT |
119 | return -EINVAL; |
120 | ||
121 | data = simple_transaction_get(file, buf, size); | |
122 | if (IS_ERR(data)) | |
123 | return PTR_ERR(data); | |
124 | ||
125 | rv = write_op[ino](file, data, size); | |
126 | if (rv>0) { | |
127 | simple_transaction_set(file, rv); | |
128 | rv = size; | |
129 | } | |
130 | return rv; | |
131 | } | |
132 | ||
7390022d N |
133 | static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) |
134 | { | |
135 | if (! file->private_data) { | |
136 | /* An attempt to read a transaction file without writing | |
137 | * causes a 0-byte write so that the file can return | |
138 | * state information | |
139 | */ | |
140 | ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); | |
141 | if (rv < 0) | |
142 | return rv; | |
143 | } | |
144 | return simple_transaction_read(file, buf, size, pos); | |
145 | } | |
146 | ||
4b6f5d20 | 147 | static const struct file_operations transaction_ops = { |
1da177e4 | 148 | .write = nfsctl_transaction_write, |
7390022d | 149 | .read = nfsctl_transaction_read, |
1da177e4 LT |
150 | .release = simple_transaction_release, |
151 | }; | |
152 | ||
153 | extern struct seq_operations nfs_exports_op; | |
154 | static int exports_open(struct inode *inode, struct file *file) | |
155 | { | |
156 | return seq_open(file, &nfs_exports_op); | |
157 | } | |
158 | ||
4b6f5d20 | 159 | static const struct file_operations exports_operations = { |
1da177e4 LT |
160 | .open = exports_open, |
161 | .read = seq_read, | |
162 | .llseek = seq_lseek, | |
163 | .release = seq_release, | |
164 | }; | |
165 | ||
166 | /*----------------------------------------------------------------------------*/ | |
167 | /* | |
168 | * payload - write methods | |
169 | * If the method has a response, the response should be put in buf, | |
170 | * and the length returned. Otherwise return 0 or and -error. | |
171 | */ | |
172 | ||
173 | static ssize_t write_svc(struct file *file, char *buf, size_t size) | |
174 | { | |
175 | struct nfsctl_svc *data; | |
176 | if (size < sizeof(*data)) | |
177 | return -EINVAL; | |
178 | data = (struct nfsctl_svc*) buf; | |
179 | return nfsd_svc(data->svc_port, data->svc_nthreads); | |
180 | } | |
181 | ||
182 | static ssize_t write_add(struct file *file, char *buf, size_t size) | |
183 | { | |
184 | struct nfsctl_client *data; | |
185 | if (size < sizeof(*data)) | |
186 | return -EINVAL; | |
187 | data = (struct nfsctl_client *)buf; | |
188 | return exp_addclient(data); | |
189 | } | |
190 | ||
191 | static ssize_t write_del(struct file *file, char *buf, size_t size) | |
192 | { | |
193 | struct nfsctl_client *data; | |
194 | if (size < sizeof(*data)) | |
195 | return -EINVAL; | |
196 | data = (struct nfsctl_client *)buf; | |
197 | return exp_delclient(data); | |
198 | } | |
199 | ||
200 | static ssize_t write_export(struct file *file, char *buf, size_t size) | |
201 | { | |
202 | struct nfsctl_export *data; | |
203 | if (size < sizeof(*data)) | |
204 | return -EINVAL; | |
205 | data = (struct nfsctl_export*)buf; | |
206 | return exp_export(data); | |
207 | } | |
208 | ||
209 | static ssize_t write_unexport(struct file *file, char *buf, size_t size) | |
210 | { | |
211 | struct nfsctl_export *data; | |
212 | ||
213 | if (size < sizeof(*data)) | |
214 | return -EINVAL; | |
215 | data = (struct nfsctl_export*)buf; | |
216 | return exp_unexport(data); | |
217 | } | |
218 | ||
219 | static ssize_t write_getfs(struct file *file, char *buf, size_t size) | |
220 | { | |
221 | struct nfsctl_fsparm *data; | |
222 | struct sockaddr_in *sin; | |
223 | struct auth_domain *clp; | |
224 | int err = 0; | |
225 | struct knfsd_fh *res; | |
226 | ||
227 | if (size < sizeof(*data)) | |
228 | return -EINVAL; | |
229 | data = (struct nfsctl_fsparm*)buf; | |
230 | err = -EPROTONOSUPPORT; | |
231 | if (data->gd_addr.sa_family != AF_INET) | |
232 | goto out; | |
233 | sin = (struct sockaddr_in *)&data->gd_addr; | |
234 | if (data->gd_maxlen > NFS3_FHSIZE) | |
235 | data->gd_maxlen = NFS3_FHSIZE; | |
236 | ||
237 | res = (struct knfsd_fh*)buf; | |
238 | ||
239 | exp_readlock(); | |
240 | if (!(clp = auth_unix_lookup(sin->sin_addr))) | |
241 | err = -EPERM; | |
242 | else { | |
243 | err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen); | |
244 | auth_domain_put(clp); | |
245 | } | |
246 | exp_readunlock(); | |
247 | if (err == 0) | |
248 | err = res->fh_size + (int)&((struct knfsd_fh*)0)->fh_base; | |
249 | out: | |
250 | return err; | |
251 | } | |
252 | ||
253 | static ssize_t write_getfd(struct file *file, char *buf, size_t size) | |
254 | { | |
255 | struct nfsctl_fdparm *data; | |
256 | struct sockaddr_in *sin; | |
257 | struct auth_domain *clp; | |
258 | int err = 0; | |
259 | struct knfsd_fh fh; | |
260 | char *res; | |
261 | ||
262 | if (size < sizeof(*data)) | |
263 | return -EINVAL; | |
264 | data = (struct nfsctl_fdparm*)buf; | |
265 | err = -EPROTONOSUPPORT; | |
266 | if (data->gd_addr.sa_family != AF_INET) | |
267 | goto out; | |
268 | err = -EINVAL; | |
269 | if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS) | |
270 | goto out; | |
271 | ||
272 | res = buf; | |
273 | sin = (struct sockaddr_in *)&data->gd_addr; | |
274 | exp_readlock(); | |
275 | if (!(clp = auth_unix_lookup(sin->sin_addr))) | |
276 | err = -EPERM; | |
277 | else { | |
278 | err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE); | |
279 | auth_domain_put(clp); | |
280 | } | |
281 | exp_readunlock(); | |
282 | ||
283 | if (err == 0) { | |
284 | memset(res,0, NFS_FHSIZE); | |
285 | memcpy(res, &fh.fh_base, fh.fh_size); | |
286 | err = NFS_FHSIZE; | |
287 | } | |
288 | out: | |
289 | return err; | |
290 | } | |
291 | ||
292 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size) | |
293 | { | |
294 | /* request is: | |
295 | * domain path maxsize | |
296 | * response is | |
297 | * filehandle | |
298 | * | |
299 | * qword quoting is used, so filehandle will be \x.... | |
300 | */ | |
301 | char *dname, *path; | |
302 | int maxsize; | |
303 | char *mesg = buf; | |
304 | int len; | |
305 | struct auth_domain *dom; | |
306 | struct knfsd_fh fh; | |
307 | ||
308 | if (buf[size-1] != '\n') | |
309 | return -EINVAL; | |
310 | buf[size-1] = 0; | |
311 | ||
312 | dname = mesg; | |
313 | len = qword_get(&mesg, dname, size); | |
314 | if (len <= 0) return -EINVAL; | |
315 | ||
316 | path = dname+len+1; | |
317 | len = qword_get(&mesg, path, size); | |
318 | if (len <= 0) return -EINVAL; | |
319 | ||
320 | len = get_int(&mesg, &maxsize); | |
321 | if (len) | |
322 | return len; | |
323 | ||
324 | if (maxsize < NFS_FHSIZE) | |
325 | return -EINVAL; | |
326 | if (maxsize > NFS3_FHSIZE) | |
327 | maxsize = NFS3_FHSIZE; | |
328 | ||
329 | if (qword_get(&mesg, mesg, size)>0) | |
330 | return -EINVAL; | |
331 | ||
332 | /* we have all the words, they are in buf.. */ | |
333 | dom = unix_domain_find(dname); | |
334 | if (!dom) | |
335 | return -ENOMEM; | |
336 | ||
337 | len = exp_rootfh(dom, path, &fh, maxsize); | |
338 | auth_domain_put(dom); | |
339 | if (len) | |
340 | return len; | |
341 | ||
342 | mesg = buf; len = SIMPLE_TRANSACTION_LIMIT; | |
343 | qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); | |
344 | mesg[-1] = '\n'; | |
345 | return mesg - buf; | |
346 | } | |
347 | ||
348 | extern int nfsd_nrthreads(void); | |
349 | ||
350 | static ssize_t write_threads(struct file *file, char *buf, size_t size) | |
351 | { | |
352 | /* if size > 0, look for a number of threads and call nfsd_svc | |
353 | * then write out number of threads as reply | |
354 | */ | |
355 | char *mesg = buf; | |
356 | int rv; | |
357 | if (size > 0) { | |
358 | int newthreads; | |
359 | rv = get_int(&mesg, &newthreads); | |
360 | if (rv) | |
361 | return rv; | |
362 | if (newthreads <0) | |
363 | return -EINVAL; | |
364 | rv = nfsd_svc(2049, newthreads); | |
365 | if (rv) | |
366 | return rv; | |
367 | } | |
368 | sprintf(buf, "%d\n", nfsd_nrthreads()); | |
369 | return strlen(buf); | |
370 | } | |
371 | ||
eed2965a GB |
372 | extern int nfsd_nrpools(void); |
373 | extern int nfsd_get_nrthreads(int n, int *); | |
374 | extern int nfsd_set_nrthreads(int n, int *); | |
375 | ||
376 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) | |
377 | { | |
378 | /* if size > 0, look for an array of number of threads per node | |
379 | * and apply them then write out number of threads per node as reply | |
380 | */ | |
381 | char *mesg = buf; | |
382 | int i; | |
383 | int rv; | |
384 | int len; | |
385 | int npools = nfsd_nrpools(); | |
386 | int *nthreads; | |
387 | ||
388 | if (npools == 0) { | |
389 | /* | |
390 | * NFS is shut down. The admin can start it by | |
391 | * writing to the threads file but NOT the pool_threads | |
392 | * file, sorry. Report zero threads. | |
393 | */ | |
394 | strcpy(buf, "0\n"); | |
395 | return strlen(buf); | |
396 | } | |
397 | ||
398 | nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); | |
399 | if (nthreads == NULL) | |
400 | return -ENOMEM; | |
401 | ||
402 | if (size > 0) { | |
403 | for (i = 0; i < npools; i++) { | |
404 | rv = get_int(&mesg, &nthreads[i]); | |
405 | if (rv == -ENOENT) | |
406 | break; /* fewer numbers than pools */ | |
407 | if (rv) | |
408 | goto out_free; /* syntax error */ | |
409 | rv = -EINVAL; | |
410 | if (nthreads[i] < 0) | |
411 | goto out_free; | |
412 | } | |
413 | rv = nfsd_set_nrthreads(i, nthreads); | |
414 | if (rv) | |
415 | goto out_free; | |
416 | } | |
417 | ||
418 | rv = nfsd_get_nrthreads(npools, nthreads); | |
419 | if (rv) | |
420 | goto out_free; | |
421 | ||
422 | mesg = buf; | |
423 | size = SIMPLE_TRANSACTION_LIMIT; | |
424 | for (i = 0; i < npools && size > 0; i++) { | |
425 | snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); | |
426 | len = strlen(mesg); | |
427 | size -= len; | |
428 | mesg += len; | |
429 | } | |
430 | ||
431 | return (mesg-buf); | |
432 | ||
433 | out_free: | |
434 | kfree(nthreads); | |
435 | return rv; | |
436 | } | |
437 | ||
70c3b76c N |
438 | static ssize_t write_versions(struct file *file, char *buf, size_t size) |
439 | { | |
440 | /* | |
441 | * Format: | |
442 | * [-/+]vers [-/+]vers ... | |
443 | */ | |
444 | char *mesg = buf; | |
445 | char *vers, sign; | |
446 | int len, num; | |
447 | ssize_t tlen = 0; | |
448 | char *sep; | |
449 | ||
450 | if (size>0) { | |
451 | if (nfsd_serv) | |
6658d3a7 N |
452 | /* Cannot change versions without updating |
453 | * nfsd_serv->sv_xdrsize, and reallocing | |
454 | * rq_argp and rq_resp | |
455 | */ | |
70c3b76c N |
456 | return -EBUSY; |
457 | if (buf[size-1] != '\n') | |
458 | return -EINVAL; | |
459 | buf[size-1] = 0; | |
460 | ||
461 | vers = mesg; | |
462 | len = qword_get(&mesg, vers, size); | |
463 | if (len <= 0) return -EINVAL; | |
464 | do { | |
465 | sign = *vers; | |
466 | if (sign == '+' || sign == '-') | |
467 | num = simple_strtol((vers+1), NULL, 0); | |
468 | else | |
469 | num = simple_strtol(vers, NULL, 0); | |
470 | switch(num) { | |
471 | case 2: | |
472 | case 3: | |
473 | case 4: | |
6658d3a7 | 474 | nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); |
70c3b76c N |
475 | break; |
476 | default: | |
477 | return -EINVAL; | |
478 | } | |
479 | vers += len + 1; | |
480 | tlen += len; | |
481 | } while ((len = qword_get(&mesg, vers, size)) > 0); | |
482 | /* If all get turned off, turn them back on, as | |
483 | * having no versions is BAD | |
484 | */ | |
6658d3a7 | 485 | nfsd_reset_versions(); |
70c3b76c N |
486 | } |
487 | /* Now write current state into reply buffer */ | |
488 | len = 0; | |
489 | sep = ""; | |
490 | for (num=2 ; num <= 4 ; num++) | |
6658d3a7 | 491 | if (nfsd_vers(num, NFSD_AVAIL)) { |
70c3b76c | 492 | len += sprintf(buf+len, "%s%c%d", sep, |
6658d3a7 | 493 | nfsd_vers(num, NFSD_TEST)?'+':'-', |
70c3b76c N |
494 | num); |
495 | sep = " "; | |
496 | } | |
497 | len += sprintf(buf+len, "\n"); | |
498 | return len; | |
499 | } | |
500 | ||
80212d59 N |
501 | static ssize_t write_ports(struct file *file, char *buf, size_t size) |
502 | { | |
b41b66d6 N |
503 | if (size == 0) { |
504 | int len = 0; | |
505 | lock_kernel(); | |
506 | if (nfsd_serv) | |
507 | len = svc_sock_names(buf, nfsd_serv, NULL); | |
508 | unlock_kernel(); | |
509 | return len; | |
510 | } | |
511 | /* Either a single 'fd' number is written, in which | |
512 | * case it must be for a socket of a supported family/protocol, | |
513 | * and we use it as an nfsd socket, or | |
514 | * A '-' followed by the 'name' of a socket in which case | |
515 | * we close the socket. | |
80212d59 | 516 | */ |
b41b66d6 N |
517 | if (isdigit(buf[0])) { |
518 | char *mesg = buf; | |
519 | int fd; | |
520 | int err; | |
521 | err = get_int(&mesg, &fd); | |
522 | if (err) | |
523 | return -EINVAL; | |
524 | if (fd < 0) | |
525 | return -EINVAL; | |
526 | err = nfsd_create_serv(); | |
527 | if (!err) { | |
528 | int proto = 0; | |
5680c446 N |
529 | err = svc_addsock(nfsd_serv, fd, buf, &proto); |
530 | if (err >= 0) { | |
531 | err = lockd_up(proto); | |
532 | if (err < 0) | |
533 | svc_sock_names(buf+strlen(buf)+1, nfsd_serv, buf); | |
3dfb4210 | 534 | } |
b41b66d6 N |
535 | /* Decrease the count, but don't shutdown the |
536 | * the service | |
537 | */ | |
cda9e0cd | 538 | lock_kernel(); |
b41b66d6 | 539 | nfsd_serv->sv_nrthreads--; |
cda9e0cd | 540 | unlock_kernel(); |
b41b66d6 | 541 | } |
5680c446 | 542 | return err < 0 ? err : 0; |
b41b66d6 N |
543 | } |
544 | if (buf[0] == '-') { | |
545 | char *toclose = kstrdup(buf+1, GFP_KERNEL); | |
546 | int len = 0; | |
547 | if (!toclose) | |
548 | return -ENOMEM; | |
549 | lock_kernel(); | |
550 | if (nfsd_serv) | |
551 | len = svc_sock_names(buf, nfsd_serv, toclose); | |
552 | unlock_kernel(); | |
37a03472 N |
553 | if (len >= 0) |
554 | lockd_down(); | |
b41b66d6 N |
555 | kfree(toclose); |
556 | return len; | |
557 | } | |
558 | return -EINVAL; | |
80212d59 N |
559 | } |
560 | ||
596bbe53 N |
561 | int nfsd_max_blksize; |
562 | ||
563 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) | |
564 | { | |
565 | char *mesg = buf; | |
566 | if (size > 0) { | |
567 | int bsize; | |
568 | int rv = get_int(&mesg, &bsize); | |
569 | if (rv) | |
570 | return rv; | |
571 | /* force bsize into allowed range and | |
572 | * required alignment. | |
573 | */ | |
574 | if (bsize < 1024) | |
575 | bsize = 1024; | |
576 | if (bsize > NFSSVC_MAXBLKSIZE) | |
577 | bsize = NFSSVC_MAXBLKSIZE; | |
578 | bsize &= ~(1024-1); | |
579 | lock_kernel(); | |
580 | if (nfsd_serv && nfsd_serv->sv_nrthreads) { | |
581 | unlock_kernel(); | |
582 | return -EBUSY; | |
583 | } | |
584 | nfsd_max_blksize = bsize; | |
585 | unlock_kernel(); | |
586 | } | |
587 | return sprintf(buf, "%d\n", nfsd_max_blksize); | |
588 | } | |
589 | ||
70c3b76c | 590 | #ifdef CONFIG_NFSD_V4 |
1da177e4 LT |
591 | extern time_t nfs4_leasetime(void); |
592 | ||
593 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size) | |
594 | { | |
595 | /* if size > 10 seconds, call | |
596 | * nfs4_reset_lease() then write out the new lease (seconds) as reply | |
597 | */ | |
598 | char *mesg = buf; | |
599 | int rv; | |
600 | ||
601 | if (size > 0) { | |
602 | int lease; | |
603 | rv = get_int(&mesg, &lease); | |
604 | if (rv) | |
605 | return rv; | |
606 | if (lease < 10 || lease > 3600) | |
607 | return -EINVAL; | |
608 | nfs4_reset_lease(lease); | |
609 | } | |
610 | sprintf(buf, "%ld\n", nfs4_lease_time()); | |
611 | return strlen(buf); | |
612 | } | |
613 | ||
0964a3d3 N |
614 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) |
615 | { | |
616 | char *mesg = buf; | |
617 | char *recdir; | |
618 | int len, status; | |
619 | ||
620 | if (size > PATH_MAX || buf[size-1] != '\n') | |
621 | return -EINVAL; | |
622 | buf[size-1] = 0; | |
623 | ||
624 | recdir = mesg; | |
625 | len = qword_get(&mesg, recdir, size); | |
626 | if (len <= 0) | |
627 | return -EINVAL; | |
628 | ||
629 | status = nfs4_reset_recoverydir(recdir); | |
630 | return strlen(buf); | |
631 | } | |
70c3b76c | 632 | #endif |
0964a3d3 | 633 | |
1da177e4 LT |
634 | /*----------------------------------------------------------------------------*/ |
635 | /* | |
636 | * populating the filesystem. | |
637 | */ | |
638 | ||
639 | static int nfsd_fill_super(struct super_block * sb, void * data, int silent) | |
640 | { | |
641 | static struct tree_descr nfsd_files[] = { | |
642 | [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR}, | |
643 | [NFSD_Add] = {".add", &transaction_ops, S_IWUSR}, | |
644 | [NFSD_Del] = {".del", &transaction_ops, S_IWUSR}, | |
645 | [NFSD_Export] = {".export", &transaction_ops, S_IWUSR}, | |
646 | [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR}, | |
647 | [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR}, | |
648 | [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR}, | |
649 | [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, | |
650 | [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, | |
651 | [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, | |
eed2965a | 652 | [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, |
70c3b76c | 653 | [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, |
80212d59 | 654 | [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, |
596bbe53 | 655 | [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, |
1da177e4 LT |
656 | #ifdef CONFIG_NFSD_V4 |
657 | [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, | |
0964a3d3 | 658 | [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, |
1da177e4 LT |
659 | #endif |
660 | /* last one */ {""} | |
661 | }; | |
662 | return simple_fill_super(sb, 0x6e667364, nfsd_files); | |
663 | } | |
664 | ||
454e2398 DH |
665 | static int nfsd_get_sb(struct file_system_type *fs_type, |
666 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 667 | { |
454e2398 | 668 | return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt); |
1da177e4 LT |
669 | } |
670 | ||
671 | static struct file_system_type nfsd_fs_type = { | |
672 | .owner = THIS_MODULE, | |
673 | .name = "nfsd", | |
674 | .get_sb = nfsd_get_sb, | |
675 | .kill_sb = kill_litter_super, | |
676 | }; | |
677 | ||
678 | static int __init init_nfsd(void) | |
679 | { | |
680 | int retval; | |
681 | printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); | |
682 | ||
683 | nfsd_stat_init(); /* Statistics */ | |
684 | nfsd_cache_init(); /* RPC reply cache */ | |
685 | nfsd_export_init(); /* Exports table */ | |
686 | nfsd_lockd_init(); /* lockd->nfsd callbacks */ | |
ac4d8ff2 | 687 | nfs4_state_init(); /* NFSv4 locking state */ |
1da177e4 | 688 | nfsd_idmap_init(); /* Name to ID mapping */ |
1da177e4 LT |
689 | if (proc_mkdir("fs/nfs", NULL)) { |
690 | struct proc_dir_entry *entry; | |
691 | entry = create_proc_entry("fs/nfs/exports", 0, NULL); | |
692 | if (entry) | |
693 | entry->proc_fops = &exports_operations; | |
694 | } | |
695 | retval = register_filesystem(&nfsd_fs_type); | |
696 | if (retval) { | |
697 | nfsd_export_shutdown(); | |
698 | nfsd_cache_shutdown(); | |
699 | remove_proc_entry("fs/nfs/exports", NULL); | |
700 | remove_proc_entry("fs/nfs", NULL); | |
701 | nfsd_stat_shutdown(); | |
702 | nfsd_lockd_shutdown(); | |
703 | } | |
704 | return retval; | |
705 | } | |
706 | ||
707 | static void __exit exit_nfsd(void) | |
708 | { | |
709 | nfsd_export_shutdown(); | |
710 | nfsd_cache_shutdown(); | |
711 | remove_proc_entry("fs/nfs/exports", NULL); | |
712 | remove_proc_entry("fs/nfs", NULL); | |
713 | nfsd_stat_shutdown(); | |
714 | nfsd_lockd_shutdown(); | |
1da177e4 | 715 | nfsd_idmap_shutdown(); |
1da177e4 LT |
716 | unregister_filesystem(&nfsd_fs_type); |
717 | } | |
718 | ||
719 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
720 | MODULE_LICENSE("GPL"); | |
721 | module_init(init_nfsd) | |
722 | module_exit(exit_nfsd) |