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> | |
1da177e4 LT |
38 | |
39 | #include <asm/uaccess.h> | |
40 | ||
41 | /* | |
42 | * We have a single directory with 9 nodes in it. | |
43 | */ | |
44 | enum { | |
45 | NFSD_Root = 1, | |
46 | NFSD_Svc, | |
47 | NFSD_Add, | |
48 | NFSD_Del, | |
49 | NFSD_Export, | |
50 | NFSD_Unexport, | |
51 | NFSD_Getfd, | |
52 | NFSD_Getfs, | |
53 | NFSD_List, | |
54 | NFSD_Fh, | |
55 | NFSD_Threads, | |
eed2965a | 56 | NFSD_Pool_Threads, |
70c3b76c | 57 | NFSD_Versions, |
80212d59 | 58 | NFSD_Ports, |
596bbe53 | 59 | NFSD_MaxBlkSize, |
70c3b76c N |
60 | /* |
61 | * The below MUST come last. Otherwise we leave a hole in nfsd_files[] | |
62 | * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops | |
63 | */ | |
64 | #ifdef CONFIG_NFSD_V4 | |
1da177e4 | 65 | NFSD_Leasetime, |
0964a3d3 | 66 | NFSD_RecoveryDir, |
70c3b76c | 67 | #endif |
1da177e4 LT |
68 | }; |
69 | ||
70 | /* | |
71 | * write() for these nodes. | |
72 | */ | |
73 | static ssize_t write_svc(struct file *file, char *buf, size_t size); | |
74 | static ssize_t write_add(struct file *file, char *buf, size_t size); | |
75 | static ssize_t write_del(struct file *file, char *buf, size_t size); | |
76 | static ssize_t write_export(struct file *file, char *buf, size_t size); | |
77 | static ssize_t write_unexport(struct file *file, char *buf, size_t size); | |
78 | static ssize_t write_getfd(struct file *file, char *buf, size_t size); | |
79 | static ssize_t write_getfs(struct file *file, char *buf, size_t size); | |
80 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size); | |
81 | static ssize_t write_threads(struct file *file, char *buf, size_t size); | |
eed2965a | 82 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); |
70c3b76c | 83 | static ssize_t write_versions(struct file *file, char *buf, size_t size); |
80212d59 | 84 | static ssize_t write_ports(struct file *file, char *buf, size_t size); |
596bbe53 | 85 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); |
70c3b76c | 86 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 87 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size); |
0964a3d3 | 88 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); |
70c3b76c | 89 | #endif |
1da177e4 LT |
90 | |
91 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { | |
92 | [NFSD_Svc] = write_svc, | |
93 | [NFSD_Add] = write_add, | |
94 | [NFSD_Del] = write_del, | |
95 | [NFSD_Export] = write_export, | |
96 | [NFSD_Unexport] = write_unexport, | |
97 | [NFSD_Getfd] = write_getfd, | |
98 | [NFSD_Getfs] = write_getfs, | |
99 | [NFSD_Fh] = write_filehandle, | |
100 | [NFSD_Threads] = write_threads, | |
eed2965a | 101 | [NFSD_Pool_Threads] = write_pool_threads, |
70c3b76c | 102 | [NFSD_Versions] = write_versions, |
80212d59 | 103 | [NFSD_Ports] = write_ports, |
596bbe53 | 104 | [NFSD_MaxBlkSize] = write_maxblksize, |
70c3b76c | 105 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 106 | [NFSD_Leasetime] = write_leasetime, |
0964a3d3 | 107 | [NFSD_RecoveryDir] = write_recoverydir, |
70c3b76c | 108 | #endif |
1da177e4 LT |
109 | }; |
110 | ||
111 | static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
112 | { | |
7eaa36e2 | 113 | ino_t ino = file->f_path.dentry->d_inode->i_ino; |
1da177e4 LT |
114 | char *data; |
115 | ssize_t rv; | |
116 | ||
e8c96f8c | 117 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
1da177e4 LT |
118 | return -EINVAL; |
119 | ||
120 | data = simple_transaction_get(file, buf, size); | |
121 | if (IS_ERR(data)) | |
122 | return PTR_ERR(data); | |
123 | ||
124 | rv = write_op[ino](file, data, size); | |
8971a101 | 125 | if (rv >= 0) { |
1da177e4 LT |
126 | simple_transaction_set(file, rv); |
127 | rv = size; | |
128 | } | |
129 | return rv; | |
130 | } | |
131 | ||
7390022d N |
132 | static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) |
133 | { | |
134 | if (! file->private_data) { | |
135 | /* An attempt to read a transaction file without writing | |
136 | * causes a 0-byte write so that the file can return | |
137 | * state information | |
138 | */ | |
139 | ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); | |
140 | if (rv < 0) | |
141 | return rv; | |
142 | } | |
143 | return simple_transaction_read(file, buf, size, pos); | |
144 | } | |
145 | ||
4b6f5d20 | 146 | static const struct file_operations transaction_ops = { |
1da177e4 | 147 | .write = nfsctl_transaction_write, |
7390022d | 148 | .read = nfsctl_transaction_read, |
1da177e4 LT |
149 | .release = simple_transaction_release, |
150 | }; | |
151 | ||
152 | extern struct seq_operations nfs_exports_op; | |
153 | static int exports_open(struct inode *inode, struct file *file) | |
154 | { | |
155 | return seq_open(file, &nfs_exports_op); | |
156 | } | |
157 | ||
4b6f5d20 | 158 | static const struct file_operations exports_operations = { |
1da177e4 LT |
159 | .open = exports_open, |
160 | .read = seq_read, | |
161 | .llseek = seq_lseek, | |
162 | .release = seq_release, | |
163 | }; | |
164 | ||
165 | /*----------------------------------------------------------------------------*/ | |
166 | /* | |
167 | * payload - write methods | |
168 | * If the method has a response, the response should be put in buf, | |
169 | * and the length returned. Otherwise return 0 or and -error. | |
170 | */ | |
171 | ||
172 | static ssize_t write_svc(struct file *file, char *buf, size_t size) | |
173 | { | |
174 | struct nfsctl_svc *data; | |
175 | if (size < sizeof(*data)) | |
176 | return -EINVAL; | |
177 | data = (struct nfsctl_svc*) buf; | |
178 | return nfsd_svc(data->svc_port, data->svc_nthreads); | |
179 | } | |
180 | ||
181 | static ssize_t write_add(struct file *file, char *buf, size_t size) | |
182 | { | |
183 | struct nfsctl_client *data; | |
184 | if (size < sizeof(*data)) | |
185 | return -EINVAL; | |
186 | data = (struct nfsctl_client *)buf; | |
187 | return exp_addclient(data); | |
188 | } | |
189 | ||
190 | static ssize_t write_del(struct file *file, char *buf, size_t size) | |
191 | { | |
192 | struct nfsctl_client *data; | |
193 | if (size < sizeof(*data)) | |
194 | return -EINVAL; | |
195 | data = (struct nfsctl_client *)buf; | |
196 | return exp_delclient(data); | |
197 | } | |
198 | ||
199 | static ssize_t write_export(struct file *file, char *buf, size_t size) | |
200 | { | |
201 | struct nfsctl_export *data; | |
202 | if (size < sizeof(*data)) | |
203 | return -EINVAL; | |
204 | data = (struct nfsctl_export*)buf; | |
205 | return exp_export(data); | |
206 | } | |
207 | ||
208 | static ssize_t write_unexport(struct file *file, char *buf, size_t size) | |
209 | { | |
210 | struct nfsctl_export *data; | |
211 | ||
212 | if (size < sizeof(*data)) | |
213 | return -EINVAL; | |
214 | data = (struct nfsctl_export*)buf; | |
215 | return exp_unexport(data); | |
216 | } | |
217 | ||
218 | static ssize_t write_getfs(struct file *file, char *buf, size_t size) | |
219 | { | |
220 | struct nfsctl_fsparm *data; | |
221 | struct sockaddr_in *sin; | |
222 | struct auth_domain *clp; | |
223 | int err = 0; | |
224 | struct knfsd_fh *res; | |
225 | ||
226 | if (size < sizeof(*data)) | |
227 | return -EINVAL; | |
228 | data = (struct nfsctl_fsparm*)buf; | |
229 | err = -EPROTONOSUPPORT; | |
230 | if (data->gd_addr.sa_family != AF_INET) | |
231 | goto out; | |
232 | sin = (struct sockaddr_in *)&data->gd_addr; | |
233 | if (data->gd_maxlen > NFS3_FHSIZE) | |
234 | data->gd_maxlen = NFS3_FHSIZE; | |
235 | ||
236 | res = (struct knfsd_fh*)buf; | |
237 | ||
238 | exp_readlock(); | |
239 | if (!(clp = auth_unix_lookup(sin->sin_addr))) | |
240 | err = -EPERM; | |
241 | else { | |
242 | err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen); | |
243 | auth_domain_put(clp); | |
244 | } | |
245 | exp_readunlock(); | |
246 | if (err == 0) | |
12127498 | 247 | err = res->fh_size + offsetof(struct knfsd_fh, fh_base); |
1da177e4 LT |
248 | out: |
249 | return err; | |
250 | } | |
251 | ||
252 | static ssize_t write_getfd(struct file *file, char *buf, size_t size) | |
253 | { | |
254 | struct nfsctl_fdparm *data; | |
255 | struct sockaddr_in *sin; | |
256 | struct auth_domain *clp; | |
257 | int err = 0; | |
258 | struct knfsd_fh fh; | |
259 | char *res; | |
260 | ||
261 | if (size < sizeof(*data)) | |
262 | return -EINVAL; | |
263 | data = (struct nfsctl_fdparm*)buf; | |
264 | err = -EPROTONOSUPPORT; | |
265 | if (data->gd_addr.sa_family != AF_INET) | |
266 | goto out; | |
267 | err = -EINVAL; | |
268 | if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS) | |
269 | goto out; | |
270 | ||
271 | res = buf; | |
272 | sin = (struct sockaddr_in *)&data->gd_addr; | |
273 | exp_readlock(); | |
274 | if (!(clp = auth_unix_lookup(sin->sin_addr))) | |
275 | err = -EPERM; | |
276 | else { | |
277 | err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE); | |
278 | auth_domain_put(clp); | |
279 | } | |
280 | exp_readunlock(); | |
281 | ||
282 | if (err == 0) { | |
283 | memset(res,0, NFS_FHSIZE); | |
284 | memcpy(res, &fh.fh_base, fh.fh_size); | |
285 | err = NFS_FHSIZE; | |
286 | } | |
287 | out: | |
288 | return err; | |
289 | } | |
290 | ||
291 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size) | |
292 | { | |
293 | /* request is: | |
294 | * domain path maxsize | |
295 | * response is | |
296 | * filehandle | |
297 | * | |
298 | * qword quoting is used, so filehandle will be \x.... | |
299 | */ | |
300 | char *dname, *path; | |
246d95ba | 301 | int uninitialized_var(maxsize); |
1da177e4 LT |
302 | char *mesg = buf; |
303 | int len; | |
304 | struct auth_domain *dom; | |
305 | struct knfsd_fh fh; | |
306 | ||
87d26ea7 BF |
307 | if (size == 0) |
308 | return -EINVAL; | |
309 | ||
1da177e4 LT |
310 | if (buf[size-1] != '\n') |
311 | return -EINVAL; | |
312 | buf[size-1] = 0; | |
313 | ||
314 | dname = mesg; | |
315 | len = qword_get(&mesg, dname, size); | |
316 | if (len <= 0) return -EINVAL; | |
317 | ||
318 | path = dname+len+1; | |
319 | len = qword_get(&mesg, path, size); | |
320 | if (len <= 0) return -EINVAL; | |
321 | ||
322 | len = get_int(&mesg, &maxsize); | |
323 | if (len) | |
324 | return len; | |
325 | ||
326 | if (maxsize < NFS_FHSIZE) | |
327 | return -EINVAL; | |
328 | if (maxsize > NFS3_FHSIZE) | |
329 | maxsize = NFS3_FHSIZE; | |
330 | ||
331 | if (qword_get(&mesg, mesg, size)>0) | |
332 | return -EINVAL; | |
333 | ||
334 | /* we have all the words, they are in buf.. */ | |
335 | dom = unix_domain_find(dname); | |
336 | if (!dom) | |
337 | return -ENOMEM; | |
338 | ||
339 | len = exp_rootfh(dom, path, &fh, maxsize); | |
340 | auth_domain_put(dom); | |
341 | if (len) | |
342 | return len; | |
343 | ||
344 | mesg = buf; len = SIMPLE_TRANSACTION_LIMIT; | |
345 | qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); | |
346 | mesg[-1] = '\n'; | |
347 | return mesg - buf; | |
348 | } | |
349 | ||
350 | extern int nfsd_nrthreads(void); | |
351 | ||
352 | static ssize_t write_threads(struct file *file, char *buf, size_t size) | |
353 | { | |
354 | /* if size > 0, look for a number of threads and call nfsd_svc | |
355 | * then write out number of threads as reply | |
356 | */ | |
357 | char *mesg = buf; | |
358 | int rv; | |
359 | if (size > 0) { | |
360 | int newthreads; | |
361 | rv = get_int(&mesg, &newthreads); | |
362 | if (rv) | |
363 | return rv; | |
364 | if (newthreads <0) | |
365 | return -EINVAL; | |
366 | rv = nfsd_svc(2049, newthreads); | |
367 | if (rv) | |
368 | return rv; | |
369 | } | |
370 | sprintf(buf, "%d\n", nfsd_nrthreads()); | |
371 | return strlen(buf); | |
372 | } | |
373 | ||
eed2965a GB |
374 | extern int nfsd_nrpools(void); |
375 | extern int nfsd_get_nrthreads(int n, int *); | |
376 | extern int nfsd_set_nrthreads(int n, int *); | |
377 | ||
378 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) | |
379 | { | |
380 | /* if size > 0, look for an array of number of threads per node | |
381 | * and apply them then write out number of threads per node as reply | |
382 | */ | |
383 | char *mesg = buf; | |
384 | int i; | |
385 | int rv; | |
386 | int len; | |
387 | int npools = nfsd_nrpools(); | |
388 | int *nthreads; | |
389 | ||
390 | if (npools == 0) { | |
391 | /* | |
392 | * NFS is shut down. The admin can start it by | |
393 | * writing to the threads file but NOT the pool_threads | |
394 | * file, sorry. Report zero threads. | |
395 | */ | |
396 | strcpy(buf, "0\n"); | |
397 | return strlen(buf); | |
398 | } | |
399 | ||
400 | nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); | |
401 | if (nthreads == NULL) | |
402 | return -ENOMEM; | |
403 | ||
404 | if (size > 0) { | |
405 | for (i = 0; i < npools; i++) { | |
406 | rv = get_int(&mesg, &nthreads[i]); | |
407 | if (rv == -ENOENT) | |
408 | break; /* fewer numbers than pools */ | |
409 | if (rv) | |
410 | goto out_free; /* syntax error */ | |
411 | rv = -EINVAL; | |
412 | if (nthreads[i] < 0) | |
413 | goto out_free; | |
414 | } | |
415 | rv = nfsd_set_nrthreads(i, nthreads); | |
416 | if (rv) | |
417 | goto out_free; | |
418 | } | |
419 | ||
420 | rv = nfsd_get_nrthreads(npools, nthreads); | |
421 | if (rv) | |
422 | goto out_free; | |
423 | ||
424 | mesg = buf; | |
425 | size = SIMPLE_TRANSACTION_LIMIT; | |
426 | for (i = 0; i < npools && size > 0; i++) { | |
427 | snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); | |
428 | len = strlen(mesg); | |
429 | size -= len; | |
430 | mesg += len; | |
431 | } | |
432 | ||
433 | return (mesg-buf); | |
434 | ||
435 | out_free: | |
436 | kfree(nthreads); | |
437 | return rv; | |
438 | } | |
439 | ||
70c3b76c N |
440 | static ssize_t write_versions(struct file *file, char *buf, size_t size) |
441 | { | |
442 | /* | |
443 | * Format: | |
444 | * [-/+]vers [-/+]vers ... | |
445 | */ | |
446 | char *mesg = buf; | |
447 | char *vers, sign; | |
448 | int len, num; | |
449 | ssize_t tlen = 0; | |
450 | char *sep; | |
451 | ||
452 | if (size>0) { | |
453 | if (nfsd_serv) | |
6658d3a7 N |
454 | /* Cannot change versions without updating |
455 | * nfsd_serv->sv_xdrsize, and reallocing | |
456 | * rq_argp and rq_resp | |
457 | */ | |
70c3b76c N |
458 | return -EBUSY; |
459 | if (buf[size-1] != '\n') | |
460 | return -EINVAL; | |
461 | buf[size-1] = 0; | |
462 | ||
463 | vers = mesg; | |
464 | len = qword_get(&mesg, vers, size); | |
465 | if (len <= 0) return -EINVAL; | |
466 | do { | |
467 | sign = *vers; | |
468 | if (sign == '+' || sign == '-') | |
469 | num = simple_strtol((vers+1), NULL, 0); | |
470 | else | |
471 | num = simple_strtol(vers, NULL, 0); | |
472 | switch(num) { | |
473 | case 2: | |
474 | case 3: | |
475 | case 4: | |
6658d3a7 | 476 | nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); |
70c3b76c N |
477 | break; |
478 | default: | |
479 | return -EINVAL; | |
480 | } | |
481 | vers += len + 1; | |
482 | tlen += len; | |
483 | } while ((len = qword_get(&mesg, vers, size)) > 0); | |
484 | /* If all get turned off, turn them back on, as | |
485 | * having no versions is BAD | |
486 | */ | |
6658d3a7 | 487 | nfsd_reset_versions(); |
70c3b76c N |
488 | } |
489 | /* Now write current state into reply buffer */ | |
490 | len = 0; | |
491 | sep = ""; | |
492 | for (num=2 ; num <= 4 ; num++) | |
6658d3a7 | 493 | if (nfsd_vers(num, NFSD_AVAIL)) { |
70c3b76c | 494 | len += sprintf(buf+len, "%s%c%d", sep, |
6658d3a7 | 495 | nfsd_vers(num, NFSD_TEST)?'+':'-', |
70c3b76c N |
496 | num); |
497 | sep = " "; | |
498 | } | |
499 | len += sprintf(buf+len, "\n"); | |
500 | return len; | |
501 | } | |
502 | ||
80212d59 N |
503 | static ssize_t write_ports(struct file *file, char *buf, size_t size) |
504 | { | |
b41b66d6 N |
505 | if (size == 0) { |
506 | int len = 0; | |
507 | lock_kernel(); | |
508 | if (nfsd_serv) | |
9571af18 | 509 | len = svc_xprt_names(nfsd_serv, buf, 0); |
b41b66d6 N |
510 | unlock_kernel(); |
511 | return len; | |
512 | } | |
513 | /* Either a single 'fd' number is written, in which | |
514 | * case it must be for a socket of a supported family/protocol, | |
515 | * and we use it as an nfsd socket, or | |
516 | * A '-' followed by the 'name' of a socket in which case | |
517 | * we close the socket. | |
80212d59 | 518 | */ |
b41b66d6 N |
519 | if (isdigit(buf[0])) { |
520 | char *mesg = buf; | |
521 | int fd; | |
522 | int err; | |
523 | err = get_int(&mesg, &fd); | |
524 | if (err) | |
525 | return -EINVAL; | |
526 | if (fd < 0) | |
527 | return -EINVAL; | |
528 | err = nfsd_create_serv(); | |
529 | if (!err) { | |
530 | int proto = 0; | |
5680c446 N |
531 | err = svc_addsock(nfsd_serv, fd, buf, &proto); |
532 | if (err >= 0) { | |
533 | err = lockd_up(proto); | |
534 | if (err < 0) | |
535 | svc_sock_names(buf+strlen(buf)+1, nfsd_serv, buf); | |
3dfb4210 | 536 | } |
b41b66d6 N |
537 | /* Decrease the count, but don't shutdown the |
538 | * the service | |
539 | */ | |
cda9e0cd | 540 | lock_kernel(); |
b41b66d6 | 541 | nfsd_serv->sv_nrthreads--; |
cda9e0cd | 542 | unlock_kernel(); |
b41b66d6 | 543 | } |
5680c446 | 544 | return err < 0 ? err : 0; |
b41b66d6 | 545 | } |
a217813f | 546 | if (buf[0] == '-' && isdigit(buf[1])) { |
b41b66d6 N |
547 | char *toclose = kstrdup(buf+1, GFP_KERNEL); |
548 | int len = 0; | |
549 | if (!toclose) | |
550 | return -ENOMEM; | |
551 | lock_kernel(); | |
552 | if (nfsd_serv) | |
553 | len = svc_sock_names(buf, nfsd_serv, toclose); | |
554 | unlock_kernel(); | |
37a03472 N |
555 | if (len >= 0) |
556 | lockd_down(); | |
b41b66d6 N |
557 | kfree(toclose); |
558 | return len; | |
559 | } | |
a217813f TT |
560 | /* |
561 | * Add a transport listener by writing it's transport name | |
562 | */ | |
563 | if (isalpha(buf[0])) { | |
564 | int err; | |
565 | char transport[16]; | |
566 | int port; | |
567 | if (sscanf(buf, "%15s %4d", transport, &port) == 2) { | |
568 | err = nfsd_create_serv(); | |
569 | if (!err) { | |
570 | err = svc_create_xprt(nfsd_serv, | |
571 | transport, port, | |
572 | SVC_SOCK_ANONYMOUS); | |
573 | if (err == -ENOENT) | |
574 | /* Give a reasonable perror msg for | |
575 | * bad transport string */ | |
576 | err = -EPROTONOSUPPORT; | |
577 | } | |
578 | return err < 0 ? err : 0; | |
579 | } | |
580 | } | |
581 | /* | |
582 | * Remove a transport by writing it's transport name and port number | |
583 | */ | |
584 | if (buf[0] == '-' && isalpha(buf[1])) { | |
585 | struct svc_xprt *xprt; | |
586 | int err = -EINVAL; | |
587 | char transport[16]; | |
588 | int port; | |
589 | if (sscanf(&buf[1], "%15s %4d", transport, &port) == 2) { | |
590 | if (port == 0) | |
591 | return -EINVAL; | |
592 | lock_kernel(); | |
593 | if (nfsd_serv) { | |
594 | xprt = svc_find_xprt(nfsd_serv, transport, | |
595 | AF_UNSPEC, port); | |
596 | if (xprt) { | |
597 | svc_close_xprt(xprt); | |
598 | svc_xprt_put(xprt); | |
599 | err = 0; | |
600 | } else | |
601 | err = -ENOTCONN; | |
602 | } | |
603 | unlock_kernel(); | |
604 | return err < 0 ? err : 0; | |
605 | } | |
606 | } | |
b41b66d6 | 607 | return -EINVAL; |
80212d59 N |
608 | } |
609 | ||
596bbe53 N |
610 | int nfsd_max_blksize; |
611 | ||
612 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) | |
613 | { | |
614 | char *mesg = buf; | |
615 | if (size > 0) { | |
616 | int bsize; | |
617 | int rv = get_int(&mesg, &bsize); | |
618 | if (rv) | |
619 | return rv; | |
620 | /* force bsize into allowed range and | |
621 | * required alignment. | |
622 | */ | |
623 | if (bsize < 1024) | |
624 | bsize = 1024; | |
625 | if (bsize > NFSSVC_MAXBLKSIZE) | |
626 | bsize = NFSSVC_MAXBLKSIZE; | |
627 | bsize &= ~(1024-1); | |
628 | lock_kernel(); | |
629 | if (nfsd_serv && nfsd_serv->sv_nrthreads) { | |
630 | unlock_kernel(); | |
631 | return -EBUSY; | |
632 | } | |
633 | nfsd_max_blksize = bsize; | |
634 | unlock_kernel(); | |
635 | } | |
636 | return sprintf(buf, "%d\n", nfsd_max_blksize); | |
637 | } | |
638 | ||
70c3b76c | 639 | #ifdef CONFIG_NFSD_V4 |
1da177e4 LT |
640 | extern time_t nfs4_leasetime(void); |
641 | ||
642 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size) | |
643 | { | |
644 | /* if size > 10 seconds, call | |
645 | * nfs4_reset_lease() then write out the new lease (seconds) as reply | |
646 | */ | |
647 | char *mesg = buf; | |
648 | int rv; | |
649 | ||
650 | if (size > 0) { | |
651 | int lease; | |
652 | rv = get_int(&mesg, &lease); | |
653 | if (rv) | |
654 | return rv; | |
655 | if (lease < 10 || lease > 3600) | |
656 | return -EINVAL; | |
657 | nfs4_reset_lease(lease); | |
658 | } | |
659 | sprintf(buf, "%ld\n", nfs4_lease_time()); | |
660 | return strlen(buf); | |
661 | } | |
662 | ||
0964a3d3 N |
663 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) |
664 | { | |
665 | char *mesg = buf; | |
666 | char *recdir; | |
667 | int len, status; | |
668 | ||
87d26ea7 | 669 | if (size == 0 || size > PATH_MAX || buf[size-1] != '\n') |
0964a3d3 N |
670 | return -EINVAL; |
671 | buf[size-1] = 0; | |
672 | ||
673 | recdir = mesg; | |
674 | len = qword_get(&mesg, recdir, size); | |
675 | if (len <= 0) | |
676 | return -EINVAL; | |
677 | ||
678 | status = nfs4_reset_recoverydir(recdir); | |
679 | return strlen(buf); | |
680 | } | |
70c3b76c | 681 | #endif |
0964a3d3 | 682 | |
1da177e4 LT |
683 | /*----------------------------------------------------------------------------*/ |
684 | /* | |
685 | * populating the filesystem. | |
686 | */ | |
687 | ||
688 | static int nfsd_fill_super(struct super_block * sb, void * data, int silent) | |
689 | { | |
690 | static struct tree_descr nfsd_files[] = { | |
691 | [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR}, | |
692 | [NFSD_Add] = {".add", &transaction_ops, S_IWUSR}, | |
693 | [NFSD_Del] = {".del", &transaction_ops, S_IWUSR}, | |
694 | [NFSD_Export] = {".export", &transaction_ops, S_IWUSR}, | |
695 | [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR}, | |
696 | [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR}, | |
697 | [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR}, | |
698 | [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, | |
699 | [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, | |
700 | [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, | |
eed2965a | 701 | [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, |
70c3b76c | 702 | [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, |
80212d59 | 703 | [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, |
596bbe53 | 704 | [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, |
1da177e4 LT |
705 | #ifdef CONFIG_NFSD_V4 |
706 | [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, | |
0964a3d3 | 707 | [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, |
1da177e4 LT |
708 | #endif |
709 | /* last one */ {""} | |
710 | }; | |
711 | return simple_fill_super(sb, 0x6e667364, nfsd_files); | |
712 | } | |
713 | ||
454e2398 DH |
714 | static int nfsd_get_sb(struct file_system_type *fs_type, |
715 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 716 | { |
454e2398 | 717 | return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt); |
1da177e4 LT |
718 | } |
719 | ||
720 | static struct file_system_type nfsd_fs_type = { | |
721 | .owner = THIS_MODULE, | |
722 | .name = "nfsd", | |
723 | .get_sb = nfsd_get_sb, | |
724 | .kill_sb = kill_litter_super, | |
725 | }; | |
726 | ||
e331f606 BF |
727 | #ifdef CONFIG_PROC_FS |
728 | static int create_proc_exports_entry(void) | |
729 | { | |
730 | struct proc_dir_entry *entry; | |
731 | ||
732 | entry = proc_mkdir("fs/nfs", NULL); | |
733 | if (!entry) | |
734 | return -ENOMEM; | |
735 | entry = create_proc_entry("fs/nfs/exports", 0, NULL); | |
736 | if (!entry) | |
737 | return -ENOMEM; | |
738 | entry->proc_fops = &exports_operations; | |
739 | return 0; | |
740 | } | |
741 | #else /* CONFIG_PROC_FS */ | |
742 | static int create_proc_exports_entry(void) | |
743 | { | |
744 | return 0; | |
745 | } | |
746 | #endif | |
747 | ||
1da177e4 LT |
748 | static int __init init_nfsd(void) |
749 | { | |
750 | int retval; | |
751 | printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); | |
752 | ||
e8ff2a84 BF |
753 | retval = nfs4_state_init(); /* nfs4 locking state */ |
754 | if (retval) | |
755 | return retval; | |
1da177e4 | 756 | nfsd_stat_init(); /* Statistics */ |
d5c3428b BF |
757 | retval = nfsd_reply_cache_init(); |
758 | if (retval) | |
759 | goto out_free_stat; | |
dbf847ec BF |
760 | retval = nfsd_export_init(); |
761 | if (retval) | |
762 | goto out_free_cache; | |
1da177e4 | 763 | nfsd_lockd_init(); /* lockd->nfsd callbacks */ |
dbf847ec BF |
764 | retval = nfsd_idmap_init(); |
765 | if (retval) | |
766 | goto out_free_lockd; | |
e331f606 BF |
767 | retval = create_proc_exports_entry(); |
768 | if (retval) | |
769 | goto out_free_idmap; | |
1da177e4 | 770 | retval = register_filesystem(&nfsd_fs_type); |
26808d3f BF |
771 | if (retval) |
772 | goto out_free_all; | |
773 | return 0; | |
774 | out_free_all: | |
26808d3f BF |
775 | remove_proc_entry("fs/nfs/exports", NULL); |
776 | remove_proc_entry("fs/nfs", NULL); | |
e331f606 | 777 | out_free_idmap: |
dbf847ec BF |
778 | nfsd_idmap_shutdown(); |
779 | out_free_lockd: | |
26808d3f | 780 | nfsd_lockd_shutdown(); |
e331f606 | 781 | nfsd_export_shutdown(); |
dbf847ec | 782 | out_free_cache: |
e331f606 | 783 | nfsd_reply_cache_shutdown(); |
d5c3428b BF |
784 | out_free_stat: |
785 | nfsd_stat_shutdown(); | |
26808d3f | 786 | nfsd4_free_slabs(); |
1da177e4 LT |
787 | return retval; |
788 | } | |
789 | ||
790 | static void __exit exit_nfsd(void) | |
791 | { | |
792 | nfsd_export_shutdown(); | |
d5c3428b | 793 | nfsd_reply_cache_shutdown(); |
1da177e4 LT |
794 | remove_proc_entry("fs/nfs/exports", NULL); |
795 | remove_proc_entry("fs/nfs", NULL); | |
796 | nfsd_stat_shutdown(); | |
797 | nfsd_lockd_shutdown(); | |
1da177e4 | 798 | nfsd_idmap_shutdown(); |
e8ff2a84 | 799 | nfsd4_free_slabs(); |
1da177e4 LT |
800 | unregister_filesystem(&nfsd_fs_type); |
801 | } | |
802 | ||
803 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
804 | MODULE_LICENSE("GPL"); | |
805 | module_init(init_nfsd) | |
806 | module_exit(exit_nfsd) |