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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> | |
4373ea84 | 25 | #include <linux/inet.h> |
70c3b76c | 26 | #include <linux/string.h> |
80212d59 | 27 | #include <linux/smp_lock.h> |
b41b66d6 | 28 | #include <linux/ctype.h> |
1da177e4 LT |
29 | |
30 | #include <linux/nfs.h> | |
31 | #include <linux/nfsd_idmap.h> | |
b41b66d6 | 32 | #include <linux/lockd/bind.h> |
1da177e4 | 33 | #include <linux/sunrpc/svc.h> |
80212d59 | 34 | #include <linux/sunrpc/svcsock.h> |
1da177e4 LT |
35 | #include <linux/nfsd/nfsd.h> |
36 | #include <linux/nfsd/cache.h> | |
37 | #include <linux/nfsd/xdr.h> | |
38 | #include <linux/nfsd/syscall.h> | |
4373ea84 | 39 | #include <linux/lockd/lockd.h> |
1da177e4 LT |
40 | |
41 | #include <asm/uaccess.h> | |
f15364bd | 42 | #include <net/ipv6.h> |
1da177e4 LT |
43 | |
44 | /* | |
45 | * We have a single directory with 9 nodes in it. | |
46 | */ | |
47 | enum { | |
48 | NFSD_Root = 1, | |
49 | NFSD_Svc, | |
50 | NFSD_Add, | |
51 | NFSD_Del, | |
52 | NFSD_Export, | |
53 | NFSD_Unexport, | |
54 | NFSD_Getfd, | |
55 | NFSD_Getfs, | |
56 | NFSD_List, | |
57 | NFSD_Fh, | |
4373ea84 | 58 | NFSD_FO_UnlockIP, |
1da177e4 | 59 | NFSD_Threads, |
eed2965a | 60 | NFSD_Pool_Threads, |
70c3b76c | 61 | NFSD_Versions, |
80212d59 | 62 | NFSD_Ports, |
596bbe53 | 63 | NFSD_MaxBlkSize, |
70c3b76c N |
64 | /* |
65 | * The below MUST come last. Otherwise we leave a hole in nfsd_files[] | |
66 | * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops | |
67 | */ | |
68 | #ifdef CONFIG_NFSD_V4 | |
1da177e4 | 69 | NFSD_Leasetime, |
0964a3d3 | 70 | NFSD_RecoveryDir, |
70c3b76c | 71 | #endif |
1da177e4 LT |
72 | }; |
73 | ||
74 | /* | |
75 | * write() for these nodes. | |
76 | */ | |
77 | static ssize_t write_svc(struct file *file, char *buf, size_t size); | |
78 | static ssize_t write_add(struct file *file, char *buf, size_t size); | |
79 | static ssize_t write_del(struct file *file, char *buf, size_t size); | |
80 | static ssize_t write_export(struct file *file, char *buf, size_t size); | |
81 | static ssize_t write_unexport(struct file *file, char *buf, size_t size); | |
82 | static ssize_t write_getfd(struct file *file, char *buf, size_t size); | |
83 | static ssize_t write_getfs(struct file *file, char *buf, size_t size); | |
84 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size); | |
85 | static ssize_t write_threads(struct file *file, char *buf, size_t size); | |
eed2965a | 86 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); |
70c3b76c | 87 | static ssize_t write_versions(struct file *file, char *buf, size_t size); |
80212d59 | 88 | static ssize_t write_ports(struct file *file, char *buf, size_t size); |
596bbe53 | 89 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); |
70c3b76c | 90 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 91 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size); |
0964a3d3 | 92 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); |
70c3b76c | 93 | #endif |
1da177e4 | 94 | |
4373ea84 WC |
95 | static ssize_t failover_unlock_ip(struct file *file, char *buf, size_t size); |
96 | ||
1da177e4 LT |
97 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { |
98 | [NFSD_Svc] = write_svc, | |
99 | [NFSD_Add] = write_add, | |
100 | [NFSD_Del] = write_del, | |
101 | [NFSD_Export] = write_export, | |
102 | [NFSD_Unexport] = write_unexport, | |
103 | [NFSD_Getfd] = write_getfd, | |
104 | [NFSD_Getfs] = write_getfs, | |
105 | [NFSD_Fh] = write_filehandle, | |
4373ea84 | 106 | [NFSD_FO_UnlockIP] = failover_unlock_ip, |
1da177e4 | 107 | [NFSD_Threads] = write_threads, |
eed2965a | 108 | [NFSD_Pool_Threads] = write_pool_threads, |
70c3b76c | 109 | [NFSD_Versions] = write_versions, |
80212d59 | 110 | [NFSD_Ports] = write_ports, |
596bbe53 | 111 | [NFSD_MaxBlkSize] = write_maxblksize, |
70c3b76c | 112 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 113 | [NFSD_Leasetime] = write_leasetime, |
0964a3d3 | 114 | [NFSD_RecoveryDir] = write_recoverydir, |
70c3b76c | 115 | #endif |
1da177e4 LT |
116 | }; |
117 | ||
118 | static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
119 | { | |
7eaa36e2 | 120 | ino_t ino = file->f_path.dentry->d_inode->i_ino; |
1da177e4 LT |
121 | char *data; |
122 | ssize_t rv; | |
123 | ||
e8c96f8c | 124 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
1da177e4 LT |
125 | return -EINVAL; |
126 | ||
127 | data = simple_transaction_get(file, buf, size); | |
128 | if (IS_ERR(data)) | |
129 | return PTR_ERR(data); | |
130 | ||
131 | rv = write_op[ino](file, data, size); | |
8971a101 | 132 | if (rv >= 0) { |
1da177e4 LT |
133 | simple_transaction_set(file, rv); |
134 | rv = size; | |
135 | } | |
136 | return rv; | |
137 | } | |
138 | ||
7390022d N |
139 | static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) |
140 | { | |
141 | if (! file->private_data) { | |
142 | /* An attempt to read a transaction file without writing | |
143 | * causes a 0-byte write so that the file can return | |
144 | * state information | |
145 | */ | |
146 | ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); | |
147 | if (rv < 0) | |
148 | return rv; | |
149 | } | |
150 | return simple_transaction_read(file, buf, size, pos); | |
151 | } | |
152 | ||
4b6f5d20 | 153 | static const struct file_operations transaction_ops = { |
1da177e4 | 154 | .write = nfsctl_transaction_write, |
7390022d | 155 | .read = nfsctl_transaction_read, |
1da177e4 LT |
156 | .release = simple_transaction_release, |
157 | }; | |
158 | ||
1da177e4 LT |
159 | static int exports_open(struct inode *inode, struct file *file) |
160 | { | |
161 | return seq_open(file, &nfs_exports_op); | |
162 | } | |
163 | ||
4b6f5d20 | 164 | static const struct file_operations exports_operations = { |
1da177e4 LT |
165 | .open = exports_open, |
166 | .read = seq_read, | |
167 | .llseek = seq_lseek, | |
168 | .release = seq_release, | |
169 | }; | |
170 | ||
171 | /*----------------------------------------------------------------------------*/ | |
172 | /* | |
173 | * payload - write methods | |
174 | * If the method has a response, the response should be put in buf, | |
175 | * and the length returned. Otherwise return 0 or and -error. | |
176 | */ | |
177 | ||
178 | static ssize_t write_svc(struct file *file, char *buf, size_t size) | |
179 | { | |
180 | struct nfsctl_svc *data; | |
181 | if (size < sizeof(*data)) | |
182 | return -EINVAL; | |
183 | data = (struct nfsctl_svc*) buf; | |
184 | return nfsd_svc(data->svc_port, data->svc_nthreads); | |
185 | } | |
186 | ||
187 | static ssize_t write_add(struct file *file, char *buf, size_t size) | |
188 | { | |
189 | struct nfsctl_client *data; | |
190 | if (size < sizeof(*data)) | |
191 | return -EINVAL; | |
192 | data = (struct nfsctl_client *)buf; | |
193 | return exp_addclient(data); | |
194 | } | |
195 | ||
196 | static ssize_t write_del(struct file *file, char *buf, size_t size) | |
197 | { | |
198 | struct nfsctl_client *data; | |
199 | if (size < sizeof(*data)) | |
200 | return -EINVAL; | |
201 | data = (struct nfsctl_client *)buf; | |
202 | return exp_delclient(data); | |
203 | } | |
204 | ||
205 | static ssize_t write_export(struct file *file, char *buf, size_t size) | |
206 | { | |
207 | struct nfsctl_export *data; | |
208 | if (size < sizeof(*data)) | |
209 | return -EINVAL; | |
210 | data = (struct nfsctl_export*)buf; | |
211 | return exp_export(data); | |
212 | } | |
213 | ||
214 | static ssize_t write_unexport(struct file *file, char *buf, size_t size) | |
215 | { | |
216 | struct nfsctl_export *data; | |
217 | ||
218 | if (size < sizeof(*data)) | |
219 | return -EINVAL; | |
220 | data = (struct nfsctl_export*)buf; | |
221 | return exp_unexport(data); | |
222 | } | |
223 | ||
224 | static ssize_t write_getfs(struct file *file, char *buf, size_t size) | |
225 | { | |
226 | struct nfsctl_fsparm *data; | |
227 | struct sockaddr_in *sin; | |
228 | struct auth_domain *clp; | |
229 | int err = 0; | |
230 | struct knfsd_fh *res; | |
f15364bd | 231 | struct in6_addr in6; |
1da177e4 LT |
232 | |
233 | if (size < sizeof(*data)) | |
234 | return -EINVAL; | |
235 | data = (struct nfsctl_fsparm*)buf; | |
236 | err = -EPROTONOSUPPORT; | |
237 | if (data->gd_addr.sa_family != AF_INET) | |
238 | goto out; | |
239 | sin = (struct sockaddr_in *)&data->gd_addr; | |
240 | if (data->gd_maxlen > NFS3_FHSIZE) | |
241 | data->gd_maxlen = NFS3_FHSIZE; | |
242 | ||
243 | res = (struct knfsd_fh*)buf; | |
244 | ||
245 | exp_readlock(); | |
f15364bd AC |
246 | |
247 | ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); | |
248 | ||
249 | clp = auth_unix_lookup(&in6); | |
250 | if (!clp) | |
1da177e4 LT |
251 | err = -EPERM; |
252 | else { | |
253 | err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen); | |
254 | auth_domain_put(clp); | |
255 | } | |
256 | exp_readunlock(); | |
257 | if (err == 0) | |
12127498 | 258 | err = res->fh_size + offsetof(struct knfsd_fh, fh_base); |
1da177e4 LT |
259 | out: |
260 | return err; | |
261 | } | |
262 | ||
263 | static ssize_t write_getfd(struct file *file, char *buf, size_t size) | |
264 | { | |
265 | struct nfsctl_fdparm *data; | |
266 | struct sockaddr_in *sin; | |
267 | struct auth_domain *clp; | |
268 | int err = 0; | |
269 | struct knfsd_fh fh; | |
270 | char *res; | |
f15364bd | 271 | struct in6_addr in6; |
1da177e4 LT |
272 | |
273 | if (size < sizeof(*data)) | |
274 | return -EINVAL; | |
275 | data = (struct nfsctl_fdparm*)buf; | |
276 | err = -EPROTONOSUPPORT; | |
277 | if (data->gd_addr.sa_family != AF_INET) | |
278 | goto out; | |
279 | err = -EINVAL; | |
280 | if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS) | |
281 | goto out; | |
282 | ||
283 | res = buf; | |
284 | sin = (struct sockaddr_in *)&data->gd_addr; | |
285 | exp_readlock(); | |
f15364bd AC |
286 | |
287 | ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); | |
288 | ||
289 | clp = auth_unix_lookup(&in6); | |
290 | if (!clp) | |
1da177e4 LT |
291 | err = -EPERM; |
292 | else { | |
293 | err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE); | |
294 | auth_domain_put(clp); | |
295 | } | |
296 | exp_readunlock(); | |
297 | ||
298 | if (err == 0) { | |
299 | memset(res,0, NFS_FHSIZE); | |
300 | memcpy(res, &fh.fh_base, fh.fh_size); | |
301 | err = NFS_FHSIZE; | |
302 | } | |
303 | out: | |
304 | return err; | |
305 | } | |
306 | ||
4373ea84 WC |
307 | static ssize_t failover_unlock_ip(struct file *file, char *buf, size_t size) |
308 | { | |
309 | __be32 server_ip; | |
310 | char *fo_path, c; | |
311 | int b1, b2, b3, b4; | |
312 | ||
313 | /* sanity check */ | |
314 | if (size == 0) | |
315 | return -EINVAL; | |
316 | ||
317 | if (buf[size-1] != '\n') | |
318 | return -EINVAL; | |
319 | ||
320 | fo_path = buf; | |
321 | if (qword_get(&buf, fo_path, size) < 0) | |
322 | return -EINVAL; | |
323 | ||
324 | /* get ipv4 address */ | |
325 | if (sscanf(fo_path, "%u.%u.%u.%u%c", &b1, &b2, &b3, &b4, &c) != 4) | |
326 | return -EINVAL; | |
327 | server_ip = htonl((((((b1<<8)|b2)<<8)|b3)<<8)|b4); | |
328 | ||
329 | return nlmsvc_unlock_all_by_ip(server_ip); | |
330 | } | |
331 | ||
1da177e4 LT |
332 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size) |
333 | { | |
334 | /* request is: | |
335 | * domain path maxsize | |
336 | * response is | |
337 | * filehandle | |
338 | * | |
339 | * qword quoting is used, so filehandle will be \x.... | |
340 | */ | |
341 | char *dname, *path; | |
246d95ba | 342 | int uninitialized_var(maxsize); |
1da177e4 LT |
343 | char *mesg = buf; |
344 | int len; | |
345 | struct auth_domain *dom; | |
346 | struct knfsd_fh fh; | |
347 | ||
87d26ea7 BF |
348 | if (size == 0) |
349 | return -EINVAL; | |
350 | ||
1da177e4 LT |
351 | if (buf[size-1] != '\n') |
352 | return -EINVAL; | |
353 | buf[size-1] = 0; | |
354 | ||
355 | dname = mesg; | |
356 | len = qword_get(&mesg, dname, size); | |
357 | if (len <= 0) return -EINVAL; | |
358 | ||
359 | path = dname+len+1; | |
360 | len = qword_get(&mesg, path, size); | |
361 | if (len <= 0) return -EINVAL; | |
362 | ||
363 | len = get_int(&mesg, &maxsize); | |
364 | if (len) | |
365 | return len; | |
366 | ||
367 | if (maxsize < NFS_FHSIZE) | |
368 | return -EINVAL; | |
369 | if (maxsize > NFS3_FHSIZE) | |
370 | maxsize = NFS3_FHSIZE; | |
371 | ||
372 | if (qword_get(&mesg, mesg, size)>0) | |
373 | return -EINVAL; | |
374 | ||
375 | /* we have all the words, they are in buf.. */ | |
376 | dom = unix_domain_find(dname); | |
377 | if (!dom) | |
378 | return -ENOMEM; | |
379 | ||
380 | len = exp_rootfh(dom, path, &fh, maxsize); | |
381 | auth_domain_put(dom); | |
382 | if (len) | |
383 | return len; | |
384 | ||
385 | mesg = buf; len = SIMPLE_TRANSACTION_LIMIT; | |
386 | qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); | |
387 | mesg[-1] = '\n'; | |
388 | return mesg - buf; | |
389 | } | |
390 | ||
1da177e4 LT |
391 | static ssize_t write_threads(struct file *file, char *buf, size_t size) |
392 | { | |
393 | /* if size > 0, look for a number of threads and call nfsd_svc | |
394 | * then write out number of threads as reply | |
395 | */ | |
396 | char *mesg = buf; | |
397 | int rv; | |
398 | if (size > 0) { | |
399 | int newthreads; | |
400 | rv = get_int(&mesg, &newthreads); | |
401 | if (rv) | |
402 | return rv; | |
403 | if (newthreads <0) | |
404 | return -EINVAL; | |
405 | rv = nfsd_svc(2049, newthreads); | |
406 | if (rv) | |
407 | return rv; | |
408 | } | |
409 | sprintf(buf, "%d\n", nfsd_nrthreads()); | |
410 | return strlen(buf); | |
411 | } | |
412 | ||
eed2965a GB |
413 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) |
414 | { | |
415 | /* if size > 0, look for an array of number of threads per node | |
416 | * and apply them then write out number of threads per node as reply | |
417 | */ | |
418 | char *mesg = buf; | |
419 | int i; | |
420 | int rv; | |
421 | int len; | |
422 | int npools = nfsd_nrpools(); | |
423 | int *nthreads; | |
424 | ||
425 | if (npools == 0) { | |
426 | /* | |
427 | * NFS is shut down. The admin can start it by | |
428 | * writing to the threads file but NOT the pool_threads | |
429 | * file, sorry. Report zero threads. | |
430 | */ | |
431 | strcpy(buf, "0\n"); | |
432 | return strlen(buf); | |
433 | } | |
434 | ||
435 | nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); | |
436 | if (nthreads == NULL) | |
437 | return -ENOMEM; | |
438 | ||
439 | if (size > 0) { | |
440 | for (i = 0; i < npools; i++) { | |
441 | rv = get_int(&mesg, &nthreads[i]); | |
442 | if (rv == -ENOENT) | |
443 | break; /* fewer numbers than pools */ | |
444 | if (rv) | |
445 | goto out_free; /* syntax error */ | |
446 | rv = -EINVAL; | |
447 | if (nthreads[i] < 0) | |
448 | goto out_free; | |
449 | } | |
450 | rv = nfsd_set_nrthreads(i, nthreads); | |
451 | if (rv) | |
452 | goto out_free; | |
453 | } | |
454 | ||
455 | rv = nfsd_get_nrthreads(npools, nthreads); | |
456 | if (rv) | |
457 | goto out_free; | |
458 | ||
459 | mesg = buf; | |
460 | size = SIMPLE_TRANSACTION_LIMIT; | |
461 | for (i = 0; i < npools && size > 0; i++) { | |
462 | snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); | |
463 | len = strlen(mesg); | |
464 | size -= len; | |
465 | mesg += len; | |
466 | } | |
467 | ||
468 | return (mesg-buf); | |
469 | ||
470 | out_free: | |
471 | kfree(nthreads); | |
472 | return rv; | |
473 | } | |
474 | ||
70c3b76c N |
475 | static ssize_t write_versions(struct file *file, char *buf, size_t size) |
476 | { | |
477 | /* | |
478 | * Format: | |
479 | * [-/+]vers [-/+]vers ... | |
480 | */ | |
481 | char *mesg = buf; | |
482 | char *vers, sign; | |
483 | int len, num; | |
484 | ssize_t tlen = 0; | |
485 | char *sep; | |
486 | ||
487 | if (size>0) { | |
488 | if (nfsd_serv) | |
6658d3a7 N |
489 | /* Cannot change versions without updating |
490 | * nfsd_serv->sv_xdrsize, and reallocing | |
491 | * rq_argp and rq_resp | |
492 | */ | |
70c3b76c N |
493 | return -EBUSY; |
494 | if (buf[size-1] != '\n') | |
495 | return -EINVAL; | |
496 | buf[size-1] = 0; | |
497 | ||
498 | vers = mesg; | |
499 | len = qword_get(&mesg, vers, size); | |
500 | if (len <= 0) return -EINVAL; | |
501 | do { | |
502 | sign = *vers; | |
503 | if (sign == '+' || sign == '-') | |
504 | num = simple_strtol((vers+1), NULL, 0); | |
505 | else | |
506 | num = simple_strtol(vers, NULL, 0); | |
507 | switch(num) { | |
508 | case 2: | |
509 | case 3: | |
510 | case 4: | |
6658d3a7 | 511 | nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); |
70c3b76c N |
512 | break; |
513 | default: | |
514 | return -EINVAL; | |
515 | } | |
516 | vers += len + 1; | |
517 | tlen += len; | |
518 | } while ((len = qword_get(&mesg, vers, size)) > 0); | |
519 | /* If all get turned off, turn them back on, as | |
520 | * having no versions is BAD | |
521 | */ | |
6658d3a7 | 522 | nfsd_reset_versions(); |
70c3b76c N |
523 | } |
524 | /* Now write current state into reply buffer */ | |
525 | len = 0; | |
526 | sep = ""; | |
527 | for (num=2 ; num <= 4 ; num++) | |
6658d3a7 | 528 | if (nfsd_vers(num, NFSD_AVAIL)) { |
70c3b76c | 529 | len += sprintf(buf+len, "%s%c%d", sep, |
6658d3a7 | 530 | nfsd_vers(num, NFSD_TEST)?'+':'-', |
70c3b76c N |
531 | num); |
532 | sep = " "; | |
533 | } | |
534 | len += sprintf(buf+len, "\n"); | |
535 | return len; | |
536 | } | |
537 | ||
80212d59 N |
538 | static ssize_t write_ports(struct file *file, char *buf, size_t size) |
539 | { | |
b41b66d6 N |
540 | if (size == 0) { |
541 | int len = 0; | |
542 | lock_kernel(); | |
543 | if (nfsd_serv) | |
9571af18 | 544 | len = svc_xprt_names(nfsd_serv, buf, 0); |
b41b66d6 N |
545 | unlock_kernel(); |
546 | return len; | |
547 | } | |
548 | /* Either a single 'fd' number is written, in which | |
549 | * case it must be for a socket of a supported family/protocol, | |
550 | * and we use it as an nfsd socket, or | |
551 | * A '-' followed by the 'name' of a socket in which case | |
552 | * we close the socket. | |
80212d59 | 553 | */ |
b41b66d6 N |
554 | if (isdigit(buf[0])) { |
555 | char *mesg = buf; | |
556 | int fd; | |
557 | int err; | |
558 | err = get_int(&mesg, &fd); | |
559 | if (err) | |
560 | return -EINVAL; | |
561 | if (fd < 0) | |
562 | return -EINVAL; | |
563 | err = nfsd_create_serv(); | |
564 | if (!err) { | |
565 | int proto = 0; | |
5680c446 N |
566 | err = svc_addsock(nfsd_serv, fd, buf, &proto); |
567 | if (err >= 0) { | |
568 | err = lockd_up(proto); | |
569 | if (err < 0) | |
570 | svc_sock_names(buf+strlen(buf)+1, nfsd_serv, buf); | |
3dfb4210 | 571 | } |
b41b66d6 N |
572 | /* Decrease the count, but don't shutdown the |
573 | * the service | |
574 | */ | |
cda9e0cd | 575 | lock_kernel(); |
b41b66d6 | 576 | nfsd_serv->sv_nrthreads--; |
cda9e0cd | 577 | unlock_kernel(); |
b41b66d6 | 578 | } |
5680c446 | 579 | return err < 0 ? err : 0; |
b41b66d6 | 580 | } |
a217813f | 581 | if (buf[0] == '-' && isdigit(buf[1])) { |
b41b66d6 N |
582 | char *toclose = kstrdup(buf+1, GFP_KERNEL); |
583 | int len = 0; | |
584 | if (!toclose) | |
585 | return -ENOMEM; | |
586 | lock_kernel(); | |
587 | if (nfsd_serv) | |
588 | len = svc_sock_names(buf, nfsd_serv, toclose); | |
589 | unlock_kernel(); | |
37a03472 N |
590 | if (len >= 0) |
591 | lockd_down(); | |
b41b66d6 N |
592 | kfree(toclose); |
593 | return len; | |
594 | } | |
a217813f TT |
595 | /* |
596 | * Add a transport listener by writing it's transport name | |
597 | */ | |
598 | if (isalpha(buf[0])) { | |
599 | int err; | |
600 | char transport[16]; | |
601 | int port; | |
602 | if (sscanf(buf, "%15s %4d", transport, &port) == 2) { | |
603 | err = nfsd_create_serv(); | |
604 | if (!err) { | |
605 | err = svc_create_xprt(nfsd_serv, | |
606 | transport, port, | |
607 | SVC_SOCK_ANONYMOUS); | |
608 | if (err == -ENOENT) | |
609 | /* Give a reasonable perror msg for | |
610 | * bad transport string */ | |
611 | err = -EPROTONOSUPPORT; | |
612 | } | |
613 | return err < 0 ? err : 0; | |
614 | } | |
615 | } | |
616 | /* | |
617 | * Remove a transport by writing it's transport name and port number | |
618 | */ | |
619 | if (buf[0] == '-' && isalpha(buf[1])) { | |
620 | struct svc_xprt *xprt; | |
621 | int err = -EINVAL; | |
622 | char transport[16]; | |
623 | int port; | |
624 | if (sscanf(&buf[1], "%15s %4d", transport, &port) == 2) { | |
625 | if (port == 0) | |
626 | return -EINVAL; | |
627 | lock_kernel(); | |
628 | if (nfsd_serv) { | |
629 | xprt = svc_find_xprt(nfsd_serv, transport, | |
630 | AF_UNSPEC, port); | |
631 | if (xprt) { | |
632 | svc_close_xprt(xprt); | |
633 | svc_xprt_put(xprt); | |
634 | err = 0; | |
635 | } else | |
636 | err = -ENOTCONN; | |
637 | } | |
638 | unlock_kernel(); | |
639 | return err < 0 ? err : 0; | |
640 | } | |
641 | } | |
b41b66d6 | 642 | return -EINVAL; |
80212d59 N |
643 | } |
644 | ||
596bbe53 N |
645 | int nfsd_max_blksize; |
646 | ||
647 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) | |
648 | { | |
649 | char *mesg = buf; | |
650 | if (size > 0) { | |
651 | int bsize; | |
652 | int rv = get_int(&mesg, &bsize); | |
653 | if (rv) | |
654 | return rv; | |
655 | /* force bsize into allowed range and | |
656 | * required alignment. | |
657 | */ | |
658 | if (bsize < 1024) | |
659 | bsize = 1024; | |
660 | if (bsize > NFSSVC_MAXBLKSIZE) | |
661 | bsize = NFSSVC_MAXBLKSIZE; | |
662 | bsize &= ~(1024-1); | |
663 | lock_kernel(); | |
664 | if (nfsd_serv && nfsd_serv->sv_nrthreads) { | |
665 | unlock_kernel(); | |
666 | return -EBUSY; | |
667 | } | |
668 | nfsd_max_blksize = bsize; | |
669 | unlock_kernel(); | |
670 | } | |
671 | return sprintf(buf, "%d\n", nfsd_max_blksize); | |
672 | } | |
673 | ||
70c3b76c | 674 | #ifdef CONFIG_NFSD_V4 |
1da177e4 LT |
675 | extern time_t nfs4_leasetime(void); |
676 | ||
677 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size) | |
678 | { | |
679 | /* if size > 10 seconds, call | |
680 | * nfs4_reset_lease() then write out the new lease (seconds) as reply | |
681 | */ | |
682 | char *mesg = buf; | |
683 | int rv; | |
684 | ||
685 | if (size > 0) { | |
686 | int lease; | |
687 | rv = get_int(&mesg, &lease); | |
688 | if (rv) | |
689 | return rv; | |
690 | if (lease < 10 || lease > 3600) | |
691 | return -EINVAL; | |
692 | nfs4_reset_lease(lease); | |
693 | } | |
694 | sprintf(buf, "%ld\n", nfs4_lease_time()); | |
695 | return strlen(buf); | |
696 | } | |
697 | ||
0964a3d3 N |
698 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) |
699 | { | |
700 | char *mesg = buf; | |
701 | char *recdir; | |
702 | int len, status; | |
703 | ||
87d26ea7 | 704 | if (size == 0 || size > PATH_MAX || buf[size-1] != '\n') |
0964a3d3 N |
705 | return -EINVAL; |
706 | buf[size-1] = 0; | |
707 | ||
708 | recdir = mesg; | |
709 | len = qword_get(&mesg, recdir, size); | |
710 | if (len <= 0) | |
711 | return -EINVAL; | |
712 | ||
713 | status = nfs4_reset_recoverydir(recdir); | |
714 | return strlen(buf); | |
715 | } | |
70c3b76c | 716 | #endif |
0964a3d3 | 717 | |
1da177e4 LT |
718 | /*----------------------------------------------------------------------------*/ |
719 | /* | |
720 | * populating the filesystem. | |
721 | */ | |
722 | ||
723 | static int nfsd_fill_super(struct super_block * sb, void * data, int silent) | |
724 | { | |
725 | static struct tree_descr nfsd_files[] = { | |
726 | [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR}, | |
727 | [NFSD_Add] = {".add", &transaction_ops, S_IWUSR}, | |
728 | [NFSD_Del] = {".del", &transaction_ops, S_IWUSR}, | |
729 | [NFSD_Export] = {".export", &transaction_ops, S_IWUSR}, | |
730 | [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR}, | |
731 | [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR}, | |
732 | [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR}, | |
733 | [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, | |
4373ea84 WC |
734 | [NFSD_FO_UnlockIP] = {"unlock_ip", |
735 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
1da177e4 LT |
736 | [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, |
737 | [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, | |
eed2965a | 738 | [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, |
70c3b76c | 739 | [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, |
80212d59 | 740 | [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, |
596bbe53 | 741 | [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, |
1da177e4 LT |
742 | #ifdef CONFIG_NFSD_V4 |
743 | [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, | |
0964a3d3 | 744 | [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, |
1da177e4 LT |
745 | #endif |
746 | /* last one */ {""} | |
747 | }; | |
748 | return simple_fill_super(sb, 0x6e667364, nfsd_files); | |
749 | } | |
750 | ||
454e2398 DH |
751 | static int nfsd_get_sb(struct file_system_type *fs_type, |
752 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 753 | { |
454e2398 | 754 | return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt); |
1da177e4 LT |
755 | } |
756 | ||
757 | static struct file_system_type nfsd_fs_type = { | |
758 | .owner = THIS_MODULE, | |
759 | .name = "nfsd", | |
760 | .get_sb = nfsd_get_sb, | |
761 | .kill_sb = kill_litter_super, | |
762 | }; | |
763 | ||
e331f606 BF |
764 | #ifdef CONFIG_PROC_FS |
765 | static int create_proc_exports_entry(void) | |
766 | { | |
767 | struct proc_dir_entry *entry; | |
768 | ||
769 | entry = proc_mkdir("fs/nfs", NULL); | |
770 | if (!entry) | |
771 | return -ENOMEM; | |
772 | entry = create_proc_entry("fs/nfs/exports", 0, NULL); | |
773 | if (!entry) | |
774 | return -ENOMEM; | |
775 | entry->proc_fops = &exports_operations; | |
776 | return 0; | |
777 | } | |
778 | #else /* CONFIG_PROC_FS */ | |
779 | static int create_proc_exports_entry(void) | |
780 | { | |
781 | return 0; | |
782 | } | |
783 | #endif | |
784 | ||
1da177e4 LT |
785 | static int __init init_nfsd(void) |
786 | { | |
787 | int retval; | |
788 | printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); | |
789 | ||
e8ff2a84 BF |
790 | retval = nfs4_state_init(); /* nfs4 locking state */ |
791 | if (retval) | |
792 | return retval; | |
1da177e4 | 793 | nfsd_stat_init(); /* Statistics */ |
d5c3428b BF |
794 | retval = nfsd_reply_cache_init(); |
795 | if (retval) | |
796 | goto out_free_stat; | |
dbf847ec BF |
797 | retval = nfsd_export_init(); |
798 | if (retval) | |
799 | goto out_free_cache; | |
1da177e4 | 800 | nfsd_lockd_init(); /* lockd->nfsd callbacks */ |
dbf847ec BF |
801 | retval = nfsd_idmap_init(); |
802 | if (retval) | |
803 | goto out_free_lockd; | |
e331f606 BF |
804 | retval = create_proc_exports_entry(); |
805 | if (retval) | |
806 | goto out_free_idmap; | |
1da177e4 | 807 | retval = register_filesystem(&nfsd_fs_type); |
26808d3f BF |
808 | if (retval) |
809 | goto out_free_all; | |
810 | return 0; | |
811 | out_free_all: | |
26808d3f BF |
812 | remove_proc_entry("fs/nfs/exports", NULL); |
813 | remove_proc_entry("fs/nfs", NULL); | |
e331f606 | 814 | out_free_idmap: |
dbf847ec BF |
815 | nfsd_idmap_shutdown(); |
816 | out_free_lockd: | |
26808d3f | 817 | nfsd_lockd_shutdown(); |
e331f606 | 818 | nfsd_export_shutdown(); |
dbf847ec | 819 | out_free_cache: |
e331f606 | 820 | nfsd_reply_cache_shutdown(); |
d5c3428b BF |
821 | out_free_stat: |
822 | nfsd_stat_shutdown(); | |
26808d3f | 823 | nfsd4_free_slabs(); |
1da177e4 LT |
824 | return retval; |
825 | } | |
826 | ||
827 | static void __exit exit_nfsd(void) | |
828 | { | |
829 | nfsd_export_shutdown(); | |
d5c3428b | 830 | nfsd_reply_cache_shutdown(); |
1da177e4 LT |
831 | remove_proc_entry("fs/nfs/exports", NULL); |
832 | remove_proc_entry("fs/nfs", NULL); | |
833 | nfsd_stat_shutdown(); | |
834 | nfsd_lockd_shutdown(); | |
1da177e4 | 835 | nfsd_idmap_shutdown(); |
e8ff2a84 | 836 | nfsd4_free_slabs(); |
1da177e4 LT |
837 | unregister_filesystem(&nfsd_fs_type); |
838 | } | |
839 | ||
840 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
841 | MODULE_LICENSE("GPL"); | |
842 | module_init(init_nfsd) | |
843 | module_exit(exit_nfsd) |