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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> | |
3f8206d4 | 15 | #include <linux/namei.h> |
1da177e4 LT |
16 | #include <linux/fcntl.h> |
17 | #include <linux/net.h> | |
18 | #include <linux/in.h> | |
19 | #include <linux/syscalls.h> | |
20 | #include <linux/unistd.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/proc_fs.h> | |
23 | #include <linux/seq_file.h> | |
24 | #include <linux/pagemap.h> | |
25 | #include <linux/init.h> | |
4373ea84 | 26 | #include <linux/inet.h> |
70c3b76c | 27 | #include <linux/string.h> |
80212d59 | 28 | #include <linux/smp_lock.h> |
b41b66d6 | 29 | #include <linux/ctype.h> |
1da177e4 LT |
30 | |
31 | #include <linux/nfs.h> | |
32 | #include <linux/nfsd_idmap.h> | |
b41b66d6 | 33 | #include <linux/lockd/bind.h> |
1da177e4 | 34 | #include <linux/sunrpc/svc.h> |
80212d59 | 35 | #include <linux/sunrpc/svcsock.h> |
1da177e4 LT |
36 | #include <linux/nfsd/nfsd.h> |
37 | #include <linux/nfsd/cache.h> | |
38 | #include <linux/nfsd/xdr.h> | |
39 | #include <linux/nfsd/syscall.h> | |
4373ea84 | 40 | #include <linux/lockd/lockd.h> |
1da177e4 LT |
41 | |
42 | #include <asm/uaccess.h> | |
f15364bd | 43 | #include <net/ipv6.h> |
1da177e4 LT |
44 | |
45 | /* | |
46 | * We have a single directory with 9 nodes in it. | |
47 | */ | |
48 | enum { | |
49 | NFSD_Root = 1, | |
50 | NFSD_Svc, | |
51 | NFSD_Add, | |
52 | NFSD_Del, | |
53 | NFSD_Export, | |
54 | NFSD_Unexport, | |
55 | NFSD_Getfd, | |
56 | NFSD_Getfs, | |
57 | NFSD_List, | |
58 | NFSD_Fh, | |
4373ea84 | 59 | NFSD_FO_UnlockIP, |
17efa372 | 60 | NFSD_FO_UnlockFS, |
1da177e4 | 61 | NFSD_Threads, |
eed2965a | 62 | NFSD_Pool_Threads, |
70c3b76c | 63 | NFSD_Versions, |
80212d59 | 64 | NFSD_Ports, |
596bbe53 | 65 | NFSD_MaxBlkSize, |
70c3b76c N |
66 | /* |
67 | * The below MUST come last. Otherwise we leave a hole in nfsd_files[] | |
68 | * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops | |
69 | */ | |
70 | #ifdef CONFIG_NFSD_V4 | |
1da177e4 | 71 | NFSD_Leasetime, |
0964a3d3 | 72 | NFSD_RecoveryDir, |
70c3b76c | 73 | #endif |
1da177e4 LT |
74 | }; |
75 | ||
76 | /* | |
77 | * write() for these nodes. | |
78 | */ | |
79 | static ssize_t write_svc(struct file *file, char *buf, size_t size); | |
80 | static ssize_t write_add(struct file *file, char *buf, size_t size); | |
81 | static ssize_t write_del(struct file *file, char *buf, size_t size); | |
82 | static ssize_t write_export(struct file *file, char *buf, size_t size); | |
83 | static ssize_t write_unexport(struct file *file, char *buf, size_t size); | |
84 | static ssize_t write_getfd(struct file *file, char *buf, size_t size); | |
85 | static ssize_t write_getfs(struct file *file, char *buf, size_t size); | |
86 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size); | |
b046ccdc CL |
87 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); |
88 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); | |
1da177e4 | 89 | static ssize_t write_threads(struct file *file, char *buf, size_t size); |
eed2965a | 90 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); |
70c3b76c | 91 | static ssize_t write_versions(struct file *file, char *buf, size_t size); |
80212d59 | 92 | static ssize_t write_ports(struct file *file, char *buf, size_t size); |
596bbe53 | 93 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); |
70c3b76c | 94 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 95 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size); |
0964a3d3 | 96 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); |
70c3b76c | 97 | #endif |
1da177e4 LT |
98 | |
99 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { | |
100 | [NFSD_Svc] = write_svc, | |
101 | [NFSD_Add] = write_add, | |
102 | [NFSD_Del] = write_del, | |
103 | [NFSD_Export] = write_export, | |
104 | [NFSD_Unexport] = write_unexport, | |
105 | [NFSD_Getfd] = write_getfd, | |
106 | [NFSD_Getfs] = write_getfs, | |
107 | [NFSD_Fh] = write_filehandle, | |
b046ccdc CL |
108 | [NFSD_FO_UnlockIP] = write_unlock_ip, |
109 | [NFSD_FO_UnlockFS] = write_unlock_fs, | |
1da177e4 | 110 | [NFSD_Threads] = write_threads, |
eed2965a | 111 | [NFSD_Pool_Threads] = write_pool_threads, |
70c3b76c | 112 | [NFSD_Versions] = write_versions, |
80212d59 | 113 | [NFSD_Ports] = write_ports, |
596bbe53 | 114 | [NFSD_MaxBlkSize] = write_maxblksize, |
70c3b76c | 115 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 116 | [NFSD_Leasetime] = write_leasetime, |
0964a3d3 | 117 | [NFSD_RecoveryDir] = write_recoverydir, |
70c3b76c | 118 | #endif |
1da177e4 LT |
119 | }; |
120 | ||
121 | static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
122 | { | |
7eaa36e2 | 123 | ino_t ino = file->f_path.dentry->d_inode->i_ino; |
1da177e4 LT |
124 | char *data; |
125 | ssize_t rv; | |
126 | ||
e8c96f8c | 127 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
1da177e4 LT |
128 | return -EINVAL; |
129 | ||
130 | data = simple_transaction_get(file, buf, size); | |
131 | if (IS_ERR(data)) | |
132 | return PTR_ERR(data); | |
133 | ||
134 | rv = write_op[ino](file, data, size); | |
8971a101 | 135 | if (rv >= 0) { |
1da177e4 LT |
136 | simple_transaction_set(file, rv); |
137 | rv = size; | |
138 | } | |
139 | return rv; | |
140 | } | |
141 | ||
7390022d N |
142 | static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) |
143 | { | |
144 | if (! file->private_data) { | |
145 | /* An attempt to read a transaction file without writing | |
146 | * causes a 0-byte write so that the file can return | |
147 | * state information | |
148 | */ | |
149 | ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); | |
150 | if (rv < 0) | |
151 | return rv; | |
152 | } | |
153 | return simple_transaction_read(file, buf, size, pos); | |
154 | } | |
155 | ||
4b6f5d20 | 156 | static const struct file_operations transaction_ops = { |
1da177e4 | 157 | .write = nfsctl_transaction_write, |
7390022d | 158 | .read = nfsctl_transaction_read, |
1da177e4 LT |
159 | .release = simple_transaction_release, |
160 | }; | |
161 | ||
1da177e4 LT |
162 | static int exports_open(struct inode *inode, struct file *file) |
163 | { | |
164 | return seq_open(file, &nfs_exports_op); | |
165 | } | |
166 | ||
4b6f5d20 | 167 | static const struct file_operations exports_operations = { |
1da177e4 LT |
168 | .open = exports_open, |
169 | .read = seq_read, | |
170 | .llseek = seq_lseek, | |
171 | .release = seq_release, | |
9ef2db26 | 172 | .owner = THIS_MODULE, |
1da177e4 LT |
173 | }; |
174 | ||
175 | /*----------------------------------------------------------------------------*/ | |
176 | /* | |
177 | * payload - write methods | |
178 | * If the method has a response, the response should be put in buf, | |
179 | * and the length returned. Otherwise return 0 or and -error. | |
180 | */ | |
181 | ||
182 | static ssize_t write_svc(struct file *file, char *buf, size_t size) | |
183 | { | |
184 | struct nfsctl_svc *data; | |
185 | if (size < sizeof(*data)) | |
186 | return -EINVAL; | |
187 | data = (struct nfsctl_svc*) buf; | |
188 | return nfsd_svc(data->svc_port, data->svc_nthreads); | |
189 | } | |
190 | ||
191 | static ssize_t write_add(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_addclient(data); | |
198 | } | |
199 | ||
200 | static ssize_t write_del(struct file *file, char *buf, size_t size) | |
201 | { | |
202 | struct nfsctl_client *data; | |
203 | if (size < sizeof(*data)) | |
204 | return -EINVAL; | |
205 | data = (struct nfsctl_client *)buf; | |
206 | return exp_delclient(data); | |
207 | } | |
208 | ||
209 | static ssize_t write_export(struct file *file, char *buf, size_t size) | |
210 | { | |
211 | struct nfsctl_export *data; | |
212 | if (size < sizeof(*data)) | |
213 | return -EINVAL; | |
214 | data = (struct nfsctl_export*)buf; | |
215 | return exp_export(data); | |
216 | } | |
217 | ||
218 | static ssize_t write_unexport(struct file *file, char *buf, size_t size) | |
219 | { | |
220 | struct nfsctl_export *data; | |
221 | ||
222 | if (size < sizeof(*data)) | |
223 | return -EINVAL; | |
224 | data = (struct nfsctl_export*)buf; | |
225 | return exp_unexport(data); | |
226 | } | |
227 | ||
228 | static ssize_t write_getfs(struct file *file, char *buf, size_t size) | |
229 | { | |
230 | struct nfsctl_fsparm *data; | |
231 | struct sockaddr_in *sin; | |
232 | struct auth_domain *clp; | |
233 | int err = 0; | |
234 | struct knfsd_fh *res; | |
f15364bd | 235 | struct in6_addr in6; |
1da177e4 LT |
236 | |
237 | if (size < sizeof(*data)) | |
238 | return -EINVAL; | |
239 | data = (struct nfsctl_fsparm*)buf; | |
240 | err = -EPROTONOSUPPORT; | |
241 | if (data->gd_addr.sa_family != AF_INET) | |
242 | goto out; | |
243 | sin = (struct sockaddr_in *)&data->gd_addr; | |
244 | if (data->gd_maxlen > NFS3_FHSIZE) | |
245 | data->gd_maxlen = NFS3_FHSIZE; | |
246 | ||
247 | res = (struct knfsd_fh*)buf; | |
248 | ||
249 | exp_readlock(); | |
f15364bd AC |
250 | |
251 | ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); | |
252 | ||
253 | clp = auth_unix_lookup(&in6); | |
254 | if (!clp) | |
1da177e4 LT |
255 | err = -EPERM; |
256 | else { | |
257 | err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen); | |
258 | auth_domain_put(clp); | |
259 | } | |
260 | exp_readunlock(); | |
261 | if (err == 0) | |
12127498 | 262 | err = res->fh_size + offsetof(struct knfsd_fh, fh_base); |
1da177e4 LT |
263 | out: |
264 | return err; | |
265 | } | |
266 | ||
267 | static ssize_t write_getfd(struct file *file, char *buf, size_t size) | |
268 | { | |
269 | struct nfsctl_fdparm *data; | |
270 | struct sockaddr_in *sin; | |
271 | struct auth_domain *clp; | |
272 | int err = 0; | |
273 | struct knfsd_fh fh; | |
274 | char *res; | |
f15364bd | 275 | struct in6_addr in6; |
1da177e4 LT |
276 | |
277 | if (size < sizeof(*data)) | |
278 | return -EINVAL; | |
279 | data = (struct nfsctl_fdparm*)buf; | |
280 | err = -EPROTONOSUPPORT; | |
281 | if (data->gd_addr.sa_family != AF_INET) | |
282 | goto out; | |
283 | err = -EINVAL; | |
284 | if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS) | |
285 | goto out; | |
286 | ||
287 | res = buf; | |
288 | sin = (struct sockaddr_in *)&data->gd_addr; | |
289 | exp_readlock(); | |
f15364bd AC |
290 | |
291 | ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); | |
292 | ||
293 | clp = auth_unix_lookup(&in6); | |
294 | if (!clp) | |
1da177e4 LT |
295 | err = -EPERM; |
296 | else { | |
297 | err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE); | |
298 | auth_domain_put(clp); | |
299 | } | |
300 | exp_readunlock(); | |
301 | ||
302 | if (err == 0) { | |
303 | memset(res,0, NFS_FHSIZE); | |
304 | memcpy(res, &fh.fh_base, fh.fh_size); | |
305 | err = NFS_FHSIZE; | |
306 | } | |
307 | out: | |
308 | return err; | |
309 | } | |
310 | ||
b046ccdc | 311 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) |
4373ea84 | 312 | { |
367c8c7b CL |
313 | struct sockaddr_in sin = { |
314 | .sin_family = AF_INET, | |
315 | }; | |
4373ea84 | 316 | int b1, b2, b3, b4; |
367c8c7b CL |
317 | char c; |
318 | char *fo_path; | |
4373ea84 WC |
319 | |
320 | /* sanity check */ | |
321 | if (size == 0) | |
322 | return -EINVAL; | |
323 | ||
324 | if (buf[size-1] != '\n') | |
325 | return -EINVAL; | |
326 | ||
327 | fo_path = buf; | |
328 | if (qword_get(&buf, fo_path, size) < 0) | |
329 | return -EINVAL; | |
330 | ||
331 | /* get ipv4 address */ | |
be859405 | 332 | if (sscanf(fo_path, "%u.%u.%u.%u%c", &b1, &b2, &b3, &b4, &c) != 4) |
367c8c7b CL |
333 | return -EINVAL; |
334 | if (b1 > 255 || b2 > 255 || b3 > 255 || b4 > 255) | |
4373ea84 | 335 | return -EINVAL; |
367c8c7b | 336 | sin.sin_addr.s_addr = htonl((b1 << 24) | (b2 << 16) | (b3 << 8) | b4); |
4373ea84 | 337 | |
367c8c7b | 338 | return nlmsvc_unlock_all_by_ip((struct sockaddr *)&sin); |
4373ea84 WC |
339 | } |
340 | ||
b046ccdc | 341 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) |
17efa372 | 342 | { |
a63bb996 | 343 | struct path path; |
17efa372 WC |
344 | char *fo_path; |
345 | int error; | |
346 | ||
347 | /* sanity check */ | |
348 | if (size == 0) | |
349 | return -EINVAL; | |
350 | ||
351 | if (buf[size-1] != '\n') | |
352 | return -EINVAL; | |
353 | ||
354 | fo_path = buf; | |
355 | if (qword_get(&buf, fo_path, size) < 0) | |
356 | return -EINVAL; | |
357 | ||
a63bb996 | 358 | error = kern_path(fo_path, 0, &path); |
17efa372 WC |
359 | if (error) |
360 | return error; | |
361 | ||
a63bb996 | 362 | error = nlmsvc_unlock_all_by_sb(path.mnt->mnt_sb); |
17efa372 | 363 | |
a63bb996 | 364 | path_put(&path); |
17efa372 WC |
365 | return error; |
366 | } | |
367 | ||
1da177e4 LT |
368 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size) |
369 | { | |
370 | /* request is: | |
371 | * domain path maxsize | |
372 | * response is | |
373 | * filehandle | |
374 | * | |
375 | * qword quoting is used, so filehandle will be \x.... | |
376 | */ | |
377 | char *dname, *path; | |
246d95ba | 378 | int uninitialized_var(maxsize); |
1da177e4 LT |
379 | char *mesg = buf; |
380 | int len; | |
381 | struct auth_domain *dom; | |
382 | struct knfsd_fh fh; | |
383 | ||
87d26ea7 BF |
384 | if (size == 0) |
385 | return -EINVAL; | |
386 | ||
1da177e4 LT |
387 | if (buf[size-1] != '\n') |
388 | return -EINVAL; | |
389 | buf[size-1] = 0; | |
390 | ||
391 | dname = mesg; | |
392 | len = qword_get(&mesg, dname, size); | |
393 | if (len <= 0) return -EINVAL; | |
394 | ||
395 | path = dname+len+1; | |
396 | len = qword_get(&mesg, path, size); | |
397 | if (len <= 0) return -EINVAL; | |
398 | ||
399 | len = get_int(&mesg, &maxsize); | |
400 | if (len) | |
401 | return len; | |
402 | ||
403 | if (maxsize < NFS_FHSIZE) | |
404 | return -EINVAL; | |
405 | if (maxsize > NFS3_FHSIZE) | |
406 | maxsize = NFS3_FHSIZE; | |
407 | ||
408 | if (qword_get(&mesg, mesg, size)>0) | |
409 | return -EINVAL; | |
410 | ||
411 | /* we have all the words, they are in buf.. */ | |
412 | dom = unix_domain_find(dname); | |
413 | if (!dom) | |
414 | return -ENOMEM; | |
415 | ||
416 | len = exp_rootfh(dom, path, &fh, maxsize); | |
417 | auth_domain_put(dom); | |
418 | if (len) | |
419 | return len; | |
420 | ||
421 | mesg = buf; len = SIMPLE_TRANSACTION_LIMIT; | |
422 | qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); | |
423 | mesg[-1] = '\n'; | |
424 | return mesg - buf; | |
425 | } | |
426 | ||
1da177e4 LT |
427 | static ssize_t write_threads(struct file *file, char *buf, size_t size) |
428 | { | |
429 | /* if size > 0, look for a number of threads and call nfsd_svc | |
430 | * then write out number of threads as reply | |
431 | */ | |
432 | char *mesg = buf; | |
433 | int rv; | |
434 | if (size > 0) { | |
435 | int newthreads; | |
436 | rv = get_int(&mesg, &newthreads); | |
437 | if (rv) | |
438 | return rv; | |
439 | if (newthreads <0) | |
440 | return -EINVAL; | |
441 | rv = nfsd_svc(2049, newthreads); | |
442 | if (rv) | |
443 | return rv; | |
444 | } | |
445 | sprintf(buf, "%d\n", nfsd_nrthreads()); | |
446 | return strlen(buf); | |
447 | } | |
448 | ||
eed2965a GB |
449 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) |
450 | { | |
451 | /* if size > 0, look for an array of number of threads per node | |
452 | * and apply them then write out number of threads per node as reply | |
453 | */ | |
454 | char *mesg = buf; | |
455 | int i; | |
456 | int rv; | |
457 | int len; | |
bedbdd8b | 458 | int npools; |
eed2965a GB |
459 | int *nthreads; |
460 | ||
bedbdd8b NB |
461 | mutex_lock(&nfsd_mutex); |
462 | npools = nfsd_nrpools(); | |
eed2965a GB |
463 | if (npools == 0) { |
464 | /* | |
465 | * NFS is shut down. The admin can start it by | |
466 | * writing to the threads file but NOT the pool_threads | |
467 | * file, sorry. Report zero threads. | |
468 | */ | |
bedbdd8b | 469 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
470 | strcpy(buf, "0\n"); |
471 | return strlen(buf); | |
472 | } | |
473 | ||
474 | nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); | |
bedbdd8b | 475 | rv = -ENOMEM; |
eed2965a | 476 | if (nthreads == NULL) |
bedbdd8b | 477 | goto out_free; |
eed2965a GB |
478 | |
479 | if (size > 0) { | |
480 | for (i = 0; i < npools; i++) { | |
481 | rv = get_int(&mesg, &nthreads[i]); | |
482 | if (rv == -ENOENT) | |
483 | break; /* fewer numbers than pools */ | |
484 | if (rv) | |
485 | goto out_free; /* syntax error */ | |
486 | rv = -EINVAL; | |
487 | if (nthreads[i] < 0) | |
488 | goto out_free; | |
489 | } | |
490 | rv = nfsd_set_nrthreads(i, nthreads); | |
491 | if (rv) | |
492 | goto out_free; | |
493 | } | |
494 | ||
495 | rv = nfsd_get_nrthreads(npools, nthreads); | |
496 | if (rv) | |
497 | goto out_free; | |
498 | ||
499 | mesg = buf; | |
500 | size = SIMPLE_TRANSACTION_LIMIT; | |
501 | for (i = 0; i < npools && size > 0; i++) { | |
502 | snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); | |
503 | len = strlen(mesg); | |
504 | size -= len; | |
505 | mesg += len; | |
506 | } | |
507 | ||
bedbdd8b | 508 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
509 | return (mesg-buf); |
510 | ||
511 | out_free: | |
512 | kfree(nthreads); | |
bedbdd8b | 513 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
514 | return rv; |
515 | } | |
516 | ||
3dd98a3b | 517 | static ssize_t __write_versions(struct file *file, char *buf, size_t size) |
70c3b76c N |
518 | { |
519 | /* | |
520 | * Format: | |
521 | * [-/+]vers [-/+]vers ... | |
522 | */ | |
523 | char *mesg = buf; | |
524 | char *vers, sign; | |
525 | int len, num; | |
526 | ssize_t tlen = 0; | |
527 | char *sep; | |
528 | ||
529 | if (size>0) { | |
530 | if (nfsd_serv) | |
6658d3a7 N |
531 | /* Cannot change versions without updating |
532 | * nfsd_serv->sv_xdrsize, and reallocing | |
533 | * rq_argp and rq_resp | |
534 | */ | |
70c3b76c N |
535 | return -EBUSY; |
536 | if (buf[size-1] != '\n') | |
537 | return -EINVAL; | |
538 | buf[size-1] = 0; | |
539 | ||
540 | vers = mesg; | |
541 | len = qword_get(&mesg, vers, size); | |
542 | if (len <= 0) return -EINVAL; | |
543 | do { | |
544 | sign = *vers; | |
545 | if (sign == '+' || sign == '-') | |
546 | num = simple_strtol((vers+1), NULL, 0); | |
547 | else | |
548 | num = simple_strtol(vers, NULL, 0); | |
549 | switch(num) { | |
550 | case 2: | |
551 | case 3: | |
552 | case 4: | |
6658d3a7 | 553 | nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); |
70c3b76c N |
554 | break; |
555 | default: | |
556 | return -EINVAL; | |
557 | } | |
558 | vers += len + 1; | |
559 | tlen += len; | |
560 | } while ((len = qword_get(&mesg, vers, size)) > 0); | |
561 | /* If all get turned off, turn them back on, as | |
562 | * having no versions is BAD | |
563 | */ | |
6658d3a7 | 564 | nfsd_reset_versions(); |
70c3b76c N |
565 | } |
566 | /* Now write current state into reply buffer */ | |
567 | len = 0; | |
568 | sep = ""; | |
569 | for (num=2 ; num <= 4 ; num++) | |
6658d3a7 | 570 | if (nfsd_vers(num, NFSD_AVAIL)) { |
70c3b76c | 571 | len += sprintf(buf+len, "%s%c%d", sep, |
6658d3a7 | 572 | nfsd_vers(num, NFSD_TEST)?'+':'-', |
70c3b76c N |
573 | num); |
574 | sep = " "; | |
575 | } | |
576 | len += sprintf(buf+len, "\n"); | |
577 | return len; | |
578 | } | |
579 | ||
3dd98a3b JL |
580 | static ssize_t write_versions(struct file *file, char *buf, size_t size) |
581 | { | |
582 | ssize_t rv; | |
583 | ||
584 | mutex_lock(&nfsd_mutex); | |
585 | rv = __write_versions(file, buf, size); | |
586 | mutex_unlock(&nfsd_mutex); | |
587 | return rv; | |
588 | } | |
589 | ||
bedbdd8b | 590 | static ssize_t __write_ports(struct file *file, char *buf, size_t size) |
80212d59 | 591 | { |
b41b66d6 N |
592 | if (size == 0) { |
593 | int len = 0; | |
bedbdd8b | 594 | |
b41b66d6 | 595 | if (nfsd_serv) |
9571af18 | 596 | len = svc_xprt_names(nfsd_serv, buf, 0); |
b41b66d6 N |
597 | return len; |
598 | } | |
599 | /* Either a single 'fd' number is written, in which | |
600 | * case it must be for a socket of a supported family/protocol, | |
601 | * and we use it as an nfsd socket, or | |
602 | * A '-' followed by the 'name' of a socket in which case | |
603 | * we close the socket. | |
80212d59 | 604 | */ |
b41b66d6 N |
605 | if (isdigit(buf[0])) { |
606 | char *mesg = buf; | |
607 | int fd; | |
608 | int err; | |
609 | err = get_int(&mesg, &fd); | |
610 | if (err) | |
611 | return -EINVAL; | |
612 | if (fd < 0) | |
613 | return -EINVAL; | |
614 | err = nfsd_create_serv(); | |
615 | if (!err) { | |
29373913 | 616 | err = svc_addsock(nfsd_serv, fd, buf); |
5680c446 | 617 | if (err >= 0) { |
26a41409 | 618 | err = lockd_up(); |
5680c446 N |
619 | if (err < 0) |
620 | svc_sock_names(buf+strlen(buf)+1, nfsd_serv, buf); | |
3dfb4210 | 621 | } |
b41b66d6 N |
622 | /* Decrease the count, but don't shutdown the |
623 | * the service | |
624 | */ | |
b41b66d6 N |
625 | nfsd_serv->sv_nrthreads--; |
626 | } | |
5680c446 | 627 | return err < 0 ? err : 0; |
b41b66d6 | 628 | } |
a217813f | 629 | if (buf[0] == '-' && isdigit(buf[1])) { |
b41b66d6 N |
630 | char *toclose = kstrdup(buf+1, GFP_KERNEL); |
631 | int len = 0; | |
632 | if (!toclose) | |
633 | return -ENOMEM; | |
b41b66d6 N |
634 | if (nfsd_serv) |
635 | len = svc_sock_names(buf, nfsd_serv, toclose); | |
37a03472 N |
636 | if (len >= 0) |
637 | lockd_down(); | |
b41b66d6 N |
638 | kfree(toclose); |
639 | return len; | |
640 | } | |
a217813f TT |
641 | /* |
642 | * Add a transport listener by writing it's transport name | |
643 | */ | |
644 | if (isalpha(buf[0])) { | |
645 | int err; | |
646 | char transport[16]; | |
647 | int port; | |
648 | if (sscanf(buf, "%15s %4d", transport, &port) == 2) { | |
649 | err = nfsd_create_serv(); | |
650 | if (!err) { | |
651 | err = svc_create_xprt(nfsd_serv, | |
652 | transport, port, | |
653 | SVC_SOCK_ANONYMOUS); | |
654 | if (err == -ENOENT) | |
655 | /* Give a reasonable perror msg for | |
656 | * bad transport string */ | |
657 | err = -EPROTONOSUPPORT; | |
658 | } | |
659 | return err < 0 ? err : 0; | |
660 | } | |
661 | } | |
662 | /* | |
663 | * Remove a transport by writing it's transport name and port number | |
664 | */ | |
665 | if (buf[0] == '-' && isalpha(buf[1])) { | |
666 | struct svc_xprt *xprt; | |
667 | int err = -EINVAL; | |
668 | char transport[16]; | |
669 | int port; | |
670 | if (sscanf(&buf[1], "%15s %4d", transport, &port) == 2) { | |
671 | if (port == 0) | |
672 | return -EINVAL; | |
a217813f TT |
673 | if (nfsd_serv) { |
674 | xprt = svc_find_xprt(nfsd_serv, transport, | |
675 | AF_UNSPEC, port); | |
676 | if (xprt) { | |
677 | svc_close_xprt(xprt); | |
678 | svc_xprt_put(xprt); | |
679 | err = 0; | |
680 | } else | |
681 | err = -ENOTCONN; | |
682 | } | |
a217813f TT |
683 | return err < 0 ? err : 0; |
684 | } | |
685 | } | |
b41b66d6 | 686 | return -EINVAL; |
80212d59 N |
687 | } |
688 | ||
bedbdd8b NB |
689 | static ssize_t write_ports(struct file *file, char *buf, size_t size) |
690 | { | |
691 | ssize_t rv; | |
3dd98a3b | 692 | |
bedbdd8b NB |
693 | mutex_lock(&nfsd_mutex); |
694 | rv = __write_ports(file, buf, size); | |
695 | mutex_unlock(&nfsd_mutex); | |
696 | return rv; | |
697 | } | |
698 | ||
699 | ||
596bbe53 N |
700 | int nfsd_max_blksize; |
701 | ||
702 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) | |
703 | { | |
704 | char *mesg = buf; | |
705 | if (size > 0) { | |
706 | int bsize; | |
707 | int rv = get_int(&mesg, &bsize); | |
708 | if (rv) | |
709 | return rv; | |
710 | /* force bsize into allowed range and | |
711 | * required alignment. | |
712 | */ | |
713 | if (bsize < 1024) | |
714 | bsize = 1024; | |
715 | if (bsize > NFSSVC_MAXBLKSIZE) | |
716 | bsize = NFSSVC_MAXBLKSIZE; | |
717 | bsize &= ~(1024-1); | |
bedbdd8b | 718 | mutex_lock(&nfsd_mutex); |
596bbe53 | 719 | if (nfsd_serv && nfsd_serv->sv_nrthreads) { |
bedbdd8b | 720 | mutex_unlock(&nfsd_mutex); |
596bbe53 N |
721 | return -EBUSY; |
722 | } | |
723 | nfsd_max_blksize = bsize; | |
bedbdd8b | 724 | mutex_unlock(&nfsd_mutex); |
596bbe53 N |
725 | } |
726 | return sprintf(buf, "%d\n", nfsd_max_blksize); | |
727 | } | |
728 | ||
70c3b76c | 729 | #ifdef CONFIG_NFSD_V4 |
1da177e4 LT |
730 | extern time_t nfs4_leasetime(void); |
731 | ||
3dd98a3b | 732 | static ssize_t __write_leasetime(struct file *file, char *buf, size_t size) |
1da177e4 LT |
733 | { |
734 | /* if size > 10 seconds, call | |
735 | * nfs4_reset_lease() then write out the new lease (seconds) as reply | |
736 | */ | |
737 | char *mesg = buf; | |
3dd98a3b | 738 | int rv, lease; |
1da177e4 LT |
739 | |
740 | if (size > 0) { | |
3dd98a3b JL |
741 | if (nfsd_serv) |
742 | return -EBUSY; | |
1da177e4 LT |
743 | rv = get_int(&mesg, &lease); |
744 | if (rv) | |
745 | return rv; | |
746 | if (lease < 10 || lease > 3600) | |
747 | return -EINVAL; | |
748 | nfs4_reset_lease(lease); | |
749 | } | |
750 | sprintf(buf, "%ld\n", nfs4_lease_time()); | |
751 | return strlen(buf); | |
752 | } | |
753 | ||
3dd98a3b JL |
754 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size) |
755 | { | |
756 | ssize_t rv; | |
757 | ||
758 | mutex_lock(&nfsd_mutex); | |
759 | rv = __write_leasetime(file, buf, size); | |
760 | mutex_unlock(&nfsd_mutex); | |
761 | return rv; | |
762 | } | |
763 | ||
764 | extern char *nfs4_recoverydir(void); | |
765 | ||
766 | static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size) | |
0964a3d3 N |
767 | { |
768 | char *mesg = buf; | |
769 | char *recdir; | |
770 | int len, status; | |
771 | ||
3dd98a3b JL |
772 | if (size > 0) { |
773 | if (nfsd_serv) | |
774 | return -EBUSY; | |
775 | if (size > PATH_MAX || buf[size-1] != '\n') | |
776 | return -EINVAL; | |
777 | buf[size-1] = 0; | |
0964a3d3 | 778 | |
3dd98a3b JL |
779 | recdir = mesg; |
780 | len = qword_get(&mesg, recdir, size); | |
781 | if (len <= 0) | |
782 | return -EINVAL; | |
0964a3d3 | 783 | |
3dd98a3b JL |
784 | status = nfs4_reset_recoverydir(recdir); |
785 | } | |
786 | sprintf(buf, "%s\n", nfs4_recoverydir()); | |
0964a3d3 N |
787 | return strlen(buf); |
788 | } | |
3dd98a3b JL |
789 | |
790 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) | |
791 | { | |
792 | ssize_t rv; | |
793 | ||
794 | mutex_lock(&nfsd_mutex); | |
795 | rv = __write_recoverydir(file, buf, size); | |
796 | mutex_unlock(&nfsd_mutex); | |
797 | return rv; | |
798 | } | |
799 | ||
70c3b76c | 800 | #endif |
0964a3d3 | 801 | |
1da177e4 LT |
802 | /*----------------------------------------------------------------------------*/ |
803 | /* | |
804 | * populating the filesystem. | |
805 | */ | |
806 | ||
807 | static int nfsd_fill_super(struct super_block * sb, void * data, int silent) | |
808 | { | |
809 | static struct tree_descr nfsd_files[] = { | |
810 | [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR}, | |
811 | [NFSD_Add] = {".add", &transaction_ops, S_IWUSR}, | |
812 | [NFSD_Del] = {".del", &transaction_ops, S_IWUSR}, | |
813 | [NFSD_Export] = {".export", &transaction_ops, S_IWUSR}, | |
814 | [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR}, | |
815 | [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR}, | |
816 | [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR}, | |
817 | [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, | |
4373ea84 WC |
818 | [NFSD_FO_UnlockIP] = {"unlock_ip", |
819 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
17efa372 WC |
820 | [NFSD_FO_UnlockFS] = {"unlock_filesystem", |
821 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
1da177e4 LT |
822 | [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, |
823 | [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, | |
eed2965a | 824 | [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, |
70c3b76c | 825 | [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, |
80212d59 | 826 | [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, |
596bbe53 | 827 | [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, |
1da177e4 LT |
828 | #ifdef CONFIG_NFSD_V4 |
829 | [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, | |
0964a3d3 | 830 | [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, |
1da177e4 LT |
831 | #endif |
832 | /* last one */ {""} | |
833 | }; | |
834 | return simple_fill_super(sb, 0x6e667364, nfsd_files); | |
835 | } | |
836 | ||
454e2398 DH |
837 | static int nfsd_get_sb(struct file_system_type *fs_type, |
838 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 839 | { |
454e2398 | 840 | return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt); |
1da177e4 LT |
841 | } |
842 | ||
843 | static struct file_system_type nfsd_fs_type = { | |
844 | .owner = THIS_MODULE, | |
845 | .name = "nfsd", | |
846 | .get_sb = nfsd_get_sb, | |
847 | .kill_sb = kill_litter_super, | |
848 | }; | |
849 | ||
e331f606 BF |
850 | #ifdef CONFIG_PROC_FS |
851 | static int create_proc_exports_entry(void) | |
852 | { | |
853 | struct proc_dir_entry *entry; | |
854 | ||
855 | entry = proc_mkdir("fs/nfs", NULL); | |
856 | if (!entry) | |
857 | return -ENOMEM; | |
9ef2db26 | 858 | entry = proc_create("exports", 0, entry, &exports_operations); |
e331f606 BF |
859 | if (!entry) |
860 | return -ENOMEM; | |
e331f606 BF |
861 | return 0; |
862 | } | |
863 | #else /* CONFIG_PROC_FS */ | |
864 | static int create_proc_exports_entry(void) | |
865 | { | |
866 | return 0; | |
867 | } | |
868 | #endif | |
869 | ||
1da177e4 LT |
870 | static int __init init_nfsd(void) |
871 | { | |
872 | int retval; | |
873 | printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); | |
874 | ||
e8ff2a84 BF |
875 | retval = nfs4_state_init(); /* nfs4 locking state */ |
876 | if (retval) | |
877 | return retval; | |
1da177e4 | 878 | nfsd_stat_init(); /* Statistics */ |
d5c3428b BF |
879 | retval = nfsd_reply_cache_init(); |
880 | if (retval) | |
881 | goto out_free_stat; | |
dbf847ec BF |
882 | retval = nfsd_export_init(); |
883 | if (retval) | |
884 | goto out_free_cache; | |
1da177e4 | 885 | nfsd_lockd_init(); /* lockd->nfsd callbacks */ |
dbf847ec BF |
886 | retval = nfsd_idmap_init(); |
887 | if (retval) | |
888 | goto out_free_lockd; | |
e331f606 BF |
889 | retval = create_proc_exports_entry(); |
890 | if (retval) | |
891 | goto out_free_idmap; | |
1da177e4 | 892 | retval = register_filesystem(&nfsd_fs_type); |
26808d3f BF |
893 | if (retval) |
894 | goto out_free_all; | |
895 | return 0; | |
896 | out_free_all: | |
26808d3f BF |
897 | remove_proc_entry("fs/nfs/exports", NULL); |
898 | remove_proc_entry("fs/nfs", NULL); | |
e331f606 | 899 | out_free_idmap: |
dbf847ec BF |
900 | nfsd_idmap_shutdown(); |
901 | out_free_lockd: | |
26808d3f | 902 | nfsd_lockd_shutdown(); |
e331f606 | 903 | nfsd_export_shutdown(); |
dbf847ec | 904 | out_free_cache: |
e331f606 | 905 | nfsd_reply_cache_shutdown(); |
d5c3428b BF |
906 | out_free_stat: |
907 | nfsd_stat_shutdown(); | |
26808d3f | 908 | nfsd4_free_slabs(); |
1da177e4 LT |
909 | return retval; |
910 | } | |
911 | ||
912 | static void __exit exit_nfsd(void) | |
913 | { | |
914 | nfsd_export_shutdown(); | |
d5c3428b | 915 | nfsd_reply_cache_shutdown(); |
1da177e4 LT |
916 | remove_proc_entry("fs/nfs/exports", NULL); |
917 | remove_proc_entry("fs/nfs", NULL); | |
918 | nfsd_stat_shutdown(); | |
919 | nfsd_lockd_shutdown(); | |
1da177e4 | 920 | nfsd_idmap_shutdown(); |
e8ff2a84 | 921 | nfsd4_free_slabs(); |
1da177e4 LT |
922 | unregister_filesystem(&nfsd_fs_type); |
923 | } | |
924 | ||
925 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
926 | MODULE_LICENSE("GPL"); | |
927 | module_init(init_nfsd) | |
928 | module_exit(exit_nfsd) |